JP5035953B2 - Headrest device for active headrest - Google Patents

Description

  The present invention relates to a headrest device (active headrest) for an active headrest that protects a person at the time of impact (collision). In this collision, the head (neck is extended) before the head is raised (neck extension). In order to protect the head and neck, the headrest is moved upward (lifted) and tilted forward (forward tilted) at high speed (and instantaneously). Plan. Thus, the present invention relates to a headrest device for an active headrest that avoids whiplash and neck injury.

  As is well known, the evolution of quality demanded of automobiles (vehicles) meets the various needs of passengers and others by sequentially achieving emissions → horsepower → fuel consumption → safety → quietness → improvement in ride comfort. . Among them, improvement of the function of the headrest is desired due to the importance of safety and the like. For example, an active headrest is put into practical use and an invention that supports the practical use is cited. What is required of this headrest is that the headrest can be raised and tilted forward at high speed, its precise movement, or the generation of rattling noise, and the occurrence of frequent accidents and / or collisions. From the standpoint of diversification and the like, it is an essential requirement that the headrest surely plays a role in such an emergency.

  However, this headrest eliminates contact with the human head in order to respond to the passenger's request and eliminates discomfort, and is usually installed so as to be approximately 30 mm to 50 mm away from the head (back of the head). It is a state in line with the hope of However, in an emergency situation at the time of impact and / or collision (assumed to be at the time of collision), since the headrest is separated as described above, an unexpected problem is caused, so an example including the relationship with the seat is included. explain.

  In the conventional seat, the back is in contact with the seat back for safe and / or comfortable driving, so that the back is protected by the seat of this structure at the time of impact. However, the headrest device described above does not protect the head from being separated from the headrest. This is because the head is raised vectorwise at the time of the collision, and the neck is stretched, for example, from a slight injury such as whiplash, to a neck injury and / or Or, an extremely heavy state such as cutting occurs, causing a great deal of damage to a person.

  In view of the above, various inventions have recently been proposed in order to avoid whiplash and / or neck injury (protection of the neck and / or head) that occur during a collision. As an example, literatures are listed below. However, it is not necessarily considered sufficient as a headrest device for an active headrest capable of instantaneously ascending a predetermined distance and tilting forward to protect the neck.

  First, the document (1) includes a “vehicle seat” disclosed in JP-A-2005-296266. The outline is composed of an expandable / contractable side frame provided on the seat frame, an actuator having a forward tilt mechanism provided between the side frames, and a headrest stay that can be raised and lowered on a headrest support provided on the actuator. The headrest can be tilted forward by the forward tilt mechanism, and the headrest can be lifted by raising the headrest stay. When the headrest is lifted and tilted forward, the neck and / or head is protected by rearward movement of the passenger's upper body during a rear-end collision (collision), and the neck and / or head is moved upward. It is intended to protect the head and / or the like.

  Next, Document (2) includes “Vehicle seat structure” of Japanese Patent Laid-Open No. 2001-163099. The outline is that the headrest holder for supporting the headrest stay can be tilted forward and raised through the guide means provided on the frame, and the guide means can be returned by the regulating spring, and the guide means can be tilted forward and raised. Is controlled by passive means such as a cloth belt disposed in the seat back, and it is intended to protect the neck and / or head as in the case of the literature (1).

  Reference (3) includes an “automobile seat” disclosed in Japanese Patent Application Laid-Open No. 2000-219069. The outline is an upper pipe provided in each seatback frame, a pipe frame that is attached to and fixed to the upper pipe, and a headrest stay that can be inserted and removed, and the pipe frame is inclined forward. A headrest support frame and a pressure receiving portion provided on the support frame and a frame for tilting the headrest forward are configured. Accordingly, the pressure of the pressure receiving portion moves the support frame and the pipe frame, and the seat back is raised and tilted forward. With this series of operations, the amount of movement of the pressure receiving part is ensured by the rearward movement of the upper body of the occupant during a collision, and the movement distance of the headrest is increased, or the series of operations is achieved with a simple configuration. This is intended.

  Furthermore, the literature (4) includes “automobile seat” disclosed in Japanese Patent Application Laid-Open No. 2000-21114. The outline is a structure in which the headrest support frame of the headrest is provided at the upper end portion of the lever / link mechanism fixed to the seat back frame, and this lever / link mechanism is attached to the pressure receiving portion that moves under the load at the time of impact. It is composed of a lever that swings up and down in conjunction, a first link provided between the lever and the headrest support frame, and a second link provided between the first link and the seat back frame, The movement amount of the pressure receiving portion is increased, and the headrest support frame and the headrest are moved obliquely forward and upward to avoid adverse effects based on the rising of the head (protection of the neck and / or head).

JP-A-2005-296266 JP 2001-163099 A JP2000-219069 JP2000-2111410A

  Document (1) is intended to protect the neck and / or head in the event of a collision through the rising and forward tilting of the headrest. However, in this literature (1), it is the structure which employ | adopts an actuator, and is a structure which provides a forward tilt mechanism in this actuator. Therefore, it is conceivable that the structure becomes complicated, or that it may not operate correctly in an emergency in the event of a collision, and there is room for improvement. Further, since the seat back epidermis is lifted, there is a possibility that resistance is generated when the active headrest is lifted and / or tilted forward. In particular, problems may occur in the case of skins that are tough and / or less stretchable, such as leather upholstery, synthetic leather, etc.

  Reference (2) intends to protect the neck and / or head at the time of a collision through the rising and forward tilting of the headrest. However, in this document (2), the headrest stay is raised by passive means such as a cloth belt. Therefore, it is conceivable that the moving distance of the ascent is insufficient. For example, in order to protect the head movement at the time of collision comprehensively, there is a point to be improved somewhat. Conceivable. The problem of the epidermis is almost the same as in the literature (1).

  References (3) and (4) intend to raise the headrest to the front side and to comprehensively protect the movement of the head at the time of collision. However, with this configuration, there is room for improvement in the ascent distance and the ascent speed in order to positively raise and forward tilt the headrest and comprehensively protect the head movement at the time of collision. In addition, when considering the movement of the head at the time of collision and ensuring a rise and / or descent with good responsiveness, it is not necessarily considered sufficient, and there is room for improvement. The problem of the epidermis is almost the same as in the literature (1).

  However, regardless of the occupant's body shape, sitting posture, or the like, there is no active headrest that exactly corresponds to the purpose of comprehensively protecting the movement of the head at the time of collision. In addition, there are currently no inventions and / or products that improve the safety and security of passengers or ensure the comfort of driving and driving, etc., with various improved active headrest configurations. It is.

  In view of the above, the present invention intends to provide a headrest device for an active headrest that can exhibit the following features “1” to “6”.

“1” An active headrest that is embedded in a seat back and is composed of an elevating and lowering device provided on the frame and / or intermediate member of the seat back to control the upward and forward tilt, and a drive main unit. The headrest that protects this head (neck) can be raised and tilted at a high speed before the head is raised and / or the neck is stretched (the headrest is Proposal of a headrest device for an active headrest capable of avoiding whiplash, avoiding cervical injury, etc.
“2” The function of the headrest can be maintained even if the vehicle is partially damaged, the headrest can be lowered and the headrest can be reused, or the responsive rise and fall and forward tilt can be achieved. A headrest device for an active headrest that can be used for practical use, and
“3” The driving main body device and the lifting device are connected via a medium means (one or preferably several wires), and the lifting device is operated by the command of the driving main device. And a proposal of a headrest device for an active headrest that can instantaneously (at high speed) and can be lifted and tilted forward.
“4” Regardless of the body type of the passenger (height, weight, weight, obesity, etc.) or sitting posture (under all conditions), the head can be protected appropriately. Proposing a headrest device for an active headrest that can ensure safety and security, or ensure driving and driving comfort,
"5" In the lifting device, the headrest is tilted forward with a support, a movable body, and a support arm, and the headrest is lifted with a derivative, the lifting body, a moving body, and a cylinder, and part of it Proposing a headrest device for an active headrest that can perform this forward tilting and ascending motion reliably and without malfunctioning by using a shared configuration;
[6] A headrest device for an active headrest that can lift and / or tilt the active headrest regardless of the skin of the seat back (without pulling the skin) and can eliminate the resistance caused by the lifting of the skin. Intended to propose.

  The invention of claim 1 is intended to achieve the objects described in the above-mentioned “1” to “6”.

Claim 1 is a headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (upward) of the headrest and forward inclination (forward inclination),
This ascending / forward tilting mechanism
A lifting device provided on a frame and / or an intermediate member of a vehicle, a driving body device provided on a frame and / or an intermediate member for supporting the movement of the lifting device, and one side connected to the driving main device, and the other A medium means constituted by a wire or a suspension member linked to the lifting device, and a frame and / or a locking device provided on the intermediate member for releasing the locking of the medium means,
Also, this headrest device
A headrest bracket connected to the lifting device, a headrest support inserted in the headrest bracket, a headrest stay loosely fitted in the headrest support, and a headrest provided in the headrest stay,
Also, the lifting device
A support provided on the frame and / or the intermediate member, a movable body pivotally supported by a pivotal support portion of the support, a support arm for supporting a headrest bracket provided at both ends of the movable body, and the support Elevating body that moves up and down along the guide hole of the support body provided between the bodies, a moving body and a locking device that control raising and lowering and / or stopping of the elevating body, and the support body that allows insertion of the moving body A derivative provided on the movable body, the medium means provided on the movable body, a cylinder portion on which the support arm is loosely fitted while raising and lowering the headrest bracket integrally provided on the lift, and the derivative and the lift And a first spring secured to
The locking device is a locking means provided in the derivative, and the locking means is configured to lock or unlock the lifting body,
In the operation of the drive main unit, the locking device releases the locking to the medium means, and tensions the medium means to operate the support arm and the movable body of the lifting device, and the headrest bracket and the headrest are lifted. It is a headrest device for an active headrest configured to tilt forward.

  The invention of claim 2 is intended to achieve the same object as that of claim 1.

Claim 2 is a headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (ascent) and forward inclination (forward inclination) of the headrest,
This ascending / forward tilting mechanism
A lifting device provided on a frame and / or an intermediate member of a vehicle, a driving body device provided on a frame and / or an intermediate member for supporting the movement of the lifting device, and one side connected to the driving main device, and the other A medium means constituted by a wire or a suspension member linked to the lifting device, and a frame and / or a locking device provided on the intermediate member for releasing the locking of the medium means,
Also, this headrest device
A headrest bracket connected to the lifting device, a headrest support inserted in the headrest bracket, a headrest stay loosely fitted in the headrest support, and a headrest provided in the headrest stay,
The lifting device is
A support provided on the frame and / or the intermediate member, a movable body pivotally supported by a pivotal support portion of the support, a support arm for supporting a headrest bracket provided at both ends of the movable body, and the support Elevating body that moves up and down along the guide hole of the support body provided between the bodies, a moving body and a locking device that control raising and lowering and / or stopping of the elevating body, and the support body that allows insertion of the moving body And the medium means provided on the moving body, the headrest bracket provided integrally with the lifting body, and the cylindrical portion on which the support arm is loosely fitted, and the concave portion of the derivative are moved. It consists of a first spring that is tensioned to the body,
The locking device is a locking means provided in the derivative, and the locking means is configured to lock or unlock the lifting body,
In the operation of the drive main unit, the locking device releases the locking to the medium means, and tensions the medium means to operate the support arm and the movable body of the lifting device, and the headrest bracket and the headrest are lifted. It is a headrest device for an active headrest configured to tilt forward.

  The invention of claim 3 is intended to achieve the object of claim 1 or claim 2 and to provide an operating portion of the lifting device in the headrest device for an active headrest that is optimal for achieving the object. .

Claim 3 is a headrest device for an active headrest according to claim 1 or claim 2,
The operating portion of the lifting device provided on the seat back includes a pulley provided in the support, the medium means mounted on the pulley, the moving body that holds the medium means, and the moving body is fixed. It is a headrest device for an active headrest configured to be a lifting body that is stopped.

  The invention of claim 4 is intended to achieve the object of claim 1 or claim 2 and to provide a drive main body device in a headrest device for an active headrest that is optimal for achieving the object.

Claim 4 is a headrest device for an active headrest according to claim 1 or claim 2,
The drive main unit includes a rotating body provided on the frame and / or the intermediate member, an operating body pivotally attached to the rotating body and provided on the frame and / or the intermediate member, and a third body locked to the operating body. It is a headrest device for an active headrest configured as a spring and the medium means locked to the rotating body.

  The inventions of claims 5 and 6 are intended to achieve the object of claim 2 and to provide a moving body in a headrest device for an active headrest that is optimal for achieving the object.

Claim 5 is a headrest device for an active headrest according to claim 2,
The moving body is composed of a moving tube and a moving connecting body provided on the moving tube, and a screw carved on the inner peripheral surface of the moving tube meshes with a screw carved on the outer peripheral surface of the moving connecting body. It is a headrest device for an active headrest that is configured.

Moreover, Claim 6 is a headrest device for an active headrest according to Claim 2,
This moving body is composed of a moving pipe and a moving connecting body provided on the moving pipe. A chamber is formed between the moving pipe and the moving connecting body, and a check that allows air to enter and leave the chamber. It is a headrest device for an active headrest configured to open a valve and / or a hole.

  The invention of claim 7 is intended to achieve the object of claim 2 and to provide a lifting device locking means in a headrest device for an active headrest that is optimal for achieving this object.

Claim 7 is a headrest device for an active headrest according to claim 2,
The locking means of the lifting body is a headrest device for an active headrest that is configured to be locked and lifted to the lifting body, or locked to the medium means and configured to be unlocked. is there.

  The invention of claim 8 is intended to achieve the object of claim 3 and to provide an adjusting means for adjusting the length of the medium means in the headrest device for an active headrest that is optimal for achieving the object. .

Claim 8 is a headrest device for an active headrest according to claim 3,
This is a headrest device for an active headrest having a configuration in which an adjusting means for adjusting the length of the medium means is provided at an intermediate portion of the medium means.

The invention of claim 1 is a headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (rise) and forward inclination (forward inclination) of the headrest,
Ascending and tilting mechanism,
Elevating device provided on vehicle frame and / or intermediate member, frame for supporting movement of elevating device and / or driving main device provided on intermediate member, one connected to driving main device, and other as elevating device A medium means constituted by a wire or a suspension member linked to each other, and a frame and / or a locking device provided in the intermediate member for releasing the locking of the medium means,
The headrest device
Consists of a headrest bracket connected to the lifting device, a headrest support inserted into the headrest bracket, a headrest stay loosely fitted to the headrest support, and a headrest provided on the headrest stay.
The lifting device
A support provided on the frame and / or the intermediate member, a movable body that is movably supported by a pivotal support portion of the support, a support arm for supporting the headrest bracket provided at both ends of the movable body, and a support provided between the supports. In addition, a lifting body that moves up and down along the guide hole of the support body, a moving body and a locking device that control lifting and / or stopping of the lifting body, a derivative provided on the support body that allows insertion of the moving body, and a moving body The medium means provided on the lifting / lowering body, the headrest bracket integrally provided on the lifting / lowering body, and the cylindrical portion on which the support arm is loosely fitted, and the first spring that is secured to the lifting / lowering body by tension. ,
The locking device is a locking means provided in the derivative, and the locking means is configured to lock or unlock the lifting body,
The operation of the drive main unit is configured to release the locking to the medium means by the locking device and to actuate the support arm and the movable body of the lifting device by tensioning the medium means to raise and forward tilt the headrest bracket and the headrest. This is a headrest device for an active headrest.

  Therefore, claim 1 has the following features.

  “1” An active headrest that is embedded in a seat back and is composed of an elevating and lowering device provided on the seat back frame for controlling ascending and forward tilting and a driving main body. At the time of the collision, the head is lifted and / or The headrest that protects the head (neck) can be raised and tilted at high speed before the neck stretches (after the collision, the headrest is As a configuration in an inclined state (hereinafter the same), it is possible to avoid whiplash and avoid neck injury.

  “2” The function of the headrest can be maintained even if the vehicle is partially damaged, the headrest can be lowered and the headrest can be reused, or the responsive rise and fall and forward tilt can be achieved. Can be secured and can be put to practical use.

  “3” The driving main body device and the lifting device are connected via a medium means (one or preferably several wires), and the lifting device is operated by the command of the driving main device. Is configured to rise and tilt forward, and this rise and forward tilt are possible instantaneously (at high speed).

  “4” Regardless of the body type of the passenger (height, weight, weight, obesity, etc.) or sitting posture (under all conditions), the head can be protected appropriately. Therefore, safety and security can be ensured, or driving and driving comfort can be ensured.

  "5" In the lifting device, the headrest is tilted forward with a support, a movable body, and a support arm, and the headrest is lifted with a derivative, the lifting body, a moving body, and a cylinder, and part of it By using the shared configuration, the forward tilting and ascending operations can be performed reliably and without malfunction. In addition, the characteristics of the parts can be reliably executed.

  “6” The active headrest can be raised and / or tilted forward regardless of the seat back skin (without pulling the skin), and the resistance caused by the lifting of the skin can be eliminated.

The invention of claim 2 is a headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (ascent) and forward inclination (forward inclination) of the headrest,
Ascending and tilting mechanism,
Elevating device provided on vehicle frame and / or intermediate member, frame for supporting movement of elevating device and / or driving main device provided on intermediate member, one connected to driving main device, and other as elevating device A medium means constituted by a wire or a suspension member linked to each other, and a frame and / or a locking device provided in the intermediate member for releasing the locking of the medium means,
The headrest device
Consists of a headrest bracket connected to the lifting device, a headrest support inserted into the headrest bracket, a headrest stay loosely fitted to the headrest support, and a headrest provided on the headrest stay.
The lifting device
A support provided on the frame and / or the intermediate member, a movable body that is movably supported by a pivotal support portion of the support, a support arm for supporting the headrest bracket provided at both ends of the movable body, and a support provided between the supports. In addition, a lifting body that moves up and down along the guide hole of the support body, a moving body and a locking device that control lifting and / or stopping of the lifting body, a derivative provided on the support body that allows insertion of the moving body, and a moving body Medium means provided on the lift, and a headrest bracket integrally provided on the lifting body, as well as a cylindrical portion on which the support arm is loosely fitted, a concave portion of the derivative, and a first spring secured to the movable body. Configure
The locking device is a locking means provided in the derivative, and the locking means is configured to lock or unlock the lifting body,
The operation of the drive main unit is configured to release the locking to the medium means by the locking device and to actuate the support arm and the movable body of the lifting device by tensioning the medium means to raise and forward tilt the headrest bracket and the headrest. This is a headrest device for an active headrest.

  Accordingly, the second aspect of the present invention has the feature that the invention of the second aspect can achieve the same object as that of the first aspect.

Invention of Claim 3 is the headrest apparatus for active headrests of Claim 1 or Claim 2, Comprising:
The operating part of the lifting device provided in the seat back is a pulley provided on the support, a medium means mounted on the pulley, a moving body locking the medium means, and a lifting body to which the moving body is fixed. It is a headrest device for an active headrest that is configured.

  Accordingly, the third aspect has features such that the object of claim 1 or claim 2 can be achieved, and the operation unit of the lifting device in the headrest device for an active headrest that is optimal for achieving the object can be provided. .

Invention of Claim 4 is the headrest apparatus for active headrests of Claim 1 or Claim 2, Comprising:
The drive main unit includes a rotating body provided on the frame and / or the intermediate member, an operating body pivotally attached to the rotating body and provided on the frame and / or the intermediate member, and a third spring locked to the operating body, It is a headrest device for an active headrest configured as a medium means that is locked to a rotating body.

  Therefore, claim 4 has the characteristics that the object of claim 1 or claim 2 can be achieved, and the driving main body device in the headrest device for an active headrest that is optimal for achieving this object can be provided.

The invention of claim 5 is a headrest device for an active headrest according to claim 2,
The moving body is composed of a moving tube and a moving connecting body provided on the moving tube, and the active body is configured such that the screw engraved on the inner peripheral surface of the moving tube meshes with the screw engraved on the outer peripheral surface of the moving connecting body. A headrest device for a headrest.

The invention of claim 6 is a headrest device for an active headrest according to claim 2,
The moving body is composed of a moving pipe and a moving connecting body provided on the moving pipe, and a check valve and / or a hole that forms a chamber between the moving pipe and the moving connecting body and allows air to enter and exit the chamber. Is a headrest device for an active headrest that is configured to open.

  Accordingly, the inventions of claims 5 and 6 have the characteristics that the object of claim 2 can be achieved, and that the moving body in the headrest device for an active headrest that is optimal for achieving this object can be provided.

The invention of claim 7 is a headrest device for an active headrest according to claim 2,
The locking means for the lifting body is a headrest device for an active headrest that is configured to be locked and unlocked with respect to the lifting body, or configured to be locked and unlocked with respect to the medium means.

  Accordingly, the seventh aspect has the characteristics that the object of the second aspect can be achieved, and that the lifting / lowering device locking means in the headrest device for an active headrest optimal for achieving the object can be provided.

The invention of claim 8 is a headrest device for an active headrest according to claim 3,
This is a headrest device for an active headrest having a configuration in which an adjusting means for adjusting the length of the medium means is provided at an intermediate portion of the medium means.

  Therefore, claim 8 has the characteristics that the object of claim 3 can be achieved, and an adjusting means for adjusting the length of the medium means in the headrest device for an active headrest optimal for achieving this object can be provided. .

  The drawings will be explained.

  FIG. 1 is an overall scale side view showing an example of a vehicle (automobile) seat and a seat back, and FIG. 2-1 conceptually shows the relationship between a normal seat back (before a collision) and an active headrest. FIG. 2-2 is a side schematic view conceptually showing the relationship between the seat back at the time of collision and the active headrest.

  FIG. 3A is an overall front view illustrating the relationship between the active headrest lifting device and the headrest device during normal operation in the first example, and FIG. 3-2 is elevated from the time of the collision in the first example. FIG. 3-3 is an overall front view showing the relationship between the active headrest lifting device and the headrest device, and FIG. 3-3 is a diagram illustrating the relationship between the active headrest lifting device after the collision and the headrest device in the first example. 4-1 is a side view of FIG. 3-1, and FIG. 4-2 is a side view of FIG. 3-3.

  5A is an overall front view showing the relationship between the headrest device and the active headrest lifting / lowering device at the normal time in the second example, and FIG. 5-2 is raised from the time of the collision in the second example. FIG. 5-3 is an overall front view showing the relationship between the active headrest lifting device and the headrest device, and FIG. 5-3 is the overall view showing the relationship between the headrest device and the active headrest lifting device after the collision in the second example. 6-1 is a side view of FIG. 5-1, FIG. 6-2 is a side view of FIG. 5-3, and FIG. 7-1 is an enlarged cross-sectional view for explaining the relationship between the derivative and the locking means. 7-2 is an overall front view of an example in which the relationship between the lifting body and the movable connecting body is integrated, and FIG. 7-3 is another example showing the relationship between a partial wall surface of the locking means and the locking spring. FIG. 7-4 is a partial wall surface of the locking means and is locked. Enlarged front view showing still another example showing a relationship between pulling, FIG. 8 is a plan view of the Figure 5-1.

  FIG. 9A is an overall front view showing the relationship between the lifting device and the headrest device of the active headrest at the normal time in the third example, and FIG. 9B is the active headrest raised from the time of the collision in the third example. FIG. 9-3 is an overall front view showing the relationship between the lifting device of the active headrest after the collision and the headrest device in the third example. It is.

  FIG. 10-1 is an overall front view showing the relationship between the lifting device and the headrest device of the active headrest at the normal time in the fourth example, and FIG. 10-2 is the active headrest raised from the time of the collision in the fourth example. FIG. 10-3 is an overall front view showing the relationship between the lifting device of the active headrest after the collision and the headrest device in the fourth example. FIG. 10-4 is a front view of the whole of the fourth example, showing the relationship between the headrest device and the lifting device for the active headrest in which the impact actuating means, the sheath tube, and the medium means are raised, at the normal time. -5 is a sectional view of the main part showing the relationship between the headrest device and the lifting device for the active headrest in the normal state in the fourth other example, and FIG. FIG. 10-7-1 is an enlarged cross-sectional view of an example illustrating the relationship between the sheath tube and the impact actuation means, and FIG. FIG. 10-8-1 is an enlarged cross-sectional view showing an example of a locking hole of a moving body, and FIG. 10-8-2 shows movement. FIG. 10-8-3 is an enlarged cross-sectional view showing another example of the locking hole of the movable body, and FIG. 10-8-3 is another enlarged cross-sectional view showing another example of the locking hole of the body.

  FIG. 11A is a front view showing an example of a configuration in which the moving body of the active headrest in a normal state in the fifth example and a moving coupling body inserted into the moving body are controlled by an air damper system. -2 is a front view showing an example of a configuration in which the moving body of the active headrest raised from the time of the collision in the fifth example and the moving coupling body inserted into the moving body are controlled by an air damper system, FIG. 11-3 FIG. 11-4 is a front view showing an example of a configuration in which the moving body of the active headrest after the collision in the fifth example and a moving coupling body inserted into the moving body are controlled by an air damper system, FIG. FIG. 11-5 is an enlarged sectional view showing still another example of the relationship between the moving body and the check valve.

  12-1 to 12-6 show the main parts of all the drawings, and FIG. 12-1 is an enlarged cross-sectional view showing the relationship between the moving body and the medium means (wire). 2 is a sectional view showing the relationship between the movable body and the movable coupling body, FIG. 12-3 is an enlarged front view showing the relationship between the movable body and the pulley, and FIG. 12-5 is an enlarged cross-sectional view showing the relationship, FIG. 12-5 is an enlarged front view of the main part for explaining the relationship between the resin bearing of the support arm and the headrest bracket, etc., and FIG. 12-6 is a view of the headrest bracket and the second spring. It is the enlarged plan view which showed the relationship.

  FIG. 13-1 is an enlarged side view of an example of a driving main unit at a normal time, FIG. 13-2 is an enlarged side view of an example of the driving main unit at the time of a collision, and FIG. 13-1 is a front view showing an example of a third spring used for 13-1 etc., FIG. 13-4 is an enlarged front view showing another example of a normal driving main unit, and FIG. 13-5 is FIG. 4 is a side view of FIG.

  FIG. 14-1 is an enlarged cross-sectional view showing an example of the adjusting means for adjusting the length of the medium means, FIG. 14-2 is a front view of FIG. 14-1, and FIG. FIG. 14-4 is a schematic diagram for explaining the operation of the medium means shown in FIG. 14-1.

  FIG. 15 is a block diagram showing an example of a combination of the moving body shown in FIGS. 11-1 to 11-5 and the like and a structure that controls the moving connecting body inserted into the moving body by an air damper method. .

  An embodiment of the present invention will be described by dividing it into each main part.

“First, a basic configuration common to the embodiments will be described.”
The present invention is an active headrest B that is mounted on a seat back A1 that constitutes a seat A of a vehicle. The active headrest B includes a metal frame 1 embedded in the seat back A1 and a lower end of the frame 1. A drive main unit C provided on the medium, medium means D (wire 20) connected to the drive main unit C and provided from below to above the frame 1 (seat back A1), and the medium. A lifting device E connected to the means D and provided above the frame 1 and a locking device for locking (regulating stoppage) and / or releasing the lifting device E, the driving main body device C, or the medium means D. The device F, and a collision sensor (not shown) for controlling the operation of the locking device F provided if necessary, the lifting device E, the locking device F, and the medium means D act to raise and forward tilt. The headrest device H provided in the frame 1 comprises a head rest G as the ability to principal components. In addition, the collision sensor is provided at an appropriate position of the vehicle.

“First, a first example of the lifting device E will be described with reference to FIGS. 2-1, 2-2, FIGS. 3-1 to 4-2.”
The lifting device E includes a support body 2 provided with a locking portion 200 or a stopper hole 201 to be tightened on the back side (rear of the seat back A1) provided to be locked or held on the frame 1. A bracket 202 provided in a pair with the support 2 (so as to confront each other in the width direction of the sheet A), a forwardly inclined guide piece 203 provided with a guide hole 203a provided with a locking step, and the bracket A movable body 6 provided between 202 at a movable position via a pivot 5, and a headrest bracket (described later) and / or a cylindrical portion (described later) of a lifting body (described later) provided at both ends of the movable body 6, respectively. Is provided at the free end of the pair of support arms 7 (for example, in the vertical direction in FIG. 3A), a substantially gate-shaped derivative 8 in front view provided on the support 2, and the derivative 8. Stepped part 800 and its center part A recess 801 provided in a cylinder 8b into which a moving body to be described (which may also serve as a moving connecting body described later) is inserted, and a hole for penetrating the medium means D (wire 20) provided in the top plate portion of the recess 801 802, a lifting body 10 inserted into the space portion 8a of the derivative 8, a pair of cylindrical portions 11 inserted into the support arm 7 extending from both end portions 10a of the lifting body 10, and the lifting body 10 The movable body 14 is inserted into the concave portion 801 and moves up and down the concave portion 801. The movable body 14 is locked to the top plate portion of the concave portion 801 and to a substantially intermediate position of the movable body 14 (movable body). 14 for pulling and / or returning) and a locking means 16 (locking device F) for locking the elevating body 10. And in this example, it is the structure made into the raising / lowering system by the mobile body 14 independently. In this example, when the first spring 15 described above is configured to return the moving body 14, the headrest G can be automatically returned. It is effective for increasing the speed by assisting 10 ascent.

  Accordingly, the operation of the lifting device E will be described. At the time of a stop, the locking means 16 (this example is not shown) is unlocked from the lifting body 10 or is engaged with the medium means D (wire 20). When the stop is released, the wire 20 is pulled toward the seating surface of the seat A (arrow “I”). Through this tension and the return of the first spring 15, the elevating body 10 ascends the space 8 a of the derivative 8 (in the headrest G direction (arrow “B”)). As a result, the cylindrical portion 11 rises in the support arm 7 sequentially. And the raising of this cylinder part 11 pushes up the headrest bracket (the "headrest support" mentioned later) of the headrest apparatus H, As a result, the headrest G raises.

  And when this raising / lowering body 10 raises, the said raising / lowering body 10 and its cylinder part 11 move to the front side (forward direction of a vehicle) of seat back A1. And if this cylinder part 11 moves, the headrest bracket connected with this cylinder part 11 will move, and according to this movement, the support arm 7 will move centering on the pivot 5 (arrow "C"). This is a configuration in which the forward tilt of the headrest G is ensured through the movement of each process described above.

  Since the above-described ascent and forward tilt proceed simultaneously and are performed instantaneously, the headrest G can be lifted and tilted forward (raised and forward tilted) reliably, so that an impact on the neck and / or head is achieved. And can prevent the neck and / or head from being damaged.

  In this example, although the locking device F is not shown, the locking device F has a configuration for locking the elevating body 10 or a configuration for locking the driving main body device C and the medium means D described later. Therefore, the movable body 14 is raised by releasing the locking device F and pulling the medium means D.

“Next, a second example of the lifting device E will be described with reference to FIGS. 2-1, 2-2, and FIGS.
The lifting device E includes a support body 2 provided with a locking portion 200 or a stopper hole 201 to be tightened on the back side (rear of the seat back A1) provided to be locked or held on the frame 1. A bracket 202 provided in a pair with the support 2 (so as to confront each other in the width direction of the sheet A), a forwardly inclined guide piece 203 provided with a guide hole 203a provided with a locking step, and the bracket A pair in which a movable body 6 movably provided between 202 and a headrest bracket (to be described later) and / or a cylinder portion 11 of the elevating body 10 respectively inserted at both ends of the movable body 6 is inserted. For example, a support arm 7 in the vertical direction in FIG. 5A, a substantially gate-shaped derivative 8 provided on the support 2 in front view, and a stepped portion 800 provided on the free end of the derivative 8, The moving body 14 provided at the center is inserted. Recessed portion 801, a hole 802 for penetrating medium means D (wire 20) provided in the top plate portion of the recessed portion 801, the lifting body 10 inserted into the space portion 8 a of the derivative 8, and both end portions of the lifting body 10 A pair of cylindrical portions 11 inserted into the support arm 7 extending from 10a, a movable connecting body 13 having a screw 1300 standing on the elevating body 10, and a screw 1300 of the moving connecting body 13 are engaged. The movable body 14 that has a screw 1400 and is fitted on the movable connecting body 13 is locked to the top plate portion of the concave portion 801 and to a substantially intermediate position of the movable body 14 (the movable body 14 The first spring 15 (for pulling and / or returning) and the locking means 16 (locking device F) for locking the elevating body 10 are configured. In this example, the moving body 14 and the moving connecting body 13 are configured to be screwed. The moving body 14 is fitted in the recess 801 and moves up and down in the recess 801. In this example, in the case where the first spring 15 described above is used for tension, adjustment with the second spring 17 for return is used to assist the raising of the lifting body 10. Effective for higher speeds. Further, in the case of the configuration for returning the moving body 14, it is useful that the headrest G can be automatically returned and useful, and the second spring 17 can be omitted.

  Accordingly, the operation of the lifting device E will be described. At the time of a stop, the wire 20 is seated on the seat A by releasing the locking of the locking means 16 to the lifting body 10 or releasing the locking to the wire 20 described later. It is pulled toward the surface (arrow “I”). Through this tension and the return of the first spring 15, the elevating body 10 ascends the space 8 a of the derivative 8 (in the headrest G direction (arrow “B”)). As a result, the cylindrical portion 11 rises in the support arm 7 sequentially. And the raising of this cylinder part 11 pushes up the headrest bracket (the "headrest support" mentioned later) of the headrest apparatus H, As a result, the headrest G raises.

  Then, accompanying the ascent of the elevating body 10, the guide pins 18 provided at both end portions 10 a of the elevating body 10 rise along the inclined guide holes 203 a of the guide piece 203, The cylinder part 11 is movable in front of the seat back A1 (the forward direction of the vehicle). And if this cylinder part 11 moves, the headrest bracket connected with this cylinder part 11 will move, and according to this movement, the support arm 7 will move centering on the pivot 5 (arrow "C"). This is a configuration in which the forward tilt of the headrest G is ensured through the movement of each process described above.

  Since the above-described ascent and forward tilt proceed simultaneously and instantaneously, the headrest G can be lifted and tilted with certainty, so that the impact on the neck and / or head can be reliably received, and There is a feature capable of avoiding damage to the neck and / or head.

In this example, the locking device F is configured to lock the elevating body 10 and is a pair of locking means 16 including a step 1000 that can be locked to the stepped portion 800 of the derivative 8. Therefore, when the lifting body 10 is raised, the locking spring 19 is compressed and the stepped portion 800 is auctioned up. And this latching means 16 is provided in the raising / lowering body 10 so that it can be protruded and retracted, It is the structure which protrudes / delays via the spring 1600 provided between the hollow parts of the raising / lowering body 10, Comprising: The body 10 and the derivative 8 are configured to be locked or unlocked. In the figure, reference numeral 21 denotes a pressing spring that presses the locking spring 19. A buffer space J for the locking spring 19 is provided between the locking spring 19 and a stop pin provided on the outer peripheral surface of the recess 801 of the elevating body 10 to facilitate the compression of the locking spring 19. Can be planned. The space J becomes 0 when the elevating body 10 is raised (see FIG. 5-3 and the like). The pressing spring 21 and / or the locking spring 19 can be substituted for the locking means 16, and the apparatus can be simplified. In this case, the locking means 16 is effective as a guide for the lifting body 10. The strength relationship between the first spring 15 and the pressing spring 21 and / or the locking spring 19 is determined in consideration of the movement of the moving body 14 such as the stroke and speed. It is also possible to adjust the movement of the lifting / lowering body 10 such as the stroke and the speed in relation to the movable connecting body 13 meshed with the moving body 14. It is possible to adjust movements such as speed. Therefore, the movement such as the stroke and speed can be freely adjusted, which is useful. Further, an adjustment margin I is formed between the stepped portion 800 and the stepped portion 1000. The step 1000 and the step 800 can be used as an alternative to the locking device F. FIG. 7A shows the relationship between the stepped portion 800 at the lowermost end of the derivative 8 and the stepped portion 1000 at the lowermost end of the elevating body 10, and simplifies and ensures the assembly. FIG. 7-2 is a cross-sectional view showing the relationship between the movable connecting body 13 and the lifting body 10, which is an example of an integral structure, aiming at stability and cost reduction. FIGS. 7-3 and 7-4 are enlarged front views showing the relationship between the locking spring 19 and the locking end (of the insertion recess for the locking spring 19) of the elevating body 10, and FIG. The damage to the stop spring 19 and / or the locking end is avoided and reliable engagement / disengagement is achieved. Specifically, FIG. 7-3 shows an example of the locking spring 19, and FIG. 7-4 shows an example of the locking end.

“And a third example of the lifting device E will be described with reference to FIGS. 9-1 and 9-3.”
Since this example is basically the same as the first example, the differences will be described. In this example, the convex portion 1001 provided on the lifting body 10 is directly inserted into the concave portion 801 of the derivative 8, the bush 2000 of the wire 20 is inserted into the convex portion 1001, and the wire 20 is pulled (arrow “I”). The headrest G is raised and tilted forward via In addition, another structure is based on the 2nd example of the above-mentioned raising / lowering apparatus E. FIG.

“Next, a fourth example of the lifting device E will be described based on FIGS. 10-1 to 10-8-2.”
Since this example is basically the same as the first example, the differences will be described. In this example, the moving body 14 is configured to be fitted into the concave portion 801 of the derivative 8, and the moving body 14 and the elevating body 10 are locked and / or unlocked at the time of impact. In this example, a sheath tube 1401 having a generally saddle-shaped skeleton (rib piece) shape, and engagement and / or disengagement with the sheath tube 1401 are provided. And an impact actuating means 1403.

  Here, the engagement (locking) relationship between the sheath tube 14 and the impact actuating means 1403 will be described. Locking projections projecting from the outer peripheral surface of the sheath tube 1401 in the locking holes 14a provided in the movable body 14. Reference numeral 1402 denotes a configuration that maintains the fitting relationship. The wire 20 is locked to the sheath tube 14 and / or the impact actuating means 1403.

  Hereinafter, the operation in this example will be described. For example, in a state where the drive main unit C does not operate (normal time), the sheath tube 1401 and the moving body 14 are at the lower limit as shown in FIG. The locking projection 1402 is in a normal state where the locking protrusion 1402 is fitted in the locking hole 14a provided in the moving body 14, and the impact actuating means 1403 is also in the normal state. The relationship between the locking protrusion 1402 and the locking hole 14a is maintained in this state unless the impact actuating means 1403 is expanded, and the locking protrusion 1402 is removed (unlocked) from the locking hole 14a. It is also possible to configure. Further, in a state where the driving main body device C is operated (at the time of collision), as shown in FIG. 10-3, the impact operating means 1403 is expanded, and the locking projection 1402 of the sheath tube 1401 is opened on the moving body 14. The sheath tube 1401 and the movable body 14 are engaged (locked) by being fitted into the stop hole 14a, and the sheath tube 1401 and the movable body 14 are lifted through the tension of the wire 20, and the locked state. As a result, the lifting body 10 is raised. The rise of the lifting body 10 leads to the rise of the cylinder portion 11 and the headrest G of the headrest device H, and the effect brought about by this rise is the same as in the above examples.

  In this example, even if the wire 20 is pulled by a slight press against the drive main unit C (unless a sudden impact is applied to the drive main unit C), the locking projection 1402 In this configuration, the locking hole 14a can be removed. Therefore, as shown in FIG. 10-4, the impact actuating means 1403 is compressed, and the compressed impact actuating means 1403 and the sheath tube 1401 can be raised. Thereby, even if the wire 20 is pulled by a slight press against the drive main unit C, the moving body 14 and / or the lifting body 10 and the cylinder portion 11 are prevented from being lifted (unnecessary blind movement can be prevented). . Therefore, except for a sudden impact on the driving main unit C, the headrest G is controlled to be lifted to prevent unnecessary vertical movement of the headrest G and to prevent the passenger from feeling uncomfortable.

  FIG. 10-5 shows another example of the impact actuation means 1403 and / or the sheath tube 1401. In this example, a structure in which the impact actuation means 1403 is integrally formed with the sheath tube 1401 is shown. FIG. 10-6 shows another example of FIG. 10-5, which is intended to form a bulging portion at the lower end of the impact actuating means 1403 to improve strength and prevent wear.

  10-7-1 is a cross-sectional view illustrating the relationship between the sheath tube 1401 and the drive main unit C, and when forming the locking projection 1402 on the sheath tube 1401, a pair of slits is formed, A band is formed between the slits, and a locking projection 1402 is formed on the band, and the locking projection 1402 is intended to ensure flexibility. Further, FIG. 10-7-2 shows an example in which a rib piece of the impact actuating means 1403 is bulged to form a flexible locking projection 1402, and in some cases, simplification, cost reduction, etc. For this purpose, the sheath tube 1401 is intended to be omitted.

  10-8-1 to 10-8-3 are enlarged cross-sectional views showing examples of the locking holes 14 a of the moving body 14. Ease of molding, easy locking and unlocking, etc. Intended. Reference numeral 1404 denotes a return spring for returning the sheath tube 1401.

“Further, a fifth example of the lifting device E will be described with reference to FIGS. 11-1 to 11-5 and FIG.
Since this example is basically the same as the second example, the differences will be described. In this example, the movable body 14 and the movable coupling body 13 are configured to be an air damper system, and a sealed chamber 22 is formed between the movable body 14 and the movable coupling body 13, and air to the chamber 22 is formed. The moving body 14 is moved up and down through the adjustment. For example, there is a configuration in which the air to the chamber 22 is adjusted through the hole 23 provided in the moving body 14 or the air to the chamber 22 is finely adjusted through the check valve 25. These configurations are used alone or in combination, and the movement of the moving body 14 such as the stroke and speed can be freely adjusted, which is beneficial. And by this adjustment, it is possible to adjust the movement of the headrest G, the forward tilt stroke, the speed, and the like. FIG. 11-5 is an enlarged cross-sectional view of an example in which the check valve 25 is provided on the movable coupling body 13. FIG. 14 is a view showing a combination relationship between the hole 23 and the check valve 25. The other configuration is in accordance with the second example of the lifting device E described above. In the figure, reference numeral 1301 denotes an O-ring provided on the valve body of the movable connecting body 13.

“Details of the configuration of the lifting device E and other examples will be described with reference to FIGS. 12-1 to 12-4.”
FIG. 12A is an enlarged cross-sectional view in which an example of a slippery member is mounted on the assumption that the bushing 2000 of the wire 20 rotates. FIG. 12-2 is an enlarged cross-sectional view illustrating an example of a pinpoint configuration on the assumption that the bushing 2000 of the wire 20 rotates. 12-3 is an enlarged front view showing the relationship between the movable body and the pulley, and FIG. 12-4 is an enlarged cross-sectional view showing the relationship between the locking means 16 and the locking spring 19.

“Next, the locking device F is shown in FIGS. 5-1 to 8, FIGS. 9-1 to 9-3, FIGS. 12-1 to 12-3, FIGS. 13-1 and 13-5. I will explain based on this. "
In the locking device F in this example, the examples shown in FIGS. 5-1 to 8, FIGS. 9-1 to 9-3, and FIGS. It is a configuration. Another example shown in FIG. 12A is a configuration in which a third spring, which will be described later, is regulated via a controller 30 and an actuator 31, and the actuator 31 is operated by a command from the controller 30 at the time of impact. In this configuration, the restriction to the third spring is released and the movement in the direction of the arrow “d” is possible. In addition, FIG. 12-5 is basically the same as the example of FIG.

“The drive main unit C will be described.”
The driving main body device C in this example has an example shown in FIGS. 13-1 to 13-5.

  First, in the example of FIGS. 13A to 13C, the operating body 36 pivotally supported on the frame 1 and / or the intermediate member 100 (referred to as the frame 1) via the pivot 35, and the base end of the operating body 36 The pin 37 has a recess 38 a into which the pin 37 is inserted with a degree of freedom, and is supported by the frame 1 via the pivot 38. The wire 39 is attached to the base end of the rotary body 39. A pin 40 to be locked and a third spring 41 supported by the frame 1 provided so as to be connected to the operating body 36 are configured. The third spring 41 is pivotally supported on the frame 1. The operation of this example will be described. When the third spring 41 is pressed in the direction of the arrow “d” at the time of a collision, the operating body 36 rotates about the pivot 35 as a fulcrum. The pin 37 rotates through this rotation, and the rotating body 39 rotates about the pivot 38 as a fulcrum. Then, the wire 20 is pulled in the direction of the arrow “A” as described above through the rotation of the rotating body 39. The headrest G is lifted and tilted forward through pulling in the direction of the arrow “A”. Although not shown, a return means for the operating body 36 may be provided.

  Next, in the example of FIGS. 13-4 and 13-5, the operating body 36 provided on the frame 1 via the pivot 35, the cam 43 fixed to the pivot 35, and the link 44 pivoted on the cam 43. And a rotating body 3900 whose center is pivotally supported by the link 44 and whose fulcrum is pivotally supported by the frame 1 via a pivot 3800, and a frame 1 provided so as to be connected to the operating body 36. The third spring 41 is supported. Then, this operation will be described. As described above, when the third spring 41 is pressed in the direction of the arrow “d” at the time of the collision, the operating body 36 rotates about the pivot 35 as a fulcrum. Through this rotation, the cam 43 rotates and pulls the link 44. By this tension, the rotating body 3900 rotates with the pivot 3800 as a fulcrum. Then, the wire 20 is pulled in the direction of the arrow “A” as described above through the rotation of the rotating body 3900. The headrest G is lifted and tilted forward through pulling in the direction of the arrow “A”. Other configurations are based on the above-described example.

“Next, the headrest device H will be described based on FIGS. 1 to 12-1, FIG. 12-5, and FIG. 12-6.”
In this configuration, a bearing 50 (the bearing 50 is a cylinder at the time of ascending) is connected to the cylindrical portion 11 of the lifting body 10 of the lifting device E and the lower end thereof is connected to the support arm 7 with a part thereof. A headrest bracket 51 that can be moved up and down via a head 11), a headrest support 52 inserted in the headrest bracket 51, a headrest stay 53 provided in the headrest support 52, and a headrest stay 53. The headrest support 52 and / or the headrest G is a general-purpose product, and parts are shared and / or modularized. When the headrest bracket 51 is lowered, it is effective for the stability and the mobility of the headrest G to have at least a length extending up and down the support arm 7. In the figure, reference numeral 17 denotes a second spring secured between the support arm 7 and the locking piece of the headrest bracket 51. The second spring 17 supports the headrest bracket 51 and returns the headrest bracket 51. Can be planned. As shown in FIG. 12-5, the bearing 50 includes a lower piece 5000 having flexibility, elastically supports the headrest bracket 51 and / or the cylinder portion 11, and the headrest bracket 51. It is the structure which can ensure mobility, such as these, and adhesiveness. There is a gap between the headrest bracket 51 and the lower piece 5000 is free.

  As described above, the movement of the lifting / lowering body 10 of the lifting / lowering device E and the cylindrical portion 11 is lifted by the headrest bracket 51 being pushed up with the support arm 7 as a guide. For example, as shown in FIG. It becomes a state. The details of this rising state are as described in the above-described lifting device E, and the headrest G is lifted and tilted reliably. The effect is also as described above.

  In this example, the headrest G is lowered using the fact that the second spring 17 is stretched when the headrest G is lifted, and the headrest G is lifted and tilted back after a predetermined time has elapsed. It is configured to be performed automatically (for example, an engaging step portion of the guide hole 203a) or physically (for example, an operation in which the headrest stay 53 is sandwiched between at least two fingers L and the headrest G is pressed).

  12-6 is an enlarged plan view showing the relationship between the second spring 17 and the headrest bracket 51, and is an example of means for locking the upper end of the second spring 17 to the headrest bracket 51. Is locked to the bearing 50.

“And the adjusting means K will be described with reference to FIGS. 14-1 to 14-3.”
The adjusting means K is a turn puckle type, and is provided with an adjusting rod 62 of a screw shaft mechanism and a spring 63 between the expansion and contraction tubes 60 and 61 having a fitting structure. The pair of pulleys 64 and 65 is pivotally supported, and the wire 20 is double-fitted between the pulleys 64 and 65. Therefore, the length of the wire 20 is adjusted through the expansion and / or compression of the pair of telescopic tubes 60 and 61. The spring 63 is effective for imparting stretchability to the telescopic tubes 60 and 61 or avoiding the loosening of the wire 20.

FIG. 1 is an overall scale side view showing an example of a vehicle (automobile) seat and a seat back. FIG. 2-1 is a schematic side view conceptually showing the relationship between the seat back and the active headrest during normal operation (before collision). Fig. 2-2 is a schematic side view that conceptually shows the relationship between the seat back and the active headrest during a collision. FIG. 3A is an overall front view showing the relationship between the lifting device of the active headrest and the headrest device during normal operation in the first example. FIG. 3-2 is an overall front view showing the relationship between the headrest device and the lifting device for the active headrest raised from the time of the collision in the first example. FIG. 3-3 is an overall front view showing the relationship between the headrest device and the active headrest lifting device after the collision in the first example. Fig. 4-1 is a side view of Fig. 3-1. 4-2 is a side view of FIG. 3-3 FIG. 5A is an overall front view showing the relationship between the lifting device for the active headrest and the headrest device during normal operation in the second example. FIG. 5-2 is an overall front view illustrating the relationship between the headrest device and the active headrest lifting device that has been lifted since the collision in the second example. FIG. 5-3 is an overall front view showing the relationship between the headrest device and the active headrest lifting device after the collision in the second example. 6-1 is a side view of FIG. 6-2 is a side view of FIG. 5-3. FIG. 7-1 is an enlarged sectional view for explaining the relationship between the derivative and the locking means. FIG. 7-2 is a cross-sectional view of an example in which the relationship between the lifting body and the moving connection body is integrated. FIG. 7-3 is an enlarged front view showing another example of the relationship between the partial wall surface of the locking means and the locking spring. FIG. 7-4 is an enlarged front view showing still another example of the relationship between the partial wall surface of the locking means and the locking spring. 8 is a plan view of FIG. FIG. 9-1 is an overall front view showing the relationship between the lifting device of the active headrest and the headrest device in a normal state in the third example. FIG. 9-2 is an overall front view showing the relationship between the headrest device and the lifting device for the active headrest raised from the time of the collision in the third example. FIG. 9-3 is an overall front view showing the relationship between the headrest device and the active headrest lifting device after the collision in the third example. FIG. 10-1 is a front view of the entire active headrest lifting device and the relationship between the headrest device and a normal active headrest device in the fourth example. FIG. 10-2 is an overall front view showing the relationship between the headrest device and the active headrest lifting device raised from the time of the collision in the fourth example. FIG. 10-3 is an overall front view showing the relationship between the lifting device and the headrest device of the active headrest after the collision in the fourth example. FIG. 10-4 is an overall front view showing the relationship between the headrest device and the lifting device for the active headrest in which the impact actuating means, the sheath tube, and the medium means are raised during normal time in the fourth example. Section 10-5 is a sectional view of the main part showing the relationship between the headrest device and the active headrest lifting device in the normal state in the fourth other example FIG. 10-6 is a cross-sectional view of the main part showing an example of another impact actuation means of FIG. 10-5. FIG. 10-7-1 is an enlarged sectional view of an example illustrating the relationship between the sheath tube and the impact actuating means. FIG. 10-7-2 is an enlarged cross-sectional view of another example illustrating the relationship between the sheath tube and the impact actuating means. 10-8-1 is an enlarged cross-sectional view showing an example of a locking hole of a moving body FIG. 10-8-2 is an enlarged cross-sectional view showing another example of the locking hole of the moving body FIG. 10-8-3 is an enlarged sectional view showing another example of the locking hole of the moving body FIG. 11A is a front view illustrating an example of a configuration in which the moving body of the active headrest in a normal state in the fifth example and a moving coupling body inserted into the moving body are controlled by an air damper method. FIG. 11-2 is a front view showing an example of a configuration in which the moving body of the active headrest raised from the time of the collision in the fifth example and the moving coupling body inserted into the moving body are controlled by the air damper method. FIG. 11-3 is a front view showing an example of a configuration in which the moving body of the active headrest after the collision in the fifth example and the moving coupling body inserted into the moving body are controlled by the air damper method. FIG. 11-4 is an enlarged sectional view showing another example of the relationship between the moving body and the check valve. FIG. 11-5 is an enlarged sectional view showing still another example of the relationship between the moving body and the check valve. FIG. 12-1 is an enlarged sectional view showing the relationship between the moving body and the medium means (wire). 12-2 is an enlarged cross-sectional view showing the relationship between the moving body and the moving connected body FIG. 12-3 is an enlarged front view showing the relationship between the movable body and the pulley. Fig. 12-4 is an enlarged cross-sectional view showing the relationship between the derivative and the locking means FIG. 12-5 is an enlarged front view of the main part for explaining the relationship between the resin bearing of the support arm and the headrest bracket and the like. FIG. 12-6 is an enlarged plan view showing the relationship between the headrest bracket and the second spring. FIG. 13-1 is an enlarged side view of an example of a drive main device in a normal state. FIG. 13-2 is an enlarged side view of an example of the drive main unit at the time of collision. FIG. 13-3 is a front view showing an example of a third spring used in FIG. FIG. 13-4 is an enlarged front view of another example of the drive main unit in the normal state. 13-5 is a side view of FIG. 13-4. FIG. 14-1 is an enlarged cross-sectional view showing an example of the adjusting means for adjusting the length of the medium means. 14-2 is a front view of FIG. 14-1. Schematic diagram for explaining the operation of the medium means shown in FIG. FIG. 14-4 is a schematic diagram for explaining the operation of the medium means shown in FIG. FIG. 15 is a configuration diagram showing an example of a combination of configurations in which the movable body shown in FIGS. 11-1 to 11-5 and the movable coupling body inserted into the movable body are controlled by an air damper system.

A Seat A1 Seatback B Active headrest C Drive main device D Medium means E Lifting device F Locking device G Headrest H Headrest device I Adjustment allowance J Space K Adjusting means L Finger 1 Frame 100 Intermediate member 2 Support body 200 Locking portion 201 Hole 202 Bracket 203 Guide piece 203a Guide hole 5 Pivot 6 Movable body 7 Support arm 8 Derivative 8a Space 8b Cylinder 800 Stepped portion 801 Concave portion 802 Hole 10 Lifting body 10a End portion 1000 Step portion 1001 Convex portion 11 Tube portion 13 Moving connection Body 1300 Screw 1301 O-ring 14 Moving body 14a Locking hole 1400 Screw 1401 Sheath tube 1402 Locking projection 1403 Impact operating means 1404 Return spring 15 First spring 16 Locking means 1600 Spring 17 Second spring 18 Guide pin 19 Locking spring 0 Wire 2000 Bush 21 Press spring 22 Chamber 23 Hole 25 Check valve 30 Controller 31 Actuator 35 Pivot 36 Actuator 37 Pin 38 Pivot 38a Recess 3800 Pivot 39 Rotator 3900 Rotator 40 Pin 41 Third spring 43 Cam 44 Link 50 Bearing 5000 Lower piece 51 Headrest bracket 52 Headrest support 53 Headrest stay 60 Telescopic tube 61 Telescopic tube 62 Adjustment rod 63 Spring 64 Pulley 65 Pulley

Claims (8)

A headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (rise) and forward tilt (forward tilt) of the headrest,
This ascending / forward tilting mechanism
A lifting device provided on a frame and / or an intermediate member of a vehicle, a driving body device provided on a frame and / or an intermediate member for supporting the movement of the lifting device, and one side connected to the driving main device, and the other A medium means constituted by a wire or a suspension member linked to the lifting device, and a frame and / or a locking device provided on the intermediate member for releasing the locking of the medium means,
Also, this headrest device
A headrest bracket connected to the lifting device, a headrest support inserted in the headrest bracket, a headrest stay loosely fitted in the headrest support, and a headrest provided in the headrest stay,
Also, the lifting device
A support provided on the frame and / or the intermediate member, a movable body pivotally supported by a pivotal support portion of the support, a support arm for supporting a headrest bracket provided at both ends of the movable body, and the support Elevating body that moves up and down along the guide hole of the support body provided between the bodies, a moving body and a locking device that control raising and lowering and / or stopping of the elevating body, and the support body that allows insertion of the moving body A derivative provided on the movable body, the medium means provided on the movable body, a cylinder portion on which the support arm is loosely fitted while raising and lowering the headrest bracket integrally provided on the lift, and the derivative and the lift And a first spring secured to
The locking device is a locking means provided in the derivative, and the locking means is configured to lock or unlock the lifting body,
In the operation of the drive main unit, the locking device releases the locking to the medium means, and tensions the medium means to operate the support arm and the movable body of the lifting device, and the headrest bracket and the headrest are lifted. A headrest device for an active headrest configured to tilt forward.
A headrest device for an active headrest having an ascending / forward-inclining mechanism that controls upward movement (rise) and forward tilt (forward tilt) of the headrest,
This ascending / forward tilting mechanism
A lifting device provided on a frame and / or an intermediate member of a vehicle, a driving body device provided on a frame and / or an intermediate member for supporting the movement of the lifting device, and one side connected to the driving main device, and the other A medium means constituted by a wire or a suspension member linked to the lifting device, and a frame and / or a locking device provided on the intermediate member for releasing the locking of the medium means,
Also, this headrest device
A headrest bracket connected to the lifting device, a headrest support inserted in the headrest bracket, a headrest stay loosely fitted in the headrest support, and a headrest provided in the headrest stay,
The lifting device
A support provided on the frame and / or the intermediate member, a movable body pivotally supported by a pivotal support portion of the support, a support arm for supporting a headrest bracket provided at both ends of the movable body, and the support Elevating body that moves up and down along the guide hole of the support body provided between the bodies, a moving body and a locking device that control raising and lowering and / or stopping of the elevating body, and the support body that allows insertion of the moving body And the medium means provided on the moving body, the headrest bracket provided integrally with the lifting body, and the cylindrical portion on which the support arm is loosely fitted, and the concave portion of the derivative are moved. It consists of a first spring that is tensioned to the body,
The locking device is a locking means provided in the derivative, and the locking means is configured to lock or unlock the lifting body,
In the operation of the drive main unit, the locking device releases the locking to the medium means, and tensions the medium means to operate the support arm and the movable body of the lifting device, and the headrest bracket and the headrest are lifted. A headrest device for an active headrest configured to tilt forward.
A headrest device for an active headrest according to claim 1 or 2,
The operating portion of the lifting device provided on the seat back includes a pulley provided in the support, the medium means mounted on the pulley, the moving body that holds the medium means, and the moving body is fixed. A headrest device for an active headrest configured to be a lifted body to be stopped.
A headrest device for an active headrest according to claim 1 or 2,
The drive main unit includes a rotating body provided on the frame and / or the intermediate member, an operating body pivotally attached to the rotating body and provided on the frame and / or the intermediate member, and a third body locked to the operating body. A headrest device for an active headrest configured as a spring and the medium means locked to the rotating body.
A headrest device for an active headrest according to claim 2,
The moving body is composed of a moving tube and a moving connecting body provided on the moving tube, and a screw carved on the inner peripheral surface of the moving tube meshes with a screw carved on the outer peripheral surface of the moving connecting body. A headrest device for an active headrest constructed.
A headrest device for an active headrest according to claim 2,
This moving body is composed of a moving pipe and a moving connecting body provided on the moving pipe. A chamber is formed between the moving pipe and the moving connecting body, and a check that allows air to enter and leave the chamber. A headrest device for an active headrest configured to open a valve and / or a hole.
A headrest device for an active headrest according to claim 2,
This lifting / lowering body locking means is a headrest device for an active headrest that is configured to lock and lift the lifting body, or to lock the medium means and to release the locking.
A headrest device for an active headrest according to claim 3,
A headrest device for an active headrest having a configuration in which an adjusting means for adjusting the length of the medium means is provided at an intermediate portion of the medium means.

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