JP4948066B2 - 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 in the event of an impact (collision). In this collision, the head and the head The headrest that protects the neck is moved upward (raised) and tilted forward (tilted forward), and this rise and forward can be achieved at high speed, avoiding neck injury and whiplash The present invention relates to a headrest device for an active headrest that aims to achieve the above.

  As is well known, the evolution of quality required for automobiles (vehicles) changes in the order of emissions → horsepower → fuel consumption → safety → silence → riding comfort, and at the same time responds to various needs of people. 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 desired for this headrest is that the headrest can surely play a role in such an emergency from the standpoint of suppressing the generation of rattling noise, frequent accidents and / or diversification of collisions. It is an essential requirement.

  However, this headrest eliminates contact with a person's head in order to eliminate passengers' desires and 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 known that such a separation of the headrest causes unexpected problems during an impact and / or a collision. For example, for safe driving and comfortable driving, the back is in contact with the seat back, so the back is protected in the event of an impact, but the head is not protected from being away from the headrest. The reason is considered as follows. That is, at the time of this collision, the head is brought upward in a vector and the neck is stretched, for example, from minor damage such as whiplash symptoms, to neck injury and / or shearing, Extremely heavy conditions occur, causing great damage to people.

  As described above, various inventions have been proposed to avoid neck injury, whiplash, etc. that occur at the time of a collision, but the headrest device for an active headrest that rises a predetermined length instantly and tilts forward. Is not necessarily considered sufficient. And the following literature is mentioned as a headrest apparatus for normal active headrests.

  Document (1) is “Automobile Seat” of Japanese Patent Laid-Open No. 2000-219069, and the outline thereof is that an upper pipe provided on each seat back frame and a headrest stay attached to the upper pipe can be inserted and removed. And a pipe frame to be fixed, a headrest support frame for tilting the pipe frame forward, and a pressure receiving portion provided on a seat back frame for tilting the headrest support frame, and the pressure receiving portion is pressed. Thus, the seat back is raised and tilted forward through the movement of the headrest support frame and the pipe frame, and the headrest moves forward by a large distance with respect to the amount of movement of the pressure receiving part due to the rearward movement of the upper body of the occupant during the rear-end collision It is intended to move and achieve this effect with a simple configuration.

  Document (2) is a “car seat” disclosed in Japanese Patent Application Laid-Open No. 2000-21114. The outline thereof is that a headrest support frame mounted with a headrest is fixed to an upper end portion of a lever link mechanism mounted on a seatback frame, This lever-link mechanism is a lever that swings up and down in conjunction with a pressure receiving part that moves under the load applied from the front of the seat back, and its lower end is pivotally supported by the lever, and its upper end is fixed to the headrest support frame. The first link and both ends of the first link and the second link pivotally supported by the seat back frame increase the amount of movement of the pressure receiving portion and move the headrest support frame obliquely forward and upward. The headrest is tilted forward, and the headrest is moved diagonally forward and upward, thereby avoiding the harmful effects caused by the rising of the head.

  Reference (3) is a “vehicle seat” disclosed in Japanese Patent Application Laid-Open No. 11-34708. The outline thereof is that two load receiving members including an upper load receiving member and a lower load receiving member are arranged inside the seat back. And a link mechanism that operates according to the amount of movement of the load receiving member is provided, and the headrest is raised in accordance with the amount of movement of the load receiving member. The link mechanism is connected to the first link arm and the first link arm. Intended to secure the headrest ascending stroke amount in a small space and to move the headrest to the front side by avoiding the harmful effects caused by the head ascending by the cooperative operation of the second link arm and the third link arm. To do.

JP2000-219069 JP2000-2111410A JP-A-11-34708

  Since the document (1), as a general rule, only intends to tilt forward, there is a problem that lacks consideration for head elevation (neck elongation).

  References (2) and (3) are configurations that aim to raise the headrest forward, and are not a configuration that actively works to distinguish the headrest from rising and leaning forward, but the rising distance and the rising speed. There is room for improvement. Further, when taking into consideration a rise and / or descent with good responsiveness, it is not always considered sufficient, and there is room for improvement.

  In addition, there is no active headrest that accurately corresponds to almost all conditions at the time of impact regardless of the body shape of the occupant intended by the present invention or the sitting posture. The present situation is that there are no inventions and / or products intended to ensure the safety and security of passengers or the comfort of driving and driving through the active headrest.

  In view of the above, an object of the present invention is to achieve the following “1” to “5”.

  “1” First, the present invention is an active headrest which is composed of an elevating device embedded in a seat back and configured to raise and forward and provided on a frame of the seat back and a driving main device. The headrest that protects the head and / or neck before raising the head and / or the neck can be raised and tilted at a high speed (before the head rises after a collision, A headrest device for an active headrest having a configuration capable of avoiding cervical injury, avoiding whiplash, etc. as a configuration in which the headrest is in a predetermined ascent and forward tilt state (hereinafter the same) is proposed.

  “2” In principle, 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 responsiveness can be increased. -Intended to ensure descent and forward tilt, etc., and to propose a headrest device for an active headrest that is configured to be practically used.

  “3” In the present invention, 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 in accordance with a command of the driving main device. A headrest device for an active headrest is proposed in which the headrest is lifted and tilted forward by the action of the device, and can be lifted and tilted instantaneously (at high speed).

  “4” Regardless of the body type of the passenger (height, weight, weight, etc.) or seating posture, in other words, the head, neck, etc. will respond appropriately under all conditions. We propose a headrest device for active headrests that is capable of protecting the vehicle and ensuring safety and security, or ensuring driving and driving comfort.

  “5” For example, in the case of various sensors such as a collision sensor, the conventional problem can be eliminated by raising the headrest and tilting forward even in a situation where the passenger cannot predict by the function of this sensor. A headrest device for an active headrest with a configuration is proposed.

  The invention of claim 1 is intended to achieve the objects described in the above-mentioned “1” to “4”.

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 headrest device
Consists of a headrest bracket provided on a frame and / or intermediate member of a vehicle seat back, a headrest support inserted into the headrest bracket, a headrest stay loosely fitted into the headrest support, and a headrest provided at the headrest stay And
Also, the ascending / forward tilting mechanism
A lifting device provided on the frame and / or intermediate member for raising and lowering the headrest stay, a driving main device provided on the frame and / or intermediate member for carrying the movement of the lifting device, and one of the driving main devices. A medium means constituted by a wire or a suspension member that is linked and the other is linked to the lifting device, and a frame and / or an intermediate member that locks the medium means and that can be released. With the provided locking device,
By this operation of the driving main unit, the locking of the locking device to the medium means is released, the medium means is tensioned to operate the lifting device, and the operation of the lifting device causes the headrest to rise and move forward. It is a headrest device for an active headrest configured to be inclined.

  The invention of claim 2 is intended to achieve the object of claim 1 and to provide an elevating device in a headrest device for a headrest stay that is optimal for achieving the object.

Claim 2 is a headrest device for an active headrest according to claim 1,
The lifting device provided on the seat back includes a cylinder provided on the frame and / or the intermediate member, a moving body provided opposite to the cylinder, a moving piece provided movably on the cylinder, A first spring provided between the moving piece and the moving body, and a second spring provided opposite the first spring and provided between the moving body and the frame and / or the intermediate member, The headrest device for an active headrest is configured with a lifting rod locked to the end of the movable body, and the moving piece of the lifting device is configured to be movable by releasing the locking of the locking device. is there.

  The invention of claim 3 is intended to achieve the object of claim 1 and to provide an elevating device in a headrest device for a headrest stay that is optimal for achieving the object.

Claim 3 is a headrest device for an active headrest according to claim 1,
The elevating device provided on the seat back is formed by forming a series of moving pieces and a moving body constituting the elevating device via a medium means constituted by a connecting wire or a suspension member. It is a headrest device for an active headrest configured to operate in series.

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

Claim 4 is a headrest device for an active headrest according to claim 1,
The drive main device is provided with a receiving portion provided with an uneven portion integrally provided on the frame and / or the intermediate member, and the unevenness provided so as to be movably locked to the receiving portion and fitted to the receiving portion. A movable fitting portion provided with a portion, a wire inserted between the receiving portion and the movable fitting portion , or a medium means constituted by a suspension member ,
The lifting device includes a guide plate having an inclined long hole provided in the frame and / or the intermediate member, a movable plate that moves following the guide plate, a lifting rod connected to the movable plate, and the lifting rod is free to play. It is a headrest device for an active headrest that is configured by a sheath tube that is fitted and pivotally supported on a bracket of the guide plate, and a spring that is fitted to the elevating rod and has one end fixed to the sheath tube.

  The invention of claim 5 is intended to achieve the object of claim 4 and to provide the receiving part and the movable fitting part of the drive main unit in the headrest device for the headrest stay that is optimal for achieving this object. To do.

Claim 5 is a headrest device for an active headrest according to claim 4,
A claw portion provided on the arm piece of the movable fitting portion is inserted and locked into a long hole provided in the flat portion of the receiving portion constituting the drive main unit, and the movable fitting portion is fixed to the flat portion of the receiving portion. A headrest device for an active headrest that is configured to be movable by being guided by the head.

  The invention of claim 6 is intended to achieve the object of claim 1 and to provide a drive main body device in a headrest device for a headrest stay that is optimal for achieving the object.

Claim 6 is a headrest device for an active headrest according to claim 1,
A bending bracket portion integrally provided on the frame and / or the intermediate member, a support shaft provided on the bending bracket portion, and a substantially V-shape movably pivoted on the support shaft. And a fourth spring provided on the frame and / or the intermediate member, which controls the return of the movable body and maintenance of the current state, and a wire on the other end of the movable body. Or a headrest device for an active headrest configured to lock the medium means constituted by a suspension member .

  The invention of claim 7 is intended to achieve the object of claim 1 and to provide a drive main body device in a headrest device for a headrest stay that is optimal for achieving the object.

Claim 7 is a headrest device for an active headrest according to claim 1,
The drive main unit is composed of a pair of bulging bracket portion and bending bracket portion provided on the frame and / or intermediate member, and both free ends supported by the bulging bracket portion, and a movable fulcrum on the bending bracket portion. A movable spring that has a substantially U-shape when viewed from the side, a support shaft that regulates a movable fulcrum portion of the movable spring, and a pivot that is pivotally supported by the support shaft, and its base end is locked to the movable spring. The movable plate and a pin that is movably inserted into the long hole of the movable plate, and a spring is provided between the pin and the support shaft that is passed to the bending bracket portion, and a wire is attached to the pin . Alternatively, it is a headrest device for an active headrest that is configured to lock the medium means constituted by the suspension member .

  The invention of claim 8 is intended to achieve the object of claim 7 and to provide a drive main body device in a headrest device for a headrest stay that is optimal for achieving this object.

Claim 8 is a headrest device for an active headrest according to claim 7,
The bulging bracket portion and the bent brackets of the pair constituting the driving main unit, a headrest device for an active headrest has a configuration of providing the movable plate and the spring in pairs.

  The invention of claim 9 is intended to achieve the object of claim 7 and to provide a drive main body device in a headrest device for a headrest stay that is optimal for achieving this object.

Claim 9 is a headrest device for an active headrest according to claim 7,
This is a headrest device for an active headrest in which a locking portion is formed in a long hole provided in a movable plate that constitutes the drive main device, and a pin is detachably provided in the locking portion.

  The invention of claim 10 is intended to achieve the object of claim 1 and to provide medium means in a headrest device for a headrest stay that is optimal for achieving this object.

Claim 10 is a headrest device for an active headrest according to claim 1,
This is a headrest device for an active headrest in which the medium means constituted by the wire or the suspension member is constituted by two, and the drive main body device is provided as a pair following 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,
Headrest device
A headrest bracket provided on a frame and / or an intermediate member of a vehicle seat back, 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 ascending / forward tilt mechanism
Elevating device provided on the frame and / or intermediate member for raising and lowering the headrest stay, a driving main device provided on the frame and / or intermediate member for supporting the movement of the elevating device, one connected to the driving main device, and the other Medium means constituted by a wire or suspension member connected to the lifting device, and a locking device provided on the frame and / or the intermediate member that can lock the medium means and release the locking. And
The operation of the drive main unit releases the locking of the medium device by the locking device, the medium device is tensioned to operate the lifting device, and the headrest is lifted and tilted forward by the operation of the lifting device. This is a headrest device for an active headrest.

  Therefore, claim 1 has the following characteristics.

  “1” The present invention is an active headrest that is composed of an elevating device embedded in a seat back and controlling the ascending and forward tilting provided on the seat back frame and a driving main body. The headrest that protects the head and / or neck before ascending and / or extending the neck can be raised and tilted at high speed (the headrest is A headrest device for an active headrest having a configuration capable of avoiding neck injury, avoiding whiplash and the like as a configuration in a predetermined ascending and forward tilt state (hereinafter the same) may be proposed.

  “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 / fall and forward tilt can be achieved. It is possible to propose a headrest device for an active headrest that has a configuration that can be used practically.

  “3” In the present invention, 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 in accordance with a command of the driving main device. It is possible to propose a headrest device for an active headrest that has a configuration in which the headrest is lifted and tilted forward by the action of the device and can be lifted and tilted instantaneously (at high speed).

“4” Regardless of the body type of the passenger (height, weight, weight, etc.) or seating posture, in other words, the head, neck, etc. will respond appropriately under all conditions. It is possible to propose a headrest device for an active headrest that is capable of protecting the vehicle and ensuring safety and security, or ensuring driving and driving comfort.

  “5” For example, in the case of various sensors such as a collision sensor, the conventional problem can be eliminated by raising the headrest and tilting forward even in a situation where the passenger cannot predict by the function of this sensor. A headrest device for an active headrest having a configuration can be proposed.

Invention of Claim 2 is the headrest apparatus for active headrests of Claim 1, Comprising:
The lifting device provided on the seat back includes a cylinder provided on the frame and / or the intermediate member, a moving object provided opposite to the cylinder, a moving piece movably provided on the cylinder, and a moving piece. A first spring provided between the body, a second spring opposed to the first spring and provided between the moving body and the frame and / or the intermediate member, and an end of the moving body. The moving head of the elevating device is a headrest device for an active headrest that is configured to be movable by releasing the locking of the locking device.

  Accordingly, the second aspect has the characteristics that the object of the first aspect can be achieved, and the lifting device in the headrest device for the headrest stay optimal for achieving the object can be provided.

Invention of Claim 3 is the headrest apparatus for active headrests of Claim 1, Comprising:
The elevating device provided on the seat back is formed in a series of moving pieces and moving bodies constituting the elevating device through a medium means constituted by a connecting wire or a suspension member, and in a series through the medium means. It is a headrest device for an active headrest configured to operate.

  Accordingly, the third aspect has the characteristics that the object of the first aspect can be achieved, and the lifting device in the headrest device for the headrest stay optimal for achieving the object can be provided.

Invention of Claim 4 is the headrest apparatus for active headrests of Claim 1, Comprising:
The drive main unit is provided with a receiving portion provided with a concavo-convex portion integrally provided on the frame and / or the intermediate member, and a convex concave portion provided to be movably locked to the receiving portion and fitted to the receiving portion. It is composed of a movable fitting part and a medium inserted by a wire inserted between the receiving part and the movable fitting part , or a suspension member ,
The lifting device includes a guide plate having an inclined long hole provided in the frame and / or the intermediate member, a movable plate that moves following the guide plate, a lifting rod linked to the movable plate, and a lifting rod that is loosely fitted. It is a headrest device for an active headrest composed of a sheath tube pivotally supported by a bracket of a guide plate and a spring fitted to an elevating rod and having one end fixed to the sheath tube.

  Accordingly, the fourth aspect has the characteristics that the object of the first aspect can be achieved, and the drive main body apparatus in the headrest apparatus for the headrest stay that is optimal for achieving the object can be provided.

The invention of claim 5 is a headrest device for an active headrest according to claim 4,
The claw portion provided on the arm piece of the movable fitting portion is inserted and locked into the long hole provided in the flat portion of the receiving portion constituting the drive main unit, and the movable fitting portion is guided to the flat portion of the receiving portion. This is a headrest device for an active headrest that is configured to be movable.

  Therefore, claim 5 can achieve the object of claim 4, and can provide the receiving part and the movable fitting part of the drive main body device in the headrest device for the headrest stay optimal for achieving this object. Have.

Invention of Claim 6 is the headrest apparatus for active headrests of Claim 1, Comprising:
A bending bracket portion integrally provided on the frame and / or the intermediate member, a support shaft provided on the bending bracket portion, and a substantially V-shaped movable body pivotably attached to the support shaft. And a fourth spring provided on one end of the movable body and the frame and / or the intermediate member for controlling the return of the movable body and maintaining the current state , and a wire or a suspension member on the other end of the movable body. This is a headrest device for an active headrest configured to lock the medium means .

  Accordingly, the sixth aspect has the characteristics that the object of the first aspect can be achieved, and the drive main body device in the headrest device for the headrest stay that is optimal for achieving the object can be provided.

The invention of claim 7 is a headrest device for an active headrest according to claim 1,
The drive main unit is supported by a pair of bulging brackets and folding brackets provided on the frame and / or intermediate member, and both free ends are supported by the bulging brackets, and a movable fulcrum is supported by the folding brackets. A movable spring that has a generally U-shape when viewed from the side, a support shaft that regulates the movable fulcrum of the movable spring, a movable plate that is pivotally supported by the support shaft and has its base end locked to the movable spring, and movable A medium means constituted by a pin or a suspension member provided with a spring between the pin and the support shaft passed to the bent bracket portion. It is a headrest device for an active headrest configured to be locked.

  Accordingly, the seventh aspect has the characteristics that the object of the first aspect can be achieved, and the drive main body device in the headrest device for the headrest stay that is optimal for achieving the object can be provided.

The invention of claim 8 is a headrest device for an active headrest according to claim 7,
It is a headrest device for an active headrest in which a spring and a movable plate are provided as a pair on a pair of bulging bracket portions and a bending bracket portion constituting a drive main body device.

  Accordingly, the eighth aspect has the characteristics that the object of the seventh aspect can be achieved, and that the drive main body apparatus in the headrest apparatus for the headrest stay that is optimal for achieving the object can be provided.

The invention of claim 9 is a headrest device for an active headrest according to claim 7,
This is a headrest device for an active headrest in which a locking portion is formed in a long hole provided in a movable plate constituting the driving main device, and a pin is detachably provided on the locking portion.

  Accordingly, the ninth aspect has the characteristics that the object of the seventh aspect can be achieved, and the drive main body device in the headrest device for the headrest stay that is optimal for achieving the object can be provided.

The invention of claim 10 is a headrest device for an active headrest according to claim 1,
This is a headrest device for an active headrest in which a medium means constituted by a wire or a suspension member is constituted by two, and a drive main body device is provided as a pair following the medium means .

  Accordingly, the tenth aspect has the characteristics that the object of the first aspect can be achieved, and the medium means in the headrest device for the headrest stay optimal for achieving the object can be provided.

  An example of the present invention will be described.

  Referring to the drawings, FIG. 1-1 is an overall scale side view showing an example of a seat back of a vehicle (automobile) provided with a first draft seat, FIG. 1-2 is a cross-sectional view of FIG. FIG. 1-3 is an overall scale side view showing an example of a seat back of a vehicle provided with a second proposal seat (a configuration in which convex portions are substantially provided around the seat), and FIG. 1-5 is an overall scale side view showing an example of a seat back of a vehicle provided with a seat of the third plan (a configuration in which convex portions are provided in the longitudinal direction of the seat), and FIGS. 1-5 is a cross-sectional view of FIG. 1-5, and FIG. 1-7 is an overall scale side view showing an example of a vehicle seat back provided with the fourth seat (a configuration in which a pair of convex portions are provided in the longitudinal direction of the seat). 1-8 is a transverse cross-sectional view of FIG. 1-7, and FIG. 1-9 is a schematic diagram of a vehicle equipped with a fifth draft sheet (a configuration in which substantially the entire length of the sheet is a convex portion). Overall scale side view showing an example of a-back, Figure 1-10 is a cross-sectional view of Figure 1-9.

  FIG. 2A is an overall front view of a configuration suitable for each seat of the first to fifth plans conceptually showing the relationship between the seat back indicated by the phantom line and the active headrest, and FIG. FIG. 4 is an overall front view of a configuration suitable for each seat of the first to fifth plans conceptually showing a relationship between a seat back indicated by virtual lines and an active headrest.

  FIG. 3 is an enlarged front view of the lifting device for the active headrest shown in FIGS. 2-1 and 2-2.

  FIG. 4-1 is a schematic side view showing the relationship between the active headrest and the head in the normal state of the first embodiment, and FIG. 4-2 shows the relationship between the active headrest and the head in the impact of the first embodiment. It is a side surface schematic diagram.

  FIG. 5A is a perspective view of the receiving portion of the first plan provided integrally with the frame, for example, in the drive main unit of the first embodiment. In each seat of the first to fifth plans, FIG. It is a structure that can be adopted (the same applies hereinafter). FIG. 5-2 is a perspective view showing an exploded state of the first receiving portion and the first movable movable fitting portion of the drive main unit of the first embodiment, and FIG. 5-3 is the first embodiment. FIG. 5-4 is a perspective view after the operation of the drive main unit of the first embodiment, and FIG. 5-5 is another view of FIG. 5-1. 6-1 is a perspective view showing an example, FIG. 6-1 is another example of the receiving portion of the first plan shown in FIG. 5-1, and is a perspective view showing a configuration in which the side surface is reinforced, and FIG. FIG. 6 is a perspective view showing an example of a receiving portion of the second plan shown in FIG.

  FIG. 7-1 is an enlarged side view of the main part before the operation of the drive main unit of the second embodiment, FIG. 7-2 is an enlarged side view of the main part after the operation of the drive main unit of the second embodiment, and FIG. Fig. 7-1 is an enlarged front view of the state shown in Fig. 7-1 to Fig. 7-2 with the other end attached, Fig. 7-4 is a side view of Fig. 7-3, and Fig. 8-1 is Fig. 7-1 to Fig. 7-. FIG. 8-2 is an enlarged side view showing an attached state of one end of the spring of FIG. 8-1, and FIG. FIG. 9B is a schematic plan view showing a state before the movable body of the driving main body apparatus of the second embodiment shown in FIGS. FIG. 9-3 is a schematic plan view showing a state immediately before the body is fitted into the receiving part, FIG. 9-3 is a schematic plan view showing a state in which the movable body of FIG. 9-1 has been fitted into the receiving part, and FIG. Allowable on support shaft and bulge Schematic side view of a main part showing the relationship between sex tongue, FIG. 9-5 is a cross-sectional view of Figure 9-4.

  FIG. 10 is a schematic plan view in which movable bodies are provided in pairs in the drive main unit of the second embodiment shown in FIGS. 7-1 and 7-2.

  FIG. 11-1 is a driving main device of the third embodiment, and a schematic front view showing a state after the movable spring is locked to the bulging bracket portion, and FIG. FIG. 12-1 is a front schematic view showing a process of locking to the bulging bracket portion in a state compressed in the width direction, and FIG. 12-1 is a state where the movable plate is stopped and the movable spring is in a normal state (relaxed state). FIG. 12-2 is a schematic side view showing a state where the movable plate is pressed and the movable spring is in an impact state (tensed state), and FIG. 13-1 is a driving subject of the third embodiment. FIG. 13-2 is an enlarged side view of the main part showing another example of FIG. 13-1, and FIG. 14 is a view of the movable spring shown in FIG. It is the front schematic diagram which showed an example of the structure provided in FIG.

  FIG. 15 is an explanatory diagram showing the relationship between the spring, the load, and the lift stroke of the headrest, where the horizontal axis indicates the lift stroke and / or operating time of the headrest, and the vertical axis indicates the drive main unit, medium means, or lift The load applied to the device is shown.

  FIG. 16-1 shows the overall relationship of the wire, the locking member, the lifting device, etc., and is an enlarged schematic view of the first plan with a part thereof omitted, and FIG. 16-2 shows the wire and the locking device. FIG. 16-3 is an enlarged schematic view of a main part of a conventional example in which the relationship between the member and the moving piece is partially omitted and the directionality of the locking device is shown on one side. FIG. FIG. 16-4 is a partially enlarged view of the relationship between the wire, the locking member, the moving piece, and the like. Fig. 16-5 is an enlarged schematic view of another example of Fig. 16-1, and Fig. 16-5 is an enlarged schematic view of the main part of the third plan showing the directivity of the locking device.

  FIG. 17 is an explanatory diagram showing the relationship between the first and second springs and the load, where the horizontal axis indicates the stroke of the moving body, and the vertical axis indicates the load that lowers the headrest support downward. FIG. 18 is an explanatory diagram showing the relationship between the pressing of the first and second springs at the time of collision, the pressing of the waist, and the combination of the two, and the headrest rising stroke, and the horizontal axis is the operating time. The vertical axis shows the rising stroke of the headrest.

  FIG. 19 is a schematic diagram for explaining the relationship between the seat back, the headrest, and the load and distance when moving.

  FIG. 20 is a diagram showing an example in which the lift distance / lift speed of the headrest can be improved by a combination of a spring and medium means (wire).

  FIG. 21 is a scale side view showing the entire automobile, and FIG. 22 is a schematic view showing a situation where a child is seated on the seat and the drive main unit is pushed by mistake.

  First, a basic configuration common to each embodiment will be described. The present invention is an active headrest B mounted on a seatback A1 constituting a seat A of an automobile, and the active headrest B is a seatback A1. A metal frame 1 embedded in the frame 1, a drive main unit C provided at the lower end of the frame 1, connected to the drive main unit C, and provided from below to above the frame 1 (seat back A 1). Medium means D, a lifting device E connected to the medium means D and provided above the frame 1, and a locking mechanism for locking (e.g., stopping) and / or releasing the lifting device E. The device G, and a collision sensor H that controls the operation of the locking device G provided as necessary, and the lifting device E, the locking device G, and the medium means D can be lifted and tilted forward. Dressed headrest device I provided in the frame 1 with a (described later) as a main component. Incidentally, the collision sensor H is provided at an appropriate position of the vehicle.

  “I” First, the drive main unit C will be described separately.

  In the example of FIGS. 2-1 to 6-2, the frame 1 and / or the intermediate member 100 (this intermediate member 100 is a small size having a width approximately half the width of the frame 1). To achieve a reduction in size, weight, etc. (hereinafter the same) (referred to as “frame 1”), a substantially box-shaped receiving portion 3 provided with a plurality of long holes 2, and the receiving portion 3. The guide recess 300, the projection 301 provided, and the receiving portion 3 are movably fitted, and the claw portion 402 is inserted and locked in the elongated hole 2 and is movable in a generally box-shaped manner. The fitting portion 4 includes a convex portion 400 and a guide concave portion 401 provided on the movable fitting portion 4. The receiving portion 3 is provided with a flat portion 302 for forming the long hole 2 on the upper and lower sides. The lower flat portion 302 functions as a receiver for the movable fitting portion 4. Further, the claw portion 402 is inserted into the long hole 2 so as to bend the arm piece 403 of the movable fitting portion 4 and is locked to both ends of the long hole 2 through the reaction force. Since it is such a configuration, it can be easily assembled through means such as a robot, and has features such as being useful, contributing to simplification of work or cost reduction.

  Further, the guide recesses 300 and the projections 301 provided in the receiving portion 3 are fitted with the projections 400 and the guide recesses 401 of the movable fitting portion 4, respectively. Hold by locking with the part. And through this fitting, it is between the guide recessed part 300 and the convex part 301 of the said receiving part 3, and the convex part 400 and the guide recessed part 401 of the movable fitting part 4, and is the long hole 2a of the flame | frame 1. And the medium means D provided via the notch 404 of the movable fitting portion 4 is tensioned or relaxed (described later). That is, the moving piece and / or the moving body (described later) of the lifting device E is held at the ascending limit by this tension, and the lifting device E is held at the descending limit by being relaxed. Therefore, at the rising limit of the lifting device E, the headrest (described later) of the headrest device I is lifted and tilted forward, and at the lowering limit of the lifting device E, the headrest is lowered in the normal use state (after rising) ) And vertical installation (after tilting forward).

  5-3 shows the relaxed state of the medium means D, and FIG. 5-4 shows the tensioned state of the medium means D. In the tension state of the medium means D in FIG. 5-4, the guide concave portion 300 and the convex portion 301 of the receiving portion 3 and the convex portion 400 and the guide concave portion 401 of the movable fitting portion 4 are separated from each other. In the tension state of the medium means D at -4, the guide concave portion 300 and the convex portion 301 of the receiving portion 3 and the convex portion 400 and the guide concave portion 401 of the movable fitting portion 4 are in close contact with each other. In this close contact state, the movable fitting portion 4 is pressed in the direction of the arrow <A> during a so-called impact, and the medium means D is moved to the arrow <B> via the fitting of the movable fitting portion 4 and the receiving portion 3. In this direction, the medium means D is secured for the moving length (movement distance) in the direction of arrow <b>. Thereby, as described above, the moving piece and / or the moving body (described later) of the lifting device E is raised. It is a structure that establishes the rise and forward tilt of the headrest (described later) through this rise.

  And in the above example of illustration, the receiving part 3 and the movable fitting part 4 were comprised independently in the flame | frame 1, However, A structure provided with two or more like FIG. 6-2 is also possible. Further, the movable fitting portion 4 can be moved via a pressing plate and a pressure receiving plate (not shown).

  In this example, the receiving unit 3 is configured integrally with the frame 1 and is intended to improve economy and / or accuracy, improve assembly, and automate. However, the receiving unit 3 is created individually, A structure that is attached to the frame 1 or the like is also possible. In addition, this drive main unit C adopts a structure having a width of about ¼ of the width of the frame 1, thereby achieving downsizing and / or weight reduction / simplification of the apparatus, or substantially It is intended to be able to be installed in a vehicle type (also considered in other devices). Even if there is a change in the pressing direction, a reliable movement of the medium means D can be guaranteed by providing a pressing plate or the like (the medium means D is a plurality of examples). Further, although not shown, the receiving portion 3 and the movable fitting portion 4 may have a set of structures. In this example, the medium means D is single (one).

  In the figure, reference numeral 303 denotes a reinforcing portion. In addition, the flat portion 302 is intended to reinforce the frame 1 and ensure a long movement stroke of the movable fitting portion 4, and to easily move the movable fitting portion 4 and increase the movement distance of the medium means D. It is also possible to make it wide.

  Further, guide grooves 305 and 405 of the medium means D are provided in the convex portion 301 of the receiving portion 3 or the convex portion 400 of the movable fitting portion 4 and the guide concave portion 401, etc., so as to ensure the reliable movement of the medium means D. Is desirable.

  ◎ In the example of FIGS. 7-1 to 10-2, a support shaft 5 is provided via a bulging portion 1a provided on the frame 1 (which is versatile if used also as the receiving portion 3). A substantially V-shaped movable body 6 is fixed to 5. Then, one end 7 a of the spring 7 is supported on one end 6 a (free end) of the movable body 6. The medium means D is attached to the other end 6b (movable fulcrum) of the movable body 6. The other end 7 b of the spring 7 is engaged with a hole 102 a of a mounting rib piece 102 formed by press molding on the inner surface 1 b of the frame 1. Therefore, in this example, from the state before the operation of FIG. 7-1 to the state after the operation of FIG. 7-2 due to an impact, the moving piece and / or the movement of the lifting device E through the tension of the medium means D Since the body rises and the headrest can be lifted and tilted forward through this rise, the operation will be explained. First, the impact causes the movable body 6 and the spring 7 to move in the direction indicated by the arrow <g> about the support shaft 5. It is movable. With this movement, the one end 6a of the movable body 6 moves along an arc locus, pulls the medium means D in the direction of the arrow <B>, secures the movement distance, and the headrest can be lifted and tilted forward. When the movable body 6 is movable, the spring 7 bends from one end 7a of the spring 7 to the other end 7b locked to the inner surface 1b of the bulging portion 1a, and the spring 7 is folded into a substantially U shape ( It is compressed as shown in FIG. The reaction force from the compression of the spring 7 causes the movable body 6 to move in the opposite direction, the moving means of the medium means D and the lifting device E and / or the moving body to descend, and the headrest to descend, that is, Use for return. As shown in FIG. 8B, one end 7a of the spring 7 is configured to be able to be locked to the attachment portion provided on the movable body 6 with one touch. As an example, as shown in FIGS. 9-1 to 9-3, the support shaft 5 is provided on a pair of bulged portions 1a formed by press working on the frame 1. At this time, the support shaft 5 is In order to enable one-touch assembly to the recess 101 or the hole established in the bulging portion 1a, the support shaft 5 is bent and pressed into the bulging portion 1a. Further, as shown in FIGS. 7-3 and 7-4, the support shaft 5 can be engaged with the recess 103a or the hole of the flexible tongue 103 provided in the frame 1. In addition, the groove part 1c can be provided in the bulging part 1a, and it can also be utilized as a guide of the both ends of the support shaft 5. FIG. FIG. 10 shows a configuration in which the movable bodies 6 are provided in pairs, and the basic mechanism is similar to the above example.

  In the example of FIGS. 11-1 to 15, the movable spring 8 is provided on the bulging bracket portion 1 e provided on the frame 1, and the movable spring 8 is transferred to the bending bracket portion 1 f provided on the frame 1. The configuration is such that it straddles the shaft 10. The movable plate 12 is supported by the movable spring 8 and the support shaft 10. The movable plate 12 is configured to move with the support shaft 10 as a fulcrum. The movable plate 12 is provided in pairs, and a pin 13 is inserted into a long hole 1200 provided in the movable plate 12, and the medium means D is locked to the pin 13. Then, a spring 15 is suspended between the pin 13 and the support shaft 10, and when the pin 13 is disengaged from the locking portion 1200 a of the long hole 1200, the pin 13 is pulled downward. ing.

  The operation in this example will be described. When the free end of the movable spring 8 is pressed at the time of impact, the state shifts from FIG. 12-1 to FIG. 12-2. That is, the movable plate 12 moves in the arrow <d> with the support shaft 10 as a fulcrum. And the pin 13 latched by the latching | locking part 1200a of the long hole 1200 at the time of this movement is disengaged, and is pulled down by the reaction force of the spring 15 (it falls). The medium means D is pulled down by the lowering of the pin 13. By this pulling down, the moving piece and / or moving body of the medium means D and the lifting device E is lowered, and the headrest is lowered and tilted forward. It should be noted that the tension of the movable plate 12 and the spring 15 and the return of the moving piece and / or the moving body of the medium means D and the lifting and lowering device E are performed by repulsion of the movable spring 8, and the headrest is pushed down (forced / A configuration performed by lowering using a mechanical device or the like is conceivable. FIG. 11-1 is a driving main device of the third embodiment, and a schematic front view showing a state after the movable spring 8 is locked to the bulging bracket portion 1e, and FIG. FIG. 5 is a schematic front view showing a process of locking the spring 8 to the bulging bracket portion 8 in a state where the spring 8 is compressed in the width direction of the frame 1, and proposes a configuration in which the movable spring 8 can be easily attached. 12A is a schematic side view of the movable spring 8 in a normal state (relaxed state) when the movable plate 12 is stopped, and FIG. 12B is a movable state when the movable plate 12 is pressed. FIG. 7 is a schematic side view showing a state in which the spring 8 is in an impact state (tensioned state). The pin 13 locked to the locking portion 1200a of the elongated hole 1200 is engaged and disengaged, and the reaction force of the spring 15 causes the medium means. D shows a state where it is pulled downward.

  Next, the lifting device E will be described with reference to FIGS. 2-1, 2-2, and 16-1.

  The structure includes a cylindrical body 20 provided on the frame 1, a moving body 21 provided on the frame 1 facing the cylindrical body 20 so as to be movable up and down, a branch arm 22 branched from the moving body 21, The movable piece 24 loosely fitted in the cylindrical portion 20a of the cylindrical body 20, the first spring 25 provided between the movable piece 24 and one concave portion 21a provided in the movable body 21, and the movable body 21 The second spring 26 provided between the other recess 21b and the frame 1 is a main configuration. The moving piece 24 and the moving body 21 are connected to each other via a stopper 31 provided at the free end 34a of the medium means D, and the moving piece 24 and the moving body 21 maintain a predetermined interval. And move in this state. Then, with the intention of optimizing the strokes and / or loads of the first and second springs 25 and 26, as shown in FIG. 17, a spring that can compensate for a delay at the time of impact and ensure a prescribed stroke. Select a constant and its wire diameter.

  Further, the operation is due to the simultaneous repulsion of the first and second springs 25 and 26 shown in FIG. 18 and the tension of the medium means D (referred to as the wire 34) (for example, the convex portion 301 of the receiving portion 3). Or a moving distance due to the fitting relationship of the movable fitting portion 4 with the convex portion 400), the moving piece 24 quickly moves on the cylindrical portion 20a of the cylindrical body 20, and the movable body 21 operates upward. The headrest stay I of the headrest device I is structured to be raised and tilted forward (indicated by X). In this example, it is desirable that the moving piece 24 and the moving body 21 are actuated to ensure that the headrest stay and / or the headrest rising distance is at least about 40 mm instantaneously. In the drawing, a delay time (A) is shown.

  Further, the wire 34 for operating the drive main unit C described above is configured so that the third tension means 27 (spring) shown in FIG. 16A is accommodated in the casing portion 20-1 attached to the cylindrical body 20, and By restricting the wire 34 inserted into the casing portion 20-1 via the third tension means 27 and a bush described later, for example, the movement distance (tensile distance and tension level) of the wire 34 is reduced. , Added at the time of ascent, it is possible to supplement the ascending distance and shorten the time. In this example, the optimum rise and forward tilt shown in FIG. 18 can be achieved (indicated by Y). This example of Y is effective when excessive friction occurs in the headrest device I or the lifting device E under various conditions and / or configurations. There is a feature capable of surpassing the delay time (A).

  In FIG. 18, it is possible to raise and tilt forward from an arbitrary position as in the example indicated by the alternate long and short dash line shown in the delay time (b). For example, the unexpected behavior of the child shown in FIG. On the other hand, the drive main body device C is configured not to operate so that the headrest stay of the headrest device I can be prevented from rising and leaning forward (indicated by Z).

  As will be described later, the locking device G is released by the movement (downward movement) of the bush having the inclined surface and the concave portion, and the movement of the moving piece 24 and the wire 34 is guaranteed. By adopting the third tensioning means 27, for example, it is possible to contribute to downsizing and simplification of the structure of the drive main unit C. The bush and the wire 34 are tightened via the stopper 31 to ensure the lowering of the bush. Further, the upper limit of the third tension means 27 is regulated by the stopper 31.

  In addition, a lifting / lowering rod 28 that lifts and lowers a headrest support of a headrest device I described later is pivotally attached to the branch arm 22.

  “Ha” Next, the locking device G will be described with reference to FIGS. 16-1 to 16-5.

  The structure is a locking member 29 such as a sphere or a protrusion that moves through the through hole 20 b of the cylindrical body 20, and the locking member 29 is engaged with and disengaged from the locking recess 24 a of the moving piece 24. With this locking, the moving piece 24 is stopped at the lower limit, and the moving piece 24 is lifted and / or lowered by detachment. In addition, the bush 30 for preventing the locking member 29 from being pressed or prevented from coming off is supported in the through hole 20 b of the cylindrical body 20.

  Further, the locking member 29 is locked to the locking recess 24a of the moving piece 24, and the moving piece 24 is stopped at the lower limit. Further, the moving piece 24 is lifted and / or lowered by the removal. Thus, the wire 34 is structured to be tensioned and relaxed. An inclined hole 30a (substantially square-shaped inclined hole) is formed in the bush 30 and the wire 34 is passed through the inclined hole 30a, so that the moving distance of the wire 34 is expanded. Further, the bush 30 can be automatically adjusted by using a combined structure of the spring 30b and the cover 30c, or an actuator (not shown), to achieve a more accurate and reliable operation. The bush 30 slides in the cavity of the fixing member such as the cylindrical body 20 and the frame 1 so that the tension level and / or the rising distance of the wire 34 can be changed. FIG. 16-5 is another example showing the locking relationship between the locking member 29 and the bush 30. The locking device G operates very accurately, and the headrest is lifted and tilted forward as described later. It is an example of a means for ensuring accuracy.

  “Ni” Next, the lifting device E will be described with reference to FIGS.

  The structure is provided through a guide plate 36 provided in the bracket 35 provided in the frame 1 and having a long hole 3600 inclined to the back side of the seat back A1, and a pin 3700 inserted into the long hole 3600 of the guide plate 36. The movable plate 37 is movably supported by the guide plate 36, and the sheath tube 38 is provided on the guide plate 36. And this raising / lowering apparatus E is comprised in the width | variety of about 1/2 of the width | variety of the flame | frame 1, and aims at size reduction and / or weight reduction and simplification of an apparatus. In the sheath tube 38, an elevating rod 28 provided on the branch arm 22 is slidably provided.

  In the figure, reference numeral 39 denotes a pulley on which the wire 34 is fitted.

  Further, when the base end 34b of the wire 34 is pulled up, the pin 3700 of the movable plate 37 moves in the elongated hole 3600, so that the movable plate 37 is tilted and pulled up, and the movable plate 37 (and Pulling up the branch arm 22) of the moving body 21 simultaneously pulls up the lifting rod 28 (arrow <c>). However, since the elevating rod 28 is loosely fitted to the sheath tube 38, the sheath tube 38 is moved to the front side of the seat back A1 (the sheath tube 38 is attached to the bracket 35 provided on the frame 1). Since it is pivotally supported, it tilts forward (by moving to the front side of the seat back A1) (arrow <d>). As described above, the active headrest B is lifted (arrow <E>) by the forward tilting of the lift rod 28 due to the lifting of the lifting rod 28 (arrow <c>) and / or the forward inclination of the sheath tube 38 (arrow <d>). ) And tilt forward (arrow <f>). The spring 42 is locked to the lifting rod 28 and the intermediate member 100 and the spring 42 is fitted to the lifting rod 28 so that the lifting rod 28 is returned via the spring 42. As a result, a headrest support and a headrest stay, which will be described later, are lowered. It should be noted that the return of the tensioned wire 34 is the reverse of the above-described movement and can be understood.

  “H” Next, the headrest device I will be described with reference to FIGS. 2-1, 2-2, 4-1, and 4-2.

This configuration includes a headrest bracket 51 supported on the frame 1, a headrest support 52 inserted into the headrest bracket 51, a headrest stay 53 provided on the headrest support 52, and a headrest 54 provided on the headrest stay 53. The headrest support 52 and / or the headrest 54 employs a general-purpose product so that parts can be shared and / or modularized. The headrest bracket 51 and the lifting / lowering rod 28 in the sheath tube 38 are integrated, and the headrest bracket 51 follows the lifting / lowering of the lifting / lowering rod 28. Further, the spring 42 has a feature useful for preventing the play of the headrest device I.

  As described above, as described above, the bifurcated arm 22 and / or the movable plate 37 are lifted through the repulsion of the first and second springs 25 and 26 and / or the tension of the wire 34. As this rises, the lifting rod 28 provided on the branch arm 22 rises. The headrest bracket 51 integrated with the lift rod 28 follows, and the headrest support 52 provided on the headrest bracket 51 rises. In addition, the movable plate 37 tilts forward during this ascent process. The headrest 54 can be lifted and tilted forward through the lift and forward tilt.

  In this example, the headrest 54 is lowered by pressing the headrest 54. For example, when the headrest 54 is lowered, first, the tension of the wire 34, the movable plate 37, the lifting rod 28, etc. , The locking of the locking device G to the moving piece 24, the removal of the movable fitting portion 4 from the receiving portion 3, and the like. By these operations, the entire headrest device I is restored.

FIG. 1-1 is an overall scale side view showing an example of a seat back of a vehicle (automobile) provided with the seat of the first plan. 1-2 is a cross-sectional view of FIG. 1-1. FIG. 1-3 is an overall scale side view showing an example of a seat back of a vehicle provided with the seat of the second plan (a configuration in which a convex portion is substantially provided around the seat). 1-4 is a cross-sectional view of FIG. 1-3. FIG. 1-5 is an overall scale side view showing an example of a seat back of a vehicle provided with a third proposal seat (a configuration in which a convex portion is provided in the longitudinal direction of the seat). 1-6 is a cross-sectional view of FIG. 1-5 FIG. 1-7 is an overall scale side view showing an example of a vehicle seat back provided with a fourth seat (a configuration in which a pair of protrusions are provided in the longitudinal direction of the seat). 1-8 is a cross-sectional view of FIG. 1-7 FIG. 1-9 is an overall scale side view showing an example of a seat back of a vehicle provided with the seat of the fifth plan (a configuration in which substantially the entire longitudinal direction of the seat is a convex portion). 1-10 is a cross-sectional view of FIG. 1-9 FIG. 2-1 is an overall front view of a configuration suitable for each seat of the first to fifth proposals, conceptually showing the relationship between the seat back indicated by virtual lines and the active headrest. FIG. 2-2 is an overall front view of a configuration suitable for each seat of the first to fifth plans conceptually showing the relationship between the seat back indicated by the phantom line and the active headrest. FIG. 3 is an enlarged front view of the lifting device for the active headrest shown in FIGS. FIG. 4-1 is a schematic side view showing the relationship between the active headrest and the head in the normal state of the first embodiment. FIG. 4-2 is a schematic side view showing the relationship between the active headrest and the head at the time of impact in the first embodiment. FIG. 5A is a perspective view of the receiving portion of the first plan provided integrally with the frame, for example, of the drive main unit of the first embodiment, and is adopted for each seat of the first to fifth plans. Possible structure illustration FIG. 5-2 is a perspective view showing an exploded state of the first receiving portion and the first movable fitting portion of the driving main body device of the first embodiment. FIG. 5-3 is a perspective view of a state before the operation in a state where the driving main body device of the first embodiment is assembled. FIG. 5-4 is a perspective view after the operation of the drive main unit of the first embodiment. 5-5 is a perspective view showing another example of FIG. FIG. 6A is another example of the receiving portion of the first plan shown in FIG. 5A, and is a perspective view showing a configuration in which the side surface is reinforced. FIG. 6-2 is an example of the receiving portion of the second proposal shown in FIG. 5-2, and is a perspective view showing a configuration in which the side surface is reinforced. FIG. 7-1 is an enlarged side view of a main part before the operation of the drive main unit of the second embodiment. FIG. 7-2 is an enlarged side view of the main part after the operation of the drive main unit of the second embodiment. FIG. 7-3 is an enlarged front view of the state in which the other end of the spring of FIGS. 7-1 to 7-2 is attached. 7-4 is a side view of FIG. 7-3. FIG. 8-1 is a perspective view of a part of the drive main unit of the second embodiment shown in FIGS. 7-1 and 7-2. FIG. 8-2 is an enlarged side view showing an attached state of one end of the spring of FIG. FIG. 9-1 is a schematic plan view showing a state before the movable body of the driving main body apparatus of the second embodiment shown in FIGS. 7-1 and 7-2 is fitted into the receiving portion. FIG. 9-2 is a schematic plan view showing a state immediately before the movable body of FIG. 9-1 is fitted into the receiving portion. FIG. 9-3 is a schematic plan view showing a state in which the movable body of FIG. FIG. 9-4 is a schematic side view of the main part showing the relationship between the support shaft and the flexible tongue provided on the bulging portion. 9-5 is a cross-sectional view of FIG. 9-4 FIG. 10 is a schematic plan view in which movable bodies are provided in pairs in the drive main unit of the second embodiment shown in FIGS. 7-1 and 7-2. FIG. 11A is a schematic diagram of the front of the driving main device of the third embodiment, showing a state after the movable spring is locked to the bulging bracket portion. FIG. 11-2 is a schematic front view showing a process of locking the movable spring to the bulging bracket portion in a state where the movable spring is compressed in the width direction of the frame. FIG. 12-1 is a schematic side view of the movable plate in a normal state (relaxed state) with the movable plate stopped. FIG. 12-2 is a schematic side view of the movable spring being pressed and the movable spring being in an impact state (tensed state). FIG. 13-1 is an enlarged side view of an essential part showing a long hole of the drive main unit of the third embodiment. FIG. 13-2 is an enlarged side view of a main part showing another example of FIG. FIG. 14 is a schematic front view showing an example of a configuration in which the movable spring shown in FIG. FIG. 15 is an explanatory diagram showing the relationship between the spring, the load, and the lift stroke of the headrest, where the horizontal axis indicates the lift stroke and / or operating time of the headrest, and the vertical axis indicates the drive main unit, medium means, or lift device. Figure showing such load FIG. 16-1 is an overall schematic view of the first plan, showing the entire relationship of the wire, the locking member, the lifting device, etc., with a part thereof omitted. FIG. 16-2 is an enlarged schematic view of the main part of the conventional example in which the relationship between the wire, the locking member, the moving piece, etc. is partially omitted and the directionality of the locking device is shown on one side. FIG. 16-3 is a partially enlarged schematic view of the main part of the second plan in which the relationship between the wire, the locking member, the moving piece, etc. is partially omitted and the directionality of the locking device is shown on one side FIG. 16-4 is an enlarged schematic view of the main part of the third plan in which the relationship between the wire, the locking member and the moving piece is partially omitted, and the directionality of the locking device is shown on one side. 16-5 is an enlarged schematic diagram showing another example of FIG. 16-1. FIG. 17 is an explanatory diagram showing the relationship between the first and second springs and the load. The horizontal axis shows the stroke of the moving body, and the vertical axis shows the load that lowers the headrest support downward. FIG. 18 is an explanatory diagram showing the relationship between the pressure of the first and second springs at the time of collision, the pressure of the waist, and the combination of the two, and the rising stroke of the headrest, the horizontal axis is the operating time, The vertical axis shows the headrest lift stroke FIG. 19 is a schematic diagram illustrating the relationship between the seat back, the headrest, and the load and distance when moving. FIG. 20 is a diagram showing an example in which the lift distance / lift speed of the headrest can be improved by combining the spring and the medium means (wire). FIG. 21 is a scale side view showing the entire automobile. FIG. 22 is a schematic diagram showing a situation where a child is seated on a seat and the drive main unit is pushed by mistake.

A Seat A1 Seatback B Active headrest C Drive main device D Medium means E Lifting device G Locking device H Collision sensor I Headrest device 1 Frame 1a Inflated portion 1b Inner surface 1c Groove portion 1e Inflated bracket portion 1f Bending bracket portion DESCRIPTION OF SYMBOLS 100 Intermediate member 101 Concave part 102 Mounting rib piece 102a Hole 103 Flexible tongue piece 103a Concave part 2 Long hole 2a Long hole 3 Receiving part 300 Guide recessed part 301 Convex part 302 Flat part 303 Reinforcement part 305 Guide groove 4 Movable fitting part 400 Convex part Part 401 guide recessed part 402 claw part 403 arm piece 404 notch 405 guide groove 5 support shaft 6 movable body 6a one end 6b other end 7 spring 7a one end 7b other end 8 movable spring 10 support shaft 12 movable plate 1200 long hole 1200a locking part 13 pin 15 spring DESCRIPTION OF SYMBOLS 20 Cylindrical body 20a Cylindrical part 20b Through-hole 20-1 Casing part 21 Moving body 21a One recessed part 21b The other recessed part 22 Branch arm 24 Moving piece 24a Locking recessed part 25 First spring 26 Second spring 27 Third tension Means 28 Lifting rod 29 Locking member 30 Bush 30a Inclined hole 30b Spring 30c Cover 31 Stopper 34 Wire 34a Free end 34b Base end 35 Bracket 36 Guide plate 3600 Long hole 37 Movable plate 3700 Pin 38 Sheath tube 39 Pulley 42 Spring 51 Headrest Bracket 52 Headrest support 53 Headrest stay 54 Headrest

Claims (10)

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 headrest device
Consists of a headrest bracket provided on a frame and / or intermediate member of a vehicle seat back, a headrest support inserted into the headrest bracket, a headrest stay loosely fitted into the headrest support, and a headrest provided at the headrest stay And
Also, the ascending / forward tilting mechanism
A lifting device provided on the frame and / or intermediate member for raising and lowering the headrest stay, a driving main device provided on the frame and / or intermediate member for carrying the movement of the lifting device, and one of the driving main devices. A medium means constituted by a wire or a suspension member that is linked and the other is linked to the lifting device, and a frame and / or an intermediate member that locks the medium means and that can be released. With the provided locking device,
By this operation of the driving main unit, the locking of the locking device to the medium means is released, the medium means is tensioned to operate the lifting device, and the operation of the lifting device causes the headrest to rise and move forward. A headrest device for an active headrest designed to tilt.
A headrest device for an active headrest according to claim 1,
The lifting device provided on the seat back includes a cylinder provided on the frame and / or the intermediate member, a moving body provided opposite to the cylinder, a moving piece provided movably on the cylinder, A first spring provided between the moving piece and the moving body, and a second spring provided opposite the first spring and provided between the moving body and the frame and / or the intermediate member, A headrest device for an active headrest that is configured by a lifting rod that is locked to an end of the movable body, and in which the moving piece of the lifting device can be moved by releasing the locking of the locking device.
A headrest device for an active headrest according to claim 1,
The elevating device provided on the seat back is formed by forming a series of moving pieces and a moving body constituting the elevating device via a medium means constituted by a connecting wire or a suspension member. A headrest device for active headrests configured to operate in series.
A headrest device for an active headrest according to claim 1,
The drive main device is provided with a receiving portion provided with an uneven portion integrally provided on the frame and / or the intermediate member, and the unevenness provided so as to be movably locked to the receiving portion and fitted to the receiving portion. A movable fitting portion provided with a portion, a wire inserted between the receiving portion and the movable fitting portion , or a medium means constituted by a suspension member ,
The lifting device includes a guide plate having an inclined long hole provided in the frame and / or the intermediate member, a movable plate that moves following the guide plate, a lifting rod connected to the movable plate, and the lifting rod is free to play. A headrest device for an active headrest comprising a sheath tube that is fitted and pivotally supported on a bracket of the guide plate, and a spring that is fitted to the elevating rod and has one end fixed to the sheath tube.
A headrest device for an active headrest according to claim 4,
A claw portion provided on the arm piece of the movable fitting portion is inserted and locked into a long hole provided in the flat portion of the receiving portion constituting the drive main unit, and the movable fitting portion is fixed to the flat portion of the receiving portion. A headrest device for an active headrest that is configured to be movable by being guided by the head.
A headrest device for an active headrest according to claim 1,
A bending bracket portion integrally provided on the frame and / or the intermediate member, a support shaft provided on the bending bracket portion, and a substantially V-shape movably pivoted on the support shaft. And a fourth spring provided on the frame and / or the intermediate member, which controls the return of the movable body and maintenance of the current state, and a wire on the other end of the movable body. Or a headrest device for an active headrest configured to lock the medium means formed of a suspension member .
A headrest device for an active headrest according to claim 1,
The drive main unit is composed of a pair of bulging bracket portion and bending bracket portion provided on the frame and / or intermediate member, and both free ends supported by the bulging bracket portion, and a movable fulcrum on the bending bracket portion. A movable spring that has a substantially U-shape when viewed from the side, a support shaft that regulates a movable fulcrum portion of the movable spring, and a pivot that is pivotally supported by the support shaft, and its base end is locked to the movable spring. The movable plate and a pin that is movably inserted into the long hole of the movable plate, and a spring is provided between the pin and the support shaft that is passed to the bending bracket portion, and a wire is attached to the pin . Alternatively , a headrest device for an active headrest configured to lock a medium means configured by a suspension member .
A headrest device for an active headrest according to claim 7,
The bulging bracket portion and the bent brackets of the pair constituting the driving principal device, headrest device for an active headrest has a configuration of providing the movable plate and the spring in pairs.
A headrest device for an active headrest according to claim 7,
A headrest device for an active headrest in which a locking portion is formed in a long hole provided in a movable plate constituting the drive main device, and a pin is detachably provided on the locking portion.
A headrest device for an active headrest according to claim 1,
A headrest device for an active headrest, in which the medium means constituted by the wire or the suspension member is constituted by two, and the drive main body device is provided in a pair following the medium means .

Images