JP6147596B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat provided with a lighting device capable of changing an irradiated portion.

Conventionally, a lighting device has been widely provided on the ceiling of a vehicle so that an occupant seated on the vehicle seat can be used. Further, Patent Document 1 describes that a lighting device is provided not on a vehicle ceiling but on a vehicle seat.
Patent Literature 1 describes an illumination device that can be stored in an armrest portion, and also describes that the illumination device includes a connecting portion that can freely change an irradiation direction.

Japanese Patent Laid-Open No. 10-241447

  Since the connection part of patent document 1 is the structure to which the wire which consists of a helical spring material which can be hold | maintained in a fixed shape is attached, it is described that the irradiation direction of an illuminating device can be changed freely. Such a structure has high durability against bending to a certain extent, but if the bending is continued excessively, the connecting portion may be exhausted and may be damaged early.

  The present invention has been made in view of the above-described points, and the problem to be solved by the present invention relates to a bendable lighting device provided in a vehicle seat, and relates to a lighting device caused by excessive bending. It is to suppress the breakage.

In order to solve the above problems, the present invention takes the following means.
First, the first invention is a vehicle seat provided with a lighting device capable of changing an irradiation direction by bending a bendable flexible tube, and the lighting device is disposed on a lighting fixture side. A cover portion, a second cover portion disposed on the seat body side, and a flexible tube connecting the first cover portion and the second cover portion, and an end portion of the first cover portion is formed of the flexible tube. The outside is covered with the end of the second cover connected to the flexible tube, and the lighting device is provided with a bending angle restriction mechanism that can regulate the bending angle of the flexible tube. bending a first brake mechanism for restricting the angle, e Bei the second brake mechanism which functions when the took unquenchable load is regulated by the first brake mechanism, the first brake The structure is composed of an inner surface of the end portion of the first cover portion and an outer surface of the end portion of the second cover portion that is in contact with the inner surface of the end portion of the first cover portion, and the second brake mechanism is a flexible tube. When the first cover part is inclined with respect to the second cover part by bending, the end part of the second cover part comes into contact with the end part of the first cover part .

According to the first aspect of the present invention, the vehicle seat includes the lighting device that can change the irradiation direction by bending the bendable flexible tube, and the lighting device is disposed on the lighting fixture side. , A second cover portion disposed on the seat body side, and a flexible tube connecting the first cover portion and the second cover portion, and an end portion of the first cover portion is located outside the flexible tube With the end of the second cover connected to the flexible tube, and the lighting device is provided with a bending angle regulating mechanism that can regulate the bending angle of the flexible tube. a first brake mechanism for restricting the bending angle, e Bei the second brake mechanism which functions when the took unquenchable load is regulated by the first brake mechanism, the first blade The mechanism is composed of an inner surface of the end portion of the first cover portion and an outer surface of the end portion of the second cover portion that is in contact with the inner surface of the end portion of the first cover portion. When the first cover portion is tilted with respect to the second cover portion and the end portion of the second cover portion comes into contact with the end portion of the first cover portion , the brake mechanism is multi-staged. Work. Therefore, it is possible to regulate the bending angle in a more stable state. In addition, since the first brake mechanism and the second brake mechanism regulate the bending angle when a part of the cover comes into contact with each other, the bending of the flexible tube has a simple structure without increasing the load on the flexible tube. It is possible to sufficiently regulate the angle.

According to a second aspect, in the first aspect, the lighting device includes a cylindrical first cover portion and a second cover portion, and the first cover portion and the second cover that form the first brake mechanism. The contact part of the part is not exposed so as to be visible .

According to the second aspect of the invention, the illumination device according to the first aspect of the invention includes a cylindrical first cover part and a second cover part, and the first cover part and the first cover part constituting the first brake mechanism. Since the contact part of 2 cover parts is not exposed so that visual recognition is possible, since the damage | wound which may be generated when the 1st brake mechanism works is invisible, it becomes possible to suppress deterioration of a product .

According to a third invention, in the first or second invention, the lighting device bends the flexible tube and tilts the first cover portion toward the inside of the seat with respect to the second cover portion. The end portion of the second cover portion gradually moves closer to the end portion on the inner side of the seat of the second cover portion and is displaced so as to be covered deeply, and the first brake mechanism is provided on the outer side of the seat of the first cover portion and the second cover portion. The second cover mechanism is provided only at the end, and the second brake mechanism abuts on the end of the first cover when the first cover is inclined inward of the seat with respect to the second cover. It is characterized by being comprised by the edge part inside the sheet | seat .

According to the third aspect of the invention, in the lighting device according to the first or second aspect , each brake mechanism is provided only at an appropriate position of each cover portion in consideration of the behavior of each cover portion when the lighting device is bent. It has a simple configuration. And the bending angle of a flexible tube can be controlled more reliably by making the 2nd brake mechanism function appropriately using the behavior of each cover part at the time of bending an illuminating device inside a sheet .

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible regarding the bendable illuminating device with which the vehicle seat was equipped, and it becomes possible to suppress the failure | damage of the illuminating device by generation | occurrence | production of excessive bending.

It is a front perspective view of the vehicle seat of the present invention. It is the figure which looked at the illuminating device applied to the vehicle seat of this invention from the downward direction. It is the figure which showed a part of internal structure of an illuminating device. It is a conceptual diagram showing the state which has fixed the both ends of the flexible tube of a straight state. ((A) represents the state before the flexible tube is bent, and (B) represents the state after the flexible tube is bent.) It is the figure which showed the state which covered the flexible tube with the cover. It is the figure which showed the state which bent the flexible tube of the state of FIG. It is the figure which showed the state which inclined and arrange | positioned the flexible tube with respect to the longitudinal direction of the 2nd cover part. ((A) represents a state in which the flexible tube is straight, (B) represents a state in which the flexible tube is bent toward the inside of the sheet, and (C) represents a state in which the flexible tube is bent toward the outside of the sheet.) It is a conceptual diagram which shows that a 1st cover part and a 2nd cover part interfere when a flexible tube is bent. It is sectional drawing which shows the arrangement | positioning relationship of a 1st cover part and a 2nd cover part in the state which bent the illuminating device. It is the figure which showed the relative position of the 1st cover part and 2nd cover part of A area | region in FIG. ((A) represents a state in which the first brake mechanism is activated, and (B) represents a state in which the second brake mechanism is activated.) It is a figure which shows the aspect which inserts a flexible tube with respect to a 2nd cover part. ((A) represents a state before the flexible tube is inserted into the second cover part, and (B) represents a state after the flexible tube is inserted into the second cover part.) It is a figure which shows the modification which made the longitudinal direction of a flexible tube correspond with the longitudinal direction of a 2nd cover part. It is a conceptual diagram which shows that a flexible tube is twisted by twisting a 1st cover part. It is the figure which showed the XIV-XIV cross section in FIG. It is a figure which shows the relationship between the groove part provided in the 1st cover part, and the projection part provided in the 2nd cover part. ((A) represents the shape of the groove portion in the embodiment, and (B) represents the shape of the groove portion in the deformation mode.)

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings as appropriate.
Note that in the present specification, directions such as the front-rear direction, the up-down direction, and the left-right direction are defined as X in the front direction, Y in the left direction, and Z in the up direction. For example, normally, when the occupant is seated, entering the field of view is the front, and the occipital side not entering the field of view is the rear.
The vehicle seat 1 of the present embodiment is a vehicle seat 1 used for a train. In addition, the vehicle seat 1 supports a seat back 3 that serves as a backrest portion of the occupant, a pillow portion 31 provided in the seat back 3, a seat cushion 2 that forms a seating surface, and a forearm portion of a seated person. The armrest part 4 which can do is provided. The seat back 3 is pivotally connected to the seat cushion 2 and is configured to be able to hold an angle formed by the seat back 3 and the seat cushion 2 at a desired angle. Further, a cover portion 5 is provided on the back surface of the seat back 3 so as to wrap the seat back 3 on the back surface. The cover 5 is configured to be connected to both the armrests 4 and 4 arranged on the left and right.
Moreover, the desk part 41 accommodated in the armrest part 4 is configured to be displaceable, and is configured to be positioned so as to straddle the left and right armrest parts 4, 4 in front of the armrest part 4. The seat back 3 is provided with an illuminating device 7 that can illuminate the hand of the occupant from obliquely above, and serves as a so-called reading light. The lighting device 7 is provided with a bent portion, and the irradiation direction can be changed using the bent portion (see FIG. 2).

First, the outline of the illumination device 7 will be described.
As shown in FIG. 3, the illuminating device 7 includes an illuminating device 73 as a light source, and electrical wiring used to supply electricity to the illuminating device 73. An LED light is used as the illumination tool 73, and a wire harness 75 is used as the electrical wiring. Moreover, the illuminating device 7 has a main outer shape formed of an aluminum cover 71, and is arranged so as to be able to illuminate the lower front side obliquely from the upper part of the seat back 3 as shown in FIG. 1. Note that the cover 71 of the lighting device 7 in the present embodiment is configured by combining the first cover portion 711, the second cover portion 712, and the third cover portion 713. The lighting device 7 is connected to a power source (not shown), and can be turned on and off by operating a button (not shown) in the vicinity of the tip of the lighting device 7.

The illuminating device 7 can change the irradiation direction of the light source when operated by a passenger. Therefore, the 1st cover part 711 arrange | positioned at the front-end | tip part side of the illuminating device 7 and the 2nd cover part 712 arrange | positioned adjacent to the 1st cover part 711 are comprised so that relative displacement is possible. In particular, both the first cover part 711 and the second cover part 712 are connected to the flexible tube 72 so that the first cover part 711 and the second cover part 712 can be bent while being arranged adjacent to each other (see FIG. 3). ).
The flexible tube 72 used in this embodiment has a double structure so that two spiral metals are entangled. More specifically, the shape is such that the leaf spring is spirally wound around the outer periphery of the spiral coil. Moreover, it has the structure which can be made to insert the wire harness 75 which is an electrical wiring in the inside.

  When the flexible tube 72 in the present invention is deformed so as to draw an arc, the shape can be maintained even after the force necessary for the deformation is removed. However, there is a limit to the deformation mode, and even if it is less than a specific curvature radius, the form cannot be appropriately maintained. In addition, since the durability may be deteriorated when bent to a specific curvature radius or less, it is not recommended to bend and use the specific curvature radius or less.

The flexible tube 72 is connected to the first cover portion 711 on one end side and is connected to the second cover portion 712 on the other end side. A third cover portion 713 is connected so as to cover a part of the outer periphery of the second cover portion 712. The second cover part 712 and the third cover part 713 are connected in a fixed state so that no relative movement occurs.
In the present embodiment, the third cover portion 713 is connected to the seat back 3 constituting the seat body of the vehicle seat 1.

Next, the connection form of the first cover portion 711 to the third cover portion 713 and the flexible tube 72 will be described.
The first cover portion 711 and the flexible tube 72 are fixed by a hexagonal socket set screw generally referred to as a lead screw in addition to fixing by an adhesive. The second cover part 712 and the flexible tube 72 are fixed with an adhesive, and the second cover part 712 and the third cover part 713 are also fixed with an adhesive. Furthermore, the second cover portion 712, the third cover portion 713, and the end portions of the flexible tube 72 are fixed with a set screw so that they do not move relative to each other.
Further, the first cover part 711 and the second cover part 712 are configured to be relatively movable while being in sliding contact with each other, and are arranged inside by the relative movement of the first cover part 711 and the second cover part 712. The flexible tube 72 is bent.
The second cover portion 712 is configured to be fitted with a third cover portion through hole 713a that is a through hole provided in the third cover portion 713, and a part of the second cover portion 712 is bonded and fixed with an adhesive. At the same time, the step structure provided in the second cover portion 712 and the step structure provided in the third cover portion 713 are engaged to determine a predetermined fitting depth.

By adopting this configuration, the first cover portion 711 and the second cover portion 712 can be moved relative to each other, and the relative positional relationship can be maintained when the relative movement is achieved. That is, the irradiation direction irradiated by the lighting tool 73 is configured to be changeable.
Note that the wire harness 75 arranged on the inner peripheral side of the flexible tube 72 in the present embodiment is configured such that the lighting fixture 73 is connected to one side and the other side is connected to a power source (not shown). Yes.

In the present embodiment, the flexible tube 72 is used so that it can be bent. However, it is not possible to bend any angle, and a bending angle regulating mechanism that regulates the bending angle is provided. . Therefore, the regulation of the bending angle of the flexible tube 72 will be described more specifically.
The flexible tube 72 does not have any problem in any shape. Conditions that can withstand deformation are determined. Specifically, conditions that can withstand the radius of curvature are determined.
The flexible tube 72 used in the present embodiment is assumed to have a radius of curvature of 60 mm, and it is not assumed to be used with a radius of curvature less than that.
For example, the first fixing member 91 and the second fixing member 92 are connected by the flexible tube 72 as shown in FIG. In this state, the length H of the bendable portion of the flexible tube 72 is 31.4 cm. When the flexible tube 72 is bent in an arc shape as shown in FIG. 4B, the angle θ ₁ formed by the flexible tube 72 is within an allowable range up to 30 degrees or less. The angle θ ₁ formed by the flexible tube 72 coincides with the angle difference θ ₂ in the outer shape of the first member between the state before bending and the state after bending. That is, if θ ₂ is 30 degrees or less, the bending of the flexible tube 72 is within an allowable range.
Thus, in the specification in which the radius of curvature of the flexible tube 72 is assumed to be 60 mm, when the length H of the bendable portion is 31.4 cm, it is possible to cause the flexible tube 72 to tilt more than 30 degrees. This increases the burden on the flexible tube 72 and causes the flexible tube 72 to deteriorate at an early stage.
Therefore, in order to avoid a situation where the flexible tube 72 is burdened, it is conceivable that the flexible tube 72 is configured not to be bent excessively. For this reason, in this Embodiment, the bending angle control mechanism is comprised by controlling the bending angle of the cover 71 which is a member located in the outer side of the flexible tube 72. FIG. More specifically, as shown in FIG. 5, a bending angle regulating mechanism is formed by adopting a configuration in which a part of the second cover part 712 is fitted on the inner peripheral side of the first cover part 711 outside the flexible tube 72. ing. With this configuration, when the flexible tube 72 is bent by relatively displacing the first cover portion 711 and the second cover portion 712, the first cover portion 711 and the second cover portion 712 are shown in FIG. The contact is made so that the relative displacement of is suppressed. In the present embodiment, when the first cover portion 711 and the second cover portion 712 are in contact with each other and the relative movement is not possible, the inclination θ ₁ of the flexible tube 72 is 25 degrees. This is a state in which an arc having a radius of curvature of 72 mm is drawn. That is, the arc drawn by the flexible tube 72 is set so that it can be used only within a range in which an arc that is gentler than the arc that can be used as a standard is drawn.

By the way, as described above, the flexible tube 72 is limited in its bending angle. Therefore, it is conceivable to lengthen the flexible tube 72 in order to bend as much as possible. Considering only the irradiation in a specific direction, there is no big problem even in such a mode. However, if the flexible tube 72 is lengthened, the illumination device 7 is more likely to vibrate. Moreover, if the flexible tube 72 is lengthened, the entire length of the lighting device 7 must be lengthened. In other words, in order to satisfy the demand from a viewpoint different from the irradiation direction, which is as compact as possible and to reduce vibration, a corresponding method of lengthening the flexible tube 72 is not suitable.
On the other hand, the illumination device 7 of the vehicle seat 1 is almost determined to be an area to be irradiated. For example, the demand for irradiation toward the outside of the sheet shown in FIG. 1 is not high.

Therefore, in the present embodiment, as shown in FIG. 7A, the first cover portion 711 is in a state parallel to the central axis of the first cover portion 711 so as to coincide with the longitudinal direction thereof. As described above, the end portion of the flexible tube 72 is fixed. In the second cover portion 712, the end portion of the flexible tube 72 is fixed by being inclined from the longitudinal direction of the second cover portion 712. In particular, the end of the flexible tube 72 is fixed in a state of being inclined toward the inside of the seat. More specifically, the second cover portion 712 is inclined by 5 degrees toward the inner side of the vehicle seat 1 with respect to the central axis in the longitudinal direction.
If the said structure is employ | adopted, since the flexible tube 72 inclines 5 degree | times from the central axis of the longitudinal direction of the 2nd cover part 712, if the flexible tube 72 is inclined only 25 degree | times, for example, the 2nd cover part 712 It is inclined 30 degrees from the longitudinal central axis (see FIG. 7B).
Further, the longitudinal direction of the first cover portion 711 and the longitudinal direction of the second cover portion 712 can be made the same direction by inclining 5 degrees with respect to the outside of the vehicle seat 1 (see FIG. 7C). ).
The longitudinal direction of the first cover part through-hole 711a that is provided in the first cover part 711 and fixes the flexible tube 72 is provided so as to substantially coincide with the direction of the central axis of the first cover part 711. (See FIG. 3).

By the way, as shown in FIG. 5, the configuration in which a part of the second cover is fitted on the inner peripheral side of the first cover portion 711 outside the flexible tube 72 is effective in avoiding the bending of the flexible tube 72. However, when the outer shape of the cover is reduced, the timing at which the first cover portion 711 and the second cover portion 712 come into contact tends to be accelerated. Therefore, as shown in FIG. 8, even if the first cover part 711 and the second cover part 712 are bent so as to have an inclination of 30 degrees, the first cover part 711 and the second cover part 712 interfere with each other. In other words, there may be a case where only a bend smaller than 30 degrees is possible. Even in this case, by increasing the outer shape of the first cover portion 711, the event can be eliminated, but if the end of the flexible tube 72 is inclined and fixed to the second cover portion 712, Even if the outer shape allows the angle of the flexible tube 72 to be only 25 degrees, the inclination angle between the first cover part 711 and the second cover part 712 may be allowed to 30 degrees. In other words, the inclination angle between the first cover part 711 and the second cover part 712 can be set to a desired angle without increasing the outer shape of the first cover part 711.
In addition, although the angle which can form the 1st cover part 711 and the 2nd cover part 712 will become small with respect to the area | region outside the vehicle seat 1, since it is an area | region where the desire to irradiate is not high, it is large. There is no problem.

Next, the detailed structure of the first cover part 711 and the second cover part 712 will be described.
The first cover part 711 has a substantially cylindrical shape, and has a structure including a lighting device 73 on one end side thereof. A second cover portion 712 is positioned on the other end side of the first cover portion 711 so as to be slidable in contact with the inner peripheral surface thereof.
The second cover portion 712 has a barrel-shaped portion with a bulge at its end, and the outer peripheral surface thereof can be in sliding contact with the inner peripheral surface of the first cover portion 711.
Further, when the first cover part 711 is moved from the state shown by the solid line in FIG. 2 to the state shown by the two-dotted line, the inner surface of the first cover part 711 and the outer surface of the second cover part 712 are moved. The generated frictional force is increased and further displacement is suppressed. The positional relationship between the first cover portion 711 and the second cover portion 712 in this state is as shown in a sectional view in FIG. At this time, the tip of the first cover portion 711 is not in contact with the second cover portion 712 as shown in FIG. More specifically, the first cover portion 711 and the second cover portion 712 are in contact with each other at the portion closer to the lighting fixture 73. With the operation load when the seated person normally operates, the lighting device 7 is bent only up to this state. In this state, the contact portion, which is a portion where the first cover portion 711 and the second cover portion 712 are in contact with each other, is located at a place where it cannot be seen from the outside of the lighting device 7.
In a special case where the entire weight of the occupant is applied to the first cover portion 711, the first cover portion 711 cannot endure only with the frictional force. Therefore, the first cover part 711 and the second cover part 712 are further bent. In this state, as shown in FIG. 10B, the tip end portion of the first cover portion 711 contacts the second cover portion 712 so that no further sliding occurs. In this state, the relative displacement between the first cover portion 711 and the second cover portion 712 is further suppressed.

  In other words, the increase in the frictional force between the first cover part 711 and the second cover part 712 prevents the relative displacement between the first cover part 711 and the second cover part 712 from exceeding a predetermined value, thereby The flexible tube 72 is further bent to restrict the bending angle from increasing. In addition, in the case where it is not possible to suppress it, the tip of the first cover part 711 comes into contact with the second cover part 712, so that the relative displacement between the first cover part 711 and the second cover part 712 becomes a predetermined value or more. Is further suppressed. As a result, the flexible tube 72 is further bent to further increase the bending angle. In this state, the first cover part 711 and the second cover part 712 cannot move relative to each other.

  Therefore, according to the present embodiment, when the flexible tube 72 is bent, the first brake mechanism that regulates the bending angle of the flexible tube 72 as a first stage at a predetermined position works. Even if a large load that overcomes the force that regulates the bending angle is applied, the second brake mechanism that regulates the bending angle of the flexible tube 72 will work, so that the bending angle of the flexible tube 72 can be made stronger. It is possible to regulate.

  In the present embodiment, when the first brake mechanism operates, the contact location where the first cover portion 711 and the second cover portion 712 are in contact is the inside of the inner peripheral surface of the first cover portion 711. It is a portion that is not exposed so as to be visible. Therefore, even when the first cover portion 711 and the second cover portion 712 come into contact with each other, even if a scratch is generated due to friction, the portion is not a portion that can be visually recognized by the seated person, and thus deterioration of the appearance is suppressed. Is possible.

In the present embodiment, the end portion of the flexible tube 72 is fixed at a specific position of the second cover portion through hole 712 a that is a through hole provided in the second cover portion 712. However, if there is merely a through hole into which the flexible tube 72 can be inserted, the insertion length of the flexible tube 72 is difficult to manage. Therefore, in the present embodiment, a flexible tube step portion 712b that can be in contact with the end surface of the flexible tube 72 is formed on the wall surface of the second cover portion through-hole 712a so that the insertion length of the flexible tube 72 can be managed. doing.
As shown in FIGS. 11A and 11B, the flexible tube 72 is inserted into the second cover part through hole 712a from one end side of the second cover part 712, and the through hole It can be inserted up to the step portion 712b for the flexible tube provided on the wall surface, and cannot be inserted further.
More specifically, the flexible tube 72 inserted from the barrel-shaped portion of the second cover portion 712 is a step portion for flexible tube provided at an end portion of the flexible tube fixing region 712c having substantially the same diameter as the flexible tube 72. The insertion position of the flexible tube 72 is determined such that the end surface of the flexible tube 72 is in contact with the surface of the 712b.
With this configuration, the flexible tube 72 may be fixed in a state where the one end of the flexible tube 72 enters the back side (the third cover portion 713 side) of the second cover portion 712 from the position where the flexible tube 72 is planned. It can also be suppressed that the one end is fixed on the front side of the second cover part 712 (the first cover part 711 side) from the position where the one end is planned, and the flexible tube 72 and the second cover part 712 are specified. It can be easily fitted in depth.

The 2nd cover part 712 through-hole provided in the 2nd cover part 712 is provided by shaving aluminum. In the present embodiment, the second cover part through-hole 712a can be formed as a whole by grinding from one end side to the middle position and then grinding from the other end side to the middle position. The wall surface formed by scraping from one end side and the wall surface formed by scraping from the other end side are cut so that a step is formed. Although the thickness of the step is the thickness at which the flexible tube 72 is caught, it is not more than half of the difference between the inner diameter and the outer diameter of the flexible tube 72 (the thickness of the wall surface of the flexible tube 72). Thereby, it sets so that it may not become an obstruction at the time of inserting the wire harness 75 in the flexible tube 72 by the thickness of the level | step-difference part 712b for flexible tubes (refer FIG.3 and FIG.11 (B)).
In the present embodiment, the flexible tube 72 is straightened so that the longitudinal direction of the flexible tube 72 is inclined with respect to the longitudinal direction of the second cover portion 712. However, as shown in FIG. It is also possible to adopt a configuration in which the flexible tube 72 is disposed so as to be inclined with respect to the longitudinal direction of the flexible tube 72 and the longitudinal direction of the second cover portion 712.

The second cover portion through-hole 712a of the present embodiment is not a through-hole having the same diameter in all the longitudinal directions, but the flexible tube fixing region 712c in which the diameter of the through-hole is the same, and the diameter of the through-hole gradually. A flexible tube bending allowable region 712d, which is a changing region, is provided. In the flexible tube fixing region 712c, the diameter is substantially the same as the outer shape of the flexible tube 72, and the flexible tube 72 and the second cover portion 712 are bonded and fixed. Further, the flexible tube bending allowable region 712d is a region constituting a space that allows the flexible tube 72 to be bent.
The flexible tube bending allowable region 712d is formed so as to be angled with respect to the longitudinal direction of the second cover portion 712 mainly on the barrel-shaped portion side provided in the second cover portion 712. The opening area is increased. In particular, it is formed so as to spread greatly toward the inner side of the sheet, which is the main bending direction (see FIGS. 3 and 11B, etc.).

By the way, the end of the flexible tube 72 is connected so as to be fixed to the first cover portion 711 and the second cover portion 712. Therefore, as shown in FIG. 13, when a force is applied to the first cover portion 711 in the twisting direction, the force is applied so as to be twisted in the circumferential direction of the flexible tube 72.
Since the flexible tube 72 is not strong against the twisting force in the circumferential direction, it is not preferable that the twisting force is applied to the flexible tube 72 when the first cover portion 711 is twisted.

Therefore, in the present embodiment, a twist suppression mechanism that suppresses the flexible tube 72 from being twisted in the circumferential direction is provided. The twist suppression mechanism is provided in the cover 71 that covers the outside of the flexible tube 72, and is formed by providing an uneven shape.
More specifically, a barrel-shaped portion located at the end of the second cover portion 712 is provided with a substantially cylindrical protrusion 712d that protrudes in the vertical sectional view radial direction of the through hole (see FIG. 14). ), The first cover portion 711 is provided with a groove portion 711d for restricting the moving direction of the protruding portion 712d. As shown in FIG. 15A, the groove portion 711d is a groove portion 711d provided linearly in the same direction as the longitudinal direction of the first cover portion 711, and the width of the groove portion 711d is larger than the length of the diameter of the protruding portion 712d. It has a slightly longer configuration. The protrusion 712d is configured to be movable in the groove 711d. Therefore, it is possible to suppress the first cover portion 711 from being twisted in the circumferential direction. Since the protrusion 712d has a substantially cylindrical shape, the flexible tube 72 can be bent slightly in the vertical direction in addition to bending in the horizontal direction.

  In the present embodiment, the protrusion 712d and the groove 711d are arranged toward the inside of the sheet. The portion is a portion that is displaced so that the first cover portion 711 covers the second cover portion 712 deeply when the irradiation direction is changed to the inside of the sheet. Therefore, since the protrusions 712d and the like are difficult to see from the seated person, it is possible to play the role of preventing the flexible tube 72 from being twisted in the circumferential direction without impairing the design.

As shown in FIG. 15B, a part of the groove portion 711d may have a linear shape with a substantially uniform groove width, and the groove width may be tapered from there. If the angle formed by the first cover portion 711 and the second cover portion 712 is within a specific range, the first cover portion 711 and the second cover portion 712 are almost completely due to the engagement between the groove and the protrusion 712d. It is possible to secure a state where the twisting is not possible and to allow a slight twisting when the angle formed by the first cover part 711 and the second cover part 712 is in other ranges.
Even if the protrusion 712d exists in the tapered region and the flexible tube 72 is slightly twisted, when the protrusion 712d moves to the linear region, FIG. Since it moves as shown by the arrow, it is possible to eliminate the twisted state of the flexible tube 72 naturally.

In the case of the vehicle seat 1 according to the present embodiment, since the lighting device 7 is provided on the seat back 3 of the vehicle seat 1, the vehicle seat 1 can be seated even when the state of the vehicle seat 1 is changed, for example, the seat back 3 is tilted. The relative positions of the person and the lighting device 7 are similar. Therefore, the seated person can always easily operate the lighting device 7. Moreover, since the irradiation direction of the illuminating device 7 can be changed, it is easy to use. Furthermore, since it becomes the structure which does not put an excessive burden on the flexible tube 72, it becomes possible to raise the durability of the illuminating device 7. FIG.
Moreover, since the flexible tube 72 has a structure that cannot be seen from the outside, it is possible to improve the design.
Moreover, since the bending of the flexible tube 72 is regulated by the sliding of the first cover portion 711 and the second cover portion 712, a situation in which the flexible tube 72 is extremely deformed is suppressed. Therefore, it is possible to suppress an excessive load on the flexible tube 72.
In addition, since the relative angle that the first cover portion 711 and the second cover portion 712 can take is determined, the bending of the flexible tube 72 within the standard specification can be performed without being aware of the bending angle of the flexible tube 72. Easy to use because it can only be bent to an angle.
Further, even if the lighting device 7 is bent, the electric wiring routed in the lighting device 7 does not cause excessive bending, so that disconnection of the electric wiring in the lighting device 7 can be suppressed. It becomes possible.
Moreover, since the 1st cover part 711-the 3rd cover part 713 are created with aluminum, there exists sufficient intensity | strength and heat dissipation is also good.
Moreover, since the length of the flexible tube 72 is as short as about 8 cm and the length of the substantially bendable portion of the flexible tube 72 is about 3 to 4 cm, the illumination device 7 as a whole is less likely to vibrate. Therefore, generation | occurrence | production of the vibration of the illuminating device 7 resulting from the vibration of the vehicle seat 1 can be suppressed as much as possible.
Further, the first cover portion 711 is provided with a plurality of hole portions 711f around the portion where the flexible tube 72 is fixed, thereby reducing the weight and enhancing the heat dissipation effect.

Although one embodiment has been described above, the present invention can be implemented in various other forms besides the above embodiment.
For example, in the present embodiment, the second cover portion and the third cover portion are separate members, but it is also possible to adopt a configuration in which the sheet body and the flexible tube are connected by a single member.
In addition, the flexible tube and the first cover part can be fixed by using only adhesive or screws without using both adhesive fixing and screw fixing. It is also possible to adopt.
Further, the lighting device can be provided not only on the seat back but also on an armrest or a headrest.
Further, the flexible tube is not necessarily made of metal, and may be configured to include metal and resin, or may be configured only from resin.
In addition, by providing a plurality of flexible tubes in the lighting device, it is possible to bend at a plurality of locations between the base end portion and the distal end portion. In that case, the cover may be constituted by four or more cover portions.
Further, the cover portion need not be made of metal, and can be made of wood or resin.
In addition, the flexible tube does not have to have a double structure so that two spiral members are entangled with each other.
Further, the configuration in which the longitudinal direction of the straight flexible tube and the longitudinal direction of the second cover portion are inclined is not a configuration in which a part of the second cover portion is covered by the first cover portion. It is also possible to adopt.
In addition, the flexible tube is not limited to the one having a radius of curvature of up to 60 mm, and it is also possible to select a flexible tube having a practical range of curvature.
Further, the angle formed between the longitudinal direction of the second cover part and the flexible tube is not necessarily 5 degrees, and can be a desired value such as 2 degrees or 10 degrees.
Further, the vehicle is not limited to a vehicle such as a train, but may be a vehicle that flies in the air such as an airplane or a helicopter, or a vehicle that moves on the sea surface or in the sea such as a ship or a submersible.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat cushion 3 Seat back 4 Armrest part 5 Cover part 7 Illuminating device 71 Cover 72 Flexible tube 73 Illuminating tool 711 1st cover part 712 2nd cover part 713 3rd cover part

Claims (3)

A vehicle seat equipped with a lighting device capable of changing the irradiation direction by bending a bendable flexible tube,
The lighting device includes a first cover portion disposed on the illuminator side, a second cover portion disposed on the seat body side, and a flexible tube connecting the first cover portion and the second cover portion. Provided, and the end portion of the first cover portion covers the outside of the flexible tube together with the end portion of the second cover connected to the flexible tube,
The lighting device is provided with a bending angle restricting mechanism capable of restricting the bending angle of the flexible tube. The bending angle restricting mechanism includes a first brake mechanism for restricting the bending angle and a restriction by the first brake mechanism. e Bei the second brake mechanism which functions when the unquenchable load is applied,
The first brake mechanism includes an end inner surface of the first cover part and an end outer surface of the second cover part that is in contact with the end inner surface of the first cover part.
The second brake mechanism includes an end portion of the second cover portion that comes into contact with an end portion of the first cover portion when the flexible tube is bent and the first cover portion is inclined with respect to the second cover portion. vehicle seat, characterized in that is. The vehicle seat according to claim 1,
The lighting device includes a cylindrical first cover portion and a second cover portion, and a contact portion between the first cover portion and the second cover portion constituting the first brake mechanism is not exposed so as to be visible. A vehicle seat characterized by that. The vehicle seat according to claim 1 or 2,
As the lighting device bends the flexible tube and tilts the first cover portion toward the inner side of the sheet with respect to the second cover portion, the end portion on the inner side of the sheet of the first cover portion becomes the end portion on the inner side of the sheet of the second cover portion. It is a structure that is displaced so as to gradually approach and deeply cover,
The first brake mechanism is provided only at the outer ends of the seats of the first cover part and the second cover part,
The second brake mechanism is configured by an end portion on the inner side of the seat of the second cover portion that comes into contact with an end portion of the first cover portion when the first cover portion is inclined toward the inner side of the seat with respect to the second cover portion. vehicle seat, characterized in that is.

Images