Vehicle seat

Abstract

To provide a vehicle seat capable of reducing the mass and size of a configuration for supporting a hinge pin.SOLUTION: A vehicle seat 1 can reduce the mass and size of a configuration for supporting a hinge pin 7 compared to a configuration described in the patent literature 1 due to that the hinge pin 7 can be rotatably supported by a bushing 10. The bushing 10 is a member for configuring a slide bearing which rotatably supports the hinge pin 7, is a block body provided with a through hole 10A into which the hinge pin 7 penetrates, and is directly welded and fixed to a recliner plate 32A.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a vehicle seat to be installed in a vehicle. [Background technology]

[0002] For example, in the vehicle seat described in Patent Document 1, a hinge bracket (60) formed by pressing a plate material rotatably supports a hinge pin (4a). The hinge bracket (60) is fixed to a recliner plate (3f) via a rotation operation member (50). The reference numerals in parentheses are reference numerals in Patent Document 1. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-30519 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the vehicle seat described in Patent Document 1, the hinge bracket and rotation operating member for supporting the hinge pin are large in size, which results in a large mass of the components for supporting the hinge pin and requires a large space to arrange these components.

[0005] In view of the above, the present disclosure discloses an example of a vehicle seat that can reduce the mass and size of a structure for supporting a hinge pin. [Means for solving the problem]

[0006] It is desirable for a vehicle seat to be installed in a vehicle to have at least one of the following configuration requirements, for example. In other words, the constituent elements are a recliner plate (32A) to which a recliner (61) is attached and which is fixed to the cushion frame (32), a hinge pin (7) for releasing the recliner (61), and a bushing (10) constituting a sliding bearing which rotatably supports the hinge pin (7), the bushing (10) being fixed to the recliner plate (32A), the bushing (10) being in the shape of a block having a through hole (10A) through which the hinge pin (7) passes, and being directly fixed to the recliner plate (32A).

[0007] As a result, in the vehicle seat, the hinge pin (7) is rotatably supported by the bushing (10), which may make it possible to reduce the mass and size of the structure for supporting the hinge pin (7) compared to the structure described in Patent Document 1.

[0008] The vehicle seat may have the following configuration. That is, it is desirable that the cable operation bracket (11) to which the operating cable (13) is connected is rotatable around the central axis of the hinge pin (7), and that the cable operation bracket (11) is provided with a brim-shaped flange portion (7B) that protrudes outward from the hinge pin (7), and that the cable operation bracket (11) is sandwiched between the flange portion (7B) and the bushing (10) in a state in which it can come into sliding contact with the flange portion (7B) and the bushing (10).

[0009] As a result, the position of the cable operating bracket (11) in the central axial direction is determined with reference to the bushing (10). In other words, since the cable operating bracket (11) contacts the bushing (10), the position of the cable operating bracket (11) in the central axial direction is uniquely determined by the outer dimensions of the bushing (10). Therefore, in this vehicle seat, the positional accuracy of the cable operating bracket (11) in the central axial direction can be easily achieved with high accuracy.

[0010] The cover member prevents the hinge pin (7) from falling out of the through hole (10A), and is provided with a cover member (12) fixed to the recliner plate (32A), and it is desirable that the cover member (12) is positioned on the opposite side of the flange portion (7B) from the cable operating bracket (11).

[0011] The cover member (12) is preferably provided with a cable locking portion (12C) for locking an outer tube (13A) of the operating cable (13). It is also preferable that a spring (14) is provided for applying an elastic force to the cable operating bracket (11), and that the cover member (12) is provided with a spring holding portion (12D) for holding the spring (14).

[0012] Furthermore, the spring (14) is provided with an action portion (14B) that contacts the cable operation bracket (11) and applies an elastic force to the cable operation bracket (11), the action portion (14B) being a linear action portion extending approximately parallel to the central axis, and a regulating portion (12E) that is provided on the cover member (12) and contacts the action portion (14B) when the action portion (14B) tilts beyond a predetermined dimension to regulate further tilt of the action portion (14B), and it is desirable that the regulating portion (12E) is offset with respect to the cable operation bracket (11) in a direction parallel to the central axis.

[0013] Incidentally, the symbols in the above parentheses are examples showing the corresponding relationship with the specific configurations etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations etc. shown by the symbols in the above parentheses. [Brief description of the drawings]

[0014] [Figure 1] 1 is a diagram showing a vehicle seat according to a first embodiment. FIG. [Diagram 2] FIG. 2 is a diagram showing a configuration around a hinge pin according to the first embodiment. [Diagram 3] FIG. 2 is an exploded view of the periphery of a hinge pin according to the first embodiment. [Figure 4]FIG. 2 is a diagram showing a bushing according to the first embodiment. [Diagram 5] FIG. 2 is a diagram showing a structure around a hinge pin according to the first embodiment. [Figure 6] FIG. 2 is a diagram showing a configuration around a hinge pin according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The following "embodiment of the invention" shows an example of an embodiment that falls within the technical scope of the present disclosure. In other words, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiment.

[0016] This embodiment is an example in which a vehicle seat according to the present disclosure is applied to a seat (hereinafter, referred to as a vehicle seat) mounted on a vehicle such as a car. Arrows and diagonal lines indicating directions are provided in each figure to facilitate understanding of the relationships between the figures and the shapes of components or parts.

[0017] Therefore, the vehicle seat is not limited to the directions shown in the drawings. The directions shown in the drawings are directions in a state in which the vehicle seat according to the present embodiment is assembled to a vehicle. The drawings with diagonal lines do not necessarily show cross-sectional views.

[0018] At least one of each of the members or parts described with a reference number is provided, unless otherwise specified by "one". In other words, unless otherwise specified by "one", two or more of the member may be provided. The vehicle seat shown in the present disclosure includes at least one of the components such as the members or parts described with a reference number and the structural parts shown in the drawings.

[0019] (First embodiment) <1. Overview of vehicle seats> 1, the vehicle seat 1 includes at least a seat cushion 3 and a seat back 5. The seat cushion 3 is a portion for supporting the buttocks of a seated occupant. The seat back 5 is a portion for supporting the back of the seated occupant.

[0020] The seat cushion 3 is configured to include at least a cushion frame 31 and a cushion pad (not shown), etc. The cushion frame 31 forms the framework of the seat cushion 3. The cushion pad is an elastic member such as urethane foam.

[0021] The cushion frame 31 according to this embodiment is a frame-shaped frame including at least cushion side frames 32, 33 and a connecting member 34. The cushion side frame 32 is disposed on one end side in the seat width direction and extends in the front-rear direction of the seat.

[0022] The cushion side frame 33 is disposed on the other end side in the seat width direction and extends in the seat front-rear direction. The connecting member 34 extends in the seat width direction and connects the two cushion side frames 32, 33 together.

[0023] The seat back 5 is configured to include at least a back frame 51 and a cushion pad (not shown), etc. The back frame 51 forms the framework of the seat back 5. The cushion pad is an elastic member such as urethane foam.

[0024] The back frame 51 according to this embodiment is a frame-shaped frame including at least back side frames 52, 53 and at least one connecting member 54. The back side frame 52 is disposed on one end side in the seat width direction and extends substantially in the vertical direction.

[0025] The back side frame 53 is disposed on the other end side in the seat width direction and extends substantially in the vertical direction. The connecting member 54 extends in the seat width direction and connects the two back side frames 52, 53 together.

[0026] Reclining plates 32A, 33A, recliners 61, 62, etc. are provided at the connection points between the cushion frame 31 and the back frame 51. The recliner plate 32A has the recliner 61 attached thereto and is fixed to the cushion side frame 32.

[0027] The recliner plate 33A has a recliner 62 attached thereto and is fixed to the cushion side frame 33. The recliners 61, 62 are mechanisms for adjusting the angle of the back frame 51 relative to the cushion frame 31.

[0028] Specifically, the recliners 61 and 62 are configured to include a ratchet having an internal gear, and a pawl having external teeth that engage with the internal gear, etc. This configuration is similar to that of the recliner disclosed in, for example, JP 2000-102440 A.

[0029] The recliners 61, 62 according to this embodiment have a release function (also called a fold-down function). The release function is a function for folding down the back frame 51 forward so that the seat back 5 approaches the seat cushion 3.

[0030] In this embodiment, as shown in FIG. 2, components for realizing the release function include at least a hinge pin 7, a release lever 8, an operation cable 9, and an operation lever (not shown).

[0031] The operating lever is an operating part that is rotated by a user when activating the release function. The hinge pin 7 is a shaft member that rotates mechanically in conjunction with the rotation of the operating lever when activating the release function.

[0032] When the hinge pin 7 rotates, the recliner 61 operates to collapse the back frame 51 forward (hereinafter, also referred to as a release operation). Specifically, when the hinge pin 7 rotates, the engagement between the ratchet and the pawl of the recliner 61 is released. As a result, the elastic force of the spiral spring (not shown) causes the back frame 51 to collapse forward.

[0033] The release lever 8 is a lever that rotates integrally with the hinge pin 7. The operation cable 9 is a control cable connected to the release lever 8. The operation cable 9 transmits the rotation of the hinge pin 7 to the recliner 62 to release the recliner 62.

[0034] The operating lever is directly connected to the hinge pin 7. Therefore, when a user rotates the operating lever, the hinge pin 7 rotates in conjunction with the operating lever. Therefore, the recliners 61, 62 are released in conjunction with the rotation of the operating lever.

[0035] <2. Hinge pin support structure, etc.> 3, at least a bushing 10, a cable operation bracket 11, a cover member 12, etc. are provided around the hinge pin 7 and the recliner 61. The recliner plate 32A is fixed by welding to one surface of the recliner 61. The other surface of the recliner 61 is fixed by welding to the back side frame 52.

[0036] <hinge pin> The hinge pin 7 has a rod-shaped shaft portion 7A and a flange portion 7B. The flange portion 7B is a brim-shaped portion protruding outward from the shaft portion 7A. Note that the flange portion 7B according to this embodiment is a ring-shaped portion protruding around the entire circumference of the shaft portion 7A.

[0037] <Bushing> The bushing 10 is a member that constitutes a sliding bearing that rotatably supports the hinge pin 7, and is fixed to the recliner plate 32A by a fixing method such as press fitting or welding (welding in this embodiment).

[0038] The bushing 10 is a block body having a through hole 10A through which the hinge pin 7 passes, and is fixed directly to the recliner plate 32A by welding. Specifically, as shown in FIG 4, the bushing 10 has a large diameter portion 10B and a small diameter portion 10C.

[0039] The large diameter portion 10B has an outer diameter dimension larger than that of the small diameter portion 10C. The bushing 10 is an integral product in which the large diameter portion 10B and the small diameter portion 10C are integrally formed (by forging or casting in this embodiment) from metal.

[0040] <Cable management bracket> 2, the cable operation bracket 11 is a cable operation lever to which an operation cable 13 is connected. The cable operation bracket 11 is rotatable about the central axis Lo of the hinge pin 7 (see FIG. 3).

[0041] Specifically, as shown in FIG. 5, the cable management bracket 11 is sandwiched between the flange portion 7B and the bushing 10 in a state in which the cable management bracket 11 is in sliding contact with the flange portion 7B and the bushing 10.

[0042] More specifically, the small diameter portion 10C of the bushing 10 is fitted in a sliding manner into the shaft hole 11A (see FIG. 3) of the cable management bracket 11. The large diameter portion 10B of the bushing 10 is disposed on one side of the cable management bracket 11 (the left side in FIG. 5).

[0043] The flange portion 7B of the hinge pin 7 is disposed on the other side (the right side in FIG. 5) of the cable manipulation bracket 11. Therefore, the cable manipulation bracket 11 is configured to be sandwiched between the flange portion 7B and the bushing 10.

[0044] Incidentally, the cable operating bracket 11 operates to pull the operating cable 13 when the seat back 5 is tilted down and the contact portion 52A (see Figure 2) provided on the seat back 5 collides with the contacted portion 11B (see Figure 2) of the cable operating bracket 11.

[0045] When the operating cable 13 is pulled, a locking device (not shown) that secures the lower rear end of the seat cushion 3 to the vehicle floor is released, allowing the vehicle seat 1 to rotate (tumble) around the lower front end.

[0046] <Cover material> The cover member 12 is a member that prevents the hinge pin 7 from falling out of the through hole 10A of the bushing 10. That is, the cover member 12 is provided with a through hole 12A (see FIG. 3) through which the hinge pin 7 passes.

[0047] The inner diameter of the through hole 12A is smaller than the outer diameter of the flange portion 7B. As shown in Fig. 5, the cover member 12 is disposed on the opposite side of the flange portion 7B from the cable operation bracket 11, and is fixed to the recliner plate 32A. Note that the cover member 12 according to this embodiment is fixed to the recliner plate 32A by welding.

[0048] 2, the cover member 12 is provided with a cable locking portion 12B and a cable locking portion 12C. The cable locking portion 12B is a portion for locking the outer tube 9A of the operation cable 9.

[0049] The cable locking portion 12C is a portion that locks the outer tube 13A of the operation cable 13. Furthermore, the cover member 12 is provided with a spring holding portion 12D that holds a spring 14. The spring 14 applies an elastic force to the cable operation bracket 11.

[0050] 6, the spring 14 is a torsion coil spring, and exerts an elastic force that rotates the cable operation bracket 11 in a direction that pulls the operation cable 13. The spring holding portion 12D supports a coil 14A of the spring 14.

[0051] The spring 14 is provided with an acting portion 14B. The acting portion 14B is a portion that comes into contact with the cable manipulating bracket 11 to apply an elastic force to the cable manipulating bracket 11, and is a linear portion that extends substantially parallel to the central axis Lo.

[0052] A restricting portion 12E is provided on the cover member 12. When the action portion 14B is tilted beyond a predetermined dimension, the restricting portion 12E comes into contact with the action portion 14B to restrict the action portion 14B from further tilting.

[0053] 6, that is, when the seat back 5 is not laid down, a small gap (not shown) is provided between the restricting portion 12E and the acting portion 14B. When the acting portion 14B is tilted, the restricting portion 12E comes into contact with the acting portion 14B, thereby restricting the acting portion 14B from further tilting.

[0054] Furthermore, the restricting portion 12E is offset from the cable manipulating bracket 11 in a direction parallel to the central axis Lo. In other words, the portion of the cable manipulating bracket 11 that is in contact with the acting portion 14B is separated from the restricting portion 12E in a direction parallel to the central axis Lo.

[0055] The spring 16 applies an elastic force to the release lever 8. Therefore, when no operating force is applied to the operating lever, the release lever 8 is held in the position shown in Fig. 2. When the release lever 8 and the hinge pin 7 rotate from this position, the recliners 61, 62 are released.

[0056] <3. Features of the vehicle seat according to this embodiment> In the vehicle seat 1 according to this embodiment, the hinge pin 7 is rotatably supported by the bushing 10. This makes it possible to reduce the mass and size of the structure for supporting the hinge pin 7 in the vehicle seat 1 compared to the structure described in Patent Document 1.

[0057] The cable management bracket 11 is sandwiched between the flange portion 7B and the bushing 10 in a state in which it can make sliding contact with the flange portion 7B and the bushing 10. As a result, the position of the cable management bracket 11 in a direction parallel to the central axis Lo (hereinafter simply referred to as "position") is determined with reference to the bushing 10.

[0058] In other words, because the cable operating bracket 11 comes into contact with the bushing 10, the position of the cable operating bracket 11 is uniquely determined by the outer dimensions of the bushing 10. Therefore, in the vehicle seat 1, the position of the cable operating bracket 11 can easily be achieved with high accuracy.

[0059] The cover member 12 is provided with a cable locking portion 12C that locks the outer tube 13A of the operation cable 13, and a spring holding portion 12D that holds the spring 14. This reduces the number of steps required to attach the cable locking portion 12C and the spring holding portion 12D to the cushion frame 31.

[0060] The restricting portion 12E is provided to restrict further tilt of the acting portion 14B by contacting the acting portion 14B when the acting portion 14B is tilted beyond a predetermined dimension, and the restricting portion 12E is offset from the cable operating bracket 11 in a direction parallel to the central axis Lo. This can prevent the operation of the spring 14 from being hindered.

[0061] (Other embodiments) The bushing 10 according to the above embodiment is cylindrical with a stepped portion. However, the present disclosure is not limited to this. That is, the present disclosure may be configured such that the bushing is, for example, a block body having a rectangular outer shape.

[0062] The bushing 10 according to the above embodiment is made of metal. However, the present disclosure is not limited to this. That is, the present disclosure may be a bushing made of a hard resin such as POM.

[0063] The cable operation bracket 11 according to the above embodiment is for operating an operation cable for unlocking a locking device. However, the present disclosure is not limited thereto. That is, the present disclosure may be, for example, a cable operation bracket for operating another operation cable.

[0064] Cover member 12 according to the embodiment described above is provided with cable locking portion 12C that locks outer tube 13A of operation cable 13, and spring holding portion 12D that holds spring 14. However, the present disclosure is not limited to this.

[0065] In the above-described embodiment, the restricting portion 12E is provided, and the restricting portion 12E is offset from the cable operation bracket 11 in a direction parallel to the central axis Lo. However, the present disclosure is not limited to this. That is, the present disclosure may be, for example, a configuration in which the restricting portion 12E is eliminated, or a configuration in which the restricting portion 12E is adjacent to the cable operation bracket 11.

[0066] In the above embodiment, the vehicle seat according to the present disclosure is applied to a vehicle. However, the application of the invention disclosed in this specification is not limited thereto. That is, the disclosure can be applied to, for example, seats used in vehicles such as railroad cars, ships, and aircraft, as well as stationary seats used in theaters, homes, and the like.

[0067] Furthermore, the present disclosure is not limited to the above-mentioned embodiments as long as it is consistent with the gist of the disclosure described in the above-mentioned embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-mentioned embodiments are combined, or a configuration in which any of the components illustrated or the components described with reference numerals in the above-mentioned embodiments are eliminated. [Explanation of symbols]

[0068] 1... Vehicle seat 3... Seat cushion 5... Seat back 7... Hinge pin 7A... Shaft portion 7B... Flange portion 8... Release lever 9... Control cable 10... Bushing 10A... Through hole 11... Cable operation bracket 12... Cover member 61... Recliner

Claims

1. In a vehicle seat to be mounted on a vehicle, a recliner plate on which a recliner is mounted and which is fixed to the cushion frame; a hinge pin for actuating the recliner to release; a bushing that constitutes a sliding bearing that rotatably supports the hinge pin, the bushing being fixed to the recliner plate; The bushing is a block having a through hole through which the hinge pin passes, and is fixed directly to the recliner plate.

2. a cable operation bracket to which an operation cable is connected, the cable operation bracket being rotatable around a central axis of the hinge pin; a brim-shaped flange portion provided on the hinge pin and protruding outward from the hinge pin; 2. The vehicle seat according to claim 1, wherein the cable operating bracket is sandwiched between the flange portion and the bushing in a state in which the cable operating bracket can make sliding contact with the flange portion and the bushing.

3. a cover member for preventing the hinge pin from falling out of the through hole, the cover member being fixed to the recliner plate; The vehicle seat according to claim 2 , wherein the cover member is disposed on an opposite side of the flange portion from the cable operating bracket.

4. 4. The vehicle seat according to claim 3, wherein the cover member is provided with a cable anchoring portion for anchoring an outer tube of the operation cable.

5. A spring is provided to apply an elastic force to the cable operating bracket, The vehicle seat according to claim 4, wherein the cover member is provided with a spring holding portion that holds the spring.

6. an action portion provided on the spring, contacting the cable management bracket to apply an elastic force to the cable management bracket, the action portion being linear and extending substantially parallel to the central axis; a restricting portion provided on the cover member, the restricting portion contacting the action portion when the action portion is tilted beyond a predetermined dimension to restrict the action portion from further tilting, The vehicle seat according to claim 5 , wherein the restriction portion is offset from the cable operating bracket in a direction parallel to the central axis.

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