Vehicle seats

Abstract

To provide a vehicular seat configured so that the fact that mounting of a bracket for winding out a shaft is forgotten can be detected in a recliner whose space in a seat width direction is limited.SOLUTION: A vehicular seat according to one embodiment described in the disclosure is provided with a recliner mounted on a back frame. The recliner has: a recliner plate; a recliner main body that oscillates the back frame with respect to the recliner plate; a bracket fixed to the recliner plate; and a hinge pin penetrating through the recliner main body, the recliner plate and the bracket. The recliner plate has a confirmation hole not overlapping with the recliner main body. The bracket has a main body part provided with a first through-hole and a part to be sensed extending from the main body part up to the confirmation hole and overlapping with the confirmation hole.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to vehicle seats. [Background technology]

[0002] A recliner installed in a vehicle seat arranged in a vehicle or the like has a hinge pin including an axle that penetrates a frame in the width direction of the seat (see Patent Document 1). In order to maintain the position and inclination of the central axis of the axle, which is the center of rotation of the recliner, the recliner is provided with a bracket (i.e., a base bracket) for aligning the axis of the hinge pin. The axis of the hinge pin is inserted into a through hole in the bracket for aligning the axis.

[0003] The bracket for axis alignment is formed to have a fixed dimension (i.e., height) in the width direction of the seat, so that the proximity sensor can detect if the bracket for axis alignment has been left unattached (i.e., the presence or absence of the bracket) during the seat manufacturing process. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-142582 A Summary of the Invention [Problem to be solved by the invention]

[0005] Depending on the design conditions of the vehicle seat, there may be a lack of space in the width direction of the seat, limiting the height of the bracket for axle alignment. In such a case, if the height of the bracket for axle alignment is smaller than the detection threshold of the proximity sensor, the proximity sensor cannot detect that the bracket has been left attached.

[0006] One aspect of the present disclosure aims to provide a vehicle seat that is capable of detecting whether an axis alignment bracket has been left attached in a recliner where space in the seat width direction is limited. [Means for solving the problem]

[0007] One aspect of the present disclosure is a vehicle seat (1) including a seat cushion (2), a seat back (3) capable of swinging in a fore-and-aft direction relative to the seat cushion (2), a back frame (4) supporting the seat back (3), and a recliner (6) attached to the back frame (4).

[0008] The recliner (6) includes a recliner plate (61), a recliner body (62) connected to a first surface (61A) of the recliner plate (61) and the back frame (4) and configured to swing the back frame (4) in the fore-and-aft direction of the seat relative to the recliner plate (61), a bracket (63) fixed to a second surface (61B) of the recliner plate (61) opposite the first surface (61A), and a hinge pin (64) that penetrates the recliner body (62), the recliner plate (61), and the bracket (63) in the seat width direction.

[0009] The recliner plate (61) has a confirmation hole (611) provided at a position not overlapping with the recliner body (62) in the axial direction of the hinge pin (64). The bracket (63) has a flat body portion (631) provided with a first through hole (631A) that determines the position of the central axis of the hinge pin (64), and a detected portion (632) that extends from the body portion (631) to the confirmation hole (611) and overlaps with the confirmation hole (611).

[0010] According to this configuration, a bracket detection sensor can be inserted into the confirmation hole (611) provided in the recliner plate (61) to confirm the presence or absence of the detection portion (632) of the bracket (63). Therefore, in a recliner with limited space in the seat width direction, it is possible to detect if the bracket (63) has been left attached at a height that cannot be detected by a proximity sensor.

[0011] In one aspect of the present disclosure, the recliner plate (61) may further include a positioning hole (612) provided at a position not overlapping with the recliner body (62) in the axial direction of the hinge pin (64). The bracket (63) may further include a positioning portion (633) extending from the body portion (631) to the positioning hole (612) and provided with a second through hole (633A) overlapping with the positioning hole (612). With this configuration, the position of the bracket (63) can be easily and accurately adjusted by aligning the positioning hole (612) with the second through hole (633A).

[0012] In one embodiment of the present disclosure, the detected portion (632) may be welded to the recliner plate (61). With this configuration, the detected portion (632) can be used as the welded portion. As a result, the area and weight of the bracket (63) can be reduced.

[0013] Note that the symbols in the above parentheses are examples showing the correspondence 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] FIG. 1 is a schematic perspective view showing a vehicle seat according to an embodiment. [Diagram 2] FIG. 2 is a schematic perspective view of a first side frame, a first lower arm, and a first recliner in the vehicle seat of FIG. [Diagram 3] FIG. 3 is a schematic perspective view of the first side frame, the first lower arm, and the first recliner shown in FIG. [Figure 4] FIG. 4 is a schematic exploded perspective view of the first recliner of FIG. [Diagram 5] 5 is a schematic perspective view of the first side frame, the first lower arm, and the first recliner of FIG. 2. FIG. [Figure 6] FIG. 6 is a schematic side view of the first recliner of FIG. [Figure 7] 7A is a schematic cross-sectional view taken along line VIIA-VIIA in FIG. 6, and FIG. 7B is a schematic cross-sectional view showing the first recliner in FIG. 7A without the bracket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First embodiment] [1-1. Configuration] The vehicle seat 1 shown in FIG. 1 includes a seat cushion 2, a seat back 3, a back frame 4, a first lower arm 5, a first recliner 6, a second lower arm 7, a second recliner 8, and a rod 9.

[0016] The vehicle seat 1 is used as a seat for a passenger vehicle. Specifically, the vehicle seat 1 constitutes the left seat in the rear of the passenger vehicle. On the right side of the vehicle seat 1, a two-seater seat is installed in which the right seat and the center seat are integrated.

[0017] In the following description and in each drawing, the directions refer to the directions when the vehicle seat 1 is assembled to a vehicle (i.e., a passenger car). In this embodiment, the seat width direction coincides with the left-right direction of the vehicle, and the front of the seat coincides with the front of the vehicle.

[0018] The seat cushion 2 is a portion for supporting the buttocks of a seated occupant. The seat back 3 is a portion for supporting the back of the seated occupant. The seat back 3 is capable of swinging relative to the seat cushion 2 in the front-rear direction of the seat.

[0019] The back frame 4 supports the seat back 3 and is capable of swinging in the front-rear direction of the seat together with the seat back 3. The back frame 4 has a first side frame 41, a second side frame 42, an upper frame 43, and a connecting member 44.

[0020] The first side frame 41 and the second side frame 42 extend in the up-down direction and are spaced apart from each other in the seat width direction. The first side frame 41 is disposed on the right side of the second side frame 42.

[0021] The upper frame 43 connects an upper end of the first side frame 41 and an upper end of the second side frame 42 in the seat width direction. The connecting member 44 connects the first side frame 41 and the second side frame 42 in the seat width direction below the upper frame 43.

[0022] <First lower arm> The first lower arm 5 is a plate-shaped frame configured to be attached to a vehicle.

[0023] The first lower arm 5 is connected to a lower end of the first side frame 41 via the first recliner 6. In other words, the first side frame 41 is connected to the vehicle by the first lower arm 5. In addition, the first lower arm 5 is disposed outward of the first side frame 41 in the seat width direction.

[0024] <First recliner> The first recliner 6 is connected to the first side frame 41 of the back frame 4 and the first lower arm 5.

[0025] The first recliner 6 is configured to swing the back frame 4 in the front-rear direction of the seat relative to the first lower arm 5 (that is, the vehicle and the seat cushion 2).

[0026] As shown in FIG. 2, the first recliner 6 has a recliner plate 61, a recliner main body 62, a bracket 63, a hinge pin 64, a release lever 65, a rocking force imparting spring 66, and a return spring 67.

[0027] (recliner plate) The recliner plate 61 is a flat member overlapped on the first lower arm 5 from the inner side in the seat width direction (i.e., the left side). The recliner plate 61 is disposed outward in the seat width direction than the first side frame 41. The thickness direction of the recliner plate 61 coincides with the seat width direction.

[0028] The recliner plate 61 has a first surface 61A to which the recliner body 62 shown in Fig. 3 is welded, and a second surface 61B to which the first lower arm 5 shown in Fig. 2 is welded. The first surface 61A is a plate surface on the inner side in the seat width direction, and the second surface 61B is a plate surface on the opposite side to the first surface 61A, i.e., a plate surface on the outer side in the seat width direction. Note that some parts of the first recliner 6, such as the rocking force imparting spring 66, are not shown in Fig. 3.

[0029] As shown in FIG. 4, the recliner plate 61 has a confirmation hole 611, a positioning hole 612, and a pin insertion hole 613.

[0030] The confirmation hole 611 is a through hole for confirming the presence or absence of the bracket 63 during the manufacturing process of the vehicle seat 1. The confirmation hole 611 is disposed at a position that does not overlap with the recliner main body 62 in the axial direction of the hinge pin 64 (i.e., the seat width direction). In this embodiment, the confirmation hole 611 is disposed seat front of the pin insertion hole 613, but the position of the confirmation hole 611 is not limited thereto.

[0031] The positioning hole 612 is a through hole for positioning the bracket 63 in the manufacturing process of the vehicle seat 1. The positioning hole 612 is disposed at a position that does not overlap with the recliner main body 62 in the axial direction of the hinge pin 64. In this embodiment, the positioning hole 612 is disposed behind the pin insertion hole 613, but the position of the positioning hole 612 is not limited thereto.

[0032] The pin insertion hole 613 is a through hole into which the shaft portion 642 of the hinge pin 64 is inserted. The opening area (that is, the hole diameter) of the pin insertion hole 613 is larger than the opening area of ​​each of the confirmation hole 611 and the positioning hole 612.

[0033] (Recliner body) The recliner body 62 is a known device that is connected to the first surface 61A of the recliner plate 61 and the back frame 4, and is configured to rock the back frame 4 relative to the recliner plate 61 in the front-rear direction of the seat.

[0034] The recliner body 62 has a first portion 621 and a second portion 622 that rotates relative to the first portion 621. As shown in Figure 3, the first portion 621 is fixed to the first side frame 41 by welding. As shown in Figure 5, the second portion 622 is fixed to the recliner plate 61 by welding. Note that some parts of the first recliner 6, such as the return spring 67, are not shown in Figure 5.

[0035] Recliner body 62 has a locking mechanism that restricts relative rocking of first part 621 with respect to second part 622. The locking mechanism is switched by operation of release lever 65 between a locked state that restricts rocking and a released state that allows rocking.

[0036] (bracket) The bracket 63 is a flat plate-like member for aligning the axis of the hinge pin 64 (that is, for adjusting the inclination and position of the central axis).

[0037] Bracket 63 is fixed to second surface 61B of recliner plate 61. In other words, bracket 63 is disposed so as to sandwich recliner plate 61 together with recliner main body 62.

[0038] The thickness of bracket 63 is smaller than the thickness of recliner plate 61. The thickness of bracket 63 is, for example, 1 mm or less. As shown in FIG.

[0039] The main body 631 is a flat plate-like portion provided with a first through hole 631A through which the shaft 642 of the hinge pin 64 is inserted to determine the position of the central axis of the hinge pin 64. The inner diameter of the first through hole 631A is approximately the same as the maximum outer diameter of the shaft 642 of the hinge pin 64. The central axis of the first through hole 631A is the same as the central axis of the oscillation of the first recliner 6.

[0040] The main body portion 631 entirely overlaps with the recliner plate 61 and the recliner main body 62 in the axial direction of the hinge pin 64. The main body portion 631 has an upper end portion welded to the recliner plate 61 by a weld bead W1.

[0041] The detected portion 632 is an arm-shaped (i.e. band-shaped) portion extending from the main body portion 631 to the confirmation hole 611. The detected portion 632 extends from a position below the first through-hole 631A of the main body portion 631 toward the front of the seat.

[0042] Detected portion 632 has a tip portion 632A that overlaps with confirmation hole 611. Tip portion 632A completely covers confirmation hole 611. Detected portion 632 is welded to recliner plate 61 by weld bead W2.

[0043] The weld bead W2 is provided on the lower end of the detected portion 632 in a region behind the seat (i.e., closer to the main body portion 631) than the tip portion 632A. Also, a portion of the weld bead W2 overlaps with the recliner main body 62 in the axial direction of the hinge pin 64.

[0044] The positioning portion 633 is an arm-shaped portion extending from the main body portion 631 to the positioning hole 612. The positioning portion 633 extends toward the rear of the seat from a position below the first through-hole 631A of the main body portion 631. In this embodiment, the extending direction of the positioning portion 633 is parallel to and opposite to the extending direction of the detected portion 632.

[0045] The positioning portion 633 has a second through hole 633A that overlaps with the positioning hole 612. The second through hole 633A has a smaller diameter than the positioning hole 612 and entirely overlaps with the positioning hole 612. In a manufacturing process of the vehicle seat 1, a positioning jig is inserted into the positioning hole 612 and the second through hole 633A, thereby positioning the bracket 63.

[0046] 7A, in the manufacturing process of vehicle seat 1, rod-shaped detection sensor S is inserted into confirmation hole 611 of recliner plate 61 from the inside in the seat width direction. When bracket 63 is correctly positioned, the tip of detection sensor S comes into contact with detected portion 632 of bracket 63 within confirmation hole 611. This detects the presence of bracket 63.

[0047] 7B, when the bracket 63 is not disposed on the recliner plate 61, the tip of the detection sensor S passes through the confirmation hole 611. Therefore, the absence of the bracket 63 is detected.

[0048] In the manufacturing process of vehicle seat 1, after recliner plate 61, recliner body 62, and bracket 63 are arranged in predetermined positions, detection sensor S is inserted into confirmation hole 611 to confirm attachment of bracket 63. After that, each component is welded.

[0049] (hinge pin) 4 passes through the recliner body 62, the recliner plate 61, and the bracket 63 in the seat width direction. The central axis of the hinge pin 64 coincides with the central axis of the swing of the first recliner 6.

[0050] The hinge pin 64 has a head portion 641 and a shaft portion 642. The head portion 641 contacts the recliner main body 62 from the inside in the seat width direction. The shaft portion 642 extends from the head portion 641 to the outside in the seat width direction.

[0051] 5, the tip of the shaft portion 642 protrudes outward in the seat width direction beyond the bracket 63. In addition, the shaft portion 642 is welded to the release lever 65 by a weld bead W3.

[0052] (Release lever) The release lever 65 switches the locked state of the recliner body 62. A wire (not shown) is connected to the release lever 65.

[0053] When the release lever 65 rotates from the locked position due to the tension of the wire, the hinge pin 64 connected to the release lever 65 rotates on its axis. This rotation of the hinge pin 64 rotates a cam disposed inside the recliner body 62, releasing the lock. When the tension on the release lever 65 by the wire is released, the release lever 65 returns to the locked position by the return spring 67 (see FIG. 2).

[0054] (Swing force applying spring) A rocking force imparting spring 66 shown in FIG. 2 constitutes a rocking force generating mechanism that imparts a rocking force to the first side frame 41 relative to the recliner plate 61.

[0055] The rocking force imparting spring 66 is connected to the first side frame 41 and the recliner plate 61. When the recliner body 62 is unlocked, the elastic force of the rocking force imparting spring 66 causes the first side frame 41 to rock toward the front of the seat.

[0056] <Second lower arm> The second lower arm 7 shown in FIG. 1 is a plate-shaped frame configured to be attached to a vehicle.

[0057] The second lower arm 7 is connected to the back frame 4 at a position separated from the first lower arm 5 in the seat width direction. Specifically, the second lower arm 7 is connected to a lower end of the second side frame 42 via the second recliner 8. In other words, the second side frame 42 is connected to the vehicle by the second lower arm 7.

[0058] <Second recliner> The second recliner 8 is connected to the second side frame 42 of the back frame 4 and the second lower arm 7.

[0059] The second recliner 8 is a known device configured to cooperate with the first recliner 6 to rock the back frame 4 in the front-rear direction of the seat relative to the second lower arm 7 (that is, the vehicle and the seat cushion 2).

[0060] <Rod> The rod 9 is a cylindrical member that connects the first lower arm 5 and the second lower arm 7 in the seat width direction.

[0061] The rod 9 penetrates in the thickness direction of each of the first lower arm 5 and the second lower arm 7. The rod 9 is fixed to the first lower arm 5 and the second lower arm 7 by, for example, welding.

[0062] [1-2. Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) A bracket detection sensor can be inserted into confirmation hole 611 provided in recliner plate 61 to confirm the presence or absence of detectable portion 632 of bracket 63. Therefore, in a recliner with limited space in the seat width direction, it is possible to detect if bracket 63 has been left unattached at a height that cannot be detected by a proximity sensor.

[0063] (1b) By aligning the positioning hole 612 of the recliner plate 61 with the second through-hole 633A of the bracket 63, the position of the bracket 63 can be easily and accurately adjusted.

[0064] (1c) By welding the detected portion 632 to the recliner plate 61, the detected portion 632 can be used as a welded portion. As a result, the area and weight of the bracket 63 can be reduced.

[0065] 2. Other embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

[0066] (2a) In the vehicle seat of the above embodiment, the bracket does not necessarily have to have a positioning portion. (2b) In the vehicle seat of the above embodiment, the detected portion of the bracket does not necessarily have to be welded to the recliner plate.

[0067] (2c) In the vehicle seat of the above embodiment, the lower arm does not necessarily have to be fixed to the vehicle. In other words, the lower arm may be fixed to a cushion frame that supports the seat cushion.

[0068] (2d) The vehicle seat of the above embodiment can also be applied to seats used in automobiles other than passenger cars, and seats used in vehicles other than automobiles, such as railroad cars, ships, and aircraft.

[0069] (2e) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. In addition, a part of the configuration of the above embodiments may be omitted. In addition, at least a part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. Note that all aspects included in the technical idea identified from the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0070] 1...vehicle seat, 2...seat cushion, 3...seat back, 4...back frame, 5...First lower arm, 6...First recliner, 7...Second lower arm, 8...second recliner, 9...rod, 41...first side frame, 42... second side frame, 43... upper frame, 44... connecting member, 61...recliner plate, 61A...first surface, 61B...second surface, 62... recliner body, 63... bracket, 64... hinge pin, 65... release lever, 66: Swing force applying spring; 67: Return spring; 611: Confirmation hole; 612: Positioning hole; 613: pin insertion hole; 621: first portion; 622: second portion; 631: main body portion; 631A...first through hole, 632...detection part, 632A...tip part, 633...positioning part, 633A...Second through hole, 641...Head, 642...Shaft.

Claims

1. Seat cushion and a seat back that is pivotable in a front-rear direction relative to the seat cushion; A back frame supporting the seat back; a recliner attached to the back frame; Equipped with The recliner is Recliner plate, a recliner body connected to a first surface of the recliner plate and the back frame and configured to swing the back frame in a seat front-rear direction relative to the recliner plate; a bracket fixed to a second surface of the recliner plate opposite to the first surface; a hinge pin that penetrates the recliner body, the recliner plate, and the bracket in a seat width direction; having The recliner plate has a confirmation hole provided at a position not overlapping with the recliner body in the axial direction of the hinge pin, The bracket is a flat body portion having a first through hole for determining the position of a central axis of the hinge pin; a detection target portion extending from the main body portion to the confirmation hole and overlapping with the confirmation hole; A vehicle seat having the above features.

2. 2. The vehicle seat according to claim 1, The recliner plate further includes a positioning hole provided at a position not overlapping with the recliner body in an axial direction of the hinge pin, The bracket further has a positioning portion extending from the main body portion to the positioning hole and having a second through hole that overlaps with the positioning hole.

3. The vehicle seat according to claim 1 or 2, The detected portion is welded to the recliner plate.

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