JP2012061096A - Connecting device of vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To excellently maintain turning properties of a seat back regardless of long-term use.SOLUTION: In a support part 84 freely slidably supporting a ratchet in a holding ring 80, which holds the ratchet attached on the seat back side and a guide attached to the seat cushion side rotationally relatively, a projection part 86 is formed so that a side wall 86a surrounds the space in elliptic form and the ratchet is supported slidably by the end edge 86b of the side wall 86a. When the space surrounded by the side wall 86a is filled with a lubricant previously, the lubricant can be spread over the sliding surface of the ratchet and leakage of the filled lubricant can be prevented, and consequently, shortage of lubrication on the sliding surface of the ratchet can be prevented even after long-term use.

Description

  The present invention relates to a connecting device for a vehicle seat.

  Conventionally, as this type of vehicle seat coupling device, there are a disk-shaped guide attached to a cushion frame as a skeleton material of a seat cushion, and a pivot attached to a back frame as a skeleton material of a seat back. Has been proposed that includes a disc-shaped ratchet that can be used, and a holding member that is attached to the outer periphery of the ratchet and the guide, is fixed to the guide, and holds the ratchet slidably (see, for example, Patent Document 1). . In this device, a long member is wound as a holding member along the outer periphery of the ratchet and guide, and the tips of the protrusions formed at a plurality of locations in the circumferential direction are brought into point contact with the contact surface of the ratchet. Thus, the ratchet is slidably held.

JP 2009-165582 A

  In such a vehicle seat coupling device, in order to improve the pivotability of the seat back, it is common to apply a lubricant (grease) to the sliding surface between the ratchet and the holding member. However, if lubrication is lost on the sliding surface due to aging, wear of the sliding surface proceeds and the pivotability of the seat back is deteriorated.

  The main object of the present invention is to maintain good rotation of a sheet member regardless of long-term use.

  The present invention adopts the following means in order to achieve the main object described above.

The connecting device for a vehicle seat according to the present invention includes:
First and second connecting members respectively attached to different members for the seat and capable of relative rotation with each other;
A holding member attached to the outer periphery of the first and second connecting members, fixed to the second connecting member, and slidably holding the first connecting member;
With
The holding member is formed with a protruding portion that protrudes so as to surround the space in which the side wall can be filled with the lubricant and to slidably support the first connecting member at an edge of the side wall. And

  In the vehicle seat coupling device of the present invention, the first coupling member is fixed to the second coupling member on the outer peripheral portions of the first and second coupling members respectively attached to different members for the seat and the first coupling member is slid. A protrusion that is attached to the holding member so as to be movable, and that protrudes so as to slidably support the first connecting member at the edge of the side wall while surrounding the space in which the side wall can be filled with the lubricant. Form. Thereby, since the closed space is formed by the side wall of the protruding portion and the sliding surface of the first connecting member, the leakage of the lubricant can be suppressed by filling the space with the lubricant in advance. It is possible to maintain a state in which the lubricant is spread over the sliding surface of the first connecting member for a long time. As a result, it is possible to maintain good rotation of the sheet member regardless of long-term use.

  In such a vehicle seat coupling device of the present invention, the holding member is formed such that the protruding portion is disposed in a plurality of locations in the circumferential direction, and the side wall of the protruding portion is formed in a substantially circular shape to surround the space. The protrusions are annularly arranged on the inner peripheral side and the outer peripheral side over the entire circumference, respectively, and the side walls of the inner peripheral side protrusions and the outer peripheral side protrusions. Can be formed so as to surround the space in a ring shape. If it carries out like this, the contact area of a holding member and a 1st connection member can be reduced, and slidability can be improved further. Here, “substantially circular” includes not only a perfect circle but also an oval.

  Further, in the vehicle seat coupling device of the present invention, the projecting portion is projected in the rotational axis direction so as to slide with a surface orthogonal to the rotational axis direction of the first coupling member. You can also. In this way, the radial size of the device can be made more compact.

1 is an exploded perspective view of a vehicle seat coupling device 10 according to an embodiment of the present invention. It is an external appearance block diagram of the vehicle seat 90 in which the coupling device 10 of the Example was incorporated. It is an external appearance perspective view in the state where connecting device 10 was assembled. It is sectional drawing which shows the AA cross section of the coupling device 10 of FIG. It is explanatory drawing which shows the state by which the relative rotation of the ratchet 20 and the guide 30 is locked by the locking mechanism 40. FIG. 6 is an explanatory view showing a state where the lock of relative rotation between the ratchet 20 and the guide 30 is released by the lock mechanism 40. It is the elements on larger scale which expanded B area | region of sectional drawing of FIG. It is explanatory drawing which shows the mode of the assembly | attachment of the connection apparatus. It is an external view which shows the external appearance of the holding ring 80 of an Example. It is an external view which shows the external appearance of the holding ring 180 of a modification. It is an external view which shows the external appearance of the holding ring 280 of a modification.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is an exploded perspective view of a vehicle seat coupling device 10 according to an embodiment of the present invention, and FIG. 2 is an external configuration diagram of a vehicle seat 90 in which the coupling device 10 of the embodiment is incorporated. 3 is an external perspective view in a state in which the coupling device 10 of the embodiment is assembled, and FIG. 4 is a cross-sectional view showing an AA cross section of the coupling device 10 in FIG. 3.

  As shown in FIG. 2, the connecting device 10 for a vehicle seat according to the embodiment has a disk shape for connecting a seat cushion 92 as a seating portion and a seatback 94 as a backrest portion so that the backrest angle can be adjusted (FIG. 3). The recliner of the seat back 94 is attached to the left and right ends of the pivot shaft of the seat back 94. As shown in FIG. 1, the vehicle seat coupling device 10 includes a ratchet 20 (corresponding to a “first coupling member” of the present invention) attached to a back frame (not shown) as a frame material of the seat back 94, A guide 30 (corresponding to the “second connecting member” of the present invention) attached to a cushion frame (not shown) as a skeleton material of the seat cushion 92 and a space between the ratchet 20 and the guide 30 (see FIG. 4). ) A lock mechanism 40 that locks and unlocks the rotation of the ratchet 20 with respect to the guide 30, and is attached so as to cover the outer periphery of the ratchet 20 and the guide 30, and allows relative rotation between the ratchet 20 and the guide 30. While holding the ratchet 20 and the guide 30, a holding ring 80 (corresponding to the “holding member” of the present invention) is provided.In the embodiment, the seat back 94 is urged forward by a return spring (not shown) with respect to the seat cushion 92. When the lock mechanism 40 is not locked, the seat back 94 is urged by the urging force of the return spring. The seat cushion 92 is folded forward and folded on the seat cushion 92.

  As shown in FIG. 1, the ratchet 20 is formed in a disc shape, and a cylindrical projecting portion 24 projecting in the plate thickness direction from the outer peripheral edge of the disc portion 22 toward the guide 30 is formed by half punching. . On the inner peripheral surface of the cylindrical projecting portion 24, there are an inner tooth portion 24a in which inner teeth are formed and a smooth surface portion having no inner teeth slightly projecting radially inward from the tooth tips of the inner teeth of the inner tooth portion 24a. 24b are formed in two places in axial symmetry. The disk portion 22 has a through hole 26 formed in the center, and a plurality of dowels 28a to 28f protruding in a cylindrical shape in the thickness direction are formed on the outer surface side so as to surround the through hole 26. Although not shown, the dowels 28a to 28f are welded in a state of being fitted into dowel holes formed in the back frame of the seat back 94, so that the ratchet 20 is integrally fixed to the back frame. ing.

  As shown in FIG. 1, the guide 30 is formed in a disk shape having an outer diameter larger than that of the ratchet 20, and a cylindrical protruding portion 34 that protrudes from the outer peripheral edge of the disk portion 32 toward the ratchet 20 in the plate thickness direction. It is formed by half punching. The cylindrical protrusion 34 of the guide 30 is formed so that the diameter of the inner peripheral surface thereof is slightly larger than the diameter of the outer peripheral surface of the cylindrical protrusion 24 of the ratchet 20, and the ratchet 20 and the guide 30 can rotate relative to each other. The cylindrical protrusion 32 of the ratchet 20 is fitted. The disk portion 32 has guide grooves (a pole guide groove 35 and a slide cam guide groove 36) that are recessed in a cross shape in the plate thickness direction formed on the inner surface side by half punching. The disk portion 32 has a through hole 37 through which a cam shaft portion 74, which will be described later, is inserted in the center portion, and a plurality of dowels 38a to 38d protruding in the plate thickness direction surround the through hole 37 on the outer surface side. It is formed as follows. Although not shown, the dowels 38a to 38d are welded in a state of being fitted into dowel holes formed in the cushion frame of the seat cushion 92, so that the guide 30 is integrally fixed to the cushion frame. ing.

  As shown in FIG. 1, the locking mechanism 40 includes an inner tooth portion 24a formed on the inner peripheral surface of the cylindrical protrusion 24 of the ratchet 20, and an outer tooth portion 52a that can mesh with the inner tooth portion 24a. Two pawls 50, a slide cam 60 slidable between a lock position where the outer teeth 52a of the pole 50 are engaged with the inner teeth 24a of the ratchet 20 and an unlock position where the engagement is released, and the slide cam 60 is driven And a winding spring 78 that urges the hinge cam 70 to rotate in one direction (clockwise direction in FIG. 1).

  As shown in FIG. 1, the pole 50 has two legs 54, 56 and is formed in an arch shape that is curved in an arc along the inner peripheral surface of the cylindrical protrusion 24 of the ratchet 20. Are formed with an external tooth portion 52a that meshes with the internal tooth portion 24a of the cylindrical protruding portion 24, and a hook hook 58 on which an hook portion 61 (to be described later) is hooked is formed on the inner surface side. The pole 50 is accommodated in a pole guide groove 35 formed in the radial direction (vertical direction in FIG. 1) of the disk portion 32 of the guide 30, and the vertical movement is guided along the pole guide groove 35. ing.

  As shown in FIG. 1, the slide cam 60 is formed in a vertically symmetrical frame shape having a head portion 61 and shoulder portions 62, 63, and the head portion 61 is hung on a hook hook 58 of a pole 50. The hook portion 61a is depressed right next to the shoulder portions 62, 63 in FIG. 1 and recessed portions 64, 65 recessed from the shoulder portions 62, 63 are pressed by a cam pin 72 (to be described later) of the slide cam 60 at the center portion. Each cam hole 66 is formed. The slide cam 60 is accommodated in a slide cam guide groove 36 formed in a direction perpendicular to the pole guide groove 35 of the disk portion 32 of the guide 30 (left and right direction in FIG. 1). A horizontal movement is guided along.

  As shown in FIG. 1, the hinge cam 70 is formed by a cam pin 72 that presses the inner surface of the cam hole 66 of the slide cam 60 and a cam shaft portion 74 that forms the rotation axis of the cam pin 72. The hinge cam 70 is connected to a rotation shaft 96a (see FIG. 2) of the operation lever 96 for adjusting the backrest angle of the seat back 94 with respect to the seat cushion 92. It is designed to rotate by operation.

  As shown in FIG. 1, the winding spring 78 is formed by winding a rectangular plate material in a spiral shape, and its inner end side is locked to the cam shaft portion 74 of the hinge cam 70, and its outer end side is the guide 30. And is latched by a spring-engaging projection 39 formed on the surface.

  FIG. 5 shows a state where the relative rotation of the ratchet 20 and the guide 30 is locked by the lock mechanism 40, and FIG. 6 shows a state where the lock of the relative rotation of the ratchet 20 and the guide 30 is released by the lock mechanism 40. Show. The lock mechanism 40 is locked when the operation lever 96 is not pulled up, that is, when the hinge cam 70 is rotated counterclockwise in FIG. 5 by the urging force of the winding spring 78 (as described above, in FIG. Is performed in a state of rotating in a clockwise direction as viewed from the opposite side of the rotation axis direction. In this state, the slide cam 60 is pressed counterclockwise by the cam pin 72 of the hinge cam 70 and slides leftward in the drawing along the slide cam guide groove 36, and the pawl 50 has the legs 54 and 56 with the slide cam. It rides on the shoulder 56 of 60 and is pushed outward along the pole guide groove 35 in the radial direction. For this reason, the outer teeth 52 a of the pole 50 and the inner teeth 24 a of the ratchet 20 are engaged (see FIG. 5), and the rotation of the ratchet 20 is locked with respect to the guide 30. On the other hand, the lock mechanism 40 is unlocked in a state where the hinge cam 70 is rotated in the clockwise direction against the urging force of the winding spring 78 by the pulling operation of the operation lever 96. In this state, the slide cam 60 is pressed clockwise by the cam pin 72 of the hinge cam 70 and slides rightward in the drawing along the slide cam guide groove 36, and the pole 50 is hooked by the hook portion 61 a of the slide cam 60. The leg portions 54 and 56 are engaged with the concave portions 64 and 65 of the slide cam 60 by being hooked by the hook 58. For this reason, the pole 50 is drawn inward in the radial direction along the pole guide groove 35, and the meshing between the outer tooth portion 52a of the pole 50 and the inner tooth portion 24a of the ratchet 20 is released (see FIG. 6). The ratchet 20 is unlocked. Thereby, since the fixation of the backrest angle of the seat back 94 is released, the backrest angle can be adjusted by tilting the seat back 94 forward or pushing it backward. When the lifting operation of the operation lever 96 is released after adjusting the backrest angle, the lock mechanism 40 returns to the locked state in which the inner teeth portion 24a of the ratchet 20 and the outer teeth portion 52a of the pole 50 are engaged. Fixed at the backrest angle. As described above, the inner peripheral surface of the cylindrical projecting portion 24 of the ratchet 20 has an area where the smooth surface portion 24b is formed. Therefore, even if the lifting operation of the operation lever 96 is released, the pole 50 The lock mechanism 40 is not locked when the outer tooth portion 52a is within the range where the outer surface 52a hits the smooth surface portion 24b of the ratchet 20, and in the embodiment, when the seat back 94 is within the angle range ahead of the backrest angle at which the seatback 94 is in the upright posture. Therefore, in this case, the seat back 94 is tilted forward by the urging force of the return spring described above and folded on the seat cushion 92.

  As shown in FIG. 1, the retaining ring 80 includes a cylindrical portion 82 having an inner diameter substantially the same as the outer diameter of the guide 30, and a cylindrical protrusion of the ratchet 20 that extends radially inward from the end of the cylindrical portion 82. An annular support portion 84 that supports the back surface side of the portion 24 (the surface orthogonal to the rotation axis direction). The support portion 84 is formed with protruding portions 86 protruding toward the ratchet 20 at predetermined angular intervals in the circumferential direction. In the embodiment, a total of eight protrusions 86 are formed every 45 degrees. The protrusion 86 supports the ratchet 20 slidably at its tip, as shown in the partially enlarged view of FIG. 7 in which the region B in the sectional view of FIG. 4 is enlarged.

  FIG. 8 is an explanatory diagram showing how the retaining ring 80 is assembled. The vehicle seat coupling device 10 according to the embodiment is assembled by incorporating a lock mechanism 40 (two poles 50, a slide cam 60, and a hinge cam 70) into the guide 30 and fitting the ratchet 20 to the guide 30. After being accommodated in the cylindrical portion 82 of the holding ring 80 (assembly process), as shown in FIG. 8, the end of the cylindrical portion 84 of the holding ring 80 is bent inward in the radial direction (caulking process). . Accordingly, the holding ring 80 is fixed to the guide 30 and supports the ratchet 20 so as to be slidable, and holds the ratchet 20 and the guide 30 so as to be relatively rotatable.

  FIG. 9 is an external view showing the external appearance of the retaining ring 80 (projecting portion 86). As shown in the drawing, the protruding portion 86 protrudes from the bottom surface of the support portion 84 so that a side wall 86a having substantially the same height surrounds the space in an oval shape, and the ratchet 20 is slidable by the edge 86b of the side wall 86a. Can be supported. For this reason, the space formed by the side wall 86a of the protrusion 86 and the sliding surface of the ratchet 20 (the back surface of the cylindrical protrusion 24) is a closed space. In the embodiment, a lubricant (grease) is preliminarily filled in the space, and the lubricant is spread over the sliding surface of the ratchet 20 and the filled lubricant is prevented from leaking. Therefore, the sliding surface of the ratchet 20 does not lose lubrication even after long-term use.

  According to the vehicle seat coupling device 10 of the embodiment described above, the side wall 86a is formed in an oval shape in the support portion 84 of the ratchet 20 in the holding ring 80 that holds the ratchet 20 and the guide 30 so as to be relatively rotatable. Since the protrusion 86 protruding so as to slidably support the ratchet 20 at the edge 86b of the side wall 86a is formed, the space surrounded by the side wall 86a is filled with a lubricant in advance, so that the ratchet 20 In addition, the lubricant can be spread over the sliding surface and the filled lubricant can be prevented from leaking, so that the sliding surface of the ratchet 20 can be prevented from being out of lubrication even after long-term use. As a result, the pivotability of the seat back 94 attached to the ratchet 20 can be maintained in a good state. Further, since it is possible to maintain the state where the lubricant is spread over the sliding surface of the ratchet 20 over a long period of time, even if the level of assembly accuracy and manufacturing tolerance is slightly loosened, sliding failure is prevented. And good quality can be ensured. Further, since the protruding portion 86 of the holding ring 80 protrudes in the rotation axis direction and the surface orthogonal to the rotation axis direction of the ratchet 20 is slidably supported, the size of the apparatus in the radial direction can be made more compact. can do.

  In the vehicle seat coupling device 10 of the embodiment, the protruding portion 86 of the holding ring 80 is protruded so that the side wall 86a surrounds the space in an oval shape and the ratchet 20 is slidably supported by the edge 86b of the side wall 86a. However, the present invention is not limited to this, and as shown in the retaining ring 180 of the modified example of FIG. 10, the side wall 186a surrounds the space in a circular shape and the ratchet is formed at the edge 186b of the side wall 186a. 20 may be slidably supported, or the side wall 86a may be an oval shape that surrounds the space 86 and the side wall 186a may have a circular shape that surrounds the space. Good. Alternatively, as shown in the holding ring 280 of the modified example of FIG. 11, by forming the inner peripheral side protruding portion 286 and the outer peripheral side protruding portion 287 over the entire circumference of the support portion 284, The space may be surrounded annularly by the side wall 286a of the protruding portion 286 and the side wall 287a of the protruding portion 287 on the outer peripheral side, and the ratchet 20 may be slidably supported by the end edges 286b and 287b of the two side walls 286a and 287a. . As described above, any shape of the protruding portion may be provided as long as the side wall surrounds the space in which the lubricant can be filled and the ratchet 20 is slidably supported by the edge of the side wall. I do not care. As for the shape of the edge of the side wall, the tip may be in flat contact with the ratchet 20, or the tip may be formed in an R shape and brought into line contact with the ratchet 20.

  In the vehicle seat coupling device 10 according to the embodiment, the holding ring 80 slidably supports the surface orthogonal to the rotation axis direction of the ratchet 20. However, the present invention is not limited thereto, and the outer peripheral surface of the ratchet 20 is supported. It may be slidably supported. In this case, a protruding portion may be formed from the cylindrical portion 82 in the radial direction.

  In the vehicle seat coupling device 10 of the embodiment, the lock mechanism 40 is configured by the two poles 50, the slide cam 60, the hinge cam 70, and the winding spring 78. However, the present invention is not limited to this, and the ratchet 20 Any locking mechanism may be used as long as the relative rotation between the guide 30 and the guide 30 can be locked and unlocked.

  In the embodiment, the vehicular seat connecting device according to the present invention is applied to a reclining device that connects the seat cushion 92 and the seat back 94 so that the backrest angle of the seat back 94 can be adjusted, but the present invention is not limited thereto. It is good also as what is applied to what connects a seat back to a vehicle floor so that rotation is possible, and what is applied to what connects a seat cushion to a vehicle floor so that rotation is possible. The ottoman device that supports the user's lower leg portion may be applied to a vehicle floor or a seat cushion that is rotatably connected. In these cases, the locking mechanism may not be provided.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention is applicable to the automobile industry.

  DESCRIPTION OF SYMBOLS 10 Vehicle seat coupling device, 20 ratchet, 22 disc part, 24 cylindrical projection part, 24a internal tooth part, 24b smooth surface part, 26 through hole, 28a-28f dowel, 30 guide, 32 disc part, 34 cylindrical projection part, 35 Pole guide groove, 36 Slide cam guide groove, 37 Through hole, 38a to 38d Dowel, 39 Spring hooking projection, 40 Lock mechanism, 50 Pole, 52 Top, 52a External teeth, 54, 56 Leg, 58 Hook Hang, 60 slide cam, 61 head, 61a hook, 62, 63 shoulder, 64, 65 recess, 66 cam hole, 70 hinge cam, 72 cam pin, 74 cam shaft, 78 coil spring, 80, 180, 280 Ring, 82 Cylindrical part, 84 Support part, 86, 186, 286 Protruding part, 86a, 186a, 286a Side wall 86b, 186b, 286b edge, 90 a vehicle seat, 92 seat cushion 94 seat back 96 operation lever, 96a pivot shaft.

Claims (4)

A vehicle seat coupling device comprising:
First and second connecting members respectively attached to different members for the seat and capable of relative rotation with each other;
A holding member attached to the outer periphery of the first and second connecting members, fixed to the second connecting member, and slidably holding the first connecting member;
With
The holding member is formed with a protruding portion that protrudes so as to surround the space in which the side wall can be filled with the lubricant and to slidably support the first connecting member at an edge of the side wall. A vehicle seat coupling device.   The vehicle seat coupling device according to claim 1, wherein the holding member is formed so that the protruding portion is disposed in a plurality of locations in a circumferential direction, and a side wall of the protruding portion is formed in a substantially circular shape so as to surround the space. .   In the holding member, the protrusions are arranged annularly over the entire circumference on the inner peripheral side and the outer peripheral side, respectively, and the side walls of the inner peripheral side protrusions and the outer peripheral side protrusions are annular. The vehicle seat coupling device according to claim 1, wherein the vehicle seat coupling device is formed so as to surround the space.   4. The vehicle seat according to claim 1, wherein the protruding portion is protruded in a rotation axis direction so as to slide with a surface orthogonal to the rotation axis direction of the first connecting member. 5. Connecting device.

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