JP5533952B2 - Reclining device for vehicle seat - Google Patents

Description

  The present invention relates to a reclining device for a vehicle seat that locks a seat back by adjusting an angle with respect to a seat cushion.

For example, as shown in FIG. 1 of Patent Document 1, a conventional reclining device includes a tooth member provided on a seat back side and having teeth on an arc portion, and a guide member provided on a seat cushion side and having a pair of guide portions. And two slide members that move up and down while being guided by the pair of guide portions, and a rotation member that is rotatably provided on the guide member. The turning member pushes the lower slide member upward by rotating from the unlocked state to the locked state by the urging force of the urging member. Then, the lower slide member pushes the upper slide member, and the teeth formed on the upper slide member mesh with the teeth of the tooth member. The upper and lower slide members are formed with inclined surfaces, and the inclined surfaces are in contact with each other. Therefore, when the lower slide member is pressed against the upper slide member, the direction of the force is changed by the inclined surface, and the lower and upper slide members are stretched between the pair of guide portions. Thus, the seat back can be locked in a state in which the seat back is prevented from rattling.
Japanese Patent Publication No. 5-60924

  However, if the upper and lower slide members are stretched between the pair of guide parts before the upper slide member meshes with the tooth member, the upper slide member is difficult to slide to the tooth member side and meshes with the tooth member. Problems such as becoming difficult. Then, this invention makes it a subject to provide the reclining apparatus of the vehicle seat which can prevent the backlash with respect to the seat cushion of a seat back smoothly and reliably.

In order to solve the above-mentioned problems, the present invention is a reclining device for a vehicle seat having a configuration as described in each claim. According to the first aspect of the present invention, the tooth member is provided on one side of the seat back and the seat cushion and has teeth on the arc portion, and the other member is provided and has a plurality of guide portions. A first slide structure comprising a guide member, a first and second slide members that are guided and moved by a first pair of guide portions of the guide portions, and a second pair of guide portions; And a second slide member composed only of a third slide member that moves while being guided by the guide portion, and a rotation member that is rotatably provided on the guide member. Each of the first and third slide members has teeth that mesh with the teeth of the tooth members. The rotating member pushes the first slide constituent body when meshing the teeth of the first slide member with the teeth of the tooth member when rotating in the locking direction from the unlocked state, and the third slide member It has a pressing part which meshes the teeth of the third slide member with the teeth of the tooth member . And between the first and second slide members, the first and second slide members cooperate with each other with a force for pressing the second slide member against the first slide member. There is provided a force conversion mechanism for converting to a force that stretches between the two.

  Therefore, when the reclining device is changed from the unlocked state to the locked state, first, the first slide member meshes with the tooth member. Thereafter, the second slide member pushes the first slide member, and the first and second slide members are stretched between the pair of guide portions. Therefore, the first slide member can be meshed with the tooth member smoothly and reliably. Thereafter, the first and second slide members are stretched between the pair of guide portions, and the seat back is locked in a state in which the seat cushion is prevented from rattling.

According to the first aspect of the present invention, the rotating member moves the second slide member in the direction away from the first slide member when rotating in the unlocking direction from the locked state. The first and second slide members are released from the tension release portion, and the first and second slide members are released from the first slide member after the first and second slide members are released from the first slide member. And a mesh release portion for releasing the mesh of the teeth from the teeth of the tooth member.

  Therefore, when the reclining device changes from the locked state to the unlocked state, first, the first and second slide members that are stretched between the pair of guide portions are released. After that, the first slide member is moved to release the engagement with the tooth member. Therefore, the first slide member can be smoothly and reliably released from the tooth member.

According to the second aspect of the present invention, the first pressing portion and the mesh release portion of the rotating member are configured as a wall surface of the long groove into which the protrusion formed on the first slide member is inserted, or the first slide. It is comprised by the protrusion part which penetrates into the long groove formed in the member. Therefore, both the first pressing portion and the mesh release portion can be formed by a simple long groove constituting wall surface. Or it can be formed by protrusions.

It is a side view of a vehicle seat. It is a disassembled perspective view of a reclining apparatus. It is front sectional drawing of the reclining apparatus in a locked state. It is front sectional drawing of the reclining apparatus in the middle of making it into an unlocked state. It is front sectional drawing of the reclining apparatus in the middle of making it into an unlocked state. It is front sectional drawing of the reclining apparatus in an unlocked state. It is front sectional drawing of the reclining apparatus in the middle of making it into a locked state. It is a partially expanded sectional view of FIG. It is a partial expanded sectional view of the reclining apparatus in a locked state.

  The embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat 14 includes a seat cushion 15 and a seat back 16. A reclining device 1 is provided between the frame 15a of the seat cushion 15 and the frame 16a of the seat back 16 so as to be able to rotate them. The reclining device 1 locks the seat back 16 with the angle adjusted with respect to the seat cushion 15.

  As shown in FIG. 2, the reclining device 1 includes a tooth member (ratchet) 2, a guide member 3, a rotating member (cam member) 4 assembled to the guide member 3, slide members 7 to 9, and an urging member 10. have. The tooth member 2 has a disk shape and has an annular rib 2a on the outer edge. The rib 2a has teeth (inner teeth) 2b on the inner peripheral surface which is an arc portion. A plurality of convex portions 2 c are formed on one side surface of the tooth member 2. The convex portion 2c is fitted into one of the frames 15a and 16a, whereby the tooth member 2 is attached to one of the frames 15a and 16a.

The guide portions 3b and 3c are provided so as to support the slide members 7 and 8 installed therebetween so as to be movable in the radial direction, as shown in FIG. The guide portions 3d and 3e support the slide member 9 installed therebetween so as to be movable in the radial direction. A locking portion 3g is formed at an intermediate position between the guide portions 3b and 3e and an intermediate position between the guide portions 3c and 3d. One end of a biasing member 10 that is a coil spring is fixed to the locking portion 3g. Then, the other end portion of the urging member 10 is hooked on the hooking portion 5 d of the rotating member 4. The rotating member 4 is biased by a pair biasing member 10 in the counterclockwise (locking direction).

  The guide portions 3b and 3c are provided so as to support the slide members 7 and 8 installed therebetween so as to be movable in the radial direction, as shown in FIG. The guide portions 3d and 3e support the slide member 9 installed therebetween so as to be movable in the radial direction. A locking portion 3g is formed at an intermediate position between the guide portions 3b and 3e and an intermediate position between the guide portions 3c and 3d. One end of a biasing member 10 that is a coil spring is fixed to the locking portion 3g. Then, the other end portion of the urging member 10 is hooked on the hooking portion 5 d of the rotating member 4. The rotating member 4 is urged clockwise (lock direction) by the pair of urging members 10.

  As shown in FIGS. 2 and 3, a rotation member 4 is rotatably attached to the center of the guide member 3. The rotating member 4 includes a cam member 5 and a cam plate 6. The cam member 5 has a locking hole 5a at the center, and an operation member (not shown) is fitted into the locking hole 5a. On the outer peripheral surface of the cam member 5, a pair of bulging portions 5b and 5e that bulge in the radial direction are formed. A plurality of convex portions 5c are formed on one side surface of the cam member 5, and the cam plate 6 is assembled to the convex portions 5c.

  The cam plate 6 is formed of a metal plate as shown in FIGS. 2 and 3, and has a fitting hole 6a and a long groove 6b. The convex portion 5c of the cam member 5 is fitted into the fitting hole 6a, whereby the cam plate 6 is assembled to the cam member 5. The long groove 6b extends in the circumferential direction, and the protrusion 7c of the first slide member 7 is inserted into the long groove 6b.

  As shown in FIGS. 2 and 3, the wall surface of the long groove 6b has a first pressing portion 6b1 on the inner peripheral side and a mesh release portion 6b2 on the outer peripheral side. The first pressing portion 6b1 is inclined in the radial direction, and gradually rotates the first slide member 7 radially outward by rotating counterclockwise. Thereby, the first slide member 7 meshes with the tooth member 2. The mesh release portion 6b2 is also inclined in the radial direction, and gradually rotates the first slide member 7 radially inward by rotating clockwise. As a result, the first slide member 7 is disengaged from the tooth member 2.

  The bulging portion 5b of the cam member 5 has a second pressing portion 5b1 and a tension release portion 5b2, as shown in FIGS. The second pusher 5b1 pushes the second slide member 8 toward the first slide member 7 by rotating counterclockwise. The tension release portion 5b2 rotates clockwise to apply a radially inward force to the release claw 8c of the second slide member 8, and separates the second slide member 8 from the first slide member 7. Let

  As shown in FIGS. 2 and 3, the first slide member 7 has teeth (external teeth) 7 a on the outer surface. A second slide member 8 is disposed on the radially inner side of the first slide member 7. The second slide member 8 has a force receiving portion 8a and a release claw 8c on the inner surface. The force receiving portion 8a is pushed radially outward by the second push portion 5b1 when the cam member 5 rotates counterclockwise. As shown in FIG. 4, the release claw 8c is pushed radially inward by the tension release portion 5b2 when the cam member 5 rotates clockwise.

  A force converting mechanism 12 is provided between the first and second slide members 7 and 8 as shown in FIG. The force conversion mechanism 12 has a slope 7 b formed on the inner surface of the first slide member 7 and a curved portion 8 b formed on the outer surface of the second slide member 8. The slope 7b and the curved portion 8b are configured to convert a radial force obtained by pressing the second slide member 8 against the first slide member 7 into a force in the circumferential direction (width direction). Accordingly, the first and second slide members 7 and 8 are pressed against the guide portion 3c and the guide portion 3b, respectively. Thereby, the slide members 7 and 8 are stretched between the pair of guide portions 3b and 3c.

  As shown in FIGS. 2 and 3, the slide member 9 has teeth (external teeth) 9a on the outer surface. A force receiving portion 9 b and a release claw 9 c are formed on the inner surface of the slide member 9. The force receiving portion 9b is pushed by the bulging portion 5e when the cam member 5 rotates counterclockwise. As a result, the slide member 9 moves radially outward and meshes with the tooth member 2. The release claw 9c receives a force inward in the radial direction by the bulging portion 5e when the cam member 5 rotates clockwise. As a result, the sliding member 9 is released from the tooth member 2.

  As shown in FIG. 2, the tooth member 2 and the guide member 3 are assembled by the attachment member 11. The attachment member 11 is annular, and holds the tooth member 2 rotatably with respect to the guide member 3 by caulking the outer peripheral portion toward the guide member 3 side.

  As shown in FIG. 3, in the reclining device 1, the cam member 5 is urged counterclockwise by the urging member 10 in the locked state. The cam member 5 pushes the slide member 9 outward in the radial direction, and the slide member 9 meshes with the tooth member 2. The cam plate 6 is also biased counterclockwise via the cam member 5. The cam plate 6 pushes the slide member 7 outward in the radial direction, and the slide member 7 meshes with the tooth member 2. When the cam member 5 presses the slide member 8 against the slide member 7, the slide members 7 and 8 are stretched between the pair of guide portions 3b and 3c by the force conversion mechanism 12.

  When the reclining device 1 is changed from the locked state shown in FIG. 3 to the unlocked state shown in FIG. 6, first, the cam member 5 is rotated clockwise by an operation member (not shown). 4 and 5, the cam member 5 pushes the slide member 8 inward in the radial direction, and the slide member 8 is separated from the slide member 7. As a result, the stretched state of the slide members 7 and 8 with respect to the pair of guide portions 3b and 3c is released.

  Next, as shown in FIGS. 5 and 6, the disengagement portion 6b2 of the cam plate 6 pushes the protrusion 7c inward in the radial direction. As a result, the slide member 7 is separated from the tooth member 2 and the meshing state with the tooth member 2 is released. As shown in FIGS. 4 to 6, the slide member 9 is also pushed radially inward by the bulging portion 5 e of the cam member 5. Thus, the sliding member 9 is released from the tooth member 2. As a result, the reclining device 1 is unlocked, and the tooth member 2 can rotate with respect to the guide member 3.

  When the reclining device 1 is changed from the unlocked state to the locked state, the force applied to the operation member is first released. As a result, the cam member 5 is rotated counterclockwise by the biasing member 10 as shown in FIG. Then, the first pressing portion 6b1 of the cam plate 6 presses the projection 7c, the first slide member 7 moves radially outward, and the first slide member 7 meshes with the tooth member 2. At this time, the teeth 7a of the slide member 7 mesh with the teeth 2b of the tooth member 2 with a gap in the radial direction. As shown in FIG. 8, the long groove 6b is provided with a rotation allowance gap 6b3 between the protrusion 7c.

  As shown in FIG. 9, when the cam member 5 and the cam plate 6 are further rotated in the locking direction (clockwise), the second pressing portion 5 b 1 presses the second slide member 8. Thereby, the curved portion 8b of the slide member 8 pushes the inclined surface 7b of the slide member 7, and the slide members 7 and 8 are stretched between the pair of guide portions 3b and 3c. And the rotation permissible gap 6b3 in the long groove 6b becomes small, and the teeth 7a of the slide member 7 mesh with the teeth 2b of the tooth member 2 with almost no gap in the radial direction. As a result, the reclining device 1 is locked, and the tooth member 2 is unable to rotate in a state in which the tooth member 2 is prevented from rattling with respect to the guide member 3 side.

The embodiment is formed as described above. That is, as shown in FIGS. 3 and 7, the reclining device 1 includes a first slide structure composed of first and second slide members 7 and 8 that are guided and moved by a pair of guide portions 3 b and 3 c, and a pair. And a rotating member 4 having a second slide structure consisting only of a third slide member 9 that moves while being guided by the guide portions 3d and 3e. The rotating member 4 includes a pressing portion 6b1 that presses the first slide constituent body and meshes the teeth 7a of the first slide member 7 with the teeth 2b of the tooth member 2 when rotating in the locking direction from the unlocked state . A pressing portion is provided for pressing the third slide member 9 to mesh the teeth 9 a of the third slide member 9 with the teeth 2 b of the tooth member 2 . Between the first and second slide members 7, 8, the first and second slide members 7, 8 cooperate with each other in force for pressing the second slide member 8 against the first slide member 7. Thus, a force conversion mechanism 12 is provided for converting the force into a force that stretches between the pair of guide portions 3b and 3c.

  Accordingly, when the reclining device 1 is changed from the unlocked state to the locked state, first, the first slide member 7 is engaged with the tooth member 2. Thereafter, the second slide member 8 pushes the first slide member 7, and the first and second slide members 7, 8 are stretched between the pair of guide portions 3b, 3c. Therefore, the first slide member 7 can be meshed with the tooth member 2 smoothly and reliably. Thereafter, the first and second slide members 7 and 8 are stretched between the pair of guide portions 3b and 3c to lock the seat back 16 against the seat cushion 15 while preventing backlash.

  Further, as shown in FIG. 4, the rotating member 4 moves the second slide member 8 in a direction away from the first slide member 7 when rotating in the unlocking direction from the locked state, so that the pair of guide portions 3 b. , 3c and the first slide member 7 and 8 are released from the tension release portion 5b2, and the first and second slide members 7 and 8 are released from the tension state and the first slide is released. There is a mesh release portion 6b2 that moves the member 7 to release the teeth 7a of the first slide member 7 from the teeth 2b of the tooth member 2.

  Accordingly, when the reclining device 1 is changed from the locked state to the unlocked state, first, the first and second slide members 7 and 8 that are stretched between the pair of guide portions 3b and 3c are released from the stretched state. After that, the first slide member 7 is moved to release the engagement with the tooth member 2. Therefore, the first slide member 7 can be smoothly and reliably released from the tooth member 2.

  Further, the first pressing portion 6b1 and the meshing release portion 6b2 of the rotating member 4 are constituted by the constituent wall surfaces of the long groove 6b into which the protrusion 7c formed on the first slide member 7 is inserted as shown in FIG. ing. Therefore, both the first pressing portion 6b1 and the engagement release portion 6b2 can be formed by a simple wall surface of the long groove 6b.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) For example, in the above embodiment, the rotating member 4 is composed of two members, that is, the cam member 5 and the cam plate 6. However, the rotation member may be formed from a single member.
(2) The above embodiment has two slide members 7 and 9 that mesh with the tooth member 2. However, it has only the slide member 7 side and does not have the slide member 9, or has the slide member 7, the slide member 9, and one or more other slide members formed in the same manner as the slide member 9. It may be in the form.
(3) The tooth member 2 of the above embodiment has an annular rib 2a, and has teeth 2b on the inner peripheral surface of the rib 2a. However tooth member sector of the body has the same fan-shaped body as described for example in FIG. 1 of JP fairness 5-60924, there in the form as it has teeth in an arc surface which is the outer peripheral surface of the main body May be.
(4) In the above embodiment, the long groove 6b is provided on the cam plate 6 (rotating member 4) side, and the protrusion 7c is provided on the slide member 7 side. However, it may have a configuration in which a long groove is provided on the slide member 7 side and a protrusion is provided on the cam plate 6 (rotating member 4) side. According to this embodiment, both the first pressing portion and the mesh release portion can be formed by the protrusion.
(5) In the above embodiment, the first pressing portion 6b1 and the mesh release portion 6b2 are configured by a part of the constituent wall surface of the long groove 6b. However, the first pressing portion and the mesh release portion may be formed separately on the cam plate (rotating member).
(6) The long groove 6b of the above embodiment is a through hole that penetrates the cam plate 6 in the thickness direction. However, the long groove may be recessed in the cam plate.

DESCRIPTION OF SYMBOLS 1 ... Reclining apparatus 2 ... Tooth member 3 ... Guide member 3b-3e ... Guide part 4 ... Turning member 5 ... Cam member 5b, 5e ... Swelling part 5b1 ... Second pushing part 5b2 ... Stretch release part 6 ... Cam plate 6b ... long groove 6b1 ... first pressing part 6b2 ... meshing release part 7 ... first slide member 7c ... projecting part 8 ... second slide member 9 ... slide member 10 ... biasing member 12 ... force converting mechanism 14 ... for vehicle Seat 15 ... Seat cushion 16 ... Seat back

Claims (2)

A reclining device for a vehicle seat that locks the seat back in a state of adjusting the angle with respect to the seat cushion,
A tooth member provided on any one member side of the seat back and the seat cushion and having teeth on an arc portion; a guide member provided on the other member side and having a plurality of guide portions; and the guide portion A first slide structure composed of first and second slide members which are guided and moved by the first pair of guide portions, and the second pair of guide portions of the guide portions. A second slide structure consisting only of a third slide member that is moved and a rotating member that is rotatably provided on the guide member,
Each of the first and third slide members has teeth that mesh with the teeth of the tooth members,
The rotating member includes a first pressing portion that presses the first slide component when the rotating member rotates in the locking direction from the unlocked state and meshes the teeth of the first slide member with the teeth of the tooth member. has a second pressing portion that meshing the teeth of the press the third slide member third slide member to the teeth of the tooth member,
Between the first and second slide members, the first and second slide members cooperate with each other in force to press the second slide member against the first slide member. A force conversion mechanism that converts the force to be stretched between the pair of guide portions is provided ,
When the rotating member rotates in the locking direction from the unlocked state, the first and second slide members are moved by the force conversion mechanism after the first and third slide members are engaged with the tooth member. It is a structure that cooperates and stretches between the first pair of guide portions,
The rotating member moves the second slide member in a direction away from the first slide member when it rotates in the unlocking direction from the locked state, and stretches between the pair of guide portions. A tension release portion for releasing the tension state of the second slide member; and a tooth of the first slide member by moving the first slide member after releasing the tension state of the first and second slide members A mesh release portion for releasing the mesh from the teeth of the tooth member, and after releasing the tension state of the first and second slide members, the third slide member is moved to move the third slide member. A reclining device for a vehicle seat, comprising a portion for disengaging a tooth from a tooth of the tooth member . The vehicle seat reclining device according to claim 1 ,
The first pressing portion and the mesh release portion of the rotating member enter into a long wall surface of the long groove into which the protrusion formed on the first slide member is inserted, or into the long groove formed on the first slide member. A reclining device for a vehicle seat, characterized by comprising a protrusion.

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