JP5109538B2 - Vehicle seat rotation device - Google Patents

Description

  The present invention relates to a vehicle seat rotation device. For example, the present invention relates to a vehicle seat pivoting device having a spiral spring that pivotally biases a seat back that is pivotally connected to a seat cushion.

The vehicle seat rotation device has, for example, a spiral spring that biases the seat back forward (see Patent Documents 1 and 2). The spiral spring disclosed in Patent Document 1 has an inner peripheral end locked on the seat cushion side and an outer peripheral end locked on the seat back side. The spiral spring is elastically deformed to the entrainment side by rotating the seat back rearward with respect to the seat cushion, and the seat back is biased forward by the elastic force. In order to avoid contact between the inner peripheral surface and the outer peripheral surface when the spiral spring is elastically deformed to the entrainment side, a radial interval is narrow at one region side in the circumferential direction in a free state. . As a result, generation of sliding resistance due to contact between the inner peripheral surface and the outer peripheral surface of the spiral spring is prevented. Further, it is possible to prevent the necessary rotational torque from moving backward and forward of the seat back due to sliding resistance.
JP 2005-31480 A JP 2004-305549 A

  However, this spiral spring has a problem that it is not easy to design and manufacture because the radial winding interval needs to be narrowed on one side of the circumference in a free state. Accordingly, the present invention provides a vehicle that has a spiral spring with substantially equal intervals in the radial direction in a free state, and can avoid contact between the inner peripheral surface and the outer peripheral surface when the spiral spring is elastically deformed to the winding side. It is an object of the present invention to provide an apparatus for rotating a sheet.

  In order to solve the above-mentioned problems, the present invention is a vehicle seat rotating device having the configuration described in each claim. That is, according to the invention described in claim 1, the spiral spring is wound in a spiral shape, and the radial winding interval in the free state is substantially equal, and either the inner peripheral end portion or the outer peripheral end portion is provided. One end is connected to the first member side, and the other end is connected to the second member side. At least one member of the first member and the second member is a pressing member that keeps the spiral spring winding interval substantially equal by pressing a part of the spiral spring when the spiral spring is elastically deformed in the winding direction. Is provided.

  Accordingly, the spiral spring has a configuration that is easy to design and manufacture because the winding interval is substantially equal in the free state. Further, when the spiral spring is elastically deformed to the winding side, the spiral spring is pressed by the pressing member and the winding interval is held at substantially equal intervals. Therefore, it can avoid that the inner peripheral surface and outer peripheral surface of a spiral spring contact, and it can avoid that the operation torque at the time of rotation of a 1st member and a 2nd member becomes large by this.

Moreover, according to the invention described in claim 1, the spiral spring has a diameter circumferential area to be deformed in a direction spacing around the radial direction when being elastically deformed in the direction winding becomes wider. And a press member is the structure which is provided in the radial direction outer side of the outermost peripheral surface of an enlarged diameter surrounding area, and presses an outermost peripheral surface. Therefore, when the spiral spring is elastically deformed in the winding direction, the pressing member presses the outermost peripheral surface of the enlarged diameter peripheral region. Accordingly, the spiral spring can be held at substantially equal intervals in the radial direction by the pressing member.

Moreover, according to the invention described in claim 1, the first member provided on the seat back side, the second member is provided on the seat cushion side. A reclining mechanism is provided between the first member and the second member to connect the seat back to the seat cushion so that the angle can be adjusted. The reclining mechanism has an internal tooth member having internal teeth on the inner circumferential surface of the arc and an external tooth member having external teeth meshing with the internal teeth of the internal tooth member, and the internal tooth member is composed of the first member and the second member. It is provided on one of the member sides, and the external tooth member is provided so as to be movable on the other member side. The pressing member is configured to push the spiral spring so as to relieve the displacement force generated between the first member and the second member by the spiral spring when the spiral spring is elastically deformed in the winding direction. .

  Therefore, the external tooth member can mesh with the internal tooth member stably and reliably. That is, when the outer tooth member is separated from the inner tooth member, the seat back is rotated with respect to the seat cushion, and the spiral spring is elastically deformed in the winding direction, the spiral spring is displaced between the first member and the second member. Generate the power of. However, the force is alleviated by the pressing member pressing the spiral spring. Therefore, the displacement of the first member and the second member is prevented by the pressing member. Thereby, the position shift of an external tooth member and an internal tooth member is prevented, and an external tooth member can mesh | engage with an internal tooth member stably and reliably. Thus, the angle of the seat back can be adjusted reliably and stably.

(Embodiment 1)
The first embodiment will be described with reference to FIGS. A seat 10 is a seat used for a vehicle such as a vehicle as shown in FIG. 1, and includes a seat back 11, a seat cushion 12, and a pivoting device 1 that couples these pivotably. . The rotating device 1 includes a first member 2 and a second member 3, a reclining mechanism 5 provided between them, and a spiral spring (spiral spring) 4.

  As shown in FIGS. 1 and 2, the upper part 2 a of the first member 2 is attached to the lower end of the frame 11 a of the seat back 11. A plurality of mounting holes 2b1 are formed in the lower portion 2b of the first member 2, and a convex portion 5a2 formed on one end surface of the reclining mechanism 5 is inserted into and connected to the mounting hole 2b1. The second member 3 is attached to the rear end portion of the frame 12a of the seat cushion 12 at the lower side portion 3a. The upper part 3b of the second member 3 has a plurality of mounting holes 3b1, and a convex part 5b1 (see FIG. 4) formed on the other side of the reclining mechanism 5 is inserted into and connected to the mounting hole 3b1. .

  As shown in FIG. 1, the reclining mechanism 5 is a mechanism that connects the seat back 11 to the seat cushion 12 so that the angle can be adjusted, and is provided between the first member 2 and the second member 3. As shown in FIGS. 4 and 5, the reclining mechanism 5 includes a guide member 5 b and an internal tooth member (ratchet) 5 a. The guide member 5b has four guide portions 5b4, and external tooth members (slide poles) 5c are installed in the upper and lower regions between the guide portions 5b4. A switching member (slide cam) 5d is installed in the left and right regions between the guide portions 5b4 over the left and right regions. Therefore, the switching member 5d and the external tooth member 5c are supported by the guide portion 5b4 so as not to rotate in the circumferential direction and to be slidable in the radial direction.

  An operation member 5e is attached to the center of the guide member 5b as shown in FIGS. The operation member 5e has a claw 5e1 extending from the outer peripheral edge, and the claw 5e1 is inserted into the fitting portion 5d2 of the switching member 5d. Accordingly, the switching member 5d slides in the radial direction in conjunction with the rotation of the operation member 5e. The operating member 5e has a shaft portion 5e2 that passes through the center hole 5b2 of the guide member 5b. The shaft portion 5e2 is engaged with the inner end portion 5f1 of the spring 5f, and the outer end portion 5f2 of the spring 5f is engaged with the engaging portion 5b3 of the guide member 5b.

  As shown in FIGS. 4 and 5, the internal tooth member 5 a has an annular portion 5 a 3 on the outer peripheral edge. A lock zone in which the inner teeth 5a1 are formed and a free zone in which the inner teeth 5a1 are not formed are set on the inner circumferential surface of the circular arc of the annular portion 5a3. The internal tooth member 5a is rotatably attached to the guide member 5b by the attachment ring 5g.

  In order to change the reclining mechanism 5 from the locked state to the unlocked state, first, the operation member 5e is rotated by an operation lever (not shown). Thereby, the operation member 5e rotates against the spring 5f, and the switching member 5d slides in conjunction with the rotation of the operation member 5e. Then, the return claw 5d1 of the switching member 5d pushes the claw 5e1 of the external tooth member 5c toward the center, and the external teeth 5c1 of the external tooth member 5c are separated from the internal teeth 5a1 of the internal tooth member 5a. As a result, the internal tooth member 5 a can be rotated with respect to the guide member 5 b, and the seat back 11 can be rotated with respect to the seat cushion 12.

  In order to change the reclining mechanism 5 from the unlocked state to the locked state, first, the operating force of the operating lever is released. As a result, the operating member 5e is rotated by the spring 5f, the switching member 5d slides in conjunction with the rotation of the operating member 5e, and the switching member 5d pushes the leg portion 5c3 of the external tooth member 5c radially outward. . As a result, the outer tooth member 5c meshes with the inner tooth member 5a, and the inner tooth member 5a cannot rotate with respect to the guide member 5b. Thus, the seat back 11 cannot rotate with respect to the seat cushion 12.

  As shown in FIGS. 1 and 2, the rotation device 1 has a spiral spring 4. The spiral spring 4 is a member that elastically deforms when the seat back 11 is rotated rearward and urges the seat back 11 to rotate forward by its elastic force. As shown in FIGS. 2 and 3, the spiral spring 4 is formed in a spiral shape and has the same substantially rectangular cross section over its entire length. The winding interval of the spiral spring 4, that is, the radial interval 4f between the inner peripheral surface and the outer peripheral surface of the spiral spring 4, is substantially equal over the entire circumference in the free state.

  The spiral spring 4 has a bent inner peripheral end 4a and outer peripheral end 4b. The inner peripheral end 4 a is locked to the first member 2 via the first locking member 7 as shown in FIGS. The outer peripheral end 4 b is locked to the second member 3 via the second locking member 8. The first locking member 7 has a sector shape, and the arc side portion 7a is attached to the first member 2 by a screw or the like. The fan main portion 7b of the first locking member 7 protrudes toward the center of the spiral spring 4 and has a hole 7b1 in which the inner peripheral end 4a is locked. The second locking member 8 has an attachment portion 8a attached to the second member 3 and a standing portion 8b standing from the attachment portion 8a. The outer peripheral end 4b of the spiral spring 4 is locked to the standing portion 8b.

  As shown in FIGS. 2 and 3, the rotating device 1 has a pressing member 6. The pressing member 6 is a member that prevents the spiral spring 4 from being biased and deformed by pressing the spiral spring 4 when the spiral spring 4 is elastically deformed. The pressing member 6 includes an attachment portion 6a and an overhang portion 6b. ing. The attachment portion 6a is attached to the second member 3 with screws or the like. The overhang portion 6 b is erected from one end of the attachment portion 6 a and extends toward the spiral spring 4. And the front-end | tip part of the overhang | projection part 6b has faced a part of outermost peripheral surface 4c of the spiral spring 4. FIG.

  The spiral spring 4 is assembled between the seat back 11 and the seat cushion 12 while being elastically deformed in the winding direction. Therefore, when the seat back 11 is erected, the spiral spring 4 is already elastically deformed in the winding direction, and when the seat back 11 is rotated backward, the spiral spring 4 is further elastically deformed in the winding direction. As shown in FIG. 6, when the spiral spring 4 is elastically deformed in the winding direction without the pressing member 6, the spiral spring 4 is elastically deformed unevenly. That is, the radial winding interval differs depending on the peripheral region, and in the reduced peripheral region 4e, the radial winding interval of the spiral spring 4 becomes narrow, and the inner peripheral surface and the outer peripheral surface are in contact with or very close to each other. On the other hand, in the enlarged diameter peripheral region 4d located in the region opposite to the reduced diameter peripheral region 4e, the radial winding interval is wider than the free width interval.

  On the other hand, the pressing member 6 is attached to the second member 3 so as to be positioned on the radially outer side of the outermost peripheral surface 4c of the enlarged diameter peripheral region 4d as shown in FIG. Therefore, when the spiral spring 4 is elastically deformed in the winding direction, the pressing member 6 presses the outermost peripheral surface 4c, whereby the winding interval of the spiral spring 4 is maintained at substantially equal intervals. As a result, the pressing member 6 can prevent the inner peripheral surface and outer peripheral surface of the spiral spring 4 from coming into contact with each other.

  The pressing member 6 also has a function of relaxing the force Y (see FIG. 6) generated by the spiral spring 4. The force Y is a force by which the spiral spring 4 pushes the fan main portion 7b of the first locking member 7 when the spiral spring 4 is elastically deformed in the winding direction. This is the force of misalignment that occurs between them. On the other hand, the pressing member 6 presses the spiral spring 4 when the spiral spring 4 is elastically deformed in the winding direction as shown in FIG. As a result, the displacement force Y changes to a force X (see FIG. 3) that is considerably smaller than the force Y. Thus, the force Y is relaxed to the force X by the pressing member 6.

  The first embodiment is formed as described above. That is, the spiral spring 4 has substantially equal intervals in the radial direction in the free state. The second member 3 is provided with a pressing member 6 that keeps the winding interval of the spiral spring 4 substantially equal by pressing a part of the spiral spring 4 when the spiral spring 4 is elastically deformed in the winding direction. Yes.

  Therefore, the spiral spring 4 has a configuration that is easy to design and manufacture because the winding interval is substantially equal in the free state. Further, when the spiral spring 4 is elastically deformed to the winding side, the spiral spring 4 is pressed by the pressing member 6 and the winding interval is held at substantially equal intervals. Therefore, it can avoid that the inner peripheral surface and outer peripheral surface of spiral spring 4 contact, and it can avoid that the operation torque at the time of rotation of the 1st member 2 and the 2nd member 3 becomes large by this. Since the torque required for the spiral spring 4 is reduced, the spiral spring 4 can be downsized.

  Further, the spiral spring 4 has an enlarged diameter peripheral region 4d as shown in FIGS. And the press member 6 is provided in the radial direction outer side of the outermost peripheral surface 4c of the diameter expansion surrounding area | region 4d, and becomes a structure which pushes the outermost peripheral surface 4c. Therefore, when the spiral spring 4 is elastically deformed in the winding direction, the pressing member 6 presses the outermost peripheral surface 4c of the enlarged diameter peripheral region 4d. Thus, the spiral spring 4 can be held at substantially equal intervals in the radial direction by the pressing member 6. In addition, since the pressing member 6 is configured to press only a part of the spiral spring 4, the pressing member 6 has a simple configuration compared to a configuration in which a plurality of pressing members 6 are pressed.

  3 and 4, the reclining mechanism 5 includes an internal tooth member 5a and an external tooth member 5c, the internal tooth member 5a is provided on the first member 2 side, and the external tooth member 5c is the second member. It is provided on the 3 side. The pressing member 6 is configured to relieve the displacement Y (see FIG. 6) generated by the spiral spring 4 between the first member 2 and the second member 3.

  Therefore, the outer tooth member 5c can mesh with the inner tooth member 5a stably and reliably. That is, when the outer tooth member 5c is separated from the inner tooth member 5a, the seat back 11 is rotated with respect to the seat cushion 12, and the spiral spring 4 is elastically deformed in the entrainment direction, the spiral spring 4 becomes the first member 2 and the second member. 3 generates a force Y in the direction of displacement. However, the force Y is alleviated when the pressing member 6 pushes the spiral spring 4. Therefore, the displacement of the first member 2 and the second member 3 is prevented by the pressing member 6. Thereby, the position shift of the external tooth member 5c and the internal tooth member 5a is prevented, and the external tooth member 5c can mesh with the internal tooth member 5a stably and reliably. Thus, the angle of the seat back 11 can be adjusted reliably and stably.

(Embodiment 2)
The second embodiment will be described with reference to FIG. The second embodiment is different from the first embodiment in that a pressing member 15 is provided instead of the pressing member 6 of the first embodiment. As shown in FIG. 7, the pressing member 15 is attached not to the second member 3 but to the first member 2. The pressing member 15 has an attachment portion 15 a that is attached to the first member 2 at a radially outer position of the outermost peripheral surface 4 c of the enlarged diameter peripheral region 4 d of the spiral spring 4. An extension portion 15b is formed at one end portion of the attachment portion 15a, and the extension portion 15b is erected from one end portion of the attachment portion 15a so as to face the outermost peripheral surface 4c of the spiral spring 4. The surface 4c is pressed.

(Embodiment 3)
A third embodiment will be described with reference to FIG. The third embodiment is different from the first embodiment in that a pressing member 16 is provided instead of the pressing member 6 of the first embodiment. As shown in FIG. 8, the pressing member 16 has a mounting portion 16a, a holding portion 16b, and a moving portion 16c. The attachment portion 16 a is attached to the second member 3 at a radially outer position of the outermost peripheral surface 4 c of the spiral spring 4. The holding portion 16b has an internal thread portion 16b1 that is erected on one end edge of the attachment portion 16a and into which the moving portion 16c is screwed.

  The moving part 16c has a bolt head part 16c1, a male screw part 16c2, and a tip part 16c3. The male screw portion 16c2 extends from the bolt head portion 16c1 and is screwed into the female screw portion 16b1 of the holding portion 16b. The distal end portion 16 c 3 is provided at the distal end of the male screw portion 16 c 2 and is in contact with the outermost peripheral surface 4 c of the spiral spring 4. The pressing member 16 is attached to the second member 3 in a state where the protruding amount of the moving portion 16c from the holding portion 16b is small, and then the moving portion 16c is pivoted so that the protruding amount of the moving portion 16c from the holding portion 16b. And the moving portion 16c is brought into contact with the spiral spring 4.

  Therefore, the pressing member 16 can be easily attached to the second member 3. Moreover, the pressing position and pressing of the spiral spring 4 by the pressing member 16 can be adjusted by adjusting the position of the moving part 16c. Therefore, the spiral spring 4 can be appropriately pressed by the pressing member 16.

(Embodiment 4)
The fourth embodiment will be described with reference to FIG. The fourth embodiment is different from the first embodiment in that a pressing member 17 is provided instead of the pressing member 6 of the first embodiment. As shown in FIG. 9, the pressing member 17 has a mounting portion 17a, a holding portion 17b, a roller shaft 17c, and a roller 17d. The attachment portion 17 a is attached to the second member 3 at a radially outer position of the outermost peripheral surface 4 c of the spiral spring 4. The holding portion 17b is erected on one end edge of the attachment portion 17a and extends to the spiral spring 4 side.

  The roller shaft 17c is erected with respect to the holding portion 17b and extends to the first member 2 side, and is attached to the holding portion 17b so that the shaft can rotate. A cylindrical roller 17d is attached to the outer periphery of the roller shaft 17c. The roller 17d abuts on the outermost peripheral surface 4c of the spiral spring 4 so as to be rotatable. Accordingly, when the spiral spring 4 is elastically deformed, the roller 17d pushes the spiral spring 4 while the roller 17d rotates. Therefore, torque loss caused by friction between the spiral spring 4 and the pressing member 17 is reduced.

(Other embodiments)
The present invention is not limited to the first to fourth embodiments, and may be the following forms.
(1) The seat 10 according to the first to fourth embodiments includes a seat back 11 and a seat cushion 12, and the rotating device 1 is provided between them. However, the seat has a seat cushion and an ottoman that is pivotably attached to the front side portion of the seat cushion, and the ottoman supports the occupant's calf from below, and the pivoting device is between the ottoman and the seat cushion. It may be a form provided in
(2) Or the seat has a seat back and a headrest that is pivotably attached to the upper portion of the seat back, and the turning device is provided between the headrest and the seat back. good.
(3) Alternatively, the seat may be rotatably attached to the vehicle body, and the rotation device may be provided between the seat and the vehicle body.
(4) In the spiral spring 4 of Embodiments 1 to 4, the inner peripheral end 4a is connected to the first member 2 side, and the outer peripheral end 4b is connected to the second member 3 side. However, the inner peripheral end portion may be connected to the second member side, and the outer peripheral end portion may be connected to the first member side.
(5) The pressing member 6 of the first to fourth embodiments is configured to press the outermost peripheral surface 4 c of the enlarged diameter peripheral region 4 d of the spiral spring 4. However, the pressing member may be provided at all positions or at least one position of the winding interval in the enlarged diameter peripheral region of the spiral spring to press the spiral spring 4.
(6) The reclining mechanism 5 according to the first to fourth embodiments includes an internal tooth member 5a and an external tooth member 5c, the internal tooth member 5a is provided on the first member 2 side, and the external tooth member 5c is It was provided on the second member 3 side. However, the internal tooth member may be provided on the second member side and the external tooth member may be provided on the first member side.

It is a left view of a vehicle seat. It is a disassembled perspective view of a rotation apparatus. It is a side view of a rotation device. It is a disassembled perspective view of a reclining mechanism. It is sectional drawing of a reclining mechanism. It is a side view of the rotation apparatus when a pressing member is not provided. 6 is a side view of a rotating device according to Embodiment 2. FIG. 6 is a side view of a rotating device according to Embodiment 3. FIG. FIG. 10 is a side view of a rotating device according to a fourth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Turning apparatus 2 ... 1st member 3 ... 2nd member 4 ... Spiral spring 4a ... Inner peripheral edge part 4b ... Outer peripheral edge part 4c ... Outermost peripheral surface 4d ... Expanded peripheral area 4e ... Reduced diameter peripheral area 4f ... Spacing 5 ... Reclining mechanism 5a ... Internal tooth member 5b ... Guide member 5c ... External tooth member 5d ... Switching member 5e ... Operation members 6, 15, 16, 17 ... Pressing member 7 ... First locking member 8 ... Second locking member 10 ... Seat 11 ... Seat back 12 ... Seat cushion

Claims (3)

A first member and a second member that are pivotably connected, and a spiral that elastically deforms by rotating the first member and the second member and applies an urging force in a rotating direction between them by the elastic force. A vehicle seat rotating device that uses a biasing force of the spiral spring to rotate a part or all of the vehicle seat,
The spiral spring is wound in a spiral shape, and the radial winding interval in a free state is substantially equal, and either one of the inner peripheral end and the outer peripheral end is connected to the first member side. The other end is connected to the second member side,
When at least one of the first member and the second member is elastically deformed in the winding direction, the winding interval of the spiral spring is substantially equalized by pressing a part of the spiral spring. A pressing member is provided to keep the interval ,
The spiral spring has an enlarged circumferential region that tends to deform in a direction in which a winding interval is increased in the radial direction when elastically deforming in the winding direction,
The pressing member is provided on the radially outer side of the outermost peripheral surface of the enlarged diameter peripheral region and is configured to press the outermost peripheral surface,
The first member is provided on the seat back side,
The second member is provided on the seat cushion side,
A reclining mechanism is provided between the first member and the second member to connect the seat back to the seat cushion so that the angle can be adjusted.
The reclining mechanism includes an internal tooth member having an internal tooth on an arc inner peripheral surface, and an external tooth member having an external tooth meshing with an internal tooth of the internal tooth member, and the internal tooth member is the first member and Provided on one member side of the second member, the external tooth member is provided movably on the other member side,
When the spiral spring is elastically deformed in the winding direction, the pressing member presses the spiral spring so as to relieve a displacement force generated between the first member and the second member by the spiral spring. It is composed
The vehicle seat rotation device characterized in that the outer peripheral end of the spiral spring is connected to the second member on the seat cushion side, and the pressing member is attached to the second member . The vehicle seat turning device according to claim 1,
The vehicle seat rotation device , wherein the pressing member includes a roller that is rotatably provided with respect to the second member and that rotates while being in contact with the spiral spring during the elastic deformation of the spiral spring . The vehicle seat rotating device according to claim 2 ,
The pressing member is attached to the second member, and extends from the attaching portion beyond the outermost peripheral surface of the spiral spring so as to cover a part of the spiral spring, and the roller is rotatably attached. A vehicle seat rotation device having a holding portion .

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