JP4720659B2 - Connecting device - Google Patents

Description

  The present invention relates to a connecting device. More specifically, the present invention relates to a connecting device that is positioned between two rotating members that are disposed so as to be rotatable relative to each other and connects them.

2. Description of the Related Art Conventionally, some seats for vehicle seats are provided with a reclining device that can adjust the backrest angle of the seat back. For example, the following Patent Document 1 discloses a reclining device that can adjust the inclination angle of the seat back with respect to the seat cushion. In this disclosure, a pair of reclining devices are disposed on both sides in the width direction of the seat, and the inclination angle of the seat back can be adjusted steplessly with the synchronized movement of each reclining device. .
More specifically, the reclining device can rotate a gate-type back frame that forms the skeleton of the seat back and a frame-shaped cushion frame that forms the skeleton of the seat cushion, respectively, on both sides in the width direction. It is connected. In these reclining devices, a disk-shaped inner tooth member and an outer tooth member are assembled such that the disk surfaces overlap each other. Here, the internal gear is formed with an internal gear that protrudes in a cylindrical shape from the disk surface facing the external gear. On the other hand, the external gear is formed with an external gear that protrudes from a disk surface facing the internal gear so as to be able to mesh with the internal gear of the internal gear. The external gear member is configured to revolve along the inner peripheral shape of the internal gear by engaging the external gear with the internal gear of the internal gear member. The external gear is formed with a smaller diameter than the internal gear, and has a smaller number of teeth than the internal gear. Therefore, by revolving the external gear inside the internal gear, the seat back can be tilted relative to the seat cushion due to the difference in the number of teeth.
By the way, the above-mentioned revolving motion of the external gear is performed in accordance with the rotation of the shaft pin inserted through the both members in the thickness direction. The shaft pin is inserted through the central shaft of the internal gear, and the external gear meshing with the internal gear is inserted at a position eccentric from the central shaft. Here, the internal tooth member is formed with an insertion hole through which the shaft pin can be inserted, and a cylindrical portion protruding from the disk surface along the peripheral shape of the insertion hole is formed. . In addition, a through hole is formed in the outer tooth member so as to surround a cylindrical portion formed in the inner tooth member. This through hole is formed around the central axis of the external gear, and has an eccentric relationship with the cylindrical portion (insertion hole) formed in the internal gear member. In the gap formed between the cylindrical portion formed in the internal tooth member and the through hole formed in the external tooth member, a pair of wedge members are disposed to fill the gap between the two. Here, the wedge members are disposed as a pair on both sides so as to surround the periphery of the cylindrical portion. These wedge members are pushed in the turning direction when the shaft pin is pivoted by a pushing member integrally assembled with the shaft pin in the turning direction. As a result, the wedge member revolves the external tooth member while pressing the inner peripheral surface of the through-hole like a rotating cam in accordance with the movement of the wedge member.
Here, each wedge member is urged in a direction in which the wedge members are attracted to each other by a spring member. As a result, each wedge member is inserted into a narrow gap between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the through hole by the above-described biasing before the shaft pin is rotated. The biting state is maintained, and the backlash between the internal tooth member and the external tooth member is reduced. Then, when the shaft pin is rotated in this biting state, one wedge member is pushed in the direction opposite to the biting direction by the pushing member, and the one biting state is released. As the shaft pin continues to rotate, both wedge members are pushed and moved following the rotation of the shaft pin.
JP 2002-119352 A

  However, in the disclosed technique disclosed in Patent Document 1, when the assembled reclining device is transported as a single component, there is a possibility that the wedge member or the pushing member, which is the assembled component, falls off in the axial direction.

  The present invention was devised to solve the above-described problems, and the problem to be solved by the present invention is to prevent the assembled parts from falling off in the assembled state of the connecting device such as the reclining device. There is to do.

In order to solve the above problems, the connecting device of the present invention takes the following means.
First, the first invention is a connecting device that is positioned between two rotating members that are disposed so as to be relatively rotatable with respect to each other and that connects them. A disk-shaped internal tooth member connected to one of the two rotating members, and a disk-shaped external tooth member assembled in such a manner that the inner tooth member and the disk surface overlap each other and connected to the other of the two rotating members And a holding member that holds the outer tooth member and the inner tooth member in the axial length direction and holds the separated movement in the axial length direction. The internal gear member is formed with an internal gear that protrudes in a cylindrical shape from the disk surface facing the external gear member and has internal teeth on the inner peripheral surface thereof. The external tooth member is formed with an external gear that protrudes in a cylindrical shape from a disk surface facing the internal tooth member and has external teeth on the outer peripheral surface thereof. The external gear has a smaller diameter than the internal gear and has a different number of teeth. The external gear is relatively revolved along the inner peripheral surface in a state in which the external gear is engaged with the internal gear, whereby both gears are The two rotating members can be relatively rotated by the difference in the number of teeth. The relative revolving motion of the external gear is performed with the rotation of the shaft pin inserted through the inner tooth member and the outer tooth member in the plate thickness direction. The shaft pin is inserted through an insertion hole formed around the center axis of the internal gear of the internal gear member. The internal tooth member is formed with a cylindrical portion protruding in a cylindrical shape from the disk surface along the peripheral shape of the insertion hole. A through hole is formed in the outer tooth member so as to surround the outer peripheral edge of the cylindrical portion formed in the inner tooth member. The through hole is formed around the central axis of the external gear, and has a disposition relationship eccentric to the cylindrical portion formed on the internal gear member. In the gap formed between the inner peripheral surface of the through-hole formed in the outer tooth member and the outer peripheral surface of the cylindrical portion formed in the inner tooth member, a pair of wedge members are used as members to fill a part of the gap. It is arranged. The pair of wedge members are opposed to each other so as to surround the outer peripheral surface of the cylindrical portion, and the outer peripheral surface of the cylindrical portion and the inner periphery of the through hole are urged by the urging force of the urging member provided between the two wedge members. The outer gear is pressed against the inner peripheral surface of the internal gear while being held in a state of being sandwiched between the narrowing gaps with the surface. The pair of wedge members is formed by pressing one wedge member in a direction opposite to the biting direction when the shaft pin is pivoted by the push member integrally assembled in the pivot direction with the shaft pin. The biting state of the member is released, and the other wedge member is also pushed and moved following this rotation to relatively revolve the external tooth member while pressing the inner peripheral surface of the through hole formed in the external tooth member. It is like that. The pusher member has a space between the insertion surface of the internal tooth member and the external tooth member that are interposed between the opposing disk surfaces and the movement in the axial length direction is restricted, and the disk surface of the internal tooth member. A holding portion having an arrangement shape capable of restricting the movement of the pair of wedge members in the axial length direction with the pair of wedge members sandwiched therebetween is integrally formed at different arrangement positions in the circumferential direction. ing.
According to the first aspect of the present invention, the pair of wedge members are sandwiched between the narrowing gap between the through hole and the cylindrical portion by the urging force of the urging member at all times before the shaft pin is rotated. It is kept in a state of being bitten. Therefore, the external gear is pressed against the inner peripheral surface of the internal gear by this biting force, and is held in a state in which the backlash between the two is reduced. The biting state of the wedge member is released when one wedge member is pushed in a direction opposite to the biting direction by the pushing member that rotates integrally with the shaft pin. These wedge members are restricted from moving in the axial direction as being sandwiched between the internal teeth member and the disk surface by the holding portion formed on the pushing member. The pushing member is restricted from moving in the axial length direction by inserting an insertion portion between the opposing disk surfaces of the inner tooth member and the outer tooth member.

Further, according to a second aspect of the present invention, in the first aspect described above, the insertion site formed on the push member is disposed at a position between both ends of the pair of wedge members that bite. . The wedge contact structure of the wedge member by the push member is such that the insertion part arranged at a position between the pair of wedge members is sandwiched between the wedge members as the push member rotates in the pushing direction. It is configured to abut against the biting end and push the end in the direction opposite to the biting direction.
According to the second aspect of the invention, when the pushing member is rotated in the pushing direction, the insertion part comes into contact with the end portion of the wedge member that has been bitten, and this end portion is defined as the biting direction. Push in the opposite direction.

Furthermore, a third invention is a frame member according to the first or second invention described above, wherein one rotating member connected to the internal gear member forms one skeleton of a seat back of a vehicle seat or a seat cushion. And the other rotating member coupled to the external tooth member is a frame member that forms the other skeleton of the seat back of the vehicle seat or the seat cushion, and the seat back with respect to the seat cushion with the relative rotation of the both frame members. It is adopted as a reclining device that can adjust the backrest angle.
According to the third invention, the connecting device of the first or second invention described above is employed as a reclining device for adjusting the backrest angle of the vehicle seat.

The present invention can obtain the following effects by taking the above-described means.
First, according to 1st invention, the movement to the axial length direction of a pushing member or a wedge member can be controlled with the holding | maintenance site | part and insertion site | part formed in the pushing member. Therefore, assembly parts, such as a pushing member and a wedge member, can be prevented from coming off in the assembled state of the coupling device.
Furthermore, according to the second aspect of the invention, the wedge member is pushed at the insertion site formed on the pushing member, whereby the configuration can be rationalized and simplified.
Further, according to the third invention, the backrest angle of the seat back can be adjusted suitably by employing the connecting device of the first or second invention described above as a reclining device for a vehicle seat. .

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings. In the following embodiments, the configuration according to the coupling device of the present invention is employed as a vehicle seat reclining device.

  First, the configuration of the reclining device 4 according to the first embodiment will be described with reference to FIGS. Here, FIG. 1 shows an exploded perspective view of the reclining device 4, and FIG. 2 shows a schematic configuration diagram of the seat 1 on which the reclining device 4 is assembled.

Referring to FIG. 2, the reclining devices 4, 4 of the present embodiment are disposed in a pair on both sides in the width direction of the vehicle seat 1, and connect the seat back 2 and the seat cushion 3. Yes. The pair of reclining devices 4 and 4 can be switched between a state in which the backrest angle of the seat back 2 can be adjusted and a state in which the backrest angle can be maintained.
This switching is performed in accordance with the rotational movement of the shaft pins 60 and 60 inserted into the reclining devices 4 and 4. The shaft pins 60, 60 are connected to an electric motor (not shown) disposed inside the seat 1, and a rotating operation synchronized with the left and right is performed by receiving a driving force from the electric motor. ing. This electric motor can be switched between ON / OFF and normal / reverse rotation by a switching operation of a switch (not shown) disposed at a position such as a side portion of the seat 1, for example.
Here, the reclining devices 4 and 4 are always held in a state in which the inclination angle of the seat back 2 can be held before the rotation of the shaft pins 60 and 60 is performed by the electric motor. . And each reclining device 4 and 4 adjusts the backrest angle of the seat back 2 with the rotational movement of each axial pin 60 and 60, when each axial pin 60 and 60 is rotated by an electric motor. It has come to be.

Next, the configuration of the reclining devices 4 and 4 will be described in detail. Although the reclining devices 4 and 4 are formed symmetrically with each other, the substantial configuration is the same. Therefore, in the following description, the one side reclining device 4 shown in FIG. 2 will be described.
That is, as shown in FIG. 1, the reclining device 4 includes an inner tooth member 10, an outer tooth member 20, a pair of wedge members 30 </ b> A and 30 </ b> B, a spring member 40, a pushing member 50, and a shaft pin 60. And the outer peripheral ring 70 are assembled into one. Each of these members is formed of a metal member. Here, the outer peripheral ring 70 corresponds to the clamping member of the present invention.
Hereinafter, the configuration of each member will be described in detail.

First, the internal tooth member 10 will be described. That is, the internal tooth member 10 is formed in a disk shape as shown in FIG.
The inner tooth member 10 is formed so that the outer peripheral edge of the disk shape protrudes in a cylindrical shape toward the outer tooth member 20 by half punching in the axial length direction. And the internal tooth 11a is formed in the internal peripheral surface of this cylindrical protrusion part. Thereby, the cylindrical protrusion part is formed as the internal gear 11.
An insertion hole 12a through which the shaft pin 60 can be inserted in the axial length direction is formed in the central portion of the internal tooth member 10. The insertion hole 12 a is formed so as to penetrate in the plate thickness direction of the internal gear member 10, and the center thereof is concentric with the center 11 r of the internal gear 11.
And the cylindrical part 12 of the shape which the peripheral part of the penetration hole 12a protruded cylindrically toward the external tooth member 20 by the half punching process to an axial length direction is formed in the internal tooth member 10. As shown in FIG.
Here, FIG. 3 shows an attachment structure of the reclining device 4 to the seat back 2 and the seat cushion 3. As shown in the figure, dowels 13a and D dowels 13b are formed on the outer disk surface of the inner tooth member 10 in a circumferential direction at positions spaced radially outward from the insertion hole 12a. Yes. These dowels 13a and D dowels 13b are formed so as to project in the axial length direction from the outer disk surface by half punching in the axial length direction of the internal tooth member 10. These dowels 13a and D dowels 13b are fitted into corresponding dowel holes 2a and D dowel holes 2b formed in the back frame 2f constituting the skeleton of the seat back 2, respectively. The back frame 2f is also formed with an insertion hole 2c through which the shaft pin 60 can be inserted on the same axis as the insertion hole 12a formed in the internal tooth member 10. Here, the D dowel 13b is formed in a shape in which a part of a cylindrical shape is cut out in a D-shaped cross section, and the shape is distinguished from the cylindrical dowel 13a. As a result, the internal gear member 10 is always fitted in the back frame 2f in a predetermined orientation and can be integrally joined. In joining the inner tooth member 10 and the back frame 2f, the dowels 13a and D dowels 13b are fitted in a state where the outer disk surface of the inner tooth member 10 and the plate surface of the back frame 2f are in surface contact. The part is arc welded. The joined state between the internal gear member 10 and the back frame 2f is shown in detail in FIG. Here, the back frame 2f corresponds to one of the two rotating members of the present invention.
The inner tooth member 10 is formed with an annular insertion groove 14 that is recessed along the periphery of the cylindrical portion 12 in a direction opposite to the protruding direction of the cylindrical portion 12. The insertion groove 14 is formed by half punching in the axial length direction of the internal tooth member 10 and can insert an insertion portion 53 of the pushing member 50 described later.

Next, the external tooth member 20 will be described. That is, returning to FIG. 1, the external tooth member 20 is formed in a disk shape.
The outer tooth member 20 is formed such that a central portion of the outer peripheral edge of the disk shape protrudes in a cylindrical shape toward the inner tooth member 10 by half punching in the axial length direction. And the outer tooth | gear 21a is formed in the outer peripheral surface of this cylindrical protrusion part. Thereby, the cylindrical protrusion part is formed as the external gear 21.
A through hole 22 that penetrates in the thickness direction is formed at the center of the external tooth member 20. The inner diameter dimension of the through hole 22 is larger than the outer diameter dimension of the cylindrical portion 12 formed in the inner tooth member 10. The through-hole 22 is arranged in a state of surrounding the outer peripheral edge of the cylindrical portion 12 in a state where the outer tooth member 20 is assembled so that the disk surfaces of the inner tooth member 10 and each other overlap each other. The center of the through-hole 22 is concentric with the center 21r of the external gear 21, and is in an arrangement relationship that is eccentric to the cylindrical portion 12 described above.
Here, as shown in the figure, dowels 23a and D dowels 23b are formed in the circumferential direction on the outer peripheral edge of the outer disk surface of the external tooth member 20. The dowels 23a and D dowels 23b have substantially the same configuration as the dowels 13a and D dowels 13a described in the internal tooth member 10. Therefore, detailed description thereof will be omitted. As shown in FIG. 3, the dowels 23 a and D dowels 23 b are respectively fitted into corresponding dowel holes 3 a and D dowel holes 3 b formed in the cushion frame 3 f forming the skeleton of the seat cushion 3. . The cushion frame 3f is also formed with an insertion hole 3c through which the shaft pin 60 can be inserted on the same axis as the insertion hole 12a formed in the internal tooth member 10. Thereby, the external tooth member 20 is fitted and integrally joined to the cushion frame 3f. The joined state between the external tooth member 20 and the cushion frame 3f is shown in detail in FIG. Here, the cushion frame 3f corresponds to the other of the two rotating members in the present invention.

Here, FIG. 5 shows the internal structure of the reclining device 4 in the assembled state. As shown in the figure, the external gear 21 has a smaller diameter than the internal gear 11 and is formed with a smaller number of teeth. Specifically, the number of teeth of the external teeth 21a formed on the external gear 21 is 33, and the number of teeth of the internal teeth 11a formed on the internal gear 11 is 34.
Accordingly, the external tooth member 20 revolves relatively along the inner peripheral surface in a state where the external gear 21 is engaged with the internal gear 11, so that the internal tooth is regenerated every time due to the difference in the number of teeth. The positional relationship in the rotation direction with respect to the member 10 is shifted. Specifically, the positional relationship described above is shifted in the same direction as the rotational direction of the external gear 21. That is, in FIG. 5, for example, the external gear 21 is relatively moved (relatively revolved) in the clockwise direction along the inner peripheral surface while being rotated counterclockwise along the inner peripheral surface of the internal gear 11. Thus, the outer tooth member 20 can be rotated relative to the inner tooth member 10 in the counterclockwise direction. Actually, the external tooth member 20 is attached to the cushion frame 3f, and the internal tooth member 10 is attached to the back frame 2f. It will be rotated in the direction of rotation.

Next, the pair of wedge members 30A and 30B will be described. That is, returning to FIG. 1, the pair of wedge members 30 </ b> A and 30 </ b> B are formed as frame-shaped members that are curved in an arc shape, and are formed in symmetrical shapes. These wedge members 30 </ b> A and 30 </ b> B are disposed in a gap formed between the inner peripheral surface of the through hole 22 formed in the external tooth member 20 and the outer peripheral surface of the cylindrical portion 12 formed in the internal tooth member 10. Is done. Therefore, a part of the gap is filled by the arrangement of the wedge members 30A and 30B. As shown in FIG. 5, the wedge members 30 </ b> A and 30 </ b> B are disposed so as to face the positions on both the left and right sides so as to surround the outer peripheral surface of the cylindrical portion 12.
Here, returning to FIG. 1, each wedge member 30 </ b> A, 30 </ b> B is formed in a tapered shape in which the radial thickness gradually decreases from the upper part to the lower part in the drawing.

Next, the spring member 40 will be described. That is, returning to FIG. 1, the spring member 40 is formed in a curved shape like an end ring, and the hanging portions 41A and 41B formed at both ends thereof are hooked on the upper end portions of the wedge members 30A and 30B. It has come to be. As shown in FIG. 5, the spring member 40 has a ring shape larger than the diameter of the through hole 22 formed in the external tooth member 20. Therefore, in the spring member 40, the hook portions 41 </ b> A and 41 </ b> B extending in the axial length direction at both ends of the ring member are arranged on the disk surface side outside the external tooth member 20, and the wedge members 30 </ b> A and 30 </ b> B are formed. It is hung on the upper end of the.
With reference to FIG. 5, the spring member 40 urges the upper end portions of the wedge members 30 </ b> A and 30 </ b> B in a direction to separate them from each other. Accordingly, the wedge members 30A and 30B are guided by the shape of the gap between the outer peripheral surface of the cylindrical portion 12 and the inner peripheral surface of the through hole 22, and are biased in a direction in which their lower end portions are attracted to each other. Yes. As a result of this urging, each wedge member 30A, 30B eats the tapered lower end portion into a narrow gap between the outer peripheral surface of the cylindrical portion 12 and the inner peripheral surface of the through hole 22. It is held in a state where it is inserted.
In the state where these wedge members 30A and 30B are bitten, the pressing force for pushing the inner peripheral surface of the through hole 22 in the lower side of the paper surface of the through-hole 22 to the lower outer surface of the cylindrical portion 12 in the paper surface. Act. However, on the other hand, since the upper end portions of the wedge members 30A and 30B are interposed between the outer peripheral surface on the upper side in the paper surface of the cylindrical portion 12 and the inner peripheral surface on the upper side in the paper surface of the through hole 22, Pushing inward and downward is suppressed. Therefore, combined with the above action, the wedge members 30 </ b> A and 30 </ b> B are held in a state of being sandwiched in a narrowing gap between the outer peripheral surface of the cylindrical portion 12 and the inner peripheral surface of the through hole 22. As a result, the external gear 21 is pressed against the inner peripheral surface of the internal gear 11, and the backlash between the two is suppressed.

Next, the pushing member 50 will be described. That is, returning to FIG. 1, the pushing member 50 is formed of a plate-like member. The pushing member 50 is formed in a circular hole-shaped fitting hole 51, holding portions 52, 52 extending from the periphery of the fitting hole 51 in the left-right direction in the drawing, and a bent shape from the fitting hole 51 downward in the drawing. It is formed in a shape that is integrated with the insertion part 53 extending in the direction.
A cylindrical operation member 80 attached to the shaft pin 60 is inserted into the fitting hole 51. The operation member 80 has serrations on the inner peripheral surface thereof. When the operation member 80 is inserted into the shaft pin 60, the operation member 80 matches the serration applied to the outer peripheral surface of the shaft pin 60 and is integrated with the rotation direction. Is assembled. A convex key 81 is formed on the outer peripheral surface of the operation member 80. The fitting hole 51 is formed with a concave key groove 51a into which the convex key 81 can be inserted. Therefore, the shaft pin 60 and the pushing member 50 are integrally assembled in the rotational direction by inserting the operation member 80 in the form of inserting the key 81 into the key groove 51a.
Next, the holding portions 52, 52 are formed with the surfaces facing in the axial length direction of the pushing member 50. The holding portions 52 and 52 are formed to have a size that can be accommodated in the through hole 22 formed in the external tooth member 20. And the holding | maintenance site | parts 52 and 52 become the arrangement | positioning shape which pinches | interposes each wedge member 30A, 30B between the disk surfaces inside the internal tooth member 10. FIG. Therefore, as shown in FIG. 5, in the assembled state of the reclining device 4, the movement of the wedge members 30 </ b> A and 30 </ b> B in the axial length direction is regulated by the holding portions 52 and 52.
Next, returning to FIG. 1, the insertion portion 53 has contact surfaces 53A and 53B and an insertion surface 53C. The former contact surfaces 53A and 53B constitute both side surfaces of a plate-like portion that is bent and extended in the axial length direction from the lower portion of the fitting hole 51. The contact surfaces 53A and 53B are disposed at positions sandwiched between the contact surfaces 32A and 32B that are the lower end surfaces of the wedge members 30A and 30B. Therefore, as shown in FIG. 5, the contact surfaces 53A and 53B are in contact with the contact surface 32A of the wedge member 30A or the wedge member in accordance with the rotation of the pushing member 50 in the assembled state of the reclining device 4. It abuts against the abutment surface 32B of 30B and can be moved in the pushing direction. The latter insertion surface 53C is returned to FIG. 1, and the plate-like portion where the contact surfaces 53A and 53B described above are formed is bent from the end in the axial length direction downward in the drawing sheet. The surface is formed in the axial direction. The insertion surface 53 </ b> C is formed in a size that protrudes outward in the radial direction from the through hole 22 formed in the external tooth member 20. As shown in FIG. 4, the insertion surface 53 </ b> C is inserted into the insertion groove 14 formed in the internal tooth member 10 in a state where the reclining device 4 is assembled. The tooth member 20 is interposed between the opposing board surfaces so that its movement in the axial length direction is restricted. Thereby, the pushing member 50 is prevented from coming off from the reclining device 4 in the axial direction. Here, a slight gap is formed between the opposing disk surfaces of the inner tooth member 10 and the outer tooth member 20, and even if the above-described insertion portion 53 is inserted into this gap, This prevents the moving member 50 from rotating.

For example, referring to FIG. 5, when the shaft pin 60 is rotated in the clockwise direction in the drawing, the pushing member 50 having the above-described configuration rotates in the clockwise direction integrally with the shaft pin 60. Thereby, the contact surface 53A formed in the insertion part 53 contacts the contact surface 32A of the protrusion 31A of the wedge member 30A disposed on the left side in the drawing. When the shaft pin 60 is further rotated in the same direction, as shown in FIG. 6, the left wedge member 30A is pressed against the contact surface 53A and pushed in the direction opposite to the biting direction. The Thereby, the biting state of the left wedge member 30A is released. When the pivoting operation of the shaft pin 60 proceeds as it is, the pushing member 50 turns while pushing the left wedge member 30A. Accordingly, the right wedge member 30B moves in the clockwise direction following the movement in which the left wedge member 30A is pushed clockwise around the pushing member 50 by the biasing force of the spring member 40. Go. Then, the rotation of the both wedge members 30A and 30B in the clockwise direction causes the inner peripheral surface of the through hole 22 formed in the outer tooth member 20 to be pushed outward by the rotation cam. It is pushed and moved in order in the clockwise direction. As a result, the external gear member 20 rotates in the counterclockwise direction while the external gear 21 is engaged with the internal gear 11, and rotates in the clockwise direction along the inner peripheral surface of the internal gear 11. Revolves around.
The wedge members 30 </ b> A and 30 </ b> B are narrowed again between the outer peripheral surface of the cylindrical portion 12 and the inner peripheral surface of the through-hole 22 by the biasing force of the spring member 40 when the rotation operation of the shaft pin 60 is stopped. It enters the gap and becomes a biting state, and is held in this state.

Next, the outer peripheral ring 70 will be described. That is, returning to FIG. 1, the outer peripheral ring 70 is formed in a cylindrical shape having a step by thinly punching a thin plate-like disk member in the axial length direction. The outer peripheral ring 70 is formed as an inner holding surface 71 whose inner edge surface is brought into contact with the peripheral edge portion of the outer disk surface of the internal tooth member 10.
Here, the assembled state of the outer peripheral ring 70 is shown in FIG. As shown in the figure, the outer peripheral ring 70 is assembled in such a manner that the outer tooth member 20 and the inner tooth member 10 are assembled so that the inner disk surfaces overlap each other. Assemble in the long direction). Specifically, the outer peripheral ring 70 has the inner holding surface 71 in contact with the peripheral edge of the outer disk surface of the inner tooth member 10, and the outer edge side surface thereof is radially inward by caulking. It is bent. Thereby, the above-described bent part surface is formed as an outer holding surface 72 that is brought into contact with the peripheral edge portion of the outer disk surface of the external tooth member 20.
The outer holding surface 72 has an area that is brought into contact with the peripheral edge by the relative revolution position of the outer tooth member 20 in relation to the outer tooth member 20 having a smaller diameter than the inner tooth member 10. Change.

Subsequently, a method of using the present embodiment will be described.
Here, referring to FIG. 5, in the reclining device 4, the wedge members 30 </ b> A and 30 </ b> B are always connected to the outer peripheral surface of the cylindrical portion 12 and the inner periphery of the through hole 22 before the rotation operation of the shaft pin 60 is performed. It is held in a state of being caught in a narrow gap between the surfaces. In this state, the external gear 21 is pressed against the inner peripheral surface of the internal gear 11. That is, as shown in FIG. 2, the backrest angle of the seat back 2 with respect to the seat cushion 3 is maintained. Note that, in the initial state, the seat back 2 is held in an upright position with respect to the seat cushion 3, as indicated by a solid line in FIG.
Therefore, in order to adjust the backrest angle of the seat back 2, the shaft pin 60 is rotated by operating a switch (not shown). For example, returning to FIG. 5, when the shaft pin 60 is rotated in the clockwise direction in the drawing, the wedge member 30 </ b> A disposed on the left side in the drawing is pushed by the pushing member 50, and the biting state is changed. Canceled. Thereby, along with the turning operation of the shaft pin 60, the external tooth member 20 rotates in the clockwise direction along the inner peripheral surface of the internal gear 11 of the internal tooth member 10 while rotating in the counterclockwise direction. Revolves relatively in the direction. With this relative revolution, the external tooth member 20 rotates in the counterclockwise direction relative to the internal tooth member 10. However, actually, since the external tooth member 20 is attached to the cushion frame 3f and the internal tooth member 10 is attached to the back frame 2f, the internal tooth member 10 is relatively clockwise with respect to the external tooth member 20. It will be rotated in the direction of rotation. As a result, as indicated by the phantom line in FIG. 2, the seat back 2 is tilted backward from the standing posture position indicated by the solid line in FIG.
Note that the seat back 2 is tilted forward by operating the shaft pin 60 in the direction of rotation opposite to the above. Since such an operation is obvious from the configuration described so far, detailed description thereof is omitted.

  As described above, according to the reclining device 4 of the present embodiment, the holding members 52 and 52 and the insertion member 53 formed in the pushing member 50 move in the axial direction of the pushing member 50 and the wedge members 30A and 30B. Can be restricted. Therefore, in the assembled state of the reclining device 4, it is possible to prevent assembly parts such as the pushing member 50 and the wedge members 30 </ b> A and 30 </ b> B from falling off. Further, the wedge members 30A and 30B are pushed by the insertion part 53 formed on the pushing member 50, thereby rationalizing and simplifying the structure for pushing the wedge members 30A and 30B. Can do. Furthermore, by employing the connecting device of the present invention as the reclining device 4 for the vehicle seat 1, the backrest angle of the seat back 2 can be suitably adjusted.

As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example.
For example, although the example which employ | adopted the connection apparatus of this invention as a reclining apparatus was shown in the said Example, it can also be employ | adopted for another connection apparatus. That is, as long as it is a connecting device that is positioned between two rotating members that are disposed so as to be rotatable relative to each other and connects them, it can be adopted in other configurations.
Further, although the spring member is shown as the urging member, other urging members such as a rubber member can be applied.
Moreover, although the structure which presses the lower end surface of a wedge member with the insertion part formed in the pushing member was shown, you may make it press with another site | part. In this case, for example, it is necessary to form an engagement portion with the pushing member by forming a protruding portion protruding in the axial length direction on the wedge member, so that such a configuration may be complicated. .
Further, the external gear may be formed with more teeth than the internal gear. In this case, with the relative revolution of the external gear, the external tooth member rotates relative to the internal tooth member in the direction opposite to the direction shown in the above embodiment.

1 is an exploded perspective view of a reclining device according to Embodiment 1. FIG. It is a schematic block diagram of a sheet. It is a perspective view showing the attachment structure to the seat of a reclining device. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. FIG. 6 is a configuration diagram illustrating a state where the wedged state of the wedge member is released from the state of FIG. 5.

Explanation of symbols

1 seat 2 seat back 2f back frame (one of two rotating members)
2a Dowel hole 2b D Dowel hole 2c Insertion hole 3 Seat cushion 3f Cushion frame (the other of the two rotating members)
3a Dowel hole 3b D Dowel hole 3c Insertion hole 4 Reclining device (connecting device)
DESCRIPTION OF SYMBOLS 10 Internal tooth member 11 Internal gear 11a Internal tooth 11r Center 12 Cylindrical part 12a Insertion hole 13a Dowel 13b D Dowel 14 Insertion groove 20 External tooth 21 External gear 21a External tooth 21r Center 22 Through-hole 23a Dowel 23b D Dowel 30A, 30B Wedge member 32A, 32B Abutting surface 40 Spring member 41A, 41B Hooking part 50 Pushing member 51 Fitting hole 51a Key groove 52 Holding part 53 Inserting part 53A, 53B Abutting face 53C Inserting surface 60 Axial pin 70 Outer ring (Clamping member)
71 Inner holding surface 72 Outer holding surface 80 Operation member 81 Key

Claims (3)

A connecting device that is located between two rotating members arranged to be rotatable relative to each other and connects them,
A disk-shaped internal tooth member connected to one of the two rotating members;
A disc-shaped external tooth member that is assembled in such a manner that the inner tooth member and the disk surface of each other are superposed and connected to the other of the two rotating members;
A holding member that holds the outer tooth member and the inner tooth member in the axial length direction and holds the separated movement in the axial length direction;
The internal gear member is formed with an internal gear that protrudes in a cylindrical shape from a disk surface facing the external tooth member and has internal teeth on the inner peripheral surface thereof,
The external tooth member is formed with an external gear that protrudes in a cylindrical shape from the disk surface facing the internal tooth member and has external teeth on the outer peripheral surface thereof,
The external gear has a smaller diameter than the internal gear and has a different number of teeth, and relatively revolves along the inner peripheral surface of the external gear engaged with the internal gear. The two rotating members can be relatively rotated by the difference in the number of teeth of both gears,
The relative revolving motion of the external gear is performed in accordance with the rotation of the shaft pin inserted through the internal gear member and the external gear member in the plate thickness direction. It is inserted through an insertion hole formed around the central axis of the internal gear, and the internal tooth member is formed with a cylindrical portion that protrudes cylindrically from the disk surface along the peripheral shape of the insertion hole. The outer tooth member is formed with a through hole so as to surround the outer peripheral edge of the cylindrical portion formed in the inner tooth member, and the through hole is formed around the central axis of the external gear. And the cylindrical portion formed on the internal tooth member is in an eccentric relationship with each other,
A gap formed between the inner peripheral surface of the through-hole formed in the outer tooth member and the outer peripheral surface of the cylindrical portion formed in the inner tooth member has a pair of members as a part of the gap. A wedge member is disposed, and the pair of wedge members are arranged opposite to each other so as to surround the outer peripheral surface of the cylindrical portion, and are mutually moved by a biasing force of a biasing member provided between the wedge members. The outer gear is pressed against the inner peripheral surface of the internal gear, being held in a state of being sandwiched in a narrowing gap between the outer peripheral surface of the cylindrical portion and the inner peripheral surface of the through hole. It is in a state
When the pair of wedge members is pushed in the direction opposite to the biting direction by the pushing member integrally assembled with the shaft pin in the turning direction, the one wedge member is pushed in the direction opposite to the biting direction. The biting state of the one wedge member is released, and the other wedge member is pushed and moved in accordance with this rotation to press the outer peripheral member while pressing the inner peripheral surface of the through hole formed in the external tooth member. Relatively revolved,
The pusher member includes an insertion part that is interposed between the opposing disk surfaces of the internal tooth member and the external tooth member and is restricted from moving in the axial direction thereof, and the disk surface of the internal tooth member The holding portion having an arrangement shape capable of restricting the movement of the pair of wedge members in the axial length direction with the pair of wedge members being sandwiched between A coupling device characterized by being integrally formed. The connecting device according to claim 1,
The insertion portion formed on the pushing member is disposed at a position between both end portions that bite into the pair of wedge members,
The pushing contact structure of the wedge member by the pushing member has a structure in which the insertion portion arranged at a position between the pair of wedge members rotates the wedge member as the pushing member rotates in the pushing direction. A connecting device characterized by having a structure that abuts against an end portion that is bitten in a pinched manner and pushes the end portion in a direction opposite to the biting direction. The coupling device according to claim 1 or 2,
One rotating member connected to the inner tooth member is a frame member that forms one skeleton of a seat back of a vehicle seat or a seat cushion, and the other rotating member connected to the outer tooth member is a vehicle member. A frame member that forms the other skeleton of the seat back of the seat or the seat cushion, and is employed as a reclining device that can adjust the backrest angle of the seat back with respect to the seat cushion in accordance with the relative rotation of both frame members. A coupling device characterized by that.

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