JPH073388U - Reclining device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a reclining device which has a small operation stroke and which can narrow an opening of a cover which covers the reclining device. A rotation center is provided at an upper portion of a lower arm 31, and has a rotation end portion extending downward, and a tooth portion 34a of a ratchet 34 and a detachable tooth are provided on one side portion on the rotation end side. A portion 36a is formed, and a pole 36 having a convex portion 36b is formed on the other side portion of the rotating end portion, and a pin erected on the other side portion side of the pole 36 near the rotation center of the pole 36. 38 and the lower arm 31 so as to be movable in the vertical direction, and the convex portion 36b of the pole 36 when moved downward.
The first contact portion 39a that can contact the
A release handle 39 having a second contact portion 39b capable of contacting the lower portion of the pin 38, one end of which is locked to the lower arm 31, and the other end of which is locked to the release handle 39,
A spring 41 for urging the release handle 39 downward.
And.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reclining device used for a seat of an automobile or the like.

[0002]

[Prior art]

 An example of a conventional reclining seat will be described with reference to FIG. Reference numeral 1 is a lower arm attached to the seat cushion side, and 2 is an upper arm attached to the seat back side. The upper arm 2 is pivotally attached to the lower arm 1 via a hinge pin 3 so as to be rotatable in the front-rear direction. Reference numeral 4 is a ratchet plate formed in a fan shape, and an arcuate tooth portion 4a having the same center as that of the hinge pin 3 is engraved on the outer peripheral portion thereof, and is riveted to the upper arm 2 by a rivet 5. Reference numeral 6 denotes a pole having a tooth portion that engages with the tooth portion 4a of the ratchet plate 4, and is pivotally attached to the lower arm 1 by a pin 7 so as to be disengageable from the tooth portion 4a. There is.

Reference numeral 8 denotes a release arm for engaging and disengaging the pawl 6, which is rotatably supported by the lower arm 1 by a pin 9. The structure in which the release arm 8 and the pole 6 are connected to each other is always urged counterclockwise in FIG. 3 by the tension spring 10 so that the guide pin 12 protruding from the pole 6 is inserted into the cam hole 8a of the release arm 8. The pole 6 is inserted and rotated in the direction of releasing the engagement with the ratchet plate 4 (lock releasing) as the release arm 8 rotates in the clockwise direction. Numeral 13 is a cam which rotates integrally with the release arm 8, and the back surface of the pole 6 is ratcheted so that the teeth of the pole 6 mesh with the teeth 4a of the ratchet plate 4 in a locked state. It presses against the plate 4 side.

In order to move the cam 13 following the release arm 8, a rectangular hole is bored in the release arm 8, and a convex portion to be fitted into the rectangular hole is formed on the cam 13 so as to project. Reference numeral 14 is a sub-plate for preventing the parts from coming off and reinforcing, and 15 is a spiral spring for urging the upper arm 2 in the counterclockwise direction in FIG. 3, which includes a hook 16 fixed to the upper arm 2 and a hinge pin 3 (for locking). It is hooked between the groove 3e part).

Next, the operation of the above configuration will be described. The tilt angle of the seat back (upper arm 2) in the front-rear direction can be adjusted by disengaging the teeth of the pole 6 from the teeth 4a of the ratchet plate 4. This can be achieved by rotating the release arm 8 in the clockwise direction in FIG. 3 and rotating the pawl 6 in the counterclockwise direction in FIG. 3 by the cooperation of the cam hole 8a and the guide pin 12.

[0006]

[Problems to be solved by the device]

 However, the reclining device configured as described above has a problem that the operation stroke of the release arm 8 is large.

Further, since the operation stroke of the release arm 8 is large, the opening for the release arm 8 of the cover that covers the entire reclining device becomes large, and there is a problem that dust and the like easily enter the cover.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a reclining device that has a small operation stroke and can narrow an opening of a cover that covers the reclining device. is there.

[0009]

[Means for Solving the Problems]

 The present invention which solves the above-mentioned problem is provided with a lower arm fixed to the seat cushion side, an upper arm tiltably provided to the lower arm via a hinge pin, and a tooth portion which rotates integrally with the upper arm. And a rotation center provided at an upper portion of the lower arm and having a rotation end portion extending downward, and one side portion on the rotation end side is provided with a tooth portion of the ratchet. A tooth having a engageable and disengageable tooth is formed, and a pole having a convex portion is formed on the other side of the rotating end, and the pole is erected near the center of rotation of the pole on the other side of the pole. And a first contact portion that is provided so as to be movable in the vertical direction with respect to the lower arm and that can contact the convex portion of the pole when moving downward, and the lower portion of the pin when moving upward. Having a second contact portion capable of contacting with And a spring that has one end locked to the lower arm and the other end locked to the release handle and urges the release handle downward.

[0010]

[Action]

 In the reclining device of the present invention, when the release handle is pulled up against the biasing force of the spring in the locked state, the contact between the first contact portion of the release handle and the convex portion of the pole is released, The teeth of the pole and the teeth of the ratchet plate can be engaged and disengaged. When the release handle is further pulled up, the second contact part of the release handle contacts the lower part of the pin, and the pole is rotated around the pin, and the tooth part of the pole and the tooth part of the ratchet are separated. (Unlocked state).

[0011]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a reclining device according to an embodiment of the present invention in a locked state, and FIG. 2 is a perspective view around a pole and a release handle in FIG. In these figures, 31 is a lower arm attached to the seat cushion side, 32 is an upper arm attached to the seat back side, and the upper arm 32 is pivotally attached to the lower arm 31 via a hinge pin 33 so as to be rotatable in the front-rear direction. .

Reference numeral 34 is a ratchet plate formed in a fan shape, and an arcuate tooth portion 34 a having the same center as that of the hinge pin 33 is carved on the outer peripheral portion thereof, and is riveted to the upper arm 32 by a rivet 35.

Reference numeral 36 is a pole rotatably attached by a pin 37 provided on the lower arm 31. On one side of the rotating end extending below the pawl 36, a tooth 36a that can be engaged with and disengaged from the tooth 34a of the ratchet plate 34 is formed, and on the other side of the rotating end. Has a convex portion 36b.

Reference numeral 38 denotes a pin that is provided on the other side of the pole 36 and is erected near the pin 37 that is the center of rotation of the pole 36. Reference numeral 39 is a release handle which is arranged on the other side of the pole 36 and is provided so as to be movable upward and downward with respect to the lower arm 31. The release handle 39 includes a first contact portion 39a at the lower end, which comes into contact with the convex portion of the pole when it moves downward, and a side portion on the side of the pole 36, and a lower portion of the pin of the pole when it moves upward. And a second abutting portion 39b capable of abutting on the above is formed. A handle 40 is attached to the upper end of the release handle. When the first contact portion 39a of the release handle 39 and the convex portion 36b of the pawl 36 are in contact with each other, the tooth portion 36a of the pole 36 and the tooth portion 34a of the ratchet plate 34 are in the engaged state. It is set to be (locked).

Reference numeral 41 denotes a spring, one end of which is locked to the lower arm 31 and the other end of which is locked to the release handle 39 to urge the release handle 39 downward. Reference numeral 42 is a sub-plate for preventing the ratchet plate 34, the pole 36, and the release handle 39 from coming off and reinforcing them. Reference numeral 43 denotes a spiral spring that biases the upper arm 32 in the counterclockwise direction in FIG. 1 and is hooked between a hook 44 fixed to the upper arm 32 and a hinge pin 33 (locking groove 33e portion).

Next, the operation of the above configuration will be described. The inclination angle of the seat back (upper arm 32) in the front-rear direction can be adjusted by disengaging the tooth portions 36a of the pawl 36 from the tooth portions 34a of the ratchet plate 34. This pulls the handle 40 of the release handle 39 in the locked state upward in FIG. 1 against the urging force of the spring 41. Then, the contact between the first contact portion 39a of the release handle 39 and the convex portion 36b of the pole 36 is released, and the tooth portion 36a of the pole 36 and the tooth portion 34a of the ratchet plate 34 are disengaged from each other. It becomes removable. When the release handle 39 is further pulled up, the second contact portion 39b of the release handle 39 contacts the lower portion of the pin 39b, and the pole 36 is rotated clockwise about the pin 37 in FIG. The tooth portion 36a of the pole 36 and the tooth portion 34a of the ratchet plate 34 are in a disengaged state (unlocked state).

According to the above configuration, the radius of gyration of the pole 36 of this embodiment is shorter than the radius of gyration of the conventional pole. Therefore, from the state where the tooth portion 36a of the pole 36 meshes with the tooth portion 34a of the ratchet plate 34, the tooth portion 36a of the pole 36 is completely disengaged and the upper arm is in a rotatable state. The rotation angle becomes large (for example, about 3 ° in the conventional pole, but about 5 ° in this embodiment). However, since the pin 38, which is the point of action of the force that rotates the pole 36, is provided in the vicinity of the pin 37, which is the center of rotation of the pole 36, the operation stroke of the release handle 39 can be smaller than before. .

Furthermore, since the operation stroke of the release handle 39 is small, the opening for the release handle 39 of the cover that covers the entire reclining device can be made small, and the appearance of the seat can be improved.

[0019]

[Effect of device]

 As described above, according to the present invention, it is possible to realize a reclining device that has a small operation stroke and can narrow the opening of the cover that covers the reclining device.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a reclining device according to an embodiment of the present invention in a locked state.

FIG. 2 is a perspective view around a pole and a release handle in FIG.

FIG. 3 is a configuration diagram of a conventional reclining device in a locked state.

[Explanation of symbols]

 31 Lower Arm 32 Upper Arm 33 Hinge Pin 34 Ratchet Plate 34a Teeth 36 Pole 36a Teeth 36b Convex 38 Pin 39 Release Handle 39a First Abutment 39b Second Abutment 41 Spring

Claims (1)

[Scope of utility model registration request] 1. A lower arm (31) fixed to a seat cushion side, an upper arm (32) tiltably provided to the lower arm via a hinge pin, and an upper arm (32). And a ratchet (34) having teeth formed thereon, and a center of rotation is provided above the lower arm (31),
It has a rotating end extending downward, and a tooth (36a) that can be engaged with and disengaged from the tooth (34a) of the ratchet (34) is formed on one side on the side of the rotating end. A pole (36) having a convex portion (36b) formed on the other side portion of the end portion.
And on the other side of the pole (36), the pole (3
6) A pin (38) provided upright in the vicinity of the rotation center of the pole, and a protrusion (36b) of the pole (36) provided so as to be vertically movable with respect to the lower arm (31). A release contact (3a) having a first contact portion (39a) capable of contacting the first contact portion, and a second contact portion (39b) capable of contacting the lower portion of the pin (38) when moved upward.
9), one end of which is locked to the lower arm (31) and the other end of which is locked to the release handle (39), and a spring (4) for urging the release handle (39) downward.
1) and a reclining device comprising: