JPH0332276Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a reclining device used in vehicles, etc., and more specifically, the present invention relates to a reclining device used in vehicles, etc., and more specifically, a pole rotatably pivoted to the lower arm side and a latch attached to the upper arm side. By releasing the engagement with the release lever, the inclination angle of the upper arm, which is pivotally supported by the lower arm via a rotation shaft, can be coarsely adjusted, and the rotation of the operating handle attached to the lower arm can be roughly adjusted. The present invention relates to a reclining device configured to transmit motion to the upper arm via a chain, the rotating shaft, and a planetary gear mechanism, and finely adjust the inclination angle of the upper arm.

<Prior Art> A conventional reclining device of this type will be explained with reference to FIGS. 1 to 3. Reference numeral 1 designates a lower arm that is fixed to the seat cushion side with screws, etc., and 2 is an upper arm that is similarly fixed to the seat back side. An inner gear 2a is embossed on one side of the upper arm 2 by precision press processing or the like. Reference numeral 3 denotes an intermediate gear plate (latch) disposed adjacent to the upper arm 2, and an outer gear 3a is embossed on the side surface of the upper arm 2 facing the inner gear 2a by precision press processing, and an engagement plate is formed on the outer edge of the intermediate gear plate (latch). Matching teeth 3b are carved. The number of teeth of the inner gear 2a is selected to be at least one more than the number of teeth of the outer gear 3a. Reference numeral 4 denotes a pole rotatably attached to the lower arm 1 with a stepped pin 5, and a locking portion 4a that engages with and disengages from the engagement teeth 3b of the intermediate gear plate 3 is formed. Further, a pin 7 protruding toward the opposite side of the lower arm 1 is implanted near the locking portion 4a, and the pin 7 is connected to the intermediate portion 8a of the release lever 8.
The cam hole 8c is inserted into the cam hole 8c. Reference numeral 9 denotes a sub-plate disposed closer to the lower arm 1 than the release lever 8, and the stepped pin 5 and the stepped pin 1 are connected to each other.
It has mounting holes at positions corresponding to 0 and 11, and is fixed to the lower arm 1 through the mounting holes to prevent the upper arm 2, intermediate gear plate 3, pawl 4, etc. from coming off. 12 is a rotating shaft having an eccentric portion 12a in a part of its concentric portion. During assembly, the concentric portions of this rotating shaft 12 are formed on each of the lower arm 1 (button 14), the intermediate gear plate 3, the release lever 8, the sub-plate 9, and the guide plate 16 fixed to the sub-plate 9. The eccentric part 12
a is inserted into the rotation center hole of Atsupa arm 2,
Further, a sprocket 13 is attached to one end of the concentric portion so as to rotate together with the rotating shaft 12. As a result, the upper arm 2 and the intermediate gear plate 3 are rotatably attached to the eccentric portion 12a and the concentric portion of the rotating shaft 12, and the inner gear 2a and the outer gear 3a are engaged with each other. Note that the guide plate 16 serves to support a recessed portion of the intermediate gear plate 3 on the side opposite to the outer gear 3a. 17 is rotating shaft 1
The release arm plate is rotatably attached to the concentric portion of the release arm plate 2, and the extending portion 17b extending to the lower right in FIG. 1 serves as a walk-in pedal.
Further, a claw 19a of a hook plate 19 fixed to a connecting pipe 18 for coarse adjustment is fitted into a hole 17a formed in the intermediate portion. The connecting pipe 18 and the hook plate 19 serve to transmit the movement of the release lever 8 to the inner lock mechanism, which has substantially the same mechanism as the outer side shown in FIG. Further, the rotating tip of the release arm plate 17 is locked to the intermediate portion of the intermediate portion 8a of the release arm 8 via a stepped pin 20.

As shown in FIG. 3, a handle shaft 22 is pivotally attached to a hole 1a formed at a suitable location in the lower arm 1 via a bush 21. As shown in FIG. Reference numeral 23 denotes an E-ring fitted in a circumferential groove 22a formed near the right end of the handle shaft 22, and the E-ring 23 prevents the handle shaft 22 from coming out of the lower arm 1. 22b is a serration processing part formed on the other end of the handle shaft 22, and 22c is a serration processing part formed on the other end of the handle shaft 22.
This is a sprocket integrally formed with 2. An operating handle 24 is attached to the serration processing portion 22b, and is prevented from coming off by a snap spring 25. Reference numeral 26 denotes a cylindrical shaft support member, the flange portion 26a of which is fixed to the lower arm 1 by caulking with a pin 27.

The sprocket 22c and the sprocket 1
3, a chain 28 is wound around the chain 28, and an intermediate portion of the chain 28 is guided by a chain guide 29. Note that a spring 30 is stretched between the release lever 8 and the lower arm 1, and is used to apply a biasing force to the pawl 4 in a direction that causes it to mesh with the intermediate gear plate 3.
Also, 31 is the stepped pin 10 and 11 on the lower arm 1.
A grooved pin 32 is fixed to the pin bracket 31.
The inner end of a balance spiral spring 33 is hooked to the vertical groove of the pin 32.
A hook plate 34 is rotatably attached to the pin 32, and the outer end of the spiral spring 33 is hooked to this hook 34a. Further, the side surface of the bent portion 34b is in contact with the hook 3c of the intermediate gear plate 3. A cable locking bracket 35 is fixed to the upper arm 2 by a pin 36. This bracket 35
is for pulling out the inner cable 37a of the walk-in control cable 37 by pulling its cable end 37b when the upper arm 2 is in the forward folded state. Also, 3
Reference numeral 8 denotes a bracket that locks the end of the control cable 37 to the sub-plate 9.

The operation of the conventional device configured as described above will now be described. In the state shown in FIG. 1, the locking portion 4a of the pawl 4 meshes with the engagement tooth 3b of the intermediate gear plate 3, and the intermediate gear plate 3 is locked. Therefore, the outer gear 3a is fixed to the lower arm 1, and when the operating handle 24 is rotated, the rotating shaft 12 is rotated via the chain 28, and the upper arm 2 is also rotated at a certain level by the planetary gear mechanism. It rotates with a reduction ratio, allowing fine adjustment of the reclining angle. Next, when performing coarse adjustment, move the operating portion 8b of the release lever 8 to the first position.
All you have to do is rotate it clockwise in the figure. As a result, the pin 7 engaged with the cam hole 8c moves toward the operating handle 24 side. Therefore, the engagement between the locking portion 4a of the pawl 4 and the engagement teeth 3b of the intermediate gear plate 3 is released, and the lock of the intermediate gear plate 3 is released. Therefore, rough adjustment (fast forwarding) of the reclining angle can be performed.

Further, the walk-in operation can be performed by stepping on the walk-in pedal 17b downward in FIG. That is, when the walk-in pedal 17b is depressed, the release arm plate 1
7 rotates clockwise in Fig. 1, and the cam hole 8c
The pin 7 engaged with moves toward the operating handle 24. Therefore, the engagement between the locking portion 4a of the pawl 4 and the engagement teeth 3b of the intermediate gear plate 3 is released, and the lock of the intermediate gear plate 3 is released. Therefore, the seat back (upper arm 2) is tilted forward by the force of the spiral spring 33, and the inner cable 37a in the walk-in control cable 37 is pulled out by the cable locking bracket 35 attached to the upper arm 2. , the seat track (not shown) is unlocked and the entire seat moves forward.

<Problems to be solved by the invention> In such conventional reclining devices, the handle shaft 22 to which the operating handle 24 is attached is
As described above, since the structure is such that it is directly pivoted to the lower arm 1, parts such as the bush 21 and the bearing member 26 are indispensable, resulting in a large number of parts. Furthermore, when the pin 27 is crimped, the center of the handle shaft 22 and the bearing member 26 is shifted, which increases the operating force of the operating handle 24, which adversely affects the operability.

The present invention was devised in view of this point, and its purpose is to reduce the number of parts in the mounting structure of the operating handle to the lower arm, thereby reducing costs, reducing weight, and improving ease of assembly. An object of the present invention is to provide a reclining device with improved operability by reducing the amount of noise.

<Means for Solving the Problems> The present invention to solve the above problems uses a release lever to disengage the pawl rotatably attached to the lower arm side and the latch attached to the upper arm side. is configured to coarsely adjust the inclination angle of the upper arm, which is pivotally supported by the lower arm via a rotation shaft, and the rotation of the operating handle attached to the lower arm is controlled by a chain, the rotation shaft, and a planet. In the reclining device configured to finely adjust the inclination angle of the upper arm by transmitting the information to the upper arm via a gear mechanism, a handle shaft having an integrally formed sprocket is rotatably pivoted to a hinge shaft fixed to the lower arm. The present invention is characterized in that the operating handle is unrotatably disposed on the handle shaft.

<Example> Hereinafter, an example of the present invention will be described with reference to FIG. 4, and the same parts as in the conventional example are given the same reference numerals, and the explanation thereof will be omitted. Reference numeral 39 denotes a pin-shaped hinge shaft, which is inserted into a hole 1a drilled at a proper location in the lower arm 1, and its head 39a
is firmly fixed to the lower arm 1 by welding or the like. 39b is the head 3 of the hinge shaft 39;
This is a circumferential groove formed near the end on the opposite side from 9a. Reference numeral 40 denotes a handle shaft rotatably attached to the shaft portion of the hinge shaft 39;
A sprocket 40 is located near the lower arm 1 side end of the
a is integrally formed. 41 is the circumferential groove 3
The E-ring 41 is fitted to the E-ring 9b and serves to prevent the handle shaft 40 from slipping out from the hinge shaft 39. On the outer periphery of the end of the handle shaft 40, there is a serration processing part 40 similar to the conventional one.
b is formed to prevent the operating handle 24 from rotating.

The operation of the device of the present invention configured in this way is the same as the conventional one, so a description thereof will be omitted. However, according to the structure of the present invention, the structure for attaching the operating handle to the lower arm can be simplified, and the structure of attaching the operating handle to the lower arm can be simplified. This crimping work can be eliminated, and steering force can be reduced by preventing center deviation.

Note that the present invention is not limited to the above embodiments,
Various modifications are possible. For example, it can be applied to reclining devices other than reclining devices using a reduction gear train, and can also be applied to one-sided reclining devices.

<Effects of the invention> As explained above, according to the invention, the number of parts in the structure for attaching the operating handle to the lower arm can be reduced, resulting in cost reduction, weight reduction, and improved ease of assembly. Since the crimping installation work is eliminated, it is possible to realize a reclining device that eliminates center deviation, reduces the operating force of the operating handle, and improves operability, which is extremely practical.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the main parts of a conventional reclining device, Figure 2 is a sectional view along AA of Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
FIG. 4 is a sectional view corresponding to the BB cross section of FIG. 1 showing an embodiment of the present invention. 1...Lower arm, 2...Atsupa arm, 3...
...Intermediate gear plate (latch), 4...Pole,
8...Release lever, 12...Rotating shaft,
24...Operation handle, 28...Chain, 39
...Hinge shaft, 40...Handle shaft, 40
a... Sprocket.

Claims (1)

[Scope of utility model registration request] By disengaging the pawl rotatably pivoted to the lower arm side and the latch attached to the upper arm side using a release lever, the inclination angle of the upper arm, which is pivotally supported by the lower arm via a rotation shaft, can be changed. The rotation of the operating handle attached to the lower arm is transmitted to the upper arm via the chain, the rotating shaft, and the planetary gear mechanism, and the inclination angle of the upper arm is finely adjusted. In the reclining device configured as above, a handle shaft having an integrally formed sprocket is rotatably pivoted to a hinge shaft fixed to the lower arm, and the operating handle is non-rotatably disposed on the handle shaft. A reclining device.