JPH0332275Y2 - - 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 a vehicle, 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) In reclining devices, in order to improve the operability of the operating handle during fine adjustment, the operating handle has traditionally been placed at a position away from the rotating shaft. , a chain is used to transmit the rotation of the operating handle to the rotation shaft.

(Problem to be solved by the invention) By the way, a chain guide is provided to prevent (restrict) the middle part of the chain from vibrating greatly in the vertical direction as shown in Fig. 1 when the car is running. The conventional device had a problem in that the collision noise between the chain guide and the chain was large.

The present invention has been made in view of this point, and its purpose is to provide a reclining device that can reduce collision noise between a chain guide and a chain.

(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. The structure is configured such that the inclination angle of the upper arm, which is pivotally supported by the lower arm via a rotation shaft, is roughly adjusted, and the rotation of the operating handle attached to the lower arm is controlled by a sprocket on the operating handle side. In a reclining device configured to finely adjust the inclination angle of the upper arm by transmitting the information to the upper arm via a chain parallel to the sprocket on the rotating shaft side, the rotating shaft, and a planetary gear mechanism, A chain guide is provided which guides both intermediate portions of the chain from both sides using flanges made of synthetic resin and bends each intermediate portion into a substantially arc shape, and among the flange portions of the chain guide, the intermediate portion of the chain It is characterized in that the flange portion that slides into contact with the convex side surface of the approximately arc-shaped portion is formed into a thin wall.

(Example) Hereinafter, an example of the present invention will be described using the drawings.

In FIGS. 1 to 5, 1 is a lower arm fixed to the seat cushion side with screws, etc., and 2 is an upper arm 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 designates a pole rotatably attached to the lower arm 1 with a stepped pin 5, and has a locking portion 4a that engages with and disengages from the engagement groove 3b of the intermediate gear plate 3. Further, a pin 7 protruding toward the side opposite to the lower arm 1 is implanted near the locking portion 4a, and the pin 7 is connected to the intermediate portion 8 of the release lever 8.
It is inserted into a cam hole 8c drilled in a. 9
is a sub-plate disposed on the lower arm 1 side from the operating lever 8, and is connected to the stepped pin 5 and the stepped pin 1.
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 part of the rotary shaft 12 includes the lower arm 1 (button 14), the intermediate gear plate 3, the sub-plate 9 on which the release lever 8 is rotatably mounted, and the guide plate 16 fixed to the sub-plate 9. The eccentric part 12a is inserted into the center hole formed in each of the upper arms 2, and the sprocket 13 is attached at one end of the concentric part to rotate integrally with the rotating shaft 12. It can be installed as follows. As a result, the upper arm 2 and the intermediate gear plate 3 are each 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.

17 is a relay arm plate rotatably attached to the concentric part of the rotating shaft 12;
The extending portion 17b extending toward the lower right in the figure serves as a walk-in pedal. This protrusion 17c of the release arm plate 17 is used during assembly and is not necessarily necessary. Also, in the hole 17a drilled in the middle part, there is a hook plate fixed to a connecting pipe 18 for coarse adjustment (which transmits the movement of the release lever 8 to the locking mechanism on the inner side, which has a similar mechanism). Nineteen claws 19a are fitted. The width of this pawl 19a is selected to be smaller than the width of the hole 17a of the release arm plate 17, and is designed to absorb variations in locking position between the outer and inner locking mechanisms and prevent a half-locked state from occurring. There is. In addition, a connecting bar for fine adjustment (transmits the movement of the rotating shaft 12 to the locking mechanism on the inner side)
20 is connected to the rotating shaft 12.
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 21. The stepped pin 21 is in contact with the back of the pawl 4, and has a locking portion 4a of the pawl 4 and an engaging tooth 3 of the intermediate gear plate 3.
A roller 22 is fitted therein to ensure engagement with b.

23 is a handle shaft rotatably attached to the lower arm 1 with a hinge shaft 23a;
An operating handle 24 is attached to one end of the handle shaft 23, and a sprocket 25 is provided at an intermediate portion so as to rotate together with the handle shaft 23. A chain 26 is wound in parallel between the sprocket 25 and the sprocket 13, and both intermediate portions of the chain 26 are guided from both sides by chain guides 27 and bent into a substantially arc shape. There is. That is, this chain guide 27 is a molded product made of synthetic resin such as polyacetal, and has a flange portion 27 that slides into contact with the concave surface of the approximately arcuate intermediate portion of the chain 26.
a, 27b, and flange portions 27c, 27d that slide into contact with the convex side surface of the chain 26 (see FIG. 5). The distance between the flange portions 27a, 27b and the flange portions 27c, 27d is naturally selected to be larger than the thickness of the chain 26. Moreover, the thickness of the flange parts 27c, 27d is the same as that of the flange parts 27a, 27d.
It is thinner than the plate thickness of the plate 7b, for example, about 1 mm when the above-mentioned material is used, and is designed to be able to undergo sufficient elastic deformation (displacement). Further, reference numerals 27e and 27f in FIG. 5 are holes for attaching the chain guide 27 to the lower arm 1 using screws 27g and 27h; one attachment hole 27f is a long hole, and the other attachment hole 27 is a long hole. By rotating the chain guide 27 around
6 tension can be adjusted. To attach the chain guide 27 to the lower arm 1, remove either screw 27g or 27h (preferably screw 27g), provide a protrusion on the chain guide 27 in its place, and drill this into the lower arm 1. It may be fitted into a provided hole.

A spring 28 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. A pin bracket 29 is fixed to the lower arm 1 using stepped pins 10 and 11, and a grooved pin 30 is fixed to the pin bracket 29. The inner end of a balance spiral spring 31 is hooked to the vertical groove of the pin 30. Further, a hook plate 32 is rotatably attached to the pin 30, and the outer end of the spiral spring 31 is attached to this hook 32a.
It is hung on. Furthermore, the side surface of the bent portion 32b is in contact with the hook 3c of the intermediate gear plate 3.

33 is a cable locking bracket, pin 34
However, it is fixed to Atsupa Arm 2. This bracket 33 is for pulling out the inner cable 35a of the walk-in control cable 35 when the upper arm 2 is brought forward.

The operation of the device of the present invention constructed in this way will be explained next. In the state shown in FIG. 3, the locking portion 4a of the pawl 4 meshes with the engagement teeth 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 outer gear 3a is connected to the rotating shaft 12 via the chain 26.
rotates, and the upper arm 2 also rotates with a constant reduction ratio due to the planetary gear mechanism, allowing fine adjustment of the reclining angle. Next, when performing rough adjustment, the operating portion 8b of the release lever 8 may be rotated clockwise in FIG. 1. As a result, the roller 22 also rotates in the same direction (in order to ensure the rotation of the roller 22 in the lower arm 1,
The pins 7 and 21 pass through elongated holes), and the contact with the pole 4 is released, 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.
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 17 rotates in the clockwise direction in FIG. 1, the roller 22 also rotates in the same direction, and the contact with the pawl 4 is released. , the pin 7 engaged with the cam hole 8c 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 31, and the inner cable 35a in the walk-in control cable 35 is pulled out by the cable locking bracket 33 attached to the upper arm 2. The seat track (not shown) is unlocked and the entire seat moves forward.

According to the above configuration, even if the chain 26 comes into contact with the flange portions 27c and 27d when the automobile or the like is traveling or when the operation handle 24 is operated, the impact is alleviated by the elasticity of the chain 26. Therefore, collision noise is reduced. On the other hand, the chain 26 and the flange portion 27
The collision noise with a and 27b is the same as that of the conventional device, but since this collision noise is originally small, there is no problem.

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, collision noise between the chain and the chain guide can be reduced.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the main parts of an embodiment of the present invention, Figure 2
The figure is a sectional view of AA in figure 1, and figure 3 is BB of figure 1.
4 is a CC sectional view of FIG. 1, FIG. 5 is an explanatory diagram of the outer shape of the chain guide, A is a front view, and B is a DD sectional view of A. 1...Lower arm, 2...Atsupa arm, 3...
...Intermediate gear plate (latch), 3b...engaging tooth,
4...Pole, 8...Release lever, 9...Sub plate, 12...Rotating shaft, 13...Sprocket, 17...Release arm plate,
17b...Walk-in pedal, 18...Connecting pipe, 19...Hook plate, 2
0... Connecting bar, 22... Roller, 2
3...Handle shaft, 24...Operation handle, 26
...Chain, 27...Chain guide, 27
a, 27b...flange part, 27c, 27d...
Flange part, 27e, 27f...Mounting hole, 27
g, 27h...screw, 31...spiral spring, 32...hook plate.

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. and a chain suspended in parallel between a sprocket on the operating handle side and a sprocket on the rotating shaft side to control the rotation of the operating handle attached to the lower arm; and a reclining device configured to transmit information to the upper arm via a planetary gear mechanism to finely adjust the inclination angle of the upper arm, wherein both middle portions of the chain are guided from both sides by flanges made of synthetic resin, respectively. A chain guide is provided that bends each intermediate portion into a substantially arc shape, and the flange portion of the chain guide that slides into contact with the convex surface of the approximately arc shape of the middle portion of the chain is made thin. A reclining device characterized by being molded.