JPS61199810A - Seat reclining apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a base plate that is fixed to the side surface of the seat cushion, and a lower end side of the arm that is fixed to the side surface of the seat back is rotatably attached to the base plate that is fixed to the side surface of the seat cushion. upper teeth are provided on the base plate, lower teeth that engage with the upper teeth are provided on tooth members that are swingably attached to the base plate, and the upper teeth and lower teeth can be engaged or disengaged by moving the free end side of the tooth member up and down. This invention relates to a seat reclining device.

[Conventional technology]

Conventional seat reclining devices are shown in Figs. 7 and 8.
As shown in the figure, the lower end side of an arm 4 fixed to the side surface of the seat back 3 is rotatably attached to a base plate 2 fixed to a seat cushion 1, and an upper tooth 100 is formed at the lower end of the arm 4. A tooth member 101 swingably attached to the base plate 2 is provided with a lower tooth 102 that engages with an upper tooth 100, and by moving the free end side of the tooth member 101 up and down with a release lever 103, the upper tooth 100 and the lower tooth 102 are separated. It was used to engage and disengage the teeth.

[Problem to be solved]

In the conventional gym reclining device, when the tooth member 101 swings, the lower teeth 102 and the upper teeth 10o that mesh with the lower teeth 102 interfere with each other, and this interfering part is worn out or damaged, and furthermore, the reclining There was a drawback that the operation was not smooth. especially,
The reliability of the swinging operation of the tooth member 101 could not be expected.

Therefore, this invention ensures the rocking operation of the tooth member, ensures accurate engagement, and by rocking the tooth member with a cam plate, it is possible to select the material that suits each material, thickness, etc. To provide a seat reclining device which is easy to process and is advantageous in terms of accuracy, strength, durability, and cost.

[1/'1 Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has a cam plate rotatably attached to a base plate with a pin, and a cam receiving portion on the lower surface of the free end side of the tooth member. A recessed portion is formed from the cam receiving portion toward the proximal end side, and a protruding release hook is formed to connect to the end of the recessed portion, and a lock cam that supports the cam receiving portion on the cam plate and fits into the recessed portion is formed. In addition, a notch is formed by cutting out the adjacent part of the lock cam near the tooth member, and a lever spring is attached to the tooth member to bias the lower tooth in a direction that constantly engages the upper tooth, and both side walls of the notch are aligned with the cam plate. When the cam plate rotates in one direction, the release hook is pushed down, and when the cam plate rotates in the other direction, the release hook is held.

[Effect]

In this invention, the cam plate is rotated through the release lever or by other means, and when the cam plate is rotated, the lock cam is disengaged from the cam receiving part of the tooth member, and then the side wall of the cam plate is attached to the release hook of the release lever. Hit it and push this down. As a result, the tip of the tooth member rotates downward, and as a result, the lower tooth disengages from the upper tooth, and the side wall of the cam plate hits the tip of the cam receiving portion and stops.

The engagement of the lower teeth with the upper teeth is achieved by the tensile force of the lever spring by opening the release lever.

That is, the lower tooth rotates in the engaging direction due to the tensile force of the lever spring, and at the same time, the cam plate combined with the release lever also rotates in the locking direction. The lock cam of the cam plate pushes up the cam receiving part of the tooth member, thereby assisting the engagement by the lever spring of the tooth member, and furthermore, the side wall of the lock cam holds the release hook of the tooth member, thereby making the engagement more reliable.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

An arm 4 is rotatably attached to the lower end side of the arm 4 fixed to the side surface of the seat back 3 on a base plate 2 fixed to the side surface of the seat cushion 1, and an outer peripheral edge of the lower end of an upper tooth member 5 attached to the lower end side of the arm 4. An upper tooth 6 is formed in a certain area of the tooth member 7, and a lower tooth 8 that engages with the upper tooth 6 is formed in a certain area of the upper end of a tooth member 7 which is swingably attached to the base plate 2. A hole 2A is formed in the base plate 2, and one end of the arm shaft 9 is inserted through the hole 2A. An upper tooth member 5 is fixed to the arm 4 with a plurality of rivets 10.

The other end of the arm shaft 9 is rotatably inserted into the holes 4A and 5A of the integrated arm 4 and upper tooth member 5. The upper tooth member 5 has a bend 811
11 is formed, and the bent portion 11 fits into a long hole 2B formed in the base plate 2. A notch 12 is formed in this bent portion 11, and a hook portion 14 of a return spring 13 is engaged with this notch 12. The hook portion 14 of the return spring 13 is cut toward the center on both sides in the width direction, and this narrow portion corresponds to the notch 1 of the bent portion 11.
2, and the hook portion 14 is approximately the same as the width of the notch 12.
The wide part of the upper end of the hook part 14 is fitted into the notch 12.
It will get caught on the top of the. The other end of the arm shaft 9, which has passed through the hole 4A of the arm 4 and the hole 5A of the upper tooth member 5, is inserted into the hole 15A of the plate holder 15 and caulked. Therefore, the arm 4 and the upper tooth member 5 are connected to the base plate 2 and the plate holder 15.
It looks like it is being held between the two, and can be rotated with respect to the base plate 2. A mounting hole 2C is opened on the lower side of the base plate 2,
A collar 16 is inserted into the hole 2C and attached by caulking, and one end side of the tooth member 7 is attached to the collar 16 so as to be swingable. That is, the hole 7A of the tooth member 7 fits into the collar 16 and rotates around the collar 16. A cam receiving part 17 is formed on the lower side of the tip side of the tooth member 7, and a protruding release hook 18 connected to the end of the recessed part 17A is formed near the middle part.

Further, one end of a pin 19 is caulked into the hole 2D of the base plate 2, and a release lever 20 and a cam plate 21 are swingably attached to this pin 19.

The bent portion 22 of the release lever 20 fits into a recess 23 formed on the lower surface of the cam plate 21, so that the release lever 20 and the cam plate 21 move together. Further, a lock cam 24 is formed on the upper surface of the cam plate 21, and is positioned opposite to the cam receiving portion 17 of the tooth member 7, so as to lock the tooth member 7 when the lower teeth 8 are engaged with the upper teeth 6. It has become. That is, when the surface of the lock cam 24 comes into contact with the surface of the cam receiver 17, the distal end side of the tooth member 7 is raised and held, thereby creating a state in which the lower teeth 8 are engaged with the upper teeth 6. . Roughly speaking, on both sides of the lock cam 24 of the cam plate 21,
A cutout 25,26 is formed in each case, and side walls 27,28 on each side of the cutout 25 function as follows. i.e. side g! 27 is located opposite to the upper surface of the release hook 18 of the tooth member 7, and the upper surface is pushed during sliding adjustment to release the engagement between the lower teeth 8 and upper teeth 6 of the tooth member 7;
8, and serves as a stopper during locking to restrict movement of the cam plate 21 (see FIGS. 2 and 3).

The side of the other notch 26 that is far from the lock cam 24! 2
Reference numeral 9 serves as a stopper that limits the movement of the cam plate 21 when the cam plate 21 is released. Furthermore, a lever spring 30 is attached between the tooth member 7 and the bent portion 22 of the release lever 20, and they are pulled together in the locking direction.

When providing the same mechanism on both sides of the seat, the interlocking shaft 31 is rotatably inserted into the hole 2E of the base plate 2, and a gear 32 is fixed to both ends of the interlocking shaft 31, and this gear 32 is connected to the release lever 20. What is necessary is just to construct it so that it may mesh with the tooth part 33 formed in .

Therefore, by operating the release lever 20 of either one of the mechanisms on both sides of the seat, the tooth portion 33 is moved to the gear 3.
2 and the interlocking shaft 31, and release the other release lever.
It becomes possible to operate 20 devices at the same time.

A cover 34 is placed on the outside of the base plate 2, and this cover 34 is brought into close contact with the arm 4.

This cover 34 is fixed to one end side of the arm shaft 9. Furthermore, the notch portion 35 on one end side of the arm shaft 9 inserts the center portion 36 of the return spring 13.

When the components shown in FIG. 1 are assembled, the structure will be as shown in FIG. 4. The seat back 3 rotates within the angular range θ shown in FIG. The cam plate 21 is assembled as shown in the fifth factor, and the rotation part of the arm 4 is assembled as shown in FIG.

The upper teeth 6 and the lower teeth 8 are formed by plastically working the peripheral edges of the upper teeth member 5 and tooth member 7 to increase the thickness of the tooth portions. Each tooth6.
The thickened portion where 8 is formed is molded to have approximately the same thickness as the conventional tooth forming portion or a thickness smaller than that. The thickened portion is formed using a hot gear rolling process using tooth 6.
This is done at the same time as forming 8. In this processing, the portion to be thickened is heated using high frequency waves or the like, and immediately after heating, rolling forming gears that mesh with the respective teeth 6.8 are pressed and rotated. Furthermore, when molding the teeth 6.8 when molding the thickened portion, it is preferable that walls be molded on both sides of one of the teeth 6 or 8 in the width direction (thickness direction). If such a wall is created, there will be no fear that the engagement between the teeth 6 and 8 will shift in the width direction.

According to the embodiment of the present invention configured as described above,
By pulling up the release lever 20, the bending portion 2
2, the cam plate 21 is also rotated. When the cam plate 21 rotates, the lock cam 24 engages the tooth member 7.
It comes off from the cam receiving part 17 and the side! 29 is the cam receiver 81117
It hits the tip of and stops. As a result, the lower tooth 8 disengages from the upper tooth 6, and the side wall 27 attempts to push down the release hook 18. Therefore, the tip of the tooth member 7 rotates downward. At this time, adjust the seat back 3 to the desired position of the seated person, and
/ Once the release lever 20 is pulled up, the tooth member 7 will rise again due to the action of the lever spring 30, and the lower teeth 8 and upper teeth 6 will engage at the desired position. At this time, the lock cam 24 moves smoothly from the recessed part 17A to the cam receiving part 17, so that the teeth of the lower tooth 8 and the upper tooth 6 are corrected for interference with each other, and the tooth member 7 is brought into accurate engagement. Raise the tip and side!
When the release hook 28 comes into contact with the lower surface of the release hook 18 and attempts to lift it, the engagement is firmly maintained. When the release lever 20 is pulled up and no force is applied to the seat back 3 to push it backward, the seat back 3 will fall forward due to the spring force of the return spring 13.

In the above embodiment, the release lever 20 is used as a means for rotating the cam plate 21. However, a portion of the lever may be formed to extend from the cam plate 21, or a portion of the lever may be formed by forming a portion of the lever on the cam plate 21. Of course, it may be attached.

〔effect〕

As explained above, according to the present invention, the cam plate is rotatably attached to the base plate with a pin, and a cam receiving portion and a cam receiving portion are formed on the lower surface of the free end side of the tooth member and extending from the cam receiving portion toward the base end side. A recessed portion and a protruding release hook connected to the end of the recessed portion are formed to support the cam receiving portion on the cam plate, and a lock cam that fits into the recessed portion is formed, and an adjacent portion of the lock cam near the tooth member is cut out. A notch is formed, and both side walls of the notch push down the release hook when the cam plate rotates in one direction, and hold the release hook when the cam plate rotates in the other direction. Like, it casts a remarkable effect. In other words, the rotation of the cam plate is transmitted to the tooth member, and since the side walls of the cutout portion of the cam plate rotate the tooth member downward and upward, the cam plate and As for the means for rotating this, it is possible to select materials suitable for each material such as material and thickness, and processing can be done separately and is relatively easy. It is also advantageous. In addition, since the tooth member is constantly exerted a force to rotate in the locking direction by the lever spring, the movement is smooth without applying excessive force to the cam plate, and the tooth member can be operated accurately to ensure reliable engagement and engagement. The cancellation will take place.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing a preferred embodiment of the present invention, Fig. 2 is an explanatory view showing the state when the tooth member is engaged with the cam plate, Fig. 3 is an explanatory view when the tooth member is disengaged, and Fig. 4 is a side view of the assembled state, Figure 5 is Figure 4 v
-v line sectional view, FIG. 6 is a cross-sectional view along line 4--4, FIG. 7 is a side view of the conventional device, and FIG. 8 is a diagram illustrating the engagement of the conventional device. 1... Cushion seat, 2... Base board, 3... Seat back, 4...
・Arm, 6... Upper teeth, 7... Teeth member, 8... Lower teeth, 17... Cam receiver, 17Δ... Recessed part, 18... Release hook, 19... Pin, 21... Cam plate, 22... Bent part, 23... Recessed portion, 24... Lock cam, 25... Notch, 27.28... Side wall,

Claims (1)

[Claims] 1. The lower end side of the arm fixed to the side surface of the seat back is rotatably attached to the base plate fixed to the side surface of the seat cushion, upper teeth are provided at the lower end of the arm, and the base plate is provided with swingable teeth. In a seat reclining device in which a movably attached tooth member is provided with a lower tooth that engages with an upper tooth, and the upper teeth and lower teeth are engaged or disengaged by moving the free end side of the tooth member up and down with a release lever, a cam is used. The plate is rotatably attached to the base plate with a pin, and a cam receiver and a recess formed from the cam receiver toward the proximal end are provided on the lower surface of the free end of the tooth member, and a protruding release hook connected to the end of the recess. A lock cam is formed to support the cam receiving part on the cam plate and fit into the recessed part, and an adjacent part of the lock cam near the tooth member is cut out to form a notch, and the lower tooth is connected to the upper tooth in the tooth member. A lever spring is installed that always biases the cam plate in the direction of engagement, so that the walls on both sides of the notch push down the release hook when the cam plate rotates in one direction, and hold the release hook when the cam plate rotates in the other direction. A seat reclining device characterized by comprising: 2. Rotatably attach the release lever to the pin on which the cam plate is attached, and fit the bent portion formed on the release lever into the recess formed on the cam plate, so that the release lever and cam plate are integrated. The seat reclining device according to claim 1, wherein the seat reclining device is configured to rotate.