JPS64127Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an armrest rotation angle adjustment device, and more particularly to an armrest rotation angle adjustment device that can freely change the inclination angle with respect to the backrest of a seat.

Generally, seats or car doors are often provided with armrests for resting the arms and the like. For example, in the case of the armrest 30 fixed to the backrest 10 as shown in FIG. It is easy to rest your arm on the 30. However, when the backrest 10 is tilted backwards from the state shown in FIG. 1A, the armrest 30 also tilts together with the backrest 10, making it impossible to rest the arms in this state. Also, Figure 1C
When the backrest part 10 is tilted forward, the armrest 30 hits the seat side, and the backrest part 10
There were times when I couldn't fall forward the required amount. In addition, there are cases where the armrest 30 is freely rotatable,
In order to move the armrest 30, it is necessary to release the lock, and this is inconvenient as the user has to perform the unlocking operation every time the backrest 10 is tilted backward or forward.

The present invention was made to eliminate the above-mentioned drawbacks of the conventional technology, and it is possible to place the armrest in the best position regardless of the inclination of the backrest, and also to allow the armrest to be rotated and fixed at the same time. The purpose of the present invention is to provide a rotation angle adjustment device for an armrest that is both easy to use and highly safe.

The present invention will be explained below with reference to the illustrated embodiments.

An armrest 2 equipped with an armrest rotation angle adjustment device which is an embodiment of the present invention shown in FIG.
is rotatably attached to the backrest portion 3. If the lever 4 linked to the rotation angle adjustment device disposed inside the armrest 2 is operated up or down, the lever 4 is moved in the same direction as the operation direction.
If the armrest 2 is moved upward, the armrest 2 will rotate clockwise. After rotating the armrest 2 to the desired position, return the lever 4 to its original neutral state (a spring is attached to the lever 4 so that it is always in the neutral state).
Rotation of the armrest 2 is locked.

Next, the rotation angle adjusting device 1 disposed within the armrest 2 will be explained with reference to FIG. 3. A shaft 5 that extends perpendicularly to the side surface of the backrest 3 is fixed to the backrest 3. The shaft 5 has a cylindrical shape on the base end side and a square columnar shape on the distal end side. The cylindrical portion of the shaft 5 has a substantially U-shaped cross section, and has an armrest 2.
A horizontally long frame 6 constituting the is rotatably inserted. An adjusting member 7 having a peripheral edge portion 71 projecting from the upper half of the flat plate is fixed to a portion of the frame 6 through which the shaft 5 is inserted. A hole 72 through which the shaft 5 is inserted is bored approximately at the center of the adjustment member 7, and upper ends of symmetrical lock members 73, 74 are rotatably mounted above the hole 72. The locking members 73 and 74 are formed into L-shaped rods, and their short axes serve as rotational axes. Also, the locking members 73 and 74 and the peripheral edge 71 of the adjusting member 7
Springs 75 and 76 are disposed between the lock members 73 and 74 to bias the lock members 73 and 74 toward each other. A square prism-shaped portion of the shaft 5 passing through the adjustment member 7 is fitted with a center portion of a lock gear 8 having triangular ridge-shaped teeth formed around the periphery. When the lock gear 8 is installed in a predetermined position on the shaft 5, the lock gear 8 and the lock member 7 of the adjustment member 7
3 and 74 mesh with each other to limit rotation of the adjustment member 7 and the frame 6. Furthermore, a spacer 81, which is made up of two cylindrical members having different diameters, is fitted into the shaft 5 adjacent to the lock gear 8. A disk-shaped rotating member 9 is rotatably inserted into the small diameter portion of the spacer 81 . A square columnar pin 92 and a semicircular push plate 93 are fixed to the rotating member 9 and are opposed to each other with a center hole 91 through which the shaft 5 is inserted. These pins 92 and push plate 93 extend toward the adjustment member 7 side, and
2 is located between lock members 73 and 74, and press plate 9
3 is located below the peripheral portion 71. Further, a lever 4 is integrally attached to the rotating member 9. This lever 4 has a spring 4 that is locked to locking parts 61 and 62 provided on the frame 6.
1,42 are attached. The lever 4 is pulled upwardly by the spring 41 and downwardly by the spring 42, and since the pulling forces of both are equal, the lever 4 always remains in the fixed position, and at this time the pin 92 of the rotating member 9
is located between lock members 73 and 74. Furthermore, shaft 5 has washers 9
The outer plate 63 of the frame 6 is inserted through the
A nut 96 is engaged with the shaft 5 protruding from the outer plate 63 via a washer 95. The outer plate 63 is attached to the frame 6 with screws or the like, and the above-mentioned members are housed between the frame 6 and the outer plate 63. Also, the outer plate 63
A rectangular window 64 is formed in the window 64, from which a portion of the lever 4 protrudes.

Furthermore, the operation of the armrest rotation angle adjusting device 1 constructed as described above will be explained with reference to FIG. 4. In the state shown in FIG. 4A, the lever 4 is not operated, the rotating member 9 is fixed, the lock members 73 and 74 mesh with the lock gear 8, and the adjusting member 7 and the frame 6 are rotated. is restricted. From this state, when the lever 4 is first lifted upward inside the window 64 by hand or the like, the lever 4 rotates until it comes into contact with the upper end of the window 64. Lever 4
At the same time, the rotating member 9 also rotates, and the pin 92 and push plate 93 also rotate clockwise. The pin 92 then rotates clockwise to push the lock member 74 against the biasing force of the spring 76, thereby releasing the engagement between the lock gear 8 and the lock member 74. Furthermore, at this time pin 92
The push plate 93 that rotates together with the peripheral edge 7 of the adjustment member 7 also
1, resulting in the state shown in FIG. 4B. From this state, if the lever 4 is rotated to lift it further upward, the lock member 73 repeats the movement of overcoming the teeth of the lock gear 8 and meshing with the next tooth, and rotates around the lock gear 8. , adjustment member 7
is pushed by the push plate 93 and rotated clockwise, and the frame 6 to which the adjustment member 7 is fixed also rotates. The rotation of the adjusting member 7 in the counterclockwise direction is prevented by the engagement between the lock member 73, which is pushed toward the lock gear 8 by a spring 75, and the lock gear 8. After the armrest 2 is in the desired position by the rotation of the frame 6, when the lifting of the lever 4 is released, the lever 4 returns to the neutral state shown in FIG. 7
4, the lock member 74 again meshes with the lock gear 8, the rotation of the adjustment member 7 is stopped, and the arm 2 is fixed at a desired position. To rotate the armrest 2 in the counterclockwise direction opposite to the above case, move the lever 4 until it abuts the lower end of the window 64, and push the locking member 73 with the pin 92 of the rotating member 9. Then, the engagement between the lock member 73 and the lock gear 8 is released, and the adjusting member 7 is rotated counterclockwise. Then, when the lever 4 is further rotated counterclockwise, the push plate 93 rotated together with the pin 92 pushes the peripheral edge 71 of the adjustment member 7, the adjustment member 7 is rotated, and the frame 6 is also rotated counterclockwise. Rotate. Note that even if a force is applied to the armrest 2 in the same direction as the rotation direction while operating the lever 4, if the armrest 2 rotates even slightly due to this force, the positions of the locking members 73 and 74 will change. As a result, the pin 92 is at an intermediate position between the two, the lock members 73 and 74 mesh with the lock gear 8, and the armrest 2 is fixed.

Another embodiment shown in FIG. 5 will be described. This rotation angle adjustment device 1A is obtained by adding changes to the adjustment member 7A and lock gear 8 in the rotation angle adjustment device 1 shown in FIG. 3, and the other configurations are the same as those in FIG. 3. The same reference numerals will be given and the explanation will be omitted. Adjustment member 7A of rotation adjustment device 1A
Projections 71A and 71'A are formed above the left and right sides of the rotary member 9, and the push plate 93 of the rotating member 9 comes into contact with the projections 71A and 71'A. Further, the lock members 73A and 74A rotatably attached to the adjusting member 7A are formed into a substantially wave shape, have a pawl formed at the lower end, are rotatably attached at the middle part, and have a spring 7.
5 and 76, the claws at the lower end are biased toward each other. This lock member 73A, 7
The lock gear 8A that meshes with the lock gear 4A is formed by fixing two ratchet wheels with opposite teeth to one another. And lock gear 8A and lock member 73
The adjusting member 7A is rotated by engaging and releasing the lock gear 8A and the lock members 73A, 74A.However, in order to release the mesh between the lock gear 8A and the lock members 73A, 74A, the upper end of the lock members 73A, 74A must be Pins 92A, 92 fixed to the rotating member 9 located at
B is moved along with the rotation of the rotating member 9, and the pin 92A is moved.
Alternatively, the lock member 73A or 74A is pushed by the lock member 92B to release the engagement between the lock member 73A, 74A and the lock gear 8A. The operation of the rotation angle adjusting device 1A is also similar to that shown in FIG. 3.

In addition, in the armrest rotation angle adjustment device 1A of the present invention, since the armrest 2 can be rotated 360 degrees and fixed at a desired position, for example, as shown in FIG. If applied to a swing type seat that moves back and forth, the armrest 2 can always be in the optimal position, which is very convenient.

In the above embodiment, the locking member is provided on the adjusting member, but it may be directly attached to the frame. In addition, the adjustment member was rotated by being pushed by a push plate, but a long hole was provided in the adjustment member so that the pin moved inside the long hole, and the adjustment member was moved by contact between the pin and the end of the long hole. It is also possible to rotate.
Furthermore, other configurations are not limited to the above embodiments.

As explained above, the present invention includes a shaft fixed to the side of the seat back, a frame and a lock gear attached to the shaft, and a mechanism that meshes with the lock gear attached to the frame to restrict rotation of the frame. It consists of a locking member and a rotating member rotatably attached to the shaft, which has a pin that comes into contact with the locking member to release the locking member from the locking gear. Therefore, it is possible to rotate and lock the rotation of the armrest in one operation, and it is possible to provide an armrest that is very easy to handle. Furthermore, rotation in the direction opposite to the rotation direction of the armrest is always locked by the lock member on the other side that meshes with the lock gear from a predetermined direction, so it is safe. Furthermore, since the number of parts is small, it is easy to assemble and is less likely to break down.

[Brief explanation of drawings]

Fig. 1 is a side view of a seat showing a conventional example, Fig. 2 is a partially omitted side view of a seat illustrating an embodiment of the present invention, and Fig. 3 is an exploded perspective view showing an embodiment of the present invention. Figure 4 is a simplified diagram illustrating the operation of the rotation adjustment device when the armrest is A fixed, B rotated clockwise, and C counterclockwise, respectively; Figure 5 is an exploded perspective view showing another embodiment; FIG. 6 is a side view of a seat showing an example of application of the present invention. 1,1A...Rotation angle adjustment device (of armrest), 5...Shaft, 6...Frame, 8,8
A... Lock gear, 9... Rotating member, 73,7
4,73A,74A...Lock member, 75,76
...Spring, 92...Pin.

Claims (1)

[Scope of claim for utility model registration] Shaft 5 fixed to the side of the seat backrest
, a frame 6 constituting an armrest and rotatably attached to the shaft 5, and lock gears 8, 8 fixed to the shaft 5.
A, a pair of lock members 73, 74, 73A attached to the frame 6 and meshing with the lock gears 8, 8A by the elastic force of springs 75, 76 to restrict rotation of the frame 6 in both forward and reverse directions; 74A and this pair of locking members 73, 74, 73A, 7
Lock members 73, 74, 73A, 7 to the lock gear 8 by selectively abutting on either side of the lock gear 4A.
Pin 92 for releasing engagement on either side of 4A
and a rotating member 9 rotatably attached to the shaft 5, and the rotation of the rotating member 9 locks the lock gears 8, 8A and the lock members 73, 74, 73A, 74.
A rotation angle adjustment device for an armrest, characterized in that it is configured to release the engagement with the armrest A and to give rotation to the frame 6.