JPH0540760Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a device for fixing the operating lever of a gas cylinder incorporated in a rotating chair.

Problems to be Solved by Conventional Technologies and Ideas Products that incorporate functions such as adjusting the angle of the backrest and raising and lowering the seat of a rotating chair are well known, but in recent years there have been no improvements as a mechanism for controlling these devices. A method using a raw gas cylinder is adopted.

This is a product that incorporates a mechanism for adjusting the back and seat angles using a gas cylinder in a rotating chair.In addition to simply adjusting the angle, it also has an operating lever that allows the back and seat to move freely within the range of motion. It is necessary to fix the operating lever in the adjusted state, and the present invention seeks to provide an operating lever fixing device for this purpose.

Means for Solving the Problems This invention has the feature that the operating lever of the gas cylinder can be fixed easily and reliably, and a notch 2 is opened in a part of the seat cover 1, and a wire for operating the gas cylinder is provided. The operating lever 3 connected to the cable 4 is inserted into the wall 1 inside the seat cover 1 through the notch 2.
A is rotatably mounted on the operating lever 3 with an eccentric shaft 5, and a lock lever 7 is rotatably mounted on the operating lever 3 with a shaft 6. 7b, a lock spring 8 having a finger rest 7c protruding downward at its base and bent into a dogleg shape, the long side 8a of the lock spring 8 is placed on the side of the eccentric shaft 5 of the operation lever 3, and the short side 8b is placed on the side of the eccentric shaft 5 of the operation lever 3. lock lever 7
When the lock lever 7 is rotated to a substantially horizontal position, the stepped portion 7a of the lock lever 7 engages with the wall 1b and the protruding piece is engaged with the wall 1b. 7b is wall 1b
The gist of the configuration is such that it fits into the notched recess 9.

Embodiment The details of the present invention will be explained below with reference to an embodiment shown in the drawings. 1 is a seat cover, 2 is a notch formed in a part of the seat cover 1, and 3 is a hole in the seat cover 1 through the notch 2. A control lever 4 is rotatably mounted on the wall 1a with an eccentric shaft 5, and 4 is a wire cable for operating the gas cylinder, which is directly connected to the control lever 3, and as the control lever 3 rotates upward. The wire cable 4 pulls the valve mechanism of the gas cylinder to operate the gas cylinder. 7
is a lock lever rotatably mounted on the operating lever 3 with a shaft 6, and has a stepped portion 7a at the tip.
The protruding piece 7b has a finger abutment part 7c projecting downward at the proximal part, and the lock spring 8 always presses the proximal part of the lock lever 7 downward. The lock spring 8 has a dogleg shape as a whole, and its long length 8a is connected to the eccentric shaft 5 of the operating lever 3.
On the other hand, the short sides 8b are engaged with approximately the center of the lock lever 7, respectively. Reference numeral 9 denotes a cutout recess provided in the wall 1b inside the seat cover 1, and when the lock lever 7 rotates upward and is displaced to a substantially horizontal state, the projecting piece 7b of the lock lever 7 moves into the cutout recess 9.
At the same time, the stepped portion 7a comes into contact with the wall 1b.

Functions and Effects of the Invention Accordingly, in the present invention, when the operating lever 4 and the locking lever 7 are rotated in the direction of the arrow in FIG. 1 and displaced to a substantially horizontal state as shown in FIG. The spacing between the lock levers 7 narrows, and the lock spring 8 becomes compressed, and the pressure of the spring acts strongly toward the tip of the lock lever 7. With the protruding piece 7b of the lock lever 7 fitted into the notch recess 9, the stepped portion 7a becomes the wall 1b. The lock lever 7 is fixed by the returning force of the operating lever 3 and the reaction force of the lock spring 8. Further, in the state shown in Fig. 2, when the operating lever 3 is slightly pulled up and the finger rest 7c of the lock lever 7 is pushed downward and the operating lever 3 is released, the operating lever 3 returns to its original position and the locked state of the lock lever 7 is released. It is something.

As mentioned above, the operating lever 3 can be fixed easily and reliably by upward rotation of the operating lever 3 and the lock lever 7, and when the operating lever 3 is released, the lock lever can be locked while the operating lever 3 is slightly pulled up. By rotating the lever 7 downward, the locked state of the operating lever 3 is released, thereby providing an extremely convenient operating lever fixing device in which the operating lever 3 can be fixed simply and quickly with one touch. It's something you get.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of the main part, and FIG. 2 is a sectional view of the main part in a locked state. 1...Seat cover, 3...Operation cover, 7...Lock lever, 9...Notch recess.

Claims (1)

[Scope of utility model registration request] A notch 2 is provided in a part of the seat cover 1, and an operating lever 3 connected to a wire cable 4 for operating a gas cylinder is connected to an eccentric shaft 5 on a wall 1a inside the seat cover 1 through the notch 2. A lock lever 7 is rotatably mounted on the operating lever 3 with a shaft 6, and the lock lever 7 has a stepped portion 7a and a protruding piece 7b at its distal end, and a protruding piece 7b at its proximal portion. The lock spring 8 has a finger rest 7c projecting downward and is bent into a dogleg shape.The long side 8a of the lock spring 8 is attached to the side surface of the eccentric shaft 5 of the operation lever 3, and the short side 8b is attached to the middle part of the lock lever 7. When the lock lever 7 is rotated to a substantially horizontal position, the stepped portion 7a of the lock lever 7 engages with the wall 1b, and the protruding piece 7b presses the lock lever 7 downward. A gas cylinder operating lever fixing device for a chair, which fits into a notched recess 9 of the chair.