JPS6319619Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention can be bent to any desired angle.
The present invention also relates to a movable coupling device having a simple structure and capable of maintaining a state bent at a required angle.

Conventionally, such a device has a connecting portion in which both members are pivotally supported by a pin, in which an arcuate groove having a plurality of locking recesses is bored at the end of one member along its arcuate end surface, and A locking pin is installed at the end of the member so as to be inserted into the circular arc groove from the side, and the locking pin is fitted into the locking recess while sliding in the circular groove. Are known. However, since this device must be manufactured so that the circumferential side of the locking pin reliably contacts the locking recess, a high degree of processing accuracy is required, and therefore, it is necessary to manufacture small robots, miniature cars, etc. When used in small toys, it is difficult to manufacture, the manufacturing cost is high, and since the circumferential side of the locking pin contacts the locking recess, the area of contact between them is large, and therefore the locking pin has to be bent repeatedly. However, there were disadvantages such as the fast wear of the locking pin, which caused problems with the lifespan of the movable coupling device.

Therefore, the object of the present invention is to provide a movable coupling device that eliminates the above-mentioned drawbacks, has a simple structure, and can operate over a long period of time. By forming a plurality of recesses along the direction and attaching a projection to the other end that can be freely engaged and detached from the recesses, the movable coupling device can be bent at a desired angle and maintained in that state. That's what I did.

An embodiment of the present invention will be described in detail below based on the drawings.

The figure is an exploded perspective view of essential parts of a movable coupling device used between the lower leg and thigh of a robot as an embodiment of the present invention.

Reference numeral 1 designates the lower leg portion of the robot which is integrally molded to have a U-shaped cross section, and is composed of side walls 2, 2 and a bottom portion 3 that stand side by side. Pin holes 4, 4 are formed in the end portions of the side walls 2, 2 so as to face each other, and a through hole 5 is formed in the bottom portion 3, directly below the approximate middle between the pin holes 4, 4. Further, a leaf spring 6 is fixedly attached to the lower surface of the bottom part 3 by a machine screw 7 located in the middle part of the bottom part 3, and a projection 8 is provided on the leaf spring 6 at a position corresponding to the through hole 5. It is being Therefore, the leaf spring 6 is bent downward as shown in the figure in response to a downward load acting on the protrusion 8, so that the protrusion 8 protrudes and retracts into the through hole 5. Therefore, the leaf spring 6 and the protrusion 8
constitutes a locking means that can be freely engaged and detached from the recessed portion, which will be described later.

On the other hand, reference numeral 9 is a thigh portion whose end face is arcuate with the pin hole 10 as the center, and a plurality of recesses 11, 11, . . . are formed in the arcuate end face along the axial direction. Then, the pin 12 is inserted so that the pin hole 4 of the lower leg 1 and the pin hole 10 of the thigh 9 are coaxial, and the lower leg 1 and the thigh 9 are rotatably connected. and the protrusion 8 is adapted to be locked in the recess 11.

Now, when the lower leg part 1 is rotated about the pin 12 in the direction of the arrow shown in the figure, the protrusion 8, which is biased toward the arcuate end surface due to the bending force of the leaf spring 6, moves into the recess 1.
Overcome 1, 11... one by one. Therefore, when the lower leg 1 is stopped at the required angle, the protrusion 8 moves into the recess 1.
1, and therefore the movable coupling device can be reliably maintained in the folded state.

In this embodiment, a leaf spring and a protrusion provided on the leaf spring are used as the locking means, but a small ball that can be freely retracted and retracted by a spring may also be used.

Further, in this embodiment, the case where the movable coupling device is used in a robot has been described, but it goes without saying that this device can also be used in the joints of dolls and animal toys, folding ladders, crane arms, folding measures, etc.

As described above, according to the present invention, a plurality of recesses are formed in the arcuate end surface of one member along the axial direction, and a locking means that can be freely engaged and detached from the recesses is provided at the end of the other member. Because it is equipped with a leaf spring, it does not have a complicated structure and cannot be used for small toys, etc. like the conventional ones mentioned above, and it operates reliably over a long period of time, and the structure is simple, reducing costs. It has the effect of

[Brief explanation of the drawing]

The figure is an exploded perspective view of essential parts showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Lower leg part, 6, 8... Leaf spring and protrusion which constitute a locking means, 9... Thigh part, 11... Recessed part.

Claims (1)

[Scope of utility model registration request] It consists of a first member and a second member rotatably supported by the first member, and the first member has a bottom surface with a through hole formed on the pivot side, and a bottom surface of the bottom surface. The main body consists of side surfaces formed upright on both sides, one side is fixed to the opposite side of the pivot side on the back side of the bottom, the other side of the pivot side is a free end, and the upper surface of this free end side is fixed. The second member has an elastic plate formed with a protrusion projecting from the through hole, and the second member has an arcuate end on the pivot side, and the arcuate end surface has an elastic plate that is removably engaged with the protrusion. A movable coupling device characterized in that a plurality of concave portions that fit together are formed.