JPH0747661Y2 - Rotary operation lever - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary operation type operation lever for opening and closing a valve and the like, which is made of sheet metal.

[0002]

2. Description of the Related Art A conventional example of a rotary operation lever will be described below. In the embodiment shown in FIGS. 3 and 4, after the shaft 40 is passed through the operation lever 10 mounted in contact with the main body 20, the central portion of the protruding end of the shaft 40 is expanded with a conical punch or the like. The caulking process is performed so that the operation lever 10 is in close contact with the main body 20. And axis 4
The operation lever 10 makes a rotational movement with 0 as a fulcrum. In the embodiment shown in FIGS. 5 and 6, FIGS.
In the case where the shaft 40 having a screw at the tip is used instead of the shaft 40 in, the screw portion of the shaft 40 is screwed into the screw hole formed in the operation lever 10 to perform screw tightening.

[0003]

In the above-mentioned conventional example, the shaft 40 is required, and in the case of FIGS. 3 and 4, a special work of caulking is required, and FIGS.
In the case of 1), since the threading of the shaft portion is required, the number of processing steps is considerably large. Therefore, the present invention eliminates the need for the shaft 40, reduces the number of parts, and reduces the number of processing steps.

[0004]

A plate-shaped operating lever has a plate-shaped supporting portion 11 in which a T-shaped support piece 111 having a vertical portion 112 having a constant width is cut and raised, and a plate-shaped mounting lever for mounting is provided. Slit 2 into which the T-shaped support piece 111 can be inserted into the main body 2.
A fan-shaped through hole 21 having 2 at its end is formed, is in contact with the main body 2, and a through hole 31 and a slit 32 are formed substantially in the center of the through hole 21 and the slit 22 so that the projection surfaces thereof have substantially the same size. The curved plate-shaped springs 3 are positioned in the main body 2 such that the through holes and the slits are aligned with each other, and the head 113 of the vertical portion 112 of the T-shaped support piece 111 of the operation lever 1 is located between the base portion. The gist is that the main body 2 is inserted into the fan-shaped through hole 31 of the leaf spring 3 and is rotatably supported around the apex P of the fan-shaped through hole 21 as a fulcrum.

[0005]

As is apparent from the above means, the operation lever 1 has the T
Since the vertical portion 112 is fitted into the fan-shaped hole 21 of the main body 2 while the leaf spring 3 is being pressed by the head of the shaped support piece 111, the operating lever 1 receives the elasticity of the leaf spring 3. They can be brought into close contact with each other and smoothly rotate about the apex P of the fan-shaped hole 21.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Reference numeral 1 denotes a rotary operation lever. The operation lever 1 is made of a sheet metal bent in a crank shape at a slightly tip end side from an intermediate portion, and a tip end portion bent downward at a right angle further has a needle valve shaft (not shown). There is a slit 12 for engaging a pin or the like that is projected and attached to the portion, and a knob is inserted and fixed to the base end. Bearing part 11 located in front of the tip
A T-shaped support piece 111 is cut and raised at a substantially right angle. The T-shaped support piece 111 is composed of a head portion 113 whose tip side projects left and right by substantially the same length, and a vertical portion 112 whose root side has a constant width. The main body 2 that supports the operation lever 1 is made of sheet metal, and the vertical portion 112 is inserted and supported, and the rotation angle range of the operation lever 1 is regulated to approximately 90 degrees.
1 and a slit 22 through which the above-described head 113 is inserted at one end side is continuously formed outside the arc portion. Slits 23 for inserting leg pieces 33 of a leaf spring 3 described later are punched and formed at both ends of the fan-shaped through hole 21. Reference numeral 3 denotes a leaf spring curved in an arc shape. The leaf spring 3 has a fan-shaped through hole 31 having the same shape as the through hole 21 or slightly longer in the circumferential direction and a projected area substantially the same at the substantially central portion of the plate spring 3 and its end portion. A slit 32 having the same shape as the slit 22 or slightly longer in the circumferential direction is continuously formed in the same manner as described above. After assembling the operation lever 1 into the main body 2 with the leaf spring 3 slightly compressed, the through hole 31 and the slit 32 are inserted into the through hole 21 and the slit 22.
The projected shapes of and are substantially the same. Further, the through holes 23, 2 are provided at substantially central positions of both ends thereof.
The leg pieces 33, 33 to be fitted in the projection 3 are integrally projected.

Therefore, the leaf spring 3 is placed on the upper surface of the main body 2,
The leg pieces 33, 33 are fitted into the through holes 23, 23 by fitting the head pieces 113 of the support piece 111 from the lower side of the main body 2 of the operation lever 1 into the slits 22 of the main body 2 and the slits 3 of the leaf spring 3.
2 and then, the operation lever 1 is moved to the front side to draw the vertical portion 112 to a position where it enters the fan-shaped through holes 21 and 31, and then it is turned slightly to the left in FIGS. 1 and 2 to rotate the fan-shaped through hole. Show 21 and 31. Here, the leaf spring 3 is slightly pressed, that is, the leaf spring 3 and the main body 2 are sandwiched between the head 113 and the base of the operation lever 1 to compress the leaf spring 3 and reduce the degree of bending thereof. . In this state, the projected areas of the fan-shaped through holes 21, 31 and the slits 22, 32 are substantially the same. At the same time, by inserting a not-shown operated portion such as a needle valve mounting pin into the slit 12 which is the operating portion at the tip of the operating lever 1, and rotating the operating lever 1 to the left and right, the slit 12 which is the operating portion at the tip is inserted. The needle valve etc. can be operated to rotate the operated body. Furthermore,
The rotation angle of the operation lever 1 is regulated within the angular range of the fan-shaped through hole 21 by a stopper (not shown), and the vertical portion 112 of the support portion 111 is restricted from rotating to the slit 22 to prevent the vertical portion 112 from coming out. is doing.

The angle of the fan-shaped through hole 21 of the present invention is 360
Of course, a circular through-hole having a degree can be considered. In this case, the vertical portion 112 is moved in the left-right direction depending on the gap (t) between the outer diameter of the through hole 21 and the outer diameter of the vertical portion 112 of the support piece 111, so that the T-shaped support piece is moved. The deviation of the bearing point (rotation center point) of 111 becomes considerably large. The support point of the T-shaped support piece 111 is the apex P, and the deviation in this case is obviously large as compared with the case of the present invention in which there is almost no deviation.

As is clear from the above description, the operating lever receives a constant elastic force of the curved leaf spring and is in close contact with the surface of the main body 2 and is centered around the center point P (apex) of the fan-shaped through hole 21. It can rotate smoothly without any angle. The T-shaped support piece 111 of the operation lever described above is formed by punching by press working, and then cut and raised by press working, and the leaf spring 3 is bent at the same time when punching and the leg piece 33 is also formed. At the same time, it can be easily formed upright by pressing.

[0010]

As described above, according to the present invention, the number of parts can be reduced by eliminating the need for the conventional shaft for bearing. Further, the operation lever is formed, the leaf spring is formed, and the fan-shaped through hole 21 for supporting the main body 2 and the fan-shaped through hole 31 of the leaf spring 3 are formed.
Both punching and bending etc. can be easily done by press working, and since all are made of sheet metal, the material cost is low, and the large number of processing steps required for caulking, screw cutting, tapping can be reduced, An effective rotary operation lever with high positioning accuracy of the bearing point can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an exploded state of an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing an assembled state of the embodiment shown in FIG.

FIG. 3 is a view corresponding to FIG. 1 showing a conventional embodiment.

FIG. 4 is a schematic front view showing the assembled and assembled state of the embodiment shown in FIG.

FIG. 5 is a view corresponding to FIG. 3 showing a different embodiment of the related art.

FIG. 6 is a view corresponding to FIG. 4 showing a conventional different embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operation lever 2 Main body 3 Leaf spring 11 Support part 111 Support piece 112 Vertical part 113 Head part 21 Fan-shaped through hole 22 Slit 31 Fan-shaped through hole 32 Slit

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped operating lever 1 has a plate-shaped support portion 11 in which a T-shaped support piece 111 having a vertical portion 112 having a constant width is cut and raised, and is attached to a plate-shaped main body 2 for mounting. A fan-shaped through hole 21 having a slit 22 at an end thereof, through which the T-shaped support piece 111 can be inserted, is formed, is in contact with the main body 2, and the projection surfaces of the through hole 21 and the slit 22 have substantially the same size in the center thereof. A curved plate-shaped spring 3 having a through hole 31 and a slit 32 of the shape is fixed to the main body 2 by aligning the respective fan-shaped through holes and the slits and contacting both ends thereof. Head 1 of vertical portion 112 of T-shaped support piece 111
13 with the main body 2 sandwiched between the leaf spring 3 and the base.
Of the fan-shaped through hole 31 and rotatably supported around the apex P of the fan-shaped through hole 21 as a fulcrum.