JPH0649876U - Rotary operation lever - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rotary operation lever that does not require a shaft for support, and that the operation lever and related members for support are all made of sheet metal members. [Structure] A T-shaped support piece 111 formed by cutting and raising the operation lever 1 in a fan-shaped through hole 21 for support formed in the main body 2.
And a curved leaf spring 3 having a fan-shaped through hole 31 whose projected area is substantially the same as that of the fan-shaped through hole 21 is interposed between the head 112 and the base of the support piece 111 of the operation lever 1 and the main body. The operation lever 1 is supported by sandwiching the operation lever 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This is a rotary operation type operating lever that opens and closes a valve, and relates to a sheet metal product.

[0002]

[Prior art]

 A conventional example of the 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 by a conical punch or the like. The caulking process is performed so that the operating lever 10 comes into close contact with the main body 20. Then, the operation lever 10 is rotated about the shaft 40 as a fulcrum. In the embodiment shown in FIGS. 5 and 6, the shaft 40 having a screw at the front end is used instead of the shaft 40 in FIGS. 3 and 4, and the shaft is provided in the screw hole formed in the operation lever 10. The screw portion of 40 is screwed in to tighten the screw.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional example, the shaft 40 is required. In the cases of FIGS. 3 and 4, special work of caulking is required, and in the cases of FIGS. 5 and 6, screwing of the shaft portion is required. Since it is necessary, these man-hours for processing are 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]

[Means for Solving the Problems]

 The plate-shaped operation lever 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 the T-shaped support piece 111 is attached to the plate-shaped main body 2 for mounting. A fan-shaped through hole 21 having a slit 22 at the end is formed, and is in contact with the main body 2, and the projection planes of the through hole 21 and the slit 22 are approximately the same size in the center thereof. A curved plate-shaped spring 3 formed with a slit 31 and a slit 32 is positioned in the main body 2 with the through holes and the slits aligned with each other, and the head of the vertical portion 112 of the T-shaped support piece 111 of the operating lever 1 is positioned. 113 is inserted into the fan-shaped through hole 31 of the leaf spring 3 in a state that the main body 2 is sandwiched between it and the base portion, and is rotatably supported with the vicinity of the apex P of the fan-shaped through hole 21 as a fulcrum. Is.

[0005]

[Action]

 As is clear from the above means, since the vertical portion 112 of the operating lever 1 is inserted into the fan-shaped hole 21 of the main body 2 while the leaf spring 3 is being pressed by the head of the T-shaped support piece 111, the operating lever 1 1 is brought into close contact with the elastic force of the leaf spring 3 and can smoothly rotate about the apex P of the fan-shaped hole 21.

[0006]

【Example】

 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 further bent downward at a right angle has a shaft of a needle valve (not shown). It has 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. A T-shaped support piece 111 is cut and raised at a substantially right angle on the support portion 11 located in front of the tip. The T-shaped support piece 111 is composed of a head portion 113 having a tip side protruding left and right by substantially the same length and a vertical portion 112 having a constant width on the base side. The main body 2 supporting the operation lever 1 is made of sheet metal, and the vertical portion 112 described above is inserted and supported therein, and the fan-shaped through hole 21 for regulating the rotation angle range of the operation lever 1 to approximately 90 degrees and the above-mentioned one end portion on the side. The slit 22 for inserting the head 113 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 above through hole 21 or slightly longer in the circumferential direction and having a substantially the same projected area at the substantially central portion of the plate spring 3 and its end portion. Further, 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. Then, after the leaf spring 3 is assembled to the main body 2 in a state of being slightly compressed when the operation lever 1 is assembled, the through holes 31 and the slits 32 have substantially the same projected shape as the through holes 21 and the slits 22. The size and shape. Further, the leg pieces 33, 33 fitted into the above-mentioned through holes 23, 23 are integrally projected at substantially central positions of both ends thereof.

Therefore, the leaf spring 3 is placed on the upper surface of the main body 2, and the leg pieces 33, 33 are fitted into the through holes 23, 23 so that they fit into each other. After inserting the portion 113 into the slit 22 of the main body 2 and the slit 32 of the leaf spring 3, the operation lever 1 is moved to the front side to draw the vertical portion 112 to the position where it enters the fan-shaped through holes 21, 31. After that, it is turned slightly to the left in FIGS. 1 and 2 to face the fan-shaped through holes 21 and 31. Here, the leaf spring 3 is slightly pressed down, that is, the leaf spring 3 and the main body 2 are sandwiched between the head portion 113 and the base portion of the operation lever 1, and the leaf spring 3 is compressed to reduce the bending degree. To do. In that 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, a not-shown actuated portion such as a pin for mounting a needle valve is fitted into the slit 12 which is the operating portion at the tip of the operating lever 1, and the operating lever 1 is rotated to the left and right to cause the slit 12 which is the operating portion at the tip. The needle valve etc. can be operated to rotate the operated body. Further, the rotation angle of the operating 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. Preventing you from getting out.

It should be noted that the fan-shaped through hole 21 of the present invention may be a circular through hole having an angle of 360 degrees. 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 is supported. The shift of the support point (rotation center point) of the piece 111 becomes considerably large. The support point of the T-shaped support piece 111 is the apex P, and the displacement in this case is obviously large as compared with the case of the present invention in which there is almost no displacement.

As is clear from the above description, the operation lever receives a constant elastic force of the curved leaf spring and is in close contact with the surface of the main body 2 with the vicinity of the center point P (apex) of the fan-shaped through hole 21 as the center. It is possible to rotate smoothly without a predetermined 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]

[Effect of device]

 As described above, according to the present invention, it is possible to reduce the number of parts by eliminating the need for the conventional supporting shaft. Also, the forming of the operating lever, the forming of the leaf spring, the fan-shaped through hole 21 for supporting the main body 2, the fan-shaped through hole 31 of the plate spring 3, and the like can be easily performed by press working. Since all of them are made of sheet metal, the material cost is low, and the large processing man-hours required for caulking, thread cutting, and tapping are reduced, and an effective rotary operation lever with high positioning accuracy of the bearing point is obtained. To be

[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 formed in 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.