JPH0222911Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rotary electronic component such as a rotary switch or a rotary volume in which a wafer is attached to a frame having a substantially U-shaped cross section.

[Conventional technology]

FIG. 5 is a diagram showing the structure of a conventional rotary electronic component. This rotary electronic component has engagement protrusions 9 on the left and right side portions of a wafer 19 equipped with a rotary plate 1, such as a rotary switch or a rotary volume.
(In the figure, one of the engaging convex portions is omitted from illustration.) Each of the engaging convex portions 9 is formed in a corresponding side wall portion of the frame 20 having a substantially U-shaped cross section. The wafer 19 is fixed to the frame 20 by inserting the wafer 19 into the frame 20 and tightening the engaging protrusion with a pair of claws 15 formed opposite to each other near the entrance of the notch 14. And rotating plate 1 of wafer 19
A shaft (not shown) is inserted through the shaft, and the rotary plate 1 is operated by the rotational movement of this shaft, so that the desired rotary electronic component can be operated.

[Problem that the invention attempts to solve]

In the conventional rotary electronic component described above, the engaging protrusion 9 was supported by the claw 15, but since the upper part of the wafer was not supported by the frame 20, accuracy was required for positioning the wafer. There was also the problem that the wafer was prone to wobbling due to the rotational movement of the shaft. If there is such positioning inaccuracy and backlash, the axes of the respective wafers will not match, especially when a plurality of wafers 19 are arranged in the frame 20 and the rotary plate is rotated in conjunction with one axis. Due to this, contact misalignment,
Problems such as unstable contact and inability to rotate smoothly have occurred, leading to deterioration of characteristics over the long term.

Therefore, the technical problem of this invention is to achieve accurate positioning of a wafer in a rotating electronic component and to prevent play.

[Means for solving problems]

In order to solve the above-mentioned problems, the rotary electronic component of the present invention is provided with at least one mating convex portion on the upper surface of the wafer which is rotatably equipped with a rotary plate therein, and a cross section for mounting the wafer. In the approximately U-shaped frame, a recess or hole into which the above-mentioned convex portion fits is provided in the ceiling portion that receives the upper surface of the wafer, and engaging convex portions are provided on the left and right sides of the wafer, respectively. A notch is provided in the extending side wall portions to guide the engaging convex portion, and a portion near the entrance of the notch is formed so as to be bendable toward the notch side, so that each engaging convex portion of the wafer is connected to the corresponding portion of the frame. The notch is engaged at the bent portion of the entrance portion of the notch and supported by the bent portion.

〔Example〕

1 to 4 are diagrams showing one embodiment of the present invention, and are diagrams showing an example in which the wafer is a rotary switch.

Describing this wafer based on FIG. 2, the rotary plate 1 has a conductive portion 1b selectively formed on at least one surface of a disk equiaxially fixed to a shaft portion 1a having an oval-shaped through hole. It consists of At least one of the molded product 2 and molded product 3 surrounding the rotary plate 1 is provided with a plurality of contacts 4 for contacting the conductive portion 1b of the rotary plate 1. Engagement protrusions 5 are formed on the left and right side surfaces of the molded product 2 and the molded product 3, respectively.
An engaging protrusion 7 having a tapered protrusion 6 is formed on the upper surface. The wafer 12 has a rotating plate 1 between the bearing part 8a of the molded product 2 and the bearing part 8b of the molded product 3.
The rotating plate 1 is rotatably held by engaging the plurality of opposing protrusions 9 and recesses 10 of the molded products 2 and 3.

On the other hand, the frame 13 for attaching this wafer 12 is
As shown in FIG. 3, the above-mentioned convex portion 7 has a substantially U-shaped cross section and is located on the ceiling portion that receives the upper surface of the wafer 12.
A hole 18 is formed into which the holder is fitted. Note that instead of this hole 18, a recess into which the convex portion 7 is engaged is provided in the frame 13.
It may also be installed on the ceiling. Furthermore, a notch 14 for guiding the engaging protrusion 5 is provided in both side wall portions extending from the ceiling of the frame 13, and a portion near the entrance of the notch 14 is provided with a claw 15 that can be bent toward the notch 14 side.

The engagement convex portions 5 and 7 of the wafer 12 configured as described above are connected to the engagement hole 18 and the notch 1 of the frame 13, respectively.
The wafer 12 is fixed to the frame 13 by engaging the claw 15 on the entrance side of the notch 14 and then bending and tightening the claw 15 on the entrance side of the notch 14 to the notch 14 side. During the tightening, the wafer 12 is strongly pressed upward until the upper surface of the engagement protrusion 5 hits the inner part 14a of the notch 14, and at the same time, the engagement protrusion 7 engages with the tapered part of the tapered protrusion 6. Hole 1
It is inserted into the engagement hole 18 while strongly pressing the edge of 8, and is fitted and fixed. As a result, the wafer 12 is fixed to the frame 13. This state is the first
As shown in the figure.

Thereafter, as shown in FIG. 4, a shaft 22 is passed through the center of the wafer 12, and other desired parts are assembled, thereby producing a rotary electronic part.

[Effect of idea]

The present invention has the above-mentioned structure, and is a rotating electronic component supported by at least a three-point support structure using a wafer as a frame and convex portions formed on the top surface and both left and right sides of the wafer. Positioning can be performed accurately, the wafer can be prevented from wobbling due to the rotation of the shaft attached to the rotating plate of the wafer, and the desired function of the rotary electronic component can be obtained.

[Brief explanation of the drawing]

1 to 4 are views showing one embodiment of the present invention, and FIG. 1 is a perspective view showing a rotating electronic component;
Figure 2 is an exploded view of the wafer, Figure 3 is a perspective view of the wafer before it is assembled into a frame, Figure 4 is a perspective view of an example of a product implementing the present invention, and Figure 5 is a conventional example. FIG. 5... Engaging convex portion, 7... Fitting convex portion, 12...
Wafer, 13...Frame, 14...Notch, 15...
Claw, 18...engaging hole.

Claims (1)

[Scope of utility model registration request] At least one fitting convex portion is provided on the upper surface of the wafer which is rotatably equipped with a rotating plate therein, and the aforementioned convex portion is provided on the ceiling portion of the wafer mounting frame having a substantially U-shaped cross section for receiving the upper surface of the wafer. A recess or hole for fitting is provided, and an engaging protrusion is provided on each of the left and right side surfaces of the wafer, and a notch for guiding the engaging protrusion is provided in both side wall portions extending from the ceiling of the frame, and the notch is provided. A portion near the entrance of the notch is formed so that it can be bent toward the notch side, and each engaging convex portion of the wafer is engaged with the corresponding portion of the frame and supported by the bent portion of the entrance portion of the notch. A rotating electronic component characterized by: