JPH0337202Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an electronic component in which a frame and a board are integrated using a mounting plate.

[Background of the idea]

7 and 8 show a conventional example of a rotary variable resistor, which is an example of an electronic component, and FIG. 7 is a perspective view,
FIG. 8 is a longitudinal sectional view of the main part.

In FIG. 7, 1 is a cylindrical frame made of zinc die-casting, 2 is a bearing molded integrally with the frame 1, 3 is a shaft rotatably supported by the bearing 2; A drive plate and a slider receiver (not shown) are attached, and a slider is attached to the slider receiver. Reference numeral 4 denotes a resistor board (substrate) attached to the frame 1, and a horseshoe-shaped resistor (not shown) is formed on one surface of the board 4. In addition, 5
are terminals at both ends of the resistor, and 6 is an intermediate terminal.
The shaft 3 constitutes a stopper that limits the rotation range of the shaft 3 by a protrusion provided on the drive plate and a convex portion provided on the inner circumferential surface of the frame 1. A slider attached to the slider receiver slides between both terminals 5, 5 of the resistor.

Reference numeral 7 designates a mounting plate for mounting the board 4 to the frame 1, and is composed of a bottom plate 7a and a pair of mounting arms 7b that are erected from the bottom plate 7a. Then, the board 4 is attached to the frame 1
To fix the board 4, first, place the board 4 on the open surface of the frame 1, and then temporarily fix it by caulking the mounting leg 1a at the tip of the frame 1. Next, attach the bottom plate 7a of the mounting plate 7 to the substrate 4.
By placing both mounting arms 7b upright along the side surfaces of the frame 1, and bending and locking the tips of the mounting arms 7b into the recesses 8 on the bottom of the frame 1, the board can be mounted on one surface. 4
is fixed to frame 1. However, the bottom plate 7a of the mounting plate 7 and both mounting arms 7b have the same width, and the mounting arms 7b
Even if a pressing force is applied to bend the tip of the frame so that it is located in the recess 8 on the bottom surface of the frame 1, when the pressing force is released, it returns to the direction of the arrow in FIG. As shown in FIG. 8, there are gaps between the sides of the board and between the bottom plate 7a and the board 4.
If the mounting of the board 4 to the frame 1 is incomplete, and if a rotational force is applied to the shaft 3 in the same direction beyond the stopper by mistake, the tip of the mounting arm 7b and the recess 8 of the frame 1 may Since the engagement is incomplete, the frame 1 rotates together with the shaft 3, resulting in damage to the variable resistor body.

[Purpose of invention]

The present invention aims to solve the above-mentioned conventional drawbacks, and its purpose is to provide an electronic component that allows easy and reliable attachment of the board to the frame and has a high stopper strength.

[Summary of the idea]

In order to achieve the above object, the present invention includes a frame forming a main body, a substrate attached to the frame,
A mounting plate having a bottom plate and a pair of mounting arms standing up from the bottom plate, the mounting plate being fitted into the frame via the substrate, and the tips of the mounting arms of the mounting plate being bent toward the frame, In these electronic components formed by integrating a frame body, a board, and a mounting plate, the mounting arm of the mounting plate is provided with a narrow neck portion and a wider flange portion than the neck portion at the distal end portion of the mounting arm, A first recess into which the neck fits and a second recess into which the collar fits are continuously provided in the frame, and a boundary between the first and second recesses is formed. The protrusion is characterized in that a guide surface is formed on the protrusion to guide the flange and whose height gradually decreases toward the center of the frame.

[Example of idea]

Figures 1 to 6 show embodiments of the present invention;
The figure is a perspective view of a rotary variable resistor which is an example of an electronic component implementing the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a plan view of the frame, and FIG. A sectional view, FIG. 5 is an enlarged view of the part B surrounded by the dotted line in FIG. 3, and FIGS. 6 a, b, and c are main part sectional views showing the process of attaching the mounting plate to the frame. Furthermore, Figure 7,
Components that are the same as those in the conventional example shown in FIG. 8 are given the same reference numerals and detailed explanations will be omitted.

In FIG. 2, reference numeral 9 denotes a mounting plate, which has a bottom plate 9a and a pair of mounting arms 9b erected from the bottom plate 9a.
A narrow neck 10 and a flange 11 wider than the neck 10 are provided at the tip of the mounting arm 9b. On the other hand, as shown in FIG. 2, the mounting arm 9b is attached to the bottom of the frame 1.
a first recess 12 into which the neck 10 of the first recess 12 fits;
A second recess 13 into which the collar 11 at the tip of the mounting arm 9b fits is provided continuously to the recess 12, and a protrusion 14 forming a boundary between the first and second recesses 12 and 13 is provided. is provided with a tapered portion 15 whose height decreases toward the center of the frame 1, and the tapered portion 15 is such that the flange 11 of the mounting arm 9b of the mounting plate 9 fits into the second recess 13 of the frame 1. It forms a guide surface when mating. Since the other points are the same as the structure of the conventional example, the explanation will be omitted here.

Next, the process of attaching the board 4 to the frame 1 using the attachment plate 9 will be explained.

First, as in the conventional example, the board 4 is placed on the open surface of the frame body 1, and then the mounting leg 1a at the tip of the frame body 1 is caulked to attach the board 4.
Temporarily fasten it to frame 1. Next, as shown in FIG. 6a, the bottom plate 9a of the mounting plate 9 is placed on the base plate 4, and both mounting arms 9b are placed on both sides of the frame 1. Next, as shown in FIG. 6b, the neck portion 10 of the mounting arm 9b is bent toward the center of the frame 1 and fitted into the first recess 12, and the collar 11 is then bent to the tapered portion 15 of the protruding portion 14.
The flange 11 is pressed toward the center of the frame 1 along the ridge 1, and the flange 11 is fitted into the second recess 13 as shown in FIG. 6c to complete the installation.

The embodiments of the present invention have the following effects.

(1) The mounting arm 9a of the mounting plate 9 is provided with a narrow neck 10 and is bent at the neck 10, so it can be easily bent with a small amount of force, thus improving workability. good.

(2) First and second recesses 12 and 13 on the bottom of the frame 1
A tapered part 15 is formed on the protruding part 14 that forms the boundary part of the frame body 1. The tapered part 15 serves as a guide surface when bending the collar 11 toward the center of the frame body 1. At this time, the mounting arm 9b is bent inward of the frame 1, and at this time, a tension force is applied to pull the mounting arm 9b toward the center of the frame 1. There is no gap between the base plate 1 and the bottom plate 9a of the mounting plate 9, and between the mounting arm 9b and the side surface of the frame 1.
is securely fixed to the frame 1.

(3) Even if a rotational force is applied to the shaft 3 in the same direction beyond the stopper by mistake and the frame 1 attempts to rotate, the ends of the first and second recesses 12 and 13 of the frame 1 will be attached to the mounting arm. Rotation of the frame 1 is suppressed by being locked to one end of the neck 10 and collar 11 of the variable resistor 9b, so that the variable resistor main body is not destroyed.

In the above embodiment, the protrusion 14 formed at the boundary between the first and second recesses 12 and 13 of the frame 1 is provided with a tapered portion 15 as a guide surface for the collar 11, but the present invention is not limited to this. Instead of a curved surface whose height gradually decreases toward the center of the frame 1.

[Effect of idea]

According to the present invention, a mounting plate having a bottom plate and a mounting arm erected from the bottom plate has a narrow neck portion and a wider flange portion at the tip of the mounting arm,
On the other hand, the frame is provided with a first recess into which the neck of the attachment arm fits, and a second recess into which the collar of the attachment arm is fitted, which is continuous with the first recess, and the first recess into which the collar of the attachment arm fits. , second
The protrusion that forms the boundary of the recess has a height that gradually decreases toward the center of the frame to form a guide surface that guides the flange, and the mounting plate is attached to the frame by the mounting arm. Since it is bent at the narrow neck, it can be easily bent with a small amount of force, resulting in good workability. In addition, the flange of the mounting arm is bent inward of the frame along the guide surface formed on the protrusion, and at this time, a tension force is applied to pull the mounting arm toward the center of the frame, so that it is not connected to the board. There are no gaps between the bottom plates of the mounting plate and between the mounting arms and the side surfaces of the frame, so the board is securely fixed to the frame. Furthermore, even if a rotational force is accidentally applied to the shaft in the same direction beyond the stopper, the ends of the first and second recesses will be locked to the neck of the mounting arm and one end of the collar, and the frame will remain intact. Rotation is suppressed, so the electronic component itself will not be destroyed, etc.
It has various effects.

[Brief explanation of the drawing]

Figures 1 to 6 show embodiments of the present invention;
The figure is a perspective view of a rotary variable resistor which is an example of an electronic component implementing the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a plan view of the frame, and FIG. A sectional view, FIG. 5 is an enlarged perspective view of part B surrounded by the dotted line in FIG. 3, FIGS. FIG. 8 shows a conventional example of a rotary variable resistor which is an example of an electronic component, FIG. 7 is a perspective view, and FIG. 8 is a longitudinal sectional view of a main part. 1...Frame body, 4...Resistor board (substrate), 9...
...Mounting plate, 9a...Bottom plate, 9b...Mounting arm, 10
... neck, 11 ... tsuba, 12 ... first recess, 1
3...Second recessed part, 14...Protrusion part, 15...Tapered part (guide surface).

Claims (1)

[Scope of utility model registration request] A frame body forming a main body, a substrate attached to the frame body, a mounting plate having a bottom plate and a pair of mounting arms rising from the bottom plate, and the mounting plate is fitted into the frame body via the substrate. In an electronic component formed by integrating the frame, the board, and the mounting plate by bending the tip of the mounting arm of the mounting plate toward the frame, a narrow neck is formed at the tip of the mounting arm of the mounting plate. and a flange having a wider width than the neck, and a first recess into which the flange fits and a second recess into which the flange fits are connected to the frame. In addition, a guide surface is formed on a protrusion forming a boundary between the first and second recesses, the guide surface guiding the flange and gradually decreasing in height toward the center of the frame. Electronic components featuring: