JPH086341Y2 - Knob mounting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a knob attachment mechanism suitable for use as, for example, a knob for turning on / off a power supply of a transistor radio.

[Prior Art] FIGS. 7 to 13 show an example of a knob mounting mechanism, for example, a mechanism for an on / off switch of a power source of a transistor radio.

 First, the configuration will be described.

In the figure, reference numeral 1 is a box-shaped cabinet, and a substantially rectangular notch 1a is provided at a corner of the cabinet 1. On both sides of the cutout 1a, a pair of guide pieces 1b, 1b having a substantially rectangular cross section are provided on the back surface of the cabinet 1 in the longitudinal direction.
It is projected over a (see FIGS. 7 and 8).

Reference numeral 2 is a printed circuit board fixed to a chassis (not shown). As shown in FIG. 9, a pair of substantially U-shaped conductive patterns 2a and 2b are formed on the printed circuit board 2.

Reference numeral 3 denotes a contact part for connecting the conductive patterns 2a and 2b to each other, which is arranged on the printed circuit board 2 with only one end (left side in the drawing) being positioned, although not shown.

The contact part 3 is a base 3a that contacts the printed circuit board 2.
And a thin and hollow truncated cone type compression portion 3b connected to the base 3a are integrally molded, and are formed of an elastic material such as rubber. Then, the side wall of the compression portion 3b is easily deformed by applying a constant pressure and restores the original shape when the pressure is removed.

The top portion 3c of the compression portion 3b is flat, and a circular conductive rubber sheet 3d is attached to the hollow side of the top portion 3c (see FIG. 12). The compression section 3b is arranged at a position close to the corner of the cabinet 1.

Reference numeral 4 denotes a slide knob that fits into the notch 1a of the cabinet 1. The slide knob 4 serves to bring the conductive rubber sheet 3d of the contact part 3 into contact with the conductive patterns 2a and 2b of the printed circuit board 2. The slide knob 4 has a substantially L-shaped cross section.
The operation surface 4a of the mold, the pair of slide pieces 4b, 4b, and the substantially rectangular plate-shaped pressing piece 4c are integrally formed of hard synthetic resin, for example, plastic.

The outer shape of the operation surface 4a is substantially the same as the shape of the cutout 1a of the cabinet 1.

The slide piece 4b, as shown in FIG. 7 and FIG.
It has a hook portion 4d and engages with the guide piece 1b of the cabinet 1. The slide piece 4b is set so as to be slightly tilted to the left and right (up and down in FIGS. 8 and 11) about the joint with the operation surface 4a as a fulcrum.

The pressing piece 4c is formed by cutting the slide knob 4 into a notch in the cabinet 1.
It is of a size that substantially covers the compression portion 3b of the contact part 3 when fitted in the 1a.

Next, a procedure for attaching the slide knob 4 to the cabinet 1 will be described.

First, as shown in FIGS. 7 and 8, the slide knob 4 is gripped in a state of facing the notch 1a of the cabinet 1.

Then, the pressing piece 4c of the slide knob 4 is inserted so as not to come into pressure contact with the compression portion 3b of the contact part 3, and the hook portion 4d of the slide piece 4b and the side wall of the guide piece 1b are brought into contact with each other.

Next, when the slide knob 4 is pressed to the cabinet 1 side, the slide piece 4b is pressed against the guide piece 1b and the operation surface 4a is pressed.
Inclining to the side of the pressing piece 4c with the joint with and as a fulcrum.

Further, when the slide knob 4 is continuously pressed, the hook portion 4d of the slide piece 4b is locked to the guide piece 1b as shown in FIG. 11, and the slide piece 4b is restored to the original state.

As a result, the slide knob 4 is held in a state of being locked to the cabinet 1.

Then, in this state, as shown in FIG. 10, the pressing piece 4c
The upper surface of is close to the back surface of the cabinet 1, and the pressing piece 4c covers the upper side of the compression portion 3b.

 Next, the operation will be described.

When the power switch of the transistor radio is turned on, the user slides the slide knob 4 downward while pressing the operation surface 4a of the slide knob 4.

In this case, the slide knob 4 slides along the longitudinal direction of the guide pieces 1b, 1b in a state where the hook portions 4d, 4d of the sliver pieces 4b, 4b and the guide pieces 1b, 1b of the cabinet 1 are in contact with each other.

With this slide operation, the pressing piece 4c presses the compression portion 3b of the contact point component 3, and the top portion 3c is sequentially compressed.

Then, as shown in FIG. 13, when the slide knob 4 is slid downward until the conductive rubber sheet 3d comes into contact with the printed circuit board 2, the conductive rubber sheet 3d forms a pair of conductive patterns.
It comes into contact with 2a and 2b (see FIG. 9).

This allows one conductive pattern 2a and another conductive pattern
2b is connected via a conductive rubber sheet 3d to close a switch circuit (not shown).

As a result, the power switch of the transistor radio can be turned on.

Then, when the user slides the slide knob 4 upward, the compression portion 3b of the contact point component 3 is restored to the original state (state of FIG. 10) by the elasticity of the rubber.

Note that the power switch of the transistor radio is turned off from on by repeating the above operation.

[Problems to be Solved by the Invention] By the way, as described above, since only one end of the base 3a of the contact part 3 is engaged with the printed circuit board 2, as shown in FIG. The compressed portion 3b at the other end edge (right end edge in the drawing) of the above may rise above the printed circuit board 2.

In such a case, when the slide knob 4 is fitted into the notch 1a of the cabinet 1, the tip of the pressing piece 4c of the slide knob 4 presses the side wall of the compression portion 3b of the contact component 3 while hooking it.

When pressed in this state, as shown in FIG. 15,
The compression part 3b is attached while being lifted and deformed.

Therefore, even if the user slides the slide knob 4, the conductive rubber sheet 3d does not come into contact with the conductive patterns 2a and 2b due to a malfunction of the contact part 3, so that the power switch cannot be turned on.

That is, if the compression portion 3b is lifted up to the position of the tip of the pressing piece 4c, it may cause a mounting failure of the contact point component 3.

Therefore, an object of the present invention is to always be able to correctly attach the knob for pressing the top of the contact part to the cabinet.

[Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, a knob for pressing the top part of a stretchable contact part arranged on a substrate with a pressing piece is provided. In the mechanism that attaches to the cabinet from the direction orthogonal to the expansion and contraction direction, the cabinet is provided with a rib for arranging it at a predetermined position by pressing the top of the contact part toward the substrate side, and the rib on the pressing piece of the knob. A corresponding relief portion is provided.

[Operation] According to the above configuration, since the rib 5 is provided at a portion corresponding to the top portion 3c of the contact component 3, the contact component 3 is mounted on the substrate 2
When it is more raised, the rib 5 presses the top portion 3c of the contact component 3 toward the substrate 2. As a result, the top portion 3c of the contact point component 3 is always in a fixed position, and the contact point component 3 is in an appropriate position.

Therefore, when the knob 4 is attached, the member 4c that presses the contact point component 3 can be correctly attached without pressing the contact point component 3.

As a result, the attachment failure of the contact component 3 is eliminated, and the malfunction of the contact component 3 is eliminated.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

1 to 6, parts corresponding to those in FIGS. 7 to 13 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the cabinet 1, a plate-like rib 5 is provided at a portion corresponding to the center of the top portion 3c of the contact point component 3 so as to project along the insertion direction of the slide knob 4.

The rib 5 has such a height that it abuts on the top portion 3c of the contact point component 3 in a normal state, and has a function of pressing the compression portion 3b toward the printed circuit board 2 side when the compression portion 3b is lifted above the printed circuit board 2. That is, the rib 5 brings the other end (the right end in the drawing) of the base 3a of the contact part 3 into contact with the printed circuit board 2 to make the position of the contact part 3 proper.

On the other hand, the pressing piece 4c of the slide knob 4 is provided with a clearance 6 so that the rib 5 does not collide with the pressing piece 4c when the slide knob 4 is fitted into the notch 1a of the cabinet 1. That is, as shown in FIGS. 2 and 4, the clearance 6 is wider than the rib 5 and has a depth that does not collide with the rib 5 after fitting.

In this example, since the rib 5 is provided so as to project to correspond to the top 3c of the contact part 3, the rib 5 has the top 3c of the contact part 3.
, And the positional state of the contact point component 3 is always maintained in an appropriate state (see FIGS. 1 to 5).

Then, in this state, slide the slide knob 4 into the cabinet 1
When it is fitted into the notch 1a, the escape 6 of the pressing piece 4c is fitted into the rib 5, so that the slide knob 4 is guided along the rib 5.

Further, the procedure and operation of attaching the other slide knobs 4 to the cabinet 1 are the same as those of the conventional one (see FIGS. 1 to 6).

According to this example, the compression part 3b of the contact part 3 can be prevented from floating above the printed circuit board 2, so that the compression part 3b of the contact part 3 is deformed by being hooked on the tip of the pressing piece 4c of the slide knob 4. It is not installed in the state.

That is, when the slide knob 4 is mounted, the contact point component 3 is always held in an appropriate state as shown in FIGS. Therefore, according to this example, a malfunction due to a mounting defect of the contact part 3 is eliminated, and the function as a contact can be sufficiently exerted.

Further, according to this example, the fitting position of the rib 5 and the escape 6 of the slide knob 4 is determined from the beginning of the insertion of the slide knob 4, and the rib 5 guides the slide knob 4 in the insertion direction. When the slide knob 4 is attached to the cabinet 1, the slide knob 4 can be accurately and easily moved along the rib 5.

Although the rib 5 is plate-shaped in the above-described embodiment, the shape is not limited to this, and the length of the rib 5 is not limited to this. The point is that the rib 5 has a height that abuts on the top portion 3c of the contact part 3 in the normal state, and the rib 5 can be similarly applied as long as the position state of the contact part 3 can be properly maintained.

Moreover, when the shape of the rib 5 is changed, the shape of the pressing piece 4c of the slide knob 4 is naturally changed to the shape corresponding to the shape of the rib 5.

Further, in the above-mentioned embodiment, the example is used for the on / off switch of the power supply of the transistor radio, but it is needless to say that it can be applied to a portion using similar contact parts.

[Effects of the Invention] As described above, according to the present invention, the rib is provided at the portion corresponding to the top of the contact component, so that when the contact component is lifted, the top of the contact component can be pressed toward the board. As a result, the contact component can always be held in an appropriate state, malfunctions due to improper mounting of the contact component can be eliminated, and the function as a contact can be sufficiently exerted.

[Brief description of drawings]

1 to 6 are views showing an embodiment of the present invention, and FIGS. 7 to 15 are views showing a conventional example. 1 …… Cabinet 2 …… Printed circuit board 3 …… Contact part 3b …… Compression part 3c …… Top part 3d …… Conductive rubber sheet 4 …… Slide knob 4c …… Pressing piece 5 …… Rib 6 …… Escape

Claims (1)

[Scope of utility model registration request] 1. A mechanism for attaching a knob for pressing the top of a telescopic contact part arranged on a substrate with a pressing piece to a cabinet from a direction orthogonal to the expanding and contracting direction of the contact part. The cabinet is provided with a rib for arranging at a predetermined position by pressing the top of the contact part to the substrate side, and the pressing piece of the knob is provided with a relief portion corresponding to the rib. A mechanism for attaching the knob.