JPS6029093Y2 - Display device in audio equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a display device in an audio device such as a tape recorder.

Conventionally, a level motor using a fluorescent display tube and a display element indicating an operating mode are mounted on a printed circuit board and fixed to a chassis as one display block.

On the other hand, the front panel placed in front of the display block is fixed to the chassis independently of the display block, so there may be differences between the front panel and the display block due to dimensional errors between the parts or the mounting position during installation. Therefore, each display element of the display block may be shifted from the transparent portion of the front panel.

Conventionally, the mounting of the board to the chassis and the front panel to the chassis had to be done while being careful not to cause any misalignment, which caused problems in terms of workability, and also caused problems in assembly. The number of work processes has also increased, including the need for subsequent adjustment work.

This idea was developed in consideration of Narukami's point of view, and its purpose was to temporarily fix the board on which the display element was fixed to the chassis so that it could be moved, and also to attach the front panel to the chassis, sometimes from the front. Since the guide protrusion of the panel is fitted into the guide hole of the board, the position of the front panel and the board is accurately determined, and therefore the display device for audio equipment is positioned at a predetermined location on the front panel. is to provide.

Next, an embodiment of this invention will be described with reference to the drawings.

Although the illustration shows only the main parts of a tape recorder, the present invention is not limited to tape recorders.

1 is a chassis, 2 is a printed circuit board, and 3 is a level display element 3a such as a fluorescent display tube mounted on the printed circuit board 2.
A display element group consisting of a display element 3b for displaying information and operation mode, 4 is a rubber bush, and is inserted into the large diameter hole 2a of the substrate 2.
placed on the back of the

5 is a stepped screw with a small diameter threaded part at the tip.
The screw portion is screwed and fixed into the screw hole 1a of the chassis 1 via the large diameter hole 2a of the board 2 and the bush 4.

Further, since the large diameter hole 2a of the board 2 is formed to be larger than the diameter of the unthreaded part of the stepped screw 5, the board 2 is pressed toward the surface side by the elasticity of the bushing 4, and the large diameter hole 2a is It is possible to move until it touches the part.

That is, the board 2 is temporarily fixed to the chassis 1.

Note that the chassis 1 has a lead wire from the board 2 (not shown).
A hole is formed to lead out the .

Reference numeral 6 designates a front panel attached to the chassis 1, which has a window 6a through which the display element 3 faces, and two guide protrusions 6b protruding from a line on the back side of the porthole 6a.

This guide protrusion 6b is fitted into a guide hole 2b formed in the substrate 2 when the front panel 6 is attached to the chassis 1.

Since the diameter of the guide hole 2b substantially matches the diameter of the guide protrusion 6b, the board 2 is positioned with respect to the front panel 6 by fitting the guide protrusion 6b into the guide hole 2b.

Reference numeral 7 designates a display panel that is screwed to a predetermined position with respect to the front panel 6 with screws 8, and the display element 3a
, 3b is a transparent portion 7a, and display characters 7b are drawn on or near the transparent portion 7a by means such as printing.

The size of the transparent portion 7a is smaller than the area of each display element 3a, 3b.

Therefore, even if there is a slight misalignment between the front panel 6 and the display panel 7, the display surface of the display elements 3a*3b
It does not protrude beyond a.

Based on the above structure, first, the board 2 is temporarily fixed to the chassis 1 via the bushes 4 with the stepped screws 5, and then the front panel 6 is fixed to the chassis 1, and the guide projections 6b are fitted into the guide holes 2b. Therefore, the positioning of the board 2 with respect to the front panel 6 is performed accurately, and the front panel 6
Since the board 2 is pressed toward the chassis 1, the board 2 is elastically fixed to the chassis 1.

At this time, the display element group 3 is projected from the window 6a of the front panel 6.

Next, when the display panel is fixed to the front panel 6, the elastically protruding display element group 3 comes into contact with the back surface of the display panel 7, and further presses the board 2 toward the chassis 1, so that the board 2 and the chassis 1 is securely fixed without any distortion.

Further, since there is no gap between the display element group 3 and the display panel 7, the display on the display element group 3 is clearly performed.

Furthermore, the area of the transparent portion 7a of the display panel 7 is the area of the display element 3.
Since the display area of the display elements 3a and 3b is smaller than that of the display elements 3a and 3b, even if there is a misalignment between the front panel 6 and the display panel 7, the display elements 3a and 3b will not protrude beyond the transparent portion 7a.

In the above embodiment, the board 2 is attached to the chassis via the rubber bush 4, but this may be an elastic body such as a spring.

Since this invention is as described above, it is possible to correct the conventional drawbacks and achieve the desired purpose.

[Brief explanation of drawings]

The figures show an embodiment of the display device in a tape recorder according to this invention, in which Fig. 1 is an exploded perspective view of the main parts, Fig. 2 is a front view of the assembled state excluding the display panel, and Fig. 3 is the same as above. A cross-sectional view taken along the line ■--■, and FIG. 4 is a front view of only the display portion. 1... Chassis, 2... Board, 2b.
...Guide hole, 3a, 3b...Display element, 6...Front panel, 6b...Guide protrusion, 7...Display panel, 7a...Transparent part.

Claims (1)

[Scope of utility model registration request] A board on which various display elements are attached is movably temporarily fixed to the chassis, and at least two guide holes are formed in the board, and a board is fitted into the guide holes on the back side of the front panel to be attached to the chassis. A display in an audio device, characterized in that a guide protrusion is formed, and when the front panel is attached to a chassis, the guide protrusion is fitted into a guide hole, and the board is fixed at a predetermined position with respect to the front panel. Device.