JPH0422265Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to the structure of an indicating instrument that is equipped with an illumination bulb inside and can facilitate the replacement work of the illumination bulb. .

[Background of the idea]

For example, conventionally structured indicating instruments installed in automobiles include those shown in FIGS. 2 and 3. That is, reference numeral 1 denotes an instrument frame made of a resin material, and a printed circuit board 2 is fixed to the inside of this instrument frame 1 with mounting screws 3, and furthermore, on the back side of this printed circuit board 2, suitable Electronic components 4 are assembled. Further, on the front side of the printed circuit board 2, a liquid crystal display panel 5 for digitally displaying vehicle speed, a tachometer 6 for analog display, and a monitor liquid crystal display panel 7 for issuing various alarms are arranged. 8 is instrument frame 1
A transilluminated dial is fixed to the front surface of the dial by mounting screws 9, and 10 is a front cover attached to the front of the dial. Further, at appropriate locations on the printed circuit board 2, an illumination bulb 11 for transmitting illumination of the transilluminated dial 8, the liquid crystal display panel 7 for monitor, and the liquid crystal display panel 5 for digital display has its socket 12. However, the illumination bulb 11 attached to the printed circuit board 2 needs to be replaced in the event of a disconnection or the like. Therefore, this lighting bulb 1
1, a tool insertion hole 13 for inserting a tool (screwdriver, etc.) for replacing the lighting bulb is bored on the back of the instrument frame 1. A cap 14 is fitted to prevent dust from entering the inside of the meter. Reference numeral 15 denotes a boss portion attached to maintain a constant distance between the printed circuit board 2 and the inner surface of the instrument frame 1.

However, in an indicating instrument having such a structure, in order to replace the illumination bulb 11, the above-mentioned tool insertion hole 13 must be replaced.
For example, insert a screwdriver, rotate the socket 12 fitted to the printed circuit board 2, unfit the socket 12 from the printed circuit board 2, and then hook the socket 12 onto the tip of the screwdriver. Insert the instrument frame 1 from the tool insertion hole 13 while keeping it in place.
Some try to pull it out, but the locking force between the socket 12 and the tip of the screwdriver at this time is weak, so the lock between the bulb socket 12 and the tip of the screwdriver stops just before the bulb socket 12 is pulled out from the tool insertion hole 13. There are many problems in which the bulb socket 12 comes off and falls into the gap between the printed circuit board 2 and the instrument frame 1, and it is structurally difficult to remove the socket that wants to fall between the printed circuit board 2 and the instrument frame 1. It was hot.

[Purpose of invention]

The present invention has been developed by focusing on such conventional problems, and even if the light bulb socket 12 and the screwdriver are disengaged when the light bulb socket 12 is removed, the light bulb socket 12 is not connected to the printed circuit board. By improving the shape of the instrument frame 1 so that it does not fall between the instrument frame 1 and the instrument frame 1,
It is an object of the present invention to provide an indicating instrument that can solve the above problems.

[Example of idea]

The invention will be explained in detail below based on the embodiment shown in FIG. 1, and the same parts between the structure in this embodiment and the structure shown in the conventional example are given the same reference numerals as in the conventional example. A description of the same structural parts will be omitted.

That is, the instrument frame 1 in this embodiment has a short pipe 20 that protrudes from the edge of the tool insertion hole 13 formed in the instrument frame 1 toward the inner side of the instrument frame 1, that is, toward the printed circuit board 2. The short tube 20 is formed integrally with the frame 1, and the length of the short tube 20 is equal to the length of the boss portion 15, which serves as a spacer for keeping the distance between the instrument frame 1 and the printed circuit board 2 constant. This is what has been set.

Therefore, inside the instrument frame 1 according to this embodiment,
By fixing the printed circuit board 2 with the mounting screws 3, the tip edge of the short tube 20, which is integrated with the instrument frame 1, comes into contact with the back surface of the printed circuit board 2, and connects with the light bulb socket mounting part provided on the printed circuit board 2. During the
Because the structure is surrounded by the short tube 20, when inserting a tool (such as a screwdriver) into the tool insertion hole 13 and removing the light bulb socket 12 fitted to the printed circuit board 2, the printed circuit board 2 and Even if the light bulb socket 12 falls out from the tool between the instrument frame 1 and the tool, the light bulb socket 12 will be received within the short tube 20. Therefore, the light bulb socket 12 inside the short tube 20 should be pinched and taken out to the outside. There is an effect that can be easily achieved.

[Summary of the idea]

As described above, the present invention accommodates the printed circuit board 2 and the display member 5 or 7 located in front of the printed circuit board 2 in the instrument frame 1, and allows the lamp socket to pass through the through hole 13 provided in the instrument frame 1. In the indicating instrument, a lamp 11 is removably attached to the printed wiring board 2 via a tube 12, and the indicator 5 or 7 is illuminated with the light of the lamp 11. is provided in the instrument frame 1, and the inner end of the short tube 20 comes into contact with the front printed wiring board 2 to accommodate the lamp 11.

[Effect of idea]

Therefore, according to this indicator, since the space between the through hole 13 provided in the instrument frame 1 and the mounting portion of the lamp socket 12 mounted on the printed wiring board 2 is surrounded by the short pipe 20, this short Due to the action of the tube 20, even if the lamp socket 12 falls off from the removal tool when the lamp socket 12 is replaced, the lamp socket 12 will be received within the short tube 20, so that the lamp socket received within the short tube 20 will remain intact. 12 has the effect that it can be taken out more easily than the through hole 13.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of an indicating instrument according to the present invention, FIG. 2 is a partial front view of the indicating instrument, and FIG. 3 is a sectional view showing an example of a conventional structure taken along the - line. 20...Short tube.

Claims (1)

[Scope of utility model registration request] A printed wiring board 2 and a display member (5 or 7) located in front of the printed wiring board 2 are accommodated in the instrument frame 1, and a through hole 1 provided in the instrument frame 1 is provided.
In the indicator, the lamp 11 is detachably attached to the printed wiring board 2 via the lamp socket 12 passing through the through hole, and the indicator (5 or 7) is illuminated with the light of the lamp 11. 13
An indicating instrument characterized in that a short tube 20 connected to the indicator frame 1 is provided in the instrument frame 1, and the inner end of the short tube 20 abuts the front printed wiring board 2 to accommodate the lamp 11.