JPH0247455Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an indicating instrument, and particularly to an operating shaft structure in an indicating instrument.

[Conventional technology]

For example, speedometers with return-to-zero accumulators, such as those used in automobiles, are equipped with a return-to-zero device that allows the driver to reset the accumulator to zero at any time. An operating shaft for this purpose is provided passing through the display panel, transparent glass, and front panel.

[Problem that the invention attempts to solve]

In the above-mentioned conventional technology, when the irradiation light of the illumination lamp arranged below the display board leaks through the through hole of the operation shaft provided in the display board and unintentionally illuminates the area around the operation shaft, This may cause other inconveniences.

The object of this invention is to provide an indicator that can prevent the area around the operating shaft from being illuminated.

[Means for solving problems]

In the present invention, a light guide made of a synthetic resin having translucency is disposed above the instrument body of an indicating instrument, a display plate is disposed on the surface of this light guide, and The operating shaft is inserted through a through hole provided in the light guide and the display board and taken out,
An elastic member accommodating portion for preventing light leakage is formed at the periphery of one or both of the through-holes on the surface where the light guide and the display plate overlap each other, and a protrusion for locking the elastic member is provided at an appropriate position on the inner circumferential wall surface of this accommodating portion. The elastic member can be attached through a normal assembly process, and the elastic member does not move in a way that would cause problems, such as when the operating shaft slides.

〔Example〕

Next, one embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in Figures 1 to 3, a synthetic resin light guide with good translucency and a translucent synthetic resin display board 2 with scales, letters, etc. on the surface side are superimposed for display. A substrate 3 is formed and a through hole 4 is formed in the display substrate 3, and the display substrate 3 is fixed to the upper part of the instrument body 5 with screws 6 or the like. Moreover, the light guide 1
A storage part 7 is formed by a recess at the periphery of the through hole 4 on one or both of the surfaces 1a and 2a where the display board 2 overlaps with each other, and a projection 8 is formed by protruding at a suitable position on the inner peripheral wall surface of this storage part 7. are doing. Further, an elastic member 9 for preventing light leakage, which is made of sponge, rubber, vinyl chloride, etc., and has an insertion hole 9a smaller in diameter than the through hole 4 is housed in the storage portion 7. In that case, the third
As shown in Figure A, there are protrusions 8 on both the light guide 1 and the display board 2.
or, as shown in FIG. 3B, the housing section 7 is formed on both the light guide 1 and the display board 2, and the projection 8 is provided only on the housing section 7 of the display board 2. , or as shown in FIG. 3C, the storage part 7 is formed on both the light guide 1 and the display board 2, and the protrusion 8 is provided only in the storage part 7 of the light guide 1, or as shown in FIG. 3D. The light guide 1 has a storage part 7 and the display board 2 has a projection 8, or the light guide 1 has a projection 8 and the display board 2 has a storage part 7 as shown in FIG. 3E. The combination structure of the storage part 7 and the protrusion 8 can be selected as appropriate. Note that 10 is an operating shaft that is inserted through and taken out from the insertion hole 9a.

FIG. 4 shows a speedometer with a return-to-zero totalizer equipped with the operating axis structure of this invention, in which a display board 3 is formed by superimposing a display board 2 on the surface side of a light guide 1, and this display board 3 A through hole 4 is bored at an appropriate location, and a storage section 7 is formed on the mutually overlapping surfaces of the light guide 1 and the display panel 2 located at the periphery of the through hole 4, and the inner periphery of this storage section 7 is A protrusion 8 is formed protruding from a suitable position on the wall surface, and an elastic member 9 for preventing light leakage having an insertion hole 9a is housed in the housing part 7.

The meter body 5 is composed of a speedometer having a pointer 11, a total odometer 12, and a return-to-zero meter 13. A bracket 15 is fixed to the meter body 5 with screws 14, and the bracket 15 has the above-mentioned An operating shaft 10 is supported and held in a pushable manner.

The operating shaft 10 passes through the through hole 4 of the display substrate 3, the insertion hole 9a provided in the elastic member 9, and the see-through glass 16, and is disposed with its tip protruding toward the front side of the indicator.

Further, a front panel 17 is provided on the front side of the transparent glass 16.

Note that an operation knob 1 is provided at the tip of the operation shaft 10.
8 is provided, and behind the display substrate 3, a lighting lamp 19 for night illumination is provided.

During night illumination, the illumination light from the illumination lamp 19 is introduced into the light guide 1 and the display board 2.
The light is guided to the lower surface of the display panel 2, and the display portions such as scales and characters on the display board 2 are illuminated. On the other hand, by pressing the knob 18 and pushing the operating shaft 10, the pressure is returned to zero by a cam or a gear (not shown).

In that case, an elastic member 9 for preventing light leakage is attached to the through hole 4 through which the operation shaft 10 passes through the display substrate 3, and since this elastic member 9 contacts the operation shaft 10, it is disposed below the display substrate 3. The irradiated light beam of the illumination lamp 19 is blocked by the elastic member 9, and the through hole 4 is thereby blocked.
There is no risk of light leaking to the surface side of the display substrate 3 from the display substrate 3.
Further, since the elastic member 9 is housed in the housing part 7 and is locked by the protrusion 8, there is no fear that the elastic member 9 will come out of the housing part 7 due to the pushing movement of the operating shaft 10.

Although it is preferable that there be a plurality of protrusions 8, a single protrusion 8 may be used. Further, in the above-described embodiment, an integration mechanism for a vehicle is shown, but it may also be applied to an operating shaft for adjusting the time of a clock or the like.

[Effect of idea]

As mentioned above, this idea consists of placing a transparent synthetic resin light guide above the main body of the indicating instrument.
A display plate is disposed on the surface of the light guide, and an operating shaft provided in the instrument body is inserted through a through hole provided in the light guide and the display plate to be taken out. An elastic member accommodating portion for preventing light leakage is formed at the periphery of one or both of the through holes on the surface where the light body and the display plate overlap each other, and a protrusion for locking the elastic member is provided at an appropriate position on the inner circumferential wall surface of this accommodating portion. When the display board and the light-transmitting body are overlapped, the elastic member clamped thereon prevents light from leaking through the through-hole of the display board, and since the elastic member is fixed by the protrusion, there is no risk of it slipping out. The practical effects are significant.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of this invention, Fig. 2 is an exploded perspective view of the same as above, Figs. It is a speedometer with a return zero type totalizer. 1... Light guide, 2... Display board, 4... Through hole, 5
... Instrument body, 7 ... Storage section, 8 ... Protrusion, 9 ...
...Elastic member, 19...Lighting lamp.

Claims (1)

[Scope of utility model registration request] A display board provided on the upper part of the instrument body of the indicating instrument, a light guide with translucency provided on the back side of this display board, an illumination light provided at the bottom of this light guide, and the display. A through hole provided correspondingly in the plate and the light guide, an operating shaft of the instrument body inserted into the through hole, and a periphery of the through hole on one or both of the mutually overlapping surfaces of the display plate and the light guide. A storage portion formed by providing a recess in the storage portion, a protrusion provided at a suitable position on the inner circumferential wall surface of the storage portion, and an elastic member for preventing light leakage that is engaged with the protrusion and stored in the recess. An indicating instrument characterized by: