JPH0447620Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an indicating instrument.

[Conventional technology]

Conventionally, as shown in FIG. 5, a mounting plate 52 made of resin has a raised part 52a facing the stepped part 51a on the back side of a dial 51 made of resin having a stepped part 51a.
are polymerized, and a facing plate 53 is formed on the peripheral edge of the dial plate 51.
An indicating instrument is known in which the dial 51 is arranged to reduce parallax with the pointer 54, making it easier to read, and giving the dial 51 a three-dimensional appearance.

[The problem that the idea attempts to solve]

However, in the case of this conventional structure, when the dial 51 and/or the mounting plate 52 expands due to heat from illumination lights, heat from sunlight, etc., the stepped portion 51a and the raised portion 52a are in close contact with each other. Therefore, when either the dial 51 or the mounting plate 52 expands, and even when both of them expand, due to the difference in expansion rate, the mounting plate 52 generally
This causes the inconvenience that the thinner dial 51 may warp or bend.

[Means to solve the problem]

The present invention aims to provide an indicating instrument that can eliminate these disadvantages, and the gist of the present invention will be explained with reference to the accompanying drawings of FIGS. 1 to 4.

This device has a raised part 2a facing the stepped part 1a on the back side of a resin dial 1 having a stepped part 1a.
The indicator is characterized in that a thermal expansion absorbing space R is formed in a portion where the raised portion 2a and the stepped portion 1a face each other.

〔Example〕

Further, this example will be specifically explained.

1 to 3 show a first embodiment.

In the case of this embodiment, an instrument body 4 is housed inside an instrument case 3, and a mounting plate 2 (in this case, light guide plates are superimposed) is disposed above the instrument case 3. A dial plate 1 made of plastic is superimposed, an illumination lamp 5 is placed close to a mounting plate 2 which is a light guide plate made of resin, a pointer 6 is placed in the center of the light guide plate, and a front cover 7 is placed. The dial 1 is surface-illuminated by the lamp 5 through the light guide plate, and the hands 6 are also illuminated.

A thermal expansion absorption space R is formed in a portion where the step portion 1a of the dial plate 1 and the raised portion 2a of the mounting plate 2 face each other to absorb expansion of the dial plate 1 in the direction of the plate surface.

Further, a stepped portion 9 at the peripheral edge of the dial plate 8 is placed on the upper surface of the dial plate 1, and a gap 10 is similarly formed in the opposing portion of the dial plate 1 and the stepped portion 9.

Since the first embodiment has the above-mentioned configuration, even if the dial plate 1 expands thermally, warping or bending of the dial plate 1 can be prevented due to the existence of the thermal expansion absorption space R.

FIG. 4 shows a second embodiment.

In the case of this embodiment, the raised portion 2a is formed in a substantially convex shape, and the step portion 1a is formed in a substantially inverted concave shape. The non-transparent layer 12 printed when forming the display section 11 on the upper surface of the dial 1 is polymerized and hidden by the return plate 8, and the illumination light that passes through the transparent substrate 13 of the dial plate 1 and leaks from the side surface thereof is This is to prevent leakage from the abutting portion between the facing plate 8 and the dial plate 1.

A thermal expansion absorption space R is provided in both opposing portions of the dial plate 1 in the plate surface direction between the raised portion 2a and the stepped portion 1a.
is formed.

Therefore, in the case of the second embodiment as well, even if the dial 1 expands thermally, the existence of the thermal expansion absorbing space R prevents the dial 1 from warping or bending.

[Effect of idea]

As described above, the present invention forms a thermal expansion absorption space in the opposing portion of the raised portion and the stepped portion.
Even if the dial plate thermally expands due to heat such as illumination light or sunlight, warping or bending of the dial plate can be prevented.

As described above, the intended purpose can be fully achieved.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of the first embodiment, FIG. 2 is a vertical sectional view thereof, FIG. 3 is a partial sectional view thereof, and FIG. FIG. 5 is a partial sectional view of the conventional example. DESCRIPTION OF SYMBOLS 1... Dial plate, 1a... Step part, 2... Mounting plate, 2a... Raised part, R... Thermal expansion absorption space.

Claims (1)

[Scope of utility model registration request] A resin mounting plate having a raised part facing the stepped part is superimposed on the back side of a resin dial having a stepped part, and a thermal expansion absorption space is provided in a portion facing the raised part and the stepped part. An indicating instrument characterized by forming.