JPH0428018Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a fixing structure for attaching the dial of an indicating instrument to the instrument body.

[Conventional technology]

Generally, this type of instrument, such as a vehicle indicator instrument, will be explained using FIGS. 1 and 2 as an example.

In the figure, a transparent glass 2 is fitted to the open surface side of an instrument case 1, and an instrument body 3 is housed and fixed inside the instrument case 1. In addition, a dial plate 5 is attached to the upper part of the instrument body 3 through screws 4, etc.
is fixed, and above the dial 5 is the instrument body 3.
A pointer 6 that operates in conjunction with the instructions is attached, and a lighting lamp 7 for night illumination is provided on the back side of the dial 5.

Therefore, the dial plate 5 is formed of a transparent substrate 5A such as polycarbonate resin, and a display portion 8 such as letters and scales and a light shielding layer 9 are formed on the surface of the substrate 5A, and the illumination lamp The irradiation light beam from 7 is guided into the substrate 5A, and the display portion 8 formed on the substrate 5A is transmitted and illuminated by this light beam.

Further, in this case, a mounting boss portion 11 is formed on the back side of the dial plate 5 corresponding to the mounting hole 10 position of the screw 4 formed on the substrate 5A of the dial plate 5, and the height dimension of the mounting boss portion 11 is The clearance between the substrate 5A of the dial plate 5 and the instrument body 3 is set, and consideration is given to efficiently guide the irradiated light from the illumination lamp 7 to the display section 8 of the dial plate 5. The height dimension of the mounting boss portion 11 is set in consideration of the dimensions of the parts of the instrument and the like.

By the way, as shown in Figure 2, the dial 5
The mounting boss portion 11 is integrally provided on the back side of the board 5A, and the lower surface of this mounting boss portion 11 is connected to the instrument body 3.
It is attached and fixed with screws 4 in contact with the upper surface side. At this time, as disclosed in, for example, Japanese Patent Publication No. 53-2065, a transmitted light adjusting film for uniformizing the illuminance is formed by printing on the back surface of the substrate 5A of the dial plate 5, so that the irradiated light from the illumination lamp 7 is It is conceivable to adjust the amount of irradiation in areas where the intensity is locally increased by using the above-mentioned transmitted light adjustment film, etc., but since the mounting boss portion 11 partially protrudes from the back surface of the substrate 5A, it is not commonly used. This may make screen printing impossible, and it may take time and effort to print the back side of the substrate 5A.

To avoid this, for example,
As illustrated in Publication No. 73785, it is conceivable to interpose a separate mounting boss between the dial and the plate of the instrument body, and to fix and hold the dial and the instrument body side using fixing screws. .

[Problem that the invention attempts to solve]

However, in the spacer mechanism using the mounting boss of this invention, the dial substrate is formed flat, so a transmitted light adjustment film etc. can be easily applied to the back surface of the substrate by means such as screen printing. However, when attaching the dial to the instrument body, a separate mounting boss must be installed between the dial and the instrument body before tightening the screws, and the parts themselves are small, making assembly difficult. There are some difficult aspects.

The purpose of this invention is to facilitate the assembly work and to form the back surface of the dial substrate into a flat surface to facilitate printing and other means.

[Means for solving problems]

In order to achieve the above object, the present invention forms a fixing hole for fixing the dial plate at the upper end of the instrument body, forms a mounting hole in the dial plate corresponding to this fixing hole, and connects the dial plate to the instrument body. A hollow mounting boss is provided to set the clearance between the dial and the instrument body, and the fixing member is inserted through the mounting hole of the dial, the hollow mounting boss, and the fixing hole of the instrument body. In the dial fixing device, in which the dial is attached and fixed on the instrument body via the mounting boss part with a fixing member, a recessed part is provided at the periphery of the mounting hole on the back side of the dial. The hollow mounting boss portion is formed with an engaging portion that fits into the recessed portion of the dial plate, and a longitudinal direction of the mounting boss portion is formed to provide elasticity in the radial direction of the mounting boss portion. A fixing of a dial plate characterized in that a slit is formed along the slit, and the engaging part of the mounting boss part is temporarily fixed to the recessed part of the dial plate by the self-elasticity of the mounting boss part due to the slit. It's in the device.

〔Example〕

This invention will be described below based on embodiments shown in the accompanying drawings.

3 to 6 show an embodiment of this invention, which will be explained here using a vehicle indicator as an example.

In the figure, a transparent cover 21 is fitted to the opening side of the instrument case 20, and the instrument case 20
A meter body 22 is housed and fixed inside.

Further, a dial plate 23 is arranged above the meter body 22, and above this dial plate 23, the meter body 22 is arranged.
A pointer 24 is attached that operates in conjunction with instructions from the dial 23, and a lighting lamp 25 for night illumination is provided on the back side of the dial 23, that is, on the inner lower side of the instrument case 20.
is installed.

Further, the dial plate 23 is formed of a transparent substrate 23A made of synthetic resin, such as polycarbonate resin or acrylic resin, and a display portion 26 such as characters and scales that can transmit illumination is formed on the dial plate substrate 23A. A light shielding section 27 is formed on the substrate 23A except for the display section 26.

A fixing hole 28 for fixing and holding the dial plate 23 is formed in the upper end plate portion of the instrument body 22, and a mounting hole 29 is formed in the dial plate 23 in correspondence with this fixing hole 28. ing.

Further, a recessed portion 30 is formed on the back surface of the dial substrate 23A, surrounding the periphery of the mounting hole 29 formed in the dial plate 23.

Further, a hollow mounting boss portion 31 is arranged on the back side of the dial substrate 23A corresponding to the position of the mounting hole 29 formed in the substrate 23A of the dial plate 23, and the height of the mounting boss portion 31 allows the dial plate to be 23 and the instrument body 22, and consider that the irradiated light from the illumination lamp 25 can reach the display part 26 of the dial 23 through the gap created by this clearance, and the indicator that protrudes from the upper end side of the instrument body 22. The mounting boss portion 31 should be adjusted in consideration of the dimensions of the parts, etc., or to match the height dimensions of other indicating instruments.
I am trying to set the height dimension of.

Further, the hollow mounting boss portion 31 has a recessed portion 3 formed on the back surface of the substrate 23A of the dial plate 23.
An engaging portion 32 that fits into the mounting boss portion 31 is formed, and a slit 33 is formed along the longitudinal direction of the attachment boss portion 31. In this case, slit 33
This imparts elasticity to the mounting boss portion 31 in its radial direction. 34 is the dial 23 and the instrument body 2
In this embodiment, the fixing member 34 is formed of a screw, but it may be a rivet or the like.

The assembly of the above configuration will be explained.

First, the engaging part 32 of the mounting boss part 31 is fitted along the recessed part 30 formed on the back side of the base plate 23A of the dial plate 23. At this time, the engaging portion 32 of the mounting boss portion 31 is engaged with the rising inner wall surface of the recessed portion 30, and the mounting boss portion 31 is temporarily fixed and held on the dial plate 23.

Next, the dial plate 23 with the mounting boss portion 31 temporarily held is placed on the instrument body 22, and the mounting hole 29 position formed in the dial plate 23 is placed along the position of the fixing hole 28 formed in the instrument body 22, Fixed member 34
That is, by inserting a screw from above the dial 23 into the mounting hole 29 and tightening it into the fixing hole 28 of the instrument body 22, the mounting boss portion 31 is attached to the instrument body 22.
The dial plate 23 can be fixed via.

By assembling and fixing the dial plate 23, a gap corresponding to the height of the mounting boss portion 31 can be obtained between the instrument body 22 and the dial plate 23, and this gap allows the irradiation light from the illumination lamp 25 to be It becomes easier to guide the light to the display section 26 formed on the plate 23, and it becomes possible to enhance the lighting effect.

Also, for example, the dial 2 near the illumination light 25 position
An adjustment film that adjusts the amount of transmitted illumination light is printed on the display part 26 of No. 3 or on the back side of the substrate 23A of the dial 23 that is reflected within the instrument case 20 and locally condenses on the back side of the dial 23. When forming, by forming the back side of the substrate 23A of the dial plate 23 flat, a transmitted light amount adjustment film etc. can be easily formed by means such as screen printing, and the irradiation light of the illumination lamp 25 can be easily formed. This makes it possible to display the display portion 26 formed on the dial plate 23 with almost average illumination, and after applying the transmitted light amount adjusting film, the mounting boss portion 31 is temporarily fixed and held on the back surface of the dial substrate 23A. This allows for easy assembly of the dial 23. Note that the height of the mounting boss portion 31 may be appropriately set depending on lighting effects, the dimensions of the parts of the indicator protruding from the upper end of the instrument body 22, the heights of other indicators, and the like.

Further, in this embodiment, the slit portion 33 is formed in the mounting boss portion 31, and the entire mounting boss portion 31 is formed into a horseshoe shape, so that the engaging portion of the mounting boss portion 31 is formed as shown in FIG. 6B. 32 is fitted into the rising inner wall surface of a recessed portion 30 formed on the back surface of the dial substrate 23A, and is engaged with the mounting boss portion 31 in a somewhat expanded state using its own elasticity. Although not shown, the engaging portion 3 of the mounting boss portion 31
2 is formed on the back surface of the dial substrate 23A.
Fit into the rising outer wall surface of the mounting boss part 3.
The elasticity of the parts 1 itself may be used to hold the parts in a somewhat pinched state.

[Effect of idea]

Therefore, as described above, in the present invention, a recessed part is formed on the back side of the dial around the periphery of the mounting hole, and the hollow mounting boss part has an engaging part that fits into the recessed part of the dial. At the same time, a slit is formed along the longitudinal direction of the mounting boss in order to provide elasticity in the radial direction of the mounting boss. By temporarily holding the engaging part of the above-mentioned mounting boss part, you can easily temporarily hold the mounting boss part on the back side of the dial. It can be configured by simply selecting a mounting boss portion with appropriately set dimensions, and the dial plate can be easily fixed to the instrument body.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing a general indicating instrument device;
Fig. 2 is a partial sectional view showing the fixed state of the dial of Fig. 1, Fig. 3 is a sectional view of an indicating instrument device showing an embodiment of this invention, and Fig. 4 is a partial sectional view of the dial of Fig. 3. FIG. 5 is an exploded perspective view showing the main parts of FIG. 4; FIG. 6A is an enlarged exploded perspective view showing the main parts of FIG. 5 in cross section; FIG. 6B 6A is an enlarged cross-sectional view of the main parts showing the assembled state of FIG. 6A. Instrument body...22, Dial board...23, Board...
23A, illumination light...25, display part...26, light shielding part...27, fixing hole...28, mounting hole...29,
Recessed part...30, Mounting boss part...31, Engagement part...
...32, slit...33, fixing member...34.

Claims (1)

[Scope of utility model registration request] A fixing hole for fixing the dial plate is formed at the upper end of the instrument body, a mounting hole is formed in the dial plate corresponding to this fixing hole, and a mounting hole is formed between the dial plate and the instrument body. A hollow mounting boss part is provided to set the clearance for In the dial fixing device in which the dial is attached and fixed by a fixing member through the dial, a recessed part is formed on the back side of the dial around the periphery of the mounting hole, and the hollow mounting boss part is formed on the back side of the dial. In addition to forming an engaging portion that fits into the recessed portion of the dial plate, a slit is formed along the longitudinal direction of the mounting boss portion in order to provide elasticity in the radial direction of the mounting boss portion. A fixing device for a dial plate, characterized in that the engaging portion of the mounting boss portion is temporarily fixed and held in the recessed portion of the dial plate by the self-elasticity of the mounting boss portion.