JPH0127053Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a fixing device for attaching and fixing a lid to the opening side of an instrument case that houses automobile instruments and the like.

Generally, when fixing a lid to this type of instrument case, a plurality of fixing holes 2 are formed in the opening side periphery of the instrument case 1 made of synthetic resin, as shown in FIGS. 1 and 2. A mounting hole 4 is formed in the lid 3 to be attached to the opening side of the instrument case 1 in correspondence with the fixing hole 2 described above.

After assembling the instrument case 1 and the lid 3, place the tatsupin screw 5 along the mounting hole 4 of the lid 3, turn it toward the fixing hole 2 of the instrument case 1, and tighten. 5A fixing hole 2
I try to fix it by digging into it.

By the way, although not shown in the drawings, when replacing the instrument mechanism or parts stored in the instrument case 1, first remove the tatsu pin screw 5, remove the lid body 3 from the instrument case 1, and take out the instrument mechanism or parts assembled inside the instrument case 1. Then, cover the instrument case with the lid 3 again and tighten the tatsu pin screw 5 to fix it. At this time, when removing the tatsu pin screw 5 while turning it with a screwdriver etc., the thread 5A of the tatsu pin screw 5 is removed.
In between, the shavings of the instrument case 1 adhere and come out together with the tatupin screws 5 to the outside. If these shavings get inside the instrument case 1, they are very difficult to remove due to phenomena such as static electricity, and if they adhere to the instrument mechanism (not shown) housed inside the instrument case 1, they may interfere with the operation of the movable parts of the instrument. There is a possibility that it will come.

This idea solves the above-mentioned drawbacks by forming a guide groove toward the side wall of the instrument case that is continuous with the fixing hole formed in the instrument case, and from this guide groove, the shavings attached to the tatsupin screw are removed from the instrument case. It is designed to lead to the outside of the
The purpose is to reliably prevent shavings from entering the inside of the instrument case, and also to prevent damage to the movement of the moving parts of the instrument mechanism.

An embodiment of this invention will be described below with reference to FIGS. 3 and 4. In this case, the same or equivalent parts as in the conventional example described above will be described with the same reference numerals.

In the figure, reference numeral 1 denotes an instrument case molded from synthetic resin, and a fixing hole 2 is formed at an appropriate location on the opening side periphery of the instrument case 1, into which a tapping screw 5 is screwed and fixed.

Reference numeral 3 denotes a lid body that is attached to the opening side of the instrument case 1, and this lid body 3 has a mounting hole 4 formed at a position corresponding to the fixing hole 2 of the instrument case 1.

Thus, the instrument case 1 is formed with a guide groove 6 that is continuous with the fixing hole 2 and communicates with the outer wall of the case 1.

In the above configuration, the lid body 3 is placed on the opening side of the instrument case 1, and the instrument case 1 and the lid body 3 are fixed by tightening the screw pin 5 into the fixing hole 2 through the mounting hole 4. ing.

By the way, when replacing the instrument mechanism or parts stored in the instrument case 1, loosen and remove the pin screws 5, remove the lid body 3 from the instrument case 1, and replace the instrument mechanism or parts assembled inside the instrument case 1. Cover the instrument case 1 with the lid 3 again and tighten it with the pin screw 5 to fix it. At this time, when removing the tatsupin screw 5 by turning it with a tool such as a screwdriver, the shavings scraped off from the instrument case 1 adhere between the threads 5A of the tatsupin screw 5 and come out together with the tatsupin screw 5. come. However, due to the guide groove 6 formed continuously with the fixing hole 2 of the instrument case 1, the guide groove 6 forms a gap when the shavings attached between the threads 5A of the tatsupin screw 5 are removed while turning the screw 5. It is possible to take out the shavings to the outside of the case 1 along the guide groove 6 leading to the outer wall of the instrument case 1, thereby eliminating the need to drop the shavings into the inside of the instrument case 1, thereby eliminating troublesome shavings. It is also advantageous that there is no need to carry out removal work, and it is also possible to prevent the problem of shavings adhering to the moving parts of the instrument mechanism and impairing its characteristics.

Further, as shown in the figure, by slanting the bottom surface of the guide groove 6 downward as it approaches the outer wall of the instrument case 1, shavings can be removed from the guide groove 6.
It becomes easier to fall to the outside along the sloping bottom surface, and the above-mentioned effect can be more effectively exerted.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the fixing device between the instrument case and the lid of the conventional device, Fig. 2 is an enlarged sectional view of the main parts of Fig. FIG. 4 is an exploded perspective view of essential parts showing one embodiment, and FIG. 4 is a cross-sectional view of FIG. 3 in an assembled state and an exploded state. Instrument case 1, fixing hole 2, lid body 3, mounting hole 4,
Tatsupin screw 5, screw thread 5A, guide groove 6.

Claims (1)

[Scope of utility model registration request] The lid body is fixed to the opening side of an instrument case made of synthetic resin, and a fixing hole is formed on the periphery of the opening side of the instrument case, and the lid body has a fixing hole that corresponds to the fixing hole of the case. A mounting hole is formed at the position where the mounting hole is to be mounted, and a guide groove is formed in the instrument case that is continuous with the fixing hole and leads to the outer wall of the case, and a screw is screwed into the fixing hole of the instrument case through the mounting hole of the lid body. A fixing device for the instrument case that is designed to be tightened.