JPS5843791Y2 - Case fixing structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a case fixing structure in a small wireless device.

In general, the housings of small wireless devices are often made of synthetic resin molded products, and the circuit parts mounted inside are often placed in a case for the purpose of electrical hindrance or protection. The first method is to fix the body and housing cover.
As shown in the figure, when molding the housing 1 from synthetic resin, an insert 4 with a female thread cut is embedded, and the case 6 is
is provided with an L-shaped metal fitting 7, which is screwed to the insert 4 to fix the case 6 to the housing 1.

Further, the housing cover 2 was screwed to the housing 1 using a separately provided insert 3.

However, in the above structure, since the inserts 3 and 4 are embedded during molding of the housing, the number of inserts increases, the molding cycle bottoms out, and productivity deteriorates.

In addition, there are disadvantages such as the need for more screws, which requires more time to assemble, and the number of inserts and the like must be kept to a minimum in order to increase the packaging density in small devices.

An object of the present invention is to provide a case fixing structure that improves the above points.

Hereinafter, embodiments will be explained in detail with reference to the drawings.

As shown in FIG. 2, when molding the housing 1 from synthetic resin, a stepped insert 5 formed by forming a flange portion 10 with a thicker outer diameter at the end is embedded, and the case 6'
A recess 8 is provided on one side and the opposite side to serve as a guide for the insert 5, and a leaf spring-shaped stopper 9 is fixed therein by eyelets, spot welding, or the like.

The inserts 5 provided at two locations engage with the four portions 8 of the case 6', respectively, and the tip of the stopper 9 is hooked on the flange portion 10 of the insert.

Therefore, when the case 6' is engaged with the insert 5, the case 6' is fixed to the housing 1 as shown in FIG. 2.

Further, a female thread is cut in the insert 5 and the housing cover 2 is fixed using this thread.

In this way, the insert 5 is commonly used to fix the housing 1, the housing cover 2, and the case 6'.

For fixing the case 12, insert the insert 5 and the recess 8
If one is not provided in that location, one can also be done using a conventional method as shown in FIG.

Alternatively, the guide 11 of the insert 5 may be provided without providing the recess 8 as shown in FIG. 3a, and the stopper 9 may be fixed there.
Alternatively, the case 13, guide 11', and stopper 9 may all be integrally molded from synthetic resin as shown in FIG.

With the above structure, the number of inserts can be reduced, which improves the productivity of the housing. There are also fewer screw-fastening points, which makes it easier to attach and detach the cases 6' and 12 and 13, which makes assembly work easier. This provides effects such as simplification, improved maintainability, and increased implementation efficiency.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing a conventional example, Fig. 2 a is an exploded perspective view showing an example of the present invention, Fig. 2 is a side view showing the assembled state, and Figs. 3 a and b are the present invention. FIG. 2 is a perspective view of a case showing an embodiment of the invention. In the figure, 1 is a housing, 2 is a housing cover, 3, 4 are inserts, 5 is a stepped insert, 6.6', 12.13 are cases, 7 is a metal fitting, 8 is a recess, 9 is a stopper, 10 is a flange portion, and 11 is a guide.

Claims (1)

[Scope of utility model registration request] In the fixing structure of the case, in which the case is installed and fixed in the case consisting of the case body and the case cover, a recess is provided on the side surface of the case, a spring-like stopper is provided here, and a female thread is provided at the tip. A stepped insert formed with a flange portion is embedded in the housing and engaged with the recess, the stopper is hooked on the flange portion of the stepped insert to fix the case, and the female screw is used to secure the housing. A case fixing structure characterized by fixing the cover.