JPH0424677Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a fixing structure for upper and lower casings in telephone terminal equipment.

(Prior art) Fig. 5 is a partially cutaway side view showing the fixing structure of a conventional telephone terminal device, in which 1 is an upper casing, 2 is a lower casing, and 3
is an L-shaped hook formed integrally with the upper housing 1, 4 is a receiving groove for the hook 3 provided on the inner side surface of the lower housing 2, and is made of plastic, 5 is a fixing screw, and 6 is a handset. . As shown in the figure,
To fix the upper casing 1 and the lower casing 2, a hook consisting of one or more pairs of hooks 3 and their receiving grooves 4 is arranged on the back or side part, and these are fitted to secure the opposite front or side. It has a structure in which the lower casing 2 is fixed to a part of the upper casing 1 from the bottom side using one or more fixing screws 5.

(Problem to be solved by the invention) However, even with the above structure, if a load such as a drop impact is applied during transportation or handling during use, the hooks on the upper and lower casings, that is, the hooks Claw 3
and the receiving groove 4 are disengaged, and the upper and lower casings are separated.
As a result, there was a problem of functional impairment.

Therefore, the purpose of this invention is to eliminate the problem of the above-mentioned prior art in which the hooking portions of the upper and lower casings come off due to drop impact, and to provide a fixing structure with excellent reliability.

(Means for Solving the Problems) In order to achieve the above object, this invention uses a hook portion consisting of a pair or more L-shaped hooks and a receiving groove for fixing the upper and lower casings. In the fixing structure of the upper and lower casings, the upper and lower casings are arranged on the back or side parts, are fitted together, and the opposing front or side parts are screwed from the bottom of the lower casing to a part of the upper casing using fixing screws. , one or more ribs are provided along the inner wall of the casing at positions close to both sides of the hooking pawl, less than the other casing.

(Function) In this way, even if a load such as a drop impact is applied to the upper and lower plastic housings, the displacements of the upper and lower housings follow each other and form the same mode, thereby preventing the hook from coming off.

(Example) Figure 1 is a partially cutaway side view showing an embodiment of the upper and lower housing fixing structure of the present invention, Figure 2 is a perspective view of the lower housing, and Figure 3 is the same as shown in Figure 1. A detailed view of the notch, FIG. 4 is an inside front view of FIG. 3. As shown in the figure, in the structure in which the upper case 1 and the lower case 2 are hooked and fixed, one or more L-shaped hooks 3 formed on the upper case 1 fit into the receiving grooves 4 of the lower case 2. The upper casing 1 and the lower casing 2 are supported and fixed together, and are fixed with screws at positions opposite to the upper casing 1 and the lower casing 2 (see FIG. 5).
Furthermore, one or more ribs 7 protruding upward from the lower casing 2 along the inner wall of the upper casing 1 are arranged close to both sides of the hooking claw 3, each having a specified width and a specified height depending on their strength. This is how it was done.

In this way, as shown in Figure 3, the upper casing 1
Displacement in the direction of arrow A due to deformation of the lower housing 2
The upper and lower housings follow each other in the direction B due to the deformation of the housing, and the mutual relationship between the hooking claw 3 and the receiving groove 4 does not change even when an impact load is applied, so that they do not come off. The arrangement of the hooking claw 3 and the receiving groove 4 can be appropriately determined at one or more locations, and can be placed on either the back or the side surface, and the hooking claw 3 and the receiving groove 4 can be placed upside down. In that case, the ribs 7 are also provided in reverse.

(Effects of the invention) As explained in detail above, according to the invention, the hook fixing part is further provided with a rib, so that
Even if the upper and lower plastic housings are subjected to a load such as a drop impact, the displacement between the upper and lower housings will follow each other, creating the same mode, which prevents the hook from coming off, and the ribs also serve to reinforce the housing itself. There is an effect.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an embodiment of the upper and lower casing fixing structure of the present invention, Fig. 2 is a perspective view of the lower casing, and Fig. 3 is a detail of the notch shown in Fig. 1. 4 is an inside front view of FIG. 3, and FIG. 5 is a partially cutaway side view showing a conventional upper and lower housing fixing structure. 1... Upper casing, 2... Lower casing, 3... Hook claw,
4... Receiving groove, 5... Screw, 6... Hand set, 7... Rib.

Claims (1)

[Scope of Claim for Utility Model Registration] An L-shaped hook protruding from the upper housing toward the lower housing on the inner surface of the front side of the upper and lower housings made of a plastic upper housing and a lower housing, facing each other. A housing structure of a telephone terminal device in which a lower housing is provided with a hook portion having a receiving groove that engages with the L-shaped hook claw, and rear portions of the upper and lower housings are fixed with screws. At least one strip-shaped rib having a prescribed width and a prescribed height protrudes from the lower housing toward the upper housing near both sides of the L-shaped hook and along the inner walls of the upper and lower housings. What is claimed is: 1. A structure for fixing upper and lower casings of telephone terminal equipment.