JPS6122367Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a case coupling structure suitable for telephone cases, etc., which can be easily assembled without using any fastening means such as set screws. It is.

[Prior art]

Conventionally, for example, structures for attaching the upper casing of a split telephone to the lower casing include screw-fastening structures, or a structure in which a locking lever is provided on one casing and the locking lever is attached to the other casing. It is known that the two housings are integrally connected by providing a locking guide that fits into the housing.

[Problem that the invention attempts to solve]

Both of these tasks are performed after various mechanisms have been mounted inside the casing, so in the former case, the work must be carried out while supporting a relatively large and heavy casing, resulting in poor work efficiency and In the latter case, it is necessary to increase the precision of the fitting between the locking lever and the locking guide, which requires strict manufacturing precision and poses problems such as poor space efficiency of the housing.

[Means for solving problems]

The present invention has been made in view of the above-mentioned points, and provides a mounting structure for a telephone casing that eliminates fastening means such as set screws and can be easily mounted and removed with a single touch. The feature is that a coupling means is provided on the inner surface near the joint surface of both the divided housings, each consisting of an engagement block having a through hole in the height direction and an engagement projecting wall in the height direction. The through-side end of the engagement piece inserted into the through-hole abuts against the engagement projecting wall, thereby restricting backward movement or forward movement of one housing relative to the other housing. It's because it's configured.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

〔Example〕

FIG. 3 is an external perspective view of a public telephone employing the coupling structure of the present invention. To explain the general structure of this public telephone with reference to the same figure, what is designated as a whole by reference numeral 1 is a telephone housing, and this telephone housing 1 consists of an upper housing 2A, a lower housing 3A, and both of these housings 2A. ，
Both casings 2A, 3A cover the front opening 5 of 3A.
The front cover 4A is attached to the front cover 4A. The front cover 4A is provided with an input slot 6 at the top, a push-button dial 7 at the center, and a coin return slot 8 at the bottom.
Further, on one side of this phone housing 1, there is an upper housing 2.
A and a lower casing 3A are provided with a handset mounting stand 9 which is formed separately and integrally connected to each other by engaging means to be described later, and a handset 11 is placed thereon via a hook button (not shown). ing.

The upper housing 2A is integrally formed of synthetic resin and includes an upper plate 2a, a pair of left and right side plates 2b,
2c and a back plate 2d, and the front and bottom surfaces are open. As shown in FIG. 2, a pair of left and right side plates 2 are provided on the inner surface of the lower end of the upper housing 2A, that is, in the vicinity of the joint surface 12 with the lower housing 3A.
One pair each for b, 2c and back plate 2d,
A total of six horizontally long engagement protrusions 13 are integrally provided, and engagement blocks 14 and 15 are integrally provided on the front end sides of both side plates 2b and 2c and on the inner surfaces near the joint surfaces 12, respectively. It is installed protrudingly. Each of the engagement blocks 14 and 15 is provided with a through hole 16 that passes through it in the vertical direction. This through hole 16 has an engaging piece 1 that is slidable in the vertical direction.
A bent portion 17a is continuously provided at the upper end of the engaging piece 17, and a protrusion 17b for preventing slippage is protruded from the inner surface of the lower end.

On the other hand, the lower housing 3A is integrally formed of synthetic resin like the upper housing 2A, and has a pair of left and right side plates 3b, 3c, a back plate 3d, and a bottom plate 3e. The top surface is open. On the other hand, a safe storage recess 19 is formed at the rear end of the side plate 3c, and a safe 20 is housed in this recess and is locked by a locking mechanism (not shown).

A total of six fitting protrusions 22 are integrally provided on the inner surface of the upper end of the lower housing 3A, that is, on the inner side near the joint surface 21 with the upper housing 2A, corresponding to each of the engaging protrusions 13. Fitting grooves 23 into which the engaging protrusions 13 fit and engage are formed on the outer surfaces of these fitting protrusions 22, respectively. The pair of left and right side plates 3b, 3c are provided with long vertically protruding portions on the inner surfaces of the front end portions corresponding to the respective engaging pieces 17 of the upper housing 2A. The engaging projecting wall 24 is provided at the rear end side of the engaging piece 17, thereby restricting and preventing rearward movement of the engaging piece 17, in other words, the upper housing 2A.

When assembling the upper housing 2A and the lower housing 3A configured in this way, as shown in FIG. It is placed in a state that it is slightly shifted rearward than the original position, and is slid forward along the joining surface 21. That is, the upper housing 2A is
3 and the corresponding fitting protrusion 22 of the lower housing 3A
When the upper housing 2A is moved forward, the upper housing 2A is placed on the lower housing 3A so that the front and back positions are shifted, and the upper housing 2A is moved forward. The engaging protrusions 13 are fitted into and guided by the fitting grooves 23 of the fitting protrusions 22 provided on both sides 3b and 3c of the lower housing 3A, and the front end faces of the upper housing 2A and the lower housing 3A are When the two are completely aligned, the engaging protrusion 13 received on the back plate 2d of the upper housing 2A is fitted into the fitting groove 23 of the fitting protrusion 22 provided on the rear plate 3d of the lower housing 3A. ,
This engagement restricts upward and forward movement of the upper housing 2A. Next, in this state, the engaging pieces 17 provided on both side surfaces 2b and 2c of the upper housing 2A are pressed against the respective bent portions 17a. As a result, the rear side edge of the engaging piece 17 that protrudes downward from the through hole 16 and is exposed comes into contact with the engaging projecting walls 24 provided on both sides 3b and 3c of the lower housing 3A, and the upper housing A backward movement of 2A is defined. The upper casing 2A and the lower casing 3A are thus integrally joined, and then the front cover 4A is attached to the front opening 5 of both the casings 2A, 3A to assemble the telephone casing 1.

In the above embodiment, as a means for restricting the upward and downward movement of the upper case 2A and the lower case 3A, the upper case 2A is provided with an engaging protrusion 13 that is fitted into the lower case 3A. Although the case has been described in which the fitting protrusion 22 having the fitting groove 23 is provided, the present invention is not limited thereto. Of course, it may be provided in the housing or the shape may be changed.

Furthermore, in the above embodiment, by moving the upper housing 2A forward, the engagement protrusion 13 is moved to the fitting protrusion 2.
Although the upper housing 2A is fitted into the fitting groove 23 of No. 2, it is of course possible to shift the upper housing 2A backward and fit into the fitting groove 23. In this case, the engaging protrusion wall 24 It may be provided on the front end side of the engagement piece 17.
Furthermore, the housing may be divided vertically as in the embodiment, but may also be divided horizontally.

[Effect of idea]

As explained above, according to the present invention, an engagement block having a through hole in the height direction on the inner surface near the joint surface of each of the two divided casings and an engagement protrusion wall in the height direction. A locking means is integrally formed, and the penetrating side end of the engaging piece fitted into the through hole of the engaging block abuts against the engaging projecting wall to prevent movement of the casing from being restricted. Since the structure is such that the two casings are joined together,
There is no need for any setscrews or the like as in the past, so it is extremely easy to install and remove, greatly improving assembly work efficiency, and also providing excellent workability during maintenance and inspection. In addition, the structure is simple, the number of parts can be reduced, and the space efficiency inside the housing can be improved, so the practical effects are very large.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the main parts showing the joint structure of the upper case and lower case, Fig. 2 is an overall perspective view illustrating the assembly operation of the upper case and lower case, and Fig. 3 is a perspective view of the present invention. FIG. 1 is an overall perspective view of a public telephone that employs such a coupling structure. 1... Telephone housing, 2A... Upper housing, 3A...
...Lower housing, 4A...Front cover, 12...Joint surface, 13...Engagement protrusion, 14, 15...Engagement block, 16...Through hole, 17...Engagement piece, 17a
. . . bent portion, 21 . . . joint surface, 22 . . . fitting projection, 23 .

Claims (1)

[Scope of utility model registration request] In a housing that is divided into at least two parts and assembled by moving one of the housings along the joining surface, the housing has a through hole in the height direction on the inner surface near the joining surface of the one housing. The coupling block is integrally formed, and an engagement projecting wall extending in the height direction is integrally formed on the inner surface near the joint surface of the other housing, and the penetration side edge of the engagement piece inserted into the through hole is A casing coupling structure characterized in that movement of the casing is prevented by abutting against an engaging projecting wall.