JPH0127230Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the structure of a switch box for fixing a switch of a key telephone main device.

[Conventional technology]

Recently, the housings and internal structures of telephone-related equipment, especially home equipment, have been designed to be smaller and lighter. Key telephone main units also tend to have electrical components mounted in a small, thin resin-molded case with high density.

The power switch of the key telephone main unit is rather large because it controls several lines of the key telephone.
When this switch is mounted in a housing, it is necessary that the mounting area be small because the housing is small. Also, it is desirable to avoid fixing the device to the housing with screws due to cost considerations. A switch fixing structure that satisfies these demands is not yet well known.

[Problem that the invention attempts to solve]

In view of the above-mentioned circumstances, an object of the present invention is to provide a switch box particularly suitable for mounting a power switch of a button telephone main device having a resin molded housing.

[Means for solving problems]

The switch box of the present invention has a button telephone main device housing consisting of an upper frame body and a lower frame body which are molded with resin. The box is a cylindrical box provided in the vicinity of the window opening of the upper frame body, the upper surface of which is open, and at least one of the side walls has a vertical groove.

The switch inserted and mounted through the opening of the box has its flange portion in contact with the upper end surface of the box, the lower part of the flange is held by elastic stress on the peripheral wall of the box, and the switch lever at the upper part of the flange is in contact with the upper end surface of the box. It is fitted so that it is located at the opening of the body.

[Effect]

The lower part of the flange of the switch is held by elastic stress on the peripheral wall of the box. As an example of this holding method, as shown in the example below, a protrusion is provided at the lower part of the flange of the switch, and when the switch is inserted through the opening of the box, the peripheral wall is pressed to expand the opening surface and the switch is inserted into the box. The protrusion is fitted into a notch provided on the inner wall surface of the box, and the box is held in this state by the elastic stress of the surrounding wall of the box. Since the box is installed upright on the lower frame of the housing, its horizontal area is only slightly larger than the area of the switch, making it suitable for high density. Furthermore, since the housing is thin, the switch lever can be easily operated from the window opening in the upper frame.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an exploded perspective view of the casing of the key telephone main unit. The upper frame body 1 and the lower frame body 2 are resin molded bodies, and are joined at the front side with hooks using nails, and screwed at the rear side. The switch box 3 of the present invention (hereinafter abbreviated as box) is a lower frame body 2.
It is integrally formed into an upright cylindrical body. It has a groove 4 in one of its side walls. The box 3 is placed directly below the window opening 5 of the upper frame body 1,
The height of the box 3 is also set to such a height that the switch lever can be operated from the outside through the window opening 5 when the switch is inserted and fixed in the box 3.

By the way, as the switch, a switch as shown in FIG. 2a can be used. This switch 6 has a switch lever 62 at the upper part of the flange 61, and a lead wire 65 is taken out from the lower part 63. The lower part 63 has a protrusion 64 opposite to it.
The shape of the box 3 is such that its opening end side 31 is approximately in contact with the periphery of the lower part 63 of the switch 3. Therefore, the protrusion 64 of the switch 6 comes out from the opening edge 31 of the box 3, but is inserted by pushing it by hand as shown in FIG. 2b. Since the box 3 is elastic and has a groove 4, the opening edge 31 is placed on the outside and the switch 3
is inserted into the opening, and the flange 61 of the switch 3
When the switch 3 is just in contact with the upper end surface of the box 3, the protrusion 64 fits into the notch 32 in the inner circumferential wall of the box 3, as shown in FIG. 3b, and the switch 3 is held stably by the stress from the circumferential wall. Become so. Further, the switch lever 62 is located at the window opening portion 5 of the upper frame body 1.

The lead wire 65 of the switch 6 can be appropriately taken out from the groove 4 as shown in FIG. 3a.

[Effect of idea]

As explained above in detail, the switchbox of the present invention can be made integrally with the lower frame of the housing and resin mold, and is therefore extremely easy to manufacture. Furthermore, since the elastic stress of the resin molded member is used to insert and fix the switch and no screws are used at all, no parts are required for installation.

The shape is an upright cylindrical body, and its horizontal area only needs to be slightly larger than the horizontal area of the switch, so it occupies a small area on the lower frame board, contributing to the miniaturization of the casing.

[Brief explanation of the drawing]

The drawings show an embodiment: Fig. 1 is an exploded perspective view of a housing equipped with the switchbox of the present invention, Fig. 2 is an enlarged perspective view of the switch and switchbox used, and Fig. 3 is a front view of the switch mounted. FIG. 2 is a diagram and a sectional view thereof. 1... Upper frame body, 2... Lower frame body, 3... Switch box, 4... Warning groove, 5... Window opening, 6...
...Switch, 31...Opening end, 32...Notch, 61...Flange, 62...Switch lever, 63...Switch lower part, 64...Protrusion,
65... Lead wire.

Claims (1)

[Claims for Utility Model Registration] In a button telephone main device housing consisting of an upper frame body and a lower frame body which are molded with resin, A cylindrical box that stands upright and is provided close to the window opening of the upper frame body, the upper surface of which is open, and at least one of the side walls has a groove in the upright direction, and the box is inserted and installed through the opening of the box. The switch is configured such that the flange part is in contact with the upper end surface of the box, the lower part of the flange is held by elastic stress on the peripheral wall of the box, and the switch lever at the upper part of the flange is located in the window opening part of the upper frame body. A switch box for a main device of a button telephone, characterized in that it is fitted to the switch box.