JPS6119474Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone switch, and more particularly to a structure for adding a contact spring to the switch.

As is well known, a foot switch is used to switch between a signal circuit and a communication circuit by raising and lowering the handset, and its mechanism consists essentially of a foot lever that moves up and down as the handset is raised and lowered, and a foot lever integrated into this foot lever. It consists of a converter that rotates, a contact spring that is opened and closed by an operating piece provided on the converter, and a hook frame for assembling and fixing these.

By the way, in some telephones, it may be necessary to add a new contact spring to the hook switch in order to add functions such as a confidential circuit.
In consideration of this, it is required to form a retaining portion of the additional contact spring in advance on the switch body.

However, there are a wide variety of types of telephones on which the switch is installed, and the configuration of the additional contact spring differs depending on the usage and added functions. Therefore, it is necessary to form a mounting part on the main body of the switch that meets these requirements. This is undesirable because the mounting portion unnecessarily occupies the limited space inside the telephone.

In view of these problems, the present invention attempts to provide a structure in which additional contact springs of different configurations can be assembled to the main body of the main switch depending on the type of telephone to which the switch is installed or the functions to be added. .

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

FIG. 1 shows an exploded perspective view of the contact spring extension structure according to the present invention, in which a plurality of extension contact springs 1
3' is extended by an additional insulating block 20 to the surface of the hook frame 14 opposite to the location where the existing contact spring 13 is installed.

Here, connect the switch body 10 to the contact spring 1.
The drive mechanism of the existing contact spring 13 will be explained with reference to FIG.
is integrated and pivotally supported by the hook frame 14, so that the operating piece 12a rotates in response to the raising and lowering of the handset, thereby opening and closing the contact spring 13 held between the hook frame 14. has been done.

In addition, the hook part 10 is configured such that a claw part 15 integrally formed on the hook frame 14 can be latched onto a printed wiring board (not shown) installed inside the telephone. Directly mounted. Further, the contact spring 13 is held so that its lower end protrudes from the lower end of the hook frame 14, so that it can be electrically connected to the hook switch body 10 by soldering it to a printed wiring board. In this embodiment, an insulating block 20 is used to make it possible to add a plurality of additional contact springs 13' to the switch main body 10. The insulating block 20 is removably installed on a side wall 14-1 of the surrounding wall of the hook frame 14, which is opposite to the side wall where the contact spring 13 is installed. For this reason, a square hole 16 is provided in the lower part of the side wall 14-1. Also, side wall 1
Hook portions 17, 17 are provided on both side walls of the hook frame 14 adjacent to the hook frame 4-1 at positions at heights corresponding to the holes 16, respectively. These holes 16 and hook portions 17 serve as receiving portions for attaching the insulating block 20. The converter 12 within the hook frame 14 is provided with an actuating piece 12a' extending in the opposite direction to the actuating piece 12a, and protruding from an arcuate hole 19 provided in the side wall 14-1.

The insulating block 20 will be explained with reference also to FIG.

The insulating block 20 has two prismatic columns 21 and 21' spaced apart in the lateral direction that can fit into the hole 16 of the hook frame 14 in the center of one end surface, and the prismatic columns 21 and 21', which have the same end surface, are spaced apart from each other in the horizontal direction. , 21' are provided with claw portions 22 on both sides of the prisms 21, 21'.
It is provided so as to have the same length as 1' and extend in the same direction. Projections 21a and 21a' (the lower side is not shown) are provided on the upper and lower walls of the square columns 21 and 21', respectively, and grooves 16a and 21a' are provided in the hole 16 of the hook frame 14 to fit with these projections. 16a' is provided (these may have a reverse relationship) to facilitate positioning and to prevent lateral displacement of the insulating block 20 after installation.

Further, on one end surface of the insulating block 20, a prismatic column 2 is provided.
1 and 21' are provided on the upper and lower sides of the plate bodies 23 and 23' for forming a holding portion for the additional contact spring 13'. In particular, the upper plate body 23 is provided with two notches 23a and 23b to form three protrusions 23.
-1, 23-2, 23-3 are formed. Furthermore, a notch 23c.23 is provided at the base of the claw portion 22.
c' is provided so that the claw portion 22 has elasticity. Each protrusion 23-1, 23-2, 23-3 extends in the same direction as the prism 21, 21', but its length is shorter than that of the prism 21, 21'. They are formed in different levels without overlapping in the vertical direction. Furthermore, to be more specific, an additional section is added between the virtual extension surface of the side wall of each protrusion 23-1, 23-2, 23-3 formed by the notches 23a, 23b and the virtual extension surface of the side wall of the square column 21, 21'. The gap is approximately the same as the plate thickness of the contact spring 13'. In this way,
The additional contact spring 13' is provided, for example, along the side wall of the protrusion 23-1 and the side wall of the prism 21, and as a result is held between the two side walls at different levels. That is, the square pillars 21, 21' have a function as a mounting member to the hook frame 14 and a function as a holding member for the additional contact spring 13'. Note that a notch 23-- is provided in the lower plate 23' so that the lower end of the additional contact spring 13' held in this way, which becomes the soldered part, can be extended below the insulating block 20. 1' is provided. In addition, notches 24 are provided in the side walls of the square columns 21, 21', and a cut-out 13a' (Fig. 1) is provided in the additional contact spring 13' for this to prevent the contact spring from coming off after being clamped. I have to. Such a block shape can be easily obtained by molding plastics or the like.

When adding contact springs using this insulating block 20, first push each additional contact spring 13' into the insulating block 20 from the front end side until the cut and raised part 13a' falls into the notch 24 and fix it. do. Next, this additional contact spring 13'
The installation is completed by, for example, aligning the groove 16a of the hole 16 with the protrusion 21a of the prism 21 and pushing the insulating block 20 into which the insulating block 20 is assembled until the claw part 22 is hooked on the hook part 17.

Here, three additional contact springs 1 are mounted on the mounting surface of the insulating block 20 on the hook frame 14.
3' is provided, and an arcuate hole 19 provided on the same surface provides an operating piece 12a.
An operating piece 12a' for an additional contact spring integrated with the converter 12 on the opposite side protrudes, but in the present invention, by fitting the grooves 16a, 16a' and the protrusions 21a, 21a', Protrusion 1 to prevent horizontal displacement
8 and the actuating piece 12a' can be reliably positioned. Further, the hook portion 17 and the claw portion 22 can completely prevent the insulating block 20 from falling off from the switch main body 10. When removing the insulating block 20 from the switch main body 10, the claw portions 22 may be expanded laterally.

FIG.
As shown in the figure. In this embodiment, the central additional contact spring is displaced from side to side in response to the rotation of the operating piece 12a' as the foot lever 11 is moved up and down, thereby switching the contacts open and closed.

As explained above, according to the present invention, extra space is not occupied when there is no need to add contact springs, and additional contact springs can be attached to the main body of the switch with a simple structure and assembly process. Not only can it be reliably positioned and fixed against the
An extension structure is provided that can achieve the purpose with a minimum amount of space depending on the type of telephone or the functions to be added.

That is, the insulating block 20 is not limited to the shape shown in the drawings, and the shape of the insulating block 20 is
0 can be assembled, and then changed according to the configuration of the additional contact spring. Note that the structure of the hook switch body in which the shape of the hole 16 in the hook frame 14 drives the additional contact spring is not limited to that shown in the drawings.

[Brief explanation of the drawing]

FIG. 1 shows an exploded perspective view of an embodiment of the contact spring extension structure according to the present invention, FIG. 2 is a side view of the switch body shown in FIG. This is a perspective view of the insulating block used in the embodiment shown in the figure, and FIG. 4 is a side view of the main body of the switch after completion of the extension assembly, as viewed from the extension contact spring 13' side. The names of the main reference numbers in the drawings are as follows: 10:
Foot switch body, 11: Foot lever, 1
2: Converter, 13, 13': Contact spring, 14: Hook frame, 20: Insulation block for expansion, 2
2: Claw part.

Claims (1)

[Scope of utility model registration request] The converter 12 includes a hook frame 14 and a converter 12 provided on the hook frame so as to be rotated by the vertical movement of the hook lever 11 and having a first operating piece 12a protruding from a first side wall of the hook frame. In a telephone hook switch in which a contact spring 13 provided along the side wall of the first hook frame is opened and closed by one actuating piece, a second actuating piece 12a' is attached to the converter, and a second actuating piece 12a' is attached to the converter; Provided so as to protrude from a second hook frame side wall 14-1 opposite to the frame side wall,
A square hole 16 is provided in the lower part of the side wall of the second hook frame.
At the same time, a hook part 17 is provided on each of the third and fourth hook frame side walls adjacent to the second hook frame side wall, which have a height corresponding to the square hole. An insulating block 20, which has a fitting protrusion and claw parts 22 on both sides of the protrusion that engages with the hook part, as well as a plurality of holding parts for contact springs 13' to be added, can be freely attached to and detached from the hook frame. The protruding portion of the insulating block is composed of several prismatic protrusions 21', 21' extending from the center of one end surface of the insulating block, and the one end surface has a protrusion near the upper edge thereof. The prismatic projection has several protrusions 23-1, 23-2, 23-3 that are shorter than the prismatic projection and extend parallel to and at different levels without overlapping in the vertical direction. The clamping part is formed by two side walls with different levels, one on the base side of the protrusion and the other on the side wall of the protrusion, and when the insulating block is attached to the hook frame, the clamping part is used to hold the insulating block upright. A structure for adding a contact spring to a telephone hook switch, characterized in that the added contact spring extends to a position corresponding to the second operating piece protruding from the side wall of the second hook frame.