JPS6239559Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telephone switch.

In general, a telephone hook switch is widely used, and includes a hook button that is pressed down by the handset of the telephone, and a converter that operates in conjunction with the hook button to drive a card to open and close contacts. The contacts are given opening/closing combinations and, if necessary, their sequential operations. This resulted in disadvantages such as a complicated card shape and a large number of parts. Recently, a structure has been proposed in which the contact spring is directly driven by the foot lever, and a step is formed in the driving portion of the foot lever to provide sequential operation. However, it is not necessarily cheap or easy to assemble, as it requires a member with a complicated shape as a stopper for the contact spring.

The present invention has been devised in consideration of these points, and provides a hook switch that has a small number of parts, is easy to assemble, and can be configured to have a thin overall structure.

Hereinafter, the present invention will be explained in detail with reference to the embodiments shown in the drawings. FIG. 1 is a plan view of a switch which is an embodiment of the present invention, and some parts are shown with approximate lines for convenience of explanation. Figures 2 and 3 are cross-sectional views taken along lines A-A' and B-B' in Figure 1, respectively.
The figure shows the operation of a contact spring. Figure 5 is an exploded view.
FIG. 6 is a diagram showing the back side of the insulating plate.

Reference numeral 1 designates a foot lever, which is provided with an operating portion 1a on one side and a contact spring driving portion 1b on the other side.

2 is a base with two parallel side plates 2a and 2b and a terminal plate 2 configured to connect these at the bottom.
c is integrally formed, and the terminal plate 2c has terminal holes 2a, 2e for inserting the terminal portions 3a, 4a of the first contact spring group 3 and the second contact spring group 4, respectively.
A plurality of protrusions 2f for positioning the first contact spring group 4 are provided. Also, the side plates 2a, 2
Projections 2g and 2h, which serve as rotational fulcrums for the foot lever 1, are provided on the outside of the protrusions 2g and 2h, respectively, and the shaft holes 1c and 1d of the foot lever 1 are pivotally attached to these protrusions, so that the foot lever 1 can be rotated. Further, in order to apply a rotational bias force to the foot lever 1, locking portions 1e and 2i are provided on one side plate 2a of the base 2 and the corresponding side surface of the foot lever 1, respectively, and the tension spring 6 is configured to be pulled between the locking portions 1e and 2i. There is.
(See FIG. 1) Therefore, when the handset is removed, the operating portion 1a is pulled upward by the tension spring 6.

On the other hand, the first contact spring group 3 and the second contact spring group 4 have a first movable contact spring 3b and a first fixed contact spring 3c, and a second movable contact spring 4b and a second fixed contact, respectively. A spring 4c is provided, and the free ends of the first and second movable contact springs 3b, 4b are extended longer than the first and second fixed contact springs 3c, 4c, and the contact spring drive portion 1b of the foot lever 1 is provided with a spring 4c. configured to engage with. and,
First movable contact spring 3b and second fixed contact spring 4
The second movable contact spring 4b and the first fixed contact spring 3c are arranged to face each other with a spacing plate 5 in between. The spacing plate 5 is provided with a plurality of protrusions 2f for positioning the first contact spring group 3 and a terminal hole 5b for inserting the terminal portion 3a thereof, and also for second fixing of the second contact spring group 4. An extension portion 5c is formed corresponding only to the contact spring 4c, and the second fixed contact spring 4c abuts thereon by its own biasing force, thereby regulating its normal position. 1st
Further, an insulating plate 7 and a holding plate 8 are stacked on top of the contact spring group 3. The holding plate 8 has ears 8a and 8b.
are formed, which protrude slightly from notches 2a' and 2b' provided in both side plates 2a and 2b, into which the locking holes 9a and 9b of the clamp spring 9 are hooked, whereby the above-mentioned contacts springs 3, 4
etc. are fixed to the base.

Needless to say, after being fixed, the connecting portions 3d and 4d of the first and second contact spring groups 3 and 4 are cut off.

An extension part 7a extending from the free end side of the first contact spring group 3 is integrally formed on the insulating plate 7, and the extension part 7a corresponds to the first movable contact spring 3b and the first fixed contact spring 3c at the end part. A step part (see FIGS. 4 and 6) is provided, and the lower part 7a' of the step is provided with a first fixed contact spring 3c, and the higher part 7a'' of the step is provided with a first movable spring. 3b are in contact with each other by their own biasing force, thereby regulating their respective positions in normal conditions (when the handset is hung and the operating portion 1a of the foot lever 1 is pressed down).

That is, the first fixed contact spring 3c and the second movable contact spring 4b constitute a normally closed contact, and the second fixed contact spring 4c and the first movable contact spring 3b constitute a normally expanded contact. ing.

Now, when the handset is lifted and shifted from the normal state to the operating state, the foot lever 1 is rotated by the tension spring 6, the operating part 1a is pulled upward, and the contact spring driving part 1b is moved to the first movable contact spring 3.
b and the second movable contact spring 4b are pressed almost simultaneously. That is, the step 7a' for regulating the position of the first fixed contact spring 3c constituting the normally closed contact and the step 7a'' for regulating the position of the first movable contact spring 3b are selected. By doing so, it is possible to configure such that the normally closed contact operates (opens) first, and then the normally open contact operates (closes).
(See figure) In other words, sequential operations can be provided for opening and closing the contacts.

Therefore, as described above, it is sufficient to form the step of the extension portion 7a so that the first and second movable contact springs 3b and 4b are disposed on substantially the same plane.

As described above, according to the present invention, it is sufficient to provide a step on the insulating plate 7, so there is no need for a card with a complicated shape or a stopper, and the number of parts can be reduced, so the entire switch can be made inexpensive and thin. It can be configured as follows.

[Brief explanation of the drawing]

Figure 1 is a plan view of a switch that is an embodiment of the present invention, and Figures 2 and 3 are A in Figure 1.
4 is a diagram showing the operation of the contact spring, FIG. 5 is an exploded view, and FIG. 6 is a diagram showing the back side of the insulating plate. 1...foot lever, 2...base, 3,4...
Contact spring, 5... Spacing plate, 6... Tension spring, 7
...Insulating plate, 8...Press plate, 9...Clamp spring.

Claims (1)

[Scope of utility model registration request] a first contact spring group including a first movable contact spring and a first fixed contact spring; a second contact spring group including a second movable contact spring and a second fixed contact spring; The first and second contact spring groups are arranged to face each other, so that the first fixed contact spring and the second movable contact spring provide a normally closed contact, and the first movable contact spring and the second fixed contact spring provide a normally closed contact. a spacer plate disposed between the contact spring groups to form a normally open contact, and an insulating plate disposed above the first contact spring group;
and a foot lever provided with a driving part for driving the first and second movable contact springs, and the spacing plate is integrally provided with an extension part for regulating the normal position of the second fixed contact spring. At the same time, the insulating plate is integrally formed with an extension having a step for regulating the first movable contact spring and the first fixed contact spring at different normal positions. The free ends of the first and second movable contact springs are disposed on substantially the same plane, and the first and second movable contact springs are driven from the insulating plate side by the hook lever to open and close. A telephone switch characterized by the following features: