JPH09153318A - Changeover switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a changeover switch enabling a circuit board or the like to be effectively miniaturized without involving reduction of number of fuses and switches and without entailing deterioration of functions. SOLUTION: This changeover switch comprizes a board 11 having contact electrodes 11a, 11b on its inner surface side and equipped with at least a pair of terminals 11A, 11B connected thereto and installed so as to extrude to the exterior, a slider 13 equipped, on the opposite side to the contact electrodes 11a, 11b, with a pair of sliding conductors 13a, 13b sliding on the said contact electrodes 11a, 11b and also equipped with a knob 13A on the reverse side thereof, and a case 12 which houses the slider 13 therewithin, allows a knob 13A part of the slider 13 to project to the exterior so as to be slidable, and holds the board 11 in an integrated manner. And an overcurrent melting element 14, both end parts of which are connected electrically to the pair of sliding conductors 13a, 13b respectively, is provided in the slider 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a change-over switch, and more particularly to a change-over switch that houses an overcurrent protection means and is attached to a printed wiring board or the like for use.

[0002]

2. Description of the Related Art Conventionally, a fuse is generally used to prevent a circuit burnout accident due to an overcurrent.
Further, a DIP switch has been widely used conventionally for opening and closing a circuit. Many of the switches are usually turned on / off by an external operation. An example of the DIP switch used for opening and closing the circuit described above is
See, for example, Japanese Utility Model Laid-Open No. 10818/1992. This known example relates to a DIP switch for an evaluation jig,
At the same time, a plurality of fuses are equipped for each circuit to protect the circuit.

[0003]

However, as described above, since the fuse and the switch are conventionally provided separately, when the fuse and the switch are provided on the circuit board or the like, a mounting area corresponding to the number is required. I need. For this reason,
There has always been the inconvenience of increasing the size of the circuit board as the number of fuses and switches increases.

[0004]

It is an object of the present invention to improve the disadvantages of the conventional example, and particularly in a circuit board or the like requiring a fuse and a switch, the number of the fuse and the switch can be eliminated without omitting the fuse and the switch. It is an object of the present invention to provide a changeover switch that can effectively downsize the circuit board and the like without impairing each function of the switch.

[0005]

In order to achieve the above object, the invention according to claim 1 has a contact electrode on the inner surface side and is provided with at least a pair of terminals connected to the contact electrode and protruding to the outside. A substrate, a pair of sliding conductors on the side opposite to the contact electrode that abuts and slides on the contact electrode, and a slider on the opposite side with a handle, and the slider is housed inside. At the same time, a case is provided in which the handle portion of the slider is slidably projected to the outside and integrally holds the substrate. Then, the above-mentioned slider is equipped with an overcurrent fusing element (fuse) in which both ends are electrically connected to a pair of sliding conductors.

In the invention described in claim 1, for example, the state of FIG. 1 shows that the changeover switch 1 is on. In this state, one terminal 11A and the other terminal 11A
B is electrically connected to B via the pair of sliding conductors 13 a and 13 b of the slider 13 and the fuse 14. When an overcurrent flows in a circuit (not shown) connected to the terminals 11A and 11B, the fuse 14 immediately blows to cut off the current, thereby preventing the circuit from being burned and causing a circuit component. Etc. are protected.

According to the second aspect of the present invention, the above-mentioned slider is removably mounted in the case, and the above-mentioned overcurrent fusing element (fuse) is removably mounted in the above-mentioned slider. The composition is adopted. According to the second aspect of the present invention, in addition to the same operational effect as the first aspect of the present invention, the fuse can be replaced by the circuit capacity. This allows the switch portion to be used semi-permanently.

According to the third aspect of the present invention, the above-mentioned overcurrent fusing element (fuse) is provided with conductive holders at both ends thereof. The invention according to claim 3 has the same function and effect as the invention according to claim 2 described above, and can also incorporate a modified fuse or the like by the function of the cap holder.
This aims to achieve the above-mentioned object.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 indicates a changeover switch. The changeover switch 1 includes a substrate 11 made of an insulator and a case 12 also made of an insulator.

The substrate 11 has contact electrodes 11a and 11b of a predetermined size at both ends on the inner surface side (upper side in FIG. 1), and a pair of terminals 11 connected to the contact electrodes 11a and 11b and protruding to the outside.
Equipped with A and 11B. These terminals 11A and 11B are
It may be further divided into a plurality.

A slider 13 is disposed above the substrate 11 in FIG. The slider 13 is provided with a pair of sliding conductors 13a and 13b that abut and slide on the contact electrodes 11a and 11b described above, and a handle 13A is provided at the center opposite to the sliding conductors 13a and 13b. There is. Sliding conductor 13
a and 13b are made of a spring material having good conductivity such as phosphor bronze, and are provided in a V shape as shown in FIG. 1, and are housed in a case 12 described later in a state where an appropriate initial load is applied. ing.

In this case, the contact electrodes 11a and 11b have the sliding conductor 1 when the slider 13 is located at the right end portion in FIG.
When the slider 13 is located at the left end of FIG. 1, the other sliding conductor 13b is separated from the contact electrode 11b and is turned off (OF).
F) The length is set so as to be set to the state.

Further, as shown in FIG. 1, the case 12 is formed in a rectangular parallelepiped shape whose lower part is opened, and the above-mentioned substrate 11 is fixedly mounted in the opening at the lower end thereof. A handle 13A portion of the slider 13 is slidably projected to the outside from an elongated hole 12B formed at the center of the upper end of the case 12.

An overcurrent blowing element (fuse) 14 is provided in the slider 13 described above. The fuse 14 includes a pair of sliding conductors 13a and 13 described above.
The ends of b are individually connected. Here, the fuse 14 and the pair of sliding conductors 13a and 13b described above are
It does not necessarily have to be directly connected and may be electrically connected.

Next, the operation of the above embodiment will be described. FIG. 1 shows a state in which the changeover switch 1 is on. In this state, one terminal 11A and the other terminal 11B are electrically connected via the pair of sliding conductors 13a and 13b of the slider 13 and the fuse 14. When an overcurrent flows in a circuit (not shown) connected to the terminals 11A and 11B, the fuse 14 immediately blows to cut off the current, thereby preventing the circuit from burning and Protects circuit components connected to the.

Further, in FIG. 1, a virtual line (two-dot chain line)
Shows a state in which the handle 13A is operated and the slider 13 moves in the A direction, whereby the terminals 11A and 11B are released from each other.

Next, another embodiment will be described with reference to FIG.

The other embodiment shown in FIG. 2 is characterized in that the fuse 14 is detachably mounted.

That is, first, in order to detachably mount the slider 23 in the case 12, the substrate 21 is shown in FIG.
It is detachably attached to the opening at the lower end of the.
As shown in FIG. 2, the slider 23 includes an upper holding plate member 23E and a fixed plate member 23F screwed to the lower side thereof.
And a recess for accommodating the fuse 14 is provided in the center of each of the two plate-shaped members.

Cap holders 24A and 24B as conductive holders are fitted to both ends of the fuse 14. Then, the cap holders 24A, 2
The sliding conductors 13a and 13b held by the fixed plate member 23F are integrally connected to 4B. Other configurations are the same as those in the case of FIG. 1 described above.

In this way as well, the substrate 21 has the case 2 in addition to the same effects as the embodiment of FIG. 1 described above.
2 is detachably mounted, and the slider 23 is formed by two plate-shaped members screwed to each other, so that the fuse 14 can be freely mounted and detached.
It is possible to freely equip the fuses 14 of different standards according to the circuit capacity and the like, and it is possible to replace the blown fuses 14, and in this respect, it is possible to obtain a versatile changeover switch that is compatible with generalization.

[0022]

Since the present invention is constructed and functions as described above, according to the invention described in claim 1, since the overcurrent protection element is provided in the same case, it has an original opening / closing function. In addition, it is possible to protect the connection circuit from overcurrent, eliminating the need to equip the switch with an overcurrent protection element outside the switch case, and at this point the mounting area can be greatly reduced. It is possible to provide an unprecedented excellent changeover switch in which the circuit board and the like can be surely miniaturized by being equipped with.

Further, in the invention described in claim 2, in addition to having the same function and effect as the invention described in claim 1, the overcurrent protection element of different standard depending on the circuit capacity etc. can be freely replaced. In this respect, it is possible to provide an excellent changeover switch that can be equipped and can effectively cope with generalization as a multipurpose switch intended for circuit protection.

Further, in the invention described in claim 3, in addition to the same effect as the invention described in claim 2, the modified fuse can be incorporated by the operation of the cap holder.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another embodiment.

[Explanation of symbols]

 1 Changeover switch 11,21 Board 11A, 11B Terminal 11a, 11b Contact electrode 12 Case 13, 23 Slider 13A, 23A Handle 13a, 13b Sliding conductor 14 Switch as overcurrent protection element 24A, 24B As a conductive holder Cap holder

Claims (3)

[Claims] 1. A substrate having a contact electrode on an inner surface side thereof and having at least a pair of terminals connected to the contact electrode and protruding to the outside, and a substrate facing the contact electrode and sliding on the contact electrode. A slider having a pair of moving sliding conductors and a handle on the opposite side thereof, and the slider is housed inside and the handle portion of the slider is slidably projected to the outside. In addition, a case that integrally holds the substrate is provided, and an overcurrent fusing element having both ends electrically connected to the pair of sliding conductors is provided in the slider. Changeover switch. 2. The changeover switch according to claim 1, wherein the slider is detachably mounted in the case, and the overcurrent fusing element is detachably mounted on the slider. And the changeover switch. 3. The changeover switch according to claim 2, wherein the overcurrent fusing element is equipped with conductive holders at both ends thereof.