JPH0650910Y2 - switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a low load operation type switch such as a micro switch, and more particularly to a switch having a built-in diode.

<< Prior Art >> For example, in a vending machine or the like, a low load operation type switch is used to confirm payment of money or supply of goods. This switch is arranged together with other circuit components.
Further, in other circuit parts, a diode is used to prevent backflow. In this case, in order to simplify other circuits, the applicant of the present application has previously proposed a switch in which a diode is arranged in the switch.

FIG. 3 shows an example of a switch having such a diode arranged therein.

In the figure, a switch 1 is a push button 3 in a case 2,
The fixed terminals 4 and 5, the common terminal 6, the bracket 7, the movable piece 8, the reversing spring 9, the fixed contacts 10 and 11, the movable contact 12 and the diode 13 are arranged.

The common terminal 6 includes a first common terminal 6a press-fitted in the fitting groove 2a of the resin case 2 and a fitting groove 2b of the case 2.
It is divided into a second common terminal 6b which is press-fitted and fixed to the first common terminal 6a and the second common terminal 6b, and a diode 13 is interposed between the first common terminal 6a and the second common terminal 6b. That is, the first common terminal 6a and the second common terminal 6b have end portions 6c and 6d arranged in parallel on the same plane, as shown in the enlarged view of the essential part in FIG. The different poles of the diode 13 are fixed to the end portion 6c6d by soldering. Further, for fixing the diode 13 by soldering, the first common terminal 6a and the second common terminal 6b are fitted into the fitting grooves 2a and 2b, respectively.
It is done before press fitting and fixing. Then, the first common terminal 6a, the second common terminal 6b, and the diode 13 which are integrated by being fixed by soldering are simultaneously assembled.

<Problems to be solved by the device> However, with the diode 13 fixed by soldering,
In the structure in which the first and second common terminals 6a and 6b are incorporated, the soldered portion may be deformed when assembled, or the soldered portion may be broken. Therefore, there was a problem in terms of reliability. In addition, since it is necessary to pay attention to breakage when assembling, workability is poor and there is a problem in automation.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a switch having a structure that can be easily assembled, can be easily automated, and can improve reliability. .

<Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention divides a common terminal into which a movable piece that can be switched to a fixed contact terminal is swingably mounted and divides a diode between them. A switch that is housed in a case by interposing in series,
A fitting groove into which each of the two divided common terminals is press-fitted and fixed is provided in the case, and notches are provided at the respective common terminals so as to face each other, and V is located between the notches. A groove is formed in the case, a leadless diode is inserted and fixed in both the notches and the V groove, and the common terminal is electrically connected through the leadless diode.

<< Embodiment >> An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows the configuration of a switch according to an embodiment of the present invention.

In the figure, a switch 20 includes a case 21, a push button 22,
Fixed terminals 23, 24, common terminal 25, movable piece 26, reversing spring 2
7, fixed contacts 28, 29, movable contact 30, receiving plate 31, leadless diode 32 and the like.

Further, the case 21 has a recess 33 formed by providing an opening on one side surface, a guide groove 34, and fitting grooves 35, 36, 37, 38, 39.
And are provided and integrally molded with a resin material. The opening on the one side surface is closed by a cover 50 (see FIG. 2) after incorporating other components.

The push button 22 has a stopper 22 at one end and is integrally formed of a resin material. Then, the push button 22 has a guide groove 34 with the stopper 22a positioned in the recess 13.
It is slidably arranged inside, and the amount of protrusion from the case 21 is regulated by the contact between the stopper 22a and the hole edge in the guide groove 34.

Next, the fixed terminal 23 and the fixed terminal 24 are made by press-molding a conductive material such as brass. Then, the fixed terminal 23 is positioned by press-fitting and fixing the middle portion in the fitting groove 35, and by this positioning, one end of the fixed terminal 23 is extended into the recess 33 and the other end is outside the case 21. It is in the state of being derived to. On the other hand, the fixed terminal 24, the intermediate portion is press-fitted and fixed in the fitting groove 36 and arranged substantially parallel to the fixed terminal 23, one end extends into the recess 33, the other end of the case 21. It has been outsourced. Also,
The fixed contacts 23 and the fixed terminals 24 extending into the recesses 33 have fixed contacts 2 made of, for example, silver (Ag) at the tip portions thereof.
8 and 29 are fixed facing each other.

The common terminal 25 is divided into a first common terminal 25a and a second common terminal 25b, which are each formed by press-molding a conductive material such as brass, and the first common terminal 25a and the second common terminal 25a. The leadless diode 32 is interposed between the terminal 25b and the terminal 25b.

More specifically, the first common terminal 25a includes a support portion 40
And an upper support portion 41 bent upward from one end of the support portion 40 at a substantially right angle, and a lower support portion 42 bent downward at a substantially right angle from the other end of the support portion 40. Further, the lower support portion 42 is further obliquely bent outward at an intermediate portion to form a first mounting portion 46 of the leadless diode 32. Then, the first common terminal 25a is fitted and fixed in the recess 33 of the case 21 by press-fitting the upper support portion 41 into the fitting groove 39 and the lower support portion 42 into the fitting groove 38, respectively.

On the other hand, the second common terminal 25b is integrally formed with a terminal portion 43 led out to the outside of the case 21 and a support portion 45 bent from one end of the terminal portion 43 at a substantially right angle. The portion 45 is press-fitted into the fitting groove 37 and attached and fixed to the case 21. The supporting portion 45 is further bent obliquely inward at an intermediate portion to form a second mounting portion 47 of the leadless diode 32.

Next, the leadless diode 32 interposed between the first common terminal 25a and the second common terminal 25b is the first common terminal.
The first mounting portion 46 of 25a and the second mounting portion 47 of the second common terminal 25b are arranged so as to be bridged. Further, in the portions of the first mounting portion 46 and the second mounting portion 47 where the leadless diode 32 is arranged, the portion on the side corresponding to the first mounting portion 46 is representatively shown in FIG. Further, cutout portions 42a, 43a formed by cutting a little larger than the diameter dimension of the leadless diode 32 are provided. On the other hand, on the case 21 side, a V groove 44 is provided between the notches 42a and 43a so as to correspond to the notches 42a and 43a. The notches 42a, 43a and the V groove 44 are set so that the leadless tire 32 arranged in this portion is set in the case 21 as shown in FIG.
The leadless diode 32 is connected to the first common terminal 25a.
And the second common terminal 25b are arranged after being attached to the case 21, respectively, and the first common terminal 25b is soldered.
a and the second common terminal 25b. Further, a resin-based adhesive (not shown) or the like flows in from above the connection and is further fixed.

Next, the receiving plate 31 is formed by pressing a metal plate material such as brass,
It is formed in a substantially L shape as a whole. One end is arranged in contact with the lower surface of the push button 22, and the other end is freely engaged with a part of the first common terminal 25a.

The movable piece 26 is formed by pressing a metal plate material such as brass,
The rear end side is freely engaged with the base 31. Further, the front end side is arranged between the common terminal 23 and the common terminal 24, and the movable contact 30 is arranged at the tip thereof in a state corresponding to the fixed contact 29.

The reversing spring 27 is press-molded from a metal plate having a spring property such as beryllium copper. Then, the intermediate portion is bent to be curved, one end is freely engaged with the front end side of the movable piece 26, and the other end is freely engaged with a part of the first common terminal 25a.

The switch 20 configured as described above is a pushbutton from the outside.
When 22 is not pushed, the movable piece 26 is
It is pivotally displaced counterclockwise by the urging force of the reversing spring 27 with the engaging portion with 26 as a fulcrum. And the movable contact
30 and the fixed contact 28 are in contact with each other. Therefore, in this state, the common terminal 25 and the fixed terminal 23 are electrically connected, and the common terminal 25 and the fixed terminal 24 are not electrically connected.

Next, when the push button 22 is pressed and one end side of the receiving metal 31 is displaced downward, the one end side of the movable piece 26 moves downward together with the receiving metal 31. Then, when this movement exceeds a preset operation fulcrum of the reversing spring 27, the movable piece 26 moves downward with quick action, and the movable contact 30 oscillates until it comes into contact with the fixed contact 29. To be done. As a result, the movable contact 30 separates from the fixed contact 28 and is switched to contact with the fixed contact 29. Therefore, the common terminal 25 and the fixed terminal 24 are electrically connected, and the common terminal 25 and the fixed terminal 23 are not electrically connected.

Then, when the pressing force applied to the push button 22 is released again, the movable piece 26 is displaced upward together with the push button 22 with a quick operation by the urging force of the reversing spring 27 and the base 31. As a result, the movable contact 30 is separated from the fixed contact 29 and the fixed contact
It is switched to contact with 28 and returned.

Therefore, in the switch configured as described above, the common terminals divided into the first common terminal 25a and the second common terminal 25b are press-fitted and fixed to the case 21, respectively, and then the leadless diode 32 is connected to the two common terminals. It is attached to 25a and 25b. As a result, when the first common terminal 25a and the second common terminal 25b are press-fitted and fixed to the case 2, the leadless diode 32 is not yet attached, and therefore the deformation or breakage in the connection portion with the leadless diode 32 is caused. Each common terminal 25a, 25b can be attached without considering the above. Further, since the leadless diode 32 is attached after the common terminals 25a and 25b are assembled, the attachment can be performed reliably.

<< Effects of Device >> As described above, according to the switch of the present invention,
Since the first common terminal and the second common terminal, which are arranged via the diodes, are individually attached to the case and then the diodes are attached, the work of assembling each common terminal and the work of assembling the diodes are easy. Therefore, automatic assembly becomes easier. Further, the respective common terminals, the diode and the like can be surely assembled in a predetermined state. As a result, the cost can be reduced and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an internal structure of a switch according to the present invention with a cover removed, FIG. 2 is an enlarged sectional view of a portion corresponding to line AA in FIG. 1, and FIG. 3 is a conventional switch. FIG. 4 is a front view showing an example of the internal structure of FIG. 3 with the cover removed, and FIG. 4 is an enlarged sectional view corresponding to the line BB in FIG. 20 …… switch, 21 …… case, 23, 24 …… fixed terminal, 2
5a ... first common terminal, 25b ... second common terminal, 26 ...
… Movable piece, 27 …… Inversion spring, 32 …… Diode, 37,3
8,39 …… Mating groove, 42a, 43a …… Notch, 44 …… V
groove.

Claims (1)

[Scope of utility model registration request] 1. A switch in which a movable terminal that can be switched to a fixed contact terminal is swingably attached to a common terminal, and a diode is interposed in series between the common terminals and housed in a case. There is a fitting groove for press-fitting and fixing each of the two divided common terminals, and notches are provided to face each of the common terminals, and between the notches. A V-groove located on the case is formed in the case, a leadless diode is inserted and fixed in both the notches and the V-groove, and the common terminal is electrically connected through the leadless diode. switch.