JPH0224176Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field This invention relates to a diode polarity switching switch that can switch the wiring between the anode and cathode of a diode element by operating the switch.

(b) Prior art and its drawbacks When it was necessary to switch the polarity of high-voltage direct current in an electrostatic precipitator, etc., conventionally, the wiring between the anode and cathode of the diode element was manually reconnected each time. For this reason, the polarity switching operation is extremely troublesome, and is also extremely dangerous since there is a risk of electric shock to the operator if the operator forgets to turn off the power.

(c) Purpose of the invention This invention is a diode that improves work efficiency when switching the polarity of high-voltage direct current and improves work safety by housing the diode element and toggle switch in an insulated housing. This provides a polarity changeover switch.

(d) Structure and effect of the invention In order to achieve the above-mentioned purpose, this invention has a diode element embedded in the lower end of the insulating housing, and movable contacts at both ends provided in the front and rear of the insulating housing. There are two movable contact pieces, a swinging lever with an operating end protruding from the upper stage of this insulating housing, and the swinging lever is slidable in the thrust direction below, and the lower end is attached to the top surface of the movable contact piece. A slider that locks and moves this movable contact piece in a seesaw manner as the swinging lever swings, and a slider that corresponds to each movable side contact of the movable contact piece and operates in a seesaw manner as the movable contact piece moves in a seesaw manner. A toggle switch is composed of four fixed side contacts that open and close the contacts, and the four fixed side contacts of this toggle switch are connected diagonally to each other, and two sets of fixed side contacts are connected to each other along these diagonals. Both terminals of the diode element are connected to the contacts, respectively, and a common terminal that is always connected to the movable contact piece of the toggle switch is made to protrude outside the insulating housing as a connection terminal.

The diode polarity changeover switch of this invention, constructed as described above, allows you to easily change the wiring between the anode and cathode of the diode element by operating the toggle switch. In addition to increasing work efficiency, there is no need to directly touch the electrodes or terminals, making work safer.

(e) Embodiments Hereinafter, embodiments of this invention will be described with reference to the drawings.

Fig. 1 is a cross-sectional front view of a diode polarity selector switch which is an embodiment of this invention, Fig. 2 is a cross-sectional plan view of the diode polarity selector switch, and Fig. 3 is a cross-sectional plan view of the diode polarity selector switch. A cross-sectional side view, FIG. 4 is an electric circuit diagram of a polarity changeover switch of the same diode, and FIG. 5 is an explanatory diagram showing the positional relationship between a movable contact piece and a fixed side contact in the polarity changeover switch of the same diode.

This diode polarity changeover switch is composed of an insulating housing 1, a diode element 2, and a toggle switch 3.

The insulating housing 1 includes an outer box 4 made of ABS resin,
Inner box 5 and diode element storage box 6 are 3
It is a combination of boxes. The diode element 2 is a semiconductor rectifier having both an anode and a cathode terminal, and the diode element storage box 6
It is filled with epoxy resin and embedded inside.
This diode element storage box 6 is fitted into the lower end of the inner box 5. The inner box 5 is provided with two front and rear partition plates 7, 7 above the diode element storage box 6 fitted into the lower end, and by covering the outer box 4 from above, the inside of the insulating housing 1 can be moved back and forth. It is divided into three blocks: and the center. Outer box 4
is box-shaped with an open lower end, and has an opening 8 at the center of the upper end, and a plurality of grooves 9 extending in the direction of both ends at the front and back of the back surface of the upper end. Also,
A slider 10 also made of ABS resin is arranged on the inner box 5 within the outer box 4. This slider 1
0 has a protrusion 11 provided at the upper center protrude from the opening 8 of the outer box 4, and a plurality of grooves 12 provided at the front and back of the upper end in the direction of both ends are engaged with the grooves 9 on the back surface of the upper end of the outer box 4. , so that it can slide along this groove 9 toward both ends.

The toggle switch 3 includes two movable contacts 15 having movable contacts 13 at both ends and a common terminal 14 in the center, and a swinging lever 1 with a slider 16 below.
7 and four fixed side contacts 18. The movable contact piece 15 is a plate made of brass, and both ends of the movable contact piece 15 are made of the same material as the movable contacts 13, 13, respectively.
The nearby arms are bent upwards and curved.
These two movable contact pieces 15 are arranged in the front and rear blocks in the insulating housing 1, respectively, so that both ends can move in a seesaw manner with the common terminal 14 as a fulcrum. The swing lever 17 is fitted onto a shaft 19 provided in the inner box 5 of the insulating housing 1 and is provided to swing toward both ends using the shaft 19 as a fulcrum. It fits into the projection 11 and projects from the upper end of the insulating housing 1. The slider 16 is provided below the swing lever 17 so as to be able to slide freely in the thrust direction of the slider 16 while being biased downward by a spring 21. The lower end of the slider 16 is engaged with the upper surface of the movable contact piece 15, and as the swing lever 17 swings, the working contact piece 15 is moved in a seesaw manner. 4 fixed side contacts 1
Reference numeral 8 denotes each movable side contact 1 of the movable contact piece 15 below both ends of the front and rear blocks in the insulating housing 1.
3 are embedded in the diode element storage box 6, respectively, and open and close the contact with the movable side contact 13 in accordance with the see-saw movement of the movable contact piece 15. These four fixed side contacts 18 are connected to each other diagonally within the diode element storage box 6, and the two sets of fixed side contacts 18 connected diagonally are connected to both ends of the anode and cathode of the diode element 2. Each child is connected. In addition, a common terminal 14 that is always connected to the movable contact piece 15
is extended and protrudes from the lower end of the insulating housing 1 as a connection terminal.

A photoelectric switch 22 is provided in the central block within the insulating housing 1, and a shielding plate 23 made of a fan-shaped baking plate that swings together with the swinging lever 17 is provided to block the light from the photoelectric switch 22. It is being And this shielding plate 2
3 is provided with two holes 24, 24 through which light from the photoelectric switch 22 passes only when the swing lever 17 is at both ends. Therefore, in the photoelectric switch 22, light is blocked from the time the swing lever 17 starts swinging until the one movable contact 13 and the fixed contact 18 are separated, and the other movable contact 18
Immediately after the contact 3 and the fixed contact 18 are closed, light will be transmitted again. And this photoelectric switch 22
is connected to a circuit breaker provided in the power supply circuit to constitute a protection switch, and is configured to shut off this circuit breaker while the light is shut off.

The diode polarity changeover switch of this invention constructed as described above has an electric circuit as shown in FIG. The wiring between the anode and cathode of the diode element 2 can be switched.

Further, at this time, the operator does not need to directly touch the power supply or terminals, and the creepage distance from the movable contact piece 15 to the protrusion 11 of the slider 10 is the same as that between the outer case 4 and the slider 10. Since the grooves 9 and 12 are very long, the insulation is sufficient and the work can be carried out extremely safely.

Furthermore, as shown in FIG. 5, since the arm portion of the movable contact piece 15 is curved, when the movable contact piece 15 is straight as shown by the two-dot chain line, the arm part of the movable contact piece 15 is lower than the movable side contact 13. There is no fear that a portion close to the contact point 18 will be formed and a discharge will occur between that portion.

Further, since the power supply circuit is provided with a protection switch, when the movable contact 13 and the fixed frost contact 18 are separated or closed, the power is cut off, thereby preventing damage to the contacts. In addition, the inside of the insulating housing 1 is divided into three blocks by the partition plate 7 of the inner box 5, and two movable contact pieces 15 and a photoelectric switch 22 are arranged in each block, so that the creepage distance can be reduced for insulation. You can take enough.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional front view of a diode polarity selector switch which is an embodiment of this invention, Fig. 2 is a cross-sectional plan view of the diode polarity selector switch, and Fig. 3 is a cross-sectional plan view of the diode polarity selector switch. A cross-sectional side view, FIG. 4 is an electric circuit diagram of a polarity changeover switch of the same diode, and FIG. 5 is an explanatory diagram showing the positional relationship between a movable contact piece and a fixed side contact in the polarity changeover switch of the same diode. DESCRIPTION OF SYMBOLS 1... Insulating housing, 2... Diode element, 3... Toggle switch, 13... Movable side contact, 14... Common terminal, 15... Movable contact piece, 16
... Slider, 17 ... Swing lever, 18 ... Fixed side contact, 22 ... Photoelectric switch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A diode element is embedded in the lower end of an insulating housing, and two movable contacts having movable contacts at both ends are provided inside the insulating housing at the front and rear, respectively. A swing lever is provided with an operating end protruding from the upper stage of the insulating housing, and the swing lever is slidable in the thrust direction below the swing lever. A slider that operates the movable contact piece in a seesaw manner as the movable contact piece moves, and four sliders that correspond to each movable side contact of the movable contact piece and open and close the contacts as the movable contact piece moves in a seesaw manner. A toggle switch is configured with the fixed side contacts, and the four fixed side contacts of this toggle switch are connected diagonally to each other, and both terminals of the diode element are connected to the two sets of fixed side contacts connected diagonally. A diode polarity changeover switch characterized in that a common terminal which is connected to each other and which is always connected to a movable contact piece of the toggle switch is made to protrude outside the insulating housing as a connection terminal. (2) The diode polarity changeover switch according to claim 1, wherein the arm portion of the movable contact piece in the toggle switch near the movable contact is curved in a direction away from the fixed contact. (3) A shielding plate interlocked with the induction lever in the toggle switch, a photoelectric switch whose light is blocked by the shielding plate, and a photoelectric switch that is activated when one movable contact and fixed contact on the shielding plate are separated. A protective switch is provided in the power supply circuit, consisting of a hole opened at a position facing the photoelectric switch, and a hole opened at a position facing the photoelectric switch when the other movable side contact and fixed side contact are closed. A diode polarity changeover switch according to claim 1 or 2, which has been registered as a utility model. (4) Inside the insulating housing, two partition plates are provided that face the entire see-saw operating range of the movable contact piece, dividing the inside of the insulating housing into three blocks: front, back, and center. 4. A diode polarity change-over switch according to claim 3, which is a registered utility model, wherein said movable contact pieces are arranged respectively, and said protection switch is arranged in a central block.