JPS5990318A - Switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switch having a movable contact and an identification contact, such as a relay or a microswitch.

An arc occurs when the movable contact and the identified contact of the switch separate and break. This arc damages the contact points between the movable contact and the fixed contact. This damage spreads rapidly as the circuit is repeatedly turned on and off.
Contact failure occurs.

Also, if the contact points of the movable contact and fixed fluorescent point are damaged,
Since both contacts come into contact only locally, they generate abnormal heat, which causes both contacts to fail.

An object of the present invention is to provide a switch that solves the above-mentioned technical problems, suppresses the occurrence of arcing as much as possible, and prevents damage to the fixed contacts and the fixed contacts.

FIG. 1 is a cross-sectional view of one embodiment of the present invention.

One end of the one-way fixed contact 6 of the fixed body 2 is erected on the base 1 made of an electrically insulating material, with one end protruding outside the base 1 and the other end protruding inside the base 81. One end of fixed terminal 4゜5 is base 8
1 and the other end protrudes into the inside of the base 1,
It will be erected. The fixed contact 2 consists of a fixed contact 6 and a fixed contact 7, and the fixed contact 7 is attached to the identification contact 6. The bottom of the support 8 is rotated to the base 1 by screws 24,
A core 9 is fixed in the middle of the support 8. Core 9 has
A coil IO is wound. On the support body 8, the IJ contact 14 of the driving body 11 is attached to a mounting member 14 made of paulownia wood and a rIJ made of a strong IJI contactor 14.
It is pivoted around a fulcrum 16 via a larva piece 15 so that the valley λ can be freely supported. The arc section 15 is connected to the core 1 by the spring 17.
It is spring-biased in the direction away from 0.

0J'■νJWa point 13 is fixed to the Machisaku contactor 12.

One end of the retractable lead wire 18 is connected to the truncation contact 12 inside the mounting member 14 . Lead green 18 and others'i
@Miyako is connected to the informal offer terminal 4. When the coil 10 is not energized, Of I! as shown in FIG. 17 pieces 15
is separated from the core 9, so that the movable contact 13 and the fixed contact 7 come into contact and electrically pass through each other. Therefore, the fixed terminal 4 and the 11M regular holiday 2 are in poor electrical communication status. A coil 10 is connected to the 1-white fixed pane 5. An outer envelope 19 is provided on both the fixed body 2 and the fixed terminal 4.

The outer envelope 19 may be made of an electrically insulating material, or may be made of gold stripes such as iron, and is made of a material with a large heat capacity, and has a cylindrical outer shape. The vertical section of this outing 1 salary 19 is
This is shown in FIGS. 2 and 3. An arc cooling protrusion 21 protruding inward is provided inside the outer envelope 19. The outer envelope 19 is embedded and fixed in the base 1 by the mounting projections 20. The cooling protrusion 21 is for increasing the cooling area. A cover 25 covering these members is removably housed in the base 1.

Ir! +l constant contact 7 and r': i'f Hid3i point 13
are in contact with each other, and the fixed body 2 and the first identification terminal 4 are electrically connected. In this state, a load current is flowing through the identification body 2 and the fixed terminal 4. When the coil 10 is excited at this time, the iTmJ piece 15 is attracted to the core 9 against the spring force of the spring 17, and the fixed contact 7 and the movable contact 13 are separated, and at that moment, the An arc 22 as shown is generated. This arc 22 is cooled by an arc cooling projection 21 provided inside the envelope 19, and the internal contact 7 and the rifu'J contact 13 are protected from the heat of the arc 22. .

The structure of an envelope 22 according to another embodiment of the present invention is shown in FIGS. 5 and 6. The outer envelope 22 has a cylindrical shape and is provided with a plurality of through holes 23 . This through hole 23 is for discharging the heat of the arc as described above. Mounting member 2
6 is fixed by embedding the outer envelope 22 in the base 1.

FIG. 7 shows an example of yet another embodiment of the present invention.

A base 71 made of electrically insulating material has a fixed body 720, a constant contact 76 and +I! One end of the jl constant terminals 73 to 75 is provided outside the base 1, and the other end is provided so as to protrude inside the base 1. The internal body 72 is composed of an h-constant contact 76 and a fixed contact 77. The fixed contact 77 serves the same purpose as the tip of the fixed contact 76. For the informal offer terminal 73, caulk 78 with 1jlJIJ
A J body 79 is joined. The movable body 79 has a spring force and is composed of a movable contact 80 and a movable contact 81 which have an electrical property. The movable contact 81 is fixed at the tip of the MT mJ contact 80.

The bottom of the support 82 is fixed to the base 71 with screws 83,
One core 84 is fixed in the middle of the support 82 . The support body 82 is provided with aT moving pieces 86 made of a ferromagnetic material and pivoted around a fulcrum 85 so as to be freely displaceable. part a
T 1111 piece 86 is spring biased away from core 84 by spring 87 .

An outer enclosure 89 is internally defined below the 0J'+ section 86 by a mounting protrusion 88 as shown in FIG. A coil 90 is wound around the core 84 . The covers covering these walls are removably fixed to the base 71. Identification terminals 74.75V'i are connected to both ends of the coil 90, respectively.

When the coil 90 is not energized (as shown in FIG. 7), the outer envelope 89 presses the movable contact 80 of the dividing body 79 to the left by the bias of the spring 87, and connects the movable contact 81. Same day off 7
The identification contact 77 of No. 2 is separated from the identification contact 77 of No. 2. Therefore, the fixed body 72 and the fixed terminal 73 are electrically crystallized. Next, when the coil 90 is energized, the machinability 86 is attracted to the core 84, the envelope 89 moves to the right, and the envelope 89 becomes 0.
Move away from the T auxiliary contact 80. Therefore, “f #J 4
The X point 81 and the identification contact 77 come into contact, and the fixed terminal 72 and the fixed terminal 73 are electrically connected. In this state, a load current is flowing through the fixed terminal 72 and the fixed terminal 73. At that time, the coil 90 is demagnetized and the town v'J
When the contact 81 and the fixed contact 77 are separated from each other, an arc as described above is generated between them. The fear of that arc is the 8th
It is cooled by the arc cooling protrusion 92 of the outer H hole 89 as shown in the figure. Therefore, the arc time and arc energy are reduced, and the pre-circuit contact 81 and the stationary contact 77 are protected from the heat of the arc.

The invention can also be implemented in connection with microswitches and the like. In such a case, the configuration may be such that an external force is applied to the 0J pancreas by an actuator or the like.

As described above, according to the present invention, the life of the contact can be extended by providing an outer curved body that suppresses the arc radius ζ that occurs when the Loe collar contact and the fixed contact move into and out of contact. It is also possible to miniaturize the contacts of large-scale switches and reduce the cost.

[Brief explanation of the drawing]

Figure 1 shows an example of Kazufuku of the present invention, and Figure 2 shows one outside.
3 is a vertical cross-sectional view of the outer envelope 19, FIG. 4 is a diagram for explaining an arc, and FIG. 5 is a perspective view of the outer envelope 22 of another embodiment of the present invention. FIG. 6 is a perspective view showing the vertical cross-section of the outer enclosure 22, FIG. FIG. 7 is a perspective view showing a cross section of an outer d body 89 in the example shown in FIG. 7.77...1! l Constant contact, 13.81... Retractable contact, ], 9, 22, 89... Outer curved body, 21.92
...Arc cooling protrusion, 23...Through hole agent Patent attorney Kei Nishi Part 1 Fig. 7 1 1 V20 Fig. 3 Fig. 4 Fig. 9 Fig. 5 Fig. 6 Fig. 6

Claims (3)

[Claims] (1) A switch whose fault is determined by providing an enclosure that surrounds the vicinity of the contact/separation position between the movable contact and the identified contact and is electrically connected to at least one of the contacts. (2) The switch according to claim 1', wherein the outer envelope has a protrusion projecting inward. (3) The switch according to claim 1 or 2, wherein the outer envelope has a through hole.