阅读说明：本技术 开关 (Switch with a switch body ) 是由 岩本大荣 于 2016-01-28 设计创作，主要内容包括：一种开关,包括：第一开关(100),具有第一固定接点(111)和第一可动接点(121)；以及第二开关(200),具有第二固定接点(211)和第二可动接点(221)。通过该第一固定接点(111)与该第一可动接点(121)接触,该第二固定接点(211)与该第二可动接点(221)接触,使得开关闭合。在该第一开关(100)与该第二开关(200)之间设置有磁铁(320)。(A switch, comprising: a first switch (100) having a first fixed contact (111) and a first movable contact (121); and a second switch (200) having a second fixed contact (211) and a second movable contact (221). The first fixed contact (111) is in contact with the first movable contact (121), and the second fixed contact (211) is in contact with the second movable contact (221), so that the switch is closed. A magnet (320) is disposed between the first switch (100) and the second switch (200).)

1. A switch, comprising:

a first switch having a first fixed contact and a first movable contact; and

a second switch having a second fixed contact and a second movable contact,

the first fixed contact is contacted with the first movable contact, the second fixed contact is contacted with the second movable contact, so that the switch is closed,

wherein magnets are provided at positions shifted outward from positions between a region between the first fixed contact and the first movable contact and a region between the second fixed contact and the second movable contact.

2. The switch of claim 1,

the switch includes a yoke formed in a U-shape,

the yoke is in close proximity to the magnet,

the first switch is located between one end of the yoke and the magnet,

the second switch is located between the other end of the yoke and the magnet.

3. The switch of claim 1,

the switch is a double-break switch.

Technical Field

The present invention relates to a switch.

Background

When the electrical device receives power supply from the power supply, the power supply and the electrical device are connected by the connector, and in this state, the power supply is performed by performing on/off control of the switch.

In recent years, as one of countermeasures against global warming and the like, it has been studied to supply high-voltage electric power using direct current even in power transmission in a local area. In the case of supplying high-voltage electric power using direct current, the loss of electric power in voltage conversion, power transmission, and the like is small, and it is not necessary to increase the thickness of the cable. In particular, information devices such as servers consume a large amount of power, and therefore such power supply is expected.

However, when the supply of such high-voltage power is controlled by the switch, an arc may occur between terminals in the switch. If such an arc occurs, each terminal may be destroyed by heat generated by the arc, and thus, a method of extinguishing the arc that occurs in a short time has been studied.

< Prior Art document >

< patent document >

Patent document 1: japanese patent laid-open publication No. 2013-41690

Disclosure of Invention

< problems to be solved by the present invention >

The method disclosed in patent document 1 is a method using a structure of a permanent magnet for extinguishing an arc generated, and one permanent magnet is provided for each set of contact points including a fixed contact point and a movable contact point. However, when the supply of high-voltage power is controlled, a switch having a plurality of contact groups, for example, a switch having two groups of contacts called a double break switch is used. In such a double break switch, if one permanent magnet is provided for each set of contacts, the number of permanent magnets corresponding to the set of contacts, that is, two permanent magnets are required, which disadvantageously increases the switch cost, increases the size, and increases the weight of the switch.

Therefore, a switch having a plurality of contact groups is required, which can extinguish an arc at low cost without increasing the size.

< solution to problem >

According to an aspect of the present invention, there is provided a switch comprising: a first switch having a first fixed contact and a first movable contact; and a second switch having a second fixed contact and a second movable contact, the first fixed contact being in contact with the first movable contact, the second fixed contact being in contact with the second movable contact, and the switch being closed, wherein a magnet is provided between the first switch and the second switch.

< effects of the invention >

According to one embodiment of the present invention, in a switch having a plurality of contact groups, an arc can be extinguished at low cost without increasing the size of the switch.

Drawings

Fig. 1 is a front view of the switch in embodiment 1.

Fig. 2 is a plan view of the switch in embodiment 1.

Fig. 3 is a sectional view of the switch in embodiment 1.

Fig. 4 is a sectional view of the switch in embodiment 1.

Fig. 5 is a circuit diagram provided with the switch in embodiment 1.

Fig. 6 is a plan view of another switch in embodiment 1.

Fig. 7 is a circuit diagram provided with the switch in embodiment 2.

Fig. 8 is a plan view of the switch according to embodiment 2.

Fig. 9 is a sectional view of the switch in embodiment 2.

Fig. 10 is a sectional view of the switch in embodiment 2.

Fig. 11 is a plan view of the switch according to embodiment 3.

Fig. 12 is a perspective view of a switch in embodiment 3.

Detailed Description

Embodiments of the present invention will be described below. The same components and the like are denoted by the same reference numerals, and description thereof is omitted.

The switch described in the present embodiment corresponds to a high voltage, but in the present embodiment, the high voltage does not mean "more than 750V dc" specified in the electrical equipment technical standard or "more than 1500V dc" specified internationally by the International electrical standards conference (IEC), but means a voltage exceeding a safe low voltage (less than 60V dc), that is, 60V or more.

[ embodiment 1 ]

A switch according to embodiment 1 will be described with reference to fig. 1 to 5. Fig. 1 is a front view of a main part of the switch in the present embodiment, fig. 2 is a plan view, fig. 3 is a sectional view of the first switch 100, and fig. 4 is a sectional view of the second switch 200.

The switch in the present embodiment is a switch called a double-break switch (double-break switch) having a first switch 100 and a second switch 200 as shown in fig. 1 to 4. The first switch 100 has a first fixed portion 110 and a first movable portion 120, and the second switch 200 has a second fixed portion 210 and a second movable portion 220.

In the switch of the present embodiment, the first fixed portion 110 is in contact with the first movable portion 120, and the second fixed portion 210 is in contact with the second movable portion 220, so that the switch is closed to supply power to the electronic device or the like. In a state where either the first switch 100 or the second switch 200 is not in contact, the switch is in an off state, and power is not supplied to the electronic device or the like.

The first fixing portion 110 has a first fixing contact 111 and a first fixing spring 112, and a first fixing portion external terminal 113 is connected to the first fixing spring 112. The second fixing portion 210 has a second fixing contact 211 and a second fixing spring 212, and a second fixing portion external terminal 213 is connected to the second fixing spring 212. The first movable portion 120 includes a first movable contact 121, a first movable plate 122, and a first movable spring 123, and a first movable portion external terminal 124 is connected to the first movable spring 123. The second movable portion 220 includes a second movable contact 221, a second movable plate 222, and a second movable spring 223, and is connected to a second movable portion external terminal 224.

The first movable plate 122 and the second movable plate 222 are both connected to a card (card) 310. Thus, by pressing the card 310, the one movable contact 121 and the second movable contact 221 can be moved downward. This allows first movable contact 121 to contact first fixed contact 111, and second movable contact 221 to contact second fixed contact 211. Thus, the switch in the present embodiment is closed.

In the switch of the present embodiment, a permanent magnet 320 for extinguishing an arc is provided between the first switch 100 and the second switch 200. More specifically, the permanent magnet 320 is provided between the portion where the first fixed contact 111 and the first movable contact 121 are arranged and the portion where the second fixed contact 211 and the second movable contact 221 are arranged. This allows a magnetic field to be generated in the region between the contacts of the first switch 100 and the region between the contacts of the second switch 200. By generating the magnetic field in the region between the contacts in this way, when an arc is generated between the contacts, the arc can be blown off, and the arc can be effectively extinguished.

As shown in fig. 5, the switch in the present embodiment is connected to the dc power supply 10 and the electronic device 20 as a load. The positive electrode of the dc power supply 10 is connected to the first movable contact 121, and the first fixed contact 111 is connected to the electronic device 20. Further, the negative electrode of dc power supply 10 is connected to second movable contact 221, and second fixed contact 211 is connected to electronic device 20.

By connecting the switch in the present embodiment to the dc power supply 10 and the electronic device 20 as shown in fig. 5, when the switch is closed, a current flows in the direction of the dotted arrow in fig. 2, 3, and 4. Specifically, a current flows from first movable contact 121 to first fixed contact 111 in first switch 100, and a current flows from second fixed contact 211 to second movable contact 221 in second switch 200. As shown in fig. 2, when the permanent magnet 320 is provided so that the first switch 100 side is an S pole and the second switch 200 side is an N pole, the magnetic field of the permanent magnet 320 is generated in the direction indicated by the arrow of the one-dot chain line in fig. 2. Accordingly, the arc can be blown off in the direction indicated by the arrow of the two-dot chain line, that is, in the first switch 100, the arc can be blown off in the direction in which the first movable spring 123 and the first fixed spring 112 are provided as viewed from the contact, and in the second switch 200, the arc can be blown off in the direction opposite to the direction in which the second movable spring 223 and the second fixed spring 212 are provided as viewed from the contact.

In the present embodiment, even in the double-break switch including the first switch 100 and the second switch 200, the arc generated between the respective contacts can be blown off by one permanent magnet 320. Therefore, a switch capable of extinguishing an arc can be obtained in a small size, light weight, and at low cost.

In the switch of the present embodiment, as shown in fig. 6, permanent magnet 320 may be provided at a position shifted outward (rightward in fig. 6) from the intermediate positions of first fixed contact 111, first movable contact 121, second fixed contact 211, and second movable contact 221. At this time, as indicated by the arrows of the two-dot chain line in fig. 6, the magnetic field acting at each contact point position is directed obliquely to the extending direction of the movable spring and the fixed spring. This makes it possible to blow off the arc generated in the first switch 100 in a direction not parallel to the direction of current flow in the first fixed spring 112 and the first movable spring 123, thereby easily extinguishing the arc. The arc generated in the second switch 200 can also be blown away in a direction that is not parallel to the direction along the second fixed spring 212 and the second movable spring 223. In fig. 6, the direction of current flow is indicated by a dashed arrow, the direction of the magnetic field generated by the permanent magnet 320 is indicated by a one-dot chain line arrow, and the direction of arc blowing is indicated by a two-dot chain line arrow.

In the case of fig. 2, since the arc generated in the first switch 100 is blown off toward the root of the first movable spring 123, the arc cannot be further extended at the root of the first movable spring 123, and there is a possibility that the arc cannot be sufficiently extinguished. On the other hand, as shown in fig. 6, by blowing the arc away, the arc generated between the contacts can be sufficiently extended, and the arc can be more effectively extinguished.

The switch in this embodiment may be used as a separate component of the switch, or may be used as a connector with a switch in which the switch is incorporated.

[ 2 nd embodiment ]

Next, embodiment 2 will be explained. In the switch of the present embodiment, current flows from the movable contact to the fixed contact in both the first switch 100 and the second switch 200. The switch in the present embodiment will be described with reference to fig. 7 to 10. Fig. 7 is a circuit diagram showing a connection state of the switch in the present embodiment, fig. 8 is a plan view of a main part of the switch in the present embodiment, fig. 9 is a sectional view of the first switch 100, and fig. 10 is a sectional view of the second switch 200.

As shown in fig. 7, the switch in the present embodiment is connected to the dc power supply 10 and the electronic device 20. The positive electrode of the dc power supply 10 is connected to the first movable contact 121, and the first fixed contact 111 is connected to the positive electrode terminal of the electronic device 20. The negative electrode of dc power supply 10 is connected to second fixed contact 211, and second movable contact 221 is connected to the negative electrode terminal of electronic device 20.

By connecting the switch in the present embodiment to the dc power supply 10 and the electronic device 20 as shown in fig. 7, when the switch is closed, a current flows in the direction of the broken line arrow in fig. 8, 9, and 10. Specifically, a current flows from first movable contact 121 to first fixed contact 111 in first switch 100, and also flows from second movable contact 221 to second fixed contact 211 in second switch 200. As shown in fig. 8, when the permanent magnet 320 is provided so that the first switch 100 side is an S pole and the second switch 200 side is an N pole, a magnetic field generated by the permanent magnet 320 is generated in a direction indicated by an arrow of a one-dot chain line in fig. 8.

Accordingly, the arc generated between the contacts of the first switch 100 can be blown off in the direction indicated by the arrow of the two-dot chain line, that is, in the direction opposite to the direction in which the first movable spring 123 and the first fixed spring 112 are provided when viewed from the contacts. Further, the second switch 200 can blow the arc in the direction opposite to the direction in which the second movable spring 223 and the second fixed spring 212 are provided when viewed from the contact. In other words, the first switch 100 can blow the arc in a direction away from the first fixed part 110 and the first movable part 120, and the second switch 200 can blow the arc in a direction away from the second fixed part 210 and the second movable part 220.

In the above description, the case where the current flows from first movable contact 121 to first fixed contact 111 in first switch 100 and also flows from second movable contact 221 to second fixed contact 211 in second switch 200 has been described. However, the switches may be connected to the power supply and the load so that the current flows from the fixed contact to the movable contact in both the first switch 100 and the second switch 200, and the permanent magnet 320 may be reversed, that is, the first switch 100 side may be the N-pole and the second switch 200 side may be the S-pole.

The configuration other than the above is the same as that of the first embodiment.

[ embodiment 3 ]

Next, embodiment 3 will be described with reference to fig. 11 and 12. The switch of the present embodiment has a structure in which a yoke 330 is provided, and the yoke 330 concentrates a magnetic field in a region between the fixed contact and the movable contact. That is, yoke 330 is provided to concentrate the magnetic field generated by permanent magnet 320 in the region between the contacts between first fixed contact 111 and first movable contact 121 and in the region between the contacts between second fixed contact 211 and second movable contact 221.

The yoke 330 is formed in a U-shape. The permanent magnet 320 is disposed near the center of the inside of the yoke 330. The first fixed contact 111 and the first movable contact 121, and the second fixed contact 211 and the second movable contact 221 are disposed inside the U-shaped portion of the yoke 330. Thus, the first fixed contact 111 and the first movable contact 121 are sandwiched between the one end 331 of the yoke 330 and the permanent magnet 320, and the second fixed contact 211 and the second movable contact 221 are sandwiched between the other end 332 of the yoke 330 and the permanent magnet 320.

The yoke 330 is formed of a material containing a magnetic material such as iron, cobalt, or nickel. The permanent magnet 320 is close to the yoke 330 to reduce leakage of magnetic flux, and the magnetic flux generated in the permanent magnet 320 passes through the yoke 330. That is, as shown by the dashed dotted line in fig. 11, the magnetic flux from the permanent magnet 320 passes through the yoke 330, and passes between the first fixed contact 111 and the first movable contact 121, and between the second fixed contact 211 and the second movable contact 221.

In the present embodiment, the magnetic field generated by the permanent magnet 320 can be concentrated in the region between the contacts of the first switch 100 and the region between the contacts of the second switch 200 sandwiched between the one end 331 of the yoke 330 and the permanent magnet 320. This can increase the magnetic field in the region between the first fixed contact 111 and the first movable contact 121 and in the region between the second fixed contact 211 and the second movable contact 221, and can effectively extinguish an arc in a short time even when an arc is generated between the contacts.

The contents other than the above are the same as those of the first embodiment.

The embodiments of the present invention have been described above, but the content of the present invention is not limited to the above.

This international application takes Japanese patent application No. 2015-022620 applied on 6/2/2015 as the basis for priority claims, and this international application cites the entire contents of Japanese patent application No. 2015-022620.

Description of the symbols

10 power supply

20 electronic device

100 first switch

110 first fixed part

111 first fixed contact

112 first fixing spring

113 first fixed part external terminal

120 first movable part

121 first movable contact

122 first movable plate

123 first movable spring

124 first movable part external terminal

200 second switch

210 second fixed part

211 second fixed contact

212 second fixing spring

213 second fixed part external terminal

220 second movable part

221 second movable contact

222 second movable plate

223 second movable spring

224 second movable part external terminal

310 card

320 permanent magnet

330 yoke

331 an end portion

332 at the other end