JP2005019161A - Relay device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay device convenient to handle having a simple structure capable of accomplishing the miniaturization and reduction of weight, and cutting off a D.C. high voltage in a short time. <P>SOLUTION: A plurality of fixed contacts 2 and a plurality of moving contacts 3 are disposed oppositely to each other in a case 1; the moving contacts 3 are supported by a contact displacement mechanism 4; and it is displaced by a solenoid 6 to open and close the respective fixed contacts 2 and the respective moving contacts 3. A series circuit is formed when the plurality of contacts 2 and 3 are electrically connected; and the generation of arcs between the respective contacts 2 and 3 is restrained by voltage dividing. This very compact relay device capable of extinguishing the arc without the need to form the periphery of each contact into an airtight structure and without securing a large extension amount of the arc, shaped into a single package and convenient to handle can be provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a DC current relay device, and more particularly, to a relay device capable of reliably interrupting a DC current with a simple structure.
[0002]
[Prior art]
In recent years, high voltage (about 400 volts) vehicles such as hybrid vehicles and fuel cell vehicles have been developed due to environmental problems. These automobiles are provided with a control circuit comprising a DC high voltage main battery and a high voltage circuit. In addition, since the main battery is a DC high voltage, it is necessary to disconnect the battery from the control circuit in the event of an accident. As a means for this purpose, a mechanical contact relay device is provided between the battery and the control circuit.
[0003]
In such a relay device, an arc generated when interrupting a DC high voltage becomes very large. However, when an arc occurs, a short circuit occurs and the interrupting speed becomes very slow, making it difficult to interrupt in a short time. . Further, the heat generated by the arc may impair the durability of the contact portion.
[0004]
Thus, conventionally, a technique has been disclosed in which hydrogen or a gas mainly composed of hydrogen having a high electron adhesion coefficient is enclosed in an arc generating portion and the arc is quickly dissipated with this hydrogen (see, for example, Patent Document 1). According to this, by rapidly extinguishing the arc, it is possible to cut off in a short time and to suppress the heat generation at the contact portion or the like to reduce the deterioration of durability.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-320437
[0006]
[Problems to be solved by the invention]
However, in patent document 1, in order to suppress generation | occurrence | production of an arc with gas, such as hydrogen, it is necessary to airtightly seal this gas in a case. However, since it is necessary to realize a contact structure that can be opened and closed in the case and to electrically take out these contacts to the outside of the case, in order to make the case completely airtight The manufacturing process becomes complicated and requires a great deal of cost. Moreover, it is very difficult to maintain airtightness without performing maintenance on scrap cars.
[0007]
Further, this case needs to have long-term resistance against an inert gas such as hydrogen in addition to heat resistance enough to withstand the heat generated by the arc. Materials must be used. For this reason, there was a problem that the material cost of the case was high.
[0008]
Moreover, in order to ensure both airtightness and heat resistance, it is necessary to increase the thickness of the case, which not only increases the cost of the case, but also increases the shape of the case, and the limited space of an automobile It has been very difficult to achieve downsizing and weight reduction without reducing the performance of the equipment mounted on the PC.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a convenient relay device that has a simple structure, reduces the deterioration of durability caused by an arc, achieves miniaturization and weight reduction, and can cut off DC high voltage in a short time. It is to provide.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a case, a plurality of first contacts installed in the case, and the first contacts in the case so as to be connectable to each other. The plurality of second contacts that are movably installed, and the plurality of second contacts in the case are supported, and the second contacts can be displaced so as to contact and separate from the first contacts. Contact displacement means; and drive means installed in the case for driving the contact displacement means to displace in a direction in which the first contacts and the second contacts are separated from each other; The first contact includes an input contact, an output contact, and at least one intermediate contact having two contact portions disposed between the two contacts, and the second contact is configured to input the input when in conduction. A plurality of contacts, the intermediate contacts, and the output contacts sequentially connected in series It is intended to include connection contacts.
[0011]
Invention of Claim 2 is the relay apparatus of Claim 1, Comprising: The said drive means has a drive shaft by which one end is fixed to the said contact displacement means, each said 1st contact, and each said each A shaft actuating part for moving the drive shaft forward and backward in a direction in which the two contacts are separated from each other, and a support plate for supporting the shaft actuating part, and engaging an end of the support plate with the inner surface of the case An engagement groove for positioning the driving means is formed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a longitudinal sectional view showing a relay device according to one embodiment of the present invention.
[0013]
As shown in FIG. 1, this relay device includes a plurality of fixed contacts (first contacts) 2 and a plurality of movable contacts (second contacts) 3 that can be connected to the fixed contacts 2 in a case 1. A contact displacement mechanism (contact displacement means) 4 that is displaceable so that the movable contact 3 is brought into and out of contact with the fixed contact 2 and a solenoid (drive means) 6 that drives the contact displacement mechanism 4 to be displaced are accommodated. Being done.
[0014]
The case 1 is made of a general industrial plastic such as polycarbonate or methacryl which is insulative and inexpensive, and as shown in FIG. 2, an upper surface for housing the fixed contact 2, the movable contact 3, the contact displacement mechanism 4 and the solenoid 6. An open box 12 and a lid 13 that closes the upper surface of the box 12 are provided.
[0015]
As shown in FIG. 2, the box 12 has an outer shape formed in a substantially rectangular parallelepiped shape. An open top displacement mechanism housing chamber 122 and a top open solenoid housing chamber 123 in which the solenoid 6 is housed are sequentially communicated.
[0016]
As shown in FIG. 2, the contact accommodating chamber 121 is disposed near the bottom wall 124 at one end of the case 1, and the fixed contact 2 and the movable contact 3 (FIG. 1) are disposed so as to face each other. The bottom wall 124 located at one end of the contact accommodating chamber 121 is provided with a pair of connection holes 124a for projecting and fixing the terminal connection portions 21b and 22b of the fixed contact 2 to the outside. The fixed contact 2 is housed and fixed in the contact housing chamber 121 by penetrating and fixing the terminal connection portions 21b and 22b.
[0017]
Further, in the central portion of the contact accommodating chamber 121, a pair of contact portions 23a of the intermediate contact 23 described later of the fixed contacts 2 and a pair of contact portions 31a closer to the center of the movable contact 3 described later are provided. A central wall 126 is formed to partition each other.
[0018]
The central wall 126 and the side walls 125 on both sides of the contact housing chamber 121 are respectively formed with rectangular magnet housing holes 121 a and 121 b for housing the plate-like permanent magnet 5. The permanent magnet 5 will be described later.
[0019]
As shown in FIG. 2, the displacement mechanism accommodating chamber 122 is formed at the center of the case 1 and is slightly larger than the support member 41 so that the support member 41 shown in FIG. 1 can move in the contact opening / closing direction P. Is formed.
[0020]
A spring receiving body 122a having a U-shaped cross section (FIG. 1) is formed at the center of the position where the displacement mechanism housing chamber 122 communicates with the contact housing chamber 121. ing. The spring receiver 122 a is integrally extended from the central wall 126 in the contact accommodating chamber 121.
[0021]
The solenoid accommodation chamber 123 is formed on the other end side of the case 1 with respect to the displacement mechanism accommodation chamber 122 and accommodates the solenoid 6.
[0022]
As shown in FIG. 2, the lid 13 is a plate formed in an area covering the open upper surface of the box 12, and screws formed on the upper surfaces of the bottom wall 124 and the side wall 125 of the box 12. A screw hole 131 is formed at a position corresponding to the hole 128, and a screw (not shown) is screwed into the screw holes 128, 131, so that the cover 13 is closed and closed on the upper surface of the box 12. The
[0023]
As shown in FIG. 1, the fixed contact 2 includes an input contact 21 to which an external terminal is connected, an output contact 22, and one intermediate contact 23 disposed between these contacts 21 and 22. .
[0024]
The input contact 21 and the output contact 22 are provided with one contact portion 21a, 22a to be brought into contact with the movable contact 3, and a terminal connection portion 21b, 22b. The terminal connection portions 21b and 22b are in a state of protruding out of the case 1. For example, a silver alloy is used for the contact portions 21a and 22a.
[0025]
The intermediate contact 23 has a U-shaped or substantially U-shaped cross section, and contact portions 23a that are brought into contact with the movable contact 3 are formed on both ends of the U-shaped or U-shaped. Although not shown, the input contact 21, the output contact 22, and the intermediate contact 23 are fixed in the case 1 with screws or the like.
[0026]
The movable contact 3 includes one connection contact 31 that contacts the contact portion 21a of the input contact 21 and one contact portion 23a of the intermediate contact 23 in the fixed contact 2, and the contact portion 22a of the output contact 22 in the fixed contact 2. The other contact part 31 which contacts the other contact part 23a of the contact 23 is provided.
[0027]
Each connection contact 31 includes a support portion 31b having a flat portion and two contact portions 31a.
[0028]
The contact part 31a is made of, for example, a silver alloy and is fixed to the flat part of the support part 31b. The contact part 21a of the input contact 21, the contact part 22a of the output contact 22, or the contact part of the intermediate contact 23 23a is contacted.
[0029]
Further, the input contact 21, the intermediate contact 23, the output contact 22, and the connection contact 31 are arranged in the case 1 so that their contact positions are positioned on the same straight line perpendicular to the contact opening / closing direction. Specifically, in a state where the fixed contact 2 and the movable contact 3 are overlapped, the respective contacts are arranged on the same straight line when viewed from the non-contact surface side of one contact.
[0030]
As shown in FIG. 3, by arranging the respective contacts in this way, the contact portions of the respective contacts are brought into contact with each other from the input contact 21, one connection contact 31, the intermediate contact 23, and the other connection. The contact 31 and the output contact 22 are connected in series. Although FIG. 3 shows an example in which the input contact 21, the output contact 22, the intermediate contact 23, and the connection contact 31 are each formed in a columnar shape, it may be a prismatic shape. Further, the shapes of the contact portions 21a, 22a, 23a, 31a are also shown in a substantially disc shape in FIG. 3 corresponding to the shapes of the input contact 21, the output contact 22, the intermediate contact 23, and the connection contact 31, respectively. However, it is not necessary to correspond to the shapes of the input contact 21, the output contact 22, the intermediate contact 23, and the connection contact 31, and for example, a plate body having a quadrangular plate surface may be used. Further, in FIG. 3, for convenience, the connection contact 31 that relay-connects the input contact 21 and the intermediate contact 23 and the connection contact 31 that relay-connects the intermediate contact 23 and the output contact 22 are shown as a single member. Actually, as shown in FIG. 1, the contact portion 31a of the connecting contact 31 has a one-to-one correspondence so as to be individually connected to the contact portions 21a, 22a, and 23a of the input contact 21, the output contact 22, and the intermediate contact 23. It is formed with.
[0031]
The connection contact 31 is reciprocated in the contact opening / closing direction P by the contact displacement mechanism 4. By reciprocating the connecting contact 31 by the contact displacement mechanism 4, the contacts are opened and closed, and the connecting contact 31 is switched between a contact state and a non-contact state with respect to the input contact 21, the output contact 22 and the intermediate contact 23.
[0032]
The contact displacement mechanism 4 includes a support member 41, two first springs 42, and one second spring 43.
[0033]
The support member 41 is inserted into a support shaft 31c whose one end is fixed to the support portion 31b of the connection contact 31, and is supported so as to be slidable in the axial direction of the support shaft 31c. A nut 31d serving as a flange portion is screwed to the other end side of the support shaft 31c.
[0034]
The first spring 42 is a winding spring, and is disposed between the support portion 31b of the movable contact 3 and the support member 41, and the support shaft 31c is inserted therethrough. As a result, the first spring 42 biases the support portion 31b in a direction away from the support member 41 (that is, a direction toward the fixed contact 2). Thereby, when the contact part 31a of the movable contact 3 comes into contact with the contact parts 21a and 22a of the fixed contact 2, the contact pressure between the contact parts 31a, 21a and 22a is increased and the shock at the time of contact is buffered. And the function which prevents damage to both contact part 31a, 21a, 22a is fulfilled.
[0035]
The second spring 43 is a spiral spring, and is sandwiched between the center portion of the surface of the support member 41 facing the contact accommodating chamber 121 and the spring receiver 122 a of the case 1, and the support member 41 is attached to the case 1. Energize in the contact opening direction.
[0036]
The solenoid 6 advances and retracts the support member 41 in the contact opening / closing direction P, a drive shaft 44a whose one end is fixed to the support member 41, a shaft operating unit 44b that advances and retracts the drive shaft 44a in the contact opening / closing direction P, And a support plate 44c that supports the shaft operating portion 44b.
[0037]
One end of the drive shaft 44a is fixed at an intermediate position of the support member 41, and the other end is inserted into an insertion hole (not shown) provided in the shaft operating portion 44b.
[0038]
The shaft actuating portion 44b uses a general electromagnetic coil, and moves the drive shaft 44a in a direction protruding from the insertion hole (contact closing direction) when an electric current flows and is turned on. That is, when the shaft actuating portion 44b is in the ON state, the drive shaft 44a is moved toward the fixed contact 2 against the spring force of the second spring 43 (contact closing direction), and the movable contact 3 is moved to the fixed contact 2. Make contact. When the shaft actuating portion 44b is in the off state, the drive shaft 44a is moved in the direction away from the fixed contact 2 (contact opening direction) by the spring force of the second spring 43, as shown in FIG.
[0039]
The support plate 44c is a rectangular plate that positions and supports the shaft operating portion 44b with respect to the case 1. A drive shaft 44a extending from the shaft operating portion 44b toward the support member 41 is passed through the central portion of the support plate 44c. The fixing of the support plate 44c to the case 1 will be described later.
[0040]
When the drive shaft 44a of the solenoid 6 operates, the support member 41 moves forward and backward in the case 1 toward the bottom wall 124 (FIG. 2). When the support member 41 moves in the contact closing direction, the support portion 31b of the connection contact 31 is pushed to the fixed contact 2 side by the support member 41 via the first spring 42 and the contact portions of the two connection contacts 31 are contacted. 31a contacts the contact portions 21a, 22a, and 23a of the fixed contact 2 at the same time.
[0041]
When the support member 41 moves in the contact opening direction, the support member 31 pulls back the support portion 31b of the connection contact 31 via the nut 31d of the support shaft 31c. Then, the contact portions 31a of the two connection contacts 31 are simultaneously separated from the contact portions 21a, 22a, and 23a of the fixed contact 2. Thus, the movable contact 3 is opened and closed with respect to the fixed contact 2 by the contact displacement mechanism 4.
[0042]
Then, a DC power source is connected to the terminal connection portion 21b of the input contact 21 via a terminal (not shown), and energization / interruption is performed by contact / separation of each contact.
[0043]
In addition, the plate-like permanent magnets 5 are accommodated in the above-described magnet accommodation holes 121 a and 121 b formed in the center portion and both side walls 125 of the contact accommodation chamber 121 of the case 1. Thereby, each permanent magnet 5 is arranged at two places on the non-intermediate contact side of the input contact 21 and the output contact 22 and at one place between the two contact portions 23 a of the intermediate contact 23 and between the connecting contacts 31. Is done.
[0044]
Further, as shown in FIG. 4, the permanent magnet 5 is arranged on the same straight line so that one pole (for example, N pole) is located on the same side. These permanent magnets 5 apply a magnetic field between the fixed contact 2 and the movable contact 3. Due to the magnetic field of the permanent magnet 5, when the contacts are interrupted, the arc 100 generated between the contacts is stretched and distorted by the Lorentz force. 4 shows an example in which the input contact 21, the output contact 22, the intermediate contact 23, and the connection contact 31 are each formed in a columnar shape as in FIG. 3, but may be a prismatic shape. Absent. Also, the shapes of the contact portions 21a, 22a, 23a, 31a are substantially discs corresponding to the shapes of the input contact 21, the output contact 22, the intermediate contact 23, and the connection contact 31, respectively, in FIG. However, it is not necessary to correspond to the shapes of the input contact 21, the output contact 22, the intermediate contact 23, and the connection contact 31. For example, the plate surface may be a rectangular plate. Further, in FIG. 4, as in FIG. 3, for convenience, the connecting contact 31 that relay-connects the input contact 21 and the intermediate contact 23 and the connecting contact 31 that relay-connects the intermediate contact 23 and the output contact 22 are each formed as a single member. Although actually shown, as shown in FIG. 1, the contact portion 31 a of the connection contact 31 is separately connected to each of the contact portions 21 a, 22 a, and 23 a of the input contact 21, the output contact 22, and the intermediate contact 23. Thus, it is formed in a one-to-one correspondence.
[0045]
In the contact accommodating chamber 121 of the case 1, an arc at the time of opening / closing the contact between the contacts by blocking between the input contact 21 and the intermediate contact 23 of the fixed contact 2 and between the output contact 22 and the intermediate contact 23. An insulating blocking wall 11 for preventing a short circuit due to 100 protrudes inward from the inner surface of the bottom wall 124 (FIG. 2) and is integrally formed. When the contact is closed, the contact portion 31a of the connection contact 31 is displaced to a position where it contacts the fixed contact 2, so that the contact portions 31a adjacent to each other of the connection contact 31 are also separated by the blocking wall 11 as shown in FIG. Insulation is cut off. Thereby, while the contact part 21a, 22a, 23a, 31a adjacent at the time of a contact closing can be maintained the state which prevented reliably, the adjacent contact part 21a, 22a, 23a at the time of arc generation | occurrence | production at the time of a contact cutting | disconnection etc. , 31a are prevented from being short-circuited.
[0046]
Further, when the magnet 5 is installed as shown in FIG. 4, the arcs 100 generated at the adjacent contacts are opposite to each other according to Fleming's left-hand rule. The arcs 100 that are dissipated in the opposite direction collide with each other, and there is a possibility that the dissipation may be hindered. However, in this embodiment, since the contacts between the arcs 100 are shielded by the blocking wall 11, It is possible to prevent the arcs 100 that are adjacent and dissipated in the opposite directions from colliding with each other. Therefore, it is possible to prevent the emission from being hindered.
[0047]
Here, on the inner surfaces of the side walls 125 on both sides of the case 1, the solenoid 6 is engaged with the end of the support plate 44 c of the solenoid 6 at a position that forms a boundary between the solenoid accommodation chamber 123 and the displacement mechanism accommodation chamber 122. An engagement groove 123a for positioning and fixing at a fixed position of the solenoid housing chamber 123 is formed. As described above, the shaft operating portion 44b can be easily positioned in the contact opening / closing direction P with respect to the case 1 simply by engaging both end portions of the support plate 44c of the solenoid 6 with the engaging groove 123a of the case 1.
[0048]
In addition, the side wall 125 at the communication position between the displacement mechanism accommodation chamber 122 and the contact accommodation chamber 121 of the case 1 is in contact with the back surface of the outer end of the connection contact 31 of the movable contact 3 in the contact open state. A stopper 127a for restricting the open position of 31 is formed so as to project inward.
[0049]
Further, the back surface portion 127b of the spring receiver 122a formed at the center of the communication position between the displacement mechanism housing chamber 122 and the contact housing chamber 121 of the case 1 is located inside the connection contact 31 of the movable contact 3 in the contact open state. It functions as a stopper that abuts against the back surface of the end portion and regulates the open position of the connecting contact 31.
[0050]
And the back surface position of the back surface part 127b of the spring receptacle 122a is set so that it may become the same surface as the contact surface contact | abutted to the connection contact 31 of the stopper 127a formed in the side wall 125 of the contact accommodating chamber 121. FIG. Thus, when the contact is in the open state, the back surface portion 127b of the spring support 122a and the stopper 127a both come into contact with the back surface of the connection contact 31 of the movable contact 3, and the fixed contact 2 of the contact portion 31a of the movable contact 3 at this time. The contact distances of the contact portions 21a and 22a are equal to each other, so that the amount of arc generated can be distributed almost evenly at each contact position.
[0051]
Next, energization / interruption of the contacts will be described.
[0052]
When energizing with the contacts closed, the movable contact 3 is closed to bring the movable contact 3 and the fixed contact 2 into contact with each other (state shown in FIG. 3). When the contact is energized, a current flows from the input contact 21, and a current flows in series to the one connection contact 31, the intermediate contact 23, the other connection contact 31, and the output contact 22. And in the state shown in FIG. 4, the permanent magnet 5 is arrange | positioned so that a magnetic force line may go from left to right. Therefore, according to Fleming's left-hand rule, the Lorentz force is generated alternately in the forward direction and in the backward direction in FIG. 4, and the arc 100 generated when the contact is interrupted is alternately distorted back and forth.
[0053]
Further, when the two contacts are opened and blocked, the movable contact 3 and the fixed contact 2 are separated from each other by the opening operation of the movable contact 3 (the state of FIG. 4).
[0054]
At the time of this interruption, an arc 100 is generated between the fixed contact 2 and the movable contact 3, but this arc 100 is distorted in the above-described direction by the magnetic field of the permanent magnet 5.
[0055]
In this embodiment, since a large number of contacts are connected in series, the cut-off voltage is divided, the arc can be extinguished, and the voltage can be cut off in a short time.
[0056]
As a result, the arc 100 can be extinguished without the need for an airtight structure around the contact point and without increasing the amount of stretching of the arc 100, so that a very compact relay device can be realized. Further, since the contact points are arranged in series to divide the cut-off voltage, the durability of the contact points can be improved.
[0057]
Moreover, since heat generation can be suppressed by rapid extinction of the arc 100 and it is not necessary to use an inert gas such as hydrogen, it is not necessary to use a material such as ceramic. Therefore, the case 1 can be manufactured using a lightweight and inexpensive industrial plastic, and the material cost of the case 1 can be suppressed. Furthermore, since the fixed contact 2, the movable contact 3, the contact displacement mechanism 4 and the solenoid 6 are housed in the same case 1 and made into one package, a small, lightweight and convenient handling relay device can be provided. .
[0058]
In particular, when the relay device according to this embodiment is used as a relay for turning on / off a high voltage circuit in a high voltage (about 400 V) vehicle such as a hybrid vehicle or a fuel cell vehicle, the relay device is compact. Therefore, it is possible to effectively use a limited space and provide a relay device that is preferable from the viewpoint of energy saving because of its light weight.
[0059]
In addition, since the extending direction of the arc 100 is alternately different along the contact arrangement direction, even if a reverse current such as regenerative energy occurs, the arcs are not connected to each other, and the reverse current can be sufficiently handled. it can.
[0060]
Then, on the inner surfaces of the side walls 125 on both sides of the case 1, the end of the support plate 44 c of the solenoid 6 is engaged with the solenoid 6 at a position that forms a boundary between the solenoid accommodation chamber 123 and the displacement mechanism accommodation chamber 122. Since the engagement groove 123a for positioning and fixing at a fixed position of the chamber 123 is formed, the shaft operation is performed only by engaging both end portions of the support plate 44c of the solenoid 6 with the engagement groove 123a of the case 1. The part 44b can be easily positioned with respect to the case 1 in the contact opening / closing direction P. Accordingly, when the drive shaft 44a of the solenoid 6 is operated, the support member 41 appropriately moves back and forth toward the bottom wall 124 of the case 1, so that the contact portion 31a of the movable contact 3 and the contact portion 21a of the fixed contact 2 are Variations in contact pressure, separation speed, separation distance, and the like due to dimensional errors can be suppressed as much as possible during opening / closing operations with 22a and 23a.
[0061]
In the above embodiment, the four contact portions 21a, 22a, 23a on the fixed contact 2 side and the four contact portions 31a on the movable contact 3 side are opened and closed with each other. There is no problem even if it is a structure that opens and closes the contact parts.
[0062]
In the above embodiment, the first contact is the fixed contact 2 and the second contact is the movable contact 3. However, both the first contact and the second contact may be movable contacts.
[0063]
【The invention's effect】
According to the first aspect of the present invention, the case, the plurality of first contacts installed in the case, and the plurality of movable installations facing each other so as to be connectable to each first contact in the case. A second contact, a contact displacing means that supports a plurality of second contacts in the case and is displaceable so as to move the second contact to and away from the first contact; Driving means for displacing the contact displacement means in a direction in which each first contact and each second contact are separated from each other, the first contact being an input contact, an output contact, and both contacts And at least one intermediate contact having two contact portions disposed therebetween, and the second contact includes a plurality of connecting contacts that sequentially connect the input contact, the intermediate contact, and the output contact in series when conducting. So create multiple contacts connected in series with each contact closed, voltage By dividing by suppressing arcing, it is possible to realize a cut-off in a short time.
[0064]
Therefore, unlike the prior art, the arc can be extinguished without having to have an airtight structure around the contact point and without taking up a large amount of the arc, so that a very compact relay device can be realized. Further, since the contact points are arranged in series to divide the cut-off voltage, the durability of the contact points can be improved.
[0065]
Moreover, since heat generation can be suppressed by rapid extinction of the arc and it is not necessary to use an inert gas such as hydrogen, it is not necessary to use a material such as ceramic as in the prior art. Accordingly, the case can be manufactured using a light and inexpensive industrial plastic, and the material cost of the case can be suppressed.
[0066]
Furthermore, since the first and second contacts, the contact displacement means, and the drive means are housed in the same case and formed into a single package, a small, lightweight, and convenient relay device can be provided.
[0067]
In particular, when this relay device is used as a relay for turning on / off a high voltage circuit in a high voltage vehicle such as a hybrid vehicle or a fuel cell vehicle, the relay device is compact, so that it has a limited space. A relay device that can be effectively used and is light in weight, and is also preferable from the viewpoint of energy saving.
[0068]
According to the second aspect of the present invention, the drive means can be easily positioned in the case simply by engaging the end of the support plate of the drive means with the engagement groove formed on the inner surface of the case. Therefore, when the driving means is driven to displace the contact displacing means, the contact displacing means appropriately displaces based on the position of the appropriately positioned driving means, so that the second contact and the first contact Variations in contact pressure, separation speed, separation distance, and the like due to dimensional errors can be suppressed as much as possible during opening and closing operations with the contacts.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a relay device according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing a case of the relay device according to one embodiment of the present invention.
FIG. 3 is a principle schematic diagram showing a state in energization where contacts are in contact in the relay device according to one embodiment of the present invention.
FIG. 4 is a principle schematic diagram showing a state when the contact is non-contacting in the relay device according to one embodiment of the present invention.
5 is a cross-sectional view taken along line XX of FIG.
[Explanation of symbols]
1 case
2 Fixed contacts
3 movable contacts
4 Contact displacement mechanism
5 Permanent magnet
6 Solenoid
11 barrier
12 box
121 Contact chamber
121a, 121b Magnet housing hole
122 Displacement mechanism accommodation chamber
122a Spring receiver
123 Solenoid chamber
123a Engaging groove
124 Bottom wall
124a connection hole
125 sidewall
126 Central wall
127a Stopper
127b Rear side
13 Lid
21 Input contact
21a, 22a, 23a Contact part
21b, 22b Terminal connection
22 Output contact
23 Intermediate contact
31 Connecting contacts
31a Contact part
31b Support part
31c Support shaft
31d nut
41 Support member
44a Drive shaft
44b Shaft actuator
44c Support plate

Claims (2)

Case and
A plurality of first contacts installed in the case;
A plurality of second contacts that are movably installed facing each other so as to be connectable to the first contacts in the case;
Contact displacing means that supports a plurality of the second contacts in the case and is displaceable so as to move the second contacts to and away from the first contacts;
Drive means installed in the case and driving to displace the contact displacement means in a direction in which the first contacts and the second contacts are separated from each other;
The first contact includes an input contact, an output contact, and at least one intermediate contact having two contact portions disposed between the two contacts.
The second contact is a relay device including a plurality of connection contacts that sequentially connect the input contact, the intermediate contact, and the output contact in series when conducting. The relay device according to claim 1,
The drive means
A drive shaft having one end fixed to the contact displacement means;
A shaft actuating part that advances and retracts the drive shaft in a direction in which each of the first contacts and each of the second contacts are separated from each other;
A support plate for supporting the shaft operating part,
The relay device, wherein an engagement groove for engaging the end portion of the support plate to position the drive means is formed on the inner surface of the case.

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