JP2016157603A - Dc connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe DC connector which prevents shock hazard.SOLUTION: A DC connector 10 includes a first housing 12, a second housing 14, a first contactor 16 in the first housing 12, a second contactor in the second housing 14, a magnet and an arc-extinguishing part. The arc-extinguishing part is constituted of a plurality of plate bodies. An arc propagates on the surface of the plate bodies, and is prolonged and cut. The arc is cooled and the arc resistance increases, and since the arc cannot be maintained, the arc is extinguished.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a DC connector used in a system for passing a DC current.

  In recent years, systems that allow a large current to flow in a direct current are increasing due to the use of solar power generation and electric vehicles. A DC connector is used to connect the photovoltaic power generation device to the storage battery or to connect the electric vehicle to the power supply device. Connect devices with a DC connector when supplying power. When the power supply is finished, remove the DC connector.

  If the DC connector is removed while a large current is flowing, an arc is generated. It is necessary to provide a means for preventing an electric shock accident due to an arc. In particular, an increase in the number of systems through which a large direct current flows increases the opportunities for amateurs to handle, so the importance of means for preventing electric shock accidents is high.

  Therefore, it is conceivable to construct a circuit or the like so that no current flows when the DC connector is removed. No arcing and no electric shock. However, when a circuit or the like breaks down, a current flows when the DC connector is removed, and an arc may occur.

  Patent Document 1 discloses an arc extinguishing method using Lorentz force. The arc is bent by the Lorentz force to prevent a short circuit between the terminals. However, if the arc becomes long, the probability of touching the arc when the DC connector is removed increases, and there is a risk of electric shock.

JP2014-154372A

  An object of the present invention is to provide a safe DC connector that prevents an electric shock accident.

  A DC connector according to the present invention includes a first housing, a first contact disposed in the first housing, a second housing fitted to the first housing, a second housing disposed in the second housing, When the first housing and the second housing are fitted together, a second contact connected to the first contact, and a magnet that generates a magnetic field across an arc generated between the first contact and the second contact And a plurality of plates attached to the inner wall of the first or second housing in which the magnet is disposed, and for extinguishing an arc generated between the first contact and the second contact, An arc extinguishing portion having a length in the connecting direction of the contact and the second contact that is longer than that of the arc, and an external conductive member connected to the first contact and the second contact, respectively.

  When the first housing and the second housing are fitted together, the contacts are connected to each other and current can flow. If the contacts are removed while current is flowing, an arc is generated between the contacts. Since the arc crosses the magnetic field generated by the magnet, the Lorentz force acts and the arc follows the surface of the arc extinguishing part. The arc is stretched or extinguished.

  A plurality of plates are provided in a direction in which the arc is bent by the Lorentz force generated by the magnetic field of the magnet. The length of the surface of the arc extinguishing part is increased by the plate.

  There are a plurality of the first contacts and the second contacts. When the first contact and the second contact are connected, a magnet is disposed between the first contacts or between the second contacts.

  According to the present invention, the arc is extinguished in the direction in which the arc is bent by the magnetic field of the magnet, and the length of the arc extinguishing part is longer than the arc, so that the arc can be extinguished by the arc extinguishing part. Can prevent an electric shock accident. Since the contact is arranged so that the arc always follows the arc extinguishing part, it is easy to extinguish the arc. By configuring the arc extinguishing part with a plurality of plates, the arc extinguishing part is reduced in size.

It is a perspective view which shows the external appearance of the DC connector of this invention. It is sectional drawing which shows the upper surface of the DC connector of this invention. It is sectional drawing which shows the side surface of the direct-current connector of this invention. It is sectional drawing which shows the upper surface when a 1st contactor and a 2nd contactor are connected. It is sectional drawing which shows a side surface when a 1st contactor and a 2nd contactor are connected. (A) is a figure which shows magnetic flux, (b) is a figure which shows Lorentz force. (A) is the figure which has arrange | positioned the magnet outside the 2nd housing, (b) is a figure at the time of attaching two magnets. FIG. 7 is a diagram showing a 90 ° difference with respect to the magnetic poles of the magnet of FIG. It is a figure which shows the arc-extinguishing part provided with the plate body which goes around the inner wall of a housing. It is the figure which changed the length of the 2nd contact.

  The DC connector of the present invention will be described with reference to the drawings.

[Embodiment 1]
The DC connector 10 of the present invention shown in FIGS. 1, 2, and 3 includes a first housing 12, a second housing 14, a first contact 16 in the first housing 12, a second contact 18 in the second housing 14, The magnet 20 and the arc extinguishing part 22 disposed in the housing 14 on the same side as the magnet 20 are provided.

  The first housing 12 and the second housing 14 are formed by connecting two cylindrical bodies. Each housing 12, 14 may be configured by connecting a plurality of components so as to have a desired shape. Each housing 12 and 14 is comprised with insulators, such as resin.

  As shown in FIGS. 4 and 5, the first housing 12 and the second housing 14 are fitted together. It fits so that the outer surface of the 2nd housing 14 may contact | connect the inner surface of the 1st housing 12. FIG. As long as the first housing 12 and the second housing 14 are fitted together, the shape and the positional relationship on the inner surface side are arbitrary. It is also possible to fit the outer surface of the first housing 12 to the inner surface of the second housing 14.

  The first housing 12 may include a frame 26 into which the convex portion 24 and the convex portion 24 enter the second housing 14. When the housings 12 and 14 are fitted together, the convex portion 24 is pushed down. When the first housing 12 and the second housing 14 are fitted together, the convex portion 24 enters the frame 26, and the first housing 12 is fixed to the second housing 14. By fixing the housings 12 and 14, it is possible to prevent an unexpected dropout. When the housings 12 and 14 are separated from each other, the convex portions 24 are pushed and removed from the frame 26, and then the housings 12 and 14 are separated in a direction away from each other.

  In order to position the housings 12 and 14, the concave portion 28 may be provided on the inner surface of the first housing 12 and the convex portion 30 may be provided on the outer surface of the second housing 14. The convex part 30 passes through the concave part 28. The housings 12 and 14 are not fitted in the wrong direction, and connection errors between the contacts 16 and 18 can be prevented.

  The first contact 16 is disposed inside the first housing 12, and the second contact 18 is disposed inside the second housing 14. Each contact 16, 18 is fixed inside the housings 12, 14 with screws or the like.

  In the present embodiment, the first contact 16 is a male terminal, and the second contact 18 is a female terminal. The first contact 16 is a single metal plate. The second contactor 18 has two metal plates facing each other with a gap therebetween. A recess 36 is formed so as to approach each other near the tip, and the recesses 36 are in contact with each other. When the housings 12 and 14 are fitted together, the first contact 16 enters between the two metal plates of the second contact 18, and the first contact 16 and the recess 36 of the second contact 18 come into contact with each other. By providing the slit 38 at the tip of the second contactor 18 and dividing it into a plurality of pieces, the flexibility of the second contactor 18 is increased and the first contactor 16 can easily enter the second contactor 18.

  In addition, if the 1st contactor 16 and the 2nd contactor 18 are connected when the 1st housing 12 and the 2nd housing 14 are fitted together, the shape of each contactors 16 and 18 is arbitrary. It is also possible to apply a block connector or the like to the present application.

  Each contact 16, 18 is connected to an external conductive member such as a cable 32 in the housing 12, 14. By connecting the first contact 16 and the second contact 18, a current can flow between the first contact 16 and the second contact 18. The flowing current is a direct current. In FIG. 2 and the like, the screw 34 is shown as a connection means between each contact 16, 18 and the cable 32, but other connection means such as soldering may be used. The external conductive member includes not only the cable 32 but also any conductive member such as a printed wiring board or a metal plate, and the connection method may be any method including the screw 34.

  A step 44 is provided inside the first housing 12 and the second housing 14, and the contacts 16, 18 are bent twice by 90 ° so that the contacts 16, 18 follow the step 44. good. When the contacts 16 and 18 are removed, even if a force is applied to the openings 40 and 42 with respect to the contacts 16 and 18, the contacts 16 and 18 are caught on the step 44. The contacts 16 and 18 are not easily detached from the housings 12 and 14.

  An arc extinguishing portion 22 is attached to the inner surface of the second housing 14. The arc extinguishing part 22 is attached inward from the opening 40 of the second housing 14. When an arc is generated when the first contact 16 and the second contact 18 are removed, the arc extinguishing unit 22 is interposed therebetween. The arc extinguishing part 22 may be attached to either of the housings 12 and 14.

  The arc extinguishing portion 22 is made of a material having insulating properties and heat resistance. For example, a thermosetting resin, a heat-resistant thermoplastic resin, ceramic, or the like is used. Even if the arc extinguishing part 22 is heated by the arc, it is difficult to be damaged.

  The arc extinguishing part 22 has a structure in which a plurality of plate bodies 23 are arranged, and the arc travels on the surface of the plate body 23. The arc is extended by the plate body 23 of the arc extinguishing part 22. Further, the arc is cooled by the arc extinguishing unit 22, and the arc resistance is increased. The arc cannot be maintained and the arc is extinguished. The plate 23 is oriented perpendicular to the direction of the magnetic field applied to the arc. Further, the plate bodies 23 are arranged in the connecting direction of the first contact 16 and the second contact 18.

  In the connecting direction of the first contact 16 and the second contact 18, the length of the arc extinguishing part 22 is made longer than the length of the arc. The length of the arc extinguishing part 22 is the length of the surface of the arc extinguishing part 22. Since the arc extinguishing part 22 includes a plurality of plate bodies 23, the arc extinguishing portion 22 becomes longer by the length along the surface of the plate body 23. The length of the arc is determined by the current flowing through the first contact 16 and the second contact 18 when the arc extinguishing unit 22 is designed.

  Since the length of the arc extinguishing part 22 is longer than the length of the arc, the arc extinguishing can be completed when the second housing 14 is detached from the first housing 12. The arc extinguishing part 22 is reduced in size by the plurality of plates 23, and the DC connector 10 can be reduced in size.

  In addition, the tip of the first contact 16 is positioned inward of the opening 42 of the first housing 12. It becomes difficult for the first contact 16 to contact the human body or the like.

  In the present embodiment, when the first contact 16 and the second contact 18 are connected, the magnet 20 is located between the second contacts 18 and at the center. Further, depending on the shape of the contacts 16, 18, it may be disposed between the first contacts 16 and at the center. It is not limited to the center between any contacts.

  A magnetic field E is generated from the magnet 20 as shown in FIG. When an arc is generated between the contacts 16 and 18, the arc crosses the magnetic field E. The Lorentz force (Fleming's left-hand rule) is generated in a predetermined direction, as indicated by the arrow in FIG. The arc is bent by the Lorentz force. An arc extinguishing portion 22 is arranged in a direction perpendicular to the magnetic field E, and the arc is bent in the direction of the plate body 23. A magnet 20 that generates a magnetic field E for the arc to reach the arc extinguishing unit 22 is used.

  The direction of the magnetic field E is constant by the magnet 20, and the direction of the Lorentz force differs by 180 ° depending on the direction of the current flowing through each contact 16, 18. Therefore, the arc extinguishing part 22 is opposed 180 °. When the contacts 16 and 18 are connected and disconnected, the first contact 16 passes between the arc extinguishing portions 22.

  As described above, since the arc extinguishing section 22 having the plurality of plate bodies 23 is provided in the direction in which the arc is bent by the Lorentz force, the arc can be easily extinguished. Since the arc distance can be increased by the plurality of plates 23, the DC connector 10 can be made compact.

[Embodiment 2]
The position where the magnet 20 is disposed is not limited to the position described in the first embodiment. As shown in FIG. 7A, the magnet 20 may be disposed on the outer periphery of the housing 14. The shapes of the housings 12 and 14 are appropriately changed so that the magnet 20 can be fixed. Further, the number of magnets 20 is not limited to one, and can be two as shown in FIG. When a plurality of magnets 20 are used, the direction of the magnetic field between the magnets 20 is aligned.

[Embodiment 3]
If the arc extinguishing part 22 is arranged in the direction of the Lorentz force, the position of the magnetic pole of the magnet 20 and the position of the arc extinguishing part 22 are not limited. As in the case of the magnetic pole of the magnet 20 in FIG. 8, if the magnetic pole of the magnet 20 in FIG.

  As shown in FIG. 9, an arc extinguishing part 22 provided with a plate 23 so as to go around the inner wall of the housing 14 may be used. The arc may be bent in any direction.

[Embodiment 4]
In the first embodiment, there are two first contactors 16 and two second contactors 18, and the lengths of the first contactors 16 may be different. There is a time difference in the connection and disconnection timing between the contacts 16 and 18. Contact resistance at the time of connection and arc at the time of disconnection do not occur at the same time, the connection becomes easy, and induction of electromagnetic interference is reduced.

[Embodiment 5]
Each contact 16 and 18 is two, but the number is arbitrary. Accordingly, the shapes of the housings 12 and 14 are arbitrarily changed. If each contact terminal is plural, when the first contact 16 and the second contact 18 are connected, the magnet 20 is arranged between the first contacts 16 or between the second contacts 18. be able to. When an arc is generated when the contacts 16 and 18 are removed, the magnetic field E is caused to cross the arc.

  When there are a plurality of contacts 16 and 18, the lengths of the first contacts 16 can be made different. It is also possible to make the lengths of the second contactors 18 different. The lengths of both the first contacts 16 and the second contacts 18 may be different. The connection and disconnection timings of the contacts 16 and 18 are varied. In addition, the number of magnets 20 and arc extinguishing portions 22 is arbitrarily changed according to the number of contacts 16 and 18.

[Embodiment 6]
Like the second contactor 92 of the DC connector 90 of FIG. 10, the lengths of the portions 94 and 96 divided by the slit 38 can be made different. The first contact 16 easily enters the second contact 18. Further, the two second contactors 92 lengthen the portion 96 that is far from each other, and the occurrence of the arc becomes that portion. Even if an arc is generated in one second contact 92, it is generated in a location far from the other second contact 92, so that the influence of electromagnetic interference or the like can be reduced.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications, and changes are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

10, 90: DC connector 12: 1st housing 14: 2nd housing 16: 1st contactor 18, 92: 2nd contactor 20: Magnet 22: Arc extinguishing part 23: Plate body 24: Convex of 1st housing Portion 26: frame 28: concave portion 30 of the first housing; convex portion 32 of the second housing 32: screw 34: cable 36: concave portion 38 of the second electrode 38: slit 40, 42: opening 44: step 94, 96: second contact The divided part of the child

Claims (4)

A first housing;
A first contact disposed in the first housing;
A second housing fitted into the first housing;
A second contact disposed in the second housing and connected to the first contact when the first housing and the second housing are fitted together;
A magnet for generating a magnetic field across an arc generated between the first contact and the second contact;
A first contactor comprising a plurality of plates attached to the inner wall of the first or second housing where the magnet is disposed and for extinguishing an arc generated between the first contactor and the second contactor. And an arc extinguishing part whose length in the connecting direction of the second contactor is longer than the arc
DC connector with 2. The DC connector according to claim 1, wherein a plurality of plates are provided in a direction in which the arc is bent by the Lorentz force generated by the magnetic field of the magnet. 3. The DC connector according to claim 1, wherein the first contactor and the second contactor are plural. 4. The DC connector according to claim 3, wherein when the first contact and the second contact are connected, a magnet is disposed between the first contacts or between the second contacts.

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