JP2008004421A - Remote control relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote control relay capable of preventing breakage of a case even when a braided wire is gasified by a large current to generate a gas, and the internal pressure of the case is increased. <P>SOLUTION: This remote control relay 1 is provided with a polarized electromagnet device where a plunger is moved forward and backward in a case 2 by controlling a current carried to a coil, and is structured such that main contacts of a fixed contact and a moving contact are opened and closed in response to the forward/backward movement of the plunger; and the moving contact is connected to its connection terminal (main connection terminal) 9 through the braided wire. In the remote control relay, an opening 12 for discharging the gas generated by gasification of the braided wire is formed on sidewall parts 3c and 4c as outer walls of the case 2. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a remote control relay.

Conventionally, there has been known a remote control relay having a polarized electromagnet device in which a plunger is advanced and retracted by controlling energization of a coil in a case made of synthetic resin and the like, and opening and closing a main contact as the plunger moves forward and backward. (For example, Patent Document 1).
JP 2001-155614 A

  In this type of remote control relay, a braided wire made of a copper-based material may be provided as a lead wire in the case. In this case, if an excessive current exceeding 14000 [A] flows through the braided wire, In particular, the melting point of copper (1083 [° C.]) is exceeded, the braided wire is vaporized, the internal pressure of the case increases, and the case may break.

  Therefore, an object of the present invention is to provide a remote control relay that can suppress the cracking of the case even when the braided wire is vaporized by a large current and gas is generated to increase the internal pressure of the case.

  According to the first aspect of the present invention, there is provided a polarized electromagnet device in which a plunger moves forward and backward by controlling energization to the coil in the case, and opens and closes the main contact between the fixed contact and the movable contact as the plunger moves forward and backward. In the remote control relay in which the movable contact and the connection terminal thereof are connected by a braided wire, an opening is formed on the outer wall of the case to release the gas generated by vaporizing the braided wire. .

  In the invention of claim 2, the case includes, as the outer wall, a pair of bottom wall portions facing each other, and a side wall portion provided between the peripheral edges of the bottom wall portions, and the opening portion is provided. The side wall portion is provided at a position facing the external wiring connected to the connection terminal of the fixed contact or the movable contact.

  The invention according to claim 3 is characterized in that a lid member for closing the opening is attached to the outer wall.

  According to the first aspect of the invention, since the gas generated by the braided wire vaporizing from the opening can be released to the outside of the case, it is possible to suppress the case from cracking due to an increase in the internal pressure of the case.

  According to the second aspect of the present invention, an external wiring is interposed between the opening and an inner wall surface of a casing (such as a distribution board casing) in which the remote control case is accommodated. A space can be ensured between the inner wall surface and the inner wall surface, and the internal pressure in the vicinity of the opening in the housing can be prevented from being locally increased by the gas discharged from the opening.

  According to the third aspect of the present invention, it is possible to suppress the intrusion of foreign matter into the case by the lid member, and it is possible to improve the beauty because the inside of the case cannot be seen from the opening.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of a remote control relay according to the present embodiment, FIG. 2 is a perspective view of a cover forming a case of the remote control relay, and FIG. 3 is an exploded perspective view of the remote control relay.

  The remote control relay 1 includes a case 2 including a substantially bottomed rectangular tube-shaped body 3 made of an insulating synthetic resin and a cover 4 covering the opening surface of the body 3.

  Four through holes 3b and 4b are formed in the bottom wall portions 3a and 4a of the body 3 and the cover 4, respectively, and one surface of the body 3 and the cover 4 is formed in each of the through holes 3b and 4b. The body 3 and the cover 4 are integrated by inserting the caulking pin 5 from the side and caulking the tip (opposite side of the head 5a; not shown) exposed on the other surface side. ing.

  The body 3 includes a bottom wall portion 3a having a substantially rectangular plate shape and a side wall portion 3c that is suspended from the peripheral portion thereof, and is formed in a substantially bottomed rectangular tube shape. The side wall 3c on one short side of the bottom wall 3a is recessed so as to be cut out in the long side direction, and the main connection terminals 8 and 9 of the fixed contact 6 and the movable contact 7 are formed in the recessed portion. Screwed and fixed. The fixed contact 6 is fitted in a slit-like cutout 3d formed in the side wall 3c.

  Further, a notch 3e is formed in the side wall 3c facing the side wall 3c to which the main connection terminals 8 and 9 are fixed, and the energization terminal of the electromagnet block 10 (polar electromagnet apparatus) is formed from the notch 3e. 11 is exposed with almost no gap. The side wall 3c is also formed with a notch 3f that exposes the manual operation portion 14a of the interlocking lever 14 that is swingably provided on the electromagnet block 10.

  On the other hand, the cover 4 includes a substantially rectangular plate-like bottom wall portion 4a and a side wall portion 4c suspended from the peripheral edge portion. The side wall portion 4c is generally formed lower than the side wall portion 3c of the body 3, but as shown in FIG. 2, the side wall portion 4c is partially raised in the vicinity of the fixed portion of the main connection terminals 8 and 9, as shown in FIG. As shown, the height is substantially the same as the side wall portion 3 c of the body 3. Then, a deep rectangular cutout 4d is formed on the edge of the portion of the side wall portion 4c that is formed high toward the bottom wall portion 4a. As shown in FIG. 1, the side wall portion 3c of the body 3 and the cover 4 is formed. , 4c are attached to each other to form the case 2, and the substantially rectangular opening 12 is formed by the notch 4d and the edge of the side wall 3c of the body 3.

  As shown in FIG. 3, various components such as a fixed contact 6 and a movable contact 7 are accommodated in the case 2 in addition to the electromagnet block 10.

  The electromagnet block 10 is swingably supported by a coil (not shown) energized through the energization terminal 11, a plunger 13 that moves forward and backward by controlling energization of the coil, and a main body of the electromagnet block 10. Interlocking lever 14. The interlocking lever 14 swings as the plunger 13 moves back and forth.

  The fixed contact 6 is fixed to the body 3, while the movable contact 7 is attached to the interlocking lever 14 and swings together with the interlocking lever 14. The fixed contact 6 and the main connection terminal 8 for the fixed contact 6 are integrally formed by bending one metal conductor, while the movable contact 7 and the main connection terminal 9 for the movable contact 7 are formed. Are connected via a flexible braided wire 15 made of a copper-based material.

  In such a configuration, at the position where the plunger 13 protrudes from the main body portion of the electromagnet block 10, the contact 6a of the fixed contact 6 and the contact 7a of the movable contact 7 come into contact with each other, and the circuit between the main connection terminals 8 and 9 is closed. At the position where the plunger 13 is pulled inside the main body of the electromagnet block 10, the contact 6a of the fixed contact 6 and the contact 7a of the movable contact 7 are separated from each other so that the circuit is opened. In this embodiment, a coil spring 16 is provided as an urging means for urging the movable contact 7 toward the fixed contact 6 so as to increase the contact pressure when the contacts 6a and 7a are in contact with each other. is there. Further, a partition wall 17 is provided between the fixed contact 6 and the movable contact 7 to ensure a more reliable insulation state. Further, the interlock lever 14 is provided with a manual operation portion 14a exposed outside the case 2, and the interlock lever 14 is moved by the operation of the manual operation portion 14a, so that the opening / closing of the circuit can be manually switched. ing.

  Here, the operation of the remote control relay 1 will be described. First, when the coil in the electromagnet block 10 is energized through the energizing terminal 11 in the direction in which the plunger 13 protrudes, the interlock lever 14 rotates with the protrusion of the plunger 13. The contact 7a of the movable contact 7 contacts the contact 6a of the fixed contact 6, and the circuit between the main connection terminals 8 and 9 is closed. Note that the state in which the contacts 6a and 7a are in contact with each other is maintained even when the energization of the coil is stopped by the action of a permanent magnet (not shown).

  Next, when the coil is energized in the direction in which the plunger 13 is pulled, the interlock lever 14 is rotated as the plunger 13 is retracted, the contact 7a of the movable contact 7 is separated from the contact 6a of the fixed contact 6, and the main connection is performed. The circuit between terminals 8 and 9 opens.

  When an excessive current exceeding 14000 [A] such as a short circuit current flows in the circuit between the main connection terminals 8 and 9 when the contacts 6a and 7a are opened, the melting point of copper (1083) is instantaneously generated. [° C.]), and the braided wire 15 is vaporized to generate gas. In this embodiment, it is possible to suppress the escape of the gas from the opening 12 and increase the internal pressure of the case 2.

  Here, the opening portion 12 is formed in the recessed portion of the side wall portions 3 c and 4 c in the vicinity of the fixed portion of the main connection terminals 8 and 9. As is clear from FIG. 1, the opening 12 is formed at a position facing the external wiring 20 connected to the main connection terminals 8, 9 on the side walls 3 c, 4 c of the case 2.

  The opening 12 is preferably covered with a lid member 18 as shown in FIG. The lid member 18 is bonded to the side wall portions 3c and 4c of the case 2 with a bonding strength that is peeled off at a pressure lower (sufficiently lower) than the pressure at which the case 2 cracks when the internal pressure of the case 2 rises (for example, adhesion) ) In addition, as the lid member 18, a cloth or a plate-like member can be used, and a name plate describing predetermined information can also be used as the lid member 18.

  According to the present embodiment described above, since the opening portion 12 for releasing the gas generated by the braided wire 15 being vaporized is formed in the side wall portions 3c and 4c as the case outer wall, the internal pressure of the case 2 is increased. Can be prevented from cracking.

  Further, according to the present embodiment, the case 2 includes, as outer walls, a pair of bottom wall portions 3a and 4a facing each other, and side wall portions 3c and 4c provided between the peripheral edges of the bottom wall portions 3a and 4a, And the opening 12 is provided at a position facing the external wiring 20 connected to the main connection terminals 8 and 9 of the fixed contact 6 or the movable contact 7 of the side walls 3c and 4c. Since the external wiring 20 is interposed between the inner wall surface of the housing (distribution panel housing or the like; not shown) in which the battery is housed, there is a gap between the side wall portions 3c, 4c and the inner wall surface. Can be ensured more reliably, and gas can be prevented from being locally filled in the casing and causing a short circuit.

  Further, according to the present embodiment, since the lid member 18 that closes the opening 12 is attached to the side walls 3c and 4c as outer walls, it is possible to suppress the entry of foreign matter into the case 2 and the opening 12 Therefore, the aesthetics can be improved as much as the inside of the case 2 becomes invisible.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the above embodiment, the opening is formed by the notch 4d provided in the side wall 4c of the cover 4, but the opening may be formed by a notch provided on the side of the side wall 3c of the body 3 or both. You may form in another part.

The perspective view which shows the external appearance of the remote control relay concerning one Embodiment of this invention. The perspective view of the cover which makes the case of the remote control relay concerning one Embodiment of this invention. The disassembled perspective view of the remote control relay concerning one Embodiment of this invention.

Explanation of symbols

1 Remote control relay 2 Case 3a, 4a Bottom wall (outer wall)
3c, 4c Side wall (outer wall)
6 Fixed contact 7 Movable contact 8, 9 Main connection terminal (connection terminal)
10 Electromagnet block (polar electromagnet device)
12 Opening 13 Plunger 15 Braided wire 18 Lid member 20 External wiring

Claims (3)

A polarized electromagnet device in which a plunger moves forward and backward by controlling energization to the coil in the case, and opens and closes the main contact between the fixed contact and the movable contact as the plunger moves forward and backward, and the movable contact and its connection terminal In the remote control relay connected between the two with a braided wire,
2. A remote control relay according to claim 1, wherein an opening is formed in the outer wall of the case for allowing gas generated by the braided wire to vaporize. The case includes, as the outer wall, a pair of bottom wall portions facing each other, and a side wall portion provided between the peripheral edges of the bottom wall portions,
2. The remote control relay according to claim 1, wherein the opening is provided at a position of the side wall facing an external wiring connected to a connection terminal of the fixed contact or the movable contact. The remote control relay according to claim 1, wherein a lid member that closes the opening is attached to the outer wall.

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