JP2007018914A - Electromagnetic relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of enabling a large current by reducing temperature rise by suppressing generation of heat during irregular electrification and capable of easily electrically separating each fixed terminal without changing size. <P>SOLUTION: In this electromagnetic relay, a terminal fixed block 11 is fixed in a central part of an insulation base 10 and press fitted and fixed in a position where two electromagnetic blocks become point symmetry so that a movable contact 26 provided in the electromagnetic block 20 faces a makeup side and break side fixed contact point 12a, 13a. The terminal fixed block 11 is provided with a press-in part 13c to the insulation base 10 of a leg part of the break side fixed terminal 13. Slit parts 12d, 13d are provided at center of the electric connecting part 14 of the makeup side and break side fixed terminals 12, 13, exposed outside of a fixed block part 11a of the terminal fixed block 11 and cut in the midsection part of the electric connecting part 14. Thus, the makeup side and break side fixed terminals 12, 13 can be electrically isolated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electromagnetic relay, and more particularly to an electromagnetic relay used in automobile electrical equipment, industrial equipment, home appliances, and the like.

  In recent years, with the upgrading of automobiles, electromagnetic relays (electromagnetic relays) are frequently used to control electrical devices used for automatic door locks, power windows, and the like of the automobiles. The basic function of the electric device is to control the forward / reverse current to the electric load in order to rotate the armature of the motor or the plunger of the solenoid forward / reversely or forward / reversely. For this reason, at least two electromagnetic relays are required for these electric devices, and those that are housed in one case are mainly used. For example, an electromagnetic relay disclosed in Patent Document 1 is used. There is a device.

  The conventional electromagnetic relay shown in FIG. 4 includes an insulating base 110, two electromagnetic blocks 120 having a movable contact 126 and a movable contact spring 124 interlocked with an armature 125, and a substantially U-shaped terminal. Insulates the make side fixed contact terminal 112 provided with the make side fixed contact 112a at the two outer sides of the end portion and the break side fixed terminal 113 provided with the break side fixed contact 113a at the two inside portions of the substantially U-shaped terminal. It is composed of a terminal fixing block 111 arranged so that the fixed contacts on the make side and the break side face each other by being integrally formed with the members.

  Further, the central portion of the electrical connection portion between the make side and the break side terminal of the terminal fixing block 111 is exposed to the outside of the block, and the break side serves as a press-fit portion 113c to the insulating base 110. Further, the terminal fixing block 111 is provided with a through hole 113f that can cut the electrical connection part on the break side as necessary.

  Further, in this electromagnetic relay device, the terminal fixing block 111 is fixed to the center of the insulating base 110, and the movable contact 124 provided with the two electromagnetic blocks 120 includes the fixed contacts 112a and 113a. The two blocks are arranged so as to be opposed to each other at a point-symmetrical position and are press-fitted and fixed.

  Here, when each fixed contact is electrically independent, as shown in FIG. 5, a slit 112d is provided at the center of the make-side fixed terminal 112 of the terminal fixing block 111, and a cutting position (notch) is provided. This is realized by cutting at 112x, and by cutting a portion of a through hole 113f provided in advance at the break side fixed contact terminal 113 at a cutting position (cutting portion) 113x.

  Also, in the control of motors, solenoids, etc., in an electromagnetic relay device that supplies tens of amperes, malfunctions are caused by the heat generated by contacts, terminals, movable springs, etc. that form a current-carrying path, or by temperature rise due to heat generated from the coil. May occur.

  Therefore, it is necessary to reduce the temperature rise inside the electromagnetic relay device. In order to meet this requirement, it is necessary to derive the heat generated inside the relay to dissipate it, or to reduce the electrical resistance of the fixed terminal in order to suppress the generation of heat. Must be increased.

Japanese Utility Model Laid-Open No. 04-027474

  In the conventional terminal fixing block, in order to make each contact independent, the terminal must be cut at each terminal cutting position 113x from each through hole 113f in FIG.

  However, in order to increase the cross-sectional area of the fixed contact terminal, it is necessary to increase the plate thickness, and accordingly, the area of the through hole in the break side cut portion must be reduced. An accurate molding machine and press machine are required, resulting in high costs. Further, as a countermeasure for this, there is an increase in the size of the terminal fixing block, but there is a disadvantage that the size of the electromagnetic relay device itself is increased accordingly.

  Therefore, the present invention increases the cross-sectional area of the fixed terminal in order to reduce the electric resistance of the fixed terminal without increasing the size of the electromagnetic relay (electromagnetic relay device), thereby ensuring sufficient heat dissipation and high capacity ( It is an object of the present invention to provide an electromagnetic relay that can increase the current and can easily make each fixed contact independent when necessary.

  The present invention has been made to achieve the above object, and includes a make-side fixed contact terminal provided with contacts at two locations outside an end portion of the substantially U-shaped terminal, and an end portion of the approximately U-shaped terminal. Break-side fixed contact terminals provided with contacts at two locations inside are integrally formed with an insulating member to form a terminal-fixing block in which the make-side and break-side fixed contacts are opposed to each other. In addition, the center part of the electrical connection part of the break side terminal is exposed to the outside of the fixed block part, and a terminal fixing block having a press-fitting part to the insulating base is provided on the leg part of the break side fixed terminal. An electromagnetic relay is obtained.

  Further, according to the present invention, when it is desired to make each fixed terminal electrically independent, a slit is provided in advance in a portion exposed to the outside of the fixed block portion of the terminal fixed block, and is realized by cutting there. To do.

  In addition, according to the present invention, by providing the press-fitting portions to the insulating base on both sides of the terminal fixing block, the cutting position when each fixing terminal is made independent can be set to the center portion, Thus, an electromagnetic relay characterized in that a through hole for cutting is unnecessary is obtained.

  In addition, the structure of the routing portion of the electrical connecting portion can be simplified, the thickness and width of the terminal can be easily increased, and the electrical resistance can be reduced without increasing the size of the terminal fixing block. An electromagnetic relay characterized by the above can be obtained.

  That is, according to the present invention, the core having the fixed yoke at one end around which the coil is wound and the movable contact linked to the armature that is attracted by energizing the coil disposed opposite to the other end of the core are provided. An electromagnetic block having a movable contact spring, a make side fixed contact terminal having contacts at two locations outside the end of the substantially U-shaped terminal, and contacts at two locations inside the end of the approximately U-shaped terminal. The break-side fixed contact terminal is integrally formed with an insulating member, so that the make-side and break-side fixed contacts are arranged so as to face each other, and an insulating base. The terminal fixing block is press-fitted and fixed, and the two electromagnetic blocks are point-symmetric so that the movable contact of the electromagnetic block is opposed to the fixed contact. In the electromagnetic relay formed by press-fitting and fixing at a position, the terminal fixing block includes a press-fitting portion to the insulating base at a leg portion of the break-side fixing terminal, and an electrical connection portion between the make side and the break-side fixing terminal A slit portion is provided in the center of the terminal, and the slit portion is exposed to the outside of the fixing block portion of the terminal fixing block, and is cut at the central cutting portion of the electrical connecting portion, thereby electrically connecting the make side and break side fixing terminals. An electromagnetic relay characterized in that it can be isolated independently is obtained.

  According to the present invention, the slit portion provided in the center of the electrical connection portion of the make side and break side fixed terminals is exposed to the outside of the fixed block portion of the terminal fixing block, and the slit portion is exposed at the central cut portion of the exposed electrical connection portion. The make side and the break side fixing terminals can be easily made electrically independent by cutting. Accordingly, since the slit portion can be easily cut at the exposed central cutting portion of the electrical connection portion, the plate thickness and plate width of the make side and break side fixing terminals can be increased, and the size of the terminal fixing block is increased. Therefore, the electrical resistance of the make side and break side fixed terminals can be lowered.

  Hereinafter, the best mode of the present invention will be specifically described.

  FIG. 1 is a perspective view of an electromagnetic relay according to the present invention. FIG. 2 is an exploded perspective view of the electromagnetic relay according to the present invention. FIG. 3 is an explanatory view of a terminal fixing block used in the electromagnetic relay according to the present invention, FIG. 3 (a) is a front view, and FIG. 3 (b) is a side view.

  1 and 2, the electromagnetic relay 1 includes a core 21 around which a coil 22 is wound, a yoke 23 fixed to one end of the core 21, and the other end of the core 21 that is disposed opposite to the coil 22. The armature 25 attracted | sucks to the core 21 by electricity supply, and the two electromagnetic blocks 20 which have the movable contact 26 which has the movable contact 26 and interlock | cooperates with the armature 25 are provided.

  Furthermore, a make side fixed terminal 12 provided with make side fixed contacts 12a at two outer sides of the end portion of the substantially U-shaped terminal, and a break side fixed contact 13a provided at two locations inside the end portion of the approximately U shape terminal. The break-side fixed terminal 13 is integrally formed with an insulating member, thereby having a terminal-fixing block 11 arranged so that the make-side and break-side fixed contacts 12a and 13a face each other.

  This terminal fixing block 11 is provided with a press-fit portion 13c to the insulating base 10 at the leg portion of the break side connection terminal 13b, and the center portion of the electrical connection portion 14 of the make side and break side fixing terminals 12 and 13 is a terminal fixing block. 11 is exposed outside the fixed block portion 11a.

  In addition, the electromagnetic relay 1 is electromagnetically fixed so that the terminal fixing block 11 is press-fitted and fixed at the center position of the insulating base 10, and the movable contact 26 of the electromagnetic block 20 is opposed to the make side and break side fixed contacts 12a and 13a on both sides thereof. The block 20 is arranged, and the two electromagnetic blocks 20 are press-fitted and fixed at positions where the two electromagnetic blocks 20 are point-symmetric.

  Here, the structure of the terminal fixing block 11 will be described with reference to FIG. 3A is a front view, and FIG. 3B is a side view. Further, the press-fit portion 13c to the insulating base 10 is formed at the leg portion of the break side connection terminal 13d. The break-side terminal fixing frame 13e at the center exposed portion is a portion used for fixing terminals when the make-side or break-side fixing terminals 12 and 13 are integrally formed. Cut at 13x.

  Further, when a pair of terminals constituted by the make side fixed terminal 12 and the break side fixed terminal 13 are electrically independent, the slit portion 12d formed in the make side fixed terminal 12 is formed before being incorporated into the insulating base. It implement | achieves by cut | disconnecting beforehand in the position of the center cutting part 12x of the electrical connection part 14 including.

  Next, effects of the embodiment according to the present invention will be described. Table 1 shows the size of the terminal fixing block and the break side fixing contact in the terminal fixing block in which the plate thickness of the make side and break side fixing terminals is increased from 0.4 mm (conventional product) to 0.7 mm (product of this embodiment). The result of having compared the electrical resistance between connection terminals is shown.

  As is clear from Table 1, according to the fixed terminal block of the present invention, the electrical resistance between the fixed contact and the connection terminal (make side and break side) can be halved without changing the size of the fixed terminal block. .

  The electromagnetic relay according to the present invention requires drive control of a relatively large current such as a motor or a solenoid, and is suitable for application to an electromagnetic relay of automobile electrical equipment that generates a large amount of heat, and can also be used for industrial equipment, home appliances, etc. It is.

The perspective view of the electromagnetic relay concerning this invention. The disassembled perspective view of the electromagnetic relay concerning this invention. Explanatory drawing of the terminal fixing block used for the electromagnetic relay concerning this invention. 3A is a front view, and FIG. 3B is a side view. The disassembled perspective view for demonstrating the conventional electromagnetic relay. The front view of the terminal fixing block used for the conventional electromagnetic relay.

Explanation of symbols

1 Electromagnetic relay 10, 110 Insulation base 10a, 110a Terminal fixing block press-fitting hole 10b, 110b Electromagnetic block press-fitting hole 11, 111 Terminal fixing block 11a Fixed block part 12, 112 Make side fixed terminal 12a, 112a Make side fixed contact 12b, 112b Make side connection terminals 12d, 112d Slit part 12x Center cut part 112x Notch part 13, 113 Break side fixed terminal 13a, 113a Break side fixed contact 13b, 113b Break side connection terminal 13c, 113c Press fit part 13d, 113d Slit part 13e Break Side terminal fixing frame 13f, 113f Through hole 13x Central cutting part 113x Cutting position 14, 114 Electrical connection part 20, 120 Electromagnetic block 21, 121 Core 22, 122 Coil 23, 123 Yoke 24, 124 Movable Point spring 25, 125 the armature 26, 126 movable contact 27, 127 hinge portion 28, 128 common terminal 29, 129 coil terminal

Claims (1)

  An electromagnetic comprising a core having a fixed yoke at one end around which a coil is wound and a movable contact spring disposed opposite to the other end of the core and having a movable contact linked to an armature attracted by energization of the coil Break side fixed contact terminal with a block and a make side fixed contact terminal provided with a make side fixed contact outside the end of the substantially U-shaped terminal and a break side fixed contact inside the end of the substantially U-shaped terminal It is composed of a terminal fixing block that is arranged so that the fixed contacts on the make side and the break side face each other by integrally molding the insulating member with an insulating base, and the terminal fixing block is fixed to the central portion of the insulating base In addition, the two electromagnetic blocks are pressed so that the movable contact provided in the electromagnetic block faces the fixed contact, and the two electromagnetic blocks are point-symmetric with each other. In the fixed electromagnetic relay, the terminal fixing block includes a press-fit portion to the insulating base at a leg portion of the break side fixing terminal, and a slit at the center of the electrical connection portion of the make side and the break side fixing terminal. Providing a slit, exposing the slit portion to the outside of the fixed block portion of the terminal fixing block, and cutting the central cutting portion of the electrical connecting portion to make the make side and break side fixed terminals electrically independent. Characteristic electromagnetic relay.

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