JP2007294256A - Electromagnetic switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic switching device capable of improving vibration-resistant properties at the connection between winding for excitation and an external terminal. <P>SOLUTION: In the electromagnetic switching device where an electromagnet block 1 and a contact block 2 are stored in a case 3 formed by connecting a body 30 and a cover 31, a pair of external terminals 4 is inserted into an insertion hole piercing both the left and right sides on the lower surface of the body 30. The external terminal 4 comprises a tap blade 4a and a plate 4c connected to the external power supply electrically; and a bundling section 40 connected to the winding 10 for excitation electrically, and a support 41 that is insert-molded to a coil bobbin 11 in the electromagnet block 1 and supports the electromagnet block 1, so that it does not come into contact with the inner wall of the case 3 is integrated with the plate 4c. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electromagnetic switch suitable for a power load relay, an electromagnetic switch or the like.

Conventionally, as this kind of electromagnetic switching device, as shown in FIG. 5, an electromagnetic block 1 and a contact block 2 are accommodated in a case 3 made of an insulating material such as synthetic resin (for example, a patent). Reference 1). As shown in FIG. 6, the case 3 includes a body 30 formed in a substantially L shape and a substantially box-shaped cover 31 having a surface facing the body 30 opened. The electromagnet block 1 is movable between a fixed iron core (not shown) and a position in contact with the fixed iron core and a position away from the fixed iron core in a part of a magnetic path through which the magnetic flux generated by the exciting winding 10 passes. A movable iron core (not shown) is included, and the movable iron core is brought into contact with and separated from the fixed iron core when the excitation winding 10 is turned on and off. Here, the movable iron core has a movable contact (not shown) provided with a pair of movable contacts (not shown) so that the contacts of the contact block 2 are opened and closed in conjunction with the movement of the movable iron core. They are connected via a connecting shaft (not shown) made of a nonmagnetic material. Each movable contact is provided with a fixed contact (not shown) provided on the fixed terminal 20 of the contact block 2 so as to face the movable contact. When the movable core is in contact with the fixed core, the movable contact is fixed to the movable contact. A contact consisting of contacts is closed. On the other hand, the contact is opened when the movable core is separated from the fixed core by the spring force of a return spring (not shown) provided between the fixed core and the movable core. In addition, as shown in FIG. 5, a pair of plate-like permanent magnets 5 a arranged in parallel with the contact block 2 interposed therebetween, and a substantially U-shape covering the permanent magnet 5 a and the contact block 2, around the contact block 2. A die yoke 5 is provided, and by these magnetic actions, the arc generated when the contact is opened is stretched to improve the breaking performance. By the way, when the movable iron core contacts the fixed iron core, the movable iron core collides with the fixed iron core, so that vibration is generated in the electromagnet block 1. Therefore, as shown in FIG. 5, the electromagnet block 1 is indirectly fixed to the case 3 via the buffer member 7, so that vibration propagating from the electromagnet block 1 to the case 3 is reduced and noise reduction is achieved. ing.
Energization of the exciting winding 10 is provided on the electromagnet block 1 and the other end of the pair of external terminals 4 that protrude from the lower surface of the body 30 in FIG. 5 and has one end connected to an external power source (not shown). Then, one end is connected to the other end of the pair of coil terminals 6 connected to the exciting winding 10, and power is supplied from an external power source. As shown in FIG. 7A, the external terminal 4 is formed in a substantially L shape from a conductive material, and has a substantially rectangular plug blade 4a inserted into a connector or the like at one end. A substantially U-shaped fitting portion 4b is formed to protrude from the substantially rectangular plate portion 4c. The external terminal 4 and the coil terminal 6 are mechanically and electrically connected by fitting and soldering the tip of the coil terminal 6 formed in a substantially rectangular shape from a conductive material to the fitting portion 4b. (Refer FIG.7 (b)).
JP-A-11-232986

  By the way, in the above conventional example, since the electromagnet block 1 is indirectly fixed to the case 3 via the buffer member 7, the external terminal 4 provided on the body 30 is fixed when the electromagnet block 1 vibrates. Since the coil terminal 6 provided in the electromagnet block 1 vibrates without any change, stress is applied to each terminal, and there is a possibility that the external terminal 4 and the coil terminal 6 may be poorly connected due to peeling of the solder. There was a problem.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an electromagnetic switching device capable of improving vibration resistance at a connection portion between an excitation winding and an external terminal.

  In order to achieve the above object, the present invention provides an exciting winding, a fixed iron core that is magnetized by energizing the exciting coil, and an exciting coil that is arranged in a form facing the fixed iron core. When the power is turned on and off, the electromagnetic block is equipped with a movable core that is movable between the position where it is attracted to the fixed core and abuts and the position away from the fixed core, and opens and closes in conjunction with the movement of the movable core An electromagnetic switchgear comprising a contact block having a contact point and a case for housing an electromagnet block and a contact block, wherein the case is inserted through a pair of external terminals connected to an external power source. The external terminal is connected to an external power source with one end inserted through the insertion hole, and the other end is electrically connected to the excitation winding by winding the excitation winding. Attached to the electromagnet block Characterized by comprising a support portion for supporting so as not to contact the stone blocks to the case inner wall.

  According to a second aspect of the present invention, in the first aspect of the invention, the external terminal includes a locking portion that protrudes in a direction orthogonal to the direction of insertion through the insertion hole at one end, and the case is provided in the vicinity of the insertion hole. A locked portion that is locked by the locking portion is provided.

  According to a third aspect of the present invention, in the first aspect of the invention, the external terminal is provided with a contact portion at the other end that contacts the periphery of the insertion hole in a state where the one end is inserted through the insertion hole. To do.

  According to the first aspect of the present invention, the case is provided with an insertion hole penetrating a pair of external terminals connected to an external power source on one side of the case, and one end of the external terminal is inserted into the insertion hole. It is connected to the power source, and the other end is wound with the exciting winding so that it is electrically connected to the exciting winding, and attached to the electromagnetic block so that the electromagnetic block does not come into contact with the inner wall of the case Since the supporting part for supporting is provided, since the connection between the external power source and the excitation winding is performed by one component, it is possible to prevent the connection failure due to the vibration of the electromagnet block, and thus the vibration resistance. Can be improved. Moreover, since it is not necessary to provide a coil terminal separately as in the conventional example, the number of parts can be reduced and the cost can be reduced. Furthermore, since the electromagnet block is supported by the support portion so as not to contact the inner wall of the case, it is possible to suppress vibration from propagating to the case, and thus to reduce the noise of the apparatus.

  According to the second aspect of the present invention, the external terminal includes the locking portion that protrudes in a direction orthogonal to the direction of insertion through the insertion hole at one end, and the locking portion is engaged with the case in the vicinity of the insertion hole. Since the locked portion to be stopped is provided, it is possible to prevent the external terminal from coming out of the insertion hole. In addition, since the locking portion plays a role of positioning the external terminal by locking to the locked portion, the assemblability can be improved.

  According to the invention of claim 3, since the external terminal is provided with the contact portion that contacts the peripheral edge of the insertion hole in a state where the one end portion is inserted through the insertion hole, the contact portion is formed of the insertion hole. It is possible to prevent the inclination of the external terminal by abutting on the peripheral edge, and therefore, the support of the electromagnet block by the support portion can be made stronger. In addition, since the abutment portion also plays a role of positioning the external terminal, it is possible to improve assemblability.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, since the basic configuration of the present invention is the same as that of the conventional example, the same parts as those of the conventional example are denoted by the same reference numerals as those of the conventional example, and the description thereof is omitted. In the following description, the vertical direction in FIG. 1A is defined as the vertical direction, the horizontal direction is defined as the front-rear direction, the near side is defined as the right direction, and the far side is defined as the left direction.
In this embodiment, as shown in FIG. 1A, the electromagnet block 1 and the contact block 2 are housed in a case 3 formed by combining a body 30 and a cover 31. A pair of external terminals 4 are respectively inserted into insertion holes (not shown) that are respectively penetrated (one in the figure).
As shown in FIG. 1A, the electromagnet block 1 includes a hollow cylindrical coil bobbin 11 around which an excitation winding 10 is wound, a pair of flange portions 11 a provided at both front and rear ends of the coil bobbin 11, It consists of a yoke 12 covering both sides. The coil bobbin 11 accommodates the fixed iron core and the movable iron core shown in the conventional example, and the fixed iron core and the movable iron core together with the yoke 12 form a magnetic path through which the magnetic flux generated by energizing the exciting winding 10 is passed. is doing. Further, a substantially rectangular wall portion 13 protruding forward is integrally formed at the lower end edge of the flange portion 11a at the front end of the coil bobbin 11, and the external terminal 4 and the yoke 12 are externally formed by the wall portion 13. The insulation with the metal part of the vicinity of the terminal 4 is aimed at.
As shown in FIG. 1B, the external terminal 4 is formed in a substantially L shape by bending a metal plate, and includes a substantially rectangular plug blade 4a and a plate portion 4c. The plug blade 4a is inserted into the insertion hole of the body 30 from above so that the lower end portion faces the outside of the case 3, and the lower end portion is inserted into a connector (not shown) or the like to be connected to an external power source. Connected. The plate portion 4 c is integrally formed with a substantially rectangular binding portion 40 projecting forward and a substantially rectangular support portion 41 projecting rearward. The plug blade 4 a is formed on the body 30. In a state of being inserted through the insertion hole, the body 30 is disposed inside the case 3 with a certain distance from the lower surface of the body 30 in the vertical direction.
Although not shown, one end of the exciting winding 10 of the electromagnet block 1 is wound around the binding portion 40, and the external terminal 4 and the exciting winding 10 are electrically connected. As shown in FIG. 1A, the support portion 41 is insert-molded on the lower end side of the flange portion 11 a at the front end of the coil bobbin 11, and the electromagnet block 1 is placed in the case where the plug blade 4 a is inserted through the insertion hole of the body 30. 3 is supported so as not to contact the inner wall. In addition, although not shown in figure, the notch is provided in the site | part which covers the collar part 11a of the coil bobbin 11 front end of the yoke 12, and the support part 41 and the yoke 12 are made to pass through this notch. It is designed not to touch.
As described above, the plug blade 4a that electrically connects the external terminal 4 to the external power source and the plate portion 4c that integrally forms the binding portion 40 that is electrically connected to the exciting winding 10 are configured. Therefore, the connection between the external power supply and the excitation winding 10 can be performed only by the external terminal 4, and therefore, the connection between the external terminal 4 and the coil terminal 6 is caused by the vibration of the electromagnet block 1 as in the conventional example. Therefore, vibration resistance can be improved. Moreover, since the support part 41 which supports the electromagnet block 1 so that it may not contact | abut with the inner wall of the case 3 was integrally formed with the board part 4c, it can prevent that the vibration of the electromagnet block 1 propagates to the case 3, Therefore, it is possible to reduce the noise of the apparatus.
By the way, as shown in FIG.2 (b), you may provide the latching | locking part 42 which protrudes in the left-right direction in the both sides along the up-down direction of the plug blade 4a, respectively. In this case, a locked portion (not shown) is drilled in the vicinity of the insertion hole of the body 30, and the plug blade 4a is inserted into the insertion hole of the body 30 as shown in FIG. Since the locking portion 42 is locked to the locked portion, it is possible to prevent the external terminal 4 from coming out of the insertion hole, and further to improve the assemblability because it also serves to position the external terminal 4. it can.
Further, as shown in FIG. 3B, the contact portions 43a and 43b protruding downward may be formed integrally with the plate portion 4c. The contact portions 43a and 43b are both substantially rectangular, and one contact portion 43a is formed integrally with the left end portion of the plate portion 4c, and the other contact portion 43b is a support portion at the rear side of the plate portion 4c. It is integrally formed in the vicinity of 41. As shown in FIG. 3A, these contact portions 43a and 43b contact the peripheral edge of the insertion hole while the blade 4a is inserted through the insertion hole of the body 30, so that the external terminal 4 is inclined. Therefore, the support of the electromagnet block 1 by the support portion 41 can be made stronger. Moreover, since the role of the positioning of the external terminal 4 is also fulfilled, the assemblability can be improved.
Furthermore, as shown in FIG. 4B, both the locking portion 42 and the contact portions 43 a and 43 b may be provided on the external terminal 4. In this case, the effects of the locking portion 42 and the contact portions 43a and 43b are exhibited.

It is a figure which shows the electromagnetic switching device of embodiment of this invention, (a) is a right view, (b) is an expansion perspective view of an external terminal. It is a figure which shows the case where a latching | locking part is provided in the external terminal same as the above, (a) is a right view, (b) is an expansion perspective view of an external terminal. It is a figure which shows the case where a contact part is provided in the external terminal same as the above, (a) is a right view, (b) is an expansion perspective view of an external terminal. It is a figure which shows the case where a latching | locking part and a contact part are provided in the external terminal same as the above, (a) is a right view, (b) is an expansion perspective view of an external terminal. It is a right view which shows the conventional electromagnetic switch. It is an assembly perspective view same as the above. It is attachment explanatory drawing of an external terminal and a coil terminal same as the above, (a) is a figure which shows before attachment, (b) is a figure which shows after attachment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnet block 2 Contact block 3 Case 4 External terminal 40 Tying part 41 Support part 42 Locking part 43 Contact part

Claims (3)

  The exciting winding, the fixed iron core that is magnetized by energizing the exciting coil, and the fixed winding core are arranged facing the fixed iron core. An electromagnet block having a movable iron core movable between a contact position and a position away from the fixed iron core, a contact block having contacts that open and close in conjunction with the movement of the movable iron core, and the electromagnet block and the contact block An electromagnetic switchgear including a case to be stored, wherein the case has an insertion hole through which a pair of external terminals connected to an external power source are inserted in one surface, and one end of the external terminal is an insertion hole Is connected to an external power source, and the other end is wound with an exciting winding to be electrically connected to the exciting winding, and the electromagnetic block is attached to the inner wall of the case. Support so that it does not touch Electromagnetic switching device, characterized in that a supporting portion for.   The external terminal includes a locking portion that protrudes in a direction orthogonal to the direction of insertion through the insertion hole at one end, and the case includes a locked portion that locks the locking portion in the vicinity of the insertion hole. The electromagnetic switching device according to claim 1, wherein the electromagnetic switching device is provided. The electromagnetic switching device according to claim 1, wherein the external terminal includes a contact portion at the other end that contacts the periphery of the insertion hole in a state where the one end is inserted through the insertion hole.

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