JP4458063B2 - Electromagnetic switchgear - Google Patents

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. Further, 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 excitation magnetizing winding 10, the other end of the pair of external terminals 4 having one end formed to protrude on the lower surface is connected to an external power source (not shown) in FIG. 5 of the body 30, the electromagnet block 1 This is done by connecting the other ends of the pair of coil terminals 6 provided at one end to the exciting winding 10 and supplying power 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, a first aspect of the present invention provides a hollow cylindrical coil bobbin around which an excitation winding is wound, a yoke covering both side surfaces in a direction orthogonal to the axial direction of the coil bobbin, and an excitation A fixed iron core that is magnetized by energizing the windings and a position that is opposed to the fixed iron core, and when the energization to the exciting winding is turned on and off, is separated from the position where it is attracted and abutted by the fixed iron core Electromagnetic block having a movable iron core movable between positions, a contact block having contacts that open and close in conjunction with the movement of the movable iron core, and a case for housing the electromagnet block and the contact block It is a switchgear, and the case has an insertion hole through which a pair of external terminals connected to an external power supply are inserted in one surface, and one end of the external terminal is inserted into the insertion hole and connected to the external power supply The other end is excited A tying portion which is electrically connected to the exciting winding by winding a winding, and a support portion for supporting so as not to abut against the electromagnet block to the case inner wall is attached to the electromagnet block, the insertion hole at one end And a locking portion protruding in a direction perpendicular to the direction of insertion into the insertion hole, and the other end portion includes an abutting portion that comes into contact with the peripheral edge of the insertion hole in a state where the one end portion is inserted into the insertion hole. In the vicinity of the insertion hole, a locked portion that the locking portion locks is provided, and the yoke is provided with a notch for passing the support portion so that the support portion does not contact itself It is characterized by.

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. Further, 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 . The external terminal includes a locking portion protruding in a direction orthogonal to the direction of insertion through the insertion hole at one end, and the case has a locked portion that the locking portion locks in the vicinity of the insertion hole. Since it 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. In addition, since the external terminal is provided with a contact portion at the other end in contact with the peripheral edge of the insertion hole in a state where one end is inserted through the insertion hole, the external terminal is in contact with the peripheral edge of the insertion hole. The inclination of the terminal can be prevented, and therefore the support of the electromagnet block by the support portion can be made stronger. Further, since the contact portion also serves to position the external terminal, the assemblability can be improved .

Below, it will be described with reference to the accompanying drawings, embodiments of the present invention. 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).

Electromagnets block 1 as shown in FIG. 1 (a), a hollow cylindrical coil bobbin 11 to the exciting coil 10 is wound, a pair of flange portions 11a and provided on the front and rear end portions of the coil bobbin 11 It consists of a yoke 12 covering both the left and right side surfaces. 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.

External terminals 4, as shown in FIG. 1 (b), is formed into a substantially L-shape by bending a metal plate, made of a substantially rectangular plug pins 4a and the 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.

The fault-up part 40, not shown wound one end portion of the exciting winding 10 of the electromagnet block 1, the external terminals 4 and 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 above mentioned, in the external terminal 4 and blade 4a which is external power supply and electrically connected, a plate portion 4c integrally formed with a tying portion 40 which is electrically connected to the exciting winding 10 Since it is configured, the external power supply and the excitation winding 10 can be connected only by the external terminal 4, and therefore, the connection failure 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. Since it does not occur, 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.

And in time, as shown in FIG. 2 (b), in both sides along the vertical direction of the blade 4a, it may be provided with a locking portion 42 protruding in the lateral direction, 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, the assembly of the external terminal 4 can be improved. it can.

Also, as shown in FIG. 3 (b), the contact portion 43a projecting downward, 43b and may be formed integrally with the plate portion 4c, respectively. 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 plug 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 terminals 4 is also fulfilled, the assemblability can be improved.

Further, the as shown in FIG. 4 (b), the locking portion 42 and the contact portions 43a, 43b may be provided either 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.

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 (1)

A hollow cylindrical coil bobbin around which an exciting winding is wound, a yoke covering both sides in a direction orthogonal to the axial direction of the coil bobbin, a fixed core magnetized by energizing the exciting winding, and a fixed core An electromagnet having a movable iron core which is arranged in a shape facing the magnet and is movable between a position where it is attracted to and abutted by the fixed iron core when the energization to the exciting coil is turned on and off, and a position away from the fixed iron core An electromagnetic switching device comprising a block, a contact block having a contact that opens and closes in conjunction with the movement of the movable iron core, and a case that houses the electromagnet block and the contact block. An insertion hole is inserted through a pair of external terminals connected to the external terminal. One end of the external terminal is inserted into the insertion hole and connected to an external power source, and the other end is excited by winding an excitation winding. For winding and electrically A tying portion to be continued, a supporting portion attached to the electromagnet block supported so as not to contact the electromagnet block to the case inner wall, the engaging projecting in a direction orthogonal to the direction to be inserted into the insertion hole at one end And a contact portion that contacts the periphery of the insertion hole in a state where one end portion is inserted through the insertion hole, and the case has a locking portion locked in the vicinity of the insertion hole. An electromagnetic switching device characterized in that a locked portion is provided, and a notch for passing the support portion is provided in the yoke so that the support portion does not contact with the yoke .

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