JP6320135B2 - Electromagnetic actuator, method for manufacturing electromagnetic actuator, and electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic actuator, a method of manufacturing an electromagnetic actuator, and an electromagnetic relay, which can widely perform an automatic winding operation with a wide interval between coil terminals.

  In a conventional polarized electromagnetic relay (electromagnetic relay), an electromagnetic actuator including an electromagnet and a permanent magnet and a contact portion including a plurality of contact members are assembled in a case insulated from each other, and the electromagnetic actuator and the contact portion Some of them are provided with a force transmission member that is moved by the action of an electromagnetic actuator to open and close the contact member of the contact portion. And the electromagnetic actuator used for such an electromagnetic relay has three or more electromagnets which are supported by being fixed to the winding frame around which the electromagnet winds the conducting wire that forms the coil, and connected to the coil conducting wire. The coil terminal is provided (for example, refer patent document 1). In this type of electromagnetic relay, it is possible to quickly open and close the operation state (contact closed state) and the return state (contact open state) by configuring two excitation circuits. The contact part can be held stably.

JP 2013-251280 A (paragraph “0010”, FIGS. 19 and 20)

In the conventional electromagnetic actuator having a plurality of coil terminals, there is a problem that it is not possible to easily perform an automatic winding operation of forming a coil on a winding frame by connecting a conductive wire between each coil terminal. It was.
In addition, there is a problem in that the conductor wire between the coil terminal and the wound coil is concerned about the disconnection of the conductor wire due to fluctuations in the coil terminal due to vibration or the like.

  The present invention has been made to solve the above-described problems, and in an electromagnetic actuator having three coil terminals, the interval between the coil terminals can be widened, and automatic winding work can be performed. An object is to provide an electromagnetic actuator, a method for manufacturing the electromagnetic actuator, and an electromagnetic relay that can be easily implemented.

The electromagnetic actuator of the present invention is
With bobbin,
A second direction perpendicular to the axial direction and the first direction of the bobbin, and the axial direction projecting in a first direction perpendicular to the axial direction at a central portion of the outer peripheral surface of the bobbin A first coil terminal, a second coil terminal, a third coil terminal formed at different positions in
One end of the winding, one end of the winding and the other end of the winding are connected to any one of the coil terminals, respectively, and the outer peripheral surfaces on both sides of the bobbin across the coil terminals, respectively. A wound first exciting coil and a second exciting coil;
A plunger built in the bobbin;
A yoke formed to be fixed to the bobbin so as to sandwich the first excitation coil and the second excitation coil at positions different from the coil terminals;
A permanent magnet and a magnetic plate are provided between the yoke and the bobbin.

In addition, the manufacturing method of the electromagnetic actuator of the present invention,
Connecting one end of the winding to the first coil terminal;
Winding the winding from the central portion to the bobbin via the first groove portion to form the first exciting coil,
Connecting the winding middle part to the second coil terminal,
Winding the winding from the central portion to the bobbin via the second groove portion to form the second excitation coil,
The other end of the winding is connected to the third coil terminal.

The electromagnetic relay of the present invention is
A case in which the electromagnetic actuator is housed and formed of resin;
A fixed contact formed to be fixed to the case and a movable contact that intermittently connects between the fixed contact in accordance with the movement of the plunger.

  Since the electromagnetic actuator, the electromagnetic actuator manufacturing method, and the electromagnetic relay according to the present invention are configured and performed as described above, the intervals between the coil terminals can be widened, and the coil terminals are arranged in the same direction. Since it protrudes, automatic winding work can be easily performed.

It is a perspective view which shows the structure of the electromagnetic relay of Embodiment 1 of this invention. It is a partial cross-sectional top view of the electromagnetic relay shown in FIG. It is a perspective view which shows the structure of the bobbin and coil terminal by Embodiment 1 of this invention. It is a perspective view which shows the structure of the bobbin before each exciting coil of the electromagnetic actuator shown in FIG. 3 is wound, and each coil terminal. It is a perspective view which shows the structure of the bobbin before each exciting coil of the electromagnetic actuator shown in FIG. 3 is wound, and each coil terminal. It is a top view which shows the structure of the bobbin and each coil terminal of the electromagnetic actuator shown in FIG. It is a figure which shows the manufacturing method of the exciting coil using the bobbin and each coil terminal of the electromagnetic actuator shown in FIG.

Embodiment 1 FIG.
Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a configuration of an electromagnetic relay according to Embodiment 1 of the present invention. 2 is a partial cross-sectional top view of the electromagnetic relay shown in FIG. FIG. 3 is a perspective view showing the configuration of the bobbin and each coil terminal of the electromagnetic actuator of the electromagnetic relay shown in FIG. 4 and 5 are perspective views showing the configuration of the bobbin and each coil terminal before each exciting coil of the electromagnetic actuator shown in FIG. 3 is wound. FIG. 6 is a top view showing the configuration of the bobbin and each coil terminal of the electromagnetic actuator shown in FIG. FIG. 7 is a diagram showing a method of manufacturing an exciting coil using the bobbin and each coil terminal of the electromagnetic actuator shown in FIG.

  1 and 2, the electromagnetic relay 100 includes, for example, a case 1 made of resin and an electromagnetic actuator 30 built in the case 1. And the outer wall of case 1 is provided with a pair of 1st connection terminal 2 and 2nd connection terminal 4 which were formed in order to connect with an external electric circuit. A fixed contact 3 is formed on the first connection terminal 2. A movable contact 5 is formed on the second connection terminal 4 at a position facing the fixed contact 3.

  The electromagnetic actuator 30 includes a bobbin 15 fixed to the case 1 and a first exciting coil 10 and a first exciting coil 10 that are wound and formed on both sides across the central portion 15a of the outer peripheral surface A of the bobbin 15 in the axial direction X. Two excitation coils 11 are provided. A plunger 9 is housed inside the bobbin 15. Moreover, the both ends of the bobbin 15 are provided with a first flange portion 180 and a second flange portion 181 that extend radially outward from the both ends. The first flange portion 180 and the second flange portion 181 serve as a guide portion and a protection portion in the axial direction X of the bobbin 15 of the first excitation coil 10 and the second excitation coil 11.

A yoke 14 formed in a U-shape with a magnetic material so as to sandwich the first excitation coil 10 and the second excitation coil 11 is inserted into the first flange portion 180 and the second flange portion 181 and fixed. Has been. The yoke 14 is formed at a location different from each coil terminal described later. A permanent magnet 12 and a magnetic plate 13 are installed between the yoke 14 and the first excitation coil 10 and the second excitation coil 11 of the bobbin 15.
Furthermore, a rod 8 that is fixed to the plunger 9 and transmits the operation of the plunger 9 to the cross bar 6, and a contact pressure spring 7 that is set between the cross bar 6 and the rod 8 to apply contact pressure to the movable contact 5. Prepare. The plunger 9 has a gap with the yoke 14.

  Then, when the first exciting coil 10 or the second exciting coil 11 is energized, these have the function of an electromagnet, and the plunger 9 is attracted by the electromagnet to the yoke 14 (gap), as shown in FIG. Drives in the vertical direction on the drawing. By the operation of the plunger 9, the movable contact 5 is intermittently connected between the fixed contacts 3. Then, after the current is not supplied to the first exciting coil 10 or the second exciting coil 11, the plunger 9 is configured to hold the position shown in FIG. The electromagnetic relay 100 configured in this way is used for opening and closing an electric circuit as a direct acting relay for a power meter, for example.

  Next, details of the shape of the bobbin 15 will be described with reference to FIGS. The first coil terminal 160, the second coil terminal 161, the first coil terminal 160, and the second coil terminal 161 are arranged between the central portion 15 a of the outer peripheral surface A of the bobbin 15 in the axial direction X, that is, between the axial directions X of the first excitation coil 10 and the second excitation coil 11. Three coil terminals 162 are formed. Each of the coil terminals 160, 161, 162 is formed to project in a first direction Z orthogonal to the axial direction X of the bobbin 15. This protruding direction is formed in a direction opposite to the yoke 14 shown above. Accordingly, the coil terminals 160, 161, 162 and the yoke 14 serve as a guide part and a protection part in the first direction Z of the bobbin 15 of the first excitation coil 10 and the second excitation coil 11.

  In addition, the coil terminals 160, 161, 162 are formed at different positions in the second direction Y and the axial direction X perpendicular to the axial direction X and the first direction Z of the bobbin 15 (see FIG. 6). . Specifically, in the axial direction X, the second coil terminal 161 is on the first exciting coil 10 side, the third coil terminal 162 is on the second exciting coil 11 side, and the first coil terminal 160 is on the second coil terminal 161. And the third coil terminal 162, respectively. The first excitation coil 10 side indicates a position where the first excitation coil 10 is closer to the second excitation coil 11 in the axial direction X of the bobbin 15. The second excitation coil 11 side indicates a position where the second excitation coil 11 is closer to the first excitation coil 10 in the axial direction X of the bobbin 15.

Further, in the second direction Y, the first coil terminal 160 is at the upper part on the drawing of FIG.
The third coil terminal 162 is formed in the lower part of the drawing of FIG. 6, and the second coil terminal 161 is formed between the first coil terminal 160 and the third coil terminal 162. In addition, each coil terminal 160, 161, 162 is formed with a connection portion 163 for winding connection on the tip side and a connection portion 164 for winding connection on the lower end side. The connection part 163 is formed by a semi-circular cutout for connecting a cable between an external circuit (not shown) for operating the first excitation coil 10 and the second excitation coil 11. Is formed. Moreover, the connection part 164 is formed by the rectangular notch. In addition, the shape of these connection parts 163 and 164 is not restricted to this shape, and any shape may be used as long as the winding can be connected.

  Further, the coil terminals 160, 161, 162 are respectively installed on the first installation part 150, the second installation part 151, and the third installation part 152 formed in the central part 15 a of the bobbin 15. The first installation part 150 and the third installation part 152 are formed at symmetrical positions with respect to the axis of the bobbin 15. And the 1st installation part 150 is formed in the one side (upper side on drawing of FIG. 6) position of the 2nd direction Y of the outer diameter 10a of the 1st excitation coil 10 and the 2nd excitation coil 11 and 11a. It has one end face 150a.

  Further, the third installation portion 152 is formed at a position on the other side (the lower side in the drawing of FIG. 6) in the second direction Y of the outer diameters 10 a and 11 a of the first excitation coil 10 and the second excitation coil 11. It has a three-end surface 152a. The first end surface 150a and the third end surface 152a serve as a guide portion and a protection portion in the second direction Y of the first excitation coil 10 and the second excitation coil 11. And the 1st groove part 170 which reaches the 1st exciting coil 10 side of the outer peripheral surface A of the bobbin 15 is formed between the 1st installation part 150 and the 2nd installation part 151 (refer FIG. 4). Moreover, the 2nd groove part 171 which reaches the 2nd exciting coil 11 side of the outer peripheral surface A of the bobbin 15 is formed between the 1st installation part 150 and the 3rd installation part 152 (refer FIG. 5). The third end surface 152a is formed with a through portion 172 cut out from the outside in the second direction Y.

  The bobbin 15 is made of an insulating material as a resin molded product, for example. Each coil terminal 160, 161, 162 is fixed to the bobbin 15 by press-fitting or simultaneous molding. As described above, the first coil terminal 160, the second coil terminal 161, and the third coil terminal 162 can be arranged with sufficient intervals. The arrangement of the coil terminals 160, 161, and 163 is not limited to the example described above, and the central portion 15a of the bobbin 15 is located at different positions in the second direction Y and the axial direction X. Other arrangements may be used as long as they are formed.

  Next, a manufacturing method for manufacturing the exciting coils 10 and 11 by winding the winding around the bobbin of the manufacturing method of the electromagnetic actuator configured as described above will be described with reference to FIG. First, one end W1 of the winding is connected to the connection portion 163 of the first coil terminal 160 at least once in a counterclockwise direction. Next, the restriction pin 40 is inserted between the second coil terminal 161 and the third coil terminal 162 from the lower side in the drawing through the through portion 172. Next, after the winding is connected to the first coil terminal 160, the central portion 15a of the bobbin 15 is assumed to be in a state where the winding is slackened at the position of the restriction pin 40 after being restricted by the restriction pin 40. To the outer peripheral surface A of the bobbin 15 through the first groove portion 170 in the direction W2.

  Next, the regulating pin 40 is pulled out from the central portion 15a to the outside through the penetrating portion 172 in the direction of arrow B. Next, the first exciting coil 10 is formed by winding in the direction W2 so as to satisfy a predetermined number of windings. Next, after the winding of the first exciting coil 10 is finished, the restriction pin 40 is inserted again between the second coil terminal 161 and the third coil terminal 162 from the lower side through the penetrating portion 172 in the drawing. Next, the winding is in a state where the winding is restricted by the restriction pin 40, that is, a state where the winding is slackened at the position of the restriction pin 40, and the winding intermediate portion W <b> 3 is connected to the connection portion 164 of the second coil terminal 161. Then tie them in the counterclockwise direction at least once.

  Next, after the winding intermediate portion W3 is connected to the second coil terminal 161, the state where the winding is slackened at the position of the restriction pin 40, that is, the state where the winding is slackened at the position of the restriction pin 40, Winding is performed a plurality of times in the direction W4 on the outer peripheral surface A of the bobbin 15 through the second groove portion 171 from the central portion 15a. Next, the regulating pin 40 is pulled out from the central portion 15a to the outside through the penetrating portion 172 in the direction of arrow B. Next, the second exciting coil 11 is formed by winding in the direction W4 so as to satisfy a predetermined number of windings. Next, the restriction pin 40 is inserted between the second coil terminal 161 and the third coil terminal 162 from the lower side in the drawing through the through portion 172.

  Next, the state where the winding is slackened at the position of the regulation pin 40, that is, the state where the winding is slackened at the position of the regulation pin 40, the other end W5 of the winding is watched against the connection part 163 of the third coil terminal 162. Connect at least once in the direction. Next, the restricting pin 40 is pulled out from the central portion 15a to the outside through the penetrating portion 172 in the direction of the arrow B, so that the exciting coils 10 and 11 are created.

In addition, about the method of connection and the method of winding of each exciting coil 10 and 11, it is possible to implement in various combinations irrespective of the order and direction shown above, and there exists the same effect. be able to. For example, starting with connection to the third coil terminal 162, winding of the second excitation coil 11, connection to the second coil terminal 161, winding of the first excitation coil 10, and connection to the first coil terminal 160. Also good.
Further, the slack of the winding by the regulation pin 40 is formed on either the upper surface side or the lower surface side of the regulation pin 40, and any of them can be configured similarly.

  According to the electromagnetic actuator, the manufacturing method of the electromagnetic actuator, and the electromagnetic relay of the first embodiment configured as described above, the coil terminals are located at different positions in the second direction and the axial direction in the central portion of the bobbin. Therefore, the interval between the coil terminals can be widened, and the connection work to each coil terminal can be easily performed. Furthermore, since each coil terminal is formed to protrude in the first direction of the bobbin, automatic winding work can be easily performed.

Further, since the windings can be respectively introduced into the first excitation coil, the central portion of the bobbin, and the second excitation coil through the respective groove portions, the winding can be reliably and easily performed.
In addition, by using the interval between the coil terminals and the through portion, the regulation pin can be inserted into the central portion of the bobbin so that the winding can be slackened. Reliability is improved.
Thereby, an inexpensive and highly reliable electromagnetic relay can be obtained.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

1 case, 2 first connection terminal, 3 fixed contact, 4 second connection terminal, 5 movable contact,
6 crossbar, 7 contact spring, 8 rod, 9 plunger, 10 first excitation coil, 10a outer diameter, 11 second excitation coil, 11a outer diameter, 12 permanent magnet,
13 Magnetic plate, 14 Yoke, 15 Bobbin, 15a Center part,
150 1st installation part, 151 2nd installation part, 152 3rd installation part, 150a 1st end surface, 152a 3rd end surface, 160 1st coil terminal, 161 2nd coil terminal,
162 third coil terminal, 163 connection part, 164 connection part, 170 first groove part,
171 2nd groove part, 172 penetration part, 180 1st flange part,
181 Second flange, 30 electromagnetic actuator, 40 regulating pin,
W1 winding one end, W3 winding middle, W5 winding other end, A outer peripheral surface, X-axis direction,
Z first direction, Y second direction.

Claims (6)

With bobbin,
A second direction perpendicular to the axial direction and the first direction of the bobbin, and the axial direction projecting in a first direction perpendicular to the axial direction at a central portion of the outer peripheral surface of the bobbin A first coil terminal, a second coil terminal, a third coil terminal formed at different positions in
One end of the winding, one end of the winding and the other end of the winding are connected to any one of the coil terminals, respectively, and the outer peripheral surfaces on both sides of the bobbin across the coil terminals, respectively. A wound first exciting coil and a second exciting coil;
A plunger built in the bobbin;
A yoke formed to be fixed to the bobbin so as to sandwich the first excitation coil and the second excitation coil at positions different from the coil terminals;
An electromagnetic actuator comprising a permanent magnet and a magnetic plate disposed between the yoke and the bobbin. A first end surface and a third surface formed at positions in the second direction of the outer diameters of the first excitation coil and the second excitation coil at positions symmetrical with respect to the axis of the bobbin in the central portion of the bobbin. A first installation part and a third installation part having end faces are respectively formed,
In the central part of the bobbin, the second installation part formed between the second direction of the first installation part and the third installation part and formed on the first excitation coil side,
The first coil terminal is installed on the second excitation coil side on the first installation part,
The second coil terminal is installed on the second installation part,
The third coil terminal is installed on the second exciting coil side on the third installation part,
Between the first installation part and the second installation part, a first groove part reaching the first excitation coil side of the outer peripheral surface of the bobbin is formed,
Between the first installation part and the third installation part, a second groove part that reaches the second excitation coil side of the outer peripheral surface of the bobbin is formed,
The winding has one end of the winding connected to the first coil terminal, wound around the bobbin via the first groove, to form the first exciting coil, and the winding middle is the first winding The wire is connected to a two-coil terminal, wound around the bobbin via the second groove portion to form the second exciting coil, and the other end of the winding is connected to the third coil terminal. The electromagnetic actuator described. 3. The electromagnetic actuator according to claim 2, wherein the third end surface of the third installation portion includes a penetration portion that penetrates the outside in the second direction. In the manufacturing method of the electromagnetic actuator of Claim 2 or Claim 3,
Connecting one end of the winding to the first coil terminal;
Winding the winding from the central portion to the outer peripheral surface of the bobbin via the first groove portion to form the first excitation coil,
Connecting the winding middle part to the second coil terminal,
Winding the winding around the outer peripheral surface of the bobbin from the central portion through the second groove portion to form the second exciting coil;
A method of manufacturing an electromagnetic actuator in which the other end of the winding is connected to the third coil terminal. In the manufacturing method of the electromagnetic actuator of Claim 3,
Connecting one end of the winding to the first coil terminal;
Inserting a regulation pin from the penetrating part in the second direction of the central part,
After the winding is slackened by the restriction pin, the winding is wound around the outer peripheral surface of the bobbin through the first groove portion a plurality of times, the restriction pin is pulled out, and wound to the final turn. Forming one excitation coil,
Inserting the regulation pin from the penetrating part in the second direction of the central part,
After inserting the winding in the central portion and slackening the winding with the restriction pin, connecting the winding intermediate portion to the second coil terminal,
After the winding is slackened with the restriction pin, the winding is wound around the outer peripheral surface of the bobbin from the central portion through the second groove portion, and the restriction pin is pulled out and wound until the final turn. And forming the second exciting coil,
Inserting the regulation pin from the penetrating part in the second direction of the central part,
After slackening the winding with the restriction pin, the other end of the winding is connected to the third coil terminal,
A method of manufacturing an electromagnetic actuator for pulling out the restriction pin. A case in which the electromagnetic actuator according to any one of claims 1 to 3 is internally provided and formed of a resin;
The electromagnetic relay provided with the fixed contact formed by fixing to the said case, and the movable contact which interrupts between the said fixed contacts according to the motion of the said plunger.

Images