JP6327992B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay.

  2. Description of the Related Art Conventionally, an electromagnetic relay that opens and closes a contact in response to an electric signal input has been widely used. In general, the electromagnetic relay includes a fixed contact portion, a movable contact portion that contacts the fixed contact portion, and an electromagnet device for operating the movable contact portion. The electromagnet device further includes an armature that rotates with the end of the yoke as a fulcrum. The armature is attached by being biased in a predetermined direction by, for example, a hinge spring or the like (see Patent Document 1). ).

JP 2010-123545 A

  However, as disclosed in Patent Document 1, when the hinge spring is arranged between the yoke and the movable contact portion, the operator attaches the hinge spring while avoiding interference with the armature during assembly of the electromagnetic relay. There is a problem that assembly work is not easy.

  The present invention has been made in view of the above problems, and an object thereof is to provide an electromagnetic relay that can be easily assembled.

The electromagnetic relay according to the embodiment of the present invention has the following configuration. That is,
A fixed contact portion including a fixed contact;
A movable contact portion including a movable contact contacting the fixed contact;
An electromagnetic relay having an electromagnet device that brings the movable contact into contact with the fixed contact by operating the movable contact portion;
The electromagnet device is
An armature that attracts the iron core surface of the electromagnet device and operates the movable contact portion by rotating with respect to a fulcrum;
A hinge spring that presses a part of the armature opposite to the iron core surface across a fulcrum when the armature rotates so that the armature moves away from the iron core surface;
A fixing member that fixes an end of the hinge spring with the outside of the side surface of the armature as a fixing position;
The fixing member is
When the hinge spring is attached, the hinge spring is moved from the upper side to the lower side of the armature so that the end of the hinge spring can be fixed.

  According to each embodiment of the present invention, it is possible to provide an electromagnetic relay that can be easily assembled.

It is a figure which shows the whole structure of an electromagnetic relay. It is a figure which shows the structure of a hinge spring. It is a figure for demonstrating the urging position with respect to the armature of a hinge spring, the urging | biasing direction, and the fixed position in an electromagnet apparatus. It is a side view of an electromagnetic relay. It is a figure for demonstrating the advantage at the time of using the hinge spring which concerns on this embodiment. It is a figure for demonstrating the detail of the attachment method of a hinge spring. It is a figure for demonstrating the detailed shape of a hinge spring. It is a figure which shows a mode that the fixing | fixed part of the hinge spring was fitted to the fitting part.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, the duplicate description is abbreviate | omitted by attaching | subjecting the same code | symbol.

[First Embodiment]
<1. Overall configuration of electromagnetic relay>
First, the overall configuration of the electromagnetic relay according to the present embodiment will be described. FIG. 1 is a diagram illustrating the overall configuration of the electromagnetic relay with the outer cover removed.

  As shown in FIG. 1, the electromagnetic relay 100 includes a fixed contact portion 110, a movable contact portion 120, and an electromagnet device 130. The fixed contact portion 110, the movable contact portion 120, the electromagnet device 130, and the like. Are fixed by a base mold 140 and a bottom plate 150. In addition, terminals 160 and 170 protrude below the bottom plate 150.

  The fixed contact portion 110 includes two fixed contact springs 111 and two fixed contacts 112, and the two fixed contact springs 111 are connected to one of the two terminals 160, respectively. Similarly, the movable contact portion 120 also has two movable contact springs and two movable contacts, which are arranged to face the two fixed contact springs 111 and the two fixed contacts 112, respectively. The two movable contact springs are connected to the armature 131 via the holding member 137.

  The electromagnet device 130 includes an armature 131, an iron core 132, a winding 133, a yoke 134, a hinge spring 135, an arc extinguishing yoke 136, and a holding member 137.

  The armature 131 is configured to rotate about the upper end of the yoke 134 as a fulcrum. When the armature 131 rotates about the upper end of the yoke 134 as a fulcrum, the movable contact portion 120 connected to the armature 131 via the holding member 137 is movable to a contact position where the movable contact and the fixed contact come into contact with each other. It reciprocates between a non-contact position where the contact and the fixed contact are non-contact.

  Further, the armature 131 is attracted and separated from the end face (iron core surface) of the iron core 132. Specifically, when an electromagnetic force is generated by applying a voltage to the terminal 170 connected to the winding 133, the armature 131 is attracted to the iron core surface. As a result, the movable contact portion 120 moves to the contact position. When the movable contact portion 120 moves to the contact position, one terminal 160 is electrically connected to the other terminal 160 via the one fixed contact and the movable contact and the other movable contact and the fixed contact.

  The hinge spring 135 biases the armature 131 in a direction in which the armature 131 is separated from the iron core surface. The hinge spring 135 constantly urges the armature 131 in the direction in which the armature 131 is separated from the iron core surface. Therefore, when the application of voltage to the terminal 170 is stopped, the armature 131 is urged by the urging force of the hinge spring. Moves away from the iron core surface, and the movable contact portion 120 moves to the non-contact position. Then, until the voltage is next applied to the terminal 170, the non-contact position of the movable contact portion 120 is maintained. The detailed configuration of the hinge spring 135 will be described later.

  The arc extinguishing yoke 136 is disposed on both sides of the contact position between the movable contact and the fixed contact. The arc extinguishing yoke 136 is a permanent magnet (non-magnetic) arranged to extinguish an arc generated between the fixed contact and the movable contact when the movable contact 120 moves from the contact position to the non-contact position. It plays the role of strengthening the magnetic force shown in the figure.

<2. Structure of hinge spring>
Next, the configuration of the hinge spring 135 will be described. FIG. 2 is a diagram illustrating a configuration of the hinge spring 135. As shown in FIGS. 2A and 2B, the hinge spring 135 has a fixing portion 210 fixed to the electromagnet device 130 and a biasing portion 220 that provides a force for biasing the armature 131. In the examples of FIGS. 2A and 2B, x, y, and z axes are defined for convenience in describing the shape of the hinge spring 135.

  As shown in FIG. 2A, the fixing portion 210 has members 211 and 212 extending in the z-axis direction.

  2B, the urging portion 220 includes a member 221 extending in the z-axis direction from the member 211 and a member 222 extending from the member 212 in the z-axis direction. Further, the urging portion 220 includes a member 223 extending in the x-axis direction formed by bending an end of the member 221 opposite to the side to which the member 211 is connected, and a side to which the member 212 of the member 222 is connected. And a member 224 formed by bending the opposite end and extending in the x-axis direction.

  Further, one of the urging portions 220 is connected to the end of the member 223 opposite to the side where the member 221 is connected, and the other is connected to the end of the member 224 opposite to the side where the member 222 is connected. And a member 225 extending in the y-axis direction.

  The biasing portion 220 is formed to be symmetrical with respect to the center position in the y-axis direction when viewed from the x-axis direction and when viewed from the z-axis direction.

  The members 223 and 224 of the urging unit 220 include a first contact region 231 and a second contact region 232, and the member 225 includes a third contact region 233. The urging unit 220 is in contact with a part of the armature 131 in the first contact region 231, the second contact region 232, and the third contact region 233, thereby moving the armature 131 away from the iron core surface. Energize to.

  Thus, according to the shape of the hinge spring 135 of the present embodiment, the biasing portion 220 contacts the armature 131 in a plurality of regions and biases the armature 131. The shape of the hinge spring 135 is not limited to that shown in FIG. 2, and the armature 131 may be urged in at least one contact region. That is, you may comprise by the shape which has only any one contact area of the 1st contact area 231, the 2nd contact area 232, or the 3rd contact area 233.

  Further, the hinge spring does not need to be configured as one part. For example, you may provide two independent hinge springs, the hinge spring which has the member 211 and the members 221 and 223, and the hinge spring which has the member 212 and the members 222 and 224 of the biasing part 220.

<3. Explanation of hinge spring fixing position, biasing position, and biasing direction>
Next, the fixing position of the hinge spring 135 in the electromagnet device 130, the biasing position and the biasing direction of the hinge spring 135 with respect to the armature 131 will be described.

  FIG. 3 is a view for explaining a fixing position, an urging position, and an urging direction of the hinge spring 135. In the example of FIG. 3A, the fixed contact portion 110, the movable contact portion 120, the base mold 140, the bottom plate 150, the terminal 160, and the like are provided in order to facilitate explanation of the fixed position, the biasing position, and the biasing direction. Is omitted. Further, in the example of FIG. 3B, the hinge spring 135 is further omitted.

As shown in FIG. 3A, the member 211 of the fixing portion 210 of the hinge spring 135 is
In the y-axis direction, outside the side surface of the armature 131, and
-In the x-axis direction, the iron core surface side of the fulcrum (upper end portion of the yoke 134) when the armature 131 rotates,
It fixes to the fitting part not shown in FIG. In the example of FIG. 3, only one member 211 of the fixing portion 210 of the hinge spring 135 is illustrated, but the other member 212 is similarly illustrated.
In the y-axis direction, outside the side surface of the armature 131, and
-In the x-axis direction, the iron core surface side of the fulcrum (upper end portion of the yoke 134) when the armature 131 rotates,
It fixes to the fitting part not shown arrange | positioned.

  The first contact region 231, the second contact region 232, and the third contact region 233 of the urging portion 220 of the hinge spring 135 are armatures located on the opposite side of the iron core surface with the fulcrum in the x-axis direction. The portions 311 to 313 (see FIG. 3B) are in contact with each other. Accordingly, the urging unit 220 urges the armature parts 311 to 313 in the direction of the arrow 301. As a result, in a state where no electromagnetic force is generated, the armature 131 is separated from the iron core surface, and the movable contact and the fixed contact are not in contact with each other.

  FIG. 4 shows a fitting portion to which the member 211 of the fixing portion 210 of the hinge spring 135 is fixed. FIG. 4 is a side view of the electromagnetic relay with the outer cover removed. As shown in FIG. 4, the member 211 of the fixing portion 210 of the hinge spring 135 is fixed in the gap between the yoke 134 and the base mold 140. The gap between the yoke 134 and the base mold 140 acts as the fitting part 400. Similarly, the member 212 of the fixing portion 210 of the hinge spring 135 is also fixed to the gap (not shown in FIG. 4) between the yoke 134 and the base mold 140.

<4. Advantages of hinge spring>
Next, advantages of using the hinge spring 135 according to the present embodiment will be described. FIG. 5 is a diagram for explaining the advantages when the hinge spring 135 according to the present embodiment is used. In FIG. 5, a side view of the hinge spring 135 and a plan view and a side view of the armature 131 are shown in FIG. 5A in order to explain the advantages of using the hinge spring 135. . On the other hand, FIG. 5B shows a side view of the hinge spring and a plan view and a side view of the armature 131 when the hinge spring of the comparative example is used to bias the armature 131. Yes.

  As shown in FIG. 5A, in the case of the present embodiment, the member 211 of the hinge spring 135 is fixed to the fitting portion 400 disposed at the fixing position 401 outside the side surface of the armature 131 in the y-axis direction. The Similarly, the member 212 is fixed to a fitting portion disposed at a fixed position 401 ′ outside the side surface of the armature 131 in the y-axis direction. For this reason, when the hinge spring 135 is attached to the electromagnet device 130, the fixing portion 210 does not interfere with the armature 131.

  On the other hand, in the case of the hinge spring 435 shown in FIG. 5B, the fixing portion 410 is fixed to the fitting portion 440 arranged at the fixing position 411 inside the armature 131 in the y-axis direction. The fitting portion 440 is a member that fixes the fixing portion 410 of the hinge spring 435, and is disposed inside the armature 131 in the y-axis direction. For this reason, when the hinge spring 435 is attached to the electromagnet device, the fixing portion 410 may interfere with the armature 131, and it is necessary to attach the hinge spring 435 while avoiding interference with the armature 131. .

  That is, in the hinge spring 135 according to the present embodiment, the hinge spring 135 is attached to the electromagnet device 130 by changing the fixing position with respect to the hinge spring 435 in FIG. 5B (411 → 401, 401 ′). Making it easy. As a result, it is possible to provide an electromagnetic relay that can be easily assembled.

  Further, as shown in FIG. 5A, in the case of the hinge spring 135 according to the present embodiment, the member 211 of the fixing portion 210 is fitted at the fixing position 401 that is closer to the iron core surface than the fulcrum in the x-axis direction. It is fixed to the part 400. Further, the member 212 of the fixing portion 210 is fixed to a fitting portion (not shown) at a fixing position 401 ′ that is closer to the iron core surface than the fulcrum in the x-axis direction. For this reason, the spring length of the hinge spring 135 can be lengthened.

  On the other hand, in the case of the hinge spring 435 shown in FIG. 5B, the fixing portion 410 is fixed to the fitting portion 440 at the fixing position 411 on the opposite side of the iron core surface across the fulcrum in the x-axis direction. (Fixed between the yoke 134 and the movable contact portion). For this reason, the spring length of the hinge spring 435 cannot be increased.

  That is, in the hinge spring 135 according to this embodiment, the spring length of the hinge spring 135 is increased by changing the fixing position with respect to the hinge spring 435 in FIG. 5B (411 → 401, 401 ′). . When the spring length of the hinge spring 135 is increased, the allowable range of manufacturing errors when the hinge spring 135 is manufactured can be widened.

<5. Attaching the hinge spring>
Next, the detail of the attachment method of the hinge spring 135 is demonstrated. FIG. 6 is a diagram for explaining the details of the method of attaching the hinge spring 135.

  As shown in FIG. 6A, when the hinge spring 135 according to the present embodiment is attached to the electromagnet device 130, the armature 131 is attached to the yoke 134 from above the armature 131 downward ( Move in the z-axis direction (minus side). Here, as shown in FIG. 4, the fitting portion 400 is formed so as to fit the members 211 and 212 of the fixing portion 210 of the hinge spring 135 in the z-axis direction. For this reason, in the assembly work of the electromagnetic relay 100, the worker moves the hinge spring 135 from the upper side of the armature 131 downward to the lower side, so that the members 211 and 212 of the fixing part 210 of the hinge spring 135 are used as the fitting parts. Can be fixed.

  As described above, since the fitting portion 400 and the like are provided outside the side surface of the armature 131 in the y-axis direction, the operator moves the hinge spring 135 from the upper side to the lower side of the armature 131. Further, the fixed portion 210 of the hinge spring 135 and the armature 131 do not interfere with each other.

FIG. 6B is a plan view of the state in which the hinge spring 135 is attached as viewed from above. As shown in FIG. 6B, among the biasing portion 220 of the hinge spring 135, the members 223 to 225 extending in the x-axis direction and the y-axis direction have shapes that satisfy the following conditions.
The first to third contact regions 231 to 233 are in contact with the parts 311 to 313 of the armature 131 with the hinge spring 135 attached.
A region other than the first to third contact regions 231 to 233 does not come into contact with the armature 131 when and after the hinge spring 135 is attached.

  That is, when the hinge spring 135 is moved in the z-axis direction (minus side), the urging portion 220 and the armature 131 of the hinge spring 135 are in areas other than the first to third contact areas 231 to 233. The planar shape of the urging portion 220 is formed so as not to interfere.

  In other words, among the members 223 to 225 extending in the x-axis direction and the y-axis direction in the urging portion 220, the regions other than the first to third contact regions 231 to 233 are the planar outer shape (upward) of the armature 131. It has a planar shape along the outer shape when viewed from the side.

  For this reason, the fixing | fixed part 210 of the hinge spring 135 can be easily fitted to the fitting part 400 grade | etc.,. That is, attachment of the hinge spring 135 to the electromagnet device 130 is facilitated.

<6. Detailed shape of hinge spring>
Next, the detailed shape of the hinge spring will be described. FIG. 7 is a view for explaining the detailed shape of the hinge spring 135.

  7A shows a front view when the hinge spring 135 is viewed from the front, and FIG. 7B shows a side view when the hinge spring 135 is viewed from the side.

  As shown in FIG. 7A, the widths of the members 211 and 212 of the fixed portion 210 are formed wider than the widths of the members 221 and 222 of the biasing portion 220. A shoulder 601 is formed on the top. For this reason, in the assembly work of the electromagnetic relay 100, the operator can press the shoulder portions 601 and 602 in the z-axis direction when fitting the fixing portion 210 of the hinge spring 135 to the fitting portion 400 or the like. Become. That is, when fitting the fixing portion 210 of the hinge spring 135 to the fitting portion 400 or the like, the operator does not need to press the members 223 to 225 and the like of the biasing portion 220 in the z-axis direction. For this reason, the problem that the urging portion 220 is deformed when the hinge spring 135 is attached does not occur, and the operator can easily attach the hinge spring 135.

  In addition, as shown in FIG.7 (b), the direction (z-axis direction (minus side)) opposite to the fitting direction at the time of fitting to the fitting part 400 grade | etc., On the members 211 and 212 of the fixing | fixed part 210 ( Cut-and-raised portions 611 and 612 for restricting movement in the z-axis direction (plus side) are provided. Among these, the cut-and-raised part 612 is cut and raised in the x-axis direction (plus side). In the cut-and-raised portion 612, a force in the opposite direction (z-axis direction (plus side)) to the fitting portion 400 and the like (z-axis direction (plus side)) is applied to the fixing portion 210. In this case, it plays the role of hooking its tip to the fitting portion 400 or the like. Thereby, in the cut-and-raised part 612, the fixing part 210 of the hinge spring 135 can be prevented from coming off from the fitting part 400 or the like.

  FIG. 8 is a diagram illustrating a state in which the fixing portion 210 of the hinge spring 135 is fitted to the fitting portion 400. As shown in FIG. 8, the tip of the cut-and-raised part 612 is caught by the lower end of a protrusion 134 a (see FIG. 3B) formed on the yoke 134. Therefore, even when a force in the direction (z-axis direction (plus side)) opposite to the fitting direction (z-axis direction (minus side)) of the hinge spring 135 is applied to the fixing portion 210, the fixing portion of the hinge spring 135 is fixed. 210 does not come out of the fitting part 400.

  On the other hand, the cut-and-raised part 611 is cut and raised in the x-axis direction (minus side). The cut-and-raised part 611 receives force from the fitting part 400 and the like in order to press the fitting part 400 and the like in the x-axis direction (minus side). That is, since the biasing portion 220 of the hinge spring 135 is biased in the x-axis direction (plus side), the hinge spring 135 biases the armature 131 as compared with the case where the cut-and-raised portion 611 is not provided. The power of can be strengthened.

  As shown in FIG. 8, the cut-and-raised portion 611 contacts the slope 800 of the base mold 140. Since the cut-and-raised part 611 has a spring property, the cut-and-raised part 611 in contact with the inclined surface 800 urges the urging part 220 of the hinge spring 135 in the x-axis direction (plus side).

<7. Summary>
As is clear from the above description, in the electromagnetic relay according to this embodiment,
The hinge spring is formed so that the fixing portion of the hinge spring is fixed to the outer side of the side surface of the armature and closer to the iron core surface than the fulcrum when the armature rotates.
-The fitting direction of the fitting portion was made to coincide with the moving direction of the hinge spring when the hinge spring was attached so that the hinge spring was attached to the electromagnet device by moving the hinge spring from above to below the armature.
-When mounting the hinge spring, the planar shape of the biasing portion of the hinge spring is made to conform to the planar shape of the armature so that the biasing portion of the hinge spring does not interfere with the armature.

  Thereby, attachment to the electromagnet apparatus of a hinge spring becomes easy, and it becomes possible to improve the assembly property of an electromagnetic relay.

  Furthermore, the spring length of the hinge spring can be made longer, and the allowable range of manufacturing errors of the hinge spring can be expanded.

[Second Embodiment]
In the first embodiment, the fitting depth when the fixing portion 210 of the hinge spring 135 is fitted to the fitting portion 400 is constant, but the present invention is not limited to this, and the fitting depth is not limited thereto. It is good also as a structure which can be changed arbitrarily. This is because the biasing force when the hinge spring 135 biases the armature 131 can be finely adjusted by changing the fitting depth.

  In addition, the fitting depth in the case of making it fit in the fitting part 400 is the fitting part 400 grade | etc., For example, with the metal piece which has the same thickness and width as the member 211 or 212 of the fixing | fixed part 210 of the hinge spring 135. It can be adjusted by inserting it into In particular, if there are a plurality of metal pieces having different heights, the fitting depth can be finely adjusted.

  The present invention is not limited to the configuration shown here, such as a combination with other components in the configuration described in the above embodiment. These points can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

DESCRIPTION OF SYMBOLS 100: Electromagnetic relay 110: Fixed contact part 111: Fixed contact spring 112: Fixed contact 120: Movable contact part 121: Movable contact spring 122: Movable contact 130: Electromagnet device 131: Armature 132: Iron core 133: Winding 134: Relay Iron 135: Hinge spring 136: Arc extinguishing yoke 137: Holding member 140: Base mold 150: Base plate 160: Terminal 170: Terminal 210: Fixing portion 220: Energizing portion 231: First contact area 232: Second contact Region 234: Third contact region 400: Fitting portion 401: Fixed position 401 ′: Fixed position 601: Shoulder portion 602: Shoulder portion 611: Cut and raised portion 612: Cut and raised portion

Claims (6)

A fixed contact portion including a fixed contact;
A movable contact portion including a movable contact contacting the fixed contact;
An electromagnetic relay having an electromagnet device that brings the movable contact into contact with the fixed contact by operating the movable contact portion;
The electromagnet device is
An armature that attracts the iron core surface of the electromagnet device and operates the movable contact portion by rotating with respect to a fulcrum;
A hinge spring that presses a part of the armature opposite to the iron core surface across a fulcrum when the armature rotates so that the armature moves away from the iron core surface;
A fixing member that fixes an end of the hinge spring with the outside of the side surface of the armature as a fixing position;
The fixing member is
An electromagnetic relay characterized in that, when the hinge spring is attached, the end of the hinge spring can be fixed by moving the hinge spring downward from above the armature.   The electromagnetic relay according to claim 1, wherein the fixing member fixes an end portion of the hinge spring with the iron core surface side of the fulcrum as a fixing position. The fixing member is
When the hinge spring is attached, the moving direction when the hinge spring is moved from the upper side to the lower side of the armature coincides with the fitting direction when the end portion of the hinge spring is fitted. The electromagnetic relay according to claim 2, wherein the electromagnetic relay is configured.   The electromagnetic relay according to claim 3, wherein the hinge spring is formed in conformity with a planar outer shape of the armature.   The electromagnetic relay according to claim 4, wherein a cut-and-raised portion that restricts movement in a direction opposite to the fitting direction is provided at an end of the hinge spring.   The hinge spring includes a first hinge spring having an end portion fixed outside the one side surface of the armature, and a second hinge spring having an end portion fixed outside the other side surface of the armature. The electromagnetic relay according to claim 1, comprising: