JP2007294425A - Electromagnetic relay, and electromagnetic relay unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further efficiently suppress a temperature rise of a coil in an electromagnetic relay performing opening and closing of a contact by electromagnetic force. <P>SOLUTION: The electromagnetic relay comprises a fixed terminal board 5 having fixed contacts 5e and 5f, a movable terminal board 4 having a movable contact 4a, an electromagnet 2 switching a first current path for bringing the movable contact 4a into contact with the fixed contact 5e and a second current path for bringing the movable contact into contact with the fixed contact 5f, a core 2b inserted through the electromagnet 2, a bottom plate 1b fixing them, and a radiation plate 7 having a radiating terminal 7a protruding out of the bottom plate 1b without contact with the fixed terminal board 5 and the movable terminal board 4 while being partially connected with the core 2b, the radiation plate being interposed and fixed between the bottom plate 1b and the core 2b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electromagnetic relay that opens and closes contacts by electromagnetic force.

  Conventionally, as shown in the longitudinal sectional front view of FIG. 13 and the CC cross-sectional view of FIG. 14, the movable contact 104a is moved up and down by the electromagnetic force of the electromagnet 102 in which the coil 102a is wound around the core 102b. An electromagnetic relay 100 that switches between contact with either the contact 104b or the fixed contact 104c is used.

  Both ends of the lead wire of the coil 102a of the electromagnetic relay 100 are connected to the connected coil terminal 106. More specifically, the coil terminal 106 is disposed through the bottom plate 102 at a symmetrical position in the front-rear direction across the electromagnet 102 of the bottom plate 107, and the terminal portion 106 a projects to the bottom surface side of the bottom plate 107. The both ends of the lead wire of the coil 102a are wound and connected to the connection convex piece 106b protruding from the upper end.

  The electromagnetic relay 100 mainly generates heat at the coil 102a and the contacts 104 (104a, 104b, 104c). The heat generated at the contact 104 is dissipated from the contact terminal 105 connected to the contact 104.

However, when the electromagnetic relay 100 main body is downsized, the heat from the contact terminal 105 cannot be sufficiently radiated, and the heat generated at the contact 104 is accumulated in the core 102b to raise the temperature of the coil 102a.
Moreover, the problem that the minimum operating voltage of an electromagnetic relay rises with the temperature rise inside the electromagnetic relay 100 main body also arises.

Then, the electromagnetic relay provided with the heat radiating member which thermally radiates the heat generated with the coil is proposed (refer to patent documents 1).
This electromagnetic relay is configured to radiate heat generated in the coil to an external low-temperature heat source through the heat radiating member. However, since the heat dissipation member is provided in the wiring, the heat dissipation path by the heat dissipation member restricts the current path that leads to the contact terminal, increasing the heat generation from the contact terminal and the current path, resulting in the coil The temperature increased.

JP 2004-134140 A

  An object of the present invention is to efficiently suppress an increase in the temperature of a coil in an electromagnetic relay that opens and closes contacts by electromagnetic force.

  The present invention includes a fixed contact terminal, a movable contact terminal, an electromagnetic coil that moves the movable contact terminal and switches a contact state with the fixed contact terminal, the core, the fixed contact terminal, the movable contact terminal, An electromagnetic coil, a fixed plate for fixing the core, a protruding portion protrudes outside the fixed plate without contacting the fixed contact terminal and the movable contact terminal, and the fixed plate and the core It is an electromagnetic relay provided with a heat radiating member interposed and fixed therebetween.

In the switching, the movable contact terminal that is in contact with one of the two fixed contact terminals is brought into contact with the other fixed contact terminal, or the movable contact terminal that is in contact with the fixed contact terminal is separated. Including.
The outside of the fixed plate includes the fixed contact terminal, the movable contact terminal, and a side opposite to the fixed side of the fixed plate that fixes the electromagnetic coil.

  Thereby, the heat generated in the electromagnetic coil or the heat of the core in which the heat generated by the contact between the movable contact terminal and the fixed contact terminal is accumulated can be radiated to the outside of the fixed plate by the heat radiating unit. it can. Therefore, the temperature rise of the electromagnetic coil can be suppressed and deterioration of the electromagnetic coil can be suppressed.

  Further, since the fixed contact terminal, the movable contact terminal, and the protruding portion of the heat dissipation member do not contact each other, the influence of the heat that the fixed contact terminal, the movable contact terminal, and the lead terminal receive from the heat dissipation member is reduced. be able to. Therefore, an increase in the minimum operating voltage of the electromagnetic relay due to the temperature increase can be suppressed.

As an aspect of the present invention, the fixing plate can be formed of a low thermal conductive material having lower thermal conductivity than the heat radiating member.
Thereby, it can reduce that the heat | fever of a heat radiating member is transmitted to the said stationary contact terminal, the said movable contact terminal, and the said electromagnetic coil via a stationary plate.

As an aspect of the present invention, a thermally conductive material can be interposed between the core and the heat dissipation member.
Thereby, the heat accumulated in the core can be efficiently transmitted to the heat dissipation member. Therefore, the heat dissipation effect of the core can be improved.

For example, when a heat conductive material with good adhesiveness is used, the adhesiveness between the core and the heat dissipation member can be improved, and a heat dissipation effect can be obtained more efficiently.
Further, for example, if the heat conductive material is made of an insulating material, a short circuit due to the heat radiating member can be prevented.

  As an aspect of the present invention, a lead terminal connected to the electromagnetic coil is provided, and the fixed contact terminal, the movable contact terminal, and a part of each lead terminal of the electromagnetic coil protrude from the fixed plate as terminal protrusions. The terminal protrusions can be disposed near the outer edge of the fixing plate, and the protrusions of the heat radiating member can be disposed on the inner side in plan view of the fixing plate and provided on the outer side of the fixing plate.

Thereby, the influence of the heat which a heat radiating member has with respect to the said fixed contact terminal, the said movable contact terminal, and the said lead terminal can further be reduced. Therefore, temperature rises of the fixed contact terminal, the movable contact terminal, and the coil can be suppressed.
Further, by disposing the projecting portion of the heat radiating member inside the fixed plate in a plan view, it is possible to prevent the heat radiating member from affecting the peripheral components of the electromagnetic relay installed on the same substrate.

As an aspect of the present invention, the protrusion of the heat radiating member can be disposed near the center of the fixed plate in plan view.
Thereby, the protrusion part of a thermal radiation member can be isolated with sufficient balance from any terminal of the said fixed contact terminal, the said movable contact terminal, and the said lead terminal. Therefore, the influence of heat on any of the fixed contact terminal, the movable contact terminal, and the lead terminal can be reduced in a balanced manner.

  In addition, as an aspect of the present invention, an input side heat radiation member including a lead terminal constituted by an input side lead terminal and an output side lead terminal energized with the electromagnetic coil, and the heat radiation member integrally formed with the input side lead terminal And an output side heat radiating member formed integrally with the output side lead terminal.

  As a result, the current path that forms part of the lead terminal and the electromagnetic coil can be used as a heat dissipation path for the heat generated by the electromagnetic coil, compared to the case where the lead terminal and the heat dissipation member are configured as separate parts. Thus, the number of types of parts can be reduced. Therefore, the cost of parts can be reduced, and the occurrence of assembly errors can be reduced as compared with the case where the parts are constituted by different parts.

As an aspect of the present invention, the heat radiating member can be formed of a plate made of steel, copper, or a copper alloy, and the lead terminal and the protruding portion of the heat radiating member can be formed from the plate by bending.
Thereby, the heat radiating member which has a protrusion part, and a lead terminal can be integrally formed by easy process. Therefore, the processing cost of the heat radiating member provided with the protrusion and the lead terminal can be reduced.
In addition, compared with the case where the protrusion formed by another member is connected to the heat dissipation member, the efficiency of transmission of heat transmitted from the electromagnetic coil to the heat dissipation member to the protrusion is improved, and a reliable heat dissipation effect is achieved. Obtainable.

Further, as an aspect of the present invention, the projecting portion is in the vicinity of the center in the plan view in the vicinity of the electromagnetic coil, and the lead terminal is outside in the plan view from the projecting portion.
The heat radiating member can be arranged.

Thereby, the transmission path | route for radiating the heat | fever which generate | occur | produced with the electromagnetic coil can be comprised short, and it can thermally radiate efficiently from the protrusion part of a heat radiating member. Therefore, it is possible to reduce the influence of the heat generated in the electromagnetic coil on the lead terminal.
Further, by disposing the projecting portion of the heat radiating member inside the fixed plate in a plan view, it is possible to prevent the heat radiating member from affecting the peripheral components of the electromagnetic relay installed on the same substrate.
Furthermore, the protrusion of the heat radiating member can be isolated in a balanced manner from the fixed contact terminal and the movable contact terminal. Therefore, the influence of heat on the fixed contact terminal and the movable contact terminal can be reduced in a balanced manner.

As an aspect of the present invention, the input side heat radiating member and the output side heat radiating member can be formed in the same shape.
Thereby, compared with the case where the said input side heat radiating member and the said output side heat radiating member are comprised with a different component, the kind number of components can further be reduced. Therefore, the cost of parts can be reduced, and the occurrence of assembly errors can be further reduced as compared with the case where the parts are configured with different parts.

Further, as an aspect of the present invention, the shape of the protruding portion of the input side heat radiating member can be different from the shape of the protruding portion of the output side heat radiating member.
The difference in shape includes that the shape itself is different, a similar shape having different surface areas, or that the shape and surface area are different.

  Thereby, the heat radiation effect in an input side heat radiating member and an output side heat radiating member can be varied. Therefore, for example, according to the connection status and installation environment of the electromagnetic relay, such as increasing the heat dissipation effect at the input side heat dissipation member and decreasing the heat dissipation effect at the output side heat dissipation member, the optimal heat dissipation effect can be obtained without waste. Can do.

As an aspect of the present invention, the heat radiating member can be constituted by a heat sink.
The heat sink includes a copper member having high heat conductivity and a member having high heat dissipation performance formed by a steel member obtained by copper plating the surface of another steel member.

  Thereby, the heat accumulated in the core can be efficiently radiated more efficiently by the heat sink partly connected to the core directly or via a heat conductive material.

  Moreover, this invention is equipped with the electromagnetic relay of the said structure, and the board | substrate which installs this electromagnetic relay, The said board | substrate, the thermal radiation layer formed with the metal, a wiring pattern layer, the said thermal radiation layer, and the said wiring pattern layer, The terminal protrusions can be connected to the wiring pattern layer, and the protrusions of the heat dissipation member can be connected to the heat dissipation layer.

Thereby, the heat accumulated in the core can be dissipated through the heat dissipation layer. Therefore, temperature rises of the fixed contact terminal, the movable contact terminal, and the coil can be suppressed.
In addition, since the heat generated at each terminal is radiated into the air from each terminal protrusion through the wiring provided in advance in the wiring pattern layer, the heat radiation effect of the entire electromagnetic relay can be further improved.

  According to the present invention, it is possible to obtain an electromagnetic relay that opens and closes contacts by electromagnetic force and efficiently suppresses the temperature rise of the coil.

  An embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 showing a longitudinal front view of the electromagnetic relay 1, FIG. 2 showing an AA arrow sectional view of the electromagnetic relay 1, FIG. 3 showing a BB arrow sectional view of the electromagnetic relay 1 installed on the substrate 10, The electromagnetic relay 1 will be described together with FIG. 4 showing an explanatory diagram for switching the movable contact 4a of the electromagnetic relay 1. FIG.

  As shown in FIG. 1, the electromagnetic relay 1 is installed in a hollow case 1a having a substantially rectangular shape whose bottom is opened, a bottom plate 1b attached to a bottom opening portion of the case 1a, and inside the case 1a and on the top surface of the bottom plate 1b. The electromagnet 2, the movable terminal plate 4, and the fixed terminal plate 5 are configured.

  The case 1a and the bottom plate 1b are formed of a resin material having an appropriate thickness, and the outer peripheral portion of the bottom plate 1b is fitted and fixed near the lower end of the case 1a. The bottom plate 1b is made of PBT (polybutylene terephthalate) which is a low thermal conductive resin.

  As shown in FIG. 2, the electromagnet 2 includes a coil 2a formed by spirally winding a lead wire around a lateral outer peripheral surface of a coil bobbin 2c formed of a resin material in a cylindrical shape, and a central portion of the coil bobbin 2c. The core 2b is fixed to the core 2b. The coil 2a is connected to the coil terminal 6 by winding both end portions of the lead wire around the connecting convex piece 6b.

The movable terminal plate 4 is a steel side plate-shaped plate material having an appropriate width and thickness, and has a movable contact terminal 4b at the lower end and a movable contact 4a at the other end. ing.
The movable terminal plate 4 is provided at a central position in the front-rear direction (vertical direction in FIG. 2) near the left end of the bottom plate 1b. The movable terminal plate 4 is formed of a spring member having appropriate elastic force and conductivity.

  The fixed terminal plate 5 includes a first fixed plate 5a and a second fixed plate 5b that are arranged in the front-rear direction near the right end of the bottom plate 1b. Each is formed of a conductive member having conductivity and is formed into a reverse L-shaped plate shape having different heights. The fixed plate terminals 5c and 5d are formed at the lower ends, and the fixed contacts 5e and 5f are formed at the upper ends. Is provided.

  The fixed contact 5e of the first fixed plate 5a and the fixed contact 5f of the first fixed plate 5b are formed in a plate shape parallel to the bottom plate 1b, and both extend toward the center in the front-rear direction. The fixed contact 5e and the fixed contact 5f are arranged side by side in the vertical direction, and the movable contact 4a of the movable terminal plate 4 is sandwiched between the fixed contact 5e and the fixed contact 5f.

  The movable contact terminal 4b and the fixed plate terminals 5c and 5d penetrate the bottom plate 1b, and each protrudes toward the bottom surface of the bottom plate 1b. As a result of the arrangement, the movable contact 4a provided at the tip of the movable terminal plate 4 is in a position in contact with the bottom surface of the upper fixed contact 5e between the upper fixed contact 5e and the lower fixed contact 5f described above. It becomes. Further, the action part 4 c of the movable terminal plate 4 is located above the electromagnet 2 at a position spaced from the upper end of the electromagnet 2.

Moreover, the coil terminal 6 which connected the both ends of the lead wire of the coil 2a is formed of a steel member provided with a terminal portion 6a at the lower end and a connecting convex piece 6b around which the lead wire of the coil 2a is wound. 6a penetrates the bottom plate 1b and protrudes to the bottom surface side, and is disposed on the bottom plate 1b at a symmetrical position in the front-rear direction across the electromagnet 2.
In the present embodiment, the coil terminal 6 is formed by processing from a steel plate material. However, the present invention is not limited to this, and the coil terminal 6 may be formed from a metal plate material made of copper, a copper alloy, or the like.

  As described above, the electromagnet 2 is arranged at the approximate center of the upper surface of the bottom plate 1b. However, the electromagnet 2 has a circular heat conduction having a larger diameter and an appropriate thickness than the electromagnet 2 at the lower end of the standing electromagnet 2. It is fixed to the bottom plate 1 b through the conductive resin 8 and the heat radiating plate 7.

  More specifically, the surface of the heat conductive resin 8 made of a so-called high heat conductive resin is brought into close contact with the bottom surface of the core 2b, and the bottom surface of the heat conductive resin 8 and the upper surface of the heat radiating plate 7 are brought into close contact with each other. The bottom surface of the plate 7 is fixed to the upper surface of the bottom plate 1b. That is, the heat radiating plate 7 is interposed and fixed between the core 2b and the bottom plate 1b.

  The high thermal conductive resin constituting the thermal conductive resin 8 is a resin based on a polymer having a thermal conductivity of about 10 to 100 times that of a conventional plastic, but is not limited thereto. Further, a highly heat conductive resin based on urethane may be used.

The heat radiating plate 7 has a shape in which a tip portion of a flat bell-shaped steel plate material having an appropriate thickness is bent in an inverted L shape, and a heat radiating terminal 7a is formed at the tip portion, and the heat radiating terminal 7a is a bottom plate 1b. And protrudes toward the bottom surface of the bottom plate 1b.
In addition, in the present Example, although the heat sink 7 is processed and formed from the steel board | plate material, it is not limited to this, You may form from the metal board | plate materials which consist of copper, a copper alloy, etc.

  2, the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a are near the outer edge in plan view of the bottom plate 1b, and the heat radiating terminal 7a is the bottom plate 1b. The bottom plate 1b is penetrated in the vertical direction in the vicinity of the approximate center.

The electromagnetic relay 1 configured as described above is installed on a substrate 10 as shown in FIG.
The substrate 10 is a printed circuit board in which a wiring pattern layer 10a, an insulating layer 10b, a heat dissipation layer 10c, an insulating layer 10b, and a wiring pattern layer 10a are stacked in this order in the vertical direction.

  The movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, the terminal portion 6a, and the heat radiating terminal 7a of the electromagnetic relay 1 described above are inserted into the installation location of the electromagnetic relay 1 on the substrate 10, respectively. Each through hole is provided in advance. The through hole is provided with through-hole plating 11 that promotes penetration of the solder 20 and enhances adhesion, and the movable contact terminal 4b, the fixed plate terminal 5c, and the fixed plate terminal 5d are provided inside the through-hole plate 11. The electromagnetic relay 1 is installed by inserting the terminal portion 6a and the heat radiating terminal 7a, respectively.

  At this time, the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a are connected to the wiring pattern layer 10a by the solder 20 as shown in the enlarged view of a part in FIG. . The movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the side portion of the through hole into which the terminal portion 6a is inserted are provided with a vertical insulating layer 10b, and the through hole plating 11 and An insulating layer 10b is interposed between the heat dissipation layer 10c. Therefore, it is possible to prevent the heat released from the heat radiation terminal 7a from being transmitted through the heat radiation layer 10c and affecting the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a. ing.

  Further, the heat dissipating terminal 7a is connected to the heat dissipating layer 10c by solder 20 as shown in the enlarged view of portion b of FIG. More specifically, the heat radiating terminal 7a is connected by the solder 20 penetrating the upper surface side and the lower surface side of the substrate 10, and the upper surface portion and the lower surface portion of the substrate 10 to which the solder 20 is connected are the surrounding wiring patterns. The edge of the layer 10a is cut and connected independently, and the heat radiating terminal 7a is connected only to the heat radiating layer 10c. Accordingly, it is possible to prevent the heat radiated from the heat radiation terminal 7a from being transmitted through the wiring pattern layer 10a and affecting the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a. ing.

  Therefore, the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a are electrically connected by wiring (not shown) provided in advance on the wiring pattern layer 10a. More specifically, the terminal portion 6a is connected to a coil current path through which the coil 2a is energized. The fixing plate terminal 5c is connected to a first current path that is a first current path, and the fixing plate terminal 5d is connected to a second current path that is a second current path. Further, the movable contact terminal 4b is connected to the first current path and the second current path. Therefore, the movable contact 4a switches between the first current path and the second current path depending on whether the movable contact 4a is connected to the upper fixed contact 5e or the fixed contact 5f. In the state shown in FIG. 3, since the movable contact 4a is in contact with the upper fixed contact 5e, a current flows through the electromagnetic relay 1 in the first current path.

  Here, when the coil current path is energized by the control unit (not shown) through the terminal portion 6a, a current flows through the lead wire constituting the coil 2a and a magnetic force is generated in the electromagnet 2, and this magnetic force is generated by the electromagnet 2. It acts on the action part 4c of the movable terminal plate 4 located above and attracts the movable terminal plate 4.

  Therefore, the movable contact 4a moves to the fixed contact 5f side against the elastic force of the movable terminal plate 4, as shown in FIG. Thereby, the fixed contact 5e and the movable contact 4a are separated from each other, the first current path is cut, and the movable contact 4a and the fixed contact 5f are contacted to connect the second current path.

  When the energization of the coil current path through the terminal portion 6 a by the control unit is stopped, the magnetic force generated in the coil 2 a disappears, and the movable contact 4 a is moved by the elastic force of the movable terminal plate 4. It moves away from the fixed contact 5f (second current path cut), moves to the original fixed contact 5e side, and contacts the fixed contact 5e (first current path connection).

In this way, the electromagnetic relay 1 can switch between the first current path and the second current path by energization control of the coil current path of the control unit.
Note that, as in this embodiment, either the fixed plate terminal 5d and the fixed plate terminal 5c are not connected to the first current path and the second current path. By connecting only one to the current path, the electromagnetic relay 1 can be used as a switch for switching ON / OFF of the current path.

  According to the above embodiment, when the electromagnetic relay 1 is moved, the heat generated by the electromagnet 2 can be released to the lower side of the bottom plate 1b through the heat radiating plate 7. At this time, since the heat conductive resin 8 that is in close contact with the core 2b of the electromagnet 2 is interposed between the lower end of the core 2b and the surface of the heat radiating plate 7, the heat accumulated in the core 2b is efficiently transferred to the heat radiating plate 7. Can communicate. Therefore, the temperature rise inside the electromagnetic relay 1 surrounded by the bottom plate 1b and the case 1a can be reduced. Thereby, promotion of deterioration of coil 2a by the temperature rise inside this electromagnetic relay 1 can be controlled.

  Further, since the heat conductive resin 8 is formed of a resin having high heat conductivity, compared with the case where a steel one is used as a substitute for the heat conductive resin 8, the core 2b and the heat radiating plate 7 can be compared. Adhesiveness increases, and the heat of the core 2b can be transmitted to the heat sink 7 more efficiently.

  Further, since the bottom plate 1b is made of a low thermal conductive resin such as PBT, the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a installed through the bottom plate 1b. Furthermore, it is reduced that a part of the heat radiated from the heat radiating terminal 7a is transmitted through the bottom plate 1b.

  Further, the movable terminal plate 4, the fixed terminal plate 5, and the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a connected to the lead wires of the coil 2a are connected to the outer edge of the bottom plate 1b in plan view. By disposing the heat dissipating terminal 7a in the vicinity of the center of the bottom plate 1b in plan view, the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a and the heat dissipating terminal 7a are arranged. A certain separation distance is ensured, and a part of the heat radiated from the heat radiating terminal 7a is transmitted through the bottom plate 1b to move the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal. The influence on the portion 6a is further reduced.

In other words, since the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, the terminal portion 6a, and the heat radiating terminal 7a are independent in heat conduction, they are affected by the heat. Is preventing.
Therefore, temperature rise of the lead wire of the coil 2a, the movable terminal plate 4, and the fixed terminal plate 5 is suppressed by the heat accumulated in the core 2b.

  Further, the heat accumulated in the core 2b is dissipated through the heat dissipating terminal 7a, and the heat is dissipated from the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a to the air. Therefore, the heat radiation effect of the entire electromagnetic relay 1 can be improved.

  Further, the electromagnetic relay 1 is installed on the substrate 10, the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a are connected to the wiring pattern layer 10a, and the heat radiating terminal 7a is radiated. By connecting to the layer 10 c, the heat radiated from the core 2 b can be radiated to the side of the substrate 10 through the inside of the substrate 10. Further, the heat radiated from the heat radiating terminal 7a affects the movable contact terminal 4b, the fixed plate terminal 5c, the fixed plate terminal 5d, and the terminal portion 6a through the substrate 10, and further, the electromagnetic relay 1 internal The lead wire of the coil 2a, the movable terminal plate 4, and the fixed terminal plate 5 are prevented from rising in temperature.

In this embodiment, the heat radiating terminal 7a is connected to the heat radiating layer 10c, and the heat radiated from the heat radiating plate 7 is released into the substrate 10, but the length of the heat radiating terminal 7a is formed long. Then, it may be projected downward from the wiring pattern layer 10a of the substrate 10, and heat may be dissipated into the air from the protruding portion.
Furthermore, it is possible to provide a heat radiating means such as a heat radiating plate, a heat pipe, or a bus bar on the heat radiating terminal 7a, and the heat radiating means is not limited to the substrate 10.

The electromagnetic relay 30 of this embodiment is an electromagnetic relay that includes a heat radiation plate 31 that also serves as a coil terminal and integrally includes the heat radiation plate 7 and the coil terminal 6 of the electromagnetic relay 1 in the above-described first embodiment. The electromagnetic relay 30 will be described together with FIG. 5 showing the drawing, FIG. 6 showing the AA arrow cross-sectional view of the electromagnetic relay 30, and FIG. 7 showing the explanatory view explaining the bending process of the coil terminal combined heat sink 31.
In addition, in the configuration of the electromagnetic relay 30 other than the above-described coil terminal and heat radiating plate 31, the configuration indicated by the same reference numerals as those in the first embodiment is the same as the configuration of the electromagnetic relay 1 in the first embodiment. Detailed description will be omitted.

The coil terminal combined heat dissipation plate 31 (31a, 31b) includes a main body portion 32 (32a, 32b), a heat dissipation terminal 33 (33a, 33b), and a connecting convex piece 34 (34a) for winding the end portion of the lead wire of the coil 2a. , 34b). As shown in FIG. 7, the coil terminal combined heat radiation plate 31 is formed by folding up a portion surrounded by a connecting projection cutting line 61a from a thin steel plate member 60 having a rectangular shape in plan view in the direction of arrow A. The piece 34 is formed, and the portion surrounded by the cutting lines 61b and 61c for heat radiation is folded in the direction of arrow B to form the heat radiation terminal 33.
In this embodiment, the heat radiation plate 31 also serving as a coil terminal is formed by processing from a thin plate-like steel plate 60 having a rectangular shape in plan view, but is not limited thereto, and is a thin plate made of copper, copper alloy, or the like. You may form from a metal-made metal plate material.

  The coil terminal combined heat dissipation plate 31 includes an input side coil terminal combined heat dissipation plate 31a connected to an input side lead wire that supplies current to the coil 2a, and an output side that is a side from which current flows out of the coil 2a. The output side coil terminal combined heat dissipation plate 31b to which the lead wire is connected, and the input side coil terminal combined heat dissipation plate 31a and the output side coil terminal combined heat dissipation plate 31b are appropriately arranged in the front-rear direction across the electromagnet 2. It is fixed to the bottom plate 30b at symmetrical positions spaced apart from each other.

  More specifically, the coil terminal combined heat dissipating plate 31 is disposed so that the heat dissipating terminal 33 is in the vicinity of the center in the front-rear direction near the electromagnet 2, and the connecting convex piece 34 is on the outer side in the front-rear direction away from the electromagnet 2. On the other hand, the heat radiating terminal 33 that is substantially perpendicular to the lower side penetrates the bottom plate 30b and is fixed in such a manner as to protrude downward from the bottom surface side of the bottom plate 30b. And the main-body part 32 is connected to the electromagnet 2 in the state provided with heat conductivity through the heat conductive resin 8 provided with the insulation which made the surface closely_contact | adhere to the bottom face of the core 2b.

  The heat radiation terminal 33a of the input side coil terminal combined heat dissipation plate 31a is formed wider than the heat dissipation terminal 33b of the output side coil terminal combined heat dissipation plate 31b. As a result, as will be described later, in the configuration of the system when the electromagnetic relay 30 is connected to the substrate 10 to form a current path, the heat radiation terminal 33a is formed larger to dissipate heat on the input side of the electromagnetic relay 30. By raising, the heat dissipation effect of the electromagnetic relay 30 can be more efficiently enhanced.

  With the above configuration, as shown in FIG. 6, the movable contact terminal 4b and the fixed plate terminals 5c and 5d pass through the bottom plate 30b in the vertical direction near the outer edge of the bottom plate 30b and the heat dissipation terminal 33 near the center. Will be.

  The electromagnetic relay 30 configured as described above is installed on the substrate 10 in the same manner as the electromagnetic relay 1 in the first embodiment described above, but unlike the heat radiation terminal 7a of the electromagnetic relay 1 in the first embodiment, the heat radiation terminal. 33 is connected to the wiring pattern layer 10a (FIG. 3) by the solder 20. As a result, the coil 2a is connected to the coil current path for energizing the coil 2a, and the coil 2a is energized by the control unit (not shown) via the heat radiation terminal 33, the main body 32, and the connecting projection 34. Thus, the connection convex piece 34 of the electromagnetic relay 30 of the present embodiment can have the same function as the terminal portion 6a of the coil terminal 6 of the electromagnetic relay 1 of the first embodiment. Therefore, the heat radiation plate 31 also serving as the coil terminal can satisfy both functions of the coil terminal 6 and the heat radiation plate 7 of the electromagnetic relay 1 in the first embodiment.

The electromagnetic relay 30 configured as described above can obtain the same effects as those of the electromagnetic relay 1 in the first embodiment. The electromagnet 2 is provided with a connecting convex piece 34 composed of an input-side connecting convex piece 34a and an output-side connecting convex piece 34b, and the coil terminal heat sink 31 is integrally formed with the connecting convex piece 34a. By configuring the input side coil terminal combined heat radiation plate 31a and the output side coil terminal combined heat dissipation plate 31b integrally formed with the connection convex piece 34b, a current path that partially forms the connection convex piece 34a and the coil 2a. Therefore, it can be used as a heat dissipation path for the heat generated by the electromagnet 2, and the number of types of components can be reduced as compared with the case where the coil terminal 6 and the heat dissipation plate 7 are configured as separate components as in the first embodiment. Therefore, the cost of parts can be reduced, and the occurrence of assembly errors can be reduced as compared with the case where the parts are constituted by different parts.
Moreover, since the heat radiating terminal 33 and the connecting convex piece 34 are formed by bending a steel plate member 60, the processing cost of the electromagnetic relay 30 provided with the heat radiating terminal 33 and the connecting convex piece 34 can be reduced.

  Moreover, as shown in FIG. 7, since the coil terminal combined heat radiating plate 31 is formed by bending a steel plate material 60 having a rectangular shape in plan view, the plate material 60 is formed from a large steel plate as a raw material. The removal loss at the time of taking out can be reduced, and the number of taking out the plate material 60 can be factoryed. Therefore, the material cost for the coil terminal heat sink 31 can be reduced. More specifically, compared with the case of taking out a plate material with a large removal loss such as a circle from a large metal plate that is a raw material, it is possible to reduce the labor and cost for recovering and reusing the lost portion such as a surplus. it can.

  In addition, since the heat radiation terminal 33 is located near the center of the electromagnet 2 in the plan view and the connecting convex piece 34 is located outside the heat radiation terminal 33 in the plan view, the coil terminal combined heat dissipation plate 31 is disposed. The transmission path for radiating the heat generated by the electromagnet 2 can be configured to be short, and the heat can be efficiently radiated from the heat radiating terminal 33 of the coil terminal and radiating plate 31. Therefore, it is possible to reduce the influence of the heat generated by the electromagnet 2 on the connection convex piece 34. Further, by disposing the heat radiating terminal 33 of the coil terminal combined heat radiating plate 31 inside the bottom plate 30b in plan view, the coil terminal combined heat radiating plate 31 affects the peripheral components of the electromagnetic relay 30 installed on the same substrate 10. Can be prevented.

  Furthermore, the heat radiating terminal 33 of the coil terminal heat radiating plate 31 can be isolated in a balanced manner from the movable contact terminal 4b and the fixed plate terminals 5c and 5d. Accordingly, the influence of heat applied to the movable contact terminal 4b and the fixed plate terminals 5c and 5d can be reduced in a balanced manner.

  Further, the shape of the heat dissipation terminal 33 is made different between the input side coil terminal combined heat dissipation plate 31a and the output side coil terminal combined heat dissipation plate 31b so that the heat dissipation terminal 33a is formed wider than the heat dissipation terminal 33b. The heat radiation effect of the input side coil terminal combined heat dissipation plate 31a and the output side coil terminal combined heat dissipation plate 31b can be made different. Therefore, for example, according to the connection situation and installation environment of the electromagnetic relay 30 such as increasing the heat dissipation effect with the input side coil terminal combined heat dissipation plate 31a and decreasing the heat dissipation effect with the output side coil terminal combined heat dissipation plate 31b, The optimum heat dissipation effect can be obtained without waste.

  In the present embodiment, the heat radiating terminal 33a is formed wider than the heat radiating terminal 33b, but conversely, the heat radiating terminal 33b is replaced with the heat radiating terminal 33a according to the connection status or installation environment of the electromagnetic relay 30. It may be formed wider. Thereby, a more efficient heat radiation effect can be obtained according to the electromagnetic relay 30 connection status, installation environment, and the like.

The electromagnetic relay 40 of this embodiment is an electromagnetic relay provided with a heat radiation plate 31 that also serves as a coil terminal, in which the heat radiation plate 7 and the coil terminal 6 of the electromagnetic relay 1 of the first embodiment are integrally formed, as in the second embodiment. Yes, with FIG. 8 showing a longitudinal front view of the electromagnetic relay 40, FIG. 9 showing a sectional view taken along the line AA of the electromagnetic relay 40, and FIG. 10 showing an explanatory view for explaining the bending process of the heat radiation plate 41 also serving as a coil terminal The electromagnetic relay 40 will be described.
In addition, in the configuration of the electromagnetic relay 40 other than the above-described coil terminal and heat sink 41, the configuration indicated by the same reference numerals as those in the first embodiment is the same as the configuration of the electromagnetic relay 1 in the first embodiment. Detailed description is omitted.

  Similarly to the coil terminal combined heat sink 31 in the second embodiment, the coil terminal combined heat dissipating plate 41 of the electromagnetic relay 40 is connected to the main body 42, the heat dissipating terminal 43, and the end of the lead wire of the coil 2a. It consists of a piece 44. As shown in FIG. 10, the coil terminal combined heat radiation plate 41 is formed by folding up a portion surrounded by a connecting projection cutting line 62a from a thin steel plate member 60 having a rectangular shape in plan view in the direction of arrow A. A piece 44 is formed, and a portion surrounded by the heat radiation terminal cutting line 62b is folded in the direction of arrow B to form the heat radiation terminal 43.

  Unlike the input side coil terminal combined heat radiating plate 31a and the output side coil terminal combined heat radiating plate 31b of the second embodiment, the coil terminal combined heat radiating plate 41 has an input side lead wire that is a side for supplying current to the coil 2a. The input side to be connected and the output side to which the output-side lead wire from which the current flows out from the coil 2a are also configured by the same coil terminal-use heat radiation plate 41, and each is separated by an appropriate interval in the front-rear direction. It is fixed to the bottom plate 40b at a point-symmetrical position with respect to 2.

With the above configuration, the electromagnetic relay 40 can obtain the same effects as those of the electromagnetic relay 1 in the first embodiment, as in the second embodiment. In addition, the connection convex piece 44 that is energized with the electromagnet 2 is integrally formed with the heat radiation plate 41 that also serves as a coil terminal, so that the coil terminal 6 and the heat radiation plate 7 in the electromagnetic relay 1 of Example 1 are configured as separate parts. In comparison, the number of types of parts can be reduced. Therefore, the cost of parts can be reduced, and the occurrence of assembly errors can be reduced as compared with the case where the parts are constituted by different parts.
Moreover, since the heat radiating terminal 43 and the connecting convex piece 44 are formed by bending a steel plate 60, the processing cost of the electromagnetic relay 40 provided with the heat radiating terminal 43 and the connecting convex piece 44 can be reduced.

  In addition, since the heat radiation terminal 43 is located near the center of the electromagnet 2 in a plan view and the connection convex piece 44 is located outside the heat radiation terminal 43 in a plan view, the coil terminal combined heat radiation plate 41 is disposed. Heat generated by the electromagnet 2 can be efficiently radiated from the heat radiating terminal 43 of the coil terminal and heat radiating plate 41 disposed in the vicinity. Therefore, it is possible to reduce the influence of the heat generated by the electromagnet 2 on the connection convex piece 44. Further, by disposing the heat radiation terminal 43 of the coil terminal combined heat radiation plate 41 inside the bottom plate 40b in plan view, the coil terminal combined heat radiation plate 41 affects the peripheral components of the electromagnetic relay 40 installed on the same substrate 10. Can be prevented.

  Furthermore, the heat radiating terminal 43 of the coil terminal combined heat radiating plate 41 can be isolated in a balanced manner from the movable contact terminal 4b and the fixed plate terminals 5c and 5d. Accordingly, the influence of heat applied to the movable contact terminal 4b and the fixed plate terminals 5c and 5d can be reduced in a balanced manner.

  In addition, as shown in FIG. 10, the coil terminal combined heat sink 41 of the present embodiment has a portion surrounded by a cutting line 62a for connecting convex pieces from a thin steel plate member 60 having a rectangular shape in a plan view. The connection convex piece 44 is formed by folding up and the portion surrounded by the cutting line 62b for heat radiation is folded in the direction of the arrow B to form the heat radiation terminal 43. As shown in FIG. The coil terminal combined heat radiation plate 41 may be formed of a plate material 60 provided with a fold line 64 substantially parallel to the fold line 64 and a hook-shaped connecting convex piece cutting line 63a perpendicular to the fold line 64.

  In this case, the heat radiating terminal 43 portion is folded in the direction of arrow C along the fold line 64 to form the heat radiating terminal 43 downward in the direction substantially perpendicular to the main body portion 42, and to the main body portion 42. On the other hand, it is possible to simultaneously form the upward connecting convex pieces 44 in a substantially right angle direction. Thereby, the number of processes for bending which forms the coil terminal combined heat sink 41 can be reduced.

The electromagnetic relay 50 of the present embodiment will be described with FIG. 12 showing an enlarged cross-sectional view of the vicinity of the electromagnet 2 of the electromagnetic relay 50 connected to the substrate 59.
The electromagnetic relay 50 of this embodiment is also used as the heat radiation plate 7 of the electromagnetic relay 1 of the first embodiment, the heat radiation plate 31 of the electromagnetic relay 30 of the second embodiment, and the coil terminal of the electromagnetic relay 40 of the third embodiment. In order to dissipate the heat generated by the electromagnet 2 such as the heat radiating plate 41 to the outside, the member is configured by the heat sink 51, and the configuration indicated by the same reference numerals as those in the first embodiment in the configuration of the electromagnetic relay 50 Since the configuration is the same as that of the relay 1, detailed description thereof is omitted in this embodiment.

  The heat sink 51 is formed of a copper member having a high thermal conductivity in the shape of a circular cylinder having a slightly circular diameter and is connected to the lower surface of the electromagnet 2 via the thermal conductive resin 8. In addition, although the heat sink 51 of a present Example was formed with the column-shaped copper member, you may comprise by the member with the high heat dissipation performance formed with the steel member which plated the surface of the other columnar steel member with copper.

  And the electromagnetic relay 50 which fixed the heat sink 51 in the aspect protruded below from the baseplate 50b is connected to the board | substrate 59 provided with the heat radiating layer 59a on the surface. More specifically, the lower end of the heat sink 51 and the surface of the heat dissipation layer 59a are connected with the solder 20, and the electromagnetic relay 50 is surface-mounted on the substrate 59 through the heat sink 51. Although it is formed by processing from a thin plate-like steel plate 60 having a rectangular shape in plan view, it is not limited thereto, and may be formed from a thin plate-like metal plate made of copper, a copper alloy, or the like.

  Accordingly, the heat accumulated in the electromagnet 2 can be efficiently radiated more efficiently by the heat sink 51 partially connected to the core 2 b of the electromagnet 2 via the heat conductive resin 8.

In correspondence between the configuration of the present invention and the above-described embodiment,
The fixed contact terminal of the present invention corresponds to the fixed terminal plate 5 and the fixed contacts 5e and 5f,
Similarly,
The movable contact terminal corresponds to the movable terminal plate 4 and the movable contact 4a,
The electromagnetic coil corresponds to the electromagnet 2,
The action part corresponds to the action part 4c,
The fixing plate corresponds to the bottom plates 1b, 30b, 40b, 50b,
The heat radiating member corresponds to the heat radiating plate 7, the heat radiating plates 31 and 41 serving as coil terminals, and the heat sink 51,
The lead terminal corresponds to the coil terminal 6 and the connecting convex pieces 34 and 44,
The terminal protrusions correspond to the movable contact terminal 4b, the fixed plate terminals 5c and 5d, and the terminal portion 6a.
The protrusions correspond to the heat radiating terminals 7a, 33, 43,
The heat conductive material corresponds to the heat conductive resin 8,
The input side lead terminals correspond to the connecting convex pieces 34a and 44,
The output-side lead terminals correspond to the connecting convex pieces 34b and 44,
The input side heat dissipation member corresponds to the input side coil terminal combined heat dissipation plate 31a,
The output side heat dissipation member corresponds to the output side coil terminal combined heat dissipation plate 31b,
Low thermal conductivity material is compatible with resin,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

The longitudinal section front view of an electromagnetic relay. AA arrow sectional drawing of an electromagnetic relay. BB arrow sectional drawing of the electromagnetic relay installed in the board | substrate. Explanatory drawing about switching of the movable contact of the electromagnetic relay installed in the board | substrate. FIG. 6 is a longitudinal front view of an electromagnetic relay according to a second embodiment. AA arrow sectional drawing of the electromagnetic relay of Example 2. FIG. Explanatory drawing explaining the bending process of the electromagnetic relay of Example 2. FIG. FIG. 6 is a longitudinal front view of an electromagnetic relay according to a third embodiment. AA arrow sectional drawing of the electromagnetic relay of Example 3. FIG. Explanatory drawing explaining the bending process of the electromagnetic relay of Example 3. FIG. Explanatory drawing explaining another bending process. The expanded sectional view of the electromagnetic relay of Example 4 installed in the board | substrate. The longitudinal cross-sectional front view of the conventional electromagnetic relay. CC arrow sectional drawing of the conventional electromagnetic relay.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electromagnetic relay 1b ... Bottom plate 2 ... Electromagnet 2b ... Core 4 ... Movable terminal plate 4a ... Movable contact 4b ... Movable contact terminal 4c ... Action part 5 ... Fixed terminal plate 5c ... Fixed plate terminal 5d ... Fixed plate terminal 5e , 5f ... fixed contact 6 ... coil terminal 6a ... terminal portion 7 ... heat dissipation plate 7a ... heat dissipation terminal 8 ... thermal conductive resin 10, 59 ... substrate 10c, 59a ... heat dissipation layer 10d ... second insulating layer 10e ... wiring pattern layer 31, 41 ... coil terminal combined heat dissipation plate 31 a ... input side coil terminal combined heat dissipation plate 31 b ... output side coil terminal combined heat dissipation plate 34 a, 34 b, 44 ... connection convex piece 51 ... heat sink 60 ... plate material

Claims (12)

A fixed contact terminal, a movable contact terminal,
An electromagnetic coil for moving the movable contact terminal to switch the contact state with the fixed contact terminal;
The core, the fixed contact terminal, the movable contact terminal, the electromagnetic coil, and a fixed plate for fixing the core;
A projecting portion protrudes outside the fixed plate without contacting the fixed contact terminal and the movable contact terminal, and an electromagnetic wave provided with a heat radiating member interposed and fixed between the fixed plate and the core relay. The fixing plate,
The electromagnetic relay according to claim 1, wherein the electromagnetic relay is formed of a low thermal conductivity material having lower thermal conductivity than the heat dissipation member. The electromagnetic relay according to claim 1, wherein a heat conductive material is interposed between the core and the heat dissipation member. A lead terminal connected to the electromagnetic coil;
The fixed contact terminal, the movable contact terminal, and each part of the lead terminal of the electromagnetic coil are protruded to the outside of the fixed plate as terminal protruding portions,
The terminal protrusions are arranged near the outer edge of the fixing plate,
The protrusion of the heat dissipation member
The electromagnetic relay according to claim 1, wherein the electromagnetic relay is disposed inside the fixed plate in a plan view and provided outside the fixed plate. The protrusion of the heat dissipation member
The electromagnetic relay according to claim 1, wherein the electromagnetic relay is disposed near a center of the fixed plate in plan view. Comprising a lead terminal constituted by an input side lead terminal and an output side lead terminal to be energized with the electromagnetic coil;
The heat dissipating member,
An input side heat dissipation member integrally formed with the input side lead terminal;
The electromagnetic relay according to claim 1, 2, or 3, comprising an output-side heat radiation member formed integrally with the output-side lead terminal. The heat radiating member is formed of a plate made of steel, copper or a copper alloy,
The lead terminal and the protruding portion of the heat dissipation member,
The electromagnetic relay according to claim 6, wherein the electromagnetic relay is formed by bending from the plate material. The projecting portion is near the center in plan view near the electromagnetic coil, and the lead terminal is on the plan view outer side than the projecting portion,
The electromagnetic relay according to claim 6 or 7, wherein the heat dissipating member is arranged. The electromagnetic relay according to claim 6, wherein the input side heat radiating member and the output side heat radiating member have the same shape. 9. The electromagnetic relay according to claim 6, wherein the shape of the protruding portion of the input side heat radiating member is different from the shape of the protruding portion of the output side heat radiating member. The heat dissipating member,
The electromagnetic relay according to claim 1, 2 or 3 configured with a heat sink. An electromagnetic relay according to any one of claims 1 to 10, and a board on which the electromagnetic relay is installed,
The substrate is constituted by a heat dissipation layer formed of metal, a wiring pattern layer, and an insulating layer interposed between the heat dissipation layer and the wiring pattern layer,
Connecting each terminal protrusion to the wiring pattern layer;
The electromagnetic relay unit which connected the protrusion part of the said thermal radiation member to the said thermal radiation layer.

Images