JP5506319B2 - Electromagnetic relay - Google Patents

Description

The present invention relates to an electromagnetic relay device.

  There is known an electromagnetic relay that has a make contact, a break contact, and a common contact, and switches the common contact to the make contact side or the break contact side by exciting and de-exciting the coil (see, for example, Patent Document 1). In the electromagnetic relay described in Patent Document 1, a pair of a make terminal connected to a make contact, a break terminal connected to a break contact, and a break terminal connected to a common contact are provided, and heat dissipation generated at the contact portion is dissipated. I try to increase the sex.

JP 2002-329447 A

  By the way, with the recent spread of in-vehicle electric power steering and the like, a large current of, for example, 60 A flows through the electromagnetic relay, and the amount of heat generated at the contact portion tends to increase. Therefore, as in the electromagnetic relay described in Patent Document 1, it is not sufficient to provide a plurality of terminals to improve heat dissipation.

The present invention is an electromagnetic relay provided with a movable contact that is driven in accordance with the operation of an electromagnet, and a fixed normally open contact and a fixed normally closed contact that are arranged to face the movable contact with the movable contact in between. The movable contact, fixed normally open contact, and fixed normally closed contact are contacted when the movable contact and fixed normally open contact are contacted, and when the movable contact and fixed normally closed contact are contacted. A plurality of movable terminals connected to the movable contact and a fixed terminal for the normally open contact connected to the fixed normally open contact are provided for each movable contact and each fixed normally open contact. formed while in correspondence Ru provided with a plurality, normally a closed contact fixed terminal connected to a fixed normally closed contact is a single fixed terminal normally closed contact, a plurality of movable contacts, tip branches Provided at the tip of each movable spring member Characterized in that it is.

  According to the present invention, the amount of heat generated at the contact portion can be sufficiently suppressed, and the present invention can be easily applied to an electromagnetic relay in which a large inrush current flows.

It is a disassembled perspective view of the electromagnetic relay which concerns on embodiment of this invention. It is a perspective view which shows the assembly structure of the electromagnetic relay which concerns on embodiment of this invention. FIG. 3 is a perspective view with the cover of FIG. 2 omitted. It is the perspective view which excluded the base block of FIG. It is the perspective view seen from the other side of FIGS. It is VI-VI sectional drawing of FIG. It is a perspective view which shows the 1st modification of the electromagnetic relay which concerns on this Embodiment. It is a perspective view which shows the 2nd modification of the electromagnetic relay which concerns on this Embodiment. It is a perspective view which shows the 3rd modification of the electromagnetic relay which concerns on this Embodiment. It is a perspective view which shows the 4th modification of the electromagnetic relay which concerns on this Embodiment. It is a perspective view (figure seen from the lower part) of the composite type electromagnetic relay which concerns on embodiment of this invention. It is a perspective view (figure seen from the upper part) of the composite type electromagnetic relay which concerns on embodiment of this invention. It is a longitudinal cross-sectional view in the contact part of the composite type electromagnetic relay of FIG. It is IV-IV sectional drawing of FIG. It is a perspective view of the cover which comprises the composite type electromagnetic relay which concerns on embodiment of this invention. It is a figure which shows the obstruction | occlusion procedure of the through-hole provided in the cover of FIG. It is a perspective view which shows the 1st modification of FIG. It is a perspective view which shows the 2nd modification of FIG. It is a perspective view which shows the 3rd modification of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view of an electromagnetic relay according to the present embodiment, and FIGS. 2 to 5 are perspective views showing the assembly structure (a diagram viewed from an oblique front and a diagram viewed from an oblique rear). 6 is a sectional view taken along line VI-VI in FIG. In the following, for the sake of convenience, front and rear, left and right directions and up and down directions are defined as shown in the figure, and the configuration of each part will be described accordingly. The electromagnetic relay according to the present embodiment can be suitably used for open / close control of an electric circuit in which a relatively large inrush current such as 60 A flows, for example, at the moment when the contact is closed, such as in-vehicle electric power steering. It can also be used for other applications.

  The electromagnetic relay 50 according to the present embodiment includes a base block 1, an electromagnet 2 incorporated in the base block 1, a contact portion 3 that opens and closes when the electromagnet 2 operates, and a cover that surrounds the electromagnet 2 and the contact portion 3. 4. 3 and 5, the cover 4 is not shown in FIGS. 3 and 5, and the base block 1 and the cover 4 are not shown in FIG. Further, in FIG. 5, illustration of an upper wall 20e (FIG. 3) of a later-described reel 22 is omitted. The contact portion 3 is configured as a transfer contact, and can be switched between a make side and a break side as will be described later.

  As shown in FIG. 1, the base block 1 is an electrically insulating resin molded product, and includes a substantially rectangular frame portion 10 and a bottom surface portion 11 that closes the bottom surface of the frame portion 10. The base block 1 is formed with a recessed portion 12 opened upward by the frame portion 10 and the bottom surface portion 11, and the electromagnet 2 and the contact portion 3 are fixedly supported by the recessed portion 12. The cover 4 is fixed to the frame portion 11 of the base block 1 by adhesion.

  The electromagnet 2 includes a winding body 20 having a hollow body (not shown) extending in the vertical direction and flanges 20a and 20b at both upper and lower ends thereof, an iron core 21 accommodated in the hollow body of the winding frame 20, And a coil 22 mounted on the hollow body portion of the winding frame 20. The lower flange portion 20 b of the winding frame 20 is fixedly supported by the recess 12 of the base block 1.

  A stepped portion 20c is formed at the center of the left and right side ends of the upper flange portion 20a of the reel 20, and the width in the left-right direction on the front side of the stepped portion 20c is narrowed. A pair of side walls 20d is erected. The upper end portion of each side wall 20d is bent outward in the left-right direction, and the left and right end surfaces of the upper end portion of the side wall 20d and the left and right end surfaces of the upper flange portion 20a behind the same are on the same plane. Above the front end of the upper flange 20a, an upper wall 20e parallel to the upper flange 20a is installed between the left and right side walls 20d, and the upper flange 20a, the left and right sidewalls 20d, and the upper wall 20e A substantially box-shaped space SP whose surface is opened is formed. A slit 20f is formed at the upper end of the left and right side walls 20d in parallel with the upper wall 20e from the front end surface to the rear. The above-described winding frame 20 is configured as an electrically insulating resin molded product, and each part is integrally formed.

  The iron core 21 is a columnar member formed by punching a magnetic steel sheet into a predetermined shape, for example, and its upper end surface 21a is exposed to the outside from the upper flange portion 20b of the winding frame 20 in the assembled state, and is located inside the hollow body portion. Fixedly supported. The coil 22 is configured by winding a winding around the outer peripheral surface of the hollow body between the flanges 20 a and 20 b of the winding frame 20, and both ends of the winding are a pair of left and right fixed to the base block 1. Each is connected to the coil terminal portion 23. The yoke 24 is fixedly connected to the lower end of the iron core 21 by caulking, for example.

  The yoke 24 is a plate-like member that is punched out of a magnetic steel plate into a predetermined shape and bent to have an L-shaped cross section. In the assembled state, the yoke 24 extends below the lower flange portion 20b of the winding frame 20 in the front-rear direction. In addition, the rear side of the hollow body 20a of the winding frame 20 extends in the vertical direction. The upper end 24a of the yoke 24 is located at substantially the same height as the upper end surface 21a of the iron core 21, and the armature 25 is supported by the upper end 24a.

  The armature 25 is a flat plate member formed by punching a magnetic steel plate into a predetermined shape, for example. In the assembled state, the armature 25 is disposed substantially horizontally above the upper flange portion 20a of the reel 20 as shown in FIG. Is done. At this time, the rear end portion of the armature 25 abuts on the upper end 24 a of the yoke 24 and is swingably supported, and the front lower surface of the armature 25 is disposed to face the upper end surface 21 a of the iron core 21. Thus, when the electromagnet 2 is activated, a magnetic circuit is formed between the iron core 21, the yoke 24 and the armature 25.

  The armature 25 is connected to the yoke 24 via a movable spring member 26 so as to be elastically movable relative to the yoke 24. As shown in FIGS. 1 and 5, the movable spring member 26 is a conductive leaf spring member that is punched into a predetermined shape, for example, from a thin plate of phosphor bronze for spring and bent into a substantially L shape. For example, the vertical portion 26a fixed to the rear surface by caulking, the horizontal portion 26b fixed to the upper surface of the armature 25 by caulking, for example, and the vertical portion 26a and the horizontal portion 26b bend in a U shape and extend. A pair of left and right hinge spring portions 26c and a pair of left and right spring arm portions 26d that are separated from the horizontal portion 26b in the left-right direction and extend forward in a bifurcated shape are integrally provided.

  The movable spring member 26 functions as an elastic hinge between the yoke 24 and the armature 25, and the armature 25 is attached in a direction (upward) away from the upper end surface 21a of the iron core 21 by the spring action of the hinge spring portion 26c. Rush. A movable contact 30 swelled from the upper and lower surfaces of the spring arm 26d and made of a predetermined contact material is attached to the tip of each spring arm 26d by, for example, caulking (see FIG. 6). The spring arm portion 26d of the movable spring member 26 is inserted from behind into the space SP between the upper wall 20e of the winding frame 20 and the upper flange portion 20a, and the movable contact 30 is disposed in the space SP.

  A movable terminal member 31 is fixed to the rear surface of the vertical portion 26a of the movable spring member 26 by, for example, caulking. The movable terminal member 31 is, for example, a conductive plate member that is formed by bending a copper plate into a predetermined shape and bent, and includes a rear plate portion 31a that extends in the vertical direction and is attached to the movable spring member 26, and a rear plate portion 31a. A pair of left and right terminal portions 31b formed by bending the left and right end portions forward at a substantially right angle and extending downward from the rear plate portion 31a are integrally provided. That is, the movable terminal member 31 has left and right terminal portions 31 b corresponding to the left and right movable contacts 30. The bent terminal portion 31 b is arranged along the left and right corners of the rear end of the recess 12 of the base block 1 and penetrates the bottom surface portion 11 of the base block 1 in the vertical direction.

  As shown in FIG. 1, the contact portion 3 includes a first fixed terminal member 32 and a second fixed terminal member 33. The first fixed terminal member 32 is, for example, a conductive plate member that is formed by bending from a copper plate into a predetermined shape, and a front plate portion 32a that extends vertically in front of the winding frame 20 and a front plate portion 32a. The horizontal part 32b formed by bending the upper part of the rear part at a substantially right angle and separated from the upper part of the front plate part 32a in the left-right direction and extending in a bifurcated manner, and the left and right end parts of the front plate part 32a are substantially rearward. A pair of left and right terminal portions 32c that are bent at a right angle and extend downward from the front plate portion 32a are integrally provided.

  Each horizontal portion 32b is inserted into the space SP below the upper wall 20e from the front of the reel 20, and is positioned below the spring arm portion 26d of the movable spring member 26 in the assembled state, as shown in FIG. On the upper surface of each horizontal portion 32b, a lower fixed contact 34 made of a predetermined contact material is attached so as to face each movable contact 30 and bulge upward, for example, by caulking, and the first fixed terminal member 32 has left and right Corresponding to the lower fixed contact 34, the left and right terminal portions 32c are provided. As shown in FIG. 3, the bent terminal portion 32 c is disposed along the left and right corners of the front end of the recess 12 of the base block 1 and penetrates the bottom surface portion 11 of the base block 1 in the vertical direction.

  The second fixed terminal member 33 is, for example, a conductive plate member that is bent and formed from a copper plate into a predetermined shape. The horizontal portion 33a extending in the left-right direction and both left and right end portions of the horizontal portion 33a are substantially downward. A pair of left and right side plate portions 33b formed by bending at right angles and extending rearward from the horizontal portion 33a and a pair of left and right terminal portions 33c extending downward from the rear side of each side plate portion 33b are integrally formed. Have.

  The horizontal portion 33a is inserted into the slit 20f of the reel 20 from the front, and is positioned above the spring arm portion 26d of the movable spring member 26 in the assembled state as shown in FIG. At this time, as shown in FIG. 3, the side plate portion 33b is disposed in front of the stepped portion 20b of the winding frame 20, and the left and right end surfaces of the side plate portion 33b are flush with the left and right end surfaces of the upper flange portion 20a. Above the base block 1, the left and right end surfaces of the terminal portions 31b, 32c, and 33c are also flush with the left and right end surfaces of the upper flange portion 20a, and each component of the electromagnetic relay 50 is compact in a limited space. Is arranged.

  As shown in FIG. 6, on the lower surface of the horizontal portion 33a of the second fixed terminal member 33, upper fixed contacts 35 made of a predetermined contact material are bulged downward by caulking, for example, facing each movable contact 30. Attached. As shown in FIG. 3, the second fixed terminal member 33 has left and right terminal portions 33 c corresponding to the left and right upper fixed contacts 35. The terminal portion 33 c is disposed behind the terminal portion 32 c of the first fixed terminal member 32 in substantially parallel to the terminal portion 32 c and penetrates the bottom surface portion 11 of the base block 1 in the vertical direction.

  In the assembled state of the electromagnetic relay 50, as shown in FIG. 3, the terminal portion 32c, the terminal portion 33c, the coil terminal portion 23, and the terminal portion 31b are juxtaposed in the front-rear direction from the left and right ends of the base block 1, and these terminals The heights of the lower ends of the parts 32c, 33c, 23, 31b are substantially equal to each other. Any one of the terminal portions 32c, 33c, 23, 31b or all the terminal portions 32c, 33c, 23, 31b can be formed integrally with the base block 2. Since each terminal part 32c, 33c, 23, 31b is distributed over the whole of the electromagnetic relay 50 in the front-rear and left-right directions, it is necessary to ensure a sufficient distance between the terminal parts while reducing the size of the electromagnetic relay 50. The circuit pattern can be easily formed.

  Next, main operations of the electromagnetic relay 50 according to the present embodiment will be described. When an operating voltage is not applied to the coil 22 of the electromagnet 2, the movable spring member 26 exhibits a spring action between the armature 25 and the yoke 24, and the armature 25 is away from the upper end surface 21 a of the iron core 21. Energize (upward). As a result, as shown in FIG. 6, the movable contact 30 is held stationary at a non-operating position (restoration position) separated from the lower fixed contact 34 by a predetermined distance, and the left and right movable contacts 30 are respectively fixed to the left and right upper fixed contacts 35. Abuts under pressure.

  On the other hand, when an operating voltage is applied to the coil 22 of the electromagnet 2, the armature 25 is attracted to the upper end surface 21a of the iron core 21 against the spring force of the movable spring member 26 by the magnetic attraction force, and the movable contact 30 is Move down. As a result, the left and right movable contacts 30 abut against the left and right lower fixed contacts 34 under a predetermined pressure, respectively, and the movable contacts 30 are held stationary at the operating position.

  In such an electromagnetic relay 50, the movable contact 30, the upper fixed contact 35, and the lower fixed contact 34 constitute a common contact (common contact), a normally closed contact (break contact), and a normally open contact (make contact), respectively. Here, since the respective contacts 30, 34, 35 are provided on the left and right, a parallel circuit is formed between the contacts 30, 35 when the electromagnet 2 is not operated, and parallel between the contacts 30, 34 when the electromagnet 2 is operated. A circuit is formed. As a result, the current branches and flows between the contacts 30 and 35 when the electromagnet 2 is not operated, and flows between the contacts 30 and 34 when the electromagnet 2 is operated.

  When the current is divided between the contacts 30 and 34 and between the contacts 30 and 35 in this way, the current flowing between the contacts 30 and 34 and between the contacts 30 and 35 becomes small. Can be reduced. Further, since the contact resistance between the contacts 30 and 34 and between the contacts 30 and 35 decreases due to the decrease in the amount of heat generation, the total amount of heat generation at the contacts 30, 34 and 35 can be greatly reduced.

  Heat generated at the contacts 30, 34, and 35 is transferred to the movable terminal member 31, the first fixed terminal member 32, and the second fixed terminal member 33, respectively, and is transferred to the outside of the electromagnetic relay 50 through the terminal portions 31b, 32c, and 33c. Heat is dissipated. In this case, since the terminal portions 31b, 32c, and 33c are provided on the left and right sides corresponding to the contact points 30, 34, and 35, the heat generated at the contact points 30, 34, and 35 is transferred to the corresponding terminal portion 31b. , 32c, 33c can be radiated well, and efficient radiating is possible. In particular, since the movable contact 30 and the lower fixed contact 34 are provided separately on the left and right, heat transfer to the corresponding terminal portions 31 b and 33 c is promoted, and heat can be uniformly radiated from the entire electromagnetic relay 50.

  Thus, in the present embodiment, the movable contact 30, the lower fixed contact 34, and the upper fixed contact 35 are provided on the left and right, respectively, and the terminal portions 31b, 32c, and 33c are provided on the left and right, respectively, corresponding to the contacts 30, 34, and 35. Therefore, the amount of heat generated in the contact portion 3 can be suppressed, and efficient heat dissipation to the outside is possible. Therefore, the present invention can be easily applied to a control circuit for an in-vehicle electric power steering or the like in which a large inrush current flows in the electromagnetic relay 50. In addition, since the amount of generated heat is suppressed, a compact configuration that can be mounted on a printed circuit board can be achieved.

In the above embodiment, the terminal portion 31b connected to the movable contact 30, the terminal portion 32c connected to the lower fixed contact 34, and the terminal portion 33c connected to the upper fixed contact 35 are provided on the left and right, respectively. Since the break contact does not flow as much current as the make contact, the terminal portion 33c connected to the upper fixed contact 35 may be provided only on either the left or right side. FIG. 7 is a perspective view showing an example. FIG. 7A shows a perspective view of the second fixed terminal member 33, and FIG. 7B shows a perspective view of the electromagnetic relay 50 incorporating the second fixed terminal member 33. Although the terminal portion 33c is provided only on the right side of the second fixed terminal member 33 in the figure, it may be provided only on the left side. Thus, if the terminal part 33c is provided only in one of right and left, the assemblability of the electromagnetic relay 50 can be further improved.

  In the above embodiment, the horizontal portion 32b of the first fixed terminal member 32 is divided into two in the left-right direction. However, as shown in FIG. 8, not only the horizontal portion 32b but also the front plate portion 32a is divided into two in the left-right direction. May be formed. As a result, the contact 34 and the terminal portion 32c of the first fixed terminal member 32 are completely separated to the left and right, so that the contact abnormality of the contact 34 can be checked for each contact, and there is an abnormality in either the left or right contact 34. Can be easily determined.

  In the above-described embodiment, the terminal portions 31b, 23, 32c, and 33c are formed with a constant width in the front-rear direction across the distal end portion. For example, the terminal portions 31b, 32c, and 33c may be formed wide. FIG. 9 is a perspective view showing an example thereof. In the figure, the widths of the terminal portions 31b, 32c, and 33c are enlarged below the base block 1, respectively. As a result, the surface areas of the terminal portions 31b, 32c, and 33c are increased, so that heat dissipation can be further improved.

  In the above embodiment, the terminal portions 31b, 23, 32c, and 33c are formed straight in the vertical direction. However, as shown in FIG. 10, the tips of the terminal portions 31b, 23, 32c, and 33c are bent in the left-right direction. It may be. Thereby, the electromagnetic relay 50 can be easily mounted on the substrate. 9 and 10, the front plate portion 32a of the first fixed terminal member 32 is divided into two parts, but may be integrated as shown in FIG.

  In the above-described embodiment, the base block 1, the cover 4, and the winding frame 20 are resin-molded. At this time, a resin material having good heat resistance such as a liquid crystal polymer is used as a constituent material. You may make it shape | mold. The lower fixed contact 34 (fixed normally open contact) as a normally open contact and the upper fixed contact 35 (fixed normally closed contact) as a normally closed contact are arranged above and below the movable contact 30, but the fixed normally open contact The arrangement of the fixed normally closed contact and the movable contact is not limited to this. Although the movable contact 30, the lower fixed setting 34, and the upper fixed contact 35 are disposed on the left and right, respectively, three or more may be disposed, or a plurality of these may be disposed in the front-rear direction and the oblique direction.

  The terminal portion 31b (movable terminal), the terminal portion 32c (fixed terminal for normally open contact), and the terminal portion 33c (fixed terminal for normally closed contact) are provided in correspondence with the respective contacts 30, 34, 35. However, three or more may be provided. The number of corresponding terminal portions 31b, 32c, 33c may be greater or smaller than the number of contacts 30, 34, 35. Various shapes of the base block 1 as the base portion and the cover 4 as the cover portion can be adopted. While omitting the base block 1, the lower flange portion 20b of the winding frame 20 may be enlarged and used as a base portion. That is, the present invention is not limited to the electromagnetic relay according to the embodiment as long as the features and functions of the present invention can be realized.

  Next, a composite electromagnetic relay according to an embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a perspective view of the composite electromagnetic relay 100 according to the present embodiment as viewed from below, and FIG. 12 is a perspective view as viewed from above. In the following, for the sake of convenience, front and rear, left and right directions and up and down directions are defined as shown in the figure, and the configuration of each part will be described accordingly.

  As shown in FIGS. 11 and 12, the composite electromagnetic relay 100 includes a pair of relay structures 116 having a structure of independent relays, and the relay structures 116, and contact points 114 are alternately positioned on opposite sides. And a cover 118 that is disposed in the front-rear direction so as to be accommodated. In addition, the structure of each relay structure 116 is mutually equal. In FIG. 12, the cover 118 is omitted. As will be described later, the cover 118 is attached to the base of the winding frame 124, and the composite electromagnetic relay 100 does not have the base block 1 below the winding frame 124.

  13 is a longitudinal sectional view of the contact portion 114, and FIG. 14 is a sectional view taken along line IV-IV in FIG. Each relay structure 116 includes an electromagnet device 112, and the contact portion 114 is opened and closed by the operation of the electromagnet device 112. As shown in FIG. 13, the electromagnet device 112 of each relay structure 116 includes an electromagnet 120 and an armature 122 driven by the electromagnet 120.

  The electromagnet 120 has a winding frame 124 standing up and down, a coil 126 attached to the outer peripheral surface of the winding frame 124, and an iron core 128 inserted into the winding frame 124. The winding frame 124 is an electrically insulating resin molded product, and integrally includes a hollow body portion 124a and a pair of flange portions 124b and 124c provided at both upper and lower ends of the hollow body portion 124a.

  A pair of coil terminal portions 130 are fixed to the lower flange portion 124 c of the winding frame 124, and both ends of windings forming the coils 126 are connected to the coil terminal portions 130, respectively. The iron core 128 is a columnar member made of, for example, magnetic steel, and an upper end portion 128a thereof is disposed on the outer surface of the upper flange portion 124b of the winding frame 124. A lower end portion 128c of the iron core 128 protrudes from the lower flange portion 124c of the winding frame 124, and a yoke 132 that forms a magnetic path around the coil 126 is fixedly connected to the protruding portion by, for example, caulking.

  The yoke 132 is a rigid plate member having an L-shaped cross section formed of, for example, magnetic steel, and one flat plate portion 132a extends in the left-right direction along the flange portion 124c of the winding frame 124, and the other The flat plate portion 132b is spaced apart to the side of the coil 126 and extends vertically. A through hole 134 having a substantially convex contour is opened in a region away from the coil terminal portion 130 in the flange portion 124 c of the winding frame 124, and the flat plate portion 132 b of the yoke 132 is inserted into the through hole 134. Yes. The upper end portion 132c of the yoke 132 is positioned at substantially the same height as the upper end portion 128b of the iron core 128, and the armature 122 is swingably supported by the yoke 132 adjacent to the upper end portion 132c. Yes.

  The armature 122 is a flat plate-like rigid member formed of, for example, magnetic steel, and elastically relative to the yoke 132 via a movable contact spring member 142 provided in the contact portion 114 as shown in FIG. It is supported so as to be movable, and is disposed so as to face the upper end portion 128 a of the iron core 128. When the electromagnet 120 is activated, a magnetic circuit is formed between the iron core 128, the yoke 132 and the armature 122.

  The contact portion 114 of each relay structure 116 includes a first fixed terminal member 138, a movable spring member 142, and a second fixed terminal member 146. Each of these members 138, 142, and 146 is provided with a single lower fixed contact 136, a movable contact 140, and an upper fixed contact 144, respectively.

  As shown in FIG. 14, the first fixed terminal member 138 is punched into a predetermined shape from a conductive sheet metal material and bent into an L shape, and is substantially perpendicular to the horizontal flat plate portion 138a and the left end of the horizontal flat plate portion 138a. A vertical flat plate portion 138b extending downward and a terminal portion 138c extending in a pin shape from the lower end of the vertical flat plate portion 138b are integrally provided. A lower fixed contact 136 (make contact) made of a predetermined contact material bulges upward by, for example, caulking, and is attached to the horizontal flat plate portion 138a.

  The second fixed terminal member 146 is punched into a predetermined shape from a conductive sheet metal material and bent into an L shape, and extends downward at a substantially right angle from the right end of the horizontal flat plate portion 146a and the horizontal flat plate portion 146a. The vertical flat plate portion 146b and the terminal portion 146c extending in a pin shape from the lower end of the vertical flat plate portion 146b are integrally provided. An upper fixed contact 144 (break contact) made of a predetermined contact material bulges downward by, for example, caulking, and is attached to the horizontal flat plate portion 146a.

  Both the first fixed terminal member 138 and the second fixed terminal member 146 are fixedly attached to both flange portions 124 b and 124 c of the winding frame 124 of the electromagnet 120. Here, the vertical flat plate portion 146 b of the second fixed terminal member 146 is formed to be longer than the vertical flat plate portion 138 b of the first fixed terminal member 138. Accordingly, the lower fixed contact 136 and the upper fixed contact 144 are disposed to be opposed to each other in the vertical direction.

  The movable spring member 142 is made of a conductive thin plate member that is punched into a predetermined shape from a thin phosphor bronze spring plate and bent into an L shape, for example, and as shown in FIG. 13, a horizontal flat plate portion 142a and a horizontal flat plate portion. A horizontal extending portion 142b extending substantially in parallel to the rear with a step from 142a, a substantially right-angled elastic hinge portion 142c bent downward from the horizontal extending portion 142b, and extending downward from the elastic hinge portion 142c The vertical flat plate portion 142d and the terminal portion 142e extending in a pin shape from the lower end of the vertical flat plate portion 142d are integrally provided.

  The terminal portion 142e is inserted into the through hole 134 provided in the flange portion 124c of the winding frame 124 together with the flat plate portion 132b of the yoke 132, and extends below the flange portion 124c. A movable contact 140 made of a predetermined contact material bulges upward and downward by, for example, caulking to the horizontal flat plate portion 142a. Therefore, the movable contact 140 is disposed so as to be movable in the vertical direction between the lower fixed contact 136 and the upper fixed contact 144, and can contact both the fixed contacts 136 and 144 alternately.

  The armature 122 is fixed to the horizontal extension part 142b by caulking, for example, and the yoke 132 is fixed to the vertical flat plate part 142d by caulking, for example. The elastic hinge portion 142 c of the movable spring member 142 exerts a spring action between the armature 122 and the yoke 132 and biases the armature 122 in a direction away from the upper end surface of the iron core 128 (upward). As a result, the movable contact 140 abuts on the upper fixed contact 144 under a predetermined pressure, and is held stationary at a non-operating position (restoration position) separated from the lower fixed contact 136 by a predetermined distance.

  When an operating voltage is applied to the coil 22 of the electromagnet 120 from this state, the armature 122 is attracted to the upper end surface of the iron core 128 against the spring force of the movable spring member 142 by the magnetic attraction force, and the movable contact 140 is Move down. As a result, the movable contact 140 comes into contact with the lower fixed contact 136 under a predetermined pressure and is held stationary at the operating position.

  As shown in FIG. 11, the cover 118 has a substantially box shape with an open bottom and forms a receiving space 152 that houses the relay structure 116, front and rear side walls 148 a to 148 d, an upper wall 149, It has a partition wall 150 that divides the accommodation space 152 into left and right parts. The partition wall 150 is provided at a position that bisects the front and rear side walls 148a and 148b and the upper wall 149 in the left and right directions, and is perpendicular to the side walls 148a and 148b. It is extended. Such a cover 118 can be integrally molded from an electrically insulating material such as synthetic resin.

  A pair of relay structures 116 are accommodated in the left and right accommodation spaces 152 adjacent to each other in the reverse direction in the front-rear direction via the partition wall 150. In this state, the first fixed terminal member 138, the second fixed terminal member 146, the terminal portions 138c, 146c, 142e of the movable spring member 142, and the coil terminal portion 130 protrude downward from the bottom surface of the cover 118, respectively. At this time, the bottom surface of the cover 118 is closed by the flange portion 124c of the winding frame 124 of each relay structure 116, and an adhesive 154 is applied to cover the entire bottom surface of the flange portion 124c as shown in FIGS. Worn.

  The adhesive 154 seals all the gaps between the relay structure 116 and the cover 118 that are exposed to the outside of the cover 118, and connects the flange portions 124 c of the left and right reels 124, the cover 118, and the partition wall 150. Stick to each other. As a result, each relay structure 116 is disposed separately from each other in the left and right accommodation spaces 152 sealed from the outside. Therefore, the partition wall 150 ensures electrical insulation between the right and left relay structures 116, and the surface of the composite electromagnetic relay 100 can be cleaned.

  In addition, since the cover 118 is fixed to the flange portion 124c of the winding frame 124 of the both-relay structure 116 with an adhesive, the base block 1 is unnecessary, and the height direction dimension of the composite electromagnetic relay 100 is reduced. In addition, the number of parts and assembly man-hours can be reduced. Since each relay structure 116 is arranged in the opposite direction from each other, the terminal portions 138c, 146c, 142e and the coil terminal portion 130 of each relay structure 116 are arranged apart from each other. For this reason, it becomes easy to form a circuit pattern on the mounting substrate of the composite electromagnetic relay 100.

  By the way, in such a composite electromagnetic relay 100, a thermosetting adhesive that is cured by heating to a predetermined temperature (for example, 110 ° C.) is used as the adhesive 154. Therefore, after attaching the cover 118 to the flange portion 124c of the winding frame 124 and applying the adhesive 154, the composite electromagnetic relay 100 is heated, but the air in the accommodation space 152 expands during the heating, and the cover 118 There is a risk of deformation. Moreover, there is a possibility that bubbles are mixed into the adhesive 154 due to the expansion of air in the accommodation space 152 and the adhesive performance is deteriorated. Therefore, in the present embodiment, the cover 118 is formed as follows.

  FIG. 15A is a perspective view of the cover 118 according to the present embodiment as viewed from above, and FIG. 15B is a perspective view as viewed from below. Hereinafter, the left and right accommodation spaces 152 are represented by 152a and 152b, respectively. Through holes 200 are opened at the left and right ends of the upper wall 149 of the cover 118, and the left and right accommodation spaces 152 a and 152 b communicate with the outside through the through holes 200. Thereby, the expansion | swelling of the air in the accommodation space 152 at the time of the heating of the composite electromagnetic relay 100 can be prevented. As a result, deformation of the cover 118 can be prevented, and air bubbles can be prevented from being mixed into the adhesive 154. In consideration of the rigidity of the cover 118, the air permeability in the cover 118, and the like, the through hole 200 may be provided at any place, for example, at the corner of the cover 118 or the side walls 148a to 148d.

  The through hole 200 is for preventing the expansion of the air when the adhesive is cured, and is closed when the heating of the composite electromagnetic relay 100 is completed, whereby the composite electromagnetic relay 100 is completed. FIG. 16 is a cross-sectional view showing a procedure for closing the through hole 200. In the present embodiment, the through hole 200 is formed so as to be easily closed. That is, as shown in FIG. 6A, a recess 149a is formed on the upper surface of the upper wall 149, a projection 149b is formed at the center of the recess 149a, and a through hole 200 is opened at the center of the projection 149b. Has been.

  When closing the through-hole 200, first, the tip of the heating device 160 such as a soldering iron is brought into contact with the upper end of the protrusion 149b, and the protrusion 149b is thermally melted. As a result, as shown in FIG. 6B, the protrusion 149b is crushed and the through hole 200 is closed. Next, as shown in FIG. 6C, an adhesive 162 such as a UV adhesive is embedded over the entire recess 149a. Thus, after the through-hole 200 is thermally melted, by embedding the adhesive 162, the heat resistance in the through-hole portion is improved and sealing performance in a high-temperature use environment is improved as compared with the case where the hole is simply plugged with the adhesive 162. It can be secured.

  FIG. 17 is a diagram showing a modification of FIG. In FIG. 17, a single through hole 200 is provided on one of the left and right sides (left side in the figure) of the upper wall 149, and a substantially circular through hole 150 a is opened at the center of the dividing wall 150. Accordingly, the left accommodation space 152a communicates with the outside through the through hole 200, and the right accommodation space 152b communicates with the outside through the through hole 150a and the through hole 200. For this reason, thermal expansion of air in the accommodation space 152 during heating of the composite electromagnetic relay 100 can be prevented, and deformation of the cover 118 and mixing of bubbles into the adhesive 154 can be prevented. In FIG. 17, since the number of through holes 200 is one, the number of work steps for closing the through holes 200 can be reduced.

  In addition, as long as the through hole 150a is provided in the partition wall 150 in consideration of the electrical insulation of the left and right relay structure 116, the shape of the through hole 150a may be any shape. For example, as shown in FIG. 18A, a through hole 150b may be formed in a slit shape from the bottom surface of the partition wall 150. Thereby, the cover 118 having the through hole 150b can be easily formed. As shown in FIG. 18B, the bottom surface of the slit may be widened to form the through hole 150c. Accordingly, it is possible to prevent the adhesive 154 from accidentally closing the through hole 150c when attaching the cover, and to reliably communicate the accommodation spaces 152a and 152b.

  FIG. 19 is a diagram showing another modification of FIG. In FIG. 19, a single through hole 200 is opened at the center of the upper wall 149 where the upper wall 149 and the partition wall 150 intersect, and the partition wall 150 below the through hole 200 is connected to the through hole 200 and is slit. A through-hole 150d is formed. As a result, the left and right accommodation spaces 152a and 152b communicate with each other through the through hole 150d and the through hole 200. In this case, since the through hole 200 is provided in the central portion of the upper wall 149, the exhaust from the accommodation spaces 152a and 152b can be efficiently performed symmetrically. Moreover, since the through-hole 150d is provided in the partition wall 150 continuously with the through-hole 200, the cover 118 having the through-hole 200 and the through-hole 150d can be easily formed. Note that the through-hole 150d may be omitted if each of the accommodation spaces 152a, 152b can communicate with the outside through the through-hole 200 in the central portion of the upper wall.

  In the above embodiment, the inside of the cover 118 is divided into the left and right accommodation spaces 152a, 152b (first space, second space) by the partition wall 150 as a partition wall, but a pair of electromagnet devices 112 ( A pair of relay structures 116 (first electromagnetic relay main body, second electromagnetic) having a first electromagnet and a second electromagnet) and a pair of contact portions 114 (first contact portion and second contact portion). As long as each of the relay main bodies is sealed and accommodated, the shape of each of the accommodation spaces 152a and 152b is not limited to that described above. The accommodating space 152 in the cover 118 may be divided into three or more, and the relay structure 116 may be accommodated in each accommodating space 152. That is, the number of relay structures 116 of the composite electromagnetic relay 100 is not limited to two. You may make it attach the cover 118 to the base block 1 instead of the lower side collar part 124c of the winding frame 124 as a base part.

  In the above embodiment, a pair of through holes 200 provided in the upper wall 149 (FIG. 15) or a single through hole (cover through hole) 200 provided in the upper wall 149 and the partition wall 150 are provided. The accommodation spaces 152a and 152b are communicated with the outside through the formed through holes (divided wall through holes) 150a to 150d (FIGS. 17 to 19), but the communication means is not limited thereto. The shapes of the cover through hole and the partition wall through hole are not limited to those described above. Although the partition wall 150 is formed integrally with the cover 118, the partition wall 150 may be formed separately, or the partition wall 150 may be formed on the lower flange portion 124 c or the upper surface of the base block 1. That is, the present invention is not limited to the composite electromagnetic relay according to the embodiment as long as the features and functions of the present invention can be realized.

DESCRIPTION OF SYMBOLS 1 Base block 2 Electromagnet 3 Contact part 4 Cover 20 Winding frame 30 Movable contact 31 Movable terminal member 31b Terminal part 32 1st fixed terminal member 32a Front meal supply 32b Horizontal part 32c Terminal part 33 2nd fixed terminal member 33c Terminal part 34 Lower part fixation Contact 35 Upper fixed contact 50 Electromagnetic relay 100 Composite electromagnetic relay 114 Contact portion 116 Relay structure 118 Cover 120 Electromagnet 149 Upper wall 150 Partition wall 150a-150d Through hole 152a, 152b Storage space 200 Through hole

Claims (5)

A movable contact that is driven by the operation of the electromagnet;
In an electromagnetic relay provided with a fixed normally open contact and a fixed normally closed contact disposed to face the movable contact, with the movable contact being sandwiched therebetween,
The movable contact, the fixed normally open contact, and the fixed normally closed contact are contacted when the movable contact and the fixed normally open contact are in contact with each other, and when the movable contact and the fixed normally closed contact are in contact with each other. Sometimes, a plurality of currents are provided so that the current branches and flows between the contact points,
Normally fixed terminal open contact to be connected to the movable terminal and the fixed normally open contact connected to said movable contact, while each of Ru provided in plural corresponding to the plurality of the movable contact and a plurality of said stationary normally open contact, the The normally closed contact fixed terminal connected to the fixed normally closed contact is a single normally closed contact fixed terminal ,
The electromagnetic relay according to claim 1, wherein the plurality of movable contacts are respectively provided at the distal ends of movable spring members formed by branching the distal ends.   The electromagnetic relay according to claim 1,
  The movable relay, the normally open contact fixed terminal, and the normally closed contact fixed terminal are each formed with a wide tip end, and the electromagnetic relay is characterized in that:   The electromagnetic relay according to claim 1 or 2,
  The electromagnetic relay according to claim 1, wherein the plurality of fixed normally open contacts are provided separately from each other.   The electromagnetic relay according to any one of claims 1 to 3,
  The electromagnetic relay according to claim 1, wherein the distal ends of the movable terminal, the normally open contact fixed terminal, and the normally closed contact fixed terminal are bent substantially vertically.   The electromagnetic relay according to any one of claims 1 to 4,
  While supporting the electromagnet, the movable base, the normally open contact fixed terminal, and the normally closed contact fixed terminal, respectively, a resin base portion; and
  A resin cover portion attached to the base portion and surrounding the electromagnet;
  The electromagnet has a resin winding frame on which a coil is mounted,
  The winding frame, the base portion, and the cover portion are made of a liquid crystal polymer as a constituent material.

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