JP6299214B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay including a slide switch used for operation confirmation, for example.

  As an electromagnetic relay provided with a conventional switch for operation confirmation, there is one described in Patent Document 1 (Japanese Patent Laid-Open No. 11-96875). The electromagnetic relay includes a turning lever disposed on the upper surface of the casing, and a lever arm disposed inside the casing and integrally formed with the turning lever. Then, the contact is opened and closed via the lever arm by rotating the turning lever in a direction perpendicular to the upper surface of the casing.

JP-A-11-96875

  However, in the electromagnetic relay, foreign matter may enter the casing from a slit provided for confirming the operation of the swivel lever in the casing, resulting in contact failure or malfunction, and the operation cannot be confirmed. There was a problem.

  In view of the above-described problems, an object of the present invention is to provide an electromagnetic relay including a slide switch that can prevent foreign matter from entering a casing and prevent occurrence of contact failure or operation failure.

  In order to solve the above problems, an electromagnetic relay according to the present invention is an electromagnetic relay comprising a case and a contact mechanism housed in the case, and includes a cover attached to one surface of the case, And a slide lever that is slidable through an operation hole provided in the cover, and is housed in the cover and intersects one surface of the case according to a slide operation of the slide lever. An elastic test button that operates, and includes a slide switch that opens and closes the contact of the contact mechanism in conjunction with the operation of the elastic test button according to the slide operation of the slide lever, and the slide lever includes the operation The elastic test button presses the slide lever against the ceiling surface of the cover. It is characterized in that it is biased to so that.

  According to the present invention, the slide lever has a planar shape that closes the operation hole, and the elastic test button urges the slide lever so as to press the slide lever against the ceiling surface of the cover. For this reason, the clearance gap between a slide lever and a cover can be closed reliably, and the penetration | invasion of the foreign material to the inside of a cover can be prevented.

  As an embodiment of the present invention, the elastic test button includes a protrusion for operating an internal drive component for opening and closing the contact, and an elastic arm for biasing the slide lever. Also good.

  According to this embodiment, since the elastic test button has the elastic arm portion, it is not necessary to separately provide an elastic member for biasing the slide lever, and the manufacturing cost can be reduced.

  As an embodiment of the present invention, the slide switch is formed on the inner surface of the cover so that the elastic lock claw that extends along the slide operation direction from the slide lever engages with the elastic lock claw. A lock mechanism having a pair of grooves that hold the slide lever at the operating position and the return position may be provided, and the slide lever may be held at the operation position and the return position.

  According to this embodiment, since the lock mechanism having the elastic lock claw and the pair of grooves is provided, the slide lever can be held at the operating position and the return position while ensuring the biasing force of the elastic test button against the slide lever. .

  As an embodiment of the present invention, an erroneous operation prevention wall for preventing an erroneous operation of the slide lever may be provided so as to protrude from at least one side edge portion of the operation hole of the cover.

  According to the present embodiment, the erroneous operation prevention wall can prevent unintentional contact with the slide lever, thereby preventing an erroneous operation of the slide switch.

  As an embodiment of the present invention, the slide lever may have a slide support portion protruding toward the case.

  According to the present embodiment, the operation hole can be reliably closed with the slide lever by the slide support portion. Therefore, it is possible to reliably prevent foreign matter such as dust from entering the cover.

It is a perspective view which shows the electromagnetic relay of one Embodiment of this invention. It is a perspective view which shows the state which removed the cover of the electromagnetic relay of FIG. FIG. 3 is a III-III longitudinal sectional view (FIG. A) and an IX-IX transverse sectional view (FIG. B) showing a state in which the slide lever of the electromagnetic relay of FIG. 1 is located at a return position. It is the longitudinal cross-sectional view (FIG. A) and XX cross-sectional view (FIG. B) which show the state which the slide lever of the electromagnetic relay of FIG. 3 is located in the operation position. It is a disassembled perspective view of the electromagnetic relay of FIG. It is the disassembled perspective view seen from the angle different from FIG. It is a perspective view which shows the cover of the electromagnetic relay of FIG. It is a top view which shows the inside of the cover of FIG. It is the perspective view, front view, and side view which show the elasticity test button of the electromagnetic relay of FIG. It is the perspective view, front view, and side view which show the other example of the elastic test button of the electromagnetic relay of FIG. It is the perspective view, front view, and side view which show another example of the elastic test button of the electromagnetic relay of FIG. It is the perspective view, front view, and side view which show the example from which the elasticity test button of the electromagnetic relay of FIG. 1 differs.

  Hereinafter, an electromagnetic relay provided with a slide switch of the present invention will be described in detail according to an embodiment shown in the drawings.

  As shown in FIGS. 1 to 6, the electromagnetic relay 1 of the present embodiment includes a base plate 10, a coil block 20 attached on the base plate 10, a contact mechanism 30, a card 50, and a case 40. A slide switch 2 is mounted on the top. The coil block 20, the contact mechanism 30, and the card 50 are housed in the case 40.

  As shown in FIGS. 5 and 6, the base plate 10 is a planar rectangular shape and is made of an insulating resin material. As shown in FIGS. 3 and 4, the base plate 10 includes a first region 11 for attaching the coil block 20 partitioned by the insulating wall 13 and a second region 12 for attaching the contact mechanism 30. Have. As shown in FIGS. 5 and 6, case mounting projections 14 are formed on both side surfaces of the insulating wall 13 (FIGS. 5 and 6 show only one case mounting projection 14. ). A card mounting hole 18 for mounting a card 50 described later is formed on the upper side of the case mounting protrusion 14.

  Terminal holes 15 a and 15 a for assembling the pair of coil terminals 21 and 21 of the coil block 20 are formed on the bottom surface of the first region 11 of the base plate 10.

  Further, on the bottom surface of the second region 12 of the base plate 10, terminal holes 17a, 17b, 17c for assembling a movable contact terminal 31 and first and second fixed contact terminals 32, 33 of a contact mechanism 30 to be described later, Insulating portions 16 and 16 for fixing the first and second fixed contact terminals 32 and 33 of the mechanism 30 are formed. A movable contact terminal 31 is assembled between the insulating portions 16 and 16.

  As shown in FIGS. 3 and 4, the coil block 20 is inserted into the pair of coil terminals 21 and 21, a spool 22 having a through hole 24, a coil 23 wound around the spool 22, and the through hole 24. And a substantially L-shaped yoke 26 fixed to the lower end of the iron core 25 by caulking. The coil terminals 21, 21 are arranged so as to protrude from the bottom surface of the base plate 10, and are fixed to a flange portion 22 a provided at the lower end of the spool 22. The yoke 26 includes a horizontal portion 26 a that is caulked and fixed to the lower end of the iron core 25, and a vertical surface portion 26 b that extends upward along the coil 23. A hinge spring 27 is caulked and fixed to the upper end of the side surface of the vertical surface portion 26b.

  As shown in FIGS. 3 and 4, the contact mechanism 30 includes a movable contact piece 31a and first and second fixed contact pieces 32a and 33a disposed on both sides of the movable contact piece 31a. .

  The movable contact piece 31a has a movable contact 31b formed at the upper end and a movable contact terminal 31 formed at the lower end and bent in a crank shape. The movable contact 31b is integrated with the movable contact piece 31a so that the movable contact piece 31a is located at the center. The first fixed contact piece 32a includes a first fixed contact 32b that is caulked and fixed at the upper end, and a first fixed contact terminal 32 that is formed at the lower end. The second fixed contact piece 33a has a plate shape with an opening 33c formed therein, and a second fixed contact 33b that is caulked and fixed at the upper end, and a second fixed contact terminal that is formed at the lower end and is bent in a crank shape. 33. The movable contact terminal 31 and the first and second fixed contact terminals 32 and 33 are arranged so as to protrude from the bottom surface of the base plate 10.

  As shown in FIGS. 3 and 4, a card 50 and a movable iron piece 60 as an example of an internal drive component are disposed between the coil block 20 and the contact mechanism 30.

  The card 50 has a card main body 51 and a pressing protrusion 52 formed at the center of one surface of the card main body 51, and the tip of the pressing protrusion 52 is an opening 33c of the second fixed contact piece 33a. It is arrange | positioned so that it may penetrate. A press receiving portion 53 for connecting the card 50 and the movable iron piece 60 is formed on the back surface of the card body 51 in which the pressing protrusion 52 is formed.

  Further, as shown in FIGS. 5 and 6, the card body 51 is formed with a pair of elastic pieces 54, 54 at one end. The pair of elastic pieces 54, 54 are arranged at a predetermined interval, and have cylindrical card mounting projections 55, 55 on both side surfaces of the free end thereof. The card 50 is rotatably attached to the base plate 10 by fitting the card attachment protrusions 55 and 55 into the card attachment hole 18 of the base plate 10.

  The movable iron piece 60 is substantially L-shaped and includes a pressing portion 61 that is pressed by the elastic test button 90 of the slide switch 2 and a connecting arm portion 62 that is narrower than the pressing portion 61. The movable iron piece 60 is disposed so as to be rotatable about the upper end of the vertical surface portion 26b of the yoke 26, and the connecting arm portion 62 of the movable iron piece 60 and the press receiving portion 53 of the card 50 are in contact with each other. Has been placed. The movable iron piece 60 is supported by a hinge spring 27 attached to the vertical surface portion 26b of the yoke 26 so that the center of rotation does not shift.

  As shown in FIGS. 5 and 6, the case 40 has a box shape with one surface open and is made of a resin material having translucency. A case attachment hole 41 is formed at the center of the opening edge of the case 40. The case 40 is attached to the base plate 10 by fitting the case attachment protrusion 14 of the base plate 10 into the case attachment hole 41. A claw portion 42 is formed on the side end surface of the case 40 on the coil block 20 side. This nail | claw part 42 is for hooking a finger | toe at the time of removing, after attaching the electromagnetic relay 1 to the panel which is not shown in figure.

  As shown in FIG. 2, mounting grooves 43 and 43 for mounting the slide switch 2 are formed at the upper end of the side end surface of the case 40. On the upper surface of the case 40, a protrusion 44 and an operation hole 45 for arranging an elastic test button 90 described later are formed. The protrusion 44 is hollow, and the upper end of the card 50 is accommodated therein. The operation hole 45 is disposed on the pressing portion 61 of the movable iron piece 60. A support wall 46 for supporting the elastic test button 90 is formed at one outer edge of the operation hole 45.

  As shown in FIGS. 1 and 2, the slide switch 2 includes a cover 70 attached to the upper surface of the case 40, a slide lever 80 and an elastic test button 90 housed in the cover 70. The elastic test button 90 is inserted into the operation hole 45 of the case 40. The slide lever 80 is disposed on the elastic test button 90 so as to be slidable.

  As shown in FIG. 7, the cover 70 has an operation hole 71 for sliding the slide lever 80. A set of erroneous operation prevention walls 72 for preventing an erroneous operation of the slide lever 80 are provided along the slide operation direction D of the slide lever 80 at the edge of the operation hole 71. At both end surfaces in the longitudinal direction of the cover 70, mounting claws 73 and 73 are formed to fit the mounting grooves 43 and 43 of the case 40 and attach the cover 70 to the case 40. Further, as shown in FIG. 8, a pair of grooves, that is, a first groove 74 for holding the slide lever 80 in the return position, and an operating position are provided on the inner side surface 70 a that is the inner surface of the cover 70. The second groove portion 75 is formed. The first and second groove portions 74 and 75 and an elastic lock claw 82 of the slide lever 80 described later constitute a lock mechanism.

  As shown in FIG. 2, the slide lever 80 is integrally formed with a main body portion 81, an elastic lock claw 82, a slide support portion 84, and a pressing protrusion 85.

  The main body 81 has a plate shape, is larger than the operation hole 71 of the cover 70, and has a planar shape that closes the operation hole 71 regardless of the position of the slide lever 80.

  The elastic lock claw 82 has a planar R shape (see FIG. 5), and extends from the main body 81 along the slide operation direction D of the slide lever 80. By making the elastic lock claw 82 into a plane R shape, the stress applied to the joint portion between the main body portion 81 and the elastic lock claw 82 is dispersed while the elastic force is secured, and the life of the slide lever 80 is extended.

  The operation protrusion 83 has a substantially rectangular parallelepiped shape with a groove in the center, and is disposed on the upper surface of the main body 81. By providing the operation projection 83, the slide lever 80 can be easily slid. The central groove is provided in preparation for operation with a screwdriver or the like, and may have a structure without a groove.

  The slide support portion 84 has a substantially quadrangular prism shape, and protrudes from the lower surface of the main body portion 81 at substantially the center. The slide support portion 84 has a length substantially equal to the distance from the lower surface of the main body portion 81 in a state where the slide lever 80 is in pressure contact with the ceiling surface 70 b of the cover 70 to the upper surface of the case 40.

  The pressing protrusion 85 has a side trapezoidal shape, and protrudes from the lower surface of the end portion of the main body 81 on the elastic lock claw 82 side. A slope is formed on the side surface of the pressing protrusion 85 on the elastic lock claw 82 side, and the elastic test button 90 can be pressed in the vertical direction by sliding the slide lever 80.

  The return position of the slide lever 80 is the position of the slide lever 80 when the movable contact 31b of the contact mechanism 30 and the second fixed contact 33b are in contact as shown in FIG. The operating position of the slide lever 80 is the position of the slide lever 80 when the movable contact 31b of the contact mechanism 30 and the first fixed contact 32b are in contact with each other, as shown in FIG.

  As shown in FIG. 9, the elastic test button 90 has a substantially π-shaped cross section, a flat rectangular plate portion 91, and elastic arm portions 92 and 92 formed respectively at opposing corner portions of the flat plate portion 91. And a projecting portion 93 that protrudes from the flat plate portion 91 and is located between the elastic arm portions 92 and 92, and is integrally formed.

  Each of the elastic arm portions 92, 92 extends linearly from both corner portions of one side of the flat plate portion 91 so as to have an angle with respect to the flat plate portion 91 along a side perpendicular to the one side.

  The protrusion 93 has two elastic pieces 93a and 93a. A gap is formed between the elastic pieces 93a and 93a. Claw portions 93b and 93b for hooking on the inner edge portion of the operation hole 45 of the case 40 to prevent the elastic test button 90 from coming off are formed at the distal end portions of the elastic pieces 93a and 93a. Further, on the inward surfaces of the elastic pieces 93a, 93a, extrusion convex portions 93c, 93c are formed at positions that do not face each other. This protrusion for extrusion is used to push out the elastic test button 90 from the mold.

  Next, a method for assembling the electromagnetic relay 1 will be described. This electromagnetic relay 1 is assembled in the return state (a state in which the slide lever 80 is in the return position) shown in FIG.

  First, the coil block 20 is assembled in advance, the coil terminals 21 and 21 are press-fitted into the flange portion 22a of the spool 22, and the ends of the coil 23 are wound around the coil terminals 21 and 21, respectively.

  Then, the movable contact terminal 31 of the movable contact piece 31 a and the first and second fixed contact terminals 32 and 33 of the first and second fixed contact pieces 32 a and 33 a are press-fitted into the base plate 10 and protrude from the bottom surface of the base plate 10. . At this time, as shown in FIG. 3, the movable contact 31b and the second fixed contact 33b are in contact with each other, and the movable contact 31b and the first fixed contact 32b are opposed to each other so as to be able to contact and separate.

  Next, the card 50 is attached to the base plate 10. At this time, it attaches so that the front-end | tip of the pushing protrusion part 52 of the card | curd 50 may penetrate the opening part 33c of the 2nd fixed contact piece 33a.

  Subsequently, the coil block 20 is attached to the base plate 10, and the coil terminals 21 and 21 are projected from the bottom surface of the base plate 10. The movable iron piece 60 is arranged so as to be rotatable about the upper end of the vertical surface portion 26b of the yoke 26. At this time, the movable iron piece 60 is disposed so that the connecting arm portion 62 and the press receiving portion 53 of the card 50 are in contact with each other.

  In this state, the movable iron piece 60 is only in contact with the press receiving portion 53 of the card 50 and does not press the card 50 toward the contact mechanism 30 side.

  When the assembly of the coil block 20 and the contact mechanism 30 to the base plate 10 is completed, the case 40 is attached to the base plate 10. Then, the elastic test button 90 is inserted into the operation hole 45 of the case 40, the slide lever 80 is disposed on the case 40, and the elastic lock claw 82 of the slide lever 80 is located in the first groove portion 74 of the cover 70. In this manner, the cover 70 is attached.

  In this state, the elastic test button 90 urges the elastic lock claw 82 to press against the ceiling surface 70 b of the cover 70 by the elastic force of the elastic arm portion 92. Further, the slide lever 84 and the elastic test button 90 support the slide lever 80 so that the slide lever 80 can be maintained substantially parallel to the ceiling surface 70b of the cover 70 at all times. Therefore, when the slide lever 80 is in the return position, the gap between the slide lever 80 and the operation hole 71 of the cover 70 can be reliably closed.

  In addition, a slight gap is formed between the slide support portion 84 of the slide lever 80 and the upper surface of the case 40 in order to prevent generation of unnecessary resistance during the slide movement. Thereby, the slide operation of the slide lever 80 is facilitated.

  Next, the operation of the electromagnetic relay 1 when the slide lever 80 of the slide switch 2 is slid from the return position to the operating position will be described.

  When the slide lever 80 is slid from the return position to the operating position via the operation hole 71, the elastic lock pawl 82 is pushed out from the first groove portion 74 toward the second groove portion 75 as shown in FIGS. To slide. Then, the elastic test button 90 is pressed by the pressing protrusion 85 of the slide lever 80 and gradually pushed into the case 40.

  While the slide lever 80 is slid from the return position to the operating position, the slide lever 80 is urged by the elastic force of the elastic arm portion 92 of the elastic test button 90 and presses against the ceiling surface 70b of the cover 70. Yes.

  The force in the sliding operation direction D received by the elastic test button 90 by the pressing protrusion 85 is supported by the support wall 46 of the case 40. This prevents the elastic test button 90 from falling off the operating hole 45 due to the sliding operation of the slide lever 80, and allows the elastic test button 90 to move reliably in a direction perpendicular to the upper surface of the case 40. Yes.

  When the slide lever 80 is moved to the operating position, the elastic test button 90 pushed into the case 40 by the slide lever 80 presses the pressing portion 61 of the movable iron piece 60 toward the coil block 20. As a result, the pressing portion 61 of the movable iron piece 60 is pressed against the magnetic plate portion 25a of the iron core 25, and the connecting arm portion 62 pushes the card 50 toward the contact mechanism 30. As a result, the pushing protrusion 52 of the card 50 pushes the movable contact piece 31a toward the first fixed contact piece 32a, the movable contact piece 31a is elastically deformed, and the movable contact 31b and the first fixed contact 32b come into contact with each other. Thus, the operation state shown in FIG. 4 is obtained.

  When the slide lever 80 moves to the operating position, the elastic lock claw 82 of the slide lever 80 is engaged with the second groove 75, and the slide lever 80 is held at the operating position. As described above, the lock mechanism including the elastic lock claw 82 of the slide lever 80 and the first and second groove portions 74 and 75 secures the urging force of the elastic test button 90 against the slide lever 80, while the slide lever 80 can be held in the operating position and the return position.

  When the slide lever 80 is slid from the operating position to the return position, the pressure applied to the elastic test button 90 by the pressing protrusion 85 is released, and the elastic test button 90 returns to the return state shown in FIG. Thereby, the pressure with respect to the movable iron piece 60 of the elastic test button 90 is released, and the movable iron piece 60 returns to the return state by the elastic force of the hinge spring 27. When the movable iron piece 60 returns to the return state, the pressure of the movable iron piece 60 against the card 50 is released, and the movable contact 31b is changed from the operation state shown in FIG. 4 to the return state by the elastic force of the movable contact piece 31a. Return. At this time, the card 50 returns to the return state together with the movable contact 31b by the elastic force of the movable contact piece 31a. As described above, in the electronic relay 1, the contact of the contact mechanism 30 is opened and closed in conjunction with the operation of the elastic test button 90 in accordance with the slide operation of the slide lever 80.

  According to the electromagnetic relay 1, the slide lever 80 is disposed so as to block the operation hole 71 of the cover 70, and the elastic test button 90 is attached so as to press the slide lever 80 against the ceiling surface 70 b of the cover 70. It is fast. For this reason, the clearance gap between the slide lever 80 and the cover 70 can be blocked | closed reliably, and the penetration | invasion of the foreign material to the inside of the cover 70 can be prevented.

  The electromagnetic relay 1 is not limited to the contact mechanism 30 described above, and any contact mechanism can be used.

  In the electromagnetic relay 1, the card 50 and the movable iron piece 60 are used as internal drive components for opening and closing the contact of the contact mechanism 30, but the invention is not limited thereto. Any component can be adopted as long as the contact can be opened and closed in accordance with the slide operation of the slide lever 80.

  The slide switch 2 includes a lock mechanism having an elastic lock claw 82 formed on the slide lever 80 and first and second groove portions 74 and 75 formed on the cover 70, but is not limited thereto. Any mechanism can be adopted as long as the mechanism can hold the slide lever 80 in the operating position and the return position while securing the biasing force of the elastic test button 90 to the slide lever 80.

  The elastic test button that can be used for the slide switch 2 is not limited to the elastic test button 90 described above. For example, as shown in FIG. 10, an elastic test button 100 having linear elastic arm portions 102, 102 extending from opposing corners of the flat plate portion 91 along opposing sides may be used. Further, as shown in FIG. 11, an elastic test button 110 having a side V-shaped elastic arm portion 112 may be used. Furthermore, as shown in FIG. 12, an elastic test button 120 having elastic arm portions 122, 122 formed on opposite sides of the flat plate portion 91 and having substantially triangular side surfaces may be used.

  Further, the operation direction of the elastic test button 90 is not limited to the direction orthogonal to the upper surface of the case 40. If the contact of the contact mechanism can be opened and closed by the operation of the elastic test button, any operation direction intersecting with one surface of the case can be adopted.

  Although a set of erroneous operation prevention walls 72 protrudes along the slide operation direction D of the slide lever 80 at the edge of the operation hole 71 of the cover 70, the present invention is not limited thereto. The erroneous operation prevention wall only needs to be provided so as to protrude from at least one side edge of the operation hole.

  The electromagnetic relay 1 including the slide switch 2 according to the present invention is not limited to the above-described embodiment, and a slide lever arranged so as to close an operation hole formed in the cover, and the slide lever is pressed against the ceiling surface of the cover. There is no particular limitation as long as a slide switch having an elastic test button that is biased in this way is provided and foreign matter can be prevented from entering the slide switch.

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 2 Slide switch 10 Base plate 11 1st area | region 12 2nd area | region 13, 16 Insulating wall 14 Case attachment protrusion 15a, 15b, 17a, 17b, 17c Terminal hole 16 Card attachment hole 20 Coil block 21 Coil terminal 22 Spool 22a Flange portion 23 Coil 24 Through hole 25 Iron core 25a Magnetic plate portion 26 Yoke 26a Horizontal portion 26b Vertical surface portion 27 Hinge spring 30 Contact mechanism 31 Movable contact terminal 31a Movable contact piece 31b Movable contact 32 First fixed contact terminal 32a First fixed contact piece 32b First fixed contact 33 Second fixed contact terminal 33a Second fixed contact piece 33b Second fixed contact 33c Opening 40 Case 41 Case mounting hole 42 Claw 43 Mounting groove 44 Projection 45 Operation hole 46 Support wall 50 Card 51 Card body 52 Pushing Protrusion 53 Pressing Receiving Portion 54 Elastic Piece 55 Card mounting protrusion 60 Movable iron piece 61 Pressing portion 62 Connecting arm portion 70 Cover 70a Inner side surface 70b Ceiling surface 71 Operation hole 72 Misoperation preventing wall 73 Mounting claw 74 First groove portion 75 Second groove portion 80 Slide lever 81 Body portion 82 Elastic lock Claw 83 Operation projection 84 Slide support portion 85 Pressing projection 90, 100, 110, 120 Elastic test button 91 Flat plate portion 92, 102, 112, 122 Elastic arm portion 93 Protruding portion 93a Elastic piece 93b Claw portion 93c Extruding convex portion

Claims (4)

An electromagnetic relay comprising a case and a contact mechanism housed in the case,
A cover attached to one side of the case;
A slide lever housed in the cover and slidable through an operation hole provided in the cover;
An elastic test button housed in the cover and operating in a direction intersecting one surface of the case according to a sliding operation of the slide lever;
Have
A slide switch that opens and closes the contact of the contact mechanism in conjunction with the operation of the elastic test button according to the slide operation of the slide lever;
The slide lever has a planar shape that closes the operation hole, and the elastic test button urges the slide lever to press against the ceiling surface of the cover ,
The elastic test button, that has a protrusion for operating the internal drive components for opening and closing the contacts, and an elastic arm portion for biasing said slide lever, electric磁継collectors. The slide switch is
An elastic lock claw extending from the slide lever along a slide operation direction;
A pair of grooves formed on the inner surface of the cover so that the elastic lock claws engage, and holding the slide lever in an operating position and a return position;
A locking mechanism having
Said slide lever, Ru can be held to said return position and the operating position, the electromagnetic relay of claim 1. 3. The electromagnetic relay according to claim 1, wherein an erroneous operation preventing wall for preventing an erroneous operation of the slide lever is provided at least at one side edge of the operation hole of the cover. Said slide lever, toward the case that has a slide support portion which projects, the electromagnetic relay of any one of claims 1 to 3.

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