JP2016225150A - Contact device and electromagnetic relay employing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact device capable of attaining downsizing, and an electromagnetic relay employing the same.SOLUTION: A contact device 2 comprises a movable contactor 21, a first stationary terminal 22, a second stationary terminal 23 and a movable shaft 24. In the movable contactor 21, a movable contact 41 is provided. In the first stationary terminal 22, a stationary terminal 42 with which the movable contact 41 is brought into contact is provided. The second stationary terminal 23 is electrically connected to the movable contactor 21 via braided strands 43 and conducted with the first stationary terminal 22 via the movable contactor 21 in the state where the movable contact 41 is brought into contact with the stationary contact 42. The movable shaft 24 moves the movable contactor 21 in an action direction X that is a direction in which the movable contact 41 and the stationary contact 42 become opposite to each other, between a closing position where the movable contact 41 is brought into contact with the stationary contact 42, and an opening position where the movable contact 41 is separated from the stationary contact 42.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a contact device and an electromagnetic relay using the contact device, and more particularly to a contact device having a movable contact and a fixed contact and an electromagnetic relay using the contact device.

  Conventionally, a sealed contact device suitable for a power load relay, an electromagnetic switch or the like has been provided (see, for example, Patent Document 1). The sealed contact device described in Patent Literature 1 includes a sealed contact portion and a drive portion. The sealing contact portion is composed of a sealing container, a fixed terminal, a movable contact, a movable shaft, a fixed iron core, a movable iron core, and the like. The drive unit includes a coil, a coil frame, a yoke, and the like.

  The sealed container is formed in a box shape whose one surface is opened by a heat resistant material such as ceramic, and forms an airtight space together with the first joining member and the second joining member.

  The fixed terminal is formed into a bottomed cylindrical shape by, for example, a copper alloy, and a fixed contact is fixed to one end portion on the bottom side. The movable contact is formed, for example, in a flat plate shape using a copper alloy, and the movable contact is fixed to both ends facing the fixed contact.

  The movable shaft is formed in a substantially round bar shape from a nonmagnetic metal material such as stainless steel, for example, and a movable contact is attached to the distal end side of the movable shaft via a contact pressure spring.

  The fixed iron core is formed in a substantially cylindrical shape from a magnetic material such as electromagnetic soft iron, and has an insertion hole through which the movable shaft is inserted in the axial direction. The movable iron core is formed in a substantially cylindrical shape with a magnetic material such as electromagnetic soft iron, and is fixed to the rear end side of the movable shaft in a state where the movable shaft is inserted through an insertion hole provided in the axial direction. Further, the movable iron core is arranged in a state where a predetermined interval is provided between the movable iron core and the fixed iron core by the spring force of the return spring.

  The coil is wound around a coil frame. The yoke forms a magnetic circuit together with the fixed iron core, the movable iron core, and the first joining member.

  In this sealed contact device, when the coil is excited, the movable iron core is attracted to the fixed iron core and moved to drive the movable shaft fixed to the movable iron core, and each of the movable contactors attached to the movable shaft is driven. The movable contacts are in contact with the opposing fixed contacts. When the excitation of the coil is cut, the movable iron core is moved away from the fixed iron core by the spring force of the return spring, and each movable contact is separated from the fixed contact.

JP-A-10-162676

  In the sealed contact device described in Patent Document 1 described above, a part of the fixed terminal including the fixed contact and the movable contact are accommodated in the airtight space. In this airtight space, there are large spaces on both sides of the movable shaft, and a part of this space is used as a space for interrupting an arc generated between the movable contact and the fixed contact. That is, in this sealed contact device, since spaces that are only partially used are provided on both sides of the movable shaft, the entire device is enlarged accordingly.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a contact device that can be miniaturized and an electromagnetic relay using the contact device.

  A contact device according to a first aspect is configured to electrically connect a movable contact provided with a movable contact, a first fixed terminal provided with a fixed contact with which the movable contact contacts, and the movable contact via a conductor. A second fixed terminal connected to the first fixed terminal via the movable contact when the movable contact is in contact with the fixed contact; a closed position where the movable contact contacts the fixed contact; and A movable shaft that moves the movable contact in an operating direction that is a direction in which the movable contact and the fixed contact face each other between an open position where the movable contact is separated from the fixed contact; To do.

  The contact device of the second form is characterized in that, in the first form, the movable contact and the fixed contact are in contact with each other in at least two places when the movable contact is in the closed position.

  In the contact device of the third form, in the first or second form, the contact device that causes the movable contact to act on the movable contact with an elastic force that approaches the first fixed terminal when the movable contact is in the closed position. A pressure spring; and a holder for holding the movable contactor and the contact pressure spring. The holder is coupled to the movable shaft and moves in the operation direction together with the movable shaft. .

  In the contact device of the fourth form, in the first or second form, the contact that causes the movable contact to act on the movable contact in the state where the movable contact is in the closed position. A pressure spring; and a first sandwiching portion and a second sandwiching portion sandwiching the movable contact and the contact pressure spring from both sides in the operating direction, and sandwiching the movable contact with the contact pressure spring. A first sandwiching portion is provided on the movable shaft.

  The contact device of the fifth form is characterized in that, in the third form, the fixed contact, the movable contact, and the movable shaft are arranged in the operation direction.

  The contact device according to a sixth aspect is characterized in that, in the fifth aspect, the fixed contact and the movable contact are arranged on an axis of the movable shaft.

  The contact device according to a seventh aspect is the fifth or sixth aspect, wherein the movable contact is provided with the movable contact and is opposed to the first fixed terminal, and the holder together with the contact pressure spring. And a connecting portion that connects the contact portion and the holding portion.

  The contact device according to an eighth aspect is characterized in that, in the fourth aspect, the fixed contact, the movable contact, and the contact pressure spring are arranged in the operation direction.

  According to a ninth aspect of the present invention, in the eighth aspect, the movable shaft is aligned with the fixed contact, the movable contact, and the contact pressure spring in the operation direction.

  According to a tenth aspect of the present invention, in the ninth aspect, the fixed contact, the movable contact, and the contact pressure spring are arranged on the axis of the movable shaft.

  In an eleventh aspect of the contact device according to any of the eighth to tenth aspects, the movable contact is provided with the movable contact and is opposed to the first fixed terminal; It has a sandwiching part sandwiched between the first sandwiching part and the contact pressure spring, and a connecting part for connecting the contact part and the sandwiching part.

  In any of the first to eleventh forms, the contact device of the twelfth aspect further includes a container in which at least the movable contact and the fixed contact are accommodated.

  The electromagnetic relay according to a thirteenth aspect includes the contact device according to any one of the first to twelfth aspects, and an electromagnet device that drives the movable shaft.

  In the present invention, since there is one contact portion composed of a movable contact and a fixed contact, the space on the opposite side to the first fixed terminal with respect to the movable contact in the operation direction can be made one, and the contact portion is 2 There is an effect that the size of one space can be reduced as compared with the case where there is one.

It is a schematic sectional drawing which shows the electromagnetic relay which concerns on Embodiment 1 of this invention. 2A is a schematic cross-sectional view showing another electromagnetic relay according to Embodiment 1 of the present invention, and FIG. 2B is a partially broken perspective view showing a main part. 3A to 3H are schematic cross-sectional views showing variations of main parts of the contact device according to Embodiment 1 of the present invention. It is a schematic sectional drawing which shows the electromagnetic relay which concerns on Embodiment 2 of this invention. It is a schematic sectional drawing which shows another electromagnetic relay which concerns on Embodiment 2 of this invention. 6A is a schematic cross-sectional view showing still another electromagnetic relay according to Embodiment 2 of the present invention, and FIG. 6B is a partially omitted perspective view showing a main part. 7A to 7G are schematic cross-sectional views showing variations of main parts of the contact device according to Embodiment 2 of the present invention.

(Embodiment 1)
The contact device 2 according to Embodiment 1 of the present invention will be specifically described with reference to FIGS. 1 to 3H. However, the configuration described below is merely an example of the present invention, and the present invention is not limited to the following embodiment. Therefore, various modifications other than this embodiment can be made according to the design and the like as long as they do not depart from the technical idea of the present invention.

  In the present embodiment, as shown in FIG. 1, a case where the contact device 2 constitutes the electromagnetic relay 1 together with the electromagnet device 3 is illustrated. Moreover, in this embodiment, the electromagnetic relay 1 is mounted in an electric vehicle (EV), and the contact part 4 is electrically connected on the supply path of the DC power from the battery for traveling to a load (for example, an inverter). Illustrate.

  In the following description, the vertical and horizontal directions are defined in the direction shown in FIG. 1 unless otherwise specified. That is, the thickness direction of the movable contact 21 is the vertical direction, and the longitudinal direction of the movable contact 21 is the left-right direction. In addition, a direction perpendicular to both the thickness direction and the longitudinal direction of the movable contact 21 (a direction perpendicular to the paper surface of FIG. 1) is defined as the front-rear direction. However, these directions are not intended to limit the usage pattern of the contact device 2.

  As shown in FIG. 1, the electromagnetic relay 1 of this embodiment includes a contact device 2 and an electromagnet device 3.

  The contact device 2 includes a movable contact 21, a first fixed terminal 22, a second fixed terminal 23, and a movable shaft 24. The contact device 2 further includes a first case 25, a second case 26, a bottom plate 27, a contact pressure spring 28, and a holder 29.

  The first fixed terminal 22 is made of a conductive metal material such as a copper alloy, for example, and is formed in a cylindrical shape having a circular cross section in a plane perpendicular to the vertical direction. Further, in the present embodiment, the large-diameter portion 222 having a larger outer diameter than the small-diameter portion 221 on the lower side is formed into a T-shape when viewed from the front. Further, a fixed contact 42 is fixed to the tip (lower end) of the small diameter portion 221.

  Similarly to the first fixed terminal 22, the second fixed terminal 23 is formed in a cylindrical shape having a circular cross-section in a plane perpendicular to the vertical direction, using a conductive metal material such as a copper alloy. ing. In the present embodiment, as in the case of the first fixed terminal 22, the upper side is a large diameter part 232 having a larger outer diameter than the lower small diameter part 231. ing.

  The movable contactor 21 is formed in a rectangular flat plate shape that is long in the left-right direction by using a conductive metal material such as a copper alloy. A movable contact 41 is fixed to the right end of the upper surface of the movable contact 21. The movable contact 41 is disposed so as to face the fixed contact 42 in the assembled state of the contact device 2 (see FIG. 1).

  In the present embodiment, the movable contact 21 and the second fixed terminal 23 are electrically connected via a braided wire 43 (conductor). Therefore, when the movable contact 41 and the fixed contact 42 are brought into contact with each other, the first fixed terminal 22 and the second fixed terminal 23 are electrically connected via the movable contact 21. In addition, an insulating wall may be provided between the first fixed terminal 22 and the second fixed terminal 23 in the left-right direction.

  Here, the first fixed terminal 22 and the second fixed terminal 23 function as terminals for connecting an external circuit (battery and load). The movable contact 41 and the fixed contact 42 are in contact with each other by electrically connecting one of the battery and the load to the first fixed terminal 22 and electrically connecting the other of the battery and the load to the second fixed terminal 23. A supply path for DC power from the battery to the load is formed.

  The movable shaft 24 is formed of a nonmagnetic material in the shape of a round bar that is long in the vertical direction, and a male screw that is screwed into a female screw provided on the movable iron core 32 described later is provided at the lower end portion. A holder 29 described later is attached to the upper end of the movable shaft 24. Note that the movable shaft 24 and the holder 29 may be separate or integrated.

  The first case 25 is formed in a rectangular box shape whose upper surface is opened by an insulating material such as a synthetic resin, for example, and a through hole 251 penetrating in the vertical direction (thickness direction) is provided at the bottom of the first case 25. It has been.

  The second case 26 is formed in a rectangular box shape whose upper surface is opened by a metal material such as stainless steel (SUS304 or the like), for example, and a portion corresponding to the through hole 251 at the bottom of the second case 26 is arranged in the vertical direction. A penetrating through hole 261 is provided.

  Here, as shown in FIG. 1, the first case 25 is accommodated in the second case 26 such that each side portion and bottom portion are in contact with each side portion and bottom portion of the second case 26 from the inside. . Thereby, it is possible to prevent an arc generated between the movable contact 41 and the fixed contact 42 from contacting the side portion or the bottom portion of the second case 26. In the state where the first case 25 is housed in the second case 26, the through hole 251 and the through hole 261 are continuous in the vertical direction (see FIG. 1).

  The bottom plate 27 is formed in a rectangular flat plate shape that is long in the left-right direction using a heat-resistant material such as ceramic, for example, and two through holes 271 penetrating in the up-down direction are provided at intervals in the left-right direction.

  The small diameter portion 221 of the first fixed terminal 22 is inserted into the right through hole 271, and the lower surface of the large diameter portion 222 is joined to the upper surface of the bottom plate 27, thereby closing the right through hole 271. One fixed terminal 22 is fixed to the bottom plate 27.

  The left through-hole 271 is inserted into the small-diameter portion 231 of the second fixed terminal 23 and the lower surface of the large-diameter portion 232 is joined to the upper surface of the bottom plate 27 to block the left-side through-hole 271. Thus, the second fixed terminal 23 is fixed to the bottom plate 27.

  The bottom plate 27 has a lower surface joined to the upper surface of the second case 26 so as to close the upper surface opening of the second case 26, and stores the contact portion 4, the movable contact 21 and the like together with the second case 26. Form. The storage container 5 is preferably sealed in a closed space surrounded by the second case 26 and the bottom plate 27.

  The holder 29 is formed in a rectangular cylindrical shape having left and right sides opened by the front plate 291, the rear plate 292, the upper plate 293, and the lower plate 294 (see FIG. 2B), so that the movable contact 21 penetrates in the left-right direction. And combined with the movable contact 21. Further, the upper end of the movable shaft 24 is fixed to the lower surface of the lower plate 294 of the holder 29. That is, the holder 29 is configured to move in the vertical direction together with the movable shaft 24.

  The contact pressure spring 28 is formed in a coil shape, and is disposed between the upper surface of the lower plate 294 of the holder 29 and the lower surface of the movable contact 21 so that the central axis direction coincides with the vertical direction (see FIG. 1). That is, the contact pressure spring 28 is held by the holder 29 together with the movable contact 21, and applies an upward elastic force (direction approaching the first fixed terminal 22) to the movable contact 21.

  The electromagnet device 3 includes a fixed iron core 31, a movable iron core 32, a return spring 33, a bobbin 34, an excitation coil 35, a first yoke 36, and a second yoke 37.

  The fixed iron core 31 is formed in a substantially cylindrical shape by a magnetic material such as electromagnetic soft iron, for example, and a through hole 311 penetrating in the vertical direction is provided in the upper end portion. Further, a recess 312 having a larger inner diameter than the through hole 311 is provided at the lower end of the fixed iron core 31. That is, the fixed iron core 31 is provided with a through hole 311 through which the movable shaft 24 is inserted and a recess 312 in which the return spring 33 is accommodated in the vertical direction. The fixed iron core 31 is fixed to the second yoke 37 by joining the upper surface to the lower surface of the second yoke 37.

  Similar to the fixed iron core 31, the movable iron core 32 is formed in a substantially cylindrical shape by a magnetic material such as electromagnetic soft iron. The upper end portion of the movable core 32 is provided with a female screw along which the male screw provided at the lower end portion of the movable shaft 24 is screwed. The male screw of the movable shaft 24 is screwed into the female screw of the movable core 32. Thus, the movable iron core 32 is fixed to the movable shaft 24.

  The return spring 33 is formed in a coil shape, and is disposed between the fixed iron core 31 and the movable iron core 32 so that the central axis direction coincides with the vertical direction. The upper end of the return spring 33 is accommodated in the recess 312 of the fixed iron core 31. In this state, the movable iron core 32 is separated from the fixed iron core 31 by the spring force of the return spring 33 (see FIG. 1).

  The bobbin 34 includes, for example, a winding drum 341 that is formed in a cylindrical shape that is long in the vertical direction using an insulating material such as a synthetic resin, a circular upper collar 342 provided at the upper end of the winding drum 341, and a winding drum 341. And a circular lower collar portion 343 provided at the lower end of each of the two. A conducting wire is wound around the winding body 341 so that the central axis direction coincides with the vertical direction, and the exciting coil 35 is configured by this conducting wire. In addition, the fixed iron core 31, the return spring 33, and the movable iron core 32 are housed in the inner space of the winding drum portion 341 in this order from the upper side.

  The first yoke 36 is formed in a rectangular box shape whose upper surface is opened by a magnetic material such as electromagnetic soft iron, and houses the above-described fixed iron core 31, movable iron core 32, return spring 33, and bobbin 34. A second yoke 37 formed in a rectangular flat plate shape with a magnetic material such as electromagnetic soft iron is joined to the upper surface opening of the first yoke 36. The first yoke 36 and the second yoke 37 together with the fixed iron core 31 and the movable iron core 32 form a magnetic circuit through which the magnetic flux generated when the exciting coil 35 is energized passes.

  The second yoke 37 is provided with a through hole 371 that penetrates in the vertical direction and is continuous with the through hole 311 of the fixed iron core 31. That is, in the state where the contact device 2 and the electromagnet device 3 are assembled, as shown in FIG. 1, the through hole 251 of the first case 25, the through hole 261 of the second case 26, the through hole 371 of the second yoke 37, and The through-hole 311 of the fixed iron core 31 is continuous in the vertical direction. And the movable shaft 24 mentioned above is penetrated by these through-holes 251,261,371,311.

  By the way, in this embodiment, as shown in FIG. 1, the movable contact 41 and the fixed contact 42 are arranged so as to face each other in the vertical direction, but the movable shaft 24 is connected to the movable contact 41 and the fixed contact 42 in the vertical direction. It is not arranged to line up in the direction. In the present embodiment, the fixed contact 42 is provided only on the first fixed terminal 22, and no fixed contact is provided on the second fixed terminal 23.

  That is, in this embodiment, since only one contact portion 4 including the movable contact 41 and the fixed contact 42 is provided, the lower side of the movable contact 21 in the vertical direction (the side opposite to the first fixed terminal 22). There can be one space. Thereby, compared with the case where there are two contact portions, it is possible to reduce the size of one space, and it is possible to reduce the size of the contact device 2 and the electromagnetic relay 1 including the contact device 2.

  In addition, since the electromagnetic repulsive force generated between the contacts is reduced by using one contact portion 4 as in the present embodiment, the contact pressure spring 28 having a smaller spring constant than the case where there are two contact portions is provided. Can be adopted. Here, in the present embodiment, the direction in which the movable contact 41 and the fixed contact 42 face each other, that is, the vertical direction is the operation direction X.

  Next, operation | movement of the electromagnetic relay 1 provided with the contact device 2 and the electromagnet apparatus 3 mentioned above is demonstrated easily.

  When the exciting coil 35 is not energized (during non-energization), the movable iron core 32 is separated from the fixed iron core 31 by the spring force of the return spring 33 because no magnetic attractive force is generated between the movable iron core 32 and the fixed iron core 31. It is located at a position (position shown in FIG. 1). At this time, since the holder 29 is pulled down together with the movable shaft 24, the movable contact 21 is restricted from moving upward, and the movable contact 41 is located at an open position away from the fixed contact 42. . In this state, the contact portion 4 is in an open state, and the first fixed terminal 22 and the second fixed terminal 23 are not conductive.

  On the other hand, when the exciting coil 35 is energized, the movable iron core 32 is attracted upward against the spring force of the return spring 33 because the magnetic attractive force is generated between the movable iron core 32 and the fixed iron core 31, and comes into contact with the fixed iron core 31. Move to the position you want. At this time, since the holder 29 is pushed upward together with the movable shaft 24, the movable contact 21 is released from the upward movement restriction, and the movable contact 41 moves to a closed position where it contacts the fixed contact 42. In this state, the contact portion 4 is in a closed state, and the first fixed terminal 22 and the second fixed terminal 23 are conducted.

  As described above, the electromagnet device 3 controls the magnetic attractive force acting on the movable iron core 32 by switching the energization state of the exciting coil 35, and moves the movable iron core 32 in the vertical direction, thereby allowing the contact point of the contact device 2. A driving force for switching between the open state and the closed state of the unit 4 is generated.

  FIG. 2A is a schematic cross-sectional view showing another example of the electromagnetic relay 1 of the present embodiment. In FIG. 2A, the movable contact 41 and the fixed contact 42 are disposed on the axis P <b> 1 of the movable shaft 24.

  For example, in FIG. 1, when the movable shaft 24 and the holder 29 are moved to the right side and the fixed contact 42 is arranged on the axis P <b> 1 of the movable shaft 24, the upper plate 293 of the holder 29 is connected to the fixed contact 42. It will be arranged between the movable contact 41. Therefore, when the movable shaft 24 is moved upward, the upper plate 293 of the holder 29 and the fixed contact 42 come into contact with each other, and the movable contact 41 cannot be brought into contact with the fixed contact 42.

  Therefore, in FIG. 2A, the shape of the movable contact 21 so that the movable contact 41 can be brought into contact with the fixed contact 42 even when the fixed contact 42 is arranged on the axis P <b> 1 of the movable shaft 24. Has changed. Other configurations are the same as those in FIG. 1, and the same components are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 2A and 2B, the movable contactor 21 has a contact portion 211, a holding portion 212, and a connecting portion 213 each formed in a rectangular flat plate shape. The contact portion 211 has the movable contact 41 fixed to the upper surface, and is arranged so that the movable contact 41 faces the fixed contact 42 in the vertical direction. The holding part 212 is arrange | positioned in the state spaced apart between the contact parts 211 in the up-down direction. The connecting part 213 connects the left end of the contact part 211 and the left end of the holding part 212. That is, the movable contact 21 is formed so that the shape of the front view is C-shaped (see FIG. 2A).

  The movable contact 21 is held by the holder 29 when a holding portion 212 is sandwiched between the upper plate 293 of the holder 29 and the contact pressure spring 28. The contact portion 211 is arranged so that the upper plate 293 of the holder 29 is bypassed by the connecting portion 213 protruding upward from the holding portion 212 and the movable contact 41 faces the fixed contact 42 (see FIG. 2A). Accordingly, even when the fixed contact 42 is arranged on the axis P <b> 1 of the movable shaft 24, the movable contact 41 can be brought into contact with the fixed contact 42.

  Further, by configuring the movable contact 41 and the fixed contact 42 on the axis P1 of the movable shaft 24 as in the contact device 2, the movable contact 41 and the fixed contact 42 are stably in contact with each other. Can be made. Further, since it is possible to suppress the twisting of the movable contact 21 when the contact portion 4 (movable contact 41 and fixed contact 42) is opened and closed, contact pressure and arc extinguishing performance when the contact portion 4 is opened and closed can be reduced. It can be stabilized.

  Further, by configuring the movable contact 41 and the fixed contact 42 to be disposed on the axis P1 of the movable shaft 24, the storage container 5 can be further reduced, and the smaller contact device 2 and the electromagnetic relay 1 can be obtained. Can be realized.

  In FIG. 2A, the movable contact 41 and the fixed contact 42 are arranged on the axis P <b> 1 of the movable shaft 24. On the other hand, the movable contact 41, the fixed contact 42, and the movable shaft 24 may be arranged in the direction in which the movable contact 41 and the fixed contact 42 face each other, that is, in the operation direction X (vertical direction). Also in this case, since the torsion of the movable contact 21 when the contact portion 4 is opened and closed can be suppressed, the contact pressure and the arc extinguishing performance when the contact portion 4 is opened and closed can be stabilized.

  3A to 3H are schematic cross-sectional views showing variations of the movable contact 21 when the fixed contact 42 and the movable contact 41 are arranged on the axis P1 of the movable shaft 24. FIG.

  In FIG. 3A, the movable contact 21 has a contact portion 211 and a holding portion 212 arranged side by side in the vertical direction, and is integrally connected by a pair of connecting portions 213 from both the left and right sides, and the shape in front view is a square shape. It has become. That is, the movable contactor 21 is formed in a rectangular cylindrical shape whose front and rear surfaces are open.

  In FIG. 3B, the movable contact 21 has a contact portion 211 and a holding portion 212 arranged side by side in the vertical direction, and is integrally connected by a connection portion 213 formed in an L shape, and the shape in front view is S. It has a letter shape.

  In FIG. 3C, the movable contact 21 is formed so that the shape of the front view is C-shaped, like the movable contact 21 shown in FIG. 2A. However, in this case, only the holding portion 212 is disposed between the upper plate 293 and the lower plate 294 of the holder 29, and the contact pressure spring 28 is disposed between the upper plate 293 of the holder 29 and the contact portion 211. ing.

  In FIG. 3D, the movable contactor 21 is formed so as to have a quadrangular shape in front view, as in FIG. 3A. However, in this case, as in FIG. 3C, only the holding portion 212 is disposed between the upper plate 293 and the lower plate 294, and the contact pressure spring 28 is disposed between the upper plate 293 and the contact portion 211. ing.

  In FIG. 3E, in the movable contactor 21, the connecting portion 213 connected to the left end of the contact portion 211 protrudes downward, and the holding portion 212 connected to the lower end of the connecting portion 213 protrudes outward (leftward). On the other hand, the holder 29 is formed in a box shape whose upper surface and right surface are opened by the front plate 291, the rear plate 292, the lower plate 294 and the side plate 295.

  In this case, the contact pressure spring 28 is arranged between the contact portion 211 of the movable contact 21 and the lower plate 294 of the holder 29, and the upper surface of the holding portion 212 is in contact with the lower surface of the side plate 295. By doing so, upward movement is restricted.

  In FIG. 3F, the movable contact 21 has a pair of connecting portions 213 connected to the left and right ends of the contact portion 211 projecting downward, and a pair of holding portions 212 connected to the lower ends of the connecting portions 213 facing outward. Protruding. On the other hand, the holder 29 is formed in a box shape whose upper surface is opened by a front plate 291, a rear plate 292, a lower plate 294 and a pair of side plates 295.

  In this case, the contact pressure spring 28 is disposed between the contact part 211 of the movable contactor and the lower plate 294 of the holder 29, and the movable contactor 21 includes the lower surface of the side plate 295 corresponding to the upper surface of each holding part 212. The upward movement is restricted by touching.

  In FIG. 3G, the movable contact 21 has a connecting portion 213 connected to the left end of the contact portion 211 protruding downward, and a holding portion 212 connected to the lower end of the connecting portion 213 protruding inward (rightward). On the other hand, the holder 29 is formed in a box shape whose upper surface and right surface are opened by the front plate 291, the rear plate 292, the lower plate 294 and the side plate 295.

  In this case, the contact pressure spring 28 is arranged between the contact portion 211 of the movable contact 21 and the lower plate 294 of the holder 29, and the upper surface of the holding portion 212 is in contact with the lower surface of the side plate 295. By doing so, upward movement is restricted.

  In FIG. 3H, the movable contact 21 has a pair of connecting portions 213 connected to the left and right ends of the contact portion 211 protruding downward, and a pair of holding portions 212 connected to the lower ends of the connecting portions 213 facing inward. Protruding. On the other hand, the holder 29 is formed in a box shape whose upper surface is opened by a front plate 291, a rear plate 292, a lower plate 294 and a pair of side plates 295.

  In this case, the contact pressure spring 28 is disposed between the contact portion 211 of the movable contactor 21 and the lower plate 294 of the holder 29, and the movable contactor 21 is connected to the side plate 295 corresponding to the upper surface of each holding portion 212. The upward movement is restricted by contacting the lower surface.

  In the present embodiment, the movable contact 41 and the movable contact 21 are formed separately, and the fixed contact 42 and the first fixed terminal 22 are formed separately. However, they may be formed integrally. . Further, the braided wire 43 (conductor) that electrically connects the second fixed terminal 23 and the movable contact 21 may be electrically connected to the movable contact 21, and includes the contact portion 211, the holding portion 212, and the like. It may be connected to any of the connecting portions 213.

  Further, in the present embodiment, the contact portion 211, the holding portion 212, and the connecting portion 213 are formed separately, but may be integrally formed by, for example, extrusion molding. In addition, the conductor that electrically connects the second fixed terminal 23 and the movable contact 21 is not limited to the braided wire 43, but may be any conductor that can electrically connect both. Furthermore, the above-described connecting portion 213 may have a function of not only mechanically connecting the contact portion 211 and the holding portion 212 but also electrically connecting them.

  Moreover, although this embodiment demonstrated to the example the case where the closed space of the storage container 5 was sealed, the said closed space does not need to be sealed and is arc-extinguishing which contains hydrogen and is sealed. Gas etc. may be enclosed. Furthermore, in this embodiment, the movable contact 41 and the fixed contact 42 are in contact at one point on the surface. For example, the contact portion of the contact is divided into two forks, and is configured to contact at two points. Alternatively, a plurality of contacts (fixed contacts and movable contacts) may be provided.

  As described above, the contact device 2 of the present embodiment includes the movable contact 21, the first fixed terminal 22, the second fixed terminal 23, and the movable shaft 24. The movable contact 21 is provided with a movable contact 41. The first fixed terminal 22 is provided with a fixed contact 42 with which the movable contact 41 contacts. The second fixed terminal 23 is electrically connected to the movable contact 21 via a braided wire 43 (conductor). The second fixed terminal 23 is electrically connected to the first fixed terminal 22 through the movable contact 21 in a state where the movable contact 41 is in contact with the fixed contact 42. The movable shaft 24 is an operation direction in which the movable contact 41 and the fixed contact 42 face each other between a closed position where the movable contact 41 contacts the fixed contact 42 and an open position where the movable contact 41 separates from the fixed contact 42. The movable contact 21 is moved to X.

  Since the contact device 2 of the present embodiment has one contact portion 4 composed of the movable contact 41 and the fixed contact 42, the space on the opposite side of the movable contact 21 from the first fixed terminal 22 in the operation direction X is 1. Can be one. As a result, there is an advantage that the size of one space can be reduced as compared with the case where there are two contact portions.

  Moreover, it is preferable to further include a contact pressure spring 28 and a holder 29 as in the contact device 2 of the present embodiment. The contact pressure spring 28 exerts an elastic force on the movable contact 21 in a direction approaching the first fixed terminal 22 when the movable contact 21 is in the closed position. The holder 29 holds the movable contact 21 and the contact pressure spring 28. The holder 29 is coupled to the movable shaft 24 and moves in the operation direction X together with the movable shaft 24.

  The contact device 2 of the present embodiment can ensure the contact pressure between the movable contact 41 and the fixed contact 42 by the spring force of the contact pressure spring 28.

  Moreover, it is preferable that the fixed contact 42, the movable contact 41, and the movable shaft 24 are arranged in the operation direction X like the contact device 2 of this embodiment.

  In the contact device 2 of the present embodiment, since the fixed contact 42, the movable contact 41, and the movable shaft 24 are arranged in the operation direction X, the movable contact 41 and the fixed contact 42 can be stably contacted. Moreover, since the twist of the movable contact 21 at the time of opening / closing of the contact part 4 (the movable contact 41 and the fixed contact 42) can be suppressed, the contact pressure at the time of opening / closing the contact part 4 and the arc extinguishing performance can be reduced. It can be stabilized.

  Moreover, it is preferable that the fixed contact 42 and the movable contact 41 are disposed on the axis P <b> 1 of the movable shaft 24 as in the contact device 2 of the present embodiment.

  In the contact device 2 of the present embodiment, since the fixed contact 42 and the movable contact 41 are disposed on the axis P1 of the movable shaft 24, the movable contact 41 and the fixed contact 42 can be stably contacted. Moreover, since the twist of the movable contact 21 at the time of opening / closing of the contact part 4 (the movable contact 41 and the fixed contact 42) can be suppressed, the contact pressure at the time of opening / closing the contact part 4 and the arc extinguishing performance can be reduced. It can be stabilized.

  Moreover, it is preferable that the movable contactor 21 has the contact part 211, the holding | maintenance part 212, and the connection part 213 like the contact apparatus 2 of this embodiment. The contact portion 211 is provided with a movable contact 41 and faces the first fixed terminal 22. The holding portion 212 is held by the holder 29 together with the contact pressure spring 28. The connecting part 213 connects the contact part 211 and the holding part 212.

  In the contact device 2 of the present embodiment, the movable contact 41 provided in the contact portion 211 can be opposed to the fixed contact 42 by bypassing the holder 29 by the connecting portion 213. Thereby, even when the fixed contact 42 is disposed on the axis P <b> 1 of the movable shaft 24, the movable contact 41 and the fixed contact 42 can be brought into contact with each other.

  The electromagnetic relay 1 of this embodiment includes the above-described contact device 2 and an electromagnet device 3 that drives the movable shaft 24 of the contact device 2.

  Since the electromagnetic relay 1 of this embodiment is provided with the above-mentioned contact device 2, there exists an advantage that size reduction is possible.

(Embodiment 2)
A contact device 2 according to Embodiment 2 of the present invention will be specifically described with reference to FIGS. 4 to 7G.

  In the first embodiment, the so-called holder-type contact device 2 using the holder 29 that holds the movable contact 21 and the contact pressure spring 28 has been described. On the other hand, in the present embodiment, the movable contact 21 and the contact pressure spring 28 are formed by the first sandwiching portion 44 provided at the upper end of the movable shaft 24 and the second sandwiching portion including the bottom portion 260 of the second case 26. A so-called lift-off type contact device 2 that sandwiches the above will be described. However, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The contact device 2 of this embodiment includes a movable contact 21, a first fixed terminal 22, a second fixed terminal 23, and a movable shaft 24. The contact device 2 further includes a first case 25, a second case 26, a bottom plate 27, and a contact pressure spring 28.

  The movable contact 21 is formed in a rectangular flat plate shape that is long in the left-right direction, and a movable contact 41 is fixed to the right end on the upper surface. Further, a through hole 210 penetrating in the vertical direction is provided on the left end side of the movable contact 21.

  The movable shaft 24 is formed in a round bar shape that is long in the vertical direction, and a first sandwiching portion 44 formed in a disc shape is connected to the upper end. The movable shaft 24 is inserted into the through-hole 210 of the movable contact 21, and the movable contactor from the vertical direction (operation direction X) between the second sandwiched portion made of the bottom portion 260 of the second case 26 and the first sandwiched portion 44. 21 and the contact pressure spring 28 (see FIG. 4). At this time, the movable contact 21 is sandwiched between the first sandwiching portion 44 and the contact pressure spring 28 in the operation direction X, and is pushed upward by the spring force of the contact pressure spring 28.

  Next, operation | movement of the electromagnetic relay 1 provided with the contact device 2 and the electromagnet apparatus 3 mentioned above is demonstrated easily.

  When the exciting coil 35 is not energized (during non-energization), the movable iron core 32 is separated from the fixed iron core 31 by the spring force of the return spring 33 because no magnetic attractive force is generated between the movable iron core 32 and the fixed iron core 31. It is located at a position (position shown in FIG. 4). At this time, since the first sandwiching portion 44 is pulled down together with the movable shaft 24, the movable contact 21 is restricted from moving upward, and the movable contact 41 is in an open position away from the fixed contact 42. Located in. In this state, the contact portion 4 is in an open state, and the first fixed terminal 22 and the second fixed terminal 23 are not conductive.

  On the other hand, when the exciting coil 35 is energized, the movable iron core 32 is attracted upward against the spring force of the return spring 33 because the magnetic attractive force is generated between the movable iron core 32 and the fixed iron core 31, and comes into contact with the fixed iron core 31. Move to the position you want. At this time, since the first sandwiching portion 44 is pushed upward together with the movable shaft 24, the movement restriction of the movable contact 21 is released, and the movable contact 41 moves to a closed position where it contacts the fixed contact 42. .

  At this time, the movable shaft 24 moves further upward from the state in which the movable contact 41 is in contact with the fixed contact 42, so that the first sandwiching portion 44 connected to the upper end of the movable shaft 24 is separated from the movable contact 21. In this state, the contact pressure between the movable contact 41 and the fixed contact 42 is increased by the spring force of the contact pressure spring 28. Further, in this state, the contact portion 4 is in a closed state, and the first fixed terminal 22 and the second fixed terminal 23 are conducted.

  By the way, in this embodiment, since only one contact portion 4 including the movable contact 41 and the fixed contact 42 is provided, the lower side of the movable contact 21 in the vertical direction (the side opposite to the first fixed terminal 22). There can be one space. Thereby, compared with the case where there are two contact portions, it is possible to reduce the size of one space, and it is possible to reduce the size of the contact device 2 and the electromagnetic relay 1 including the contact device 2.

  In addition, since the electromagnetic repulsive force generated between the contacts is reduced by using one contact portion 4 as in the present embodiment, the contact pressure spring 28 having a smaller spring constant than the case where there are two contact portions is provided. Can be adopted.

  FIG. 5 is a schematic sectional view showing another example of the electromagnetic relay 1 of the present embodiment. In FIG. 5, the movable contact 41 and the fixed contact 42 are disposed on the central axis P <b> 2 of the contact pressure spring 28. In this case, the lower end of the contact pressure spring 28 is in contact with the upper surface of the bottom portion 250 of the first case 25, and the second sandwiching portion is configured by the bottom portion 250 of the first case 25. Other configurations are the same as those in FIG. 4, and the description thereof is omitted here.

  Thus, by disposing the movable contact 41 and the fixed contact 42 on the central axis P2 of the contact pressure spring 28, the movable contact 41 and the fixed contact 42 can be stably contacted. Further, when the movable contact 41 and the fixed contact 42 are brought into contact with each other, the contact pressure spring 28 can be used to suppress twisting and ensure a constant contact pressure. That is, the performance at the time of contact between the movable contact 41 and the fixed contact 42 can be stabilized.

  By the way, as shown in FIG. 5, when the movable shaft 24 and the contact pressure spring 28 are not on the same straight line, the movable contact 21 is twisted when the movable shaft 24 moves in the operating direction X (vertical direction). In order to avoid this, it is preferable to use the contact pressure spring 28 having a large spring constant.

  In addition, as shown in FIG. 5, it is preferable that the movable contact 41 and the fixed contact 42 be disposed on the central axis P <b> 2 of the contact pressure spring 28. The springs 28 may be arranged so as to be aligned in the operation direction X.

  FIG. 6A is a schematic cross-sectional view showing still another example of the electromagnetic relay 1 of the present embodiment. In FIG. 6A, the movable contact 41, the fixed contact 42, and the contact pressure spring 28 are configured to be disposed on the axis P <b> 1 of the movable shaft 24.

  For example, in FIG. 4, when the movable contact 24 and the contact pressure spring 28 are moved to the right side so that the fixed contact 42 is arranged on the axis P <b> 1 of the movable shaft 24, the first pinching portion 44 is fixed contact 42. And the movable contact 41. Therefore, when the movable shaft 24 is moved upward, the first sandwiching portion 44 and the fixed contact 42 come into contact with each other, and the movable contact 41 cannot be brought into contact with the fixed contact 42.

  Therefore, in FIG. 6A, even when the fixed contact 42 and the contact pressure spring 28 are arranged on the axis P1 of the movable shaft 24, the movable contact 41 can be brought into contact with the fixed contact 42. The shape of the movable contact 21 is changed. Other configurations are the same as those in FIG. 4, and the same components are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 6A and 6B, the movable contactor 21 has a contact portion 214, a sandwiched portion 215, and a connecting portion 216 each formed in a rectangular flat plate shape. The contact portion 214 has the movable contact 41 fixed to the upper surface, and is arranged so that the movable contact 41 faces the fixed contact 42 in the vertical direction. The sandwiched portion 215 is disposed in a state of being spaced from the contact portion 214 in the vertical direction. The connecting part 216 connects the left end of the contact part 214 and the left end of the sandwiched part 215. That is, the movable contact 21 is formed so that the shape of the front view is C-shaped (see FIG. 6A).

  The movable contactor 21 is held by being sandwiched between the first sandwiching portion 44 and the contact pressure spring 28 and sandwiching the portion 215. The contact portion 214 is disposed so that the first sandwiching portion 44 is bypassed by the connecting portion 216 protruding upward from the sandwiched portion 215, and the movable contact 41 faces the fixed contact 42 (see FIG. 6A). Thus, even when the fixed contact 42 and the contact pressure spring 28 are arranged on the axis P <b> 1 of the movable shaft 24, the movable contact 41 can be brought into contact with the fixed contact 42.

  Further, like the contact device 2, the movable contact 41, the fixed contact 42, and the contact pressure spring 28 are arranged on the axis P 1 of the movable shaft 24. Can be stably contacted. Furthermore, when the movable contact 41 and the fixed contact 42 are in contact with each other, the movable contact 21 can be prevented from being twisted by pushing the movable contact 21 by the contact pressure spring 28, and a constant contact pressure can be secured. it can. That is, the performance at the time of contact between the movable contact 41 and the fixed contact 42 can be stabilized.

  Further, by configuring the movable contact 41, the fixed contact 42, and the contact pressure spring 28 to be disposed on the axis P1 of the movable shaft 24, the storage container 5 can be further reduced, and a smaller contact device. 2 and the electromagnetic relay 1 can be realized.

  In FIG. 6A, the movable contact 41, the fixed contact 42, and the contact pressure spring 28 are arranged on the axis P1 of the movable shaft 24. On the other hand, the movable contact 41, the fixed contact 42, the movable shaft 24, and the contact pressure spring 28 are arranged in the direction in which the movable contact 41 and the fixed contact 42 face each other, that is, in the operation direction X (vertical direction). May be. In this case as well, the torsion of the movable contact 21 can be suppressed by pushing the movable contact 21 by the contact pressure spring 28. As a result, the performance at the time of contact between the movable contact 41 and the fixed contact 42 can be stabilized. Can do.

  7A to 7G are schematic cross-sectional views showing variations of the movable contact 21 when the fixed contact 42, the movable contact 41, and the contact pressure spring 28 are arranged on the axis P1 of the movable shaft 24. FIG. is there.

  In FIG. 7A, the movable contact 21 has a contact portion 214 and a sandwiched portion 215 arranged side by side in the vertical direction, and is integrally connected by a pair of connection portions 216 from both the left and right sides, and the shape in front view is a square shape. It has become. That is, the movable contactor 21 is formed in a rectangular cylindrical shape whose front and rear surfaces are open.

  In this case, the movable contact 21 is held by the sandwiched portion 215 sandwiched between the first sandwiched portion 44 connected to the upper end of the movable shaft 24 and the contact pressure spring 28 in the operation direction X (vertical direction). Is done.

  In FIG. 7B, the movable contactor 21 is formed in a rectangular flat plate-shaped contact portion 214, a pair of sandwiched portions 215 formed in a long rectangular bar shape in the front-rear direction, and a rectangular bar long in the vertical direction. It comprises a pair of connecting portions 216 that connect the contact portion 214 and each sandwiched portion 215.

  The movable contact 41 is fixed to the upper surface of the contact portion 214, and the connecting portions 216 are connected to the left and right ends of the lower surface of the contact portion 214 with the longitudinal direction being the vertical direction. Each sandwiched portion 215 is connected to a corresponding connecting portion 216 in a direction in which the longitudinal direction is the front-rear direction (the direction perpendicular to the paper surface of FIG. 7B). On the other hand, the first sandwiching portion 45 is formed to have an H shape when viewed from above, and is connected to the upper end of the movable shaft 24.

  In this case, the movable contact 21 is held by the pair of sandwiched portions 215 sandwiched between the first sandwiched portion 45 and the contact pressure spring 28 in the operation direction X (vertical direction).

  In FIG. 7C, the movable contact 21 is formed in a rectangular flat plate-shaped contact portion 214, a pair of sandwiched portions 215 formed in a rectangular bar shape that is long in the front-rear direction, and a rectangular bar shape that is long in the vertical direction. The contact portion 214 and the four connecting portions 216 that connect each sandwiched portion 215 are configured.

  The movable contact 41 is fixed to the upper surface of the contact portion 214, and four connecting portions 216 are connected to the four corners on the lower surface of the contact portion 214, with the longitudinal direction being the vertical direction. Each sandwiched portion 215 is connected to a pair of connecting portions 216 corresponding to each other in a direction in which the longitudinal direction is the front-rear direction (the direction perpendicular to the paper surface of FIG. 7B). On the other hand, the first sandwiching portion 46 is formed in a rectangular bar shape that is long in the left-right direction, and is connected to the upper end of the movable shaft 24.

  In this case, the movable contact 21 is held by the pair of sandwiched portions 215 sandwiched between the first sandwiched portion 45 and the contact pressure spring 28 in the operation direction X (vertical direction).

  In FIG. 7D, the movable contact 21 is formed in a rectangular flat plate-shaped contact portion 214, a pair of sandwiched portions 215 formed in a rectangular bar shape that is long in the left-right direction, and a rectangular flat plate-shaped contact portion 214. And a connecting portion 216 that connects each sandwiched portion 215.

  A movable contact 41 is fixed to the upper surface of the contact portion 214, and a connecting portion 216 is connected to the left end of the lower surface of the contact portion 214 in a direction in which the thickness direction is the left-right direction. Each sandwiched portion 215 is connected to both the lower end of the connecting portion 216 and both ends in the front-rear direction, with the longitudinal direction being the left-right direction. That is, a slit is formed between the pair of sandwiched portions 215. On the other hand, the first sandwiching portion 47 is formed in a rectangular flat plate shape and is connected to the upper end of the movable shaft 24.

  In this case, the movable contact 21 is configured such that the movable shaft 24 is passed through the slit between the pair of sandwiched portions 215, and between the first sandwiched portion 47 and the contact pressure spring 28 in the operation direction X (vertical direction). The pair of sandwiched portions 215 are held by being sandwiched.

  In FIG. 7E, the movable contact 21 has a contact portion 214 formed in a rectangular flat plate shape, a pair of sandwiched portions 215 formed in a rectangular bar shape long in the front-rear direction, and a contact portion 214 formed in a rectangular flat plate shape. And a pair of connecting portions 216 that connect each sandwiched portion 215 with each other.

  The movable contact 41 is fixed to the upper surface of the contact portion 214, and a pair of connecting portions 216 are connected to the left and right ends of the lower surface of the contact portion 214 with the thickness direction being the left-right direction. Each sandwiched portion 215 is connected to the lower end of the corresponding connecting portion 216 in a direction in which the longitudinal direction is the front-rear direction. A slit is formed between the pair of sandwiched portions 215 so that the movable shaft 24 can be inserted. On the other hand, the first sandwiching portion 47 is formed in a rectangular flat plate shape and is connected to the upper end of the movable shaft 24.

  In this case, the movable contact 21 is configured such that the movable shaft 24 is passed through the slit between the pair of sandwiched portions 215, and between the first sandwiched portion 47 and the contact pressure spring 28 in the operation direction X (vertical direction). The pair of sandwiched portions 215 are held by being sandwiched.

  In FIG. 7F, the movable contactor 21 includes a contact part 214 and a sandwiched part 215 each formed in a rectangular flat plate shape, and a connecting part 216 that couples the contact part 214 and the sandwiched part 215.

  The contact portion 214 has the movable contact 41 fixed to the upper surface, and is disposed so as to face the first fixed terminal 22. The sandwiched portion 215 is disposed at a distance from the contact portion 214 in the vertical direction. The connecting portion 216 is formed in an L shape, and connects the contact portion 214 and the sandwiched portion 215. As a result, the movable contactor 21 has a Z-shape when viewed from the front.

  In this case, the movable contact 21 is held by being sandwiched between the first sandwiching portion 44 and the contact pressure spring 28 in the operating direction X (vertical direction).

  In FIG. 7G, the movable contact 21 includes a contact portion 214 formed in a rectangular flat plate shape, a pair of sandwiched portions 215 formed in a rectangular bar shape that is long in the left-right direction, a contact portion 214, and each sandwiched portion 215. It is comprised with the connection part 216 which connects.

  The contact portion 214 has the movable contact 41 fixed to the upper surface, and is disposed so as to face the first fixed terminal 22. The pair of sandwiched portions 215 are arranged to be aligned in the front-rear direction with the longitudinal direction being the left-right direction. That is, a slit is formed between the pair of sandwiched portions 215. And the contact part 214 and each clamping part 215 are integrally connected by the connection part 216 by which the shape of the front view was formed in L shape, and the shape of the front view has become Z shape.

  In this case, the movable contact 21 is configured such that the movable shaft 24 is passed through the slit between the pair of sandwiched portions 215, and between the first sandwiched portion 47 and the contact pressure spring 28 in the operation direction X (vertical direction). The pair of sandwiched portions 215 are held by being sandwiched.

  In the present embodiment, the first sandwiching portions 44 to 47 and the movable shaft 24 are formed separately, but may be formed integrally.

  By the way, it is preferable to further include the contact pressure spring 28, the first sandwiching portion 44, and the second sandwiching portion (the bottom portion 260 of the second case 26) as in the contact device 2 of the present embodiment. The contact pressure spring 28 exerts an elastic force on the movable contact 21 in a direction approaching the first fixed terminal 22 when the movable contact 21 is in the closed position. The first sandwiching portion 44 and the second sandwiching portion sandwich the movable contact 21 and the contact pressure spring 28 from both sides in the operation direction X. The first sandwiching portion 44 is provided on the movable shaft 24 and sandwiches the movable contact 21 with the contact pressure spring 28.

  The contact device 2 of the present embodiment can ensure the contact pressure between the movable contact 41 and the fixed contact 42 by the spring force of the contact pressure spring 28.

  Moreover, it is preferable that the fixed contact 42, the movable contact 41, and the contact pressure spring 28 are arranged in the operation direction X like the contact device 2 of this embodiment.

  In the contact device 2 of the present embodiment, since the fixed contact 42, the movable contact 41, and the contact pressure spring 28 are arranged in the operation direction X, the movable contact 41 and the fixed contact 42 can be stably contacted. In addition, when the movable contact 41 and the fixed contact 42 are in contact with each other, the movable contact 21 can be suppressed by pushing the movable contact 21 with the contact pressure spring 28, and a constant contact pressure can be secured. it can. That is, the performance at the time of contact between the movable contact 41 and the fixed contact 42 can be stabilized.

  Further, like the contact device 2 of the present embodiment, the movable shaft 24 is preferably aligned with the fixed contact 42, the movable contact 41, and the contact pressure spring 28 in the operation direction X.

  In the contact device 2 of the present embodiment, since the fixed contact 42, the movable contact 41, the movable shaft 24, and the contact pressure spring 28 are arranged in the operation direction X, the movable contact 41 and the fixed contact 42 are stably brought into contact with each other. be able to. In addition, when the movable contact 41 and the fixed contact 42 are in contact with each other, the movable contact 21 can be suppressed by pushing the movable contact 21 with the contact pressure spring 28, and a constant contact pressure can be secured. it can. That is, the performance at the time of contact between the movable contact 41 and the fixed contact 42 can be stabilized.

  Moreover, it is preferable that the fixed contact 42, the movable contact 41, and the contact pressure spring 28 are disposed on the axis P1 of the movable shaft 24 as in the contact device 2 of the present embodiment.

  In the contact device 2 of the present embodiment, since the fixed contact 42, the movable contact 41, and the contact pressure spring 28 are disposed on the axis P1 of the movable shaft 24, the movable contact 41 and the fixed contact 42 are more stably connected. Can be contacted. In addition, when the movable contact 41 and the fixed contact 42 are in contact with each other, the movable contact 21 can be further prevented from being twisted by pushing the movable contact 21 by the contact pressure spring 28, and a constant contact pressure can be secured. Can do. That is, the performance at the time of contact between the movable contact 41 and the fixed contact 42 can be further stabilized.

  Further, like the contact device 2 of the present embodiment, the movable contactor 21 preferably has a contact part 214, a sandwiched part 215, and a connecting part 216. The contact portion 214 is provided with the movable contact 41 and faces the first fixed terminal 22. The sandwiched portion 215 is sandwiched together with the contact pressure spring 28 between the first sandwiched portion 44 and the second sandwiched portion. The connecting portion 216 connects the contact portion 214 and the sandwiched portion 215.

  In the contact device 2 of the present embodiment, the movable contact 41 provided on the contact portion 214 can be opposed to the fixed contact 42 by bypassing the first sandwiching portion 44 by the connecting portion 216. Thereby, even when the movable contact 41, the fixed contact 42, and the contact pressure spring 28 are disposed on the axis P1 of the movable shaft 24, the movable contact 41 and the fixed contact 42 can be brought into contact with each other.

1 Electromagnetic Relay 2 Contact Device 3 Electromagnet Device 21 Movable Contact 22 First Fixed Terminal 23 Second Fixed Terminal 24 Movable Shaft 26 Second Case 28 Contact Pressure Spring 29 Holder 41 Movable Contact 42 Fixed Contact 43 Knitting Wire (Conductor)
44 1st clamping part 211,214 Contact part 212 Holding | maintenance part 213,216 Connection part 215 Clamping part 260 Bottom part (2nd clamping part)
X Operating direction

Claims (13)

A movable contact provided with a movable contact;
A first fixed terminal provided with a fixed contact with which the movable contact contacts;
A second fixed terminal that is electrically connected to the movable contact through a conductor, and is electrically connected to the first fixed terminal through the movable contact in a state where the movable contact is in contact with the fixed contact;
Between the closed position where the movable contact contacts the fixed contact and the open position where the movable contact moves away from the fixed contact, the movable contact in an operating direction which is a direction in which the movable contact and the fixed contact face each other. A contact device comprising a movable shaft for moving the device.   The contact device according to claim 1, wherein the movable contact and the fixed contact are in contact with each other in at least two places when the movable contact is in the closed position. A contact pressure spring that acts on the movable contact with an elastic force in a direction approaching the first fixed terminal in a state where the movable contact is in the closed position;
A holder for holding the movable contact and the contact pressure spring;
3. The contact device according to claim 1, wherein the holder is coupled to the movable shaft and moves in the operation direction together with the movable shaft. A contact pressure spring that acts on the movable contact with an elastic force in a direction approaching the first fixed terminal in a state where the movable contact is in the closed position;
A first sandwiching portion and a second sandwiching portion that sandwich the movable contact and the contact pressure spring from both sides in the operation direction;
The contact device according to claim 1, wherein the first pinching portion that sandwiches the movable contact with the contact pressure spring is provided on the movable shaft.   The contact device according to claim 3, wherein the fixed contact, the movable contact, and the movable shaft are arranged in the operation direction.   The contact device according to claim 5, wherein the fixed contact and the movable contact are disposed on an axis of the movable shaft.   The movable contactor connects the contact portion provided with the movable contact and facing the first fixed terminal, a holding portion held by the holder together with the contact pressure spring, and the contact portion and the holding portion. The contact device according to claim 5, further comprising a connecting portion.   The contact device according to claim 4, wherein the fixed contact, the movable contact, and the contact pressure spring are arranged in the operation direction.   The contact device according to claim 8, wherein the movable shaft is aligned with the fixed contact, the movable contact, and the contact pressure spring in the operation direction.   The contact device according to claim 9, wherein the fixed contact, the movable contact, and the contact pressure spring are arranged on an axis of the movable shaft.   The movable contact includes a contact portion provided with the movable contact and facing the first fixed terminal, a sandwiched portion sandwiched between the first sandwiching portion and the contact pressure spring, and the contact portion. The contact device according to claim 8, further comprising a connecting portion that connects the sandwiched portion.   The contact device according to claim 1, further comprising a container in which at least the movable contact and the fixed contact are stored.   An electromagnetic relay comprising the contact device according to claim 1 and an electromagnet device that drives the movable shaft.

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