JP7022911B2 - Electromagnetic relay - Google Patents

Description

The present invention relates to an electromagnetic relay.

An electromagnetic relay is an electronic component that switches energization on and off by switching the contact and disconnection between a movable contact and a fixed contact housed in a cover. In recent years, electromagnetic relays are required to have a higher energization capacity.

Therefore, Patent Document 1 improves miniaturization, electrical conductivity, and insulation between the fixed terminal and the backstop by devising the shape of the backstop that abuts on the movable spring having the movable contact. The electromagnetic relay is disclosed.

Japanese Unexamined Patent Publication No. 2009-289678

According to the electromagnetic relay disclosed in Patent Document 1, up to a certain energization capacity can be supported. However, if the electromagnetic relay disclosed in Patent Document 1 is adopted in order to cope with a higher energization capacity, the fixed terminals and the like become large, and as a result, the entire electromagnetic relay also becomes large. In recent years, not only high energization capacity is required, but also miniaturization is required while avoiding deterioration of the performance of electromagnetic relays. Therefore, further improvement of the electromagnetic relay is desired.

Therefore, an object of the present invention is to provide an electromagnetic relay which is advantageous for achieving both high energization capacity and miniaturization.

The electromagnetic relay according to the aspect of the present invention includes an electromagnet device having a coil, a fixed terminal main body extending in the first direction, and a fixed terminal arm portion curved and continuous at the end of the fixed terminal main body. A movable spring having two fixed contacts, a fixed terminal having two fixed contacts, and two movable contacts extending in the second direction and moving by driving an electromagnet device, and a contact contact. A restricting portion provided so as to be able to abut on the surface opposite to the surface on the contact side, an arm portion provided with the restricting portion, and a leg portion curved to the contact contact side in the first direction from the arm portion. A backstop having a The other side of the fixed terminal body and the fixed terminal arm is the second side terminal part curved from the first end side of the first side terminal part to the side opposite to the second direction, and the leg part of the backstop is It is provided apart from the terminal portion on the first side on the side opposite to the second direction, and is provided between the two movable contacts when viewed from the first direction on the projection surface having the second direction as a perpendicular line. ..

According to the present invention, it is possible to provide an electromagnetic relay which is advantageous for achieving both high energization capacity and miniaturization.

It is a figure which shows the appearance of the electromagnetic relay which concerns on 1st Embodiment of this invention. It is a figure which shows the internal structure of the electromagnetic relay which concerns on 1st Embodiment of this invention. It is sectional drawing of the electromagnetic relay corresponding to the part AA of FIG. It is an exploded perspective view of the electromagnetic relay which concerns on 1st Embodiment of this invention. It is a side view which shows the internal structure of the electromagnetic relay which concerns on 1st Embodiment of this invention. It is a figure which shows the shape of the fixed terminal in 1st Embodiment of this invention. It is the figure which excluded the fixed terminal from the internal structure shown in FIG. It is a figure which shows the shape of the back stop in the 2nd Embodiment of this invention. It is a figure which shows the internal structure of the electromagnetic relay which concerns on 3rd Embodiment of this invention. It is a figure which shows the shape of the fixed terminal in 3rd Embodiment of this invention. It is the figure which excluded the fixed terminal from the internal structure shown in FIG. It is a figure which shows the internal structure of the electromagnetic relay which concerns on 4th Embodiment of this invention. It is a figure which shows the shape of the fixed terminal in 4th Embodiment of this invention. It is the figure which excluded the fixed terminal from the internal structure shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Further, in the following description, as an example, the first direction, the second direction, and the third direction are defined as follows. First, the first direction in which each connection terminal is extended is defined as the Z direction. The Z direction is a direction from the side exposed to the outside of the connection terminal toward the inside of the electromagnetic relay, and the side where the tip of the connection terminal is exposed to the outside is the lower side. Further, in the plane perpendicular to the Z direction, the X direction and the Y direction which are perpendicular to each other are defined. In particular, the second direction in which the movable spring 30b described below is extended is defined as the X direction. Then, the third direction that matches the row in which the two movable contacts 33 or the two fixed contacts 44 described below are lined up is defined as the Y direction.

(First Embodiment)
First, the electromagnetic relay according to the first embodiment will be described. FIG. 1 is a perspective view showing the appearance of the electromagnetic relay 1 according to the present embodiment. FIG. 2 is a perspective view showing the internal configuration of the electromagnetic relay 1 excluding the cover 10. FIG. 3 is a cross-sectional view of the electromagnetic relay 1 corresponding to the AA portion of FIG. Further, FIG. 4 is an exploded perspective view of the electromagnetic relay 1.

The electromagnetic relay 1 is an electronic component that is installed in various electronic devices and appropriately switches on / off of energization. The electromagnetic relay 1 includes a cover 10, an electromagnet device 12, a movable contact portion 13, a fixed contact portion 14, and a relay iron 15.

The cover 10 is made of resin, for example, and is a rectangular parallelepiped box body that houses each component such as an electromagnet device 12 and has a top wall 10a and a side wall 10b surrounding the top wall 10a. Further, the top wall 10a of the cover 10 is provided with a ventilation hole 10c that allows air to flow between the internal space and the external space.

As will be described later, the ventilation holes 10c suppress an increase in pressure inside the cover 10 when sealing the internal space with a sealing material, and release heat generated in the internal space by the energization operation to the outside. The specific installation position of the ventilation holes 10c will be described later.

The electromagnet device 12 displaces the movable spring 30b included in the movable contact portion 13 by appropriately switching between excitation and non-excitation based on energization from the outside. The electromagnet device 12 includes an iron core 22 having a suction piece 22a at its tip, a coil bobbin 23 that supports the iron core 22, a coil 24 wound around the coil bobbin 23, and two coil terminals 25. The coil terminal 25 is a connection terminal having one end connected to the coil 24 and the other end protruding to the outside. The coil bobbin 23 is made of synthetic resin, which is an insulating material.

The base of the electromagnetic relay 1 is composed of a support portion 42b of a fixed terminal holding portion 42, which will be described later, and a flange portion 11 of the coil bobbin 23. The base has a rectangular shape when viewed from the Z direction. The base is attached to the cover 10 by engaging the peripheral portion thereof with the inner peripheral portion of the opening portion 10d of the cover 10. In this state, as shown in FIG. 3, the coil 24 of the electromagnet device 12, the movable contact 33 of the movable contact portion 13, the fixed contact 44 of the fixed contact portion 14, and the joint iron 15 are housed in the internal space of the cover 10. To. Each connection terminal protrudes from the internal space toward the outside. After the base is attached, although not shown, a sealing material made of a liquid curable resin such as an epoxy seal is filled in the gap on the lower surface of the base to seal the internal space of the cover 10. As a result, the dustproof property of the internal space can be enhanced, and the support strength of each connection terminal can be enhanced.

The movable contact portion 13 has a main body portion 30, a movable terminal 31, and a polaron 32.

The main body portion 30 includes a fixed portion 30a connected to the joint iron 15 and a movable spring 30b continuously movable to the fixed portion 30a. The fixed portion 30a is a flat plate portion extending in the Z direction. The movable spring 30b is a flat plate portion extending toward the plus side in the X direction. The tip of the movable spring 30b on the plus side in the X direction is divided into two parts. Of these two movable division portions, the one located on the plus side in the Y direction is referred to as the first movable division portion 30c, and the one located on the minus side in the Y direction is referred to as the second movable division portion 30d. The first movable division portion 30c and the second movable division portion 30d each have a movable contact 33 on the first surface 30e corresponding to the negative side in the Z direction in the tip region on the positive side in the X direction. The two movable contacts 33 are displaced in the Z direction by swinging the movable spring 30b with the other end continuous with the fixed portion 30a as a base axis.

The movable terminal 31 is a connection terminal having one end connected to the fixed portion 30a of the main body portion 30 and the other end protruding to the outside. In this embodiment, there are two movable terminals 31.

The polaron 32 is a flat plate-shaped conductor installed on the movable spring 30b. One surface of the polaron 32 faces the surface of the adsorption piece 22a of the iron core 22.

The main body portion 30 and the movable terminal 31 can each be formed by bending a conductive sheet metal material punched into a predetermined shape. The main body 30 and the movable terminal 31 may be separate bodies and may be connected at the time of manufacture, or may be integrally formed from the beginning.

The fixed contact portion 14 has a fixed terminal 41, a fixed terminal holding portion 42, and a backstop 43.

The fixed terminal 41 is a connection terminal having a fixed contact 44 at one end and projecting to the outside at the other end. The fixed terminal 41 can be formed by bending a conductive sheet metal material punched into a predetermined shape. In this embodiment, there are two fixed terminals 41.

FIG. 5 is a side view of the internal configuration of the electromagnetic relay 1 as viewed from the plus side in the X direction. The two fixed terminals 41 have a shape symmetrical with respect to the center line C in the Y direction, and are installed so as to be adjacent to each other with respect to the center line C. Hereinafter, of the two fixed terminals 41, the one installed on the positive side in the Y direction is referred to as the first fixed terminal 41a, and the one installed on the negative side in the Y direction is referred to as the second fixed terminal 41b.

FIG. 6 is a diagram showing the shape of the first fixed terminal 41a. Of these, if FIG. 6 (c) is a front view seen from the plus side in the X direction, FIG. 6 (a) is a top view, FIG. 6 (b) is a side view seen from the plus side in the Y direction, and FIG. 6 (d). ) Is a side view seen from the minus side in the Y direction, FIG. 6 (e) is a back view, and FIG. 6 (f) is a bottom view. The direction indicated by each axis of XYZ in FIG. 6 is the same as that of each of the other figures. The first fixed terminal 41a includes the following four flat plate portions.

The fixed terminal main body portion 400 is a flat plate portion extending in the Z direction with the YZ plane facing the X direction as the main plane. The fixed terminal main body 400 is a flat plate portion including the terminal portion 400a protruding to the outside among the flat plate portions constituting the first fixed terminal 41a. In the example shown in FIG. 6, the terminal portion 400a in the fixed terminal main body portion 400 is in the X direction as compared with other parts of the fixed terminal main body portion 400 in consideration of stability after assembly of the electromagnetic relay 1. It is slightly off.

The fixed contact holding portion 401 is continuous with the Z-direction plus side end of the fixed terminal main body 400 with the XY plane as the main plane, and is curved to the X-direction minus side, that is, the opposite side of the movable spring 30b in the extending direction. It is a flat plate part. The fixed contact 44 is installed on the first surface of the fixed contact holding portion 401 corresponding to the positive side in the Z direction. As a result, the two fixed contacts 44 included in the fixed contact portion 14 and the two movable contacts 33 included in the movable contact portion 13 face each other in pairs along the Z direction as shown in FIG. Is placed in.

The fixed terminal arm portion 402 is a flat plate portion that is continuous with the first end side of the fixed terminal main body 400 on the positive side in the Y direction and is curved in the negative side in the X direction, with the XZ plane as the main plane. Expressed in comparison with the fixed terminal main body portion 400, the fixed terminal arm portion 402 is a flat plate portion that does not include the terminal portion 400a among the flat plate portions constituting the first fixed terminal 41a.

The terminal arm portion 403 is a flat plate portion having the XZ plane as the main plane, continuous with the second end side of the fixed terminal main body portion 400 on the minus side in the Y direction, and curved in the minus side in the X direction.

Here, among the flat plate portions constituting the first fixed terminal 41a, those facing the second direction, which is the X direction, for example, are defined as the first side terminal portions. On the other hand, among the flat plate portions constituting the first fixed terminal 41a, the one curved from the first end side of the first side terminal portion to the side opposite to the second direction is defined as the second side terminal portion. .. When these provisions are applied to the present embodiment, the fixed terminal main body portion 400 corresponds to the first side terminal portion, while the fixed terminal arm portion 402 corresponds to the second side terminal portion.

Further, assuming that the length of the fixed terminal arm portion 402 in the Z direction is L1 and the length of the terminal arm portion 403 in the Z direction is L2, as shown in FIG. 6C, the length L1 is the length L2. Longer than. On the other hand, the length of the fixed terminal arm portion 402 in the X direction and the length of the terminal arm portion 403 in the X direction are both L3 as shown in FIG. 6 (d). Further, as shown in FIG. 6D, the length L3 is about the same as the length L4 of the fixed contact holding portion 401 in the X direction.

Further, the presence of the fixed terminal arm portion 402 and the terminal arm portion 403 creates a space in the first fixed terminal 41a between the fixed terminal arm portion 402 and the terminal arm portion 403. Hereinafter, the width of this space in the Y direction is referred to as W1 as shown in FIG. 6 (e).

As described above, the shape of the second fixed terminal 41b is only symmetrical with respect to the shape of the first fixed terminal 41a with respect to the center line C in the Y direction shown in FIG. 5, and is regarded as the same shape. Since it can be done, a detailed explanation will be omitted.

FIG. 7 is a perspective view showing the internal configuration of the electromagnetic relay 1 shown in FIG. 2, excluding the first fixed terminal 41a and the second fixed terminal 41b for the sake of explanation.

The fixed terminal holding portion 42 holds the first fixed terminal 41a and the second fixed terminal 41b. The fixed terminal holding portion 42 is formed of an insulating material, is continuous with the fixed terminal fixing portion 42a in contact with the first fixed terminal 41a and the second fixed terminal 41b, and the fixed terminal fixing portion 42a, and is continuous with the flange portion of the coil bobbin 23. Includes a support 42b combined with 11.

The fixed terminal fixing portion 42a is a rectangular parallelepiped member that stands upright from the support portion 42b on the base side toward the plus side in the Z direction.

The fixed terminal fixing portion 42a has a first side portion 42a ₁ facing the first fixed terminal 41a or the second fixed terminal 41b in the X direction. The following three holes are formed in the first side portion 42a ₁ .

The terminal hole portions 42c and 42d each accommodate at least a part of the terminal arm portion 403. Of these, the terminal hole portion 42c accommodates the terminal arm portion 403 of the first fixed terminal 41a when the first fixed terminal 41a is combined with the fixed terminal fixing portion 42a. Similarly, the terminal hole portion 42d accommodates the terminal arm portion 403 of the second fixed terminal 41b when the second fixed terminal 41b is combined with the fixed terminal fixing portion 42a. That is, the terminal hole portions 42c and 42d are arranged in the central region of the fixed terminal fixing portion 42a in the Y direction in order to enable such storage. Here, the terminal hole portions 42c and 42d do not touch each other. Therefore, as shown in FIG. 5, even after the first fixed terminal 41a and the second fixed terminal 41b are combined with the fixed terminal fixing portion 42a, the first fixed terminal 41a and the second fixed terminal 41b have a width W2. Separate from each other.

As shown in FIG. 3, the backstop hole portion 42e houses the backstop end portion 43d provided in a part of the backstop 43, which will be described later, and supports the backstop 43. The backstop hole portion 42e is located in the central region of the fixed terminal fixing portion 42a in the Y direction and on the plus side in the Z direction with respect to the terminal hole portions 42c and 42d.

Further, each of the fixed terminal fixing portions 42a is continuous with the first side portion 42a ₁ , and has two second side surfaces 42a ₂ having one facing the positive side in the Y direction and the other facing the negative side in the Y direction. On the other hand, the second side surface 42a ₂ faces the inner surface of the fixed terminal arm portion 402 of the first fixed terminal 41a with a contact or a gap when the first fixed terminal 41a is combined with the fixed terminal fixing portion 42a. As a result, the second side surface 42a ₂ is covered with the fixed terminal arm portion 402 of the first fixed terminal 41a, as shown in FIG. Similarly, the other second side surface 42a ₂ is provided with contact or a gap on the inner surface of the fixed terminal arm portion 402 of the second fixed terminal 41b when the second fixed terminal 41b is combined with the fixed terminal fixing portion 42a. Face to face. As a result, the second side surface 42a ₂ is covered with the fixed terminal arm portion 402 of the second fixed terminal 41b, as shown in FIG.

Here, in order to enable such storage and covering, the length L11 between the inner surface of the terminal hole portion 42c on the positive side in the Y direction and the second side surface 42a ₂ on the positive side in the Y direction is first fixed. It is substantially the same as the width W1 at the terminal 41a. Similarly, the length L11 of the inner surface of the terminal hole portion 42d on the negative side in the Y direction and the second side surface 42a ₂ on the negative side in the Y direction is substantially the same as the width W1 in the second fixed terminal 41b.

Further, the length L12 in the X direction of the second side surface 42a ₂ is the same as the length L3 in the X direction of the fixed terminal arm portion 402, or slightly longer than the length L3.

Further, the length L13 of the fixed terminal fixing portion 42a in the Z direction is such that the fixed contact 44 and the movable contact 33 are not too far apart even when the fixed contact 44 and the movable contact 33 are separated from each other after all the internal components are combined as shown in FIG. , The length shall be such that abnormal energization is not made at the time of separation.

The backstop 43 is a regulating member for suppressing the displacement of the first movable dividing portion 30c and the second movable dividing portion 30d in which the movable contact 33 is installed, respectively. The backstop 43 can be formed by bending a conductive sheet metal material punched into a predetermined shape.

The backstop 43 has a regulating portion 43a, an arm portion 43b, a leg portion 43c, and a backstop end portion 43d.

As shown in FIG. 5, the restricting portion 43a corresponds to the Z-direction plus side in the X-direction plus-side tip region of the first movable division portion 30c and the second movable division portion 30d according to the position of the movable contact 33. It faces the second surface 30f. That is, in this embodiment, there are two regulation units 43a. The second surface 30f is located on the opposite side of the first surface 30e in the first movable division portion 30c and the second movable division portion 30d. Then, when the fixed contact 44 and the movable contact 33 are separated from each other, the regulating portion 43a can contact a part of the second surface 30f on the side opposite to the first surface 30e on the contact contact side. ..

The arm portion 43b is a flat plate portion extending along the Y direction, and has a first surface 43b ₁ facing the movable contact 33. The two regulation units 43a are installed on the first surface 43b ₁ .

The leg portion 43c is continuous with the arm portion 43b, and as shown in FIG. 5, a flat plate portion curved from the center of the length L21 between the two restricting portions 43a in the Y direction to the contact contact side, that is, the negative side in the Z direction. Is.

As shown in FIG. 3, the backstop end portion 43d is a flat plate portion curved from one end of the leg portion 43c to the side opposite to the X direction, that is, to the minus side in the X direction. As described above, the backstop end portion 43d is housed in the backstop hole portion 42e in the fixed terminal fixing portion 42a.

Here, as shown in FIG. 5, the length L22 of the leg portion 43c in the Y direction is shorter than the length L21 between the two restricting portions 43a. Further, in a state where the first fixed terminal 41a and the second fixed terminal 41b are held by the fixed terminal holding portion 42, at least the leg portion 43c is viewed from the axis along the Y direction intersecting the Z direction and the X direction. A part overlaps with the terminal arm portion 403 of the first fixed terminal 41a and the second fixed terminal 41b. In FIG. 5, the width at which the leg portion 43c overlaps with the terminal arm portion 403 of the first fixed terminal 41a in the Y direction is represented by W3. In the state where the first fixed terminal 41a and the second fixed terminal 41b are held, the length L22 of the leg portion 43c in the Y direction (width of the leg portion 43c) on the positive side in the Z direction with respect to the terminal arm portion 403. Is shorter than the width W4 between the first fixed terminal 41a and the second fixed terminal 41b.

Further, as shown in FIG. 3, the leg portion 43c is located at a position lower in the X direction than the end portion on the X-direction plus side of the arm portion 43b of the portion where the restricting portion 43a is installed, that is, the width. Only W5 bends from a position shifted to the minus side in the X direction. Further, in the fixed terminal fixing portion 42a, the surface on which the backstop hole portion 42e is formed is displaced to the minus side in the X direction by the width W6 from the surface on which the terminal hole portions 42c and 42d are formed. As a result, in the state where the first fixed terminal 41a and the second fixed terminal 41b are held in the X direction, the width W7 is represented from the surface of the fixed terminal main body 400 to the surface of the leg 43c of the backstop 43. There will be an interval. That is, a space S having a dimension in the Y direction of W4 and a dimension in the Z direction of W8 is formed between the leg portion 43c and the side wall 10b of the cover 10 adjacent to the leg portion 43c.

Further, as shown in FIG. 5, in the state where the first fixed terminal 41a and the second fixed terminal 41b are held, the backstop end portion 43d and the terminal arm portion 403 are separated from each other with a width W9 in the Z direction. is doing. On the other hand, in the Z direction, the lower surface 43d ₁ of the backstop end portion 43d is lower than the tip of the fixed terminal arm portion 402 on the plus side in the Z direction by the width W10. In other words, in the Z direction, the backstop end 43d is arranged between the end of the fixed terminal arm 402 on the fixed contact 44 side and the end of the terminal arm 403 on the fixed contact 44 side. ing.

Further, the joint iron 15 is a plate material formed of, for example, magnetic steel and curved in an L-shaped cross section. As described above, one flat plate portion of the joint iron 15 holds the fixing portion 30a included in the main body portion 30 of the movable contact portion 13. On the other hand, the other flat plate portion of the joint iron 15 is connected to the iron core 22 included in the electromagnet device 12. As a result, when the electromagnet device 12 is driven, a magnetic circuit is formed between the iron core 22, the quadrupole 32, and the joint iron 15.

Next, the contact operation of the electromagnetic relay 1 will be described. The movable contact 33 and the fixed contact 44 are arranged so as to face each other in the Z direction. Then, when the coil 24 of the electromagnet device 12 is not energized, the movable contact 33 and the fixed contact 44 are separated from each other. On the other hand, when the coil 24 is energized, the movable contact 33 approaches and contacts the fixed contact 44. Here, the time when the coil 24 is not energized means the time when the electromagnet device 12 is not excited, and when the coil 24 is not excited, the contact pole 32 is separated from the suction piece 22a by the urging force of the movable spring 30b toward the negative side in the Z direction. It is held in a state of being. On the other hand, the time when the coil 24 is energized means the time when the electromagnet device 12 is excited. At the time of excitation, the magnetic force of the suction piece 22a overcomes the urging force of the movable spring 30b, and the contact electrode 32 comes into contact with the suction piece 22a. The movable contact 33 is brought into contact with and separated from the fixed contact 44 in response to the swing of the movable contact portion 13, so that the contacts are switched. That is, in the electromagnetic relay 1, the movable contact 33 and the fixed contact 44 are brought into contact with each other when the energization of the electromagnet device 12 is switched on and off. In this embodiment, the fixed terminal 41 includes two fixed terminals, a first fixed terminal 41a and a second fixed terminal 41b, which are independent of each other. Therefore, when the fixed contact 44 and the movable contact 33 are separated from each other, the first fixed terminal 41a and the second fixed terminal 41b become non-conducting to each other.

Next, the operation of the electromagnetic relay 1 and the effect thereof will be described.

In the present embodiment, the fixed terminal 41 includes a fixed terminal main body 400 including the terminal 400a, a fixed contact holding portion 401 including the fixed contact 44, a fixed terminal arm 402, and a terminal arm 403. Have. The fixed terminal main body portion 400 and the fixed contact holding portion 401 are extended in the first direction, which is the Z direction, for example. The fixed terminal arm portion 402 curves from the first end side of the fixed terminal main body portion 400 to the side opposite to the second direction, which is the X direction, for example, and covers the side surface of the fixed terminal holding portion 42. The terminal arm portion 403 is curved from the second end side of the fixed terminal main body portion 400 to the side opposite to the second direction, and is housed in the terminal hole portions 42c and 42d formed in the fixed terminal holding portion 42. According to this configuration, the surface area of the fixed terminal 41 can be further increased by the amount of the fixed terminal arm portion 402 and the terminal arm portion 403, and the external dimensions of the electromagnetic relay 1 can be increased by increasing the size of the fixed terminal 41. Can be suppressed. As a result, it is possible to achieve both high energization capacity and miniaturization.

Further, the terminal arm portion 403 has a long plate shape having a large surface area like the fixed terminal arm portion 402, and is housed in the terminal hole portion 42c or 42d formed in the fixed terminal holding portion 42. As a result, the terminal arm portion 403 holds the fixed terminal 41 more stably and firmly while arranging the entire fixed terminal main body 400 so as to face the cover 10 side to dissipate heat more efficiently. It can be held by the portion 42. In particular, since the surface area of the fixed terminal arm portion 402 facing the cover 10 side can be increased, heat can be dissipated more efficiently from the fixed terminal 41, and the energization capacity can be increased and the size can be reduced. Further, by widening the surface area of the fixed terminal arm portion 402 to such that it covers the second side surface 42a ₂ of the fixed terminal holding portion 42, it is possible to dissipate heat from the fixed terminal 41 more efficiently, and the electromagnet device 12 can be used. Insulation with can be ensured. Here, to make the surface area of the fixed terminal arm portion 402 wide enough to cover the second side surface 42a ₂ of the fixed terminal holding portion 42, for example, the length L3 of the fixed terminal arm portion 402 in the second direction is set to the second. It means that the length L12 of the side surface 42a ₂ in the second direction is about the same as that of the side surface 42a 2.

Further, the fixed terminal arm portion 402 is arranged inside the electromagnetic relay 1 so as to cover the second side surface 42a ₂ . On the other hand, since the terminal arm portion 403 is housed in the terminal hole portion 42c or 42d formed in the fixed terminal holding portion 42, the terminal arm portion 403 is included in the fixed terminal holding portion 42 after assembly. That is, even if the surface area of the fixed terminal 41 is increased by the amount of the fixed terminal arm portion 402 and the terminal arm portion 403, the fixed terminal 41 is compactly included in the internal configuration of the electromagnetic relay 1, so that the size of the electromagnetic relay 1 is increased. Can be suppressed.

Further, regarding the backstop 43, as shown by the width W7 in FIG. 3, the leg portion 43c of the backstop 43 is opposite to the fixed terminal main body portion 400, which is the first side terminal portion of the present embodiment, in the second direction. It is separated to the side. Further, the leg portion 43c of the backstop 43 is provided between the two movable contacts 33 when viewed from the first direction on the projection surface having the second direction as a perpendicular line. Therefore, it is advantageous in improving the insulation between the fixed terminal 41 and the backstop 43.

Further, the backstop end portion 43d and the backstop hole portion 42e are provided between the two movable contacts 33 when viewed from the first direction on the projection surface having the second direction as a perpendicular line. This is advantageous in terms of ensuring the insulation between the fixed terminal 41 and the backstop 43 and reducing the size. Further, in relation to this point, it is desirable that the opening of the backstop hole 42e is arranged on the first direction side with respect to the openings of the terminal holes 42c and 42d in which the terminal arm 403 is housed. Further, at least a part of the leg portion 43c of the backstop 43 may overlap with the fixed terminal arm portion 402 when viewed from the axis along the third direction intersecting the first direction and the second direction.

Here, the terminal arm portion 403 included in the fixed terminal 41 and the backstop end portion 43d included in the backstop 43 are curved on the minus side in the X direction, that is, on the side opposite to the second direction, respectively. Therefore, the terminal arm portion 403 and the backstop end portion 43d are housed from the plus side in the X direction with respect to the terminal hole portions 42c and 42d or the backstop hole portion 42e formed in the fixed terminal holding portion 42. Become. Therefore, considering the assembly process of the electromagnetic relay 1, each component other than the cover 10 shown in FIG. 4 is in the X direction in this case, but can be combined in order along one direction. For example, with the movable contact portion 13 as a reference, the movable contact portion 13 is combined with the joint iron 15, the electromagnet device 12 is combined with the movable contact portion 13, the fixed terminal holding portion 42 is combined with the movable contact portion 13, and finally, the terminal arm portion 403 and the backstop end portion are combined with the movable contact portion 13. 43d may be engaged. As described above, the shapes of the terminal arm portion 403 and the backstop end portion 43d are advantageous for further simplifying or simplifying the assembly process of the electromagnetic relay 1. In this way, the fixed terminal holding portion 42 holds the electromagnet device 12 and the coil terminal 25.

Further, as shown by the width W3 in FIGS. 3 and 5, the backstop hole portion 42e is the first side of the present embodiment when viewed from the first direction on the projection plane having the second direction as a perpendicular line. It may overlap with the fixed terminal main body 400 which is a terminal portion. As a result, the dimension of the electromagnetic relay 1 in particular in the third direction can be made smaller, which is advantageous for miniaturization of the electromagnetic relay 1.

Further, as shown in FIG. 6, in the Z direction, the length L1 of the fixed terminal arm portion 402 may be longer than the length L2 of the terminal arm portion 403. That is, in the first direction, the fixed terminal arm portion 402 is longer than the terminal arm portion 403. Thereby, by setting the length L1 of the fixed terminal arm portion 402 as long as possible, the heat dissipation of the fixed terminal 41 can be further promoted. On the other hand, the length L2 of the terminal arm portion 403 is set shorter than the length L1 of the fixed terminal arm portion 402, so that the internal configuration of the electromagnetic relay 1 becomes more compact, and the legs of the backstop 43 are formed. The arrangement position of 43c can be secured. In this respect, as shown by the width W10 in FIG. 5, when viewed from the Z direction, the backstop end 43d is the end on the fixed contact 44 side of the fixed terminal arm 402 and the fixed contact of the terminal arm 403. It is particularly desirable to place it between the end on the 44 side.

Further, in the above description, the configuration in which the electromagnetic relay 1 includes two fixed terminals 41, a first fixed terminal 41a and a second fixed terminal 41b, is exemplified. However, in the present invention, the electromagnetic relay 1 may include one fixed terminal 41, and the above-mentioned actions and effects are the same even in this case.

On the other hand, when the electromagnetic relay 1 includes two fixed terminals 41 of the first fixed terminal 41a and the second fixed terminal 41b, the movable spring 30b is the first movable dividing portion 30c in which the movable contact 33 is installed. And may have a second movable split portion 30d. In this case, the leg portion 43c of the backstop 43 is curved from the center between the two restricting portions 43a provided on the arm portion 43b, and is arranged between the first fixed terminal 41a and the second fixed terminal 41b. Is desirable. As a result, as shown in FIG. 5, when viewed from the Y direction, one part of one leg 43c overlaps with the terminal arm 403 of the first fixed terminal 41a, and the other part is second fixed. It overlaps with the terminal arm portion 403 of the terminal 41b. Therefore, when the electromagnetic relay 1 includes the first fixed terminal 41a and the second fixed terminal 41b, it is advantageous to make the dimension of the electromagnetic relay 1 particularly in the Y direction smaller.

When the electromagnetic relay 1 includes the first fixed terminal 41a and the second fixed terminal 41b, in addition to the above configuration, the leg portion 43c of the backstop 43 is the first movable split portion 30c when viewed from the first direction. It may be arranged between the second movable division part 30d and the second movable division part 30d. In this case, it is advantageous to make the dimensions of the electromagnetic relay 1 particularly in the X direction and the Z direction smaller.

Further, with respect to the cover 10, as shown in FIGS. 1 and 3, the ventilation hole 10c may be provided between the leg portion 43c of the backstop 43 and the side wall portion 10b of the cover 10 adjacent to the leg portion 43c. good. That is, when viewed from the first direction, the ventilation hole 10c may be provided between the leg portion 43c of the backstop 43 and the side wall portion 10b of the cover 10 adjacent to the leg portion 43c. First, when the cover 10 is provided with the ventilation holes 10c, the portion provided with the ventilation holes 10c projects into the inside of the cover. Therefore, as shown in FIG. 3, if the ventilation hole 10c is provided at the position of the cover 10 corresponding to the space S formed by the leg portion 43c and the side wall 10b, the protruding portion of the ventilation hole 10c into the cover is a space. Since it fits within S, it is possible to suppress the increase in size of the electromagnetic relay 1. Secondly, since the space S is close to both the first fixed terminal 41a and the second fixed terminal 41b, the heat generated by the first fixed terminal 41a or the second fixed terminal 41b is likely to be guided to the space S. Therefore, by installing the ventilation holes 10c so as to face the space S, the heat generated inside the electromagnetic relay 1 can be efficiently released to the outside.

As described above, according to the present embodiment, it is possible to provide an electromagnetic relay which is advantageous for achieving both high energization capacity and miniaturization.

(Second Embodiment)
Next, the electromagnetic relay according to the second embodiment will be described. In the first embodiment, with respect to the backstop 43, the backstop end portion 43d and the corresponding backstop hole portion 42e are provided one by one according to the shape of the leg portion 43c. That is, the backstop hole portion 42e is a terminal hole portion 42c in which the terminal arm portion 403 of the first fixed terminal 41a and the second fixed terminal 41b is engaged when viewed from the Z direction on the projection surface whose vertical line is the X direction. , 42d and between. However, the present invention is not limited to this, and a plurality of backstop ends and corresponding backstop holes may be provided.

FIG. 8 is a perspective view showing the shape of the backstop 53 in the second embodiment. Note that FIG. 8 corresponds to FIG. 7 in which the backstop 43 in the first embodiment is drawn. In particular, the backstop 53 shown in FIG. 8 corresponds to the backstop 43 shown in FIG. 7. Further, the fixed terminal holding portion 52 shown in FIG. 8 corresponds to the fixed terminal holding portion 42 shown in FIG. 7.

The shape of the arm portion 53b included in the backstop 53 is the same as the shape of the arm portion 43b shown in FIG. On the other hand, the backstop 53 has three backstop ends 53d1 in which two regulating portions installed on the arm portion 53b are arranged in a row arranged along the Y direction with respect to _one leg portion 53c. , 53d ₂ and 53d ₃ . The shapes of the fixed terminal fixing portions 52b and the terminal hole portions 52c and 52d in the fixed terminal holding portion 52 are substantially the same as the shapes of the support portion 42b and the terminal hole portions 42c and 42d shown in FIG. 7, respectively. On the other hand, the fixed terminal fixing portion 52a in the fixed terminal holding portion 52 is engaged with three backstop hole portions 52e corresponding to each of the three backstop ends 53d ₁ , 53d ₂ , 53d ₃ respectively. ₁ , 52e ₂ , 52e ₃ are formed.

Here, as shown in FIG. 8, it is desirable that the pair of the backstop end portion 53d ₂ and the backstop hole portion 52e ₂ be installed at the same position as the leg portion 53c in the Y direction. Further, the pair of the backstop end 53d ₁ and the backstop hole _52e1 and the pair of the backstop end 53d ₃ and the backstop hole 52e ₃ are centered on the position of the leg 53c in the Y direction. It is desirable to install them symmetrically. As a result, the stability of the backstop 53 against the restriction of displacement of the movable spring 30b while being held by the fixed terminal fixing portion 52a is increased as compared with the case where the backstop 43 shown in FIG. 7 is used. Therefore, for example, even when the electromagnetic relay 1 receives an impact from the outside, it is possible to suppress the occurrence of problems such as the arm portion 53b tilting with respect to the leg portion 53c.

Further, even when the backstop 53 is adopted, the arrangement of the three backstop holes 52e ₁ , 52e ₂ , 52e ₃ with respect to the fixed terminal fixing portion 52a particularly in the X direction and the Z direction is the case where the back stop 43 is adopted. This is the same as the arrangement of the backstop hole portion 42e.

When there are a plurality of backstop hole portions 52e in this way, at least one of these backstop hole portions 52e is the projection plane having a perpendicular line in the second direction, and is viewed from the first direction in the present embodiment. It may be overlapped with the fixed terminal main body portion 400 which is the first side terminal portion. For example, of the three backstop ends 53d ₁ , 53d ₂ , 53d ₃ , there may be a configuration in which the backstop end 53d ₂ is not provided. That is, two backstop holes 52e ₁ are engaged with each of the two symmetrically arranged backstop ends 53d ₁ and 53d ₃ without providing the backstop end 53d ₂ . , 52e ₃ may be used.

(Third Embodiment)
Next, the electromagnetic relay according to the third embodiment will be described. In the first embodiment, regarding the fixed terminal 41, it is assumed that the fixed terminal main body 400 including the terminal 400a is the first side terminal portion facing in the second direction, while the fixed terminal arm portion 402 is the second side terminal. It was supposed to be a department. That is, in the first embodiment, the terminal portion 400a of the fixed terminal 41 is formed so that its main plane is a projection plane whose vertical line is the X direction. However, the present invention is not limited to this, and the fixed terminal main body including the terminal portion is the second side terminal portion, while the fixed terminal arm portion is the first side terminal portion facing the second direction. May be.

FIG. 9 is a perspective view showing the internal configuration of the electromagnetic relay according to the third embodiment. Note that FIG. 9 corresponds to FIG. 2, which shows the internal configuration of the electromagnetic relay 1 in the first embodiment. In FIG. 9, the same components as those of the electromagnetic relay 1 according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Specifically, in the electromagnetic relay according to the third embodiment, the shapes of the fixed terminal 61 and the fixed terminal holding portion 62 are different from the shapes of the fixed terminal 41 and the fixed terminal holding portion 42 of the electromagnetic relay 1 according to the first embodiment. ..

FIG. 10 is a diagram showing the shape of the first fixed terminal 61a. Note that FIG. 10 corresponds to FIG. 6 showing the shape of the first fixed terminal 41a in the first embodiment. The first fixed terminal 61a includes the following four flat plate portions.

The fixed terminal main body portion 602 is the second side terminal portion in the present embodiment, and is continuous with the first end side of the fixed terminal arm portion 600 on the positive side in the Y direction and on the negative side in the X direction with the XZ plane as the main plane. It is a curved flat plate part. Further, in the present embodiment, the fixed terminal main body portion 602 includes a terminal portion 602a projecting to the outside.

The fixed terminal arm portion 600 is the first side terminal portion in the present embodiment, and is a flat plate portion extending in the Z direction with the YZ plane facing the X direction as the main plane. Further, in the present embodiment, the fixed terminal arm portion 600 does not include the terminal portion protruding to the outside.

The fixed contact holding portion 601 is a flat plate portion having an XY plane as a main plane, continuous with the end side of the fixed terminal arm portion 600 on the positive side in the Z direction, and curved in the negative side in the X direction. Similar to the fixed contact 44 in the first embodiment, the fixed contact 64 is installed on the first surface corresponding to the positive side in the Z direction of the fixed contact holding portion 601.

The terminal arm portion 603 is a flat plate portion that is continuous with the second end side of the fixed terminal arm portion 600 on the minus side in the Y direction and is curved in the minus side in the X direction, with the XZ plane as the main plane.

The dimensions of each flat plate portion constituting the first fixed terminal 61a are based on the first fixed terminal 41a in the first embodiment. For example, the width of the space sandwiched between the fixed terminal main body portion 602 and the terminal arm portion 603 in the Y direction is W1 similar to that shown in FIG. 6 (e) as shown in FIG. 10 (e). On the other hand, as shown in FIG. 10D, the length L3a of the terminal arm portion 603 in the X direction is about the same as the length L4 of the fixed contact holding portion 601 in the X direction of the fixed terminal main body portion 602 in the X direction. It may be shorter than the length L3b of. Further, the shape of the second fixed terminal 61b is only symmetrical with respect to the shape of the first fixed terminal 61a, as in the first embodiment.

FIG. 11 is a perspective view showing the internal configuration of the electromagnetic relay shown in FIG. 9, in which the first fixed terminal 61a and the second fixed terminal 61b are removed for explanation.

The basic shape of the fixed terminal holding portion 62 is the same as that of the fixed terminal holding portion 42 in the first embodiment, including the dimensions of each part. Also in this embodiment, the first side portions 62a ₁ are formed with terminal hole portions 62c and 62d, respectively, for accommodating at least a part of the terminal arm portions 603. The installation positions of the terminal hole portions 62c and 62d are the same as those of the terminal hole portions 42c and 42d in the first embodiment. Further, the first side portion 62a ₁ is formed with a backstop hole portion for accommodating the backstop end portion 43d. The installation position of the backstop hole portion is also the same as that of the backstop hole portion 42e in the first embodiment.

On the other hand, one of the second side surfaces 62a ₂ of the fixed terminal fixing portion 62a faces the inner surface of the fixed terminal main body portion 602 with a contact or a gap when the first fixed terminal 61a is combined with the fixed terminal fixing portion 62a. do. As a result, the second side surface 62a ₂ is covered with the fixed terminal main body portion 602 of the first fixed terminal 61a, as shown in FIG. The same applies to the other second side surface 62a ₂ .

Further, the shape of the support portion 62b that is continuous with the fixed terminal fixing portion 62a and is combined with the flange portion 11 of the coil bobbin 23 is changed from the support portion 42b in the first embodiment according to the position of the terminal portion 602a.

According to the present embodiment, the installation position of the terminal portion 602a is different from that of the first embodiment, but the basic shape of the fixed terminal 61 and the configuration of the backstop 43 are not significantly changed, so that the same as the first embodiment. Play the effect of.

(Fourth Embodiment)
Next, the electromagnetic relay according to the fourth embodiment will be described. In the third embodiment, the first fixed terminal 61a and the second fixed terminal 61b each have a terminal arm portion 603, and the terminal arm portions 603 are formed in the terminal hole portions 62c and 62d formed in the fixed terminal fixing portion 62a, respectively. Is fixed to the fixed terminal fixing portion 62a by accommodating. Here, the terminal hole portions 62c and 62d are close to each other and are arranged in the central region of the fixed terminal fixing portion 62a in the Y direction. In addition, the openings of the terminal holes 62c and 62d have a shape extending along the Z direction according to the shape of the terminal arm 603. However, the present invention is not limited to this, and the shape of the terminal arm portion of the fixed terminal and the shape of the terminal hole portion of the fixed terminal fixing portion in which the fixed terminal is housed may be further changed.

FIG. 12 is a perspective view showing the internal configuration of the electromagnetic relay according to the fourth embodiment. Note that FIG. 12 corresponds to FIG. 9, which shows the internal configuration of the electromagnetic relay in the third embodiment. In FIG. 12, the same components as those of the electromagnetic relay according to the third embodiment are designated by the same reference numerals, and the description thereof will be omitted. Specifically, in the electromagnetic relay according to the fourth embodiment, the shapes of the second terminal arm portion 703 of the fixed terminal 71 and the terminal hole portions 72c and 72d of the fixed terminal fixing portion 72a are the shapes of the electromagnetic relay according to the third embodiment. The shapes of the terminal arm portion 603 and the terminal hole portions 62c and 62d are different.

FIG. 13 is a diagram showing the shape of the first fixed terminal 71a. Note that FIG. 13 corresponds to FIG. 10 showing the shape of the first fixed terminal 61a in the third embodiment. The first fixed terminal 71a also includes four flat plate portions like the first fixed terminal 61a in the third embodiment. Here, in the first fixed terminal 61a, the fixed terminal arm portion 600 has a terminal arm portion 603 that is continuous with the second end side of the fixed terminal arm portion 600 on the minus side in the Y direction with the XZ plane as the main plane. .. On the other hand, the fixed terminal arm portion 700 in the present embodiment has a second terminal arm portion 703 instead of the terminal arm portion 603. The second terminal arm portion 703 is a flat plate portion curved from the lower end side of the fixed terminal arm portion 700, which is the first side terminal portion, to the minus side in the X direction, with the XY plane as the main plane. The dimensions of each flat plate portion constituting the first fixed terminal 71a are based on the first fixed terminal 61a in the third embodiment.

FIG. 14 is a perspective view showing the internal configuration of the electromagnetic relay shown in FIG. 12, excluding the first fixed terminal 71a and the second fixed terminal 71b for the sake of explanation.

The basic shape of the fixed terminal holding portion 72 is the same as that of the fixed terminal holding portion 62 in the third embodiment, including the dimensions of each part. However, the terminal hole portions 72c and 72d in which the second terminal arm portion 703 is housed are close to each other and are arranged in the central region of the fixed terminal fixing portion 72a in the Y direction. In addition, the openings of the terminal holes 72c and 72d have a shape extending along the Y direction to match the shape of the second terminal arm 703.

According to the present embodiment, the shapes of the second terminal arm portion 703 and the terminal hole portions 72c and 72d are different from those of the third embodiment, but in this case as well, the basic shape of the fixed terminal 61 and the configuration of the backstop 43 are different. Since there are no major changes, the same effect as that of the first embodiment is obtained.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications and changes can be made within the scope of the gist thereof.

1 Electromagnetic relay 12 Electromagnet device 24 Coil 30b Movable spring 33 Movable contact 41 Fixed terminal 42 Fixed terminal holding part 42c, 42d Terminal hole 42e Backstop hole 43 Backstop 43d Backstop end 44 Fixed contact 400 Fixed terminal body part 402 Fixed terminal arm 403 Terminal arm

Claims (17)

An electromagnet device with a coil and
A fixed terminal having a fixed terminal main body extending in the first direction, a fixed terminal arm portion curved and continuous at the end of the fixed terminal main body, and two fixed contacts.
A movable spring that has two movable contacts that are in contact with and separated from the two fixed contacts, is extended in a second direction, and is movable by driving the electromagnet device.
A restricting portion provided so as to be able to abut on a surface opposite to the surface on the contact contact side, an arm portion provided with the restricting portion, and a curve from the arm portion to the contact contact side in the first direction. With a backstop, which has a leg,
A fixed terminal holding portion that holds the fixed terminal and the backstop,
Equipped with
One of the fixed terminal main body portion and the fixed terminal arm portion is a first side terminal portion facing the second direction.
The other side of the fixed terminal main body portion and the fixed terminal arm portion is a second side terminal portion curved from the first end side of the first side terminal portion to the side opposite to the second direction.
The leg portion of the backstop is provided so as to be separated from the first side terminal portion on the side opposite to the second direction, and is viewed from the first direction on a projection surface having the second direction as a perpendicular line. An electromagnetic relay provided between the two movable contacts. The electromagnetic relay according to claim 1, wherein the fixed terminal holding portion has a backstop hole portion for accommodating a backstop end portion provided at one end of the leg portion of the backstop. The electromagnetic relay according to claim 2, wherein the backstop end is curved from one end of the leg of the backstop to the side opposite to the second direction. The fixed terminal has a terminal arm portion that is curved in the direction opposite to the second direction from the second end side of the first side terminal portion that faces the first end side.
The electromagnetic relay according to any one of claims 1 to 3, wherein the fixed terminal holding portion has a terminal hole portion for accommodating the terminal arm portion. 2. The back stop end portion and the back stop hole portion are provided between the two movable contacts on a projection surface having the second direction as a perpendicular line when viewed from the first direction. Or the electromagnetic relay according to claim 3. The second or third aspect, wherein the backstop hole portion is provided so as to overlap the first side terminal portion when viewed from the first direction on a projection surface having the second direction as a perpendicular line. Electromagnetic relay. The electromagnetic relay according to claim 2 or 3, wherein a plurality of the backstop end portion and the backstop hole portion are provided according to a row in which the two movable contacts are lined up. 7. Claim 7 that at least one of the plurality of backstop holes is provided so as to overlap the first side terminal portion when viewed from the first direction on a projection surface having the second direction as a perpendicular line. The electromagnetic relay described in. The movable spring has two movable dividing portions, each of which is divided in the second direction and has each of the two movable contacts, at one end.
The electromagnetic relay according to any one of claims 1 to 8, wherein the legs of the backstop are arranged between the two movable split portions when viewed from the first direction. The fixed terminal has a terminal arm portion that is curved in the direction opposite to the second direction from the second end side of the first side terminal portion that faces the first end side.
The fixed terminal holding portion has a terminal hole portion for accommodating the terminal arm portion.
The electromagnetic relay according to claim 2 , wherein the opening of the backstop hole is arranged on the side in the first direction from the opening of the terminal hole. 4. The fourth aspect of the present invention, wherein at least a part of the leg portion of the backstop overlaps with the fixed terminal arm portion when viewed from an axis along a third direction intersecting the first direction and the second direction. Electromagnetic relay. The electromagnetic relay according to claim 4, wherein in the first direction, the fixed terminal arm portion is longer than the terminal arm portion. The fixed terminal main body portion is the first side terminal portion.
The electromagnetic relay according to any one of claims 1 to 12, wherein the fixed terminal arm portion is the second side terminal portion that covers the side surface of the fixed terminal holding portion. The fixed terminal main body portion is the second side terminal portion that covers the side surface of the fixed terminal holding portion.
The electromagnetic relay according to any one of claims 1 to 12, wherein the fixed terminal arm portion is the first side terminal portion. The fixed terminal arm portion has a second terminal arm portion and has a second terminal arm portion.
13. The second terminal arm portion is curved from the lower end side of the first side terminal portion to the side opposite to the second direction, and is housed in a terminal hole portion formed in the fixed terminal holding portion. The electromagnetic relay described in. The fixed terminal includes a first fixed terminal and a second fixed terminal having one each of the two fixed contacts.
According to any one of claims 1 to 15, the first fixed terminal and the second fixed terminal are non-conducting to each other when the two fixed contacts and the two movable contacts are separated from each other. The described electromagnetic relay. A cover that houses the electromagnet device and has a top wall and a side wall that surrounds the top wall.
With a vent provided in the top wall of the cover,
Seen from the first direction, the vents are provided between the legs of the backstop and the side walls of the cover in close proximity to the legs.
The electromagnetic relay according to any one of claims 1 to 16.

Images