Test switch device of electromagnetic relay, installation method and electromagnetic relay

Abstract

The invention discloses a test switch device of an electromagnetic relay, an installation method and the electromagnetic relay. The test switch device comprises a cover body and a toggle piece, the cover body detachably covers the shell and is provided with an assembly hole; the shifting piece is installed on the assembly hole and can slide between a first position and a second position, the shifting piece is provided with a pushing part, and the pushing part is inserted into the shell to push or release the pushing card in a sliding mode; a locking structure is further arranged between the shifting piece and the cover body so that the shifting piece can be locked when the shifting piece is shifted to the first position or the second position. The device has few parts and is convenient to operate and mount.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic relays, and in particular to a test switch device of an electromagnetic relay, an installation method and an electromagnetic relay. Background Art

[0002] At present, in the actual application process of the electromagnetic relay of the prior art, once the application equipment fails, in addition to the fault detection of the equipment itself, it is also necessary to perform abnormal detection on the relay to determine whether the equipment failure is caused by the abnormal operation of the relay. When performing abnormal detection on the relay, since the application equipment cannot work normally, it is necessary to perform abnormal test on the relay under non-excitation conditions (i.e., non-powered conditions).

[0003] To this end, a test switch is installed on the relay housing to achieve the condition that the coil is not energized. Through the test switch, the push card or armature in the electromagnetic relay can be moved, so that the contacts can complete the switch from NC to NO. After the test switch is restored, the contacts switch from NO to NC. At the same time, it is also required that the button can be self-locking in the NC or NO state, which is convenient for equipment debugging and avoids vibration during operation of the equipment, causing the button to shift so that the relay cannot maintain its original state and cause equipment operation failure. The test switch of this relay usually requires multiple parts to cooperate to realize the above-mentioned button and self-locking functions, which is inconvenient to assemble; in addition, the armature is easily scratched and produces dandruff when the test switch is used to push the armature. Summary of the invention

[0004] The main purpose of the present invention is to overcome the defect that a test switch in the prior art requires the coordination of multiple parts, and to provide a test switch device, an installation method and an electromagnetic relay for an electromagnetic relay, which have few parts and are easy to install.

[0005] The present invention adopts the following technical solution:

[0006] A test switch device for an electromagnetic relay is installed on a housing of the electromagnetic relay; it comprises a cover body and a toggle member; the cover body is detachably covered on the housing and is provided with an assembly hole; the toggle member is installed on the assembly hole and can slide between a first position and a second position, the toggle member is provided with a pushing portion, the pushing portion is inserted into the housing to slide and push or release the pushing card; a locking structure is also provided between the toggle member and the cover body to lock the toggle member when the toggle member is toggled to the first position or the second position.

[0007] Furthermore, a cavity is provided between the cover body and the shell; and the locking structure is located in the cavity.

[0008] Furthermore, the locking structure includes a slot and a convex portion; the convex portion is arranged on the inner side of the cover body, and the slot is arranged on the side of the toggle member opposite to the convex portion; or the slot is arranged on the inner side of the cover body, and the convex portion is arranged on the side of the toggle member opposite to the slot; the toggle member is locked by embedding the convex portion into the slot.

[0009] Furthermore, the locking structure includes two card slots and two protrusions; the two card slots are arranged on both sides of the sliding direction of the toggle member, and the two protrusions are arranged on the inner side of the cover body and are spaced apart along the sliding direction of the toggle member, or the two card slots are arranged on the inner side of the cover body and are spaced apart along the sliding direction of the toggle member, and the two protrusions are arranged on both sides of the sliding direction of the toggle member.

[0010] Furthermore, the slot is formed between two spaced-apart protrusions, the opposite sides of the two protrusions form the slot, one end of the two protrusions is connected to the toggle member or the cover body, and the other end of the two protrusions is formed with an opening of the slot for the convex portion to be embedded.

[0011] Furthermore, the toggle member is further provided with a sliding portion, and the sliding portion is in sliding contact with a corresponding side of the shell; the pushing portion is connected to the side of the sliding portion that is in sliding contact with the shell.

[0012] Furthermore, in the sliding direction of the toggle member, the size of the assembly hole is smaller than the size of the sliding portion.

[0013] The pushing portion is provided with limiting blocks on both sides of a direction perpendicular to the sliding direction of the toggle member; and the limiting blocks are located in the housing.

[0014] Furthermore, the assembly hole is divided into a giving way section and a sliding section, the giving way section is adapted to the pushing portion having the limiting block, the sliding section is communicated with the giving way section, the pushing portion having the limiting block is inserted into the giving way section, and then slides to the sliding section to be staggered with the giving way section, and the sliding section allows the pushing portion to slide between the first position and the second position.

[0015] Furthermore, the pushing portion slides between the first position and the second position along the length direction of the sliding section, and the dimension of the sliding section in the width direction is smaller than the dimension of the yielding section in the width direction.

[0016] Furthermore, the cover body is also provided with a through hole; and a toggle portion is provided on a side of the toggle member opposite to the cover body, and the toggle portion is passed through the through hole for toggle operation.

[0017] A method for installing a test switch device for an electromagnetic relay is used to assemble the test switch device for the electromagnetic relay. First, the pushing portion of the toggle member is inserted into one side of the assembly hole on the cover body, and then the toggle member is pushed to leave the one side of the assembly hole to achieve staggered installation. Then the toggle member can slide between a first position and a second position, and finally the cover body is detachably covered on the housing.

[0018] An electromagnetic relay comprises a housing and a magnetic circuit assembly, a contact assembly and a push card located inside the housing, wherein the armature of the magnetic circuit assembly is in transmission contact with the main body of the push card, and further comprises a test switch device of the electromagnetic relay, wherein one end of the main body opposite to the push portion is further provided with a bent portion to be connected to the moving spring piece, and when the toggle member is toggled to a first position, the push portion pushes the end of the main body where the bent portion is located to drive the moving spring piece to move, and when the toggle member is toggled to a second position, the push portion releases the end of the push card main body where the bent portion is located, and the moving spring piece returns to its position.

[0019] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the device of the present invention, the cover body is detachably covered on the housing, and the toggle member is assembled in the assembly hole on the cover body and then slides between the specified first position and the second position to avoid being separated from the assembly hole. The push card is pushed or released by the pushing portion of the toggle member, and the number of parts used is small and the installation is convenient. When the toggle member is toggled to the first position or the second position, the toggle member is locked by the locking structure, which is convenient for equipment debugging and ensures that the relay remains in its original state to avoid malfunctions and facilitate testing.

[0021] 3. The device of the present invention uses a convex portion and a slot to lock the toggle member, and has a simple structure and is easy to implement.

[0022] 4. The device of the present invention is provided with a sliding part that is in sliding contact with the corresponding side of the shell, so that the sliding of the toggle member is smoother; the shell is also provided with an assembly hole for the pushing part to be inserted, and the size of the assembly hole is smaller than the size of the sliding part; a limiting block is also provided on the pushing part, and the limiting block is located in the shell. The sliding part and the limiting block cooperate to limit the toggle member in the direction perpendicular to the sliding part, and the structure is more reliable.

[0023] 5. In the device of the present invention, the assembly hole is divided into a yielding section and a sliding section. The yielding section is adapted to the limit block on the pushing part so as to yield the limit block when the pushing part is inserted, thereby making the disassembly and assembly of the toggle member more convenient. When the pushing part slides from the yielding section to the sliding section, it is misaligned with the yielding section to avoid being separated from the assembly hole, that is, the sliding section is used to allow the pushing part to slide between the first position and the second position.

[0024] 6. In the device of the present invention, the push card is provided with a bending portion. When the toggle member is toggled to the first position, the pushing portion pushes the end of the bending portion of the push card body to drive the moving spring to act. Compared with pushing the armature, it can prevent hair debris from being generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The switch device structure of the present invention Figure 1 ;

[0026] Figure 2 The switch device structure of the present invention Figure 2 ;

[0027] Figure 3 The toggle member structure of the present invention Figure 1 ;

[0028] Figure 4 The toggle member structure of the present invention Figure 2 ;

[0029] Figure 5 for Figure 3 The main view;

[0030] Figure 6 It is a diagram of the coordination between the toggle member and the cover body;

[0031] Figure 7 for Figure 6 Bottom view of

[0032] Figure 8 for Figure 6 A cross-sectional view of

[0033] Fig. 9 It is the structural diagram of the electromagnetic relay of the present invention;

[0034] Fig.10 This is a front view of the electromagnetic relay of the present invention;

[0035] Fig.11 for Fig.10 (the toggle member is in the first position);

[0036] Fig.12 for Fig.10 (the toggle member is in the first position);

[0037] Fig.13 for Fig.10 Top view of (the toggle member is in the second position)

[0038] Fig.14 for Fig.10 (the toggle member is in the second position);

[0039] in:

[0040] 10. Shell; 11. Cavity; 12. Assembly hole; 13. Yield section; 14. Sliding section; 15. Push card; 15a. Bending portion; 16. Magnetic circuit assembly; 16a. Coil; 16b. Iron core; 16c. Yoke; 16d. Armature; 17. Contact assembly; 17a. Moving spring; 17b. Normally open static spring; 17c. Normally closed static spring; 20. Cover; 21. Locking structure; 22. Protrusion; 23. Card slot; 24. Boss; 25. Through hole; 30. Toggle member; 31. Pushing portion; 32. Sliding portion; 33. Limit block; 34. Toggle portion.

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0042] The present invention is further described below through specific implementation modes.

[0043] In the present invention, the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and are not intended to indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0045] See also Figures 1 to 14 A test switch device for an electromagnetic relay is installed on a housing 10 of the electromagnetic relay, and includes a cover body 20 and a toggle member 30. The cover body 20 is detachably covered on the housing 10, and can be located on a side of the housing 10 close to a push card 15. The toggle member 30 is installed on the cover body 20 and can be toggled to slide between a first position and a second position. The toggle member 30 is provided with a pushing portion 31, and the pushing portion 31 is inserted into the housing 10 to cooperate with the push card 15 in the housing 10. When the toggle member 30 is toggled to the first position, the pushing portion 31 pushes the push card 15, so that the push card 15 moves. When the toggle member 30 is toggled to the second position, the pushing portion 31 releases the push card 15, and the push card 15 returns to its position.

[0046] There is a cavity 11 between the cover 20 and the housing 10, and the cover 20 and the housing 10 can be fixed in a common detachable connection manner. In order to achieve self-locking of the toggle member 30, a locking structure 21 is further provided between the toggle member 30 and the cover 20. The locking structure 21 can be located in the cavity 11 between the cover 20 and the housing 10. When the toggle member 30 is toggled to the first position or the second position, the locking structure 21 locks the toggle member 30 so that the toggle member 30 maintains the position.

[0047] The locking structure 21 includes a slot 23 and a convex portion 22, and the convex portion 22 is inserted into the slot 23 to lock the toggle member 30 in a snap-fit ​​manner. Specifically, the convex portion 22 is arranged on the inner side of the cover 20, that is, the convex portion 22 is arranged on the side of the cover 20 opposite to the housing 10, and the slot 23 is arranged on the side of the toggle member 30 opposite to the convex portion 22. Alternatively, the slot 23 is arranged on the inner side of the cover 20, and the convex portion 22 is arranged on the side of the toggle member 30 opposite to the slot 23. At the same time, it is arranged that when the toggle member 30 is located at the first position or the second position, the convex portion 22 is just inserted into the slot 23.

[0048] Specifically, the locking structure 21 includes two slots 23 and two protrusions 22, one group of protrusions 22 and the slots 23 cooperate to lock the first position of the toggle member 30, and the other group of slots 23 and the protrusions 22 cooperate to lock the second position of the toggle member 30. The two slots 23 are arranged on both sides of the sliding direction of the toggle member 30, and the two slots 23 are symmetrically distributed on the toggle member 30. The two protrusions 22 are arranged on the inner side of the cover body 20 and are spaced apart along the sliding direction of the toggle member 30, and the two protrusions 22 are symmetrically distributed on the cover body 20. Alternatively, the two slots 23 are arranged on the inner side of the cover body 20 and are spaced apart along the sliding direction of the toggle member 30, and the two protrusions 22 are arranged on both sides of the sliding direction of the toggle member 30.

[0049] In this embodiment, the slot 23 can be formed between the two convex columns 24, and the opposite sides of the two convex columns 24 surround the slot 23. One end of the two convex columns 24 is connected to the toggle member 30 or the cover body 20, and the other end is formed with an opening of the slot 23 for the convex portion 22 to be inserted. Alternatively, the slot 23 can be a groove structure formed on the side of the toggle member 30 or the cover body 20. It is set according to the actual situation.

[0050] In order to ensure that the toggle member 30 slides more reliably, a sliding portion 32 is also provided on the toggle member 30. The sliding portion 32 is located in the cavity 11 and is in sliding contact with the corresponding side of the housing 10, that is, the sliding portion 32 slides along the surface of the housing 10 having the assembly hole 12, and the sliding portion 32 covers the assembly hole 12. The pushing portion 31 is connected to the side of the sliding portion 32 that is in sliding contact with the housing 10, and the pushing portion 31 is perpendicular to the sliding direction of the toggle member 30 in the figure. The housing 10 is provided with an assembly hole 12 on the side opposite to the cover body 20 for the pushing portion 31 to be inserted, and the pushing portion 31 slides along the assembly hole 12. In the sliding direction of the toggle member 30, the size of the assembly hole 12 is set to be smaller than the size of the sliding portion 32, and it is ensured that when the toggle member 30 slides, both ends of the toggle member 30 in the sliding direction are in sliding contact with the corresponding side of the housing 10.

[0051] In this embodiment, limit blocks 33 are respectively provided on both sides of the pushing portion 31 in a direction perpendicular to the sliding direction of the toggle member 30, and the limit blocks 33 are also parallel to the sliding portion 32. The limit blocks 33 are located inside the housing 10, and the sliding portion 32 is located outside the housing 10, so there is a gap between the limit blocks 33 and the sliding portion 32. The sliding portion 32 and the limit blocks 33 cooperate to limit the toggle member 30 in a direction perpendicular to the sliding portion 32.

[0052] Furthermore, the assembly hole 12 is further divided into a clearance section 13 and a sliding section 14. The clearance section 13 is located at one side in the length direction of the assembly hole 12. The clearance section 13 is adapted to the limit block 33 to make way for the limit block 33 when the push portion 31 is inserted, so that the push portion 31 and the limit block 33 of the toggle member 30 can be smoothly inserted into the housing 10. The sliding section 14 is connected to the clearance section 13. The sliding section 14 allows the push portion 31 to slide between the first position and the second position, that is, the push portion 31 slides between the first position and the second position along the length direction of the sliding section 14. The width direction of the sliding section 14 is smaller than the width direction of the clearance section 13, so that the limit block 33 is limited in the housing 10 to prevent the push portion 31 from detaching from the sliding section 14.

[0053] In this embodiment, in order to facilitate the toggle operation of the toggle member 30, a through hole 25 is further provided on the cover body 20, and a toggle portion 34 is provided on the side of the toggle member 30 opposite to the cover body 20. The toggle portion 34 is penetrated through the through hole 25 for toggle operation, and is configured such that when the toggle member 30 is in the first position, the toggle portion 34 is close to or in contact with one side of the through hole 25, and when the toggle member 30 is in the second position, the toggle portion 34 is close to or in contact with the other side of the through hole 25. Concave surfaces may also be provided on both sides of the toggle portion 34 in the toggle direction for easy operation. In addition, two convex portions 22 or two card slots 23 are also located on both sides of the through hole 25.

[0054] The present invention also proposes an installation method for a test switch device of an electromagnetic relay, which is used to install the above-mentioned test switch device of an electromagnetic relay. The toggle member 30 is installed on the housing 10, and the pushing portion 31 is first inserted into one side of the assembly hole 12, namely the yielding section 13, and then the toggle member 30 is slid so that the pushing portion 31 enters the sliding section 14 and forms a misalignment with the yielding section 13. The sliding section 14 allows the pushing portion 31 to slide between the first position and the second position, and finally the cover body 20 is detachably mounted on the housing 10.

[0055] The toggle member 30 has two states, respectively as follows: Fig.11 and Fig.12 , taking the sliding direction of the toggle member 30 as the left-right direction as an example. The toggle member 30 is in the first position, the convex portion 22 on the right side is embedded in the corresponding slot 23 to lock the toggle member 30, and the toggle portion 34 is close to the right side of the assembly hole 12. Fig.13 and Fig.14 , the toggle member 30 is in the second position, the protrusion 22 on the left side is embedded in the corresponding slot 23 to lock the toggle member 30 , and at this time the toggle portion 34 is close to the left side of the assembly hole 12 .

[0056] Based on this, the present invention also proposes an electromagnetic relay, including a housing 10 and a magnetic circuit assembly 16, a contact assembly 17 and a push card 15 located in the housing 10. The armature 16d of the magnetic circuit assembly 16 is in transmission contact with the main body of the push card 15, and also includes a test switch device of the electromagnetic relay. The end of the main body relative to the push portion 31 is also provided with a bent portion 15a to connect with the moving spring 17a. When the toggle member 30 is toggled to the first position, the push portion 31 pushes the end of the bent portion 15a of the main body to drive the moving spring 17a to move. When the toggle member 30 is toggled to the second position, the push portion 31 releases the end of the bent portion 15a of the main body of the push card 15, and the moving spring 17a returns to its original position.

[0057] In this embodiment, the push portion 31 is configured to be bent toward the position of the push card 15, that is, configured to be L-shaped. In practical applications, the shape of the push portion 31 can be adjusted according to the positional relationship between the assembly hole 12 and the push card 15. Fig.12 , Fig.14 In the embodiment, the push card 15 is located on the right side of the assembly hole 12, and the push portion 31 is bent to the right.

[0058] In the present invention, the magnetic circuit assembly 16 includes a coil 16a provided with enameled wire, an iron core 16b inserted in the coil 16a, a yoke 16c and an armature 16d, etc. The yoke 16c is connected to the iron core 16b, and the armature 16d is transmission-matched between the yoke 16c and the push card 15. The contact assembly 17 specifically includes a moving spring 17a, a normally open static spring 17b and a normally closed static spring 17c, etc. The moving spring 17a is provided with a moving contact, the normally open static spring 17b is provided with a normally open static contact, and the normally closed static spring 17c is provided with a normally closed static contact. The moving spring 17a is located between the normally open static spring 17b and the normally closed static spring 17c, and the bent portion 15a of the push card 15 is connected and matched with the moving spring 17a. In other embodiments, the contact assembly 17 only includes the movable reed 17a and the normally open static reed 17b, or the contact assembly 17 only includes the movable reed 17a and the normally closed static reed 17c, etc.

[0059] The electromagnetic relay of the present invention has an initial state as follows Fig.13 and Fig.14 As shown, at this time, the toggle member 30 is in the second position, and the protrusion 22 on the left side is embedded in the corresponding card slot 23 to lock the toggle member 30. At this time, the pushing portion 31 is away from the pushing card 15, and the contact assembly 17 is in the NC state. The moving contact of the moving spring piece 17a is attracted by the static contact of the normally closed static spring piece 17c.

[0060] See also Fig.11 , Fig.12 When the electromagnetic relay is to be tested, the toggle member 30 is toggled to the right. During the sliding process of the toggle member 30, the pushing portion 31 approaches the pushing card 15 and pushes the pushing card 15, and the pushing card 15 drives the moving spring 17a to move to the right. When the toggle member 30 reaches the first position, the moving contact of the moving spring 17a is attracted by the static contact of the normally open static spring 17b, and the convex portion 22 on the right side is embedded in the corresponding card slot 23 to lock the toggle member 30, so that the moving spring 17a maintains this position, realizing the switching from NC to NO, and the relevant detection operation can be performed.

[0061] After the test is completed, the toggle member 30 is pushed to the left. During the sliding process of the toggle member 30, the pushing portion 31 moves away from the pushing card 15 and releases the pushing card 15, and the pushing card 15 and the moving spring 17a return to their original positions, realizing the switching from NO to NC. When the toggle member 30 reaches the second position, the protrusion 22 on the left side is embedded in the corresponding card slot 23 to lock the toggle member 30.

[0062] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A test switch device for an electromagnetic relay, mounted on a housing of the electromagnetic relay; characterized in that: It includes a cover body and a toggle member; the cover body is detachably covered on the shell and is provided with an assembly hole; the toggle member is installed on the assembly hole and can slide between a first position and a second position, and the toggle member is provided with a pushing portion, which is inserted into the shell to slide and push or release the pushing card; a locking structure is also provided between the toggle member and the cover body to lock the toggle member when the toggle member is toggled to the first position or the second position.

2. A test switch device for an electromagnetic relay as claimed in claim 1, characterized in that: A cavity is defined between the cover and the shell; the locking structure is located in the cavity.

3. A test switch device for an electromagnetic relay as claimed in claim 1, characterized in that: The locking structure includes a slot and a convex portion; the convex portion is arranged on the inner side of the cover body, and the slot is arranged on the side of the toggle member opposite to the convex portion; or the slot is arranged on the inner side of the cover body, and the convex portion is arranged on the side of the toggle member opposite to the slot; the toggle member is locked by embedding the convex portion into the slot.

4. A test switch device for an electromagnetic relay as claimed in claim 3, characterized in that: The locking structure includes two card slots and two protrusions; the two card slots are arranged on both sides of the sliding direction of the toggle member, and the two protrusions are arranged on the inner side of the cover body and are spaced apart along the sliding direction of the toggle member, or the two card slots are arranged on the inner side of the cover body and are spaced apart along the sliding direction of the toggle member, and the two protrusions are arranged on both sides of the sliding direction of the toggle member.

5. A test switch device for an electromagnetic relay as claimed in claim 3, characterized in that: The slot is formed between two spaced-apart convex columns, and the opposite sides of the two convex columns surround the slot. One end of the two convex columns is connected to the toggle member or the cover body, and the other end of the two convex columns is formed with an opening of the slot for the convex portion to be embedded.

6. A test switch device for an electromagnetic relay as claimed in claim 1, characterized in that: The toggle member is further provided with a sliding portion, and the sliding portion is in sliding contact with a corresponding side of the shell; the pushing portion is connected to a side of the sliding portion that is in sliding contact with the shell.

7. A test switch device for an electromagnetic relay as claimed in claim 6, characterized in that: In the sliding direction of the toggle member, the size of the assembly hole is smaller than the size of the sliding portion.

8. A test switch device for an electromagnetic relay as claimed in claim 1, characterized in that: The pushing portion is provided with limiting blocks on both sides of a direction perpendicular to the sliding direction of the toggle member; and the limiting blocks are located in the housing.

9. A test switch device for an electromagnetic relay as claimed in claim 8, characterized in that: The assembly hole is divided into a giving way section and a sliding section. The giving way section is adapted to the pushing portion having the limit block. The sliding section is communicated with the giving way section. The pushing portion having the limit block is inserted into the giving way section and then slides to the sliding section to be staggered with the giving way section. The sliding section allows the pushing portion to slide between the first position and the second position.

10. A test switch device for an electromagnetic relay as claimed in claim 9, characterized in that: The pushing portion slides between the first position and the second position along the length direction of the sliding section, and the dimension of the sliding section in the width direction is smaller than the dimension of the giving way section in the width direction.

11. A test switch device for an electromagnetic relay as claimed in claim 1, characterized in that: The cover body is further provided with a through hole; a toggle portion is provided on a side of the toggle member opposite to the cover body, and the toggle portion is penetrated through the through hole for toggle operation.

12. A method for installing a test switch device of an electromagnetic relay, characterized in that: A test switch device for assembling an electromagnetic relay according to any one of claims 1 to 11, first inserting the pushing portion of the toggle member into one side of the assembly hole on the cover body, then pushing the toggle member away from the side of the assembly hole to achieve staggered installation, and then the toggle member can slide between a first position and a second position, and finally the cover body is detachably covered on the shell.

13. An electromagnetic relay, comprising a housing and a magnetic circuit assembly, a contact assembly and a push card located in the housing, wherein the armature of the magnetic circuit assembly is in transmission contact with the main body of the push card, characterized in that: It also includes a test switch device for an electromagnetic relay as described in any one of claims 1 to 11, wherein a bending portion is provided at one end of the main body relative to the pushing portion to be connected to the moving spring piece, and when the toggle member is toggled to a first position, the pushing portion pushes the end of the main body where the bending portion is located to drive the moving spring piece to move, and when the toggle member is toggled to a second position, the pushing portion releases the end of the pushing card main body where the bending portion is located, and the moving spring piece returns to its position.

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