Test switch device of electromagnetic relay and electromagnetic relay

Abstract

The utility model discloses a test switch device of an electromagnetic relay and the electromagnetic relay. The test switch device is installed on a shell of the electromagnetic relay. Comprising a cover body and a shifting 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 utility model has the advantages of few parts, convenient operation and convenient installation.

Description

Technical Field

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

[0002] Currently, in the practical application of existing electromagnetic relays, once a device fails, in addition to fault detection on the device itself, the relay must also be tested for abnormalities to determine whether the device failure is caused by abnormal relay operation. Since the device is no longer functioning properly, relay abnormality testing must be performed under de-energized conditions (i.e., unpowered conditions).

[0003] To this end, a test switch is installed on the relay housing. This allows the electromagnetic relay's push button or armature to move when the coil is de-energized, allowing the contacts to switch from NC to NO. After the test switch is reset, the contacts switch from NO to NC. Furthermore, the button must self-lock in either the NC or NO state. This facilitates device commissioning and prevents vibration during operation that could cause the button to shift, potentially preventing the relay from maintaining its original position and potentially leading to equipment malfunction. Such relay test switches typically require multiple components to implement the aforementioned push button and self-locking functions, making assembly inconvenient. Furthermore, using the test switch to push the armature can easily cause scratches and lint. Utility Model Content

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

[0005] The utility model adopts the following technical solutions:

[0006] A test switch device for an electromagnetic relay is mounted on a housing of the electromagnetic relay; it comprises a cover and a toggle member; the cover is detachably mounted on the housing and is provided with an assembly hole; the toggle member is mounted on the assembly hole and is slidable between a first position and a second position; the toggle member is provided with a push portion, which is inserted into the housing to slide and push or release the push card; a locking structure is also provided between the toggle member and the cover 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 and the shell; and the locking structure is located in the cavity.

[0008] Furthermore, the locking structure includes a slot and a protrusion; the protrusion 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 protrusion; or the slot is arranged on the inner side of the cover body, and the protrusion is arranged on the side of the toggle member opposite to the slot; the toggle member is locked by embedding the protrusion 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 bosses, and the opposite sides of the two bosses form the slot. One end of the two bosses is connected to the toggle member or the cover body, and the other end of the two bosses 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, which is in sliding contact with the corresponding side of the shell; and 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; 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 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, 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 width dimension of the sliding section is smaller than the width dimension of the yielding section.

[0016] Furthermore, 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 passed through the through hole for toggle operation.

[0017] An electromagnetic relay comprises a housing and a magnetic circuit assembly, a contact assembly and a push card located within 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 the end of the main body opposite to the push portion is further provided with a bent portion to be connected to the movable 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 movable 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 movable spring piece returns to its position.

[0018] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The device of the present invention has a cover body that is detachably covered on the housing. After the toggle member is assembled in the assembly hole on the cover body, it slides between a defined first position and a 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. Fewer parts are used 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 a locking structure, which facilitates equipment debugging and ensures that the relay remains in its original state, avoids malfunctions, and facilitates testing.

[0020] 3. The device of the utility model uses a convex portion and a slot to lock the toggle member, which has a simple structure and is easy to implement.

[0021] 4. The device of the present invention is provided with a sliding portion 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 portion to be inserted, and the size of the assembly hole is smaller than the size of the sliding portion; a limiting block is also provided on the pushing portion, and the limiting block is located in the shell. The sliding portion and the limiting block cooperate to limit the toggle member in the direction perpendicular to the sliding portion, and the structure is more reliable.

[0022] 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 to yield the limit block when the pushing part is inserted, 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 out of the assembly hole, that is, the sliding section allows the pushing part to slide between the first position and the second position.

[0023] 6. In the device of the present invention, the push card is provided with a bent portion. When the toggle member is toggled to the first position, the push portion pushes the end of the bent portion of the push card body to drive the dynamic spring to operate. Compared with pushing the armature, it can prevent the generation of hair scraps. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The switch device structure of the utility model Figure 1 ;

[0025] Figure 2 The switch device structure of the utility model Figure 2 ;

[0026] Figure 3 The toggle structure of the utility model Figure 1 ;

[0027] Figure 4 The toggle structure of the utility model Figure 2 ;

[0028] Figure 5 for Figure 3 The main view;

[0029] Figure 6 This is a diagram showing the coordination between the toggle member and the cover body;

[0030] Figure 7 for Figure 6 Bottom view of

[0031] Figure 8 for Figure 6 sectional view of

[0032] Figure 9 This is the structural diagram of the electromagnetic relay of the utility model;

[0033] Figure 10 This is the main view of the electromagnetic relay of the utility model;

[0034] Figure 11 for Figure 10 (the toggle member is in the first position);

[0035] Figure 12 for Figure 10 (the toggle member is in the first position);

[0036] Figure 13 for Figure 10 Top view (the toggle is in the second position)

[0037] Figure 14 for Figure 10 (the toggle member is in the second position);

[0038] in:

[0039] 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. Slot; 24. Boss; 25. Through hole; 30. Toggle member; 31. Pushing portion; 32. Sliding portion; 33. Limit block; 34. Toggle portion.

[0040] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0041] The present invention is further described below through specific implementation methods.

[0042] 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 precedence, 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. They are only used to facilitate the description of the present invention, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they 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 the specific circumstances.

[0043] In this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0044] See also Figures 1 to 14, a test switch device for an electromagnetic relay, is installed on the 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 the side of the housing 10 close to the 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, causing the push card 15 to move. 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.

[0045] A cavity 11 is defined between the cover 20 and the housing 10, and the cover 20 and the housing 10 can be secured using a conventional detachable connection. To achieve self-locking of the toggle member 30, a locking structure 21 is provided between the toggle member 30 and the cover 20. The locking structure 21 can be located within the cavity 11 between the cover 20 and the housing 10. When the toggle member 30 is moved to the first or second position, the locking structure 21 locks the toggle member 30, maintaining that position.

[0046] The locking structure 21 includes a slot 23 and a protrusion 22. The protrusion 22 engages with the slot 23 to achieve a snap-fit lock, locking the toggle member 30. Specifically, the protrusion 22 is disposed on the inner side of the cover 20, that is, on the side of the cover 20 opposite the housing 10, and the slot 23 is disposed on the side of the toggle member 30 opposite the protrusion 22. Alternatively, the slot 23 can be disposed on the inner side of the cover 20, and the protrusion 22 on the side of the toggle member 30 opposite the slot 23. Furthermore, the protrusion 22 is configured so that when the toggle member 30 is in the first position or the second position, the protrusion 22 fits neatly into the slot 23.

[0047] Specifically, the locking structure 21 includes two slots 23 and two protrusions 22. One set of protrusions 22 and slots 23 cooperate to lock the toggle 30 in the first position, and the other set of slots 23 and protrusions 22 cooperate to lock the toggle 30 in the second position. The two slots 23 are provided on either side of the toggle 30 in the sliding direction, and are symmetrically distributed on the toggle 30. The two protrusions 22 are provided on the inside of the cover 20 and are spaced apart along the sliding direction of the toggle 30, and are symmetrically distributed on the cover 20. Alternatively, the two slots 23 are provided on the inside of the cover 20 and are spaced apart along the sliding direction of the toggle 30, and the two protrusions 22 are provided on either side of the toggle 30 in the sliding direction.

[0048] In this embodiment, the slot 23 can be formed between the two protrusions 24, with the opposing sides of the two protrusions 24 forming the slot 23. One end of each protrusion 24 is connected to the toggle member 30 or the cover 20, while the other end forms an opening for the slot 23 for the protrusion 22 to fit into. Alternatively, the slot 23 can be a groove structure formed on the side of the toggle member 30 or the cover 20. The specific configuration depends on the actual situation.

[0049] To ensure more reliable sliding of the toggle member 30, a sliding portion 32 is further provided on the toggle member 30. The sliding portion 32 is located within the cavity 11 and in sliding contact with the corresponding side of the housing 10, so that 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. A push portion 31 is connected to the side of the sliding portion 32 that is in sliding contact with the housing 10. In the figure, the push portion 31 is perpendicular to the sliding direction of the toggle member 30. The housing 10 is provided with an assembly hole 12 on the side opposite to the cover 20 for the push portion 31 to be inserted into, and the push 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.

[0050] In this embodiment, limit blocks 33 are provided on either side of the push portion 31 in a direction perpendicular to the sliding direction of the toggle member 30. The limit blocks 33 are also parallel to the sliding portion 32. The limit blocks 33 are located inside the housing 10, while the sliding portion 32 is located outside the housing 10. A gap exists between the limit blocks 33 and the sliding portion 32. The sliding portion 32 and the limit blocks 33 cooperate to limit the position of the toggle member 30 in a direction perpendicular to the sliding portion 32.

[0051] Furthermore, the assembly hole 12 is further divided into a clearance section 13 and a sliding section 14. The clearance section 13 is located on one side of the assembly hole 12 in the longitudinal direction. The clearance section 13 is adapted to make way for the limiting block 33 when the pushing portion 31 is inserted, allowing the pushing portion 31 and the limiting block 33 of the toggle member 30 to be smoothly inserted into the housing 10. The sliding section 14 is connected to the clearance section 13. The sliding section 14 allows the pushing portion 31 to slide between a first position and a second position. That is, the pushing portion 31 slides between the first position and the second position along the length of the sliding section 14. The width dimension of the sliding section 14 is smaller than the width dimension of the clearance section 13, thereby confining the limiting block 33 within the housing 10 and preventing the pushing portion 31 from disengaging from the sliding section 14.

[0052] In this embodiment, to facilitate the toggle operation of the toggle member 30, a through hole 25 is provided on the cover 20. A toggle portion 34 is provided on the side of the toggle member 30 opposite the cover 20. The toggle portion 34 extends through the through hole 25 to facilitate the toggle operation. The toggle portion 34 is configured such that when the toggle member 30 is in a first position, the toggle portion 34 is adjacent to or in contact with one side of the through hole 25. When the toggle member 30 is in a second position, the toggle portion 34 is adjacent 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 to facilitate operation. Furthermore, two protrusions 22 or two latching grooves 23 are also provided on either side of the through hole 25.

[0053] During installation of the test switch device of the present invention, the toggle member 30 is installed on the housing 10. The push portion 31 is first inserted into one side of the assembly hole 12, i.e., the clearance section 13. The toggle member 30 is then slid so that the push portion 31 enters the sliding section 14 and is offset from the clearance section 13. The sliding section 14 allows the push portion 31 to slide between the first position and the second position. Finally, the cover body 20 is detachably mounted on the housing 10.

[0054] The toggle member 30 has two states, as follows: Figure 11 and Figure 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, and the protrusion 22 on the right side is embedded in the corresponding slot 23 to lock the toggle member 30. At this time, the toggle portion 34 is close to the right side of the assembly hole 12. Figure 13 and Figure 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 the toggle portion 34 is close to the left side of the assembly hole 12 .

[0055] Based on this, the present invention further provides an electromagnetic relay, comprising a housing 10 and a magnetic circuit assembly 16, a contact assembly 17, and a push card 15 located within 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. The electromagnetic relay also includes a test switch device. A bent portion 15a is provided at one end of the main body relative to the push portion 31 to connect with a movable spring 17a. When the toggle member 30 is toggled to a first position, the push portion 31 pushes against the end of the main body where the bent portion 15a is located to actuate the movable spring 17a. When the toggle member 30 is toggled to a second position, the push portion 31 releases the end of the main body where the bent portion 15a is located, causing the movable spring 17a to return to its original position.

[0056] In this embodiment, the pushing portion 31 is configured to be bent toward the location of the pushing card 15, that is, configured to be L-shaped. In actual application, the shape of the pushing portion 31 can be adjusted according to the positional relationship between the assembly hole 12 and the pushing card 15. Figure 12 、 Figure 14 In the embodiment, the pushing card 15 is located on the right side of the assembly hole 12, and the pushing portion 31 is bent to the right.

[0057] In the present invention, the magnetic circuit assembly 16 includes a coil 16a with enameled wire, an iron core 16b inserted into the coil 16a, a yoke 16c, and an armature 16d. The yoke 16c is connected to the iron core 16b, and the armature 16d is driven and engaged between the yoke 16c and the push card 15. The contact assembly 17 specifically includes a movable spring 17a, a normally open static spring 17b, and a normally closed static spring 17c. The movable spring 17a is provided with a movable 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 movable 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 engaged with the movable 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.

[0058] The electromagnetic relay of the utility model has an initial state as follows Figure 13 and Figure 14 As shown, at this time, the toggle member 30 is in the second position, and the protrusion 22 on the left 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 17a is attracted by the static contact of the normally closed static spring 17c.

[0059] See also Figure 11 、 Figure 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. 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. The protrusion 22 on the right side is embedded in the corresponding card groove 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 carried out.

[0060] After the test is completed, the toggle member 30 is toggled 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, pushing the card 15 and the movable 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.

[0061] The above is only a specific implementation method 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 push 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 according to claim 1, characterized in that: A cavity is defined between the cover and the housing; the locking structure is located in the cavity.

3. The test switch device for an electromagnetic relay according to claim 1, wherein: The locking structure includes a slot and a protrusion; the protrusion 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 protrusion; or the slot is arranged on the inner side of the cover body, and the protrusion is arranged on the side of the toggle member opposite to the slot; the toggle member is locked by embedding the protrusion 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. The test switch device for an electromagnetic relay according to claim 3, wherein: The slot is formed between two spaced-apart bosses, and the opposite sides of the two bosses form the slot. One end of the two bosses is connected to the toggle member or the cover body, and the other end of the two bosses is formed with an opening of the slot for the convex portion to be embedded.

6. The test switch device for an electromagnetic relay according to claim 1, wherein: The toggle member is further provided with a sliding portion, which 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.

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

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

10. The test switch device for an electromagnetic relay according to claim 9, wherein: The pushing portion slides between the first position and the second position along the length direction of the sliding section, and the width dimension of the sliding section is smaller than the width dimension of the yielding section.

11. The test switch device for an electromagnetic relay according to claim 1, wherein: 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 passed through the through hole for toggle operation.

12. An electromagnetic relay comprising a housing and a magnetic circuit assembly, a contact assembly, and a push card located within the housing, wherein the armature of the magnetic circuit assembly is in driving contact with the main body of the push card, characterized in that: It also includes a test switch device for the electromagnetic relay as described in any one of claims 1 to 11, wherein a bent portion is provided at one end of the main body relative to the pushing portion to be connected to a movable 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 bent portion is located to drive the movable 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 bent portion is located, and the movable spring piece returns to its position.

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