Electromagnetic relay with test slide block

Abstract

The utility model discloses an electromagnetic relay with a test slide block, which comprises a shell and a magnetic circuit part positioned in a shell cavity of the shell, the testing device further comprises a testing sliding block, the testing sliding block comprises a sliding block body and a pushing part arranged on the sliding block body, the sliding block body is connected to a sliding groove formed in the shell in a sliding mode, and the pushing part extends into a shell cavity of the shell. The sliding block main body is provided with a locking position and a testing position, the sliding block main body switches the two positions through sliding, the sliding block main body is in interference fit with the shell at the locking position, and when the sliding block is switched to the testing position, the pushing part pushes the armature of the magnetic circuit part to enable the armature to move to a suction position. According to the utility model, the test function is realized by adopting the test slide block, and the number of parts is small, so that the cost is reduced, and automatic assembly is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to an electromagnetic relay with a testing slide block. Background Art

[0002] An electromagnetic relay is an electronic control device that is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] Some electromagnetic relays in the prior art are equipped with a test structure, which is used by the debugger to detect whether the circuit at the load end of the relay is normal. The above-mentioned test structure usually includes a button and a compression spring. When the button is pressed, it pushes the armature of the magnetic circuit part to move, so that the armature and the iron core are attracted, thereby closing or disconnecting the contact part. When the button is released, the button is reset by the compression spring. This electromagnetic relay has the following shortcomings: there are many parts in the test structure, which increases the cost of parts on the one hand, and on the other hand, when automated assembly is adopted, it is found that multiple compression spring parts will be stacked together when the incoming materials are received, which makes it difficult for the compression spring to vibrate the plate and feed the materials, making it inconvenient for this relay to be assembled automatically. Utility Model Content

[0004] The utility model aims at the technical problems existing in the prior art and provides an electromagnetic relay with a test slider, which adopts the test slider to realize the test function and has fewer parts, which is beneficial to reducing costs and is also convenient for automatic assembly.

[0005] The utility model adopts the following technical solution to solve the technical problem: an electromagnetic relay with a test slider, comprising a shell, and a magnetic circuit part located in a shell cavity of the shell; further comprising a test slider, the test slider comprising a slider body and a pushing part arranged on the slider body, the slider body being slidably connected to a slide groove arranged in the shell, and the pushing part extending into the shell cavity of the shell; the slider body has two positions, a locking position and a test position, the slider body switches between the two positions by sliding, and the slider body is interference-fitted with the shell in the locking position, and when the slider is switched to the test position, the pushing part pushes the armature of the magnetic circuit part to move the armature to the attracted position.

[0006] Furthermore, a limit block is provided on the slider body on one side of its sliding direction, and the shell is provided with a limit groove corresponding to the limit block. When the slider body is switched to the locking position, the limit block enters the limit groove, and the two are in an interference fit.

[0007] Furthermore, the two side surfaces of the limiting block facing away from each other are respectively provided with one or more limiting convex bracts for interference fit with the inner side surfaces corresponding to the limiting groove.

[0008] Furthermore, the pushing portion is an elastically deformable buffer rod, and is in a deformed state when it abuts against the armature.

[0009] Furthermore, the buffer rod includes an inclined section for pushing the armature action; the buffer rod also includes a connecting section, one end of which is integrally formed with the slider body, and the other end of the connecting section is integrally formed with one end of the inclined section.

[0010] Furthermore, the inclination direction of the inclined section is opposite to the inclination direction of the part of the armature used for attraction in the released state; when the slider body is in the locked position, the pushing portion is located outside the tail end of the part of the armature used for attraction; and the angle between the connecting section and the inclined section is greater than 90°.

[0011] Furthermore, the slide groove leads to the shell cavity, and the shell is also provided with a mounting groove leading to the shell cavity and having a width greater than the slide groove, the mounting groove is located at one end of the slide groove and the two are connected; the slider body includes a first wide portion, a second wide portion, and a narrow portion located between the first wide portion and the second wide portion, the pushing portion is arranged in the second wide portion, the second wide portion and the pushing portion pass through the mounting groove and enter the shell cavity, and the narrow portion is slidably arranged in the slide groove; the first wide portion is located outside the shell cavity and is interference fit with the shell in the locked position.

[0012] Furthermore, at least one material reduction groove is provided on the side surface of the first wide portion.

[0013] Furthermore, the shell body includes an upper shell and a lower shell, the upper shell is connected to the top of the lower shell, the inner cavity of the lower shell constitutes the shell cavity, and the top of the lower shell is provided with the sliding groove, the upper shell is provided with a receiving groove, and the slider body can be slidably engaged in the receiving groove; the limiting groove is located on the side wall corresponding to the receiving groove.

[0014] Furthermore, the slider body is provided with an operating portion and / or a sliding direction indication mark that is convenient for manual pushing.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model also includes the test slider, which can be used to realize the test function, and only needs to use the test slider as a single part, with fewer parts, which is conducive to reducing costs and facilitating the use of automated assembly. In particular, the test slider has an interference fit with the housing in the locked position, which can prevent the test slider from accidentally sliding when no test is required, thereby preventing the relay from malfunctioning.

[0017] 2. The slider body adopts the cooperation of the limit block and the limit groove to achieve interference fit, which has a simple structure and is firmly locked. In particular, the limit block adopts the interference fit of the limit convex burl and the limit groove, so that the contact area between the limit block and the limit groove is small, thereby making it easier for the limit block to slide into or out of the limit groove.

[0018] 3. The push part is an elastically deformable buffer rod, which can buffer the pressure generated by the armature's resistance and extrusion and keep the test slider in the test position on the one hand, and ensure reliable contact between the armature and the iron core of the magnetic circuit part on the other hand, thereby ensuring the accuracy of the test result. In particular, the push part includes the inclined section, which makes the push part structure simpler, saves more materials, and is conducive to reducing costs.

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay with a test slider of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model before the lower shell is connected to the upper shell;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the test slider of the utility model;

[0022] Figure 3 It is a cross-sectional view of the upper shell of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the utility model when the test slide block is in a locked position;

[0024] Figure 5 It is a cross-sectional view of the utility model when the test slide block is in a locked position;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the utility model when the test slider is in the test position;

[0026] Figure 7 It is a cross-sectional view of the utility model when the test slider is in the test position;

[0027] In the figure, 1. upper shell, 11. limiting groove, 12. accommodating groove, 2. lower shell, 21. sliding groove, 22. mounting groove, 3. test slider, 31. slider body, 311. first wide part, 312. narrow part, 313. second wide part, 314. material reduction groove, 32. pushing part, 321. inclined section, 322. connecting section, 33. limiting block, 331. limiting convex burl, 34. operating part, 341. arc surface, 35. arrow indication mark, 4. magnetic circuit part, 41. armature, 42. iron core, 5. contact part. DETAILED DESCRIPTION

[0028] In the present utility model, the terms "first", "second", etc. are only used to distinguish similar objects, rather than to describe a specific order or sequence, and cannot be understood as indicating or implying relative importance. In the description, the directions or positional relationships indicated by "upper", "lower", "left", "right", "inner", "outer", "top / bottom", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model, rather than indicating or implying 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 utility model. 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.

[0029] In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more, and "at least one" means one or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. In the description of the present invention, unless otherwise clearly specified and limited, the terms "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figure 1-Figure 7 As shown, an electromagnetic relay with a test slider of the utility model comprises a housing, a test slider 3, and a contact portion 5 and a magnetic circuit portion 4 located in the housing cavity. The test slider 3 comprises a slider body 31 and a push portion 32 arranged on the slider body 31, the slider body 31 is slidably connected to a slide groove 21 arranged in the housing, and the push portion 32 extends into the housing cavity. The slider body 31 has two positions, a locking position and a test position, and the slider body 31 switches between the two positions by sliding, and the slider body 31 is interference fit with the housing in the locking position to limit the slider body 31 and prevent the slider body 31 from accidentally sliding. When the slider switches to the test position, the push portion 32 pushes the armature 41 of the magnetic circuit portion 4 to move the armature 41 to the attracted position.

[0031] In this embodiment, the housing includes an upper housing 1 and a lower housing 2, and the upper housing 1 is connected to the top of the lower housing 2. Specifically, the upper housing 1 and the lower housing 2 are snap-connected, but the connection method between the two is not limited to this. The inner cavity of the lower housing 2 constitutes the above-mentioned housing cavity, and the above-mentioned slide groove 21 is provided on the top of the lower housing 2, and the slide groove 21 extends along the length direction of the upper housing 1, so the sliding direction of the slider body 31 is located in the length direction of the lower housing 2. The upper housing 1 of the slide groove 21 is provided with 12 corresponding to the slide groove 21, and the slider body 31 can be slidably fitted in the 12.

[0032] like Figure 2 As shown, a limit block 33 is provided on the slider body 31 on one side of its sliding direction, and a limit groove 11 is provided on the shell corresponding to the limit block 33. When the slider body 31 is switched to the locked position, the limit block 33 enters the limit groove 11, and the two are in an interference fit. Specifically, the two side surfaces opposite to the limit block 33 are respectively provided with one or more limit convex buds 331, which are used to be in an interference fit with the inner side surface corresponding to the limit groove 11. In this way, the contact area between the limit block 33 and the limit groove 11 is smaller, so that it is easier for the limit block 33 to slide in or out of the limit groove 11. The above-mentioned limit groove 11 is specifically provided on the upper shell 1 and is located on the corresponding side wall 12, as shown in FIG. Figure 3 shown.

[0033] In this embodiment, the push portion 32 is an elastically deformable buffer rod, and is in a deformed state when it abuts against the armature 41. Figure 2 As shown, the buffer rod includes an inclined section 321 for pushing the armature 41. The buffer rod also includes a connecting section 322, one end of which is integrally formed with the slider body 31, and the other end of the connecting section 322 is integrally formed with one end of the inclined section 321, and the angle between the connecting section 322 and the inclined section 321 is greater than 90°. When the slider body 31 is in the locked position, the push portion 32 is located outside the tail end of the part of the armature 41 used for suction, and the inclined direction of the inclined section 321 of the push portion 32 is opposite to the inclined direction of the part of the armature 41 used for suction in the released state, so that when the slider body 31 is switched to the test position, the push portion 32 can also use the inclined surface of its inclined section 321 to provide guidance during the contact between the inclined section 321 and the armature 41 to avoid jamming.

[0034] In this embodiment, the slide groove 21 is through from top to bottom and leads to the shell cavity. The shell (specifically, the top of the lower shell 2) is also provided with a mounting groove 22 leading to its shell cavity and having a width greater than the slide groove 21. The mounting groove 22 is located at one end of the slide groove 21 and the two are connected. The position of the mounting groove 22 on the lower shell 2 roughly corresponds to the position of the limit groove 11 set on the upper shell 1. The slider body 31 includes a first wide portion 311, a second wide portion 313, and a narrow portion 312 located between the first wide portion 311 and the second wide portion 313, so that the slider body 31 is roughly I-shaped. The above-mentioned limit block 33 is arranged on the first wide portion 311, and the push portion 32 is arranged on the second wide portion 313. The second wide portion 313 and the push portion 32 pass through the mounting groove 22 and enter the shell cavity, and the narrow portion 312 is slidably arranged in the slide groove 21. The first wide portion 311 is located outside the shell cavity and is matched with the side wall 12 of the upper shell 1. At least one material reduction groove 314 is provided on the side of the first wide portion 311. Specifically, there are two material reduction grooves 314, which are located on two sides of the first wide portion 311 in the width direction of the shell. In other embodiments, there are two slide grooves, which are arranged opposite to each other and located outside the shell cavity. The shell is provided with a long hole leading to the shell cavity at the position between the two slide grooves, and the push part passes through the long hole to enter the shell cavity.

[0035] In this embodiment, the slider body 31 is provided with an operating portion 34 and / or a sliding direction indicator mark that is convenient for manual pushing. Figure 2 As shown, the operating part 34 and the sliding direction indicator are both located on the top surface of the first wide portion 311 of the slider body 31, and the operating part 34 has a concave arc surface 341 on one side in the sliding direction to fit the finger. The sliding direction indicator is specifically an arrow indicator 35.

[0036] The utility model provides an electromagnetic relay with a test slider, the initial state of which is as follows Figure 4 , Figure 5 As shown, at this time, the entire test slider 3 is roughly located at the left end of the shell, the limit block 33 on the slider body 31 enters the limit groove 11 of the upper shell 1, and the two are in an interference fit, so that the entire test slider 3 will not slide to the right at will; the pushing part 32 is located on the left side of the armature 41, and the armature 41 is in a released state.

[0037] When the tester needs to check whether the load-end circuit of the relay is normally switched, the slider body 31 is pushed to the left to make the limit block 33 on it withdraw from the limit slot 11. As the slider body 31 moves to the test position, the push part 32 also moves to the left and gradually contacts the armature 41 until the armature 41 is pushed to swing to the position where it is attracted to the iron core of the magnetic circuit part 4. Figure 6 , Figure 7During this process, the pusher 32 is deformed, which can buffer the pressure generated by the armature 41 and keep the test slider 3 in the test position, and ensure that the armature 41 is in reliable contact with the iron core of the magnetic circuit part 4, thereby ensuring the accuracy of the test result.

[0038] The utility model provides an electromagnetic relay with a test slider, which uses a test slider 3 instead of a button to realize a test function, does not need to use a compression spring, has fewer parts, and is conducive to reducing costs and facilitating automated assembly. In particular, the test slider 3 is interference-fitted with the housing in the locked position, which can prevent the test slider 3 from accidentally sliding when no test is required, thereby preventing the relay from malfunctioning.

[0039] The electromagnetic relay with a test slider of the utility model has the uninvolved parts (such as the specific structure and working principle of the magnetic circuit part 4 and the contact part 5) which are the same as those in the prior art or can be implemented by using the prior art.

[0040] The above embodiments are only used to further illustrate an electromagnetic relay with a test slider of the utility model, but the utility model is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model fall within the protection scope of the technical solution of the utility model.

Claims

1. An electromagnetic relay with a test slider, comprising a housing and a magnetic circuit portion located in a housing cavity of the housing; Features: It also includes a test slider, which includes a slider body and a pushing part arranged on the slider body, the slider body is slidably connected to the slide groove arranged in the shell, and the pushing part extends into the shell cavity of the shell; the slider body has two positions, a locking position and a test position, the slider body switches the two positions by sliding, and the slider body has an interference fit with the shell in the locking position, and when the slider is switched to the test position, the pushing part pushes the armature of the magnetic circuit part to move the armature to the attracted position.

2. The electromagnetic relay with a test slider according to claim 1, Features: The slider body is provided with a limit block on one side of its sliding direction, and the shell is provided with a limit groove corresponding to the limit block. When the slider body is switched to the locking position, the limit block enters the limit groove, and the two are in interference fit.

3. The electromagnetic relay with a test slider according to claim 2, Features: The two side surfaces of the limiting block facing away from each other are respectively provided with one or more limiting convex blisters for interference fit with the inner side surfaces corresponding to the limiting groove.

4. The electromagnetic relay with a test slider according to claim 1, Features: The pushing portion is an elastically deformable buffer rod, and is in a deformed state when it abuts against the armature.

5. The electromagnetic relay with a test slider according to claim 4, Features: The buffer rod includes an inclined section for pushing the armature action; the buffer rod also includes a connecting section, one end of which is integrally formed with the slider body, and the other end of the connecting section is integrally formed with one end of the inclined section.

6. The electromagnetic relay with a test slider according to claim 5, Features: The inclination direction of the inclined section is opposite to the inclination direction of the part of the armature used for attraction in the released state; when the slider body is in the locked position, the pushing portion is located outside the tail end of the part of the armature used for attraction; the angle between the connecting section and the inclined section is greater than 90°.

7. The electromagnetic relay with a test slider according to claim 1, Features: The slide groove leads to the shell cavity, and the shell is also provided with a mounting groove leading to the shell cavity and having a width greater than the slide groove, the mounting groove is located at one end of the slide groove and the two are connected; the slider body includes a first wide portion, a second wide portion, and a narrow portion located between the first wide portion and the second wide portion, the pushing portion is arranged in the second wide portion, the second wide portion and the pushing portion pass through the mounting groove and enter the shell cavity, and the narrow portion is slidably arranged in the slide groove; the first wide portion is located outside the shell cavity and is interference fit with the shell in the locked position.

8. The electromagnetic relay with a test slider according to claim 7, Features: At least one material reduction groove is provided on the side surface of the first wide portion.

9. The electromagnetic relay with a test slider according to claim 2 or 3, Features: The shell body includes an upper shell and a lower shell, the upper shell is connected to the top of the lower shell, the inner cavity of the lower shell constitutes the shell cavity, and the top of the lower shell is provided with the sliding groove, the upper shell is provided with a receiving groove, and the slider body can be slidably engaged in the receiving groove; the limiting groove is located on the side wall corresponding to the receiving groove.

10. The electromagnetic relay with a test slider according to claim 1, Features: The slider body is provided with an operating portion and / or a sliding direction indication mark that is convenient for manual pushing.

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