Electromagnetic relay with test button

Abstract

The utility model discloses an electromagnetic relay with a test button, which comprises a shell, a button and a magnetic circuit part positioned in the shell, and is characterized in that the button comprises a button main body and a pushing part arranged on the button main body; the button main body is movably mounted in a mounting groove formed in the shell, and the pushing part penetrates through a through hole formed in the bottom surface of the mounting groove to enter the shell and pushes the armature of the magnetic circuit part when the button main body is pressed, so that the armature moves to a suction position; the button main body is provided with an elastic part, and the elastic part is propped against the bottom surface of the mounting groove; the button body can rotate, a limiting groove is formed in the inner side face of the installation groove in the rotating path of the button body, the button body rotates to enable the elastic part to enter or exit from the limiting groove in the pressed state, and after the elastic part enters the limiting groove, the button is kept in the pressed state. The button is few in parts, low in cost and convenient to automatically assemble, the elastic part is directly matched with the limiting groove to limit the button in a pressed state, and the structure is simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to an electromagnetic relay with a test button. 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 component, which is used by the debugger to detect whether the circuit at the load end of the relay is normal. The above-mentioned test component usually includes a button, a compression spring, and a locking component. 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, and the locking component keeps the button in a pressed state to ensure that the armature and the iron core remain in an attracted state; 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 component, which increases the cost of parts on the one hand, and on the other hand, when automatic 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 to feed the material, making it inconvenient for this relay to adopt automatic assembly; after the button is pressed, it cannot automatically remain in the pressed state, and the tester needs to keep the force on the button, which is inconvenient for the tester to test. Although some relays can limit the state after the button is pressed, the limit structure is relatively complicated. Utility Model Content

[0004] The utility model aims at solving the technical problems existing in the prior art and provides an electromagnetic relay with a test button.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an electromagnetic relay with a test button, comprising a shell, a button, and a magnetic circuit part located in the shell, the button comprising a button body and a pushing part arranged on the button body; the button body is movably installed in a mounting groove arranged in the shell, the pushing part passes through a through hole arranged on the bottom surface of the mounting groove and enters into the shell, and when the button body is pressed, it pushes the armature of the magnetic circuit part to move the armature to an attracted position; the button body is provided with an elastic part for resetting the button and protruding laterally, and the elastic part abuts against the bottom surface of the mounting groove; the button body is rotatable, and the inner side surface of the mounting groove is provided with a limiting groove on the rotation path of the button body, and the button body is rotated in a pressed state to make the elastic part enter or exit the limiting groove, and after the elastic part enters the limiting groove, the button is kept in a pressed state.

[0006] Furthermore, the elastic part includes a plurality of elastic rods, which are distributed along the circumference of the button body, and each elastic rod is arranged at an angle; the number of the limiting grooves is multiple, and the multiple limiting grooves correspond to the multiple elastic rods one by one.

[0007] Furthermore, there are two elastic rods, which are located on opposite sides of the button body, and the distance between one end of the two elastic rods connected to the button body is smaller than the distance between the other ends of the two elastic rods used to abut against the bottom surface of the mounting 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 button body, and the other end of the connecting section is integrally formed with one end of the inclined section, and the angle between the two is greater than 90°.

[0010] Furthermore, the inner side surface of the installation groove is also provided with a limiting protrusion for limiting the elastic part from withdrawing from the installation groove; the limiting protrusion is a convex bulge structure.

[0011] Furthermore, the outer top surface of the shell is provided with a plurality of protrusions distributed at intervals, and the plurality of protrusions cooperate with the top surface of the shell to form the installation groove.

[0012] Furthermore, the number of the protrusions is two, the two protrusions are arranged along the width direction of the shell, and the two protrusions are used to surround one end of the installation groove, respectively facing different sides of the shell in the length direction, and suspended to form the limit groove; the part of the protrusion corresponding to the inner side surface of the installation groove is an arc surface, and the arc surfaces of the two protrusions are arranged opposite to each other to make way for the rotation of the button.

[0013] Furthermore, it also includes a top cover, which is connected to the top of the shell, and the top cover is provided with a limiting hole, which is connected to the installation slot. When the button is installed, the head of the button body passes upward through the limiting hole, and when the button is pressed, the head of the button body is limited above the limiting hole; the elastic part cannot pass through the limiting hole.

[0014] Furthermore, the side surface of the button body also includes two straight surfaces set back to back; the limiting hole and / or the mounting groove is in the shape of an elongated strip, and the long sides of the elongated strip cooperate with the two straight surfaces of the button body; the two inner side surfaces opposite to the limiting hole are respectively provided with arc-shaped notches for facilitating the rotation of the button body, and the two arc-shaped notches are arranged opposite to each other, and the two arc-shaped notches cooperate with the two arc-shaped surfaces set back to back on the side surfaces of the button body after the button body is pressed and rotated, and the arc-shaped surfaces and the straight surfaces are respectively arranged on adjacent sides of the button body; a recessed portion is provided between the two straight surfaces of the button body and the head of the button body; a recessed groove is provided on the top surface of the top cover, and the limiting hole is provided on the bottom surface of the recessed groove; the head of the button body is retracted into the recessed groove when it is in the pressed state.

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

[0016] 1. Since the button body of the utility model is provided with an elastic part for resetting the button and protruding laterally, the elastic part abuts against the bottom surface of the mounting groove, so that the utility model does not need to additionally set a compression spring to provide button resetting, which not only reduces the number of parts and reduces the material cost, but also enables the utility model to save the step of automatic loading of the compression spring when using automatic assembly, thereby making it easier to achieve automatic assembly. In addition, since the button body is rotatable, the inner side surface of the mounting groove is provided with a limiting groove on the rotation path of the button body, and the button body is rotated in the pressed state to make the elastic part enter or exit the limiting groove. After the elastic part enters the limiting groove, the button is kept in the pressed state, so that the utility model can also limit the button in the pressed state, thereby facilitating the test of the tester. In addition, the utility model directly uses the elastic part and the limiting groove to limit the button in the pressed state, and the structure is simpler and easier to process and form.

[0017] 2. The push part is an elastically deformable buffer rod, which can buffer the pressure generated by the armature's resistance and extrusion 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 results. 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.

[0018] 3. The inner side of the installation slot is also provided with a limiting convex portion for limiting the elastic portion from exiting the installation slot, which can limit the button so that the button is not easily separated from the housing after assembly. In particular, the limiting convex portion is a convex convex structure, making it easier for the button to be installed in the installation slot.

[0019] 4. The outer top surface of the shell is provided with a plurality of protrusions distributed at intervals, and the plurality of protrusions cooperate with the top surface of the shell to form the installation groove, so that the structure of the installation groove is easier to process and shape, and also saves more materials.

[0020] 5. The utility model further includes the top cover, which can make the overall appearance more concise and beautiful on the one hand, and can further limit the position of the button on the other hand, making it less likely to fall off accidentally.

[0021] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the electromagnetic relay with a test button of the utility model is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an exploded schematic diagram of the utility model (representing a part);

[0023] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0024] Figure 3 It is a three-dimensional structural schematic diagram of the button of the utility model;

[0025] Figure 4 It is a partial enlarged schematic diagram of the top cover of the utility model;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the utility model before the button is pressed;

[0027] Figure 6 is a cross-sectional view of the utility model before the button is pressed;

[0028] Figure 7 yes Figure 6 A magnified schematic diagram of part B;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the utility model after the button is pressed;

[0030] Fig. 9 is a cross-sectional view of the utility model after the button is pressed;

[0031] Fig.10 yes Fig. 9 A magnified schematic diagram of part C;

[0032] Fig.11 It is a schematic diagram of the three-dimensional structure of the utility model after the button is rotated;

[0033] Fig.12 This is a cross-sectional view of the utility model after the button is rotated. Figure 1 ;

[0034] Fig.13 yes Fig.12 An enlarged schematic diagram of part D in the middle;

[0035] Fig.14This is a cross-sectional view of the utility model after the button is rotated. Figure 2 ;

[0036] In the figure, 1, shell, 11, mounting groove, 111, through hole, 12, limiting groove, 13, protrusion, 14, limiting protrusion, 2, button, 21, button body, 211, recessed portion, 22, pushing portion, 221, inclined section, 222, connecting section, 23, elastic rod, 3, top cover, 31, limiting hole, 311, arc-shaped notch, 32, sinking groove, 4, magnetic circuit part, 41, armature, 42, iron core, 5, contact part. DETAILED DESCRIPTION

[0037] In the present invention, the directions or positional relationships indicated by "upper", "lower", "left", "right", "inner", "outer", "top / bottom" and the like in the description are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, and do not 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 ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between 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.

[0039] See also Figure 1-Figure 14As shown, an electromagnetic relay with a test button of the utility model comprises a housing 1, a button 2, and a magnetic circuit part 4 and a contact part 5 located in the housing 1. The button 2 comprises a button body 21 and a push part 22 arranged on the button body 21. The button body 21 is movably mounted on the mounting groove 11 arranged on the top of the housing 1. The push part 22 enters the housing 1 through the through hole arranged on the bottom surface of the mounting groove 11, and pushes the armature 41 of the magnetic circuit part 4 when the button body 21 is pressed, so that the armature 41 moves to the suction position. The button body 21 is integrally formed with an elastic part for resetting the button 2 and protruding laterally, and the elastic part abuts against the bottom surface of the mounting groove 11. The button body 21 is rotatable, and the inner side surface of the mounting groove 11 is provided with a limiting groove 12 on the rotation path of the button body 21. When the button body 21 is pressed, the elastic part enters or exits the limiting groove 12 by rotating, and after the elastic part enters the limiting groove 12, the button 2 is kept in the pressed state, that is, the button 2 is self-locked.

[0040] In this embodiment, the outer top surface of the housing 1 is provided with a plurality of protrusions 13 distributed at intervals, and the plurality of protrusions 13 cooperate with the top surface of the housing 1 to form a mounting groove 11. Specifically, as Figure 2 As shown, there are two protrusions 13, which are arranged along the width direction of the housing 1, and one end of the two protrusions 13 used to surround the installation groove 11 faces different sides of the housing 1 in the length direction, and is suspended to form a limit groove 12. The part of the protrusion 13 corresponding to the inner side surface of the installation groove 11 is an arc surface, and the arc surfaces of the two protrusions 13 are arranged opposite to each other to make way for the rotation of the button 2.

[0041] In this embodiment, the elastic part includes a plurality of elastic rods 23, which are distributed along the circumference of the button body 21, and each elastic rod 23 is tilted. There are a plurality of limit grooves 12, and the plurality of limit grooves 12 correspond to the plurality of elastic rods 23 one by one. Specifically, there are two elastic rods 23, and the two elastic rods 23 are located on opposite sides of the button body 21, and the distance between the ends of the two elastic rods 23 connected to the button body 21 is smaller than the distance between the other ends of the two elastic rods 23 used to abut against the bottom surface of the mounting groove 11, that is, the two elastic rods 23 are roughly in an eight-shaped shape.

[0042] In this embodiment, the inner side surface of the installation groove 11 is also provided with a limiting protrusion 14 for limiting the elastic part from exiting the installation groove 11. The limiting protrusion 14 is preferably a convex bulge structure, so that the button 2 is easier to install into the installation groove 11. This is because when the button 2 is installed into the installation groove 11, the elastic rod 23 of the button 2 will be blocked by the bulge, but since the bulge is small in size and the contact area with the elastic rod 23 is very small, it is easier for the elastic rod 23 to pass over the bulge downward. Since the installation groove 11 is composed of the above-mentioned two protrusions 13 and the top surface of the shell 1, the limiting protrusion 14 is specifically located on the protrusion 13, and each protrusion 13 is respectively provided with a limiting protrusion 14, such as Figure 2 Therefore, after the button 2 and the housing 1 are assembled, each elastic rod 23 is stopped by the limiting protrusion 14, as shown in FIG. Figure 6 , Figure 7 As shown, the button 2 is not easily separated from the mounting groove 11.

[0043] The pusher 22 is an elastically deformable buffer rod, and is deformed when it abuts against the armature 41. Figure 3 As shown, the buffer rod includes an inclined section 221 for pushing the armature 41, and the buffer rod also includes a vertically extending connecting section 222, one end of the connecting section 222 is integrally formed with the button body 21, and the other end of the connecting section 222 is integrally formed with one end of the inclined section 221, and the angle between the two is greater than 90°.

[0044] The utility model also includes a top cover 3, which is connected to the top of the housing 1, and the top cover 3 covers each protrusion 13, making the entire appearance more concise and beautiful. The top cover 3 is provided with a limiting hole 31, and the limiting hole 31 is connected to the installation slot 11. When the button 2 is installed, the head of the button body 21 passes through the limiting hole 31 upward. When the button 2 is pressed, the head of the button body 21 is limited above the limiting hole 31, which can prevent the button 2 from being damaged by excessive pressing. The elastic part (i.e., the two elastic rods 23) cannot pass through the limiting hole 31, so the button 2 can be further limited to prevent the button 2 from accidentally falling off.

[0045] The side of the button body 21 also includes two straight surfaces that are arranged back to back; the above-mentioned limiting hole 31 and / or mounting groove 11 are in the shape of an elongated strip. When the button 2 is assembled in the housing 1, the long side of the elongated strip cooperates with the two straight surfaces of the button body 21. Specifically, in this embodiment, the limiting hole 31 and / or mounting groove 11 are both in the shape of an elongated strip, but it is not limited thereto. In other embodiments, the limiting hole 31 or mounting groove 11 is in the shape of an elongated strip. In this way, on the one hand, it has a limiting effect on the button 2 during the operation of the button 2, and on the other hand, it has a foolproof effect when the button 2 is assembled. The middle of the two opposite inner side surfaces of the limiting hole 31 are respectively provided with an arc-shaped notch 311 for facilitating the rotation of the button body. The two arc-shaped notches 311 are arranged opposite to each other, and the two arc-shaped notches 311 cooperate with the two arc-shaped surfaces that are arranged back to back on the side of the button body 21 after the button body 21 is pressed and rotated. The arc-shaped surface and the straight surface are respectively arranged on the adjacent sides of the button body 21. A recessed portion 211 is provided between the two straight surfaces and the head of the button body, and the recessed portion 211 is used to make way for the button to rotate. A recessed groove 32 is provided on the top surface of the top cover 3, and a limiting hole 31 is provided on the bottom surface of the recessed groove 32. When the button body 21 is pressed, its head is received in the recessed groove 32. The head of the button body 21 is in a long strip shape, but is not limited thereto.

[0046] The utility model provides an electromagnetic relay with a test button, the initial state of which is as follows Figure 5-Figure 7 As shown, at this time, the two elastic rods 23 on the button body 21 are in a reset state and are distributed along the length direction of the shell 1. The top of the button body 21 is higher than the top surface of the top cover 3; the pushing portion 22 is located above the armature 41, and the armature 41 is in a released state.

[0047] When the tester needs to check whether the load-end circuit of the relay is normally switched, the button 2 is pressed to move the push part 22 downward and contact 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 8-Figure 10 In this process, the push part 22 is deformed, which can buffer the pressure generated by the armature 41 and ensure the reliable contact between the armature 41 and the core of the magnetic circuit part 4, thereby ensuring the accuracy of the test results. At this time, the top of the button body 21 is received in the sink 32 of the top cover 3, and the two elastic rods 23 are squeezed and deformed into a horizontal state, as shown in FIG. Fig.10 On this basis, the button 2 is rotated clockwise so that each elastic rod 23 enters the corresponding limit groove 12, so that the button 2 remains in the pressed state, as shown in FIG. Figure 11-Figure 14 After the test is completed, the button 2 is rotated in the opposite direction so that each elastic rod 23 rotates out of the limiting groove 12 respectively, and the entire button 2 is reset upward under the restoring force of the elastic rod 23.

[0048] The utility model is an electromagnetic relay with a test button, which does not need to additionally set a compression spring and a locking component to provide the reset and locking of the button 2, which not only reduces the number of parts and reduces the material cost, but also enables the utility model to save the step of automatic loading of the compression spring when using automatic assembly, so as to facilitate the automatic assembly. In addition, since the button body 21 is rotatable, the button body 21 rotates in the pressed state to make the elastic part enter or exit the limit groove 12 on the side of the installation groove 11, and after the elastic part enters the limit groove 12, the button 2 is kept in the pressed state, that is, self-locking is achieved, so as to facilitate the tester to test. Therefore, the utility model does not need to set a locking component separately, and does not need the housing to cooperate with the locking component, which is conducive to the housing to achieve a narrow design, that is, to achieve miniaturization. In addition, the utility model directly uses the elastic part and the limit groove 12 to limit the button 2 in the pressed state, and the structure is simpler and easier to process and form.

[0049] The electromagnetic relay with a test button of the utility model does not involve parts (such as the specific structure and working principle of the magnetic circuit part 4 and the contact part 5) that are the same as those in the prior art or can be implemented by using the prior art.

[0050] The above embodiments are only used to further illustrate an electromagnetic relay with a test button 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 button, comprising a housing, a button, and a magnetic circuit portion located in the housing, wherein the button comprises a button body and a push portion provided on the button body; the button body is movably mounted in a mounting groove provided in the housing, the push portion passes through a through hole provided on the bottom surface of the mounting groove and enters into the housing, and when the button body is pressed, pushes an armature of the magnetic circuit portion, so that the armature moves to an engaged position; characterized in that: The button body is provided with an elastic part which is used for resetting the button and protrudes laterally, and the elastic part abuts against the bottom surface of the mounting groove; the button body is rotatable, and the inner side surface of the mounting groove is provided with a limiting groove on the rotation path of the button body. When the button body is pressed, the elastic part enters or exits the limiting groove by rotating. After the elastic part enters the limiting groove, the button is kept in the pressed state.

2. The electromagnetic relay with a test button according to claim 1, characterized in that: The elastic part includes a plurality of elastic rods, which are distributed along the circumference of the button body and are arranged obliquely. The number of the limiting grooves is multiple, and the multiple limiting grooves correspond to the multiple elastic rods one by one.

3. The electromagnetic relay with a test button according to claim 2, characterized in that: There are two elastic rods, which are located on opposite sides of the button body, and the distance between one end of the two elastic rods connected to the button body is smaller than the distance between the other ends of the two elastic rods used to abut against the bottom surface of the installation groove.

4. The electromagnetic relay with a test button according to claim 1, characterized in that: 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 button according to claim 4, characterized in that: 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 button body, and the other end of the connecting section is integrally formed with one end of the inclined section, and the angle between the two is greater than 90°.

6. The electromagnetic relay with a test button according to claim 1, characterized in that: The inner side surface of the installation groove is also provided with a limiting protrusion for limiting the elastic part from withdrawing from the installation groove; the limiting protrusion is a convex bulge structure.

7. The electromagnetic relay with a test button according to claim 1, characterized in that: The outer top surface of the shell is provided with a plurality of protrusions distributed at intervals, and the plurality of protrusions cooperate with the top surface of the shell to form the installation groove.

8. The electromagnetic relay with a test button according to claim 7, characterized in that: There are two protrusions, which are arranged along the width direction of the shell, and the two protrusions are used to surround one end of the installation groove, which faces different sides of the shell in the length direction and are suspended to form the limit groove; the part of the protrusion corresponding to the inner side surface of the installation groove is an arc surface, and the arc surfaces of the two protrusions are arranged opposite to each other to make way for the rotation of the button.

9. The electromagnetic relay with a test button according to any one of claims 1 to 8, characterized in that: It also includes a top cover, which is connected to the top of the shell, and the top cover is provided with a limiting hole, which is connected to the installation slot. When the button is installed, the head of the button body passes through the limiting hole upward, and when the button is pressed, the head of the button body is limited above the limiting hole; the elastic part cannot pass through the limiting hole.

10. The electromagnetic relay with a test button according to claim 9, characterized in that: The side surface of the button body also includes two straight surfaces set back to back; the limiting hole and / or the mounting groove is in the shape of an elongated strip, and the long sides of the elongated strip cooperate with the two straight surfaces of the button body; the two inner side surfaces opposite to the limiting hole are respectively provided with arc-shaped notches for facilitating the rotation of the button body, and the two arc-shaped notches are arranged opposite to each other, and the two arc-shaped notches cooperate with the two arc-shaped surfaces set back to back on the side surfaces of the button body after the button body is pressed and rotated, and the arc-shaped surfaces and the straight surfaces are respectively arranged on adjacent sides of the button body; a recessed portion is provided between the two straight surfaces of the button body and the head of the button body; a recessed groove is provided on the top surface of the top cover, and the limiting hole is provided on the bottom surface of the recessed groove; the head of the button body is retracted into the recessed groove when it is in the pressed state.

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