Electromagnetic relay with test button and test method thereof

Abstract

The invention discloses an electromagnetic relay with a test button and a test method thereof, the electromagnetic relay comprises a shell, a button and a magnetic circuit part located in the shell, and the button comprises a button main body and a push 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 the pressed state, and the structure is simpler.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, in particular to an electromagnetic relay with a test button and a testing method thereof. 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 adjustment, safety protection, and circuit conversion in the circuit.

[0003] Some existing electromagnetic relays include a test component, which allows commissioning personnel to verify the normal operation of the relay's load-side circuit. This test component typically consists of a button, a compression spring, and a locking component. When the button is pressed, it pushes the armature in the magnetic circuit, causing the armature to engage with the core. Simultaneously, the locking component holds the button in the pressed position, ensuring the armature and core remain engaged. When the button is released, the compression spring resets the button. This type of electromagnetic relay has the following drawbacks: The test component has numerous components, increasing component costs. Furthermore, during automated assembly, multiple compression spring components can be stacked together, making it difficult to load the compression spring onto the vibration plate, making automated assembly inconvenient. Once pressed, the button does not automatically remain in the pressed position, requiring the tester to maintain force, making testing inconvenient. While some relays can limit the position of the button after it is pressed, the limiter structure is relatively complex. Summary of the Invention

[0004] The present invention aims to solve the technical problems in the prior art and provides an electromagnetic relay with a test button and a test method thereof.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an electromagnetic relay with a test button and a testing method thereof, comprising a shell, a button, and a magnetic circuit part located in the shell, the button comprising a button body and a pushing part provided on the button body; the button body is movably installed in the mounting groove provided in the shell, the pushing part passes through the through hole provided on the bottom surface of the mounting groove and enters the shell, and when the button body is pressed, pushes the armature of the magnetic circuit part, so that the armature moves to the attracted position; the button body is provided with an elastic part for resetting the button and protruding laterally, and the elastic part presses 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 rotates in the 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 the pressed state.

[0006] Furthermore, the elastic portion includes a plurality of elastic rods, which are distributed along the circumference of the button body, and each elastic rod is tilted respectively; 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 press 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 exiting the installation groove; the limiting protrusion is a convex bud 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, and 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 relative 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 are in the shape of an elongated strip, and the long side of the elongated strip cooperates 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 recess is provided between the two straight surfaces of the button body and the head of the button body; a recess is provided on the top surface of the top cover, and the limiting hole is provided on the bottom surface of the recess; when the button body is in the pressed state, its head is retracted into the recess.

[0015] The present invention further provides a method for testing an electromagnetic relay, the electromagnetic relay comprising a housing and a magnetic circuit portion located within the housing, the housing being provided with a testing button; the testing method comprising the following steps:

[0016] Press the button to push the armature of the magnetic circuit part to the attracted position;

[0017] The button is rotated, and the elastic portion provided on the button is snapped into the corresponding limiting groove provided on the housing, so that the button remains in the pressed state;

[0018] When the test is completed, the button is rotated in the reverse direction to allow the elastic portion to exit the limiting groove, and the button is bounced upward and reset under the action of the elastic portion.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Because the button body of the present invention is provided with a laterally protruding elastic portion for resetting the button, and this elastic portion abuts against the bottom surface of the mounting slot, the present invention eliminates the need for an additional compression spring to reset the button. This not only reduces the number of parts and material costs, but also eliminates the need for automated loading of the compression spring when the present invention is automated, thereby facilitating automated assembly. Furthermore, because the button body is rotatable, the inner side surface of the mounting slot is provided with a limiting groove along the rotational path of the button body. When the button body is pressed, the elastic portion is rotated to enter or exit the limiting groove. Once the elastic portion enters the limiting groove, the button remains in the pressed state. This allows the present invention to limit the button in the pressed state, thereby facilitating testing by testers. Furthermore, the present invention directly utilizes the elastic portion in conjunction with the limiting groove to limit the button in the pressed state, resulting in a simpler structure and easier processing and molding.

[0021] 2. The pusher is an elastically deformable buffer rod that, on the one hand, cushions the pressure generated by the armature's contact and extrusion, and on the other hand, ensures reliable contact between the armature and the core of the magnetic circuit, thereby ensuring the accuracy of the test results. In particular, the pusher includes the inclined section, which simplifies its structure, saves material, and helps reduce costs.

[0022] 3. The inner side of the mounting groove is also provided with a limiting protrusion that restricts the elastic portion from exiting the mounting groove, which can limit the button and prevent it from being easily separated from the housing after assembly. In particular, the limiting protrusion is a convex bud structure, making it easier for the button to be installed in the mounting groove.

[0023] 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.

[0024] 5. The present invention 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.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the electromagnetic relay with a test button and the testing method thereof of the present invention are not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an exploded schematic diagram of the present invention (reflecting part);

[0027] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0028] Figure 3 Schematic diagram of the three-dimensional structure of the button of the present invention;

[0029] Figure 4 It is a partial enlarged schematic diagram of the top cover of the present invention;

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the present invention before the button is pressed;

[0031] Figure 6 is a cross-sectional view of the present invention before the button is pressed;

[0032] Figure 7 yes Figure 6 An enlarged schematic diagram of part B;

[0033] Figure 8 is a schematic diagram of the three-dimensional structure of the present invention after the button is pressed;

[0034] Figure 9is a cross-sectional view of the present invention after the button is pressed;

[0035] Figure 10 yes Figure 9 A magnified schematic diagram of part C;

[0036] Figure 11 is a schematic diagram of the three-dimensional structure of the present invention after the button is rotated;

[0037] Figure 12 This is a cross-sectional view of the present invention after the button is rotated Figure 1 ;

[0038] Figure 13 yes Figure 12 An enlarged schematic diagram of part D in the middle;

[0039] Figure 14 This is a cross-sectional view of the present invention after the button is rotated Figure 2 ;

[0040] 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

[0041] In the description of the present invention, the use of terms such as "upper," "lower," "left," "right," "inner," "outer," and "top / bottom" to indicate directions or positional relationships is based on the directions or positional relationships shown in the accompanying drawings and is intended solely to facilitate description of the present invention. They are not intended to indicate or imply that the device referred to must have, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the scope of protection of the present invention. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] 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 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 communication 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.

[0043] See Figures 1-14As shown, an electromagnetic relay with a test button according to the present invention comprises a housing 1, a button 2, and a magnetic circuit portion 4 and a contact portion 5 located within the housing 1. The button 2 comprises a button body 21 and a pusher portion 22 disposed within the button body 21. The button body 21 is movably mounted within a mounting slot 11 provided at the top of the housing 1. The pusher portion 22 extends through a through-hole provided on the bottom surface of the mounting slot 11 and into the housing 1. When the button body 21 is pressed, the pusher portion 22 pushes against the armature 41 of the magnetic circuit portion 4, causing the armature 41 to move to the engaged position. The button body 21 is integrally formed with a laterally protruding elastic portion for resetting the button 2. This elastic portion abuts against the bottom surface of the mounting slot 11. The button body 21 is rotatable. A stopper slot 12 is provided on the inner side of the mounting slot 11, along the rotational path of the button body 21. When the button body 21 is pressed, rotation causes the elastic portion to enter or exit the stopper slot 12. Once the elastic portion enters the stopper slot 12, the button 2 remains pressed, thus achieving self-locking.

[0044] In this embodiment, the outer top surface of the housing 1 is provided with a plurality of spaced protrusions 13, and the plurality of protrusions 13 cooperate with the top surface of the housing 1 to form a mounting groove 11. Specifically, Figure 2 As shown, there are two protrusions 13, arranged along the width of the housing 1. The two protrusions 13, which enclose the mounting slot 11, have one end facing different sides of the housing 1 in the longitudinal direction, and are suspended to form a retaining slot 12. The portion of the protrusion 13 corresponding to the inner side of the mounting slot 11 is an arcuate surface, and the arcuate surfaces of the two protrusions 13 are arranged opposite each other to provide clearance for the rotation of the button 2.

[0045] In this embodiment, the elastic portion includes a plurality of elastic rods 23 distributed along the circumference of the button body 21, and each elastic rod 23 is arranged at an angle. There are multiple limiting slots 12, each corresponding one-to-one with each of the elastic rods 23. Specifically, there are two elastic rods 23, located on opposite sides of the button body 21. The spacing between the ends of the two elastic rods 23 connected to the button body 21 is smaller than the spacing between the other ends of the two elastic rods 23 that abut against the bottom surface of the mounting slot 11. In other words, the two elastic rods 23 generally form a figure-eight shape.

[0046] In this embodiment, the inner side surface of the installation groove 11 is further provided with a limiting protrusion 14 that limits the elastic part from exiting the installation groove 11. The limiting protrusion 14 is preferably a convex bud structure, which makes it easier for the button 2 to be installed in the installation groove 11. This is because when the button 2 is installed in the installation groove 11, the elastic rod 23 of the button 2 will be blocked by the convex bud. However, since the convex bud 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 convex bud downward. Since the installation groove 11 is composed of the above-mentioned two protrusions 13 and the top surface of the housing 1, the limiting protrusion 14 is specifically located on the protrusion 13, and each protrusion 13 is respectively provided with a limiting protrusion 14. 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.

[0047] 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°.

[0048] The present invention also includes a top cover 3, which is connected to the top of the housing 1 and covers each of the bumps 13, making the overall appearance more concise and beautiful. The top cover 3 is provided with a limiting hole 31, which is connected to the mounting slot 11. When the button 2 is installed, the head of the button body 21 passes upward through the limiting hole 31. 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 pressure. The elastic portion (i.e., the two elastic rods 23) cannot pass through the limiting hole 31, thereby further limiting the position of the button 2 and preventing it from accidentally falling off.

[0049] The side surfaces of the button body 21 also include two straight surfaces facing each other. The aforementioned limiting hole 31 and / or mounting groove 11 are elongated. When the button 2 is assembled into the housing 1, the long sides of the elongated strip mate 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 elongated, but this is not limiting. In other embodiments, the limiting hole 31 or mounting groove 11 may also be elongated. This not only serves to limit the button 2 during operation, but also provides a foolproof function during assembly. Arc-shaped notches 311 are respectively provided in the middle of the two opposing inner sides of the limiting hole 31 to facilitate rotation of the button body. The two arc-shaped notches 311 are arranged opposite each other and, when the button body 21 is pressed and rotated, mate with the two arc-shaped surfaces on the side surfaces of the button body 21 facing each other. The arc-shaped surfaces and straight surfaces are respectively provided on 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. This recessed portion 211 is used to clear the corners and make way for easier rotation of the button. A recessed groove 32 is provided on the top surface of the top cover 3, and a retaining hole 31 is provided at the bottom of this groove 32. When pressed, the head of the button body 21 is retracted into this groove 32. The head of the button body 21 is elongated, but this is not the only limitation.

[0050] The electromagnetic relay with a test button of the present invention has an initial state as follows Figure 5-Figure 7 As shown, at this time, the two elastic rods 23 on the button body 21 are in the 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 part 22 is located above the armature 41, and the armature 41 is in the released state.

[0051] When the tester needs to check whether the load end circuit of the relay is normally switched, he presses the button 2 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. Figures 8-10 As shown. During this process, the push portion 22 deforms, which can buffer the pressure generated by the armature 41's resistance to extrusion, and on the other hand, ensure that the armature 41 is in reliable contact with 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 retracted into the recess 32 of the top cover 3, and the two elastic rods 23 are squeezed and deformed into a horizontal state, as shown. Figure 10 On this basis, the button 2 is rotated clockwise so that each elastic rod 23 enters the corresponding limit groove 12, thereby keeping the button 2 in the pressed state, as shown in FIG. Figure 11-14 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.

[0052] The electromagnetic relay with a test button of the present invention does not require additional compression springs or locking components to reset and lock the button 2. This not only reduces the number of parts and material costs, but also allows the present invention to eliminate the step of automatically loading the compression spring when using automated assembly, thereby facilitating automated assembly. Furthermore, because the button body 21 is rotatable, when pressed, the button body 21 rotates to cause the elastic portion to enter or exit the retaining groove 12 on the side of the mounting groove 11. Once the elastic portion enters the retaining groove 12, the button 2 remains in the pressed state, achieving self-locking, thereby facilitating testing by the tester. Therefore, the present invention does not require additional locking components, nor does it require a housing to cooperate with the locking components, which facilitates a narrow housing design, i.e., miniaturization. Furthermore, the present invention directly utilizes the elastic portion to cooperate with the retaining groove 12 to limit the button 2 in the pressed state, resulting in a simpler structure and easier processing and molding.

[0053] A method for testing an electromagnetic relay of the present invention comprises the following steps:

[0054] Press the button to push the armature of the magnetic circuit part to the attracted position;

[0055] The button is rotated, and the elastic portion provided on the button is snapped into the corresponding limiting groove provided on the housing, so that the button remains in the pressed state;

[0056] When the test is completed, the button is rotated in the reverse direction to allow the elastic portion to exit the limiting groove, and the button is bounced upward and reset under the action of the elastic portion.

[0057] Specifically, a testing method of an electromagnetic relay of the present invention can be implemented by using the electromagnetic relay of the present invention described above. Therefore, the detailed testing method is as described above and will not be repeated here.

[0058] The electromagnetic relay with a test button and the test method thereof of the present invention do 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 using the prior art.

[0059] The above embodiments are only used to further illustrate an electromagnetic relay with a test button and a test method thereof of the present invention, but the present invention 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 present invention fall within the scope of protection of the technical solution of the present invention.

Claims

1. An electromagnetic relay with a test button, comprising a housing, a button, and a magnetic circuit portion located within the housing, the button comprising a button body and a pusher disposed on the button body; the button body being movably mounted in a mounting slot provided in the housing, the pusher extending through a through hole provided in the bottom surface of the mounting slot and entering the housing. When the button body is pressed, the pusher pushes an armature of the magnetic circuit portion, causing the armature to move to an engaged position; and characterized in that: The button body is provided with an elastic part that is used to reset the button and protrudes laterally, and the elastic part presses 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 remains in the pressed state.

2. The electromagnetic relay with a test button according to claim 1, characterized in that: The elastic portion includes a plurality of elastic rods distributed along the circumference of the button body, and each elastic rod is tilted. There are a plurality of limiting grooves, and the limiting grooves correspond to the plurality of 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 for supporting 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 further provided with a limiting protrusion for limiting the elastic part from exiting the installation groove; the limiting protrusion is a convex bud 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, 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.

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. 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. 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 surfaces of the button body also include two straight surfaces set back to back; the limiting hole and / or the mounting groove are 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 recess is provided between the two straight surfaces of the button body and the head of the button body; a recess is provided on the top surface of the top cover, and the limiting hole is provided on the bottom surface of the recess; when the button body is in the pressed state, its head is retracted into the recess.

11. A method for testing an electromagnetic relay, the electromagnetic relay comprising a housing and a magnetic circuit portion located within the housing, the housing being provided with a testing button; characterized in that: The test method comprises the following steps: Press the button to push the armature of the magnetic circuit part to the attracted position; The button is rotated, and the elastic portion provided on the button is snapped into the corresponding limiting groove provided on the housing, so that the button remains in the pressed state; When the test is completed, the button is rotated in the reverse direction to allow the elastic portion to exit the limiting groove, and the button is bounced upward and reset under the action of the elastic portion.

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