Safety switch

Abstract

The utility model relates to the field of electrical elements, and relates to a safety switch, the safety switch comprises a socket and a plug-in, a channel between a first chamber and a second chamber of the socket is provided with an elastic protective cap, and the elastic protective cap is connected between a partition plate and a movable part, so that the channel between the first chamber and the second chamber can be sealed, and the safety of the plug-in can be improved. The switch is waterproof, dustproof and capable of protecting internal circuit connection, and can also reset and support the movable part together with the first spring, so that the elastic activity of the switch is improved, the problem of insufficient elasticity of the first spring is solved, and the disadvantage of failure caused by long-term work of the first spring can be effectively prevented; normal reset movement of the movable part is guaranteed, safety of the elevator switch is improved, the situations of insufficient elasticity and switch failure caused by shaking, door pushing and the like of an elevator are effectively avoided, and safe operation of the elevator is guaranteed.

Description

Technical Field

[0001] This application relates to the field of electrical components, and specifically to a safety switch. Background Technology

[0002] In the elevator industry, contact switches are commonly used to verify the position of elevator doors and the lock status. A contact switch consists of two parts: a plug and a socket, which are installed on the relevant components of the two elevator doors respectively. They disconnect or connect when the two elevator doors are open or closed relative to each other. Inserting the plug into the socket compresses a spring inside, causing the conductive terminals to make contact and thus conduct electricity. When the plug is removed from the socket, the spring's return movement disconnects the conductive terminals, thereby breaking the circuit.

[0003] In existing technology, the socket internal reset is achieved by simply setting a spring. However, the spring structure is simple and may lack elasticity, or the elasticity may fail due to long-term compression. In addition, the simple installation structure of the spring is prone to derailment or spring jamming due to elevator shaking and vibration, which directly causes the internal components of the socket to fail to reset properly, resulting in switch failure and certain safety hazards. Utility Model Content

[0004] To solve or at least partially solve the above-mentioned technical problems, this application provides a safety switch, including a socket and a plug, wherein the socket has a first chamber and a second chamber formed inside by a partition, and the first chamber and the second chamber are connected by a channel penetrating the partition;

[0005] The socket is internally equipped with:

[0006] The movable component extends from the first chamber through the channel to the second chamber;

[0007] An elastic contact element is disposed within the second cavity;

[0008] The first spring abuts against the movable member and the partition;

[0009] An elastic protective cap is connected between the partition and the movable part to seal the channel;

[0010] The plug is inserted into the socket to compress the movable member, which responds to the compression of the plug to compress the first spring and the elastic protective cap, and moves toward the elastic contact to contact the elastic contact to achieve conductivity;

[0011] The first spring and the elastic protective cap are used to provide elastic force for the reset of the moving part.

[0012] Optionally, one end of the elastic protective cap has a first snap-fit ​​portion, and the other end has a second snap-fit ​​portion;

[0013] The first snap-fit ​​part snaps into the slot on the movable part, and the second snap-fit ​​part snaps into the mounting slot on the partition.

[0014] Optionally, the elastic protective cap is frustum shaped, and the first snap-fit ​​portion and the second snap-fit ​​portion are respectively annular, with the diameter of the first snap-fit ​​portion being smaller than the diameter of the second snap-fit ​​portion.

[0015] Optionally, a circumferential sidewall of the elastic protective cap is formed between the first snap-fit ​​portion and the second snap-fit ​​portion, and the cross-section of the circumferential sidewall is stepped.

[0016] Optionally, the movable component includes:

[0017] A movable block, connected to the first spring, is used to abut against the plug-in;

[0018] A connecting component is fixedly connected to the movable block and connected to the elastic protective cap;

[0019] A contact bridge is disposed at the end of the connecting assembly away from the movable block. The contact bridge is made of conductive material and is used to contact the elastic contact to achieve circuit connection.

[0020] Optionally, the connecting component is an elastic telescopic component, which is capable of elastically expanding and contracting along its extension direction to elastically contract after the contact bridge comes into contact with the elastic contact member.

[0021] Optionally, the elastic telescopic assembly includes a movable rod and a sleeve rod. One end of the movable rod is connected to the movable block, and the other end extends into the sleeve rod. A second spring is provided inside the sleeve rod, abutting between the sleeve rod and the movable rod. The surface of the sleeve rod has a groove arranged along the telescopic direction of the second spring. The movable rod has a buckle, which is slidably limited within the groove. The end of the sleeve rod away from the movable rod is connected to the contact bridge.

[0022] Optionally, the elastic contact includes a first metal spring and a second metal spring, which are respectively disposed on both sides of the axis of the connecting assembly. The contact bridge realizes the circuit connection or disconnection between the first metal spring and the second metal spring by contacting or separating from the first metal spring and the second metal spring.

[0023] Optionally, the number of the first springs is at least two, and at least two of the first springs are arranged in pairs on both sides of the elastic protective cap.

[0024] Optionally, the socket has an opening slot communicating with the first chamber, at least a portion of the movable member is disposed within the opening slot, the insert is used to insert into the opening slot to compress the movable member, and the movable member resets its position as the insert disengages from the opening slot.

[0025] The safety switch provided in this application, by setting an elastic protective cap in the channel between the first and second chambers inside the socket, and connecting the elastic protective cap between the partition and the moving part, not only seals the channel between the first and second chambers, providing waterproof and dustproof protection and protecting the internal circuit connection, but also works with the first spring to provide a reset support for the moving part. This improves the elastic movement capability of the switch, compensates for the problem of insufficient elasticity of the first spring, effectively prevents the first spring from failing due to long-term operation, ensures the normal reset movement of the moving part, improves the safety of the elevator switch, and effectively avoids the situation of insufficient elasticity and switch failure caused by elevator shaking, door prying, etc., thus ensuring the safe operation of the elevator. Attached Figure Description

[0026] To more clearly illustrate the embodiments of this application, the relevant accompanying drawings will be briefly described below. It is understood that the drawings described below are only for illustrating some embodiments of this application, and those skilled in the art can obtain many other technical features and connections not mentioned herein based on these drawings.

[0027] Figure 1 This is a schematic diagram of the internal structure of the safety switch in this application;

[0028] Figure 2 This is a schematic diagram of the internal structure of the socket of the safety switch in this application;

[0029] Figure 3 This is a schematic diagram of the appearance of the safety switch in this application;

[0030] Figure 4 This is a schematic diagram of the structure of the elastic protective cap of the safety switch in this application;

[0031] Figure 5 This is a cross-sectional schematic diagram of one embodiment of the elastic protective cap of the safety switch of this application;

[0032] Figure 6 This is a schematic diagram of the moving part of the safety switch in this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Socket; 101. First chamber; 102. Second chamber; 103. Partition; 104. Opening groove; 105. Wiring hole; 110. Fixing bolt; 1031. Mounting groove;

[0035] 200. Movable block; 201. First spring; 202. Positioning post;

[0036] 300. Elastic telescopic component; 310. Movable rod; 311. Buckle; 320. Sleeve rod; 321. Slide groove; 330. Second spring; 340. Strong break lock hook; 350. Slot;

[0037] 400. Contact bridge;

[0038] 500, elastic contact element; 501, first metal spring; 502, second metal spring; 510, wiring bolt;

[0039] 600. Protective cap; 601. First snap-fit ​​part; 602. Second snap-fit ​​part; 603. Circumferential sidewall;

[0040] 700. Sealing gasket;

[0041] 800, Protective plug;

[0042] 900, plug; 901, mounting base; 902, connector. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0045] This embodiment provides a safety switch that can be used in the control circuit of an elevator door to cooperate with the starter to verify the door's position and lock status.

[0046] like Figure 1As shown, the switch has a socket 100 and a plug 900. The socket 100 has a movable block 200 inside. The movable block 200 is elastically connected to the internal structure of the socket 100 and is connected to the outside of the socket 100. The movable block 200 can be contracted by squeezing it from the outside of the socket 100. When the squeezing is released, the movable block 200 will automatically return to its original position due to its elasticity.

[0047] The socket 100 has a partition 103 inside, which divides the interior of the socket 100 into a first chamber 101 and a second chamber 102 arranged vertically. The surface of the partition 103 has a channel that connects the first chamber 101 and the second chamber 102.

[0048] The socket 100 has a movable part inside, which extends from the first chamber 101 through the channel to the second chamber 102. The first spring 201 abuts between the movable part and the partition 103. The second chamber 102 has an elastic contact 500.

[0049] In this embodiment, an elastic protective cap 600 is provided at the channel of the partition 103. The elastic protective cap 600 is connected between the partition 103 and the movable part to seal the channel.

[0050] The plug 900 is inserted into the socket 100 to compress the movable member. The movable member responds to the compression of the plug 900 to compress the first spring 201 and the elastic protective cap 600, and moves toward the elastic contact 500 to contact the elastic contact 500 to achieve conductivity. The first spring 201 and the elastic protective cap 600 are used to provide elastic force for the reset of the movable member.

[0051] The safety switch provided in this embodiment uses an elastic protective cap 600 installed in the channel between the first chamber 101 and the second chamber 102 inside the socket 100. The elastic protective cap 600 is connected between the partition 103 and the movable part. It can not only seal the channel between the first chamber 101 and the second chamber 102, thus providing waterproof and dustproof protection and protecting the internal circuit connection, but also work with the first spring 201 to provide a reset support for the movable part. This improves the elastic movement capability of the switch, compensates for the insufficient elasticity of the first spring 201, effectively prevents the first spring 201 from failing due to long-term operation, ensures the normal reset movement of the movable part, improves the safety of the elevator switch, and effectively avoids the situation of insufficient elasticity and switch failure caused by the elevator being shaken or the door being pried open, thus ensuring the safe operation of the elevator.

[0052] like Figure 4As shown, in this embodiment, one end of the elastic protective cap 600 has a first snap-fit ​​portion 601 and the other end has a second snap-fit ​​portion 602; the first snap-fit ​​portion 601 snaps into the slot 350 on the movable part, and the second snap-fit ​​portion 602 snaps into the mounting slot 1031 on the partition 103, thereby ensuring that the elastic protective cap 600 is stably connected and can be squeezed to generate elastic force.

[0053] like Figure 4 As shown, in one embodiment, the elastic protective cap 600 is frustum-shaped, and the first locking portion 601 and the second locking portion 602 are respectively annular, with the diameter of the first locking portion 601 being smaller than the diameter of the second locking portion 602. The frustum-shaped elastic protective cap 600 facilitates uniform force distribution and ensures elastic stability.

[0054] like Figure 5 As shown, in one embodiment, a circumferential sidewall 603 of the elastic protective cap 600 is formed between the first snap-fit ​​portion 601 and the second snap-fit ​​portion 602. The cross-section of the circumferential sidewall 603 is stepped, which facilitates the elastic contraction of the elastic protective cap 600 to provide better elastic force.

[0055] The movable components in this embodiment include a movable block 200, a connecting assembly, and a contact bridge 400. The movable block 200 is connected to the first spring 201 and abuts against the plug 900. The connecting assembly is fixedly connected to the movable block 200 and connected to the elastic protective cap 600. The contact bridge 400 is located at the end of the connecting assembly furthest from the movable block 200. The contact bridge 400 is made of a conductive material, as is the elastic contact 500. The contact bridge 400 contacts the elastic contact 500 to establish circuit connection. The elastic contact 500 is connected to the internal structure of the socket 100. The elastic contact 500 itself is elastic, capable of bending or deforming when compressed, thus possessing elastic potential energy. When the compression is released, the elastic contact 500 will return to its original position due to its elastic potential energy.

[0056] The elastic contact 500 can be a metal sheet or an elastic element such as a spring, which can automatically reset after compression.

[0057] The connecting component can be a rod-shaped fixed structure used to transmit the thrust of the movable block 200, or it can be an elastic telescopic component 300 that can elastically extend and retract along its extension direction so as to elastically contract after the contact bridge 400 comes into contact with the elastic contact member 500.

[0058] One end of the elastic telescopic component 300 is connected to the movable block 200, and the other end is provided with a contact bridge 400. When the movable block 200 is compressed, the elastic telescopic component 300 also moves with the movable block 200. In this embodiment, the elastic telescopic component 300 has an elastic telescopic function along its axial direction. When both ends of the elastic telescopic component 300 are compressed, the elastic telescopic component 300 can elastically contract. When the compression at at least one end is released, the elastic telescopic component 300 will elastically reset.

[0059] In this embodiment, when the movable block 200 is pressed by the plug 900, it can drive the contact bridge 400 to move towards the elastic contact member 500. When the contact bridge 400 contacts the elastic contact member 500, it compresses the elastic contact member 500 to an elastically deformed state. The elastic telescopic component 300 can be in an elastically contracted state after the contact bridge 400 contacts the elastic contact member 500. The compression of the movable block 200 causes both the elastic contact member 500 and the elastic telescopic component 300 to possess elastic potential energy when the contact bridge 400 contacts the elastic contact member 500.

[0060] After the compression of the movable block 200 is released, the movable block 200 will reset due to the elastic force. During the reset of the movable block 200, the movement of the movable block 200 causes the elastic telescopic component 300 to move along its axial direction. As the pressure on the elastic telescopic component 300 in the axial direction decreases, the elastic potential energy of the elastic telescopic component 300 is released, thereby the elastic telescopic component 300 resets. The reset of the elastic telescopic component 300 then pushes the contact bridge 400 toward the elastic contact member 500, which helps the contact bridge 400 and the elastic contact member 500 to maintain contact.

[0061] Similarly, as the squeezing pressure of the movable block 200 decreases and the elastic telescopic component 300 resets, the pressure exerted by the contact bridge 400 on the elastic contact 500 gradually decreases. At this time, the elastic potential energy of the elastic contact 500 is released, and the elastic contact 500 begins to reset from the elastic deformation state. The elastic contact 500 moves towards the contact bridge 400, which helps the contact bridge 400 and the elastic contact 500 maintain contact.

[0062] In this embodiment, the travel distance of the movable block 200 is greater than that of the elastic telescopic component 300 and the elastic contact 500, so that the travel distances of the elastic telescopic component 300 and the elastic contact 500 end before the travel distance of the movable block 200 ends. Thus, after the travel distances of the elastic telescopic component 300 and the elastic contact 500 have both ended, the movable block 200 continues to reset, causing the contact bridge 400 to separate from the elastic contact 500, thereby achieving the disconnection effect of the switch.

[0063] In this embodiment, both the contact bridge 400 and the elastic contact 500 are made of conductive materials. The contact bridge 400 and the elastic contact 500 are respectively connected to wires. When the contact bridge 400 and the elastic contact 500 are in contact, the circuit of the switch is connected. When the contact bridge 400 and the elastic contact 500 are separated, the circuit of the switch is disconnected.

[0064] Of course, in some embodiments, the elastic contact 500 can be two unit components, which are respectively connected to wires. The contact bridge 400 can move to contact or disconnect with the two unit components at the same time, thereby realizing the circuit connection or disconnection between the two unit components.

[0065] In this embodiment, during the reset of the movable block 200, the reset of the elastic telescopic component 300 and the elastic contact 500 compensates for the travel of the contact bridge 400 and the elastic contact 500 in the separation direction. The dual reset travel of the elastic telescopic component 300 and the elastic contact 500 provides double protection against separation of the contact bridge 400 and the elastic contact 500. When the switch vibrates, the elastic telescopic component 300 and the elastic contact 500 reset along with the switch, ensuring that the contact bridge 400 and the elastic contact 500 remain in contact and do not disconnect. This effectively avoids situations where the elevator vibrates, the door opens, or the switch easily disconnects due to short travel, thus ensuring the safe operation of the elevator.

[0066] like Figure 1 and Figure 2 As shown, in this embodiment, the first spring 201 is arranged in pairs on both sides of the elastic telescopic component 300 and the elastic protective cap 600, and is consistent with the telescopic direction of the elastic telescopic component 300, and is used to drive the reset activity of the movable block 200.

[0067] Specifically, such as Figure 6 As shown, the movable block 200 has two positioning posts 202. One end of the first spring 201 is sleeved on the positioning post 202 to prevent it from detaching from the movable block 200. The other end of the first spring 201 can abut against the partition plate 103. The partition plate 103 can be provided with a structure similar to the positioning post 202 or a spring mounting groove to better fix the first spring 201.

[0068] like Figure 6 As shown, in one embodiment, the elastic telescopic component 300 includes a movable rod 310 and a sleeve rod 320. One end of the movable rod 310 is connected to the movable block 200, and the other end extends into the sleeve rod 320. A second spring 330 is provided in the sleeve rod 320, which abuts against the sleeve rod 320 and the movable rod 310. The second spring 330 is the elastic force source that provides the elastic telescopic component 300 with the reset movement.

[0069] The sleeve rod 320 has a groove 321 arranged along the extension direction of the second spring 330. The movable rod 310 has a buckle 311, which is slidably limited within the groove 321. The limiting sliding cooperation between the buckle 311 and the groove 321 limits the sliding distance of the movable rod 310 and the sleeve rod 320 and prevents relative rotation between them. When the second spring 330 is at its maximum extension distance, the buckle 311 abuts against the edge of the groove 321. At this time, the movable rod 310 can pull the sleeve rod 320 to move, preventing the movable rod 310 from disengaging from the sleeve rod 320.

[0070] The contact bridge 400 is located at the end of the sleeve 320 away from the movable rod 310, so as to be close to the elastic contact 500.

[0071] like Figure 6 As shown, in this embodiment, the slot 350 is located between the movable rod 310 and the movable block 200. The slot 350 is annular and corresponds to the annular first engaging part 601, so that the first engaging part 601 can be elastically engaged into the slot 350. When the movable rod 310 and the movable block 200 move up and down, the slot 350 locks the first engaging part 601 to prevent the first engaging part 601 from falling off.

[0072] In one embodiment, the elastic contact 500 includes a first metal spring 501 and a second metal spring 502. The first metal spring 501 and the second metal spring 502 are respectively disposed on both sides of the axis of the elastic telescopic component 300. When the contact bridge 400 contacts and applies pressure to the first metal spring 501 and the second metal spring 502, it can ensure the force balance of the elastic telescopic component 300, reduce the movement resistance of the elastic telescopic component 300, and prevent the elastic telescopic component 300 from deviating.

[0073] The contact bridge 400 connects or disconnects the circuit between the first metal spring 501 and the second metal spring 502 by contacting or separating from the first metal spring 501 and the second metal spring 502.

[0074] like Figure 1 and Figure 2 As shown, the first metal spring 501 and the second metal spring 502 are respectively connected to the wiring bolt 510. The socket 100 is provided with wiring holes 105 corresponding to the wiring bolts 510. External wires are installed by extending into the wiring bolts 510 through the wiring holes 105.

[0075] like Figure 1As shown, in one embodiment, one wiring bolt 510 can correspond to two wiring holes 105 on the socket 100. That is, wiring holes 105 are respectively provided on two sides of a corner of the socket 100. In actual use, one of the wiring holes 105 can be selected for wiring according to the installation orientation requirements, which improves the convenience of switch wiring.

[0076] like Figure 1 and Figure 2 As shown, a sealing gasket 700 is further provided at the wiring hole 105. The sealing gasket 700 seals the second chamber 102 and serves to prevent dust and water.

[0077] The socket 100 is also provided with a through hole on the surface corresponding to the wiring bolt 510, through which the wiring bolt 510 can be installed and removed. A protective plug 800 is provided in the through hole. After the wiring bolt 510 is installed and fixed, the protective plug 800 blocks the through hole and seals the second chamber 102.

[0078] like Figure 1 and Figure 2 As shown, the socket 100 is provided with two fixing bolts 110, which are used to install the socket 100 in the corresponding installation position on the elevator door to realize the installation and fixing of the switch.

[0079] In this embodiment, the top of the first chamber 101 is connected to the outside so that the movable block 200 can be exposed to the outside and can be squeezed and moved by external objects.

[0080] In this embodiment, the socket 100 is installed on one elevator door, and the plug 900 is installed on another elevator door. When the two elevator doors are closed, the plug 900 extends into the socket 100 to press the movable block 200, thereby realizing the movement of the movable block 200 as described above.

[0081] like Figure 3 As shown, the socket 100 has an opening slot 104, which communicates with the first chamber 101. The movable block 200 can be said to be disposed in the opening slot 104 or in the first chamber 101. It communicates with the outside through the opening slot 104. The plug 900 moves with the elevator door to insert into the opening slot 104 to squeeze the movable block 200. The movable block 200 resets its movement as the plug 900 disengages from the opening slot 104.

[0082] like Figure 3As shown, the plug 900 consists of a mounting base 901 and a plug 902. The mounting base 901 is used to fix it to the elevator door. One end of the plug 902 is fixed to the mounting base 901, and the other end extends in the direction of the socket 100. The end of the plug 902 has a section of abutting part, and the movable block 200 also has a section of abutting part. When the two come into contact, they abut against each other to transmit the thrust of the plug 900.

[0083] In this embodiment, certain requirements can be placed on the distance by which the plug 902 extends beyond the mounting base 901. This distance should satisfy the travel required for the elastic telescopic component 300 to move; that is, when the plug 902 presses against the movable block 200, it ensures that the elastic telescopic component 300 and the elastic contact 500 can reach the required travel. When the distance the plug 902 extends meets the travel required by the movable block 200, the mounting base 901 abuts against the socket 100, preventing the plug 902 from extending further and thus avoiding the plug 902 being inserted too deeply and damaging the internal structure of the switch.

[0084] like Figure 2 As shown, the elastic telescopic component 300 in this embodiment is also provided with a strong break lock hook 340, which engages with the plug 902 when the plug 902 is inserted. When the internal spring of the switch fails and the components cannot achieve the reset function, the plug 902 can be pulled out. The plug 902 drives the strong break lock hook 340 to realize the spring reset function, thereby manually disconnecting the switch and ensuring safety.

[0085] Since the use of the strong break lock hook 340 is common knowledge in the field, the specific structure and principle of the strong break lock hook 340 will not be described in detail in this embodiment.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A safety switch, characterized in that Includes a socket (100) and a plug (900). The socket (100) has a first chamber (101) and a second chamber (102) formed inside by a partition (103). The first chamber (101) and the second chamber (102) are connected by a channel passing through the partition (103). The socket (100) is internally provided with: The movable component extends from the first chamber (101) through the channel to the second chamber (102). An elastic contact element (500) is disposed within the second chamber (102); The first spring (201) abuts against the movable member and the partition (103); An elastic protective cap (600) is connected between the partition (103) and the movable part to seal the channel; The plug (900) is inserted into the socket (100) to compress the movable member, which responds to the compression of the plug (900) to compress the first spring (201) and the elastic protective cap (600) and moves toward the elastic contact (500) to contact the elastic contact (500) to achieve conductivity; The first spring (201) and the elastic protective cap (600) are used to provide elastic force for the reset of the moving part.

2. The safety switch of claim 1, wherein, The elastic protective cap (600) has a first snap-fit ​​portion (601) at one end and a second snap-fit ​​portion (602) at the other end. The first snap-fit ​​part (601) snaps into the slot (350) on the movable part, and the second snap-fit ​​part (602) snaps into the mounting slot (1031) on the partition (103).

3. The safety switch of claim 2, wherein, The elastic protective cap (600) is in the shape of a frustum, and the first snap-fit ​​part (601) and the second snap-fit ​​part (602) are respectively annular, with the diameter of the first snap-fit ​​part (601) being smaller than the diameter of the second snap-fit ​​part (602).

4. The safety switch of claim 2, wherein, A circumferential sidewall (603) of the elastic protective cap (600) is formed between the first snap-fit ​​portion (601) and the second snap-fit ​​portion (602), and the cross-section of the circumferential sidewall (603) is stepped.

5. The safety switch according to any one of claims 1-4, characterized in that, The movable component includes: The movable block (200) is connected to the first spring (201) and is used to abut against the plug (900). A connecting component is fixedly connected to the movable block (200) and connected to the elastic protective cap (600); A contact bridge (400) is disposed at one end of the connecting assembly away from the movable block (200). The contact bridge (400) is made of conductive material and is used to contact the elastic contact (500) to achieve circuit connection.

6. The safety switch of claim 5, wherein, The connecting component is an elastic telescopic component (300), which is capable of elastically telescopically extending and retracting along its extension direction, so as to elastically contract after the contact bridge (400) comes into contact with the elastic contact member (500).

7. The safety switch of claim 6, wherein, The elastic telescopic assembly (300) includes a movable rod (310) and a sleeve rod (320). One end of the movable rod (310) is connected to the movable block (200), and the other end extends into the sleeve rod (320). A second spring (330) is provided inside the sleeve rod (320) and abuts against the sleeve rod (320) and the movable rod (310). The surface of the sleeve rod (320) has a groove (321) arranged along the telescopic direction of the second spring (330). The movable rod (310) has a buckle (311), which is slidably limited within the groove (321). The end of the sleeve rod (320) away from the movable rod (310) is connected to the contact bridge (400).

8. The safety switch of claim 5, wherein, The elastic contact (500) includes a first metal spring (501) and a second metal spring (502). The first metal spring (501) and the second metal spring (502) are respectively disposed on both sides of the axis of the connecting assembly. The contact bridge (400) realizes the circuit connection or disconnection between the first metal spring (501) and the second metal spring (502) by contacting or separating from the first metal spring (501) and the second metal spring (502).

9. The safety switch according to any one of claims 1-4, characterized in that, The number of the first spring (201) is at least two, and at least two of the first springs (201) are arranged in pairs on both sides of the elastic protective cap (600).

10. The safety switch according to any one of claims 1-4, characterized in that, The socket (100) has an opening slot (104) communicating with the first chamber (101), at least a portion of the movable member is disposed within the opening slot (104), and the plug (900) is used to insert into the opening slot (104) to compress the movable member, and the movable member resets its movement as the plug (900) disengages from the opening slot (104).

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