Smoke alarm installation structure

Abstract

The utility model discloses a smoke alarm installation structure, which comprises a machine body, a fixed surface arranged on the machine body, an alarm inner cavity arranged in the machine body, a circuit board arranged in the alarm inner cavity, a first plugging cover for plugging the circuit board in the alarm inner cavity, a plugging plate and a contact part arranged on the plugging plate and electrically connected with the circuit board, a second plugging cover which is far away from the fixed surface and is matched with the first plugging cover is arranged on the machine body, the second plugging cover is in sliding connection with the machine body in the radial direction of the machine body, a battery is installed in the second plugging cover, a locking part is arranged between the second plugging cover and the plugging plate, and when the second plugging cover and the plugging plate are locked, the battery is electrically connected with the contact part. The second plugging cover is connected with the machine body in a sliding mode, the second plugging cover is convenient to disassemble, compared with a traditional mode that the whole smoke alarm needs to be disassembled during battery disassembly, the battery can be quickly disassembled, climbing operation of operators is facilitated, and a guarantee is provided for safety of the operators.

Description

TECHNICAL FIELD

[0001] The utility model relates to smoke alarm technology field, in particular, relate to smoke alarm mounting structure. BACKGROUND

[0002] Smoke alarm is through monitoring the concentration of smoke to realize fire prevention, mainly installed on the top wall of the house.

[0003] Smoke alarm adopts the mode of adhesive or bolt fixation, in order to make smoke alarm be installed at any position of the house, such as Figure 1 As shown, the detachable battery 100 is installed inside the smoke alarm, wherein the fixed surface 10 of the smoke alarm body 1 is attached to the wall, and the battery 100 is installed in the inner cavity of the body 1 from the fixed surface 10 position.

[0004] When the smoke alarm needs to replace the battery 100, since the fixed surface 10 is attached to the wall ceiling, the entire smoke alarm needs to be removed from the wall, and then the battery 100 can be replaced. Usually, a ladder is needed to remove the smoke alarm, and since the person is in a climbing operation state, the replacement of the smoke alarm battery 100 is more cumbersome, and the safety of the operator cannot be effectively guaranteed.

[0005] Therefore, how to design a smoke alarm with convenient battery replacement has become a technical problem to be solved by the personnel in the field. CONTENT OF THE UTILITY MODEL

[0006] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a smoke alarm mounting structure to solve the problem of inconvenient battery replacement in the smoke alarm.

[0007] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0008] The smoke alarm mounting structure comprises a body, a fixed surface is arranged on the body, an alarm inner cavity is arranged inside the body, a circuit board is arranged in the alarm inner cavity, a first blocking cover and a blocking plate are arranged to block the alarm inner cavity, a contact component electrically connected with the circuit board is arranged on the blocking plate, a second blocking cover is arranged on the body and away from the fixed surface and matched with the first blocking cover, the second blocking cover is slidably connected with the body along the radial direction of the body, a battery is arranged in the second blocking cover, a locking component is arranged between the second blocking cover and the blocking plate, and the battery is electrically connected with the contact component when the second blocking cover and the blocking plate are locked.

[0009] Further, the locking component comprises a locking block, a locking plate and a locking ball for locking the locking block and the locking plate, the locking block is fixedly installed on the blocking plate, the locking plate is fixedly installed on the inner wall of the second blocking cover, the locking ball is movably installed in the locking block, the locking plate is provided with a locking hole, when the second blocking cover is installed on the machine body, the locking plate is located on one side of the locking block, the locking ball is aligned with the locking hole, and the locking ball is partially inserted into the locking hole.

[0010] Further, the locking block is provided with a mounting hole, the side wall of the locking block is provided with a communication hole communicated with the mounting hole, the diameter of the communication hole is smaller than the diameter of the locking ball, the locking ball is movably installed in the mounting hole, and when the second blocking cover is installed on the machine body, the locking ball extends into the locking hole through the communication hole.

[0011] Further, the mounting hole is provided with a second spring, and the mounting hole is further provided with a blocking seat for blocking the end of the mounting hole, one end of the second spring is in abutment with the blocking seat, and the other end of the second spring is in abutment with the spherical surface of the locking ball.

[0012] Further, the inner wall of the second blocking cover is provided with two pairs of buckles arranged in a vertical manner, the end of the buckle is provided with a buckle and a tooth, the battery is installed between the two buckles, and the locking surface of the buckle and the tooth is in abutment with the top wall of the battery.

[0013] Further, the inner wall of the second blocking cover is provided with a mounting table, the two buckles are installed on the mounting table, the mounting table is provided with a mounting groove recessed inward, the mounting groove is provided with a first spring, one end of the first spring is in abutment with the bottom wall of the mounting groove, and the other end of the first spring extends out of the top wall of the mounting table, and when the battery is installed, the first spring is in abutment with the bottom wall of the battery and is compressed into the mounting groove.

[0014] Further, the mounting table is provided with two groups of limiting strips located at the front side and the rear side of the battery respectively, and when the battery is installed, the front wall and the rear wall of the battery are in abutment with the limiting strips on the same side respectively.

[0015] Further, the blocking plate is bent to form a compensation plate, the cross section of the combination of the blocking plate and the compensation plate is L-shaped, the machine body is provided with a positioning stop edge, the positioning stop edge is fixedly connected with the compensation plate through a positioning bolt, and the contact component is installed on the compensation plate.

[0016] Further, the contact component comprises a conductive contact, the conductive contact is installed on the compensation plate, the conductive contact is electrically connected with the circuit board, and when the second blocking cover is installed on the machine body, the battery is in abutment with the conductive contact.

[0017] Further, the contact component further comprises a guide pipe, a pushing plate and a third spring, the compensation plate is provided with a guide hole, the guide pipe is inserted into the guide hole and forms a sliding connection, the conductive contact is installed on one end of the guide pipe, the pushing plate is installed on the guide pipe away from the conductive contact, the third spring is sleeved outside the guide pipe, one end of the third spring is fixedly connected with the pushing plate, and the other end of the third spring is fixedly connected with the compensation plate.

[0018] Compared with the prior art, the utility model has the advantages that the second blocking cover is arranged away from the fixed side, the battery is fixed on the second blocking cover, the second blocking cover is connected with the machine body in a sliding mode, the second blocking cover is convenient to disassemble, compared with the traditional battery disassembly which needs to disassemble the whole smoke alarm, the battery can be quickly disassembled, the work personnel is convenient to work at high altitude, and the safety of the work personnel is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the prior art;

[0020] Figure 2 It is a structural schematic view of the utility model;

[0021] Figure 3 It is a first expansion schematic view of the utility model;

[0022] Figure 4 It is a first angle cross-sectional view of the utility model;

[0023] Figure 5 It is a second angle cross-sectional view of the utility model;

[0024] Figure 6 It is a second expansion schematic view of the utility model;

[0025] Figure 7 It is a third expansion schematic view of the utility model;

[0026] Figure 8 It is a fourth expansion schematic view of the utility model.

[0027] In the figure: 1. Body; 10. Fixing surface; 100. Battery; 101. Inner cavity of alarm; 102. Circuit board; 103. Blocking plate; 1031. Compensation plate; 1032. Guide hole; 104. First blocking cover; 105. Second blocking cover; 1051. Anti-slip groove; 1052. Mounting platform; 10521. Mounting slot; 1053. Buckle; 10531. Buckle and tooth; 1054. Limit 1. Bar; 1055. First spring; 1056. Locking plate; 10561. Locking hole; 106. Positioning rib; 107. Positioning bolt; 2. Locking component; 21. Locking block; 201. Mounting hole; 2011. Connecting hole; 22. Locking ball; 23. Second spring; 24. Blocking seat; 3. Contact component; 31. Push plate; 32. Guide tube; 33. Third spring; 34. Conductive contact. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] This embodiment provides a smoke alarm installation structure, which is mainly used to achieve rapid replacement of batteries.

[0030] like Figure 4 As shown, it includes a body 1, in which an alarm cavity 101 is provided, wherein a circuit board 102 is installed in the alarm cavity 101, and also includes a sealing plate 103 and a first sealing cover 104 for encapsulating the circuit board 102 in the alarm cavity 101, wherein a fixing surface 10 is provided on the side of the body 1 away from the first blocking cover 104. When the body 1 is installed, the fixing surface 10 of the body 1 needs to be fitted against the wall or ceiling to achieve the installation of the body 1.

[0031] The body 1 and the wall can be installed by gluing or fixing with bolts.

[0032] like Figure 2 、 Figure 3 and Figure 4 As shown, the first blocking cover 104 is a semicircular cover and is on the body 1, thereby achieving the packaging of the circuit board 102; in this embodiment, as shown Figure 2 and Figure 3 As shown, the second blocking cover 105 adapted to the first blocking cover 104 is further included, wherein the second blocking cover 105 slides along the radial direction of the body 1 so that the second blocking cover 105 can be installed on the body 1.

[0033] Specifically, such as Figure 2As shown, when the second blocking cover 105 is installed, the second blocking cover 105 is away from the fixing surface 10. When the body 1 is fixed on the wall, the second blocking cover 105 is away from the wall.

[0034] like Figure 4 As shown, the blocking plate 103 is provided with a contact component 3 electrically connected to the circuit board 102, and the second blocking cover 105 is installed with a battery 100. When the second blocking cover 105 is installed on the body 1 along the radial direction of the body 1, the battery 100 is electrically connected to the contact component 3 on the blocking plate 103, so that the battery 100 is used to provide power to the smoke alarm.

[0035] In order to realize the installation of the circuit board 102, the blocking plate 103 and the first blocking cover 104, in this embodiment, as shown in FIG. Figure 7 As shown, the circuit board 102 is placed horizontally in the alarm cavity 101, the blocking plate 103 is placed horizontally on the outside of the circuit board 102 and aligned with half of the circuit board 102, and the first blocking cover 104 is covered on the body 1, thereby blocking the other half of the circuit board 102, thereby preventing the circuit board 102 from falling off from the alarm cavity 101. It is worth noting that a compensation plate 1031 is also bent out from the blocking plate 103, and the cross-section formed by the blocking plate 103 and the compensation plate 1031 is L-shaped. The side wall of the compensation plate 1031 abuts against the inner wall of the first blocking cover 104, thereby achieving complete blocking of the circuit board 102.

[0036] In order to fix the blocking plate 103, in this embodiment, as shown in FIG. Figure 7 and Figure 8 As shown, the body 1 is provided with a positioning rib 106. After the blocking plate 103 is installed, the compensation plate 1031 abuts against the positioning rib 106. Then, the positioning bolts 107 are used to fix the positioning rib 106 and the compensation plate 1031, thereby achieving the installation of the blocking plate 103.

[0037] In order to enhance the stability of the second blocking cover 105 after installation, in this embodiment, as shown in FIG. Figure 5 and Figure 7 As shown, a locking component 2 is also included to securely connect the second blocking cover 105 to the compensation plate 1031 , thereby reducing the risk of the second blocking cover 105 falling off the body 1 .

[0038] Specifically, in this embodiment, Figure 5 and Figure 8As shown, the locking component 2 comprises a locking block 21, a locking plate 1056, and a locking ball 22 for locking the locking block 21 and the locking plate 1056, wherein one side wall of the locking block 21 is fixedly installed on the blocking plate 103, the other side wall of the locking block 21 is fixedly installed on the compensation plate 1031, the locking plate 1056 is fixedly installed on the inner wall of the second blocking cover 105, and the locking ball 22 is movably installed in the locking block 21. Figure 6 As shown, the locking plate 1056 is further provided with a locking hole 10561 for inserting the locking ball 22, and when the second blocking cover 105 is installed on the machine body 1 along the radial direction of the machine body 1, the locking hole 10561 is aligned with the locking ball 22, and the partial spherical surface of the locking ball 22 is inserted into the locking hole 10561, thereby locking the locking plate 1056 and the locking block 21.

[0039] In order to realize the installation of the locking ball 22, in the embodiment, as shown in Figure 5 and Figure 8 As shown, the locking block 21 is provided with a mounting hole 201, wherein the mounting hole 201 is a blind hole, the locking block 21 is further provided with a communication hole 2011 in communication with the mounting hole 201, wherein the diameter of the communication hole 2011 is smaller than the diameter of the locking ball 22, the locking ball 22 is installed in the mounting hole 201, and a blocking seat 24 is arranged at the end of the mounting hole 201 to block the end of the mounting hole 201. A second spring 23 is arranged in the mounting hole 201, one end of the second spring 23 abuts against the spherical surface of the locking ball 22, and the other end of the second spring 23 abuts against the blocking seat 24. Specifically, the second spring 23 is a compression spring.

[0040] Through the above arrangement, after the second blocking cover 105 is installed on the machine body 1, the communication hole 2011 is aligned with the locking hole 10561 on the locking plate 1056, the second spring 23 pushes the locking ball 22 to extend outward from the position of the communication hole 2011 and is inserted into the locking hole 10561, thereby locking the locking plate 1056 and the locking block 21, and improving the stability of the second blocking cover 105 after installation.

[0041] It is worth noting that, as shown in Figure 5 , Figure 6 and Figure 8 As shown, the locking block 21 and the locking plate 1056 are provided with two groups, and when the second blocking cover 105 is installed, the locking plate 1056 is located on one side of the locking block 21, the side wall of the locking plate 1056 abuts against the side wall of the locking block 21, so that the second blocking cover 105 stably slides along the radial direction of the machine body 1, and the stable installation of the second blocking cover 105 is realized.

[0042] In order to facilitate the disassembly of the second blocking cover 105, in the embodiment, as shown in Figure 2 As shown, the outer wall of the second blocking cover 105 is provided with an anti-skid pattern 1051.

[0043] Through the above arrangement, when the smoke alarm is installed on the top wall of the house, at this time the anti-skid lines 1051 on the second blocking cover 105 face downward, at this time the working personnel touches the anti-skid lines 1051 when climbing by the ladder, and applies a radial pushing force along the body 1 to the second blocking cover 105, at this time the spherical surface of the locking ball 22 moves relative to the edge of the locking hole 10561, so that the locking ball 22 moves out of the locking hole 10561, at this time the second blocking cover 105 is detached from the body 1, since the battery 100 is installed on the second blocking cover 105, at this time the battery 100 is disconnected from the contact component 3 in electrical connection with the movement of the second blocking cover 105.

[0044] Such battery 100 is detached, compared with detaching the entire smoke alarm from the wall, and then replacing the battery 100, the technical solution omits the step of detaching the smoke alarm, and reduces the difficulty of replacing the battery 100.

[0045] In the embodiment, as shown in Figure 4 and Figure 8 , the contact component 3 includes a conductive contact 34, wherein the conductive contact 34 is divided into a positive electrode and a negative electrode and is electrically connected with the circuit board 102, the conductive contact 34 is installed on the compensation plate 1031, when the second blocking cover 105 is covered on the body 1, the positive electrode and the negative electrode of the battery 100 respectively abut against the positive electrode and the negative electrode of the conductive contact 34, so as to realize the conduction of the circuit, and the battery 100 is used to provide power for the smoke alarm.

[0046] When the locking ball 22 slides out of the locking hole 10561, in order to assist the second blocking cover 105 to separate from the body 1, in the embodiment, as shown in Figure 4 and Figure 8 , the contact component 3 further includes a pushing plate 31, a guide pipe 32 and a third spring 33, the compensation plate 1031 is provided with a guide hole 1032, the guide pipe 32 is inserted into the guide hole 1032, the outer wall of the guide pipe 32 is in sliding connection with the inner wall of the guide hole 1032, the conductive contact 34 is installed on one end of the guide pipe 32 and extends to the outside of the guide pipe 32, the pushing plate 31 is installed on the other end of the guide pipe 32, the third spring 33 is sleeved on the outside of the guide pipe 32, one end of the third spring 33 is fixedly connected with the pushing plate 31, the other end of the third spring 33 is fixedly connected with the compensation plate 1031, it is worth noting that the third spring 33 is a tension spring.

[0047] Through the above arrangement, when the second blocking cover 105 is covered on the machine body 1, at this time, the electrode of the battery 100 is in abutment with the conductive contact 34 and pushes the guide pipe 32, so that the third spring 33 is stretched, at this time, the third spring 33 will apply a reverse thrust to the battery 100, at this time, the third spring 33 applies a thrust to the battery 100, which cannot make the locking ball 22 and the locking hole 10561 disengage; here, only the appropriate type of spring needs to be selected, and the selection of the third spring 33 can be adjusted by those skilled in the art, as long as the above-mentioned effect can be achieved.

[0048] In order to realize the installation of the battery 100, in the embodiment, as shown in Figure 3 , Figure 4 and Figure 6 , the inner wall of the second blocking cover 105 is provided with buckles 1053 for fixing the battery 100. Specifically, the buckles 1053 are provided with two and are vertically upward and located on both sides of the battery 100, and the top of the buckle 1053 is provided with a buckle and a tooth 10531, when the battery 100 is installed between the two buckles 1053, the buckle and the tooth 10531 are in abutment with the top wall of the battery 100, thereby realizing the fixation of the battery 100.

[0049] It is worth noting that the buckle and the tooth 10531 include a pushing surface and a locking surface, wherein the pushing surface is inclinedly arranged, and the locking surface is horizontally arranged, during the installation of the battery 100, the battery 100 is inserted vertically from top to bottom between the two buckles 1053, the side wall of the battery 100 first abuts against the pushing surface, thereby pushing the buckle 1053 to the two sides, as the battery 100 moves downward, when the top wall of the battery 100 is flush with the plane where the locking surface is located, the buckle 1053 resets, the locking surface abuts against the top wall of the battery 100, thereby locking the battery 100 between the two buckles 1053, realizing the installation of the battery 100.

[0050] Since the second blocking cover 105 is installed on the machine body 1 along the radial direction of the machine body 1, when the battery 100 abuts against the contact part 3, in order to prevent the battery 100 from moving along the radial direction of the machine body 1, in the embodiment, as shown in Figure 6 , the inner wall of the second blocking cover 105 is provided with limiting strips 1054 located on the front and rear sides of the battery 100, when the battery 100 is installed on the second blocking cover 105, the limiting strips 1054 abut against the side wall of the battery 100, thereby limiting the movement of the battery 100.

[0051] Specifically, in the embodiment, as shown in Figure 6 , the inner wall of the second blocking cover 105 is provided with an installation table 1052, wherein the two buckles 1053 and the two limiting strips 1054 are arranged on the installation table 1052.

[0052] In order to facilitate the removal of the battery 100 from between the buckles 1053, in this embodiment, as shown in FIG. Figure 6 As shown, the mounting platform 1052 is provided with a downwardly recessed mounting groove 10521, and a first spring 1055 is provided in the mounting groove 10521, wherein one end of the first spring 1055 is fixedly connected to the bottom wall of the mounting groove 10521, and the other end of the first spring 1055 extends out of the mounting platform 1052 and extends vertically upward, wherein the first spring 1055 is a compression spring. When the battery 100 is installed between the two buckles 1053 and locked by the buckle and the tooth 10531, the first spring 1055 is squeezed by the battery 100 and returned to the mounting groove 10521; when the battery 100 is removed, the buckles 1053 on both sides of the battery 100 are pushed outward with fingers, and the locking surface is disengaged from the top wall of the battery 100. At this time, the first spring 1055 bounces the battery 100 upward, thereby facilitating the removal of the battery 100.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. A smoke alarm mounting structure, comprising a body (1), a fixing surface (10) provided on the body (1), an alarm cavity (101) provided inside the body (1), a circuit board (102) installed in the alarm cavity (101), a first blocking cover (104) and a blocking plate (103) for blocking the circuit board (102) in the alarm cavity (101), characterized in that: A contact component (3) electrically connected to the circuit board (102) is mounted on the blocking plate (103); a second blocking cover (105) away from the fixed surface (10) and adapted to the first blocking cover (104) is mounted on the body (1); the second blocking cover (105) is slidably connected to the body (1) along the radial direction of the body (1); a battery (100) is mounted in the second blocking cover (105); a locking component (2) is provided between the second blocking cover (105) and the blocking plate (103); when the second blocking cover (105) and the blocking plate (103) are locked, the battery (100) is electrically connected to the contact component (3).

2. The smoke alarm mounting structure according to claim 1, characterized in that: The locking component (2) comprises a locking block (21), a locking plate (1056), and a locking ball (22) for locking the locking block (21) and the locking plate (1056). The locking block (21) is fixedly mounted on the blocking plate (103), the locking plate (1056) is fixedly mounted on the inner wall of the second blocking cover (105), the locking ball (22) is movably mounted in the locking block (21), and a locking hole (10561) is provided on the locking plate (1056). When the second blocking cover (105) is mounted on the machine body (1), the locking plate (1056) is located on one side of the locking block (21), the locking ball (22) is aligned with the locking hole (10561), and the locking ball (22) is partially inserted into the locking hole (10561).

3. The smoke alarm mounting structure according to claim 2, characterized in that: The locking block (21) is provided with a mounting hole (201), and a side wall of the locking block (21) is provided with a connecting hole (2011) connected to the mounting hole (201). The diameter of the connecting hole (2011) is smaller than the diameter of the locking ball (22). The locking ball (22) is movably installed in the mounting hole (201). When the second blocking cover (105) is installed on the body (1), the locking ball (22) partially passes through the connecting hole (2011) and extends into the locking hole (10561).

4. The smoke alarm mounting structure according to claim 3, characterized in that: The mounting hole (201) is provided with a second spring (23) and also includes a blocking seat (24) for blocking the end of the mounting hole (201); one end of the second spring (23) abuts against the blocking seat (24), and the other end of the second spring (23) abuts against the spherical surface of the locking ball (22).

5. The smoke alarm mounting structure according to claim 1, characterized in that: The inner wall of the second blocking cover (105) is provided with two oppositely arranged buckles (1053), and the ends of the buckles (1053) are provided with buckles and teeth (10531). The battery (100) is installed between the two buckles (1053), and the locking surfaces of the buckles and teeth (10531) abut against the top wall of the battery (100).

6. The smoke alarm mounting structure according to claim 5, characterized in that: The inner wall of the second blocking cover (105) is provided with a mounting platform (1052), and two buckles (1053) are installed on the mounting platform (1052). The mounting platform (1052) is provided with an inwardly recessed mounting groove (10521), and a first spring (1055) is provided in the mounting groove (10521). One end of the first spring (1055) abuts against the bottom wall of the mounting groove (10521), and the other end of the first spring (1055) extends out of the top wall of the mounting platform (1052). When the battery (100) is installed, the first spring (1055) abuts against the bottom wall of the battery (100) and is compressed into the mounting groove (10521).

7. The smoke alarm mounting structure according to claim 6, characterized in that: The mounting platform (1052) is provided with two groups of limiting bars (1054) respectively located on the front and rear sides of the battery (100). When the battery (100) is mounted, the front wall and the rear wall of the battery (100) respectively abut against the limiting bars (1054) on the same side.

8. The smoke alarm mounting structure according to claim 1, 4 or 7, characterized in that: A compensation plate (1031) is bent out from the blocking plate (103), and the combined cross-section of the blocking plate (103) and the compensation plate (1031) is L-shaped. A positioning rib (106) is provided on the machine body (1), and the positioning rib (106) and the compensation plate (1031) are fixedly connected via positioning bolts (107). The contact component (3) is mounted on the compensation plate (1031).

9. The smoke alarm mounting structure according to claim 8, characterized in that: The contact component (3) includes a conductive contact (34), which is mounted on the compensation plate (1031). The conductive contact (34) is electrically connected to the circuit board (102). When the second blocking cover (105) is mounted on the body (1), the battery (100) abuts against the conductive contact (34).

10. The smoke alarm mounting structure according to claim 9, characterized in that: The contact component (3) further comprises a guide tube (32), a push plate (31) and a third spring (33); a guide hole (1032) is provided on the compensation plate (1031); the guide tube (32) is inserted into the guide hole (1032) and forms a sliding connection; the conductive contact (34) is mounted on one end of the guide tube (32); the push plate (31) is mounted on the guide tube (32) on a side away from the conductive contact (34); the third spring (33) is sleeved on the outside of the guide tube (32); one end of the third spring (33) is fixedly connected to the push plate (31); and the other end of the third spring (33) is fixedly connected to the compensation plate (1031).

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