Simple inductor with junction box

Abstract

The invention relates to the technical field of inductors, and discloses a simple inductor with a junction box, the simple inductor comprises a supporting mechanism, the supporting mechanism comprises a connecting box, the top of the connecting box is rotatably connected with a box cover through a hinge, and the outer wall of the connecting box is fixedly connected with a first connecting piece; a first sliding groove is formed in the inner wall of the side, away from the first connecting piece, of the connecting box, a fixing frame is fixedly connected to the inner wall of the connecting box, a second sliding groove is formed in the inner wall of the bottom of the connecting box, and a first fixing shaft is fixedly connected to the side, close to the second sliding groove, of the connecting box. The clamping mechanism can fix the inductance element in the middle, and meanwhile, the adjusting mechanism ensures that the contact piece is in stable contact with the connecting line of the inductance element, so that the risk of contact breaking of the inductance element in a vibration environment is effectively reduced, and the working reliability of the connection box is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inductors, and in particular to a simple inductor with a junction box. Background Art

[0002] As one of the basic components in electronic circuits, the inductor's main function is to store and release magnetic field energy. Its core characteristic is to hinder the change of current. It is made of wound wire, usually in the form of a coil. When current passes through, it generates a magnetic field, thereby achieving filtering, energy storage, tuning and other functions. Inductors are widely used in power supply, communication, signal processing and other fields.

[0003] The patent application with application number CN202023194808.8 discloses an inductor with a junction box, which includes an inductor body and a junction box. The inductor body includes an inductor body and a junction box. The inductor body includes a frame, a magnetic rod, a winding, a sealing sleeve and a lead cover. The magnetic rod is arranged inside the frame, the winding is wound around the circumferential outer wall of the frame, the sealing sleeve is arranged on the circumferential outer side of the frame and the winding, and the two lead covers are respectively covered at the axial ends of the frame and are electrically connected to the two ends of the winding.

[0004] In summary, when installing an inductor inside a junction box, if the electrical connection is tilted or not fully in place, poor contact between the inductor and the junction box may result. Furthermore, when the junction box is exposed to vibration, the contact area between the inductor and the junction box connector may shift, causing contact failure and ultimately malfunctioning of the junction box with the inductor.

[0005] To this end, we propose a simple inductor with a junction box. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a simple inductor with a junction box to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a simplified inductor with a junction box, comprising a support mechanism, the support mechanism including a junction box, the top of the junction box being rotatably connected to a box cover via a hinge, the outer wall of the junction box being fixedly connected to a first connecting piece, the inner wall of the junction box being provided with a first sliding groove on a side away from the first connecting piece, the inner wall of the junction box being fixedly connected to a fixing bracket, the bottom inner wall of the junction box being provided with a second sliding groove, the side of the junction box adjacent to the second sliding groove being fixedly connected to a first fixed shaft, and further comprising: The adjusting mechanism includes a second connecting piece arranged on the outside of the connecting box, the second connecting piece is fixedly connected to a connecting shaft on the outer wall of one side close to the connecting box, the connecting shaft passes through the connecting box at one end away from the second connecting piece and is fixedly connected to the connecting frame, the connecting frame is fixedly connected to the outer wall of one side close to the second connecting piece at one end, the first spring is fixedly connected to the connecting box at one end away from the connecting frame, a third sliding groove is provided on the outer surface of the connecting frame on the side close to the connecting shaft, a fixed block is fixedly connected to the outer wall of the connecting frame on the side close to the connecting shaft, a contact piece is provided inside the fixed block, and an opening is provided on the side of the connecting frame close to the contact piece, and the first spring elastically resets the second connecting piece to its initial position after movement.

[0008] According to the above technical solution, the inner wall of one end of the connecting frame away from the connecting shaft is connected to the first rotating rod through a rotating shaft, and the end of the first rotating rod away from the connecting frame is connected to the first sliding block through a rotating shaft. The first sliding block is slidably connected inside the first sliding groove, and the first sliding groove limits the sliding distance of the first sliding block.

[0009] According to the above technical solution, the inner wall of the fixed block is fixedly connected to the second fixed shaft, the contact piece is slidably sleeved on the outer surface of the second fixed shaft, the outer wall of the contact piece is fixedly connected to the second spring, and the end of the second spring away from the contact piece is fixedly connected to the fixed block. The second spring acts elastically to restore the contact piece to its initial position after movement.

[0010] According to the above technical solution, a clamping mechanism is provided at one end of the connecting frame away from the second connecting piece; the clamping mechanism includes a force-bearing frame arranged inside the connecting box, an inductor element is placed on the top of the force-bearing frame, and a fixing rod is fixedly connected to the outer wall of the force-bearing frame on one side close to the connecting frame, and the outer surface of the end of the fixing rod away from the force-bearing frame is slidably connected to the inner wall of the third sliding groove, and an auxiliary component is provided at the bottom of the force-bearing frame, and the connecting frame squeezes the fixing rod through the third sliding groove.

[0011] According to the above technical solution, the inner wall of the force-bearing frame is rotatably connected to the second rotating rod via a rotating shaft, the end of the second rotating rod away from the force-bearing frame is rotatably connected to the flip rod via a rotating shaft, the end of the flip rod away from the second rotating rod is rotatably connected to the fixed frame, and the force-bearing frame drives the flip rod to rotate around the fixed point through the second rotating rod.

[0012] According to the above technical solution, the end of the flip rod away from the fixed frame is rotatably connected to the clamping plate through a rotating shaft, and the outer wall of the clamping plate close to the flip rod is fixedly connected to the first elastic component. The end of the first elastic component away from the clamping plate is fixedly connected to the flip rod. The first elastic component adjusts the clamping angle of the clamping plate according to the outer surface shape of the inductor element through elastic action.

[0013] According to the above technical solution, the auxiliary component includes a first auxiliary rod rotatably connected to the inner wall of the force-bearing frame, the end of the first auxiliary rod away from the force-bearing frame is rotatably connected to a second sliding block through a rotating shaft, the second sliding block is slidably connected inside the second sliding groove, and the force-bearing frame squeezes the second sliding block through the first auxiliary rod.

[0014] According to the above technical solution, the inner wall of the end of the second sliding block away from the first auxiliary rod is rotatably connected to the second auxiliary rod through a rotating shaft, and the outer wall of the end of the second auxiliary rod away from the second sliding block is rotatably connected to the third sliding block through a rotating shaft. The third sliding block is movably sleeved on the outer surface of the first fixed shaft, and the outer wall of the end of the third sliding block away from the second auxiliary rod is fixedly connected to the second elastic component. The end of the second elastic component away from the third sliding block is fixedly connected to the connecting box, and the first fixed shaft limits the sliding distance of the third sliding block.

[0015] Compared with the prior art, the present invention provides a simple inductor with a junction box, which has the following beneficial effects: 1. The present invention provides a simple inductor with a junction box. When the inductor element is installed inside the junction box, the clamping mechanism can fix it in the center. At the same time, the adjustment mechanism ensures that the contact piece and the connecting wire of the inductor element maintain stable contact, thereby effectively reducing the risk of disconnection of the inductor element in a vibration environment, thereby improving the working reliability of the junction box.

[0016] 2. The present invention provides an adjustment mechanism, and the second spring squeezes the connecting wire at one end of the inductor element through the contact piece, thereby ensuring that the connecting wire of the inductor element is in full contact with the contact piece, thereby preventing the inductor element from being disconnected when the connection box is in a vibrating environment.

[0017] 3. The present invention provides a clamping mechanism. When the inductor element is installed on the top of the force-bearing frame, pressure is applied to it after the box cover is closed, causing the force-bearing frame to slide toward the bottom of the connection box. The force-bearing frame drives the flip rod to flip toward the inductor element through the second rotating rod. The clamping plate on the top of the flip rod then clamps the outer surfaces of both ends of the inductor element, thereby enhancing the stability of the connection box in a vibration environment.

[0018] 4. The present invention sets up an auxiliary component. During the process of the force-bearing frame sliding toward the bottom of the connection box, the first auxiliary rod applies pressure to the second sliding block, forcing the second sliding block to slide along the inner wall of the second sliding groove. The second sliding block pushes the third sliding block to move along the outer surface of the first fixed axis through the second auxiliary rod. At the same time, the third sliding block applies a balanced pulling force to the second sliding block through the second auxiliary rods on both sides, thereby ensuring that the force-bearing frame always keeps sliding horizontally to avoid offset or jamming, thereby accurately controlling the installation position of the inductor element and ensuring that it is fully installed in place. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 It is a schematic structural diagram of the support mechanism of the present invention; Figure 3 This is a schematic diagram of the overall front cross-sectional structure of the present invention Figure 1 ; Figure 4 This is a schematic diagram of the overall front cross-sectional structure of the present invention Figure 2 ; Figure 5 It is a schematic structural diagram of the adjusting mechanism and the clamping mechanism of the present invention; Figure 6 It is a schematic structural diagram of the regulating mechanism of the present invention; Figure 7 It is a schematic structural diagram of the clamping mechanism of the present invention; Figure 8 This is a schematic diagram of the auxiliary component structure of the present invention; Figure 9 For the present invention Figure 4 Schematic diagram of the enlarged structure of A in the figure.

[0020] In the figure: 1. Support mechanism; 101. Connecting box; 102. First sliding groove; 103. Fixing frame; 104. First fixed shaft; 105. Second sliding groove; 106. Box cover; 107. First connecting piece; 2. Adjusting mechanism; 201. Second connecting piece; 202. Connecting shaft; 203. Connecting frame; 204. Third sliding groove; 205. Opening; 206. First rotating rod; 207. First sliding block; 208. First spring; 209. Fixing block ; 210, second fixed axis; 211, contact piece; 212, second spring; 3, clamping mechanism; 301, force frame; 302, fixed rod; 303, second rotating rod; 304, flip rod; 305, clamping plate; 306, first elastic component; 307, auxiliary component; 3071, first auxiliary rod; 3072, second sliding block; 3073, second auxiliary rod; 3074, third sliding block; 3075, second elastic component; 4, inductor element. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0023] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] Example 1: See Figures 1-6 The present invention provides a technical solution: a simplified inductor with a junction box, comprising a support mechanism 1, the support mechanism 1 including a junction box 101, the top of the junction box 101 being rotatably connected to a box cover 106 via a hinge, the outer wall of the junction box 101 being fixedly connected to a first connecting piece 107, the inner wall of the junction box 101 being away from the first connecting piece 107 being provided with a first sliding groove 102, the inner wall of the junction box 101 being fixedly connected to a fixing bracket 103, the bottom inner wall of the junction box 101 being provided with a second sliding groove 105, the side of the junction box 101 adjacent to the second sliding groove 105 being fixedly connected to a first fixed shaft 104, and further comprising: The adjusting mechanism 2 includes a second connecting piece 201 arranged on the outside of the connecting box 101, and the outer wall of the second connecting piece 201 close to the connecting box 101 is fixedly connected to a connecting shaft 202, and the end of the connecting shaft 202 away from the second connecting piece 201 passes through the connecting box 101 and is fixedly connected to a connecting frame 203, and the outer wall of the connecting frame 203 close to the second connecting piece 201 is fixedly connected to a first spring 208, and the end of the first spring 208 away from the connecting frame 203 is fixedly connected to the connecting box 101, and a third sliding groove 204 is provided on the outer surface of the connecting frame 203 away from the connecting shaft 202, and a fixed block 209 is fixedly connected to the outer wall of the connecting frame 203 close to the connecting shaft 202, and a contact piece 211 is provided inside the fixed block 209, and an opening 205 is provided on the side of the connecting frame 203 close to the contact piece 211. A clamping mechanism 3 is provided at one end of the frame 203 away from the second connecting piece 201. The first spring 208, through elastic action, resets the second connecting piece 201 to its initial position after movement. When the inductor element 4 is placed inside the connection box 101, the first spring 208 pulls the second connecting piece 201 toward the connection box 101 through the connecting shaft 202 fixedly connected to the connection frame 203. The connecting wire of the inductor element 4 on the side close to the second connecting piece 201 is inserted into the contact piece 211 through the opening 205 on the connection frame 203. The contact piece 211 connects the second connecting piece 201 to one pole of the inductor element 4, while the first connecting piece 107 is connected to the other end of the inductor element 4. After being installed inside the connection box 101, the inductor element 4 can achieve a stable connection with the electrical equipment through the connection box 101, ensuring the normal operation of the circuit.

[0025] The clamping mechanism 3 includes a force-bearing frame 301 arranged inside the connection box 101, with the inductor element 4 placed on the top of the force-bearing frame 301, and a fixing rod 302 is fixedly connected to the outer wall of the force-bearing frame 301 on the side close to the connection frame 203, and the outer surface of the end of the fixing rod 302 away from the force-bearing frame 301 is slidably connected to the inner wall of the third sliding groove 204, and an auxiliary component 307 is provided at the bottom of the force-bearing frame 301. The force-bearing frame 301 supports the inductor element 4 and slides on the inner wall of the third sliding groove 204 through the fixing rod 302. When the connection frame 203 moves toward the direction of the inductor element 4, the connection frame 203 applies pressure to the fixing rod 302 through the third sliding groove 204, so that the force-bearing frame 301 slides toward the bottom of the connection box 101 under the action of the fixing rod 302.

[0026] The inner wall of the end of the connecting frame 203 away from the connecting shaft 202 is rotatably connected to the first rotating rod 206 via a rotating shaft. The end of the first rotating rod 206 away from the connecting frame 203 is rotatably connected to the first sliding block 207 via a rotating shaft. The first sliding block 207 is slidably connected inside the first sliding groove 102. The first sliding groove 102 limits the sliding distance of the first sliding block 207. When the connecting frame 203 moves toward the inductor element 4 under the action of the first spring 208, the connecting frame 203 drives the first sliding block 207 through the first rotating rod 206, so that the first sliding block 207 slides along the inner wall of the first sliding groove 102, thereby enhancing the stability of the connecting frame 203 and the second connecting piece 201 during the sliding process.

[0027] The inner wall of the fixed block 209 is fixedly connected to a second fixed shaft 210, and the contact piece 211 is slidably sleeved on the outer surface of the second fixed shaft 210. The outer wall of the contact piece 211 is fixedly connected to a second spring 212. The end of the second spring 212 away from the contact piece 211 is fixedly connected to the fixed block 209. The second spring 212 uses elastic action to restore the contact piece 211 to its initial position after movement. The second spring 212 applies pressure to the connecting wire at one end of the inductor element 4 through the contact piece 211 to ensure that the connecting wire is in close contact with the contact piece 211, thereby preventing the connection box 101 from disconnecting the inductor element 4 in a vibration environment.

[0028] Example 2: Please refer to Figure 7-Figure 9 On the basis of the first embodiment, the present invention provides a technical solution: the inner wall of the force-bearing frame 301 is rotatably connected to the second rotating rod 303 through a rotating shaft, the end of the second rotating rod 303 away from the force-bearing frame 301 is rotatably connected to the flip rod 304 through a rotating shaft, the end of the flip rod 304 away from the second rotating rod 303 is rotatably connected to the fixed frame 103, the force-bearing frame 301 drives the flip rod 304 to rotate around the fixed point through the second rotating rod 303, the end of the flip rod 304 away from the fixed frame 103 is rotatably connected to the clamping plate 305 through the rotating shaft, the outer wall of the clamping plate 305 close to the flip rod 304 is fixedly connected to the first elastic component 306, the first elastic component 306 is away from the clamping One end of the plate 305 is fixedly connected to the flip rod 304. The first elastic component 306 adjusts the clamping angle of the clamping plate 305 according to the outer surface shape of the inductor element 4 through elastic action. When the inductor element 4 is placed on the top of the force-bearing frame 301, the box cover 106 is completely closed and applies pressure to the inductor element 4, causing the force-bearing frame 301 to slide toward the bottom of the connection box 101 under the pressure of the inductor element 4. The force-bearing frame 301 drives the flip rod 304 to flip toward the inductor element 4 through the second rotating rod 303. The clamping plate 305 connected to the top of the flip rod 304 rotates to clamp and fix the outer surfaces of both ends of the inductor element 4, thereby enhancing the stability of the connection box 101 in a vibration environment.

[0029] The auxiliary component 307 includes a first auxiliary rod 3071 rotatably connected to the inner wall of the force-bearing frame 301, and the end of the first auxiliary rod 3071 away from the force-bearing frame 301 is rotatably connected to the second sliding block 3072 through a rotating shaft, and the second sliding block 3072 is slidably connected inside the second sliding groove 105, and the inner wall of the end of the second sliding block 3072 away from the first auxiliary rod 3071 is rotatably connected to the second auxiliary rod 3073 through a rotating shaft, and the outer wall of the end of the second auxiliary rod 3073 away from the second sliding block 3072 is rotatably connected to the third sliding block 3074 through a rotating shaft, and the third sliding block 3074 is movably sleeved on the outer surface of the first fixed shaft 104, and the outer wall of the end of the third sliding block 3074 away from the second auxiliary rod 3073 is fixedly connected to the second elastic component 3075, and the end of the second elastic component 3075 away from the third sliding block 3074 is fixed to the connecting box 101 The first fixed axis 104 limits the sliding distance of the third sliding block 3074. When the force-bearing frame 301 slides toward the bottom of the connection box 101, the force-bearing frame 301 applies pressure to the second sliding block 3072 through the first auxiliary rod 3071, so that the second sliding block 3072 slides in the second sliding groove 105. The second sliding block 3072 pushes the third sliding block 3074 to slide along the outer surface of the first fixed axis 104 through the second auxiliary rod 3073. During the sliding process of the third sliding block 3074, the third sliding block 3074 ensures that the pulling force of the second auxiliary rod 3073 rotatably connected on both sides on the second sliding block 3072 remains consistent, so that the force-bearing frame 301 can maintain horizontal sliding relative to the bottom of the connection box 101, thereby ensuring that the inductor element 4 can be fully installed in place during the installation process, thereby improving the accuracy and stability of the installation.

[0030] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A simple inductor with a junction box, comprising a support mechanism (1), the support mechanism (1) comprising a junction box (101), the top of the junction box (101) being rotatably connected to a box cover (106) via a hinge, the outer wall of the junction box (101) being fixedly connected to a first connecting piece (107), a first sliding groove (102) being provided on the inner wall of the junction box (101) away from the first connecting piece (107), a fixing frame (103) being fixedly connected to the inner wall of the junction box (101), a second sliding groove (105) being provided on the inner wall of the bottom of the junction box (101), and a first fixed shaft (104) being fixedly connected to the side of the junction box (101) close to the second sliding groove (105), characterized in that: Also included are: The regulating mechanism (2) comprises a second connecting piece (201) arranged outside the connecting box (101), the outer wall of the second connecting piece (201) close to the connecting box (101) is fixedly connected to a connecting shaft (202), an end of the connecting shaft (202) away from the second connecting piece (201) passes through the connecting box (101) and is fixedly connected to a connecting frame (203), the outer wall of the connecting frame (203) close to the second connecting piece (201) is fixedly connected to a first spring (208), and the first spring (208) is away from the connecting frame (203). One end is fixedly connected to the connection box (101); a third sliding groove (204) is provided on the outer surface of the side of the connection frame (203) away from the connection shaft (202); a fixed block (209) is fixedly connected to the outer wall of the side of the connection frame (203) close to the connection shaft (202); a contact piece (211) is provided inside the fixed block (209); an opening (205) is provided on the side of the connection frame (203) close to the contact piece (211); and a first spring (208) causes the second connection piece (201) to return to its initial position after moving through elastic action.

2. The simplified inductor with a junction box according to claim 1, characterized in that: The inner wall of one end of the connecting frame (203) away from the connecting shaft (202) is rotatably connected to a first rotating rod (206) via a rotating shaft. The end of the first rotating rod (206) away from the connecting frame (203) is rotatably connected to a first sliding block (207) via a rotating shaft. The first sliding block (207) is slidably connected inside the first sliding groove (102). The first sliding groove (102) limits the sliding distance of the first sliding block (207).

3. The simplified inductor with a junction box according to claim 2, characterized in that: The inner wall of the fixed block (209) is fixedly connected to a second fixed shaft (210), the contact piece (211) is slidably sleeved on the outer surface of the second fixed shaft (210), the outer wall of the contact piece (211) is fixedly connected to a second spring (212), one end of the second spring (212) away from the contact piece (211) is fixedly connected to the fixed block (209), and the second spring (212) causes the contact piece (211) to return to its initial position after moving through elastic action.

4. The simplified inductor with a junction box according to claim 1, characterized in that: A clamping mechanism (3) is provided at one end of the connecting frame (203) away from the second connecting piece (201); the clamping mechanism (3) comprises a force-bearing frame (301) provided inside the connecting box (101), an inductor element (4) is placed on the top of the force-bearing frame (301), a fixing rod (302) is fixedly connected to the outer wall of one side of the force-bearing frame (301) close to the connecting frame (203), an outer surface of an end of the fixing rod (302) away from the force-bearing frame (301) is slidably connected to the inner wall of the third sliding groove (204), an auxiliary component (307) is provided at the bottom of the force-bearing frame (301), and the connecting frame (203) squeezes the fixing rod (302) through the third sliding groove (204).

5. The simplified inductor with a junction box according to claim 4, characterized in that: The inner wall of the force-bearing frame (301) is rotatably connected to a second rotating rod (303) via a rotating shaft. One end of the second rotating rod (303) away from the force-bearing frame (301) is rotatably connected to a flip rod (304) via a rotating shaft. One end of the flip rod (304) away from the second rotating rod (303) is rotatably connected to the fixed frame (103). The force-bearing frame (301) drives the flip rod (304) to rotate around a fixed point via the second rotating rod (303).

6. The simplified inductor with a junction box according to claim 5, characterized in that: One end of the flip rod (304) away from the fixing frame (103) is rotatably connected to a clamping plate (305) via a rotating shaft, and an outer wall of the clamping plate (305) close to the flip rod (304) is fixedly connected to a first elastic component (306), and one end of the first elastic component (306) away from the clamping plate (305) is fixedly connected to the flip rod (304). The first elastic component (306) adjusts the clamping angle of the clamping plate (305) according to the outer surface shape of the inductor element (4) through elastic action.

7. The simplified inductor with a junction box according to claim 4, characterized in that: The auxiliary component (307) includes a first auxiliary rod (3071) rotatably connected to the inner wall of the force-bearing frame (301); an end of the first auxiliary rod (3071) away from the force-bearing frame (301) is rotatably connected to a second sliding block (3072) via a rotating shaft; the second sliding block (3072) is slidably connected inside the second sliding groove (105); and the force-bearing frame (301) squeezes the second sliding block (3072) through the first auxiliary rod (3071).

8. The simplified inductor with a junction box according to claim 7, characterized in that: The inner wall of one end of the second sliding block (3072) away from the first auxiliary rod (3071) is rotatably connected to the second auxiliary rod (3073) via a rotating shaft, and the outer wall of one end of the second auxiliary rod (3073) away from the second sliding block (3072) is rotatably connected to the third sliding block (3074) via a rotating shaft. The third sliding block (3074) is movably sleeved on the outer surface of the first fixed shaft (104). The outer wall of one end of the third sliding block (3074) away from the second auxiliary rod (3073) is fixedly connected to the second elastic component (3075). One end of the second elastic component (3075) away from the third sliding block (3074) is fixedly connected to the connecting box (101), and the first fixed shaft (104) limits the sliding distance of the third sliding block (3074).

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