Debridement device for emergency treatment wounds

Through the design of the rotating mechanism and disassembly placement mechanism, the problems of uneven heating, drying and disinfection of surgical instruments are solved, uniform processing of surgical instruments and convenient separation of waste are achieved, and the treatment efficiency of emergency trauma debridement devices is improved.

CN120531501AInactive Publication Date: 2025-08-26NANZHENG DISTRICT PEOPLES HOSPITAL OF HANZHONG CITY
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Patent Information

Application Number
CN202510721247.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-30
Publication Date
2025-08-26
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing surgical instruments in the trauma debridement trachea are placed in a disorderly manner in the placement tray, resulting in uneven heating and disinfection, affecting the efficiency of emergency trauma treatment.

Method used

A rotating mechanism and disassembly and placement mechanism are designed to drive the pallet and placement tray to rotate by driving the motor, combining the rolling components and collection components to achieve uniform heating, drying and disinfection of surgical instruments; at the same time, through the elastic locking components and the toggle adjustment components, the separation and disassembly and assembly of waste is facilitated.

Benefits of technology

It improves the uniformity of heating, drying and disinfection of surgical instruments, enhances the convenience of waste treatment, and improves the efficiency of emergency trauma treatment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The debridement device comprises a wound debridement disc main body, the wound debridement disc main body comprises a main box body, a placement tray is arranged at the bottom end of the interior of the main box body, electric heating rods are arranged at the two ends of the interior of the main box body, and an ultraviolet disinfection lamp is installed at the top end of the interior of the main box body. Supporting brackets are mounted at the two ends of the upper surface of the main box body through lifting rods; by designing a rotating mechanism, after debridement treatment, surgical instruments can be placed in a placement tray after being cleaned, residual water on the surfaces of the surgical instruments penetrates through the placement tray and enters a collection box for collection treatment, and a driving motor operates to drive a supporting plate and the placement tray to stably support and rotate; the placing tray stably supports and rotates to drive the surgical instruments to rotate inside, so that the electric heating rod is convenient to rotate, uniformly heat and quickly dry during heating and drying, and meanwhile, the ultraviolet disinfection lamp uniformly disinfects the surgical instruments.
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Description

Technical Field

[0001] The invention belongs to the technical field of wound debridement trays, and in particular relates to an emergency wound debridement device. Background Art

[0002] Emergency refers to patients with a more rapid and serious illness that requires urgent treatment. Trauma is the destruction of human tissue caused by various factors, and trauma requires rapid diagnosis, treatment and debridement. Debridement is usually treated with a debridement tray. Existing trauma debridement trays are medical devices used by emergency departments for rapid diagnosis and treatment of trauma patients. When used, they facilitate uniform heating and rapid drying of surgical instruments used for trauma. Drying is simultaneously disinfected by ultraviolet disinfection lamps, making hygienic debridement convenient and improving the uniformity of heating, drying and disinfecting surgical instruments after use in emergency trauma, effectively debridement of the wound.

[0003] When placing surgical instruments inside the placement tray, the heating devices are located at both ends inside the main box, and the two sides of the placement tray are respectively located at the rear end and the front end inside the main box. At the same time, the surgical instruments are placed in a disorderly manner inside the placement tray and are at a certain distance from the electric heating rod, which makes it inconvenient for the surgical instruments to be heated and disinfected uniformly, affecting the uniformity of heating, drying and disinfecting the surgical instruments after the debridement tray is used in emergency trauma. For this reason, the present invention proposes a debridement device for emergency trauma. Summary of the Invention

[0004] The purpose of the present invention is to provide a debridement device for emergency trauma to solve the problem proposed in the above background technology that surgical instruments are placed in a disorderly manner inside the placement tray and are at a certain distance from the electric heating rod, making it inconvenient for the surgical instruments to be heated and disinfected uniformly, affecting the uniformity of heating, drying and disinfection of the surgical instruments by the debridement tray after use in emergency trauma.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an emergency wound debridement device, comprising a wound debridement tray body, the wound debridement tray body comprising a main box, a tray being provided at the bottom end of the interior of the main box, electric heating rods being provided at both ends of the interior of the main box, an ultraviolet disinfection lamp being installed at the top end of the interior of the main box, support brackets being installed at both ends of the upper surface of the main box via lifting rods, a box door being provided on the front surface of the main box, and the wound debridement tray body being further provided with:

[0006] A rotating mechanism, wherein the rotating mechanism includes a driving connection assembly provided on the lower surface of the tray and located at the bottom end of the interior of the main box body, a rolling assembly provided on the lower surface of the driving connection assembly, and a collecting assembly provided on the lower surface of the tray and located inside the driving connection assembly;

[0007] The disassembly and placement mechanism includes a placement component arranged on the upper surface of the main box body, the two ends of the placement component are located inside the main box body and are provided with elastic locking components, and the upper surface of the elastic locking component is located on the surface of the main box body and is provided with a toggle adjustment component.

[0008] Preferably, the drive connection assembly includes a drive motor fixed to the bottom end of the main box body by screws, the end of the drive motor is located at the inner bottom end of the main box body and is fixed with a support plate by screws, and the upper surface of the support plate is fixedly connected to the lower surface of the tray by screws.

[0009] Preferably, the rolling assembly includes a rolling groove opened at the edge of the lower surface of the support plate, wherein a ball rolls inside the rolling groove, and the outer surface of the ball contacts the inner bottom end of the main box body.

[0010] Preferably, the collecting assembly includes placement grooves opened at both ends of the interior of the supporting plate, and a collecting box is placed inside the supporting plate through the placement grooves, and the upper surface of the collecting box is in contact with the lower surface of the placement tray.

[0011] Preferably, two flexible card bodies are provided at both ends of the collection box, two second card holes are provided on one side of the placement slot located inside the supporting plate, and the flexible card body is engaged with the second card hole.

[0012] Preferably, the placement component includes a mounting groove provided on the upper surface of the main box body, a waste placement tray is placed inside the mounting groove, and one end of the waste placement tray is provided with four medicine bottle embedding grooves.

[0013] Preferably, the elastic locking assembly includes a limit movement groove opened on both sides of the installation groove and located inside the main box body, the internal limit movement of the limit movement groove is limited by a limit clamp, and a compression spring is provided at the connection between the end of the limit clamp and the end of the limit movement groove, and a clamping hole 1 is opened on both sides of the waste placement plate, and the internal structure of the limit clamp is consistent with that of the clamping hole 1.

[0014] Preferably, the toggle adjustment assembly includes a toggle groove opened on the upper surface of the limiting movement groove and located on the surface of the main box body, a toggle threaded rod is provided inside the toggle groove, and the end of the toggle threaded rod is rotationally fixed to the inner surface of the end of the limiting clamp through a threaded structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By designing a rotating mechanism, the surgical instruments can be placed inside the placement tray after cleaning after debridement. The residual moisture on the surface of the surgical instruments passes through the placement tray into the collection box for collection and treatment. The driving motor drives the support plate and the placement tray to rotate stably. The rotation of the placement tray stably supports the surgical instruments to rotate inside. Therefore, the electric heating rod is easy to rotate evenly during heating and drying, and is quickly dried by heating. At the same time, the ultraviolet disinfection lamp evenly disinfects the surgical instruments, thereby improving the uniformity of heating, drying and disinfection of the trauma debridement tray body after use in emergency trauma.

[0017] The waste placement tray can be placed inside the support bracket by designing a disassembly and placement mechanism. The compression spring is deformed to elastically engage the limit clamp head in the first clamping hole to elastically lock the waste placement tray. The threaded rod is rotated again to reinforce the limit clamp head and the waste placement tray. The medicine bottle is embedded in the groove and engaged to place the debridement medicine bottle. The waste is placed inside the waste placement tray, which is convenient for separation and placement and not easy to mix and pollute. After use, the waste placement tray is disassembled to take out the medicine bottle. Therefore, the waste placement tray is convenient to disassemble and assemble, and the cleaning and disposal of waste is more convenient, which improves the convenience of the trauma debridement tray body in disassembling and disposing of waste after emergency trauma debridement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a side cross-sectional structural schematic diagram of the present invention;

[0020] Figure 3 For the present invention Figure 2 The enlarged structural diagram of part B in the middle;

[0021] Figure 4 This is a schematic diagram of the collection box and flexible card structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the support plate, ball bearings and placement groove structure of the present invention;

[0023] Figure 6 For the present invention Figure 1 A schematic diagram of the enlarged structure of part A;

[0024] Figure 7 For the present invention Figure 2 The enlarged three-dimensional structure diagram of part C in the middle;

[0025] Figure 8 This is a structural diagram of the waste placement tray, medicine bottle embedding groove and clamping hole of the present invention;

[0026] In the figure: 100, wound debridement tray body; 101, main box body; 1011, waste placement tray; 1012, medicine bottle embedding slot; 1013, installation slot; 1014, toggle slot; 1015, toggle threaded rod; 1016, compression spring; 1017, limit movement slot; 1018, limit clamp; 1019, clamping hole 1; 102, box door; 103, support bracket; 104, placement tray; 1041, support plate; 1042, drive motor; 1043, collection box; 1044, flexible card body; 1045, clamping hole 2; 1046, ball; 1047, rolling slot; 1048, placement slot; 105, electric heating rod; 106, ultraviolet disinfection lamp. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0028] Example 1

[0029] See also Figures 1 to 5 The present invention provides a technical solution: an emergency wound debridement device, comprising a wound debridement tray body 100, the wound debridement tray body 100 comprising a main box body 101, an internal bottom end of the main box body 101 is provided with a placement tray 104, the bottom end of the main box body 101 contacts the placement surface to stably place the wound debridement tray body 100 in the use position, both ends of the upper surface of the main box body 101 are installed with support brackets 103 through lifting rods, the injured part is placed on the surface of the support bracket 103 for debridement, both ends of the interior of the main box body 101 are provided with electric heating rods 105, the internal top end of the main box body 101 is installed with an ultraviolet disinfection lamp 106, and the front surface of the main box body 101 is provided with a box door 102. After the debridement treatment, the surgical instruments are washed and placed in the interior of the placement tray 104, the surgical instruments are heated and dried by the electric heating rods 105, and the surgical instruments are disinfected by the ultraviolet disinfection lamp 106. The wound debridement tray body 100 is also provided with:

[0030] A rotating mechanism includes a driving connection assembly arranged on the lower surface of the placement tray 104 at the bottom end of the main box body 101, a rolling assembly is arranged on the lower surface of the placement tray 104, and a collecting assembly is arranged inside the driving connection assembly. After the wound debridement tray main body 100 is used for emergency wound debridement, the cleaned surgical instruments are placed on the surface of the placement tray 104, and the placement tray 104 and the surgical instruments are rotated evenly by the rotating mechanism to heat, dry and disinfect quickly, thereby improving the uniformity of heating, drying and disinfecting the surgical instruments of the wound debridement tray main body 100 after use in emergency wound debridement.

[0031] In order to facilitate the stable rotation of the placement tray 104 and the surgical instruments through the drive connection assembly, uniform heating, rapid drying and disinfection, in this embodiment, preferably, the drive connection assembly includes a drive motor 1042 fixed to the bottom end of the main box body 101 by screws, and the drive motor 1042 can be operated to provide power driving operation. The end of the drive motor 1042 is located at the bottom end of the interior of the main box body 101 and is fixed with a support plate 1041 by screws. The upper surface of the support plate 1041 is fixed to the lower surface of the placement tray 104 by screws. At this time, the surgical instruments are placed inside the placement tray 104, and the drive motor 1042 drives the support plate 1041 and the placement tray 104 to rotate, so that the surgical instruments are rotated uniformly, heated, quickly dried and disinfected.

[0032] In order to facilitate the stable support and rotation of the placement tray 104 through the rolling assembly, in this embodiment, preferably, the rolling assembly includes a rolling groove 1047 opened at the edge of the lower surface of the support plate 1041, and the rolling groove 1047 has a ball 1046 rolling inside the rolling groove 1047. The outer surface of the ball 1046 is in contact with the inner bottom end of the main box body 101. When the support plate 1041 and the placement tray 104 are rotated, the ball 1046 is driven to roll inside the rolling groove 1047, and the ball 1046 is brought into contact with the inner bottom end of the main box body 101 to stably support the rolling, so that the placement tray 104 and the support plate 1041 are stably supported and rotated, uniformly heated, quickly dried and disinfected.

[0033] In order to facilitate the collection of residual moisture when the surgical instruments are placed on the surface of the placement tray 104 after cleaning through the collection component, in this embodiment, preferably, the collection component includes placement grooves 1048 opened at both ends of the interior of the support plate 1041, and a collection box 1043 is placed inside the support plate 1041 through the placement grooves 1048. The upper surface of the collection box 1043 contacts the lower surface of the placement tray 104, and the collection box 1043 can be snap-fitted and installed through the placement grooves 1048, so that the collection box 1043 is fixedly installed for use, and the residual moisture after cleaning is collected through the collection box 1043.

[0034] In order to place the collection box 1043 through the placement slot 1048, the flexible card body 1044 is engaged with the inside of the second card hole 1045 to fix the collection box 1043 in place, in this embodiment, preferably, two flexible card bodies 1044 are provided at both ends of the collection box 1043, and one side of the placement slot 1048 is located inside the support plate 1041 and has two second card holes 1045, and the flexible card body 1044 is engaged with the second card hole 1045, so that the collection box 1043 can be placed and fixed in place.

[0035] Example 2

[0036] See also Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 and Figure 8 The present invention provides a technical solution: an emergency wound debridement device, comprising a wound debridement tray body 100, which comprises a main box body 101, a placing tray 104 being provided at the bottom end of the main box body 101, and the wound debridement tray body 100 being stably placed in the position of use by contacting the placing surface with the bottom end of the main box body 101. Support brackets 103 are installed at both ends of the upper surface of the main box body 101 through lifting rods, and the injured part is placed on the surface of the support bracket 103 for debridement treatment, and electric heating rods 105 are provided at both ends of the interior of the main box body 101, and an ultraviolet disinfection lamp 106 is installed at the top end of the interior of the main box body 101, and a box door 102 is provided on the front surface of the main box body 101. After the debridement treatment, the surgical instruments are washed and placed in the interior of the placing tray 104, and the surgical instruments are heated and dried by the electric heating rod 105, and disinfected by the ultraviolet disinfection lamp 106. The wound debridement tray body 100 is also provided with:

[0037] The disassembly and placement mechanism includes a placement component arranged on the upper surface of the main box body 101, and elastic locking components are arranged at both ends of the placement component located inside the main box body 101. The upper surface of the elastic locking component is located on the surface of the main box body 101 and a toggle adjustment component is arranged. When the wound debridement tray main body 100 is in use, the disassembly and placement mechanism can be used to separate and place medicine bottles and waste, and it is convenient to disassemble and clean after debridement, which makes cleaning more convenient, thereby improving the convenience of the wound debridement tray main body 100 in disassembling and assembling the waste placement tray 1011 to handle waste after emergency wound debridement.

[0038] In order to facilitate the placement of medicine bottles and waste through the placement component, and on the contrary, to facilitate the disassembly and cleaning of waste placement tray 1011 after debridement, and to make cleaning more convenient, in this embodiment, preferably, the placement component includes a mounting groove 1013 opened on the upper surface of the main box body 101, and the mounting groove 1013 facilitates the fixed placement of the waste placement tray 1011, and the waste placement tray 1011 is placed inside the mounting groove 1013. Four medicine bottle embedding grooves 1012 are opened at one end of the waste placement tray 1011, and medicine bottles are placed inside the medicine bottle embedding grooves 1012, and waste is placed inside the waste placement tray 1011, which is convenient for separate placement and convenient for disassembly and cleaning of waste.

[0039] In order to facilitate the reinforcement and placement of the waste placement tray 1011 through the elastic locking assembly, in this embodiment, preferably, the elastic locking assembly includes a limit movement groove 1017 opened on both sides of the installation groove 1013 and located inside the main box body 101, and the internal limit movement of the limit movement groove 1017 is limited by a limit clamp 1018, and a compression spring 1016 is provided at the connection between the end of the limit clamp 1018 and the end of the limit movement groove 1017. The limit clamp 1018 is elastically connected to the inside of the limit movement groove 1017 by the compression spring 1016 to facilitate elastic locking and fixation. A clamping hole 1019 is opened on both sides of the waste placement tray 1011, and the internal structure of the limit clamp 1018 and the clamping hole 1019 are consistent until the limit clamp 1018 is elastically engaged with the inside of the clamping hole 1019 to engage and fix the waste placement tray 1011.

[0040] In order to facilitate the adjustment of the limit clamp 1018 by toggling the adjustment component, and to facilitate the toggling and adjusting of the limit clamp 1018 to disassemble and assemble the waste placement tray 1011 to clean the waste, in this embodiment, preferably, the toggle adjustment component includes a toggle groove 1014 located on the upper surface of the limit movement groove 1017 and located on the surface of the main box body 101, and a toggle threaded rod 1015 is provided inside the toggle groove 1014. The end of the toggle threaded rod 1015 and the inner surface of the end of the limit clamp 1018 are rotationally fixed by a threaded structure. The toggle threaded rod 1015 can be slid inside the toggle groove 1014 to slide and adjust the limit clamp 1018, which is convenient for the disassembly and assembly of the limit clamp 1018. On the contrary, after the waste placement tray 1011 is engaged, the toggle threaded rod 1015 is rotated to reinforce the placement of the limit clamp 1018 and the waste placement tray 1011.

[0041] The working principle and use process of the present invention are as follows: before using the emergency trauma debridement device, the wound debridement tray body 100 is stably placed in the use position by contacting the placement surface with the bottom end of the main box 101, and the toggle threaded rod 1015 is slid inside the toggle groove 1014 to drive the limit clamp 1018 to retract into the limit movable groove 1017, and the waste placement tray 1011 is placed inside the support bracket 103. The toggle threaded rod 1015 is loosened, and the compression spring 1016 is deformed to elastically engage the limit clamp 1018 inside the clamp hole 1019 to elastically lock the waste placement tray 1011. The toggle threaded rod 1015 is rotated again to align the limit clamp 1018 with the waste placement tray 1011 The waste tray 1011 is reinforced, so after the waste placement tray 1011 is fixedly installed, when the wound debridement tray body 100 is used, the support bracket 103 is adjusted to the height of use, and the injured part is placed on the surface of the support bracket 103, and the debridement medicine bottle can be clamped and placed inside the medicine bottle embedding groove 1012, and waste is placed inside the waste placement tray 1011, which is convenient for separation and placement. After use, the waste placement tray 1011 is disassembled again to take out the medicine bottle and clean up the waste. Therefore, the waste placement tray 1011 is easy to disassemble and assemble, which is convenient for cleaning the waste after debridement, and the cleaning and disposal of the waste is more convenient, thereby improving the convenience of the wound debridement tray body 100 in disassembling and disposing the waste placement tray 1011 after emergency wound debridement.

[0042] Then, after the wound debridement tray body 100 is used, the collection box 1043 can be clamped into the interior of the support plate 1041 through the placement groove 1048. After the collection box 1043 is clamped, the flexible clamp body 1044 is deformed and clamped into the interior of the clamp hole 1045 to clamp and fix the collection box 1043. Therefore, after the debridement treatment, the surgical instruments are cleaned and placed in the interior of the placement tray 104. The residual moisture on the surface of the surgical instruments passes through the placement tray 104 and enters the interior of the collection box 1043 for collection and treatment. Therefore, the driving motor 1042 is driven to operate. It drives the support plate 1041 and the placement tray 104 to rotate. When the support plate 1041 rotates, it drives the ball 1046 to roll inside the rolling groove 1047 and contact the inner bottom end of the main box 101 to roll. The placement tray 104 stably supports the rotation and drives the surgical instruments to rotate inside. Therefore, the electric heating rod 105 is easy to rotate and heat evenly and dry quickly during heating and drying. At the same time, the ultraviolet disinfection lamp 106 evenly disinfects the surgical instruments, thereby improving the uniformity of heating, drying and disinfection of the trauma debridement tray main body 100 for surgical instruments after use in emergency trauma.

[0043] Although embodiments of the present invention have been shown and described (see the detailed description above for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An emergency wound debridement device, comprising a wound debridement tray body (100), the wound debridement tray body (100) comprising a main box (101), a tray (104) being provided at the bottom end of the interior of the main box (101), electric heating rods (105) being provided at both ends of the interior of the main box (101), an ultraviolet disinfection lamp (106) being installed at the top end of the interior of the main box (101), support brackets (103) being installed at both ends of the upper surface of the main box (101) via lifting rods, and a box door (102) being provided on the front surface of the main box (101), characterized in that: The wound debridement tray body (100) is further provided with: A rotating mechanism, wherein the rotating mechanism comprises a driving connection assembly arranged on the lower surface of the placement tray (104) and located at the bottom end of the interior of the main box (101); a rolling assembly is arranged on the lower surface of the placement tray (104); and a collecting assembly is arranged on the lower surface of the placement tray (104) and located inside the driving connection assembly; The disassembly and placement mechanism comprises a placement component arranged on the upper surface of a main box (101), elastic locking components are arranged at both ends of the placement component located inside the main box (101), and a toggle adjustment component is arranged on the upper surface of the elastic locking component located on the surface of the main box (101).

2. The emergency wound debridement device according to claim 1, characterized in that: The drive connection assembly comprises a drive motor (1042) fixed to the bottom end of the main box (101) by screws, the end of the drive motor (1042) is located at the inner bottom end of the main box (101) and is fixed to a support plate (1041) by screws, and the upper surface of the support plate (1041) is fixed to the lower surface of the tray (104) by screws.

3. The emergency wound debridement device according to claim 2, characterized in that: The rolling assembly includes a rolling groove (1047) opened at the edge of the lower surface of the support plate (1041), a ball (1046) rolling inside the rolling groove (1047), and an outer surface of the ball (1046) contacts the inner bottom end of the main box body (101).

4. The emergency wound debridement device according to claim 2, characterized in that: The collecting assembly comprises placement grooves (1048) opened at both ends of the interior of the supporting plate (1041); a collecting box (1043) is placed inside the supporting plate (1041) through the placement grooves (1048); and the upper surface of the collecting box (1043) contacts the lower surface of the placement tray (104).

5. The emergency wound debridement device according to claim 4, characterized in that: Two flexible card bodies (1044) are provided at both ends of the collection box (1043); one side of the placement slot (1048) is located inside the support plate (1041) and has two second card holes (1045), and the flexible card body (1044) is engaged with the second card holes (1045).

6. The emergency wound debridement device according to claim 1, characterized in that: The placement component comprises a mounting groove (1013) provided on the upper surface of the main box (101), a waste placement tray (1011) is placed inside the mounting groove (1013), and four medicine bottle embedding grooves (1012) are provided at one end of the waste placement tray (1011).

7. The emergency wound debridement device according to claim 6, characterized in that: The elastic locking assembly comprises a limiting movable groove (1017) provided on both sides of the installation groove (1013) and located inside the main box (101); a limiting clamp (1018) is provided inside the limiting movable groove (1017); a compression spring (1016) is provided at the connection between the end of the limiting clamp (1018) and the end of the limiting movable groove (1017); a clamping hole (1019) is provided on both sides of the waste placement tray (1011), and the internal structure of the limiting clamp (1018) and the clamping hole (1019) are consistent.

8. The emergency wound debridement device according to claim 7, characterized in that: The toggle adjustment assembly comprises a toggle groove (1014) provided on the upper surface of the limiting movable groove (1017) and located on the surface of the main box body (101); a toggle threaded rod (1015) is provided inside the toggle groove (1014); the end of the toggle threaded rod (1015) and the inner surface of the end of the limiting clamp (1018) are rotationally fixed via a threaded structure.