Nickel-hydrogen battery measuring clamp

Abstract

The utility model discloses a nickel-hydrogen battery measuring clamp, which relates to the technical field of electrochemical battery measurement and comprises a clamp frame, a fixed clamping plate and a movable clamping plate, and universal wheels are mounted at corners of the bottom surface of the clamp frame; the fixed clamping plate is arranged at one end of the top surface of the clamp frame; the movable clamping plate is arranged at the other end of the top face of the clamp frame and can move in the length direction of the clamp frame. Electrode binding posts are arranged on the opposite side faces of the fixed clamping plate and the movable clamping plate, the electrode binding posts penetrate through through holes in the middles of electrode binding post panels and stretch into round holes in the built-in sliding blocks, and the electrode binding post panels are installed on the side faces of the built-in sliding blocks. The built-in sliding blocks can move in the height direction of the corresponding fixed clamping plate and the movable clamping plate. According to the utility model, the test requirements of different models of batteries can be met, and the universality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical battery measurement, in particular to a nickel-hydrogen battery measurement fixture. Background Art

[0002] To address global climate change and energy shortages, my country has set a goal of reaching peak carbon emissions by 2030 and achieving carbon neutrality by 2060. The power industry is one of the leading contributors to greenhouse gas emissions. The large-scale deployment of battery energy storage technology can facilitate the integration and consumption of renewable energy, playing a significant role in accelerating the achievement of carbon neutrality in the energy and power sector.

[0003] Nickel-hydrogen batteries have long been proven to be a very valuable energy storage technology, but high prices and costs are the biggest challenges to the wider application of this technology. With technological advances, new nickel-hydrogen batteries using NiMoCo catalyst layers have demonstrated superior electrochemical performance, with a mass energy density of up to 140Wh / kg. They also have excellent cycling stability, with almost no performance degradation after 1500 cycles. In the negative electrode, NiMoCo acts as a bifunctional catalyst, catalyzing the hydrogen evolution reaction and the hydrogen oxidation reaction. Replacing the traditional precious metal Pt / C with inexpensive transition metal NiMoCo as the negative electrode catalyst layer material will significantly reduce the manufacturing cost of nickel-hydrogen batteries. The new nickel-hydrogen battery with low cost, ultra-long service life, no risk of fire or thermal runaway, no need for routine maintenance, and a wide temperature window will be promoted from the laboratory to large-scale application, contributing to the development of clean energy and achieving the dual carbon goals.

[0004] Unlike conventional lithium-ion or lead-acid batteries, individual nickel-metal hydride batteries are cylindrical and large, with diameters up to 0.17 meters, lengths up to 1.8 meters, and weights up to 60 kilograms. They have a rated energy of up to 3 kWh and feature protruding positive and negative terminals on either side. Due to the large size, length, and weight of nickel-metal hydride batteries, as well as their high charge and discharge currents, it's crucial to ensure that the positive and negative terminals of the nickel-metal hydride battery are securely connected to the positive and negative terminals of the battery testing equipment during measurement.

[0005] Therefore, those skilled in the art provide a nickel-hydrogen battery measurement fixture to solve the problems raised in the above background technology. Utility Model Content

[0006] The utility model provides a nickel-hydrogen battery measuring fixture which can meet the testing requirements of batteries of different models and has increased universality.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] The utility model discloses a nickel-hydrogen battery measuring fixture, comprising:

[0009] A fixture frame, wherein universal wheels are installed at the corners of the bottom surface of the fixture frame;

[0010] A fixed splint, the fixed splint being arranged at one end of the top surface of the fixture frame;

[0011] A movable splint, which is arranged at the other end of the top surface of the clamp frame and can move along the length direction of the clamp frame;

[0012] Electrode terminals are provided on the opposite sides of the fixed splint and the movable splint. The electrode terminals pass through the through holes in the middle of the electrode terminal panel and extend into the circular holes on the built-in slider. The electrode terminal panel is installed on the side of the built-in slider, and the built-in slider can move along the height direction of the corresponding fixed splint and movable splint.

[0013] Furthermore, the fixed splint and the movable splint each have a vertical portion and a horizontal portion, the two vertical portions are arranged opposite to each other and in parallel, the opposite side surfaces of the two vertical portions are each provided with a first slide groove, the top surfaces of the two vertical portions are each recessed inwardly to form a second slide groove, the first slide groove is connected to the second slide groove, and the built-in slider can slide in the space formed by the first slide groove and the second slide groove;

[0014] Two groups of adjustment holes are symmetrically provided on the side surfaces of the two vertical portions that are away from each other. The two groups of adjustment holes are respectively provided on both sides of the corresponding first chute and are provided along the height direction of the vertical portion.

[0015] Both ends of the built-in slider are provided with built-in slider threaded holes, and the built-in slider is positioned by screws passing through an adjustment hole and the corresponding built-in slider threaded holes.

[0016] Furthermore, an electrode terminal panel threaded hole is opened on the electrode terminal panel corresponding to the position of the built-in slider threaded hole, and a fixing nut is installed on the end of the electrode terminal panel threaded hole away from the built-in slider, and the fixing nut can be connected to the screw.

[0017] Furthermore, the end of the electrode terminal has a circular protrusion, and a spring is abutted between the circular protrusion and the electrode terminal panel, and the spring is sleeved on the electrode terminal.

[0018] Furthermore, a guide block is formed on the middle part of the side surface of the built-in slider away from the electrode terminal panel, which protrudes outward. The guide block extends into the first slide groove and can slide in the first slide groove to guide the sliding direction of the built-in slider and avoid the occurrence of the built-in slider sliding deviation.

[0019] Furthermore, two slide grooves are symmetrically provided on the top surface of the fixture frame, and the cross-sections of the two slide grooves are L-shaped structures, and the short sides of the two L-shaped structures are arranged opposite to each other;

[0020] The bottom surfaces of the two horizontal portions each have two symmetrical L-shaped protrusions, and the two L-shaped protrusions are adapted to the corresponding sliding grooves.

[0021] Furthermore, a plurality of sawtooth blocks are provided on the bottom surface of the horizontal portion of the movable splint;

[0022] A plurality of serrated slots are provided on the top surface of the clamp frame and on both sides of the two slide grooves. The plurality of serrated slots are provided below the movable splint, and the length of the plurality of serrated slots is greater than the length of the horizontal part of the movable splint. The plurality of serrated blocks and serrated slots cooperate to fix the movable splint on the clamp frame.

[0023] Furthermore, a power-on indicator light is installed on the horizontal part of the fixed splint, and the power-on indicator light is connected to the two built-in sliders through wires; the built-in slider is electrically connected to the electrode terminal panel and the electrode terminal, that is, the power-on indicator light is connected in series with the two electrode terminals.

[0024] Furthermore, two fixing ports are provided on the front side of the clamp frame, and a snap fixing port is provided on the rear side of the clamp frame at a position corresponding to the position of the fixing port. The fixing port at the end of the fixing strap is fixed in each fixing port, and a plurality of snaps are provided on the end of the strap away from the fixing port, and the snaps can be engaged with the corresponding snap fixing ports.

[0025] In the above technical solution, the nickel-hydrogen battery measuring fixture provided by the present invention has the following beneficial effects:

[0026] 1. This application fixes the battery by adjusting the movable clamp in the length direction of the clamp frame, and then fine-tunes the two clamps through the spring device to make the battery contact more secure; the fixed clamp and the movable clamp of the clamp frame can be adjusted up and down to change the position of the electrode, and the terminal is driven up and down by adjusting the built-in slider, which can meet the testing needs of different battery models and increase universality.

[0027] 2. Four universal wheels are installed at the bottom of the fixture frame, which increases the convenience of movement for large-volume batteries such as nickel-hydrogen batteries.

[0028] 3. Two sets of straps are set on the short side of the fixture frame, which can effectively prevent the cylindrical battery from rolling during testing and moving, and can effectively fit the battery.

[0029] 4. A power-on indicator light is installed on one end of the fixed splint of the clamp frame. The power-on indicator light can be used to determine whether the battery is connected in place.

[0030] 5. This application has the characteristics of adjustable length, adjustable height, movable clamp device, fixed battery, power-on indicator light, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0032] Figure 1 A schematic diagram of the connection structure of a fixture frame, a fixed clamping plate, and a movable clamping plate of a nickel-hydrogen battery measuring fixture provided in an embodiment of the present utility model;

[0033] Figure 2 for Figure 1 Schematic diagram of the connection structure between the built-in slider and the electrode terminal panel;

[0034] Figure 3 for Figure 1 An enlarged structural diagram of the middle fixture frame and the fixed splint;

[0035] Figure 4 for Figure 1 An enlarged structural diagram of the middle fixture frame and the movable splint;

[0036] Figure 5 for Figure 4 Schematic diagram of the decomposition structure;

[0037] Figure 6 This is a schematic structural diagram of a binding strap for a nickel-hydrogen battery measuring fixture provided by an embodiment of the present utility model.

[0038] Description of reference numerals:

[0039] 10. Clamp frame; 11. Universal wheel; 12. Slide; 13. Serrated slot; 14. Fixing port; 15. Buckle fixing port;

[0040] 20. Fixed splint; 21. Vertical portion; 22. Horizontal portion; 23. First chute; 24. Second chute; 25. Adjustment hole; 26. L-shaped protrusion; 27. Power indicator light;

[0041] 30. Movable splint; 31. Sawtooth block;

[0042] 40. Electrode terminal; 41. Electrode terminal panel; 42. Built-in slider; 43. Threaded hole for built-in slider; 45. Fixing nut; 46. Circular protrusion; 47. Spring; 48. Guide block;

[0043] 50. Strap; 51. Fixed port; 52. Buckle. DETAILED DESCRIPTION

[0044] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0046] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal" and similar expressions used in this article are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] See also Figure 1-5 As shown;

[0049] The nickel-hydrogen battery measuring fixture described in the embodiment of the present utility model includes:

[0050] The fixture frame 10 has universal wheels 11 installed at the corners of the bottom surface of the fixture frame 10. The universal wheels 11 have a self-locking function to prevent them from moving during the inspection process. They can facilitate the movement of large and heavy batteries, avoid bumps during battery transportation, and reduce manpower consumption.

[0051] A fixed splint 20, the fixed splint 20 being provided at one end of the top surface of the fixture frame 10;

[0052] A movable clamping plate 30 is provided at the other end of the top surface of the clamp frame 10. The movable clamping plate 30 can move along the length direction of the clamp frame 10, that is, it can move away from and close to the fixed clamping plate to accommodate nickel-hydrogen batteries of different sizes;

[0053] Electrode terminals 40 are provided on the opposite sides of the fixed splint 20 and the movable splint 30. The electrode terminals 40 pass through the through hole in the middle of the electrode terminal panel 41 and extend into the circular hole on the built-in slider 42. The electrode terminal panel 41 is installed on the side of the built-in slider 42. The built-in slider 42 can move along the height direction of the corresponding fixed splint 20 and movable splint 30.

[0054] During specific operation, the distance between the fixed clamping plate 20 and the movable clamping plate 30 is adjusted to adapt to the clamping of nickel-hydrogen batteries of different lengths, and the height of the built-in slider 42 is adjusted to make the electrode terminal 40 adapt to the clamping of nickel-hydrogen batteries of different diameters.

[0055] The electrode terminal 40 is made of copper.

[0056] The fixed splint 20 and the movable splint 30 each have a vertical portion 21 and a horizontal portion 22. The two vertical portions 21 are arranged opposite and parallel to each other. The opposite sides of the two vertical portions 21 are each provided with a first sliding groove 23. The top surfaces of the two vertical portions 21 are each recessed inward to form a second sliding groove 24. The first sliding groove 23 is connected to the second sliding groove 24. The built-in slider 42 can slide in the space formed by the first sliding groove 23 and the second sliding groove 24.

[0057] Two groups of adjustment holes 25 are symmetrically provided on the side surfaces of the two vertical portions 21 that are away from each other. The two groups of adjustment holes 25 are respectively provided on both sides of the corresponding first chute 23 and are provided along the height direction of the vertical portion 21.

[0058] Both ends of the built-in slider 42 are provided with built-in slider threaded holes 43 , and the built-in slider 42 is positioned by screws passing through an adjustment hole 25 and corresponding built-in slider threaded holes 43 .

[0059] An electrode terminal panel threaded hole is provided on the electrode terminal panel 41 corresponding to the position of the built-in slider threaded hole 43, and a fixing nut 45 is installed on the end of the electrode terminal panel threaded hole away from the built-in slider 42, and the fixing nut 45 can be connected to a screw.

[0060] After the nickel-hydrogen battery to be clamped is placed on the clamp frame 10, the height of the electrode terminal 40 is adjusted according to the diameter of the nickel-hydrogen battery, and the screw is passed through the adjustment hole 25 and threadedly connected with the built-in slider threaded hole 43 and the electrode terminal panel threaded hole, and finally fixed by threading with the fixing nut 45 so that the height of the electrode terminal 40 can be adapted to the two electrodes of the nickel-hydrogen battery. Then, the position of the movable splint 30 is adjusted so that the fixed splint 20 and the movable splint 30 clamp the nickel-hydrogen battery and the two electrode terminals 40 are pressed against the two electrodes of the nickel-hydrogen battery.

[0061] The end of the electrode terminal 40 has a circular protrusion 46 , and a spring 47 abuts against the circular protrusion 46 and the electrode terminal panel 41 . The spring 47 is sleeved on the electrode terminal 40 .

[0062] When the fixed clamping plate 20 and the movable clamping plate 30 clamp the nickel-hydrogen battery, the circular protrusion 46 presses against the two electrodes of the nickel-hydrogen battery. The spring 47 can press the circular protrusion 46 against the two electrodes of the nickel-hydrogen battery.

[0063] When the fixed clamping plate 20 and the movable clamping plate 30 clamp the battery tightly, the spring 47 is compressed and the electrode terminal 40 is properly retracted into the circular hole; when the battery is removed, the spring 57 rebounds and the electrode terminal 40 returns to its original position.

[0064] A guide block 48 is formed on the built-in slider 42, which protrudes outward from the middle of the side surface away from the electrode terminal panel 41. The guide block 48 extends into the first slide groove 23 and can slide in the first slide groove 23 to guide the sliding direction of the built-in slider 42 and avoid the built-in slider 42 from sliding and deflecting.

[0065] The top surface of the fixture frame 10 is symmetrically provided with two slide grooves 12. The cross-section of the two slide grooves 12 is L-shaped, and the short sides of the two L-shaped structures are arranged opposite to each other.

[0066] The bottom surfaces of the two horizontal portions 22 each have two symmetrical L-shaped protrusions 26 , and the two L-shaped protrusions 26 are adapted to the corresponding sliding grooves 12 .

[0067] The movable splint 30 and the clamp frame 10 are slidably connected by the sliding cooperation of the L-shaped protrusion 26 and the slide groove 12. The L-shaped protrusion 26 and the slide groove 12 with an L-shaped cross-section are adapted to ensure that the two maintain a sliding connection, and at the same time, the movable splint 30 can be prevented from moving up and down, thereby avoiding the occurrence of loosening of the clamp frame.

[0068] The bottom surface of the horizontal portion 22 of the movable splint 30 is provided with a plurality of sawtooth blocks 31;

[0069] A plurality of serrated slots 13 are respectively provided on the top surface of the clamp frame 10 and on both sides of the two slide grooves 12. The plurality of serrated slots 13 are provided below the movable splint 30, and the length of the plurality of serrated slots 13 is greater than the length of the horizontal portion 22 of the movable splint 30. The plurality of serrated blocks 31 and the serrated slots 13 cooperate to fix the movable splint 30 on the clamp frame 10.

[0070] The height of the horizontal portion 22 of the movable splint 30 is less than the height of the corresponding L-shaped slide groove 12 on the clamp frame 10, and the height difference between the two is greater than the sum of the protrusions of the serrated slot and the serrated block; it can not only ensure that the movable splint 30 will not derail from the vertical direction during actual operation, but also can be slightly lifted upward when the movable splint 30 needs to be adjusted, and dropped and clamped when adjusted to the appropriate position, thereby completing the function of adjusting the distance between the fixed splint 20 and the movable splint 30.

[0071] The position of the movable clamping plate 30 is adjusted according to the length of the nickel-hydrogen battery to be clamped, and is fixed by the cooperation of the serrated clamping block 31 and the serrated clamping groove 13 to avoid displacement of the movable clamping plate 30 during the clamping process, which affects the clamping effect.

[0072] A power-on indicator light 27 is installed on the horizontal portion 22 of the fixed splint 20, and the power-on indicator light 27 is connected to the electrode terminals 40 through wires, and the wires pass through the round holes on the built-in slider 42; that is, the power-on indicator light 27 is connected in series with the two electrode terminals 40; when the circular protrusions 46 on the fixed splint 20 and the movable splint 30 press against the two electrodes of the nickel-hydrogen battery, the two electrode terminals 40 allow current to pass through the power-on indicator light 27 through the wires, and the power-on indicator light 27 lights up, and the battery can work normally at this time. When the power-on indicator light 27 is not always on or does not light up, it means that the battery has poor contact or is not installed properly, which can be corrected in time.

[0073] See also Figure 1 、 6 As shown;

[0074] Two fixing ports 14 are provided on the front side of the clamp frame 10, and a snap fixing port 15 is provided on the rear side of the clamp frame 10 at a position corresponding to the position of the fixing port. A fixing port 51 at the end of the fixing strap 50 is fixed in each fixing port 14, and a plurality of snaps 52 are provided on the end of the strap 50 away from the fixing port 51, and the snaps 52 can be engaged with the corresponding snap fixing ports 15.

[0075] When the nickel-hydrogen battery is placed on the top surface of the clamp frame 10, one electrode contacts the circular protrusion 46 on the fixed clamp plate 20, and the nickel-hydrogen battery can be fixed to the top surface of the clamp frame 10 by two straps 50 to prevent movement. After that, the movable clamp plate 30 can be adjusted so that the fixed clamp plate 20 and the movable clamp plate 30 clamp the nickel-hydrogen battery. At the same time, the power-on indicator light 27 lights up, and subsequent work can be carried out.

[0076] By adjusting different buckles 52 and the buckle fixing ports 15 to fix the battery, the battery to be tested can be fixed and can adapt to different types of batteries, which is more universal.

[0077] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A nickel-hydrogen battery measuring fixture, characterized in that: include: A fixture frame (10), wherein a universal wheel (11) is installed at a corner of the bottom surface of the fixture frame (10); A fixed clamping plate (20), the fixed clamping plate (20) being arranged at one end of the top surface of the clamp frame (10); A movable splint (30), the movable splint (30) being arranged at the other end of the top surface of the clamp frame (10), and the movable splint (30) being movable along the length direction of the clamp frame (10); Electrode terminals (40) are provided on opposite sides of the fixed splint (20) and the movable splint (30). The electrode terminals (40) pass through the through hole in the middle of the electrode terminal panel (41) and extend into the circular hole on the built-in slider (42). The electrode terminal panel (41) is installed on the side of the built-in slider (42). The built-in slider (42) can move along the height direction of the corresponding fixed splint (20) and movable splint (30).

2. The nickel-hydrogen battery measuring fixture according to claim 1, characterized in that: The fixed splint (20) and the movable splint (30) both have a vertical portion (21) and a horizontal portion (22), the two vertical portions (21) are arranged opposite to each other and in parallel, the opposite side surfaces of the two vertical portions (21) are each provided with a first slide groove (23), the top surfaces of the two vertical portions (21) are both recessed inward to form a second slide groove (24), the first slide groove (23) is connected to the second slide groove (24), and the built-in slider (42) can slide in the space formed by the first slide groove (23) and the second slide groove (24); Two groups of adjustment holes (25) are symmetrically arranged on the side surfaces away from each other on the two vertical parts (21), and the two groups of adjustment holes (25) are respectively arranged on both sides of the corresponding first sliding groove (23) and arranged along the height direction of the vertical part (21); Both ends of the built-in slider (42) are provided with built-in slider threaded holes (43), and the built-in slider (42) is positioned by screws passing through an adjustment hole (25) and the corresponding built-in slider threaded holes (43).

3. The nickel-hydrogen battery measuring fixture according to claim 2, characterized in that: An electrode terminal panel threaded hole is provided on the electrode terminal panel (41) at a position corresponding to the built-in slider threaded hole (43), and a fixing nut (45) is installed on the end of the electrode terminal panel threaded hole away from the built-in slider (42), and the fixing nut (45) can be connected to a screw.

4. The nickel-hydrogen battery measuring fixture according to claim 3, characterized in that: The end of the electrode terminal (40) has a circular protrusion (46), and a spring (47) is abutted between the circular protrusion (46) and the electrode terminal panel (41), and the spring (47) is sleeved on the electrode terminal (40).

5. The nickel-hydrogen battery measuring fixture according to claim 4, characterized in that: A guide block (48) protrudes outward from the middle of the side surface of the built-in slider (42) away from the electrode terminal panel (41). The guide block (48) extends into the first slide groove (23) and can slide in the first slide groove (23) to guide the sliding direction of the built-in slider (42) and avoid the occurrence of sliding deviation of the built-in slider (42).

6. The nickel-hydrogen battery measuring fixture according to claim 2, characterized in that: Two slide grooves (12) are symmetrically provided on the top surface of the clamp frame (10), and the cross sections of the two slide grooves (12) are L-shaped structures, with the short sides of the two L-shaped structures being arranged opposite to each other; The bottom surfaces of the two horizontal portions (22) are each provided with two symmetrical L-shaped protrusions (26), and the two L-shaped protrusions (26) are adapted to the corresponding sliding grooves (12).

7. The nickel-hydrogen battery measuring fixture according to claim 2, characterized in that: A plurality of sawtooth blocks (31) are provided on the bottom surface of the horizontal portion (22) of the movable splint (30); A plurality of sawtooth slots (13) are respectively provided on the top surface of the clamp frame (10) and on both sides of the two slide grooves (12); the plurality of sawtooth slots (13) are provided below the movable splint (30); and the length of the plurality of sawtooth slots (13) is greater than the length of the horizontal portion (22) of the movable splint (30); and the plurality of sawtooth blocks (31) cooperate with the sawtooth slots (13) to fix the movable splint (30) on the clamp frame (10).

8. The nickel-hydrogen battery measuring fixture according to claim 2, characterized in that: A power-on indicator light (27) is installed on the horizontal portion (22) of the fixed clamp (20), and the power-on indicator light (27) is connected to two built-in sliders (42) through electric wires; the built-in sliders (42) are electrically connected to the electrode terminal panel (41) and the electrode terminal (40), that is, the power-on indicator light (27) and the two electrode terminal (40) are connected in series.

9. The nickel-hydrogen battery measuring fixture according to claim 1, characterized in that: Two fixing openings (14) are provided on the front side of the clamp frame (10), and a buckle fixing port (15) is provided on the rear side of the clamp frame (10) at a position corresponding to the fixing opening. A fixing port (51) at the end of the binding strap (50) is fixed in each fixing opening (14), and a plurality of buckles (52) are provided on the end of the binding strap (50) away from the fixing port (51), and the buckles (52) can be engaged with the corresponding buckle fixing ports (15).

Images