Buckling and stabilizing device for radiator

Abstract

The utility model discloses a buckling and stabilizing device for a radiator, which relates to the technical field of radiators and comprises a stabilizing base. A heat dissipation base is arranged in the stable base, a radiator is fixedly arranged in the heat dissipation base, a fixing frame is arranged at the top of the radiator and connected with the stable base through a buckling assembly, a buckling piece is arranged on the outer side of the buckling assembly, and a buckling piece is arranged at the top of the fixing frame. The buckling piece, the buckling assembly and the buckling piece are used in cooperation. A square groove matched with the heat dissipation base is formed in the middle of the stable base, connecting supporting legs are fixedly connected to the four corners of the top of the stable base, and first buckling holes are formed in the middles of the connecting supporting legs, so that the heat dissipation device can be buckled and fixed, the occupied area is small, collision interference with other electronic elements is not likely to happen, and mounting and dismounting are convenient; operation is simple and reliable, the function of the radiator can be fully achieved, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of radiators, in particular to a buckling and stabilizing device for radiators. Background Art

[0002] High-power electronic components such as computer central processing units, north bridge chips, and graphics cards generate a lot of heat when they are running. If this heat cannot be effectively dissipated, it will directly cause the temperature to rise sharply, seriously affecting the normal operation of the electronic components. To ensure the normal operation of electronic components, radiators are usually installed on the electronic components to assist in heat dissipation. To ensure that the radiator is in good condition and in close contact with the electronic components, various fastening devices are often used to fix the radiator on the electronic components.

[0003] The existing snap-fitting and stabilizing devices for heat sinks occupy a large installation space when the snap-fitting frame is tilted and pivoted in the vertical direction. When the heat sink is surrounded by various electronic components, it will easily collide and interfere with these electronic components. Therefore, it is inconvenient to operate and use, and it is not easy to assemble and disassemble. The electronic components cannot fully and reliably contact the heat sink, which is not conducive to its stable heat dissipation. For this reason, we propose a snap-fitting and stabilizing device for the heat sink. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a snap-fitting and stabilizing device for a radiator, which can snap-fit ​​and fix the radiator, occupies a small area, is not prone to collision and interference with other electronic components, is easy to install and disassemble, is simple and reliable to operate, can give full play to the role of the radiator, is easy to use, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: A buckling and stabilizing device for a radiator comprises a stabilizing base;

[0006] A heat dissipation base is provided inside the stable base, a radiator is fixed inside the heat dissipation base, a fixing frame is provided on the top of the radiator, the fixing frame is connected to the stable base through a buckle assembly, a buckle sheet is provided on the outside of the buckle assembly, a buckle piece is provided on the top of the fixing frame, and the buckle sheet, the buckle assembly and the buckle piece are used in coordination;

[0007] A square groove adapted to the heat dissipation base is provided in the middle of the stable base, connecting legs are fixedly connected to the four corners of the top of the stable base, a snap-fit ​​hole is provided in the middle of the connecting legs, and clamping holes penetrating the inner wall of the stable base are provided on both the left and right sides of the stable base.

[0008] The square groove in the middle of the stable base corresponds to the heat dissipation base, which can facilitate the heat dissipation base to be placed inside the stable base for easy installation. The buckle hole in the middle of the connecting leg is used to connect the buckle assembly, and the card hole is used to cooperate with the heat dissipation base.

[0009] Furthermore, rectangular grooves are provided on the left and right sides of the heat dissipation base, a cylindrical compression spring is fixedly provided on the inner wall of the rectangular groove, the cylindrical compression spring is fixedly connected to the limit block, the side wall of the limit block is slidably connected to the inner wall of the rectangular groove, and the limit block is used in conjunction with the card hole.

[0010] The rectangular groove is used to fix the cylindrical compression spring, and the cylindrical compression spring is used to cooperate with the limit card block to move inward or outward. The limit card block is used in conjunction with the card hole to make the heat sink base tightly clamped inside the stable base. When the heat sink base is lowered into the stable base, the rounded corner on the outside of the limit card block is subjected to the extrusion force and transmitted inward to the cylindrical compression spring. The cylindrical compression spring is compressed until the card hole. The cylindrical compression pushes the limit card block out and clamps it with the inner wall of the card hole, which can fix the radiator and facilitate subsequent buckling and fixation.

[0011] Furthermore, a circular hole is opened on the upper side of the fixing frame, and two symmetrically distributed arc-shaped limit plates are fixedly connected to the upper side of the circular hole. Two snap-fit ​​holes are opened at the four corners of the top of the fixing frame, and two elastic hooks are fixedly connected to the lower side of the fixing frame, and the spacing between the two elastic hooks is equal to the width of the radiator.

[0012] The circular hole is used to transfer heat to the electronic components on the top, the arc-shaped limit plate is used for matching limit, and the distance between the two elastic hooks is equal to the width of the radiator. The elastic hooks can be closely attached to the heat sink in the radiator to facilitate subsequent buckling and fixing.

[0013] Furthermore, the snap-fit ​​assembly includes a snap-fit ​​base, a snap-fit ​​wall and a snap-fit ​​barb. The snap-fit ​​assembly includes a snap-fit ​​base in the middle, the snap-fit ​​base is fixedly connected to the snap-fit ​​wall on the front and back sides, a bend is provided at the connection between the snap-fit ​​base and the snap-fit ​​wall, the snap-fit ​​barb is fixedly connected to the bottom of the snap-fit ​​wall, and the snap-fit ​​barb is used in conjunction with the snap-fit ​​hole.

[0014] The snap-fit ​​base is used to fix the snap-fit ​​wall, the snap-fit ​​wall is used to fix the snap-fit ​​hook, the snap-fit ​​hook is used to connect the stable base, and the snap-fit ​​hook and the snap-fit ​​hole are used together to connect the stable base and the fixing frame.

[0015] Furthermore, a limiting groove is provided on the side of the buckling piece, the limiting groove is plugged into the buckling base and plugged into the middle position of the buckling base, and a gradual sliding groove is provided on the top of the buckling piece, and the end of the gradual sliding groove is a retaining wall.

[0016] The limiting groove is plugged into the buckle base and plugged into the middle position of the buckle base, so that the buckle assembly can be used in conjunction with the buckle piece, the gradient slide groove is used in conjunction with the triangular protrusion, and the retaining wall is used to limit the sliding position of the triangular protrusion, which is conducive to fixing the radiator.

[0017] Furthermore, two symmetrically distributed arc plates are fixedly connected to the top of the buckle, the diameter of the arc plates is larger than the diameter of the arc limiting plates, bosses are fixedly connected to both ends of the top of the arc plates, positioning holes are provided on the upper side of the bosses, and two symmetrically distributed triangular protrusions are fixedly connected to the edge of the outer wall on the upper side of the buckle.

[0018] The arc plate is used in conjunction with the arc limit plate to limit the electronic component, the boss is used in conjunction with the gradient slide groove, and the positioning hole is used to position the electronic component. After the heat dissipation base is fixed on the stable base, the fixing frame is placed on the upper side of the radiator, and at the same time, the elastic hook is closely attached to the heat dissipation fin in the radiator, and then the snap-fit ​​wall and the snap-fit ​​barb are passed through the snap-fit ​​hole 2, and then the limiting groove of the side wall of the snap-fit ​​piece is plugged with the snap-fit ​​base and plugged into the middle position of the snap-fit ​​base, and then the snap-fit ​​piece is sleeved on the upper side of the arc limit plate, and then the snap-fit ​​piece is rotated, and the triangular protrusion rotates accordingly, and the triangular protrusion rotates into the gradient slide groove and starts to rotate slowly until the triangular protrusion contacts the retaining wall, and then reaches a fixed state, and finally the snap-fit ​​barb is hooked into the snap-fit ​​hole 1, so that the radiator can be snapped and fixed, which occupies a small area, is not easy to collide and interfere with other electronic components, is easy to install and disassemble, is simple and reliable to operate, and can give full play to the role of the radiator, and is easy to use.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the buckling and stabilizing device for the radiator has the following advantages:

[0020] 1. The rectangular groove is used to fix the cylindrical compression spring. The cylindrical compression spring is used to cooperate with the limit card block to move inward or outward. The limit card block is used in conjunction with the card hole to make the heat sink base tightly clamped inside the stable base. When the heat sink base is lowered into the stable base, the outer rounded corner of the limit card block is squeezed and transmitted inward to the cylindrical compression spring. The cylindrical compression spring is compressed until the card hole. The cylindrical compression pushes the limit card block out and clamps it with the inner wall of the card hole, which can fix the radiator and facilitate subsequent buckling and fixation.

[0021] 2. The round hole is used to transfer heat to the electronic components on the top, and the arc-shaped limit plate is used for matching the limit. The distance between the two elastic hooks is equal to the width of the radiator. The elastic hooks can be closely attached to the heat sink in the radiator to facilitate subsequent buckling and fixing.

[0022] 3. The arc plate is used in conjunction with the arc limit plate to limit the electronic components, the boss is used in conjunction with the gradient slide groove, and the positioning hole is used to position the electronic components. After the heat dissipation base is fixed on the stable base, the fixing frame is placed on the upper side of the radiator, and the elastic hook is closely attached to the heat dissipation fin in the radiator, and then the snap-fit ​​wall and the snap-fit ​​barb are passed through the snap-fit ​​hole 2, and then the limiting groove of the side wall of the snap-fit ​​sheet is plugged with the snap-fit ​​base and plugged in the middle position of the snap-fit ​​base, and then the snap-fit ​​piece is sleeved on the upper side of the arc limit plate, and then the snap-fit ​​piece is rotated, and the triangular protrusion rotates accordingly, and the triangular protrusion rotates into the gradient slide groove and starts to rotate slowly until the triangular protrusion contacts the retaining wall, and then reaches a fixed state, and finally the snap-fit ​​barb is hooked into the snap-fit ​​hole 1, the radiator can be snapped and fixed, which occupies a small area, is not easy to collide and interfere with other electronic components, is easy to install and disassemble, is simple and reliable to operate, and can give full play to the role of the radiator, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model.

[0024] Figure 2 It is a schematic diagram of a structurally stable base of the utility model.

[0025] Figure 3 It is a schematic diagram of the buckle piece of the utility model structure.

[0026] Figure 4 This is a schematic diagram of the heat dissipation base of the utility model structure.

[0027] In the figure: 1 a stable base, 11 connecting legs, 12 a first snap-fit ​​hole, 13 a card hole, 2 a fixing frame, 21 a round hole, 22 an arc-shaped limiting plate, 23 a second snap-fit ​​hole, 24 an elastic hook, 3 a first snap-fit ​​component, 31 a snap-fit ​​base, 32 a snap-fit ​​wall, 33 a snap-fit ​​barb, 4 a snap-fit ​​piece, 41 a limiting groove, 42 a gradient slide groove, 43 a retaining wall, 5 a heat dissipation base, 51 a heat sink, 52 a rectangular groove, 53 a limiting card block, 6 a second snap-fit ​​component, 61 an arc-shaped plate, 62 a boss, 63 a positioning hole, 64 a triangular boss. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4 , this embodiment provides a technical solution: a buckling and stabilizing device for a heat sink includes a stabilizing base 1;

[0030] A heat dissipation base 5 is provided inside the stable base 1, a heat sink 51 is fixed inside the heat dissipation base 5, a fixing frame 2 is provided on the top of the heat sink 51, the fixing frame 2 is connected to the stable base 1 through a buckle assembly 3, a buckle sheet 4 is provided on the outside of the buckle assembly 3, a buckle piece 6 is provided on the top of the fixing frame 2, and the buckle sheet 4, the buckle assembly 3 and the buckle piece 6 are used in conjunction with each other;

[0031] A square groove adapted to the heat dissipation base 5 is opened in the middle of the stable base 1, and connecting legs 11 are fixedly connected to the four corners of the top of the stable base 1. A buckling hole 12 is opened in the middle of the connecting leg 11, and card holes 13 penetrating the inner wall of the stable base 1 are opened on both sides of the stable base 1.

[0032] The square groove in the middle of the stable base 1 corresponds to the heat dissipation base 5, which can facilitate the heat dissipation base 5 to be placed inside the stable base 1 for easy installation. The buckle hole 12 in the middle of the connecting leg 11 is used to connect the buckle assembly 3, and the card hole 13 is used for use with the heat dissipation base 5.

[0033] Among them, rectangular grooves 52 are opened on the left and right sides of the heat dissipation base 5, and a cylindrical compression spring is fixedly provided on the inner wall of the rectangular groove 52. The cylindrical compression spring is fixedly connected to the limit block 53, and the side wall of the limit block 53 is slidably connected to the inner wall of the rectangular groove 52. The limit block 53 is used in conjunction with the card hole 13.

[0034] The rectangular groove 52 is used to fix the cylindrical compression spring, and the cylindrical compression spring is used to cooperate with the limit block 53 to move inward or outward. The limit block 53 is used in conjunction with the clamping hole 13, so that the heat dissipation base 5 can be tightly clamped inside the stable base 1. When the heat dissipation base 5 is lowered into the stable base 1, the outer rounded corner of the limit block 53 is subjected to the extrusion force and transmitted inward to the cylindrical compression spring. The cylindrical compression spring is compressed until the clamping hole 13, and the cylindrical compression pushes the limit block 53 out and clamps it to the inner wall of the clamping hole 13, so that the radiator 31 can be fixed, which is convenient for subsequent buckling and fixation.

[0035] A circular hole 21 is provided on the upper side of the fixing frame 2, and two symmetrically distributed arc-shaped limit plates 22 are fixedly connected to the upper side of the circular hole 21. The four corners of the top of the fixing frame 2 are provided with snap-fit ​​holes 23. Two elastic hooks 24 are fixedly connected to the lower side of the fixing frame 2, and the spacing between the two elastic hooks 24 is equal to the width of the radiator.

[0036] The circular hole 21 is used to transfer heat to the electronic components on the top, the arc-shaped limiting plate 22 is used for matching limiting, and the spacing between the two elastic hooks 24 is equal to the width of the radiator. The elastic hooks 24 can be closely attached to the heat sink in the radiator to facilitate subsequent buckling and fixing.

[0037] The snap-fit ​​assembly 3 includes a snap-fit ​​base 31, a snap-fit ​​wall 32 and a snap-fit ​​barb 33. The snap-fit ​​base 31 is in the middle of the snap-fit ​​assembly 3, and the snap-fit ​​wall 32 is fixedly connected to the front and rear sides of the snap-fit ​​base 31. A bend is provided at the connection between the snap-fit ​​base 31 and the snap-fit ​​wall 32, and the snap-fit ​​barb 33 is fixedly connected to the bottom of the snap-fit ​​wall 32, and the snap-fit ​​barb 33 is used in conjunction with the snap-fit ​​hole 12.

[0038] The snap-fit ​​base 31 is used to fix the snap-fit ​​wall 32, the snap-fit ​​wall 32 is used to fix the snap-fit ​​hook 33, the snap-fit ​​hook 33 is used to connect the stable base 1, and the snap-fit ​​hook 33 is used in conjunction with the snap-fit ​​hole 12 to connect the stable base 1 and the fixing frame 2.

[0039] A limiting groove 41 is formed on the side of the buckling piece 4, and the limiting groove 41 is plugged into the buckling base 31 and plugged into the middle position of the buckling base 31. A gradual sliding groove 42 is formed on the top of the buckling piece 4, and the end of the gradual sliding groove 42 is a retaining wall 43.

[0040] The limiting groove 41 is plugged into the buckling base 31 and plugged into the middle position of the buckling base 31, so that the buckling assembly 3 can be used in conjunction with the buckling part 6, the gradual sliding groove 42 is used in conjunction with the triangular protrusion 64, and the retaining wall 43 is used to limit the sliding position of the triangular protrusion 64, which is conducive to fixing the radiator.

[0041] Two symmetrically distributed arc plates 61 are fixedly connected to the top of the buckle 6. The diameter of the arc plate 61 is larger than the diameter of the arc limiting plate 22. Bosses 62 are fixedly connected to both ends of the top of the arc plate 61. A positioning hole 63 is opened on the upper side of the boss 62. Two symmetrically distributed triangular protrusions 64 are fixedly connected to the edge of the outer wall on the upper side of the buckle 6.

[0042] The arc plate 61 is used in conjunction with the arc limiting plate 22 to limit the electronic components, the boss 62 is used in conjunction with the gradient slide groove 42, and the positioning hole 63 is used to position the electronic components. After the heat dissipation base 5 is fixed to the stable base 1, the fixing frame 2 is placed on the upper side of the radiator 31, and the elastic hook piece 24 is closely attached to the heat sink in the radiator, and then the buckling wall 32 and the buckling barb 33 are passed through the buckling hole 23, and then the limiting groove 41 of the side wall of the buckling piece 4 is plugged into the buckling base 31 and plugged into the middle position of the buckling base 31. , and then the buckle piece 6 is sleeved on the upper side of the arc-shaped limiting plate 22. At this time, the buckle piece 6 is rotated, and the triangular protrusion 64 rotates accordingly. The triangular protrusion 64 rotates into the gradual sliding groove 42 and starts to rotate slowly until the triangular protrusion 64 contacts the retaining wall 43. At this time, it reaches a fixed state, and finally the buckle hook 33 is hooked into the buckle hole 12. The radiator can be buckled and fixed, with a small footprint, not easy to collide and interfere with other electronic components, and easy to install and disassemble. The operation is simple and reliable, and the function of the radiator can be fully utilized, which is easy to use.

[0043] The working principle of a buckling and stabilizing device for a radiator provided by the utility model is as follows: the square groove in the middle of the stable base 1 corresponds to the heat dissipation base 5, so that the heat dissipation base 5 can be placed inside the stable base 1 for easy installation. The buckling hole 12 in the middle of the connecting leg 11 is used to connect the buckling component 3, the clamping hole 13 is used in conjunction with the heat dissipation base 5, the rectangular groove 52 is used to fix the cylindrical compression spring, and the cylindrical compression spring is used to cooperate with the limit clamping block 53 to move inward or outward. The limit clamping block 53 is used in conjunction with the clamping hole 13, so that the heat dissipation base 5 is tightly clamped inside the stable base 1. When the heat dissipation base 5 is placed downward into the stable base 1, the outer rounded corner of the limit clamping block 53 is squeezed to The inner side is transmitted to the cylindrical compression spring, and the cylindrical compression spring is compressed until the card hole 13. The cylindrical compression pushes out the limit card block 53 and snaps into the inner wall of the card hole 13, so that the heat sink 31 can be fixed, which is convenient for subsequent buckling and fixing. The circular hole 21 is used to transfer heat to the electronic components on the top, and the arc-shaped limit plate 22 is used for matching the limit. The spacing between the two elastic hooks 24 is equal to the width of the radiator, so that the elastic hook 24 can be closely attached to the heat sink in the radiator, which is convenient for subsequent buckling and fixing. The buckling base 31 is used to fix the buckling wall 32, and the buckling wall 32 is used to fix the buckling hook 33. The buckling hook 33 is used to connect the stable base 1, and the buckling hook 33 is used in conjunction with the buckling hole 12 to stabilize the base 1. The base 1 and the fixing frame 2 are connected, the limiting groove 41 is plugged into the buckling base 31 and plugged into the middle position of the buckling base 31, the buckling assembly 3 can be used in conjunction with the buckling member 6, the gradient slide groove 42 is used to cooperate with the triangular protrusion 64, the retaining wall 43 is used to limit the sliding position of the triangular protrusion 64, which is conducive to fixing the radiator, the arc plate 61 is used in conjunction with the arc limiting plate 22, and the electronic component can be limited, the boss 62 is used to cooperate with the gradient slide groove 42, and the positioning hole 63 is used for positioning the electronic component. After the heat dissipation base 5 is fixed to the stable base 1, the fixing frame 2 is placed on the upper side of the radiator 31, and the elastic hook 24 is closely attached to the heat sink in the radiator, and then the buckling wall 3 is fixed. 2 and the buckling hook 33 pass through the buckling hole 23, then the limiting groove 41 of the side wall of the buckling piece 4 is plugged with the buckling base 31 and plugged in the middle position of the buckling base 31, and then the buckling piece 6 is sleeved on the upper side of the arc-shaped limiting plate 22. At this time, the buckling piece 6 is rotated, and the triangular protrusion 64 rotates accordingly. The triangular protrusion 64 rotates into the gradual sliding groove 42 and starts to rotate slowly until the triangular protrusion 64 contacts the retaining wall 43. At this time, it reaches a fixed state, and finally the buckling hook 33 is hooked into the buckling hole 12, which can buckle and fix the radiator. It occupies a small area, is not easy to collide and interfere with other electronic components, is easy to install and disassemble, is simple and reliable to operate, can give full play to the role of the radiator, and is easy to use.

[0044] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A buckling and stabilizing device for a radiator, characterized in that: comprising a stable base (1); A heat dissipation base (5) is provided inside the stable base (1), a radiator (51) is fixedly provided inside the heat dissipation base (5), a fixing frame (2) is provided on the top of the radiator (51), the fixing frame (2) is connected to the stable base (1) via a buckle assembly (3), a buckle sheet (4) is provided on the outside of the buckle assembly (3), a buckle piece (6) is provided on the top of the fixing frame (2), and the buckle sheet (4), the buckle assembly (3) and the buckle piece (6) are used in coordination; A square groove adapted to the heat dissipation base (5) is provided in the middle of the stable base (1), connecting legs (11) are fixedly connected to the four corners of the top of the stable base (1), a buckle hole (12) is provided in the middle of the connecting leg (11), and a clamping hole (13) penetrating the inner wall of the stable base (1) is provided on both the left and right sides of the stable base (1).

2. The buckling and stabilizing device for a heat sink according to claim 1, characterized in that: The heat dissipation base (5) is provided with rectangular grooves (52) on the left and right sides, the inner wall of the rectangular groove (52) is fixedly provided with a cylindrical compression spring, the cylindrical compression spring is fixedly connected to a limit clamping block (53), the side wall of the limit clamping block (53) is slidably connected to the inner wall of the rectangular groove (52), and the limit clamping block (53) is used in conjunction with the clamping hole (13).

3. The buckling and stabilizing device for a heat sink according to claim 1, characterized in that: A circular hole (21) is provided on the upper side of the fixing frame (2), and two symmetrically distributed arc-shaped limiting plates (22) are fixedly connected to the upper side of the circular hole (21). Four corners of the top of the fixing frame (2) are provided with second snap-fitting holes (23). Two elastic hooks (24) are fixedly connected to the lower side of the fixing frame (2), and the spacing between the two elastic hooks (24) is equal to the width of the radiator.

4. The buckling and stabilizing device for a heat sink according to claim 1, characterized in that: The buckling assembly (3) comprises a buckling base (31), a buckling wall (32) and a buckling hook (33). The buckling base (31) is located in the middle of the buckling assembly (3). The buckling wall (32) is fixedly connected to the front and rear sides of the buckling base (31). A bend is provided at the connection between the buckling base (31) and the buckling wall (32). The bottom of the buckling wall (32) is fixedly connected to the buckling hook (33). The buckling hook (33) is used in conjunction with the buckling hole (12).

5. The buckling and stabilizing device for a heat sink according to claim 1, characterized in that: A limiting groove (41) is provided on the side of the buckling piece (4), and the limiting groove (41) is plugged into the buckling base (31) and plugged into the middle position of the buckling base (31). A gradual sliding groove (42) is provided on the top of the buckling piece (4), and the end of the gradual sliding groove (42) is a retaining wall (43).

6. The buckling and stabilizing device for a heat sink according to claim 1, characterized in that: Two symmetrically distributed arc plates (61) are fixedly connected to the top of the buckle member (6), the diameter of the arc plate (61) is larger than the diameter of the arc-shaped limiting plate (22), bosses (62) are fixedly connected to both ends of the top of the arc plate (61), a positioning hole (63) is provided on the upper side of the boss (62), and two symmetrically distributed triangular protrusions (64) are fixedly connected to the edge of the outer wall on the upper side of the buckle member (6).

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