Airtight powder box

Abstract

The utility model relates to the technical field of cosmetic containers, in particular to an airtight powder box which comprises a bottom box, a box cover, a rotating shaft, an inner cover and an inner box, a rotating groove is formed in one side of the bottom box, an adapter block is arranged on the bottom face of one side of the box cover, a cover opening and closing movable cavity is formed in the middle of the adapter block, and the rotating shaft is arranged on the bottom box and penetrates through the rotating groove. The rotating shaft penetrates through the opening and closing cover moving cavity, the opening and closing cover moving cavity comprises a covering clamping hole, a through groove and an uncovering clamping hole which are communicated in sequence, the rotating shaft can be clamped with the covering clamping hole or the uncovering clamping hole, the inner diameter of the covering clamping hole is equal to that of the uncovering clamping hole, the diameter of the rotating shaft is not larger than that of the covering clamping hole, and the width of the through groove is smaller than that of the rotating shaft; the adapter block is movably arranged in the rotating groove; when the rotating shaft is clamped in the covering clamping hole, the inner box is covered with the inner cover, the bottom box is covered with the box cover, and the covering face of the box cover is tightly attached to the top end face of the bottom box. Through the cooperation of the opening and closing cover moving cavity and the rotating shaft, the stability of the opening and closing cover is good, and the air tightness in the covering state is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to cosmetic container technical field especially is a kind of airtight powder box. BACKGROUND

[0002] Powder box is used to store the powder raw material for beautifying face in daily life, generally all powder box includes bottom box, bottom box is provided with containing cavity, bottom box is rotatably connected with the inner cover for sealing the containing cavity, bottom box is also rotatably provided with outer cover, containing cavity is used to load powder raw material.For example: in prior art, the Chinese patent document with application number 201620609365.9 discloses a cosmetic powder box, including outer box, outer cover that forms containing cavity with outer box, inner powder box that is arranged in the containing cavity, inner cover that forms cavity with the inner powder box;The outer box and the inner powder box are respectively provided with clamping parts that cooperate with each other;The bottom of the outer box is provided with a through hole.In addition, the Chinese patent document with application number 202322929199.3 discloses an airtight powder box, including inner container assembly, the inner container assembly includes flip cover disc, pull ring, pull block, sealing ring, two grooves, inner container bottom, mounting groove, silica gel gasket, sealing ring, inclined plane, inner cover and mounting ring;The upper surface of the sealing ring is fixedly connected to the lower surface of the flip cover disc, the inclined plane is opened in the inner side wall bottom of the sealing ring, the pull block is fixedly connected to the inner side wall of the pull ring, two the grooves are symmetrically opened in the outer side wall of the sealing ring, the mounting groove is opened in the upper surface of the inner container bottom, the lower surface of the mounting ring is fixedly connected to the inner bottom wall of the mounting groove, the inner cover is connected to the inner side wall of the mounting groove, the lower surface of the silica gel gasket is fixedly connected to the upper surface of the mounting ring, the sealing ring is fixedly connected to the upper surface of the mounting ring, the lower surface of the flip cover disc is attached to the upper surface of the inner container bottom.

[0003] Although the above-mentioned patent documents have good airtightness through the covering of inner cover, when opening the cover, the outer cover needs to be opened first and then the inner cover needs to be opened;When closing the cover, the inner cover needs to be closed first and then the outer cover needs to be closed;The operation steps in the whole process are complicated, and the stability of the opened inner cover and outer cover is poor, which is easy to shake, and even the cover is closed or opened unintentionally, which is not conducive to the user to conveniently make up, resulting in poor user experience.

[0004] Therefore, the defect is obvious, and a solution is needed. UTILITY MODEL CONTENT

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an airtight powder box.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a kind of airtight powder box, it includes bottom box, box cover, rotating shaft, inner cover and inner box, inner box is embedded in the center position of bottom box, inner cover is arranged in the inner wall center position of box cover, inner cover is used to cover inner box, one side of bottom box is provided with rotating groove, the bottom surface of one side of box cover is provided with adapter block, the middle part of adapter block is provided with open and close cover movable cavity, rotating shaft is installed in bottom box and penetrates rotating groove, rotating shaft penetrates open and close cover movable cavity, open and close cover movable cavity includes cover and close clamping hole, through slot and open and close clamping hole in turn, rotating shaft can be clamped with cover and close clamping hole or open and close clamping hole, the inner diameter of cover and close clamping hole and the inner diameter of open and close clamping hole are equal, the diameter of rotating shaft is not greater than the inner diameter of cover and close clamping hole, the slot width of through slot is less than the diameter of rotating shaft, adapter block is movably arranged in rotating groove;When rotating shaft is clamped in cover and close clamping hole, inner cover covers inner box, box cover covers bottom box, the cover surface of box cover and the top end surface of bottom box are closely combined.

[0008] Further, the outer side wall of the inner cover and the inner side wall of the box cover surround an outer circular ring groove, the adapter block integrally connects an outer circular ring, the outer circular ring is contained in the outer circular ring groove, and the outer circular ring is rotationally connected with the box cover.

[0009] Further, the inner side wall of the inner cover is provided with an inner rotating structure, and the outer side wall of the inner box is provided with an outer rotating structure, the inner rotating structure is used for screwing with the outer rotating structure.

[0010] Further, the inner rotating structure includes at least two inner rotating blocks arranged in an annular array on the inner side wall of the inner cover, and the outer rotating structure includes at least two outer rotating blocks arranged in an annular array on the outer side wall of the inner box, one inner rotating block is screwed with one outer rotating block.

[0011] Further, the bottom surface of the outer rotating block is provided with an inclined downward rotating guide surface, the bottom end of the rotating guide surface is protrudingly provided with a blocking block downward, and the blocking block is used for blocking the inner rotating block; the cover space for the inner rotating block to pass through is formed between the blocking blocks of the adjacent two outer rotating blocks, and the inner rotating block rotates between the blocking blocks of the adjacent two outer rotating blocks.

[0012] Further, the middle part of the inner rotating block is recessed with a clamping groove, the outer side wall of the inner box is provided with a clamping protrusion, the clamping protrusion is located below the rotating guide surface, the clamping protrusion is arranged at a distance from the corresponding blocking block, and the clamping groove is used for clamping with the clamping protrusion.

[0013] Further, the inside of the box cover is provided with an inner circular ring groove and a rotating groove communicated with the inner circular ring groove and the outer circular ring groove, the inner circular ring groove and the outer circular ring groove are coaxial and equal in diameter, the inner circular ring is contained in the inner circular ring groove, the top of the outer circular ring is provided with a connecting piece, the connecting piece is connected with the inner circular ring after penetrating the rotating groove, and the connecting piece can rotate along the rotating groove.

[0014] Further, the box cover includes a cover body and a cover plate, the top surface of the cover body is recessed with a containing cavity, the inner circular ring groove is recessed from the bottom wall of the containing cavity, and the cover plate is embedded in the containing cavity, and the cover plate encapsulates the inner circular ring in the inner circular ring groove.

[0015] Further, the inner top surface of the inner cover is attached with a sealing gasket, which is used to seal the top port of the inner box.

[0016] Further, the adapter block is provided with a mounting hole, and a dismounting block is detachably mounted in the mounting hole.

[0017] The gas-tight powder box has the advantages that when the gas-tight powder box is in the closed state, the closed clamping hole is located above the opening clamping hole, the inner cover closes the inner box to package the objects loaded in the inner box, the box cover closes the bottom box, the closing surface of the box cover is tightly attached to the top surface of the bottom box, the rotating shaft is clamped in the closed clamping hole, the closed clamping hole pulls the rotating shaft, the rotating shaft cannot easily shake up and down because the diameter of the rotating shaft is larger than the slot width of the through slot, the closing firmness and tightness are improved, and the gas-tightness of the powder box for loading objects is good. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 4 is a perspective view of the gas-tight powder box in the closed state.

[0019] Figure 2 Fig. 5 is a sectional view of the gas-tight powder box.

[0020] Figure 3 Fig. 6 is a perspective view of the box cover, the adapter block, the inner cover, and the outer ring of the gas-tight powder box.

[0021] Figure 4 Fig. 7 is an exploded view of the box cover, the adapter block, the inner cover, the inner ring, and the outer ring of the gas-tight powder box.

[0022] Figure 5 Fig. 8 is a perspective view of the rotating shaft, the bottom box, and the inner box of the gas-tight powder box.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1. Base box; 2. Cover; 3. Shaft; 4. Inner cover; 5. Inner box; 6. Rotating groove; 7. Adapter block; 8. Opening and closing cover movable cavity; 9. Cover closing latch hole; 10. Through groove; 11. Opening cover latch hole; 12. Outer annular groove; 13. Outer annular ring; 14. Inner rotating block; 15. Outer rotating block; 16. Guide rotating surface; 17. Blocking block; 18. Slot; 19. Slot protrusion; 20. Inner annular groove; 21. Rotating groove; 22. Inner annular ring; 23. Connector; 24. Cover body; 25. Cover plate; 26. Cavity; 27. Sealing gasket; 28. Mounting hole; 29. ​​Disassembly and assembly block; 30. Slot; 31. Insert block. Detailed Implementation

[0025] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0026] like Figures 1 to 5 As shown, this utility model provides an airtight powder box, which includes a base box 1, a lid 2, a rotating shaft 3, an inner lid 4, and an inner box 5. The inner box 5 is embedded in the center of the base box 1, and the inner lid 4 is located in the center of the inner wall of the lid 2. The inner lid 4 is used to close the inner box 5. A rotating groove 6 is provided on one side of the base box 1, and a connecting block 7 is provided on the bottom surface of one side of the lid 2. An opening and closing cavity 8 is provided in the middle of the connecting block 7. The rotating shaft 3 is installed in the base box 1 and passes through the rotating groove 6. The rotating shaft 3 passes through the opening and closing cavity 8. The device includes a cover locking hole 9, a through groove 10, and an open cover locking hole 11 connected in sequence. The rotating shaft 3 can engage with either the cover locking hole 9 or the open cover locking hole 11. The inner diameter of the cover locking hole 9 and the inner diameter of the open cover locking hole 11 are equal. The diameter of the rotating shaft 3 is not greater than the inner diameter of the cover locking hole 9. The width of the through groove 10 is smaller than the diameter of the rotating shaft 3. The adapter block 7 is movably disposed in the rotating groove 6. When the rotating shaft 3 is engaged in the cover locking hole 9, the inner cover 4 covers the inner box 5, and the box cover 2 covers the bottom box 1. The covering surface of the box cover 2 is tightly fitted with the top surface of the bottom box 1.

[0027] In practical application, when the airtight powder box is in the closed state, the closed clamping hole 9 is located above the open clamping hole 11, the inner cover 4 closes the inner box 5 to package the articles loaded in the inner box 5, the box cover 2 closes the bottom box 1, the closing surface of the box cover 2 is tightly attached to the top end surface of the bottom box 1, the rotating shaft 3 is clamped in the closed clamping hole 9, and the closed clamping hole 9 tightens the rotating shaft 3. Since the diameter of the rotating shaft 3 is larger than the slot width of the through slot 10, the rotating shaft 3 cannot easily shake up and down, the closing firmness and tightness are improved, and the airtightness of the powder box loaded with articles is good. When the box cover 2 is opened, the box cover 2 can be pulled upward, the box cover 2 is moved upward relative to the bottom box 1, the rotating shaft 3 is separated from the closed clamping hole 9, and then the rotating shaft 3 is moved along the through slot 10 to the open clamping hole 11. The rotating shaft 3 is clamped in the open clamping hole 11, at this time, the box cover 2 is turned outward, the rotating block 7 rotates around the rotating shaft 3 in the rotating groove 6, and the box cover 2 opens the bottom box 1. The utility model cooperates the open and close cover movable cavity 8 with the rotating shaft 3, the stability of the open and close cover is good, and the airtightness of the closed state is good.

[0028] In the embodiment, the outer side wall of the inner cover 4 and the inner side wall of the box cover 2 surround an outer circular ring groove 12, the rotating block 7 is integrally connected with an outer circular ring 13, the outer circular ring 13 is contained in the outer circular ring groove 12, and the outer circular ring 13 is rotationally connected with the box cover 2. When the rotating shaft 3 is clamped in the closed clamping hole 9, the outer circular ring 13 is tightly attached to the top end surface of the bottom box 1. The structure design enables the box cover 2 to rotate relative to the outer circular ring 13, the rotating block 7 and the bottom box 1 after the box cover 2 closes the bottom box 1, and even if the user rotates the box cover 2 by mistake, the box cover 2 will not be opened.

[0029] In the embodiment, the inner side wall of the inner cover 4 is provided with an inner rotating structure, the outer side wall of the inner box 5 is provided with an outer rotating structure, and the inner rotating structure is used for rotating combination with the outer rotating structure. After the box cover 2 and the bottom box 1 are closed, the box cover 2 is rotated, the inner cover 4 is driven to rotate, the inner rotating structure of the rotating inner box 5 is combined with the outer rotating structure of the inner box 5 on the bottom box 1, the box cover 2 and the bottom box 1 are tightly and firmly closed together, and the closing firmness and airtightness are further improved. When the box cover 2 needs to be opened, the box cover 2 is first rotated, the inner rotating structure is separated from the outer rotating structure, the box cover 2 is then pulled upward, the box cover 2 is moved upward relative to the bottom box 1, the rotating shaft 3 is moved from the closed clamping hole 9 to the open clamping hole 11, and then the box cover 2 is turned outward.

[0030] In the embodiment, the inner rotating structure includes at least two inner rotating blocks 14 arranged in an annular array on the inner side wall of the inner cover 4, the outer rotating structure includes at least two outer rotating blocks 15 arranged in an annular array on the outer side wall of the inner box 5, and one inner rotating block 14 is combined with one outer rotating block 15. The structure design is that the inner rotating structure and the outer rotating structure are simple in structure and good in rotating firmness.

[0031] In the embodiment, the bottom surface of the outer rotating block 15 is provided with an inclined downward guide surface 16, the bottom end of the guide surface 16 is provided with a blocking block 17 downwardly protruding, and the blocking block 17 is used for blocking the inner rotating block 14. Adjacent two outer rotating blocks 15 form a covering space for the inner rotating block 14 to pass through, and the inner rotating block 14 rotates between the blocking blocks 17 of the adjacent two outer rotating blocks 15. When it is needed to cover the bottom box 1 with the box cover 2, the box cover 2 is turned downwardly, so that the inner rotating block 14 passes through the covering space, then the box cover 2 is rotated, so that the inner rotating block 14 of the inner cover 4 moves along the guide surface 16 of the outer rotating block 15, the inner rotating block 14 is gradually screwed with the outer rotating block 15, under the extrusion of the downwardly inclined guide surface 16, the box cover 2 moves downwardly relative to the bottom box 1, so that the rotating shaft 3 moves from the uncapping clamping hole 11 to the through slot 10, when one end of the inner rotating block 14 abuts against the blocking block 17 of the guide surface 16, the rotating shaft 3 moves from the through slot 10 to the covering clamping hole 9, and the rotating shaft 3 is clamped in the covering clamping hole 9. At this time, the box cover 2 completely covers the bottom box 1, the covering is firm and has good air tightness. When it is needed to open the box cover 2, the box cover 2 is reversely rotated, so that the inner rotating block 14 is unscrewed from the outer rotating block 15, when the inner rotating block 14 is located at the covering space and abuts against the blocking block 17 of the guide surface 16 of another outer rotating block 15, the box cover 2 is pulled upwardly, so that the box cover 2 moves upwardly relative to the bottom box 1, the rotating shaft 3 moves from the covering clamping hole 9 to the uncapping clamping hole 11 through the through slot 10, and the box cover 2 is turned outwardly, so that the uncapping action is completed.

[0032] In the embodiment, the middle part of the inner rotating block 14 is concavely provided with a clamping groove 18, the outer side wall of the inner box 5 is provided with a clamping protrusion 19, the clamping protrusion 19 is located below the guide surface 16, the clamping protrusion 19 is spaced apart from the corresponding blocking block 17, and the clamping groove 18 is used for clamping the clamping protrusion 19. When the box cover 2 is rotated to the position, one end of the inner rotating block 14 abuts against the blocking block 17 of the guide surface 16, and the clamping groove 18 is clamped with the clamping protrusion 19, so that the box cover 2 is prevented from being easily rotated relative to the bottom box 1, the stability and reliability of the covering are improved, and when the clamping groove 18 is clamped with the clamping protrusion 19, the user feels a jerk, which proves that the covering is in place.

[0033] In the embodiment, the inside of the box cover 2 is provided with an inner circular ring groove 20 and a rotating groove 21 communicated with the inner circular ring groove 20 and the outer circular ring groove 12, the inner circular ring groove 20 is coaxial and equal in diameter with the outer circular ring groove 12, the inner circular ring groove 20 contains an inner circular ring 22, the top of the outer circular ring 13 is provided with a connecting piece 23, the connecting piece 23 is connected with the inner circular ring 22 after penetrating through the rotating groove 21, and the connecting piece 23 can rotate along the rotating groove 21. The structure design prevents the outer circular ring 13 from being easily separated from the box cover 2, ensures that the box cover 2 and the outer circular ring 13 can be relatively rotated, the track length of the rotating groove 21 limits the rotating angle of the box cover 2, and the box cover 2 can only be rotated within a preset angle range.

[0034] In the embodiment, the box cover 2 comprises a cover body 24 and a cover plate 25, the top surface of the cover body 24 is concave to form a containing cavity 26, the inner circular ring groove 20 is concave from the bottom wall of the containing cavity 26, the cover plate 25 is embedded in the containing cavity 26, and the cover plate 25 encapsulates the inner circular ring 22 in the inner circular ring groove 20. The structure design realizes the modular assembly of the box cover 2, is convenient for production and manufacturing, and facilitates the disassembly and assembly of the box cover 2, the inner circular ring 22 and the outer circular ring 13.

[0035] In the embodiment, the inner top surface of the inner cover 4 is attached with a sealing gasket 27, which is used to seal the top port of the inner box 5. When the box cover 2 covers the bottom box 1 and the inner cover 4 covers the inner box 5, the sealing gasket 27 covers and seals the top port of the inner box 5, further improving the air tightness after covering.

[0036] In the embodiment, the adapter block 7 is provided with a mounting hole 28, a dismounting block 29 is detachably arranged in the mounting hole 28, and the opening and closing cover movable cavity 8 is arranged in the dismounting block 29. The structure design detachably connects the adapter block 7 and the dismounting block 29, is convenient for the production and manufacturing of the adapter block 7 and the dismounting block 29, facilitates the processing and forming of the opening and closing cover movable cavity 8, is convenient for dismounting and replacing the dismounting block 29, and when the dismounting block 29 is damaged, only the dismounting block 29 needs to be replaced, thereby reducing the maintenance cost. Of course, the adapter block 7 and the dismounting block 29 can also be integrally arranged.

[0037] Specifically, the inner wall of the mounting hole 28 is concave to form a slot 30, the outer side wall of the dismounting block 29 is convex to form a plug 31, and the plug 31 is inserted into the slot 30; the number of the slots 30 and the number of the plugs 31 are both at least two, and one plug 31 is correspondingly arranged with one slot 30. The plugs 31 and the slots 30 are concave-convex matched and assembled, the structure is simple, and the dismounting is convenient.

[0038] Specifically, the dismounting block 29 is made of plastic, so that the opening and closing cover movable cavity 8 can be elastically deformed, which can ensure the movement of the rotating shaft 3 between the covering clamping hole 9, the through slot 10 and the opening clamping hole 11, and can also ensure that the rotating shaft 3 is clamped in the covering clamping hole 9 or the opening clamping hole 11.

[0039] All the technical features in the embodiment can be freely combined according to actual needs.

[0040] The above embodiment is a preferred implementation scheme of the utility model, and the utility model can also be implemented in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the utility model.

Claims

1. An air-tight powder cartridge, characterized by: The utility model provides a box, including bottom box (1), box cover (2), pivot (3), inner cover (4) and inner box (5), inner box (5) is embedded in the center position of bottom box (1), inner cover (4) is arranged in the inner wall center position of box cover (2), and inner cover (4) is used to cover inner box (5), and one side of bottom box (1) is provided with rotary groove (6), and one side bottom surface of box cover (2) is provided with adapter block (7), and the middle part of adapter block (7) is provided with open and close cover movable cavity (8), pivot (3) is installed in bottom box (1) and penetrates rotary groove (6), pivot (3) penetrates open and close cover movable cavity (8), and open and close cover movable cavity (8) includes cover and closes clamping hole (9), through slot (10) and open and close clamping hole (11) that communicate in sequence, and pivot (3) can be connected with cover and closes clamping hole (9) or open and close clamping hole (11), and the inner diameter of cover and closes clamping hole (9) is equal to the inner diameter of open and close clamping hole (11), and the diameter of pivot (3) is not greater than the inner diameter of cover and closes clamping hole (9), and the slot width of through slot (10) is less than the diameter of pivot (3), and adapter block (7) is movably arranged in rotary groove (6);When pivot (3) is connected in cover and closes clamping hole (9), inner cover (4) covers inner box (5), and box cover (2) covers bottom box (1), and the cover surface of box cover (2) is closely combined with the top end surface of bottom box (1).

2. An air-tight powder cartridge according to claim 1, characterized in that: The outer side wall of inner cover (4) and the inner side wall of box cover (2) surround to form outer circular ring groove (12), and adapter block (7) is integrally connected with outer circular ring (13), and outer circular ring (13) is contained in outer circular ring groove (12), and outer circular ring (13) is rotatably connected with box cover (2).

3. An air-tight powder cartridge according to claim 2, wherein: The inner side wall of inner cover (4) is provided with inner rotating structure, and the outer side wall of inner box (5) is provided with outer rotating structure, and the inner rotating structure is used for the screwing of the outer rotating structure.

4. A hermetic powder box according to claim 3, characterized in that: The inner rotating structure includes at least two inner rotating blocks (14) arranged in an annular array on the inner side wall of the inner cover (4), and the outer rotating structure includes at least two outer rotating blocks (15) arranged in an annular array on the outer side wall of the inner box (5), and one inner rotating block (14) is screwed with one outer rotating block (15).

5. A hermetically sealed powder cartridge according to claim 4, wherein: The bottom surface of the outer rotating block (15) is provided with an inclined downward rotating guide surface (16), the bottom end of the rotating guide surface (16) is protrudingly provided with a blocking block (17), and the blocking block (17) is used for blocking the inner rotating block (14); two adjacent outer rotating blocks (15) form a cover space for the inner rotating block (14) to pass through, and the inner rotating block (14) rotates between the blocking blocks (17) of the two adjacent outer rotating blocks (15).

6. A hermetic powder box according to claim 5, characterized in that: The middle part of the inner rotating block (14) is recessed with a clamping groove (18), and the outer side wall of the inner box (5) is provided with a clamping protrusion (19), the clamping protrusion (19) is located below the rotating guide surface (16), the clamping protrusion (19) is spaced apart from the corresponding blocking block (17), and the clamping groove (18) is used for clamping the clamping protrusion (19).

7. The air-tight powder cartridge of claim 2, wherein: The inner part of the box cover (2) is provided with an inner circular groove (20) and a rotating groove (21) communicated with the inner circular groove (20) and the outer circular groove (12), the inner circular groove (20) is coaxial and equal in diameter with the outer circular groove (12), the inner circular groove (20) is provided with an inner circular ring (22) inside, the top of the outer circular ring (13) is provided with a connecting piece (23), the connecting piece (23) is connected with the inner circular ring (22) after penetrating through the rotating groove (21), and the connecting piece (23) can rotate along the rotating groove (21).

8. A hermetic powder box according to claim 7, characterized in that: The box cover (2) comprises a cover body (24) and a cover plate (25), the top surface of the cover body (24) is concavely provided with a containing cavity (26), the inner circular groove (20) is concavely provided from the bottom wall of the containing cavity (26), and the cover plate (25) is embedded in the containing cavity (26), and the cover plate (25) encapsulates the inner circular ring (22) in the inner circular groove (20).

9. The air-tight powder cartridge of claim 1, wherein: The inner top surface of the inner cover (4) is attached with a sealing gasket (27), and the sealing gasket (27) is used for sealing the top port of the inner box (5).

10. The air-tight powder cartridge of claim 1, wherein: The adapter block (7) is provided with a mounting hole (28), the mounting hole (28) is detachably provided with a dismounting block (29), and the opening and closing cover movable cavity (8) is formed in the dismounting block (29).

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