A multi-sided gate

Abstract

The present invention belongs to the technical field of household goods, and discloses a multi-sided gate fence, which includes a plurality of gate fence units connected end to end in sequence, wherein the plurality of gate fence units are arranged to form a polygonal space, and two adjacent gate fence units are connected by a rotating connection assembly, wherein the rotating connection assembly includes two connecting blocks, wherein the two connecting blocks are respectively connected to two adjacent gate fence units, and the rotating connection assembly also includes a shaft sleeve and a clamping column, wherein the clamping column is located in the shaft sleeve and is connected to the shaft sleeve in a manner that it can be raised and lowered, wherein a rotating shaft is arranged on the connecting block, wherein the rotating shafts on the two connecting blocks are both rotatably connected to the same shaft sleeve, wherein a gear is arranged on the rotating shaft, wherein the clamping column is located between the two rotating shafts, wherein a tooth groove that can cooperate with the gear is arranged on the clamping column, and wherein the clamping column can mesh with or disengage from the gear when it is raised and lowered along the shaft sleeve. The multi-sided gate fence provided by the present invention has the advantages of stable structure and convenient adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of household articles, and in particular to a multi-sided door fence. Background Art

[0002] Fences are used to demarcate specific areas indoors or outdoors, providing safe places for children or pets to play, so as to prevent a series of accidents caused by children or pets climbing around. In addition, most existing fences are quadrilaterals or polygonal structures with more than four sides. Most fences also have the property of being foldable for easy storage, but such multi-sided gates are not stable and are prone to change in shape under the action of external forces, thereby causing changes in the internal space of the fence, and in severe cases, causing harm to children or pets in the fence.

[0003] In the prior art, there is a threshold-free safety fence with patent number CN201820761154.6. Although the utility model adopts a corresponding connection mechanism to provide the fence with rotation capability, the connection mechanism described in the utility model is mostly connected together by threaded connection, which does not solve the instability problem of the polygonal fence. In addition, there is also the problem that the corresponding threaded rotating block is screwed out during the rotation of the guardrail, which leads to the failure of the entire fence structure. Summary of the invention

[0004] The object of the present invention is to provide a multi-sided door barrier which has the advantages of stable structure and convenient adjustment.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A multi-sided gate fence comprises a plurality of gate fence units connected end to end in sequence, wherein the plurality of gate fence units are arranged to form a polygonal space, and two adjacent gate fence units are connected via a rotating connection assembly, wherein the rotating connection assembly comprises two rotating blocks, and the two rotating blocks are respectively connected to two adjacent gate fence units, and the rotating connection assembly also comprises a shaft sleeve and a clamping column, wherein the clamping column is located in the shaft sleeve and is connected to the shaft sleeve in a liftable manner, and a rotating shaft is arranged on the rotating block, and the rotating shafts on the two rotating blocks are both rotatably connected to the same shaft sleeve, and a gear is arranged on the rotating shaft, and the clamping column is located between the two rotating shafts, and a tooth groove that can cooperate with the gear is arranged on the clamping column, and the clamping column can engage with or disengage from the gear when it is lifted and lowered along the shaft sleeve.

[0007] Preferably, the sleeve includes a shell and a base, the interior of the shell is hollow and the bottom end face is open, the base is located at the bottom end face of the shell and is detachably connected to the shell, and the rotating shaft extends into the shell from the bottom end face of the shell and is rotatably connected to the shell.

[0008] Preferably, the two rotating shafts are respectively located on both sides of the base, and the two sides of the base are provided with semicircular areas adapted to the shape of the rotating shafts. The sleeve also includes two patch blocks, which are arranged opposite to the semicircular areas of the base and form a circular area for the rotating shaft to penetrate.

[0009] Preferably, the rotating connection assembly further comprises an elastic member, one end of which abuts against the base, and the other end of which abuts against the clamping column.

[0010] Preferably, a bump is convexly provided on the base, and the elastic member is a spring, and the spring is sleeved outside the bump.

[0011] Preferably, a convex strip is vertically provided on the inner side of the shell, and a notch matching the convex strip is vertically provided on the side of the clamping column.

[0012] Preferably, the rotating connection assembly also includes a pressing piece, which is rotatably connected to the top of the clamping column, and the top surface of the shell is provided with a through hole for the pressing piece to extend out, and the inner side surface of the shell is provided with a stop portion, and the stop portion is arranged close to the outer edge of the through hole, and the outer periphery of the bottom end of the pressing piece is provided with an abutment portion, and after the pressing piece is pressed down and rotated a certain angle relative to the clamping column, the abutment portion can abut against the stop portion to limit the rise of the pressing piece.

[0013] Preferably, one of the two surfaces of the abutting portion and the stopping portion that contact each other is provided with a protrusion, and the other is provided with a recess that cooperates with the protrusion.

[0014] Preferably, a hexagonal hole for matching with a hexagonal wrench is formed on the top of the pressing member.

[0015] Preferably, at least one of the door fence units is an entry and exit door fence, the entry and exit door fence comprises a frame and a door, one side of the door is hinged to the frame, and a locking device is connected between the other side of the door and the frame, the locking device comprises a handle box and a receiving box, the handle box comprises a box body, a horizontal push twist connected to the box body, a lock tongue piece and a lock hook, the box body is connected to the door, the horizontal push twist is slidably connected to the box body, the lock tongue piece is slidably connected to the box body and connected to the horizontal push twist, the horizontal push twist can drive the lock tongue piece to extend out or extend into the box body, the lock hook is slidably connected to the box body, the receiving box is connected to the frame, and a lock tongue hole and a lock hook hole are provided on the receiving box, the lock tongue hole is used to cooperate with the lock tongue piece, and the lock hook hole is used to cooperate with the lock hook, the inner top surface of the lock hook hole is an inclined surface, and when the door is lifted, the lock hook can slide out along the inclined surface of the lock hook hole.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a multi-party gate barrier, when the clamping column is in a state of meshing with the gear, since the clamping column only has a lifting movement and does not rotate, the rotating shaft will not rotate when the gear is meshing with the clamping column, that is, no rotation occurs between the two rotating blocks, that is, no rotation occurs between the two adjacent gate barrier units. The multi-party gate barrier is not easy to deform after being placed, and the structure is stable; when it is necessary to adjust the angle between two adjacent gate barrier units, it is only necessary to press down the clamping column to disengage the clamping column from the gear, and the two rotating shafts can rotate freely, so the angle between the two gate barrier units can be easily adjusted, and after adjustment, the clamping column can be reset to achieve the locking of the angle between the two gate barrier units, the adjustment process is convenient, and the adjustment range is between 0° and 360°, with a large adjustment range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the enclosure state of multiple gates provided in a specific implementation manner;

[0018] Figure 2 It is a schematic diagram of the structure of the multi-party gate in the folded state provided in a specific implementation manner;

[0019] Figure 3 is a structural schematic diagram of a rotating connection assembly provided in a specific embodiment;

[0020] Figure 4 is a schematic diagram of the structure of the rotary connection assembly provided in the specific embodiment after the housing is removed in the unlocked state;

[0021] Figure 5 is a schematic diagram of the structure of the rotary connection assembly provided in the specific embodiment after the housing is removed in the locked state;

[0022] Figure 6 It is a structural schematic diagram of a clamping column provided in a specific implementation manner;

[0023] Figure 7 is a structural schematic diagram of a pressing member provided in a specific implementation manner;

[0024] Figure 8 is a structural schematic diagram of a housing provided in a specific embodiment;

[0025] Fig. 9 is a cross-sectional view of an access door barrier provided in a specific embodiment;

[0026] Fig.10 yes Fig. 9 A partial enlarged view of point A in the middle.

[0027] In the figure: 1, gate unit; 2, rotating connection assembly; 21, rotating block; 22, sleeve; 221, housing; 2211, convex strip; 2212, through hole; 222, base; 223, patch; 224, convex block; 225, stopper; 2251, pit; 23, clamping column; 231, tooth groove; 232, notch; 24, rotating shaft; 241, gear; 25, spring; 26, Pressing member; 261, abutting portion; 2611, protrusion; 2612, hexagonal hole; 3, frame; 4, door; 51, handle box; 511, box body; 512, horizontal push and turn; 513, lock tongue member; 514, lock hook; 515, first spring; 516, second spring; 517, linkage member; 518, third spring; 52, receiving box; 521, lock tongue hole; 522, lock hook hole. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0029] like Figure 1-Figure 10 As shown, the present invention provides a multi-sided gate, which includes a plurality of gate units 1 connected end to end, and the plurality of gate units 1 are arranged to form a polygonal space (refer to Figure 1 In the state shown, two adjacent gate fence units 1 are connected by a rotating connection component 2. The two ends of the rotating connection component 2 are detachably connected to the two adjacent gate fence units 1, and the angle between the two adjacent gate fence units 1 can be adjusted. When the multi-party gate fence needs to be stored, only one of the rotating connection components 2 needs to be removed from the gate fence unit 1 connected thereto, and then the angle between the gate fence units 1 is adjusted under the action of the rotating connection component 2, and finally the multi-party gate fence is folded (refer to Figure 2 The multi-door fence can be easily stored.

[0030] like Figure 3-Figure 5 As shown, the rotating connection component 2 includes two rotating blocks 21, and the two rotating blocks 21 are respectively connected to two adjacent door fence units 1. The rotating connection component 2 also includes a sleeve 22 and a clamping column 23. The clamping column 23 is located in the sleeve 22 and is connected to the sleeve 22 in a liftable manner. A rotating shaft 24 is provided on the rotating block 21. The rotating shafts 24 on the two rotating blocks 21 are both rotatably connected to the same sleeve 22. A gear 241 is provided on the rotating shaft 24. The clamping column 23 is located between the two rotating shafts 24. A tooth groove 231 that can cooperate with the gear 241 is provided on the clamping column 23. The clamping column 23 can engage or disengage with the gear 241 when it is lifted and lowered along the sleeve 22.

[0031] When the clamping column 23 is in meshing state with the gear 241 (refer to Figure 5As shown in the state, since the clamping column 23 has only lifting movement and does not rotate, the rotating shaft 24 does not rotate when the gear 241 is engaged with the clamping column 23, that is, the two rotating blocks 21 do not rotate, that is, the two adjacent gate units 1 do not rotate, and the multi-party gate is not easy to deform after being placed, and the structure is stable; when the angle between the two adjacent gate units 1 needs to be adjusted, the clamping column 23 can be disengaged from the gear 241 by simply pressing down the clamping column 23 (refer to Figure 4 As shown in the state, the two rotating shafts 24 can rotate freely, so the angle between the two door fence units 1 can be easily adjusted. After adjustment, the clamping column 23 can be reset to achieve the locking of the angle between the two door fence units 1. The adjustment process is convenient, the adjustment range is between 0° and 360°, and the adjustment range is large.

[0032] like Figure 3-Figure 5 , Figure 8 As shown, the sleeve 22 includes a shell 221 and a base 222. The interior of the shell 221 is hollow and the bottom end face is open. The base 222 is located at the bottom end face of the shell 221 and is detachably connected to the shell 221. The rotating shaft 24 extends from the bottom end face of the shell 221 into the shell 221 and is rotatably connected to the shell 221. The shell 221 and the base 222 are designed to be separate and detachably connected, which can be easily installed. The two rotating shafts 24 are respectively located on both sides of the base 222. The two sides of the base 222 are provided with semicircular areas that are compatible with the shape of the rotating shaft 24. The sleeve 22 also includes two patch blocks 223. The patch blocks 223 are arranged opposite to the semicircular areas of the base 222 and form a circular area for the rotating shaft 24 to penetrate. The patch block 223 and the base 222 are designed to be separated and located on both sides of the rotating shaft 24 respectively. They are separated for easy installation. The rotating shaft 24 is limited by the circular area formed between the patch block 223 and the base 222 to fill the matching gap between the rotating shaft 24 and the sleeve 22 to prevent the rotating shaft 24 from loosening.

[0033] In this embodiment, the descent of the column 23 is achieved by pressing the column 23. To facilitate the rise of the column 23, the rotating connection assembly 2 also includes an elastic member, one end of which is abutted against the base 222, and the other end is abutted against the column 23. When the column 23 is pressed to make the column 23 descend, the elastic member is compressed. When the column 23 is disengaged from the meshing state between the rotating shaft 24, the column 23 is kept pressed continuously, and the angle between two adjacent gate units 1 can be adjusted. When it is adjusted to a suitable angle, only the pressure on the column 23 needs to be released, and the column 23 rises under the action of the restoring force of the elastic member and returns to the original position. By setting the elastic member, the lifting and lowering movement of the column 23 can be conveniently achieved. To facilitate the installation of the elastic member, a protrusion 224 can be convexly provided on the base 222, and the elastic member can be a spring 25, which is sleeved outside the protrusion 224. The height of the protrusion 224 should be less than the height of the spring 25 in the natural state, and does not affect the compression process of the spring 25.

[0034] To ensure that the movement of the column 23 is only the lifting movement in the up-and-down direction and does not rotate during the movement, a convex strip 2211 is vertically provided on the inner side of the shell 221, and a notch 232 that matches the convex strip 2211 is vertically provided on the side of the column 23. The notch 232 on the side of the column 23 is slidably connected with the convex strip 2211 on the inner side of the shell 221. When the column 23 is lifted or lowered, the convex strip 2211 can limit the movement direction of the column 23 to be maintained along the extension direction of the convex strip 2211 and will not rotate. To more effectively limit the column 23 and prevent the column 23 from shaking in the shell 221, two convex strips 2211 can be provided, and they are respectively located on opposite sides of the shell 221. A notch 232 is provided on each side of the column 23. The two notches 232 and the two convex strips 2211 are matched one by one, thereby more effectively limiting the position of the column 23 and limiting the movement direction.

[0035] like Figure 6-Figure 8As shown, the rotating connection assembly 2 also includes a pressing piece 26, which is rotatably connected to the top of the clamping column 23. The top surface of the shell 221 is provided with a through hole 2212 for the pressing piece 26 to extend out. The inner side surface of the shell 221 is provided with a stopper 225, and the stopper 225 is arranged close to the outer edge of the through hole 2212. The outer periphery of the bottom end of the pressing piece 26 is provided with an abutment portion 261. After the pressing piece 26 is pressed down and rotated a certain angle relative to the clamping column 23, the abutment portion 261 can abut against the stopper 225 to limit the pressing piece 26 from rising. A circular hole for plugging with the card column 23 is provided at the bottom of the pressing piece 26. The pressing piece 26 can rotate relative to the card column 23. The top of the pressing piece 26 extends out of the shell 221. When adjusting the angle between two adjacent door fence units 1, pressure can be applied to the pressing piece 26 to drive the card column 23 to descend, so that the card column 23 and the gear 241 are out of meshing state, thereby adjusting the angle between the two door fence units 1. Normally, it is only necessary to maintain the pressure on the pressing member 26, adjust the angle between the two gate units 1 to a suitable position, and then release the pressure on the pressing member 26. However, this method requires that the pressing member 26 be kept under pressure all the time, which is more convenient for short-term adjustments. When the column 23 and the gear 241 need to be kept disengaged for a long time, it is only necessary to press the pressing member 26 down and then rotate it by a certain angle so that the abutting portion 261 of the pressing member 26 abuts against the stopper 225. At this time, the rotating connecting assembly 2 is in an unlocked state. After releasing the pressure on the pressing member 26, the stopper 225 can limit the rise of the pressing member 26, so that the column 23 is always kept in the lowered position and will not mesh with the gear 241. As a result, the angle between the gate units 1 can be freely adjusted for a long time, and the gate can be adjusted to any shape, such as Figure 2 As shown, it can be folded up for easy packaging into a box for transportation, and can be used as soon as it is taken out by the user.

[0036] When the abutting state of the abutting portion 261 and the stopper 225 needs to be maintained, in order to prevent the pressing member 26 from rotating, one of the two surfaces of the abutting portion 261 and the stopper 225 that contact each other is provided with a protrusion 2611, and the other is provided with a recess 2251 that matches the protrusion 2611. Therefore, when the pressing member 26 rotates to a position where the protrusion 2611 and the recess 2251 are opposite, the protrusion 2611 and the recess 2251 can match each other, thereby limiting the rotation of the pressing member 26 caused by minor external conditions such as shaking.

[0037] Since the pressing member 26 will enter the interior of the housing 221 when pressed, a hexagonal hole 2612 for matching with a hexagonal wrench is provided on the top of the pressing member 26 to facilitate the rotation of the pressing member 26. When the pressing member 26 needs to be rotated, the pressing member 26 can be conveniently rotated to a certain angle while pressing the pressing member 26 by using a matching hexagonal wrench.

[0038] In this embodiment, Fig. 9 and Fig.10 As shown, at least one of the door fence units 1 is an entry and exit door fence, which includes a frame 3 and a door 4. One side of the door 4 is hinged to the frame 3, and a locking device is connected between the other side of the door 4 and the frame 3. The locking device includes a handle box 51 and a receiving box 52. The handle box 51 includes a box body 511, a horizontal push-twist 512 connected to the box body 511, a lock tongue piece 513 and a lock hook 514. The box body 511 is connected to the door 4, the horizontal push-twist 512 is slidably connected to the box body 511, and the lock tongue piece 513 is slidably connected to the box body 511. 11 and connected with the horizontal push knob 512, the horizontal push knob 512 can drive the bolt member 513 to extend out or extend into the box body 511, the lock hook 514 is slidably connected in the box body 511, the receiving box 52 is connected to the frame 3, and the receiving box 52 is provided with a bolt hole 521 and a lock hook hole 522, the bolt hole 521 is used to cooperate with the bolt member 513, the lock hook hole 522 is used to cooperate with the lock hook 514, the inner top surface of the lock hook hole 522 is an inclined surface, when the door 4 is lifted, the lock hook 514 can slide out along the inclined surface of the lock hook hole 522. When opening the door, the horizontal push knob 512 is turned, and the horizontal push knob 512 can drive the bolt member 513 to disengage from the bolt hole 521, thereby unlocking the door 4 and the frame 3. At the same time, through the cooperation of the lock hook hole 522 and the lock hook 514, the door 4 can be restricted from being pulled open from the front-to-back direction. When opening the door, the door 4 can only be lifted up a short distance on this side so that the lock hook 514 is disengaged from the lock hook hole 522 before it can be opened from the front-to-back direction. This can provide multiple protections, prevent young children from accidentally opening the door, and ensure safety during use.

[0039] The handle box 51 also includes a linkage member 517, a first spring 515, a second spring 516 and a third spring 518. The linkage member 517 is slidably connected in the box body 511 and is connected to the horizontal push-twist 512. One end of the first spring 515 abuts against the linkage member 517, and the other end abuts against the box body 511. The first spring 515 is used to drive the linkage member 517 to reset; the lock tongue member 513 is connected to the linkage member 517, one end of the second spring 516 is connected to the lock tongue member 513, and the other end abuts against the box body 511, and the second spring 516 is used to drive the lock tongue member 513 to reset; one end of the third spring 518 is connected to the lock hook 514, and the other end abuts against the box body 511, and the third spring 518 is used to drive the lock hook 514 to reset. When opening the door, after the horizontal push knob 512 is turned, the horizontal push knob 512 drives the linkage member 517 to move in a direction away from the receiving box 52, and the linkage member 517 can drive the lock tongue member 513 to move, so that the lock tongue member 513 is separated from the lock tongue hole 521; after opening the door, the horizontal push knob 512 is released, and the linkage member 517 can be reset under the action of the first spring 515, and at the same time drive the horizontal push knob 512 to reset, and the lock tongue member 513 is reset under the action of the second spring 516; when closing the door, it is only necessary to turn the horizontal push knob 512 first, and when the handle box 51 is opposite to the receiving box 52, release the horizontal push knob 512, and the lock tongue member 513 will extend into the lock tongue hole 521 under the action of the second spring 516, thereby locking the door and the frame 3.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A multi-sided gate, characterized in that: The invention comprises a plurality of gate units (1) connected end to end in sequence, wherein the plurality of gate units (1) are arranged to form a polygonal space, and two adjacent gate units (1) are connected via a rotating connection assembly (2), wherein the rotating connection assembly (2) comprises two rotating blocks (21), wherein the two rotating blocks (21) are respectively connected to two adjacent gate units (1), and wherein the rotating connection assembly (2) further comprises a shaft sleeve (22) and a clamping column (23), wherein the clamping column (23) is located in the shaft sleeve (22) and is connected to the shaft sleeve in a liftable manner. (22), a rotating shaft (24) is provided on the rotating block (21), the rotating shafts (24) on the two rotating blocks (21) are both rotatably connected to the same shaft sleeve (22), a gear (241) is provided on the rotating shaft (24), the clamping column (23) is located between the two rotating shafts (24), a tooth groove (231) capable of cooperating with the gear (241) is provided on the clamping column (23), and the clamping column (23) can mesh with or disengage from the gear (241) when it is lifted or lowered along the shaft sleeve (22); The shaft sleeve (22) comprises a shell (221) and a base (222); the shell (221) is hollow inside and has an open bottom end surface; the base (222) is located at the bottom end surface of the shell (221) and is detachably connected to the shell (221); the rotating shaft (24) extends from the bottom end surface of the shell (221) into the shell (221) and is rotatably connected to the shell (221); The two rotating shafts (24) are respectively located on two sides of the base (222); the two sides of the base (222) are provided with semicircular sections that match the outer shape of the rotating shafts (24); the sleeve (22) further comprises two patch blocks (223); the patch blocks (223) are arranged opposite to the semicircular sections of the base (222) and form a circular section for the rotating shaft (24) to penetrate; The rotating connection assembly (2) further comprises an elastic member, one end of which abuts against the base (222) and the other end of which abuts against the clamping column (23).

2. The multi-sided gate according to claim 1, characterized in that: A protrusion (224) is convexly provided on the base (222), and the elastic member is a spring (25), and the spring (25) is sleeved outside the protrusion (224).

3. The multi-sided gate according to claim 1, characterized in that: A convex strip (2211) is vertically provided on the inner side of the shell (221), and a notch (232) matching the convex strip (2211) is vertically provided on the side of the clamping column (23).

4. The multi-sided gate according to claim 1, characterized in that: The rotating connection assembly (2) further comprises a pressing member (26), wherein the pressing member (26) is rotatably connected to the top of the clamping column (23); a through hole (2212) for the pressing member (26) to extend out is provided on the top surface of the shell (221); a stopper (225) is provided on the inner side surface of the shell (221); the stopper (225) is arranged close to the outer edge of the through hole (2212); an abutment (261) is provided on the outer periphery of the bottom end of the pressing member (26); after the pressing member (26) is pressed downward and rotated by a certain angle relative to the clamping column (23), the abutment (261) can abut against the stopper (225) to limit the lifting of the pressing member (26).

5. The multi-sided gate according to claim 4, characterized in that: Of the two surfaces of the abutment portion (261) and the stop portion (225) that contact each other, one is provided with a protrusion (2611), and the other is provided with a recess (2251) that matches the protrusion (2611).

6. The multi-sided gate according to claim 4, characterized in that: The top of the pressing piece (26) is provided with a hexagonal hole (2612) for matching with a hexagonal wrench.

7. The multi-sided gate according to any one of claims 1 to 6, characterized in that: At least one of the door fence units (1) is an entry / exit door fence, the entry / exit door fence comprising a frame (3) and a door (4), one side of the door (4) being hinged to the frame (3), the other side of the door (4) being connected to the frame (3) with a locking device, the locking device comprising a handle box (51) and a receiving box (52), the handle box (51) comprising a box body (511), a horizontal push-twist (512) connected to the box body (511), a locking tongue (513) and a locking hook (514), the box body (511) being connected to the door (4), the horizontal push-twist (512) being slidably connected to the box body (511), the locking tongue (513) being slidably connected to the box body (511), and the locking tongue (513) being slidably connected to the box body (511). ) and is connected to the horizontal push-twist (512), the horizontal push-twist (512) can drive the locking tongue member (513) to extend out or extend into the box body (511), the locking hook (514) is slidably connected to the box body (511), the receiving box (52) is connected to the frame (3), and the receiving box (52) is provided with a locking tongue hole (521) and a locking hook hole (522), the locking tongue hole (521) is used to cooperate with the locking tongue member (513), and the locking hook hole (522) is used to cooperate with the locking hook (514), the inner top surface of the locking hook hole (522) is an inclined surface, and when the door (4) is lifted, the locking hook (514) can slide out along the inclined surface of the locking hook hole (522).

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