Sample feeding box of sampling injector

Abstract

The sample feeding box comprises a box body and a placement platform, the box body comprises a box main body, a box door, rollers and a pull rod, a containing cavity is formed in the box main body, an opening communicated with the containing cavity is formed in the side portion of the box main body, the box door is movably connected to the box main body and used for covering or exposing the opening, and the pull rod is installed on the box main body; the rollers are arranged at the bottom of the box body; the containing cavity is internally provided with an opening, the multiple containing platforms are arranged in the containing cavity at intervals in the vertical direction of the box body, each containing platform is movably connected to the box body in the first horizontal direction so that the containing platform can be pushed into or pulled out of the containing cavity through the opening, each containing platform is provided with multiple containing grooves with upward openings, and the containing grooves are used for containing and fixing sampling syringes; a plurality of label grooves in one-to-one correspondence with the plurality of placing grooves are further formed in each placing platform, and sample labels can be inserted into the label grooves. Therefore, the technical problems of collision and breakage of the sampling injector and confusion of samples in the sampling injector are solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of sampling equipment, and in particular to a sampling syringe sample delivery box. Background Art

[0002] The transformer oil in the transformer is easily contaminated during the operation of the transformer. The water content, gas content and distribution of particulate impurities in the transformer oil will affect the insulation performance of the transformer. Therefore, it is necessary to sample the transformer oil regularly.

[0003] There are usually multiple transformers at the production site of an electric power company. The current sampling method is to first attach a label to the syringe, then sample the transformer corresponding to the label. The syringe after sampling is placed in a tray. After sampling, the sampling personnel will carry the sample to the laboratory on a flat tray for chromatography analysis and other inspections.

[0004] However, since the syringe is made of glass and is placed directly on the tray, it is easy to collide and break when the sampler moves. In addition, during the sampling process, the transformer oil easily soaks the label and causes the label to fall off, which in turn causes the sample in the syringe to be mixed up. Utility Model Content

[0005] The purpose of the present disclosure is to provide a sampling syringe sample delivery box, which can solve the related technical problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present disclosure provides a sampling syringe sample delivery box, including a box body and a placement platform, the box body including a box body, a box door, a roller and a pull rod, the box body has a accommodating cavity inside, the side of the box body has an opening connected to the accommodating cavity, the box door is movably connected to the box body and is used to cover or expose the opening, the pull rod is installed on the box body, and the roller is arranged at the bottom of the box body; the placement platforms are multiple, and the multiple placement platforms are arranged in the accommodating cavity at intervals along the vertical direction of the box body, each of the placement platforms is movably connected to the box body along a first horizontal direction so that it can be pushed into or pulled out of the accommodating cavity through the opening, each of the placement platforms has a plurality of placement slots with openings facing upwards, the placement slots are used to accommodate and fix sampling syringes, and each of the placement platforms also has a plurality of label slots arranged in a one-to-one correspondence with the plurality of placement slots, and the label slots are used for inserting sample labels.

[0007] Optionally, the placement platform includes a placement frame and a flexible buffer pad, the placement frame is movably connected to the box body along the first horizontal direction, and the flexible buffer pad is installed on the placement frame.

[0008] Optionally, the placement frame includes an annular frame and a support plate, the annular frame is movably connected to the box body along the first horizontal direction, a support flange protruding toward the inner side of the annular frame is formed at the bottom of the annular frame, the support plate is located on the inner side of the annular frame and is detachably placed on the support flange, and the flexible buffer pad is fixed on the support plate; wherein, the label slot is formed on the upper surface of the support plate, and the flexible buffer pad exposes the label slot; or, the label slot is formed on the upper surface of the flexible buffer pad.

[0009] Optionally, the two ends of the placement slot are respectively a head end and a tail end, the head end is used to accommodate and fix the head of the sampling syringe, and the tail end is used to accommodate and fix the tail of the sampling syringe, and in the arrangement direction of the multiple placement slots, the head end of one placement slot in every two adjacent placement slots is adjacent to the tail end of the other placement slot.

[0010] Optionally, a plurality of placement grooves are arranged at intervals along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

[0011] Optionally, opposite ends of the placement platform are movably connected to opposite cavity walls of the accommodating cavity via slide rails, and the sliding direction of the slide rails is a first horizontal direction.

[0012] Optionally, the slide rail is a damping slide rail.

[0013] Optionally, a magnetic adsorption component is provided on a side of the placement platform away from the opening, and the magnetic adsorption component can be magnetically connected to a cavity wall of the accommodating cavity.

[0014] Optionally, the magnetic adsorption component is a soft magnetic strip.

[0015] Optionally, the upper end of the box door is hinged above the opening of the box body and the lower end of the box door can be flipped to overlap the top of the box body, and the lower end of the box door can be unlockably locked to the box body by a locking structure to cover the opening.

[0016] Through the above technical solution, by pulling the pull rod and cooperating with the roller at the bottom of the box body, the entire sampling syringe sample delivery box can be easily moved to the vicinity of the transformer to be sampled, opening the box door to expose the opening and pushing the placement platform out of the accommodating cavity from the opening, so that the sampling personnel can conveniently take out the empty sampling syringe from the placement slot on the placement platform to sample the transformer oil, and the sampling syringe after sampling is placed back to the placement slot where it is located to prevent the sampling syringe from being damaged by collision during the transportation process before and after sampling. In addition, each placement slot has a corresponding label slot, and placing the label in the label slot can make the label in the label slot correspond to the sampling syringe in the placement slot one by one, and at the same time, the label can be separated from the sampling syringe, thus avoiding the situation that the label attached to the sampling syringe falls off due to the oil on the surface of the sampling syringe. After the sampling is completed, the placement platform is pushed into the accommodating cavity and the opening is covered by the box door. The sampling personnel can move the sampling syringe sample delivery box to the next transformer by pulling the pull rod to continue sampling or send the sample to the laboratory for testing.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of a sampling syringe sample delivery box provided by an exemplary embodiment of the present disclosure when the box door is opened;

[0020] Figure 2 is a schematic diagram of a three-dimensional structure of a placement platform provided by an exemplary embodiment of the present disclosure;

[0021] Figure 3 is a schematic diagram of a three-dimensional structure of a placement frame provided by an exemplary embodiment of the present disclosure;

[0022] Figure 4 is a schematic diagram of a three-dimensional structure of a flexible buffer pad provided by an exemplary embodiment of the present disclosure;

[0023] Figure 5 is a schematic diagram of a three-dimensional structure of a placement platform provided by an exemplary embodiment of the present disclosure (with Figure 2 different perspectives).

[0024] Description of Reference Numerals

[0025] 10-box; 20-sampling syringe;

[0026] 100-box body; 110-accommodating chamber;

[0027] 200-Box door;

[0028] 300-roller; 310-support block;

[0029] 400-tie rod;

[0030] 500-placing platform; 510-placing frame; 511-annular frame; 5111-supporting flange; 5112-through hole; 512-supporting plate; 520-flexible buffer pad; 521-placing groove; 5211-head end; 5212-tail end; 522-label groove;

[0031] 600-slide rail;

[0032] 700-Magnetic adsorption parts. DETAILED DESCRIPTION

[0033] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0034] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is defined based on the normal use state of the sampling syringe sample delivery box, and is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore cannot be understood as a limitation of the present disclosure. In addition, the terms "inside and outside" refer to the inside and outside of the corresponding structural contour. In addition, the terms "first", "second", etc. are only used to distinguish one element from another, and do not have order and importance.

[0035] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0036] The present invention provides a sampling syringe sample delivery box to solve the technical problems that the existing sampling syringes are easily damaged by collision and the labels are easily dropped during the sample delivery process.

[0037] like Figures 1 to 5As shown, the sampling syringe sample delivery box includes a box body 10 and a placement platform 500. The box body 10 includes a box body 100, a box door 200, a roller 300 and a pull rod 400. The box body 100 has an accommodating chamber 110 inside, and the side of the box body 100 has an opening connected to the accommodating chamber 110. The box door 200 is movably connected to the box body 100 and is used to cover or expose the opening. The pull rod 400 is installed on the box body 100, and the roller 300 is arranged at the bottom of the box body 100; there are multiple placement platforms 500, and the multiple placement platforms 500 are arranged. 00 are arranged in the accommodating cavity 110 at intervals along the vertical direction of the box body 100, and each placement platform 500 is movably connected to the box body 100 along the first horizontal direction so as to be able to be pushed into or pulled out of the accommodating cavity 110 through the opening. Each placement platform 500 has a plurality of placement grooves 521 with openings facing upward, and the placement grooves 521 are used to accommodate and fix the sampling syringe 20. Each placement platform 500 also has a plurality of label grooves 522 arranged in a one-to-one correspondence with the plurality of placement grooves 521, and the label grooves 522 are used for inserting sample labels.

[0038] Through the above technical solution, by pulling the pull rod 400 and cooperating with the roller 300 at the bottom of the box body 100, the entire sampling syringe sample delivery box can be easily moved to the vicinity of the transformer to be sampled, the box door 200 is opened to expose the opening and the placement platform 500 is pushed out of the accommodating chamber 110 from the opening, so that the sampling personnel can conveniently take out the empty sampling syringe 20 from the placement slot 521 on the placement platform 500 to sample the transformer oil, and the sampling syringe 20 after sampling is placed back to the placement slot 521 where it is located to be fixed, so as to prevent the sampling syringe 20 from being damaged by collision during the transportation process before and after sampling. In addition, each placement slot 521 has a corresponding label slot 522, and placing the label in the label slot 522 can make the label in the label slot 522 correspond to the sampling syringe 20 in the placement slot 521 one by one, and at the same time, the label can be separated from the sampling syringe 20, so as to avoid the situation that the label attached to the sampling syringe 20 falls off due to the surface of the sampling syringe 20 being stained with oil. After sampling is completed, the placement platform 500 is pushed into the accommodating chamber 110 and the opening is covered by the box door 200. The sampling personnel can move the sampling syringe sample delivery box to the next transformer by pulling the pull rod 400 to continue sampling or send the sample to the laboratory for testing.

[0039] It should be noted that the pull rod 400 can be a fixed pull rod 400 or a telescopic pull rod 400. When the telescopic pull rod 400 is used, it can be adapted to sampling personnel of different heights. The roller 300 can be an ordinary roller 300 or a universal wheel. When the universal wheel is used, it can facilitate the steering of the sample delivery box during movement.

[0040] like Figure 1As shown, in some selected embodiments, the pull rod 400 is arranged at the top of the box body 100 and is located on the side of the box body 100 away from the opening, and the roller 300 is arranged at the bottom of the box body 100 and is located on the side away from the opening, so that when the box body 10 is inclined by the pull rod 400, the roller 300 can provide rolling friction between the box body 10 and the ground. In addition, a support block 310 is arranged on the side of the bottom of the box body 100 close to the opening, so that when the box body 10 is in a vertical state, the support block 310 can support the box body 100 together with the roller 300, and the support block 310 can prevent the movement of the box body 10. Of course, in some other optional embodiments, the support block 310 can also be replaced by the roller 300, and the effect of preventing the movement of the box body 10 can be achieved through other external fixed structures.

[0041] like Figure 2 As shown, in some optional embodiments, the placement platform 500 includes a placement frame 510 and a flexible buffer pad 520 , the placement frame 510 is movably connected to the box body 100 along a first horizontal direction, and the flexible buffer pad 520 is installed on the placement frame 510 .

[0042] The placement frame 510 can provide rigid support for the flexible buffer pad 520. The flexible buffer pad 520 can be moved in the first direction by the movement of the placement frame 510 in the first direction, that is, the flexible buffer pad 520 is pushed into or pulled out of the accommodating cavity 110. The placement groove 521 is formed on the flexible buffer pad 520, so that the placement groove 521 can play a certain flexible supporting role for the sampling syringe 20 placed in the placement groove 521. When a collision occurs, it can play a buffering role, further preventing the sampling syringe 20 from being damaged due to the collision. At the same time, the placement platform 500 is set as the placement frame 510 and the flexible buffer pad 520. When the sampling syringe 20 after sampling needs to be taken out from the placement platform 500 when arriving at the laboratory, the flexible buffer pad 520 can be directly taken out from the placement frame 510, thereby realizing the function of quickly taking out multiple sampling syringes 20.

[0043] like Figure 2 and Figure 3As shown, in some optional embodiments, the placement frame 510 includes an annular frame 511 and a support plate 512, the placement frame 510 includes an annular frame 511 and a support plate 512, the annular frame 511 is movably connected to the box body 100 along the first horizontal direction, the bottom of the annular frame 511 is formed with a support flange 5111 protruding toward the inner side of the annular frame 511, the support plate 512 is located on the inner side of the annular frame 511 and is detachably placed on the support flange 5111, and the flexible buffer pad 520 is fixed on the support plate 512. Among them, the label slot 522 is formed on the upper surface of the support plate 512, and the flexible buffer pad 520 exposes the label slot 522; or, the label slot 522 is formed on the upper surface of the flexible buffer pad 520.

[0044] The annular frame 511 encloses a through hole 5112, and the support flange 5111 provides a mounting base for the support plate 512, so that the support plate 512 can be covered at the through hole 5112. When the support plate 512 needs to be removed from the annular frame 511, the sampling personnel can apply force upward from the through hole 5112 at the bottom of the annular frame 511 to lift the support plate 512, so that the support plate 512 is separated from the annular frame 511, which facilitates the separation of the support plate 512 from the annular frame 511. The flexible buffer pad 520 is fixed on the support plate 512, and the support plate 512 provides a rigid support for the flexible buffer pad 520, so that the flexible buffer pad 520 will not be greatly deformed when the entirety is taken out of the annular frame 511, which may cause the sampling syringe 20 or the label to fall off from the flexible buffer pad 520. Furthermore, by setting the label slot 522 on the upper surface of the support plate 512 or the upper surface of the flexible buffer pad 520, the label slot 522 can move synchronously with the flexible buffer pad 520, so that the label placed in the label slot 522 and the sampling syringe 20 placed in the placement slot 521 remain corresponding, avoiding confusion of the sampling syringes 20.

[0045] It should be noted that the methods of fixing the flexible buffer pad 520 to the support plate 512 include but are not limited to adhesive fixing and crimping fixing.

[0046] Since the tail of the syringe of the sampling syringe 20 has a finger handle for applying force, the size of the head of the sampling syringe 20 is smaller than the size of the tail of the sampling syringe 20. In order to arrange the sampling syringes 20 more compactly, the placement platform 500 can be used to place more sampling syringes 20, such as Figure 4As shown, in some optional embodiments, the two ends of the placement slot 521 are respectively a head end 5211 and a tail end 5212, the head end 5211 is used to accommodate and fix the head of the sampling syringe 20, and the tail end 5212 is used to accommodate and fix the tail of the sampling syringe 20. In the arrangement direction of the plurality of placement slots 521, the head end 5211 of one placement slot 521 in every two adjacent placement slots 521 is adjacent to the tail end 5212 of the other placement slot 521. Thus, the arrangement of the placement slots 521 is more compact, and more placement slots 521 can be accommodated.

[0047] Regarding the arrangement direction of the multiple placement slots 521 on the same placement platform 500, in some optional embodiments, the multiple placement slots 521 are arranged at intervals along the second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction. Since the placement platform 500 can be pushed into or pulled out of the accommodating cavity 110 along the first horizontal direction, the placement slots 521 are arranged along the second horizontal direction perpendicular to the first horizontal direction, so that the multiple placement slots 521 can be exposed or stored at the same time, which is convenient for operators to select.

[0048] like Figure 1 As shown, in some optional embodiments, the opposite ends of the placement platform 500 are movably connected to the opposite cavity walls of the accommodating cavity 110 through the slide rails 600, and the sliding direction of the slide rails 600 is the first horizontal direction. The placement platform 500 is installed on the cavity wall of the accommodating cavity 110 through the slide rails 600, and the placement platform 500 can be smoothly pushed into or pulled out of the accommodating cavity 110 along the first direction through the slide rails 600.

[0049] It should be noted that the slide rail 600 generally includes a slide groove, and a slider adapted to the slide groove is provided on the placement platform 500, so that the slider is connected to the slide groove and can slide along the extension direction of the rail.

[0050] Optionally, in order to reduce the risk of the placement platform 500 falling off the slide rail 600, the slide rail 600 may be a damping slide rail 600, so that the placement platform 500 can stay in the pulled-out position after being pulled out. Of course, the slide rail 600 may also be a common slide rail 600 with a limiting structure to reduce the risk of the placement platform 500 falling off the slide rail 600.

[0051] like Figure 5As shown, in order to prevent the placement platform 500 from moving relative to the cavity wall of the accommodating cavity 110 and colliding with it during the movement of the sampling syringe delivery box. In some optional embodiments, a magnetic adsorption member 700 is provided on the side of the placement platform 500 away from the outlet, and the magnetic adsorption member 700 can be magnetically connected to the cavity wall of the accommodating cavity 110. After the placement platform 500 is pushed into the accommodating cavity 110, the placement platform 500 can be relatively fixed to the cavity wall of the accommodating cavity 110 through the magnetic member, so as to prevent the placement platform 500 and the accommodating cavity 110 from moving relative to each other during the movement of the sampling syringe delivery box.

[0052] It should be noted that the cavity wall of the accommodating cavity 110 facing the opening is adsorbed and connected to the magnetic adsorption component 700. Specifically, the cavity wall can be made of a metal that can be adsorbed by the magnetic adsorption component 700, or the magnetic adsorption component 700 is also provided on the cavity wall, and the magnetic adsorption component 700 on the cavity wall can be magnetically connected to the magnetic adsorption component 700 on the placement platform 500.

[0053] In order to prevent the placement platform 500 from being easily pulled out of the opening, in some optional embodiments, the magnetic adsorption member 700 is a soft magnetic strip, and the magnetic attraction of the soft magnetic strip is much smaller than the magnetic force of hard magnets such as neodymium boron magnets. This allows the placement platform 500 to be relatively fixed to the cavity wall of the accommodating cavity 110 through the soft magnetic strip, and to be easily pulled. The use of a soft magnetic strip as the magnetic adsorption member 700 can also play a certain buffering role, reducing the collision between the placement platform 500 and the cavity wall of the accommodating cavity 110 after being pushed into the accommodating cavity 110, resulting in a large-scale shaking of the sampling syringe 20.

[0054] The box door 200 can be connected to any position of the opening of the box body 100 so that the box door 200 can cover or open the opening. In order to further reduce the impact of the box opening on the operator pushing and pulling the placement platform 500 and taking and placing the sampling syringe 20, in some optional embodiments, the upper end of the box door 200 is hinged to the top of the opening of the box body 100 and the lower end of the box door 200 can be turned over to overlap the top of the box body 100, and the lower end of the box door 200 can be unlocked and locked on the box body 100 through a locking structure to cover the opening.

[0055] The upper end of the box door 200 is hinged to the upper part of the opening of the box body 100, so that the box door 200 can be opened upward, and the lower end of the box door 200 can be turned over to overlap the top of the box body 100, so that the box door 200 will not affect the operator's operation at the opening (pushing and pulling the placement platform 500 and taking and placing the sampling syringe 20). At the same time, when it is necessary to move the sampling syringe delivery box, the box door 200 can be turned over to cover the opening, and the lower end of the box door 200 can be locked and fixed to the box body 100 through a locking structure to prevent the items in the box body 100 from falling from the opening, and it can also play a dust-proof role and protect the sampling syringe 20 to a certain extent.

[0056] It should be noted that the specific structure of the locking structure includes but is not limited to a lock buckle structure, a magnetic structure, a lock core structure, etc., and the present disclosure does not make any specific restrictions on this.

[0057] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0058] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0059] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A sampling syringe sample delivery box, characterized in that: include: The box body comprises a box body, a box door, a roller and a pull rod, wherein the box body has a receiving cavity inside, the side of the box body has an opening communicating with the receiving cavity, the box door is movably connected to the box body and used to cover or expose the opening, the pull rod is installed on the box body, and the roller is arranged at the bottom of the box body; A placement platform, wherein there are multiple placement platforms, and the multiple placement platforms are arranged in the accommodating cavity at intervals along the vertical direction of the box body, and each of the placement platforms is movably connected to the box body along a first horizontal direction so as to be able to be pushed into or pulled out of the accommodating cavity through the opening. Each of the placement platforms has multiple placement grooves with openings facing upward, and the placement grooves are used to accommodate and fix sampling syringes. Each of the placement platforms also has multiple label grooves arranged in a one-to-one correspondence with the multiple placement grooves, and the label grooves are used to insert sample labels.

2. The sampling syringe sample delivery box according to claim 1, characterized in that: The placement platform includes a placement frame and a flexible buffer pad. The placement frame is movably connected to the box body along the first horizontal direction, and the flexible buffer pad is installed on the placement frame.

3. The sampling syringe sample delivery box according to claim 2, characterized in that: The placing frame comprises an annular frame and a support plate, wherein the annular frame is movably connected to the box body along the first horizontal direction, a support flange protruding toward the inner side of the annular frame is formed at the bottom of the annular frame, the support plate is located at the inner side of the annular frame and is detachably placed on the support flange, and the flexible buffer pad is fixed on the support plate; Wherein, the label slot is formed on the upper surface of the support plate, and the flexible buffer pad exposes the label slot; or, the label slot is formed on the upper surface of the flexible buffer pad.

4. The sampling syringe sample delivery box according to claim 1, characterized in that: The two ends of the placement slot are respectively a head end and a tail end, the head end is used to accommodate and fix the head of the sampling syringe, and the tail end is used to accommodate and fix the tail of the sampling syringe. In the arrangement direction of the multiple placement slots, the head end of one placement slot in every two adjacent placement slots is adjacent to the tail end of the other placement slot.

5. The sampling syringe delivery box according to any one of claims 1 to 4, characterized in that: The plurality of placement grooves are spaced apart along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

6. The sampling syringe delivery box according to any one of claims 1 to 4, characterized in that: The opposite ends of the placement platform are movably connected to the opposite cavity walls of the accommodating cavity through slide rails, and the sliding direction of the slide rails is a first horizontal direction.

7. The sampling syringe sample delivery box according to claim 6, characterized in that: The slide rail is a damping slide rail.

8. The sampling syringe delivery box according to any one of claims 1 to 4, characterized in that: A magnetic adsorption component is arranged on a side of the placement platform away from the opening, and the magnetic adsorption component can be magnetically connected to the cavity wall of the accommodating cavity.

9. The sampling syringe sample delivery box according to claim 8, characterized in that: The magnetic adsorption component is a soft magnetic strip.

10. The sampling syringe delivery box according to any one of claims 1 to 4, characterized in that: The upper end of the box door is hinged above the opening of the box body and the lower end of the box door can be flipped to overlap the top of the box body. The lower end of the box door can be unlockably locked on the box body through a locking structure to cover the opening.

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