Environment-friendly luggage with intelligent unlocking structure

Abstract

The invention discloses an environment-friendly suitcase with an intelligent unlocking structure, and relates to the field of environment-friendly suitcases, the environment-friendly suitcase comprises a case body and a case cover rotatably mounted at the upper end of the case body, a lifting handle is rotatably mounted on the outer side of the case body, transparent plates are fixedly mounted in the front end and the rear end of the case body, and supporting legs are fixedly mounted at the lower end of the case body; an adjusting plate is slidably mounted in the box body, telescopic plates are mounted in the box body in a clamped mode, and the telescopic plates are located at the front end and the rear end of the adjusting plate. According to the environment-friendly case with the intelligent unlocking structure, the case cover is opened by controlling the sliding handle and the pressing piece at the same time, the opening complexity of the case cover is increased, the distance between the sliding handle and the pressing piece is controlled to be larger than the palm size of a common child, the child can be prevented from opening the case at will, and articles in the case body are protected; and the use safety of the luggage is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of environmentally friendly luggage, and in particular to an environmentally friendly luggage provided with an intelligent unlocking structure. Background Art

[0002] In daily life, people use bags to store clothes and other items, and environmentally friendly bags are the first choice for people, because they can be recycled after being damaged, reducing the harm to the environment. However, the existing luggage still has certain use defects during use. In order to ventilate the clothes, most of the existing clothing storage boxes have ventilation slots on the clothing storage boxes to ventilate the clothes. This will cause a problem that when the drying device dries the clothes, a large amount of heat in the clothing storage box will be lost through the ventilation slots, which not only requires more heat to dry the clothes, but also wastes a lot of electricity, and the drying rate of the clothes is also low; Patent application No. 202221471268.X discloses a storage box for intelligent drying of clothes. The clothes stored in the storage box body are dried by a heating mechanism. During drying, a large amount of heat loss in the storage box body can be effectively prevented. The setting of the baffle facilitates the heated air to fill the interior of the storage box body, which is convenient for better heating of the clothes and effectively prevents the heat in the storage box body from being lost from the vent during heating. It can not only save electricity resources, but also quickly dry the clothes. Patent application No. 202021679467.0 discloses a clothing storage box with good mildew and moisture-proof effects, which achieves the purpose of the clothing storage box having good mildew and moisture-proof effects, solves the problem that the general clothing storage box has poor mildew and moisture-proof effects, effectively blocks the entry of external water vapor, and ensures that people's clothes will not mold during long-term storage, further prolongs the service life of clothes, thereby meeting people's use needs and giving people more peace of mind in the process of using the clothing storage box. Through the mutual cooperation of the universal wheel body, the fixed rod, the movable shaft and the handle, the purpose of the clothing storage box being easy to move is achieved, effectively avoiding the wear and tear of the bottom and the ground, saving people's use costs, and making people more convenient in daily use, thereby meeting people's use needs; In the above-mentioned public patent, the box in the patent solves the above-mentioned problems, but the box in the patent still has the following problems. During the use of the box, the storage and retrieval of items are achieved by closing and opening the box lid and the box body. After the box body and the box lid are closed, they are locked directly by gravity. Children at home can easily open it and take out the items in the box, which can easily lead to the loss and contamination of the items. As a result, the box lacks the effect of intelligent self-locking, which can easily reduce the safety of the luggage.

[0003] In view of the above problems, it is urgent to carry out innovative design based on the original luggage structure. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly luggage with an intelligent unlocking structure to solve the problem proposed in the above background technology that after the box body and the box lid are closed, they are directly locked by gravity, and children at home can easily open it and take out the items in the box, which may easily lead to the loss and contamination of the items, resulting in the box body lacking the intelligent self-locking effect, which may easily reduce the safety of the luggage.

[0005] To achieve the above object, the present invention provides the following technical solutions: an environmentally friendly bag with an intelligent unlocking structure, comprising a box body and a box cover rotatably mounted on the upper end of the box body; A lifting handle is rotatably mounted on the outer side of the box, and transparent plates are fixedly mounted inside the front and rear ends of the box, and a supporting foot is fixedly mounted on the lower end of the box, an adjustment plate is slidably mounted inside the box, and a telescopic plate is snap-fitted inside the box, and the telescopic plate is located at the front and rear ends of the adjustment plate; The box body is provided with a self-locking structure for controlling the closing of the box cover, the box body is provided with an unlocking structure for controlling the opening of the box cover, and the box body is provided with an adjustment structure for controlling the internal space of the box body.

[0006] Preferably, the self-locking structure includes a fixed block and a limit card block, the fixed block is fixedly installed at the lower end of the box cover, and the limit card block is slidably installed inside the fixed block, and the limit card block is engaged and connected with the box body, and at the same time, the limit card block is arranged in an inclined shape when viewed from the side at one end close to the box body.

[0007] Preferably, a support spring is fixedly installed at one end of the limit block away from the box body, and one end of the support spring away from the limit block is fixedly connected to the fixed block, and a lubricating ball is nested at the lower end of the limit block.

[0008] Preferably, the unlocking structure includes a sliding handle, and the sliding handle is slidably mounted on the outside of the box cover, and an inclined telescopic rod is fixedly mounted on the lower end of the sliding handle, and the inclined telescopic rod is located inside the box body.

[0009] Preferably, a first magnetic block is fixedly installed at one end of the tilt telescopic rod close to the box, and a second magnetic block is fixedly installed inside the box, and the second magnetic block and the first magnetic block have opposite magnetic poles, and the first magnetic block and the second magnetic block are tightly attracted.

[0010] Preferably, a return spring is fixedly installed on one end of the sliding handle away from the tilted telescopic rod, and the end of the return spring away from the sliding handle is fixedly connected to the box cover, and two groups of return springs, sliding handles and tilted telescopic rods are symmetrically arranged about the vertical center axis of the box cover.

[0011] Preferably, the unlocking structure also includes a pressing piece and an air supply bag, and the pressing piece is slidably installed inside the box cover, and an air supply bag is provided inside the box cover. At the same time, two groups of air supply bags and pressing pieces are provided inside the box cover, and the pressing piece and the air supply bag are located at the upper end of the sliding handle.

[0012] Preferably, an air supply pipe is fixedly installed on the outside of the air supply airbag, and a pushing airbag is fixedly installed on the end of the air supply airbag away from the air supply airbag, and the pushing airbag is located inside the fixed block, and the pushing airbag is in close contact with the limiting block, and the volume of the pushing airbag is smaller than that of the air supply airbag.

[0013] Preferably, the adjustment structure comprises a vertical telescopic rod, and the vertical telescopic rod is rotatably mounted inside the adjustment plate, and a driving bevel gear is slidably mounted on the outer side of the vertical telescopic rod, and the driving bevel gear is rotatably connected to the adjustment plate.

[0014] Preferably, the adjustment structure further comprises a driven rod, and the driven rod is rotatably mounted inside the adjustment plate, and a driven bevel gear is fixedly mounted on one end of the adjustment plate close to the vertical telescopic rod, the driven bevel gear is meshedly connected with the driving bevel gear, and the radius of the driving bevel gear is larger than the radius of the driven bevel gear; The end of the driven rod away from the driving bevel gear is threadedly mounted with a limiting block, and the limiting block; The box body is provided with positioning grooves and limiting square grooves at equal intervals inside, and the positioning grooves and limiting square grooves are arranged correspondingly, and the limiting square grooves are engaged and connected with the limiting square blocks, and the positioning grooves are engaged and connected with the vertical telescopic rods. The adjustment plate is provided with a storage groove inside, and the storage groove is located on the outside of the limiting square blocks, and the length of the limiting square blocks is less than the length of the storage groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The lid is opened by controlling the sliding handle and the pressing piece at the same time, which increases the complexity of opening the lid. The distance between the sliding handle and the pressing piece is controlled to be larger than the size of a child's palm, which can prevent children from opening the lid at will, protect the items in the box, and improve the safety of the luggage. 2. By making the box body and the box cover into aluminum alloy, and the adjustment plate and the telescopic plate into degradable plastic material, the box bag can be recycled after being damaged, and can be treated without pollution, thus achieving an environmentally friendly effect; 3. Furthermore, the automatic locking of the luggage can be achieved by closing the lid, which can save the process of manually locking the luggage and improve the convenience of using the luggage; 4. Furthermore, by providing a movable adjustment plate and a telescopic plate inside the bag, the space inside the box can be adjusted so that the inside of the box is suitable for storing items of different sizes, which greatly improves the convenience of using the bag; 5. Furthermore, by limiting the adjustment plate inside the bag, the stability of the use of the internal space of the bag can be ensured, and the stability of the support of the adjustment plate can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the adjustment plate of the present invention; Figure 3 It is a left sectional structural schematic diagram of the adjustment plate of the present invention; Figure 4 It is a front cross-sectional structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the front view structure of the tilt telescopic rod of the present invention; Figure 6 It is a left sectional structural schematic diagram of the limit clamp block of the present invention; Figure 7 This is a front view structural diagram of the fixing block of the present invention; Figure 8 It is a schematic diagram of the top cross-sectional structure of the present invention; Fig. 9 This is a schematic diagram of the front cross-sectional structure of the adjustment plate of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the adjustment plate of the present invention.

[0017] In the figure: 1. box body; 2. box cover; 3. lifting handle; 4. transparent plate; 5. supporting foot; 6. adjustment plate; 7. telescopic plate; 8. fixing block; 9. limiting block; 10. supporting spring; 11. lubricating ball; 12. pushing airbag; 13. sliding handle; 14. reset spring; 15. tilting telescopic rod; 16. first magnetic block; 17. second magnetic block; 18. pressing piece; 19. air supply airbag; 20. air supply pipe; 21. vertical telescopic rod; 22. driving bevel gear; 23. driven rod; 24. driven bevel gear; 25. limiting block; 26. limiting square groove; 27. positioning groove; 28. storage groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: This embodiment Figure 1-Figure 7 As shown, in order to solve the problem that the existing luggage is difficult to self-lock, the process of self-locking the luggage is disclosed, and the effect that the luggage can be self-locked is achieved. The specific contents are as follows: A box body 1 and a box cover 2 rotatably mounted on the upper end of the box body 1; A lifting handle 3 is rotatably mounted on the outer side of the box body 1, and a transparent plate 4 is fixedly mounted inside the front and rear ends of the box body 1, and a supporting foot 5 is fixedly mounted on the lower end of the box body 1, an adjustment plate 6 is slidably mounted inside the box body 1, and a telescopic plate 7 is snap-fittedly mounted inside the box body 1, and the telescopic plate 7 is located at the front and rear ends of the adjustment plate 6; The box body 1 is provided with a self-locking structure for controlling the closing of the box cover 2; The self-locking structure includes a fixed block 8 and a limit block 9. The fixed block 8 is fixedly mounted on the lower end of the box cover 2, and the limit block 9 is slidably mounted inside the fixed block 8. The limit block 9 is engaged with the box body 1, and the end of the limit block 9 close to the box body 1 is inclined when viewed from the side. A support spring 10 is fixedly installed at one end of the limit block 9 away from the box body 1, and one end of the support spring 10 away from the limit block 9 is fixedly connected to the fixed block 8, and a lubricating ball 11 is nested at the lower end of the limit block 9.

[0020] When using the environmentally friendly bag with the intelligent unlocking structure, first place the environmentally friendly bag at the location where work is required, and then place items inside the bag after the bag is placed at the required location; The box body 1 and the box cover 2 inside the bag are made of aluminum alloy material, which can prevent the bag from being oxidized during use. At the same time, the adjustment plate 6 and the telescopic plate 7 are made of degradable plastic plates. When the bag is damaged after long-term use, it can be directly treated without pollution. After the box cover 2 is opened, household clothes or other items can be placed inside the box body 1, and can be placed inside the space between the adjustment plate 6 and the telescopic plate 7, so as to avoid the situation that the items are placed in a mess inside the box bag, thereby ensuring the practicality of the box bag; After the bag is used, the box cover 2 can be turned over and closed with the box cover 2. During this process, the box cover 2 can be rotated toward the upper end of the box body 1. At this time, the limit card block 9 will contact the box body 1 and be squeezed by the box body 1, so that the limit card block 9 slides toward the inside of the fixed block 8. At this time, the limit card block 9 will squeeze the support spring 10 and make the support spring 10 shrink. After the box cover 2 and the box body 1 are closed, the shrinking support spring 10 will expand and push the limit card block 9 to move. During the movement of the limit card block 9, it will engage with the box body 1, thereby completing the self-locking process of the box body 1 and the box cover 2, effectively improving the convenience and safety of using the bag.

[0021] Embodiment 2: This embodiment is as follows Figure 1-Figure 6 As shown, in order to solve the problem that the luggage is easy to open and children may drop the items inside the luggage, the process of unlocking and opening the luggage is disclosed, and the effect that the luggage can be intelligently unlocked is achieved, and the specific content is as follows: The inside of the box body 1 is provided with an unlocking structure for controlling the box cover 2 to be opened; The unlocking structure includes a sliding handle 13, and the sliding handle 13 is slidably mounted on the outside of the box cover 2, and a tilting telescopic rod 15 is fixedly mounted on the lower end of the sliding handle 13, and the tilting telescopic rod 15 is located inside the box body 1; A first magnetic block 16 is fixedly installed at one end of the tilt telescopic rod 15 close to the box body 1, and a second magnetic block 17 is fixedly installed inside the box body 1, and the second magnetic block 17 and the first magnetic block 16 have opposite magnetic poles, and the first magnetic block 16 and the second magnetic block 17 are tightly attracted; A return spring 14 is fixedly installed at one end of the sliding handle 13 away from the tilting telescopic rod 15, and one end of the return spring 14 away from the sliding handle 13 is fixedly connected to the box cover 2, and the return spring 14, the sliding handle 13 and the tilting telescopic rod 15 are symmetrically arranged in two groups about the vertical center axis of the box cover 2; The unlocking structure further includes a pressing member 18 and an air supply bag 19, and the pressing member 18 is slidably mounted inside the box cover 2, and the air supply bag 19 is arranged inside the box cover 2, and two groups of the air supply bag 19 and the pressing member 18 are arranged inside the box cover 2, and the pressing member 18 and the air supply bag 19 are located at the upper end of the sliding handle 13; An air supply pipe 20 is fixedly installed on the outside of the air supply airbag 19, and a pushing airbag 12 is fixedly installed on the end of the air supply airbag 19 away from the air supply airbag 19, and the pushing airbag 12 is located inside the fixed block 8. At the same time, the pushing airbag 12 is in close contact with the limiting block 9, and the volume of the pushing airbag 12 is smaller than the volume of the air supply airbag 19.

[0022] When using the environmentally friendly luggage with the intelligent unlocking structure, the case cover 2 needs to be opened from the upper end of the case body 1. During this process, the user needs to pull the two sets of sliding handles 13 to move and move the two sets of sliding handles 13 away from each other. During the movement of the sliding handles 13, the reset spring 14 is squeezed and the reset spring 14 is contracted. At the same time, the sliding handles 13 drive the tilt telescopic rod 15 to move and separate the first magnetic block 16 and the second magnetic block 17 outside the tilt telescopic rod 15. After the first magnetic block 16 and the second magnetic block 17 are separated, the tilt telescopic rod 15 will contract under the action of gravity. After that, the user needs to press the two sets of pressing members 18 with the index finger. The pressing members 18 move during the squeezing process and squeeze the air supply airbag 19. After the air supply airbag 19 is squeezed, it supplies air to the inside of the pushing airbag 12 through the air supply pipe 20. At this time, the pushing airbag 12 will expand and push the limit block 9 to move. The limit block 9 will separate from the box body 1 when it moves. At this time, the sliding handle 13 can be pushed to move upward and the box cover 2 is in the open state. By pushing the two sets of sliding handles 13 and pressing the pressing member 18 to open the case cover 2, it can be prevented that children at home open the case privately and discard the items inside the case at will, causing the items to be lost or contaminated.

[0023] Embodiment 3: This embodiment is as follows Figure 1-Figure 3 and Figure 8-Figure 10 As shown, in order to solve the problem of fixed space inside the existing luggage, the process of adjusting the space inside the luggage is disclosed, so that the luggage can be used to store different items. The specific contents are as follows: The interior of the box body 1 is provided with an adjustment structure for controlling the internal space of the box body 1; The adjustment structure includes a vertical telescopic rod 21, and the vertical telescopic rod 21 is rotatably mounted inside the adjustment plate 6, and a driving bevel gear 22 is slidably mounted on the outer side of the vertical telescopic rod 21, and the driving bevel gear 22 is rotatably connected to the adjustment plate 6; The adjustment structure also includes a driven rod 23, and the driven rod 23 is rotatably mounted inside the adjustment plate 6, and a driven bevel gear 24 is fixedly mounted on one end of the adjustment plate 6 close to the vertical telescopic rod 21, and the driven bevel gear 24 is meshed and connected with the driving bevel gear 22, and the radius of the driving bevel gear 22 is larger than the radius of the driven bevel gear 24; The end of the driven rod 23 away from the driving bevel gear 22 is threadedly mounted with a limiting block 25, and the limiting block 25; The interior of the box body 1 is equidistantly provided with positioning grooves 27 and limiting square grooves 26, and the positioning grooves 27 and limiting square grooves 26 are correspondingly arranged, and the limiting square grooves 26 are engaged and connected with the limiting square block 25, and the positioning grooves 27 are engaged and connected with the vertical telescopic rod 21, and a storage groove 28 is provided inside the adjustment plate 6, and the storage groove 28 is located on the outside of the limiting square block 25, and the length of the limiting square block 25 is less than the length of the storage groove 28.

[0024] In the process of adjusting the space inside the bag, it is necessary to first pull the vertical telescopic rod 21 to move upward, and the vertical telescopic rod 21 will be separated from the positioning slot 27 during the upward movement of the vertical telescopic rod 21. After the positioning slot 27 is separated from the vertical telescopic rod 21, the vertical telescopic rod 21 can be rotated, and the rotation of the vertical telescopic rod 21 will drive the driving bevel gear 22 to rotate, and the driving bevel gear 22 will drive the driven bevel gear 24 meshing with it to rotate. At this time, the two sets of driven bevel gears 24 will drive the two sets of driven rods 23 to rotate, and the rotation of the driven rod 23 will cause the limiting block 25 and the limiting square slot 26 to move away and toward the storage The internal movement of the groove 28 can push the adjustment plate 6 to slide inside the box body 1 after the limiting block 25 is separated from the limiting square groove 26. During the sliding of the adjustment plate 6, the telescopic plate 7 will expand and contract, and after the adjustment plate 6 moves to the required position, the vertical telescopic rod 21 will move downward. At this time, the vertical telescopic rod 21 will be engaged with another set of positioning grooves 27, and the vertical telescopic rod 21 needs to be rotated in the opposite direction at this time, so that the two sets of limiting blocks 25 inside the adjustment plate 6 are engaged with the limiting square grooves 26 again, completing the space adjustment process inside the luggage, effectively improving the applicability of the luggage and increasing the overall practicality.

[0025] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly luggage with an intelligent unlocking structure, comprising a box body (1) and a box cover (2) rotatably mounted on the upper end of the box body (1); Features: A lifting handle (3) is rotatably mounted on the outer side of the box (1), and transparent plates (4) are fixedly mounted inside the front and rear ends of the box (1), and supporting feet (5) are fixedly mounted on the lower end of the box (1), an adjustment plate (6) is slidably mounted inside the box (1), and a telescopic plate (7) is snap-fittedly mounted inside the box (1), and the telescopic plate (7) is located at the front and rear ends of the adjustment plate (6); The box body (1) is provided with a self-locking structure for controlling the closing of the box cover (2), the box body (1) is provided with an unlocking structure for controlling the opening of the box cover (2), and the box body (1) is provided with an adjustment structure for controlling the internal space of the box body (1).

2. The environmentally friendly luggage with an intelligent unlocking structure according to claim 1, characterized in that: The self-locking structure comprises a fixed block (8) and a limit block (9), wherein the fixed block (8) is fixedly mounted on the lower end of the box cover (2), and the limit block (9) is slidably mounted inside the fixed block (8), and the limit block (9) is engaged and connected with the box body (1), and an end of the limit block (9) close to the box body (1) is arranged in an inclined shape when viewed from the side.

3. The environmentally friendly luggage with intelligent unlocking structure according to claim 2, characterized in that: A support spring (10) is fixedly mounted on one end of the limit block (9) away from the box body (1), and an end of the support spring (10) away from the limit block (9) is fixedly connected to the fixed block (8), and a lubricating ball (11) is nested and mounted on the lower end of the limit block (9).

4. The environmentally friendly luggage with an intelligent unlocking structure according to claim 1, characterized in that: The unlocking structure comprises a sliding handle (13), and the sliding handle (13) is slidably mounted on the outside of the box cover (2), and a tilting telescopic rod (15) is fixedly mounted on the lower end of the sliding handle (13), and the tilting telescopic rod (15) is located inside the box body (1).

5. The environmentally friendly luggage with intelligent unlocking structure according to claim 4, characterized in that: A first magnetic block (16) is fixedly mounted on one end of the tilting telescopic rod (15) close to the box body (1), and a second magnetic block (17) is fixedly mounted inside the box body (1), and the second magnetic block (17) and the first magnetic block (16) have opposite magnetic poles, and the first magnetic block (16) and the second magnetic block (17) are tightly attracted.

6. The environmentally friendly luggage with intelligent unlocking structure according to claim 4, characterized in that: A return spring (14) is fixedly mounted on one end of the sliding handle (13) away from the tilting telescopic rod (15), and one end of the return spring (14) away from the sliding handle (13) is fixedly connected to the box cover (2), and two groups of the return spring (14), the sliding handle (13) and the tilting telescopic rod (15) are symmetrically arranged about the vertical center axis of the box cover (2).

7. The environmentally friendly luggage with an intelligent unlocking structure according to claim 1, characterized in that: The unlocking structure further comprises a pressing member (18) and an air supply bag (19), wherein the pressing member (18) is slidably mounted inside the box cover (2), and an air supply bag (19) is arranged inside the box cover (2), and two groups of the air supply bag (19) and the pressing member (18) are arranged inside the box cover (2), and the pressing member (18) and the air supply bag (19) are located at the upper end of the sliding handle (13).

8. The environmentally friendly luggage with intelligent unlocking structure according to claim 7, characterized in that: An air supply pipe (20) is fixedly mounted on the outer side of the air supply airbag (19), and a push airbag (12) is fixedly mounted on one end of the air supply pipe (20) away from the air supply airbag (19), and the push airbag (12) is located inside the fixed block (8), and the push airbag (12) is in close contact with the limit block (9), and the volume of the push airbag (12) is smaller than the volume of the air supply airbag (19).

9. The environmentally friendly luggage with an intelligent unlocking structure according to claim 1, characterized in that: The adjustment structure comprises a vertical telescopic rod (21), and the vertical telescopic rod (21) is rotatably mounted inside the adjustment plate (6), and a driving bevel gear (22) is slidably mounted on the outer side of the vertical telescopic rod (21), and the driving bevel gear (22) is rotatably connected to the adjustment plate (6).

10. The environmentally friendly luggage with intelligent unlocking structure according to claim 1, characterized in that: The adjustment structure further comprises a driven rod (23), and the driven rod (23) is rotatably mounted inside the adjustment plate (6), and a driven bevel gear (24) is fixedly mounted on one end of the adjustment plate (6) close to the vertical telescopic rod (21), the driven bevel gear (24) is meshingly connected with the driving bevel gear (22), and the radius of the driving bevel gear (22) is larger than the radius of the driven bevel gear (24); A limiting block (25) is threadedly mounted on one end of the driven rod (23) away from the driving bevel gear (22), and the limiting block (25); The box body (1) is provided with positioning grooves (27) and limiting square grooves (26) at equal intervals, and the positioning grooves (27) and the limiting square grooves (26) are arranged correspondingly, and the limiting square grooves (26) are snap-fitted and connected with the limiting square block (25), and the positioning grooves (27) are snap-fitted and connected with the vertical telescopic rod (21), and the adjustment plate (6) is provided with a storage groove (28) inside, and the storage groove (28) is located outside the limiting square block (25), and the length of the limiting square block (25) is smaller than the length of the storage groove (28).

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