Portable water pump control box with protection function

Abstract

The application discloses a portable water pump control box with a protection function, and relates to the technical field of water pump control boxes.The water pump control box comprises a box body, a storage structure and a carrying structure.A control assembly is arranged in the inner cavity of the box body.A box cover capable of rotating around the side wall of the box body to open and close is arranged at the port position of the box body.The storage structure is arranged in the inner cavity of the box body, so that the inner cavity of the box body is positioned to control the control assembly.The carrying structure is arranged on the side of the box body away from the box cover.The storage structure arranged in the box body not only makes the taking and placing of the control assembly in the box body more convenient, but also provides a protection function, avoids the vibration and collision of the box body during carrying from causing the control assembly to malfunction or be damaged, and, in combination with the use of the carrying structure, makes the user carrying the water pump control box walk more convenient and labor-saving, so that the use demand of the water pump control box in remote outdoor areas is improved.

Description

Technical Field

[0001] This invention relates to the field of water pump control box technology, and in particular to a portable water pump control box with protective functions. Background Technology

[0002] Currently, there are various types of water pump control boxes on the market with different functions. Some of these water pump control boxes are designed to be used in outdoor (wilderness) pools or reservoirs, solving the problems of power transmission and monitoring difficulties in remote outdoor areas. These water pump control boxes effectively ensure the convenient and efficient use of water pumps in remote outdoor areas by integrating outdoor power supply, monitoring and alarm units, and wireless control units.

[0003] However, current water pump control boxes have simple structures and limited functions, only serving a single integration function for these functional units. When used in remote outdoor areas, users need to walk to reach the work area, which means that the water pump control box needs to be carried by hand, making it inconvenient for users to carry and use. At the same time, collisions and vibrations caused by road bumps can easily damage the internal components of the control box, resulting in low protection of the water pump control box and increasing the damage rate, making it difficult to meet the needs of portable use. Therefore, a portable water pump control box with protective functions is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a portable water pump control box with protective functions to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a portable water pump control box with protective function, comprising:

[0006] The enclosure has a control assembly inside its interior cavity, and a cover that can be opened and closed by rotating around the side wall of the enclosure is located at the port of the enclosure.

[0007] A storage structure is provided in the inner cavity of the box, so that the inner cavity of the box is positioned and controlled by the storage structure.

[0008] A carrying structure is provided on the side of the box body away from the box cover.

[0009] Preferably, the storage structure includes:

[0010] Three carrier plates are stacked horizontally from bottom to top.

[0011] A foam template is fixedly embedded in a recessed groove at the top of a carrier plate, and the foam template is provided with a storage groove.

[0012] Elastic support members, which are multiple and fixedly installed between the carrier plate at the lower position and the bottom of the inner cavity of the box.

[0013] Preferably, the middle of both sides of the carrier plate located in the middle position is rotatably connected with a linkage rod, and the two side walls of the two carrier plates located at the upper and lower positions are symmetrically provided with straight sliding grooves. The top and bottom of the linkage rod are respectively movably inserted into the straight sliding grooves at the corresponding positions.

[0014] Preferably, the inner walls on both sides of the housing are provided with guide slots, the guide slots are composed of a rectangular part and an isosceles trapezoidal part connected to the top of the rectangular part, and the two ends of the bottom of the linkage rod are coaxially connected with ball bearings, the sidewalls of the ball bearings extend to the sidewalls of the guide slots.

[0015] Preferably, both sides of the carrier plate located at the upper position are fixedly connected to a locking shell. A retractable conical locking tongue is inserted into the side of the locking shell near the inner wall of the box. The end of the conical locking tongue extends to the top of the inner wall of the guide slot to limit and lock the position of the carrier plate. The locking shell is provided with an unlocking component, which drives the conical locking tongue to retract into the locking shell and separate from the guide slot to unlock.

[0016] Preferably, the unlocking component includes:

[0017] A connecting block is movably disposed within the locking housing. One end of the conical locking tongue extends into the locking housing and is fixed to the side wall of the connecting block. The top of the front of the connecting block is provided with an outwardly protruding serrated edge, and the bottom end of the serrated edge is serrated groove. A first spring is fixedly connected between the side of the connecting block away from the conical locking tongue and the inner wall of the locking housing.

[0018] The transmission gear has a top outer wall that meshes with the serrated groove at the bottom of the serrated protrusion, and a middle part that is rotatably connected to the inner wall of the locking housing.

[0019] A rack column, the sidewall of which meshes with the sidewall of the transmission gear, and the top of the rack column passes through the top of the conical locking tongue and extends upward.

[0020] Preferably, the carrying structure comprises two symmetrically arranged on the side of the box body away from the lid, and the carrying structure includes:

[0021] The carrying strap has one end fixedly connected to the end of the outer wall of the box, and the end of the carrying strap away from the box has a fixedly connected frame.

[0022] The strap has one end fixedly connected to the other end of the outer wall of the box, and the end of the strap away from the box is movably inserted into the frame.

[0023] Preferably, a protective pad is fixedly provided on the side of the box lid facing the box body, and a locking element is rotatably provided at the top edge of the box lid. One end of the locking element extends into the box body and is integrally formed with a fan-shaped plate, so that the locking element drives the fan-shaped plate to rotate and engage with the arc groove provided on the inner wall of the box body to lock the box lid at the top position of the box body.

[0024] Preferably, a handle is fixedly connected to the top of the locking element, and a safety structure is provided between the handle and the top of the lid, the safety structure being used to restrict the rotation of the handle.

[0025] Preferably, the insurance structure includes:

[0026] A convex block is fixedly connected to the end of the handle away from the locking element. A connecting sleeve is movably sleeved on the outer wall of the convex block, and a second spring is fixedly provided between the connecting sleeve and the convex block.

[0027] The insertion rod is fixedly connected to the side of the connecting sleeve away from the handle. A positioning sleeve is fixedly connected to the top of the box cover and below the insertion rod, so that the bottom of the insertion rod is inserted into the inside of the positioning sleeve to block and limit the rotation of the handle.

[0028] Compared with the prior art, the technical effects of the present invention are as follows:

[0029] (1) By setting up a storage structure inside the box, the present invention not only makes it more convenient to take out and put in the control assembly inside the box, but also provides protection to prevent the control assembly from malfunctioning or being damaged by vibration and collision during the carrying process. In addition, the use of the carrying structure makes it more convenient and less strenuous for users to carry the water pump control box, thereby improving the demand for the use of the water pump control box in remote outdoor areas.

[0030] (2) In the storage structure provided by the present invention, multiple carrier plates can be stacked to classify and store the components in the control assembly, and foam templates can be used to provide positioning and buffer protection. In addition, in conjunction with linkage rods, linear slides, elastic support components and guide slots, multiple carrier plates can be unfolded simultaneously for easy picking and putting while providing buffer protection.

[0031] (3) In the storage structure provided by the present invention, the unlocking component composed of the locking shell, connecting block, serrated protrusion, transmission gear, rack column and first spring cooperates with the conical locking tongue, so that the conical locking tongue can lock the position of multiple carrier plates after stacking by using the guide slot, which facilitates the storage of the carrier plates in the box. At the same time, the unlocking operation is convenient and quick, making the water pump control box more in line with the user's needs for efficient and convenient use. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0033] Figure 2 This is a three-dimensional structural diagram of the housing of the present invention.

[0034] Figure 3 This is a front view of the storage structure of the present invention.

[0035] Figure 4 This is a front cross-sectional view of the positioning component of the present invention.

[0036] Figure 5 This is a partial three-dimensional structural diagram of the housing of the present invention.

[0037] Figure 6 For the present invention Figure 1 A magnified schematic diagram of the structure at point A.

[0038] Figure 7 This is a front cross-sectional view of the handle of the present invention.

[0039] Figure 8 This is a bottom view of the housing structure of the present invention.

[0040] In the diagram: 100, Box body; 101, Box cover; 102, Carrier plate; 103, Linear slide; 104, Linkage rod; 105, Ball bearing; 106, Guide slot; 107, Elastic support; 108, Locking shell; 109, Conical locking tongue; 110, Connecting block; 111, First spring; 112, Serrated protrusion; 113, Transmission gear; 114, Rack column; 115, Foam template; 116, Locking fastener; 117, Handle; 118, Convex block; 119, Connecting sleeve; 120, Second spring; 121, Insert rod; 122, Positioning sleeve; 123, Shoulder strap; 124, Tie strap; 125, H-shaped frame. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] This invention provides, for example Figures 1-8 The image shows a portable water pump control box with protective features.

[0043] Example 1: The water pump control box includes a housing 100. The housing 100 contains a control assembly. In the prior art, the control assembly within the housing 100 typically consists of a solar panel, a solar generator, a power bank, a 4G mobile phone smart remote control switch, and a liquid level intelligent cloud alarm. The power bank supplies power to the water pump, and the solar panel, in conjunction with the solar generator, charges the power bank. This application of green energy meets energy conservation and emission reduction requirements, addresses the problem of limited power supply in remote outdoor areas, and ensures the applicability of the water pump. Furthermore, the liquid level intelligent cloud alarm can monitor the water depth at the pump's location, ensuring proper pump placement. An alarm is triggered when the water level approaches the critical value of the pump's operating level, allowing users to stop or change the pumping location in time, preventing the pump from running dry and easily malfunctioning. Additionally, a 4G smartphone smart remote control switch allows users to easily control the pump's start and stop via mobile devices, eliminating the need to wait at the pumping location for it to finish. Users can monitor the pump's operation from a resting position and intervene to control its start and stop as needed. In other embodiments, a monitoring camera can be configured to provide video surveillance of the pump's operating area, further enhancing the comprehensiveness of pump operation monitoring.

[0044] It should be noted that the box body 100 has a cover 101 at the port position that can rotate around the side wall of the box body 100 to open and close. The cover 101 and the side wall of the box body 100 are connected by a hinge, so that the cover 101 can be opened and closed by rotation, which facilitates the sealing and protection of the port of the box body 100. The storage structure is set in the inner cavity of the box body 100, and the inner cavity of the box body 100 is positioned and controlled by the storage structure. The storage structure includes three carrier plates 102, which are stacked horizontally from bottom to top. The foam template 115 is fixedly embedded in the recessed groove at the top of the carrier plate 102. The foam template 115 has a storage groove. The middle carrier plate 102 is rotatably connected to the middle of both sides. The upper and lower carrier plates 102 are symmetrically provided with straight sliding grooves 103 on both sides. The top and bottom of the linkage rods 104 are respectively The stacking arrangement of the carrier plates 102, which are movably connected to the corresponding linear slide grooves 103, allows the components of the control assembly to be categorized and placed on the corresponding carrier plates 102 for storage and positioning. This facilitates orderly retrieval and storage by the user, making the use or storage of the control assembly more systematic and improving the convenience and efficiency of assembly, use, disassembly, and storage. In addition, linkage rods 104 are provided on the front and rear sides of the three carrier plates 102. The middle part of the linkage rod 104 is rotatably connected to the middle part of the middle carrier plate 102. The top and bottom of the linkage rod 104 are movably connected to the linear slide grooves 103 on the side walls of the corresponding carrier plates 102. The rotation of the linkage rod 104 can be used to open or close the three carrier plates 102, causing them to move closer together or move away from each other. This allows the three carrier plates 102 to open or close synchronously, facilitating the retrieval or placement of control assembly components.

[0045] Furthermore, guide slots 106 are provided on both inner walls of the housing 100. Each guide slot 106 consists of a rectangular portion and an isosceles trapezoidal portion connected to the top of the rectangular portion. Both ends of the bottom of the linkage rod 104 are coaxially connected to ball bearings 105. The sidewalls of the ball bearings 105 extend to the sidewalls of the guide slots 106. Multiple elastic support members 107 are fixedly installed between the lower carrier plate 102 and the bottom of the inner cavity of the housing 100. The guide slots 106, composed of the rectangular portion and the isosceles trapezoidal portion, can gradually reduce their inner width in the vertical upward direction. This, combined with the inner wall of the guide slot 106 fitting against the outer wall of the ball bearings 105 coaxially connected to the bottom of the linkage rod 104, allows the lower carrier plate 102 to rise during the upward movement of the ball bearings. The squeezing action of the ball bearing 105 causes the two ends of the bottom of the linkage rod 104 to move closer together, thereby automatically opening the three carrier plates 102. This allows the three carrier plates 102 to automatically unfold as the lower carrier plate 102 rises from the bottom of the box 100. At the same time, when moving down for storage, the multiple carrier plates 102 move closer together to form a stack for easy storage, making the operation more convenient. In addition, the elastic support member 107 can provide elastic support. After the limiting effect on the carrier plate 102 is released, the elastic thrust provided by the elastic support member 107 can drive the carrier plate 102 to move upward. This can satisfy the driving force for unfolding the carrier plate 102. In the storage state, the elastic support member 107 can also provide a buffer protection function, reducing the impact of collision force on the carrier plate 102.

[0046] Furthermore, locking housings 108 are fixedly connected to both sides of the carrier plate 102 located at the upper position. A retractable conical locking tongue 109 is inserted into the side of the locking housing 108 near the inner wall of the housing 100. The end of the conical locking tongue 109 extends to the top of the inner wall of the guide slot 106 to limit and lock the position of the carrier plate 102. The locking housing 108 is provided with an unlocking component, which drives the conical locking tongue 109 to retract into the locking housing 108 and separate from the guide slot 106 to unlock. The unlocking component includes a connecting block 110, which is movably disposed in the locking housing 108. One end of the conical locking tongue 109 extends into the locking housing 108. The connecting block 110 is fixed to the side wall of the connecting block 110. The top of the front of the connecting block 110 has an outwardly protruding serrated edge 112, and the bottom end of the serrated edge 112 is serrated groove. The side of the connecting block 110 away from the conical locking tongue 109 is fixedly connected to the inner wall of the locking housing 108. The top of the outer wall of the transmission gear 113 is engaged with the serrated groove at the bottom end of the serrated edge 112. The middle part of the transmission gear 113 is rotatably connected to the inner wall of the locking housing 108. The side wall of the rack column 114 is engaged with the side wall of the transmission gear 113. The top of the rack column 114 passes through the top of the conical locking tongue 109 and extends upward. The three carrier plates 102 are inside the housing 100. When in the stacked storage state, the conical locking tongue 109 is located at the horizontal position at the bottom of the inner cavity of the guide slot 106. When the user needs to store multiple carrier plates 102 into the housing 100, they only need to apply downward pressure to the carrier plates 102, causing the multiple carrier plates 102 to move down and stack together. At the same time, the inclined surface at the bottom of the conical locking tongue 109 is squeezed into the locking housing 108 by the inner wall of the housing 100. When the conical locking tongue 109 moves to the top position of the inner cavity of the guide slot 106, the obstruction effect of the inner wall of the housing 100 on the conical locking tongue 109 disappears, and the conical locking tongue 109 extends and inserts into the guide slot 106 by the elastic thrust provided by the first spring 111. At the bottom of the 06 inner cavity, the top plane of the conical locking tongue 109 can block the upward movement of the conical locking tongue 109 by the guide slot 106, ensuring the stability of the carrier plate 102 in the stacked state inside the housing 100. When unlocking, simply press the rack column 114 down to drive the transmission gear 113 to rotate. With the engagement of the transmission gear 113 and the serrated protrusion 112, the connecting block 110 and the conical locking tongue 109 can be moved to the inside of the locking housing 108. The conical locking tongue 109 is pulled out from inside the guide slot 106, thus canceling the blocking effect. At this time, the carrier plate 102 is moved upward by the elastic thrust provided by the elastic support member 107 to unfold.

[0047] Additionally, a protective pad is fixedly provided on the side of the lid 101 facing the box body 100. The protective pad can be made of foam or rubber, providing good cushioning protection. A locking element 116 is rotatably provided at the top edge of the lid 101. One end of the locking element 116 extends into the box body 100 and is integrally formed with a fan-shaped plate. The locking element 116 drives the fan-shaped plate to rotate and engage with the arc-shaped groove provided on the inner wall of the box body 100, thus locking the lid 101 at the top of the box body 100. As the locking element 116 rotates, it also drives its bottom fan-shaped plate to rotate into the arc-shaped groove on the inner wall of the box body 100, thereby blocking the lid 101 from rotating upward and opening, thus locking the lid 101 and the box body 100. The lock maintains a stable locking position, and unlocking is as simple as rotating the locking buckle 116, making operation easy and convenient. A handle 117 is fixedly connected to the top of the locking buckle 116. A safety structure is provided between the handle 117 and the top of the lid 101 to limit the rotation of the handle 117. The safety structure includes a convex block 118 and a rod 121. The convex block 118 is fixedly connected to the bottom end of the handle 117 away from the locking buckle 116. A connecting sleeve 119 is movably fitted onto the outer wall of the convex block 118. A second spring 120 is fixed between the connecting sleeve 119 and the convex block 118. The rod 121 is fixedly connected to the side of the connecting sleeve 119 away from the handle 117. The lid 101... A positioning sleeve 122 is fixedly connected at the top and below the insertion rod 121, so that the bottom of the insertion rod 121 is inserted into the positioning sleeve 122 to block and limit the rotation of the handle 117. In order to prevent the handle 117 from being accidentally moved and causing the lock between the lid 101 and the body 100 to be released, a safety structure is set for protection. When the user needs to unlock the lock between the lid 101 and the body 100, he only needs to press the connecting sleeve 119 while holding the handle 117. The connecting sleeve 119 moves towards the handle 117, and at the same time, it moves the insertion rod 121 at the end of the connecting sleeve 119, so that the insertion rod 121 is removed from the positioning sleeve 122. In this way, the handle can be unlocked. 117 can be rotated, so that rotating 117 to the open position can release the lock between the lid 101 and the box body 100, allowing the lid 101 to open and close normally. When the handle 117 is rotated to the locked position, the insertion rod 121 is located above the positioning sleeve 122. When the user releases the grip on the handle 117, the connecting sleeve 119 provides a pushing force through the second spring 120 at the bottom of the convex block 118, causing the insertion rod 121 to move down, so that the end of the insertion rod 121 is inserted into the positioning sleeve 122, restricting the rotation of the handle 117, thus achieving a safety protection function, preventing the handle 117 from being accidentally touched, and enhancing the safety protection mechanism of the lid 101.

[0048] Example 2: Based on Example 1, two carrying structures are symmetrically arranged on the side of the case 100 away from the case cover 101. Each carrying structure includes a shoulder strap 123 and a strap 124. The end of the shoulder strap 123 is fixedly connected to the end of the outer wall of the case 100. A frame 125 is fixedly connected to the end of the shoulder strap 123 away from the case 100. The end of the strap 124 is fixedly connected to the other end of the outer wall of the case 100. The end of the strap 124 away from the case 100 is movably inserted into the frame 125. When the user... When carrying the water pump control box to the work area in remote outdoor areas, the user can carry the box 100 on their back like a backpack by using the shoulder straps 123 and straps 124 in the carrying structure. This not only makes it convenient to carry the box 100 while walking, but also makes it more labor-saving and convenient to carry. In addition, the design of the frame 125 allows the length of the shoulder straps 123 and straps 124 to be adjusted by pulling the length of the exposed part of the straps 124, so as to accommodate users of various heights and make it more adaptable.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A portable water pump control box having a protection function, characterized by, Include: The box (100) is provided with a control assembly in the inner cavity of the box (100), and the port position of the box (100) is provided with a box cover (101) which can be opened and closed by rotating around the side wall of the box (100); The storage structure is arranged in the inner cavity of the box (100), and the inner cavity of the box (100) is positioned and controlled by the storage structure. The storage structure comprises three carrier plates (102) and elastic supporting members (107). The three carrier plates (102) are stacked horizontally from bottom to top. The elastic supporting members (107) are fixed between the carrier plate (102) at the lower position and the bottom of the inner cavity of the box (100). The carrier plate (102) at the middle position is rotatably connected with a linkage rod (104) at the middle of the two sides. The two carrier plates (102) at the upper and lower positions are symmetrically provided with linear sliding grooves (103) on the two side walls. The linkage rod (104) is movably inserted into the linear sliding groove (103) at the corresponding position. The inner walls of the two sides of the box (100) are provided with guide grooves (106). The guide grooves (106) are composed of a rectangular part and an isosceles trapezoidal part connected above the rectangular part. The two ends of the linkage rod (104) are coaxially connected with ball bearings (105). The side wall of the ball bearing (105) extends to the side wall position of the guide groove (106). The carrying structure is arranged on the side of the box (100) away from the box cover (101).

2. The portable water pump control box with a protection function according to claim 1, characterized in that, The storage structure further comprises a foam template (115) fixedly embedded in the recessed groove at the top end of the carrier plate (102). The foam template (115) is provided with a storage groove.

3. The portable water pump control box with a protection function according to claim 1, characterized in that, The carrier plate (102) at the upper position is fixedly connected with a locking shell (108) on both sides. The side of the locking shell (108) close to the inner wall of the box (100) is inserted with a tapered locking tongue (109) which can be extended and retracted. The end of the tapered locking tongue (109) extends to the inner wall top position of the guide groove (106) to limit and lock the position of the carrier plate (102). The locking shell (108) is provided with an unlocking member, so that the unlocking member drives the tapered locking tongue (109) to retract into the locking shell (108) and separate from the guide groove (106) to unlock.

4. The portable water pump control box with a protection function according to claim 3, characterized in that, The unlocking member comprises: A connecting block (110) movably arranged in the locking shell (108). One end of the tapered locking tongue (109) extends into the locking shell (108) and is fixed to the side wall of the connecting block (110). The front top of the connecting block (110) is provided with a sawtooth convex edge (112) protruding outward, and the bottom end of the sawtooth convex edge (112) is sawtooth groove. The side of the connecting block (110) away from the tapered locking tongue (109) is fixedly connected with a first spring (111) between the inner wall of the locking shell (108). A transmission gear (113) is movably connected to the inner wall of the locking shell (108) at the middle part of the transmission gear (113) and is engagedly connected to the sawtooth groove at the bottom end of the sawtooth convex edge (112) at the top of the outer wall of the transmission gear (113). A rack column (114) is engagedly connected to the side wall of the transmission gear (113) at the side wall of the rack column (114), and the rack column (114) extends upward through the top end of the tapered locking tongue (109).

5. The portable water pump control box with protection function according to claim 1, characterized in that, The carrying structure is two and symmetrically arranged on the side of the box body (100) away from the box cover (101), and the carrying structure comprises: A shoulder strap (123) is fixedly connected to the end of the outer wall of the box body (100), and a sun-shaped frame (125) is fixedly connected to the end of the shoulder strap (123) away from the box body (100); A binding strap (124) is fixedly connected to the other end of the outer wall of the box body (100), and the end of the binding strap (124) away from the box body (100) is movably inserted into the sun-shaped frame (125).

6. The portable water pump control box with a protection function according to claim 1, characterized in that, The box cover (101) is fixedly provided with a protective pad on the side facing the box body (100), and a lock catch (116) is rotatably arranged at the top end of the box cover (101), one end of the lock catch (116) extends into the box body (100) and is integrally formed with a sector plate, so that the lock catch (116) drives the sector plate to rotate and is clamped with the arc-shaped groove arranged on the inner wall of the box body (100) to lock the box cover (101) at the top end of the box body (100).

7. The portable water pump control box with a protection function according to claim 6, characterized in that, The top end of the lock catch (116) is fixedly connected with a handle (117), and a safety structure is arranged between the handle (117) and the top end of the box cover (101), which is used to limit the rotation of the handle (117).

8. The portable water pump control box with a protection function according to claim 7, characterized in that, The safety structure comprises: A convex block (118) is fixedly connected to the end of the handle (117) away from the lock catch (116), and a connecting sleeve (119) is movably arranged on the outer wall of the convex block (118), and a second spring (120) is fixedly arranged between the connecting sleeve (119) and the convex block (118); A plug rod (121) is fixedly connected to the side of the connecting sleeve (119) away from the handle (117), and a positioning sleeve (122) is fixedly connected to the top end of the box cover (101) below the plug rod (121), so that the bottom of the plug rod (121) is inserted into the inner side of the positioning sleeve (122) to block and limit the rotation of the handle (117).

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