Temperature control box with temperature regulation function

Abstract

The utility model relates to the technical field of temperature control boxes, and discloses a temperature control box with temperature regulation, which comprises a mounting plate I. The rear side of the top of the mounting plate I is fixedly connected with a mounting plate II, the top of the mounting plate I is provided with a box groove, and the left and right sides of the top of the mounting plate I are rotatably connected with rotating plates. And limiting plates are fixedly connected to the tops of the two rotating plates correspondingly, a box body is clamped in the box groove, first clamping grooves are formed in the adjacent sides of the two limiting plates correspondingly, and clamping blocks are slidably connected to the front ends of the interiors of the two limiting plates correspondingly. According to the utility model, under the mutual cooperation of the mounting plate I, the mounting plate II, the rotating block, the limiting block, the grip I, the clamping groove I, the clamping block, the box groove and the clamping groove II, the box body is convenient to assemble and disassemble, can be directly mounted and fixed without other auxiliary tools, and can be easily taken out when maintenance or position transfer is needed; the dismounting time is shortened, the next step is quickly executed, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature control boxes, in particular to a temperature control box with temperature regulation. Background Art

[0002] A temperature control box, also known as a constant temperature box or a temperature control box, is a device used to control and maintain a specific ambient temperature. With the increase in market demand, the types and functions of temperature control boxes are constantly enriched, and many different types of temperature control boxes have appeared on the market. They are widely used in laboratories, industrial production, food processing, medicine, electronics, agriculture and other fields.

[0003] When using some existing temperature control boxes, first install and fix the temperature control box on a wall, the ground or other equipment, plug in an appropriate power socket and turn on the power switch of the temperature control box, use the control panel or buttons of the temperature control box to set the required temperature to adjust the interior and use it, and when the experiment or work is completed, turn off the power of the temperature control box when it is no longer in use.

[0004] Some existing temperature control boxes are generally installed directly. If their position is changed, the fixed temperature control boxes are difficult to move, and other tools must be used to disassemble and remove them, which also delays daily maintenance or troubleshooting tasks. At the same time, the internal space layout of some existing temperature control boxes cannot be changed. For different types of experiments or storage needs, the fixed position will not provide sufficient adaptability, which may easily lead to insufficient space utilization. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a temperature control box with temperature regulation, aiming to improve the problems in the prior art that it is not easy to load and unload and the internal layout cannot be changed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a temperature control box with temperature adjustment, comprising a mounting plate 1, a mounting plate 2 is fixedly connected to the rear side of the top of the mounting plate 1, the top of the mounting plate 1 is provided with a box slot, the top of the mounting plate 1 is rotatably connected with a rotating plate on the left and right sides, the tops of the two rotating plates are fixedly connected with a limiting plate, a box body is clamped inside the box slot, a clamping slot 1 is opened on adjacent sides of the two limiting plates, a handle 1 is fixedly connected to the top of the box body, the left and right sides of the handle 1 are respectively clamped inside the two clamping slots 1, the left and right sides of the front end of the handle 1 are opened, the front ends of the two limiting plates are slidably connected with a clamping block, the rear sides of the two clamping blocks are fixedly connected with a spring 1, the two springs 1 are respectively fixedly connected to the front ends of the two limiting plates, the two clamping blocks are respectively clamped inside the two clamping slots 2, and a rebound component is arranged between the two rotating plates.

[0007] As a further description of the above technical solution:

[0008] The rebound component includes a spring 2 and a slide plate, wherein the slide plates are provided in two and the spring 2 is provided in multiple. The two slide plates are respectively slidably connected to adjacent sides of two rotating plates, one end of multiple springs 2 are respectively fixedly connected to one side of the two slide plates, and the other ends of multiple springs 2 are respectively fixedly connected to the inner walls of the two rotating plates.

[0009] As a further description of the above technical solution:

[0010] The front end of the box body is rotatably connected to a box door, and a placement plate opposite to each other is arranged inside the box body. Two placement plates are fixedly connected to front and rear sliding blocks opposite to each other on the left and right sides. The left and right sides of the inner wall of the box body are respectively provided with evenly distributed engaging grooves three, and the left and right sides of the inner wall of the box body are respectively provided with front and rear sliding grooves opposite to each other. Multiple engaging grooves three are respectively arranged between two front and rear sliding grooves opposite to each other, and the sliding block is slidably connected to the inside of the sliding groove, and the left and right sides of the bottom of the placement plate are respectively slidably connected to rotating blocks, and the left and right sides of the bottom of the placement plate are respectively fixedly connected to bevel blocks, and the two rotating blocks respectively rest against the bottoms of the two bevel blocks, and one of the rotating blocks is engaged in one of the sliding grooves.

[0011] As a further description of the above technical solution:

[0012] A mesh cover 1 is rotatably connected to the rear side of the box door, a hand groove 2 is opened on the right side of the mesh cover 1, and evenly distributed springs 3 are fixedly connected to the right side of the front end of the placement plate, and a plurality of springs 3 are fixedly connected to the front ends of the springs 3.

[0013] As a further description of the above technical solution:

[0014] A mesh cover 2 is rotatably connected to the middle and rear side of the box body, and a handle 3 is fixedly connected to the right side of the front end of the mesh cover 2.

[0015] As a further description of the above technical solution:

[0016] A switch controller, an operation indicator light and a power indicator light are fixedly connected to the middle and lower side of the box door, a temperature controller and an alarm are fixedly connected to the middle and upper part of the rear side of the box door, a circuit breaker, an AC contactor and a relay are fixedly connected to the middle and upper part of the rear side of the inner wall of the second mounting plate, and a control main board is fixedly connected to the middle and upper parts of the rear side of the inner wall of the second mounting plate.

[0017] As a further description of the above technical solution:

[0018] The temperature controller, switch controller, operation indicator light, power indicator light, circuit breaker, AC contactor, relay, control mainboard and alarm are electrically connected to each other.

[0019] As a further description of the above technical solution:

[0020] The mounting plate 1 is provided with evenly distributed thread grooves 1 on both sides of the middle part, the mounting plate 2 is provided with evenly distributed thread grooves 2 on both sides of the middle part, the handle 1 is provided with a hand groove 1 on the middle part, the left and right sides of the locking groove 2 are beveled and correspond to the two locking blocks, and the tops of the two locking blocks are fixedly connected with the handle 2.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the box body is conveniently loaded and unloaded through the cooperation of the mounting plate 1, the mounting plate 2, the rotating block, the limiting block, the handle 1, the engaging groove 1, the engaging block, the box groove and the engaging groove 2. The box body can be directly installed and fixed without the aid of other auxiliary tools. It can be easily taken out when maintenance or relocation is required, which reduces the disassembly time and allows quick access to the next step, thereby improving work efficiency.

[0023] 2. In the utility model, the adjustment of the internal space of the box is achieved through the cooperation of the box door, the placement plate, the locking groove, the slide groove, the bevel block, the rotating block and the slider. The user can adjust the layout of the internal space according to the size, shape and quantity of the placed items to ensure that the placed items are reasonably placed and avoid uneven internal temperature caused by space waste or crowding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional schematic diagram of a temperature control box with temperature adjustment proposed by the utility model;

[0025] Figure 2 This is a structural schematic diagram of a mounting plate 1 of a temperature control box with temperature regulation proposed by the utility model;

[0026] Figure 3 This is a schematic structural diagram of a limit plate of a temperature control box with temperature regulation proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of a temperature control box with temperature regulation proposed by the utility model;

[0028] Figure 5 This is a structural schematic diagram of a placement plate of a temperature control box with temperature adjustment proposed by the utility model;

[0029] Figure 6 This is a structural schematic diagram of a mesh cover 1 of a temperature control box with temperature regulation proposed by the utility model;

[0030] Figure 7 The utility model is a schematic structural diagram of a mesh cover 2 of a temperature control box with temperature regulation.

[0031] Legend:

[0032] 1. Mounting plate 1; 2. Mounting plate 2; 3. Rotating plate; 4. Limiting plate; 5. Box; 6. Handle 1; 7. Clamping slot 1; 8. Clamping block; 9. Spring 1; 10. Handle 2; 11. Slide plate; 12. Spring 2; 13. Box slot; 14. Threaded slot 1; 15. Threaded slot 2; 16. Clamping slot 2; 17. Hand slot 1; 18. Box door; 19. Placement plate; 20. Clamping slot 3; 21. Slide Slot; 22. Bevel block; 23. Rotating block; 24. Spring three; 25. Rebound plate; 26. Slider; 27. Net cover one; 28. Hand slot two; 29. ​​Net cover two; 30. Handle three; 31. Temperature controller; 32. Switch controller; 33. Operation indicator light; 34. Power indicator light; 35. Circuit breaker; 36. AC contactor; 37. Relay; 38. Control main board; 39. Alarm. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Reference Figure 1 - Figure 3 The utility model provides an embodiment: a temperature control box with temperature adjustment, including a mounting plate 1, a mounting plate 2 is fixedly connected to the rear side of the top of the mounting plate 1, a box slot 13 is opened on the top of the mounting plate 1, a rotating plate 3 is rotatably connected to the left and right sides of the top of the mounting plate 1, and the tops of the two rotating plates 3 are fixedly connected to the limit plates 4, a box body 5 is clamped inside the box slot 13, and the adjacent sides of the two limit plates 4 are each provided with a clamping slot 7, a handle 6 is fixedly connected to the top of the box body 5, and the left and right sides of the handle 6 are respectively clamped inside the two clamping slots 7, and the handle A locking groove 16 is provided on both sides of the front end of the handle 6, a locking block 8 is slidably connected to the front end of the two limit plates 4, and a spring 9 is fixedly connected to the rear side of the two locking blocks 8. The two springs 9 are respectively fixedly connected to the front end of the two limit plates 4, and the two locking blocks 8 are respectively locked in the two locking grooves 16. A rebound component is provided between the two rotating plates 3. A hand groove 17 is provided in the middle of the handle 6, and the left and right sides of the locking groove 16 are beveled and correspond to the two locking blocks 8. The tops of the two locking blocks 8 are fixedly connected to the handles 10.

[0035] Snap the bottom of the box body 5 into the box groove 13, and then rotate the two rotating plates 3 in opposite directions on the top of the mounting plate 1 and approach each other. At the same time, the two rotating plates 3 will approach and abut against the two sides of the box body 5. At this time, the two limit plates 4 will also abut against the top of the box body 5, and the two snap-fitting grooves 17 will snap into the left and right sides of the handle 16 respectively. When the two snap-fitting grooves 17 are snapped into the two sides of the handle 16, the adjacent sides of the two snap-fitting blocks 8 are squeezed by the oblique edges on both sides of the snap-fitting groove 16 and slide into the limit plate 4 and squeeze the two springs 19 until the two snap-fitting grooves 16 are snapped into the two sides of the handle 16. When the second engagement groove 16 is located at the rear side of the two engaging blocks 8, the two springs 19 will rebound and reset and push the two engaging blocks 8 backwards and engage them in the two engaging grooves 16 respectively, completing the installation of the box body 5. When it needs to be taken out, hold the two handles 2 10 and pull forward. At this time, the two engaging blocks 8 will slide forward into the limit plate 4 respectively and squeeze the two springs 19. At the same time, the two engaging blocks 8 will leave the two engaged engaging grooves 16 respectively, and then the two rotating plates 3 are rotated in opposite directions away from the two sides of the box body 5. At this time, hold the hand groove 17 to take out the box body 5.

[0036] Reference Figure 2 and Figure 3 The rebound component includes a spring 12 and a slide plate 11. The slide plates 11 are set to two, and the spring 12 is set to multiple. The two slide plates 11 are respectively slidably connected to the adjacent sides of the two rotating plates 3. One ends of the multiple springs 12 are respectively fixedly connected to one side of the two slide plates 11, and the other ends of the multiple springs 12 are respectively fixedly connected to the inner walls of the two rotating plates 3.

[0037] When the two rotating plates 3 contact the two sides of the box body 5, the two slide plates 11 will be squeezed by the two sides of the box body 5 to slide into the rotating plates 3 and squeeze the multiple springs 12. When the box body 5 needs to be taken out, the multiple springs 12 will rebound the two slide plates 11, and push the two rotating plates 3 out in opposite directions and away from the box body 5.

[0038] Reference Figure 4 , Figure 5 and Figure 7 The front end of the box body 5 is rotatably connected with a box door 18, and a placement plate 19 opposite to each other is arranged inside the box body 5. The left and right sides of the two placement plates 19 are fixedly connected with sliders 26 opposite to each other. The left and right sides of the inner wall of the box body 5 are respectively provided with evenly distributed engaging grooves 20, and the left and right sides of the inner wall of the box body 5 are respectively provided with front and rear opposite slide grooves 21. Multiple engaging grooves 3 20 are respectively arranged between two front and rear opposite slide grooves 21, and the slider 26 is slidably connected inside the slide groove 21. The left and right sides of the bottom of the placement plate 19 are respectively slidably connected with rotating blocks 23, and the left and right sides of the bottom of the placement plate 19 are respectively fixedly connected with bevel blocks 22, and the two rotating blocks 23 are respectively against the bottom of the two bevel blocks 22, and one of the rotating blocks 23 is engaged in one of the slide grooves 21.

[0039] By pulling the handle on the right front end of the box door 18 forward, the box door 18 is rotated to open and the internal situation of the box body 5 is displayed. When the internal space layout needs to be adjusted, one of the placement plates 19 is moved upward. At this time, multiple sliders 26 will slide upward in multiple slide grooves 21 respectively, and at the same time, the two rotating blocks 23 will respectively leave the two engaging grooves 3 20 engaged at this position. At this time, the placement plate 19 is moved up and down again and after selecting the required position, the two rotating blocks 23 are respectively rotated in the opposite direction away from and aligned with the two engaging grooves 3 20 at the current position, and then the placement plate 19 is slightly downward. At this time, the two rotating blocks 23 will respectively engage in the two engaging grooves 3 20 at the current position and respectively rest against the bottom of the two bevel blocks 22, completing the change of the upper and lower positions of the placement plate 19, or when the two rotating blocks 23 leave the two engaging grooves 3 20 engaged in the current position, the placement plate 19 can be rotated and tilted, and the sliders 26 on both sides are respectively disengaged from the multiple slide grooves 21, and the placement plate 19 can be taken out.

[0040] Reference Figure 4 , Figure 6 and Figure 7 The rear side of the box door 18 is rotatably connected with a net cover 1 27, and a hand groove 28 is provided on the right side of the net cover 1 27. The right side of the front end of the placement plate 19 is fixedly connected with a uniformly distributed spring 3 24, and the front ends of the multiple springs 3 24 are fixedly connected with a rebound plate 25. The middle and rear side of the box body 5 is rotatably connected with a net cover 29, and the right side of the front end of the net cover 29 is fixedly connected with a handle 30. The middle and lower side of the box door 18 is fixedly connected with a switch controller 32, an operation indicator light 33 and a power indicator light 34. The middle and upper part of the rear side of the box door 18 is fixedly connected with a temperature controller 31 and an alarm 39. The middle and upper part of the rear side of the inner wall of the mounting plate 22 is fixedly connected with a circuit breaker 35, an AC contactor 36 and a relay 37. The middle and upper parts of the rear side of the inner wall of the mounting plate 22 are fixedly connected with a control mainboard 38. The temperature controller 31, the switch controller 32, the operation indicator light 33, the power indicator light 34, the circuit breaker 35, the AC contactor 36, the relay 37, the control mainboard 38 and the alarm 39 are electrically connected to each other.

[0041] When the box door 18 is rotated and closed, the rear side of the mesh cover 27 will press against the two rebound plates 25 and squeeze multiple springs 3 24 to prevent the mesh cover 27 from being bumped and affecting the internal temperature controller 31, switch controller 32, operation indicator light 33, power indicator light 34 and alarm 39 and provide buffering. The hand slot 28 is used to facilitate the mesh cover 27 to be rotated open and display these components. When the mesh cover 27 is rotated and closed, these components can also be protected. The temperature controller 31, switch controller 32, operation indicator light 33, power indicator light 34, circuit breaker 35, AC contactor 36, relay 37, control main board 38 and alarm 39 are electrically connected to each other. When needed, it is turned on by the switch controller 32 and the power is observed through the power indicator light 34 Whether it is connected, check whether it is running by observing the operation indicator light 33, protect the circuit through the circuit breaker 35 and ensure that it is automatically disconnected when the current is too large for protection, set the required temperature in advance through the temperature controller 31 and send the command to the AC contactor 36 and the relay 37 through the control main board 38 to control the power supply and operation start of the heating element or the cooling element. When the temperature exceeds the set range, the control main board 38 sends the command to the alarm 39 and sounds an alarm to remind, when the placement plate 19 is taken out, hold the handle three 30 and pull it forward to make the mesh cover two 29 rotate open, displaying the circuit breaker 35, AC contactor 36, relay 37 and control main board 38, which is convenient for maintenance, and these components can also be protected when the mesh cover two 29 is rotated closed.

[0042] Reference Figure 1 and Figure 2 The left and right sides of the middle of the mounting plate 1 are respectively provided with evenly distributed thread grooves 14, and the left and right sides of the middle of the mounting plate 2 are respectively provided with evenly distributed thread grooves 15.

[0043] The mounting plate 1 can be mounted on the ground or other equipment through a plurality of thread grooves 14, and the mounting plate 2 can be mounted on the wall or other equipment through a plurality of thread grooves 15. The positions can be selected arbitrarily according to the needs.

[0044] Working principle: when in use, first snap the box body 5 into the box slot 13, then rotate the two rotating plates 3 in opposite directions and approach the two sides of the box body 5, at this time, the two limit plates 4 will also approach each other and approach the top of the box body 5, when the two limit plates 4 approach each other, they will be snapped on the left and right sides of the handle 6 through the two snapping slots 1 7, at the same time, the two snapping blocks 8 are squeezed by the two side bevels of the snapping slot 2 16 and slide into the limit plates 4, and then the two springs 1 9 rebound to push the two snapping blocks 8 out again and snap into the two snapping slots 2 16, to complete the installation of the box body 5 and stabilize it, rotate the box door 18 to open and display the interior of the box body 5, move one of the placement plates 19 upwards, at this time, multiple sliders 26 will slide upwards in multiple slide slots 21 respectively, and at the same time, the two The rotating block 23 will also move upward and leave the two engaging grooves three 20 at the current position and form a 90 degree angle with the placement plate 19 vertically downward according to gravity. The placement plate 19 will then be moved up and down and stop after selecting the required position. The two rotating blocks 23 will be rotated and aligned with the two engaging grooves three 20 at the current position. The placement plate 19 will then be slightly downward so that the two rotating blocks 23 will be engaged with the two engaging grooves three 20 at the current position and rest against the bottom of the two bevel blocks 22. The position change of the placement plate 19 will be completed and the placement plate 19 will stop. When the box body 5 needs to be taken out, the two engaging blocks 8 will be driven by the two handles two 10 to slide forward respectively to squeeze the two springs one 9 and leave the two engaging grooves two 16 to release the engaging relationship. The two rotating plates 3 will then be rotated in opposite directions away from the two sides of the box body 5. The box body 5 can be taken out by holding the hand groove one 17.

[0045] Finally, it should be noted that the above 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 aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature control box with temperature regulation, comprising a mounting plate (1), characterized in that: The rear side of the top of the mounting plate 1 (1) is fixedly connected to the mounting plate 2 (2), the top of the mounting plate 1 (1) is provided with a box groove (13), the left and right sides of the top of the mounting plate 1 (1) are rotatably connected to rotating plates (3), the tops of the two rotating plates (3) are fixedly connected to limit plates (4), the box groove (13) is internally engaged with a box body (5), the adjacent sides of the two limit plates (4) are provided with a locking groove 1 (7), the top of the box body (5) is fixedly connected to a handle 1 (6), and the left and right sides of the handle 1 (6) are fixedly connected to the handle 1 (6). The two sides are respectively engaged in the two engaging grooves (7), the left and right sides of the front end of the handle (6) are provided with engaging grooves (16), the front ends of the two limit plates (4) are slidably connected with engaging blocks (8), the rear sides of the two engaging blocks (8) are fixedly connected with springs (9), the two springs (9) are respectively fixedly connected to the front ends of the two limit plates (4), the two engaging blocks (8) are respectively engaged in the two engaging grooves (16), and a rebound component is arranged between the two rotating plates (3).

2. A temperature control box with temperature regulation according to claim 1, characterized in that: The rebound component comprises a spring 2 (12) and a slide plate (11), wherein the slide plates (11) are provided in two numbers, and the spring 2 (12) is provided in a plurality, the two slide plates (11) are respectively slidably connected to adjacent sides of two rotating plates (3), one end of the plurality of springs 2 (12) is respectively fixedly connected to one side of the two slide plates (11), and the other end of the plurality of springs 2 (12) is respectively fixedly connected to the inner walls of the two rotating plates (3).

3. A temperature control box with temperature regulation according to claim 1, characterized in that: The front end of the box body (5) is rotatably connected with a box door (18), and a placement plate (19) opposite to each other is arranged inside the box body (5). The left and right sides of the two placement plates (19) are fixedly connected with sliders (26) opposite to each other in front and back. The left and right sides of the inner wall of the box body (5) are respectively provided with evenly distributed engaging grooves (20), and the left and right sides of the inner wall of the box body (5) are respectively provided with slide grooves (21) opposite to each other in front and back. A plurality of the engaging grooves (20) are respectively arranged between two slide grooves (21) opposite to each other in front and back. The sliders (26) are slidably connected inside the slide grooves (21), and the left and right sides of the bottom of the placement plate (19) are respectively slidably connected with rotating blocks (23), and the left and right sides of the bottom of the placement plate (19) are respectively fixedly connected with bevel blocks (22), and the two rotating blocks (23) are respectively against the bottoms of the two bevel blocks (22), and one of the rotating blocks (23) is engaged inside one of the slide grooves (21).

4. A temperature control box with temperature regulation according to claim 3, characterized in that: The rear side of the box door (18) is rotatably connected to a mesh cover (27), and a hand groove (28) is provided on the right side of the mesh cover (27). The right side of the front end of the placement plate (19) is fixedly connected to springs (24) that are evenly distributed, and a plurality of springs (24) are fixedly connected to the front ends of the springs (24) to rebound plates (25).

5. A temperature control box with temperature regulation according to claim 1, characterized in that: A second mesh cover (29) is rotatably connected to the middle and rear side of the box body (5), and a third handle (30) is fixedly connected to the right side of the front end of the second mesh cover (29).

6. A temperature control box with temperature regulation according to claim 3, characterized in that: A switch controller (32), an operation indicator light (33) and a power indicator light (34) are fixedly connected to the middle and lower side of the box door (18); a temperature controller (31) and an alarm (39) are fixedly connected to the middle and upper part of the rear side of the box door (18); a circuit breaker (35), an AC contactor (36) and a relay (37) are fixedly connected to the middle and upper part of the rear side of the inner wall of the second mounting plate (2); and a control main board (38) is fixedly connected to the middle and upper parts of the rear side of the inner wall of the second mounting plate (2).

7. A temperature control box with temperature regulation according to claim 6, characterized in that: The temperature controller (31), the switch controller (32), the operation indicator light (33), the power indicator light (34), the circuit breaker (35), the AC contactor (36), the relay (37), the control main board (38) and the alarm (39) are electrically connected to each other.

8. The temperature control box with temperature regulation according to claim 1, characterized in that: The mounting plate 1 (1) is provided with evenly distributed thread grooves 1 (14) on both sides of the middle part, the mounting plate 2 (2) is provided with evenly distributed thread grooves 2 (15) on both sides of the middle part, the handle 1 (6) is provided with a hand groove 1 (17) on the middle part, the engaging groove 2 (16) is beveled on both sides and corresponds to the two engaging blocks (8), and the tops of the two engaging blocks (8) are fixedly connected with the handle 2 (10).

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