Temperature and humidity sensor

Abstract

The invention relates to the technical field of temperature sensors, and particularly discloses a temperature and humidity sensor which comprises a shell body, a circuit board is arranged in the shell body, a data line is welded to one side of the circuit board, and chip pins, resistors, capacitors and welding spots of leads on the circuit board are completely covered with silicone rubber blocks. The waterproof breathable film is installed at the front section of the shell body, the PCB covered with the silicone rubber block is installed in the shell, the rear end of the shell is sealed through the sealing gasket, then resin is filled, and the LED lamp can be normally used for a long time in the environment with the humidity of 90% or above, so that the innovative scheme effectively prevents high-concentration water vapor from corroding and interfering chips and components, and the service life of the LED lamp is prolonged. The reliability and the service life of the sensor are remarkably improved, the reliability and the stability can be shown no matter in a humid environment such as a refrigerator and a cold storage or in other application scenes with strict requirements on temperature and humidity monitoring, and powerful support is provided for temperature and humidity management of a user.

Description

Technical Field

[0001] The invention relates to the technical field of temperature sensors, in particular to a temperature and humidity sensor. Background Art

[0002] There are many types of temperature sensors, which can be divided into contact and non-contact types according to the measurement method, and can be divided into thermal resistors, thermocouples, etc. according to the characteristics of materials and electronic components. Among them, thermocouples measure temperature based on the relationship between the thermoelectric potential and temperature generated in a closed loop composed of two different metals, while thermal resistors measure temperature by using the property that the resistance value of metals or semiconductors changes with temperature. With the leap of semiconductor technology, innovative products such as semiconductor thermocouple sensors and PN junction temperature sensors have emerged, which are currently used in many smart home appliances such as refrigerators, air conditioners, dryers, washing machines, etc.

[0003] For example, a Chinese patent with announcement number CN213514633U discloses a temperature and humidity sensor for a refrigerator, including a probe, a data processing device connected to a wall panel by a connecting line, and a back panel, wherein a fixing mechanism is provided on one side of the back panel, and the fixing mechanism includes a first clamping block, which is symmetrically arranged on one side surface of the back panel, a second clamping block engaged with the first clamping block is provided at the rear end of the data processing device, a first fixing block and a supporting block are fixedly installed on one side of the back panel, a pressure plate for limiting the second clamping block is provided on the top of the supporting block, a sleeve is provided on one side of the top of the pressure plate, a clamping bolt for clamping the pressure plate is threaded through the top of the first fixing block, and the clamping bolt is sleeved and connected with the sleeve.

[0004] The above-mentioned public patent solves the problem that it is inconvenient to fix the existing temperature and humidity sensor probe to the inner box of the refrigerator, but the existing temperature and humidity sensors still have some defects that need to be improved. Most of the temperature and humidity sensors on the market currently adopt a structure of a shell with a PCB board. This design is very easy to fail in extreme environments where the humidity exceeds 90%, making the sensor easily affected by moisture and damaged, and unable to guarantee continuous and stable performance and working conditions; in addition, the existing temperature and humidity sensors usually rely on mechanical firmware such as bolts for installation, which not only increases the complexity of installation, but also brings the problem of difficulty in disassembly in subsequent maintenance work, which is not conducive to convenient maintenance and management of the equipment. Summary of the invention

[0005] The object of the present invention is to provide a temperature and humidity sensor to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides a temperature and humidity sensor, including a shell body, a circuit board is provided inside the shell body, a data line is welded on one side of the circuit board, a silicone rubber block is provided on one side of the circuit board and the data line, a packaging board is connected to one side of the shell body, a waterproof breathable membrane is fixedly connected to one side of the packaging board, a sealing gasket is fixedly connected to the side of the shell body away from the waterproof breathable membrane, one side of the data line passes through the sealing gasket, a mounting ring is fixedly connected to the shell body between the waterproof breathable membrane and the sealing gasket, a first fixing mechanism is provided between the mounting ring and the packaging board, a limiting mechanism is provided on one side of the first fixing mechanism, a mounting block is fixedly connected to the side of the shell body away from the mounting ring, a mounting plate is provided below the mounting block, and a second fixing mechanism is provided between the mounting block and the mounting plate.

[0007] Furthermore, the first fixing mechanism includes a socket, which is opened inside the mounting ring, and a rod is inserted into the socket, and a first positioning hole is opened inside the rod, and four first positioning holes are opened, and a first positioning rod is inserted into the first positioning hole, and first driving components are provided on both sides of the mounting ring, and the first positioning rod is movably connected to the first positioning hole through the first driving component.

[0008] Furthermore, the first driving assembly includes a first square groove, which is opened inside the mounting ring, a first screw rod is rotatably connected inside the first square groove, a first torsion block is fixedly connected to the top end of the first screw rod, the first positioning rod is threadedly connected to the first screw rod, and one side of the first positioning rod is slidably connected to the first square groove.

[0009] Furthermore, both sides of the first square groove are provided with limiting grooves, the limiting grooves are slidably connected to limiting blocks, and one side of the limiting block is fixedly connected to one side of the first positioning rod.

[0010] Furthermore, the limiting mechanism includes a through hole, which is opened inside the first torsion block, and a limiting bending rod is inserted into the through hole. The end of the limiting bending rod is fixedly connected to a pulling block, and one side of the pulling block is embedded and slidable in the mounting ring.

[0011] Furthermore, a slide groove is provided inside the mounting ring, a slider is slidably connected inside the slide groove, the slider is fixedly connected to the bottom end of the pull block, an embedding groove is provided on one side inside the slide groove, an embedding block is slidably connected inside the embedding groove, and the embedding block is fixedly connected to the slider.

[0012] Furthermore, a docking block is fixedly connected to one side of the packaging plate close to the shell body, a docking groove is provided on one side of the shell body close to the packaging plate, and the docking block is movably connected to the docking groove.

[0013] Furthermore, the second fixing mechanism includes a connecting groove, which is opened on both sides of the bottom end of the mounting block, a connecting block is inserted into the interior of the connecting groove, the connecting block is fixedly connected to the mounting plate, a second positioning hole is opened in the interior of the connecting block, a second positioning rod is inserted into the interior of the second positioning hole, second driving components are provided on both sides of the mounting block, and the second positioning rod is movably connected to the second positioning hole through the second driving component.

[0014] Furthermore, the second driving assembly includes a second torsion block, the second torsion block is rotatably connected to one side of the mounting block, the second torsion block extends into a side of the mounting block and is fixedly connected to a first bevel gear, one side of the first bevel gear is meshingly connected to a second bevel gear, one side of the second bevel gear is fixedly connected to a second screw rod, a second square groove is opened inside the mounting block, the second screw rod is rotatably connected to the inside of the second square groove, and one side of the second positioning rod is slidably connected to the second square groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] Firstly, in the present invention, the chip pins, resistors, capacitors and solder joints of the leads on the circuit board are all covered with silicone rubber blocks, and a waterproof breathable membrane is installed at the front section of the shell body. The PCB board covered with silicone rubber blocks is installed into the shell, the rear end of the shell is sealed with a sealing gasket, and then resin is poured. It can be used normally for a long time in an environment with a humidity of more than 90%. This innovative solution not only effectively prevents the corrosion and interference of high-concentration water vapor to chips and components, but also significantly improves the reliability and service life of the sensor. Whether in humid environments such as refrigerators and cold storages, or in other application scenarios with strict requirements for temperature and humidity monitoring, it can show reliable stability and provide strong support for users' temperature and humidity management.

[0017] Secondly, in the present invention, the waterproof breathable membrane is installed on the packaging plate, and the packaging plate is fixed to the shell body by the first fixing mechanism, so as to ensure that the waterproof breathable membrane is reliably and stably installed on the temperature and humidity sensor, and prevent the waterproof breathable membrane from falling off the temperature and humidity sensor. In addition, the design is also convenient for the subsequent replacement of the waterproof breathable membrane. Through the setting of the limiting mechanism, the first torsion block in the first fixing mechanism can be effectively prevented from loosening, and the long-term operation can also ensure that the first torsion block maintains its initial tightening state, thereby further consolidating the stability of the waterproof breathable membrane and the sensor as a whole, and effectively avoiding the risk of the waterproof breathable membrane falling off due to vibration or external force.

[0018] Thirdly, in the present invention, a mounting block, a second fixing mechanism and a mounting plate are provided, the mounting block is fixed on the temperature and humidity sensor, the mounting plate is pre-fixed on the mounting object, and then the two are connected by using the second fixing mechanism, and no bolts are needed for fixing. By adopting a design that is easier to install and disassemble, the deployment and maintenance of the temperature and humidity sensor can be made faster and simpler, and the complexity of operation is reduced, which not only improves work efficiency, but also reduces the risk of equipment damage caused by improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure inside the installation block in the present invention;

[0021] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0022] Figure 4 It is a schematic diagram of the packaging board structure in the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of one side of the shell body in the present invention;

[0024] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at B;

[0025] Figure 7 It is a schematic diagram of the cross-sectional structure of one side of the housing body in the present invention;

[0026] Figure 8 For the present invention Figure 7 Enlarged structural diagram at C.

[0027] In the figure: 1, shell body; 2, circuit board; 3, data line; 4, silicone rubber block; 5, waterproof breathable membrane; 6, packaging board; 7, first fixing mechanism; 71, plug rod; 72, plug hole; 73, first positioning hole; 74, first positioning rod; 75, first driving assembly; 751, first screw rod; 752, first twist block; 753, first square groove; 754, limit groove; 755, limit block; 8, docking block; 9, docking groove; 10, mounting ring; 11, limit mechanism; 111, pull block; 112 , limit bending rod; 113, through hole; 114, slider; 115, slide groove; 116, embedded block; 117, embedded groove; 12, sealing gasket; 13, mounting block; 14, mounting plate; 15, second fixing mechanism; 151, connecting groove; 152, connecting block; 153, second positioning hole; 154, second positioning rod; 155, second driving assembly; 1551, second torsion block; 1552, first bevel gear; 1553, second bevel gear; 1554, second screw rod; 1555, second square groove. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-Figure 8In an embodiment of the present invention, a temperature and humidity sensor includes a shell body 1, a circuit board 2 is provided inside the shell body 1, a data line 3 is welded on one side of the circuit board 2, a silicone rubber block 4 is provided on one side of the circuit board 2 and the data line 3, a packaging board 6 is connected to one side of the shell body 1, a waterproof breathable membrane 5 is fixedly connected to one side of the packaging board 6, the waterproof breathable membrane 5 is usually made of microporous materials such as polytetrafluoroethylene and high molecular polyethylene, these materials have a special microporous structure, the waterproof breathable membrane 5 can allow gas molecules smaller than its pore size, such as air, to pass through, while preventing substances larger than the pore size, such as water droplets and dust from penetrating, a sealing pad 12 is fixedly connected to the side of the shell body 1 away from the waterproof breathable membrane 5, one side of the data line 3 passes through the sealing pad 12, a mounting ring 10 is fixedly connected to the shell body 1 between the waterproof breathable membrane 5 and the sealing pad 12, a first fixing mechanism 7 is provided between the mounting ring 10 and the packaging board 6, the first fixing mechanism 7 A limiting mechanism 11 is provided on one side, and a mounting block 13 is fixedly connected to the side of the shell body 1 away from the mounting ring 10. A mounting plate 14 is provided below the mounting block 13, and the mounting plate 14 is connected and fixed to the mounting object by bolts. A second fixing mechanism 15 is provided between the mounting block 13 and the mounting plate 14. By improving the structure of the temperature and humidity sensor, its stability in extreme environments with humidity exceeding 90% can be ensured, which can ensure that the sensor can still work normally under these conditions and is not affected by humidity. This is crucial for occasions requiring high-precision temperature and humidity monitoring. By adopting a design that is easier to install and disassemble, the deployment and maintenance of the sensor can be faster and simpler, and the complexity of operation is reduced. This not only improves work efficiency, but also reduces the risk of equipment damage caused by improper operation. In addition to this circuit scheme, the sealing gasket 12 at the rear end can also be cancelled, and the potting uses a resin with extremely low fluidity. While reducing costs, it can also achieve long-term normal use in an environment with a humidity of more than 90%.

[0030] See also Figure 1 , 4 , Figure 8The first fixing mechanism 7 includes a socket 72, and the socket 72 is provided inside the mounting ring 10. A plug rod 71 is inserted inside the socket 72. A first positioning hole 73 is provided inside the plug rod 71, and four first positioning holes 73 are provided. A first positioning rod 74 is inserted inside the first positioning hole 73. First driving components 75 are provided on both sides of the mounting ring 10. The first positioning rod 74 is movably connected to the first positioning hole 73 through the first driving component 75. The first driving component 75 includes a first square groove 753. The first square groove The first square groove 753 is provided inside the mounting ring 10, the first screw rod 751 is rotatably connected inside the first square groove 753, the top of the first screw rod 751 is fixedly connected to the first torsion block 752, the first positioning rod 74 is threadedly connected to the first screw rod 751, one side of the first positioning rod 74 is slidably connected to the first square groove 753, both sides of the first square groove 753 are provided with limiting grooves 754, the limiting grooves 754 are slidably connected to the limiting blocks 755, and one side of the limiting blocks 755 is fixedly connected to one side of the first positioning rod 74; By setting the first fixing mechanism 7, the first driving assembly 75 is used to drive the first positioning rod 74 to move, so that the first positioning rod 74 is moved and inserted into the first positioning hole 73. At this time, the insertion rod 71 is fixed with the insertion hole 72. The four insertion rods 71 ​​cooperate with the insertion hole 72 to effectively prevent the packaging plate 6 with the waterproof and breathable membrane 5 from falling from the shell body 1, so as to avoid affecting the sealing of the entire device. In addition, when the packaging plate 6 needs to be removed, the first driving assembly 75 is used to make the first positioning rod 74 leave the first positioning hole 73. At this time, the insertion rod 71 is no longer fixed with the insertion hole 72, and the sealing of the whole device can be completed. The disassembly work is simple and convenient for maintenance, and the disassembly and assembly efficiency is improved. By setting the first driving component 75, the first torsion block 752 is rotated, and the first torsion block 752 provides power for the rotation of the first screw rod 751, so that the first screw rod 751 rotates in the first square groove 753, thereby providing power for the first positioning rod 74 to move at the first positioning hole 73, thereby achieving the purpose of disassembly and fixation. By setting the limit groove 754 and the limit block 755, the moving position of the first positioning rod 74 can be limited, and it is ensured that the first positioning rod 74 moves more smoothly, thereby facilitating the disassembly and assembly of the packaging plate 6.

[0031] See also Figure 5-6The limiting mechanism 11 includes a through hole 113, which is provided inside the first torsion block 752. A limiting bent rod 112 is inserted inside the through hole 113. A pull block 111 is fixedly connected to the end of the limiting bent rod 112. One side of the pull block 111 is embedded and slidably arranged in the mounting ring 10. A slide groove 115 is provided inside the mounting ring 10. A slider 114 is slidably connected inside the slide groove 115. The slider 114 is fixedly connected to the bottom end of the pull block 111. An embedding groove 117 is provided on one side of the slide groove 115. An embedding block 116 is slidably connected inside the embedding groove 117. The embedding block 116 is fixedly connected to the slider 114. By setting the limiting mechanism 11, when the first torsion block 752 is engaged, the limiting mechanism 111 is provided with a through hole 113. After a positioning rod 74 is connected and fixed to the first positioning hole 73, the pull block 111 is pushed, and the pull block 111 drives the limiting bent rod 112 to move, so that the limiting bent rod 112 is inserted into the through hole 113 of the first twist block 752, so that the first twist block 752 cannot rotate, thereby ensuring that the first positioning rod 74 is stably connected to the first positioning hole 73, preventing the packaging plate 6 from falling, and providing protection for the installation of the waterproof breathable membrane 5. By setting the slide groove 115 and the slider 114, the pull block 111 can slide on the mounting ring 10, and the embedding block 116 and the embedding groove 117 are set to prevent the slider 114 from sliding out of the slide groove 115, so that the limiting bent rod 112 cannot fall from the mounting ring 10. The integrated design can prevent the limiting bent rod 112 from being lost.

[0032] See also Figure 5-6 A docking block 8 is fixedly connected to one side of the packaging plate 6 close to the shell body 1, and a docking groove 9 is opened on one side of the shell body 1 close to the packaging plate 6, and the docking block 8 is movably connected to the docking groove 9; by setting the docking block 8 and the docking groove 9, the packaging plate 6 is tightly and reliably connected to the shell body 1, thereby improving the structural stability of the connection.

[0033] See also Figure 1-3The second fixing mechanism 15 includes a connecting groove 151, which is provided on both sides of the bottom end of the mounting block 13, a connecting block 152 is inserted into the connecting groove 151, and the connecting block 152 is fixedly connected to the mounting plate 14, a second positioning hole 153 is provided in the connecting block 152, and a second positioning rod 154 is inserted into the second positioning hole 153, and a second driving assembly 155 is provided on both sides of the mounting block 13, and the second positioning rod 154 is connected to the second positioning rod 154 through the second driving assembly 155. The second drive assembly 155 includes a second torsion block 1551, which is rotatably connected to one side of the mounting block 13. The second torsion block 1551 extends into one side of the mounting block 13 and is fixedly connected to a first bevel gear 1552. One side of the first bevel gear 1552 is meshedly connected to a second bevel gear 1553. One side of the second bevel gear 1553 is fixedly connected to a second screw rod 1554. A second square groove 1555 is provided inside the mounting block 13. The second screw rod 1554 is rotatably connected to the mounting block 13. The second positioning rod 154 is movably connected to the inside of the second square groove 1555, and one side of the second positioning rod 154 is slidably connected to the second square groove 1555; by setting the second fixing mechanism 15, the connecting block 152 is inserted into the connecting groove 151, so that the mounting block 13 is connected to the mounting plate 14, and then the second driving component 155 is used to drive the second positioning rod 154 to move, so that the second positioning rod 154 is inserted into the second positioning hole 153, so that the connecting block 152 is fixed to the connecting groove 151, so that the mounting block 13 is connected and fixed to the mounting plate 14, and the temperature and humidity can be achieved. Sensor installation work, this design does not need to remove the mounting plate 14 from the mounting object when disassembling the temperature and humidity sensor. By setting the second driving assembly 155, the second torsion block 1551 is rotated, and the second torsion block 1551 drives the first bevel gear 1552 to rotate, and the first bevel gear 1552 drives the second bevel gear 1553 to rotate, and the second bevel gear 1553 drives the second screw rod 1554 to rotate in the second square groove 1555, thereby providing power for the second positioning rod 154 to move at the second positioning hole 153, thereby achieving the purpose of disassembly and fixation.

[0034] The working principle of the present invention is: by using the silicone rubber block 4 to cover all the chip pins, resistors, capacitors and solder joints of the leads on the circuit board 2, and installing a waterproof breathable membrane 5 at the front section of the shell body 1, the PCB board covered with the silicone rubber block 4 is installed into the shell, the rear end of the shell is sealed with a sealing gasket 12, and then resin is poured. It can be used normally for a long time in an environment with a humidity of more than 90%. This innovative solution not only effectively prevents the corrosion and interference of high-concentration water vapor on chips and components, but also significantly improves the reliability and service life of the sensor. Whether in a humid environment such as a refrigerator or a cold storage, or in other application scenarios with strict requirements for temperature and humidity monitoring, it can show reliable stability. The packaging board 6 is aligned with the shell body 1, and the docking block 8 is inserted into the docking groove 9 to complete the docking. The first torsion block 752 is rotated, and the first torsion block 752 provides power for the rotation of the first screw rod 751, so that the first screw rod 751 rotates in the first square groove 753, so that the first positioning rod 74 moves and is inserted into the first positioning hole 73. When the first positioning rod 74 is connected and fixed to the first positioning hole 73, the pull block 111 is pushed, and the pull block 111 drives the limit bending rod 112 to move, so that the limit bending rod 112 is inserted into the through hole 113 of the first twisting block 752, so that the first twisting block 752 cannot rotate, thereby ensuring that the first positioning rod 74 is stably connected to the first positioning hole 73. , preventing the packaging plate 6 from falling, providing protection for the installation of the waterproof breathable membrane 5. When installing the temperature and humidity sensor, the connecting block 152 is inserted into the connecting groove 151 to connect the mounting block 13 with the mounting plate 14, and then the second driving component 155 is used to drive the second positioning rod 154 to move, so that the second positioning rod 154 is inserted into the second positioning hole 153, so that the connecting block 152 is fixed to the connecting groove 151, so that the mounting block 13 is connected and fixed to the mounting plate 14, and the installation of the temperature and humidity sensor can be realized.

Claims

1. A temperature and humidity sensor, characterized in that: It includes a shell body, a circuit board is arranged inside the shell body, a data line is welded on one side of the circuit board, a silicone rubber block is arranged on one side of the circuit board and the data line, a packaging board is connected to one side of the shell body, a waterproof breathable membrane is fixedly connected to one side of the packaging board, a sealing gasket is fixedly connected to the side of the shell body away from the waterproof breathable membrane, one side of the data line passes through the sealing gasket, a mounting ring is fixedly connected to the shell body between the waterproof breathable membrane and the sealing gasket, a first fixing mechanism is arranged between the mounting ring and the packaging board, a limiting mechanism is arranged on one side of the first fixing mechanism, a mounting block is fixedly connected to the side of the shell body away from the mounting ring, a mounting plate is arranged below the mounting block, and a second fixing mechanism is arranged between the mounting block and the mounting plate.

2. A temperature and humidity sensor according to claim 1, characterized in that: The first fixing mechanism includes a socket, which is opened inside the mounting ring, a rod is inserted into the socket, a first positioning hole is opened inside the rod, and four first positioning holes are opened, a first positioning rod is inserted into the first positioning hole, first driving components are provided on both sides of the mounting ring, and the first positioning rod is movably connected to the first positioning hole through the first driving component.

3. A temperature and humidity sensor according to claim 2, characterized in that: The first driving assembly includes a first square groove, which is opened inside the mounting ring. A first screw rod is rotatably connected inside the first square groove, a first torsion block is fixedly connected to the top end of the first screw rod, the first positioning rod is threadedly connected to the first screw rod, and one side of the first positioning rod is slidably connected to the first square groove.

4. A temperature and humidity sensor according to claim 3, characterized in that: Limiting grooves are provided on both sides of the first square groove, and the limiting grooves are slidably connected to limiting blocks, and one side of the limiting block is fixedly connected to one side of the first positioning rod.

5. A temperature and humidity sensor according to claim 3, characterized in that: The limiting mechanism comprises a through hole, which is arranged inside the first torsion block, a limiting bending rod is inserted inside the through hole, a pulling block is fixedly connected to the end of the limiting bending rod, and one side of the pulling block is embedded and slidably arranged in the mounting ring.

6. A temperature and humidity sensor according to claim 5, characterized in that: A slide groove is provided inside the mounting ring, a slider is slidably connected inside the slide groove, the slider is fixedly connected to the bottom end of the pull block, an embedding groove is provided on one side inside the slide groove, an embedding block is slidably connected inside the embedding groove, and the embedding block is fixedly connected to the slider.

7. A temperature and humidity sensor according to claim 1, characterized in that: A docking block is fixedly connected to one side of the packaging plate close to the shell body, a docking groove is provided on one side of the shell body close to the packaging plate, and the docking block is movably connected to the docking groove.

8. A temperature and humidity sensor according to claim 1, characterized in that: The second fixing mechanism includes a connecting groove, which is opened on both sides of the bottom end of the mounting block, a connecting block is inserted into the interior of the connecting groove, the connecting block is fixedly connected to the mounting plate, a second positioning hole is opened inside the connecting block, a second positioning rod is inserted into the interior of the second positioning hole, second driving components are provided on both sides of the mounting block, and the second positioning rod is movably connected to the second positioning hole through the second driving component.

9. A temperature and humidity sensor according to claim 8, characterized in that: The second driving assembly includes a second torsion block, which is rotatably connected to one side of the mounting block, and the second torsion block extends into a side of the mounting block and is fixedly connected to a first bevel gear, one side of the first bevel gear is meshedly connected to a second bevel gear, one side of the second bevel gear is fixedly connected to a second screw rod, a second square groove is opened inside the mounting block, the second screw rod is rotatably connected to the inside of the second square groove, and one side of the second positioning rod is slidably connected to the second square groove.

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