A small waterproof piezoelectric accelerometer

Abstract

This invention relates to the field of sensor technology, specifically to a small waterproof piezoelectric accelerometer sensor. It includes a main sensing assembly with a connecting tube containing a built-in PIN pin fixed to its upper end. Multiple pressure-bearing mechanisms are evenly spaced around the lower end of the connecting tube containing the built-in PIN pin. Each pressure-bearing mechanism has a push rod, and the upper ends of each push rod are connected to a lifting mechanism, which has a lifting ring. A mounting cavity is located at the lower end of the connecting tube containing the built-in PIN pin, and both the pressure-bearing and lifting mechanisms are housed within this cavity. This invention, through ingenious component connection, enables the corresponding components to operate when the connecting tube containing the built-in PIN pin is connected to an external component. This effectively seals the connection point between the connecting tube containing the built-in PIN pin and the external component, achieving waterproofing and ensuring the transmission of acceleration information detected by the main sensing assembly.

Description

Technical Field

[0001] This invention relates to the field of sensor technology, and in particular to a small waterproof piezoelectric accelerometer. Background Technology

[0002] A piezoelectric accelerometer is a device that uses the piezoelectric effect to convert electromechanical energy. It has the advantages of high sensitivity, wide frequency response, and strong environmental adaptability, and is widely used in military and civilian fields such as nuclear power, aerospace, road and bridge construction, and architectural design.

[0003] The rapid development of health monitoring technologies has led to increasingly stringent requirements for the voltage withstand capability and insulation of sensors in monitoring systems. Existing piezoelectric accelerometers, with their piezoelectric sensing elements, mass blocks, and charge amplifiers, can detect vibrations in the surrounding environment. However, these sensors have poor voltage withstand capability and surge protection. They are easily damaged by lightning strikes or abnormally high voltage inputs, potentially causing safety accidents. Therefore, the voltage withstand capability and surge protection of sensors directly affect their safety and reliability, and are key technologies influencing the reliability of monitoring systems.

[0004] A piezoelectric accelerometer, disclosed in CN109324211B, comprises an external component, an internal component, and an insulating cover. The external component has a cavity within it. The internal component, disposed within the cavity, includes a shielding cover and a sensor core housed within the shielding cover. The insulating cover is disposed within the cavity and is fitted to the outer peripheral wall of the shielding cover. The piezoelectric accelerometer provided by this invention exhibits good voltage resistance and insulation, and is not easily broken down when subjected to lightning strikes or abnormally high voltage inputs.

[0005] The above technical solution can effectively protect and accurately detect and sense components. However, in actual use, the variability of the environment can cause the components to be attacked by severe weather. For example, during thunderstorms, water intrusion can reduce the quality of detection and sensing, so improvements are needed. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a small, waterproof piezoelectric accelerometer.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A small waterproof piezoelectric accelerometer includes a sensing body assembly, the upper end of which is fixed with a connecting tube containing a built-in PIN pin.

[0009] The lower end of the connecting tube with the built-in PIN pin is provided with multiple pressure-bearing mechanisms at equal intervals. Each pressure-bearing mechanism is provided with a push rod. The upper end of each push rod is connected to a lifting mechanism. Each lifting mechanism is provided with a lifting ring.

[0010] The lower end of the connecting tube with the built-in PIN pin is provided with an installation cavity. The pressure-receiving mechanism and the pushing mechanism are both located in the installation cavity. The upper end of the connecting tube with the built-in PIN pin is provided with an annular groove. The annular groove is located at the upper end of the installation cavity. The upper end of the pushing tooth extends into the annular groove. The upper ends of multiple pushing teeth are jointly fixed with a pressure-applying mechanism.

[0011] The pressure applying mechanism is equipped with a lifting frame, and the lifting frame is equipped with a high-pressure airbag assembly, which is fitted with an annular wear-resistant sealing gasket.

[0012] Compared with the prior art, the present invention, through ingenious component connection, enables the corresponding component to operate when the connecting tube with the built-in PIN pin is connected to the external component, so as to effectively seal the connection position between the connecting tube with the built-in PIN pin and the external component, thereby achieving waterproofing and ensuring stable transmission of information data.

[0013] Preferably, the pressure-bearing mechanism includes multiple openings around the lower end of the connecting tube with the built-in PIN pin, and the multiple openings are equally spaced at the lower end of the connecting tube with the built-in PIN pin.

[0014] The opening and the mounting cavity are connected through each other. A swing rod is rotatably sleeved in the opening. An elastic reset mechanism is provided in the swing rod. A sliding frame is provided on the elastic reset mechanism. The sliding frame is slidably installed in the swing rod. An inclined plate is rotatably connected in the sliding frame. The push rod is rotatably connected to one side of the push rod.

[0015] The swing arm is tilted.

[0016] Furthermore, the arrangement of multiple openings and internal components within the openings allows the internal components to be pressurized to provide power for the operation of the rocker arm and the internal components of the annular groove.

[0017] One end of the lever passes through the opening and extends to the outside of the connecting tube with the built-in pin. When the internally threaded connecting tube descends, it causes the lever to rotate into the opening to power the operation of the swashplate.

[0018] Preferably, the elastic reset mechanism includes a notch opened on the side of the swing arm near the inclined plate, a positioning shaft fixed in the notch, a sliding frame slidably mounted on the positioning shaft, a reset spring sleeved on the positioning shaft, and the two ends of the reset spring being fixed to the top of the notch and the sliding frame, respectively.

[0019] Furthermore, the return spring can contract when subjected to external force. That is, when the rocker arm is squeezed by the internally threaded connecting pipe, it will cause the inclined plate to move in the vertical direction, that is, the inclined plate to rotate in the direction of the mounting cavity. The rotation of the inclined plate can cause the push rod to move in the vertical state, so that the push rod can push the drive tooth to rise.

[0020] Preferably, the lifting mechanism includes a plurality of lifting gears rotatably connected to a circumferential side wall inside the mounting cavity, a drive gear is fixed to one side of each lifting gear, and the lifting gear and the drive gear are coaxially arranged.

[0021] Multiple drive teeth are slidably installed in the mounting cavity, and the multiple drive teeth mesh with multiple drive gears respectively. The lower ends of multiple push rods are rotatably connected to the lower ends of the multiple drive teeth.

[0022] Multiple lifting teeth are respectively engaged with multiple lifting gears, and the lifting teeth are slidably installed in the mounting cavity.

[0023] Furthermore, controlling the diameter ratio of the drive gear and the push gear to achieve a linear velocity of the push gear greater than that of the drive gear helps to increase the travel distance of the push gear.

[0024] Preferably, the driving gear condition and the pushing gear condition are set on the same side of the driving gear axis.

[0025] Furthermore, when the driving gear rises and drives the driving gear to rotate, the driving gear and the pushing gear will rotate in the same direction. Only when the driving gear and the pushing gear are set on the same side can the movement direction of the driving gear and the pushing gear be guaranteed to be the same; otherwise, they may move in opposite directions.

[0026] Preferably, the pressure applying mechanism includes a lifting ring fixed to the upper end of a plurality of lifting teeth, the lifting ring having an elastic mechanism, the elastic mechanism having a connecting ring, the connecting ring being disposed through an annular groove, and the lifting frame being fixed to the upper end of the connecting ring;

[0027] Multiple lifting shafts are slidably installed at equal intervals inside the connecting ring. The lower ends of the multiple lifting shafts are all fixed to the upper ends of the pushing ring. The upper ends of the multiple lifting shafts are jointly fixed to an abutting ring. The abutting ring is located inside the connecting ring and abuts against the lower end of the high-pressure airbag assembly.

[0028] Furthermore, the elastic mechanism enables the lifting ring to drive the connecting ring to rise and fall, so that the connecting ring can drive the lifting frame to rise, causing the lifting frame to come into contact with the internally threaded connecting pipe.

[0029] When the threaded connecting pipe of the lifting frame component comes into contact with the connecting ring, it prevents the connecting ring from rising. However, under the action of the elastic mechanism, the pushing teeth can continue to push the pushing ring component to rise, so that the pushing ring component can drive the lifting shaft to move the contacting ring component towards the lifting frame component. This shortens the distance between the lifting frame component and the contacting ring component, and can apply pressure to the high-pressure airbag assembly installed between the lifting frame component and the contacting ring component in order to compress the gas inside the high-pressure airbag assembly.

[0030] Preferably, the elastic mechanism includes a plurality of vertical shafts fixed at equal intervals to the lower end of the connecting ring, the lower ends of the plurality of vertical shafts being slidably mounted on the lifting ring, and a resistance spring being sleeved on the lower end of the vertical shaft, the two ends of the resistance spring being fixed to the lower end of the lifting ring and the lower end of the vertical shaft, respectively.

[0031] Furthermore, when the lifting teeth rise, they can cause the lifting ring to rise, which in turn pulls the resistance spring, causing the resistance spring to apply an external force to the lower end of the vertical shaft, so that the vertical shaft can follow the lifting ring and rise. The vertical shaft can then push the connecting ring to rise.

[0032] Preferably, a lifting groove is provided on one end sidewall of the annular groove, and a lifting block is slidably installed in the lifting groove, the lifting block being fixed to the lower end of the connecting ring.

[0033] Furthermore, the lifting block can slide up and down within the lifting groove. The lifting block ensures that the connecting ring can only move stably within the annular groove, thereby driving the components within it to move up and down.

[0034] Preferably, a sealing gasket ring is fixed to the lower end of the sensing body assembly.

[0035] Furthermore, the sensor body assembly consists of a sensor body component and a connecting ring component at the lower end. The sensor body component adopts a cylindrical structure, and the diameter of the connecting ring component is larger than the diameter of the sensor body component. The specifications of the sealing gasket ring component are the same as those of the connecting ring component.

[0036] The beneficial effects of this invention are:

[0037] 1. The connection can be achieved through the PIN pin in the connecting tube with built-in PIN pin, so as to transmit information data. The data information detected in the main sensor component can be transmitted. The main sensor component is an existing technology component, and its operation and principle are common knowledge. The connecting tube with internal thread and the connecting tube with built-in PIN pin are screwed together, so that the PIN pin connecting component in the connecting tube and the PIN pin in the connecting tube with built-in PIN pin can be connected, thus realizing the transmission of information data.

[0038] 2. The rising of the connecting ring can drive the lifting frame to rise. A corresponding sealing gasket is installed at the upper end of the lifting frame. The connecting pipe with the external internal thread is screwed onto the connecting pipe with the built-in PIN pin, so that the connecting pipe with the built-in PIN pin passes through into the connecting pipe. After the connection is completed, the sealing gasket at the upper end of the lifting frame and the top of the connecting pipe abut against each other to perform a sealing operation. At the same time, the connecting pipe will squeeze the swing rod so that the corresponding parts in the connecting pipe with the built-in PIN pin can operate, so as to more fully seal the connection position between the connecting pipe and the connecting pipe with the built-in PIN pin and prevent leakage, so as to fully play the role of waterproofing.

[0039] 3. The pushing ring can drive the lifting shaft so that the abutting ring moves towards the lifting frame, shortening the distance between the lifting frame and the abutting ring. This applies pressure to the high-pressure airbag assembly installed between the lifting frame and the abutting ring, compressing the gas inside the high-pressure airbag assembly and causing it to deform. This allows the annular wear-resistant sealing gasket to contact the internally threaded connecting pipe, and the deformed annular wear-resistant sealing gasket fills the gap, preventing leakage. Attached Figure Description

[0040] Figure 1 This is a structural diagram of the present invention;

[0041] Figure 2 This is a structural diagram showing the positions of the annular wear-resistant sealing gasket, high-pressure airbag assembly, lifting frame component, and connecting tube with built-in PIN pin in this invention.

[0042] Figure 3 This is a structural diagram showing the position of the connecting tube and the lifting frame component with built-in PIN pins in this invention;

[0043] Figure 4 This is a cross-sectional view of the connecting tube with built-in PIN pins in this invention;

[0044] Figure 5 Appendix to this invention Figure 4 Enlarged view of point A;

[0045] Figure 6 Appendix to this invention Figure 4 Enlarged view of point B;

[0046] Figure 7 This is a diagram showing the connection structure between the rocker arm and the inclined plate in this invention;

[0047] In the diagram: 1. Sensor main body assembly, 2. Sealing gasket ring, 3. Connecting tube with built-in PIN pin, 4. Annular groove, 5. Lifting frame, 6. High-pressure airbag assembly, 7. Annular wear-resistant sealing gasket, 8. Contact ring, 9. Connecting ring, 10. Push ring, 11. Lifting shaft, 12. Mounting cavity, 13. Lifting block, 14. Lifting groove, 15. Vertical shaft, 16. Resistance spring, 17. Pushing gear condition, 18. Pushing gear, 19. Drive gear, 20. Drive gear condition, 21. Swing rod, 22. Reset spring, 23. Sliding frame, 24. Inclined plate, 25. Positioning shaft, 26. Push rod. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0049] Reference Figures 1-7 A small waterproof piezoelectric accelerometer includes a sensing body component 1, with a connecting tube 3 containing a built-in PIN pin fixed at the upper end of the sensing body component 1; the PIN pin in the connecting tube 3 can be used to achieve connection so as to transmit information data, and the data information detected in the sensing body component 1 can be transmitted. The sensing body component 1 is a prior art component, and its operation and principle are common knowledge and do not need to be disclosed again.

[0050] The lower end of the connecting tube 3 with built-in PIN pins is provided with multiple pressure-bearing mechanisms at equal intervals. Each pressure-bearing mechanism is provided with a push rod 26. The upper ends of each push rod 26 are connected to a lifting mechanism, and the lifting mechanism is provided with a lifting ring 10. The operation of the pressure-bearing mechanism and the lifting mechanism can provide power for the operation of the lifting tooth condition 17, so that the lifting tooth condition 17 can move a large distance with a small movement distance, thus providing power for the movement of the connecting ring 9.

[0051] In this embodiment, the lower end of the connecting tube 3 with the built-in PIN needle is provided with a mounting cavity 12. Both the pressure-bearing mechanism and the pushing mechanism are disposed in the mounting cavity 12. The upper end of the connecting tube 3 with the built-in PIN needle is provided with an annular groove 4. The sealing component is disposed in the annular groove 4 to achieve an annular seal, thereby sealing the annular groove 4 with the threaded connection and preventing penetration from affecting the connection effect of the PIN needle in the connecting tube 3 with the built-in PIN needle. The annular groove 4 is disposed at the upper end of the mounting cavity 12, and the upper end of the pushing tooth condition 17 extends into the annular groove 4. The upper ends of multiple pushing teeth 17 are jointly fixed with a pressure applying mechanism, which can apply pressure to the high-pressure airbag assembly 6 so that the high-pressure airbag assembly 6 deforms. The pressure applying mechanism is provided with a lifting frame 5, and the high-pressure airbag assembly 6 is provided inside the lifting frame 5. The high-pressure airbag assembly 6 is fitted with an annular wear-resistant sealing gasket 7. When the lower end of the high-pressure airbag assembly 6 is squeezed, it will deform, causing the high-pressure airbag assembly 6 to push the annular wear-resistant sealing gasket 7 to become larger, so that the annular wear-resistant sealing gasket 7 can come into contact with the inner wall of the internally threaded connecting pipe, so as to achieve a more complete seal and achieve a waterproof effect.

[0052] In this embodiment, the pressure-bearing mechanism includes multiple openings around the lower end of the connecting tube 3 with the built-in PIN pin. The multiple openings are equally spaced at the lower end of the connecting tube 3 with the built-in PIN pin. Through the multiple openings and the arrangement of the components inside the openings, the components inside the openings are pressed to provide power for the operation of the swing arm 21 and the components inside the annular groove 4.

[0053] The opening and the mounting cavity 12 are connected, enabling the corresponding components to operate in conjunction. A swing rod 21 is rotatably sleeved inside the opening. The swing rod 21 is equipped with an elastic reset mechanism. A sliding frame 23 is provided on the elastic reset mechanism. The sliding frame 23 is slidably installed inside the swing rod 21. An inclined plate 24 is rotatably connected inside the sliding frame 23. A push rod 26 is rotatably connected to one side of the push rod 26. In actual production, the inclination angle of the inclined plate 24 is greater than 45°. When the swing rod 21 rotates towards the opening, the swing rod 21 can press the inclined plate 24 through the sliding frame 23, causing the inclined plate 24 to rotate towards the mounting cavity 12. The rotation of the inclined plate 24 can cause the push rod 26 to move towards a vertical position.

[0054] The lever 21 is tilted, and one end of the lever 21 passes through the opening and extends to the outside of the connecting tube 3 with the built-in pin. When the internally threaded connecting tube descends, the lever 21 will rotate into the opening to provide power for the operation of the inclined plate 24.

[0055] In this embodiment, the elastic reset mechanism includes a notch opened on the side of the rocker arm 21 near the inclined plate 24. A positioning shaft 25 is fixed in the notch, and a sliding frame 23 is slidably mounted on the positioning shaft 25. A reset spring 22 is sleeved on the positioning shaft 25. The two ends of the reset spring 22 are respectively fixed to the top of the notch and the sliding frame 23. The reset spring 22 can retract when subjected to external force. That is, when the rocker arm 21 is squeezed by the internally threaded connecting pipe, the inclined plate 24 will move in the vertical direction, that is, the inclined plate 24 will rotate in the direction of the mounting cavity 12. The rotation of the inclined plate 24 can cause the push rod 26 to also move in the vertical state, so that the push rod 26 can push the drive gear condition 20 to rise.

[0056] In this embodiment, the lifting mechanism includes a plurality of lifting gears 18 rotatably connected to the inner side wall of the mounting cavity 12. A drive gear 19 is fixed to one side of each lifting gear 18, and the lifting gear 18 and the drive gear 19 are coaxially arranged. In actual operation, the diameter ratio of the drive gear 19 and the lifting gear 18 is controlled so that the linear velocity of the lifting gear 18 is greater than that of the drive gear 19, which helps to increase the moving distance of the lifting gear condition 17.

[0057] Multiple drive gears 20 are slidably installed in the mounting cavity 12. The multiple drive gears 20 mesh with multiple drive gears 19 respectively. The lower ends of multiple push rods 26 are rotatably connected to the lower ends of the multiple drive gears 20. By controlling the movement of the push rods 26, that is, when the internally threaded connecting tube and the connecting tube 3 with the built-in PIN needle are connected, the push rods 26 can push the drive gears 20 to rise, so that the drive gears 20 drive the drive gears 19 to rotate, so that the push gear 18 can rotate, providing power for the operation of other corresponding components, so as to achieve sealing.

[0058] Multiple lifting teeth 17 mesh with multiple lifting gears 18 respectively, and the lifting teeth 17 are slidably installed in the mounting cavity 12; through the sliding installation of the lifting teeth 17, it can be ensured that the lifting ring 10 is driven to rise and fall under the action of the lifting gears 18.

[0059] In this embodiment, the driving gear condition 20 and the lifting gear condition 17 are set on the same side of the axis of the driving gear 19. When the driving gear condition 20 rises and drives the driving gear 19 to rotate, the driving gear 19 and the lifting gear 18 will rotate in the same direction. Only when the driving gear condition 20 and the lifting gear condition 17 are set on the same side can the movement directions of the driving gear condition 20 and the lifting gear condition 17 be guaranteed to be the same. Otherwise, they will move in opposite directions.

[0060] The sealing operation is powered by the co-directional operation of the push tooth condition 17 and the drive tooth condition 20.

[0061] In this embodiment, the pressure applying mechanism includes a lifting ring 10 fixed to the upper end of a plurality of lifting teeth 17. The lifting ring 10 is provided with an elastic mechanism, and the elastic mechanism is provided with a connecting ring 9. The connecting ring 9 is disposed through the annular groove 4, and the lifting frame 5 is fixed to the upper end of the connecting ring 9. The elastic mechanism enables the lifting ring 10 to drive the connecting ring 9 to rise and fall, so that the connecting ring 9 can drive the lifting frame 5 to rise, so that the lifting frame 5 and the internally threaded connecting pipe come into contact.

[0062] Multiple lifting shafts 11 are slidably installed at equal intervals inside the connecting ring 9. The lower ends of the multiple lifting shafts 11 are all fixed to the upper ends of the pushing ring 10. The upper ends of the multiple lifting shafts 11 are all fixed to the abutting ring 8, which is located inside the connecting ring 9 and abuts against the lower end of the high-pressure airbag assembly 6. When the threaded connecting pipe of the lifting frame 5 abuts, the connecting ring 9 cannot rise. However, under the action of the elastic mechanism, the pushing tooth condition 17 can continue to push the pushing ring 10 to rise, so that the pushing ring 10 can drive the lifting shafts 11 to move the abutting ring 8 towards the lifting frame 5, thereby shortening the distance between the lifting frame 5 and the abutting ring 8. This can apply pressure to the high-pressure airbag assembly 6 installed between the lifting frame 5 and the abutting ring 8, so as to compress the gas inside the high-pressure airbag assembly 6, causing the high-pressure airbag assembly 6 to deform, providing power for the abutment between the annular wear-resistant sealing gasket 7 and the threaded connecting pipe, and further sealing.

[0063] Through the clever cooperation between the above components, two sealing structures can be formed between the connecting tube 3 with built-in PIN pin and the connecting tube with internal thread to improve the waterproof effect.

[0064] Meanwhile, the flexible mechanism allows the connecting ring 9 to rise and stop before applying pressure to the high-pressure airbag assembly 6. When disassembling, the connecting ring 9 can be lowered after the high-pressure airbag assembly 6 returns to its original state.

[0065] In this embodiment, the elastic mechanism includes a plurality of vertical shafts 15 fixed at equal intervals to the lower end of the connecting ring 9. The lower ends of the plurality of vertical shafts 15 are slidably mounted on the lifting ring 10. A resistance spring 16 is sleeved on the lower end of the vertical shaft 15. The two ends of the resistance spring 16 are respectively fixed to the lower end of the lifting ring 10 and the lower end of the vertical shaft 15. When the lifting tooth condition 17 rises, it can cause the lifting tooth condition 17 to drive the lifting ring 10 to rise. The lifting ring 10 can pull the resistance spring 16, so that the resistance spring 16 applies an external force to the lower end of the vertical shaft 15, so that the vertical shaft 15 rises with the lifting ring 10. The vertical shaft 15 can push the connecting ring 9 to rise.

[0066] In actual operation, the rising of the connecting ring 9 can drive the lifting frame 5 to rise. A corresponding sealing gasket is installed on the upper end of the lifting frame 5. The connecting pipe with the external internal thread is screwed onto the connecting pipe 3 with the built-in PIN needle, so that the connecting pipe 3 with the built-in PIN needle passes through into the connecting pipe. After the connection is completed, the sealing gasket at the upper end of the lifting frame 5 and the top of the connecting pipe abut against each other to perform a sealing operation. At the same time, the connecting pipe will squeeze the swing rod 21 so that the corresponding parts in the connecting pipe 3 with the built-in PIN needle can operate, so as to more fully seal the connection position between the connecting pipe and the connecting pipe 3 with the built-in PIN needle and avoid leakage, so as to fully play the role of waterproofing.

[0067] In this embodiment, a lifting groove 14 is provided on one end side wall of the annular groove 4, and a lifting block 13 is slidably installed in the lifting groove 14. The lifting block 13 is fixed to the lower end of the connecting ring 9. The lifting block 13 can slide up and down in the lifting groove 14. The lifting block 13 can ensure that the connecting ring 9 can only move up and down stably in the annular groove 4, so as to drive the components inside to move up and down.

[0068] In this embodiment, a sealing gasket ring 2 is fixed at the lower end of the sensing main body assembly 1; the sensing main body assembly 1 consists of a sensing main body and a connecting ring at the lower end, the sensing main body adopts a cylindrical structure, and the diameter of the connecting ring is larger than the diameter of the sensing main body.

[0069] In actual production, multiple bolt connection holes are equally spaced around the circumference of the connecting ring. The bolt connection holes also penetrate the sealing ring 2. During installation, the bolts can pass through the bolt connection holes and connect with the threaded holes at the installation position. The rotation of the connecting bolts can move the sensing main component 1 toward the installation part, which can squeeze the sealing ring 2, causing the sealing ring 2 to deform and fill the gap, thus preventing leakage and seepage.

[0070] In this invention, the internally threaded connecting tube and the connecting tube 3 with built-in PIN pins are screwed together, which enables the PIN pin connecting component in the connecting tube to connect with the PIN pin in the connecting tube 3 with built-in PIN pins, thus enabling the transmission of information data. When the internally threaded connecting tube enters the connecting tube 3 with built-in PIN pins, the swing rod 21 rotates toward the opening, which causes the swing rod 21 to press the inclined plate 24 through the sliding frame 23, causing the inclined plate 24 to rotate toward the mounting cavity 12. The rotation of the inclined plate 24 causes the push rod 26 to move toward the vertical state.

[0071] When the drive gear condition 20 rises and drives the drive gear 19 to rotate, the drive gear 19 and the push gear 18 will rotate in the same direction. Only when the drive gear condition 20 and the push gear condition 17 are set on the same side can the movement direction of the drive gear condition 20 and the push gear condition 17 be guaranteed to be the same. The push gear condition 17 can push the push ring 10 to rise.

[0072] When the lifting tooth condition 17 rises, it can cause the lifting tooth condition 17 to drive the lifting ring 10 to rise. The lifting ring 10 can pull the resistance spring 16, so that the resistance spring 16 applies an external force to the lower end of the vertical shaft 15, so that the vertical shaft 15 rises with the lifting ring 10. The vertical shaft 15 can push the connecting ring 9 to rise.

[0073] In actual operation, the rising of the connecting ring 9 can drive the lifting frame 5 to rise. A corresponding sealing gasket is installed on the upper end of the lifting frame 5. The connecting pipe with the external internal thread is screwed onto the connecting pipe 3 with the built-in PIN needle, so that the connecting pipe 3 with the built-in PIN needle passes through into the connecting pipe. After the connection is completed, the sealing gasket at the upper end of the lifting frame 5 and the top of the connecting pipe abut against each other to perform a sealing operation. At the same time, the connecting pipe will squeeze the swing rod 21 so that the corresponding parts in the connecting pipe 3 with the built-in PIN needle can operate, so as to more fully seal the connection position between the connecting pipe and the connecting pipe 3 with the built-in PIN needle and avoid leakage, so as to fully play the role of waterproofing.

[0074] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A small waterproof piezoelectric accelerometer, comprising a sensing body assembly (1), wherein a connecting tube (3) with a built-in PIN pin is fixed at the upper end of the sensing body assembly (1). The lower end of the connecting tube (3) with built-in PIN pin is provided with multiple pressure-bearing mechanisms at equal intervals. Each pressure-bearing mechanism is provided with a push rod (26). The upper ends of the multiple push rods (26) are connected to a lifting mechanism. Each lifting mechanism is provided with a lifting ring (10). The lower end of the connecting tube (3) with the built-in PIN needle is provided with an installation cavity (12). The pressure-bearing mechanism and the lifting mechanism are both located in the installation cavity (12). The upper end of the connecting tube (3) with the built-in PIN needle is provided with an annular groove (4). The annular groove (4) is located at the upper end of the installation cavity (12). The upper end of the lifting tooth condition (17) extends into the annular groove (4). The upper ends of multiple lifting tooth conditions (17) are jointly fixed with a pressure-applying mechanism. The pressure applying mechanism is provided with a lifting frame (5), and a high-pressure airbag assembly (6) is provided inside the lifting frame (5). An annular wear-resistant sealing gasket (7) is fitted on the high-pressure airbag assembly (6).

2. A small waterproof piezoelectric acceleration sensor according to claim 1, characterized in that: The pressure-bearing mechanism includes multiple openings around the lower end of the connecting tube (3) with the built-in PIN needle, and the multiple openings are equally spaced at the lower end of the connecting tube (3) with the built-in PIN needle. The opening and the mounting cavity (12) are connected through each other. A swing rod (21) is rotatably sleeved in the opening. An elastic reset mechanism is provided in the swing rod (21). A sliding frame (23) is provided on the elastic reset mechanism. The sliding frame (23) is slidably installed in the swing rod (21). An inclined plate (24) is rotatably connected in the sliding frame (23). The push rod (26) is rotatably connected to one side of the push rod (26). The swing arm (21) is set at an angle.

3. A small waterproof piezoelectric acceleration sensor according to claim 2, characterized in that: The elastic reset mechanism includes a notch opened on the side of the swing arm (21) near the inclined plate (24), a positioning shaft (25) is fixed in the notch, the sliding frame (23) is slidably mounted on the positioning shaft (25), and a reset spring (22) is sleeved on the positioning shaft (25). The two ends of the reset spring (22) are respectively fixed to the top of the notch and the sliding frame (23).

4. The small waterproof piezoelectric acceleration sensor according to claim 1, characterized in that: The lifting mechanism includes a plurality of lifting gears (18) rotatably connected to the inner side wall of the mounting cavity (12). A drive gear (19) is fixed on one side of the lifting gear (18), and the lifting gear (18) and the drive gear (19) are coaxially arranged. Multiple drive gears (20) are slidably installed in the mounting cavity (12). The multiple drive gears (20) mesh with multiple drive gears (19) respectively. The lower ends of multiple push rods (26) are rotatably connected to the lower ends of the multiple drive gears (20). Multiple pusher teeth (17) mesh with multiple pusher gears (18) respectively, and the pusher teeth (17) are slidably installed in the mounting cavity (12).

5. A small waterproof piezoelectric accelerometer according to claim 4, characterized in that: The driving gear condition (20) and the lifting gear condition (17) are set on the same side of the axis of the driving gear (19).

6. A small waterproof piezoelectric accelerometer according to claim 1, characterized in that: The pressure application mechanism includes a push ring (10) fixed to the upper end of multiple push teeth (17), the push ring (10) is provided with an elastic mechanism, the elastic mechanism is provided with a connecting ring (9), the connecting ring (9) is disposed through the annular groove (4), and the lifting frame (5) is fixed to the upper end of the connecting ring (9). Multiple lifting shafts (11) are slidably installed at equal intervals inside the connecting ring (9). The lower ends of the multiple lifting shafts (11) are all fixed to the upper end of the pushing ring (10). The upper ends of the multiple lifting shafts (11) are jointly fixed to the abutting ring (8). The abutting ring (8) is located inside the connecting ring (9) and abuts against the lower end of the high-pressure airbag assembly (6).

7. A small waterproof piezoelectric accelerometer according to claim 1, characterized in that: The elastic mechanism includes multiple vertical shafts (15) fixed at equal intervals at the lower end of the connecting ring (9). The lower ends of the multiple vertical shafts (15) are slidably mounted on the lifting ring (10). A resistance spring (16) is sleeved on the lower end of the vertical shaft (15). The two ends of the resistance spring (16) are respectively fixed to the lower end of the lifting ring (10) and the lower end of the vertical shaft (15).

8. A small waterproof piezoelectric accelerometer according to claim 6, characterized in that: A lifting groove (14) is provided on one end side wall of the annular groove (4), and a lifting block (13) is slidably installed in the lifting groove (14). The lifting block (13) is fixed to the lower end of the connecting ring (9).

9. A small waterproof piezoelectric accelerometer according to claim 1, characterized in that: A sealing gasket ring (2) is fixed to the lower end of the sensing main body assembly (1).

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