Electrically controlled pneumatic telescopic rod and electrically controlled air gate method

Abstract

This invention relates to an electrically controlled pneumatic telescopic rod and its electric valve control method. It includes a first tube and a second tube connected by a plug. The plug has a movable end and a connecting end at its two ends. A sliding ring is connected to the end of the first tube. An air intake gap is left between the outer side of the second tube and the inner side of the through hole. The movable end passes into the cavity, and an air intake channel is left between the outer side of the movable end and the inner wall of the first tube. This invention converts the rotational drive of a drive motor into the lifting and sliding motion of the motor base. During descent, the compression part can compress the first sealing ring, causing it to expand radially and adhere tightly to the inner wall of the first tube, forming a locked state. During ascent, the compression force on the first sealing ring is eliminated, and the first sealing ring regains its elasticity. The air intake gap communicates with the air intake channel, allowing gas in the cavity to be freely filled or expelled, enabling the second tube to slide smoothly along the cavity to adjust the telescopic length.

Description

Technical Field

[0001] This invention relates to the field of telescopic rods, and more specifically to electrically controlled pneumatic telescopic rods and their electric valve control methods. Background Technology

[0002] A pneumatic telescopic pole is a device that achieves linear length adjustment through air pressure. It has a wide range of applications, including but not limited to photography equipment (such as monopods, bipods, and tripods), selfie sticks, fishing rods, sports equipment, and multi-section telescopic poles. Pneumatic telescopic poles mainly involve pneumatic control. By cleverly combining the principles of air pressure with mechanical structures, simple inflation and deflation operations are performed to achieve flexible adjustment of the position and posture of objects.

[0003] The applicant previously applied for an invention patent for a pneumatic telescopic rod. The technical solution mainly solves the problem of controlling the telescopic range of a multi-section pipe body with air pressure. By manually pressing the push-type air valve on the control flange, the air intake channel can be opened or closed when the air valve is manually pressed, thereby controlling the amount of air in the pipe body and realizing convenient adjustment of the telescopic stroke.

[0004] However, in actual use, the extension and retraction of this pneumatic telescopic rod still has certain defects. The prior art solution uses a manual press of the air valve to control the connection of the air intake channel and a relatively sliding telescopic tube body to control the extension and retraction length of the multi-section tube body. However, the portability of manual control is limited, which affects the actual operating experience. Therefore, there is an urgent need for an intelligent control air intake channel connection and a stable and reliable electric control pneumatic telescopic rod. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned deficiencies and provide an electrically controlled pneumatic telescopic rod and its electric valve control method. The invention incorporates a drive motor, a liftable motor mount, and a pipe plug in cooperation with a first sealing ring to solve the technical problem in the background art of how to connect or close the electrically controllable air intake channel of the pneumatic telescopic rod, thereby improving automated operation control and user experience.

[0006] The objective of this invention is achieved through the following means:

[0007] An electrically controlled pneumatic telescopic rod includes a first tube and a second tube that is movably inserted into the first tube. The first tube has a cavity inside for receiving and accommodating the second tube. The first tube and the second tube are movably connected by a tube plug. The two ends of the tube plug are respectively formed as a movable end and a connecting end for connecting the first tube and the second tube. A sliding stop ring is connected to the end of the first tube near the second tube for stopping and limiting the movable end.

[0008] The middle part of the sliding ring has a through hole through which the second tube can pass. An air intake gap is left between the outer side of the second tube and the inner side of the through hole. The movable end is inserted into the cavity, and an air intake channel is left between the outer side of the movable end and the inner wall of the first tube. When the air intake gap and the air intake channel are connected, the gas content in the cavity can be filled or squeezed out. The end of the movable end extending into the cavity has a first sealing part, and a first sealing ring for sealing and isolating the air intake channel and the cavity is fitted on the first sealing part.

[0009] A motor base is connected to the movable end by a limiting bolt. The motor base includes a pushing part and a pressing part. The pressing part extends toward the first sealing ring and has a sleeve hole that matches the first sealing part. The limiting bolt can provide radial limiting to the motor base, so that the motor base can move up and down axially. A drive motor is connected to the motor base by a fixing member. The drive shaft of the drive motor passes through the motor base and is screwed to the pipe plug.

[0010] When the drive motor rotates and pushes the motor base to move closer to the tube plug, the sleeve hole of the motor base mates with the first sealing part, and applies pressure to the first sealing ring through the extrusion part, so that the first sealing ring is compressed and expands radially to fit tightly against the inner wall of the first tube body to seal the cavity, and the tube plug forms a locking position, which is the locked state.

[0011] When the drive motor rotates and moves the motor base away from the pipe plug, the sleeve hole of the motor base disengages from the first sealing part, the squeezing part moves away from the first sealing ring, the first sealing ring regains its elasticity, the air intake channel communicates with the cavity, and the pipe plug and the second pipe body can slide along the cavity. At this time, it is in the unlocked state.

[0012] Furthermore, the end of the first tube body away from the second tube body is the sealing end, one end of the sliding ring is the connecting part, the connecting part is paired with the end of the first tube body near the second tube body, the inner diameter of the through hole is smaller than the inner diameter of the cavity, and the outer diameter of the movable end is larger than the inner diameter of the through hole.

[0013] By setting the distal end of the first tube as the sealing end and using the connecting part of the sliding ring to match and connect with the end of the first tube, while limiting the inner diameter of the through hole to be smaller than the inner diameter of the cavity and the outer diameter of the movable end to be larger than the inner diameter of the through hole, the sliding ring can form an axial stop on the movable end, preventing the second tube and the plug from coming off the first tube during the expansion and contraction process, thus limiting the safe expansion and contraction limit position.

[0014] Furthermore, the tube plug is provided with a connecting screw hole for mating limit bolts, and the motor base is provided with a limit hole concentric with the connecting screw hole. The limit bolt includes a threaded part and a guide part, so that the limit bolt passes through the limit hole and is screwed to the connecting screw hole through the threaded part, and is mated with the limit hole through the guide part. Under the circumferential limitation of the limit bolt, the motor base can move axially.

[0015] The threaded part of the limit bolt is screwed into the threaded hole of the pipe plug, while the guide part cooperates with the limit hole of the motor base to provide circumferential limit and axial movement guidance for the motor base. This converts the rotational motion of the drive motor into the linear reciprocating motion of the motor base along the axial direction, preventing excessive deflection of the motor base during movement and further ensuring the accuracy and reliability of electric control.

[0016] Furthermore, a limiting part is provided at the end of the guide portion away from the tube plug, and a return spring is provided that is pressed between the limiting part and the pushing part. The return spring is used to provide the motor base with an elastic force that always approaches and squeezes the first sealing ring.

[0017] By setting a limiting part at the end of the guide part and pressing a return spring between the limiting part and the pushing part, the return spring can provide a continuous elastic thrust toward the tube plug to the motor seat in the locked state, ensuring that the squeezing part always presses the first sealing ring tightly. Even if the drive motor is powered off or subjected to vibration, the first sealing ring will still remain radially expanded and adhere to the inner wall of the first tube, achieving a reliable seal for the cavity and improving the stability and anti-vibration and anti-loosening ability of the telescopic rod locking.

[0018] Furthermore, the drive motor is located on the top of the pusher, and the fixing component is made of screws, which pass through the pusher and are connected and fixed to the drive motor. The pusher has a mounting hole for avoiding the drive shaft, and the tube plug has a threaded hole. One end of the drive shaft extends into the threaded hole and is threadedly connected to the threaded hole through the threaded end, so that the rotation of the drive motor can drive the motor seat to move relative to the tube plug.

[0019] The drive motor is fixed to the top of the push unit with screws, and the threaded end of the drive shaft is directly threaded to the threaded hole of the pipe plug, forming a compact and direct transmission structure. When the drive motor rotates, it can drive the motor base to move axially, improving the response speed and displacement accuracy of locking and unlocking actions, making electric operation more sensitive, control more precise, and improving the convenience of operation.

[0020] Furthermore, the connecting end is provided with a second sealing part, and a second sealing ring for sealing is fitted on the second sealing part.

[0021] The second sealing part and the second sealing ring are provided at the connection end, which can effectively seal the gap between the connection end of the plug and the inner wall of the second tube, ensuring the firmness and stability of the connection between the plug and the second tube. At the same time, when the second tube is connected to the third tube, the inner cavity of the second tube can be filled with gas to prevent the gas from escaping from the inner cavity of the second tube.

[0022] Furthermore, a sealed cavity is formed inside the second tube, and a third tube is detachably provided at the end of the second tube away from the first tube. A tube plug is provided between the third tube and the second tube, so that the third tube can slide along the sealed cavity of the second tube.

[0023] By forming a sealed cavity inside the second tube and adding a detachable third tube and plug, the electric locking and pneumatic telescopic principle is extended to multi-stage telescopic tubes or multi-section telescopic tube structures. Without increasing the length of a single tube section, the total stroke and adjustable range of the telescopic rod can be expanded through multiple telescopic tubes. The third tube can also achieve stable locking and smooth telescopic extension and retraction through an electric pneumatic mechanism, enhancing the product's adaptability to different usage scenarios and improving its flexibility of use.

[0024] Furthermore, the tube plug has a through hole for threading a wire, and a sealing plug is fitted onto the wire. One end of the wire is electrically connected to the drive motor, and the other end of the wire is electrically connected to a controller for controlling the forward or reverse rotation of the drive motor.

[0025] By opening a wire passage hole on the pipe plug and sealing the wire with a plug, a reliable electrical connection to the drive motor is achieved while ensuring the airtightness of the wire passage, preventing gas leakage from the cavity along the wire channel and affecting the pneumatic drive and locking effect. The controller controls the forward and reverse rotation of the drive motor to replace the manual pressing of the air valve, realizing one-button electric unlocking and locking, eliminating the defects of limited portability of manual control operation, and improving the level of intelligence and convenience of operation.

[0026] Furthermore, the pushing part is provided with a wire-passing hole for threading a wire.

[0027] The provided through-hole is designed to allow wires to pass through and exit.

[0028] An electric valve control method, including an electrically controlled pneumatic telescopic rod, wherein the controller is equipped with forward / reverse buttons, the control method comprising:

[0029] S101, when the reverse button of the controller is pressed, the drive motor rotates in the opposite direction along the threaded hole through the threaded end of the drive shaft. The motor base is fixedly connected to the motor base, converting the rotational motion of the drive motor into linear reciprocating motion, causing the motor base to slide axially away from the tube plug and overcome the elastic force of the return spring. The first sealing ring restores its elastic force, and the cavity is connected to the air intake channel and the air intake gap. The second tube can move along the cavity. At the same time, gas can pass through the air intake gap and the air intake channel into the cavity to fill or be squeezed out, so as to control the extension length. At this time, it is the unlocked sliding extension state.

[0030] S102, when the forward rotation button of the controller is pressed, the drive motor rotates forward along the threaded hole through the threaded end of the drive shaft. The motor base is fixedly connected to the motor base. At the same time, due to the circumferential limitation of the limit bolt, the forward rotation of the drive motor can push the motor base to move closer to the tube plug. The sleeve hole of the motor base matches the first sealing part and applies pressure to the first sealing ring through the extrusion part, so that the first sealing ring expands radially and adheres to the inner wall of the first tube body to form a seal for the cavity, thereby sealing the filling gas in the cavity. The motor base presses the tube plug to form a locking position. The second return spring restores its elastic force and provides the motor base with a continuous elastic force to press the first sealing ring. At this time, it is in the locked state.

[0031] The beneficial effects of this invention are:

[0032] When the drive motor moves the motor seat close to the tube plug, the extrusion part extrudes the first sealing ring, causing it to expand radially and adhere tightly to the inner wall of the first tube, thereby sealing the cavity and effectively preventing internal gas leakage, so that the second tube is locked relative to the first tube, forming a stable and reliable locking state.

[0033] When the drive motor moves the motor base away from the tube plug, the extrusion part disengages from the first sealing ring, the first sealing ring regains its elasticity, the air inlet gap connects with the air inlet channel, and the gas in the cavity can be freely filled or squeezed out, so that the second tube can slide smoothly along the cavity to adjust the extension length.

[0034] By setting a pipe plug with a first sealing ring between the first and second pipe bodies, and configuring a motor base that can move axially driven by a drive motor, the compression part of the motor base applies pressure or releases pressure on the first sealing ring. Combined with the elastic recovery of the first sealing ring, the cavity is sealed and locked, and the connection with the air intake channel is unlocked. The electric drive replaces the manual pressing of the air valve, eliminating the defects of limited portability of manual control operation, and realizing intelligent electric control of the air intake channel connection. The operator can complete the locking and unlocking of the telescopic rod without manually pressing the air valve, which significantly improves the convenience of operation and user experience. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1;

[0036] Figure 2 This is a schematic cross-sectional view from the first angle of this embodiment;

[0037] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0038] Figure 4 This is a schematic cross-sectional view from a second angle in this embodiment.

[0039] Figure 5 for Figure 4 A magnified view of part B in the diagram;

[0040] Figure 6 This is a schematic diagram of the internal structure of Embodiment 1;

[0041] Figure 7 This is a partial structural exploded view of Embodiment 1;

[0042] Figure 8 This is an exploded view of the overall structure of Embodiment 1;

[0043] Figure 9 This is a schematic diagram of the connection structure of the three-section pipe in Embodiment 2;

[0044] Figure 10 This is a schematic diagram of the monopod structure composed of three sections of tubing in Embodiment 2.

[0045] Figure 5 The filler in the text is a schematic line indicating the direction of air inlet and outlet;

[0046] The reference numerals in the figure are as follows: 1-Intake gap, 2-Intake channel, 3-First sealing ring, 4-Fixing component, 5-Second sealing ring, 6-Reset spring, 7-Third tube body;

[0047] 100-first tube body, 101-cavity;

[0048] 200-second tube body, 201-sealed cavity;

[0049] 300-Pipe plug, 301-Modible end, 302-Connecting end, 303-First sealing part, 304-Connecting screw hole, 305-Threaded hole, 306-Second sealing part, 307-Wire passage hole;

[0050] 400 - Slip ring, 401 - Connecting part, 402 - Through hole;

[0051] 500-Motor base, 501-Pushing part, 502-Extrusion part, 503-Sleeve hole, 504-Limiting hole, 505-Mounting hole, 506-Wire hole;

[0052] 600 - Limit bolt, 601 - Threaded part, 602 - Guide part, 603 - Limiting part;

[0053] 700 - Drive motor, 701 - Drive shaft, 702 - Threaded end;

[0054] 800 - Plug;

[0055] 900-Controller. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0057] To make the technical problem to be solved, the technical solution and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0058] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0059] Example 1

[0060] In this embodiment, refer to Figures 1-8 The electrically controlled pneumatic telescopic rod specifically implemented therein includes a first tube 100 and a second tube 200 movably inserted inside the first tube 100. The first tube 100 has a cavity 101 for inserting and accommodating the second tube 200. The first tube 100 and the second tube 200 are movably connected by a tube plug 300. The two ends of the tube plug 300 are respectively formed as a movable end 301 and a connecting end 302 for connecting the first tube 100 and the second tube 200. A sliding stop ring 400 for stopping and limiting the movable end 301 is connected to the end of the first tube 100 near the second tube 200.

[0061] The middle part of the sliding ring 400 is provided with a through hole 402 through which the second tube 200 can pass. An air intake gap 1 is left between the outer side of the second tube 200 and the inner side of the through hole 402. The movable end 301 is inserted into the cavity 101, and an air intake channel 2 is left between the outer side of the movable end 301 and the inner wall of the first tube 100. When the air intake gap 1 and the air intake channel 2 are connected, the gas content in the cavity 101 can be filled or squeezed out. The end of the movable end 301 extending into the cavity 101 is provided with a first sealing part 303. A first sealing ring 3 for sealing and isolating the air intake channel 2 and the cavity 101 is sleeved on the first sealing part 303.

[0062] A motor base 500 is connected to the movable end 301 by a limiting bolt 600. The motor base 500 includes a pushing part 501 and a pressing part 502. The pressing part 502 extends toward the first sealing ring 3, and the pressing part 502 has a sleeve hole 503 that matches the first sealing part 303. The limiting bolt 600 can provide radial limiting to the motor base 500, so that the motor base 500 can move up and down along the axial direction. A drive motor 700 is connected to the motor base 500 by a fixing member 4. The drive shaft 701 of the drive motor 700 passes through the motor base 500 and is screwed to the pipe plug 300.

[0063] When the drive motor 700 rotates and pushes the motor base 500 to move closer to the tube plug 300, the sleeve hole 503 of the motor base 500 mates with the first sealing part 303, and applies pressure to the first sealing ring 3 through the extrusion part 502, so that the first sealing ring 3 is compressed and expands radially to stick to the inner wall of the first tube body 100 to seal the cavity 101, and the tube plug 300 forms a locking position, which is the locked state at this time.

[0064] When the drive motor 700 rotates and drives the motor base 500 to move away from the pipe plug 300, the sleeve hole 503 of the motor base 500 disengages from the first sealing part 303, the squeezing part 502 moves away from the first sealing ring 3, so that the first sealing ring 3 regains its elasticity, the air intake channel 2 communicates with the cavity 101, and the pipe plug 300 and the second pipe body 200 can slide along the cavity 101. At this time, it is in the unlocked state.

[0065] Specifically, a sealed cavity 201 is formed inside the second tube 200, and both the first tube 100 and the second tube 200 are made of hollow tubes.

[0066] In some embodiments, the pipe body is provided with multiple sections as needed. For example, a two-section pipe includes a first pipe body 100 and a second pipe body 200, and a three-section pipe includes a third pipe body 7. Thus, a two-section telescopic rod, a three-section telescopic rod, etc., can be provided according to usage requirements.

[0067] The end of the first tube 100 away from the second tube 200 is the sealing end. Specifically, in this embodiment, the sealing end is the sealing head. One end of the sliding ring 400 is the connecting part 401. The connecting part 401 is paired and connected to the end of the first tube 100 near the second tube 200. The inner diameter of the through hole 402 is smaller than the inner diameter of the cavity 101, and the outer diameter of the movable end 301 is larger than the inner diameter of the through hole 402.

[0068] By setting the distal end of the first tube 100 as a sealed end, and using the connecting part 401 of the sliding ring 400 to match and connect with the end of the first tube 100, while limiting the inner diameter of the through hole 402 to be smaller than the inner diameter of the cavity 101 and the outer diameter of the movable end 301 to be larger than the inner diameter of the through hole 402, the sliding ring 400 can form an axial stop on the movable end 301, preventing the second tube 200 and the tube plug 300 from coming off the first tube 100 during the expansion and contraction process, so as to limit the safe expansion and contraction limit position.

[0069] The plug 300 has a connecting screw hole 304 for mating the limiting bolt 600. The motor base 500 has a limiting hole 504 concentric with the connecting screw hole 304. The limiting bolt 600 includes a threaded portion 601 and a guide portion 602, so that the limiting bolt 600 passes through the limiting hole 504 and is screwed into the connecting screw hole 304 through the threaded portion 601, and is mated with the limiting hole 504 through the guide portion 602. Under the circumferential limitation of the limiting bolt 600, the motor base 500 can move axially.

[0070] The threaded portion 601 of the limiting bolt 600 is screwed into the connecting screw hole 304 of the pipe plug 300, while the guide portion 602 cooperates with the limiting hole 504 of the motor base 500 to provide circumferential limiting and axial movement guidance for the motor base 500. This converts the rotational motion of the drive motor 700 into the linear reciprocating motion of the motor base 500 along the axial direction, preventing excessive deflection of the motor base 500 during movement. This ensures that the extrusion portion 502 applies uniform extrusion force to the first sealing ring 3, making the radial expansion of the first sealing ring 3 more consistent when it adheres to the inner wall of the first tube body 100. This improves the uniformity of the sealing of the cavity 101 and the stability of the locked state, further ensuring the accuracy and reliability of the electric control.

[0071] A limiting part 603 is provided at the end of the guide part 602 away from the tube plug 300, and a return spring 6 is provided between the limiting part 603 and the push part 501. The return spring 6 is used to provide the motor base 500 with an elastic force that always approaches and squeezes the first sealing ring 3.

[0072] By setting a limiting part 603 at the end of the guide part 602 and pressing a return spring 6 between the limiting part 603 and the pushing part 501, the return spring 6 can provide a continuous elastic thrust toward the tube plug 300 to the motor base 500 in the locked state, ensuring that the squeezing part 502 always presses the first sealing ring 3 tightly. Even if the drive motor 700 is de-energized or subjected to vibration, the first sealing ring 3 will still remain radially expanded and adhere tightly to the inner wall of the first tube body 100, thereby achieving a reliable seal for the cavity 101 and improving the stability and anti-vibration and anti-loosening ability of the telescopic rod locking.

[0073] The drive motor 700 is located on the top of the pusher 501. The fixing member 4 is made of screws, which pass through the pusher 501 and are connected and fixed to the drive motor 700. The pusher 501 has a mounting hole 505 for avoiding the drive shaft 701. The tube plug 300 has a threaded hole 305. One end of the drive shaft 701 extends into the threaded hole 305 and is threadedly connected to the threaded hole 305 through the threaded end 702, so that the rotation of the drive motor 700 can drive the motor base 500 to move up and down relative to the tube plug 300.

[0074] The drive motor 700 is fixed to the top of the push part 501 with screws, and the threaded end 702 of the drive shaft 701 is directly threaded to the threaded hole 305 of the pipe plug 300, forming a compact and direct transmission structure. When the drive motor 700 rotates, it can drive the motor base 500 to move axially, improving the response speed and displacement accuracy of locking and unlocking actions, making electric operation more sensitive, control more precise, and improving the convenience of operation.

[0075] Specifically, it is worth explaining that the helical rotation of the threaded end 702 of the drive shaft and the threaded hole 305 is limited by the circumferential rotation of the drive motor 700, which is fixed on the motor base 500 and limited by the limiting parts 603 of the two limiting bolts 600. This allows the motor base 500 to only perform axial lifting and lowering movements, that is, the rotational motion of the drive motor 700 is converted into linear motion.

[0076] The connecting end 302 is provided with a second sealing part 306, and a second sealing ring 5 for sealing is sleeved on the second sealing part 306.

[0077] A second sealing part 306 and a second sealing ring 5 are provided at the connecting end 302, which can effectively seal the gap between the connecting end 302 of the plug 300 and the inner wall of the second tube 200, ensuring the firmness and stability of the connection between the plug 300 and the second tube 200. At the same time, when the second tube 200 is connected to the third tube 7, the inner cavity of the second tube 200 can be filled with gas to prevent the gas from escaping from the inner cavity of the second tube 200. This avoids the pressure decay and locking force reduction caused by gas leakage in the locked state, thereby maintaining stable air pressure and reliable locking after a long period of locking. This improves the airtightness and continuous locking stability and reliability of the electric control pneumatic telescopic rod, and reduces the inconvenience of operation caused by air replenishment.

[0078] The plug 300 has a wire-passing hole 307 for threading a wire. A sealing plug 800 is fitted onto the wire. One end of the wire is electrically connected to the drive motor 700, and the other end is electrically connected to a controller 900 for controlling the forward or reverse rotation of the drive motor 700. The pusher 501 has a wire-passing hole 506 for threading a wire. The wire-passing hole 506 is provided to prevent the wire from passing through and exiting.

[0079] A wire passage hole 307 is opened on the pipe plug 300 and the wire is sealed with a plug 800. This ensures a reliable electrical connection to the drive motor 700 while maintaining airtightness at the wire passage point. It prevents gas leakage from the cavity 101 along the wire channel, which would affect the pneumatic drive and locking effect. The controller 900 controls the drive motor 700 to rotate forward and backward, replacing the manual pressing of the air valve. This achieves one-button electric unlocking and locking, eliminating the limitation of portability in manual control operation and improving the level of intelligence and ease of operation.

[0080] The specific operating principle in this embodiment is as follows:

[0081] When the drive motor 700 drives the motor base 500 to approach the tube plug 300, the extrusion part 502 extrudes the first sealing ring 3 to make it expand radially and stick to the inner wall of the first tube body 100, thereby sealing the cavity 101 and effectively preventing internal gas leakage, so that the second tube body 200 is locked relative to the first tube body 100, forming a stable and reliable locking state.

[0082] When the drive motor 700 drives the motor base 500 away from the tube plug 300, the extrusion part 502 disengages from the first sealing ring 3, the first sealing ring 3 regains its elasticity, the air inlet gap 1 connects with the air inlet channel 2, and the gas in the cavity 101 can be freely filled or squeezed out, so that the second tube 200 can slide smoothly along the cavity 101 to adjust the telescopic length.

[0083] By setting a pipe plug 300 with a first sealing ring 3 between the first pipe body 100 and the second pipe body 200, and configuring a motor seat 500 that can move axially driven by a drive motor 700, the compression part 502 of the motor seat 500 applies pressure or releases pressure to the first sealing ring 3. With the elastic recovery of the first sealing ring 3, the cavity 101 is sealed and locked, and the connection with the air intake channel 2 is unlocked. The operation of manually pressing the air valve is replaced by electric drive, eliminating the defects of limited portability of manual control operation. Intelligent electric control of the connection with the air intake channel 2 is realized. The operator can complete the locking and unlocking of the telescopic rod without manually pressing the air valve, which significantly improves the convenience of operation and user experience.

[0084] An electric valve control method includes electrically controlling a pneumatic telescopic rod. A controller 900 is equipped with forward / reverse buttons. This control method includes:

[0085] S101, when the reverse button of the controller 900 is pressed, the drive motor 700 rotates in the reverse direction along the threaded hole 305 through the threaded end 702 of the drive shaft 701. The motor base 500 is fixedly connected to the motor base 500, converting the rotational motion of the drive motor 700 into linear reciprocating motion, causing the motor base 500 to slide axially away from the tube plug 300 and overcome the elastic force of the return spring 6. The first sealing ring 3 restores its elastic force, and the cavity 101 is interconnected with the air intake channel 2 and the air intake gap 1. The second tube 200 can extend and retract along the cavity 101. At the same time, gas can enter the cavity 101 through the air intake channel 2 from the air intake gap 1 to fill or be squeezed out, so as to control the extension and retraction length. At this time, it is the unlocked sliding extension and retraction state.

[0086] S102, when the forward rotation button of the controller 900 is pressed, the drive motor 700 rotates forward along the threaded hole 305 through the threaded end 702 of the drive shaft 701. The motor base 500 is fixedly connected to the motor base 300. At the same time, due to the circumferential limitation of the limit bolt 600, the forward rotation of the drive motor 700 can push the motor base 500 to move closer to the tube plug 300. The sleeve hole 503 of the motor base 500 is paired with the first sealing part 303, and the compression part 502 applies compression to the first sealing ring 3, so that the first sealing ring 3 expands radially and adheres to the inner wall of the first tube body 100 and forms a seal on the cavity 101 to seal the filling gas in the cavity 101. The motor base 500 presses the tube plug 300 to form a locking position. The second return spring 6 restores its elastic force and provides the motor base 500 with a continuous pressing force on the first sealing ring 3. At this time, it is in the locked state.

[0087] Example 2

[0088] In this embodiment, refer to Figure 9 and Figure 10 The difference between this second embodiment and the first embodiment is that a third tube 7 is detachably provided at the end of the second tube 200 away from the first tube 100, and a tube plug 300 is provided between the third tube 7 and the second tube 200, so that the third tube 7 can slide along the sealing cavity 201 of the second tube 200.

[0089] Specifically, in this embodiment, the first tube 100, the second tube 200, and the third tube 7 are combined to form a monopod for a camera device.

[0090] By forming a sealed cavity 201 inside the second tube 200 and adding a detachable third tube 7 and a tube plug 300, the electric locking and pneumatic telescopic principle is extended to a multi-stage telescopic tube or a multi-section telescopic tube structure. Without increasing the length of a single tube section, the total stroke and adjustable range of the telescopic rod can be expanded through a multi-section telescopic tube. The third tube 7 can also achieve stable locking and smooth telescopic extension and retraction through an electric pneumatic mechanism, enhancing the product's adaptability to different usage scenarios and improving the flexibility of use.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. An electrically controlled gas pressure telescopic rod comprising a first tube and a second tube movably disposed within the first tube, characterized in that: The first tube has an internal cavity for receiving and accommodating the second tube. The first tube and the second tube are movably connected by a tube plug. The two ends of the tube plug are respectively formed as a movable end and a connecting end for connecting the first tube and the second tube. A sliding stop ring is connected to the end of the first tube near the second tube for stopping and limiting the movable end. The end of the first tube body away from the second tube body is the sealing end, and one end of the slip ring is the connecting part, which is paired and connected to the end of the first tube body near the second tube body; The middle part of the sliding ring has a through hole through which the second tube can pass. An air intake gap is left between the outer side of the second tube and the inner side of the through hole. The movable end passes into the cavity, and the outer side of the movable end and the inner wall of the first tube have an air intake channel. When the air intake gap and the air intake channel are connected, the gas content in the cavity can be filled or squeezed out. The end of the movable end extending into the cavity has a first sealing part. A first sealing ring for sealing and isolating the air intake channel and the cavity is fitted on the first sealing part. A motor base is connected to the movable end by a limiting bolt. The motor base includes a pushing part and a pressing part. The pressing part extends toward the first sealing ring and has a sleeve hole that matches the first sealing part. The limiting bolt can provide radial limiting to the motor base, so that the motor base can move up and down along the axial direction. A drive motor is connected to the motor base by a fixing member. The drive shaft of the drive motor passes through the motor base and is screwed to the pipe plug. The plug has a connecting screw hole for mating limit bolts, and the motor base has a limit hole concentric with the connecting screw hole. The limit bolt includes a threaded part and a guide part, so that the limit bolt passes through the limit hole and is screwed to the connecting screw hole through the threaded part, and is mated to the limit hole through the guide part. Under the circumferential limitation of the limit bolt, the motor base can move axially. When the drive motor rotates and pushes the motor seat to move closer to the tube plug, the sleeve hole of the motor seat matches the first sealing part, and the extrusion part applies pressure to the first sealing ring, causing the first sealing ring to be compressed and radially expanded to fit tightly against the inner wall of the first tube body to seal the cavity, and the tube plug forms a locking position, which is the locked state at this time. When the drive motor rotates and moves the motor base away from the pipe plug, the sleeve hole of the motor base disengages from the first sealing part, the squeezing part moves away from the first sealing ring, the first sealing ring regains its elasticity, the air intake channel communicates with the cavity, and the pipe plug and the second pipe body can slide along the cavity. At this time, it is in the unlocked state.

2. The electrically controlled pneumatic telescopic rod according to claim 1, characterized in that: The inner diameter of the through hole is smaller than the inner diameter of the cavity, and the outer diameter of the movable end is larger than the inner diameter of the through hole.

3. The electrically controlled pneumatic telescopic rod according to claim 1, characterized in that: The guide portion is provided with a limiting portion at its end away from the tube plug, and a return spring is provided that is pressed between the limiting portion and the pushing portion. The return spring is used to provide the motor base with an elastic force that always approaches and squeezes the first sealing ring.

4. The electrically controlled pneumatic telescopic rod according to claim 3, characterized in that: The drive motor is located on the top of the pusher. The fixing component is made of screws, which pass through the pusher and are connected and fixed to the drive motor. The pusher has a mounting hole for avoiding the drive shaft, and the tube plug has a threaded hole. One end of the drive shaft extends into the threaded hole and is threadedly connected to the threaded hole through the threaded end, so that the rotation of the drive motor can drive the motor seat to move relative to the tube plug.

5. The electrically controlled pneumatic telescopic rod according to claim 1, characterized in that: The connecting end is provided with a second sealing part, and a second sealing ring for sealing is fitted on the second sealing part.

6. The electrically controlled pneumatic telescopic rod according to claim 5, characterized in that: The interior of the second tube forms a sealed cavity, and a third tube is detachably provided at the end of the second tube away from the first tube. A tube plug is provided between the third tube and the second tube, so that the third tube can slide along the sealed cavity of the second tube.

7. The electrically controlled pneumatic telescopic rod according to any one of claims 1-6, characterized in that: The tube plug has a through hole for threading a wire, and a sealing plug is fitted onto the wire. One end of the wire is electrically connected to the drive motor, and the other end of the wire is electrically connected to a controller for controlling the forward or reverse rotation of the drive motor.

8. The electrically controlled pneumatic telescopic rod according to claim 7, characterized in that: The pushing part has a threading hole for threading a wire.

9. An electric valve control method, comprising the electric control pneumatic telescopic rod of any one of claims 1-8, wherein the controller is provided with a forward / reverse button, characterized in that, The control method includes: S101, when the reverse button of the controller is pressed, the drive motor rotates in the opposite direction along the threaded hole through the threaded end of the drive shaft. The motor base is fixedly connected to the motor base, converting the rotational motion of the drive motor into linear reciprocating motion, causing the motor base to slide axially away from the tube plug and overcome the elastic force of the return spring. The first sealing ring restores its elastic force, and the cavity is connected to the air intake channel and the air intake gap. The second tube can move along the cavity. At the same time, gas can pass through the air intake gap and the air intake channel into the cavity to fill or be squeezed out, so as to control the extension length. At this time, it is the unlocked sliding extension state. S102, when the forward rotation button of the controller is pressed, the drive motor rotates forward along the threaded hole through the threaded end of the drive shaft. The motor base is fixedly connected to the motor base. At the same time, due to the circumferential limitation of the limit bolt, the forward rotation of the drive motor can push the motor base to move closer to the tube plug. The sleeve hole of the motor base matches the first sealing part and applies pressure to the first sealing ring through the extrusion part, so that the first sealing ring expands radially and adheres to the inner wall of the first tube body to form a seal for the cavity, thereby sealing the filling gas in the cavity. The motor base presses the tube plug to form a locking position. The second return spring restores its elastic force and provides the motor base with a continuous elastic force to press the first sealing ring. At this time, it is in the locked state.

Images