Electric control locking structure and electric control locking telescopic rod

Abstract

The utility model relates to the field of locking structures, in particular to an electric control locking structure and an electric control locking telescopic rod, which comprise a fixed seat, a transmission piece and an electric control piece, the transmission piece and the electric control piece are arranged on the fixed seat, a rotatable rotating piece is arranged on the transmission piece, and a wedge block capable of lifting along the axial direction of the rotating piece is connected onto the rotating piece. According to the utility model, the wedge block is driven by the rotation of the rotating piece to lift and slide, so that the wedge block can drive the locking piece to extrude and open towards the outer side of the fixed seat or to contract and close towards the center of the fixed seat; therefore, the locking action can be carried out through opening of the locking piece, the unlocking action can be carried out through closing of the locking piece, efficient and reliable operation of the locking structure can be achieved through a precise mechanical structure and electrical control, the accuracy and stability of the locking or unlocking action are improved, and compared with a hydraulic structure, the structure is more stable and lower in failure rate.

Description

Technical Field

[0001] This utility model relates to the field of locking structures, specifically to an electrically controlled locking structure and an electrically controlled locking telescopic rod. Background Technology

[0002] Telescopic mechanisms have a wide range of applications in daily life and industrial production, and locking structures play a crucial role in various telescopic mechanisms. These include, but are not limited to, fishing rods, construction (such as surveying scaffolds), the automotive industry, the manufacturing industry, performance props, sports equipment, and photographic equipment (such as tripods and monopods). The telescopic characteristics of telescopic mechanisms allow them to be adjusted to stretch or retract to the required length as needed. Therefore, these telescopic mechanisms usually require locking structures for quick locking, enabling convenient use and adjustment according to actual needs.

[0003] Existing telescopic mechanisms employ various locking and unlocking methods, primarily including manual latch locking, manual threaded locking, and hydraulic locking. In manual latch locking, the closing of an external latch deforms the outer larger tube, compressing the inner smaller tube to achieve locking. In manual threaded locking, the external threading deforms the outer larger tube, compressing the inner smaller tube to achieve locking. In hydraulic locking, a handle controls a hydraulic device built into the tube, which compresses a friction element against the inner wall of the larger tube to achieve locking. These different locking structures cater to various application requirements.

[0004] However, although existing locking structures are widely used in telescopic mechanisms, they still have some defects and shortcomings. The existing manual locking method is complex to operate, requiring users to perform multiple operations or apply a lot of force to complete locking and unlocking. This not only increases the difficulty of operation for users, but also reduces the efficiency of the locking structure. The existing hydraulic locking method can achieve one-button opening and closing action, and its drive control effect is high. However, the hydraulic device in the hydraulic locking method is prone to leakage, resulting in difficulty in locking and a high failure rate, which affects the stable control and use of the locking structure. Moreover, the control structure of hydraulic locking is expensive to manufacture, which is not conducive to its widespread use. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned defects by providing an electrically controlled locking structure and an electrically controlled locking telescopic rod, so as to solve the technical problems of low control efficiency, difficulty in quick locking or unlocking, and impact on the efficiency of use of existing locking structures in the background art.

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

[0007] An electrically controlled locking structure includes a fixed base, a transmission component mounted on the fixed base, and an electrical control device for driving the transmission component to rotate. The transmission component is equipped with a rotatable rotating component, and a wedge block that can move up and down along the axial direction of the rotating component is connected to the rotating component. A locking component that can open and close in the radial direction is connected to the outside of the wedge block. A cover plate is connected to the bottom of the fixed base, and the locking component is located between the fixed base and the cover plate.

[0008] When the transmission component drives the rotating component to rotate, the wedge block moves up and down and slides under the rotation of the rotating component. This allows the wedge block to push the locking component outward or contract towards the center of the fixed seat. Thus, the locking action can be performed by opening the locking component and the unlocking action can be performed by closing the locking component.

[0009] Furthermore, as described above, the outer side of the wedge block is provided with an inclined wedge connecting portion, and the locking member is provided with a wedge mounting portion that is paired with the wedge connecting portion. The lifting and lowering movement of the wedge block causes the inclined wedge connecting portion to drive the locking member to open and close. The fixed base is provided with a limiting guide groove for mates with the wedge block, and the outer side of the wedge block is provided with a wedge guide portion that is paired with the limiting guide groove.

[0010] Optionally, in some embodiments, multiple wedge-tightening connections are provided, allowing for the pairing and connection of multiple locking elements. Each locking element has a connecting groove on which a spring is installed. The spring helps to increase the locking friction of the locking elements, thereby improving the stability and reliability of the locking mechanism.

[0011] The wedge-tightening connection and the wedge-tightening mounting part are wedge-tightened together, so that the wedge-tightening block can drive the locking part to squeeze open or contract and close during the lifting and lowering movement. This can control the tension and locking of the locking part and the external fixing part, and improve the stability and reliability of control and locking.

[0012] Optionally, in some embodiments, the wedge-tightening connection portion and the wedge-tightening mounting portion are plugged into each other, the wedge-tightening connection portion is a wedge-tightening connection protrusion or a wedge-tightening connection groove, and the wedge-tightening mounting portion is provided with a wedge-tightening mounting groove or a wedge-tightening mounting protrusion that matches the wedge-tightening connection protrusion or the wedge-tightening connection groove.

[0013] Furthermore, as described above, the outer surface of the wedge block is inclined, so that the wedge block is shaped like a frustum, such as a triangular frustum, a quadrangular frustum, or a pentagonal frustum.

[0014] Furthermore, as described above, the bottom of the fixed base has two or more protruding limiting blocks, and a movable guide groove for mating and installing the locking member is formed between the two limiting blocks, so that the locking member can move open and close along the movable guide groove, and a friction surface for friction locking is formed on the outer side of the locking member.

[0015] Furthermore, as described above, the limiting block is provided with a connecting hole, and the cover plate is connected and installed to the connecting hole by screws.

[0016] The inner side of the locking element is paired with the wedge block, and the outer side of the locking element passes through the moving guide groove. The locking element is set between the fixed seat and the cover plate. The cover plate and the limiting block prevent the locking element from moving up and down, ensuring that the locking element only moves in the radial expansion or contraction direction, thereby ensuring the stable movement of the locking element and the locking or unlocking control.

[0017] By enhancing the friction force when in contact with external fasteners through the design of friction surfaces, the locking mechanism can be ensured to lock onto the external fasteners.

[0018] Furthermore, as described above, one end of the rotating component is connected to the transmission component, and the other end of the rotating component has a threaded portion. The wedge block is provided with a threaded hole that is matched and connected to the threaded portion. When the rotating component rotates, the wedge block can rotate along the threaded portion of the rotating component through the threaded hole and move axially.

[0019] The wedge block is paired with the limiting guide groove of the fixed seat, so that the wedge block can slide along the limiting guide groove. The threaded part of the rotating part is threadedly connected to the threaded hole of the wedge block. When the rotating part rotates, the wedge block can be adjusted up and down along the limiting guide groove through the threaded hole, so that the locking part can be expanded or contracted under the up and down movement of the wedge block.

[0020] Furthermore, as described above, a friction plate is adhered to the friction surface.

[0021] The stability and firmness of the friction locking between the locking component and the external fastener are further enhanced by bonding friction pads.

[0022] Furthermore, as described above, the electrical control system includes a drive motor and a controller. The drive motor is mounted on a fixed base, and its drive shaft is connected to a transmission component. The controller is electrically connected to the drive motor via a wire, and it is equipped with a control button for controlling the rotation of the drive motor.

[0023] The controller adjusts the positive and negative terminals of the power supply to output current in opposite directions, thereby controlling the forward and reverse rotation of the drive motor. This forward and reverse rotation of the drive motor, through a transmission mechanism, drives a locking mechanism to achieve locking and unlocking. Specifically, the transmission mechanism drives a rotating component to rotate, which in turn controls the raising and lowering of the wedge block and causes the locking mechanism to open or close. Setting the drive motor's direction allows for precise control of the locking speed and force of the locking mechanism, and the controller can adjust the friction between the locking mechanism and the external fixing component during locking.

[0024] Furthermore, the control buttons consist of a main forward and reverse button, and forward / reverse buttons for each drive motor. The controller can have a built-in power supply and an external power supply, allowing it to control the locking or unlocking action by pressing the corresponding drive motor or the main forward / reverse button.

[0025] Furthermore, as described above, the transmission component includes a drive gear and a gear set. The drive gear is coaxially connected to the drive shaft of the drive motor. The gear set is mounted on a fixed base, and one end of the gear set is meshed with the drive gear. The gear set is provided with a driven gear that is connected to the rotating component.

[0026] The rotation of the gear set driven by the drive gear and the rotation of the driven gear can be effectively controlled, thereby controlling the locking force or speed of the locking element.

[0027] Furthermore, as described above, the fixed base is provided with an end cover, which covers the transmission component on the fixed base, positioning the transmission component between the fixed base and the end cover. The drive motor is mounted on the end cover. The end cover serves to waterproof and dustproof the transmission component.

[0028] An electrically controlled locking telescopic rod includes an inner tube, an outer tube, and an electrically controlled locking structure. Both the inner tube and the outer tube are made of hollow tubes. The inner tube passes through the outer tube and can slide along the axial direction of the outer tube. One end of the inner tube near the outer tube is connected to a fixed seat. The end of the fixed seat connected to the locking element is exposed outside the inner tube.

[0029] In the locked state, when the control unit drives the rotating part to rotate through the transmission component, the wedge block moves towards the inner tube under the drive of the rotating part, and drives the locking part to be squeezed and opened towards the outside of the fixed seat, so that the outer side of the locking part is rubbed and tightened against the inner wall of the outer tube, thereby completing the locking action between the inner tube and the outer tube.

[0030] In the unlocked state, when the electronic control unit drives the rotating component to rotate through the transmission component, the wedge block moves towards the outer tube under the drive of the rotating component, and drives the locking component to retract and close towards the center of the fixed seat, so that the outer side of the locking component separates from the inner wall of the outer tube, thereby completing the locking action between the inner tube and the outer tube.

[0031] In the locked state, the friction surface of the locking element presses against the inner wall of the outer tube, thereby generating friction between the locking element and the inner wall of the outer tube, which locks the inner tube and the outer tube. Conversely, in the unlocked state, the friction surface of the locking element disengages from the inner wall of the outer tube, which unlocks the inner tube and the outer tube.

[0032] Furthermore, as described above, one end of the outer tube is provided with a limiting end or limiting screw sleeve to prevent the inner tube from slipping out of the outer tube. The limiting end or limiting screw sleeve can be used to hold and limit the inner tube, preventing the inner tube from being stretched and slipping directly out of the outer tube.

[0033] The beneficial effects of this utility model are:

[0034] 1. The transmission component is driven to rotate by an electrical control system, which in turn drives the rotating component to rotate. The wedge block can move up and down under the rotation of the rotating component. The up and down movement of the wedge block further drives the locking component to open and close radially. The electrical control system allows the locking component to tightly fit or release the locked object, enabling the locking structure to respond quickly and control precisely, ensuring the reliability of locking and the smoothness of unlocking. This makes locking and unlocking more direct and efficient, improving the convenience and automation of operation. The locking action is achieved by opening the locking component or the unlocking action is achieved by retracting it, improving the flexibility and applicability of the locking structure. This utility model achieves efficient and reliable operation of the locking structure through a combination of precise mechanical design and electrical control. The synergistic effect between its components not only improves the accuracy and stability of the locking action but also extends the service life and reduces maintenance costs. At the same time, the structure of this solution has low manufacturing cost and has significant technical advantages and market value.

[0035] 2. The inner tube passes inside the outer tube and can slide along the axial direction of the outer tube, thus enabling the inner and outer tubes to extend and retract. The relative movement of the inner and outer tubes allows for flexible length adjustment. The end of the inner tube closest to the outer tube is connected to a fixed base. The end of the fixed base with a locking element is exposed outside the inner tube. When the inner tube is stretched to the required length, the locking element is radially opened by an electronic control, causing its friction surface to contact the inner wall of the outer tube. This achieves effective friction and tension locking, reducing the slippage and loosening of the inner tube under external force, and ensuring the stability of the telescopic rod. The stability of the inner and outer tubes is ensured. Conversely, after the friction surface of the locking component disengages from the inner wall of the outer tube, the inner and outer tubes can be re-stretched and adjusted. The set electronic control device realizes the automatic control and adjustment of locking and unlocking actions. At the same time, it improves the convenience and accuracy of telescopic rod telescopic locking operation. This utility model sets the electronic locking structure on the inner and outer tubes of the telescopic rod, which can realize efficient and reliable locking and unlocking actions of telescopic rod expansion and contraction. Moreover, this structure has lower manufacturing cost and failure rate than hydraulic locking telescopic rods and has wide applicability. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the electronically controlled locking structure in the first direction of this embodiment;

[0037] Figure 2 This is a schematic diagram of the overall structure of the electronically controlled locking structure in the second direction of this embodiment;

[0038] Figure 3 This is a top-view exploded structural diagram of the electrically controlled locking structure in this embodiment;

[0039] Figure 4 This is an exploded view of the electrically controlled locking structure in this embodiment from a low angle.

[0040] Figure 5 This is a schematic diagram of the connection structure between the wedge block and the locking element in this embodiment;

[0041] Figure 6 This is a schematic diagram of the connection structure between the locking element and the friction plate in this embodiment;

[0042] Figure 7 This is a schematic diagram of the installation of the transmission components in this embodiment;

[0043] Figure 8 This is a schematic diagram of the overall structure of the electrically controlled locking telescopic rod in this embodiment;

[0044] Figure 9 This is a cross-sectional view of the connection structure of the electrically controlled locking telescopic rod in this embodiment;

[0045] Figure 10 This is a schematic diagram of the connection structure between the fixed base and the inner tube in this embodiment;

[0046] Figure 11 This is a schematic diagram of the overall structure of the monopod in this embodiment two;

[0047] Figure 12 This is a schematic diagram of the internal connection structure of the monopod in Embodiment 2.

[0048] Figure 13 This is a schematic diagram of the overall structure of the tripod in Embodiment 3;

[0049] Figure 14 This is a schematic diagram of the internal connection structure of the tripod in Embodiment 3;

[0050] The reference numerals in the figure are as follows: 100-fixed base, 101-limiting block, 102-moving guide groove, 103-limiting guide groove, 104-connecting hole, 105-threading hole, 106-connecting end; 200-transmission component, 201-drive gear, 202-gear set, 203-driven gear, 204-rotating component, 205-threaded part; 300-electrical control component, 301-drive motor, 302-controller, 303-control button, 3 04-Wire; 400-Wedge block, 401-Wedge connection, 402-Wedge guide, 403-Threaded hole; 500-Locking part, 501-Wedge mounting part, 502-Connecting groove, 503-Friction surface; 600-Cover plate, 700-Spring, 800-Friction pad, 900-End cap; 10A-Inner tube, 20B-Outer tube, 30C-Limiting screw sleeve, 40D-Support bracket, 50E-Mounting base, 60F-Support base. Detailed Implementation

[0051] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0052] Example 1, this example refers to... Figures 1-10 The specific implementation of the electronically controlled locking structure includes a fixed base 100, a transmission component 200 disposed on the fixed base 100, and an electronic control component 300 for driving the transmission component 200 to rotate. The transmission component 200 is provided with a rotatable rotating component 204. A wedge block 400 that can move up and down along the axial direction of the rotating component 204 is connected to the rotating component 204. A locking component 500 that can open and close along the radial direction is connected to the outside of the wedge block 400. A cover plate 600 is connected to the bottom of the fixed base 100. The locking component 500 is disposed between the fixed base 100 and the cover plate 600.

[0053] When the transmission component 200 drives the rotating component 204 to rotate, the wedge block 400 moves up and down and slides under the rotation of the rotating component 204, so that the wedge block 400 can drive the locking component 500 to squeeze and open to the outside of the fixed seat 100 or to contract and close to the center of the fixed seat 100. Thus, the locking action can be performed by opening the locking component 500, and the unlocking action can be performed by closing the locking component 500.

[0054] Specifically, refer to Figures 3-5 In this embodiment, the outer surface of the wedge block 400 is inclined, and the wedge block 400 is shaped like a truncated pyramid, narrower at the top and wider at the bottom. An inclined, protruding wedge-tightening connecting portion 401 is formed on the outer side of the wedge block 400. The locking member 500 is provided with a wedge-tightening mounting portion 501 that is paired with the wedge-tightening connecting portion 401. The wedge-tightening mounting portion 501 is configured as a slot for insertion and mating with the wedge-tightening connecting portion 401. The lifting and lowering movement of the wedge block 400 causes the inclined wedge-tightening connecting portion 401 to drive the locking member 500 to open and close. The fixing base 100 is formed with limiting guide grooves 103 for mating with the four corners of the wedge block 400. The limiting guide grooves 103 are located inside the limiting protrusions. Wedge-tightening guide portions 402 are formed at the four corners of the wedge block 400 that are paired with the limiting guide grooves 103, allowing the wedge block 400 to slide along the limiting guide grooves 103.

[0055] In this embodiment, refer to Figure 4 and Figure 5 The wedge-tightening connection 401 is provided with four parts, which can be paired to connect four locking parts 500. Each locking part 500 has a connecting groove 502, and a spring 700 for connecting each locking part 500 is installed on the connecting groove 502. The spring 700 helps to increase the locking friction of the locking part 500, thereby improving the stability and reliability of the locking of the locking part 500.

[0056] Optionally, in some embodiments, the wedge-tightening connection portion 401 and the wedge-tightening mounting portion 501 are plugged into each other. The wedge-tightening connection portion 401 is an outwardly protruding wedge-tightening connection protrusion or an inwardly recessed wedge-tightening connection groove. The wedge-tightening mounting portion 501 is a wedge-tightening mounting groove or a wedge-tightening mounting protrusion that is matched with the wedge-tightening connection protrusion or the wedge-tightening connection groove.

[0057] The wedge-tightening connection 401 and the wedge-tightening mounting part 501 are wedge-tightened together, so that when the wedge-tightening block 400 moves up and down, the wedge-tightening connection 401 drives the locking member 500 to squeeze open or contract and close. That is, when the wedge-tightening block 400 rises, its wider bottom end moves upward and squeezes the locking member 500, thereby controlling the tension and locking of the locking member 500 with the external fixing member, improving the stability and reliability of control and locking.

[0058] Specifically, refer to Figure 4 and Figure 5 In this embodiment, the bottom of the fixing base 100 has four protruding limiting blocks 101. A movable guide groove 102 for mating and installing the locking member 500 is formed between two adjacent limiting blocks 101, allowing the locking member 500 to open and close along the movable guide groove 102. A friction surface 503 for friction locking is formed on the outer surface of the locking member 500. A connecting hole 104 is provided on the limiting block 101, and the cover plate 600 is connected to the connecting hole 104 by screws. A through-hole 105 is provided on the fixing base 100, and a connecting end 106 is formed at the end of the fixing base 100 away from the limiting block 101.

[0059] The inner side of the locking member 500 is paired with the wedge block 400, and the outer side of the locking member 500 passes through the moving guide groove 102. The locking member 500 is located between the fixed base 100 and the cover plate 600. The cover plate 600 and the limiting block 101 prevent the locking member 500 from moving up and down, ensuring that the locking member 500 only moves in the radial expansion or contraction direction, thereby ensuring the stable movement of the locking member 500 and the locking or unlocking control.

[0060] The friction surface 503 enhances the frictional force when in contact with the external fastener, thereby ensuring that the locking member 500 is locked to the external fastener.

[0061] Optionally, in some embodiments, reference is made to Figure 6 Friction plates 800 are bonded to the friction surface 503. Bonding the friction plates 800 further enhances the stability and firmness of the frictional locking between the locking member 500 and the external fixing member. Optionally, the friction plates 800 are paired according to the number of locking members 500, and different specifications or models of friction plates 800 can be selected according to the magnitude of the frictional force required for locking with the external fixing member.

[0062] Specifically, refer to Figures 3-5 In this embodiment, one end of the rotating member 204 is connected to the transmission member 200, and the other end of the rotating member 204 has a threaded portion 205. The wedge block 400 is provided with a threaded hole 403 that is matched and connected to the threaded portion 205. When the rotating member 204 rotates, the wedge block 400 can rotate and move axially along the threaded portion 205 of the rotating member 204 through the threaded hole 403. The four corners of the wedge block 400 are matched and installed with the limiting guide groove 103 of the fixed seat 100, so that the wedge block 400 can slide along the limiting guide groove 103. The threaded portion 205 of the rotating member 204 is threadedly connected to the threaded hole 403 of the wedge block 400. When the rotating member 204 rotates, the wedge block 400 can be adjusted up and down along the limiting guide groove 103 through the threaded hole 403, so that the locking member 500 can be expanded or contracted under the up and down movement of the wedge block 400.

[0063] Specifically, the threaded portion 205 of the rotating part 204 is paired with the threaded hole 403 of the wedge block 400. When the wedge block 400 is limited by the limiting guide groove 103, the principle of converting the rotation of the wedge block 400 into linear motion is used. The specific action process is a conventional technical means and will not be described in detail here.

[0064] Specifically, refer to Figure 1 In this embodiment, the electrical control 300 includes a drive motor 301 and a controller 302. The drive motor 301 is mounted on the fixed base 100 or the end cover 900, and the drive shaft of the drive motor 301 is connected to the transmission component 200. The controller 302 is electrically connected to the drive motor 301 through a wire 304, and the controller 302 is provided with a control button 303 for controlling the rotation of the drive motor 301.

[0065] Specifically, in this embodiment, an end cover 900 is provided on the fixed base 100. The end cover 900 covers the transmission component 200 on the fixed base 100, so that the transmission component 200 is disposed between the fixed base 100 and the end cover 900. The drive motor 301 is mounted on the end cover 900. The transmission component 200 is mounted between the fixed base 100 and the end cover 900, and the drive motor 301 is mounted on the fixed base 100 or the end cover 900. The end cover 900 assists in the mounting of the drive motor 301. At the same time, the end cover 900 can also provide waterproof and dustproof protection for the transmission component 200.

[0066] The controller 302 adjusts the positive and negative terminals of the power supply to output current in the positive and negative directions, thereby controlling the forward and reverse rotation of the drive motor 301. The forward and reverse rotation of the drive motor 301 drives the locking member 500 via the transmission component 200, achieving locking and unlocking. Specifically, the transmission component 200 drives the rotating component 204 to rotate, which in turn controls the raising and lowering of the wedge block 400 and causes the locking member 500 to open or close. Setting the drive motor 301 allows for precise control of the locking speed and force of the locking member 500, thus allowing the controller 302 to regulate the friction between the locking member 500 and the external fixing component during locking.

[0067] In some embodiments, the control button 303 consists of a general forward and reverse button, and forward / reverse buttons for each drive motor 301. The controller 302 may have a built-in power supply and an external power supply, so that it can control the locking or unlocking action by pressing the corresponding drive motor 301 or the general forward / reverse button.

[0068] Specifically, refer to Figures 3-7 In this embodiment, the transmission component 200 includes a drive gear 201 and a gear set 202. The drive gear 201 is coaxially connected to the drive shaft of the drive motor 301. The gear set 202 is mounted on the fixed base 100, and one end of the gear set 202 is meshed with the drive gear 201. The gear set 202 is provided with a driven gear 203 that is connected to the rotating component 204. The drive gear 201 drives the gear set 201 to rotate, which in turn drives the driven gear 203 to rotate. This allows for effective control of the rotation of the rotating component 204, thereby controlling the locking force or speed of the locking component 500.

[0069] Reference Figures 1-10 The electrically controlled locking telescopic rod specifically implemented therein includes an inner tube 10A, an outer tube 20B and an electrically controlled locking structure. Both the inner tube 10A and the outer tube 20B are made of hollow tubes. The inner tube 10A passes through the outer tube 20B and can slide along the axial direction of the outer tube 20B. One end of the inner tube 10A near the outer tube 20B is threadedly connected to the connecting end 106 of the fixing seat 100. The end of the fixing seat 100 connected to the locking member 500 is exposed outside the inner tube 10A.

[0070] In the locked state, when the drive motor 301 drives the rotating component 204 to rotate through the transmission component 200, the wedge block 400 moves towards the inner tube 10A under the drive of the rotating component 204, and drives the locking component 500 to be squeezed open towards the outside of the fixed seat 100, so that the outer side of the locking component 500 is rubbed and tightened against the inner wall of the outer tube 20B, thus completing the locking action between the inner tube 10A and the outer tube 20B.

[0071] In the unlocked state, when the control unit 300 drives the rotating member 204 to rotate via the transmission member 200, the wedge block 400 moves towards the outer tube 20B under the drive of the rotating member 204, and drives the locking member 500 to retract and close towards the center of the fixed seat 100, so that the outer side of the locking member 500 disengages from the inner wall of the outer tube 20B, thereby completing the locking action between the inner tube 10A and the outer tube 20B.

[0072] Optionally, in some embodiments, an outer tube 20B is included as a base tube, and the inner tube 10A is composed of multiple telescopic connecting tubes, so that multiple telescopic connecting tubes can be connected according to actual use needs, and a set of electrically controlled locking structures are connected to the joint end of each telescopic inner tube 10A, so that the electrically controlled locking structures can lock the multiple inner tubes 10A when they are stretched or contracted.

[0073] Specifically, in the locked state, the friction surface 503 of the locking member 500 presses against the inner wall of the outer tube 20B, causing friction between the locking member 500 and the inner wall of the outer tube 20B, thereby locking the inner tube 10A and the outer tube 20B. Conversely, in the unlocked state, the friction surface 503 of the locking member 500 disengages from the inner wall of the outer tube 20B, thereby unlocking the inner tube 10A and the outer tube 20B.

[0074] Specifically, in this embodiment, one end of the outer tube 20B is provided with a limiting screw sleeve 30C to prevent the inner tube 10A from slipping out of the outer tube 20B. The limiting screw sleeve 30C is provided at the tension joint between the outer tube 20B and the inner tube 10A, so that the limiting screw sleeve 30C can be used to hold and limit the inner tube 10A, preventing the inner tube 10A from directly slipping out of the outer tube 20B.

[0075] The difference between this embodiment and the prior art is that:

[0076] The inner tube 10A is inserted into the outer tube 20B and can slide along the axial direction of the outer tube 20B, thereby enabling the inner tube 10A and the outer tube 20B to have a telescopic function, so that the length can be flexibly adjusted by the relative movement of the inner / outer tube 20B. The end of the inner tube 10A extending into the outer tube 20B is connected to an electrically controlled locking structure. Specifically, one end of the inner tube 10A near the outer tube 20B is threadedly connected to the connecting end 106 of the fixing seat 100. The end of the fixing seat 100 connected to the locking member 500 is exposed outside the inner tube 10A and extends into the outer tube 20B.

[0077] Once the inner tube 10A is stretched to the required length, the controller 302 adjusts the rotation of the drive motor 301, causing its drive gear 201 to drive the driven gear 203 to rotate through the gear set 202. The driven gear 203, through the rotating part 204, drives the wedge block 400 to move up and down, so that the frustum-shaped wedge block 400 can drive the four locking parts 500 to open radially. The friction plates 800 bonded to the friction surfaces 503 of the four locking parts 500 contact the inner wall of the outer tube 20B, stopping the rotation of the drive motor 301. This achieves effective friction and tension locking, reduces the slippage and loosening of the inner tube 10A under external force, and ensures the stability of the telescopic rod.

[0078] Conversely, after the friction plate 800 of the locking component 500 disengages from the inner wall of the outer tube 20B, a gap is provided between the friction plate 800 and the inner wall of the outer tube 20B, allowing for readjustment of the stretching of the inner tube 10A and the outer tube 20B. The provided electronic control 300 enables automated control and adjustment of the locking and unlocking actions, while improving the convenience and accuracy of the telescopic rod's telescopic locking operation. This utility model sets the electronic locking structure on the inner tube 10A and the outer tube 20B of the telescopic rod, which can achieve efficient and reliable locking and unlocking of the telescopic rod's expansion and contraction.

[0079] In summary, this invention offers higher locking efficiency and stability compared to the manual locking method of the prior art. It also has lower manufacturing costs and a lower failure rate in the drive locking structure of the drive motor 301 and gear transmission component 200 compared to the prior art hydraulic locking telescopic rod, thereby improving service life and practicality. In addition, the electronic control 300 allows for convenient control of the locking friction and speed of the locking structure.

[0080] Example 2, in this example, refer to Figure 11 and Figure 12 The electrically controlled locking telescopic rod, in practical applications, is exemplified by its application as a telescopic device for monopods in photographic equipment. The monopod includes a set of electrically controlled locking telescopic rods, a support leg 40D, and a mounting base 50E for mounting photographic equipment. The support leg 40D is mounted at the bottom of the electrically controlled locking telescopic rod, and the mounting base 50E is sleeved on the top of the electrically controlled locking telescopic rod. Specifically, the outer tube 20B serves as the base tube, and the inner tube 10A is composed of multiple telescopic connecting sections. The multiple connecting sections of the inner tube 10A in the telescopic rod are stretched to the required length, and the joint locking between the inner tube 10A and the outer tube 20B can be controlled by the electrical control 300, thereby locking the stretched length of the inner tube 10A and the outer tube 20B, further improving the locking efficiency. Furthermore, the cost of using an electrically controlled structure is lower than that of hydraulically locked telescopic rods in existing technologies, and it is easier to store and transport.

[0081] Example 3, in this example, refer to Figure 13 and Figure 14 The electrically controlled locking telescopic rod, in practical applications, is exemplified by its application as a telescopic device for tripods in photographic equipment. The tripod includes three sets of electrically controlled locking telescopic rods and a support base 60F for connecting the three sets. The three sets of electrically controlled locking telescopic rods are evenly spaced at the bottom of the support base 60F, and a fixed end for mounting photographic equipment is formed at the top of the support base 60F. Specifically, the outer tube 20B serves as the base tube, and the inner tube 10A is composed of multiple telescopic connecting sections. The multiple connecting sections of the inner tube 10A in the tripod's telescopic rod are stretched to the required length, and the joint locking between the inner tube 10A and the outer tube 20B can be controlled by the electrical control 300, thereby locking the extended length of the inner tube 10A and the outer tube 20B, further improving the locking efficiency. Furthermore, the cost of using an electrically controlled structure is lower than that of hydraulically locked telescopic rods in existing technologies, and it is easier to store and transport.

[0082] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. 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 utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. An electrically controlled locking structure, characterized in that: It includes a fixed base, a transmission component mounted on the fixed base, and an electrical control for driving the transmission component to rotate. The transmission component is equipped with a rotatable rotating component, and a wedge block that can move up and down along the axial direction of the rotating component is connected to the rotating component. A locking component that can open and close in the radial direction is connected to the outside of the wedge block. A cover plate is connected to the bottom of the fixed base, and the locking component is located between the fixed base and the cover plate. When the transmission component drives the rotating component to rotate, the wedge block moves up and down and slides under the rotation of the rotating component. This allows the wedge block to push the locking component outward or contract towards the center of the fixed seat. Thus, the locking action can be performed by opening the locking component and the unlocking action can be performed by closing the locking component.

2. The electronically controlled locking structure according to claim 1, characterized in that: An inclined wedge-tightening connecting portion is formed on the outer side of the wedge-tightening block. A wedge-tightening mounting portion is provided on the locking member to be paired with the wedge-tightening connecting portion. The lifting and lowering movement of the wedge-tightening block causes the inclined wedge-tightening connecting portion to drive the locking member to open and close. A limiting guide groove for pairing the wedge-tightening block is formed on the fixed base. A wedge-tightening guide portion that is paired with the limiting guide groove is formed on the outer side of the wedge-tightening block.

3. The electronically controlled locking structure according to claim 2, characterized in that: The bottom of the fixed base has two or more protruding limiting blocks, and a movable guide groove for mating and installing the locking member is formed between the two limiting blocks, so that the locking member can move open and close along the movable guide groove. The outer side of the locking member has a friction surface for friction locking.

4. The electronically controlled locking structure according to claim 3, characterized in that: One end of the rotating component is connected to the transmission component, and the other end of the rotating component has a threaded portion. The wedge block is provided with a threaded hole that is matched and connected to the threaded portion. When the rotating component rotates, the wedge block can rotate along the threaded portion of the rotating component through the threaded hole and move axially.

5. The electronically controlled locking structure according to claim 4, characterized in that: Friction plates are bonded to the friction surface.

6. The electronically controlled locking structure according to any one of claims 1-5, characterized in that: The electrical control system includes a drive motor and a controller. The drive motor is mounted on a fixed base, and its drive shaft is connected to a transmission component. The controller is electrically connected to the drive motor via a wire, and it is equipped with a control button for controlling the rotation of the drive motor.

7. The electronically controlled locking structure according to claim 6, characterized in that: The transmission component includes a drive gear and a gear set. The drive gear is coaxially connected to the drive shaft of the drive motor. The gear set is mounted on a fixed base, and one end of the gear set is meshed with the drive gear. The gear set is provided with a driven gear that is connected to the rotating component.

8. The electronically controlled locking structure according to claim 7, characterized in that: The fixed base is provided with an end cover, which covers the transmission component on the fixed base, so that the transmission component is located between the fixed base and the end cover, and the drive motor is installed on the end cover.

9. An electrically controlled locking telescopic rod, characterized in that, The device includes an inner tube, an outer tube, and an electrically controlled locking structure as described in any one of claims 1-8. Both the inner tube and the outer tube are made of hollow tubes. The inner tube passes through the outer tube and can slide along the axial direction of the outer tube. One end of the inner tube near the outer tube is connected to a fixed seat. The end of the fixed seat connected to the locking element is exposed outside the inner tube. In the locked state, when the control unit drives the rotating part to rotate through the transmission component, the wedge block moves towards the inner tube under the drive of the rotating part, and drives the locking part to be squeezed and opened towards the outside of the fixed seat, so that the outer side of the locking part is rubbed and tightened against the inner wall of the outer tube, thereby completing the locking action between the inner tube and the outer tube. In the unlocked state, when the electronic control unit drives the rotating component to rotate through the transmission component, the wedge block moves towards the outer tube under the drive of the rotating component, and drives the locking component to retract and close towards the center of the fixed seat, so that the outer side of the locking component separates from the inner wall of the outer tube, thereby completing the locking action between the inner tube and the outer tube.

10. The electrically controlled locking telescopic rod according to claim 9, characterized in that: One end of the outer tube is provided with a limiting end or limiting screw sleeve to prevent the inner tube from slipping out of the outer tube.

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