Electric control locking structure and electric control locking telescopic rod

Abstract

The invention relates to an electric control locking structure and an electric control locking telescopic rod in the field of locking structures, the electric control locking structure comprises 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 performing lifting motion in the axial direction of the rotating piece is connected to the rotating piece. According to the invention, 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] The invention relates to the field of locking structures, and in particular to an electrically controlled locking structure and an electrically controlled locking telescopic rod. Background Art

[0002] In daily life and industrial production, telescopic mechanisms have a wide range of applications, and locking structures play a vital role in various telescopic mechanisms, including but not limited to fishing rods, construction (such as surveying and mapping brackets, etc.), the automotive industry, the processing and manufacturing industry, performing arts props, sports equipment, photographic equipment (such as tripods, monopods, etc.) and other fields. The telescopic characteristics of the telescopic mechanism enable it to be adjusted to stretch or shrink to the required length according to needs. Therefore, these telescopic mechanisms usually require a locking structure for quick locking, so that they can be conveniently used and adjusted according to actual needs.

[0003] The locking structure of the existing telescopic mechanism has a variety of ways to lock and unlock, including manual plate buckle locking, manual thread locking and hydraulic locking. In the manual plate buckle locking structure, the external buckle is closed to deform the external large tube and squeeze the internal small tube to achieve locking. In the manual thread locking, the external large tube is deformed and squeezed by the external screw thread to achieve locking. In the hydraulic locking, the hydraulic device built into the tube is controlled by the handle, and the hydraulic device squeezes the friction piece to contact the inner wall of the large tube to achieve locking, so that different locking structures can be applied to different usage requirements.

[0004] However, although the existing locking structure has been widely used in telescopic mechanisms, it still has some defects and shortcomings. The structure and operation of the existing manual locking method are complicated, and the user needs to perform multiple operations or apply a large force to complete locking and unlocking. This not only increases the difficulty of operation for the user, but also reduces the use 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, but 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, and the control structure of the hydraulic locking has a high manufacturing cost, which is not conducive to promotion and use. Summary of the invention

[0005] The purpose of the present invention is to solve the above defects and provide an electrically controlled locking structure and an electrically controlled locking telescopic rod to solve the technical problems that the control efficiency of the existing locking structure in the above background technology is low, it is not easy to lock or unlock quickly, and the use efficiency is affected.

[0006] The object of the present invention is achieved in the following ways:

[0007] An electrically controlled locking structure, comprising a fixed seat, a transmission member arranged on the fixed seat, and an electric control member for driving the transmission member to rotate, wherein a rotatable rotating member is arranged on the transmission member, a wedge block which can be lifted and lowered along the axial direction of the rotating member is connected to the rotating member, a locking member which can be opened and closed along the radial direction is connected to the outer side of the wedge block, a cover plate is connected to the bottom of the fixed seat, and the locking member is arranged between the fixed seat and the cover plate;

[0008] When the transmission member drives the rotating member to rotate, the wedge block is lifted and slid under the rotation of the rotating member, so that the wedge block can drive the locking member to be squeezed and opened toward the outside of the fixed seat or to be contracted and closed toward the center of the fixed seat, thereby performing the locking action by the opening of the locking member and performing the unlocking action by the closing of the locking member.

[0009] Further in the above description, an inclined wedging connection portion is formed on the outer side of the wedging block, and a wedging mounting portion is provided on the locking member to be matched with the wedging connection portion. Under the lifting and lowering movement of the wedging block, the inclined wedging connection portion can drive the locking member to open and close, a limiting guide groove for matching with the wedging block is formed on the fixed seat, and a wedging guide portion is formed on the outer side of the wedging block to be matched with the limiting guide groove.

[0010] Optionally, in some embodiments, a plurality of wedging connection parts are provided so that they can be matched and connected to a plurality of locking members, each locking member is provided with a connection groove, and a spring is installed on the connection groove. The provision of the spring can help increase the locking friction of the locking member and improve the stability and reliability of the locking of the locking member.

[0011] The wedging connection part and the wedging installation part are wedgingly matched, so that the wedging block can drive the locking piece to be squeezed open or contracted and closed through the wedging connection part during the lifting movement, thereby controlling the tension locking of the locking piece and the external fixing piece, and improving the stability and reliability of control and locking.

[0012] Optionally, in some embodiments, the wedging connection portion and the wedging installation portion are plugged in and matched, the wedging connection portion is a wedging connection protrusion or a wedging connection groove, and the wedging installation portion is provided with a wedging installation groove or a wedging installation protrusion that matches the wedging connection protrusion or the wedging connection groove.

[0013] Further in the above description, the outer side surface of the wedge block is inclined, so that the wedge block is arranged in a prism shape that is narrow at the top and wide at the bottom, or narrow at the bottom and wide at the top, for example: a triangular prism, a quadrangular prism, a pentagonal prism, etc.

[0014] Further in the above description, the bottom of the fixed seat is formed with more than two raised limit blocks, and a movable guide groove for matching and installing the locking member is formed between the two limit blocks, so that the locking member can open and close along the movable guide groove, and the outer side surface of the locking member is formed with a friction surface for friction locking.

[0015] Further in the above description, the limit block is provided with a connection hole, and the cover plate is connected and installed with the connection hole by screws.

[0016] The inner side of the locking piece is matched and connected with the wedge block, and the outer side surface of the locking piece is inserted into the movable guide groove. The locking piece is arranged between the fixed seat and the cover plate. The cover plate and the limit block are arranged to prevent the locking piece from moving up and down, ensuring that the locking piece only moves in the radial diffusion or contraction direction, thereby ensuring the stable movement of the locking piece and the locking or unlocking control.

[0017] The frictional force of the contact with the external fixing member is enhanced by the provided friction surface, thereby ensuring the locking of the locking member with the external fixing member.

[0018] Further in the above description, one end of the rotating member is connected to the transmission member, and a threaded portion is formed at the other end of the rotating member, and a threaded hole is provided on the wedge block for mating connection with the threaded portion. When the rotating member rotates, the wedge block can rotate along the threaded portion of the rotating member through the threaded hole and move axially.

[0019] The wedge block is installed in pair with the limiting guide groove of the fixed seat so that the wedge block can slide along the limiting guide groove, and the threaded portion of the rotating member is threadedly connected to the threaded hole of the wedge block. When the rotating member rotates, the wedge block can be raised and lowered along the limiting guide groove through the threaded hole, so that the locking member can be driven to expand or contract under the lifting and lowering movement of the wedge block.

[0020] Further in the above description, a friction plate is bonded to the friction surface.

[0021] The stability and firmness of the friction locking between the locking member and the external fixing member are further enhanced by bonding the friction plate.

[0022] Further in the above description, the electrical control unit includes a drive motor and a controller, the drive motor is arranged on a fixed seat, and the drive shaft of the drive motor is drive-connected to the transmission member, the controller is electrically connected to the drive motor through wires, and the controller is provided with a control button for controlling the rotation of the drive motor.

[0023] The controller adjusts the positive / negative current outputted by the positive / negative poles of the power supply to control the forward / reverse rotation of the driving motor, so that the forward / reverse rotation of the driving motor drives the locking member through the transmission member to achieve locking and unlocking. Specifically, the transmission member drives the rotating member to rotate, so that the rotation of the rotating member can control the lifting and lowering of the wedge block and drive the locking member to open or contract. The driving of the driving motor can accurately control the locking speed and strength of the locking member, so that the friction force when the locking member and the external fixing member are locked can be adjusted by the controller.

[0024] Furthermore, the control buttons are composed of a general forward button, a general reverse button, and forward / reverse buttons of each drive motor. The controller can have a built-in power supply and an external power supply, so that the locking or unlocking action can be controlled by pressing the corresponding drive motor or the general forward / reverse button.

[0025] Further in the above description, the transmission member includes a driving gear and a gear set, the driving gear is coaxially connected to the driving shaft of the driving motor, the gear set is installed on a fixed seat, and one end of the gear set is meshed with the driving gear, and the gear set is provided with a driven gear connected to the rotating member.

[0026] The driving gear drives the gear set to rotate and drives the driven gear to rotate, so that the rotation of the rotating member can be effectively regulated, and the locking force or speed of the locking member can be controlled.

[0027] In the above description, the fixing seat is provided with an end cover, which covers the transmission member on the fixing seat, so that the transmission member is arranged between the fixing seat and the end cover, and the drive motor is installed on the end cover. The end cover can protect the transmission member from water and dust.

[0028] An electrically controlled locking telescopic rod, comprising an inner tube, an outer tube and an electrically controlled locking structure, wherein the inner tube and the outer tube are both made of hollow tubes, the inner tube is inserted into the outer tube and can slide along the axial direction of the outer tube, one end of the inner tube close to the outer tube is connected to a fixing seat, and the end of the fixing seat connected with a locking piece is exposed and arranged outside the inner tube;

[0029] In the locked state, when the electric control unit drives the rotating member to rotate through the transmission member, the wedge block moves toward the inner tube under the drive of the rotating member, and drives the locking member to be squeezed and opened toward the outside of the fixed seat, so that the outer side surface of the locking member and the inner wall of the outer tube generate friction and tension, thereby completing the locking action of the inner tube and the outer tube;

[0030] In the unlocked state, when the electric control unit drives the rotating member to rotate through the transmission member, the wedge block moves toward the outer tube under the drive of the rotating member, and drives the locking member to shrink and close toward the center of the fixed seat, so that the outer side surface of the locking member is separated from the inner wall of the outer tube, thereby completing the locking action of the inner tube and the outer tube.

[0031] In the locked state, the friction surface of the locking piece is pressed against the inner wall of the outer tube, thereby generating friction between the locking piece and the inner wall of the outer tube, thereby locking the inner tube and the outer tube. Conversely, in the unlocked state, the friction surface of the locking piece is disengaged from the inner wall of the outer tube, thereby unlocking the inner tube and the outer tube.

[0032] In the above description, one end of the outer tube is provided with a limiting end or limiting screw sleeve for preventing the inner tube from slipping out from the inner part of the outer tube. The provided limiting end or limiting screw sleeve can be used to clamp and limit the inner tube to prevent the inner tube from directly slipping out of the inner part of the outer tube.

[0033] Beneficial effects of the present invention:

[0034] 1. The transmission part is driven to rotate by the electric control component so that it can drive the rotating part to rotate. The wedge block can be lifted and lowered under the rotation of the rotating part. The lifting and lowering movement of the wedge block further drives the locking part to open and close radially. The electric control adjustment of the electric control component enables the locking part to fit tightly or release the locked object, so that the locking structure can respond quickly and accurately, ensuring the reliability of locking and the smoothness of unlocking, making the locking action and unlocking more direct and efficient, improving the convenience and automation of operation, realizing the locking action by opening the locking part or realizing the unlocking action by contracting and closing the locking part, and improving the flexibility and applicability of the locking structure. The present invention realizes the efficient and reliable operation of the locking structure through the combination of precise mechanical design and electrical control. The synergy between its components not only improves the accuracy and stability of the locking action, but also prolongs the service life and reduces the maintenance cost. At the same time, the structural manufacturing cost of this scheme is low, and it has significant technical advantages and market value.

[0035] 2. The inner tube is inserted into the outer tube and can slide along the axial direction of the outer tube, so that the inner tube and the outer tube form a telescopic function, so that the length can be flexibly adjusted through the relative movement of the inner / outer tubes. The end of the inner tube close to the outer tube is connected to the fixing seat, and the end of the fixing seat connected with the locking piece is exposed and arranged outside the inner tube. When the inner tube is stretched to the required length, the locking piece is driven by the electric control unit to open radially, so that the friction surface of the locking piece contacts the inner wall of the outer tube, realizing effective friction and tension locking, reducing the sliding loosening of the inner tube under the action of external force, and ensuring telescopic. The stability of the rod, on the contrary, after the friction surface of the locking piece is separated from the inner wall of the outer tube, the inner tube and the outer tube can be stretched and adjusted again, and the set electric control unit realizes the automatic control and adjustment of the locking and unlocking actions, and at the same time, improves the convenience and accuracy of the telescopic locking operation of the telescopic rod. The present invention arranges the electric control locking structure on the inner tube and the outer tube of the telescopic rod, which can realize the efficient and reliable locking and unlocking actions of the expansion and contraction of the telescopic rod, and the manufacturing cost and failure rate of the structure are lower than those of the hydraulic locking telescopic rod, and has wide practicality. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0038] Figure 3 It is a schematic diagram of the exploded structure of the electric-controlled locking structure of this embodiment from a top view;

[0039] Figure 4 It is a schematic diagram of the exploded structure of the electric-controlled locking structure of this embodiment from a bottom-up perspective;

[0040] Figure 5 Schematic diagram of the connection structure between the wedge block and the locking member in this embodiment;

[0041] Figure 6 Schematic diagram of the connection structure between the locking member and the friction plate in this embodiment;

[0042] Figure 7 Schematic diagram of the installation of the transmission member in this embodiment;

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

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

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

[0046] Fig.11 This is a schematic diagram of the overall structure of the monopod in the second embodiment;

[0047] Fig.12 This is a schematic diagram of the internal connection structure of the monopod in the second embodiment;

[0048] Fig.13 This is a schematic diagram of the overall structure of the tripod in the third embodiment;

[0049] Fig.14 This is a schematic diagram of the internal connection structure of the tripod in the third embodiment;

[0050] The reference numerals in the figure are: 100-fixed seat, 101-limiting block, 102-moving guide groove, 103-limiting guide groove, 104-connecting hole, 105-threading hole, 106-connecting end; 200-transmission member, 201-driving gear, 202-gear set, 203-driven gear, 204-rotating member, 205-threaded portion; 300-electric control unit, 301-driving motor, 302-controller, 303-control button, 304-control button, 305-threaded portion; 04-electric wire; 400-wedge block, 401-wedge connection part, 402-wedge guide part, 403-threaded hole; 500-locking piece, 501-wedge installation part, 502-connecting groove, 503-friction surface; 600-cover plate, 700-spring, 800-friction plate, 900-end cover; 10A-inner tube, 20B-outer tube, 30C-limiting screw sleeve, 40D-support bracket, 50E-mounting seat, 60F-support seat. DETAILED DESCRIPTION

[0051] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0052] Embodiment 1, this embodiment, refer to Figure 1-Figure 10 The specifically implemented electric control locking structure includes a fixed seat 100, a transmission member 200 disposed on the fixed seat 100, and an electric control unit 300 for driving the transmission member 200 to rotate. The transmission member 200 is provided with a rotatable rotating member 204, and the rotating member 204 is connected with a wedge block 400 that can move up and down along the axial direction of the rotating member 204, and the outer side of the wedge block 400 is connected with a locking member 500 that can open and close along the radial direction. The bottom of the fixed seat 100 is connected with a cover plate 600, and the locking member 500 is arranged between the fixed seat 100 and the cover plate 600;

[0053] When the transmission member 200 drives the rotating member 204 to rotate, the wedging block 400 is lifted and slid under the rotation of the rotating member 204, so that the wedging block 400 can drive the locking member 500 to be squeezed and opened toward the outside of the fixing seat 100 or to be contracted and closed toward the center of the fixing seat 100, so that the locking action can be performed by the opening of the locking member 500, and the unlocking action can be performed by the closing of the locking member 500.

[0054] Specifically, refer to Figure 3-Figure 5 In this embodiment, the outer side of the wedge block 400 is inclined, and the wedge block 400 in this embodiment is in the shape of a quadrangular pyramid with a narrow top and a wide bottom. An inclined protruding wedge connection part 401 is formed on the outer side of the wedge block 400, and a wedge installation part 501 is provided on the locking member 500 to be matched with the wedge connection part 401. The wedge installation part 501 is configured as a notch for plugging and matching with the wedge connection part 401. When the wedge block 400 is lifted and lowered, the inclined wedge connection part 401 can drive the locking member 500 to open and close. The fixing seat 100 is formed with limiting guide grooves 103 for matching the four corners of the wedge block 400. The limiting guide grooves 103 are provided on the inner side of the limiting protrusions. The four corners of the wedge block 400 are formed with wedge guide parts 402 to be matched with the limiting guide grooves 103, so that the wedge block 400 can slide along the limiting guide grooves 103.

[0055] In this embodiment, refer to Figure 4 and Figure 5 There are four wedge-tightening connecting parts 401, which can be matched to connect four locking members 500. Each locking member 500 is provided with a connecting groove 502, and a spring 700 is installed on the connecting groove 502 for connecting each locking member 500. The setting of the spring 700 can help increase the locking friction of the locking member 500, and improve the stability and reliability of the locking of the locking member 500.

[0056] Optionally, in some embodiments, the wedging connection portion 401 and the wedging installation portion 501 are plugged together, the wedging connection portion 401 is a wedging connection protrusion protruding outward or a wedging connection groove recessed inward, and the wedging installation portion 501 is a wedging installation groove or a wedging installation protrusion that is matched with the wedging connection protrusion or the wedging connection groove.

[0057] The wedging connection part 401 is wedged with the wedging installation part 501, so that when the wedging block 400 moves up and down, the wedging connection part 401 drives the locking member 500 to be squeezed open or contracted and closed, that is, when the wedging block 400 rises, the wider end of its bottom moves upward and squeezes the locking member 500, thereby controlling the tension locking of the locking member 500 and the external fixing member, thereby 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 seat 100 is formed with four raised limit blocks 101, and a movable guide groove 102 for matching and installing the locking member 500 is formed between two adjacent limit blocks 101, so that the locking member 500 can be opened and closed along the movable guide groove 102, and the outer side of the locking member 500 is formed with a friction surface 503 for friction locking. The limit blocks 101 are provided with connecting holes 104, and the cover plate 600 is connected and installed with the connecting holes 104 by screws. A conductive threading hole 105 is provided on the fixing seat 100, and a connecting end 106 is formed at the end of the fixing seat 100 away from the limit blocks 101.

[0059] The inner side of the locking piece 500 is matched and connected with the wedge block 400, and the outer side surface of the locking piece 500 is inserted into the movable guide groove 102. The locking piece 500 is arranged between the fixed seat 100 and the cover plate 600. The cover plate 600 and the limit block 101 are arranged to prevent the locking piece 500 from moving up and down, ensuring that the locking piece 500 only moves in the radial diffusion or contraction direction, thereby ensuring the stable movement of the locking piece 500 and the locking or unlocking control.

[0060] The frictional force of the contact with the external fixing member is enhanced by the provided friction surface 503, so that the locking of the locking member 500 and the external fixing member can be ensured.

[0061] Optionally, in some embodiments, referring to Figure 6 , a friction sheet 800 is bonded to the friction surface 503. The stability and firmness of the friction locking between the locking member 500 and the external fixing member are further enhanced by bonding the friction sheet 800. Optionally, the friction sheet 800 is paired according to the number of the locking members 500, and the friction sheet 800 can be selected according to the friction force of locking with the external fixing member.

[0062] Specifically, refer to Figure 3-Figure 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 is formed with a threaded portion 205. The wedge block 400 is provided with a threaded hole 403 that is matched with the threaded portion 205. When the rotating member 204 rotates, the wedge block 400 can rotate along the threaded portion 205 of the rotating member 204 through the threaded hole 403 and move axially. The four corners of the wedge block 400 are matched 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, and the threaded portion 205 of the rotating member 204 is threadedly connected with the threaded hole 403 of the wedge block 400. When the rotating member 204 rotates, the wedge block 400 can be adjusted along the limiting guide groove 103 through the threaded hole 403, so that the locking member 500 can be expanded or contracted under the lifting movement of the wedge block 400.

[0063] Specifically, the threaded portion 205 of the rotating member 204 is matched and connected with the threaded hole 403 of the wedge block 400. When the wedge block 400 passes through the limiting guide groove 103, the rotation of the wedge block 400 is converted into linear motion. The specific action process belongs to conventional technical means and will not be elaborated here.

[0064] Specifically, refer to Figure 1 In this embodiment, the electric control unit 300 includes a driving motor 301 and a controller 302. The driving motor 301 is arranged on the fixing seat 100 or the end cover 900, and the driving shaft of the driving motor 301 is drivingly connected to the transmission member 200. The controller 302 is electrically connected to the driving motor 301 through an electric wire 304, and a control button 303 for controlling the rotation of the driving motor 301 is arranged on the controller 302.

[0065] Specifically, in this embodiment, the fixed seat 100 is provided with an end cover 900, and the end cover 900 covers the transmission member 200 on the fixed seat 100, so that the transmission member 200 is arranged between the fixed seat 100 and the end cover 900, and the drive motor 301 is installed on the end cover 900. The transmission member 200 is installed between the fixed seat 100 and the end cover 900, and the drive motor 301 is installed on the fixed seat 100 or the end cover 900. The end cover 900 assists in installing the drive motor 301, and at the same time, the end cover 900 can play a role in waterproofing and dustproofing the transmission member 200.

[0066] The controller 302 adjusts the positive / negative current outputted by the positive / negative poles of the power supply to control the forward / reverse rotation of the driving motor 301, so that the forward / reverse rotation of the driving motor 301 drives the locking member 500 through the transmission member 200 to achieve locking and unlocking. Specifically, the transmission member 200 drives the rotating member 204 to rotate, so that the rotation of the rotating member 204 can control the lifting and lowering of the wedge block 400 and drive the locking member 500 to open or contract. The driving of the driving motor 301 can accurately control the locking speed and strength of the locking member 500, so that the friction force when the locking member 500 and the external fixing member are locked can be adjusted by the controller 302.

[0067] In some embodiments, the control button 303 is composed of a general forward button, a general reverse button, and forward / reverse buttons of each drive motor 301. The controller 302 can 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 Figure 3-Figure 7 In this embodiment, the transmission member 200 includes a driving gear 201 and a gear set 202. The driving gear 201 is coaxially connected to the driving shaft of the driving motor 301. The gear set 202 is mounted on the fixing seat 100, and one end of the gear set 202 is meshed with the driving gear 201. The gear set 202 is provided with a driven gear 203 connected to the rotating member 204. The driving gear 201 drives the gear set 201 to rotate and drives the rotation of the driven gear 203, which can effectively regulate the rotation of the rotating member 204, and further control the locking force or speed of the locking member 500.

[0069] Reference Figure 1-Figure 10 The specifically implemented electrically controlled locking telescopic rod comprises an inner tube 10A, an outer tube 20B and an electrically controlled locking structure. The inner tube 10A and the outer tube 20B are both made of hollow tubes. The inner tube 10A is inserted into the outer tube 20B and can slide along the axial direction of the outer tube 20B. One end of the inner tube 10A close to 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 with the locking member 500 is exposed and arranged outside the inner tube 10A.

[0070] In the locked state, when the driving motor 301 drives the rotating member 204 to rotate through the transmission member 200, the wedge block 400 moves toward the inner tube 10A under the drive of the rotating member 204, and drives the locking member 500 to be squeezed and opened toward the outside of the fixing seat 100, so that the outer side surface of the locking member 500 and the inner wall of the outer tube 20B are frictionally tightened, completing the locking action of the inner tube 10A and the outer tube 20B;

[0071] In the unlocked state, when the electric control unit 300 drives the rotating member 204 to rotate through the transmission member 200, the wedge block 400 moves toward the outer tube 20B under the drive of the rotating member 204, and drives the locking member 500 to shrink and close toward the center of the fixing seat 100, so that the outer side surface of the locking member 500 is separated from the inner wall of the outer tube 20B, thereby completing the locking action of 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 sections of retractable connecting tubes, so that multiple retractable connecting tubes can be connected according to actual usage requirements, and a group of electrically controlled locking structures are connected to the joint ends of each section of the retractable inner tube 10A, so that the electrically controlled locking structure can perform locking control when locking the multiple sections of the inner tube 10A when stretched or contracted.

[0073] Specifically, in the locked state of the present embodiment, the friction surface 503 of the locking member 500 is in pressure contact with the inner wall of the outer tube 20B, so that the locking member 500 and the inner wall of the outer tube 20B generate friction, thereby enabling the inner tube 10A and the outer tube 20B to be locked. Conversely, in the unlocked state, the friction surface 503 of the locking member 500 is disengaged from the inner wall of the outer tube 20B, thereby enabling the inner tube 10A and the outer tube 20B to be unlocked.

[0074] Specifically, one end of the outer tube 20B in this embodiment is provided with a limiting screw sleeve 30C for preventing the inner tube 10A from slipping off from the inner part of the outer tube 20B. The limiting screw sleeve 30C is provided at the stretching joint between the outer tube 20B and the inner tube 10A, so that the provided limiting screw sleeve 30C can be used to clamp and limit the inner tube 10A, preventing the inner tube 10A from directly slipping off from the stretching inside 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, so that the inner tube 10A and the outer tube 20B form a telescopic function, so that the inner tube 10A and the outer tube 20B can be flexibly adjusted in length through the relative movement of the inner / outer tube 20B. The end of the inner tube 10A extending toward the outer tube 20B is connected with an electrically controlled locking structure. Specifically, one end of the inner tube 10A close to the outer tube 20B is threadedly connected to the connecting end 106 of the fixing seat 100, and the end of the fixing seat 100 connected with the locking member 500 is exposed and arranged outside the inner tube 10A and extends toward the outer tube 20B.

[0077] When the inner tube 10A is stretched to the required length, the controller 302 adjusts the rotation of the driving motor 301, so that the driving gear 201 drives the driven gear 203 to rotate through the gear set 202, and the driven gear 203 drives the wedge block 400 to move up and down through the rotating member 204, so that the four-sided pyramid-shaped wedge block 400 can drive the four locking members 500 to open radially, and the friction plates 800 bonded on the friction surfaces 503 of the four locking members 500 contact the inner wall of the outer tube 20B, stopping the rotation of the driving motor 301, achieving effective friction and tension locking, reducing the sliding loosening of the inner tube 10A under the action of external force, and ensuring the stability of the telescopic rod;

[0078] On the contrary, after the friction plate 800 of the locking member 500 is separated 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, so that the inner tube 10A and the outer tube 20B can be stretched and adjusted again. The electric control unit 300 is provided to realize the automatic control and adjustment of the locking and unlocking actions, and at the same time, the convenience and accuracy of the telescopic locking operation of the telescopic rod are improved. The present invention arranges the electric control locking structure on the inner tube 10A and the outer tube 20B of the telescopic rod, which can realize the efficient and reliable locking and unlocking of the expansion and contraction of the telescopic rod;

[0079] In summary, the locking efficiency and stability of the present invention are higher than those of the manual locking method in the prior art, and the manufacturing cost of the hydraulic locking telescopic rod in the prior art is low, and the failure rate of the driving locking structure of the driving motor 301 and the gear transmission part 200 is low, thereby improving the service life and practicality. At the same time, the setting of the electric control unit 300 can conveniently control the locking friction and speed of the locking structure.

[0080] Embodiment 2, in this embodiment, refer to Fig.11 and Fig.12 The electrically-controlled locking telescopic rod specifically implemented in the embodiment of the present invention is used as an exemplary telescopic device of a monopod in photographic equipment as an example of applying the electrically-controlled locking telescopic rod to the telescopic device of the monopod in photographic equipment, wherein the monopod comprises a group of electrically-controlled locking telescopic rods, a supporting tripod 40D and a mounting seat 50E for mounting photographic equipment, the supporting tripod 40D is mounted on the bottom end of the electrically-controlled locking telescopic rod, and the mounting seat 50E is sleeved and mounted on the top end of the electrically-controlled locking telescopic rod. Specifically, the outer tube 20B serves as a base tube, and the inner tube 10A is composed of a plurality of retractable connecting tubes. The multi-section connected inner tube 10A in the telescopic rod is stretched to a required length, and the multi-section connected inner tube 10A can be controlled by the electric control unit 300 to perform joint locking of the inner tube 10A and the outer tube 20B, thereby completing the locking of the stretched length of the inner tube 10A and the outer tube 20B, further improving the locking efficiency of use. At the same time, the setting of the electrically-controlled structure has a lower cost than the hydraulic locking and unfolding of the telescopic rod in the prior art, and is convenient for storage and transportation.

[0081] Embodiment 3, in this embodiment, refer to Fig.13 and Fig.14 The electrically-controlled locking telescopic rod specifically implemented is used as an exemplary telescopic device for a tripod in photographic equipment in actual application. The tripod includes three groups of electrically-controlled locking telescopic rods and a support seat 60F for connecting the three groups of electrically-controlled locking telescopic rods. The three groups of electrically-controlled locking telescopic rods are evenly spaced at the bottom of the support seat 60F. A fixed end for mounting photographic equipment is formed on the top of the support seat 60F. Specifically, the outer tube 20B serves as a base tube, and the inner tube 10A is composed of a plurality of retractable connecting tubes. The multi-section connected inner tube 10A in the telescopic rod of the tripod is stretched to a required length, and the multi-section connected inner tube 10A can be controlled by the electric control unit 300 to perform joint locking of the inner tube 10A and the outer tube 20B, thereby completing the locking of the stretched length of the inner tube 10A and the outer tube 20B, further improving the locking efficiency of use. At the same time, the setting of the electrically-controlled structure is lower than the cost of hydraulic locking and unfolding of the telescopic rod in the prior art, and is convenient for storage and transportation.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. Electric locking structure, characterized by: The invention comprises a fixed seat, a transmission member arranged on the fixed seat and an electric control unit for driving the transmission member to rotate, wherein a rotatable rotating member is arranged on the transmission member, a wedge block which can be lifted and lowered along the axial direction of the rotating member is connected to the rotating member, a locking member which can be opened and closed along the radial direction is connected to the outer side of the wedge block, a cover plate is connected to the bottom of the fixed seat, and the locking member is arranged between the fixed seat and the cover plate; When the transmission member drives the rotating member to rotate, the wedge block is lifted and slid under the rotation of the rotating member, so that the wedge block can drive the locking member to be squeezed and opened toward the outside of the fixed seat or to be contracted and closed toward the center of the fixed seat, thereby performing the locking action by the opening of the locking member and performing the unlocking action by the closing of the locking member.

2. The electric control locking structure according to claim 1, characterized in that: An inclined wedging connection portion is formed on the outer side of the wedging block, and a wedging installation portion matched with the wedging connection portion is provided on the locking piece. When the wedging block moves up and down, the inclined wedging connection portion can drive the locking piece to open and close. A limiting guide groove for matching the wedging block is formed on the fixing seat, and a wedging guide portion matched with the limiting guide groove is formed on the outer side of the wedging block.

3. The electric control locking structure according to claim 2, characterized in that: The bottom of the fixing seat is formed with more than two raised limit blocks, and a movable guide groove for matching and installing the locking piece is formed between the two limit blocks, so that the locking piece can open and close along the movable guide groove, and the outer side surface of the locking piece is formed with a friction surface for friction locking.

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

5. The electric control locking structure according to claim 4, characterized in that: A friction plate is bonded to the friction surface.

6. The electric control locking structure according to any one of claims 1 to 5, characterized in that: The electric control unit includes a drive motor and a controller. The drive motor is arranged on a fixed seat, and the drive shaft of the drive motor is drivingly connected to the transmission member. The controller is electrically connected to the drive motor through wires, and a control button for controlling the rotation of the drive motor is arranged on the controller.

7. The electrically controlled locking structure according to claim 6, characterized in that: The transmission member includes a driving gear and a gear set. The driving gear is coaxially connected to the driving shaft of the driving motor. The gear set is installed on a fixed seat, and one end of the gear set is meshed with the driving gear. The gear set is provided with a driven gear connected to the rotating member.

8. The electrically controlled locking structure according to claim 7, characterized in that: The fixing seat is provided with an end cover, which covers the transmission member on the fixing seat so that the transmission member is arranged between the fixing seat and the end cover, and the driving motor is installed on the end cover.

9. Electric locking telescopic rod, characterized in that: The invention comprises an inner tube, an outer tube and an electrically controlled locking structure as claimed in any one of claims 1 to 8, wherein the inner tube and the outer tube are both made of hollow tubes, the inner tube is inserted into the outer tube and can slide along the axial direction of the outer tube, one end of the inner tube close to the outer tube is connected to a fixing seat, and the end of the fixing seat connected with the locking piece is exposed and arranged outside the inner tube; In the locked state, when the electric control unit drives the rotating member to rotate through the transmission member, the wedge block moves toward the inner tube under the drive of the rotating member, and drives the locking member to be squeezed and opened toward the outside of the fixed seat, so that the outer side surface of the locking member and the inner wall of the outer tube generate friction and tension, thereby completing the locking action of the inner tube and the outer tube; In the unlocked state, when the electric control unit drives the rotating member to rotate through the transmission member, the wedge block moves toward the outer tube under the drive of the rotating member, and drives the locking member to shrink and close toward the center of the fixed seat, so that the outer side surface of the locking member is separated from the inner wall of the outer tube, thereby completing the locking action of 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 a limiting screw sleeve for preventing the inner tube from slipping off from the inside of the outer tube.

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