Segmented multi-position one-key locking device

Abstract

This invention discloses a segmented multi-position one-button locking device, comprising: an outer tube; an inner tube, telescopically mounted on the outer tube, with a locking element at its upper end; a drive rod, passing through the inner tube, with a drive element at its upper end; a seat, connected to the lower end of the drive rod, having a downward-opening movable cavity; a ball head, rotatably mounted in the movable cavity; a connecting rod, connected to the ball head, with its other end connected to a mounting seat, the mounting seat having a mounting stud; a rotating sleeve, rotating and moving up and down relative to the mounting seat; a clamping element, moving away from or towards the rotating sleeve via a threaded structure; a connecting seat, fixed to the lower end of the inner tube; and a torque transmission structure, located between the rotating sleeve and the mounting seat, capable of driving the mounting stud to connect the projector. By rotating only the rotating sleeve, the projector can be tightened to the mounting stud first, and then the ball head, the projector, and the inner and outer tubes can be locked, eliminating the need for high-altitude work, greatly simplifying the operation steps, and providing a large locking force for the projector.

Description

Technical Field

[0001] This invention relates to the field of projection equipment technology, and in particular to a segmented multi-position one-button locking device. Background Technology

[0002] In projection operations, to meet the requirements of height adjustment and angle deflection of the projector, the projection bracket includes a ceiling-mounted base, a telescopic tube connected to the ceiling-mounted base, and a pan-tilt unit connected to the lower end of the telescopic tube. The pan-tilt unit is equipped with a ball joint connecting rod for mounting the projector. The pan-tilt unit includes a base body with an open spherical cavity inside. The ball joint connecting rod's ball joint rotatably resides within the spherical cavity, and the connecting rod extends along the opening of the spherical cavity to connect to the projector. A threaded push rod is provided on the side of the base body, the end of which abuts against the ball joint to lock the ball joint into the opening of the spherical cavity. The telescopic tube includes an inner tube and an outer tube, which are locked together by a locking structure.

[0003] Because relying solely on the locking force between the ball head and the opening edge of the spherical cavity is insufficient to handle the large loads exerted by the projector on the connecting rod, especially when the connecting rod is long, the gravitational torque of the projector's reaction force on the ball head is significant, making the ball head prone to rotation relative to the spherical cavity. Therefore, in some related technologies, an additional locking mechanism is installed between the pan-tilt unit and the projector.

[0004] In actual use, the locking mechanisms for securing the ball joint of the ball joint using the threaded jack, the locking structure between the inner and outer tubes, and the locking mechanism between the pan-tilt unit and the projector are all independent of each other, making the usage process very cumbersome. Moreover, placing the locking structure of the telescopic tube above the pan-tilt unit requires high-altitude operations for projectors installed on very high floors, affecting safety and convenience. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a segmented multi-position one-button locking device, which can lock the ball head, tighten the projector, and lock the inner and outer tubes with one click. This eliminates the need for high-altitude operations, greatly simplifies the operation steps, and provides a large locking force to the projector to achieve a stable installation effect.

[0006] According to an embodiment of the present invention, a segmented multi-position one-button locking device includes: an outer tube; an inner tube, which is telescopically slidably disposed within the outer tube, the upper end of the inner tube being provided with a locking member capable of tightly fitting with the inner circumferential wall of the outer tube; a drive rod, which is movably disposed through the inner tube, the upper end of the drive rod being provided with a driving member capable of driving the locking member to lock or unlock onto the outer tube; a seat body, connected to the lower end of the drive rod, the seat body being provided with a downward-opening movable cavity; a ball head, rotatably disposed within the movable cavity; a connecting rod, one end of which is connected to the ball head, the connecting rod extending from the opening of the movable cavity, the other end of the connecting rod being connected to a mounting seat, the mounting seat being provided with a mounting stud for connecting a projector; a rotating sleeve, capable of rotating and lifting relative to the mounting seat; and a clamping member, which is connected to the interior of the rotating sleeve via a threaded structure, capable of relative to... The rotating sleeves move in opposite directions or towards each other; the connecting seat is fixedly disposed at the lower end of the inner tube and can move up and down relative to the seat body; the torque transmission structure is disposed between the rotating sleeve and the mounting seat; when the rotating sleeve rotates around the first clockwise direction, the torque transmission structure drives the mounting stud on the mounting seat to rotate together to connect the projector; when the rotating sleeve continues to rotate around the first clockwise direction, the rotating sleeve and the clamping member move in opposite directions; the lower end of the rotating sleeve presses down against the projector and drives the drive rod to move down relative to the inner tube, so that the drive member drives the locking member to lock onto the outer tube, while the clamping member abuts upward against the connecting seat to keep the surface of the ball head pressed against the opening edge of the movable cavity.

[0007] The segmented multi-position one-button locking device according to embodiments of the present invention has at least the following beneficial effects: Before installing the projector, the user can adjust the relative height between the inner and outer tubes, and adjust the angle of the mounting base relative to the base body using the ball joint and connecting rod. Then, align the threaded mounting hole on the projector with the mounting stud or pre-tighten it by a certain angle. The rotating sleeve rotates around the first clockwise direction, and through the torque transmission structure, it drives the mounting stud to tighten onto the projector. That is, the torque transmission structure provides a fixed torque to connect the projector. When the rotating sleeve continues to rotate around the first clockwise direction, the locking force between the mounting stud and the projector is greater than the torque that the torque transmission structure can transmit. At this time, the rotating sleeve is relatively aligned with the mounting base, the clamping member, and the base body. When rotation occurs, the rotating sleeve and the clamping member move in opposite directions through the threaded structure. The lower end of the rotating sleeve presses downward against the projector and drives the drive rod to move downward relative to the inner tube through the connecting rod and ball head. This causes the drive member to drive the locking member to lock onto the outer tube. At the same time, the clamping member presses upward against the connecting seat to keep the surface of the ball head pressed against the opening edge of the movable cavity. By rotating only one part, the rotating sleeve, the projector can be tightened to the mounting stud first, and then the ball head, the projector, and the inner and outer tubes can be locked. This eliminates the need for high-altitude work, greatly simplifies the operation steps, improves the user experience, and provides a large locking force to the projector to achieve a stable installation effect.

[0008] In some embodiments of the present invention, the torque transmission structure includes a first compression spring, an abutment member, and a torque ring. The torque ring is disposed on the inner peripheral wall of the rotating sleeve. The outer peripheral wall of the mounting base is recessed and provided with a telescopic groove. The abutment member reciprocates along the telescopic groove to extend or retract relative to the outer peripheral wall of the mounting base. The first compression spring is located within the telescopic groove and drives the abutment member to spring against the inner peripheral wall of the torque ring. The force between the inner peripheral wall of the torque ring and the abutment member can drive the rotating sleeve and the mounting base to rotate together. When the rotating sleeve rotates relative to the mounting base, the abutment member moves up and down relative to the torque ring.

[0009] In some embodiments of the present invention, the inner peripheral wall of the torsion ring is recessed and formed with a plurality of snap-fit ​​grooves arranged circumferentially around its axial direction. The snap-fit ​​grooves extend along the height direction of the torsion ring. The abutting member is a ball. The cross-section of the snap-fit ​​groove is a semi-circle with the opening facing the ball. All the snap-fit ​​grooves are connected in sequence to form a quincunx pattern. The first compression spring drives the ball to elastically abut against one of the snap-fit ​​grooves. When the torque applied to the rotating sleeve is greater than the maximum force between the ball and the snap-fit ​​groove, the rotating sleeve rotates relative to the mounting base to make the ball sequentially enter and exit each of the snap-fit ​​grooves and move along the extension direction of the snap-fit ​​groove.

[0010] In some embodiments of the present invention, the rotating sleeve has an internal threaded hole, the clamping member includes a threaded post that mates with the internal threaded hole, a guide rod hole is provided through the middle of the threaded post along its length, the connecting rod is movably inserted through the guide rod hole, the cross-sectional shape of the guide rod hole and the connecting rod are the same and both are non-circular, and one end of the threaded post is provided with a pressing part that abuts against the connecting seat.

[0011] In some embodiments of the present invention, the middle part of the connecting seat is provided with a sliding channel for the seat body to slide up and down, the pressing part has an arc-shaped concave surface facing the connecting seat, and the outer periphery of the connecting seat abuts against the arc-shaped concave surface so that the rotating sleeve, the clamping member and the mounting seat deflect together relative to the seat body.

[0012] In some embodiments of the present invention, the movable cavity has a first spherical concave surface adapted to the ball head, the connecting seat has a spherical convex surface facing the pressing part, the arc-shaped concave surface is a second spherical concave surface that fits against the spherical convex surface, and the centers of the first spherical concave surface and the second spherical concave surface coincide.

[0013] In some embodiments of the present invention, the seat body includes a cylindrical tube, the inner diameter of which matches the outer diameter of the ball head, the lower part of which has a radially inwardly narrowed opening to form the opening of the movable cavity, and the lower end of the cylindrical tube has a frustum-shaped channel communicating with the narrow opening.

[0014] In some embodiments of the present invention, the drive rod is a hollow tube, and the lower end of the hollow tube is threadedly connected and fixed to the upper end of the cylindrical tube.

[0015] In some embodiments of the present invention, the locking member is an expansion sleeve, the expansion sleeve having multiple arc-shaped plates circumferentially distributed around the central axis of the inner tube at intervals, the driving member being located inside the expansion sleeve, the upper outer peripheral wall of the driving member having a first frustum inclined surface that is wider at the top and narrower at the bottom, the inner peripheral walls of the arc-shaped plates all having driving inclined surfaces that abut against the first frustum inclined surface, the first frustum inclined surface moving downward along the driving inclined surface to cause the arc-shaped plates to expand outward against the inner peripheral wall of the outer tube.

[0016] In some embodiments of the present invention, the middle part of the rotating sleeve is provided with an installation channel through it along its axial direction, and the base, the clamping member, and the mounting seat are arranged sequentially from top to bottom along the installation channel. When the rotating sleeve rotates so that the clamping member moves upward and closes to the connecting seat, the lower end of the rotating sleeve abuts against the projector downward so that the mounting seat is received within the installation channel.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of one embodiment of the segmented multi-position one-key locking device of the present invention; Figure 2 for Figure 1 A cross-sectional schematic diagram of an embodiment; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 for Figure 1 Schematic diagram of the structural breakdown of the embodiment; Figure 5 for Figure 4 A schematic diagram from another perspective showing that the locking component and the driving component are separated.

[0019] Figure label: Outer tube 100; Inner tube 200; Connecting seat 210; Spherical convex surface 220; Locking component 300; Arc plate 310; Driving inclined surface 320; Driving rod 400; Driving component 410; First frustum inclined surface 420; Second compression spring 430; Seat body 500; Movable cavity 510; First spherical concave surface 511; Ball head 600; Connecting rod 610; Mounting seat 620; Mounting stud 630; Rotating sleeve 700; Internal threaded hole 710; Tightening component 800; Threaded stud 810; Second spherical concave surface 820; Guide rod hole 830; Torque transmission structure 900; First compression spring 910; Abutment component 920; Torque ring 930; Snap-fit ​​groove 931. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] See Figures 1 to 5The segmented multi-position one-button locking device of this invention includes: an outer tube 100; an inner tube 200, which is telescopically slidably disposed within the outer tube 100, and the upper end of the inner tube 200 is provided with a locking member 300 that can be tightly fitted with the inner peripheral wall of the outer tube 100; a drive rod 400, which is movably disposed within the inner tube 200, and the upper end of the drive rod 400 is provided with a drive member 410 that can drive the locking member 300 to lock or unlock to the outer tube 100; and a seat 500, which is connected to the lower end of the drive rod 400, and the seat 500 is provided with a downward-facing movable... A movable cavity 510; a ball head 600 rotatably disposed within the movable cavity 510; a connecting rod 610, one end of which is connected to the ball head 600, the connecting rod 610 extending from the opening of the movable cavity 510, the other end of which is connected to a mounting base 620, the mounting base 620 being provided with mounting studs 630 for connecting a projector; a rotating sleeve 700 capable of rotating and moving up and down relative to the mounting base 620; and a clamping member 800 connected to the rotating sleeve 700 via a threaded structure. The inner tube 200 is capable of moving relative to the rotating sleeve 700, either facing or away from it. A connecting seat 210, fixedly located at the lower end of the inner tube 200, is capable of vertical movement relative to the seat 500. A torque transmission structure 900 is located between the rotating sleeve 700 and the mounting seat 620. When the rotating sleeve 700 rotates in a first clockwise direction, the torque transmission structure 900 drives the mounting studs 630 on the mounting seat 620 to rotate together to connect the projector. As 700 continues to rotate around the first clockwise direction, the rotating sleeve 700 and the clamping member 800 move in opposite directions. The lower end of the rotating sleeve 700 presses downward against the projector and drives the drive rod 400 to move downward relative to the inner tube 200, so that the drive member 410 drives the locking member 300 to lock onto the outer tube 100. At the same time, the clamping member 800 abuts upward against the connecting seat 210 to keep the surface of the ball head 600 pressed against the opening edge of the movable cavity 510.

[0025] Before installing the projector, the user can adjust the relative height between the inner tube 200 and the outer tube 100, and adjust the tilt angle of the mounting base 620 relative to the base 500 using the ball joint 600 and connecting rod 610. Then, align the threaded mounting hole on the projector with the mounting stud 630 or pre-tighten it by a certain angle. The rotating sleeve 700 rotates around the first clockwise direction, and the torque transmission structure 900 drives the mounting stud 630 to tighten onto the projector. That is, the torque transmission structure 900 provides a fixed torque to connect the projector. When the rotating sleeve 700 continues to rotate around the first clockwise direction, the locking force between the mounting stud 630 and the projector is greater than the torque that the torque transmission structure 900 can transmit. At this time, the rotating sleeve 700 relative to the mounting base 620, the clamping member 800, and the base 500 all exert force. The rotating sleeve 700 and the clamping member 800 move in opposite directions through a threaded structure. The lower end of the rotating sleeve 700 presses down against the projector and drives the drive rod 400 to move downward relative to the inner tube 200 through the connecting rod 610 and the ball head 600. This causes the drive member 410 to drive the locking member 300 to lock onto the outer tube 100. At the same time, the clamping member 800 abuts upward against the connecting seat 210 to keep the surface of the ball head 600 pressed against the opening edge of the movable cavity 510. By rotating only the rotating sleeve 700, the projector can be tightened onto the mounting stud 630 first, and then the ball head 600, the projector, and the inner tube 200 and the outer tube 100 can be locked. This eliminates the need for high-altitude work, greatly simplifies the operation steps, improves the user experience, and provides a large locking force to the projector to achieve a stable installation effect. Among them, the threaded mounting hole of the projector is connected to the mounting stud 630, the ball head 600 is pressed against the opening edge of the movable cavity 510, the lower end of the rotating sleeve 700 presses against the projector, and the locking inner tube 200 and outer tube 100 are in four different positions respectively. Only rotating the rotating sleeve 700 can lock or fix the components in four different positions.

[0026] See Figure 3 and Figure 4 In some embodiments of the present invention, the torque transmission structure 900 includes a first compression spring 910, an abutment member 920, and a torque ring 930. The torque ring 930 is disposed on the inner peripheral wall of the rotating sleeve 700. The outer peripheral wall of the mounting base 620 is recessed with a telescopic groove. The abutment member 920 reciprocates along the telescopic groove to extend or retract relative to the outer peripheral wall of the mounting base 620. The first compression spring 910 is located within the telescopic groove and drives the abutment member 920 to spring against the inner peripheral wall of the torque ring 930. The force between the inner peripheral wall of the torque ring 930 and the abutment member 920 can drive the rotating sleeve 700 and the mounting base 620 to rotate together. When the rotating sleeve 700 rotates relative to the mounting base 620, the abutment member 920 moves up and down relative to the torque ring 930.

[0027] It should be noted that the rotation center lines of the rotating sleeve 700 and the mounting base 620 are coaxial. The first compression spring 910 drives the abutment 920 to extend outward along the telescopic groove and abut against the inner circumferential wall of the torque ring 930. The user can align the threaded mounting hole on the projector with the mounting stud 630 and pre-tighten it by a certain angle. Then, the user can rotate the rotating sleeve 700, which utilizes the interaction force such as friction or clamping force between the torque ring 930 and the abutment 920 to drive the mounting base 620 to rotate together, thereby tightening the mounting stud 630 onto the projector. When the mounting stud 630 can no longer be tightened to the projector, the rotating sleeve 700 spirals down relative to the mounting base 620. The rotating sleeve 700 and the clamping member 800 move in opposite directions through the threaded structure. The lower end of the rotating sleeve 700 directly abuts against the projector, while the clamping member 800 pushes the inner tube 200 on the connecting base 210 to move upward relative to the outer tube 100 and the drive rod 400. Correspondingly, the ball head 600 and the connecting rod 610 move downward relative to the base 500, so that the surface of the ball head 600 presses downward against the opening edge of the movable cavity 510.

[0028] See Figure 3 and Figure 4 In some embodiments of the present invention, the inner peripheral wall of the torsion ring 930 is recessed and formed with a plurality of locking grooves 931 arranged circumferentially around its axial direction. The locking grooves 931 extend along the height direction of the torsion ring 930. The abutment member 920 is a ball. The cross-section of the locking groove 931 is a semi-circle with the opening facing the ball. All the locking grooves 931 are connected in sequence to form a quincunx pattern. The first compression spring 910 drives the ball to elastically abut against one of the locking grooves 931. When the torque applied to the rotating sleeve 700 is greater than the maximum force between the ball and the locking groove 931, the rotating sleeve 700 rotates relative to the mounting base 620 so that the ball sequentially enters and exits each of the locking grooves 931 and moves along the extension direction of the locking groove 931. Understandably, under the push of the first compression spring 910, the abutment 920 is elastically engaged in a locking groove 931. At this time, when the rotating sleeve 700 is rotated, the side wall of the locking groove 931 drives the abutment 920 to rotate together with the torque ring 930 with a large force, which helps to prevent the rotating sleeve 700 from slipping relative to the mounting base 620 before the mounting stud 630 is tightened to the projector. Moreover, while achieving a large torque transmission, and with the locking force between the mounting stud 630 and the projector being greater than the maximum transmittable torque, the goal of rotating the rotating sleeve 700 relative to the mounting base 620 can also be achieved. Furthermore, when the abutment 920 is elastically engaged in the locking groove 931 under the action of the first compression spring 910, it has an audible reminder function.

[0029] Furthermore, it should be noted that the maximum torque that the torque transmission structure 900 can transmit can be adjusted by adjusting the elastic coefficient of the first compression spring 910 or by changing the design depth of the snap-fit ​​groove 931. The structure of the torque transmission structure 900 simplifies the debugging process during the manufacturing and product adaptation process.

[0030] See Figure 2 , Figure 3 and Figure 4 In some embodiments of the present invention, the rotating sleeve 700 is provided with an internal threaded hole 710, the clamping member 800 includes a threaded post 810 that mates with the internal threaded hole 710, a guide rod hole 830 is provided through the middle of the threaded post 810 along its length direction, the connecting rod 610 is movably inserted through the guide rod hole 830, the cross-sectional shape of the guide rod hole 830 and the connecting rod 610 are the same and both are non-circular, and one end of the threaded post 810 is provided with a pressing part that abuts against the connecting seat 210. It should be noted that before the projector's threaded mounting hole is tightened onto the mounting stud 630, the rotating sleeve 700, mounting base 620, connecting rod 610, and clamping member 800 rotate together as a whole relative to the base 500. When the locking force between the mounting stud 630 and the projector exceeds the torque transmittance of the torque transmission structure 900, the mounting base 620 cannot rotate, and the rotating sleeve 700 can then rotate relative to the mounting base 620 and the clamping member 800. With the cooperation of the internal threaded hole 710 and the threaded stud 810, the rotating sleeve 700 and the clamping member 800... The clamping member 800 moves helically in opposite directions until the lower end of the rotating sleeve 700 contacts the projector. The connecting rod 610 can then move along the guide rod hole 830. The clamping member 800 moves upward relative to the seat 500 and connecting seat 210, causing the inner tube 200 to move upward relative to the drive rod 400. Conversely, the projector is subjected to downward pressure, dragging the connecting rod 610, ball head 600, seat 500, and drive rod 400 downward relative to the inner tube 200. This creates a tendency for the ball head 600 and the opening edge of the movable cavity 510 to press against each other. In this embodiment, the cross-sectional shape of the connecting rod 610 and the cross-sectional shape of the guide rod hole 830 are both regular polygons. When the rotating sleeve 700 rotates relative to the clamping member 800, it does not cause the clamping member 800 to rotate.

[0031] See Figure 3In some embodiments of the present invention, the connecting seat 210 has a sliding channel in the middle for the seat body 500 to slide up and down, and the pressing part has an arc-shaped concave surface facing the connecting seat 210. The outer periphery of the connecting seat 210 abuts against the arc-shaped concave surface so that the rotating sleeve 700, the clamping member 800, and the mounting seat 620 deflect together relative to the seat body 500. It should be noted that when the ball head 600 deflects relative to the movable cavity 510, the clamping member 800 also deflects relative to the connecting seat 210. The arc-shaped concave surface avoids interference between the clamping member 800 and the connecting seat 210, meets the requirements for angle adjustment, and can also transmit the thrust of the clamping member 800 to the connecting seat 210.

[0032] See Figure 3 In some embodiments of the present invention, the movable cavity 510 has a first spherical concave surface 511 adapted to the ball head 600, the connecting seat 210 has a spherical convex surface 220 facing the pressing part, and the arc-shaped concave surface is a second spherical concave surface 820 that fits against the spherical convex surface 220, and the centers of the first spherical concave surface 511 and the second spherical concave surface 820 coincide.

[0033] See Figure 2 and Figure 3 In some embodiments of the present invention, the base 500 includes a cylindrical tube, the inner diameter of which matches the outer diameter of the ball head 600. The lower part of the cylindrical tube has a radially inwardly narrow opening to form the opening of the movable cavity 510. The lower end of the cylindrical tube has a frustum-shaped channel communicating with the narrow opening. It is understood that this type of base 500 is easy to manufacture and can be directly produced through methods such as integral injection molding, integral casting, powder metallurgy, and machining. It also allows for easy control of the surface precision of the movable cavity 510 and features lightweight construction. The frustum-shaped channel opening of the movable cavity 510 allows the connecting rod 610 to swing at a large angle relative to the base 500, meeting the angle adjustment requirements of the projector.

[0034] See Figure 3 In some embodiments of the present invention, the drive rod 400 is a hollow tube, and the lower end of the hollow tube is threadedly connected and fixed to the upper end of the cylindrical tube. It is understood that using a hollow tube for the drive rod 400 is beneficial for further weight reduction. Furthermore, the threaded connection between the lower end of the hollow tube and the upper end of the cylindrical tube simplifies the installation of the ball head 600 into the movable cavity 510. During assembly, it is only necessary to first connect the ball head 600 and the connecting rod 610 together, then place the ball head 600 into the cylindrical tube, allowing the connecting rod 610 to extend downwards from the frustum-shaped channel, and finally thread the upper end of the cylindrical tube to the lower end of the hollow tube.

[0035] See Figure 4 and Figure 5 In some embodiments of the present invention, the locking member 300 is an expansion sleeve, the expansion sleeve having multiple arc-shaped plates 310 circumferentially distributed around the central axis of the inner tube 200 at intervals, the driving member 410 being located inside the expansion sleeve, the upper outer peripheral wall of the driving member 410 having a first frustum inclined surface 420 that is wider at the top and narrower at the bottom, the inner peripheral walls of the arc-shaped plates 310 having driving inclined surfaces 320 that abut against the first frustum inclined surface 420, the first frustum inclined surface 420 moving downward along the driving inclined surface 320 causing the arc-shaped plates 310 to expand outward against the inner peripheral wall of the outer tube 100. Understandably, when the first frustum 420 moves downward relative to all the arc plates 310, the upper end of the arc plate 310 moves to the upper end of the first frustum 420, and the arc plate 310 then undergoes elastic deformation, moving towards the inner circumferential wall of the outer tube 100. The travel of the elastic deformation of all the arc plates 310 is consistent. With the inner tube 200 and the outer tube 100 locked, the driving member 410 prevents the arc plate 310 from recovering its elastic deformation. The driving slope 320 matches the slope of the first frustum 420, and the close contact between the driving slope 320 and the first frustum 420 increases the contact area between them, preventing the arc plate 310 from only experiencing localized force and failing to form an overall radially outward elastic deformation. A second compression spring 430 is provided between the driving component 410 and the expansion sleeve. The second compression spring 430 is used to drive the driving rod 400 to move upward relative to the inner tube 200 to reset, so that the inner tube 200 and the outer tube 100 can be retracted and accommodated.

[0036] See Figure 2 and Figure 3 In some embodiments of the present invention, a mounting channel is provided through the middle of the rotating sleeve 700 along its axial direction. The base 500, the clamping member 800, and the mounting seat 620 are arranged sequentially from top to bottom along the mounting channel. When the rotating sleeve 700 rotates to bring the clamping member 800 upward toward the connecting seat 210, the lower end of the rotating sleeve 700 abuts against the projector downward so that the mounting seat 620 is accommodated within the mounting channel. This structure allows all components to be housed within the mounting channel of the rotating sleeve 700, which is beneficial for structural compactness and miniaturization.

[0037] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A segmented multi-position one-key locking device, characterized in that, include: Outer tube (100); The inner tube (200) is telescopically slidably disposed inside the outer tube (100), and the upper end of the inner tube (200) is provided with a locking member (300) that can be tightly fitted with the inner peripheral wall of the outer tube (100). A drive rod (400) is movably inserted through the inner tube (200), and the upper end of the drive rod (400) is provided with a drive member (410) that can drive the locking member (300) to lock or unlock to the outer tube (100). A seat (500) is connected to the lower end of the drive rod (400), and the seat (500) is provided with a downward-opening movable cavity (510). The ball head (600) is rotatably disposed within the movable cavity (510); A connecting rod (610) is connected at one end to the ball head (600), and the connecting rod (610) extends out from the opening of the movable cavity (510). The other end of the connecting rod (610) is connected to a mounting base (620), and the mounting base (620) is provided with a mounting stud (630) for connecting the projector. The rotating sleeve (700) is capable of rotating and moving up and down relative to the mounting base (620); The clamping member (800) is connected to the inside of the rotating sleeve (700) by a threaded structure and can move relative to the rotating sleeve (700) in opposite directions or towards each other; The connecting seat (210) is fixedly disposed at the lower end of the inner tube (200) and can move up and down relative to the seat body (500); A torque transmission structure (900) is disposed between the rotating sleeve (700) and the mounting base (620); When the rotating sleeve (700) rotates around the first clockwise direction, the torque transmission structure (900) drives the mounting stud (630) on the mounting base (620) to rotate together to connect the projector. When the rotating sleeve (700) continues to rotate around the first clockwise direction, the rotating sleeve (700) and the clamping member (800) move in opposite directions. The lower end of the rotating sleeve (700) presses down against the projector and drives the drive rod (400) to move downward relative to the inner tube (200), so that the drive member (410) drives the locking member (300) to lock onto the outer tube (100). At the same time, the clamping member (800) abuts upward against the connecting seat (210) to keep the surface of the ball head (600) pressed against the opening edge of the movable cavity (510).

2. The segmented multi-position one-key locking device according to claim 1, characterized in that: The torque transmission structure (900) includes a first compression spring (910), an abutment (920), and a torque ring (930). The torque ring (930) is disposed on the inner peripheral wall of the rotating sleeve (700). The outer peripheral wall of the mounting base (620) is recessed with a telescopic groove. The abutment (920) reciprocates along the telescopic groove to extend or retract relative to the outer peripheral wall of the mounting base (620). The first compression spring (910) is located at... The telescopic groove drives the abutment (920) to spring against the inner peripheral wall of the torsion ring (930). The force between the inner peripheral wall of the torsion ring (930) and the abutment (920) can drive the rotating sleeve (700) and the mounting base (620) to rotate together. When the rotating sleeve (700) rotates relative to the mounting base (620), the abutment (920) moves up and down relative to the torsion ring (930).

3. The segmented multi-position one-key locking device according to claim 2, characterized in that: The inner circumferential wall of the torsion ring (930) is recessed and formed with a plurality of locking grooves (931) arranged circumferentially around its axial direction. The locking grooves (931) extend along the height direction of the torsion ring (930). The abutment (920) is a ball. The cross-section of the locking groove (931) is a semi-circle with the opening facing the ball. All the locking grooves (931) are connected in sequence to form a plum blossom shape. The first compression spring (910) drives the ball to elastically abut against one of the locking grooves (931). When the torque applied to the rotating sleeve (700) is greater than the maximum force between the ball and the locking groove (931), the rotating sleeve (700) rotates relative to the mounting base (620) so that the ball enters and exits each locking groove (931) in sequence and moves along the extension direction of the locking groove (931).

4. The segmented multi-position one-key locking device according to claim 1, characterized in that: The rotating sleeve (700) has an internal threaded hole (710) inside. The clamping member (800) includes a threaded post (810) that mates with the internal threaded hole (710). A guide rod hole (830) is provided through the middle of the threaded post (810) along its length. The connecting rod (610) is movably inserted through the guide rod hole (830). The cross-sectional shapes of the guide rod hole (830) and the connecting rod (610) are the same and are both non-circular. One end of the threaded post (810) is provided with a pressing part that abuts against the connecting seat (210).

5. The segmented multi-position one-key locking device according to claim 4, characterized in that: The connecting seat (210) has a sliding channel in the middle for the seat body (500) to slide up and down. The pressing part has an arc-shaped concave surface facing the connecting seat (210). The outer periphery of the connecting seat (210) abuts against the arc-shaped concave surface so that the rotating sleeve (700), the clamping member (800) and the mounting seat (620) deflect together relative to the seat body (500).

6. The segmented multi-position one-key locking device according to claim 5, characterized in that: The movable cavity (510) has a first spherical concave surface (511) that is adapted to the ball head (600), the connecting seat (210) has a spherical convex surface (220) facing the pressing part, and the arc-shaped concave surface is a second spherical concave surface (820) that fits against the spherical convex surface (220).

7. The segmented multi-position one-key locking device according to claim 1, characterized in that: The seat (500) includes a cylindrical tube, the inner diameter of which matches the outer diameter of the ball head (600). The lower part of the cylindrical tube has a narrow opening that narrows radially inward to form the opening of the movable cavity (510). The lower end of the cylindrical tube has a frustum-shaped channel that connects to the narrow opening.

8. The segmented multi-position one-key locking device according to claim 7, characterized in that: The drive rod (400) is a hollow tube, and the lower end of the hollow tube is threadedly connected and fixed to the upper end of the cylindrical tube.

9. The segmented multi-position one-key locking device according to claim 1, characterized in that: The locking member (300) is an expansion sleeve. The expansion sleeve has multiple arc-shaped plates (310) that are circumferentially distributed around the central axis of the inner tube (200). The driving member (410) is located inside the expansion sleeve. The upper outer peripheral wall of the driving member (410) is provided with a first frustum inclined surface (420) that is wider at the top and narrower at the bottom. The inner peripheral walls of the arc-shaped plates (310) are all provided with driving inclined surfaces (320) that abut against the first frustum inclined surface (420). The first frustum inclined surface (420) moves downward along the driving inclined surface (320) to cause the arc-shaped plates (310) to expand outward against the inner peripheral wall of the outer tube (100).

10. The segmented multi-position one-key locking device according to claim 1, characterized in that: The rotating sleeve (700) has an installation channel extending through its center along its axial direction. The base (500), the clamping member (800), and the mounting seat (620) are arranged sequentially from top to bottom along the installation channel. When the rotating sleeve (700) rotates to bring the clamping member (800) upward toward the connecting seat (210), the lower end of the rotating sleeve (700) abuts against the projector downward so that the mounting seat (620) is accommodated within the installation channel.

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