A telescoping self-locking microphone stand

Abstract

The application provides a telescopic self-locking microphone support, which comprises a crossbar assembly, a tripod, an outer tube and a telescopic rod, the upper end of the telescopic rod is connected with the crossbar assembly, the lower end is slidably arranged in the outer tube, the lower end of the outer tube is connected with the tripod in a liftable manner, the lower end of the telescopic rod is provided with a locking piece and an actuating piece, a pull rod is arranged in the telescopic rod, the lower end of the pull rod is connected with the actuating piece, the upper end of the telescopic rod is provided with a pull buckle, the pull buckle is connected with the upper end of the pull rod, when the pull buckle is moved downward, the pull rod drives the actuating piece to move downward to drive the locking piece to move outward along the radial direction and abut against the inner wall of the outer tube, when the pull buckle is pulled upward, the pull rod drives the actuating piece to move upward to drive the locking piece to shrink inward along the radial direction to release the locking of the outer tube, and the telescopic rod and the outer tube are further provided with a limiting assembly for preventing relative rotation therebetween. The telescopic self-locking microphone support disclosed by the application can be easily adjusted, the inner tube and the outer tube will not rotate during the adjustment process, and the overall structure is simple and low in cost.

Description

Technical Field

[0001] This invention relates to the field of microphone stand technology, and more specifically, to a telescopic self-locking microphone stand. Background Technology

[0002] Microphones are essential sound amplification tools for performers and speakers. To free up their hands, performers need to mount the microphone using a dedicated stand, allowing their hands to perform other activities. Furthermore, to better accommodate performers of different heights, most microphone stands are now designed with height adjustment.

[0003] For example, patent CN218041702U discloses a microphone stand where rotating a knob adjusts the rotation of a lever, which in turn rotates a gear. This gear then drives a meshing rack and connecting rod to move up and down, thereby raising and lowering a telescopic rod and allowing the microphone to be adjusted in height. While this type of stand allows for height adjustment, it is inconvenient, requiring manual rotation of the knob until the desired height is reached, which is time-consuming and laborious. Another example is patent CN209345341U, which discloses a microphone stand, device, and system. In use, a control unit receives a command to raise and lower the lifting component, controlling a motor to rotate. The motor rotates a belt, which in turn drives a potentiometer to reach the specified resistance value. The motor then stops rotating, achieving the desired height. This patent's structure uses an automated system for height adjustment. While this system is highly intelligent and allows for one-button start-up of the adjustment mechanism, it is structurally complex, has high manufacturing costs, and is difficult and costly to repair if the electric drive system malfunctions.

[0004] On the other hand, existing lifting brackets do not have a dedicated limiting structure between their relatively rotating inner and outer tubes. Currently, many brackets on the market usually have a crossbar assembly at the top of the telescopic rod. The microphone is ultimately fixed to the crossbar assembly, which protrudes significantly from the lifting rod and is set at an angle to it. Therefore, during use, accidental collisions with the crossbar assembly often cause the telescopic rod to rotate with the base, affecting the normal use of the microphone.

[0005] On the other hand, most microphone stands on the market are currently fixed to the ground by tripods, and the existing tripods are only used to provide support and have a single function. Summary of the Invention

[0006] The problem solved by this invention is to overcome at least one defect in the prior art and provide a telescopic self-locking microphone stand that can easily achieve height adjustment, and the inner and outer tubes will not rotate during the adjustment process, ensuring the stability of the microphone. Moreover, the overall structure is simple and the cost is low.

[0007] To address the aforementioned problems, this invention provides a telescopic self-locking microphone stand, comprising a crossbar assembly, a telescopic tube assembly, and a tripod arranged from top to bottom. The telescopic tube assembly includes an outer tube and a telescopic rod. The upper end of the telescopic rod is connected to the crossbar assembly, and the lower end of the telescopic rod is slidably fitted into the outer tube. The lower end of the outer tube is vertically connected to the tripod. The lower end of the telescopic rod is provided with several radially movable locking elements and axially slidable actuators. A vertically slidable pull rod passes through the telescopic rod, and the lower end of the pull rod is connected to the actuators. Next, a vertically slidable buckle is provided on the side wall of the upper end of the telescopic rod, and the buckle is connected to the upper end of the pull rod. When the buckle is pulled downward, the pull rod drives the actuator to move downward, so that the locking member moves radially outward and abuts against the inner wall of the outer tube to lock the telescopic rod and the outer tube. When the buckle is pulled upward, the pull rod drives the actuator to move upward, so that the locking member retracts radially inward to release the lock between the telescopic rod and the outer tube. A limiting component is also provided between the telescopic rod and the outer tube to prevent relative rotation between the two.

[0008] The advantages of this invention compared to the prior art are:

[0009] The telescopic self-locking microphone bracket structure of the present invention uses a radially movable locking member on the outer periphery of the telescopic rod. When the locking block moves radially outward, it abuts against and limits the inner wall of the outer tube, thus locking the two. When the locking block retracts radially inward, its radial outer end disengages from the inner wall of the outer tube, allowing the telescopic rod to move up and down relative to the outer tube for height adjustment. Furthermore, the radial movement of the locking member is driven by an actuator, a pull rod, and a latch. When the latch is moved downward, the pull rod moves downward, causing the actuator to move downward and driving the locking member to move radially outward, abutting against and limiting the inner wall of the outer tube, thus locking the telescopic rod and the outer tube. When the latch is pulled upward, the pull rod moves upward, causing the actuator to move upward and driving the locking member to retract radially inward, releasing the lock between the telescopic rod and the outer tube, allowing relative sliding between them. In the above structure, the user can easily lock or unlock the telescopic rod and outer tube by pressing down or pulling the buckle with one hand, thus adjusting the height of the component. The adjustment drive mechanism is simple, has a lower failure rate compared to existing electric drive mechanisms, and is easier and cheaper to maintain. Furthermore, in the telescopic tube assembly of this invention, a limiting component is provided between the telescopic rod and the outer tube, allowing them to move relative to each other axially but not circumferentially, ensuring the stability of the microphone. Moreover, in the microphone stand structure of this invention, a tripod is connected to the bottom of the telescopic tube assembly, and the height of the outer tube and the tripod can also be adjusted, further enriching the functionality of the tripod.

[0010] Furthermore, the telescopic rod is a hollow tube structure. The actuator includes a slider and an elastic element. The outer wall of the slider has a tapered surface. Several circumferentially distributed connecting holes are formed on the side wall of the lower end of the telescopic rod. Each locking element is radially movable and passes through each connecting hole, with its radial inner end guiding and engaging with the tapered surface. A protruding abutment is provided on the inner wall of the lower end of the telescopic rod. The upper end of the elastic element abuts against the abutment, and its lower end abuts against the upper surface of the slider. The elastic element drives the slider to always have a downward tendency, thereby ensuring that the other end of the locking element is always pressed against and limited against the inner wall of the outer tube. In this structure, with the elastic element, when the latch is not subjected to external force, the locking block can always abut against and limit itself against the inner wall of the outer tube, achieving self-locking between the telescopic rod and the outer tube. That is, no additional drive mechanism is needed when locking, resulting in a simple structure and low cost.

[0011] Preferably, the inner wall of the lower end of the telescopic rod is stamped with several circumferentially distributed and radially inwardly extending protrusions to form the abutment portion. In the above structure, the abutment portion is directly machined on the inner wall of the outer tube by stamping, eliminating the need for subsequent addition of a dedicated abutment component and simplifying the manufacturing process.

[0012] Furthermore, the pull buckle includes a sliding collar fitted onto the outer wall of the telescopic rod, and a movable lever is formed on the outer wall of the sliding collar. Two oblong through holes extending axially are symmetrically arranged on the side wall of the telescopic rod. A fixed pin passes radially through the sliding collar, with both ends of the fixed pin slidingly inserted into the two oblong through holes. The upper end of the pull rod is connected to the fixed pin. In this structure, the pull rod can be moved up and down via the fixed pin by moving the lever up and down, which is very convenient. Furthermore, the up and down movement of the lever is limited by the sliding collar, ensuring the smoothness of the pull buckle's up and down movement.

[0013] In a further improvement, a fixed collar is provided on the outer wall of the telescopic rod, above the sliding collar, and a fixed block is formed on the side wall of the fixed collar, corresponding vertically to the movable lever. In the above improved structure, by adding a fixed block above the movable lever, the user can place their thumb on the upper surface of the fixed block and then press their index finger against the movable lever, bringing the two fingers together to easily pull the movable lever upwards, which is effortless and convenient.

[0014] In a further improvement, a positioning sleeve is inserted into the top of the outer tube, and the telescopic rod slidably engages within the positioning sleeve. The inner wall of the positioning sleeve is formed with several circumferentially distributed positioning buckles, and the upper side wall of the outer tube is provided with several positioning grooves for the engagement of each positioning buckle. In this improved structure, the positioning sleeve covers the top of the outer tube, improving aesthetics; furthermore, the positioning sleeve and the outer tube have a positioning structure, making it less prone to detachment after installation and preventing circumferential rotation.

[0015] Furthermore, the limiting component includes at least one limiting protrusion protruding from the outer wall of the telescopic rod, and at least one limiting groove extending axially from the inner wall of the outer tube. The limiting protrusion is slidable along the axial direction of the telescopic rod but cannot rotate circumferentially within the corresponding limiting groove. In the above improved structure, circumferential limiting is achieved through the limiting block and the limiting groove, while axial sliding is possible. The structure is simple and easy to manufacture.

[0016] In a further improvement, the telescopic rod is a hollow tube, and at least one protrusion is stamped from the outside to the outside of the outer peripheral wall of the telescopic rod to form the limiting protrusion. In the above improved structure, the protrusion is directly processed on the outer wall of the telescopic rod through a stamping process, which is simple, convenient, and low in cost.

[0017] In a further improvement, the inner wall of the outer tube is formed with two protruding ridges, and a limiting groove is formed between the two ridges for sliding engagement of the limiting protrusion. In the above improved structure, by setting two protruding ridges to form the limiting groove, the structure is simple and the strength of the limiting groove is guaranteed.

[0018] Furthermore, the crossbar assembly includes a connector, a connecting tube, a knob, a locking block, and a locking sleeve. The locking sleeve and the knob are located on opposite sides of the connector. At least a portion of the locking block is located within the locking sleeve. A screw is connected to the locking block, passing sequentially through the locking sleeve and the connector, and threadedly connected to the knob. The locking block has a first through hole for accommodating the connecting tube, and the locking sleeve has a second through hole for accommodating the connecting tube. The connecting tube is inserted into the first and second through holes, and the locking mechanism has both a locked and a movable state by rotating the knob. In this structure, the angle and length of the connecting tube can be adjusted by rotating the knob, which is very convenient.

[0019] In a further improvement, the locking sleeve has a circular first groove on its end face near the connector, and the connector has a circular first protrusion. The inner wall of the first groove and the outer wall of the first protrusion are both conical surfaces with the same taper. The connector has a second groove on its end face near the locking sleeve, and the first protrusion is located on the bottom surface of the second groove. The outer wall of the locking sleeve near the connector is in contact with the inner wall of the second groove, and in the locked state, the inner wall of the first groove abuts against the outer wall of the first protrusion. In this improved structure, the locking sleeve and the connector are guided by the conical surface, ensuring smooth movement.

[0020] In a further improvement, a receiving cavity is provided on the side of the knob away from the connecting member, and an adjusting nut is provided on the bottom wall of the receiving cavity. The end of the screw away from the locking block passes through the locking sleeve and the connecting member in sequence and then engages with the adjusting nut. In the above improved structure, the screw is connected by providing an adjusting nut on the knob, ensuring the stability of the axial movement of the locking block and locking sleeve driven by the screw.

[0021] In a further improvement, the end of the screw furthest from the connector extends into the receiving groove, and an anti-loosening nut is fitted to the outside of the end of the screw located inside the receiving cavity; an end cap is fitted to the open end of the receiving cavity, and a limiting tube is formed at the end of the end cap near the receiving cavity for tight engagement with the anti-loosening nut. In the above improved structure, the loosening nut is designed to prevent excessive rotation of the knob from causing the screw to completely disengage from the adjusting nut, thus affecting subsequent use.

[0022] Furthermore, the tripod includes a base and three legs. The base has a through mounting hole, and the lower end of the outer tube is vertically and vertically inserted into the mounting hole. The three legs are connected to the outer periphery of the base and can be flipped vertically. At least one leg has a locking block at its end connected to the base. When the leg with the limiting cam is rotated vertically, the locking block abuts against or disengages from the outer wall of the outer tube. In the above improved structure, the locking block enables the tripod to provide both support and locking to the outer tube, allowing for height adjustment of the outer tube and thus achieving multifunctionality.

[0023] Preferably, the locking block is provided with a first cam portion and a second cam portion. When each of the legs rotates upward to the open state, the first cam portion abuts against and limits the outer peripheral wall of the outer tube; when each of the legs rotates downward to the retracted state, the second cam portion abuts against and limits the outer peripheral wall of the outer tube; when each of the legs is in a position between the open and retracted states, the outer tube can move up and down within the mounting hole. In the above improved structure, the locking of the outer tube in both open and retracted states, as well as the adjustment of the outer tube's positioning height, are cleverly achieved by switching the contact between the cam portion in two different positions and the outer tube wall. The structure is simple and the functions are rich.

[0024] Other improvements and advantages of the invention will be set forth in the detailed description that follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0025] Figure 1 This is a perspective view of the telescopic self-locking microphone holder of the present invention;

[0026] Figure 2 This is a perspective view of the connection structure between the outer tube and the telescopic rod in this invention;

[0027] Figure 3 This is an exploded structural diagram of the connection structure between the outer tube and the telescopic rod in this invention;

[0028] Figure 4 This is a cross-sectional view of the connection structure between the outer tube and the telescopic rod in this invention;

[0029] Figure 5 for Figure 4 Enlarged structural diagram at point A in the diagram;

[0030] Figure 6 for Figure 4 Enlarged structural diagram at point B in the diagram;

[0031] Figure 7 for Figure 4Enlarged structural diagram at point C;

[0032] Figure 8 for Figure 4 Enlarged structural diagram at point D in the diagram;

[0033] Figure 9 for Figure 4 Sectional view along the XX direction;

[0034] Figure 10 This is a three-dimensional structural diagram of the crossbar assembly in this invention;

[0035] Figure 11 This is a cross-sectional view of the crossbar assembly in this invention;

[0036] Figure 12 This is a structural diagram of the locking block in this invention;

[0037] Figure 13 This is a structural diagram of the locking sleeve in this invention;

[0038] Figure 14 This is a structural diagram of the connector in this invention;

[0039] Figure 15 This is another structural view of the connector in this invention;

[0040] Figure 16 This is a cross-sectional view of the tripod and outer tube connection structure in this invention; (showing the locking block in the open position of the legs).

[0041] Figure 17 This is a cross-sectional view of the tripod and outer tube connection structure in this invention from another perspective. (The legs are in the retracted state with the locking block set).

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Outer tube; 2. Telescopic rod; 3. Locking element; 4. Actuating element; 5. Pull rod; 6. Pull buckle; 7. Elastic element; 8. Tapered surface; 9. Communicating hole; 10. Abutting part; 11. Mounting through hole; 12. Threaded rod; 13. Locking nut; 14. Positioning hole; 15. Sliding collar; 16. Movable lever; 17. Waist-shaped through hole; 18. Fixed pin; 19. Fixed collar; 20. Fixed lever; 21. Positioning insertion hole; 22. Positioning insertion rod; 23. Positioning sleeve; 24. Positioning buckle; 25. Positioning groove; 26. Tripod; 27. Crossbar assembly; 28. 1. Limiting protrusion; 29. ​​Limiting slide groove; 30. Protrusion; 31. Base; 32. Support foot; 33. Mounting hole; 34. Locking block; 35. First cam part; 36. Second cam part; 37. Connecting piece; 38. Connecting pipe; 39. Knob; 40. Locking block; 41. Locking sleeve; 42. Screw; 43. First through hole; 44. Second through hole; 45. First groove; 46. First protrusion; 47. Second groove; 48. Third groove; 49. Second protrusion; 50. Fourth groove; 51. Third protrusion; 52. End cap; 53. Annular protrusion. Detailed Implementation

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0045] In the description of this invention, it should be noted that the terms "upper end", "lower end", "outer wall", "inner", "outer", etc., 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 limitations on this invention.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it 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.

[0047] like Figures 1-3As shown, the present invention provides a telescopic self-locking microphone stand, including a crossbar assembly 27, a telescopic tube assembly, and a tripod 26 arranged from top to bottom. The telescopic tube assembly includes an outer tube 1 and a telescopic rod 2. The upper end of the telescopic rod 2 is connected to the crossbar assembly 27, and the lower end of the telescopic rod 2 is slidably fitted in the outer tube 1. The lower end of the outer tube 1 is connected to the tripod in a height-adjustable manner. Specifically, a plurality of radially movable locking members 3 and an axially slidable actuator 4 are provided at the lower end of the telescopic rod 2. The actuator 4 and the locking members 3 are linked and cooperated. That is, when the actuator 4 moves down, it can drive each locking member 3 to move outward radially. When the actuator 4 moves upward, each locking member 3 retracts inward radially. Specifically, a pull rod 5 extending axially and capable of being raised and lowered is inserted inside the telescopic rod 2. The lower end of the pull rod 5 is connected to the actuator 4, and the actuator 4 is driven by the raising and lowering of the pull rod 5. A vertically slidable latch 6 is provided on the side wall of the upper end of the telescopic rod 2, and the latch 6 is connected to the upper end of the pull rod 5. When the latch 6 is moved downward, the pull rod 5 moves downward, causing the actuator 4 to move downward, so that the locking member 3 moves radially outward and abuts against the inner wall of the outer tube 1, thereby locking the telescopic rod 2 and the outer tube 1. When the latch 6 is pulled upward, the pull rod 5 moves upward, causing the actuator 4 to move upward, so that the locking member 3 retracts radially inward to release the locking between the telescopic rod 2 and the outer tube 1. At this time, the telescopic rod 2 and the outer tube 1 can slide relative to each other. In the above structure, the telescopic rod 2 and the outer tube 1 can be locked or released by pressing down or lifting the latch 6, realizing the height adjustment of the component, which is very convenient.

[0048] In this embodiment, as Figure 4 , 8As shown, preferably, the telescopic rod 2 is also a hollow tube structure. The actuator 4 includes a slider and an elastic element 7. A conical surface 8 is provided on the outer wall of the slider. Specifically, the conical surface 8 is a conical structure with a larger diameter at the top and a smaller diameter at the bottom. In addition, several circumferentially distributed connecting holes 9 are opened on the side wall of the lower end of the telescopic rod 2. Each locking element 3 is radially movable and passes through each connecting hole 9. The radial inner end of each locking element 3 is guided and engaged with the conical surface 8. The radial horizontal movement of the locking element 3 is achieved by the left and right movement of the conical surface 8. A protruding abutment part 10 is provided on the inner wall of the lower end of the telescopic rod 2. The upper end of the elastic element 7 abuts against the abutment part 10, and the lower end abuts against the upper end surface of the slider. In this structure, the elastic element 7 is used to drive the slider to always move downward. The trend drives the other end of the locking element 3 to always be pressed against the inner wall of the outer tube 1 for limitation. That is, in the initial state, the telescopic rod 2 and the outer tube 1 are always locked together and cannot move relative to each other. When it is necessary to adjust the height position of the telescopic rod 2 in the outer tube 1, the slider is pulled up by the pull rod 5 to overcome the force of the elastic element 7. After the slider moves up, under the action of the conical surface 8, each locking element 3 can retract radially, thereby releasing the abutment and limitation between it and the inner wall of the outer tube 1. At this time, the telescopic rod 2 can move relative to the outer tube 1. When the pull buckle 6 is released, under the action of the elastic force of the elastic element 7, the slider returns to its original position. The conical surface 8 on the slider drives the locking element 3 to move radially outward and press and limit it against the inner wall of the outer tube 1, thus achieving self-locking. In this embodiment, the locking element 3 is preferably a steel ball, and an annular baffle is provided on the outer wall of the slider at the lower end of the conical surface 8 to prevent the steel ball from falling due to excessive upward movement of the slider.

[0049] In the above structure, such as Figure 8 As shown, the slider and the lower end of the pull rod 5 are detachably connected. Specifically, the slider has an axially through mounting hole 11, and the lower end of the pull rod 5 slidably passes through the mounting hole 11. The lower end of the pull rod 5 is a threaded rod 12, and a locking nut 13 is fitted to the end of the threaded rod 12 that protrudes from the mounting hole 11. In this structure, the connection position between the slider and the pull rod 5 can be easily adjusted.

[0050] Furthermore, in the above structure, to simplify the manufacturing process and reduce costs, several circumferentially distributed and radially inwardly extending protrusions are formed on the inner wall of the lower end of the telescopic rod 2 by stamping. These protrusions form an abutment portion 10 for the upper end of the elastic element 7 to abut and limit its movement. In another aspect, to ensure the stability of the elastic element 7, a positioning hole 14 is recessed at the upper end of the slider, and the lower end of the elastic element 7 is limited and fitted within the positioning hole 14. Moreover, in this structure, the elastic element 7 is preferably a conical spring, and the conical spring is positioned with its larger diameter end at the upper end.

[0051] In this embodiment, as Figure 7As shown, the pull buckle 6 includes a sliding collar 15 fitted onto the outer wall of the telescopic rod 2, and a movable lever 16 protrudes from the outer wall of the sliding collar 15. Two symmetrically arranged oblong through holes 17 extending axially are provided on the side wall of the telescopic rod 2. A fixed pin 18 is radially inserted through the sliding collar 15, and both ends of the fixed pin 18 slide through the two oblong through holes 17 respectively. The upper end of the pull rod 5 is connected to the fixed pin 18. In this structure, the sliding collar 15 is slidably fitted onto the outside of the telescopic rod 2 via the horizontally arranged fixed pin 18, while the fixed pin 18 is connected to the upper end of the pull rod 5. When the height of the telescopic rod 2 needs to be adjusted, the lever is pushed upwards to move the outer sleeve upwards. Under the pulling action of the fixed pin 18, the pull rod 5 moves upwards synchronously, thereby moving the slider upwards, unlocking the steel ball from the inner wall of the outer tube 1, allowing the telescopic rod 2 to move up and down within the outer tube 1. In this structure, the fixing pin 18 is directly selected from standard fixing bolts, specifically, as follows: Figure 4 As shown, both the movable lever 16 and the fixed lever 20 are provided with receiving grooves, and connecting nuts are installed in the receiving grooves. The fixing bolts are inserted from the opposite side of the receiving grooves and then locked by the connecting nuts.

[0052] In the above structure, such as Figure 7 As shown, to provide a stable support point for the fingers when lifting the movable lever 16, a fixed collar 19 is provided on the outer wall of the telescopic rod 2, above the sliding collar 15. Furthermore, a fixed lever 20, corresponding vertically to the movable lever 16, is also protruding from the side wall of the fixed collar 19. With this configuration, when lifting the movable lever 16, the user can place their thumb on the upper surface of the fixed lever 20, and then press their index finger against the movable lever 16, bringing the two fingers together to easily lift the movable lever 16 upwards – effortless and convenient. More specifically, to ensure more flexible and less prone to jamming of the movable sleeve, a positioning hole 21 is formed at the upper end of the movable lever 16. Correspondingly, a positioning rod 22 is formed at the lower end of the fixed lever 20. The lower end of the positioning rod 22 slides within the positioning hole 21, providing a guiding function. In this structure, the positions of the positioning rod 22 and the positioning hole 21 can also be interchanged.

[0053] In this embodiment, to improve the aesthetics of the telescopic self-locking microphone bracket, a positioning sleeve 23 is inserted into the top of the outer tube 1, and the telescopic rod 2 is slidably fitted into the positioning sleeve 23, such as... Figure 9As shown; furthermore, a plurality of circumferentially distributed positioning buckles 24 are formed on the inner wall of the positioning sleeve 23, and a plurality of positioning grooves 25 are provided on the side wall of the upper end of the outer tube 1 for the positioning buckles 24 to engage. After this arrangement, the positioning sleeve 23 is not easy to detach from the outer tube 1 after insertion, and the stability is high. In addition, the positioning sleeve 23 in this structure is made of plastic material, and each positioning buckle 24 is integrally formed on its inner wall, which is simple in structure and easy to process.

[0054] On the other hand, such as Figure 8 , 9 As shown, in this embodiment, a limiting component is also provided between the telescopic rod 2 and the outer tube 1 to prevent relative rotation between the two. The limiting component includes a first limiting member disposed on the inner wall of the outer tube 1 and a second limiting member disposed on the outer wall of the telescopic rod 2. The second limiting member and the first limiting member are slidable along the axial direction of the telescopic rod 2 and cannot rotate relative to each other along its circumference.

[0055] Specifically, the outer wall of the telescopic rod 2 is provided with at least one outer retaining protrusion 28, and correspondingly, the inner wall of the outer tube 1 is provided with at least one retaining groove 29 extending along its axial direction. The retaining protrusion 28 is slidable along the axial direction of the telescopic rod 2 and cannot rotate along its circumference, fitting into the corresponding retaining groove 29.

[0056] In this embodiment, preferably, the telescopic rod 2 is a hollow tube, and at least one protrusion is stamped from the outside to the outside on the outer peripheral wall of the telescopic rod 2 to form a limiting protrusion 28, such as... Figure 5 As shown.

[0057] Furthermore, since the outer tube 1 is relatively thin, if a recessed limiting groove 29 is directly formed on its inner wall, the depth of the limiting groove 29 will be very small, resulting in a small contact area with the limiting protrusion 28 and a very small circumferential limiting force. Therefore, there is still a significant risk of rotation between the telescopic rod 2 and the outer tube 1. Figure 6 As shown, preferably, two protruding ribs 30 are formed on the inner wall of the outer tube 1, and a limiting groove 29 is formed between the two protruding ribs 30 for sliding engagement of the limiting protrusion 28. In this structure, the limiting groove 29 is directly integrally formed with the outer tube 1 without the need for subsequent processing, which simplifies the processing technology and reduces costs.

[0058] Other, such as Figures 10-15As shown, in this embodiment, the crossbar assembly 27 includes a connector 37, a connecting tube 38, a knob 39, a locking block 40, and a locking sleeve 41. The locking sleeve 41 and the knob 39 are located on both sides of the connector 37. At least a portion of the locking block 40 is located inside the locking sleeve 41. A screw 42 is connected to the locking block 40, and the screw 42 passes through the locking sleeve 41 and the connector 37 in sequence and is threadedly connected to the knob 39. The locking block 40 is provided with a first through hole 43 for accommodating the connecting tube 38, and the locking sleeve 41 is provided with a second through hole 44 for accommodating the connecting tube 38. The connecting tube 38 is inserted into the first through hole 43 and the second through hole 44. By rotating the knob 39, the locking mechanism has a locked state and an active state, so as to realize the locking and unlocking of the connecting tube 38.

[0059] In the locked state, both the knob 39 and the locking sleeve 41 abut against the connector 37, and the first through hole 43 and the second through hole 44 are misaligned so that the inner walls of the first through hole 43 and the second through hole 44 abut against the outer wall of the connecting pipe 38. Misalignment means that the first through hole 43 and the second through hole 44 are eccentrically positioned, with a horizontal distance between their centers. In this embodiment, the inner diameters of the first through hole 43 and the second through hole 44 are the same. The preferred misalignment position is that the first through hole 43 is closer to the connector 37 than the second through hole 44. That is, the inner wall of the first through hole 43 on the side away from the connector 37 and the inner wall of the second through hole 44 on the side closer to the connector 37 abut against the outer wall of the connecting pipe 38. Moreover, the misalignment between the first through hole 43 and the second through hole 44 does not necessarily have to be very obvious. The misalignment between the first through hole 43 and the second through hole 44 can be very small, as long as the inner walls of the first through hole 43 and the second through hole 44 abut against the outer wall of the connecting pipe 38.

[0060] In the active state, the locking sleeve 41 and the connecting member 37 can rotate relative to the connecting member 37, thereby adjusting the angle of the connecting tube 38. The locking block 40 moves relative to the locking sleeve 41, allowing the connecting tube 38 to slide within the first through hole 43 and the second through hole 44, achieving axial sliding of the connecting tube 38. To switch from the locked state to the active state, the knob 39 needs to be rotated and moved away from the connecting member 37. Once a gap is created between the knob 39 and the connecting member 37, a gap is also created between the locking sleeve 41 and the connecting member 37. This allows the locking block 40 and the locking sleeve 41 to move, thereby adjusting the relative position between the first through hole 43 and the second through hole 44. Preferably, the two are adjusted to be coaxial, allowing the connecting tube 38 to slide.

[0061] like Figure 11 , 14As shown in Figure 15, a first groove 45 is provided on the end face of the locking sleeve 41 near the connector 37, and a first protrusion 46 is connected to the connector 37. The cross-sections of the first groove 45 and the first protrusion 46 are both circular. The inner peripheral wall of the first groove 45 and the outer peripheral wall of the first protrusion 46 are both conical surfaces with the same taper. The inner diameter of the first groove 45 and the outer diameter of the first protrusion 46 gradually increase towards the knob 39. In the locked state, the inner peripheral wall of the first groove 45 abuts against the outer peripheral wall of the first protrusion 46. Furthermore, in the locked state, the end face of the first groove 45 abuts against the end face of the first protrusion 46; a second groove 47 is provided on the end face of the connector 37 near the locking sleeve 41, the first protrusion 46 is provided on the bottom surface of the second groove 47, and the outer peripheral wall of the locking sleeve 41 near the connector 37 is in contact with the inner peripheral wall of the second groove 47. In this embodiment, an annular groove is provided on the outer peripheral wall of the locking sleeve 41 near the connector 37, and the inner peripheral wall of the second groove 47 is in contact with the side wall of the annular groove.

[0062] like Figure 11 As shown, a third groove 48 is provided on the end face of the locking sleeve 41 away from the connector 37. At least a portion of the locking block 40 is located in the third groove 48, and the screw 42 passes through the connector 37 via the locking sleeve 41. In addition, a second protrusion 49 is connected to the outer wall of the locking block 40. The second protrusion 49 is located on the movement path of the locking sleeve 41 when it moves away from the connector 37. It should be noted that the second protrusion 49 being located on the movement path of the locking sleeve 41 when it moves away from the connector 37 refers to the state when the connecting tube 38 is not installed. In this embodiment, the second protrusion 49 is provided on the outer peripheral wall of the locking block 40 away from the connector 37, and the outer peripheral wall of the second protrusion 49 is flush with the outer peripheral wall of the locking sleeve 41. In some other embodiments, the second protrusion 49 may be provided on the outer peripheral wall of the middle part of the locking block 40, and a receiving groove for accommodating the second protrusion 49 is provided in the inner wall of the third groove 48 of the locking sleeve 41. In addition, in some other embodiments, the locking sleeve 41 may also be configured as a tubular structure.

[0063] like Figure 11 , 15 As shown, a fourth groove 50 is provided on the side of the connector 37 away from the locking sleeve 41, and a third protrusion 51 is formed on the end of the knob 39 near the connector 37 to cooperate with the fourth groove 50, so as to ensure the smoothness of the rotation axis movement.

[0064] like Figure 11As shown, a receiving cavity is provided on the side of the knob 39 away from the connector 37, and an adjusting nut is provided on the bottom wall of the receiving cavity. Specifically, an adjusting nut mounting cavity is provided at the bottom of the receiving cavity near the connector 37, and the adjusting nut is tightly fitted inside the adjusting nut mounting cavity. In other embodiments, the adjusting nut can be injection molded together with the knob 39. In addition, the end of the screw 42 away from the locking block 40 passes through the locking sleeve 41 and the connector 37 in sequence before engaging with the adjusting nut. Furthermore, the end of the screw 42 away from the connector 37 extends into the receiving groove. The outer side of the end of the screw 42 located in the receiving cavity is also equipped with an anti-loosening nut to prevent the screw 42 from completely disengaging from the adjusting nut when unlocking. An end cap 52 is equipped at the open end of the receiving cavity. Specifically, a limiting tube is formed at the end of the end cap 52 near the receiving cavity, which is inserted and fitted into the opening end of the receiving cavity. An anti-cavity groove is provided on the inner wall of the limiting tube, and several annular protrusions 53 are formed on the outer wall of the limiting tube. The several annular protrusions 53 are tightly fitted on the inner wall of the receiving cavity, realizing a convenient connection between the end cap 52 and the knob 39.

[0065] In addition, in the above structure, the locking block 40 is provided with a T-shaped fitting groove at one end near the locking sleeve 41, and the screw 42 is provided with a screw head at its corresponding end, which fits into the fitting groove.

[0066] When the screw 42 moves toward the knob 39, the screw 42 drives the locking block 40 to move, thereby achieving axial movement of the locking block 40 and the locking sleeve 41. In some other embodiments, the screw head can be a nut threaded onto the screw 42, i.e., the nut is located inside the locking block 40. However, in this connection method, the locking block 40 is difficult to mold and the cost is too high. In other embodiments, the locking block 40 and the screw 42 can also be integrally formed, i.e., the screw 42 is directly machined onto the locking block 40.

[0067] In this embodiment, by rotating knob 39 to move it closer to connector 37, locking block 40 moves towards connector 37 under the action of screw 42. During this process, locking block 40 drives connecting tube 38 to move synchronously, and connecting tube 38 drives locking sleeve 41 to move synchronously, so that both locking block 40 and locking sleeve 41 move closer to connector 37 until locking sleeve 41 comes into contact with connector 37. At this point, due to friction between locking sleeve 41 and connector 37... The friction prevents the tube from rotating, and since the locking block 40 has not yet come into contact with the locking sleeve 41, it can continue to move toward the connector 37. The knob 39 is rotated until it comes into contact with the connector 37. During this process, the knob 39 and the locking block 40 continue to move toward the connector 37. The first through hole 43 and the second through hole 44 are misaligned, thus confining the connecting tube 38 within the first through hole 43 and the second through hole 44, preventing it from moving within them, thereby achieving the purpose of locking.

[0068] By rotating knob 39, it moves away from connector 37. After a gap is created between knob 39 and connector 37, locking block 40 and locking sleeve 41 can move away from connector 37, creating a gap between locking sleeve 41 and connector 37. This gap allows locking sleeve 41 to rotate relative to connector 37, achieving angle adjustment. Furthermore, the gap allows locking block 40 to move relative to locking sleeve 41, thereby adjusting the position of first through hole 43 and second through hole 44. This prevents connecting tube 38 from being pressed against the inner wall of first through hole 43 and second through hole 44, allowing length adjustment of connecting tube 38. Both angle and length adjustments are achieved by rotating knob 39, allowing angle and length adjustments to be performed simultaneously and locked by the same mechanism, making adjustment more convenient. Moreover, during angle adjustment, the friction between locking sleeve 41 and connector 37 is small, resulting in less wear and making it less prone to failure over long-term use, thus extending its lifespan.

[0069] On the other hand, in this embodiment, such as Figure 16 , 17 As shown, the adjustable connection between the lower end of the outer tube and the tripod 26 specifically refers to the fact that the tripod 26 includes a base 31 and three legs 32. The base 31 has a through mounting hole 33, and the lower end of the outer tube 1 is adjustablely inserted into the mounting hole 33. The three legs 32 are connected to the outer periphery of the base 31 and can be flipped up and down. At least one end of the leg 32 connected to the base 31 is provided with a locking block 34. When the leg 32 with the limiting cam is flipped up and down, the locking block 34 can abut against or disengage from the outer wall of the outer tube 1, realizing the locking and unlocking adjustment of the outer tube 1. The up and down flipping here refers to rotating towards the end of the telescopic tube assembly to open the leg 32 and rotating away from the end of the telescopic tube assembly to close the leg 32.

[0070] Preferably, the locking block 34 is provided with a first cam portion 35 and a second cam portion 36. When rotated upward to open the support leg 32, the first cam portion 35 is pressed against and limited on the outer peripheral wall of the outer tube 1. When rotated downward to retract the support leg 32, the second cam portion 36 is pressed against and limited on the outer peripheral wall of the outer tube 1. When the support leg 32 is in the position between the open and retracted states, both cam portions release the pressing and limiting of the outer peripheral wall of the outer tube 1. At this time, the outer tube 1 can move up and down in the mounting hole 33, that is, the height adjustment of the telescopic tube assembly is realized from another aspect. When all three legs 32 are fully retracted, the second cam 36 abuts against the wall of the outer tube 1, ensuring the tripod 26 and the outer tube 1 are fixed and preventing the loss of parts during transport. In addition, when it is necessary to adjust the height of the outer tube 1 on the base 31, the extension and retraction of the outer tube 1 in the mounting hole 33 can be achieved by rotating one of the legs 32 with the locking block 34. When the desired height is reached, the leg 32 can be rotated upwards to the fully open state, and the locking block 34 can lock and limit the position, which is very convenient.

[0071] In the above structure, the locking and unlocking of the outer tube 1 is achieved by rotating one of the legs 32 of the tripod 26. A unique cam block structure gives the traditional tripod 26 functions other than support, omitting the locking mechanism in the existing bracket that is independent of the operation of the tripod 26 and is a necessary component.

[0072] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A telescopic self-locking microphone stand, characterized in that: The system includes a crossbar assembly (27), a telescopic tube assembly, and a tripod (26) arranged from top to bottom. The telescopic tube assembly includes an outer tube (1) and a telescopic rod (2). The upper end of the telescopic rod (2) is connected to the crossbar assembly (27), and the lower end of the telescopic rod (2) is slidably fitted in the outer tube (1). The lower end of the outer tube (1) is vertically connected to the tripod (26). The lower end of the telescopic rod (2) is provided with several radially movable locking parts (3) and axially slidable actuators (4). A pull rod (5) that is vertically movable along its axial direction passes through the telescopic rod (2). The lower end of the pull rod (5) Connected to the actuator (4), a vertically slidable buckle (6) is provided on the side wall of the upper end of the telescopic rod (2), and the buckle (6) is connected to the upper end of the pull rod (5). When the buckle (6) is moved downward, the pull rod (5) drives the actuator (4) to move downward, so that the locking member (3) moves radially outward and abuts against the inner wall of the outer tube (1) to lock the telescopic rod (2) and the outer tube (1); when the buckle (6) is pulled upward, the pull rod (5) drives the actuator (4) to move upward, so that the locking member (3) retracts radially inward to release the telescopic rod (2) from the outer tube. (1) Locking; A limiting component is also provided between the telescopic rod (2) and the outer tube (1) to prevent relative rotation between the two; The tripod (26) includes a base (31) and three legs (32), the base (31) is provided with a through mounting hole (33), the lower end of the outer tube (1) is inserted into the mounting hole (33) in a height-reducible manner; The three legs (32) are connected to the outer periphery of the base (31) in a flip-up manner, and at least one of the legs (32) is provided with a locking block (34) at the end connected to the base (31), and the legs (32) with the locking block (34) are flip-up and down. When 32), the locking block (34) abuts against or disengages from the outer wall of the outer tube (1); the locking block (34) is provided with a first cam part (35) and a second cam part (36). When each of the legs (32) rotates upward to the open state, the first cam part (35) abuts against and is limited to the outer peripheral wall of the outer tube (1); when each of the legs (32) rotates downward to the retracted state, the second cam part (36) abuts against and is limited to the outer peripheral wall of the outer tube (1); when each of the legs (32) is in a position between the open and retracted states, the outer tube (1) can move up and down in the mounting hole (33).

2. The telescopic self-locking microphone stand according to claim 1, characterized in that: The telescopic rod (2) is a hollow tube structure. The actuator (4) includes a slider and an elastic element. A tapered surface (8) is provided on the outer wall of the slider. Several circumferentially distributed connecting holes (9) are provided on the side wall of the lower end of the telescopic rod (2). Each locking element (3) is movably inserted into each connecting hole (9) in the radial direction, and the radial inner end of each locking element (3) is guided and engaged with the tapered surface (8). A protruding abutting part (10) is provided on the inner wall of the lower end of the telescopic rod (2). The upper end of the elastic element abuts against the abutting part (10), and the lower end abuts against the upper end face of the slider. The elastic element is used to drive the slider to always have a downward tendency, so as to drive the other end of the locking element (3) to always be pressed against the inner wall of the outer tube (1) for limitation.

3. The telescopic self-locking microphone stand according to claim 2, characterized in that: The inner wall of the lower end of the telescopic rod (2) is stamped with several convex edges that are distributed circumferentially and extend radially inward to form the abutment part (10).

4. The telescopic self-locking microphone stand according to claim 1, characterized in that: The pull buckle (6) includes a sliding collar (15) fitted on the outer wall of the telescopic rod (2), and a movable lever (16) is formed on the outer wall of the sliding collar (15). Two waist-shaped through holes (17) extending axially are symmetrically arranged on the side wall of the telescopic rod (2). A fixed pin (18) is provided on the sliding collar (15) radially, and the two ends of the fixed pin (18) are respectively slidably inserted into the two waist-shaped through holes (17). The upper end of the pull rod (5) is connected to the fixed pin (18).

5. The telescopic self-locking microphone stand according to claim 4, characterized in that: A fixed collar (19) is provided on the outer wall of the telescopic rod (2) and above the sliding collar (15), and a fixed lever (20) is formed on the side wall of the fixed collar (19) corresponding to the movable lever (16) vertically.

6. The telescopic self-locking microphone stand according to claim 1, characterized in that: The top of the outer tube (1) is fitted with a positioning sleeve (23), and the telescopic rod (2) is slidably fitted in the positioning sleeve (23); the inner wall of the positioning sleeve (23) is formed with a plurality of positioning buckles (24) distributed circumferentially, and the upper side wall of the outer tube (1) is provided with a plurality of positioning grooves (25) for each positioning buckle (24) to cooperate.

7. The telescopic self-locking microphone stand according to any one of claims 1 to 6, characterized in that: The limiting component includes at least one limiting protrusion (28) protruding outward on the outer wall of the telescopic rod (2), and at least one limiting groove (29) disposed on the inner wall of the outer tube (1) and extending along its axial direction. The limiting protrusion (28) is slidable along the axial direction of the telescopic rod (2) and is not rotatable along its circumference in the corresponding limiting groove (29).

8. The telescopic self-locking microphone stand according to claim 7, characterized in that: The telescopic rod (2) is a hollow tube, and at least one protrusion is stamped from the inside to the outside on the outer peripheral wall of the telescopic rod (2) to form the limiting protrusion (28).

9. The telescopic self-locking microphone stand according to claim 7, characterized in that: The inner wall of the outer tube (1) is formed with two protruding ribs (30), and a limiting groove (29) is formed between the two protruding ribs (30) for sliding engagement of the limiting protrusion (28).

10. The telescopic self-locking microphone stand according to any one of claims 1 to 6, characterized in that: The crossbar assembly (27) includes a connector (37), a connecting tube (38), a knob (39), a locking block (40), and a locking sleeve (41). The locking sleeve (41) and the knob (39) are located on both sides of the connector (37). At least a portion of the locking block (40) is located inside the locking sleeve (41). A screw (42) is connected to the locking block (40), and the screw (42) passes through the locking sleeve (41) and the connector (37) in sequence and is screwed to the knob (39). The locking block (40) is provided with a first through hole (43) for accommodating the connecting tube (38), and the locking sleeve (41) is provided with a second through hole (44) for accommodating the connecting tube (38). The connecting tube (38) is inserted into the first through hole (43) and the second through hole (44), and by rotating the knob (39), the locking block (40) and the locking sleeve (41) have a locked state and an active state, so as to realize the locking and unlocking of the connecting tube (38).

11. The telescopic self-locking microphone stand according to claim 10, characterized in that: A circular first groove (45) is provided on one end face of the locking sleeve (41) near the connector (37). A circular first protrusion (46) is connected to the connector (37). The inner peripheral wall of the first groove (45) and the outer peripheral wall of the first protrusion (46) are both conical surfaces with the same taper. A second groove (47) is provided on one end face of the connector (37) near the locking sleeve (41). The first protrusion (46) is disposed on the bottom surface of the second groove (47). The outer peripheral wall of the locking sleeve (41) near the connector (37) is in contact with the inner peripheral wall of the second groove (47). In the locked state, the inner peripheral wall of the first groove (45) abuts against the outer peripheral wall of the first protrusion (46).

12. The telescopic self-locking microphone stand according to claim 10, characterized in that: The knob (39) has a receiving cavity on the side away from the connector (37), and an adjusting nut is provided on the bottom wall of the receiving cavity. The end of the screw (42) away from the locking block (40) passes through the locking sleeve (41) and the connector (37) in sequence and then cooperates with the adjusting nut.

13. The telescopic self-locking microphone stand according to claim 12, characterized in that: The end of the screw (42) away from the connector (37) extends into the receiving cavity, and an anti-loosening nut is also fitted on the outside of the end of the screw (42) located in the receiving cavity; an end cap (52) is fitted on the open end of the receiving cavity.

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