A telescopic support

Abstract

This utility model discloses a telescopic bracket, including a telescopic outer tube, a telescopic inner tube, a base, a movable adjustment frame, and a drive unit. The bottoms of the telescopic outer tube and the telescopic inner tube are fixed by the base. A rotating component is installed inside the movable adjustment frame and is connected to the drive unit. In the unlocked state, both the telescopic outer tube and the telescopic inner tube can extend and retract freely. In the locked state, the user drives the drive unit to rotate the rotating component, which in turn rotates the topmost inner tube. The bottom of the telescopic inner tube is fixed, so during the rotation of the telescopic inner tube, adjacent inner tube sections increase friction through the eccentric surface of the eccentric component, thus locking them together. To unlock, the drive unit is driven in the opposite direction. Compared with the prior art, this solution is simple to operate and easy to adjust, significantly reducing the user's operating procedures.

Description

Technical Field

[0001] This utility model relates to the field of brackets, and in particular to a telescopic bracket. Background Technology

[0002] Telescopic tripods are a common piece of equipment, especially in the field of photography. However, current telescopic tripods are rather cumbersome to operate, requiring manual adjustment of the distance between adjacent tripod sections and manual locking or unlocking of each pair of sections, which is quite troublesome. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a telescopic bracket that can be operated with one hand and can be quickly locked or unlocked.

[0004] The technical solution adopted by this utility model to solve the problem is: a telescopic bracket, comprising: The telescopic outer tube is formed by connecting several sections of outer tubes together. A first limiting part is provided between two adjacent sections of outer tubes to restrict the two adjacent sections of outer tubes from being able to extend and retract but not rotate. A telescopic inner tube is inserted into the telescopic outer tube. The telescopic inner tube is formed by several inner sub-tubes nested together. An eccentric component with an eccentric surface is provided on two adjacent inner sub-tubes. When two adjacent inner sub-tubes rotate relative to each other, they are locked or unlocked by the eccentric component. In the locked state, the two adjacent inner sub-tubes are relatively fixed. In the unlocked state, the two adjacent inner sub-tubes can extend and retract freely. An anti-rotation part located in the unlocking direction is provided on two adjacent inner sub-tubes to limit the rotation amplitude when the two adjacent inner sub-tubes are unlocked. The base, the bottom of the telescopic outer tube, and the bottom of the telescopic inner tube are all fixed to the base; The movable adjustment frame is provided with a mounting base for installing equipment. The upper end of the telescopic outer tube is fixed to the bottom of the movable adjustment frame. A rotating component is pivotally connected in the horizontal direction in the movable adjustment frame. The rotating component is connected to the inner sub-tube at the top of the telescopic inner tube. A drive unit is arranged on the movable adjustment frame, and the drive unit is connected to the rotating member through a transmission assembly and drives it to rotate.

[0005] As a further improvement to the above technical solution, both the outer and inner circumferences of the inner tube are circular. The eccentric assembly includes at least one eccentric rib vertically disposed on the inner surface of the inner tube and an eccentric seat installed at the end of the inner tube. The surface of the eccentric seat is cut with a stepped groove extending to the upper and lower end faces of the eccentric seat respectively. The number of stepped grooves is the same as the number of eccentric ribs. The stepped groove includes a bottom surface and a side wall whose edges are connected to the surface of the eccentric seat. The side wall of the stepped groove and the edge of the eccentric rib constitute the anti-rotation part. The distance between the bottom surface of the stepped groove and the axis of the eccentric seat gradually increases in the direction away from the side wall, thus forming an eccentric surface. The size of the eccentric seat is larger than the size of the next-stage inner tube and is fixedly installed at the top of the next-stage inner tube. The eccentric seat is inserted into the previous-stage inner tube synchronously with the next-stage inner tube, and the eccentric rib in the previous-stage inner tube is positioned and movable in the stepped groove.

[0006] As a further improvement to the above technical solution, the bottom of the eccentric seat is provided with a lower seat body, and the lower seat body is provided with a vertically arranged limiting slot. The lower seat body is interference-fitted to the top of the next-stage inner tube, and the eccentric rib in the next-stage inner tube is inserted into the limiting slot.

[0007] As a further improvement to the above technical solution, the eccentric ribs are two in number and symmetrically arranged on the inner wall of the inner tube.

[0008] As a further improvement to the above technical solution, the bottom surface of the stepped groove is arc-shaped.

[0009] As a further improvement to the above technical solution, the drive unit is vertically disposed on the side of the movable adjustment frame, and the transmission component includes a first bevel gear vertically disposed in the movable adjustment frame and a second bevel gear disposed on the rotating part and arranged horizontally. The first bevel gear meshes with the second bevel gear, and the drive unit is directly or indirectly connected to the first bevel gear.

[0010] As a further improvement to the above technical solution, the transmission assembly further includes a driven spur gear pivotally connected in the vertical direction within the movable adjustment frame. The driven spur gear is coaxially connected to the first bevel gear. A gear set meshes on the driven spur gear, and the gear set includes at least one stage of transmission gear. The drive unit is connected to the first stage of transmission gear.

[0011] As a further improvement to the above technical solution, the driving unit is a driving button arranged vertically on the side of the movable adjustment frame. The driving button is connected to the shaft of the first-stage transmission gear through a connecting rod. When the driving button swings up and down, it drives the first-stage transmission gear to rotate.

[0012] As a further improvement to the above technical solution, the surface of the drive button is provided with a first drive surface and a second drive surface along the height direction. The angle between the first drive surface and the second drive surface is an obtuse angle. When the drive button swings to the extreme position, the first drive surface or the second drive surface on the side corresponding to the extreme position is parallel to the axis of the movable adjustment frame, and the second drive surface or the first drive surface facing the other extreme position is raised.

[0013] As a further improvement to the above technical solution, the surfaces of the first driving surface and the second driving surface are provided with anti-slip textures.

[0014] The beneficial effects of this utility model are as follows: In the unlocked state, both the telescopic outer tube and the telescopic inner tube can freely extend and retract. The user holds the movable adjustment frame with one hand, and with the base supported on the ground, the overall height is adjusted manually by holding the movable adjustment frame. When the desired height is reached, the user drives the drive unit to rotate the rotating component, which in turn rotates the top inner tube. The telescopic outer tube is fixed to the bottom of the telescopic inner tube by the base. During this process, the telescopic inner tube rotates. As the two adjacent inner tube sections rotate, the eccentric surface of the eccentric component increases the friction, thereby locking the two adjacent inner tube sections to complete the locking function. When unlocking is required, the drive unit is driven in the opposite direction, causing the telescopic inner tube to rotate in the opposite direction, which in turn resets the two adjacent inner tube sections, thus completing the unlocking. Compared with the prior art, this solution is simple to operate and easy to adjust, significantly reducing the user's operating procedures. Attached Figure Description

[0015] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the preferred embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction; Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction; Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure in the CC direction; Figure 5 This is one of the exploded structural diagrams of a preferred embodiment of the present invention; Figure 6 This is the second schematic diagram of the exploded structure of the preferred embodiment of this utility model; Figure 7 This is a schematic diagram of the internal structure of the movable adjustment frame; Figure 8 This is a schematic diagram of the eccentric seat. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0019] In the description of this utility model, "several" means one or more, "multiple" 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. If "first" or "second" is used in the description, it is only for the purpose of 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.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Reference Figures 1 to 8 A telescopic support, characterized in that it comprises: The telescopic outer tube 10 is formed by several sections of outer tubes 11 nested together. A first limiting part is provided between two adjacent sections of outer tubes 11 to restrict the two adjacent sections of outer tubes 11 from only extending and not rotating. The telescopic inner tube 20 is inserted into the telescopic outer tube 10. The telescopic inner tube 20 is formed by several inner sub-tubes 21 connected to each other. An eccentric component with an eccentric surface is provided on two adjacent inner sub-tubes 21. When the two adjacent inner sub-tubes 21 rotate relative to each other, they are locked or unlocked by the eccentric component. In the locked state, the two adjacent inner sub-tubes 21 are relatively fixed. In the unlocked state, the two adjacent inner sub-tubes 21 can extend and retract freely. An anti-rotation part located in the unlocking direction is provided on the two adjacent inner sub-tubes 21 to limit the rotation amplitude when the two adjacent inner sub-tubes 21 are unlocked. The base 30, the telescopic outer tube 10 and the telescopic inner tube 20 are all fixed to the base 30 at their bottoms; The movable adjustment frame 40 is provided with a mounting base for installing equipment. The upper end of the telescopic outer tube 10 is fixed to the bottom of the movable adjustment frame 40. A rotating component 43 is pivotally connected in the horizontal direction in the movable adjustment frame 40. The rotating component 43 is connected to the inner sub-tube 21 at the top of the telescopic inner tube 20. A drive unit is arranged on the movable adjustment frame 40. The drive unit is connected to the rotating member 43 through a transmission assembly and drives it to rotate.

[0022] In the unlocked state, both the telescopic outer tube 10 and the telescopic inner tube 20 can be freely extended and retracted. The user holds the movable adjustment frame 40 with one hand, and with the base 30 supported on the ground, the overall height is adjusted by manually holding the movable adjustment frame 40. When the desired height is reached, the user drives the drive unit to move, thereby rotating the rotating component 43 and causing the topmost inner tube 21 to rotate. The telescopic outer tube 10 is fixed to the bottom of the telescopic inner tube 20 by the base 30. Thus, during this process, because the base 30 is supported by the ground and the movable adjustment frame 40 is held, the telescopic outer tube 10... Since rotation is not allowed, the rotation of the rotating component 43 will cause the telescopic inner tube 20 to rotate. During the rotation, the adjacent inner tubes 21 rotate, increasing the friction through the eccentric surface of the eccentric component, thereby locking the adjacent inner tubes 21 to complete the locking effect. Because the force transmission is uniform, there will be no situation where two inner tubes 21 rotate significantly, generating excessive friction and locking, while two inner tubes 21 do not rotate at all and can still move freely. The friction between each pair of inner tubes 21 will be around an average value. Moreover, the eccentric component has a locking threshold during rotation, that is, two adjacent inner tubes 21 rotate a certain angle to enter the locking state. Therefore, as long as the rotation amplitude of the rotating component 43 driven by the drive unit is greater than the rotation amplitude of the locking threshold of all inner tubes 21, it can be ensured that each inner tube 21 is locked to each other. When unlocking is required, the drive unit is driven in the opposite direction, thereby causing the telescopic inner tube 20 to rotate in the opposite direction, which in turn causes the adjacent inner tubes 21 to reset and complete the unlocking. Because anti-rotation parts located in the unlocking direction are provided on the two adjacent inner tube sections 21 to limit the rotation amplitude of the two adjacent inner tube sections 21 when unlocking, the maximum angle that the two adjacent inner tube sections 21 can rotate when resetting is equal to the rotation angle when locking, thus ensuring the accuracy of resetting. Compared with the prior art, this solution is simple to operate and easy to adjust, which can greatly reduce the user's operation process.

[0023] In this solution, the eccentric component can be directly mounted on the inner tube 21. For example, the eccentric component includes an eccentric hole on the inner circumference of the preceding inner tube 21 and an eccentric tube wall on the outer circumference of the following inner tube 21. The eccentric tube wall on the outer circumference of the following inner tube 21 is inserted into the eccentric hole of the preceding inner tube 21. When the eccentric tube wall rotates relative to the eccentric hole, it completes the locking or unlocking operation. The anti-rotation part is two protrusions on the outer circumference of the following inner tube 21 and the inner wall of the preceding inner tube 21 that can abut against each other. However, in this method, the shape of the inner tube 21 is more complex, which makes its production more troublesome.

[0024] Preferably, both the outer and inner circumferences of the inner tube 21 are circular. The eccentric assembly includes at least one eccentric rib 211 vertically disposed on the inner surface of the inner tube 21 and an eccentric seat 60 installed at the end of the inner tube 21. The surface of the eccentric seat 60 is cut with a stepped groove 601 extending to the upper and lower end faces of the eccentric seat 60, respectively. The number of stepped grooves 601 is the same as the number of eccentric ribs 211. The stepped groove 601 includes a bottom surface 6011 and a side wall 6012, both of which are connected to the surface of the eccentric seat 60. The sidewall 6012 and the edge of the eccentric rib 211 of section 01 constitute the anti-rotation part. The distance between the bottom surface 6011 of the stepped groove 601 and the axis of the eccentric seat 60 gradually increases away from the sidewall 6012, thus forming an eccentric surface. The size of the eccentric seat 60 is larger than that of the subsequent inner tube 21 and is fixedly installed at the top of the subsequent inner tube 21. The eccentric seat 60 is inserted into the preceding inner tube 21 synchronously with the subsequent inner tube 21, and the eccentric rib 211 in the preceding inner tube 21 moves within the stepped groove 601. In this scheme, when two adjacent inner tubes 21 rotate relative to each other and lock, the eccentric rib 211 moves along the eccentric surface formed by the bottom surface 6011 of the stepped groove 601, thereby gradually increasing the friction between the eccentric rib 211 and the bottom surface 6011 of the stepped groove 601, thus gradually locking the tube. When two adjacent inner tubes 21 rotate relative to each other and thus unlock, the eccentric rib 211 returns to its original position along the bottom surface 6011 of the stepped groove 601 until it abuts against the side wall 6012 of the stepped groove 601, thereby stopping the rotation.

[0025] Furthermore, in the above structure, the eccentric rib 211 also acts as a reinforcing rib to further enhance the strength of the inner tube 21.

[0026] The bottom of the eccentric seat 60 can be fixed to the end of the inner tube 21 by bolts or other means. For ease of installation, it is preferable that the bottom of the eccentric seat 60 is provided with a lower seat body 61. The lower seat body 61 is provided with a vertically arranged limiting slot 611. The lower seat body 61 is interference-fitted to the top of the next-stage inner tube 21, and the eccentric rib 211 in the next-stage inner tube 21 is inserted into the limiting slot 611.

[0027] In this design, considering the symmetry of the forces, it is preferable that the eccentric ribs 211 are two in number and symmetrically arranged on the inner wall of the inner tube 21.

[0028] In this design, the bottom surface 6011 of the stepped groove 601 can be a plane. Considering the smoothness of the eccentric rib 211 when moving on the bottom surface 6011 of the stepped groove 601, it is preferable that the bottom surface 6011 of the stepped groove 601 is an arc-shaped surface. However, the processing of a complete arc-shaped surface is relatively complex, and multiple inclined surfaces can also be connected to form a quasi-arc-shaped surface.

[0029] In this design, the drive unit is preferably vertically disposed on the side of the movable adjustment frame 40. The transmission assembly includes a first bevel gear 41 vertically disposed within the movable adjustment frame 40 and a second bevel gear 42 disposed on the rotating member 43 and arranged horizontally. The first bevel gear 41 meshes with the second bevel gear 42. The drive unit is directly or indirectly connected to the first bevel gear 41. This allows the drive unit to be conveniently disposed on the side of the movable adjustment frame 40, and the up-and-down movement of the drive unit on the side of the movable adjustment frame 40 is converted into the horizontal rotation of the second bevel gear 42.

[0030] Considering that if the drive unit directly drives the first bevel gear 41, the required adjustment range of the drive unit would be large, the transmission assembly also includes a driven spur gear 44 pivotally connected in the vertical direction within the movable adjustment frame 40. The driven spur gear 44 is coaxially connected to the first bevel gear 41, and a gear set meshes on the driven spur gear 44. The gear set includes at least one stage of transmission gear 45. The drive unit is connected to the first stage of transmission gear 45, and a speed change mechanism is formed by the meshing of the transmission gear 45 and the driven spur gear 44. Then, the first bevel gear 41 meshes with the second bevel gear 42. This reduces the adjustment range of the drive unit, so that the drive unit only needs to drive the first stage of transmission gear 45 to rotate a small angle to drive the second bevel gear 42 to rotate a large angle.

[0031] Further optimization is preferred, where the driving unit is a driving button 50 vertically arranged on the side of the movable adjustment frame 40. The driving button 50 is connected to the shaft of the first-stage transmission gear 45 via a connecting rod. When the driving button 50 swings up and down, it drives the first-stage transmission gear 45 to rotate. In other embodiments, the driving unit can also be a handwheel engaged with the first-stage transmission gear 45.

[0032] In other embodiments, the drive unit may also be a horizontally rotating turntable arranged on the movable adjustment frame 40, with a first flat gear connected to the turntable, and a second flat gear meshing with the first flat gear on the rotating member 43.

[0033] The drive unit can also be a push switch and a motor that works with the push switch. The push switch is equipped with a button to control the forward and reverse rotation of the motor. The motor is connected to the rotating component 43. The push switch is used to start and control the rotation direction of the motor to drive the rotating component 43 to rotate.

[0034] In this design, to facilitate operation of the drive button 50, the surface of the drive button 50 is preferably provided with a first drive surface 51 and a second drive surface 52 along the height direction. The angle between the first drive surface 51 and the second drive surface 52 is an obtuse angle. When the drive button 50 swings to its limit position, the first drive surface 51 or the second drive surface 52 on the side corresponding to the limit position is parallel to the axis of the movable adjustment bracket 40, and the second drive surface 52 or the first drive surface 51 facing the other limit position is raised. Thus, whether unlocking or locking, the corresponding first drive surface 51 and the second drive surface 52 are in a raised state, making it easy for the user's finger to push. Preferably, the surfaces of the first drive surface 51 and the second drive surface 52 are provided with anti-slip textures 53.

[0035] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A telescopic support, characterized in that, include: Telescopic outer tube (10), the telescopic outer tube (10) is formed by several sections of outer sub-tubes (11) nested together, and a first limiting part is provided between two adjacent sections of outer sub-tubes (11) to restrict the two adjacent sections of outer sub-tubes (11) to only telescopic and not rotate. Telescopic inner tube (20) is inserted into the telescopic outer tube (10). The telescopic inner tube (20) is formed by several inner sub-tubes (21) connected to each other. An eccentric component with an eccentric surface is provided on two adjacent inner sub-tubes (21). When the two adjacent inner sub-tubes (21) rotate relative to each other, they are locked or unlocked by the eccentric component. In the locked state, the two adjacent inner sub-tubes (21) are relatively fixed. In the unlocked state, the two adjacent inner sub-tubes (21) can freely extend and retract. An anti-rotation part located in the unlocking direction is provided on the two adjacent inner sub-tubes (21) to limit the rotation amplitude when the two adjacent inner sub-tubes (21) are unlocked. The bottom of the base (30), the telescopic outer tube (10) and the telescopic inner tube (20) are all fixed to the base (30); The movable adjustment frame (40) is provided with a mounting base for installing equipment. The upper end of the telescopic outer tube (10) is fixed to the bottom of the movable adjustment frame (40). A rotating part (43) is pivotally connected in the horizontal direction in the movable adjustment frame (40). The rotating part (43) is connected to the inner sub-tube (21) at the top of the telescopic inner tube (20). The drive unit is arranged on the movable adjustment frame (40) and is connected to the rotating member (43) through a transmission assembly and drives it to rotate.

2. A telescopic bracket as described in claim 1, characterized in that: The inner tube (21) has a circular outer and inner circumference. The eccentric assembly includes at least one eccentric rib (211) vertically disposed on the inner surface of the inner tube (21) and an eccentric seat (60) installed at the end of the inner tube (21). The surface of the eccentric seat (60) is cut with a stepped groove (601) extending to the upper and lower end faces of the eccentric seat (60) respectively. The number of stepped grooves (601) is the same as the number of eccentric ribs (211). The stepped groove (601) includes a bottom surface (6011) and a side wall (6012) whose edges are connected to the surface of the eccentric seat (60). The sidewall (6012) and the edge of the eccentric rib (211) constitute the anti-rotation part. The distance between the bottom surface (6011) of the stepped groove (601) and the axis of the eccentric seat (60) gradually increases in the direction away from the sidewall (6012) and thus forms an eccentric surface. The size of the eccentric seat (60) is larger than that of the next-level inner tube (21) and is fixedly installed at the top of the next-level inner tube (21). The eccentric seat (60) is inserted into the previous-level inner tube (21) synchronously with the next-level inner tube (21) and makes the eccentric rib (211) in the previous-level inner tube (21) move in the stepped groove (601).

3. A telescopic support as described in claim 2, characterized in that: The bottom of the eccentric seat (60) is provided with a lower seat body (61), and the lower seat body (61) is provided with a vertically arranged limiting slot (611). The lower seat body (61) is interference-fitted to the top of the next-level inner tube (21), and the eccentric rib (211) in the next-level inner tube (21) is inserted into the limiting slot (611).

4. A telescopic bracket as described in claim 2, characterized in that: The eccentric ribs (211) are two in number and symmetrically arranged on the inner wall of the inner tube (21).

5. A telescopic bracket as described in claim 2, characterized in that: The bottom surface (6011) of the stepped groove (601) is arc-shaped.

6. A telescopic bracket as described in claim 1, characterized in that: The drive unit is vertically disposed on the side of the movable adjustment frame (40). The transmission assembly includes a first bevel gear (41) vertically disposed in the movable adjustment frame (40) and a second bevel gear (42) disposed on the rotating part (43) and arranged horizontally. The first bevel gear (41) meshes with the second bevel gear (42). The drive unit is directly or indirectly connected to the first bevel gear (41).

7. A telescopic bracket as described in claim 6, characterized in that: The transmission assembly also includes a driven spur gear (44) pivotally connected in the vertical direction within the movable adjustment frame (40). The driven spur gear (44) is coaxially connected to the first bevel gear (41). A gear set meshes on the driven spur gear (44), and the gear set includes at least one stage of transmission gear (45). The drive unit is connected to the first stage of transmission gear (45).

8. A telescopic bracket as described in claim 7, characterized in that: The driving unit is a driving button (50) arranged vertically on the side of the movable adjustment frame (40). The driving button (50) is connected to the shaft of the first-stage transmission gear (45) through a connecting rod. When the driving button (50) swings up and down, it drives the first-stage transmission gear (45) to rotate.

9. A telescopic bracket as described in claim 8, characterized in that: The surface of the drive button (50) is provided with a first drive surface (51) and a second drive surface (52) along the height direction. The angle between the first drive surface (51) and the second drive surface (52) is an obtuse angle. When the drive button (50) swings to the limit position, the first drive surface (51) or the second drive surface (52) on the side corresponding to the limit position is parallel to the axis of the movable adjustment frame (40), and the second drive surface (52) or the first drive surface (51) facing the other limit position is raised.

10. A telescopic bracket as described in claim 9, characterized in that: The first driving surface (51) and the second driving surface (52) are provided with anti-slip texture (53).

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