Telescopic tube locking mechanism and telescopic leg tube

Abstract

The utility model discloses a telescopic pipe locking mechanism, include: connecting rod, along the axial length direction of telescopic pipe extension, first lock unit, second lock unit, be located respectively in the both ends of connecting rod, drive unit, respectively with first lock unit, connecting rod transmission cooperation, in the drive unit exert external force, can drive first lock unit to the direction of moving close to or away from telescopic pipe wall surface, through connecting rod trigger the part of second lock unit to the direction of moving close to or away from telescopic pipe wall surface simultaneously. The utility model discloses still a kind of telescopic foot pipe. The utility model utilizes the operation of one step on drive unit can realize the locking or unlocking between inner tube one, inner tube two, outer tube, easy operation;One telescopic pipe locking mechanism can realize the locking or unlocking between inner tube one, inner tube two, outer tube, reduce the quantity of locking structure;Utilize the rotation of drive unit can trigger first lock unit and second lock unit simultaneously, and structure design is ingenious.

Description

Technical Field

[0001] This utility model belongs to the technical field of photographic auxiliary equipment, and in particular relates to a telescopic tube locking mechanism and a telescopic leg tube. Background Technology

[0002] Existing leg locking structures are all set between two adjacent legs. When the three legs are connected in telescopic manner, at least two locking structures are required to lock all the legs after they are extended. For example, the tripod for multi-angle shooting disclosed in Chinese patent CN223019901U has multiple tube section locking buckles to lock all telescopic legs, which is relatively complex. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, this utility model provides a telescopic tube locking mechanism and telescopic foot tube, which can lock three telescopic tubes in one step. It is easy to operate and the locking is effective.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a telescopic tube locking mechanism, comprising:

[0005] The connecting rod extends along the axial length of the telescopic tube;

[0006] The first locking unit and the second locking unit are respectively located at both ends of the connecting rod;

[0007] The drive unit is respectively engaged with the first locking unit and the linkage transmission;

[0008] When an external force is applied to the drive unit, the first locking unit can be driven to move toward or away from the wall of the telescopic tube, while the connecting rod triggers a portion of the second locking unit to move toward or away from the wall of the telescopic tube.

[0009] Furthermore, the drive unit includes a handle, a first drive surface and a second drive surface disposed on the handle, and a rolling element abutting against the second drive surface, the rolling element abutting against the connecting rod; the first locking unit includes a pressure element abutting against the first drive surface.

[0010] Furthermore, when an external force is applied to the handle, the first drive surface has a component of movement along a first direction, and the second drive surface has a component of movement along a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0011] Furthermore, the first driving surface has at least a first concave surface and a first convex surface, and the pressure-applying member has a second concave surface and a second convex surface. When an external force is applied to rotate the handle, the first convex surface can be rotated to engage with the second convex surface or with the second concave surface.

[0012] Furthermore, the second driving surface is an arc-shaped notch, and the distance between the bottom surface of the arc-shaped notch and the rotation center of the handle changes, so that the volume of the arc-shaped notch accommodating the rolling element changes.

[0013] Furthermore, the handle has a rotating column, the first driving surface and the second driving surface are disposed on the rotating column, and the pressure-applying member is coaxially connected with the rotating column.

[0014] Furthermore, the second locking unit includes a mating part connected to the connecting rod, a movable part abutting against the mating part, a reset part abutting against the mating part, and a limiting cavity. The mating part and the movable part are located in the limiting cavity. The axial movement of the connecting rod can drive the mating part to compress the reset part, so that the movable part can be translated towards or away from the wall of the telescopic tube.

[0015] Furthermore, the mating part and the movable part are mated together by inclined surfaces, and the end of the telescopic tube has a joint, which has a positioning part for restricting the translation of the movable part and a window part for the movable part to extend out.

[0016] This utility model also discloses a telescopic tube, including: an outer tube, an inner tube one and an inner tube two that are telescopically connected to the outer tube, and a telescopic tube locking mechanism as described above. When an external force is applied to the driving unit, the first locking unit can be driven to move towards or away from the wall of the telescopic tube. At the same time, a part of the second locking unit is triggered by the connecting rod to move towards or away from the wall of the telescopic tube, so as to lock or unlock the outer tube, the inner tube one and the inner tube two.

[0017] Furthermore, the outer tube has a first joint and a second joint, with the first locking unit located at the first joint and the second locking unit located at the second joint; the first locking unit moves toward or away from the wall of the inner tube to lock or unlock the inner tube, and a portion of the second locking unit moves toward or away from the wall of the inner tube to lock or unlock the inner tube; the outer tube, inner tube one, and inner tube two are irregularly shaped tubes with a transverse width greater than a longitudinal width, and the telescopic tube locking mechanism is located on one side of the transverse width; the pressure-applying member has a first contact surface that can fit against the outer wall of the inner tube one, and the movable member has a second contact surface that can fit against the outer wall of the inner tube two.

[0018] The beneficial effects of this utility model are: 1) Locking or unlocking between inner tube one, inner tube two, and outer tube can be achieved through a one-step operation on the drive unit, which is simple to operate; 2) One telescopic tube locking mechanism can achieve locking or unlocking between inner tube one, inner tube two, and outer tube, reducing the number of locking structures; 3) The rotation of the drive unit can simultaneously trigger the first locking unit and the second locking unit, which is ingenious in structural design; 4) A rolling element is designed between the second drive surface and the connecting rod. Under the interaction of the connecting rod connected to the reset element and the second drive surface, it will only roll and will not deviate from the second drive surface. The structure is ingenious and will not bring resistance to the rotation of the handle; 5) The first drive surface and the pressure element cooperate through concave and convex surfaces. During the rotation of the handle, the locking of the telescopic tube is gradually achieved. The locking is effective, and the locking operation is smooth and effortless. Attached Figure Description

[0019] Figure 1 The three-dimensional telescopic leg tube in this utility model Figure 1 .

[0020] Figure 2 This is an exploded structural diagram of the telescopic leg tube in this utility model.

[0021] Figure 3 for Figure 2 Enlarged view of the structure at point A in the image.

[0022] Figure 4 for Figure 2 Enlarged view of the structure at point B in the image.

[0023] Figure 5 This is a longitudinal sectional view of the telescopic leg tube in this utility model.

[0024] Figure 6 for Figure 5 Enlarged view of the structure at point C.

[0025] Figure 7 This is a perspective view of the handle in this utility model.

[0026] Figure 8 This is a partial structural diagram of the cooperation between the drive unit and the first locking unit in this utility model.

[0027] Figure 9 The three-dimensional pressure-applying component in this utility model Figure 1 .

[0028] Figure 10 The three-dimensional pressure-applying component in this utility model Figure 2 .

[0029] Figure 11 This is a side view of the pressure-applying component in this utility model.

[0030] Figure 12 This is a cross-sectional view of the telescopic leg tube in this utility model. Figure 1 .

[0031] Figure 13 This is a cross-sectional view of the telescopic leg tube in this utility model. Figure 2 .

[0032] Figure 14 This is a schematic diagram of the structure of the drive unit and connecting rod in this utility model. Figure 1 .

[0033] Figure 15 for Figure 14 Enlarged view of the structure at point D in the image.

[0034] Figure 16 This is a schematic diagram of the structure of the drive unit and connecting rod in this utility model. Figure 2 .

[0035] Figure 17 for Figure 16 Enlarged view of the structure at point E in the image.

[0036] Figure 18 The three-dimensional telescopic leg tube in this utility model Figure 2 It is currently in an unlocked state.

[0037] Figure 19 This is a schematic diagram of the structure of the drive unit and connecting rod in this utility model. Figure 3 It is currently in an unlocked state.

[0038] Figure 20 for Figure 19 Enlarged view of the structure at point F in the image.

[0039] Figure 21 This is a schematic diagram of the structure of the drive unit and connecting rod in this utility model. Figure 4 It is currently in an unlocked state.

[0040] Figure 22 for Figure 21 Enlarged view of the structure at point G in the image.

[0041] Figure 23 This is a schematic diagram of the application of the telescopic leg tube in this utility model to a tripod.

[0042] Among them, 1-first locking unit, 11-pressure applying member, 111-second concave surface, 112-second convex surface, 113-first abutting surface, 114-protruding post, 2-second locking unit, 21-fitting member, 211-first inclined surface, 22-moving member, 221-second abutting surface, 222-second inclined surface, 223-protrusion, 23-resetting member, 24-limiting cavity, 3-connecting rod, 4-drive unit, 41-first drive surface, 411-first concave surface, 412-first convex surface, 42-second drive surface, 43-handle, 431-rotating post, 44-rolling member, 5-outer tube, 51-first joint, 52-second joint, 521-positioning part, 522-window part, 61-inner tube one, 62-inner tube two. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort should fall within the scope of protection of the present invention.

[0044] like Figures 1-5 As shown, a telescopic tube locking mechanism includes a connecting rod 3 extending along the axial length direction of the telescopic tube, a first locking unit 1 and a second locking unit 2 respectively disposed at both ends of the connecting rod 3, and a drive unit 4 that is in transmission cooperation with the first locking unit 1 and the connecting rod 3 respectively.

[0045] When an external force is applied to the drive unit 4, the first locking unit 1 can be driven to move toward or away from the wall of the telescopic tube. At the same time, the second locking unit 2 is triggered by the connecting rod 3 to move toward or away from the wall of the telescopic tube.

[0046] When the above-mentioned telescopic tube locking mechanism is installed on the telescopic foot tube, a telescopic foot tube includes an outer tube 5, an inner tube 1 61 and an inner tube 2 62 that are telescopically connected to the outer tube 5, and the above-mentioned telescopic tube locking mechanism. Part of the telescopic tube locking mechanism is located inside the outer tube 5. Specifically, part of the drive unit 4 is located outside the outer tube 5, the connecting rod 3 is located inside the outer tube 5, part of the drive unit 4 and the first locking unit 1 are located between the outer tube 5 and the inner tube 1 61, and the second locking unit 2 is located between the outer tube 5 and the inner tube 2 62.

[0047] When an external force is applied to the drive unit 4, the first locking unit 1 can be driven to move closer to or further away from the wall of the telescopic tube. At the same time, the second locking unit 2 is triggered by the connecting rod 3 to move closer to or further away from the wall of the telescopic tube, thereby realizing the locking or unlocking of the outer tube 5, the inner tube 1 61 and the inner tube 2 62.

[0048] Specifically, the first locking unit 1 moves towards or away from the wall of the inner tube 61, thereby locking or unlocking the inner tube 61; a portion of the second locking unit 2 moves towards or away from the wall of the inner tube 62, thereby locking or unlocking the inner tube 62. It should be noted that the movement of the first locking unit 1 towards or away from the wall of the inner tube 61 can also be interpreted as the first locking unit 1 moving towards or away from the inner wall of the outer tube 5. Therefore, the terms "nearer" and "away" do not necessarily correspond precisely to locking or unlocking; they are merely used to illustrate that the actions of approaching or moving away can achieve the functions of locking and unlocking.

[0049] like Figure 3 , Figure 5 , Figures 7-12 , Figures 14-22 As shown, the drive unit 4 includes a handle 43, a first drive surface 41 and a second drive surface 42 disposed on the handle 43, and a rolling element 44 abutting against the second drive surface 42. The rolling element 44 abuts against the top end of the connecting rod 3.

[0050] When an external force is applied to the handle 43, that is, when the handle 43 is rotated by an external force, the first driving surface 41 has a component of movement along a first direction, and the second driving surface 42 has a component of movement along a second direction, wherein the first and second directions are perpendicular to each other. Specifically, with Figure 5 Taking the direction shown as an example, when the handle 43 is rotated, the first driving surface 41 has a lateral movement component, which can push the first locking unit 1 to move laterally. The second driving surface 42 has a vertical movement component, which can push the connecting rod 3 to move vertically, thereby triggering the second locking unit 2 to lock or unlock.

[0051] In this embodiment, as Figure 7 , Figure 20 As shown, the first driving surface 41 has at least a first concave surface 411 and a first convex surface 412. Here, the first concave surface 411 and the first convex surface 412 do not have a clear dividing line; they are relative concepts. In this embodiment, there is a transition surface between the first concave surface 411 and the first convex surface 412, making the entire wall transition smoother. There is no clear dividing line between the first concave surface 411 and the transition surface, nor between the transition surface and the first convex surface 412. There is a clear dividing line between the first concave surface 411 and the first convex surface 412 because the height of the first convex surface 412 is much greater than that of the first concave surface 411.

[0052] like Figure 10 As shown, the first locking unit 1 includes a pressure member 11 that abuts against the first driving surface 41. The pressure member 11 has a second concave surface 111 and a second convex surface 112. Here, the second concave surface 111 and the second convex surface 112 do not have a clear dividing line. They are relative concepts. There is a transition surface between the second concave surface 111 and the second convex surface 112, which makes the transition of the entire wall surface smoother.

[0053] When an external force is applied to rotate the handle 43, the first convex surface 412 can rotate to engage with the second convex surface 112, that is, the first convex surface 412 and the second convex surface 112 abut against each other, thereby pushing the pressure member 11 toward the inner tube 61 and locking the inner tube 61; of course, the first convex surface 412 can also rotate to engage with the second concave surface 111, that is, the first convex surface 412 and the second concave surface 111 abut against each other, thereby not applying external force to the pressure member 11 toward the inner tube 61 and unlocking the inner tube 61.

[0054] like Figures 16-20 As shown, the second driving surface 42 is an arc-shaped notch. The distance between the bottom surface of this arc-shaped notch and the rotation center of the handle 43 changes, thereby changing the volume of the arc-shaped notch that accommodates the rolling element 44. Specifically, defined... Figure 17 Point O is the rotation center of handle 43. The depth of the arc-shaped notch decreases from top to bottom. When the arc-shaped notch with a larger depth abuts against the rolling element 44, the volume of the rolling element 44 within the arc-shaped notch is larger. At this time, the driving unit 4 presses down the connecting rod 3 with a smaller amplitude. When the arc-shaped notch with a smaller depth abuts against the rolling element 44, the volume of the rolling element 44 within the arc-shaped notch is smaller. At this time, the driving unit 4 presses down the connecting rod 3 with a larger amplitude, which can trigger the second locking unit 2.

[0055] In this embodiment, the rolling element 44 is a ball bearing. Under the interaction of the connecting rod 3 and the arc-shaped notch, it will only roll and will not deviate from the arc-shaped notch. The structure is ingeniously designed, the materials are simple, and it will not cause resistance to the rotation of the handle 43.

[0056] like Figure 14 As shown, in this embodiment, the handle 43 is U-shaped, with rotating columns 431 facing each other at its open ends. One of the rotating columns 431 is provided with the aforementioned first driving surface 41 and second driving surface 42. Specifically, the first driving surface 41 is provided on the end face of the rotating column 431, and the second driving surface 42 is provided on the outer wall surface of the rotating column 431. The pressure applying member 11 is coaxially connected with the rotating column 431. Specifically, a protrusion 114 is formed at the center of the pressure applying member 11. The protrusion 114 is inserted into the center of the rotating column 431 to achieve a concentric and coaxial connection between the two, avoiding radial offset.

[0057] like Figure 6 , Figure 14 , Figure 16 , Figure 19 As shown, the second locking unit 2 includes a mating part 21 connected to the connecting rod 3, a movable part 22 abutting against the mating part 21, a reset part 23 abutting against the mating part 21, and a limiting cavity 24. The mating part 21 and the movable part 22 are both located in the limiting cavity 24, thereby limiting their range of motion.

[0058] When the drive unit 4 drives the connecting rod 3 to move axially downward, it can drive the mating part 21 to compress the reset part 23, thereby causing the movable part 22 to translate towards or away from the wall of the telescopic tube. Specifically, the movable part 22 translates towards or away from the inner tube 62, thereby locking the inner tube 62.

[0059] The mating part 21 and the movable part 22 are mated by the abutting of inclined surfaces. Specifically, a first inclined surface 211 is provided on the side of the mating part 21 facing the movable part 22, and a second inclined surface 222 is provided on the side of the movable part 22 facing the mating part 21. Through the abutting of the first inclined surface 211 and the second inclined surface 222, the movable part 22 can move left and right during the up and down movement of the mating part 21.

[0060] The telescopic tube end has a joint, which has a positioning part 521 for restricting the translation of the movable part 22, and a window part 522 for the movable part 22 to extend out. Specifically, the outer tube 5 has a first joint 51 and a second joint 52. A first locking unit 1 is disposed in the first joint 51, and a second locking unit 2 is disposed in the second joint 52. That is, the second joint 52 is provided with the aforementioned positioning part 521 and window part 522, and the aforementioned limiting cavity 24 is formed by the second joint 52. The positioning part 521 is located on the inner sidewall of the limiting cavity 24, and the window part 522 is located at the end of the limiting cavity 24. In this embodiment, the positioning part 521 is a groove structure, and correspondingly, as shown... Figure 4 As shown, a protrusion 223 is provided on the side of the movable part 22, into which the positioning part 521 can be inserted. The movable part 22 is translated relative to the second joint 52 by the protrusion 223 translating within the groove.

[0061] In this embodiment, the outer tube 5, inner tube 1 61, and inner tube 2 62 are irregularly shaped tubes, specifically, their lateral width is greater than their longitudinal width, and the telescopic tube locking mechanism is located on one side of the lateral width. In order to increase the contact area between the first locking unit 1 and the inner tube 1 61, thereby achieving effective locking of the inner tube 1 61, the pressure member 11 has a first abutting surface 113 that can fit against the outer wall of the inner tube 1 61; in order to increase the contact area between the second locking unit 2 and the inner tube 2 62, thereby achieving effective locking of the inner tube 2 62, the movable member 22 has a second abutting surface 221 that can fit against the outer wall of the inner tube 2 62.

[0062] The usage process of this utility model is as follows: when in the presence of Figure 18 In the unlocked state shown, inner tube 1 61 and inner tube 2 62 are unlocked and can freely extend from the outer tube 5, achieving the extension of the telescopic foot tube; applying external force to rotate the handle 43 downwards causes the rotating column 431 to rotate, causing the first convex surface 412 of the first driving surface 41 to abut against the second convex surface 112 of the pressure member 11, thereby pushing the pressure member 11 to translate closer to the inner tube 1 61, and the first abutting surface 113 abuts against the outer wall surface of the inner tube 1 61, thereby locking the inner tube 1 61. Figure 12 As shown; simultaneously, since the second driving surface 42 also moves with the rotating column 431, while the relative position of the rolling element 44 remains unchanged, the engagement state of the rolling element 44 and the second driving surface 42 changes from... Figure 22 Switch to Figure 17 The connecting rod 3 is pressed down by the rolling element 44, and then... Figure 6 As shown, the mating part 21, which was originally abutting against the top surface of the limiting cavity 24 under the action of the reset part 23, is pushed downward by the connecting rod 3. The first inclined surface 211 and the second inclined surface 222 cooperate, pushing the movable part 22 to move to the right. After extending out of the window part 522, its second abutting surface 221 abuts against the outer wall surface of the inner tube 62, thereby locking the inner tube 62. Figure 13 As shown.

[0063] When the handle 43 is rotated in the opposite direction, the first concave surface 411 of the first driving surface 41 and the second concave surface 111 of the pressure member 11 are opposite to each other. The pressure member 11 has a space to move away from the inner tube 61, thereby unlocking the inner tube 61. At the same time, since the connecting rod 3 is not pressed down by the rolling member 44 and the second driving surface 42, under the elastic restoring force of the reset member 23, the mating member 21 moves upward, making way for the leftward translation of the moving member 22, thereby unlocking the inner tube 62.

[0064] The locking of the inner tube 1 61 and inner tube 2 62 can be in the state where the outer tube 5, inner tube 1 61 and inner tube 2 62 are fully extended, partially extended or fully retracted, and there are no specific restrictions.

[0065] like Figure 23 As shown, the aforementioned telescopic legs can be used in photography tripods, photography softbox tripods, selfie tripods, or photography light tripods, with no specific limitations.

[0066] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A telescopic tube locking mechanism, characterized in that, include: The connecting rod (3) extends along the axial length of the telescopic tube; The first locking unit (1) and the second locking unit (2) are respectively located at both ends of the connecting rod (3); The drive unit (4) is in transmission cooperation with the first locking unit (1) and the connecting rod (3); When an external force is applied to the drive unit (4), the first locking unit (1) can be driven to move toward or away from the wall of the telescopic tube, while the second locking unit (2) is triggered by the connecting rod (3) to move toward or away from the wall of the telescopic tube.

2. The telescopic tube locking mechanism according to claim 1, characterized in that: The drive unit (4) includes a handle (43), a first drive surface (41) and a second drive surface (42) disposed on the handle (43), and a rolling element (44) abutting against the second drive surface (42), the rolling element (44) abutting against the connecting rod (3); the first locking unit (1) includes a pressure element (11) abutting against the first drive surface (41).

3. The telescopic tube locking mechanism according to claim 2, characterized in that: When an external force is applied to the handle (43), the first drive surface (41) has a component of movement along a first direction, and the second drive surface (42) has a component of movement along a second direction, wherein the first direction and the second direction are perpendicular to each other.

4. The telescopic tube locking mechanism according to claim 3, characterized in that: The first driving surface (41) has at least a first concave surface (411) and a first convex surface (412), and the pressure member (11) has a second concave surface (111) and a second convex surface (112). When an external force is applied to rotate the handle (43), the first convex surface (412) can be rotated to engage with the second convex surface (112) or with the second concave surface (111).

5. The telescopic tube locking mechanism according to claim 3, characterized in that: The second driving surface (42) is an arc-shaped notch. The distance between the bottom surface of the arc-shaped notch and the rotation center of the handle (43) changes so that the volume of the arc-shaped notch accommodating the rolling element (44) changes.

6. The telescopic tube locking mechanism according to claim 2, characterized in that: The handle (43) has a rotating column (431), the first driving surface (41) and the second driving surface (42) are disposed on the rotating column (431), and the pressure member (11) is coaxially connected with the rotating column (431).

7. The telescopic tube locking mechanism according to claim 1, characterized in that: The second locking unit (2) includes a mating part (21) connected to the connecting rod (3), a movable part (22) abutting against the mating part (21), a reset part (23) abutting against the mating part (21), and a limiting cavity (24). The mating part (21) and the movable part (22) are located in the limiting cavity (24). The connecting rod (3) moves axially, which can drive the mating part (21) to compress the reset part (23), so that the movable part (22) moves in a direction closer to or away from the wall of the telescopic tube.

8. The telescopic tube locking mechanism according to claim 7, characterized in that: The mating part (21) and the movable part (22) are mated together by inclined surfaces. The end of the telescopic tube has a joint, which has a positioning part (521) for limiting the translation of the movable part (22) and a window part (522) for the movable part (22) to extend out.

9. A telescopic leg tube, characterized in that, include: The outer tube (5), the inner tube one (61) and the inner tube two (62) which are telescopically connected to the outer tube (5), and the telescopic tube locking mechanism as described in any one of claims 1-7, apply external force to the driving unit (4) to drive the first locking unit (1) to move toward or away from the telescopic tube wall, and at the same time trigger the second locking unit (2) part to move toward or away from the telescopic tube wall through the connecting rod (3) to achieve locking or unlocking of the outer tube (5), the inner tube one (61) and the inner tube two (62).

10. The telescopic leg tube according to claim 9, characterized in that: The outer tube (5) has a first joint (51) and a second joint (52). The first locking unit (1) is located at the first joint (51), and the second locking unit (2) is located at the second joint (52). The first locking unit (1) moves toward or away from the wall of the inner tube (61) to lock or unlock the inner tube (61). Part of the second locking unit (2) moves toward or away from the wall of the inner tube (62) to lock or unlock the inner tube (62). The outer tube (5), inner tube (61), and inner tube (62) are irregular tubes with a transverse width greater than a longitudinal width. The telescopic tube locking mechanism is located on one side of the transverse width. The pressure member (11) has a first contact surface (113) that can fit against the outer wall of the inner tube (61), and the movable member (22) has a second contact surface (221) that can fit against the outer wall of the inner tube (62).

Images