Multi-position locking telescopic rod

Abstract

The invention relates to a multi-position locking telescopic rod which comprises multiple sections of pipe fittings, a locking assembly is arranged between any two adjacent sections of pipe fittings, the first end of the first pipe fitting is sleeved with a control sleeve, the control sleeve rotates relative to the first pipe fitting, a base is arranged on the first pipe fitting, a transmission piece is arranged on the base, and the transmission piece is connected with the control sleeve. The first end of the locking rod is fixedly connected to the transmission piece, and the second end of the locking rod is connected with the second pipe fitting. The forward rotation of the control sleeve drives the transmission part to rotate, so that the pipe fittings are sequentially locked by the corresponding locking assemblies from the small pipe diameter to the large pipe diameter to be in a locked state, and the reverse rotation of the control sleeve drives the transmission part to rotate, so that the pipe fittings are sequentially separated from the small pipe diameter to the large pipe diameter to be in an unlocked state. The tripod has the advantages that the locking rod can be driven to rotate by rotating the control sleeve arranged at the upper end of the telescopic rod, so that multi-position locking or loosening of the foot pipe is achieved, operation is easy and convenient, and the tripod is not prone to toppling over in the adjusting process.

Description

Technical Field

[0001] The invention relates to a multi-position locking telescopic rod. Background Art

[0002] With the development of society, people have an increasing demand for instant shooting, outdoor short video shooting and image travel shooting. Most of these consumers are personal self-media and photography enthusiasts, so they require the tripod to be light, small to store and inexpensive. However, the legs of tripods on the market generally use a locking structure of a lever and a screw sleeve, which makes the leg locking assembly have many parts, complex structure and high cost. In addition, the more leg sections there are, the more exposed locking components there are, and the longer the leg is after being stored.

[0003] In the Chinese patent document (authorization announcement number CN218408056U), a new locking assembly structure is used to solve the above-mentioned problem. However, the structure requires rotating the leg tube with a smaller outer diameter when locking or unlocking. If there are many leg tubes on the supporting legs, people need to lift the tripod or squat to adjust the lowest leg tube when using it, which is not only inconvenient to operate, but also may cause the tripod to tip over during the adjustment process.

[0004] Therefore, the existing structure needs to be further improved. Summary of the invention

[0005] The object of the present invention is to provide a multi-position locking telescopic rod which is simple and convenient to operate.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A multi-position locking telescopic rod, comprising multiple energy-saving pipes that are sequentially sleeved and can slide relative to each other axially, a locking assembly is arranged between any two adjacent pipes, and among the pipes, the first pipe has the largest outer diameter and the second pipe has the smallest outer diameter; a control sleeve is sleeved on the first end of the first pipe, and the control sleeve can rotate relative to the first pipe around the central axis of the first pipe, the first pipe is provided with a base, and a transmission member that is transmission-connected to the control sleeve is provided on the base, the first end of the locking rod is fixedly connected to the transmission member and the second end is connected to the second pipe; the forward rotation of the control sleeve drives the transmission member to rotate, so that each pipe from the smallest diameter to the largest diameter is in a locked state under the mutual locking of each corresponding locking assembly, and the reverse rotation of the control sleeve drives the transmission member to rotate, so that each pipe from the smallest diameter to the largest diameter is separated from each other in sequence and has an unlocked state.

[0008] The advantage of the present invention is that the locking rod can be driven to rotate by rotating the control sleeve disposed on the upper end of the telescopic rod, thereby realizing multi-position locking or loosening of the leg tubes, which is not only simple and convenient to operate but also not easy to cause the tripod to tip over during the adjustment process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of a multi-position locking telescopic rod in an embodiment of the present invention.

[0010] Figure 2 It is a three-dimensional schematic diagram of the exploded state of the multi-position locking telescopic rod in an embodiment of the present invention.

[0011] Figure 3 It is a longitudinal cross-sectional view of a multi-position locking telescopic rod in an embodiment of the present invention.

[0012] Figure 4 for Figure 3 A magnified schematic diagram of I in the figure.

[0013] Figure 5 The multi-position locking telescopic rod in the embodiment of the present invention is Figure 3 Cross-sectional view at AA in the middle.

[0014] Figure 6 for Figure 3 A magnified schematic diagram of II.

[0015] Figure 7 The multi-position locking telescopic rod in the embodiment of the present invention is Figure 3 Cross-sectional view at BB in the middle.

[0016] Figure 8 for Figure 3 Enlarged schematic diagram of III.

[0017] Fig. 9 The multi-position locking telescopic rod in the embodiment of the present invention is Figure 3 Cross-sectional view at CC.

[0018] Fig.10 for Figure 3 Schematic diagram of enlarged view of IV.

[0019] Fig.11 The multi-position locking telescopic rod in the embodiment of the present invention is Figure 3 Cross-sectional view at DD in the middle.

[0020] Fig.12 for Figure 3 Enlarged schematic diagram of V in the figure.

[0021] Fig.13 The multi-position locking telescopic rod in the embodiment of the present invention is Figure 3 Cross-sectional view at EE in the middle. DETAILED DESCRIPTION

[0022] As attached Figure 1 To Attachment Fig.13As shown, a multi-position locking telescopic rod comprises a plurality of pipes which are sequentially sleeved and can slide relative to each other in the axial direction. Among the pipes, the first pipe 11 has the largest outer diameter and the second pipe 12 has the smallest outer diameter. In this embodiment, there are four pipes in total. Different numbers of pipes can be configured on telescopic rods of different lengths. The remaining two pipes between the first pipe 11 and the second pipe 12 are defined as intermediate pipes, and are defined as the third pipe 13 and the fourth pipe 14 in descending order of outer diameter. A locking assembly is provided between any two adjacent pipes, so that multi-position locking can be achieved.

[0023] A control sleeve 21 is sleeved on the first end of the first pipe member 11 . The control sleeve 21 can rotate relative to the first pipe member 11 around the central axis of the first pipe member 11 .

[0024] A base 22 is provided on the first pipe fitting 11. Specifically, the base 22 has an installation cavity, the inner wall of the installation cavity is provided with an internal thread, the outer wall of the end of the first pipe fitting 11 is formed with an external thread, the end of the first pipe fitting 11 is inserted into the installation cavity, and the internal thread and the external thread are screwed together, so that the base 22 is fixedly installed on the first pipe fitting 11.

[0025] A transmission member connected to the control sleeve 21 is provided on the base 22, and a first end of a locking rod 3 is fixedly connected to the transmission member. An inner gear 23 is provided on the inner side wall of the control sleeve 21. Specifically, the inner gear 23 is fixedly connected to the control sleeve 21 through a threaded structure. The transmission member is a sun gear 24, and a plurality of planetary gears 25 provided on the base 22 are meshed and connected between the inner gear 23 and the sun gear 24. The forward or reverse rotation of the control sleeve 21 causes the inner gear 23 to drive the planetary gears 25 to transmit, so that the sun gear 24 rotates accordingly, and the locking rod 3 also rotates along with the rotation of the sun gear 24.

[0026] The base 22 is formed with a through hole in the installation cavity, and the internal gear 23 has a rotating shaft, which passes through the through hole and is butt-connected with the end of the locking rod 3. Thus, the control sleeve 21 is fixed to the first pipe 11 in the axial direction.

[0027] The locking assembly includes a locking plate 41 and an anti-slip plate 42; between two adjacent sections of pipe fittings, the locking plate 41 is fixed on the pipe fitting with a smaller outer diameter, and the anti-slip plate 42 and the pipe fitting with a larger outer diameter are relatively fixed in the circumferential direction but can slide relatively in the axial direction; the anti-slip plate 42 is provided with an anti-slip plate gradient portion 421 with a gradient thickness, and the locking plate 41 is provided with a locking plate gradient portion 411 with a gradient thickness and matching the shape of the anti-slip plate gradient portion 421.

[0028] During the rotation of the pipe with a smaller outer diameter, the locking piece gradient portion 411 has a locking state in which it is engaged with the anti-slip piece gradient portion 421 to lock two adjacent pipe sections, and an unlocking state in which it is separated from the anti-slip piece to unlock two adjacent pipe sections.

[0029] Between two adjacent sections of the pipe fittings, the inner wall of the pipe fitting with a larger outer diameter is provided with a plurality of slideways extending along the length direction of the pipe fitting, and each slideway is inserted with a piece of the anti-slip sheet 42, and the two side surfaces of the anti-slip sheet 42 abut against the two inner surfaces of the slideway, thereby achieving the purpose of relative fixation of the anti-slip sheet 42 and the pipe fitting with a larger outer diameter in the circumferential direction and relative sliding in the axial direction.

[0030] The anti-slip sheet 42 is provided with a notch portion, and the locking sheet 41 is fixedly arranged on the outer surface of the pipe with a smaller outer diameter corresponding to the anti-slip sheet 42 and is placed in the notch portion.

[0031] A fixing sleeve 43 is fixedly provided at the first end of each intermediate pipe, a limiting piece 44 is provided inside the fixing sleeve 43, a through hole is opened in the limiting piece 44, a damping protrusion is provided on the inner side wall of the through hole, after the corresponding pipe rod passes through the corresponding intermediate pipe rod, its top end abuts against the limiting piece 44 and is prevented from passing through the corresponding intermediate pipe rod, and is fixedly connected to the limiting piece 44 by interference fit with the damping protrusion.

[0032] The upper end of the first pipe fitting 11 is fixedly connected to the base 22 through a threaded structure; a locking hole is opened on the side wall of the upper end of each of the other pipe fittings corresponding to the locking plate 41 of the locking assembly, and the inner wall of the locking plate 41 is provided with a clamping platform that cooperates with the clamping hole, and the clamping platform is clamped in the corresponding clamping hole.

[0033] The second end of the locking rod 3 is connected to the second pipe 12, and it is necessary to achieve that the second end of the locking rod 3 and the second pipe 12 can slide relative to each other in the axial direction and be relatively fixed in the circumferential direction so that the rotation of the locking rod 3 can drive the rotation of the second pipe 12.

[0034] Specifically, the locking rod 3 is composed of a number of energy-saving pipe rods that are matched with each locking component and are sequentially sleeved and can slide relative to the axial direction but are relatively fixed in the circumferential direction. The cross-section of each pipe rod perpendicular to its central axis is runway-shaped; a follower sleeve 45 is fixedly provided on the first end of the second pipe fitting 12, and the follower sleeve 45 has a runway-shaped through hole. The pipe rod corresponding to the second pipe fitting 12 is inserted into the through hole to realize the connection between the second end of the locking rod 3 and the second pipe fitting 12.

[0035] The forward rotation of the control sleeve 21 drives the locking rod 3 to rotate, so that each pipe fitting from the smallest to the largest diameter is locked in sequence by the corresponding locking components and has a locked state (starting from the second pipe fitting 12 and the fourth pipe fitting 14 to be locked), and the reverse rotation of the control sleeve 21 drives the transmission member to rotate, so that each pipe fitting from the smallest to the largest diameter is separated from each other in sequence and has an unlocked state (starting from the second pipe fitting 12 and the fourth pipe fitting 14 to be unlocked). Thus, the telescopic rod can be locked or unlocked in multiple positions.

[0036] When in use, people can not only lock or unlock the telescopic rod by rotating the control sleeve 21, but also lock or unlock the telescopic rod by rotating the tube with the smallest diameter in the telescopic rod (such as the second tube 12 in the embodiment).

[0037] In two adjacent pipes, one end of the pipe with a larger outer diameter is connected to the limiting sleeve 5, which has a step surface that abuts against the anti-slip sheet 42 to prevent the pipe with a smaller outer diameter from sliding out.

[0038] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention are all equivalent replacement modes and are included in the protection scope of the present invention.

Claims

1. A multi-position locking telescopic rod, comprising a plurality of pipes which are sequentially sleeved and can slide relative to each other axially, and a locking assembly is arranged between any two adjacent pipes, characterized in that: Among the pipe fittings, the first pipe fitting has the largest outer diameter and the second pipe fitting has the smallest outer diameter; a control sleeve is provided on the first end of the first pipe fitting, and the control sleeve can rotate relative to the first pipe fitting around the central axis of the first pipe fitting; a base is provided on the first pipe fitting, and a transmission member connected to the control sleeve is provided on the base; the first end of the locking rod is fixedly connected to the transmission member and the second end is connected to the second pipe fitting; the forward rotation of the control sleeve drives the transmission member to rotate, so that the pipe fittings from the smallest to the largest diameter are in a locked state under the mutual locking of the corresponding locking components, and the reverse rotation of the control sleeve drives the transmission member to rotate, so that the pipe fittings from the smallest to the largest diameter are separated from each other in sequence and are in an unlocked state.

2. A multi-position locking telescopic rod according to claim 1, characterized in that: The locking assembly includes a locking plate and a non-slip plate; between two adjacent pipe sections, the locking plate is fixed on the pipe section with a smaller outer diameter, the non-slip plate and the pipe section with a larger outer diameter are relatively fixed in the circumferential direction and can slide relatively in the axial direction; the non-slip plate is provided with a non-slip plate gradient portion with a gradual thickness change, and the locking plate is provided with a locking plate gradient portion with a gradual thickness change and matching the shape of the non-slip plate gradient portion; during the rotation of the pipe section with a smaller outer diameter, the locking plate gradient portion has a locking state in which it is mutually engaged with the non-slip plate gradient portion to lock the two adjacent pipe sections, and an unlocking state in which it is separated from the non-slip plate gradient portion to unlock the two adjacent pipe sections.

3. The multi-position locking telescopic rod according to claim 1, characterized in that: Between two adjacent pipe sections, the inner wall of the pipe with a larger outer diameter is provided with a plurality of slideways extending along the length direction of the pipe, each slideway is inserted with a non-slip sheet, and the two side surfaces of the non-slip sheet are in contact with the two inner surfaces of the slideway.

4. The multi-position locking telescopic rod according to claim 2, characterized in that: The anti-slip sheet is provided with a notch portion, and the locking sheet is fixedly arranged on the outer surface of the pipe with a smaller outer diameter corresponding to the anti-slip sheet and is placed in the notch portion.

5. The multi-position locking telescopic rod according to claim 4, characterized in that: In two adjacent pipe fittings, one end of the pipe fitting with a larger outer diameter is connected to a limiting sleeve, and the limiting sleeve has a limiting sleeve step surface that abuts against the anti-slip sheet to prevent the pipe fitting with a smaller outer diameter from sliding out.

6. The multi-position locking telescopic rod according to claim 4, characterized in that: The second end of the locking rod and the second pipe member can slide relative to each other in the axial direction and are relatively fixed in the circumferential direction.

7. The multi-position locking telescopic rod according to claim 6, characterized in that: The locking rod is composed of a number of energy-saving pipe rods that are sequentially sleeved and can slide relative to the axial direction but are relatively fixed in the circumferential direction for matching each locking component. The cross-section of each pipe rod perpendicular to its central axis is runway-shaped; a follower sleeve is fixedly provided on the first end of the second pipe fitting, and the follower sleeve has a runway-shaped through hole, and the pipe rod corresponding to the second pipe fitting is inserted into the through hole.

8. The multi-position locking telescopic rod according to claim 7, characterized in that: The other pipe fittings except the first pipe fitting and the second pipe fitting are defined as intermediate pipe fittings. A fixing sleeve is fixedly provided at the first end of each intermediate pipe fitting, a limiting piece is provided inside the fixing sleeve, a through hole is opened in the limiting piece, and a damping protrusion is provided on the inner side wall of the through hole. After the corresponding pipe rod passes through the corresponding intermediate pipe fitting, its top end abuts against the limiting piece and is prevented from passing through the corresponding intermediate pipe fitting and is fixedly connected to the limiting piece by interference fit with the damping protrusion.

9. The multi-position locking telescopic rod according to claim 8, characterized in that: The upper end of the first pipe fitting is fixedly connected to the base through a threaded structure; a locking hole is opened on the side wall of the upper end of each of the other pipe fittings corresponding to the locking plate of the locking assembly, and a clamping platform matching the clamping hole is provided on the inner wall of the locking plate, and the clamping platform is clamped in the corresponding clamping hole.

10. A multi-position locking telescopic rod according to any one of claims 1 to 9, characterized in that: An inner side wall of the control sleeve is provided with an internal gear, the transmission member is a sun gear, and a plurality of planetary gears arranged on a base are meshedly connected between the internal gear and the sun gear.

11. The multi-position locking telescopic rod according to claim 10, characterized in that: The internal gear is fixedly connected to the control sleeve through a threaded structure; the base has an installation cavity, the inner wall of the installation cavity is provided with an internal thread, the outer wall of the end of the first pipe fitting is formed with an external thread, the end of the first pipe fitting is inserted into the installation cavity, and the internal thread and the external thread are screwed together; the base has a through hole formed in the installation cavity, and the internal gear has a rotating shaft, which passes through the through hole and is butt-connected with the end of the locking rod.

Images