Transmission locking assembly

Abstract

The invention relates to a transmission locking assembly which comprises a pipe fitting, a control sleeve and a locking rod, the control sleeve is arranged on the pipe fitting in a sleeving mode and can rotate around the central axis of the pipe fitting relative to the pipe fitting, a base is arranged on the pipe fitting, a transmission piece in transmission connection with the control sleeve is arranged on the base, and the first end of the locking rod is fixedly connected to the transmission piece; the control sleeve rotates forwards or backwards to drive the transmission part to rotate forwards or backwards. The leg and foot length adjusting device has the advantages that when the leg and foot length adjusting device is applied to legs and feet, the locking rod can be driven to rotate by rotating the control sleeve so as to lock or loosen another pipe fitting sleeved with the locking rod, and the length of the legs and feet is convenient to adjust.

Description

Technical Field

[0001] The invention relates to a transmission locking assembly. 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 buckle 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 storage. Therefore, the existing ones need to be further improved. Summary of the invention

[0003] The object of the present invention is to provide a transmission locking assembly which is simple and convenient to operate.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A transmission locking assembly includes a pipe fitting, a control sleeve and a locking rod. The control sleeve is arranged on the pipe fitting and can rotate relative to the pipe fitting around the central axis of the pipe fitting. The pipe fitting is provided with a base, and a transmission member connected to the control sleeve is arranged on the base. The first end of the locking rod is fixedly connected to the transmission member; the forward or reverse rotation of the control sleeve drives the transmission member to rotate forward or reverse.

[0006] The advantage of the present invention is that when applied to legs and feet, the locking rod can be driven to rotate by rotating the control sleeve to lock or release another pipe member sleeved therewith, thereby facilitating the adjustment of the length of the legs and feet. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a three-dimensional schematic diagram of the transmission locking assembly in an embodiment of the present invention.

[0008] Figure 2 It is a three-dimensional schematic diagram of the exploded state of the transmission locking assembly in an embodiment of the present invention.

[0009] Figure 3 It is a longitudinal cross-sectional view of the transmission locking assembly in an embodiment of the present invention.

[0010] Figure 4 for Figure 3 A magnified schematic diagram of I in the figure.

[0011] Figure 5 The transmission locking assembly in the embodiment of the present invention is Figure 3 Cross-sectional view at AA in the middle.

[0012] Figure 6It is a schematic cross-sectional structural diagram of a first pipe fitting sleeved with another second pipe fitting with a smaller outer diameter in an embodiment of the present invention. DETAILED DESCRIPTION

[0013] As attached Figure 1 To Attachment Figure 5 As shown, a transmission locking assembly includes a pipe 11, a control sleeve 2 and a locking rod 3.

[0014] The control sleeve 2 is sleeved on the pipe 11 and can rotate relative to the pipe 11 around the central axis of the pipe 11 .

[0015] A base 41 is provided on the pipe fitting 11. Specifically, the base 41 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 pipe fitting 11 is formed with an external thread, the end of the pipe fitting 11 is inserted into the installation cavity, the internal thread and the external thread are screwed together, so that the base 41 is fixedly installed on the pipe fitting 11.

[0016] A transmission member that is transmission-connected to the control sleeve 2 is disposed on the base 41 , and a first end of the locking rod 3 is fixedly connected to the transmission member.

[0017] The inner wall of the control sleeve 2 is provided with an internal gear 21, and specifically, the internal gear 21 is fixedly connected to the control sleeve 2 through a threaded structure. The transmission member is a sun gear 42, and a plurality of planetary gears 43 provided on the base 41 are meshedly connected between the internal gear 21 and the sun gear 42. The positive or reverse rotation of the control sleeve 2 causes the internal gear 21 to drive the planetary gears 43 to transmit, so that the sun gear 42 rotates accordingly, and the locking rod 3 also rotates along with the rotation of the sun gear 42.

[0018] The base 41 is formed with a through hole in the installation cavity, and the internal gear 21 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 2 is fixed on the pipe 11 in the axial direction.

[0019] The cross section of the locking rod 3 perpendicular to its central axis is in a racetrack shape so as to be matched and connected with other pipe fittings 11, thereby enabling the locking or unlocking of two adjacent pipe fittings 11.

[0020] Specifically, when applying, as shown in the attached Figure 6 As shown, the pipe 11 (hereinafter referred to as the first pipe 12) is sleeved with another second pipe 13 with a smaller outer diameter, and the second pipe 13 is inside the first pipe 12 and can slide axially relative to the first pipe 12. A follower sleeve 5 is fixedly arranged inside the second pipe 13, and the follower sleeve 5 has a racetrack-shaped through hole, and the locking rod 3 is inserted into the through hole, so that the rotation of the locking rod 3 will also cause the second pipe 13 to rotate.

[0021] The inner wall of the first pipe 12 is provided with a plurality of installation grooves 121 extending axially along the first pipe 12 , and the installation grooves 121 are provided with locking plates 6 , and the locking plates 6 are provided with locking plate gradient portions 61 with gradient thickness matching the shape of the anti-slip gradient portion 71 described below.

[0022] The second pipe 13 is fixedly provided with a plurality of anti-slip sheets 7 which are spaced apart around the central axis of the second pipe 13 as the rotation axis. The anti-slip sheets 7 and the first pipe 12 are fixed in the circumferential direction and can slide relative to each other in the axial direction. The anti-slip sheet 7 is provided with an anti-slip sheet gradient portion 71 with a gradient thickness.

[0023] The locking piece gradient part 71 will have a locked state in which it is engaged with the anti-slip piece gradient part 61 to lock the first pipe 12 and the second pipe 13, and an unlocked state in which it is separated from the anti-slip piece to unlock the first pipe 12 and the second pipe 13 during the rotation of the second pipe 13. Therefore, when applied to the legs and feet, the locking rod 3 can be driven to rotate by rotating the control sleeve 2 to lock or release the other pipe 11 that is mutually sleeved with it, so as to facilitate the adjustment of the length of the legs and feet.

[0024] 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 transmission locking assembly, comprising a pipe fitting, characterized in that: The transmission locking assembly also includes a control sleeve and a locking rod. The control sleeve is arranged on the pipe fitting and can rotate relative to the pipe fitting around the central axis of the pipe fitting. A base is provided on the pipe fitting, and a transmission member connected to the control sleeve in transmission is provided on the base. The first end of the locking rod is fixedly connected to the transmission member; the forward or reverse rotation of the control sleeve drives the transmission member to rotate forward or reverse.

2. A transmission locking assembly according to claim 1, 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.

3. A transmission locking assembly according to claim 2, characterized in that: The internal gear is fixedly connected to the control sleeve via a threaded structure.

4. A transmission locking assembly according to claim 2, characterized in that: The base has an installation cavity, the inner wall of the installation cavity is provided with internal threads, the outer wall of the end of the pipe is formed with external threads, the end of the pipe is inserted into the installation cavity, and the internal threads and the external threads are screwed together.

5. A transmission locking assembly according to claim 4, characterized in that: The base is formed with a through hole 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.

6. A transmission locking assembly according to claim 1, characterized in that: The cross section of the transmission member perpendicular to its central axis is in the shape of a racetrack.

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