The present invention relates to an automatic leg tube locking device, a photography tripod, a unipod and a crutch.
Jitter is unavoidable for shooting photography or video in daily times, while a photography tripod which can provide a supporting force for the photographer is an indispensable photographic apparatus. The leg tube of the tripod is relatively long generally, which is inconvenient to carry; therefore, there appears more tripods the legs of which can be fastened in a telescopic manner in the market, so that the height of the tripod can be adjusted through adjusting the length of the leg tube according to the demands of the photographer.
It is found that the prior art at least has the following defects: the length of the leg tube needs to be adjusted through an external fastening part, which is inconvenient to adjust the length of the leg, and the locking force is limited, which generally refers to screw thread knob type or buckle extrusion type locking.
A technical problem to be solved by the present invention is to provide an automatic leg tube locking device which is convenient to use, increasing the locking force, quickly adjusting the loosing and locking of the leg, adjusting an individual or all of the leg tubes, and pulling the leg tube to any position and lock the leg tube automatically in a locking state.
The present invention provides an automatic leg tube locking device, including a guide switch and an truncated cone shaped guide post which are mutually cooperative in use, wherein the guide switch is a hollow cylinder without a bottom surface, the guide post is in a circular truncated cone shape, a plurality of through holes are evenly provided in the side surface of the guide switch, the through holes are adapted with locking shafts, a transmission mechanism is arranged between the guide switch and the guide post, so that the guide switch vertically moves along the inclined cylinder surface of the guide post and drives the locking shafts to move along the guide post, when the guide switch and the guide post rotate relative to each other.
Further, the upper surface of the guide post is provided with an inclined guide surface, and the inner bottom surface of the guide switch is provided with a mating surface that is mutually conflicting to the inclined guide surface.
Further, the inner bottom surface of the guide switch is fixedly provided with a guide nail, the lower end surface of the guide nail is a spherical surface, the upper surface of the guide post is provided with a guide slot adapted with the guide nail, and the guide slot is formed to have a depth that changed countinuously and gradually from deep to shallow.
Further, the lower portion of the guide post is provided with a spring and a connection screw, the connection screw traverses the spring and the guide post, and is threaded connected to the inner bottom surface of the guide switch.
Further, the through hole is an elliptical hole, and the locking shaft is in a drum shape.
Further, the through hole is a round hole, and the locking shaft is a round bead.
Further, a guard ring is arranged on a position of the circumferential/side surface of the guide switch excluding the through holes.
The present invention further provides a photography tripod, including any one of the automatic leg tube locking device mentioned above.
The present invention further provides a unipod, including any one of the automatic leg tube locking device mentioned above.
The present invention further provides a crutch, including any one of the automatic leg tube locking device mentioned above.
When utilizing the automatic leg locking device provided by the embodiment according to the present invention, for the photography tripod, the unipod and the crutch composed of multiple sections of tubes, the loosing and locking states of which can be quickly switched by holding one section of tube; for example, when an section of inner tube is rotated reversely opposite to the predetermined direction, the inner tube and the outer tube is in a loosing state; at this moment, the inner tube can telescope up and down in the outer tube; and the inner tube and the outer tube are in a locking state by rotating the last section of inner tube towards the predetermined direction; in the locking state, the inner tube is pulled down, the inner tube and the outer tube become a loosing state; at this moment, the inner tube can be locked to any position in the outer tube by pushing the inner tube upward at any position. With the above features, several technical effects are achieved: convenient to use, being capable of increasing the locking force, quickly adjusting the loosing and locking of the leg tube, adjusting the loosing and locking of the leg tube by single section or entirety, and pulling the leg tube to any position and locking the leg tube automatically in a locking state.
The drawings illustrated herein are intended to provide further understanding of the present invention, and constituting a part of the present application. Examplary embodiments and explanations of the present invention here are only for explanation of the present invention, but are not intended to inappropriately limit the present invention. In the drawings:
The present invention will be further described in details hereinafter with reference to the drawings and embodiments.
First Embodiment
Referring to
Through holes 31 are evenly formed in the side surface of the guide switch 3, the through holes 31 are adapted with locking shafts 5. As shown in
Referring to
Referring to
Method for installing and using the automatic leg tube locking device is as follows.
Second Embodiment
This embodiment differs from the first embodiment in that: as shown in
When utilizing the automatic leg locking device provided by the embodiment according to the present invention, for the photography tripod, the unipod and the crutch composed of multiple sections of tubes, the loosing and locking states of which can be quickly switched by holding one section of tube; for example, when an section of inner tube 92 is rotated reversely opposite to the predetermined direction, the inner tube 92 and the outer tube 91 is in a loosing state; at this moment, the inner tube 92 can telescope up and down in the outer tube 91; and the inner tube 92 and the outer tube 91 are in a locking state by rotating the last section of inner tube 92 towards the predetermined direction; in the locking state, the inner tube 92 is pulled down, the inner tube 92 and the outer tube 91 become a loosing state; at this moment, the inner tube 92 can be locked to any position in the outer tube 92 by pushing the inner tube 92 upward at any position.
The automatic leg tube locking device, the photography tripod, the unipod and the crutch provided by embodiments of the present invention are convenient to use, and are capable of increasing the locking force, quickly adjusting the loosing and locking of the leg tube, adjusting the loosing and locking of the leg tube by single section or entirety, pulling the leg tube to any position and lock the leg tube automatically in a locking status.
The above descriptions are merely preferred embodiments of the present invention, but are not intended to limit the present invention. For those skilled in the art, the present invention may have various alternations and modifications. Any modification, equivalent replacement, improvment and the like, made within the spirit and principle of the present invention, shall all fall within the protection scope of the present invention.
Number | Name | Date | Kind |
---|---|---|---|
2503997 | Miller | Apr 1950 | A |
2508039 | Neuwirth | May 1950 | A |
2542967 | Waechter | Feb 1951 | A |
2658777 | Gerard | Nov 1953 | A |
3419293 | Conrad | Dec 1968 | A |
4134703 | Hinners | Jan 1979 | A |
4294560 | Larkin | Oct 1981 | A |
4893810 | Lee | Jan 1990 | A |
4900182 | Stillwagon | Feb 1990 | A |
5492430 | Jones | Feb 1996 | A |
5593239 | Sallee | Jan 1997 | A |
6250839 | Lenhart | Jun 2001 | B1 |
6331091 | Cross | Dec 2001 | B2 |
6609686 | Malizia | Aug 2003 | B2 |
8297870 | Lenhart | Oct 2012 | B2 |
8418707 | Kim | Apr 2013 | B2 |
20020170587 | Uemura | Nov 2002 | A1 |
20040211034 | Chen | Oct 2004 | A1 |
20090274511 | Chen | Nov 2009 | A1 |
20100040406 | Lenhart | Feb 2010 | A1 |
20110248144 | Lee | Oct 2011 | A1 |
20130028656 | Lu | Jan 2013 | A1 |
20150059816 | Kim | Mar 2015 | A1 |
20160169420 | Hu | Jun 2016 | A1 |
Number | Date | Country |
---|---|---|
20 2015 00729 | Dec 2015 | DE |