CN112145520B - A key lock structure for tripod - Google Patents

A key lock structure for tripod Download PDF

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Publication number
CN112145520B
CN112145520B CN202011115763.2A CN202011115763A CN112145520B CN 112145520 B CN112145520 B CN 112145520B CN 202011115763 A CN202011115763 A CN 202011115763A CN 112145520 B CN112145520 B CN 112145520B
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CN
China
Prior art keywords
locking
gear
pipe
groove
sleeve
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Expired - Fee Related
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CN202011115763.2A
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Chinese (zh)
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CN112145520A (en
Inventor
何圣斌
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Tianjin Botaitianyu Technology Development Co ltd
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Tianjin Botaitianyu Technology Development Co ltd
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Priority to CN202011115763.2A priority Critical patent/CN112145520B/en
Publication of CN112145520A publication Critical patent/CN112145520A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/14—Telescoping systems locking in intermediate non-discrete positions
    • F16B7/1418—Telescoping systems locking in intermediate non-discrete positions with a clamping collar or two split clamping rings tightened by a screw or a cammed latch member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/04—Clamping or clipping connections
    • F16B7/0406—Clamping or clipping connections for rods or tubes being coaxial
    • F16B7/0426—Clamping or clipping connections for rods or tubes being coaxial for rods or for tubes without using the innerside thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/06—Turnbuckles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/14—Telescoping systems locking in intermediate non-discrete positions
    • F16B7/149—Telescoping systems locking in intermediate non-discrete positions with a sleeve or ring having a tapered or conical surface

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

The invention discloses a one-key lock structure for a tripod, which comprises a gear assembly, a primary locking assembly, a secondary locking assembly, a pipe barrel and a hexagonal rod, wherein the gear assembly comprises a gear shaft and a gear shaft; the pipe barrel comprises an outer pipe, a middle pipe, a supporting pipe and an inner pipe; the gear assembly comprises a large gear, a small gear, a knob and a fixing piece; the hexagonal rod is a hexagonal long rod, and the top end of the hexagonal rod is coaxially and fixedly connected with the large gear; the primary locking assembly comprises a threaded tension rod, a threaded tension sleeve, an upper locking core, an upper locking piece fixing seat and an upper locking piece; the second-stage locking assembly comprises a lower locking sleeve and a lower locking strip. The one-key locking structure for the tripod is convenient and quick to lock by one key, is easy to adjust the height and has long service life.

Description

A key lock structure for tripod
Technical Field
The invention relates to the technical field of tripods, in particular to a one-key lock structure for a tripod.
Background
Tripod stands have become one of indispensable important articles in the field of camera photography, and most of the tripods on the market today are multi-section locking structures or marble pin structures, the multi-section locking structures need to manually stretch the supporting legs of the tripods layer by layer through an elastic fixing sleeve, so that the tripod stands are troublesome to use, and too many connecting points which need to be manually loosened are easy to damage; the marble pin is simple in structure and easy to use, but the service life of the marble pin is greatly shortened due to the loss of the spring, and meanwhile, the height of the marble pin is not convenient to adjust.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it would be desirable to provide a one-key locking structure for a tripod that is convenient and fast to lock, easy to adjust in height, and long in service life.
The invention provides a one-key lock structure for a tripod, which comprises a gear assembly, a primary locking assembly, a secondary locking assembly, a pipe barrel and a hexagonal rod, wherein the gear assembly is arranged on the gear assembly; the pipe barrel comprises an outer pipe, a middle pipe, a supporting pipe and an inner pipe; the outer pipe is sleeved outside the middle pipe; the middle pipe is sleeved outside the supporting pipe; the supporting tube is sleeved outside the inner tube;
the gear assembly comprises a large gear, a small gear, a knob and a fixing piece; the large gear and the small gear are both circular gears, and the diameter of the large gear is larger than that of the small gear; three small gears are uniformly arranged along the circumferential direction of the big gear and are all meshed with the big gear; the top end of the inner wall of the knob is provided with internal teeth; the internal teeth are meshed with the pinion;
the hexagonal rod is a hexagonal long rod, and the top end of the hexagonal long rod is coaxially and fixedly connected with the large gear;
the primary locking assembly comprises a threaded tightening rod, a threaded tightening sleeve, an upper locking core, an upper locking piece fixing seat and an upper locking piece; the axis of the threaded tension rod is provided with a hexagonal through hole; the hexagonal rod penetrates through the through hole and is in sliding connection with the through hole; the lower part of the threaded tensioning rod is in threaded connection with the upper part of the threaded tensioning sleeve; the upper part of the threaded tensioning rod is provided with a first rotating groove; the upper locking core is rotatably connected with the first rotating groove; a second rotating groove is formed in the middle of the threaded tensioning sleeve; the bottom of the upper locking piece fixing seat is movably connected with the second rotating groove through an expansion pin; the upper locking pieces are uniformly arranged in three numbers along the circumferential direction of the upper locking piece fixing seat and are fixedly connected with the upper part of the upper locking piece fixing seat;
the secondary locking assembly comprises a lower locking sleeve and a lower locking strip; three lower locking strips are uniformly arranged along the circumferential direction of the supporting tube and are fixedly connected with the bottom end of the supporting tube; the top end of the supporting tube is fixedly connected with the thread tensioning sleeve; the lower locking strip is arranged in the lower locking sleeve.
Preferably, the fixing part comprises a gear seat and a knob seat; three fixing blocks are uniformly and fixedly arranged on the bottom surface of the gear seat along the circumferential direction; the circumferential spacing space of the fixing block is used for fixedly placing the pinion; the knob is rotatably sleeved on the outer walls of the gear seat and the knob seat; the gear seat is fixedly connected with the knob seat through screws.
Preferably, the outer wall of the upper locking core is provided with a first upper bulge and a first lower groove; the inner wall of the upper locking piece is provided with a first upper groove and a first lower bulge; the first upper bulge is matched with the first upper groove; the first lower groove is matched with the first lower bulge; the bottom surface of the first upper protrusion, the top surface of the first lower groove, the bottom surface of the first upper groove and the top surface of the first lower protrusion are all inclined surfaces.
Preferably, the inner wall of the lower locking sleeve is provided with a second upper protrusion and a second lower groove; the outer wall of the lower locking strip is provided with a second upper groove and a second lower bulge; the second upper bulge is matched with the second upper groove; the second lower groove is matched with the second lower bulge; the bottom surface of the second upper protrusion, the top surface of the second lower groove, the bottom surface of the second upper groove and the top surface of the second lower protrusion are all inclined surfaces.
Preferably, the top end of the outer tube is fixedly arranged on the inner wall of the knob seat; the top end of the middle pipe is fixedly arranged on the outer wall of the upper locking sheet fixing seat through an expansion pin; the top end of the supporting tube is fixedly arranged on the outer wall of the threaded tensioning sleeve through an expansion pin; the top end of the inner pipe is detachably provided with an inner pipe plug.
Preferably, the lower locking sleeve is fixedly connected with the bottom end of the middle pipe; the bottom end of the outer pipe is fixedly provided with an outer pipe sleeve.
Preferably, the inner walls of the outer pipe, the middle pipe and the inner pipe are all fixedly provided with vertical edges; vertical grooves are formed in the upper locking piece, the lower locking strip, the upper locking piece fixing seat and the outer wall of the inner pipe plug; the vertical groove is matched with the vertical edge.
Preferably, the expansion pin is a cylinder with a hole at the center, and the lower part of the expansion pin is cut into two symmetrical parts along the diameter direction; the bottom end of the expansion pin is a notch.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the hexagonal rod and the gear assembly are arranged, the gear wheel rotates to drive the hexagonal rod fixed in the shaft center through hole of the gear wheel to rotate, the hexagonal rod can stably drive the primary locking assembly to work, and when the primary locking assembly works, the supporting tube moves upwards to activate the secondary locking assembly to work, so that the function of one-key locking is achieved, and the integral device is convenient, rapid, flexible and convenient;
(2) according to the tripod, the upper locking pieces and the lower locking strips are arranged, the three upper locking pieces are jointly used for fixing the relative positions of the outer pipe and the middle pipe, the three lower locking strips are jointly used for fixing the relative positions of the supporting pipe and the inner pipe, and the elastic upper locking pieces and the elastic lower locking strips replace the traditional telescopic structure, so that the height of the tripod is flexibly and variably adjusted, the abrasion is reduced, and the service life of the tripod is prolonged;
(3) the vertical edges and the vertical grooves are arranged and matched with each other to position the pipe barrel, so that the pipe barrel is prevented from rotating, unnecessary circumferential friction is reduced, and the service life of the pipe barrel is prolonged.
It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic structural diagram of a key lock structure for a tripod according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a gear assembly for a key lock arrangement for a tripod according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a bull gear and pinion gear of a key lock structure for a tripod according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a gear seat and a knob seat of a key lock structure for a tripod according to an embodiment of the present invention;
FIG. 5 is a schematic view of a mount mounting arrangement for a key lock arrangement of a tripod according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a knob of a key lock mechanism for a tripod according to an embodiment of the present invention;
FIG. 7 is a schematic view of a primary lock assembly of a keyed structure for a tripod according to an embodiment of the present invention;
FIG. 8 is a schematic view of a tightening screw structure for a key lock structure of a tripod according to an embodiment of the present invention;
FIG. 9 is a schematic view of a threaded tightening rod and threaded tightening sleeve mounting structure for a keyed structure of a tripod according to an embodiment of the present invention;
FIG. 10 is a schematic view of an upper lock core and an upper lock plate fixing seat of a key lock structure for a tripod according to an embodiment of the present invention;
FIG. 11 is a schematic view of an upper locking plate and an upper locking core of a key lock structure for a tripod according to an embodiment of the present invention;
FIG. 12 is a schematic view of a secondary locking assembly of a one-key locking mechanism for a tripod according to an embodiment of the present invention;
FIG. 13 is a schematic view of a barrel configuration of a keying arrangement for a tripod according to an embodiment of the present invention;
FIG. 14 is a schematic view of a lower locking sleeve and an outer sleeve mounting structure of a key lock structure for a tripod according to an embodiment of the present invention;
FIG. 15 is a schematic view of an inner tubular block of a keying arrangement for a tripod according to an embodiment of the present invention;
FIG. 16 is a schematic view of an expansion pin for a key lock structure of a tripod according to an embodiment of the present invention.
Reference numbers in the figures: 1. a gear assembly; 2. a primary locking assembly; 3. a secondary locking assembly; 4. a tube barrel; 5. a tensioning pin; 6. a hexagonal bar; 7. vertical edges; 8. a vertical slot; 9. blocking an inner pipe;
11. a bull gear; 12. a pinion gear; 13. a knob; 14. a fixing member;
21. a threaded tightening rod; 22. a thread tightening sleeve; 23. an upper locking core; 24. an upper locking piece fixing seat; 25. an upper locking piece;
31. a lower locking sleeve; 32. a lower locking bar; 33. an outer pipe sleeve;
41. an outer tube; 42. a middle tube; 43. supporting a tube; 44. an inner tube;
131. internal teeth; 141. a gear seat; 142. a knob seat;
211. a first rotating groove; 221. a second rotating groove; 231. a first upper projection; 232. a first lower groove; 251. a first upper groove; 252. a first lower projection;
311. a second upper projection; 312. a second lower groove; 321. a second upper groove; 322. a second lower projection;
1411. and (5) fixing blocks.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for the convenience of description, only the portions relevant to the application are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 16, an embodiment of the present invention provides a one-key lock structure for a tripod, including a gear assembly 1, a primary locking assembly 2, a secondary locking assembly 3, a pipe barrel 4 and a hexagonal rod 6; the tube 4 includes an outer tube 41, a middle tube 42, a support tube 43, and an inner tube 44; the outer pipe 41 is sleeved outside the middle pipe 42; the middle tube 42 is sleeved outside the supporting tube 43; the supporting tube 43 is sleeved outside the inner tube 44;
the gear assembly 1 comprises a gearwheel 11, a pinion 12, a knob 13 and a fixing piece 14; the bull gear 11 and the pinion gear 12 are both circular gears, and the diameter of the bull gear 11 is larger than that of the pinion gear 12; three small gears 12 are uniformly arranged along the circumferential direction of the big gear 11 and are all meshed with the big gear 11; the top end of the inner wall of the knob 13 is provided with internal teeth 131; the internal teeth 131 mesh with the pinion gear 12;
the hexagonal rod 6 is a hexagonal long rod, and the top end of the hexagonal rod is coaxially and fixedly connected with the large gear 11;
the primary locking assembly 2 comprises a threaded tightening rod 21, a threaded tightening sleeve 22, an upper locking core 23, an upper locking sheet fixing seat 24 and an upper locking sheet 25; the axis of the threaded tension rod 21 is provided with a hexagonal through hole; the hexagonal rod 6 penetrates through the through hole and is in sliding connection with the through hole; the lower part of the threaded tightening rod 21 is in threaded connection with the upper part of the threaded tightening sleeve 22; the upper part of the thread tensioning rod 21 is provided with a first rotating groove 211; the upper locking core 23 is rotatably connected with the first rotating groove 211; the middle part of the threaded tightening sleeve 22 is provided with a second rotating groove 221; the bottom of the upper locking piece fixing seat 24 is movably connected with the second rotating groove 221 through the expansion pin 5; three upper locking pieces 25 are uniformly arranged along the circumferential direction of the upper locking piece fixing seat 24 and are fixedly connected with the upper part of the upper locking piece fixing seat 24;
the secondary locking assembly 3 comprises a lower locking sleeve 31 and a lower locking strip 32; three lower locking strips 32 are uniformly arranged along the circumferential direction of the supporting tube 43 and are fixedly connected with the bottom end of the supporting tube 43; the top end of the supporting tube 43 is fixedly connected with the thread tensioning sleeve 22; the lower locking strip 32 is disposed inside the lower locking sleeve 31. In the embodiment, the large gear 11, the small gear 12 and the knob 13 are in gear tooth meshing, when the knob 13 is rotated, the knob 13 drives the meshed small gear 12 to rotate, the small gear 12 rotates to drive the large gear 11 and the hexagonal rod 6 to rotate, and the hexagonal rod 6 rotates to trigger the primary locking assembly 2 and the secondary locking assembly 3, so that one-key locking is realized; when the hexagonal rod 6 rotates, the threaded tightening rod 21 is firstly driven to rotate, and the threaded tightening sleeve 22 and the threaded tightening rod 21 are connected through threads, so that the threaded tightening sleeve 22 can rotate upwards under the action of the threads, and the threads determine that the threaded tightening sleeve 22 and the threaded tightening rod 21 can only simultaneously move relatively.
In a preferred embodiment, the fixing member 14 includes a gear seat 141 and a knob seat 142; three fixing blocks 1411 are uniformly and fixedly arranged on the bottom surface of the gear seat 141 along the circumferential direction; the circumferential space of the fixing block 1411 is used for fixedly placing the pinion 12; the knob 13 is rotatably sleeved on the outer walls of the gear seat 141 and the knob seat 142; the gear seat 141 and the knob seat 142 are fixedly connected by screws.
Referring to fig. 2 to 6, in this embodiment, the gear seat 141 is fixedly connected to the knob seat 142, the large gear 11 and the small gear 12 are rotatably disposed at a connection position of the fixing member 14 through an insertion rod of the gear axis and an insertion groove of the fixing member 14, a portion of the small gear 12 exposed out of the fixing block 1411 is engaged with the internal teeth 131, the knob 13 is rotatably sleeved on an outer wall of the fixing member 14, and only the knob 13 needs to be rotated during operation, so that one-key locking can be achieved, and the operation is simple and convenient.
In a preferred embodiment, the outer wall of the upper lock core 23 is provided with a first upper protrusion 231 and a first lower groove 232; the inner wall of the upper locking piece 25 is provided with a first upper groove 251 and a first lower protrusion 252; the first upper protrusion 231 is matched with the first upper groove 251; the first lower groove 232 is matched with the first lower protrusion 252; the bottom surface of the first upper protrusion 231, the top surface of the first lower groove 232, the bottom surface of the first upper groove 251, and the top surface of the first lower protrusion 252 are all inclined surfaces.
Referring to fig. 7, 11 and 12, in this embodiment, the primary locking assembly 2 is used to determine the position relationship between the outer tube 41 and the middle tube 42; the secondary locking assembly 3 is used to determine the positional relationship of the support tube 43 and the inner tube 44.
In a preferred embodiment, the inner wall of the lower lock sleeve 31 is provided with a second upper protrusion 311 and a second lower groove 312; the outer wall of the lower locking strip 32 is provided with a second upper groove 321 and a second lower protrusion 322; the second upper protrusion 311 is matched with the second upper groove 321; the second lower groove 312 mates with the second lower protrusion 322; the bottom surface of the second upper protrusion 311, the top surface of the second lower groove 312, the bottom surface of the second upper groove 321, and the top surface of the second lower protrusion 322 are all inclined surfaces.
Referring to fig. 11 and 12, in this embodiment, the upper locking plate 25 and the lower locking strip 32 are provided with protrusions and grooves, each protrusion or groove is provided with an inclined surface, the corresponding upper locking core 23 and the lower locking sleeve 31 are provided with grooves and protrusions, and each groove or protrusion is provided with an inclined surface. The inclined plane of the groove is clung to the inclined plane of the matched bulge, and the inclined plane of the bulge is clung to the inclined plane of the matched groove. When the upper locking core 23 rotates and displaces downwards, the first upper protrusion 231 and the first lower groove 232 both displace downwards, and under the relative movement of the inclined surfaces of the first upper protrusion 231 and the first lower groove 232, the inclined surfaces of the first upper groove 251 and the first lower protrusion 252 are subjected to the force transmitted by the inclined surfaces of the first upper protrusion 231 and the first lower groove 232, and the upper locking piece 25 is forced to deform outwards to support the outer tube 41; when the supporting tube 43 moves upward, the lower locking strip 32 is driven to move upward, the second upper groove 321 and the second lower protrusion 322 both move upward, but because the lower locking strip 32 is located inside the lower locking sleeve 31, the lower locking sleeve 31 is fixed at the bottom end of the middle tube 42, the middle tube 42 does not move, under the relative movement of the inclined planes of the second upper groove 321 and the second lower protrusion 322, the inclined planes of the second upper protrusion 311 and the second lower groove 312 receive the force transmitted by the inclined planes of the second upper groove 321 and the second lower protrusion 322, and the lower locking strip 32 is forced to contract inward to clamp the inner tube 44.
In a preferred embodiment, the top end of the outer tube 31 is fixedly disposed on the inner wall of the knob seat 142; the top end of the middle pipe 42 is fixedly arranged on the outer wall of the upper locking sheet fixing seat 24 through an expansion pin 5; the top end of the supporting tube 43 is fixedly arranged on the outer wall of the threaded tensioning sleeve 22 through the tensioning pin 5; the top end of the inner pipe 44 is detachably provided with an inner pipe plug 9.
Referring to fig. 1, 7, 14 and 15, in this embodiment, an inner plug 9 is disposed inside the lower locking sleeve 31, and the inner plug 9 is detachably disposed at the top end of the inner tube 44 for limiting the position of the inner tube 44 and ensuring that the inner tube 44 is not pulled out of the supporting tube 43.
In a preferred embodiment, the lower locking collar 31 is fixedly attached to the bottom end of the middle tube 42; the bottom end of the outer tube 41 is fixedly provided with an outer jacket 33.
Referring to fig. 14, in this embodiment, the outer sleeve 33 covers the joint between the outer tube 41 and the middle tube 42, and the bottom end of the outer sleeve 33 protrudes inward to limit the position of the middle tube 42 and ensure that the middle tube 42 cannot be pulled out of the outer tube 41.
In a preferred embodiment, the inner walls of the outer tube 41, the middle tube 41 and the inner tube 44 are all fixedly provided with vertical ribs 7; the outer walls of the upper locking piece 25, the lower locking strip 32, the upper locking piece fixing seat 24 and the inner pipe plug 9 are all provided with vertical grooves 8; the vertical groove 8 is matched with the vertical rib 7.
Referring to fig. 7, 12, 13 and 15, in this embodiment, the vertical ribs 7 are located in the vertical grooves 8 and are mutually restricted to prevent the tubes 4 from rotating, so as to prevent the tubes 4 from rubbing against each other under normal conditions and prolong the service life of the tubes 4.
In a preferred embodiment, the expansion pin 5 is a cylinder with a hole in the center, and the lower part is cut into two symmetrical parts along the diameter direction; the bottom end of the expansion pin 5 is a notch.
Referring to fig. 16, in this embodiment, the bottom end of the expansion pin 5 can be inserted into a screw, and the round end portion of the screw is matched with the bottom end recess of the expansion pin 5.
The working principle of the invention is as follows:
locking operation: the knob 13 is rotated, the knob 13 drives the pinion 12, the pinion 12 drives the gearwheel 11, the gearwheel 11 drives the hexagonal rod 6, the rotation of the hexagonal rod 6 drives the thread tensioning rod 21 to rotate downwards, the thread action enables the thread tensioning sleeve 22 to rotate upwards, the upper locking core 23 moves downwards, the upper locking piece fixing seat 24 moves upwards, the upper locking piece 25 moves upwards, the inclined surface on the upper locking piece 25 is staggered with the inclined surface on the upper locking core 23 under the displacement action, the upper locking piece 25 deforms under the mutual acting force when the inclined surfaces are staggered and supports the outer tube 41, and the primary locking assembly 2 is locked;
when the screw tightening sleeve 22 moves upwards, the supporting tube 43 fixed on the screw tightening sleeve 22 moves upwards to drive the lower locking strip 32 at the bottom end of the supporting tube 43 to move upwards, the inclined plane on the lower locking strip 32 and the inclined plane on the lower locking sleeve 31 are staggered under the displacement effect, the lower locking strip 32 deforms under the interaction when the inclined planes are staggered, but because the lower locking sleeve 31 is fixed on the periphery of the lower locking strip 32, the lower locking strip 32 can only deform inwards to shrink and clamp the inner tube 44, the secondary locking assembly 3 locks, and at the moment, the positions of the middle tube 42 and the inner tube 44 are locked and fixed.
Unlocking operation: the knob 13 is rotated, the knob 13 drives the pinion 12, the pinion 12 drives the bull gear 11, the bull gear 11 drives the hexagonal rod 6, the rotation of the hexagonal rod 6 drives the thread tensioning rod 21 to rotate upwards, the thread action enables the thread tensioning sleeve 22 to rotate downwards, the upper locking core 23 moves upwards, the upper locking piece fixing seat 24 moves downwards, the upper locking piece 25 moves downwards, the inclined surface on the upper locking piece 25 is attached to the inclined surface on the upper locking core 23 again, and the primary locking assembly 2 is unlocked;
when the screw tightening sleeve 22 moves downwards, the supporting tube 43 fixed on the screw tightening sleeve 22 moves downwards to drive the lower locking strip 32 at the bottom end of the supporting tube 43 to move downwards, the inclined surface on the lower locking strip 32 is attached to the inclined surface on the lower locking sleeve 31 again, the secondary locking assembly 3 is unlocked, and the middle tube 42 and the inner tube 44 can be freely stretched and contracted at the moment.
In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (8)

1. A key lock structure for a tripod is characterized by comprising a gear assembly, a primary locking assembly, a secondary locking assembly, a pipe barrel and a hexagonal rod; the pipe barrel comprises an outer pipe, a middle pipe, a supporting pipe and an inner pipe; the outer pipe is sleeved outside the middle pipe; the middle pipe is sleeved outside the supporting pipe; the supporting tube is sleeved outside the inner tube;
the gear assembly comprises a large gear, a small gear, a knob and a fixing piece; the bull gear and the pinion are both circular gears, and the diameter of the bull gear is larger than that of the pinion; three small gears are uniformly arranged along the circumferential direction of the big gear and are all meshed with the big gear; the top end of the inner wall of the knob is provided with internal teeth; the internal teeth are meshed with the pinion;
the hexagonal rod is a hexagonal long rod, and the top end of the hexagonal rod is coaxially and fixedly connected with the large gear;
the primary locking assembly comprises a threaded tightening rod, a threaded tightening sleeve, an upper locking core, an upper locking piece fixing seat and an upper locking piece; the axis of the threaded tensioning rod is provided with a hexagonal through hole; the hexagonal rod penetrates through the through hole and is in sliding connection with the through hole; the lower part of the threaded tensioning rod is in threaded connection with the upper part of the threaded tensioning sleeve; the upper part of the threaded tensioning rod is provided with a first rotating groove; the upper locking core is rotatably connected with the first rotating groove; a second rotating groove is formed in the middle of the threaded tensioning sleeve; the bottom of the upper locking piece fixing seat is movably connected with the second rotating groove through an expansion pin; the number of the upper locking pieces is three along the circumferential direction of the upper locking piece fixing seat, and the upper locking pieces are fixedly connected with the upper part of the upper locking piece fixing seat;
the secondary locking assembly comprises a lower locking sleeve and a lower locking strip; three lower locking strips are uniformly arranged along the circumferential direction of the supporting tube and are fixedly connected with the bottom end of the supporting tube; the top end of the supporting tube is fixedly connected with the thread tensioning sleeve; the lower locking strip is arranged in the lower locking sleeve.
2. A keying structure for a tripod according to claim 1, wherein said fixing element comprises a gear wheel mount and a knob mount; three fixing blocks are uniformly and fixedly arranged on the bottom surface of the gear seat along the circumferential direction; the circumferential spacing space of the fixed block is used for fixedly placing the pinion; the knob is rotatably sleeved on the outer walls of the gear seat and the knob seat; the gear seat is fixedly connected with the knob seat through screws.
3. A keying structure for a tripod according to claim 2, wherein the outer wall of said upper lock core is provided with a first upper projection and a first lower recess; the inner wall of the upper locking piece is provided with a first upper groove and a first lower bulge; the first upper bulge is matched with the first upper groove; the first lower groove is matched with the first lower bulge; the bottom surface of the first upper protrusion, the top surface of the first lower groove, the bottom surface of the first upper groove and the top surface of the first lower protrusion are all inclined surfaces.
4. A keying structure for a tripod according to claim 3, wherein the inner wall of said lower locking bush is provided with a second upper projection and a second lower recess; the outer wall of the lower locking strip is provided with a second upper groove and a second lower bulge; the second upper bulge is matched with the second upper groove; the second lower groove is matched with the second lower bulge; the bottom surface of the second upper protrusion, the top surface of the second lower groove, the bottom surface of the second upper groove and the top surface of the second lower protrusion are all inclined surfaces.
5. A keying structure for a tripod according to claim 4, wherein the top end of said outer tube is fixedly disposed on the inner wall of said knob holder; the top end of the middle pipe is fixedly arranged on the outer wall of the upper locking sheet fixing seat through the expansion pin; the top end of the supporting tube is fixedly arranged on the outer wall of the threaded tensioning sleeve through the tensioning pin; the top end of the inner pipe is detachably provided with an inner pipe plug.
6. A keying structure for a tripod according to claim 5, wherein said lower locking bush is fixedly connected to a bottom end of said middle tube; and an outer pipe sleeve is fixedly arranged at the bottom end of the outer pipe.
7. A keying structure for a tripod according to claim 6, wherein the inner walls of said outer tube, said middle tube and said inner tube are all fixedly provided with vertical ribs; vertical grooves are formed in the outer walls of the upper locking piece, the lower locking strip, the upper locking piece fixing seat and the inner pipe plug; the vertical groove is matched with the vertical edge.
8. A keying structure for a tripod according to claim 7, wherein said expansion pin is a cylindrical body with a central opening and a lower portion cut diametrically into two symmetrical parts; the bottom end of the expansion pin is a notch.
CN202011115763.2A 2020-10-19 2020-10-19 A key lock structure for tripod Expired - Fee Related CN112145520B (en)

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CN113090903B (en) * 2021-03-31 2022-11-15 东莞市洋葱网络科技有限公司 Extensible supporting leg and unipod
CN112856168B (en) * 2021-03-31 2022-11-15 东莞市洋葱网络科技有限公司 Tripod
CN113775614B (en) * 2021-09-14 2023-03-03 海安奥克机械制造有限公司 Effectual locking device for lifting equipment of theftproof

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