Umbrella base sleeve clamping mechanism of sunshade

Abstract

An umbrella base sleeve clamping mechanism of a sunshade comprises a reducing inner pipe, an outer pipe, a threaded connector, a collet chuck and a knob, the threaded connector is formed at the upper end of the reducing inner pipe, the knob is rotationally sleeved on the threaded connector in a threaded mode, the collet chuck is of a conical clamping sleeve structure and is arranged in the knob, and the upper end of the collet chuck is fixedly connected with the upper end of the knob. When the rotary knob is screwed clockwise and moves downwards, the collet moves downwards along with the rotary knob, the conical surface of the collet abuts against and extrudes the conical hole of the screwed joint to be folded inwards, and the collet and the lower section of the sunshade inserted into the reducing inner pipe are clamped and locked. An inner pipe lantern ring is arranged at the bottom of the reducing inner pipe, an outer pipe lantern ring is arranged at the top of the outer pipe, the reducing inner pipe is sleeved with the outer pipe in a vertically movable mode, and the reducing inner pipe and the outer pipe are positioned in a telescopic mode through the inner pipe lantern ring and the outer pipe lantern ring. The sunshade fixing device is simple and reasonable in structure and convenient to operate, the height can be quickly adjusted, stress on the lower section of the sunshade is more uniform through the collet, the sunshade is not prone to being damaged, positioning is stable, and safety and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of outdoor parasols, in particular to an umbrella seat sleeve clamping mechanism of a parasol. Background Art

[0002] As an outdoor leisure tool, parasols are widely used in leisure places such as squares, beaches, parks and courtyards, providing people with a comfortable space to enjoy the cool. At present, most parasols used outdoors are large in area and need to be firmly connected to the umbrella base to prevent tipping over. The common connection method on the market is to use screws to tighten the lower section of the parasol to the umbrella base sleeve. When dealing with special environments such as the umbrella base under the table, a multi-section connection sleeve is used to prevent the umbrella base from being too high.

[0003] In the above-mentioned prior art, the screws used for tightening can easily push the lower section to deform and damage, and the lower section can easily break due to uneven force, which poses certain safety hazards. Moreover, the multi-section casing can be easily lost after a section is removed.

[0004] After investigation, the existing Chinese patent number CN202120574658.9, "A connecting device for a parasol", includes a connecting plate and a connecting piece. The connecting piece is composed of a rod and an end portion. The diameter of the end portion is greater than the diameter of the rod portion, and the length of the rod portion matches the thickness of the connecting plate. An opening matching the connecting piece is provided on the connecting plate. The inner diameter on one side of the opening is greater than the diameter of the end portion of the connecting piece, and the inner diameter on the other side is smaller than the diameter of the end portion of the connecting piece and not less than the diameter of the rod portion of the connecting piece. The connecting plate is arranged on the umbrella seat through the end portion of the connecting piece through the large inner diameter end of the opening. The connecting piece is moved to the small inner diameter end of the opening by rotating or sliding the connecting plate. A threaded hole is also provided on the umbrella seat, and a matching through hole is provided on the connecting plate. When the connecting piece moves to the small inner diameter end of the opening, the connecting plate and the umbrella seat are fixed together by screws passing through the through hole and the threaded hole. This structure is relatively convenient to operate, and only one screw is needed to fix the parasol, but the connecting plate needs to be fixed at the lower end of the column of the parasol, and the structure of the umbrella seat is not a conventional sleeve structure, so the versatility is not ideal and cannot meet the fixing needs of conventional parasols. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a parasol seat sleeve clamping mechanism for a parasol with a simple and reasonable structure, convenient and quick operation and stable and reliable positioning in view of the above technical status quo.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a sleeve clamping mechanism for an umbrella seat of a parasol, characterized in that: the sleeve clamping mechanism for the umbrella seat comprises a sleeve, a collet and a knob, wherein the sleeve comprises a variable diameter inner tube and an outer tube which can be telescopically connected, a threaded joint is formed on the top of the variable diameter inner tube, the knob can be movably sleeved on the threaded joint up and down and is connected to the threaded joint by threaded rotation, the collet is a conical sleeve structure, the collet is arranged in the knob, the upper end of the collet is connected to the upper end of the knob, and the collet The lower end of the collet is inserted into the through hole of the threaded joint, and the inner wall of the through hole has a downwardly inclined tapered hole that cooperates with the collet. When the knob is tightened clockwise and moved downward, the collet moves downward accordingly, and the conical surface of the collet is pressed against the conical hole of the threaded joint to be compressed inward and clamped and locked with the lower section of the parasol inserted into the variable diameter inner tube; an inner tube ring is provided at the bottom of the variable diameter inner tube, and an outer tube ring is provided at the top of the outer tube, and the lower end of the variable diameter inner tube can be movably sleeved in the outer tube up and down, and can be telescopically positioned with the outer tube through the inner tube ring and the outer tube ring.

[0007] As an improvement, a circle of positioning grooves is recessed on the outer wall of the lower end of the variable diameter inner tube, a plurality of longitudinal grooves are spaced apart at the lower end of the variable diameter inner tube, buckles that cooperate with the positioning grooves are convexly provided at annular intervals in the middle part of the inner wall of the inner tube sleeve, and positioning bosses that cooperate with the longitudinal grooves are spaced apart at annular intervals in the lower part of the inner wall of the inner tube sleeve. The inner tube sleeve is sleeved on the lower end of the variable diameter inner tube, and is positioned and connected to the variable diameter inner tube through the cooperation of the buckles and the positioning grooves, and the positioning bosses and the longitudinal grooves.

[0008] Furthermore, the upper end of the outer tube sleeve is folded to form a convex edge that abuts against the upper end surface of the outer tube, and a plurality of longitudinal slots are circumferentially spaced apart on the upper inner wall of the outer tube sleeve. Corresponding positioning convex ribs are formed on the inner wall of the upper end of the outer tube, and an annular groove for the lower end of the outer tube sleeve to be inserted is formed on the inner wall of the outer tube and below the positioning convex rib. The outer tube sleeve is inserted into the outer tube and positioned with the outer tube through the cooperation of the longitudinal slots and the positioning convex ribs.

[0009] Furthermore, guide ribs corresponding to the positioning ribs are convexly provided on the inner wall of the outer tube and below the positioning ribs, and straight grooves cooperating with the positioning ribs and guide ribs in the outer tube are concavely provided at longitudinal intervals on the outer wall of the inner tube collar, and the variable diameter inner tube moves up and down along the inner wall of the outer tube through the straight grooves of the inner tube collar and the guide ribs on the inner wall of the outer tube.

[0010] Furthermore, the outer wall of the inner tube ring is provided with outward fins at intervals in annular direction and abut against the inner wall of the outer tube, and the lower part of the inner wall of the outer tube ring is formed with a convex ring which abuts against the outer wall of the variable diameter inner tube. The variable diameter inner tube and the outer tube can be positioned at any height by the friction between the outward fins and the inner wall of the outer tube and the convex ring and the outer wall of the variable diameter inner tube.

[0011] Furthermore, the lower end of the outer tube ring is circumferentially spaced with strip grooves that penetrate the convex ring, and the buckle, outward fin, positioning boss, straight groove, longitudinal slot, positioning rib and guide rib are four evenly arranged, among which the buckle and the positioning boss are arranged at intervals and crosses, and the outward fin and the straight groove are arranged at intervals and crosses.

[0012] Furthermore, the upper part of the threaded joint is an expanded external thread section, the lower part of the threaded joint is a tapered transition section, the knob is a hollow sleeve structure, the inner wall of the knob has an internal thread that cooperates with the threaded joint, and the height of the internal thread of the knob is greater than the height of the external thread section of the threaded joint.

[0013] Furthermore, the collet is made of metal sheets and includes a plurality of circumferentially arranged V- or U-shaped clips, which are connected in sequence to form a tapered jacket with a cylindrical inner wall and a tapered outer wall. A connecting piece is protruding upward from the middle of each V-shaped or U-shaped clip, and the upper end of the connecting piece extends out of the tapered jacket and is folded outward to form an L-shaped buckle. An annular step is formed on the upper end of the inner wall of the knob, and a snap ring is provided in the annular step. The snap ring has a snap hole that cooperates with the L-shaped snap ring, and the upper end of the collet is fixed to the knob through the cooperation of the L-shaped snap ring and the snap hole of the snap ring, and the upper end of the tapered jacket can be abutted against the lower end surface of the annular step.

[0014] Furthermore, the number of the V-shaped or U-shaped clips is 6 to 10, and the number of the connecting pieces is correspondingly 6 to 10.

[0015] Finally, the collet is an integral piece, and the inner diameter of the collet is adapted to the lower inner diameter of the threaded connector. When the knob is rotated counterclockwise and moved upward, the lower end of the collet is located in the lower conical hole of the threaded connector.

[0016] Compared with the prior art, the utility model has the following advantages: a threaded joint is formed on the upper end of the variable diameter inner tube, a knob and a collet are arranged on the threaded joint, and the tightness of the internal collet is controlled by rotating the knob to achieve clamping and fixing of the lower section. The collet applies force more evenly to the lower section of the parasol and is not easy to damage the parasol; the variable diameter inner tube and the outer tube are telescopically connected, and the height of the sleeve can be adjusted by simply pulling up and pushing down. The utility model has a simple and reasonable structure and is convenient and quick to operate. It is not only convenient to adjust the height, but also applies force more evenly to the lower section of the parasol through the collet, which is not easy to damage the parasol, and the positioning is more stable, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of a sunshade umbrella according to an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model when the sleeve is in an extended state;

[0019] Figure 3 for Figure 2 A longitudinal cross-sectional view of

[0020] Figure 4 This is a schematic diagram of the structure of the embodiment of the utility model when the sleeve is in a contracted state;

[0021] Figure 5 for Figure 4 A longitudinal cross-sectional view of

[0022] Figure 6 An exploded view of an embodiment of the utility model;

[0023] Figure 7 for Figure 6 Longitudinal section view of . DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 7 As shown, a parasol base clamping mechanism includes a sleeve, a threaded joint 4, a collet 5 and a knob 3. The sleeve includes a variable diameter inner tube and an outer tube that can be telescopically connected. A threaded joint 21 is formed on the top of the variable diameter inner tube 2. The knob 3 can be movably sleeved on the threaded joint 21 and is rotatably connected to the threaded joint 21 through a thread. The collet 5 is a conical sleeve structure. The collet 5 is arranged in the knob 3. The upper end of the collet 5 is connected to the upper end of the knob 3. The lower end of the collet 5 is inserted into the through hole of the threaded joint 21. The lower inner wall of the perforation is a downwardly inclined tapered hole that cooperates with the collet 5. When the knob 3 is tightened clockwise and moved downward, the collet 5 moves downward accordingly, and the conical surface of the collet 5 is pressed against and squeezed by the conical hole of the threaded joint 21, and is retracted inward and clamped and locked with the lower section of the parasol inserted into the inner tube 2; an inner tube ring 4 is provided at the bottom of the variable diameter inner tube 2, and an outer tube ring 7 is provided at the top of the outer tube 1. The lower end of the variable diameter inner tube 2 can be movably sleeved in the outer tube 1 up and down, and can be telescopically positioned with the outer tube 1 through the inner tube ring 4 and the outer tube ring 7.

[0026] The specific structure is as follows: a circle of positioning grooves 22 are recessed on the outer wall of the lower end of the variable diameter inner tube 2, four longitudinal grooves 23 are evenly spaced at the lower end of the variable diameter inner tube 2, buckles 41 cooperating with the positioning grooves 22 are convexly provided at annular intervals in the middle of the inner wall of the inner tube collar 4, and positioning bosses 42 cooperating with the longitudinal grooves 23 are circumferentially spaced at the lower part of the inner wall of the inner tube collar 4, the buckles 41 and the positioning bosses 42 on the inner wall of the inner tube collar 4 are arranged cross-spaced at intervals, the inner tube collar 4 is sleeved on the lower end of the variable diameter inner tube 2, and is positioned and connected to the variable diameter inner tube 2 through the cooperation of the buckle 41 and the positioning grooves 22, and the positioning bosses 42 and the longitudinal grooves 23, so that the inner tube collar 4 cannot rotate or move up and down, and the installation is stable and reliable.

[0027] The upper end of the outer tube sleeve 7 is folded to form a convex edge that abuts against the upper end surface of the outer tube 1. Four longitudinal slots 71 are evenly spaced in the circumferential direction on the upper inner wall of the outer tube sleeve 7. A corresponding positioning convex rib 11 is formed on the inner wall of the upper end of the outer tube 1. An annular groove 13 for the lower end of the outer tube sleeve 7 to be inserted is formed on the inner wall of the outer tube 1 and below the positioning convex rib 11. The outer tube sleeve 7 is inserted into the outer tube 1 and positioned with the outer tube 1 through the cooperation of the longitudinal slot 71 and the positioning convex rib 11. A guide rib 12 corresponding to the positioning convex rib 11 is convexly provided on the inner wall of the outer tube 1 and below the positioning convex rib 11. Straight grooves 43 that cooperate with the positioning convex rib 11 and the guide rib 12 in the outer tube 1 are concavely provided on the outer wall of the inner tube sleeve 4 at intervals in the longitudinal direction. The variable diameter inner tube 2 moves up and down along the inner wall of the outer tube 1 through the cooperation of the straight grooves 43 of the inner tube sleeve 4 and the guide rib 12 on the inner wall of the outer tube 1.

[0028] The outer wall of the inner tube collar 4 is provided with outward fins 44 that abut against the inner wall of the outer tube 1 at uniform intervals in the annular direction. The outward fins 44 and the straight grooves 43 are arranged at intervals and cross-arranged. The lower part of the inner wall of the outer tube collar 7 is formed with a convex ring 72 that abuts against the outer wall of the variable diameter inner tube 2. The friction between the outward fins 44 and the inner wall of the outer tube 1 and the convex ring 72 and the outer wall of the variable diameter inner tube 2 realizes the positioning of the variable diameter inner tube 2 and the outer tube 1 at any height. The lower end of the outer tube collar 7 is provided with strip grooves 73 that penetrate the convex ring 72 at intervals in the annular direction, so that the lower end of the outer tube collar 7 has a certain elastic deformation, which is convenient for installation.

[0029] The upper part of the threaded joint 21 is an expanded external thread section, the lower part of the threaded joint 21 is a tapered transition section, the knob 3 is a hollow sleeve structure, the inner wall of the knob 3 has an internal thread that matches the threaded joint 21, and the height of the internal thread of the knob 3 is greater than the height of the external thread section of the threaded joint 21. The collet 5 is preferably made of metal sheet, but can also be made of plastic, and includes a plurality of V-shaped or U-shaped clips 51 arranged in an annular direction, which are connected in sequence to form a tapered jacket with a cylindrical inner wall and a tapered outer wall, and a connecting piece 52 is protruding upward from the middle of each V-shaped or U-shaped clip 51, and the upper end of the connecting piece 52 extends out of the tapered jacket and folds outward to form an L-shaped buckle 53. An annular step 31 is formed on the upper end of the inner wall of the knob 3, and a snap ring 6 is provided in the annular step 31, and the snap ring 6 has a snap hole 61 that cooperates with the L-shaped snap ring 53. The upper end of the collet 5 is fixed to the knob 3 through the cooperation of the L-shaped snap ring 53 and the snap hole 61 of the snap ring 6, and the upper end of the tapered jacket can abut against the lower end surface of the annular step 31. In this embodiment, there are 8 V-shaped or U-shaped clips 51, and 6 to 8 corresponding connecting pieces. The collet 5 is made into an integral part, and the inner diameter of the collet 5 is adapted to the lower diameter of the threaded joint 21, that is, the inner diameter of the collet 5 is the same size or slightly smaller. When the knob 3 is rotated counterclockwise and moved upward, the lower end of the collet 3 is located in the lower tapered hole of the threaded joint 21.

[0030] When in use, the lower section of the parasol is passed through the collet 5 and inserted into the inner tube 2 of the umbrella base 1, and the knob 3 is rotated clockwise. Under the cooperation of the inner thread of the knob 3 and the threaded joint 21, the knob 3 moves downward, driving the collet 5 to move downward, and the V-shaped or U-shaped clip 51 of the collet 5 undergoes elastic deformation and retracts inward under the restriction of the inner wall of the tapered hole of the threaded joint 21, so that the tapered jacket of the collet 5 is clamped with the lower section of the parasol, completing the locking function. In the locked state, the L-shaped buckle 53 at the top of the collet 5 maintains the maximum outer diameter unchanged under the restriction of the clamp 6, and the tapered bottom connecting the L-shaped buckle 53 and the bottom of the collet 5 undergoes elastic deformation at this time.

[0031] When the parasol needs to be loosened, the knob 3 is turned counterclockwise, and the knob 3 moves upward, driving the collet 5 to move upward, and the V-shaped or U-shaped clip 51 of the collet 5 is reset under the action of elasticity, driving the conical jacket to return to its original state, and the collet 5 is loosened from the lower section of the parasol.

[0032] When the height of the sleeve needs to be adjusted, it is only necessary to directly pull the variable diameter inner tube 2 up and down. The boss 72 in the outer tube collar 7 rubs against the outer wall of the variable diameter inner tube 2, and the outward fins 44 on the inner tube collar 4 rub against the inner wall of the outer tube 1. The two friction forces make the variable diameter inner tube 2 hover at any relative height of the outer tube 1.

[0033] The entire operation of this embodiment only needs to rotate the knob 3 to complete, and no screws or other fixing parts are required. The operation is very convenient, and the force on the lower section of the parasol is more uniform through the collet 5, which is not easy to damage the parasol, and the positioning is stable and reliable.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A parasol seat sleeve clamping mechanism, characterized in that: The umbrella seat sleeve clamping mechanism comprises a sleeve, a collet and a knob, wherein the sleeve comprises a retractable inner tube and an outer tube, the top of the retractable inner tube is formed with a threaded joint, the knob is movably sleeved on the threaded joint and is connected to the threaded joint by threaded rotation, the collet is a conical sleeve structure, the collet is arranged in the knob, the upper end of the collet is connected to the upper end of the knob, the lower end of the collet is inserted into the through hole of the threaded joint, the inner wall of the through hole has a downwardly inclined conical hole matched with the collet, when the knob is tightened clockwise and moved downward, the collet moves downward accordingly, the conical surface of the collet is pressed against the conical hole of the threaded joint, and is compressed and gathered inwardly to clamp and lock the lower section of the parasol inserted into the retractable inner tube; an inner tube collar is provided at the bottom of the retractable inner tube, and an outer tube collar is provided at the top of the outer tube, the lower end of the retractable inner tube is movably sleeved in the outer tube, and is telescopically positioned with the outer tube through the inner tube collar and the outer tube collar.

2. The umbrella seat sleeve clamping mechanism according to claim 1, characterized in that: A circle of positioning grooves is recessed on the outer wall of the lower end of the variable diameter inner tube, a plurality of longitudinal grooves are spaced apart at the lower end of the variable diameter inner tube, buckles matching the positioning grooves are convexly provided at annular intervals in the middle of the inner wall of the inner tube sleeve, and positioning bosses matching the longitudinal grooves are spaced apart at annular intervals in the lower part of the inner wall of the inner tube sleeve. The inner tube sleeve is sleeved on the lower end of the variable diameter inner tube, and is positioned and connected to the variable diameter inner tube through the cooperation of the buckles and the positioning grooves, and the positioning bosses and the longitudinal grooves.

3. The umbrella seat sleeve clamping mechanism according to claim 2, characterized in that: The upper end of the outer tube sleeve is folded to form a convex edge that abuts against the upper end surface of the outer tube, and the upper part of the inner wall of the outer tube sleeve is circumferentially spaced with a plurality of longitudinal slots, and the inner wall of the upper end of the outer tube is formed with corresponding positioning convex ribs, and the inner wall of the outer tube and below the positioning convex ribs are formed with an annular groove for the lower end of the outer tube sleeve to be inserted, and the outer tube sleeve is inserted into the outer tube and positioned with the outer tube through the cooperation of the longitudinal slots and the positioning convex ribs.

4. The umbrella seat sleeve clamping mechanism according to claim 3, characterized in that: Guide ribs corresponding to the positioning ribs are convexly provided on the inner wall of the outer tube and below the positioning ribs, and straight grooves cooperating with the positioning ribs and guide ribs in the outer tube are concavely provided at longitudinal intervals on the outer wall of the inner tube collar, and the variable diameter inner tube moves up and down along the inner wall of the outer tube through the straight grooves of the inner tube collar and the guide ribs on the inner wall of the outer tube.

5. The umbrella seat sleeve clamping mechanism according to claim 4, characterized in that: The outer wall of the inner tube sleeve is provided with outward fins at intervals in annular direction and abut against the inner wall of the outer tube. The lower part of the inner wall of the outer tube sleeve is formed with a convex ring which abuts against the outer wall of the variable diameter inner tube. The variable diameter inner tube and the outer tube are positioned at any height by the friction between the outward fins and the inner wall of the outer tube and the convex ring and the outer wall of the variable diameter inner tube.

6. The umbrella seat sleeve clamping mechanism according to claim 5, characterized in that: The lower end of the outer tube sleeve is circumferentially spaced with strip grooves that penetrate the convex ring, and the buckle, outward fin, positioning boss, straight groove, longitudinal slot, positioning rib and guide rib are four evenly arranged, among which the buckle and the positioning boss are arranged at intervals and crosses, and the outward fin and the straight groove are arranged at intervals and crosses.

7. The umbrella seat sleeve clamping mechanism according to any one of claims 1 to 6, characterized in that: The upper part of the threaded joint is an expanded external thread section, the lower part of the threaded joint is a tapered transition section, the knob is a hollow sleeve structure, the inner wall of the knob has an internal thread that matches the threaded joint, and the height of the internal thread of the knob is greater than the height of the external thread section of the threaded joint.

8. The umbrella seat sleeve clamping mechanism according to claim 1, characterized in that: The collet is made of metal sheets, and includes a plurality of circumferentially arranged V- or U-shaped clips, which are connected in sequence to form a tapered collet sleeve with a cylindrical inner wall and a tapered outer wall. A connecting piece is protruding upward from the middle of each V- or U-shaped clip, and the upper end of the connecting piece extends out of the tapered collet sleeve and is folded outward to form an L-shaped buckle. An annular step is formed on the upper end of the inner wall of the knob, and a snap ring is provided in the annular step. The snap ring has a snap hole that cooperates with the L-shaped snap ring. The upper end of the collet is fixed to the knob through the cooperation of the L-shaped snap ring and the snap hole of the snap ring, and the upper end of the tapered collet sleeve can abut against the lower end surface of the annular step.

9. The umbrella seat sleeve clamping mechanism according to claim 8, characterized in that: The number of the V-shaped or U-shaped clips is 6 to 10, and the number of the connecting pieces is correspondingly 6 to 10.

10. The umbrella seat sleeve clamping mechanism according to claim 9, characterized in that: The collet is an integral piece, and the inner diameter of the collet is adapted to the lower inner diameter of the threaded joint. When the knob is rotated counterclockwise and moved upward to a position, the lower end of the collet is located in the lower conical hole of the threaded joint.

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