Foot stool convenient to unfold and fold

Abstract

The invention relates to the technical field of foot stools, in particular to a foot stool convenient to unfold and fold, which comprises an outer barrel body and a supporting leg which is hinged with the outer barrel body and can rotate along a hinge shaft, and further comprises an inner barrel body, a power spring, a limiting and locking mechanism and an unlocking mechanism, the unfolding limiting groove comprises a first-gear unfolding groove and a second-gear unfolding groove, the first-gear unfolding groove and the second-gear unfolding groove are formed in the axial direction of the outer barrel body at intervals, the inner barrel body is movably arranged in the outer barrel body and can move in the axial direction of the outer barrel body, and the limiting locking mechanism is connected with the inner barrel body and can be matched with the folding limiting groove or the unfolding limiting groove. The unlocking mechanism is connected with the limiting and locking mechanism, the two ends of the power spring abut against the outer barrel and the inner barrel respectively so as to drive the inner barrel to move after the limiting and locking mechanism retreats from the folding limiting groove or the unfolding limiting groove, a rack is arranged on the inner barrel, and a gear meshed with the rack is arranged on the supporting foot. The device is easy to operate and convenient to unfold and fold.

Description

Technical Field

[0001] The invention relates to the technical field of tripods, in particular to a tripod which can be easily unfolded and folded. Background Art

[0002] A tripod is a commonly used auxiliary device in photography and videography, used to stabilize a camera or video camera to obtain clear, shake-free images. A tripod generally includes several legs, which are respectively hinged to a mounting tube, so that the legs can be rotated relative to the mounting tube to expand and fold, making it convenient for users to carry and use. However, when expanding the tripod, the user needs to expand each leg separately, and when folding the tripod, each leg also needs to be folded separately. Each expansion and folding operation is cumbersome and time-consuming. Summary of the invention

[0003] The purpose of the present invention is to provide a tripod that can be easily unfolded and folded, so as to solve the problem that the existing tripod has complicated operation caused by the need to unfold or fold each supporting leg separately in turn when in use.

[0004] To solve the above problems, the present invention provides the following technical solutions: The tripod can be easily unfolded and folded, comprising an outer cylinder and a support leg hinged to the outer cylinder and rotatable along a hinge axis, and also comprising an inner cylinder, a power spring, a limit locking mechanism and an unlocking mechanism. The outer cylinder is provided with a folding limit groove and an unfolding limit groove, and the unfolding limit groove comprises a first-gear unfolding groove and a second-gear unfolding groove, and the first-gear unfolding groove and the second-gear unfolding groove are arranged at intervals along the axial direction of the outer cylinder. The inner cylinder is movably arranged in the outer cylinder and can move along the axial direction of the outer cylinder. The limit locking mechanism is connected to the inner cylinder and can be engaged with the folding limit groove or The expansion limit groove cooperates to limit the movement of the inner cylinder, and the unlocking mechanism is connected with the limit locking mechanism to drive the limit locking mechanism to exit the folding limit groove or the expansion limit groove. The two ends of the power spring respectively abut the outer cylinder and the inner cylinder to drive the inner cylinder to move after the limit locking mechanism exits the folding limit groove or the expansion limit groove. A rack is provided on the inner cylinder, and a gear meshing with the rack is provided on the support leg. When the inner cylinder moves, the support leg is driven to rotate to expand or fold the support leg.

[0005] As described above, the tripod that can be easily unfolded and folded, the limit locking mechanism includes a limit block and a limit spring, the unlocking mechanism includes an unlocking cam, the unlocking cam is arranged in the inner cylinder, the limit block is hinged to the inner cylinder, the limit block is provided with a limit end and a hinge end, the hinge end extends along the radial direction of the inner cylinder and abuts against the unlocking cam, the limit end extends along the circumferential direction of the inner cylinder, and the two ends of the limit spring abut against the limit end and the inner cylinder respectively.

[0006] As described above, the tripod that can be easily unfolded and folded, the unlocking mechanism also includes a transmission rod for driving the unlocking cam to rotate, and the unlocking cam is movably arranged on the transmission rod and can move along the axial direction of the transmission rod.

[0007] As described above, the tripod that can be easily unfolded and folded, the unlocking mechanism also includes a button, a transmission seat and a fixed seat, the button is movably arranged at one end of the outer cylinder and can move along the axial direction of the outer cylinder, one end of the transmission seat is coaxially abutted with the button, and the other end is coaxially fixedly connected with the transmission rod, the fixed seat is sleeved with the transmission seat, and the fixed seat is fixedly connected to the outer cylinder, the fixed seat is provided with a transmission limit pin, the transmission seat is provided with a transmission limit groove that cooperates with the transmission limit pin, and the transmission limit groove is spiral.

[0008] As described above, in the conveniently unfoldable and foldable tripod, the unlocking mechanism further comprises a return spring, and two ends of the return spring respectively abut against the transmission seat and the fixing seat.

[0009] As described above, in the conveniently unfolded and folded tripod, the button comprises a button shaft and a button head arranged at one end of the button shaft, the button shaft is sleeved with the fixing seat, the fixing seat is provided with a switch limit pin, the button shaft is provided with a switch limit groove cooperating with the switch limit pin, and the switch limit groove extends along the axial direction of the button shaft.

[0010] As described above, the tripod that can be easily unfolded and folded, the fixing seat includes a sleeve portion and an end plate arranged at one end of the sleeve portion, the end plate is fixedly connected to the outer cylinder, a limit baffle is provided on the inner cylinder, the power spring is sleeved outside the sleeve portion, and the two ends of the power spring respectively abut the end plate and the limit baffle.

[0011] The conveniently unfoldable and foldable tripod as described above also includes a safety mechanism, which includes a safety end cover, which is arranged at one end of the outer cylinder and can rotate relative to the outer cylinder, and the safety end cover is provided with a button clearance hole and a safety groove connected to the button clearance hole, and the button is provided with a button positioning pin corresponding to the safety groove.

[0012] As described above, in the conveniently unfolded and foldable tripod, the safety mechanism includes a locking bolt, and the safety end cover is provided with an arc-shaped hole. The locking bolt passes through the arc-shaped hole to connect the safety end cover and the outer cylinder. When the safety end cover is rotated until the safety groove is opposite to the button positioning pin, the locking bolt is located at one end of the arc-shaped hole.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The tripod provided by the present invention can be easily deployed and folded. When the supporting leg needs to be deployed, the limit locking mechanism is driven by the unlocking mechanism to exit the folding limit groove. At this time, the inner cylinder moves under the drive of the power spring, and the supporting leg rotates and deploys accordingly under the cooperation of the gear and the rack. When the inner cylinder moves to the point where the limit locking mechanism cooperates with the deployment limit groove, the inner cylinder stops moving and the supporting leg remains in the deployed state; when the supporting leg needs to be folded, the limit locking mechanism is driven by the unlocking mechanism to exit the deployment limit groove. At this time, the supporting leg is rotated with force, and the inner cylinder moves accordingly under the cooperation of the gear and the rack, the power spring is compressed and stored, and when the inner cylinder moves to the point where the limit locking mechanism cooperates with the folding limit groove, the inner cylinder stops moving and the supporting leg remains in the folded state. The conveniently deployable and foldable tripod of the present invention can automatically deploy all the legs by driving an unlocking mechanism when deploying the legs, and can automatically fold all the legs by forcefully rotating one of the legs when folding the legs, without the need to deploy or fold each leg individually. The operation is simple, and deployment and folding are convenient, which is beneficial to improving the user experience.

[0014] 2. The tripod provided by the present invention can be easily unfolded and folded. Since the unfolding limit slot includes a first-level unfolding slot and a second-level unfolding slot, when the limit locking mechanism cooperates with the first-level unfolding slot, the leg maintains the first-level unfolding state, and when the limit locking mechanism cooperates with the second-level unfolding slot, the leg maintains the second-level unfolding state. Users can unfold the leg to different gears according to their needs to meet the user's usage requirements in different scenarios.

[0015] 3. The tripod provided by the present invention can be easily unfolded and folded. When in use, the button can be pressed manually or by holding the tripod so that the button is in contact with the ground. Pressing the button once can automatically unfold the legs to the first gear; pressing the button again can automatically unfold the legs to the second gear; pressing the button and manually turning the legs in the folding direction can fold the legs. The unfolding and folding are convenient, and the unfolding gear switching is efficient.

[0016] 4. The conveniently unfoldable and foldable tripod provided by the present invention has a safety mechanism, which can effectively prevent the legs from being unfolded due to misoperation. Before unfolding the legs, the safety limit of the button can be conveniently released by rotating the safety end cover. After folding the legs, the safety limit of the button can be conveniently restored by rotating the safety end cover. The operation is simple and the reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1It is a structural schematic diagram of the folded state of the legs of the conveniently unfolded and folded tripod according to an embodiment of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the first-stage unfolded state of the legs of the conveniently unfoldable and foldable tripod according to an embodiment of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the legs of a tripod that can be easily unfolded and folded in the second-gear unfolded state according to an embodiment of the present invention.

[0021] Figure 4 A cross-sectional view of a tripod that can be easily unfolded and folded according to an embodiment of the present invention.

[0022] Figure 5 This is a structural exploded view of a tripod that can be easily unfolded and folded according to an embodiment of the present invention.

[0023] Figure 6 It is a partial structural exploded view of the conveniently unfoldable and foldable tripod according to an embodiment of the present invention.

[0024] Figure 7 It is a schematic structural diagram of the inner cylinder of the tripod that can be easily unfolded and folded according to an embodiment of the present invention.

[0025] Figure 8 It is a schematic structural diagram of a safety end cover of a tripod that can be easily unfolded and folded according to an embodiment of the present invention.

[0026] The numbers corresponding to the reference numerals are as follows: 1. Outer cylinder; 11. Closing limit slot; 12. Expanding limit slot; 121. First gear expansion slot; 122. Second gear expansion slot; 2. Inner cylinder; 21. Rack; 22. Limit baffle; 23. Articulated clearance slot; 24. Spring limit slot; 25. Limit mounting plate; 3. Support foot; 31. Gear; 4. Power spring; 5. Limit locking mechanism; 51. Limit block; 511. Limit end; 512. Articulated end; 52. Limit spring; 6. Unlocking mechanism; 61. Unlocking cam; 62. Transmission rod; 63. Button; 6301. Button shaft; 6302, button head; 631, switch limit slot; 632, button positioning pin; 64, transmission seat; 6401, transmission connecting part; 6402, button connecting part; 641, transmission limit slot; 65, fixed seat; 6501, sleeve part; 6502, end plate; 651, transmission limit pin; 652, switch limit pin; 653, transmission limit plate; 66, reset spring; 7, insurance mechanism; 71, insurance end cover; 711, button clearance hole; 712, insurance slot; 713, arc hole; 72, locking bolt. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Please refer to the attached Figure 1 To Attachment Figure 8 The present embodiment provides a tripod that can be easily unfolded and folded, comprising an outer cylinder 1 and a support leg 3 hinged to the outer cylinder 1 and rotatable along a hinge axis, and also comprising an inner cylinder 2, a power spring 4, a limit locking mechanism 5 and an unlocking mechanism 6. The outer cylinder 1 is provided with a folding limit groove 11 and an unfolding limit groove 12. The inner cylinder 2 is movably arranged in the outer cylinder 1 and can move along the axial direction of the outer cylinder 1. The limit locking mechanism 5 is connected to the inner cylinder 2 and can cooperate with the folding limit groove 11 or the unfolding limit groove 12 to limit the movement of the inner cylinder 2. The unlocking mechanism 6 The locking mechanism 6 is connected to the limit locking mechanism 5, and is used to drive the limit locking mechanism 5 to withdraw from the folding limit groove 11 or the unfolding limit groove 12. The two ends of the power spring 4 respectively abut the outer cylinder 1 and the inner cylinder 2 to drive the inner cylinder 2 to move after the limit locking mechanism 5 withdraws from the folding limit groove 11 or the unfolding limit groove 12. A rack 21 is provided on the inner cylinder 2, and a gear 31 meshing with the rack 21 is provided on the support leg 3. When the inner cylinder 2 moves, it drives the support leg 3 to rotate to unfold or fold the support leg 3. When it is necessary to unfold the support leg 3, the limit locking mechanism 5 is driven by the unlocking mechanism 6 to exit the folding limit groove 11. At this time, the inner cylinder 2 moves under the drive of the power spring 4, and the support leg 3 rotates and unfolds with the cooperation of the gear 31 and the rack 21. When the inner cylinder 2 moves to the limit locking mechanism 5 and cooperates with the expansion limit groove 12, the inner cylinder 2 stops moving and the support leg 3 remains in the expanded state; when it is necessary to fold the support leg 3, the limit locking mechanism 5 is driven by the unlocking mechanism 6 to exit the expansion limit groove 12. At this time, the support leg 3 is rotated forcefully, and the inner cylinder 2 moves with the cooperation of the gear 31 and the rack 21. The power spring 4 is compressed and stored. When the inner cylinder 2 moves to the limit locking mechanism 5 and cooperates with the folding limit groove 11, the inner cylinder 2 stops moving and the support leg 3 remains in the folded state. In this embodiment, when the legs 3 are unfolded, all the legs 3 can be automatically unfolded by driving the unlocking mechanism 6. When the legs 3 are folded, all the legs 3 can be automatically folded by forcefully rotating one of the legs 3. There is no need to unfold or fold each leg 3 separately. The operation is simple, and the unfolding and folding are convenient, which is conducive to improving the user experience.

[0029] In this embodiment, the expansion limit groove 12 includes a first-gear expansion groove 121 and a second-gear expansion groove 122, and the first-gear expansion groove 121 and the second-gear expansion groove 122 are arranged at intervals along the axial direction of the outer cylinder 1. Since the expansion limit groove 12 includes the first-gear expansion groove 121 and the second-gear expansion groove 122, when the limit locking mechanism 5 cooperates with the first-gear expansion groove 121, the support leg 3 maintains the first-gear expansion state, and when the limit locking mechanism 5 cooperates with the second-gear expansion groove 122, the support leg maintains the second-gear expansion state. The user can expand the support leg to different gears according to his own needs to meet the user's use needs in different scenarios. Of course, the number of expansion limit grooves 12 can be specifically set according to user needs, and is not limited to two expansion gears.

[0030] Among them, the limit locking mechanism 5 and the unlocking mechanism 6 can be implemented through various implementations. In some embodiments, the limit locking mechanism 5 can include two parallel and opposite limit racks, and the unlocking mechanism 6 can be a limit gear disposed between the two limit racks. When the limit gear is rotated forward, the two limit racks move in opposite directions and move away from each other, thereby cooperating with the folding limit slot 11 or the unfolding limit slot 12. When the limit gear is rotated backward, the two limit racks move in opposite directions and move closer to each other, thereby exiting the folding limit slot 11 or the unfolding limit slot 12. This implementation is simple and has low implementation cost.

[0031] In this embodiment, the limit locking mechanism 5 includes a limit block 51 and a limit spring 52, and the unlocking mechanism 6 includes an unlocking cam 61. The unlocking cam 61 is arranged in the inner cylinder 2. The limit block 51 is hinged to the inner cylinder 2. The limit block 51 is provided with a limit end 511 and a hinge end 512. The hinge end 512 extends along the radial direction of the inner cylinder 2 and abuts against the unlocking cam 61. The limit end 511 extends along the circumferential direction of the inner cylinder 2. The two ends of the limit spring 52 abut against the limit end 511 and the inner cylinder 2 respectively. Among them, the unlocking cam 61 is provided with an arc flange, and the hinge end 512 is provided with an inclined surface matched with the arc flange. The inner cylinder 2 is provided with a hinged clearance groove 23 matched with the limit block 51 and a spring limit groove 24 matched with the limit spring 52, and the spring limit groove 24 is connected with the hinged clearance groove 22. The limit block 51 is installed on the hinged clearance groove 23 on the inner cylinder 2, with a compact structure and small space occupation. The limit spring 52 is installed on the spring limit groove 24, and the limit spring 52 can be received in the spring limit groove 24 when compressed, and the structural reliability is high. Before unlocking, the limit end 511 of the limit block 51 cooperates with the folding limit groove 11 or the unfolding limit groove 12 under the elastic force of the limit spring 52; when unlocking is required, the unlocking cam 61 is rotated, and the limit block 51 rotates under the force of the unlocking cam 61. At this time, the limit end 511 of the limit block 51 withdraws from the folding limit groove 11 or the unfolding limit groove 12, and compresses the limit spring 52, and the limit spring 52 accumulates force to prepare for the next locking. In this embodiment, the limit block 51 realizes the automatic limit cooperation with the folding limit groove 11 or the unfolding limit groove 12 through the elastic action of the limit spring 52, and the quick unlocking can be achieved by the simple operation of rotating the unlocking cam 61.

[0032] Furthermore, the unlocking mechanism 6 of the present embodiment further comprises a transmission rod 62 for driving the unlocking cam 61 to rotate, and the unlocking cam 61 is movably arranged on the transmission rod 62 and can move along the axial direction of the transmission rod 62. Among them, a positioning groove is arranged on the transmission rod 62, and a protrusion matching with the positioning groove is arranged on the unlocking cam 61, so that the unlocking cam 61 cannot rotate relative to the transmission rod 62, and a limiting mounting plate 25 is arranged on the inner cylinder 2, and the limiting mounting plate 25 is located on one side of the unlocking cam 61, and the limiting mounting plate 25 is fixedly connected to the inner cylinder 2 to limit the unlocking cam 61 from moving relative to the inner cylinder 2, and when the inner cylinder 2 moves, the unlocking cam 61 moves accordingly, and when the transmission rod 62 rotates, the unlocking cam 61 rotates accordingly.

[0033] Of course, the rotation of the transmission rod 62 can be achieved through various implementations. In some embodiments, the transmission rod 62 can be rotated manually. In some embodiments, the transmission rod 62 can also be driven to rotate by a motor or the like.

[0034] In this embodiment, the unlocking mechanism 6 further includes a button 63, a transmission seat 64 and a fixed seat 65. The button 63 is movably arranged at one end of the outer cylinder 1 and can move along the axial direction of the outer cylinder 1. One end of the transmission seat 64 is coaxially abutted with the button 63, and the other end is coaxially fixedly connected with the transmission rod 62. The fixed seat 65 is sleeved with the transmission seat 64, and the fixed seat 65 is fixedly connected with the outer cylinder 1. A transmission limit pin 651 is provided on the fixed seat 65, and a transmission limit groove 641 matched with the transmission limit pin 651 is provided on the transmission seat 64, and the transmission limit groove 641 is spiral. Preferably, two transmission limit pins 651 are provided in this embodiment, and the two transmission limit pins 651 are respectively arranged on opposite sides of the fixed seat 65, and two transmission limit grooves 641 are correspondingly provided, so that the transmission is more stable and smooth. When the button 63 is pressed, the transmission seat 64 and the transmission rod 62 move along the axial direction of the outer cylinder 1 with the button 63. At the same time, the transmission seat 64 drives the transmission rod 62 to rotate under the cooperation of the transmission limit pin 651 and the transmission limit groove 641, thereby driving the unlocking cam 61 to rotate synchronously. At this time, the limit block 51 rotates under the driving force of the unlocking cam 61, and the limit end 511 of the limit block 51 withdraws from the retracted limit groove 11 or the expanded limit groove 12, and compresses the limit spring 52 to achieve unlocking.

[0035] Furthermore, in order to further improve the automation level of this embodiment, so that the button 63, the transmission seat 64 and the fixed seat 65 can be automatically reset, the unlocking mechanism 6 of this embodiment further includes a reset spring 66, and the two ends of the reset spring 66 respectively abut the transmission seat 64 and the fixed seat 65. The transmission seat 64 of this embodiment includes a transmission connection part 6401 and a button connection part 6402, the transmission connection part 6401 is fixedly connected to the transmission rod 62, the button connection part 6402 abuts against the button 63, the diameter of the button connection part 6402 is larger than the diameter of the transmission connection part 6401, the transmission limit groove 641 is provided on the button connection part 6402, the end of the fixed seat 65 away from the button 63 is provided with a transmission limit plate 653, the reset spring 66 is sleeved outside the transmission connection part 6401, and the two ends of the reset spring 66 abut against the button connection part 6402 and the transmission limit plate 653 respectively. When the button 63 is pressed, the transmission seat 64 and the transmission rod 62 move axially along the outer cylinder 1 with the button 63, and at the same time, the transmission seat 64 drives the transmission rod 62 to rotate under the cooperation of the transmission limit pin 651 and the transmission limit groove 641. At this time, the reset spring 66 is compressed and stores force. When the pressing external force acting on the button 63 is removed, the transmission seat 64 drives the button 63 and the transmission rod 62 to move axially along the outer cylinder 1 under the driving of the elastic force of the reset spring 66. At the same time, the transmission seat 64 drives the transmission rod 62 to rotate under the cooperation of the transmission limit pin 651 and the transmission limit groove 641, thereby realizing automatic reset of the button 63, the transmission seat 64 and the fixed seat 65, which is more convenient to use.

[0036] Furthermore, the button 63 includes a button shaft 6301 and a button head 6302 disposed at one end of the button shaft 6301, the button shaft 6301 is sleeved with the fixing seat 65, the fixing seat 65 is provided with a switch limit pin 652, the button shaft 6301 is provided with a switch limit slot 631 matched with the switch limit pin 652, and the switch limit slot 631 extends along the axial direction of the button shaft 6301. The switch limit slot 631 is used to effectively limit the movement stroke and movement direction of the button 63, so that pressing the button 63 once can drive the transmission rod 62 to drive the unlocking cam 61 to rotate to the limit end 511 of the limit block 51 to exit the folding limit slot 11 or the unfolding limit slot 12, and effectively prevent the button 63 from shaking during the movement.

[0037] Furthermore, the fixing seat 65 of this embodiment includes a sleeve portion 6501 and an end plate 6502 provided at one end of the sleeve portion 6501, the end plate 6502 is fixedly connected to the outer cylinder 1, a limit baffle 22 is provided on the inner cylinder 2, the power spring 4 is sleeved outside the sleeve portion 6501, and the two ends of the power spring 4 respectively abut against the end plate 6502 and the limit baffle 22. The installation structure of the power spring 4 of this embodiment is compact and stable, and is easy to install.

[0038] Furthermore, the conveniently unfolded and folded tripod of the present embodiment also includes a safety mechanism 7, which includes a safety end cover 71. The safety end cover 71 is arranged at one end of the outer cylinder 1 and can rotate relative to the outer cylinder 1. The safety end cover 71 is provided with a button clearance hole 711 and a safety groove 712 connected to the button clearance hole 711, and the button 63 is provided with a button positioning pin 632 corresponding to the safety groove 712. When the insurance end cover 71 is rotated to rotate the insurance slot 712 and the button positioning pin 632, the button 63 is pressed, and the button positioning pin 632 on the button 63 can pass through the insurance slot 712, so that the button 63 can move normally along the axial direction of the outer cylinder 1 to drive unlocking; when the insurance end cover 71 is rotated to rotate the insurance slot 712 and the button positioning pin 632 are not opposite to each other, the button 63 is pressed, and the button positioning pin 632 on the button 63 cannot pass through the insurance slot 712, so that the button 63 cannot move normally along the axial direction of the outer cylinder 1 to drive unlocking. By setting the insurance mechanism 7, it is effectively prevented that the user presses the button by mistake and unfolds the foot support, thereby improving the reliability of the overall structure.

[0039] Further, the safety mechanism 7 includes a locking bolt 72, and an arc hole 713 is provided on the safety end cover 71. The locking bolt 72 passes through the arc hole 713 to connect the safety end cover 71 and the outer cylinder 1. When the safety end cover 71 is rotated to the point where the safety groove 712 is opposite to the button positioning pin 632, the locking bolt 72 is located at one end of the arc hole 713. When the safety end cover 71 is rotated to make the locking bolt 72 located at one end of the arc hole 713, the safety groove 712 is opposite to the button positioning pin 632, and the button positioning pin 632 on the button 63 can pass through the safety groove 712, so that the button 63 can move normally along the axial direction of the outer cylinder 1 to drive unlocking. Through the cooperation of the locking bolt 72 and the arc hole 713, a positioning prompt can be provided to the user, and there is no need to rotate the safety end cover 71 while checking whether it is rotated to the position where the safety groove 712 is opposite to the button positioning pin 632, which is more convenient to use.

[0040] When it is necessary to deploy the support leg 3 in the first gear, the safety end cover 71 is rotated to make the safety groove 712 opposite to the button positioning pin 632, and the button 63 is pressed to make the transmission seat 64 and the transmission rod 62 move axially along the outer cylinder 1 with the button 63. At the same time, the transmission seat 64 drives the transmission rod 62 to rotate under the cooperation of the transmission limit pin 651 and the transmission limit groove 641, thereby driving the unlocking cam 61 to rotate synchronously. At this time, the limit block 51 rotates under the driving force of the unlocking cam 61, and the limit end 511 of the limit block 51 withdraws from the retracted limit groove 11 and compresses the limit spring 52 to achieve unlocking. The inner cylinder 2 moves under the drive of the power spring 4, and the support leg 3 rotates and deploys accordingly under the cooperation of the gear 31 and the rack 21. When the inner cylinder 2 moves to the limit locking mechanism 5 and cooperates with the first gear deployment groove 121, the inner cylinder 2 stops moving and the support leg 3 maintains the first gear deployment state.

[0041] When the second gear deployment support leg 3 is required, the button 63 is pressed again to make the transmission seat 64 and the transmission rod 62 move axially along the outer cylinder 1 with the button 63. At the same time, the transmission seat 64 drives the transmission rod 62 to rotate under the cooperation of the transmission limit pin 651 and the transmission limit groove 641, thereby driving the unlocking cam 61 to rotate synchronously. At this time, the limit block 51 rotates under the driving force of the unlocking cam 61, and the limit end 511 of the limit block 51 withdraws from the first gear deployment groove 121 and compresses the limit spring 52 to achieve unlocking. The inner cylinder 2 continues to move under the drive of the power spring 4, and the support leg 3 rotates and deploys accordingly under the cooperation of the gear 31 and the rack 21. When the inner cylinder 2 moves to the point where the limit locking mechanism 5 cooperates with the second gear deployment groove 122, the inner cylinder 2 stops moving and the support leg 3 remains in the second gear deployment state.

[0042] When it is necessary to fold the support leg 3, the button 63 is continuously pressed to make the transmission seat 64 and the transmission rod 62 move along the axial direction of the outer cylinder 1 with the button 63. At the same time, the transmission seat 64 drives the transmission rod 62 to rotate under the cooperation of the transmission limit pin 651 and the transmission limit groove 641, thereby driving the unlocking cam 61 to rotate synchronously. At this time, the limit block 51 rotates under the driving force of the unlocking cam 61, and the limit end 511 of the limit block 51 withdraws from the first gear expansion groove 121 or the second gear expansion groove 122, and compresses the limit spring 52 to achieve unlocking. Subsequently, the support leg 3 is rotated with force, and the inner cylinder 2 moves accordingly under the cooperation of the gear 31 and the rack 21, and the power spring 4 is compressed and stored. When the inner cylinder 2 moves to the limit locking mechanism 5 and cooperates with the folding limit groove 11, the inner cylinder 2 stops moving and the support leg 3 remains in the folded state.

[0043] The tripod of the present embodiment can be easily deployed and folded, and the legs 3 can be automatically deployed in the first gear by manually pressing the button 63 or by holding the tripod so that the button 63 contacts the ground. By pressing the button 63 once, the legs 3 can be automatically deployed in the second gear; by pressing the button 63 again, the legs 3 can be automatically deployed in the second gear; by pressing the button 63 and manually rotating the legs 3 in the folding direction, the legs 3 can be folded. Deployment and folding are convenient, and the deployment gear switching is efficient.

[0044] The conveniently unfolded and folded tripod of the present embodiment has a safety mechanism 7, which can effectively prevent the support leg 3 from being unfolded due to misoperation. Before unfolding the support leg 3, the safety limit on the button 63 can be conveniently released by rotating the safety end cover 71. After folding the support leg 3, the safety limit on the button 63 can be conveniently restored by rotating the safety end cover 71. The operation is simple and the reliability is high.

[0045] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A tripod that can be easily unfolded and folded, comprising an outer cylinder (1) and a support leg (3) hinged to the outer cylinder (1) and rotatable along a hinge axis, characterized in that: The invention also comprises an inner cylinder (2), a power spring (4), a limit locking mechanism (5) and an unlocking mechanism (6); the outer cylinder (1) is provided with a folding limit groove (11) and an unfolding limit groove (12); the unfolding limit groove (12) comprises a first-gear unfolding groove (121) and a second-gear unfolding groove (122); the first-gear unfolding groove (121) and the second-gear unfolding groove (122) are arranged at intervals along the axial direction of the outer cylinder (1); the inner cylinder (2) is movably arranged in the outer cylinder (1) and can move along the axial direction of the outer cylinder (1); the limit locking mechanism (5) is connected to the inner cylinder (2) and can cooperate with the folding limit groove (11) or the unfolding limit groove (12) to limit the inner cylinder (2) moves, the unlocking mechanism (6) is connected to the limit locking mechanism (5) and is used to drive the limit locking mechanism (5) to withdraw from the folding limit groove (11) or the unfolding limit groove (12), the two ends of the power spring (4) respectively abut the outer cylinder (1) and the inner cylinder (2) to drive the inner cylinder (2) to move after the limit locking mechanism (5) withdraws from the folding limit groove (11) or the unfolding limit groove (12), the inner cylinder (2) is provided with a rack (21), and the support leg (3) is provided with a gear (31) meshing with the rack (21), and when the inner cylinder (2) moves, the support leg (3) is driven to rotate to unfold or fold the support leg (3).

2. The conveniently unfoldable and foldable tripod according to claim 1, characterized in that: The limit locking mechanism (5) comprises a limit block (51) and a limit spring (52); the unlocking mechanism (6) comprises an unlocking cam (61); the unlocking cam (61) is arranged in the inner cylinder (2); the limit block (51) is hinged to the inner cylinder (2); the limit block (51) is provided with a limit end (511) and a hinge end (512); the hinge end (512) extends along the radial direction of the inner cylinder (2) and abuts against the unlocking cam (61); the limit end (511) extends along the circumferential direction of the inner cylinder (2); and two ends of the limit spring (52) abut against the limit end (511) and the inner cylinder (2), respectively.

3. The conveniently unfoldable and foldable tripod according to claim 2, characterized in that: The unlocking mechanism (6) further comprises a transmission rod (62) for driving the unlocking cam (61) to rotate; the unlocking cam (61) is movably disposed on the transmission rod (62) and is movable along the axial direction of the transmission rod (62).

4. The conveniently unfoldable and foldable tripod according to claim 3, characterized in that: The unlocking mechanism (6) further comprises a button (63), a transmission seat (64) and a fixed seat (65); the button (63) is movably arranged at one end of the outer cylinder (1) and can move along the axial direction of the outer cylinder (1); one end of the transmission seat (64) is coaxially abutted with the button (63), and the other end is coaxially fixedly connected with the transmission rod (62); the fixed seat (65) is sleeved with the transmission seat (64), and the fixed seat (65) is fixedly connected to the outer cylinder (1); a transmission limit pin (651) is provided on the fixed seat (65); and a transmission limit groove (641) matched with the transmission limit pin (651) is provided on the transmission seat (64); the transmission limit groove (641) is spiral.

5. The conveniently unfoldable and foldable tripod according to claim 4, characterized in that: The unlocking mechanism (6) further comprises a return spring (66), and two ends of the return spring (66) respectively abut against the transmission seat (64) and the fixing seat (65).

6. The conveniently unfoldable and foldable tripod according to claim 4, characterized in that: The button (63) comprises a button shaft (6301) and a button head (6302) arranged at one end of the button shaft (6301); the button shaft (6301) is sleeved with the fixing seat (65); a switch limit pin (652) is provided on the fixing seat (65); a switch limit groove (631) cooperating with the switch limit pin (652) is provided on the button shaft (6301); and the switch limit groove (631) extends along the axial direction of the button shaft (6301).

7. The conveniently unfoldable and foldable tripod according to claim 4, characterized in that: The fixing seat (65) comprises a sleeve portion (6501) and an end plate (6502) provided at one end of the sleeve portion (6501); the end plate (6502) is fixedly connected to the outer cylinder (1); a limit baffle (22) is provided on the inner cylinder (2); the power spring (4) is sleeved outside the sleeve portion (6501); and two ends of the power spring (4) respectively abut against the end plate (6502) and the limit baffle (22).

8. The conveniently unfoldable and foldable tripod according to any one of claims 4 to 7, characterized in that: The invention also comprises a safety mechanism (7), the safety mechanism (7) comprising a safety end cover (71), the safety end cover (71) being arranged at one end of the outer cylinder (1) and being rotatable relative to the outer cylinder (1), the safety end cover (71) being provided with a button clearance hole (711) and a safety groove (712) communicating with the button clearance hole (711), and the button (63) being provided with a button positioning pin (632) corresponding to the safety groove (712).

9. The conveniently deployable and foldable tripod according to claim 8, characterized in that: The safety mechanism (7) comprises a locking bolt (72). An arc-shaped hole (713) is provided on the safety end cover (71). The locking bolt (72) passes through the arc-shaped hole (713) to connect the safety end cover (71) and the outer cylinder (1). When the safety end cover (71) is rotated until the safety groove (712) is opposite to the button positioning pin (632), the locking bolt (72) is located at one end of the arc-shaped hole (713).

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