GB2602691A

GB2602691A - Extension adjustment device for fishing box or foot pipe

Info

Publication number: GB2602691A
Application number: GB2112118.1A
Authority: GB
Inventors: Yang Baoqing
Original assignee: Zhejiang Hengfeng Top Leisure Co Ltd
Current assignee: Zhejiang Hengfeng Top Leisure Co Ltd
Priority date: 2020-08-28
Filing date: 2021-08-24
Publication date: 2022-07-13
Anticipated expiration: 2041-08-24
Also published as: FR3113559B3; FR3113559A3; GB2602691B; GB202112118D0; DE202021104427U1

Abstract

An extension adjustment device for a fishing box or foot pipe (1) comprises a frame (2), a locking device (3) sleeved on an outer circumference of a foot pipe (1) and configured to lock the foot pipe, and an adjustment device (4) for adjusting the degree of locking between the locking device (3) and the foot pipe (1). The locking device (3) includes an annular locking block (8) with a protruding opening on a side. Upper and lower sides of the frame (2) and the locking block (8) are provided with first through holes (5) allowing the foot pipe (1) to pass through, and front and rear sides of the frame (2) and the protruding opening are provided with second through holes (6) allowing a connecting shaft (9) to pass through. Adjustment device (4) includes a wrench sleeved on the front and rear sides of the frame and connected with the connecting shaft. Rotation of the wrench adjusts the size of the protruding opening.

Description

Extension adjustment device for fishing box or foot pipe

FIELD

100011 The present disclosure relates to the technical field of extension adjustment for a foot pipe, and in particular to an extension adjustment device for a foot pipe. In addition, the present disclosure also relates to an extension adjustment device for a fishing box including the above extension adjustment for the foot pipe.

BACKGROUND

100021 In conventional technology, the conventional extension adjustment structure of a foot pipe 1 is composed of a frame 2, a base 01, a hand wheel 02, a pressing block 03, and a fastener 04. Referring to FIGS. 1 to 4, when performing the extension adjustment of the foot pipe 1, it is required to tighten or loosen the hand wheel 02, and the rotation of the hand wheel 02 can push the pressing block 03 to move, so that the pressing block 03 and the base 01 can be used to clamp or release the foot pipe 1, that is, when the hand wheel 02 is rotated in an A direction, a thread of the base 01 drives the hand wheel 02 to move in a C direction at the same time, and the pressing block 03 is pushed in the C direction at the same time, and the foot pipe 1 is clamped by E surface of the pressing block 03 and El and E2 surfaces of the base 01 to prevent the foot pipe 1 from moving in a B direction. However, as the hand wheel 02 is rotated, in order to ensure that the foot pipe 1 is locked, and great force is required by the operator to tighten the hand wheel 02, which is a time-consuming and laborious operation process.

100031 In summary, a technical issue to be addressed presently by those skilled in the art is to provide a device that can avoid the time-consuming and laborious adjustment of the foot pipe by the operator.

SUMMARY

100041 In view of this, an object of the present disclosure is to provide an extension 30 adjustment device for a foot pipe, which can realize extension adjustment of a foot pipe quickly and labor-savingly. The device is simple in structure and convenient in operation, and can be popularized.

[0005] Another object of the present disclosure is to provide an extension adjustment device for a fishing box including the above extension adjustment device for the foot pipe, which can quickly and labor-savingly realize height adjustment of the fishing box.

[0006] In order to achieve the above objectives, the following technical solutions are

provided in the present disclosure.

[0007] In accordance with a first aspect of the present invention, there is provided an extension adjustment device for a foot pipe comprising a frame, a locking device sleeved on an outer circumference of a foot pipe and configured to lock the foot pipe, and an adjustment device for adjusting a degree of locking between the locking device and the foot pipe. The locking device includes an annular locking block with a protruding opening on a side.

[0008] Upper and lower sides of the frame and the locking block are correspondingly provided with first through holes allowing the foot pipe to pass through, and front and rear sides of the frame and the protruding opening are correspondingly provided with second through holes allowing a connecting shaft to pass through. The adjustment device includes a wrench sleeved on the front and rear sides of the frame and connected with the connecting shaft, and the rotation of the wrench is for adjusting the size of the protruding opening.

[0009] Preferably, the locking device includes a bracket configured to fix the locking block in the frame. Front and rear sides of the bracket may be provided with mounting grooves corresponding to the second through holes. An inner unidirectional tooth block engaged with a side portion of the protruding opening and an outer unidirectional tooth block configured to drive the inner unidirectional tooth block to move forward and backward may be provided in each of the mounting grooves. The outer unidirectional tooth block may be engaged with the wrench. Both the inner unidirectional tooth block and the outer unidirectional tooth block may be provided with circular holes allowing the connecting shaft to pass through.

[0010] Preferably, one of an outer side of the protruding opening and an inner side of the inner unidirectional tooth block is provided with a protrusion, and the other is provided with a recess cooperating with the protrusion. An outer side of the inner unidirectional tooth block and an inner side of the outer unidirectional tooth block may be correspondingly provided with bevel teeth engaged with each other.

[0011] Preferably, one of an outer side of the outer unidirectional tooth block and an inner side of the wrench is provided with a square-hole boss, and the other is provided with a square-hole groove cooperating with the square-hole boss.

[0012] Preferably, a protective lining is embedded in an inner circumference of the locking block, and the locking block, the protective lining, the bracket and the frame may be correspondingly provided with passages allowing a fastener to vertically pass through.

100131 Preferably, an end of the connecting shaft passing through the second through hole is provided with an external thread, and a nut is sleeved on the external thread.

The nut may be provided with an internal thread mating with the external thread, and the nut may abut against an outer side of the wrench.

[0014] Preferably, a rotatable fine-adjustment hand wheel is sleeved on an outer circumference of the nut, and a hexagonal groove cooperating with a hexagonal surface at an end of the nut is provided inside the fine-adjustment hand wheel.

[0015] Preferably, a shaft groove is provided between an end of the connecting shaft and the external thread in a circumferential direction, and the fine-adjustment hand wheel may be provided with holes allowing position-limiting pins to vertically pass through two sides of the shaft groove.

[0016] Preferably, the wrench has a U-shaped groove structure, and a handle portion 20 may be provided at the bottom of the U-shaped groove structure.

[0017] In accordance with a second aspect of the present invention, there is provided an extension adjustment device for a fishing box comprising a fishing box and the extension adjustment device for the foot pipe according to the first aspect of the present invention. The extension adjustment device for the foot pipe may be connected with the foot pipe of the fishing box to adjust the locking degree of the foot pipe.

100181 When using the extension adjustment device for the foot pipe according to the present disclosure, first, the locking device may be placed into the frame, and the through holes on the upper and lower sides of the locking block are aligned with the through holes on the upper and lower sides of the frame, and then the foot pipe is inserted into the first through holes, and then the wrench is sleeved on the front and rear sides of the frame, and the wrench is aligned with the second through holes on the front and rear sides of the frame, and finally, the connecting shaft is inserted into the second through holes to realize the overall installation of the device. Then, the size of the protruding opening can be adjusted by turning the wrench. When the size of the protruding opening is reduced, the foot pipe is further locked by the locking block, and when the size of the protruding opening reaches the minimum, the foot pipe cannot move up or down, and this is the locking state of the foot pipe. When the size of the protruding opening becomes larger, the locking block gradually releases the foot pipe, and as the locking degree of the locking block decreases, the operator can pull the foot pipe up and down, so that the foot pipe can extend or contract. When the foot pipe reaches a predetermined position, the wrench is turned reversely to lock the foot pipe.

100191 In the device, the foot pipe may be locked or released by means of the elastic deformation of the locking block to facilitate the positioning and extension adjustment of the foot pipe, and since the wrench has a torque amplification effect, the foot pipe can be more labor-savingly and easily locked by turning the wrench.

100201 In summary, the extension adjustment device for the foot pipe according to the present disclosure can realize extension adjustment of the foot pipe quickly and labor-savingly, and the device is simple in structure and convenient in operation, and can be popularized.

100211 In addition, the extension adjustment device for the fishing box including the above extension adjustment device for the foot pipe is further provided according to the present disclosure, which can quickly and labor-savingly realize height adjustment of the fishing box.

BRIEF DESCRIPTION OF THE DRAWINGS

100221 For more clearly illustrating embodiments of the present disclosure or the technical solutions in the conventional technology, drawings to be used in the description of the embodiments or the conventional technology will be briefly described hereinafter. Apparently, the drawings in the following description are only some embodiments of the present disclosure. For those skilled in the art, other drawings may be obtained based on the provided drawings without any creative work. The present invention will therefore now be described by way of example only with reference to the following figures of which: [0023] FIG. 1 is an exploded view of an extension adjustment structure for a foot pipe and a foot pipe in the conventional technology; [0024] FIG. 2 is a schematic view of the assembly of the extension adjustment structure for the foot pipe and the foot pipe in the conventional technology; [0025] FIG. 3 is a sectional view of FIG. 2; [0026] FIG. 4 is a working principle view of FIG. 3; [0027] FIG. 5 an exploded view of an extension adjustment device for a foot pipe according to the present disclosure and a foot pipe; [0028] FIG. 6 is a schematic view of the installation of a locking device; 100291 FIG. 7 is a schematic view of the assembly of the locking device and a frame; [0030] FIG. 8 is a schematic view of the assembly of inner unidirectional tooth blocks and outer unidirectional tooth blocks with the structure of FIG. 7; 100311 FIG. 9 is a schematic view of the assembly of a connecting shaft, a wrench, a nut, a fine-adjustment hand wheel and position-limiting pins with the structure of FIG. 15 8; 100321 FIG. 10 is a schematic structural view of the extension adjustment device for the foot pipe according to the present disclosure after installation; [0033] FIG. 11 is a schematic structural view of the extension adjustment device for the foot pipe and the foot pipe in an unlocked state; 100341 FIG. 12 is a front view of FIG. 11; [0035] FIG. 13 is a top view of FIG. 11, including an internal cross-sectional view; 100361 FIG. 14 is a schematic structural view of the extension adjustment device for the foot pipe and the foot pipe in a locked state; 100371 FIG. 15 is a front view of FIG. 14; [0038] FIG. 16 is a top view of FIG. 14, including an internal cross-sectional view; [0039] FIG. 17 is a schematic structural view of a locking block, the inner unidirectional tooth blocks, the outer unidirectional tooth blocks and the connecting shaft in the unlocked state; [0040] FIG. 18 is a top view of FIG. 17; [0041] FIG. 19 is a schematic structural view of the locking block, the inner unidirectional tooth blocks, the outer unidirectional tooth blocks and the connecting shaft in an intermediate state; [0042] FIG. 20 is a top view of FIG. 19; [0043] FIG. 21 is a schematic structural view of the locking block, the inner unidirectional tooth blocks, the outer unidirectional tooth blocks and the connecting shaft in the locked state; [0044] FIG. 22 is a top view of FIG. 21; and [0045] FIG. 23 is a schematic structural view of an extension adjustment device for a

fishing box according to the present disclosure.

[0046] Reference numerals in FIGS 1 to 23 are listed as follows: 01 base, 02 hand wheel, 03 pressing block, 04 fastener, 1 foot pipe, 2 frame, 3 locking device, 4 adjustment device, first through hole, 6 second through hole, 7 protruding opening, 8 locking block, 9 connecting shaft, 10 wrench, 11 bracket, 12 mounting groove, 13 inner unidirectional tooth block, 14 outer unidirectional tooth block, protrusion, 16 recess, 17 bevel tooth, 18 square-hole boss, 19 square-hole groove, 20 first protective sheet, 21 second protective sheet, 22 external thread, 23 nut, 24 fine-adjustment hand wheel, shaft groove, 26 position-limiting pin, 27 hole, 28 fastener, 29 handle portion, 30 fishing box, H1 spacing between outer sides of two outer unidirectional tooth blocks, H2 dimension of protruding opening, D1 inner diameter of locking block, D2 diameter of foot pipe.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The technical solutions according to the embodiments of the present disclosure will be described clearly and completely as follows in conjunction with the drawings in the embodiments of the present disclosure. It is apparent that the described embodiments are only a pad of the embodiments according to the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all of the other embodiments which are obtained by those skilled in the art without any creative work fall within the protection scope of the present

disclosure.

100481 A core of the present disclosure is to provide an extension adjustment device for a foot pipe, which can realize extension adjustment of a foot pipe quickly and labor-savingly. The device is simple in structure and convenient in operation, and can be popularized. Another core of the present disclosure is to provide an extension adjustment device for a fishing box including the above extension adjustment device for the foot pipe, which can quickly and labor-savingly realize height adjustment of the fishing box.

100491 Reference is made to FIGS. 1 to 23.

100501 An extension adjustment device for a foot pipe is provided according to the present embodiment, which includes a frame 2, a locking device 3 sleeved on an outer circumference of a foot pipe 1 and configured to lock the foot pipe 1, and an adjustment device 4 for adjusting the degree of locking between the locking device 3 and the foot pipe 1. The locking device 3 includes an annular locking block 8 with a protruding opening 7 on a side. Upper and lower sides of the frame 2 and the locking block 8 are correspondingly provided with first through holes 5 allowing the foot pipe 1 to pass through, and front and rear sides of the frame 2 and the protruding opening 7 are correspondingly provided with second through holes 6 allowing a connecting shaft 9 to pass through. The adjustment device 4 includes a wrench 10 sleeved on the front and rear sides of the frame 2 and connected with the connecting shaft 9, and the rotation of the wrench 10 is for adjusting the size of the protruding opening 7. 100511 It should be noted that, the annular locking block 8 is sleeved on the outer circumference of the foot pipe 1, the locking block 8 is provided with the protruding opening 7, and the size of the protruding opening 7 varies along with the rotation of the wrench 10, to adjust a gap between the locking block 8 and the foot pipe 1, thereby changing the locking degree of the locking block 8 to the foot pipe 1. The protruding opening 7 is a notch of the annular locking block 8. As the size of the protruding opening 7 decreases, it means that the size of the notch of the annular locking block 8 decreases, that is, the annular locking block 8 further locks the foot pipe 1 to realize the positioning of the foot pipe 1. As the size of the protruding opening 7 increases, it means that the size of the notch of the annular locking block 8 increases, that is, the annular locking block 8 further releases the foot pipe 1, so that the operator can pull the foot pipe 1 up and down for extension adjustment. [0052] In the actual application process, shapes, structures, sizes, positions, materials, and the like of the foot pipe 1, the frame 2, the locking device 3, the adjustment device 4, the locking block Sand the wrench 10 may be determined according to the actual situation and actual needs.

[0053] When using the extension adjustment device for the foot pipe according to the present disclosure, first, the locking device 3 is placed into the frame 2, and the through holes 5 on the upper and lower sides of the locking block 8 are aligned with the through holes 5 on the upper and lower sides of the frame 2, and then the foot pipe 1 is inserted into the first through holes 5, and then the wrench 10 is sleeved on the front and rear sides of the frame 2, and the wrench 10 is aligned with the second through holes 6 on the front and rear sides of the frame 2, and finally, the connecting shaft 9 is inserted into the second through holes 6 to realize the overall installation of the device. Then, the size of the protruding opening 7 can be adjusted by turning the wrench 10. When the size of the protruding opening 7 is reduced, the foot pipe 1 is further locked by the locking block 8, and when the size of the protruding opening 7 reaches the minimum, the foot pipe 1 cannot move up or down, and this is the locking state of the foot pipe 1. When the size of the protruding opening 7 becomes larger, the locking block 8 gradually releases the foot pipe 1, and as the locking degree of the locking block 8 decreases, the operator can pull the foot pipe 1 up and down, so that the foot pipe 1 can extend or contract. When the foot pipe 1 reaches a predetermined position, the wrench 10 is turned reversely to lock the foot pipe 1. 100541 In the device, the foot pipe 1 is locked or released by means of the elastic deformation of the locking block 8 to facilitate the positioning and extension adjustment of the foot pipe 1, and since the wrench 10 has a torque amplification effect, the foot pipe 1 can be more labor-savingly and easily locked by turning the wrench 10.

[0055] In summary, the extension adjustment device for the foot pipe according to the present disclosure can realize extension adjustment of the foot pipe 1 quickly and labor-savingly, and the device is simple in structure and convenient in operation, and can be popularized.

[0056] On the basis of the above embodiment, preferably, the locking device 3 includes a bracket 11 configured to fix the locking block 8 in the frame 2. Front and rear sides of the bracket 11 are provided with mounting grooves 12 corresponding to the second through holes 6. An inner unidirectional tooth block 13 engaged with a side portion of the protruding opening 7 and an outer unidirectional tooth block 14 configured to drive the inner unidirectional tooth block 13 to move forward and backward are provided in each of the mounting grooves 12. The outer unidirectional tooth block 14 is engaged with the wrench 10. Both the inner unidirectional tooth block 13 and the outer unidirectional tooth block 14 are provided with circular holes allowing the connecting shaft 9 to pass through.

100571 It should be noted that, when the locking device 3 and the adjustment device 4 are installed, the locking block 8 is first installed in the bracket 11, and then the inner unidirectional tooth blocks 13 and the outer unidirectional tooth blocks 14 are installed in the mounting grooves 12 of the bracket 11, so that inner sides of the two inner unidirectional tooth blocks 13 are respectively engaged with and fixed to two sides of the protruding opening 7, and inner sides of the outer unidirectional tooth blocks 14 abut against corresponding outer sides of the inner unidirectional tooth blocks 13 to drive the inner unidirectional tooth blocks 13 to move laterally back and forth, and then the wrench 10 is aligned with the second through holes 6 of the frame 2 for installation, and then the connecting shaft 9 is successively passed through one side of the wrench 10, one outer unidirectional tooth block 14, one inner unidirectional tooth block 13, the protruding opening 7, the other inner unidirectional tooth block 13, the other outer unidirectional tooth block 14, and the other side of the wrench 10. Therefore, the outer unidirectional tooth blocks 14 are driven to rotate when the wrench 10 is rotated, and the inner unidirectional tooth blocks 13 are driven to laterally move back and forth during the rotation of the outer unidirectional tooth blocks 14. With the lateral movement of the inner unidirectional tooth blocks 13 back and forth, the size of the protruding opening 7 varies, thereby adjusting the locking degree between the locking block 8 and the foot pipe 1. The division of inner side and outer side is as follows, a side of a part relatively close to the locking block 8 is defined as the inner inside, a side of the part relatively away from the locking block 8 is defined as the outer side. The inner unidirectional tooth blocks 13, the outer unidirectional tooth blocks 14, and the mounting grooves 12 on two sides of the protruding opening 7 are all symmetrically arranged.

[0058] Preferably, one of an outer side of the protruding opening 7 and an inner side of the inner unidirectional tooth block 13 is provided with a protrusion 15, and the other is provided with a recess 16 cooperating with the protrusion 15. An outer side of the inner unidirectional tooth block 13 and an inner side of the outer unidirectional tooth block 14 are correspondingly provided with bevel teeth 17 engaged with each other.

100591 It should be noted that, sides of the protruding opening 7 are engaged with and fixed to the inner unidirectional tooth blocks 13 through the protrusions 15 and the recesses 16, so that when the inner unidirectional tooth blocks 13 move back and forth, two sides of the protruding opening 7 are pushed to move synchronously to change the size of the protruding opening 7 and adjust the locking degree between the locking block 8 and the foot pipe 1.

100601 Moreover, since the outer sides of the inner unidirectional tooth blocks 13 and the inner sides of the outer unidirectional tooth blocks 14 are correspondingly provided with bevel teeth 17 engaged with each other, positions of the bevel teeth 17 on the inner sides of the outer unidirectional tooth blocks 14 are changed to push the bevel teeth 17 of the inner unidirectional tooth blocks 13 to move when the outer unidirectional tooth blocks 14 rotate, and then the inner unidirectional tooth blocks 13 on two sides of the protruding opening 7 are driven to approach or move away from each other. When the two inner unidirectional tooth blocks 13 approach each other, the size of the protruding opening 7 is reduced, so that the locking block 8 further locks the foot pipe 1, while when the two inner unidirectional tooth blocks 13 move away from each other, the size of the protruding opening 7 is increased, so that the locking block 8 releases the foot pipe 1 slightly.

[0061] In the actual application process, shapes, structures, positions, sizes, and the like of the protruding opening 7, the inner unidirectional tooth blocks 13, and the outer unidirectional tooth blocks 14 may be determined according to the actual situation and actual needs.

[0062] Preferably, one of an outer side of the outer unidirectional tooth block 14 and an inner side of the wrench 10 is provided with a square-hole boss 18, and the other is provided with a square-hole groove 19 cooperating with the square-hole boss 18. Therefore, the wrench 10 is engaged with and fixed to the outer unidirectional tooth blocks 14 through the square-hole bosses 18 and the square-hole grooves 19, so that the two outer unidirectional tooth blocks 14 and the wrench 10 rotate synchronously to drive the inner unidirectional tooth blocks 13 to move, thereby adjusting the size of the protruding opening 7.

[0063] In addition, it should be noted that, in addition to the configuration of providing bevel teeth 17 engaged with each other on the outer sides of the inner unidirectional tooth blocks 13 and the inner sides of the outer unidirectional tooth blocks 14 for driving the inner unidirectional tooth blocks 13 to move along the connecting shaft 9 when the outer unidirectional tooth blocks 14 rotate, the outer unidirectional tooth blocks 14 may be configured to have eccentric cam structures, and the inner unidirectional tooth blocks 13 may also move along the connecting shaft 9 during the rotation of the eccentric cam structures to adjust the size of the protruding opening 7.

Therefore, in the actual application process, the movement cooperating manner, structures, and the like of the inner unidirectional tooth blocks 13 and the outer unidirectional tooth blocks 14 may be determined according to the actual situation and actual needs.

[0064] Preferably, a protective lining is embedded in an inner circumference of the locking block 8, and the locking block 8, the protective lining, the bracket 11 and the frame 2 are correspondingly provided with passages allowing a fastener 28 to vertically pass through.

[0065] It should be noted that, two circular-hole passages may be provided on sides of the locking block 8, and the protective lining may be arranged as a first protective sheet 20 and a second protective sheet 21 which are arranged up and down. The first protective sheet 20 abuts against an upper half of the locking block 8, and a side of the first protective sheet 20 corresponding to the circular-hole passage is provided with a cooperating member for locking the fastener 28. The second protective sheet 21 abuts against a lower half of the locking block 8, and a side of the second protective sheet 21 corresponding to the circular-hole passage is provided with a circular hole allowing the fastener 28 to pass through. The bracket 11 is correspondingly provided with a cavity for installing the passages of the locking block 8 and the protective lining. The frame 2 can accommodate the bracket 11, and the bottom of the frame 2 is correspondingly provided with a circular hole allowing the fastener 28 to pass through.

[0066] Therefore, when the locking device 3 is assembled, the first protective sheet and the second protective sheet 21 are first arranged to abut against an inner circumferential wall of the locking block 8, so that the cooperating member of the first protective sheet 20 is aligned with the top of the circular-hole passage of the locking block 8 and the circular hole of the second protective sheet 21 is aligned with the bottom of the circular-hole passage of the locking block 8, and then the locking block 8 is installed inside the bracket 11, so that the passage is inserted into the cavity of the bracket 11, and then the bracket 11 is installed into the frame 2, so that the passage is aligned with the circular hole at the bottom of the frame 2, and finally, the fastener 28 is sequentially passed through the circular hole of the frame 2, the circular hole of the second protective sheet 21, and the circular-hole passage of the locking block 8 and is finally locked and fixed with the cooperating member of the first protective sheet 20, and the bracket 11 and the locking block 8 are effectively fixed in the frame 2 so as not to move up or down.

[0067] Preferably, an end of the connecting shaft 9 passing through the second through hole 6 is provided with an external thread 22, and a nut 23 is sleeved on the external thread 22. The nut 23 is provided with an internal thread mating with the external thread 22, and the nut 23 abuts against an outer side of the wrench 10. Another nut is welded to another end of the connecting shaft 9, so that the nut at the another end directly abuts against the wrench 10 for fixation, while the nut 23 mating with the external thread 22 can change its position during the rotation to compress or release the wrench 10, and the potions of the outer unidirectional tooth blocks and the inner unidirectional tooth blocks are thereby adjusted, and finally the size of the protruding opening 7 is changed. In addition, the nuts 23 on two sides of the connecting shaft 9 can effectively connect the wrench 10 with the outer unidirectional tooth blocks, the inner unidirectional tooth blocks and the locking block 8, to facilitate corresponding adjustment operations.

100681 Preferably, a rotatable fine-adjustment hand wheel 24 is sleeved on an outer circumference of the nut 23, and a hexagonal groove cooperating with a hexagonal surface at an end of the nut 23 is provided inside the fine-adjustment hand wheel 24.

[0069] Therefore, by rotating the fine-adjustment hand wheel 24, the nut 23 is driven to rotate synchronously. The nut 23 moves along the external thread 22 of the connecting shaft 9 during the rotation, and the nut may further squeeze the wrench 10 or further move away from the wrench 10. Positions of the outer unidirectional tooth blocks and the inner unidirectional tooth blocks are adjusted due to the movement of the wrench 10, and the size of the protruding opening 7 is thereby changed. In addition, the fine-adjustment hand wheel 24 can only function in a case that the foot pipe 1 is not completely locked by the wrench 10. When the wrench 10 is rotated to an extreme position, the size of the protruding opening 7 is the minimum, and the foot pipe 1 cannot be moved and is effectively locked, and the fine-adjustment hand wheel 24 cannot function at this time. When the wrench 10 is rotated to another position and the foot pipe 1 is in an unlocked state, the fine-adjustment hand wheel 24 may be rotated to appropriately adjust the holding force of the locking block 8 to the foot pipe 1.

[0070] It should be noted that the fine-adjustment hand wheel 24 is engaged with the nut 23 through the hexagonal groove and the hexagonal surface, which can effectively prevent the fine-adjustment hand wheel 24 from rotating freely, and the rotation can be realized only if the operator applies a force.

[0071] Preferably, a shaft groove 25 is provided between an end of the connecting shaft 9 and the external thread 22 in a circumferential direction, and the fine-adjustment hand wheel 24 is provided with holes 27 allowing position-limiting pins 26 to vertically pass through two sides of the shaft groove 25. Therefore, the position-limiting pins 26 are inserted into the holes 27 of the fine-adjustment hand wheel 24 and pass through the shaft groove 25 of the connecting shaft 9, to effectively clamp and fix the fine-adjustment hand wheel 24 and the connecting shaft 9, to prevent the fine-adjustment hand wheel 24 and the connecting shaft 9 from falling off as the nut 23 is too loose.

100721 In the actual application process, shapes, sizes, structures, positions and the like of the shaft groove 25, the position-limiting pins 26, and the holes 27 may be determined according to the actual situation and actual needs.

[0073] Preferably, the wrench 10 has a U-shaped groove structure, and a handle portion 29 is provided at the bottom of the U-shaped groove structure.

[0074] It should be noted that, the wrench 10 is similar to the U-shaped groove structure, two parallel sides of the U-shaped groove structure respectively abut against front and rear sides of the frame 2, and these two parallel sides are equivalent to a moment arm of the wrench 10 during the rotation, which allows the operator to rotate the wrench 10 more labor-savingly. In addition, the wrench 10 is provided with a handle portion 29, which is convenient for the operator to control and use and improves the experience of using the device. The two parallel sides of the U-shaped groove structure may be arranged as an arc structure. Therefore, the locking and unlocking of the foot pipe 1 can be realized by just rotating the wrench 10 about 90 degrees, so that the wrench 10 can be rotated more conveniently and fast. In the actual application process, shapes, structures, sizes and the like of the wrench 10 may be determined according to the actual situation and actual needs.

100751 In order to further illustrate the use process of the extension adjustment device for the foot pipe provided according to the present disclosure, an example will be given next.

100761 When the extension adjustment device for the foot pipe is assembled, in the first step, as shown in FIG. 6, the first protective sheet 20 and the second protective sheet 21 are installed to the inner circumference of the locking block 8, and then the locking block 8 is installed to the bracket 11; in the second step, as shown in FIG. 7, the components installed in the previous step are installed in the frame 2, and the bracket 11 and the locking block 8 are fixed in the frame 2 by the fastener 28; in the third step, as shown in FIG. 8, the inner unidirectional tooth blocks 13 and the outer unidirectional tooth blocks 14 are sequentially installed into the mounting grooves 12 on two sides of the bracket 11; in the fourth step, as shown in FIG. 9, the connecting shaft 9, the wrench 10, the nut 23, the fine-adjustment hand wheel 24 and the position-limiting pins 26 are installed to the components installed in the previous step, and finally the assembly of the extension adjustment device for the foot pipe is realized, as shown in FIG. 10.

[0077] When the extension adjustment device for the foot pipe provided according to the present disclosure is used to perform extension adjustment and positioning operations on the foot pipe 1, when the wrench 10 is rotated to the upper half of the foot pipe 1, as shown in FIGS. 11 to 13, FIG. 17 and FIG. 18, the foot pipe 1 is in an unlocked state at this time, and when the fine-adjustment hand wheel 24 and the nut 23 are both screwed to the connecting shaft 9, a spacing H1 between the outer sides of the two outer unidirectional tooth blocks 14 is a constant value, and a dimension H2 of the protruding opening 7 is the maximum, and the inner unidirectional tooth blocks 13 and the outer unidirectional tooth blocks 14 in the mounting grooves 12 on two sides of the protruding opening 7 engage with each other on an unlocking plane M. At this time, an inner diameter D1 of the locking block 8 is greater than a diameter D2 of the foot pipe 1, so there is a gap is between the locking block 8 and the foot pipe 1, and the foot pipe 1 can move up and down.

[0078] When the wrench 10 is rotated downward from the locked state, as shown in FIGS. 19 and 20, the foot pipe 1 is in an intermediate sate between the locked state and the unlocked state, that is, when the wrench 10 is rotated around the connecting shaft 9, the wrench 10 is engaged with and fixed to the outer unidirectional tooth blocks 14 through the square-hole bosses 18 and the square-hole grooves 19, so that the wrench 10 can synchronously drive the two outer unidirectional tooth blocks 14 to rotate. When the outer unidirectional tooth blocks 14 rotate, the bevel teeth 17 can drive the inner unidirectional tooth blocks 13 to approach each other. When the two inner unidirectional tooth blocks 13 approach each other, the protruding opening 7 is squeezed, so that the dimension H2 of the protruding opening 7 is reduced, and the locking block 8 is elastically deformed, and the inner diameter D1 of the locking block 8 is also synchronously reduced, finally adjusting the locking degree of the locking block 8 to the foot pipe 1.

[0079] When the wrench 10 is rotated to the lower half of the foot pipe 1, as shown in FIGS. 14 to 16, FIG. 21 and FIG. 22, the foot pipe 1 is in the locked state at this time, so that the inner unidirectional tooth blocks 13 and the outer unidirectional tooth blocks 14 in the mounting grooves 12 on two sides of the protruding opening 7 engage with each other on a locking plane N. At this time, the dimension H2 of the protruding opening 7 is the minimum, and the inner diameter D1 of the locking block 8 is smaller than the diameter D2 of the foot pipe 1, so there is no gap is between the locking block 8 and the foot pipe 1, and the locking block 8 can effectively hold and lock the foot pipe 1, so that the foot pipe 1 cannot move up or down, that is, the positioning operation of the foot pipe 1 can be effectively realized.

[0080] Besides, in the extension adjustment device for the foot pipe provided according to the present disclosure, the foot pipe 1 is held and locked by means of the elastic deformation of the locking block 8, so as to realize the extension adjustment and positioning operations of the foot pipe 1. In addition, a radial rotation force of the wrench 10 is converted into an axial holding force of the locking block 8 through the provided outer unidirectional tooth blocks 14. The operator can lock or unlock the foot pipe 1 by rotating the wrench 10, for example, the foot pipe 1 can be locked or unlocked by rotating the wrench 10 about 90 degrees, which is convenient and fast. Moreover, the wrench 10 has a torque amplification effect, which enables the operator to operate with less effort.

[0081] It should be noted that, as for the first through hole 5 and the second through hole 6, the first protective sheet 20 and the second protective sheet 21 mentioned in this application document, the first and the second are only for distinguishing parts in different positions, and there is no priority among these parts.

[0082] In addition, it should be noted that, the orientation or positional relationships indicated by terms "up", "down", "front", "rear", "inner", "outer" and the like are based on the orientation or positional relationships shown in the drawings, and are merely for the convenience of understanding the present disclosure and the simplification of the description, and do not indicate or imply that the device or element referred to must be in a particular orientation, or be constructed and operated in a particular orientation, and therefore should not be construed as a limit to the scope of the

present disclosure.

[0083] In addition to the extension adjustment device for the foot pipe, an extension adjustment device for a fishing box including the above extension adjustment device for the foot pipe is further provided according to the present disclosure. The extension adjustment device for the fishing box includes a fishing box 30 and the above extension adjustment device for the foot pipe. The extension adjustment device for the foot pipe is connected with the foot pipe 1 of the fishing box 30 to adjust the locking degree of the foot pipe 1. Referring to FIG. 23, as for the structures of other parts of the extension adjustment device for the fishing box, reference may be made to the conventional technology, which will not be repeated here.

[0084] It should be noted that the extension adjustment device for the foot pipe is mainly used to adjust the locking degree of the foot pipe 1, so that it is convenient for the operator to pull the foot pipe 1 in a vertical direction for extension adjustment. When the foot pipe 1 is adjusted to the predetermined position, the foot pipe 1 can be locked by the extension adjustment device for the foot pipe, to realize the positioning control of the foot pipe 1. Through the above operation, the height of the foot pipe 1 off the ground in the vertical direction can be effectively adjusted, that is, the height of the fishing box 30 off the ground can be adjusted. In addition, the extension adjustment device for the foot pipe may be applied to products such as a bicycle and a walking stick in addition to the fishing box 30.

10085] The above embodiments are described in a progressive manner. Each of the embodiments is mainly focuses on describing its differences from other embodiments, and reference may be made among these embodiments with respect to the same or similar parts. Any combination of all embodiments provided according to the present disclosure is within the protection scope of the present disclosure, and will not be repeated here.

100861 The extension adjustment device for the fishing box and the extension adjustment device for the foot pipe provided according to the present disclosure have been described in detail hereinbefore. The principle and the embodiments of the present disclosure are illustrated herein by specific examples. The above description of examples is only intended to facilitate the understanding of the method and spirit of the present disclosure. It should be noted that, for those skilled in the art, many modifications and improvements may be made to the present disclosure without departing from the principle of the present disclosure, and these modifications and improvements are also deemed to fall into the protection scope of the present disclosure defined by the claims.

Claims

Claims 1 An extension adjustment device for a foot pipe, comprising a frame (2), a locking device (3) sleeved on an outer circumference of a foot pipe (1) and configured to lock the foot pipe (1), and an adjustment device (4) for adjusting a degree of locking between the locking device (3) and the foot pipe (1), wherein the locking device (3) comprises an annular locking block (8) with a protruding opening (7) on a side; and upper and lower sides of the frame (2) and the locking block (8) are correspondingly provided with first through holes (5) allowing the foot pipe (1) to pass through, and front and rear sides of the frame (2) and the protruding opening (7) are correspondingly provided with second through holes (6) allowing a connecting shaft (9) to pass through, the adjustment device (4) comprises a wrench (10) sleeved on the front and rear sides of the frame (2) and connected with the connecting shaft (9), and rotation of the wrench (10) is for adjusting the size of the protruding opening (7).
2. The extension adjustment device for the foot pipe according to claim 1, wherein the locking device (3) comprises a bracket (11) configured to fix the locking block (8) in the frame (2), front and rear sides of the bracket (11) are provided with mounting grooves (12) corresponding to the second through holes (6), an inner unidirectional tooth block (13) engaged with a side portion of the protruding opening (7) and an outer unidirectional tooth block (14) configured to drive the inner unidirectional tooth block (13) to move forward and backward are provided in each of the mounting grooves (12), the outer unidirectional tooth block (14) is engaged with the wrench (10), and both the inner unidirectional tooth block (13) and the outer unidirectional tooth block (14) are provided with circular holes allowing the connecting shaft (9) to pass through.
3. The extension adjustment device for the foot pipe according to claim 2, wherein one of an outer side of the protruding opening (7) and an inner side of the inner 4. 5. 6. 7. 8.unidirectional tooth block (13) is provided with a protrusion (15), the other is provided with a recess (16) cooperating with the protrusion (15), an outer side of the inner unidirectional tooth block (13) and an inner side of the outer unidirectional tooth block (14) are correspondingly provided with bevel teeth (17) engaged with each other.
The extension adjustment device for the foot pipe according to claim 3, wherein one of an outer side of the outer unidirectional tooth block (14) and an inner side of the wrench (10) is provided with a square-hole boss (18), and the other is provided with a square-hole groove (19) cooperating with the square-hole boss (18).
The extension adjustment device for the foot pipe according to any preceding claim, wherein a protective lining is embedded in an inner circumference of the locking block (8), and the locking block (8), the protective lining, the bracket (11) and the frame (2) are correspondingly provided with passages allowing a fastener (28) to vertically pass through.
The extension adjustment device for the foot pipe according to any preceding claim, wherein an end of the connecting shaft (9) passing through the second through hole (6) is provided with an external thread (22), a nut (23) is sleeved on the external thread (22), the nut (23) is provided with an internal thread mating with the external thread (22), and the nut (23) is configured to abut against an outer side of the wrench (10).
The extension adjustment device for the foot pipe according to claim 6, wherein a rotatable fine-adjustment hand wheel (24) is sleeved on an outer circumference of the nut (23), and a hexagonal groove cooperating with a hexagonal surface at an end of the nut (23) is provided inside the fine-adjustment hand wheel (24).
The extension adjustment device for the foot pipe according to claim 7, wherein a shaft groove (25) is provided between an end of the connecting shaft (9) and the external thread (22) in a circumferential direction, and the fine-adjustment hand wheel (24) is provided with holes (27) allowing position-limiting pins (26) to vertically pass through two sides of the shaft groove (25).
9. The extension adjustment device for the foot pipe according to any preceding claim, wherein the wrench (10) has a U-shaped groove structure, and a handle portion (29) is provided at the bottom of the U-shaped groove structure.
10. An extension adjustment device for a fishing box, comprising a fishing box (30) and the extension adjustment device for the foot pipe according to any preceding claim, wherein the extension adjustment device for the foot pipe is connected with the foot pipe (1) of the fishing box (30) to adjust the locking degree of the foot pipe (1).