CN112319672A

CN112319672A - Bicycle safety chair with cart function

Info

Publication number: CN112319672A
Application number: CN202011294574.6A
Authority: CN
Inventors: 杨鹏耀
Original assignee: Dongguan Hengyao Daily Necessities Co ltd
Current assignee: Dongguan Hengyao Daily Necessities Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-02-05
Anticipated expiration: 2040-11-18
Also published as: CN112319672B

Abstract

The invention relates to the technical field of child seats, in particular to a bicycle safety seat with a trolley function, which comprises a seat part, a cushion arranged on the seat part, a safety belt arranged on the seat part, two foot placing parts extending downwards from the bottom of the seat part, a bicycle connector detachably connected to the seat part, two front trundles respectively connected to the two foot placing parts, a rear trundle group connected to the bottom of the seat part and a push handle connected to the top of the seat part, wherein the two foot placing parts are arranged in parallel at intervals, and the bicycle connector is positioned between the two foot placing parts. The multifunctional stroller is reasonable in structural design and convenient to use, the stroller and the bicycle safety seat are integrated together, the purpose of dual-purpose or multi-purpose is achieved, the practicability is high, the use cost is reduced, the occupied area is small, and the multifunctional stroller is convenient to store and carry.

Description

Bicycle safety chair with cart function

Technical Field

The invention relates to the technical field of child seats, in particular to a bicycle safety seat with a stroller function.

Background

In order to facilitate a user to ride a bicycle to carry children and ensure the safety of the children, a bicycle safety chair is generally used, and the bicycle safety chair in the prior art has a single function and can only be applied to the bicycle for the children to ride; when a child is required to take a cart, another cart needs to be purchased. The user purchases different products according to the user demand, leads to use cost high, and bicycle safety seat separately deposits and uses with the shallow, and occupation space accomodates and carries extremely inconveniently. Therefore, the drawbacks are obvious, and a solution is needed.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a bicycle safety seat with a cart pushing function, which is convenient to use, integrates a cart and a bicycle safety seat together to achieve the purpose of one object with two purposes or multiple purposes, has strong practicability, reduces the use cost, occupies a small area, and is convenient to store and carry.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a bicycle safety seat with shallow function, its includes seat spare, sets up in the cushion of seat spare, sets up in the safety belt of seat spare, from two of seat spare bottom downwardly extending put foot portion, detachably connects in the bicycle connector of seat spare, connect respectively in two front truckles of putting foot portion, connect in the back foot wheelset of the bottom of seat spare and connect in the pushing handle at the top of seat spare, two put foot portion parallel and interval setting, bicycle connector is located two and puts between the foot portion.

Furthermore, the seat part comprises a seat body and a backrest connected to the seat body, the safety belt is arranged between the seat body and the backrest, the bottom of the backrest is movably connected with the seat body through an elastic locking device, and the middle or the top of the backrest is clamped with the seat body through a clamping device.

Further, the clamping device includes joint spare and with joint spare clearance fit's joint board, the joint board seted up the spout and with two at least draw-in grooves of spout intercommunication, all draw-in grooves arrange the setting along the length direction of spout, the joint spare can remove to in one of them draw-in groove along the spout.

Furthermore, the elastic locking device comprises a rotating shell rotatably connected to the seat body, a sliding block slidably connected with the rotating shell, and a first elastic element arranged between the sliding block and the rotating shell, wherein the sliding block is connected to the bottom of the backrest.

Further, the bicycle connector is connected with the seat part through a quick assembly disassembly structure, the quick assembly disassembly structure comprises a base connected with the seat part, a quick disassembly button connected with the base in a sliding mode, a second elastic piece arranged between the quick disassembly button and the base, a locking piece arranged on the base in a sliding mode and a third elastic piece arranged between the locking piece and the base, the sliding direction of the quick disassembly button and the sliding direction of the locking piece are arranged in a crossed mode, a mounting groove and a through hole communicated with the mounting groove are formed in the base, the locking end of the locking piece protrudes into the mounting groove through the through hole, and the quick disassembly button is connected with a driving piece used for driving the locking piece to move into or out of the mounting groove.

Further, every is put equal detachably in the foot portion and is connected with the running-board, the running-board is connected with the fixed band, the inner wall of putting the foot portion is provided with a plurality of joint grooves, and a plurality of joint grooves arrange the setting along the direction of height of putting the foot portion, the running-board be provided with the fixture block of joint groove joint, the one end of fixed band and one side fixed connection of running-board, the other end of fixed band and the opposite side detachably of running-board are connected.

Further, seat spare detachably is connected with preceding handrail, the tip of preceding handrail is provided with first flexure strip, it is protruding that first flexure strip is protruding to be equipped with first card, seat spare is offered and is used for supplying the first cartridge hole of tip male of preceding handrail, the concave first joint recess that is equipped with the protruding joint of first card of inner wall in first cartridge hole.

Further, seat spare detachably is connected with the bicycle shed, the seat spare seted up the second cartridge hole and with the screens groove of second cartridge hole intercommunication, the inner wall in second cartridge hole is provided with the spacing piece of elasticity, the tip of bicycle shed is provided with the screens piece, the screens piece cartridge removes to the screens inslot behind second cartridge hole, the spacing piece of elasticity is used for spacing the screens piece in the screens inslot.

Furthermore, rear foot rest group includes the rear foot rest of being connected with seat spare, rotates the rear foot rest of connecting in the two bottom of rear foot rest respectively and installs in the rear foot rest and be used for the linkage brake of two rear foot rests of braking.

Further, preceding truckle with put foot portion and rotate and be connected, preceding truckle and put and be provided with locking mechanical system between the foot portion, locking mechanical system is including setting up in the locking sliding tray of preceding truckle, setting up in the locking hole of putting the foot portion and slide and set up the locking piece in the locking sliding tray, the lateral wall of locking sliding tray is concave to be equipped with two third joint recesses, and two third joint recesses are arranged along the length direction of locking sliding tray and are set up, the locking piece is provided with the third flexure strip, the protruding third joint that is equipped with third joint recess joint complex of third flexure strip is protruding, the locking end of locking piece can cartridge to locking downthehole.

The invention has the beneficial effects that: the two foot placing parts are arranged at the bottom of the seat piece and can be used for positioning the shanks of the rider, so that the legs of the rider can be placed at will to avoid accidents, and the safety seat can be arranged on a tail seat of a bicycle and used as a safety seat of the bicycle; the front caster wheel is arranged at the bottom of the foot placing part, the rear caster wheel group is arranged at the bottom of the seat part, and the push handle is arranged at the top of the seat part, so that the invention can be used as a trolley. In practical application, a rider sits in a seat cavity of the seat piece, the safety belt is used for fixing the rider in the seat cavity of the seat piece, the lower leg of the rider is placed in a foot placing cavity of the foot placing part, the front caster wheel and the rear caster wheel group play a role in rolling and supporting the seat piece, and the user holds the pushing handle by hand and pushes the trolley to move, so that the trolley is used as a trolley; when the invention is used as a cart, the bicycle connector can be detached from the seat piece, thereby not only having beautiful appearance, but also occupying less space and being convenient for the movement of the invention; when the safety seat is required to be installed on the tailstock of a bicycle for use, the bottom end of the bicycle connector is fixedly connected with a bracket of the bicycle, the top end of the bicycle connector is fixedly connected with the seat piece, the seat piece is borne on the tailstock of the bicycle, the two foot placing parts are inserted on the tailstock, and are respectively positioned on two sides of the tailstock, so that the seat piece is fixed on the tailstock of the bicycle and can be used as a safety seat of the bicycle; when the invention is used as a bicycle safety seat, the rear caster wheel group can be detached from the seat component. The multifunctional stroller is reasonable in structural design and convenient to use, the stroller and the bicycle safety seat are integrated together, the purpose of dual-purpose or multi-purpose is achieved, the practicability is high, the use cost is reduced, the occupied area is small, and the multifunctional stroller is convenient to store and carry.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic perspective view of another aspect of the present invention.

Fig. 3 is a schematic perspective view of the seat member, the elastic locking device and the latch device according to the present invention.

FIG. 4 is an exploded view of the seat member, the elastic locking device and the latch device of the present invention.

Fig. 5 is an exploded view of the backrest, the elastic locking device and the latch device of the present invention.

FIG. 6 is a perspective view of the bicycle connector, quick release structure and seat member of the present invention.

FIG. 7 is a perspective view of the bicycle connector and quick release structure of the present invention.

FIG. 8 is a cross-sectional view of the bicycle connector and quick release structure of the present invention.

FIG. 9 is an exploded view of the quick release structure of the present invention.

Fig. 10 is a schematic perspective view of the footrest section, the footrest plate, and the fastening band according to the present invention.

Fig. 11 is an exploded view of the footrest section, the footrest plate, and the fastening band of the present invention.

Fig. 12 is an exploded view of the footrest, footrest and mounting strap of the present invention from another perspective.

Fig. 13 is an exploded view of the carport with the tarpaulin concealed according to the present invention.

Fig. 14 is an exploded view of the seat body and the front armrest of the present invention.

Figure 15 is an exploded view of the front caster and locking mechanism of the present invention.

Description of reference numerals:

1. a seat body; 11. a second connection hole; 12. a seat belt; 13. a front caster; 14. a rear caster set; 141. a rear foot rest; 142. a rear caster; 143. a linkage brake; 15. a push handle; 16. a locking mechanism; 161. locking the sliding groove; 163. a locking member; 164. a third clamping groove; 165. a third elastic sheet; 166. a third snap projection; 17. an angle adjustment joint; 18. a cushion; 19. an adjustment hole; 2. a backrest; 21. a first connection hole; 22. a second regulating groove; 3. an elastic locking device; 31. rotating the shell; 32. a slider; 33. a first elastic member; 34. a guide plate; 35. a guide groove; 36. a first regulating groove; 37. a through hole; 38. a positioning cavity; 4. a clamping device; 41. a clamping piece; 42. a clamping and connecting plate; 43. a chute; 44. a card slot; 45. a limiting block; 5. a quick-assembly-disassembly structure; 51. a base; 511. mounting grooves; 512. a via hole; 513. a first guide channel; 514. a second guide channel; 515. a limiting step; 516. positioning the projection; 52. a quick release button; 53. a second elastic member; 54. a locking member; 541. a touch bar; 542. abutting against the inclined plane; 543. a fixing hole; 55. a third elastic member; 56. a drive member; 561. a drive ramp; 562. avoiding the notch; 57. a limiting seat; 571. a guide groove; 58. sealing the cover; 6. a connector; 61. a clamping and connecting rod; 62. a mounting head; 63. tabletting; 64. a support bar; 65. a connecting rod; 7. a seat member; 71. fixing belts; 711. embedding a block; 72. a foot placing part; 73. a foot pedal; 731. embedding a mounting hole; 732. a through hole is formed; 74. a clamping groove; 75. a clamping block; 76. avoiding the slot; 77. a limiting elastic sheet; 78. buckling holes; 79. a button; 8. a front armrest; 81. a first elastic sheet; 82. a first snap projection; 83. a first insertion hole; 84. a first clamping groove; 9. a carport; 90. a joint end; 91. a second insertion hole; 92. a clamping groove; 93. an elastic limiting sheet; 94. a bit block; 95. folding gear joints; 96. a shed strip is turned; 97. a second clamping groove; 98. a third insertion hole; 99. a second elastic sheet; 991. and a second snap projection.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

As shown in fig. 1 to 15, the present invention provides a bicycle safety seat with a stroller function, which comprises a seat member 7, a seat cushion 18 provided to the seat member 7, a safety belt 12 provided to the seat member 7, two footrest sections 72 extending downward from the bottom of the seat member 7, a bicycle coupling 6 detachably coupled to the seat member 7, two front casters 13 respectively coupled to the two footrest sections 72, a rear caster 14 coupled to the bottom of the seat member 7, and a push handle 15 coupled to the top of the seat member 7, the two footrest sections 72 being arranged in parallel and spaced apart, the bicycle coupling 6 being positioned between the two footrest sections 72, one end of the bicycle coupling 6 protruding out of the seat body 1, the footrest sections 72 being provided with footrest cavities for seating the lower legs of an occupant, the front caster 13 and the rear caster 14 being respectively positioned at the front end and the rear end of the seat member 7, the seat element 7 is provided with a seat cavity for seating an occupant, and the seat cushion 18 is located in the seat cavity.

The two foot placing parts 72 are arranged at the bottom of the seat part 7, so that the foot placing parts 72 can position the legs of the rider, the occurrence of accidents caused by the random placement of the legs of the rider is avoided, and the safety seat can be arranged on a tailstock of a bicycle and used as a safety seat of the bicycle; the front caster 13 is arranged at the bottom of the foot placing part 72, the rear caster group 14 is arranged at the bottom of the seat part 7, and the push handle 15 is arranged at the top of the seat part 7, so that the invention can be used as a trolley. In practical application, a passenger sits in a seat cavity of the seat element 7, the safety belt 12 is used for fixing the passenger in the seat cavity of the seat element 7, the lower leg of the passenger is placed in a foot placing cavity of the foot placing part 72, the front caster 13 and the rear caster group 14 play a role of rolling support for the seat element 7, and a user holds the push handle 15 with a hand and pushes the invention to move, so that the invention is used as a trolley; when the invention is used as a cart, the bicycle connector 6 can be detached from the seat part 7, which not only has beautiful appearance, but also does not occupy space, thus being convenient for the invention to move; when the bicycle safety seat is required to be installed on a tailstock of a bicycle for use, the bottom end of the bicycle connector 6 is fixedly connected with a bracket of the bicycle, the top end of the bicycle connector 6 is fixedly connected with the seat part 7, the seat part 7 is borne on the tailstock of the bicycle, the two foot placing parts 72 are inserted on the tailstock, and the two foot placing parts 72 are respectively positioned at two sides of the tailstock so as to fix the seat part 7 on the tailstock of the bicycle, so that the bicycle safety seat can be used as a bicycle safety seat; when the present invention is used as a bicycle safety seat, the rear caster set 14 can be detached from the seat member 7.

The multifunctional stroller is reasonable in structural design and convenient to use, the stroller and the bicycle safety seat are integrated together, the purpose of dual-purpose or multi-purpose is achieved, the practicability is high, the use cost is reduced, the occupied area is small, and the multifunctional stroller is convenient to store and carry. The invention is particularly suitable for outdoor use.

In this embodiment, the seat component 7 includes a seat body 1 and a backrest 2 connected to the seat body 1, the safety belt 12 is disposed between the seat body 1 and the backrest 2, the foot placing portion 72 extends downward from the bottom of the seat body 1, the backrest 2 is rotatably connected to the seat body 1 via a backrest 2 adjusting mechanism, the backrest 2 adjusting mechanism includes an elastic locking device 3 and a latch device 4, the bottom of the backrest 2 is movably connected to the seat body 1 via the elastic locking device 3, and the middle portion or the top of the backrest 2 is latched to the seat body 1 via the latch device 4. Preferably, the number of the elastic locking devices 3 and the number of the clamping devices 4 are two, two sides of the backrest 2 are movably connected with two inner walls of the seat body 1 through the two elastic locking devices 3 respectively, and two sides of the backrest 2 are clamped with the two inner walls of the seat body 1 through the clamping devices 4 respectively; specifically, clamping device 4 includes joint spare 41 and with joint spare 41 clearance fit's joint board 42, joint board 42 has seted up spout 43 and two at least draw-in grooves 44 that communicate with spout 43, and all draw-in grooves 44 are arranged along the length direction of spout 43 and are set up, joint spare 41 can remove to in one of them draw-in groove 44 along spout 43. Specifically, one embodiment is: the clamping piece 41 is arranged on the seat body 1, and the clamping plate 42 is arranged on the backrest 2; the other implementation mode is as follows: the engaging member 41 is disposed on the backrest 2, and the engaging plate 42 is disposed on the seat body 1.

When the backrest 2 and the seat body 1 are in a fixed state, the clamping piece 41 is clamped with one clamping groove 44, the elastic locking device 3 applies elastic force to the backrest 2 and the seat body 1, so that the clamping piece 41 is firmly clamped in the clamping groove 44 of the clamping plate 42, the backrest 2 is clamped with the seat body 1, and the backrest 2 and the seat body 1 are locked and fixed; when the inclination angle of the backrest 2 needs to be adjusted, the backrest 2 is lifted upwards, so that the backrest 2 moves upwards relative to the seat body 1, so that the latch member 41 moves from the slot 44 of the latch plate 42 to the chute 43, and the elastic locking device 3 is in the state of storing elastic potential energy, and the backrest 2 can rotate relative to the seat body 1 via the elastic locking device 3, simultaneously, the backrest 2 is pushed forwards or backwards, the backrest 2 rotates relative to the seat body 1, so that the clamping piece 41 slides in the sliding groove 43, when the inclination angle of the backrest 2 reaches the required angle and the clamping piece 41 slides to correspond to one of the clamping grooves 44, the upward lifting force and the pushing force to the backrest 2 are released, under the action of the resilience force of the elastic locking device 3, the backrest 2 moves downwards until the clamping piece 41 is clamped in the corresponding clamping groove 44, so that the backrest 2 and the seat body 1 are locked and fixed. The angle adjusting device can adjust the angle of the backrest 2 without a dismounting tool, has low use cost, convenient and quick adjustment of the angle of the backrest 2, time and labor conservation, good adjustment stability and strong practicability.

Specifically, the sliding grooves 43 are transversely arranged, the number of the clamping grooves 44 is set according to actual requirements, and the two adjacent clamping grooves 44 are arranged at equal angles, so that the sectional adjustment of the backrest 2 is realized; preferably, the number of the card slots 44 is two.

Specifically, joint 41 is provided with stopper 45, stopper 45 is used for conflicting joint plate 42's medial surface. The clamping piece 41 penetrates through the sliding groove 43 or the clamping groove 44 from the inner side of the clamping plate 42 and then is fixedly connected with the seat body 1, and the limiting block 45 abuts against the inner side face of the clamping plate 42; the limiting block 45 has a limiting effect on the clamping piece 41, so that the clamping piece 41 is prevented from being easily separated from the clamping plate 42; the stability of the cooperation of the clamping piece 41 and the clamping plate 42 is improved.

In this embodiment, the elastic locking device 3 includes a rotating shell 31 rotatably connected to the seat body 1, a sliding block 32 slidably connected to the rotating shell 31, and a first elastic member 33 disposed between the sliding block 32 and the rotating shell 31, wherein the sliding block 32 is connected to the bottom of the backrest 2; specifically, the sliding block 32 protrudes into the rotating shell 31, the first elastic member 33 is located in the rotating shell 31, the first elastic member 33 is a spring, one end of the spring is connected with the top end of the rotating shell 31, the other end of the spring is abutted against the top surface of the sliding block 32, and the rotating shell 31 is detachably connected with the backrest 2.

When upwards lifting and pulling back 2, back 2 drives slider 32 upwards and slides, and upwards moving back 2 drives joint board 42 upwards for joint 41 removes to the spout 43 in from draw-in groove 44, and first elastic component 33 is in the state of compressed simultaneously, makes first elastic component 33 deposit elastic potential energy, rotates shell 31 this moment and can rotate seat body 1 relatively, makes back 2 can rotate seat body 1 relatively, thereby can adjust the inclination of back 2. After the lifting force on the backrest 2 is released, the clamping member 41 is firmly clamped in one clamping groove 44 of the clamping plate 42 under the action of the resilience force of the first elastic member 33, so that the backrest 2 and the seat body 1 are locked and fixed.

Specifically, the inner wall of the rotating shell 31 is provided with a guide plate 34, the slide block 32 is provided with a guide groove 35, and the guide plate 34 is slidably connected with the guide groove 35. In the process that the sliding block 32 slides relative to the rotating shell 31, the guide plate 34 is in sliding fit with the guide groove 35, so that the sliding block 32 and the backrest 2 are guided to move upwards, the moving stability of the sliding block 32 and the backrest 2 is improved, and the sliding block 32, the backrest 2 and the rotating shell 31 are convenient to assemble.

Specifically, the rotating shell 31 is provided with a first adjusting groove 36, the backrest 2 is provided with a first connecting hole 21 communicated with the first adjusting groove 36, a stud of a bolt penetrates through the first adjusting groove 36 and then is in threaded connection with the first connecting hole 21, and a nut of the bolt is slidably arranged in the first adjusting groove 36. The bolt is limited on the backrest 2, the rotating shell 31 is prevented from being separated from the backrest 2, in the process of lifting and moving the backrest 2, the stud of the bolt relatively moves in the first adjusting groove 36, the moving range of the backrest 2 is equal to the length of the first adjusting groove 36, and in the moving process of the backrest 2, the stud of the bolt plays a limiting role, so that the backrest 2 can only move within a preset range.

Specifically, the backrest 2 is provided with a second adjusting groove 22, the rotating shell 31 is provided with a through hole 37 communicating with the first adjusting groove 36, and the seat body 1 is provided with a second connecting hole 11 communicating with the through hole 37; the rotating shell 31 is rotatably connected with the seat body 1 via a pin, and the pin sequentially penetrates through the second adjusting groove 22 and the through hole 37 and then is inserted into the second connecting hole 11. The structure is designed to enable the rotating shell 31 to rotate around the central axis of the pin; the pin connects the backrest 2, the rotating case 31 and the seat body 1 together to prevent the three from being separated, and the pin relatively moves in the second adjustment groove 22 during the movement of the backrest 2.

Specifically, back 2 is concave to be equipped with location chamber 38, fishplate bar 42 holds and locates in location chamber 38, and location chamber 38 fixes a position fishplate bar 42, and the back 2 of being convenient for and fishplate bar 42's equipment just makes back 2 and fishplate bar 42's compact structure, and connection stability is good.

In this embodiment, the bicycle connector 6 is detachably connected to the seat body 1 of the seat member 7 via a quick release structure 5, the quick release structure 5 includes a base 51 connected to the seat body 1 of the seat member 7, a quick release button 52 slidably connected to the base 51, a second elastic member 53 disposed between the quick release button 52 and the base 51, a locking member 54 slidably disposed on the base 51, and a third elastic member 55 disposed between the locking member 54 and the base 51, a sliding direction of the quick release button 52 is crossed with a sliding direction of the locking member 54, a mounting slot 511 and a through hole 512 communicating with the mounting slot 511 are disposed inside the base 51, a locking end of the locking member 54 protrudes into the mounting slot 511 via the through hole 512, the quick release button 52 is connected to a driving member 56 for driving the locking member 54 to move into or move out of the mounting slot 511, one end of the bicycle connector 6 has a clamping rod 61, the mounting groove 511 is an open groove, and the length direction of the mounting groove 511 is parallel to the sliding direction of the quick release button 52; preferably, the second elastic member 53 is disposed perpendicular to the third elastic member 55, and the quick release button 52 is disposed perpendicular to the locking member 54, and the locking member 54 is used for locking the clamping rod 61 of the bicycle connector 6 in the seat body 1.

In practical application, the base 51 is fixed at the bottom of the seat body 1; when it is desired to mount the bicycle connector 6 on the base 51, the end of the bicycle connector 6 having the catch lever 61 is inserted into the mounting slot 511 of the base 51, during the movement of the latch rod 61 in the mounting slot 511, the latch rod 61 will abut against the locking end of the locking member 54, so that the locking member 54 slides in a direction moving out of the mounting groove 511 and compresses the third elastic member 55, so that the third elastic member 55 stores elastic potential energy, when the clamping rod 61 moves to the proper position, the clamping rod 61 does not abut against the locking member 54, the locking member 54 moves in the direction of moving into the mounting slot 511 under the resilience of the third elastic member 55 until the locking member 54 is restored, at this time, the clamping rod 61 is clamped between the inner side of the locking member 54 and the inner wall of the mounting slot 511, the locking member 54 clamps the clamping rod 61, so as to realize the locking of the connector 6 in the mounting groove 511 of the base 51, thereby realizing the mounting of the seat body 1 and the bicycle connector 6; when the bicycle connector 6 needs to be detached from the mounting groove 511 of the base 51, the quick release button 52 is pressed, so that the quick release button 52 moves towards the inside of the base 51 and compresses the second elastic member 53, the second elastic member 53 stores elastic potential energy, the moving quick release button 52 drives the driving member 56 to move synchronously, the moving driving member 56 gradually drives the locking member 54 to move towards the direction moving out of the mounting groove 511 and compress the third elastic member 55, the third elastic member 55 stores elastic potential energy until the locking member 54 releases the clamping connection of the clamping connection rod 61 of the bicycle connector 6, at this time, the bicycle connector 6 is pulled out from the mounting groove 511 of the base 51, and thus the detachment of the seat body 1 and the bicycle connector 6 is realized; when the pressing force on the quick release button 52 is released, the quick release button 52 and the driving member 56 are reset by the resilient force of the second elastic member 53, and the locking member 54 is reset by the resilient force of the third elastic member 55, so that the bicycle connector 6 is mounted on the base 51 again. This simple structure and design benefit, the simple operation, labour saving and time saving can realize the quick assembly disassembly of seat body 1 and bicycle connector 6, and the dismouting cost is low.

Specifically, the driving element 56 is provided with a driving inclined plane 561, the locking element 54 is provided with a contact rod 541 which is in contact with the driving inclined plane 561, and the contact rod 541 is located above the driving inclined plane 561; preferably, an interference rod 541 protrudes from both sides of the locking member 54. Along with the reciprocating movement of the driving member 56, the driving inclined plane 561 abuts against the contact rod 541 to move up and down, and the contact rod 541 moving up and down drives the locking member 54 to move up and down, so that the driving member 56 drives the locking member 54 to move out of or into the mounting slot 511.

Specifically, the base 51 is provided with a limiting seat 57, the limiting seat 57 and the base 51 are of an integral structure, one end of the limiting seat 57 is detachably connected with a sealing cover 58, the sealing cover 58 is fixedly connected with the limiting seat 57 through a screw, the other end of the limiting seat 57 is communicated with a via hole 512, the locking member 54 is slidably connected with the limiting seat 57, the touch rod 541 protrudes out of the limiting seat 57, and the third elastic member 55 is located between the locking member 54 and the sealing cover 58. Specifically, the third elastic element 55 is a spring, and the cover 58 encloses the locking element 54 and the third elastic element 55 in the limiting seat 57. Due to the structural design, the locking piece 54 and the third elastic piece 55 can be conveniently disassembled, assembled and maintained.

Specifically, a guide groove 571 is formed in the side wall of the limiting seat 57, the contact rod 541 penetrates through the guide groove 571 and is slidably connected with the inner wall of the guide groove 571, and the sealing cover 58 covers the opening end of the guide groove 571; preferably, the number of the guide grooves 571 is two, and the two contact rods 541 are disposed in one-to-one correspondence with the two guide grooves 571. Specifically, the guide groove 571 is a U-shaped groove with an upward opening, and the contact rod 541 is a circular rod. The abutting rod 541 protrudes out of the limiting seat 57 through the guide groove 571 and abuts against the driving inclined surface 561, the length of the guide groove 571 is the maximum moving stroke of the locking member 54, in the process of the locking member 54 moving up and down, the guide groove 571 plays a role in guiding the abutting rod 541, it is ensured that the locking member 54 moves towards the fixed direction, the stability of the abutting rod 541 and the locking member 54 moving is improved, and the locking member 54 is conveniently installed in the limiting seat 57 through the cooperation of the guide groove 571 and the abutting rod 541.

Specifically, the driving member 56 is provided with an avoidance notch 562, the avoidance notch 562 is U-shaped, the open end of the driving member 56 is fixedly connected with the quick release button 52, and the closed end of the driving member 56 is limited on the base 51 by the sealing cover 58, so that the stability of the driving member 56 is improved, and the driving member 56 is prevented from being separated from the base 51; the limiting seat 57 is located in the avoiding gap 562, so that the driving member 56 and the limiting seat 57 are compact in structure, the avoiding gap 562 provides an avoiding space for the limiting seat 57, the driving member 56 and the quick release button 52 can conveniently move relative to the base 51, and the limiting seat 57 can abut against the closed end of the driving member 56 to limit the driving member 56, so that the driving member 56 and the quick release button 52 are prevented from being separated from the base 51 under the elastic force of the second elastic member 53; one end of the second elastic member 53 abuts against the quick release button 52, the other end of the second elastic member 53 abuts against the limiting seat 57, and the second elastic member 53 provides elastic force for the quick release button 52, so that the quick release button 52 automatically resets.

Specifically, the second elastic member 53 is a spring, one side of the quick release button 52, which is close to the limiting seat 57, is provided with a positioning protrusion 516, one end of the second elastic member 53 is sleeved outside the positioning protrusion 516 of the quick release button 52, and the other end of the second elastic member 53 is sleeved outside the positioning protrusion 516 of the limiting seat 57. The two ends of the second elastic part 53 are respectively positioned by the two positioning protrusions 516, so that the position precision and the stability of the second elastic part 53 are ensured, the second elastic part 53 is prevented from being separated from the limiting seat 57 or/and the quick release button 52 and failing to work normally, and the assembly among the limiting seat 57, the second elastic part 53 and the quick release button 52 is facilitated.

Specifically, the base 51 is provided with a first guide channel 513, the driving member 56 is slidably disposed in the first guide channel 513, and the structure between the base 51 and the driving member 56 is compact. During the movement of the driving member 56, the first guiding channel 513 guides the driving member 56, so as to improve the stability of the movement of the driving member 56 and the quick release button 52. Specifically, the base 51 is provided with a second guide channel 514 communicated with the first guide channel 513, the quick release button 52 is slidably arranged in the second guide channel 514, and the structure between the base 51 and the quick release button 52 is compact. During the moving process of the quick release button 52, the second guiding channel 514 guides the quick release button 52, so as to improve the moving stability of the driving member 56 and the quick release button 52.

Specifically, a limit step 515 is arranged at a connection position of the first guide channel 513 and the second guide channel 514, and the limit step 515 is used for abutting against the quick release button 52. When the quick release button 52 is pressed in place, the limiting step 515 abuts against the inner side surface of the quick release button 52 to limit the quick release button 52, so as to remind a user that the quick release button 52 is pressed in place and can pull out the bicycle connector 6, and on the other hand, the quick release button 52 is prevented from being excessively pressed, and the second elastic piece 53 is protected.

Specifically, the locking end of the locking member 54 is provided with an interference inclined surface 542 for interfering with the clamping rod 61. By adding the interference inclined plane 542, the interference inclined plane 542 plays a guiding role, so that the clamping rod 61 of the bicycle connector 6 can move towards the direction of moving out of the mounting groove 511 while interfering with the locking piece 54. Specifically, the non-locking end of the locking member 54 is recessed with a fixing hole 543, one end of the third elastic member 55 protrudes into the fixing hole 543, and the other end of the third elastic member 55 abuts against the cover 58. One end fixed mounting of third elastic component 55 is in fixed orifices 543, is convenient for install third elastic component 55, has improved the position accuracy and the job stabilization nature of third elastic component 55.

In this embodiment, a foot pedal 73 is detachably connected to each foot placing portion 72, a fixing band 71 is connected to each foot pedal 73, a plurality of clamping grooves 74 are formed in the inner wall of each foot placing portion 72, the clamping grooves 74 are arranged in the height direction of the foot placing portion 72, a clamping block 75 clamped with the clamping grooves 74 is arranged on each foot pedal 73, one end of each fixing band 71 is fixedly connected to one side of each foot pedal 73, the other end of each fixing band 71 is detachably connected to the other side of each foot pedal 73, and the clamping grooves 74 are arranged at equal intervals.

In practical application, a rider sits in the seat body 1, the lower legs of the rider are placed in the foot placing cavity of the foot placing part 72, the foot pedals 73 support the soles of the rider, and the fixing belts 71 fix the soles of the rider on the foot pedals 73, so that the lower legs of the rider can be firmly placed in the foot placing cavity, and safety performance is good. Because the lengths of the lower legs of different passengers are different, the clamping blocks 75 of the foot pedal 73 are clamped in the clamping grooves 74 at different height positions according to the lengths of the lower legs of different passengers, so that the different height positions of the foot pedal 73 in the foot placing part 72 can be adjusted, and the foot pedals 73 can support the soles of different passengers. Of course, when the pedal plate 73 is not needed, the pedal plate 73 may be directly detached from the footrest section 72. This simple structure, the height-adjustable of running-board 73 adjusts conveniently, and the suitability is good, can satisfy the person of taking of different leg lengths and use.

Specifically, a plurality of avoiding slots 76 are formed in the inner wall of the foot placing part 72, the top of each clamping groove 74 is communicated with one avoiding slot 76, and one clamping groove 74 is communicated with one avoiding slot 76 and then is a vertically arranged T-shaped groove. The avoiding slot 76 provides a avoiding space for the latch 75, so that the latch 75 can be conveniently buckled in the clamping slot 74, and the clamping of the latch 75 and the clamping slot 74 can be realized.

Specifically, the inner wall of the avoiding slot 76 is provided with a limiting elastic sheet 77, the limiting elastic sheet 77 is a plastic sheet formed by protruding downwards from the top wall of the avoiding slot 76, the limiting elastic sheet 77 is located in the avoiding slot 76, gaps are respectively formed between two sides of the limiting elastic sheet 77 and two side walls of the avoiding slot 76, and the limiting elastic sheet 77 is used for limiting the fixture block 75 in the clamping groove 74. In practical application, the fixture block 75 applies an inward pressing force to the limiting elastic sheet 77, so that the limiting elastic sheet 77 swings and elastically deforms until the fixture block 75 can be downwards buckled in the buckling groove 74 to realize the installation of the pedal plate 73, the pressing force to the limiting elastic sheet 77 is released at the moment, the limiting elastic sheet 77 is restored under the action of a resilience force and limits the fixture block 75 in the buckling groove 74, and the pedal plate 73 is prevented from being easily separated from the footrest part 72 due to the fact that the fixture block 75 is easily separated from the buckling groove 74; when the pedal plate 73 needs to be detached, pressing force is applied to the limiting elastic sheet 77, so that the limiting elastic sheet 77 swings and is elastically deformed, the pedal plate 73 is lifted upwards at the moment until the clamping block 75 of the pedal plate 73 is separated from the clamping groove 74, and the pedal plate 73 can be detached from the foot placing part 72.

Specifically, the fixing band 71 is provided with a plurality of fastening holes 78, the plurality of fastening holes 78 are arranged along the length direction of the fixing band 71, and the pedal 73 is convexly provided with a fastening button 79 fastened with the fastening holes 78. After the sole of the rider is placed in the footrest 73, the sole is fastened by the fastening holes 78 and the fasteners 79 of the fastening band 71. Because the sole size or the thickness of different person of taking is different, so can select to buckle the effective length with the knot hole 78 of different positions with button 79 lock on the fixed band 71 according to actual demand in order to adjust fixed band 71, the regulation of fixed band 71 is convenient and effective, and the practicality is strong.

Specifically, the fixing end of the fixing band 71 is provided with an insertion block 711, the pedal 73 is provided with an insertion hole 731 and a passing hole 732 communicated with the insertion hole 731, the fixing band 71 penetrates through the passing hole 732, and the insertion block 711 is inserted into the insertion hole 731. This structural design has realized that fixed band 71 and running-board 73 are split type structure, is convenient for carry out dismouting and maintenance to fixed band 71 and running-board 73, has reduced the cost of maintaining. Specifically, the cross section of the latch 75 is T-shaped, triangular, trapezoidal, or other shapes. The latch 75 with the structural design enables the latch 75 to be clamped with the clamping groove 74 more firmly.

In the embodiment, the seat body 1 of the seat part 7 is detachably connected with the front armrest 8, the front armrest 8 plays a role of a guardrail, the safety performance of the invention is improved, and the front armrest 8 is detachably connected with the seat body 1, so that the disassembly and the assembly are convenient; the tip of preceding handrail 8 is provided with first flexure strip 81, the protruding first protruding 82 of blocking that is equipped with of first flexure strip 81, seat part 7's seat body 1 is offered and is used for supplying preceding handrail 8's the first plug-in mounting hole 83 of tip male, the concave first joint recess 84 that is equipped with the protruding 82 joint of first card of inner wall in first plug-in mounting hole 83. When the front armrest 8 is assembled with the seat body 1, two ends of the front armrest 8 are respectively inserted into the two first insertion holes 83 of the seat body 1; in the process of inserting the end of the front armrest 8 into the first insertion hole 83, the inner side wall of the first insertion hole 83 abuts against the first clamping protrusion 82 on the first elastic sheet 81, so that the first elastic sheet 81 is elastically deformed, when the first clamping protrusion 82 corresponds to the first clamping groove 84, the first elastic sheet 81 rebounds, and under the action of the rebounding force, the first clamping protrusion 82 protrudes into the first clamping groove 84, so that the front armrest 8 is clamped and fixed with the seat body 1. When the front armrest 8 needs to be detached from the seat body 1, a user applies pressing force to the first elastic piece 81, so that the first elastic piece 81 is elastically deformed, the first elastic piece 81 which is elastically deformed can make the first clamping protrusion 82 move away from the first clamping groove 84, and at this time, the user can pull out the front armrest 8 from the first insertion hole 83 of the seat body 1, so that the front armrest 8 is detached. This structural design does not need extra dismouting work, and the dismouting is convenient, easy operation, labour saving and time saving.

In this embodiment, the seat body 1 of the seat member 7 is detachably connected to a carport 9, and the carport 9 can be opened or folded to shield wind, rain and light; seat element 7's seat body 1 has seted up second cartridge hole 91 and the screens groove 92 with second cartridge hole 91 intercommunication, the inner wall of second cartridge hole 91 is provided with elasticity spacing piece 93, the tip of bicycle shed 9 is provided with screens piece 94, screens piece 94 cartridge removes to screens inslot 92 behind second cartridge hole 91, elasticity spacing piece 93 is used for spacing screens piece 94 in screens groove 92. When the carport 9 is assembled with the seat body 1, the clamping block 94 at the end of the carport 9 aligns to the second insertion hole 91, the clamping block 94 is inserted into the second insertion hole 91 at the moment, so that the elastic limiting piece 93 is elastically deformed, then the carport 9 is pulled downwards, the clamping block 94 is moved into the clamping groove 92 from the second insertion hole 91, the clamping block 94 is clamped with the clamping groove 92, the carport 9 is fixedly connected with the seat body 1, and the elastic limiting piece 93 is restored to the original state at the moment so as to limit the clamping block 94 in the clamping groove 92, so that the carport 9 can be firmly assembled on the seat body 1. When the bicycle shed 9 needs to be detached from the seat body 1, a user applies pressing force to the elastic limiting piece 93, so that the elastic limiting piece 93 is elastically deformed, the user pulls the bicycle shed 9 upwards at the moment, the clamping block 94 moves into the second insertion hole 91 from the clamping groove 92, the clamping block 94 of the bicycle shed 9 can be pulled out from the second insertion hole 91 by the user, the disassembly of the bicycle shed 9 and the seat body 1 is realized, and after the disassembly, the elastic limiting piece 93 can be restored to the original shape, so that the subsequent bicycle shed 9 is assembled on the seat body 1.

Specifically, the bicycle shed 9 includes two folding gear joints 95 and a plurality of bicycle shed strips 96, the folding gear joints 95 are provided with a plurality of joint ends 90 which are rotatably connected with each other, the plurality of joint ends 90 are arranged in one-to-one correspondence with the plurality of bicycle shed strips 96, two ends of each bicycle shed strip 96 are respectively connected with one joint end 90 of the two folding gear joints 95, the bicycle shed 9 further includes a tarpaulin, and the plurality of bicycle shed strips 96 are uniformly connected with the tarpaulin; preferably, the tip of bicycle shed strip 96 is provided with second joint recess 97, joint end 90 offers the third plug-in mounting hole 98 that is used for supplying the tip male of bicycle shed strip 96, joint end 90 is provided with second flexure strip 99, the inboard projection of second flexure strip 99 has the protruding 991 of second card, the protruding 991 projection of second card is to the third plug-in mounting hole, the protruding 991 of second card is used for cooperating with second joint recess 97 joint. The disassembly and assembly modes and principles of the canopy strip 96 and the joint end 90 are the same as those of the front armrest 8 and the seat body 1, and the second clamping protrusion 991 is clamped with the second clamping groove by the elastic deformation of the second elastic sheet 99, which is not described herein again. This structural design not only makes two adjacent bicycle shed strips 96 can rotate relatively, still is convenient for bicycle shed strips 96 and the joint end 90 of closing gear joint 95 to carry out dismouting and maintenance to it washs to tear down the tarpaulin open.

In this embodiment, the rear caster set 14 includes a rear foot rest 141 detachably connected to the seat body 1 of the seat member 7, rear casters 142 rotatably connected to two bottom ends of the rear foot rest 141, and a linkage brake 143 mounted on the rear foot rest 141 and used for braking the two rear casters 142, wherein the linkage brake 143 is a pedal-type linkage brake. Specifically, the rear foot frame 141 is detachably connected to the seat body 1. The rear caster wheel group 14 is detachable from the seat body 1; the two braking ends of the linkage brake 143 are respectively connected with the two rear casters 142 in a driving manner. In practical applications, when a user steps on one braking end of the linkage brake 143, the two braking ends of the linkage brake 143 respectively brake the two rear casters 142 to realize one-step double braking; when the user steps on the other braking end of the interlocking brake 143, the two braking ends of the interlocking brake 143 release the two rear casters 142, respectively, so that the rear casters 142 can roll freely. Preferably, the linkage brake 143 may be a brake of a stroller in the related art.

In this embodiment, the front caster 13 is rotatably connected to the foot placing part 72, and a locking mechanism 16 is provided between the front caster 13 and the foot placing part 72; when the locking mechanism 16 locks the front caster 13 to the footrest 72, the front caster 13 can only roll directionally; when the locking mechanism 16 releases the lock of the front caster 13, the front caster 13 can rotate 360 °; locking mechanical system 16 sets up in locking sliding tray 161 including setting up in the locking sliding tray 161 of front caster 13, setting up in the locking hole of putting foot portion 72 and sliding the locking piece 163 that sets up in locking sliding tray 161, the lateral wall of locking sliding tray 161 is concave to be equipped with two third joint recesses 164, and two third joint recesses 164 arrange the setting along the length direction of locking sliding tray 161, locking piece 163 is provided with third flexure strip 165, the protruding third joint protruding 166 that is equipped with third joint recess 164 joint complex of third flexure strip 165, the locking end of locking piece 163 can be inserted to in the locking hole. In practical applications, when the front caster 13 needs to roll directionally, a user applies an upward pushing force to the locking member 163, the third protrusion 166 on the third elastic piece 165 is pressed by the inner wall of the locking sliding groove 161, so that the third elastic piece 165 is elastically deformed, the third protrusion 166 moves out of the bottommost third latching groove 164, the locking member 163 can slide upward relative to the locking sliding groove 161 until the third protrusion 166 moves to the highest third latching groove 164, the third elastic piece 165 rebounds, so that the third protrusion 166 protrudes into the third latching groove 164 to engage the third protrusion 166 with the third latching groove 164, and the locking end of the locking member 163 protrudes into the locking hole to lock the front caster 13 on the foot rest 72, so that the front caster 13 can roll only in a fixed direction, thereby achieving the directional movement of the present invention. When the front caster 13 is required to be capable of rotating 360 degrees, the user only needs to operate in the reverse direction, and the description is omitted.

Specifically, both ends of the push handle 15 are adjustably rotatably connected to the seat body 1 via angle-adjusting joints 17. This structural design for push away the multistage regulation of 15 can the height, be fit for the user of different heights to use. Specifically, a seat cushion 18 is provided between the seat body 1 and the seatback 2. By adding the seat cushion 18, the comfort of the rider is improved. Specifically, the seat body 1 is provided with a plurality of adjusting holes 19, the adjusting holes 19 are distributed in two rows, all the adjusting holes 19 in each row are arranged from top to bottom, and the adjusting holes 19 are used for tightening the safety belt 12 or/and adjusting the shoulder position of the safety belt 12. The seat belt 12 is threaded through the adjustment holes 19 at different height positions to tighten the seat belt 12 or/and adjust the shoulder position of the seat belt 12 to suit different height occupants.

Specifically, the bicycle connector 6 comprises a clamping rod 61, an installing head 62, a pressing piece 63 and two supporting rods 64, wherein the two supporting rods 64 are arc-shaped, the two supporting rods 64 are arranged in parallel, one ends of the two supporting rods 64 are connected through the clamping rod 61, the middle parts of the two supporting rods 64 are connected through a connecting rod 65, the other ends of the two supporting rods 64 are connected through the installing head 62, and the pressing piece 63 is used for fixedly connecting the installing head 62 with a bracket of a bicycle. In practical application, when the bracket of the bicycle is located between the two support rods 64 and the bracket is located between the mounting head 62 and the pressing plate 63, the pressing plate 63 is locked on the mounting head 62 through screws, so that one end of the bicycle connector 6 is fixedly connected with a frame of the bicycle, then one end of the bicycle connector 6 with the clamping rod 61 is inserted into the mounting groove 511 of the seat body 1 until the clamping rod 61 is clamped in the mounting groove 511 of the seat body 1 by the quick-dismounting structure 5, so that the other end of the bicycle connector 6 is fixedly connected with the seat body 1, and further the assembly of the bicycle and the bicycle is realized.

The above embodiments are preferred implementations of the present invention, and the present invention can be implemented in other ways without departing from the spirit of the present invention.

Claims

1. The utility model provides a bicycle safety seat with shallow function which characterized in that: including seat spare, set up in the cushion of seat spare, set up in the safety belt of seat spare, put foot portion, detachably connect in the bicycle connector of seat spare from two of seat spare bottom downwardly extending, connect respectively in two front truckles of putting foot portion, connect in the back foot wheelset of the bottom of seat spare and connect in the pushing away handle at the top of seat spare, two put foot portion and parallel and interval setting, bicycle connector is located two and puts between the foot portion.

2. A bicycle safety seat with stroller function according to claim 1, wherein: the seat part comprises a seat body and a backrest connected to the seat body, the safety belt is arranged between the seat body and the backrest, the bottom of the backrest is movably connected with the seat body through an elastic locking device, and the middle or the top of the backrest is clamped with the seat body through a clamping device.

3. A bicycle safety seat with stroller function according to claim 2, wherein: clamping device includes joint spare and with joint spare clearance fit's joint board, the joint board set up the spout and with two at least draw-in grooves of spout intercommunication, all draw-in grooves arrange the setting along the length direction of spout, joint spare can remove to in one of them draw-in groove along the spout.

4. A bicycle safety seat with stroller function according to claim 2, wherein: the elastic locking device comprises a rotating shell rotatably connected to the seat body, a sliding block connected with the rotating shell in a sliding mode, and a first elastic piece arranged between the sliding block and the rotating shell, and the sliding block is connected to the bottom of the backrest.

5. A bicycle safety seat with stroller function according to claim 1, wherein: the bicycle connector is connected with the seat part through the quick assembly disassembly structure, the quick assembly disassembly structure includes the base of being connected with the seat part, sliding connection in the quick detach button of base, set up second elastic component between quick detach button and base, slide and set up in the locking part of base and set up the third elastic component between locking part and base, the slip direction of quick detach button sets up with the slip direction cross of locking part, the inside of base is provided with the mounting groove and the via hole that communicates with the mounting groove, the lock solid end of locking part stretches to the mounting groove in through the via hole, the quick detach button is connected with the driving piece that is used for driving the locking part to move into or shift out the mounting groove.

6. A bicycle safety seat with stroller function according to claim 1, wherein: every is put equal detachably in the foot portion and is connected with the running-board, the running-board is connected with the fixed band, the inner wall of putting the foot portion is provided with a plurality of joint grooves, and a plurality of joint grooves arrange the setting along the direction of height of putting the foot portion, the running-board be provided with the fixture block of joint groove joint, the one end of fixed band and one side fixed connection of running-board, the other end of fixed band and the opposite side detachably of running-board are connected.

7. A bicycle safety seat with stroller function according to claim 1, wherein: seat spare detachably is connected with preceding handrail, the tip of preceding handrail is provided with first flexure strip, it is protruding that first flexure strip is protruding to be equipped with first card, seat spare is offered and is used for supplying the first cartridge hole of tip male of preceding handrail, the concave first joint recess that is equipped with the protruding joint of first card of inner wall in first cartridge hole.

8. A bicycle safety seat with stroller function according to claim 1, wherein: seat spare detachably is connected with the bicycle shed, the screens groove that second cartridge hole and with second cartridge hole intercommunication has been seted up to the seat spare, the inner wall in second cartridge hole is provided with the spacing piece of elasticity, the tip of bicycle shed is provided with the screens piece, screens piece cartridge removes to the screens inslot behind second cartridge hole, the spacing piece of elasticity is used for spacing in the screens inslot with the screens piece.

9. A bicycle safety seat with stroller function according to claim 1, wherein: the rear caster group comprises a rear foot rest connected with the seat piece, rear casters respectively rotatably connected to two bottom ends of the rear foot rest, and a linkage brake arranged on the rear foot rest and used for braking the two rear casters.

10. A bicycle safety seat with stroller function according to claim 1, wherein: preceding truckle with put foot portion and rotate and be connected, preceding truckle and put and be provided with locking mechanical system between the foot portion, locking mechanical system is including setting up in the locking sliding tray of preceding truckle, setting up in the locking hole of putting the foot portion and slide and set up the locking piece in the locking sliding tray, the lateral wall of locking sliding tray is concave to be equipped with two third joint recesses, and two third joint recesses are arranged along the length direction of locking sliding tray and are set up, the locking piece is provided with the third flexure strip, the protruding and third joint recess joint complex third card that is equipped with of third flexure strip is protruding, the locking end of locking piece can cartridge to locking downthehole.