Multi-function extension board

Abstract

The present invention discloses a multifunctional carriage, comprising a carriage body, a wheel assembly and a pushing assembly arranged at the bottom of the carriage body, wherein the pushing assembly comprises a push rod frame that can be folded along its own length direction, and a seat that can be opened or folded relative to the push rod frame, wherein the push rod frame can be relatively rotated and can be relatively slidably connected to the carriage body along the front-rear direction of the carriage body, and the carriage has a towing working state and a pushing working state, when the carriage is in the towing working state, the push rod frame is folded along the length direction and folded with the seat, and the pushing assembly is folded at the bottom of the carriage body; when the carriage is in the pushing working state, the push rod frame is unfolded along its own length direction and gradually extends upward from the back to the front, and the seat is unfolded relative to the push rod frame and is located above the carriage body. The multifunctional carriage of the present invention can be grafted on the rear of a baby carriage for towing, and can also be pushed alone for children to sit on, thereby meeting the use needs in different scenarios.

Description

Technical Field

[0001] The invention relates to the field of children's products, and in particular to a multifunctional drag board. Background Art

[0002] In the prior art, a child carrier is usually fixedly connected to the rear of a baby carriage, so that another child can stand on the rear side of the baby carriage and move forward with the baby carriage when the baby carriage is pushed. The existing child carrier has a single function and a short service life, and cannot meet the use needs in more scenarios. Summary of the invention

[0003] The purpose of the present invention is to provide a multifunctional carriage which can be connected to the rear of a baby carriage for towing and can also be converted into a stroller for independent pushing.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A multifunctional carriage, comprising a carriage body, a wheel assembly arranged at the bottom of the carriage body, the carriage further comprising a pushing assembly, the pushing assembly comprising a push rod frame that can be folded along its own length direction, and a seat that can be opened or folded relative to the push rod frame, wherein the push rod frame can both rotate relatively and be connected to the carriage body in a relatively slidable manner along the front-rear direction of the carriage body, the carriage has a towing working state and a pushing working state, when the carriage is in the towing working state, the push rod frame is folded along the length direction and folded together with the seat, and the pushing assembly is folded at the bottom of the carriage body; when the carriage is in the pushing working state, the push rod frame is unfolded along its own length direction and gradually extends upward from the back to the front, and the seat is unfolded relative to the push rod frame and is located above the carriage body.

[0006] Preferably, one end of the seat is rotatably connected to the push rod frame, and the pushing assembly also includes a support rod frame for supporting between the seat and the carriage body in the pushing working state, and when the carriage is in the pushing working state, the support rod frame is connected to the carriage body; when the carriage is in the towing working state, the support rod frame is separated from the carriage body and folded together with the push rod frame and the seat.

[0007] Preferably, the support rod frame includes an upper support rod and a lower support rod both extending in the up-down direction in the pushing working state, and the lower end of the upper support rod is detachably connected to the upper end of the lower support rod. When the carriage is in the pushing working state, the upper support rod and the lower support rod extend in the same vertical direction and are supported between the carriage body and the seat.

[0008] Preferably, the support rod frame also includes an oblique support rod, one end of the oblique support rod is rotatably connected to the seat or the push rod frame, and the other end of the oblique support rod is rotatably connected to the lower support rod. When the towing board is in the towing working state, the upper support rod and the lower support rod are detached from each other, and the upper support rod is folded at the bottom of the seat, and the lower support rod and the oblique support rod are folded together at the bottom of the seat.

[0009] Preferably, a first locking mechanism is provided between the upper support rod and the lower support rod for locking the two relative to each other, and a second locking mechanism is provided between the lower support rod and the drag plate body for locking the two relative to each other, and the first locking mechanism and the second locking mechanism are arranged to be synchronously locked and / or linkedly unlocked.

[0010] Preferably, the drag plate body is provided with a mounting hole for the lower end of the lower support rod to be inserted in a matching manner, and the drag plate body is also provided with a locking hole connected to the mounting hole, and the second locking mechanism includes a linkage slider that can be slidably arranged on the lower support rod along the length direction of the lower support rod, a locking tongue slidably arranged at the lower end of the lower support rod along the length direction perpendicular to the lower support rod, and an elastic member for providing the locking tongue with the force required to move the locking tongue away from the locking hole, a wedge-shaped surface that cooperates with each other is provided between the lower part of the linkage slider and the locking tongue, and an insertion hole is provided at the upper end of the lower support rod for the lower end of the upper support rod to be inserted in a matching manner, and when the lower end of the upper support rod is inserted in the insertion hole and the first locking mechanism is locked, the linkage slider slides downward and drives the locking tongue to be inserted in the locking hole in a matching manner.

[0011] Preferably, a guide groove extending in the front-to-back direction and used to provide a sliding guide for the push rod frame is provided at the bottom of the carriage body, one end of the push rod frame is rotatably connected to a push rod joint via a rotating shaft, and the push rod joint can be slidably connected to the carriage body along the extension direction of the guide groove, when the carriage is in the towing working state, the rotating shaft is located in the guide groove; when the carriage is in the pushing working state, the rotating shaft is located outside the guide groove.

[0012] Preferably, the push rod frame includes two push rods which are parallel to each other and spaced apart, the seat is connected between the two push rods, and when the towing board is in the towing working state, the seat is folded between the two push rods.

[0013] Preferably, the tow board further includes a tow rod, the tow rod including a tow rod end, a tow rod body having one end rotatably connected to the tow rod end via a rotating shaft, and a towing connector arranged at the other end of the tow rod body; the tow board body is provided with a receiving groove extending in the front-to-back direction and used to provide a sliding guide for the tow rod, the tow rod end is slidably arranged in the receiving groove, when the tow board is in the towing working state, the tow rod body and the rotating shaft are both located outside the receiving groove; when the tow board is in the pushing working state, the tow rod body and the rotating shaft are both located in the receiving groove.

[0014] Preferably, the wheel assembly includes a front wheel assembly arranged at the front bottom of the carriage body, and a rear wheel assembly arranged at the rear bottom of the support plate body, wherein the rear wheel assembly includes a wheel seat and a rear wheel installed at the bottom of the wheel seat, the wheel seat is rotatably connected to the carriage body via a universal shaft, a wheel seat locking mechanism is arranged between the wheel seat and the carriage body for locking the two relative to each other, when the carriage is in the towing working state, the wheel seat locking mechanism is in an unlocked state; when the carriage is in the pushing working state, the wheel seat locking mechanism is in a locked state.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the multifunctional drag board of the present invention can be connected to the rear of the baby carriage for towing, or can be used by children to sit on and be pushed alone by switching between the towing working state and the pushing working state, thereby meeting the use needs in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a three-dimensional schematic diagram of a specific embodiment of the multifunctional carriage of the present invention in a pushing working state;

[0017] Attached Figure 2 For attachment Figure 1 Side view of

[0018] Attached Figure 3 For attachment Figure 2 Sectional view along 1-1 direction;

[0019] Attached Figure 4 is a three-dimensional schematic diagram of the push rod frame of the multifunctional drag board in the folding process of the embodiment;

[0020] Attached Figure 5 For attachment Figure 4 Side view of

[0021] Attached Figure 6 For attachment Figure 5 Sectional view along 2-2 direction;

[0022] Attached Figure 7It is a three-dimensional schematic diagram of the push rod frame of the multifunctional dragging board in this embodiment when it is folded and rotated to a horizontal state;

[0023] Attached Figure 8 For attachment Figure 7 Side view of

[0024] Attached Fig. 9 For attachment Figure 8 3-3 sectional view;

[0025] Attached Fig.10 For attachment Figure 7 A top view of

[0026] Attached Fig.11 For attachment Fig.10 Middle 4-4 section view;

[0027] Attached Fig.12 For attachment Figure 7 A three-dimensional diagram from the bottom looking up;

[0028] Attached Fig.13 is a three-dimensional schematic diagram of the multifunctional dragging board in the present embodiment when it is in a towing working state;

[0029] Attached Fig.14 For attachment Fig.13 Side view of

[0030] Attached Fig.15 For attachment Fig.14 Sectional view along 5-5 axis;

[0031] Attached Fig.16 For attachment Fig.15 The enlarged schematic diagram at A in the middle;

[0032] Attached Fig.17 For attachment Fig.13 A top view of

[0033] Attached Fig.18 For attachment Fig.17 6-6 section view

[0034] Attached Fig.19 It is a three-dimensional schematic diagram of the push rod frame and the towing rod of the multifunctional towing platform in this embodiment when they are folded into the towing platform body;

[0035] Attached Fig. 20 For attachment Fig.19 Side view of

[0036] Attached Fig.21 For attachment Fig. 20 Sectional view along 7-7 direction;

[0037] Attached Fig. 22 For attachment Fig.21 The enlarged schematic diagram of point B in the middle;

[0038] Attached Fig.23 For attachment Fig.19 A top view of

[0039] Attached Fig.24 For attachment Fig.23 Sectional view along 8-8

[0040] Attached Fig.25 It is a three-dimensional schematic diagram of the multifunctional drag board in the embodiment of the present invention in a towing working state and connected to a child stroller;

[0041] Attached Fig.26 For attachment Fig.25 Side view of

[0042] Attached Fig. 27 For attachment Fig.25 A top view of

[0043] Wherein: 1. carriage body; 11. guide groove; 12. push assembly receiving chamber; 13. receiving groove; 14. push assembly locking member;

[0044] 2. wheel assembly; 21. front wheel assembly; 22. rear wheel assembly; 221. wheel seat; 222. rear wheel; 2221. wheel axle;

[0045] 3. Pushing assembly; 31. Push rod frame; 311. Push rod; 32. Seat; 331. Upper support rod; 332. Lower support rod; 333. Diagonal support rod; 351. Upper support rod lock tongue; 352. Upper support rod lock hole; 361. Insertion hole; 362. Linkage slider; 3621. Limit pin; 3622. Limit slide groove; 363. Mounting hole; 364. Lock hole; 365. Fourth elastic member; 366. Lock tongue; 3623. Wedge surface;

[0046] 4. Drag rod; 41. Sliding rod body; 411. Drag rod end; 412. Fifth elastic member; 413. First positioning lock groove; 414. Second positioning lock groove; 415. Drag rod positioning pin; 42. Drag rod body; 421. Rotating shaft; 43. Drag connecting piece;

[0047] 5. Wheel seat locking mechanism; 511. Lock pin; 512. Lock groove; 513. First elastic member; 521. Mounting slider; 522. Pushing inclined surface; 523. Second elastic member; 531. Driving slider; 532. Driving inclined surface; 533. Third elastic member;

[0048] 6. Child stroller; 61. Stroller frame; 611. Rear support; 612; Rear cross bar; 62. Stroller front wheel; 63. Stroller rear wheel. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] The following descriptions of up and down, front and back, left and right, inside and outside, etc. are all defined with reference to the directions observed when a child is sitting or standing on the carriage.

[0051] like Figure 1 A multifunctional carriage shown in the figure comprises a carriage body 1, a wheel assembly 2 arranged at the bottom of the carriage body 1, wherein the wheel assembly 2 specifically comprises a front wheel assembly 21 arranged at the front bottom of the carriage body 1 and a rear wheel assembly 22 arranged at the rear bottom of the carriage body 1, wherein the rear wheel assembly 22 comprises a wheel seat 221 rotatably connected to the bottom of the carriage body 1 via a universal shaft (not shown in the figure), and a rear wheel 222 rotatably connected to the bottom of the wheel seat 221 via a wheel axle 2221. In the present embodiment, the front wheel assembly 21 and the rear wheel assembly 22 are each provided with two groups, and the structure of the front wheel assembly 21 is the same as that of the rear wheel assembly 22.

[0052] like Figure 1 As shown, the above-mentioned carriage further includes a pushing assembly 3 disposed at the rear of the carriage body 1, and the pushing assembly 3 includes a push rod frame 31 that can be unfolded and folded along its length direction, and a seat 32 that can be opened or folded relative to the push rod frame 31. In this embodiment, the push rod frame 31 includes two push rods 311 that are parallel to each other and spaced apart, the seat 31 is connected between the two push rods 311, and the rear end of the seat 32 is rotatably connected to the push rod frame 31, and the push rod frame 31 can be relatively rotatable and relatively slidably connected to the carriage body 1 along the front-rear direction of the carriage body 1.

[0053] like Fig.13 and Fig.18 As shown, the above-mentioned carriage further includes a towing rod 4 arranged at the front of the carriage body 1, the towing rod 4 includes a towing rod body 42 of the front section and a sliding rod body 41 of the rear section, the towing rod body 42 and the sliding rod body 41 are rotatably connected through a rotating shaft 421, a towing connecting piece 43 is provided at the front end of the towing rod body 42, and a towing rod end 411 is provided at the rear end of the sliding rod body 41, and a receiving groove 13 extending in the front-to-back direction and used to provide a sliding guide for the towing rod 4 is provided on the carriage body 1, and the sliding rod body 41 is slidably arranged in the receiving groove 13. The towing rod 4 has an open state in which the towing rod body 42 and the rotating shaft 421 are both extended out of the receiving groove 13, and a retracted state in which the towing rod body 42 and the rotating shaft 421 are both located in the receiving groove 13.

[0054] like Figure 1 and Fig.13 As shown, the multifunctional trailer has a towing working state and a pushing working state. Figure 1As shown, when the platform is in the pushing working state, the push rod frame 31 is unfolded along its own length direction and gradually extends upward from the back to the front, the seat 32 is unfolded relative to the push rod frame 31 and is located above the platform body 1, and the towing rod 4 is in the retracted state. In this state, the child can sit on the seat 32 and the adult can push the platform from the back. Fig.13 As shown, when the carriage is in the towing working state, the push rod frame 31 is folded along the length direction and folded together with the seat 32, the seat 32 is folded between the two push rods 311, and the pushing assembly 3 is folded at the bottom of the carriage body 1. At this time, the tow rod 4 is in the open state, and the tow rod body 42 can rotate around the rotation axis 421, so that the towing connector 43 can be hooked on the child stroller rods at different heights. In this state, the child can stand on the carriage body 1, and the adult pushes the child stroller to drive the child forward.

[0055] like Figure 25 to Figure 27 The figure shows a specific embodiment of the towing platform in the towing working state, a child stroller 6, comprising a stroller frame 61, a stroller front wheel 62 arranged at the front bottom of the stroller frame 61, and a stroller rear wheel 63 arranged at the rear bottom of the stroller frame 61. The stroller frame 61 comprises two left and right groups of rear brackets 611, both of which are connected to the rear wheels 63 at the bottom, and a rear cross bar 612 connected between the left and right groups of rear brackets 611. The towing platform in the towing working state is grafted to the rear of the child stroller 6 by hooking the towing connector 43 on the rear cross bar 612, thereby realizing its towing function.

[0056] like Figure 1 As shown, the pushing assembly 3 also includes a support rod frame for supporting between the seat 32 and the carriage body 1 in the pushing working state, and the support rod frame includes an upper support rod 331, a lower support rod 332 and an oblique support rod 333. Figure 1 and Figure 2 As shown, in the pushing working state, the support rod frame is connected to the carriage body 1, the upper support rod 331 and the lower support rod 332 extend in the same vertical direction and are supported between the carriage body 1 and the seat 32, the lower end of the upper support rod 331 and the upper end of the lower support rod 332 are detachably connected, the upper end of the oblique support rod 333 is rotatably connected to the push rod frame 31, and the lower end is rotatably connected to the lower support rod 332. Figures 4 to 12 As shown, when the carriage is switched from the pushing working state to the towing working state, the support rod frame is separated from the support plate body 1 and is folded together with the push rod frame 31 and the seat 32, the upper support rod 331 and the lower support rod 332 are detached from each other, and the upper support rod 331 is folded at the bottom of the seat 32, and the lower support rod 332 and the diagonal support rod 333 are folded together at the bottom of the seat 32.

[0057] like Figure 3 and Figure 6As shown, a first locking mechanism is provided between the upper support rod 331 and the lower support rod 332 for relative locking of the two, and a second locking mechanism is provided between the lower support rod 332 and the carriage body 1 for relative locking of the two, and the first locking mechanism and the second locking mechanism are arranged to be synchronously locked and linkedly unlocked.

[0058] like Figure 3 and Figure 6 As shown, the upper end of the lower support rod 332 is provided with an insertion hole 361 for the lower end of the upper support rod 331 to be inserted in cooperation, and the first locking mechanism includes an upper support rod locking tongue 351 which is slidably arranged at the lower part of the upper support rod 331 perpendicular to the length direction of the upper support rod 331, an upper support rod locking hole 352 opened on the insertion hole 361 for the upper support rod locking tongue 351 to be inserted in cooperation, and an elastic member (not shown in the figure) for providing the upper support rod locking tongue 351 with the required force to move toward the upper support rod locking hole 352.

[0059] like Figure 3 and Figure 6 As shown, the carriage body 1 is provided with a mounting hole 363 for the lower end of the lower support rod 332 to be inserted in a matching manner, and the carriage body 1 is also provided with a locking hole 364 that is connected to the mounting hole 363. The second locking mechanism includes a linkage slider 362 that can be slidably provided on the lower support rod 332 along the length direction of the lower support rod 332, a locking tongue 366 that is slidably provided at the lower end of the lower support rod 332 along the length direction perpendicular to the lower support rod 332, and an elastic member, specifically a fourth elastic member 365, for providing the locking tongue 366 with the force required to move away from the locking hole 364. A wedge-shaped surface 3623 that cooperates with each other is provided between the lower part of the linkage slider 362 and the locking tongue 366.

[0060] like Figure 3 As shown, when the lower end of the upper support rod 331 is inserted into the insertion hole 361, the linkage slider 362 is pushed to slide downward, and the locking tongue 366 is driven to be inserted into the locking hole 364 in a cooperative manner. When the upper support rod 33 is inserted into the insertion hole 361, the upper support rod locking tongue 351 is inserted into the upper support rod locking hole 352 in a cooperative manner, and the first locking mechanism is locked. At this time, the locking tongue 366 is also correspondingly inserted into the locking hole 364 to lock the second locking mechanism, thereby achieving synchronous locking between the first locking mechanism and the second locking mechanism. Similarly, if Figure 6 As shown, when the lower end of the upper support rod 331 disengages from the insertion hole 361 after the first locking mechanism is unlocked, the lock tongue 366 disengages from the lock hole 364 under the action of the fourth elastic member 365, so that the second locking mechanism is unlocked, thereby realizing the linkage unlocking of the second locking mechanism and the first locking mechanism.

[0061] In addition, if Figure 3 and Figure 6As shown, in this embodiment, the linkage slider 362 is also provided with a limit slot 3622 extending along its own length direction, and a limit pin 3621 is fixed on the lower support rod 332. The limit pin 3621 is cooperatively inserted in the limit slot 3622 to limit the linkage slider 362 from detaching from the lower support rod 332 when sliding up and down.

[0062] like Fig. 9 As shown, the bottom of the carriage body 1 is provided with a guide groove 11 extending in the front-to-back direction and used to provide a sliding guide for the push rod frame 31. The lower end of the push rod frame 31 is rotatably connected to a push rod joint (not shown in the figure) via a rotating shaft (not shown in the figure). The push rod joint can be slidably connected to the carriage body 1 along the extension direction of the guide groove 11. When the carriage is in the towing working state, the rotating shaft is located in the guide groove 11; when the carriage is in the pushing working state, the rotating shaft is located outside the guide groove 11, and the push rod frame 31 can rotate around the rotating shaft. The connection relationship and rotation principle between the push rod frame 31 and the carriage body 1 are similar to those of the towing rod 4, and will not be repeated here. Figures 9 to 12 As shown, the bottom of the carriage body 1 is further provided with a pushing assembly receiving chamber 12 for accommodating the pushing assembly 3 when the carriage is in the towing working state, and a pushing assembly locking member 14 for locking the pushing assembly 3 .

[0063] like Fig.15 , Fig.16 , Fig.21 and Fig. 22 As shown, the towing bar 4 is located between the two groups of rear wheel assemblies 22 in the left-right direction, and a wheel seat locking mechanism 5 is provided between the wheel seat 221 and the carriage body 1 for locking the two relative to each other. When the carriage is in the towing working state, the wheel seat locking mechanism 5 is in the unlocked state, and both the front wheel assembly 21 and the rear wheel assembly 22 can rotate in all directions; when the carriage is in the pushing working state, the wheel seat locking mechanism 5 is in the locked state, and the wheel seat 221 of the rear wheel assembly 22 cannot rotate in all directions relative to the carriage body 1, and only the front wheel assembly 21 has the function of universal rotation, so as to facilitate turning when pushing the carriage. When the towing bar 4 is switched from the open state to the retracted state, the wheel seat locking mechanism 5 is driven to switch from the unlocked state to the locked state.

[0064] like Fig.15 , Fig.16 , Fig.21 and Fig. 22As shown, the wheel seat locking mechanism 5 includes a sliding assembly relatively slidably arranged on the carriage body 1 in the up-down direction, a first elastic member 513 for providing the force required for the sliding assembly to slide upward, and a driving slider 531 slidably arranged on the carriage body 1. The sliding assembly includes a locking pin 511 extending in the up-down direction, a mounting slider 521 slidably arranged on the carriage body 1 in the up-down direction, the axis of the locking pin 511 is parallel to the axis of the universal shaft, a locking groove 512 for cooperating with the locking pin 511 is arranged on the wheel seat 221, the locking pin 511 is slidably arranged on the mounting slider 521 in the up-down direction, and a second elastic member 523 for driving the locking pin 511 to move downward is further arranged between the mounting slider 521 and the locking pin 511.

[0065] like Fig.15 , Fig.16 , Fig.21 and Fig. 22 As shown, the sliding direction of the driving slider 531 is perpendicular to the sliding direction of the mounting slider 521 and the sliding direction of the drag rod 4 relative to the carriage body 1. Specifically, the driving slider 531 slides in the left-right direction. The upper end of the mounting slider 521 is provided with a push-up inclined surface 522, and the outer end of the driving slider 531 is provided with a driving inclined surface 532. The push-up inclined surface 522 and the driving inclined surface 532 are in contact with each other. A third elastic member 533 is further provided between the carriage body 1 and the driving slider 531 to provide the required force for driving the driving slider 531 to move away from the mounting slider 521.

[0066] like Fig.16 and Fig.18 As shown, when the tow bar 4 is in the open state, the tow bar end 411 is located in the middle of the receiving groove 13, the inner end of the driving slider 531 is separated from the tow bar 4, the locking pin 511 is disengaged from the locking groove 512, and the wheel seat locking mechanism 5 is in the unlocked state; Fig. 22 and Fig.24 As shown, when the tow bar 4 is converted to the folded state, the tow bar end 411 moves from front to rear to the rear end of the receiving groove 13, the tow bar end 411 abuts against the inner end of the driving slider 531, and pushes the driving slider 531 to move toward the installation slider 521, thereby pressing down the locking pin 511, and when the wheel seat 221 rotates so that the position of the locking pin 511 corresponds to the position of the locking groove 512, under the action of the second elastic member 523, the locking pin 511 is cooperatively inserted into the locking groove 512, and the wheel seat locking mechanism 5 is locked in linkage.

[0067] like Fig.18 and Fig.24As shown, the bottom of the receiving groove 13 is provided with a first positioning lock groove 413 and a second positioning lock groove 414 at intervals along the sliding direction of the drag rod 4, and the first positioning lock groove 413 is located in front of the second positioning lock groove 414. The drag rod end 411 is provided with a drag rod positioning pin shaft 415 that can slide in the up and down direction, and a fifth elastic member 412 for driving the drag rod positioning pin shaft 415 to move toward the first positioning lock groove 413 or the second positioning lock groove 414. When the drag rod 4 is in the open state, the drag rod positioning pin shaft 415 is cooperatively inserted in the first positioning lock groove 413; when the drag rod 4 is in the retracted state, the drag rod positioning pin shaft 415 is cooperatively inserted in the second positioning lock groove 414. The drag rod 4 is also provided with an unlocking device for allowing the drag rod positioning pin shaft 415 to exit the first positioning lock groove 413 or the second positioning lock groove 414, which can specifically adopt the existing technology.

[0068] The specific steps of using the multifunctional extension board of this embodiment are as follows:

[0069] like Fig.19 When the multifunctional carriage is to be switched to the pushing state, the pushing assembly locking member 14 is first unlocked, and then the pushing assembly 3 is pulled out backwards. Figure 7 As shown, the rotation axis of the push rod frame 31 extends out of the guide groove 11, and then the push rod frame 31 is rotated upward to unfold the seat 32 and the support rod frame as shown in FIG. Figure 4 As shown, the first locking mechanism and the second locking mechanism are locked synchronously, and finally the push rod frame 31 is unfolded along its own length direction, and the carriage is converted to Figure 1 The promotion working status is shown.

[0070] like Fig.19 When the multifunctional carriage is to be switched to the towing state, the towing rod positioning pin 415 is first unlocked, and then the towing rod 4 is pulled forward to the open state, and the carriage is switched to the towing state. Fig.13 The towing working state shown in the figure can Fig.25 It is shown grafted onto strollers 6 at different heights.

[0071] When the multifunctional carriage is not needed, the above steps can be reversed to store the pushing assembly 3 and the towing rod 4 into the carriage body 1. Fig.19 As shown, the overall volume of the carriage is greatly reduced, making it easy to store and carry.

[0072] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional carriage, comprising a carriage body and a wheel assembly disposed at the bottom of the carriage body, characterized in that: The carriage further comprises a pushing assembly, the pushing assembly comprising a push rod frame that can be folded along its own length direction, and a seat that can be opened or folded relative to the push rod frame, wherein the push rod frame can both rotate relatively and be connected to the carriage body by relative sliding along the front-rear direction of the carriage body, the carriage has a towing working state and a pushing working state, when the carriage is in the towing working state, the push rod frame is folded along the length direction and folded together with the seat, and the pushing assembly is folded at the bottom of the carriage body; when the carriage is in the pushing working state, the push rod frame is unfolded along its own length direction and gradually extends upward from the back to the front, the seat is unfolded relative to the push rod frame and is located above the carriage body, Among them, one end of the seat is rotatably connected to the push rod frame, and the pushing assembly also includes a support rod frame for supporting between the seat and the carriage body in the pushing working state. When the carriage is in the pushing working state, the support rod frame is connected to the carriage body; when the carriage is in the towing working state, the support rod frame is separated from the carriage body and folded together with the push rod frame and the seat.

2. The multifunctional drag platform according to claim 1, characterized in that: The support rod frame includes an upper support rod and a lower support rod both extending in the up-down direction in the pushing working state, and the lower end of the upper support rod is detachably connected to the upper end of the lower support rod. When the carriage is in the pushing working state, the upper support rod and the lower support rod extend in the same vertical direction and are supported between the carriage body and the seat.

3. The multifunctional drag platform according to claim 2, characterized in that: The support rod frame also includes an oblique support rod, one end of which is rotatably connected to the seat or the push rod frame, and the other end of the oblique support rod is rotatably connected to the lower support rod. When the towing board is in the towing working state, the upper support rod and the lower support rod are detached from each other, and the upper support rod is folded at the bottom of the seat, and the lower support rod and the oblique support rod are folded together at the bottom of the seat.

4. The multifunctional drag platform according to claim 2, characterized in that: A first locking mechanism is provided between the upper support rod and the lower support rod for locking the two relative to each other, and a second locking mechanism is provided between the lower support rod and the carriage body for locking the two relative to each other. The first locking mechanism and the second locking mechanism are arranged to be synchronously locked and / or linkedly unlocked.

5. The multifunctional drag platform according to claim 4, characterized in that: The sliding plate body is provided with a mounting hole for the lower end of the lower support rod to be inserted in cooperation, and the sliding plate body is also provided with a locking hole connected to the mounting hole, and the second locking mechanism includes a linkage slider that can be slidably arranged on the lower support rod along the length direction of the lower support rod, a locking tongue slidably arranged at the lower end of the lower support rod along the length direction perpendicular to the lower support rod, and an elastic member for providing the locking tongue with the force required to move the locking tongue away from the locking hole, and a wedge-shaped surface that cooperates with each other is provided between the lower part of the linkage slider and the locking tongue, and an insertion hole is provided at the upper end of the lower support rod for the lower end of the upper support rod to be inserted in cooperation, and when the lower end of the upper support rod is inserted in the insertion hole and the first locking mechanism is locked, the linkage slider slides downward and drives the locking tongue to be inserted in cooperation in the locking hole.

6. The multifunctional extension board according to claim 1, characterized in that: A guide groove extending in the front-to-back direction and used to provide a sliding guide for the push rod frame is provided at the bottom of the carriage body. One end of the push rod frame is rotatably connected to a push rod joint via a rotating shaft. The push rod joint can be slidably connected to the carriage body along the extension direction of the guide groove. When the carriage is in the towing working state, the rotating shaft is located in the guide groove; when the carriage is in the pushing working state, the rotating shaft is located outside the guide groove.

7. The multifunctional drag platform according to claim 6, characterized in that: The push rod frame comprises two push rods which are parallel to each other and spaced apart, the seat is connected between the two push rods, and when the towing board is in the towing working state, the seat is folded between the two push rods.

8. The multifunctional extension board according to any one of claims 1 to 7, characterized in that: The tow board also includes a tow rod, which includes a tow rod end, a tow rod body whose one end is rotatably connected to the tow rod end via a rotating shaft, and a towing connecting piece arranged at the other end of the tow rod body. The tow board body is provided with a receiving groove extending in the front-to-back direction and used to provide a sliding guide for the tow rod. The tow rod end is slidably arranged in the receiving groove. When the tow board is in the towing working state, the tow rod body and the rotating shaft are both located outside the receiving groove; when the tow board is in the pushing working state, the tow rod body and the rotating shaft are both located in the receiving groove.

9. The multifunctional drag platform according to claim 8, characterized in that: The wheel assembly includes a front wheel assembly arranged at the front bottom of the carriage body and a rear wheel assembly arranged at the rear bottom of the carriage body, wherein the rear wheel assembly includes a wheel seat and a rear wheel installed at the bottom of the wheel seat, the wheel seat is rotatably connected to the carriage body via a universal shaft, a wheel seat locking mechanism is arranged between the wheel seat and the carriage body for locking the two relative to each other, when the carriage is in the towing working state, the wheel seat locking mechanism is in an unlocked state; when the carriage is in the pushing working state, the wheel seat locking mechanism is in a locked state.

Images