CN214356472U - Children's transport carrier - Google Patents

Abstract

The application discloses a child transport vehicle, which comprises an upper frame, a lower frame, two folding units and a release device, wherein the upper frame is provided with a front end and a rear end and limits the upper limit of a cabin, the lower frame limits the lower limit of the cabin, the front end of the upper frame is pivotally connected to the lower frame, each folding unit comprises a first rod piece and a second rod piece which are respectively pivotally connected to the upper frame and the lower frame, the first rod piece and the second rod piece are rotatably connected, so that the folding units can be folded from an extending position to a folding position and further the upper frame is allowed to rotate towards the lower frame, each folding unit is provided with a locking device which enables the folding units to be kept in the extending position, the release device is arranged between the two folding units, and the operation of the release device can simultaneously unlock the two locking devices. The whole frame surrounds the cabin, the structural strength is high, and the folding unit is provided with a locking device, so that the safety during driving is improved.

Description

Children's transport carrier

Technical Field

The application relates to the field of bicycle trailers, in particular to a foldable child transportation carrier.

Background

A bicycle trailer is a vehicle that is towed at the rear of a bicycle for children to sit or carry items. The existing bicycle trailer is convenient to carry, and the frame can be folded. For example, chinese patent publication No. CN 1923603 discloses a child trailer, in which folding of the entire vehicle is completed by folding of a vertical rod rotatably connected to a bottom frame, the overall structural strength is weak, and there is a potential safety hazard when the bicycle is dragged.

Also, for example, chinese patent publication No. CN 203864747U discloses a novel foldable child stroller, in which the rear canopy tube is fixed by fastening members, and is easily loosened during the towing process, so that the frame may shake and deform violently, thereby threatening the life safety of the child.

SUMMERY OF THE UTILITY MODEL

The application provides a folding children transport carrier has solved the problem that current folding bicycle trailer's structural strength is low.

A child transporter, comprising:

an upper frame having a front end and a rear end and defining an upper limit of the cabin;

a lower frame defining a lower limit of the cabin, a front end of the upper frame being pivotably connected to the lower frame;

two folding units, each folding unit comprising a first bar and a second bar pivotally connected to said upper frame and lower frame, respectively, said first bar and second bar being pivotally connected such that the folding units can be folded from an extended position to a folded position, thereby allowing the upper frame to rotate towards the lower frame, each folding unit being provided with locking means for keeping it in the extended position;

the unlocking device is arranged between the two folding units, and can be operated to unlock the two locking devices simultaneously.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the first rod and the second rod are partially overlapped, and the locking device includes a U-shaped connecting buckle disposed on one of the first rod and the second rod and engaged with the other one of the first rod and the second rod, a pin hole disposed on the connecting buckle, a lock pin passing through the pin hole to prevent the other one of the first rod and the second rod from disengaging from the connecting buckle, and a first reset member acting on the lock pin.

Optionally, the lock release device includes a hollow cross bar with two connecting buckles connected at the end thereof, the lock pin is slidably mounted inside the cross bar, and an unlocking sleeve capable of relatively rotating to drive the lock pin to exit from the pin hole is sleeved outside the cross bar.

Optionally, a transmission rod is arranged between the unlocking sleeve and each of the two lock pins, a mutually matched inclined surface is arranged between the outer circumferential surface of one end of the transmission rod and the inner circumferential surface of the unlocking sleeve to drive the two transmission rods to move in opposite directions, the other end of the transmission rod is connected with the lock pins, and a second reset piece acting on the transmission rods is arranged between the two transmission rods.

Optionally, a counterbore for accommodating the lock pin and the first reset piece is arranged at the end of the transmission rod, two ends of the first reset piece are respectively abutted against the bottom surface of the counterbore and the lock pin, the lock pin is connected with the transmission rod through a radial fixing pin, and a waist-shaped hole in sliding fit with the fixing pin is arranged on the side wall of the counterbore.

Optionally, the unlocking sleeve is provided with a handle for lifting the child carrier in a folded state.

Optionally, be provided with two locks on the handle, two locks locate the button of handle tip, with the button interlock can follow the two lockpins that the horizontal pole axial slided and act on the third piece that resets of button, the fixed stop collar that is provided with its axial displacement of restriction in unblock sleeve pipe both ends, the inboard of stop collar is provided with and twice lockpin matched with locking groove.

Optionally, a connecting sleeve matched with the end of the cross rod is arranged on the connecting buckle.

Optionally, the lower frame is connected with a towing bar.

Optionally, a foldable handle bar is arranged at the rear end of the upper frame.

The utility model provides a children's transport carrier is enclosed by last frame and underframe, and frame construction intensity is high, and is provided with first member and second member locking device, prevents to go the in-process separation, leads to the unexpected folding condition of frame to take place.

Drawings

FIG. 1 is a perspective view of a child transport vehicle according to an embodiment of the present application;

FIG. 2 is a front view of the child transport vehicle of the present application;

FIG. 3 is a schematic view of the folding of the handlebar of the child transport vehicle of the present application;

FIG. 4 is another state diagram of FIG. 2;

FIG. 5 is another state diagram of FIG. 2;

FIG. 6 is another state diagram of FIG. 1;

FIG. 7 is a schematic view of the child transport vehicle shown in a locked state with the folding unit;

FIG. 8 is a schematic view of the child transport vehicle shown in the unlocked position;

FIG. 9 is a schematic view of the child transport vehicle shown in a locked state with the folding unit;

FIG. 10 is a schematic view of a handle of the child transport vehicle of the present application in a rotated state;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 10;

FIG. 12 is a perspective view of FIG. 10;

fig. 13 is another state diagram of fig. 12.

The reference numerals in the figures are illustrated as follows:

1. a lower frame; 10. a reinforcing bar; 11. a rear wheel; 12. a front wheel;

2. an upper frame; 20. a handle bar;

3. a folding unit; 31. a first bar member; 32. a second bar member;

33. a connecting buckle; 330. a pin hole; 331. a lock pin; 332. a first reset member; 333. a fixing pin; 334. connecting sleeves;

34. a cross bar; 340. a transmission rod; 341. a second reset member; 342. a bolt; 343. a protrusion; 344. a counter bore;

345. a kidney-shaped hole;

35. unlocking the sleeve; 350. a groove; 351. a handle; 352. a button; 353. a third reset member; 354. a limiting sleeve;

355. a locking groove;

5. a towing rod.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any particular order or number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

As shown in fig. 1 to 6, the present application provides a child transportation vehicle, which includes an upper frame 2, a lower frame 1, two folding units 3, and a lock releasing device disposed between the two folding units 3. The upper frame 2 has a front end and a rear end and defines an upper limit of the cabin, the lower frame 1 defines a lower limit of the cabin, and the front end of the upper frame 2 is pivotably connected to the lower frame 1. Each folding unit 3 comprises a first bar 31 and a second bar 32 pivotably connected to the upper frame 2 and the lower frame 1, respectively, the first bar 31 and the second bar 32 being rotatably connected so that the folding unit 3 can be folded from an extended position to a folded position, thereby allowing the upper frame 2 to rotate towards the lower frame 1, each folding unit 3 being provided with locking means for keeping it in the extended position.

Referring to fig. 1 and 2, the child transportation vehicle of the present embodiment has at least three wheels connected and fixed thereto, wherein two rear wheels 11 are symmetrically connected to two sides of the lower frame 1 to keep the balance of the child transportation vehicle. The front wheel 12 is one, and is detachably attached to the front end center portion of the lower frame 1. The lower frame 1 is a rectangular frame, the front end and the rear end are folded, a reinforcing rod 10 for increasing the structural strength is connected in the frame, and a cushion (not shown) for children to sit is arranged on the reinforcing rod 10. The upper frame 2 is arc-shaped, and is pivoted with the lower frame 1 and the two folding units 3 to form a cabin for accommodating children or articles, and a cloth cover (not shown) is sleeved outside the cabin to play the roles of wind prevention and rain prevention.

The two folding units 3 are symmetrically pivoted between the upper frame 2 and the lower frame 1, and the frame in a stretching state is of a triangular structure when viewed from the side, so that the overall structural strength of the frame is improved. The first link 31 is hinged at the rear end of the lower frame 1, and the second link 32 has one end hinged at the middle of the first link 31 and the other end hinged near the rear end of the upper frame 2. By means of the rotation of the first and second levers 31 and 32, the upper frame 2 is pulled to rotate closer to or farther from the lower frame 1, completing the folding or unfolding operation. The two folding units 3 have the following by means of locking means:

in the locked state, the first rod 31 and the second rod 32 cannot rotate relatively, and the frame is in the extended state;

when the locking state is released, the first rod 31 and the second rod 32 can rotate relatively, and the frame can be folded.

The locking device ensures that the folding unit 3 cannot be separated accidentally in the running state, and the product safety is improved.

The unlocking device can unlock the two folding units 3 from the locking state into the unlocking state at the same time, so that quick unlocking is realized, and the operation is convenient.

As shown in fig. 7 to 11, in one embodiment, the first rod 31 and the second rod 32 are partially overlapped, and the locking device includes a U-shaped connecting buckle 33 disposed on one of the first rod 31 and the second rod 32 and engaged with the other, a pin hole 330 disposed on the connecting buckle 33, a locking pin 331 passing through the pin hole 330 and preventing the other from being disengaged from the connecting buckle 33, and a first reset member 332 acting on the locking pin 331.

The connecting buckle 33 is connected to the top of the first rod piece 31 through a bolt, and the overlapping parts of the second rod piece 32 and the first rod piece 31 after clamping and locking abut against each other, so that the connecting strength of the frame in the stretching state is improved. The pin hole 330 is formed in the side surface of the connecting buckle 33, and correspondingly, the second rod 32 is provided with a through hole which is concentric with the pin hole 330 and is matched with the locking pin 331, so that the locking pin 331 can conveniently penetrate through the pin hole 330 and extend into the second rod 32 to realize locking. The first returning member 332 is a spring, and drives the locking pin 331 to always extend into the second rod 32, so that the second rod 32 and the first rod 31 are in a locked state.

As shown in fig. 7 to 13, in one embodiment, the unlocking device includes a hollow cross bar 34 with two connecting buckles 33 connected at the ends, a lock pin 331 is slidably mounted inside the cross bar 34, and an unlocking sleeve 35 which can relatively rotate to drive the lock pin 331 to exit from the pin hole 330 is sleeved outside the cross bar 34.

The cross rod 34 is a hollow round rod, and two ends of the cross rod are connected to the connecting buckles 33 through bolts to serve as folding units 3 which are connected with two sides in a reinforcing mode, so that the structural strength of the frame is improved.

The unlocking sleeve 35 is arranged in the middle of the cross bar 34 and is mutually linked with the lock pins 331 through a transmission piece, the unlocking sleeve 35 rotates around the axis of the cross bar 34, the transmission piece drives the lock pins 331 to exit/penetrate the pin holes 330, the lock pins 331 on two sides are unlocked/locked at the same time, and operation is convenient.

In one embodiment, a transmission rod 340 is disposed between the unlocking sleeve 35 and the two lock pins 331, a mutually matched inclined surface is disposed between an outer circumferential surface of one end of the transmission rod 340 and an inner circumferential surface of the unlocking sleeve 35 to drive the two transmission rods 340 to move towards each other, the other end of the transmission rod 340 is connected with the lock pins 331, and a second reset member 341 acting on the two transmission rods 340 is disposed between the two transmission rods 340.

The transmission rod 340 is a round rod piece, is sleeved in the cross rod 34 in a sliding mode, and is fixedly connected with the lock pin 331, so that the lock pin 331 and the transmission rod 340 synchronously slide in the same direction, and the lock pin 331 is unlocked and locked by the unlocking sleeve 35. The second restoring member 341 is a spring or other elastic member, and two ends of the second restoring member respectively abut against between the two transmission rods 340. During the locking operation, only the unlocking sleeve 35 needs to be released, and the transmission rod 340 is urged to slide towards the lock pin 331 by the elasticity of the second reset piece 341, so as to complete the locking, thereby facilitating the operation.

Referring to fig. 12 and 13, the drive link 340 is restrained from sliding axially along the cross bar by a latch 342 extending through the cross bar 34 and the drive link 340. The outer surface of one end of the transmission rod 340, which is far away from the lock pin 331, is provided with a protrusion 343 with an inclined surface, the inside of the unlocking sleeve 35 is concavely provided with a groove 350 matched with the protrusion 343, when the unlocking sleeve 35 rotates, the groove 350 rotates immediately, the protrusion 343 matched with the groove slides axially through the inclined surface, and then the lock pin 331 is driven to exit the pin hole 330.

As shown in fig. 9 and 11, in one embodiment, the end of the driving rod 340 is provided with a counterbore 344 for accommodating the lock pin 331 and the first restoring member 332, two ends of the first restoring member 332 respectively abut against the bottom surface of the counterbore 344 and the lock pin 331, the lock pin 331 is connected with the driving rod 340 through a radial fixing pin 333, and the side wall of the counterbore 344 is provided with a kidney-shaped hole 345 slidably fitted with the fixing pin 333.

The counter bore 344 is formed by injection molding, and plays a role in guiding the lock pin 331 and the first reset piece 332 in a sliding manner, the fixing pin 333 penetrates through the kidney-shaped hole 345 and the lock pin 331, and the lock pin 331 and the transmission rod 340 are relatively fixed by matching with the first reset piece 332, so that the lock pin 331 and the transmission rod 340 can slide synchronously in the same direction, and the unlocking operation is facilitated. The fixing pin 333 can slide in the kidney-shaped hole 345, when the second rod piece 32 is not installed in place, the lock pin 331 abuts against the second rod piece 32, the first resetting piece 332 and the fixing pin 333 play a role in buffering to protect the lock pin 331, and after the second rod piece 32 is installed in place, the first resetting piece 332 abuts against and extends into the second rod piece 32 to complete locking.

In one embodiment, the unlocking sleeve 35 is provided with a handle 351 for lifting the child carrier in a folded state. The handle 351 is integrally injection molded from the unlocking sleeve 35. In folded state, the handle 351 is lifted up by the person rotating, and the folding unit 3 is driven to extend, so that the lifting operation is convenient. Meanwhile, the locking device is in a locking release state, so that the subsequent second rod piece 32 can be conveniently and directly clamped and locked. When the lock is released, the user can hold the handle 351 to rotate the lock, which is convenient for operation.

In one embodiment, the handle 351 is provided with two lock devices, the two lock devices are provided with a button 352 at the end of the handle, two lock pins which are linked with the button 352 and can slide along the axial direction of the cross bar, and a third reset piece 353 which acts on the button 352, two ends of the unlocking sleeve 35 are fixedly provided with a limit sleeve 354 which limits the axial movement of the unlocking sleeve, and the inner side of the limit sleeve 354 is provided with a locking groove 355 which is matched with the two lock pins.

The sliding sleeve of the button 352 is embedded in the handle 351 and is linked with the limit sleeve 354, and the following components are provided:

in a locking state, the button 352 extends into the locking groove 355 by virtue of the third resetting piece 353, the second locking device is locked, and the handle 351 cannot rotate;

in the unlocked state, the button 352 is manually pressed, the button 352 is withdrawn from the locking groove 355, the second locking device is unlocked, and the handle 351 can be rotated.

By means of the two lock devices, accidental touch or strong vibration is prevented, the lock device is prevented from being released accidentally, and the safety of the frame in the stretching state is further improved.

The third return element 353, which is typically a spring, is secured to the handle 351 and the button 352 to urge the button 352 into the locking recess 355 at all times to ensure proper use of the secondary lock mechanism.

In one embodiment, the connecting link 33 is provided with a connecting sleeve 334 for engaging with the end of the cross rod. The cross bar 34 is inserted into the connecting sleeve 334 to reinforce the structural strength of the connecting portion of the cross bar 34 and the first rod 31 and to limit the driving rod 340 from coming off the cross bar 34.

In one embodiment, the lower frame 1 is connected with a towing rod 5, and the towing rod 5 is detachably connected to one side of the lower frame 1, so that the frame can be folded conveniently and can be stored after the towing rod 5 is detached. The tow bar 5 extends out of the lower frame 1 towards the front end, is conveniently connected with the tail of a bicycle and is used as a bicycle trailer.

As shown in fig. 1 to 6, in one embodiment, a foldable handle bar 20 is disposed at the rear end of the upper frame 2, the handle bar 20 extends obliquely upward toward the rear end in the extended state, so as to be convenient for a user to grip and move, and when being used as a bicycle trailer or folded, the foldable handle bar can be rotatably attached to the upper frame 2, thereby reducing the volume of the whole frame.

The utility model provides a children's transport carrier can regard as handcart or bicycle trailer to use, especially when as bicycle trailer, relies on the triangular structure that upper ledge 2, underframe 1 and two folding units 3 constitute, guarantees that the frame can be under the folding condition, has improved the structural strength of whole frame. And a locking device and a secondary lock are arranged on the folding unit 3, so that the driving safety is improved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. A child transport vehicle, comprising:

an upper frame having a front end and a rear end and defining an upper limit of the cabin;

a lower frame defining a lower limit of the cabin, a front end of the upper frame being pivotably connected to the lower frame;

two folding units, each folding unit comprising a first bar and a second bar pivotally connected to said upper frame and lower frame, respectively, said first bar and second bar being pivotally connected such that the folding units can be folded from an extended position to a folded position, thereby allowing the upper frame to rotate towards the lower frame, each folding unit being provided with locking means for keeping it in the extended position;

the unlocking device is arranged between the two folding units, and can be operated to unlock the two locking devices simultaneously.

2. The child transport vehicle of claim 1, wherein the first and second bars partially overlap, and the locking device comprises a U-shaped connecting buckle disposed on one of the first and second bars and cooperating with the other, a pin hole disposed on the connecting buckle, a lock pin passing through the pin hole to prevent the other from disengaging the connecting buckle, and a first reset member acting on the lock pin.

3. The child transport vehicle of claim 2, wherein the release mechanism comprises a hollow cross bar having two connecting buckles at ends thereof, the locking pin is slidably mounted inside the cross bar, and an unlocking sleeve is sleeved outside the cross bar and can rotate relative to the cross bar to drive the locking pin to exit the pin hole.

4. A child transport carrier according to claim 3, wherein a drive rod is disposed between the release sleeve and the two locking pins, a slope is disposed between an outer circumferential surface of one end of the drive rod and an inner circumferential surface of the release sleeve for driving the two drive rods to move in opposite directions, the other end of the drive rod is connected to the locking pins, and a second reset member is disposed between the two drive rods for acting on the two drive rods.

5. The child transport vehicle of claim 4, wherein the end of the transmission rod is provided with a counter bore for accommodating the lock pin and the first reset member, the two ends of the first reset member respectively abut against the bottom surface of the counter bore and the lock pin, the lock pin is connected with the transmission rod through a radial fixing pin, and the side wall of the counter bore is provided with a kidney-shaped hole in sliding fit with the fixing pin.

6. A child transport vehicle according to claim 3, wherein the release sleeve is provided with a handle for lifting the child carrier in a folded position.

7. The child transport carrier of claim 6, wherein the handle is provided with two locking devices, the two locking devices are provided with a button at an end of the handle, two locking pins which are linked with the button and can slide along the axial direction of the cross bar, and a third reset piece acting on the button, two ends of the unlocking sleeve are fixedly provided with a limiting sleeve for limiting the axial movement of the unlocking sleeve, and the inner side of the limiting sleeve is provided with a locking groove matched with the two locking pins.

8. A child transport carrier according to claim 3, wherein the connection buckle is provided with a connection sleeve engaging with the end of the crossbar.

9. The child transport vehicle of claim 1, wherein the lower frame has a tow bar attached thereto.

10. A child transport vehicle according to claim 1, wherein the rear end of the upper frame is provided with a foldable handlebar.

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