CN212332759U - Handcart convenient to it is folding - Google Patents

Abstract

The utility model discloses a handcart convenient to it is folding, including the back foot pipe, adorn in the first joint subassembly of back foot pipe upper end, the front foot pipe that upper end and first joint subassembly are connected, the handle pipe that lower extreme and first joint subassembly are connected, seat frame and back supporting tube, the handle pipe is equipped with the third joint subassembly, the lower extreme of back supporting tube or second joint subassembly extend can stay tube wobbling portion of upwarping afterwards to the seat frame, but the rear end pivotal connection of portion of upwarping and seat frame, when back supporting tube is received and is closed and expand the swing relatively back foot pipe, the seat frame swing is ordered about to accessible upwarping portion, and drive the front foot pipe by the seat frame and close or swing between the position that expands completely to the back foot pipe is received completely. Through utility model handcart need not the operator in whole in-process additionally with preceding foot pipe supplementary drawing in to the back foot pipe, folding operation is more convenient, and folding back whole volume is littleer.

Description

Handcart convenient to it is folding

Technical Field

The utility model relates to a baby articles for use technical field, in particular to handcart convenient to it is folding.

Background

In order to facilitate transportation and storage, a plurality of trolleys on the market at present adopt foldable structures, and the frame body of the trolley can be folded and folded only by unlocking each connecting joint so as to reduce the volume of the trolley; the unblock switch of traditional handcart sets up in each joint department, will connect the joint unblock back simultaneously, and preceding foot pipe and back foot pipe can not the interlock folding receipts or can't fold totally after folding (both exist great contained angle promptly), need the user to assist with preceding foot pipe and back foot pipe and draw in. Therefore, the folding operation is inconvenient, and the volume after folding is still large.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a handcart convenient to it is folding, it is more convenient to aim at making folding receipts of handcart receive the operation.

In order to achieve the above object, the present invention provides a foldable handcart, which comprises a rear leg tube, a first joint component arranged at the upper end of the rear leg tube, a front leg tube with the upper end connected with the first joint component, a handle tube with the lower end connected with the first joint component, a seat frame and a rear support tube handle tube, wherein the front part of the seat frame is pivotally connected with the front leg tube, the upper end of the rear support tube is pivotally connected with the third joint component, the lower end of the rear support tube is pivotally connected with the rear leg tube directly or through a second joint component, the lower end of the rear support tube or the second joint component extends to the seat frame to form a lifting part which can swing the support tube later, the lifting part is pivotally connected with the rear end of the seat frame, when the rear support tube is folded and unfolded and swung relative to the rear leg tube, the seat frame can be driven to swing by the lifting part, and the seat frame drives the front foot tube to swing between positions where the rear foot tube is completely folded or completely unfolded.

The utility model discloses technical scheme is in the upper end with the back stay tube with but third joint subassembly pivot connection, but with the lower extreme of back stay tube direct or through second joint subassembly and back foot union coupling, but install the front portion pivot of seat frame in preceding foot pipe, and but lower extreme or the second joint subassembly of back stay tube are equipped with the portion of raising up that extends to the rear end pivot connection with the seat frame, so that back stay tube forms the interlock relation through seat frame and preceding foot pipe, when the handcart is handled the expansion state, third joint subassembly is locked by corresponding locking device, the handcart is closed to unable back foot pipe relative of handle pipe and back stay tube, keep expanding. When the folding is needed, the corresponding unlocking button is firstly operated to unlock the third joint component by the main locking device, then the handle tube is pressed downwards to drive the rear supporting tube to swing downwards towards the folding direction of the rear foot tube, and the tilting part drives the seat frame to swing upwards to unlock the balance relation among the front foot tube, the rear foot tube, the seat frame and the rear supporting tube; then, the handle tube is continuously pressed downwards or released so that the handle tube and the rear supporting tube can be folded and swung towards the rear foot tube under the action of gravity, the seat frame pulls the front foot tube to fold and swing towards the rear foot tube under the coordination of the front wheel (namely, the front wheel rolls towards the rear foot tube), and the whole trolley is completely folded.

Drawings

Fig. 1 is a first perspective view of the present invention;

FIG. 2 is a second perspective view of the present invention;

fig. 3 is a side view of the present invention;

FIG. 4 is a schematic view of the first joint component and the second joint set in combination;

FIG. 5 is an exploded view of the first joint assembly and the second joint set;

FIG. 6 is an exploded view of the first joint assembly and the second joint set;

FIG. 7 is a perspective view of the raised portion;

FIG. 8 is a perspective view of the third joint assembly and the fourth joint assembly in mating relationship;

FIG. 9 is an exploded perspective view of a first joint assembly;

FIG. 10 is an exploded perspective view of a third joint assembly;

fig. 11 is a schematic view of the folding device of the present invention.

In the figure: the joint comprises a first joint component 1, a second joint component 2, a second outer joint 21, a second inner joint 22, a locking groove 201, a bayonet 202, a third joint component 3, a third outer joint 31, a third middle joint 32, a third inner joint 33, a positioning slot 341, a positioning column 342, a positioning lug 351, a positioning groove 352, a raised part 4, a step 41, a rear foot pipe 51, a front foot pipe 52, a handle pipe 53, a handle upper pipe 531, a handle lower pipe 532, a seat frame 541 54, a longitudinal pipe 542, a supporting beam 543, a first pivoting part 543, a rear supporting pipe 55, a fourth joint component 6 and an extension pipe 61.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indicators (such as … …, upper, lower, left, right, front, back, top, bottom, inner, outer, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial) are involved in the embodiments of the present invention, the directional indicators are only used to explain the relative position, motion, etc. of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

In addition, if there is a description relating to "first" or "second", etc. in the embodiments of the present invention, the description of "first" or "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a handcart convenient to it is folding.

In the embodiment of the present invention, as shown in fig. 1 to 11, the foldable cart comprises a rear leg tube 51, a first joint assembly 1 mounted on the upper end of the rear leg tube 51, a front leg tube 52 whose upper end is connected to the first joint assembly 1 and which can be unfolded and folded with respect to the rear leg tube 51, a handle tube 53 whose lower end is connected to the first joint assembly 1 and which can be unfolded and folded with respect to the rear leg tube 51, a seat frame 54 and a rear support tube 53, rear wheels being mounted on the lower end of the rear leg tube 51, front wheels being mounted on the lower end of the front leg tube 52, a third joint assembly 3 being mounted on the handle tube 53, the front portion of the seat frame 54 being pivotally connected to the front leg tube 52, the upper end of the rear support tube 53 being pivotally connected to the third joint assembly 3, the lower end of the rear support tube 53 being pivotally connected to the rear leg tube 51 directly or via the second joint assembly 2 and being capable of swinging with respect to the rear leg tube 51, a raising support tube 4 being extended from the lower end of the rear support tube 53 to the seat frame 54, the lifting part 4 is pivotally connected to the rear end of the seat frame 54, and when the rear supporting tube 53 is folded and unfolded and swings relative to the rear leg tube 51, the lifting part 4 can drive the seat frame 54 to swing, and the seat frame 54 drives the front leg tube 52 to swing between positions where the rear leg tube 51 is completely folded or completely unfolded.

The utility model discloses but with back stay tube 53's upper end and third joint subassembly 3 pivotal connection, but be connected back stay tube 53's lower extreme is direct or through second joint subassembly 2 and back foot pipe 51, but install the front portion pivot of seat frame 54 in preceding foot pipe 52, and but lower extreme or second joint subassembly 2 at back stay tube 53 are equipped with the portion of upwarping 4 that extends to the rear end pivotal connection with seat frame 54, so that back stay tube 53 forms the interlock relation through seat frame 54 and preceding foot pipe 52, when the handcart is handled the expansion state, third joint subassembly 3 is locked by corresponding locking device, hand pipe 53 and the unable relative back foot pipe 51 of back stay tube 53, the handcart is closed and is held to receive and is expanded. When the folding is needed, the corresponding unlocking button is firstly operated to unlock the third joint component 3 by the locking device, then the handle pipe 53 is pressed downwards to drive the rear supporting pipe 53 to swing downwards towards the folding direction of the rear foot pipe 51, and the lifting part 4 drives the seat frame to swing upwards to unlock the balance relation among the front foot pipe 52, the rear foot pipe 51, the seat frame and the rear supporting pipe 53; then, the handle tube 53 is further pressed downwards or the handle tube 53 is released so that the handle tube 53 and the rear support tube 53 are folded and swung towards the rear foot tube 51 under the action of gravity, and the seat frame 54 pulls the front foot tube 52 to fold and swing towards the rear foot tube 51 under the cooperation of the front wheels (i.e. the front wheels roll towards the rear foot tube 51), until the whole trolley is completely folded, the operator does not need to additionally fold the front foot tube 52 towards the rear foot tube 51 in the whole process, the folding operation is more convenient, and the overall volume after folding is smaller.

The embodiment of the present invention provides an embodiment, the handle tube 53 includes a handle lower tube 532 with the lower end connected with the first joint component 1, and a handle upper tube 531 connected to the handle lower tube 532 through the third joint component 3 and capable of relatively unfolding and folding the handle lower tube 532.

When folding is required, firstly, the corresponding unlocking button is operated to unlock the third joint component 3 by the locking device, and then the handle upper tube 531 is folded and turned anticlockwise (as shown in fig. 3) towards the handle lower tube 532 relative to the third joint component 3; then, the handle upper tube 531 and the handle lower tube 532 are pressed downwards to drive the rear support tube 53 to swing downwards towards the direction that the rear leg tube 51 is folded, and the raising part 4 drives the seat frame to swing upwards to release the balance relation among the front leg tube 52, the rear leg tube 51, the seat frame and the rear support tube 53; then, the handle top tube 531 is further pressed down or the handle top tube 531 is released so that the handle top tube 531, the handle down tube 532 and the rear support tube 53 swing toward the rear leg tube 51 under the action of gravity, and the seat frame 54 pulls the front leg tube 52 to swing toward the rear leg tube 51 under the cooperation of the front wheels (i.e., the front wheels roll toward the rear leg tube 51), until the entire stroller is completely folded, and the fully folded stroller can be supported by the front wheels and the rear wheels to stand on the ground, so as to further reduce the overall volume of the folded stroller.

In the embodiment of the present invention, the seat frame 54 includes two longitudinal tubes 541 spaced apart from each other, and connect the supporting beam 542 and the cartridge between two longitudinal tubes 541 in the first pivot portion 543 at the rear end of the longitudinal tube 541, the front portion of the longitudinal tube 541 is pivotally connected to the front leg tube 52, preferably, the front portion of the first pivot portion 543 is inserted into the longitudinal tube 541 and is fixedly connected to the longitudinal tube 541 by a screw or a rivet, the rear portion of the first pivot portion 543 is curved downward in an arc shape, the inner side of the rising portion 4 is equipped with the step 41 as the inner side in the direction toward the center of the cart, the rear end of the first pivot portion 543 is pivotally mounted (e.g. pivotally mounted on the step 41 by a bolt or a rivet), and when the cart is completely unfolded, the rear side wall of the first pivot portion 543 abuts against the rear side wall of the step 41 to limit the swing range of the seat frame 54.

In the embodiment of the present invention, the second joint assembly 2 includes that the second outer joint 21, the pivot of fixed mounting in the back foot pipe 51 are installed in the second inner joint 22 of the second outer joint 21, the second inner joint 22 extends towards the seat frame 54 the portion 4 that rises to stick up, the seat frame 54 has the first pivot portion 543 of extending backward, but portion 4 and the first pivot portion 543 pivot connection that rises to but the rear end and the portion 4 pivot connection that rises to stick up of seat frame 54.

In the embodiment of the present invention, the third joint assembly 3 comprises a third outer joint 31, a third middle joint 32 and a third inner joint 33, the third inner joint 33 and the third outer joint 31 are pivotally mounted on both sides of the third middle joint 32, the third outer joint 31 is connected with a handle upper tube 531, the handle lower tube 532 is connected with a third middle joint 32, the third inner joint 33 is connected with a rear supporting tube 53, a first locking device for locking the third outer joint 31 and the third middle joint 32 in the unfolding state is arranged between the third outer joint 31 and the third middle joint 32, a second locking device for locking the third inner joint 33 and the third middle joint 32 in the unfolded state is provided between the third inner joint 33 and the third middle joint 32, and an unlocking device for unlocking the third outer joint 31 and the third middle joint 32 by the first locking device and the third inner joint 33 and the third middle joint 32 by the second locking device.

In the embodiment of the present invention, the first locking device, the second locking device and the unlocking device may have various embodiments, such as adopting the prior art, wherein, in the embodiment, the unlocking device may refer to the utility model patent with patent publication number CN 206446647U. Of course, the following embodiments can also be used for the first and second locking means: as shown in fig. 4-10.

In the embodiment of the present invention, the first locking device includes a positioning slot 341 disposed on the third outer joint 31 and a positioning column 342 and a first return spring slidably mounted on the handle upper tube 531, the positioning column 342 can slide between the position where the positioning slot 341 locks the third outer joint 31 and the third middle joint 32 and the position where the positioning slot 341 unlocks the third outer joint 31 and the third middle joint 32, the first return spring is used for applying an elastic force to the positioning column 342 to move to the position of the positioning slot 341, and the unlocking device is used for driving the positioning column 342 to move to the position of the positioning slot 341 to make the trolley in the unfolded state, and the positioning column 342 is clamped in the positioning slot 341.

In the embodiment of the present invention, the second locking device includes a positioning projection 351 and a second return spring slidably mounted on the third inner joint 33 and a positioning groove 352 of the third middle joint 32, the positioning projection 351 can slide between the positions of the third inner joint 33 and the third middle joint 32 locked by the positioning groove 352 and unlocked by the third inner joint 33 and the third middle joint 32 released by the positioning groove 352, the second return spring is used for applying an elastic force to the positioning projection 351 to move toward the position of the card inserted into the positioning groove 352 (so that the positioning projection 351 is clamped in the positioning groove 352 when the cart is in the unfolded state), and the unlocking device is used for driving the positioning projection 351 to move toward the position of the withdrawn positioning groove 352, so as to release the locking of the third inner joint 33 and the third middle joint 32 when the hand pushing force needs to be folded.

The embodiment of the utility model provides an in, unlocking device is including the unblock key of locating hand (hold) top tube 531, connects the first rope of receiving of unblock key and reference column 342 to and the second rope of receiving of connecting third outer joint 31 and positioning convex block 351, can order about first rope of receiving when pressing the unblock key and drive reference column 342 and slide towards keeping away from positioning slot 341, and the direction that the direction was received to receipts rotates third outer joint 31 and then can order about second rope of receiving and drive positioning convex block 351 and slide towards the direction of keeping away from positioning groove 352. The working principle of the unlocking device can refer to the embodiment disclosed in the utility model with the publication number CN 206446647U.

In the embodiment of the present invention, the third inner joint 33 is connected with an extension pipe 61, and the extension pipe and the rear support pipe 53 are pivotally connected through the fourth joint assembly 6. After being completely folded, the rear supporting tube 53 is basically parallel to the handle lower tube 532, so that the volume of the whole vehicle can be reduced.

The embodiment of the utility model provides an in, second joint subassembly 2 is equipped with main locking device for when the expansion state, with the locking of second outer joint 21 and second inner joint 22, unlocking means still can be used to relieve main locking device to the locking of second outer joint 21 and second inner joint 22.

The embodiment of the utility model provides an in, the one side that second outer joint 21 and second inner joint 22 are relative is equipped with locking groove 201, main locking device includes slidable mounting in the second inner joint 22 bayonet lock 202 and third reset spring, bayonet lock 202 can be in the locking groove 201 with the position of second outer joint 21 and second inner joint 22 locking and withdraw from the locking groove 201 with the second outer joint 21 and the second inner joint 22 unblock between the position, third reset spring is used for exerting the elasticity of the position removal of locking groove 201 to the card to bayonet lock 202, unlocking device still includes that connection bayonet lock 202 and third inner joint 33 are equipped with the second rope of taking up the car, and the rotatory third inner joint 33 of direction of taking up the car can drive the position slip of bayonet lock 202 towards keeping away from second outer locking groove 201 toward taking up the car.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (11)

1. The utility model provides a handcart convenient to it is folding, includes the back foot pipe, adorns in the first joint subassembly of back foot pipe upper end, the handlebar pipe, seat frame and the back stay tube that the preceding foot pipe, lower extreme and the first joint subassembly of upper end and first joint subassembly are connected, the handlebar pipe is equipped with third joint subassembly, its characterized in that: but the front portion and the preceding foot pipe pivotal connection of seat frame, but the upper end and the third joint subassembly pivotal connection of back supporting tube, but back supporting tube lower extreme is direct or through second joint subassembly and back foot pipe pivotal connection, but the lower extreme of back supporting tube or second joint subassembly extend to the seat frame and can stay tube wobbling portion of rising afterwards, but the portion of rising the portion and the rear end pivotal connection of seat frame, when back supporting tube is closed and is expanded the swing with the expansion relative back foot pipe, the seat frame swing is ordered about to the accessible portion of rising, and drive by the seat frame that the preceding foot pipe is closed completely or is expanded the swing between the position completely.

2. A cart for facilitating folding as claimed in claim 1, wherein: the handle pipe comprises a handle lower pipe of which the lower end is connected with the first joint assembly and a handle upper pipe connected to the upper end of the handle lower pipe through a third joint assembly.

3. A cart for facilitating folding as claimed in claim 1, wherein: seat frame about including two vertical pipes of interval distribution to and connect in supporting beam between two vertical pipes and cartridge in the first pivot portion of vertical pipe rear end, but the anterior pivot connection of vertical pipe is in preceding foot pipe, the downward arc bending of rear portion of first pivot portion, it is equipped with the step to rise the portion inboard of warping, but the rear end pivot mounting of first pivot portion in the step, and when the handcart was in the complete expansion, the rear side wall of first pivot portion offsets with the rear side wall of step.

4. A cart for facilitating folding as claimed in claim 1, wherein: the second joint assembly comprises a second outer joint fixedly installed on the rear foot tube and a second inner joint pivotally installed on the second outer joint, the second inner joint extends out of the tilting portion towards the seat frame, the seat frame extends backwards to form a first pivoting portion, and the tilting portion is pivotally connected with the first pivoting portion.

5. A cart for facilitating folding as claimed in claim 2, wherein: the third joint assembly comprises a third outer joint, a third middle joint and a third inner joint, the third inner joint and the third outer joint are respectively installed on two sides of the third middle joint in a pivoting mode, the third outer joint is connected with the upper handle pipe, the lower handle pipe is connected with the third middle joint, the third inner joint is connected with the rear supporting pipe, a first locking device used for locking the third outer joint and the third middle joint in the unfolding state is arranged between the third outer joint and the third middle joint, a second locking device used for locking the third inner joint and the third middle joint in the unfolding state is arranged between the third inner joint and the third middle joint, and an unlocking device is used for unlocking the third outer joint and the third middle joint through the first locking device and the third inner joint and the third middle joint through the second locking device.

6. The collapsible cart of claim 5, wherein: first locking device including locate the third outer joint the location slot and slidable mounting in reference column and the first reset spring of hand (hold) top tube the reference column can slide between the position of card in the location slot and the position of withdrawing from the location slot, first reset spring is used for exerting the elasticity to the position removal of card in the location slot to the reference column, unlocking device is used for ordering about the reference column and removes toward the position of withdrawing from the location slot.

7. The foldable trolley according to claim 6, wherein: the second locking device comprises a positioning lug arranged on the joint in the third in a sliding manner, a second reset spring and a positioning groove arranged on the joint in the third, the positioning lug can slide between the position where the positioning groove is clamped and the position where the positioning groove exits, the second reset spring is used for applying elastic force to the positioning lug, the elastic force is clamped into the position where the positioning groove moves, and the unlocking device is used for driving the positioning lug to move towards the position where the positioning groove exits.

8. The collapsible cart of claim 7, wherein: unlocking device is including the unlocking key of locating the hand (hold) top tube, connects the first rope of receiving of unlocking key and reference column to and connect the second rope of receiving of third outer joint and location lug, can order about first rope of receiving and drive the reference column and slide towards keeping away from the positioning slot when pressing the unlocking key, and the direction of receiving and closing rotates the third outer joint and then can order about the second rope of receiving and drive the location lug and slide towards the direction of keeping away from the positioning groove.

9. A cart for facilitating folding as claimed in claim 8, wherein: the third inner joint is connected with an extension pipe, and the extension pipe and the rear supporting pipe are pivotally connected through a fourth joint component.

10. A cart for facilitating folding as claimed in claim 8, wherein: the second joint assembly is provided with a primary locking device for locking the second outer joint and the second inner joint in the unfolded state, and the unlocking device can also be used for unlocking the locking of the secondary outer joint and the second inner joint by the primary locking device.

11. A cart for facilitating folding as claimed in claim 10, wherein: the one side that the joint is relative in the outer joint of second and the second is equipped with the locking groove, but main locking device includes joint's bayonet lock and third reset spring in the second slidable mounting, the bayonet lock can slide between the position of card in the locking groove and the position of withdraw from the locking groove, third reset spring is used for exerting the bayonet lock with the elasticity of going into the position removal of locking groove to the card, unlocking device still includes to connect bayonet lock and third interior joint and is equipped with the second rope of collecting the car, and the joint can drive the third rope of collecting the car and drive the bayonet lock and slide towards the position of keeping away from the outer locking groove of second towards the rotatory third of direction of collecting.

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