CN214930015U

CN214930015U - Hand cart frame

Info

Publication number: CN214930015U
Application number: CN202121185124.3U
Authority: CN
Inventors: 胡杰; 李绍钦
Original assignee: Dongguan Jinwang Children Products Co ltd
Current assignee: Dongguan Jinwang Children Products Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-30
Anticipated expiration: 2031-05-28

Abstract

The utility model discloses a handcart frame, which comprises a push rod, a front foot tube, a rear foot tube, a lower frame and a surrounding tube, wherein the front side of the lower frame is hinged with the lower part of the front foot tube, the rear side of the lower frame is hinged with the lower part of the rear foot tube, the handcart frame also comprises a connecting rod and a sliding unlocking device, and the upper part of the front foot tube is slidingly hinged with the upper part of the rear foot tube through the sliding unlocking device; one end of the connecting rod is hinged to the sliding unlocking device, the other end of the connecting rod is hinged to the first position of the surrounding pipe, and the second position of the surrounding pipe is hinged to the front foot pipe; the slide unlocking device has at least two states: when the sliding unlocking device is in a locking state, the push rod is locked on the front foot tube through the sliding unlocking device, the positions of the push rod and the front foot tube are in a relatively extending state, and the frame of the handcart is in an unfolding state; when the sliding unlocking device is in an unlocking state, the push rod slides towards the contracting direction relative to the front foot tube, and the sliding unlocking device drives the connecting rod, the surrounding tube and the rear foot tube to move towards the overall contracting direction and move towards the lower frame to finally move to the accommodating state.

Description

Hand cart frame

Technical Field

The utility model relates to a children's handcart's technical field especially relates to a handcart frame.

Background

The existing handcart has the problems of complex structure, unstable folding, low folding speed and the like in the folding structure.

Therefore, it is necessary to design a handcart frame which has a reasonable structure, is stable in folding and can realize quick folding.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a handcart frame rational in infrastructure, that the receipts car is stable and can realize receiving the car fast.

The technical scheme of the utility model provides a handcart frame, including push rod, preceding foot pipe, back foot pipe, underframe and surround the pipe, the front side of underframe and the lower part of preceding foot pipe are articulated, the rear side of underframe and the lower part of back foot pipe are articulated, still include connecting rod and slip unlocking device, the upper portion of preceding foot pipe and the upper portion of back foot pipe are through slip unlocking device slip articulated;

one end of the connecting rod is hinged to the sliding unlocking device, the other end of the connecting rod is hinged to the first position of the enclosing pipe, and the second position of the enclosing pipe is hinged to the front foot pipe;

the sliding unlocking device has at least two states:

when the sliding unlocking device is in a locking state, the push rod is locked on the front foot tube through the sliding unlocking device, the positions of the push rod and the front foot tube are in a relatively extended state, and the frame of the handcart is in an unfolded state;

when the sliding unlocking device is in an unlocking state, the push rod slides relative to the front foot tube in the contraction direction, and the sliding unlocking device drives the connecting rod, the enclosing tube and the rear foot tube to move in the integral contraction direction, move towards the lower frame and finally move to the storage state.

Further, the slide unlocking device includes:

the sliding sleeve is provided with at least two through holes which are arranged in parallel and are respectively a first pipe fitting and a second pipe fitting, the lower part of the push rod is fixed in the first pipe fitting, the front foot tube is slidably arranged in the second pipe fitting in a penetrating manner, the upper part of the rear foot tube is hinged with the sliding sleeve, and one end of the connecting rod is hinged with the sliding sleeve;

the locking assembly is arranged in the push rod and can control the locking and the relative sliding of the push rod and the front foot tube.

Further, the locking assembly includes: the push rod joint, the lock hook group, the traction piece, the spring and the trigger mechanism;

the push rod joint is arranged in the first pipe fitting of the sliding sleeve or the push rod, a guide groove is formed in the push rod joint, the lock hook group is arranged in the guide groove and can move in a telescopic mode relative to the guide groove, an insertion groove for inserting the lock hook group is formed in the front foot pipe, the spring is installed between the lock hook group and the guide groove, and the traction piece is connected between the trigger mechanism and the lock hook group;

in a locking state, under the pushing of the spring, the latch hook group extends out of the guide groove and is inserted into the insertion groove;

in an unlocking state, the trigger mechanism drives the lock hook group to retract into the guide groove through the traction piece and is separated from the slot. Further, the latch hook group comprises an anti-wear sleeve and an insertion sheet, wherein the insertion sheet is at least partially installed in the anti-wear sleeve.

Further, the abrasionproof cover includes body and abrasionproof piece, the mounting hole has been seted up on the body, the one end of inserted sheet is inserted in the mounting hole, the abrasionproof piece is followed one side of mounting hole extends, and with the inserted sheet contact, the abrasionproof piece with the inserted sheet can be inserted together in the slot.

The upper part of the front foot tube is fixedly connected with the sleeve, the push rod penetrates through the sleeve and can slide relatively, and the second position of the enclosing tube is hinged with the sleeve;

in a locked state, the sliding sleeve and the sleeve are close to each other;

in an unlocking state, the sliding sleeve moves towards the direction far away from the sleeve along the front foot tube.

Furthermore, the sunshade device also comprises a sunshade rod group, and the sunshade rod group is hinged with the sleeve.

Further, the first position of the shroud is forward of the second position.

Furthermore, a traction hole and a traction groove are formed in the push rod joint, the traction hole is communicated with the guide groove, one end of the traction piece penetrates through the traction hole and then is connected with the lock hook group in the guide groove, the traction piece penetrates into the push rod along the traction groove, and the other end of the traction piece is connected with the trigger mechanism.

Furthermore, a spring positioning protrusion is arranged on the anti-abrasion sleeve, a spring accommodating groove is arranged in the guide groove, one end of the spring is in contact with the spring accommodating groove, and the other end of the spring is sleeved on the spring positioning protrusion on the anti-abrasion sleeve.

Further, the trolley frame further comprises a lower frame, the front side of the lower frame is hinged with the lower portion of the front foot pipe, and the rear side of the lower frame is hinged with the lower portion of the rear foot pipe.

Furthermore, the sunshade device also comprises a sunshade rod group, and the sunshade rod group is connected with the surrounding pipe.

After adopting above-mentioned technical scheme, have following beneficial effect:

when the sliding unlocking device is in a locking state, the push rod and the front foot tube are locked, so that the handcart frame is kept in an unfolding state; when slip unlocking device is for the unblock state, with push rod and preceding foot pipe unblock, the handcart frame can remove to accomodating the state, and after the unblock of slip unlocking device, can drive back foot pipe and connecting rod motion, the connecting rod drives the pipe motion again, the utility model provides a handcart frame is rational in infrastructure, and the process of receiving is stable to can receive the car fast.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

FIG. 1 is a perspective view of a cart frame according to an embodiment of the present invention;

FIG. 2 is an expanded view of the frame of the cart according to an embodiment of the present invention;

FIG. 3 is a state diagram illustrating a process of retrieving a stroller frame according to an embodiment of the present invention;

FIG. 4 illustrates a stored position of the cart frame according to an embodiment of the present invention;

fig. 5 is a perspective view of the sliding sleeve according to an embodiment of the present invention;

fig. 6 is a schematic view of an internal structure of the sliding sleeve according to an embodiment of the present invention;

fig. 7 is a diagram illustrating a locking state of the locking assembly according to an embodiment of the present invention;

fig. 8 is an unlocking state diagram of the locking assembly according to an embodiment of the present invention;

fig. 9 is an exploded view of a locking assembly in an embodiment of the invention;

fig. 10 is an exploded view from another perspective of a locking assembly in an embodiment of the invention;

fig. 11 is a perspective view of the sleeve according to an embodiment of the present invention.

Reference symbol comparison table:

the device comprises a push rod 1, a rear foot tube 3, a surrounding tube 4 and a connecting rod 5;

front leg tube 2: a slot 21;

the slide unlocking device 6:

the sliding sleeve 61: a first tube 611, a second tube 612, a first hinge 613, a second hinge 614, a through hole 6111;

the locking assembly 62: the push rod joint 621, the lock hook group 622, the trigger mechanism 623, the guide groove 6211, the traction hole 6212, the traction groove 6213, the anti-wear sleeve 6221, the insertion sheet 6222, the body 6221a, the anti-wear block 6221b, the spring positioning protrusion 6221c and the mounting hole 6221 d;

a sleeve 7, a lower frame 8 and wheels 9;

sunshade pole group 10: a first sunshade rod 101, a second sunshade rod 102.

Detailed Description

The following describes the present invention with reference to the accompanying drawings.

It is easily understood that, according to the technical solution of the present invention, a plurality of structural modes and implementation modes that can be mutually replaced by those of ordinary skill in the art can be achieved without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as limiting or restricting the technical solutions of the present invention in its entirety or as a limitation of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

In some embodiments of the present invention, as shown in fig. 1-2, the cart frame comprises a push rod 1, a front leg tube 2, a rear leg tube 3, a lower frame 8 and a surrounding tube 4, wherein the front side of the lower frame 8 is hinged to the lower portion of the front leg tube 2, the rear side of the lower frame 8 is hinged to the lower portion of the rear leg tube 3, the cart frame further comprises a connecting rod 5 and a sliding unlocking device 6, and the upper portion of the front leg tube 2 is slidably hinged to the upper portion of the rear leg tube 3 through the sliding unlocking device 6;

one end of the connecting rod 5 is hinged on the sliding unlocking device 6, the other end of the connecting rod is hinged on a first position of the enclosing pipe 4, and a second position of the enclosing pipe 4 is hinged with the front foot pipe 2;

the slide unlocking device 6 has at least two states:

when the sliding unlocking device 6 is in a locking state, the push rod 1 is locked on the front foot tube 2 through the sliding unlocking device 6, the positions of the push rod and the front foot tube are in a relatively extending state, and the frame of the handcart is in an unfolding state;

when the sliding unlocking device 6 is in an unlocking state, the push rod 1 slides in the contraction direction relative to the front foot tube 2, and the sliding unlocking device 6 drives the connecting rod, the enclosing tube 4 and the rear foot tube 3 to move in the overall contraction direction, and move to the storage state after being drawn close to the lower frame 8.

Wherein, the utility model discloses well "upper portion", "lower part" mean: the trolley frame is in the relative position in the unfolded state.

Specifically, the push rod 1 is a U-shaped rod, two ends of the push rod 1 are respectively and fixedly connected with the sliding unlocking device 6, and the push rod 1 is used for being held by a user conveniently and pushing a frame of the handcart.

When the sliding unlocking device 6 is in a locking state, the position between the push rod 1 and the front foot pipe 2 is locked, the push rod 1 extends upwards towards the direction far away from the front foot pipe 2, and the handcart frame is in a unfolding state.

When the sliding unlocking device 6 is in an unlocking state, the push rod 1 is pushed downwards, and the push rod 1 pushes the sliding unlocking device 6 to slide downwards along the length direction of the front foot tube 2, so that the push rod 1 is retracted towards the front foot tube 2.

The number of the front foot tubes 2 is two, and the upper ends of the front foot tubes 2 are connected with a sliding unlocking device 6; the sliding unlocking device 6 can be locked or unlocked with the front foot pipe 2 and can slide along the front foot pipe 2 when the sliding unlocking device 2 is unlocked; the lower end of the front leg tube 2 is connected with two wheels 9.

The number of the rear foot tubes 3 is two, the upper ends of the rear foot tubes 3 are hinged with the sliding unlocking devices 6 and can move along with the sliding unlocking devices 6, and the lower ends of the rear foot tubes 3 are connected with the two wheels 9.

The surrounding pipe 4 is positioned in the middle of the frame of the trolley, the surrounding pipe 4 is a roughly rectangular frame, and the surrounding pipe 4 is used for installing a seat bag made of woven fabric. The left side and the right side of the enclosing pipe 4 are respectively provided with a first position and a second position, the first positions are hinged with the sliding unlocking device 6 through the connecting rod 5, when the sliding unlocking device 6 slides downwards after being unlocked, the connecting rod 5 is driven to rotate, and the connecting rod 5 drives the enclosing pipe 4 to move downwards; the second position is articulated with preceding leg 2, and during the state of accomodating, the upper end of preceding leg 2 is upset downwards, drives the pipe enclosure 4 and moves down together.

The connecting rod 4 is used for supporting the surrounding pipe 4 when the handcart frame is in an unfolded state; after the sliding unlocking device 6 is unlocked, the enclosing pipe 4 is driven to be stored and folded downwards.

The lower frame 8 is a rectangular frame and is used for connecting the front foot tube 2 and the rear foot tube 3, and the structural stability of the trolley frame is improved. In the unfolded state, the down tube 4 is used to mount the upper edge of the seat pocket, the down frame 8 is used to mount the lower edge of the seat pocket, and the down frame 8 can bear the weight of the seat pocket and the infant or the article in the seat pocket.

In this embodiment, as shown in fig. 3, after the sliding unlocking device 6 is unlocked, the push rod 1 pushes the sliding unlocking device 6 to slide downwards along the length direction of the front foot tube 2, the sliding unlocking device 6 drives the upper end of the rear foot tube 3 to slide downwards along the front foot tube 2, and simultaneously drives the lower end of the connecting rod 5 to slide downwards along the front foot tube 2, and the connecting rod 5 drives the surrounding tube 4 to move downwards, so that the rapid folding of the frame of the handcart can be realized; meanwhile, when the push rod 1 pushes the sliding unlocking device 6, downward overturning force is applied, the push rod 1 pushes the front foot tube 2 to overturn downward together, the front foot tube 2 drives the second position of the enclosing tube 4 to move downward together, and the first position and the second position of the enclosing tube 4 move downward simultaneously, so that the stable descending motion of the enclosing tube 4 is realized, the horizontal descending state is basically kept, and the stable folding of the whole trolley frame is realized.

As shown in fig. 4, in the storage state of the stroller frame, the push rod 1 is turned to the horizontal position, the front leg tube 2 and the rear leg tube 3 are also turned to the substantially horizontal position, and are overlapped with the lower frame 8, so that the whole stroller frame can be stored to the minimum volume for convenient storage and transportation.

In some embodiments of the present invention, the sliding unlocking device 6 comprises a sliding sleeve 61 and a locking assembly 62;

as shown in fig. 5-6, the sliding sleeve 61 is provided with at least two through holes arranged in parallel, namely a first pipe 611 and a second pipe 612, the lower part of the push rod 1 is fixed in the first pipe 611, the front leg tube 2 is slidably inserted in the second pipe 612, the upper part of the rear leg tube 3 is hinged with the sliding sleeve 61, and one end of the connecting rod 5 is hinged with the sliding sleeve 61;

as shown in fig. 7, a locking assembly 62 is installed in the push rod 1 and is capable of controlling locking and relative sliding of the push rod 1 and the head tube 2.

Specifically, as shown in fig. 5 to 6, the sliding sleeve 61 includes a first tube 611 and a second tube 612 which are parallel to each other, wherein the first tube 611 is fixedly connected to the lower portion of the push rod 1. The second pipe 612 is sleeved outside the front leg tube 2, when the locking assembly 62 is unlocked from the front leg tube 2, the push rod 1 can push the sliding sleeve 61, and the second pipe 612 can slide downward along the front leg tube 2.

As shown in fig. 5, the sliding sleeve 61 further has a first hinge portion 613 and a second hinge portion 614, the first hinge portion 613 is hinged to one end of the connecting rod 5, and the second hinge portion 614 is hinged to the upper portion of the rear leg tube 3. Thus, when the sliding sleeve 61 slides, the connecting rod 5 and the rear foot tube 3 can be driven to move together.

As shown in fig. 6-7, the locking assembly 62 is installed in the push rod 1, and the push rod 1 is installed in the first tubular member 611. In the locked state of the sliding unlocking device 6, a part of the locking assembly 62 passes through the through hole 6111 of the first pipe 611, is inserted into the second pipe 612, and is locked with the front leg 2.

The push rod 1 and the front foot pipe 2 are arranged in parallel with each other through the sliding sleeve 61, when the trolley frame is unfolded, the push rod 1 and the front foot pipe 2 extend to the longest in the direction away from each other and are locked through the locking assembly 62; in the stored state of the stroller frame, the locking assembly 62 is unlocked, and the push rod 1 slides down the rail and the front leg 2 to overlap each other at a position having the smallest length.

The sliding unlocking device 6 realizes locking between the push rod 1 and the front foot tube 2 and overlapping storage between the push rod 1 and the front foot tube 2, and the sliding sleeve 61 drives the linkage storage movement of the connecting rod 5 and the rear foot tube 3.

The sliding sleeve 61 is arranged to realize relative sliding between the front foot tube 2 and the push rod 1, and is easy to install and stable in folding and unfolding processes.

In some embodiments of the present invention, as shown in fig. 7-8, the locking assembly 62 includes: a push rod joint 621, a latch hook set 622, a traction member, a spring and a trigger mechanism 623;

the push rod joint 621 is arranged in the first pipe fitting 611 of the sliding sleeve 61 or in the push rod 1, a guide groove 6211 is arranged in the push rod joint 621, the latch hook group 622 is arranged in the guide groove 6211 and can make telescopic motion relative to the guide groove 6211, the front leg pipe 2 is provided with an insertion groove 21 for inserting the latch hook group 622, the spring is arranged between the latch hook group 622 and the guide groove 6211, and the traction member is connected between the trigger mechanism 623 and the latch hook group 622;

in the locked state, the latch hook group 622 is pushed by the spring to extend out of the guide slot 6211 and be inserted into the insertion slot 21;

in the unlocked state, the trigger mechanism 623 pulls the latch hook group 622 to retract into the guide groove 6211 by the pulling member and to be separated from the insertion groove 21.

The push rod joint 621 is inserted into the pipe orifice of the lower end of the push rod 1, and then the lower end of the push rod 1 is in interference fit with the inside of the first pipe 611, or is fixedly connected in other ways.

Alternatively, the push rod joint 621 may be fixedly connected to the push rod 1 at one end, and then inserted into the first tube 611 to be directly and fixedly connected to the first tube 611.

As shown in fig. 9, the push rod joint 621 is opened with a guide groove 6211 along a direction perpendicular to the length direction, and the latch hook group 622 is installed in the guide groove 6211 and can perform a telescopic motion in the guide groove 6211.

When the push rod 1 is extended, the hook set 622 is inserted into the slot 21 of the front leg tube 2, and the push rod 1 is locked with the front leg tube 2, as shown in fig. 7.

As shown in fig. 8, when retracting, the locking hook set 622 retracts into the first tube 611 of the sliding sleeve 61, the locking hook set 622 is separated from the front leg 2, and the second tube 612 of the sliding sleeve 61 can slide down along the front leg 2.

Not shown in the figures are a spring mounted between the latch hook set 622 and the guide slot 6211 and a pulling member connected between the trigger mechanism 623 (see fig. 1) and the latch hook set 622.

Preferably, the pulling member may be a wire rope, one end of which is connected to the triggering mechanism 623 and the other end of which is connected to the latch hook set 622.

Alternatively, the pulling member may be another rope having certain strength and flexibility to be easily threaded into the push rod 1 and connected to the latch hook set 622.

In this embodiment, the trigger mechanism 623 is mounted on the upper portion of the push rod 1, so that the user can operate the trigger mechanism 623, and the trigger mechanism 623 can be triggered by pressing, pulling or rotating by the user.

Optionally, the trigger mechanism 623 may also be mounted at the armrest of the push rod 1; or at the bottom of the frame of the trolley, which the user can trigger by pulling upwards, or stepping downwards.

In the locked state, the spring pushes the latch hook group 622 outward, so that a portion of the latch hook group 622 protrudes from the guide groove 6211 and is inserted into the insertion groove 21.

In the unlocking state, the trigger mechanism 623 is pulled, the trigger mechanism 623 drives the traction piece, the traction piece drives the latch hook group 622 to retract into the guide groove 6211, the slot 21 in the latch hook group 622 is separated, and at the moment, the latch hook group 622 compresses the spring.

Further, as shown in fig. 9, the latch hook set 622 includes a wear sleeve 6221 and a tab 6222, the tab 6222 being at least partially mounted in the wear sleeve 6221. The latch hook among the prior art is usually direct advance with be connected the member locking, the in-process will be easily scratched by the connecting piece, destroys aesthetic property and stability, adds to establish abrasionproof cover 6221 and can effectual reduction to the scratch of member, also can make the more smooth and easy of locking process.

Specifically, the insert 6222 is made of metal and the wear sleeve 6221 is made of plastic. A part of the insertion piece 6222 is inserted into the anti-wear sleeve 6221, the anti-wear sleeve 6221 is installed in the guide groove 6211, another part of the insertion piece 6222 can be inserted into the insertion groove 21, and the insertion piece 6222 made of metal has sufficient rigidity so that the push rod 1 can be stably locked on the front foot tube 2, and the unlocking of the sliding unlocking device 6 caused when the push rod 1 is pushed down by a large force is avoided.

Further, as shown in fig. 9, the anti-wear sleeve 6221 includes a body 6221a and an anti-wear block 6221b, the body 6221a is provided with a mounting hole 6221d, one end of the insertion piece 6222 is inserted into the mounting hole 6221d, the anti-wear block 6221b extends out from one side of the mounting hole 6221d and contacts with the insertion piece 6222, and the anti-wear block 6221b and the insertion piece 6222 can be inserted into the insertion slot 21 together.

The wear-proof blocks 6221b are used to protect the side walls of the slot 21 and prevent the insert 6222 from wearing the slot 21.

Furthermore, as shown in fig. 10, the push rod joint 621 is provided with a traction hole 6212 and a traction groove 6213, the traction hole 6212 is communicated with the guide groove 6211, one end of the traction element passes through the traction hole 6212 and then is connected with the latch hook group 622 in the guide groove 6211, the traction element passes through the push rod 1 along the traction groove 6213, and the other end of the traction element is connected with the trigger mechanism 623.

Specifically, one end of the traction member is connected with the anti-wear sleeve 6221 after penetrating into the traction hole 6212, the traction member penetrates into the hollow tube body of the push rod 1 along the traction groove 6213, and is finally connected with the trigger mechanism 623, and the traction groove 6213 is located at one side of the traction hole 6212 and extends along the length direction of the push rod joint 621.

The traction hole 6212 and the traction groove 6213 are used for guiding the traction piece, so that the interference between the traction piece and the front of the push rod 1 is reduced, and the blockage during unlocking is avoided.

Further, as shown in fig. 10, a spring positioning protrusion 6221c is disposed on the wear-proof sleeve 6221, a spring receiving groove (not shown) is disposed in the guide groove 6211, one end of the spring contacts with the spring receiving groove, and the other end of the spring is sleeved on the spring positioning protrusion 6221c of the wear-proof sleeve 6221.

The spring positioning protrusion 6221c is used for sleeving one end of the spring outside the spring positioning protrusion 6221c, the other end of the spring abuts against the spring accommodating groove of the guide groove 6211, and the spring positioning protrusion 6221c can avoid the spring from moving.

Optionally, a spring receiving groove may be formed in the wear-proof sleeve 6221, and a spring positioning protrusion may be disposed in the guide groove 6211.

In some embodiments of the present invention, as shown in fig. 1-3, the present invention further comprises a sleeve 7, the upper portion of the front leg tube 2 is fixedly connected to the sleeve 7, the push rod 1 penetrates the sleeve 7 and can slide relatively, and the second position of the surrounding tube 4 is hinged to the sleeve 7;

in the locked state, the sliding sleeve 61 and the sleeve 7 are close to each other;

in the unlocked state, the sliding sleeve 61 is moved along the front leg 2 in a direction away from the bushing 7.

Specifically, as shown in fig. 11, the sleeve 7 includes a third pipe 71, a fourth pipe 72 and a third hinge 73, and the third pipe 71 is fixedly connected to the upper portion of the front leg pipe 2; the fourth pipe 72 is sleeved outside the push rod 1 and can slide relatively; the third hinge 73 is hinged to the second position of the enclosure tube 4.

As shown in fig. 2, in the locked state, the sleeve 7 is close to the slide unlocking means 6;

in the unlocked state, the push rod 1 slides downwards relative to the sleeve 7 and pushes the sliding unlocking device 6 to slide downwards, and the front leg 2 is fixed with the sleeve 7, as shown in fig. 3. When the push rod 1 is turned downwards, the push rod 1 pushes the sleeve 7 downwards, and the sleeve 7 drives the front foot tube 2 to turn downwards and simultaneously drives the surrounding tube 4 to move downwards.

The sleeve 7 and the sliding sleeve 61 keep the push rod 1 and the forefoot tube 2 parallel to each other and are able to slide relative to each other. When the sleeve 7 is close to the sliding sleeve 61, the length of the extension part between the push rod 1 and the front foot tube 2 is longest; when the sleeve 7 is separated from the sliding sleeve 61 to the farthest distance, the length of the push rod 1 overlapped with the front foot pipe 2 is the shortest.

Further, as shown in fig. 2, the first position of the shroud pipe 4 is located on the front side of the second position. In fig. 2 the left side is the front side of the trolley frame and the right side is the rear side of the trolley frame.

The connecting rod 5 is positioned at the front side of the frame of the trolley, so that the enclosing pipe 4 is convenient to support, and the enclosing pipe 4 is placed to turn forwards in an unfolded state.

Preferably, the connecting rod 5 is a thin-wall piece, and has light weight and low cost under the condition of meeting the structural strength.

In some embodiments of the present invention, as shown in fig. 1-2, the sunshade rod assembly 10 is further included, and the sunshade rod assembly 10 is connected to the enclosing tube 4.

Specifically, the sunshade rod group 10 is fixedly connected with the surrounding pipe 4, and the sunshade rod group 10 moves along with the surrounding pipe 4.

As shown in fig. 1, the sunshade rod group 10 includes a first sunshade rod 101 and a second sunshade rod 102, and the first sunshade rod 101 is hinged to the second sunshade rod 102.

The sunshade rod group 10 is used for sleeving sunshade cloth (not shown), when sunshade is needed, the first sunshade rod 101 and the second sunshade rod 102 are rotated towards the direction away from each other, so that the sunshade cloth is unfolded, and the angle between the first sunshade rod 101 and the second sunshade rod 102 can be adjusted at will. When the sunshade is not required, the first sunshade rod 101 and the second sunshade rod 102 are rotated toward a direction in which they approach each other, folding the sunshade cloth, and simultaneously rotating the first sunshade rod 101 and the second sunshade rod 102 together to the rear side of the surrounding pipe 4.

When it is desired to fold the stroller, the first canopy rod 101 and the second canopy rod 102 can be rotated together to the rear side of the enclosure tube 4 so that the canopy cloth is folded and the set of canopy rods 10 follows the enclosure tube 4 to move downwards so that the stroller frame is folded to a minimum volume.

The utility model discloses a handcart frame's of preferred embodiment accomodates the process as follows:

as shown in fig. 2, in the unfolded state, the slide lock release 6 is locked to the head pipe 2, the push rod 1 is extended upward to the longest position with respect to the head pipe 2, and the shroud pipe 4 and the lower frame 8 are arranged in the horizontal direction.

As shown in fig. 3, when the trolley frame needs to be stored, the triggering mechanism 623 is pulled, the triggering mechanism 623 drives the pulling element, and the pulling element drives the latch hook set 622 to be disengaged from the slot 21 of the front foot tube 2, so that the sliding unlocking device 6 is unlocked from the front foot tube 2. Then, the push rod 1 is pushed downwards, the push rod 1 drives the sliding unlocking device 6 to slide downwards along the front foot pipe 2, the sliding unlocking device 6 drives the connecting rod 5 and the rear foot pipe 3 to move, and the connecting rod 5 drives the first position of the enclosing pipe 4 to move downwards; meanwhile, the upper part of the push rod 1 is turned backwards and downwards, the push rod 1 pushes the front foot pipe 2 to be turned backwards and downwards, and the front foot pipe 2 drives the second position of the enclosing pipe 4 to move downwards through the sleeve 7.

As shown in fig. 4, the stroller frame is stored in a minimum size, the push rod 1, the front foot pipe 2, the rear foot pipe 3, the enclosing pipe 4 and the lower frame 8 are horizontally arranged and overlapped, and the lengths of the push rod 1 and the front foot pipe 2 are also reduced to the minimum.

The utility model provides a handcart frame rational in infrastructure, receive the car process stable and can realize receiving the car fast.

What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.

Claims

1. A handcart frame comprises a push rod, a front foot tube, a rear foot tube, a lower frame and a surrounding tube, wherein the front side of the lower frame is hinged with the lower part of the front foot tube, the rear side of the lower frame is hinged with the lower part of the rear foot tube, the handcart frame is characterized by also comprising a connecting rod and a sliding unlocking device, and the upper part of the front foot tube is slidably hinged with the upper part of the rear foot tube through the sliding unlocking device;

the sliding unlocking device has at least two states:

2. A stroller frame according to claim 1, wherein said slide unlocking means comprises:

3. A stroller frame according to claim 2, wherein said locking assembly comprises: the push rod joint, the lock hook group, the traction piece, the spring and the trigger mechanism;

in an unlocking state, the trigger mechanism drives the lock hook group to retract into the guide groove through the traction piece and is separated from the slot.

4. The stroller frame of claim 3, wherein the latch set comprises a wear sleeve and an insert tab mounted at least partially within the wear sleeve.

5. The trolley frame as claimed in claim 4, wherein the wear-resistant sleeve comprises a body and a wear-resistant block, the body is provided with a mounting hole, one end of the insertion piece is inserted into the mounting hole, the wear-resistant block extends out from one side of the mounting hole and contacts with the insertion piece, and the wear-resistant block and the insertion piece can be inserted into the insertion slot together.

6. A stroller frame according to claim 2, further comprising a sleeve, an upper portion of said front leg tube being fixedly connected to said sleeve, said push rod extending through said sleeve and being slidable relative thereto, said second position of said shroud being hingedly connected to said sleeve;

in a locked state, the sliding sleeve and the sleeve are close to each other;

7. A cart frame according to claim 1, wherein said first position of said enclosure tube is forward of said second position.

8. The trolley frame as claimed in claim 3, wherein the push rod joint is provided with a traction hole and a traction groove, the traction hole is communicated with the guide groove, one end of the traction member passes through the traction hole and then is connected with the lock hook set in the guide groove, the traction member penetrates into the push rod along the traction groove, and the other end of the traction member is connected with the trigger mechanism.

9. The trolley frame as claimed in claim 4, wherein the wear sleeve is provided with a spring positioning protrusion, the guide groove is provided with a spring receiving groove, one end of the spring contacts with the spring receiving groove, and the other end of the spring is sleeved on the spring positioning protrusion on the wear sleeve.

10. A stroller frame according to claim 1, further comprising a set of sunshade rods, said set of sunshade rods being connected to said shroud tube.