CN214930027U

CN214930027U - Handrail assembly for a trolley frame and trolley frame

Info

Publication number: CN214930027U
Application number: CN202121187078.0U
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 handrail assembly for handcart frame, including push rod, push rod joint, slide bar and sliding sleeve, push rod and push rod joint fixed connection, the push rod joint inserts in the sliding sleeve, and the sliding sleeve can be followed the slide bar and slided, still includes locking device, and locking device includes locking state and unblock state at least: when in a locking state, the locking device locks the push rod joint and the sliding sleeve; when the sliding sleeve and the push rod joint slide to the limit position of the sliding rod towards the first direction and the locking device is unlocked and then is in an unlocked state, the push rod joint can further slide towards the first direction relative to the sliding sleeve. The utility model also discloses a handcart frame. The utility model discloses in after the locking device unblock, the push rod joint can further slide for the sliding sleeve for the articulated at least part of push rod stretches out from the sliding sleeve, further shortens the occupation space of push rod, reduces the packing volume of trolley frame, reduces packaging cost.

Description

Handrail assembly for a trolley frame and trolley frame

Technical Field

The utility model relates to a technical field of handcart especially relates to a handrail assembly and handcart frame for handcart frame.

Background

In the prior art, after the trolley frame is folded, the structure of the trolley frame is difficult to further contract, the volume is still large after the trolley is folded, and the packaging cost is influenced.

Therefore, it is necessary to design an armrest assembly for a trolley frame and a trolley frame that can further shrink the packing volume of the trolley frame, reducing the packing cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's not enough, provide a can further shrink the packing volume of trolley frame, reduce the handrail assembly and the trolley frame that are used for trolley frame of packaging cost.

The technical scheme of the utility model a handrail assembly for handcart frame is provided, including push rod, push rod joint, slide bar and sliding sleeve, the push rod with push rod joint fixed connection, the push rod joint inserts in the sliding sleeve, the sliding sleeve can be followed the slide bar slides, still includes locking device, locking device includes locking state and unlocking state at least:

when in a locking state, the locking device locks the push rod joint and the sliding sleeve;

when the sliding sleeve and the push rod joint slide to the limit position of the sliding rod towards the first direction and the locking device is unlocked and then is in an unlocking state, the push rod joint can further slide towards the first direction relative to the sliding sleeve.

Furthermore, the locking device comprises a lock pin, a spring and a lock groove, the lock pin is telescopically mounted on the push rod joint through the spring, and the lock groove is formed in the sliding sleeve;

in a locking state, the spring pushes the lock pin into the lock groove;

in the unlocking state, the lock pin is pressed and is disengaged from the lock groove.

Furthermore, a guide groove is formed in the sliding sleeve, and when the lock pin moves towards the lock groove, the guide groove is used for compressing the lock pin and guiding the lock pin into the lock groove.

Further, the guide groove comprises a guide inclined plane, and the guide inclined plane is positioned on the inner wall of the sliding sleeve and gradually inclines from outside to inside.

Furthermore, the outer end of the push rod joint is provided with a limiting bulge, and the sliding sleeve is also provided with a limiting groove;

when the lock pin is inserted into the lock groove, the limiting protrusion enters the limiting groove.

Furthermore, the bottom of the limiting groove is provided with a guide groove, and when the lock pin moves towards the lock groove, the guide groove is used for compressing the lock pin and guiding the lock pin into the lock groove.

The utility model also provides a handcart frame, including front leg, back leg and wheel, the wheel is installed in the front leg with the lower part of back leg, still include the handrail subassembly of any one of the above-mentioned, the slide bar is the front leg, the sliding sleeve includes first pipe fitting and second pipe fitting, the push rod joint inserts in the first pipe fitting, the upper portion of front leg inserts in the second pipe fitting, the upper portion of back leg is articulated with the second pipe fitting;

the trolley frame at least comprises an unfolding state, a containing state and a packaging state:

when the locking device is in a locking state in the unfolding state, the front foot tube and the sliding sleeve are relatively fixed;

when the pipe fitting is in the storage state, the locking device is still in the locking state, the second pipe fitting slides to the lower part of the front foot pipe, and the push rod is driven to contract towards the direction of the front foot pipe;

when the package state, locking device is in the unblock state, the push rod joint at least part follow slide out in the first pipe fitting to drive the push rod further shrink.

Further, the lock hook group is installed in the push rod joint;

when the front foot tube is unfolded, the front foot tube and the sliding sleeve are locked by the lock hook group;

when the storage state is realized, the lock hook group unlocks the front foot tube and the sliding sleeve.

Furthermore, 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, and a slot for inserting the lock hook group is formed in the front foot tube.

The foldable foot tube is characterized by further comprising a containing positioning piece and a containing positioning bulge, wherein the containing positioning piece is installed at the lower part of the rear foot tube, and the containing positioning bulge is installed on the push rod;

when in the storage state, the storage positioning piece is hung on the storage positioning bulge;

before the locking device is unlocked, the accommodating positioning piece is separated from the accommodating positioning bulge.

Further, the packaging box comprises a sleeve, the sleeve is fixedly connected with the upper end of the front foot tube, the push rod is inserted into the sleeve and can slide along the sleeve, and the accommodating and positioning protrusion slides to a position contacting with the sleeve in the packaging state.

Further, the sleeve comprises a third pipe and a fourth pipe, the third pipe is fixedly connected with the upper end of the front foot pipe, and the fourth pipe is sleeved outside the push rod and can slide relatively.

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

the utility model discloses in after sliding to the extreme position of slide bar towards the first direction sliding of sliding sleeve and push rod joint to after the locking device unblock, the push rod joint can further slide for the sliding sleeve, makes the articulated at least part of push rod stretch out from the sliding sleeve, further shortens the occupation space of push rod, reduces the packing volume of trolley frame, reduces packaging cost.

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 an expanded view of a cart frame according to an embodiment of the present invention;

fig. 2 is a view illustrating a storage state of a frame of a handcart according to an embodiment of the present invention;

FIG. 3 is a schematic view of the stroller frame in an assembled state according to an embodiment of the present invention;

fig. 4 is a view illustrating a locking state of the handle assembly according to an embodiment of the present invention;

fig. 5 is an unlocked state diagram of the armrest assembly according to an embodiment of the present invention;

fig. 6 is an exploded view of the push rod knuckle and locking device in an embodiment of the present invention;

fig. 7 is a perspective view of one of the sliding sleeves according to an embodiment of the present invention;

fig. 8 is a perspective view of another sliding sleeve according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a sliding sleeve according to an embodiment of the present invention;

FIG. 10 is a schematic view of the locking of the push rod joint and the forefoot tube according to an embodiment of the present invention;

fig. 11 is a schematic view illustrating the unlocking of the push rod joint and the front leg tube according to an embodiment of the present invention;

fig. 12 is an exploded view of the push rod knuckle and latch hook set in an embodiment of the present invention;

fig. 13 is a perspective view of the sleeve according to an embodiment of the present invention.

Reference symbol comparison table:

a push rod 1;

the push rod joint 2: the limiting protrusion 21, the locking hook group 22, the guide groove 23, the telescopic hole 24, the anti-abrasion sleeve 221, the insertion piece 222, the body 2211, the anti-abrasion block 2212 and the mounting hole 2213;

a sliding sleeve 3: the first pipe fitting 31, the second pipe fitting 32, the guide groove 33, the limit groove 34, the through hole 311 and the guide inclined surface 331;

the locking device 4: lock pin 41, spring 42, lock groove 43;

front leg tube 5: a slot 51;

a rear foot tube 6, wheels 7 and a trigger mechanism 8;

and (3) a sleeve 8: a third pipe 81, a fourth pipe 82;

a storage positioning piece 91 and a storage positioning projection 92.

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.

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

The first embodiment is as follows:

as shown in fig. 4-5, the armrest assembly for a trolley frame comprises a push rod 1, a push rod joint 2, a slide rod, a sliding sleeve 3, a locking device 4, and a locking mechanism, wherein the push rod 1 is fixedly connected with the push rod joint 2, the push rod joint 2 is inserted into the sliding sleeve 3, the sliding sleeve 3 can slide along the slide rod, and the locking mechanism 4 at least comprises a locking state and an unlocking state:

in the locking state, the locking device 4 locks the push rod joint 2 and the sliding sleeve 3;

when the locking device 4 is unlocked and is in an unlocked state after the sliding sleeve 3 and the push rod joint 2 slide to the extreme position of the sliding rod towards the first direction, the push rod joint 2 can further slide towards the first direction relative to the sliding sleeve 3.

In this embodiment, the slide bar is a front leg 5 of the frame of the trolley.

Specifically, the push rod joint 2 is inserted into the end head of the push rod 1 and fixedly connected with the end head, the push rod joint 2 and the push rod 1 are always kept relatively immobile, the end heads of the push rod joint 2 and the push rod 1 are inserted into the sliding sleeve 3 together, and the push rod 1 and the sliding sleeve 3 are in clearance fit and can slide relatively.

As shown in fig. 4, the locking device 4 is in a locked state, and the locking device 4 locks the pusher knuckle 2, the pusher 1, and the sliding sleeve 3.

As shown in fig. 5, the locking device 4 is in an unlocked state, the push rod joint 2 and the push rod 1 can slide relative to the sliding sleeve 3, and at least part of the push rod 1 and the push rod joint 2 can slide forwards.

As shown in fig. 2, in the storage state of the stroller frame, after the sliding sleeve 3 and the push rod joint 2 slide to the limit position of the front foot pipe 5 in the first direction (i.e. the left side of fig. 2), the stroller frame is folded to a smaller volume by the folding cart, which is convenient for storage and movement. At this time, when the locking device 4 is in the locked state, the push rod 1 and the push rod joint 2 are locked with the slide sleeve 3, and the right end of the push rod 1 is not close to the rear wheel 7.

As shown in fig. 3, the locking device 4 is unlocked, and then the push rod 1 is pushed to the left side (i.e. the front side of the trolley frame), the push rod 1 and the push rod joint 2 at least partially slide out of the sliding sleeve 3, the right end of the push rod 1 is close to the rear wheel 7, the occupied space of the push rod 1 is further shortened, the packaging volume of the trolley frame is reduced, and the packaging cost is reduced.

Alternatively, the tail part of the push rod joint 2 can also be connected to the end head of the push rod 1, and the head part of the push rod joint 2 is directly inserted into the sliding sleeve 3 and locked with the sliding sleeve 3 through the locking device 4.

Further, as shown in fig. 5-6, the locking device 4 includes a lock pin 41, a spring 42 and a lock slot 43, the lock pin 41 is telescopically mounted on the push rod joint 2 through the spring 42, and the lock slot 43 is opened on the sliding sleeve 3;

in the locked state, the spring 42 pushes the lock pin 41 into the lock groove 43;

in the unlocked state, the lock pin 41 is pressed and released from the lock groove 43.

Specifically, a telescopic hole 24 is formed in the push rod joint 2, one end of a lock pin 41 penetrates out of the telescopic hole 24, and the other end of the lock pin 41 is in contact with a spring 42.

After the push rod knuckle 2 is inserted into the push rod 1, the lock pin 41 is passed out of the push rod 1, and the spring 42 is in contact with the inner wall of the push rod 1.

The locking groove 43 is opened on the sliding sleeve 3, when the lock pin 41 is aligned with the locking groove 43, the spring 42 pushes the lock pin 41 into the locking groove 43, so as to realize the locking of the locking device 4, so that the push rod joint 2 and the sliding sleeve 3 are locked, and the push rod 1 cannot slide out.

When the push rod 1 needs to be pushed out, the lock pin 41 is pressed, the spring 42 is compressed, the lock pin 41 is disengaged from the lock groove 43, then the push rod 1 is pushed, the push rod 1 and the push rod joint 2 slide out of the sliding sleeve 3, and the lock pin 41 is reset under the action of the spring 42.

When the push rod joint 2 needs to be locked with the sliding sleeve 3 again, the push rod 1 is pushed reversely, the lock pin 41 is pressed into the sliding sleeve 3 and is abutted against the inner wall of the sliding sleeve 3, and when the lock pin 41 is aligned with the lock groove 43 again, the lock pin 41 is inserted into the lock groove 43, so that the locking between the push rod joint 2 and the sliding sleeve 3 is realized.

The locking pin 41 and the locking groove 43 are matched, so that the unlocking of the locking device 4 is easy to operate by a user, the returning operation is convenient, and the unlocking operation can be realized only by pulling the push rod 1 reversely.

Further, as shown in fig. 7, the sliding sleeve 3 is provided with a guide groove 33, and when the lock pin 41 moves toward the lock groove 43, the guide groove 33 is used to compress and guide the lock pin 41 into the lock groove 43.

Specifically, the guide groove 33 is located on the inner wall of the edge of the sliding sleeve 3, the lock pin 41 is cylindrical, and the guide groove 33 is an arc-shaped groove. When the push rod 1 is pulled reversely, the lock pin 41 contacts with the edge of the sliding sleeve 3 and then slides into the guide groove 33, and the guide groove 33 enables the lock pin 41 to be easily compressed to smoothly slide into the sliding sleeve 3. Since the locking groove 43 is a through hole structure opened on the sliding sleeve 3, when the lock pin 41 slides along the inner wall of the sliding sleeve 3 to the position of the locking groove 43, the lock pin 41 protrudes again and is inserted into the locking groove 43.

Preferably, as shown in fig. 8, the guide groove 33 includes a guide slope 331, and the guide slope 331 is located on the inner wall of the sliding sleeve 3 and gradually inclines from the outside to the inside.

The guiding inclined plane 331 gradually inclines from outside to inside along the radial direction of the sliding sleeve 3, that is, the guiding inclined plane 331 has a thicker thickness near the locking groove 43 and a thinner thickness near the edge of the sliding sleeve 3. The locking pin 41 is first contacted with the position with a small thickness, then gradually pushed by the guiding inclined plane 331, and finally completely enters the inside of the sliding sleeve 3.

Further, as shown in fig. 4-5, the outer end of the push rod joint 2 is provided with a limit protrusion 21, and the sliding sleeve 3 is also provided with a limit groove 34;

when the lock pin 41 is inserted into the lock groove 43, the stopper projection 21 enters the stopper groove 34.

Specifically, the limiting protrusion 21 is arranged at the outer end of the push rod joint 2 and protrudes outward in the radial direction, the limiting groove 34 is arranged at the edge of the sliding sleeve 3, and the shape of the limiting groove 34 is matched with the shape of the limiting protrusion 21.

When the lock pin 41 is inserted into the lock groove 43, the limiting protrusion 21 enters the limiting groove 34, and the limiting protrusion 21 and the limiting groove 34 play a positioning role, so that the lock pin 41 is aligned with the lock groove 43; meanwhile, the limiting protrusion 21 and the limiting groove 34 also prevent the push rod 1 from being pulled backward further, and when the pulling force is too large, the lock pin 41 is not inserted into the lock groove 43 yet, so that the push rod 1 is prevented from being pulled backward excessively and being pulled out of the sliding sleeve 3.

Preferably, as shown in fig. 7 to 8, the bottom of the stopper groove 34 is provided with a guide groove 33, and the guide groove 33 serves to compress and guide the lock pin 41 into the lock groove 43 when the lock pin 41 moves toward the lock groove 43.

As shown in fig. 5, the stopper projection 21 and the lock pin 41 on the pusher knuckle 2 are located on the same straight line in the longitudinal direction.

As shown in fig. 8, the guide groove 33 is located inside the stopper groove 34.

When the push rod 1 is pulled backward, the lock pin 41 is restricted to the contact of the guide groove 33, and the lock pin 41 is guided to the inner wall of the slide sleeve 3.

When the lock pin 41 is inserted into the lock groove 43, the stopper projection 21 slides into the stopper groove 34 and is restricted in this position by the stopper groove 34.

In this embodiment, when the locking device 4 unlocks the push rod joint 2 and the sliding sleeve 3, the push rod 1 can be further compressed to occupy a length, so that the packaging volume of the frame of the trolley is reduced, and the packaging cost is reduced. When the locking device 4 locks the push rod joint 2 and the sliding sleeve 3, the push rod 1 is fixedly connected with the sliding sleeve 3, and the connection requirement of the handcart frame during use is met.

Example two:

as shown in fig. 1 to 3, the trolley frame comprises a front leg tube 5, a rear leg tube 6 and a wheel 7, wherein the wheel 7 is mounted at the lower part of the front leg tube 5 and the rear leg tube 6, and further comprises an armrest assembly in the first embodiment and the modification thereof, the sliding sleeve 3 comprises a first pipe 31 and a second pipe 32, the push rod joint 2 is inserted into the first pipe 31, the upper part of the front leg tube 5 is inserted into the second pipe 32, and the upper part of the rear leg tube 6 is hinged with the second pipe 32;

the handcart frame at least comprises an unfolding state, a containing state and a packaging state:

when the sliding sleeve is unfolded, the locking device 4 is in a locking state, and the front foot tube 5 and the sliding sleeve 3 are relatively fixed;

when in the storage state, the locking device 4 is still in the locking state, the second pipe fitting 32 slides to the lower part of the front foot pipe 5, and drives the push rod 1 to contract towards the direction of the front foot pipe 5;

in the packing state, the locking device 4 is in the unlocking state, and the push rod joint 2 slides out from the first pipe fitting 31 at least partially and drives the push rod 1 to further contract.

Specifically, the handcart frame comprises two front foot tubes 5, two rear foot tubes 6 and four wheels 7, wherein the two wheels 7 are respectively connected with the lower parts of the two front foot tubes 5, and the two wheels 7 are respectively connected with the lower parts of the two rear foot tubes 6.

As shown in fig. 1, the trolley frame is in an unfolded state, i.e. in a use state. At this time, the push rod 1 and the front foot pipe 5 relatively extend to the longest length, and the push rod 1 is convenient for a user to hold to push the handcart frame. The push rod 1 and the push rod knuckle 2 are inserted into the first tube 31 of the sliding sleeve 3 and are fixedly connected by the locking device 4. The upper portion of the front leg tube 5 is inserted into the second tube member 32 and remains relatively fixed. The upper part of the rear foot tube 6 is hinged with the outer wall of the second tube member 32.

As shown in fig. 2, the cart frame is in a stored state. The front foot tube 5 and the second tube 32 slide relatively to each other, so that the sliding sleeve 3 slides into the lower part of the front foot tube 5, and the sliding sleeve 3 drives the rear foot tube 6 to slide downwards together. At this moment, the locking device 4 is still in a locking state, and the push rod 1 and the push rod joint 2 are fixedly connected with the sliding sleeve 3, slide downwards together with the sliding sleeve 3 and turn backwards. So that the overlap between the push rod 1 and the forefoot tube 5 is contracted to a shorter length.

As shown in fig. 3, the trolley frame is in a packed state, so that the occupied space of the push rod 1 can be further reduced. The locking device 4 unlocks the push rod joint 2 and the sliding sleeve 3, the push rod 1 and the push rod joint 2 slide forwards relative to the sliding sleeve 3, the right side of the push rod 1 is close to the rear wheel 7, and the occupied space of the frame of the trolley is further compressed.

When the frame of the handcart needs to be unfolded again, the push rod 1 is pulled backwards in the opposite direction, so that the locking device 4 locks the push rod joint 2 and the sliding sleeve 3 again, and the frame of the handcart returns to the storage state shown in fig. 2.

Then, the push rod 1 is turned upwards again, and the push rod 1 is continuously pulled, the push rod 1 drives the sliding sleeve 3 to slide upwards along the front foot tube 5, and the sliding sleeve 3 drives the upper part of the rear foot tube 6 to move upwards. Finally, returning to the deployed state of fig. 1, the sliding sleeve 3 and the front leg 5 are locked and kept relatively fixed, so that the stroller frame is kept in the deployed state.

Further, as shown in fig. 10-11, it also includes a latch hook set 22 installed in the push rod knuckle 2;

in the unfolded state, the locking hook group 22 locks the front foot tube 5 and the sliding sleeve 3;

in the storage state, the locking hook set 22 unlocks the front leg tube 5 and the sliding sleeve 3.

Specifically, as shown in fig. 10, the locking hook set 22 is telescopically installed in the push rod joint 2, and when the locking hook set 22 extends out, it is inserted into the front foot tube 5, so as to lock the front foot tube 5 and the sliding sleeve 3, and keep the stroller frame in the unfolded state.

As shown in fig. 9, the latch hook set 22 extends through the through hole 311 between the first tube 31 and the second tube 32, and then is inserted into the front leg 5 in the second tube 32.

As shown in fig. 11, after the latch hook group 22 retracts into the push rod joint 2, the sliding sleeve 3 and the front foot tube 5 can slide relatively, and in the storage state, the sliding sleeve can slide downwards along the front foot tube 5, so as to realize the operation of vehicle storage.

Further, as shown in fig. 12, a guide groove 23 is opened in the push rod joint 2, the latch hook group 22 is disposed in the guide groove 23 and can perform telescopic movement with respect to the guide groove 23, and an insertion groove 51 into which the latch hook group 22 is inserted is disposed on the front leg tube 5.

Specifically, the locking mechanism further comprises a spring and a pulling member (not shown), wherein the spring is installed between the locking hook group 22 and the guide groove 23, and the pulling member is connected between the triggering mechanism 8 (see fig. 1) and the locking hook group 22.

Preferably, the traction member may be a steel wire rope, one end of which is connected with the triggering mechanism 8, and the other end of which is connected with the locking hook group 22.

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 locking hook set 22.

In this embodiment, the trigger mechanism 8 is installed on the upper portion of the push rod 1, so that the user can operate the trigger mechanism 8 conveniently, and the trigger mechanism 8 can be triggered by pressing, pulling or rotating by the user.

Alternatively, the trigger mechanism 8 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 hook latch 22 outward, so that a portion of the hook latch 22 protrudes from the guide groove 23 and is inserted into the insertion groove 51.

When the lock is unlocked, the trigger mechanism 8 is pulled, the trigger mechanism 8 drives the traction piece, the traction piece drives the lock hook group 22 to retract into the guide groove 23, the slot 51 in the lock hook group 22 is separated, and at the moment, the lock hook group 22 compresses the spring.

Further, as shown in fig. 12, the latch hook set 22 includes a wear sleeve 221 and an insert 222, and the insert 222 is at least partially installed in the wear sleeve 221.

Specifically, the insert 222 is made of metal and the wear sleeve 221 is made of plastic. A part of the insertion sheet 222 is inserted into the anti-wear sleeve 221, the anti-wear sleeve 221 is installed in the guide groove 23, the other part of the insertion sheet 222 can be inserted into the insertion groove 51, and the insertion sheet 222 made of metal has sufficient rigidity, so that the push rod 1 can be stably locked on the front foot tube 5, and the unlocking of the sliding sleeve 3 caused when the push rod 1 is pushed downwards by a large force is avoided.

Further, as shown in fig. 12, the wear-resistant sleeve 221 includes a body 2211 and a wear-resistant block 2212, a mounting hole 2213 is opened on the body 2211, one end of the insertion sheet 222 is inserted into the mounting hole 2213, the wear-resistant block 2212 extends out from one side of the mounting hole 2213 and contacts with the insertion sheet 222, and the wear-resistant block 2212 and the insertion sheet 222 can be inserted into the insertion slot 51 together.

The wear block 2212 is used to protect the sidewalls of the slot 51 and prevent the insert 222 from wearing the slot 51.

Further, as shown in fig. 1-3, the foldable foot tube comprises a receiving positioning piece 91 and a receiving positioning projection 92, wherein the receiving positioning piece 91 is installed at the lower part of the rear foot tube 6, and the receiving positioning projection 92 is installed on the push rod 1;

in the storage state, the storage positioning piece 91 is hung on the storage positioning projection 92;

before the lock device 4 is unlocked, the housing positioning piece 91 is separated from the housing positioning projection 92.

Specifically, as shown in fig. 1, in the unfolded state, the storage positioning piece 91 is located at the lower portion of the rear leg tube 6, and the storage positioning projection 92 is located at a position close to the upper portion of the push rod 1, with the two separated from each other.

As shown in fig. 2, in the storage state, the storage positioning plate 91 is hung on the storage positioning protrusion 92, a hanging hole (not shown) is formed in the storage positioning plate 91, and the storage positioning protrusion 92 enters the hanging hole, so that the cart frame is kept in the storage state and is not easy to loosen.

As shown in fig. 3, before the locking device 4 is unlocked, the storage positioning plate 91 is separated from the storage positioning protrusion 92, then the locking device 4 is unlocked, the push rod 1 is further pushed forward, and the handcart frame enters a packaging state.

Accomodate spacer 91 and accomodate location arch 92 and make the handcart frame keep in the state of accomodating, be convenient for be used for standing up the handcart frame after folding for the wheel 7 of two front sides lands, and the wheel 7 of rear side is unsettled, then pulls push rod 1 and removes the handcart frame, and the handcart frame is in the removal in-process, is difficult for loosely.

During packaging, in order to further shorten the length of the frame of the trolley, the storage positioning piece 91 and the storage positioning protrusion 92 need to be separated first, so that the push rod 1 can be further pushed forward, and the overall length of the frame of the trolley is shortened. After the push rod 1 is further moved, the entire trolley frame is inserted into a packing box for keeping the trolley frame in a packed state.

Further, as shown in fig. 1-3, the foldable bicycle further comprises a sleeve 8, the sleeve 8 is fixedly connected with the upper end of the front foot tube 5, the push rod 1 is inserted into the sleeve 8 and can slide along the sleeve 8, and the accommodating and positioning protrusion 92 slides to a position contacting with the sleeve 8 in a packaging state.

Specifically, as shown in fig. 1-2, in the process of switching the stroller frame from the unfolded state to the stored state, the push rod 1 slides relative to the sleeve 8, the sleeve 8 is fixedly connected with the upper end of the front foot pipe 5, and in the process of rotating and folding the front foot pipe 5, the sleeve 8 moves downward along with the front foot pipe 5.

The sleeve 8 on the one hand makes the structural stability between forepoling 5 and push rod 1 promote, folds up the in-process, and is more stable.

On the other hand, as shown in fig. 3, in the packaged state, the push rod 1 further slides forward, the accommodating positioning protrusion 92 slides to the position contacting with the sleeve 8, and is limited by the sleeve 8, so that excessive secondary sliding of the push rod 1 is avoided, the push rod 1 just contacts with the rear wheel 7, and the length of the whole trolley frame is shortened to the minimum.

Further, as shown in fig. 13, the sleeve 8 includes a third pipe 81 and a fourth pipe 82, the third pipe 81 is fixedly connected to the upper end of the front leg pipe 5, and the fourth pipe 82 is sleeved outside the push rod 1 and can slide relatively.

Specifically, the centers of the third pipe 81 and the second pipe 32 are aligned, the third pipe 81 is fixedly connected with the front leg pipe 5, and the second pipe 32 is sleeved outside the front leg pipe 5 and can slide relative to the front leg pipe 5; the fourth pipe 82 is aligned with the center of the first pipe 31, the first pipe 31 is connected with the push rod joint 2 through the locking device 4, and the fourth pipe 82 is sleeved outside the push rod 1 and can slide relative to the push rod 1.

The sleeve 8 and the sliding sleeve 3 keep the push rod 1 and the front foot tube 5 parallel to each other at all times and can slide towards the direction away from or close to each other.

Through implementing this embodiment, can realize that the handcart car frame further compresses under the packing state and occupies the volume, reduce packaging cost.

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. An armrest assembly for a frame of a trolley, comprising a push rod, a push rod joint, a slide rod and a slide sleeve, wherein the push rod is fixedly connected with the push rod joint, the push rod joint is inserted into the slide sleeve, and the slide sleeve can slide along the slide rod, the armrest assembly further comprising a locking device, wherein the locking device at least comprises a locking state and an unlocking state:

2. The armrest assembly of claim 1 wherein the locking device comprises a locking pin, a spring, and a locking slot, the locking pin being telescopically mounted on the push rod knuckle by the spring, the locking slot being open on the sliding sleeve;

in a locking state, the spring pushes the lock pin into the lock groove;

3. The armrest assembly of claim 2 wherein the sliding sleeve defines a guide slot for compressing and guiding the locking pin into the locking slot as the locking pin moves toward the locking slot.

4. The armrest assembly of claim 3 wherein the guide slot includes a guide ramp located on an inner wall of the sliding sleeve and tapering from outside to inside.

5. The armrest assembly according to claim 2, wherein the outer end of the push rod joint is provided with a limit protrusion, and the sliding sleeve is further provided with a limit groove;

6. The armrest assembly of claim 5 wherein a guide slot is provided in a bottom of the limit slot for compressing and guiding the locking pin into the locking slot as the locking pin moves toward the locking slot.

7. A stroller frame comprising a front leg, a rear leg and a wheel, said wheel being mounted on a lower portion of said front leg and said rear leg, said stroller frame further comprising the armrest assembly of any one of claims 1-6, said slide bar being said front leg, said slide sleeve comprising a first tubular member and a second tubular member, said push rod knuckle being inserted into said first tubular member, an upper portion of said front leg being inserted into said second tubular member, an upper portion of said rear leg being hingedly connected to said second tubular member;

8. The stroller frame of claim 7, further comprising a receiving positioning piece and a receiving positioning protrusion, wherein the receiving positioning piece is mounted on the lower portion of the rear foot tube, and the receiving positioning protrusion is mounted on the push rod;

9. The trolley frame as claimed in claim 8, further comprising a sleeve fixedly coupled to an upper end of the front leg tube, the push rod being inserted into and slidable along the sleeve, the receiving and positioning protrusion being slid to a position contacting the sleeve in the packaged state.

10. A cart frame according to claim 9, wherein said sleeve includes a third tubular member fixedly connected to an upper end of said front leg tube and a fourth tubular member slidably received over an outer portion of said push rod.