CN216915978U - Foldable stroller frame - Google Patents

Abstract

The utility model provides a foldable stroller frame, which comprises: the folding frame comprises an upper push rod, a connecting piece, a front wheel frame fixing rod and a lower push rod, one end of the upper push rod is slidably mounted in the lower push rod, and a top block is arranged at the top of the upper push rod, which is positioned in the lower push rod; the connecting piece is sleeved and fixed on the lower push rod, and a first clamping component is arranged on the connecting piece; the front wheel frame fixing rod penetrates through the connecting piece and is in sliding connection with the connecting piece, and the other end of the front wheel frame fixing rod is fixedly connected with the front wheel frame; the foldable stroller frame is small in size and convenient to store.

Description

Foldable stroller frame

Technical Field

The utility model relates to a foldable stroller frame, and belongs to the technical field of strollers.

Background

The existing stroller generally comprises a stroller frame with unfolding and folding functions, a front wheel assembly and a rear wheel assembly which are arranged at the lower part of the stroller frame, a human body supporting device which is arranged on the stroller frame and can support a human body, and a locking mechanism for locking the stroller frame at an unfolding position. Nowadays, the cart frame is diversified, but the volume is great after folding, accomodates inconveniently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a foldable stroller frame which is small in size and convenient to store.

The technical scheme for solving the technical problems is as follows: a foldable stroller frame comprising: the front wheel frame and the rear wheel frame are respectively provided with the wheel correspondingly,

the folding frame comprises an upper push rod, a connecting piece, a front wheel frame fixing rod and a lower push rod, one end of the upper push rod is slidably mounted in the lower push rod, and a top block is fixedly arranged at the top of one end of the upper push rod, which is positioned in the lower push rod; the connecting piece is sleeved and fixed at one end, far away from the upper push rod, of the lower push rod, and a first clamping assembly is mounted on the connecting piece; one end of the front wheel frame fixing rod penetrates through the connecting piece and is in sliding connection with the connecting piece, and the other end of the front wheel frame fixing rod is fixedly connected with the front wheel frame; a through hole is formed in the lower push rod at a position corresponding to the first clamping assembly, a limiting hole is formed in the front wheel carrier fixing rod, the first clamping assembly can sequentially penetrate through the limiting hole and the through hole, the top block can push the first clamping assembly out of the through hole, an inclined plane is formed around the top of the first clamping assembly, when the upper push rod is contracted, the lower push rod and one end of the front wheel carrier fixing rod can slide relatively, the lower push rod and the front wheel carrier fixing rod are unlocked, and the rear wheel carrier is rotatably connected to the lower push rod; and two ends of the seat plate component are respectively arranged on the connecting piece and the lower push rod.

The beneficial effects of the utility model are: the upper push rod can be slidably arranged in the lower push rod, and the upper push rod and the lower push rod can be folded; the connecting piece is fixed on the lower push rod, the front wheel frame fixing rod is connected on the connecting piece in a sliding manner, and the front wheel frame fixing rod and the lower push rod can be folded; the rear wheel carrier is rotationally connected to the lower push rod, so that the folding is convenient; when folding, the upper push rod slides in the lower push rod, the kicking block is the inside ejecting via hole of first joint subassembly follow lower push rod, first joint subassembly top is the inclined plane all around, remove the front wheel frame dead lever, spacing hole edge and the contact of first joint subassembly inclined plane, with the ejecting spacing hole of first joint subassembly, make front wheel frame dead lever one end and lower push rod relative slip, unblock lower push rod and front wheel frame dead lever, fold this frame, with the upper push rod, the three bracing piece of lower push rod and front wheel frame dead lever is folded into a bracing piece length, and is small in size, and convenient storage.

On the basis of the technical scheme, the utility model can be further improved as follows.

Further, first joint subassembly includes joint, first spring and connecting axle, correspond in the connecting piece first spout is seted up to the via hole, joint slidable mounting is in the first spout, the overhead edge of joint a slot hole is seted up to first spout slip direction, the connecting axle passes slot hole and both ends are fixed first spout both sides, first spring one end is fixed joint bottom, the other end are fixed first spout bottom makes the joint has the trend of passing the via hole all the time, the joint top is the inclined plane all around.

The beneficial effect of adopting the further scheme is as follows: the clamping head is slidably arranged in the first sliding groove, the connecting shaft penetrates through the long hole, and two ends of the connecting shaft are fixed on two sides of the first sliding groove, so that the sliding direction of the clamping head can be limited, and the clamping head can penetrate through the through hole; the first spring can enable the clamping joint to always have a tendency of penetrating through the through hole, so that when the frame is unfolded, the clamping joint is inserted into the through hole and the limiting hole, and the lower push rod and the front wheel frame fixing rod are locked; the periphery of the top of the clamping head is provided with an inclined plane, when the inclined plane is contacted with the inner wall of the via hole, the clamping head can be completely ejected out of the via hole by moving the lower push rod, the structure is simple, and the folding is convenient.

Further, the joint comprises a clamping block and a connecting block, the periphery of the top of the clamping block is an inclined plane, the top of the connecting block is fixedly connected with the bottom of the clamping block, the connecting block is arranged along the sliding direction of the first sliding groove, the long hole is formed in the sliding direction of the first sliding groove, the number of the first springs is two, one end of each first spring is fixedly connected with the bottom of the clamping block, the other end of each first spring is fixedly connected with the bottom of the first sliding groove, and the first springs are symmetrically arranged on the two sides of the connecting block.

The beneficial effect of adopting the further scheme is as follows: the two first springs are symmetrically arranged on two sides of the connecting block, so that the clamping block is stressed in a balanced manner, and the sliding is more stable; the long holes are formed in the connecting blocks, so that the connecting blocks are simpler and more convenient to install.

Further, the middle part of the front wheel frame fixing rod is a flat plate surface, the flat plate surface is provided with the limiting hole, and the flat plate surface is attached to the outer surface of the lower push rod.

Adopt the beneficial effect of above-mentioned further scheme: the plane plate can be tightly attached to the outer surface of the lower push rod, so that the fixture block can be more easily inserted into and ejected out of the limiting hole; the clamping block penetrates through the limiting hole and the through hole, the front wheel frame fixing rod and the lower push rod are locked, and the frame is unfolded.

Further, still include the handle subassembly, the handle subassembly includes handrail, folding switch, copper wire and second joint subassembly, the handrail is fixed the push up rod tip, folding switch rotates the setting and is in on the handrail, a perforation has been seted up on the push up rod, correspond in the push up rod the second spout is seted up in the perforation, second joint subassembly slides and sets up in the second spout, second spout bottom is seted up one and is used for the through-hole that the copper wire passed, follow on the lower push rod a plurality of joint holes are seted up to upper push rod slip direction, the perforation can with every the joint hole corresponds, copper wire one end with folding switch fixed connection, the other end with second joint subassembly fixed connection, second joint subassembly can be worn out the perforation is inserted in the joint hole.

The beneficial effect of adopting the further scheme is as follows: the second clamping assembly slides in the second sliding chute, penetrates through the through hole and any one of the clamping holes, locks the upper push rod and the lower push rod, and unfolds the frame; pressing the folding switch, pulling the copper wire, the copper wire pulling second joint subassembly is pulled out from perforation and joint hole, unblock push rod and push rod down, slides push rod, folding frame.

Further, the folding switch comprises a key and a second spring, the key is rotatably arranged on the handrail, one end of the steel wire is fixed on the key, one end of the second spring is fixed on the handrail, and the other end of the second spring is fixed on the key and used for enabling the key to reset.

The beneficial effect of adopting the further scheme is as follows: the second spring drives the key to reset, and the structure is simple and the operation is convenient.

Furthermore, the second joint subassembly includes that the joint is protruding and the third spring, the protruding slip of joint sets up in the second spout, third spring one end is fixed second spout bottom, and the other end is fixed the protruding bottom of joint, the copper wire passes the third spring is fixed the protruding bottom of joint, the third spring is in compression state all the time.

Adopt the beneficial effect of above-mentioned further scheme: the clamping bulge is arranged in the second sliding groove in a sliding mode, penetrates through the through hole and the clamping hole under the action of the third spring, and locks the lower push rod and the upper push rod; pressing the key, pulling the steel wire, pulling the clamping protrusion out of the through hole and the clamping hole by the steel wire, unlocking the lower push rod and the upper push rod, sliding the upper push rod, and folding the frame; the third spring is in compression state all the time, slides the push rod, and when perforating and joint pore pair, perforation and joint hole are worn out automatically to the joint arch, simple structure, convenient operation.

The seat plate fixing piece is sleeved and arranged on the lower push rod in a sliding mode, and one end, far away from the front wheel frame, of the front wheel frame fixing rod penetrates through the connecting piece to be fixed on the seat plate fixing piece.

The beneficial effect of adopting the further scheme is as follows: the seat plate fixing piece is used for fixing one end, far away from the front wheel frame, of the front wheel frame fixing rod, so that the front wheel frame fixing rod can slide on the connecting piece more smoothly and is not easy to clamp.

Further, still include first cutting ferrule and second cutting ferrule, the fixed cover of first cutting ferrule is established on the last push rod, prevent that the last push rod breaks away from the lower push rod, the fixed cover of second cutting ferrule is established on the lower push rod, prevent that the bedplate mounting from breaking away from the lower push rod.

The beneficial effect of adopting the further scheme is as follows: the first cutting ferrule prevents the upper push rod from separating from the lower push rod, the second cutting ferrule prevents the seat plate fixing part from separating from the lower push rod, and the structure is simple.

Further, the seat plate assembly comprises a seat, a first connecting rod and a second connecting rod, one end of the seat is rotatably connected with the seat plate fixing piece, the other end of the seat is rotatably connected with the first connecting rod, one end of the seat is far away from the first connecting rod and is rotatably connected with the connecting piece, the connecting piece is rotatably connected with the end part of the rear wheel carrier, one end of the second connecting rod is rotatably connected with the rear wheel carrier body, and the other end of the second connecting rod is rotatably connected with the seat plate fixing piece.

The beneficial effect of adopting the further scheme is as follows: when the front wheel frame fixing rod is folded, the upper push rod slides, the front wheel frame fixing rod drives the seat plate fixing piece to slide along the lower push rod, the first connecting rod, the second connecting rod, the connecting piece and the seat fixing piece rotate, the seat is folded, and the size of the whole folded frame is reduced.

Drawings

FIG. 1 is a schematic structural view of a foldable stroller frame according to the present invention;

FIG. 2 is a partial cross-sectional view of a foldable stroller frame according to the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is an enlarged view of portion C of FIG. 2;

FIG. 6 is a schematic structural view of a top block and a clamping block of a foldable stroller frame according to the present invention;

FIG. 7 is a schematic structural view of an ejector block and a clamping block when a front wheel frame fixing rod in a foldable stroller frame provided by the utility model is folded;

FIG. 8 is a schematic view of an internal structure of a lower push rod of a foldable stroller frame according to the present invention;

FIG. 9 is a schematic structural view of a handle, an upper push rod, a lower push rod and a connecting member of a frame of the foldable stroller provided in the present invention;

FIG. 10 is an enlarged view of section D of FIG. 9;

FIG. 11 is another angular, partial cross-sectional view of a frame of a foldable stroller in accordance with the present invention;

FIG. 12 is an enlarged view of section E of FIG. 11;

fig. 13 is a schematic structural view of a seat plate fixing member, a front wheel frame fixing rod and a front wheel frame in a foldable stroller frame according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-a front wheel frame, 2-a rear wheel frame, 31-an upper push rod, 311-a top block, 312-a through hole, 313-a second sliding groove, 32-a lower push rod, 321-a through hole, 322-a clamping hole, 33-a front wheel frame fixing rod, 331-a limiting hole, 34-a connecting piece, 341-a first sliding groove, 351-a clamping joint, 3511-a long hole, 3512-a clamping block, 3513-a connecting block, 352-a first spring, 353-a connecting shaft, 4-a wheel, 51-a handrail, 52-a folding switch, 521-a key, 522-a second spring, 53-a steel wire, 541-a clamping bulge, 542-a third spring, 6-a seat plate fixing piece, 7-a first clamping sleeve, 8-a second clamping sleeve, 9-a vehicle seat and 10-a first connecting rod, 11-second link.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

The utility model aims to provide a foldable stroller frame, which solves the problems in the prior art and is small in size and convenient to store.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.

The utility model provides a foldable stroller frame, in one embodiment of the utility model, as shown in fig. 1 to 13, comprising: the front wheel frame 1, the rear wheel frame 2, the folding frame, the wheels 4 and the seat plate component, the wheels 4 are correspondingly arranged on the front wheel frame 1 and the rear wheel frame 2,

the folding frame comprises an upper push rod 31, a connecting piece 34, a front wheel frame fixing rod 33 and a lower push rod 32, one end of the upper push rod 31 is slidably installed in the lower push rod 32, and the top of one end, positioned inside the lower push rod 32, of the upper push rod 31 is fixedly provided with a top block 311; the connecting piece 34 is sleeved and fixed at one end of the lower push rod 32 far away from the upper push rod 31, and a first clamping component is arranged on the connecting piece; one end of the front wheel frame fixing rod 33 passes through the connecting piece 34 and is connected with the connecting piece in a sliding way, and the other end is fixedly connected with the front wheel frame 1; a through hole 321 is formed in the position, corresponding to the first clamping component, of the lower push rod 32, a limiting hole 331 is formed in the front wheel frame fixing rod 33, the first clamping component can sequentially penetrate through the limiting hole 331 and the through hole 321, the top block 311 can push the first clamping component out of the through hole 321, the periphery of the top of the first clamping component is an inclined plane, when the upper push rod 31 contracts, the lower push rod 32 and one end of the front wheel frame fixing rod 33 can slide relatively, the lower push rod 32 and the front wheel frame fixing rod 33 are unlocked, and the rear wheel frame 2 is rotatably connected to the lower push rod 32; the seat plate assembly is mounted at both ends thereof on the connecting member 34 and the lower push rod 32, respectively.

The utility model provides a foldable stroller frame.A push-up rod 31 is slidably arranged in a push-down rod 32, and the push-up rod 31 and the push-down rod 32 can be folded; the connecting piece 34 is fixed on the lower push rod 32, the front wheel frame fixing rod 33 is connected on the connecting piece 34 in a sliding way, and the front wheel frame fixing rod 33 and the lower push rod 32 can be folded; the rear wheel frame 2 is rotationally connected to the lower push rod 32, so that the folding is convenient; when the folding bicycle is folded, the upper push rod 31 slides in the lower push rod 32, the top block 311 ejects the first clamping component out of the lower push rod 32 through the hole 321, the periphery of the top of the first clamping component is an inclined plane, the front wheel frame fixing rod 33 is moved, the edge of the limiting hole 331 is in contact with the inclined plane of the first clamping component, the first clamping component is ejected out of the limiting hole 331, one end of the front wheel frame fixing rod 33 slides relative to the lower push rod 32, the lower push rod 32 and the front wheel frame fixing rod 33 are unlocked, the bicycle frame is folded, and the three support rods of the upper push rod 31, the lower push rod 32 and the front wheel frame fixing rod 33 are folded to form a support rod length.

In an embodiment of the utility model, the first latch assembly includes a latch connector 351, a first spring 352 and a connecting shaft 353, a first sliding slot 341 is formed in the connecting member 34 corresponding to the through hole 321, the latch connector 351 is slidably mounted in the first sliding slot 341, a long hole 3511 is formed in the latch connector 351 along the sliding direction of the first sliding slot 341, the connecting shaft 353 passes through the long hole 3511, and both ends of the connecting shaft are fixed to both sides of the first sliding slot 341, one end of the first spring 352 is fixed to the bottom of the latch connector 351, and the other end of the first spring 352 is fixed to the bottom of the first sliding slot 341, so that the latch connector 351 always has a tendency of passing through the through hole 321, and the periphery of the top of the latch connector 351 is an inclined surface.

The clamping connector 351 is slidably mounted in the first sliding groove 341, the connecting shaft 353 penetrates through the long hole 3511, and two ends of the connecting shaft 353 are fixed to two sides of the first sliding groove 341, so that the sliding direction of the clamping connector 351 can be limited, and the clamping connector 351 can be ensured to penetrate through the through hole 321; the first spring 352 can enable the clamping joint 351 to always have the tendency of passing through the through hole 321, so that when the frame is unfolded, the clamping joint 351 is inserted into the through hole 321 and the limiting hole 331, and the lower push rod 32 and the front wheel frame fixing rod 33 are locked; the top of the clamping connector 351 is provided with an inclined surface all around, when the inclined surface is in contact with the inner wall of the via hole 321, the clamping connector 351 can be completely ejected out of the via hole 321 by moving the lower push rod 32, the structure is simple, and the folding is convenient.

In an embodiment of the utility model, the clamping connector 351 includes a clamping block 3512 and a connecting block 3513, the periphery of the top of the clamping block 3512 is an inclined surface, the top of the connecting block 3513 is fixedly connected with the bottom of the clamping block 3512, the connecting block 3513 is provided with a long hole 3511 along the sliding direction of the first sliding groove 341, two first springs 352 are provided, one end of each of the two first springs 352 is fixedly connected with the bottom of the clamping block 3512, and the other end of each of the two first springs 352 is fixedly connected with the bottom of the first sliding groove 341 and symmetrically arranged at two sides of the connecting block 3513.

The two first springs 352 are symmetrically arranged on two sides of the connecting block 3513, so that the clamping block 3512 is stressed in a balanced manner, and the sliding is more stable; the long hole 3511 is arranged on the connecting block 3513, so that the device is simpler and more convenient.

In a specific embodiment of the present invention, the middle of the front wheel frame fixing rod 33 is a flat plate surface, the flat plate surface is provided with a limiting hole 331, and the flat plate surface is attached to the outer surface of the lower push rod 32.

The plane plate can be tightly attached to the outer surface of the lower push rod 32, so that the clamping block 3512 can penetrate into and eject out of the limiting hole 331 more easily; the clamping block 3512 penetrates through the limiting hole 331 and the through hole 321, locks the front wheel frame fixing rod 33 and the lower push rod 32, and unfolds the frame.

In a specific embodiment of the present invention, the present invention further includes a handle assembly, the handle assembly includes a handrail 51, a folding switch 52, a steel wire 53 and a second clamping assembly, the handrail 51 is fixed at an end portion of the upper push rod 31, the folding switch 52 is rotatably disposed on the handrail 51, a through hole 312 is disposed on the upper push rod 31, a second sliding slot 313 is disposed in the upper push rod 31 corresponding to the through hole 312, the second clamping assembly is slidably disposed in the second sliding slot 313, a through hole for the steel wire 53 to pass through is disposed at a bottom of the second sliding slot 313, a plurality of clamping holes 322 are disposed on the lower push rod 32 along a sliding direction of the upper push rod 31, the through hole 312 can correspond to each clamping hole 322, one end of the steel wire 53 is fixedly connected to the folding switch 52, the other end is fixedly connected to the second clamping assembly, and the second clamping assembly can pass through the through hole 312 and be inserted into the clamping hole 322.

The second clamping assembly slides in the second sliding chute 313, passes through the through hole 312 and any one of the clamping holes 322, locks the upper push rod 31 and the lower push rod 32, and unfolds the frame; the folding switch 52 is pressed, the steel wire 53 is pulled, the steel wire 53 pulls the second clamping component to be pulled out of the through hole 312 and the clamping hole 322, the upper push rod 31 and the lower push rod 32 are unlocked, the upper push rod 31 is slid, and the frame is folded.

In an embodiment of the present invention, the folding switch 52 includes a button 521 and a second spring 522, the button 521 is rotatably disposed on the armrest 51, one end of the steel wire 53 is fixed on the button 521, one end of the second spring 522 is fixed on the armrest 51, and the other end is fixed on the button 521 for resetting the button 521.

The second spring 522 drives the key 521 to reset, and the structure is simple and the operation is convenient.

In a specific embodiment of the present invention, the second clamping assembly includes a clamping protrusion 541 and a third spring 542, the clamping protrusion 541 is slidably disposed in the second sliding groove 313, one end of the third spring 542 is fixed at the bottom of the second sliding groove 313, the other end of the third spring 542 is fixed at the bottom of the clamping protrusion 541, the steel wire 53 passes through the third spring 542 and is fixed at the bottom of the clamping protrusion 541, and the third spring 542 is always in a compressed state.

The clamping protrusion 541 is slidably disposed in the second sliding chute 313, and under the action of the third spring 542, the clamping protrusion 541 penetrates through the through hole 312 and the clamping hole 322 to lock the lower push rod 32 and the upper push rod 31; pressing the key 521, pulling the steel wire 53, pulling the clamping protrusion 541 out of the through hole 312 and the clamping hole 322 by the steel wire 53, unlocking the lower push rod 32 and the upper push rod 31, sliding the upper push rod 31, and folding the frame; third spring 542 is in compression state all the time, slides push up rod 31, and when perforation 312 and joint hole 322 correspond, the automatic perforation 312 and joint hole 322 of wearing out of joint protrusion 541, simple structure, convenient operation.

In an embodiment of the present invention, the seat plate fixing member 6 is further included, the seat plate fixing member 6 is sleeved and slidably disposed on the lower push rod 32, and one end of the front wheel frame fixing rod 33 away from the front wheel frame 1 passes through the connecting member 34 and is fixed on the seat plate fixing member 6.

The seat plate fixing member 6 is used for fixing one end of the front wheel frame fixing rod 33 far away from the front wheel frame 1, so that the front wheel frame fixing rod 33 slides more smoothly on the connecting member 34 and is not easy to be blocked.

In an embodiment of the present invention, the seat plate fixing device further includes a first cutting sleeve 7 and a second cutting sleeve 8, the first cutting sleeve 7 is fixedly sleeved on the upper push rod 31 to prevent the upper push rod 31 from separating from the lower push rod 32, and the second cutting sleeve 8 is fixedly sleeved on the lower push rod 32 to prevent the seat plate fixing member 6 from separating from the lower push rod 32.

The first cutting sleeve 7 prevents the upper push rod 31 from separating from the lower push rod 32, and the second cutting sleeve 8 prevents the seat board fixing piece 6 from separating from the lower push rod 32, so the structure is simple.

In an embodiment of the present invention, the seat plate assembly includes a seat 9, a first connecting rod 10 and a second connecting rod 11, one end of the seat 9 is rotatably connected to the seat plate fixing member 6, the other end is rotatably connected to the first connecting rod 10, one end of the first connecting rod 10 away from the seat 9 is rotatably connected to a connecting member 34, the connecting member 34 is rotatably connected to an end of the rear wheel frame 2, one end of the second connecting rod 11 is rotatably connected to a frame body of the rear wheel frame 2, and the other end is rotatably connected to the seat plate fixing member 6.

When the front wheel frame fixing rod 33 is folded, the upper push rod 31 slides, the front wheel frame fixing rod 33 drives the seat plate fixing piece 6 to slide along the lower push rod 32, the first connecting rod 10, the second connecting rod 11, the connecting piece 34 and the seat 9 fixing piece rotate, the seat 9 is folded, and the volume of the whole folded frame is reduced.

The embodiment of the utility model provides a foldable stroller frame, which comprises the following use processes:

when the frame is unfolded, the handrail 51 is stretched, the upper push rod 31 is driven to move, when the through hole 312 in the upper push rod 31 corresponds to the clamping hole 322 in the lower push rod 32, the clamping protrusion 541 penetrates through the through hole 312 and the clamping hole 322 under the action of the third spring 542, the upper push rod 31 and the lower push rod 32 are locked, and when the frame is required to be extended, the key 521 is pressed down, the steel wire 53 is pulled, the clamping protrusion 541 is pulled by the steel wire 53, the clamping protrusion 541 is made to exit from the through hole 312 and the clamping hole 322, and the upper push rod 31 and the lower push rod 32 are unlocked; the front wheel frame fixing rod 33 is pulled, so that the through hole 321 on the lower push rod 32 corresponds to the limiting hole 331 on the fixing frame of the front wheel frame fixing rod 33, the clamping block 3512 penetrates through the clamping hole 322 and the through hole 321 to lock the lower push rod 32 and the front wheel frame fixing rod 33, and the saddle 9 automatically unfolds along with unfolding of the folding frame;

the frame is folded, the key 521 is pressed, the steel wire 53 is pulled, the clamping protrusion 541 is pulled out of the through hole 312 and the clamping hole 322, the upper push rod 31 and the lower push rod 32 are unlocked, and the upper push rod 31 is pushed to be folded; the inclined surface of the top block 311 at the top of the upper push rod 31 contacts with the inclined surface of the clamping block 3512, the clamping block 3512 is pushed out of the through hole 321, the edge of the hole wall of the limiting hole 331 contacts with the inclined surface of the clamping block 3512, the lower push rod 32 slides relative to one end of the front wheel frame fixing rod 33, the lower push rod 32 is unlocked, and the folding of the bicycle frame is completed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A foldable stroller frame, comprising: the seat comprises a front wheel frame (1), a rear wheel frame (2), a folding frame, wheels (4) and a seat plate component, wherein the wheels (4) are correspondingly arranged on the front wheel frame (1) and the rear wheel frame (2),

the folding frame comprises an upper push rod (31), a connecting piece (34), a front wheel frame fixing rod (33) and a lower push rod (32), one end of the upper push rod (31) is slidably mounted in the lower push rod (32), and the top of one end, located inside the lower push rod (32), of the upper push rod (31) is fixedly provided with a top block (311); the connecting piece (34) is sleeved and fixed at one end, far away from the upper push rod (31), of the lower push rod (32), and a first clamping assembly is mounted on the connecting piece; one end of the front wheel frame fixing rod (33) penetrates through the connecting piece (34) and is in sliding connection with the connecting piece, and the other end of the front wheel frame fixing rod is fixedly connected with the front wheel frame (1); a through hole (321) is formed in the position, corresponding to the first clamping component, of the lower push rod (32), a limiting hole (331) is formed in the front wheel carrier fixing rod (33), the first clamping component can sequentially penetrate through the limiting hole (331) and the through hole (321), the first clamping component can be ejected out of the through hole (321) by the ejector block (311), the periphery of the top of the first clamping component is an inclined plane, when the upper push rod (31) contracts, the lower push rod (32) and one end of the front wheel carrier fixing rod (33) can slide relatively, the lower push rod (32) and the front wheel carrier fixing rod (33) are unlocked, and the rear wheel carrier (2) is rotatably connected to the lower push rod (32); two ends of the seat plate component are respectively arranged on the connecting piece (34) and the lower push rod (32).

2. A foldable stroller frame according to claim 1, characterized in that said first snap-in assembly comprises a snap-in connector (351), a first spring (352) and a connecting shaft (353), a first chute (341) is arranged in the connecting piece (34) corresponding to the via hole (321), the clamping joint (351) is slidably arranged in the first sliding chute (341), a long hole (3511) is formed in the clamping joint (351) along the sliding direction of the first sliding chute (341), the connecting shaft (353) penetrates through the long hole (3511) and two ends of the connecting shaft are fixed at two sides of the first sliding groove (341), one end of the first spring (352) is fixed at the bottom of the clamping connector (351), the other end of the first spring is fixed at the bottom of the first sliding groove (341), so that the clamping connector (351) always has a tendency of passing through the through hole (321), and the periphery of the top of the clamping connector (351) is an inclined plane.

3. The foldable stroller frame according to claim 2, wherein the clamping connector (351) comprises a clamping block (3512) and two connecting blocks (3513), the periphery of the top of the clamping block (3512) is provided with an inclined surface, the top of each connecting block (3513) is fixedly connected with the bottom of the clamping block (3512), the connecting block (3513) is provided with the slot (3511) along the sliding direction of the first sliding chute (341), two first springs (352) are provided, one ends of the two first springs (352) are fixedly connected with the bottom of the clamping block (3512), the other ends of the two first springs are fixedly connected with the bottom of the first sliding chute (341), and the two first springs are symmetrically arranged on two sides of the connecting block (3513).

4. The foldable stroller frame of claim 1, wherein the middle part of the front wheel frame fixing rod (33) is a flat plate surface, the flat plate surface is provided with the limiting hole (331), and the flat plate surface is attached to the outer surface of the lower push rod (32).

5. The foldable stroller frame according to claim 1, further comprising a handle assembly, wherein the handle assembly comprises a handrail (51), a folding switch (52), a steel wire (53) and a second clamping assembly, the handrail (51) is fixed at the end of the upper push rod (31), the folding switch (52) is rotatably arranged on the handrail (51), a through hole (312) is formed in the upper push rod (31), a second sliding groove (313) is formed in the upper push rod (31) corresponding to the through hole (312), the second clamping assembly is slidably arranged in the second sliding groove (313), a through hole for the steel wire (53) to pass through is formed at the bottom of the second sliding groove (313), a plurality of clamping holes (322) are formed in the lower push rod (32) along the sliding direction of the upper push rod (31), and the through hole (312) can correspond to each clamping hole (322), copper wire (53) one end with folding switch (52) fixed connection, the other end with second joint subassembly fixed connection, second joint subassembly can be worn out perforation (312) insert in joint hole (322).

6. The foldable stroller frame according to claim 5, wherein the folding switch (52) comprises a button (521) and a second spring (522), the button (521) is rotatably disposed on the armrest (51), one end of the steel wire (53) is fixed on the button (521), one end of the second spring (522) is fixed on the armrest (51) and the other end is fixed on the button (521) for resetting the button (521).

7. The foldable stroller frame according to claim 5, wherein the second clamping assembly comprises a clamping protrusion (541) and a third spring (542), the clamping protrusion (541) is slidably disposed in the second sliding groove (313), one end of the third spring (542) is fixed to the bottom of the second sliding groove (313), the other end of the third spring is fixed to the bottom of the clamping protrusion (541), the steel wire (53) penetrates through the third spring (542) and is fixed to the bottom of the clamping protrusion (541), and the third spring (542) is always in a compressed state.

8. The foldable stroller frame according to claim 1, further comprising a seat plate fixing member (6), wherein the seat plate fixing member (6) is sleeved and slidably disposed on the lower push rod (32), and one end of the front wheel frame fixing rod (33) far away from the front wheel frame (1) passes through the connecting member (34) and is fixed on the seat plate fixing member (6).

9. The foldable stroller frame according to claim 8, further comprising a first sleeve (7) and a second sleeve (8), wherein the first sleeve (7) is fixedly sleeved on the upper push rod (31) to prevent the upper push rod (31) from separating from the lower push rod (32), and the second sleeve (8) is fixedly sleeved on the lower push rod (32) to prevent the seat plate fixing member (6) from separating from the lower push rod (32).

10. The foldable stroller frame according to claim 1, wherein the seat plate assembly comprises a seat (9), a first connecting rod (10) and a second connecting rod (11), one end of the seat (9) is rotatably connected with a seat plate fixing member (6), the other end of the seat (9) is rotatably connected with the first connecting rod (10), one end of the first connecting rod (10) far away from the seat (9) is rotatably connected with the connecting member (34), the connecting member (34) is rotatably connected with the end of the rear wheel frame (2), one end of the second connecting rod (11) is rotatably connected with the frame body of the rear wheel frame (2), and the other end of the second connecting rod is rotatably connected with the seat plate fixing member (6).

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