Stroller frame

Abstract

Disclosed in the present invention is a stroller frame, comprising: a front leg frame and a rear leg frame, wherein an upper end of the rear leg frame is hinged to an upper end of the front leg frame; a seat frame, wherein a front portion of the seat frame is hinged to the front leg frame; a handle assembly, wherein a lower end of the handle assembly is hinged to the upper end of the rear leg frame; a control system configured for unlocking and folding or unfolding and locking the frame, and comprising a locking assembly and an unlocking assembly disposed on the handle assembly; a slider disposed on the rear leg frame, the slider being capable of being locked for fixation or unlocked to slide; and a linkage rod hinged to the handle assembly and the slider, wherein a rear portion of the seat frame is hinged to the linkage rod, and after being unlocked, the slider can slide to drive the front leg frame, the seat frame, and the handle assembly to move and fold toward the rear leg frame. The present invention enables folding of the front leg frame, the rear leg frame, the seat frame, an armrest, and a handlebar by means of a single linkage system, making the folding operation convenient.

Description

Stroller frame TECHNICAL FIELD

[0001] The present application relates to a stroller frame, and relates to the technical field of strollers. BACKGROUND

[0002] Strollers are essential products for most infants and young children to go out. With the increasing demand for strollers, strollers are becoming more and more sophisticated in terms of stability, safety, lightness, small size, and easy and fast folding.

[0003] The existing folding strollers are various, and have developed from two-handed folding to one-key linkage folding with single-handed operation. The currently popular three-fold stroller structure is still relatively complex, and the body is a system, the seat is a system, and the two groups of linkage systems realize the folding of the three-fold stroller. After folding, the volume is not neat and small, which is not conducive to storage. SUMMARY

[0004] The purpose of the present application is to provide a stroller frame with simple structure, small and neat volume after folding, which can realize single-handed operation of the stroller, and quickly fold the front and rear legs and the handlebar at the same time with one action. The handlebar does not occupy the folding space after being folded.

[0005] The present application is realized by the following technical solutions:

[0006] The stroller frame comprises:

[0007] The front leg frame is provided with a front wheel at the lower end;

[0008] The rear leg frame is provided with a rear wheel at the lower end, and the upper end of the rear leg frame is hingedly connected to the upper end of the front leg frame;

[0009] The seat frame is hingedly connected to the front leg frame at the front part;

[0010] The handlebar assembly is hingedly connected to the upper end of the rear leg frame at the lower end;

[0011] The control system is used to unlock and fold or unfold and lock the stroller frame, and comprises a locking assembly and an unlocking assembly arranged on the handlebar assembly;

[0012] The sliding block is arranged on the rear leg frame, and the sliding block can be locked and fixed or unlocked and slid;

[0013] The linkage rod is hingedly connected to the handlebar assembly and the sliding block, and the rear part of the seat frame is hingedly connected to the linkage rod;

[0014] The sliding block can slide and drive the front leg frame, the seat frame and the handlebar assembly to move close to the rear leg frame after being unlocked.

[0015] The stroller frame as claimed in claim 1, wherein the rear leg frame comprises a cross beam connecting the rear wheels and rear leg tubes respectively arranged at both ends of the cross beam, the upper end of each rear leg tube is provided with two connecting ports, and the front leg frame and the handle assembly are respectively hinged to the two connecting ports, and each rear leg tube is provided with the sliding block.

[0016] The stroller frame as claimed in claim 1, wherein the locking assembly comprises a locking seat arranged on the rear leg tube, the locking seat is provided with a sliding block capable of moving along the axial direction of the locking seat and a lock catch capable of swinging, the sliding block is provided with a recess cavity matched with the lock catch, the sliding block is connected with a pull rope of the unlocking assembly, and the sliding block is capable of driving the lock catch to swing when the sliding block moves, so as to lock or release the sliding block.

[0017] The stroller frame as claimed in claim 1, wherein the rear leg tube is internally provided with an elastic member capable of accelerating the movement of the sliding block to the rear wheel direction when the sliding block is unlocked.

[0018] The stroller frame as claimed in claim 1, wherein the rear leg tube is internally provided with an axial sliding groove, and the sliding block slides along the sliding groove.

[0019] The stroller frame as claimed in claim 1, wherein the front leg frame comprises a stepping beam and front legs arranged at both ends of the stepping beam, the handle assembly comprises a handle and a handle rod, and the front legs are parallel to or on a straight line with the handle rod when the front leg frame and the handle assembly are unfolded.

[0020] The stroller frame as claimed in claim 1, wherein the rear leg tube is perpendicular to the front legs and the handle rod when the stroller frame is unfolded.

[0021] The stroller frame as claimed in claim 1, further comprising a handrail which is detachably arranged on the sliding block.

[0022] The stroller frame as claimed in claim 1, wherein the rear leg tube comprises two parallel tubes, the upper end of each tube is provided with a connecting joint for fixing the two parallel tubes, the upper end of the connecting joint is provided with two hinged joints for respectively hinging the front leg frame and the rear leg frame, and the locking structure of the sliding block is arranged in the lower end cavity of the connecting joint.

[0023] The stroller frame as claimed in claim 1, wherein the unlocking assembly comprises a rotary unlocking switch arranged on the handle of the handle assembly and a pull rope driven and pulled by the rotary unlocking switch.

[0024] Another stroller frame, wherein the rear leg frame comprises a cross beam connecting the rear wheels and rear leg tubes respectively arranged at both ends of the cross beam, and each rear leg tube is provided with a sliding block capable of sliding along the axial direction of the rear leg tube. A locking assembly is arranged between the rear leg tube and the sliding block.

[0025] Further, the locking assembly comprises a locking seat arranged on the rear leg pipe, the locking seat is provided with a slide block capable of moving along the axial direction and a lock catch capable of swinging, the slide block is provided with a lock piece matched with the lock catch, the slide block is connected with the pull rope of the unlocking assembly, and the slide block is capable of driving the lock catch to swing when moving so as to lock or release the slide block.

[0026] Further, the slide block is provided with a handrail connecting seat for facilitating the connection of the handrail.

[0027] Compared with the prior art, the present application has the following advantages:

[0028] The front leg frame, the rear leg frame and the seat frame of the present application are simultaneously folded by the sliding of the slide block after being unlocked and the driving of the connecting rod, the linkage folding system of the vehicle frame is reduced, the parts are reduced, the weight of the whole vehicle frame is reduced, the vehicle frame is simple and light, and the space occupied after being folded is smaller.

[0029] The elastic piece in the rear leg pipe is matched with the control system to realize the one-key automatic folding of the whole vehicle frame, the handrail is automatically folded on the side of the rear leg pipe shaft along with the slide block, and one linkage system realizes the folding of the front leg frame, the rear leg frame, the seat frame, the handrail and the handle rod. BRIEF DESCRIPTION OF DRAWINGS

[0030] Fig. 1 is a schematic diagram of the structure of the present application;

[0031] Fig. 2 is a schematic diagram of the partial structure of the present application;

[0032] Fig. 3 is a schematic diagram of the exploded structure of the rear leg frame and the handrail of the present application;

[0033] Fig. 4 is an enlarged view of A in Fig. 3;

[0034] Fig. 5 is an enlarged view of B in Fig. 3;

[0035] Fig. 6 is a schematic diagram of the partial structure of the lock catch extending out of the connecting joint;

[0036] Fig. 7 is a schematic diagram of the structure of the present application after being folded;

[0037] Fig. 8 is a schematic diagram of the structure of another embodiment of the present application;

[0038] Fig. 9 is a schematic diagram of the exploded structure of the rear leg frame, the handrail and the connecting joint of another embodiment of the present application;

[0039] Fig. 10 is a schematic diagram of the partial structure of the rear leg frame of another embodiment of the present application. DETAILED DESCRIPTION

[0040] The present application will be further described in detail in combination with the drawings of the specification.

[0041] As shown in Fig. 1-6, a stroller frame, comprising a front frame 1, the lower end of which is provided with a front wheel; a rear frame 2, the lower end of which is provided with a rear wheel, the upper end of the rear frame 2 is hinged to the upper end of the front frame 1; a seat frame 3, the front part of which is hinged to the front frame 1; a handle assembly 4, the lower end of which is hinged to the upper end of the rear frame 2; a control system, which makes the frame be unlocked to fold or be locked to unfold, comprising a locking assembly 5 and an unlocking assembly 6 provided on the handle assembly 4; a sliding block 7, which is provided on the rear frame 2, the sliding block 7 can be locked and fixed or unlocked to slide; a linkage rod 8, which is hinged to the handle assembly 4 and the sliding block 7 respectively, the rear part of the seat frame 3 is hinged to the linkage rod 8; the sliding block 7 can slide towards the rear wheel after being unlocked, and drive the front frame 1, the seat frame 3 and the handle assembly 4 to move towards the rear frame 2. The sliding block 7 can slide towards the rear wheel along the pipe axis after being unlocked, and drive the linkage rod 8 to move towards the sliding block 7 and slide down together, thereby driving the handle assembly 4 and the seat frame 3 to move towards the rear frame 2, and in the folding process of the seat frame 3, the front frame 1 rotates towards the rear frame 2 with the upper end hinge point as the center. The whole folding movement is simple and the structure is simple.

[0042] The unlocking assembly 6 comprises a one-handed operation unlocking switch and a pull rope 60 connected to the locking assembly 5, the unlocking switch is generally provided on the handle 41 of the handle assembly 4 for easy operation, and one embodiment of the unlocking switch is a rotary unlocking switch 61 as shown in Fig. 1-2, the pull rope 60 is driven to move up and down by the rotary unlocking switch 61. The handle rod 42 of the handle assembly 4 can be a single rod, or a retractable or foldable handle rod, and the unlocking assembly 6 can achieve the unlocking of the sliding block 7 and the handle rod 42. Of course, a reset spring is preferably provided on the unlocked locking member to reset the unlocked locking member.

[0043] Further, the rear frame 2 comprises a cross beam 21 connected to the rear wheels and rear leg pipes 22 provided at both ends of the cross beam 21, the upper end of the rear leg pipe 22 is provided with two connection ports 23, which are hinged to the front frame 1 and the handle assembly 4 respectively, and each rear leg pipe 22 is provided with a sliding block 7, which drives the connected member on the same side to move and fold during the sliding process, and the symmetric work makes the folding of the whole stroller frame more smooth.

[0044] The locking assembly 5 comprises a lock seat 51 arranged on the rear tube 22, the lock seat 51 is provided with a slide block 52 which can move along the axial direction and a lock catch 53 which can swing, the slide block 7 is provided with a recess 71 which cooperates with the lock catch 53, the slide block 52 is connected with the pull rope 60 of the unlocking assembly 6, and when the slide block 52 moves, the lock catch 53 can be driven to swing so as to lock or release the slide block 7. As shown in FIG. 4 and FIG. 5, one end of the lock catch 53 is hinged to the lock seat 51, the lock catch 53 is provided with an inclined slot 531 which extends from the bottom of one axial side to the end of the other axial side, the slide block 52 is provided with a pull rod 521 which passes through the inclined slot 531, when the slide block 52 moves upward, the pull rod 521 moves upward from the bottom of the inclined slot 531, the lock catch 53 swings to be separated from the recess 71 of the slide block 7, so as to unlock the slide block 7, and the slide block 7 can move downward.

[0045] Preferably, in order to better realize the automatic folding of the frame, the rear tube 22 is provided with an elastic member 70 which can accelerate the movement of the slide block 7 to the rear wheel direction after the slide block 7 is unlocked. The elastic member 70 is arranged in the rear tube 22 on both sides, and the elastic member 70 is preferably a pull spring, one end of which is connected to the bottom of the rear frame 2, and the other end of which is connected to the slide block 7, so that after the slide block 7 is unlocked, the slide block 7 can quickly slide downward under the action of the pull spring to drive the linkage rod 8, the seat frame 3, the front frame 1 and the handle assembly 4 to fold.

[0046] The rear tube 22 can be one, which is provided with a cavity, an elastic member 70 is arranged on one axial side, and the locking assembly 5 of the slide block 7 is arranged on the other axial side, and an axial slide way 221 is arranged in the middle for the slide block 7 to slide. Preferably, as shown in the embodiments of the present application, as shown in FIG. 1-4 and FIG. 7, the rear tube 22 on each side is two parallel tubes which are connected to the end of the cross beam 21 in parallel, the slide way 221 of the slide block 7 is formed between the two rear tubes 22, a pull spring is arranged in one of the rear tubes 22, the free end of the pull spring is connected to the slide block 7, and the rear tube 22 is provided with a slot so that the pull spring can drive the slide block 7 to move, and the locking assembly 5 is arranged in the other rear tube 22, and the lock catch 53 can extend out of the rear tube 22 and extend into the recess 71 of the slide block 7.

[0047] In a preferred embodiment of the present application, when the rear tube 22 is two parallel tubes, the upper end is provided with a connecting joint 20 which fixes the two parallel tubes, the upper end of the connecting joint 20 is provided with two hinge joints which are respectively hinged to the front frame 1 and the rear frame 2, and the locking structure of the slide block 7 is arranged in the lower end cavity of the connecting joint 20. The connecting joint 20 can moderate the connection angle between the front tube of the front frame 1 and the handle assembly 4, and can make the frame parts easier to be mass-produced and assembled, and at the same time, it is convenient to maintain the slide block 7 and the locking assembly 5. Preferably, the connecting joint 20 is sleeved with the lower end of one side of the two open ends 23 of the rear tube 22, and the other side is long and the other side is short, the long side can be used to install the locking assembly 5, and the other side is convenient to install the elastic member 70 and connect the slide block 7.

[0048] The front frame 1 comprises a pedal beam 11 and front legs 12 at both ends of the pedal beam 11, and the handle assembly 4 comprises a handle 41 and a handle rod 42, and the upper ends of the rear tubes 22 are respectively hingedly connected to the lower ends of the handle rod 42 and the upper ends of the front legs 12. Preferably, when the front frame 1 and the handle assembly 4 are unfolded, the front legs 12 are parallel to or on a straight line with the handle rod 42. More preferably, when the frame is unfolded, the rear tubes 22 are at right angles with the front legs 12 and the handle rod 42, and the right angles are rounded for better appearance and comfort, and the rounding is smooth and not easy to hurt the user. When folded, the entire frame is more neat and occupies less space, as shown in FIG. 7.

[0049] Further, the stroller frame of the present application further comprises a handrail 9 which is detachably arranged on the sliding block 7, and when the sliding block 7 is unlocked and moved downward, the handrail 9 can be folded inside or outside the axial direction of the rear tube 22 without rotating or detaching, and does not occupy the space after folding.

[0050] Preferably, the sliding block 7 is provided with a handrail mounting seat 72 and a lock key 73 for fixing the handrail 9, so that the handrail 9 can be freely detached. The handrail 9 can be pulled out by pressing the lock key 73, and the handrail 9 can be locked by loosening the lock key 73 after being installed.

[0051] In another embodiment of the present application, the number of separate parts is reduced, and the combined installation of the rear frame 2 and the sliding block 7 is facilitated, as shown in FIGS. 8-10. The rear frame 2 comprises a cross beam 21 connected to the rear wheels and rear tubes respectively arranged at both ends of the cross beam 21, and each rear tube 22 is provided with a sliding block 7 sliding along the axial direction thereof. The sliding channel 221 of the sliding block 7 is arranged on the inner wall of the rear tube 22, and the sliding block 7 is provided with a handrail connecting seat 90.

[0052] Further, the locking assembly 5 comprises a lock seat 51 arranged on the rear tube 22, the lock seat 51 is provided with a pull block 52 movable along the axial direction thereof and a lock catch 53 swingable, the sliding block 7 is provided with a lock piece 74 matched with the lock catch 53, the pull block 52 is connected to the pull rope 60 of the unlocking assembly 6, and the pull block 52 is movable to drive the lock catch 53 to swing to lock or release the sliding block 7. As shown in FIG. 10, when the lock catch 53 is unlocked, it is located above the lock piece 74, and the sliding block 7 can be folded along the sliding channel 221; when the whole frame is opened and locked, the sliding block 7 is moved to the position where the lock piece 74 is above the lock catch 53, the lock catch 53 is extended to abut against the lock piece 74, thereby fixing the sliding block 7 on the rear tube 22 and keeping the whole frame in the opened state.

[0053] For the stroller frame, each unlocked part is preferably matched with a reset piece, so that the parts such as the pull block 52, the lock key 73, and the lock catch 53 can be reset to the state before unlocking when the frame is unfolded, thereby facilitating automatic folding of the stroller next time.

[0054] When the present application needs to be folded, the rotary unlocking switch 61 is rotated to drive the pull rope 60 to move the locking assembly 5, so that the sliding block 7 is separated from the locking of the locking buckle 53, and the sliding block 7 moves to the lower end of the rear leg tube 22 under the action of the tension spring of the elastic member 70, and the linkage rod 8 hinged to the sliding block 7 moves downward and rotates, thereby driving the seat frame 3 and the handle assembly 4 to be folded to the rear frame 2, and the front frame 1 is also folded to the rear frame 2. Of course, when the sliding block 7 is not assisted by the elastic member 70, the stroller can also be folded by one key, but external force is needed.

Claims

1. A stroller frame, characterized by The utility model relates to a folding bicycle, comprising: a front frame (1) having a front wheel at a lower end thereof; a rear frame (2) having a rear wheel at a lower end thereof, an upper end of the rear frame (2) being hingedly connected to an upper end of the front frame (1); a seat frame (3) having a front portion hingedly connected to the front frame (1); a handlebar assembly (4) having a lower end hingedly connected to an upper end of the rear frame (2); a control system for unlocking and folding or locking and unfolding the frame, comprising a locking assembly (5) and an unlocking assembly (6) provided on the handlebar assembly (4); a sliding block (7) provided on the rear frame (2), the sliding block (7) being capable of being locked and fixed or unlocked and sliding; a linkage rod (8) hingedly connected to the handlebar assembly (4) and the sliding block (7), a rear portion of the seat frame (3) being hingedly connected to the linkage rod (8); the sliding block (7) being capable of sliding and driving the front frame (1), the seat frame (3) and the handlebar assembly (4) to move towards the rear frame (2) after being unlocked.

2. The stroller frame of claim 1, wherein the rear frame (2) comprising a cross beam (21) connected to the rear wheel and rear tubes (22) provided at two ends of the cross beam (21) respectively, upper ends of the rear tubes (22) being provided with two connecting ports (23) hingedly connected to the front frame (1) and the handlebar assembly (4) respectively, each of the rear tubes (22) being provided with the sliding block (7).

3. The stroller frame of claim 2, wherein the locking assembly (5) comprising a lock seat (51) provided on the rear tube (22), the lock seat (51) being provided with a pull block (52) capable of moving along an axial direction of the lock seat (51) and a lock catch (53) capable of swinging, the sliding block (7) being provided with a cavity (71) matched with the lock catch (53), the pull block (52) being connected to a pull rope (60) of the unlocking assembly (6), the pull block (52) being capable of driving the lock catch (53) to swing when moving so as to lock or release the sliding block (7).

4. The stroller frame of claim 3, wherein the rear tube (22) being provided with an elastic member (70) inside, the elastic member (70) accelerating movement of the sliding block (7) in a direction of the rear wheel after the sliding block (7) being unlocked.

5. The stroller frame of claim 2 or 4, wherein the rear tube (22) being provided with an axial sliding channel (221) in a middle portion thereof, the sliding block (7) sliding along the sliding channel (221).

6. The stroller frame of claim 2, wherein the front frame (1) comprising a tread beam (11) and front legs (12) at two ends of the tread beam (11), the handlebar assembly (4) comprising a handle (41) and a handlebar rod (42), the front legs (12) being parallel to or on a straight line with the handlebar rod (42) after the front frame (1) and the handlebar assembly (4) being unfolded.

7. The stroller frame of claim 6, wherein the rear tubes (22) being at right angles with the front legs (12) and the handlebar rod (42) after the frame being unfolded.

8. The stroller frame of claim 1, wherein the utility model further comprises an armrest (9) detachably provided on the sliding block (7).

9. The stroller frame of claim 2, wherein the rear tubes (22) being two parallel tubes, upper ends of the two parallel tubes being provided with a connecting joint (20) for fixing the two parallel tubes, the connecting joint (20) being provided with two hinging joints at upper ends thereof, the hinging joints being hingedly connected to the front frame (1) and the rear frame (2) respectively, a locking structure of the sliding block (7) being provided in a lower end cavity of the connecting joint (20).

10. The stroller frame of claim 2, wherein The unlocking assembly (6) comprises a rotation unlocking switch (61) arranged on the handle of the handle assembly (4) and a pull rope (60) driven by the rotation unlocking switch (61).

11. The stroller frame of claim 1, wherein The rear foot frame (2) comprises a cross beam (21) connected with rear wheels and rear foot tubes (22) arranged at two ends of the cross beam (21) respectively, and each rear foot tube (22) is provided with a sliding block (7) sliding along an axial direction thereof.

12. The stroller frame of claim 11, wherein The locking assembly (5) is arranged between the rear foot tube (22) and the sliding block (7).

13. The stroller frame of claim 12, wherein The locking assembly (5) comprises a lock seat (51) arranged on the rear foot tube (22), the lock seat (51) is provided with a pull block (52) movable along an axial direction thereof and a lock catch (53) swingable, the sliding block (7) is provided with a lock piece (74) matched with the lock catch (53), the pull block (52) is connected with the pull rope (60) of the unlocking assembly (6), and the pull block (52) is capable of driving the lock catch (53) to swing when the pull block (52) moves, so as to lock or release the sliding block (7).

14. The stroller frame of claim 11, wherein The sliding block (7) is provided with an armrest connecting seat (90).

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