Stroller frame

Abstract

The invention discloses a stroller frame, which comprises a front frame, a rear frame, the upper end of the rear frame being hinged to the upper end of the front frame; a seat frame, the front part of which being hinged to the front frame; a handle assembly, the lower end of which being hinged to the upper end of the rear frame; a control system, which enables the frame to be unlocked and folded or locked and unfolded, comprising a locking assembly and an unlocking assembly arranged on the handle assembly; a sliding block arranged on the rear frame, which can be locked and fixed or unlocked and slid; a linkage rod, which is hinged to the handle assembly and the sliding block, the rear part of the seat frame being hinged to the linkage rod; the sliding block can slide after being unlocked and drive the front frame, the seat frame and the handle assembly to approach the rear frame for folding.

Description

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-handed operation one-key linkage folding. The currently popular three-fold stroller structure is still relatively complex, 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. The folded size 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 size after folding, which can realize one-handed operation of the stroller, one action to quickly fold the front and rear legs and the handlebar, and the handlebar does not occupy the folding space after being folded.

[0005] The present application is achieved 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 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 respectively hingedly connected with the front leg frame and the handle assembly, 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 movable along the axial direction of the locking seat and a lock catch swingable, 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 is moved 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 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 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 respectively hingedly connected with 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 by the rotary unlocking switch.

[0024] Compared with the prior art, the stroller frame has the following advantages:

[0025] The front frame, the rear frame and the seat frame of the present application are simultaneously folded by the sliding of the sliding block after being unlocked and the driving of the connecting rod, the linkage folding system of the frame is reduced, the parts are reduced, the weight of the whole vehicle frame is reduced, the frame structure is simple and light, and the occupied space is smaller after being folded.

[0026] The elastic member in the rear frame tube is accelerated to slide and move in cooperation with the control system, the whole vehicle frame is automatically folded by one key, the handrails are automatically folded in the rear frame tube shaft side with the sliding of the sliding block, one set of linkage system realizes the folding of the front frame, the rear frame, the seat frame, the handrails and the handle bar, and the folding is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a three-dimensional structure schematic diagram of the present application;

[0028] Figure 2 It is a partial structure exploded schematic diagram of the present application;

[0029] Figure 3 It is an exploded schematic diagram of the rear frame and the handrails of the present application;

[0030] Figure 4 It is an enlarged view of A of Figure 3 ;

[0031] Figure 5 It is an enlarged view of B of Figure 3 ;

[0032] Figure 6 It is a partial structure schematic diagram of the extended lock catch in the connecting joint;

[0033] Figure 7 It is a structure schematic diagram of the present application after being folded. DETAILED DESCRIPTION

[0034] The present application will be further described in detail in combination with the drawings of the specification.

[0035] As Figures 1-6As shown, a stroller frame comprises a front frame 1 with a front wheel at its lower end; a rear frame 2 with a rear wheel at its lower end, the upper end of the rear frame 2 is hinged to the upper end of the front frame 1; a seat frame 3 with its front part hinged to the front frame 1; a handle assembly 4 with its lower end hinged to the upper end of the rear frame 2; a control system for folding or unfolding the frame, which comprises a locking assembly 5 and an unlocking assembly 6 provided on the handle assembly 4; a sliding block 7 provided on the rear frame 2, the sliding block 7 can be locked or unlocked; a linkage 8 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 8; the sliding block 7 can slide after being unlocked and drive the front frame 1, the seat frame 3 and the handle assembly 4 to fold towards the rear frame 2. The sliding block 7 can slide towards the rear wheel after being unlocked, and drive the linkage 8 to fold towards the sliding block 7 and slide down together, thereby driving the handle assembly 4 and the seat frame 3 to fold towards the rear frame 2. In the folding process of the seat frame 3, the front frame 1 rotates and folds towards the rear frame 2 with the upper end hinged point as the center. The whole folding movement is simple and the structure is simple.

[0036] 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. An embodiment of the unlocking switch is shown in Figures 1-2 The pull rope 60 is driven and pulled by the rotating unlocking switch 61. The handle rod 42 of the handle assembly 4 can be a single rod, or a retractable or foldable handle rod. 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.

[0037] Further, the rear frame 2 comprises a cross beam 21 connected to the rear wheels and rear leg tubes 22 provided at both ends of the cross beam 21. The upper end of each rear leg tube 22 is provided with two connection ports 23 hinged to the front frame 1 and the handle assembly 4 respectively. Each rear leg tube 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. The symmetrical work makes the folding of the whole stroller frame more smooth.

[0038] The locking assembly 5 comprises a lock seat 51 provided on the rear leg tube 22, the lock seat 51 is provided with a pull block 52 movable along its axis and a lock catch 53 swingable, the sliding block 7 is provided with a recess 71 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 can drive the lock catch 53 to swing when moving, thereby locking or releasing the sliding block 7. As shown in Figure 4 and 5As shown, the lock catch 53 is hingedly connected to the lock seat 51, and the lock catch 53 is provided with a slanted groove 531 extending from the bottom of one axial side to the end of the other axial side. The pull block 52 is provided with a pull rod 521 passing through the slanted groove 531. When the pull block 52 is moved upward, the pull rod 521 is moved upward from the bottom of the slanted groove 531, the lock catch 53 swings to disengage from the recess 71 of the sliding block 7, thereby unlocking the sliding block 7, and the sliding block 7 can be moved downward.

[0039] Preferably, in order to better realize the automatic folding of the frame, the rear leg tube 22 is provided with an elastic member 70 for accelerating the movement of the sliding block 7 in the direction of the rear wheel after the sliding block 7 is unlocked. The elastic member 70 is preferably a tension spring, one end of which is connected to the bottom of the rear leg frame 2, and the other end of which is connected to the sliding block 7. After the sliding block 7 is unlocked, the sliding block 7 can be quickly moved downward under the action of the tension spring to drive the linkage rod 8, the seat frame 3, the front leg frame 1 and the handle assembly 4 to be folded.

[0040] The rear leg tube 22 can be one, which is provided with a cavity, an elastic member 70 is placed on one axial side, a locking assembly 5 of the sliding block 7 is arranged on the other side, and an axial sliding groove 221 is arranged in the middle for the sliding block 7 to slide along. Preferably, as shown in the embodiment of the present application, as shown in FIGS. 6 and 7, each rear leg tube 22 is two parallel tubes, which are connected to the ends of the cross beam 21 in parallel, the sliding groove 221 of the sliding block 7 is formed between the two rear leg tubes 22, a tension spring is arranged in one of the rear leg tubes 22, the free end of the tension spring is connected to the sliding block 7, and the rear leg tube 22 is provided with a slot for the tension spring to drive the sliding block 7 to move, and the locking assembly 5 is arranged in the other rear leg tube 22, the lock catch 53 can extend out of the rear leg tube 22 and extend into the recess 71 of the sliding block 7. Figures 1-4

[0041] Another embodiment of the present application is that when the rear leg tube 22 is two parallel tubes, the upper end is provided with a connecting joint 20 for fixing the two parallel tubes, the upper end of the connecting joint 20 is provided with two hinged joints for respectively hingedly connecting the front leg frame 1 and the rear leg frame 2, and the locking structure of the sliding block 7 is arranged in the lower end cavity of the connecting joint 20. The connecting joint 20 can moderate the connection angle of the front leg tube of the front leg frame 1 and the handle assembly 4, and can also make the frame parts easier to be mass-produced and assembled, and facilitate the maintenance of the sliding 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 leg tube 22, which is long on one side and short on the other side. The long side can be used to install the locking assembly 5, and the other side is convenient for installing the elastic member 70 connected with the sliding block 7.

[0042] ​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 frame 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, the front legs 12 are parallel to or in a straight line with the handle rod 42 after the front frame 1 and the handle assembly 4 are unfolded. More preferably, the rear frame tubes 22 are at right angles to the front legs 12 and the handle rod 42 after the frame is unfolded, 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 Figure 7

[0043] Further, the child bicycle 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 moves downward, the handrail 9 can be folded inside or outside the axial direction of the rear frame tube 22 without rotating or disassembling, and does not occupy the space after folding.

[0044] 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 disassembled. 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.

[0045] For the child bicycle frame, each unlocked part is preferably matched with a reset part, so that the part (such as the pull block 52, the lock key 73, the lock catch 53, etc.) can be reset to the state before unlocking when the frame is unfolded, facilitating automatic folding of the child bicycle next time.

[0046] When the child bicycle frame needs to be folded, the rotary unlocking switch 61 is operated to rotate and drive the pull rope 60 to move the locking assembly 5, so that the sliding block 7 is unlocked from the lock catch 53, and the sliding block 7 moves to the lower end of the rear frame tube 22 under the action of the tension spring of the elastic member 70, and the linkage rod 8 hingedly connected to the sliding block 7 moves downward and rotates, thereby driving the seat frame 3 and the handle assembly 4 to be folded towards the rear frame 2, and the front frame 1 is also folded towards the rear frame 2.​

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); a handrail (9) detachably provided on the sliding block (7); the rear frame (2) comprises a cross beam (21) connecting 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); the locking assembly (5) comprises a lock seat (51) provided on the rear tube (22), the lock seat (51) being provided with a pulling 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 pulling block (52) being connected to a pulling rope (60) of the unlocking assembly (6), the pulling block (52) being capable of driving the lock catch (53) to swing when moving, so as to lock or release the sliding block (7); after being unlocked, the sliding block (7) is capable of sliding and driving the front frame (1), the seat frame (3) and the handlebar assembly (4) to approach the rear frame (2) for folding, the handrail (9) can be folded on an inside or an outside of an axial direction of the rear tube without rotating or detaching.

2. The stroller frame of claim 1, wherein the rear tube (22) is internally provided with an elastic member (70) for accelerating the sliding block (7) to move in a direction of the rear wheel after being unlocked.

3. The stroller frame of claim 1 or 2, wherein the rear tube (22) is internally provided with an axial sliding groove (221), the sliding block (7) slides along the sliding groove (221).

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

5. The stroller frame of claim 4, wherein the rear tube (22) is at a right angle with the front legs (12) and the handlebar rod (42) after the frame is unfolded.

6. The stroller frame of claim 1, wherein The rear leg pipe (22) is two parallel pipes, the upper end of which is provided with a connecting joint (20) for fixing the two parallel pipes, the upper end of the connecting joint (20) is provided with two hinge joints for respectively hingingly connecting the front leg frame (1) and the rear leg frame (2), and the locking structure of the sliding block (7) is arranged in the lower end cavity of the connecting joint (20).

7. The stroller frame of claim 1, wherein The unlocking assembly (6) comprises a rotary unlocking switch (61) arranged on the handle of the handle assembly (4) and a pull rope (60) driven and pulled by the rotary unlocking switch (61).

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