Three-folding type baby carriage frame

Abstract

The utility model discloses a three-folding type baby carriage frame which comprises a front foot carriage frame and a rear foot carriage frame, and the upper end of the rear foot carriage frame is hinged to the upper end of the front foot carriage frame. The front part of the seat frame is hinged with the front foot frame; the lower end of the handle assembly is hinged to the upper end of the rear foot frame; the control system enables the frame to be unlocked, folded or unfolded and locked, and comprises a locking assembly and an unlocking assembly arranged on the handle assembly; the sliding block is arranged on the rear foot frame and can be locked and fixed or unlocked to slide; the linkage rod is hinged to the handle assembly and the sliding block, and the rear portion of the seat frame is hinged to the linkage rod; and after being unlocked, the sliding block can slide and drive the front foot frame, the seat frame and the handle assembly to be close to and folded towards the rear foot frame. Folding of the front foot stool, the rear foot stool, the seat frame, the handrails and the handlebar rod is achieved through a linkage system, and folding is convenient.

Description

Technical Field

[0001] The utility model relates to a three-fold baby carriage frame and relates to the technical field of baby carriages. Background Art

[0002] Strollers are a must-have product for most infants and young children when going out. As the demand for strollers continues to increase, strollers themselves are becoming more and more demanding in terms of stability, safety, lightness, small size, and easy and quick folding.

[0003] There are many kinds of foldable baby strollers available, which have evolved from two-hand folding to one-hand one-button linkage folding. The structure of the currently popular three-fold stroller is still relatively complicated. The folding of the body is a system, and the seat is a system. The two sets of linkage systems realize the folding of the three-fold stroller. After folding, the volume is not neat and compact, which is not conducive to storage. Utility Model Content

[0004] The utility model aims to provide a tri-fold baby carriage frame with a simple structure, a small and neat volume after folding, the baby carriage frame can be operated with one hand, the front and rear legs and the armrests can be folded quickly and simultaneously in one action, and the armrests do not occupy the folding space after being folded.

[0005] The utility model is realized by the following technical solutions:

[0006] The tri-fold baby carriage frame is characterized by comprising:

[0007] A front foot frame, the lower end of which is provided with a front wheel;

[0008] A rear foot frame, the lower end of which is provided with a rear wheel, and the upper end of the rear foot frame is hinged to the upper end of the front foot frame;

[0009] a seat frame, the front portion of which is hinged to the front leg frame;

[0010] A handlebar assembly, the lower end of which is hinged to the upper end of the rear leg frame;

[0011] A control system, which enables the frame to be unlocked and folded or unfolded and locked, comprising a locking assembly and an unlocking assembly provided on the handle assembly;

[0012] A slider, which is arranged on the rear foot frame, and the slider can be locked and fixed or unlocked and slid;

[0013] A linkage rod is hinged to the handle assembly and the slider, and the rear portion of the seat frame is hinged to the linkage rod;

[0014] After being unlocked, the slide block can slide and drive the front foot frame, the seat frame and the handlebar assembly to move toward and fold the rear foot frame.

[0015] The tri-fold baby carriage frame as described above is characterized in that the rear leg frame includes a crossbeam connecting the rear wheels and rear leg tubes respectively arranged at both ends of the crossbeam, and the upper ends of the rear leg tubes are provided with two connection ports, which are respectively hinged to the front leg frame and the handlebar assembly, and each rear leg tube is provided with the sliding block.

[0016] The tri-fold baby carriage frame as described above is characterized in that the locking assembly includes a lock seat arranged on the rear leg tube, the lock seat is provided with a pull block movable along its axial direction and a swingable lock buckle, the slider is provided with a concave cavity cooperating with the lock buckle, the pull block is connected to the pull rope of the unlocking assembly, and when the pull block moves, it can drive the lock buckle to swing, thereby locking or releasing the slider.

[0017] The tri-fold baby carriage frame as described above is characterized in that an elastic member is provided in the rear leg tube for accelerating the movement of the slider toward the rear wheel when the slider is unlocked.

[0018] The tri-fold baby carriage frame as described above is characterized in that an axial slide groove is provided in the middle of the rear leg tube, and the sliding block slides along the slide groove.

[0019] The tri-fold baby carriage frame as described above is characterized in that the front foot frame includes a pedal beam and front supporting feet at both ends thereof, the handlebar assembly includes a handle and a handlebar rod, and after the front foot frame and the handlebar assembly are unfolded, the front supporting feet are parallel to or in a straight line with the handlebar rod.

[0020] The tri-fold baby carriage frame as described above is characterized in that after the frame is unfolded, the rear leg tubes are at right angles to the front legs and the handlebar.

[0021] The tri-fold baby carriage frame as described above is characterized in that it also includes an armrest which is detachably arranged on the sliding block.

[0022] The tri-fold baby carriage frame as described above is characterized in that the rear leg tubes are two parallel tubes, and a connecting joint is provided at the upper end thereof to fix the two parallel tubes. Two hinged heads are provided at the upper end of the connecting joint, which are respectively hinged to the front leg frame and the rear leg frame, and the locking structure of the slider is arranged in the lower end cavity of the connecting joint.

[0023] The tri-fold baby carriage frame as described above is characterized in that the unlocking assembly comprises a rotation unlocking switch provided on the handle of the handle assembly and a pull rope driven by the rotation unlocking switch.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] The front foot frame, the rear foot frame and the seat frame of the utility model can be folded up at the same time by sliding after the slider is unlocked and driven by the connecting rod, the frame linkage folding system is reduced, the number of parts is reduced, the weight of the whole vehicle frame is reduced, the frame structure is simple and light, and the space occupied after folding is smaller.

[0026] The elastic member that accelerates the sliding movement in the rear foot tube of the utility model cooperates with the control system to realize the one-key automatic folding of the whole vehicle frame, and the handrail is also automatically folded on the side of the rear foot tube axis as the slider moves. A group of linkage systems realizes the folding of the front and rear foot frames, seat frames, handrails and handlebars, and the folding is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0028] Figure 2 It is a partial structural decomposition schematic diagram of the utility model;

[0029] Figure 3 This is an exploded schematic diagram of the rear foot frame and the handrail of the utility model;

[0030] Figure 4 for Figure 3 A magnified image of point A;

[0031] Figure 5 for Figure 3 The enlarged view of point B;

[0032] Figure 6 A schematic diagram of the structure of the part of the lock extending from the joint;

[0033] Figure 7 It is a schematic diagram of the structure of the utility model after folding. DETAILED DESCRIPTION

[0034] The utility model is further described in detail below in conjunction with the accompanying drawings of the specification.

[0035] like Figure 1-6As shown, a three-fold baby carriage frame comprises a front foot frame 1, a front wheel is provided at the lower end of the front foot frame 2; a rear foot frame 2, a rear wheel is provided at the lower end of the rear foot frame 2, and the upper end of the rear foot frame 2 is hinged to the upper end of the front foot frame 1; a seat frame 3, a front part of which is hinged to the front foot frame 1; a handle assembly 4, a lower end of which is hinged to the upper end of the rear foot frame 2; a control system, which enables the frame to be unlocked and folded or unfolded and locked, and comprises a locking assembly 5 and an unlocking assembly 6 arranged on the handle assembly 4; a slider 7, which is arranged on the rear foot frame 2, and the slider 7 can be locked and fixed or unlocked and slid; a linkage rod 8, which is hinged to the handle assembly 4 and the slider 7 respectively, and the rear part of the seat frame 3 is hinged to the linkage rod 8; after being unlocked, the slider 7 can slide and drive the front foot frame 1, the seat frame 3 and the handle assembly 4 to move closer to the rear foot frame 2 and fold. After being unlocked, the slider 7 can slide along the axial direction of the tube where it is located toward the rear caster wheel, and at the same time drive the linkage rod 8 to approach the slider 7 and slide down together, thereby driving the handle assembly 4 and the seat frame 3 to approach and fold toward the rear foot frame 2. During the folding process of the seat frame 3, the front foot frame 1 rotates and folds toward the rear foot frame 2 with the movement of the seat frame 3 with its upper end hinge point as the center. The entire folding movement is simple and the structure is simple.

[0036] The unlocking assembly 6 includes an unlocking switch that can be operated by one hand and a pull rope 60 connected to the locking assembly 5. The unlocking switch is generally arranged on the handle 41 of the handle assembly 4 for easy operation. An embodiment of the unlocking switch is as follows Figure 1-2 As shown, it is a rotation unlocking switch 61, and the pull rope 60 is driven to move by the rotation unlocking switch 61. The handlebar 42 of the handle assembly 4 can be a single rod, or a retractable or foldable handlebar, and the unlocking assembly 6 can achieve the unlocking of the slider 7 and the handlebar 42. Of course, a reset elastic member is preferably provided on the unlocked locking member so that the unlocked moving locking member can be reset.

[0037] Furthermore, the rear foot frame 2 includes a crossbeam 21 connected to the rear wheel and rear foot tubes 22 respectively arranged at both ends of the crossbeam 21. Two connection ports 23 are provided at the upper ends of the rear foot tubes 22, which are respectively hinged to the front foot frame 1 and the handlebar assembly 4. Each rear foot tube 22 is provided with a slider 7, which drives the connecting parts connected on the same side to move and retract during sliding, and works symmetrically, so that the folding of the whole vehicle frame is smoother.

[0038] The locking assembly 5 includes a lock seat 51 disposed on the rear leg tube 22. The lock seat 51 is provided with a pull block 52 that can move along its axial direction and a swingable lock buckle 53. The slider 7 is provided with a concave cavity 71 that cooperates with the lock buckle 53. The pull block 52 is connected to the pull rope 60 of the unlocking assembly 6. When the pull block 52 moves, it can drive the lock buckle 53 to swing, thereby locking or releasing the slider 7. Figure 4 and 5As shown, one end of the lock buckle 53 is hinged to the lock seat 51, and an inclined groove 531 is provided on the lock buckle 53. The inclined groove 531 extends 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 inclined groove 531. When the pull block 52 moves upward, the pull rod 521 moves upward from the bottom of the inclined groove 531, and the lock buckle 53 swings out of the concave cavity 71 of the slider 7, thereby unlocking the slider 7, and the slider 7 can move downward.

[0039] Preferably, in order to better realize the automatic folding of the frame, an elastic member 70 is provided in the rear leg tube 22 to accelerate the movement of the slider 7 toward the rear wheel when the slider 7 is unlocked. The rear leg tubes 22 on both sides are provided with elastic members 70, and 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 is connected to the slider 7. After the slider 7 is unlocked, it can slide down quickly under the force 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 fold.

[0040] The rear leg tube 22 can be a single body with a cavity inside, an elastic member 70 is placed on one axial side, a locking assembly 5 of the slider 7 is placed on the other side, and an axial slide groove 221 is provided in the middle for the slider 7 to slide along. Figure 1-4 As shown in 7, the rear leg tubes 22 on each side are two parallel tubes, which are connected side by side to the ends of the cross beam 21, and a slide groove 221 of the slider 7 is formed between the two rear leg tubes 22. A tension spring is arranged in one rear leg tube 22, and the free end of the tension spring is connected to the slider 7. The rear leg tube 22 is provided with a slot so that the tension spring can drive the slider 7 to move. A locking assembly 5 is arranged in the other rear leg tube 22, and the lock buckle 53 can extend out of the rear leg tube 22 and extend into the concave cavity 71 of the slider 7.

[0041] In another embodiment of the utility model, when the rear leg tube 22 is two parallel tubes, a connecting joint 20 is provided at the upper end to fix the two parallel tubes, and two hinged joints are provided at the upper end of the connecting joint 20 to respectively hinge the front leg frame 1 and the rear leg frame 2, and the locking structure of the slider 7 is arranged in the lower end cavity of the connecting joint 20. The connecting joint 20 can ease the connection angle between the front leg tube of the front leg frame 1 and the handlebar assembly 4, and can also make the frame parts easier to batch and assemble, and at the same time facilitate the maintenance of the slider 7 and the locking assembly 5. Preferably, the lower end of the connecting joint 20 that sleeves the two open ends 23 of the rear leg tube 22 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 to connect with the slider 7.

[0042] The front foot frame 1 includes a pedal beam 11 and front supporting feet 12 at both ends of the pedal beam 11, the handlebar assembly 4 includes a handle 41 and a handlebar rod 42, and the upper end of the rear foot tube 22 is respectively and correspondingly hinged to the lower end of the handlebar rod 42 and the upper end of the front supporting foot 12. Preferably, after the front foot frame 1 and the handlebar assembly 4 are unfolded, the front supporting foot 12 and the handlebar rod 42 are parallel or in a straight line. More preferably, after the frame is unfolded, the rear foot tube 22 is at a right angle to the front supporting foot 12 and the handlebar rod 42, and the right-angled rounded corners are more beautiful and comfortable, and are smooth and not easy to hurt the user. When folded, the entire frame is neater and occupies less space, such as Figure 7 shown.

[0043] Furthermore, the tri-fold baby carriage frame of the present invention also includes an armrest 9, which is detachably provided on the slider 7. When the slider 7 is unlocked and moved downward, the armrest 9 can be folded along with the slider 7 to the axial inner or outer side of the rear leg tube 22 without being rotated or disassembled, and does not occupy the space after folding.

[0044] Preferably, the slide block 7 is provided with an armrest mounting seat 72 and a key 73 for fixing the armrest 9, so that the armrest 9 can be freely disassembled. The armrest 9 can be pulled out by pressing the key 73, and the armrest 9 can be locked by releasing the key 73 after the armrest 9 is installed.

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

[0046] When the utility model needs to be folded, the rotating unlocking switch 61 is operated to rotate, thereby driving the pull rope 60 to move and unlock the locking assembly 5, so that the slider 7 is released from the lock of the lock buckle 53, and the slider 7 moves toward 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 slider 7 moves downward and rotates accordingly, thereby driving the seat frame 3 and the handlebar assembly 4 to be folded toward the rear leg frame 2, and the front leg frame 1 is also folded toward the rear leg frame 2 accordingly.

Claims

1. A three-fold baby carriage frame, characterized in that include: A front bicycle frame (1) having a front wheel at its lower end; A rear foot frame (2) having a rear wheel at its lower end, and an upper end of the rear foot frame (2) is hinged to an upper end of the front foot frame (1); A seat frame (3), the front portion of which is hinged to the front leg frame (1); A handlebar assembly (4), the lower end of which is hinged to the upper end of the rear leg frame (2); A control system, which enables the frame to be unlocked, folded, or unfolded and locked, comprising a locking assembly (5) and an unlocking assembly (6) arranged on the handle assembly (4); A slider (7) is arranged on the rear leg frame (2), and the slider (7) can be locked and fixed or unlocked and slid; A linkage rod (8) is hinged to the handle assembly (4) and the slider (7), and the rear portion of the seat frame (3) is hinged to the linkage rod (8); After being unlocked, the sliding block (7) can slide and drive the front foot frame (1), the seat frame (3) and the handlebar assembly (4) to move toward and fold the rear foot frame (2).

2. The tri-fold baby carriage frame according to claim 1, characterized in that The rear foot frame (2) comprises a crossbeam (21) connected to the rear wheel and rear foot tubes (22) respectively arranged at both ends of the crossbeam (21); the upper ends of the rear foot tubes (22) are provided with two connection ports (23) which are respectively hinged to the front foot frame (1) and the handlebar assembly (4); and each rear foot tube (22) is provided with the sliding block (7).

3. The tri-fold baby carriage frame according to claim 2, characterized in that The locking assembly (5) comprises a locking seat (51) arranged on the rear leg tube (22); the locking seat (51) is provided with a pull block (52) movable along its axial direction and a swingable lock buckle (53); the slider (7) is provided with a concave cavity (71) cooperating with the lock buckle (53); the pull block (52) is connected to the pull rope (60) of the unlocking assembly (6); when the pull block (52) moves, it can drive the lock buckle (53) to swing, thereby locking or releasing the slider (7).

4. The tri-fold baby carriage frame according to claim 3, characterized in that An elastic member (70) is arranged inside the rear leg tube (22) to accelerate the movement of the slider (7) toward the rear wheel when the slider (7) is unlocked.

5. The tri-fold baby carriage frame according to claim 2 or 4, characterized in that An axial sliding groove (221) is provided in the middle of the rear leg tube (22), and the sliding block (7) slides along the sliding groove (221).

6. The tri-fold baby carriage frame according to claim 2, characterized in that The front foot frame (1) comprises a pedal beam (11) and front supporting legs (12) at both ends thereof, and the handlebar assembly (4) comprises a handle (41) and a handlebar rod (42). When the front foot frame (1) and the handlebar assembly (4) are unfolded, the front supporting legs (12) and the handlebar rod (42) are parallel or in a straight line.

7. The tri-fold baby carriage frame according to claim 6, characterized in that When the frame is unfolded, the rear leg tube (22) forms a right angle with the front leg (12) and the handlebar (42).

8. The tri-fold baby carriage frame according to claim 1, characterized in that It also includes an armrest (9) which is detachably arranged on the slider (7).

9. The tri-fold baby carriage frame according to claim 2, characterized in that The rear leg tubes (22) are two parallel tubes, and a connecting joint (20) is provided at the upper end thereof to fix the two parallel tubes. The upper end of the connecting joint (20) is provided with two hinged joints, which are respectively hinged to the front leg frame (1) and the rear leg frame (2). The locking structure of the slider (7) is arranged in the lower end cavity of the connecting joint (20).

10. The tri-fold baby carriage frame according to claim 2, characterized in that 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) to be pulled.

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