CN114454949A - Folding children's cycle - Google Patents

Abstract

The utility model provides a folding child's bike, including having the frame that expandes position and folding position, set up in a plurality of wheel subassemblies of frame bottom, the frame includes the base, overlap with the base and establish and can regard as the chassis frame of trip shaft with self central line, around folding a connecting rod that the axle rotation set up on the base, the axial lead of folding an axle is mutually perpendicular with the axial lead of trip shaft space, the connecting rod pendulum section has on the connecting rod, the chassis frame has fixed upper limit portion, lower limit portion, the connecting rod pendulum section is located between upper limit portion and the lower limit portion. When the frame is folding or expand the in-process, the connecting rod pendulum section supports on last spacing portion or lower spacing portion, drives the relative base of return pulley frame and rotates to realize that the frame expandes the effect that the wheel subassembly just stretched out downwards in step, and the wheel subassembly just upwards packed up in step when the frame is folding, overall design simple structure expandes folding convenient operation, folding back is small, and preparation low cost.

Description

folding stroller

technical field

The invention belongs to the field of children's products, in particular to a folding baby carriage.

Background technique

A foldable stroller usually includes a foldable frame, a wheel assembly mounted on the lower part of the frame, a locking device capable of locking the state of the frame, and a body support device mounted on the frame for an infant, such as a seat pocket , seats, sleeping baskets, etc. It can be used for infants and young children when unfolded, and can be used as a means of transportation when pushed by adults. When not in use, it can be folded to reduce the volume, which is convenient for storage or transportation.

As a folding stroller, it is stable in the unfolded position, easy to fold, and miniaturized after being folded, which has always been a common pursuit. In the past, most frames only considered how to fold the frame reasonably, so that the volume after folding was as small as possible. When the frame was folded, the multiple wheel assemblies protruding downward could not be folded, and the volume was still large. In order to further reduce the volume of the frame after folding. At present, the wheel assemblies of some foldable strollers can be unfolded or folded independently relative to the frame, but as a stroller, the operation of folding or unfolding as a whole is cumbersome.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a folding stroller.

In order to solve the above technical problems, the technical solution adopted in the present invention is: a folding baby carriage, comprising a frame having an unfolded position and a folded position, and a plurality of wheel assemblies arranged at the bottom of the frame, when the frame is in the In the unfolded position, each of the wheel assemblies respectively protrudes downward from the frame, and when the frame is in the folded position, each of the wheel assemblies is folded relative to the frame, and the frame It includes a base, a bottom wheel frame that is sleeved with the base and can use its own centerline as a turning axis, a connecting rod that is rotatably arranged on the base around a folding axis, and the axis of the folding axis is connected to the axis of the folding axis. The axis line of the turning shaft is perpendicular to the space, the connecting rod has a connecting rod swing section, the bottom wheel frame has a fixed upper limit part and a lower limit part, and the connecting rod swing section is located at the upper limit position At least one of the wheel assemblies is installed on the bottom wheel frame between the lower limit portion and the lower limit portion. When the frame is converted to the unfolded position or to the folded position, the connecting rod is opposite to the base. Rotating around the folding axis, the link swing section abuts on the lower limit portion or hooks on the upper limit portion to urge the bottom wheel frame to rotate relative to the base.

In some embodiments, a rotation limiting structure is provided between the bottom wheel frame and the base to limit the range of rotation angles of the two, and when the vehicle frame is in the unfolded position, the link swing section is pressed against on the lower limit portion.

In some embodiments, when the frame is in the folded position, the link swing section is hooked or pressed against the upper position portion.

In some embodiments, an open movable space is formed between the upper limit portion and the lower limit portion, and the connecting rod pendulum is provided with a structure that is convenient to be connected with the upper limit portion and the lower limit portion. A matched control driving part, the control driving part is located in the movable space.

In some embodiments, the wheel assembly includes a front wheel assembly and a rear wheel assembly, the front wheel assembly is disposed at the front end of the bottom wheel frame, and the rear wheel assembly is disposed at the bottom of the bottom wheel frame At the rear end, the bottom wheel frame includes a bottom wheel shaft section and a rear wheel joint fixed at the rear end of the bottom wheel shaft section, the turning shaft is the centerline of the bottom wheel shaft section, and the turning shaft is along the extending in the front-rear direction, the rear wheel assembly is arranged on the rear wheel joint portion, the upper limit portion is arranged on the bottom wheel shaft segment or the upper portion of the rear wheel joint portion, and the lower limit portion is arranged on the upper portion of the rear wheel joint portion. on the rear wheel joint.

In some embodiments, the vehicle frame includes side brackets located on the left and right sides, a human body support mechanism disposed between the left and right side brackets, each of the side brackets includes the bottom wheel bracket, and further It includes a front support frame whose lower end is pivotally connected with the base around the folding two axes, the bottom wheel frame also includes a front wheel joint fixed to the front end of the bottom wheel shaft section, and the front wheel assembly is arranged on the bottom wheel. On the front wheel joint part, a deployment stop mechanism for locking or unlocking the two is provided between the lower part of the front bracket and the front wheel joint part.

In some embodiments, the side bracket further includes the connecting rod, a push rod frame slidably disposed on the front support frame, and an outer sliding sleeve, and the upper end of the connecting rod is connected to the outer sliding sleeve. The lower part of the sleeve is pivotally connected around three folding axes, and the first folding axis, the second folding axis, and the three folding axes respectively extend along the left and right directions and are parallel.

In some embodiments, the side bracket further includes a push rod frame slidably arranged on the front support frame, a push rod locking mechanism is provided between the front support frame and the push rod frame, and the A sliding sleeve locking mechanism is arranged between the front support frame and the outer sliding sleeve.

In some implementations, the lower end of the push rod holder has a push rod actuating portion that sequentially unlocks the sliding sleeve locking mechanism and the deployment and rotation stop mechanism when sliding downwards.

In some embodiments, the base includes a bottom front pedal extending in the left-right direction at the front, two bottom mounting portions symmetrical to each other and located at the rear, and each of the bottom wheel frames can only be rotatably inserted. In the corresponding bottom mounting portion and the corresponding side portion of the bottom front pedal, each bottom mounting portion has a rotation plane for the connecting rod to rotate, and the folding axis is located on the bottom mounting portion and perpendicular to the rotation plane, the two folding shafts are located on the bottom front pedal, and the connecting rod pendulum sections on the left and right sides are fixedly connected through the connecting rod transverse sections to form a rigid whole. During the transition of the frame to the unfolded position or to the folded position, the link swing sections on the left and right sides synchronously control the left and right front wheel assemblies and the left and right rear wheel assemblies to extend downward or move closer to the middle synchronously. .

The scope of the present invention is not limited to the technical solutions formed by a specific combination of the above technical features, but also covers other technical solutions formed by any combination of the above technical features or their equivalents. For example, a technical solution or the like is formed by replacing the above-mentioned features with the technical features disclosed in this application (but not limited to) with similar functions.

Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art: a folding baby carriage of the present invention mainly utilizes the bottom wheel frame, the base and the connecting rod in the frame, and the bottom wheel of the wheel assembly is installed. The frame is sleeved with the base and can be rotatably arranged, the connecting rod is rotatably connected to the base, and the swing section of the connecting rod is located between the upper limit part and the lower limit part. When the frame is folded or unfolded, the swing section of the connecting rod is opposite to the base When the angle changes, the bottom wheel frame is driven to rotate relative to the base by contacting the upper limit or lower limit, so that when the frame is unfolded, the wheel assembly extends downward synchronously, and when the frame is folded, the wheel assembly synchronously retracts upward. The utility model has the advantages of simple overall design and structure, convenient unfolding and folding operations, small volume after folding, and low production cost. Description of drawings

Accompanying drawing 1 is a three-dimensional schematic diagram 1 of unfolding the frame of a folding baby carriage;

Accompanying drawing 2 is the schematic side view of unfolding of the frame of the folding baby carriage;

Accompanying drawing 3 is the two-dimensional schematic diagram of the frame exhibition of folding children's bicycles;

Accompanying drawing 4 is the three-dimensional schematic diagram one after the push rod frame is lowered;

Accompanying drawing 5 is two-dimensional schematic diagram two after the push rod frame is lowered;

Accompanying drawing 6 is the state diagram 1 in the frame folding process;

Accompanying drawing 7 is the state diagram 2 in the frame folding process;

Accompanying drawing 8 is the folded perspective schematic diagram of the frame of the foldable children's vehicle;

Accompanying drawing 9 is the partial structure schematic diagram of rear wheel assembly being installed on the bottom wheel frame;

Among them: 1. Frame; 2. Front wheel assembly; 3. Rear wheel assembly;

10. Base; 101. Bottom front pedal; 102. Bottom mounting part;

11. Bottom wheel frame; 11a, upper limit part; 11b, lower limit part; 111, bottom wheel shaft section; 112, front wheel joint part; 113, rear wheel joint part;

12. Connecting rod; 121. Swing section of connecting rod;

13. Front support frame; 14. Push rod frame; 15. Outer sliding sleeve; 16. Deployment anti-rotation mechanism;

X1, fold one axis; X2, fold two axis; X3, fold three axis; X4, flip axis.

Detailed ways

A foldable stroller generally includes a frame 1 having an unfolded position and a folded position, and a plurality of wheel assemblies disposed at the bottom of the frame 1 . The wheel assembly is divided into front wheel assembly and rear wheel assembly according to the front and rear positions. The front wheel assembly usually adopts a swivel wheel. When the frame 1 is in the unfolded position for children to ride, each wheel assembly extends downward from the frame 1 and can roll on the ground. When the frame 1 is in the folded position, each wheel assembly automatically follows the frame It is folded and folded automatically, that is, it is automatically folded relative to the frame 1, and the small size is convenient for storage and handling.

In this embodiment, as shown in FIGS. 1-8 , the vehicle frame 1 includes a base 10 , side brackets formed on the base 10 and located on the left and right sides, and a human body support mechanism disposed between the left and right side brackets. The base 10 may be a whole surrounding frame, but in order to save materials, in this embodiment, the base 10 is set separately and divided into three pieces. The base 10 includes a bottom front pedal 101 located at the front extending in the left-right direction, and two bottom mounting portions 102 located at the rear, which are symmetrical to each other.

The side brackets on each side include a bottom wheel frame 11 that is rotatably passed through the base 10 (one side of the bottom front pedal 101 and the bottom mounting portion 102 of the corresponding side) and takes its center line as the turning axis X4, and is folded around an axis X1 The connecting rod 12 rotatably arranged on the base 10, the front support frame 13 pivotally connected with the lower end of the base 10 around the folding two-axis X2, the push rod frame 14 slidably inserted in the front support frame 13, and the sliding sleeve mounted on the front The outer sliding sleeve 15 outside the bracket 13 .

The upper end of the connecting rod 12 is pivotally connected with the lower part of the outer sliding sleeve 15 around the folding three-axis X3. The first folding axis X1, the second folding axis X2, and the third folding axis X3 respectively extend along the left and right directions and are parallel. The length of the bottom wheel frame 11 is arranged in the front-rear direction, and the inversion axis X4 extends in the front-rear direction. A front wheel assembly 2 is installed at the front of the bottom wheel frame 11 , and a rear wheel assembly 3 is installed at the rear.

A push rod locking mechanism is arranged between the front support frame 13 and the push rod frame 14. The push rod locking mechanism locked by the sliding push rod frame 14 is used for height adjustment and locking of the push rod frame in the unfolded position. When the frame needs to be folded Unlocking retracts the push rod holder 14, etc. The push rod locking mechanism is a common structure and will not be described in detail.

A sliding sleeve locking mechanism is provided between the front support frame 13 and the outer sliding sleeve 15. The sliding sleeve locking mechanism is not an invention, and any locking mechanism between the sliding relationships can be applied. For example, a spring pin or a spring hook is provided on the outer sliding sleeve 15. Wait, it will be automatically inserted into the lock hole of the front support frame when unfolded. When the push rod frame 14 slides down to a certain position, it pushes the spring pin or the spring hook, and pushes it out to unlock the sliding sleeve locking mechanism, and the frame can be folded. Of course, it is also possible to set the buttons to be controlled independently without borrowing the push rod holder 14 .

As shown in Figures 1-9, the connecting rod 12 has a connecting rod swing section 121, the bottom wheel frame 11 has a fixed upper limit part 11a and a lower limit part 11b, and the connecting rod swing section 121 is located at the upper limit part 11a and the lower limit between the positions 11b. As shown in FIGS. 6-8 , when the frame 1 is converted from the unfolded position to the folded position, the outer sliding sleeve 15 slides down along the front support frame 13 , so that the connecting rod 12 rotates relative to the bottom mounting portion 102 of the base 10 . When the folding axis X1 rotates, the connecting rod pendulum 121 lifts up against the upper limit portion 11a, and lifts it upward, causing the bottom wheel frame 11 to rotate relative to the base 10 around the inversion axis X4, and the wheel assembly is retracted upward.

A rotation limiting structure is arranged between the bottom wheel frame 11 and the base 10 to limit the rotation angle range of the two. The rotation limiting structure is not an invention point. The arc angle of the groove limits the rotation range of the bottom wheel frame around the turning axis X4, such as 85°-95°. When the frame 1 is in the unfolded position, the bottom wheel frame rotates downward relative to the base 10 to the limit position, and this When the wheel is perpendicular to the horizontal plane, as shown in Fig. 3 and Fig. 9 , at this time, the connecting rod swing section 121 presses against the lower limit portion 11b to lock the position of the bottom wheel frame.

An open movable space is formed between the upper limit portion 11a and the lower limit portion 11b. The link pendulum 121 has a control drive portion that is convenient to cooperate with the upper limit portion 11a and the lower limit portion 11b, and the control drive portion is located in the movable space. . The movement space can compensate for the movement distance of the connecting rod 12 .

Regarding the detailed structure of the wheel assembly, the wheel assembly includes a front wheel assembly 2 and a rear wheel assembly 3 . As shown in FIGS. 2 and 3 , the bottom wheel frame 11 includes a bottom wheel shaft section 111 , a rear wheel joint 113 fixed to the rear end of the bottom wheel shaft section 111 , and a front wheel joint fixed to the front end of the bottom wheel shaft section 111 Part 112, the turning axis X4 is the center line of the bottom wheel shaft section 111, the rear wheel joint part 113 is provided with the rear wheel assembly 3, the front wheel assembly 2 is disposed on the front wheel joint part 112, the upper limit part 11a, the lower limit part 11b are all arranged on the rear wheel joint portion 113, which is convenient for mold opening and integral fabrication. Alternatively, in order to satisfy other folding principles of the frame, the upper limit portion and the lower limit portion may also be provided on the front wheel joint portion.

As shown in FIG. 1 , between the lower part of the front bracket 13 and the front wheel joint part 112 , a deployment anti-rotation mechanism 16 for locking or unlocking the two is provided. The function of the deployment anti-rotation mechanism 16 is to make the state of the vehicle frame 1 in the deployed position more stable. For example, the lower part of the front support frame 13 is rotated or slidably provided with a movable spring tongue with an extended position and a retracted position, and the front wheel joint portion 112 is provided with a rotation-stop locking hole. The spring tongue is automatically inserted into the anti-rotation lock hole. When the push rod frame 14 is lowered to the bottom, it is pressed on the movable spring tongue to make it exit the anti-rotation lock hole, and the frame can be folded in sequence as shown in Figures 6-8. The button switch of the active tongue can be set separately.

Each bottom wheel frame 11 can only be rotatably inserted in the corresponding bottom mounting portion 102 and the corresponding side portion of the bottom front pedal 101, and each bottom mounting portion 102 has a rotation plane for the connecting rod 12 to rotate, respectively. The axis X1 is located on the bottom mounting part 102 and is perpendicular to the rotation plane, the second folding axis X2 is located on the bottom front pedal 101, and the left and right side connecting rod swing sections 121 are fixedly connected through the connecting rod transverse sections to form a rigid whole, When the frame 1 is converted to the unfolded position or to the folded position, the left and right side link pendulum sections 121 synchronously control the left and right front wheel assemblies 2 and the left and right rear wheel assemblies 3 to extend downward or to move toward the middle synchronously. The other side is stretched, the frame is folded in one go, and the volume is small after folding.

The folding process of this embodiment: the unlocked push rod frame 14 moves downward, the sliding sleeve locking mechanism is unlocked, the sliding sleeve 15 also moves downward, the push rod frame 14 moves downward to unlock the unfolding anti-rotation mechanism 16, and the sliding sleeve 15 downward During the moving process, the connecting rod 12 is driven to rotate around the folding axis X1, the connecting rod pendulum 121 is lifted up against the upper limit portion 11a, and it is lifted up, so that the bottom wheel frame 11 is rotated relative to the base 10 around the turning axis X4. , the wheel assembly is retracted upward. When unfolding, the push rod frame 14, the front support frame 13, etc. are lifted up, and then the push rod frame 14 is pulled up, and the vehicle frame is unfolded synchronously.

The above-mentioned embodiments are only intended to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those who are familiar with the art to understand the content of the present invention and implement accordingly, and cannot limit the protection scope of the present invention by this. All equivalent changes or modifications made according to the spirit of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A folding baby carriage, comprising a frame (1) having an unfolded position and a folded position, and a plurality of wheel assemblies arranged at the bottom of the frame (1), when the frame (1) is in the unfolded position , each of the wheel assemblies respectively protrudes downward from the frame (1), and when the frame (1) is in the folded position, each of the wheel assemblies is respectively retracted relative to the frame (1). It is characterized in that: the frame (1) includes a base (10), a bottom wheel frame (11) that is sleeved with the base (10) and can use its own centerline as a turning axis (X4), and a bottom wheel frame (11) that is sleeved with the base (10) and can use its own centerline as a turning axis (X4), A folding axis (X1) rotates the connecting rod (12) arranged on the base (10), and the axis line of the folding axis (X1) is spaced perpendicular to the axis line of the flipping axis (X4). , the connecting rod (12) has a connecting rod swing section (121), the bottom wheel frame (11) has a fixed upper limit part (11a) and a lower limit part (11b), the connecting rod swing section (121) is located between the upper limit portion (11a) and the lower limit portion (11b), at least one of the wheel assemblies is mounted on the bottom wheel frame (11), when the vehicle frame (1) During the transition to the unfolded position or to the folded position, the connecting rod (12) rotates around the folding axis (X1) relative to the base (10), and the connecting rod pendulum (121) abuts against the The lower limit portion (11b) or hook on the upper limit portion (11a) urges the bottom wheel frame (11) to rotate relative to the base (10). 2. The folding stroller according to claim 1, characterized in that: a rotation limiting structure is arranged between the bottom wheel frame (11) and the base (10) to limit the range of the rotation angle of the two, when the frame ( 1) In the unfolded position, the link swing segment (121) is pressed against the lower limit portion (11b). 3. The foldable stroller according to claim 2, characterized in that: when the frame (1) is in the folded position, the link pendulum (121) is hooked or pressed against the upper limit portion (11a) superior. 4. The folding stroller according to claim 1, characterized in that: an open movable space is formed between the upper limit part (11a) and the lower limit part (11b), and the link swing section (121) is on the upper There is a control driving part which is convenient to cooperate with the upper limit part (11a) and the lower limit part (11b), and the control drive part is located in the movable space. 5. The folding stroller according to any one of claims 1 to 4, wherein the wheel assembly comprises a front wheel assembly (2) and a rear wheel assembly (3), and the front wheel assembly (2) is arranged on the The front end of the bottom wheel frame (11), the rear wheel assembly (3) is arranged at the rear end of the bottom wheel frame (11), and the bottom wheel frame (11) includes a bottom wheel shaft section (111) 2. The rear wheel joint portion (113) fixed to the rear end of the bottom wheel shaft segment (111), the inversion axis (X4) is the centerline of the bottom wheel shaft segment (111), and the inversion axis (X4) Extending in the front-rear direction, the rear wheel assembly (3) is arranged on the rear wheel joint portion (113), and the upper position portion (11a) is arranged on the bottom wheel shaft section (111) or the rear wheel On the upper part of the joint part (113), the lower limit part (11b) is arranged on the rear wheel joint part (113). 6. The folding stroller according to claim 5, characterized in that: the frame (1) comprises side brackets located on the left and right sides, and a human body support mechanism arranged between the left and right side brackets, each of the side brackets The bracket includes the bottom wheel frame (11), and also includes a front support frame (13) pivotally connected with the lower end of the base (10) around a folding two-axis (X2), and the bottom wheel frame (11) further includes a front wheel joint part (112) fixed to the front end of the bottom wheel shaft segment (111), the front wheel assembly (2) is arranged on the front wheel joint part (112), the front support frame (13) ) and the front wheel joint portion (112) is provided with a deployment stop mechanism (16) for locking or unlocking the two. 7. The folding stroller according to claim 6, characterized in that: the side bracket further comprises the connecting rod (12), and outer sliding sleeves (15) respectively slidably arranged on the front bracket (13), so The upper end of the connecting rod (12) is pivotally connected with the lower part of the outer sliding sleeve (15) around the three-folding axis (X3), the first-folding axis (X1), the second-folding axis (X2), and the three-folding axis (X2). The three folding axes (X3) respectively extend along the left and right directions and are parallel. 8. The folding stroller according to claim 7, characterized in that: the side support further comprises a push rod frame (14) slidably arranged on the front support frame (13), and the front support frame (13) is connected to the front support frame (13). A push rod locking mechanism is provided between the push rod frames (14), and a sliding sleeve locking mechanism is provided between the front support frame (13) and the outer sliding sleeve (15). 9. The foldable stroller according to claim 8, characterized in that: the lower end of the push rod frame (14) has a pusher for unlocking the sliding sleeve locking mechanism and the deployment anti-rotation mechanism (16) in sequence when sliding downwards. lever trigger. 10. The folding stroller according to claim 7, characterized in that: the base (10) comprises a bottom front pedal (101) located at the front extending in the left-right direction, two bottom mounting parts (102) that are respectively symmetrical to the left and right and located at the rear ), each bottom wheel frame (11) can only be rotatably inserted in the corresponding bottom mounting portion (102) and the corresponding side portion of the bottom front pedal (101), each bottom mounting portion (101) The connecting rods (12) are respectively provided with rotating planes on the parts (102), and the first folding axis (X1) is located on the bottom mounting part (102) and is perpendicular to the rotating plane. The two axles (X2) are located on the bottom front pedal (101), and the connecting rod pendulum segments (121) on the left and right sides are fixedly connected through the connecting rod transverse segments to form a rigid whole. 1) During the transition to the unfolded position or to the folded position, the connecting rod pendulum segments (121) on the left and right sides synchronously control the left and right front wheel assemblies (2) and the left and right rear wheel assemblies (3) to synchronously move. Extend down or move toward the middle simultaneously.

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