CN114162201B - Strollers - Google Patents

Abstract

The invention discloses a baby stroller, which comprises a stroller frame, wherein the stroller frame comprises a front support, a rear support, a push rod assembly, a front lower surrounding rod, a rear lower surrounding rod, a front upper surrounding rod and a rear upper surrounding rod, the upper part of the rear support is rotationally connected with the upper part of the front support, the rear lower surrounding rod is rotationally connected with the lower part of the front support, the rear upper surrounding rod is rotationally connected with the upper part of the front support, the lower part of the push rod assembly is rotationally and slidingly arranged on the rear lower surrounding rod, the front part of the rear lower surrounding rod is rotationally connected with the rear part of the front lower surrounding rod, the front part of the rear upper surrounding rod is rotationally connected with the rear part of the front upper surrounding rod, and the rear part of the rear upper surrounding rod is rotationally and slidingly arranged on the push rod assembly. The child stroller is convenient to fold and operate, and has a compact structure and a small volume after being folded.

Description

Strollers

Technical Field

The present invention relates to the technical field of children's products, and in particular to a children's stroller.

Background Art

Strollers provide great convenience for adults to carry small children for outdoor activities. To facilitate the carrying of the stroller, the stroller can generally be folded.

In the prior art, as a kind of child stroller, most of the child trailers have a complex structure, and the child trailers are composed of many rods, which are inconvenient to fold and have a large volume after folding, which makes it inconvenient to use the child stroller.

Summary of the invention

The purpose of the present invention is to provide a child stroller which is easy to fold and has a compact structure and a small size after folding, in view of the deficiencies in the prior art.

To achieve the above object, the technical solution adopted by the present invention is:

A child stroller, comprising a stroller frame having an unfolded state and a folded state, the stroller frame comprising:

A front bracket, a front wheel assembly being mounted at a lower portion of the front bracket;

A rear support, a rear wheel assembly is mounted on the lower portion of the rear support, and the upper portion of the front support is rotatably connected to the upper portion of the rear support;

A push rod assembly, the push rod assembly is rotatably connected to the rear bracket;

A front lower enclosure rod, the front portion of which is rotatably connected to the lower portion of the front bracket;

A rear lower enclosure rod, wherein the front portion of the rear lower enclosure rod is rotatably connected to the rear portion of the front lower enclosure rod, the rear portion of the rear lower enclosure rod is rotatably connected to the lower portion of the rear bracket, and the lower portion of the push rod assembly is rotatably and slidably disposed on the rear lower enclosure rod;

A front upper enclosure rod, the rear portion of which is rotatably connected to the upper portion of the front bracket via a first shaft;

A rear upper enclosure rod, wherein the front portion of the rear upper enclosure rod is rotationally connected to the upper portion of the rear bracket via a second axis, the front portion of the rear upper enclosure rod is rotationally connected to the rear portion of the front upper enclosure rod via a third axis, and the rear portion of the rear upper enclosure rod is rotatably and slidably arranged on the push rod assembly.

Preferably, the front upper enclosure bar includes a front upper enclosure bar body and a first connecting member fixedly arranged at the rear of the front upper enclosure bar body, and the rear upper enclosure bar includes a rear upper enclosure bar body and a second connecting member fixedly arranged in front of the rear upper enclosure bar body. When the cart frame is in an unfolded state, the first connecting member extends obliquely downward from front to rear, and the second connecting member extends obliquely downward from rear to front, and the rear end portion of the first connecting member is rotatably connected to the front end portion of the second connecting member via the third axis.

Preferably, when the stroller frame is in the unfolded state, the third axis is located between the first axis and the second axis in the front-rear direction.

Preferably, when the stroller frame is in the unfolded state, the third axis is located below the first axis and the second axis, and/or the third axis is located below the rotation connection point between the front bracket and the rear bracket.

Preferably, the cart frame further comprises a first sliding member slidably disposed on the rear lower enclosure rod in a front-rear direction, and the lower portion of the push rod assembly is rotatably connected to the first sliding member.

Preferably, the cart frame further comprises a second sliding member which is slidably arranged on the push rod assembly along the length extension direction of the push rod assembly, and the rear portion of the rear upper enclosure rod is rotatably connected to the second sliding member.

Preferably, the cart frame further comprises a pull rod assembly, and the pull rod assembly is rotatably and slidably arranged on the front lower enclosure rod.

Furthermore, the child stroller has a first usage state and a second usage state. When the child stroller is in the first usage state, the pull rod assembly extends in the front-to-back direction, and the pull rod assembly is located below the front lower enclosure rod. When the child stroller is in the second usage state, the pull rod assembly extends in the up-down direction, and the pull rod assembly is located in front of the front lower enclosure rod.

Furthermore, the pull rod assembly is a telescopic rod assembly that can be extended and retracted along its length direction. When the child stroller is in a first use state, the pull rod assembly is in a retracted state, and when the child stroller is in a second use state, the pull rod assembly is in an extended state.

Preferably, the cart frame further comprises a third sliding member, the third sliding member is rotatably disposed at the front portion of the front lower enclosure rod, and the third sliding member is slidably disposed on the pull rod assembly along a length extension direction of the pull rod assembly.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: when the child stroller of the present invention is folded, as long as the push rod assembly is pressed down, the front frame can be driven to rotate backward and approach the rear frame through the front lower enclosure rod and the rear lower enclosure rod, and the rear upper enclosure rod is rotated downward and approached to the rear frame, and the front upper enclosure rod is driven to rotate downward and approach the front frame, thereby realizing the folding operation of the child stroller. The child stroller is easy to fold and convenient to use, and the structure volume after folding is small, which is convenient to carry and store.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of the child stroller of this embodiment in a first use state;

FIG2 is a schematic side view of the child stroller of this embodiment in a first use state;

Figure 3 is a partial enlarged view of point A in Figure 1;

FIG4 is a perspective view of the child stroller of this embodiment in a second use state;

FIG5 is a schematic side view of the child stroller of this embodiment in a second use state;

FIG6 is a schematic top view of the child stroller of this embodiment in the second use state;

Figure 7 is a partial enlarged view of point A in Figure 6;

FIG8 is a three-dimensional schematic diagram of the child stroller of this embodiment during the folding process (the upper push rod rotates forward and approaches the lower push rod, the pull rod assembly shrinks, and rotates and slides relative to the front lower enclosure rod to be accommodated below the front lower enclosure rod);

FIG9 is a side view of the stroller of this embodiment during the folding process (the upper push rod rotates forward and approaches the lower push rod, the pull rod assembly shrinks, and rotates and slides relative to the front lower enclosure rod to be accommodated below the front lower enclosure rod);

FIG10 is a three-dimensional schematic diagram of the child stroller of this embodiment during the folding process (the push rod assembly rotates downward as a whole and moves closer to the rear bracket, driving the front bracket, the rear bracket, the front lower enclosure rod, the rear lower enclosure rod, the front upper enclosure rod, and the rear upper enclosure rod to rotate relatively);

FIG11 is a side view of the stroller of this embodiment during the folding process (the push rod assembly as a whole rotates downward and approaches the rear bracket, driving the front bracket, the rear bracket, the front lower enclosure rod, the rear lower enclosure rod, the front upper enclosure rod, and the rear upper enclosure rod to rotate relatively);

FIG12 is a perspective view of the child stroller of this embodiment in a folded state;

FIG13 is a schematic side view of the child stroller of this embodiment in a folded state.

Among them: 11, front bracket; 12, rear bracket; 13, push rod assembly; 131, lower push rod; 131a, second sliding member; 132, upper push rod; 14, front lower enclosure rod; 141, third sliding member; 15, rear lower enclosure rod; 151, first sliding member; 161, front upper enclosure rod body; 162, first connecting member; 171, rear upper enclosure rod body; 172, second connecting member; 18, pull rod assembly; 181, lower pull rod; 182, upper pull rod;

21. Front wheel assembly; 22. Rear wheel assembly;

31. First axis; 32. Second axis; 33. Third axis; 34. Fourth axis.

DETAILED DESCRIPTION

The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIGS. 1 to 13 , the child stroller of the present invention includes a stroller frame in an unfolded and folded state, a front wheel assembly 21 disposed at the bottom front portion of the stroller frame, and a rear wheel assembly 22 disposed at the bottom rear portion of the stroller frame.

The cart frame comprises a front bracket 11, a rear bracket 12, a push rod assembly 13, a front lower enclosure rod 14, a rear lower enclosure rod 15, a front upper enclosure rod and a rear upper enclosure rod.

The front wheel assembly 21 is disposed at the lower portion of the front frame 11 , and the rear wheel assembly 22 is disposed at the lower portion of the rear frame 12 .

The upper portion of the front bracket 11 is rotatably connected to the upper portion of the rear bracket 12 via a fourth shaft 34 .

The push rod assembly 13 is rotatably connected to the rear bracket 12 , and the lower portion of the push rod assembly 13 is rotatably and slidably disposed on the rear lower enclosure rod 15 .

The front portion of the front lower enclosure rod 14 is rotatably connected to the lower portion of the front bracket 11 , the rear portion of the front lower enclosure rod 14 is rotatably connected to the front portion of the rear lower enclosure rod 15 , and the rear portion of the rear lower enclosure rod 15 is rotatably connected to the lower portion of the rear bracket 12 .

The rear part of the front upper enclosure rod is rotationally connected to the upper part of the front bracket 11 via the first shaft 31, the front part of the rear upper enclosure rod is rotationally connected to the upper part of the rear bracket 12 via the second shaft 32, the rear part of the front upper enclosure rod is rotationally connected to the front part of the rear upper enclosure rod via the third shaft 33, and the rear part of the rear upper enclosure rod is rotatably and slidably arranged on the push rod assembly 13.

In this embodiment, the push rod assembly includes a lower push rod 131 and an upper push rod 132, and the lower portion of the upper push rod 132 is rotatably connected to the upper portion of the lower push rod 131. The rear portion of the rear upper enclosure rod is rotatably and slidably disposed on the lower push rod 131, the lower push rod 131 is rotatably connected to the rear bracket 12, and the lower portion of the lower push rod 131 is rotatably and slidably disposed on the rear lower enclosure rod 15.

Specifically, the cart frame further includes a first sliding member 151, which is slidably disposed on the rear lower enclosure rod 15 in the front-rear direction, and the lower portion of the lower push rod 131 is rotatably connected to the first sliding member 151. In this embodiment, the first sliding member 151 is a sliding sleeve sleeved on the rear lower enclosure rod 15.

The cart frame further includes a second sliding member 131a, which can be slidably disposed on the lower push rod 131 along the length extension direction of the lower push rod 131, and the rear portion of the rear upper enclosure rod is rotatably connected to the second sliding member 131a. In this embodiment, the second sliding member 131a is a sliding sleeve sleeved on the lower push rod 131.

The front upper enclosure bar includes a front upper enclosure bar body 161 and a first connecting member 162 fixedly arranged at the rear of the front upper enclosure bar body 161. The first connecting member 162 is arranged to be tilted downward from front to rear. The rear portion of the front upper enclosure bar body 161 is rotatably connected to the upper portion of the front bracket 11 through a first shaft 31.

The rear upper enclosure rod comprises a rear upper enclosure rod body 171 and a second connecting member 172 fixedly arranged in front of the rear upper enclosure rod body 171, and the second connecting member 172 is arranged to be tilted downward from the rear to the front. The front part of the rear upper enclosure rod body 171 is rotatably connected to the upper part of the rear bracket 12 through the second shaft 32, and the rear part of the rear upper enclosure rod body 171 is rotatably connected to the second sliding member 131a.

The rear portion of the first connecting member 162 is rotatably connected to the front portion of the second connecting member 172 via the third shaft 33 .

When the cart frame is in the unfolded state, along the front-rear direction, the third shaft 33 and the fourth shaft 34 are both located between the first shaft 31 and the second shaft 32. At the same time, the third shaft 33 is located below the first shaft 31, the second shaft 32 and the fourth shaft 34.

In this embodiment, the front bracket 11, the rear bracket 12, the lower push rod 131, the first sliding member 151, the second sliding member 131a, the first connecting member 162 and the second connecting member 172 are respectively arranged on the left and right sides of the cart frame, and the front lower enclosure bar 14, the rear lower enclosure bar 15, the front upper enclosure bar body 161, the rear upper enclosure bar body 171 and the upper push rod 132 all include side bars located on the left and right sides and a cross bar connected between one end of the side bars on the left and right sides.

In this way, a four-bar linkage is formed between the front bracket 11, the rear bracket 12, the front lower enclosure rod 14 and the rear lower enclosure rod 15, a four-bar linkage is also formed between the front bracket 11, the rear bracket 12, the front upper enclosure rod and the rear upper enclosure rod, a crank slider mechanism is formed between the lower push rod 131, the second sliding member 131a, the rear upper enclosure rod and the rear bracket 12, and a crank slider mechanism is also formed between the lower push rod 131, the first sliding member 151, the rear lower enclosure rod 15 and the rear bracket 12. In this way, when the push rod assembly 13 rotates as a whole, the front bracket 11, the rear bracket 12, the front lower enclosure rod 14, the rear lower enclosure rod 15, the front upper enclosure rod and the rear upper enclosure rod can be driven to rotate relatively through the above-mentioned two four-bar linkages and two crank slider mechanisms, thereby realizing the folding and unfolding operation of the child stroller.

The stroller frame further includes a tie rod assembly 18 , which is rotatably and slidably disposed at a middle portion of a crossbar of the front lower enclosure bar 14 .

The tie rod assembly 18 is a telescopic rod assembly that can be extended and retracted along the length extension direction thereof. Specifically, the tie rod assembly 18 includes a lower tie rod 181 and an upper tie rod 182 that can be slidably arranged on the lower tie rod 181 along the length extension direction of the lower tie rod 181. In this embodiment, the lower tie rod 181 has a lumen extending along the length direction thereof, and the upper tie rod 182 is partially located in the lumen of the lower tie rod 181 and can slide relative to the lower tie rod 181 in the direction of extending or retracting into the lumen.

Specifically, the cart frame further includes a third sliding member 141, which is rotatably disposed in the middle of the cross bar of the front lower enclosure rod 14, and the third sliding member 141 is slidably disposed on the lower pull rod 181 along the length extension direction of the lower pull rod 181. In this embodiment, the third sliding member 141 is sleeved in the middle of the cross bar of the front lower enclosure rod 14 and can be rotatably disposed around the cross bar of the front lower enclosure rod 14, and the third sliding member 141 has a sliding sleeve, which is sleeved on the lower pull rod 181 and can be slidably disposed along the length extension direction of the lower pull rod 181.

When the stroller frame is in the unfolded state, the front lower enclosure rod 14, the rear lower enclosure rod 15, the front upper enclosure rod body 161 and the rear upper enclosure rod body 171 all extend in the horizontal direction, the front lower enclosure rod 14 and the rear lower enclosure rod 15 are approximately in the same plane, the front upper enclosure rod body 161 and the rear upper enclosure rod body 171 are approximately in the same plane, the front upper enclosure rod is located above the front lower enclosure rod 14, and the rear upper enclosure rod is located above the rear lower enclosure rod 15. The front lower enclosure rod 14 is a U-shaped structure with an opening facing backwards, the rear lower enclosure rod 15 is a U-shaped structure with an opening facing forwards, the front lower enclosure rod 14 and the rear lower enclosure rod 15 are connected to form a closed frame structure, the front upper enclosure rod body 161 is a U-shaped structure with an opening facing backwards, the rear upper enclosure rod body 171 is a U-shaped structure with an opening facing forwards, and the front upper enclosure rod and the rear upper enclosure rod are connected to form a closed frame structure.

The stroller has a first use state and a second use state when the stroller frame is in an unfolded state. When the stroller is in the first use state, the rod assembly 18 is in a retracted state, that is, most of the upper rod 182 is retracted into the tube cavity of the lower rod 181, and the rod assembly 18 extends in the front-to-back direction and is located below the front lower enclosure rod 14. At this time, the stroller is used in the same way as an ordinary stroller. A person stands at the rear of the stroller and holds the cross bar of the upper push rod 132 to push the stroller forward, as shown in Figures 1 and 2.

When the stroller is in the second use state, the rod assembly 18 is in an extended state, that is, most of the upper rod 182 extends out of the tube cavity of the lower rod 181, and the rod assembly 18 extends in the up-down direction and is located in front of the cross bar of the front lower enclosure bar 14. At this time, the stroller can be used as a child trailer, and a person stands in front of the stroller and holds the upper part of the rod assembly 18 to pull the stroller forward, as shown in Figures 4 to 6.

When the stroller is converted from the first usage state to the second usage state, the pull rod assembly 18 as a whole slides forward a certain distance relative to the third sliding member 141; the third sliding member 141 drives the pull rod assembly 18 to rotate upward relative to the cross bar of the front lower enclosure rod 14 until the pull rod assembly 18 extends in the up and down direction; the upper pull rod 182 slides upward relative to the lower pull rod 181 and gradually extends out of the tubular cavity of the lower pull rod 181, thereby extending the pull rod assembly 18.

When the stroller is converted from the second usage state to the first usage state, the upper pull rod 182 slides downward relative to the lower pull rod 181 and retracts into the tubular cavity of the lower pull rod 181, thereby contracting the pull rod assembly 18; the pull rod assembly 18 drives the third sliding member 141 to rotate forward and downward relative to the cross bar of the front lower enclosure rod 14 as a whole until the pull rod assembly 18 extends in the horizontal direction; the pull rod assembly 18 slides backward relative to the third sliding member 141 as a whole until the pull rod assembly 18 is accommodated under the front lower enclosure rod 14.

When the baby stroller is folded in the first use state, the push rod assembly 13 can be directly operated to fold, specifically: the upper push rod 132 is operated to flip it forward and close to the lower push rod 131, as shown in Figures 8 and 9. The push rod assembly 13 is rotated backward and downward as a whole to be close to the rear bracket 12; when the push rod assembly 13 rotates, the first sliding member 151 slides upward and forward along the length extension direction of the rear lower enclosure rod 15, and the first sliding member 151 drives the rear lower enclosure rod 15 to rotate upward relative to the rear bracket 12, and the end portion of the front lower enclosure rod 14 rotatably connected to the rear lower enclosure rod 15 also moves upward, so that the front lower enclosure rod 14 rotates backward and approaches the rear lower enclosure rod 15, driving the front bracket 11 to rotate backward and approaches the rear bracket 12; when the push rod assembly 13 rotates, the second sliding member 131a is driven to slide in the lower direction of the lower push rod 131, so that the rear upper enclosure rod rotates downward and approaches the rear bracket 12, and drives the front upper enclosure rod to rotate downward and approaches the front bracket 11. The folding process is shown in Figures 10 and 11, until the various rods that make up the stroller frame are closely together, and finally folded as shown in Figures 12 and 13.

When the child stroller is folded in the second use state, the pull rod assembly 18 must be operated first to switch the child stroller to the first use state before folding.

During the folding process of the child stroller, when the upper push rod 132 flips forward and approaches the lower push rod 131, the push rod assembly 13 is driven to rotate backward and downward as a whole, so that other components constituting the stroller frame can be driven to rotate/slide automatically, thereby realizing the folding of the child stroller, making the folding operation of the child stroller convenient. Moreover, after the child stroller is folded, the structure is compact and the volume is small, so it is easy to carry and store.

The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A child stroller, comprising a stroller frame having an unfolded state and a folded state, characterized in that the stroller frame comprises: A front bracket, a front wheel assembly being mounted at a lower portion of the front bracket; A rear support, a rear wheel assembly is mounted on the lower portion of the rear support, and the upper portion of the front support is rotatably connected to the upper portion of the rear support; A push rod assembly, the push rod assembly is rotatably connected to the rear bracket; A front lower enclosure rod, the front portion of which is rotatably connected to the lower portion of the front bracket; A rear lower enclosure rod, wherein the front portion of the rear lower enclosure rod is rotatably connected to the rear portion of the front lower enclosure rod, the rear portion of the rear lower enclosure rod is rotatably connected to the lower portion of the rear bracket, and the lower portion of the push rod assembly is rotatably and slidably disposed on the rear lower enclosure rod; A front upper enclosure rod, the rear portion of which is rotatably connected to the upper portion of the front bracket via a first shaft; A rear upper enclosure rod, wherein the front portion of the rear upper enclosure rod is rotatably connected to the upper portion of the rear bracket via a second shaft, the front portion of the rear upper enclosure rod is rotatably connected to the rear portion of the front upper enclosure rod via a third shaft, and the rear portion of the rear upper enclosure rod is rotatably and slidably disposed on the push rod assembly; The front upper enclosure bar includes a front upper enclosure bar body and a first connecting member fixedly arranged at the rear of the front upper enclosure bar body, and the rear upper enclosure bar includes a rear upper enclosure bar body and a second connecting member fixedly arranged in front of the rear upper enclosure bar body. When the cart frame is in an unfolded state, the first connecting member extends obliquely downward from front to rear, and the second connecting member extends obliquely downward from rear to front, and the rear end portion of the first connecting member is rotatably connected to the front end portion of the second connecting member via the third axis. 2. The stroller according to claim 1, wherein when the stroller frame is in an unfolded state, the third axis is located between the first axis and the second axis in the front-to-back direction. 3. The stroller according to claim 1, characterized in that: when the stroller frame is in the unfolded state, the third axis is located below the first axis and the second axis, and/or the third axis is located below the rotation connection point between the front bracket and the rear bracket. 4. The stroller according to claim 1 is characterized in that: the stroller frame also includes a first sliding member that can be slidably arranged on the rear lower enclosure rod along the front-to-back direction, and the lower part of the push rod assembly is rotatably connected to the first sliding member. 5. The stroller according to claim 1 is characterized in that: the stroller frame also includes a second sliding member that can be slidably arranged on the push rod assembly along the length extension direction of the push rod assembly, and the rear portion of the rear upper enclosure rod is rotatably connected to the second sliding member. 6. The child stroller according to any one of claims 1 to 5, characterized in that the stroller frame further comprises a pull rod assembly, and the pull rod assembly is rotatably and slidably arranged on the front lower enclosure rod. 7. The stroller according to claim 6 is characterized in that: the stroller has a first usage state and a second usage state, when the stroller is in the first usage state, the pull rod assembly extends in the front-to-back direction, and the pull rod assembly is located below the front lower enclosure rod, when the stroller is in the second usage state, the pull rod assembly extends in the up-down direction, and the pull rod assembly is located in front of the front lower enclosure rod. 8. The stroller according to claim 7 is characterized in that the pull rod assembly is a telescopic rod assembly that can be extended and retracted along its length direction, and when the stroller is in a first use state, the pull rod assembly is in a retracted state, and when the stroller is in a second use state, the pull rod assembly is in an extended state. 9. The stroller according to claim 6 is characterized in that: the stroller frame also includes a third sliding member, the third sliding member is rotatably arranged at the front part of the front lower enclosure rod, and the third sliding member can be slidably arranged on the pull rod assembly along the length extension direction of the pull rod assembly.