CN107985378B - Strollers - Google Patents

Abstract

The invention discloses a child stroller, comprising a stroller frame with unfolding and folding states, the stroller frame comprising a front bracket, a rear bracket, a push rod assembly, a strut and a connecting piece, the connecting piece is fixedly connected to one of the three components of the front bracket, the rear bracket and the push rod assembly, and is rotatably connected to the other two components, the strut is rotatably connected to the push rod assembly and the rear bracket respectively, when the child stroller is in a folding state, the three components of the front bracket, the rear bracket and the push rod assembly are in the same plane; or, two of the three components of the front bracket, the rear bracket and the push rod assembly are in the same plane, and the plane where the third component is located is parallel to the plane where two of the three components are located. The child stroller has a simple structure, is easy to unfold and fold, and is flat after being folded, has a compact structure, a small size, and is easy to carry and store.

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 technique

A child stroller in the prior art includes a stroller frame having an unfolded position and a folded position, a front wheel assembly and a rear wheel assembly arranged at the bottom of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state. There are many types of existing child strollers, and the number of stroller frame rods is different, and the connection positions between the rods are different, so the folding principle, folding method and folded effect are different.

Summary of the invention

The object of the present invention is to provide an improved baby stroller in view of the deficiencies in the prior art.

In order to achieve the above object, the technical solution adopted by the present invention is:

The stroller according to claim 1, wherein the front wheel assembly is arranged at the bottom front part of the stroller frame, the rear wheel assembly is arranged at the bottom rear part of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state. The stroller frame comprises a front bracket, a rear bracket, a push rod assembly, a strut and a connecting piece. The front bracket is used to mount the front wheel assembly, and the rear bracket is used to mount the rear wheel assembly. The connecting piece is fixedly connected to one of the three components of the front bracket, the rear bracket and the push rod assembly, and is rotatably connected to the other two components. The strut is rotatably connected to the push rod assembly and the rear bracket respectively. When the stroller is in the folded state, the front bracket, the rear bracket and the push rod assembly are in the same plane; or, two of the three components of the front bracket, the rear bracket and the push rod assembly are in the same plane, and the plane where the third component is located is parallel to the plane where two of the three components are located.

Preferably, the front bracket includes a first cross bar connected to the connecting member, the rear bracket includes a second cross bar connected to the connecting member, and the push rod assembly includes a third cross bar connected to the connecting member, and the first cross bar, the second cross bar and the third cross bar are arranged in parallel.

Preferably, when the stroller is in a folded state, the front bracket is accommodated inside the rear bracket, the front bracket and the rear bracket are located in the same plane, and the plane where the push rod assembly is located is parallel to the plane where the front bracket and the rear bracket are located; or, the front bracket is accommodated inside the rear bracket, the rear bracket is accommodated inside the push rod assembly, and the front bracket, the rear bracket and the push rod assembly are located in the same plane.

Preferably, the front wheel assembly is rotatably disposed at the bottom of the front bracket, and the rear wheel assembly is rotatably disposed at the bottom of the rear bracket. The child stroller also includes a driving mechanism, which is respectively disposed between the front bracket and the front wheel assembly, and between the rear bracket and the rear wheel assembly. When the stroller frame is folded, the rods constituting the stroller frame are flipped, driving the front wheel assembly and the rear wheel assembly to rotate toward the inside of the stroller frame, respectively.

Furthermore, the front wheel assembly includes a front wheel joint rotatably arranged at the bottom of the front bracket and a front wheel rotatably arranged on the front wheel joint through a front wheel axle, and the rear wheel assembly includes a rear wheel joint rotatably arranged at the bottom of the rear bracket and a rear wheel rotatably arranged on the rear wheel joint through a rear wheel axle. When the stroller is in an unfolded state, the axis lines of the front wheel axle and the rear wheel axle both extend in the left-right direction, and when the stroller is in a folded state, the axis lines of the front wheel axle and the rear wheel axle both extend in the front-back direction.

Furthermore, the driving mechanism includes a connecting shaft that can be rotatably arranged on the front bracket and the rear bracket, a sliding member that can be slidably arranged on the connecting shaft, and a traction cable. The front wheel assembly is fixedly connected to the connecting shaft, and the sliding member cooperates with the connecting shaft. One end of the traction cable is fixedly connected to the sliding member, and the other end of the traction cable is respectively fixedly connected to the components rotatably connected to the front bracket/the rear bracket. When the cart frame is folded, the traction cable is tightened, and the traction cable pulls the sliding member to slide, and the connecting shaft is driven to rotate relative to the front bracket and the rear bracket respectively through the cooperation of the sliding member and the connecting shaft, thereby driving the front wheel assembly and the rear wheel assembly to flip toward the inner side of the cart frame respectively.

Furthermore, the driving mechanism includes a universal flexible shaft which can be rotatably arranged in the front bracket and the rear bracket respectively, one end of the universal flexible shaft is fixedly connected to the front wheel assembly and the rear wheel assembly respectively, and the other end of the universal flexible shaft is fixedly connected to a component rotatably connected to the front bracket/the rear bracket. When the cart frame is folded, the universal flexible shaft is driven to rotate relative to the front bracket and the rear bracket respectively, driving the front wheel assembly and the rear wheel assembly to flip toward the inner side of the cart frame respectively.

Preferably, the stroller frame further comprises a seat rod and a swinging member, wherein the swinging member is rotatably disposed on the push rod assembly, and the seat rod is rotatably connected to the swinging member and the support rod, respectively.

Preferably, the stroller further comprises an unlocking mechanism for unlocking the locking mechanism, and a handle is provided on the connecting member, and the handle is connected to the unlocking mechanism. When the handle is lifted upward, the locking mechanism is unlocked by the unlocking mechanism, and the stroller can be folded.

Preferably, the connecting member is fixedly connected to the front bracket.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the child stroller of the present invention has a simple structure and is easy to unfold and fold. The folded child stroller is flat, compact, small in size, and easy to carry and store.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of the baby stroller of the present invention in an unfolded state;

FIG2 is a side view of the baby stroller of the present invention in the unfolded state;

FIG3 is a schematic diagram of the structure of the driving mechanism of the front wheel assembly of the present invention (Example 1);

FIG4 is a schematic diagram of the structure of the driving mechanism of the rear wheel assembly of the present invention (Example 1);

Figure 5 is a schematic diagram of the structure of the driving mechanism of the front wheel assembly of the present invention (Example 2);

FIG6 is a schematic diagram of the structure of the driving mechanism of the rear wheel assembly of the present invention (Example 2);

FIG. 7 is a perspective view of the child stroller of the present invention during the folding process;

FIG8 is a perspective view of the child stroller of the present invention in a folded state;

FIG. 9 is a side view of the baby stroller of the present invention in a folded state.

Among them: 1. cart frame; 11. front bracket; 111. front support rod; 112. first cross bar; 12. rear bracket; 121. rear support rod; 122. second cross bar; 13. push rod assembly; 131. lower push rod; 131a. lower push rod support rod; 131b. third cross bar; 132. upper push rod; 132a. upper push rod support rod; 132b. fourth cross bar; 14. support rod; 15. connecting piece; 16. seat rod; 17. swing piece; 21. front wheel joint; 22. front wheel; 23. front wheel axle; 31. rear wheel joint; 32. rear wheel; 33. rear wheel axle; 41. connecting shaft; 411. guide groove; 42. sliding piece; 421. guide column; 43. traction rope; 51. universal flexible shaft.

Detailed ways

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 , 2 , 7 to 9 , the child stroller of the present invention comprises a stroller frame 1 having unfolded and folded states, a front wheel assembly arranged at the bottom front portion of the stroller frame 1, a rear wheel assembly arranged at the bottom rear portion of the stroller frame 1, and a locking mechanism for locking the stroller frame 1 in the unfolded state.

The stroller frame 1 includes a front bracket 11, a rear bracket 12, a push rod assembly 13, a support rod 14 and a connecting member 15. The front wheel assembly is arranged at the bottom of the front bracket 11, and the rear wheel assembly is arranged at the bottom of the rear bracket 12. The connecting member 15 is fixedly connected to one of the three components of the front bracket 11, the rear bracket 12 and the push rod assembly 13, and is rotatably connected to the other two components. The support rod 14 is rotatably connected to the push rod assembly 13 and the rear bracket 12 respectively. When the stroller frame 1 is in a folded state, the three components of the front bracket 11, the rear bracket 12 and the push rod assembly 13 are in the same plane; or, two of the three components of the front bracket 11, the rear bracket 12 and the push rod assembly 13 are in the same plane, and the plane where the third component is located is parallel to the plane where two of the three components are located. In this way, the child stroller can be flat after folding, with a compact structure and a small volume. In this embodiment, the connecting member 15 is fixedly connected to the front bracket 11, and the connecting member 15 is rotatably connected to the rear bracket 12 and the push rod assembly 13 respectively.

The stroller frame also includes a seat rod 16 and a swinging member 17. The swinging member 17 is rotatably disposed on the push rod assembly 13. The seat rod 16 is rotatably connected to the swinging member 17 and the support rod 14. The seat rod 16 is provided with a cloth cover so that the child can sit on it. Of course, the child stroller can also be provided with a socket for installing a child seat bag on the stroller frame 1 without the seat rod 16 and the swinging member 17, so that the child seat bag can be connected to the stroller frame 1 through the socket for the child to sit on.

The push rod assembly 13 includes a lower push rod 131 and an upper push rod 132 which is slidably disposed on the lower push rod 131 along the length extension direction of the lower push rod 131, and the lower portion of the lower push rod 131 is rotatably connected to the upper portion of the front bracket 11. In this way, when the child stroller is folded, the upper push rod 132 can slide downward relative to the lower push rod 131 and close to the lower push rod 131, so that the volume of the child stroller after folding is smaller.

The front bracket 11 includes a front support rod 111 located at the left and right sides of the cart frame 1 and a first cross bar 112 fixedly connected to the front support rod 111 at both ends, and the first cross bar 112 is connected to the front support rod 111 at both ends to form a U-shaped structure with an opening facing forward and downward. The rear bracket 12 includes a rear support rod 121 located at the left and right sides of the cart frame 1 and a second cross bar 122 fixedly connected to the rear support rod 121 at both ends, and the second cross bar 122 is connected to the rear support rod 121 at both ends to form a U-shaped structure with an opening facing backward and downward. The lower push rod 131 includes a lower push rod support rod 131a located at the left and right sides of the cart frame 1 and a third cross bar 131b fixedly connected to the lower push rod support rod 131a at both ends, and the third cross bar 131b is connected to the lower push rod support rod 131a at both ends to form a U-shaped structure with an opening facing upward and backward. The upper push rod 132 includes upper push rod support rods 132a respectively located on the left and right sides of the cart frame 1 and a fourth cross bar 132b fixedly connected to the upper push rod support rods 132a on the left and right sides respectively at both ends. The fourth cross bar 132b is connected to the upper push rod support rods 132a on both sides to form a U-shaped structure with an opening facing downward and forward. The U-shaped structure of the lower push rod 131 is connected to the U-shaped structure of the upper push rod 132 so that the push rod assembly 13 forms a closed frame structure. The swing member 17 can be rotatably mounted on the third cross bar 131b, and the support rod 14 is rotatably connected to the lower push rod support rod 131a.

The first cross bar 112, the second cross bar 122 and the third cross bar 131b are arranged in parallel, and the first cross bar 112, the second cross bar 122 and the third cross bar 131b are respectively connected to the connecting member 15. Specifically, in this embodiment, the connecting member 15 is provided with a first axial hole, a second axial hole and a third axial hole, when the child stroller is in the unfolded state, the second axial hole is located above the first axial hole, the third axial hole is located behind the second axial hole, the first cross bar 112 is inserted into the first axial hole, and the first cross bar 112 is relatively fixed to the connecting member 15, the second cross bar 122 is rotatably inserted into the second axial hole, and the third cross bar 131b is rotatably inserted into the third axial hole.

The front wheel assembly includes a front wheel joint 21 and a front wheel 22. The front wheel joint 21 is rotatably disposed at the bottom of the front bracket 11, and the front wheel 22 is rotatably disposed on the front wheel joint 21 through a front wheel axle 23. The rear wheel assembly includes a rear wheel joint 31 and a rear wheel 32. The rear wheel joint 31 is rotatably disposed at the bottom of the rear bracket 12, and the rear wheel 32 is rotatably disposed on the rear wheel joint 31 through a rear wheel axle 33.

The stroller also includes a driving mechanism, which is respectively arranged between the front bracket 11 and the front wheel assembly, and between the rear bracket 12 and the rear wheel assembly. When the stroller frame 1 is folded, the driving mechanism can drive the front wheel assembly and the rear wheel assembly to flip toward the inside of the stroller frame 1, so that the folded stroller is flat, compact and small in size.

The following are two specific embodiments of the driving mechanism:

Example 1

As shown in Fig. 3 and Fig. 4, the driving mechanism comprises a connecting shaft 41 which can be rotatably arranged on the front bracket 11 and the rear bracket 12, a sliding member 42 which can be slidably arranged on the connecting shaft 41, and a traction rope 43. The connecting shaft 41 is fixedly connected to the front wheel joint 21 and the rear wheel joint 31 respectively, and the connecting shaft 41 cooperates with the sliding member 42. One end of the traction rope 43 is fixedly connected to the sliding member 42, and the other end of the traction rope 43 is fixedly connected to the component which is rotatably connected to the front bracket 11/the rear bracket 12. When the cart frame 1 is folded, the traction rope 43 is tightened, and the traction rope 43 pulls the sliding member 42 to slide on the connecting shaft 41. The connecting shaft 41 rotates through the cooperation with the sliding member 42, thereby driving the front wheel assembly and the rear wheel assembly to rotate synchronously with the connecting shaft 41 and flip toward the inner side of the cart frame 1.

In this embodiment, the front bracket 11, the rear bracket 12 and the connecting shaft 41 all have lumens, the connecting shaft 41 is respectively located in the lumens of the front bracket 11 and the rear bracket 12, the sliding member 42 is located in the lumens of the connecting shaft 41, and the inner profile of the connecting shaft 41 is matched with the sliding member 42 through a spiral inclined surface. The other end of the traction rope 43 located in the front bracket 11 is fixedly connected to the rear bracket 12, and the other end of the traction rope 43 located in the rear bracket 12 is fixedly connected to the front bracket 11.

The rotation drive mechanism in this embodiment also includes a guide structure for providing guidance when the sliding member 42 slides relative to the connecting shaft 41. Specifically, the guide structure includes a guide groove 411 provided on one of the connecting shaft 41 or the sliding member 42, and a guide column 421 matching the guide groove is provided on the other of the connecting shaft 41 or the sliding member 42. The guide column 421 penetrates the guide groove 411 and can be slidably arranged along the length extension direction of the guide groove 411.

The driving mechanism further includes an elastic member (not shown in the figure) for driving the sliding member 42 to slide in the opposite direction when the stroller is unfolded, so as to reversely rotate the connecting shaft 41 and reversely rotate the front wheel assembly and the rear wheel assembly to the use state. In this embodiment, the elastic member is a tension spring, one end of which is fixedly arranged on the sliding member 42, and the other end of which is respectively fixedly arranged on the front wheel joint 21 and the rear wheel joint 31.

Example 2

As shown in Fig. 5 and Fig. 6, the driving mechanism includes a universal flexible shaft 51 which can be rotatably arranged on the front bracket 11 and the rear bracket 12, one end of the universal flexible shaft 51 is fixedly connected to the front wheel joint 21 and the rear wheel joint 31, respectively, and the other end of the universal flexible shaft 51 is fixedly connected to the components rotatably connected to the front bracket 11/the rear bracket 12. When the universal flexible shaft 51 is rotated when the cart frame 1 is folded, the front wheel assembly and the rear wheel assembly are turned toward the inner side of the cart frame 1 by synchronously rotating with the universal flexible shaft 51.

In this embodiment, when the stroller is unfolded, the components rotatably connected to the front bracket 11/rear bracket 12 rotate in the opposite direction, driving the universal flexible shaft 51 to rotate in the opposite direction, so that the front wheel assembly and the rear wheel assembly rotate synchronously with the universal flexible shaft 51 to be in use.

In this embodiment, the front bracket 11 and the rear bracket 12 both have a tubular cavity, and the universal flexible shaft 51 is respectively located in the tubular cavities of the front bracket 11 and the rear bracket 12, the other end of the universal flexible shaft 51 located in the front bracket 11 is fixedly connected to the rear bracket 12, and the other end of the universal flexible shaft 51 located in the rear bracket 12 is fixedly connected to the front bracket 11.

The locking mechanism includes a first locking mechanism for locking the relative position of the upper push rod 132 and the lower push rod 131 and a second locking mechanism for locking the position of any two parts connected by rotation among the front bracket 11, the rear bracket 12, the lower push rod 131, the support rod 14, the connecting member 15, the seat rod 16 and the swing member 17. The child stroller also includes a first unlocking mechanism for unlocking the first locking mechanism and a second unlocking mechanism for unlocking the second locking mechanism. A handle is provided on the connecting member 15, and the handle is connected to the second unlocking mechanism. When the handle is lifted upward, the second locking mechanism can be unlocked, and the stroller frame 1 can be folded, so that it can be folded by lifting. The specific structures of the first locking mechanism, the second locking mechanism, the first unlocking mechanism and the second unlocking mechanism are not the technical points to be protected by this patent, and the structures in the prior art can be adopted.

When the baby stroller is in the unfolded state, the first locking mechanism and the second locking mechanism are both in the locked state, and the axis lines of the front wheel axle 23 and the rear wheel axle 33 both extend in the left-right direction, as shown in FIGS. 1 and 2 .

When the stroller is folded, the first unlocking mechanism is first operated to unlock the first locking mechanism, so that the upper push rod 132 slides downward and retracts into the tube cavity of the lower push rod 131; then the hand is lifted upward to unlock the second locking mechanism, and the push rod assembly 13 is turned downward under the action of its own gravity, and the rear bracket 12 is driven to turn forward and approach the front bracket 11 through the support rod 14, and the front bracket 11 is turned backward and approaches the rear bracket 12 until the front bracket 11 is accommodated in the rear bracket 12, and the front bracket 11 and the rear bracket 12 are located in the same plane, and the plane where the push rod assembly 13 is located is parallel to the plane where the front bracket 11 and the rear bracket 12 are located; when the front bracket 11 and the rear bracket 12 are turned over and approached, the connecting shaft 41 or the universal flexible shaft 51 located in the front bracket 11 and the rear bracket 12 is driven by the driving mechanism to rotate, so that the front wheel assembly and the rear wheel assembly are respectively rotated synchronously with the connecting shaft 41 or the universal flexible shaft 51, so that the front wheel assembly and the rear wheel assembly are both turned over to the inner side of the stroller frame 1, as shown in Figure 7, and finally folded as shown in Figures 8 and 9. When the stroller is in a folded state, the axis lines of the front wheel axle 23 and the rear wheel axle 33 extend in the front-rear direction, and the front wheel 22 is located above the rear wheel 32. The folded stroller is flat, compact, small, and 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 stroller for children, comprising a stroller frame with unfolded and folded states, a front wheel assembly arranged at a bottom front portion of the stroller frame, a rear wheel assembly arranged at a bottom rear portion of the stroller frame, and a locking mechanism for locking the stroller frame in the unfolded state, characterized in that the stroller frame comprises a front bracket, a rear bracket, a push rod assembly, a strut and a connecting piece, the front bracket being used to mount the front wheel assembly, the rear bracket being used to mount the rear wheel assembly, the connecting piece being fixedly connected to the front bracket, the rear bracket and the push rod assembly being rotatably connected to the connecting piece respectively, and the strut being rotatably connected to the push rod assembly and the rear bracket respectively, and when the stroller is in the folded state, the front bracket, the rear bracket and the push rod assembly are in the same plane; or, two of the three components of the front bracket, the rear bracket and the push rod assembly are in the same plane, and the plane where the third component is located is parallel to the plane where two of the three components are located. 2. The stroller according to claim 1, characterized in that: the front support includes a first cross bar connected to the connecting member, the rear support includes a second cross bar connected to the connecting member, the push rod assembly includes a third cross bar connected to the connecting member, and the first cross bar, the second cross bar and the third cross bar are arranged in parallel. 3. The stroller according to claim 1 is characterized in that: when the stroller is in a folded state, the front bracket is accommodated inside the rear bracket, the front bracket and the rear bracket are located in the same plane, and the plane where the push rod assembly is located is parallel to the plane where the front bracket and the rear bracket are located; or, the front bracket is accommodated inside the rear bracket, the rear bracket is accommodated inside the push rod assembly, and the front bracket, the rear bracket and the push rod assembly are located in the same plane. 4. The stroller according to any one of claims 1 to 3, characterized in that: the front wheel assembly is rotatably arranged at the bottom of the front bracket, the rear wheel assembly is rotatably arranged at the bottom of the rear bracket, and the stroller further comprises a driving mechanism, which is respectively arranged between the front bracket and the front wheel assembly, and between the rear bracket and the rear wheel assembly, and when the stroller frame is folded, the rods constituting the stroller frame are flipped to drive the front wheel assembly and the rear wheel assembly to rotate toward the inner side of the stroller frame respectively. 5. The stroller according to claim 4 is characterized in that: the front wheel assembly includes a front wheel joint rotatably arranged at the bottom of the front bracket and a front wheel rotatably arranged on the front wheel joint through a front wheel axle, the rear wheel assembly includes a rear wheel joint rotatably arranged at the bottom of the rear bracket and a rear wheel rotatably arranged on the rear wheel joint through a rear wheel axle, when the stroller is in an unfolded state, the axis lines of the front wheel axle and the rear wheel axle both extend in the left-right direction, and when the stroller is in a folded state, the axis lines of the front wheel axle and the rear wheel axle both extend in the front-back direction. 6. The stroller according to claim 4, characterized in that: the driving mechanism comprises a connecting shaft which can be rotatably arranged on the front bracket and the rear bracket respectively, a sliding member which can be slidably arranged on the connecting shaft, and a traction cable, the front wheel assembly is fixedly connected to the connecting shaft, the sliding member cooperates with the connecting shaft, one end of the traction cable is fixedly connected to the sliding member, and the other end of the traction cable is respectively fixedly connected to the components rotatably connected to the front bracket/the rear bracket. When the stroller frame is folded, the traction cable is tightened, and the traction cable pulls the sliding member to slide, and the connecting shaft is driven to rotate relative to the front bracket and the rear bracket respectively through the cooperation of the sliding member and the connecting shaft, thereby driving the front wheel assembly and the rear wheel assembly to flip toward the inner side of the stroller frame respectively. 7. The stroller according to claim 4 is characterized in that: the driving mechanism includes a universal flexible shaft that can be rotatably arranged in the front bracket and the rear bracket respectively, one end of the universal flexible shaft is fixedly connected to the front wheel assembly and the rear wheel assembly respectively, and the other end of the universal flexible shaft is fixedly connected to the components rotatably connected to the front bracket/the rear bracket respectively, when the stroller frame is folded, the universal flexible shaft is driven to rotate relative to the front bracket and the rear bracket respectively, driving the front wheel assembly and the rear wheel assembly to flip toward the inner side of the stroller frame respectively. 8. The stroller according to claim 1, characterized in that: the stroller frame also includes a seat rod and a swing member, the swing member is rotatably disposed on the push rod assembly, and the seat rod is rotatably connected to the swing member and the support rod respectively. 9. The stroller according to claim 1 is characterized in that: the stroller also includes an unlocking mechanism for unlocking the locking mechanism, a handle is provided on the connecting member, and the handle is connected to the unlocking mechanism, when the handle is lifted upward, the locking mechanism is unlocked by the unlocking mechanism, and the stroller can be folded.