CN108583669B - Bidirectional folding cart - Google Patents

Abstract

The invention discloses a two-way folding stroller. The stroller frame includes side brackets arranged on the left and right sides and a transverse brace assembly arranged between the side brackets on both sides. The side brackets on each side include a bottom rod, a front A connecting rod, a rear stay, an inclined stay, a push rod and a seat post assembly, wherein the bottom rod includes a front rod and a rear rod that each extend in the front and rear direction and slide and telescope relative to the front and rear direction. When folding the stroller frame, you only need to turn the push rod to drive the bottom rod, front link, rear support rod, diagonal support rod, push rod and seat rod components to move relative to each other and fold the side brackets on both sides. At the same time, it gradually folds in the left and right directions to realize the folding of the stroller frame in three directions: up and down, front and rear, and left and right. Its structure is simple and reliable, and its operation is very convenient. It can be folded quickly. After folding, the stroller is compact and easy to store and carry.

Description

Two-way folding stroller

Technical field

The invention relates to a two-way folding stroller.

Background technique

Most of the existing carts on the market have a relatively large folding volume, which is not conducive to storage and transportation. Even if there are a few carts with small folding volumes, the folding operation is relatively cumbersome and usually requires multiple steps to achieve complete folding. Therefore, we need a stroller that has a small folding volume and is easy to fold.

Contents of the invention

The object of the present invention is to provide a two-way folding stroller with easy folding operation, flat structure and small volume after folding.

In order to achieve the above object, the technical solution adopted by the present invention is: a two-way folding cart, which includes a cart frame with an unfolded state and a folded state, a wheel assembly provided at the bottom of the cart frame, and a wheel assembly for folding the cart frame. The locking mechanism of the stroller frame is locked in the unfolded state. The stroller frame includes two side brackets arranged on the left and right sides and a side bracket that is arranged between the side brackets on both sides and can be folded laterally. The cross brace assembly, the side brace on each side includes a bottom bar, a front link, a rear brace, a diagonal brace, a push rod and a seat post assembly,

The bottom rod includes a front rod and a rear rod that each extend in the front-rear direction and slide and telescope relatively in the front-rear direction. The front link extends upwardly from front to back. The lower part of the front link is connected to the front part of the front link. The upper part of the front link and the lower part of the push rod are pivotally connected through the second axis; the rear support rod extends in the up and down direction, and the lower part of the rear support rod It is pivotally connected to the rear rod through a third axis. The upper part of the rear support rod is pivotally connected to the lower part of the push rod through a fourth axis. The axis line of the second axis and the fourth axis arranged parallel to each other; the diagonal struts extend in the front-rear direction, and the front part of the diagonal struts is pivotally connected to the lower part of the front link through a fifth axis or is pivotally connected to the front part of the front rod. on, the rear part of the diagonal support rod is pivotally connected to the rear support rod through a sixth axis, the axis lines of the first axis and the fifth axis extend parallel or collinear to each other, and the seat post assembly It includes a seat post extending in the front and rear direction and a sliding member pivotally connected to the rear support rod. The front portion of the seat post is pivotally connected to the front link. The extension direction is slidably provided on the seat post; the cross brace component includes a bottom brace component between the bottom bars on both sides, and a lower part of the front link and the upper stay assembly between the rear of the seat post.

Preferably, the bottom strut assembly includes two bottom struts arranged crosswise and pivotally connected at the intersection. The bottom struts extend in the front-to-back direction, and the front part of the bottom strut is rotatably connected to a The front part of the rear rod on one side and the rear part of the bottom support rod are rotationally connected to the rear part of the front rod on the other side.

Preferably, the upper strut assembly includes two upper struts that are arranged to cross each other and are pivotally connected at the intersection. The upper struts are arranged to extend upwardly from front to back, and the front part of the upper strut rotates. Ground is connected to the lower part of the front link or the lower part of the diagonal stay on one side, and the rear part of the upper stay is rotationally connected to the rear part of the seat post on the other side.

Further preferably, the front part of the upper strut is pivotally connected to a front connecting piece through a front connecting shaft, and the front connecting piece is connected to the front link or the oblique link through the first axis/fifth axis. The support rods are pivotally connected, the axis lines of the first shaft and the fifth shaft are arranged in line, and the axis lines of the front connecting shaft and the axis lines of the first shaft are arranged perpendicularly to each other. .

As a specific implementation, the rear part of the upper stay is connected to the rear part of the seat post through a rear connecting part, and the rear connecting part is located behind the sliding part on the seat post.

Preferably, the rear rod is provided with a chute extending along its length direction and opening downward, and the rear portion of the front rod is inserted into the chute in a sliding fit.

Preferably, the front part of the seat post is pivotally connected to the front link through a seventh axis, and the slider is pivotally connected to the rear stay through an eighth axis, and the seventh axis is at The front link is located between the first axle and the second axle, and the eighth axis is located on the rear strut between the fourth axle and the sixth axle.

Preferably, the wheel assembly has two groups located on the left and right sides, and each group of the wheel assembly includes a front wheel assembly located at the front of the front pole bottom and a rear wheel assembly located at the rear of the rear pole bottom. Wheel assembly, when the stroller frame is in a folded state, the two sets of front wheel assemblies and rear wheel assemblies are supported on the ground together.

Preferably, the push rod includes an upper push rod and a lower push rod that are folded relatively along the length direction, and a push rod locking member for locking the upper push rod and the lower push rod. The rod is connected to the front connecting rod and the rear support rod.

Further preferably, the locking mechanism includes a locking joint provided between the upper part of the front link and the lower part of the lower push rod for locking the two. After the push rod locking member is unlocked, the upper push rod When the rod is folded relative to the lower push rod, the locking joint is unlocked in a coordinated manner.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the bidirectional folding stroller of the present invention only needs to rotate the push rod when folding to drive the bottom rod, front link, rear support rod, and inclined push rod. The relative movement between the stay rod, push rod and seat rod components causes the side brackets on both sides to gradually fold in the left and right directions at the same time, realizing the folding of the stroller frame in the up and down, front and rear and left and right directions. Its structure is simple and reliable. It is very convenient to operate and can be folded quickly. After folding, the stroller is compact and easy to store and carry.

Description of drawings

Figure 1 is a perspective view of the folding stroller of the present invention in an unfolded state;

Figure 2 is a second perspective view of the folding stroller of the present invention in an unfolded state;

Figure 3 is a side view of the folding stroller of the present invention in an unfolded state;

Figure 4 is a schematic side view of the folding stroller of the present invention in use after the seat bag cover is installed;

Figure 5 is a side view of the folding stroller of the present invention after the push rod is folded;

Figure 6 is a side view of the folding stroller of the present invention in a semi-folded state;

Figure 7 is an isometric view of the folding stroller of the present invention in a semi-folded state;

Figure 8 is a side view of the folding stroller of the present invention in a folded state;

Figure 9 is a top view of the folding stroller of the present invention in a folded state;

Among them: 10. Side bracket; 20. Front wheel assembly; 30. Rear wheel assembly; 40. Seat cover;

1. Bottom rod; 11. Front rod; 12. Rear rod; 2. Front connecting rod; 3. Back brace; 4. Diagonal brace; 5. Push rod; 51. Lower push rod; 52. Upper push rod; 53. Push rod locking piece; 6. Seat post assembly; 61. Seat post; 62. Slider (sliding sleeve); 7. Bottom stay assembly; 71. Bottom stay assembly; 8. Upper stay assembly; 81. Upper Support rod; 82. Front connecting shaft; 83. Front connecting piece; 84. Rear connecting piece; 9. Locking joint;

101. First axis; 102. Second axis; 103. Third axis; 104. Fourth axis; 105. Fifth axis; 106. Sixth axis; 107. Seventh axis; 108. Eighth axis.

Detailed ways

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Referring to the two-way folding stroller shown in Figures 1 to 9, it includes a stroller frame with an unfolded state and a folded state, a wheel assembly located at the bottom of the stroller frame, and a wheel assembly for locking the stroller frame in the unfolded state. The stroller frame includes two side brackets 10 on the left and right sides, and a cross brace assembly that is disposed between the side brackets 10 on both sides and can be folded laterally.

Referring to FIGS. 1 to 4 , the side bracket 10 on each side includes a bottom rod 1 , a front link 2 , a rear stay 3 , a diagonal stay 4 , a push rod 5 and a seat post assembly 6 . The bottom pole 1 includes a front pole 11 and a rear pole 12 that each extend along the front and rear directions and can slide and telescope relatively along the front and rear directions. Here, specifically, the rear pole 12 is provided with a chute that extends along its length direction and opens downward. , the rear part of the front rod 11 is inserted into the above-mentioned chute in a sliding fit.

The front link 2 extends upward from front to back. The lower part of the front link 2 and the front part of the front lever 11 are pivotally connected through the first axis 101. The upper part of the front link 2 and the lower part of the push rod 5 are connected through the second axis. 102 is pivotally connected; the lower part of the rear support rod 3 is pivotally connected to the rear rod 12 through the third axis 103, and the upper part of the rear support rod 3 is pivotally connected to the lower part of the push rod 5 through the fourth axis 104. The above-mentioned third axis The axis lines of the four axes 104 and the second axle 102 are arranged parallel to each other; the front part of the diagonal support rod 4 is pivotally connected to the lower part of the front link 2 through the fifth axis 105 or is pivotally connected to the front part of the front rod 11 On the top, the rear part of the diagonal brace 4 is pivotally connected to the rear brace 3 through the sixth axis 106. The axis lines of the first axis 101 and the fifth axis 105 extend parallel to or collinearly with each other. In this embodiment , the first axis 101 and the fifth axis 105 are coaxially arranged.

The seat post assembly 6 includes a seat post 61 extending in the front-rear direction and a sliding member 62 pivotally connected to the rear stay 3. The front part of the seat post 61 is pivotally connected to the front link 2 through a seventh axis 107. The component 62 used here is a sliding sleeve that is slidably sleeved on the seat post 61. The sliding sleeve 62 pivots through the eighth axis 108 and is connected to the rear support rod 3. The seventh axis 107 is on the front link 2. The eighth axis 108 is located between the fourth axis 104 and the sixth axis 106 on the rear support rod 3 . A seat cover 40 can be provided above the seat post 61 and between the push rods 5 on both sides, so that the seat cover 40 and the seat post assembly 6 together form a seating mechanism for children to sit on the stroller frame, as shown in Figure 4 shown.

Referring to Figures 1 to 4, in this embodiment, the push rod 5 includes a lower push rod 51 and an upper push rod 52 that are folded relatively along the length direction, and are used to lock the upper push rod 52 and the lower push rod 51. The push rod locking piece 53, the push rod 5 is pivotally connected to the front link 2 and the rear support rod 3 through the lower push rod 51. In other embodiments, the push rod 5 can also be configured in other collapsible ways such as sliding and telescopic.

In this way, on each side bracket 10 of the stroller frame of this embodiment, the front link 2, the lower push rod 51, the rear support rod 3 and the diagonal support rod 4 form a four-bar linkage mechanism. The rod 12, the diagonal support rod 4 and the rear support rod 3 form a crank-slider mechanism, and the seat post 61, the sliding sleeve 62, the lower push rod 51 and the front connecting rod 2 also form a crank-slider mechanism. The locking mechanism on the stroller frame includes a locking joint 9 located between the upper part of the front link 2 and the lower part of the lower push rod 51 for locking the two. When the locking joint 9 is locked, the above-mentioned four-bar linkage and Both slider crank mechanisms are locked. When setting, the locking joint 9 and the push rod locking joint 53 can be set to be linked and unlocked. Specifically, after the push rod locking member 53 is unlocked, the upper push rod 52 is rotated and folded relative to the lower push rod 51. The locking joint 9 makes the folding operation of the frame smoother and more convenient, and simplifies the user's operation process during the folding process of the frame.

Referring to Figures 1 and 2, the cross brace assembly includes a bottom brace assembly 7 located between the bottom bars 1 on both sides and an upper brace located between the lower part of the front link 2 on both sides and the rear part of the seat post 61. Rod assembly 8. In this embodiment, both the bottom support rod assembly 7 and the upper support rod assembly 8 adopt cross support assemblies.

Specifically, the bottom strut assembly 7 includes two bottom struts 71 that are arranged crosswise and pivotally connected at the intersection. The two bottom struts 71 each extend in the front and rear direction. Each bottom strut 71 is connected to both sides in the following manner. The bottom pole 1 is connected: the front part of the bottom support pole 71 is rotatably connected to the front part of the rear pole 12 on one side, and the rear part of the bottom pole 71 is rotatably connected to the rear part of the front pole 11 on the other side. . While the two bottom support rods 71 rotate relative to each other and converge in the left and right directions, the front rod 11 and the rear rod 12 on the bottom rod 1 on both sides expand and contract relative to each other in the front and rear direction.

The upper strut assembly 8 includes two upper struts 81 that cross each other and are pivotally connected at the intersection. The two upper struts 81 extend upwardly from the front to the rear. Each upper strut 81 is connected to the sides of both sides in the following manner. The bracket 10 realizes connection: the front part of the upper strut 81 is rotatably connected to the lower part of the front link 2 or the lower part of the diagonal strut 4 on one side, and the rear part of the upper strut 81 is rotatably connected to the seat post on the other side. 61 on the rear. In this embodiment, the front part of the upper stay 81 is pivotally connected to a front connecting piece 83 through a front connecting shaft 82. The front connecting piece 83 is connected to the front link 2 and the front link 2 through the aforementioned first axis 101/fifth axis 105. The diagonal support rods 4 are pivotally connected, and the axis center line of the front connecting shaft 82 and the axis center line of the first shaft 101 are arranged perpendicularly to each other; the rear part of the upper support rod 81 is rotationally connected to the seat post 61 through the rear connecting piece 84 At the rear, the rear connector 84 is located on the seat post 61 behind the slide 62 .

The wheel assemblies are divided into two groups located on the left and right sides. Each group of wheel assemblies includes a front wheel assembly 20 located at the front of the bottom of the front pole 11 and a rear wheel assembly 30 located at the bottom and rear of the rear pole 12 . When the stroller frame is in the unfolded state, as shown in Figures 1 to 4 of the accompanying drawings, the side brackets 10 on both sides are unfolded respectively, and the bottom strut assembly 7 and the upper strut assembly 8 are respectively unfolded and supported on both sides in the left and right directions. Between the side supports 10, two sets of front wheel assemblies 20 and rear wheel assemblies 30 are jointly supported on the ground. On each side bracket 10, a triangular stable support structure is formed between the bottom rod 1, the front link 2 and the rear support rod 3, so that the frame has good rigidity in the unfolded state.

When the stroller frame needs to be folded, after unlocking the push rod lock 53, drive the upper push rod 52 to flip and fold relative to the lower push rod 51 in the direction A in Figure 3, until the upper push rod 52 flips and folds to Lower the rear side of the push rod 51, as shown in Figure 5. At this time, the locking joint 9 is unlocked; continue to flip the entire push rod 5 forward in the direction B in Figure 5, which makes the bottom rod of each side bracket 10 1. The front link 2, the rear stay 3, the diagonal stay 4, the seat post assembly 6 and the push rod 5 rotate relative to each other and gradually converge in the up and down direction, and the rear post 12 in the bottom post 1 gradually moves toward the front post 11 Sliding forward in direction C causes the rear wheel assembly 30 to move forward toward the front wheel assembly 20, as shown in Figures 6 and 7 . At the same time, the two bottom struts 71 and the two upper struts 81 rotate relative to each other and gradually converge in the left and right directions, further driving the rods in each side bracket 100 to gradually converge in the up and down direction. Finally, the stroller frame is folded as shown in Figure 8 and Figure 9. The front rod 11 and the rear rod 12 in the bottom rod 1 slide and shorten in the front and rear direction. The front link 2, the rear support rod 3, the diagonal support rod 4, and the seat The rod 61 and the push rod 5 are tightly gathered in the up and down direction, and the bottom support rod assembly 7 and the upper support rod assembly 8 are gathered in the left and right directions so that the brackets 10 on both sides are folded in the transverse direction. The stroller frame is composed of the front wheel assembly 20 and the rear wheel assembly. The components 30 are supported together on the ground. The size of the folded frame is significantly reduced in all directions, and the rods are arranged compactly, presenting a very flat structure for easy storage and transportation.

When the stroller frame needs to be unfolded and used, it is only necessary to pull the upper push rod 52 upward, flip it open relative to the lower push rod 51, and drive the upper part of the front link 2 and the rear support rod 3 through the lower push rod 51. After the upper part of the bracket 10 moves up, the rods in each side bracket 10 move relative to each other and gradually open in the front-rear direction and the up-down direction. The support rods 81 rotate relative to each other and gradually open in the left and right directions, so that the stroller frame gradually expands in the left and right directions. After the stroller frame is fully expanded, the locking joint 9 and the push rod locking member 53 are respectively locked, and the stroller frame is stably locked in the expanded state.

In summary, the bidirectional folding stroller of the present invention has a simple and reliable frame folding principle, can realize the folding and unfolding of the stroller in the front and rear, left and right, and up and down directions, is easy to carry, easy to operate, and has strong practicability.

The above embodiments are only for illustrating the technical concepts and characteristics of the present invention. Their purpose is to enable those familiar with this technology to understand the content of the present invention and implement it accordingly. They cannot limit the scope of protection of the present invention. All equivalent changes or modifications made based on the spirit and essence of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The bidirectional folding cart comprises a cart frame with an unfolding state and a folding state, a wheel assembly arranged at the bottom of the cart frame, and a locking mechanism for locking the cart frame in the unfolding state, wherein the cart frame comprises two side brackets arranged at the left side and the right side respectively and a transverse support assembly arranged between the side brackets at the two sides and capable of being folded transversely, the bidirectional folding cart is characterized in that the side brackets at each side comprise a bottom rod, a front connecting rod, a rear supporting rod, an inclined supporting rod, a push rod and a seat rod assembly,

the bottom rod comprises a front rod and a rear rod which extend along the front-rear direction respectively and relatively slide and stretch along the front-rear direction, the front connecting rod extends from front to rear in an upward tilting manner, the lower part of the front connecting rod is in pivot connection with the front part of the front rod through a first shaft, and the upper part of the front connecting rod is in pivot connection with the lower part of the push rod through a second shaft; the rear stay bar extends along the up-down direction, the lower part of the rear stay bar is connected to the rear stay bar through a third shaft pivot, the upper part of the rear stay bar is connected with the lower part of the push rod through a fourth shaft pivot, and the axial leads of the second shaft and the fourth shaft are mutually parallel; the front part of the diagonal brace is connected to the lower part of the front connecting rod through a fifth shaft pivot or is connected to the front part of the front rod through a sixth shaft pivot, the rear part of the diagonal brace is connected to the rear brace through a sixth shaft pivot, the axes of the first shaft and the fifth shaft extend in parallel or in a line, the seat rod assembly comprises a seat rod extending in the front-rear direction and a sliding piece connected to the rear brace through a pivot, the front part of the seat rod is connected to the front connecting rod through a pivot, and the sliding piece is slidingly arranged on the seat rod along the extending direction of the seat rod;

the upper brace component comprises two upper brace rods which are arranged in a crossing way and are connected with the rear part of the seat rod in a pivot way, the upper brace rods are arranged in a tilting way from front to back, the front parts of the upper brace rods are rotationally connected with the lower parts of the front connecting rods or the lower parts of the diagonal brace rods on one side and the rear parts of the upper brace rods are rotationally connected with the rear parts of the seat rods on the other side, the front parts of the upper brace rods are connected with front connecting pieces through front connecting shafts in a pivot way, the front connecting pieces are connected with the front connecting rods through first shafts/fifth shafts in a pivot way, the first shafts and the axes of the fifth shafts are arranged in a collinear way, the axes of the front connecting shafts and the axes of the first shafts are mutually perpendicular,

when the trolley frame is in a folded state, the front rod and the rear rod in the bottom rod slide and shorten along the front-rear direction, and the front connecting rod, the rear supporting rod, the diagonal supporting rod, the seat rod and the push rod are folded above the bottom rod along the up-down direction.

2. The bi-fold cart of claim 1, wherein: the bottom stay bar assembly comprises two bottom stay bars which are arranged in a crossing way and are connected with each other in a pivot way at the crossing part, the bottom stay bars extend along the front-back direction, the front parts of the bottom stay bars are rotationally connected with the front parts of the rear rods on one side, and the rear parts of the bottom stay bars are rotationally connected with the rear parts of the front rods on the other side.

3. The bi-fold cart of claim 1, wherein: the rear part of the upper stay bar is connected to the rear part of the seat bar through a rear connecting piece, and the rear connecting piece is positioned behind the sliding piece on the seat bar.

4. The bi-fold cart of claim 1, wherein: the rear rod is provided with a chute extending along the length direction and having a downward opening, and the rear part of the front rod is inserted in the chute in a sliding fit manner.

5. The bi-fold cart of claim 1, wherein: the front part of the seat rod is connected to the front connecting rod through a seventh shaft pivot, the sliding piece is connected to the rear supporting rod through an eighth shaft pivot, the seventh shaft is located between the first shaft and the second shaft on the front connecting rod, and the eighth shaft is located between the fourth shaft and the sixth shaft on the rear supporting rod.

6. The bi-fold cart of claim 1, wherein: the wheel assemblies are provided with two groups which are respectively arranged at the left side and the right side, each group of wheel assemblies comprises a front wheel assembly arranged at the front part of the front rod bottom and a rear wheel assembly arranged at the rear part of the rear rod bottom, and when the cart frame is in a folded state, the two groups of front wheel assemblies and the rear wheel assemblies are jointly supported on the ground.

7. The bi-fold cart of claim 1, wherein: the push rod comprises an upper push rod and a lower push rod which are folded relatively along the length direction, and a push rod locking piece for locking the upper push rod and the lower push rod, and the lower push rod is connected with the front connecting rod and the rear supporting rod.

8. The bi-fold cart of claim 7, wherein: the locking mechanism comprises a locking joint which is arranged between the upper part of the front connecting rod and the lower part of the lower push rod and used for locking the front connecting rod and the lower push rod, and the locking joint is in linkage unlocking in the process that the upper push rod is folded relative to the lower push rod after the push rod locking piece is unlocked.