CN108583669A - Bi-directional foldable stroller - Google Patents

Abstract

The invention discloses a kind of Bi-directional foldable strollers, its stroller frame includes the side stand for being divided into the left and right sides and the stull component between the side stand of both sides, side stand per side includes bottom bar, front rod, rear pole, hound, push rod and seat bar assembly, wherein, bottom bar includes respectively extending along the longitudinal direction and along the longitudinal direction with respect to the front bar of sliding extension and rear bar.Rotating push-rod is only needed when folding the stroller frame, relative motion folding between bottom bar, front rod, rear pole, hound, push rod and seat bar assembly can be driven and make the gradually gathering in left-right direction simultaneously of both sides side stand, realize stroller frame in upper and lower, front and back and three directions in left and right gathering, its is simple and reliable for structure, it is easy to operate, folding can be rapidly completed, cart body product is compact after folding, convenient for storage, carries.

Description

Two-way folding cart

technical field

The invention relates to a bidirectional folding cart.

Background technique

At present, 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 small folding carts, the folding operation is relatively cumbersome, and usually requires multiple steps to achieve complete folding. Therefore, we need a stroller with small folding volume and convenient folding.

Contents of the invention

The object of the present invention is to provide a two-way folding stroller with convenient 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, including a cart frame with an unfolded state and a folded state, a wheel assembly arranged at the bottom of the cart frame, and a The trolley frame is locked by a locking mechanism in an unfolded state. The trolley frame includes two side brackets arranged on the left and right sides and a side bracket arranged between the side brackets on both sides and capable of being folded in the transverse direction. a cross brace assembly, said side bracket on each side comprising a bottom bar, front link, rear stay, diagonal stay, pushrod and seat post assembly,

The bottom bar includes a front bar and a rear bar that respectively extend along the front-to-back direction and relatively slide and stretch along the front-to-back direction. The front link extends upwardly from the front to the rear. The upper part of the front link is pivotally connected with the lower part of the push rod through the second shaft; the rear strut extends in the vertical direction, and the lower part of the rear strut It is pivotally connected to the rear bar through a third shaft, the upper part of the rear support bar is pivotally connected with the lower part of the push rod through a fourth shaft, and the axis line between the second shaft and the fourth shaft Arranged parallel to each other; the diagonal braces extend along the front-to-back direction, and the front part of the diagonal braces is pivotally connected to the lower part of the front connecting rod or pivotally connected to the front part of the front rod through the fifth shaft Above, the rear part of the diagonal strut is pivotally connected to the rear strut via the sixth axis, the axis lines of the first axis and the fifth axis extend parallel to or collinear with each other, and the seat post assembly including a seat post extending in a front-to-rear direction and a slider pivotally connected to said rear stay, the front portion of said seat post being pivotally connected to said front link, said slider extending along said seat post The extension direction is slidably arranged on the seatpost; the cross brace assembly includes a bottom brace assembly arranged between the bottom bars on both sides, and the lower part of the front link on both sides and the the upper strut assembly between the rear of the seat post.

Preferably, the bottom brace assembly includes two bottom braces arranged intersecting and pivotally connected at the intersections, the bottom braces extend along the front-to-rear direction, and the front parts of the bottom braces are rotatably connected to a The front part of the rear bar on one side and the rear part of the bottom support bar are rotatably connected to the rear part of the front bar on the other side.

Preferably, the upper strut assembly includes two upper struts arranged to cross each other and pivotally connected at the intersections, the upper struts are arranged to extend upwardly from front to rear, and the front parts of the upper struts rotate The lower part of the front connecting rod on one side or the lower part of the diagonal strut is ground-connected and the rear part of the upper strut is rotatably connected to the rear part of the seatpost 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 connecting rod or the diagonal through the first shaft/fifth shaft. The struts are pivotally connected, the axis lines of the first axis and the fifth axis are arranged in line, and the axis lines of the front connecting axis and the axis lines of the first axis are arranged perpendicular to each other .

As a specific implementation, the rear part of the upper strut 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 sliding slot extending along its length direction and opening downward, and the rear part of the front rod is inserted into the sliding slot in a sliding fit.

Preferably, a front portion of said seatpost is pivotally connected to said front link by a seventh axis, said slider is pivotally connected to said rear stay by an eighth axis, said seventh axis being The front link is located between the first shaft and the second shaft, and the eighth shaft is located between the fourth shaft and the sixth shaft on the rear strut.

Preferably, the wheel assembly has two groups arranged on the left and right sides, and each group of the wheel assembly includes a front wheel assembly arranged at the front of the front pole bottom and a rear wheel assembly arranged at the rear of the rear pole bottom. As for the wheel assembly, when the cart frame is in a folded state, two groups of the front wheel assembly and the rear wheel assembly are jointly supported on the ground.

Preferably, the push rod includes an upper push rod and a lower push rod that are relatively folded along the length direction, and a push rod lock for locking the upper push rod and the lower push rod. A rod is connected to the front link and the rear strut.

Further preferably, the locking mechanism includes a locking joint arranged between the upper part of the front link and the lower part of the lower push rod for locking the two, and the push-up When the rod is retracted relative to the lower push rod, the locking joint is unlocked in a linked manner.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: the two-way folding cart of the present invention only needs to rotate the push rod when folding to drive the bottom bar, the front connecting rod, the rear strut, the inclined The relative movement between the strut, the push rod and the seatpost assembly makes the side brackets on both sides gradually retract along the left and right directions at the same time, so as to realize the retraction of the cart frame in the three directions of up and down, front and rear, and left and right. Its structure is simple and reliable. The operation is very convenient, and the folding can be completed quickly. After folding, the cart is compact and easy to store and carry.

Description of drawings

Accompanying drawing 1 is the three-dimensional view one of folding cart of the present invention under unfolded state;

Accompanying drawing 2 is the second perspective view of the foldable stroller of the present invention in an unfolded state;

Accompanying drawing 3 is the side view of the folding cart of the present invention in an unfolded state;

Accompanying drawing 4 is the side view schematic diagram of the use state of the folding cart of the present invention after the seat pocket cloth cover is placed;

Accompanying drawing 5 is the side view after the push rod is folded on the folding cart of the present invention;

Accompanying drawing 6 is a side view of the folding cart of the present invention in a half-folded state;

Accompanying drawing 7 is the axonometric view of the folding cart of the present invention in a half-folded state;

Accompanying drawing 8 is a side view of the folding cart of the present invention in a folded state;

Accompanying drawing 9 is the top view of the folding cart of the present invention in a folded state;

Among them: 10, side bracket; 20, front wheel assembly; 30, rear wheel assembly; 40, seat pocket cloth cover;

1. Bottom rod; 11. Front rod; 12. Rear rod; 2. Front connecting rod; 3. Rear strut; 4. Diagonal strut; 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 support rod assembly; 71. Bottom support rod; 8. Upper support rod assembly; 81. Upper Strut; 82, front connecting shaft; 83, front connecting piece; 84, rear connecting piece; 9, locking joint;

101, the first axis; 102, the second axis, 103, the third axis; 104, the fourth axis; 105, the fifth axis; 106, the sixth axis; 107, the seventh axis; 108, the eighth axis.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to the bidirectional folding cart shown in Figures 1 to 9, it includes a cart frame with an unfolded state and a folded state, a wheel assembly located at the bottom of the cart frame, and a wheel assembly for locking the cart frame in the unfolded state The following locking mechanism, wherein the stroller frame includes two side brackets 10 respectively arranged on the left and right sides, and a cross brace assembly arranged between the side brackets 10 on both sides and capable of being folded in the transverse direction.

Referring to FIGS. 1 to 4 , the side bracket 10 on each side includes a bottom bar 1 , a front link 2 , a rear strut 3 , a diagonal strut 4 , a push rod 5 and a seat post assembly 6 . The bottom bar 1 includes a front bar 11 and a rear bar 12 that extend along the front-to-back direction and can slide and stretch relative to each other along the front-to-back direction. , the rear part of the front bar 11 is inserted in the above-mentioned slide groove in a sliding fit.

The front connecting rod 2 extends upwardly from the front to the rear, the lower part of the front connecting rod 2 is pivotally connected with the front part of the front bar 11 through the first shaft 101, and the upper part of the front connecting rod 2 and the lower part of the push rod 5 are connected through the second shaft. 102 is pivotally connected; the lower part of the rear strut 3 is pivotally connected to the rear bar 12 through the third shaft 103, and the upper part of the rear strut 3 is pivotally connected with the lower part of the push rod 5 through the fourth shaft 104. The axis lines of the four shafts 104 and the second shaft 102 are arranged parallel to each other; the front part of the diagonal brace 4 is pivotally connected to the bottom of the front connecting rod 2 or pivotally connected to the front part of the front bar 11 through the fifth shaft 105 Above, the rear part of the diagonal strut 4 is pivotally connected to the rear strut 3 through the sixth shaft 106, and the axis lines of the first shaft 101 and the fifth shaft 105 extend parallel to each other or collinearly. In this embodiment , the first axis 101 and the fifth axis 105 are arranged coaxially.

The seat post assembly 6 includes a seat post 61 extending in the front-to-rear direction and a slider 62 pivotally connected to the rear strut 3. The front part of the seat post 61 is pivotally connected to the front link 2 through a seventh shaft 107, sliding The member 62 here is a sliding sleeve that is slidably sleeved on the seat post 61. The sliding sleeve 62 is pivoted on the rear strut 3 through the eighth shaft 108, and the above-mentioned seventh shaft 107 is on the front link 2. The eighth shaft 108 is located between the fourth shaft 104 and the sixth shaft 106 on the rear strut 3 . A seat cover 40 can be arranged 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 jointly form a seat mechanism for children to sit on the stroller frame, as shown in the figure 4.

1 to 4, in this embodiment, the push rod 5 includes a lower push rod 51 and an upper push rod 52 that are relatively folded along the length direction, and are used to lock the upper push rod 52 and the lower push rod 51. The push rod locking part 53, the push rod 5 is pivotally connected with the front connecting rod 2 and the rear strut 3 respectively through the lower push rod 51. In other embodiments, the push rod 5 can also be arranged in other collapsible manners such as sliding and telescopic.

In this way, on each side bracket 10 of the cart frame of the present embodiment, a four-bar linkage mechanism is formed between the front connecting rod 2, the lower push rod 51, the rear strut 3 and the diagonal strut 4, and the front rod 11, the rear A slider crank mechanism is formed between the bar 12, the diagonal brace 4 and the rear brace 3, and a slider crank mechanism is also formed between the seat post 61, the sliding sleeve 62, the lower push rod 51 and the front connecting rod 2. The locking mechanism on the stroller frame includes a locking joint 9 that is arranged between the top of the front link 2 and the bottom of the lower push rod 51 to lock 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 lock joint 9 and the push rod lock joint 53 can be set to be unlocked in conjunction with each other, specifically, the upper push rod 52 is turned and folded relative to the lower push rod 51 after the push rod lock 53 is unlocked. The locking joint 9 makes the folding operation of the vehicle frame more smooth and convenient, and simplifies the user's operation process in the process of folding the vehicle frame.

Referring to Fig. 1 and Fig. 2, the cross brace assembly includes a bottom brace assembly 7 arranged between the bottom bars 1 on both sides and an upper brace arranged between the lower part of the front link 2 on both sides and the rear part of the seat post 61 rod assembly8. In this embodiment, both the bottom brace assembly 7 and the upper brace assembly 8 are cross brace assemblies.

Specifically, the bottom strut assembly 7 includes two bottom struts 71 that are intersected and pivotally connected at the intersections. The two bottom struts 71 each extend along the front-to-back direction, and each bottom strut 71 is connected to both sides in the following manner The bottom bar 1 realizes the connection: the front part of the bottom brace 71 is rotatably connected to the front part of one side rear bar 12 and the rear part of the bottom brace 71 is rotatably connected to the rear part of the other side front bar 11 . While the two bottom support rods 71 are relatively rotated and folded in the left and right directions, the front rod 11 and the rear rod 12 of the bottom rods 1 on both sides are relatively stretched in the front and rear directions.

The upper strut assembly 8 includes two upper struts 81 that intersect each other and are pivotally connected at the intersection. The two upper struts 81 extend upwardly from the front to the rear respectively. The bracket 10 realizes the 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 portion of the upper strut 81 is pivotally connected to the front connecting member 83 through the front connecting shaft 82, and the front connecting member 83 is connected to the front connecting rod 2 and the front connecting rod 2 through the aforementioned first shaft 101/fifth shaft 105. The diagonal struts 4 are pivotally connected, and the axis line of the front connecting shaft 82 and the axis line of the first shaft 101 are arranged perpendicular to each other; Rear, the rear link 84 is located on the seatpost 61 behind the sliding sleeve 62 .

The wheel assembly has two groups that are divided into left and right sides, and each group of wheel assembly includes a front wheel assembly 20 located at the bottom front portion of the front pole 11 and a rear wheel assembly 30 located at the rear portion at the bottom of the rear pole 12 . When the cart frame is in the unfolded state, as shown in Figure 1 to Figure 4, 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 along the left and right directions. Two sets of front wheel assemblies 20 and rear wheel assemblies 30 are jointly supported on the ground between the side brackets 10 . On each side bracket 10, a triangular stable support structure is formed between the bottom bar 1, the front link 2 and the rear strut 3, so that the vehicle frame has good rigidity in the unfolded state.

When the cart frame needs to be folded up, after the push rod lock 53 is unlocked, the upper push rod 52 is turned over and folded relative to the lower push rod 51 according to the direction A in Figure 3 until the upper push rod 52 is turned over and folded 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 turn the push rod 5 as a whole forward in the direction of B in Figure 5, which makes the bottom rod of each side bracket 10 1. The front connecting rod 2, the rear strut 3, the diagonal strut 4, the seat post assembly 6 and the push rod 5 are relatively rotated and gradually folded in the up and down direction, and the rear rod 12 of the bottom rod 1 is gradually closed relative to the front rod 11. Slide forward along direction C, so that the rear wheel assembly 30 moves forward and approaches the front wheel assembly 20, as shown in FIG. 6 and FIG. 7 . At the same time, the two bottom struts 71 and the two upper struts 81 are rotated relative to each other to gradually draw in the left and right directions, further driving the rods in the side brackets 100 to gradually draw in the up and down directions. Finally, the cart frame is folded as shown in Figure 8 and Figure 9, the front bar 11 and the rear bar 12 in the bottom bar 1 slide and shorten along the front and rear directions, the front connecting rod 2, the rear strut 3, the diagonal strut 4, the seat Rod 61 and push rod 5 are closely folded up and down, and bottom strut assembly 7 and upper strut assembly 8 are folded in left and right directions so that both side supports 10 are folded in lateral direction, and the cart frame is composed of front wheel assembly 20 and rear wheel assembly. The components 30 are jointly supported 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, which is convenient for storage and transportation.

When the stroller frame needs to be expanded and used, it is only necessary to pull the upper push rod 52 upwards to open it relative to the lower push rod 51, and drive the upper part of the front connecting rod 2 and the rear strut 3 through the lower push rod 51. After the upper part of the upper part goes up, the rods in each side bracket 10 will move relative to each other and gradually open along the front-rear direction and the up-down direction. The struts 81 are respectively rotated relative to each other and gradually opened along the left and right directions, so that the cart frame is gradually unfolded along the left and right directions. After the cart frame is fully unfolded, the locking joint 9 and the push rod locking member 53 are respectively locked, and the cart frame is stably locked in the unfolded state.

To sum up, the folding principle of the frame of the bidirectional folding cart of the present invention is simple and reliable, and can realize folding and unfolding of the cart in front, rear, left and right, up and down directions, and is easy to carry, easy to operate, and highly practical.

The above-mentioned embodiments are only for illustrating the technical conception and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A bidirectional folding cart, comprising a cart frame with an unfolded state and a folded state, a wheel assembly located at the bottom of the cart frame, and used to lock the cart frame in the unfolded state The locking mechanism of the trolley, the cart frame includes two side brackets on the left and right sides and a horizontal brace assembly that is arranged between the side brackets on both sides and can be folded in the transverse direction, and is characterized in that each side The side brackets each include a bottom bar, a front link, a rear brace, a diagonal brace, a push rod and a seat post assembly, The bottom bar includes a front bar and a rear bar that respectively extend along the front-to-back direction and relatively slide and stretch along the front-to-back direction. The front link extends upwardly from the front to the rear. The upper part of the front link is pivotally connected with the lower part of the push rod through the second shaft; the rear strut extends in the vertical direction, and the lower part of the rear strut It is pivotally connected to the rear bar through a third shaft, the upper part of the rear support bar is pivotally connected with the lower part of the push rod through a fourth shaft, and the axis line between the second shaft and the fourth shaft Arranged parallel to each other; the diagonal braces extend along the front-to-back direction, and the front part of the diagonal braces is pivotally connected to the lower part of the front connecting rod or pivotally connected to the front part of the front rod through the fifth shaft Above, the rear part of the diagonal strut is pivotally connected to the rear strut via the sixth axis, the axis lines of the first axis and the fifth axis extend parallel to or collinear with each other, and the seat post assembly including a seat post extending in a front-to-rear direction and a slider pivotally connected to said rear stay, the front portion of said seat post being pivotally connected to said front link, said slider extending along said seat post The extending direction of is slidably arranged on the seat post; The cross brace assembly includes a bottom brace assembly arranged between the bottom bars on both sides, and an upper brace assembly arranged between the lower part of the front link rod on both sides and the rear part of the seat post . 2. The two-way folding stroller according to claim 1, wherein the bottom brace assembly includes two bottom braces that are intersected and pivotally connected at the intersections, and the bottom braces are along the front-to-rear direction Extending, the front part of the bottom brace is rotatably connected to the front part of the rear bar on one side and the rear part of the bottom brace is rotatably connected to the rear part of the front bar on the other side. 3. The two-way folding stroller according to claim 1, wherein the upper strut assembly includes two upper struts that are arranged to cross each other and are pivotally connected at the intersection, and the upper struts are arranged from front to rear The front part of the upper strut is rotatably connected to the lower part of the front connecting rod on one side or the lower part of the diagonal strut and the rear part of the upper strut is rotatably connected to the other side. One side of the rear of the seat post. 4. The two-way folding stroller according to claim 3, characterized in that: the front part of the upper strut is pivotally connected to the front connecting piece through the front connecting shaft, and the front connecting piece is pivoted through the first shaft / The fifth shaft is pivotally connected to the front connecting rod or the diagonal brace, the axis line of the first axis and the fifth shaft is arranged in line, and the axis line of the front connecting shaft set perpendicularly to the axis of the first axis. 5. The two-way folding stroller according to claim 3, characterized in that: the rear part of the upper strut is connected to the rear part of the seatpost through a rear connecting piece, and the rear connecting piece is connected to the rear part of the seatpost on the rear of the slider. 6. The two-way folding stroller according to claim 1, characterized in that: the rear rod is provided with a chute extending along its length direction and opening downward, and the rear part of the front rod is inserted in a sliding fit in the chute. 7. The bi-directional folding stroller of claim 1, wherein the front portion of the seat post is pivotally connected to the front link by a seventh axis, and the slider is pivoted by an eighth axis connected to the rear strut, the seventh shaft is located between the first shaft and the second shaft on the front link, and the eighth shaft is located on the rear strut between the fourth axis and the sixth axis. 8. The two-way folding stroller according to claim 1, characterized in that: the wheel assembly has two groups arranged on the left and right sides, and each group of the wheel assembly includes a The front wheel assembly and the rear wheel assembly are arranged at the rear of the rear pole bottom. When the cart frame is in a folded state, two groups of the front wheel assembly and the rear wheel assembly are jointly supported on the ground. 9. The two-way folding cart according to claim 1, wherein the push rod includes an upper push rod and a lower push rod that are relatively folded along the length direction, and is used for connecting the upper push rod and the The push rod lock is locked by the lower push rod, and the lower push rod is connected with the front connecting rod and the rear support rod. 10. The two-way folding stroller according to claim 9, wherein the locking mechanism includes a locking mechanism arranged between the upper part of the front link and the lower part of the lower push rod for locking both of them. After the push rod lock is unlocked, the upper push rod is retracted relative to the lower push rod to unlock the locking joint.