CN104260770A - Folding cart - Google Patents

Abstract

The invention discloses a folding cart. A cart frame comprises a front support, a rear support, a pushing rod, a connecting rod and a bottom strut. A sliding part is connected to the rear support in a pivot mode; the sliding part is arranged on the front support in a sliding mode in the length extending direction of the front support; the lower portion of the pushing rod is connected with the upper portion of the rear support in a pivot mode; the upper portion of the connecting rod is connected to the pushing rod in a pivot mode; the lower portion of the connecting rod is connected to the upper portion of the front support in a pivot mode; the bottom strut is arranged between the front support and the rear support; the front portion of the bottom strut is rotatably connected to the lower portion of the front support; the rear portion of the bottom strut is rotatably connected to the lower portion of the rear support. According to the folding cart, the number of rod pieces on the cart frame is small, and folding operation and unfolding operation are easy; when the cart frame is folded, the front support, the rear support, the pushing rod, the connecting rod and the bottom strut can be tightly drawn close, and therefore the folded cart frame is quite compact in structure, small in occupied space and easy to store and carry.

Description

foldable stroller

the

technical field

The invention relates to a folding cart.

the

Background technique

The children's stroller in the prior art includes a stroller frame with an unfolded position and a folded position, a wheel assembly arranged at the bottom of the stroller frame, and a wheel assembly arranged on the stroller frame to lock the stroller frame in the unfolded position the locking mechanism. There are many types of existing cart frames, and the number of rods is also different, and the connection relationship and connection position between the rods are different, so the folding principles and folding methods of the cart frames are also different. On the premise of ensuring good stability of the stroller, reducing the number of rods on the stroller as much as possible, simplifying the folding operation, and reducing the volume of the folded stroller are the goals that are continuously pursued by those skilled in the art.

the

Contents of the invention

The object of the present invention is to provide a folding cart with few bars, simple structure and convenient operation.

In order to achieve the above object, the technical solution adopted by the present invention is: a foldable cart, comprising a foldable cart frame, a wheel assembly arranged at the bottom of the cart frame, and used for turning the cart frame a locking mechanism locked in the deployed state, the cart frame comprising:

front bracket;

a rear bracket, a slider is pivotally connected to the rear bracket, and the slider is slidably arranged on the front bracket along the length extension direction of the front bracket;

a push rod, the lower part of which is pivotally connected to the upper part of the rear bracket;

a connecting rod, the upper part of the connecting rod is pivotally connected to the push rod, and the lower part of the connecting rod is pivotally connected to the upper part of the front bracket;

The bottom bracket is arranged between the front bracket and the rear bracket, the front part of the bottom bracket is rotatably connected to the lower part of the front bracket, and the rear part of the bottom bracket is rotatably connected to the Describe the lower part of the rear bracket.

Preferably, the rear support includes two rear support rods respectively located on the left and right sides, an upper support rod fixedly connected between the rear support rods on both sides, and the front support is located on the rear support rods on both sides. between the rods, and the slider is pivotally connected to the upper strut.

Further, the lower parts of the rear struts on both sides are fixedly connected with lower struts, and the rear parts of the bottom bracket are rotatably connected to the lower struts.

Further, the connecting rod is a U-shaped rod with an upward opening, and the upper ends of the two sides of the connecting rod are respectively pivotally connected to the push rod.

Further, the slider is located on the front frame below the pivot connection point between the link and the front frame.

Further, the push rod is a U-shaped rod with an opening facing forward, and the lower ends of the two sides of the push rod are respectively pivotally connected to the rear support rods on both sides.

Further, the rear support rod is inclined forward from bottom to top, and is bent and extended at the top to form a connecting portion, and the lower part of the push rod is pivotally connected to the upper end of the connecting portion.

Preferably, the sliding member is a sliding sleeve that is slidably sleeved on the front bracket up and down.

Preferably, the locking mechanism is a locking member provided between the sliding member and the front bracket for locking the two.

Further preferably, the upper part of the front bracket is further provided with an unlocking part for unlocking the locking part.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: the folding cart of the present invention has fewer rods, its folding and unfolding operations are very simple, and the cart frame in the unfolded state has a simple structure and appearance Elegant, when the stroller frame is folded, the front bracket, rear bracket, push rod, connecting rod and bottom bracket can be closely connected together, making the folded stroller frame very compact in structure, occupying less space, and easy to use. Store and carry.

the

Description of drawings

Accompanying drawing 1 is the perspective view that folding cart of the present invention is in unfolded state;

Accompanying drawing 2 is the side view of the folding cart of the present invention in an unfolded state;

Accompanying drawing 3 is the perspective view of the folding cart of the present invention in a half-folded state;

Accompanying drawing 4 is the side view of the folding cart of the present invention in a half-folded state;

Accompanying drawing 5 is the perspective view of the foldable stroller of the present invention in a folded state;

Accompanying drawing 6 is the side view of the foldable stroller of the present invention in a folded state;

Among them: 1. Front support; 2. Rear support; 21. Rear support rod; 210. Connecting part; 22. Upper support rod; 23. Lower support rod; 3. Push rod; 4. Connecting rod; 5. Slider ( sliding sleeve); 6. Bottom support frame; 7. Unlocking piece; 8. Front wheel; 9. Rear wheel.

the

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 folding cart shown in Figures 1 to 6, the folding cart includes a foldable cart frame, a wheel assembly located at the bottom of the cart frame, and a lock for locking the cart frame in an unfolded state. locking mechanism.

The stroller frame includes a front bracket 1, a rear bracket 2, a push rod 3, and a connecting rod 4 arranged between the push rod 3 and the front bracket 1. A slider 5 is connected to the rear bracket 2 , and the slider 5 is provided on the front bracket 1 so as to be slidable along the length extension direction of the front bracket 1 . The lower part of the push rod 3 is pivotally connected to the upper part of the rear bracket 2, the upper part of the connecting rod 4 is pivotally connected to the push rod 3, and the pivot connection point between the connecting rod 4 and the push rod 3 is located on the push rod 3. Above the pivot connection point between the push rod 3 and the rear bracket 2; the lower part of the connecting rod 4 is pivotally connected to the upper part of the front bracket 1, and the slider 5 is located on the front bracket 1 between the connecting rod 4 and the front bracket 1. Below the axis connection point.

The stroller frame also includes a bottom bracket 6 arranged between the front bracket 1 and the rear bracket 2, the front portion of the bottom bracket 6 is connected to the lower part of the front bracket 1 in rotation, and the rear portion is connected to the rear bracket in rotation. The lower part of the bracket 2. A slider crank mechanism is formed between the front bracket 1, the rear bracket 2, the bottom bracket 6 and the slider 5.

Referring to the accompanying drawings, the foldable stroller of this embodiment is a three-wheeled children's stroller, and the rear support 2 includes two rear support rods 21 respectively located on the left and right sides, and an upper support rod connected between the two rear support rods 21. The strut 22 and the upper strut 22 extend along the left-right direction of the cart frame. The sliding part 5 adopts a sliding sleeve, and the sliding part 5 is pivotally connected to the middle part of the upper strut 22 . The wheel assembly includes a front wheel 8 arranged at the bottom of the front bracket 1 and two rear wheels 9 respectively arranged at the bottom of the rear struts 21 on both sides.

The rear bracket 2 also includes a lower brace 23 fixedly connected to the bottom of the rear brace 21 on both sides. On the strut 23, here, the lower strut 23 extends along the left-right direction of the cart frame, the rear part of the bottom brace 6 is connected on the lower strut 23 around the lower strut 23 in rotation, and the front part of the bottom brace 6 Then the pivot is connected to the bottom of the front support 1 .

Referring to the drawings, the rear support rods 21 on both sides are inclined forward from bottom to top, and are bent and extended at the top to form a connecting part 210. The push rod 3 is a U-shaped rod with an opening facing forward. 3. The lower parts on both sides are respectively pivotally connected to the upper ends of the connecting parts 210 on both sides. In this way, when the stroller frame is folded, the rear struts 21 on both sides can be closely approached to the two sides of the push rod 3 respectively. The connecting rod 4 is a U-shaped rod with an opening facing upwards. The upper ends of the two sides of the connecting rod 4 are pivotally connected to the two sides of the push rod 3 respectively, and the lower ends of the connecting rod 4 are pivotally connected to the top of the front bracket 1 .

In this embodiment, the locking mechanism is a locking member (not shown in the figure) arranged between the front bracket 1 and the sliding member 5, and the locking member can be locked in the form of a locking cylinder and a locking hole. The upper part of the front bracket 1 is also provided with an unlocking piece 7 for unlocking the above-mentioned locking piece. The unlocking piece 7 can adopt an unlocking plate, which is linked and connected with the lock cylinder in the locking piece, so that the user can step on the locking piece. The lock is unlocked when the plate is unlocked.

When the cart frame is unfolded and used, as shown in Fig. 1 and Fig. 2, the locking part is locked, the sliding part 5 is relatively fixed with the front bracket 1, and a stable support is formed between the front bracket 1, the rear bracket 2 and the bottom support bar 6. , The connecting rod 4 is stably supported between the push rod 3 and the front bracket 1. When the stroller frame needs to be folded up, the locking part is first unlocked through the unlocking part 7, the push rod 3 is pressed down, and the push rod 3 acts on the connecting rod 4 so that the connecting rod 4 drives the upper part of the front bracket 1 to go down, and simultaneously pushes The rod 3 drives the upper part of the rear bracket 2 to go down and gradually turn over towards the bottom bracket 6, which makes the slider 5 gradually slide down along the length extension direction of the front bracket 1, and drives the front bracket 1 and the rear bracket 2 to gradually move towards the bottom bracket respectively. 6 moves closer, and the push rod 3 and the connecting rod 4 also gradually move closer to the front bracket 1 and the rear bracket 2, as shown in Figures 3 and 4. Finally, the front bracket 1, the rear bracket 2, the push rod 3, the connecting rod 4 and the bottom brace 6 are all closely connected to each other to form a structure as shown in Fig. 5 and Fig. 6 . The above-mentioned folding operation is simple and convenient, and the folded cart has a compact structure and occupies less space.

When the cart frame needs to be expanded for use, then pull up the push rod 3, the push rod 3 drives the upper part of the rear bracket 2 and the upper part of the connecting rod 4 to move upward, the rear bracket 2 gradually rotates relative to the bottom bracket 6, and the connecting rod 4 drives The upper part of the front bracket 1 goes up so that the front bracket 1 gradually rotates relative to the bottom bracket 6, so that the slider 5 gradually goes up along the length extension direction of the front bracket 1 until the front bracket 1, the rear bracket 2, the push rod 3 and the connecting rod 4 After relative expansion, the sliding member 5 is locked by the locking member, and the cart is in a stable unfolded state. The above-mentioned unfolding operation is also very convenient, and the cart frame in the unfolded state has a simple structure and a beautiful appearance.

the

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the 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 Folding trolley, comprises folding stroller frame, is located at wheel assembly bottom described stroller frame, for by described stroller frame locking lockout mechanism in the deployed state, it is characterized in that, described stroller frame comprises:

Front frame;

After poppet, described after poppet head lamp brush guard pivot is connected with sliding part, and described sliding part is located on described front frame along the length bearing of trend of described front frame slidably;

Push rod, the bottom of described push rod is connected with the top phase pivot of described after poppet;

Connecting rod, the upper pivot of described connecting rod is connected on described push rod, and the lower pivot of described connecting rod is connected to the top of described front frame;

Bottom bracing frame, is located between described front frame and described after poppet, and the front portion of described bottom bracing frame is connected to the bottom of described front frame rotationally, is connected to the posterior rotation of described bottom bracing frame the bottom of described after poppet.

2. Folding trolley according to claim 1, it is characterized in that: described after poppet comprises the upper strut between two back stays laying respectively at the left and right sides, the described back stay being fixedly connected on both sides, described front frame is between the described back stay of both sides, and described sliding part is pivotally connected on described upper strut.

3. Folding trolley according to claim 2, is characterized in that: the bottom of the described back stay of both sides has been permanently connected lower supporting rod, is connected on described lower supporting rod to the posterior rotation of described bottom bracing frame.

4. Folding trolley according to claim 2, is characterized in that: described connecting rod is opening up U-shaped bar, and the upper end of the dual-side of described connecting rod is pivotally connected on described push rod respectively.

5. Folding trolley according to claim 4, is characterized in that: described sliding part on described front frame between described connecting rod and described front frame the below of pivot connection point.

6. the Folding trolley according to claim 2 or 4, is characterized in that: described push rod is opening U-shaped bar forward, and the lower end of the dual-side of described push rod is connected with the described back stay phase pivot of both sides respectively.

7. Folding trolley according to claim 2, is characterized in that: described back stay is bottom-up to turn forward, and bends backward at top place and extend to form a junction, and the lower pivot of described push rod is connected to the upper end of described connecting portion.

8. Folding trolley according to claim 1, is characterized in that: described sliding part is can slide up and down to be set in the sliding sleeve on described front frame.

9. Folding trolley according to claim 1, is characterized in that: described lockout mechanism is be located at the locking piece for both being locked between described sliding part and described front frame.

10. Folding trolley according to claim 9, is characterized in that: the top of described front frame is also provided with the unlock piece for unlocking described locking piece.