CN103448777A - Folding pedal structure - Google Patents

Abstract

The invention relates to a foldable pedal structure, which is arranged on a pushcart including a front wheel bracket and a rear wheel bracket. The board includes the middle piece of the pedal, the two connecting pieces of the pedal connected to the two ends of the middle piece of the pedal, and the two fixing pieces of the pedal respectively connected to the two connecting pieces of the pedal; It has a folded state and an open state. In the folded state, the pedal fixing piece, the pedal connecting piece, and the pedal middle piece are in the shape of a "several" and the pedal middle piece is in the first position. In the open state, The pedal connecting piece rotates to drive the pedal middle piece to move to the second position; two traction cables are connected to the bottom cross brace, one end of the traction rope is connected with the brace, and the other end is connected with the pedal connecting piece. The invention adopts the traction cable to drive the folding pedal to maintain the unfolded state without adduction, which is convenient for the application of the pushcart.

Description

A folding pedal structure

technical field

The invention relates to a folding pedal structure applied to a folding stroller for children.

Background technique

Existing foldable strollers usually have a foldable frame, such as the one disclosed in Patent No. 200920189361.X. Usually, a pedal composed of several parts connected in rotation is set between two front wheel brackets. The pedal is in a folded state when the frame is folded and is in an unfolded state when the frame is in an unfolded state. However, a defect of the existing foldable pedal structure is that when the pedal is used in an unfolded state, the pedal will be retracted in a tendency to return to the folded state, so that the two front wheel brackets Non-parallel, which in turn leads to the problems of the wheels being tilted and the rigidity of the frame poor, which brings certain hidden dangers to the use of the stroller.

Contents of the invention

The purpose of the present invention is to provide a foldable pedal structure that can avoid retraction when unfolded.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A foldable pedal structure, which is set on a trolley, and the trolley includes a pair of front wheel brackets on which front wheels are installed, and a pair of front wheel brackets on which rear wheels are installed and correspondingly connected to the same side of the front wheel brackets. For the rear wheel bracket, the rear wheel bracket is connected with a bottom cross brace composed of two brackets that are rotatably connected. The pedal, the folded pedal includes a middle piece of the footboard, two connecting pieces of the footboard respectively symmetrically and rotationally connected to the two ends of the middle piece of the footboard, respectively connected with the two said The two pedal fixing pieces that are rotatably connected to the pedal connecting piece, the two pedal fixing pieces are respectively fixedly arranged on a pair of the front wheel brackets, the middle piece of the pedal, The pedal connecting piece and the pedal fixing piece rotate relatively in the horizontal plane; the folded pedal has a folded state and an unfolded state, and in the folded state, the pedal The plate fixing piece, the pedal connecting piece, and the middle piece of the pedal are in the shape of a "several" and the middle piece of the pedal is in the first position. In the open state, the The pedal connecting piece rotates along the unfolding direction to drive the middle piece of the pedal to move to the second position, and the distance between the first position and the fixing piece of the pedal is larger than the first position The distance between the two positions and the said pedal fixing piece; the two said braces of the bottom cross brace are respectively connected to make the folded pedal turn from the folded state to For the two traction cables in the open state, one end of the traction cables is connected to the support bracket, and the other end is connected to the pedal connecting piece.

Preferably, the rotation point of the pedal connecting piece and the pedal fixing piece is rotatably connected to divide the pedal connecting piece into a rear part of the connecting piece close to the bottom cross brace. and away from the front part of the connecting piece of the bottom cross brace; the turning point of the rotation connection between the two braces of the bottom cross brace divides the brace into a section close to the foldable pedal The front part of the bracket of the board and the rear part of the bracket far away from the folding pedal; the front part of the bracket located on the same side and the front part of the connecting piece are passed through a traction cable connected.

Preferably, the traction cable is connected to the front side of the connecting piece facing the front side of the deployment steering.

Preferably, when the folded footrest is in the folded state, the middle piece of the footrest is located behind the fixing piece of the footrest.

Preferably, a limit stopper is provided on the fixed piece of the footboard, and when the folded footboard is in the open state, the connecting piece of the footboard rotates along the unfolding direction to reach on the limit stop.

Preferably, a torsion spring is provided at the turning point between the pedal fixing piece and the middle piece of the pedal.

"Front" and "rear" in this application mean that when the cart is placed on the ground, the direction where the front wheels are located is "front", and the direction where the rear wheels are is "rear".

The working principle of the present invention is: when the cart in the folded state is opened to the open state, the rear wheel brackets on the left and right sides of the cart are far away from each other, thereby driving the two braces of the bottom cross to rotate around their rotationally connected pivot points, Because one end of the brace is connected with the rear wheel bracket, so this time the other end of the brace moves backwards with the opening of the bottom cross brace, and pulls the traction cable backwards. And the traction cable is connected with the pedal connecting piece and pulls it to rotate along the unfolding direction, and the middle piece of the pedal is moved towards the direction of the pedal fixing piece by the rotation of the pedal connecting piece until reaching an open state. At this time, the traction cable is tightened and has a traction effect on the pedal connecting piece, which can prevent the pedal connecting piece from rotating in the opposite direction to the unfolding direction, that is, avoiding the foldable pedal being retracted and causing the front wheel bracket to be non-parallel.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art: the present invention uses a traction cable linked with the rear wheel bracket to drive the folding pedal to unfold and maintain the unfolded state, which can make the foldable pedal in the unfolded state The board maintains the unfolded state and does not retract, thereby avoiding the problems of non-parallel front wheel brackets, tilted wheels, and poor frame rigidity caused by the retraction of the folding pedals, which is convenient for the application of the cart.

Description of drawings

Accompanying drawing 1 is the schematic diagram that adopts the cart of the present invention.

Accompanying drawing 2 is a schematic top view of a foldable footrest structure of the present invention in a folded state.

Accompanying drawing 3 is a schematic top view of a foldable footrest structure of the present invention in an open state.

Accompanying drawing 4 is the enlarged schematic view of part A of a foldable pedal structure of the present invention.

In the above drawings: 1, front wheel bracket; 2, front wheel; 3, rear wheel bracket; 4, rear wheel; 5, bottom cross brace; 6, support frame; 7, folding pedal; 8, pedal Middle piece; 9, pedal connecting piece; 10, pedal fixing piece; 11, first position; 12, second position; 13, traction rope; 14, limit block; 15, torsion spring.

Detailed ways

The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

Embodiment 1: A foldable footrest structure, which is set on a stroller, as shown in Figure 1 . The stroller comprises a pair of front wheel brackets 1 on which front wheels 2 are installed and a pair of rear wheel brackets 3 on which rear wheels 4 are connected correspondingly to the same side of the front wheel brackets 1 . The stroller has four directions: front, rear, left, and right. The direction close to the front wheel 2 is "front", and the direction close to the rear wheel 4 is "rear". When facing the front of the stroller, the left side of the stroller The direction of the cart is "left", and the direction of the right side of the cart is "right". Therefore, between the front wheel bracket 1 and the rear wheel bracket 3, the front wheel bracket 1 and the rear wheel bracket 3 on the left side of the cart are connected. And the front wheel support 1 on the right side of the cart is connected with the rear wheel support 3. The rear wheel bracket 3 is connected with the bottom cross brace 5 formed by the rotation connection of two braces 6. The rear ends of these two braces 6 are respectively fixedly connected with the rear wheel braces 3 on both sides. When the braces 6 rotate relatively , a pair of rear wheel brackets 3 approach or move away from each other in the left and right direction.

As shown in Figure 2 and Figure 3. The folding pedal structure includes a folding pedal 7 arranged between a pair of front wheel brackets 1 . The foldable pedal 7 includes a pedal intermediate piece 8, two pedal connecting pieces 9 that are respectively symmetrically and rotationally connected to the two ends of the pedal middle piece 8, and are rotationally connected with the two pedal connecting pieces 9 respectively. The two pedal fixing pieces 10 are respectively fixed and arranged on a pair of front wheel brackets 1 by rivets, and between the middle piece 8 of the pedal and the connecting piece 9 of the pedal, the feet The pedal connecting piece 9 and the pedal fixing piece 10 are respectively rotatably connected by rivets, and the pedal middle piece 8, the pedal connecting piece 9, and the pedal fixing piece 10 relatively rotate in the horizontal plane. The folding footboard 7 has a folded state and an opened state. In the folded state, the pedal fixing piece 10 , the pedal connecting piece 9 , and the pedal middle piece 8 are in the shape of “几” and the pedal middle piece 8 is in the first position 11 . A preferred solution is that the middle sheet 8 of the pedal is located behind the fixing sheet 10 of the pedal and the axis lines of the two are parallel. In the open state, the pedal connecting piece 9 rotates along the unfolding direction to drive the pedal intermediate piece 8 to move to the second position 12, and the distance between the first position 11 and the pedal fixing piece 10 is greater than that of the second position. 12 and the distance between the pedal fixing piece 10. A preferred solution is that the middle piece 8 of the footboard at the first position 11 is connected with the connecting piece 9 of the footboard and the fixing piece 10 of the footboard to form an approximate "one" shape.

The two braces 6 of the bottom cross brace 5 are respectively connected with two traction cables 13 that make the folding pedal 7 change from the folded state to the open state. Pedal connecting piece 9 is connected. Concretely, the turning point of the rotatable connection between the pedal connecting piece 9 and the pedal fixing piece 10 divides the pedal connecting piece 9 into the rear part of the connecting piece close to the bottom cross brace 5 and the connection far away from the bottom cross brace 5. The front of the film. The turning point that is rotatably connected between the two braces 6 of the bottom cross brace 5 divides the brace 6 into the brace 6 front portion close to the foldable pedal 7 and the brace 6 rear portion away from the foldable pedal 7 . Located on the same side, that is, the front part of the bracket 6 on the left side or the right side and the front part of the connecting piece are connected by a traction cable 13, and the traction cable 13 is connected on the front part of the connecting piece towards the front of the unfolding steering One side, that is, the pedal connecting piece 9 is turning to that side that its connecting piece front portion will turn to when turning to rotate by launching. In conjunction with accompanying drawing 2, the pedal connecting piece 9 on the left side in FIG. And its pedal front part then rotates to the left side in the figure, so traction cable 13 is connected to the left side of this pedal front part, to pull the pedal connecting piece 9 that is positioned at the left side in the figure and turn to rotate by launching. In the same way, when the pedal connecting piece 9 on the right side in Fig. 2 (actually it should be the pedal connecting piece 9 on the left side of the trolley), when the folding pedal 7 is unfolded, it rotates counterclockwise, while its The pedal front part then rotates to the right side in the figure, so the traction cable 13 is connected to the right side of the pedal front part to pull the pedal connecting piece 9 positioned on the right side in the figure to rotate by launching.

And limit stopper 14 is also arranged on pedal fixed piece 10, when folding pedal 7 is open state, pedal connecting piece 9 rotates along unfolding turning to butt on limit stopper 14.

Therefore, the process of the above-mentioned folding pedal 7 entering the open state from the folded state is as follows: the rear wheel brackets 3 on the left and right sides of the cart are far away from each other, thereby driving the two braces 6 of the bottom cross brace 5 to rotate around the pivot point of connection Rotate, because an end of brace 6 is connected with rear wheel support 3, so the other end of brace 6 moves backward along with the opening of bottom cross brace 5 this moment, and pulls traction cable 13 backwards. And the traction cable 13 is connected with the pedal connecting piece 9 and pulls it to rotate along the unfolding direction, and the pedal middle piece 8 is moved from the first position 11 to the pedal fixing piece 10 by the rotation of the pedal connecting piece 9 . Move in the direction until the pedal connecting piece 9 touches the limit block 14, the pedal middle piece 8 reaches the second position 12, so that the pedal fixing piece 10, the pedal connecting piece 9 and the pedal The board middle piece 8 reaches an approximate "one" shape, so that the folding pedal 7 reaches an open state. At this time, as shown in Figure 3, the traction cable 13 tightens the pedal connecting piece 9 to prevent it from rotating in the opposite direction to the deployment direction. If an external force F or F1 acts on mechanisms such as the front wheel bracket 1, the external force will After the pedal fixing piece 10 and the pedal connecting piece 9, the pedal middle piece 8 is pushed forward, so that the pedal middle piece 8 has a tendency to move forward and it makes the pedal connecting piece 9 have a tendency to continue along its The tendency to rotate in the deployment direction makes the external force act on the limit block 14 . The limit block 14 can prevent the pedal connecting piece 9 from continuing to rotate, thereby enhancing the rigidity of the folding pedal 7 .

In this embodiment, a torsion spring 15 is provided at the turning point between the pedal fixing piece 10 and the pedal middle piece 8 , as shown in FIG. 4 . When the pedal 7 is unfolded and folded, that is, when the connecting piece 9 of the pedal is rotated along its unfolding direction, the torsion spring 15 is elastically deformed to accumulate a pre-torsion force. When the stroller is folded, a pair of rear wheel brackets 3 are close to each other, so that the front part of the bracket 6 connected with the traction cable 13 moves forward, and then the traction cable 13 is loosened and loses the pulling force on the pedal connecting piece 9, Therefore, under the action of the pre-torsion force of the torsion spring 15, turn to the opposite direction of the unfolding direction (that is, the direction shown by the arrow in Figure 4) to release the pre-torsion force, so that the folding pedal 7 can be turned from the open state to the folded state. convert.

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 (6)

1. A foldable pedal structure, which is arranged on a cart, and said cart includes a pair of front wheel brackets equipped with front wheels and rear wheels are installed and correspondingly connected with the same side of said front wheel brackets A pair of rear wheel brackets, the rear wheel brackets are connected with a bottom cross brace composed of two brackets rotatably connected, it is characterized in that: the foldable pedal structure includes a pair of front The foldable pedal between the wheel brackets, the foldable pedal includes a middle piece of the footboard, two connecting pieces of the footboard respectively symmetrically and rotationally connected to the two ends of the middle piece of the footboard, Two pedal fixing pieces that are rotatably connected to the two pedal connecting pieces, the two pedal fixing pieces are respectively fixed on a pair of the front wheel brackets, the The middle piece of the pedal, the connecting piece of the pedal, and the fixing piece of the pedal are relatively rotated in the horizontal plane; the folded pedal has a folded state and an open state, and in the folded state , the pedal fixing piece, the pedal connecting piece, and the pedal middle piece are in the shape of a "several" and the pedal middle piece is in the first position, in the In the open state, the pedal connecting piece rotates along the unfolding direction to drive the middle piece of the pedal to move to the second position, and the distance between the first position and the fixing piece of the pedal is The distance is greater than the distance between the second position and the pedal fixing piece; the two braces of the bottom cross brace are respectively connected to drive the folding pedal by the The folded state is transformed into the two traction cables in the open state, one end of the traction cable is connected with the support bracket, and the other end is connected with the pedal connecting piece. 2. A foldable footrest structure according to claim 1, characterized in that: the pivot point of the rotational connection between the footrest connecting piece and the footrest fixing piece connects the said footrest The pedal connecting piece is divided into the rear part of the connecting piece close to the bottom cross brace and the front part of the connecting piece far away from the bottom cross brace; The pivot point of the connection divides the bracket into the front part of the bracket close to the folding pedal and the rear part of the bracket away from the folding pedal; the front part of the bracket located on the same side The part and the front part of the connecting piece are connected by a said traction cable. 3 . The foldable pedal structure according to claim 2 , wherein the traction cable is connected to the front side of the connecting piece facing the front side of the unfolding turning. 4 . 4. A foldable pedal structure according to claim 1, 2 or 3, characterized in that: when the foldable pedal is in the folded state, the middle piece of the pedal Located at the rear of the pedal fixing piece. 5. A foldable pedal structure according to claim 1, characterized in that: said pedal fixing piece is provided with a limit stopper, when said foldable pedal is in said open state At this time, the pedal connecting piece rotates along the unfolding direction until it abuts against the limit stopper. 6. A foldable footrest structure according to claim 1, characterized in that: a torsion spring is provided at the turning point between the footrest fixing piece and the footrest middle piece.

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