CN105109538A - Stroller - Google Patents

Abstract

The invention discloses a stroller. A cam sliding block capable of moving up and down along a wheel shaft is arranged on the wheel shaft of each of front wheel assemblies, the bottom end surface of the cam sliding block is an annular cam surface of which one end is low and the other end is high in the radial direction of the wheel shaft, a limiting component for limiting the descending of the cam sliding block is arranged on the wheel shaft, and a tractive component and an elastic component are arranged on the corresponding wheel shaft so as to control the upward moving state and the downward moving state of the cam sliding block. When a vehicle frame is unfolded, the annular cam surfaces are positioned above the limiting components and separated from the limiting components, and the front wheel assemblies can rotate in universal directions; when the vehicle frame is folded, the cam sliding blocks descend so that the annular cam surfaces are abutted to the limiting components, the limiting components slide along the annular cam surfaces from low to high, so that the front wheel assemblies are driven to rotate around the wheel shafts, the front wheel assemblies turn over backwards and are close to the rear wheel assemblies, the structure of the folded vehicle frame is compact, and the size of the folded vehicle frame is effectively reduced.

Description

stroller

technical field

The invention relates to a stroller for children, in particular to a stroller for children whose front wheels can automatically turn when folded.

Background technique

In the prior art, children's strollers usually include a stroller frame with an unfolded state and a folded state, a front wheel assembly located at the bottom front of the stroller frame, and a rear wheel assembly located at the bottom rear of the stroller frame. A rear wheel assembly, a locking mechanism for locking the stroller frame in an unfolded state. When the cart frame is folded, most of the rods on the cart frame can be close together, but because the front wheel assembly usually stretches forward in front of the frame, the front wheel assembly and the rear wheel assembly are often not close together. Together, the volume of the stroller frame after being folded is not compact enough.

Contents of the invention

The object of the present invention is to overcome the disadvantages of the prior art and provide a stroller for children, in which the front wheel assembly can automatically turn to move closer to the rear wheel assembly when it is folded, so as to reduce the volume of the stroller after it is folded.

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

A kind of stroller for children, comprising a foldable vehicle frame, said vehicle frame at least includes a front support and a rear support, said children's stroller also includes a front wheel assembly arranged at the bottom of said front support, a front wheel assembly arranged at the bottom of said rear support The rear wheel assembly at the bottom, the front wheel assembly includes a wheel seat, a front wheel arranged on the wheel seat, fixed on the top of the wheel seat and connected to the bottom of the front bracket so that it can rotate around its own axis The wheel shaft is provided with a cam slider that can move up and down along the wheel shaft. The bottom end surface of the cam slider along the radial direction of the wheel shaft is an annular cam surface with one end low and the other end high. The bottom of the cam slider is also fixedly provided with a limiter for limiting the downward movement of the cam slider, and an elastic member for driving the cam slider downward is provided between the cam slider and the front bracket , the cam slider is connected with a pulling member that can drive the cam slider upward when pulling, and the front bracket is slidably provided with a pulling slider for pulling or releasing the pulling member , when the vehicle frame is unfolded, the pulling slider pulls and tensions the pulling member, the elastic member is compressed, the limiting member is separated from the annular cam surface, and the front wheel assembly Can rotate universally around the wheel shaft; when the frame is folded, the front bracket and the rear bracket move closer to each other, the pulling slider releases the pulling member, and the cam slider is positioned on the elastic member Under the action of moving down the axle, the stopper slides from low to high along the annular cam surface to drive the front wheel assembly to turn backward around the axle and move closer to the rear wheel assembly.

Preferably, the pulling slider is rotatably arranged on the upper part of the front bracket relative to the front bracket, and the upper part of the front bracket is provided with a guide chute for providing sliding guidance for the pulling slider, so The upper part of the rear bracket is provided with a driving slider that can be inserted into the guide chute and is located on one side of the pulling slider. When the rear bracket rotates and expands relative to the front bracket, the driving slider The rear bracket rotates and pushes the pulling slider to slide to tension the pulling member. When the rear bracket rotates and closes relative to the front bracket, the driving slider moves away from the rear bracket with the rotation of the rear bracket. The pulling member is released by sliding in the direction of the pulling slider.

Further, the front support and the rear support are pivotally connected through a rotating shaft, the guide chute is a ring-shaped chute formed by rotating around the axis of the rotating shaft, the pulling slider, The sections of the driving sliders are all arc-shaped.

Preferably, the annular cam surface includes a first cam surface and a second cam surface, the first cam surface spirals clockwise from low to high, and the second cam surface spirals counterclockwise from low to high , the lowest point of the first cam surface is connected to the lowest point of the second cam surface, and the highest point of the first cam surface is connected to the highest point of the second cam surface.

Further, the first cam surface and the second cam surface spiral up 180° around the axis of the axle respectively.

Preferably, the highest point of the annular cam surface is provided with a positioning groove that can be snapped into by the limiting member correspondingly.

Further, the longitudinal section of the positioning groove is V-shaped with the opening facing downward.

Preferably, the limiting member is a cylindrical pin fixedly arranged on the wheel shaft, and the axis of the cylindrical pin and the axis of the wheel shaft are perpendicular to each other.

Preferably, the elastic member is a spring, the upper end of the spring abuts against the bottom of the front bracket, and the lower end of the spring abuts against the cam slider.

As a specific embodiment, the vehicle frame further includes a push rod, a seatpost and a connecting rod, the lower part of the push rod is pivotally connected to the upper part of the front bracket, and the upper part of the rear bracket is pivotally connected to On the front bracket, the rear bracket is also provided with a slider that can slide up and down along it, the front end of the seat post is pivotally connected to the front bracket and the rear end is pivotally connected to the slider. The upper end of the link is pivotally connected to the push rod and the lower end is pivotally connected to the rear of the seatpost or the slider.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: In the children's stroller of the present invention, a cam slider that can move up and down along it is set on the wheel shaft of the front wheel assembly, the cam slider The bottom end surface of the block along the radial direction of the wheel shaft is an annular cam surface with one end low and the other end high, and then a stopper that restricts the downward movement of the cam slider is set on the wheel shaft, and a pulling member and an elastic member are set to control the movement of the cam slider. In the state of up and down movement, when the frame is unfolded, the annular cam surface is located above the limiter and separated from the limiter, and the front wheel assembly can rotate universally; when the frame is folded, the cam slider moves down so that the annular cam surface resists On the limiter, the limiter slides from low to high along the annular cam surface, and then drives the front wheel assembly to rotate around its axle, so that the front wheel assembly turns backward and gets closer to the rear wheel assembly, which makes the frame folded The structure is more compact, effectively reducing the volume of the frame after folding.

Description of drawings

Accompanying drawing 1 is the perspective view of the children's stroller of the present invention in the unfolded state;

Accompanying drawing 2 is the schematic diagram of the installation and connection of the front wheel assembly and the front bracket on the children's stroller of the present invention;

Accompanying drawing 3 is the front view structure diagram of the front wheel assembly on the children's stroller of the present invention;

Accompanying drawing 4 is the side view structure diagram of the front wheel assembly on the children's stroller of the present invention;

Accompanying drawing 5 is the rear view structure diagram of the front wheel assembly on the children's stroller of the present invention;

Accompanying drawing 6 is the schematic diagram of the installation structure of the pulling slider on the children's stroller of the present invention;

Accompanying drawing 7 is the perspective view of the children's stroller of the present invention in a half-folded state;

Accompanying drawing 8 is the flip schematic diagram of the front wheel assembly when the stroller is in the half-folded state;

Accompanying drawing 9 is the perspective view of the children's stroller in the folded state of the present invention;

Among them: 1. Front bracket; 2. Rear bracket; 3. Front wheel assembly; 31. Wheel base; 32. Front wheel; 33. Wheel axle; 4. Rear wheel assembly; 5. Cam slider; 5a, First cam surface ; 5b, second cam surface; 5c, positioning groove; 6, limit piece; 7, elastic piece; 8, pulling piece; 9, pulling slider; 10, guiding chute; 11, driving slider; 12 , rotating shaft; 13, push rod; 14, seat post; 15, sliding member; 16, connecting rod.

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 children's stroller shown in each accompanying drawing, the children's stroller includes a foldable vehicle frame, the vehicle frame at least includes a front support 1 and a rear support 2, wherein the upper part of the rear support 2 is pivotally connected to the front support 1, The stroller also includes a front wheel assembly 3 located at the bottom of the front support 1 and a rear wheel assembly 4 located at the bottom of the rear support 2 . When the vehicle frame is unfolded, the front bracket 1 and the rear bracket 2 are relatively expanded, and the front wheel assembly 3 and the rear wheel assembly 4 are jointly supported on the ground;

In this embodiment, the vehicle frame also includes a push rod 13, a seat post 14 and a connecting rod 16. The lower part of the push rod 13 is pivotally connected to the upper part of the front bracket 1, and the rear bracket 2 is also provided with a Sliding slider 15, the seat post 14 extends in the front-rear direction, the front end of the seat post 14 is pivotally connected to the front bracket 1, and the rear end of the seat post 14 is pivotally connected to the slider 15; the link 16 extends in the up-down direction , the upper end of the connecting rod 16 is pivotally connected to the push rod 13 , and the lower end of the connecting rod 16 is pivotally connected to the rear end of the seat post 14 or is pivotally connected to the slider 15 . A locking mechanism for locking the vehicle frame in the unfolded state can be provided between the slider 15 and the rear bracket 2 . When the vehicle frame is folded, the locking mechanism is unlocked, the push rod 13 is turned back, and the slider 15 slides down along the rear bracket 2, which will drive the front bracket 1, the rear bracket 2, the push rod 13, the seat post 14 and the connecting rod 16 to move closer together. .

2 to 6, the front wheel assembly 3 includes a wheel base 31, a front wheel 32 mounted on the wheel base 31, fixed on the top of the wheel base 31 and connected to the front bracket 1 so as to be rotatable around its own axis. Axle 33 at the bottom. The wheel shaft 33 is sheathed with a cam slider 5 that can move up and down along it, and the wheel shaft 33 is rotatably set relative to the cam slider 5 . The bottom end surface of the cam slider 5 is an annular cam surface with one end lower and the other end high along the radial direction of the wheel shaft 33. The wheel shaft 33 is also fixedly provided with a stopper 6 for limiting the downward movement of the cam slider 5. 6 is located below the cam slider 5 on the axle 33. An elastic member 7 for driving the cam slider 5 to go down is provided between the cam slider 5 and the front bracket 1, and the cam slider 5 is connected with a pulling member 8 that can drive the cam slider 5 to go up when pulling, and the front bracket 1 is slidably provided with a pulling slider 9 for pulling or releasing the pulling member 8. By controlling the sliding state of the pulling slider 9, the pulling or releasing of the pulling member 8 is controlled.

Referring to Fig. 2 to Fig. 6, in this embodiment, the annular cam surface on the bottom surface of the cam slider 5 includes a first cam surface 5a and a second cam surface 5b, and the first cam surface 5a is edged from low to high. The clockwise spiral rises, the second cam surface 5b spirals counterclockwise from low to high, and the lowest point of the first cam surface 5a is connected with the lowest point of the second cam surface 5b, and the highest point of the first cam surface 5a is in contact with the bottom of the second cam surface 5b. The highest points of the second cam surfaces 5b are in contact with each other. Here, the first cam surface 5 a and the second cam surface 5 b spirally rise 180° around the axis of the wheel shaft 33 , thus forming an annular cam surface. The limiting member 6 is a straight pin, and the axis line of the straight pin is perpendicular to the axis line of the wheel shaft 33 . What the elastic member 7 adopts is a spring, the upper end of the spring resists the bottom of the front bracket 1 , and the lower end of the spring resists the cam slider 5 . What the pulling member 8 adopts is a pulling cable, and the two ends of the pulling cable are connected to the pulling slider 9 and the cam slider 5 respectively.

In this embodiment, the pulling slider 9 is arranged at the rotational joint position where the front support 1 and the rear support 2 are rotatably connected. Referring to Fig. 2 and Fig. 6, the pulling slider 9 is rotatably arranged on the upper part of the front bracket 1 relative to the front bracket 1, and the upper part of the front bracket 1 is provided with a guide chute 10 for providing sliding guidance of the pulling slider 9 , the top of the rear bracket 2 is provided with a driving slider 11 that can be inserted into the guide chute 10 and is located on one side of the pulling slider 9. When the rear bracket 2 rotates and unfolds relative to the front bracket 1, the driving slider 11 follows the bracket 2 Rotate to slide toward the pulling slider 9, thereby pushing the pulling slider 9 to slide along the guide chute 10, and then tensioning the pulling member 8 to provide the driving force required for the upward movement of the cam slider 5. When the rear bracket 2 rotates and draws in relative to the front bracket, the drive slider 11 then rotates the bracket 2 and slides in a direction away from the pulling slider 9, so that the pulling slider 9 is no longer subjected to thrust, and the pulling member 8 were released.

Here, the front support 1 and the rear support 2 are pivotally connected by the rotating shaft 12, as shown in FIG. 9 and the driving slider 11 have arc-shaped cross-sections, and the pulling slider 9 and the driving slider 11 are both matedly inserted into the above-mentioned ring-shaped chute.

In this way, when the vehicle frame is unfolded, the front bracket 1 and the rear bracket 2 are relatively expanded, and the driving slider 11 pushes the pulling slider 9 to slide so that the pulling member 8 is pulled and tensioned, which makes the elastic member 7 compressed, and the cam The slider 5 is located above the limiter 6 under the joint action of the elastic member 7 and the pulling member 8, and the annular cam surface at the bottom end of the cam slider 5 is separated from the limiter 6. At this time, the front wheel assembly 3 It can rotate universally around the wheel shaft 33 relative to the front bracket 1, as shown in FIGS. 1 to 5 .

When the vehicle frame is folded, when the push rod 13 turns back and the slider 15 slides down along the rear bracket 2 to drive the rods on the vehicle frame to gradually move closer, the front bracket 1 and the rear bracket 2 rotate around the rotating shaft 12 and gradually move closer, driving the slider. The block 11 slides toward the direction away from the pulling slider 9, and the pulling slider 9 no longer applies the pulling force of the pulling member 8. At this time, under the elastic force of the elastic member 7, the cam slider 5 moves along the axle 33. Sliding downward, the annular cam surface on the bottom end of the cam slider 5 gradually resists the stopper 6, and under the continuous action of the elastic member 7, the cam slider 5 continues to slide down, so that the stopper 6 slides along the annular cam surface, That is, the limiter 6 slides from low to high along the annular cam surface, so that the front wheel assembly 3 is driven to rotate around the wheel shaft 33 relative to the cam slider 5, and the front wheel assembly 3 is turned over relative to the front bracket 1, as shown in Figure 7, Figure 8 shows. When the limiter 6 slides to the highest position of the annular cam surface, the limiter 6 no longer slides, and the front wheel assembly 3 no longer turns over with respect to the front bracket 1. The wheel assembly 3 and the rear wheel assembly 4 are brought together, as shown in FIG. 9 .

Since the highest point and the lowest point of the annular cam surface at the bottom end of the cam slider 5 are respectively located at the radial ends of the wheel shaft 33, like this, when the vehicle frame is completely folded, the angle at which the front wheel assembly 3 rotates around the wheel shaft 33 is 180°. Viewed from the side of the vehicle frame, the front wheel 32 on the front wheel assembly 3 and the rear wheel on the rear wheel assembly 4 are at least partially superimposed together, as shown in Figure 9, thus greatly reducing the size of the vehicle frame. The folded volume.

Referring to FIG. 5 , the highest part of the annular cam surface is also provided with a positioning groove 5c for corresponding engagement of the stopper 6 , and the longitudinal section of the positioning groove 5c is V-shaped with the opening facing downward. In this way, after the front wheel assembly 3 is turned over 180° during the folding process of the vehicle frame, the stopper 6 reaches the highest point of the annular cam surface, and the stopper 6 is snapped into the positioning groove 5c, so that the front wheel assembly 3 no longer Turn over, so that the front wheel assembly 3 is fixed relative to the front bracket 1 and is in a stable state after the vehicle frame is folded.

In summary, in the children's stroller of the present invention, the front wheel assembly 3 can automatically turn backwards and move closer to the rear wheel assembly 4 when the frame is folded, so that the folded structure of the frame is more compact, effectively reducing the The folded volume of the frame has a simple structure and is very convenient to operate.

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 children trolley, comprise folding vehicle frame, described vehicle frame at least comprises front frame, after poppet, described children trolley also comprises the front component be located at bottom described front frame, be located at the wheel assembly bottom described after poppet, it is characterized in that: described front component comprises wheel seat, be located at the front-wheel on described wheel seat, be fixedly arranged on described wheel seat top and wheel shaft bottom described front frame can be connected to rotatably around Pivot Point Center line, described wheel shaft is arranged with can along the cam slide of its up-and-down movement, the bottom face of described cam slide is the high convex annular wheel face in low one end, one end along the radial direction of described wheel shaft, the below described wheel shaft being positioned at described cam slide is also fixedly provided with for limiting the descending locating part of described cam slide, be provided with for ordering about the descending elastic component of described cam slide between described cam slide and described front frame, described cam slide is connected with and can orders about the up drawing piece of described cam slide when lifting, described front frame is provided with slidably the traction sliding block for lifting or discharge described drawing piece,

When described vehicle frame launches, drawing piece described in the tensioning of described traction sliding block tractive, described elastic component is compressed, and described locating part and described convex annular wheel face are separated, and described front component can around described wheel shaft universal rotational; When described vehicle frame folding, described front frame and after poppet are drawn close mutually, described traction sliding block discharges described drawing piece, described cam slide is descending along described wheel shaft under the effect of described elastic component, and described locating part slides from low to high along described convex annular wheel face and orders about described front component and turns over around described wheel shaft and then draw close mutually with described wheel assembly.

2. children trolley according to claim 1, it is characterized in that: described traction sliding block can be located at the top of described front frame by relatively described front frame rotatably, the top of described front frame is provided with the guide chute for providing described traction sliding block slide-and-guide, the top of described after poppet is provided with can insert described guide chute and the driving slide block being positioned at described traction sliding block side, when the relatively described front frame rotary expansion of described after poppet, described driving slide block rotates with described after poppet and promotes described traction sliding block to slide and drawing piece described in tensioning, when described after poppet rotates gathering relative to described front frame, described driving slide block rotates with described after poppet and slides towards the direction away from described traction sliding block and described drawing piece is released.

3. children trolley according to claim 2, it is characterized in that: described front frame is connected by rotating shaft phase pivot with described after poppet, described guide chute is the circular ring type chute rotated around the axial line of described rotating shaft, and the cross section of described traction sliding block, described driving slide block is all curved.

4. children trolley according to claim 1, it is characterized in that: described ring cam set face comprises the first camming surface and the second camming surface, described first camming surface rises along clock wise spirals from low to high, described second camming surface rises along counter-clockwise helical from low to high, the lowest part of described first camming surface connects with the lowest part of described second camming surface, and the highest point of described first camming surface connects with the highest point of described second camming surface.

5. children trolley according to claim 4, is characterized in that: described first camming surface, the second camming surface are respectively around the axial line spiral 180 ° of described wheel shaft.

6. children trolley according to claim 1, is characterized in that: the highest point of described convex annular wheel face is provided with the positioning groove snapped in can supplying described locating part corresponding matching.

7. children trolley according to claim 6, is characterized in that: the longitudinal cross-section of described positioning groove is downward opening V-shape.

8. children trolley according to claim 1, is characterized in that: described locating part is be located at the straight pin on described wheel shaft regularly, and the axial line of described straight pin is mutually vertical with the axial line of described wheel shaft.

9. children trolley according to claim 1, is characterized in that: described elastic component is spring, and the upper end of described spring is kept out in the bottom of described front frame, and the lower end of described spring is kept out on described cam slide.

10. according to the arbitrary described children trolley of claim 1 to 9, it is characterized in that: described vehicle frame also comprises push rod, seat bar and connecting rod, the bottom of described push rod is connected with the top phase pivot of described front frame, the upper pivot of described after poppet is connected on described front frame, described after poppet is also provided with the sliding part that can slide up and down along it, the front end of described seat bar is pivotally connected on described front frame and its rear end and is pivotally connected on described sliding part, the upper end of described connecting rod is pivotally connected on the rear portion or described sliding part that on described push rod and its lower end is pivotally connected in described seat bar.