CN105197087B - Children trolley - Google Patents

Abstract

The invention discloses a stroller for children, in which a cam slider which can move up and down along the wheel shaft of the front wheel assembly is arranged, and the top end surface of the cam slider along the radial direction of the wheel shaft is in the form of an annular shape with one end lower and the other end high The cam surface, and then set a limit piece on the wheel shaft to limit the upward movement of the cam slider, and set a pulling piece and an elastic piece to control the up and down motion state of the cam slider. When the frame is unfolded, the pulling piece and the elastic piece are released, the annular cam surface is located under the limiter and separated from the limiter, and the front wheel assembly can rotate universally; when the frame is folded, the pulling member is gradually tensioned to make the cam slider go up so that the ring cam The surface resists on the limit piece, and the limit piece slides from high to low along the annular cam surface, and then drives the front wheel assembly to rotate around its axle, so that the front wheel assembly turns back and moves closer to the rear wheel assembly, which makes the frame The folded structure is more compact, effectively reducing the folded volume of the vehicle frame.

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 child stroller also includes a front wheel assembly arranged at the bottom of said front support, a front wheel assembly arranged at said rear support The rear wheel assembly at the bottom, the front wheel assembly includes a wheel base, a front wheel arranged on the wheel base, and a wheel shaft fixed on the top of the wheel base, and the wheel shaft is connected to the At the bottom of the front bracket, the wheel shaft is sleeved with a cam slider that can move up and down along it, and the top 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 upper part of the cam slider on the wheel shaft is also fixedly provided with a limit piece for limiting the upward movement of the cam slider, and a stopper for driving the cam slider downward elastic member, the cam slider is connected with a pulling member that can drive the cam slider upward when pulling, and the frame is slidably provided with a pulling member for pulling or releasing the pulling member Pull the slider, when the vehicle frame is unfolded, the pull slider releases the pulling member, the elastic member is released, the annular cam surface at the top of the cam slider and the stopper Separated from each other, the front wheel assembly can rotate universally around the wheel shaft; when the vehicle frame is folded, the front bracket and the rear bracket move closer to each other along the front and rear directions, and the pulling slider is stretched and tensioned. The pulling member, the elastic member is compressed, the cam slider overcomes the elastic force of the elastic member and moves upward along the axle, the limiting member resists the annular cam surface and moves along the annular The cam surface slides from high to low, thereby driving the front wheel assembly to turn backwards around the axle and close to the rear wheel assembly.

Preferably, the pulling slider is slidably arranged on the front bracket along the length extension direction of the front bracket, and when the front bracket is unfolded relative to the rear bracket, the pulling slider moves along the The front bracket slides up to release the pulling member; when the front bracket is folded relative to the rear bracket, the pulling slider slides down along the front bracket to tension the pulling member.

Further, the vehicle frame further includes a connecting frame extending in the front-rear direction, the front end of the connecting frame is pivotally connected to the front bracket, and the rear end of the connecting frame is pivotally connected to the rear bracket, The frame is also provided with a connecting rod, one end of the connecting rod is pivotally connected to the connecting frame, and the other end of the connecting rod is pivotally connected to the pulling slider. When the frame is unfolded, the connecting frame is supported between the front bracket and the rear bracket along the front-rear direction; when the frame is folded, the connecting frame drives the front bracket and the rear bracket to be folded along the front-back direction The connecting rod rotates relative to the connecting frame to drive the pulling slider to slide down the front bracket so as to tension the pulling member.

Furthermore, the front end of the connecting frame is pivotally connected to the front bracket through a first shaft, the pulling slider is slidably arranged in the rod cavity of the front bracket, and the front bracket is located on the front bracket. A chute extending in the up and down direction is provided below the first shaft, one end of the connecting rod is pivotally connected to the connecting frame, and the other end of the connecting rod is connected to the pulling slider through the second shaft. are pivotally connected, and the second shaft is slidably inserted in the slide slot.

As a specific implementation, the vehicle frame further includes a push rod, the upper part of the front support is pivotally connected to the lower part of the push rod, and the upper part of the rear support is pivotally connected to the push rod , A four-bar linkage mechanism is formed between the push rod, the front bracket, the rear bracket and the connecting frame.

Preferably, the annular cam surface includes a first cam surface and a second cam surface, the first cam surface spirals down from high to low in a clockwise direction, and the second cam surface spirals down in a counterclockwise direction from high to low , 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 descend spirally by 180° around the axis of the axle respectively.

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.

Preferably, there are two groups of rear wheel assemblies, and these two groups of rear wheel assemblies are respectively arranged on the left and right sides of the rear bracket, and when the vehicle frame is folded, the front wheel assemblies turn backward by 180° And gather between the described rear wheel assemblies on both sides.

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 top 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 limit piece that restricts the upward movement of the cam slider is set on the wheel shaft, and a pulling piece and an elastic piece are set to control the movement of the cam slider. In the state of up and down movement, when the frame is unfolded, both the pulling member and the elastic member are released, the annular cam surface is located under the limiter and separated from the limiter, and the front wheel assembly can rotate universally; when the frame is folded, The pulling member is gradually tensioned to make the cam slider go up so that the annular cam surface is against the limiter, and the limiter slides from high to low along the annular cam surface, thereby driving the front wheel assembly to rotate around its axle, so that the front wheel The assembly is turned backwards to be close to the rear wheel assembly, which makes the structure of the folded vehicle frame more compact and effectively reduces the volume of the folded vehicle frame.

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

Accompanying drawing 6 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; 6, elastic member; 7, pulling member; 8, limiting member; 9, pulling slider; 10, connecting frame; 11, connecting rod; 12, push rod; One shaft; 14, the chute; 15, the second shaft.

detailed description

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

Referring to Fig. 1 to Fig. 6, a kind of stroller for children includes a foldable vehicle frame, the vehicle frame at least includes a front support 1 and a rear support 2, and the children's stroller also includes front wheels arranged at the bottom of the front support 1 Component 3, the rear wheel component 4 arranged at the bottom of the rear bracket 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;

Referring to the accompanying drawings, in this embodiment, the vehicle frame also includes a connecting frame 10 and a push rod 12. The connecting frame 10 extends along the front and rear directions. The front end of the connecting frame 10 is pivotally connected to the front bracket 1. The connecting frame 10 The rear end pivot is connected on the rear bracket 2, the bottom of the push rod 12 is pivotally connected with the top of the front bracket 1, and the upper part of the rear bracket 2 is pivotally connected on the push rod 12, so that the front bracket 1, the rear bracket 2. A four-bar linkage mechanism is formed between the connecting frame 10 and the push rod 12 . When the vehicle frame is folded, the push rod 12 will turn back and will drive the front bracket 1, the rear bracket 2, the connecting frame 10 and the push rod 12 to rotate mutually and gradually move closer together.

1 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 top end surface of the cam slider 5 along the radial direction of the wheel shaft 33 is an annular cam surface with one end lower and the other end higher. The wheel shaft 33 is also fixedly provided with a limiting member 8 for limiting the upward movement of the cam slider 5 , and the limiting member 8 is located above the cam slider 5 on the wheel shaft 33 . An elastic member 6 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 7 that can drive the cam slider 5 to go up when pulling. A pulling slider 9 for pulling or releasing the pulling member 7 is slidably arranged on the upper side, and the pulling or releasing of the pulling member 7 is controlled by controlling the sliding state of the pulling slider 9 .

Referring to Fig. 2 to Fig. 4, in this embodiment, the annular cam surface on the top 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 oriented from high to low. The clockwise spiral descends, the second cam surface 5b descends counterclockwise from high to low, and the highest point of the first cam surface 5a meets the highest point of the second cam surface 5b, and the lowest point of the first cam surface 5a and The lowest points of the second cam surfaces 5b are in contact. Here, the first cam surface 5 a and the second cam surface 5 b spiral down 180° around the axis of the wheel shaft 33 , thus forming an annular cam surface. In this way, the highest point and the lowest point of the annular cam surface on the top end of the cam slider 5 are respectively located at the radial ends of the wheel shaft 33 .

Here, the limit pin 8 is a cylindrical pin, and the axis of the cylindrical pin 8 is perpendicular to the axis of the axle 33 . The elastic member 6 is a spring, specifically a compression spring. The upper end of the compression spring is against the bottom of the front bracket 1 , and the lower end of the compression spring is against the cam slider 5 . What the pulling member 7 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, wherein the pulling member 7 is connected to this end of the pulling slider 9 and is wound to form a U-shaped, when the pulling slider 9 slides down, the pulling member 7 will be tensioned, and when the pulling slider 9 slides upwards, the pulling member 7 will be relaxed.

Referring to FIGS. 1 , 2 , 5 and 6 , in this embodiment, the pulling slider 9 is provided on the front bracket 1 so as to slide along the length extension direction of the front bracket 1 . The vehicle frame is also provided with a connecting rod 11, one end of the connecting rod 11 is pivotally connected on the connecting frame 10, and the other end of the connecting rod 11 is pivotally connected on the pulling slider 9, that is, the connecting rod 11, the connecting frame 10 , A slider crank mechanism is formed between the front bracket 1 and the pulling slider 9 . When the vehicle frame is unfolded, the connecting frame 10 is supported between the front bracket 1 and the rear bracket 2 along the front-rear direction; 11 rotates relative to the connecting frame 10, thereby driving the pulling slider 9 to slide down along the front bracket 1, and then tensioning the pulling member 7. Specifically, referring to FIG. 2 , the pulling slider 9 is slidably disposed in the rod chamber of the front bracket 1 . The front end of the connecting frame 10 is pivotally connected to the front bracket 1 through the first shaft 13, the pulling slider 9 is slidably arranged in the rod chamber of the front bracket 1, and the front bracket 1 is provided with an edge along the bottom of the first shaft 13. The chute 14 extending in the up and down direction, one end of the connecting rod 11 is pivotally connected to the connecting frame 10, and the other end of the connecting rod 11 is pivotally connected with the pulling slider 9 through the second shaft 15, and the second shaft 15 can Slide up and down through the chute 14 .

In this way, when the vehicle frame is unfolded, the rods on the vehicle frame are all mutually expanded, the front bracket 1 and the rear bracket 2 are deployed along the front-to-back direction, and the connecting frame 10 is supported between the front bracket 1 and the rear bracket 2 along the front-to-back direction, so that The pulling slider 9 moves upwards driven by the connecting rod 11, thereby releasing the pulling member 7, so that the elastic member 6 is released. Under the action of the downward elastic pressure of the elastic member 6, the cam slider 5 descends so that the annular cam surface at its top is separated from the stopper 8. At this time, the cam slider 5 does not affect the operation of the front wheel assembly 3. That is, the front wheel assembly 3 can rotate universally around the wheel shaft 33 relative to the front bracket 1 , as shown in FIGS. 1 to 4 .

When the vehicle frame is folded, the push rod 12 is turned backward so that the front bracket 1, the rear bracket 2, the connecting frame 10 and the push rod 12 gradually move closer together. , the connecting frame 10 turns around the first axis 13 relative to the front frame 1 and moves closer, so that the connecting rod 11 rotates relative to the connecting frame 10 and drives the pulling slider 9 to gradually slide down along the front frame 1, which makes the pulling member 7 gradually stretched tight. Under the pulling force of the pulling member 7, the cam slider 5 overcomes the elastic force of the elastic member 6 and gradually moves upward, and the annular cam surface at the top of the cam slider 5 gradually resists the stopper 8, and the pulling Under the action of the continuous pulling force of part 7, the cam slider 5 continues to slide up, so that the limiter 8 slides along the annular cam surface, that is, the limiter 8 slides from high to low along the annular cam surface, thus driving the front wheel The assembly 3 rotates around the wheel shaft 33 relative to the cam slider 5 to realize the flipping of the front wheel assembly 3 relative to the front bracket 1 , as shown in FIG. 5 .

Finally, until the vehicle frame is completely folded and the pulling slider 9 does not continue to slide down, the front wheel assembly 3 no longer overturns relative to the front bracket 1, and the stopper 8 slides to the lowest position of the annular cam surface, realizing the front wheel assembly. 3. Turn over 180° backwards and move closer together with the rear wheel assembly 4. As shown in Figure 6, there are two groups of rear wheel assemblies 4, and these two groups of rear wheel assemblies are respectively arranged at the bottom of the left and right sides of the rear bracket 2. When the vehicle frame is completely folded, the front wheel assemblies 3 are turned backward by 180° and folded. Between the rear wheel assemblies 4 on both sides, that is, 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 6 As shown, this greatly reduces the volume of the frame after folding.

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 kind of children trolley, including folding vehicle frame, the vehicle frame at least include fore-stock and after-poppet, the children push away Car also includes front component, the wheel assembly located at the after-poppet bottom located at the fore-stock bottom, it is characterised in that： The front component includes wheel seat, the front-wheel on the wheel seat, the wheel shaft being fixedly arranged at the top of the wheel seat, and the wheel shaft can Being pivotally connected to be arranged with the fore-stock bottom, the wheel shaft around Pivot Point Center line can slide along the cam of its up and down motion Block, the radial direction of the top end face of the cam slide along the wheel shaft is in the high convex annular wheel face in the low one end in one end, on the wheel shaft The locating part up for limiting the cam slide is also fixedly provided with positioned at the top of the cam slide, the cam is slided Being provided between block and the fore-stock is used to driving that be connected with the descending elastic component of the cam slide, the cam slide can Driving slidably to be provided with the up drawing piece of the cam slide, the vehicle frame in lifting is used to lifting or discharging described lead The traction sliding block of draw piece,

When the vehicle frame deploys, the traction sliding block discharges the drawing piece, and the elastic component is released, the cam slide The convex annular wheel face and the locating part on top are separated, and the front component can be around the wheel shaft universal rotational；Work as institute When stating vehicle frame folding, the fore-stock is mutually drawn close along the longitudinal direction with the after-poppet, the traction sliding block drawing tensioning institute Drawing piece is stated, the elastic component is compressed, the cam slide overcomes the elastic force of the elastic component up along the wheel shaft, institute State locating part to keep out on the convex annular wheel face and slide from high to low along the convex annular wheel face, and then drive the front-wheel Component is turned over around the wheel shaft and mutually drawn close with the wheel assembly.

2. children trolley according to claim 1, it is characterised in that：Length of the traction sliding block along the fore-stock is prolonged Direction is stretched slidably on the fore-stock, when the fore-stock after-poppet expansion relatively, the traction sliding block edge Slided on the fore-stock and discharge the drawing piece；When the relatively described after-poppet of the fore-stock is drawn in, the traction sliding block Glided along the fore-stock and be tensioned the drawing piece.

3. children trolley according to claim 2, it is characterised in that：The vehicle frame also includes the company extended along the longitudinal direction Frame is connect, the front end of the link is pivotally connected on the fore-stock, and the rear end of the link is pivotally connected in the rear On support, connecting rod is additionally provided with the vehicle frame, the provided at one of the connecting rod is connected on the link, the connecting rod it is another Provided at one is connected on the traction sliding block, when the vehicle frame deploys, and the link is supported on described along the longitudinal direction Between fore-stock and the after-poppet；When the vehicle frame folding, the link drives the fore-stock with after-poppet before Rear is to gathering, and the connecting rod rotates relative to the link and drives the traction sliding block to glide and then open along the fore-stock The tight drawing piece.

4. children trolley according to claim 3, it is characterised in that：The front end of the link is connected by first axle pivot It is connected on the fore-stock, the traction sliding block slidably in the rod cavity of the fore-stock, is located at institute on the fore-stock State and vertically extending chute is offered below first axle, the provided at one of the connecting rod is connected to the link On, the other end of the connecting rod is connected by the second axle with the traction sliding block phase pivot, and second axle is slidably plugged in In the chute.

5. children trolley according to claim 3, it is characterised in that：The vehicle frame also includes push rod, the fore-stock Top is connected with the bottom phase pivot of the push rod, and the upper pivot of the after-poppet is connected on the push rod, the push rod, Quadric chain is constituted between fore-stock, after-poppet and link.

6. children trolley according to claim 1, it is characterised in that：The ring cam set face includes the first cam surface and the Two cam surfaces, first cam surface declines along clock wise spirals from high to low, and second cam surface is from high to low along the inverse time Pin spiral declines, and the lowest part of first cam surface connects with the lowest part of second cam surface, first cam surface Highest point connect with the highest point of second cam surface.

7. children trolley according to claim 6, it is characterised in that：First cam surface, the second cam surface rotating around The axial line spiral of the wheel shaft declines 180 °.

8. children trolley according to claim 1, it is characterised in that：The locating part is regularly to be located on the wheel shaft Straight pin, the axial line of the axial line of the straight pin and the wheel shaft is mutually perpendicular to.

9. children trolley according to claim 1, it is characterised in that：The elastic component is spring, the upper end of the spring Keep out in the bottom of the fore-stock, the lower end of the spring is kept out on the cam slide.

10. children trolley according to claim 1, it is characterised in that：The wheel assembly has two groups, described in this two groups after Wheel assembly is respectively arranged on the left and right sides of the after-poppet, when the vehicle frame folding, and the front component is turned over 180 ° And draw between wheel assembly described in both sides.