CN203183615U - Collapsible combination golf bag cart - Google Patents

Abstract

The utility model discloses a collapsible combination golf bag cart which comprises the following components: a club containment subassembly which comprises a wheel chamber; a conveying subassembly which comprises a telescopic front wheel subassembly that is connected with the club containment subassembly and a pair of pivotally mounted rear wheel subassembly, wherein the front wheel subassembly is provided with a front wheel, and each rear wheel subassembly is provided with a rear wheel; and an expansion subassembly which is pivotally connected with the front wheel subassembly and the rear wheel assemblies. The collapsible combination golf bag cart has an expanded mode and a compact mode. In the compact mode, the front wheel is provided in the wheel chamber and furthermore the rear wheel subassembly abuts against the bag body; and in the expanded mode, the front wheel is provided outside the wheel chamber and furthermore the rear wheel subassembly is at a backward and outward position relative to the bag body and has a stable rolling wheelspan, and the expansion subassembly is constructed for causing the front wheel subassembly and the rear wheel subassemblies to pivot between the compact mode and the expanded mode. The collapsible combination golf bag cart has high versatility. The collapsible combination golf bag cart can be folded for being used as a golf bag and can be expanded for being used as a golf bag cart.

Description

Collapsible ball car

Technical field

The utility model is broadly directed to the accessory that offers the golfer, and more particularly, relates to collapsible ball car, to be provided for supporting and transporting the method for the employed golf clubs of golf player and accessory.

Background technology

Golf is a kind of well-known motion.For the golfer, need walk about in order to impact Gao Erqiu at the bigger golf course of area usually.Now, when playing golf, in order to carry golf clubs and the related accessory that may use at any time, the golfer need bear the golf bag for golf clubs and related accessory.Be appreciated that bearing golf bag on the bigger golf course of area back and forth is to consume one's strength very much and then may influence the enjoyment that plays golf.Thereby people expect a kind of device that can be convenient for carrying golf clubs and related accessory.

For this reason, people have developed some can conveniently transport the ball car device of golf clubs and related accessory, can carry golf clubs and related accessory so that the golfer conveniently picks up when playing golf by thrust unit thereby these devices have wheel.But these devices generally have the excessive problem of volume.In addition, though these devices have solved the problem of conveniently transporting golf clubs and related accessory when playing golf, but inconvenience is carried golf clubs and related accessory in other occasion.For example, when the golfer has played golf, golf clubs and related accessory need be put into the luggage case of automobile and take away, but these known devices but can not be put into the luggage case of automobile because volume is excessive.Again for example, be under the situation about providing of the management company by golf course at these devices, when the golfer has played golf, management company need put into the warehouse with these devices, but these devices are because volume is excessive and can not fold, thus have floor space big, be difficult for the problem of stacking.Also for example, be under the situation about being bought by golfer oneself at these devices, when may exist some still to need to bear golf clubs and related accessory (for example, when walking stair, may still bear golf clubs and related accessory), and but these devices these devices be because volume is excessive and can not fold, thereby the golfer can not bear these devices easily.

Thereby, expect a kind of can solution of the above problems.

The utility model content

Therefore, a purpose of the present utility model is to provide a kind of combined golf bag and three-wheel ball car, is used for transporting golf clubs and accessory in very firm mode.

Another purpose of the present utility model is to provide folding combined type ball bag and ball truck system, and this system changes between compact (storage) pattern and expansion (operation) pattern easily and rapidly.

Another purpose of the present utility model is to provide combined type ball bag and ball truck system, and this system omits many than ball bag itself on bottom line in occupied luggage case or storage cabinet space when folding.

Another purpose of the present utility model is to provide combined type ball bag and ball truck system, compares the common balance of this system and much stable with the ball truck system with separate type ball bag.

Another purpose of the present utility model is to provide combined type ball bag and ball truck system, and this system has not only wide but also long wheelspan when launching, in order to operate and roll easily.

Another purpose of the present utility model is, and is overhead lower than other ball truck systems when travelling.

Another purpose of the present utility model is to provide combined type ball bag and ball truck system, and this system is suitable for closely being stored in the positions such as golf course ball garage uniquely.

According to an aspect of the present utility model, a kind of collapsible ball car is provided, this collapsible ball car comprises: ball sack assembly comprises the wheel chamber; The transporton assembly comprises the telescopic preceding wheel assembly and a pair of back wheel assembly of installing pivotally that are connected with ball sack assembly, and preceding wheel assembly has front-wheel, and each back wheel assembly all has trailing wheel; And expansion sub-component, preceding wheel assembly and back wheel assembly are pivotally connected in launching sub-component, the ball car has expansion pattern and compact mode, in compact mode, front-wheel be positioned at the wheel chamber among and the back wheel assembly against bag, in the expansion pattern, front-wheel is positioned at outside the wheel chamber and the back wheel assembly is in backward with outside position with respect to bag and has stable scroll wheel distance, launches sub-component and is configured to make front-wheel and back wheel assembly to pivot between compact mode and expansion pattern.

Preferably, the ball car further comprises: handle operatively engages with the back wheel assembly.

Preferably, the ball car further comprises push rod, and push rod is connected between handle and the corresponding back wheel assembly, and push rod is configured to around the pivot of pivot corresponding back wheel assembly be pivoted by handle between compact mode and expansion pattern.

Preferably, back wheel assembly comprises portion extending transversely, cage structure extending transversely become by handle around the pivot of pivot make the back wheel assembly away from or promote near the horizontal direction of bag.

Preferably, back wheel assembly comprises the back leg pivot plate, and the back leg pivot plate is connected between ball sack assembly and the corresponding trailing wheel, and cage structure extending transversely is the lip-deep inclined-plane towards ball sack assembly that is positioned at the back leg pivot plate.

Preferably, the ball car further comprises parallel links, and each back leg pivot plate is all operated collaboratively with corresponding parallel links.

Preferably, the two ends of push rod have globe joint, and push rod is connected to handle and corresponding back wheel assembly by globe joint.

Preferably, back wheel assembly is connected in ball sack assembly at half place of the vertical height of ball sack assembly.

Preferably, the bottom in the place ahead in wheel chamber is provided with preceding pivot, and front-wheel is arranged on the preceding pivot pivotly by support member.

Preferably, preceding wheel assembly and/or back wheel assembly comprise one or more in return element, locking member, the braking member.

Provide a kind of folding combined golf bag and ball car more on the one hand according to of the present utility model, comprising: ball sack assembly comprises the wheel chamber; The transporton assembly comprises telescopic front-wheel and a pair of back leg sub-component of installing pivotally, and each back leg sub-component has a trailing wheel; And the expansion sub-component, be used for described front-wheel be pivoted to described take turns among the chamber and outside, and with described back leg sub-component from pivoting against described bag in order to arrive stable scroll wheel distance backward and outwards from described bag; Wherein said transport and launch sub-component inwardly and forward be folded into compact mode from the expansion pattern.

Preferably, further comprise handle, handle operatively engages with described back leg sub-component.

According to another aspect of the present utility model, a kind of folding combined golf bag and golf truck system are provided, comprising: golf bag spare comprises wheel chamber and a pair of back Pivot joint; Front-wheel is installed on the described golf bag spare pivotally, in order to be retractable into described the wheel in the chamber; A pair of back leg sub-component, each back leg sub-component includes trailing wheel, be attached to corresponding in the described Pivot joint pivotally, make described hired thug assembly and described trailing wheel between compact mode and expansion pattern, to pivot, in described compact mode, described trailing wheel is near the downside of described golf bag spare, and in described expansion pattern, described trailing wheel launches backward and outwards from described golf bag spare; And handle, being installed in pivotally on the described golf bag spare, described handle is connected in each in the described back leg sub-component, changes between described compact mode and described expansion pattern thereby the pivot of described handle makes.

Briefly, a preferred embodiment of the present utility model is the collapsible ball car of combination golf pocket type, and this system has ball sack assembly, is used for supporting golf clubs and accessory; The transporton assembly is used for providing roll capability at golf course; And the expansion sub-component, be used between compact mode and expansion pattern, changing this system back and forth, in compact mode, this system class is similar to traditional golf bag, and in the expansion pattern, this system is the go-cart with monoblock type bag.This system's presently preferred embodiment has single telescopic front-wheel and pair of rear wheels sub-component, and this can launch backward and outwards to the back wheel assembly, in order to highly stable wheelspan is provided.The expansion of lever operated back wheel assembly, and also allow the golfer to promote easily and control (steer turns to) this combination.

An advantage of the present utility model is, when using in the go-cart pattern of launching, provides very big stability in roll.

Another advantage of the present utility model is when using, to have an integrated units that does not need assembly and disassembly in various environment.

Another advantage of the present utility model is, uses the back wheel assembly at trailing wheel, and this back wheel assembly is installed on the rear portion of ball bag, is convenient to fold into make wheel and bag positions aligning, thereby occupies minimum space, front and back.

Another advantage of the present utility model is, this lightweight construction, and common golfer operates easily, and this structure is more cheap than separate type element system.

Another advantage of the present utility model is that it has versatility, and adjusts as handbag easily and provide roller ball car ball bag for oneself.

Another advantage of this combined type ball bag and ball car is, because its footprints is very compact and can stack effectively when needed, so be very suitable for being stored in the ball garage of golf course.

Another advantage of the present utility model is, compares with existing combined type ball truck system, and this system uses the bigger wheel with normal diameter, and this just allows this combination to roll reposefully by thicker court and the not too smooth landform of turf.

For a person skilled in the art, by describing the industrial applicibility of described enforcement known today preferred forms of the present utility model herein and preferred embodiment, and shown in several figure in the accompanying drawing, these and other targets of the present utility model and advantage are apparent.

Description of drawings

By reference to the accompanying drawings, by the following specifically describes, the purpose of this utility model and advantage are apparent, wherein:

Fig. 1 is the perspective view of the expansion pattern of the collapsible ball truck system of combination golf pocket type of the present utility model;

Fig. 2 is the perspective view of compactness (storage) pattern of the collapsible ball truck system of combination golf pocket type of the present utility model;

Fig. 3 is for launching left side view of the present utility model in (ball car) pattern;

Fig. 4 is the left side view of compact mode of the present utility model;

Fig. 5 is the top view of expansion pattern of the present utility model;

Fig. 6 is the top view of compact mode of the present utility model;

Fig. 7 is the front view of compact mode;

Fig. 8 is the rearview behind the cut-out of expansion pattern;

Fig. 9 is one detailed front view in the trailing wheel joint design;

Figure 10 is the detailed side view of the wheel joint design of Fig. 9; And

Figure 11 is the view of the inner surface of one near-end in the back leg pivot plate.

The specific embodiment

The utility model is the collapsible ball truck system of combination golf pocket type, is used for carrying and transports golf clubs and accessory.Among preceding two width of cloth figure in these figure, show the expansion pattern of the collapsible ball truck system of combination golf pocket type of the present utility model and the perspective view of compact mode.In drawing and description, folding combined type ball bag and ball car (" combination ") are by whole reference character 10 expressions.

In the preferred embodiment of the present utility model shown in Fig. 1, the expansion pattern 12(that shows this combination 10 with perspective view is also referred to as " open configuration " or " ball car pattern ").Figure 2 illustrates compact mode 14 of the present utility model, be also referred to as " storage " pattern or folding pattern 14, wherein, this compact mode is folded into the structure of volume minimum, is stored in such as in car trunk compartment, ball bag storage cabinet or the garage compactly being used for.Can discuss hereinafter from folding pattern 14 to launch pattern 12(and from expansion pattern 12 to folding pattern 14) change.

The perspective view of Fig. 1 and Fig. 2 and other views shown in the accompanying drawing show the various elements of the collapsible ball car 10 of the utility model combination golf pocket type.In these figure; as seen the utility model comprises the sub-component of three cooperations; these sub-components are respectively ball sack assembly 16, transporton assembly 18 and launch sub-component 20; ball sack assembly is suitable for storing and protects golf clubs and relevant accessory (such as golf, golf tee etc.); thereby the transporton assembly is conducive to the utility model and does not need to carry this combination around the golf course user that easily rolls; launch sub-component and cooperate with two other sub-component, thereby between compact mode 14 and expansion pattern 12, change the utility model.It should be understood that some element of the present utility model is the part of above-mentioned sub-component more than.

Ball sack assembly 16 comprises bag 22, and this bag limits inner chamber 24, and the axle (not shown) of golf clubs inserts in this inner chamber.Rigid internal framework 26 provides shaping structures for bag 22.(injection mo(u)lding in this preferred embodiment) base element 28 of rigidity provides polycrystalline substance, and than (thermoforming plastic) backboard 30 of rigidity at base element 28 and be positioned between (injection mo(u)lding) collar (collar) element 32 of rigidity at place, top of bag 22 and extend.In preferred embodiment 10, collar 32 comprises a plurality of inner separators 34, so as when club to insert in the inner chamber 24 the separation club.Flexible cloth cover 36 is adhered to base element 28, backboard 30 and collar 32, and is formed on around the inner frame 26, in order to laterally surround inner chamber 24.

The part of inner frame 26 and base element 28 forms towards the place ahead of bag, in order to limit wheel chamber 38.In the position of not disturbing other accessories, various fixed type balls and accessory bag (common cloth) are positioned at the outside of bag 22.Alternatively, bag can be replaced by container movably, and described movably container is used for holding the accessory that can attach to collar etc.

Transporton assembly 18 comprises preceding wheel assembly.Preceding wheel assembly has front-wheel 42, and this front-wheel is in front axle 44 rotations, and this front axle is supported by the two fork front baffles 46 that attach to bag 22 at preceding pivot 48 places.Before pivot 48 be positioned at the low scope place, the place ahead in wheel chamber 38, and before be pivotally mounted on the base element 28.Preceding pivot 48 has limited rotating range, and it is terminal that rotation has been shown among Fig. 1 and Fig. 2.Pivot 48 before 50 lockings of pivot cam bar and the release, thus make front-wheel 42 in expansion pattern 12, from bag 22, to launch forward, perhaps in compact mode 14, be retracted in the wheel chamber 38.In presently preferred embodiment 10, the user manually locatees front-wheel 42.

Transporton assembly 18 comprises pair of rear wheels sub-component 51, and this is to back wheel assembly symmetry and be installed in pivotally on the bag backboard 30 of bag 22.Back wheel assembly 51 further comprises left rear wheel 52 and off hind wheel 54.At the far-end of back leg pivot plate 58, each trailing wheel 52,54 is installed on the corresponding rear axle 56.Each back leg pivot plate 58 is operated collaboratively with corresponding parallel links 60, and described parallel links and pivot plate 58 are arranged in pivot parallelogram mode (especially referring to Fig. 5,8,9 and 10).Each back leg pivot plate is connected to the Pivot joint 62 that is installed on bag backboard 30 with corresponding parallel links 60 in its proximal end, Pivot joint is positioned at the distance point place about equally with base element 28 and collar 32.Each back leg pivot plate also comprises attachment point 64 and is positioned near the return spring 66(of its near-end sees Fig. 9), can discuss hereinafter.In left rear wheel 52 and the off hind wheel 54 at least one comprises that brake 68(sees Fig. 3), the user can start this brake in case will take turns engage in place, thereby such as when combined type ball car/prevent from rotating by friction when ball bag 10 is parked on the slope.In conjunction with Fig. 9-11, discuss the detailed construction of Pivot joint 62 and related elements in more detail hereinafter.

The preceding element, preceding pivot 48 and the pivot cam bar 50 that launch sub-component 20 further have been discussed above.Posterior elements is associated with trailing wheel 52 and 54 and has the mechanism that works in coordination.

By operating grip 70, the user drives the posterior elements operation that launches sub-component 20.Handle 70 rotates between the position that folds at the rear portion against bag 22 that is in compact mode 14 shown in the expanded position that is in expansion pattern 12 shown in Fig. 1,3,5 and 8 and Fig. 2,4,6 and 7 in limited arc on the handle pivot bar 72.Provide handle adjustment cam bar 74, in order to handle 70 is locked in its desired position.When the utility model was in the expansion pattern 12, handle 70 was also as control and pushing member.

Tie point 76 is positioned on every side of handle 70, be in the position that from handle pivot bar 72, is offset slightly, this tie point is as the position of an end of pivotal attachment push rod 78, and the other end of push rod corresponding in back leg pivot plate 58 is connected to attachment point 64.All has bulb 80 on every end of each push rod 78, so that in attachment point 64 and tie point 76 rotations.When handle 70 rotated to expansion pattern 12 around handle pivot bar 72 from compact mode 14, push rod 78 upwards and outwards spurred at back leg pivot plate 58, caused the rotation backward on Pivot joint 62 of back wheel assembly 51.This makes parallel links 60 be pushed away from back leg pivot plate 58, this back leg pivot plate and then feasible back wheel assembly 51 horizontal spreadings, thus produce visible expanding wheel distance in the expansion pattern 12.On the contrary, when handle 70 rotated back in the compact mode 14, push rod 78 and return spring 66 drove back wheel assembly 51 forward and upcountry, overcame the power of return spring 66, thereby make wheel 52 and 54 be forced to against the sidepiece of bag 22, in order to realize minimum footprints.

Except the part as transporton assembly 18, handle 70 also supports some traditional element, and these elements make things convenient for the golfer to use and comfortableness is provided.These elements comprise storage disks 82, handle 84 and umbrella shape installed part 86.

In the view after the removal part of Fig. 8, this is owing to removed the part of bag backboard 30 to show inner frame 26 and inner chamber 24().Also show inner rigid backboard 88, this backboard is supporting pivot joint framework 90 especially.Pivot joint framework 90 extends between two Pivot joints 62, and aligns with Pivot joint 62 and supporting pivot joint rigidly, and this illustrates in Fig. 9 and Figure 10 especially.

Shown in Fig. 9-11, understand detailed construction and the operation of Pivot joint 62 best.In the back edge view of Figure 10, can find out Pivot joint framework 90 supporting pivot plates 92 best.Pivot plate 92 is pivotally connected to the leg portion of protruding 94, the rotation freely thereon of this leg portion and conform to the in-profile of the far-end of back leg pivot plate 58 and with its coupling.The leg portion of protruding 94 comprises bolt hole 96, and bolt hole is convenient to back leg pivot plate and parallel links 60 are attached to pivot plate 92.

Figure 10 also illustrates push rod 78 and how to interact with the back leg pivot plate.Attachment point 64 supports bulb 98, and this bulb cooperates with bulb 80 on the end of push rod 72, in order to form globe joint 100, when the back leg pivot plate moved between the position, this globe joint allowed push rod 72 rotations and keeps tight attachment.Be positioned at the other end place of push rod 72 with a kind of globe joint 100, at this other end place, this globe joint engages with tie point on the handle 70.

Figure 11 shows the surface, inside of the upper end of back leg pivot plate, comprises bolt hole 96 and the hole that is positioned at attachment point 64 places, and bolt hole is conducive to the back leg pivot plate is fixed in the pillar 94.Inner lip-deep notable feature is inclined-plane 102, and this inclined-plane engages with the pivot plate of fixing 92, and the back leg plate rotates to expansion pattern 12 from compact mode 14.In the process of carrying out this rotation, inclined-plane 102 is used for promoting the back leg pivot plate away from bag 22 outwardly.Leverage is obviously bigger in the proximal end of back leg pivot plate, thereby enough wide by back wheel assembly 51 formed wheelspan in expansion pattern 12, so that stably control and roll across the golf course surface.

In preferred embodiment 10, handle 70 and back wheel assembly 51 mainly are made of light-duty durable anodised aluminium.Wheel 42,52 and 54 is made of the plastics of the lightweight construction with buffering traction surface, and can be provided with solid wheel hub or wheel spoke barrel.The bag element comprises common cloth cover 36, is used for the molded or thermoforming plastic of rigid structure element (28,30,32 and 38) and aluminium or the synthetic material that is used for inner frame 26 and Pivot joint framework 90.

Under the situation that does not change character of the present utility model, can carry out multiple modification to above-described embodiment.Can revise the size and dimension of parts and structural material, to be used for particular environment.

Though various embodiment described above only it should be understood that to propose these embodiment by example that these embodiment do not have restricted.

Industrial applicibility

The collapsible ball car 10 of folding combination golf pocket type of the present utility model is mainly used by the golfer, and the golfer the utlity model has maximum convenience and security when playing golf and wish to carry golf bag.This combined system is in light weight, and extremely is compressed into compact mode 14 so that store.Launch and fold with minimum strength.For rolling when playing golf and supporting club and accessory, expansion pattern 12 is highly stable.

In routine is used, the collapsible ball car 10 of combination golf pocket type begins in compact mode 14, so that store, wherein handle 70 is by folding against bag backboard 30 tightly, in the front-wheel 42 withdrawal wheel chambeies 38, and back wheel assembly 51 is held against the sidepiece of bag 22.In this pattern, only have the effective depth of bag 22, club and fraction trailing wheel (52 and 54), therefore, this combination pack in the car trunk easily or the garage support body on, and be convenient in the ball garage, stack a plurality of unit.Yet, even in compact mode 14, trailing wheel also rotates freely, and suppose that brake 68 is disengaged, and this combined system can be rolled to desired position.

When the golfer moves to expectation free rolling position with compact mode 14 combinations (because it is lighter, so realize easily), just should be launched into expansion pattern 12.For this reason, the golfer is 50 releases of pivot cam bar, and forward and downwards manually pivot front-wheel 42 pivot up to stopping arriving outside the wheel chamber 38, this moment, the pivot cam bar 50 relocked.For deploying handles 70 and back wheel assembly 51, with 74 releases of handle adjustment cam bar, and pulling handle 70, in order to upwards and outwards pivot around handle pivot bar 72.This makes push rod 78 pull back back leg pivot plate 58, and inclined-plane 102 simultaneously with each the back wheel assembly 51 be pushed to outwardly overall with to the rear tread position.When launching fully, lock handle adjustment cam bar 74 again.

When having played golf, the golfer puts upside down the expansion operation simply, returns compact mode 14 in order to will make up 10.When carrying out this operation, return spring 66 makes wheel assembly 51 compressions in back return against bag 42, so whole system has minimum footprints.

The collapsible ball car 10 of folding combination golf pocket type of the present utility model has great convenience, easy operation, reservoir volume compactness and in light weight, thereby need not when playing golf for hope to bear for any golfer of bag weight, have and use needed accessory to become a kind of enjoyment.

Owing to above and other reason, expect that the collapsible ball car 10 of folding combination golf pocket type of the present utility model has industrial applicibility widely.Therefore, expect that commercial use of the present utility model extensively and lastingly.

In the time of various embodiment described above, only it should be understood that to propose these embodiment by example that these embodiment do not have restricted.Therefore, the range of a preferred embodiment and scope should not be subjected to the restriction of any above-mentioned one exemplary embodiment, and should only be limited by following claims and equivalent thereof.

List of reference characters:

10 golf carts and the combination of ball bag

12 launch (ball car) pattern

14 compactnesses (store or fold) pattern

16 ball sack assemblies

18 transporton assemblies

20 launch sub-component (E)

22 bags

24 inner chambers

26 inner frames

28 substrates (bottom) element

30 bags of backboards

32 collars

34 separators

36 sheaths

38 take turns the chamber

42 front-wheels

44 front axles

46 front baffles

Pivot before 48

50 pivot cam bars

51 back wheel assemblies

52 left rear wheels

54 off hind wheels

56 rear axles

58 back leg pivot plates

60 parallel links

62 Pivot joints

64 attachment point

66 return springs

68 brakes

70 handles

72 handle pivot bars

74 handle adjustment cam bars

76 tie points

78 push rods

80 bulbs

82 storage disks

84 handles

86 umbrella shape installed parts

88 inner backboards

90 Pivot joint frameworks

92 pivot plates

94 pillars

96 bolts hole

98 bulbs

100 globe joints

102 inclined-planes

Claims (10)

1. a collapsible ball car is characterized in that, described collapsible ball car comprises:

Ball sack assembly comprises the wheel chamber;

The transporton assembly comprises the telescopic preceding wheel assembly and a pair of back wheel assembly of installing pivotally that are connected with described ball sack assembly, and described preceding wheel assembly has front-wheel, and each described back wheel assembly all has trailing wheel; And

Launch sub-component, described preceding wheel assembly and described back wheel assembly are pivotally connected in described expansion sub-component,

Described ball car has expansion pattern and compact mode, in described compact mode, described front-wheel be positioned at described take turns among the chamber and described back wheel assembly against described bag, in described expansion pattern, described front-wheel is positioned at described take turns outside the chamber and described back wheel assembly is in backward with outside position with respect to described bag and has stable scroll wheel distance, and described expansion sub-component is configured to make described front-wheel and described back wheel assembly to pivot between described compact mode and described expansion pattern.

2. collapsible ball car according to claim 1 is characterized in that, described ball car further comprises:

Handle operatively engages with described back wheel assembly.

3. collapsible ball car according to claim 2, it is characterized in that, described ball car further comprises push rod, described push rod is connected between described handle and the corresponding described back wheel assembly, and described push rod is configured to around the pivot of pivot corresponding described back wheel assembly be pivoted by described handle between described compact mode and described expansion pattern.

4. collapsible ball car according to claim 3, it is characterized in that, described back wheel assembly comprises portion extending transversely, described cage structure extending transversely become by described handle around the pivot of described pivot make described back wheel assembly away from or promote near the horizontal direction of bag.

5. collapsible ball car according to claim 4, it is characterized in that, described back wheel assembly comprises the back leg pivot plate, described back leg pivot plate is connected between described ball sack assembly and the corresponding described trailing wheel, and described cage structure extending transversely is the lip-deep inclined-plane towards described ball sack assembly that is positioned at described back leg pivot plate.

6. collapsible ball car according to claim 5 is characterized in that, described ball car further comprises parallel links, and each described back leg pivot plate is all operated collaboratively with corresponding described parallel links.

7. according to each described collapsible ball car among the claim 3-6, it is characterized in that the two ends of described push rod have globe joint, described push rod is connected to described handle and corresponding described back wheel assembly by described globe joint.

8. according to each described collapsible ball car among the claim 1-6, it is characterized in that described back wheel assembly is connected in described ball sack assembly at half place of the vertical height of described ball sack assembly.

9. according to each described collapsible ball car among the claim 1-6, it is characterized in that described bottom of taking turns the place ahead in chamber is provided with preceding pivot, described front-wheel is arranged on the described preceding pivot pivotly by support member.

10. according to each described collapsible ball car among the claim 1-6, it is characterized in that described preceding wheel assembly and/or described back wheel assembly comprise one or more in return element, locking member, the braking member.

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