CN207072373U - Trolley - Google Patents

Abstract

The utility model discloses a kind of trolley, including：Pipe, paired car body branch pipe, paired protrusive tube, paired support tube, seat mount and changeable rotation positioning device between lock position and unlocked position after paired vehicle frame front tube, paired vehicle frame, it is in lock position rotational positioning position that vehicle frame front tube and car body branch pipe is sealed integral, vehicle frame front tube and car body branch pipe are discharged respectively in unlocked position rotational positioning position, and the front end of pipe and the upper end of support tube close can be folded each other after vehicle frame when unlocked, the rear end of pipe and the front end of vehicle frame front tube close can be folded each other after vehicle frame.According to trolley of the present utility model, by setting rotation positioning device, it is possible to achieve the expansion and folding of vehicle body so that trolley it is easy to operate, it is practical.It when trolley is in folded state, can be convenient for carrying, save space-consuming.

Description

Trolley

Technical field

Perambulator technical field is the utility model is related to, more particularly, to a kind of trolley.

Background technology

The trolley of existing children does not largely have folding function, when carrying trolley is outgoing, due to Trolley is not foldable, and carrying is very inconvenient, and great inconvenience is brought for the use of user.

In order to solve the above problems, some trolleys setting folding functional in correlation technique, but folding operation ratio It is cumbersome, and there is the problem of unstable in locking mechanism, it is insecure often to occur that vehicle frame is fixed so that the practicality of trolley Substantially reduced with operability.

Utility model content

The utility model is intended at least solve one of technical problem present in prior art.Therefore, the utility model carries Go out a kind of trolley, the trolley can realize folding, and simple to operate, practical.

According to the trolley of the utility model embodiment, paired vehicle frame front tube, each vehicle frame front tube is from front to back Be inclined upwardly extension, and the front end of two vehicle frame front tubes is connected to form U-shaped side arm, and the front bottom end of the U-shaped side arm is provided with Front-wheel；Managed after paired vehicle frame, managed after each vehicle frame and tilt down extension from front to back, after each vehicle frame before pipe Hold and be rotatablely connected with the centre position of the corresponding vehicle frame front tube, the rear end of pipe is provided with trailing wheel after each vehicle frame；In pairs Car body branch pipe, the front end of each car body branch pipe is connected with the rear end thereof of the corresponding vehicle frame front tube, described in two The rear end of car body branch pipe is connected to form U-shaped after-frame, and the rear end of the U-shaped after-frame forms handle portion；Paired protrusive tube, Mei Gesuo Protrusive tube is stated from the front end of the corresponding car body branch pipe to extend forward and be fixed as one with the car body branch pipe；Paired branch Stay tube, the upper end of each support tube are rotatablely connected with the corresponding car body branch pipe, the lower end of each support tube and The rear end thereof connection of pipe, the support tube are provided with buffer structure after the corresponding vehicle frame；Seat mount, the seat Fixed mount is detachably connected between two protrusive tubes；Changeable rotation is determined between lock position and unlocked position Position device, the rotation positioning device coordinate with the vehicle frame front tube and the car body branch pipe respectively, are turning described in lock position Dynamic position location is sealed integral by the vehicle frame front tube and the car body branch pipe, in rotational positioning position described in unlocked position point The vehicle frame front tube and the car body branch pipe are not discharged, when unlocked the front end of pipe and the upper end of the support tube after the vehicle frame Close it can be folded each other, the rear end of pipe and the front end of the vehicle frame front tube close can be folded each other after the vehicle frame.

According to the trolley of the utility model embodiment, by setting rotation positioning device, it is possible to achieve the expansion of vehicle body And folding so that trolley it is easy to operate, it is practical.It when trolley is in folded state, can be convenient for carrying, save Space-consuming.

According to some embodiments of the utility model, the buffer structure includes：Connecting tube, the connecting tube rotation connection After the vehicle frame on pipe, support tube described in the connecting tube overcoat；Buffer spring, the buffer spring are enclosed on the support outside Guan Shang, one end of the buffer spring are only against on the support tube, and the other end of the buffer spring is only against the connection Guan Shang.

According to some embodiments of the utility model, the buffer structure also includes：Protection pipe, the protection pipe are enclosed on outside On the buffer spring.

According to some embodiments of the utility model, the support tube is provided with sliding groove, and the sliding groove is along the branch The length direction extension of stay tube, the connecting pole for connecting pipe after the connecting tube and the vehicle frame coordinate in the sliding groove It is interior.

According to some embodiments of the utility model, the rotation positioning device includes：Drawing article, the drawing article can live It is located at dynamicly on the car body branch pipe；Drawstring, one end of the drawstring are located on the drawing article to be driven by the drawing article The drawstring movement；Lock piece, the lock piece coordinate with the vehicle frame front tube and the car body branch pipe respectively, the drawstring The other end is connected with the lock piece.

According to some embodiments of the utility model, the lock piece between lock position and unlocked position movably It is located on the car body branch pipe, the lock piece is provided with lock pin；The rotation positioning device includes：Pushed away towards lock position Move the elastic component of the lock piece；The vehicle frame front tube is provided with loose slot, and the loose slot includes locking section and unblock section, institute The arc-shaped slot that unblock section is formed around pivot center setting is stated, the locking section is connected with the unblock section, in solution lock-bit The lock pin coordinates in the unblock section when putting, and at lock position, the lock pin is stuck in the locking section, described Locking section is connected to one section of the unblock section and formed along the extending radially inwardly for section of unblock.

According to some embodiments of the utility model, the rotation positioning device includes：It is located on the car body branch pipe Determine clamp, the lock piece be located at the car body branch pipe and it is described determine clamp between, it is described to determine clamp and be provided with and the locking Sell be engaged determine groove, it is described to determine flute profile and turn into strip.

According to some embodiments of the utility model, the rotation positioning device includes：It is located in the vehicle frame front tube Dynamic clamp, the dynamic clamp be located at the vehicle frame front tube and it is described determine clamp between, the dynamic clamp provided with and the locking The dynamic groove being engaged is sold, the shape of the dynamic groove is identical with the shape of the loose slot.

According to some embodiments of the utility model, receiving is limited between the seat mount and the protrusive tube Chamber, the accommodating chamber include the first accommodating chamber for being limited by the protrusive tube and limited by the seat mount and with it is described Second accommodating chamber of the first accommodating chamber connection, the accommodating chamber is interior to be provided with moving member, and the moving member is in position location and rotation Between position may move, when the moving member is located at the position location, the moving member respectively with first accommodating chamber, institute The second accommodating chamber is stated to coordinate so that the seat mount and the protrusive tube are fixedly linked；The moving member is located at the rotation During position, the moving member is only with one of cooperation in first accommodating chamber and second accommodating chamber so that the seat Chair fixed mount is pivotably connected with the protrusive tube.

According to some embodiments of the utility model, tumbler is provided with first accommodating chamber, the tumbler is located at Between the seat mount and the moving member, process that the tumbler rotates between the first position and the second position In, the tumbler promote the moving member to be moved between position location and turned position.

Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description In become obvious, or by it is of the present utility model practice recognize.

Brief description of the drawings

Of the present utility model above-mentioned and/or additional aspect and advantage will in the description from combination accompanying drawings below to embodiment Become obvious and be readily appreciated that, wherein：

Fig. 1 is the overall structure diagram according to the trolley of the utility model embodiment；

Fig. 2 is the overall structure diagram of another angle of the trolley shown in Fig. 1；

Fig. 3 is the assembling schematic diagram of the support tube and buffer structure shown in Fig. 1；

Fig. 4 is the assembling schematic diagram of the support tube and connecting tube shown in Fig. 3；

Fig. 5 is the explosive view of junction between the vehicle frame front tube shown in Fig. 1 and car body branch pipe；

Fig. 6 is the partial schematic diagram of the vehicle frame front tube shown in Fig. 1；

Fig. 7 is the vehicle frame front tube shown in Fig. 6 and the assembling schematic diagram of dynamic clamp；

Fig. 8 is the explosive view of junction between the seat mount shown in Fig. 1 and protrusive tube；

Fig. 9 is the explosive view of another angle of junction between the seat mount shown in Fig. 8 and protrusive tube；

Figure 10 is the schematic diagram according to the connector of the utility model embodiment.

Reference：

Trolley 100,

Vehicle frame front tube 1, front-wheel 10, loose slot 11, locking section 111, unblock section 112, pivot pin 12,

Pipe 2 after vehicle frame, trailing wheel 20, car body branch pipe 3, handle portion 30, article placement section 31,

Protrusive tube 4, the first accommodating chamber 40a,

First pipeline section 41, neck 41a, the second pipeline section 42, connector 43, clamping part 431,

Support tube 5, sliding groove 50a, connecting tube 51, seat mount 6, the second accommodating chamber 60a, inclined-plane 60b,

Tumbler 61, pulling department 611, convex tendon 612, moving member 62,

Drawing article 71, lock piece 72, pull groove 72a, lock pin 721,

Determine clamp 73, determine groove 73a, determine clamp extension 731, the first stopper protrusion 732,

Dynamic clamp 74, dynamic groove 74a, dynamic clamp extension 741, the second stopper protrusion 742,

Buffer structure 8, stopper section 81, connecting tube 82, connection boss 821, mounting boss 822,

Counterbore 822a, protection pipe 83.

Embodiment

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model Limitation.

In description of the present utility model, it is to be understood that term " length ", " on ", " under ", "front", "rear", The orientation of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " radial direction ", " circumference " or position are closed It is to be described based on orientation shown in the drawings or position relationship, to be for only for ease of description the utility model and simplifying, rather than Indicate or imply that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore can not It is interpreted as to limitation of the present utility model.In addition, define " first ", the feature of " second " can be expressed or implicitly include One or more this feature.In description of the present utility model, unless otherwise indicated, " multiple " are meant that two or two More than individual.

, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.

Hand push below with reference to Fig. 1-Figure 10 with a specific embodiment detailed description according to the utility model embodiment Car 100, the trolley 100 can realize folding and expansion, be easy to carry, practical.Be worth understand, it is described below only It is exemplary illustration, rather than the concrete restriction to utility model.

As shown in Fig. 1-Figure 10, according to the trolley 100 of the utility model embodiment, including paired vehicle frame front tube 1, into To vehicle frame after pipe 2, paired car body branch pipe 3, paired protrusive tube 4, paired support tube 5, seat mount 6 and rotate it is fixed Position device.

Wherein, as depicted in figs. 1 and 2, trolley 100 is overall substantially in the high trend in the low rear end in front end, before each vehicle frame Pipe 1 is inclined upwardly extension from front to back, and the front end of two vehicle frame front tubes 1 is smooth to be connected together to U-shaped side arm, before U-shaped side arm End bottom is provided with two front-wheels 10, and two front-wheels 10 are pivotly connected with U-shaped side arm respectively so that front-wheel 10 is formed as universal Wheel, front-wheel 10 are rotated in perpendicular to realize that the movement of trolley 100, front-wheel 10 rotate to realize hand push in the horizontal plane The steering of car 100.

Pipe 2 or so is arranged at intervals after two vehicle frames, and pipe 2 tilts down extension from front to back after each vehicle frame, is managed after vehicle frame 2nd, a triangle is substantially formed between the vehicle frame front tube 1 being connected with pipe after vehicle frame 2 and ground, so as to so that trolley 100 keep stable in bearing load.The front end of pipe 2 rotates with the centre position of corresponding vehicle frame front tube 1 and connected after each vehicle frame Connect so that vehicle frame front tube 1 can rotate relative to pipe after vehicle frame 2, the folding and expansion of trolley 100 be realized with auxiliary, each The rear end of pipe 2 is equipped with a trailing wheel 20 after vehicle frame.Trailing wheel 20 is pivotly connected with pipe after vehicle frame 2 so that trailing wheel 20 is formed For directional wheel, trailing wheel 20 is rotated in perpendicular further to realize the movement of trolley 100, while after trailing wheel 20 and vehicle frame The junction of pipe 2 can be provided with lockable mechanism, to realize the rotation of trailing wheel 20 or static.When lockable mechanism is located at its lock position When, lockable mechanism pins trailing wheel 20 so that trailing wheel 20 can not rotate relative to pipe after vehicle frame 2, and now trolley 100 can not move It is dynamic, improve the security of trolley 100；When lockable mechanism is located at its unlocked position, after trailing wheel 20 can be relative to vehicle frame Pipe 2 is rotated, and now trolley 100 can be user-friendly with normal movement.

The front end of each car body branch pipe 3 is connected with the rear end thereof of corresponding vehicle frame front tube 1, and trolley is realized with auxiliary 100 folding and expansion, the rear end of two car body branch pipes 3 is smooth to be connected together to U-shaped after-frame, and the rear end of U-shaped after-frame forms handle Hand 30, user, can be by promoting handle portion 30 to drive trolley 100100 to move forward when using trolley 100.U rows The upper end of after-frame can set handle governor motion so that handle portion 30 relative to the tread of trolley 100 height adjustable, with The user of different heights is adapted to, so as to improve the applicability of trolley 100.One of car body branch pipe 3 is put provided with article Portion 31 is put, article placement section 31 is set adjacent to handle portion 30, can be used for placing children's ordinary articles such as cup, and be easy to User's storage, take.

Each protrusive tube 4 extends forward from the front end of corresponding car body branch pipe 3, seat mount 6 from back to front, on to Lower extension, seat mount 6 are detachably connected between the upper end of two protrusive tubes 4, due to protrusive tube 4 and car body branch pipe 3 It is fixed as one, so as to ensure that the stability of seat mount 6, improves the reliability of seat mount 6.Such as Fig. 1 and Fig. 2 Shown, seat mount 6 is generally formed into Long Circle fixed mount, and seat mount 6 is provided with calash bracket and handrail for children portion, Bicycle shed support avoids children from tanning severely, handrail for children portion can protect the safety of children with the hood of support trolley 100.Wherein, Protrusive tube 4 includes the first pipeline section 41 and the second pipeline section 42 being connected with each other, and the first pipeline section 41 is connected with seat mount 6, and second Pipeline section 42 is connected with protrusive tube 4.Wherein, the first pipeline section 41 is detachably connected with the second pipeline section 42, as shown in Figure 1, Figure 2 with Figure 10 institutes Show, formed with neck 41a in the side wall of the first pipeline section 41, be provided with connector 43 in the second pipeline section 42, the lower end of connector 43 and Second pipeline section 42 is pivotably connected, and the upper end of connector 43 is provided with the clamping part 431 being adapted with neck 41a, and connector 43 Upper end and the second pipeline section 42 between can be provided with spring and spring and often push out clamping part 431 so that clamping part 431 coordinates To realize that the first pipeline section 41 is connected with the detachable of the second pipeline section 42 in neck 41a, so as to realize seat mount 6 and extension The detachable of pipe 4 is connected.

Seat mount 6 and the pivotable connection of protrusive tube 4, to adjust the angle of inclination of seat mount 6, ensure good Comfortableness.As shown in Figure 1, Figure 2, shown in Fig. 8 and Fig. 9, accommodating chamber is limited between seat mount 6 and protrusive tube 4, accommodating chamber includes The the first accommodating chamber 40a limited by protrusive tube 4 and the second appearance for being limited by seat mount 6 and being connected with the first accommodating chamber 40a Receive chamber 60a, moving member 62 is provided with accommodating chamber, moving member 62 is removable between position location and turned position.First accommodates Tumbler 61 is provided with chamber 40a, tumbler 61 is between seat mount 6 and moving member 62, and tumbler 61 is in first position During being rotated between the second place moving member 62 can be promoted to be moved between position location and turned position.Work as rotation During 61 position first position of part, moving member 62 is located at position location, and moving member 62 accommodates with the first accommodating chamber 40a, second respectively Chamber 60a coordinates so that seat mount 6 and protrusive tube 4 are fixedly linked；When moving member 62 is located at the second place, moving member 62 In turned position, moving member 62 only coordinates so that seat mount 6 and protrusive tube 4 are pivotably connected with the first accommodating chamber 40a.

As shown in Figure 8 and Figure 9, the first accommodating chamber 40a and the second accommodating chamber 60a perisporium can be each formed with multiple dentations Groove, the periphery wall of moving member 62 is provided with the multiple detent projections being adapted to multiple tooth-like recesses, when the dentation of moving member 62 is convex Rise when the tooth-like recesses with the first accommodating chamber 40a, the second accommodating chamber 60a tooth-like recesses coordinate respectively, the phase of seat mount 6 Relatively unrotatable for protrusive tube 4, now moving member 62 is located at position location；When the detent projection of moving member 62 is only with first When accommodating chamber 40a tooth-like recesses coordinate, seat mount 6 can rotate relative to protrusive tube 4, and now moving member 62, which is located at, turns Dynamic position.

Further, as shown in Figure 8 and Figure 9, the outward flange of tumbler 61 is provided with pulling department 611, and pulling department 611 can be with One end of steel wire rope is connected, and the other end of steel wire rope is connected with the handle (not shown) of seat mount 6, pull handle, leads to Crossing steel wire rope can drive tumbler 61 to rotate.Formed with the circumference along the second accommodating chamber 60a in second accommodating chamber 60a side wall Spaced apart three inclined-plane 60b, the side towards inclined-plane 60b of tumbler 61 are provided with three convex tendons 612, three convex tendons 612 Correspond with three inclined-plane 60b and mutually only support respectively so that tumbler 61 is being turned to the process of the second place by first position In, due to inclined-plane 60b guide effect so that tumbler 61 moves towards close to the first accommodating chamber 40a direction, so as to promote Moving member 62 is moved to turned position by position location towards close to the first accommodating chamber 40a direction so that seat mount 6 with Pivotably it is connected by being fixedly linked to be converted between protrusive tube 4.Wherein, elasticity can be provided between moving member 62 and protrusive tube 4 Return unit, dynamic clamping head and quiet clamping head Chang Chaoxiang promote moving member 62 close to the second accommodating chamber 60a direction, realize answering for moving member 62 Position so that after the adjustment at angle of inclination of seat mount 6 is completed, moving member 62 is towards close to the second accommodating chamber 60a side Coordinate to the mobile tooth-like recesses with the tooth-like recesses with the first accommodating chamber 40a simultaneously, the second accommodating chamber 60a, after ensureing adjustment Seat mount 6 positional stability.

Two support tubes 5 or so are arranged at intervals, and two support tubes 5 are connected by the connecting tube 8251 of connecting tube 82, and often The upper end of individual support tube 5 is rotatablely connected with corresponding car body branch pipe 3, the lower end of each support tube 5 and pipe 2 after corresponding vehicle frame Rear end thereof connects, to ensure the bearing capacity of trolley 100.Wherein, support tube 5 is provided with buffer structure 8, with further auxiliary Help the folding and expansion for realizing trolley 100.

As shown in figure 3, buffer structure 8 is two, and the connected setting of the two buffer structures 8, each buffer structure 8 include The connecting tube 8251 of connecting tube 82, buffer spring (not shown) and protection pipe 83.The connecting tube 8251 of connecting tube 82 is tied positioned at buffering The lower end of structure 8 and the connecting tube 8251 of connecting tube 82 are rotatably connected on after vehicle frame on pipe 2, the support of the overcoat of 82 connecting tube of connecting tube 8251 The lower end of pipe 5.It is enclosed on outside buffer spring on support tube 5, support tube 5 is provided with stopper section 81, and the upper end of buffer spring is only against On stopper section 81, and position-limiting action, buffering elastic are played in the upper end of the overcoat buffer spring of stopper section 81 with the upper end to buffer spring The lower end of spring is only against in the connecting tube 8251 of connecting tube 82, and the lower end of the overcoat buffer spring of 82 connecting tube of connecting tube 8251 is with right Play position-limiting action in the lower end of buffer spring.Protection pipe 83 is located between stopper section 81 and the connecting tube 8251 of connecting tube 82 and protected It is enclosed on outside pipe 83 on buffer spring, to play a part of protecting spring.

As shown in figure 3, the periphery wall of the connecting tube 8251 of connecting tube 82 is provided with connection boss 821 and assembling diametrically Boss 822, connection boss 821 are located at the side towards pipe after vehicle frame 2 of the connecting tube 8251 of connecting tube 82, mounting boss 822 The side of pipe 2 after the remote vehicle frame of the connecting tube 8251 of connecting tube 82, connecting pole sequentially pass through mounting boss 822, connection boss It is connected after 821 with pipe after vehicle frame 2, it is achieved thereby that the rotation between the lower end of support tube 5 and the rear end of pipe 2 after corresponding vehicle frame Connection.Mounting boss 822 is provided with hexagonal counterbore 822a, for connecting pipe 2 after the connecting tube 8251 of connecting tube 82 and vehicle frame The head of connecting pole (not shown) be hexagon, the head fits of connecting pole are in counterbore 822a, to drive and the company of limitation The rotation of post is connect, pipe 2 after the connecting tube 8251 of pipe 82 and/or vehicle frame is disconnected so as to avoid connecting pole from occurring from, ensures The reliability connected after connecting tube 82 connecting tube 8251 and vehicle frame between pipe 2.

Further, as shown in figure 4, the lower end of support tube 5 is provided with two sliding groove 50a, and two sliding groove 50a edges branch The diametrically setting of stay tube 5, two sliding groove 50a run through the periphery wall and internal perisporium of support tube 5, each sliding groove 50a Extend along the length direction of support tube 5, the connecting pole for connecting pipe 2 after the connecting tube 8251 of connecting tube 82 and vehicle frame coordinates in cunning In dynamic groove 50a, and connecting pole can move in sliding groove 50a along sliding groove 50a bearing of trend relative to sliding groove 50a.By This, when being downwardly applied to certain active force to support tube 5, support tube 5 drives stopper section 81 under the promotion of above-mentioned active force Moved down with respect to the connecting tube 8251 of connecting tube 82 to compress buffer spring, so as to play a part of buffering, vibration damping.

Rotation positioning device can switch between lock position and unlocked position, with realize the folding of trolley 100 and Expansion.Wherein, when rotation positioning device is in lock position, trolley 100 is in deployed condition；At rotation positioning device When unlocked position, trolley 100 is in folded state.As depicted in figs. 1 and 2, rotation positioning device respectively with vehicle frame front tube 1 Coordinate with car body branch pipe 3, it is in lock position, rotational positioning position that vehicle frame front tube 1 and car body branch pipe 3 is sealed integral so that Trolley 100 is in deployed condition, discharges vehicle frame front tube 1 and car body branch pipe 3 respectively in unlocked position, rotational positioning position, from And realize the folding of trolley 100.Specifically, when rotation positioning device switches to unlocked position by lock position, vehicle frame Afterwards the upper end of the front end of pipe 2 and support tube 5 can close to be folded each other, front end of the rear end of pipe 2 with vehicle frame front tube 1, car after vehicle frame The rear end of body branch pipe 3 can be close to being folded each other, until rotation positioning device is located at unlocked position, so as to complete trolley 100 Fold, save the space-consuming of trolley 100, and be convenient for carrying.Meanwhile rotation positioning device is when being in the unlocked position, car The center of gravity of pipe 2, car body branch pipe 3 and seat mount 6 is respectively positioned on the bottom of trolley 100 after frame front tube 1, vehicle frame, so as to ensure Stability of the trolley 100 in folded state.

Specifically, as shown in Figure 5-Figure 7, rotation positioning device includes drawing article 71, drawstring (not shown), lock piece 72nd, elastic component (not shown), determine clamp 73 and dynamic clamp 74.Drawing article 71 is movably located on car body branch pipe 3, drawing article 71 can move along its length relative to car body branch pipe 3.One end of drawstring is located on drawing article 71 to be driven by drawing article 71 Drawstring moves, and the other end of drawstring is connected with lock piece 72, and formed with groove 72a is pulled wherein on lock piece 72, drawstring can match somebody with somebody Close and pulling in groove 72a.Lock piece 72 be located at car body branch pipe 3 and determine between clamp 73 and lock piece 72 respectively with vehicle frame front tube 1 Coordinate with car body branch pipe 3 so that lock piece 72 may move between lock position and unlocked position.Elastic component is towards lock position Lock piece 72 is often promoted, so as to realize automatically reseting for lock piece 72, that is to say, that it is fixed that will rotate to pull drawing article 71 Position device switch to unlocked position, now lock piece 72 towards unlocked position movement with compression elastic piece；Unclamp drawing article 71, lock Stop member 72 is displaced downwardly to lock position in the elastic force effect of elastic component, realizes automatically reseting for lock piece 72, is easy to user to turn Dynamic positioning system switches to lock position.

Further, as shown in Figure 5-Figure 7, lock piece 72 is provided with lock pin 721, and vehicle frame front tube 1 is provided with loose slot 11, loose slot 11 includes locking section 111 and unblock section 112, and unblock section 112 is formed around the circular arc of pivot center setting Groove, locking section 111 are connected with unblock section 112, and locking section 111 is connected to unblock one section of section 112 and along the radial direction for unlocking section 112 Extend internally and form.In unlocked position, lock pin 721 coordinate unblock section 112 in, now lock pin 721 can unlock Slided in section 112 around pivot center, it is achieved thereby that the relative rotation between vehicle frame front tube 1 and car body branch pipe 3；In locking During position, lock pin 721 be stuck in locking section 111, lock pin 721 can not relatively rotate axis in the loose slot 11 and be turned It is dynamic, so that can not be relatively rotated between vehicle frame front tube 1 and car body branch pipe 3.Here, it is necessary to explanation, direction " interior " is close to the direction in the center of circle of unblock section 112.

As shown in Figure 5-Figure 7, determine one end being connected with car body front tube that clamp 73 is located at car body branch pipe 3, to determine on clamp 73 It extend into the cavity that above-mentioned one end of car body branch pipe 3 limits provided with determining clamp extension 731 and determine clamp extension 731, It is connected so that clamp 73 will be determined with car body branch pipe 3.Determine clamp 73 and determine groove 73a provided with what is be engaged with lock pin 721, determine groove 73a Be formed as strip, so as to which lock pin 721 can determined to avoid rotation positioning device from locking relative to groove 73a movements are determined in groove 73a Stop bit put between unlocked position switch during occur it is stuck, with realize smoothly switching.Wherein, determine groove 73a shape and Size can be roughly the same with the shape and size of the locking section 111 of loose slot 11.As shown in Figure 5-Figure 7, clamp 74 is moved to be located at Between one end being connected with car body branch pipe 3 of vehicle frame front tube 1 and dynamic clamp 74 are located at vehicle frame front tube 1 and determine clamp 73, clamp is moved 74 are provided with the cavity that above-mentioned one end that dynamic clamp extension 741 and dynamic clamp extension 741 extend into vehicle frame front tube 1 limits It is interior, dynamic clamp 74 is connected with vehicle frame front tube 1.Dynamic clamp 74 is provided with the dynamic groove 74a being engaged with lock pin 721, moves groove 74a shape is identical with the shape of loose slot 11.When being relatively rotated between vehicle frame front tube 1 and car body branch pipe 3, move clamp 74 with As vehicle frame front tube 1 is rotated relative to clamp 73 is determined, dynamic groove 74a and loose slot 11 of the lock pin 721 on dynamic clamp 74 Unlock in section 112 and slide.In the example in figure 7, dynamic groove 74a is limited and formed jointly by dynamic clamp 74 with vehicle frame front tube 1, certainly, Dynamic groove 74a can also only be limited by dynamic clamp 74 and formed.

Specifically, as shown in figure 5, the outward flange for determining clamp 73 is provided with the first stopper protrusion 732, one of dynamic clamp 74 Exceptionally edge is formed around the circular arc of pivot center setting, and one end of the circular arc is provided with and the phase of the first stopper protrusion 732 The second stopper protrusion 742 coordinated.Specifically, when moving clamp 74 and determining the cooperation of clamp 73, the first stopper protrusion 732 and second The phase of stopper protrusion 742 is only supported.When rotation positioning device switches to unlocked position by lock position, vehicle frame front tube 1 and car body branch Relatively rotated between pipe 3, radiused edges of first stopper protrusion 732 along dynamic clamp 74 are directed away from the second stopper protrusion Slide in 742 direction；When rotation positioning device switches to lock position by unlocked position, the first stopper protrusion 732 is along dynamic The radiused edges of clamp 74 are slided towards close to the direction of the second stopper protrusion 742, until stopping with the phase of the second stopper protrusion 742 Support, now rotation positioning device switches to lock position, and the second stopper section 81 can play circumferential spacing to the first stopper section 81 Effect, with ensure rotation positioning device can stablize be in lock position.

Car body branch pipe 3 is provided with pivot pin 12, lock piece 72, determines that clamp 73 and dynamic clamp 74 are outer respectively to be enclosed on pivot pin 12, So that lock piece 72, determining clamp 73 and dynamic clamp 74 and can be rotated around pivot pin 12, realize lock piece 72, determine clamp 73 and dynamic card Plate 74 rotates coaxially.For example, in the example in figure 7, pivot pin 12 is located in car body front tube, equally realizes lock piece 72, determine Clamp 73 rotates coaxially with dynamic clamp 74.

Thus, when lock piece 72 coordinates with vehicle frame front tube 1 and car body branch pipe 3, rotation positioning device is in lock position, Lock pin 721 is located at the locking section 111 of loose slot 11, and vehicle frame front tube 1 is fixed to be integrated with car body branch pipe 3, vehicle frame front tube 1 It can not be relatively rotated between preceding branch section, trolley 100 is in deployed condition；When rotation positioning device is needed by locking position Put when switching to unlocked position, pull drawing article 71, drawing article 71 drives drawstring to move up, and the other end of drawstring pulls locking Part 72 moves so that lock pin 721 slips away locking section 111 to enter one end of unblock section 112 upwards, now rotational positioning Device unlocks, and can be relatively rotated between vehicle frame front tube 1 and car body branch pipe 3, lock pin 721 is with vehicle frame front tube 1 and car The relative rotation of body branch pipe 3 and slided in unblock section 112, it is real until lock pin 721 slides into the other end of unblock section 112 The folding of existing trolley 100.

According to the trolley 100 of the utility model embodiment, by setting rotation positioning device, rotation positioning device is controlled Switched between lock position and unlocked position can realize cooperation between control vehicle frame front tube 1 and car body branch pipe 3 or Release, can be relatively rotated between vehicle frame front tube 1 and car body branch pipe 3, so as to realize the expansion of vehicle body in the released state And folding so that trolley 100100 is easy to operate, practical, and use reliability is high.Folded when trolley 100100 is in During state, it is convenient for carrying, saves space-consuming.

According to other compositions of the trolley 100 of the utility model embodiment and operate for ordinary skill people All it is known for member, is not detailed herein.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ", The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe Structure, material or feature are contained at least one embodiment or example of the present utility model.In this manual, to above-mentioned art The schematic representation of language is not necessarily referring to identical embodiment or example.Moreover, description specific features, structure, material or Person's feature can combine in an appropriate manner in any one or more embodiments or example.

While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that： These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle and objective of the present utility model, replaced And modification, the scope of the utility model are limited by claim and its equivalent.

Claims (10)

1. A kind of 1. trolley, it is characterised in that including：

   Paired vehicle frame front tube, each vehicle frame front tube are inclined upwardly extension from front to back, before two vehicle frame front tubes End is connected to form U-shaped side arm, and the front bottom end of the U-shaped side arm is provided with front-wheel；

   Managed after paired vehicle frame, managed after each vehicle frame and tilt down extension from front to back, after each vehicle frame before pipe Hold and be rotatablely connected with the centre position of the corresponding vehicle frame front tube, the rear end of pipe is provided with trailing wheel after each vehicle frame；

   Paired car body branch pipe, the front end of each car body branch pipe are connected with the rear end thereof of the corresponding vehicle frame front tube, The rear end of two car body branch pipes is connected to form U-shaped after-frame, and the rear end of the U-shaped after-frame forms handle portion；

   Paired protrusive tube, each protrusive tube extend forward from the front end of the corresponding car body branch pipe and with the car body Branch pipe is fixed as one；

   Paired support tube, the upper end of each support tube are rotatablely connected with the corresponding car body branch pipe, each branch The lower end of stay tube connects with the rear end thereof of pipe after the corresponding vehicle frame, and the support tube is provided with buffer structure；

   Seat mount, the seat mount are detachably connected between two protrusive tubes；

   The changeable rotation positioning device between lock position and unlocked position, the rotation positioning device respectively with the car Frame front tube and the car body branch pipe coordinate, in rotational positioning position described in lock position by the vehicle frame front tube and the car body branch Manage sealed integral, discharge the vehicle frame front tube and the car body branch pipe respectively in rotational positioning position described in unlocked position, when During unblock after the vehicle frame front end of pipe and the support tube upper end can close to be folded each other, after the vehicle frame rear end of pipe with The front end of the vehicle frame front tube close can be folded each other.
2. 2. trolley according to claim 1, it is characterised in that the buffer structure includes：

   Connecting tube, the connecting tube are rotatably connected on after the vehicle frame on pipe, support tube described in the connecting tube overcoat；

   Buffer spring, the buffer spring are enclosed on the support tube outside, and one end of the buffer spring is only against the support Guan Shang, the other end of the buffer spring are only against in the connecting tube.
3. 3. trolley according to claim 2, it is characterised in that the buffer structure also includes：Protection pipe, the protection Pipe is outer to be enclosed on the buffer spring.
4. 4. trolley according to claim 2, it is characterised in that the support tube is provided with sliding groove, the sliding groove Extend along the length direction of the support tube, the connecting pole for connecting pipe after the connecting tube and the vehicle frame coordinates described In sliding groove.
5. 5. trolley according to claim 1, it is characterised in that the rotation positioning device includes：

   Drawing article, the drawing article are movably located on the car body branch pipe；

   Drawstring, one end of the drawstring are located on the drawing article to drive the drawstring to move by the drawing article；

   Lock piece, the lock piece coordinate with the vehicle frame front tube and the car body branch pipe respectively, the other end of the drawstring with The lock piece is connected.
6. 6. trolley according to claim 5, it is characterised in that the lock piece is between lock position and unlocked position It is movably arranged on the car body branch pipe, the lock piece is provided with lock pin；

   The rotation positioning device includes：The elastic component of the lock piece is promoted towards lock position；

   The vehicle frame front tube is provided with loose slot, and the loose slot includes locking section and unblock section, and the unblock section is formed as ring The arc-shaped slot set around pivot center, the locking section are connected with the unblock section, and in unlocked position, the lock pin is matched somebody with somebody Close in the unblock section, at lock position, the lock pin is stuck in the locking section, and the locking section is connected to described Unlock one section of section and formed along the extending radially inwardly for section of unblock.
7. 7. trolley according to claim 6, it is characterised in that the rotation positioning device includes：It is located at the car body Determine clamp on branch pipe, the lock piece be located at the car body branch pipe and it is described determine clamp between, it is described determine clamp be provided with What the lock pin was engaged determine groove, it is described to determine flute profile and turn into strip.
8. 8. trolley according to claim 7, it is characterised in that the rotation positioning device includes：It is located at the vehicle frame Dynamic clamp in front tube, the dynamic clamp be located at the vehicle frame front tube and it is described determine clamp between, the dynamic clamp be provided with The dynamic groove that the lock pin is engaged, the shape of the dynamic groove are identical with the shape of the loose slot.
9. 9. according to the trolley any one of claim 1-8, it is characterised in that the seat mount and the extension Accommodating chamber is limited between pipe, the accommodating chamber includes the first accommodating chamber limited by the protrusive tube and fixed by the seat The second accommodating chamber that frame is limited and connected with first accommodating chamber, the accommodating chamber is interior to be provided with moving member, and the moving member exists It may move between position location and turned position,

   When the moving member is located at the position location, the moving member accommodates with first accommodating chamber, described second respectively Chamber coordinates so that the seat mount and the protrusive tube are fixedly linked；

   When the moving member is located at the turned position, the moving member only with first accommodating chamber and second accommodating chamber In one of cooperation so that the seat mount is pivotably connected with the protrusive tube.
10. 10. trolley according to claim 9, it is characterised in that it is provided with tumbler in first accommodating chamber, described turn Between the seat mount and the moving member, the tumbler rotates moving part between the first position and the second position During, the tumbler promote the moving member to be moved between position location and turned position.