CN213676864U - Handcart with armrest - Google Patents

Abstract

The application discloses take handcart of handrail, including folding frame, the inside lining that forms the accommodation space in folding frame's cloth cover and the wheel subassembly of locating folding frame bottom, folding frame includes four stands that are located folding frame angular position, at least one side is provided with a handrail subassembly around the handcart, handrail subassembly includes that the middle part is provided with first revolute joint and both ends and adjacent coexistence post swing joint's handheld horizontal pole, when the handcart is folding, four stands draw in to the center in, drive handheld horizontal pole fifty percent discount simultaneously. The handrail assembly of this application handcart can the fifty percent discount, and then the handcart can realize drawing in of preceding, back, left and right direction, and the handcart volume after folding up is less, portable.

Description

Handcart with armrest

Technical Field

The application relates to the technical field of folding carts, in particular to a trolley with handrails.

Background

The existing large-capacity folding trolley considers the requirement of bearing capacity, the base is additionally provided with the transverse rod for reinforcement, the handrail is a single handrail, and the baby trolley cannot be folded transversely, for example, the baby trolley and the folding trolley which are provided with the publication number CN 107820472A, CN 209700727U and are used for improving the use convenience, the folding direction of the product is only allowed to be folded along the length direction of the product, the folded appearance is of a plate-shaped structure, and the carrying and the transportation aspects are still limited. The main reason is that the front and rear handrails of the cart cannot be folded.

SUMMERY OF THE UTILITY MODEL

The application provides a handcart with handrails, which can be folded and has small folding volume.

Take handcart of handrail, including folding frame, the inside lining that forms the accommodation space in folding frame's cloth cover and the wheel subassembly of locating folding frame bottom, folding frame includes four stands that are located folding frame angular position, at least one side is provided with a handrail subassembly around the handcart, handrail subassembly includes for folding rod structure and both ends and adjacent coexistence post swing joint's handheld horizontal pole, when the handcart was folding, four stands were drawn in to the center, drive handheld horizontal pole fifty percent discount simultaneously.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the handheld cross bar is provided with a locking mechanism for limiting two sections of the handheld cross bar to rotate relatively, the trolley is kept in an unfolded state when the locking mechanism is locked, and the trolley can be folded after the locking mechanism is unlocked.

Optionally, the middle part of the handheld cross rod is provided with a first rotary joint comprising an upper cross rod rotary part and a lower cross rod rotary part which are connected in a mutually rotating manner, the locking mechanism comprises a stop block which can rotate around a rotation center and is matched with the upper and lower cross rod rotary parts, a second spring which is abutted to the stop block and a top cover which is arranged relative to the second spring, and the stop block is pressed to enable the top cover to be withdrawn from one of the rotary parts.

Optionally, the opposite sides of the edge of the rotation stopping block are provided with locking parts, the upper rotating member and the lower rotating member of the cross rod are provided with locking grooves matched with the locking parts, when the locking parts fall into the locking grooves of the upper rotating member and the lower rotating member of the cross rod, the rotation stopping block limits the relative rotation of the rotation stopping block and the rotation stopping block, and when the locking parts are separated from the locking grooves of one of the parts, the rotation stopping block and the rotation stopping block can rotate relatively.

Optionally, the armrest assembly further comprises two vertical rods with top ends hinged to the end portions of the handheld cross rods, and the vertical rods are arranged in parallel with the upright columns and are fixedly connected with the upright columns.

Optionally, a second rotating joint is arranged on the vertical rod, the vertical rod is divided into an upper section and a lower section, the lower section of the vertical rod is arranged in parallel with the vertical column and is fixedly connected with the vertical column, and the upper section of the vertical rod can rotate around the second rotating joint.

Optionally, the second rotary joint includes an upper rotary member, a lower rotary member and an adjusting mechanism for adjusting an included angle therebetween, the adjusting mechanism includes an adjusting gear rotatably disposed in the joint and capable of rotating around a rotation center, a first spring abutting against the adjusting gear and disposed opposite to the first spring, the adjusting gear is pressed to be disengaged from a side cover of one of the rotary members, and gear rings matched with the adjusting gear are disposed in the corresponding upper and lower rotary members.

Optionally, the folding frame comprises a bottom frame, the bottom frame comprises a central supporting block located in the center and a connecting rod, two ends of the connecting rod are respectively hinged to the central supporting block and the bottoms of the stand columns, and when the trolley is folded, the supporting block moves upwards to drive the four stand columns to approach to the center;

the supporting block is provided with a limiting groove matched with the connecting rods, and the limiting groove limits the connecting rods to turn upwards to enable all the connecting rods to be in the same horizontal plane in the unfolding state of the trolley.

Optionally, a scissor mechanism is arranged between adjacent upright columns, an upper connecting portion and a lower connecting portion which are movably connected with the upright columns are arranged on two sides of the scissor mechanism, the upper connecting portion can move upwards when the trolley is folded, and then the width of the scissor mechanism is reduced.

Optionally, a single scissor mechanism is respectively arranged on the front side and the rear side of the trolley, and a double scissor mechanism is respectively arranged on the left side and the right side of the trolley.

The handrail assembly of this application handcart can the fifty percent discount, and then the handcart can realize drawing in of preceding, back, left and right direction, and the handcart volume after folding up is less, portable.

Drawings

FIG. 1 is an expanded view of the present application of a cart having a handle;

FIG. 2 is an exploded view of the present cart with armrest;

FIG. 3 is a block diagram of the folding frame of the present application;

FIG. 4 is a folded view of the present cart with armrest;

FIG. 5 is a schematic view of a limiting groove structure of the center support block;

FIG. 6 is a cross-sectional view of a first revolute joint;

FIG. 7 is an exploded view of a first revolute joint;

fig. 8 is an exploded view of the second revolute joint.

The reference numerals in the figures are illustrated as follows:

1. a ceiling; 2. cloth sheathing; 3. folding the frame; 4. a wheel assembly;

100. a chassis; 110. a support block; 120. a connecting rod; 110a, a limiting groove;

200. side walls; 210. a lower fixing member; 220. an upper fixing member; 230. a column; 240. a handrail fixing member; 250. a scissor mechanism; 260. a canopy fixing lever; 280. a canopy;

300. an armrest assembly; 301. a vertical rod; 310. a first revolute joint; 320. a hand-held cross bar; 330. the upper section of the vertical rod; 340. a second revolute joint; 350. the lower section of the vertical rod;

310a, a second spring; 310b, a cross bar upper rotating piece; 310c, a rotation stopping block; 310d, a cross bar lower rotating piece;

310e, a top cover;

340a, a side cover; 340b, an upper section rotating piece; 340c, an adjusting gear; 340d, a lower segment rotating member;

340e, a lower section covering piece; 340f, an upper section covering piece;

410. a front wheel; 420. a rear wheel; 430. a brake pedal.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In this application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any particular order or number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The handcart comprises a folding frame 3 forming an accommodating space, a cloth sleeve 2 lining the folding frame 3 and a wheel assembly 4 arranged at the bottom of the folding frame, and the folding frame 3 comprises an underframe 100 and four stand columns 230 positioned at the corners of the folding frame, see fig. 1. As shown in fig. 3 and 4, the cart has two states, unfolded and folded.

In one embodiment, the cart includes an armrest assembly 300 and a canopy 1. For convenience of description and understanding, the front and rear sides are defined as the sides where the handle assembly 300 is located, and the left and right sides are perpendicular to the front and rear sides according to usage habits.

Referring to fig. 2 and 3, the bottom frame 100 has an X-shaped unfolded shape, and includes a supporting block 110 located at the center and four connecting rods 120 radially arranged and connected to the supporting block 110 through a hinge structure, the supporting block 110 is provided with a limiting groove 110a matched with the connecting rod 120, the end of the connecting rod 120 is received in the limiting groove 110a, the bottom of the limiting groove 110a is open, the top is closed, and both sides are rotatably connected to the connecting rod 120 through pivots, referring to fig. 5, in the unfolded state of the cart, the groove wall of the closed side of the limiting groove 110a abuts against the connecting rod 120, so as to limit the connecting rod 120 from turning upwards.

Because the cloth cover 2 has the functions of containing and blocking, the side wall is not needed to be arranged under certain conditions, and the cloth cover 2 is only needed to be hung on the upright post. However, to enhance load bearing capacity, in some embodiments, the folding frame further includes a scissors mechanism 250 disposed between adjacent uprights 230 to form siderails 200.

The scissor fork mechanism can be a single scissor fork, a double scissor fork or a multi-scissor fork. The single-scissor mechanism consists of a pair of crossed and rotatably connected connecting rods, the two connecting rods are generally equal in length, the rotating connecting shaft is arranged in the middle of the two connecting rods, and the width and the length of the rotating connecting shaft can be changed along with the change of the included angle of the two connecting rods. The multi-scissor mechanism is formed by connecting a plurality of single scissor mechanisms in series, each scissor mechanism is provided with a pair of upper connecting parts and a pair of lower connecting parts which are movably connected to the upright post, and the multi-scissor mechanism is formed by rotatably connecting the upper connecting parts and the lower connecting parts of two adjacent single scissor mechanisms in a corresponding mode.

Obviously, the side gusset 200 may be formed by other structures, such as two folding rods, when the upright posts are closed, the two parts of the two folding rods rotate relatively, and the rotating joints move upwards. A plurality of parallel two folding rods can be arranged in the same vertical plane, but the two folding rod structure has the defect that the gap of the rod pieces is too large and is not enough to support the cloth cover 2 relative to the scissor fork structure.

In one embodiment, the upright 230 is provided with upper and lower fixing members, and the upper and lower connecting portions at two sides of the scissors mechanism 250 are respectively hinged to the upper and lower fixing members, so that when the cart is folded, the upper connecting portion moves upward. The distal ends of the four connecting rods 120 of the base frame 100 are hinged to the lower fixture 210. It is apparent that the connecting rod 120 and the lower connecting portion may be directly connected with the pillar.

In one embodiment, the upright 230 is a telescopic rod structure, and the upper fixing member 220 is located at the top end of the upright 230. The telescopic rod structure means that the upright post is divided into an upper section and a lower section, wherein one section can move along the length direction relative to the other section, so that the length of the upright post can be adjusted, and the two sections of the upright post structure can be on the same straight line or on two parallel straight lines.

In one embodiment, the upper fixing member is a sliding sleeve disposed on the upright 230, and the upper connecting portion of the scissors mechanism 250 is hinged to the sliding sleeve.

In one embodiment, the upper fixing member is a link hinged to the pillar 230 and the upper connecting portion.

In one embodiment, the upper connecting portion of the scissors mechanism has a sliding pin, and the corresponding upright 230 is provided with a sliding slot along its length.

In one embodiment, the cart is provided with a handle assembly on each of the front and rear sides, although it could be provided on only one of the sides. The armrest assembly 300 includes a hand-held cross bar 320 extending along the left and right sides of the foldable frame, the hand-held cross bar 320 having a folding bar structure with two ends movably connected to the adjacent two upright posts 230, and the hand-held cross bar 320 is folded in half in the folded state of the stroller.

In one embodiment, referring to fig. 6 and 7, the middle of the handheld cross bar 320 is provided with a first rotating joint 310, and the first rotating joint 310 comprises a cross bar upper rotating member 310b and a cross bar lower rotating member 310d which are rotatably connected, and a locking mechanism for limiting the relative rotation of the two members is arranged between the two members. The locking mechanism includes a stopper 310c which can rotate around the center of rotation and the upper and lower rotary members of the crossbar are engaged, a second spring 310a abutting against the stopper 310c, and a top cover 310e provided opposite to the second spring 310a and which is withdrawn from one of the rotary members by pressing the stopper 310 c.

The surface of the cross rod lower rotating piece 310d is provided with a depressed area matched with the excircle of the top cover 310e, the inner surface of the depressed area is provided with a avoiding hole matched with the column block, the top cover 310e is embedded in the depressed area and is connected with the cross rod lower rotating piece 310d through a buckle, and the top cover 310e is embedded in the depressed area and can move along the axis direction of the top cover. After the top cover 310e is pressed, the column block passes through the avoiding hole and presses the rotation stopping block 310c, so that the column block can be separated from the lower rotating piece of the cross rod.

The internal structures of the upper and lower rotating members of the cross bar are provided with structures matched with the shapes of the rotation stopping blocks 310c, as shown in fig. 6 and 7, the edges of the rotation stopping blocks 310c are provided with two oppositely arranged locking parts, and the corresponding lower rotating member 310d of the cross bar and the upper rotating member 310b of the cross bar are provided with locking grooves matched with the locking parts.

The upper rotating piece and the lower rotating piece of the cross rod are connected through rivets, a cavity which enables the rotation stopping block 310c to move along the axis direction is formed inside the upper rotating piece 310b of the cross rod, a second spring 310a is clamped inside the upper rotating piece 310b of the cross rod, one end of the second spring 310a abuts against one side face of the rotation stopping block 310c, the other side face of the rotation stopping block 310c is in contact with the inner surface of the lower rotating piece 310d of the cross rod, and the locking portion falls into the locking grooves of the upper rotating piece and the lower rotating piece of the cross rod, so that the upper rotating piece and the lower rotating piece of the cross rod are limited by the rotation.

In the unfolded state, the stopper 310c abuts against the inner surface of the cross bar lower rotating member 310d due to the force of the second spring 310a, and the hand-held cross bar 320 is restricted from being folded due to the fitting structure of the stopper 310c and the cross bar upper and lower rotating members.

When folding is required, the top cover 310e is pressed, the rotation stopping block 310c is pushed by the column block to move downwards, and the second spring 310a is compressed until the rotation stopping block 310c is completely separated from the cross bar lower rotating piece 310e, so that the cross bar upper and lower rotating pieces can rotate relatively.

The locking mechanism is equivalent to a locking mechanism of a trolley, when the locking mechanism is in a locking state, the trolley keeps an unfolding state, and when the trolley is folded, the locking mechanism needs to be unlocked, and due to the assembly clearance, the handheld cross bar can be slightly bent to keep the locking mechanism in the unlocking state, and then the supporting block 110 is pulled up to complete folding as described above.

The first rotating joint 310 is a rotating hinge structure with a limiting function, so that the whole vehicle can be folded in the width direction, and the handheld transverse rod can be prevented from being reversely turned over in a normal use state.

The handrail component further comprises two vertical rods 301 with top ends hinged to the end portions of the handheld cross rods 320, the vertical rods 301 are fixedly connected with the upright posts 230, when the trolley is folded, the two vertical rods 301 are close to each other along with the movement of the upright posts, and the handheld cross rods 320 can be parallel to the two vertical rods 301 after being folded in half or not parallel.

In one embodiment, the vertical rod 301 is further provided with a second rotating joint 340, and the vertical rod 301 is divided into an upper section 330 and a lower section 350, which are the upper section 330 and the lower section 350 of the vertical rod, respectively, wherein the lower section 350 of the vertical rod is fixedly connected with the vertical column 230, and the upper section 330 of the vertical rod can rotate around the second rotating joint 340 to adjust the height of the handheld cross rod 320, so as to meet the requirements of most users.

In one embodiment, in order to improve the connection strength, the vertical rod 301 and the upright 230 are arranged side by side, and the vertical rod 301 extends to the bottom of the upright 230 and is connected with the lower fixing member 210. Still be provided with handrail mounting 240 between montant 301 and the stand 230, handrail mounting 240 has two holes of dodging, overlaps respectively in the interlude of stand 230 and montant 301 to fix with the rivet, realize that the fixed stability that promotes handrail assembly 300 of multiple spot.

In one embodiment, referring to fig. 8, the second rotating joint 340 includes an upper rotating member 340b, a lower rotating member 340d, and an adjusting mechanism for adjusting an included angle therebetween, the adjusting mechanism includes an adjusting gear 340c rotatably disposed in the joint and rotatable around a center of rotation, a first spring (not shown) abutting against the adjusting gear 340c, and a gear ring disposed in the corresponding upper and lower rotating members and configured to be engaged with the adjusting gear, and the adjusting gear is pressed to disengage from the side cover 340a of one of the rotating members.

Wherein be provided with the boss in the side cap 340a to and the buckle of mutually supporting with upper segment rotating member 340b, upper segment rotating member 340b surface is provided with a depressed area, and the through-hole that suits with the boss, the interior circle of this depressed area suits with the excircle of side cap 340a, supplies side cap 340a to remove along its axle center direction. After the side cover 340a is pressed, the circular boss passes through the avoiding hole and presses the adjusting gear 340c, so that the circular boss can be separated from the upper-section rotating piece 340 b.

The adjusting gear 340c is a gear with a through hole in the middle, a part matched with the gear ring and the side surface of the adjusting gear 340c is arranged in the upper section rotating piece 340b, the adjusting gear 340c can move on the upper section rotating piece 340b along the axis of the upper section rotating piece 340b, the adjusting gear 340c is sleeved in a lower section rotating piece 340d which is provided with a first spring and matched with the gear ring of the adjusting gear 340c, and the elastic piece is abutted between the adjusting gear 340c and the lower section rotating piece 340 d.

The lower section covering piece 340e is abutted against the outer surface of the lower section rotating piece 340d, the lower section of the vertical rod 350 is inserted into the lower section rotating piece 340d, the lower section covering piece 340e, the lower section rotating piece 340d and the lower section of the vertical rod 350 are fastened by rivets, the upper section covering piece 340f is abutted against the surface of the lower section covering piece 340e, the upper section of the vertical rod 330 is inserted into the upper section rotating piece 340b, and the upper section covering piece 340f, the upper section rotating piece 340b and the upper section of the vertical rod 330 are fixed by rivets.

The second revolute joint further includes a rivet (not shown) penetrating all the components (except the side cover 340a) and rotatable about the axis of the rivet.

When the handcart is in an unfolded state, the adjusting gear 340c is positioned between the upper section rotating piece and the lower section rotating piece due to the acting force of the elastic piece and the matched limiting surface of the upper section rotating piece 340b, and is limited by the gear ring structure, so that the upper section rotating piece and the lower section rotating piece cannot rotate relatively. When the rotation adjustment is needed, the side cover 340a is pressed down, the side cover 340a moves downwards, the round boss moves the adjusting gear 340c to the lower section rotating piece 340d, the first spring is compressed until the upper section rotating piece 340b is disengaged, the upper section rotating piece 340b can rotate around the axis of the rivet, after the height of a user is adjusted to be suitable, the side cover 340a is released, the first spring extends to drive the adjusting gear 340c to reset, and the upper section rotating piece and the lower section rotating piece can not rotate relatively.

Adjustable's handrail assembly 300 has realized that the handcart when using, can press swivel button back height-adjusting according to different shallow personnel's the health condition, promotes high-quality product and experiences and feels.

The wheel assembly 4 includes a front wheel 410 and a rear wheel 420, wherein the front wheel 410 is a universal wheel, the rear wheel 420 is a directional wheel, and each of the front wheel 410 and the rear wheel 420 has a brake pedal 430 for controlling the brake to be turned on or off, and the wheel assembly 4 is inserted into and connected to the bottom of the lower fixing member 210.

The unfolding structure of the cloth cover 2 is a cuboid structure with an open top surface, the cloth cover is lined inside the folding frame and is fixed on the upright post 230, the lower fixing piece 210 and the underframe through buckles, and the center of the bottom surface of the cloth cover 2 is fixed with the supporting block 110 through fasteners.

The top of the canopy cover has an inclination, and the canopy fixing rod 260 is sleeved on the periphery through the self-tension force of the canopy cover 280, and the canopy fixing rod 260 is fixedly inserted into the upper fixing member 220 and is also in an upright state.

When the folding and folding awning is carried out, the awning 1 is taken down, the awning cover 280 is made of flexible material, so that the folding and the storage are convenient, the brake pedal 430 is lifted up, the brake is closed, so that the wheel assembly 4 can roll, the central accessory area at the bottom of the cloth cover 2 is grabbed by one hand, a lifting rope convenient to lift is generally arranged, the supporting block 110 is lifted upwards, the two ends of the connecting rod 120 rotate and pull the four lower fixing pieces 210 to horizontally move towards the center to drive the side wall 200 to be folded, and the first rotating joint 310 in the middle of the handheld cross rod 320 rotates (under the condition of pre-unlocking) along with the contraction of the side wall 200 in the length direction, meanwhile, the hinged structure of the handheld cross rod 320 and the upper section 340 of the vertical rod also rotates, the two rotating structures rotate, the hand-held cross bar 320 is folded and the vertical bars 301 are drawn together until the cart is folded into a column (see fig. 4), and the folded volume is 40% of the unfolded volume.

When the handrail component needs to be used, the supporting block 110 is pressed downwards by one hand, the two ends of the connecting rod 120 rotate, the lower fixing piece 210 is pushed to move on the horizontal plane away from the center direction, the side wall 200 is unfolded, the handrail component 300 is also opened, and the operation is finished until the limiting groove 110a of the supporting block 110 is pressed against the connecting rod 120.

Comparatively speaking, this application still has realized width direction's folding with the folding car that can only fold on length direction, and the one hand accomplishes folding operation, and is convenient quick.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims (10)

1. Take handcart of handrail, including the folding frame who forms the accommodation space, inside lining in folding frame's cloth cover and locate the wheel subassembly of folding frame bottom, folding frame includes four stands that are located folding frame angular position, its characterized in that, at least one side is provided with a handrail subassembly around the handcart, handrail subassembly includes for folding rod structure and both ends and adjacent coexistence post swing joint's handheld horizontal pole, when the handcart was folding, four stands were drawn in to the center, drove the handheld horizontal pole fifty percent discount simultaneously.

2. A stroller according to claim 1, wherein the hand-held cross bar has a locking mechanism for limiting relative rotation of the two sections of the hand-held cross bar, the locking mechanism being adapted to lock the stroller in the extended position, and the locking mechanism being adapted to unlock the stroller to permit folding of the stroller.

3. A trolley as claimed in claim 2, characterized in that the hand-held crossbar is provided in the middle with a first rotary joint comprising an upper crossbar swivel and a lower crossbar swivel, which are rotatably connected to each other, and that the locking mechanism comprises a stop block which is rotatable about the centre of rotation and which cooperates with the upper and lower crossbar swivels, a second spring which abuts against the stop block and is arranged opposite the second spring, and which is pressed out of the top cover of one of the swivels.

4. A trolley as claimed in claim 3, wherein the locking portions are provided on opposite sides of the edge of the locking piece, and the upper and lower rotary members of the crossbar are provided with locking grooves which engage with the locking portions, so that the locking piece restricts relative rotation of the upper and lower rotary members of the crossbar when the locking portions are received in the locking grooves of the upper and lower rotary members, and allows relative rotation of the upper and lower rotary members when the locking portions are disengaged from the locking grooves of one of the members.

5. A trolley as claimed in claim 1, characterized in that the arm rest assembly further comprises two vertical bars, the top ends of which are hinged to the ends of the hand-held cross bars, the vertical bars being arranged parallel to and fixedly connected to the upright.

6. A trolley as claimed in claim 5, characterized in that the vertical bar is provided with a second swivel joint, which divides the vertical bar into an upper and a lower section, wherein the lower section of the vertical bar is arranged parallel to and fixedly connected with the vertical bar, and the upper section of the vertical bar can swivel around the second swivel joint.

7. A trolley according to claim 6, characterized in that the second swivel joint comprises an upper swivel part, a lower swivel part and an adjusting mechanism for adjusting the angle between the two, the adjusting mechanism comprising an adjusting gear rotatably arranged in the joint about a swivel centre, a first spring abutting against the adjusting gear and arranged opposite the first spring, the adjusting gear being pressed out of the side cover of one of the swivel parts, and gear rings arranged in the respective upper and lower swivel parts for co-operation with the adjusting gear.

8. The cart of claim 1, wherein the folding frame comprises a bottom frame, the bottom frame comprising a central support block at the center and a connecting rod hinged at each end to the central support block and the bottom of the upright, the support blocks moving upward to draw the four uprights together toward the center when the cart is folded;

the supporting block is provided with a limiting groove matched with the connecting rods, and the limiting groove limits the connecting rods to turn upwards to enable all the connecting rods to be in the same horizontal plane in the unfolding state of the trolley.

9. A wheelbarrow according to claim 1, wherein a scissor mechanism is provided between adjacent uprights, the scissor mechanism having upper and lower connecting portions on either side thereof which are pivotally connected to the uprights, the upper connecting portion being movable upwardly when the wheelbarrow is collapsed to thereby reduce the width of the scissor mechanism.

10. A trolley as claimed in claim 9, characterized in that the trolley is provided with a single scissor mechanism on each of the front and rear sides, and a double scissor mechanism on each of the left and right sides.

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