Folding shopping cart with simple extensible desktop

Abstract

The utility model discloses a folding shopping cart with a simple extensible desktop, which comprises a box body and a box cover, and the box cover can be arranged at the top of the box body to form a first storage plane; an expansion plate is arranged on the front panel, the upper end of the expansion plate is hinged to the upper end of the front panel, and a foldable and unfoldable supporting leg assembly is hinged to the inner side face of the expansion plate; the expansion plate is unfolded to a horizontal position relative to the front panel to form an expanded storage plane; the supporting leg assemblies are unfolded outwards relative to the expansion board and incline from top to bottom and from inside to outside so that the expansion board can be kept at the horizontal position. The first object placing plane and the expanded object placing plane can form a second object placing plane; the expansion plate is folded relative to the front panel, a storage cavity is formed between the expansion plate and the front panel, and the supporting leg assembly is folded relative to the expansion plate and stored in the storage cavity; the supporting device has the advantages of forming an extended object placing plane, being simple in structure and action logic, convenient to operate, stable in supporting and low in production cost.

Description

Technical Field

[0001] The utility model relates to a foldable shopping cart, in particular to a foldable shopping cart with a simple expandable desktop. The expandable desktop is added to the side plate of the foldable shopping cart, and the needs of outdoor activity storage, transportation and placement are met at the same time. Background Art

[0002] A foldable shopping cart is a movable and portable storage device comprising a box body, a box cover, a pull rod and movable wheels. It is often used in scenarios such as going out shopping, buying groceries, and outdoor camping.

[0003] For example, the utility model patent with authorization announcement number CN214340624U discloses a rotating connection structure between a box lid and a box body and a shopping box, which includes a rotating part connected to a side wall of the box body and a connecting part arranged on the inner side of the box lid. The box lid can be rotated within a vertical reference plane where the vertical state is located. When the box lid is rotated and opened to a vertical state and is located outside the vertical plane where the side wall of the box body is located, the items in the box body can be taken out. When the box lid is rotated and closed on the box body, the upper surface of the box lid can be used as a desktop for placing items.

[0004] However, if you want to take out the items in the box, you need to move the items on the box cover before you can open the box cover, which is very inconvenient in outdoor scenes. Therefore, a foldable shopping box with an expandable desktop on the side of the box has appeared on the market. The corresponding patent document is a utility model patent with authorization announcement number CN219515599U, which discloses a foldable box-type outdoor table, including a box, at least one side of the box is provided with an expansion surface, the expansion surface is provided to include a folded state and an unfolded state, a support assembly is provided at the bottom of the expansion surface, the expansion surface is connected to the side through the support assembly, the support assembly includes a first support structure, a second support structure, and a third support structure, the other end of the first support structure is movably connected to the expansion surface, the other end of the second support structure is movably connected to the side, the other end of the third support structure is used to contact the ground, and the connection structure is also provided with a first spring and a second spring.

[0005] Although the design of this expansion surface solves the desktop expansion problem of the foldable shopping cart, its structure is too complicated. First, the three groups of support structures are connected by a connecting structure, and the action logic when folding and unfolding is too complicated, which is prone to jamming during operation; second, the setting of springs in the three groups of support structures and the connecting structure makes the parts numerous, which is prone to damage and missing parts during use; third, this patented product actually uses metal frames as its three groups of support structures on the market, which has high material costs and complex processes during production, poor stability during use, and is prone to shaking when heavy objects are placed. Utility Model Content

[0006] In view of the problems that the existing foldable shopping carts with expandable desktops have numerous parts, complex action logic, high production costs, and weak stability, the technical problem to be solved by the utility model is to provide a foldable shopping cart with a simple expandable desktop with simplified structure, improved stability, and reduced cost.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a foldable shopping cart with a simple expandable desktop, comprising a box body and a box cover, wherein the box body comprises a bottom plate, a front panel, a rear panel, a left folding plate, and a right folding plate to enclose a storage space of the box body; the box cover can be placed on the top of the box body to close the storage space and form a first storage plane;

[0008] The front panel is provided with an expansion board, the upper end of the expansion board is hinged to the upper end of the front panel, and the inner side surface of the expansion board is hinged with a foldable and unfoldable support leg assembly;

[0009] The expansion board is unfolded to a horizontal position relative to the front panel to form an extended storage plane; the support leg assembly is unfolded outward relative to the expansion board and tilted from top to bottom and from inside to outside to keep the expansion board in a horizontal position; the first storage plane can form a second storage plane with the extended storage plane;

[0010] The expansion plate is folded relative to the front panel, a storage cavity is formed between the expansion plate and the front panel, and the support leg assembly is folded relative to the expansion plate and stored in the storage cavity.

[0011] The preferred technical solution adopted by the utility model to solve the above technical problems is: the support leg assembly comprises a first support leg and a second support leg parallel to each other;

[0012] The first leg comprises an upper leg and a lower leg, the upper leg is hinged to the inner side of the expansion plate, and a joint structure is provided between the upper leg and the lower leg; the joint structure comprises an axle seat at the lower end of the upper leg and a rotating shaft at the upper end of the lower leg, the rotating shaft is rotatably hinged in the axle seat, so that the lower leg can be rotated relative to the upper leg to be unfolded or folded;

[0013] A limiting structure is provided between the upper supporting leg and the lower supporting leg to limit the lower supporting leg to rotate only between 0° and 180° relative to one side of the upper supporting leg;

[0014] The second supporting leg has the same structure as the first supporting leg.

[0015] The preferred technical solution adopted by the utility model to solve the above-mentioned technical problems is: the limiting structure includes a groove at the lower end of the upper leg and a protrusion at the upper end of the lower leg; a limiting surface is provided on the inner side of the groove; when the lower leg is rotated to 180° relative to the upper leg, the protrusion enters the groove, and the protrusion abuts against the limiting surface to prevent the lower leg from continuing to rotate in the same direction.

[0016] The preferred technical solution adopted by the utility model to solve the above-mentioned technical problem is: the limiting structure includes a limiting snap-in at the lower end of the upper leg and an arc-shaped protrusion at the upper end of the lower leg; when the lower leg is rotated to 180° relative to the upper leg, the arc-shaped protrusion is inserted into the limiting snap-in to keep the upper leg and the lower leg at a 180° position.

[0017] The preferred technical solution adopted by the utility model to solve the above technical problems is: the inner side surface of the expansion board is concavely provided with a first receiving groove, the outer side surface of the front panel is correspondingly concavely provided with a second receiving groove, the expansion board is closed relative to the front panel, and the first receiving groove and the second receiving groove are connected to form the receiving cavity;

[0018] The supporting leg assembly is hinged at the lower end of the first receiving slot; a limiting plate is provided at the lower end of the first receiving slot, and the supporting leg assembly is expanded outward relative to the expansion plate, and the limiting plate abuts against the supporting leg assembly to limit the supporting leg assembly in a position inclined from top to bottom and from inside to outside.

[0019] The preferred technical solution adopted by the utility model to solve the above technical problems is: an upper crosspiece is provided between the lower end of the upper leg of the first leg and the lower end of the upper leg of the second leg, and a lower crosspiece is provided between the lower end of the lower leg of the first leg and the lower end of the lower leg of the second leg;

[0020] The two upper legs and the upper crossbar form an upper leg assembly, the two lower legs and the lower crossbar form a lower leg assembly, and the lower leg assembly is rotated and folded relative to the upper leg assembly to form a mouth-shaped frame;

[0021] The first receiving groove is a mouth-shaped groove, which has a rectangular protrusion matching the shape of the mouth-shaped frame, the support leg assembly is folded relative to the expansion plate, and the rectangular protrusion is embedded in the mouth-shaped frame;

[0022] The second receiving groove is a rectangular groove.

[0023] Another technical solution adopted by the utility model to solve the above technical problems is: a foldable shopping cart with a simple expandable desktop, comprising a box body and a box cover, wherein the box body comprises a bottom plate, a front panel, a rear panel, a left folding plate, and a right folding plate to enclose a storage space of the box body; the box cover can be placed on the top of the box body to close the storage space, the bottom of the box body is provided with moving wheels, and the rear panel is provided with a pull rod;

[0024] The front panel is provided with an expansion board, the upper end of the expansion board is hinged to the upper end of the front panel, and the inner side surface of the expansion board is hinged with a foldable and unfoldable support leg assembly;

[0025] The supporting leg assembly comprises an upper supporting leg assembly and a lower supporting leg assembly, the upper end of the upper supporting leg assembly is hinged to the inner side surface of the expansion plate, and the lower supporting leg assembly can be rotated relative to the upper supporting leg assembly to be unfolded or folded;

[0026] The expansion board is unfolded to a horizontal position relative to the front panel to form an expanded storage plane; the support leg assembly is unfolded outward relative to the expansion board, the lower support leg assembly is unfolded to 180° relative to the upper support leg assembly, and the support leg assembly is tilted from top to bottom and from inside to outside to keep the expansion board in a horizontal position;

[0027] The expansion plate is folded relative to the front panel, a storage cavity is formed between the expansion plate and the front panel, the lower leg assembly is folded relative to the upper leg assembly, and the supporting leg assembly is folded relative to the expansion plate and stored in the storage cavity.

[0028] Another technical solution adopted by the utility model to solve the above technical problem is preferably: the support leg assembly includes a first leg and a second leg parallel to each other;

[0029] The first leg comprises an upper leg and a lower leg, the upper leg is hinged to the inner side of the expansion plate, and a joint structure is provided between the upper leg and the lower leg; the joint structure comprises an axle seat at the lower end of the upper leg and a rotating shaft at the upper end of the lower leg, the rotating shaft is rotatably hinged in the axle seat, so that the lower leg can be rotated relative to the upper leg to be unfolded or folded;

[0030] The second leg has the same structure as the first leg;

[0031] An upper crosspiece is provided between the lower end of the upper leg of the first leg and the lower end of the upper leg of the second leg, and a lower crosspiece is provided between the lower end of the lower leg of the first leg and the lower end of the lower leg of the second leg;

[0032] The two upper legs and the upper crossbar form an upper leg assembly, and the two lower legs and the lower crossbar form a lower leg assembly.

[0033] Another technical solution adopted by the utility model to solve the above technical problem is preferably: a limiting structure is provided between the upper leg assembly and the lower leg assembly to limit the lower leg assembly to rotate only between 0° and 180° relative to one side of the upper leg assembly;

[0034] The limiting structure includes a groove at the lower end of the upper leg assembly and a protrusion at the upper end of the lower leg assembly; a limiting surface is provided on the inner side of the groove; when the lower leg assembly rotates to 180° relative to the upper leg, the protrusion enters the groove and abuts against the limiting surface to prevent the lower leg assembly from continuing to rotate in the same direction.

[0035] Another technical solution adopted by the utility model to solve the above-mentioned technical problem is preferably: a limiting snap-in is provided between the top wall of the groove and the limiting surface, and an arc-shaped protrusion is provided on the top of the protrusion; when the lower leg assembly is rotated to 180° relative to the upper leg assembly, the arc-shaped protrusion passes over the top wall of the groove and is inserted into the limiting snap-in, so that the upper leg assembly and the lower leg assembly are maintained at a 180° position.

[0036] Another technical solution adopted by the utility model to solve the above technical problem is preferably: the inner side surface of the expansion board is concavely provided with a first receiving groove, and the outer side surface of the front panel is correspondingly concavely provided with a second receiving groove, and the expansion board is closed relative to the front panel, and the first receiving groove and the second receiving groove are connected to form the receiving cavity;

[0037] The supporting leg assembly is hinged at the lower end of the first receiving slot; a limiting plate is provided at the lower end of the first receiving slot, and the supporting leg assembly is expanded outward relative to the expansion plate, and the limiting plate abuts against the supporting leg assembly to limit the supporting leg assembly in a position inclined from top to bottom and from inside to outside.

[0038] Another technical solution adopted by the utility model to solve the above technical problem is preferably: the lower leg assembly is rotated and folded relative to the upper leg assembly to form a mouth-shaped frame;

[0039] The first receiving groove is a mouth-shaped groove, which has a rectangular protrusion matching the shape of the mouth-shaped frame, the support leg assembly is folded relative to the expansion plate, and the rectangular protrusion is embedded in the mouth-shaped frame;

[0040] The second receiving groove is a rectangular groove.

[0041] Compared with the prior art, the advantages of the present invention are: by hingedly connecting the expansion panel to the front panel, when the expansion panel is unfolded to a horizontal position relative to the front panel, an expanded storage plane is formed, which can be used as a desktop alone without affecting the use of the storage space of the box body, and can also form a second storage plane together with the first storage plane formed by the box cover, thereby expanding the total area of ​​the storage plane that can be used for placing items and meeting the needs of users in various usage scenarios.

[0042] At the same time, by hingedly connecting a foldable and unfoldable support leg assembly on the inner side of the expansion board, the support leg assembly is only hinged to the expansion board and has no connection with the front panel. It only needs to be unfolded outward relative to the expansion board to support the expansion board in a top-down and inside-out tilted manner. Therefore, the structure, connection relationship and action logic are simple, and there are no scattered parts. The unfolding and folding operations are convenient during use, the support is stable, and it is not easy for the connection and rotation joints to be damaged or the parts to be lost or scattered. The material is saved during production and the process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0044] Figure 1 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 1 ;

[0045] Figure 2 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 2 ;

[0046] Figure 3 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 3 ;

[0047] Figure 4 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 4 ;

[0048] Figure 5 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 5 ;

[0049] Figure 6 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 6 ;

[0050] Figure 7 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 7 ;

[0051] Figure 8 A schematic diagram of the structure of a foldable shopping cart with a simple expandable tabletop Figure 8 ;

[0052] Description of reference numerals:

[0053] A foldable shopping cart 100 with a simple expandable desktop, a box body 110, a box cover 120, a bottom plate 111, a rear panel 112, a left folding plate 113, a right folding plate 114, a storage space s, a moving wheel 130, a pull rod 140, a first storage plane p1, a front panel 10, a limiting plate 21, a rectangular protrusion 22, an expansion plate 20, an expansion storage plane p2, a second storage plane p3, a first storage slot q1, a second storage slot q2, a storage cavity q, and a support leg Component 30, upper leg component 30u, lower leg component 30d, first leg 31, upper leg 31u of the first leg, lower leg 31d of the first leg, second leg 32, upper leg 32u of the second leg, lower leg 32d of the second leg, upper cross piece 33, lower cross piece 34, mouth frame k, joint structure 40, shaft seat 41, rotating shaft 42, limiting structure 50, groove 51, protrusion 52, limiting surface 53, limiting bayonet 54, arc-shaped protrusion 55. DETAILED DESCRIPTION

[0054] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0055] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. "First" and "second" are only for the purpose of making the description easier to understand, without any other directional meaning, and cannot be used as a limitation on the present utility model.

[0056] like Figures 1 to 8The foldable shopping cart 100 with a simple expandable desktop provided in this embodiment includes a box body 110 and a box cover 120, wherein the box body 110 includes a bottom plate 111, a front panel 10, a rear panel 112, a left folding plate 113, and a right folding plate 114 to enclose a storage space s of the box body. When the left folding plate 113 and the right folding plate 114 are unfolded, the storage space s can be used to store items. The bottom plate 111 is flipped up and stored in the storage space s, the left folding plate 113 and the right folding plate 114 are folded relative to each other, and the front panel 10 and the rear panel 112 are butted and matched to facilitate the storage of the foldable shopping cart.

[0057] The bottom of the box 110 is provided with a moving wheel 130, and the rear panel 112 is provided with a pull rod 140, so that the user can walk with the unfolded foldable shopping cart by holding the pull rod 140. Since the left foldable plate 113 and the right foldable plate 114 need to be folded and unfolded, the pull rod 140 is arranged on the non-foldable rear panel 112.

[0058] The box cover 120 can be placed on the top of the box body 110 to close the accommodating space s and form a first storage plane p1 to meet the needs of users to place items on the first storage plane p1 for use as a desktop.

[0059] like Figures 1 to 3 As shown, an expansion board 20 is arranged on the front panel 10, the upper end of the expansion board 20 is hinged to the upper end of the front panel 10, and a foldable and unfoldable support leg assembly 30 is hinged to the inner side of the expansion board 20. The expansion board 20 is unfolded to a horizontal position relative to the front panel 10 to form an extended storage plane p2, and the support leg assembly 30 is unfolded outward relative to the expansion board 20 and tilted from top to bottom and from inside to outside to keep the expansion board 20 in a horizontal position.

[0060] At this time, when the box cover 120 is placed on the top of the box body 110 to form a first storage plane p1, the first storage plane p1 can form a second storage plane p3 with the extended storage plane p2, thereby expanding the total area of ​​the storage plane that can be used to place items. When the box cover 120 is removed from the top of the box body 110, the extended storage plane p2 can still be used alone to place items as a desktop, without affecting the user taking off the box cover 120 to take items from the storage space s.

[0061] like Figure 7 and Figure 8 As shown, the expansion board 20 is folded relative to the front panel 10, a storage cavity q is formed between the expansion board 20 and the front panel 10, and the support leg assembly 30 is folded relative to the expansion board 20 and stored in the storage cavity q.

[0062] It should be noted that, since the left folding plate 113 and the right folding plate 114 need to be folded and unfolded, they are arranged on the non-foldable front panel 10, and preferably, the expansion plate 20 and the pull rod 140 are respectively arranged on two opposite and non-foldable panels, so as not to affect each other's use. For example, in other embodiments, the expansion plate 20 may be arranged on the rear panel 112, and the pull rod 140 may be arranged on the front panel.

[0063] It can be seen that the foldable shopping cart 100 with a simple expandable desktop provided by the utility model, by hingedly connecting the expansion plate 20 to the front panel 10, when the expansion plate 20 is unfolded to a horizontal position relative to the front panel 10, an expanded storage plane p2 is formed, which can be used as a desktop alone without affecting the use of the storage space s of the box body 110, and can also form a second storage plane p3 together with the first storage plane p1 formed by the box cover 120, thereby expanding the total area of ​​the storage plane that can be used to place items, meeting the needs of users in various usage scenarios.

[0064] At the same time, by hingedly connecting the foldable and unfoldable support leg assembly 30 on the inner side of the expansion plate 20, the support leg assembly 30 is only hinged to the expansion plate 20, and has no connection with the front panel 10, and only needs to be unfolded outward relative to the expansion plate 20 to support the expansion plate 20 in a top-down and inside-out tilted manner, so that the structure, connection relationship and action logic are simple, there are no scattered parts, the unfolding and folding operations are convenient during use, the support is stable, and it is not easy for the connection and rotation joints to be damaged or the parts to be lost and scattered. The material is saved during production and the process is simple.

[0065] like Figures 1 to 3 As shown, the support leg assembly 30 includes an upper support leg assembly 30u and a lower support leg assembly 30d. The upper end of the upper support leg assembly 30u is hinged to the inner side of the expansion board 20, and the lower support leg assembly 30d can be rotated to unfold or fold relative to the upper support leg assembly 30u. When the expansion storage plane p2 is needed, the expansion board 20 is unfolded to a horizontal position relative to the front panel 10, the support leg assembly 30 is unfolded outward relative to the expansion board 20, and the lower support leg assembly 30d is unfolded to 180° relative to the upper support leg assembly 30u. Thus, the support leg assembly 30 is tilted from top to bottom and from inside to outside as a whole to keep the expansion board 20 in a horizontal position.

[0066] like Figures 4 to 8As shown, when folding and storing is required, the lower leg assembly 30d folds relative to the upper leg assembly 30u, and the support leg assembly 30 folds relative to the extension plate 20 to be stored in the storage cavity q. After the lower leg assembly 30d is unfolded relative to the upper leg assembly 30u to 180°, the length of the entire support leg assembly 30 is slightly larger than the height of the box body 110, so as to support the extension plate 20 in a horizontal position in a manner of tilting from top to bottom and from inside to outside. After the lower leg assembly 30d folds relative to the upper leg assembly 30u, the length of the entire support leg assembly 30 is smaller than the height of the extension plate 20, so as to be stored in the storage cavity q.

[0067] As Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the support leg assembly 30 includes a first leg 31 and a second leg 32 that are parallel to each other. The first leg 31 includes an upper leg 31u and a lower leg 31d. The upper leg 31u is hinged to the inner side surface of the extension plate 20, and a joint structure 40 is provided between the upper leg 31u and the lower leg 31d. The joint structure 40 includes a shaft seat 41 at the lower end of the upper leg 31u and a rotating shaft 42 at the upper end of the lower leg 31d. The rotating shaft 42 is rotatably hinged in the shaft seat 41 so that the lower leg 31d can rotate and unfold or fold relative to the upper leg 31u.

[0068] A limiting structure 50 is provided between the upper leg assembly 30u and the lower leg assembly 30d to limit the lower leg assembly 30d to only rotate relative to one side of the upper leg assembly 30u between 0° and 180°. Specifically, the limiting structure 50 is provided between the upper leg 31u and the lower leg 31d to limit the lower leg 31d to only rotate relative to one side of the upper leg 31u between 0° and 180°. In this embodiment, the limiting structure 50 limits the lower leg 31d to only rotate relative to the inner side of the upper leg 31u between 0° and 180°.

[0069] The second leg 32 has the same structure as the first leg 31, that is, the same length and dimensions. The joint structure 40 and the limiting structure 50 are symmetrically arranged and will not be elaborated here.

[0070] An upper cross bar 33 is provided between the lower ends of the upper legs 31u of the first leg 31 and the lower ends of the upper legs 32u of the second leg 32. A lower cross bar 34 is provided between the lower ends of the lower legs 31d of the first leg 31 and the lower ends of the lower legs 32d of the second leg 32. The two upper legs 31u, 32u and the upper cross bar 33 form the upper leg assembly 30u, and the two lower legs 31d, 32d and the lower cross bar 34 form the lower leg assembly 30d. This setting method of the upper and lower leg assemblies can, on the one hand, make the unfolded support leg assembly 30 in a "day" shape to enhance the support stability, and on the other hand, when the user unfolds and folds the support leg assembly 30, they can hold the lower cross bar 34 in one step, and the operation is quick and convenient.

[0071] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the limiting structure 50 includes a groove 51 at the lower end of the upper leg 31u and a protrusion 52 at the upper end of the lower leg 31d, and a limiting surface 53 is provided on the inner side of the groove 51. When the lower leg 31d rotates to 180° relative to the upper leg 31u, the protrusion 52 enters the groove 51 and abuts against the limiting surface 53 to prevent the lower leg 31d from continuing to rotate in the same direction.

[0072] Since the limiting structure 50 in this embodiment limits the lower leg 31d to rotate only within the range of 0° to 180° relative to the inner side of the upper leg 31u, the groove 51 is provided on the outer side of the lower end of the upper leg 31u, and the protrusion 52 accordingly enters the groove 51 from the outer side of the lower end of the upper leg 31u to abut against the limiting surface 53. This design is also compatible with the way that the support leg assembly 30 supports the expansion plate 20 from top to bottom and from inside to outside, and the limiting structure 50 can bear a part of the supporting force and also plays a protective role in sharing the pressure on the joint structure 40.

[0073] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the limiting structure 50 also includes a limiting snap-in 54 at the lower end of the upper leg 31u and an arc-shaped protrusion 55 at the upper end of the lower leg 31d. When the lower leg 31d rotates to 180° relative to the upper leg 31u, the arc-shaped protrusion 55 is snapped into the limiting snap-in 54 to keep the upper leg 31u and the lower leg 31d at the 180° position.

[0074] In this embodiment, the limiting snap-in 54 is opened between the top wall of the groove 51 and the limiting surface 53, and the arc-shaped protrusion 55 is set at the top of the protrusion 52. When the lower leg 31d rotates to 180° relative to the upper leg 31u, the arc-shaped protrusion 55 passes over the top wall of the groove 51, and after a certain degree of extrusion deformation, it is inserted into the limiting snap-in 54 to keep the upper leg 31u and the lower leg 31d at the 180° position.

[0075] It should be noted that, first, in other embodiments, only one of the two groups of limiting structures 50 may be set, such as only a combination of the groove 51 and the protrusion 52, or only a combination of the limiting bayonet 54 and the arc-shaped protrusion 55. However, in this embodiment, the two groups of limiting structures 50 are arranged in a coordinated manner to simultaneously play the role of positioning, limiting and pressure sharing, and the effects are superimposed on each other. Second, the groove 51 and / or the limiting snap-on 54 are arranged at the lower end of the upper leg assembly 30u, and the protrusion 52 and / or the arc-shaped protrusion 55 are arranged at the upper end of the lower leg assembly 30d. In addition to the method of being arranged on the first leg 31 and the second leg 32 in this embodiment, in other embodiments, for example, a cross piece is arranged at the upper end of the lower leg assembly 30d, and when the lower leg assembly 30d is unfolded to 180° relative to the upper leg assembly 30u, the cross piece at the upper end of the lower leg assembly 30d is docked with the upper cross piece 33 of the upper leg assembly 30u, and the limiting structure 50 is correspondingly arranged on the two cross pieces, but the arrangement method of this embodiment has the simplest structure, and can simultaneously play a protective role in limiting the movement of the joint structure 40 and sharing the pressure.

[0076] like Figures 5 to 8 As shown, the inner side surface of the expansion plate 20 is concavely provided with a first receiving groove q1, and the outer side surface of the front panel 10 is correspondingly concavely provided with a second receiving groove q2. When the expansion plate 20 is closed relative to the front panel 10, the first receiving groove q1 and the second receiving groove q2 are connected to form a receiving cavity q. The support leg assembly 30 is hinged at the lower end of the first receiving groove q1, and a limiting plate 11 is provided at the lower end of the first receiving groove q1. The support leg assembly 30 is extended outward relative to the expansion plate 20, and the limiting plate 11 abuts against the upper end of the support leg assembly 30 to limit the support leg assembly 30 in a position inclined from top to bottom and from inside to outside.

[0077] Since the upper leg assembly 30u has an upper cross bar 33 and the lower leg assembly 30d has a lower cross bar 34, the lower leg assembly 30d rotates and folds relative to the upper leg assembly 30u to form a mouth-shaped frame k, the first receiving groove q1 is a mouth-shaped groove, wherein there is a rectangular protrusion 12 matching the shape of the mouth-shaped frame k, and the second receiving groove q2 is a rectangular groove. When folding and storing, the support leg assembly 30 is folded relative to the expansion board 20, and the rectangular protrusion 12 is embedded in the mouth-shaped frame k, and the mouth-shaped frame k is kept in the first receiving groove q1, and then the expansion board 20 is closed relative to the front panel 10, and the first receiving groove q1 and the second receiving groove q2 are connected to form a storage cavity q, so that the support leg assembly 30 is stored in the storage cavity q, and then during the folding and storing operation, the support leg assembly 30 is not easy to fall from the inner side of the expansion board 20, causing inconvenience or injury to the user.

[0078] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0079] The foldable shopping cart with a simple expandable desktop provided by the utility model is introduced above. The principle and implementation method of the utility model are described in this article using specific examples. The description of the above embodiments is only used to help understand the utility model and its core idea. It should be pointed out that for ordinary technicians in this technical field, the utility model can also be improved and modified without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A foldable shopping cart with a simple expandable tabletop, characterized in that: It comprises a box body and a box cover, wherein the box body comprises a bottom plate, a front panel, a rear panel, a left folding plate, and a right folding plate to enclose a storage space of the box body; The box cover can be placed on the top of the box body to close the accommodating space and form a first storage plane; The front panel is provided with an expansion board, the upper end of the expansion board is hinged to the upper end of the front panel, and the inner side surface of the expansion board is hinged with a foldable and unfoldable support leg assembly; The expansion board is unfolded to a horizontal position relative to the front panel to form an extended storage plane; the support leg assembly is unfolded outward relative to the expansion board and tilted from top to bottom and from inside to outside to keep the expansion board in a horizontal position; the first storage plane can form a second storage plane with the extended storage plane; The expansion plate is folded relative to the front panel, a storage cavity is formed between the expansion plate and the front panel, and the support leg assembly is folded relative to the expansion plate and stored in the storage cavity.

2. The foldable shopping cart with a simple expandable tabletop according to claim 1, characterized in that: The support leg assembly comprises a first support leg and a second support leg parallel to each other; The first leg comprises an upper leg and a lower leg, the upper leg is hinged to the inner side of the expansion plate, and a joint structure is provided between the upper leg and the lower leg; the joint structure comprises an axle seat at the lower end of the upper leg and a rotating shaft at the upper end of the lower leg, the rotating shaft is rotatably hinged in the axle seat, so that the lower leg can be rotated relative to the upper leg to be unfolded or folded; A limiting structure is provided between the upper supporting leg and the lower supporting leg to limit the lower supporting leg to rotate only between 0° and 180° relative to one side of the upper supporting leg; The second supporting leg has the same structure as the first supporting leg.

3. The foldable shopping cart with a simple expandable tabletop according to claim 2, characterized in that: The limiting structure includes a groove at the lower end of the upper leg and a protrusion at the upper end of the lower leg; a limiting surface is provided on the inner side of the groove; when the lower leg rotates to 180° relative to the upper leg, the protrusion enters the groove and abuts against the limiting surface to prevent the lower leg from continuing to rotate in the same direction.

4. The foldable shopping cart with a simple expandable tabletop according to claim 2, characterized in that: The limiting structure includes a limiting snap-in at the lower end of the upper leg and an arc-shaped protrusion at the upper end of the lower leg; when the lower leg rotates to 180° relative to the upper leg, the arc-shaped protrusion is snapped into the limiting snap-in to keep the upper leg and the lower leg at a 180° position.

5. The foldable shopping cart with a simple expandable tabletop according to claim 2, characterized in that: The inner side surface of the expansion board is concavely provided with a first receiving groove, and the outer side surface of the front panel is correspondingly concavely provided with a second receiving groove, and the expansion board is closed relative to the front panel, and the first receiving groove and the second receiving groove are connected to form the receiving cavity; The supporting leg assembly is hinged at the lower end of the first receiving slot; a limiting plate is provided at the lower end of the first receiving slot, and the supporting leg assembly is expanded outward relative to the expansion plate, and the limiting plate abuts against the supporting leg assembly to limit the supporting leg assembly in a position inclined from top to bottom and from inside to outside.

6. The foldable shopping cart with a simple expandable tabletop according to claim 5, characterized in that: An upper crosspiece is provided between the lower end of the upper leg of the first leg and the lower end of the upper leg of the second leg, and a lower crosspiece is provided between the lower end of the lower leg of the first leg and the lower end of the lower leg of the second leg; The two upper legs and the upper crossbar form an upper leg assembly, the two lower legs and the lower crossbar form a lower leg assembly, and the lower leg assembly is rotated and folded relative to the upper leg assembly to form a mouth-shaped frame; The first receiving groove is a mouth-shaped groove, which has a rectangular protrusion matching the shape of the mouth-shaped frame, the support leg assembly is folded relative to the expansion plate, and the rectangular protrusion is embedded in the mouth-shaped frame; The second receiving groove is a rectangular groove.

7. A foldable shopping cart with a simple expandable tabletop, characterized in that: It comprises a box body and a box cover, wherein the box body comprises a bottom plate, a front panel, a rear panel, a left folding plate, and a right folding plate to enclose a storage space of the box body; The box cover can be placed on the top of the box body to close the accommodating space, the bottom of the box body is provided with moving wheels, and the rear panel is provided with a pull rod; The front panel is provided with an expansion board, the upper end of the expansion board is hinged to the upper end of the front panel, and the inner side surface of the expansion board is hinged with a foldable and unfoldable support leg assembly; The supporting leg assembly comprises an upper supporting leg assembly and a lower supporting leg assembly, the upper end of the upper supporting leg assembly is hinged to the inner side surface of the expansion plate, and the lower supporting leg assembly can be rotated relative to the upper supporting leg assembly to be unfolded or folded; The expansion board is unfolded to a horizontal position relative to the front panel to form an expanded storage plane; the support leg assembly is unfolded outward relative to the expansion board, the lower support leg assembly is unfolded to 180° relative to the upper support leg assembly, and the support leg assembly is tilted from top to bottom and from inside to outside to keep the expansion board in a horizontal position; The expansion plate is folded relative to the front panel, a storage cavity is formed between the expansion plate and the front panel, the lower leg assembly is folded relative to the upper leg assembly, and the supporting leg assembly is folded relative to the expansion plate and stored in the storage cavity.

8. The foldable shopping cart with a simple expandable tabletop according to claim 7, characterized in that: The support leg assembly comprises a first support leg and a second support leg parallel to each other; The first leg comprises an upper leg and a lower leg, the upper leg is hinged to the inner side of the expansion plate, and a joint structure is provided between the upper leg and the lower leg; the joint structure comprises an axle seat at the lower end of the upper leg and a rotating shaft at the upper end of the lower leg, the rotating shaft is rotatably hinged in the axle seat, so that the lower leg can be rotated relative to the upper leg to be unfolded or folded; The second leg has the same structure as the first leg; An upper crosspiece is provided between the lower end of the upper leg of the first leg and the lower end of the upper leg of the second leg, and a lower crosspiece is provided between the lower end of the lower leg of the first leg and the lower end of the lower leg of the second leg; The two upper legs and the upper crossbar form an upper leg assembly, and the two lower legs and the lower crossbar form a lower leg assembly.

9. The foldable shopping cart with a simple expandable tabletop according to claim 7, characterized in that: A limiting structure is provided between the upper leg assembly and the lower leg assembly to limit the lower leg assembly to rotate only between 0° and 180° relative to one side of the upper leg assembly; The limiting structure includes a groove at the lower end of the upper leg assembly and a protrusion at the upper end of the lower leg assembly; a limiting surface is provided on the inner side of the groove; when the lower leg assembly rotates to 180° relative to the upper leg, the protrusion enters the groove and abuts against the limiting surface to prevent the lower leg assembly from continuing to rotate in the same direction.

10. The foldable shopping cart with a simple expandable tabletop according to claim 9, characterized in that: A limiting snap-in is provided between the top wall of the groove and the limiting surface, and an arc-shaped protrusion is provided at the top of the protrusion; when the lower leg assembly is rotated to 180° relative to the upper leg assembly, the arc-shaped protrusion passes over the top wall of the groove and is inserted into the limiting snap-in, so that the upper leg assembly and the lower leg assembly remain at a 180° position.

11. The foldable shopping cart with a simple expandable tabletop according to claim 7, characterized in that: The inner side surface of the expansion board is concavely provided with a first receiving groove, and the outer side surface of the front panel is correspondingly concavely provided with a second receiving groove, and the expansion board is closed relative to the front panel, and the first receiving groove and the second receiving groove are connected to form the receiving cavity; The supporting leg assembly is hinged at the lower end of the first receiving slot; a limiting plate is provided at the lower end of the first receiving slot, and the supporting leg assembly is expanded outward relative to the expansion plate, and the limiting plate abuts against the supporting leg assembly to limit the supporting leg assembly in a position inclined from top to bottom and from inside to outside.

12. The foldable shopping cart with a simple expandable tabletop according to claim 11, characterized in that: The lower leg assembly is rotated and folded relative to the upper leg assembly to form a mouth-shaped frame; The first receiving groove is a mouth-shaped groove, which has a rectangular protrusion matching the shape of the mouth-shaped frame, the support leg assembly is folded relative to the expansion plate, and the rectangular protrusion is embedded in the mouth-shaped frame; The second receiving groove is a rectangular groove.

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