Novel cart device

Abstract

The utility model relates to a novel cart device which comprises a frame unit, at least one fixed unit, a handrail unit, a movable unit, a first moving unit and a second moving unit. The stacking box has the advantages that the stacking box is fixed through the fixing unit, and jumping, toppling and sliding of the stacking box can be effectively prevented in the transportation process; the stacking box is rapidly and conveniently fixed through the fixing unit, the stacking box can be rapidly installed and separated through nested connection, additional fixing ropes, binding ropes and other structures do not need to be arranged, and the integration degree is high; the rotating mode of the frame unit and the armrest unit is improved through the movable unit, the service life is prolonged, shaking is avoided, and stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of handcart technology, and in particular to a novel handcart device. Background Technology

[0002] Existing handcarts often cause stacked toolboxes to bounce, tip over, or slide when transporting them, easily leading to damage, long transport times, and low efficiency. If securing the stacked toolboxes is necessary, additional securing ropes and ties are required, adding steps and consuming manpower.

[0003] In addition, due to long-term use, existing handcarts are prone to gaps between the handle structure and the frame structure during transportation, which can cause shaking and bumps during transportation, and further cause stacked boxes to jump, tip over and slide.

[0004] Currently, no effective solutions have been proposed for the problems existing in related technologies, such as the inability to secure stacked boxes, the need for additional ropes for fixation, and the wear and tear on the handrail structure and frame structure caused by long-term use, resulting in gaps and swaying. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by providing a novel trolley device that solves problems such as the inability to secure stacked boxes, the need for additional ropes for fixation, and the swaying caused by wear and tear between the handlebar structure and the frame structure due to long-term use.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A novel trolley device includes:

[0008] Chassis unit;

[0009] At least one fixing unit is provided on the frame unit for detachable connection with both sides of the stacking box;

[0010] The armrest unit is movably connected to the frame unit and is used to cooperate with the frame unit to enable the new trolley device to switch between two-wheel mode and four-wheel mode;

[0011] An active unit is disposed between the first end of the frame unit and the first end of the armrest unit, for enabling relative movement between the armrest unit and the frame unit;

[0012] A first moving unit is disposed at the second end of the frame unit and is used for moving;

[0013] The second moving unit is disposed at the first end of the handrail unit and is used for moving.

[0014] In some embodiments, the frame unit includes:

[0015] Two longitudinal frame elements are symmetrically arranged. The fixed unit is provided on the side of each of the two longitudinal frame elements. The movable unit is provided at the first end of each of the two longitudinal frame elements. The first moving unit is provided at the second end of each of the two longitudinal frame elements.

[0016] A transverse frame element is disposed between two longitudinal frame elements, and both ends of the transverse frame element are respectively connected to the two longitudinal frame elements.

[0017] In some embodiments, the frame unit further includes:

[0018] At least one reinforcing element is disposed between the two longitudinal frame elements, and the two ends of the reinforcing element are respectively connected to the two longitudinal frame elements.

[0019] In some embodiments, the fixing unit includes:

[0020] Two fixing elements are symmetrically arranged on both sides of the frame unit;

[0021] A plurality of recessed elements are respectively disposed on the corresponding fixing elements and respectively connected to both sides of the stacking box;

[0022] A plurality of protruding elements are respectively disposed on the corresponding fixed elements and located on the side of the corresponding recessed elements, and respectively connected to the two sides of the stacking box.

[0023] In some embodiments, the armrest unit includes:

[0024] Two longitudinal handrail elements are symmetrically arranged and are respectively movably connected to the movable unit;

[0025] A transverse handrail element is disposed between two longitudinal handrail elements, and both ends of the transverse handrail element are respectively connected to the second ends of the two longitudinal handrail elements;

[0026] Two first support elements are respectively disposed at the first end of the corresponding longitudinal handrail element and respectively connected to the second moving unit;

[0027] A first connecting element is disposed between the two first support elements, and both ends of the first connecting element are respectively connected to the two first support elements, for connecting with the movable unit when the novel trolley device is in four-wheel mode.

[0028] In some embodiments, the armrest unit further includes:

[0029] A plurality of first limiting elements are respectively disposed on the corresponding longitudinal handrail elements for connecting with the movable unit when the novel trolley device is in two-wheel mode.

[0030] In some embodiments, the armrest unit further includes:

[0031] A plurality of second limiting elements are respectively disposed on the corresponding first support elements, for connecting with the movable unit when the novel trolley device is in four-wheel mode.

[0032] In some embodiments, the active unit includes:

[0033] Two second support elements are symmetrically arranged at the first end of the frame unit;

[0034] Two first rotating elements are respectively disposed on corresponding second support elements;

[0035] Two extension elements are respectively disposed at the bottom of the corresponding second support element;

[0036] Two first positioning elements are respectively disposed on corresponding second support elements;

[0037] Two second positioning elements are respectively disposed on the corresponding extension elements;

[0038] Two first sleeve elements are respectively movably disposed on the side of the corresponding second bracket element and respectively connected to the corresponding first positioning element and the corresponding second positioning element, for stopping in two-wheel mode or four-wheel mode under the action of the first positioning element and the second positioning element;

[0039] Two second rotating elements are respectively disposed on the side of the corresponding first sleeve element and are detachably and movably connected to the corresponding first rotating element, for relative rotation with the first rotating element under the action of the first sleeve element;

[0040] Two second sleeve elements are respectively disposed on the corresponding first sleeve elements and are movably connected to the handrail unit, and are used to drive the first sleeve elements to switch between two-wheel mode and four-wheel mode under the action of the handrail unit.

[0041] In some embodiments, the active unit further includes:

[0042] A plurality of third limiting elements are respectively disposed at the bottom end of the corresponding extension elements, for limiting connection with the armrest unit when the new trolley device is in four-wheel mode.

[0043] In some embodiments, the active unit further includes:

[0044] A plurality of fourth limiting elements are respectively disposed at the bottom end of the corresponding extension elements, for limiting connection with the armrest unit when the new trolley device is in four-wheel mode.

[0045] In some embodiments, the active unit further includes:

[0046] A plurality of second connecting elements are respectively disposed at the top end of the corresponding first sleeve element;

[0047] A plurality of third connecting elements are respectively disposed at the top end of the corresponding second sleeve element and respectively connected to the corresponding second connecting element.

[0048] In some embodiments, the active unit further includes:

[0049] A plurality of fourth connecting elements are respectively disposed at the bottom end of the corresponding first sleeve element;

[0050] A plurality of fifth connecting elements are respectively disposed at the bottom end of the corresponding second sleeve element and are respectively connected to the corresponding fourth connecting element.

[0051] In some embodiments, the active unit further includes:

[0052] A plurality of fifth limiting elements are respectively disposed at the top end of the corresponding first sleeve element, for limiting connection with the handrail unit when the new trolley device is in two-wheel mode.

[0053] In some embodiments, the active unit further includes:

[0054] A plurality of sixth limiting elements are respectively disposed at the top end of the corresponding second sleeve element, for limiting connection with the handrail unit when the new trolley device is in two-wheel mode.

[0055] In some embodiments, the first moving unit includes:

[0056] Two third support elements are symmetrically arranged at the second end of the frame unit and connected to the frame unit respectively;

[0057] Two first moving elements are respectively movably disposed on the corresponding third support element for movement.

[0058] In some embodiments, the first moving unit further includes:

[0059] A transmission element, which is connected to the two first moving elements respectively, for transmission.

[0060] In some embodiments, the second moving unit includes:

[0061] Two fourth support elements are symmetrically arranged at the bottom end of the handrail unit and are respectively connected to the handrail unit;

[0062] Two second moving elements are respectively movably disposed on the corresponding fourth support element for movement.

[0063] In some embodiments, the second moving unit further includes:

[0064] Two braking elements are respectively movably disposed on the corresponding fourth bracket element, for locking or unlocking the corresponding second moving element.

[0065] In some of these embodiments, it also includes:

[0066] A locking unit is disposed on the frame unit and removably locked to the armrest unit, for locking the armrest unit when the new trolley device is in two-wheel mode and unlocking the armrest unit to allow the armrest unit to move relative to the frame unit.

[0067] In some embodiments, the locking unit includes:

[0068] Two fifth support elements are symmetrically arranged on the frame unit;

[0069] Two seventh limiting elements are respectively disposed on the corresponding fifth bracket elements, and are used to connect with the handrail unit when the new trolley device is in two-wheel mode;

[0070] A first control element is movably disposed between the two fifth support elements;

[0071] Two second control elements are respectively movably disposed on the corresponding fifth support element and respectively connected to both ends of the first control element, for rotating under the action of the first control element;

[0072] Two locking elements are respectively movably disposed on the corresponding fifth support element and respectively contact the corresponding second control element, and respectively are removably locked to the handrail unit, for locking the handrail unit and releasing the handrail unit under the action of the second control element.

[0073] In some of these embodiments, it also includes:

[0074] A baffle unit, disposed at the second end of the frame unit, is used to place items when the novel trolley device is in two-wheel mode.

[0075] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0076] This utility model discloses a novel trolley device that uses a fixing unit to secure stacked boxes, effectively preventing them from jumping, tipping, or slipping during transportation. The fixing unit provides quick and convenient securing of the stacked boxes, and the nested connection allows for rapid installation and separation of the boxes without the need for additional fixing ropes or ties, resulting in a high degree of integration. Furthermore, the movable unit improves the rotation method of the frame and handle units, extending their service life, preventing wobbling, and enhancing stability. Attached Figure Description

[0077] Figure 1 This is a schematic diagram of a novel trolley device in four-wheel mode according to an embodiment of the present utility model;

[0078] Figure 2 This is a schematic diagram of a novel trolley device in two-wheel mode according to an embodiment of the present utility model;

[0079] Figure 3 This is a schematic diagram of a vehicle frame unit according to an embodiment of the present utility model;

[0080] Figure 4 This is a schematic diagram of the fixing unit according to an embodiment of the present utility model;

[0081] Figure 5 This is a schematic diagram of the armrest unit according to an embodiment of the present utility model;

[0082] Figure 6 This is a schematic diagram of an active unit in two-wheel mode according to an embodiment of the present utility model;

[0083] Figure 7 This is a schematic diagram of the movable unit in four-wheel mode according to an embodiment of the present utility model;

[0084] Figure 8 This is an exploded view of the active unit according to an embodiment of the present invention (where two second support elements are shown to represent two different sides of the second support elements);

[0085] Figure 9 This is a schematic diagram of the first moving unit according to an embodiment of the present utility model;

[0086] Figure 10 This is a schematic diagram of the second moving unit according to an embodiment of the present utility model;

[0087] Figure 11 This is a schematic diagram of the braking element of the second moving unit according to an embodiment of the present utility model;

[0088] Figure 12 This is a schematic diagram of a locking unit according to an embodiment of the present utility model;

[0089] Figure 13 This is a partial schematic diagram of the locking unit according to an embodiment of the present utility model.

[0090] The reference numerals in the attached drawings are as follows: 100, frame unit; 101, longitudinal frame element; 102, transverse frame element; 103, reinforcing element;

[0091] 200. Fixing unit; 201. Fixing element; 202. Recessed element; 203. Protruding element;

[0092] 300, Handrail unit; 301, Longitudinal handrail element; 302, Transverse handrail element; 303, First support element; 304, First connecting element; 305, First limiting element; 306, Second limiting element;

[0093] 400. Movable unit; 401. Second support element; 402. First rotating element; 403. Extension element; 404. First positioning element; 405. Second positioning element; 406. First sleeve element; 407. Second rotating element; 408. Second sleeve element; 409. Third limiting element; 410. Fourth limiting element; 411. Second connecting element; 412. Third connecting element; 413. Fourth connecting element; 414. Fifth connecting element; 415. Fifth limiting element; 416. Sixth limiting element;

[0094] 500, First moving unit; 501, Third support element; 502, First moving element; 503, Transmission element;

[0095] 600. Second moving unit; 601. Fourth support element; 602. Second moving element; 603. Braking element;

[0096] 700. Locking unit; 701. Fifth support element; 702. Seventh limiting element; 703. First control element; 704. Second control element; 705. Locking element;

[0097] 800, baffle unit. Detailed Implementation

[0098] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0099] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0100] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0101] An illustrative embodiment of this utility model, such as Figures 1-2As shown, a novel trolley device includes a frame unit 100, at least one fixed unit 200, a handle unit 300, a movable unit 400, a first moving unit 500, and a second moving unit 600. The fixed unit 200 is disposed on the frame unit 100 and is detachably connected to both sides of a stacking box. The handle unit 300 is movably connected to the frame unit 100 and cooperates with the frame unit 100 to switch the novel trolley device between a two-wheeled mode and a four-wheeled mode. The movable unit 400 is disposed between the first end of the frame unit 100 and the first end of the handle unit 300, allowing relative movement between the handle unit 300 and the frame unit 100. The first moving unit 500 is disposed at the second end of the frame unit 100 for movement. The second moving unit 600 is disposed at the first end of the handle unit 300 for movement.

[0102] In some embodiments, there are multiple fixing units 200. The multiple fixing units 200 are arranged sequentially along the length direction of the frame unit 100.

[0103] In some embodiments, two adjacent fixed units 200 may abut or be spaced apart.

[0104] The novel trolley device of this utility model has a two-wheel mode and a four-wheel mode:

[0105] (I) Two-wheel mode

[0106] When the new trolley device is in two-wheel mode, the handle unit 300 is set parallel to the frame unit 100. At this time, the second moving unit 600 is set close to the first moving unit 500.

[0107] When in use, the new trolley device is set perpendicular to the horizontal plane, that is, the frame unit 100 is perpendicular to the horizontal plane and the handle unit 300 is located on the rear side of the frame unit 100.

[0108] During movement, the movement is carried out via the first moving unit 500;

[0109] (II) Four-wheel mode

[0110] When the new trolley device is in four-wheel mode, the handle unit 300 is set perpendicular to the frame unit 100. At this time, the second moving unit 600 is set away from the first moving unit 500.

[0111] When in use, the frame unit 100 is parallel to the horizontal plane and the handlebar unit 300 is perpendicular to the horizontal plane;

[0112] During movement, the movement is carried out through the first moving unit 500 and the second moving unit 600.

[0113] like Figure 3As shown, the frame unit 100 includes two longitudinal frame elements 101 and a transverse frame element 102. The two longitudinal frame elements 101 are symmetrically arranged, and each of the two longitudinal frame elements 101 has a fixed unit 200 on its side, a movable unit 400 at its first end, and a first moving unit 500 at its second end. The transverse frame element 102 is disposed between the two longitudinal frame elements 101, and both ends of the transverse frame element 102 are connected to the two longitudinal frame elements 101.

[0114] In some embodiments, the longitudinal frame element 101 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0115] In some of these embodiments, the longitudinal frame element 101 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0116] In some of these embodiments, the longitudinal frame element 101 includes, but is not limited to, a longitudinal frame.

[0117] In some embodiments, the transverse frame element 102 is provided with a number of hole structures and / or a number of groove structures and / or a number of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0118] The two ends of the transverse frame element 102 are respectively connected to the first ends of the two longitudinal frame elements 101, including but not limited to fixed connections and detachable connections, such as welding, integral molding, plug-in, snap-fit, bolt (group) connections, etc. For example, the transverse frame element 102 is first plugged into the longitudinal frame element 101, and then bolts (groups) are used to connect them, which can improve the connection strength.

[0119] In some of these embodiments, the transverse frame element 102 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0120] In some of these embodiments, the transverse frame element 102 includes, but is not limited to, the transverse frame.

[0121] Furthermore, the frame unit 100 also includes at least one reinforcing element 103, which is disposed between the two longitudinal frame elements 101, and the two ends of the reinforcing element 103 are respectively connected to the two longitudinal frame elements 101.

[0122] In some embodiments, the reinforcing element 103 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for insertion, snap-fitting or connection with other structural units (or elements) by bolts (groups).

[0123] The two ends of the reinforcing element 103 are respectively connected to positions between the first and second ends of the two longitudinal frame elements 101 (e.g., at 1 / 2, 1 / 3, or 2 / 3 positions of the longitudinal frame element 101), including but not limited to fixed connections and detachable connections, such as welding, integral molding, plug-in, snap-fit, and bolt (group) connections. For example, the reinforcing element 103 can be plugged into the longitudinal frame element 101 first, and then connected using bolts (groups) to improve the connection strength.

[0124] In some embodiments, there are multiple reinforcing elements 103. The multiple reinforcing elements 103 are spaced apart along the length direction of the longitudinal frame element 101.

[0125] In some of these embodiments, the reinforcing element 103 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0126] In some of these embodiments, the reinforcing element 103 includes, but is not limited to, reinforcing rods, reinforcing frames, reinforcing beams, etc.

[0127] like Figure 4 As shown, the fixing unit 200 includes two fixing elements 201, a plurality of recessed elements 202, and a plurality of protruding elements 203. The two fixing elements 201 are symmetrically arranged on both sides of the frame unit 100; the plurality of recessed elements 202 are respectively disposed on the corresponding fixing elements 201 and are respectively connected to both sides of the stacking box; the plurality of protruding elements 203 are respectively disposed on the corresponding fixing elements 201, located on the side of the corresponding recessed elements 202, and are respectively connected to both sides of the stacking box.

[0128] Specifically, the two fixing elements 201 are respectively disposed on the corresponding longitudinal frame elements 101.

[0129] The fixing element 201 is detachably connected to the longitudinal frame element 101, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the fixing element 201 can be plugged into the longitudinal frame element 101 first, and then connected with bolts (groups) to improve the connection strength.

[0130] In some embodiments, the fixing element 201 includes a longitudinal fixing member and a transverse fixing member. The longitudinal fixing member is located on the side of the longitudinal frame element 101 (generally the side of the longitudinal frame element 101 facing another longitudinal frame element 101), and the longitudinal fixing member is provided with a protruding element 203; the transverse fixing member is disposed at the top of the longitudinal fixing member and is located at the top of the longitudinal frame element 101, and the transverse fixing member is provided with a recessed element 202.

[0131] In addition, the lateral fastener may also be provided with a protruding element 203.

[0132] At least one of the longitudinal fastener and the transverse fastener is connected to the longitudinal frame element 101.

[0133] In some of these embodiments, the fixing element 201 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0134] In some of these embodiments, the fixing element 201 includes, but is not limited to, a fixing base, a fixing bracket, etc.

[0135] The recessed element 202 may be installed through the fixing element 201 (lateral fixing member) or may not be installed through the fixing element 201 (lateral fixing member).

[0136] The number of recessed elements 202 matches the number of fixing elements 201. Generally, the number of recessed elements 202 is an integer multiple of the number of fixing elements 201. That is, each fixing element 201 is provided with at least one recessed element 202.

[0137] When each fixing element 201 is provided with a plurality of recessed elements 202, the plurality of recessed elements 202 are spaced apart along the length direction of the fixing element 201.

[0138] There is a gap between two adjacent recessed elements 202.

[0139] In some of these embodiments, the recessed element 202 includes, but is not limited to, mounting grooves, insertion grooves, snap-fit ​​grooves, etc.

[0140] The protruding element 203 and the fixed element 201 are integrally formed.

[0141] The number of protruding elements 203 matches the number of fixing elements 201. Generally, the number of protruding elements 203 is an integer multiple of the number of fixing elements 201. That is, each fixing element 201 is provided with at least one protruding element 203.

[0142] When each fixing element 201 is provided with a plurality of protruding elements 203, the plurality of protruding elements 203 are spaced apart along the length direction of the fixing element 201.

[0143] The number of protruding elements 203 matches the number of recessed elements 202. Generally, the number of protruding elements 203 is equal to the number of recessed elements 202.

[0144] There is a gap between two adjacent protruding elements 203.

[0145] In some of these embodiments, the protruding element 203 includes, but is not limited to, mounting protrusions, plug-in protrusions, snap-fit ​​protrusions, etc.

[0146] like Figure 5 As shown, the armrest unit 300 includes two longitudinal armrest elements 301, a transverse armrest element 302, two first support elements 303, and a first connecting element 304. The two longitudinal armrest elements 301 are symmetrically arranged and are movably connected to the movable unit 400. The transverse armrest element 302 is disposed between the two longitudinal armrest elements 301, with both ends connected to the second ends of the two longitudinal armrest elements 301. The two first support elements 303 are respectively disposed at the first ends of the corresponding longitudinal armrest elements 301 and are connected to the second movable unit 600. The first connecting element 304 is disposed between the two first support elements 303, with both ends connected to the two first support elements 303, and is used to connect to the movable unit 400 when the new trolley device is in four-wheel mode.

[0147] Specifically, when the new trolley device is in two-wheel mode, the two longitudinal handlebar elements 301 are located on the side of the corresponding longitudinal frame element 101; when the new trolley device is in four-wheel mode, the two longitudinal handlebar elements 301 are perpendicular to the corresponding longitudinal frame element 101.

[0148] In some embodiments, the longitudinal handrail element 301 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0149] In some of these embodiments, the longitudinal handrail element 301 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0150] In some of these embodiments, the longitudinal handrail element 301 includes, but is not limited to, a longitudinal handrail.

[0151] In some embodiments, the lateral handrail element 302 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0152] In some embodiments, the transverse handrail element 302 is U-shaped. Specifically, the transverse handrail element 302 includes a transverse handrail member and two longitudinal handrail members. The two longitudinal handrail members are respectively disposed at both ends of the transverse handrail member, and the bottom ends of the two longitudinal handrail members are respectively connected to the second end of the longitudinal handrail element 301.

[0153] The horizontal handrail element 302 is detachably connected to the vertical handrail element 301, including but not limited to plug-in, snap-fit, and bolt (group) connection. For example, the horizontal handrail element 302 can be plugged into the vertical handrail element 301 first, and then bolts (groups) can be used to connect them, which can improve the connection strength.

[0154] In some of the embodiments, at the connection position between the horizontal handrail element 302 and the vertical handrail element 301, there is an angle between the horizontal handrail element 302 and the vertical handrail element 301, where 90°≤the angle≤180°.

[0155] In some of these embodiments, the transverse handrail element 302 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0156] In some of these embodiments, the lateral handrail element 302 includes, but is not limited to, a lateral handrail.

[0157] In some embodiments, the first support element 303 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0158] In some embodiments, the first support element 303 is U-shaped. Specifically, the open end of the first support element 303 is connected to the first end of the longitudinal handrail element 301.

[0159] The first support element 303 is detachably connected to the longitudinal handrail element 301, including but not limited to plug-in, snap-fit, and bolt (group) connection. For example, the first support element 303 can be plugged into the longitudinal handrail element 301 first, and then bolts (groups) can be used to connect it, which can improve the connection strength.

[0160] In some of these embodiments, the first support element 303 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0161] In some of these embodiments, the first support element 303 includes, but is not limited to, a mounting bracket.

[0162] The first connecting element 304 is detachably connected to the first support element 303, including but not limited to plug-in, snap-in, and bolt (group) connection. For example, the first connecting element 304 can be plugged into the first support element 303 first, and then connected with bolts (groups) to improve the connection strength.

[0163] In some of these embodiments, the first connecting element 304 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0164] In some of these embodiments, the first connecting element 304 includes, but is not limited to, a connecting rod, a connecting shaft, etc.

[0165] Furthermore, the armrest unit 300 also includes a plurality of first limiting elements 305. The plurality of first limiting elements 305 are respectively disposed on the corresponding longitudinal armrest elements 301, for connecting with the movable unit 400 when the new trolley device is in two-wheel mode.

[0166] The first limiting element 305 is detachably connected to the longitudinal handrail element 301, including but not limited to plug-in, snap-in, bolt connection, etc.

[0167] The number of first limiting elements 305 matches the number of longitudinal handrail elements 301. Generally, the number of first limiting elements 305 is an integer multiple of the number of longitudinal handrail elements 301. That is, each longitudinal handrail element 301 is provided with at least one first limiting element 305.

[0168] When a plurality of first limiting elements 305 are provided in each longitudinal handrail element 301, the plurality of first limiting elements 305 are spaced apart along the width direction of the longitudinal handrail element 301.

[0169] In some of these embodiments, the first limiting element 305 includes, but is not limited to, a limiting protrusion and a limiting bolt.

[0170] In this invention, when the new trolley device is in two-wheel mode, the first limiting element 305 can be used to reduce the swaying of the longitudinal handrail element 301 and improve the stability of the longitudinal handrail element 301.

[0171] Furthermore, the armrest unit 300 also includes a plurality of second limiting elements 306. The plurality of second limiting elements 306 are respectively disposed on the corresponding first support elements 303, for connecting with the movable unit 400 when the new trolley device is in four-wheel mode.

[0172] The second limiting element 306 is detachably connected to the first bracket element 303, including but not limited to plug-in, snap-in, bolt connection, etc.

[0173] The number of second limiting elements 306 matches the number of first support elements 303. Generally, the number of second limiting elements 306 is an integer multiple of the number of longitudinal handrail elements 301. That is, each first support element 303 is provided with at least one second limiting element 306.

[0174] When a plurality of second limiting elements 306 are provided in each first support element 303, the plurality of second limiting elements 306 are spaced apart along the width direction of the first support element 303.

[0175] In some embodiments, the second limiting element 306 includes, but is not limited to, a limiting protrusion and a limiting bolt.

[0176] like Figures 6-8 As shown, the movable unit 400 includes two second support elements 401, two first rotating elements 402, two extension elements 403, two first positioning elements 404, two second positioning elements 405, two first sleeve elements 406, two second rotating elements 407, and two second sleeve elements 408. The two second support elements 401 are symmetrically arranged at the first end of the frame unit 100; the two first rotating elements 402 are respectively arranged on the corresponding second support elements 401; the two extension elements 403 are respectively arranged at the bottom of the corresponding second support elements 401; the two first positioning elements 404 are respectively arranged on the corresponding second support elements 401; the two second positioning elements 405 are respectively arranged on the corresponding extension elements 403; and the two first sleeve elements 406 are movably arranged on the sides of the corresponding second support elements 401 and respectively connected to the corresponding first positioning elements 404 and the corresponding second positioning elements 405, for use in the first... The first positioning element 404 and the second positioning element 405 are used to maintain the two-wheel mode or the four-wheel mode. The two second rotating elements 407 are respectively disposed on the side of the corresponding first sleeve element 406 and are detachably connected to the corresponding first rotating element 402. They are used to rotate relative to the first rotating element 402 under the action of the first sleeve element 406. The two second sleeve elements 408 are respectively disposed on the corresponding first sleeve element 406 and are movably connected to the handrail unit 300. They are used to drive the first sleeve element 406 to switch between the two-wheel mode and the four-wheel mode under the action of the handrail unit 300.

[0177] Specifically, the two second support elements 401 are respectively disposed at the first end of the corresponding longitudinal frame element 101; the two second sleeve elements 408 are respectively slidably connected to the corresponding longitudinal handrail element 301, and are used to drive the first sleeve element 406 to switch between two-wheel mode and four-wheel mode under the action of the longitudinal handrail element 301.

[0178] In some embodiments, the second support element 401 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0179] The second bracket element 401 is detachably connected to the longitudinal frame element 101, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the second bracket element 401 can be plugged into the longitudinal frame element 101 first, and then connected using bolts (groups), which can improve the connection strength.

[0180] In some of these embodiments, the second support element 401 is U-shaped or L-shaped.

[0181] In some of these embodiments, the second support element 401 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0182] In some of these embodiments, the second support element 401 includes, but is not limited to, a mounting bracket.

[0183] In some of the embodiments, the two first rotating elements 402 are respectively connected to the corresponding longitudinal frame elements 101.

[0184] The first rotating element 402 is fixedly connected to the second support element 401, including but not limited to being integrally formed.

[0185] The first rotating element 402 has a hollow structure.

[0186] In some of these embodiments, the first rotating element 402 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0187] In some of these embodiments, the first rotating element 402 includes, but is not limited to, a rotating sleeve.

[0188] The extension element 403 is fixedly connected to the second support element 401, including but not limited to being integrally formed.

[0189] In some of these embodiments, the extension element 403 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0190] In some of these embodiments, the extension element 403 includes, but is not limited to, an extension bracket, an extension plate, etc.

[0191] The first positioning element 404 and the second bracket element 401 are fixedly connected or detachably connected, including but not limited to welding, integral molding, plugging, snap-fitting, etc.

[0192] In some of these embodiments, the first positioning element 404 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0193] In some embodiments, the first positioning element 404 includes at least a first lateral positioning surface and a first longitudinal positioning surface. Specifically, when the first sleeve element 406 is in a two-wheeled mode, the first sleeve element 406 abuts against the first lateral positioning surface; when the first sleeve element 406 is in a four-wheeled mode, the first sleeve element 406 abuts against the first longitudinal positioning surface.

[0194] In some of these embodiments, the first positioning element 404 includes, but is not limited to, a positioning bracket, a positioning baffle, etc.

[0195] The second positioning element 405 is fixedly connected to the extension element 403 or detachably connected, including but not limited to welding, integral molding, plugging, snap-fitting, etc.

[0196] In some of these embodiments, the second positioning element 405 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0197] In some embodiments, the second positioning element 405 includes at least a second lateral positioning surface and a second longitudinal positioning surface. Specifically, when the first sleeve element 406 is in a two-wheeled mode, the first sleeve element 406 abuts against the second lateral positioning surface; when the first sleeve element 406 is in a four-wheeled mode, the first sleeve element 406 abuts against the second longitudinal positioning surface.

[0198] In some of these embodiments, the second positioning element 405 includes, but is not limited to, a positioning bracket, a positioning baffle, etc.

[0199] In some of these embodiments, the first sleeve element 406 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0200] In some of these embodiments, the first sleeve element 406 is trapezoidal. For example, the height of the first sleeve element 406 increases from one side to the other.

[0201] In some of these embodiments, the first sleeve element 406 includes, but is not limited to, a sleeve.

[0202] The second rotating element 407 is fixedly connected to or detachably connected to the first sleeve element 406, including but not limited to welding, plugging, snap-fitting, bolt (group) connection, etc.

[0203] In some of these embodiments, the second rotating element 407 is made of a high-strength, corrosion-resistant material, such as a metallic material or a non-metallic material, including but not limited to an alloy (stainless steel, aluminum alloy) with an anti-corrosion coating on its outer surface.

[0204] In some embodiments, the end of the second rotating element 407 protrudes beyond the first rotating element 402. Furthermore, the protruding portion of the second rotating element 407 can be locked by a locking structure (e.g., bolts (sets)).

[0205] In some of these embodiments, the second rotating element 407 includes, but is not limited to, a rotating shaft.

[0206] In this invention, the second rotating element 407 does not directly contact the longitudinal frame element 101, reducing wear on the opening position of the longitudinal frame element 101 due to the rotation of the second rotating element 407, preventing loosening, and improving long-term service life.

[0207] The second sleeve element 408 is detachably connected to the first sleeve element 406, including but not limited to plug-in, snap-fit, bolt connection, etc.

[0208] In some of these embodiments, the second sleeve element 408 is made of high-strength, corrosion-resistant materials, such as metallic materials, non-metallic materials, including but not limited to alloys (stainless steel, aluminum alloy) with an anti-corrosion coating on the outer surface.

[0209] In some of these embodiments, the second sleeve element 408 includes, but is not limited to, a sleeve.

[0210] In a preferred embodiment of this invention, the first sleeve element 406 is made of a metal material, and the second sleeve element 408 is made of a non-metallic material (such as plastic). The purpose of this design is to avoid direct contact between the longitudinal handrail element 301 and the first sleeve element 406, reducing wear on the first sleeve element 406 and improving its long-term service life. Furthermore, the replaceable second sleeve element 408 allows for selection of a suitable specification (e.g., wall thickness) for the longitudinal handrail element 301, preventing wobbling of the longitudinal handrail element 301.

[0211] Furthermore, the active unit 400 also includes a plurality of third limiting elements 409. The plurality of third limiting elements 409 are respectively disposed at the bottom end of the corresponding extension element 403, and are used to limit the connection with the armrest unit 300 when the new trolley device is in four-wheel mode.

[0212] Specifically, several third limiting elements 409 are respectively limited and connected to the first connecting element 304.

[0213] The third limiting element 409 is disposed through the extension element 403.

[0214] Generally, there are two third limiting elements 409. Each extension element 403 is provided with one third limiting element 409.

[0215] In some of these embodiments, the third limiting element 409 includes, but is not limited to, a limiting hole or a limiting groove.

[0216] Furthermore, the active unit 400 also includes a plurality of fourth limiting elements 410. The plurality of fourth limiting elements 410 are respectively disposed at the bottom end of the corresponding extension element 403, and are used to limit the connection with the armrest unit 300 when the new trolley device is in four-wheel mode.

[0217] Specifically, several fourth limiting elements 410 are respectively limited and connected to the corresponding second limiting elements 306.

[0218] The fourth limiting element 410 is set through the extension element 403.

[0219] The number of fourth limiting elements 410 matches the number of extension elements 403. Generally, the number of fourth limiting elements 410 is an integer multiple of the number of extension elements 403. That is, each extension element 403 is provided with at least one fourth limiting element 410.

[0220] When each extension element 403 is provided with a plurality of fourth limiting elements 410, the plurality of fourth limiting elements 410 are spaced apart along the width direction of the extension element 403.

[0221] In some of these embodiments, the fourth limiting element 410 includes, but is not limited to, a limiting hole and a limiting groove.

[0222] Furthermore, the active unit 400 also includes a plurality of second connecting elements 411 and a plurality of third connecting elements 412. The plurality of second connecting elements 411 are respectively disposed at the top end of the corresponding first sleeve element 406; the plurality of third connecting elements 412 are respectively disposed at the top end of the corresponding second sleeve element 408 and are respectively connected to the corresponding second connecting elements 411.

[0223] In some of these embodiments, the second connecting element 411 is disposed through the first sleeve element 406.

[0224] The number of second connecting elements 411 matches the number of first sleeve elements 406. Generally, the number of second connecting elements 411 is an integer multiple of the number of first sleeve elements 406. That is, each first sleeve element 406 is provided with at least one second connecting element 411.

[0225] When a plurality of second connecting elements 411 are provided in each first sleeve element 406, the plurality of second connecting elements 411 are spaced apart along the length direction and / or width direction of the first sleeve element 406.

[0226] In some of these embodiments, the second connecting element 411 includes, but is not limited to, a connecting groove, a slot, a socket, etc.

[0227] The third connecting element 412 is fixedly connected to the second sleeve element 408, including but not limited to integral molding.

[0228] The number of third connecting elements 412 matches the number of second sleeve elements 408. Generally, the number of third connecting elements 412 is an integer multiple of the number of second sleeve elements 408. That is, each second sleeve element 408 is provided with at least one third connecting element 412.

[0229] When a plurality of third connecting elements 412 are provided in each second sleeve element 408, the plurality of third connecting elements 412 are spaced apart along the length direction and / or width direction of the second sleeve element 408.

[0230] The number of third connecting elements 412 matches the number of second connecting elements 411. Generally, the number of third connecting elements 412 is equal to the number of second connecting elements 411.

[0231] In some embodiments, the third connecting element 412 includes, but is not limited to, a connecting block, a card block, a plug block, etc.

[0232] Furthermore, the active unit 400 also includes a plurality of fourth connecting elements 413 and a plurality of fifth connecting elements 414. The plurality of fourth connecting elements 413 are respectively disposed at the bottom end of the corresponding first sleeve element 406; the plurality of fifth connecting elements 414 are respectively disposed at the bottom end of the corresponding second sleeve element 408, and are respectively connected to the corresponding fourth connecting elements 413.

[0233] In some of these embodiments, the fourth connecting element 413 is disposed through the first sleeve element 406.

[0234] The number of fourth connecting elements 413 matches the number of first sleeve elements 406. Generally, the number of fourth connecting elements 413 is an integer multiple of the number of first sleeve elements 406. That is, each first sleeve element 406 is provided with at least one fourth connecting element 413.

[0235] When a plurality of fourth connecting elements 413 are provided in each first sleeve element 406, the plurality of fourth connecting elements 413 are spaced apart along the length direction and / or width direction of the first sleeve element 406.

[0236] In some of these embodiments, the fourth connecting element 413 includes, but is not limited to, a connecting groove, a slot, a socket, etc.

[0237] The fifth connecting element 414 is fixedly connected to the second sleeve element 408, including but not limited to integral molding.

[0238] The number of fifth connecting elements 414 matches the number of second sleeve elements 408. Generally, the number of fifth connecting elements 414 is an integer multiple of the number of second sleeve elements 408. That is, each second sleeve element 408 is provided with at least one fifth connecting element 414.

[0239] When a plurality of fifth connecting elements 414 are provided in each second sleeve element 408, the plurality of fifth connecting elements 414 are spaced apart along the length direction and / or width direction of the second sleeve element 408.

[0240] The number of fifth connecting elements 414 matches the number of fourth connecting elements 413. Generally, the number of fifth connecting elements 414 is equal to the number of second connecting elements 411.

[0241] In some embodiments, the fifth connecting element 414 includes, but is not limited to, a connecting block, a card block, a plug block, etc.

[0242] Furthermore, the active unit 400 also includes a plurality of fifth limiting elements 415. The plurality of fifth limiting elements 415 are respectively disposed at the top end of the corresponding first sleeve element 406, and are used to limit the connection with the armrest unit 300 when the new trolley device is in two-wheel mode.

[0243] In some of these embodiments, the fifth limiting element 415 is disposed through the first sleeve element 406.

[0244] The number of fifth limiting elements 415 matches the number of first sleeve elements 406. Generally, the number of fifth limiting elements 415 is an integer multiple of the number of first sleeve elements 406. That is, each first sleeve element 406 is provided with at least one fifth limiting element 415.

[0245] When a plurality of fifth limiting elements 415 are provided in each first sleeve element 406, the plurality of fifth limiting elements 415 are spaced apart along the length direction and / or width direction of the first sleeve element 406.

[0246] The number of fifth limiting elements 415 matches the number of first limiting elements 305. Generally, the number of fifth limiting elements 415 is equal to the number of first limiting elements 305.

[0247] In some of these embodiments, the fifth limiting element 415 includes, but is not limited to, a limiting groove.

[0248] Furthermore, the active unit 400 also includes a plurality of sixth limiting elements 416. The plurality of sixth limiting elements 416 are respectively disposed at the top end of the corresponding second sleeve element 408, and are used to limit the connection with the armrest unit 300 when the new trolley device is in two-wheel mode.

[0249] In some of these embodiments, the sixth limiting element 416 is disposed through the second sleeve element 408.

[0250] The number of sixth limiting elements 416 matches the number of second sleeve elements 408. Generally, the number of sixth limiting elements 416 is an integer multiple of the number of second sleeve elements 408. That is, each second sleeve element 408 is provided with at least one sixth limiting element 416.

[0251] When a plurality of sixth limiting elements 416 are provided in each second sleeve element 408, the plurality of sixth limiting elements 416 are spaced apart along the length direction and / or width direction of the second sleeve element 408.

[0252] The number of sixth limiting elements 416 matches the number of first limiting elements 305. Generally, the number of sixth limiting elements 416 is equal to the number of first limiting elements 305.

[0253] The number of sixth limiting elements 416 matches the number of fifth limiting elements 415. Generally, the number of sixth limiting elements 416 is equal to the number of fifth limiting elements 415.

[0254] In some of these embodiments, the sixth limiting element 416 includes, but is not limited to, a limiting groove.

[0255] like Figure 9 As shown, the first moving unit 500 includes two third support elements 501 and two first moving elements 502. The two third support elements 501 are symmetrically disposed at the second end of the frame unit 100 and are respectively connected to the frame unit 100; the two first moving elements 502 are respectively movably disposed on the corresponding third support elements 501 for movement.

[0256] Specifically, the two third bracket elements 501 are respectively disposed at the second end of the corresponding longitudinal frame element 101 and are respectively connected to the corresponding longitudinal frame element 101.

[0257] In some embodiments, the third support element 501 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0258] The third bracket element 501 is detachably connected to the longitudinal frame element 101, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the third bracket element 501 can be plugged into the longitudinal frame element 101 first, and then connected using bolts (groups) to improve the connection strength.

[0259] In some of these embodiments, the third support element 501 includes, but is not limited to, a mounting bracket.

[0260] The first movable element 502 is movably connected to the third support element 501.

[0261] In some embodiments, the first moving element 502 is a moving wheel, including but not limited to rubber wheels, PU foam wheels, etc.

[0262] Furthermore, the first moving unit 500 also includes a transmission element 503. The transmission element 503 is connected to the two first moving elements 502 respectively for transmission.

[0263] In this invention, the transmission element 503 enables the two first moving elements 502 to rotate simultaneously.

[0264] In some of these embodiments, the transmission element 503 includes, but is not limited to, a transmission shaft.

[0265] like Figure 10As shown, the second moving unit 600 includes two fourth support elements 601 and two second moving elements 602. The two fourth support elements 601 are symmetrically arranged at the bottom end of the handrail unit 300 and are respectively connected to the handrail unit 300; the two second moving elements 602 are respectively movably arranged on the corresponding fourth support elements 601 for movement.

[0266] Specifically, the two fourth support elements 601 are respectively disposed at the bottom end of the corresponding longitudinal handrail element 301 and are respectively connected to the corresponding longitudinal handrail element 301.

[0267] In some embodiments, the fourth support element 601 includes a connector and a first support element. The connector is inserted into the bottom end of the corresponding longitudinal handrail element 301; the top end of the first support element is rotatably connected to the bottom end of the connector and is movably connected to the corresponding second movable element 602.

[0268] In this invention, the direction of movement of the second moving element 602 can be changed by adopting this method.

[0269] In some of these embodiments, the fourth support element 601 includes, but is not limited to, a mounting bracket.

[0270] The dimensions of the second moving element 602 are matched with the dimensions of the first moving element 502. Generally, the radial dimension (e.g., wheel diameter) of the second moving element 602 is not greater than the radial dimension (e.g., wheel diameter) of the first moving element 502.

[0271] Preferably, the radial dimension (e.g., wheel diameter) of the second moving element 602 is smaller than the radial dimension (e.g., wheel diameter) of the first moving element 502.

[0272] In some embodiments, the second moving element 602 is a moving wheel, including but not limited to rubber wheels, PU foam wheels, etc.

[0273] Furthermore, such as Figures 10-11 As shown, the second moving unit 600 also includes two braking elements 603. The two braking elements 603 are respectively movably disposed on the corresponding fourth bracket element 601, and are used to lock or unlock the corresponding second moving element 602.

[0274] When the brake element 603 is in the locked position, the second moving element 602 cannot rotate relative to the fourth support element 601; when the brake element 603 is in the unlocked position, the second moving element 602 can rotate relative to the fourth support element 601.

[0275] In some embodiments, the braking element 603 includes, but is not limited to, a lever-type braking structure. It should be noted that the braking element 603 is prior art and will not be described further here.

[0276] Furthermore, the new trolley device also includes a locking unit 700. The locking unit 700 is disposed on the frame unit 100 and is removably locked to the armrest unit 300, and is used to lock the armrest unit 300 and unlock the armrest unit 300 to allow the armrest unit 300 to move relative to the frame unit 100 when the new trolley device is in two-wheel mode.

[0277] like Figures 12-13 As shown, the locking unit 700 includes two fifth support elements 701, two seventh limiting elements 702, a first control element 703, two second control elements 704, and two locking elements 705. The two fifth support elements 701 are symmetrically arranged on the frame unit 100; the two seventh limiting elements 702 are respectively disposed on the corresponding fifth support elements 701, for connecting to the armrest unit 300 when the new trolley device is in two-wheel mode; the first control element 703 is movably disposed between the two fifth support elements 701; the two second control elements 704 are respectively movably disposed on the corresponding fifth support elements 701 and respectively connected to both ends of the first control element 703, for rotating under the action of the first control element 703; the two locking elements 705 are respectively movably disposed on the corresponding fifth support elements 701 and respectively contact the corresponding second control elements 704, and are removably locked to the armrest unit 300, for locking the armrest unit 300 and releasing the armrest unit 300 under the action of the second control element 704.

[0278] Specifically, the two fifth bracket elements 701 are respectively disposed on the corresponding longitudinal frame elements 101 and are respectively connected to the corresponding longitudinal frame elements 101; the two seventh limiting elements 702 are respectively removably limited connected to the first connecting element 304; the two locking elements 705 are respectively removably locked connected to the first connecting element 304, for locking the first connecting element 304 or releasing the first connecting element 304.

[0279] In some embodiments, the fifth support element 701 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or elements) by bolts (groups).

[0280] The fifth bracket element 701 is detachably connected to the longitudinal frame element 101, including but not limited to plug-in, snap-fit, and bolt (group) connections. For example, the fifth bracket element 701 can be plugged into the longitudinal frame element 101 first, and then connected using bolts (groups), which can improve the connection strength.

[0281] In some embodiments, the fifth support element 701 is U-shaped. Specifically, the open end of the fifth support element 701 is inserted into the longitudinal frame element 101.

[0282] In some of these embodiments, the fifth support element 701 includes, but is not limited to, a mounting bracket.

[0283] The seventh limiting element 702 is set through the fifth support element 701.

[0284] In some of these embodiments, the seventh limiting element 702 includes, but is not limited to, a limiting groove.

[0285] The first control element 703 is rotatably connected to the two fifth support elements 701 respectively.

[0286] In some embodiments, the first control element 703 includes a first control member and two second control members. The first control member is movably disposed between the two fifth support elements 701; the two second control members are respectively disposed at both ends of the first control member and are rotatably connected to the corresponding fifth support element 701 and plugged into the corresponding second control element 704, for driving the corresponding second control element 704 to rotate under the action of the first control member.

[0287] In some of these embodiments, the first control element has a circular cross-section.

[0288] In some embodiments, the cross-section of the second control member is non-circular. Specifically, at least a portion of the outer edge surface of the second control member is not coplanar with at least a portion of the outer edge surface of the first control member. For example, the second control member and the first control member form a convex structure or an L-shaped structure.

[0289] In some of these embodiments, the first control element 703 includes, but is not limited to, a joystick, a control shaft, etc.

[0290] Two second control elements 704 are respectively movably disposed inside the corresponding fifth support element 701. For example, the second control element 704 can be connected to the fifth support element 701 via a rotating shaft (or a similar structure), or the second control element 704 can rotate following the first control element 703.

[0291] Furthermore, the two second control elements 704 can also be connected to the fifth support element 701 via a reset structure (such as a torsion spring). This reset structure is prior art and will not be described in detail here.

[0292] In some of these embodiments, the second control element 704 is U-shaped.

[0293] In some embodiments, the second control element 704 includes a third control member and a protrusion. The third control member is inserted into the second control member of the first control element 703 and is used to rotate under the action of the second control member. The protrusion is disposed on the side of the third control member and abuts against the corresponding locking element 705, and is used to rotate with the second control member to drive the corresponding locking element 705 to move upward or downward.

[0294] In some embodiments, there may be one or two protrusions. The two protrusions are symmetrically arranged and abut against the locking element 705 respectively.

[0295] In some of these embodiments, the second control element 704 includes, but is not limited to, a control bracket.

[0296] Two locking elements 705 are movably disposed inside the corresponding fifth support element 701. For example, the locking element 705 can be connected to the fifth support element 701 via a rotating shaft (or a similar structure).

[0297] In some of these embodiments, the locking element 705 is U-shaped.

[0298] In some embodiments, the locking element 705 includes a second support member and a recessed member. The second support member is rotatably disposed inside the corresponding fifth support member 701; the recessed member is disposed on the side of the second support member and abuts against the protrusion of the second control element 704, and is removably locked to the first connecting element 304, for rotating the second support member under the action of the protrusion to lock or release the first connecting element 304.

[0299] In some embodiments, there may be one or two recessed elements. The two recessed elements are symmetrically arranged and abut against the protrusions of the second control element 704, respectively.

[0300] In some of these embodiments, the locking element 705 includes, but is not limited to, a locking bracket.

[0301] Furthermore, the locking unit 700 also includes a third control element. The third control element is connected to the first control element 703 and is used to control the first control element 703.

[0302] The third control element is fixedly connected to the first control element 703 or detachably connected, including but not limited to plug-in, snap-fit, bolt (group) connection, etc.

[0303] In some embodiments, the third control element includes, but is not limited to, a control panel, a control handle, etc.

[0304] In this invention, the third control element can be used to form the operating arm or operating platform of the first control element 703, making it convenient for the user to apply force to the first control element 703.

[0305] Furthermore, the new trolley device also includes a baffle unit 800. The baffle unit 800 is disposed at the second end of the frame unit 100 and is used to place items when the new trolley device is in two-wheel mode.

[0306] Specifically, the baffle unit 800 is connected to the second end of each of the two longitudinal frame elements 101.

[0307] In some embodiments, the baffle unit 800 is provided with a plurality of hole structures and / or a plurality of groove structures and / or a plurality of protrusion structures for plugging, snapping or connecting with other structural units (or components) by bolts (groups).

[0308] The baffle unit 800 is detachably connected to the longitudinal frame element 101, including but not limited to plug-in, snap-in, and bolt (group) connections. For example, the baffle unit 800 can be plugged into the longitudinal frame element 101 first, and then connected using bolts (groups), which can improve the connection strength.

[0309] In some of these embodiments, the baffle unit 800 includes, but is not limited to, a baffle, a shelf, etc.

[0310] The method of using this utility model is as follows:

[0311] (I) Two-wheel mode

[0312] When the new trolley device is in two-wheel mode, the items to be transported are placed on the baffle unit 800 and then moved by the first moving unit 500 (i.e., the two first moving elements 502).

[0313] (II) Two-wheel mode → Four-wheel mode

[0314] Operating the first control element 703 (for example, pressing the third control element to make the first control element 703 rotate) causes the two second control elements 704 to rotate counterclockwise, causing the two locking elements 705 to rotate clockwise, thereby changing the groove of the two locking elements 705 from being perpendicular to the seventh limiting element 702 to being parallel to the seventh limiting element 702, so that the first connecting element 304 can be separated from the locking element 705 and the seventh limiting element 702;

[0315] The horizontal handrail element 302 is operated, and the two vertical handrail elements 301 and the two second sleeve elements 408 drive the two first sleeve elements 406 to rotate relative to the two second support elements 401 until the two first sleeve elements 406 respectively abut against the first vertical positioning surface of the corresponding first positioning element 404 and the second vertical positioning surface of the second positioning element 405.

[0316] Under the combined action of the frame unit 100's own weight and the lateral handrail element 302, the two longitudinal handrail elements 301 slide against the corresponding second sleeve element 408.

[0317] With the frame unit 100 parallel to the horizontal plane, the first connecting element 304 is respectively limited and connected to the two third limiting elements 409, and a number of second limiting elements 306 are respectively limited and connected to the corresponding fourth limiting elements 410. At this time, the new trolley device is in four-wheel mode.

[0318] The stacking box is placed on the fixing unit 200, and the stacking box cooperates with the recessed element 202 and the protruding element 203 located on both sides of it to achieve the effect of fixing the stacking box to the frame unit 100.

[0319] Movement is achieved through the cooperation of the first moving unit 500 (i.e., two first moving elements 502) and the second moving unit 600 (i.e., two second moving elements 602);

[0320] The stopping operation can be completed by operating the brake element 603 without moving the vehicle.

[0321] (III) Four-wheel mode → Two-wheel mode

[0322] The transverse frame element 102 is operated (lifted upward) so that the first connecting element 304 is separated from the two third limiting elements 409 respectively, and the several second limiting elements 306 are separated from the corresponding fourth limiting elements 410 respectively.

[0323] Continue operating on the transverse frame element 102 (lift it upwards), and drive the two second support elements 401 to rotate relative to the two first sleeve elements 406 through the two longitudinal frame elements 101;

[0324] Continue operating the transverse frame element 102 (lift it upwards), and drive the two longitudinal frame elements 101, the two second support elements 401, and the two first sleeve elements 406 to slide the two second sleeve elements 408 with the corresponding longitudinal handrail elements 301 respectively, until the several first limit elements 305 are respectively limited and connected to the corresponding fifth limit element 415 and the corresponding sixth limit element 416.

[0325] Continue operating the transverse frame element 102 (lifting it upwards) and / or the transverse handrail element 302 until the two first sleeve elements 406 respectively abut against the first transverse positioning surface of the corresponding first positioning element 404 and the second transverse positioning surface of the second positioning element 405.

[0326] At this time, the frame unit 100 is perpendicular to the horizontal plane, the first moving unit 500 is in contact with the ground, and the second moving unit 600 is suspended in the air;

[0327] Operating the first control element 703 (e.g., pressing the third control element to rotate the first control element 703) causes the two second control elements 704 to rotate counterclockwise, causing the two locking elements 705 to rotate clockwise, thereby changing the groove of the two locking elements 705 from being perpendicular to the seventh limiting element 702 to being parallel to the seventh limiting element 702, so that the first connecting element 304 enters the locking element 705 through the seventh limiting element 702;

[0328] By operating the first control element 703 (or by using the reset structure), the two second control elements 704 are rotated clockwise, causing the two locking elements 705 to rotate counterclockwise. This causes the grooves of the two locking elements 705 to change from being parallel to the seventh limiting element 702 to being perpendicular to the seventh limiting element 702, thereby locking the first connecting element 304.

[0329] The technical effects of this utility model are as follows:

[0330] 1) Using fixing units to secure stacked boxes can effectively prevent them from jumping, tipping over, and sliding during transportation;

[0331] 2) The stacking boxes can be quickly and easily fixed using the fixing unit. Through nested connection, the stacking boxes can be quickly installed and separated without the need for additional fixing ropes, binding ropes or other structures, resulting in a high degree of integration.

[0332] 3) Improve the rotation method of the frame unit and the handrail unit by using movable units to increase service life, avoid wobbling, and improve stability.

[0333] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel trolley device, characterized in that, include: Chassis unit; At least one fixing unit is provided on the frame unit for detachable connection with both sides of the stacking box; The armrest unit is movably connected to the frame unit and is used to cooperate with the frame unit to enable the new trolley device to switch between two-wheel mode and four-wheel mode; An active unit is disposed between the first end of the frame unit and the first end of the armrest unit, for enabling relative movement between the armrest unit and the frame unit; A first moving unit is disposed at the second end of the frame unit and is used for moving; The second moving unit is disposed at the first end of the handrail unit and is used for moving.

2. The novel trolley device according to claim 1, characterized in that, The chassis unit includes: Two longitudinal frame elements are symmetrically arranged. The fixed unit is provided on the side of each of the two longitudinal frame elements. The movable unit is provided at the first end of each of the two longitudinal frame elements. The first moving unit is provided at the second end of each of the two longitudinal frame elements. A transverse frame element is disposed between two longitudinal frame elements, and both ends of the transverse frame element are respectively connected to the two longitudinal frame elements.

3. The novel trolley device according to claim 2, characterized in that, The chassis unit also includes: At least one reinforcing element is disposed between the two longitudinal frame elements, and the two ends of the reinforcing element are respectively connected to the two longitudinal frame elements.

4. The novel trolley device according to claim 1, characterized in that, The fixing unit includes: Two fixing elements are symmetrically arranged on both sides of the frame unit; A plurality of recessed elements are respectively disposed on the corresponding fixing elements and respectively connected to both sides of the stacking box; A plurality of protruding elements are respectively disposed on the corresponding fixed elements and located on the side of the corresponding recessed elements, and respectively connected to the two sides of the stacking box.

5. The novel trolley device according to claim 1, characterized in that, The armrest unit includes: Two longitudinal handrail elements are symmetrically arranged and are respectively movably connected to the movable unit; A transverse handrail element is disposed between two longitudinal handrail elements, and both ends of the transverse handrail element are respectively connected to the second ends of the two longitudinal handrail elements; Two first support elements are respectively disposed at the first end of the corresponding longitudinal handrail element and respectively connected to the second moving unit; A first connecting element is disposed between the two first support elements, with both ends of the first connecting element connected to the two first support elements respectively, for connecting to the movable unit when the novel trolley device is in four-wheel mode; and / or The activity unit includes: Two second support elements are symmetrically arranged at the first end of the frame unit; Two first rotating elements are respectively disposed on corresponding second support elements; Two extension elements are respectively disposed at the bottom of the corresponding second support element; Two first positioning elements are respectively disposed on corresponding second support elements; Two second positioning elements are respectively disposed on the corresponding extension elements; Two first sleeve elements are respectively movably disposed on the side of the corresponding second bracket element and respectively connected to the corresponding first positioning element and the corresponding second positioning element, for stopping in two-wheel mode or four-wheel mode under the action of the first positioning element and the second positioning element; Two second rotating elements are respectively disposed on the side of the corresponding first sleeve element and are detachably and movably connected to the corresponding first rotating element, for relative rotation with the first rotating element under the action of the first sleeve element; Two second sleeve elements are respectively disposed on the corresponding first sleeve elements and are movably connected to the handrail unit, and are used to drive the first sleeve elements to switch between two-wheel mode and four-wheel mode under the action of the handrail unit.

6. The novel trolley device according to claim 5, characterized in that, The armrest unit also includes: A plurality of first limiting elements, each disposed on a corresponding longitudinal armrest element, are used to connect with the movable unit when the novel trolley device is in two-wheel mode; and / or The armrest unit also includes: A plurality of second limiting elements, each disposed on a corresponding first support element, are used to connect with the movable unit when the novel trolley device is in four-wheel mode; and / or The activity unit also includes: A plurality of third limiting elements, each disposed at the bottom end of a corresponding extension element, are used for limiting connection with the armrest unit when the novel trolley device is in four-wheel mode; and / or The activity unit also includes: A plurality of fourth limiting elements, each of which is disposed at the bottom end of a corresponding extension element, are used for limiting connection with the armrest unit when the novel trolley device is in four-wheel mode; and / or The activity unit also includes: A plurality of second connecting elements are respectively disposed at the top end of the corresponding first sleeve element; A plurality of third connecting elements, each of which is disposed at the top end of a corresponding second sleeve element and connected to a corresponding second connecting element; and / or The activity unit also includes: A plurality of fourth connecting elements are respectively disposed at the bottom end of the corresponding first sleeve element; A plurality of fifth connecting elements, each of which is disposed at the bottom end of a corresponding second sleeve element and connected to a corresponding fourth connecting element; and / or The activity unit also includes: A plurality of fifth limiting elements, each of which is disposed at the top end of a corresponding first sleeve element, are used for limiting connection with the armrest unit when the novel trolley device is in two-wheel mode; and / or The activity unit also includes: A plurality of sixth limiting elements are respectively disposed at the top end of the corresponding second sleeve element, for limiting connection with the handrail unit when the new trolley device is in two-wheel mode.

7. The novel trolley device according to claim 1, characterized in that, The first moving unit includes: Two third support elements are symmetrically arranged at the second end of the frame unit and connected to the frame unit respectively; Two first movable elements, each movably disposed on a corresponding third support element, are used for movement; and / or The second moving unit includes: Two fourth support elements are symmetrically arranged at the bottom end of the handrail unit and are respectively connected to the handrail unit; Two second moving elements are respectively movably disposed on the corresponding fourth support element for movement.

8. The novel trolley device according to claim 7, characterized in that, The first moving unit further includes: Transmission elements, which are respectively connected to the two first moving elements for transmission; and / or The second moving unit further includes: Two braking elements are respectively movably disposed on the corresponding fourth bracket element, for locking or unlocking the corresponding second moving element.

9. The novel trolley device according to any one of claims 1 to 8, characterized in that, Also includes: A locking unit is disposed on the frame unit and removably locked to the armrest unit, for locking the armrest unit when the new trolley device is in two-wheel mode and unlocking the armrest unit to allow the armrest unit to move relative to the frame unit. and / or A baffle unit is disposed at the second end of the frame unit for placing items when the new trolley device is in two-wheel mode.

10. The novel trolley device according to claim 9, characterized in that, The locking unit includes: Two fifth support elements are symmetrically arranged on the frame unit; Two seventh limiting elements are respectively disposed on the corresponding fifth bracket elements, and are used to connect with the handrail unit when the new trolley device is in two-wheel mode; A first control element is movably disposed between the two fifth support elements; Two second control elements are respectively movably disposed on the corresponding fifth support element and respectively connected to both ends of the first control element, for rotating under the action of the first control element; Two locking elements are respectively movably disposed on the corresponding fifth support element and respectively contact the corresponding second control element, and respectively are removably locked to the handrail unit, for locking the handrail unit and releasing the handrail unit under the action of the second control element.

Images