1. A movable carrier assembly, comprising:

a side plate assembly (10) with a moving wheel set (20) mounted at the bottom thereof;

the bottom plate assembly (30) is connected with the side plate assembly (10), the bottom plate assembly (30) is positioned at the lower part of the side plate assembly (10), and the bottom plate assembly (30) is matched with the side plate assembly (10) to form a containing space (40) for placing articles;

wherein the bottom plate component (30) at least has a first state and a second state, the accommodating space (40) can be expanded when the bottom plate component (30) is in the first state, and the accommodating space (40) can be contracted when the bottom plate component (30) is in the second state.

2. The movable carrier device according to claim 1, characterized in that the side plate assembly (10) comprises a plurality of first plates (11) and a plurality of second plates (12), the first plates (11) and the second plates (12) being alternately arranged and movably connected;

the bottom plate assembly (30) comprises a first fixed bottom plate (31) and a plurality of first connecting bottom plates (32), one ends of the first connecting bottom plates (32) are rotatably connected with the first fixed bottom plate (31), and the other ends of the first connecting bottom plates (32) are matched with the second plate bodies (12) one by one and rotatably connected with the second plate bodies;

when the first plate body (11) moves relative to the second plate body (12), the second plate body (12) can drive the first fixing bottom plate (31) to move upwards or downwards through the first connecting bottom plate (32).

3. The movable carrier device of claim 2, wherein the base assembly (30) further comprises a second fixed base (33), a plurality of second connecting bases (34), and a plurality of third connecting bases (35), the second fixed bottom plate (33) is positioned below the first fixed bottom plate (31), the second connecting bottom plate (34) and the third connecting bottom plate (35) are correspondingly positioned below the first connecting bottom plate (32), one end of the second connecting bottom plate (34) is rotationally connected with the second plate body (12), the other end of the second connecting bottom plate (34) is rotationally connected with the first fixed bottom plate (31), one end of the third connecting bottom plate (35) is rotatably connected with the middle part of the second connecting bottom plate (34), the other end of the third connecting bottom plate (35) is rotatably connected with the second fixing bottom plate (33).

4. Movable carrier device according to claim 2 or 3, characterized in that the number of first plates (11) is four and the number of second plates (12) is four;

the second plate body (12) comprises two side walls (121) which are connected, and the adjacent two first plate bodies (11) are respectively connected with the two side walls (121) of the second plate body (12) in a sliding manner.

5. The movable carrier device according to claim 4, wherein the first plate (11) is provided with a first sliding portion (111), and the second plate (12) is provided with a second sliding portion (122) slidably engaged with the first sliding portion (111).

6. The movable carrier device according to claim 5, wherein one of the first sliding portion (111) and the second sliding portion (122) is configured as a sliding slot, the other of the first sliding portion (111) and the second sliding portion (122) is configured as a sliding protrusion adapted to the sliding slot, and the first plate body (11) and the second plate body (12) are slidably connected through the sliding slot and the sliding protrusion.

7. The movable carrier device according to claim 5, wherein a fixing plate (50) covering the first sliding portion (111) and the second sliding portion (122) is detachably disposed on an outer side wall (121) of the first plate (11).

8. The movable carrier device of claim 5, further comprising a locking structure for limiting relative movement of the first panel (11) and the second panel (12).

9. The movable carrier device according to claim 5, wherein the movable wheel set (20) comprises four shock absorbing wheels (21), the shock absorbing wheels (21) are disposed in one-to-one correspondence with the second plate body (12), and the shock absorbing wheels (21) are connected to the bottom of the second plate body (12).

10. The movable carrier device according to claim 9, characterized in that the shock absorbing wheel (21) is detachably connected to the second plate (12).

Background

In the prior art, carrying devices (such as trolley cars, freight cars or shopping carts) are often used to transport articles. However, the existing carrying device has a single function, the accommodating space of the carrying device is usually fixed, the accommodating space cannot be adjusted according to needs, and the application range is small.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a movable carrying device, which can adjust the capacity of the accommodating space and has a wide application range.

According to an embodiment of the invention, a movable carrier device comprises: the bottom of the side plate component is provided with a movable wheel set; the bottom plate assembly is connected with the side plate assembly and is positioned at the lower part of the side plate assembly, and the bottom plate assembly and the side plate assembly are matched to form an accommodating space for accommodating articles; the bottom plate assembly at least has a first state and a second state, the accommodating space can be expanded when the bottom plate assembly is in the first state, and the accommodating space can be contracted when the bottom plate assembly is in the second state.

The movable carrying device provided by the embodiment of the invention has at least the following beneficial effects: by adopting the structure, when the bottom plate component is in the first state, the accommodating space of the carrying device can be expanded; when the bottom plate subassembly was in the second state, the accommodation space of carrying the thing device is collapsible, compares with prior art, and this technical scheme can adjust its accommodation space's capacity size, and accommodation range is big.

According to some embodiments of the invention, the side plate assembly comprises a plurality of first plate bodies and a plurality of second plate bodies, the first plate bodies and the second plate bodies being alternately arranged and movably connected; the bottom plate assembly comprises a first fixed bottom plate and a plurality of first connecting bottom plates, one ends of the first connecting bottom plates are rotatably connected with the first fixed bottom plate, and the other ends of the first connecting bottom plates are matched and rotatably connected with the second plate bodies one by one; when the first plate body moves relative to the second plate body, the second plate body can drive the first fixing bottom plate to move upwards or downwards through the first connecting bottom plate.

According to some embodiments of the present invention, the bottom plate assembly further includes a second fixing bottom plate, a plurality of second connecting bottom plates and a plurality of third connecting bottom plates, the second fixing bottom plate is located below the first fixing bottom plate, the second connecting bottom plates and the third connecting bottom plates are located below the first connecting bottom plates, one end of the second connecting bottom plate is rotatably connected to the second plate body, the other end of the second connecting bottom plate is rotatably connected to the first fixing bottom plate, one end of the third connecting bottom plate is rotatably connected to the middle of the second connecting bottom plate, and the other end of the third connecting bottom plate is rotatably connected to the second fixing bottom plate.

According to some embodiments of the invention, the number of the first plate bodies is four, and the number of the second plate bodies is four; the second plate body comprises two side walls which are connected, and the adjacent two first plate bodies are respectively connected with the two side walls of the second plate body in a sliding manner.

According to some embodiments of the present invention, the first plate body is provided with a first sliding portion, and the second plate body is provided with a second sliding portion slidably engaged with the first sliding portion.

According to some embodiments of the present invention, one of the first sliding portion and the second sliding portion is configured as a sliding groove, the other of the first sliding portion and the second sliding portion is configured as a sliding protrusion adapted to the sliding groove, and the first plate and the second plate are slidably connected through the sliding groove and the sliding protrusion.

According to some embodiments of the present invention, a fixing plate covering the first sliding portion and the second sliding portion is detachably disposed on an outer side wall of the first plate.

According to some embodiments of the invention, the locking structure is configured to limit relative movement between the first plate and the second plate.

According to some embodiments of the present invention, the moving wheel set includes four damping wheels, the damping wheels are disposed in one-to-one correspondence with the second plate, and the damping wheels are connected to the bottom of the second plate.

According to some embodiments of the invention, the shock absorbing wheel is detachably attached to the second plate.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.