A foldable trolley

Abstract

The utility model provides a foldable storage cart, which comprises a base, an upper frame arranged above the base, a folding assembly, a lower support pipe, an upper support pipe, an actuating member, and a pin, wherein the lower end of the lower support pipe is rotationally connected to the base, and the rotation axis is a first direction extending in the transverse direction of the lower support pipe; the upper support pipe is arranged side by side with the lower support pipe along the first direction, the upper end of the upper support pipe is rotationally connected to the upper frame, the lower end of the upper support pipe is rotationally connected to the middle part of the lower support pipe, and the middle part of the upper support pipe and the upper part of the corresponding lower support pipe are constrained together through the pin extending in the transverse direction, so as to support the upper frame on the base; the actuating member acts on the pin to move the pin and release the constraint between the upper support pipe and the lower support pipe, so that the upper support pipe and the lower support pipe can be relatively rotated to fold the upper frame downward relative to the base. The utility model can complete folding without damaging the structure of the base and the upper frame, and ensures the overall structural strength of the storage cart.

Description

Technical Field

[0001] This utility model belongs to the field of walking cart technology, specifically relating to a foldable storage cart. Background Technology

[0002] Most foldable storage carts on the market fold by breaking the upper frame or base. For example, the Chinese utility model patent with application number CN202420752451.X, "A Folding Frame for Camp Vehicles" (authorization announcement number CN221893117U), includes a wheel module, a fixing rod, a folding base, and a folding fence frame. The fixing rod is fixedly installed on the wheel module. The folding base can be folded upwards and unfolded downwards and installed on the fixing rod. The folding fence frame can be retracted inwards and unfolded outwards and installed on the fixing rod. The folding fence frame includes front and rear fences and left and right fences arranged symmetrically. The front and rear fences are composed of two sets of vertically symmetrical and hinged V-shaped two-link rods. The left and right fences are composed of two sets of vertically symmetrical and hinged wave-shaped three-link rods.

[0003] Breaking the upper frame or base to fold it down will result in varying degrees of loss of the integrity and rigidity of the upper frame or base. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a foldable storage cart that can be folded without damaging the base and upper frame structure, thus ensuring the overall structural strength of the storage cart.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a foldable storage cart, comprising:

[0006] The base is equipped with wheels that allow it to move.

[0007] The upper frame is located above the base;

[0008] Folding components;

[0009] The folding assembly is characterized by comprising:

[0010] A vertically extending lower support tube has its lower end rotatably connected to the base, and the direction of the extension of the rotation axis is defined as the first direction of the lateral extension of the lower support tube.

[0011] A vertically extending upper support tube is arranged side by side with the lower support tube along the first direction. The upper end of the upper support tube is rotatably connected to the upper frame and the axis of rotation extends along the first direction. The lower end of the upper support tube is rotatably connected to the middle part of the lower support tube and the axis of rotation extends along the first direction. The middle part of the upper support tube and the upper part of the corresponding lower support tube are constrained together by a horizontally extending pin, thereby supporting the upper frame on the base.

[0012] An actuator acts on the pin to move the pin and release the constraint between the upper and lower support tubes, thereby allowing the upper and lower support tubes to rotate relative to each other and causing the upper frame to retract downward relative to the base.

[0013] By designing the folding assembly as a structure with a lower support tube, an upper support tube, and an actuator, the folding assembly provides support during normal use, holding the upper frame on the base. When folding is required, the actuator acts on a pin, causing the pin to move and releasing the constraint between the upper and lower support tubes. This allows the upper and lower support tubes to rotate relative to each other, causing the upper frame to fold downwards relative to the base, thus achieving the folding and collapsing of the storage cart. The structural design of this folding assembly allows folding to be completed without damaging the base or upper frame structure, ensuring the overall structural strength of the storage cart.

[0014] Preferably, when folded, the lower support tube extends horizontally, and the upper support tube is arranged at an acute angle to the lower support tube. After folding, the upper frame can be as close to the base as possible, making the folded storage cart smaller in size.

[0015] Preferably, there are two lower support tubes, which are arranged at intervals along the first direction, and the upper ends of the two lower support tubes are connected to form an inverted U-shape.

[0016] There are two upper support tubes, which are arranged on both sides of the two lower support tubes, and each upper support tube is constrained to the corresponding lower support tube by its own pin; the two pins move synchronously under the action of the actuator.

[0017] The aforementioned actuators can be power-driven components such as telescopic mechanisms.

[0018] Preferably, the pin extends along the first direction, the first end of the pin passes through the through hole of the lower support tube and is inserted into the insertion hole of the upper support tube, and the second end of the pin is located outside the through hole of the lower support tube.

[0019] The actuator includes:

[0020] The base is connected to the lower support tube;

[0021] The button is constrained to the base and can move upward to the first position under the action of external force;

[0022] A transmission component connects the button and the second end of the pin, and is arranged to convert the upward movement force of the button into movement of the pin in a first direction, causing the first end of the pin to disengage from the insertion hole of the upper support tube.

[0023] A first elastic element acts on the button so that the button always tends to move downward to the second position, and when the button is in the second position, the first end of the pin is inserted into the socket of the upper support tube.

[0024] It can be operated simply by pressing the button manually.

[0025] Preferably, the base is provided with a first guide groove extending in a first direction;

[0026] Correspondingly, the button is provided with a second guide groove, which is inclined upward along the direction from the second end of the pin to the first end;

[0027] The second end of the pin is provided with a pin shaft perpendicular to the pin. The pin shaft is inserted into the first guide groove and the second guide groove, and constitutes the transmission component.

[0028] Furthermore, the second end of the pin is provided with a strip-shaped hole extending along its length direction, the pin passes through the strip-shaped hole and can move along the strip-shaped hole, and the pin always has a tendency to move closer to the second end of the pin under the action of the second elastic element.

[0029] Furthermore, the base connects two lower support tubes, and the button is located between the two lower support tubes. The base design improves the overall structural stability, and the button's location between the two lower support tubes ensures its press operation.

[0030] Preferably, with the forward direction of the base as the front side, there are two sets of folding components, which are arranged opposite each other, one in front of the other, and the first direction is the left-right direction.

[0031] In the above schemes, preferably, the upper frame and the base are both horizontally arranged and connected end to end as tubes.

[0032] Compared with existing technologies, the advantages of this invention are as follows: By designing the folding assembly as a structure with a lower support tube, an upper support tube, and an actuator, the folding assembly provides support during normal use, supporting the upper frame on the base. When folding is required, the actuator acts on the pin, causing the pin to move and releasing the constraint between the upper and lower support tubes. This allows the upper and lower support tubes to rotate relative to each other, causing the upper frame to fold downwards relative to the base, thus achieving the folding and collapsing of the storage cart. The structural design of the folding assembly of this invention allows folding to be completed without damaging the base or upper frame structure, ensuring the overall structural strength of the storage cart. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the storage cart according to an embodiment of the present utility model (the upper frame is supported on the base and the two are unfolded relative to each other);

[0034] Figure 2 for Figure 1 Front view of the storage cart;

[0035] Figure 3 This is a schematic diagram of the base, upper frame, and folding assembly of an embodiment of the present utility model (the upper frame is folded downward relative to the base);

[0036] Figure 4 for Figure 3 The front view;

[0037] Figure 5 This is a schematic diagram of the base, upper frame, and folding assembly of an embodiment of the present utility model (the upper frame is further folded downward relative to the base);

[0038] Figure 6 for Figure 5 The front view;

[0039] Figure 7 This is a schematic diagram of the structure of the folding component according to an embodiment of the present utility model;

[0040] Figure 8 This is a partial structural schematic diagram of the folding component according to an embodiment of the present utility model;

[0041] Figure 9 This is a cross-sectional view of a partial structure of the folding component according to an embodiment of the present invention. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] like Figures 1-9 As shown, this is a preferred embodiment of a foldable storage cart of the present invention, which includes a base 1, an upper frame 2, and a folding assembly.

[0044] Both the base 1 and the upper frame 2 are horizontally arranged tubes connected end to end. The base 1 is equipped with a traveling wheel 10 that can move the base 1. With the forward direction of the base 1 as the front side, there are four traveling wheels 10, and they are located in pairs on the front and back sides of the base 1 respectively.

[0045] The upper frame 2 is supported above the base 1 by a folding assembly and can be folded down relative to the base 1. The folding assembly includes a lower support tube 3, an upper support tube 4, a pin 5, and an actuator 6.

[0046] The lower support tube 3 extends vertically, and the lower end of the lower support tube 3 is rotatably connected to the base 1, with the axis of rotation being the first direction of left and right extension.

[0047] The upper support tube 4 extends vertically and is arranged side by side with the lower support tube 3 along the first direction. The upper end of the upper support tube 4 is rotatably connected to the upper frame 2 and the axis of rotation extends along the first direction. The lower end of the upper support tube 4 is rotatably connected to the middle part of the lower support tube 3 and the axis of rotation extends along the first direction. The middle part of the upper support tube 4 and the upper part of the corresponding lower support tube 3 are constrained together by a horizontally extending pin 5, thereby supporting the upper frame 2 on the base 1.

[0048] The actuator 6 acts on the pin 5 to move the pin 5 and release the constraint between the upper support tube 4 and the lower support tube 3, thereby allowing the upper support tube 4 and the lower support tube 3 to rotate relative to each other and move the upper frame 2 downward relative to the base 1. When retracted, the lower support tube 3 extends horizontally, and the upper support tube 4 and the lower support tube 3 are arranged at an acute angle.

[0049] In this embodiment, as Figures 7-9 As shown, there are two sets of folding components, arranged one in front of the other. Each set of folding components has two lower support tubes 3, which are spaced apart along the first direction. The upper ends of the two lower support tubes 3 are connected by a handle 30 to form an inverted U-shape. Each set of folding components has two upper support tubes 4, which are arranged on the left and right sides of the two lower support tubes 3. Each upper support tube 4 is constrained to the corresponding lower support tube 3 by its own pin 5, and the two pins 5 move synchronously under the action of the actuator 6.

[0050] Specifically, each pin 5 extends along the first direction and is arranged at intervals along the first direction. The first end 51 of each pin 5 passes through the through hole 31 of the corresponding lower support tube 3 and is inserted into the insertion hole 41 of the corresponding upper support tube 4, while the second end 52 of each pin 5 is located outside the through hole 31 of the corresponding lower support tube 3.

[0051] The actuator 6 includes a base 61, a button 62, a transmission element 63, and a first elastic element 64.

[0052] The base 61 connects to two lower support tubes 3 and is located below the handle 30.

[0053] Button 62 is constrained to base 61 and located between two lower support tubes 3, and button 62 can move upward to the first position under the action of external force.

[0054] The transmission component 63 connects the button 62 to the second end 52 of each pin 5, and is arranged to convert the upward moving force of the button 62 into the two pins 5 moving in a close proximity along the first direction, so that the first end 51 of each pin 5 disengages from the corresponding insertion hole 41 of the upper support tube 4. In this embodiment, the base 61 is provided with two first guide grooves 611 extending along the first direction at intervals, and correspondingly, the button 62 is provided with two second guide grooves 621. The second guide grooves 621 are inclined upward along the direction from the second end 52 of the corresponding pin 5 to the first end 51. The second end 52 of each pin 5 is provided with a pin 53 perpendicular to the pin 5. Each pin 53 is inserted into the corresponding first guide groove 611 and second guide groove 621, and constitutes the transmission component 63. Meanwhile, each pin 5 has a strip hole 521 extending along its length at its second end 52. Each pin 53 passes through the corresponding strip hole 521 and can move along the strip hole 521. Under the action of its corresponding second elastic member 54 (a spring extending left and right), each pin 53 always tends to move closer to the second end 52 of the pin 53.

[0055] The first elastic element 64 is a spring that extends vertically. It acts on the button 62 so that the button 62 always tends to move downward to the second position. When the button 62 is in the second position, the first end 51 of the pin 5 is inserted into the insertion hole 41 of the upper support tube 4.

[0056] When the storage cart is in normal use, such as Figure 1 , 2 As described above, the upper frame 2 is supported on the base 1 by two sets of folding components. At this time, the pin 53 connects the upper and lower support tubes, and the structure is stable.

[0057] like Figure 3 , 4 As shown, when the storage cart needs to be folded, simply press the button 62 in the front and rear folding components with both hands. At this time, the pin 53 moves under the action of the button 62 and the transmission component 63 and disengages from the upper support tube 3, thereby unlocking the folding components. Then, press down the handle 30 connecting the two lower support tubes 3, and the upper frame 2 will fold downward relative to the base 1.

[0058] like Figure 5 , 6As shown, the storage cart's volume will decrease after folding. Similarly, when the storage cart needs to be unfolded, simply grasp the two handles 30 with both hands and lift the upper frame 2 and the folding assembly. Since each folding assembly provides two support points, the front and rear folding assemblies provide relatively stable four-point support. After the folding assembly is unfolded, push each handle 30 outwards appropriately, and the first end 51 of each pin 53 can be inserted into the corresponding insertion hole 41 of the upper support tube to connect the upper and lower support tubes.

[0059] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0060] The term "vertical" is also used in the specification and claims of this utility model, meaning basically along the up and down direction, and is not limited to just the vertical direction, but can also be slightly deviated from the vertical direction.

Claims

1. A foldable storage cart, comprising: The base (1) is provided with wheels (10) that can move the base (1); The upper frame (2) is located above the base (1); Folding components; The folding assembly is characterized by comprising: The lower support tube (3) extends vertically, and its lower end is rotatably connected to the base (1), and the direction of the extension of the rotation axis is recorded as the first direction of the lateral extension of the lower support tube (3). The vertically extending upper support tube (4) is arranged side by side with the lower support tube (3) along the first direction. The upper end of the upper support tube (4) is rotatably connected to the upper frame (2) and the rotation axis extends along the first direction. The lower end of the upper support tube (4) is rotatably connected to the middle part of the lower support tube (3) and the rotation axis extends along the first direction. The middle part of the upper support tube (4) and the upper part of the corresponding lower support tube (3) are constrained together by a horizontally extending pin (5), thereby supporting the upper frame (2) on the base (1). The actuator (6) acts on the pin (5) to move the pin (5) and release the constraint between the upper support tube (4) and the lower support tube (3), so that the upper support tube (4) and the lower support tube (3) can rotate relative to each other and the upper frame (2) moves downward relative to the base (1).

2. The storage cart according to claim 1, characterized in that: When retracted, the lower support tube (3) extends horizontally, and the upper support tube (4) and the lower support tube (3) are arranged at an acute angle.

3. The storage cart according to claim 1, characterized in that: There are two lower support tubes (3), which are arranged at intervals along the first direction, and the upper ends of the two lower support tubes (3) are connected to form an inverted U-shape. There are two upper support tubes (4), which are arranged on both sides of the two lower support tubes (3), and each upper support tube (4) is constrained to the corresponding lower support tube (3) by its own pin (5); the two pins (5) move synchronously under the action of the actuator (6).

4. The storage cart according to claim 3, characterized in that: The pin (5) extends along the first direction. The first end (51) of the pin (5) passes through the through hole (31) of the lower support tube (3) and is inserted into the insertion hole (41) of the upper support tube (4). The second end (52) of the pin (5) is located outside the through hole (31) of the lower support tube (3). The actuator (6) includes: The base (61) is connected to the lower support tube (3); Button (62) is constrained to the base (61) and can move upward to the first position under the action of external force; The transmission component (63) connects the button (62) and the second end (52) of the pin (5) and is arranged to convert the upward movement force of the button (62) into the movement of the pin (5) in the first direction, so that the first end (51) of the pin (5) disengages from the insertion hole (41) of the upper support tube (4). The first elastic element (64) acts on the button (62) so that the button (62) always tends to move downward to the second position, and when the button (62) is in the second position, the first end (51) of the pin (5) is inserted into the socket (41) of the upper support tube (4).

5. The storage cart according to claim 4, characterized in that: The base (61) is provided with a first guide groove (611) extending in a first direction; Correspondingly, the button (62) is provided with a second guide groove (621), which is inclined upward along the direction from the second end (52) of the pin (5) to the first end (51); The second end (52) of the pin (5) is provided with a pin (53) perpendicular to the pin (5). The pin (53) is inserted into the first guide groove (611) and the second guide groove (621) and constitutes the transmission component (63).

6. The storage cart according to claim 5, characterized in that: The second end (52) of the pin (5) is provided with a strip hole (521) extending along its length direction. The pin (53) passes through the strip hole (521) and can move along the strip hole (521). Under the action of the second elastic member (54), the pin (53) always has a tendency to move closer to the second end (52) of the pin (53).

7. The storage cart according to claim 4, characterized in that: The base (61) is connected to two lower support tubes (3), and the button (62) is located between the two lower support tubes (3).

8. The storage cart according to claim 1, characterized in that: With the forward direction of the base (1) as the front side, there are two sets of folding components, which are arranged opposite each other, one in front and one behind, and the first direction is the left and right direction.

9. The storage vehicle according to any one of claims 1 to 8, characterized in that: The upper frame (2) and the base (1) are both horizontally arranged tubes connected end to end.

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