Single or double-layer switchable folding stroller
By designing a folding trolley that can switch between single and double layers, and utilizing the combination of a U-shaped frame and limiting components, the problem of insufficient carrying capacity of existing folding trolleys is solved, realizing flexible switching of trolley states and expansion of carrying space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUYI INSTINCT OUTDOOR PROD CO LTD
- Filing Date
- 2025-09-23
- Publication Date
- 2026-07-10
AI Technical Summary
Existing folding trolleys have a single-layer structure when unfolded, which limits their carrying capacity and cannot meet the needs of transporting large quantities of goods. They are also inconvenient to operate.
A folding trolley that can switch between single and double layers was designed. By cooperating with the U-shaped frame and the limiting component, the trolley can be switched between single and double layer states. The movement of the U-shaped frame creates a bottom cavity to increase the carrying space.
It enables convenient switching between single-layer and double-layer modes of the trolley, improving its carrying capacity and allowing more items to be transported at once. It is also simple and convenient to operate.
Smart Images
Figure CN224476963U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a folding trolley, and more particularly to a folding trolley that can switch between single and double layers. Background Technology
[0002] Folding trolleys are foldable and towable cargo carts. They are widely used for moving things because they are easy to use, can carry goods, are easy to store, and save time and effort. They are now often used in outdoor activities or short-distance transportation.
[0003] Existing folding trolleys have a single-layer structure when unfolded. When a large amount of goods need to be transported, the carrying capacity of a single trolley is limited, requiring multiple trips, which is inconvenient. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a folding trolley that can be switched between single and double layers, carries more items, and is easy to operate.
[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a single- or double-layer switchable folding trolley, including a bottom folding frame one and two sets of support frames located at the front and rear ends of the bottom folding frame one respectively. A bottom folding frame two and two sets of side folding support frames arranged symmetrically on the left and right are provided between the two sets of support frames. The two sets of support frames have the same structure, including a U-shaped frame and two support rods. The bottom end of the support rod is fixedly connected to the bottom folding frame one. The two ends of the U-shaped frame are respectively connected to the two support rods and slidably connected with them. The upper and lower ends of the support rods are respectively provided with a first limiting member and a second limiting member for restricting the movement of the U-shaped frame.
[0006] In the first state, the U-shaped frame overlaps with the support rod, the U-shaped frame is locked on the second limiting member, and the bottom folding frame two and the bottom folding frame one approach each other. At this time, the trolley is in a single-layer state.
[0007] In the second state, the U-shaped frame moves upward, and the second bottom folding frame gradually separates from the first bottom folding frame to form a bottom cavity until the U-shaped frame is stuck on the first limiting piece. At this time, the trolley is in a double-layer state.
[0008] A further preferred embodiment of this utility model is as follows: the two ends of the U-shaped frame are respectively sleeved on two support rods. In the first state, the U-shaped frame is completely sleeved on the support rods and its bottom abuts against the second limiting member.
[0009] A further preferred embodiment of this utility model is: the U-shaped frame is provided with an unlocking key that is adapted to the first limiting member / second limiting member, and the unlocking key is used to push the first limiting member / second limiting member to move so that the limiting member is released from the U-shaped frame.
[0010] A further preferred embodiment of this utility model is as follows: a connecting sleeve is provided at the bottom of the U-shaped frame, the unlocking key is rotatably connected to the connecting sleeve, and pressing the unlocking key pushes the first limiting member / second limiting member to move.
[0011] A further preferred embodiment of this utility model is as follows: the first limiting member and the second limiting member have the same structure, which is a push rod. One end of the push rod extends out of the support rod, and a return spring is provided between the other end of the push rod and the inner wall of the support rod.
[0012] A further preferred embodiment of this utility model is as follows: a positioning hole is provided on the outer wall of the U-shaped frame. When the U-shaped frame is moved, the positioning hole is moved to the position of the first limiting member / second limiting member, and the first limiting member / second limiting member is inserted into the positioning hole.
[0013] A further preferred embodiment of this utility model is as follows: the side folding support frame includes a vertical rod and two diagonal braces, the top ends of the two diagonal braces are axially connected, the bottom ends of the two diagonal braces are respectively axially connected to the bottom ends of the front and rear U-shaped frames, the top end of the vertical rod is axially connected at the axial connection point of the top ends of the two diagonal braces, and the bottom end of the vertical rod is slidably connected to the bottom folding frame.
[0014] A further preferred embodiment of this utility model is as follows: the middle part of the bottom folding frame 2 is a pivot, a guide groove is provided on the vertical rod, and the pivot is located in the guide groove and can move within the guide groove.
[0015] A further preferred embodiment of this utility model is: a U-shaped side frame is provided between the side folding support frame and the two front and rear U-shaped frames, and the two U-shaped side frames are respectively engaged with the two front and rear U-shaped frames.
[0016] A further preferred embodiment of this utility model is as follows: the inner ends of the two U-shaped side frames are axially connected to the side folding support frame, and each of the two U-shaped frames is provided with a buckle, and the two U-shaped side frames are engaged with the buckle.
[0017] Compared with the prior art, the advantage of this utility model is that the upper U-shaped frame drives the lower folding frame two to move upward, so that the lower folding frame two and the lower folding frame one form a bottom cavity for placing items, which can realize the transformation of the trolley into a double layer, so that more items can be transported at a time, and the single-double layer switching operation is convenient. Attached Figure Description
[0018] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.
[0019] Figure 1 This is a schematic diagram of the cart in a single-layer configuration.
[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0021] Figure 3 This is a schematic diagram of the stroller in a semi-folded state.
[0022] Figure 4 This is a diagram showing the stroller in its folded state.
[0023] Figure 5 This is a schematic diagram of the cart in its double-layer configuration;
[0024] Figure 6 This is a schematic diagram of the cart in its double-layer configuration;
[0025] Figure 7 for Figure 6 Enlarged view of point B in the image;
[0026] Figure 8 for Figure 6 Enlarged view of point C in the image;
[0027] In the diagram: 1. Bottom folding frame one; 2. Support frame; 21. U-shaped frame; 22. Support rod; 23. Positioning hole; 3. Bottom folding frame two; 31. Rotating shaft; 4. Side folding support frame; 41. Vertical rod; 42. Diagonal brace; 43. Guide groove; 5. U-shaped side frame; 51. Buckle; 6. First limiting component; 7. Second limiting component; 8. Unlock button; 81. Connecting sleeve; 9. Bottom cavity. Detailed Implementation
[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.
[0029] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.
[0030] The single- or double-layer switchable folding trolley includes a bottom folding frame 1 and two sets of support frames 2 located at the front and rear ends of the bottom folding frame 1 respectively. A second bottom folding frame 3 and two sets of side folding support frames 4 are arranged symmetrically on the left and right sides between the two sets of support frames 2.
[0031] The two sets of support frames 2 have the same structure, including a U-shaped frame 21 and two support rods 22. The bottom end of the support rod 22 is fixedly connected to the bottom folding frame 1. The two ends of the U-shaped frame 21 are respectively connected to the two support rods 22 and slidably connected with them. Furthermore, the two ends of the U-shaped frame 21 are respectively sleeved on the two support rods 22.
[0032] The bottom folding frame 23 and the two sets of side folding support frames 4 are located between the front and rear U-shaped frames 21. The bottom folding frame 23 and the two sets of side folding support frames 4 move up and down with the U-shaped frames 21.
[0033] The two sets of side folding support frames 4 have the same structure, including a vertical rod 41 and two diagonal braces 42. The top ends of the two diagonal braces 42 are connected to each other, and the bottom ends of the two diagonal braces 42 are connected to the bottom ends of the front and rear U-shaped frames 21 respectively. The top end of the vertical rod 41 is connected to the connection point of the top ends of the two diagonal braces 42, and the bottom end of the vertical rod 41 is slidably connected to the bottom folding frame 2 3.
[0034] Furthermore, the middle part of the bottom folding frame 3 is a pivot 31, and a guide groove 43 is provided on the vertical rod 41. The pivot 31 is located in the guide groove 43 and can move within the guide groove 43.
[0035] A U-shaped side frame 5 is provided between the side folding support frame 4 and the two front and rear U-shaped frames 21, and the two U-shaped side frames 5 are respectively engaged with the two front and rear U-shaped frames 21.
[0036] Furthermore, the inner ends of the two U-shaped side frames 5 are all axially connected to the side folding support frame 4. Preferably, the inner ends of the two U-shaped side frames 5 are all axially connected to the shaft joints at the top of the two diagonal braces 42. Sliding sleeves 52 are provided on the two U-shaped frames 21, and the sliding sleeves 52 are slidably connected to the U-shaped frames 21. The outer ends of the U-shaped side frames 5 are gripped and connected to the sliding sleeves 52. Buckles 51 are provided on the sliding sleeves 52, and the two U-shaped side frames 5 are engaged with the buckles 51.
[0037] When the trolley is in the unfolded state, the two U-shaped side frames 5 are locked onto the buckles 51. When it needs to be folded, the U-shaped side frames 5 are disengaged from the buckles 51.
[0038] The upper and lower ends of the support rod 22 are respectively provided with a first limiting member 6 and a second limiting member 7 for restricting the movement of the U-shaped frame 21. The U-shaped frame 21 is provided with an unlocking key 8 that is adapted to the first limiting member 6 / second limiting member 7. The unlocking key 8 is used to push the first limiting member 6 / second limiting member 7 to move so that the limiting member is released from the U-shaped frame 21.
[0039] Furthermore, a connecting sleeve 81 is provided at the bottom of the U-shaped frame 21, and the unlocking button 8 is rotatably connected to the connecting sleeve 81. Pressing the unlocking button 8 will push the first limiting member 6 / second limiting member 7 to move.
[0040] The first limiting member 6 and the second limiting member 7 have the same structure, which is a push rod. One end of the push rod extends out of the support rod 22, and a return spring (not shown in the figure) is provided between the other end of the push rod and the inner wall of the support rod 22. The return spring always applies a force to the push rod extending out of the side wall of the support rod 22.
[0041] The outer wall of the U-shaped frame 21 is provided with a positioning hole 23. When the U-shaped frame 21 is moved, the positioning hole 23 is moved to the position of the first limiting member 6 / second limiting member 7. The first limiting member 6 / second limiting member 7 is inserted into the positioning hole 23, and the U-shaped frame 21 will be fixed in the current position. Just press the unlock button 8 to push the first limiting member 6 / second limiting member 7 into the support rod 22. That is, the first limiting member 6 / second limiting member 7 is disengaged from the positioning hole, and the U-shaped frame 21 can be unlocked and moved up and down.
[0042] In the first state, the U-shaped frame 21 overlaps with the support rod 22, the U-shaped frame 21 is locked on the second limiting member 7, the bottom folding frame 23 and the bottom folding frame 1 approach each other, at this time the trolley is in a single-layer state, the U-shaped frame 21 is completely fitted on the support rod 22 and its bottom abuts against the second limiting member 7.
[0043] In the second state, the U-shaped frame 21 moves upward, and the bottom folding frame 2 3 and the bottom folding frame 1 gradually separate and form the bottom cavity 9 until the U-shaped frame 21 is on the first limiting member 6. At this time, the trolley is in a double-layer state.
[0044] like Figure 1 As shown, the trolley is in an unfolded, single-layer state. To fold it, first disengage the two U-shaped side frames 5 from the buckles 51. Simultaneously, the user applies force from both the front and rear sides of the trolley. At this time, the middle section of the bottom folding frame 1 folds, and the middle section of the bottom folding frame 2 folds as well. During the folding process, the pivot 31 of the bottom folding frame 2 3 gradually moves from the bottom end of the guide groove 43 to the top end, the two diagonal support rods 42 gradually approach each other, and the sliding sleeve 52 slides downwards, causing the two U-shaped side frames 5 to gradually approach each other as well, thus completing the folding process, resulting in the trolley appearing as shown. Figure 3 The state shown.
[0045] When unfolding is required, press down on the pivot 31. The pivot 31 gradually moves from the top of the guide groove 43 to the bottom of the guide groove 43. At the same time, the bottom folding frame 1 and the bottom folding frame 2 unfold, the two diagonal support rods 42 rotate and gradually open, the sliding sleeve 52 moves upward, driving the two U-shaped side frames 5 to open. Finally, snap the two U-shaped side frames 5 back onto the buckle 51 to complete the unfolding process, returning to the starting position. Figure 1 The state shown.
[0046] When switching to double-layer mode, press the unlock button 8 to push the second limiting member 7 inward, causing it to disengage from the positioning hole 23. Pull the U-shaped frame 21 upward until the positioning hole 23 reaches the position of the first limiting member 6. The first limiting member 6, under the action of the return spring, pushes into the positioning hole 23, thus locking the U-shaped frame 21. The trolley then switches to double-layer mode, as shown in the image. Figure 4 The state shown.
[0047] When switching back to single-layer mode, press the unlock button 8 to push the first limiting member 6 to move out of the positioning hole 23. The U-shaped frame 21 can then move downwards until the positioning hole 23 moves to the position of the second limiting member 7. Under the action of the return spring, the second limiting member 7 engages in the positioning hole 23, thus returning to the single-layer state. Figure 1 The single-layer trolley configuration is shown.
[0048] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0049] The single / double-layer switchable folding trolley provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.
Claims
1. A folding stroller that can switch between single and double layers, characterized in that: It includes a bottom folding frame one and two sets of support frames located at the front and rear ends of the bottom folding frame one, respectively. Between the two sets of support frames, there is a bottom folding frame two and two sets of side folding support frames arranged symmetrically on the left and right. The two sets of support frames have the same structure, including a U-shaped frame and two support rods. The bottom end of the support rod is fixedly connected to the bottom folding frame one. The two ends of the U-shaped frame are respectively connected to the two support rods and slidably connected with them. The upper and lower ends of the support rods are respectively provided with a first limiting member and a second limiting member for restricting the movement of the U-shaped frame. In the first state, the U-shaped frame overlaps with the support rod, the U-shaped frame is locked on the second limiting member, and the bottom folding frame two and the bottom folding frame one approach each other. At this time, the trolley is in a single-layer state. In the second state, the U-shaped frame moves upward, and the second bottom folding frame gradually separates from the first bottom folding frame to form a bottom cavity until the U-shaped frame is stuck on the first limiting piece. At this time, the trolley is in a double-layer state.
2. The folding trolley with switchable single / double layers according to claim 1, characterized in that: The two ends of the U-shaped frame are respectively fitted onto two support rods. In the first state, the U-shaped frame is completely fitted onto the support rods and its bottom abuts against the second limiting member.
3. The folding trolley with single / double layer switchable design according to claim 1, characterized in that: The U-shaped frame is provided with an unlocking key that is compatible with the first limiting member / second limiting member. The unlocking key is used to push the first limiting member / second limiting member to move so that the limiting member is released from the U-shaped frame.
4. The folding trolley with switchable single / double layers according to claim 3, characterized in that: The bottom of the U-shaped frame is provided with a connecting sleeve, and the unlocking button is rotatably connected to the connecting sleeve. Pressing the unlocking button will push the first limiting member / second limiting member to move.
5. The folding trolley with single / double layer switchable design according to claim 1, characterized in that: The first limiting member and the second limiting member have the same structure, which is a push rod. One end of the push rod extends out of the support rod, and a return spring is provided between the other end of the push rod and the inner wall of the support rod.
6. The folding trolley with single / double layer switchable design according to claim 1, characterized in that: The outer wall of the U-shaped frame is provided with a positioning hole. When the U-shaped frame is moved, the positioning hole is moved to the position of the first limiting member / second limiting member, and the first limiting member / second limiting member is inserted into the positioning hole.
7. The folding trolley with single / double layer switchable design according to claim 1, characterized in that: The side folding support frame includes a vertical rod and two diagonal braces. The top ends of the two diagonal braces are connected to each other, and the bottom ends of the two diagonal braces are connected to the bottom ends of the front and rear U-shaped frames respectively. The top end of the vertical rod is connected to the connection point of the top ends of the two diagonal braces, and the bottom end of the vertical rod is slidably connected to the bottom folding frame.
8. The folding trolley with single / double layer switchable design according to claim 7, characterized in that: The middle part of the bottom folding frame 2 is a pivot, and a guide groove is provided on the vertical rod. The pivot is located in the guide groove and can move within the guide groove.
9. The folding trolley with single / double layer switchable design according to claim 1, characterized in that: The side folding support frame is provided with a U-shaped side frame between it and the front and rear U-shaped frames. The two U-shaped side frames are respectively engaged with the front and rear U-shaped frames.
10. The folding trolley with single / double layer switchable design according to claim 9, characterized in that: The inner ends of the two U-shaped side frames are axially connected to the side folding support frame, and each of the two U-shaped frames is provided with a buckle, which engages with the buckle.