Multifunctional convenient cart

Abstract

The utility model relates to the field of carts, disclose a multifunctional convenient cart, including main frame body, the outside lateral wall of main frame body is hinged with the riding board, the bottom of riding board is hinged with the reinforcing frame, the outside lateral wall of reinforcing frame is hinged with the auxiliary rod, both sides lateral wall of riding board all are hinged with the connecting rod a, the inside lateral wall of main frame body top is hinged with the table board, the inside lateral wall of main frame body is provided with two -way linkage unfolding mechanism. In the utility model, through the gear and rack and slide rod cooperation transmission of two -way linkage unfolding mechanism, realize the synchronous unfolding / storage of riding board and table board: when the table board is broken, the connecting rod b drags the slide rod a and drives the rack b to move, the rack b engages the gear and drives the rack a and the slide rod b reverse movement, the slide rod b through the connecting rod a synchronous push riding board unfolds, simultaneously, the hinged point of riding board and table board all has the damping characteristic, can be fixed in the arbitrary position of unfolding / storage.

Description

Technical Field

[0001] This utility model relates to the field of cart pulling, and in particular to a multifunctional and convenient cart pulling device. Background Technology

[0002] As a common tool for daily short-distance transportation and moving goods, trolleys are widely used in scenarios such as family grocery shopping, students carrying goods to school, and outdoor portable storage. Their core requirement is to be adaptable to diverse usage scenarios while ensuring "convenient mobility".

[0003] First, traditional trolleys suffer from limited functionality and poor adaptability to various scenarios. Their core functions are storage and mobility, allowing only for loading and short-distance transport, failing to meet diverse usage needs. For example, when families go grocery shopping, users are prone to fatigue from carrying heavy items for extended periods, yet there is a lack of temporary seating or rest areas. When students use them to go to school, trolleys can only carry books and cannot provide a table for writing or placing items. When traveling outdoors, additional accessories such as folding chairs and small tables are required, increasing the burden. Furthermore, while some "multi-functional" trolleys may include seating or tabletop structures, these are often independent add-ons that require separate installation and disassembly, exhibiting poor compatibility with the main trolley and prone to wobbling and instability. Therefore, a multi-functional and convenient trolley is proposed to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a multifunctional and convenient trolley, which aims to improve the problems of limited functionality and poor adaptability to various scenarios in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multifunctional and convenient trolley, comprising a main frame, a seating board hinged to the outer side wall of the main frame, a reinforcing frame hinged to the bottom end of the seating board, an auxiliary rod hinged to the outer side wall of the reinforcing frame, connecting rods a hinged to both side walls of the seating board, a table hinged to the inner side wall of the top of the main frame, a connecting rod b hinged to the outer side wall of the table, and a bidirectional linkage unfolding mechanism provided on the inner side wall of the main frame;

[0006] The bidirectional linkage unfolding mechanism includes a connecting block. A guide groove is provided on the side wall of the main frame. A slide rod a is slidably connected through the inner wall of the upper end of the guide groove of the main frame. A slide rod b is slidably connected through the inner wall of the lower end of the guide groove of the main frame. A gear is rotatably connected to the inner side wall of the connecting block. A rack a is meshed on the left side surface of the gear. A rack b is meshed on the right side surface of the gear. An extension plate assembly is provided on the inner side wall of the table.

[0007] As a further description of the above technical solution:

[0008] A support plate is fixedly connected to the inner side wall at the bottom of the main frame. A storage bag is provided on the surface of the support plate. A support frame is fixedly connected to the bottom of the support plate. Moving wheels are rotatably connected to both sides at the bottom of the main frame. The extension plate assembly includes an extension plate. A limit ball is elastically connected to the inner wall at the top of the extension plate through a return spring.

[0009] As a further description of the above technical solution:

[0010] The auxiliary rod is hinged at the end away from the reinforcing frame to the outer sidewall of the bottom of the main frame, and the support frame is fixedly connected at the end away from the support plate to the inner sidewall of the bottom of the main frame.

[0011] As a further description of the above technical solution:

[0012] The slide bar a and the connecting block consist of two sets of sliders and one set of rods. The end of the connecting rod b away from the table is hinged to the surface of the slide bar a.

[0013] As a further description of the above technical solution:

[0014] The slide bar a and the connecting block consist of two sets of sliders and one set of rods. The end of the connecting rod b away from the table is hinged to the outer side wall of the slide bar a.

[0015] As a further description of the above technical solution:

[0016] The rack b is fixedly connected to the side wall of the slider a, and the rack a is fixedly connected to the side wall of the slider end of the slider b.

[0017] As a further description of the above technical solution:

[0018] The rack a is slidably connected to the inner side wall of the main frame, and the rack b is slidably connected to the inner side wall of the main frame.

[0019] As a further description of the above technical solution:

[0020] One end of the reset spring is fixedly connected to the bottom end of the outer wall of the limiting ball, and the other end of the reset spring is fixedly connected to the bottom end of the inner wall of the extension plate. The limiting ball is slidably connected to the bottom end of the inner wall of the extension plate, and the extension plate is slidably connected to the inner side wall of the bottom end of the table. A ball groove is provided at the bottom end of the inner wall of the table. The outer wall of the top of the limiting ball is in contact with the inner wall of the ball groove.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the synchronous unfolding / folding of the seating board and the table is achieved through the gear-rack-slide rod coordinated transmission of the bidirectional linkage unfolding mechanism: when the table is turned, the connecting rod b pulls the slide rod a to drive the rack b to move. The rack b meshes with the gear to drive the rack a and the slide rod b to move in opposite directions. The slide rod b pushes the seating board to unfold synchronously through the connecting rod a. At the same time, the hinge points of the seating board and the table are equipped with damping characteristics and can be fixed at any position during unfolding / folding without the need for additional locking parts, which greatly reduces the usage threshold for the elderly, students and other groups.

[0023] 2. In this utility model, the tabletop can not only place books and sundries, but its inner extension plate assembly can also achieve flexible adjustment of the tabletop length through the cooperation of the limiting ball and the return spring, adapting to scenarios such as students writing, temporarily placing items when shopping. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a multifunctional and convenient trolley proposed in this utility model;

[0025] Figure 2 This is a side view of the overall structure of a multifunctional and convenient trolley proposed in this utility model;

[0026] Figure 3 This is a partial cross-sectional view of the main frame structure of a multifunctional and convenient trolley proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the extended plate and table of a multifunctional and convenient trolley in the sliding unfolded state proposed in this utility model.

[0028] Figure 5 This is a partial cross-sectional view of the table and extension plate of a multifunctional and convenient trolley proposed in this utility model.

[0029] Legend:

[0030] 1. Main frame; 2. Support plate; 3. Casters; 4. Support frame; 5. Storage bag; 6. Two-way linkage unfolding mechanism; 61. Slide rod a; 62. Connecting block; 63. Slide rod b; 64. Rack a; 65. Rack b; 66. Gear; 7. Seating plate; 8. Link a; 9. Reinforcing frame; 10. Auxiliary rod; 11. Link b; 12. Tabletop; 13. Extension plate assembly; 131. Extension plate; 132. Return spring; 133. Limit ball. Detailed Implementation

[0031] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a multifunctional and convenient trolley, including a main frame 1. A support plate 2 is fixedly connected to the inner side wall of the bottom end of the main frame 1. A storage bag 5 is provided on the surface of the support plate 2. A support frame 4 is fixedly connected to the bottom end of the support plate 2. The end of the support frame 4 away from the support plate 2 is fixedly connected to the inner side wall of the bottom end of the main frame 1. By providing the support frame 4, the support plate 2 can be strengthened and supported, and a stable ground support can be provided when the whole is not moving. The two sides of the bottom end of the main frame 1 are rotatably connected to the moving wheels 3. A seating plate 7 is hinged to the outer side wall of the main frame 1. The hinge between the seating plate 7 and the main frame 1 has damping, so that it can be fixed in both the open and closed positions. A reinforcing frame 9 is hinged to the bottom end of the seating plate 7. An auxiliary rod 10 is hinged to the outer side wall of the reinforcing frame 9. The end of the auxiliary rod 10 away from the reinforcing frame 9 is hinged to the outer side wall at the bottom of the main frame 1. When the seating board 7 is opened, the length of the auxiliary rod 10 is fixed, which will push the reinforcing frame 9 to rotate around the hinge point of the seating board 7, thereby supporting the ground and providing support for the seating board 7. Both sides of the seating board 7 are hinged with connecting rods a8. The inner side wall at the top of the main frame 1 is hinged with a table 12. The hinge between the table 12 and the main frame 1 is damped, so that the table 12 can be fixed in multiple positions during rotation, opening and closing. At the same time, the surface of the table 12 is provided with grooves, so that the whole can be pulled through the grooves when folding and closing. The outer side wall of the table 12 is hinged with a connecting rod b11. The inner side wall of the main frame 1 is provided with a two-way linkage unfolding mechanism 6.

[0033] Reference Figure 2 and Figure 3The bidirectional linkage unfolding mechanism 6 includes a connecting block 62. A guide groove is provided on the side wall of the main frame 1. A sliding rod a61 is slidably connected through the inner wall of the upper end of the guide groove of the main frame 1. The sliding rod a61 and the connecting block 62 consist of two sets of sliders and one set of rods. The end of the connecting rod b11 away from the tabletop 12 is hinged to the outer side wall of the sliding rod a61. A sliding rod b63 is slidably connected through the inner wall of the lower end of the guide groove of the main frame 1. By providing a through guide groove on the surface of the main frame 1, the sliding rod a61 can be... The sliding rod b63 moves up and down to guide the position of the sliding rod. The end of the connecting rod a8 away from the seat plate 7 is hinged to the outer side wall of the sliding rod b63. ​​As the sliding rods a61 and b63 move away from each other in sync, the connecting rods a8 and b11 hinged to their surfaces can be driven to push the seat plate 7 and connecting rod b11 to unfold. This makes it convenient for daily grocery shopping and students going to school, providing a comfortable place to sit and rest. At the same time, the unfolding of the table 12 makes it convenient to place books and other daily necessities on its surface.

[0034] Reference Figure 2 and Figure 3 The connecting block 62 is fixedly connected to the center of the inner wall of the guide groove of the main frame 1. A gear 66 is rotatably connected to the inner side wall of the connecting block 62. The connecting block 62 provides rotational support for the gear 66. A rack a64 meshes with the left side surface of the gear 66, and a rack b65 meshes with the right side surface of the gear 66. The rack b65 is fixedly connected to the side wall of the slider of the slide rod a61, and the rack a64 is fixedly connected to the side wall of the slider end of the slide rod b63. ​​The rack a64 is slidably connected to the inner side wall of the main frame 1. The rack b65 is slidably connected to the inner side wall of the main frame 1. When the table 12 is opened by prying it, it will drive the connecting rod b11 to move, which will pull the sliding rod a61 to move, so that the rack b65 moves synchronously with it, thereby engaging the gear 66 to make the gear 66 rotate, and engaging the rack a64 to drive the sliding rod b63 to move synchronously, so that they move away from each other, so that when the table 12 is opened, it will drive the seating board 7 to unfold synchronously. The inner side wall of the table 12 is provided with an extension plate assembly 13.

[0035] Reference Figure 1 , Figure 4 and Figure 5The extension plate assembly 13 includes an extension plate 131. A limiting ball 133 is elastically connected to the inner wall of the top end of the extension plate 131 via a return spring 132. One end of the return spring 132 is fixedly connected to the bottom end of the outer wall of the limiting ball 133, and the other end is fixedly connected to the bottom end of the inner wall of the extension plate 131. The function of the return spring 132 is to automatically reset the position of the spherical surface of the limiting ball 133 after it has been moved by the pressure of the inner wall of the ball groove on the tabletop 12. The limiting ball 133 is slidably connected to the inner wall of the extension plate 131. At the bottom, a vertical groove is provided on the inner wall of the extension plate 131, allowing the limiting ball 133 to move vertically up and down in a straight line on the inner wall of the extension plate 131. The extension plate 131 is slidably connected to the inner side wall of the bottom of the tabletop 12. A ball groove is provided at the bottom of the inner wall of the tabletop 12. The outer wall of the top of the limiting ball 133 contacts the inner wall of the ball groove. The contact between the two can fix the extension plate 131 at multiple positions after the tabletop 12 is diffracted, so that the placement space of the tabletop 12 can be extended according to the living needs of students or users.

[0036] Working principle: The main frame 1 serves as the core load-bearing structure. The support plate 2 on the inner side of its bottom end is reinforced by the support frame 4. The storage bag 5 on the surface of the support plate 2 can be used to store items. The moving wheels 3 on both sides of the bottom end of the main frame 1 enable the overall movement function. When not moving, the support frame 4 provides stable ground support. When the seating and tabletop functions need to be deployed, synchronous operation is achieved through the bidirectional linkage deployment mechanism 6: the table 12, which is hinged to the inner side of the top of the main frame 1, is moved. The table 12 drives the connecting rod b11, which is hinged to the outer side wall, to move. The connecting rod b11 pulls the sliding rod a61, which slides in the guide groove of the main frame 1, to move upward. The slider end of the sliding rod a61 drives the fixedly connected rack b65 to move upward synchronously. The rack b65 meshes with the gear 66, which rotates inside the connecting block 62, driving the gear 66 to rotate. At the same time, the gear 66 meshes with the rack a64, driving the rack a64 and the fixedly connected sliding rod b63 to move downward along the guide groove of the main frame 1. The sliding rod b63 pushes the seating board 7 (with damping at the hinge point), which is hinged to the outer side of the main frame 1, to unfold outward through the hinged connecting rod a8, thus realizing the synchronous linkage deployment of the table 12 and the seating board 7.

[0037] During the unfolding of the seating platform 7, the reinforcing frame 9, hinged at its bottom, rotates around the hinge point under the push of the auxiliary rod 10, eventually contacting the ground to provide stable support for the seating platform 7 and ensure riding safety. After the tabletop 12 is unfolded, if it is necessary to expand the usable space, it can be operated through the extension plate assembly 13: pull the extension plate 131 that is slidably connected to the inner side of the tabletop 12. The limiting ball 133 on the inner wall of the top of the extension plate 131 is squeezed downward by the ball groove on the inner wall of the tabletop 12, breaking away from the current ball groove constraint. When it extends to the required length, the limiting ball 133 bounces into the corresponding ball groove under the action of the return spring 132, thus fixing the position of the extension plate 131 and expanding the usable area of ​​the tabletop. When folding up, the tabletop 12 is operated in reverse. The bidirectional linkage unfolding mechanism 6 drives the slide bar a61 to move down and the slide bar b63 to move up, so that the tabletop 12 and the seating platform 7 are stored synchronously. The reinforcing frame 9 and the auxiliary rod 10 are folded, and the whole thing returns to a compact state, taking into account both multi-functional use and convenient carrying needs.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multifunctional and convenient trolley, comprising a main frame (1), characterized in that: The outer sidewall of the main frame (1) is hinged with a seating board (7), the bottom end of the seating board (7) is hinged with a reinforcing frame (9), the outer sidewall of the reinforcing frame (9) is hinged with an auxiliary rod (10), both sides of the seating board (7) are hinged with connecting rods a (8), the inner sidewall of the top of the main frame (1) is hinged with a table (12), the outer sidewall of the table (12) is hinged with a connecting rod b (11), and the inner sidewall of the main frame (1) is provided with a bidirectional linkage unfolding mechanism (6). The bidirectional linkage unfolding mechanism (6) includes a connecting block (62). The side wall of the main frame (1) is provided with a guide groove. The inner wall of the upper end of the guide groove of the main frame (1) is slidably connected with a slide rod a (61). The inner wall of the lower end of the guide groove of the main frame (1) is slidably connected with a slide rod b (63). The inner side wall of the connecting block (62) is rotatably connected with a gear (66). The left side surface of the gear (66) is meshed with a rack a (64). The right side surface of the gear (66) is meshed with a rack b (65). The inner side wall of the table (12) is provided with an extension plate assembly (13).

2. The multifunctional and convenient trolley according to claim 1, characterized in that: A support plate (2) is fixedly connected to the inner side wall at the bottom of the main frame (1). A storage bag (5) is provided on the surface of the support plate (2). A support frame (4) is fixedly connected to the bottom of the support plate (2). Moving wheels (3) are rotatably connected to both sides at the bottom of the main frame (1). The extension plate assembly (13) includes an extension plate (131). The inner wall at the top of the extension plate (131) is elastically connected to a limit ball (133) through a return spring (132).

3. The multifunctional and convenient trolley according to claim 2, characterized in that: The auxiliary rod (10) is hinged at one end away from the reinforcing frame (9) to the outer side wall at the bottom of the main frame (1), and the support frame (4) is fixedly connected at one end away from the support plate (2) to the inner side wall at the bottom of the main frame (1).

4. A multifunctional and convenient trolley according to claim 2, characterized in that: The slide bar a (61) and the connecting block (62) consist of two sets of sliders and one set of rods. The end of the connecting rod b (11) away from the table (12) is hinged to the outer side wall of the slide bar a (61).

5. A multifunctional and convenient trolley according to claim 1, characterized in that: The end of the connecting rod a (8) away from the seat plate (7) is hinged to the outer side wall of the slide rod b (63), and the connecting block (62) is fixedly connected to the center of the inner wall of the guide groove of the main frame (1).

6. A multifunctional and convenient trolley according to claim 1, characterized in that: The rack b (65) is fixedly connected to the side wall of the slider a (61), and the rack a (64) is fixedly connected to the side wall of the slider end of the slider b (63).

7. A multifunctional and convenient trolley according to claim 1, characterized in that: The rack a (64) is slidably connected to the inner side wall of the main frame (1), and the rack b (65) is slidably connected to the inner side wall of the main frame (1).

8. A multifunctional and convenient trolley according to claim 2, characterized in that: One end of the return spring (132) is fixedly connected to the bottom end of the outer wall of the limiting ball (133), and the other end of the return spring (132) is fixedly connected to the bottom end of the inner wall of the extension plate (131). The limiting ball (133) is slidably connected to the bottom end of the inner wall of the extension plate (131). The extension plate (131) is slidably connected to the inner side wall of the bottom end of the table (12). A ball groove is provided at the bottom end of the inner wall of the table (12). The outer wall of the top of the limiting ball (133) is in contact with the inner wall of the ball groove.

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