Folding supporting mechanism of flatbed cart

Abstract

The utility model discloses a folding supporting mechanism of a flatbed cart. The folding supporting mechanism comprises a bottom plate; the roller carriers are rotationally arranged on the two sides of the bottom of the bottom plate; the supporting frame is rotationally arranged on one side of the bottom of the bottom plate, and a locking device and an unlocking device are arranged in the supporting frame; the roller carriers can be converted to be in a folded state and a using state through rotation, the supporting frame can be in matched abutting connection with the roller carriers through rotation in the using state to limit rotation of the roller carriers, the supporting frame can be fixed between the two roller carriers through the locking device, the locking device is unlocked through the unlocking device, and the roller carriers can be folded through the unlocking device. And the roller carrier and the support frame enter a folded state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of folding trailers, in particular to a folding support mechanism of a flat cart. BACKGROUND

[0002] The handcart is a kind of small cart for conveniently transporting a small amount of goods in a short distance, and has been increasingly popular in our life. Especially, leisure, tourism, shopping, delivery, loading and unloading goods and taking care of children cannot be separated from these products. They indeed provide us with more convenience, but when heavy objects need to be carried, it is more labor-saving and convenient to pull the cart. The existing handcart cannot realize free switching between pushing and pulling, and its structure cannot realize maximum folding, which is not convenient for storage and carrying, has poor environmental adaptability, occupies a large area during non-working time, and occupies a lot of space.

[0003] The folding push-pull loading tool proposed by the applicant in the application number CN202321897581.4 is a kind of folding trailer. This kind of trailer often uses a thin pin to complete the guiding and supporting when the wheels are unfolded. However, this supporting method is easy to be damaged under great pressure during use. Therefore, how to solve the above problems is the purpose of the present application.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not mean to admit that the above content is the closest prior art to the present application. SUMMARY

[0005] Based on this, the present application provides a folding support mechanism of a flat cart to solve one of the above technical problems.

[0006] The technical solution adopted by the present application to solve the technical problems is a folding support mechanism of a flat cart, comprising: a bottom plate; a roller frame rotatably arranged on both sides of the bottom plate; a support frame rotatably arranged on one side of the bottom plate, the inside of the support frame being provided with a locking device and an unlocking device; the roller frame can be converted to a folded state and a use state by rotating, the support frame can be abutted with the roller frame by rotating in the use state to limit the rotation of the roller frame, the support frame can be fixed between the two roller frames by the locking device, and the locking device is unlocked by the unlocking device to make the roller frame and the support frame enter the folded state.

[0007] In some embodiments, the two roller frames can only rotate towards each other, and a locking hole is formed in the roller frame for cooperation with the locking device.

[0008] In some embodiments, the locking device comprises two locking blocks and an elastic component, one end of the locking block is provided with a locking part capable of penetrating through the support frame and cooperating with the locking hole, and the elastic component is arranged between the two locking blocks to provide a force always driving the locking block to the two sides of the support frame.

[0009] In some embodiments, the top of the locking block is provided with a plurality of movable grooves, and the support frame is provided with a plurality of limiting bolts corresponding to the number of movable grooves, the limiting bolts penetrating through the movable grooves to limit the movement of the locking block.

[0010] In some embodiments, the unlocking device comprises a rotating rod, and an unlocking column is arranged on the rotating rod.

[0011] In some embodiments, the bottom of the end of the locking block cooperating with the elastic component is provided with an oblique unlocking part, and the unlocking column can cooperate with the oblique unlocking part to drive the locking block.

[0012] In some embodiments, a part of the outer edge of the locking hole is extended and formed with a first step, and the two sides of the support frame cooperating with the locking hole are provided with a second step cooperating with the first step.

[0013] In some embodiments, the rotating hinge points of the roller frame and the support frame are each provided with a torsion spring.

[0014] The beneficial effects of the present application are as follows: specifically, the support frame is used to support the roller frame in use, so that the support frame can provide a larger supporting force to reduce the possibility of damage to the support frame, and the unlocking device is arranged to cooperate with the locking device to achieve quick unlocking. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 is a schematic diagram of the use state of the present application.

[0017] Figure 2 is a schematic diagram of the structure of the use state of the present application.

[0018] Figure 3 is a schematic diagram of the structure of the folding state of the present application.

[0019] Figure 4 is a schematic diagram of the structure of the roller frame of the present application.

[0020] Figure 5 is a schematic view of a support frame structure of the present application.

[0021] Figure 6 is a schematic view of an internal structure of a support frame of the present application.

[0022] Figure 7 is a schematic view of a lock block structure of the present application.

[0023] Figure 8 is a schematic view of an unlocking device structure of the present application.

[0024] Brief Description of the Drawings: 1, bottom plate; 2, roller frame; 21, locking hole; 22, first step; 3, support frame; 31, locking device; 311, lock block; 3111, locking portion; 3112, oblique unlocking portion; 3113, movable slot; 312, elastic member; 32, unlocking device; 321, rotating rod; 322, unlocking column; 33, limiting bolt; 34, second step. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application. In addition, the technical solutions in each embodiment can be combined with each other, but it must be based on that a person of ordinary skill in the art can realize, when the combination of the technical solutions appears contradictory or unachievable, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present application.

[0026] In the embodiments of the present application, please refer to Figures 1-8 It is shown that the present application provides a folding support mechanism of a flat cart, mainly comprising: a bottom plate 1; a roller frame 2, the roller frame 2 is rotationally arranged on both sides of the bottom of the bottom plate 1; a support frame 3, the support frame 3 is rotationally arranged on one side of the bottom of the bottom plate 1, the inside of the support frame 3 is provided with a locking device 31 and an unlocking device 32; the roller frame 2 can be converted to a folding state and a use state by rotating, the support frame 3 can be abutted with the roller frame 2 by rotating in the use state, so that the roller frame 2 will not rotate, the support frame 3 can be fixed between the two roller frames 2 by the locking device 31, the locking device 31 is unlocked by the unlocking device 32, so that the roller frame 2 and the support frame 3 enter the folding state.

[0027] Specifically, in the folded state, the roller frames 2 are folded towards the center of the bottom plate 1 and abut against the upper side of the support frame 3. When it is required to convert the roller frames 2 and the support frame 3 to the use state, the roller frames 2 on both sides are first rotated, and then the support frame 3 is rotated. The support frame 3 can be automatically locked by the locking device 31, and the support frame 3 is located between the two roller frames 2, which can effectively fix the state of the roller frames 2.

[0028] Some preferred / modified embodiments based on the above embodiments will be further described below. Any one or a plurality of the following embodiments can be selected and combined.

[0029] Referring to Figure 4 As shown, the two roller frames 2 can only be rotated towards each other. Locking holes 21 are formed in the roller frames 2 for cooperation with the locking device 31. In this way, the locking device 31 can be provided with locking connection cooperation in the use state.

[0030] Referring to Figure 6 As shown, the locking device 31 includes two locking blocks 311 and an elastic member 312. One end of the locking block 311 is provided with a locking portion 3111 which can pass through the support frame 3 and cooperate with the locking hole 21. The elastic member 312 is arranged between the two locking blocks 311 to provide a force for driving the locking blocks 311 towards the two sides of the support frame 3 at all times. Specifically, under the action of the elastic member 312, the locking portion 3111 can be retracted inwardly during rotation and automatically clamped into the locking hole 21 after rotation is completed, thereby achieving fixation in the use state.

[0031] As a preference, in order to limit the movement of the locking block 311 and prevent the elastic member 312 from being detached, a plurality of movable grooves 3113 are formed in the top of the locking block 311. A plurality of limiting bolts 33 corresponding to the number of movable grooves 3113 are arranged on the support frame 3. The limiting bolts 33 pass through the movable grooves 3113 to limit the movement of the locking block 311.

[0032] Referring to Figure 8 As shown, the unlocking device 32 includes a rotating rod 321, and an unlocking column 322 is arranged on the rotating rod 321. The bottom of the end of the locking block 311 cooperating with the elastic member 312 is provided with an inclined unlocking portion 3112. The unlocking column 322 can cooperate with the inclined unlocking portion 3112 to drive the locking block 311. In this way, the unlocking device 32 can move the unlocking column 322 towards the locking block 311 during rotation and drive the two locking blocks 311 to move towards the center at the same time.

[0033] Referring to Figure 2As shown, a part of the outer edge of the locking hole 21 extends and is formed with a first step 22, and the two sides of the support frame 3 matched with the locking hole 21 are provided with a second step 34 matched with the first step 22, and the limiting clamping of the first step 22 and the second step 34 can limit the maximum rotating range of the support frame 3, and can make the support frame 3 be immediately locked when rotating to the maximum range.

[0034] As preferred, the rotating hinge points of the roller frame 2 and the support frame 3 are all provided with torsion springs, and the torsion springs of the roller frame 2 and the support frame 3 can drive them to drive to the folding state, so that the user can quickly convert to the folding state after starting the unlocking device 32.

[0035] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and the foregoing embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A folding support mechanism for a stroller, comprising: Include: The bottom plate; Roller frame, the roller frame is rotationally arranged at the bottom of the bottom plate, the roller frame is provided with a locking hole; Support frame, the support frame is rotationally arranged at the bottom of the bottom plate, the inside of the support frame is provided with locking device and unlocking device; The locking device includes two lock blocks, one end of the lock block is provided with a locking part, the locking part can pass through the support frame and cooperate with the locking hole, The locking device further includes a spring part, one end of the lock block is provided with a locking part, the locking part can pass through the support frame and cooperate with the locking hole, the spring part is arranged between the two lock blocks to provide the force that the lock block always drives to the both sides of the support frame; The roller frame can be converted to the folding state and the use state by rotating, the support frame can be abutted with the roller frame by rotating in the use state, so that the roller frame cannot rotate, the support frame can be fixed between the two roller frames by the locking device, and the locking device is unlocked by the unlocking device, so that the roller frame and the support frame enter the folding state.

2. The folding support mechanism of a flat cart according to claim 1, wherein, Two roller frames can only be rotated oppositely, and are used to cooperate with the locking device.

3. The folding support mechanism for a flat cart of claim 1, wherein, The top of the lock block is provided with a plurality of movable grooves, the support frame is provided with a plurality of limiting bolts corresponding to the movable grooves, and the limiting bolts pass through the movable grooves to limit the movement of the lock block.

4. The folding support mechanism for a flat cart of claim 1, wherein, The unlocking device includes a rotating rod, and an unlocking column is arranged on the rotating rod.

5. A folding support mechanism for a flat cart according to claim 4, wherein, The bottom of one end of the lock block and the spring part is provided with an inclined unlocking part, and the unlocking column can cooperate with the inclined unlocking part to drive the lock block.

6. The folding support mechanism for a flat cart of claim 1, wherein, A part of the outer edge of the locking hole extends and forms a first step, and the two sides of the support frame cooperating with the locking hole are provided with a second step cooperating with the first step.

7. The folding support mechanism for a flat cart of claim 1, wherein, The rotation hinge points of the roller frame and the support frame are provided with torsion springs.

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