Capacity-increasing cart

Abstract

The utility model discloses a capacity-increasing cart which comprises four supporting pipes, rollers are arranged at the bottoms of the four supporting pipes, every two adjacent supporting pipes are connected through a side frame, and the lower ends of the four supporting pipes are connected through a bottom frame. The extension pipe is arranged in the supporting pipe, a through hole is formed in the pipe wall of the lower end of the extension pipe, a limiting hole is formed in the pipe wall of the top of the supporting pipe, and a marble installed in the extension pipe can stretch out of the through hole and the limiting hole. According to the capacity-increasing cart, the extension pipes are pulled out of the supporting pipes, the storage space of the cart is enlarged, and a user can flexibly adjust the capacity-increasing cart according to the number requirement of current transported articles.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of handcart, concretely relates to a capacity increasing handcart. BACKGROUND

[0002] The handcart is moved by manpower in daily life, and is mainly used in some environment where the motor vehicle cannot be used. The existing handcart has folding and non-folding design. The Chinese patent with the publication number CN221090947 U discloses a handcart, which comprises a vehicle body, a handle assembly arranged at the front end of the vehicle body, and a reset structure. The vehicle body comprises four support rods arranged at opposite angles. The vehicle body comprises a first folding frame and a second folding frame. The first folding frame is connected with two support rods arranged at the same side. The second folding frame is connected with two support rods arranged at the same end. The handcart can be folded, and the vehicle body can be folded and stored when no goods are transported. However, the size of the unfolded vehicle body is fixed, so that the space for placing goods is limited. When more goods are transported, more transportation is needed, and the user cannot adjust the space for carrying goods, so that the flexibility is poor. SUMMARY

[0003] The utility model aims at the defects of the prior art, and provides a capacity increasing handcart.

[0004] In order to realize the above object, the utility model adopts the following technical scheme: a capacity increasing handcart, which comprises four support pipes provided with rollers at the bottom, two adjacent support pipes are connected through a side frame, and the lower ends of the four support pipes are connected through a bottom frame. The utility model further comprises an extension pipe arranged in the support pipe, the lower end of the extension pipe is provided with a through hole in the pipe wall, the pipe wall of the top of the support pipe is provided with a limiting hole, and a ball arranged in the extension pipe can extend out of the through hole and the limiting hole.

[0005] Further, the ball is arranged on one side of a V-shaped or U-shaped spring sheet, and the spring sheet and the ball are arranged in the extension pipe and the ball extends out of the through hole.

[0006] Further, the utility model further comprises an upper fixing seat arranged at the top of the support pipe, and the lower end of the extension pipe extends into the support pipe through the mounting hole of the upper fixing seat; the upper fixing seat is provided with a button corresponding to the position of the limiting hole.

[0007] Further, the inner wall of the button is provided with a protruding part corresponding to the position of the ball.

[0008] Further, the top of the extension pipe is provided with a pipe plug, the lower edge of the pipe plug can be embedded into the mounting hole of the upper fixing seat, the upper fixing seat is provided with a protrusion matched with the pipe plug, and the protrusion is provided with a groove penetrating the mounting hole from top to bottom.

[0009] Further, the side frame comprises at least one X-shaped cross pipe, the X-shaped cross pipe comprises two movable riveted side pipes, the upper end of the side frame is movably riveted with the upper end of the support pipe, and the lower end of the side frame is movably connected with the support pipe in the longitudinal direction.

[0010] Further, the upper end of the side frame is movably riveted with the upper fixed seat, or the support pipe is slidably provided with a sliding block, and the lower end of the side frame is movably riveted with the sliding block.

[0011] Further, the bottom frame comprises a center seat and four bottom pipes movably riveted at four corners of the center seat, and the outer end of the bottom pipe is movably riveted with the lower fixed seat at the lower end of the support pipe.

[0012] Further, the bottom frame comprises a center seat and four bottom pipes movably riveted at four corners of the center seat, and the outer end of the bottom pipe is movably riveted with the lower fixed seat at the lower end of the support pipe.

[0013] Further, the pull rod further comprises an upper pipe provided with a handle at the top and a connecting seat, the upper pipe is movably connected with the connecting seat, and the left and right sides of the connecting seat are movably riveted with the two lower pipes.

[0014] By adopting the technical scheme of the utility model, the beneficial effects of the utility model are as follows: the capacity increasing cart expands the storage space of the cart by pulling out the extension pipe on the support pipe, locking the positions of the support pipe and the extension pipe through the through hole and the limiting hole of the elastic ball, and the user can flexibly adjust the capacity increasing cart according to the amount of transported goods; the capacity of the cart is quickly adjusted by pressing the key to drive the elastic ball to retract, and the extension pipe can be retracted into the support pipe after the locking state is released, so that the extension pipe does not occupy the external space after folding, and the side frame, the bottom frame and the pull rod can be folded and gathered, so that the whole cart has a small size after folding, and is convenient for storage and transportation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is a perspective view of the capacity increasing state of the capacity increasing cart.

[0016] Fig. 2 is a side view of the capacity increasing state of the capacity increasing cart.

[0017] Fig. 3 is a split view of the capacity increasing state of the capacity increasing cart.

[0018] In the drawing: 1 is a support pipe, 1a is a limiting hole, 2 is an extension pipe, 2a is a through hole, 3 is a side frame, 31 is a side pipe, 4 is a roller, 5 is a bottom frame, 51 is a center seat, 52 is a bottom pipe, 6 is an elastic ball, 7 is an elastic sheet, 8 is an upper fixed seat, 81 is a protrusion, 82 is a groove, 9 is a key, 10 is a pipe plug, 10a is a convex edge, 11 is a sliding block, 12 is a lower fixed seat, 13 is a pull rod, 131 is a handle, 132 is an upper pipe, 133 is a connecting seat, 134 is a lower pipe, and 134 is a connecting block. DETAILED DESCRIPTION

[0019] The utility model discloses further illustrate the concrete scheme concrete embodiment in combination with the drawings, make this technical scheme more clear, clear.

[0020] As Figs. 1-3 The utility model discloses a kind of capacity-increasing carts, including four bottom be equipped with supporting tube 1 of gyro wheel 4, between two adjacent supporting tubes 1 pass through one side frame 3 connection, four supporting tubes 1 lower end pass through one bottom frame 5 connection;It further includes the extension pipe 2 placed in supporting tube, the lower end pipe wall of the extension pipe 2 is open through hole 2a, the pipe wall of the top of supporting tube 1 is open limit hole 1a, the marble installed in the inside of extension pipe 2 can extend through hole 2a, limit hole 1a, with the lower end of extension pipe 2 is fixed on the upper end of supporting tube 1, both cannot move, the capacity of cart is maximum state;Marble is pressed inwards, marble moves inwards and separates from limit hole 1a, the lower end of extension pipe 2 and the upper end of supporting tube 1 are unlocked at this time, can slide into supporting tube 1, reduce the capacity of cart.

[0021] The marble 6 is located on one side of the V-shaped or U-shaped spring sheet 7, and the spring sheet 7 and the marble 6 are located in the extension pipe 2 and the marble 6 extends out of the through hole 2a. The spring sheet 7 and the marble 6 are integrally formed. The marble 6 is in the shape of a cylinder, and the outer end surface is in the shape of an arc.

[0022] It further includes an upper fixing seat 8 installed on the top of the supporting tube 1, and the lower end of the extension pipe 2 passes through the mounting hole of the upper fixing seat and is placed in the supporting tube 1. The upper fixing seat 8 is internally provided with a button 9 corresponding to the position of the limit hole. The button 9 extends out of the upper fixing seat 8. When the marble 6 at the bottom of the extension pipe 2 extends out of the limit hole after being pulled straight upward, the inner wall of the button 9 is in contact with the top of the marble 6. The user can directly unlock the state by pressing the button, and quickly adjust the load capacity of the cart.

[0023] The inner wall of the button 9 is provided with a protruding part. When the button 9 is pressed inward, the protruding part is in contact with the top of the marble 6, until the marble 6 is pressed and shrunk into the limit hole 1a. At this time, the extension pipe 2 can slide up and down relative to the supporting tube 1, and is accommodated in the supporting tube 1 when sliding down.

[0024] The top of the extension pipe 2 is provided with a pipe plug 10, the pipe plug 10 covers the top of the extension pipe 2 and is fixed by screws. The upper fixing seat 8 is provided with a protrusion 81 matched with the pipe plug 10. In the normal state, the extension pipe 2 is shrunk into the supporting tube 1, the convex edge at the lower end of the pipe plug 10 is embedded into the mounting hole of the upper fixing seat 8, and the protrusion 81 is provided with a groove 82 penetrating the mounting hole from top to bottom. When the capacity needs to be expanded, the convex edge at the lower end of the pipe plug 10 can be gripped by the fingers of the user through the groove 82 and pulled upward, driving the extension pipe 2 to slide upward and expose outside the supporting tube 1, until the marble 6 at the lower end passes through the limit hole 1a of the supporting tube 1.

[0025] The side frame 3 includes at least one X-shaped cross pipe, and the X-shaped cross pipe includes two movable riveted side pipes 31. The upper end of the side frame 3 is movably riveted to the upper end of the supporting tube 1, and the lower end is longitudinally slidably connected to the supporting tube 1.

[0026] In one embodiment, the upper end of the side frame 3 is movably riveted with the upper fixing seat 8.

[0027] In one embodiment, a sliding block 11 is slidably installed on the support tube 1, the sliding block 11 can slide up and down, and the lower end of the side frame 3 is movably riveted with the sliding block 11.

[0028] The bottom frame 5 comprises a center seat 51 and four bottom tubes 52 movably riveted at four corners of the center seat, and the outer end of the bottom tube 52 is movably riveted with the lower fixing seat 12 at the lower end of the support tube 1.

[0029] When folding, the center seat 51 is pulled up, the inner side of the bottom tube 52 is rotated and gathered towards the lower end of the center seat 51, and the two side tubes 31 on the side frame 3 are gathered and folded towards the riveting point.

[0030] It also comprises a reverse Y-shaped pull rod 13, the two lower tubes 134 of the pull rod 13 are movably riveted with the two lower fixing seats 8 in front, the pull rod 13 comprises an upper tube 132 provided with a handle 131 at the top and a connecting seat 133, the upper tube 132 passes through the middle installation hole of the connecting seat 133 and can move up and down, the left and right sides of the connecting seat 133 are movably riveted with the upper end of the two lower tubes 134, the lower end of the lower tube 134 is movably riveted with the connecting block 14, and the lower tube 134 can rotate left and right relative to the connecting seat 133 and the connecting block 14; the connecting block 14 is movably riveted with the lower fixing seat 8 and can rotate forward and backward around the lower fixing seat 8.

[0031] The upper side of the tube plug 10 is provided with an annular groove, a rectangular cloth bag without a top can be arranged on the expansion cart, the bottom of the cloth bag is arranged on the bottom frame 5, and the top of the cloth bag is movably connected with the top of the tube plug or the extension tube. Specifically, positioning holes are arranged at the top of the four corners of the cloth bag, the positioning holes pass through the tube plug from top to bottom, and then the positioning holes are embedded in the annular groove. The size of the lower side of the annular groove is greater than the hole diameter of the positioning hole. The tube plug 10 can be made of plastic or rubber.

[0032] It should be noted that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A capacity-enhancing trolley, characterized in that, It includes four support tubes with rollers at the bottom, adjacent support tubes are connected by a side frame, and the lower ends of the four support tubes are connected by a base frame; it also includes an extension tube placed inside the support tubes, the lower end of the extension tube has a through hole, the top of the support tube has a limiting hole, and a ball installed inside the extension tube can extend out of the through hole and the limiting hole.

2. The capacity-enhancing trolley according to claim 1, characterized in that, The ball is located on one side of a V-shaped or U-shaped spring sheet, and the spring sheet and the ball are placed inside an extension tube with the ball extending out of the through hole.

3. The capacity-enhancing trolley according to claim 1, characterized in that, It also includes an upper fixing seat installed on the top of the support tube, with the lower end of the extension tube passing through the mounting hole of the upper fixing seat and extending into the support tube; the upper fixing seat is provided with a button corresponding to the position of the limiting hole.

4. The capacity-enhancing trolley according to claim 3, characterized in that, The inner wall of the button has a raised part, which corresponds to the position of the pin.

5. The capacity-enhancing trolley according to claim 3, characterized in that, The extension tube is provided with a tube plug at the top, and the lower edge of the tube plug can be inserted into the mounting hole of the upper fixing seat. The upper fixing seat is provided with a protrusion that matches the tube plug, and the protrusion has a groove that passes through the mounting hole from top to bottom.

6. The capacity-enhancing trolley according to claim 3, characterized in that, The side frame includes at least one X-shaped cross tube, which includes two movably riveted side tubes; the upper end of the side frame is movably riveted to the upper end of the support tube, and the lower end is longitudinally slidably connected to the support tube.

7. The capacity-enhancing trolley according to claim 6, characterized in that, The upper end of the side frame is movably riveted to the upper fixed seat; or, a slider is slidably installed on the support tube, and the lower end of the side frame is movably riveted to the slider.

8. A capacity-enhancing trolley according to claim 6, characterized in that, The base frame includes a central seat and four bottom tubes movably riveted to the four corners of the central seat. The outer ends of the bottom tubes are movably riveted to the lower fixed seats at the lower ends of the support tubes.

9. A capacity-enhancing trolley according to claim 8, characterized in that, It also includes an inverted Y-shaped tie rod, with the two lower tubes of the tie rod being movably riveted to the two lower fixed seats on the front side.

10. A capacity-enhancing trolley according to claim 9, characterized in that, The pull rod also includes an upper tube with a handle at the top and a connecting seat. The upper tube is movably connected to the connecting seat, and the left and right sides of the connecting seat are movably riveted to two lower tubes.

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