TWM666342U - Trolley - Google Patents

Abstract

A trolley includes a frame unit, two wheels respectively mounted on the sides of the frame unit, a bottom scraper mounted on the bottom end of the frame unit so as to be able to swing up and down, at least one transmission unit, and a control unit passing through the frame unit. The wheels can swing forward and backward relative to the frame unit. The at least one transmission unit is connected between the frame, one of the wheels and the bottom scraper, and can drive one of the wheels and the bottom scraper to pivot relative to the frame. The control unit is passed through the frame unit and can move downward to connect the wheels and drive the wheels to swing. One of the wheels can drive the transmission unit to drive the bottom scraper to swing. The trolley can be stored conveniently by virtue of the structural design in which the control unit, the transmission unit, the wheel and the bottom scraper are linked.

Description

Trolley

This new model relates to a means of transport, in particular a trolley.

A known trolley includes a frame unit, two wheels pivoted at left and right intervals at the bottom of the frame unit, and a bottom sled protruding forward from the bottom of the frame unit. The frame unit has a frame on which the wheels can be pivoted and connected to the bottom sled, and two handles connected to the frame and extending upward. The frame is used for goods to lean against, and the handles are used for people to apply force to control the trolley.

As people's concept of making good use of space improves, the trolley has also been improved to a foldable structure design that is convenient for storage. The bottom scraper and the wheels of the known foldable trolley are both located far away from the handles. Therefore, when people want to store the known foldable trolley, they must manually operate the bottom scraper and the wheels to fold the trolley, which is inconvenient.

Therefore, the purpose of the present invention is to provide a trolley that can overcome at least one disadvantage of the prior art.

Therefore, the new trolley includes a frame unit, two wheels, a bottom blade, at least one transmission unit, and a control unit.

The frame unit includes a frame extending up and down.

The wheels are installed at intervals on the left and right sides at the bottom end of the frame. Each wheel can be driven to pivot between a rolling position that can roll forward and backward relative to the frame, and a storage position that is placed against the rear side of the frame.

The bottom scraper is mounted on the front side of the bottom of the frame and can be driven to pivot relative to the frame between a loading position for carrying items and a folding position for swinging upward.

The at least one transmission unit is installed and connected between the frame, one of the wheels and the bottom scraper, and can be used to synchronously drive one of the wheels and the bottom scraper to rotate relative to the frame.

The control unit includes two handlebars spaced left and right and extending up and down through the frame unit. Each handlebar can be operated to move up and down between an unfolded position located above the wheels relative to the frame unit and a clamping position connected downward to the wheel located on the same side of the rolling position. Each handlebar can also be operated to rotate and change between the clamping position and a folded position relative to the frame unit, and synchronously drive the corresponding wheel to change between the rolling position and the storage position, and when the wheel connected to the at least one transmission unit pivots toward the storage position, the bottom blade will be synchronously driven by the at least one transmission unit to change from the carrying position to the folded position.

The utility of the present invention is that the wheels are driven by operating the control unit, and the structural design of at least one drive unit and the bottom scraper are driven synchronously to achieve the purpose of convenient storage of the trolley.

1: Trolley

2: Frame unit

21: Frame

211: Rods

212: Base

213: Top seat

214: Ring

22: Connector

221: Embedded card body

3:Wheels

31: Seat

311: Connection part

32: Wheel body

4: Bottom scraper plate

41: hinged socket

42: Board

5: Transmission unit

51: First gear

52: Second gear

53: Third gear

6: Control unit

61: Grip

611: Operating lever

612: Drive unit

62: Jumper seat

7: Top support

71: Mounting body

72: Top support body

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a three-dimensional diagram illustrating the structure of an embodiment of the present invention trolley and the situation in which the trolley is located in a use position; FIG. 2 is an incomplete three-dimensional diagram illustrating the structure of the embodiment; FIG. 3 is a rear view illustrating the structure of the embodiment; FIG. 4 is a side sectional diagram illustrating the structure of the embodiment and the situation in which the trolley is located in a use position; FIG. 5 is a FIG. 6 is a rear view illustrating the structure of the embodiment, the two handles are in a snap-on position, and the two wheels are in a rolling position; FIG. 7 is a side view illustrating the structure of the embodiment, and the trolley is in a stowed position; and FIG. 8 is an incomplete top view illustrating the structure of the embodiment, and the trolley is in the stowed position.

Referring to Figures 1 to 3, an embodiment of the novel trolley 1 includes a frame unit 2 extending vertically, two wheels 3 respectively mounted on the bottom ends of the left and right sides of the frame unit 2, a bottom brake plate 4 mounted on the bottom end of the frame unit 2 and protruding forward, two transmission units 5, a control unit 6 extending vertically and penetrating the frame unit 2, and a top support 7 mounted on the frame unit 2 and capable of supporting between the wheels 3. The transmission units 5 are mounted on the bottom end of the frame unit 2 at intervals on the left and right sides and connected between the wheels 3 and the bottom brake plate 4. The transmission units 5 can be used to synchronously drive the wheels 3 and the bottom brake plate 4 to pivot relative to the frame unit 2.

The frame unit 2 includes a frame 21 extending up and down and having its bottom for mounting the bottom blade 4, and a connecting seat 22 mounted on the frame 21 so as to be movable up and down.

The frame 21 has two rods 211 spaced apart from each other and extending up and down, a base 212 fixed across the bottom ends of the rods 211 and located on the top side of the bottom blade 4, and a top base 213 fixed across the top ends of the rods 211 and provided for the control unit 6 to be moved up and down and pivotally installed.

A ring 214 is provided on the rear side of the top seat 213 and passes through it vertically.

The connecting seat 22 is connected between the rods 211 and is connected to the control unit 6, and can be driven by the control unit 6 to move up and down along the rods 211. The top side of the connecting seat 22 is provided with an embedded card body 221 protruding upward. When driven by the control unit 6 to move upward toward the top seat 213, the embedded card body 221 can be detachably inserted upward and buckled in the ring body 214, and connected to the top seat 213.

The wheels 3 are mounted on the left and right ends of the base 212 respectively. Each wheel 3 includes a base 31 that can be horizontally pivotally mounted on the base 212, and a wheel body 32 that is mounted on the base 31 and can roll forward and backward. A connecting portion 311 is provided on the top of the base 31 for detachably connecting with the control unit 6.

Each of the wheels 3 can be driven by the connected control unit 6, and can pivot between a rolling position located beside the frame 21 and capable of rolling forward and backward, and a storage position placed against the rear side of the frame 21 relative to the frame 21.

In this embodiment, the wheels 3 are respectively arranged on the sides of the frame 21, but in other embodiments of the present invention, the wheels 3 can also be arranged on the rear side of the frame 21. The above embodiment is only an example and is not limited thereto.

The bottom scraper plate 4 has two pivot seats 41 respectively mounted at the bottom ends of the rods 211 and a plate body 42 connected between the pivot seats 41 and located at the front side of the frame 21.

The bottom scraper plate 4 can be driven to pivot between a loading position for loading articles and a folding position pivoted upward relative to the rods 211. When the bottom scraper plate 4 is in the loading position, the plate body 42 extends forward relative to the rods 211. When the bottom scraper plate 4 changes to the folding position, the plate body 42 pivots upward relative to the rods 211 via the pivot seats 41.

Referring to Figures 2, 3 and 5, each transmission unit 5 includes a first gear 51 axially fixed to the corresponding seat 31, a second gear 52 rotatably mounted axially to the bottom end of the rod 211 and engaged with the first gear 51, and a third gear 53 axially fixed to the corresponding side of the pivot seat 41 and engaged with the second gear 52. In other words, the second gear 52 is engaged between the first gear 51 and the third gear 53.

The control unit 6 includes two grips 61 spaced apart from each other and extending vertically through the frame unit 2, and a bridging seat 62 bridging the top ends of the grips 61. Each grip 61 has an operating rod 611 extending vertically through the bridging seat 62, the connecting seat 22, and the top seat 213, and a driving portion 612 protruding downward from the bottom end of the operating rod 611.

Each of the handlebars 61 can be operated to move up and down between an extended position above the wheels 3 relative to the frame unit 2 and a snap-in position connected downward to the wheels 3 corresponding to the rolling position. Each of the handlebars 61 can also be operated to rotate relative to the frame unit 2 between the snap-in position and a folded position.

When the handles 61 are operated to change from the engaging position to the retracted position, the operating levers 611 drive the driving parts 612 to move downward and are respectively connected to the connecting parts 311 of the wheels 3. When the handles 61 are operated to change from the engaging position to the retracted position, the driving parts 612 synchronously drive the wheels 3 to change from the rolling position to the retracted position. At the same time, the wheels 3 drive the first gears 51 to rotate synchronously, so that the first gears 51 drive the third gears 53 synchronously through the second gears 52, so that the third gears 53 drive the plate body 42 to pivot upward through the pivot seat 41, so that the bottom scraper plate 4 pivots upward from the carrying position to the folded position.

In this embodiment, the driving portion 612 of each handlebar 61 is a plug rod with a non-circular cross section, and the connecting portion 311 of each wheel 3 is a non-circular slot with an opening facing upward. The handlebar 61 can be inserted downwardly and positioned in the connecting portion 311 with the driving portion 612 being unable to rotate relative to each other, and when driven to pivot relative to the frame unit 2 and the cross-connection seat 62, the corresponding seat body 31 is driven to rotate relative to the frame 21 via the driving portion 612. However, in practice, in other implementations of the present invention, the structures of the driving part 612 and the connecting part 311 can be interchanged. In addition, since there are many structures in which the driving part 612 and the connecting part 311 are connected so as not to rotate relative to each other, the implementation is not limited to the above-mentioned embodiments.

The top support member 7 includes a mounting body 71 mounted between the rod members 211, and a top support member 72 that can be pivoted up and down on the mounting body 71 and extends backward. The top support member 72 can be operated to switch between a top support position and an upward swing position relative to the mounting body 71. When the wheels 3 are in the rolling position, the top support member 72 can be operated to pivot downward to the top support position, and the left and right top supports are between the wheels 3, forcing the wheels 3 to be positioned in the rolling position. When the top support member 72 is operated to change to the upward swing position, the wheels 3 can be driven to change to the storage position.

Referring to Figures 1, 7, and 8, the overall structural changes of the trolley 1 are described below. The trolley 1 can be switched between a use state (see Figure 1) and a storage state (see Figures 7 and 8).

Referring to Figures 1, 4 and 5, when the trolley 1 is in the use state, the handles 61 are in the unfolded position, the wheels 3 are in the rolling position, the bottom scraper plate 4 is in the load-bearing position, and the top support body 72 is in the top support position.

Referring to Fig. 6, Fig. 7 and Fig. 8, when the trolley 1 is switched from the use state to the storage state, the top support 72 is driven to swing upward from the top support position to the upward swing position (see Fig. 6). Then, the embedded body 221 is driven to separate from the ring body 214, and the handles 61 are driven to switch from the unfolded position to the engaged position (see Fig. 6), and are respectively connected to the wheels 3. Then, the handlebars 61 are driven to switch to the folded position (see Figures 7 and 8), and the wheels 3 are driven to switch from the rolling position (see Figure 6) to the storage position (see Figures 7 and 8) synchronously, and the bottom blade 4 is driven to switch from the carrying position to the folded position (see Figures 7 and 8) synchronously through the transmission units 5.

In practice, in other embodiments of the present invention, the number of the transmission unit 5 can be changed to only one, that is, only one transmission unit 5 is set between the rod 211 and one of the wheels 3 and the bottom brake plate 4, and the transmission unit 5 can be driven by a single handle 61 to synchronously drive the wheel 3 and the bottom brake plate 4 to change their positions.

In summary, through the structural design of the frame unit 2, the transmission units 5 and the control unit 6, a user can control the handles 61 to control the wheels 3 to switch between the rolling position and the storage position, and synchronously drive the bottom blade 4 to switch between the carrying position and the folding position, which is very convenient. Therefore, the new trolley 1 is indeed a very practical creation and can indeed achieve the purpose of the new invention.

However, the above is only an example of the implementation of this new model, and it cannot be used to limit the scope of the implementation of this new model. All simple equivalent changes and modifications made according to the scope of the patent application of this new model and the content of the patent specification are still within the scope of this new patent.

1: Trolley

2: Frame unit

21: Frame

211: Rods

212: Base

213: Top seat

214: Ring

22: Connector

221: Embedded card body

3:Wheels

31: Seat

311: Connection part

32: Wheel body

4: Bottom scraper plate

42: Board

5: Transmission unit

6: Control unit

61: Grip

611: Operating lever

612: Drive unit

62: Jumper seat

7: Top support

71: Mounting body

72: Top support body

Claims (8)

A handcart comprises: a frame unit, including a frame extending up and down; two wheels, which are installed at intervals on the bottom end of the frame, each of which can be driven to pivot between a rolling position that can roll forward and backward relative to the frame, and a storage position that is swung against the rear side of the frame; a bottom scraper plate, which is installed at the bottom front side of the frame, and can be driven to pivot between a carrying position that can be used to carry articles, and a folding position that is swung upward relative to the frame; at least one transmission unit, which is installed and connected between the frame, one of the wheels and the bottom scraper plate, and can be used to synchronously drive one of the wheels and the bottom scraper plate to pivot relative to the frame; and a The control unit includes two handlebars spaced left and right and extending up and down through the frame unit. Each handlebar can be operated to move up and down between an unfolded position located above the wheels relative to the frame unit and a clamping position connected downward to the wheel located on the same side of the rolling position. Each handlebar can also be operated to rotate and change between the clamping position and a folded position relative to the frame unit, and synchronously drive the corresponding wheel to change between the rolling position and the storage position. When the wheel connected to the at least one transmission unit pivots toward the storage position, the bottom blade is synchronously driven by the at least one transmission unit to change from the carrying position to the folded position. As described in claim 1, each of the handlebars has an operating lever extending up and down and being movable and pivotally disposed in the frame unit, and a driving portion connected to the bottom end of the operating lever and being used to connect the wheel. Each of the wheels includes a seat body that is horizontally pivotally mounted on the bottom end of the frame, and a wheel body that is mounted on the seat body and can roll forward and backward. The seat body has a connecting portion for connecting the corresponding handlebar. When each of the handlebars is in the clamping position, the connecting portion and the driving portion are non-rotatably connected. The cart as described in claim 2, wherein the at least one transmission unit includes a first gear axially fixed to the seat body corresponding to the wheel, a second gear rotatably mounted axially to the frame and meshed with the first gear, and a third gear axially fixed to the bottom scraper plate and meshed with the second gear. When the wheel connected to the at least one transmission unit pivots between the rolling position and the storage position, the second gear and the third gear are synchronously driven to rotate through the first gear, and the bottom scraper plate is synchronously driven to change between the carrying position and the folding position. The trolley as described in claim 3 comprises two transmission units, which are installed and connected between the frame, the wheels and the bottom scraper. A trolley as described in any one of claims 2 to 4, wherein the frame has two rods spaced apart from each other, a base mounted on the bottom ends of the rods and located on the top side of the bottom scraper plate, and a top seat mounted on the top ends of the rods and through which the operating rods can be moved up and down and pivotally passed, and the seat bodies are mounted on the base. The trolley as described in claim 5, wherein the frame unit further includes a connecting seat mounted on the rods movably up and down, when the connecting seat is upwardly aligned with the top seat, the connecting seat can be detachably assembled with the top seat, the operating rods can be pivotally connected to the connecting seat, and the operating rods can drive the connecting seat to move up and down between the top seat and the base. As in claim 6, the control unit further includes a cross-connection seat through which the rods can be pivotally mounted, and the cross-connection seat can be driven by the rods to move up and down on the top side of the top seat. The trolley as described in claim 2 further includes a top support member disposed on the frame and capable of being supported between the seat bodies, the top support member including a mounting body mounted on the frame, and a top support body that can be pivotally mounted on the mounting body and extends rearward, the top support body can be in a top supporting position relative to the mounting body, and a When the wheels are in the rolling position, the top support can be operated to swing downward to the top support position, and the left and right top supports are between the wheels, forcing the wheels to be positioned in the rolling position. When the top support is operated to the swing position, the wheels can be driven to the storage position.

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