TW202200427A - Effort-saving hand truck that comprises a truck main body, an assisting support base having a base body and auxiliary roller, and a controllable angle adjustor - Google Patents

Abstract

An effort-saving hand truck comprises: a truck main body; an assisting support base that has a base body and an auxiliary roller, a front end of the base body being pivotally connected with the truck main body, the auxiliary roller being mounted on a bottom of a rear end of the base body; and a controllable angle adjustor that has an extending device, a controller, and a driver, the extending device having an end pivotally connected with the truck main body and an opposite end pivotally connected with a top of a rear end of the assisting support base, the controller being mounted on the truck main body to be acted upon by an external force for reciprocal motion between an adjustment position and a fixing position, the driver being connected between the controller and the extending device. When the controller is at the adjustment position, the driver operates the extending device so as to make the extending device moving and shifting, and an angle between the assisting support base and the truck main body is adjustable, and when the controller is at the fixing position, the extending device is constrained and fixed, and the angle between the assisting support base and the truck main body is fixed. As such, adjustment and fixing of the angle between the assisting support base and the truck main body can be realized to achieve an advantage of saving effort and best adaptability.

Description

Effortless trolley

This creation is related to trolleys, and more specifically refers to a labor-saving trolley.

According to the general trolley, it is mainly divided into four-wheeled and two-wheeled. Among them, the four-wheeled trolley has a larger floor area, which can be used to stack wider items. It can be pushed more smoothly on wide roads, but it is large and difficult to store, and it is less flexible to push on narrow roads. The trolley has a small floor area, but it can be used to push higher items. It is more laborious to push, but it is more flexible on narrow roads. Since four-wheeled trolleys and two-wheeled trolleys have their own advantages and disadvantages, each has its own advantages and disadvantages. Favorite group. Here, for the two-wheeled trolley, its structure mainly has a L-shaped carrier and two wheel bodies pivotally connected to the bottom of the carrier. The goods are stacked on the carrier. The carrier is pulled down from the upright state to the inclined state, so that the bottom of the carrier is out of contact with the ground, and only the wheel body is in contact with the ground, and the user can push the carrier to walk to move the goods. However, when such a two-wheeled trolley is being pushed, the user must not only exert a forward (or backward) force on the trolley, but also apply an upward force on the trolley to resist the cargo 90 The downward gravitational force is used to maintain the support frame in a slanted state, but as a result, the user will be very laborious when pushing.

In view of this, in order to improve the prior art, the conventional two-wheeled trolley has a relatively laborious problem in use. Therefore, this creation provides a labor-saving cart, which includes: a cart main body; an auxiliary support base, which has a base body and an auxiliary wheel, the front end of the base body is pivotally connected with the main body of the cart, and the auxiliary wheel is arranged on the The bottom of the rear end of the seat body; a controllable angle adjuster, which has a retractor, a controller and a link, one end of the retractor is pivotally connected to the main body of the cart, and the other end is pivoted to the top of the rear end of the auxiliary support base Then, the controller is arranged on the main body of the cart, and can be acted on by external force to reciprocate between an adjustment position and a fixed position, and the link is connected between the controller and the retractor; when the controller is located in When the position is adjusted, the retractor is actuated through the link, so that the retractor can move and displace, and the angle between the auxiliary support base and the main body of the cart can be adjusted. When the controller is in a fixed position, the retractor is restricted Fixing, the angle between the auxiliary support base and the main body of the cart is fixed, so that the angle between the auxiliary support base and the main body of the cart can be adjusted and fixed, so as to achieve the effects of labor saving and good applicability.

In order to enable your review committee to have a further understanding and recognition of the features and characteristics of this creation, the following examples are listed and described with the drawings as follows: Please refer to the first figure to the eighth figure, which is a labor-saving trolley 100 provided by a preferred embodiment of the present invention. Please refer to the first and second figures, the cart body 10 has a carrier 11 and a wheel set 12 . The carrier 11 is generally L-shaped and has a bottom plate 111 and a vertical frame 112 connected to one side of the bottom plate 111 and extending upward. The wheel set 12 is pivotally connected to the bottom of the carrier frame 11 , and the wheel set 12 has a The wheel shaft 121 and the second wheel body 122, the wheel shaft 122 is pivoted in the vertical frame 112 laterally, and the second wheel body 122 is connected to the two ends of the wheel shaft 121, so that the second wheel body 122 can rotate in place relative to the carrying frame 11 . Please refer to the first and second figures, the auxiliary support base 20 has a base 21 and an auxiliary wheel 22 . The front end of the seat body 21 is pivotally connected with the axle 121 of the main body 10 of the cart, so that the front end of the seat body 21 can be opened and closed relative to the main body 10 of the cart within a predetermined angle. The auxiliary wheel 22 is connected to the main body 10 of the cart The bottom of the rear end of the base body 21 can be rotated in place relative to the base body 21 . Please refer to the first to fourth figures, the controllable angle adjuster 30 has a retractor 40 , a controller 50 and a link 60 . One end of the retractor 40 is pivotally connected to the upright frame 112 of the main body 10 of the cart, and the other end is pivotally connected to the top of the rear end of the base body 21 of the auxiliary support base 20 . The controller 50 is disposed on the cart The upright frame 112 of the main body 10 can be acted on by an external force to reciprocate between an adjustment position and a fixed position. The link 60 is connected between the retractor 40 and the controller 50 so that when the controller 50 When in the adjustment position, the linker 60 is linked with the retractor 40 to act, so that the retractor 40 can be freely extended and shortened to adjust the angle between the auxiliary support base 20 and the cart main body 10 . When the controller 50 is at the fixed position, the retractor 40 is restricted and cannot be extended or shortened any more, so as to fix the angle between the auxiliary support base 20 and the main body 10 of the cart. Thus, the effect of being able to adjust the angle between the auxiliary support base 20 and the main body 10 of the cart and to fix the angle between the auxiliary support base 20 and the main body 10 of the cart can be achieved. Please refer to the first to fourth figures. In this embodiment, the retractor 40 has an outer tube 41 , an inner tube 42 , an action piece 43 , two torsion springs 44 , two fixed tubes 45 , and a through shaft 46 , a carrier frame connector 47 and a support base connector 48 . The outer tube 41 radially defines an opening 411 that communicates with the inside and the outside. The tube opening 421 communicates with the outer tube opening 411; the action piece 43 has an outer connection piece 431 and an inner connection tube 432 connected to one end of the outer connection piece 431, and the inner connection tube 432 of the action piece 43 is arranged on the Inside the inner tube 42 , the outer connecting piece 431 protrudes out of the inner tube opening 421 and the outer tube opening 411 ; the two torsion springs 44 are arranged in the inner tube 42 and located between the action piece 43 . Outside the two ends of the inner connecting tube 432 , the two torsion springs 44 are respectively tightly pressed against the two ends of the inner connecting tube 432 connected to the action piece 43 with their one end (inner end), so that the two torsion springs 44 are connected with the action member 43 . The two fixing tubes 45 are arranged in the outer tube 41 and are fixedly connected with the outer tube 41, so that the two fixing tubes 45 are respectively abutted on the two ends of the inner tube 42, and each They are respectively connected to the outer ends of the torsion springs 44 to limit the axial positions of the inner tube 42 , the action piece 43 and the torsion spring 44 in the outer tube 41 by the two fixing tubes 45 ; The two fixed tubes 45, the two torsion springs 44 and the inner connecting tube 432 of the action piece 43, and the two ends of the shaft 46 protrude out of the two ends of the outer tube 41; the carrier connecting piece 47 , has a bearing frame pivoting portion 471 and a passing portion 472 connected with the bearing frame pivoting portion 471, the bearing frame pivoting portion 471 is pivotally connected with the vertical frame 112 of the bearing frame 11 of the cart main body 10, The penetration portion 472 has a through hole 473 through which one end of the shaft 46 can pass through; the support base connector 48 has one end pivotally connected to the rear top of the base body 21 of the auxiliary support base 20 , and the other end Then it is connected with the other end of the shaft 46 . Please refer to the first and second figures. In this embodiment, the controller 50 is generally a brake lever, which is in an adjusted position when pressed by an external force, and is in a fixed position when the external force is released. Please refer to the first and second figures, the link 60 is a wire body, one end is connected to the controller 50 , and the other end is connected to the outer connecting piece 431 of the action member 43 of the retractor 40 . Therefore, the above is the introduction of the various components of the labor-saving trolley 100 and the combination method thereof provided by a preferred embodiment of the present creation, and then the use characteristics thereof are introduced as follows: First of all, when using the present invention, the goods 90 are first stacked on the carrier 11 of the main body 10 of the cart, and then the top of the carrier 11 is held by hand, and the carrier 11 is tilted downward until it is used. It is suitable for the height of the moving (as shown in the fifth picture). Then, the user presses the controller 50 of the controllable angle adjuster 30 to the adjustment position, so that the controller 50 pulls the action member 43 of the retractor 40 through the link 60 to turn it (as shown in the sixth figure). shown), the torsion spring 44 is loosened by the actuating member 43 driven by the pull, so that a gap is formed between the through shaft 46 and the torsion spring 44, that is, the torsion spring 44 is no longer connected to the through shaft 46 at this time. Tighten, so that the through shaft 46 can move axially in the torsion spring 44, so that the auxiliary support base 20 connected with the through shaft 46 will be pivoted downward by its own weight until the auxiliary wheel 22 touches the ground (as shown in Figure 7). Next, the user loosens the controller 50 to restore the controller 50 to a fixed position. At this time, the torsion spring 44 is no longer acted by the linkage 60 , that is, the torsion spring 44 returns to the tightened state and is re-stretched. Tightening on the through shaft 46 (as shown in the eighth figure), the through shaft 46 can no longer move and displace, and at the same time, the angle (incl. angle) between the auxiliary support base 20 and the cart main body 10 is fixed. In this way, even if the user no longer exerts force on the cart body 10, the inclined cart body 10 can still be supported by the cooperation of the auxiliary support base 20 and the controllable angle adjuster 30. fixed. Therefore, in this way, when the user pushes the creation, there is no need to exert an upward force on the main body of the cart to resist the downward gravity of the cargo 90, and only need to exert the force previously performed. , in order to achieve the effect of labor-saving promotion. In addition, in the present invention, the angle at which the cart body 10 is tilted and then fixed can be determined by the angle when the user initially pulls the cart body 10 to swing down, so different users can adopt different tilt angles, that is, the present work can Any inclination angle of the main body 10 of the cart can be fixed, so as to be suitable for users of different heights, so as to improve the applicability of the present creation. Furthermore, as shown in the ninth figure, the main body of the cart 10 of the present invention further has a basket body 13, and the basket body 13 is fixed on the carrier frame 11, so that the user can place irregular small items, thereby Increase the versatility of this creation. The above disclosure is only a preferred embodiment provided by this creation, and is not intended to limit the scope of implementation of this creation. All the equivalent changes made by those skilled in the art according to this creation shall belong to this creation. scope of coverage.

100: Effortless trolley 10: The main body of the cart 11: Carrier 111: Bottom plate 112: Stand 12: Wheel set 121: Axle 122: Wheel body 13: Basket 20: Auxiliary support seat 21: seat body 22: Auxiliary wheel 30: Controllable angle adjuster 40: Retractor 41: Outer tube 411: Outer tube opening 42: Inner tube 421: Inner tube opening 43: Action piece 431: External connection piece 432: Internal connecting pipe 44: Torsion spring 45: Fixed tube 46: Through the shaft 47: Carrier frame connector 471: Bearing frame pivot 472: Wearing Department 473: Piercing 48: Support seat connector 50: Controller 60: Linker 90: Cargo

The first figure is an exploded perspective view of a preferred embodiment of the present invention. The second figure is a three-dimensional combined view of the embodiment shown in the first figure. The third figure is an exploded view of the partial components of the embodiment shown in the first figure. Figure 4 is a sectional view of a part of the components of the embodiment shown in Figure 1. Figures 5 to 8 are schematic views of the operation of the embodiment shown in the first figure. The ninth figure is a three-dimensional view of another embodiment of this creation.

100: Effortless trolley

10: The main body of the cart

11: Carrier

111: Bottom plate

112: Stand

12: Wheel set

121: Axle

122: Wheel body

13: Basket

20: Auxiliary support seat

21: seat body

22: Auxiliary wheel

30: Controllable angle adjuster

40: Retractor

50: Controller

60: Linker

Claims (10)

A labor-saving trolley comprising: a cart body; an auxiliary support base, which has a base body and an auxiliary wheel, the front end of the base body is pivotally connected with the main body of the cart, and the auxiliary wheel is arranged at the bottom of the rear end of the base body; A controllable angle adjuster has a retractor, a controller and a link. One end of the retractor is pivotally connected to the main body of the cart, and the other end is pivotally connected to the top of the rear end of the auxiliary support base. The controller is arranged at The main body of the cart can be acted on by an external force to reciprocate between an adjustment position and a fixed position, and the linkage is connected between the controller and the retractor; When the controller is in the adjustment position, the retractor is actuated through the link, so that the retractor can move and displace, and the angle between the auxiliary support base and the main body of the cart can be adjusted. When the controller is in the fixed position, The retractor is limited and fixed, and the angle between the auxiliary support base and the main body of the cart is fixed. The labor-saving trolley according to claim 1, wherein the main body of the trolley has a carrying frame and a wheel set; the carrying frame has a bottom plate and a vertical frame connected to one side of the bottom plate and extending upward, and the wheel set has a A wheel shaft and two wheel bodies, the wheel shaft is pivoted through the vertical frame, and the two wheel system is connected to the two ends of the wheel shaft; the front end of the seat body of the auxiliary support base is pivotally connected to the wheel shaft, and one end of the retractor is connected to the wheel shaft. The vertical frame of the main body of the cart is pivotally connected, and the controller is located on the vertical frame. The labor-saving trolley according to claim 2, wherein the main body of the trolley further has a basket body, and the basket system is fixed on the carrier frame. The labor-saving trolley according to claim 1, wherein the controller is a brake lever, which is located at the adjustment position when pressed by an external force, and is located at a fixed position after the external force is released. The labor-saving trolley according to claim 1, wherein the linkage is a wire, one end is connected to the controller, and the other end is connected to the retractor. The labor-saving trolley according to claim 1, wherein the retractor has an outer tube, an action piece, at least one torsion spring, a through shaft, a bearing frame connecting piece and a support seat connecting piece; the outer tube radially opens There is an opening that communicates with the inner and outer tubes; the action piece has an outer connection piece and an inner connection tube connected with the outer connection piece, the inner connection tube is set in the outer tube, and the outer connection piece is protruded from the The outer tube is open to the outside and is connected with the coupling; the torsion spring is arranged in the outer tube, one end is connected to the inner connecting tube of the action piece, and the other end is connected to the outer tube; The torsion spring and the inner connecting tube of the action piece, the two ends of the through shaft protrude out of the two ends of the outer tube; the bearing frame connecting piece is pivotally connected with the main body of the cart, and has a through hole, the through hole is used for One end of the pass-through shaft is passed through; the support base connector is pivotally connected to the rear top of the base of the auxiliary support base, and is connected with the other end of the pass-through shaft; when the controller is in a fixed position, the torque The spring system is fastened on the through shaft, so that the through shaft cannot move and displace. When the controller is in the adjustment position, the torsion spring system releases the through shaft, so that the through shaft can move and displace. The labor-saving trolley according to claim 6, wherein the retractor further has an inner tube, the inner tube is arranged in the outer tube, the inner tube radially defines an inner tube opening communicating with the inside and the outside, the inner tube The opening communicates with the opening of the outer tube; the torsion spring is located in the inner tube, the inner connecting tube of the action piece is located in the inner tube, and the outer connecting piece passes through the opening of the inner tube and the opening of the outer tube at the same time outside. The labor-saving trolley according to claim 6, wherein the retractor further has at least one fixed pipe, the fixed pipe is arranged in the outer pipe for the shaft to pass through, and the fixed pipe is fixedly connected with the outer pipe, and connected to the other end of the torsion spring to indirectly connect the torsion spring with the outer tube through the fixing tube. The labor-saving trolley as claimed in claim 6, wherein the carrier connecting member has a carrier pivot portion and an insertion portion connected to the carrier pivot portion, and the carrier pivot portion is connected to the cart main body In pivot connection, the through hole is formed in the through portion. The labor-saving trolley according to claim 1, wherein the retractor has an outer tube, an inner tube, an action piece, two torsion springs, two fixed tubes, a through shaft, a carrier frame connector and a support base connector The outer tube is provided with an opening that communicates with the inner and outer tubes in the radial direction; the inner tube is arranged in the outer tube, and the inner tube is radially provided with an inner tube opening that communicates with the inside and the outside, and the inner tube opening is connected to the outer tube. The tube opening is communicated; the action piece has an outer connection piece and an inner connection tube connected with one end of the outer connection piece, the inner connection tube of the action piece is arranged in the inner tube, and the outer connection piece is protruded from the The inner tube opening is outside the outer tube opening , and is connected with the link; the two torsion springs are arranged in the inner tube, and are located outside the two ends of the inner connecting tube of the action piece, and the two torsion springs are respectively connected to the action by their inner ends. The two ends of the inner connecting tube are connected to the two torsion springs to form a linkage with the acting member; the two fixed tubes are arranged in the outer tube and are fixedly connected with the outer tube, so that the two fixed tubes are respectively contacted by the two fixed tubes. Connected to the two ends of the inner tube, and connected to the outer ends of the torsion springs respectively; the through shaft passes through the two fixed tubes, the two torsion springs and the inner connecting tube of the action piece, and the through shaft The two ends of the outer tube protrude out of the two ends of the outer tube; the bearing frame connecting piece has a bearing frame pivoting part and a passing part connected with the bearing frame pivoting part, and the bearing frame pivoting part is connected with the bearing frame The main body of the cart is pivotally connected, and the penetration portion has a hole through which one end of the shaft passes through; one end of the support base connecting piece is pivotally connected with the rear top of the base of the auxiliary support base, and the other end is connected with The other end of the shaft is connected.

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