KR102522520B1 - Electric assist carrier - Google Patents

Abstract

In accordance with the present disclosure, an electric assist carrier includes: a transport part having at least a partial area dented to form a storage area for an object to be transported, and having at least a partial area on one side opened to form a grip part; a handle part capable of being rotated within a predetermined angle range around a connection end connected to one side of the transport part, and formed to be seated in the storage area by being rotated in a direction adjacent to one side of the storage area; front wheels provided on both sides in the front of the transport part to be freely rotated; rear wheels on both sides in the rear of the transport part to be freely rotated; a driving part connected to the front wheel to provide a rotating force to the front wheels; a power supply part formed to supply power to the driving part; and a slider member coupled to the outer surface of both sides of the storage area. The handle unit includes a driving switch part connected to communication with the driving part to receive a pressing operation in one direction as a trigger signal for operating the driving part. The driving part is further formed to provide a rotating force in one direction to the front wheels according to an operation signal of the driving switch part having received the trigger signal. The height of the slider member is positioned between the height of ground contact points of the front wheels and the rear wheels and the height of the bottom surface of the transport part. Therefore, the present invention is capable of improving working efficiency and the life quality of delivery business employees.

Description

Electric Assist Carrying Device {ELECTRIC ASSIST CARRIER}

Embodiments of the present disclosure relate to an electric assist conveying device.

Recently, the domestic parcel delivery market has been steadily growing, and sales of the domestic parcel delivery market are approaching 10 trillion won. Along with this growth, problems such as injury and death due to overwork of courier workers are steadily emerging, and various solutions to alleviate the excessive work of courier workers are urgently needed.

In particular, among the work of the courier workers, the physically demanding work is the drop-off and delivery and pick-up and drop-off work, and almost all of the related tasks are performed manually.

In relation to this, since most of the existing transport devices used for drop-off delivery and collection loading operations are not designed in consideration of frequent loading and unloading, the transport device itself is directly raised above a predetermined height when passing through stairs, steps, etc., or when loading into a vehicle. Since it must be lifted and moved, there is a problem in that inconvenience increases when using the transport device.

In addition, since conventional transport devices must be manually pushed or pulled when loading and moving an object to be transported, a lot of physical and physical burden is imposed on the user, and work efficiency is also reduced.

In order to solve the above problems, additional power is supported when the object is loaded and moved so that the object can be moved more easily, and power transmission can be easily blocked even at the moment when power is not needed. Stairs, The situation is gradually increasing the need for an electric assist transport device capable of passing through a step or the like more easily through a step or the like having a predetermined height when the wheel is provided when the step or the like is loaded on the vehicle.

Republic of Korea Patent Registration No. 10-2458442 (2022.10.20)

Embodiments of the present disclosure relate to an electric assist transport device that improves the problems of the conventional transport devices described above, and additionally supports power when a transport object is loaded and moved so that the transport object can be moved more easily. It is an object of the present invention to provide an electric assist transport device.

In addition, embodiments of the present disclosure have an object to provide an electric assist conveying device that can easily and automatically cut off power transmission even at a moment when supported power is not needed.

In addition, embodiments of the present disclosure are aimed at providing an electric assist transport device capable of allowing a wheel provided to pass through a step having a predetermined height more easily when passing through a staircase, a step, or the like, or when loading onto a vehicle. to be

The technical problems to be achieved in the embodiments of the present disclosure are not limited to the above-mentioned matters, and other technical problems that are not mentioned are not limited to those skilled in the art from various embodiments to be described below. can be considered by

According to one embodiment of the present disclosure, an electric assist carrying device includes: a carrying unit in which at least a partial area is recessed to form an accommodation area for an object to be transported and at least a partial area on one side is opened to form a gripping portion; a handle part configured to be rotated within a predetermined angular range with respect to a connection end connected to one side of the carrying unit and to be seated in the accommodation area by being rotated in a direction in contact with one surface of the accommodation area; Front wheels provided on both sides of the front of the carrying unit and configured to rotate freely; rear wheels provided on both sides of the rear of the carrying unit and configured to rotate freely; a driving unit connected to the front wheel and configured to provide rotational force to the front wheel; a power supply unit configured to supply power to the driving unit; And a slider member coupled to outer surfaces of both sides of the receiving area, wherein the handle unit is connected to the driving unit in communication and includes a driving switch unit configured to receive a pressing operation in one direction as a trigger signal for operating the driving unit. And, the driving unit is further configured to provide a rotational force in one direction to the front wheel according to an operation signal of the driving switch unit receiving the trigger signal, and the height of the lower surface of the slider member is the front wheel and the rear wheel. It may be characterized in that the position is set between the height of the ground contact of the wheel and the height of the bottom surface of the carrying unit.

In addition, according to one embodiment of the present disclosure, the drive unit, a spline is formed on the outer circumferential surface of the wheel rotation center axis is fixed by being inserted into the rotation center of the front wheel; an inside circular plate formed on an inner surface of a boss engaged with the spline formed at the other end of the central axis of rotation of the wheel; an outside circular plate configured such that an outer circumferential surface of the inside circular plate is interpolated and slipped; an electric motor configured to provide power for rotating the outer circular plate in one direction; And a coupling structure configured to transmit the rotational force of the electric motor to the outside circular plate, wherein the outside circular plate,

At least one intaglio receiving hole having a width tapering in one direction is formed on an inner surface thereof, and an elastic body disposed curvedly corresponding to the shape of the intaglio receiving hole inside the intaglio receiving hole; and a cylindrical pin member that is pressed in the short width direction of the engraving receiving hole by the elasticity of the elastic body, and when the outside circular plate rotates in one direction, the pin member is positioned in the short width direction of the engraving receiving hole. to transmit the rotational force of the outside circular plate to the inside circular plate by pressing the outer circumferential surface of the inside circular plate, and when the inside circular plate rotates in the other direction, the pin member compresses the elastic body and the intaglio receiving hole It may be characterized in that it is located in the long width direction of to block transmission of rotational force between the inside circular plate and the outside circular plate.

In addition, according to one embodiment of the present disclosure, the front wheel and the rear wheel are divided into a first front wheel and a first rear wheel provided on one side and a second front wheel and a second rear wheel provided on the other side, The driving switch unit is configured to be tiltable within a predetermined angular range in the forward and backward directions based on the center in the longitudinal direction according to the position of the point of action of the pressing operation, and is provided on one side according to the tilted angle. The first front wheel And it may be further configured to generate an operating signal generating an angular speed difference between the second front wheel and the second rear wheel provided on the first rear wheel and the other side.

According to the embodiments of the present disclosure, when an object is loaded and moved, additional power is supported so that the object can be moved more easily, thereby preventing musculoskeletal disorders of delivery workers and improving work efficiency. It can improve the quality of life of workers.

In addition, according to embodiments of the present disclosure, power transmission can be easily and automatically cut off even at a moment when the supported power is not needed.

In addition, according to embodiments of the present disclosure, when passing through stairs, steps, or the like or loading onto a vehicle, a wheel provided can more easily pass through a step having a predetermined height.

BRIEF DESCRIPTION OF THE DRAWINGS Included as part of the detailed description to aid understanding of the embodiments, the accompanying drawings provide various embodiments and, together with the detailed description, describe technical features of the various embodiments.
1 is a schematic perspective view for explaining an electric assist transport device according to an embodiment of the present disclosure.
2 is a schematic operating state diagram for explaining a handle unit according to an embodiment of the present disclosure.
3 is a schematic cross-sectional view illustrating a driving switch unit of a handle unit according to an embodiment of the present disclosure.
4 is a schematic operating state diagram for explaining a driving switch unit of a handle unit according to an additional embodiment of the present disclosure.
5 is a schematic perspective view for explaining a driving unit according to an embodiment of the present disclosure.
6 is a schematic side view illustrating an operating principle according to a coupling relationship between an inside circular plate and an outside circular plate according to an embodiment of the present disclosure.
7 is a schematic side view for explaining an operating principle according to a coupling relationship between an inside circular plate and an outside circular plate according to an embodiment of the present disclosure.
8 is a schematic operating state diagram for explaining a slider member according to an embodiment of the present disclosure.
9 is an exemplary view for explaining a detailed configuration of a slider member according to an additional embodiment of the present disclosure.
10 is a schematic illustration for explaining a gripping unit according to an embodiment of the present disclosure.

Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted. In addition, embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or limited thereto and can be modified and implemented in various ways by those skilled in the art.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another element interposed therebetween. . Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated. Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term.

1 is a schematic perspective view for explaining an electric assist transport device 10 according to an embodiment of the present disclosure.

The electric assist transport device 10 according to an embodiment of the present disclosure may be configured to accommodate an object to be transported and to provide power for moving the object according to a user's pressing motion in one direction.

More specifically, the electric assist conveying device 10 according to an embodiment of the present disclosure includes a carrying unit 100, a handle unit 200, a slider member 300, a front wheel 400, and a rear wheel 500. , a power supply unit 600, and a driving unit 700 may be included.

In the carrying unit 100 according to an embodiment of the present disclosure, at least a partial area may be depressed to form an accommodation area 110 for an object to be transported, and at least a partial area on one side may be opened so that the gripping unit 120 can be formed

As an example, the transport unit 100 according to an embodiment of the present disclosure is composed of a plate having a square shape, and at least a partial area may be recessed into a square shape to accommodate a transport object, and the handle portion ( 200) may be formed by extending the accommodating area 110 to the point where the handle part 200 is provided, and at least a part of the area between the two points where the connection end 210 of the handle part 200 is fastened is opened so that the gripping part 120 It can be configured to form.

The handle unit 200 according to an embodiment of the present disclosure may be rotatable within a predetermined angular range based on the connection end 210 connected to one side of the carrying unit 100, and the It may be configured to be seated in the receiving area 110 by rotating in a direction in contact with one surface.

As an example, the handle unit 200 according to an embodiment of the present disclosure may have both ends connected to one side of the carrying unit 100 to form two connection ends 210, and the two connection ends ( 210) by a predetermined length, but at least some of the extended regions are inclined so as to widen in both directions, so that the internal area of the entire frame constituting the handle part 200 can be expanded, and the inclined region has a predetermined length. It is formed by extending again by a predetermined height (preferably, a height corresponding to the position of the waist or the stomach of a standing user) based on a state in which the handle part 200 is standing perpendicular to the carrying part 100 The gripping area of the handle part 200 may be formed by meeting the two areas that are vertically bent and extended in the inward direction.

In addition, in the handle unit 200 according to an embodiment of the present disclosure, the connection ends 210 are hinged to both sides of the gripping unit 120 formed on one side of the carrying unit 100, and the handle unit 200 is hinged within a predetermined angle range. It can be configured to be rotatable, and more specifically, when the electric assist conveying device 10 is viewed from the side, the handle part 200 is standing perpendicular to the carrying part 100 from the angle at which the connection end 210 Based on , the handle part 200 may be configured to be rotatable within a range up to an angle at which the handle part 200 comes into contact with the bottom surface of the receiving area 110 of the carrying part 100 .

2 is a schematic operating state diagram for explaining the handle unit 200 according to an embodiment of the present disclosure.

As shown in (a) of FIG. 2 , the handle unit 200 according to an embodiment of the present disclosure is fastened to one side of the carrying unit 100 to maintain a standing state so as to be perpendicular to the carrying unit 100. can In addition, as shown in (b) of FIG. 2 , the handle unit 200 according to an embodiment of the present disclosure has a forward direction relative to a point where the connection end 210 fastened to the carrying unit 100 is provided. (For reference, the entire handle part 200 can be seated in the accommodation area 110 of the carrying unit 100 by tilting to the right side in FIG. 2 and touching one surface of the accommodation area 110, that is, the bottom surface. .

Accordingly, the user adjusts the angle of the handle part 200 as needed to load and transport the object in the standing state of the handle part 200, or as shown in FIG. 8, the handle part 200 The entire electric assist conveying device 10 may be moved through the gripping part 120 of the carrying part 100 in a seated state on the receiving area 110, that is, in a state in which the handle part 200 is folded.

Referring back to FIG. 1 , the electric assist transport device 10 according to an embodiment of the present disclosure includes front wheels 400 provided on both front sides of the transport unit 100 and configured to rotate freely, and the transport unit 100 ) It may include a rear wheel 500 provided on both sides of the rear side and configured to rotate freely.

That is, one front wheel 400 according to an embodiment of the present disclosure is provided on both sides of the carrying unit 100 opposite to the side on which the handle unit 200 is provided, so that the first front wheel 400-a and A second front wheel 400-b may be configured. In addition, one rear wheel 500 according to an embodiment of the present disclosure is provided on both sides of the side where the handle unit 200 is provided in the carrying unit 100, so that the first rear wheel 500-a and the second rear wheel 500-a are provided. 2 rear wheels (500-b) can be configured.

In addition, the front wheel 400 and the rear wheel 500 according to an embodiment of the present disclosure are provided on one side (ie, the left side) of the transport unit 100 in the width direction. a) and the first rear wheel 500-a and the second front wheel 400-b and the second rear wheel 500-b provided on the other side (ie, the right side). That is, according to an embodiment of the present disclosure, the first front wheel 400-a may be provided on the front left side of the transport unit 100, and the second front wheel 400-b may be provided on the transport unit 100. , the first rear wheel 500-a may be provided on the rear left side of the transport unit 100, and the second rear wheel 500-b is provided on the rear side of the transport unit 100. It may be provided on the right side.

According to one embodiment of the present disclosure, the electric assist conveying device 10 is connected to the front wheel 400 to provide power to the driving unit 700 and the driving unit 700 configured to provide rotational force to the front wheel 400. It may include a power supply unit 600 configured to supply.

That is, the drive unit 700 according to an embodiment of the present disclosure may be mounted on a partial region of the front side of the transport unit 100 and is mechanically connected to the front wheel 400 to drive the front wheel 400 in one direction. It can be configured to rotate.

In addition, the power supply unit 600 according to an embodiment of the present disclosure is provided in a partial area of the front side of the transport unit 100 and is provided in a position adjacent to the driving unit 700 to supply power to the driving unit 700 for operation. In addition to providing, it may be configured to provide power for the operation of the electric assist transport device 10, such as the driving switch unit 220 to be described later.

As an example, the power supply unit 600 according to an embodiment of the present disclosure may be implemented as a rechargeable battery, and may be configured to be detachably coupled to the carrying unit 100 in a replaceable manner.

3 is a schematic cross-sectional view for explaining the drive switch unit 220 of the handle unit 200 according to an embodiment of the present disclosure.

The handle unit 200 according to an embodiment of the present disclosure is provided in a gripping area provided on the opposite side of the connection end 210 fastened to the carrying unit 100, and moves by a predetermined distance according to a pressing operation. It may include a driving switch unit 220 configured to elastically return to the original position after moving.

As shown on the left side of FIG. 3 , the driving switch unit 220 according to an embodiment of the present disclosure may move a part of the gripping area of the handle unit 200 in one direction, preferably, in the rear direction (for reference, It is configured to cover in the left direction in FIG. 3), and the inner surface may be configured to be elastically supported by a separate elastic member (not shown) so as to have a predetermined distance from one surface of the handle unit 200.

Then, as shown on the right side of FIG. 3, the driving switch unit 220 according to an embodiment of the present disclosure has an inner surface in contact with one surface of the handle unit 200 in one direction (for reference, in FIG. 3 When pressed in the right direction), it may be configured to move by a predetermined distance in the pressed direction to contact one surface of the handle unit 200 and transmit an operation signal to the driving unit 700 at the same time.

That is, the driving switch unit 220 according to an embodiment of the present disclosure may be configured to be communicatively connected to the driving unit 700 and receive a pressing operation in one direction as a trigger signal for operating the driving unit 700. . In addition, the driving unit 700 according to an embodiment of the present disclosure is configured to operate according to an operation signal of the driving switch unit 220 receiving the trigger signal to provide rotational force in one direction to the front wheel 400. It can be.

Accordingly, the electric assist conveying device 10 according to an embodiment of the present disclosure can easily provide power in the traveling direction in response to the user's pushing motion in contact with the handle unit 200, and also the user's In the pull operation, power may not be provided in the forward direction by not pressing the drive switch unit 220 .

4 is a schematic operating state diagram for explaining the drive switch unit 220 of the handle unit 200 according to an additional embodiment of the present disclosure. For reference, (a) to (c) of FIG. 4 are exemplary views of the drive switch unit 220 according to an embodiment of the present disclosure viewed from an upward direction.

The drive switch unit 220 according to an additional embodiment of the present disclosure may be formed to extend along the width direction of the handle unit 200 to have a predetermined length. The drive switch unit 220 may be configured to tilt within a predetermined angular range in the forward and backward directions based on the center in the longitudinal direction according to the position of the action point of the pressing operation.

That is, the driving switch unit 220 according to the additional embodiment of the present disclosure, as described above, may be configured to move by a predetermined distance and elastically return according to the pressing operation, as well as the location of the action point of the pressing operation. It may be configured to be tilted freely within a predetermined angular range according to, and may be configured to elastically return to the original position after being tilted.

In addition, the drive switch unit 220 according to an additional embodiment of the present disclosure includes the first front wheel 400-a provided on one side (left side) of the transport unit 100 in the width direction according to the tilt angle and the second front wheel 400-a. 1 generates an angular speed difference between the rear wheel 500-a and the second front wheel 400-b and the second rear wheel 500-b provided on the other side (right side) of the transport unit 100 in the width direction It may be further configured to generate an actuation signal to cause.

In addition, the drive unit 700 according to an additional embodiment of the present disclosure includes a first front wheel (left side) provided on one side (left side) of the transport unit 100 in the width direction according to an operation signal generated by the drive switch unit 220. 400-a) and between the first rear wheel 500-a and the second front wheel 400-b and the second rear wheel 500-b provided on the other side (right side) of the transport unit 100 in the width direction It may be configured to control the front wheel 400 and the rear wheel 500 to generate an angular speed difference.

That is, the drive switch unit 220 according to an additional embodiment of the present disclosure, when one side in the longitudinal direction is pressed and tilted, the first front wheel 400-a provided on the left side of the transport unit 100 and the first Driving unit 700 such that the angular speed of the rear wheel 500-a is greater than the angular speed of the second front wheel 400-b and the second rear wheel 500-b provided on the right side of the transport unit 100 can control.

Similarly, the drive switch unit 220 according to an additional embodiment of the present disclosure, when the other side in the longitudinal direction is pressed and tilted, the second front wheel 400-b provided on the right side of the transport unit 100 and the second Driving unit 700 such that the angular speed of the rear wheel 500-b is greater than the angular speed of the first front wheel 400-a and the first rear wheel 500-a provided on the left side of the carrying unit 100 can control.

Accordingly, the electric assist conveying device 10 according to an embodiment of the present disclosure can easily move in one of a straight direction, a right turn direction, and a left turn direction according to the user's pressing motion and the position of the pressing point.

As shown in (a) of FIG. 3, when no force is applied to the drive switch unit 220 according to an additional embodiment of the present disclosure, the drive unit 700 does not provide any power, so the front wheel 400 and the rear wheel 500 may maintain a free rotational state.

As shown in (b) of FIG. 3, when the other longitudinal side of the drive switch unit 220 according to a further embodiment of the present disclosure is pressed, the drive unit 700 is located on the right side of the transport unit 100. The angular velocities of the second front wheel 400-b and the second rear wheel 500-b are determined by the first front wheel 400-a and the first rear wheel 500-b located on the left side of the carrying unit 100. By driving at a higher angular speed than a), the electric assist conveying device 10 can be made to move naturally in the left turning direction.

As shown in (c) of FIG. 3, when one side in the longitudinal direction of the drive switch unit 220 according to an additional embodiment of the present disclosure is pressed, the drive unit 700 is located on the left side of the transport unit 100. The angular speed of the first front wheel 400-a and the first rear wheel 500-a is applied to the second front wheel 400-b and the second rear wheel 500-b located on the right side of the transport unit 100. By driving at a higher angular speed than the angular speed of b), the electric assist conveying device 10 can be made to naturally move in the right turning direction.

5 is a schematic perspective view for explaining a driving unit 700 according to an embodiment of the present disclosure.

The drive unit 700 according to an embodiment of the present disclosure includes a wheel rotation center axis 710, an inside circular plate 720, an outside circular plate 730, an electric motor 740, and a coupling structure 750. can include

First, the wheel rotation center axis 710 according to an embodiment of the present disclosure may be configured such that a spline is formed on an outer circumferential surface so that one end is inserted into the rotation center of the front wheel 400 and fixed. That is, the wheel rotation center axis 710 according to an embodiment of the present disclosure is a rod shape having a predetermined length, and a spline for engagement in the longitudinal direction may be formed on the outer circumferential surface, and one end is connected to the front wheel 400. By being coupled and the other end being coupled to the inside circular plate 720, rotational force can be transmitted between the front wheel 400 and the inside circular plate 720.

In the inside circular plate 720 according to an embodiment of the present disclosure, a boss coupled with a spline formed at the other end of the wheel rotation center axis 710 may be formed on an inner surface. That is, the inside circular plate 720 according to an embodiment of the present disclosure has a ring shape, and a boss for engaging with the spline of the wheel rotation center axis 710 is formed on the inner surface, thereby forming a ring shape, thereby forming a wheel rotation center axis 710 and It is possible to implement mutual torque transmission of

Subsequently, the outside circular plate 730 according to an embodiment of the present disclosure may be configured such that the outer circumferential surface of the inside circular plate 720 is interpolated and slipped. The inside circular plate 720 according to an embodiment of the present disclosure may have a ring shape, and an inner circumferential surface corresponding to an outer circumferential surface of the inside circular plate 720 may be formed to accommodate the inside circular plate 720 therein. .

For reference, the wheel rotation center axis 710, the inside circular plate 720, the outside circular plate 730, the electric motor 740, and the coupling structure 750 shown in FIG. 5 are the first front wheel ( 400-a) and the second front wheel 400-b, respectively, may be provided with a total of two.

6 and 7 are schematic side views for explaining an operating principle according to a coupling relationship between an inside circular plate 720 and an outside circular plate 730 according to an embodiment of the present disclosure.

In the outer circular plate 730 according to an embodiment of the present disclosure, at least one intaglio receiving hole 731 having a width tapering in one direction may be formed on an inner surface thereof.

In addition, inside the intaglio receiving hole 731 according to an embodiment of the present disclosure, an elastic body 732 bent to correspond to the shape of the intaglio receiving hole 731 and the intaglio accommodation by elasticity of the elastic body 732 A cylindrical pin member 733 pressed in the short width direction of the ball 731 may be accommodated.

That is, according to one embodiment of the present disclosure, a plurality of intaglio accommodating holes may be arranged in a radial direction with respect to the center of rotation on the inner surface of the outside circular plate 730, and the inner circular plate 720 and the inside contact with the inner circular plate 720. It may have this open groove structure. In addition, in the intaglio receiving hole 731 according to an embodiment of the present disclosure, the width formed when the outside circular plate 730 is combined with the inside circular plate 720 is tapered (ie, formed obliquely), so that one side is It may have a wider width (long width) than the other side, and the other side may have a narrower width (short width) than one side.

Accordingly, as shown in FIG. 6, when the outside circular plate 730 according to an embodiment of the present disclosure rotates in one direction (for reference, counterclockwise in FIG. 6), the pin member 733 The rotational force of the outside circular plate 730 may be transmitted to the inside circular plate 720 by pressing the outer circumferential surface of the inside circular plate 720 located in the short width direction of the intaglio receiving hole 731 .

That is, the pin member 733 according to an embodiment of the present disclosure is sandwiched between one surface of the intaglio receiving hole 731 and the outer circumferential surface of the inside circular plate 720 when positioned in the short width direction of the intaglio receiving hole 731. By maximizing the gripping force between the outside circular plate 730 and the inside circular plate 720, transmission of rotational force can be easily implemented.

In addition, as shown in FIG. 7 , when the inside circular plate 720 according to an embodiment of the present disclosure rotates in another direction (for reference, clockwise in FIG. 7 ), the pin member 733 rotates the elastic body 732 ) is compressed and positioned in the long width direction of the intaglio receiving hole 731 to block transmission of rotational force between the inside circular plate 720 and the outside circular plate 730.

That is, the pin member 733 according to an embodiment of the present disclosure disappears the gripping force between the inside circular plate 720 and the outside circular plate 730 when located in the long width direction of the intaglio receiving hole 731, so that the outer side Inside the circular plate 730, the inside circular plate 720 can be made to rotate freely.

In other words, when the user pulls the electric assist conveying device 10 in the opposite direction to the pressing direction, the driving unit 700 according to an embodiment of the present disclosure rotates the front wheel 400 in the other direction so that the inside circular plate 720 can rotate together in the other direction (for reference, clockwise in FIG. 7), and the pin member 733 located in the hem width direction of the intaglio receiving hole 731 by the elastic body 732 is an inside circular plate The rolling movement by the rotation of the 720 in the other direction and at the same time, it bounces out of the contact point with the stationary outer circular plate 730, compresses the elastic body 732, and can be located in the long width direction of the intaglio receiving hole 731 there is.

That is, the rotational force of the inside circular plate 720 in the other direction (for reference, clockwise in FIG. 7 ) according to an embodiment of the present disclosure and the stopping force of the outside circular plate 730 in a stopped state Due to the difference in the direction of the force, a repulsive force may be generated in one direction (for reference, counterclockwise in FIG. 7) with respect to the pin member 733, and the generated repulsive force causes the pin member 733 to hold for a predetermined time. By compressing the elastic body 732, it can be guided in the long width direction of the intaglio receiving hole 731.

Referring back to FIG. 5 , the electric motor 740 according to an embodiment of the present disclosure may be configured to provide power for rotating the outside circular plate 730 in one direction. That is, the electric motor 740 according to an embodiment of the present disclosure may rotate the shaft to rotate the coupled coupling structure 750 and the outside circular plate 730 in the axial direction of the shaft, and also drive It is communicatively connected to the switch unit 220 and rotational force, rotational speed, etc. may be adjusted according to an operation signal of the drive switch unit 220 .

In addition, the coupling structure 750 according to an embodiment of the present disclosure may be configured to transfer the rotational force of the shaft of the electric motor 740 to the outer circular plate 730. That is, in the coupling structure 750 according to an embodiment of the present disclosure, one side is coupled to the outside circular plate 730 and the other side is coupled to the shaft of the electric motor 740, thereby reducing the rotational force of the electric motor 740. It can be easily converted into the rotational force of the outside circular plate 730.

By implementing the coupling structure between the inside circular plate 720 and the outside circular plate 730 as described above in the drive unit 700 according to an embodiment of the present disclosure, the user can move in one direction through the handle unit 200. When the pressing operation is performed, the electric motor 740 operates to rotate the outside circular plate 730, and accordingly, the cylindrical pin member 733 is positioned in the short width direction of the intaglio receiving hole 731 to rotate the inside circular plate. 720 can also rotate together, and finally, as the front wheel 400 rotates, the electric assist conveying device 10 can more easily move in the pressing direction.

In addition, when the user pulls the electric assist conveying device 10 opposite to the pressing direction, the front wheel 400 rotates in the pulling direction (ie, the reverse direction) and at the same time, the inside circular plate connected to the front wheel 400 ( 720) can also rotate in the reverse direction, and accordingly, a difference in rotational direction occurs between the inside circular plate 720 and the outside circular plate 730, so that the cylindrical pin member 733 compresses the elastic body 732 and It may be induced in the long width direction of the intaglio receiving hole 731.

As a result, when the user pulls the electric assist conveying device 10, the electric motor 740 does not operate and the inside circular plate 720 freely rotates inside the outside circular plate 730, so that the electric motor 740 ) can be prevented from occurring due to reverse driving, and problems such as shortening the life of the electric motor 740 due to reverse power transmission and wear of related components can be solved, and at the same time, It is possible to realize carrying force supporting through the power of the electric motor 740.

8 is a schematic operating state diagram for explaining the slider member 300 according to an embodiment of the present disclosure.

The electric assist conveying device 10 according to an embodiment of the present disclosure may include slider members 300 coupled to outer surfaces of both sides of the accommodating area 110 .

That is, one slider member 300 according to an embodiment of the present disclosure may be additionally provided on both sides of the outer surface of the lower region forming the accommodating area 110 of the transport unit 100, and may also be provided on the transport unit 100. It may be configured to be detachably coupled in (100).

As an example, the slider member 300 according to an embodiment of the present disclosure may have a length corresponding to the longitudinal direction of the accommodation area 110, be fastened to the outside of the accommodation area 110, and be made of a metal material. However, in order to reduce weight and enhance durability, 'X'-shaped support structures may have a shape in which they are continuously arranged.

In addition, the height of the slider member 300 according to an embodiment of the present disclosure is set between the height of the ground contact of the front wheel 400 and the rear wheel 500 and the height of the bottom surface of the transport unit 100 can be characterized.

That is, the slider member 300 according to an embodiment of the present disclosure is between the lowest heights of the front wheels 400 and the rear wheels 500 and the bottom height of the transport unit 100 forming the accommodation area 110. The lower surface of the slider member 300 may be configured to be disposed on. Through this, when the electric assist transport device 10 passes through a step, stairs, or the like, or is loaded on a vehicle, damage to the transport unit 100 is prevented and the front wheel 400 more easily climbs a step having a predetermined height. can make it pass.

As shown in (a) of FIG. 8 , when the slider member 300 according to an embodiment of the present disclosure is not provided in the electric assist conveying device 10, the electric assist conveying device 10 has a handle portion 200 ) When being pulled in the direction of carrying, since the front wheel 400 is caught on a step, etc., a problem arises in that the entire carrying unit 100 must be lifted and moved.

On the other hand, as shown in (b) of FIG. 8 , when the slider member 300 according to an embodiment of the present disclosure is provided in the electric assist conveying device 10, the electric assist conveying device 10 has a handle portion ( 200) When being pulled in the direction of the provision, not only can the step or the like come in contact with the slider member 300 to prevent damage to the carrying unit 100, but also the ground where the slider member 300 forms the step and the bottom of the front wheel 400. By minimizing the distance between side points, the electric assist conveying device 10 can more easily pass through a step or the like.

9 is an exemplary diagram for explaining a detailed configuration of a slider member 300 according to an additional embodiment of the present disclosure.

As shown in the partially enlarged view of FIG. 9 , the bottom area of the slider member 300 according to an additional embodiment of the present disclosure may be implemented in a layered structure. More specifically, the slider member 300 according to an additional embodiment of the present disclosure includes a body-forming layer 310 made of plastic or metal, an adhesive layer 320 formed by applying to one surface of the body-forming layer 310, and an adhesive layer. It may include a synthetic resin layer 330 that faces the body forming layer 310 through 320 and a coating layer 340 formed by being attached to one surface of the synthetic resin layer 330.

The synthetic resin layer 330 according to an embodiment of the present disclosure may be made of PVC or PET material. In addition, the coating layer 340 according to an embodiment of the present disclosure may be made of an abrasion-resistant reinforcing material that prevents scratches due to friction with the ground, and a sticker film method to be detachably coupled to the synthetic resin layer 330 can be implemented as

Accordingly, the slider member 300 according to an embodiment of the present disclosure can prevent damage to the transport unit 100 itself by easily exchanging and managing the coating layer 340 implemented in the form of a sticker film, The life of the slider member 300 may be extended.

10 is a schematic illustration for explaining the gripping part 120 according to an embodiment of the present disclosure.

As described above, in the carrying unit 100 according to an embodiment of the present disclosure, at least a portion of one side may be opened to form the holding unit 120 . In addition, in the handle part 200 according to an embodiment of the present disclosure, the connection end 210 is hinged to both sides of the gripping part 120 formed on one side of the carrying part 100, and the handle part 200 is hinged within a predetermined angle range. It can be configured to be able to rotate.

Accordingly, as shown in FIG. 10 , in the electric assist conveying device 10 according to an embodiment of the present disclosure, the user rotates the handle part 200 in a direction in contact with one surface of the accommodation area 110 to accommodate it. After being seated inside the region 110 , the electric assist conveying device 10 can be more easily lifted and loaded into a vehicle through the gripping portion 120 .

In addition, an exemplary electric assist transport device 10 may be manufactured with a weight of about 12 kg, the power supply unit 600 may be implemented with a 7.2V small battery, and a separate 12V to 24V vehicle charger. It may be possible to charge while driving the vehicle.

As described above, according to the embodiments of the present disclosure, additional power is supported when the transport object is loaded and moved so that the transport object can be moved more easily, thereby preventing musculoskeletal disorders of delivery workers and improving work efficiency. Through the improvement of the quality of life of the courier service workers can be promoted.

In addition, according to embodiments of the present disclosure, power transmission can be easily and automatically cut off even at a moment when the supported power is not needed.

In addition, according to embodiments of the present disclosure, when passing through stairs, steps, or the like or loading onto a vehicle, a wheel provided can more easily pass through a step having a predetermined height.

As described above, the optimal embodiment has been disclosed in the drawings and specifications. Although specific terms have been used herein, they are only used for the purpose of describing the present invention and are not used to limit the scope of the present invention described in the claims or defining the meaning. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: electric assist transport device
100: transport unit
110: Reception area
120: gripping unit
200: handle part
210: connecting end
220: drive switch unit
300: slider member
310: body formation layer
320: adhesive layer
330: synthetic resin layer
340: coating layer
400: front wheel
500: rear wheel
600: power supply unit
700: driving unit
710: wheel rotation center axis
720: inside circular plate
730: outside circular plate
731: intaglio hole
732: elastic body
733: pin member
740: electric motor
750: coupling structure

Claims (3)

In the electric assist conveying device,
a carrying unit in which at least a partial area is recessed to form an accommodation area for an object to be transported and at least a partial area on one side is opened to form a gripping portion;
a handle part configured to be rotated within a predetermined angular range with respect to a connection end connected to one side of the carrying unit and to be seated in the accommodation area by being rotated in a direction in contact with one surface of the accommodation area;
Front wheels provided on both sides of the front of the carrying unit and configured to rotate freely;
rear wheels provided on both sides of the rear of the carrying unit and configured to rotate freely;
a driving unit connected to the front wheel and configured to provide rotational force to the front wheel;
a power supply unit configured to supply power to the driving unit; and
Slider members coupled to both outer surfaces of the receiving area
including,
the handle part,
A driving switch unit configured to be communicatively connected to the driving unit and receive a pressing operation in one direction as a trigger signal for the operation of the driving unit
including,
the driving unit,
Further configured to provide rotational force in one direction to the front wheel according to an operation signal of the drive switch unit receiving the trigger signal,
The height of the bottom surface of the slider member is characterized in that it is positioned between the height of the ground contact of the front wheel and the rear wheel and the height of the bottom surface of the carrying unit,
the driving unit,
a wheel rotation center shaft having a spline formed on an outer circumferential surface and having one end inserted into and fixed to the rotation center of the front wheel;
an inside circular plate having a boss coupled to the spline formed at the other end of the wheel rotation center axis formed on an inner surface of the plate;
an outside circular plate configured such that an outer circumferential surface of the inside circular plate is interpolated and slipped;
an electric motor configured to provide power for rotating the outer circular plate in one direction; and
A coupling structure configured to transmit the rotational force of the electric motor to the outer circular plate
including,
The outside circular plate,
At least one intaglio receiving hole having a width tapering in one direction is formed on the inner surface,
Inside the intaglio receiving hole, an elastic body bent to correspond to the shape of the intaglio receiving hole; and a cylindrical pin member that is pressed in the short width direction of the intaglio receiving hole by the elasticity of the elastic body is accommodated.
When the outside circular plate rotates in one direction, the pin member is located in the short width direction of the intaglio receiving hole and presses the outer circumferential surface of the inside circular plate to transfer the rotational force of the outside circular plate to the inside circular plate, ,
When the inside circular plate rotates in the other direction, the pin member compresses the elastic body and is located in the long width direction of the intaglio receiving hole to block transmission of rotational force between the inside circular plate and the outside circular plate. Characterized in that ,
Electric assisted conveying device. delete In the electric assist conveying device,
a carrying unit in which at least a partial area is recessed to form an accommodation area for an object to be transported and at least a partial area on one side is opened to form a gripping portion;
a handle part configured to be rotated within a predetermined angular range with respect to a connection end connected to one side of the carrying unit and to be seated in the accommodation area by being rotated in a direction in contact with one surface of the accommodation area;
Front wheels provided on both sides of the front of the carrying unit and configured to rotate freely;
rear wheels provided on both sides of the rear of the carrying unit and configured to rotate freely;
a driving unit connected to the front wheel and configured to provide rotational force to the front wheel;
a power supply unit configured to supply power to the driving unit; and
Slider members coupled to both outer surfaces of the receiving area
including,
the handle part,
A driving switch unit configured to be communicatively connected to the driving unit and receive a pressing operation in one direction as a trigger signal for the operation of the driving unit
including,
the driving unit,
Further configured to provide rotational force in one direction to the front wheel according to an operation signal of the drive switch unit receiving the trigger signal,
The height of the bottom surface of the slider member is characterized in that it is positioned between the height of the ground contact of the front wheel and the rear wheel and the height of the bottom surface of the carrying unit,
The front wheel and the rear wheel,
It is divided into a first front wheel and a first rear wheel provided on one side in the width direction of the transport unit and a second front wheel and a second rear wheel provided on the other side in the width direction of the transport unit,
The drive switch unit,
It is configured to be tiltable within a predetermined angular range in the front-rear direction based on the center in the longitudinal direction according to the position of the point of action of the pressing operation,
Depending on the tilt angle, an operating signal generating an angular speed difference between the first front wheel and the first rear wheel provided on one side and the second front wheel and the second rear wheel provided on the other side To generate an operating signal consisting of,
Electric assisted conveying device.

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