JP7650220B2 - Portable power supply device - Google Patents

Description

Article 30, paragraph 2 of the Patent Act applies (1) Published on the company's website on May 31, 2021 https://www. nichicon. co. jp/new/pdfs/release_20210531a.pdf (2) Published in the company's product catalog on June 17, 2021 (3) Published on the company's website on August 19, 2021 https://www. nichicon. co. jp/products/v21/ (4) Published at the exhibition (3rd International Livestock Materials EXPO) on October 13, 2021 (5) Published at the web exhibition (CEATEC 2021 ONLINE) on October 18, 2021 https://online. ceatec.com/booth/2628 (6) Released on a video ad distribution site on October 4, 2021 https://www.news-tv.jp/_ct/16960816 (7) Released on a video sharing site on October 11, 2021 https://www.youtube.com/watch?v=YT80sO68u9c (8) Sold to the shipping destinations listed in the shipping information list from August 30, 2021 to October 21, 2021

The present invention relates to a portable power supply device that supplies AC power.

One advantage of electric vehicles (including PHEVs) and fuel cell vehicles is that they can be used as DC power sources. A portable power supply device that converts the DC power output by these vehicles into AC power and supplies the AC power to power consumption devices is known, for example, as described in Patent Document 1.

As shown in Fig. 9, the portable power supply device 101 of Patent Document 1 includes a trunk box 120 that houses an inverter (not shown). When the portable power supply device 101 is in use, the trunk box 120 takes a placed position in which the bottom surface 120F of the trunk box 120 faces the road surface G, as shown in Fig. 9(A). When the portable power supply device 101 is transported, the trunk box 120 takes a transportable position in which the wheels 126 are in contact with the road surface G and can roll, as shown in Fig. 9(B).

JP 2018-148665 A

However, in the configuration of Patent Document 1, when switching the trunk box 120 from the placed position shown in FIG. 9(A) to the portable position shown in FIG. 9(B), it is necessary to lift the trunk box 120 placed on the road surface G, which poses a problem in that a large force is required to switch to the portable position.

The present invention was made in consideration of the above circumstances, and aims to provide a portable power supply device that can reduce the force required to switch to a portable position.

In order to solve the above problems, the portable power supply device of the present invention comprises a power supply connector connected to an external DC power source, an inverter that converts DC power input from the power supply connector into AC power, an outlet that outputs the AC power output from the inverter, an operating unit for operating the inverter, and a trolley case that stores the inverter, the trolley case comprising legs and wheels capable of supporting the trolley case, and a handle that is grasped when transporting the trolley case, and the trolley case comprises: (1) the legs and the wheels (1) When the trolley case is in the upright position, the legs are released from the road surface and the wheels are in contact with the road surface to support the trolley case, thereby taking an upright position against the road surface; (2) When the trolley case is in the upright position, the handle is pulled, causing the legs to separate from the road surface and the wheels to take a rollable portable position while still in contact with the road surface; when the trolley case is in the upright position, the power supply connector and the DC power source can be connected when the trolley case is closed, the handle is positioned above the wheels, and the operating unit is positioned on the top surface of the trolley case.

According to the above configuration, the trolley case assumes a portable position by pulling the handle located above the wheels when the trolley case is in an upright position, so that the trolley case can be easily switched from an upright position to a portable position without lifting it, and the force required to switch to the portable position can be reduced. In addition, according to the above configuration, the operating unit is located on the top surface of the trolley case in an upright position, so that the ease of operating the operating unit from above the trolley case can be improved compared to a configuration in which the operating unit is located at the bottom of the side of the trolley case, for example.

It is also preferable that the operating unit is configured to be located at the end of the top surface of the trolley case and at the upper part of the side surface of the trolley case. This configuration can improve the ease of operating the operating unit from the side of the trolley case.

It is also preferable that the handle is configured to be retractable from the trolley case. With this configuration, when the trolley case is in an upright position, the handle can be raised by pulling it upward, and the force required to tilt the trolley case is reduced, thereby reducing the force required to switch to the portable position.

The trolley case is preferably provided with a plurality of wheels spaced apart in the left-right direction, which is a predetermined linear direction, the legs and the wheels are spaced apart from each other in the front-rear direction, which is a linear direction perpendicular to the left-right direction, and the dimensions of the trolley case in the up-down direction perpendicular to both the front-rear direction and the left-right direction are greater than the dimensions of the trolley case in the front-rear direction and smaller than the dimensions of the trolley case in the left-right direction. This configuration makes it possible to improve the stability of the trolley case, as well as improve the ease of gripping the handle and the ease of operating the operating part.

The present invention provides a portable power supply device that requires less force to switch to a portable position.

1 is a schematic configuration diagram of a portable power supply device according to an embodiment of the present invention; FIG. 1 is a perspective view showing the appearance of a portable power supply device according to an embodiment of the present invention, with the trolley case in a closed state. 1A and 1B are external views of a portable power supply device according to the embodiment, in which FIG. 3A and 3B are external views of the portable power supply device according to the embodiment, in which FIG. 3A is a right side view and FIG. 4A and 4B are external views of the portable power supply device according to the embodiment, in which FIG. FIG. 2 is a perspective view showing the trolley case according to the embodiment in an open state. FIG. 2 is a plan view showing the trolley case according to the embodiment in an open state. 13A and 13B are explanatory diagrams showing a transport process of the portable power supply device according to the embodiment. 13A and 13B are explanatory diagrams showing a transport process of a conventional portable power supply device.

The portable power supply device 1 (hereinafter referred to as "power supply device 1") of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the general configuration of the power supply device 1, and FIGS. 2 to 5 are external views of the power supply device 1.

As shown in FIG. 1, the power supply device 1 includes an input connector 11, an inverter 12, an output connector 13, a startup power connector 14, a control unit 15, a display unit 16, and an operation unit 17. The power supply device 1 converts DC power input from an external DC power source P into AC power and supplies the AC power to a power consumption device C.

The input connector 11 is a connector for connecting the DC power source P and the inverter 12, and in this embodiment, is configured with a power supply connector 42 (see FIG. 6) described later. The inverter 12 is a circuit that converts DC power input from the input connector 11 into desired AC power. The output connector 13 is a connector for connecting the power consumption device C and the inverter 12, and in this embodiment, is configured with a socket 44 (see FIG. 6) described later. The startup power connector 14 is a connector for connecting the DC power source P and the control unit 15, and in this embodiment, is configured with a socket 45 (see FIG. 6) described later.

The control unit 15 is a circuit that drives the inverter 12 and controls the inverter 12 based on the user's operation of the operation unit 17. The display unit 16 is configured to display the operating state of the inverter 12, and in this embodiment is configured with a light-emitting lamp 34 (see FIG. 2) described later. The operation unit 17 is configured with an operation switch for operating the operation of the inverter 12, and is operated by the user. In this embodiment, the power supply device 1 has a plurality of operation units 17, including a start button 31 (see FIG. 2), a stop button 32 (see FIG. 2), an emergency stop button 33 (see FIG. 4(B)), and a frequency switching button 46 (see FIG. 6) described later.

Figure 2 is a perspective view of the power supply device 1. The forward/backward direction X, left/right direction Y, and up/down direction Z indicated by arrows in the figure are linear directions that are perpendicular to each other. Therefore, when the forward/backward direction X and the left/right direction Y are horizontal directions, the up/down direction Z is a vertical direction.

As shown in FIG. 2, the power supply device 1 includes a portable trolley case 20 that houses the inverter 12 and other components. The trolley case 20 includes a case body 21, a lid 22, a hinge mechanism 23 (see FIG. 3), a locking mechanism 24, legs 25, wheels 26, and handles 27 and 28. The trolley case 20 is configured to be switchable between a closed state in which the trolley case 20 is closed and an open state in which the trolley case 20 is open.

When the trolley case 20 is in the closed state, the case body 21 and the lid 22 abut against each other, and the space behind the lid, which will be described later, is closed by the inner wall member 41 (see FIG. 6) and the lid 22, which will be described later. When the trolley case 20 is in the open state, the case body 21 and the lid 22 are separated from each other, the inner wall member 41 faces the external space of the trolley case 20, and the space behind the lid is open.

Figures 3 to 5 are six-sided views of the power supply device 1, showing the trolley case 20 in a closed state, the handle 27 not pulled out, and the handle 28 not raised.

As shown in Figures 3 to 5, the trolley case 20 is formed in a substantially rectangular parallelepiped shape and has a front surface 20A, a rear surface 20B, a right side surface 20C, a left side surface 20D, a top surface 20E, and a bottom surface 20F. When the trolley case 20 is closed and the handle 27 is not pulled out, the dimension of the trolley case 20 in the up-down direction Z is larger than the dimension of the trolley case 20 in the front-rear direction X, and smaller than the dimension of the trolley case 20 in the left-right direction Y.

The trolley case 20 also has openings that connect the external space of the trolley case 20 with the space behind the lid, including a first inlet 20G (see FIG. 4B) through which the power supply cable 43 (see FIG. 6) and the startup power cable (not shown) pass, and a second inlet 20H (see FIG. 4A) through which the power cable (not shown) connected to the outlet 44 (see FIG. 6) passes.

The first inlet 20G is provided on the left side surface 20D of the trolley case 20, and is configured so that when the trolley case 20 is in an upright position, the power supply connector 42 (see FIG. 6) can be connected to the DC power source P when the trolley case 20 is in the closed state. That is, by passing the power supply cable 43 through the first inlet 20G, the trolley case 20 can be switched from the open state to the closed state with the power supply connector 42 connected to the DC power source P. Also, by passing the start-up power cable (not shown) through the first inlet 20G, the trolley case 20 can be switched from the open state to the closed state with the DC power source P connected to the socket 45 (see FIG. 6).

The second inlet 20H is provided on the right side surface 20C of the trolley case 20, and is configured so that when the trolley case 20 is in an upright position, the outlet 44 (see FIG. 6) can be connected to the power consuming device C when the trolley case 20 is in a closed state. In other words, by passing a power cable connected to the power consuming device C through the second inlet 20H, the trolley case 20 can be switched from an open state to a closed state with the power consuming device C connected to the outlet 44.

The case body 21 has an inverter storage space (not shown) for storing the inverter 12 and the control unit 15. The case body 21 constitutes the entire rear surface 20B of the trolley case 20, as well as the right side surface 20C, the left side surface 20D, the top surface 20E, and the bottom surface 20F. The case body 21 has a corner surface 21A as an outer surface on which a start button 31 and a stop button 32, which will be described later, are provided. The corner surface 21A faces upward to the upper right, and is both the top surface 20E and the right side surface 20C of the trolley case 20.

The lid 22 is provided in front of the case body 21 and constitutes the entire front surface 20A of the trolley case 20. The lid 22 is provided so as to be rotatable about an axis parallel to the left-right direction Y provided at the lower end of the trolley case 20. The lid 22 has a back surface 22A (see FIG. 6) that forms a space behind the lid. The back surface 22A of the lid 22 faces an inner wall member 41 (see FIG. 6) described later when the trolley case 20 is in a closed state, and is configured to face upward when the trolley case 20 is in an upright position when the trolley case 20 is in an open state.

The hinge mechanism 23 is provided at the lower ends of the case body 21 and the lid 22, and is disposed on the underside 20F of the trolley case 20. The hinge mechanism 23 connects the case body 21 and the lid 22, and supports the lid 22 so that it can rotate relative to the case body 21.

The locking mechanism 24 is provided at the upper end of the case body 21 and is disposed on the upper surface 20E of the trolley case 20. The locking mechanism 24 is configured to be able to restrict the rotation of the lid 22 relative to the case body 21. The locking mechanism 24 switches between a locked state that restricts the opening of the trolley case 20 and an unlocked state that does not restrict the opening of the trolley case 20.

The legs 25 are provided at the lower end of the case body 21 and are disposed at the front end of the lower surface 20F of the trolley case 20. The legs 25 support the trolley case 20 by contacting the road surface G (see FIG. 8). In this embodiment, the legs 25 are provided integrally with the lower end of the case body 21, and the two legs 25 are provided with a gap between them in the left-right direction Y.

The multiple wheels 26 are provided at the lower end of the case body 21 and are arranged at the rear end of the underside 20F of the trolley case 20. The legs 25 and the wheels 26 are arranged at intervals from each other in the front-rear direction X, and the wheels 26 support the trolley case 20 by contacting the road surface G (see FIG. 8) together with the legs 25. The wheels 26 are arranged rotatable about an axis parallel to the left-right direction Y. In this embodiment, the wheels 26 are provided at the right and left ends of the case body 21, so that the two wheels 26 are arranged at an interval in the left-right direction Y.

The handle 27 is configured to be retractable from the trolley case 20 and is grasped when transporting the trolley case 20 without lifting it. The handle 27 is provided on the case body 21 and is arranged at the rear end of the top surface 20E of the trolley case 20, so that it is arranged above the wheels 26 when the trolley case 20 is in an upright position. In this embodiment, the handle 27 is connected to an extendable rod 27A (see Figures 5(A) and 8) arranged on the rear surface 20B of the trolley case 20, and is configured to be switchable between a state where the handle 27 is pulled out from the trolley case 20 and a state where the handle 27 is not pulled out from the trolley case 20 by extending and retracting the extendable rod 27A in the vertical direction Z.

The handle 28 is grasped when lifting and transporting the trolley case 20. The handle 28 is provided on the case body 21 and is located in the center of the top surface 20E of the trolley case 20. The handle 28 is configured to be rotatable around an axis parallel to the left-right direction Y.

The power supply device 1 also includes a start button 31, a stop button 32, an emergency stop button 33, multiple light-emitting lamps 34, and ventilation holes 35 and 36, which are provided on the outer surface of the trolley case 20.

The start button 31 and the stop button 32 are provided on the case body 21, and are configured to be located on the upper surface 20E of the trolley case 20 when the trolley case 20 is in an upright position. In this embodiment, the start button 31 and the stop button 32 are provided on the corner surface 21A of the case body 21, and are configured to be located at the end of the upper surface 20E of the trolley case 20 and at the upper part of the right side surface 20C of the trolley case 20. The start button 31 and the stop button 32 are configured as push button switches. The start button 31 is an operation unit 17 for starting the conversion and output of electric power, and is configured so that when the start button 31 is operated, the control unit 15 starts the conversion of electric power in the inverter 12 and the output side connector 13 starts the output of electric power. The stop button 32 is an operation unit 17 for stopping the conversion and output of electric power, and is configured so that when the stop button 32 is operated, the control unit 15 stops the conversion of electric power in the inverter 12 and the output side connector 13 stops the output of electric power.

The emergency stop button 33 is provided on the case body 21 and is located at the top of the left side surface 20D of the trolley case 20. The emergency stop button 33 is configured as a push button switch. The emergency stop button 33 is an operation unit 17 for forcibly stopping the conversion and output of power, and is configured so that when the emergency stop button 33 is operated, the control unit 15 forcibly stops the conversion of power in the inverter 12 and the output side connector 13 stops the output of power. The emergency stop button 33 is protected by a button cover 33A to prevent it from being operated unintentionally.

The multiple light-emitting lamps 34 are provided on the case body 21, similar to the start button 31 and the stop button 32. That is, the light-emitting lamps 34 are provided on the corner surface 21A of the case body 21. The light-emitting lamps 34 are the display unit 16 that displays the operating state of the inverter 12 by emitting light.

The vents 35 and 36 are provided in the case body 21 and communicate the internal space of the case body 21 (i.e., the inverter storage space) with the external space. The vent 35 is located on the left side surface 20D of the trolley case 20 and is configured as an exhaust port that exhausts air from the inside of the trolley case 20 to the outside. The vent 36 is located on the rear surface 20B and the bottom surface 20F of the trolley case 20 and is configured as an intake port that draws air from the outside to the inside of the trolley case 20. A fan (not shown) is provided in the internal space of the case body 21 to draw air through the vent 36 and exhaust the air through the vent 35.

Figures 6 and 7 show the trolley case 20 in an open state when the trolley case 20 is in an upright position. The trolley case 20 can be switched from a closed state to an open state by unlocking the locking mechanism 24 and tilting the lid 22 forward.

As shown in Figures 6 and 7, the power supply device 1 is configured to be stored in the trolley case 20 and includes an inner wall member 41, a power supply connector 42, a power supply cable 43, multiple outlets 44, a socket 45, a frequency switching button 46, and a cushioning material 47.

The inner wall member 41 is provided on the case body 21 and separates the inverter storage space, which is the internal space of the case body 21, from the external space of the case body 21. The inner wall member 41 is provided with an outlet 44, a socket 45, and a frequency switching button 46 that face the space behind the lid when the trolley case 20 is closed.

The power supply connector 42 is an input connector 11 that is connected to an electric vehicle or a fuel cell vehicle, and is connected to a battery serving as a DC power source P provided in the electric vehicle or fuel cell vehicle, making it possible to extract power from the battery (DC power source P). The power supply connector 42 is configured to be able to be stored in a specified position in the space behind the lid when the trolley case 20 is in a closed state.

The power supply cable 43 is a flexible electric wire that connects the power supply connector 42 and the inverter 12. The power supply cable 43 is configured to protrude horizontally from the inner wall member 41 when the trolley case 20 is in an upright position. In this embodiment, the power supply cable 43 is configured to protrude to the left from the inner wall member 41. The power supply cable 43 is configured to be able to be wound and stored in the space behind the lid when the trolley case 20 is in a closed state.

The outlet 44 is the output connector 13 to which the power consumption device C is connected, and is connected to the power consumption device C via the power cable by inserting a power plug (not shown) provided at one end of the power cable. The outlet 44 outputs the AC power output from the inverter 12 (i.e., the AC power generated by the inverter 12).

The socket 45 is a startup power connector 14 that is connected to an electric vehicle or a fuel cell vehicle, and is connected to a battery serving as a DC power source P provided in the electric vehicle or fuel cell vehicle, making it possible to extract power from the battery (DC power source P) to start the operation of the inverter 12. The socket 45 is connected to the DC power source P via a startup power cable (not shown) that is connected to a 12V output accessory socket provided in the electric vehicle or fuel cell vehicle. Note that if the electric vehicle or fuel cell vehicle is capable of outputting startup power through the power supply connector 42, it is not necessary to use the startup power cable.

The frequency switching button 46 is configured as a rocker switch. The frequency switching button 46 is an operation unit 17 for selecting the frequency of AC power, and is configured so that when the frequency switching button 46 is operated, the control unit 15 changes the frequency of the power generated by the inverter 12 from one of 60 Hz and 50 Hz to the other.

The cushioning material 47 is attached to the rear surface 22A of the lid 22 and is provided in the space behind the lid. The cushioning material 47 has a shape that allows the power supply connector 42 to fit (i.e., a power supply connector storage section 47A that stores the power supply connector 42) and a shape that allows the power supply cable 43 to be wound around it. The cushioning material 47 also has a cross-shaped cable storage section 47B located to the right of the power supply connector storage section 47A, and the cable for supplying 12V (i.e., the startup power cable) can be stored in the cable storage section 47B.

The power supply device 1 configured as described above is used with the trolley case 20 in an upright position. The upright position is a state in which the trolley case 20 stands upright relative to the road surface G (see FIG. 8) with both the legs 25 and the wheels 26 in contact with the road surface G and supporting the trolley case 20. When the trolley case 20 is in an upright position, the lid 22 can be rotated relative to the case body 21 to switch between an open state and a closed state.

Next, a process of transporting the power supply device 1 will be described with reference to FIG.
8 shows an example of a process for transporting the trolley case 20 in an upright position. First, as shown in Fig. 8(A), the handle 27 is pulled upward from the trolley case 20. Next, by pulling the handle 27 in the horizontal direction H, as shown in Fig. 8(B), the legs 25 are released from the road surface G, and the trolley case 20 switches to a portable position in which it can roll while the wheels 26 are in contact with the road surface G. Then, by pulling the handle 27 in the horizontal direction H in this state, the power supply device 1 can be transported without lifting the trolley case 20.

According to this embodiment, the following effects are obtained.
(1) When the trolley case 20 is in an upright position, the handle 27 located above the wheels 26 is pulled to take the portable position, so that the trolley case 20 can be easily switched from the upright position to the portable position without lifting the trolley case 20, and the force required to switch to the portable position can be reduced. In addition, since the start button 31 and the stop button 32 (operation unit 17) are located on the top surface 20E of the trolley case 20 in an upright position, the start button 31 and the stop button 32 can be more easily operated from above the trolley case 20 than in a configuration in which the start button 31 and the stop button 32 are located at the bottom of the right side surface 20C or the bottom of the left side surface 20D of the trolley case 20.

(2) The start button 31 and stop button 32 (operation unit 17) are located at the end of the top surface 20E and at the top of the right side surface 20C of the trolley case 20 when the trolley case 20 is in an upright position, improving ease of operation of the start button 31 and stop button 32 from the right (side) of the trolley case 20.

(3) The handle 27 is configured to be removable from the trolley case 20. When the trolley case 20 is in an upright position, the handle 27 can be raised by pulling it upward. This reduces the force required to tilt the trolley case 20, thereby reducing the force required to switch to a portable position.

(4) If the dimension of the trolley case 20 in the left-right direction Y is small, the spacing between the multiple wheels 26 cannot be increased, and there is a risk that the stability of the trolley case 20 when in an upright position will be reduced. In this embodiment, the dimension of the trolley case 20 in the left-right direction Y is larger than the dimension of the trolley case 20 in the front-back direction X and is also larger than the dimension of the trolley case 20 in the up-down direction Z, so it is possible to increase the spacing between the multiple wheels 26, thereby improving the stability of the trolley case 20.

(5) If the dimensions of the trolley case 20 in the vertical direction Z are small, the positions of the handles 27, 28 and the start button 31 and stop button 32 (operation unit 17) will be low, which may make it inconvenient to grip the handles 27, 28 and operate the start button 31 and stop button 32. In this embodiment, the dimensions of the trolley case 20 in the vertical direction Z are greater than the dimensions of the trolley case 20 in the front-rear direction X, so it is possible to raise the positions of the handles 27, 28 and the start button 31 and stop button 32, improving the ease of gripping the handles 27, 28 and the ease of operating the start button 31 and stop button 32.

(6) If the dimensions of the trolley case 20 in the vertical direction Z are large, the position of the center of gravity of the trolley case 20 when in an upright position will be high, which may reduce stability. In this embodiment, the dimensions of the trolley case 20 in the vertical direction Z are smaller than the dimensions of the trolley case 20 in the left-right direction Y, so it is possible to lower the position of the center of gravity of the trolley case 20 when in an upright position, thereby improving the stability of the trolley case 20.

The present invention is not limited to the above embodiment, and the above configuration can be modified as appropriate. For example, the above embodiment can be modified as follows, or the following modifications can be combined to implement the embodiment.

The size relationship of each dimension of the trolley case 20 in the front-back direction X, the left-right direction Y, and the up-down direction Z may be changed. For example, the dimension of the trolley case 20 in the up-down direction Z may be the same as the dimension of the trolley case 20 in the left-right direction Y.

The configuration and arrangement of the operation unit 17 may be changed. For example, the start button 31 and the stop button 32 may be configured to be located in the center of the top surface 20E of the trolley case 20 in an upright position.

The arrangement of the first inlet 20G and the second inlet 20H may be changed. That is, the first inlet 20G may be provided on a side surface of the trolley case 20 other than the left side surface 20D (e.g., the right side surface 20C), and the second inlet 20H may be provided on a side surface of the trolley case 20 other than the right side surface 20C (e.g., the left side surface 20D).

The location of the outlet 44 and the operation unit 17 may be changed. For example, the outlet 44 may be provided on the right side surface 20C or the top surface 20E of the trolley case 20. Also, for example, the start button 31 and the stop button 32 may be provided on the inner wall member 41.

1 Portable power supply device 12 Inverter 17 Operation unit 20 Trolley case 20C Right side (side)
20E Upper surface 25 Legs 26 Wheels 27 Handle 31 Start button 32 Stop button 42 Power supply connector 44 Outlet G Road surface H Horizontal direction P DC power source X Forward/backward direction Y Left/right direction Z Up/down direction

Claims (4)

a power supply connector connected to an external DC power supply;
an inverter that converts DC power input from the power supply connector into AC power;
a power supply cable connecting the power supply connector and the inverter;
an outlet for outputting the AC power output from the inverter;
An operation unit for operating the inverter;
a trolley case for storing the inverter,
The trolley case includes a case body, a lid that contacts the case body to close a space behind the lid when the trolley case is in a closed state, legs and wheels capable of supporting the trolley case, a handle that is grasped when transporting the trolley case, and a first inlet through which the power supply cable passes and a second inlet through which a power cable connected to the outlet passes as openings that communicate between an external space of the trolley case and the space behind the lid ,
the outlet is accommodated in the trolley case and faces the lid back space when the trolley case is in a closed state;
The trolley case (1) assumes an upright position relative to a road surface with both the legs and the wheels in contact with the road surface to support the trolley case, and (2) assumes a portable position in which the legs are released from the road surface and the wheels are in contact with the road surface and can roll when the handle is pulled while the trolley case is in the upright position,
a portable power supply device configured such that, when the trolley case is in the upright position, the power supply connector and the DC power source can be connected through the first line inlet with the trolley case closed, the handle is positioned above the wheels, and the operating unit is positioned on an upper surface of the trolley case. The portable power supply device according to claim 1 , wherein the operation unit is configured to be arranged at an end of an upper surface of the trolley case and at an upper portion of a side surface of the trolley case. 3. The portable power supply device according to claim 1, wherein the handle is configured to be removable from the trolley case. The trolley case is provided with a plurality of wheels spaced apart in a left-right direction, which is a predetermined linear direction;
The legs and the wheels are spaced apart from each other in a front-rear direction that is a linear direction perpendicular to the left-right direction,
The portable power supply device according to any one of claims 1 to 3, characterized in that the dimension of the trolley case in a vertical direction perpendicular to both the front-to-rear direction and the left-to-right direction is larger than the dimension of the trolley case in the front-to-rear direction and smaller than the dimension of the trolley case in the left-to-right direction.

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