JP2016226066A - Portable power supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accommodate a cable so as not to lie in the way during non-use.SOLUTION: A portable power supply device comprises: a cylindrical secondary battery 2; a cylindrical main body case 1 in which the secondary battery 2 is accommodated; a tabular circuit board 3 on which a charge circuit 31 and a discharge circuit 32 of the secondary battery 2 are mounted; and a cable part 4 which is pulled out of an end face 1x of the main body case 1 and with which a connection terminal 5 is provided in a distal end. The main body case 1 is divided, in a length direction, into a battery housing part 1A for housing the secondary battery 2 and a board housing part 1B for housing the circuit board 3, and the cable part 4 is pulled out of the end face 1x of the board housing part 1B. Further, in the main body case 1, the circuit board 3 is positioned in a substantial center of a cylindrical cross-sectional face and disposed in the board housing part 1B while extending in the length direction, and in a space that is formed at a side of a first surface 3A of the circuit board 3 and on a surface of the main body case 1, a housing recess 6 is formed for housing the cable part 4 and the connection terminal 5.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a portable power supply device that is connected to a mobile device such as a mobile phone or a smartphone and charges a battery built in the mobile device. In particular, the battery of the mobile device is carried with the mobile device. The present invention relates to a portable power supply device that is connected to a portable device in a discharged state and charges a built-in battery.

  With the widespread use of portable electronic devices such as mobile phones, smartphones, and portable music players, it is necessary to charge when the battery runs out while on the go, and these portable devices can be charged without a commercial power source nearby. In addition, so-called emergency chargers and emergency chargers (also called “emergency chargers” or “emergency chargers”, “emergency power feeders”, “boosters”, etc.) have been developed (see, for example, Patent Document 1). ). Such an emergency charger is shown in FIG. In this charger, a commercially available secondary battery 302 (for example, two AA batteries) is housed in a hollow cylindrical main body 310, the open end is closed by a cap portion 320, and the cap portion A USB terminal 322 is provided on the end face of 320. Thereby, discharge according to the USB standard becomes possible.

  On the other hand, in order to facilitate connection with a portable electronic device such as a smartphone to be charged, it is often more convenient to connect via a cable rather than directly connecting a smartphone to an emergency charger. In addition, there are a plurality of USB terminal standards, and in particular, many recent portable electronic devices adopt micro USB terminals for miniaturization and thinning. A cable may be required. In this case, it is conceivable that a USB cable is connected to the emergency charger shown in FIG. 15, or the USB cable 304 is directly attached to the cap portion 320B as shown in the modification of FIG.

  However, any of these emergency chargers can be easily connected with a portable electronic device by a cable when used, but has a problem that the cable becomes an obstacle when not used. That is, when carrying an emergency charger, for example, if it is to be carried in a bag, it will be difficult to handle because the cable will run around inside the bag. In addition, the USB terminal and the base of the cable may be greatly bent inside the bag, causing damage or disconnection inside. In order to prevent this, the USB cable can be detachable as shown in FIG. 15, and the USB cable can be taken up and stored separately. In this case, however, it is time-consuming to unplug the USB cable and reconnect it. Take it. There is also a risk of losing the USB cable. On the other hand, in the method of directly attaching the USB cable as shown in FIG. 16, there is no risk of such connection trouble or loss, and there is an advantage that it can be used quickly at the time of use, but the cable becomes an obstacle when not in use. It was not possible to avoid the problem.

JP 2011-096588 A

  The present invention has been made to solve such conventional problems. A main object of the present invention is to provide a portable power supply device that can store a cable so as not to get in the way when not in use.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, according to the portable power supply device of the present invention, a cylindrical secondary battery 2 and a cylindrical main body case extended in one direction for accommodating the secondary battery 2 therein. 1, 201, a flat circuit mounted with a charging circuit 31 that is electrically connected to the secondary battery 2 and charges the secondary battery 2, and a discharge circuit 32 that discharges the secondary battery 2 A portable power supply device including a substrate 3 and a cable portion 4 that is pulled out from the end faces 1x and 201x of the main body cases 1 and 201 and provided with a connection terminal 5 at a tip thereof, wherein the cable portion 4 and the connection terminal 5 is smaller than ½ of the cross-sectional area of the cylindrical main body case 1, 201, and the main body case 1, 201 has the secondary battery 2 in the longitudinal direction. The battery storage portion 1A to be stored, and the rotation The board 3 is divided into a board storage section 1B for storing the board 3, and the cable section 4 is drawn out from the end faces 1x and 201x of the board storage section 1B. 1B, the circuit board 3 is disposed in the longitudinal direction in the center of the cylindrical cross section, and is a space formed on the first surface 3A side of the circuit board 3; Storage concave portions 6 and 206 for storing the cable portion 4 and the connection terminal 5 are formed on the surfaces of the main body cases 1 and 201.
In this specification, the cross section of the cable part, the connection terminal, and the main body case are cut along a plane perpendicular to the extension direction of the cable part, the extension direction of the connection terminal, and the extension direction of the main body case, respectively. It shall mean a cross section.

  With the above configuration, when not in use, the cable portion and the connection terminal can be housed in the housing recess of the main body case and can be gathered in a compact manner, thereby improving portability. In addition, by utilizing the dead space generated by arranging the flat circuit board inside the cylindrical main body case, a storage space for the cable portion and the connection terminal is provided, so that the storage space of the main body case can be reduced. Without installing outside, in other words, without enlarging the main body case, without changing the cylindrical design significantly, and without carrying the portability, the cable body and connection terminals can be housed in the cylindrical main body case. It becomes possible.

Further, according to another portable power supply device, the depressions 10 and 210 are formed in the end faces 1x and 201x of the main body cases 1 and 201, and the cable part 4 is pulled out to the outside through the depressions 10 and 210. Can do.
With the above configuration, the cable portion is a lead-out portion, and the contact portion with the cable portion is a recessed portion, so that it can be bent to the front, rear, left and right at the base portion of the cable portion as compared with the conventional protruding bush. The load can be reduced and the resistance to repeated bending can be increased.

Moreover, according to another portable power supply device, the said recessed parts 10 and 210 can chamfer the inner surface of the opening part by the side of the end surfaces 1x and 201x in the shape of a convex curve at the center.
With the above configuration, by chamfering the opening of the recessed portion into a central convex curved shape, the cable portion is bent along the central convex curved surface in a state where the base portion of the cable portion pulled out from the main body case is bent. The load applied to this portion can be further reduced by curving.

Further, according to another portable power supply device, the bush portions 7, 207 that cover the periphery of the cable portion 4 are provided inside the end faces 1 x, 201 x of the main body cases 1, 201, The depressions 10 and 210 can be formed on the end faces 1x and 201x side of 207.
With the above configuration, the bush portion that covers the periphery of the cable portion is provided inside the end surface of the main body case, and the recess portion is provided on the end surface side of the bush portion, so that the base portion of the cable portion that is pulled out from the main body case is folded. In a bent state, it is possible to effectively prevent this portion from being bent excessively, and to reduce the occurrence of breakage or disconnection.

According to another portable power supply device, the bush portions 7 and 207 can be made of a material softer than the main body cases 1 and 201.
With the above configuration, even if the base part of the cable part pulled out from the main body case is excessively bent, the load on the cable part is eased by the bush part formed of a softer material than the main body case, and the cable is damaged or broken. This can reduce the occurrence of

According to another portable power supply device, the bush portions 7 and 207 can be divided into two parts so as to sandwich the cable portion 4.
With the above-described configuration, it is possible to assemble the portable power supply device so that the cable portion can be sandwiched without being inserted into the bush portion when the portable power supply device is assembled.

Further, according to another portable power supply device, the storage recesses 6 and 206 are formed wider than the cable storage units 61 and 261 having groove shapes for storing the cable unit 4 and the cable storage units 61 and 261. And the terminal accommodating part 62 for accommodating the connection terminal 5, and the terminal accommodating part 62 is formed on the outer peripheral surface of the main body case 1, 201 along the first surface 3 </ b> A of the circuit board 3. The cable storage portions 61 and 261 can be extended from the terminal storage portion 62 to the end surfaces 1x and 201x of the main body case 1 and 201, respectively.
With the above configuration, the connection terminal can be easily guided and stored in the terminal storage portion formed wider than the cable storage portion while the cable portion is stored in the groove-shaped cable storage portion. In addition, while storing the connection terminal in the terminal storage part formed on the outer peripheral surface of the main body case along the first surface of the circuit board, the cable is stored in the cable storage part extended from the terminal storage part to the end surface of the main body case. By doing so, the cable part can be stored compactly inside the outer peripheral surface of the main body case.

Furthermore, according to another portable power supply device, the groove-shaped cable storage portion 61 extended to the end surface 1x of the main body case 1 is arranged in the radial direction of the cylindrical main body case 1 inside the end surface 1x. And can be communicated with the recess 10.
With the above configuration, the cable storage portion that extends to the end surface of the main body case is curved in the radial direction of the main body case on the inner side of the end surface and communicates with the indented portion, so that the cable drawn from the indented portion on the end surface of the main body case The cable portion can be guided so as not to protrude outward from the end surface of the main body case by guiding the portion to the cable storage portion inside the end surface. Accordingly, the cable portion can be housed within the outer shape of the main body case without protruding outside the main body case, and can be made into a beautiful design.

Furthermore, according to another portable power supply device, the cable portion 4 has a circular cross-sectional shape, and the connection terminal 5 provided at the tip of the cable portion 4 has a substantially flat outer shape. The cable housing portion 61 has a substantially U-shaped groove shape in which the cable portion 4 can be inserted, and the terminal housing portion 62 has a cross-sectional view in which the connection terminal 5 can be stored in a posture parallel to the circuit board 3. It can be a substantially U-shaped groove shape.
With the above configuration, the cable part has a circular cross-sectional shape, and the cable part is stored in the storage recess while smoothly bending the cable part while increasing the degree of freedom of bending at the base part of the cable part. it can. Moreover, by making the cable storage portion into a substantially U-shaped groove shape in cross section, the cable storage portion can be stored along the inner surface of the cable storage portion without damaging the cable portion. Furthermore, by storing the flat connection terminals in the terminal storage section in a posture parallel to the circuit board, the storage recesses are shallowly formed and the connection terminals are ideally stored without protruding outside the main body case. it can.

Still further, according to another portable power supply device, the housing recess 6 formed on one side of the circuit board 3 with the drawing position of the cable portion 4 on the end faces 1x and 201x of the main body cases 1 and 201, It can be decentered from the center of the end faces 1x, 201x away from the center 206.
The above configuration ensures a certain radius to curve the cable part when the cable part is housed in the housing recess by decentering the cable part on the end surface of the main body case from the center of the end surface away from the housing recess. Thus, it becomes possible to increase the reliability of bending.

  Furthermore, according to another portable power supply device, a charging connector 34 for charging the secondary battery can be provided.

  Furthermore, according to another portable power supply device, the connection terminal can be a lightning terminal.

  Furthermore, according to another portable power supply device, the connection terminal can be a USB terminal.

  Furthermore, according to another portable power supply device, the secondary battery can be a lithium ion secondary battery.

It is a perspective view of the portable power supply device concerning Example 1 of this invention. It is a bottom perspective view of the portable power supply device of FIG. FIG. 3 is a bottom perspective view showing a usage state of the portable power supply device of FIG. 2. It is the disassembled perspective view which removed the cover case of the portable power supply device of FIG. FIG. 5 is an exploded perspective view in which the portable power supply device of FIG. 4 is further disassembled. It is a vertical longitudinal cross-sectional view of the portable power supply device of FIG. It is a VII-VII line longitudinal cross-sectional view of the portable power supply device of FIG. It is a VIII-VIII line longitudinal cross-sectional view of the portable power supply device of FIG. It is the IX-IX line longitudinal cross-sectional view of the portable power supply device of FIG. It is a block diagram of the portable power supply device concerning Example 1 of this invention. It is an expansion disassembled perspective view of the drawer part of a cable part. It is the disassembled perspective view which looked at the drawer part of the cable part shown in FIG. 11 from the back side. It is a perspective view of the portable power supply device concerning the other Example of this invention. It is an expanded sectional view which shows the accommodation state of the cable part of the portable power supply device of FIG. It is a disassembled perspective view of the conventional portable power supply device. It is a perspective view of the other conventional portable power supply device.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiment described below exemplifies a portable power supply device for embodying the technical idea of the present invention, and the present invention does not specify the portable power supply device as follows. In addition, the member shown by the claim is not what specifies the member of embodiment. In particular, the dimensions, materials, shapes, relative arrangements, and the like of the constituent members described in the embodiments are not intended to limit the scope of the present invention only to the description unless otherwise specified. It's just an example. Note that the size, positional relationship, and the like of the members shown in each drawing may be exaggerated for clarity of explanation. Furthermore, in the following description, the same name and symbol indicate the same or the same members, and detailed description thereof will be omitted as appropriate. Furthermore, each element constituting the present invention may be configured such that a plurality of elements are constituted by the same member and the plurality of elements are shared by one member, and conversely, the function of one member is constituted by a plurality of members. It can also be realized by sharing. In addition, the contents described in some examples and embodiments may be used in other examples and embodiments.

Example 1
1 to 10 show a portable power supply device according to a first embodiment. In these drawings, FIG. 1 is a perspective view showing the portable power supply according to the first embodiment, FIG. 2 is a bottom perspective view of the portable power supply of FIG. 1, and FIG. 3 is a use state of the portable power supply of FIG. 4 is an exploded perspective view of the portable power supply device shown in FIG. 1 with the cover case removed, FIG. 5 is a further exploded perspective view of the portable power supply device of FIG. 4, and FIG. 7 to 9 are vertical cross-sectional views of the portable power supply device of FIG. 1, and FIG. 10 is a block diagram of the portable power supply device.

  A portable power supply device 100 shown in these drawings includes a cylindrical secondary battery 2, a cylindrical main body case 1 extending in one direction for accommodating the secondary battery 2, a secondary battery 2, and the like. A flat circuit board 3 on which a charging circuit 31 that is electrically connected and charges the secondary battery 2 and a discharge circuit 32 that discharges the secondary battery 2 to the outside are mounted, and an end face 1x of the main body case 1 And a cable portion 4 provided with a connection terminal 5 at the tip. Furthermore, the portable power supply device 100 shown in the figure is attached to one end of the cylindrical main body case 1 on the side opposite to the end from which the cable portion 4 is drawn, and covers this portion. A cover case 8 is provided. As shown in FIGS. 3 and 10, the portable power supply device 100 described above is connected to the portable device 90 with the connection terminal 5 provided at the distal end of the cable portion 4 drawn from the end surface 1 x of the main body case 1. The internal battery 92 of the portable device 90 connected externally is charged with the electric power discharged from the secondary battery 2. Further, the portable power supply device 100 stores these in the storage recess 6 provided on the surface of the main body case 1 as shown in FIG. 2 when the cable portion 4 and the connection terminal 5 are not used. .

(Secondary battery 2)
The cylindrical secondary battery 2 is a lithium ion battery. The structure in which the secondary battery 2 is a lithium ion battery is characterized in that the charge / discharge capacity can be increased. However, the secondary battery can be any rechargeable battery such as a nickel metal hydride battery or a nickel cadmium battery in place of the lithium ion battery. The secondary battery 2 is a battery having a capacity larger than a capacity capable of fully charging the built-in battery of the mobile device to be charged, and has a capacity capable of fully charging the built-in battery of the mobile device once or more.

  The portable power supply device 100 shown in the figure stores one AA battery as a cylindrical secondary battery 2 in a main body case 1. However, two or more secondary batteries can be accommodated in the main body case. The plurality of secondary batteries can be stored in the main body case in a state extended in one direction. A portable power supply device incorporating a plurality of secondary batteries can have these batteries connected in series or in parallel. Further, the secondary battery is not limited to an AA battery, but can be an AAA battery or a battery having a larger size.

(Body case 1)
The main body case 1 has a hollow cylindrical shape, and houses a cylindrical secondary battery 2 and a flat circuit board 3 therein. As shown in FIGS. 1 to 5, the main body case 1 has a cylindrical outer peripheral surface that is extended in the axial direction of the secondary battery 2, and both ends are closed by circular end surface walls 13. Yes. The main body case 1 is composed of an insulating member in order to maintain insulation of the built-in secondary battery 2. The body case 1 is made of a resin such as plastic, for example.

  As shown in FIGS. 4 to 6, the cylindrical main body case 1 is divided in the longitudinal direction into a battery storage portion 1 </ b> A for storing the cylindrical secondary battery 2 and a substrate storage portion 1 </ b> B for storing the circuit board 3. Has been. The main body case 1 shown in the figure houses the secondary battery 2 with the almost half on the left side as the battery housing portion 1A and the circuit board 3 with the almost half on the right side as the board housing portion 1B. In the portable power supply device 100, the cable portion 4 is drawn from the end surface 1 x of the substrate housing portion 1 </ b> B of the main body case 1.

  As shown in FIGS. 6 and 7, the battery housing portion 1 </ b> A of the main body case 1 is formed in an inner shape capable of housing the secondary battery 2. The main body case 1 accommodates the cylindrical secondary battery 2 so that the secondary battery 2 can be smoothly accommodated and can be held so that the accommodated secondary battery 2 does not rattle inside. The inner shape of the battery housing portion 1A is determined. Here, the clearances of the inner diameter, the outer diameter, and the full length are designed so that one AA type secondary battery 2 can be accommodated. Furthermore, the main body case 1 shown in the figure has a rod shape in which the outer diameter of the battery housing portion 1A is suppressed to be slightly thicker than the diameter of the secondary battery 2, and the required minimum size is reduced. Thus, the small size and light weight are advantageous for carrying the portable power supply device, and a stick-type and simple design can be realized.

  As shown in the cross-sectional views of FIGS. 6, 8, and 9, the substrate storage portion 1 </ b> B of the main body case 1 is located at the approximate center of the transverse cross section of the cylindrical main body case 1. The flat circuit board 3 is housed in a manner extending. In the cylindrical main body case 1, the circuit board 3 is arranged at the center of the cross section, so that a dead space is formed between the space on both sides of the circuit board 3 and the arcuate outer peripheral surface. The main body case 1 shown in the figure is a space on the first surface 3A side (the lower surface side in the drawing) of the circuit board 3 so as to effectively use this dead space, and the cable portion 4 is provided on the surface of the main body case 1. And the storage recessed part 6 which accommodates the connecting terminal 5 is formed. Thus, the cable portion 4 and the connection terminal 5 can be accommodated in the cylindrical main body case 1 without enlarging the outer shape of the main body case 1 and without greatly changing the cylindrical design. The structure of the storage recess 6 will be described later in detail.

  As shown in the exploded perspective view of FIG. 5, the main body case 1 is divided into two in the longitudinal direction in order to accommodate the secondary battery 2 and the circuit board 3 in the internal space. The main body case 1 is formed in a hollow shape by connecting the first case 11 and the second case 12 divided by two at the opening edge. The main body case 1 is preferably divided into a first case 11 and a second case 12 in the middle of the upper and lower sides in the figure. The first case 11 and the second case 12 are connected to each other at an opening edge in a state where the secondary battery 2 is stored in the battery storage portion 1A and the circuit board 3 is stored in the substrate storage portion 1B. 1 is formed.

  As shown in FIGS. 6 to 9, 11, and 12, the first case 11 and the second case 12 have a structure that can be connected to each other while being positioned. The main body case 1 shown in these figures is provided with a joining rib 21 along the inner side of the opening edge of the first case 11 in the battery housing portion 1A, and along the inner side of the opening edge of the second case 12. The joint recessed part 22 which opposes is provided. Further, the main body case 1 shown in the figure is provided with a locking rib 23 along the inner side of the opening edge of the first case 11 in the board housing portion 1B. A locking projection 24 for locking the rib 23 is provided. The locking projection 24 shown in the figure is a locking hook that protrudes to the inner surface side of the opening edge, and the locking rib 23 is provided with a locking hole 23A that locks the locking hook. Yes. In the first case 11 and the second case 12 described above, the joining rib 21 is guided to the joining recess 22, and the latching protrusion 24 is guided to the latching hole 23 </ b> A of the latching rib 23 and coupled to each other. The first case 11 and the second case 12 are connected so as not to be separated from each other by the locking structure of the locking ribs 23 and the locking protrusions 24 in the substrate storage portion 1B. The first case 11 and the second case 12 are not separated from each other because the joining rib 21 and the joining recess 22 are not latched in the battery housing portion 1A, but are connected by a latching structure in the substrate housing portion 1B. Connected. In particular, in the portable power supply device 100 shown in the figure, since a cover case 8 (described later) is attached to the outside of the battery housing portion 1A of the first case 11 and the second case 12 that are connected to each other, they are not separated from each other. Connected securely.

  In the main body case 1, the flat circuit board 3 is arranged in a plane parallel to the opening surfaces of the first case 11 and the second case 12 in the board housing portion 1 </ b> B. That is, the main body case 1 has a circuit in which the first case 11 is arranged on the first surface 3A (lower surface in the drawing) side of the circuit board 3 and the second case 12 is arranged on the second surface 3B (upper surface in the drawing) side. The circuit board 3 is housed in the board housing portion 1B in a state where the board 3 is sandwiched from both sides.

  The main body case 1 shown in the figure has support ribs 25 and 26 protruding inside the openings of the first case 11 and the second case 12 so that the circuit board 3 can be held at a fixed position in the center of the board housing part 1B. It is formed by integral molding. The support ribs 25 and 26 stand upright in a vertical posture with respect to the horizontal circuit board 3. The main body case 1 is formed by integrally forming vertical support ribs 25 and 26 on the inner surfaces of the first case 11 and the second case 12 whose outer peripheral surfaces are arc-shaped, so that they can be efficiently formed in an arc-shaped inner space. The rigidity of the main body case 1 can be increased while arranging well. The support ribs 25 and 26 of the first case 11 and the second case 12 are in a state in which their leading edges are brought into contact with or close to the circuit board 3, and the support ribs 25 of the first case 11 and the support ribs 26 of the second case 12. The circuit board 3 is held from both sides and held at a fixed position of the board storage portion 1B. Note that the upper ends of the support ribs 25 and 26 are not necessarily in contact with the surface of the circuit board 3. In particular, since various electronic components are mounted on the surface of the circuit board 3, there is a risk that these electronic components may be damaged or short-circuited if they are brought into direct contact with each other. Therefore, it is preferable that the distance is slightly separated.

  Furthermore, the main body case 1 shown in the drawing has a positioning boss 27 inserted into a positioning hole 3a opened in the center of the circuit board 3 in order to connect the circuit board 3 to a fixed position. The connection boss 28 connected to the positioning boss 27 is integrally formed on the inner surface side of the second case 12. The first case 11 and the second case 12 are connected to each other at a fixed position by inserting a connection boss 28 inside a cylindrical positioning boss 27. The circuit board 3 is held from both sides by the support ribs 25 of the first case 11 and the support ribs 26 of the second case 12 in a state where the positioning bosses 27 are guided in the positioning holes 3a, so that the circuit board 3 is in a fixed position of the board storage portion 1B. Retained. Further, as shown in FIG. 6, the first case 11 and the second case 12 have a set screw 29 that penetrates the bottom surface 63 of the housing recess 6 of the first case 11 and is screwed into the connecting boss 28 at the center of the positioning boss 27. And firmly fixed by screwing.

(Circuit board 3)
The circuit board 3 is a flat glass epoxy board for charging the secondary battery 2 from the secondary battery 2 to the charging circuit 31 (see FIG. 10) for charging the secondary battery 2 and the portable device 90 connected externally. Electronic components for realizing the discharge circuit 32 (see FIG. 10) and the like are mounted on the front and back surfaces. Further, the circuit board 3 shown in FIGS. 5 and 8 is mounted with a charging connector 34 for charging the built-in secondary battery 2.

  Since the circuit board 3 mounts various electronic components, it requires a certain surface area. Therefore, the circuit board 3 shown in FIGS. 6, 8, and 9 is arranged at the approximate center in the cross section of the cylindrical main body case 1 to ensure a lateral width and extend in the longitudinal direction of the main body case 1. By arranging it, the length is secured and the entire area is increased. That is, the circuit board 3 is disposed along the diameter direction of the circular cross section inside the main body case 1 to ensure a wide area. Here, “arranging along the diametrical direction” does not necessarily need to coincide with the diameter, and it only needs to be parallel to the diametrical direction. In particular, as shown in FIG. 8, the main body case 1 has the charging connector 34 mounted on the circuit board 3 arranged in the diametrical direction and exposed from the side surface, so that the circuit board 3 is slightly offset parallel to the diametrical direction. Are arranged.

(Cable 4)
As shown in FIGS. 3 and 5, the cable portion 4 is drawn out from the end surface 1 x of the main body case 1, and a connection terminal 5 connected to an external portable device is connected to the tip. The area of each cross section of the cable part 4 and the connection terminal 5 is smaller than 1/2 of the area of the cross section of the cylindrical main body case 1, and is arranged at the approximate center of the cylindrical main body case 1. The circuit board 3 can be stored in a space formed on the first surface 3A side.

  The cable portion 4 protects the lead wires 41 by covering them with plastic. One end of each of the plurality of lead wires 41 covered with plastic is connected to the connection terminal 5 provided at the tip of the cable portion 4, and the other end is connected to the circuit board 3 inside the main body case 1. As shown in FIGS. 11 and 12, the plastic covering the lead wire 41 is formed by integrally forming a fixed block 42 at the end of the main body case 1, and the fixed block 42 is provided on the inner surface of the main body case 1. It is fixed by being fitted to fixing portions 43 and 44 provided in. The main body case 1 shown in FIGS. 11 and 12 is integrally formed with an inner surface of the first case 11 with a fixing portion 43 including a groove-like rib 45 into which a fixing protrusion 42A provided on the first surface of the fixing block 42 is fitted. The fixing portion 44 into which the convex portion 42B on the second surface side of the fixing block 42 is fitted is provided on the inner surface of the second case 12. The second case 12 shown in FIG. 12 includes a plurality of ribs 46 that are integrally formed to protrude from the inner surface, and constitutes a fixed portion 44 into which the convex portion 42B of the fixed block 42 is fitted. The cable portion 4 includes the first case 11 in a state where the fixed convex portion 42A of the fixed block 42 is guided to the fixed portion 43 of the first case 11 and the convex portion 42B of the fixed block 42 is guided to the fixed portion 44 of the second case 12. And the second case 12 are connected to each other and fixed to a fixed position of the main body case 1, and the cable portion 4 is prevented from coming off from the main body case 1.

  The cable part 4 in the figure has a circular cross-sectional shape. The cable part 4 having a circular cross-sectional shape is used in a state where the cable part 4 is pulled out to the outside of the main body case 1 and used, and the degree of freedom of bending in the front, rear, left and right at the base part of the cable part 4 is increased. Can be smoothly stored in the storage recess 6. However, the cable portion may have an oblong shape, a substantially oval shape, or an 8-shaped cross section so that the cable portion has a substantially flat portion. In the cable portion having the above-described cross-sectional shape, the load for bending in the minor axis direction is smaller than that in the major axis direction, and bending in this direction becomes easy. For this reason, this cable part is pulled out from the main body case so that it can be stored in the cable storage part in a state of being bent in the short diameter direction, and the width direction of the flat connection terminal is the long diameter direction of the cable part. A connection terminal is provided at the tip of the cable portion.

(Connection terminal 5)
The connection terminal 5 is connected to the tip of the cable portion 4 with the overall shape being substantially flat. The connecting terminal 5 shown in the figure includes a terminal portion 5A to which a plurality of lead wires 41 are connected, and a main body portion 5B that projects the terminal portion 5A from the tip. The main body portion 5B is formed of an insulating material such as plastic, and is electrically connected to an external portable device while insulating the terminal portion 5A. The connection terminal 5 shown in the figure is a lightning terminal. Therefore, this portable power supply device can supply power to all portable devices to which the lightning terminal can be connected. However, the connection terminal can be a USB terminal or another terminal structure that can be electrically connected to an externally connected portable device.

(Recessed portion 10)
In the portable power supply device 100 described above, the cable portion 4 is pulled out from the end surface 1x of the board housing portion 1B. However, as shown in FIGS. 1 to 4 and FIG. Instead of a conventional protruding bush, the recess 10 is provided on the end surface 1x of the main body case 1. That is, the portable power supply device 100 has a recess 10 formed in the end surface 1x of the main body case 1, and the cable portion 4 is drawn to the outside in the recess 10. The recess 10 in the figure is formed so that the opening area gradually decreases inward from the opening edge on the end face 1x side, and the cable portion 4 is pulled out from the central portion of the recess 10. Further, the hollow portion 10 in the figure is chamfered so that the inner surface of the opening on the end surface 1x side is a curved surface having a central convex shape, and the inner surface shape is a trumpet shape. Thus, the structure which makes the drawer | drawing-out part of the cable part 4 the hollow part 10 can reduce the load with respect to the bending to the front and rear, right and left in the base part of the cable part 4 compared with the conventional protruding type bush. In particular, by chamfering the opening of the recess 10 into a centrally convex curved surface, the lead-out portion of the cable portion 4 can be curved along the centrally convex curved surface, and the load applied to this portion can be further reduced. However, the recess does not specify the chamfered shape of the opening as a curved surface having a central convex shape. The indented portion can have any other inner shape that can reduce the load on the root portion caused by bending of the cable portion.

(Bush part 7)
Furthermore, the portable power supply device 100 includes a bush portion 7 that covers the periphery of the cable portion 4 inside the end surface 1x of the main body case 1, and a recess portion 10 is formed on the end surface 1x side of the bush portion 7. Yes. The portable power supply device 100 shown in the figure covers the periphery of the cable portion 4 by arranging a bush portion 7 formed of a separate member from the main body case 1 inside the end face 1x. As shown in FIGS. 11 and 12, the bush portion 7 formed of a member different from the main body case 1 is disposed in the opening 13 </ b> A provided in the end surface wall 13 of the main body case 1, and is in a fixed position inside the end surface 1 x. Fixed to. However, the portable power supply device can be provided integrally with the main body case without forming the bush portion as a separate member from the main body case. The bush part formed integrally with the main body case is, for example, divided into a first case and a second case, and the cable part is sandwiched from both sides in a state where the first case and the second case are connected to each other. Can cover the cable area.

  The bush portion 7 formed of a separate member from the main body case 1 is preferably formed of a material softer than the main body case 1 so that the cable portion 4 can be protected. Here, the main body case 1 is formed of a hard plastic having such a strength that the entire shape can be held in a predetermined cylindrical shape with the secondary battery 2 and the circuit board 3 accommodated therein. As such plastic, for example, polycarbonate and ABS can be used. On the other hand, the bush portion 7 is formed of a material softer than the main body case 1, for example, a soft plastic such as an elastomer or silicon rubber, in order to protect the cable portion 4.

  Furthermore, the bush part 7 is divided | segmented so that the perimeter of the cable part 4 may be covered, as shown in FIG.5, FIG.6, FIG.11 and FIG. The bush portion 7 in these figures is divided into two parts, a first divided piece 71 and a second divided piece 72 that cover the cable portion 4 from both sides. The bush portion 7 shown in the figure is divided into two parts by a plane substantially parallel to the circuit board 3, and a first divided piece 71 arranged on the first case 11 side and a second arranged on the second case 12 side. It is composed of divided pieces 72. The first divided piece 71 and the second divided piece 72 are connected to each other in a state where the root portion of the cable portion 4 is sandwiched from both sides, and covers the root portion of the cable portion 4.

  As shown in FIGS. 11 and 12, the first divided piece 71 and the second divided piece 72 are provided with holding cylinder portions 71A and 72A for holding the base portion of the cable portion 4 inside the end face 1x, The holding cylinder portions 71A and 72A are formed on the end face 1x side, and are formed of curved support portions 71B and 72B that protect the drawn portion of the cable portion 4. As shown in FIG. 6, the holding cylinder portions 71 </ b> A and 72 </ b> A connect the first divided piece 71 and the second divided piece 72 to each other and connect the base portion of the cable portion 4 between the opposing semi-cylindrical inner surfaces. A tubular portion is formed by being sandwiched from both sides, and the tubular portion is held in a state of covering the periphery of the cable portion 4. Further, the curved support portions 71B and 72B formed on the end surface sides of the holding cylinder portions 71A and 72A are disposed in the opening portion 13A opened in the end surface wall 13 of the main body case 1, and are recessed on the inner side of the end surface 1X. 10 is formed.

  As shown in FIG. 12, the curved support portion 72 </ b> B of the second divided piece 72 has a semicircular inner surface shape in a cross section perpendicular to the longitudinal direction of the main body case 1. The curved support portion 72B having a semicircular inner surface shape is formed so that the opening area gradually increases toward the end surface 1x. In particular, the curved support portion 72B in the figure has an inner surface shape in a vertical cross section passing through the center of the semicircle, and a shape that is opened in a trumpet shape as a curved surface having a central convex shape. Thus, the lead-out portion of the cable portion 4 is curved along the central convex curved surface so that the load applied to this portion can be reduced.

  Further, as shown in FIGS. 11 and 12, the curved support portion 71 </ b> B of the first split piece 71 can draw out the cable portion 4 from the longitudinal direction of the main body case 1 in the radial direction on the end surface 1 x of the main body case 1. The open part 20 opened in the horizontal direction is formed. The opening portion 20 is formed in a groove shape that can guide the cable portion 4, and can guide the cable portion 4 drawn in the longitudinal direction by curving it in the radial direction. The curved support part 71B shown in the figure has a substantially U-shaped cross section in a vertical cross section parallel to the circuit board 3, and the opposed inner surface of the U-shaped upper end is formed as a central convex curved surface toward the opening edge. The opening area is increased. Thus, the cable portion 4 can be protected while being smoothly guided to the opening portion 20. Further, as shown in FIG. 6, the curved support portion 71B has a U-shaped bottom surface in cross-section, and is formed into a curved surface continuous with the inner surface of the holding cylinder portion 71A, and the cable portion 4 extends along the bottom surface. It can be pulled out in the radial direction in a curved state. A curved portion 61A of a cable storage portion 61, which will be described later, is connected to the open portion 20, and the cable portion 4 is pulled out from the recess portion 10 to be bent in the radial direction so as not to protrude from the end surface 1x. The unit 61 can be guided.

  As shown in FIGS. 11 and 12, the first divided piece 71 and the second divided piece 72 are connected at fixed positions via a connecting convex portion 73 and a connecting concave portion 74 provided on the opposing surface. The first divided piece 71 and the second divided piece 72 in the figure are provided with a connecting convex portion 73 on one of the opposing surfaces of the holding cylinder portions 71A, 72A and the curved support portions 71B, 72B and a connecting concave portion 74 on the other side. The protrusions 73 are fitted in the connection recesses 74 and connected to each other.

  Furthermore, the bush part 7 arrange | positioned at the opening part 13A of the end surface 1x is being fixed to the fixed position of the main body case 1 by the fitting structure. The bush portion 7 shown in the figure is integrally formed with a fitting rib 75 protruding toward the first case 11 and a fitting convex portion 76 protruding toward the second case 12. The bush portion 7 in the figure protrudes outside the holding cylinder portion 71A of the first divided piece 71 and is provided with a fitting rib 75, and protrudes outside the holding cylinder portion 72A of the second divided piece 72 and is a fitting convex portion. 76 is provided. The main body case 1 is provided with an insertion groove portion 15 into which the fitting rib 75 is inserted on the inner surface of the first case 11. The first case 11 shown in the figure is integrally formed with a pair of groove-type ribs 17 standing upright in a posture perpendicular to the opening surface. The groove-type ribs 17 are used as fitting groove portions 15 to form first divided pieces. 71 fitting ribs 75 are inserted and connected. Further, the main body case 1 is provided with a fitting recess 16 into which the fitting convex portion 76 is fitted on the inner surface of the second case 12. In the second case 12 shown in the figure, a low cylindrical tube portion 18 is formed on the inner surface of the outer peripheral surface, and the inside of the tube portion 18 is used as a fitting recess 17. The fitting convex portion 76 provided on the second divided piece 72 has an outer shape that can be fitted into the fitting concave portion 16, and the fitting convex portion 76 is fitted into the fitting concave portion 16 so that the second divided piece 72 is inserted into the second case 12. It is arranged at the fixed position.

  The bush portion 7 having the above structure sandwiches the base portion of the cable portion 4 from both sides with the first divided piece 71 and the second divided piece 72, and the fitting rib 75 of the first divided piece 71 has the first case 11. The first case 11 and the second case 12 are connected in a state where the fitting projection 76 of the second divided piece 72 is fitted into the fitting recess 16 of the second case 12. 1 fixed position.

  Further, the portable power supply device 100 shown in FIG. 1 decenters the drawing position of the cable portion 4 on the end surface 1x of the main body case 1 from the center of the end surface 1x so as to be away from the housing recess 6 formed on one side of the circuit board 3. ing. That is, in FIG. 6, the drawing position of the cable portion 4 is shifted above the center line m in the longitudinal direction of the main body case 1. In this way, by decentering the drawing position of the cable portion 4 on the end surface 1x away from the storage recess 6, the radius of curvature of the cable portion 4 that is curved when the cable portion 4 is stored in the storage recess 6 is increased. And the reliability with respect to the bending of the cable part 4 can be improved.

(Storage recess 6)
Further, the portable power supply device 100 has a housing recess 6 capable of housing the cable portion 4 drawn from the end surface 1x of the substrate housing portion 1B and the connection terminal 5 provided at the tip of the cable portion 4 on the surface of the main body case 1. Provided. The main body case 1 of FIGS. 4 and 6 is provided with a housing recess 6 extending in the longitudinal direction on the surface of the first case 11 disposed on the first surface 3A side of the circuit board 3. The storage recess 6 shown in the figure includes a groove-shaped cable storage 61 that stores the cable portion 4 and a terminal storage 62 that is formed wider than the cable storage 61 and stores the connection terminal 5. ing. The cable storage portion 61 and the terminal storage portion 62 are connected in the extending direction of the main body case 1, and the cable portion 4 drawn from the end surface 1 x of the main body case 1 is stored in the cable storage portion 61 and the tip of the cable portion 4 The connection terminal 5 provided in the terminal housing 62 is housed in the terminal housing portion 62.

(Cable storage)
The cable storage part 61 has a sufficient depth that allows the cable part 4 to be stored so as not to protrude outside the main body case 1. The cable housing portion 61 shown in FIG. 8 has a U-shaped cross section so that it can be smoothly guided without damaging the cable portion 4. One end of the cable storage portion 61 is connected to the terminal storage portion 62, and the other end is extended to the end surface 1 x of the main body case 1 and opened to the end surface 1 x side. Thus, the structure in which one end of the cable storage portion 61 is extended to the end surface 1x and opened has a characteristic that the cable portion 4 can be stored in the main body case 4 without protruding outward from the outer peripheral surface of the main body case 1.

  Further, the portable power supply device 100 shown in FIGS. 3, 6, and 12 has a groove-shaped cable housing portion 61 that extends to the end surface 1x of the main body case 1, and a cylindrical main body case 1 inside the end surface 1x. It is curved in the radial direction and is connected to the recess 10. The portable power supply device 100 shown in FIG. 1 opens one side of the bush portion 7 disposed on the end face 1x of the main body case 1 toward the cable housing portion 61, and the opening portion 20 formed in the bush portion 7 and the cable housing portion. 61 is connected to the inside of the end surface 1x. Thus, on the end surface 1x of the main body case 1, the structure in which the cable housing portion 61 is bent and connected to the recess portion 10 is formed from the recess portion 10. The cable portion 4 to be drawn out is guided to the cable storage portion 61 inside the end surface 1x, and the cable portion 4 can be stored compactly so as not to protrude outward from the end surface 1x.

(Terminal compartment)
The terminal storage portion 62 is formed on the outer peripheral surface of the main body case 1 along the first surface 3 </ b> A of the circuit board 3. The terminal storage portion 62 has a width and depth that allow the connection terminal 5 to be stored so as not to protrude outside the main body case 1 while storing the substantially flat connection terminal 5 in a posture parallel to the circuit board 3. Yes. As shown in FIG. 9, the terminal storage portion 62 has a groove shape that is substantially U-shaped in sectional view and can store the flat connection terminal 5. The groove-shaped terminal housing portion 62 has an inner shape in a cross section substantially equal to an outer shape in a cross section of the main body portion 5B of the connection terminal 5, and the main body portion 5B of the connection terminal 5 is guided to the terminal housing portion 62. In this state, the inside of the terminal accommodating portion 62 can be slid in the longitudinal direction. The bottom surface 63 of the terminal storage portion 62 is formed in a posture parallel to the circuit board 3 stored in the substrate storage portion 1B, so that the connection terminal 5 can be stored in a posture parallel to the circuit board 3. Yes.

  Further, as shown in FIGS. 3, 6, and 9, the terminal storage portion 62 is connected to the terminal of the connection terminal 5 on the inner surface of the distal end surface in order to hold the connection terminal 5 guided here in a fixed position. A fitting recess 64 for fitting the part 5 </ b> A is provided, and holding parts 65 for holding both side edges of the main body part 5 </ b> B of the connection terminal 5 are provided along the opening edge on the distal end side. The main body case 1 shown in the figure forms a holding portion 65 by providing eaves protruding inward along the opening edge of the terminal storage portion 62 facing each other. The holding portion 65, which is an eave, prevents the main body portion 5 </ b> B of the connection terminal 5 guided to the distal end portion of the terminal storage portion 62 from protruding in the opening direction, and stores the connection terminal 5 in the terminal storage portion 62. To do. The terminal storage portion 62 guides the connection terminal 5 from the opening to an area on the cable storage portion 61 side where the holding portion 65 is not provided, and then slides the connection terminal 5 in the distal direction along the inner surface of the terminal storage portion 62. Then, it is guided inside the holding portion 65. The connection terminal 5 guided to the distal end portion of the terminal storage portion 62 is inserted into the inner side of the eaves where the main body portion 5B is the holding portion 65, and the terminal portion 5A at the distal end is inserted into the insertion recess 64 to be in place. Retained.

  Further, the terminal storage portion 62 shown in FIGS. 3 and 6 includes a lock mechanism 66 that elastically locks the rear end of the connection terminal 5 arranged at a fixed position on the front end side. The lock mechanism 66 shown in the figure includes a locking hook 67 that elastically protrudes from the inside of the main body case 1 into the groove of the terminal storage portion 62, and this locking hook 67 is placed in the terminal storage portion 62. The rear end of the connection terminal 5 is locked by protruding. As shown in FIG. 5, the lock mechanism 66 includes an elastic arm 68 disposed inside the main body case 1, and a locking hook 67 provided at the tip of the elastic arm 68 is attached to the bottom surface of the terminal storage portion 62. The groove 63 is elastically projected into the groove from the through hole 63a opened in the hole 63a. The locking mechanism 66 locks the rear end of the connection terminal 5 with a lock hook 67 that elastically protrudes from the through hole 63a of the bottom surface 63 in a state where the connection terminal 5 is disposed at the tip of the terminal storage portion 62. Thus, the connection terminal 5 is held so as not to come off. When pulling out the connection terminal 5 from the terminal storage part 62, the locking hook 67 is elastically pulled into the inside of the main body case 1, and the connection terminal 5 is slid to the area on the cable storage part 61 side.

(Other examples)
The portable power supply device described above is provided with the opening 20 on the cable housing 4 side of the recess 10 and bends the cable housing 61 that extends to the end surface 1x of the main body case 1. Although the portion 61A and the open portion 20 of the hollow portion 10 are connected inside the end surface 1x, the portable power supply device includes the cable housing portion 261 and the hollow portion 210 as shown in FIG. 13 and FIG. It can also be opened to the end face 201x side without being connected inside 201x. The portable power supply device 200 shown in FIGS. 13 and 14 is opened only on the end surface 201x side without opening the recess 210 provided on the end surface 201x of the main body case 201 to the cable housing portion 261 side. That is, in the portable power supply device 200 shown in the figure, the shape of the recess 210 is substantially conical, and the inner surface of the opening on the end surface 201x side is chamfered so as to be a central convex curved surface. It is in the shape. 14 also includes a bush portion 207 that is divided into a first divided piece 271 and a second divided piece 272 inside the end surface of the main body case 201 to form a hollow portion 210. Yes. Further, in the illustrated portable power supply device 200, one end of the groove-shaped cable housing portion 261 extends to the end surface of the main body case 201, but opens to the end surface 201x without being bent in the radial direction.

The portable power supply device 200 having the above structure can also protect the lead-out part of the cable part 210 that is drawn out from the end face 201x and bent in the front-rear and left-right directions by the recess part 210 provided in the lead-out part of the cable part 4. As shown in FIG. 14, the cable portion 4 drawn from the end surface 201 x can be guided to the storage recess 206 in a curved state and stored in the main body case 201. In particular, the cable portion 4 and the connection terminal 5 housed in the housing recess 206 can be housed without protruding from the outer peripheral surface of the main body case 201.
In the portable power supply device shown in FIGS. 13 and 14, the same components as those in the portable power supply device according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

(Cover case 8)
The cover case 8 is a bottomed metal cylinder, and is slid in a state where the battery housing portion 1A of the main body case 1 is inserted, and is connected to the main body case 1 so as to be detachable. The cover case 8 is made of metal such as aluminum from the viewpoint of strength improvement and design. As described above, the structure in which the cover case 8 made of a member different from the main body case 1 is detachably attached to the main body case 1 has various colors and designs of the cover case 8 without changing the color and design of the main body case 1. By changing to, you can easily and easily arrange to the user's favorite appearance.

  In the portable power supply device 100, a cover case 8 is detachably attached to the battery housing part 1 </ b> A of the main body case 1. The main body case 1 shown in the figure has an outer peripheral surface of the battery storage portion 1A slightly narrower than an outer peripheral surface of the substrate storage portion 1B to form an insertion portion 14, and the insertion portion 14 is inserted into the cover case 8 to be inserted into the main body case 1. Is covered with a cover case 8. The main body case 1 shown in the figure is provided with a step 19 at the boundary between the outer peripheral surface of the substrate storage portion 1B and the insertion portion 14 into which the cover case 8 is inserted. The step 19 is substantially equal to the thickness of the metal forming the cover case 8, and the cover case 8 attached to the insertion portion 14 and the outer shape of the substrate storage portion 1 </ b> B when the cover case 8 is attached to the insertion portion 14. So that the outer shape is almost equal.

  The insertion portion 14 of the main body case 1 is provided with guide grooves 14a along the longitudinal direction on the upper and lower surfaces, and is configured to be slidable while guiding the guide convex portions 8a provided on the inner surface of the cover case 8. The guide protrusion 8a is a protrusion extending in the longitudinal direction. In the portable power supply device 100 shown in FIG. 7, the position of the guide groove 14 a is shifted asymmetrically between the upper surface and the lower surface of the insertion portion 14 so that the insertion posture of the cover case 8 can be specified. The guide groove 14a provided on the lower surface side of the insertion portion 14 is provided along the center of the lower surface, and the guide groove 14a provided on the upper surface side of the insertion portion 14 is provided unevenly on one side from the center of the upper surface. Therefore, the cover case 8 into which the insertion portion 14 is inserted also has the guide convex portion 8a at a position corresponding to the upper and lower guide grooves 14a. Thereby, the cover case 8 is inserted and connected to the insertion portion 14 only in a specific posture.

  Although the above-described portable power supply device 100 has a cylindrical outer shape, the main body case 1 and the cover case 8 are not completely circular, and as shown in FIGS. The flat surface 30 has a substantially cylindrical shape. The portable power supply device 100 with the main body case 1 and the cover case 8 having the above shape is stopped rolling in a posture in which the flat surface 30 is a lower surface without rolling with a roll while being placed on a flat surface. For this reason, even when the surface is placed on a smooth surface or a slightly inclined plane, the surface is stably held.

  Hereinafter, a circuit configuration constituted by electronic components mounted on the circuit board 3 will be described in detail with reference to FIG. FIG. 10 shows a block diagram of the portable power supply device 100. The portable power supply device 100 stabilizes the voltage of the secondary battery 2 charged by the charging circuit 31 to a predetermined voltage by charging the secondary battery 2 with the power input from the charging connector 34. A DC / DC converter 33, which is a discharge circuit 32 for outputting, is mounted on the circuit board 3.

(Charging circuit 31)
The charging circuit 31 charges the secondary battery 2 with electric power supplied from an external power source (charging adapter) 95 connected to the charging connector 34. When the external power supply 95 is connected to the charging connector 34, the charging circuit 31 can detect this from the input current or the input voltage. This is because when the external power supply 95 is connected to the charging connector 34, power is supplied from the charging connector 34 to the charging circuit 31. The charging circuit 31 charges the secondary battery 2 with this electric power in a state where electric power is input from the charging connector 34. In the portable power supply device in which the secondary battery 2 is a lithium ion secondary battery, the charging circuit 31 charges the secondary battery 2 by charging with constant current and constant voltage. Moreover, in the portable power supply device in which the secondary battery is a nickel metal hydride battery or a nickel cadmium battery, the charging circuit charges the secondary battery by constant current charging. Furthermore, the charging circuit 31 stops charging when the secondary battery 2 is charged to a predetermined capacity.

(Discharge circuit 32)
The discharge circuit 32 stabilizes the voltage of the secondary battery 2 to a predetermined voltage and outputs it. As such a discharge circuit 32, a DC / DC converter 33 which is a voltage adjustment circuit can be used. The discharge circuit 32 which is the DC / DC converter 33 converts the power supplied from the secondary battery 2 into an optimum voltage supplied to the externally connected portable device 90 and outputs the converted voltage. A portable power supply device 100 shown in FIG. 10 has a power switch 35 connected between the secondary battery 2 and the DC / DC converter 33. The power switch 35 is controlled to be turned on / off by the control circuit 36. In a state where the power switch 35 is turned on, the discharge circuit 32 is in an operating state when power is supplied from the secondary battery 2 and supplies stabilized power to the connection terminal 5 connected to the output side. In addition, when the power switch 35 is switched off, the discharge circuit 32 stops the power supply from the secondary battery 2 and becomes inoperative, and the power supply to the connection terminal 5 is stopped.

(Control circuit 36)
The control circuit 36 controls the power switch 35 to be turned on / off by a signal input from the operation switch 50, or switches the power switch 35 to off depending on the discharge state of the secondary battery 2. When an ON signal is input from the operation switch 50 for a certain period of time, the control circuit 36 turns on the power switch 35 and outputs the power of the secondary battery 2 to the discharge circuit 32. When the portable device 90 connected to the connection terminal 5 is removed, the control circuit 36 can detect that the portable device 90 has been removed from the connection terminal 5 using the output current. This is because the output current becomes 0 A when the portable device 90 is removed. When the portable device 90 is disconnected from the connection terminal 5, the control circuit 36 turns off the power switch 35 and stops the output from the secondary battery 2 to the discharge circuit 32.

  Furthermore, the control circuit 36 detects the battery temperature and controls charging / discharging of the secondary battery 2. The temperature of the secondary battery 2 is detected by a temperature sensor 39 fixed to the surface of the cylindrical secondary battery 2 in a thermally coupled state. Therefore, a temperature sensor 39 is connected to the control circuit 36. The control circuit 36 stores an allowable current with respect to the temperature of the secondary battery 2 and protects the secondary battery 2 by controlling a current for charging and discharging the secondary battery 2 to be smaller than the allowable current. In addition, the control circuit 36 can store a maximum temperature and a minimum temperature that allow charging / discharging of the secondary battery 2 and can perform control so as to allow charging / discharging between the maximum temperature and the minimum temperature.

(Remaining capacity detection circuit 37)
Furthermore, the circuit board 3 is also mounted with a remaining capacity detection circuit 37 that detects the remaining capacity of the secondary battery 2. The remaining capacity detection circuit 37 calculates the remaining capacity from the voltage of the secondary battery 2 and the battery current. A signal indicating the remaining capacity of the secondary battery 2 detected by the remaining capacity detection circuit 37 is input to the control circuit 36. The control circuit 36 controls the charging circuit 31 and the power switch 35 based on the signal input from the remaining capacity detection circuit 37. When the secondary battery 2 is charged to a predetermined capacity when the secondary battery 2 is charged, the control circuit 36 stops the charging circuit 31 and stops the charging of the secondary battery 2. In addition, when the secondary battery 2 is discharged, if the remaining capacity of the secondary battery 2 falls below a predetermined remaining capacity, the control circuit 36 turns off the power switch 35 to stop the discharge from the secondary battery 2. Thus, the secondary battery 2 is protected from overdischarge.

(Display unit 38)
Furthermore, the portable power supply device 100 includes a display unit 38 for externally displaying the state of charge of the externally connected portable device 90, the remaining capacity of the built-in secondary battery 2, and the like. A main body case 1 shown in FIGS. 1 and 6 has a structure in which a display window 54 is opened adjacent to an operation switch 50 provided on the upper surface, and light can be externally displayed through the display window 54. It is said. The display unit 38 shown in the figure is composed of a light emitting diode 55 mounted on the circuit board 3 and a light guide 56 for guiding the light from the light emitting diode 55 to the display window 54. As shown in FIG. 5, the light guide 56 disposed in the display window 54 guides a guide portion penetrating the light shielding sheet 57 to the display window 54, and radiates light emitted from the light emitting diode 55 to the outside through the light guide 56. It is possible to irradiate. The display unit 38 displays the remaining capacity by changing the light emitting diode 55 to the light emission color or the blinking state by the lighting circuit 58. When the operation switch 50 is operated, the display unit 38 lights the light emitting diode 55 based on the remaining capacity signal input from the control circuit 36 to the lighting circuit 38 and displays the remaining capacity.

(Operation switch 50)
Further, the portable power supply device 100 is provided with an operation switch 50 on the upper surface of the main body case 1. The main body case 1 shown in the figure is a surface of the second case 12, and a switch window 53 is opened at the center of the upper surface, and the operation buttons 51 of the operation switches 50 are arranged in the switch window 53. The operation button 51 shown in the figure is connected to the main body case 1 so as to be able to elastically move in and out of the main body case 1. The operation button 51 shown in FIG. 5 includes elastic arms 51B extending on both sides of the button main body 51A. The elastic arms 51B are fixed to the inner surface of the main body case 1, and the button main body 51A is elastic with respect to the main body case 1. It is structured to be able to enter and exit. Further, the button main body 51A includes a pressing portion on the back surface side, and the plunger of the push button switch 52 mounted on the circuit board 3 can be pressed by this pressing portion.

  For example, the operation switch 50 is turned on in a state where the connection terminal 5 is connected to the portable device 90 to be charged, thereby operating the discharge circuit 32 to start discharging from the secondary battery 2. Thereby, the power of the secondary battery 2 can be output from the connection terminal 5 and the built-in battery 92 built in the portable device 90 can be charged. Further, the operation switch 50 can function as an operation switch for displaying the remaining capacity of the secondary battery 2. The portable power supply device 100 displays the remaining capacity of the built-in secondary battery 2 on the display unit 38 by operating the operation switch 50 without connecting the connection terminal 5 to the external device 90, for example. Can do.

(Charging connector 34)
Furthermore, the portable power supply device 100 includes a charging connector 34 for charging the built-in secondary battery 2. As shown in FIGS. 5 and 8, the charging connector 34 is fixed to the circuit board 3 and is disposed at a position facing the connector window 47 opened in the main body case 1. The charging connector 34 shown in the figure is a USB connector. A charging connector 34 which is a USB connector is connected to a charging circuit 31 mounted on the circuit board 3. In this portable power supply device 100, a charging terminal (not shown) of an external power supply 95 such as an AC adapter is connected to the charging connector 34, and the secondary battery 2 is charged with power supplied from the external power supply 95. The portable power supply device 100 shown in FIGS. 5 and 8 includes an opening / closing lid 48 that closes the connector window 47 so as to be freely opened and closed. The open / close lid 48 shown in the drawing is connected to the main body case 1 so as to be freely drawn out, and the connector window 47 is opened in a state of being pulled out from the main body case 1. The portable power supply device 100 is connected to the charging connector 34 by inserting a charging terminal from the opened connector window 47. The open / close lid 48 is formed of a softer resin than the main body case 1, for example, an elastomer, and closes the connector window 47 so that it can be opened and closed to protect the charging connector 34 when not in use.

(Battery assembly)
In the circuit board 3 on which the above electronic components are mounted, the lead wire 41 of the cable portion 4 is connected by soldering or the like, and the secondary battery 2 is connected via the lead plate 49 so that the battery is assembled. Housed in the body case 1. The secondary battery 2 is physically connected and electrically connected to the circuit board 3 via the lead plate 49. The cylindrical secondary battery 2 has positive and negative end face electrodes connected to the circuit board 3 via a pair of lead plates 49. The cylindrical secondary battery 2 is arranged in the longitudinal direction of the circuit board 3 and connected linearly. The pair of lead plates 49 includes a first lead plate 49A connected to the end face electrode on the circuit board 3 side and a second lead plate 49B connected to the end face electrode on the opposite side. The first lead plate 49A includes a connecting portion connected to the end face electrode and a connecting piece connected to the circuit board 3 at both ends. The second lead plate 49 </ b> A includes a connection portion connected to the end face electrode and a connection piece connected to the circuit board 3 at both ends of the lead portion extending along the side surface of the secondary battery 2. These lead plates 49 are connected to the opposing end face electrodes of the secondary battery 2, and each connection piece is connected to both sides of the circuit board 3 to connect the secondary battery 2 to the circuit board 3. Electrical connection to The lead plate 49 is made of metal having excellent conductivity, for example, a copper plate or an aluminum plate.

  The portable power supply according to the present invention is carried along with a portable device, and when the battery of the portable device is discharged, the portable power supply device is connected to the portable device and charges the battery built in the portable device. It can be suitably used as an emergency power source.

DESCRIPTION OF SYMBOLS 100, 200 ... Portable power supply device 1,201 ... Main body case 1A ... Battery storage part 1B ... Board | substrate storage part 1x, 201x ... End surface 2 ... Secondary battery 3 ... Circuit board 3A ... First surface 3B ... Second surface 3a ... Positioning hole 4 ... Cable portion 5 ... Connecting terminal 5A ... Terminal portion 5B ... Main body portion 6, 206 ... Storage recess 7, 207 ... Bush portion 8 ... Cover case 8a ... Guide convex portion 10, 210 ... Dimple portion 11 ... First case 12 ... 2nd case 13 ... End wall 13A ... Opening part 14 ... Insertion part 14a ... Guide groove 15 ... Insertion groove part 16 ... Insertion recessed part 17 ... Groove-shaped rib 18 ... Cylindrical part 19 ... Step 20 ... Opening part 21 ... Joining rib 22 ... Junction recess 23 ... Locking rib 23A ... Locking hole 24 ... Locking protrusion 25 ... Supporting rib 26 ... Supporting rib 27 ... Positioning boss 28 ... Connecting boss 29 ... Set screw 30 ... Flat surface 31 ... Charging circuit 32 ... Discharging Circuit 33 ... DC / C converter 34 ... charge connector 35 ... power switch 36 ... control circuit 37 ... remaining capacity detection circuit 38 ... display unit 39 ... temperature sensor 41 ... lead wire 42 ... fixed block 42A ... fixed convex portion 42B ... convex portion 43 ... fixed portion 44 ... fixed part 45 ... rib 46 ... rib 47 ... connector window 48 ... opening / closing lid 49 ... lead plate 49A ... first lead plate 49B ... second lead plate 50 ... operating switch 51 ... operating button 51A ... button main body 51B ... elastic arm 52 ... push button switch 53 ... switch window 54 ... display window 55 ... light emitting diode 56 ... light guide 57 ... light shielding sheet 58 ... lighting circuit 61, 261 ... cable housing part 61A ... curved part 62 ... terminal housing part 63 ... bottom face 63a ... penetrating Hole 64 ... Insertion recess 65 ... Holding portion 66 ... Lock mechanism 67 ... Locking hook 68 ... Elastic arms 71, 271 ... First division 71A ... holding cylinder part 71B ... curved support part 72, 272 ... second divided piece 72A ... holding cylinder part 72B ... curved support part 73 ... connecting convex part 74 ... connecting concave part 75 ... fitting rib 76 ... fitting convex part 90 ... Portable device 92 ... Built-in battery 95 ... External power supply 302 ... Secondary battery 304 ... Cable 310 ... Main body 320 ... Cap part 320B ... Cap part 322 ... USB terminal m ... Center line

Claims (14)

A cylindrical secondary battery;
A cylindrical main body case extending in one direction for accommodating the secondary battery therein;
A flat circuit board mounted with a charging circuit that is electrically connected to the secondary battery and charges the secondary battery, and a discharge circuit for discharging the secondary battery;
A cable part that is pulled out from the end face of the main body case and provided with a connection terminal at the tip,
A portable power supply device comprising:
The area of each cross section of the cable portion and the connection terminal is smaller than 1/2 of the area of the cross section of the cylindrical main body case, respectively.
The main body case is divided in a longitudinal direction into a battery storage portion for storing the secondary battery and a substrate storage portion for storing the circuit board, and the cable portion is pulled out from an end surface of the substrate storage portion. And
Further, the main body case is formed on the first surface side of the circuit board while the circuit board is disposed in the longitudinal direction in the board housing portion at an approximate center of the cylindrical cross section. A portable power supply device, wherein a housing recess for housing the cable portion and the connection terminal is formed on the surface of the main body case. The portable power supply device according to claim 1,
A portable power supply device, wherein a hollow portion is formed on an end surface of the main body case, and the cable portion is drawn to the outside in the hollow portion. The portable power supply device according to claim 2,
The portable power supply device, wherein the hollow portion is formed by chamfering the inner surface of the opening on the end surface side into a curved surface having a central convex shape. The portable power supply device according to claim 2 or 3,
A portable power supply device comprising a bush portion covering the periphery of the cable portion inside an end surface of the main body case, and a recess portion formed on the end surface side of the bush portion. It is a portable power supply device of Claim 4, Comprising:
The portable power supply device, wherein the bush portion is made of a material softer than the main body case. The portable power supply device according to claim 4 or 5,
The portable power supply device, wherein the bush portion is configured to be divided into two so as to sandwich the cable portion. The portable power supply device according to any one of claims 2 to 6,
The storage recess includes a groove-shaped cable storage portion that stores the cable portion, and a terminal storage portion that is formed wider than the cable storage portion and stores the connection terminal.
The terminal storage portion is formed on the outer peripheral surface of the main body case along the first surface of the circuit board, and the cable storage portion is extended from the terminal storage portion to an end surface of the main body case. A portable power supply device. The portable power supply device according to claim 7,
A groove-like cable storage portion extended to the end surface of the main body case is curved in the radial direction of the cylindrical main body case on the inner side of the end surface and communicated with the recess portion. Portable power supply. The portable power supply device according to claim 7 or 8,
The cable part has a circular cross-sectional shape, and the connection terminal provided at the tip of the cable part has a substantially flat outer shape.
The cable storage portion has a substantially U-shaped cross-sectional groove shape into which the cable portion can be inserted, and the terminal storage portion has a substantially U-shaped cross-sectional view in which the connection terminal can be stored in a posture parallel to the circuit board. A portable power supply device having a groove shape. The portable power supply device according to any one of claims 1 to 9,
A portable power supply device characterized in that a drawing position of the cable portion on an end surface of the main body case is decentered from the center of the end surface so as to be away from the housing recess formed on one side of the circuit board. The portable power supply device according to any one of claims 1 to 10, further comprising:
A portable power supply device comprising a charging connector for charging the secondary battery. The portable power supply device according to any one of claims 1 to 11,
The portable power supply device, wherein the connection terminal is a lightning terminal. The portable power supply device according to any one of claims 1 to 12,
The portable power supply device, wherein the connection terminal is a USB terminal. The portable power supply device according to any one of claims 1 to 13,
A portable power supply device, wherein the secondary battery is a lithium ion secondary battery.

Images