JP2012059533A - Portable type power supply device, in which cylindrical battery can be built - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively avoid reverse insertion of a battery.SOLUTION: The portable type power supply device, in which a cylindrical battery CB can be built, comprises a first spring coil 31 formed by spirally bending a metallic wire; an insulation ring part 33 opening inside while covering a periphery of the first spring coil 31; and a second spring coil 32 connected with the first spring coil 31. The inside diameter of the opening of the ring part 33 is formed larger than the outside diameter of a convex-shaped electrode terminal TT, and the tip of the first spring coil 31 is exposed to the inside of the opening of the ring part 33. The inside diameter of the upper face coil of the second spring coil 32 is formed larger than the outside diameter of the convex-shaped electrode terminal TT. The first spring coil 31 is brought into contact with the convex-shaped electrode terminal TT of one of the parallely aligned cylindrical batteries CB, and the second spring coil 32 is brought into contact with a flat-shaped electrode terminal FT of the other of the parallely aligned cylindrical batteries CB.

Description

  The present invention relates to a portable power supply device that can incorporate a cylindrical battery, for example, a portable power supply device such as an emergency charger having a power connector for supplying power to an electronic device.

  With the spread of portable electronic devices such as mobile phones 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. So-called emergency and emergency chargers (also called “emergency charger” or “emergency charger”, “emergency power supply”, “boost”, etc.) have been developed. Many of such emergency chargers have a dedicated battery built-in, but in this configuration, it is necessary to charge the emergency charger in advance. If you forgot, there was a problem that you can not use.

  In order to solve such problems, there has been proposed an emergency charger in which a standardized battery such as an existing AA battery or AAA battery is replaceably incorporated. Here, if a rechargeable secondary battery such as a nickel metal hydride battery or nickel cadmium battery is used as the battery, it can be reused, and even if the battery capacity is exhausted, a spare secondary battery can be carried around or primary on the go The capacity can be replenished by purchasing a battery or a charged secondary battery.

  On the other hand, due to demands for higher functionality, higher output, and longer driving time of electric devices, power consumption has increased, and the capacity required of chargers has increased accordingly. In order to increase the output of such a charger, it is conceivable to increase the number of built-in batteries. Increasing the number of built-in batteries increases the output voltage by the number of batteries connected in series. However, on the other hand, it is conceivable that the batteries are set in the opposite direction. In particular, when the number of batteries increases, depending on the number of batteries in the opposite direction, for example, some of the built-in batteries that should be discharged may be It is conceivable that the battery is charged with the battery. Therefore, a structure that prevents such reverse insertion is required.

  A terminal structure has been developed that prevents the battery from being electrically connected when the battery is set in the opposite direction (Patent Documents 1 to 3). For example, in the terminal structure shown in Patent Document 1, as shown in FIG. 22, one of two sets of coil springs 90 wound so as to be tapered, the upper surface of the left coil spring in FIG. 91 is covered. The receiving member 91 has an opening at the center to open a receiving space. As shown in FIG. 23, the positive electrode terminal 92 of the battery is inserted therein to be electrically connected to the coil spring. When it is going to join, the conduction | electrical_connection with the negative electrode terminal 93 is prevented by the receiving member 91, and reverse insertion of a battery can be prevented.

  However, although this structure can prevent reverse insertion in the left coil spring, there is a problem in that such reverse insertion cannot be prevented in the right coil spring. That is, the terminal structure of FIG. 23 is intended to connect the positive terminal 92 to the left coil spring and the negative terminal 93 to the right coil spring, but even if an attempt is made to connect the negative terminal 93 to the left coil spring. On the other hand, conduction can be prevented by the receiving member 91 described above, and if the positive electrode terminal 92 is to be connected to the right coil spring, conduction is possible and reverse insertion by the right coil spring cannot be prevented.

  Further, it is necessary to fix the resin receiving member 91 to the tip of the coil spring so that it does not come off. In the structure of FIGS. 22 and 23, the coil spring is simply inserted into the groove 94 formed on the lower surface of the receiving member 91. There was a problem that the tip was only hooked and it was easy to come off. When the receiving member 91 is detached, the reverse insertion conduction preventing function is impaired. However, there is a problem that if the bonding or the insert molding is performed in order to securely fix, the manufacturing cost increases. Furthermore, in the U structure, there is a problem that only the terminal protruding in a convex shape (positive electrode terminal 92) can be conducted, and the reverse insertion of the flat negative electrode terminal 93 cannot be avoided.

Japanese Utility Model Publication 4-102561 JP-A-3-230472 JP 2002-184377 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 capable of incorporating a cylindrical battery that can effectively prevent reverse insertion of the battery with a simple and inexpensive structure.

Means for Solving the Problems and Effects of the Invention

  In order to achieve the above object, according to the portable power supply device capable of incorporating the cylindrical battery according to the first aspect of the present invention, it extends in one direction and protrudes in a convex shape on one end surface. On the other end face, two or more cylindrical batteries CB each having a substantially flat electrode terminal having a polarity different from that of the convex electrode terminal TT are arranged in a parallel and reverse posture. A bottomed cylindrical main body case 10 that can be housed inside in a closed state, and that is detachably closed at the opening of the main body case 10, and a closing surface 21 that faces the opening. A cap-side connecting terminal 27 for electrically connecting to the electrode terminals of the plurality of cylindrical batteries CB on the closing surface 21. A substantially cylindrical cap portion 20 provided with a screw and a metal wire The first spring coil 31 is bent into a plurality of coils and the contact surface between the first spring coil 31 and the electrode terminal of the cylindrical battery CB is surrounded by the first spring coil 31. An insulating ring portion 33 that opens while covering and a second spring coil 32 that is formed into a plurality of coils by bending a metal wire in a spiral shape and connected to the first spring coil 31. The ring portion 33 has an opening whose inner diameter is larger than the outer diameter of the convex electrode terminal TT, and the first spring coil 31 is The tip of the coil is exposed in the opening of the ring portion 33, and the second spring coil 32 is formed such that the inner diameter of the upper coil is larger than the outer diameter of the convex electrode terminal TT. The first spring coil 31 is brought into contact with the convex electrode terminals TT of one cylindrical battery CB arranged in parallel, and the second spring coil 32 is arranged in another cylindrical battery CB arranged in parallel. The flat electrode terminals FT can be configured to contact each other. As a result, it is only necessary to fix the ring part to the first spring coil, and the second spring coil can omit the ring part, and can exhibit any electrical connection blocking function at the time of erroneous insertion, thereby reducing the manufacturing cost. Is obtained.

  Further, according to the portable power supply device capable of incorporating the cylindrical battery according to the second side, the first spring coil 31 and the second spring coil 32 are integrally connected to form the case side connection terminal 30. it can. Thereby, a some cylindrical battery can be connected in series via a case side connection terminal.

  Furthermore, according to the portable power supply device that can incorporate the cylindrical battery according to the third aspect, the inner diameter of the first spring coil 31 decreases toward the contact surface with the electrode terminal of the cylindrical battery CB. it can. Thereby, the elasticity of the first spring coil can be stably exhibited.

  Furthermore, according to the portable power supply device that can incorporate the cylindrical battery according to the fourth aspect, the inner diameter of the upper coil of the second spring coil 32 can be made larger than the inner diameter of the intermediate coil. Accordingly, the inner diameter of the second spring coil can be changed to stably exhibit the elastic force, and the shape that is difficult to contact the convex electrode can be maintained.

  Furthermore, according to the portable power supply device capable of incorporating the cylindrical battery according to the fifth aspect, the ring portion 33 is inserted into the inner wall of the opening with the tip of the first spring coil 31 inserted. A locking recess 37 for locking is provided, and the tip of the first spring coil 31 can be inserted into the locking recess 37. Thereby, in the state which attached the ring part to the front-end | tip of a 1st spring coil, the advantage which can prevent effectively the situation where a ring part rotates and falls off is acquired.

  Furthermore, according to the portable power supply device capable of incorporating the cylindrical battery according to the sixth aspect, the cylindrical battery CB is further provided on the exposed surface 22 of the cap portion 20 and accommodated in the main body case 10. A power supply terminal 50 capable of outputting power is provided, and the power supply terminal 50 can be a standardized power connector. Thus, power can be supplied to a popular electronic device including a terminal that can be connected to a standardized or standardized terminal such as a USB terminal or a charging terminal of a mobile phone.

  Furthermore, according to the portable power supply device that can incorporate the cylindrical battery according to the seventh aspect, the power supply terminal 50 can be a USB terminal. As a result, it is possible to supply power to an electronic device that can supply power with a widely used USB terminal.

  Furthermore, according to the portable power supply device which can incorporate the cylindrical battery according to the eighth aspect, the cylindrical battery CB can be further provided. Thereby, a cylindrical battery is built in a main body case and can supply electric power to an electronic device.

  Furthermore, according to the portable power supply device that can incorporate the cylindrical battery according to the ninth aspect, the cylindrical battery CB can be a rechargeable secondary battery. Thereby, the rechargeable cylindrical battery is built in the main body case, and power can be supplied to the electronic device.

It is a perspective view which shows the portable power supply device which can incorporate the cylindrical battery which concerns on Example 1. FIG. It is the perspective view which looked at the portable power supply device of FIG. 1 from the back. FIG. 3 is an exploded perspective view showing a state where a cap part of the portable power supply device of FIG. 2 is removed and a battery is taken out. It is a horizontal sectional view in the IV-IV line of the portable power supply device of FIG. It is a perspective view which shows the state which removed the inner case from the portable power supply device of FIG. FIG. 6 is a further exploded perspective view of the portable power supply device of FIG. 5. It is the perspective view which looked at the state which attached the cap part to the lower case from the back. It is sectional drawing which shows the case side connection terminal which concerns on a modification. It is an expansion perspective view which shows a case side connection terminal. It is a three-plane figure which shows the 1st spring coil which mounted | wore the ring part. It is sectional drawing which shows the state which made the convex electrode terminal of the cylindrical battery contact the 1st spring coil of FIG. FIG. 10 is a cross-sectional view illustrating a state where a flat electrode terminal of a cylindrical battery is brought into contact with the second spring coil of FIG. 9. It is sectional drawing which shows the state which tries to connect the flat electrode terminal of a cylindrical battery accidentally to the 1st spring coil of FIG. It is sectional drawing which shows the state which attaches a ring part to a 1st spring coil. It is sectional drawing which shows the 1st spring coil which mounted | wore the ring part which concerns on a modification. 6 is a perspective view showing a case side connection terminal according to Embodiment 2. FIG. It is a perspective view of the ring part shown in FIG. It is the perspective view which looked at the ring part of Drawing 17 from the back. FIG. 10 is a cross-sectional view illustrating a state in which a convex electrode terminal of a cylindrical battery is erroneously connected to the second spring coil of FIG. 9. It is sectional drawing which shows the state which made the flat electrode terminal of the cylindrical battery contact the 2nd spring coil which concerns on a modification. It is sectional drawing which shows the state which tries to connect the convex electrode terminal of a cylindrical battery accidentally to the 2nd spring coil shown in FIG. It is a perspective view which shows the conventional electrode structure. It is sectional drawing of the electrode structure of FIG. It is a perspective view which shows the receiving member of FIG.

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 that can incorporate a cylindrical battery for embodying the technical idea of the present invention, and the present invention can incorporate a cylindrical battery. The portable power supply is not specified 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 21 show a portable power supply device that can incorporate a cylindrical battery according to a first embodiment. In these drawings, FIG. 1 is a perspective view showing a portable power supply device 100 that can incorporate a cylindrical battery according to Embodiment 1, and FIG. 2 is a perspective view of the portable power supply device 100 of FIG. 3 is an exploded perspective view showing a state in which the cap portion 20 of the portable power supply device 100 of FIG. 2 is removed and the battery is taken out. FIG. 4 is a horizontal sectional view taken along line IV-IV of the portable power supply device 100 of FIG. 5 is a perspective view showing a state where the inner case is removed from the portable power supply device 100 of FIG. 2, FIG. 6 is a further exploded perspective view of the portable power supply device 100 of FIG. 5, and FIG. FIG. 8 is a cross-sectional view showing a case side connection terminal 30B according to a modification, FIG. 9 is an enlarged perspective view showing the case side connection terminal 30, and FIG. Three views showing the mounted first spring coil 31 11 is a cross-sectional view showing a state in which the convex electrode terminal TT of the cylindrical battery CB is in contact with the first spring coil 31 of FIG. 10, and FIG. 12 is a plan view of the cylindrical battery CB with respect to the second spring coil 32 of FIG. FIG. 13 is a sectional view showing a state in which the flat electrode terminal FT of the cylindrical battery CB is erroneously connected to the first spring coil 31 of FIG. 14 is a cross-sectional view showing a state in which the ring portion 33 is attached to the first spring coil 31, FIG. 15 is a cross-sectional view showing the first spring coil 31 having the ring portion 33B according to a modification, and FIG. FIG. 17 is a perspective view of the ring portion 33C shown in FIG. 16, FIG. 18 is a perspective view of the ring portion 33C of FIG. 17 as viewed from the back, and FIG. Two springs FIG. 20 is a cross-sectional view showing a state in which the convex electrode terminal TT of the cylindrical battery CB is erroneously connected to the coil 32. FIG. 20 shows a flat electrode terminal FT of the cylindrical battery CB to the second spring coil 32 according to the modification. FIG. 21 is a sectional view showing a state in which the convex electrode terminal TT of the cylindrical battery CB is erroneously connected to the second spring coil 32 shown in FIG. ing.

  A portable power supply device 100 capable of incorporating a cylindrical battery shown in FIGS. 1 to 4 includes a main body case 10 and a cap portion 20. The main body case 10 has a hollow cylindrical shape, and a plurality of cylindrical batteries CB can be inserted and housed from the opening in a state of being arranged in parallel. The cap unit 20 is connected and fixed in a state in which the cylindrical battery CB is housed in the main body case 10 and the opening of the main body case 10 is closed. At this time, the cylindrical batteries CB connected in series are electrically connected to the circuit board 38 via the case side connection terminals 30 and the cap side connection terminals 27. The series voltage of the cylindrical battery CB is converted into a predetermined output voltage to be output from the power supply terminal 50 by the voltage conversion circuit mounted on the circuit board 38.

  As shown in FIG. 1, the cap unit 20 is provided with a power supply terminal 50 on the end face and a power supply switch 26 on the top surface. The power supply terminal 50 is connected to the plug PG of the electronic device ED to be supplied with power. The power supply is started by turning on. Thereby, it becomes possible to drive the electronic device ED and charge the battery built in the electronic device ED.

This portable power supply device 100 has a total length obtained by adding the length of the cap portion 20 to the length obtained by connecting two built-in cylindrical batteries CB in the vertical direction, and the shape of the main body is a cylindrical battery CB. The diameter of the stick is slightly thicker than the diameter of the stick, and it has a stick shape with a minimum size. The small size and light weight are advantageous for carrying. Such a portable power supply device 100 is also required to have design characteristics since it is always carried, and in particular, a design sense suitable for making a portable electronic device fashionable is also required. The portable power supply device 100 with a rod-like and simple design as shown in FIGS. 1 and 2 can satisfy such a requirement. Hereinafter, details of each member will be sequentially described.
(Main body case 10)

  The body case 10 is formed in a bottomed cylindrical shape extending in the connecting direction of the cylindrical battery CB as shown in FIGS. 3, 5, and 6, and opens in one direction from which the cylindrical battery CB is inserted. Store in. The overall length is determined according to the number of connected cylindrical batteries CB, and the inner diameter is minimum so that the cylindrical batteries CB can be smoothly inserted in parallel and the stored cylindrical battery CB does not rattle inside. The size of Here, as shown in FIG. 4, the clearances of the inner diameter, outer diameter, and total length are designed so that a total of four AA batteries can be accommodated, one by two vertically, one by two. The

  As shown in FIGS. 5 to 7, the main body case 10 includes an inner case 12 and an outer case 11. The outer case 11 is made of metal such as aluminum from the viewpoint of improvement in strength and design. Further, the inner case 12 is made of an insulating member in order to maintain insulation of the built-in cylindrical battery CB. For example, the inner case 12 is made of a resin such as plastic. The inner case 12 is divided into an upper case 13 and a lower case 14. Here, when the main body case is divided into two, it is not always necessary to bisect the case. For example, in the inner case 12 shown in FIG. The part excluding the part is configured to be equally divided into half with the upper case 13. In this configuration, by integrating the connecting portion with the cap portion 20, the strength of the portion to which a load is applied during the connection can be increased and the reliability can be improved.

After the upper case 13 and the lower case 14 are connected to obtain the inner case 12, the inner case 12 is inserted into the open end of the outer case 11 to form the main body case 10. At this time, as shown in FIGS. 5 and 6, a concave insertion slit 18 is provided on the outer surface of the inner case 12 along the extending direction of the inner case 12, while the insertion slit 18 is formed on the inner surface of the outer case 11. A convex insertion protrusion to be inserted is provided. As a result, the inner case 12 is positioned and inserted and fixed to the outer case 11.
(Cylindrical battery CB)

  Cylindrical battery CB is provided with electrodes on both end faces, electrode terminal TT (generally a positive electrode terminal) protruding in one end face, and substantially flat electrode terminal FT on the other end face. (Generally, a negative electrode terminal) is provided. As such a cylindrical battery CB, an existing battery can be used. Preferably, a rechargeable secondary battery can be used repeatedly by charging. A nickel metal hydride battery is particularly suitable, but a nickel cadmium battery or a lithium ion battery may be used. Also, a commercially available primary battery can be used. For example, when battery capacity is exhausted, it is possible to use a commercially available battery that can be obtained and purchased relatively easily, thereby improving convenience. To do.

  The convex electrode terminal TT of the cylindrical battery CB generally uses a positive electrode terminal, and the flat electrode terminal FT generally uses a negative electrode terminal. However, depending on the type of battery, a configuration in which the polarity of the electrode terminal is reversed is employed. In this case, the convex electrode terminal of the negative electrode terminal is the first spring coil 31 and the flat electrode terminal of the positive electrode terminal is the second. Needless to say, the spring coil 32 can be connected to each other. In the present specification, an example using a cylindrical battery CB in which the convex electrode terminal TT is a positive electrode terminal and the flat electrode terminal FT is a negative electrode terminal will be described.

  The portable power supply device 100 according to the present embodiment does not have a secondary battery charging function, but only a discharging function. For this reason, recharging of a secondary battery is performed using a commercially available charger. However, it goes without saying that a secondary battery charging function may be added. In this case, the circuit board 38 is mounted with a charging circuit that converts the voltage required for charging, and an input terminal for receiving charging power from the outside is provided. By adding such a member, it is inevitable that the external shape of the portable power supply device becomes somewhat larger and the cost increases. Therefore, these are added according to required specifications and costs.

In the example of FIGS. 3 and 4, two AA batteries are connected in series in the length direction as cylindrical batteries CB, and two sets of these are arranged in parallel in opposite orientations, and connected on the case side. It is accommodated in the case in a state of being connected in series via the terminal 30. However, the number of cylindrical batteries CB is not limited to four, and may be two or three or more. In the modification of FIG. 8, the example of the case side connection terminal 30B which connects four cylindrical batteries in 2 series 2 parallel is shown. Moreover, not only an AA battery but an AAA battery or a battery of a larger size can be used. In addition to the configuration in which two different types of coil springs of the first spring coil 31 and the second spring coil 32 are connected side by side, two first spring coils 31 or two second spring coils 322 are arranged side by side. Also good. In this case, adjacent coil springs are connected in parallel connection, and in the case of series connection, one coil spring is connected to the cap-side connection terminal.
(Case side connection terminal 30)

  Case-side connection terminals 30 are provided on the bottom surface of the lower case 14. As shown in the perspective view of FIG. 9, the case side connection terminal 30 includes a first spring coil 31 and a second spring coil 32 having a ring portion 33 fixed to the upper surface. The first spring coil 31 and the second spring coil 32 are formed integrally by bending a metal wire in a spiral shape. Each spring coil is wound spirally so that the elastic force can be maintained. In this case, the elastic force can be more stably exhibited not by winding the coil with the same diameter but by winding the coil so that the inner diameter of the coil is gradually narrowed or widened.

As shown in FIGS. 4, 10, 11, and 12, the case side connection terminal 30 includes a first spring coil 31 on the positive terminal side of the cylindrical battery CB, and a second spring coil 32 on the negative terminal side. Each is configured to connect. Further, even if the first spring coil 31 is erroneously connected to the negative terminal side or the second spring coil 32 is connected to the positive terminal side, a reverse insertion conduction preventing function for preventing conduction is provided.
(Ring 33)

  Specifically, as shown in FIG. 10, the first spring coil 31 covers the ring portion 33 at the tip. The ring portion 33 is made of an insulating member, for example, a resin such as plastic. The ring portion 33 opens the inside while covering the periphery of the first spring coil 31. In the opening of the ring portion, the tip of the first spring coil 31 is exposed, and when the positive electrode terminal of the cylindrical battery CB is brought into contact with the first spring coil 31, the convex electrode terminal TT of the positive electrode terminal becomes the ring portion. It penetrates into the opening and is brought into contact with the metal wire exposed here. For this reason, as shown in FIG. 9 and the like, the metal wire at the tip of the first spring coil 31 is a straight portion 36 that is bent at an acute angle from the winding direction curved in an arc shape toward the center near the terminal end. The linear portion 36 constitutes a contact portion with the positive electrode terminal.

On the other hand, even if the negative electrode terminal of the cylindrical battery CB is mistakenly connected to the first spring coil 31, as shown in FIG. 13, the ring portion 33 comes into contact with the flat electrode of the negative electrode terminal. Contact with 31 is blocked by the ring portion 33, and conduction is inhibited. Thus, the 1st spring coil 31 provided with the ring part 33 implement | achieves the reverse insertion conduction | electrical_connection prevention function which makes only a positive electrode terminal conduct | electrically_connect and blocks | prevents conduction | electrical_connection when a negative electrode terminal is contacted.
(Locking recess 37)

  As shown in FIGS. 9 and 10, the ring portion 33 is provided with a locking recess 37 for inserting and locking the tip of the first spring coil 31 on the inner surface of the ring portion opening. The locking recess 37 does not penetrate the side wall of the opening of the ring portion, and is opened only on the inner surface side, and is formed in a size that allows the tip of the metal wire to be inserted. And the front-end | tip of the 1st spring coil 31 is inserted from the inner surface side of a ring part opening, and the ring part 33 is fixed to the 1st spring coil 31. FIG. Thus, by inserting and holding the tip of the first spring coil 31 in the ring portion 33, it is possible to effectively prevent the ring portion 33 from rotating and falling off from the first spring coil 31.

  Also, with this configuration, the work of mounting the ring portion 33 on the first spring coil 31 is performed by inserting the first spring coil 31 from the lower surface side of the ring portion 33 as shown in FIG. It can be fitted as shown in FIG. This operation is extremely simple and excellent in workability. For example, in the conventional example shown in FIGS. 22, 23, and 24, it is necessary to insert the tip of the wire into the notch 95 from the outer surface side of the receiving member 91, and the receiving member 91 shown in FIG. Combined with the formation of the groove 94, the wire must be elastically deformed and inserted into the concave groove 94, and the tip must be inserted into the notch 95, which is very troublesome for mounting. It was. On the other hand, in the above embodiment, such a work is not required, and it is sufficient to simply insert the tip of the wire from the lower surface side of the ring portion 33 and lock the tip to the locking recess 37, which is extremely simple. The advantage of being able to be mounted in a short time is obtained.

  Further, the linear portion 36 at the tip of the first spring coil 31 is used as a connection portion with the positive terminal, and is also used as a stopper that prevents the ring portion 33 from falling off the first spring coil 31. That is, conventionally, as shown in FIG. 22, in order to use the tip of the spring coil as a connection portion with the positive electrode terminal, the coil tip, which is a metal wire, is bent toward the positive electrode terminal side and is continuously bent by its elasticity. The coil tip is configured to be pressed toward the positive terminal. In this configuration, the tip of the metal wire needs to be a free end. In other words, the tip of the metal wire cannot be used for fitting the receiving member 91.

  On the other hand, in the present embodiment, contrary to such a conventional technique, the tip of the metal wire is used for the fitting structure with the ring portion 33 and is inserted into the locking recess 37 opened on the inner surface of the ring portion opening. Thus, the connection between the ring portion 33 and the first spring coil 31 is made strong.

  On the other hand, in order to maintain the elasticity of the first spring coil 31, that is, to press the first spring coil 31 to the positive terminal side with high reliability, in the present embodiment, the inner diameter of the coil is increased toward the upper surface. By making it smaller, the elastic force is exerted. Further, according to the test by the inventors of the present application, in the configuration in which the tip of the metal wire is protruded and brought into contact with the positive electrode terminal, elasticity is easily lost due to plastic deformation only at one place of the metal wire. In this embodiment, the metal wire tip can be contacted in a more parallel posture because the tip of the metal wire is slanted so that the tip protrudes and becomes point contact. And the first spring coil 31 can be linearly contacted to increase the contact area, and the first spring coil 31 itself is spirally wound so that the inner diameter of the coil is gradually reduced. It was found that the elastic force can be exerted permanently, and it was confirmed that the case side connection terminal is not inferior to the conventional terminal structure in terms of reliability.

  On the other hand, in order to maintain the elasticity of the first spring coil 31, that is, to press the first spring coil 31 to the positive terminal side with high reliability, in the present embodiment, the inner diameter of the coil is increased toward the upper surface. By making it smaller, the elastic force is exerted. Further, in the configuration in which the tip of the metal wire is projected and brought into contact with the positive electrode terminal, the elasticity is easily lost due to plastic deformation only at one bending of the metal wire, and the tip of the metal wire is made to project the tip. In this embodiment, the tip of the metal wire can be contacted in a posture that is closer to parallel with respect to the point contact being inclined, etc., so that the positive electrode terminal and the first spring coil 31 are in contact with each other as a linear contact. By increasing the area and spirally winding the first spring coil 31 itself so that the inner diameter of the coil gradually decreases, sufficient elastic force can be exerted permanently, and the conventional terminal structure is not inferior. It can be considered as a case side connection terminal.

In the example of FIG. 10 and the like, the locking concave portion 37 is opened on the side in contact with the positive terminal. In particular, in the example of FIG. 9, the upper surface of the locking recess 37 is not opened and a cut is provided in an L-shaped cross section on the inner surface of the ring portion so that the inserted metal wire tip does not fall out. However, the locking recess 37 does not necessarily need to be provided with an opening communicating with the upper surface of the ring portion 33 as described above. As shown in the cross-sectional view of FIG. 15, the locking recess 37B is opened only on the inner surface side, The upper surface side can also be closed.
(Example 2)

Further, in the above example, the ring portion is an integral product formed by resin molding, but the ring portion may be divided into two parts. For example, in the case side connection terminal 30C according to the second embodiment shown in FIGS. 16 to 18, the ring portion 33C is divided around the fulcrum 34 and is opened and closed in a swinging manner, and is positioned on the upper surface of the first spring coil 31C. The coil to be clamped is fixed from both sides. In addition, with the ring portion 33C closed, the tips of the ring portion 33C can be locked with the hooks 35 provided on the upper and lower surfaces of the ring portion 33C, and can be maintained in a fixed state so as not to open. With this configuration, the work of attaching the ring portion 33C to the first spring coil 31C is simpler, and the coil tip is completely sandwiched and fixed from the left and right, so that it is possible to prevent disengagement after attachment, and reliability is also improved. high. Furthermore, in the example of FIG. 16, the metal wire tip of the second spring coil 32C is bent downward. As a result, the tip portion protrudes to contact the electrode terminal of the cylindrical battery CB, avoiding a point contact state, making contact in a wide area on the upper surface of the second spring coil 32C, and reducing contact resistance.
(Second spring coil 32)

  Contrary to the first spring coil 31, the second spring coil 32 is configured to conduct only with the negative terminal and not with the positive terminal. Specifically, as shown in FIGS. 9 and 12, the diameter of the second spring coil 32 is formed so as to increase toward the upper side, that is, the end face electrode side of the cylindrical battery CB. The inner diameter of the second spring coil 32 on the upper surface is made sufficiently larger than the outer diameter of the positive electrode terminal. With this configuration, the upper surface of the second spring coil 32 can be brought into contact with the negative electrode terminal, which is a flat electrode, to be conducted. On the other hand, if the positive electrode terminal side is accidentally brought into contact with the second spring coil 32, the inner diameter of the second spring coil 32 is sufficiently larger than the outer diameter of the positive electrode terminal as shown in FIG. The two spring coils 32 are not in contact with each other and are not conducted. As described above, the reverse insertion conduction preventing function can be added to the second spring coil 32 only by a very simple change of changing the shape of the second spring coil 32.

  As described above, according to the embodiment, the first spring coil 31 and the second spring coil 32 are asymmetric, so that unlike the conventional terminal structure, not only the first spring coil 31 but also the second spring coil 32. A reverse insertion conduction blocking function can be provided. That is, in the prior art, as shown in FIGS. 22 and 23, etc., the two spring coils are formed in the same shape, so that the wire is bent at the center of the spring coil to be in contact with the positive terminal. Therefore, it is impossible to avoid a situation in which the spring coil not provided with the receiving member 91 is erroneously connected to the positive terminal. On the other hand, in the present invention, by changing the shape of the spring coil, not only the positive terminal but also the negative terminal is successfully provided with a reverse insertion conduction preventing function. In addition, by making the appearances of the first spring coil 31 and the second spring coil 32 different, it is possible to reduce the situation that the left and right are mistaken at the time of assembly.

Similarly to the first spring coil 31, if the second spring coil 32 is formed so that the inner diameter of the ring is gradually reduced, there is a possibility that the second spring coil 32 may come into contact with the positive electrode terminal. Therefore, as shown in FIGS. 12 and 19, the ring gradually increases in inner diameter, or like the second spring coil 32D shown in FIGS. 20 and 21, the center becomes narrower and both end faces become wider. Make a drum. Alternatively, the inner diameter of the coil may be substantially constant.
(Anti-rotation rib 39)

In addition, the ring portion 33C is provided with an anti-rotation rib 39 that prevents relative rotation between the ring portion 33C and the first spring coil 31C so as not to be disengaged from the first spring coil 31C. As shown in FIGS. 17 to 18, the rotation prevention rib 39 is a pair of protrusions protruding toward the center at the opening of the ring portion 33 </ b> C, and a straight line at the tip of the first spring coil 31 </ b> C between these protrusions. The shaped portion 36 is formed so that it can be inserted. With this configuration, the ring portion 33C attached to the first spring coil 31C is prevented from rotating in the horizontal plane by the rotation prevention rib, and as a result, a situation in which the ring portion 33C is detached from the first spring coil 31C can be avoided.
(Cap part 20)

As shown in FIGS. 1 to 4 and the like, the cap part 20 has a rectangular shape with a substantially semi-circular side surface that has substantially the same cross-sectional shape as the main body case 10, and one of the cylindrical end faces faces the opening. The closed surface 21 is the surface to be exposed, and the opposite side is the exposed surface 22 that is exposed to the outside. As described above, the power supply switch 26 is provided on the cylindrical side surface. In addition, the power supply terminal 50 is provided on the exposed surface 22, and the closing surface 21 is provided with a connecting mechanism for detachably attaching to the opening of the main body case 10. The coupling mechanism has a cylindrical shape that is continuous to the same surface after the cap portion 20 and the main body case 10 are connected, and in order to obtain sufficient coupling strength, the closing surface 21 is in contact with the opening edge of the main body case 10. A connecting cylinder 23 is provided on the contact surface and on the inner side of the contact surface.
(Cap side connection terminal 27)

  A cap-side connection terminal 27 that is brought into contact with one electrode of the cylindrical battery CB at the time of connection is provided on the end surface of the connection cylinder 23. In the example of FIG. 7, the cap-side connection terminal 27 is a rectangular metal plate 27a on the side in contact with the positive terminal, and a protruding terminal 27b in which a wire is bent on the side in contact with the negative terminal. 3, 4, and 6, four cylindrical batteries CB <b> 1 to 4 are inserted into the main body case 10, two on each side, and the tip of the cylindrical battery CB inserted first is connected to the case side connection terminal. 30. At this time, the positive terminal is inserted into the first spring coil 31 and the negative terminal is inserted into the second spring coil 32 so as to contact each other. Then, the positive electrode of the first cylindrical battery CB1 inserted earlier is brought into contact with the first spring coil 31, the negative electrode of the second cylindrical battery CB2 is brought into contact with the second spring coil 32, and the third cylindrical battery inserted later. The negative terminal of the battery CB3 is in contact with the protruding terminal 27b of the cap-side connection terminal 27, and the positive terminal of the fourth cylindrical battery CB4 is in contact with the metal plate 27a.

As described above, by using a spring coil for the case-side connection terminal 30, a spring can be disposed on the coupling mechanism side between the cap portion 20 and the main body case 10, and further, the clearance in the length direction of the cylindrical battery can be achieved with this spring. In addition, the effect of increasing the frictional resistance and ensuring the connection can be obtained by applying stress from the vertical direction to the engaging portion of the coupling mechanism.
(Circuit board 38)

A circuit board 38 is disposed inside the cap portion 20. The circuit board 38 is a flat glass epoxy board, and electronic components such as a voltage conversion circuit for converting the voltage of the cylindrical battery CB are mounted on the front and back surfaces. As the voltage conversion circuit, a DC / DC converter that stabilizes and outputs the output voltage of the cylindrical battery CB can be suitably used.
(Substrate holder 40)

In order to hold the circuit board 38, a board holder 40 is provided inside the cap portion 20. The substrate holder 40 has a circuit board 38 and a power supply terminal 50 placed on the upper surface, a cap-side connection terminal 27 held on the back surface, and a mechanical for electrically connecting the cap-side connection terminal 27 to the circuit board 38. Responsible connection.
(Power supply terminal 50)

  The power supply terminal 50 can supply power to more electronic devices adopting this standard by using a standardized power connector. In the first embodiment, a USB terminal A type is adopted as the power supply terminal 50. In recent years, there are many electronic devices that use the USB terminal as a power supply port and many connection adapters for supporting the USB terminal. By using this, it is possible to supply power to many electronic devices. In addition, a USB terminal B type may be employed. The power supply terminal 50 is opened in a rectangular shape in the width direction of the exposed portion. In addition, a power supply switch 26 for instructing start of power supply is provided on the cylindrical side surface of the cap unit 20.

  In the above-described embodiment, the example in which the USB terminal is directly provided on the exposed surface of the cap portion as the power supply terminal has been described. However, the present invention is not limited to this configuration. For example, a standardized power supply terminal other than the USB terminal or a terminal designed exclusively for an electronic device can be provided. Alternatively, such a USB terminal or a dedicated terminal can be extended from the exposed surface via a cable. In this configuration, even if it is difficult to directly insert / remove the portable power supply device to / from the electronic device, it can be connected via the cable, and the convenience of handling can be improved. For example, when charging with a mobile phone in the breast pocket, the rod-shaped portable power supply is bulky and inconvenient, so insert the portable power supply into the inner pocket of the jacket and connect it via a cable. Can be connected to a mobile phone.

  A portable power supply device capable of incorporating a cylindrical battery according to the present invention is an emergency charger for charging a mobile phone or a portable music player using a standardized battery such as an AA battery or an AAA battery, Or it can utilize suitably as a charger for charging an emergency charger.

DESCRIPTION OF SYMBOLS 100, 200 ... Portable power supply device 10 ... Main body case 11 ... Outer case 12 ... Inner case 13 ... Upper case 14 ... Lower case 18 ... Insertion slit 20 ... Cap part 21 ... Closure surface 22 ... Expressing surface 23 ... Connecting cylinder 26 ... Feed switch 27 ... cap side connection terminal; 27a ... metal plate; 27b ... protruding terminals 30, 30B, 30C ... case side connection terminals 31, 31C ... first spring coils 32, 32C, 32D ... second spring coils 33, 33B , 33C ... ring portion 34 ... fulcrum 35 ... hook 36 ... linear portion 37, 37B ... locking recess 38 ... circuit board 39 ... rotation prevention rib 40 ... substrate holder 50 ... power supply terminal 90 ... coil spring 91 ... receiving member 92 ... Positive terminal 93 ... Negative terminal 94 ... Concave groove 95 ... Notch CB ... Cylindrical battery; CB1 ... First cylindrical battery; CB2 ... Second cylindrical battery CB3 ... third cylindrical battery; CB4 ... fourth cylindrical cell ED ... electronic device; PG ... plug; TT ... convex electrode terminals; FT ... flat electrode terminal

Claims (9)

Extending in one direction, one end face is provided with a protruding electrode terminal, and the other end face is provided with a substantially flat electrode terminal having a polarity different from that of the convex electrode terminal (TT). A cylindrical case (10) having a bottomed cylindrical shape that can be accommodated inside with two or more cylindrical batteries (CB) arranged in parallel and in opposite orientations;
The opening of the main body case (10) is detachably closed, the closing surface (21) facing the opening, and the surface facing the closing surface (21) and exposed to the outside (22), and the closed surface (21) is provided with a cap-side connection terminal (27) for electrical connection with the electrode terminals of a plurality of cylindrical batteries (CB). 20) and
A first spring coil (31) configured by bending a metal wire in a spiral shape into a plurality of coils,
An insulating ring portion (33) that opens inside while covering the periphery of the first spring coil (31) at the contact surface between the first spring coil (31) and the electrode terminal of the cylindrical battery (CB). )When,
A second spring coil (32) bent in a spiral shape, configured in a plurality of coils, and connected to the first spring coil (31);
A portable power supply device capable of incorporating a cylindrical battery comprising:
The ring portion (33) is formed such that the inner diameter of the opening is larger than the outer diameter of the convex electrode terminal (TT),
The first spring coil (31) has a coil tip exposed in the opening of the ring portion (33),
The second spring coil (32) is formed such that the inner diameter of the upper coil is larger than the outer diameter of the convex electrode terminal (TT),
The first spring coil (31) is brought into contact with the convex electrode terminal (TT) of one cylindrical battery (CB) arranged in parallel,
The second spring coil (32) is brought into contact with a flat electrode terminal (FT) of another cylindrical battery (CB) arranged in parallel.
A portable power supply device capable of incorporating a cylindrical battery, characterized in that each is configured. A portable power supply device capable of incorporating the cylindrical battery according to claim 1,
The first spring coil (31) and the second spring coil (32) are integrally connected to form a case side connection terminal (30). Power supply. A portable power supply device capable of incorporating the cylindrical battery according to claim 1 or 2,
The first spring coil (31) is a portable power supply device capable of incorporating a cylindrical battery, characterized in that the inner diameter of the coil decreases toward the contact surface with the electrode terminal of the cylindrical battery (CB). . A portable power supply device capable of incorporating the cylindrical battery according to any one of claims 1 to 3,
The portable power supply apparatus capable of incorporating a cylindrical battery, wherein the second spring coil (32) is formed such that an inner diameter of an upper coil is larger than an inner diameter of an intermediate coil. A portable power supply device capable of incorporating the cylindrical battery according to any one of claims 1 to 4,
The ring portion (33) is provided with a locking recess (37) for inserting and locking the tip of the first spring coil (31) in a part of the inner wall of the opening,
A portable power supply apparatus capable of incorporating a cylindrical battery, wherein the tip of the first spring coil (31) is configured to be inserted into the locking recess (37). A portable power supply device capable of incorporating the cylindrical battery according to any one of claims 1 to 5, further comprising:
Provided on the exposed surface (22) of the cap part (20), provided with a power supply terminal (50) capable of outputting the power of the cylindrical battery (CB) stored in the main body case (10),
A portable power supply apparatus capable of incorporating a cylindrical battery, wherein the power supply terminal (50) is a standardized power connector. A portable power supply device capable of incorporating the cylindrical battery according to claim 6,
A portable power supply device capable of incorporating a cylindrical battery, wherein the power supply terminal (50) is a USB terminal. A portable power supply device capable of incorporating the cylindrical battery according to any one of claims 1 to 7, further comprising:
A portable power supply capable of incorporating a cylindrical battery, characterized by comprising a cylindrical battery (CB). A portable power supply device capable of incorporating the cylindrical battery according to claim 8,
A portable power supply apparatus capable of incorporating a cylindrical battery, wherein the cylindrical battery (CB) is a rechargeable secondary battery.

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