JP2012221853A - Battery carrying case having charging function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conveniently carry a standard battery to be charged under a setting condition, and prevent bad influences on a battery due to heat.SOLUTION: A battery carrying case comprises: a casing 2 having a detachable mounting part 23, to which a battery 1 to be charged can be detachably set, and having a planar bottom plate 22A, in which a power feeding coil 95 is built and which is located on a charging stand 90 for conveying power by an electromagnetic induction action and charging the battery; a circuit board 4, on which a charging circuit 30 for charging the battery 1 set to the detachable mounting part 23 of the casing 2 is mounted; and a power reception coil 5 connected to the charging circuit 30 of the circuit board 4, electromagnetically coupled to the power feeding coil 95 of the charging stand 90, and receiving the power from the power feeding coil 95. While the carrying case is located on the charging stand 90, the power reception coil 5 is electromagnetically coupled to the power feeding coil 95, and the power of the power feeding coil 95 is received by the power reception coil 5. Therefore, the battery 1 is charged by the charging circuit 30 with the power introduced by the power reception coil 5.

Description

  The present invention relates to a carrying case for carrying a rechargeable battery and having a charging function that can be charged while the battery is stored.

  The conventional charger is designed for charging a battery, and cannot be used as a carrying case for carrying the charged battery in a set state. This is because the battery charger is too large, and the thick and long power cord is connected, which makes it bulky and convenient to carry. The reason why the charger is large is that a charging circuit such as a circuit for converting commercial power into direct current and a DC / DC converter for stepping down direct current to a predetermined voltage are incorporated. By the way, a charger incorporating a built-in battery and a charging circuit has been developed. (See Patent Document 1)

JP 2010-98861 A

  Since this charger includes a built-in battery, power can be supplied to the outside using the built-in battery. That is, it can be used in the same manner as a rechargeable battery. This charger is mounted on a charging stand with a built-in power transmission coil and has a built-in power receiving coil that receives power from the power transmission coil of the charging stand, and charges the built-in battery with the power induced in the power receiving coil. Since this charger receives power from the charging stand by magnetic induction and charges the built-in battery, it does not require a long power cord and can be carried conveniently. However, since this charger cannot charge standard batteries such as AA batteries or AAA batteries, there is a drawback that its use is limited.

  Further, as shown in the cross-sectional view of FIG. 1, the charger 200 is housed in the casing 202 so that the power receiving coil 205 and the built-in battery 201 are stacked, so that the built-in battery 201 adversely affects the heat generation of the power receiving coil 205. There are drawbacks. In particular, in order to quickly charge the internal battery 201, it is necessary to increase the current of the power receiving coil 205, and the heat generation of the power receiving coil 205 increases. The temperature of the built-in battery 201 also increases as it approaches full charge. Therefore, in this state, the built-in battery 201 whose temperature has risen is in a state in which the heat-receiving coil 205 is heated, so that there is a drawback that it is not possible to effectively prevent adverse effects such as deterioration due to heat on the battery.

  Further, as shown in the block diagram of FIG. 2, the charger includes an output circuit such as a DC / DC converter 206 for stabilizing the output of the internal battery 201 in addition to the charging circuit 203 for charging the internal battery 201. Since 204 is also built in, there is a drawback that the charging circuit 203 and the output circuit 204 cannot be made small and inexpensive.

The present invention has been developed for the purpose of solving the above-mentioned drawbacks. An important object of the present invention is that it can be set and charged so that standard batteries such as AA batteries and AAA batteries can be attached and detached, and can be conveniently carried in a state in which a battery to be charged is set in a compact size. The object is to provide a battery carrying case having a function.
Furthermore, another important object of the present invention is to provide a battery carrying case having a charging function capable of quickly charging while preventing adverse effects of heat on the set battery.

Means for Solving the Problems and Effects of the Invention

  The battery carrying case having the charging function of the present invention has a built-in power transmission coil 95, is placed on a charging base 90 for carrying and charging power by electromagnetic induction, receives power from the charging base 90, The battery 1 that is detachably set with the received power is charged. The battery carrying case includes a casing 2 having a detachable mounting portion 23 on which a battery 1 to be charged can be detachably set and a flat bottom plate 22A placed on a charging stand 90, and detachable mounting of the casing 2 The circuit board 4 on which the charging circuit 30 for charging the battery 1 set in the unit 23 is mounted, and the charging circuit 30 of the circuit board 4 connected to the circuit board 4 and electromagnetically coupled to the power transmission coil 95 of the charging base 90 to be transmitted. And a power receiving coil 5 for receiving electric power. In the state where the carrying case is placed on the charging stand 90, the power receiving coil 5 is electromagnetically coupled to the power transmitting coil 95, the power of the power transmitting coil 95 is received by the power receiving coil 5, and the charging circuit with the power induced in the power receiving coil 5. 30 charges the battery 1.

  The above battery carrying case can be set and recharged so that standard batteries such as AA batteries and AAA batteries can be attached and detached, and can be conveniently carried around with the batteries to be recharged compactly. There is. The battery carrying case includes a circuit board on which a charging circuit is mounted and a receiving coil that receives electric power from a power transmission coil of a charging stand in a casing having a detachable mounting part in which a battery to be charged can be detachably set. This is because the battery is charged with the electric power induced in the power receiving coil that is electromagnetically coupled to the power transmitting coil of the charging stand. This carrying case receives the electric power carried from the charging stand by the built-in power receiving coil, so there is no need to provide an external connection body such as a connector, and the surface of the casing is clean with no irregularities for providing the external connection body. Appearance can be made. Further, since this carrying case does not require an external connection body, there is no adverse effect such as corrosion due to moisture entering the external connection body from the outside or contact failure due to dust, unlike a carrying case having a conventional external connection body. In addition, the battery can be charged with peace of mind, and the battery can be carried and carried as it is with the battery set.

In the carrying case of the battery having a charging function according to the present invention, the casing 2 is arranged between the circuit board 4 and the bottom plate 22A while the circuit board 4 is disposed between the attachment / detachment mounting portion 23 and the bottom plate 22A. The power receiving coil 5 is arranged close to the bottom plate 22 </ b> A, and a heat blocking gap 26 for heat blocking between the power receiving coil 5 and the circuit board 4 can be provided between the power receiving coil 5 and the circuit board 4. .
The battery carrying case described above is characterized in that the set battery can be charged quickly while preventing adverse effects due to heat. That is, the above carrying case arranges the circuit board between the attachment / detachment part of the battery and the bottom plate of the casing, and between the circuit board and the bottom plate, and close to the bottom plate, the receiving coil This is because a heat blocking gap is provided between the power receiving coil and the circuit board. This carrying case can effectively prevent adverse effects due to heat generation of the power receiving coil by the heat blocking gap provided between the power receiving coil and the circuit board.

The battery carrying case having a charging function according to the present invention has a cushioning material 7 disposed between the power receiving coil 5 and the circuit board 4, and the cushioning material 7 makes the power receiving coil 5 elastic toward the bottom plate 22A. Can be pressed closely to the bottom plate 22A.
The battery carrying case described above is provided with a cushioning material disposed between the power receiving coil and the circuit board so that the power receiving coil is in close contact with the bottom plate, so that a predetermined heat blocking gap is provided between the power receiving coil and the circuit board. However, the power receiving coil can be securely attached to the bottom plate.

In the battery carrying case having a charging function of the present invention, the circuit board 4 can fix the heat generating component 18 on the opposite side of the surface facing the power receiving coil 5.
In the battery carrying case described above, the heat generating component is fixed to the power receiving coil 5 side opposite to the battery side, so that the heat generation of the heat generating component can be blocked by the circuit board. For this reason, the heat generating component does not heat the battery, and the battery can be rapidly charged quickly under a more preferable temperature condition.

In the battery carrying case having a charging function according to the present invention, the casing 2 has the opening / closing lid 20 that opens and closes the attachment / detachment mounting portion 23, and the ventilation gap 24 that ventilates the attachment / detachment attachment portion 23 with the opening / closing lid 20 closed. be able to.
The battery carrying case described above can cool the battery through the ventilation gap and prevent the temperature from rising while closing the open / close lid of the attaching / detaching part to prevent the battery from being detached from the attaching / detaching part.

  In the battery carrying case having the charging function of the present invention, the batteries 1 set in the attachment / detachment mounting portion 23 can be AA batteries 1A and AAA batteries 1B.

  In the carrying case of the battery having the charging function of the present invention, the battery 1 set in the detachable mounting portion 23 can be a nickel metal hydride battery.

1 is a vertical sectional view of a charging device for a portable electronic device previously filed by the present applicant. It is a block circuit diagram of the charging device of the portable electronic device which the present applicant applied for earlier. It is a perspective view of the carrying case of the battery which has a charging function concerning one Example of this invention. FIG. 4 is a cross-sectional perspective view taken along line IV-IV of the battery carrying case shown in FIG. 3. FIG. 5 is a cross-sectional view taken along line VV of the battery carrying case shown in FIG. 3. It is a perspective view which shows the state which accommodates a battery in the carrying case of the battery shown in FIG. It is a disassembled perspective view of the carrying case of the battery shown in FIG. It is the disassembled perspective view which looked at the carrying case of the battery shown in FIG. 7 from the lower side. It is sectional drawing which shows the state which set the AA battery in the carrying case of the battery shown in FIG. It is sectional drawing which shows the state which set the AAA battery in the carrying case of the battery shown in FIG. It is an expanded sectional view which shows the detection contact of the state which set the AA battery in the battery mounting part. It is an expanded sectional view which shows the detection contact of the state which set the AAA battery in the battery mounting part. It is a disassembled perspective view which shows the state which sets the carrying case shown in FIG. 3 to a charging stand. It is a disassembled perspective view which shows the state which set the carrying case shown in FIG. 3 to the charging stand. It is the XV-XV sectional view of the carrying case and charging stand shown in FIG. It is a block of the carrying case and charging stand shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below illustrate a battery carrying case having a charging function for embodying the technical idea of the present invention, and the present invention does not specify the battery carrying case as follows. . Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The carrying case of the battery having a charging function according to the embodiment of the present invention shown in FIGS. 3 to 12 is set and carried so that the rechargeable battery 1 can be detached. Furthermore, the carrying case 100 is placed on a charging stand when charging the battery 1, receives electric power from the charging base in a contactless manner, and charges the set battery 1 with the received electric power.

  As shown in FIGS. 13 to 16, the charging stand 90 includes a power transmission coil 95 that supplies power to the carrying case 100 by magnetic induction. The carrying case 100 includes a power receiving coil 5 that is electromagnetically coupled to the power transmitting coil 95 and a charging function 3 that charges the battery 1 by converting alternating current induced in the power receiving coil 5 into direct current.

  The charging stand 90 shown in FIGS. 13 to 16 includes an AC power supply 93 that supplies AC power to the power transmission coil 95, and an exterior case 92 that houses the AC power supply 93 and the power transmission coil 95. The exterior case 92 is provided with a planar mounting plate 96 on which the carrying case 100 is detachably mounted. In the charging stand 90 shown in FIGS. 13 and 14, the outer shape of the mounting plate 96 is made larger than the outer shape of the carrying case 100. The charging stand 90 can stably set the carrying case 100 on the mounting plate 96. The charging stand 90 has a power transmission coil 95 disposed on the lower surface of the mounting plate 96. The power transmission coil 95 is fixed along the lower surface of the mounting plate 96 or is arranged so as to move along the lower surface of the mounting plate 96.

  The exterior case 92 that fixes the power transmission coil 95 displays the position of the power transmission coil 95, in other words, the position where the carrying case 100 is set, and efficiently transmits power from the power transmission coil 95 to the power reception coil 5 by magnetic induction. Transport. The mounting plate 96 in FIG. 13 displays the set position indicating the position on which the carrying case 100 is placed as a graphic 97 so that the carrying case 100 is disposed at a normal set position. The exterior case 92 of FIG. 13 displays a set position by printing a graphic 97 showing the outer shape of the carrying case 100 on the upper surface of the mounting plate 96. The charging stand 90 can be placed at a normal set position by setting the carrying case 100 in accordance with the outer shape of the figure 97. Further, the mounting plate 96 shown in FIG. 13 displays a plurality of set positions printed as a graphic 97 so that a plurality of types of carrying cases can be arranged at the correct set positions. The charging stand 90 has a feature that various carrying cases can be set at an accurate position.

  Although the charging stand in which the power transmission coil moves along the lower surface of the mounting plate is not shown, it detects the position of the power receiving coil which is a charging function of the carrying case set on the mounting plate so as to approach the power receiving coil. Move the power transmission coil. The charging stand of this structure does not specify the position where the carrying case is set. This is because the power transmission coil can be brought close to the power receiving coil of the carrying case set at any position on the mounting plate, and power can be efficiently conveyed by magnetic induction.

  The power transmission coil 95 is a flat coil wound in a spiral shape so that it can be horizontally disposed under the mounting plate 96. The power transmission coil can be fixed by insert molding on a plastic mounting plate. The charging stand on which the power transmission coil is placed on the plate can be thinned as a whole. In addition, while firmly fixing the power transmission coil to the exterior case, the power transmission coil is arranged so as to approach the surface of the mounting plate, and the distance from the power reception coil 5 is narrowed so that AC power is efficiently supplied to the power reception coil 5. Can be transmitted. The inductance of the power transmission coil 95 is set to an optimum value depending on the frequency of the AC power. For example, a power transmission coil having a frequency of supplied AC power of 100 kHz to 500 kHz has an inductance of several tens of μH to several mH. However, the charging stand does not specify the frequency of the AC power supplied to the power transmission coil in this range. This is because AC power having a frequency lower than 100 kHz or higher than 500 kHz can be supplied to the power transmission coil, and power can be conveyed to the carrying case by magnetic induction. The inductance of the power transmission coil is small when the frequency of the AC power is high, and is large when the frequency is low, so that power can be efficiently transferred to the power reception coil by magnetic induction.

  The AC power supply 93 converts the input power into AC having a frequency to be supplied to the power transmission coil 95 and outputs the AC. The AC power supply 93 receives DC from the AC adapter 99 or DC from a connector such as a USB connector. The AC power supply 93 can also input an AC commercial power supply, convert the AC power into an AC having a frequency to be supplied to the power transmission coil 95, and output the AC. The alternating current power supply 93 converts the input direct current or alternating current into alternating current having a predetermined frequency and voltage and outputs the alternating current to the power transmission coil 95. An AC power supply 93 that inputs DC power from the AC adapter 99 or the connector converts DC power into AC power by a DC / AC inverter and outputs the AC power. An AC power source that inputs AC from a commercial power source converts AC to DC by a rectifier circuit, converts DC output from the rectifier circuit to AC by a DC / AC inverter, and outputs the AC to a power transmission coil.

  The AC power supply 93 detects that the carrying case 100 is set, or the user turns on a power switch (not shown) and outputs AC power to the power transmission coil 95. The AC power supply 93 that detects the carrying case 100 includes a detection circuit (not shown) for the power receiving coil 5 provided in the carrying case 100. Further, the AC power supply 93 detects that the battery 1 of the carrying case 100 is fully charged, and stops the output of AC power from the power transmission coil 95. The AC power supply 93 detects a current change in the power transmission coil 95 to detect full charge of the battery 1. When the battery 1 of the carrying case 100 is fully charged, the power receiving coil 5 is unloaded and the current in the power receiving coil 5 is almost cut off. When the current of the power receiving coil 5 is substantially interrupted, the current of the power transmitting coil 95 is also reduced. Therefore, the AC power supply 93 can detect that the current of the power transmission coil 95 has become smaller than the set value and can detect that the battery 1 of the carrying case 100 is fully charged.

  The battery carrying case 100 has a detachable mounting portion 23 on which a battery 1 to be charged can be set detachably, a casing 2 having a flat bottom plate 22A placed on a charging base 90, and a detachable mounting of the casing 2 A charging function 3 for charging the battery 1 set in the unit 23. The charging function 3 includes a power receiving coil 5 that is electromagnetically coupled to the power transmitting coil 95 of the charging base 90 and receives power from the power transmitting coil 95, and charging that charges the battery 1 by converting alternating current induced in the power receiving coil 5 into direct current. Circuit 30. The charging circuit 30 is mounted on the circuit board 4 and is built in the bottom of the casing 2.

  As shown in FIG. 6, the casing 2 is provided with a detachable mounting portion 23 for setting the battery 1 so that the battery 1 can be detached, and an opening / closing lid 20 is opened and closed so as to open and close the opening of the detachable mounting portion 23. Provided. The casing 2 shown in FIGS. 3 to 8 includes an opening / closing lid 20 formed of a transparent or translucent plastic so that the battery 1 set in the attachment / detachment mounting portion 23 can be confirmed from the outside in a closed state. A plastic upper case 21 connected so that the opening / closing lid 20 can be opened and closed, and a plastic lower case 22 connecting the upper case 21 are provided.

  The upper case 21 has a detachable mounting portion 23 on the upper surface. The detachable mounting portion 23 is provided with two rows of vertical grooves 23A in which AA batteries 1A, which are standard batteries, can be set in two rows. Charging terminals 10 that contact the positive and negative electrodes of the battery 1 set here are disposed at both ends of the vertical groove 23A. The carrying case 100 shown in the figure has one charging terminal 10A as a rotation terminal 11 so that both the AA battery 1A and the AAA battery 1B can be charged. The rotary terminal 11 is rotated 90 degrees between a horizontal posture and a vertical posture so as to be in contact with the electrodes of the AA battery 1A and the AAA battery 1B. As shown in FIG. 9, the rotary terminal 11 is in contact with the electrode of the AA battery 1A in a state where it is raised vertically, and as shown in FIG. 10, the electrode of the AA battery 1B is brought down in a horizontal position. To touch.

  As shown in FIGS. 7 to 10, the rotary terminal 11 is fixed to the rotary body 12, which is disposed at one end of the attachment / detachment mounting portion 23 so as to be rotatable in a vertical plane, and to the surface of the rotary body 12. And a contact terminal 13 that contacts the electrode of the battery 1. Since the carrying case 100 shown in the figure is charged by mounting two batteries 1, the rotating body 12 is provided with two contact terminals 13. The two contact terminals 13 are arranged in parallel to each other so as to face the two rows of vertical grooves 23A.

  As shown in FIG. 7, the rotating body 12 is connected to the upper case 21 via the rotating shafts 12 </ b> X on both sides so that the rotating body 12 can be rotated 90 degrees between a horizontal posture and a vertical posture. The upper case 21 is provided with a set recess 21S for disposing the rotating body 12 at one end of the attachment / detachment mounting portion 23, and a shaft hole 21X for inserting the rotating shaft 12X of the rotating body 12 into the inner surfaces on both sides of the set recess 21S. Is provided. The rotating body 12 has a shape and a size that allows the AA battery 1A to be stored in the battery mounting portion 23 in a state where it is raised vertically, and allows the end 4 battery 1B to be stored in the battery mounting portion 23 in a state where it is tilted horizontally.

  As shown in FIGS. 7 and 8, the contact terminal 13 is formed by forming a metal plate into a shape along the surface of the rotating body 12. The contact terminal 13 in the drawing is processed into a shape having a substantially U-shaped cross section, more precisely, an end portion disposed on the contact window 21T side having an arc shape. As shown in FIGS. 9 to 12, the contact terminal 13 includes a front end surface of the rotating body 12 (upper end surface in FIGS. 9 and 11), one side surface (right side surface in FIGS. 9 and 11), and a rear surface. It arrange | positions at an end surface (lower end surface in FIG.9 and FIG.11). In the vertical posture shown in FIG. 9, the rotary terminal 11 charges the AA battery 1A by bringing the electrode of the AA battery 1A into contact with the contact terminal 13 located on the side surface, and in the horizontal posture shown in FIG. The AAA battery 1B is charged by bringing the electrode of the AAA battery 1B into contact with the contact terminal 13 located at the position.

  Further, the rotary terminal 11 connects an elastic contact 14 fixed to the circuit board 4 to the contact terminal 13 in order to connect the contact terminal 13 to the circuit board 4 in the vertical posture and the horizontal posture. The upper case 21 in the figure opens a contact window 21T penetrating the upper case 21 at the bottom surface of the set recess 21S in order to connect the contact terminal 13 fixed to the rotating body 12 to the elastic contact 14. The rotating terminal 11 connects the contact terminal 13 to the circuit board 4 by elastically bringing the elastic contact 14 fixed to the circuit board 4 into contact with the contact terminal 13 in the contact window 21T.

  Further, the rotary terminal 11 shown in the figure can be stopped in a state where the vertical posture and the horizontal posture are moderate. The upper case 21 shown in FIGS. 4 and 15 is integrally formed with an elastic arm 21U that elastically presses the rear end portion of the rotating body 12, and a locking hook is provided at the distal end portion of the elastic arm 21U. 21Y is provided. Furthermore, a locking projection 12Y positioned by the locking hook 21Y is provided at the rear end of the rotating body 12. In the vertical posture and the horizontal posture, the rotating body 12 is stopped in an accurate posture by engaging the locking hook 21Y pressed by the elastic arm 21U with the locking projection 12Y.

  The opening / closing lid 20 is integrally formed with a rotating shaft 20E at one end, and is connected to the upper case 21 via the rotating shaft 20E so as to be tilted. The opening / closing lid 20 is provided with side walls 20B on both sides of the top plate 20A and end walls 20C on one end so that the battery 1 can be arranged inside. The side walls 20B on both sides of the top plate 20A have an extension portion 20D extending at one end toward the upper case 21, and the extension portion 20D is provided with a rotating shaft 20E protruding inward. The upper case 21 is provided with a bearing recess 21E that is inserted so as to be able to rotate the rotating shaft 20E and a recess 21D that guides the extension 20D. The rotary shaft 20E is guided to the bearing portion 21E, and the opening / closing lid 20 is connected to the upper case 21 so that it can be opened and closed.

  Further, the opening / closing lid 20 is provided with a notch 20F at the lower edge of the side wall 20B on both sides, and the notch 20F is provided with a ventilation gap 24 for ventilating the attachment / detachment attachment 23 in a closed state. The opening / closing lid 20 of FIG. 3 is provided with a notch 20F in a region excluding both ends of the side wall 20B. Further, the casing 2 of FIGS. 3 to 8 is provided with a step portion 21F that is formed to be low on the outer wall 21B outside the longitudinal groove 23A provided in the upper case 21. In the casing 2, the stepped portion 21 </ b> F of the upper case 21 and the cutout portion 20 </ b> F of the opening / closing lid 20 are provided with a wide ventilation gap 24 in the vertical direction to cool the battery 1 more efficiently. The step portion 21F of the upper case 21 and the cutout portion 20F of the opening / closing lid 20 are provided at the same position so as to be opposed to each other in the vertical direction, thereby widening the ventilation gap 24.

  The lower case 22 is provided with a peripheral wall 22B around the planar bottom plate 22A, and connects the peripheral wall 22B to the periphery of the upper case 21. The lower case 22 in FIGS. 5 and 7 is provided with a locking hook 22G on the inner surface of the upper end portion of the peripheral wall 22B. The upper case 21 has a locking portion 21G for guiding the locking hook 22G. It is provided opposite to 22G. The lower case 22 and the upper case 21 are connected by a locking structure by guiding the locking hook 22G to the locking part 21G. Further, the upper case 21 and the lower case 22 shown in FIG. 5 and FIG. In order to connect the set screw 19 by screwing, the lower case 22 protrudes from the inner surface of the bottom plate 22A and is integrally formed with an insertion boss 22H through which the set screw 19 is inserted. A connecting boss 21H into which the set screw 19 is screwed is integrally formed so as to protrude from the inner surface of the plate 22A. The set screw 19 is inserted into the insertion boss 22H from an insertion recess 22J provided on the lower surface of the lower case 22, passes through the lower case 22, and is screwed into the connecting boss 21H to connect the upper case 21 and the lower case 22. . Further, a label (not shown) is attached to the surface of the lower case 22 so that the insertion recess 22J into which the set screw 19 is inserted cannot be seen from the outside.

  The lower case 22 and the upper case 21 are connected to each other to provide a storage space 25 that is closed inside. The storage space 25 contains the circuit board 4 and the power receiving coil 5. The storage space 25 of the casing 2 is configured such that the circuit board 4 is disposed between the attachment / detachment mounting portion 23 provided in the upper case 21 and the bottom plate 22A of the lower case 22, and the circuit board 4 and the bottom plate 22A are arranged. A power receiving coil 5 is disposed between them. Further, the carrying case 100 shown in the figure has a shield plate 6 laminated on the circuit board 4 side of the power receiving coil 5. The shield plate 6 shields the circuit board 4 from the alternating magnetic field induced in the power receiving coil 5. The lower case 22 in FIG. 7 is provided with a circular recess 22K that can receive the power receiving coil 5 on the inner surface of the bottom plate 22A so that the outer shape of the power receiving coil 5 arranged on the bottom plate 22A can be enlarged. Therefore, as shown in FIG. 8, the lower case 22 is provided with circular protrusions 22 </ b> L that are curved in a shape along the outer shape of the circular recess 22 </ b> K on both sides of the center portion of the lower surface. Since the power receiving coil 5 is disposed on the inner side of the circular protrusion 22L, the circular protrusion 22L also serves as a mark for displaying the position of the power receiving coil 5 when the carrying case 100 is set on the charging base 90.

  The power receiving coil 5 is a planar coil obtained by winding a wire in a spiral shape on a plane. The power receiving coil 5 of this planar coil has a spiral shape wound in one layer or a plurality of layers, the entire shape is a disk shape, and the outer shape is circular.

  The circuit board 4 is disposed so as to be stacked on the power receiving coil 5, and a shield plate 6 is disposed between the circuit board 4 and the power receiving coil 5. The shield plate 6 shields the circuit board 4 from the alternating magnetic field induced in the power receiving coil 5. The shield plate 6 and the power receiving coil 5 are fixed with an adhesive or a double-sided tape.

  As shown in FIG. 16, the circuit board 4 is mounted with a charging circuit 30 that charges the battery 1 by converting alternating current induced in the power receiving coil 5 into direct current. The charging circuit 30 includes a rectifying circuit 31 that rectifies the alternating current induced in the power receiving coil 5 and converts it into direct current, and a smoothing capacitor 32 that smoothes the pulsating current rectified by the rectifying circuit 31. Yes. The charging circuit 30 charges the battery 1 set in the detachable mounting portion 23 with a preferable current and voltage. A carrying case 100 in which a standard battery set in the detachable mounting portion 23 is an alkaline battery such as a nickel metal hydride battery or a nickel cadmium battery includes a constant current circuit 33 in which the charging circuit 30 charges the battery 1 with a constant current. For example, the constant current circuit 33 sets the charging current to a current that rapidly charges the fully discharged AA battery 1A in about 3 hours. The standard battery set in the detachable mounting portion 23 differs in the full charge capacity between the AA battery 1A and the AAA battery 1B. Therefore, the constant current circuit 33 includes a switching circuit 34 that charges the AA battery 1A and the AAA battery 1B with different currents. The switching circuit 34 detects the rotational position of the rotary terminal 11, detects the AA batteries 1A and the AAA batteries 1B, and sets the charging current to the optimum current.

  The switching circuit 34 fixes a detection contact 35 to the circuit board 4 as shown in FIGS. 7, 11, and 12 in order to detect the rotational position of the rotary terminal 11. The detection contact 35 is an elastic wire and has one end fixed to the circuit board 4. The rotary terminal 11 is provided with a detection terminal 36 that contacts the detection contact 35 in a horizontal posture and does not contact the detection contact 35 in a vertical posture. The detection terminal 36 in the figure also uses the contact terminal 13 that is a metal terminal that contacts the positive electrode of the battery 1. In the state in which the AA battery 1A is charged with the rotary terminal 11 in the vertical posture, the switching circuit 34 is in a state in which the detection contact 35 does not contact the detection terminal 36 and charges the AAA battery 1B with the rotary terminal 11 in the horizontal posture. Then, the detection contact 35 contacts the detection terminal 36. Therefore, the switching circuit 34 determines that the AAA battery 1B is in the state where the detection contact 35 is in contact with the detection terminal 36, and uses the charging current of the constant current circuit 33 as the charging current of the AAA battery 1B. In the state where it does not contact the detection terminal 36, it is determined that the AA battery 1A, and the charging current of the constant current circuit 33 is set as the charging current of the AA battery 1A.

  Furthermore, the charging circuit 30 detects the full charge of the battery 1 and interrupts the charging current. The charging circuit 30 which uses a standard battery as a nickel metal hydride battery or a nickel cadmium battery detects the voltage of the battery 1 to be charged and detects full charge. When the battery 1 is fully charged, the voltage of the battery 1 increases to the peak voltage and decreases by ΔV from the peak voltage. Therefore, the charging circuit 30 detects the ΔV decrease from the peak voltage of the battery 1 and the peak voltage. Detect full charge.

  The circuit board 4 has the heat generating component 18 of the charging circuit 30 fixed to the opposite side of the surface facing the power receiving coil 5. The heat generating component 18 is an element through which the current of the power receiving coil 5 flows or an element through which the charging current of the battery 1 flows. The element through which the current of the receiving coil 5 flows is a diode of the rectifier circuit 31, an FET that realizes a synchronous rectifier circuit, or the like. The element through which the charging current of the battery 1 flows is a semiconductor element such as an FET or a transistor that realizes the constant current circuit 33.

  The circuit board 4 is an elongated quadrangle having a size to be fitted inside the peripheral wall 22B of the lower case 22, and is fixed to the inner side of the peripheral wall 22B of the lower case 22. The circuit board 4 of FIG. 7 is provided with positioning notches 4M at the four corners so as to be arranged at a fixed position of the lower case 22. The lower case 22 is provided with positioning projections 22M that fit into the positioning cutouts 4M, which are integrally formed at the four corners. In this structure, the circuit board 4 can be arranged at a fixed position of the casing 2 by guiding the positioning convex part 22M of the lower case 22 to the positioning notch part 4M of the circuit board 4. Furthermore, the circuit board 4 of FIG. 7 is provided with a positioning recess 4N at one end so that the circuit board 4 can be arranged in the lower case 22 in the correct orientation. The lower case 22 is integrally formed with positioning ribs 22N that guide the positioning recesses 4N of the circuit board 4 so as to protrude to the inside of the peripheral wall 22B. With this structure, the positioning rib 22N of the lower case 22 can be guided to the positioning recess 4N of the circuit board 4, and the circuit board 4 can be arranged at a fixed position in the casing 2 in the correct orientation. Further, the circuit board 4 is provided with a through hole 4H that penetrates the connecting boss 21H provided in the upper case 21 at the center.

  Further, as shown in FIG. 4, the circuit board 4 disposed at a fixed position of the lower case 22 has a predetermined distance from the bottom plate 22A so that a predetermined space is formed between the circuit board 4 and the bottom plate 22A of the lower case 22. Separated. The lower case 22 shown in FIGS. 4 and 7 is provided with a plurality of support portions 22P for supporting the lower surface of the circuit board 4 on the outer peripheral portion. Further, as shown in FIGS. 4 and 5, the lower case 22 supports the lower surface of the peripheral portion of the through hole 4H provided in the central portion of the circuit board 4 also on the upper surface of the insertion boss 22H. Therefore, in the lower case 22, the insertion boss 22H and the support portion 22P are integrally formed so that the upper end surfaces of the insertion boss 22H and the support portion 22P are on the same plane. The lower case 22 described above supports the lower surface of the circuit board 4 with the upper end surfaces of the insertion boss 22H and the support portion 22P, and provides a predetermined space between the circuit board 4 and the bottom plate 22A.

  Further, the circuit board 4 is fixed at a fixed position by connecting the upper case 21 to the lower case 22 in a state of being disposed at a fixed position inside the lower case 22. That is, the circuit board 4 is sandwiched between the lower case 22 and the upper case 21 and fixed at a fixed position in the storage space 25 as shown in FIG. As shown in FIGS. 5 and 8, the upper case 21 in FIG. 7 is provided with a plurality of pressing protrusions 21 </ b> P and 21 </ b> Q that press the upper surface of the circuit board 4 so as to protrude from the inner surface. The upper case 21 shown in the drawing is provided with a pressing projection 21P at the center of the inner surface of the outer wall 21B, and also has a plurality of pressing projections 21Q on the lower surface of the vertical groove 23A of the attachment / detachment mounting portion 23. Further, as shown in FIG. 5, the upper case 21 presses the upper surface of the peripheral portion of the through hole 4 </ b> H provided in the center portion of the circuit board 4 by the pressing rib 21 </ b> R provided around the connection boss 21 </ b> H. Therefore, the upper case 21 is formed by integrally molding the pressing convex portions 21P and 21Q and the pressing rib 21R so that the lower end surfaces thereof are on the same plane. As shown in FIG. 5, the circuit board 4 is connected to the lower case 22 and the upper case 21, the lower surface is supported by the support portion 22 </ b> P and the insertion boss 22 </ b> H, and the upper surface is the pressing convex portions 21 </ b> P and 21 </ b> Q. It is pressed by the pressing rib 21R and fixed in place. However, the circuit board can be fixed to the lower case or the upper case via a coupling tool such as a set screw or with a locking structure.

  Further, the circuit board 4 has a charging terminal 10 </ b> B and an elastic contact 14 that is elastically pressed and brought into contact with the rotating terminal 11 at both ends thereof. The charging terminal 10B and the elastic contact 14 are metal plates that are elastically deformed. The charging terminal 10 </ b> B is U-curved at the tip and is bent into a mountain shape to provide an elastic contact portion. The charging terminal 10 </ b> B is disposed in a terminal window 21 </ b> V opened at one end of the vertical groove 23 </ b> A of the upper case 21, and has an elastic contact portion protruding toward the battery mounting portion 23. The charging terminal 10B is electrically connected to the electrode of the battery 1 by elastically pressing the elastic contact portion against the electrode of the battery 1.

  As shown in FIGS. 7 to 10, the elastic contact 14 has a U-shaped metal plate, one end fixed to the circuit board 4, and the other end in contact with the lower end of the rotary terminal 11. Therefore, the elastic contact 14 is positioned below the rotary terminal 11 and fixed to the circuit board 4. Precisely, the elastic contact 14 is arranged so that the contact terminal 13 of the rotary terminal 11 exposed from the contact window 21T opened in the upper case 21 can be elastically pressed at the U-curved tip. . As shown in FIGS. 9 and 10, the elastic contact 14 has a distal end portion on the curved portion 13 </ b> A of the contact terminal 13 disposed on the rear end surface of the rotating body 12 in a state where the rotary terminal 11 is in a vertical posture or a horizontal posture. And the contact terminal 13 is electrically connected to the elastic contact 14 in a low resistance state.

  Further, the circuit board 4 is connected to the receiving surface of the circuit board 4 facing the bottom plate 22 </ b> A via the cushion material 7, so that the heat blocking gap between the circuit board 4 and the receiving coil 5 is blocked. 26 is provided. The cushion material 7 is an insulating material that is elastically deformed, and is preferably a plastic foam. The cushion material 7 is a rectangular parallelepiped having a predetermined thickness, and is bonded to the power receiving coil 5 and fixed to the circuit board 4. The rectangular parallelepiped cushioning material 7 adjusts the heat blocking gap 26 between the circuit board 4 and the power receiving coil 5 by its thickness. The cushion material 7 has a thickness of about 3 mm, the power receiving coil 5 is separated from the circuit board 4 by about 3 mm, and a heat blocking gap 26 of about 3 mm is provided. However, the cushion material 7 elastically presses and closely contacts the power receiving coil 5 against the bottom plate 22A of the lower case 22, so that the cushion material 7 is thinner than the uncompressed state in the state of being housed in the casing 2, thereby 26 is slightly narrower than the uncompressed thickness of the cushion material 7.

  The cushion material 7 has the upper surface bonded to the lower surface of the circuit board 4 and the lower surface bonded to the power receiving coil 5 via the shield plate 6 to fix the power receiving coil 5 to the circuit board 4. The power receiving coil 5 having the shield plate 6 laminated on the upper surface is fixed to the circuit board 4 by adhering a cushion material 7 to the shield plate 6. A receiving coil 5 of a planar coil having a circular outer shape is fixed to the circuit board 4 with a cushion material 7 at a plurality of points. The power receiving coil 5 shown in FIGS. 7 and 8 has a cushion material 7 bonded at three locations and fixed to the circuit board 4 with the cushion material 7. However, the cushion material can be arranged at one or two places between the power receiving coil and the circuit board, or can be arranged at four or more places.

  In the carrying case described above, the power receiving coil 5 is fixed to the lower surface of the lower case 22 while the power receiving coil 5 is fixed to the lower surface of the circuit board 4 with the cushion material 7 interposed therebetween. 5 is pressed toward the bottom plate 22 </ b> A, and the heat receiving gap 5 can be formed between the circuit board 4 and the power receiving coil 5 while the power receiving coil 5 is disposed in close contact with the bottom plate 22 </ b> A. This structure is integrated by fixing the power receiving coil 5 and the shield plate 6 to the circuit board 4, and the circuit board 4 in which the power receiving coil 5 and the shield plate 6 are integrated is disposed in the lower case 22. Since the power receiving coil 5 and the shield plate 6 can be efficiently arranged at fixed positions in the casing 2, it is possible to realize a feature that the assembly is good, the productivity is improved, and the mass production is inexpensive.

  However, in the carrying case, it is not always necessary to provide a cushion material between the circuit board and the power receiving coil. The circuit board can also be bonded and fixed to the inner surface of the bottom plate without using a cushion material. In this carrying case, the power receiving coil is fixed in close contact with the bottom plate with an adhesive or double-sided tape, and in this state, a predetermined space is provided between the circuit board and the bottom plate as described above. Therefore, a heat blocking gap can be formed between the power receiving coil and the circuit board. Further, the carrying case can insert the power receiving coil into the bottom plate. In this carrying case, the power receiving coil built in the casing can be most effectively brought close to the power transmitting coil of the charging base in a state where it is set on the charging base.

  In the battery carrying case 100 having the above charging function, as shown in FIG. 6, the opening / closing lid 20 is opened, the standard battery is set in the attachment / detachment mounting portion 23, and the opening / closing lid 20 is closed as shown in FIG. Carry in state. Further, when charging the battery 1, as shown in FIG. 14, the battery 1 is placed on the charging stand 90 in a state in which the battery 1 is stored. The carrying case 100 mounted on the charging stand 90 induces electric power to the power receiving coil 5 that is electromagnetically coupled to the power transmitting coil 95, and converts the induced electric power into direct current that charges the battery 1 by the charging circuit 30. To charge. When the battery 1 is fully charged, the charging circuit 30 cuts off the charging current of the battery 1. When the charging current is interrupted, the current of the power receiving coil 5 is interrupted and the load of the power transmission coil 95 changes. Therefore, the charging stand 90 detects the full charge of the battery 1 due to the load fluctuation of the power transmission coil 95 and transmits power. The supply of AC power to the coil 95 is stopped. The carrying case can also detect the full charge of the battery, wirelessly transmit the detected full charge signal to the charging stand, and stop the charging of the charging stand. The carrying case includes a transmitter that transmits a full charge signal, and the charging stand includes a receiver that receives a full charge signal transmitted from the transmitter.

DESCRIPTION OF SYMBOLS 100 ... Carrying case 1 ... Battery 1A ... AA battery 1B ... AAA battery 2 ... Casing 3 ... Charging function 4 ... Circuit board 4H ... Through-hole 4M ... Positioning notch part 4N ... Positioning recessed part 5 ... Power receiving coil 6 ... Shield plate 7 DESCRIPTION OF SYMBOLS Cushion material 10 ... Charging terminal 10A ... Charging terminal 10B ... Charging terminal 11 ... Rotating terminal 12 ... Rotating body 12X ... Rotating shaft 12Y ... Locking convex part 13 ... Contact terminal 13A ... Curved part 14 ... Elastic contact point 18 ... Heating component 19 ... Set screw 20 ... Opening / closing lid 20A ... Top plate 20B ... Side wall 20C ... End wall 20D ... Extension 20E ... Rotating shaft 20F ... Notch 21 ... Upper case 21B ... Outer wall 21D ... Recess 21E ... Bearing recess 21F ... Step 21G ... Locking part 21H ... Connecting boss 21P ... Pressing convex part 21Q ... Pressing convex part 21R ... Pressing rib 21S ... Set concave part 21 T ... Contact window 21U ... Elastic arm 21V ... Terminal window 21X ... Shaft hole 21Y ... Locking hook 22 ... Lower case 22A ... Bottom plate 22B ... Peripheral wall 22G ... Locking hook 22H ... Insertion boss 22J ... Insertion recess 22K ... Circular recess 22L ... Circular protrusion 22M ... Positioning convex part 22N ... Positioning rib 22P ... Supporting part 23 ... Detachment / mounting part 23A ... Vertical groove 24 ... Ventilation gap 25 ... Storage space 26 ... Heat blocking gap 30 ... Charging circuit 31 ... Rectification circuit 32 ... Smooth Capacitor 33 ... Constant current circuit 34 ... Switching circuit 35 ... Detection contact 36 ... Detection terminal 90 ... Charging stand 92 ... Outer case 93 ... AC power supply 95 ... Power transmission coil 96 ... Mounting plate 97 ... Figure 99 ... AC adapter 200 ... Charger 201 ... Built-in battery 202 ... Case 203 ... Charging circuit 204 ... Output circuit 205 ... Receiving coil 20 6 ... DC / DC converter

Claims (7)

A charging stand (90) having a detachable mounting part (23) in which a battery (1) to be charged can be set detachably and having a built-in power transmission coil (95) to carry and charge power by electromagnetic induction Mounted with a casing (2) having a flat bottom plate (22A) to be mounted on the battery and a charging circuit (30) for charging the battery (1) set in the detachable mounting portion (23) of the casing (2) Connected to the circuit board (4) and the charging circuit (30) of the circuit board (4) and electromagnetically coupled to the power transmission coil (95) of the charging base (90) to receive power from the power transmission coil (95) A power receiving coil (5),
In a state of being placed on the charging stand (90), the power receiving coil (5) is electromagnetically coupled to the power transmitting coil (95), and the power received by the power receiving coil (5) is received by the power receiving coil (5). A battery carrying case having a charging function in which the charging circuit (30) charges the battery (1) with electric power induced by the battery. The casing (2) arranges the circuit board (4) between the detachable mounting part (23) and the bottom plate (22A), and the circuit board (4) and the bottom plate (22A) The power receiving coil (5) is disposed close to the bottom plate (22A),
2. The heat blocking gap (26) is provided between the power receiving coil (5) and the circuit board (4), so that a heat blocking gap (26) is provided between the power receiving coil (5) and the circuit board (4). A battery carrying case having the charging function described.   A cushion material (7) is disposed between the power receiving coil (5) and the circuit board (4), and with the cushion material (7), the power receiving coil (5) is the bottom plate (22A). A carrying case for a battery having a charging function according to claim 2, wherein the carrying case is elastically pressed toward the bottom and is brought into close contact with the bottom plate (22A).   The battery carrying case having a charging function according to claim 2 or 3, wherein the circuit board (4) fixes a heat generating component (18) on the opposite side of the surface facing the power receiving coil (5).   The casing (2) has an opening / closing lid (20) for opening and closing the attachment / detachment attachment portion (23), and a ventilation gap (24) is provided for ventilating the attachment / detachment attachment portion (23) with the opening / closing lid (20) closed. A battery carrying case having a charging function according to claim 1.   The battery (1) set in the detachable mounting part (23) is an AA battery (1A) and an AAA battery (1B). The battery having a charging function according to any one of claims 1 to 5. carrying case.   The carrying case for a battery having a charging function according to any one of claims 1 to 6, wherein the carrying case is a nickel metal hydride battery set in the detachable mounting portion (23).

Images