JPH0428188Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a charger that is generally widely used and has a charge display blocker that enables charging even small batteries to be charged.

(b) Prior Art Among commonly used chargers, a charger capable of charging single, AA, and AA batteries will be described below with reference to the drawings. 1st
FIG. 2 is a partially cutaway front view of the charger, and FIG. 2 is a partial sectional view showing the battery placement state at - in FIG. 1. FIG. 3 is a circuit diagram of the charger.
In these figures, 1 is the main body case of the charger, a transformer 2 is built in the main body 1, diodes 3, 3 are connected to both ends of the secondary winding, and the transformer intermediate tap 4 is common. It is considered to be the positive terminal of The storage section 5 for the batteries to be charged formed in the main body case 1 is adjusted to the length of two single-type rechargeable batteries connected together, and can accommodate each of the single-type, AA-type, and AA-type rechargeable batteries. 6, 7, and 8 are formed in a shape to securely store and place them as shown in FIG.
A movable positive electrode terminal member 11 having a rivet 9, a resistor R1, and a movable positive electrode terminal 10 is formed on the positive electrode side,
When the single type battery to be charged 6 is stored, the movable positive electrode terminal member 11 rotates to a horizontal position so as to flow into the storage area for the AA type battery to be charged 8 in the storage part 5, and the movable positive electrode terminal member 11 is rotated to a horizontal position so as to flow into the storage area for the AA type battery to be charged 8 in the storage part 5. When the batteries 7 and 8 are stored, the movable positive electrode terminal member 11 is rotated to a vertical position so that the length of the storage section 5 is adjusted to the length of each battery to be charged.

In the case of a single battery to be charged 6, the charging current flows from the transformer intermediate tap 4 to the positive power supply contact 12, the single battery to be charged 6, the negative power supply contact 13, and the resistor R2.
The order is diode 3, and it is used as a charging display element.
The current shunted from the negative power supply contact piece 13 flows into the LED 14 through resistors R3 and R4.
lights up and flows to diode 3.

In the case of AA type rechargeable battery 7, connect the transformer intermediate tap 4 to the positive power supply contact piece 12, the rivet 9, and the resistor R.
1. A charging current flows through the movable positive terminal 10, the AA battery to be charged 7, the negative power supply contact piece 13, the resistor R2, and the diode 3 in this order, and the LED 14 receives the same charge as in the case of charging a single battery to be charged. flows.

In the case of charging an AA battery to be charged 8, from the transformer intermediate tap 4 to the positive electrode power supply contact piece 12, the rivet 9, the resistor R1, the movable positive terminal 10, the AA battery to be charged 8, and the negative terminal for AA batteries. 15, resistance R5,
A charging current flows in the order of R3, R2, and diode 3, and the current shunted from resistor R5 flows into LED 14 through resistor R4, turns on LED 14, and flows to diode 3.

As described above, each battery to be charged is charged with a charging current that decreases in the order of single type, AA type, and AA type batteries. However, it is difficult to use the charger as it is to charge a small battery to be charged, which has a small shape and a small charging current.

C. Purpose This invention was devised in view of the above points,
A charger having a charging circuit including a charging display element,
To charge a battery to be charged with a charging current smaller than that of the charger, to charge a battery to be charged smaller than a battery to be charged stored in the charger, and to light up a charging display element during charging.

D. Structure The present invention provides a charger having a charging display element circuit including a charging display element, and having a storage section for storing a battery to be charged, which includes a recess for housing a battery to be charged that is smaller than the battery to be charged. and a charger spacer having a casing large enough to be attached to the housing, power receiving terminals on both end faces of the casing, and a charger spacer on the opposing inner surface of the recess with the small battery to be charged. a backflow blocking diode and a first resistor in series with the connecting terminal, and a second resistor in parallel with the backflow blocking diode, the first resistor, and the connecting terminal are installed in the housing. The present invention is characterized in that the charging display element is turned on when the small battery to be charged is being charged, and the charging current is controlled.

E. Embodiment A charger for charging AAA batteries, which is an embodiment of the present invention. A charger that can charge single, AA, AA, and AAA batteries with a spacer. will be explained using drawings. FIG. 4 is a sectional view of the charger spacer, FIG. 5 is a perspective view of the charger spacer, and FIG. 6 is a circuit diagram when the charger spacer is attached to the charger. Since the charger main body is the same as that described above in the prior art, the description will be omitted and the symbols will be used in common.

In these figures, 16 is a housing that has a shape that can be stored in a charger and is long enough to connect two AA batteries to be charged. The housing 1 is provided with a recess 17 that can accommodate two bottles.
The upper center of the side wall 6 is cut out in a semicircular shape to facilitate the insertion and removal of batteries. Further, anode and cathode power receiving terminals 18 and 19 are provided on both end surfaces of the housing 16.
However, on the opposing inner surface of the recess 17, an anode connection terminal 20 and an elastic cathode connection terminal 19, which are connected to an AAA battery to be charged, are provided, respectively. It is formed as an integral terminal. and the cathode terminal 19
One end is connected to the anode power receiving terminal 1 through a slit 21 provided at the bottom of the cathode side end surface of the housing 16.
8 and anode connection terminal 20 are respectively inserted into the housing 16 through slits 22 and 23 provided between them, and inside the housing 16, the cathode terminal 19 and the anode power receiving terminal 18 are connected to each other with resistance. R7, and a diode 24 and a resistor R6 are connected between the anode power receiving terminal 18 and the anode connection terminal 20.
are connected by connecting them in series.

What is the charging current when the above charger spacer is attached to the charger? The flow flows from the transformer intermediate tap 4 to the positive electrode power supply contact piece 12, the rivet 9, the resistor R1, the movable positive electrode terminal 10, and the anode power receiving terminal 18, where it is shunted and flows to the diode 24, resistor 6, and AAA battery 25 on one side, and on the other side. is resistor R7 and flow cathode terminal 19
We'll meet up at The combined current flows through the charger's negative terminal 15 for AA batteries, resistor R5, and is divided again, one side flows through resistors R5 and R2, and the other flows through resistor R4LED1.
4 and the current turns on the LED 14, joins and flows to the diode 3. Here, diode 24 prevents discharge of the battery, and resistor R6 is for charging current control. In a circuit that does not use the resistor 7, the charging current controlled by the resistor R6 is lower than that when charging an AA battery, so the LED 14 does not light up. Therefore, in order to light up LED14, resistor R7 is connected in parallel to reduce the impedance of the circuit inside the charger spacer, and the charging current is the same as above.
The current flowing through the LED 14 is increased and the LED 14 is turned on. In addition, when no AAA battery is inserted, current flows to the LED 14 through the resistor 7, but since the resistor R6 is not connected, the impedance of the circuit inside the charger spacer is large and the LED
14 does not light up.

F. Effect With the present invention, it is possible to charge a small battery with a small charging current using a charger that has a charging display element, which is commonly used, by using a charger spacer, and the charging display element lights up during charging. effective.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of the charger, Figure 2
The figure is a partial sectional view at - in Figure 1, Figure 3 is a circuit diagram of the charger, Figure 4 is a sectional view of the charger spacer, Figure 5 is a perspective view of the charger spacer, and Figure 6 is the charger. It is a circuit diagram when a charger spacer is attached to. 5... Storage portion, 1... Main body case, 17... Recess, 15... Housing, 18, 19... Power receiving terminal, 2
0, 19... Connection terminal, 24... Reverse current blocking diode, R6... First resistor, R7... Second resistor, 1
4... Charge display element (LED).

Claims (1)

[Scope of utility model registration request] A charger having a charging circuit including a charging display element and a storage section for storing a battery to be charged, the charger having a recess for storing an auxiliary rechargeable battery smaller than the battery to be charged, and a recess in the storage section for storing an auxiliary rechargeable battery smaller than the battery to be charged. A charger spacer having a casing of a size to be mounted is provided, power receiving terminals are provided on both end surfaces of the casing, and connection terminals connected to the small battery to be charged are provided on the opposing inner surface of the recess. A reverse current blocking diode, a first resistor, and a series circuit are connected between the connecting terminal and the power receiving terminal, and a second resistor is connected between both power receiving terminals, and when charging the small battery to be charged, A charger configured to cause the charging display element to light up.