JP2842811B2 - Terminal connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal connection method, and more particularly to a terminal connection method of an electronic device driven by a detachable battery.

[0002]

2. Description of the Related Art Conventionally, this type of terminal connection method is disclosed in, for example, Japanese Patent Laid-Open No. 4-192268.
In order to prevent the occurrence of power chattering, there is an object which aims to shift the timing at which the two terminals of the yin and yang separate from the battery. FIG. 4 is a sectional view showing an example of a conventional terminal connection method. Since the free lengths of the two terminals 11 and 12 are different, when the battery 13 is moved in the direction of the arrow from the state in which the battery 13 is inserted, one of the terminals 11 separates from the battery 13 first, and then the other terminal 12 Can be separated from each other such that the battery is separated from the battery 13.

[0003]

In this conventional terminal connection method, there is almost no problem when one terminal is connected to each of a pair of electrodes of the battery, but one or more terminals (cathode and anode) are connected. In any case, it is often difficult to secure a contact point with the battery. Also, even if the problem of the contact point with the battery is solved, it is necessary to consider the length and arrangement of the terminals so that the terminals do not short-circuit during the displacement, etc. Often, a relatively large space is required. This is not suitable for recent demands for downsizing and thinning of electronic devices.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a terminal connection system according to the present invention is provided in such a manner that two leaf spring terminals are arranged side by side in the same displacement direction so that the terminals can be easily installed in a relatively narrow space. In order to increase the number and to make the connection sequence of the terminals stable and constant, and to ensure a sufficient spring pressure when connected to the battery, the leaf spring terminals are configured to function as springs by two bending fulcrums. .

As a specific means for realizing this, the present invention provides two terminals which can be in contact with each other and the two terminals.
In a connection method of a terminal comprising a battery to be connected to a battery and a battery case to which the battery is attached and which can be inserted into a case, the two terminals are leaf spring terminals, and these two leaf spring terminals are provided in the case. The leaf spring terminal of one of the two has a plurality of fulcrums, and has a shape capable of changing the fulcrum of bending,
The said case made by installing a plane tangent to one of said fulcrum of said one plate spring terminal, inserted come the other leaf spring terminals of said two deflected in contact with the battery case the in contact with the one plate spring terminal flexing it, in which the fulcrum of one of said leaf spring terminal deflection and to further deflect transferred to one of the fulcrum in contact with said plane in accordance with the deflection progresses.

[0006]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a plan view sequentially showing the operation of this embodiment.

[0008] The two provided adjacent to each other in the case 3
The leaf spring terminals 1 and 2 have the same polarity, and the battery case 5
When the coin-shaped battery 6 fitted into the case 3 is inserted into the battery accommodating portion 32 of the case 3, it is soldered side by side on the printed circuit board 4 so as to bend in the same direction in contact with the battery. One leaf spring terminal 1 is located closer to the battery case 5 to be inserted and directly contacts the battery case 5, and the other leaf spring terminal 2 has two fulcrums 21 and 22 for bending. Of these, the fulcrum 22 at the center is case 3
Can be in contact with the flat surface part 31 of the first embodiment. These are incorporated in case 3 as shown in FIG. Here, in this embodiment, the same-polarity terminals are installed as the leaf spring terminals 1 and 2 (not shown, but it is assumed that there is another different-polarity terminal). It is for providing. The reason will be described below.

FIG. 3 is a circuit diagram showing an example of a general battery detection circuit. In FIG. 3, when the transistor 7 is turned on (ON), it is connected to a circuit that determines that the battery is physically present in the circuit. In this circuit, a voltage for turning on the transistor 7 is 0.7 volt (V).
Assume that it is necessary. In such a circuit, when a battery having a large internal resistance such as an air battery is used, the voltage of the battery may drop instantaneously when a device consuming a large current such as a motor is operated. is there. In the circuit of FIG. 3, when the voltage of the transistor 7 instantaneously falls below 0.7 volts,
Is turned off (OFF), and it is determined that the battery does not exist although the battery physically exists in the circuit. As such a problem does not occur, in order to provide separate battery detection circuit as unaffected by what magnitude detection circuit such as a motor current consumption is of so that the need to install two terminals occurs.

Next, the operation of the embodiment of the present invention will be described. FIGS. 2A to 2D are plan views sequentially showing insertion and connection states of a battery case and a leaf spring terminal in this embodiment.

When the battery case 5 in which the coin-shaped battery 6 is fitted is inserted into the battery housing 32 of the case 3 (FIG. 2).
(A)) First, the leaf spring terminal 1 is bent and connected to the terminal portion 51 of the battery case 5. The leaf spring terminal 1 is further bent in accordance with the insertion, and is connected to the leaf spring terminal 2 on the way (FIG.
(B)). In this way, the order in which the two leaf spring terminals 1 and 2 are present is kept constant.

In this embodiment, the leaf spring terminal 1 is a cathode terminal of the main circuit, and the leaf spring terminal 2 is a cathode terminal of the battery detection circuit. When the battery (case) is housed as shown in FIG. 2, the leaf spring terminal 1, which is the cathode terminal of the main circuit, is first connected to the battery, then the anode terminal is connected (not shown here), and finally It is set so that the leaf spring terminal 2 which is the cathode terminal of the battery detection circuit is connected. Otherwise, the relative relationship of the circuits cannot be maintained and a malfunction occurs.

[0013] Next, in this state, but he is flexing of the leaf spring terminal 1 starts bending also advances the one and follow plate spring terminal 2, the amount of displacement of the leaf spring terminal 2 is smaller than the plate spring terminal 1, leaf spring terminal When 2 is bent around the fulcrum 21 on the base side, it is often impossible to secure a sufficient terminal pressure for electrical connection. Therefore, during the bending, the fulcrum 22 at the center of the leaf spring terminal 2 is brought into contact with the flat portion 31 of the case 3 (FIG. 2).
(C)) From there, the leaf spring terminal 2 starts to bend around the fulcrum 22 so that the battery case 5 is completely inserted into the case 3 and fixed (FIG. 2D). As described above, the flat portion 31 that comes into contact with the leaf spring terminal 2 in the middle of bending is used.
By providing the fixed portion as described above and changing the fulcrum of the bending of the leaf spring terminal 2 and bending it like a terminal having a different shape, a sufficient terminal pressure can be secured with a small amount of bending.

The present invention is not limited to the above-described embodiment, and the shapes of the components can be variously changed, and other configurations can be variously changed without departing from the gist of the present invention. You can change it.

[0015]

As described above, according to the terminal connection method of the present invention, the leaf spring terminals are connected side by side in the same displacement direction, and at this time, the displacement amount of one leaf spring terminal is small. By making the terminal shape that can have multiple bending fulcrums, it is possible to easily increase the number of terminals in a small space and keep the terminals constant, so that the spring pressure does not become insufficient and the spring pressure cannot be sufficiently obtained. In this order, and a sufficient spring pressure can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIGS. 2A to 2D are plan views sequentially showing insertion and connection states of a battery case and a leaf spring terminal according to the embodiment of the present invention.

FIG. 3 is a circuit diagram showing a general battery detection circuit.

FIG. 4 is a sectional view showing an example of a conventional terminal connection method.

[Explanation of symbols]

 1, 2 leaf spring terminal 21, 22 fulcrum 3 case 31 plane portion 32 battery accommodating portion 4 printed circuit board 5 battery case 51 terminal portion 6, 13 battery 7 transistor 11, 12 terminal

Claims (1)

(57) [Claims] 1. A two terminals that can contact with each other, one the 2
A battery to be connected to any pin of the connection method of the terminal consisting of a insertable battery case to case by attaching the battery, the two terminals and the leaf spring terminal, said two leaf spring terminal The leaf spring terminals are arranged adjacent to each other and arranged in the same displacement direction in the case, and one of the two leaf spring terminals has a plurality of fulcrums so as to be able to change the fulcrum of bending . will set up a plane tangent to one of said fulcrum plate spring terminal, inserted come other <br/> plate spring terminals said one plate of said the two deflected in contact with the battery case in contact with the spring terminals flexed this, deflection of the terminal, characterized in that the fulcrum of one of said plate spring pin deflection and to further deflect transferred to one of the fulcrum in contact with said plane in accordance with the process proceeds Connection method.