JPH0644953A - Electronic equipment using coin type battey - Google Patents

Abstract

PURPOSE:To reduce a voltage drop across a connection between the positive and negative electrodes of a coin type battery and each corresponding battery connection member of an electronic equipment body by undertaking the connection via contact connection at one position, reduce the quantity of parts for battery connection, make easy the manufacture of a battery holder, and further prevent a battery from being erroneously housed with positive and negative electrodes reversely positioned. CONSTITUTION:A battery housing section 13 within an equipment body 10 is provided with a battery connection spring 14a for contact with a negative electrode (a) on the bottom of a coin type battery A, and another battery connection spring 14b for contact with a positive electrode (b) on the battery A. The battery housing section 21 of a battery holder 20 is formed through the upper and lower sides thereof, and the internal periphery of the holder 20 is provided with a bulge section 21a at the lower end thereof for supporting the lower end of the periphery of the battery A from below. The battery A is housed, while the negative electrode (a) on the bottom being kept sliding into the bulge section 21a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device using a coin battery.

[0002]

2. Description of the Related Art Some electronic devices such as small radio receivers and small electronic calculators generally called calculators use coin type batteries (also called button type batteries) as power source batteries.

As this kind of electronic equipment, generally, there is known one in which a battery housing portion having an opening on the back surface of the equipment body is provided in the equipment body, and a detachable battery lid is provided at the opening portion. .

However, in such an electronic device having a battery housing structure, since the battery lid is removed and the coin-shaped battery is housed in the battery housing portion, it is troublesome to attach and detach the battery lid, and the battery can be easily replaced. It has the drawback that it does not exist.

For this reason, conventionally, a coin-shaped battery is housed in a battery holder, and the battery holder is inserted into the device body from the side of the device body so as to be housed in a battery housing portion in the device body. Equipment is being considered.

FIG. 4 shows a battery storage structure of a conventional electronic device in which a coin-shaped battery is stored using a battery holder. In FIG. 4, reference numeral 1 denotes a device body composed of an upper case 1a and a lower case 1b. Inside the device body 1, a battery storage portion 2 that opens to a side surface of the device body 1 is provided.
Is provided.

Reference numeral 3 denotes a battery holder which is removably inserted into the battery housing 2 inside the device body 1 through the opening 2a on the side surface of the body. This battery holder 3 is made of a synthetic resin plate,
The battery holder 3 is provided with a flat C-shaped battery accommodating portion 4 that penetrates the upper and lower surfaces of the battery holder 3 and opens to the front end side (the insertion end side into the device body 1), and the rear end of the battery holder 3. The knob portion 5 having the hooking groove 6 is integrally formed therewith.

The knob portion 5 is inserted into the opening 2a on the side surface of the main body 1 to close the opening when the battery holder 3 is completely inserted into the main body 1. The holder 3 is pulled out by hooking the hook in the hook groove 6 of the knob 5 and pulling the battery holder 3.

Further, the tip ends of the side walls 4a, 4a on both sides of the battery accommodating portion 4 which are separated from each other on the tip end side of the holder are
It is designed to be elastically deformed inside the battery housing part 4,
Outside the tips of the side walls 4a, 4a, hooks 4b,
4b is formed. The latching claws 4b, 4b are provided in the battery housing portion 2 when the battery holder 3 is inserted into the device body 1.
The battery holder 3 is engaged with the hook portions 7, 7 formed in the inner part of the battery holder 3.
The latching claws 4b and 4b lock the side walls 4a and 4a inward when the battery holder 3 is strongly pulled when the battery holder 3 is pulled out. It is supposed to leave.

Reference numeral 8 denotes a battery connecting plate made of a conductive metal plate attached to the battery holder 3 as a bottom plate of the battery housing portion 4. The battery connecting plate 8 is inserted when the battery holder 3 is formed, and the battery connecting plate 8 is a coin-shaped battery housed in the battery housing portion 4 with the negative electrode side (one surface side of the battery) facing down. A pair of battery contact springs 8a, 8a that come into contact with the negative electrode of the battery A are formed by cutting and raising, and one side edge of the battery connecting plate 8 has a connection terminal that rises along the outer surface of the battery holder 3. A section 8b is provided.

On the other hand, when the battery holder 3 is inserted into the battery accommodating portion 2 of the device main body 1, it is elastically contacted with the connecting terminal portion 8b of the battery connecting plate 8 and the negative electrode of the battery A via the battery connecting plate 8. A first battery connecting spring 9a to be connected and a second battery connecting spring 9b which is inserted into the open portion at the tip of the holder and elastically contacts the positive electrode (the other surface and the outer peripheral surface) of the coin-shaped battery A on the side surface of the battery are provided. ing.

The battery connection springs 9a and 9b are connected to a circuit board (not shown) in the device body 1 and are housed in the battery holder 3 and together with the battery holder 3 the battery housing 2 in the device body 1. The battery A inserted and housed in is connected to the power supply circuit section of the circuit board via the battery connection springs 9a and 9b.

That is, in the battery housing structure, the battery A is housed in the battery holder 3 and the battery holder 3 is placed in the device body 1.
The battery A is connected to the circuit board in the device main body 1 by inserting the battery A into the device main body 1. According to this battery storage structure, the battery A can be easily replaced and the main body can be replaced. Since the side opening 2a is closed by the knob 5 of the battery holder 3, it is not necessary to provide a battery lid on the opening.

[0014]

However, the conventional electronic equipment adopting the battery storage structure as described above is
The negative electrode of the battery A accommodated in the battery accommodating portion 4 of the battery holder 3 is brought into contact with the metal battery connecting plate 8 which is the bottom plate of the battery accommodating portion 4, and the connection terminal portion 8b formed on the battery connecting plate 8 is formed.
Is brought into contact with the first battery connection spring 9a in the device body 1 to connect the negative electrode of the battery A to the first battery connection spring 9a on the device body 1 side by contact connection at two locations. The voltage drop between the negative electrode of the battery A and the first battery connection spring 9a is large.

Further, the battery connection springs 9a.
Since the battery holder 3 is also provided with the battery connecting plate 8 in addition to the battery holder 9b, the number of components for connecting the battery is large, the battery holder 3 is difficult to manufacture, and the cost is high.

Moreover, in the above-mentioned conventional electronic equipment, even if the battery A is accommodated in the battery holder 3 upside down, the battery holder 3 can be inserted into the equipment main body 1, so that the battery A becomes the negative electrode. Device body 1
It was sometimes stored inside.

According to the present invention, the negative electrode and the positive electrode of the coin-shaped battery and the corresponding battery connecting members on the device main body side are connected by contact connection at one place respectively to reduce the voltage drop between them. In addition, the number of parts for connecting the battery is reduced and the battery holder is easily manufactured to reduce the cost, and further, it is possible to prevent the battery from being stored in the device body with the negative electrode and the positive electrode being mistaken. It is an object of the present invention to provide an electronic device using a coin-type battery, which is capable of

[0018]

The present invention has a battery housing portion for housing the coin-shaped battery therein, and an opening corresponding to the battery housing portion is formed on a side surface of the battery housing portion.
A device main body provided with a first battery connecting member in contact with the negative electrode on the lower surface of the coin-shaped battery and a second battery connecting member in contact with the positive electrode of the coin-shaped battery in the battery housing portion,
A coin accommodating portion for accommodating the coin-shaped battery, the coin accommodating portion accommodating the coin-shaped battery and being inserted into the battery accommodating portion through the opening, and having a thickness substantially equal to that of the coin-shaped battery A battery holder, and a battery accommodating portion of the battery holder is formed by penetrating the upper and lower surfaces of the battery holder, and the lower edge of the outer periphery of the coin-shaped battery is attached to the inner periphery of the lower edge of the battery holder from below. The protruding portion for supporting is formed in a protruding shape, and the coin-shaped battery is accommodated by inserting the negative electrode on the lower surface thereof into the inside of the protruding portion.

[0019]

According to the present invention, the battery accommodating portion of the battery holder is formed so as to penetrate through the upper and lower surfaces of the battery holder, and the lower edge of the outer peripheral portion of the coin-shaped battery is provided on the inner periphery of the lower edge portion of the battery accommodating portion. Since the protruding portion that supports from the protruding portion is provided so that the negative electrode on the lower surface of the coin-shaped battery can be accommodated by being inserted inside the protruding portion, the negative electrode on the lower surface of the battery also
It is possible to directly contact the battery connecting member (first battery connecting member) on the device body side.

Therefore, the negative electrode and the positive electrode of the coin-shaped battery and the corresponding battery connecting members on the device main body side can be connected by contact connection at one location to reduce the voltage drop therebetween. In addition, since it is not necessary to provide a member for connecting the negative electrode of the battery to the battery connecting member on the device body side in the battery holder, the number of parts for connecting the battery is reduced and the manufacturing of the battery holder is facilitated. The cost can be reduced.

Further, the battery holder accommodates the coin-shaped battery by inserting the negative electrode on the lower surface of the battery into the inside of the overhanging portion projecting on the inner periphery of the lower edge of the battery accommodating portion. When the battery is stored in the battery holder in reverse, the negative electrode of the battery protrudes from the upper surface of the battery holder, and even if you try to insert the battery holder into the battery storage part in the device body, the negative electrode of the battery is caught on the side surface of the device body and the battery holder Since the insertion of the battery is prevented, it is possible to prevent the battery from being stored in the device body with the negative electrode and the positive electrode being mistaken.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a small radio receiver will be described below with reference to FIGS. In FIGS. 1 and 2, reference numeral 10 denotes a device body of the radio receiver. The device main body 10 is composed of an upper case 10a and a lower case 10b, and inside thereof, a circuit board 11 constituting a radio receiver circuit and an antenna connected to the circuit board 11.
12 and are stored.

Reference numeral 13 denotes a battery housing portion secured in the device body 10, and the battery housing portion 13 is opened at one side surface of the device body 10. Further, a cutout portion 11a into which a battery holder 20 described later is inserted is formed in a portion of the circuit board 11 corresponding to the battery housing portion 13. The circuit board 11 has a pair of battery connection springs 14a, 14b. Is installed.

Of the pair of battery connecting springs 14a and 14b, the first battery connecting spring 14a is housed in the battery holder 20 with the negative electrode a side facing down, and is housed in the battery housing portion 13 in the device body 10. Battery holder for the negative electrode a of the coin-shaped battery A to be inserted
The first battery connection spring 14a is made of a conductive metal plate, and a pair of spring pieces 15 and 15 elastically contacting the negative electrode a of the battery A are provided in the center of the first battery connection spring 14a. Bent pieces 16 and 16 are formed by cutting and raising, and on both side edges of the first battery connection spring 14a, the both side edges of the cutout portion of the circuit board 11 are held from above.

The battery connection spring 14a is supported on the circuit board 11 by sandwiching the both side edges of the cutout portion of the circuit board 11 from above and below by the both side edges and the bent pieces 16, 16. The tip of the board connecting portion 17 extending from the central portion of the battery connection spring 14a is fixed to the circuit board 11 by soldering it to the terminal electrode 18a on the surface of the circuit board 11. Together with 11, it is in contact with the inner surface of the case of the device body 10 and is supported by the inner surface of the case.

The second battery connection spring 14b is inserted from the side surface of the battery holder 20 into the positive electrode b of the coin-shaped battery A housed in the battery holder 20 and inserted into the battery housing portion 13 in the device body 10. This second battery connection spring 14b is
The base portion is fixed to the circuit board 11 by soldering to the terminal electrodes 18b on the surface of the circuit board 11.

Next, the battery holder 20 will be described.
The battery holder 20 is an integrally molded product made of synthetic resin. As shown in FIGS. 1 and 3, the battery holder 20 is made of a synthetic resin plate having a thickness almost equal to that of the coin-shaped battery A. A battery accommodating portion 21 penetrating therethrough is formed.

The battery accommodating portion 21 has a circular opening whose peripheral wall is continuous over the entire circumference. The inner edge of the lower edge portion of the battery accommodating portion 21 is the lower edge of the outer peripheral portion of the coin-shaped battery A (protruding on the lower surface of the battery). A ring-shaped projecting portion 21a is provided so as to support a stepped portion around the negative electrode a) from below.

The thickness of the overhanging portion 21a is substantially the same as the protruding height of the negative electrode a of the coin-shaped battery A, and the battery A fitted and accommodated in the battery accommodating portion 21 has the negative electrode a overhanging portion. The battery is inserted into the inside of 21a, and is housed so that the battery upper and lower surfaces are substantially flush with the upper and lower surfaces of the battery holder 20. The battery accommodating portion 21 is formed to have a diameter slightly larger than the battery diameter in consideration of the variation in the diameter of the battery A.

On one side of the battery holder 20, there is formed a recess 22 in which the upper surface of a part of the peripheral wall of the battery accommodating portion 21 is recessed in the height direction. Battery connection spring
14b enters from the recess 22 and contacts the side surface of the battery A. The recess 22 is formed from the side surface of the battery holder 20 to the tip surface thereof, and the second battery connection spring 14b is formed.
When the battery holder 20 is inserted into the device main body 10, the battery enters the recess 22 of the battery holder 20 without touching the battery holder 20 and comes into contact with the side surface of the battery.

On the lower surface of the battery holder 20 on the tip side,
From the tip to the battery accommodating portion 21, a recessed groove 23, which is a relief for the spring pieces 15, 15 of the first battery connecting spring 14a,
23 is formed and the spring piece of the first battery connection spring 14a.
Reference numerals 15 and 15 denote the recessed grooves 2 with the insertion of the battery holder 20.
It passes through the insides of 3, 23 and enters below the battery holder 20 without hitting it, and comes into contact with the lower surface of the battery (negative electrode a).

Further, on both sides of the tip of the battery holder 20,
A pair of elastically deformable hooking pieces 24, 24 projecting forward from the lower edge portion are integrally provided so as to project.
On the outer side of the tip of the device, there are latching claws 24a, 24a for locking the battery holder 20 by engaging a pair of battery holder latching parts 19, 19 formed in the inner part of the battery housing 13 in the device body 10. Has been formed.

When the battery holder 20 is inserted into the device body 10, the retaining pieces 24, 24 are pushed by the retaining portions 19, 19 and are elastically deformed inward while overcoming the retaining portions 19, 19. When the battery holder 20 is strongly pulled when the battery holder 20 is pulled out, the lever holders 19 and 19 are elastically deformed inward to be detached from the hook portions 19 and 19. As shown in FIG. 2, the battery holder engaging portions 19, 19 on the side are integrally provided on the inner surface of the case of the device body 10 so as to project.

At the rear end of the battery holder 20, when the battery holder 20 is completely inserted into the device body 10,
A knob portion 25 that fits into the opening 13a on the side surface of the device and closes the opening 13a is integrally formed.The knob portion 25 has a hooking portion for pulling out the battery holder 20 from the inside of the device body 10. 26 are provided.

In the above-described embodiment, the battery accommodating portion 21 of the battery holder 20 is formed so as to penetrate the upper and lower surfaces of the battery holder 20, and the outer peripheral portion of the coin-shaped battery A is provided on the inner periphery of the lower edge portion of the battery accommodating portion 21. Overhanging portion 21a supporting the lower edge from below
Since the coin-shaped battery A is housed by projecting the negative electrode a on the lower surface of the coin-shaped battery A into the inside of the protruding portion 21a, the negative electrode a on the lower surface of the battery A is connected to the battery holder 20.
Exposed on the lower surface of the first battery connection spring 14 on the device body 10 side
The positive electrode of the battery A (the outer peripheral surface and the upper surface of the battery A) is in direct contact with a and the second battery connecting spring on the device body 10 side on the battery outer peripheral surface exposed in the recess 22 of the battery holder 20.
Direct contact with 14b.

Therefore, according to the above-described embodiment, the negative electrode a and the positive electrode b of the coin-shaped battery A and the corresponding battery connection springs 14a and 14b on the device main body 10 side are connected at one place respectively by contact connection. Since they can be connected, the voltage drop between them can be reduced.

That is, in the conventional electronic device adopting the battery housing structure shown in FIG. 4, the negative electrode of the battery A is brought into contact with the battery connecting plate 8 which is the bottom plate of the battery holder 3, and the battery connecting plate 8 is attached to the battery connecting plate 8. Since the formed connection terminal portion 8b is brought into contact with the battery connection spring 9a in the device body 1, the negative connection of the battery A and the battery connection spring 9a are electrically connected at two places, and therefore the battery A Although the voltage drop between the negative electrode and the battery connection spring 9a is large, the negative electrode a on the lower surface of the battery can be brought into direct contact with the battery connection spring 14a on the device body 10 side according to the above-described embodiment. The voltage drop between the negative electrode a of the battery A and the battery connection spring 14a can also be reduced.

Further, in the conventional electronic equipment shown in FIG. 4,
Battery connection spring 9a in the device body 1. In addition to 9b, the battery holder 3 is also provided with the battery connection plate 8, so that the number of parts for connecting the battery is large, and the manufacture of the battery holder 3 is troublesome.
Although the cost is high, according to the above embodiment, the battery holder 20
Since it is not necessary to provide a member for connecting the negative electrode a of the battery A to the battery connection spring 14b on the device body 20 side, the number of parts for battery connection can be reduced and the battery holder 20 can be easily manufactured. The cost can be reduced.

Moreover, the battery holder 20 has a projecting portion formed by projecting the coin-shaped battery A on the inner periphery of the lower edge portion of the battery accommodating portion 21.
Since the negative electrode a on the lower surface of the battery is inserted inside the battery 21a to be housed therein, the battery A is turned upside down.
, The negative electrode a of the battery A projects from the upper surface of the battery holder 20, and the battery holder 20 is inserted into the battery housing portion 13 of the device body 10.
, The negative electrode a of the battery A is caught on the side surface of the device body 10 to prevent the battery holder 20 from being inserted. Therefore, the battery A is inserted into the device body 10 with the negative electrode a and the positive electrode b being mistaken. You can prevent it from being stored.

Further, in the above-described embodiment, since the battery accommodating portion 21 of the battery holder 20 has a structure in which the peripheral wall is continuous over the entire circumference, the peripheral wall of the battery accommodating portion 21 of the battery holder 20 has no cut-off portion, Therefore, as compared with the battery holder 3 having the flat C-shaped battery accommodating portion 4 used in the conventional electronic device shown in FIG. 4, the battery accommodating portion 21 has a higher strength, so that the battery holder 20 is not damaged. Can be prevented.

Further, in the above embodiment, the latch pieces 24, 24 provided on the battery holder 20 and latched by the battery holder latching portions 19, 19 in the device body 10 are used as the battery accommodating portion of the battery holder 20. twenty one
Since it is provided separately, the elastic deformation of the hooking pieces 24, 24 is not restricted by the battery A housed in the battery housing portion 21.

Therefore, regardless of the variation in the diameter of the battery A, the hooking pieces 24, 24 can be elastically deformed to securely and reasonably hook the battery holder 20 to the hooking portions 19, 19 in the device body. Therefore, as in the conventional electronic device shown in FIG. 4, when a battery having a large diameter is accommodated, the amount of elastic deformation of the side walls 4a, 4a of the battery accommodating portion 4 is restricted by the battery A, and the battery holder 3 is It will not be impossible to engage with the hook portions 7, 7, and the side wall portions 4a, 4a will be forced and will not be able to engage.
, 4a will not break.

Although the above embodiment is an example applied to a small radio receiver, the present invention is not limited to a radio receiver and can be widely applied to small electronic devices such as a small electronic calculator. Is.

[0044]

According to the present invention, a first battery connecting spring that contacts the negative electrode on the lower surface of the coin-shaped battery and a second battery connecting spring that contacts the positive electrode of the battery are provided in the battery housing of the device body. The battery holder of the battery holder is formed by penetrating the upper and lower surfaces of the holder, and an overhanging portion that supports the lower edge of the outer peripheral portion of the battery from below is provided on the inner periphery of the lower edge portion of the battery holder to project the coin-shaped battery. Since the negative electrode a on the lower surface is inserted into the inside of the projecting portion to be housed, the positive electrode and the negative electrode of the coin-shaped battery and the corresponding battery connecting members on the device main body side are brought into contact with each other at one place. Connected by connecting to reduce the voltage drop between them, reduce the number of parts for battery connection and facilitate the production of the battery holder, and reduce the cost. Furthermore, the battery was mistaken for the positive electrode and the negative electrode. The device body in the state It is possible to prevent from being housed in.

[Brief description of drawings]

FIG. 1 is a perspective view of a device body, a battery holder, and a coin-shaped battery, showing an embodiment in which the present invention is applied to a small radio receiver.

FIG. 2 is an exploded perspective view of a device body.

FIG. 3 is a plan view of a battery holder.

FIG. 4 is a plan view showing a battery storage structure in a conventional electronic device.

[Explanation of symbols]

 10 ... Device body 13 ... Battery housing 13a ... Openings 14a, 14b ... Battery connection spring 20 ... Battery holder 21 ... Battery housing 21a ... Overhanging part A ... Coin-shaped battery a ... Negative electrode b ... Positive electrode

Claims (1)

[Claims] 1. An electronic device using a coin-shaped battery, having a battery housing portion for housing the coin-shaped battery therein, and forming an opening corresponding to the battery housing portion on a side surface thereof. An apparatus main body provided with a first battery connecting member in contact with a negative electrode on a lower surface of the coin-shaped battery and a second battery connecting member in contact with a positive electrode of the coin-shaped battery in the battery housing; A battery holder having a battery accommodating portion for accommodating the coin-shaped battery, and accommodating the coin-shaped battery in the battery accommodating portion and inserting the coin-shaped battery into the battery accommodating portion through the opening. And a battery accommodating portion of the battery holder that is formed so as to penetrate through the upper and lower surfaces of the battery holder, and supports the lower edge of the outer peripheral portion of the coin-shaped battery from below on the inner periphery of the lower edge portion thereof. Protruding overhang And a shape, the coin cells, are characterized in that they contain by entering a negative electrode of the lower surface to the inside of the overhang, the electronic apparatus using the coin cells.