JPH0480507B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a battery mounting structure in a thin electronic device.

[Technical background of the invention and its problems]

Recently, electronic devices such as portable small radio receivers have become considerably thinner.

Conventionally, as shown in FIG. 4, the mounting structure for a power battery in this type of thin electronic equipment is such that a battery housing part a is provided inside the equipment case A and has an opening on the back side of the equipment case A. As shown in FIG.
There is a case in which a battery storage part a is provided at a corner on the back side of the device case A, and a battery inserted into the battery storage part a is held down by a removable cover c. In addition, in FIG. 4 and FIG. 5, d is a battery contact spring provided in the battery storage part a.

However, in all of the conventional battery mounting structures described above, the battery is inserted into the battery compartment from the back side of the device case, and the battery is inserted into the back cover b or cover c.
Therefore, there was a problem in that the appearance of the electronic device was spoiled by the back cover b or cover c attached to the back of the device.

Therefore, as disclosed in Japanese Utility Model Application Publication No. 57-132372, a coin type battery is attached to the battery fitting part of the battery holder, and then slid and pushed into the battery fitting part of the equipment case, and installed at the bottom of the battery holder. A structure in which the protrusion engages with a corresponding recess formed in the battery housing portion of the device case is being considered. In this way, the battery insertion portion can be made to have approximately the same thickness and diameter as the coin-type battery, and the appearance of the electronic device can be improved.

[Problem to be solved by the invention]

However, since the battery mounting structure disclosed in the above-mentioned prior document is a structure in which the entire coin-type battery is surrounded by a battery holder, the total length of the battery holder becomes long, and the device case also becomes correspondingly large. In addition, since the battery holder has a structure in which a protrusion is formed at the bottom and a corresponding recess is formed in the battery compartment of the device case, both the battery holder and the device case become thicker, which makes the electronic There was a problem that the equipment became quite thick.

Therefore, an object of the present invention is to provide a thin electronic device that can be made smaller and thinner by fitting a coin-type battery into a battery fitting portion of a battery holder and storing it in a battery storage portion of an electronic device. An object of the present invention is to provide a battery mounting structure for use in a battery mounting structure.

[Means to solve the problem]

According to the present invention, a coin-shaped battery fitting portion of a battery holder is formed by a pair of side pieces each having an open tip side, and at least one of the pair of side pieces is elastically deformable toward the battery fitting portion side, and the tip end thereof is made elastically deformable toward the battery fitting portion side. a locking claw is provided in the battery holder, the inner deep part of the battery storage section provided in the chassis is formed in an arc shape, and a locking groove is provided for engaging the locking claw of the battery holder, and the battery fitting part is coin-shaped. The battery holder with the battery fitted therein is pushed through the opening of the battery housing, the side pieces of the holder main body are elastically deformed inward by the arcuate portion of the battery housing, and then restored at the position of the locking groove. Then, the locking pawl is fitted into the locking groove.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings, taking as an example a battery mounting structure in a portable thin radio receiver for FM.

Figures 1 and 2 show the structure of the FM dedicated radio receiver and its battery installation part, and Figure 3 shows the FM radio receiver.
This shows the appearance of a dedicated radio receiver.

First, to explain the case of the FM radio receiver, 1 in Fig. 3 is a receiver case, and this receiver case 1 has a top sheet 2 and a back side on both the top and bottom sides of a flat synthetic resin chassis 1a. It has a structure in which sheets 3 are glued together. The top sheet 2 and the back sheet 3 are bonded to concave surfaces formed on the upper and lower surfaces of the chassis 1a with their outer peripheral surfaces remaining, such that the outer surfaces of the sheets are flush with the front and back surfaces of the outer periphery of the chassis 1a. Moreover, the outer peripheral surface of the chassis 1a is directly used as the outer peripheral surface of the receiver case 1.

The top sheet 2 is made by laminating a reinforcing stainless steel sheet 2b with a thickness of about 0.2 mm on the inner surface of a decorative sheet 2a with a thickness of about 0.1 mm, which is printed on a resin film. agreement
It is adhered to the concave upper surface of the chassis 1a with a 0.3 mm double-sided adhesive film (base film coated with hot melt adhesive on both sides) 4. The back sheet 3 is made by laminating a reinforcing stainless steel sheet 3b with a thickness of about 0.2 mm on the inner surface of a decorative sheet 3a with a thickness of about 0.1 mm, which is printed on a resin film. , is bonded to the concave lower surface of the chassis 1a by a heat-pressing type double-sided adhesive film 5 having a thickness of about 0.03 mm.

Next, to explain the internal structure of the radio receiver, 10 is a wiring board that constitutes an FM radio receiver circuit, and this wiring board 10 has an FM radio receiver IC chip 11 (commercially available product) on its bottom surface. )
and other circuit components (not shown) are attached. Further, 12 is a variable capacitor for tuning. The variable capacitor 12 is connected to the wiring board 10, and the variable capacitor 12 and the wiring board 10 are housed in an opening 6 formed in the center of the chassis 1a.

Further, 13 is a tuning knob, 14 is a volume adjustment knob, and these two knobs 13, 1
4 is rotatably housed in circular knob storage recesses 7 and 8 formed on the upper surface of one end of the chassis 1a, with one side of the outer circumference of the knob protruding outside the chassis 1a. In addition, these two knobs 13,
14 does not have a rotating shaft, and is slidably held on the outer periphery by the peripheral walls of the knob storage recesses 7 and 8 to rotate.

The lower surface of the tuning knob 13 has an opening 7 provided in the bottom surface of the tuning knob storage recess 7.
A gear part (not shown) rotatably inserted into a
The operating gear 12a of the tuning variable capacitor 12 is connected to the tuning knob 1 via an intermediate gear 15 rotatably held in a circular recess 9 formed on the lower surface of the chassis 1a.
It is meshed with gear part 3. Note that a circular sheet 13a on which a frequency scale is printed is adhered to the upper surface of the tuning knob 13.

Reference numeral 16 denotes a volume electrode substrate disposed on the lower surface of the chassis 1a in correspondence with the volume adjustment knob storage recess 8. On the upper surface of the volume electrode substrate 16, a pair of semicircular arc-shaped volume electrodes 17a, 17b are arranged. is formed. This volume electrode substrate 16 is an extremely thin one in which volume electrodes 17a and 17b are formed on a resin film. and its end is connected to the wiring board 1
Connected to 0.

The volume adjustment knob 14 has a pair of spring contacts (not shown) protruding from its lower surface, and the pair of spring contacts are inserted into an opening 8a provided at the bottom of the volume adjustment knob storage recess 8. It is inserted through and comes into contact with the volume electrodes 17a, 17b of the volume electrode substrate 16.

On the other hand, in FIGS. 1 and 2, 18 is a battery storage section formed on the other end side of the chassis 1a, and this battery storage section 18 is open to the outer surface of the chassis 1a, that is, the side surface of the receiver case 1. and
A case side opening of this battery storage section 18 serves as a battery insertion port 18a. This battery storage section 18
is said to have an almost U-shaped planar shape,
Battery holder locking grooves 19, 19 are formed on both sides of the inner arcuate portion.

Further, 20 is a battery holder that is removably inserted into the battery storage section 18. This battery holder 2
0 has a contact 22a that contacts the negative electrode surface of a coin-shaped battery B on the lower surface of a synthetic resin holder main body 21 that has a battery fitting part 21a that is open at the tip side and has a grip part 21b integrally formed on the outer end. The cut and formed conductive metal plate 22 is fixed to form the battery fitting part 21a.
This battery plate 22 supports the coin-shaped battery B fitted in the battery plate 22, and both sides of the tip side of the holder main body 21 (both sides of the open end side of the battery fitting part 21a)
is an elastic piece that can be elastically deformed inside the battery fitting part 21a, and the battery storage part 18 is attached to the tip of the elastic piece.
Locking pawls 23, 23 are formed to engage with battery holder locking grooves 19, 19 provided in the battery holder. Furthermore, a negative electrode terminal 22b is provided on one side of the battery holder 20. This negative electrode terminal 22b is formed by bending a protrusion formed on one side of the metal plate 22 so as to contact the side surface of the holder main body 21,
The upper end of this negative electrode terminal 22b is folded over the upper surface of the holder main body 21.

The battery holder 20 is attached to the battery compartment 18 of the chassis 1 by being pushed into the battery compartment 18 through the battery insertion opening 18a. ,
Both sides of the tip side of the holder main body 21 are the battery storage portions 18.
When the battery holder 20 is pushed by the arc-shaped portion and elastically deforms inward, and the battery holder 20 is completely pushed into the battery storage section 18, the locking claws 23, 2
3 is the battery holder locking groove 19, 1 of the battery storage section 18
9 and the battery holder 20 is locked. In addition, when removing the battery holder 20 for battery replacement, it is sufficient to grasp the grip part 21b and pull the battery holder 20. When the battery holder 20 is pulled strongly, the locking claws 23, 23 are attached to the battery holder by this pulling force. Since it is removed from the locking grooves 19, 19, the battery holder 20 can be pulled out.

Further, at the inner inner end and inner inner side of the battery storage section 18, a positive electrode side battery spring 25 that contacts the side surface (positive electrode surface) of the coin-shaped battery held in the battery holder 20, and a battery holder 20 are provided. A negative electrode side battery spring 26 is provided which contacts the negative electrode terminal 22b of the negative electrode terminal 22b. The positive electrode side battery spring 25 connects one end of the conductive metal piece 24 fixed to the upper surface of the chassis 1a to the battery storage section 1.
It is bent and formed so as to protrude within 8,
The other end of this metal piece 24 is connected to the wiring board 10. Further, the negative electrode side battery spring 26
is held in a groove provided in the chassis 1a with one end protruding into the battery storage section 18. The other end of this negative battery spring 26 is bent into an L-shape and is a movable contact spring 26a that faces a fixed contact piece 27 attached to the chassis 1a.
The fixed contact piece 27 and the movable contact spring 26a constitute a power switch.

Further, as shown in FIG. 1, a pair of earphone jack springs 28, 28 are attached to the upper surface of the chassis 1a in line with the fixed contact piece 27, and the earphone jack springs 28 are attached to the end surface of the chassis 1a. , 28, an insertion opening 29 for the earphone side plug 30 is provided. Note that the earphone jack springs 28, 28 are connected to the wiring board 10.

The earphone side plug 30 has a pair of flat terminal blades 31, 31 protruding from its end surface, and the flat terminal blades 31, 31 enter the lower side of the earphone jack springs 28, 28 and connect with the earphone jack springs 28, 28. They are adapted to contact earphone jack springs 28, 28, respectively. Further, the tip of the movable contact spring 26a is bent toward the plug insertion port 29, and the tip of the movable contact spring 26a is pushed by the end surface of the main body of the earphone side plug 30 to connect the fixed contact. It is adapted to be contacted by the piece 27.

This FM dedicated radio receiver is based on the chassis 1.
parts such as a wiring board 10, a tuning variable capacitor 12, a tuning knob 13, and a volume adjustment knob 14 are assembled into the chassis 1, and a top sheet 2 and a back sheet 3 are glued to both the top and bottom surfaces of the chassis 1. , this FM
The thickness of the dedicated radio receiver is approximately 2.0mm.

That is, among the parts assembled into the chassis 1a, the thickest one is the tuning variable capacitor 12;
The thickness is approximately 1.4 mm (commercially available products are available),
The chassis 1a only needs to be thick enough to accommodate the tuning variable capacitor 12,
In addition, the thickness of the top sheet 2 and back sheet 3 (the total thickness of the decorative sheet and the reinforcing stainless steel sheet)
is about 0.3mm, so the total thickness of this radio receiver is about 2.0mm.

In this radio receiver, as described above, the battery mounting structure is such that a battery storage section 18 that opens on the side surface of the case is provided in the receiver case 1, and the opening, that is, the battery insertion port 18a, is provided in the battery storage section 18.
Since the structure is such that the battery B held in the current holder 20 which is removably inserted into the battery compartment 18 is mounted in the battery compartment 18 by inserting the battery holder 20 into the battery compartment 18, The width of the battery insertion slot 18a should just be the width equivalent to the height of the battery holder 20. Since the height of the battery holder 20 is only slightly higher than the thickness of the coin-shaped battery B, the width of the battery insertion slot 18a is As shown in FIG. 3, it can be made so small that it is almost unnoticeable, and since the battery insertion slot 18a is located on the side that cannot be seen from the back or front of the radio receiver, it can be made small enough to be hardly noticeable. Since only the grip portion 21b of the battery holder 20 is visible from the inside, the appearance of the radio receiver can be improved.

In the above embodiment, the battery mounting structure in an FM-only radio receiver has been described, but the present invention can also be applied to a battery mounting structure in an AM-only radio receiver, a FM/AM common radio receiver, or an FM/AM/SM common radio receiver. It goes without saying that the present invention can also be applied to battery mounting structures in thin electronic devices other than radio receivers, such as small electronic calculators.

〔Effect of the invention〕

According to this invention, since the battery fitting part of the battery holder is formed by a pair of side pieces with open ends, the overall length is shortened, and it is possible to miniaturize the electronic device accordingly. Moreover, since at least one side piece of the battery holder is elastically deformed toward the battery fitting part by an arc-shaped portion formed in the battery compartment of the chassis, the bottom of the battery holder and the battery compartment of the chassis are elastically deformed. This has the effect that the thickness of the electronic device can be made much thinner compared to a structure in which the engaging portion is provided at a portion corresponding to the bottom of the battery holder.

[Brief explanation of drawings]

Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is an exploded perspective view of a radio receiver, Figure 2 is an enlarged plan view of a battery mounting section, and Figure 3 is a radio receiver. It is an external perspective view of the machine. FIGS. 4 and 5 are perspective views showing conventional battery mounting structures, respectively. 1...Receiver case, 18...Battery storage section, 1
8a...Battery insertion slot, 20...Battery holder, B...
...coin battery.

Claims (1)

[Scope of Claims] 1. A battery fitting portion for housing a coin-type battery is formed by a pair of side pieces with open ends, and at least one of the pair of side pieces is elastically deformable toward the battery fitting portion. A holder body made of synthetic resin and having a locking pawl at its tip; a battery holder having a conductive metal plate fixed to the bottom surface of the holder body; and a battery storage part opened on the side surface. The battery accommodating portion includes a chassis in which an inner deep portion is formed in an arc shape and is provided with a locking groove for engaging the locking claw of the battery holder, and the battery fitting portion is provided with a chassis. The battery holder with the coin-type battery fitted therein is pushed through the opening of the battery housing, the side pieces of the holder main body are elastically deformed inward by the arcuate portions of the battery housing, and the locking groove is positioned. 1. A battery mounting structure for a thin electronic device, characterized in that the locking pawl is inserted into and engaged with the locking groove after the battery is restored.