JP3158646B2 - Printed wiring board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charging terminal device and a printed wiring board suitable for use in, for example, a cordless telephone handset.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a cordless telephone. The cordless telephone has a cordless handset 10 and a charging stand 12. The charging stand 12 can be connected to a power supply 14.

[0003] A battery storage section 20 for storing a battery is provided below the slave unit 10.

FIG. 7 shows a cross section of the lower part of the slave unit 10 shown in FIG. The child device 10 has a front cabinet 22, a rear cabinet 24, and a bottom cabinet 26, and the child device 10 is configured in a foot shape by such a cabinet. The battery storage unit 20 provided at the lower end of the slave unit 10 has a wall 24 extending from the rear cabinet 24.
A, a cabinet 26 at the bottom and a lid 28 on the rear side.

A microphone 30 is arranged at a portion corresponding to a toe of a foot shape, and the cabinet 22 has a hole 32 formed at a position corresponding to the microphone 30. A printed wiring board 34 called an MIC board is arranged behind the microphone 30, and the terminals of the microphone 30 are connected to the printed wiring board 34.

[0006] A charge terminal 40 for contacting the battery is disposed in the battery accommodating section 20, and the charge terminal 40 is referred to as a Han domain substrate via a terminal lead 44 extending therefrom. Printed wiring board 4
6 is connected.

As shown, the charge terminal 40 is bent in a C-shape, and a coil spring 42 is disposed at the bent portion.

The bent portion of the charge terminal 40 is made of a thin conductor and can be easily elastically deformed.

When the battery is placed in the battery housing 20, the electrode of the battery contacts the bent portion of the charge terminal 40, whereby the bent portion of the charge terminal 40 is elastically deformed. The spring constant of the bend of the charge terminal 40 is small, so the biasing force of the coil spring 42 is used to ensure contact between the charge terminal 40 and the battery electrode.

[0010]

In the example shown in FIG. 7, the coil spring 42 is slightly compressed while the charge terminal 4 is kept.
0 and is configured to be supported by a protrusion at the edge of the bent portion.

Therefore, when the coil spring 42 is mounted, the coil spring 42 may be erroneously arranged at a position shifted from the original position.

The charge terminal 40 is connected to the printed wiring board 46 in advance, and is connected to the cabinet 26 at the bottom.
It is difficult to automate the assembling work, and it is inefficient.

In view of the above, an object of the present invention is to streamline the assembling work of the charge terminal 40 disposed in the battery housing 20 and the coil spring 42 attached thereto.

[0014]

According to the present invention, for example, as shown in FIG. 1, a battery charge terminal device is soldered to a first end disposed on an electrode side of a battery and a printed wiring board. And a coil spring having a second end and made of a conductive metal.

According to the present invention, for example, as shown in FIG. 1, in a charge terminal device for a battery, a charge terminal 50 having a cut-and-raised portion 62 is attached to a first end.

According to the present invention, as shown in FIG. 1 or FIG. 3, for example, the printed wiring board has a first end arranged on the electrode side of the battery and a second end soldered to the printed wiring board. And a coil spring 42 made of a conductive metal.

According to the present invention, for example, as shown in FIG. 1 or FIG.
2 is inserted through a hole formed in the printed wiring board 34 and a conductive land 70 formed around the hole.
Soldered to.

According to the present invention, for example, as shown in FIG. 1 or FIG.
A second hole is formed adjacent to the first hole through which the end of the first hole is inserted, and a second conductor land is formed around the second hole; And the second conductive land formed around the second hole are electrically connected to each other.

[0019]

Since the coil spring is soldered to the printed wiring board in advance, the coil spring is automatically mounted by disposing the printed wiring board in a cabinet. The operation of inserting the coil spring 42 into the charge terminal 40 is eliminated, and the operation of soldering the charge terminal 40 to the printed wiring board 46 is eliminated.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5, the same reference numerals are given to the corresponding parts in FIGS. 6 and 7, and the detailed description thereof will be omitted.

FIG. 1 is a partial cross-sectional view of a cordless telephone handset using the charge terminal device and the printed wiring board of the present invention.

The slave unit of the cordless telephone has a front cabinet 22, a rear cabinet 24, and a bottom cabinet 26, and a battery housing portion 20 for housing a battery is formed below the cabinet. .

The battery housing 20 includes a wall 24A extending laterally from the rear cabinet 24 and a vertical wall 24 extending from the end of the wall 24A to the bottom.
B, a cabinet surrounded by a bottom cabinet 26 and a rear lid 28. A hole 24a is formed in the vertical wall 24B.

The charge terminal device of this embodiment has a charge terminal 5
0 and the coil spring 42, the charge terminal 50 is disposed in a hole 24a formed in the vertical wall portion 24B.
Incidentally, the charge terminal device may be constituted only by the coil spring 42. In such a case, the end of the coil spring 42 would be in direct contact with the electrode of the battery, and therefore the end of the coil spring 42 may preferably be provided with a suitable projection.

FIG. 2 shows an example of such a charge terminal 50. The charge terminal 50 has a plate portion 60, a cut-and-raised portion 62 formed at a central portion thereof, and a locking portion 66 formed at a lower end portion. The cut-and-raised portion 62 is configured to form, for example, two projecting pieces and a hole 64 therebetween. The locking portion 66 extends from the lower end of the plate portion 60 to a surface opposite to the surface on which the cut and raised portion 62 is formed, and the end portion is bent.

As shown in FIG. 1, the locking portion 66 is mounted on the edge of the hole 24a of the vertical wall portion 24B, whereby the charge terminal 50 is fixed to the vertical wall portion 24B. That is, the charge terminal 50 has a cantilever support structure in which the locking portion 66 is a supporting portion and the other end is a free end.

The charge terminal 50 is made of a thin conductive metal, for example, tin-plated or silver-plated phosphor bronze, and its plate portion 60 is formed as a leaf spring having a small spring constant so that it can be easily deformed.

The cut-and-raised portion 62 is, as shown in FIG.
The vertical wall 2 extends from the hole 24a of the vertical wall 24B.
4B protrudes into the battery accommodating portion 20 beyond the inner surface of the battery 4B. A terminal plate 52 may be further disposed at the tip of the cut-and-raised portion 62 as shown in the figure, or the tip of the cut-and-raised portion 62 may be bent laterally.

A hole 24a formed in the vertical wall 24B of the battery housing 20 has a shoulder 24b formed at the bottom thereof. The shoulder 24b functions as a stopper for limiting the displacement of the charge terminal 50. I do.

When the battery is accommodated in the battery accommodating portion 20, the electrode of the battery comes into contact with the charge terminal 50 and the plate portion 60 of the charge terminal 50 is displaced. When the free end of the plate portion 60 abuts the shoulder portion 24b of the hole 24a, further displacement is prevented.

Referring again to FIG. 1, a microphone 30 is arranged at the front end of the slave unit.
The printed wiring board 34, that is, the MIC board is disposed behind the back. The printed wiring board 34 is connected to the printed wiring board 46 by lead wires 48.

A coil spring 42 is arranged between the printed wiring board 34 and the charge terminal 50. A biasing force is applied to the charging terminal 50 by the coil spring 42, and the biasing force ensures contact between the charging terminal 50 and the electrode of the battery stored in the battery storage unit 20.

The coil spring 42 is soldered to the printed wiring board 34. FIG. 3 shows such a printed wiring board 34.
Shows a coil spring 42 soldered to FIG. The printed wiring board 34 is provided with a hole 34A.
A land 70 of a conductor is arranged around A. In this example, the land 70 is disposed around the hole 34A on both sides of the printed wiring board 34, and a conductor through is formed along the inner surface of the hole 34A so as to electrically connect the lands 70 on both sides. I have.

The coil spring 42 has at its lower end an end 42A extending in the axial direction. The end 42A is inserted into the hole 34A of the printed wiring board 34 as a lead terminal. As shown, the end 42A of the coil spring 42 and the land 70 are soldered so as to be electrically connected.

FIG. 4 shows an example of the land 70 arranged in the hole 34A of the printed wiring board 34. This example shows a case where copper 80 is mounted on the inner surface of the hole 34A of the printed wiring board 34 to form a copper through.

FIG. 4A shows the shape of a land 70 arranged on the upper surface of the printed wiring board 34, FIG. 4B shows a cross section of the printed wiring board 34, and FIG. Is shown.

The top land 70A shown in FIG. 4A is formed in a suitable shape, for example, a petal shape, so as to function as a spring seat for the coil spring 42. Thereby,
For example, even when the soldering between the end portion 42A of the coil spring 42 and the land 70 becomes defective and the electrical contact due to the soldering becomes poor, the coil spring 42 and the land
The electrical contact between 0 and 0 can be sufficiently maintained.

A wiring pattern 74 is connected to a land 70B on the lower surface shown in FIG. 4C.
Is covered with a solder resist.

FIG. 5 shows another example of the land 70 disposed in the hole 34A of the printed wiring board 34. This example shows a case where silver 82 is mounted on the inner surface of the hole 34A of the printed wiring board 34 to form a silver through.

FIG. 5A shows the shape of a land 70 arranged on the upper surface of the printed wiring board 34, FIG. 5B shows a cross section of the printed wiring board 34, and FIG. Is shown.

As shown in FIG. 5A, also in this example, the land 70A on the upper surface is formed in a petal shape so as to function as a spring seat for the coil spring 42. Therefore,
Even if the soldering between the end 42A of the coil spring 42 and the land 70 becomes defective and the electrical contact due to the soldering becomes poor, the electrical contact between the coil spring 42 and the land 70 is sufficiently maintained. Can be done.

In this example, the printed wiring board 34 has a first hole 34A in which the end 42A of the coil spring 42 is mounted, and a second hole 34B adjacent to the first hole 34A. No silver is mounted on the inner surface, and a silver through is formed only on the inner surface of the second hole 34B.

As shown in FIGS. 5A and 5C, second lands 90A and 90B are arranged around the second hole 34 on both sides of the printed wiring board 34, and further, the first land Wiring patterns 92A and 92B for connecting 70A and 70B to the second lands 90A and 90B are mounted.

The second lands 90A and 90B and the wiring patterns 92A and 92B are covered with solder resists 94A and 94B.

Thus, by providing holes and lands for soldering the coil spring 42 on the printed wiring board 34, the coil spring 42 can be mounted in the same process as the electronic component.

Further, the charging terminal can be mounted on the wall 24B of the cabinet separately from the mounting process of the coil spring 42, so that the operation process can be appropriately selected and the efficiency can be improved.

Although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that the present invention is not limited to the above-described embodiments and can adopt various other configurations without departing from the gist of the present invention. It will be easily understood.

[0048]

According to the present invention, the charging terminal 50 is mounted on the cabinet wall 24B and the coil spring 42 is soldered to the printed wiring board 34. There is an advantage that the step of inserting into the curved portion is eliminated, and the work process can be made more efficient.

According to the present invention, the coil spring 42 can be mounted on the wall portion 24B of the cabinet separately from the process of mounting the charge terminal 50, so that the work process can be appropriately selected and the assembling process can be made more efficient. There are advantages that can be.

According to the present invention, since the printed wiring board 34 on which the coil spring 42 is mounted in advance can be arranged behind the battery housing section 20, there is an advantage that the assembling work can be performed automatically.

[Brief description of the drawings]

FIG. 1 is a diagram showing a use state of a charge terminal device of the present invention.

FIG. 2 is a diagram illustrating an example of a charge terminal.

FIG. 3 is a diagram showing an example of a charge terminal device of the present invention.

FIG. 4 is a diagram illustrating an example of a land mounted on a printed wiring board.

FIG. 5 is a diagram showing another example of a land mounted on a printed wiring board.

FIG. 6 illustrates an example of a cordless telephone.

FIG. 7 is a diagram illustrating a use state of a conventional charge terminal device.

[Explanation of symbols]

 Reference Signs List 10 slave unit 12 charging stand 14 power supply 20 battery storage unit 22, 24 cabinet 24A, 24B wall 24a hole 24b shoulder 26 cabinet 28 cover 30 microphone 32 hole 34 printed wiring board 34A hole 38 solder 40 charging terminal 40A end 42 coil Spring 44 Terminal lead 46 Printed wiring board 48 Lead wire 50 Charging terminal 52 Terminal plate 60 Plate part 62 Cut-and-raised part 64 Hole 66 Locking part 70, 70A, 70B Land 74 Wiring pattern 80 Copper 82 Silver 90A, 90B Land 92A, 92B Wiring pattern 94A, 94B Solder resist

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI H05K 3/40 H04B 7/26 Y (56) References Japanese Utility Model Sho 55-140257 (JP, U) Japanese Utility Model Sho 62-62763 ( JP, U) JP-A 52-126218 (JP, U) JP 2-37449 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04M 1/02 H01H 1/06 H01M 2/10 H05K 3/34 505 H05K 3/40

Claims (2)

(57) [Claims] 1. A printed wiring board having a first end disposed on the electrode side of a battery and a second end soldered to the printed wiring board and having a coil spring made of a conductive metal mounted thereon. In the above, the second end of the coil spring is inserted into a conductor through hole formed in the printed wiring board, and the second end forming portion of the coil spring includes the conductor through hole position. A printed wiring board, which is in contact with the conductive land on the first surface among the conductive lands formed on both surfaces of the board and is soldered to the conductive land on the second surface. 2. The printed wiring board according to claim 1, wherein a second hole is formed adjacent to the first hole through which the second end of the coil spring is inserted, and the second hole is formed. , A second conductor land is formed around the first hole, and a second conductor land is formed around the second hole. Is a printed wiring board electrically connected to each other.