JPH11168536A - Portable electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable electronic equipment capable of maintaining an electric connection state between its equipment main body and an attachment even when an external shock is exerted to the equipment. SOLUTION: In this portable telephone set (portable electronic equipment) 1, plural contact pins (main body side contacts) 11, 12 whose natural frequencies differ from each other in contact with a contact plate (attachment side contact) 3C in a battery pack (attachment) 3 are provided in a telephone set main body (equipment main body) 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises an apparatus main body and an attachment detachably attached to the apparatus main body. When the attachment is mounted on the apparatus main body, the main body side contact is pressed against the attachment side contact. Accordingly, the present invention relates to a portable electronic device configured to electrically connect a device main body and an attachment.

[0002]

2. Description of the Related Art As shown in FIG. 8, a portable telephone (portable electronic device) A comprising a telephone body B as an apparatus main body and a battery pack C as an attachment is provided on the battery pack C. For the plurality of contact plates Ca, Ca, Ca, the telephone body B is provided with contact pins Ba, Ba, Ba corresponding to each contact plate Ca on a one-to-one basis. These contact pins Ba, Ba, Ba are provided so as to be movable in a direction approaching and separating from the contact plate Ca, respectively, and are provided by a coil spring Bb.
When the battery pack C is attached to the telephone body B, each contact pin B
a, Ba, Ba, each contact plate Ca, Ca,
By pressing against Ca, the telephone body B and the battery pack C are electrically connected.

[0003]

By the way, in the portable telephone A having the above-mentioned structure, when a shocking external force such as vibration acts during a call and the contact pin Ba moves against the urging force of the coil spring Bb. When the contact pins Ba are separated from the contact plate Ca, the power supply from the battery pack C to the telephone body B is momentarily interrupted,
As a result, the call is interrupted, and there is a problem that the call is not restored to the original state. The present invention has been made in view of the above circumstances, and has as its object to provide a portable electronic device capable of maintaining an electrical connection state between a device main body and an attachment even in a situation where a shocking external force is applied. Is what you do.

[0004]

In order to achieve the above object, the present invention provides an apparatus main body and an attachment detachably attached to the apparatus main body, wherein the apparatus main body has a contact with an attachment-side contact of the attachment. A main body contact that is movable in the direction of approaching and separating and is urged toward the attachment side contact is provided, and the main body side contact is pressed against the attachment side contact in a state where the attachment is attached to the main body of the apparatus, thereby making the main body of the equipment main body. A portable electronic device configured to electrically connect the electronic device and the attachment, the device body of the portable electronic device includes a plurality of contacts having different natural frequencies with respect to one attachment-side contact in the attachment. A body-side contact is provided.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings showing one embodiment. FIGS. 1 and 2 show an example in which the present invention is applied to a mobile phone. A mobile phone 1 as a portable electronic device according to the present invention includes a phone main body 2 as a device main body, and a telephone main body 2. A battery pack 3 as an attachment detachably attached to the battery pack 3.

[0006] On the mounting surface 3a of the battery pack 3, three contact plates 3C, 3C, 3C are arranged at appropriate intervals. Incidentally, the above-mentioned three contact plates 3C, 3C, and 3C are a plus terminal for supplying power, a minus terminal for supplying power, and a thermistor terminal used for controlling the temperature of the battery cell.

On the other hand, when the battery pack 3 is mounted on the telephone body 2, the contact plate 3
The connector unit 10 is provided on the board 2B at positions corresponding to C, 3C, and 3C so as to be exposed from the pack mounting surface 2a.

The connector unit 10 includes contact plates 3C, 3C, 3C of the battery pack 3 described above.
C, three contact pins 11, 11, 11
And three contact pins 12, 12, 12. For one contact plate 3 </ b> C, a total of two contacts of one contact pin 11 and one contact pin 12 are provided. The pins will correspond.

As shown in FIGS. 2 to 4, the connector unit 10 includes a body 13 mounted on a board 2B,
Three guide sleeves 1 provided on the body 13
And four and three guide sleeves 15,
Each guide sleeve 14 accommodates a contact pin 11 movably, and each guide sleeve 15 accommodates a contact pin 12 movably.

Further, the contact pin 11 is moved by a coil spring S1 housed in a guide sleeve 14 as shown in FIG.
The contact pin 12 is urged toward the contact plate 3C, like the contact pin 11, by the coil spring S2 housed in the guide sleeve 15. I have.

Reference numerals 14a and 15a in FIG. 4 denote flanges formed in the upper opening of the guide sleeve 14 and the upper opening of the guide sleeve 15 to prevent the contact pins 11 and 12 from coming off. Reference numerals 16 in FIGS. 2 and 3 denote positioning pins provided on the body 13.

When the battery pack 3 is mounted on the telephone body 2, the contact pins 11 and 12 of the connector unit 10 abut against the contact plate 3C of the battery pack 3 and are slightly pushed in, and the coil spring S1 and the coil spring S1 are pressed. Each of them is pressed against the contact plate 3C by the elastic restoring force with S2.

As is apparent from FIG. 4, the contact pin 11 and the contact pin 12 have different outer diameters and wall thicknesses, and therefore have different masses. And coil spring S2
Since the outer diameter and the number of windings are different between and, the spring constants are different from each other.

Here, assuming that the mass of the contact pin 11 is m1, the spring constant of the coil spring S1 is k1, the mass of the contact pin 12 is m2, and the spring constant of the coil spring S2 is k2, the natural frequency f1 of the contact pin 11 is The natural frequency f2 of the contact pin 12 is expressed by the following equation.

[0015]

(Equation 1)

As is apparent from this equation, the natural frequency of the contact pin 11 and the natural frequency of the contact pin 12 are different from each other due to the difference in mass and spring constant.

Further, since the natural frequencies are different, the operation timing of the contact pin 11 when a shocking external force such as vibration is applied, and the contact pin 1
2 will be shifted from each other as described below.

As shown in FIG. 5 (a), when the contact pin 11 and the contact pin 12 are normally pressed against the contact plate 3C under normal conditions and an external force such as vibration acts on the contact plate 3C as described above, Based on the difference in the natural frequency, the contact pin 11 first moves as shown in FIG. 5B, returns to the normal state after being separated from the contact plate 3C, and then returns to the normal state as shown in FIG. 5C. 12 moves and returns to the normal state after being separated from the contact plate 3C.

FIG. 6 is a timing chart showing the intermittent state between the contact plate 3C and the contact pins 11 and 12. As is clear from FIG. 6, the contact pin 11 is at t1 as shown by the line L11. The contact pin 12 is separated from the contact plate 3C between -t2 and t3 -t4, as shown by the line L12.

That is, even when one of the contact pins is separated from the contact plate 3C, the other contact pin is in contact with the contact plate 3C, and the contact pins 11 and 12 are simultaneously moved from the contact plate 3C. There is no separation.

As described above, the portable telephone 1 having the above-described configuration is used.
Then, the contact pin 1 in the connector unit 10
By making the natural frequencies of the contact pin 1 and the contact pin 12 different from each other, the electrical connection between the telephone body 2 and the battery pack 3 can be maintained even in a situation where an external force such as vibration acts.

Thus, during a call by the mobile phone 1,
Even when an external force such as vibration is applied, the power is supplied from the battery pack 3 to the telephone main body 2 without an instantaneous interruption, so that a problem such as disconnection of a call is prevented beforehand.

The mass m1 of the contact pin 11 and the mass m2 of the contact pin 12 or the spring constant k1 of the coil spring S1 and the spring constant k of the coil spring S2
It is needless to say that the natural frequency f1 of the contact pin 11 and the natural frequency f2 of the contact pin 12 can be arbitrarily set by changing parameters such as 2.

Further, according to the above configuration, 1
Since the two contact pins 11 and 12 are in contact with the three contact plates 3C, a reduction in the contact resistance value at the connection between the telephone body 2 and the battery pack 3 is expected.

The portable telephone 1 'shown in FIG. 7 is replaced with the connector unit 10 of the portable telephone 1 shown in FIGS. 22 is provided on the substrate 2B '. When the battery pack 3' is mounted on the telephone body 2 ', the contact lever 21 and the contact lever 22 are pressed against the contact plate 3C' of the battery pack 3 '. I have.

Here, since the natural frequency is determined by the mass and the spring constant as described above, the mass of the contact lever 21 and the mass of the contact lever 22 are made different, or the parameters such as the plate thickness and the plate width are changed. The natural frequency of the contact lever 21 and the contact lever 22 can be arbitrarily set by a method such as changing the spring constant of the contact lever 21 and the contact lever 22 by changing the spring constant.

The structure of the above-mentioned portable telephone 1 'is the same as that of FIG.
To the mobile phone 1 shown in FIG.
In addition, the operation and effect are the same as those of the above-described mobile phone 1, so that the detailed description is omitted.

In the above-described embodiment, the portable telephone including the telephone main body and the battery pack is exemplified. However, the portable telephone is used by attaching the battery pack to the main body such as a portable information terminal device and a VTR camera. Of course, the present invention can be effectively applied to various devices.

Further, in the above-described embodiment, a portable telephone provided with a battery pack as an attachment has been exemplified. However, various portable electronic devices such as a communication device and a VTR camera having a speaker unit, a transmitter unit and the like as attachments. It goes without saying that the present invention can also be applied effectively.

[0030]

As described above in detail, in the portable electronic device according to the present invention, a plurality of main units having different natural frequencies from one attachment side contact in the attachment are attached to the main unit. Contact is provided. According to the above configuration, when vibration or the like acts, the operation timings of the plurality of main body side contacts are shifted from each other, and the plurality of main body side contacts are not separated from the attachment side contact at the same time, and The contact comes into contact with the attachment-side contact. Therefore, according to the portable electronic device according to the present invention, it is possible to maintain the electrical connection state between the device main body and the attachment even in a situation where a shocking external force acts.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a portable electronic device according to the present invention.

FIG. 2 is a sectional side view showing a main part of a portable electronic device according to the invention.

FIGS. 3 (a), (b) and (c) are a front view, an end view and a side view showing a connector unit.

FIG. 4 is a sectional view of the connector unit taken along line IV-IV in FIG. 3;

FIGS. 5A, 5B, and 5C are conceptual diagrams showing an operation mode of each contact pin in the connector unit.

FIG. 6 is a timing chart showing an operation mode of each contact pin in the connector unit.

FIG. 7 is a sectional side view of a main part showing another embodiment of a portable electronic device according to the present invention.

FIG. 8 is a sectional view of a main part showing a conventional portable electronic device.

[Explanation of symbols]

1, 1 ': mobile phone (portable electronic device), 2, 2': phone body (device body), 3, 3 ': battery pack (attachment), 3C, 3C': contact plate (attachment side contact), DESCRIPTION OF SYMBOLS 10 ... Connector unit, 11 ... Contact pin (body side contact), 12 ... Contact pin (body side contact), 21 ... Contact lever (body side contact), 22 ... Contact lever (body side contact).

Claims (1)

[Claims] 1. An apparatus comprising: a device main body; and an attachment detachably attached to the device main body, wherein the device main body is movable in a direction approaching and separating from an attachment-side contact of the attachment, and the attachment-side contact. A main body side contact is provided which is biased toward the main body, and in a state where the attachment is mounted on the main body of the apparatus, the main body side contact is pressed against the attachment side contact to electrically connect the main body of the apparatus and the attachment. A portable electronic device configured to be connected to the device main body, wherein the device main body is provided with a plurality of main body side contacts having different natural frequencies from one attachment side contact in the attachment. A portable electronic device characterized by the following.