JPH08787Y2 - Waterproof structure for electronic devices - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power source section for supplying electric power to an electronic equipment body and a waterproof structure of the electronic equipment for connecting to the electronic equipment body and waterproofing electrodes.

[0002]

2. Description of the Related Art Onboard communication equipment used for communication between ships or between ships, between ships and piers, etc. for maneuvering, cargo handling, rescue, etc., or a portable radiotelephone device for maritime mobile services. There is. As is apparent from the method of use, it is a device that uses a battery (power supply unit), and depending on the state of use, it may be necessary to replace the battery during work. In this case, if the battery is removed from the device body (electronic device body) with a screw or the like, the work is troublesome and urgent communication is hindered.

Therefore, as shown in FIGS. 3 and 4, the electronic equipment main body and the power supply section have a lower surface (joint surface) of the electronic equipment main body 1 in order to detachably join the power supply section 2 and the electronic equipment main body 1 to each other. 1a) and the power supply unit 2 having fitting portions 1b and 2b provided on the upper surface (joint surface 2a) thereof (Japanese Utility Model Laid-Open No. 63-195201). That is, the rail-shaped hook portions 1c, 2 parallel to the fitting portions 1b, 2b are provided.
c is formed. Then, the fitting parts 1b, 2b of the electronic device body 1 and the power supply part 2 are slid so as to abut each other, thereby joining the both. As a result, the power supply terminal 3a and the electrode 4a are electrically connected, and the power supply terminal 3b and the electrode 4b are electrically connected.

[0004]

However, in the communication equipment on board the ship, seawater or water enters the fitting portions 1b and 2b when exposed to waves or rain. Therefore, a leak current flows between the electrodes 4a and 4b. When seawater enters between the electrodes 4a and 4b, 100 mA is initially applied between the electrodes 4a and 4b, and then 4
A current of 0 to 50 mA flows, and the battery is discharged at about 20H when fully charged. Therefore, not only the power consumption of the power supply unit 2 but also the damage of the electronic device, the influence on the operator, and the like become a problem.

Further, corrosion of the electrodes occurs, which affects the contact failure and the service life of the power supply section and the like. Therefore, it is required that the electronic equipment such as the communication equipment on board has a waterproof structure. However, it has been difficult to make the electronic device body 1 and the power supply unit 2 detachably joined to each other and to make them waterproof.

That is, the problems required for the electronic equipment such as the onboard communication equipment are summarized as a) to c) below. a) Small size and light weight. b) The battery can be handled easily and quickly. c) No leak current flows between the electrodes 4a and 4b.

[0007]

In order to solve the above-mentioned problems, an electronic device body 1 and a power source (battery) 2 of the present invention, which are detachably joined to each other by being fitted to each other.
Power supply terminals 3a and 3b for electrically connecting and the electrode 4a,
In the waterproof structure of 4b, only the electronic circuit housed in the electronic device body 1 and the electrodes of different potentials are covered with the flexible member.

Specifically, the waterproof wall 5 satisfying the following conditions is provided. One end contacts and is fixed to the joint surface 1a of the electronic device body 1. Of the electrodes, only the power supply terminal 3a and the electrode 4a which are not at the same potential as the reference potential of the electronic circuit are covered. At least, the wall has flexibility in the joining direction. When the electronic device body and the power supply unit are fitted to each other, the other end of the waterproof wall contacts the joint surface of the power supply unit.

[0009]

According to the waterproof structure of the electronic device constructed as described above, even if seawater enters the fitting portion, one electrode has the waterproof wall 5
It is possible to suppress the generation of leakage current because it is covered with the. In addition, the power supply terminal 3b and the electrode 4b that come into contact with seawater are
Since the electric potential is the same as the reference potential of the electronic circuit and there is no potential difference between the electronic circuit and the power supply terminal 3b or the electrode 4b, no leak current is generated. Furthermore, even if seawater enters the electrodes, the leak current is small because of the waterproof wall 5 and the large electrical resistance between the electrodes.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view showing a state in which a power supply unit 2 is joined to an electronic device main body, FIG. 2A is a bottom view of the electronic device main body, and FIG. 2B is an AA cross section of FIG. It is a figure and shows the part of the electrode of a waterproof structure. In the electronic circuit (not shown) housed in the main body 1 of the electronic device, the case of the electronic component (not shown) is connected to the power supply terminal 3b serving as a reference of the circuit system in order to suppress the influence of noise and the like. . Electrodes 4a, 4
When seawater enters between points b, a leak current is generated, so it is ideal to have a completely waterproof structure.

However, as described above, the electronic device body 1
It is difficult to have a structure in which the power supply unit 2 and the power supply unit 2 are detachably joined to each other and to have a completely waterproof structure. Therefore, in one embodiment of the present invention, the waterproof wall 5 is provided between the power supply terminals 3a and 3b and between the electrodes 4a and 4b to suppress the leak current between the electrodes 4a and 4b. The waterproof wall 5 has a structure that covers the power supply terminal 3a and the electrode 4a, which are not the power supply terminal 3b and the electrode 4b having the same potential (negative potential in this embodiment) as the case of the electronic component. That is, as shown in FIG. 2, one end of the waterproof wall 5 is provided on the joint surface 1 a of the electronic device body 1. Further, the height of the waterproof wall 5 is set slightly higher than the gap where the electronic device body 1 and the power supply unit 2 are joined together, and the other end is flexibly joined to the joining surface 2a of the power supply unit 2. Has become. In addition, the waterproof wall 5 has flexibility such as silicon rubber,
Use a material with excellent corrosion resistance and insulation. The other end may have a bellows-like structure in order to increase flexibility.

In this embodiment, even if seawater enters the power supply terminal 3b and the electrode 4b, the waterproof wall 5 is provided and the electric resistance between the electrodes 4a and 4b is large, so that the leak current is small. Further, the case of the channel changeover switch, the case of the noise squelch switch, and the like, which are electronic parts, have no influence because they have the same potential as the power supply terminal 3b and the electrode 4b. The electronic device body 1 is a molded case, and the electronic device body 1 and the power supply terminals 3a and 3b are insulated. Note that the electrodes are made of carbon or stainless as a countermeasure against corrosion of the electrodes 4a, 4b.

[0013]

As described above, the present invention has a structure in which only the power supply terminals 3a and the electrodes 4a having different potentials from the reference potential of the electronic circuit housed in the electronic device body 1 are covered with the flexible member. Therefore, the following effects were produced. The space for the waterproof structure is small. Since the waterproof wall is small, it can be bonded to the joint surface 1a and the joint surface 2a without unevenness, and the waterproof effect can be improved. Even if seawater enters the fitting portion, since one power supply terminal 3a and the electrode 4a are covered with the waterproof wall 5, it is possible to suppress the generation of leak current between the electrodes. Since the power supply terminal 3b and the electrode 4b that come into contact with seawater have the same potential as the reference potential of the electronic circuit housed in the electronic device body 1, no leak current occurs. Even if seawater enters the power source 3b and the electrode 4b, the waterproof wall 5 is provided and the electric resistance between the electrodes 4a and 4b is large.
Small leakage current.

[0014]

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a power supply unit is joined to an electronic device body.

FIG. 2A is a bottom view of the electronic device main body, showing a bonding surface, and FIG. 2B is a cross-sectional view showing an electrode portion of the waterproof structure.

FIG. 3 is a perspective view showing a state in which a power supply unit is joined to a conventional electronic device body.

FIG. 4 is a perspective view showing a joined state of a conventional electronic device body and a power supply unit.

[Explanation of symbols]

 1 Electronic device body. 1a Bonding surface. 2 power supply section. 2a Bonding surface. 3a, 3b Power supply terminal. 4a, 4b electrodes. 5 Waterproof wall.

Claims (1)

[Scope of utility model registration request] 1. An electronic device body (1) containing an electronic circuit.
A power supply part (2) for supplying electric power to the electronic device body, power supply terminals (3a, 3b) provided on the joint surface (1a) of the electronic device body, and a joint surface (2a) of the power supply part. The electronic device main body and the power supply unit are detachably joined to each other by being fitted to each other, and the power supply terminal and the electrode are electrically connected. A waterproof structure for an electronic device, comprising a waterproof wall (5) satisfying the following conditions. One end is in contact with and fixed to the joint surface of the electronic device body. Of the electrodes, only the power supply terminal (3a) and the electrode (4a) that are not at the same potential as the reference potential of the electronic circuit are covered. At least, the wall has flexibility in the joining direction. When the electronic device body and the power supply unit are fitted to each other, the other end of the waterproof wall contacts the joint surface of the power supply unit.