JPH0635367Y2 - Electronic device with built-in battery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Field of the Invention >> The present invention relates to an electronic device suitable for easily removing a backup battery contained in a device and reducing the explosive force of the battery.

《Summary of the Invention》 This invention coats the outer periphery of the battery built into the equipment with a buffer coat resin such as silicon resin, and the battery is molded with an epoxy resin through the buffer coat resin as usual. The battery can be easily taken out at the time of failure analysis and the explosive force of the battery can be weakened even if the electronic device is accidentally incinerated.

<< Prior Art and Its Problems >> FIG. 5 is a cross-sectional view of an electronic device used in an article identification system such as automatic distribution of conveyor goods, destination control of a carrier, or automation of warehouse management. Is shown.

That is, this electronic device is an SR that stores in the case 1 a sensor unit 2 that responds to an external signal and necessary information in a rewritable manner.
An electronic circuit board 5 on which AM3 and other electronic components 4 are mounted, a backup battery 6 are built in, and a display plate 8 on which the model of the device, precautions for use, warnings, etc. are described
In addition to being built in, the case 1 is filled with an epoxy resin 7 and resin-molded in order to improve environmental resistance such as water resistance and oil resistance.

Therefore, in order to use such an electronic device in the above-described article discrimination system, first, with necessary information being input to the electronic device, the electronic device is attached to a predetermined cargo, which is, for example, a detected object, and is placed on the taxiway along with the cargo. To move.

On the other hand, on the taxiway, a master unit that reads information from the electronic device is installed, and when the electronic device passes through the master unit along with the cargo, a signal is sent from the master unit and the signal is received by the sensor unit of the electronic device. Necessary information is replied from the electronic circuit, and the master unit reads the responsive information to determine the type of cargo and the like, and sends the necessary command such as the destination.

By the way, many of these electronic devices are disposable ones that are used up until the backup battery 6 for driving is exhausted and are discarded after the exhaustion. Therefore, the battery 6 has a long life (about 10 years). Due to the above requirements, batteries having a high degree of sealing are often used.

However, since such a battery 6 has a great explosive power at high temperature, and the filled epoxy resin 7 has a high flammability, it will explode at a dash when discarded electronic equipment is incinerated, which is very difficult. There is a problem that it is dangerous.

Further, in the case of performing a failure analysis or the like, the epoxy resin 7 cannot be removed unless it is heated or melted with a chemical, and the workability of taking out the battery 6 is poor and dangerous. .

Further, since the epoxy resin 7 usually has a large adhesive force, the stress on the battery 6 is large, and therefore, the influence on the inside of the battery 6 cannot be ignored, and the stable operation of the battery 6 cannot be ensured. ing.

<Purpose of Invention> This invention was made in view of the above problems. The purpose of this invention is to make it possible to easily take out the battery built into the equipment and to make the battery explosive. The purpose of the present invention is to provide an electronic device capable of weakening.

<< Structure and Effect of Device >> This device has a backup battery and a sensor unit that responds to an external signal and an electronic circuit board on which various electronic components are mounted in order to achieve the above object. In an electronic device in which a battery is built in, and the inside of the case is resin-molded with an epoxy resin, the outer periphery of the backup battery is coated with a buffer coat resin such as silicon resin, and the battery is provided with the buffer coat resin. It is characterized by being molded with an epoxy resin.

That is, in the present invention, the battery built in the electronic device is coated with a buffer coat resin such as a silicone resin on the outer periphery thereof, and is resin-molded with an epoxy resin through the buffer coat resin. Since it is configured, the electronic device can secure excellent environmental resistance performance as before, and since the adhesive force does not work between the mold resin and the buffer coat resin, the battery can be easily removed by removing the mold resin a little. You can take it out.

Therefore, at the time of failure analysis, the battery can be taken out first, and then other parts can be removed by heating or chemicals, so that the analysis work can be performed safely and with good workability.

In addition, since the buffer coat resin that coats the outer periphery of the battery has lower flammability than epoxy resin, even if you accidentally incinerate an electronic device, it may take longer to explode and weaken the explosive force. Therefore, the safety of this type of device can be improved.

Furthermore, since the battery is not directly subjected to the stress of the epoxy resin as in the conventional case, there is an effect that a stable operation of the battery can be secured.

<< Description of Embodiments >> Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the same members as those of the related art will be described with the same reference numerals.

FIG. 1 is a sectional view of an electronic device with a built-in battery according to the present invention. In FIG. 1, reference numeral 1 is a case 1 forming an outer wall of the device.

Partition walls 1a, 1a are projectingly provided in the case 1, and a sensor unit 2 that responds to an external signal is provided on one side of the partition wall 1a.
And an electronic circuit 5 on which the SRAM 3 for rewritably storing necessary information and other various electronic components 4 are mounted.

Reference numeral 8 is a display plate on which the type of equipment, precautions for use, warnings, etc. are described as shown in FIG.

A backup battery 6 for driving an electronic device is inserted between the partition walls 1a and 1a, and a silicon resin having a lower flammability and an adhesive force than an epoxy resin is buffer-coated on the outer periphery of the battery 6. It is coated as 9.

A transparent epoxy resin 7 is filled in the case 1 to mold the case 1 with a resin.

This resin mold is for improving the environmental resistance such as water resistance and oil resistance of electronic devices as in the conventional case, and since it is directly filled in the case 1, the sensor unit 2, the electronic circuit board
5, the display plate 8 and the like are directly molded as in the conventional case, but the battery 6 is molded through the buffer coat resin 9 coated on the outer periphery thereof.

In that case, the epoxy resin 7 and the buffer coat resin 9 are
The battery 6 is made of epoxy resin 7 because it does not adhere to each other.
And it will be in a shielded state with the non-bonded state.

Therefore, according to the present invention, for example, when it becomes necessary to perform defect analysis, as shown in FIG.
If a part of the epoxy resin 7 on the upper portion of the battery 6 is removed by a cutter, the buffer coat resin 9 coating the outer periphery of the battery 6 is not in direct contact with the epoxy resin 7, so the epoxy resin 7 and the buffer coat resin 9, Alternatively, the buffer coat resin 9 and the battery 6 are easily separated, and the battery 6 can be immediately taken out as shown in FIG.

After that, the epoxy resin 7 can be removed by heating or chemicals with the battery 6 removed, so that the work of taking out other parts can be performed safely and with good workability.

As described above, according to the present invention, since the battery built in the device is coated with the buffer coat resin such as the silicone resin and then molded with the epoxy resin as in the conventional case, the battery is not bonded to the molding resin. Therefore, the environment resistance performance is excellent, and battery removal work can be performed safely and easily at the time of failure analysis.

In addition, since the battery is coated with a silicone resin that has lower flammability than epoxy resin, even if it is incinerated, the time until the explosion can be lengthened and the explosive power can be weakened. The safety of the device can be improved.

Further, since the battery is not directly subjected to a strong stress due to the epoxy resin as in the conventional case, there is an effect that a stable operation of the battery can be secured.

Incidentally, FIG. 4 shows another embodiment of the present invention, in which a buffer coat resin 9 such as a silicone resin is added.
The case where the outer periphery of the battery 6 is not coated but is filled in the periphery of the battery 6 and then molded with the epoxy resin 7 is shown. Even in the case of such a configuration, the same effect as that of the above embodiment is obtained.

[Brief description of drawings]

1 is a sectional view of an electronic device with a built-in battery according to the present invention, FIGS. 2 (a) and 2 (b) are sectional views showing an analysis work of an electronic device with a built-in battery according to the present invention, and FIG. 3 is shown in FIG. FIG. 4 is a front view of the electronic device shown in FIG. 4, FIG. 4 is a sectional view showing another embodiment of the present invention, and FIG. 5 is a sectional view showing a conventional battery-equipped device. 1 ... Case 2 ... Sensor part 5 ... Electronic circuit board 6 ... Battery 7 ... Epoxy resin 8 ... Display plate 9 ... Buffer coat resin

Claims (1)

[Scope of utility model registration request] 1. A sensor unit which responds to an external signal in a case,
In addition to having an electronic circuit board on which various electronic parts are mounted, a backup battery is built-in, and the inside of the case is resin-molded with epoxy resin, the outer periphery of the backup battery is a silicon resin. An electronic device with a built-in battery, wherein the battery is molded with an epoxy resin via the buffer coat resin while being coated with the buffer coat resin.