JP2015207146A - Waterproof apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof apparatus 1 allowing waterproofness with a simple configuration, without inhibiting gas emission from a gas emission valve of a battery 20.SOLUTION: The waterproof apparatus 1 comprises: a substrate 4 and a battery 20 supplying power to the substrate 4 included in the same housing; a gas emission valve for exhausting a gas retained when an internal pressure of the battery 20 increases, included in either one of electrodes of the battery 20. Components in the housing other than the battery 20 are covered with filler.

Description

  The present invention relates to a waterproof device that prevents water from entering inside.

  For example, a waterproof sensor has been proposed as a waterproof device. Patent Literature 1 discloses a waterproof device that prevents a setting member from falling from a casing by supporting a setting member that sets an accommodated electric circuit by a string member. In this prior art, two lithium ion batteries are housed inside a casing, and an electric circuit is driven by a power source supplied from these two batteries.

JP 2011-118802 A

  Generally, in order to provide an electrical device with waterproofness, an electronic component of the electrical device is covered with a filler made of resin.

  Further, in order to prevent the internal pressure of the lithium ion battery from rising due to abnormal heat generation, overcharging, or the like, the lithium ion battery is provided with a gas discharge valve that discharges internal gas when the internal pressure increases. For this reason, the entire lithium ion battery cannot be covered with a filler, and it has not been possible to provide a waterproof property to an electric device including the lithium ion battery using the filler.

Therefore, in the prior art document 1, the circuit components and the battery are accommodated in a sealed space formed by combining two covers, and a waterproof property is enhanced by providing a seal ring between the two covers.
However, if a sealed space is formed by two covers and a seal ring is provided between the covers, there is a problem that the number of parts increases and the structure becomes complicated.

  The present invention has been made against the background of the above problems, and has a lithium ion battery, and by covering an electronic component with a filler, a waterproof device with a simple structure and waterproofness is provided. The purpose is to provide.

  The present invention includes a substrate and a battery that supplies power to the substrate in the same housing, and a gas discharge valve that discharges a gas accumulated when the internal pressure of the battery increases is provided in any electrode of the battery. In the waterproof device, the inside of the casing is covered with a filler except for the battery.

  Since the waterproof device of the present invention covers other than the battery with the filler, the waterproof property of the device can be provided with a simple configuration without hindering the exhaust gas from the gas discharge valve of the battery.

It is a front view which shows the waterproof type apparatus 1 which concerns on embodiment. It is an AA line sectional view showing waterproof type device 1 concerning an embodiment. It is a rear view which shows the inside of the waterproof type apparatus 1 which concerns on embodiment. It is BB sectional drawing which shows the battery part of the waterproof type apparatus 1 which concerns on embodiment. It is an AA line sectional view at the time of filling the waterproofing type equipment 1 concerning an embodiment with a filler. It is a rear view which shows the inside in the case where the waterproof type apparatus 1 which concerns on embodiment is filled with the filler. It is BB sectional drawing which shows a battery part at the time of filling the waterproofing apparatus 1 which concerns on embodiment with a filler.

  Hereinafter, embodiments of a waterproof device according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one. Further, in the following description, “upper / lower” refers to a direction in which the waterproof sensor 1 is installed on the ceiling surface. That is, in FIG. 2, the upper side of the figure is the upper side, and the lower side of FIG. 2 is the lower side.

  FIG. 1 is a front view showing a waterproof device 1 according to an embodiment. 2 is a cross-sectional view taken along line AA in FIG. FIG. 3 is a rear view showing the inside of the waterproof device 1 according to the embodiment. 4 is a cross-sectional view taken along line BB in FIG. The waterproof device 1 will be described with reference to FIGS.

  As shown in FIGS. 2 and 3, the waterproof device 1 includes a base (not shown) and a main body 10 attached to the base. In the casing of the main body 10, a substrate 4, an antenna 5, and a water draining portion 7 are provided. A battery 20 and the like are provided.

  The main body 10 has an outer frame formed of a main body cover 11, and has a through hole 12 in the center of the bottom surface of the main body cover 11, and the thermal element 3 is inserted into the through hole 12. A protector 2 is provided on the outer surface of the bottom surface of the main body cover 11 to protect the thermal element 3 exposed to the outside.

  On the inner wall of the bottom surface of the main body cover 11, there is a substrate mounting portion 14 made of a protrusion extending upward, and the substrate 4 is mounted on the substrate mounting portion 14 and fixed by thermal welding or the like. In addition, a battery placement portion 16 (see FIG. 4) formed of a ridge portion extending upward is formed on the bottom inner wall of the main body cover 11, and the battery 20 is provided on the battery placement portion 16.

  The main body cover 11 is provided with a drainage portion 7 so as to be in contact with the side wall. The drainage part 7 is surrounded by the wall 7b and the side surface of the main body 10, and has a drainage hole 7a in the enclosed part. The height of the wall 7b is lower than the height of the battery 20 in the installed state and higher than the other electronic components. The other electronic components include the substrate 4 and the antenna 5, in other words, electronic components that are filled with a filler that will be described later.

  As described above, the substrate 4 is accommodated in the main body 10, is connected to the battery 20 via the battery connector, and is supplied with power from the battery 20. The substrate 4 has a rectangular shape, for example, and is provided with a plurality of reed switches (not shown) for performing various settings of the waterproof device 1. These reed switches are used, for example, to activate the waterproof device 1. In addition, it is used to test whether the waterproof device 1 operates normally. Further, when the waterproof device 1 is used as a slave unit, it is used for registration to the master unit.

  The substrate 4 is connected to the antenna 5, and the antenna 5 transmits a transmission signal transmitted from the substrate 4 to the base unit or the like, and receives signals transmitted from other devices or the like toward the substrate 4. A signal is received. The antenna 5 is made of a metal wire extending in a circumferential shape, and is disposed along the outer periphery of the bottom inner wall of the main body cover 11. A thermal element 3 that detects a fire, for example, a thermistor, is provided at the center of the substrate 4, and this thermistor detects the temperature. The heat sensitive element 3 has a rod shape and is inserted into a through hole 12 provided at the center of the main body cover 11, and the tip of the heat sensitive element 3 is exposed from the main body cover 11.

  When a fire or the like occurs, if the temperature detected by the thermal element 3 exceeds a threshold value due to the heat, the substrate 4 transmits a signal to the outside of the master unit or the like via the antenna 5. Thereby, the main | base station etc. which manage the place where the waterproof apparatus 1 was installed can grasp | ascertain generation | occurrence | production of a fire etc. Thus, in embodiment which concerns on this invention, although the waterproof type apparatus 1 demonstrated as an example using it as a fixed temperature type spot-type heat sensor, the waterproof type apparatus 1 is not limited to a heat sensor, For example, a flame detector that detects a flame with infrared rays or the like may be used.

  As shown in FIGS. 1 and 2, the protector 2 is attached to the lower surface of the main body cover 11. The protector 2 protects the thermal element 3 exposed from the main body cover 11. The protector 2 has a substantially conical shape, and the upper surface thereof is attached in contact with the lower surface of the main body cover 11. A part of the side surface of the protector 2 is a protector opening, and when a fire or the like occurs, a hot air current passes through the protector opening and reaches the thermistor.

  As shown in FIGS. 2 and 4, the battery 20 is provided such that, in the installed state, the long side is along the vertical line from the ceiling surface, that is, stands. More specifically, when the waterproof device 1 is installed on the ceiling surface, the battery 20 is provided so that the positive electrode 20a side faces downward and the negative electrode 20b side faces upward. At this time, the long side of the battery 20 is orthogonal to the substrate 4. Moreover, in the installation state of each component, the position of the upper end of the battery 20 is substantially the same as or slightly lower than the height of the peripheral wall of the main body cover 11, and the mounting position of other electronic components (board 4 and antenna 5) Higher. Further, the battery 20 is a lithium ion battery, and on the negative electrode 20b side, when the internal pressure of the battery 20 is increased due to the accumulation of gas inside the battery 20 due to abnormality, the gas discharge for discharging the gas accumulated in the battery 20 A valve is provided. As shown in FIG. 4, the battery 20 is provided with a battery cover 22 made of a thin resin that is insoluble in water so as to cover the outer peripheral surface. More specifically, the battery cover 22 has a bottomed cylindrical shape and is provided so as to cover the battery 20 and the battery mounting portion 16. As a result, even if water flows into the waterproof device 1, the battery 20 is not splashed with water, and the waterproof property can be improved.

Next, the waterproof device 1 when the main body cover 11 is filled with a filler will be described with reference to FIGS. 5 to 7 in order to provide the waterproof device 1 according to the present embodiment with waterproofness.
FIG. 5 is a cross-sectional view taken along the line AA when the waterproof device 1 according to the embodiment is filled with a filler. FIG. 6 is a rear view showing the inside when the waterproof device 1 according to the embodiment is filled with a filler. FIG. 7 is a cross-sectional view taken along the line B-B showing the battery portion when the waterproof device 1 according to the embodiment is filled with a filler.

  As the filler to be filled in the main body cover 11 of the waterproof device 1, for example, a resin such as an ultraviolet curable resin is selected and filled so as to cover the electronic components in the main body cover 11. Can be waterproof.

  The height of the filling portion 30 (hatched portion in FIG. 5) in which the filler is filled from the inner bottom portion of the main body cover 11 is lower than the position of the upper end (negative electrode 20b) of the battery 20, and the filler discharges gas. The negative electrode 20b provided with the valve is not covered, and other electronic components (the substrate 4 and the antenna 5) are completely covered. That is, when the electronic component is installed in the waterproof device 1, the height of the filling portion 30 is lower than the position of the upper end (negative electrode 20b) of the battery 20 and higher than the mounting position of the electronic components other than the battery. .

  Moreover, the height of the filling part 30 is set lower than the height of the wall body 7b of the drainage part 7, and the inside of the wall body 7b is not filled with a filler. That is, the outside of the wall 7b of the drainage portion 7 is a filling portion 30, and if water flows into the waterproof device 1, a certain amount is stored on the filling portion 30, but the certain amount is reduced. When the excess water flows in, the inflowing water passes over the wall body 7b of the drainage portion 7 and flows out of the waterproof device 1 through the drainage hole 7a.

  The bottomed cylindrical battery cover 22 is provided such that the bottom surface 22b is in contact with the negative electrode 20b of the battery 20, and the opening 22a (the lower end in the installed state of the waterproof device 1) is in contact with the bottom surface of the main body cover 11. . The opening 22 a of the battery cover 22 is located inside the filling unit 30. Thereby, the battery cover 22 completely seals the battery 20, and even if water flows into the main body cover 11, the battery 20 does not come into contact with water.

  Moreover, although it demonstrated that the height of the filling part 30 was lower than the upper end of the battery 20, it needs to be made lower than the position of the gas exhaust valve provided in the negative electrode 20b of the battery 20 which is a lithium ion battery in more detail. There is. That is, when the battery 20 made of a lithium ion battery accumulates gas inside the battery 20 due to an abnormality, the internal pressure increases, and when the gas is discharged from the gas discharge valve on the negative electrode 20b side, the battery cover 22 is made of a thin resin. This is because the battery cover 22 is destroyed by the pressure of the discharged gas, and the battery 20 can discharge the gas to the outside of the battery cover 22. As described above, the battery cover 22 prevents water from coming into contact with the battery 20 to enhance waterproofness, and also ensures safety by discharging gas when the battery 20 is abnormal. ing.

  In the above description, the battery cover 22 of the water discharge type device 1 according to the present embodiment has been described as covering the battery mounting portion 16 and the entire battery 20, but the battery cover 22 covers the negative electrode 20b side, The lower end only needs to be inside the filling portion 30, and the battery cover 22 does not necessarily need to cover the battery placement portion 16.

  In the above description, the battery cover 22 is made of a thin resin. However, the battery cover 22 may be made of an elastic thin rubber or the like. In this case, when the gas is discharged from the gas discharge valve due to an abnormality in the battery 20, the rubber battery cover is expanded by the amount of the discharged gas, so that the abnormal pressure increase in the battery 20 can be reduced.

  In the description of the present embodiment, the gas discharge valve is described as being provided on the negative electrode 20b side, but the gas discharge valve may be provided on either electrode, and the gas discharge valve is provided on the positive electrode 20a side. It goes without saying that the present invention can also be applied to the battery provided. When the gas discharge valve is provided on the positive electrode 20a side, it is necessary to install the waterproof device 1 with the positive electrode 20a side facing upward so that the positive electrode 20a is positioned higher than the height of the filling portion 30. is there.

  That is, the present invention includes the substrate 4 and the battery 20 that supplies power to the substrate 4 in the same housing (main body cover 11), and discharges accumulated gas when the internal pressure of the battery 20 increases. In a waterproof device having a gas discharge valve on one of the electrodes of the battery 20, the inside of the housing (main body cover 11) is covered with a filler other than the battery 20.

  Further, according to the present invention, in the waterproof device 1 provided on the ceiling surface, the battery 20 is provided such that, in the installation state of the waterproof device 1, the electrode on which the gas discharge valve is provided is positioned above, and the other electrode The filler is filled in the housing to a height that does not cover the electrode on which the gas discharge valve is provided.

  Further, the present invention is characterized in that a waterproof battery cover 22 is provided on an electrode provided with a gas discharge valve.

  DESCRIPTION OF SYMBOLS 1 Waterproof type device, 2 Protector, 3 Thermal element, 4 Substrate, 5 Antenna, 7 Drain part, 7a Drain hole, 7b Wall body, 10 Main body, 11 Main body cover, 12 Through hole, 14 Substrate mounting part, 16 Battery mounting part, 20 battery, 20a positive electrode, 20b negative electrode, 22 battery cover, 22a opening part, 22b bottom face, 30 filling part.

Claims (3)

A waterproof type comprising a substrate and a battery for supplying power to the substrate in the same housing, and having a gas discharge valve for discharging a gas accumulated when the internal pressure of the battery increases in any electrode of the battery In the equipment
A waterproof device, wherein the casing is covered with a filler other than the battery. The waterproof device according to claim 1, wherein the waterproof device is provided on a ceiling surface.
In the installed state of the waterproof device, the battery is provided such that the electrode provided with the gas discharge valve is located above, and the other electrode is located below,
The waterproof type device is characterized in that the filler is filled in the casing to a height that does not cover an electrode provided with the gas discharge valve.   The waterproof device according to claim 2, wherein the electrode provided with the gas discharge valve is provided with a waterproof battery cover.

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