JP6293555B2 - Receiver - Google Patents

Description

The present invention relates to a receiver device.

  Conventionally, the transmitter / receiver 101 shown in FIG. 9 can receive data such as an integrated value of a flow rate from a water meter by optical communication, convert the received data into a predetermined format, and then transmit the data to a centralized meter reading board through a communication line. is there. Since the transceiver 101 is installed near the water meter, the transceiver 101 may be submerged together with the water meter.

  Therefore, as shown in FIG. 9, the light receiving element 102 for performing optical communication is covered with a waterproof resin 103.

  Conventionally, as the resin covering the light receiving element 102, a transparent resin has been used so that light that can be received by the light receiving element 102 can be transmitted. Therefore, the colored polyolefin-based hot melt material has higher waterproofness than the resin material, but cannot be used because it cannot transmit light.

Accordingly, the present invention is an object to provide a receiver device which solves the problems of the prior art.

In order to solve the above problems, a first aspect of the present invention includes a substrate, a light receiving element provided on the substrate, covering the light receiving element, a window member which light receiving element can receive can pass ,
Forming a space where the substrate side opens inside the window member, and disposing the light receiving element in the space;
Cover the entire outer periphery of the substrate and at least a part of the side surface of the window member with a jacket material,
The jacket material is characterized in that a polyolefin-based hot melt material is integrally formed by hot melt molding on the entire outer periphery of the substrate and at least a part of the side surface of the window member.

According to a second aspect of the present invention, in the first aspect, the filler before Symbol space, is characterized in that the filled so as to cover two or more surfaces of the light receiving element.
A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the window member is projected outward from the surface of the jacket material.

  According to the present invention, a window member capable of transmitting light that can be received by the light receiving element is provided, and a part other than the window member is obtained by hot-molding a polyolefin-based hot melt material on at least a part of the side surface of the window member. Is highly waterproof and can use a colored polyolefin-based hot melt material, and can be more waterproof than the conventional transceiver.

The perspective view of the transceiver which concerns on the Example of this invention. The longitudinal cross-sectional view of FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. BB sectional drawing of FIG. The fragmentary sectional view of the window member part of FIG. Sectional drawing of the state which attached the transmitter / receiver of FIG. 1 to the water meter. The graph which shows the time-dependent change of the outer surface temperature of the battery at the time of hot-melt molding in the present invention. The graph which shows the time-dependent change of the outer surface temperature of a battery at the time of hot-melt molding in the state which does not coat | cover a battery with a coating material. The longitudinal cross-sectional view of the conventional transmitter / receiver.

A mode for carrying out the present invention will be described based on an embodiment shown in the drawings.
[Example 1]
1 to 7 show a first embodiment of the present invention.

  In the first embodiment, the transmitter / receiver of the present invention is provided in the upper part of the water meter 10 as shown in FIG. 6 to receive a signal such as an integrated value of the flow rate transmitted from the water meter 10, and a centralized meter reading (not shown) This is applied to the transmitter / receiver 1 that transmits a signal such as an integrated value of the flow rate to the panel.

  As shown in FIGS. 1 to 3, the transceiver 1 includes a substrate 2 provided with a control unit (not shown) and a battery 3 that supplies power to the control unit via a connection line 3a. The battery 3 may be any chemical battery that can supply power to the substrate 2, such as a dry battery such as manganese, alkali manganese, or oxyride, a lithium battery, a mercury battery, a silver oxide battery, a lithium ion secondary battery, or a nickel cadmium storage battery. Can be used. Further, the shape of the battery 3 can be an arbitrary shape such as a cylindrical shape, a button shape, or a rectangular shape. In Example 1, a cylindrical lithium battery was used.

  A communication cable 4 and a light receiving element 5 are connected to the substrate 2, and the control unit can transmit signals to the centralized meter reading board through the communication cable 4. Further, as shown in FIG. 6, the control unit can receive a signal from the water meter 10 by the light receiving element 5 provided so as to face the LED for optical communication which is the light emitting element 10 a provided in the water meter 10. It can be done. The communication cable 4 is covered with a resin such as vinyl chloride.

  As shown in FIGS. 2 and 3, the entire outer periphery of the battery 3, the outside of the connection line 3a connected to both electrodes on the surface where both electrodes of the battery 3 are provided, and one connection line 3a. A covering material 6 is provided on the outside of the part, and the battery 3 is covered with the covering material 6. The covering material 6 can reduce the temperature applied to the battery 3 and the force applied to the battery 3 during hot melt molding described later. In Example 1, a fluororesin sheet (Nichias model # 4140) having a thickness of 2 to 3 mm was used as the covering material 6.

  As shown in FIG. 4, the side of the communication cable 4 on the side of the substrate 2 passes through an insertion hole 11 a of the insertion member 11 made of resin.

  As shown in FIG. 4, the insertion member 11 includes a small-diameter portion 12 formed on the substrate 2 side and a large-diameter portion formed on the opposite side of the small-diameter portion 12 from the substrate 2 to an outer diameter larger than the outer diameter of the small-diameter portion 12. 13 and an enlarged-diameter portion 14 provided between the small-diameter portion 12 and the large-diameter portion 13. A cylindrical small-diameter hole 12a that is open at both ends is formed at the center of the small-diameter portion 12, and both ends are open at the center of the large-diameter portion 13, and the inner diameter is larger than the inner diameter of the small-diameter hole 12a. A cylindrical large-diameter hole 13a is formed, and a part of the enlarged-diameter portion 14 is located between the small-diameter hole 12a and the large-diameter hole 13a. The small-diameter hole 12a and the large-diameter hole 13a communicate with each other, and the small-diameter hole 12a, the large-diameter hole 13a, and a part of the enlarged-diameter portion 14 constitute an insertion hole 11a.

  A groove 16 is provided at the intersection of the extended portion of the inner surface of the enlarged diameter portion 14 and the extended portion of the inner surface of the small diameter hole 12a so that the inner surface side of the enlarged diameter portion 14 and the inner surface side of the small diameter hole 12a are opened. An O-ring which is a seal member 17 is press-fitted between the outer periphery of 4 and the groove portion 16 to prevent water from entering the inside of the seal member 17 from the outside.

  A female screw 13b is formed on the inner peripheral surface of the large-diameter hole 13a, and a male screw 18a provided on the outer peripheral surface of the retaining member 18 is screwed into the female screw 13b. Movement in the direction is suppressed.

  As shown in FIG. 5, a window member 19 is provided so as to cover the light receiving element 5 and the substrate 2 around the light receiving element 5. The window member 19 is formed of a material that can transmit light that can be received by the light receiving element 5, and a space 19 a that is open only on the substrate 2 side is formed inside the window member 19, so that the light receiving element 5 is located in the space 19 a. It has become. The window member 19 can be made of polypropylene, polycarbonate, acrylic resin or the like as long as the light that can be received by the light receiving element 5 can be transmitted. In this embodiment, a polyolefin-based hot melt material described later, norbornene and ethylene having good adhesion are used. Was a cyclic olefin copolymer (COC) copolymerized with a metallocene catalyst. The light transmittance of this COC is 91%.

  The space 19a of the window member 19 is filled with the filler 20, and air in the space 19a is removed as much as possible. Thereby, it is suppressed that a water | moisture content permeate | transmits the window member 19 with air. Any filler can be used as long as it can transmit light that can be received by the light receiving element 5. However, an adhesive that can bond the window member 19 to the substrate 2 and can transmit light that can be received by the light receiving element 5 can be used. When used, it is preferable that the window member 19 can be fixed at a predetermined position during manufacture. In this example, Cemedine Super X Gold or ThreeBond 3Bond 1757 was used.

  The window member 19 has two hook-like protrusions 19c that protrude outward from the main body portion 19b in parallel with the substrate 2 over the entire circumference of the side surface of the main body portion 19. The contact area between the member 19 and the jacket material 22 described later is increased. Further, a primer may be applied to a portion between the window member 19 and the jacket material 22.

  The outer periphery of the substrate 2 and the covering material 6, the outer periphery of the inner end portion of the insertion member 11, at least a part of the side surface of the main body 19 b of the window member 19, and the projection 19 c are molded by resin injection molding. The material 22 is integrally formed, and preferably, the jacket material 22 is integrally formed by hot-melt molding of the hot-melt material. Note that the end surface (upper surface portion in the figure) of the light receiving element 5 opposite to the substrate 2 is not covered with the jacket material 22. Any resin (hot melt material) can be used as the resin constituting the outer cover material 22 as long as it does not easily undergo hydrolysis after curing, has a low water absorption, and has a high electrical resistivity. In the example, a polyolefin-based hot melt material (Toagosei Co., Ltd. AS972) was used.

Next, a method for forming the jacket material 22 will be described.
After installing the substrate 2 to which the battery 3, the light receiving element 5, the window member 19, the communication cable 4, the insertion member 11 and the like are installed at a predetermined position of the lower mold, the upper mold is fixed to the lower mold with a predetermined It moves to the position, and the hot melt material is injected into the upper and lower molds at a predetermined pressure and temperature to integrally form the outer cover material 22. Thereafter, after maintaining a predetermined pressure for a predetermined time, the upper mold is moved to take out the molded product, and after natural drying, the transceiver 1 is obtained.

  The insertion member 11 uses any resin as long as it is a resin having good adhesion to the hot melt material constituting the jacket material 22, so that water from the insertion member 11 and the jacket material 22 to the inside can be used. Can be prevented. In this example, a polyolefin hot melt material and polypropylene having good adhesion were used.

  Moreover, since the sealing member 17 is press-fitted between the inner peripheral surface of the insertion hole 11a and the outer peripheral surface of the communication cable 4 in the insertion member 11, it is possible to prevent water from entering through the insertion hole 11a.

  In addition, by using a polyolefin-based hot melt material that hardly undergoes hydrolysis after curing, has a low water absorption rate, and a high electrical resistivity, it is possible to prevent moisture from entering the inside through the jacket material 22.

  Further, the window member 19 is made of a cyclic olefin copolymer (COC) having good adhesiveness with a polyolefin-based hot melt material, and the projection 19c is provided on the window member 19 to increase the area of the side surface of the window member 19. By doing so, it can suppress that water permeates through between the window member 19 and the outer covering material 22. Further, when a cross primer is applied to a portion between the window member 19 and the jacket material 22, waterproofness can be further improved.

Thus, the transceiver 1 of the present invention can ensure a predetermined waterproof property.
Further, the waterproofing around the communication cable 4 is performed by the seal member 17 press-fitted between the communication cable 4 and the inner peripheral surface of the insertion hole 11a, and is not affected by the material of the covering material of the communication cable 4. Any communication cable 4 can be used.

  Usually, when the heat | fever exceeding 100 degreeC is added to the battery 3, there exists a possibility that the performance of a battery may be adversely affected. Directly with respect to the outer peripheral surface of the battery 3, a polyolefin-based hot melt material is subjected to hot melt molding under the conditions of an injection temperature of 220 ° C., a mold temperature of 60 ° C., an injection / holding pressure of 3 MPa, and an injection / holding time of 60 s. FIG. 8 shows a graph showing the temperature course measured at four locations on the outer peripheral surface of the battery 3 during hot melt molding. As can be seen from FIG. 8, if the battery 3 is not covered with the covering material 6, the battery 3 exceeds 100 degrees, and the performance of the battery 3 may be adversely affected.

  FIG. 7 is a graph of an embodiment of the present invention, in which the entire outer periphery of the battery 3 is covered with a fluororesin sheet (Nichias model # 4140) as the covering material 6 and the temperature course when hot-melt molding is performed under the same conditions. It is the graph which showed. As can be seen from FIG. 7, the heat transmitted to the battery 3 can be reduced to 100 ° C. or lower. When the battery 3 was taken out and the internal resistance of the battery before and after hot melt molding was measured, it was 3.45Ω before molding and 3.55Ω after molding, and no abnormality was observed.

  As described above, since the jacket material 22 can be integrally formed by hot melt molding, the manufacturing time can be greatly reduced and the manufacturing cost can be reduced as compared with the transmitter / receiver of the prior art.

  Further, when a material having a large restoring force is used as the covering material 6, the covering material 6 contracts when hot-melt molding is performed, and the covering material 22 may crack when the covering material 6 is subsequently restored. Therefore, as the covering material 6, it is preferable to use a covering material having a small restoring force after hot melt molding and a small force applied to the jacket material 22. Although an acceleration test was performed using a fluororesin sheet (Nichias model # 4140) as the covering material 6, no cracks or the like were observed in the jacket material 22 even after a time corresponding to 20 years had elapsed.

  In addition, the protrusion 19c provided in the main body 19b of the window member 19 is not limited to the illustrated shape and number depending on the waterproof property required for the transceiver, and can be arbitrarily set. Further, without providing the protrusion 19c, a groove may be provided on the side surface of the main body portion 19b to increase the area of the side surface of the main body portion 19b.

  Moreover, in the said Example, although the outer covering material 22 was provided in the outer periphery of the inner side part of the insertion member 11, you may make it provide the outer covering material 22 in the whole outer periphery of the insertion member 11. FIG.

[Example 2]
In the first embodiment, the light receiving element 5 is provided in the space 19a of the window member 19. However, a light emitting element capable of emitting light that can be received by the corresponding light receiving element is provided. You may make it receive a signal from a meter and to transmit a signal to another apparatus from a light emitting element.

Since other structures are the same as those of the first embodiment, the description thereof is omitted.
Also in the second embodiment, the same actions and effects as those of the first embodiment can be exhibited.

[Other Examples]
In the first embodiment, the transmitter / receiver of the present invention is applied to the one that receives the signal from the water meter and transmits the signal to the centralized meter reading board, but as the device that receives the signal, besides the water meter, A signal can be received from an arbitrary measuring device such as a gas meter or a water level meter, and the signal may be transmitted to an arbitrary device other than the centralized meter reading board. Further, a signal may be received from another device and transmitted to the measuring device.

DESCRIPTION OF SYMBOLS 1 Transmitter / receiver 2 Board | substrate 5 Light receiving element 19 Window member 19c Protrusion 20 Filler 22 Cover material

Claims (3)

Comprising: a substrate, a light receiving element provided on the substrate, covering the light receiving element, a window member which light receiving element can receive can pass,
Forming a space where the substrate side opens inside the window member, and disposing the light receiving element in the space;
Cover the entire outer periphery of the substrate and at least a part of the side surface of the window member with a jacket material,
Outer covering material is a hot melt material of the polyolefin, at least a portion of the side surface of the outer peripheral whole and the window member of the substrate, receiver unit, characterized in that are integrally formed by hot melt molding. A filler before Symbol space, receiver of Claim 1, wherein the filled so as to cover two or more surfaces of the light receiving element. The receiver according to claim 1, wherein the window member is projected outward from the surface of the jacket material.