JP2022066600A - Method for mounting sealing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for mounting a sealing structure, capable of improving mountability of a sealing structure.

SOLUTION: A method for mounting a sealing structure comprises: a first step of installing a holder part 92 so as to substantially surround a target space part 90 on the outer peripheral side of a target surface region, the holder part installed at a position corresponding to the target space part 90 that is an upper space of the target surface region, which is a surface region of a substrate 70 on which a target component is mounted; a second step of forming, after the first step, a sealing part 91 in the target space part 90 by filling the inside of the target space part 90 with a liquid ultraviolet curable resin and curing the inside of the holder part 92; and a third step of installing, after the second step, a shield case part 93 so as to cover at least a part of the target space part 90 sealed by the sealing part 91, the shield case part configured to block external noise from the target component sealed by the sealing part 91.

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2022,JPO&INPIT

Description

The present invention relates to a method of attaching a sealing structure.

Conventionally, for fire detectors installed in places where there is a risk of being filled with flammable gas, technology for preventing a fire from occurring due to contact between the flammable gas and the electrical components of the fire detector. As one of the (so-called explosion-proof technology), it is a housing for storing various parts, and has a cover part for storing a board on which electronic parts are mounted and a base part for storing an external lead terminal. It is a partition member provided between the body and the cover portion and the base portion inside the housing, and the internal space of the housing is a board storage chamber for storing the board and a terminal storage for storing the external lead terminal. A technique including a partition member for forming the room separately from the room has been proposed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 11-167686

However, in the above-mentioned conventional technique, since the substrate storage chamber is only surrounded by the base portion and the partition member, for example, the flammable gas enters the substrate through the gap between the base portion and the partition member. When the gas flows into the storage chamber, the inflowing combustible gas may come into contact with the electronic components mounted on the substrate, resulting in a fire. Therefore, there was room for improvement from the viewpoint of improving the explosion-proof property.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a sealing structure and a fire detection device capable of improving explosion-proof properties.

In order to solve the above-mentioned problems and achieve the object, the method for mounting the sealing structure according to claim 1 is a method for mounting the sealing structure for sealing the parts mounted on the substrate. At a position corresponding to the target space portion, which is the upper space of the target surface region, which is the surface region of the substrate on which the target component to be sealed is mounted, and which is the space in which the target component is housed. The damming means to be installed, and for damming the sealing means so as not to flow out to the outside of the target space when the sealing means for sealing the target component is formed, is described above. After the first step of installing the target space portion on the outer peripheral side of the target surface region so as to substantially surround the target space portion and the inside of the damming means that substantially surrounds the target space portion, the target space portion. A second step of forming the sealing means in the target space by filling the inside of the space with a liquid ultraviolet curable resin and curing the resin, and after the second step, the sealing means is sealed by the sealing means. A third step of installing a blocking means for blocking external noise from the target component so as to cover at least a part of the target space sealed by the sealing means. including.

According to the mounting method of the sealed structure according to claim 1, the sealed structure can be mounted relatively easily and quickly, and the mountability of the sealed structure can be improved.

It is a side view which shows the installation state of the fire detection apparatus which concerns on embodiment. It is a figure which shows the fire detection apparatus in the state which the mounting base is removed (partially not shown), (a) plan view, (b) is the bottom view. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 2 with the outer cover removed, which will be described later (partially not shown). It is a figure which shows the upper surface side of a substrate, (a) is a perspective view, and (b) is an exploded perspective view. It is an enlarged view of the neighborhood area of the fixed part of FIG. 4A.

Hereinafter, the sealing structure according to the present invention and the embodiment of the fire detection device will be described in detail with reference to the drawings. First, [I] the basic concept of the embodiment will be described, then [II] the specific contents of the embodiment will be described, and finally, [III] a modification to the embodiment will be described. However, the present invention is not limited to the embodiments.

[I] Basic concept of the embodiment First, the basic concept of the embodiment will be described. Embodiments typically relate to a sealing structure for sealing components mounted on a substrate, and a fire detection device.

Here, "sealing" means covering the parts mounted on the substrate with a sealing portion described later. Further, the "fire detection device" means a device for detecting and notifying a fire in a monitoring area, and is a concept including, for example, a smoke type, a thermal type, or a gas type fire detector, a fire alarm, and the like. Is. Of these, the "monitoring area" is an area to be monitored, and is a concept including, for example, an area inside a building. Further, the "building" is a concept including, for example, a storage facility for storing chemicals and the like, a factory facility, and the like, although the specific structure and type thereof are arbitrary. Further, "notifying" is a concept including, for example, outputting predetermined information to an external device, displaying or outputting predetermined information via an output means (display means or voice output means), and the like. be.

[II] Specific contents of the embodiment Next, the specific contents of the embodiment will be described.

(Constitution)
First, the configuration of the fire detection device according to the embodiment will be described. FIG. 1 is a side view showing a mounting state of a fire detection device according to an embodiment. FIG. 2 is a diagram showing a fire detection device in a state where the mounting base described later is removed (partially not shown), (a) a plan view, and (b) a bottom view. FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2 with the outer cover removed, which will be described later (partially not shown). In the following description, the X direction in FIG. 1 is the left-right direction of the fire detection device (+ X direction is the left direction of the fire detection device, -X direction is the right direction of the fire detection device), and the Y direction in FIG. 2 is the fire detection device. The front-back direction (+ Y direction is the front direction of the fire detection device, -Y direction is the rear direction of the fire detection device), the Z direction in FIG. 1 is the vertical direction of the fire detection device (+ Z direction is the upward direction of the fire detection device, -Z). The direction is called the downward direction of the fire detector).

The fire detection device 1 is a device that detects and notifies a substance to be detected (for example, smoke) contained in a gas. This fire detection device 1 is installed on the installation surface 2 on the lower surface of the ceiling of the building inside the building, and as shown in FIGS. 1 to 3, the mounting base 10, the outer cover 20, and the detection unit cover ( It is provided with an insect screen 40, a detection unit main body 50, a terminal board 60, and a substrate 70 (not shown).

(Configuration-Mounting base)
The mounting base 10 is a mounting means for mounting the outer cover 20 on the mounting surface 2. The mounting base 10 is configured by using, for example, a known mounting base for a fire detection device (for example, a substantially plate-shaped mounting base made of resin), and is configured by using a fixing tool or the like with respect to the mounting surface 2. It is fixed.

(Composition-Outer cover)
The outer cover 20 is a cover that covers the detection unit cover, the insect screen 40, the detection unit main body 50, the terminal board 60, and the substrate 70. The outer cover 20 is configured by using, for example, an outer cover for a known fire detection device (for example, a substantially hollow bowl-shaped outer cover formed of a resin material having a light-shielding property), and the outer cover 20 is configured. The upper end portion of the mounting base 10 is arranged so as to be in contact with the lower surface of the mounting base 10, and is fixed to the mounting base 10 by a fitting structure (or a fixture) or the like. Further, as shown in FIGS. 1 and 2, a plurality of inflow / outflow openings 21 for allowing a gas containing a substance to be detected to flow in / out into a detection space described later are provided in a lower portion of the outer cover 20.

(Configuration-Detector cover)
The detection unit cover is a partitioning means for partitioning the detection space (not shown) and an incident suppression means for suppressing incident light from being incident on the detection space. Here, the "detection space" is a space for detecting a substance to be detected (not shown). This detection part cover is configured by using, for example, a detection part cover for a known fire detection device (for example, a detection part cover made of a resin material having a light-shielding property), and is configured as a base part and a labyrinth part. (Neither is shown). Of these, the base portion is formed of a disk-shaped body having an outer diameter smaller than the outer diameter of the outer cover 20, and is provided so as to cover the lower surface of the detection space. Further, the labyrinth portion is configured by combining a plurality of side pieces, is erected with respect to the upper surface of the base portion, and is provided so as to surround the outer periphery of the detection space (more specifically, the labyrinth portion). (Provided with a gap between adjacent side pieces), connected to the base.

(Composition-insect repellent net)
The insect net 40 is a net for preventing insects outside the outer cover 20 from invading the detection space. The insect repellent net 40 is configured by using, for example, a known insect repellent net for a fire detection device (for example, an annular insect repellent net), and covers the outer periphery of the detection portion cover (specifically, the labyrinth portion). It is provided so as to surround it, and is fixed to the detection unit cover by a fitting structure or the like.

(Configuration-Detector body)
The detection unit main body 50 is an attachment means for attaching the detection unit cover, and is an incident suppression means for suppressing incident light from being incident on the detection space. The detection unit main body 50 is, for example, a detection unit main body for a known fire detection device (for example, a substantially hollow columnar detection unit main body having an open upper surface, and detection formed of a resin material having a light-shielding property. The outer diameter of the detection unit main body 50 is set to be larger than the outer diameter of the detection unit cover. Further, as shown in FIG. 3, the detection unit main body 50 is provided so as to cover the upper surface of the detection space, and is connected to the detection unit cover by a fitting structure or the like.

Further, as shown in FIG. 3, the detection unit main body 50 has a first fixed portion 51, a second fixed portion (not shown), a third fixed portion (not shown), a first optical path hole 53, and a second. An optical path hole (not shown) is provided. Of these, the first fixing portion 51 is a first fixing means for fixing the light emitting portion 82a described later, and as shown in FIG. 3, the portion of the detection unit main body 50 corresponding to the light emitting portion 82a described later is used. Have been placed. Further, the second fixing portion is a second fixing means for fixing the light receiving portion described later, and is arranged in a portion of the detection unit main body 50 corresponding to the light receiving portion described later. Further, the third fixing unit is a third fixing means for fixing the display unit described later, and is arranged in a portion of the detection unit main body 50 corresponding to the display unit described later. Further, the first optical path hole 53 is a through hole for forming an optical path between the light emitting portion 82a described later and the detection space in the substrate 70, and as shown in FIG. 3, the detection unit main body 50 will be described later. It is formed in a portion corresponding to the light emitting portion 82a. Further, the second optical path hole is a through hole for forming an optical path between the light receiving portion described later and the detection space in the substrate 70, and is a portion of the detection unit main body 50 corresponding to each of the light receiving portions described later. It is formed. In the embodiment, the detected light emitted from the light emitting unit 82a described later is not directly received by the light receiving unit described later, but the irradiated detection light is indirectly transmitted to the light receiving unit via the detection unit cover. The shapes and installation positions of the detection unit cover and the detection unit main body 50 are set so that the light can be received.

(Configuration-Terminal board)
Returning to FIG. 2, the terminal board 60 is a housing means for housing the detection unit main body 50 and the substrate 70. The terminal board 60 is configured by using, for example, a known terminal board for a fire detection device (for example, a substantially hollow cylindrical terminal board having an open lower surface and a terminal board made of a resin material) or the like. Specifically, the outer diameter of the terminal board 60 is set to be larger than the outer diameter of the detection unit main body 50 and the outer diameter of the substrate 70. Further, as shown in FIGS. 2 and 3, the terminal board 60 is provided so as to cover the detection unit main body 50 and the substrate 70 from above. Specifically, it is connected to the detection unit main body 50 by a fixing tool or the like via a first mounting hole 61a formed in the mounting member 61, and is connected to the outer cover 20 by a fitting structure or the like. It is connected to the mounting base 10 by a fixing tool or the like via a second mounting hole 61b formed in the mounting member. A machine name plate 62 is attached to the upper surface of the terminal board 60.

(Structure-board)
FIG. 4 is a view showing the upper surface side of the substrate 70, (a) is a perspective view, and (b) is an exploded perspective view. FIG. 5 is an enlarged view of a region near the fixed portion 94 described later in FIG. 4A. The board 70 is a mounting means on which various components 80 are mounted.

Here, the "component 80" means an electronic component constituting the fire detection device 1, and in the embodiment, the electronic component 81 (for example, a microcomputer, a Zena diode, an electrolytic capacitor) having a distance between terminals of less than a predetermined distance is used. A capacitor or the like is applicable. Hereinafter, it is referred to as "first component 81") or an electronic component 82 in which the distance between terminals is a predetermined distance or more (for example, a light emitting unit 82a described later, a light receiving unit described later, and a display described later). This is a concept including a part, a capacitor having a relatively large size, etc., hereinafter referred to as “second component 82”) and the like. Further, the "distance between terminals" means the distance between the positive terminal and the negative terminal of the component 80. Further, the predetermined distance corresponds to, for example, a distance such that no current leaks between the positive terminal and the negative terminal of the component 80. As an example, when the component 80 is not coated, the thickness is about 1.5 mm, and when the component 80 is coated, the thickness is about 0.5 mm.

Further, this substrate 70 is configured by using, for example, a known flat plate-shaped circuit board or the like, and as shown in FIG. 3, inside the terminal board 60, there is a gap between the upper end portion and the lower end portion of the terminal board 60. They are arranged almost horizontally apart from each other.

Further, a light emitting unit 82a, a light receiving unit (not shown), and a display unit (not shown), which are second components 82, are mounted on the lower surface of the substrate 70. Further, as shown in FIG. 4B, on the upper surface of the substrate 70, a plurality of first components 81 and at least one or more second components 82 other than the light emitting unit 82a, the light receiving unit, and the display unit are present. The other second component 82 is mounted.

Here, the light emitting unit 82a is a detection means for detecting the substance to be detected that has flowed into the detection space, and is a light emitting means that emits the detected light toward the detection space through the first optical path hole 53. The light emitting unit 82a is configured by using, for example, a known light emitting element (for example, a light emitting diode or the like), and as shown in FIG. 3, a part of the light emitting unit 82a is fixed to the first fixed portion 51. The other part of the light emitting portion 82a is fixed to the substrate 70. Further, the light receiving unit is a detection means for detecting the substance to be detected that has flowed into the detection space, and is scattered light generated by the detection light emitted from the light emitting unit 82a being scattered by the substance to be detected that has flowed into the detection space. Is a light receiving means that receives light through the second light path hole. This light receiving portion is configured by using, for example, a known light receiving element (for example, a photodiode or the like), and a part of the light receiving portion is fixed to the second fixed portion and the other light receiving portion is fixed. A part is fixed to the substrate 70. Further, the display unit is a display means for displaying various information (for example, information indicating whether or not a fire has been detected). This display unit is configured by using, for example, a known display means (for example, an LED or the like), and a part of the light receiving unit is fixed to the third fixed unit and another one of the display unit. The portion is fixed to the substrate 70. The method of projecting light from this display unit is arbitrary, but for example, the light guide of FIG. 2B attached to the mounting holes (not shown) provided in each of the outer cover 20 and the detection unit main body 50. This corresponds to projecting light by guiding the light from the display unit toward the outside of the fire detection device 1 via 82d. The above-mentioned "light emitting unit 82a" and "light receiving unit" correspond to "fire detecting means" within the scope of the claims.

(Structure-sealing structure)
Returning to FIG. 3, next, the sealing structure of the fire detection device 1 will be described. The features of the sealing structure for improving the explosion-proof property of the fire detection device 1 are as shown below in the embodiment.

(Structure-sealing structure-first feature)
First, regarding the first feature of the sealing structure, as shown in FIGS. 3 and 4, the sealing portion 91, the holder portion 92, and the shield case portion 93 are provided on the upper surface of the substrate 70.

(Structure-sealing structure-first feature-sealing part)
The sealing portion 91 is a sealing means for sealing the component 80 by filling the target space portion 90 with the sealing portion 91, and is as shown in FIGS. 3 and 4B. , Is arranged on the upper surface of the substrate 70, which corresponds to the target space 90. Here, the "target space portion 90" means a space provided in the vicinity of the substrate 70 and in which the component 80 can be accommodated. Further, in the embodiment, the target space portion 90 is a space provided so as to correspond to only a part of the upper surface of the substrate 70 as shown in FIG. 4 (b), and at least a plurality of first spaces are provided. It will be described as a space in which all of the parts 81 can be accommodated. In the embodiment, the second component 82 may or may not be accommodated in the target space 90. The reason is that, as described above, since the distance between the terminals of the second component 82 is equal to or greater than a predetermined distance, even if the combustible gas flowing into the inside of the fire detection device 1 comes into contact with the second component 82, a fire will occur. This is because it is considered very unlikely that

The specific shape and size of the sealing portion 91 are arbitrary, but in the embodiment, the planar shape and the size of the sealing portion 91 are as shown in FIG. 4 (b). , The plane shape of the target space portion 90 and its size (substantially rectangular in FIG. 4B) are set to be substantially the same. Further, the vertical length of the sealing portion 91 is set to be substantially the same as the vertical length of the target space portion 90. Here, the size of the planar shape of the target space portion 90 is set to the size of a range extended by a predetermined distance in the vertical direction and the front-back direction from the range in which the component 80 is installed. Further, the vertical length of the target space portion 90 is set to a length extending from a position above the upper end of the tallest component of the first component 81 by a predetermined distance to the substrate 70. Further, the predetermined distance is preferably set to a distance equal to or longer than the distance specified in the explosion-proof regulation (specifically, 1 mm or more), and may be set to about 2.5 mm as an example.

Further, regarding the material of the sealing portion 91, in the embodiment, it is configured by using an insulating material from the viewpoint of explosion proofness, and specifically, it is configured by using an ultraviolet curable resin. As a result, the component 80 can be sealed relatively quickly as compared with other insulating materials, and the mountability of the sealing structure can be improved.

With such a configuration, the sealing portion 91 can be provided only on a part of the upper surface of the substrate 70, and the filling amount of the ultraviolet curable resin is reduced as compared with the case where the sealing portion 91 is provided on the entire upper surface of the substrate 70. It is possible to reduce the manufacturing cost, manufacturing time, and environmental load associated with manufacturing of the sealing portion 91.

(Structure-Sealing structure-First feature-Holder part)
The holder portion 92 is a damming means for damming the sealing portion 91 so as not to flow out to the outside of the target space portion 90 when the sealing portion 91 is filled in the target space portion 90, and the holder portion 92 of the holder portion 92. It is a blocking means for blocking noise from the outside. Here, the "noise" means an electromagnetic wave signal or an electric signal that may cause a malfunction or failure of the component 80.

As shown in FIG. 4B, the holder portion 92 is formed of an annular body. Specifically, the planar shape of the inner circumference of the holder portion 92 and its size are set to be substantially the same as the planar shape of the outer circumference of the sealing portion 91 and its size. Further, the planar shape of the outer circumference of the holder portion 92 and its size are substantially the same as the planar shape of the inner circumference of the holder portion 92, but are set to be larger than the inner circumference of the holder portion 92. Further, the vertical length of the holder portion 92 is set to be slightly longer than the vertical length of the sealing portion 91 (or the length is substantially the same as the vertical length of the sealing portion 91). May be there).

Further, as shown in FIG. 4B, the holder portion 92 is provided on the upper surface of the substrate 70 at a portion corresponding to the sealing portion 91. Specifically, the entire outer periphery of the sealing portion 91 is provided by the holder portion 92 on the upper surface of the substrate 70 so that the sealing portion 91 does not flow out from the holder portion 92 when the sealing portion 91 is filled in the target space portion 90. Are arranged so as to be substantially surrounded by the substrate 70, and are fixed to the substrate 70 by an adhesive material (for example, double-sided tape or the like).

Further, the material of the holder portion 92 is configured by using a material capable of blocking noise in the embodiment, and is configured by using a metal material such as copper, nickel, or aluminum as an example (note that it is configured by using a metal material such as copper, nickel, and aluminum). The same applies to the material of the shield case portion 93).

(Structure-Sealing structure-First feature-Shield case part)
The shield case portion 93 is a blocking means for blocking noise from the outside of the shield case portion 93. As shown in FIG. 4, the shield case portion 93 is formed of a substantially hollow body having an open lower surface. Specifically, the plane shape of the inner circumference of the shield case portion 93 and its size are slightly different from the plane shape of the outer circumference of the holder portion 92, and are set to be larger than the outer circumference of the holder portion 92. Further, the planar shape of the outer periphery of the shield case portion 93 and its size are substantially the same as the planar shape of the inner circumference of the shield case portion 93, but are set to be larger than the inner circumference of the shield case portion 93. Further, the vertical length of the shield case portion 93 is set to be slightly longer than the vertical length of the holder portion 92 (or the length is substantially the same as the vertical length of the holder portion 92. May be).

Further, as shown in FIG. 4, the shield case portion 93 is provided so as to cover the sealing portion 91 from above. Specifically, the shield case portion 93 covers the entire upper surface of the sealing portion 91, and the shield case portion 93 covers at least a part of the outer periphery of the holder portion 92. It is sandwiched by the substrate 70.

With such a first feature, the component 80 (particularly, the first component 81) mounted on the substrate 70 can be sealed by the sealing portion 91, and the explosion resistance of the fire detection device 1 can be improved. Further, since the holder portion 92 and the shield case portion 93 substantially cover the entire side surface of the target space portion 90 other than the side surface on the substrate 70 side, the outside of the holder portion 92 or the outside of the shield case portion 93. It is possible to block the noise from the component 80 and suppress the influence of the noise on the component 80. From the above, it is possible to improve the safety and usability of the fire detection device 1 to which the sealing structure is applied. Further, since a part of the blocking means is formed as the holder portion 92, it is not necessary to separately provide a member constituting the blocking means as compared with the case where a part of the blocking means is not formed as the holder portion 92. It is possible to reduce the number of parts.

(Structure-sealing structure-second feature)
Next, regarding the second feature of the sealing structure, as shown in FIGS. 4 and 5, a fixing portion 94 is provided on the upper surface of the substrate 70. The fixing portion 94 is a fixing means for fixing the shield case portion 93 to the substrate 70. The fixing portion 94 is configured by using, for example, a known fixing member for a substrate (for example, a clip-type fixing member), and as shown in FIG. 5, the shield case portion 93 on the upper surface of the substrate 70. At least one or more is arranged on the portion corresponding to the outer periphery of the substrate 70, and is fixed to the substrate 70 by a fitting structure or the like.

Due to such a second feature, the shield case portion 93 can be firmly fixed to the substrate 70 by the fixing portion 94. Further, when fixing the shield case portion 93, the fixing portion 94 can be used as a marker for alignment, and the shield case portion 93 can be easily and quickly attached. From the above, it is possible to improve the mountability of the shield case portion 93.

(Structure-sealing structure-third feature)
Returning to FIG. 3, the third feature of the sealing structure is that, as shown in FIG. 3, the light emitting portion 82a and the light receiving portion mounted on the substrate 70 have the sealing portion 91 on the side surface of the substrate 70. It is provided on the side surface opposite to the side surface on the provided side (that is, the lower surface of the substrate 70).

Due to such a third feature, the light emitting portion 82a and the light receiving portion are provided on the side surface of the side surface of the substrate 70 on the side where the sealing portion 91 is provided (that is, the upper surface of the substrate 70). Since it is easy to make the sealing portion 91 compact, it is possible to improve the mountability of the sealing portion 91.

(About the action of the sealing structure)
Next, the operation of the sealing structure configured as described above will be described.

First, when a flammable gas is present outside the fire detection device 1, when the flammable gas flows into the terminal board 60, the sealing portion 91 causes the component 80 of the substrate 70 (particularly, the first one). Since the component 81) is sealed, it is possible to prevent the combustible gas from coming into direct contact with the component 80, and thus it is possible to prevent the occurrence of a fire.

Further, when noise exists outside the fire detection device 1, when this noise flows into the terminal board 60, it is sealed by the sealing portion 91 by the shield case portion 93 and the holder portion 92. Since the component 80 is covered, noise can be blocked by the shield case portion 93 and the holder portion 92, so that it is possible to prevent the component 80 from malfunctioning or failing.

(About the mounting method of the sealing structure)
Subsequently, a method of attaching the sealing structure will be described.

First, the fixing portion 94 is attached to a predetermined position on the upper surface of the substrate 70 on which the component 80 (first component 81 and second component 82) is mounted. Next, the holder portion 92 is arranged on the upper surface of the substrate 70 on which the component 80 is mounted, which substantially corresponds to the target space portion 90, and the holder portion 92 is fixed to the substrate 70 by an adhesive member. Next, the sealing portion 91 is formed inside the holder portion 92 attached to the substrate 70. The method for forming the sealing portion 91 is arbitrary, but the inside of the holder portion 92 is filled with a liquid ultraviolet curable resin using a known ejection device (for example, a dispenser), and then ultraviolet rays are emitted until a predetermined time elapses. It is formed by curing the cured resin. In this case, for example, it is desirable to remove the bubbles by using a known defoaming method so that bubbles are not formed inside the sealing portion 91. Then, a shield case portion 93 is provided on the upper surface of the substrate 70. Specifically, the shield case portion 93 is arranged so that the sealing portion 91 and the holder portion 92 are covered by the shield case portion 93, and the shield case portion 93 is fixed to the substrate 70 by the fixing portion 94. This completes the installation of the sealing structure. By such an attachment method, the sealing structure can be attached relatively easily and quickly, and the attachmentability of the sealing structure can be improved.

(Effect of embodiment)
As described above, according to the embodiment, the sealing portion 91 formed of the insulating material, and the component 80 mounted on the substrate 70 by filling the target space portion 90 with the sealing portion 91. A sealing portion 91 for sealing, a holder portion 92 and a shield case portion 93 arranged so as to cover at least a part of the target space portion 90 sealed by the sealing portion 91, and the holder portion. Since the holder portion 92 and the shield case portion 93 for blocking noise from the outside of the 92 or the shield case portion 93 are provided, the component 80 mounted on the substrate 70 can be sealed by the sealing portion 91. The explosion resistance of the fire detection device 1 can be improved. Further, since at least a part of the target space portion 90 is substantially covered by the holder portion 92 and the shield case portion 93, noise from the outside of the holder portion 92 or the shield case portion 93 can be blocked, and the component 80 is affected by the noise. You can suppress receiving. From the above, it is possible to improve the safety and usability of the device to which the sealing structure is applied.

Further, since a part of the blocking means is formed as a holder portion 92 for damming the sealing portion 91 so as not to flow out to the outside of the target space portion 90 when the sealing portion 91 is filled in the target space portion 90. Compared with the case where a part of the blocking means is not formed as the holder portion 92, it is not necessary to separately provide a member constituting the blocking means, so that the number of parts of the sealing structure can be reduced.

Further, since the fixing portion 94 provided at the position corresponding to the shield case portion 93 of the substrate 70 and the fixing portion 94 for fixing the shield case portion 93 to the substrate 70 is provided, the fixing portion 94 is provided. The shield case portion 93 can be firmly fixed to the substrate 70. Further, when fixing the shield case portion 93, the fixing portion 94 can be used as a marker for alignment, and the shield case portion 93 can be easily and quickly attached. From the above, it is possible to improve the mountability of the shield case portion 93.

Further, since the component 80 sealed by the sealing portion 91 includes the first component 81 in which the distance between the terminals is less than a predetermined distance, the first component 81 can be sealed by the sealing portion 91, further improving the explosion resistance. Can be improved.

Further, since the insulating material is an ultraviolet curable resin, the component 80 can be sealed relatively quickly as compared with other insulating materials, and the mountability of the sealing structure can be improved.

Further, since the fire detecting means mounted on the substrate 70 is provided on the side surface of the side surface of the substrate 70 opposite to the side surface on the side opposite to the side surface where the sealing portion 91 is provided, the fire detecting means is provided on the side surface of the substrate 70. Of these, compared to the case where the sealing portion 91 is provided on the side surface on the side where the sealing portion 91 is provided, it is easier to make the sealing portion 91 more compact, so that it is possible to improve the mountability of the sealing portion 91. ..

[III] Modifications to the Embodiment The embodiment of the present invention has been described above, but the specific configuration and means of the present invention are within the scope of the technical idea of each invention described in the claims. Can be arbitrarily modified and improved. Hereinafter, such a modification will be described.

(About the problem to be solved and the effect of the invention)
First, the problem to be solved by the invention and the effect of the invention are not limited to the above-mentioned contents, and may differ depending on the implementation environment and the details of the configuration of the invention, and only a part of the above-mentioned problems. May be resolved or only some of the above effects may be achieved.

(About the application target of the sealing structure)
In the above embodiment, it has been described that the sealing structure is applied to the fire detection device 1, but the present invention is not limited to this. For example, it may be applied to a device other than the fire detection device 1, and as an example, it may be applied to a control device, a communication device, a lighting device, or the like.

(About the target space)
In the above embodiment, it has been described that the target space 90 is provided on the upper surface of the substrate 70, but the present invention is not limited to this, and the target space 90 may be provided on the lower surface of the substrate 70, for example. Further, in the above embodiment, it has been described that the target space 90 is provided so as to correspond to only a part of the upper surface of the substrate 70, but the present invention is not limited to this, and for example, it is provided over the entire upper surface of the substrate 70. You may.

(About the sealing structure)
In the above embodiment, the sealing structure includes the fixing portion 94, but the present invention is not limited to this, and for example, the fixing portion 94 may be omitted.

(About the sealing part)
In the above embodiment, it has been described that the sealing portion 91 is configured by using the ultraviolet curable resin, but the present invention is not limited to this. For example, it may be configured by using an insulating material other than the ultraviolet curable resin, and as an example, it may be configured by using silicone, urethane resin or the like.

(About blocking means)
In the above embodiment, it has been described that the blocking means (shield case portion 93 and holder portion 92) covers the entire side surface of the target space portion 90 other than the side surface on the substrate 70 side, but the present invention is not limited to this. .. For example, when the component 80 sealed by the sealing portion 91 includes a component 80 that is not easily affected by noise, the noise is affected by the blocking means among the other aspects described above. Only the portion excluding the difficult component 80 (that is, only a part of the other side surface described above) may be covered. Alternatively, when the influence of noise on the component 80 (specifically, the second component 82) not sealed by the sealing portion 91 in addition to the component 80 sealed by the sealing portion 91 is reduced. May cover the entire area of the other side surface to which the component 80 not sealed by the sealing portion 91 is added.

(About the holder)
In the above embodiment, it has been described that the holder portion 92 has a blocking function, but the present invention is not limited to this. For example, the holder portion 92 does not have to have a blocking function. In this case, a blocking member (blocking means) capable of covering the entire outer circumference of the sealing portion 91 may be separately provided, or the shield case portion 93 may cover the entire outer circumference of the sealing portion 91. , The shield case portion 93 may be formed.

(Additional note)
The sealing structure of Appendix 1 is a sealing structure for sealing parts mounted on a substrate, is a sealing means formed of an insulating material, and is a target space provided in the vicinity of the substrate. By filling the target space portion, which is a portion and can accommodate the component, with the sealing means, the sealing means for sealing the component and the target space sealed by the sealing means. It is a blocking means arranged so as to cover at least a part of the portion, and is provided with a blocking means for blocking noise from the outside of the blocking means.

Further, in the sealing structure of the appendix 2, in the sealing structure described in the appendix 1, a part of the blocking means is used as the target when the sealing means is filled in the target space. It was formed as a holder part to prevent it from flowing out to the outside of the space part.

Further, the sealing structure of Appendix 3 is a fixing means provided at a position corresponding to the blocking means in the substrate in the sealing structure described in Appendix 1 or 2, and the blocking means is attached to the substrate. It was equipped with a fixing means for fixing it.

Further, the sealing structure of the appendix 4 is the sealing structure according to any one of the appendices 1 to 3, wherein the component sealed by the sealing means has a terminal-to-terminal distance of less than a predetermined distance. including.

Further, the sealing structure of the appendix 5 is the sealing structure according to any one of the appendices 1 to 4, and the insulating material is an ultraviolet curable resin.

Further, the fire detection device of Appendix 6 is a fire detection device for detecting and notifying a fire in the monitoring area, and is a fire detection device having the sealing structure according to any one of claims 1 to 5. Therefore, a fire detection means mounted on a substrate of the fire detection device for detecting the fire is provided, and a sealing means of the sealing structure on the side surface of the substrate is provided. It was provided on the side surface opposite to the side surface.

(Effect of appendix)
According to the sealing structure described in Appendix 1 and the fire detection device described in Appendix 6, the sealing means is formed of an insulating material, and the target space is filled with the sealing means. A sealing means for sealing a component mounted on a substrate and a blocking means arranged so as to cover at least a part of a target space sealed by the sealing means, and the outside of the blocking means. Since it is provided with a blocking means for blocking noise from the fire, the components mounted on the substrate can be sealed by the sealing means, and the explosion resistance of the fire detection device can be improved. Further, since at least a part of the target space is substantially covered by the blocking means, noise from the outside of the blocking means can be blocked, and the component can be suppressed from being affected by the noise. From the above, it is possible to improve the safety and usability of the device to which the sealing structure is applied.

According to the sealing structure described in Appendix 2, a holder for damming a part of the blocking means so that the sealing means does not flow out of the target space when the sealing means is filled in the target space. Since it is formed as a portion, it is not necessary to separately provide a member constituting the blocking means as compared with the case where a part of the blocking means is not formed as a holder portion, so that it is possible to reduce the number of parts of the sealing structure. ..

According to the sealing structure described in Appendix 3, the fixing means provided at the position corresponding to the blocking means in the substrate is provided, and the fixing means for fixing the blocking means to the substrate is provided, so that the fixing means is fixed. The blocking means can be firmly fixed to the substrate by the means. Further, when fixing the blocking means, the fixing means can be used as a marker for alignment, and the blocking means can be easily and quickly attached. From the above, it is possible to improve the mountability of the blocking means.

According to the sealing structure described in Appendix 4, since the parts sealed by the sealing means include the parts whose terminal-to-terminal distance is less than the predetermined distance, the terminal-to-terminal distance is equal to or less than the predetermined distance by the sealing means. Parts can be sealed and explosion resistance can be further improved.

According to the sealing structure described in Appendix 5, since the insulating material is an ultraviolet curable resin, the parts can be sealed relatively quickly as compared with other insulating materials, and the mountability of the sealing structure can be improved.

According to the sealing structure described in Appendix 6, the fire detecting means mounted on the substrate of the fire detection device is opposite to the side surface of the substrate on the side where the sealing means of the sealing structure is provided. Since it is provided on the side surface, it is easier to make the sealing means more compact than when the fire detecting means is provided on the side surface of the side surface of the substrate on the side where the sealing means of the sealing structure is provided. Therefore, it is possible to improve the mountability of the sealing means.

1 Fire detection device 2 Installation surface 10 Mounting base 20 Outer cover 21 Inflow / outflow opening 40 Insect repellent net 50 Detection part main body 51 First fixing part 53 First optical path hole 60 Terminal board 61 Mounting member 61a First mounting hole 61b Second mounting hole 62 Machine name plate 70 Board 80 Parts 81 1st part 82 2nd part 82a Light emitting part 82d Light guide 90 Target space part 91 Sealing part 92 Holder part 93 Shield case part 94 Fixed part

Claims (1)

It is a mounting method of a sealing structure for sealing the parts mounted on the board.
At a position corresponding to the target space portion, which is the upper space of the target surface region, which is the surface region of the substrate on which the target component to be sealed is mounted, and which is the space in which the target component is housed. The damming means to be installed, and for damming the sealing means so as not to flow out to the outside of the target space when the sealing means for sealing the target component is formed, is described above. The first step of installing the target space on the outer peripheral side of the target surface region so as to substantially surround the target space.
After the first step, the sealing means is obtained by filling and curing a liquid ultraviolet curable resin inside the damming means that substantially surrounds the target space portion and inside the target space portion. The second step of forming in the target space and
After the second step, a blocking means for blocking external noise from the target component sealed by the sealing means is provided in the target space portion sealed by the sealing means. The third step of installing so as to cover at least a part,
How to install the sealing structure including.

Images