JP4690138B2 - Enclosure - Google Patents

Description

  The present invention relates to a housing, and in particular, accommodates a wiring board on which a connection connector to be connected to an external device is mounted and has a top surface attached to a ceiling, and exposes the connection connector to the outside. Therefore, the present invention relates to a housing having an exposure hole provided on the top surface of the housing body.

  Conventionally, as an example of the above-described case, a case constituting a gas / fire alarm device as shown in FIG. 9 has been proposed. The alarm device case shown in FIG. 9 is of the type installed on the ceiling. As shown in the figure, the alarm device includes a casing main body 110 in which a wiring board (not shown) on which a gas sensor for detecting various gas concentrations, a temperature sensor for detecting ambient temperature, an alarm buzzer, and the like are mounted is accommodated. It has. The casing body 110 is attached to the ceiling 111 via the attachment base 112 so that the top surface R faces the ceiling 111. This alarm generates an alarm to notify that when a gas leak, CO (carbon monoxide) concentration increase, or fire has occurred.

  The wiring board housed in the casing body 110 is equipped with a plurality of external connection terminals such as a gas leak output terminal, a CO output terminal, a fire abnormality alarm output terminal, and a microcomputer meter output terminal (all are shown in the figure). Not shown). In the conventional alarm case, the signal line 116 is connected to each output terminal described above by soldering, and a plurality of signal lines 116 connected to each output terminal are provided in the case body 110 (not shown). ).

  The signal line 116 is connected to the ceiling-side signal line 120 drawn from the ceiling 112 by a closed-end crimp connector 121. Note that the surplus of the signal line 116 and the closed-end crimp connector 121 are accommodated in a signal line accommodation groove 113 provided on the top surface R of the housing body 110. The signal line 116 is connected to an external device such as a gas meter, a central control panel, or an outdoor buzzer via a ceiling-side signal line 120 arranged in the ceiling 111, and the external device is interlocked with the alarm device. (For example, Patent Documents 1 and 2).

  As described above, since the signal line accommodation groove 113 faces the ceiling, moisture generated by condensation or the like tends to collect here. Therefore, the outlet of the signal line 116 is provided on the side surface 113a of the signal line housing groove 113 so that the water does not enter the casing body, and the outlet does not face the ceiling 111.

  By the way, the necessary signal lines 116 are different depending on the user's request, such as one, two, three, and four. However, in the conventional alarm device case, the signal lines 116 connected to all the output terminals mounted on the wiring board by soldering are drawn out from the outlets, and are drawn out to the signal lines 116 that are not required by the user. It is. In order to draw out only the signal line connected to the output terminal required by the user, for example, it is necessary to perform soldering at the time of installation and connect the signal line 116 to the output terminal required by the user. It takes time and is difficult in practice.

  Therefore, multiple output connectors such as gas leak output, CO output, fire abnormality alarm output, microcomputer meter output, etc. are mounted on the wiring board of the alarm case, and the output connectors are exposed from the exposed holes provided in the alarm case. It is possible to expose. Thus, by providing the output connector so as to be exposed to the outside, the signal line 116 connected to the output connector required at the time of installation can be pulled out.

  Considering the connection work efficiency between the output connector and the signal line 116 described above, the exposure hole needs to be provided toward the ceiling. For this reason, it is easy for water to enter the inside of the casing body 110 from the exposed hole. In particular, when the exposure hole is formed in communication with the signal line accommodation groove 113 as described above, there is a problem that water accumulated in the signal line accommodation groove 113 enters the housing body through the exposure hole. It was.

  Therefore, as shown in FIG. 10, an alarm housing having a cover that covers the exposure hole is considered. FIG. 4A is an enlarged view of the back surface of a type of alarm device case installed on the ceiling, and FIG. 4B is an enlarged view of a portion of the alarm device housing taken along the line I-I shown in FIG. As shown in the figure, the alarm device housing accommodates a wiring board 115 on which a plurality of output connectors 118 (= connecting connectors) such as a gas leak output, a CO output, a fire abnormality alarm output, and a microcomputer meter output are mounted. A housing main body 110 including an upper case 110a and a lower case 110b is provided.

  The housing body 110 has an exposure hole 110c for exposing the output connector 118 to the outside, and a fitting recess 110d for fitting a cover 119 covering the exposure hole 110c. Further, the alarm housing includes a cover 119 fitted into the fitting recess 110d described above, and a signal line 116 connected to the output connector 118 is drawn out from an outlet 119a formed in the cover 119.

As shown in the figure, since the outlet 119a is formed at a position facing the exposed hole 110c, the exposed hole 110c is exposed from the outlet 119a. For this reason, there is a problem that water has entered the housing main body 110 from the outlet 119a through the exposure hole 110c, and the cover 119 has little meaning.
JP 2001-14567 A JP 2004-21653 A

  Therefore, the present invention pays attention to the above-mentioned problems, and provides a housing that prevents water from entering the housing body from the exposed hole of the connection connector that opens toward the ceiling provided in the housing body. The issue is to provide.

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a housing main body that accommodates a wiring board on which a connection connector to be connected to an external device is mounted and is mounted with its top surface facing the ceiling, the housing In a housing constituting an alarm device comprising: a recess provided on the top surface of the body body; and an exposure hole opened toward the ceiling provided in the recess to expose the connection connector to the outside. A concave connection line receiving groove provided on the top surface of the housing main body so as to communicate with the side wall of the recess for receiving a connection line connected to the connection connector, and the housing from the connection line receiving groove. A drainage groove that is provided so as to reach the top surface end portion of the body main body, and that is inclined vertically downward toward the top surface end portion of the housing main body, and a cover that covers the entire opening of the concave portion, comprising a side wall of the recess Provided said connecting line is drawn from between the cover and the recess through the communicating portion with the connection line receiving groove outside the cover, that is housed in said connection line receiving groove of the cover external It resides in a characteristic housing.

  According to the first aspect of the present invention, the drain groove reaching the top surface end of the housing body from the connection line housing groove is formed with an inclination that is inclined vertically downward toward the top surface end of the housing. . Therefore, the water accumulated in the connection line accommodation groove is discharged to the top surface end portion along the inclination of the drainage groove and does not reach the exposure hole.

According to the first aspect of the present invention , the connection line is drawn to the outside of the cover from between the recess and the cover through the communication portion with the connection line receiving groove provided on the side wall of the recess, and the connection line outside the cover It is accommodated in the accommodation groove. Therefore, the connection line can be drawn out of the cover from between the recess and the cover through the communication portion with the connection line accommodation groove provided on the side surface of the recess . For this reason, it is not necessary to form an outlet opening in the cover that opens toward the ceiling and exposes the exposure hole.

According to a second aspect of the present invention, there is provided a projection provided in the connection line accommodation groove in order to close a communication portion with the connection line accommodation groove provided in the side wall of the recess. Exist in the housing.

According to invention of Claim 2, the protrusion provided in the connection line accommodation groove closes the connection part with the connection line accommodation groove provided in the side wall of a recessed part . Therefore, when it is not necessary to connect the connection line connected to the connection connector, the communication portion is blocked by the protrusion, so that water does not enter from the communication portion . Further, when it is necessary to connect the connection line, the protrusion can be cut out and the connection line can be passed through the communication part .

According to a third aspect of the present invention, the connection line accommodation groove includes an accommodation portion provided outside the recess, and a linear guide portion provided inside the recess and having a smaller accommodation area than the accommodation portion. It is comprised in the housing | casing of Claim 1 or 2 characterized by the above-mentioned.

According to the third aspect of the present invention, connection line receiving groove, and a housing part which is provided outside of the recess, provided in the recess, than housing part is composed of a small linear guide portion of accommodating area ing. Therefore, the connection line can be guided to the accommodation portion by the linear guide portion, and the surplus portion of the connection line can be accommodated in the accommodation portion having a larger accommodation area than the linear guide portion.

  As described above, according to the first aspect of the present invention, the water accumulated in the connecting wire receiving groove is discharged to the top surface end along the slope of the drainage groove and does not reach the exposure hole. It is possible to prevent water from entering the housing body from the exposed hole of the connection connector that opens toward the ceiling provided in the body body.

Further, according to the first aspect of the invention, connection lines, connecting lines can be drawn from between the recess and the cover through the communicating portion of the connecting line accommodating groove provided in the side face of the recess in the cover outside . For this reason, it is not necessary to form an outlet opening in the cover that opens toward the ceiling and exposes the exposure hole, so that the housing is opened from the exposure hole of the connection connector that opens toward the ceiling provided in the housing body. It is possible to prevent water from entering the main body.

According to the second aspect of the present invention, when it is not necessary to connect the connection line connected to the connection connector, the communication portion is blocked by the protrusion, so that water may enter from the communication portion. Therefore, it is possible to prevent water from entering the housing main body through the exposed hole of the connection connector that opens toward the ceiling provided in the housing main body. Further, when it is necessary to connect the connection line, the protrusion can be cut off and the connection line can be passed through the communication part .

According to the third aspect of the present invention, the connection line can be guided to the accommodation portion by the linear guide portion, and the excess portion of the connection line can be accommodated in the accommodation portion having a larger accommodation area than the linear guide portion. Since it can do, it can accommodate in an accommodating part and can aim at the improvement of aesthetics.

1st Embodiment Hereinafter, the housing | casing and cover of this invention in 1st Embodiment are demonstrated based on drawing. FIG. 1 is a side view of an alarm device housing of the type installed on the ceiling, which is the housing of the present invention. FIG. 2 is an exploded partial top view of the alarm housing shown in FIG. 3 is an exploded cross-sectional view taken along the line II-II of the alarm housing shown in FIG. 4 (a) is a partial top view when no signal line is connected to the output connector 18 of the alarm device case shown in FIG. 1, and FIG. 4 (b) is an III-III view of the alarm case shown in FIG. 4 (a). FIG.

  As shown in FIG. 3, the alarm case has a gas sensor that detects various gas concentrations, a temperature sensor that detects ambient temperature, and an alarm buzzer (none of which are shown), and an output connector 18 that is connected to an external device. A housing body 10 is provided that accommodates the wiring board 15 on which (= connector connector) is mounted. As shown in FIG. 1, the housing body 10 is attached to the ceiling 11 via an attachment base 12 so that the top surface R faces the ceiling 11. This alarm generates an alarm to notify that when a gas leak, an increase in CO concentration, or a fire occurs. Examples of the output connector 18 described above include gas leak alarm output, CO output, fire abnormality alarm output, and microcomputer meter output.

  As shown in FIGS. 2 to 4, the alarm housing also includes an exposure hole 10 c provided in the top surface R of the housing body 10 in order to expose the output connector 18 to the outside. Thus, by exposing the output connector 18 from the exposure hole 10c, as shown in FIGS. 1 to 3, the end of the signal line 16 (= connection line) can be easily connected to the output connector 18 when the alarm housing is installed. The necessary signal line 16 can be pulled out from the alarm housing by connecting the connector 16a provided in the section.

  As shown in FIGS. 2 to 4, the alarm device housing is also provided on the top surface R of the housing body 10 so as to communicate with the exposure hole 10 c to accommodate the signal line 16 connected to the output connector 18. Signal line receiving groove 13 (= connection line receiving groove). The signal line 16 is accommodated in the signal line accommodating groove 13 and then connected to an external device through the ceiling 11 as shown in FIG. As shown in FIGS. 2 to 4, the alarm housing includes a drainage groove 22 that reaches from the signal line housing groove 13 to the top surface end T of the housing body 10. The drainage groove 22 is formed with an inclined surface that is inclined vertically downward Y1 toward the top surface end T of the housing body 10.

  Therefore, even if water accumulates in the signal line accommodation groove 13 due to dew condensation or the like, the water accumulated in the signal line accommodation groove 13 is discharged from the top surface end T along the inclined surface of the drainage groove 22, and thus the exposure hole 10 c. Never reach. For this reason, water can be prevented from entering the casing body 10 through the exposed hole 10c of the output connector 18 that opens toward the ceiling 11 provided in the casing body 10.

  The alarm device housing also includes a cover 19 that covers the exposure hole 10c described above, and a fitting recess 10d that is provided on the top surface of the housing body 10 for fitting the cover 19. As shown in FIG. 2, the signal line housing groove 13 described above is provided deeper than the fitting recess 10 d and is provided so as to reach the outside of the fitting recess 10 d from the exposure hole 10 c. By providing the signal line accommodation groove 13 in this way, a gap S (FIGS. 3 and 4B) reaching the end of the cover 19 from the exposure hole 10c is provided between the signal line accommodation groove 13 and the cover 19. It is done.

  The signal line 16 is pulled out from the cover 19 lateral end portion Ts through the gap S. As a result, the signal line 16 can be pulled out of the cover 19 without providing the cover 19 with an outlet opening toward the top surface R and exposing the exposure hole 10c. Further, since the gap S is substantially blocked by the signal line 16, the water accumulated in the signal line accommodation groove 13 does not reach the exposure hole 10 c through the gap S, and water enters the housing body 10. There is no.

  The depth of the signal line accommodation groove 13 is formed to be slightly larger than the thickness of the signal line 16. Thereby, the signal line 16 does not protrude from the concave surface of the fitting recess 10d that is one step higher, and the signal line 16 is received by the cover 19 when the signal line 16 is received in the signal line receiving groove 13 and the cover 19 is inserted. Can be prevented from being damaged. Further, the size of the gap S may be approximately the same as or slightly smaller than the thickness of the signal line 16, and the signal line 16 may be held with the gap S between the signal line housing groove 13 and the cover 19. . By sandwiching the signal line 16 in the gap S in this way, the connector connection with the output connector 18 is not easily disconnected even if the signal line 16 is pulled.

  Next, a case where the signal line 16 is not connected to the output connector 18 will be described. As shown in FIG. 4, a knockout 13 a (protrusion) that protrudes vertically upward to close the gap S from the side end Ts side of the cover 19 is integrally formed outside the cover 19 in the signal line housing groove 13. Yes. Since the gap S is blocked by the knockout 13a, the water accumulated in the signal line accommodation groove 13 does not reach the exposure hole 10c through the gap S in which the signal line 16 is not accommodated. Water does not enter inside. Further, when it is necessary to connect the signal line 16, the knockout 13a can be cut out and the signal line 16 can be easily passed through the gap S.

Second Embodiment Next, a housing of the present invention in a second embodiment will be described with reference to the drawings. FIG. 5 is an exploded partial rear view of the alarm housing in the second embodiment. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in the figure, the signal line accommodating portion 13 is provided between the large area accommodating portion 13b provided outside the cover 19, and between the exposure hole 10c and the large area accommodating portion 13b. It is comprised from the linear guide part 13c of the accommodation area smaller than the part 13b. With this configuration, the signal line 16 can be guided to the end of the cover 19 and the large-area accommodating portion 13b by the linear guide portion 13c. Furthermore, since the surplus portion of the signal line 16 can be accommodated in the large area accommodating portion 13b, the aesthetics can be improved.

Third Embodiment Next, a housing of the present invention in a third embodiment will be described with reference to the drawings. FIG. 6 is a rear view of the alarm housing in the third embodiment. FIG. 7 is a partial sectional view showing the finger catching recess 20 shown in FIG. FIG. 8 is a rear view of the alarm housing when a finger is caught in the finger catching recess 20 shown in FIG. 6. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in the figure, for example, six finger catching recesses 20 are formed in the rear peripheral portion of the alarm housing.

  As shown in FIG. 7, the recess 20 has a width W that is substantially the same as the width of a human finger. Further, the recess 20 is formed as a curved surface, and the curved surface has a curvature that matches a human finger. A drainage groove 22 is further formed in one of the six recesses 20. SL is a gas sensor slit SL for introducing outside air into the alarm housing and guiding it to the gas sensor. According to the above configuration, the alarm housing can be grasped by hooking a finger to 3 to 4 positions among the six recesses 20, the cover 20, and the gas sensor slit SL as shown in FIG. For this reason, it becomes easy to grasp the alarm device housing, and it becomes easy during the mounting operation to the ceiling. Moreover, since there are eight places where it is easy to hook a finger, the alarm housing can be grasped from any direction.

  In the above-described first to third embodiments, the drainage groove 22 reaching the top surface end T of the housing body 10 from the signal line housing groove 13 communicating with the exposure hole 10c covered with the cover 19 is provided. It was. However, the present invention is not limited to this. For example, the present invention can be applied to the signal line accommodation groove 13 communicating with the exposure hole 10 c not covered with the cover 19.

  In the first to third embodiments described above, the knockout 13 a is provided outside the cover 19 of the signal line housing groove 13 and closes the gap S from the end of the cover 19. However, the position where the knockout 13a is provided is not limited to this, and may be a position where the gap S between the signal line accommodation groove 13 and the cover 19 can be closed. For example, the signal line accommodation groove 13 may be provided inside the cover 19.

  Further, in the first to third embodiments described above, the knockout 13a is provided so as to completely block the entire gap S between the signal line housing groove 13 and the cover 19. However, the present invention is not limited to this, and it is also conceivable to provide the gap S so as to close only the portion formed by the signal line accommodation groove 13.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a side view of an alarm device case of the type installed on the ceiling which is the case of the present invention. It is a decomposition | disassembly partial top view of the alarm device housing | casing shown in FIG. FIG. 3 is a partial cross-sectional view taken along the line II-II of the alarm housing shown in FIG. 2. (A) is a partial top view when a signal line is not connected to the output connector 18 of the alarm housing shown in FIG. 1, and (b) is a III-III line portion of the alarm housing shown in (a). It is sectional drawing. It is a decomposition | disassembly partial rear view of the alarm device housing | casing in 2nd Embodiment. It is a rear view of the alarm housing | casing in 3rd Embodiment. It is a fragmentary sectional view which shows the hollow 20 for finger hooking shown in FIG. FIG. 7 is a rear view of the alarm housing when a finger is hooked on the finger catching recess 20 shown in FIG. 6. It is a figure which shows an example of the alarm device housing | casing of the type installed in the conventional ceiling. (A) is the back surface partial enlarged view of the alarm device housing | casing of the type installed in a ceiling, (b) is the II sectional view taken on the line of the alarm device housing | casing shown to (a).

Explanation of symbols

R Top surface S Clearance T Top surface edge Y1 Vertical downward 10 Housing body 10c Exposed hole 11 Ceiling 13 Signal line accommodation groove (connection line accommodation groove)
13a Knockout (protrusion)
13b Large area accommodating portion 13c Linear guide portion 15 Wiring board 16 Signal line (connection line)
18 Output connector (connector connector)
19 Cover 22 Drain

Claims (3)

A housing main body that accommodates a wiring board on which a connection connector to be connected to an external device is mounted and whose top surface is attached to the ceiling, a recess provided on the top surface of the housing main body, and the connection connector externally In the casing constituting the alarm device comprising an exposure hole that opens toward the ceiling provided in the recess for exposure to
A concave connecting line receiving groove provided on the top surface of the housing body so as to communicate with the side wall of the concave portion in order to receive a connecting line connected to the connecting connector;
A drainage groove that is provided so as to reach the top surface end portion of the housing body from the connection line housing groove, and has a slope that is inclined downwardly toward the top surface end portion of the housing body,
A cover covering the entire opening of the recess,
The connection line is drawn outside the cover from between the recess and the cover through a communication portion with the connection line accommodation groove provided on the side wall of the recess, and accommodated in the connection line accommodation groove outside the cover. A housing characterized by being made . The housing according to claim 1, further comprising: a protrusion provided in the connection line accommodation groove in order to close a communication portion with the connection line accommodation groove provided in the side wall of the recess . The connection line housing groove is configured by a housing portion provided outside the recessed portion, and a linear guide portion provided inside the recessed portion and having a smaller housing area than the housing portion. The housing according to claim 1 or 2 .

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