JP2016091381A - Detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detector capable of properly covering a detection part to be housed in a case while increasing a design property, reducing the number of components, and simplifying a configuration.SOLUTION: A detector includes an opening of a case 7, for housing a detection part 2 for detecting a detection object, including: a first cover 8 for covering at least the hole of detection part installation area; and a second cover 9 for covering the first cover 8.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a detector in which a detection unit that detects a detection target is housed in a case.

  The detector is, for example, smoke that is generated by fire, temperature rise, CO gas generated by incomplete combustion, leaked gas generated by gas leakage such as city gas, etc. It is used as an alarm device that gives an alarm. This detector includes, for example, a case composed of a lower case and an upper case, and in the case, a substrate on which a detector is disposed so as to be positioned on the upper case side is stored, and on the upper side of the upper case, A decorative panel that covers the entire upper case is provided (see, for example, Patent Document 1).

JP 2001-14572 A

  In the detector described in Patent Document 1, an insertion hole is formed in the upper case to insert the detection unit, and the detection unit is provided in a state of passing through the upper case in the vertical direction through the insertion hole. Therefore, it is necessary to cover the part that penetrates the upper case in the detection unit, and the shape of the decorative panel is formed in a shape that covers the penetration part, or a sensor guard that covers the penetration part is provided. Therefore, the shape of the decorative panel is limited to a shape that covers the penetrating portion of the detection unit, and the decorative panel cannot be designed into a free shape considering aesthetics or the like. Further, if a new sensor guard is provided, the number of parts increases and the configuration becomes complicated.

  In view of this situation, the main problem of the present invention is to provide a detector that can appropriately cover the detection unit housed in the case while improving design, reducing the number of parts, and simplifying the configuration. There is in point to do.

  In the first characteristic configuration of the present invention, a first cover that covers at least the entire detection unit installation region and a second cover that covers the first cover are provided in an opening of a case that houses a detection unit that detects a detection target. It is in the point provided.

  According to this characteristic configuration, since the first cover covers at least the entire detection unit installation region, the shape of the second cover can be freely taken into consideration for aesthetics etc. while protecting at least the detection unit with the first cover. Design can be adopted. Further, for example, it is not necessary to provide a separate member such as a sensor guard for covering the detection unit installation area, and appropriately covers the detection unit housed in the case while reducing the number of parts and simplifying the configuration. Can do.

  According to a second characteristic configuration of the present invention, the case includes a lamp portion, the first cover includes a transparent or translucent lamp cover portion that covers the lamp portion, and the second cover includes And a lamp exposure part for exposing the lamp cover part of the first cover to the outside.

  According to this characteristic configuration, the first cover can cover the lamp unit not only in the entire detection unit installation area but also in the lamp cover part. Therefore, the member which covers the lamp portion with the first cover can also be used, and the configuration can be simplified. Since the second cover is provided with the lamp exposed portion, the light of the lamp portion can be visually recognized from the outside even when the second cover is attached.

  According to a third characteristic configuration of the present invention, a plurality of the lamp portions are provided at intervals, and the first cover has a plurality of the lamp cover portions corresponding to each of the plurality of lamp portions at intervals. Provided that a light-shielding portion is provided between the lamp cover portions.

  According to this characteristic configuration, since the first cover is provided with the lamp cover portion for each of the plurality of lamp portions, each lamp portion can be appropriately covered. And by providing the light-shielding part between lamp cover parts, the light of a some lamp part can be prevented from mixing and it can grasp | ascertain which lamp part is lit appropriately.

  According to a fourth aspect of the present invention, there is provided an operation unit supported between the case and the first cover, and the second cover is configured to expose the operation unit so that the operation unit can be exposed from the outside. It is in the point where the part is provided.

  According to this characteristic configuration, the operation unit is supported between the case and the first cover in a state where the second cover is removed. Thereby, the second cover does not need to have a configuration for supporting the operation unit, and the degree of freedom in design can be improved. In addition, among the devices stored in the case, the operator does not have to support the operation unit when performing the attaching / detaching operation of the device exposed by removing the second cover. It can be done easily. And when a 2nd cover is mounted | worn, an operation part can be appropriately operated from the exterior in the operation part exposure site | part.

  According to a fifth characteristic configuration of the present invention, a battery as a power source is accommodated in the case on the opening side portion of the case, and the first cover is attached to the case in a state where the battery is exposed, A 2nd cover exists in the point with which the said battery is mounted | worn with the state covered.

  According to this characteristic configuration, since the battery is stored in the opening side portion of the case, a space can be formed between the battery and the case on the side opposite to the opening side. Therefore, for example, it is possible to effectively utilize the space as a distribution space for air flowing into the case or a storage space for other devices, and to make the detector compact by effectively utilizing the limited space. it can. Since the first cover is attached to the case with the battery exposed, it is possible to expose the battery while covering other devices by simply removing the second cover. Can be performed easily.

Overall perspective view of the detector Sectional view of II-II in FIG. Sectional view of III-III in FIG. Front view of detector with first cover, second cover and substrate removed Exploded perspective view of first case, substrate and first cover Exploded perspective view of the first case and the second cover with the first cover attached The perspective view which shows the mounting state of a 1st cover. The perspective view which shows the mounting state of a 2nd cover. The figure which shows the support state of the operation part for alarm stop Sectional drawing which shows the lamp cover part and light-shielding part of a 1st cover

An embodiment of a detector according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the detector includes a detection unit 2 that detects a detection target by supplying power from the power supply unit 1, and a casing 3 that houses the detection unit 2. The casing 3 is provided with a locking portion 5 provided with a mounting hole 4 for hanging on the top thereof in a protruding state. As a result, the casing 3 is attached to a wall surface of the room using a fixture such as a screw 6.

  Here, in the figure, the X direction is referred to as “the vertical direction of the casing 3”, the Y direction is referred to as “the lateral width direction of the casing 3”, and the Z direction is referred to as “the longitudinal direction of the casing 3”.

  The casing 3 is formed in a rectangular parallelepiped shape with the hollow space in the inside as a storage location of the detection unit 2, and as shown in FIGS. 2 to 4, a first covering portion 3 a that covers the front side (front side) of the storage location. And a second covering portion 3b covering the side surface side of the storage location and a third covering portion 3c covering the back side (rear side) of the storage location. In this embodiment, each of the first covering portion 3a and the third covering portion 3c is formed in a rectangular shape, and as the second covering portion 3b, a portion covering the upper side, a portion covering the lower side, and a left side Four second covering portions 3b, which are a portion covering the side and a portion covering the right side, are provided. The third covering portion 3c is formed to have a smaller area in a front view (front view) than the first covering portion 3a, and the casing 3 is a third covering portion in the side view than the outer peripheral portion of the first covering portion 3a. The outer peripheral part of 3c is formed in the constriction shape located in the inner side of the casing 3. FIG.

  The casing 3 includes a first case 7 (corresponding to a case) that houses various devices, a first cover 8 that covers a part of the front opening of the first case 7, and a second cover that covers the first cover 8. 9. As shown in FIG. 4, the first case 7 is formed in a rectangular shape in a front view (front view), the front side is an opening, the detection unit 2 is accommodated therein, and a third covering portion 3c and four second covering portions 3b are formed. The first cover 8 and the second cover 9 are provided in the front opening of the first case 7, and the first cover portion 3 a is configured by covering the entire opening of the first case 7 with the second cover 9. doing.

  The detection unit 2 detects, for example, smoke generated by fire, temperature rise, CO gas generated by incomplete combustion, leaked gas generated by gas leaks such as city gas, and the like. If possible, various detection units can be applied, and the number of the detection units 2 can be changed as appropriate. In this embodiment, the detection unit 2 includes three detection units, for example, a first detection unit 2a that detects smoke, a second detection unit 2b that detects CO gas, and a third detection unit 2c that detects leakage gas. It has been.

  The detection unit 2 detects a detection target from air flowing into the casing 3 from the outside of the casing 3, and the casing 3 is provided with an inflow unit 10 that can flow the air into the casing 3. . The inflow portion 10 includes openings provided in each of the four second covering portions 3b, and air flows into the casing 3 from the outside of the casing 3 over the entire circumference of the side surface portion of the casing 3. . As shown in FIG. 1, the first case 7 of the casing 3 is provided with column portions 7 a extending in the front-rear direction (Z direction) at each of the four corners in a front view (front view), and between the column portions 7 a. The opening part formed in is used as the inflow part 10. Thus, in the circumferential direction of the casing 3, the column portions 7 a only exist at the four corners of the casing 3, and the inflow portion 10 having a large opening area can be provided over the entire circumference of the side surface portion of the casing 3. The air can be effectively introduced into the casing 3.

  The inflow portion 10 includes an intermediate column portion 12 that extends in the front-rear direction (Z direction) and a plate-shaped partition portion 11 that extends in a direction orthogonal to the front-rear direction (Z direction). Thereby, the opening part between pillar part 7a is divided by the intermediate | middle pillar part 12 and the division part 11, and it prevents that a foreign material, a user's hand, etc. are inserted in the inside of the casing 3 accidentally. . Moreover, the strength of the casing 3 is reinforced by providing the intermediate column portion 12.

  In the casing 3, as shown in FIG. 4, in addition to the detection unit 2, the battery 1 as a power supply unit, the detection operation of the detection unit 2 and the control of the alarm operation according to the detection status, A substrate 13 (see FIG. 5) having a control circuit for performing various controls such as on / off control of power supply, a speaker unit 14 for giving an alarm by voice or the like, and a lamp unit 15 for giving an alarm by lighting display or the like (FIG. 5). 5) and the power display 16 are housed.

  As for the arrangement position of each device, as shown in FIG. 4, when viewed from the front, the battery 1 is arranged on the upper left side, the first detection unit 2a is arranged on the lower side of the battery 1, and the power display unit 16 is on the lower left side. It is arranged at the end. The speaker unit 14 is disposed on the upper right side, the second detection unit 2b is disposed on the lower side of the speaker unit 14, and the third detection unit 2c is disposed on the lower side of the second detection unit 2b. As shown in FIG. 5, the substrate 13 is attached so as to cover the first detection unit 2 a housed in the first case 7.

  In this detector, as described above, the inflow portion 10 is formed over the entire circumference of the side surface portion of the casing 3, and air flows into the casing 3 over the entire circumference of the side surface portion of the casing 3. The flow of the inflowing air is circulated over the entire circumference of the side surface of the casing 3 with respect to the detection unit 2 (first detection unit 2a) without being obstructed by other devices.

A description will be given of the flow of air to the first detector 2a.
As shown in FIG. 4, the first detection unit 2 a is arranged on the lower left side in a front view, and the other is between the first detection unit 2 a and the inflow portions 10 b and 10 c on the lower side surface side and the left side surface side. There is no equipment. Therefore, as shown by the arrows in FIGS. 2 and 3, the air flowing in from the inflow portion 10 c on the left side surface and the air flowing in from the inflow portion 10 b on the lower side surface are flowed by other devices. It can be distributed to the first detector 2a without being obstructed.

  As shown in FIG. 4, a second detection unit 2b and a third detection unit 2c are arranged between the first detection unit 2a and the inflow portion 10d on the right side surface. The second detection unit 2b and the third detection unit 2c are stored in a single storage unit in a state of being arranged in the vertical direction (X direction), and on the opening side of the first case 7 as shown in FIGS. It is arranged on the front side of a certain casing 3. Thereby, as shown by the arrow in FIG. 3, a space is formed between the second detection unit 2b and the third detection unit 2c and the third covering portion 3c of the casing 3, and the inflow portion on the right side through the space. By flowing the air flowing in from 10d to the first detection unit 2a, the air flows to the first detection unit 2a without being blocked by the second detection unit 2b and the third detection unit 2c. Can be made.

  As shown in FIG. 4, the battery 1 is disposed between the first detection unit 2 a and the inflow portion 10 a on the upper side surface. As shown in FIG. 2, the battery 1 is disposed on the front side of the casing 3 that is the opening side of the first case 7. Thereby, as shown by the arrow in FIG. 2, a space is formed between the battery 1 and the third covering portion 3 c of the casing 3, and the air flowing from the inflow portion 10 a on the upper side surface through this space is the first. By allowing the air to flow through the detection unit 2a, the air can be passed through the first detection unit 2a without being obstructed by the battery 1. Thus, by arranging the battery 1 so as to protrude from the front side of the casing 3 relative to the first detection unit 2a, a sufficient air circulation space can be secured on the rear side of the battery 1 and flows from the inflow part 10d. Air is circulated to the first detection unit 2a without being obstructed by the battery 1.

  As described above, by disposing each device stored in the first case 7 in the front-rear direction (Z direction) of the casing 3, the first detection unit 2a is disturbed by other devices. The air can be circulated over the entire circumference of the side surface of the casing 3 without any problem. In particular, since the battery 1 is larger in the front-rear direction (Z direction) of the casing 3 than the speaker unit 14, the battery 1 is disposed on the front side of the casing 3, and the third covering portion of the battery 1 and the casing 3 is arranged. By securing the air circulation space between the first detector 2a and the third detector 3c, the air can be properly distributed to the first detector 2a, and the detection performance as a detector can be effectively improved. In addition, it is not necessary to form an air flow passage that bypasses the battery 1 and distributes the air to the first detection unit 2a, the size of the casing 3 in the front-rear direction (Z direction) can be reduced, and the casing 3 is compact. Can also be achieved.

  Air can be appropriately distributed not only to the first detection unit 2a but also to the second detection unit 2b and the third detection unit 2c. That is, as shown in FIG. 4, the second detection unit 2b and the third detection unit 2c are arranged on the lower right side when viewed from the front, and the second detection unit 2b and the third detection unit 2c and the right side surface side. Since there is no other device between the inflow portion 10d, as shown by the arrow in FIG. 3, the air flowing from the inflow portion 10d on the right side is obstructed by the other devices. Without being distributed to the second detector 2b and the third detector 2c.

  As shown in FIGS. 5 and 6, the casing 3 is configured by attaching the first cover 8 and the second cover 9 in this order to the first case 7. The first cover 8 is mounted in a state of covering the entire detection unit installation area of the three detection units 2a, 2b, and 2c housed in the first case 7, and the second cover 9 is in a state of covering the first cover 8 It is installed with. The first cover 8 is mounted in a state in which only the battery 1 among the devices stored in the first case 7 is exposed and covers other devices, and the second cover 9 is provided between the battery 1 and the first cover 8. It is mounted so as to cover the whole. The first cover 8 is formed with a connection opening 8f (see FIGS. 5 and 7) for connecting the battery 1 and the substrate 13 with a connector or the like. The battery 1 and the substrate 13 can be connected through the connection opening 8f. Thus, by removing the second cover 9, the battery 1 can be exposed while other devices are covered by the first cover 8, and the battery 1 can be easily attached and detached when necessary. At the same time, it is possible to prevent accidental contact with other devices such as the substrate 13 during the attaching / detaching operation.

  The first cover 8 is attached to the first case 7 by screwing from the rear side of the casing 3, and the second cover 9 is engaged by a plurality of engaging portions provided in the first case 7. It is mounted by engaging the joint. As a result, the engagement between the engaging portion of the first case second cover 9 and the engaged portion of the first case 7 is released while the first case 7 with the first cover 8 attached is attached to the wall surface. By doing so, the second cover 9 can be removed, and also from this point, the work of attaching and detaching the battery 1 can be simplified.

  As shown in FIGS. 5 and 6, the first cover 8 and the second cover 9 each have a speaker opening 8 a for transmitting sound from the speaker unit 14 to a portion covering the speaker unit 14. 9a is formed. The first cover 8 is configured to be transparent or translucent, and includes a lamp cover portion 8b that covers the lamp unit 15 in a state where the light of the lamp unit 15 is transmitted. The second cover 9 is provided with a lamp opening 9b (corresponding to the lamp portion exposed portion) for exposing the lamp cover portion 8b of the first cover 8 to the outside, and the display content of the lamp portion 15 is visually recognized from the outside. be able to.

  As shown in FIG. 5, two sets of the lamp portions 15 are provided with a gap in the vertical direction of the casing 3, with three sets arranged in the width direction of the casing 3 as one set. Two lamp cover portions 8b of the first cover 8 are provided at intervals in the vertical direction of the casing 3 so as to correspond to the two sets of lamp portions 15 with intervals in the vertical direction of the casing 3. . As shown in FIGS. 2, 7, 8, and 10, the lamp cover portion 8b includes a first protruding portion 8c that protrudes toward the first case 7 (the rear surface side of the casing 3) and a second cover 9 side (the casing). 3d front surface side) and a second protruding portion 8d. In FIG. 2, the lamp portion 15 is omitted. As shown in FIGS. 7 and 10, the first projecting portion 8c is formed in a mountain shape that becomes narrower toward the first case 7 side (the rear surface side of the casing 3), as shown in FIG. 10B. Further, three are provided at intervals in the lateral width direction of the casing 3 corresponding to each of the three lamp portions 15. 8 d of 2nd protrusion parts are formed in the mountain shape which protrudes in series over the full length of the arrangement | positioning location of the three lamp parts 15 in the width direction of the casing 3. As shown in FIG. Since the first projecting portion 8c is spaced apart in the lateral width direction of the casing 3, the light of each lamp portion 15 travels while reflecting in the corresponding first projecting portion 8c, and the second projecting portion on the upper side thereof. It passes through 8d and reaches the outside. Thereby, the light of the three lamp parts 15 in each group reaches the outside without being mixed with the light of the lamp parts 15 adjacent in the lateral width direction of the casing 3.

  As shown in FIG. 10A, a light shielding portion 21 is provided between the lamp cover portions 8 b of the first cover 8, and the light of the pair of lamp portions 15 positioned on the upper side in the vertical direction of the casing 3. And the light of the pair of lamp portions 15 located on the lower side are prevented from mixing with each other. The light shielding portion 21 includes a recessed groove portion 8 e formed on the first cover 8 and a projection portion 9 e formed on the second cover 9. As shown in FIGS. 7, 8, and 10, the recessed groove portion 8 e is formed between the lamp cover portions 8 b and is first across the entire length of the portion where the lamp cover portion 8 b is formed in the lateral width direction of the casing 3. It is formed in a shape that is recessed into the case side (the rear surface side of the casing 3). The recessed groove 8e is recessed on the first case side (the rear surface side of the casing 3) so as to be equal to or larger than the protruding amount of the first protruding portion 8c of the lamp cover portion 8b. As shown in FIGS. 8 and 10, the protruding portion 9 e is provided on the rear surface side of the second cover 9 and is formed in a plate shape protruding toward the first case side (rear surface side of the casing 3). The second cover 9 is configured using, for example, a color or material that blocks light, and the protrusion 9e also has a function of blocking light. By attaching the second cover 9, the protrusion 9e fits into the recessed groove 8e and shields light between the lamp cover portions 8b.

  The number and arrangement of the lamp units 15 described above can be changed as appropriate, and the number and shape of the lamp cover portions 8b of the first cover 8 can be changed as appropriate according to the change. Moreover, what kind of color each of the some lamp part 15 lights can be changed suitably. In this embodiment, the group of three lamp units 15 located on the upper side lights up the same color, and the group of three lamp units 15 located on the lower side lights up different colors. In addition to the lamp unit 15 described above, the detector includes a power supply display unit 16. Since the first cover 8 is transparent or translucent, the second cover 9 is provided with a power display opening 9d that exposes a portion of the first cover 8 that covers the power display unit 16 to the outside. The display content of the display unit 16 can be visually recognized from the outside.

  As shown in FIGS. 4 to 6, the detector includes an alarm stop operation unit 20 (operation unit) for stopping the alarm operation when an alarm operation is performed by the speaker unit 14 and the lamp unit 15. Is disposed in the lower central portion in front view. The alarm stop operation unit 20 has a swing axis 20a along the lateral width direction (Y direction) of the casing 3 at its lower end, and is provided so as to be swingable around the swing axis 20a. ing. As shown in FIG. 9, an alarm stop operation unit is provided between the first case 7 and the first cover 8 by attaching the first cover 8 to the first case 7 in which the alarm stop operation unit 20 is accommodated. 20 is supported. The alarm stop operation unit 20 is provided such that the swing axis 20a extends in the lateral width direction of the casing 3, and the extended portion of the swing axis 20a is in contact with the first cover 8. An abutting support portion 8f for supporting is provided. As shown in FIGS. 7 and 9, the abutment support portion 8f is supported by pressing the extended portion of the swing axis 20a from above by attaching the first cover 8. Thus, in a state where the second cover 9 is removed, the alarm stop operation unit 20 is firmly supported by the first case 7 and the first cover 8, and the battery 1 can be easily attached and detached. .

  The second cover 9 is provided with an operation portion opening 9c (corresponding to an operation portion exposed portion) for exposing the alarm stop operation portion 20 from the outside so as to be freely operable. The operation unit 20 for stopping the alarm can be operated.

  This detector performs the detection operation of the detection unit 2 by supplying power from the battery 1, and as shown in FIG. 1, a power switching operation body 17 for switching the power supply from the battery 1 on and off is provided. Is provided. When the control circuit provided on the substrate 13 (see FIG. 5) is turned on by the power supply switching operation body 17, the power supply from the battery 1 is turned on and the detection unit 2 performs the detection operation to switch the power supply. When the operation body 17 is turned off, the power supply from the battery 1 is turned off and the detection operation in the detection unit 2 is stopped.

  As shown in FIG. 6, the power supply switching operation body 17 is disposed in the second covering portion 3 b of the casing 3. The power supply switching operation body 17 is configured to be detachable from the casing 3 and to change the mounting posture with respect to the casing 3 between a first posture and a second posture. In this embodiment, a mounting portion 18 is formed in the second covering portion 3 b on the left side surface side of the casing 3, and the power supply switching operation body 17 is fitted into the casing 3 by fitting the power supply switching operation body 17 into the mounting portion 18. Installing. The power supply switching operation body 17 is removed from the casing 3 by pulling out the power supply switching operation body 17 mounted on the mounting portion 18.

  The first posture and the second posture are postures in which the power supply switching operation body 17 is turned upside down and attached to the casing 3. In the first posture, the upper surface side of the power supply switching operation body 17 is the front surface side of the casing 3. In the second posture, the power switch operating body 17 is mounted in a posture in which the lower surface side is the front surface side of the casing 3.

  The power supply switching operation body 17 is normally mounted on the casing 3 in the first posture, and the power supply from the battery 1 is turned on to perform the detection operation of the detection unit 2. The power supply switching operation body 17 mounted in the first posture is temporarily removed from the casing 3, the power supply switching operation body 17 is turned upside down to change the posture to the second posture, and is mounted on the casing 3 in the second posture. Thus, the power supply from the battery 1 is turned off, and the detection operation of the detection unit 2 is stopped. When the power supply from the battery 1 is turned off, if the speaker unit 14 and the lamp unit 15 are in an alarm operation, the alarm operation is stopped and the power display unit 16 is also turned off. Then, the power supply switching operation body 17 mounted in the second posture is once removed from the casing 3, the power supply switching operation body 17 is turned upside down to change the posture to the first posture, and is mounted on the casing 3 in the first posture. By doing so, the power supply from the battery 1 is turned on, and the detection unit 2 performs the detection operation.

[Another embodiment]
(1) In the above-described embodiment, the light shielding portion 21 is configured by the recessed groove portion 8e of the first cover 8 and the protruding portion 9e of the second cover 9, but for example, simply on the rear surface side of the first cover 8. It is also possible to provide a plate-like protrusion that protrudes toward the first case 7, and to use only the protrusion as a color or material that can shield light, and that protrusion can be used as a light-shielding part.

(2) In the above embodiment, the shapes of the first case 7, the first cover 8, and the second cover 9 can be changed as appropriate, and the first cover 8 covers the detection unit installation area of the detection unit 2. If it is.

(3) In the said embodiment, as a structure of a lamp | ramp part exposure site | part, it is not restricted to what is comprised in an opening part, For example, a lamp | ramp part exposure site | part can also be comprised by making an applicable location transparent or semi-transparent. it can.

(4) In the above embodiment, the battery 1 as the power supply unit is housed in the casing 3. However, for example, a power outlet may be connected to an external power source and supplied with power from the external power source.

1 Power supply (battery)
2 detector 7 first case (case)
8 First cover 8b Lamp cover part 9 Second cover 9b Lamp opening (lamp part exposed part)
9c Operation part opening (operation part exposed part)
20 Alarm stop operation unit (operation unit)
21 Shading part

Claims (5)

  A detector provided with a first cover that covers at least the entire detection unit installation area and a second cover that covers the first cover at an opening of a case that houses a detection unit that detects a detection target.   The case includes a lamp portion, the first cover includes a transparent or translucent lamp cover portion that covers the lamp portion, and the second cover includes the lamp cover of the first cover. The detector according to claim 1, further comprising a lamp exposure part that exposes the part to the outside.   A plurality of the lamp portions are provided at intervals, and the first cover is provided with a plurality of the lamp cover portions at intervals corresponding to each of the plurality of lamp portions. The detector according to claim 2, wherein a light shielding portion is provided between the detectors.   The operation part supported between the said case and the said 1st cover is provided, The operation part exposure site | part which exposes the said operation part freely from the outside is provided in the said 2nd cover. The detector of any one of -3.   In the case, a battery as a power source is housed in the opening side portion of the case, the first cover is attached to the case with the battery exposed, and the second cover covers the battery. The detector according to claim 1, which is mounted in a state.

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