JPH0665899U - Indoor mounted detector - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the detector has to be installed before the indoor construction is completed due to the construction period, the detector itself should be installed in advance because the case is divided into two parts. There is no need, and the work of mounting, removing and connecting the external terminal and the internal terminal is simple and easy, and prevents incorrect connection between different terminals. [Structure] An outer case 4 having external terminals 3 is fitted and fixed in a mounting hole of a ceiling plate. A main body case 8 accommodating the sensor 5, the internal terminals 7, the wiring board 6 and the like is fitted into the outer case 4, and is detachably attached with one touch by engaging the engaging hole and the engaging portion. By this attachment, the internal terminal 7 is electrically and mechanically connected to the external terminal 3. The engagement hole and the engagement portion are formed as a pair, and the sizes thereof are different, so that the main body case 8 is positioned with respect to the outer case 4, and different terminals are prevented from being mistakenly connected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an indoor-mounted detector that is mounted on the ceiling, wall, etc. of buildings such as offices, hotels and hospitals.

[0002]

[Prior art]

 Conventionally, in buildings, etc., various detectors such as temperature / humidity detectors, infrared detectors, and fire detectors are embedded in the ceiling and wall surfaces to control air conditioning and prevent theft and fire. . The most common mounting structure for this type of detector is to fit the case in which the sensor is mounted into a recess in a wall surface, and fix it with fastening means such as a screw (eg, actual flat plate 3). -42544).

[0003]

[Problems to be solved by the device]

 However, in the case of such a conventional detector, if it is necessary to mount the detector before the indoor work is completed during the installation work due to the construction period, the detector may be damaged. Therefore, it was necessary to protect the detector with an appropriate protective member until the indoor construction was completed. In addition, when replacing the detector, it is necessary to remove the detector, disconnect the external cord, then connect the external cord to a new detector and attach it to the wall surface, etc. There was also a problem.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to make the case into a two-part structure so that the indoor work is completed before the completion of the indoor work due to the construction period. Even if there is no choice but to attach the detector to the detector, it is not necessary to attach the detector itself in advance, and it is easy and easy to perform the attaching and detaching work and the connecting work of the external terminal and the internal terminal. An object of the present invention is to provide an indoor-mounted detector that can prevent incorrect connection between terminals.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the first invention comprises an outer case having an external terminal to which an external cord is connected and attached to a wall surface, a ceiling, etc., and a main body case containing a sensor, a circuit board, an internal terminal and the like. The main body case is fitted and inserted into the outer case, and is detachably coupled by engaging means provided on both members so as to electrically and mechanically connect the internal terminal to the external terminal. It is the one. A second invention is the same as the first invention, wherein the engaging means has a positioning function of positioning the main body case with respect to the outer case.

[0006]

[Action]

 In the present invention, the main body case is detachably coupled and fixed to the outer case with one touch by engaging the engaging hole and the engaging portion. At the same time as this coupling and fixing, the internal terminals are electrically and mechanically connected to the external terminals. The engagement hole and the engagement portion position the main body case with respect to the outer case to prevent the internal terminal from being accidentally connected to the external terminal.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. 1 is a sectional view showing an embodiment of the indoor-mounted detector according to the present invention, FIG. 2 is an exploded perspective view of the same detector, FIG. 3 is a plan view of the same detector, and FIG. 4 is IV- of FIG. IV line sectional view, FIG. 5 is a bottom view of the outer case, FIG. 6 is a plan view of the main body case, FIG. 7 is a sectional view showing a mounting structure of the external terminal, and FIG. 8 is a perspective view of the contact spring and the internal terminal. . In these figures, the present embodiment is a ceiling-mounted type that is embedded in the ceiling surface and detects the presence or absence of people in the room by the infrared rays emitted from the human body and controls the temperature and humidity in the room, lighting, etc. In-room detector 1 is shown. Such an in-room detector 1 has a built-in outer case 4 having an external terminal 3 to which an external cord 2 is connected, a sensor 5, a circuit board 6, an internal terminal 7, etc., as shown in FIGS. It is composed of a main body case 8 that is fitted and fixed to the outer case 4, a front cover 9 that covers the lower surface of the outer case 4, and the like, and is fitted and fixed to mounting holes 11 that are provided at appropriate locations on the ceiling plate 10. Further, a box 13 for protecting the external cord 2 from a mouse or the like is capped on the upper end portion of the outer case 4 protruding above the ceiling plate 10.

As shown in FIGS. 3, 4, 7, and 8, the external terminal 3 is composed of a terminal fitting 15, a contact spring 16, and a screw 17 for connecting the external cord 2 to the terminal fitting 15. Has been. The terminal fitting 15 is formed by bending a metal plate having an appropriate plate thickness, width and length by pressing, and has a central portion 15A having two substantially orthogonal slopes 20a and 20b (FIG. 7) and a central portion 15A. The horizontal base portion 15B extends from one end of the portion 15A, and the narrow portions 15C and 15D are provided integrally with the other end of the central portion 15A and the end of the horizontal base portion 15B on the side opposite to the central portion. The narrow portions 15C and 15D are inserted and locked in the locking holes 23 and 24 provided in the outer case 4 from above, respectively. Then, the screw 17 is screwed into the outer slope 20b of the central portion 15A to connect one end of the external cord 2.

The contact spring 16 is formed into a shape as shown in FIG. 8 by bending a thin leaf spring, so that the horizontal plate-shaped base portion 16 a provided at the upper end is a horizontal base portion 15 B of the terminal fitting 15. An elastic holding portion 16b, which is fixed by welding to the lower surface of the same and is bent inward at the lower end side, for elastically holding the internal terminal 7, is provided oppositely. The elastic holding portions 16b are provided in pairs in the height direction so as to elastically hold the internal terminals 7 at four points. In the plate-shaped base portion 16a of the contact spring 16 thus formed, the narrow portions 15C and 15D of the terminal fitting 15 are inserted and locked in the locking holes 23 and 24 of the outer case 4, respectively. And the lower end side of the plate-like base portion 16a absorbs an assembling error between the external terminal 3 and the internal terminal 7, and is separated from the external case 4 by being closely contacted with a pedestal 25 protruding from the upper surface of the external case 4. The outer case 4 is swingable in the radial direction.

The outer case 4 is integrally formed by injection molding of a resin, and includes a cylindrical main body 4A having an open lower surface and a collar portion 4B protruding from the outer peripheral surface of the lower end portion of the main body 4A. The flange portion 4B is closely attached to the indoor side surface 10a of the ceiling plate 10 via a packing 27, and is connected to the lower surface of the box 13 by a pair of screws 28. For this reason, a pair of screw mounting holes 29 (FIGS. 2 and 3) having a keyhole shape are formed in the collar portion 4B with a phase difference of 180 °. On the other hand, on the upper surface of the outer case 4, a pair of engaging holes 30 and 31 (FIG. 5), and a long hole 32 and an external terminal attachment portion 33 (FIG. 2, FIG. 3, FIG. 4, FIG. 5) is formed.

The engagement holes 30 and 31 are for locking the main body case 8 and are formed with a phase difference of 180 ° from each other, and each have a hook shape in a plan view, so that the outer case 4 has a center direction. The radial hole portions 30a and 31a facing toward and the circumferential hole portions 30b and 31b communicating with the inner ends of the radial hole portions 30a and 31a. Three long holes 32 are formed in the circumferential direction at a predetermined interval in the circumferential direction between the engagement holes 30 and 31, respectively.

As shown in FIGS. 2 and 3, the external terminal mounting portion 33 is composed of a pair of mounting walls 33 a and 33 b that are arranged in parallel at a constant interval in the circumferential direction. On the inner side surfaces of the mounting walls 33a and 33b, support portions 34 that support both sides of the lower surface of the central portion 15A of the terminal fitting 15 are integrally projected. The external terminal mounting portions 33 are arranged so as to face each other with three imaginary lines 35 (FIGS. 3 and 5) passing through the center of the outer case 4 and connecting the pair of engaging holes 30 and 31 therebetween. And the three external terminal attachment portions 33 on the same side are provided in close contact with each other.

As shown in FIGS. 1, 2, 4, and 6, the main body case 8 has a cylindrical main body portion 8A having an open lower surface to be fitted into the main body 4A of the outer case 4, and a main body portion 8A. When the main body 8A is correctly inserted into the outer case 4, the upper surface of the flange 8B comes into close contact with the lower surface of the flange 4B of the outer case 4. It is configured to be touched. A drainage mountain 37 (FIG. 1), which is an annular protrusion having a V-shaped cross section, is integrally provided at the center of the lower surface of the collar portion 8B.

On the upper surface of the main body case 8, the internal terminals 7 are provided so as to penetrate therethrough, and a pair of engaging portions 40, 41 are integrally projected. The internal terminals 7 are provided so as to project corresponding to the external terminals 3 of the outer case 4, and are formed integrally with the body case 8 by insert molding. The engaging portions 40 and 41 are provided so as to project corresponding to the engaging holes 30 and 31 of the outer case 4, and are formed in an inverted L shape in a side view as shown in FIGS. 1 and 2. As a result, the vertical bases 40a and 41a and the horizontal bases 40b and 41b extending outward at the upper ends of the vertical bases 40a 1 and 41a are formed. When the main body case 8 is fitted into the outer case 4, When the main body case 8 is rotated clockwise in FIG. 5 while being inserted into the radial holes 30 a, 31 a of the fitting holes 30, 31 as shown by the two-dot chain line in FIG. 5, in this state, the vertical base 40 a , 41a move to the circumferential holes 30b, 31b and the horizontal portions 40b, 41b abut on and engage with the upper surface of the outer case 4, so that the main body case 8 is detachably fixed to the outer case 4.

In this case, when the main body case 8 is rotated 180 ° and fitted into the outer case 4, the different external terminals 3 and internal terminals 7 are connected to each other, the electric circuit is damaged, and the normal functioning as a detector is achieved. Therefore, the radial holes 30a and 31a of the engaging holes 30 and 31 and the engaging portions 40 and 41 may have different shapes, so that the radial hole 30a and the engaging portion 40 can be fitted to each other. In the trapezoid, the radial hole portion 31a and the engaging portion 41 are similarly formed into rectangular shapes that can be fitted to each other so that the engaging portion 40 does not fit into the radial hole portion 31a.

Further, when the horizontal portions 40b and 41b of the engaging portions 40 and 41 are respectively inserted into the radial hole portions 30a and 31a of the engaging holes 30 and 31 as shown by the two-dot chain line in FIG. The internal terminals 7 are inserted into the corresponding long holes 32 from below and project above the outer case 4, and by rotating the body case 8 in the clockwise direction, the projecting portions are contacted as shown in FIGS. 4 and 8. The spring 16 is inserted between the elastic holding portions 16b and contacts at four points, whereby the external terminal 3 and the internal terminal 7 are electrically and mechanically connected. Therefore, the attachment work of the main body case 8 to the outer case 4 and the electrical and mechanical connection work of the external terminal 3 and the internal terminal 7 are simultaneously performed with one touch.

As shown in FIGS. 1 and 4, the wiring board housed and arranged in the main body case 8 is composed of two wiring boards 6 A and 6 B which are arranged above and below to be spaced apart from each other, and are located above the wiring boards 6 A and 6 B. The wiring board 6A has a land portion of a printed wiring pattern around both sides of the mounting screw hole, and the land portion is brought into contact with the lower surface of each internal terminal 7 and screwed and fixed by the set screw 45. Are electrically connected to each internal terminal 7. On the other hand, the wiring board 6B located below is fixed together with a lens holder 47, which will be described later, by a set screw 48 to the lower surfaces of a pair of screw mounting portions 46 projectingly provided on the inner peripheral surface of the main body case 8, and the lead wire. The wiring board 6 is electrically connected to the wiring board 6A located above. Further, an infrared sensor 5 for detecting infrared rays emitted from a person in the room is arranged in the lower center of the lower surface of the wiring board 6B.

The lens holder 47 is formed in a tubular body with both ends open, and a pair of screw mounting portions 50 each having a screw mounting hole through which the set screw 48 is inserted are provided on the inner side surface of the upper end side opening. The lens 51 formed of resin in a dish shape is fitted and fixed in the opening on the lower end side. The lens 51 is made of a Fresnel lens, and the outer peripheral edge portion thereof is in close contact with the step surface 52 (FIG. 4) provided on the lower portion of the inner peripheral surface of the lens holder 47, and is also provided on the lower portion of the inner peripheral surface of the lens holder 47. For example, it is fixed to the step surface 52 by four engaging claws 53 (FIGS. 1 and 4), which uniquely determines the distance from the infrared sensor 5 and accurately positions the sensor 5 at the focal position of the lens 52. Can be installed.

Since the front cover 9 is formed in a shallow dish shape, a disk portion 9A covering the lower surfaces of the outer case 4 and the main body case 8 and a cylinder protruding from the outer periphery of the disk portion 9A. An opening 54 larger than the inner diameter of the main body case 8 and smaller than the outer diameter of the collar portion 8B is formed in the center of the disc portion 9A, and the cylindrical portion 9B is formed on the collar portion 4B of the outer case 4. It is designed to be fitted to the outer peripheral surface. Further, on the inner surface of the disc portion 9A, around the opening portion 54, the front cover 9 is locked to the collar portion 8B of the main body case 8, for example, four engaging claws 55 (FIGS. 2 and 4) are provided. A cover 56 is integrally provided so as to project, and a cover 56 that hermetically covers the opening 54 is provided. The cover 56 is formed in a dish shape with polyester resin or the like, the central portion is fitted into the opening portion 54 from above, the outer peripheral portion is brought into close contact with the inner peripheral portion of the inner surface of the disc portion 9A, and the main body is provided thereon. The collar portion 8B of the case 8 is placed via the ring-shaped cover packing 57. The cover packing 57 has an outer diameter larger than the outer diameter of the cover 56 and an inner diameter slightly smaller than the outer diameter of the cover 56, so that the inner surface of the disk portion 9A of the front cover 9 and the rear surface of the outer peripheral portion of the cover 56 are covered. They are in close contact with each other and are compressed when the front cover 9 is attached to the main body case 8 to hermetically seal the gap between the opening 54 and the cover 56 and the gap between the inner surface of the disc portion 9A and the cover 56.

In FIG. 1, the box 13 is called a JIS box, and its size, material, etc. are defined by JIS, and has an opening 60 at the center of the lower surface into which the outer case 4 is inserted. A screw hole 61 1 into which the above-described screw 28 is screwed is formed in the periphery.

9 and 10 are a sectional view and an exploded perspective view showing another embodiment in which the outer case 4 is attached to the ceiling plate 10 without using the box 13 and the screw 28. In this embodiment, a terminal cover 70 is detachably fitted and fixed to the upper surface of the outer case 4, and an upper end of a mounting screw 71 provided penetrating the outer case 4 and the terminal cover 70 protrudes above the terminal cover 70. A mounting bracket 72 is screwed to the portion, and the mounting bracket 72 is brought into contact with the ceiling back side surface 10b of the ceiling plate 10 so that the flange portion 4B of the outer case 4 is closely fixed to the indoor side surface 10a of the ceiling plate 10. It is composed.

The terminal cover 70 is formed in a cylindrical shape having an outer diameter substantially the same as that of the outer case 4 and an opened lower surface, and a pair of engaging claws 74 are integrally formed on the lower end surface by 180 ° in the circumferential direction. The engaging claws 74 are provided so as to project, and are engaged with engaging recesses 75 formed on the outer peripheral surface of the upper end of the outer case 4. In this case, the positioning of the terminal cover 70 with respect to the outer case 4 is not required to be strict, and therefore, the engaging recesses 75 are evenly arranged on the outer circumference of the outer case 4 to form, for example, six. Any two engaging recesses that are offset by 180 ° and face each other serve to lock the terminal cover 70. A pair of external cord lead-out holes 76 are formed in the terminal cover 70. The external cord lead-out hole 76 includes a round hole portion 76a formed on the upper surface of the terminal cover 70, and a slit portion 76b formed over the entire length in the circumferential surface height direction and communicating with the round hole portion 76a.

The mounting bracket 72 includes a highly rigid metal plate 77 having a screw hole 77 a (FIG. 10) into which the mounting screw 71 is screwed, and a plate spring 78 fixed to the lower surface of the metal plate 77. It is configured. The leaf spring 78 includes a pair of left and right open / close legs 78a and 78b and a connecting portion 78c that connects the upper ends of the open / close legs 78a and 78b by being bent and formed in a downward U-shape when viewed from the front. The portion 78c is locked to the lower surface of the metal plate 77, and the opening / closing legs 78a and 78b are slidably inserted into guide holes 79a and 79b provided at the upper end of the outer peripheral surface of the terminal cover 70, respectively. Further, the open / close legs 78a, 78b have a bent portion 80 which is bent inward in a V-shape in the middle portion in the height direction, and when the open / close legs 78a, 78b are moved up and down by a mounting screw 71, the bent portion 80 of the terminal cover 70 is moved. It is configured to come into contact with and separate from the inclined portion 81 provided on the outer peripheral surface, and thereby to be opened and closed. That is, a leaf spring 78 having a habit of closing the legs is used, and when the leaf spring 78 is moved to the upper end by the mounting screw 71, the bent portion 80 causes the bent portion 80 to move as shown by the two-dot chain line in FIG. Since it is located above, the open / close legs 78a, 78b maintain the closed state. The interval between the bent portions 80 in this closed leg state is smaller than the outer diameter of the terminal cover 70. Now, as shown by the chain double-dashed line, when the mounting bracket 71 is located above the mounting screw 71 and the mounting screw 71 is rotated to move the mounting bracket 72 downward, the bent portion of the leaf spring 78 is bent. The opening / closing legs 78a and 78b are gradually opened because 80 contacts the inclined portion 81 of the terminal cover 70. Then, when the mounting bracket 72 descends by a certain distance, the lower end of the leaf spring 78 abuts against the ceiling back side surface 10b of the ceiling plate 10 and presses the flange portion 4B of the outer case 4 against the indoor side surface 10a of the ceiling plate 10. Therefore, the flange portion 4B of the outer case 4 and the leaf spring 78 hold the ceiling plate 10 and thereby securely fix the outer case 4 to the ceiling plate 10. When the outer case 4 is to be removed, the mounting bracket 72 is moved upward by the mounting screw 71, and the open / close legs 78a and 78b of the leaf spring 78 are closed, so that the outer case 4 can be easily removed from the ceiling plate 10. . The leaf spring 78 is not limited to the one having the habit of closing the leg, and may be the one having the habit of opening the leg. In that case, the guide holes 79a and 79b are used instead of the inclined portion 81 described above. Then, the open / close legs 78a and 78b are closed.

With such a configuration, the work of attaching the outer case 4 to the ceiling plate 10 is simpler and easier than the case where the outer case 4 is fixed using the box 13. That is, since the box 13 has an outer diameter larger than that of the mounting hole 11 of the ceiling board 10 as shown in FIG. 1, the box 13 is previously arranged above the ceiling board 10 and the screw 28 is attached to the outer case 4. It is necessary to insert it into the screw mounting hole 29 provided in the collar portion 4B and screw it into the screw hole 61 of the box 13. However, the operation of screwing the screw 28 into the screw hole 61 of the box 13 is troublesome because the hole position cannot be visually recognized. On the other hand, in the case of the mounting bracket 72, the leaf spring 78 is opened / closed by the rotating operation of the attachment screw 71 and is brought into contact with or separated from the ceiling plate 10. Therefore, even if the open / closed state of the leaf spring 78 cannot be visually recognized, the outer case 4 can be securely fixed.

Thus, in the ceiling-mounted detector 1 having such a structure, the outer case 4 attached to the ceiling plate 10 and the main body case detachably attached to the outer case 4 for storing and holding the sensor 5 and the like. Since it is a two-part configuration with 8, the outer case 4 only needs to be attached even if the detector has to be attached before the indoor construction is completed due to the construction period. Since the main body case 8 can be incorporated into the outer case 4 after the completion of the indoor work, there is no fear of damaging the detector. Further, since the main body case 8 is detachably attached to the outer case 4 by engaging the engagement holes 30, 31 and the engaging portions 40, 41 with one touch, the work of attaching the main body case 8 is simple and easy. is there. Furthermore, when the main body case 8 is incorporated into the outer case 4, the external terminal 3 and the internal terminal 7 are automatically connected, so that the connecting work of these terminals is unnecessary and the assembling work is further facilitated. In addition, the engaging portion 40 is similar in shape to the engaging hole 30 and has a different shape from the engaging hole 31, and cannot be fitted into the engaging hole 31. Even if the external terminal 3 and the internal terminal 7 are fitted in the case 4, it is possible to reliably prevent erroneous connection between the external terminal 3 and the internal terminal 7. Further, in the present invention, since the outer case 4 is formed into a cylindrical body and embedded in the ceiling plate, the amount of protrusion to the inside can be significantly reduced, and the appearance is good. .

FIG. 11 is a sectional view showing another embodiment of the present invention. In this embodiment, a pair of magnets 90, 91, 92, 93 are arranged on the inner bottom surface of the outer case 4 and the rear surface of the main body case 8, respectively, and the coupling means is constituted by these magnets. Of the pair of magnets 90, 91 arranged on the outer case 4 side, the magnet 90 is arranged with the N pole facing the case front side and the S pole facing the case rear side. On the side, the N pole is disposed with the case rearward. Similarly, of the pair of magnets 92, 93 arranged on the main body case 8 side, the magnet 92 is arranged so that the N pole faces the front side of the case and the S pole faces the rear side of the case. The poles are arranged on the front side of the case and the N poles are arranged on the rear side of the case. When the body case 8 is fitted into the outer case 4 with the magnet 92 facing the magnet 90 and the magnet 93 facing the magnet 91, the magnets come into close contact with each other due to the magnetic force, so that the body case 8 is fixed in the outer case 4. On the contrary, when the magnet 9 faces the magnet 91 and the magnet 93 faces the magnet 90, the main body case 8 cannot be fixed by the repulsive force between these magnets. Insertion can be prevented.

Although the above embodiment has been described with respect to the case where the present invention is applied to the occupancy detector 1, the present invention is not limited to this, and various changes and modifications can be made. It is possible to provide 30, 31 on the main body case 8 and provide the engaging portions 40, 41 on the outer case 4. Further, the engaging means can be variously changed and modified, and for example, a spring clip, a quick fastener or the like may be used. Further, the present invention can be applied not only to the in-room detector, but also to a temperature / humidity detector, a fire detector, an intrusion detector, and the like, and a plurality of different sensors are housed and arranged in the main body case 8 to be combined. It can also be used as a mold detector.

[0028]

[Effect of device]

 As described above, the indoor-mounted detector according to the present invention includes the outer case attached to the ceiling or the wall surface, and the main body case fitted and inserted in the outer case. Since it is configured so that it can be attached to the outer case, the main body base can be detachably attached to the outer case with one touch, and the work of attaching the main body case is simple and easy. Further, since the internal terminal and the external terminal are electrically and mechanically connected to each other at the same time as the mounting of the main body case, the connecting work of these terminals is unnecessary and the mounting work is further facilitated. Furthermore, since the external cord and the external terminal can be left connected during the installation of the main body case, the maintenance of the sensor, the inspection and replacement work, etc., the workability is excellent. Since a wrong connection prevention function is added to the children, there is no danger of the different terminals coming into contact with each other and damaging the detection circuit.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an indoor-mounted detector according to the present invention.

FIG. 2 is an exploded perspective view of the detector.

FIG. 3 is a plan view of the detector.

4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a bottom view of the outer case.

FIG. 6 is a plan view of a main body case.

FIG. 7 is a cross-sectional view showing a mounting structure of external terminals.

FIG. 8 is a perspective view of a contact spring and an internal terminal.

FIG. 9 is a cross-sectional view showing another embodiment of the present invention.

FIG. 10 is a perspective view of a terminal cover and a mounting bracket.

FIG. 11 is a cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1 In-room detector 2 External cord 3 External terminal 4 Outer case 5 Sensor 6 Circuit board 7 Internal terminal 8 Main body case 9 Front cover 10 Ceiling plate 30,31 Engagement hole 40,41 Engagement part

Claims (2)

[Scope of utility model registration request] 1. An outer case attached to a wall surface, a ceiling or the like having an external terminal to which an external cord is connected, a sensor,
It is equipped with a main body case that contains a circuit board, internal terminals, etc.
This main body case is fitted into the outer case,
An indoor-mounted detector characterized in that the internal terminals are electrically and mechanically connected to the external terminals by being detachably coupled by engaging means provided on both members. 2. The indoor-mounted detector according to claim 1, wherein the engagement means has a positioning function of positioning the main body case with respect to the outer case, and prevents erroneous connection between the external terminal and the internal terminal. A feature of indoor-mounted detectors.