JPH0669772U - Indoor mounted detector - Google Patents

Abstract

(57) [Abstract] [Purpose] Wiring check work can be performed easily and the check time required for each detector is shortened. [Structure] An outer case 5 having an external terminal 15 to which an external cord 20 is connected is embedded and installed in a ceiling. The outer case 5 houses and arranges the sensor, the circuit board, the internal terminals, and the like, and the detector 3 is constituted by these.
Wiring checker 7 equipped with terminal portion 72 at the time of wiring check
When 0 is inserted and arranged in the outer case 5 instead of the inner case,
When the rear end of the terminal portion 72 is connected to the external terminal 15 and the front end is connected to a tester or a measuring instrument, the external terminal 15 and the external cord 20 can be connected without removing the outer case 5 from the ceiling.
You can check the connection status of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a room-mounted detector that is embedded and installed in the ceiling, wall surface, etc. of buildings such as offices 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 provided in the wall surface, and fix it with fastening means such as screws. No. 54550). As another method, a mounting device disclosed in, for example, Japanese Utility Model Publication No. 3-42544 is also known. In this mounting device, a mounting bracket bent in a V shape is mounted on the back side of the case body so that it can be raised and lowered with a set screw, and the mounting surface of the ceiling plate, etc. is secured by this mounting bracket and the flange part provided on the front side of the case body. The case body is configured to be fixed by sandwiching it.

[0003]

[Problems to be solved by the device]

 However, in all of the conventional detectors mentioned above, the terminals to which the external cords are connected are provided inside or on the back of the case. Or it has to be removed from the ceiling and connected to a terminal such as a tester or other measuring equipment, which makes the wiring check process troublesome and time-consuming. There was also the problem that the reattachment work of the detector after the wiring check was troublesome and troublesome.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to enable a wiring check work to be performed easily and quickly, and for each detector. An object of the present invention is to provide an indoor-mounted detector that can shorten the working time.

[0005]

[Means for Solving the Problems]

 To achieve the above object, the present invention has an outer case having an external terminal to which an external cord is connected and fitted and fixed in a mounting hole provided on a wall surface, a ceiling, etc., a sensor, a circuit board, and an internal terminal. The wiring checker is provided with an inner case that houses the above-mentioned components and is housed in the outer case, and a wiring checker. The wiring checker includes a case, a check terminal accommodated in the case, and a check terminal from the chamber of the case. And a conductive member led out inward, and the case is fitted into an outer case instead of the inner case to electrically connect the check terminal to the outer terminal.

[0006]

[Action]

 In the present invention, the check terminal can be connected to the external terminal by removing the inner case from the outer case and storing and arranging the wiring checker in the outer case instead. Therefore, it is not necessary to remove the outer case itself from the wall surface, the ceiling or the like. By connecting a tester or measuring device to the conductive member led out from the check terminal, the connection status of the external code and external terminal can be checked.

[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 an indoor-mounted detector according to the present invention, FIG. 2 is an exploded perspective view of the same detector, FIG. 3 is a rear view of an outer case, and FIG. 4 is IV-IV of FIG. FIG. 5 is a front view of the outer case, FIG. 6 is a rear view of the inner case, FIG. 7 is a cross-sectional view showing the mounting structure of the external terminal, FIG. 8 is a perspective view of the contact spring and the internal terminal, and FIG. FIG. 10 is a partially broken exploded perspective view of the wiring checker, and FIG. In these drawings, the present embodiment is inserted and arranged in a mounting hole 2 provided in a ceiling plate 1 and detects the presence or absence of an occupant by detecting infrared rays radiated from a human body or the like, thereby detecting the temperature and humidity in the room. The case where the present invention is applied to the ceiling-mounted occupancy detector 3 that controls control and lighting, etc. is shown. As shown in FIGS. 1 and 2, such an in-room detector 3 includes an outer case 5 formed in two parts, a terminal cover 6 detachably attached to the back surface of the outer case 5, and an outer case 5. It has an inner case 7 that is inserted and arranged, a front cover 8 that is detachably attached to the front surface of the inner case 7, and the like.

The outer case 5 is integrally formed by injection molding of resin, and has a cylindrical main body 5 A having an outer diameter smaller than the hole diameter of the mounting hole 2 and a front surface opened, and the main body 5 A flange portion 5B is provided so as to project from the outer peripheral surface of the front end portion of A and is brought into close contact with the indoor side surface 1a of the ceiling plate 1 through a packing 9, and a pair of engagement holes 10 and 11 (see FIG. ), A screw mounting hole 12 (FIGS. 1 to 5), six elongated holes 13 (FIG. 5), and an external terminal mounting portion 14 (FIGS. 2 to 4), respectively.

In FIG. 5, since the pair of engagement holes 10 and 11 lock the inner case 7, they are formed with a phase difference of 180 ° from each other, and each of them has a hook shape in a plan view. The case 5 includes radial holes 10a and 11a directed toward the center, and circumferential holes 10b and 11b connected to the inner ends of the radial holes 10a and 11a.

The screw mounting hole 12 (FIGS. 1 to 5) is formed in the center of the rear surface of the outer case 5, and a mounting screw 27 described later is rotatably penetrated from the inside of the outer case 5. Has been done.

The elongated holes 13 are formed long in the circumferential direction at predetermined intervals in the circumferential direction, three each between the engaging holes 10 and 11.

The external terminal mounting portion 14 is mainly composed of a pair of mounting walls 14a and 14b that are arranged in parallel with each other at regular intervals in the circumferential direction, as shown in FIGS. On the inner side surfaces of these mounting walls 14a and 14b, support portions 17 for supporting the terminal fittings 16 of the external terminals 15 are integrally provided so as to project. Then, the external terminal mounting portions 14 are arranged so as to face each other with three imaginary lines 18 (FIGS. 3 and 5) passing through the center of the outer case 5 and connecting the pair of engagement holes 10 and 11 on both sides. In addition, the three external terminal mounting portions 14 on the same side are provided in close contact with each other.

As shown in FIGS. 3, 4, 7, and 8, the external terminal 15 is composed of the terminal fitting 16, a contact spring 19, and a screw 21 for connecting the external cord 20 to the terminal fitting 16. Has been done. The terminal fitting 16 is formed by bending a metal plate having an appropriate plate thickness, width, and length by bending, and has a central portion 16A having two substantially orthogonal slopes 22a and 22b (FIG. 7) and a central portion 16A. 16A includes a horizontal base portion 16B extending from one end, and narrow portions 16C and 16D integrally extending from the other end of the central portion 16A and the end of the horizontal base portion 16B opposite to the central portion. , 16D are inserted and locked from the rear into locking holes 23, 24 provided in the outer case 5, respectively. Then, the screw 21 is screwed into a screw hole formed in the outer slope 22b of the central portion 16A, and one end of the external cord 20 is connected and fixed.

In FIGS. 7 and 8, the contact spring 19 is formed into a shape as shown by bending a thin leaf spring, so that the contact point spring 19 has a plate-shaped base portion 19a and a portion forward of one end of the plate-shaped base portion 19a. An elastically deformable portion 19b bent substantially at a right angle, a bent portion 19c bent substantially at a right angle from the end of the elastically deformable portion 19b opposite to the plate-shaped base portion, and a bent portion 19c. A U-shaped terminal receiving portion 19d provided on the front side of the curved portion 19c so as to surround the three sides, and an internal terminal 25, which will be described later, formed by bending the ends of the opposite two sides of the terminal receiving portion 19d inward. And a pair of holding portions 19e that elastically hold four points, and a plate-shaped base portion 19a is welded and fixed to the front surface of the horizontal base portion 16B of the terminal fitting 16. Each holding portion 19e is composed of a pair of elastic pieces 119 provided in the front-rear direction with a space therebetween. In the plate-shaped base portion 19a of the contact spring 19 thus formed, when the narrow portions 16C and 16D of the terminal fitting 16 are inserted and locked in the locking holes 23 and 24 of the outer case 5, respectively. The elastically deformable portion 19b, the bent portion 19c, and the terminal receiving portion 19d, which are closely fixed to the pedestal 26 protrudingly provided on the back surface of the outer case 5 and continuous with the plate-shaped base portion 19a, are separated from the outer case 5. The elastic deformation portion 19b is configured to elastically deform in the plate thickness direction in order to absorb an assembly error when the contact spring 19 and the internal terminal 25 are connected.

In FIGS. 1 and 2, the terminal cover 6 is formed in a cylindrical shape having an outer diameter substantially the same as that of the outer case 5 and an open front surface. Engaging claws 28 are integrally projected, and these engaging claws 28 are engaged with engaging recesses 29 formed at the rear end of the outer peripheral surface of the outer case 5. In this case, the positioning of the terminal cover 6 with respect to the outer case 5 is not required to be strict, and therefore, the engaging recesses 29 are evenly arranged in the circumferential direction of the outer case 5 to form, for example, six, of which 180 ° are shifted. Any two that face each other are provided for locking the terminal cover 6. A pair of external cord lead-out holes 30 are formed in the terminal cover 6. The external cord lead-out hole 30 is composed of a round hole portion 31 formed on the back surface of the terminal cover 6, and a slit portion 32 formed over the entire circumferential surface in the axial direction and communicating with the round hole portion 31. Further, a pair of guide holes 34a and 34b and inclined portions 35a and 35b are formed at the rear end of the outer peripheral surface of the terminal cover 6 with a phase difference of 180 °. The guide hole 34a and the inclined portion 35a and the guide hole 34b and the inclined portion 35b are formed at the same position, respectively. A cylindrical portion 36 through which the mounting screw 27 is rotatably pierced is integrally provided at the center of the inside of the terminal cover 6.

As shown in FIGS. 1, 2, 4 and 6, the inner case 7 has a cylindrical main body 7 A with an open front surface that is fitted into the main body 5 A of the outer case 5, and a front end of the main body 7 A. When the main body 7A is properly fitted and inserted into the outer case 5, the back surface of the collar section 7B is brought into close contact with the front surface of the collar section 5B of the outer case 5. Is configured. At the center of the front surface of the collar portion 7B, a drainage mountain 37 (FIGS. 1 and 2) formed of an annular protrusion having a V-shaped cross section is integrally provided.

On the back surface of the inner case 7, the internal terminal 25 is provided so as to penetrate therethrough, and a pair of engaging portions 38, 39 are integrally provided so as to project. The internal terminals 25 are concentrically provided so as to correspond to the external terminals 15 of the outer case 5, and are formed integrally with the inner case 7 by insert molding. The engaging portions 38 and 39 are provided so as to project corresponding to the engaging holes 10 and 11 of the outer case 5, and are formed in an inverted L shape in a side view as shown in FIG. The inner case 7 includes vertical base portions 38a and 39a extending toward the rear of the inner case 7, and horizontal portions 38b and 39b extending outward from the inner case 7 at the tips of the vertical base portions 38a and 39a. When they are inserted into the outer case 5, they are inserted into the radial holes 10a, 11a of the engaging holes 10, 11 as shown by the two-dot chain line in FIG. 5, and in this state, the inner case 7 is rotated in the clockwise direction in FIG. When the vertical bases 38a and 39a are moved to the circumferential holes 10b and 11b, the horizontal parts 38b and 39b are brought into abutting engagement with the back surface of the outer case 5, and the inner case 7 is attached to and detached from the outer case 5. Fix as much as possible.

In this case, when the inner case 7 is rotated by 180 ° and fitted into the outer case 5, the different external terminals 15 and the internal terminals 25 are connected to each other, the electric circuit is damaged, or the detector normally functions as a detector. Therefore, the shapes of the radial holes 10a, 11a of the engaging holes 10, 11 and the engaging portions 38, 39 are made different, and the radial hole 10a and the horizontal portion 38b of the engaging portion 38 are fitted to each other. The radial hole 11a and the horizontal portion 39b of the engaging portion 39 are each formed in a rectangular shape that can be fitted to each other, and the horizontal portion 38b of the engaging portion 38 has It does not fit.

When the horizontal portions 38b and 39b of the engaging portions 38 and 39 are respectively inserted into the radial hole portions 10a and 11a of the engaging holes 10 and 11 as shown by the two-dot chain line in FIG. The internal terminals 25 are inserted into the corresponding elongated holes 13 from the inside of the outer case 5 and project to the rear of the outer case 5. By rotating the inner case 7 in the clockwise direction, the projecting portions are shown in FIGS. 4 and 8. As described above, the contact springs 19 are inserted between the holding portions 19e and contact each other at four points, whereby the external terminals 15 and the internal terminals 25 are electrically and mechanically connected. Therefore, the mounting work of the inner case 7 to the outer case 5 and the electrical and mechanical connection work of the outer terminal 15 and the inner terminal 25 are simultaneously performed with one touch.

In FIGS. 1, 2, and 4, a circuit board 41, etc., on which a sensor 40 is mounted, is housed inside the inner case 7. The circuit board 41 is composed of two wiring boards 41A and 41B which are spaced apart from each other in the front and rear. The wiring board 41A located at the rear has a land portion of a printed wiring pattern around both sides of the mounting screw hole. The land portion of the lug contacts the front surface of each of the internal terminals 25 and is screwed and fixed by the set screw 43 to be electrically connected to each of the internal terminals 25. On the other hand, the wiring board 41B located on the front side is fixed together with the lens holder 46 described later by the set screw 45 on the front surface of the plurality of screw mounting portions 44 projecting on the inner peripheral surface of the inner case 7, The lead wire 47 is electrically connected to the wiring board 41A located on the rear side.

The lens holder 46 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 45 is inserted are formed on the inner surface of the rear end side opening. A lens 51, which is made of resin and shaped like a dish, is fitted and fixed in the opening on the front end side. The lens 51 is made of a Fresnel lens, and the outer peripheral edge portion is brought into close contact with the step surface 52 (FIGS. 1 and 4) provided at the front end portion of the inner peripheral surface of the lens holder 46, and the front end portion of the inner peripheral surface of the lens holder 46 is It is fixed to the step surface 52 by, for example, four engaging claws 53 (FIG. 4) provided in a protruding manner on the portion, whereby the distance to the infrared sensor 40 is uniquely determined, and the sensor 40 is focused on the lens 51. I am trying to install it in the correct position.

Since the front cover 8 is formed in a shallow dish shape, it is provided with a disc portion 8A that covers the front faces of the outer case 5 and the inner case 7, and the outer peripheral surface of the disc portion 8A. An opening 54 larger than the inner diameter of the inner case 7 and smaller than the outer diameter of the collar 7B is formed in the center of the disk portion 8A. It is adapted to fit on the outer peripheral surface of the collar portion 5B. In addition, for example, four engaging claws 55 (FIGS. 2 and 6) are integrally projectingly provided around the opening 54 on the inner surface of the disk portion 8A so as to lock the flange portion 7B of the inner case 7. A cover 56 is provided to cover the opening 54 in an airtight manner. The cover 56 is formed in a dish shape from polyethylene resin or the like, the central portion is fitted into the opening portion 54 from the rear, the outer peripheral portion is brought into close contact with the inner peripheral portion of the inner surface of the disc portion 8A, and the surface thereof is The flange portion 7B of the inner case 7 is brought into close contact with the ring-shaped cover packing 57. The outer diameter of the cover packing 57 is set larger than the outer diameter of the cover 56 and the inner diameter thereof is set slightly smaller than the outer diameter of the cover 56, so that the inner surface of the disc portion 8A of the front cover 8 and the rear surface of the outer peripheral portion of the cover 56 are set. When the front cover 8 is attached to the inner case 7 by the engaging claws 55, the front cover 8 is compressed and the gap between the opening 54 and the cover 56 and the gap between the inner surface of the disc portion 8A and the cover 56 are compressed. Airtightly seal. Further, a pair of positioning projections 58 (FIG. 6) are integrally provided on the inner surface of the front cover 8 so as to project from the outer peripheral surface of the collar portion 7B of the inner case 7 when the front cover 8 is mounted. It engages with the notch recess 59 formed in the.

1 and 2, a mounting bracket 60 for locking and fixing the outer case 5 to the ceiling plate 1 is arranged on the outer periphery of the terminal cover 6. The mounting bracket 60 is composed of a highly rigid metal plate 62 having a screw hole 61 into which the mounting screw 27 is screwed, and a leaf spring 63 fixed to the front surface of the metal plate 62. The leaf spring 63 is formed into a U-shape so as to form a pair of left and right open / close legs 63a, 63b extending in the front-rear direction and a connecting portion 63c for connecting the rear ends of the open / close legs 63a, 63b. The connecting portion 63c is locked to the metal plate 62, and the opening / closing legs 63a and 63b are slidable from the rear in the guide holes 34a and 34b provided at the rear end of the outer peripheral surface of the terminal cover 6, respectively. It has been inserted. Further, the open / close legs 63a, 63b have a bent portion 65 that bends inwardly in a V shape at the central portion in the longitudinal direction, and when the mounting bracket 60 is moved back and forth by the mounting screw 27, this bent portion is bent. The terminal cover 65 is configured so as to come into contact with or separate from the inclined portions 35a and 35b formed at the rear end portion of the outer peripheral surface of the terminal cover 6, so that the legs are opened or closed. That is, in the present embodiment, a leaf spring 63 having a closed-leg habit is used, and when this leaf spring 63 is moved to the tip side of the mounting screw 27, as shown by the chain double-dashed line in FIG. Since the bent portion 65 is located behind the terminal cover 6, the open / close legs 63a and 63b maintain the closed state. The distance between the bent portions 65 in this closed leg state is smaller than the outer diameter of the terminal cover 6, and the front half portions of the opening / closing legs 63a and 63b are in close contact with the outer peripheral surface of the outer case 5 and the terminal cover 6, and as a result, the ceiling plate 1 The outer case 5 can be pulled out from the mounting hole 2. Now, as shown by the chain double-dashed line, when the mounting bracket 27 is located on the front end side of the mounting screw 27 and the mounting bracket 27 is rotated to move the mounting bracket 60 forward, the leaf spring 63 Since the tops of the bent portions 65 contact the inclined portions 35a and 35b of the terminal cover 6, respectively, the open / close legs 63a and 63b are gradually opened. Then, when the mounting bracket 60 moves forward by a certain distance, the front end of the leaf spring 63 comes into contact with the ceiling side surface 1b of the ceiling plate 1 and the flange portion 5B of the outer case 5 is moved to the back surface of the ceiling plate 1, that is, the ceiling side surface 1b. Press down. Therefore, the flange portion 5B of the outer case 5 and the leaf spring 63 sandwich the ceiling plate 1, and thereby the outer case 5 is fixed to the ceiling plate 1. When the outer case 5 is removed, the mounting screw 27 may be rotated to move the mounting bracket 60 backward, contrary to the above. Then, the bent portion 65 of the leaf spring 63 moves to the rear of the terminal cover 6, and the open / close legs 63a and 63b close due to their habit of closing the legs, so that the outer case 5 can be easily attached from the mounting hole 2 of the ceiling plate 1. It can be removed.

Here, in the present embodiment, the case where the spring having the habit of closing the legs is used as the leaf spring 63 has been described, but the present invention is not limited to this, and a leaf spring having the habit of opening the legs may of course be used. . In that case, the inclined portions 35a, 35b are not always necessary, and the guide holes 34a, 34b regulate the opening angle of the open / close legs 63a, 63b when the outer case 5 is fixed, and also open / close with the backward movement of the mounting bracket 60. The legs 63a and 63b are closed.

The work of attaching the outer case 5 to the ceiling plate 1 is naturally performed before the attachment of the inner case 7. Further, the number of the leaf springs 63 is not limited to one, and a plurality of leaf springs may be used. For example, when two leaf springs 63 are used, they may be attached to the metal plate 62 while being shifted by 90 ° so as to be orthogonal to each other.

In the ceiling-mounted detector 3 having such a structure, a proper tool such as a driver is inserted into the outer case 5, the mounting screw 27 is rotated, and the mounting bracket 60 is moved back and forth. Since the leaf springs 63 can be opened and closed, the work of attaching and detaching the outer case 5 to the ceiling is extremely simple and easy. Further, in the present proposal, the outer case 5 and the inner case 7 that houses the sensor 40 and the like and is detachably fitted and fixed to the outer case 5 have a two-part structure, so that the construction period can be reduced during the installation work. Due to this, even if the detector has to be installed before the indoor construction is completed, the inner case 7 can be incorporated into the outer case 5 after the indoor construction is completed by attaching only the outer case. Therefore, there is no concern that the sensor 40 will be damaged. Further, since the inner case 7 is detachably attached to the outer case 5 with one-touch by engaging the engaging holes 10 and 11 and the engaging portions 38 and 39, the attaching work of the inner case 7 is simple and easy. is there. Furthermore, when the inner case 7 is incorporated into the outer case 5, the external terminals 15 and the internal terminals 25 are automatically connected, so that the connecting work of these terminals is not necessary and the assembling work is further facilitated. In addition, the engaging portion 38 has a similar shape to the engaging hole 10 and a different shape from the engaging hole 11, and cannot be fitted into the engaging hole 11. There is no possibility that different external terminals 15 and internal terminals 25 will be connected even if they are fitted in 5, and erroneous connection can be reliably prevented.

9 and 10, a wiring checker 70 is housed in the outer case 5 instead of the inner case 7 described above at the time of checking the wiring. The wiring checker 70 is arranged in the case 71 and the case 71. It is composed of six check terminals 72A provided, a conductive member 72B, and a cover 73. The case 71 is formed in substantially the same shape as the inner case 7, so that the main body 71A has a cylindrical shape whose front side 71c is open, and the flange portion integrally provided on the outer peripheral surface of the opening end of the main body 71A. 71B, and a pair of engaging portions 74 and 75 are integrally provided on the rear surface 71d so as to project. The engaging portions 74, 75 are inserted and locked in the engaging holes 10, 11 of the outer case 5 to fix the case 71 to the outer case 5. Since the engaging portions 74 and 75 have exactly the same structure as the engaging portions 38 and 39 (FIG. 2) provided on the rear surface 71d of the inner case 7, detailed description thereof will be omitted.

The terminal portion 72 includes a check terminal 72 A penetrating the back surface of the case 71 and a rod-shaped conductive member 72 B screwed and connected to the inner end of the check terminal 72 A. The front end projects a predetermined amount forward from the front opening of the case 71. The protruding end portion of the check terminal 72A protruding rearward of the case 71 has the case 71 inside the outer case 5 due to the engagement between the engaging holes 10 and 11 of the outer case 5 and the engaging portions 74 and 75. When fitted and fixed, it protrudes rearward from the engaging hole 13 formed in the back surface of the outer case 5 and is held by the holding portion 19e (FIG. 8) of the contact spring 19, whereby the external terminal 15 and the terminal portion are held. 72 is electrically connected.

The cover 73 is detachably attached to the front surfaces of the outer case 5 and the case 71 in place of the front cover 8, and is formed in a shallow dish shape to allow the outer case 5 and the case 71 to be separated from each other. A disc portion 73A covering the front surface, a grip portion 73B projecting from the center of the surface of the disc portion 73A, and a cylindrical portion 73C projecting from the outer circumference of the inner surface of the disc portion 73A are formed. Six insertion holes 76 through which the front end of the conductive member 72B penetrates are formed in the portion 73A at equal intervals on the same circumference. Further, on the inner surface of the disc portion 73A, there are provided an annular projection 77 that fits on the outer peripheral surface of the collar portion 71B of the case 71, and, for example, four engaging pieces 78 and a pair of positioning protrusions 79 that engage with the rear surface of the collar portion 71B. It is projected integrally. The pair of positioning projections 79 are provided so as to be displaced by 180 ° in the circumferential direction, and the cover 73 is positioned with respect to the case 71 by engaging with the engaging recesses 79 formed in the outer peripheral surface of the collar portion 71B. The cylindrical portion 73C is fitted to the outer peripheral surface of the collar portion 5B of the outer case 5.

The wiring checker 70 having such a configuration is housed in the outer case 5 instead of the inner case 7, and the outer case 5 is connected to the front end of the conductive member 72B by connecting the tester or the crocodile opening of the measuring device. It is possible to check the connection status of the external terminal 15 and the external cord 20 in a state where the external terminal 15 and the external cord 20 are embedded and installed in the ceiling. When checking the wiring, the engagement between the engagement holes 10 and 11 and the engagement portions 38 and 39 can be easily released by rotating the inner case 7 by a small angle as described above. Therefore, the inner case 7 can be removed with one touch. Since the wiring checker 70 can be mounted by simply inserting the case 71 into the outer case 5 and rotating it by a small angle to engage the engaging holes 10 and 11 with the engaging portions 74 and 75, It is simple and easy and can be installed with one touch.

FIG. 11 is a sectional view showing another embodiment of the present invention. In this embodiment, a check terminal 72A is provided through the back surface 71d of the case 71, one end of a lead wire 81 as a conductive member is soldered to the inner end of the check terminal 72A, and a knot 82 is provided on the other end side to prevent disconnection. Together, they are led out to the inside of the room through an insertion hole 83 provided in the cover 73 that covers the front surface 71c of the case 71 and connected to a measuring device such as a tester 84. Even with such a configuration, the same effect as that of the above embodiment can be obtained.

Although the above embodiment has been described for the case where the present invention is applied to the occupancy detector 3, the present invention is not limited to this, and various changes and modifications can be made. It is possible to provide 10, 11 in the inner case 7 and the engaging portions 38, 39 in the outer case 5. 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 can be housed and arranged in the inner case 7. A combined detector is also possible. Further, in this embodiment, the terminal cover 6 is manufactured separately and is detachably attached to the outer case 5. However, the present invention is not limited to this, and the outer case 5 and the terminal cover 6 are formed, The external terminal 15 may be incorporated inside. Furthermore, although the detector 3 is embedded in the mounting hole 2 of the ceiling plate 1 in this embodiment, it may be embedded in the wall surface.

[0033]

[Effect of device]

 As described above, the indoor-mounted detector according to the present invention is configured such that an outer case embedded in a ceiling or a wall surface, an inner case fitted into the outer case, and an inner case used for wiring check. The wiring checker is fitted into the outer case, and when the wiring checker is fitted into the outer case, the check terminals provided on the wiring checker are connected to the outer terminals of the outer case and led out into the room by the conductive member. Wiring can be checked without removing the outer case from the wall or ceiling. Therefore, the time required for the wiring check work for each detector can be significantly reduced, and the workability can be improved.

[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 rear view of the outer case.

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

FIG. 5 is a front view of an outer case.

FIG. 6 is a rear view of the inner 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 of a wiring checker.

FIG. 10 is a partially cutaway exploded perspective view of the checker.

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

[Explanation of symbols]

 1 Ceiling Plate 2 Mounting Hole 3 In-Room Detector 5 Outer Case 6 Terminal Cover 7 Inner Case 8 Front Cover 15 External Terminal 20 External Cord 25 Internal Terminal 40 Sensor 41 Circuit Board 60 Mounting Bracket 63 Leaf Spring 70 Wiring Checker 71 Case 72 Terminal Part 72A Check terminal 72B Conductive member 81 Lead wire

Claims (1)

[Scope of utility model registration request] 1. An outer case having an external terminal to which an external cord is connected and fitted and fixed in a mounting hole provided on a wall surface, a ceiling or the like, a sensor, a circuit board, an internal terminal, etc. An inner case housed in the case and a wiring checker are provided, and the wiring checker includes a case, a check terminal housed in the case, and a conductive member led from the check terminal to the indoor side of the case. Consists of
An indoor-mounted detector characterized in that the check terminal is electrically connected to the external terminal by being inserted into the outer case instead of the inner case.