JP2575186Y2 - Indoor mounted detector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indoor-mounted detector which can be mounted on ceilings, walls and the like of buildings such as offices, hotels, hospitals and the like.

[0002]

2. Description of the Related Art Conventionally, in buildings and the like,
Various detectors such as temperature and humidity detectors, infrared detectors, and fire detectors are embedded and installed in the ceiling and wall to control air conditioning and prevent theft and fire. As a mounting structure of this type of detector, the most common method is to fit a case to which a sensor is mounted in a concave portion provided on a wall or the like and fix the case by a fastening means such as a screw (eg, Japanese Utility Model Laid-Open No. 3-4).
No. 2544).

[0003]

[Problem to be Solved by the Invention] However, in the case of such a conventional detector, when the installation work has to be performed before the indoor work is completed due to the work period, There is a possibility that the detector may be damaged, so that it is necessary to protect the detector with an appropriate protective member until the indoor work is completed. Also, when replacing the detector, it is necessary to remove the detector, disconnect the external cord, and then connect the external cord to the new detector and attach it to the wall, etc., and the replacement work is troublesome. There was also a problem.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to make the case into a two-part structure so that the work can be completed before the indoor work is completed due to the construction period. Even if it is necessary to attach the detector, the detector itself does not need to be attached in advance, and the attachment and detachment work and the connection work between the external terminal and the internal terminal are simple and easy, and different. An object of the present invention is to provide an indoor-mounted detector capable of preventing erroneous connection between terminals.

[0005]

In order to achieve the above object, a first aspect of the present invention is to provide a cup-shaped outer case having an external terminal to which an external cord is connected and embedded in a wall surface, a ceiling, or the like ;
A sensor, a circuit board, an internal terminal, etc., and a cup-shaped main case. The main case is inserted into the outer case and is engaged by engaging means provided on these two members. The sensor is detachably connected, and the sensor is
In a position retracted from the wall, ceiling, etc.
The external terminal is provided on the back side of the outer case,
By the engagement of the engagement means, the internal terminal is electrically and electrically connected.
They are connected mechanically . It is designed to be mechanically connected. According to a second aspect of the present invention, in the first aspect, the engaging means has a positioning function for positioning the main body case with respect to the outer case.

[0006]

According to the present invention, the main body case is detachably connected and fixed to the outer case by one-touch operation by the engagement between the engagement hole and the engagement portion. The internal terminal is electrically and mechanically connected to the external terminal at the same time as the fixing. The engagement hole and the engagement portion position the main body case with respect to the outer case so that the internal terminal is not erroneously connected to the external terminal.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the 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, and FIG. IV
5 is a bottom view of the outer case, FIG. 6 is a plan view of the main body case, FIG. 7 is a cross-sectional view showing an external terminal mounting structure, and FIG. 8 is a perspective view of a contact spring and internal terminals. In these figures, the present embodiment is embedded and installed on the ceiling surface, and detects the presence or absence of a room occupant by infrared rays radiated from the human body and the like,
This shows a case where the present invention is applied to a ceiling-mounted occupancy detector 1 for controlling indoor temperature and humidity, lighting, and the like. Such an occupancy detector 1
As shown in FIGS. 1 and 2, an external case 4 having an external terminal 3 to which the external cord 2 is connected, and a sensor 5, a circuit board 6, an internal terminal 7 and the like are built in and fixed to the external case 4. It is composed of a main body case 8, a front cover 9 covering the lower surface of the outer case 4, etc., is fitted and fixed in a mounting hole 11 provided at an appropriate position of the ceiling plate 10, and protrudes above the ceiling plate 10. A box 13 for covering the outer cord 2 from rats and the like is covered at the upper end of the outer case 4.

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

The contact spring 16 is formed by bending a thin leaf spring into a shape as shown in FIG. 8, so that a horizontal plate-like base 16a provided at the upper end is formed on the horizontal base 15B of the terminal fitting 15. An elastic holding portion 16b, which is fixed to the lower surface by welding and bent inward at the lower end side, elastically holds the internal terminal 7 is provided in opposition. Two sets of elastic holding parts 16b are provided in the height direction, and elastically hold the internal terminals 7 at four points. The plate-like base portion 16a of the contact spring 16 formed in this manner has the narrow portions 15C and 15D of the terminal fittings 15 having the locking holes 23 and 2 of the outer case 4.
When each of the external terminals 3 and the internal terminals 7 is inserted and locked to the receiving case 25, the receiving terminal 25 is closely contacted with the receiving base 25 projecting from the upper surface of the outer case 4. Therefore, the outer case 4 is swingable in the radial direction of the outer case 4 while being separated therefrom.

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

The engaging holes 30 and 31 are used to lock the main body case 8 and are formed with a phase difference of 180 ° from each other. Directing radial holes 30a, 31a
And circumferential holes 30b and 31b communicating with the inner ends of the radial holes 30a and 31a. The long hole 32 is
Each of the engagement holes 30 and 31 is formed to be long in the circumferential direction at predetermined intervals in the circumferential direction by three each.

As shown in FIGS. 2 and 3, the external terminal mounting portion 33 is composed of a pair of mounting walls 33a and 33b which are provided in parallel at a constant interval in the circumferential direction.
Supporting portions 34 for supporting both sides of the lower surface of the central portion 15A of the terminal fitting 15 are provided on the inner surfaces of the mounting walls 33a and 33b.
Are protruded integrally from each other. The three external terminal mounting portions 33 are disposed on opposite sides of a virtual line 35 (FIGS. 3 and 5) passing through the center of the outer case 4 and connecting the pair of engagement holes 30 and 31. And 3 on the same side
The two external terminal mounting portions 33 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.
And a flange 8B integrally projecting from the outer peripheral surface of the lower end of the outer case 4. When the main body 8A is correctly inserted into the outer case 4, the upper surface of the flange 8B is attached to the lower surface of the flange 4B of the outer case 4. It is configured to be close. At the center of the lower surface of the flange portion 8B, a drainage mountain 37 (FIG. 1) composed of an annular projection having a V-shaped cross section is integrally provided.

On the upper surface of the main body case 8, the internal terminal 7 is provided so as to penetrate therethrough.
1 are integrally provided. The internal terminals 7 are provided so as to correspond to the external terminals 3 of the outer case 4 and are formed integrally with the main body case 8 by insert molding. The engagement portions 40 and 41 are provided with the engagement holes 3 of the outer case 4.
1 and 2, and are formed in an inverted L shape in a side view, as shown in FIGS. 1 and 2, so that the vertical bases 40a and 41a and the vertical bases 40a and 41 are formed.
a countercurrent selfish extending outwardly to the upper end of the horizontal portion 40b, 4
When the main body case 8 is inserted into the outer case 4, the main body case 8 is inserted into the radial holes 30 a, 31 a of the engagement holes 30, 31 as shown by two-dot chain lines in FIG. When the case 8 is rotated clockwise in FIG. 5, the vertical bases 40a, 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 body The case 8 is detachably fixed to the outer case 4.

In this case, when the main body case 8 is rotated by 180 ° and inserted into the outer case 4, different external terminals 3 and internal terminals 7 are connected to each other to break an electric circuit or to function normally as a detector. Therefore, the shape of the radial holes 30a, 31a of the engaging holes 30, 31 and the shapes of the engaging portions 40, 41 are different from each other, so that the radial hole 30a and the engaging portion 40 can be fitted into a trapezoid. The radial hole portion 31a and the engaging portion 41 are similarly formed in rectangular shapes that can be fitted to each other, so that the engaging portion 40 does not fit in the radial hole portion 31a.

The horizontal portions 40 of the engaging portions 40, 41
As shown by the two-dot chain line in FIG.
When each of the internal terminals 7 is inserted into the corresponding one of the radial holes 30a, 31a, the internal terminal 7 is inserted from below into the corresponding elongated hole 32, protrudes above the outer case 4, and rotates the main body case 8 clockwise. 4 and FIG.
As shown in (1), the external terminal 3 and the internal terminal 7 are electrically and mechanically connected by being inserted between the elastic holding portions 16b of the contact spring 16 and making four-point contact. Therefore, the operation of attaching the main body case 8 to the outer case 4 and the operation of electrically and mechanically connecting the external terminals 3 and the internal terminals 7 are simultaneously performed with one touch.

As shown in FIGS. 1 and 4, the wiring board housed and disposed in the main body case 8 is composed of two wiring boards 6A and 6B which are vertically separated from each other and is located above. The wiring board 6A has printed wiring pattern lands around both sides of the mounting screw holes, and the lands are brought into contact with the lower surfaces of the internal terminals 7 and fixed by screws with set screws 45. It is electrically connected to the internal terminal 7. On the other hand, the wiring board 6B located below
A pair of screw mounting portions 4 protruding from the inner peripheral surface of the main body case 8
6, is fixed together with a lens holder 47 to be described later by a set screw 48, and is electrically connected to the wiring board 6A located above by a lead wire 49. At the center of the lower surface of the lower wiring board 6B, an infrared sensor 5 for detecting infrared rays emitted from the occupants is provided.

The lens holder 47 is formed in a cylindrical body having both ends open, and the set screw 48 is provided on the inner surface of the upper end opening.
A pair of screw mounting portions 50 having screw mounting holes through which
Are integrally formed, and a dish-shaped lens 51 made of resin is fitted and fixed to the lower end side opening. The lens 51 is made of a Fresnel lens, and its outer peripheral edge is closely contacted with a step surface 52 (FIG. 4) provided below the inner peripheral surface of the lens holder 47, and protrudes below 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), whereby the distance from the infrared sensor 5 is uniquely determined, and the sensor 5 is connected to the lens 5.
It can be accurately set at two focal positions.

The front cover 9 is formed in the shape of a shallow dish, and has a disk portion 9A that covers 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 that is larger than the inner diameter of the main body case 8 and smaller than the outer diameter of the flange portion 8B is formed in the center of the disk portion 9A, and the cylindrical portion 9B is formed by the flange portion 4B of the outer case 4. It is adapted to be fitted to the outer peripheral surface. Also,
On the inner surface of the disc portion 9A, around the opening portion 54, for example, four engaging claws 55 (FIGS. 2 and 4) for locking the front cover 9 to the flange portion 8B of the main body case 8 are integrally provided. At the same time, a cover 56 that covers the opening 54 in an airtight manner is provided. The cover 56 is formed in a dish shape with a polyester resin or the like, and a central portion is fitted into the opening portion 54 from above, an outer peripheral portion is in close contact with an inner peripheral portion of the inner surface of the disk portion 9A, and the main body is placed thereon. The flange portion 8B of the case 8 is placed via a 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 set 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 back surface of the outer peripheral portion of the cover 56 are common. When the front cover 9 is attached to the main body case 8, the front cover 9 is compressed and the opening 54 and the cover 5 are closed.
6 and the gap between the inner surface of the disk portion 9A and the cover 56 are hermetically sealed.

In FIG. 1, the box 13 is a JIS
It is called a box, and its size, material, etc. are defined by JIS. It has an opening 60 in the center of the lower surface, into which the outer case 4 is inserted.
A screw hole 61 into which the screw 8 is screwed is formed.

FIGS. 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 screws 28. In this embodiment, a terminal cover 70 is detachably fitted to and fixed to the upper surface of the outer case 4, and mounting screws 71 provided through the outer case 4 and the terminal cover 70 are provided at upper ends protruding above the terminal cover 70. A configuration in which the mounting bracket 72 is screwed together, and the mounting bracket 72 is brought into contact with the underside 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.

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 having an open lower surface. These engaging claws 74 are engaged with engaging concave portions 75 formed on the outer peripheral surface of the upper end portion of the outer case 4. In this case, the positioning of the terminal cover 70 with respect to the outer case 4 does not require strictness.
For example, six of them 5 are equally arranged on the outer periphery of the outer case 4, and any two of the engaging recesses facing each other with a shift of 180 ° are used for locking the terminal cover 70. The terminal cover 70 has a pair of external code lead-out holes 76 formed therein. This external code lead-out hole 76
It is composed of a round hole 76a formed on the upper surface of the terminal cover 70, and a slit 76b formed over the entire length in the circumferential surface height direction and communicating with the round hole 76a.

The mounting bracket 72 includes a highly rigid metal plate 77 having a screw hole 77a (FIG. 10) at the center of which the mounting screw 71 is screwed, and a leaf spring 78 fixed to the lower surface of the metal plate 77. It is configured. The leaf spring 78 is bent in a downward U-shape when viewed from the front, so that a pair of left and right opening / closing legs 78a and 78b and these opening / closing legs 78a and 78 are provided.
b and a connecting portion 78c for connecting the upper end of
8c is locked to the lower surface of the metal plate 77,
a, 78b are slidably inserted into guide holes 79a, 79b provided at the upper end of the outer peripheral surface of the terminal cover 70, respectively. Further, the opening / closing legs 78a and 78b have a bent portion 80 which is bent in a V-shape inward at a middle portion in the height direction. It is configured such that it comes into contact with and separates from the inclined portion 81 provided on the surface, and is thereby opened and closed. That is, when the leaf spring 78 is provided with the leg closing behavior and the leaf spring 78 is moved to the upper end by the mounting screw 71, the bent portion 80 is formed as shown by a two-dot chain line in FIG.
Are located above the terminal cover 70, so that the opening / closing legs 78
a, 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. When the mounting screw 71 is rotated and the mounting bracket 72 is moved downward in a state where the mounting bracket 72 is positioned above the mounting screw 71 as shown by a two-dot chain line, the bent portion 80 of the leaf spring 78 is moved. Are in contact with the inclined portion 81 of the terminal cover 70, so that the opening and closing legs 78a and 78b are gradually opened. When the mounting bracket 72 is lowered by a predetermined distance, the lower end of the leaf spring 78 is moved to the side 10 above the ceiling plate 10.
b, and the flange 4B of the outer case 4 is pressed against the indoor side surface 10a of the ceiling plate 10. Accordingly, the flange 4B of the outer case 4 and the leaf spring 78 sandwich the ceiling plate 10, thereby securely fixing 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, whereby 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 leg closing behavior, but may be the one having the leg opening behavior. In that case, the guide holes 79a,
79b is an opening / closing leg 78a instead of the inclined portion 81 described above.
78b is closed.

In such a configuration, the operation of attaching the outer case 4 to the ceiling plate 10 is simpler and easier than when the outer case 4 is fixed using the box 13.
That is, as shown in FIG.
Since the outer diameter of the outer case 4 is larger than the mounting hole 11 of the outer case 4,
Must be inserted into the screw mounting hole 29 provided in the flange 4B and screwed into the screw hole 61 of the box 13. However, 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 and closed by the rotation operation of the mounting screw 71, and comes into contact with and separates from the ceiling plate 10. 4 can be securely fixed.

Thus, in the ceiling-mounted detector 1 having such a configuration, the outer case 4 attached to the ceiling plate 10 and the main body case which houses and holds the sensor 5 and the like and is detachably attached to the outer case 4. 8 so that even if the installation work requires installation of the detector before the indoor work is completed due to the construction period, only the outer case 4 is installed. After the indoor construction is completed, the main body case 8 can be incorporated into the outer case 4,
No worries about damaging the detector. Further, since the main body case 8 is detachably attached to the outer case 4 by one-touch operation by the engagement of the engagement holes 30, 31 and the engagement portions 40, 41, the attaching operation of the main body case 8 is simple and easy. . Further, when the main body case 8 is incorporated into the outer case 4, the external terminals 3 and the internal terminals 7 are automatically connected, so that the connection 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. 4, the erroneous connection between the external terminal 3 and the internal terminal 7 can be reliably prevented. Further, in the present invention, since the outer case 4 is formed in a cylindrical body and embedded and installed in the ceiling plate, the amount of protrusion toward the indoor side can be significantly reduced, and the appearance 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, 9 are provided on the inner bottom surface of the outer case 4 and the back surface of the main body case 8, respectively.
2, 93 are provided, and these form a coupling means. A pair of magnets 9 arranged on the outer case 4 side
Of the magnets 0 and 91, the magnet 90 is disposed with the N pole facing the front of the case and the S pole facing the rear of the case. The magnet 91 has the S pole facing the front of the case and the N pole facing the rear of the case. It is arranged. Similarly, the magnet 92 of the pair of magnets 92, 93 disposed on the body case 8 side is disposed with the N pole facing the front of the case and the S pole facing the rear of the case. Are disposed with the N pole facing the front of the case and the N pole facing the rear of the case. When the main 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 main body case 8 is fixed in the outer case 4 because these magnets come into close contact with each other by magnetic force. When the magnet 9 is opposed to the magnet 91 and the magnet 93 is opposed to the magnet 90, the main body case 8 cannot be fixed by the repulsive force between the magnets. Can be prevented.

Although the above embodiment has been described with reference 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 are possible. 30 and 31 to the main body case 8
41 can be provided on the outer case 4. The engaging means can be variously changed and deformed. For example, a spring clip, a quick fastener, or the like may be used. Further, the present invention can be applied to temperature and humidity detectors, fire detectors, intrusion detectors, and the like without being limited to the occupancy detectors. It can also be a detector.

[0028]

As described above, the indoor-mounted detector according to the present invention includes an outer case mounted on a ceiling or a wall, and a main body case inserted into the outer case. As a result, the main body base can be detachably attached to the outer case with a single touch without any screws, and the attaching operation of the main body case is simple and easy. Further, since the internal terminals and the external terminals are electrically and mechanically connected at the same time when the main body case is mounted, the connection work of these terminals is unnecessary, and the mounting work is further facilitated. Furthermore, since the external cord and the external terminal can be kept connected during the mounting of the main body case, the maintenance of the sensor, the inspection and replacement work, etc., the workability is excellent, and the present invention has the terminal in the engaging hole and the engaging portion. Since the function of preventing erroneous connection between them is provided , the effect is great, for example, there is no possibility that different terminals come into contact with each other to damage the detection circuit.

[Brief description of the drawings]

FIG. 1 is a cross-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.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

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 an external terminal.

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

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 occupancy detector 2 external code 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 portion

Claims (2)

(57) [Scope of request for utility model registration] 1. A cup-shaped outer case having external terminals to which an external cord is connected and embedded in a wall surface, a ceiling, or the like ;
A sensor, a circuit board, an internal terminal, etc., and a cup-shaped main case. The main case is inserted into the outer case and is engaged by engaging means provided on these two members. The sensor is detachably connected, and the sensor is
In a position retracted from the wall, ceiling, etc.
The external terminal is provided on the back side of the outer case,
By the engagement of the engagement means, the internal terminal is electrically and electrically connected.
An indoor-mounted detector that is mechanically connected . 2. The indoor-mounted detector according to claim 1, wherein the engaging means has a positioning function for positioning the main body case with respect to the outer case, thereby preventing erroneous connection between the external terminal and the internal terminal. Features indoor-mounted detector.