JPS5847514Y2 - Kodenshikikemurikanchiki - Google Patents

Description

[Detailed description of the invention] This invention combines the noise light that is constantly incident on the light receiving element by the light from the light source being reflected near the optical system when there is no smoke, and the scattered light of smoke particles when smoke is present. This is related to a photoelectric smoke detector in which the light-receiving element responds due to the addition of -i, and electrical accidents are prevented by preventing water droplets from accumulating on the detector. .

The following description will be given based on the drawings shown as an embodiment of the present invention. Reference numeral 1 denotes a circular sensor body, which is composed of upper and lower lids X and Y formed in a circular shape from synthetic resin.

The upper cover X is further made of plywood Xa that is attached to the ceiling surface HK.
are separated.

Reference numeral 2 denotes a circular inner recess formed on the lower surface a of the plywood Xa, through which mounting holes 3, 3 to which the base plate Xa is attached to the ceiling surface HK and an electric wire lead-in port 4 are bored, respectively.

Reference numerals 5 and 5 denote two terminal boards installed in the inner recess 2, and the positional relationship with the mounting holes 3, 3 and the lead-in port 4 is such that the lead-in port 4 is in the center.
Moreover, on this day, terminal plates 5, 5 are located parallel to each other on both sides of 40.

Moreover, the mounting holes 3, 3 are located on the outermost side.

Reference numeral 6°6 denotes two wire tightening screws provided on each terminal board 5, 5, one each for input and the other for feeding.

Reference numerals 7, 7 indicate insertion blades formed diagonally at one end of each terminal plate 5, 5, and are removably joined to receiving blades 8, 8 mounted on the upper surface bK of the upper lid X by rotation of the upper lid X. and get caught.

Note that the receiving blades 8, 8 are formed in an arc shape as they rotate, and are inserted into the insertion blade T.

The upper blade 8a that receives the load is made of a thick plate, and the lower blade 8b is made of a thin spring plate that applies contact pressure. It is fixed to the protruding flesh part 9 so as to float up.

Of course, the insertion blade? , 7 may be provided on the main body 1, and the receiving blade 88 may be provided on the base plate Xa, these are optional, and 71b 10,1
0 is a fixing screw thereof, which penetrates from the lower surface C of the upper lid X and is screwed into the receiving blades 8, 8.

Further, on the upper surface bK of the upper lid X, a circular receiving stage 11 is formed for positioning the base plate Xa for rotation.

Furthermore, cutouts 12, 12 for draining water are provided in the receiving stage 11 as appropriate. Therefore, water droplets accumulated on the upper surface of the upper lid X flow out through the cutouts 12, 12, and the receiving blades 8.8 Insulation failure due to water in the protruding interior 9 is taken into consideration.

Reference numerals 13 and 13 denote left and right chambers of a four-sided enclosing wall 13a integrally formed on the lower surface C of the upper lid X, with openings 13b and 13 on the lower surface.
b.

The left and right chambers 13.13 have a space 14 in the center,
In addition, the left and right chambers 13, 13 are connected to the outer circumferential wall 15 of the upper lid X by a hanging circumferential wall 17.17 forming a parallel interval 16.

Then, a component 18 constituting a power supply section is housed in one chamber 13 of the left and right chambers 13, and a component 19 constituting an expansion section and a switch section is housed in the other chamber 13, and silicone rubber 20 is poured in and sealed. There is.

Also, the left and right chambers 13, 130 each part % 18.19 is the lead wire 2.
1 and are in contact with the lower surface C along the hanging peripheral walls 17, 17.

Incidentally, the lead wire 2102 passes through the upper lid X and is connected to the receiving blades 8, 8 on the upper surface.

Furthermore, a return wire 21a, which can also be called a ground wire for preventing electrical noise in the lead wire 21, has a relay contact 22 interposed therebetween.

This contactor 22 is connected to the space 1 of the left and right chambers 13 and 13.
It is received by a small protruding pillar 23 located at 4.

The small protrusions 23 are protruded from the four corners of the space 14, and the small protrusions 23 and 23 on the diagonal line intersect with the relay contact 22 and the other small protrusions 23 on the diagonal line. Blade 8,
8 fixing screws 10.10 are inserted and positioned.

That is, the heads of the screws 10, 10 are hidden.

Reference numeral 24 denotes a light source connected to the one chamber 13, which is a power supply section, through a lead wire 21, and a light emitting diode is used as an example.

Reference numeral 25 denotes a light-receiving element connected to the other chamber 13, which is an intensifier part and a switch part, by a lead wire 21;
The relationship is that when the light from the flow source 24 is projected onto the light receiving element 25,
The output of the light-receiving element 25 is transmitted to a receiver (not shown) through the action of an intensifier and a switch in the other chamber 13, and determines the operation of the smoke detector.

The light source 24 and the light-receiving element 25 are mounted opposite to a substrate 26, and this substrate 26 is a synthetic resin container IK.
In comparison, it is made of a material that is superior in terms of thermal properties and aging properties, and although metal is used as the material in the drawings of the embodiment, it may of course be made of thermosetting synthetic resin.

Reference numerals 27 and 28 are light blocking bodies located between the light source 24 and the light receiving element 25 to prevent light from being directly projected onto the light receiving element 25.

Therefore, the relationship between them is as follows.

That is, the light source 24 is press-fitted into a split round hole 29b of a vertical piece 29a of a cylindrical-shaped support frame 29 made of L synthetic resin, and is held by the repulsive force of the widening of the split groove 29c.

Further, the small protrusions 24a of the light source 24 fit into the grooves 29c to determine the position.

29d is a horizontal piece of the inverted support frame 29. The light receiving element 25 is similarly formed in an inverted shape, with the vertical piece 25a facing the light source 24.

Reference numeral 25b denotes a horizontal piece of the element 25, which is located on the side closer to the light source 24. The light body 2γ is made of metal and is formed in an inverted shape. 2γb and 27b are provided on both sides, so as to surround the light source 24.

Further, the vertical piece 27a is provided with a probe hole 2γC through which light is projected only in the necessary direction.

27d is a horizontal piece.

The other light body 28 on the side of the light receiving element 25 is formed of synthetic resin in an inverted shape, and two hands 28b, 2 are provided at the bottom end of the vertical piece 28a.
8c, the higher one 28b is located on the light source 24 side, and the lower one 28c is located on the light receiving element 25 side, like an edge that cuts light.

28d is a horizontal piece.

In addition, the support frame 29 of the M24, the light receiving element 25, and one of the light bodies 28 are attached to the substrate 26 by the horizontal pieces 29d, 25b, 28.
The vertical pieces 29a, 25a, and 28a are inserted so that d is located on the top surface, and fixed with screws 30.

The horizontal piece 27d of the other light body 2T is placed against the lower surface of the substrate 26 and fixed with rivets 31.31.

32 is each vertical piece 29a, 25a. 28a inserter L 3
3 is a through hole provided in the center of the board 26 through the horizontal piece 27d of the shimmering light body 27, so that the board 26 rests on the small protrusions 23, 23, 23 at the four corners, and screws 34 ，
34 includes the relay contact 22 and the diagonally positioned small protrusions 2
3. Screw into 23 and then the relay contact 22 and the board 2
6, and some of the lead wires 21 are prevented from hanging down on the board 26.

Note that one end 26a of the board 26 presses the lead wire 21 a lot, so it is bent downward.

Moreover, if the light source 24 is removed from the supporting frame 29, the board 26 can be pulled out.

(Of course, while the light receiving element 25 and its lead wire 21 are connected) Also, as shown in the irradiation range of FIG. Hole 27c, second hand 28b, 28
The light is not directly projected onto the light receiving element 25 at c, and these three members 24, 25, 2γ, and 28 constitute an optical system section Z.

Note that the substrate 26 is also considered to be a part of the optical system section Z.

Next, the lower lid Y will be explained.

35 is an outer circumferential wall of the lower lid Y, and an upward circumferential wall 37 forming a parallel interval 36 is formed.

38 is a notch provided in four places at the upper end of the upward peripheral wall 3T;
This is a partition column that partitions the parallel interval 36 so as to be in the same position as the four notches 38 of the 39-bar, and its upper end is almost flush with the upper end of the upward peripheral wall 37.

The upward circumferential wall 37 is fitted in such a way as to fit into the depression interval 16 between the outer circumferential wall 15 of the upper hem X and the hanging circumferential walls 1γ, 17, and the parallel interval 16 of the upper cover X is Four receiving posts 40 are formed that match the notches 38 of the lower lid Y.

Therefore, the upper end of the upper peripheral wall 3T of the lower lid Y is the lower surface CK of the upper lid
There is no full-surface contact and a gap 41 is maintained so that smoke from the outside enters the interior through this gap 41.

Further, the cut-off pillar 39 prevents smoke from passing along the outer periphery of the upward peripheral wall 37 and allows it to enter the gap 41.

Reference numeral 42 denotes a circular window hole provided in the center of the lower lid Y, and the lower surface d of the lower lid Y is an inclined surface that becomes higher toward the outer periphery than the central circular window hole 42.

43 is a metal window cover placed on the upper surface of the lower cover Y, and the circular window hole 4
2 is formed, and a large number of /J-fL 45 are bored at equal intervals from the outer periphery of the recess 44.

The recess 44 is located above the hole edge 42a of the circular window hole 42 with a distance 46 therebetween.

Therefore, smoke rising from the lower surface accumulates in this interval 46 and inevitably enters from the L45.

4T is an elastic sheet placed on the window cover 43, made of transparent nylon, and has a large hole 48.

49 is a metal circular press plate that rests on the elastic sheet 4γ,
Also, hold down the window cover 43 together with the sheet 4γ using the screws 50, 5.
Fixed by 0,50.

51.51.51 is the screw 5 installed on the soil surface e of the lower cover Y
0, 50, 50 are small protrusions that can be screwed in, 52 (/'i are other small protrusions protruding from the top surface, window cover 43, sheet 41,
The holding plate 49 is now positioned.

53 is a hole provided in the three parts 43, 47, and 49 with the small protrusion 52, and 54 is a hole provided in the center of the holding plate 49, through which the smoke passing through the /J L45 of the window cover 43 passes through the sheet 47. large hole 4
3 through the hole 54 to reach the optical system section Z of the upper lid X.

55 is a U-shaped metal fitting with a bottom opening, and both side pieces 55a, 55a are fixed to the holding plate 49 across the hole 54.

In addition, outward facing pieces 55b and 55b are provided on both side pieces 55a and 55a to improve the sitting comfort.

55c is both side pieces 55a. A lower piece 56 connecting the parts 55a is an elastic mat attached to the press plate 49 and pushes up the light body 27 on one side of the upper lid X when the upper and lower lids X and Y are combined.

The mat 56 is made of sponge, rubber, or the like.

5γ is a tightening screw for assembling the upper and lower lids X and Y, which is inserted into the center of the upper lid do.

The head of this screw 57 matches the lead-in port 4 of the base plate Xa, and the screw 5T can be operated from the lead-in port 4 with a screwdriver.

58 is a retaining ring for removing the screw 51, using a C type,
It is press-fitted into the hole 59 from the lower surface C of the holder, and is locked in the hole 59 by the repulsive force of the pressing force.

Further, by tightening this screw 57, the U-shaped metal fitting 55 and the rivets 31, 31 of the board 25 are electrically connected.

Incidentally, in FIGS. 7 and 8 of the drawings of the embodiment, the small speckled portions are all colored black so as to absorb the light from the light source 24.

Further, to explain the operation of the photoelectric smoke detector of the present invention, the light source 24 emits light using power from the one chamber 13, which is the power supply section.

The light beams and the light bodies 27 and 28 prevent the light receiving element 25 from being irradiated with light, and the light receiving element 25 does not operate.

At this time, it seems that the light from the light source 24 is slightly diffusely reflected (noise light) within the upper and lower lids XY, but even with this, the light from the light source 24 is still
5 is not working.

Next, when smoke occurs due to a fire, etc., the smoke enters through the small hole 45 of the window cover 43 of the lower cover Y, and enters the upper and lower cover X through the hole 54 of the holding plate 49.
, flows into Y.

When this smoke flows in, the light becomes scattered light due to the smoke particles, and is irradiated onto the light receiving element 25.

Therefore, the light receiving element 25 is activated, and the light is transmitted to the other chamber 13, which is the multiplication part and the switch part, and then to the receiver (not shown) through the terminal plates 5, 5 of the base plate Xa.

In the present invention, as described above, the base plate Xa, which is attached to the ceiling H from the sensor body 1 equipped with the light source 24, the light receiving element 25, etc., and equipped with the input/output terminal boards 5, 5, is separated and formed into a circular shape. , this base plate Xa and the main body 1 are inserted into the blade 7. The insertion blades 7, 7 or the receiving blades 8, 8 located on the upper surface of the main body 1 are fixed to the protruding flesh portions 9, 9 so as to be raised from the upper surface. , and further body 1
Circular support stage 1 for rotational positioning of the circular base plate Xa on the top surface of
1 is integrally formed, and water drainage notches 12 are provided at arbitrary locations on the receiving stage 11. Therefore, water droplets adhering to the upper surface of the main body 1 flow out from the notches 12 without accumulating. Since the insertion blades 7, 7 or receiving blades 8, 8, which are live parts fixed to the top surface, are floating on the protruding interiors 9, 9, electrical accidents of the live parts due to water can be more reliably prevented. In addition, since the rotational position of the circular base plate Xa is determined by the circular receiving stage 11 provided with the draining notch 12, the insertion blade γ.

7 and the receiving blades 8, 8 have the effect of ensuring reliable rotational engagement.

Further, a notch is provided in the circular receiving stage on the top surface of the main body, and it is possible to provide a necessary and sufficient notch for draining water without damaging the appearance.

In addition, by removing the main body from the ceiling surface while the hook is still attached, it is possible to check for water leakage from the ceiling or water droplets directly attached to the main body, and maintenance and inspection of the building and the sensor can be carried out appropriately. A safer photoelectric sensor is realized and beneficial.

[Brief explanation of the drawing]

The drawings show an embodiment of the photoelectric smoke detector of the present invention, in which Fig. 1 is a front view, Fig. 2 is a side view, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Fig. 4 is taken along line B- B sectional view, Figure 5 is a front view of the top cover,
Figure 6 is a front view of the lower cover, Figure 1 is an exploded slope view of the upper cover, Figure 8 is an exploded slope view of the lower cover, Figure 9 is a slope view of the plywood,
0 is a front view of the optical system section, and FIG. 11 is a sectional view.

Claims (1)

[Scope of utility model registration request] A plywood board attached to the ceiling surface from the sensor body equipped with a light source, a light receiving element, etc. and equipped with an input/output terminal board is separated and formed into a circular shape, and this plywood and the main body are connected by an insertion blade and a receiving blade. It is removably rotated and electrically connected, and the insertion blade or receiving blade located on the top surface of the main body is fixed to the protruding flesh part so as to rise above the top surface, and furthermore, the circular base plate is rotated and positioned on the top surface of the main body. A photoelectric type that has an integrally formed circular tray and a cutout for draining water at any location on the tray.