JPH06249965A - Ceiling type automatic heat ray-sensitive switch - Google Patents

Abstract

PURPOSE:To impart perturbation when a movable body containing a heat ray sensor is rotated with respect to a case. CONSTITUTION:An exposed window 16 is made in the center of the rear surface of a case 1 to be fixed to the ceiling and a planar retainer 45 provided with a holding opening 45a is secured to the central part in the case 1. The retainer 45 is integrally formed with a continuous spring piece 45b at a point on the periphery of the holding opening 45a. A spherical movable body 40 containing a heat ray sensor is interposed between the exposed window 16 and the holding opening 45a. A position regulating recess 41b is made in the surface of the movable body 40 and a contactor 47 provided on the rear surface side of the spring piece 45b is pressed against the bottom face of the recess 41b. Rear surface of the contactor 47 is engaged with the bottom face of the recess 41b thus forming a large number of recesses 41c.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling-mounted heat ray detection type automatic switch for automatically turning on / off a load by detecting a heat ray emitted from a human body or the like.

[0002]

2. Description of the Related Art As a ceiling-mounted heat ray detection type automatic switch of this type, as shown in FIG. 13, a heat ray sensor 2 such as a pyroelectric element for detecting heat rays radiated from a human body, and a heat ray sensor 2 are used. A control unit 3 that outputs a control signal until a predetermined time elapses from the time when the
And a switch element 4 such as a relay that is turned on / off in response to a control signal from

Since the ceiling-mounted heat ray detection type automatic switch is used for the purpose of blinking the illumination according to the comings and goings of people in the room, it is necessary to adjust the detection area of the heat ray sensor 2. In order to enable such adjustment, the orientation of the detection surface of the heat ray sensor 2 is adjusted by housing the heat ray sensor 2 in a movable body that is rotatable with respect to a case attached to the ceiling. Is being considered.

[0004]

By the way, in the conventional ceiling mount type heat ray sensing type automatic switch, the movable body is mounted so as to move smoothly with respect to the case. There is a problem that the detection area is changed only by external vibration acting on the movable body.

The present invention is intended to solve the above-mentioned problems, and by giving a nodal motion to the movement of the movable body, it is possible to detect the movement of the movable body by light touching or vibration from the outside. It is an object of the present invention to provide a ceiling mount type heat ray sensing type automatic switch in which the area does not change.

[0006]

In order to achieve the above object, the present invention is based on a case attached to a ceiling, a heat ray sensor for detecting a heat ray radiated from a human body, and an output of the heat ray sensor. A switch element that is turned on and off according to the presence or absence of the human body, and a transmission part that accommodates the heat ray sensor and a portion through which the heat ray penetrates, facing the detection surface of the heat ray sensor. A spherical movable body rotatably attached to the case so that the transparent portion is exposed through the window, and a movable body having a holding opening facing the exposure window. And a pressing body fixed to the case so as to be disposed between the position control recess and the outer peripheral surface of the movable body inside the holding opening. Multiple recesses on the bottom of the place There is formed, characterized by comprising coupled to body presser contacts give articulating the rotation of the movable body by the tip elastically contact the recesses of the one with the rotation of the movable body.

The inventions of claims 2 to 7 are preferred embodiments. In the invention of claim 2, the pressing body is plate-shaped, and the contactor is attached to a tip end portion of a spring piece that is continuously and integrally projected from one position on the periphery of the holding opening in the pressing body, and the contact piece is attached by the spring piece. It is characterized in that it is biased toward the movable body. In the invention of claim 3, the pressing body is plate-shaped, and the contactor is attached to a tip end portion of a spring piece which is separate from the pressing body fixed to one position on the peripheral portion of the holding opening in the pressing body. And is biased toward the movable body by the spring piece.

In the invention of claim 4, the pressing body is provided with a cover plate which covers substantially the entire upper surface of the movable body, the contactor is integrally provided with a shaft portion which is inserted into the cover plate, and the shaft portion is provided with the cover plate. It is characterized in that a pair of elastic pieces that come into contact with the front and back surfaces and apply a spring force in the axial direction of the shaft portion are integrally formed and are urged toward the movable body by the elastic pieces. In the invention of claim 5, the pressing body is plate-shaped, and the contactor is formed in an intermediate portion of the spring piece integrally continuous with the pressing plate so as to straddle two positions of the peripheral portion of the holding opening in the pressing body. It is characterized in that it is fixed integrally and is urged toward the movable body by the spring piece.

In a sixth aspect of the present invention, the pressing body has a plate shape, and the contactor is fixed to the pressing plate in such a manner that the contact extends over two portions of the peripheral portion of the holding opening in the pressing body. Is integrally fixed to an intermediate portion of a separate spring piece, and is biased toward the movable body by the spring piece. In the invention of claim 7, the pressing body is a cylindrical shape having a vertical centerline, and the contactor is a spring which is separate from the pressing body and is fixed at one position on the peripheral portion of the holding opening of the pressing body. It is characterized in that it is attached to the tip end of the piece and is urged toward the movable body by the spring piece.

[0010]

According to the above construction, the heat ray sensor is provided in the spherical movable body, and the periphery of the exposure window provided in the case so as to expose the transparent portion of the movable body for introducing the heat ray to the heat ray sensor,
The movable body is arranged between the holding body fixed to the case and the peripheral edge of the holding opening, and the position regulating recess is formed on the outer peripheral surface of the movable body inside the holding opening. Since a plurality of dents are formed on the bottom surface of the position regulating recess and the tip of the dent makes elastic contact with one of the dents as the movable body rotates, a contact is provided at a fixed position on the case. When the child elastically contacts the dent, nodal motion is given when the movable body rotates. That is, the direction of the movable body does not change and the direction of the movable body is changed to the extent that the movable body is lightly touched or external vibration is applied to the movable body due to the engagement between the contactor and the depression. In doing so, there is a click feeling, which gives a reliable operation feeling, which leads to improvement in reliability.

[0011]

【Example】

(Embodiment 1) FIG. 13 is a schematic configuration of an internal circuit. Like the conventional configuration, a heat ray sensor 2 including a pyroelectric element for detecting a heat ray from a human body and the like, and the heat ray is detected by the heat ray sensor 2. The control unit 3 outputs a control signal until a predetermined time elapses from a time point, and the switch element 4 including a relay that is turned on / off in response to the control signal from the control unit 3. In addition, a power supply terminal Ta commonly connected to one end of the power supply path to the control unit 3 and one end of the switch element 4, and the control unit 3
The common terminal Tb connected to the other end of the power feeding path and the load terminal Tc connected to the other end of the switch element 4. Here, the power supply terminal Ta, the common terminal Tb, and the load terminal Tc are
Each has a pair of connection parts 5a and 5b. An operation mode changeover switch 6 is inserted between the connection point between the control unit 3 and the switch element 4 and the power supply terminal Ta. The operation mode changeover switch 6 includes a power supply terminal Ta and a load terminal T.
of the control unit 3, the switch element 4, and the load terminal Tc, the contact point a serving as the first contact point portion inserted between the contact point c and the contact point c serving as the second contact point portion connected in series to the switch element 4. And a contact point c which is not connected to any of them. When the contact a is selected, the power supply terminal Ta and the load terminal Tc are connected without passing through the switch element 4, so that the forced on state is always on, and when the contact b is selected, the control unit 3 and the switch are selected. Since the element 4 is connected to the power supply terminal Ta, the load is turned on / off in response to the detection of heat rays by the heat ray sensor 2, and when the contact c is selected, the control unit 3, the switch element 4, the load Since all of the terminals Tc are disconnected from the power supply terminal Ta, they are in a forced off state which is always off. As described above, by providing the operation mode changeover switch 6, it is possible to release the state in which the load is automatically turned on / off by detecting the heat ray and to turn the load on / off by a manual operation. Further, the control unit 3 is provided with a variable resistor 7 for varying the time for sending the control signal.

By the way, as shown in FIG. 1, the above-mentioned circuit of the case 1 is formed by connecting a cover 11 having a lower surface opening to the upper surface side of the central portion of a base 12 having a substantially disk-shaped flange 13. It is stored inside. The cover 11 is connected to the base 12 by an assembly screw 18 which is a tapping screw that is screwed onto the base 12. The terminal block 14 protruding from the top of the cover 11 accommodates power connection terminals Ta, common terminals Tb, and load connection terminals Tc (not shown). A plurality of electric wire insertion ports 15 for inserting electric wires are opened. The quick-connect terminal is a terminal that mechanically and electrically couples the electric wire inserted from the electric wire insertion port 15 by sandwiching the electric wire between the terminal plate and a locking spring which is a leaf spring. In addition, two locking springs are provided for each terminal plate (or two independent spring pieces are provided for each locking plate) so that two electric wires can be sandwiched between each terminal plate. By providing two electric wire insertion ports 15 for each terminal, the connecting portions 5a, 5
It has a structure in which two b are provided.

A terminal cover 20 is detachably attached to the terminal block 14 projecting from the upper portion of the cover 11. The terminal cover 20 covers the upper surface of the terminal block 14 over the entire surface, and by closing the wire insertion port 15, the cover 11 is covered.
It prevents foreign matter (especially water) from entering the inside. The terminal cover 20 is coupled to the terminal block 14 by a cover screw 21 screwed onto the terminal block 14. Wire insertion port 1
The electric wire inserted in 5 is introduced between the terminal block 14 and the terminal cover 20 from the diagonally upper right in FIG. 1, and even if water enters the terminal cover 20 along the electric wire, the electric wire insertion port 15 I try not to reach.

A circular exposure window 16 is formed in the center of the base 12.
The movable body 4 is formed in the exposed window 16 and has a spherical shape.
0 is attached to the case 1 so that the angle can be adjusted. A circuit board (not shown) on which the heat ray sensor 2 and the like are mounted is installed in the movable body 40, and lead wires connected to the circuit board are drawn out from the movable body 40. In the lower half of the movable body 40, a light receiving lens 42 formed of a Fresnel lens is provided as a transmitting portion that collects heat rays to the heat ray sensor 2. That is, the movable body 40 is a hemispherical movable body main body 41.
And a hemispherical light-receiving lens 42 connected to the lower surface of the movable body 41. The light-receiving lens 42 is an assembly of a large number of lens regions, and is configured to be able to detect a minute movement of the heat source as a change in the heat ray by changing the amount of light collected by the heat ray sensor 2 depending on the direction. . A pair of shaft pins 41a are provided on the outer peripheral surface of the opening peripheral edge of the movable body 41 so as to be separated from each other in a substantially diametrical direction.
Further, on the upper surface of the movable body 41, a position regulating recess 41 is formed.
b is formed, and a large number of recesses 41c are formed on the bottom surface of the position regulating recess 41b.

By the way, the exposed window 16 in the base 12
A pair of guide ribs 17 having a substantially U-shaped horizontal cross section are formed on the peripheral edge of the guide rib 17 so that the shaft pins 41a projecting from the movable body 40 are engaged with the guide ribs 17. That is, when the shaft pin 41a is engaged with the guide rib 17, the movement of the movable body 40 is regulated so as to move the shaft pin 41a within the plane including the guide ribs 17. The rotation in the plane including 17 and the rotation around the shaft pin 41a are performed.

The movable body 40 is fixed to the upper surface side of the base 12 by abutting the periphery of the opening of the exposed window 16 provided on the base 12 near the opening of the movable body 41.
5, the movable body main body 41 is inserted into the substantially circular holding opening 45a.
It is arranged between 5 and 5. The pressing body 45 is formed of a sheet metal having elasticity, and is provided with a spring piece 45b that is integrally projected from one location on the peripheral portion of the holding opening 45a.
Has a distal end portion extended so as to be located above the central portion of the holding opening 45a. As described above, since the spring pieces 45b are continuously formed integrally with the pressing body 45, the number of constituent parts is reduced. As shown in FIG. 2, a contact 47 is held at the tip of the spring piece 45b. The contact 47 has a mounting protrusion 47a that is inserted into the spring piece 45b.
Is provided on the upper portion and has a smooth convex curved surface on the lower surface, and is made of synthetic resin having excellent lubricity. In a state where the peripheral portion of the pressing body 45 is fixed to the base 12 by the fixing screw 46 which is a tapping screw, the contact 47 is inserted into the position regulating recess 41b, and the spring force of the spring piece 45b causes the position regulating recess 41b. It is adapted to elastically contact the bottom surface of the place 41b.

Therefore, the movable body 40 is pressed downward by the spring force of the spring piece 45b, and the movable body 40 is sandwiched between the contact edge 47 and the opening peripheral edge of the exposure window 16 provided in the base 12. Will be. That is, when the movable body 40 rotates with respect to the base 12, the lower end portion of the contact 47 is inserted into one of the recesses 41c formed in the bottom surface of the position regulating recess 41b, and as a result, A rotation is given to the rotation of the movable body 40. When the rotation of the movable body 40 is given a rotation, the movable body 4
The direction of the movable body 40 does not change even if 0 is slightly touched or external vibration is applied, improving reliability and
A click feeling can be obtained when the movable body 40 is rotated. Further, by inserting the contact 47 into the position regulating recess 41b, the movable body 40 rotates within a range in which the contact 47 is accommodated in the peripheral wall of the position regulating recess 41b. When an external force acts upward on the movable body 40, the upper part of the movable body 41 abuts on the peripheral edge of the holding opening 45a, whereby the upward movement of the movable body 40 is restricted. Further, in order to prevent the pressing body 45 from being deformed with the rotation of the movable body 40, a reinforcing piece 45c bent upward is formed around the entire periphery of the pressing body 45.

A pair of elongated holes 31 are formed in the flange 13, and fixing screws 32 are inserted through the elongated holes 31. The mounting member 30 is inserted through the middle portion of the fixing screw 32, and the nut 33, which is prevented from rotating with respect to the mounting member 30, is screwed into the tip portion of the fixing screw 32. Mounting bracket 3
The base end portion of 0 is pivotally attached to the upper portion of the cover 11 so that the tip end portion can change the distance from the flange 13. That is, a pair of shaft protrusions 30a is provided on both sides at the base end portion of the mounting bracket 30, and the shaft protrusions 30a cover the cover 1
It is pivotally attached to a pair of bearings 37a provided on the side of the terminal block 14 at the upper part of the terminal block 14. Further, a return spring 34 is connected to the mounting member 30, and the tip end portion is biased in a direction away from the flange 13. Further, the flange 13 has
A fixing hole 19 into which a box screw that is screwed into an embedded box such as a switch box for wiring equipment can be inserted is formed.

However, when the case 1 is mounted in the mounting hole formed in the ceiling panel, the fixing screw 32 is loosened and the tip of the mounting bracket 30 is separated from the flange 13 by the spring force of the return spring 34 (ie , And reduce the distance between the ends of the mounting bracket 30). In this state, the cover 11 and the fixing screw 32 are inserted into the mounting hole, and the flange 13 is brought into contact with the surface of the ceiling panel. Next, when the fixing screw 32 is tightened, the tip portion of the mounting bracket 30 comes close to the flange 13, and the flange 13
The peripheral portion of the mounting hole can be sandwiched between the mounting bracket 30 and the mounting bracket 30. After fixing the case 1 to the ceiling panel as described above, the decorative plate 25 is detachably attached so as to cover the lower surface of the flange 13. That is, by partially engaging the inner peripheral surface of the peripheral wall of the decorative plate 25 and the outer peripheral surface of the flange 13 with each other, the decorative plate 25
Is removably coupled to the base 12.

(Embodiment 2) This embodiment has a configuration shown in FIG. That is, in the first embodiment, the spring piece 45b is formed integrally with the pressing body 45 continuously, but in the present embodiment, as shown in FIG. 4, the pressing body 45 and the spring piece 45b are formed.
And are formed separately. A pair of parallel holding pieces 45d formed by cutting and raising a part of the holding body 45 is provided at one location on the periphery of the holding opening 45a of the holding body 45, and a spring piece 45b of the spring piece 45b is provided between both holding pieces 45d. The base is arranged to prevent the spring piece 45b from being displaced. Further, the spring piece 45b is fixed to the base 12 together with the pressing body 45 by the fixing screw 46 that fixes the pressing body 45 to the base 12.
Fixed to.

In this structure, the pressing body 45 and the spring piece 45 are arranged.
A different material can be used for b, for example, the pressing body 45 can be a thick metal plate that is less deformed by an external force, and the spring piece 45b can be a metal plate having excellent elasticity. Therefore, the pressing piece 45 does not have the reinforcing piece 45c. Other configurations are similar to those of the first embodiment. Further, in the first and second embodiments, since the pressing body 45 and the spring piece 45b are formed of sheet metal, it is possible to make the vertical dimension relatively small.

(Embodiment 3) This embodiment has a configuration shown in FIG. That is, the pressing body 45 is formed of a synthetic resin molded product in a shape having a dome-shaped cover plate 45h that covers substantially the entire upper surface of the movable body 40, and fixing pieces 45e project from two positions on the outer peripheral surface of the opening periphery. In the first embodiment, elastic pieces 47d and 47e having a spring force are continuously and integrally formed on the contact 47 made of a synthetic resin molded product, and the contact 47 is connected to the pressing body 45. Be different.

More specifically, as shown in FIG. 6, the pressing body 45 includes a dome-shaped cover plate 45h that covers the upper surface of the movable body 40, and a holding opening 45a that is the inner peripheral edge of the lower end of the pressing body 45. It is formed so that the upper part of the movable body 40 is inserted into the inside. A through hole 45f is formed through the central portion of the cover plate 45h. On the other hand, the contact 47 is
A shaft portion 47c that is inserted into the through hole 45f is provided.
A pair of elastic pieces 47d, which project obliquely downward so as to widen the mutual distance downward, are integrally formed continuously, and the lower part of the shaft portion 47c widens the mutual distance upward. As described above, the pair of elastic pieces 47e projecting obliquely upward are integrally formed. It goes without saying that the lower surface of the contactor 47 is formed into a smooth convex curved surface.

Therefore, when the shaft portion 47c of the contact 47 is inserted into the through hole 45f of the pressing body 45, the peripheral portion of the through hole 45f is sandwiched between the elastic piece 47d and the elastic piece 47e, and the contact 47 is pressed. It is bound to the body 45. Also,
The movable body 40 is biased downward by the spring force of the elastic piece 47e. In the above configuration, a material having a large mechanical strength is used for the pressing body 40, and a material having excellent lubricity and elasticity is selected for the contact 47, whereby the material can be selected according to the purpose. is there. Other configurations are similar to those of the first embodiment.

(Embodiment 4) This embodiment is constructed as shown in FIG. 7, and has a pressing body 45 and a contactor 4.
7 is a synthetic resin molded product and is integrally formed. That is, the pressing body 45 is formed in a flat plate shape, and as shown in FIG. 8, projecting pedestals 45i are continuously and integrally projected at two portions of the peripheral portion of the holding opening 45a where the fixing screws 46 are inserted. To be done. A spring piece 45g is continuously and integrally installed between the two protrusions 45i. The spring piece 45g is formed in a shape meandering in the vertical direction and is flexible in the vertical direction, and the contact 47 is continuously and integrally projected on the lower surface of the central portion of the spring piece 45g. The other structure is the same as that of the first embodiment. In the structure of the present embodiment, the pressing body 45 and the contact 47 are continuously and integrally formed, and the spring piece 45g for urging the contact 47 downward is also continuous. Since it is integrally formed, there is an advantage that the number of constituent parts is reduced.

(Embodiment 5) This embodiment has the structure shown in FIG. 9, and compared with the structure of Embodiment 4, it has a member in which a protrusion 45i, a spring piece 45g, and a contact 47 are integrally formed. ,
The difference is that the pressing plate 45 is a separate member. That is, in the configuration of the fourth embodiment, since the pressing body 45 is a molded product of synthetic resin and is continuously and integrally formed with the spring piece 45g that requires flexibility, the peripheral portion of the holding opening 45a is formed. In order to regulate the movement of the movable body 40, the pressing body 4
Although it was necessary to form 5 relatively thick, in the present embodiment, the pressing body 45 requiring mechanical strength and the spring piece 45g requiring flexibility are separated from each other.
As shown in FIG. 5, the pressing body 45 can be made of a thin material having high mechanical strength.
In practice, a metal plate is used as the pressing body 45 to improve the mechanical strength, and the contact 47 and the spring piece 45g are integrally formed of a synthetic resin molded product excellent in lubricity and elasticity. Here, if the material is selected so that the spring constant of the spring piece 45g can be set small, it is possible to reduce the change in the feeling of operation even if there is some dimensional error. Other configurations are the same as those in the fourth embodiment.

(Embodiment 6) This embodiment has the structure shown in FIG.
The shape of No. 5 is changed. That is, the pressing body 45
Is formed in a cylindrical shape having a vertical centerline, and is formed of a synthetic resin molded product in a shape having fixing pieces 45e at two locations on the outer peripheral surface. Therefore, as shown in FIG. 12, the lower end edge of the pressing body 45 becomes the holding opening 45a. Here, since the pressing body 45 has a cylindrical shape having a center line in the up-down direction, it is possible to obtain a large mechanical strength for restricting the upward movement of the movable body 40. Spring piece 45
b is formed of sheet metal, and one end thereof is fixed to the base 12 together with the pressing body 45 by a fixing screw 46 that fixes the pressing body 45 to the base 12.

In the structure of this embodiment, the mechanical strength of the pressing body 45 is ensured, the upward movement of the movable body 40 is surely restricted, and the spring constant of the spring piece 45b is made small so that the movable body is caused by a dimensional error. It is possible to use a material having excellent lubricity and wear resistance for the contact 47 while reducing the change in the operation feeling of 40. Since other configurations are the same as those in the first embodiment, description thereof will be omitted.

[0029]

According to the present invention, a heat ray sensor is provided in a spherical movable body, and a periphery of an exposure window provided in the case so as to expose a transparent portion of the movable body for introducing heat rays into the heat ray sensor, and the case. Since the movable body is arranged between the fixed holding body and the peripheral edge of the holding opening, the position regulating recess is formed on the outer peripheral surface of the movable body inside the holding opening. Since a plurality of depressions are formed on the bottom surface of the position regulating recess and the tip of the tip elastically contacts with any of the depressions as the movable body rotates, the contact is provided at a fixed position on the case. By elastically contacting the depression, a node motion is given when the movable body rotates. That is, the contact between the contact and the depression causes the direction of the movable body to remain unchanged and the stability of the detection region to be improved, to the extent that the movable body is lightly touched or vibrations from the outside act on the movable body. There are advantages,
In addition, when changing the direction of the movable body, there is an advantage that a click feeling is given and a reliable operation feeling is given, which leads to improvement in reliability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an overall configuration of a first embodiment.

FIG. 2 is a sectional view of a main part of the first embodiment.

FIG. 3 is an exploded perspective view showing the overall configuration of the second embodiment.

FIG. 4 is a sectional view of a main part of the second embodiment.

FIG. 5 is an exploded perspective view showing the overall configuration of the third embodiment.

FIG. 6 is a sectional view of a main part of the third embodiment.

FIG. 7 is an exploded perspective view showing the overall configuration of the fourth embodiment.

FIG. 8 is a sectional view of a main part of the fourth embodiment.

FIG. 9 is an exploded perspective view showing the overall configuration of the fifth embodiment.

FIG. 10 is a sectional view of a main part of the fifth embodiment.

FIG. 11 is an exploded perspective view showing the overall configuration of the sixth embodiment.

FIG. 12 is a sectional view of a main part of the sixth embodiment.

FIG. 13 is a block circuit diagram of an example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 case 2 heat ray sensor 3 control part 4 switch element 16 exposure window 40 movable body 41b position regulating recess 41c recess 42 light receiving lens 45 pressing body 45a holding opening 45b spring piece 45g spring piece 45h cover plate 47 contactor 47c shaft section 47d elastic piece 47e elastic piece

Claims (7)

[Claims] 1. A case attached to a ceiling, a heat ray sensor for detecting heat rays radiated from a human body, and a switch element which is turned on / off according to the presence or absence of the human body based on the output of the heat ray sensor. , The heat ray sensor is housed, and the heat ray sensor is provided with a transparent portion at a portion facing the detection surface of the heat ray sensor so that the transparent portion is exposed through an exposure window formed in the lower surface of the case. A holding member fixed to the case so as to have the attached spherical movable body and a holding opening facing the exposure window so that the movable body is arranged between the peripheral edge of the exposure window and the peripheral edge of the holding opening. A position regulating recess is formed on the outer peripheral surface of the movable body inside the holding opening, and a plurality of recesses are formed on the bottom surface of the position regulating recess. One of the depressions will be rotated A ceiling-mounted heat-ray-sensing automatic switch, characterized in that a contactor that gives a rotational motion to a movable body by elastically contacting an end portion is connected to a pressing body. 2. The pressing body is plate-shaped, and the contactor is attached to a leading end portion of a spring piece which is continuously and integrally projected from one position on the periphery of the holding opening in the pressing body, and the movable piece is attached by the spring piece. The ceiling-mounted heat-ray-sensing automatic switch according to claim 1, wherein the heat-sensitive automatic switch is mounted on the ceiling. 3. The pressing body is plate-shaped, and the contactor is attached to a tip end portion of a spring piece which is separate from the pressing body fixed to one position on the peripheral portion of the holding opening in the pressing body, The ceiling-mounted heat ray detection type automatic switch according to claim 1, wherein the spring piece is biased toward the movable body. 4. The presser body includes a cover plate that covers substantially the entire upper surface of the movable body, the contactor integrally includes a shaft portion that is inserted into the cover plate, and the shaft portion contacts the front and back surfaces of the cover plate, respectively. The ceiling-mounted heat wire according to claim 1, wherein a pair of elastic pieces that contact each other and apply a spring force in the axial direction of the shaft portion are integrally formed, and are biased toward the movable body by the elastic pieces. Sensitive automatic switch. 5. The pressing body is plate-shaped, and the contactor is integrally formed at an intermediate portion of a spring piece that is integrally continuous with the pressing plate so as to straddle two positions on the periphery of the holding opening in the pressing body. The ceiling-mounted heat ray sensing type automatic switch according to claim 1, wherein the switch is fixed and urged toward the movable body by a spring piece. 6. The pressing body is plate-shaped, and the contactor is a spring separate from the pressing body fixed to the pressing plate so as to straddle two positions around the periphery of the holding opening in the pressing body. The ceiling-mounted heat ray sensing type automatic switch according to claim 1, wherein the ceiling-mounted heat ray sensing type automatic switch is integrally fixed to an intermediate portion of the piece and is biased toward a movable body by a spring piece. 7. The pressing body has a cylindrical shape having a vertical center line, and the contactor is a spring piece which is separate from the pressing body and is fixed at one position on the peripheral portion of the holding opening of the pressing body. The ceiling-mounted heat ray sensing type automatic switch according to claim 1, wherein the switch is attached to a front end portion and is biased toward a movable body by a spring piece.