JP2005135797A - Automatic switch with heat ray sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic switch with a heat ray sensor facilitating assembly and manufacturing. <P>SOLUTION: This automatic switch with a heat ray sensor comprises: a heat ray sensor TP for sensing a heat ray emitted from a human body: a switch SW inserted in a power feed path from a power supply to a load and turned on/off according to the output of the heat ray sensor; and a lens block 3 having a condenser lens 3A for condensing the heat ray from a sensing range on a reception part of the heat ray sensor TP. The lens block 3 is rotatably held in a housing having a window hole for exposing the condenser lens 3A so as to change the sensing range. Since the lens block 3 can simply be assembled only by fixing it to the housing by a lens block fixing part 4A with a rotation part 2A having the condenser lens fixed and a rotative holding part 3A rotatably and integrally housed, the entire automatic switch with the heat ray sensor can easily be manufactured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an automatic switch with a heat ray sensor that detects the presence or absence of a person by detecting a heat ray emitted from a human body and controls a load.

  2. Description of the Related Art Conventionally, there is provided an automatic switch with a heat ray sensor that includes a heat ray sensor that detects the presence or absence of a person by detecting a heat ray emitted from a human body and controls a load according to the output of the heat ray sensor (for example, a patent) Reference 1). This type of automatic switch with a heat ray sensor is used for control such that, for example, when the load is illumination, the illumination is turned on when a person enters the room and the illumination is turned off when the person leaves the room.

  For example, an automatic switch with a heat ray sensor of this type is shown in FIG. This automatic switch with a heat ray sensor is attached to a ceiling, and is an upper surface in FIG. 6 of a flange portion 11 that contacts a lower surface of a peripheral portion of a mounting hole (not shown) formed in the ceiling surface. A housing is provided that includes a body 1 having a cylindrical portion 12 projecting from a central portion, and a cover 2 that is a bottomed cylindrical shape having an open lower surface and is coupled to and closed by the cylindrical portion 12. Four assembly pieces 12a project from the upper end of the cylindrical portion 12, and the assembly protrusions 21 projecting from the outer peripheral surface of the lower end portion of the cover 2 are engaged with assembly holes 12b penetrating the assembly piece 12a. As a result, the body 1 and the cover 2 are coupled.

  The housing includes a spherical rotating body 7 in which the heat ray sensor TP is accommodated, a first printed wiring board P1 on which a switch SW including a relay that is turned on and off according to the output of the heat ray sensor TP, and the switch SW. Second printed wiring on which an element having a manually operated handle such as a changeover switch (not shown) for setting operation and a variable resistor (not shown) for setting the sensitivity of the heat ray sensor TP is mounted. The board P2 is accommodated. Here, the second printed circuit board P2 is fixed on the upper side of the rotating body with the mounting surface facing downward, and the handle can be operated from the lower side of the body 1. The first printed wiring board P1 is fixed on the upper side of the second printed circuit board P2 with the mounting surface facing upward. In addition to the switch SW, three terminal portions 6 for connecting the switch SW and an electric wire (not shown) are mounted on the first printed wiring board P1. The terminal portion 6 is a so-called quick connection terminal, and two terminal plates 61 electrically connected to both ends of the switch SW, and wires inserted from the wire insertion holes 22 provided in the cover 2 are respectively connected to the terminal plate. The two locking springs 62 locked between the two locking springs 62 and the two locking springs 62 when pressed by a jig such as a minus driver inserted from the release hole 23 provided in the cover 2. At the same time, and a release button 63 for releasing the lock. If a power supply side electric wire is connected to one terminal plate 61 and a load side electric wire is connected to one terminal plate 61, the power supply to the load can be turned on and off by the switch SW.

  Further, on both sides of the upper surface of the flange portion 11 with the cylindrical portion 12 sandwiched, scissors 8 for fixing the housing with the ceiling surface sandwiched between the flange portion 11 are attached. The scissors metal fitting 8 has a rectangular parallelepiped shape whose one side surface is directed to the cylinder portion 12 and is open at one side surface away from the cylinder portion 12, and penetrates both ends in the longitudinal direction of the column 81. A tightening screw 82, and a pinching piece 83 that is partly housed in the support column 81 and screwed into the tightening screw inside the support column 81. A notch 81 a communicating with the opening is provided at the upper end of both side surfaces adjacent to the opening surface of the support column 81. The clip piece 83 can be inserted into the notch 81a when the clip piece 83 is positioned at the upper end of the support column 81. When the clamping screw 82 is turned from a state in which the clip piece 83 is inserted into the cutout 81a, the clip piece 83 is inserted. Comes out of the notch 81a and moves downward along the opening surface of the column 81. The tightening screw 82 can be rotated by inserting a driver from a through hole 11c provided in the flange portion 11, and the tightening screw 82 is in a state where the upper surface of the flange portion 11 is in contact with the ceiling surface. , The pinching piece 83 moves out of the notch 81 a and moves toward the flange portion 11, and the ceiling surface can be pinched between the pinching piece 83 and the flange portion 11. Further, in the vicinity of the portion of the flange portion 11 to which the scissor fitting 8 is attached, a screw insertion for inserting a screw for directly attaching the flange portion 11 to the ceiling surface or a screw coupled to a box embedded in the ceiling is inserted. The hole 11d is penetrated. Furthermore, the decorative plate 5 which covers the flange part 11 between the ceiling surfaces is attached to the housing. The decorative plate 5 has a through hole 51 through which the rotating body 7 is exposed.

The rotating body 7 has a hemispherical shape, a condensing lens 71 that collects heat rays from the detection range on the light receiving surface of the heat ray sensor, a third printed wiring board P3 on which the heat ray sensor TP is mounted, and a hemispherical shape. A third printed wiring board P3 is attached to the inside and is coupled to the condenser lens 71 to form a spherical frame 72, and an annular holding frame 73 that covers the coupling portion of the condenser lens 71 and the rotational frame 72. It consists of. A window hole (not shown) through which the condenser lens 71 is exposed is provided vertically at the center of the flange portion 11. Further, an intermediate portion of the presser fitting 9 having both ends screwed to the flange portion 11 by the mounting screws SC is positioned above the rotating body 7. A coil spring SP that presses the rotating body 7 against the flange portion 11 is inserted between the presser fitting 9 and the rotating body 7. Further, a cylindrical shaft portion 72a is protruded at two locations across the opening on the outer surface of the rotating frame 72, and the shaft portion 72a is formed at two locations sandwiching the window hole on the upper surface of the flange portion 11. By being housed in a recess (not shown) communicating with the hole, the rotating body 7 can rotate around the shaft portion 72a. The detection range can be changed by rotating the rotating body 7 and changing the direction of the condenser lens 71.
Japanese Patent Laid-Open No. 2003-7180 (page 4-6, FIG. 2)

  However, in the above-described configuration, the pressing metal 9 that is screwed to the flange portion 11 by a mounting screw SC or the like provided on the upper side of the rotating body 7 is necessary as a member for rotatably holding the rotating body 7 in the housing. Further, the coil spring SP is repelled when it is manufactured by assembling these members so that the coil spring SP for pressing the rotating body 7 against the flange portion 11 is inserted between the presser fitting 9 and the rotating body 7. There has been a problem that assembly becomes difficult due to force and deformation.

  The present invention has been made in view of the above-mentioned freedom, and an object thereof is to provide an automatic switch with a hot-wire sensor that can be easily assembled and manufactured.

  The invention according to claim 1 is a heat ray sensor that detects a heat ray emitted from a human body, a switch that is inserted into a power supply path from a power source to a load and is turned on / off according to the output of the heat ray sensor, and a heat ray sensor from a detection range. A lens block having a condensing lens for condensing on the light receiving unit, a window hole for exposing the condensing lens, and a lens block that is rotatably held so as to change the detection range, and has a switch and a heat ray sensor inside. A heat ray sensor-equipped automatic switch including a housing in which the lens block is housed and fixed, wherein the lens block has a rotating part to which a condenser lens is attached, a rotating holding part for holding the rotating part at a predetermined angle, and these The rotating part and the rotation holding part are rotatably housed inside, and comprise a lens block fixing part fixed to the housing.

  According to this configuration, the lens block including the rotating portion can be handled as a set of blocks by the lens block fixing portion, and the rotating member can be assembled simply by attaching the lens block fixing portion to the housing. Compared to the case where the lens block is fixed, it is much easier to assemble and manufacture the lens block, and it is possible to easily assemble and manufacture the heat ray sensor even if it is not a skilled worker. Easily.

  The invention of claim 2 is characterized in that, in the invention of claim 1, each of the outer peripheral surface of the rotating portion and the inner peripheral surface of the rotation holding portion is formed into a spherical shape in which both are in surface contact.

  According to this configuration, since the rotating portion rotates in a state where the rotating holding portion and the spherical surface are in contact with each other and the brake is applied, the rotating portion can be reliably held at a predetermined position without being easily rotated, and thus stable. Range detection can be performed.

  The invention of claim 3 is characterized in that, in the invention of claim 1, a spring portion for pressing the rotating portion toward the housing is formed integrally with the rotation holding portion.

  According to this configuration, the rotating part can be surely pressed and positioned against the window hole of the housing, and compared with the one in which the rotating part is pressed and positioned by a holding metal fitting using a separate coil spring from the rotating body. Thus, the number of parts is small and the structure is simple, and assembly can be easily performed.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the rotation holding portion is provided with a protrusion for preventing the spring from being plastically deformed when the spring portion is bent by an external force. .

  According to this configuration, even if the spring portion of the rotation holding portion is bent by an external force when adjusting the rotation of the lens block, the protrusion hits the bottom surface of the lens block fixing portion, so that an excessive overload is not applied to the spring. The plastic deformation of the spring can be prevented, and the rotating portion can be stably pressed into the window hole of the housing.

  In the present invention, the lens block including the rotating part can be handled as a set of blocks by the lens block fixing part, and the rotating member can be assembled simply by attaching the lens block fixing part to the housing. Compared to the case where the rotating member is fixed by a metal fitting, the assembly and manufacture are facilitated, and it is possible to easily assemble and manufacture without a skilled worker, and it is also relatively easy to perform automatic assembly by an automatic machine or the like. .

  The best mode for carrying out the present invention will be described below with reference to the drawings. In the following, an automatic switch with a heat ray sensor attached to the ceiling will be described as an example, but the present invention is also applicable to an automatic switch with a heat ray sensor attached to a wall surface, for example.

  Since the basic configuration of this embodiment is the same as that of the conventional example, common portions are denoted by the same reference numerals, description thereof is omitted, and only different portions are described.

  In the present embodiment, the heat ray sensor TP is mounted on the second printed wiring board P2, and the lens block 3 (see FIG. 2) that is provided with a condensing lens 31 and is rotatably held with respect to the housing so as to change the detection range. ) In place of the rotating body.

  More specifically, the lens block 3 includes a condensing lens 3A formed in a hemispherical shape, a cylindrical rotating portion 2A whose one end is closed by the condensing lens 3A, and the rotating portion 2A so that the rotating portion 2A is rotatable. The rotation holding portion 1A that stably holds the lens in a tilted state, and the rotation portion 2 and the lens block fixing portion 4A that accommodates the rotation holding portion 1A in a rotatable state. The block fixing portion 4A is fixed to the housing 1 by engaging the engaging claw 400 with the mounting hole 15 of the housing 1 (flange portion 11). According to this configuration, since the lens block 3 including the rotating portion 2A can be handled as a set of blocks by the lens block fixing portion 4A, the rotating lens member can be easily assembled.

The rotation holding portion 1A has a ring shape as a whole, and has an inner peripheral surface that is recessed into a spherical shape. As shown in FIG. When it is provided and fixed to the housing 1, the spring portion 100 can press the rotating portion 2 </ b> A against the window hole 51 so that it can be positioned.
The outer peripheral surface of the rotating part 2A is formed so as to protrude into a spherical shape centering on a position surrounded by the rotating part 2A. In addition, cylindrical shaft protrusions each having an axis passing through the center of the spherical surface protrude from two positions sandwiching the center of the spherical shape of the outer peripheral surface of the rotating portion 2A.

  Further, the rotation holding portion 1A is provided with engagement holes 102 on both sides where shaft projections provided on the outer periphery of the rotation portion 2A engage with the intermediate position, and the rotation portion 2A exposed from the window hole 51 by the person. When adjusting the position at which the condenser lens 3A is tilted by pushing with a finger, the rotation holding unit 1A and the rotation holding unit 1A can simultaneously rotate 360 ° in the lens block fixing unit 4A at the same time. The detection range can be adjusted by stopping at the position and further tilting the rotating part 2A up and down.

  Since the outer peripheral surface of the rotating portion 2A and the inner surface of the rotation holding portion 1A are in surface contact with each other when they are rotated, the braking force is just right on the rotating portion 2A during rotation adjustment. The adjustment can be facilitated without causing excessive rotation.

  The condensing lens 3A is a multifocal lens made of, for example, a Fresnel lens. The focal point of the condensing lens 3A and the center of the light receiving surface TP1 of the heat ray sensor TP are both positioned at the center of the spherical surface of the outer peripheral surface of the rotating portion 2A, and thus how the lens block 3 is rotated. Even if it makes it, the focus of the condensing lens 3A will always be located in the center of the light-receiving surface TP1 of the heat ray sensor TP.

  Moreover, in this embodiment, the scissor part 14 formed in the same structure as the scissors metal fitting 8 in the conventional example is formed integrally with the body 1.

  The decorative cover 5 is provided with four engaging claws 52 which project into engagement with the engaging holes 11d provided in the flange portion 1 so that the decorative cover 5 and the body 1 are separated from each other. Combine. Other configurations are the same as in the conventional example.

It is a principal part disassembled perspective view which shows embodiment of this invention. It is an exploded perspective view same as the above. It is a perspective view which shows a rotation holding part. It is sectional drawing which shows the principal part same as the above. It is sectional drawing which shows the principal part same as the above. It is a disassembled perspective view which shows a prior art example.

Explanation of symbols

1
3 Lens block 11a Window hole 13b Holding notch 3A Condensing lens SW switch TP Heat ray sensor

Claims (4)

  A heat ray sensor that detects a heat ray emitted from a human body, a switch that is inserted into a power supply path from a power source to a load and is turned on / off according to the output of the heat ray sensor, and a heat ray from a detection range is condensed on a light receiving portion of the heat ray sensor. A lens block having a condensing lens, a housing having a window hole for exposing the condensing lens, rotatably holding the lens block so as to change a detection range, and a housing in which a switch and a heat ray sensor are housed and fixed; An automatic switch with a heat ray sensor, wherein the lens block includes a rotating unit with a condenser lens attached thereto, a rotating holding unit that holds the rotating unit at a predetermined angle, and the rotating unit and the rotating holding unit. An automatic switch with a heat ray sensor, comprising: a lens block fixing portion that is rotatably housed inside and fixed to the housing.   2. The automatic switch with a heat ray sensor according to claim 1, wherein each of an outer peripheral surface of the rotating portion and an inner peripheral surface of the rotation holding portion has a spherical shape in surface contact with each other.   2. The automatic switch with a heat ray sensor according to claim 1, wherein a spring portion that presses the rotating portion toward the housing is formed integrally with the rotation holding portion. 4. The automatic switch with a heat ray sensor according to claim 3, wherein a projection for preventing plastic deformation of the spring portion is provided on the rotation holding portion.

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