Abstract: The fastening structure is fastening one member and another member via a fastening member, and includes: a fitting portion having a fitting hole; a to-be-fitted portion having a to-be-fitted hole; and the fastening member inserted into the fitting hole. The fastening member has: a trunk portion, between one end and another end of the fastening member; a tool groove at the one end; a come-off prevention portion at the other end, the come-off prevention portion having a greater radius than a radius; and a helical protrusion at a part of the trunk portion. The fitting portion has a helical groove configured to be screwed with the helical protrusion. A radius of the fitting hole is less than the radius of the come-off prevention portion, and a radius of the to-be-fitted hole is not less than the radius of the come-off prevention portion.

Abstract: According to one embodiment of a passive infrared sensor, a passive infrared sensor 1 where an infrared sensing element 5 and an optical system 4 that sets a detection area A1 of the infrared sensing element 5 are covered with a cover 2. The passive infrared sensor 1 includes: a light emitting element 6 that emits infrared light from the inside of the cover 2 to the outside through the optical system 4; a reflective region 2b that is disposed outside the cover 2 and reflects at least some of the infrared light emitted from the light emitting element 6; and a light receiving element 7 that receives the infrared light reflected by the reflective region 2b, transmitted through the optical system 4 and reaching the inside of the cover 2.

Abstract: According to one embodiment, a passive infrared sensor includes an infrared sensing element 4, a pair of lenses 5R and 5L that set mutually substantially 180° opposing side detection areas of the infrared sensing element 4, and mirrors 6R and 6L that cause infrared light from the side detection areas to enter the infrared sensing element 4. An infrared light incident surface of the passive infrared sensor is disposed facing the opposite direction from an attachment surface 30 to which the passive infrared sensor is attached at the time of installation, and the passive infrared sensor is also disposed with a lens 5C that sets plural front detection areas in the front direction. A slit 7 for allowing infrared light to be transmitted is formed in the mirrors 6R and 6L in order to allow the infrared light from the front detection areas to enter the infrared sensing element 4.

Abstract: A tamper switch body is disposed in a housing of a PIR sensor. A tamper opening is formed at a position opposite a switch actuating member of the tamper switch body in a base plate of the PIR sensor. An elastic switch member is mounted in the tamper opening. The elastic switch member includes a pressure-receiving projection portion abutting a mounting plate, and depresses the switch actuating member through elastic deformation of the pressure-receiving projection portion by receiving a pushing force from the mounting plate in a state in which the PIR sensor is fixed to a wall surface. The elastic switch member seals the inside of the housing by closing the tamper opening, thus preventing a flood into the housing of the PIR sensor.

Abstract: According to one embodiment, a passive infrared sensor 1 includes an infrared sensing element 4, a pair of lenses 5R and 5L, and main mirrors 22R and 22L. A submirror 24R is disposed on the main mirror 22R. The submirror 24R is configured so that, with respect to the main mirror 22R, the orientation of the submirror 24R is changed by a first predetermined angle in regard to the horizontal direction in a direction away from an attachment surface 30 at the installation time, and the orientation of the submirror 24R is changed by a second predetermined angle in regard to the vertical direction in a direction downward at the installation time. A submirror 23L is disposed on the main mirror 22L.

Abstract: The combined sensor of the present invention is comprised of an MW sensor and a PIR sensor, in which the frequency difference of two microwaves transmitted by the MW sensor is set such that the phase difference between the IF signals received by the MW sensor is approximately 180° when there is an object at the intermediate distance between the maximum detection distance within the target detection area and the maximum detection distance in the event of a deviation of the detection area attributable to mounting error of the infrared sensor 4.

Abstract: A tamper switch body is disposed in a housing of a PIR sensor. A tamper opening is formed at a position opposite a switch actuating member of the tamper switch body in a base plate of the PIR sensor. An elastic switch member is mounted in the tamper opening. The elastic switch member includes a pressure-receiving projection portion abutting a mounting plate, and depresses the switch actuating member through elastic deformation of the pressure-receiving projection portion by receiving a pushing force from the mounting plate in a state in which the PIR sensor is fixed to a wall surface. The elastic switch member seals the inside of the housing by closing the tamper opening, thus preventing a flood into the housing of the PIR sensor.

Abstract: According to one embodiment, a passive infrared sensor includes an infrared sensing element 4, a pair of lenses 5R and 5L that set mutually substantially 180° opposing side detection areas of the infrared sensing element 4, and mirrors 6R and 6L that cause infrared light from the side detection areas to enter the infrared sensing element 4. An infrared light incident surface of the passive infrared sensor is disposed facing the opposite direction from an attachment surface 30 to which the passive infrared sensor is attached at the time of installation, and the passive infrared sensor is also disposed with a lens 5C that sets plural front detection areas in the front direction. A slit 7 for allowing infrared light to be transmitted is formed in the mirrors 6R and 6L in order to allow the infrared light from the front detection areas to enter the infrared sensing element 4.

Abstract: According to one embodiment, a passive infrared sensor 1 includes an infrared sensing element 4, a pair of lenses 5R and 5L, and main mirrors 22R and 22L. A submirror 24R is disposed on the main mirror 22R. The submirror 24R is configured so that, with respect to the main mirror 22R, the orientation of the submirror 24R is changed by a first predetermined angle in regard to the horizontal direction in a direction away from an attachment surface 30 at the installation time, and the orientation of the submirror 24R is changed by a second predetermined angle in regard to the vertical direction in a direction downward at the installation time. A submirror 23L is disposed on the main mirror 22L.

Abstract: According to one embodiment of a passive infrared sensor, a passive infrared sensor 1 where an infrared sensing element 5 and an optical system 4 that sets a detection area A1 of the infrared sensing element 5 are covered with a cover 2. The passive infrared sensor 1 includes: a light emitting element 6 that emits infrared light from the inside of the cover 2 to the outside through the optical system 4; a reflective region 2b that is disposed outside the cover 2 and reflects at least some of the infrared light emitted from the light emitting element 6; and a light receiving element 7 that receives the infrared light reflected by the reflective region 2b, transmitted through the optical system 4 and reaching the inside of the cover 2.

Abstract: The combined sensor of the present invention is comprised of an MW sensor and a PIR sensor, in which the frequency difference of two microwaves transmitted by the MW sensor is set such that the phase difference between the IF signals received by the MW sensor is approximately 180° when there is an object at the intermediate distance between the maximum detection distance within the target detection area and the maximum detection distance in the event of a deviation of the detection area attributable to mounting error of the infrared sensor 4.