JPH0448507Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a structure for adjusting the mounting angle of a device such as a heat ray sensor that is attached to a construction surface.

[Background Art] For heat ray detectors and the like that are attached to construction surfaces, it is necessary to adjust the mounting angle so that the detection area can be changed.

A conventional mounting angle adjustment method will be explained using a heat ray sensor as an example. The first method, as shown in FIG. 4, is a fixing part 8 attached to the construction surface 7, which is pivoted to the fixing part 8 by a hinge 9 and attached to the back of the base 2 of the heat ray sensor A. A mounting base 11 comprising a movable part 10 is used. The movable part 10 of this mounting base 11 is formed with a hanging piece 13 that is vertically installed on the construction surface 7 side and has a long hole 12 bored therein, and slides inside the long hole 12 with appropriate frictional resistance. One end of the connecting rod 14 is slidably attached,
The other end of this connecting rod 14 is fixed to the fixed part 8. The operation of this mounting angle adjustment mechanism is as follows. First, the movable part 10 to which the heat ray sensor A is attached
Rotate the side by rotating the hinge 2.
At this time, if the connecting rod 14 slides in the elongated hole 12 and the rotational force is released with the heat ray sensor A facing the appropriate detection direction, the mounting angle of the heat ray sensor A is adjusted to the predetermined detection direction. be able to. In addition, the long hole 12
The connecting rod 14 sliding inside tries to return to its original state, but since it has a moderate amount of frictional resistance, the adjusted mounting angle will not change. Further, a band-shaped string 15 led out from the heat ray sensor A in the figure is a lead wire that transmits the output of the heat ray sensor A to a parent device such as a housing information board. However, in this method, a mounting base 1 is required separately from the heat ray sensor A, and there is a problem in that when a strong impact is applied to the heat ray sensor A after adjusting the angle, the detection direction easily shifts.

The second mounting angle adjustment method is as shown in FIG. This is a method of changing the relative position of In this conventional example, a base 1 houses a printed circuit board 17 on which a hot wire element 16 is mounted.
8, and a cover 30 which is attached to the opening of the base 18 and has a Fresnel lens 6 attached to the front surface thereof to focus the heat rays on the heat ray element 16. A screw 21 is provided inside the back of the central portion of the base 18 for inserting a screw hole drilled in the printed circuit board 17 and screwing the printed circuit board 17 to the base 18.
A boss 20 for the printed circuit board 17 is bored.
The screw hole 19 drilled in is a blank hole so that the printed circuit board 17 can be shifted vertically and horizontally. Therefore, as shown in FIG. 6, by shifting the printed circuit board 17 and screwing it to the base 18, the Fresnel lens 6 with the cover 30 attached and the hot wire element 1
For example, the relative position with respect to the hot wire element 1 can be varied.
By varying the position of 6 vertically and horizontally, the detection area can be varied from the direction of the solid line to the direction of the broken line.
However, in this case, if the relative position between the hot ray element 16 and the Fresnel lens 6 is significantly shifted, the detection sensitivity will be extremely reduced and detection will become impossible, so the variable range will be narrower and moreover, accurate detection in any direction will be possible. There was a problem where it was difficult to set the direction. Further, in order to prevent the sensitivity from decreasing, there is a problem in that a means for varying the angle of the Fresnel lens 6 is required to shift the focal position of the Fresnel lens 6.

The third method is to provide the optical system with a function of varying the position where light is focused. As shown in FIG. 7, a mirror 22 whose top and front surfaces are open and which focuses light forward is used as an optical system, and a hot ray element 16 is disposed in front of this mirror 22. An angle adjustment mechanism 24 is attached to the outer surface of the mirror 22 and pivoted to the base 23 so as to rotate in the up/down direction and in the circumferential direction. And mirror 22
A printed circuit board 25 on which circuit components are mounted is mounted on a base 23 at the periphery of the base 23. In this case, the structure of the mechanism for changing the focusing position of the heat rays by the mirror 22 becomes complicated, resulting in problems of increased cost and time-consuming adjustment. Particularly in the case of simple (small) heat ray sensor A and other instruments, the structure of the conventional mounting angle adjustment method described above is too complicated, and a simpler mounting angle adjustment structure has been desired.

[Purpose of the invention] The present invention has been made in view of the above-mentioned points, and its purpose is to provide a mounting angle adjustment structure that allows easy adjustment and has a simple structure. .

[Disclosure of the invention] (Example) Fig. 1 is a diagram showing an example of the invention, which is a heat ray sensor A using a Fresnel lens 6 as an optical system, with the Fresnel lens 6 attached to the front surface. A body 1 in which a box-shaped lens mounting portion 1a is formed.
and a box-shaped base 2 with an open front.The lower side of the back of the body 1 and the opening edge of the base 2 are connected. It has a hinge function that allows it to rotate freely so that the opening can be changed.

Each part will be explained below. First, the body 1 to which the Fresnel lens 6 is attached will be explained.
The front surface of the body 1 has an opening where a Fresnel lens 6 for concentrating heat rays on the heat ray element 16 is attached.
A protrusion 27 is provided in which the upper and lower edges of the front opening protrude in a semicircular shape, and the curved surface shape of the protrusion 27 matches the curved surface of the Fresnel lens 6. This body 1
A recess 3 is provided on the top surface of the lens mounting portion 1a, and a plurality of long holes 4 are provided in the bottom surface of the recess 3 in the front-rear direction. A hole is drilled through the upper surface of the mounting portion 1a. An insertion hole 28 is formed in the main body portion 1b, which is an extension of the bottom surface of the recess 3. Note that a printed circuit board 17 is housed in the body 1 at a heat ray condensing position of the Fresnel lens 6 so that a heat ray element 16 (not shown) is located therein.

Next, base 2 will be explained. The side surface of the base 2 is a tapered surface inclined at 45 degrees, so that a heat ray sensor A can be attached to a corner portion of the construction surface 7.

The leaf spring 5 has an L-shaped cross section, and the horizontal piece 5a is bent upward and the hook hole 5 is bent upward.
A bent piece 51 with a hole 2 is provided, and a claw 53 is formed by cutting and raising the slightly inner side of the bent piece 51 downward. Furthermore, two attachment holes 54 are bored in the vertical piece 5b. Incidentally, depending on the size of the claw 53, the elongated hole 4 bored in the recess 3 of the body described above may be used as a groove.

The attachment of the heat ray sensor A to the construction surface 7 will be described below. First, the body 1 is rotated so as to be separated from the base 2, and the base 2 is screwed onto the construction surface 7. At this time, the base 2 is mounted so as to be sandwiched between the leaf spring 5 and the construction surface 7 by inserting the screw 29 into the mounting hole 54 of the leaf spring 5 and screwing it together. Then, the horizontal piece 5a of the leaf spring 5 is inserted into the insertion hole 28 of the body 1, and the claw 53 of the leaf spring 5 is fitted into one of the elongated holes 4. In this state, the connecting portion 26 that connects the body 1 and the base 2 opens, allowing the body 1 to be directed in an appropriate detection direction. Here, if it is necessary to change the detection area with the heat ray sensor A attached, insert the tip of the driver 8 etc. into the hook hole 5 of the bending piece 51.
The detection direction is changed by pulling the horizontal piece 5a of the leaf spring 5 upward, removing the claw 53 from the long hole 4, and fitting the removed claw 53 into the appropriate long hole 4. It is something that can be done.

[Effects of the invention] As described above, the present invention includes a body in which components such as a circuit that requires a change in the detection direction of a heat ray sensor or the like is housed, and a plurality of grooves are bored in the front and rear sides of the body, and the body. a base which is hingedly connected to the back surface of the body and attached to the construction surface; one end is fixed to the base and a claw is formed at the other end, and the claw is fitted into a groove in the body to open an opening between the base and the body; Since it is equipped with a leaf spring that fixes the angle, and the body and base are connected by a hinge, the detection direction of the heat ray detector etc. can be changed arbitrarily by changing the opening angle between the body and the base. By fitting the pawl of a leaf spring, one end of which is fixed to the base, into an appropriate groove on the body, the opening angle between the body and the base can be fixed, and when the detection direction needs to be changed, the groove in which the pawl fits can be changed. By doing so, the mounting angle can be easily adjusted, and since the only member required to adjust the mounting angle of the body is the leaf spring, the structure can be simplified.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of the present invention;
Fig. 2 is a sectional view showing the installation state of the same as above, Fig. 3 is a perspective view showing the main parts of the above, Fig. 4 is an explanatory view showing a conventional example, and Fig. 5 is an exploded perspective view showing another conventional example. ,
FIG. 6 is an explanatory diagram of the same operation as above, and FIG. 7 is a perspective view showing still another conventional example. A is the heat ray sensor, 1 is the body, 2 is the base, 4
5 is a long hole, 5 is a leaf spring, and 7 is a construction surface.

Claims (1)

[Scope of utility model registration request] A body that houses parts such as circuits that require a change in the detection direction of a heat ray detector, etc., and has a plurality of grooves cut in the front and back directions on the side, and a base that is hinged to the back of the body and attached to the construction surface. and a plate spring having one end fixed to the base and having a pawl formed at the other end and fitting the pawl into a groove of the body to fix the opening angle between the base and the body. structure.