JPH10153482A - Fixing mechanism of infrared condenser lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lens from being assembled in vertically inverted posture when assembled into a light shielding cylinder, by engaging a guide recessed part or guide projection provided on the circumference on the lens side with a projection or recessed part provided within the light shielding cylinder. SOLUTION: A guide recessed part 11, for example, is provided in the position of a flat collar part on the circumference of a lens A so that the lens A is not rotated in the front and back direction or vertically, and a linear projection 10 is provided on the inside of a light shielding cylinder 5 corresponding thereto. Since the lens A is fallen into the light shielding cylinder 5 in the state where the guide recessed part 11 is engaged with the linear projection 10, the front and back directional or vertical, rotation of the lens A is arrested. Further, since the tip of a lens nipping tool P such as pincette can be inserted to the inner part of the light shielding cylinder 5 as a recessed part 9 formed on the edge differed by 90 deg. from the guide recessed part 11 on the circumference of the lens A is nipped by the tool P, the front and back or upper and lower surfaces of the lens A are never replaced with each other while it is released from the holding state and falls within the light shielding cylinder 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for eliminating erroneous assembly when a condenser lens used in a sensor mechanism utilizing infrared rays is inserted and fixed in a light-shielding cylinder in which the lens is arranged.

[0002]

2. Description of the Related Art A conventional infrared light focusing lens fixing mechanism will be described with reference to FIGS. 15, 16 and 17. FIG. FIG.
Discloses a configuration of a conventional lens 13. In the conventional lens 13, the central arc-shaped convex portion 13a and the outer peripheral flat flange portion 13b are formed in a circular shape. Therefore, this circular lens 13 is clamped by a lens clamping tool such as tweezers, and the light-shielding cylinder 19 shown in FIGS.
When trying to insert it inside, the outer circumference of the circular lens 13
Since no space is provided between the light-shielding cylinder 19 and the lens-clamping tool, the holding state by the lens-clamping tool needs to be released at the entrance of the light-shielding cylinder 19. When the lens 13 is released from the holding state by the lens holding tool and the lens 13 is dropped into the light shielding tube 19, FIG.
As shown in FIG.
As shown in FIG. 6, a case where the robot falls in an upside down posture occurs.

[0003]

When the lens 13 falls, the center of gravity is located on the arc-shaped convex portion 13a, and friction occurs due to contact with the flat flange portion 13b or the inner periphery of the light shielding tube 19. Therefore, the portion of the flat flange portion 13b tends to be delayed, and the portion of the arc-shaped convex portion 13a falls first, so that the erroneous assembly posture in the state of FIG. 16 is likely to occur. An object of the present invention is to solve the problem that the lens is assembled upside down as shown in FIG.

[0004]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. 2. The configuration according to claim 1, wherein in the configuration in which the lens is inserted into the light-shielding cylinder of the lens holder, a guide projection or a guide recess is provided in the light-shielding cylinder, and the guide projection or the guide recess is fitted into the outer periphery on the lens side. Is provided.

According to a second aspect of the present invention, in the configuration in which the lens is inserted into the light shielding cylinder of the lens holder, a concave portion is provided at two positions on the outer periphery of the lens so that the lens holding tool can hold the lens at the time of insertion.

[0006]

Next, an embodiment of the present invention will be described. FIG. 1 is a perspective view showing a state in which a lens A of the present invention is held by a tweezer-like lens holding tool P and inserted into a light shielding tube 5, and FIG. 2 is a front view of a light shielding tube case C. 3 is a rear view of the light-shielding case C, FIG. 4 is a bottom view of the light-shielding case C, FIG. 5 is a side view of the light-shielding case C, and FIG. FIG. 7 is an enlarged rear view of a portion of the light shielding tube 4, 5, FIG. 8 is a side sectional view of a portion of the light shielding tube 5 in a light shielding tube case C, and FIG. FIG. 10 shows a lens A showing a configuration in which a guide recess 11 is provided on the lens A side.
11 is a side view and a front view of FIG. 11, and FIG. 11 is a view showing an embodiment in which a concave portion 6 is provided on the side of the light shielding cylinders 4 and 5 corresponding to the lens B shown in FIG. 12A and 12B are a side view and a front view of a lens B showing a configuration in which a lens 12 is provided.

The fixing mechanism of the infrared condenser lens shown in FIGS. 2 to 7 shows an embodiment of an infrared position detecting sensor. In the light-shielding tube case C, light-shielding tubes 4 and 5 on both the light-emitting side and the light-receiving side are formed, and a lens A having a substantially similar configuration is inserted into the light-shielding tube 4 and 5. Because In the light-shielding tube case C of the present embodiment, the axial direction of the light-shielding tubes 4 and 5 and the direction of the front surface of the light-shielding tube case C are not perpendicular to each other. However, the juxtaposed light-shielding tubes 4 and 5 are arranged in parallel directions. Infrared light emitted from light emitting diodes etc.
The light passes through the light-emitting lenses inserted into the light-shielding tubes 4 and 5, and is emitted and emitted in the direction of the measured object. Then, the infrared light irradiated and reflected on the object to be measured returns, is received by the light receiving lens, and is converted into an electronic signal by the light receiving element.

As described above, in the light-shielding tube case C, separate lenses A are inserted into the light-shielding tubes 4 and 5 as a light-receiving lens and a light-receiving lens. They have almost the same shape. The light-shielding cylinder 5 and the light-shielding cylinder 4 are slightly different in the size of a hole in a portion through which infrared light passes. The infrared passage hole of the light shielding tube 4 is larger than the infrared passage hole of the light shielding tube 5. However, the shapes of the holes of the light-shielding cylinders 4 and 5 where the lens A is inserted are configured to be substantially the same.

In the prior art, as described above, the shape of the light-shielding cylinder 19 is also circular, and the lens 13 is also configured to be circular. However, in the present invention, as shown in FIG. Visually, it has a rectangular shape with rounded corners. The light-shielding tubes 4 and 5 of the light-shielding tube case C into which the lens A is inserted are also formed in a rectangular shape with rounded corners. In this way, the possibility of turning in a plane as in the case of the circular light-shielding tube 19 and the circular lens 13 has been eliminated even by simply forming the rectangular shape with rounded corners.

The lens A has a flat flange 8 and an arc-shaped convex 7.
Is configured. The arc-shaped convex portion 7 is a portion that functions to condense infrared rays, and the planar flange portion 8 is a portion for stabilizing the position of the lens A.
In the present invention, a guide recess 11 is further provided at the position of the flat flange portion 8 on the outer periphery of the lens A so that rotation of the lens A does not occur in the front or back or in the vertical direction.
Are provided with linear projections 10 inside the corresponding light-shielding cylinders 4 and 5. In this manner, the linear projection 10 is
5 are arranged at positions opposed to each other by 180 degrees, and two guide recesses 11 are also provided at positions opposed to each other by 180 degrees on the outer periphery of the lens A. Since the lens A falls into the light-shielding tubes 4 and 5 in the state where the guide concave portion 11 and the linear protrusion 10 configured as described above are engaged, the lens A prevents the front and back or vertical rotation. It is done.

Further, the tip of the lens holding tool P such as tweezers is inserted into the outer periphery of the lens A at a position rotated by 90 degrees with respect to the portion where the guide recess 11 is provided. A concave portion 9 is opened at a position 180 degrees opposite to the flat flange portion 8 so that the tip of the holding tool P can be inserted into the light shielding cylinders 4 and 5. As described above, the tip of the lens holding tool P such as tweezers can be inserted into the light shielding tubes 4 and 5 while holding the concave portion 9 by the lens holding tool P such as tweezers. While A is released from the holding state inside the light-shielding tubes 4 and 5 and falls, the front and back surfaces or the upper and lower surfaces are not interchanged.

Next, FIGS. 11 and 12 show an embodiment in which a guide projection 12 is projected on the lens side, and a linear concave portion 6 is formed on the side of the light shielding cylinders 4 and 5. That is, when the lens B is dropped, it is only necessary to prevent the lens B from being rotated and replaced on the front and back surfaces or the upper and lower surfaces.
Guide protrusion 1 on lens B instead of guide recess 11
2 may be provided, and a linear concave portion 6 may be provided on the side of the light shielding cylinders 4 and 5 instead of the linear protrusion 10. FIG. 1 is a perspective view showing a state in which the lens A is inserted into the light shielding tube 5 of the light shielding tube case C in a state where the lens A is held by the lens holding tool P such as tweezers.

The infrared type position detecting sensor formed by using the above-mentioned fixing mechanism of the infrared condensing lens can be used as, for example, a human body position detecting sensor S. In FIG. A planar positional relationship between the wall H, the toilet U, and the human body position detection sensor S is illustrated. Usually, it is highly likely that the toilet bowl U is arranged at the center, and the human body position detection sensor S is arranged on a wall portion H such as a toilet on the side surface thereof. Then, in a state where the user is sitting on the toilet U, it is confirmed that the DUT 3 is present at the position, and a certain amount of flush water is allowed to flow 10 seconds after the user sits down. When the user leaves, operations such as flowing of washing water are automatically performed after 3 minutes.

In FIG. 14, the human body position detecting sensor S is not disposed on the wall H of a toilet or the like, but is disposed on the mechanical box Z of a normal toilet U. It is illustrated. In this case, the human body position detection sensor S may be disposed in front of the low tank W. However, when the toilet lid F of the toilet bowl U is opened, the optical path is not closed by the toilet lid F. It is necessary to arrange the human body position detection sensor S at the position.

Further, by disposing the human body position detecting sensor S on the front of the vanity, it is detected that the user has approached the vanity, and the washing water of the toilet bowl is poured in advance, It is possible to automatically turn on the lighting of the dressing table, blow out warm air to the feet in winter, open and close the doors of various parts, and turn on the foot heaters.

[0016]

As described above, the present invention has the following advantages. As in claim 1, in the configuration in which the lens is inserted into the light shielding cylinder of the lens holder,
A guide projection or a guide recess is provided in the light-shielding cylinder, and a recess or projection is provided on the outer periphery on the lens side so that the guide projection or the guide recess is fitted. Even if you release the holding state of, the lens does not rotate left and right, nor does it rotate on the front and back and upper and lower surfaces, be sure that the lens is in the normal state, on the mounting table in the light shielding cylinder, The flat flange portion is placed.

According to a second aspect of the present invention, in the configuration in which the lens is inserted into the light-shielding cylinder of the lens holder, a concave portion for holding the lens holding tool at the time of insertion is provided at two locations on the outer periphery of the lens. By inserting the tip of the holding tool into the concave portion, the lens holding tool such as tweezers does not interfere with the inner periphery of the light shielding cylinder while the lens is held, so that the lens holding tool can be used. With the lens sandwiched, it can be inserted deep into the light-shielding cylinder. As a result, the position of the lens can be reliably determined, so that the possibility of erroneous assembly is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a lens A of the present invention is held by a tweezer-shaped lens holding tool P and inserted into a light shielding tube 5. FIG.

FIG. 2 is a front view of a light shielding tube case C of the present invention.

FIG. 3 is a rear view of the light shielding cylinder case C;

FIG. 4 is a bottom view of the light shielding tube case C;

FIG. 5 is a side view of the light shielding tube case C;

FIG. 6 is a front view as seen from a direction orthogonal to the light shielding tubes 4 and 5;

FIG. 7 is an enlarged rear view of a part of the light shielding cylinders 4 and 5;

FIG. 8 is a side sectional view of a portion of the light shielding tube 5 in the light shielding tube case C;

FIG. 9 is a side sectional view of a portion of the light shielding tube 4.

FIGS. 10A and 10B are a side view and a front view of the lens A, showing a configuration in which a guide recess 11 is provided on the side of the lens A. FIGS.

FIG. 11 shows a light shielding tube 4 corresponding to the lens B shown in FIG.
-Drawing which shows the Example which provided the recessed part 6 in the 5 side.

12A and 12B are a side view and a front view of the lens B, showing a configuration in which the guide protrusion 12 is provided on the lens B side.

FIG. 13 is a plan view showing the arrangement of a wall portion such as a toilet, a toilet, and a human body position detection sensor.

FIG. 14 is a side view of a toilet bowl.

FIG. 15 is a drawing showing a state in which a lens 13 is dropped into a conventional light-shielding cylinder 19 and the lens 13 is arranged in a normal state.

FIG. 16 is a view showing a state in which a lens 13 is dropped on a conventional light-shielding cylinder 19 and the lens 13 is arranged upside down.

FIG. 17 is a front view showing a conventional lens 13;

[Explanation of symbols]

 A, B lens C light-shielding cylinder case 4, 5 light-shielding cylinder 6 linear concave portion 7 arc-shaped convex portion 8 flat flange portion 9 concave portion for lens holding tool 10 linear projection 11 guide concave portion 12 guide projection

Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04Q 9/00 371 H04Q 9/00 371Z

Claims (2)

[Claims] In a configuration in which a lens is inserted into a light-shielding cylinder of a lens holder, a guide projection or a guide recess is provided in the light-shielding cylinder, and a recess or projection into which the guide projection or the guide recess fits is provided on the outer periphery on the lens side. A fixing mechanism for the infrared condenser lens, which is provided. 2. The infrared condensing lens according to claim 1, wherein the lens is inserted into the light-shielding cylinder of the lens holder. Fixing mechanism.