JP2000055661A - Variable ring beam forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a variable ring beam forming device of a small-size having a good usability in which a work based on an image becomes outstandingly easier and a size of a ring image can be simply varied by only adjusting an inclination angle of a scanning mirror by projecting a laser beam irradiated in a straight direction to a ceiling surface, etc., at a ring-like shape by the after image phenomenon of an eye. SOLUTION: A variable ring beam forming device is provided with a scanning mirror 8 reflecting a laser light L1 irradiated from a laser module 2 provided at a front position in an irradiation direction such that an inclination angle can be freely adjusted and it is rotated by a motor 10 making the irradiation direction from the laser module 2 as a center. The device is also provided with a mirror coating surface 11 further reflecting a reflection light L2 of the laser light by the scanning mirror 8 around the scanning mirror laterally provided at a constant gap such that a diameter becomes larger from the lower portion to the upper portion so as to be a slant surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reflects a laser beam from a scanning mirror rotating around an incident direction as a light while reflecting the laser beam toward a mirror-coated surface having a slanted surface at a high speed on the seabed. The present invention relates to a variable ring beam forming apparatus capable of transferring a laser reflected light into a ring shape due to an afterimage phenomenon of an eye, for example, to a ceiling surface or a wall surface.

[0002]

2. Description of the Related Art For example, during construction work,
Conventionally, when fluorescent lamps are installed at several places on a circumferential line having a predetermined radius from a point, or when a hole having a predetermined radius is formed from one point on the ceiling surface for mounting a chandelier, an operator has conventionally climbed a stepladder. To fix the pin at one point on the ceiling,
A pencil attached to one end of a thread of a predetermined radius tied to the pin was moved while stretching the thread to draw a scribe line of a desired size on the ceiling.

[0003]

However, it is difficult for an operator to climb a stepladder and perform such a task when the posture is upward and painful, and when the large scribing line is drawn, the stepladder is moved many times. There were many inconveniences such as necessity.

[0004] The present inventor has studied how to solve such a problem and has made various efforts. And the conclusion is that if the principle of a laser marking device using a laser beam that is conventionally known is applied, a ring-shaped laser beam can be freely formed from the floor surface, and furthermore, Further studies have been made on how a linear or dot laser beam can be made into a ring shape with a variable size.

[0005] As a result, the laser light emitted from the laser module is reflected by the scanning mirror on the mirror coating surface on the lateral side at a rotation speed of a certain speed or more, and further reflected from the mirror coating surface, so that the laser light is emitted in a linear direction. Laser light is generated by the afterimage phenomenon of the eyes.
This makes it possible to project a ring-shaped image on the ceiling surface, etc., making it extremely easy to work, and it is easy to adjust the tilt angle of the scanning mirror to easily create a ring-shaped image. It is an object of the present invention to provide a small and easy-to-use variable ring beam forming apparatus whose size can be changed.

[0006]

SUMMARY OF THE INVENTION A variable ring beam forming apparatus according to a first configuration of the present invention proposed to achieve the above object is provided in a forward direction of a laser beam irradiated from a laser module. The scanning mirror that reflects the laser light is provided so that the tilt angle can be adjusted freely and the motor is rotated by the motor around the irradiation direction from the laser module. Light L2
The scanning mirror is further provided with a mirror-coated surface that is provided around the scanning mirror at a constant interval in the horizontal direction, and has a slope having a large diameter from the bottom to the top. .

[0007] This feature will be easily understood from an operational aspect. The laser beam (beam) applied to the inclined scanning mirror is reflected from the scanning mirror further toward the surrounding mirror coat surface. However, because this scanning mirror is rotating at a certain speed or more toward the mirror coat surface, a ring-shaped laser beam (beam) enters the mirror coat surface due to the afterimage of the eyes. Becomes For this reason, the laser light (beam) reflected from the mirror coat surface having a slanted periphery is also formed in a ring shape, and this is reflected on an image-receiving surface such as a ceiling surface.

Since the tilt angle of the scanning mirror is adjustable, changing the tilt angle changes the angle at which light enters the mirror coat surface, and is reflected from the mirror coat surface to reflect light from the ceiling surface or the like. The size of the ring-shaped image projected on the screen also changes.

Therefore, the laser beam (beam) can be easily formed by placing the apparatus on the floor just below the ceiling requiring scribing and adjusting the inclination angle of the scanning mirror so that a desired size can be drawn. It is possible to project the scribe line from the video. Moreover, this laser light (beam)
Does not contaminate the ceiling surface, and can project a scribe line based on an accurate laser light (beam) image even on an uneven ceiling surface.

[0010] When such a laser beam (beam) is formed on the ceiling surface, a scribe line having a desired radius may be required around a predetermined point on the ceiling surface.
For this reason, the second configuration of the present invention is characterized in that the inclination angle of the scanning mirror includes a direction that does not reflect the laser light emitted from the laser module. In other words, in the first stage of use of this device, first, the scanning mirror is set up without tilting, the laser light emitted from the laser module is projected on the ceiling as it is, and this projected laser light is focused on one point on the predetermined ceiling surface. What is necessary is just to set the position of the present apparatus so that it is positioned, and then tilt the scanning mirror to a desired angle.

In the above description, when the laser light is projected on the ceiling surface as it is, whether or not the laser light is directed vertically upward is a problem. For this purpose, the apparatus is provided with several height adjusting legs, The posture of the present device may be adjusted by adjusting any of the height adjusting legs.

If a more accurate vertical posture is required, the apparatus is supported by a gyro held on a case so as to be swingable so that the entire apparatus is oriented in the vertical direction by its own weight. What is necessary is just to make a structure.

By the way, in the above-described configuration, the scanning mirror is used to reflect the laser light irradiated from the laser module toward the mirror coat surface, but a prism may be used instead.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The objects and constitutions of the present invention have been described above, and the specific constitution of the variable ring beam forming apparatus according to the present invention will be described below based on the embodiments shown in the accompanying drawings. I do.

FIG. 1 is a front view showing a variable ring beam forming apparatus according to a first embodiment of the present invention, and FIG.
FIG. 2 is a front sectional view showing the scanning mirror in a different rotation direction.

The configuration of the variable ring beam forming apparatus 1 according to the first embodiment of the present invention will be described with reference to these drawings. The laser module 2 accommodated in a cylindrical case 4 has a laser beam (beam). A laser diode 3 for irradiating L1 is provided, and a lower end of a cylindrical pulley support cylinder 6 is provided on a bare link 5 held at a front end in the case 4 in front of an opening 2a of the laser module 2. A belt pulley 7 is inserted and fixed near the tip of the sprocket support cylinder 6, which is held outside the case 4 and protrudes out of the case 4. Belt pulley 1
The belt 9 is hung between the five and this motor 10
Drives the belt pulley 7 and the pulley support cylinder 6
Is designed to rotate.

At the tip of the sprocket support cylinder 6, mirror holding portions 16a, 16a are formed by bending both side ends of a ring-shaped base upward to form mirror holding portions 16a.
Is mounted on the mirror holding portions 16a, 16a.
Both ends of the center of the scanning mirror 8 that reflects the light are supported so as to be vertically rotatable. Therefore, the mirror holding pedestal 16 and the scanning mirror 8 rotate together with the pulley support cylinder 6.

The laser beam L2 reflected by the scanning mirror 8 is arranged in the lateral circumferential direction of the scanning mirror 8.
Is further provided on the support base 12 in the form of a slope having a larger diameter from the lower part to the upper part. Note that this support 12 is a rubber ring 1 for holding.
3 and supported by the case 14.

For this reason, the rotating scanning mirror 8
The laser light L2 reflected from the mirror is irradiated toward the mirror coat surface 11 therearound, and is further reflected by the mirror coat surface 11. However, since the scanning mirror 8 is rotating at a relatively high speed, the scanning is performed. The laser light reflected from the mirror 8 toward the mirror coat surface 11 appears to be continuous in the rotating direction due to the afterimage phenomenon of the eyes, that is, projected around the mirror coat surface 11. For this reason, mirror coat surface 1
The laser beam L3 reflected at 1 also looks like a cylinder, and the image L4 due to the laser beam projected on the ceiling surface looks like a ring. The direction of reflection by the scanning mirror 8 is basically a horizontal direction, and the mirror coating surface 11
Is basically upward. Note that these directions refer to the case where the direction of the laser light irradiated by the laser module 2 is viewed upward.

Next, an example of a structure for adjusting the support and the tilt angle of the scanning mirror 8 will be described with reference to FIGS. 3 and 4. The mirror holding portions 16a, 16a
One end of a mounting member 19 also serving as a chrysanthemum seat is fixed to the opposing surface at the upper end of the scanning mirror 8, and the other end of the mounting member 19 is mounted on both ends of the center of the scanning mirror 8, respectively. The support pins 17, 17 are supported from one end of each mounting member 19 on the side supported by the scanning mirror 8, and the other end facing the mirror and the mirror holding portions 16a, 16a are inserted therethrough. 8 is supported by the mirror holding portions 16a, 16a,
Moreover, each of the support pins 17, 17 and the mirror holding portions 16a, 1
6a having a biasing force in the direction of extension between the springs 18 and 18a.
Are supported, and the scanning mirror 8 is supported by applying a pulling force in a direction in which the chrysanthemum seats of the mounting members 19 are engaged with each other, so that the rotational force of the motor (10) described above is applied. However, the scanning mirror 8 does not inadvertently change its inclination angle, and when changing the inclination angle of the scanning mirror 8 as shown in FIG. 4, the heads of the support pins 17, 17 are pinched with a fingertip. By rotating the scanning mirror 8 or moving the end of the scanning mirror 8 to a certain extent with a fingertip, the position where the chrysanthemum is engaged may be changed.

When a laser beam (beam) is formed on the ceiling surface, a scribe line having a desired radius may be required around a predetermined point on the ceiling surface in some cases. If the device is not placed directly below this point, the ring-shaped laser light (beam) projected on the ceiling surface is projected with some distortion.

FIGS. 5 and 6 deal with such a case. As shown in these figures, the scanning mirror 8 can be supported at both ends of its lower end. Then, the mirror holding portions 16Aa, 16Aa are protruded from the biased portion of the base 16A, and the support pins 17, 17, the springs 18, 18,
Mounting members 19 having a chrysanthemum seat surface are provided, and the scanning mirror 8 is provided between the mirror holding portions 16Aa, 16Aa.
Is provided.

Therefore, when the scanning mirror 8 is tilted so as to avoid the laser light L1 emitted from the laser module (2), that is, when the scanning mirror 8 is set up, this laser light L1 is directly reflected by the laser light L5 directly above. It is projected on the ceiling as dots. Therefore, when the present apparatus is moved so that the dot-shaped laser light coincides with one point on the ceiling surface, an accurate ring-shaped, that is, a ring-shaped image having a uniform radius is projected on the ceiling surface.

For example, when enjoying an image by laser light, the apparatus may be tilted to project a distorted ring-shaped image. Further, the present device may be structured so that it can be used while being tilted in the lateral direction. It is desirable that the drive source of the motor (10) is a battery.

[0025]

According to the variable ring beam forming apparatus according to the present invention described above, the laser beam emitted from the laser module is reflected by the scanning mirror at a rotational speed of at least a predetermined value on the mirror coat surface, and further, the mirror coat surface By reflecting from the laser light emitted in the linear direction, the afterimage phenomenon of the eyes can be projected in a ring shape on the ceiling surface or the like, and by doing so, for example, during the construction work, the ceiling surface When opening a large hole on a surface at a high position such as, or installing a fluorescent lamp at a predetermined location in the circumferential direction of the ceiling surface, the scribe line before performing this work does not rise near the ceiling, Simply placing the device in place on the floor was easy. Moreover, the size of the image of the ring can be easily changed only by changing the inclination angle of the scanning mirror.

In adjusting the tilt angle of the scanning mirror, the tilt angle of the scanning mirror includes a direction that does not reflect the laser beam emitted from the laser module, so that the laser beam emitted from the laser module is reflected. Can be projected on the ceiling as it is without reflection. By doing so, a ring-shaped image having an accurate radius from a predetermined center position on the ceiling surface can be projected.

[Brief description of the drawings]

FIG. 1 is a front view showing a variable ring beam forming apparatus according to a first embodiment of the present invention.

FIG. 2 is a front sectional view showing the scanning mirror in a different rotation direction.

FIG. 3 is a front cross-sectional view showing an example of a structure for supporting a scanning mirror and adjusting a tilt angle.

FIG. 4 is a side sectional view of the same.

FIG. 5 is a front sectional view showing an example of a structure for adjusting a supporting angle and a tilt angle of a scanning mirror according to another embodiment.

FIG. 6 is a side sectional view of the same.

[Explanation of symbols]

 L1 to L5 Laser light (beam) 1 Variable ring beam forming device 2 Laser module 8 Scanning mirror 11 Mirror coated surface 16a Mirror holding unit

Claims (2)

[Claims] 1. A scanning mirror for reflecting a laser beam is provided in front of an irradiation direction of a laser beam emitted from a laser module with an adjustable tilt angle and a motor centering on the irradiation direction from the laser module. The mirror coating surface, which is provided so as to rotate and further reflects the reflected light L2 of the laser light by the scanning mirror, is provided around the scanning mirror at a predetermined horizontal interval, and from the bottom to the top. A variable ring beam forming apparatus, which is provided so as to have an inclined surface having a large diameter. 2. The variable ring beam forming apparatus according to claim 1, wherein the inclination angle of the scanning mirror includes a direction in which the laser light emitted from the laser module is not reflected.