JPH08271254A - Laser beam radiation apparatus - Google Patents

Abstract

PURPOSE: To obtain an apparatus which is assembled simply and can adjust a precise and clear focus by a constitution in which a lens holding pipe is adjusted fine by tightening and loosening a focus adjusting screw installed at a cylindrical main body. CONSTITUTION: In a laser beam radiation apparatus A, the tip of a focus adjusting screw 16 which is installed at a cylindrical main body 2 is brought into contact with an adjustment taper slope 18 of a lens holding pipe 6 housed at the inside of the main body 2 in a state that its rear end part is supported by a compression coiled spring 9. When the screw 16 is tightened and loosened, the lens holding pipe 6 is moved and adjusted fine in the axial direction by utilizing the compression and the restoration of the spring 9, and it is set and fixed to a slide permission part 19 by a screw 17 for fixation in a state that a convergence position has been decided. Thereby, the laser beam radiation apparatus A in which a fine focus can be adjusted, in which a precise and clear laser projection line and a clear laser projection point can be formed, while is manufactured and assembled simply and whose projection accuracy is high can be obtained at low costs.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking operation for room layout and partitioning, a cutting operation for forming lines so that patterns and stripes are continuous when cutting fabric such as clothes. The present invention relates to a laser light emitting device used for mounting positions of hooks and the like, and other point setting work for displaying points.

[0002]

2. Description of the Related Art It is known that a laser beam is a light beam having a high energy density that travels straight without widening, but in the field of industrial application, a more precise and less diffused light beam is projected. A laser light emitting device is required.

For example, on the optical axis of the projected laser beam, a laser beam emitting device itself or a support supporting the laser beam emitting device is pivotally supported by a pivot shaft so as to swing like a weight in a vertical plane. And a rod lens is provided on the reflection optical axis or on the optical axis with its central axis being horizontal, and the light rays emitted to the vertical plane through the rod lens are emitted to the outside directly or from the light emission slits of the cover body. Based on the configuration, it has been used for a marking-out laser device used for marking-out work when laying out or partitioning a room, and recently, it has been used in Japanese Utility Model Publication No. 4-22943 or JP-A-6-297350. A laser device for marking out has been developed as described in the official gazette.

[0004]

Generally, a gas laser has been used as a laser used in a marking laser device, but recently, a laser diode is used because of its small output, small size and low cost. Has become.

When this laser diode is used, since the spread of the laser beam is larger than that of a gas laser or the like, it is projected as a thin parallel beam by a collimator lens, but it is further focused and sharpened with high accuracy. Accurate work cannot be performed efficiently without projecting points and lines.

However, the laser radiator used in the marking laser device described in Japanese Utility Model Publication No. 4-22943 has a projector that disperses a laser beam with a half mirror and three rod lenses. It has a complicated structure in which the projection line is formed on the ceiling surface, the side wall surface and the floor surface by being screwed to the lens barrel body having the focus adjustment mechanism. In addition to increasing the manufacturing cost, the focus adjusting mechanism is a general diaphragm that moves the lens barrel main body in the axial direction by the rotation of the adjusting sleeve, although the specific structure is omitted in the description and drawings. It is presumed that the adjusting means is adopted, but not only rattling occurs but also delicate adjustment is difficult.

Further, the marking-out device described in JP-A-6-297350 has a simpler structure than the former device, but since it does not have a focus adjustment mechanism, High precision is required in manufacturing and assembling parts, resulting in high cost.

The present invention provides a laser light emitting device which is easy to manufacture and assemble, is capable of fine focus adjustment, and is capable of forming an accurate and clear laser projection point or laser projection line at low cost. Has an aim.

[0009]

In the laser light emitting device according to the present invention, the outer periphery of the front end portion is formed into a tapered slope for adjustment, and the slide allowance portion in the axial direction is formed on the outer periphery of the intermediate portion, and the lens chamber is formed inside the rear end portion. And a lens holding pipe, a collimating lens housed in the lens chamber, a compression coil spring that presses the lens holding pipe from the rear end, and a laser diode disposed behind the compression coil spring. The cylindrical main body is provided with a focus adjusting screw that abuts on the adjusting taper slope of the lens holding pipe and a fixing screw that abuts on the slide permitting part. A structure for projecting a laser point (claim 1), and a structure in which the axial line of the rod lens is erected in a direction orthogonal to the laser optical axis at the tip opening of the holding hole of the cylindrical main body. A fixed structure for laser line projection (claim 2), characterized in that, as means for fixing the rod lens to the cylindrical main body, a rod lens support plate comprising a warped spring member having a light transmitting hole at the center, A means for fixing the rod lens horizontally or vertically in a state where the light passage hole is closed and screwing both ends of the rod lens support plate to the front end opening surface of the cylindrical main body (claim 3) is adopted. It is what

[0010]

In the laser light emitting apparatus according to the present invention constructed as described above, the tip of the focus adjusting screw provided on the tubular main body is housed inside the tubular main body with the rear end supported by the compression coil spring. Since the lens holding pipe is brought into contact with the adjustment taper slope, the lens holding pipe can be finely adjusted in the axial direction by tightening and loosening the focus adjusting screw, and fixed at the set position with the fixing screw. , High precision laser point can be projected clearly.

Further, as described in claim 2, by fixing the rod lens in a erected shape in the direction of the axis orthogonal to the laser optical axis at the tip opening of the holding hole of the cylindrical main body, the accuracy can be improved. A high laser line can be projected clearly, and in particular, as described in claim 3, as a fixing means for fixing the rod lens to the cylindrical main body, the rod lens is provided on the rod lens support plate made of a warped spring member. Fixed,
If both ends of this rod lens support plate can be adjusted and fixed so that the central axis of the rod lens is at right angles to the optical axis of the laser beam, it will be diffused without impairing the straightness of the laser beam, In addition, a sharp horizontal projection line or vertical projection line can be formed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an exploded sectional view of a laser light emitting device for projecting a laser line in a vertical direction according to an embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a laser line in a vertical direction. It is a schematic side view of a partially broken state when a projecting laser light emitting device is used for a marking laser device.

The laser light emitting device A incorporated in the marking laser device according to the embodiment of the present invention shown in FIGS. 1 and 2 has a cylindrical main body 2 integrally formed with a fixing flange 1 at one end, and a rod lens. 3, a rod lens support plate 4 made of a spring member for bonding and fixing 3, a base 5 fixed to the fixing flange 1 holding and fixing the support plate 4, and a lens holding pipe 6 inserted and held in the cylindrical main body 2. A collimating lens 7 held by the lens holding pipe 6, a laser diode 8 mounted on the other end of the cylindrical main body 2, and a compression coil spring 9 interposed between the laser diode 8 and the collimating lens 7. It consists of

The cylindrical main body 2 has a pair of female screw holes 10 formed in the fixing flange 1, and a holding hole 11 for holding the lens holding pipe 6 and the compression coil spring 9 in the axial direction from one end side and the other end. A female screw hole 12 for screwing the laser diode 8 from the side is formed so as to penetrate through by forming a spring support step 13 in the middle portion, and female screw holes 14 for mounting are formed on both sides in the radial direction of the body part. 15 is formed, and a focus adjusting screw 16 and a fixing screw 17 are provided in a row in the axial direction of the cylindrical main body 2 on the upper portion in the radial direction of the body portion, and the tip end thereof is exposed in the holding hole 11. Has become.

An adjusting taper slope 18 is formed on the outer peripheral portion of the front end of the lens holding pipe 6, a slide permitting portion 19 is formed on the intermediate barrel portion, and a lens chamber 20 is formed inside the rear end portion.

Then, the lens holding pipe 6 holding the compression coil spring 9 and the collimating lens 7 is sequentially accommodated in the holding hole 11 of the cylindrical main body 2 from the fixing flange 1 side, and the lens holding pipe 6 has a tip end portion. When the compression coil spring 9 is compressed, the formed adjustment taper slope 18 is
A laser diode 8 is screwed and assembled at the rear end of the holding hole 11 while being pressed by the tip of the focus adjusting screw 16, and the laser light from the laser diode 8 is focused by the collimator lens 7 and converges at the rod lens 3. As described above, by loosening the focus adjusting screw 16, the lens holding pipe 5 is slightly moved in the axial direction, and the fixing screw 17 sets and fixes the lens holding pipe 5 in the slide permitting portion 19 in a state where the convergent position is determined.

The rod lens support plate 4 is composed of a warped spring member having a light passage hole 21 in the central horizontal direction, so as not to obstruct the passage of light rays through the rod lens 3 when the light passage hole 21 is closed. The rod lens support plate 4 is bonded and fixed to the base 5 so that the horizontal center axis of the rod lens 3 is at right angles to the optical axis of the laser beam.
Then, the base 5 is fixed to the female screw hole 12 of the fixing flange 1 provided on the front end opening surface of the cylindrical main body 4.

The rod lens support plate 4 is fixed to the base 5 by first fixing one end firmly and then tightening the other end, which is floating from the surface of the base 5 by warping, against the spring force. However, in the tightening process, the central axis of the rod lens 3 is adjusted and fixed at right angles to the optical axis of the laser beam.

The laser light emitting device A constructed as described above is used by being incorporated in a marking laser device as shown in FIG. 3, for example.

The structure is such that a support body 24 pivotally supported by a pivot shaft is swingably pivoted like a weight in a vertical plane in the central portion of a horizontal frame 23 supported by a column standing upright on a base 22. A mounting surface 1 formed on both sides of the cylindrical main body 2 in the body radial direction so that the optical axis of the laser light projected from the laser light emitting device coincides with the central vertical line of the support 24 at the upper end from the pivot position.
5 is a structure assembled by screw-fixing using the female screw hole 14 for mounting of the laser beam emitted from the laser light emitting device emitted through the rod lens 3 in parallel with the vertical plane. It is used to form a laser projection line on the floor surface, wall surface, and ceiling surface in the room by radiating from the slit 26 for outside.

In the embodiment, the laser light emitting device having a structure for projecting a laser line in which the rod lens 3 is fixed in an erected state at the tip opening of the holding hole 11 of the cylindrical main body 2 has been described. When not provided, it can be a laser light emitting device having a structure for projecting a laser point, and can be effectively used in a work field in which a laser point needs to be set.

Further, when used in a laser device for marking out, a support member 24 swingably supported on a vertical plane.
Although the laser light emitting device A is fixed to the upper end of the pivotal position, it may be fixed below the pivotal position, and it can also be used as a laser light emitting device that forms a laser projection line in the horizontal direction. It goes without saying that you can do it.

In FIG. 3, reference numeral 27 is a switch, 28 is a battery power source, and 29 is a braking unit utilizing magnetic lines of force.

[0024]

According to the laser light emitting device of the present invention having the above-described structure, the inside of the cylindrical main body is structured such that the tip of the focus adjusting screw provided on the cylindrical main body is supported by the compression coil spring at the rear end. Since it is brought into contact with the adjustment taper slope of the lens holding pipe housed in, the compression and restoration of the compression coil spring is utilized by tightening and tightening this focus adjustment screw,
It is possible to finely adjust the lens holding pipe in the axial direction, and to adjust the focus delicately to form a precise and clear laser projection line and laser projection point. Also, it is easy to manufacture and assemble, and the projection accuracy It is possible to provide a laser light emitting device with high cost at low cost.

According to a third aspect of the present invention, the rod lens is horizontally or vertically placed on the rod lens support plate which is formed of a spring member having a warp formed in the center thereof and the light passage hole is closed. When fixing both ends of this rod lens support plate to the open end surface of the cylindrical main body with screws,
Since the central axis of the rod lens can be adjusted and fixed at right angles to the optical axis of the laser beam,
It is possible to diffuse the laser beam without impairing the straightness of the laser beam and to form a highly precise and accurate horizontal projection line or vertical projection line.

[Brief description of drawings]

FIG. 1 is an exploded cross-sectional view of a laser light emitting device that projects a laser line in a vertical direction according to an embodiment of the present invention.

FIG. 2 is a front view of a laser light emitting device according to an embodiment of the present invention.

FIG. 3 is a schematic side view of a partially broken state when the laser light emitting device of the present invention is used in a marking laser device that projects a laser line in a vertical direction.

[Explanation of symbols]

 A laser light emitting device 1 fixing flange 2 cylindrical main body 3 rod lens 4 rod lens support plate 5 base 6 lens holding pipe 7 collimating lens 8 laser diode 9 compression coil spring 10 female screw hole 11 holding hole 12 female screw hole 13 for spring Support stage 14 Female thread hole for mounting 15 Mounting surface 16 Focus adjustment screw 17 Fixing screw 18 Adjusting taper slope 19 Sliding allowance part 20 Lens chamber 21 Light passing hole 22 Base 23 Horizontal frame 24 Support 25 Cover body 26 For light emission Slit 27 Switch 28 Battery power 29 Braking unit

Claims (3)

[Claims] 1. A lens holding pipe having an outer periphery of a tip portion as an adjusting taper slope and an axial slide allowance portion on an outer periphery of an intermediate portion and a lens chamber inside a rear end portion, and a lens holding pipe housed in the lens chamber. A collimating lens, and a compression coil spring that presses the lens holding pipe from the rear end,
A laser diode arranged at the rear of the compression coil spring is mounted in a holding hole penetrating the cylindrical main body, and the cylindrical main body is brought into contact with a tapered tapered surface for adjustment of the lens holding pipe. A laser light emitting device for laser-point projection, comprising an adjusting screw and a fixing screw that comes into contact with the slide allowance portion. 2. The laser light emitting device according to claim 1, wherein a rod lens is fixed to the opening of the distal end of the cylindrical holding hole so as to extend in a direction orthogonal to the laser optical axis for laser line projection. . 3. A rod lens supporting plate made of a spring member formed with a warp having a light passage hole at its center, wherein the rod lens is fixed to the tubular main body, and the rod lens is closed with the light passage hole closed. The laser light emitting device according to claim 2, wherein the laser light emitting device is fixed horizontally or vertically, and both ends of the rod lens support plate are fixed by screws to the front end opening surface of the cylindrical main body.