JP2900131B2 - Laser light emitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackout operation for laying out or partitioning a room, a cutting operation for forming lines so that patterns and stripes are continuous when cutting clothes such as clothes, or the like. The present invention relates to a laser light emitting device used for a point setting operation for displaying a hook mounting position and other points.

[0002]

2. Description of the Related Art It is known that a laser beam is a beam having a high energy density which travels straight without being spread very much. However, in the above-mentioned industrial application field, a more precise and less spread light beam is projected. There is a need for a laser light emitting device.

[0003] For example, the laser beam emitting device itself or a support supporting the laser beam emitting device is pivotally supported by a pivot shaft so as to be swingable in a plumb bob in a vertical plane, and is supported on the optical axis of the projected laser beam. A rod lens is provided on the reflection optical axis or on the optical axis with its central axis horizontal, and the light beam radiated to the vertical plane through the rod lens is radiated directly or from the light radiation slit of the cover body to the outside. Based on the configuration, it is used for a blackout laser device used for blackout work when performing room layout, partitioning, and the like. A laser device for ink marking described in a gazette or the like has been developed.

[0004]

Generally, gas lasers have been used as lasers for use in blackout laser devices. Recently, however, laser diodes have been used because of their small output, small size and low cost. Has become.

In the case of using this laser diode, since the spread of the laser beam is larger than that of a gas laser or the like, the laser beam is projected as a thin parallel beam by a collimating lens. Without accurate points and lines, accurate work cannot be performed efficiently.

However, the laser radiator used in the blackout laser device described in Japanese Utility Model Publication No. 4-22943 has a light projecting body in which a laser beam is dispersed by a half mirror and three rod lenses. , Which is screwed onto the lens barrel body with a focus adjustment mechanism to form projection lines on the ceiling surface, side wall surface and floor surface.This increases the number of parts, the complexity of assembly and the demand for skill. In addition to increasing the manufacturing cost, the focus adjusting mechanism is a general diaphragm that moves the lens barrel body in the axial direction by rotating the adjusting sleeve, although the specific configuration is omitted in the description and drawings. It is presumed that the adjusting means is employed, but not only rattling occurs but also fine adjustment is difficult.

[0007] The blackout device described in JP-A-6-297350 has a simpler structure than the former device, but does not include a focus adjustment mechanism. High precision is required in the production and assembly of parts, resulting in high costs.

An object of the present invention is to provide an inexpensive laser light emitting device which is easy to manufacture and assemble, can perform fine focus adjustment, and can form an accurate and clear laser projection point or laser projection line. The purpose is.

[0009]

According to the laser light emitting device of the present invention, the outer periphery of the front end portion is formed into a tapered slope for adjustment, and an axial slide allowance portion is formed on the outer periphery of the middle portion, and a lens chamber is formed inside the rear end portion. A lens holding pipe, a collimating lens housed in the lens chamber, a compression coil spring that presses the lens holding pipe from a rear end, and a laser diode disposed behind the compression coil spring. The lens is provided in a holding hole penetrated through the cylindrical body, and a focus adjusting screw abutting on an adjusting tapered slope of the lens holding pipe and a fixing screw abutting on a sliding allowance are provided on the cylindrical main body. Laser point characterized by
And a laser line projecting structure in which the axis of the rod lens is fixed to the opening at the tip end of the cylindrical main holding hole in a direction perpendicular to the laser optical axis. 2) wherein the rod lens is fixed to the cylindrical main body of the rod lens by a rod lens support plate formed of a warped spring member having a light transmission hole in the center and in which the light transmission hole is closed. Is fixed horizontally or vertically,
The present invention is characterized in that means (claim 3) for fixing both ends of the rod lens support plate with screws to the distal end opening surface of the cylindrical main body is adopted.

[0010]

In the laser light emitting device according to the present invention, the front end of the focus adjusting screw provided on the cylindrical main body is housed inside the cylindrical main body with the rear end supported by a compression coil spring. Since the lens holding pipe is in contact with the tapered slope for adjustment of the lens holding pipe, the lens holding pipe can be finely adjusted in the axial direction by loosening the focus adjustment screw, and can be fixed at the set position with the fixing screw. , And can accurately project a laser point with high accuracy.

According to a second aspect of the present invention, the rod lens is fixed to the opening at the tip end of the holding hole mainly formed in a cylindrical shape so as to extend in the direction perpendicular to the laser optical axis. A high laser line can be clearly projected, and in particular, as described in claim 3, as a means for fixing the rod lens to the cylindrical main body, the rod lens is provided on a rod lens support plate made of a warped spring member. And fix
Both ends of the rod lens supporting plate, if the central axis of the rod lens with respect to the optical axis of the laser beam is configured it adjust fixed so that a right angle, is diffused without prejudice to straightness of the laser beam, accurate and clear A simple horizontal projection line or a vertical projection line can be formed.

[0012]

FIG. 1 is an exploded sectional view showing a laser beam emitting apparatus 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. FIG. 4 is a schematic side view of a partially broken state when a laser light emitting device to be projected is used as a marking laser device.

A laser light emitting device A to be incorporated in the blackout 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. A rod lens support plate 4 made of a spring member for bonding and fixing the support plate 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, a compression coil spring 9 interposed between the laser diode 8 and the collimating lens 7, It is composed of

The cylindrical main body 2 has a pair of female screw holes 10 formed in the fixing flange 1, 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 into which the laser diode 8 is screwed from the side is formed through a spring supporting step 13 in the middle part, and a mounting female screw hole 14 is engraved on both sides in the body radial direction. 15, a focus adjusting screw 16 and a fixing screw 17 are arranged in the axial direction of the cylindrical main body 2 at the upper part in the body radial direction, and the tip thereof projects into the holding hole 11. Has become.

An adjusting tapered slope 18 is formed on the outer periphery of the front end of the lens holding pipe 6, a slide allowance 19 is formed on the intermediate body, and a lens chamber 20 is formed inside the rear end.

A compression coil spring 9 and a lens holding pipe 6 holding a collimating lens 7 are sequentially housed in a holding hole 11 of the cylindrical main body 2 from the fixing flange 1 side. The formed tapered slope 18 for adjustment is compressed with the compression coil spring 9 compressed.
The laser diode 8 is screwed into the rear end of the holding hole 11 while being pressed by the tip of the focus adjustment screw 16 and assembled, and the laser light from the laser diode 8 is converged on the rod lens 3 by the collimating lens 7. As described above, by loosening the focus adjusting screw 16, the lens holding pipe 5 is finely moved in the axial direction, and set and fixed to the slide allowance portion 19 with the fixing screw 17 in a state where the convergence position is determined.

The rod lens support plate 4 is formed of a warped spring member having a light passing hole 21 in the central horizontal direction, so that the rod lens 3 does not obstruct the passage of light rays while the light passing hole 21 is closed. And fix both ends of the rod lens support plate 4 to the base 5 such that the horizontal center axis of the rod lens 3 is perpendicular to the optical axis of the laser beam.
, And the base 5 is fixed to the female screw hole 10 of the fixing flange 1 provided on the open end of the cylindrical main body 2 .

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

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

The structure is such that a support 24 pivotally supported by a pivot shaft so as to be swingable like a weight in a vertical plane at a central portion of a horizontal frame 23 supported by a support standing upright on a base 22. At the upper end from the pivotal position, the mounting surfaces 1 formed on both sides of the cylindrical main body 2 in the body radial direction with the optical axis of the laser light projected from the laser light emitting device aligned with the center vertical line of the support 24.
5 is assembled by screwing using the female screw hole 14 for attachment, and the light from the laser light radiating device radiated parallel to the vertical plane through the rod lens 3 is radiated by the cover body 25. It is used to radiate from the slit 26 to the outside and form a laser projection line on the floor, wall, and ceiling in the room.

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

In the case where the support 24 is used for a blackout laser device, the support 24 is swingably supported on a vertical plane.
Although the laser light emitting device A is fixed at the upper end portion from the pivot position, the laser light emitting device A may be fixed below the pivot position and may 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 denotes a switch, reference numeral 28 denotes a battery power supply, and reference numeral 29 denotes a braking unit using magnetic lines of force.

[0024]

According to the laser light emitting device of the present invention constructed as described above, the front end of the focus adjusting screw provided on the cylindrical main body is held inside the cylindrical main body with the rear end supported by a compression coil spring. Because it is in contact with the tapered slope for adjustment of the lens holding pipe housed in the lens, the tightening and loosening of the focus adjustment screw makes use of the compression and restoration of the compression coil spring.
The lens holding pipe can be fine-adjusted in the axial direction, allowing fine focus adjustment to form accurate and clear laser projection lines and laser projection points, and is easy to manufacture and assemble. Laser light emitting device with high cost can be provided at low cost.

As described in claim 3, the rod lens is horizontally or vertically mounted on a rod lens support plate made of a warped spring member having a light transmitting hole at the center while the light transmitting hole is closed. When the both ends of this rod lens support plate are fixed with screws to the end opening surface of the cylindrical main body,
Since the center axis of the rod lens can be adjusted and fixed to be perpendicular to the optical axis of the laser beam,
The laser beam can be diffused without impairing the rectilinearity, and a high-precision accurate horizontal projection line or a vertical projection line can be formed by projection.

[Brief description of the 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 the laser light emitting device according to the 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 blackout laser device for projecting a laser line in a vertical direction.

[Explanation of symbols]

 Reference Signs List A laser beam 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 step 14 Female screw hole for mounting 15 Mounting surface 16 Focus adjustment screw 17 Fixing screw 18 Taper slope for adjustment 19 Slide allowance section 20 Lens room 21 Light transmission hole 22 Base 23 Horizontal frame 24 Support 25 Cover 25 Light emitting Slit 27 Switch 28 Battery power supply 29 Braking unit

Claims (3)

(57) [Claims] 1. A lens holding pipe having an outer periphery at a front end formed with a tapered slope for adjustment, a slide allowance in the axial direction formed at an outer periphery at an intermediate portion, and a lens chamber formed inside a rear end, and housed in the lens chamber. A collimating lens, a compression coil spring that presses the lens holding pipe from a rear end,
A laser diode disposed behind 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 an adjusting tapered slope of the lens holding pipe. laser port, characterized in that a fixing screw which is brought into contact with the adjusting screw and the slide permitting portion
Into laser light source device for projection. 2. The laser beam emitting apparatus according to claim 1, wherein a rod lens is fixed to the opening at the tip end of the cylindrical holding hole so as to extend in the direction perpendicular to the laser optical axis. . 3. A rod lens supporting plate comprising a warped spring member having a light-transmitting hole at the center, wherein the rod lens is fixed to the cylindrical main body and the rod lens is closed with the light-transmitting hole closed. 3. The laser light emitting device according to claim 2, wherein the laser light emitting device is fixed horizontally or vertically, and is a means for screwing both ends of the rod lens support plate to a tip end opening surface of a cylindrical main body.