JP2001311622A - Laser device for marking - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laser device for marking that can show functions even if it is placed on a floor with a large inclination or the lie, is compact, and can be operated easily. SOLUTION: In this laser device for marking that is supported by one shaft, rocking directions L and R of an arm 2 where a laser module 4 is mounted, and longitudinal directions L and R of a box-shaped case 1 are made match with each other, a range where the arm 2 can be rocked is expanded, and at the same time, the device is stabilized even if the device is placed on a floor or the like that is greatly inclined in the rocking directions L and R. Also, by extending a member 9 to be rocked for composing a damping means 3 that is mounted to the arm 2 in the rocking directions L and R for the arm 2, a range where the arm 2 is fully damped by the damping means 3 is expanded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blackout laser device for projecting a vertical projection line onto an object to be irradiated such as a wall, a ceiling, or a floor.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. H11-118485, for example, shows this type of blackout laser device as shown in a left side sectional view of FIG. 7A and a front sectional view of FIG. There are things. This device includes an arm 32 that extends in the vertical direction U and D and is swingably supported in the left and right directions L and R in a box-shaped case 31 that is elongated in the front and rear direction in plan view, and swings the arm 32. A braking means 33 for braking is housed. Then, the laser module 34 is attached to the arm 32 so that a linear projection line is projected vertically from above by the laser beam 41 from above to forward with the arm 32 stopped by the braking of the braking means 33.

The braking means 33 is fixed to the case 31 so as to be opposed to the front and rear directions F and B with the braking member 39 interposed therebetween, for example, a copper plate attached to the lower part of the arm 32. Pair of magnets 40A, 40
B. When the arm 32 swings, an eddy current is generated in the braked member 39 by the magnetic fields of the magnets 40A and 40B, and an electromagnetic force in a direction opposite to the swinging direction of the arm 32 is applied to the braked member 39. The movement is braked. In response to the swing of the arm 32, the braking by the braking means 33 works in a range in which the member to be braked 39 and the magnets 40A and 40B overlap in a front view. The width is shorter than the width of the arm 32, and the width of the magnets 40A, 40B is even shorter.

According to this device, the arm 32 swings in the left and right directions L and R due to the moment due to gravity even if the arm is placed on a floor or the like inclined in the left and right directions L and R. The laser module 34 is stopped because it is braked and the arm 32 stops in the vertical direction in front view.
A vertical projection line is projected on an object to be irradiated, such as a wall, a ceiling, or a floor, by a laser beam 41 generated from the laser beam 41. Even if the floor or the like on which the device is placed is inclined in the front-rear direction F or B, as long as the bearing that supports the arm 32 is within the range in which it operates smoothly, the function of projecting the vertical projection line is provided. Has no effect. This device has a complicated configuration in which the arm is supported by two axes orthogonal to each other in a horizontal plane and swings in two directions. It is. In such a uniaxially supported blackout laser device, even if it is placed on a floor or the like having a large inclination in the swing direction of the arm 32, that is, the left and right directions L and R,
It is important to be able to perform functions.

[0005]

However, in the conventional apparatus, as is apparent from FIG. 7, the case 31 has a box shape which is long in the front and rear directions F and B in a plan view and short in the left and right directions L and R. Therefore, when the device is placed on a floor or the like having a large inclination in the left and right directions L and R, the device is unstable. In addition, the range in which the arm 32 can swing in the left and right directions L and R in the case 31 and is sufficiently braked. Actually, it is as narrow as 5 degrees at most on each side.
Therefore, in this state, it can be applied only to a floor or the like having a small inclination in the left and right directions L and R. So Case 1
Screwed legs 44A and 44B for height adjustment
However, even if the attitude of the case 31 is adjusted by using them, the range of inclination in the left and right directions L and R of the floor or the like to which the apparatus can be applied is only slightly widened, It is still stable, and the screwed legs 4
Because of the provision of 4A and 44B, the configuration of the device becomes complicated, which is against miniaturization, and the operation of adjusting the posture is also complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and provides a function of a marking laser device for projecting a vertical projection line on an object to be irradiated even if it is placed on a floor having a large inclination. It is an object of the present invention to provide an ink-marking laser device which is compact, easy to configure and easy to operate.

[0007]

In order to achieve the above object, the present invention provides a blackout laser device which extends vertically in a box-like case elongated in the left-right direction in plan view and swings in the left-right direction. It houses an arm freely supported, braking means for braking the swing of the arm, and a laser module. The laser module is attached to the arm such that the laser module projects a linear projection line in a vertical direction from above to forward in a state where the arm is stopped by braking of the braking means. Further, the braking means includes a member to be braked made of a nonmagnetic conductor attached to a lower portion of the arm, and a magnet fixed to the case so as to face the front and rear direction with the member to be braked interposed therebetween. And the braked member extends in the left-right direction with respect to the arm.

According to the device of the present invention, since the case has a box shape elongated in the left-right direction in plan view, the device is stable even when placed on a floor or the like having a large inclination in the left-right direction, and the arm swings in the left-right direction. The movable range can be set wide. In response,
Since the member to be braked extends in the left-right direction with respect to the arm, the range in which the member to be braked and the magnet overlap in a front view with respect to the swing of the arm is widened, and the range in which the arm is sufficiently braked by the braking means. Also becomes wider. Therefore, the function of projecting a vertical projection line can be exerted even when placed on a floor or the like that has a large inclination in the swinging direction of the arm, that is, in the left-right direction.

On the other hand, as described above, one such as the present invention is used.
In the case of a shaft-supported ink-marking laser device, even if the floor on which the device is placed is inclined in the front-rear direction, it does not affect the function so much. Function will be able to be demonstrated. Also, 1
Since it is a shaft support and it is not necessary to provide a screw-in leg or the like for expanding the applicable range as shown in the above-mentioned prior art, it is small in size and simple in configuration and operation.

[0010] In a preferred embodiment of the present invention, the case has a slope portion forming an upwardly and forwardly facing slope on the upper side and the front side, and a front portion connected on the upper side to the slope portion and a front portion on the front side. And an elongated passage hole extending from the upper portion to the front portion via the slope portion to allow the laser light from the laser module to pass therethrough. A shutter mechanism for opening and closing the passage hole is provided. According to this embodiment, the space above and in front of the device, which was a dead space, is not included in the device, so the device is further reduced in size, and only a part of the case is cut out to form a passage hole. Therefore, the laser beam from the laser module can be passed through and radiated to the outside of the apparatus without using a transparent member or the like. When the apparatus is not used, the passage hole is closed by a shutter mechanism, and dust or the like is contained inside the apparatus. Can be prevented from entering.

In a further preferred embodiment of the present invention, a switch for turning on and off the generation of laser light from the laser module and a lock mechanism for fixing and releasing the arm are provided. And the release and fixation of the lock mechanism are linked with each other. According to this embodiment, when the device is not used, the arm can be fixed by the lock mechanism to prevent rattling of the support of the arm, and
Opening and closing the shutter mechanism, turning on / off the generation of laser light,
Since it is not necessary to separately operate and release the lock mechanism, the operation is further simplified.

In another preferred embodiment of the present invention, a pair of contact terminals fixed to the case on the left and right sides of the member to be braked, and one of the contact terminals is attached to one of the contact terminals. An LED that emits light by conducting when the braking member comes into contact with the LED; and an LED that emits light to warn that the angle of the arm with respect to the case has reached a limit of a swingable range by emitting light. I have. According to this embodiment, it can be seen that the inclination of the floor or the like on which the device is placed in the left-right direction is out of the applicable range of the device with a simple and low power consumption configuration.

[0013] In still another preferred embodiment of the present invention, a pair of electric wires are arranged on the left and right sides of the arm for supplying a current to the laser module, and one ends of both electric wires are fixed to the arm. And the other end is fixed to the case.
A copper wire of not more than 06 mm and not less than 0.02 mm is used. According to this embodiment, even if the case of the uniaxially-supported ink-marking laser device is formed in a box shape elongated in the left-right direction in plan view and is downsized, the laser module swinging with the arm is supplied with current from the left and right. Even if the electric wire for supplying is shorter than before, it is sufficiently flexible and does not resist the swing of the arm. Therefore, the function can be exerted with sufficient accuracy even when placed on a floor with a large inclination. In particular, the wire has a diameter of 0.3 mm.
It is preferable to use a 05 mm copper wire.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; First, the configuration of this device will be described. As shown in the plan view of FIG. 5, this device includes a box-shaped case 1 that has a rectangular shape elongated in the left and right directions L and R in plan view. In addition,
Left and right refer to left and right as viewed from the front of the device. As shown in the perspective view of FIG. 4, the case 1 has a pentagonal prism shape in which the upper front side of a rectangular parallelepiped that is long in the left and right L, R and short in the front and rear F, B is obliquely cut off, and has a case body 1a. The case cover 1b is screwed to the base. In this embodiment, the case body 1a, the case lid 1
b is manufactured by, for example, sheet metal processing of an iron plate, but may be manufactured by resin molding or the like.

The case lid 1b has a slope 1d that forms a slope facing upward and toward the front F on the upper side and the front side of the case 1, and an upper part 1c connected to the slope 1d on the upper side and a front side connected to the front side. A portion 1e and left and right side portions 1f (FIG. 5) and 1g, and an elongated passage hole extending from the upper portion 1c to the front portion 1e via the slope portion 1d in order to pass laser light from a laser module described later. 1j is formed by notching. The case body 1a forms a rear portion 1h (FIG. 5) and a lower portion 1i of the case 1. The lower part 1i of the case is flat without screwing legs or the like for height adjustment.

As shown in FIG. 1, which is a front view showing a state in which the case lid 1b is removed, this device is
An arm 2 made of, for example, aluminum and extending in the vertical directions U and D and swingably supported in the left and right directions L and R, a braking means 3 for braking the swing of the arm 2, and a laser module 4 are housed therein. ing. For this purpose, first, a support plate 5 which is, for example, an aluminum plate of a J-shape (a back-facing J-shape in FIG. 2 which is a left-side cross-sectional view) as viewed from the right side is fixed to the case main body 1a by bonding or the like. I have.

As shown in FIG. 2 which is a sectional view taken along the line II-II, an outer ring of a bearing 6 such as a ball bearing is fitted into a hole provided in an upper portion of the arm 2, and an inner ring of the bearing 6 and a bearing 6 are provided. Screws 8 are inserted into the front and rear spacers 7A and 7B, which are, for example, brass tubes, and screwed into screw holes provided in the upper part of the support plate 5, so that the head of the screw 8 is fixed to the front spacer 7A and the inner ring of the bearing 6. The rear spacer 7B is fastened to the support plate 5. That is, in FIG. 1, the arm 2 is attached to the support plate 5 and thus the case body 1 a via the bearing 6 and the spacers 7 A and 7 B before and after the bearing 6 (perpendicular to the paper surface) along the circumferential direction around the screw 8. It is swingably supported in left and right directions L and R. By holding the bearing 6 between the spacers 7A and 7B from the front and rear in this way, it is possible to reduce the backlash of the support of the arm 2 particularly in the front and rear direction. The front spacer 7A
Alternatively, another bearing may be used, that is, the arm 2 may be supported via two bearings stacked in the front-rear direction.

As shown in FIG. 2, a damped member 9 made of a non-magnetic conductor, for example, a copper plate is attached to a lower portion of the arm 2. Then, a pair of magnets 10A and 10B, for example, Nd-Fb-B magnets, are provided on the front and rear sides of the lower portion of the support plate 5 so as to face the front and rear directions F and B with the braked member 9 interposed therebetween. Installed. That is, the magnet 10
A and 10B are fixed to the case body 1a. The braked member 9 and the magnets 10A and 10B constitute the braking means 3. As shown in FIG. 1, the member to be braked 9 is U-shaped and extends in the left and right directions L and R with respect to the arm 2.

When the arm 2 is stopped by the braking of the braking means 3, the laser module 4 projects a linear projection line in the vertical direction from above U to front F with the laser beam 11, as shown in FIG. As shown in the figure, the arm 2 is attached to a hole provided in the center of the arm 2 by being fastened with a set screw from the left and right (perpendicular to the paper surface) facing obliquely upward from the front F. The laser module 4 includes a laser oscillator,
It has a collimating lens and a rod lens.

As shown in FIG. 3, which is a view of the case lid 1b detached from the case main body 1a and viewed from the rear, the apparatus comprises a shutter mechanism 12 for opening and closing the passage hole 1j,
A switch 13 (FIG. 1) for turning on / off the generation of the laser beam 11 (FIG. 2) from the laser module 4 and a lock mechanism 14 for fixing and releasing the arm 2 (FIG. 1) are provided. The on / off of the switch 13 and the release and fixing of the lock mechanism 14 are linked.

Specifically, first, a shutter body 12a which is a stainless plate, for example, which is bent along the case upper portion 1c, the case slope portion 1d, and the case front portion 1e is arranged inside the case lid 1b. Case slope 1
Outside the operating member 12, for example, a stainless plate
b (FIG. 4). Also, the case slope 1d
Are formed with long holes 12c in the left and right directions L and R. The operating member 12b is provided with a male screw 12d toward the inside of the case slope portion 1d.
A nut 12e is screwed through 2c and a hole formed on the right side (left side in FIG. 3) of the slope of the shutter main body 12a, and the distal end of the male screw 12d is caulked so as not to come off. Here, the shutter body 12a and the operating member 1
A play is provided between 2b and the case slope 1d.

Further, a front portion (lower portion) of the shutter body 12a.
Also, a long hole 12f in the left and right direction L, R is formed, and a male screw 12g provided rearward inside the front part 1e of the case.
Is passed through the elongated hole 12f, a spacer (not shown) and a flat washer 12h are inserted, and the nut 12i is screwed and fastened. Shutter body 12a, operation member 12b, slot 1
2c, 12f, external threads 12d, 12g, a spacer, a flat washer 12h, and nuts 12e, 12i constitute a shutter mechanism 12 for opening and closing the passage hole 1j. The shutter body 12a and the operating member 12b are integrated into a case. It is slidable in the left and right directions L and R with respect to the lid 1b.

On the other hand, as shown in FIG. 1, a switch 13, which is a push-type limit switch for turning on and off the generation of the laser beam 11 (FIG. 2) from the laser module 4, is provided outside a front portion of a battery box 15 described later. It is attached and is at the position shown by the two-dot chain line in FIG. At the front of the shutter main body 12a, a holding member 16 which is substantially L-shaped when viewed from the bottom, for example, an iron plate, is attached by spot welding or the like.
When the passage 2a is moved to the right and the passage hole 1j is opened, the pressing member 16 presses the leaf spring of the switch 13 to turn on the switch 13 and generate the laser beam 11 (FIG. 2) from the laser module 4. . When the shutter main body 12a is moved to the left and the passage hole 1j is closed, the pressing member 16 is separated from the leaf spring of the switch 13 and does not press, the switch 13 is turned off, and the laser light 11 from the laser module 4 (see FIG. Stop the occurrence of 2).

Further, a lock member 17 which is a spring plate made of, for example, stainless steel is provided on an upper lower side of the shutter body 12a.
Is attached by spot welding or the like, and the shutter body 1
When the passage 2a is moved to the left and the passage hole 1j is closed, the lock member 17 presses the flat upper edge of the arm 2 downward, and swings the arm 2 along the vertical direction U, D of the case 1. Fix it not to. When the shutter main body 12a is moved to the right and the passage hole 1j is opened as shown by the two-dot chain line, the lock member 17 is separated from the upper edge of the arm 2 and does not press, so that the arm 2 can swing ( Release). That is, the lock member 17 attached to the shutter body 12a of the shutter mechanism 12 constitutes a lock mechanism 14 for fixing and releasing the arm 2.

With this lock mechanism 14, the arm 2 is fixed when the apparatus is not used, so that it is possible to prevent rattling of the support of the arm 2. Further, with the above configuration, the opening and closing of the shutter mechanism 12, the turning on and off of the switch 13, and the releasing and fixing of the lock mechanism 14 are interlocked. Accordingly, since the opening and closing of the shutter mechanism 12, the on / off of the generation of the laser beam 11 (FIG. 2), and the release and fixing of the lock mechanism 14 do not need to be separately operated, the operation is simplified.

Further, as shown in FIG. 1, a pair of contact terminals 18A and 18B, which are, for example, phosphor bronze plates, are provided with respect to the member 9 to be braked in a circumferential left direction L and a right direction centering on the screw 8. In the direction R, it is fixed to the support plate 5, that is, fixed to the case 1. An LED (light emitting diode) 19 that conducts and emits light when the member to be braked 9 comes into contact with one of the contact terminals 18A and 18B has a case lid 1b (FIG. 4) on the upper right side of the case body 1a. It is attached to the part bent forward. In addition, a hole is formed in the corresponding portion of the case lid 1b (FIG. 4) so that the tip of the LED 19 is exposed.

The contact terminals 18A and 18B and the LED 19
When the LED 19 emits light, the warning means 20 warns that the angle of the arm 2 with respect to the vertical direction of the case 1 has reached the limit of the swingable range (for example, 21 degrees to the left and right, respectively). The warning means 20 indicates that the inclination of the floor or the like on which the device is placed in the left-right direction is out of the applicable range of the device with a simple and low power consumption configuration.

Furthermore, in order to reduce the burden of supporting the arm 2 when the arm 2 is rocked violently with the lock mechanism 14 released, a pair of cushioning members 21A and 21B made of rubber, for example, are used. , The support plate 5 at the left L and the right R in the circumferential direction around the screw 8 with respect to the arm 2.
, That is, fixed to the case 1.
Here, the cushioning members 21A, 21B are connected to the contact terminals 18A,
The arm 2 is arranged at a position where the arm 2 comes into contact with the swinging angle slightly larger than the contact of the braked member 9 with 18B.

As a power source required for light emission of the laser module 4 and the LED 19, for example, a lithium ion battery (not shown) is mounted on a battery holder 22 fixed in a battery box 15 provided on the right side of the case body 1a. It is stored. To replace the battery, a detachable lid (not shown) is attached to the right side of the rear part 1h of the case with screws. In addition, appropriate wiring and a circuit board are provided for the electrical operation of the device described above.

In particular, a pair of electric wires 23 are arranged on the left and right of the arm 2 to supply a current to the laser module 4,
One end of each of the electric wires 23 is fixed to the arm 2, and the other end is fixed to the case 1. For this electric wire 23, a copper wire having a diameter of 0.06 mm or less and 0.03 mm or more may be used. Preferably, the apparatus of the present embodiment uses a copper wire having a diameter of 0.05 mm. The reason and effect will be described later in detail. More specifically, one end of each of the electric wires 23 is soldered to a terminal 24 provided on the arm 2 to be electrically connected to the laser module 4, and the other end is provided to the support plate 5. And connected to the switch 13 and the battery via a lead wire 26.

Next, the operation of this device will be described.
First, for example, as shown in FIG. 6, this device is placed on the floor 50, facing the wall 51 to be blacked out, and the operation member 12b in FIG. Then, by this one simple operation, the passage hole 1j is opened, the arm 2 (FIG. 3) is unlocked, and the laser beam 11 is generated as shown in FIG. Then, in a state where the swing of the arm 2 (FIG. 1) is stopped by the braking of the braking means 3 (FIG. 1), the wall 51, the ceiling 52, and the floor 50 are arranged from above the device to the front.
A vertical projection line P in the vertical direction is projected on the object to be irradiated.

According to this device, as shown in FIG. 5, the case 1 has a box shape elongated in the left and right directions L and R in plan view. The device is stable even on a large floor, and the range in which the arm 2 can swing in the left and right directions L and R can be set wide. Correspondingly, since the member to be braked 9 extends in the left and right directions L and R with respect to the arm 2, the range in which the member to be braked 9 and the magnets 10 </ b> A and 10 </ b> B overlap with each other when the arm 2 swings. And the range in which the arm 2 is sufficiently braked by the braking means 3 is also widened. Therefore, the floor 50 of FIG.
The function of projecting the projection line P in the vertical direction can be exerted even if the inclination is large in the swing direction, that is, the left and right directions L and R, for example, even if the inclination is 20 degrees from the horizontal.

On the other hand, as described above, in the uniaxially supported blackout laser device as in the present embodiment, even if the floor 50 on which the device is placed is inclined in the front and rear directions F and B, its function is Since it has little effect, the function can be exerted even if it is placed on the floor 50 having a large inclination regardless of the direction. In addition, since it is a uniaxial support, and it is not necessary to provide a screwed leg or the like for expanding the applicable range as shown in the above-mentioned conventional technology, it is not necessary to make adjustments. .

Further, in this device, as shown in FIG. 4, the case 1 has an upper U
And a slope 1d forming a slope facing forward F, an upper portion 1c connected to the upper side of the slope 1d, and a front portion 1e connected to the front side. The laser beam 11 from the laser module 4 (FIG. 2) Through the upper part 1c
Elongate passage hole 1 extending from the front to the front part 1e through the slope part 1d
j is formed. Further, as shown in FIG. 3, a shutter mechanism 12 for opening and closing the passage hole 1j is provided. As can be seen with reference to FIG. 2, in order to further reduce the size of the device by removing the space above and in front of the device that becomes a dead space in front of the laser module 4 in side view,
As described above, it is necessary to provide the slope 1d in the case 1. Then, in order to pass the laser beam 11 from the laser module 4 and irradiate the outside of the device in a wide range from the upper portion U to the front portion F of the device, the front portion of the case passes through the upper portion 1c through the slope portion 1d. An elongated passage hole 1j extending to 1e is formed.

In order to prevent dust and the like from entering the inside of the apparatus, a transparent member made of plastic is usually fitted into the passage hole. However, if the shape of the transparent member is matched with the passage hole 1j of the apparatus, It has a bent shape, and is optically distorted at the bent portion, adversely affecting the function as a blackout device. On the other hand, when a flat plate-shaped transparent member is applied so as to be fixed at the upper end and the lower end of the passage hole 1j of this device, a gap is formed between the transparent member and the case lid 1b on the left and right sides. When the case lid 1b is manufactured by sheet metal processing as in the present embodiment, a complicated process is required to fill the gap, and if resin molding is used,
Bridging the gaps is easy, but requires a significant amount of mass production. Therefore, in this apparatus, a shutter mechanism 12 (FIG. 3) for opening and closing the passage hole 1j is provided without using a transparent member or the like.

According to the above configuration, the space above and in front of the dead space is not included in the device. Therefore, the size of the device is further reduced and the case 1 is partially cut away. The laser module 4 is formed only by forming the passage hole 1j without using a transparent member or the like.
When the apparatus is not in use, the passage hole 1j is closed by the shutter mechanism 12 (FIG. 3) so that dust or the like enters the apparatus when the apparatus is not in use. Can be prevented. It is to be noted that dust or the like may enter inside the apparatus when the apparatus is used. However, since the time for using the apparatus is significantly shorter than the time for not using the apparatus, there is no particular problem.

When the blackout operation is completed, the operation member 12b shown in FIG. Then, by this one simple operation, the passage hole 1j is closed, and the arm 2 (FIG. 3)
Is fixed, and the generation of the laser beam 11 stops. Since the device is small, it is convenient to carry it to the next place of use. Since the arm 2 (FIG. 2) is fixed, the support of the arm 2 (FIG. 2) may be loose due to vibration during transportation. There is no danger. Further, as described above, when the device is not used, the passage hole 1j is closed, so that dust and the like can be prevented from entering the inside of the device.

Generally, it is preferable to use a thin copper wire for the electric wire connected to the laser module so as not to cause resistance of the arm to swing. For example, in the conventional device shown in FIG. The electric wire 63 has a diameter of 0.
A 07 mm copper wire is used. This is 3 from the horizontal
When the projection line is projected on a wall 5m away by placing the device on a floor with an inclination of less than 5 degrees, the deviation in the left-right direction (horizontal direction) from the true vertical line is 3m in the vertical direction (vertical direction). Is within 1 mm. In maintaining this accuracy, the thickness of the electric wire is 0.07 mm in diameter.
It is believed by those skilled in the art that the problem is the problem of the braking means 33 such as the weight and shape of the member to be braked 39 and the shape of the magnet 40. Further, in order to obtain this accuracy, as described above, using the level,
The position of the device must be adjusted within 3 degrees from horizontal.

On the other hand, in the apparatus of the present embodiment, in order to cope with a floor having a large inclination, the case 1 of the uniaxially supported blackout laser apparatus as shown in FIG.
In this case, as shown in FIG. 1, the electric wires 23 for supplying current to the laser module 4 from the left and right try to avoid contact with the surroundings. When the length is shortened to about 3 to 8 cm, the repulsive force when pushed and bent is increased, and the conventional copper wire having a diameter of 0.07 mm or more is used, the weight of the member 9 to be braked is reduced. Even if the shape and the shape of the magnet 10 are adjusted, sufficient accuracy cannot be obtained on a floor with a large inclination exceeding 3 degrees from the horizontal, and the diameter is more flexible.
The present inventor has found that it is preferable to use a copper wire of not more than 06 mm and not less than 0.02 mm. The lower limit of the thickness depends on reasons such as workability during assembly.

In the apparatus of this embodiment, the diameter is 0.05 mm.
A 6 cm long copper wire coated with an insulating coating by spraying is used. According to this, from horizontal 2
Even if the projection line is projected on a wall 5m or even 10m away when the device is placed on a floor with a slope of 0 degrees or less (most floors usually applied fall within this range), it will be left and right with respect to the true vertical line. The deviation in the direction is 0 mm in a section of 3 m vertically.
Extremely high accuracy (less than 1 mm) can be obtained without adjusting the attitude of the device using a level or the like. It should be noted that even when a copper wire having a diameter of 0.06 mm is used, an effect similar to this and superior to the related art can be obtained.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a case lid is removed in a blackout laser device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a rear view of the case lid removed from the case main body in the apparatus of the embodiment.

FIG. 4 is a perspective view of the device.

FIG. 5 is a plan view of the same device.

FIG. 6 is a diagram showing an example of a use state of the device.

FIG. 7A is a left side sectional view of an example of a conventional blackout laser device, and FIG. 7B is a front sectional view of the same device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... case, 1c ... upper part of case, 1d ... slope part of case, 1e ... front part of case, 1j ... passage hole, 2 ... arm,
3 ... braking means, 4 ... laser module, 9 ... member to be braked, 10A, 10B ... magnet, 11 ... laser beam, 12 ... shutter mechanism, 13 ... switch, 14 ... lock mechanism, 18
A, 18B: contact terminal, 19: LED, 20: warning means, 23: electric wire, F, B: front and rear direction, L, R: left and right direction, U, D: vertical direction, P: projection line.

Claims (6)

[Claims] An arm extending vertically and supported in a horizontally elongated box-like case in a plan view and swingably in the left-right direction, braking means for braking the swing of the arm, and braking thereof A blackout laser device containing a laser module attached to the arm so that a linear projection line is projected in the vertical direction from above to forward with laser light when the arm is stopped by braking of the means. Wherein the braking means is fixed to the case so as to face a member to be braked made of a non-magnetic conductor attached to a lower portion of the arm, and to face in the front-rear direction with the member to be braked interposed therebetween. A blackout laser device having a magnet, wherein the member to be braked extends in the left-right direction with respect to the arm. 2. The case according to claim 1, wherein the case includes a slope portion forming a slope facing upward and forward at an upper side and a front side, and an upper portion connected to the slope portion at an upper side and a front portion connected to the front side at a front side. Have
An ink jetting laser device comprising: a slender passage hole extending from the upper portion to a front portion via a slope portion to allow a laser beam from the laser module to pass therethrough; and a shutter mechanism for opening and closing the passage hole. 3. The switch according to claim 2, further comprising: a switch for turning on and off the generation of laser light from the laser module; and a lock mechanism for fixing and releasing the arm, wherein the shutter is opened and closed and the switch is turned on and off. A black-out laser device in which the lock mechanism is unlocked and fixed. 4. A pair of contact terminals fixed to the case on the left and right sides of the member to be braked, according to claim 1, wherein the contact terminals include a pair of contact terminals. An LED that emits light by conducting when the member to be braked comes in contact with the LED; and a warning unit that warns that the angle of the arm with respect to the case has reached a limit of a swingable range by emitting light from the LED. Laser device for marking out. 5. The arm according to claim 1, wherein a pair of electric wires are arranged on the left and right sides of the arm for supplying a current to the laser module, and one ends of both electric wires are fixed to the arm. And the other end is fixed to the case, and the wire has a diameter of 0.06 mm.
A laser device for ink marking using a copper wire of 0.02 mm or more. 6. The laser according to claim 5, wherein a copper wire having a diameter of 0.05 mm is used for the electric wire.