JP4524344B2 - Laser marking machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention forcibly stops the suspension of a suspended body such as a lens barrel suspended by a gyro to ensure the vertical posture of the laser module when carrying or storing in a case. Further, the present invention relates to a laser marking device that protects each of the surrounding parts.
[0002]
[Prior art]
The laser marking device irradiates the indoor wall surface or ceiling surface with a linear or dotted laser beam from the laser module based on the vertical posture. This is a reference device that is useful for various work such as construction and interior based on the reference line of ground ink etc., and has a gyro at the upper end of the pillar material standing on the support base to ensure the vertical posture of the laser module A suspension body represented by a lens barrel is suspended from the gyro so as to be swingable, and a laser module is supported on the suspension body. A donut-shaped swing restricting plate that restricts swinging of the suspended body within a predetermined range is disposed around the lower portion of the suspended body. The suspended body here refers to a rocking member such as a lens barrel or a metal cylinder.
[0003]
By the way, since this suspended body is suspended in a swingable state as described above, when the laser marking device is carried in the case, the suspended body will vibrate strongly and hit the swing regulating plate with an impact. As a result, the suspended body and its peripheral parts may be damaged, the peripheral part including the swing restricting plate may be damaged, or each part in the apparatus may be broken or misaligned. In addition, in the case of a laser marking device having a structure in which the suspended body is rocked and stopped with a magnet, the suspended body remains tilted if it is stored in a case and laid down for a long time. Therefore, a part of the swinging stationary plate having a donut shape fixed to the lower peripheral surface of the suspended body is magnetized, and there is a possibility that the swinging stationary will not be performed in a well-balanced manner during the inking operation.
[0004]
For this reason, recently, a laser marking device has been developed to prevent such a situation from occurring. For example, the “laser device for inking” described in JP-A-9-145371, the “laser device for inking” described in JP-A-10-96628, and the like.
[0005]
In the “inking laser device” described in Japanese Patent Laid-Open No. 9-145371, a laser unit mounting body (suspended body) is held by a pair of clamping bodies that clamp the lower part of the laser unit mounting body from the left and right, It has a structure in which a gear that opens and closes the sandwiching body, a lever that rotates the gear, and a spring that allows the pair of sandwiching bodies to be opened easily is assembled. It is done with something that can be locked in the open position.
[0006]
In the “laser-developing laser device” described in Japanese Patent Laid-Open No. 10-96628, the laser unit mounting body (suspended body) is held in synchronism with the operating means and in three directions in accordance with the operation of the operating means. This is done with a structure in which three holders that approach and leave are assembled.
[0007]
[Problems to be solved by the invention]
However, according to the holding structure of the laser unit mounting body (suspended body) in the “inking laser apparatus” described in Japanese Patent Laid-Open No. 9-145371 described above, the pair of sandwiching bodies can be opened and closed synchronously on one end side. Due to the gears engaged with each other, the pivoting part of the clamping body is loosened due to long-term use, and it is easy for rattling to occur, and the gears are easily disengaged when the lever is operated. There was a problem with sex. Further, in order to keep the sandwiching body sandwiched, a troublesome operation of locking the lever with the lever latch slit lever is necessary.
[0008]
Such a problem does not occur in the “inking laser device” described in Japanese Patent Laid-Open No. 10-96628, but there is a problem that the structure is complicated and bulky in the height direction, and the laser unit mounting body is held between There was a possibility that the holding body naturally opened due to the weight of the mounting body and the force in the swinging direction during the carrying.
[0009]
More importantly, in the two types of inking laser devices described above, there is a possibility that the inking operation may be performed in a state where the sandwiching body is not completely opened.
[0010]
The present inventor was concerned about the above-mentioned problems in the inking apparatus according to the prior art, and started to develop a new technique for solving these problems. As a result of intensive studies, examinations, and tests thereafter, the inventors finally completed the invention of the laser marking device according to the present invention.
[0011]
The laser marking device according to the present invention, which has been completed through such a process, can hold the suspended body in a vertical posture with a pair of sandwiching bodies, as well as a spring attached. Ensuring the opening and closing of a pair of clamping bodies by force will ensure the clamping and swinging of the suspended body, providing excellent stability and durability, excellent operability and operability, and complete suspension It is an object of the present invention to provide a laser marking device which prevents the marking operation from being performed when it is not in a swingable state or informs the operator of the state.
[0012]
The laser marking device according to the present invention proposed to achieve the above object includes a gyro above the base, and a suspended body made of a lens barrel is suspended by the gyro so that the suspended body can swing freely. The vertical posture recovery force of the laser module ensures the vertical posture of the laser module and irradiates at least one of the horizontal straight ink marking line, vertical linear ink marking line, and ground ink with the laser beam based on the vertical direction. A laser marking device that
The pair of right and left holding member having a plate shape can be clamped at the bottom of the suspended body is opened and closed from the opposite side of the lower part of the suspended body, 該Sayu pair in order to open and close operation of the pair of left and right holding member And an actuating member that pin-supports the sandwiching body is provided at a position substantially along the upper surface of the base or the upper surface of the support plate supported on the base,
The opening and closing of the extension the front portion out of the pair of left and right holding member and the fulcrum is, by sliding the operating member to the left or right direction by operating the operation portion of the operation member, the pair of right and left sandwiching A portion extending further to the right from the front portion of the left sandwiching body constituting one side of the body, and a portion extending further to the left from the front portion of the right sandwiching body constituting the other side Each is done by operating through a pin,
The open / close position of the pair of left and right holding members is configured to be maintained by a fulcrum spring having one end supported by the actuating member and the other end supported by a pin upward from the support plate. .
[0013]
The suspended body used in the laser marking device according to the present invention is an oscillating body such as a lens barrel or a cylindrical metal rod, and the vertical posture recovery force associated with the oscillating of the suspended body is used for the laser module. A vertical posture is maintained. That is, the laser module recovers the vertical posture after swinging integrally with the suspended body.
[0014]
The main part of the present invention is that when the laser marking device is not used, the suspended body is held in a vertical posture and the lower part thereof is held by a holding body so that the swinging body cannot be swung. In this way, for example, when carrying or storing while lying down, the suspended body does not swing, and the suspended body does not maintain the tilted position. It is no longer damaged and causes no trouble in swinging accuracy such as distortion or magnetism of the gyroscope, the suspended body and its surrounding parts.
[0015]
The sandwiching body that fixes the swinging of the suspended body is a pair of left and right ones that opens and closes with one point as a fulcrum, and is not necessarily limited, but is a metal plate in which a curved portion is formed in an opposing part. What is formed is desirable. The pair of holding members is opened and closed by sliding the operating member left or right.
[0016]
This operating member is not necessarily limited, but has a plurality of long holes that are supported by pins so as to be slidable in the left-right direction, and has a large diameter that protrudes in a state where the lower part of the lens barrel can swing freely. It is best to use a metal plate formed with a metal plate with an operating portion extending in one direction, and a pair of sandwiching bodies are disposed at positions substantially along the upper surface of the operating member. It is desirable to ensure the stability of the sandwiching body and the reliability of the opening / closing operation so as not to be bulky.
[0017]
Supporting the operating member is excellent in stability and smooth sliding by inserting a long hole formed in the operating member into a pin protruding from the upper surface of the base or the upper surface of the support plate positioned on the base. Is preferable. It should be noted that the top surface of the base is that the present invention can be applied to a laser marking device in which parts necessary for marking are directly mounted on the base. On the other hand, the support plate positioned on the base means a rotary plate that is rotatably supported on the base, and the laser ink having a structure that rotates the laser ink main body horizontally with respect to the base. It is stated that the present invention can also be applied to a dispenser.
[0018]
The pair of left and right sandwiching bodies is supported by supporting the overlapping base portion of the pair of sandwiching bodies on a single pin projecting upward from the top surface of the base or the top surface of the mounting base, and further on the left and right surfaces of the operating member. If the configuration is made by pin-supporting either one of the two long holes formed in the left-right oblique direction and one point of the right-and-left clamping body, There is an advantage that a certain suspended body can be securely sandwiched and fixed by the sandwiching body, and the operation of the sandwiching body can be performed by the operating member, so that the structure is simple and stable movement can be ensured.
[0019]
It should be noted that the pair of sandwiching bodies can be reliably opened and closed, and when the sandwiching body is closed, the suspended body is sandwiched and fixed so as not to move, and the position can be maintained when the sandwiching body is open. As described above, it is preferable that the sandwiching body or the operating member is biased by the panel. In particular, it is desirable that the support of this spring exceeds the fulcrum.
[0020]
With this configuration, the suspended body can be fixed by being sandwiched between the pair of sandwiched bodies in a state substantially close to a vertical posture by an operation by an operator, and as a result, the suspended body and the surrounding parts can be protected. The laser marking device can be stored and carried without problems.
[0021]
By the way, it must be anticipated that the operator will make a mistake such as performing the inking operation without forgetting to release the holding state of the suspended body. For this reason, in the present embodiment, the inking operation cannot be performed when the suspended body is sandwiched. There are two ways of thinking.
[0022]
One way of thinking is that the detection means for detecting the position of the operation member or the holding body when the operation member slides to the left or right and the pair of holding bodies is in the open or closed state is a base or support base Alternatively, in the vicinity thereof, when the power source is in an ON state and the suspended body is fixed by the pair of sandwiching bodies, by receiving the detection signal from the detection means or not receiving the detection signal, It is configured so that the operator can be notified by a display lamp, an alarm sound, or a voice display that the unloading operation is not possible.
[0023]
Another way of thinking is that the electric circuit from the power source to the laser module is cut off when the operating member slides to either the left or right side and the pair of sandwiching bodies are closed.
The circuit for this cuts off the electric circuit from the power source to the laser module when the clamping body is in the clamping state, and connects the electrical circuit from the power source to the laser module when the clamping body is fully open. A structure that interrupts an electric circuit is sometimes mentioned. As another circuit structure, there is a structure in which the laser module is connected to the blinking circuit when the holding body is completely opened.
[0024]
In this way, the operator can instantly know whether or not the inking operation is being performed while holding the suspended body, and the inking operation cannot be performed.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Next, specific embodiments of the laser marking device according to the present invention will be described in detail with reference to the accompanying drawings.
[0026]
FIG. 1 is a side sectional view showing a laser marking device (hereinafter abbreviated as a laser marking device of this embodiment) according to an embodiment of the present invention, and FIG. 2 is a plan view of the same. In each of these drawings, the case covering the periphery is in a removed state so that the inside can be clearly understood.
The outline of the laser marking device 1 of this embodiment will be described with reference to FIGS.
The laser marking device 1 of this embodiment is configured by assembling a laser marking device body 2 on a base 3 so as to be horizontally rotatable. For this reason, a support stand is called a turntable.
[0027]
The base 3 is formed with a leg mounting portion 3a that supports the legs 10... Downwardly projecting from a portion that divides the circumferential direction of the lower part into three equal parts. 3b has an eaves shape protruding upward.
[0028]
A worm wheel gear 4 is fitted on the outer periphery of the short cylindrical portion 3b from above while being in contact with the inner bottom of the base 3. Further, from above the worm wheel gear 4, a ball bearing 6 and a flange surface on the upper end are provided. The swing base 9 having a short cylindrical shape in which a stepped portion is formed on the central peripheral surface portion of the inner wall and the pole bearing 5 are sequentially fitted into the short cylindrical portion 3b, and from above the A nut 7 is screwed onto a screw portion 3c formed on the outer peripheral surface of the upper end portion of the short cylindrical portion 3b, and the worm wheel gear 4 and the pole bearings 5 and 6 are supported by the short cylindrical portion 3b.
[0029]
And the outer periphery of the said ball bearings 5 and 6 has the short cylinder shape in which the flange surface was formed in the upper end part for supporting the turntable 8 which comprises the lower end part of the laser marking device main body 2 mentioned later. The attachment member 9 is supported.
[0030]
Next, the structure of the laser marking device body 2 will be described.
The laser marking device main body 2 indicates a portion above the turntable 8 and includes components necessary for marking.
As shown in FIGS. 1 and 3, the turntable 8 has an outer diameter that fits into the cage above the base 3, and an opening 8 a having a size substantially equal to the outer diameter of the ball bearing 5 at the center. And is made of a metal plate having a rib 8b formed by raising an outer peripheral end upward.
[0031]
As shown in FIG. 1, the turntable 8 has a central opening 8 a fitted into the upper end edge of the pole bearing 5 and is placed on the flange surface at the upper end of the mounting member 9. It is fixed with screws 13. For this reason, the turntable 8 is rotatable in the horizontal direction with respect to the base 3.
[0032]
As shown in FIG. 3 with reference to FIG. 1, column members 11 formed of narrow plate members are directed upward at several locations that equally divide the circumferential direction of the upper surface of the turntable 8. The upper base 12 made of a plate material having a donut shape is fixed to the upper ends of the column members 11. A gyro 19 is disposed in the central hole 12 a of the upper base 12.
[0033]
A swing table 14 is supported on the gyro 19 with a margin in the hole 12a, and an upper end portion of a lens barrel 15 as a suspended body is attached to the lower portion of the swing table 14. Further, a laser module 16 for irradiating vertical laser light and a laser module 12 for irradiating horizontal laser light are mounted on the upper surface of the swing support member 14 via a module support member 20.
[0034]
The lens barrel 15 houses a laser module 21 for irradiating a laser beam of a ground ink spot.
[0035]
An oscillating plate 23 made of an iron disc having a hole into which the lower portion of the lens barrel 15 enters is fixed at the lower portion of the lens barrel 15.
[0036]
And, magnets 22... 26... That make the swinging of the swinging plate 23 magnetically stationary are provided at positions away from the several places that equally divide the circumferential direction of the swinging plate 23 in the vertical direction. Yes. Reference numeral 24 denotes a support plate for the upper magnets 22.
[0037]
In addition, the pillar material 11 is provided with a plurality of dry batteries 31 as a power source for the laser marking device 1 of the present embodiment in a state where it is held in a battery case 30. This column member 11 is provided with a control circuit board 32 of the laser marking device 1 of this embodiment.
[0038]
In this way, the laser marking device main body 2 including the turntable 8 is rotatable in the horizontal direction with respect to the base 3. A worm gear 43 that rotates with the driving force of the motor 42 for rotating the laser marking device body 2 including the rotating table 8 in the horizontal direction is formed on the lower surface of the rotating table 8 together with the motor 42. The worm gear 43 is meshed with the worm wheel gear 4 provided in the upper part of the base 3.
[0039]
In such a configuration, the laser marking device 1 of the present embodiment is placed in the case without performing the marking operation as shown in FIGS. 3 and 4 with reference to FIG. When it is housed and placed sideways or when the laser marking device 1 is carried around, the lens barrel 15 that is a suspended body is fixed in a vertical posture so that the swinging is not performed. Yes. Hereinafter, the structure will be described in detail.
[0040]
The lens barrel 15 is fixed and released by a pair of left and right openable and closable holding members 57 and 58. The holding members 57 and 58 are opened and closed by sliding an operating plate 50, which is an embodiment of the operating member, in the left and right direction. To do.
[0041]
With reference to FIG. 5, the structure of the upper surface of the turntable 8 that supports the sandwiching bodies 57 and 58 and the operating plate 50 will be described. The lower portion has a large diameter at the left and right positions and the front position of the turntable 8. Three stepped pins 51, 55, 53 having a small diameter at the upper part are fixed upward.
[0042]
As shown in FIG. 6, the operating plate 50 has a large opening 50b formed at the center thereof, the left and right and front portions extend, and the elongated holes 50c are formed at the left and right portions, the front center, and the left and right portions. , 50f, 50k, 50d, and 50e are formed, and the end portion of the front portion extends further upward from the upper side to form the operation portion 50a, and the pin 50g is directed to the upper side of the right long hole 50f. It is formed of a metal plate which is fixedly protruded and has a switch operating surface 50h formed by bending a portion on the right side of the front end downward.
[0043]
As shown in FIG. 7, the left and right sandwiching bodies 57, 58 are formed such that the vicinity of the tip is largely curved in the opposite direction so that the small diameter portion 15a of the lower part of the lens barrel 15 can be easily sandwiched from the left and right. The front portion of the sandwiching body 57 further extends to the right side and pin holes 57a and 57b are formed in the front portion and the extending portion, and the front portion of the right sandwiching body 58 is also extended to the left side in the same manner. It is formed of a metal plate having a pair of left and right symmetrical shapes in which pin holes 58a and 58b are formed in the portion and the extending portion.
[0044]
As shown in FIG. 8, the left and right sandwiching bodies 57, 58 are assembled on the operating plate 50 by overlapping the front portions of the left and right sandwiching bodies 57, 58 up and down so that the right sandwiching body 58 has a left-hand pin. The pin 52 is inserted and supported from the hole 57b into the long hole 50d of the lower operation plate 50, and further, from the right front pin hole 58b of the left sandwiching body 57 into the long hole 50e of the lower operation plate 50. The pin 54 is inserted and supported toward the head.
[0045]
As shown in FIG. 8, the operation plate 50 that supports the left and right sandwiching bodies 57 and 58 is assembled on the turntable 8 as shown in FIGS. 3 and 4.
The assembling is performed on the turntable 8 shown in FIG. 5 in a state where the pin holes 57a, 58a formed on the front side of the left and right sandwiching bodies 57, 58 are overlapped with the long holes 50k of the operation plate 50 therebelow. A long hole 50c of the working plate 50 is formed in the upper part of the stepped pin 51 protruding to the upper part of the stepped pin 55, a long hole 50f of the working plate 50 is provided in the upper part of the stepped pin 55, and an upper part of the stepped pin 53 is provided. The long hole 50k and the pin holes 57a and 58a of the left and right holding members 57 and 58 are inserted, and the upper ends of the pins 51, 55 and 53 are locked with a C ring or the like to prevent them from coming off. ing.
[0046]
Then, both end portions of the fulcrum overspring 56 are connected to the tip portion of the stepped pin 55 projecting upward from the inside of the long hole 50f and the pin 50g projecting upward from the upper surface portion of the operation plate 50 in the vicinity thereof. Is supported.
[0047]
Further, a limit switch 60 that is operated by pressing the contact surface 50n is mounted on the turntable 8 in front of the contact surface 50n of the operation plate 50.
[0048]
In this state, when the operation portion 50a at the front end of the operation plate 50 is operated in either the left or right direction, the operation plate 50 is placed in the three long holes 50c, 50f, 50k formed in the operation plate 50. It is guided by the stepped pins 51, 55, 53 that have been inserted, and slides left and right. FIG. 9 is a view showing the movement of the operation plate 50. In this figure, the left and right clamping bodies are removed so that the support state of the operation plate 50 and its movement can be easily understood.
[0049]
Next, a method for fixing the lens barrel 15 with the left and right holding members 57 and 58 will be described.
FIG. 4 shows a state where the operating portion 50a of the operating plate 50 is operated to the right and the operating plate 50 is slid to the right to open the left and right holding members 57 and 58.
In this state, the lens barrel (15) is swingable, and an urging force is applied to the spring 56 located at the right end of the operating plate 50 in a direction in which both ends thereof are separated from each other. It has been pressed.
In this state, the left and right clamping bodies 57 and 58 are rotated in a direction to open with the stepped pins 53 at the front center as the fulcrum, with the front side pins 54 and 52 being pushed by the inclined edges of the long holes 50e and 50d. is doing.
[0050]
At this position, the operating surface 50h of the switch at the front end of the operating plate 50 is in a state where the arm 61 of the limit switch 60 is operated.
[0051]
As shown in FIG. 3, when the front side operation unit 50a is operated to the left with the fingertip from this state, the operating member 50 slides to the left, and the right pin 50g of the operating member 50 also moves to the left in response to this movement. In order to move, the spring 56 changes its direction and presses the actuating member 50 in the right direction by the urging force separating both ends. In this state, the left and right sandwiching bodies 37 and 38 are rotated in a direction to close with the stepped pins 53 in the center on the front side as the fulcrums, with the front side pins 54 and 52 being pushed by the inclined edges of the long holes 50e and 50d. Thus, the lower part of the lens barrel (15) is fixed in the vertical position.
[0052]
At this position, the operation surface 50 h at the front end of the operating plate 50 is moved backward to the left and away from the arm 61 of the limit switch 60.
[0053]
The limit switch 60 is electrically connected to the control circuit board 70 of the laser marking device 1 shown in FIG. 1, and when the limit switch 60 is in the ON state when the power is on, the laser marking is performed. A display lamp (not shown) provided on the outer surface of the dispenser 1 is lit. Note that the operator may be notified by an alarm sound or a sound display using an electronic sound instead of or in addition to the display by the display lamp. Further, the laser beam may be blinked.
[0054]
【The invention's effect】
As described above, according to the laser marking device according to the present invention described above, when the laser marking device is not used, the lower part of the barrel that is a suspended body can be fixed in a vertical posture by a pair of left and right clamping bodies. It came to be. As a result, it is possible to prevent breakage of the suspended body and surrounding parts due to the swinging of the suspended body, and to reduce the accuracy of the gyro, which is likely to occur when the suspended body is left on its side for a long period of time. This makes it possible to prevent defects in the vertical posture recovery force of the cylinder.
[0055]
In addition, when the lens barrel is clamped and fixed by the clamping body, the operator is notified of the display tube or electronic sound or voice display, or the ink marking operation is disabled. This makes it possible to eliminate the problem of inking the ink while fixing the swing.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a laser marking device according to an embodiment of the present invention with an outer case removed.
FIG. 2 is a plan view of the same.
FIG. 3 is a plan view showing a main part of the present invention and showing a state in which a lower part of a lens barrel is held by a holding body.
FIG. 4 is a plan view showing a main part of the present invention and showing a state in which a lens barrel is swingable by opening a sandwiching body left and right.
FIG. 5 is a plan view of a turntable.
FIG. 6 is a plan view of an operation plate.
FIG. 7 is a plan view showing a pair of sandwiching bodies.
FIG. 8 is a plan view showing a state in which a pair of clamping bodies is provided on an operation plate.
FIG. 9 is a plan view showing a supported state of the operating plate and its movement.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Laser marking device 2 Laser marking device main body 3 Base 8 Rotating table 15 Lens tube 15a Lower part of lens tube 50 Actuation plate 50a Operation part 57, 58 Nipping body 56 Spring beyond a fulcrum

Claims (4)

A gyro is provided above the base, and a suspended body made of a lens barrel is suspended by the gyro so that the vertical posture of the laser module is secured by the vertical posture recovery force of the suspended body, and the vertical direction is used as a reference. A laser inking device that irradiates at least one of a horizontal linear inking line, a vertical inking line, or a ground ink by laser light;
The pair of right and left holding member having a plate shape can be clamped at the bottom of the suspended body is opened and closed from the opposite side of the lower part of the suspended body, 該Sayu pair in order to open and close operation of the pair of left and right holding member And an operation member that pin-supports the sandwiching body is provided at a position substantially along the upper surface of the base or the upper surface of the support plate supported on the base,
The opening and closing of the extension the front portion out of the pair of left and right holding member and the fulcrum is, by sliding the operating member to the left or right direction by operating the operation portion of the operation member, the pair of right and left sandwiching A portion extending further to the right from the front portion of the left sandwiching body constituting one side of the body, and a portion extending further to the left from the front portion of the right sandwiching body constituting the other side Each is done by operating through a pin,
The open / close position of the pair of left and right holding members is configured to be maintained by a fulcrum spring having one end supported by the actuating member and the other end supported by a pin upward from the support plate. Laser marking device. The pair of sandwiching bodies and the actuating member are formed of a plate material, and the left and right sandwiching bodies are pin-supported at positions substantially along the upper surface of the actuating member,
Pin support of the actuating member is performed by inserting and supporting a plurality of pins protruding upward from the upper surface of the base or the upper surface of the mounting base through a long hole formed in the lateral direction in the sandwiching body,
Support pins supporting the pair of holding bodies, one pin from the turntable upper surface is protruded upward constituting the pair of the upper base of the overlapping and the base of holding member or the supporting plate Further, in the portion extending in the left and right direction of the operating member, the inside of one of the two long holes formed in the left and right diagonal direction and one point of either one of the right and left clamping bodies 2. The laser marking device according to claim 1, wherein the laser marking device is configured to be performed by supporting each pin. A detecting means for detecting the position of the operating member or the holding body when the operating member slides to the left or right and the pair of holding bodies is in the open or closed state is provided at the base or the support base or in the vicinity thereof. When the power source is in an ON state and the suspended body is fixed by the pair of sandwiching bodies, the inking operation cannot be performed by receiving the detection signal from the detection means or not receiving the detection signal. The laser marking device according to claim 1 or 2, wherein the operator can be notified of the presence of the problem by a display lamp, an alarm sound, or a voice display. 3. The laser marking device according to claim 1, wherein an electric circuit from the power source to the laser module is cut off when the operating member slides to the left or right to close the pair of holding members.

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