Laser marking device

Abstract

To adjust an emission direction of a laser beam.SOLUTION: A laser marking device includes: a laser 57 for emitting a laser beam; a lens 58 where the laser beam enters and which emits the laser beam; and a holding part 59 for holding the laser 57 and the lens 58 inside. At the holding part 59, a recess part 593 is provided which is dented along a second direction crossing a first direction in which the laser 57 and the lens 58 are aligned side by side in the holding part 59. At least part of the recess part 593 is positioned between the laser 57 and the lens 58 in the first direction.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] TECHNICAL FIELD The present disclosure relates to laser markers, and more particularly to laser markers with optical elements. [Background technology]

[0002] BACKGROUND ART Conventionally, an aperture laser line marker that projects laser point light and line light onto an object has been known (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-28359 Summary of the Invention [Problem to be solved by the invention]

[0004] In an aperture laser line marker (laser marking device) such as that described in Patent Document 1, there is a demand for adjusting the emission direction of the laser point light and line light (laser light).

[0005] The present disclosure has been made in view of the above-mentioned circumstances, and has an object to provide a laser marking device that can adjust the emission direction of laser light. [Means for solving the problem]

[0006] A laser marker according to one aspect of the present disclosure includes a laser that emits laser light, a lens that receives the laser light and emits the laser light, and a holder that holds the laser and the lens therein. The holder is provided with a recess that is recessed along a second direction that intersects with a first direction in which the laser and the lens are aligned within the holder. At least a portion of the recess is located between the laser and the lens in the first direction. [Effects of the Invention]

[0007] According to the present disclosure, the emission direction of laser light can be adjusted. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a laser marker according to one embodiment of the present disclosure. [Figure 2] FIG. 2 is a front view of the laser marking device. [Figure 3] FIG. 3 is a cross-sectional view of the laser marking device. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the laser marking device. [Figure 5] FIG. 5 is an explanatory diagram for explaining a laser emission unit of the laser marking device. [Figure 6] FIG. 6 is an explanatory diagram for explaining an optical system of the laser marking device. [Figure 7] FIG. 7 is a diagram showing point light emitted from a comparative laser marking device. [Figure 8] FIG. 8 is a diagram illustrating a laser beam emitted from a laser marking device according to an embodiment of the present disclosure. [Figure 9] FIG. 9 is a cross-sectional view taken along line Z1-Z1 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] A laser marker 1 according to an embodiment of the present disclosure will be described in detail with reference to the drawings. Note that the drawings referred to in the following description are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios. Furthermore, the embodiment and modified examples described below are merely examples of the present disclosure, and the present disclosure is not limited to the embodiment and modified examples. Even if the embodiment and modified examples are different from these, various modifications can be made depending on the design, etc., as long as they do not deviate from the technical concept of the present disclosure.

[0010] (1) Overview First, an overview of a laser marking device 1 of this embodiment will be described with reference to FIGS.

[0011] The laser marking device 1 (see FIG. 1) includes a laser 57, a lens 58, and a holder 59 (see FIGS. 3 and 4).

[0012] The laser 57 emits a laser beam (laser beam Ls2).

[0013] The lens 58 receives the laser light (laser light Ls2) emitted from the laser 57 and emits laser light (laser light L1). The laser light (laser light L1) emitted by the lens 58 is obtained by condensing the laser light (laser light Ls2) emitted from the laser 57.

[0014] The holder 59 holds the laser 57 and the lens 58 therein.

[0015] The holder 59 is provided with a recess 593 recessed along a second direction intersecting with a first direction in which the laser 57 and the lens 58 are aligned inside the holder 59.

[0016] At least a portion of the recess 593 is located between the laser 57 and the lens 58 in the first direction.

[0017] According to the above configuration, by pressing the holding portion 59 or the like, the holding portion 59 can be easily deformed with the recess 593 as a fulcrum. As a result, when the emission direction of the laser light L1 is slightly deviated from the appropriate direction, the emission direction of the laser light L1 can be adjusted by deforming the holding portion 59.

[0018] (2)Details The laser marking device 1 according to this embodiment will be described in detail with reference to the drawings.

[0019] As shown in Figures 1 and 2, the laser level 1 has multiple (e.g., three) legs 3, and is installed and used on an installation surface G1 such as the ground or floor of a work site (e.g., a housing construction site or an electrical work site) with the multiple legs 3 spread apart.

[0020] In the following description, the upward direction of the laser marking device 1 when it is installed on a horizontal installation surface G1 is defined as the upward direction of the laser marking device 1. Furthermore, when the laser marking device 1 is installed on a horizontal installation surface G1, the normal direction of the third transparent window 403 (described later) is defined as the forward direction of the laser marking device 1. The upward, downward, frontward, backward, leftward, and rightward directions of the laser marking device 1 are defined based on these upward and forward directions. Note that the orientation in which the laser marking device 1 is installed is not limited to the above-mentioned orientations. Furthermore, the arrows indicating the various directions in the drawings are merely shown for the purpose of explanation and do not have any substance.

[0021] (2.1) Overall configuration of the laser level As shown in Figures 1 and 2, the laser marking device 1 emits to the outside a dot-shaped laser light L1 emitted downward, a dot-shaped laser light L2 emitted upward, a linear laser light L3 emitted forward, and a linear laser light L4 emitted upward.

[0022] The laser beam L1 is used as a reference point for determining the installation position of the laser marking device 1 at the work site. The laser beams L2, L3, and L4 are used as reference points and reference lines to be marked on the walls and ceiling surfaces at the work site.

[0023] The laser marking device 1 includes a laser device 2 and multiple (three) legs 3. The laser device 2 is a part for emitting laser beams L1 to L4. The multiple legs 3 are parts for supporting the laser device 2 on an installation surface G1.

[0024] (2.2) Laser equipment As shown in FIGS. 1 to 5, the laser device 2 includes a housing 4, a laser emission unit 5, and a support member 6.

[0025] The housing 4 includes a body 41 and a base 42 .

[0026] The body 41 houses the laser emission unit 5 and the support member 6. The body 41 is formed, for example, from a light-blocking resin. The body 41 has, for example, a substantially cylindrical shape, and includes a peripheral wall 411, an upper wall 412, and a bottom 413, as shown in Fig. 3. Fig. 3 is a cross-sectional view of the laser marking device 1 with the three legs 3 removed.

[0027] The peripheral wall 411 is tubular (for example, cylindrical). The upper wall 412 is provided on the peripheral wall 411 so as to close an upper opening of the peripheral wall 411, and is, for example, plate-shaped (for example, disk-shaped). The bottom 413 is provided on the peripheral wall 411 so as to close a lower opening of the peripheral wall 411, and is, for example, plate-shaped (here, disk-shaped). The outer diameter of the lower part of the body 41 is smaller than the outer diameter of the upper part of the body 411. A circular through-hole 414 through which the laser light L1 passes in the vertical direction is provided in the center of the bottom 413, as shown in FIG. 3 .

[0028] The body 41 has three transmission windows (second transmission window 402 to fourth transmission window 404) (see FIGS. 1 to 3). The second transmission window 402 is a transmission window through which the laser light L2 is emitted. The second transmission window 402 is, for example, a substantially circular transmission window, and is provided in the center of an upper wall portion 412 of the body 41. The third transmission window 403 is a transmission window through which the laser light L3 is emitted. The third transmission window 403 is, for example, a horizontally elongated rectangular transmission window, and is provided in a peripheral wall portion 411 of the body 41. The fourth transmission window 404 is a transmission window through which the laser light L4 is emitted. The fourth transmission window 404 is, for example, a vertically elongated rectangular transmission window, and is provided across the upper wall portion 412 and the peripheral wall portion 411 of the body 41. The second transmission window 402 to fourth transmission window 404 are, for example, formed of a transparent member (resin or glass).

[0029] The base 42 is tubular (for example, cylindrical) with an open upper end and a bottom 421. The base 42 is fixed to the lower part of the body 41. As shown in FIG. 1, a plurality of legs 3 are rotatably connected to the base 42.

[0030] The base 42 is formed of, for example, a light-shielding resin. The base 42 has a first transmission window 401 (see FIG. 3). The first transmission window 401 is a transmission window through which the laser light L1 is emitted. The first transmission window 401 is, for example, a substantially circular transmission window, and is provided in the center of the bottom 421.

[0031] The base 42 is fixed to the body 41 by inserting the lower part of the body 41 into the upper opening of the base 42 and fixing it thereto.

[0032] As shown in FIG. 3 , the support member 6 is fixed to the inner circumferential surface of the body 41 and rotatably supports a pair of first shafts 551 of the vertical support unit 55 (described later). The support member 6 has an annular portion having a central opening that penetrates vertically, and a pair of bearings 61. The annular portion is fixed to the inner circumferential surface of the body 41. The pair of bearings 61 are components that rotatably support the pair of first shafts 551 of the laser emission unit 5 and are fixed to the annular portion. With the laser emission unit 5 inserted into the central opening of the annular portion and hanging down so as to be able to swing, the pair of first shafts 551 of the laser emission unit 5 are rotatably supported by the pair of bearings 61. In this way, the support member 6 supports the laser emission unit 5 so that it can swing around the first shafts 551.

[0033] The laser emission unit 5 is a part that generates and emits laser beams L1 to L4. As shown in FIGS. 3, 5, and 6, the laser emission unit 5 includes a laser (first laser) 52, a holder (first holder) 54, an optical system 53, a laser (second laser) 57, a lens (third emission lens) 58, a substrate 56, a holder (second holder) 59, a vertical support 55, a main body 51, and a bottom 60. The laser emission unit 5 further includes a plurality of (for example, four) screws Sc1 to Sc4 that are screwed into the main body 51. It is not essential that the laser emission unit 5 include all of the screws Sc1 to Sc4; it is sufficient that the laser emission unit 5 includes at least one of the screws Sc1 to Sc4.

[0034] The first laser 52 is, for example, a laser diode (LD) module. The first laser 52 emits upward a laser beam Ls1 (see FIG. 6) that is the source of the laser beams L2 to L4. The laser beam Ls1 emitted from the first laser 52 enters an optical system 53. As shown in FIGS. 3, 5, and 6, the first laser 52 is mounted (placed) on the upper surface of a substrate 56.

[0035] The first holding part 54 positions and holds the first laser 52 below the optical system 53 (more specifically, below the vertical support part 55).

[0036] The optical system 53 is disposed above the first laser 52 (more specifically, above the vertical support part 55). As shown in FIG. 6, the optical system 53 generates laser beams L2 to L4 from the laser beam Ls1 emitted from the first laser 52.

[0037] As shown in FIGS. 5 and 6 , the optical system 53 has a first beam splitter 531, a second beam splitter 532, a first output lens 533, and a second output lens 534. The first beam splitter 531 transmits a portion of the laser light Ls1 from the first laser 52 to cause it to enter the second beam splitter 532, and reflects the remaining portion to cause it to enter the first output lens 533. The first output lens 533 converts the laser light Ls1 from the first beam splitter 531 into linear laser light L3 and emits it forward. The second beam splitter 532 transmits a portion of the laser light Ls1 from the first beam splitter 531 to emit it upward as dot-like laser light L2, and reflects the remaining portion to cause it to enter the second output lens 534. The second output lens 534 converts the laser light Ls1 from the second beam splitter 532 into a linear laser light L4 and outputs it upward.

[0038] The second laser 57 is, for example, an LD module. As shown in FIGS. 3 to 6, the second laser 57 is mounted (disposed) on the lower surface of the substrate 56. The second laser 57 emits downward laser light Ls2 (see FIG. 6), which is the source of the laser light L1. The laser light Ls2 emitted from the second laser 57 is incident on a third emission lens 58 disposed below the second laser 57.

[0039] 4, the second laser 57 has a cylindrical columnar portion 571. An LD chip is built into the lower end surface of the columnar portion 571, and an emission portion having an emission port from which the laser light Ls2 is emitted is provided. In addition, a plurality of terminals for supplying power to the LD chip protrude upward from the upper end surface of the columnar portion 571.

[0040] The laser light Ls2 is incident on the third output lens 58. The third output lens 58 collects and emits the laser light Ls2. More specifically, the third output lens 58 collects and emits the laser light Ls2 downward as a point-like laser light L1.

[0041] Here, the comparative laser marking device uses point light L5 (see FIG. 7) emitted from an LED (Light Emitting Diode) module as a light source as a reference point for determining the installation position of the laser marking device at the work site. However, point light L5 emitted from an LED module as a light source has a lower linearity than laser light and tends to have a wider irradiation range. On the other hand, the laser light L1 emitted from the second laser 57 as a light source in this embodiment has a narrower irradiation range than point light L5, as shown in FIG. 8, and is more visible.

[0042] As shown in FIG. 4, the second holding unit 59 holds the second laser 57 and the third emission lens 58 therein at a distance from each other so that the second laser 57 and the third emission lens 58 are aligned along the first direction (vertical direction).

[0043] The structure of the second holding portion 59 will be described in more detail below.

[0044] 4, the second holding portion 59 has a first cylindrical portion 591 and a second cylindrical portion 592. The first cylindrical portion 591 and the second cylindrical portion 592 are arranged so that the centers of their cylindrical shapes coincide when viewed from a first direction. The first cylindrical portion 591 is arranged above the second cylindrical portion 592.

[0045] 4, the second holding portion 59 is provided with recesses 593 that are recessed along the radial direction (hereinafter simply referred to as the radial direction) of the first cylindrical portion 591 and the second cylindrical portion 592 all around the circumferential direction. That is, the recesses 593 are provided on the outer circumferential surface of the second holding portion 59. More specifically, the recesses 593 are recessed along the radial direction toward the central axes of the first cylindrical portion 591 and the second cylindrical portion 592.

[0046] The radial direction is a direction perpendicular to the first direction. In this embodiment, the recessed portion 593 is recessed in all directions included in the radial direction. Therefore, for example, when viewed from the front-rear direction, the direction in which the recessed portion 593 is recessed (second direction) is the left-right direction. When viewed from the left-right direction, the direction in which the recessed portion 593 is recessed (second direction) is the front-rear direction.

[0047] The recess 593 is provided at a position between the first cylindrical portion 591 and the second cylindrical portion 592 in the first direction.

[0048] Here, thickness t3 of recess 593 in the second direction is thinner than the thickness of a portion of second holding portion 59 that is different from recess 593. Specifically, as shown in Fig. 4, thickness t3 of recess 593 in the second direction is thinner than thickness t1 of a portion of first cylindrical portion 591 that is adjacent to recess 593 in the up-down direction. Thickness t3 is also thinner than thickness t2 of a portion of second cylindrical portion 592 that is adjacent to recess 593 in the up-down direction.

[0049] 4, the second holding portion 59 further has an opposing portion 594. In this embodiment, the opposing portion 594 is disk-shaped and closes the opening at the lower end of the second cylindrical portion 592. Here, the outer diameter ED4 of the opposing portion 594 is formed to be larger than the outer diameter ED2 of the second cylindrical portion 592, for example.

[0050] The facing portion 594 is located on the opposite side of the second laser 57 from the third output lens 58 when the second holder 59 holds the second laser 57 and the third output lens 58. The facing portion 594 faces the third output lens 58 in the first direction. That is, the laser light L1 emitted from the third output lens 58 is incident on the facing portion 594. Here, the facing portion 594 is provided with a through-hole H0 that penetrates the facing portion 594 in the first direction. As a result, the laser light L1 that has entered the facing portion 594 is emitted from the through-hole H0 to the outside (external space ES). The laser light L1 is attenuated to an appropriate illuminance by passing through the through-hole H0 and being emitted to the external space ES.

[0051] The through hole H0 has a first hole H1 and a second hole H2 extending downward from the lower end of the first hole H1.

[0052] The first hole H1 has a constant inner diameter in the first direction. The first hole H1 is a so-called aperture stop that reduces the intensity of the laser light L1 emitted into the external space ES. The first hole H1 is formed, for example, to have a circular shape when viewed from the first direction. The inner diameter of the first hole H1 may be set appropriately depending on the desired emission intensity of the laser light L1.

[0053] The laser light L1 attenuated by the first hole H1 is emitted into the external space ES through the second hole H2. Here, the second hole H2 has a tapered shape with an inner diameter that increases downward. This makes it possible to suppress attenuation of the laser light L1 by the second hole H2. If the second hole H2 is not provided, that is, if the through-hole H0 functions only as the first hole H1, increasing the thickness of the facing portion 594 in the first direction to ensure the strength of the facing portion 594 would result in the length of the first hole H1 in the first direction being correspondingly longer. In this case, reflection of the laser light L1 within the first hole H1 could cause problems such as excessive attenuation of the laser light L1. However, providing the second hole H2 can reduce the likelihood of such problems occurring.

[0054] The first cylindrical portion 591, the second cylindrical portion 592, the recessed portion 593, and the opposing portion 594 are integrally formed from a plastic material such as a metal material. That is, the second holding portion 59 is formed from a metal material. However, the second holding portion 59 may also be formed from a plastic synthetic resin material or the like.

[0055] The first cylindrical portion 591 holds the second laser 57 therein. More specifically, as shown in FIG. 4, the first cylindrical portion 591 holds the columnar portion 571 of the second laser 57 therein. The first cylindrical portion 591 is formed so that an inner diameter ID1 is smaller than an outer diameter ED3 of the columnar portion 571. When the columnar portion 571 is press-fitted into the first cylindrical portion 591 from above, the inner diameter ID1 of the first cylindrical portion 591 expands, and the first cylindrical portion 591 holds the columnar portion 571. Furthermore, when the columnar portion 571 is press-fitted into the first cylindrical portion 591, the inner circumferential surface S1 of the first cylindrical portion 591 and the outer circumferential surface S2 of the columnar portion 571 come into contact with each other. This allows the first cylindrical portion 591 to firmly hold the second laser 57.

[0056] Here, by pressing the columnar portion 571 into the first cylindrical portion 591 while checking the size of the laser light L1 projected onto the projection surface, the columnar portion 571 can be pressed in to the position where the focus of the laser light L1 is optimal.

[0057] The second cylindrical portion 592 holds the third output lens 58 therein.

[0058] Here, at least a portion of recess 593 is located in the first direction (vertical direction) between second laser 57 held by first cylindrical portion 591 and third output lens 58 held by second cylindrical portion 592. In addition, the end (lower end) of recess 593 on the third output lens 58 side is located between second laser 57 and third output lens 58 in the first direction.

[0059] In this embodiment, the entire recess 593 is located between the second laser 57 and the third output lens 58 in the first direction. That is, the end (upper end) of the recess 593 on the second laser 57 side and the lower end of the recess 593 are located between the second laser 57 and the third output lens 58 in the first direction. Note that the upper end of the recess 593 may be provided so as to overlap with the second laser 57 in the up-down direction.

[0060] As shown in FIG. 3, the vertical support portion 55 is disposed between the first holding portion 54 and the optical system 53, for example.

[0061] As shown in FIGS. 5 and 6, the vertical support portion 55 has a rectangular parallelepiped base portion 553, a pair of first shaft portions 551, and a pair of second shaft portions 552.

[0062] The base 553 has, for example, a substantially rectangular parallelepiped shape and has a through-hole 554 that allows the laser light Ls1 from the first laser 52 to pass therethrough in the vertical direction.

[0063] The pair of first shafts 551 protrude in the front-rear direction from both front and rear side surfaces of the base 553. The pair of first shafts 551 protrude to the outside of the main body 51 from a pair of openings 511 (see FIG. 5) of the main body 51, and are supported so as to be swingable by a pair of bearings 61 of the support member 6 (see FIG. 3). In other words, the laser emission unit 5 (main body 51) can be swingable around an axis in the front-rear direction by the pair of first shafts 551 supported so as to be swingable by the pair of bearings 61.

[0064] The pair of second shafts 552 protrude in the left-right direction from both the left and right side surfaces of the base 553, and are rotatably supported by a pair of bearings 512 (see FIG. 5) of the main body 51. In other words, the laser emission unit 5 (main body 51) can swing about an axis in the left-right direction by the pair of second shafts 552 that are swingably supported by the pair of bearings 512.

[0065] The axial direction (front-rear direction) of the first shaft portion 551 and the axial direction (left-right direction) of the second shaft portion 552 are perpendicular to each other.

[0066] 3, the main body 51 houses a first laser 52, a first holder 54, an optical system 53, a second laser 57, a third output lens 58, a substrate 56, a second holder 59, and a vertical support 55. The bottom 60 is attached to the lower end of the main body 51.

[0067] The structure of the main body 51 and the bottom 60 will be described in more detail below.

[0068] The main body 51 has, for example, a long rod shape with an inclined upper surface. The main body 51 is made of a metal including, for example, iron, aluminum, zinc, etc. The main body 51 has an upper main body portion 51U and a lower main body portion 51D.

[0069] The upper body portion 51U accommodates, from above, an optical system 53, a vertical support portion 55, a first holder 54 that holds the first laser 52, and a substrate 56 in this order.

[0070] As shown in FIG. 5, the upper body portion 51U has three windows (a first window portion 513, a second window portion 514, and a third window portion 515). The first window portion 513, the second window portion 514, and the third window portion 515 are each openings formed in the upper body portion 51U. The first window portion 513 is a window portion through which the laser light L1 is emitted, and is provided on the inclined upper surface of the upper body portion 51U. The second window portion 514 is a window portion through which the laser light L2 is emitted, and is provided on a side surface of the upper body portion 51U. The third window portion 515 is a window portion through which the laser light L3 is emitted, and is provided on a side surface of the upper body portion 51U.

[0071] The lower main body portion 51D holds a second holder 59 that holds a second laser 57 and a third output lens 58. More specifically, as shown in FIG. 4, the lower main body portion 51D has an internal space IS that houses the second holder 59 and an opening 516 that connects the internal space IS to an external space ES. The internal space IS is, for example, a substantially cylindrical space that extends in the first direction. The opening 516 is provided at the bottom end of the lower main body portion 51D.

[0072] The second holding portion 59 is inserted into the internal space IS through the opening 516 with the first cylindrical portion 591 facing upward. The inner diameter ID2 of the internal space IS is formed slightly larger than the outer diameter ED2 of the second cylindrical portion 592. The inner diameter ID2 is also formed smaller than the outer diameter ED4 of the facing portion 594. Furthermore, the inner diameter ID3 of the lower end of the internal space IS is formed slightly larger than the outer diameter ED4 of the facing portion 594. As a result, when the second holding portion 59 is inserted into the internal space IS through the opening 516, the facing portion 594 abuts against the lower end of the main body lower portion 51D, and the second holding portion 59 can be positioned relative to the main body lower portion 51D.

[0073] Further, second holding portion 59 is formed so that outer diameter ED1 of first cylindrical portion 591 is smaller than outer diameter ED2 of second cylindrical portion 592. This improves the workability of inserting second holding portion 59 into internal space IS from opening 516.

[0074] Here, main body lower part 51D has third cylindrical part 517 which is substantially cylindrical, and fourth cylindrical part 518 which is substantially cylindrical and is provided below third cylindrical part 517. In other words, the internal space of third cylindrical part 517 and the internal space of fourth cylindrical part 518 which are continuous with each other form internal space IS. Here, second holding part 59 is housed in internal space IS such that the position of first cylindrical part 591 overlaps the position of third cylindrical part 517 of main body lower part 51D in the first direction (vertical direction).

[0075] 4 and 9, the third cylindrical portion 517 is provided with two screw holes TH1 and TH2 that penetrate the third cylindrical portion 517 in the front-rear direction, and two screw holes TH3 and TH4 that penetrate the third cylindrical portion 517 in the left-right direction. The four screw holes TH1 to TH4 connect the internal space IS and the external space ES.

[0076] Four screws Sc1 to Sc4 are screwed into the four screw holes TH1 to TH4, respectively. Here, as described above, the main body 51 can swing around the front-rear direction as an axis. As a result, by adjusting the screw-in amounts of the screws Sc3 and Sc4 in the left-right direction of the screw holes TH3 and TH4, respectively, the main body 51 swings around the front-rear direction (third direction when viewed from the front-rear direction), which is perpendicular to the up-down direction (first direction) and the left-right direction (second direction when viewed from the front-rear direction). Also, as described above, the main body 51 can swing around the left-right direction as an axis. As a result, by adjusting the screw-in amounts of the screws Sc1 and Sc2 in the front-rear direction of the screw holes TH1 and TH2, respectively, the main body 51 swings around the left-right direction (third direction when viewed from the left-right direction), which is perpendicular to the up-down direction (first direction) and the front-rear direction (second direction when viewed from the left-right direction). In other words, the inclination of the main body 51 with respect to the first direction can be adjusted by adjusting the screw-in amounts of the screws Sc1 to Sc4 in the screw holes TH1 to TH4, respectively.

[0077] As described above, the second retaining portion 59 is housed in the internal space IS such that the position of the first cylindrical portion 591 overlaps the position of the third cylindrical portion 517 in the first direction. Therefore, when the screws Sc1 to Sc4 are screwed into the screw holes TH1 to TH4 from the external space ES, the tips of the screws Sc1 to Sc4 press the first cylindrical portion 591 housed in the internal space IS in the second direction. Note that the tip of the screw Sc1 is the rear end of the screw Sc1 in FIG. 9, the tip of the screw Sc2 is the rear end of the screw Sc2, the tip of the screw Sc3 is the right end of the screw Sc3, and the tip of the screw Sc4 is the left end of the screw Sc3.

[0078] More specifically, when screw Sc1 is threaded into threaded hole TH1, the tip of screw Sc1 presses first cylindrical portion 591 rearward. Similarly, when screw Sc2 is threaded into threaded hole TH2, the tip of screw Sc2 presses first cylindrical portion 591 forward. When screw Sc3 is threaded into threaded hole TH3, the tip of screw Sc3 presses first cylindrical portion 591 rightward. When screw Sc4 is threaded into threaded hole TH4, the tip of screw Sc4 presses first cylindrical portion 591 leftward.

[0079] 4 and 9, the outer peripheral surface of the first cylindrical portion 591 is provided with two flat surfaces F1 and F2 whose normal direction is the front-rear direction, and two flat surfaces F3 and F4 whose normal direction is the left-right direction. The flat surfaces F1 to F4 are provided at positions corresponding to the screw holes TH1 to TH4, respectively. That is, the tips of the screws Sc1 to Sc4 that are screwed into the screw holes TH1 to TH4 come into contact with the flat surfaces F1 to F4, respectively. This allows the pressing force to be efficiently transmitted to the second holding portion 59 from the tips of the screws Sc1 to Sc4 that are screwed into the screw holes TH1 to TH4.

[0080] The second retaining portion 59 is pressed in the second direction by the tips of the screws Sc1 to Sc4, causing it to plastically deform with the recess 593 as a fulcrum. In this embodiment, the flat portion F1 is pressed rearward by the tip of the screw Sc1, causing the second retaining portion 59 to plastically deform with the recess 593 as a fulcrum, because the recess 593 is thinner and more easily deformed than other portions of the second retaining portion 59. More specifically, the flat portion F1 is pressed rearward by the tip of the screw Sc1, causing the position of the first cylindrical portion 591 relative to the second cylindrical portion 592 to move rearward. Similarly, the flat portion F2 is pressed forward by the tip of the screw Sc2, causing the position of the first cylindrical portion 591 relative to the second cylindrical portion 592 to move forward. The flat portion F3 is pressed rightward by the tip of the screw Sc3, causing the position of the first cylindrical portion 591 relative to the second cylindrical portion 592 to move rightward. When the flat portion F4 is pressed leftward by the tip of the screw Sc4, the position of the first cylindrical portion 591 relative to the second cylindrical portion 592 moves leftward. That is, the position of the first cylindrical portion 591 holding the second laser 57 relative to the second cylindrical portion 592 can be adjusted by screwing the screws Sc1 to Sc4 into the screw holes TH1 to TH4, respectively. Here, consider a case where the emission direction of the laser beam L1 emitted from the third emission lens 58 is slightly deviated from the appropriate direction (e.g., vertically downward) due to reasons such as the optical axis of the laser beam Ls2 emitted from the second laser 57 not matching the optical axis of the third emission lens 58. In such a case, by screwing the screws Sc1 to Sc4 into the screw holes TH1 to TH4, respectively, and adjusting the position of the first cylindrical portion 591 holding the second laser 57, the optical axis of the laser beam Ls2 can be aligned with the optical axis of the third emission lens 58, and the emission direction of the laser beam L1 can be adjusted to the appropriate direction.

[0081] As described above, the end (lower end) of the recess 593 on the third output lens 58 side is located between the second laser 57 and the third output lens 58 in the first direction. In other words, the portion of the second holding part 59 that undergoes plastic deformation with the recess 593 as a fulcrum is located above the third output lens 58. This makes it difficult for force to be applied to the third output lens 58 when the second holding part 59 plastically deforms, thereby reducing the possibility of deformation, damage, etc. of the third output lens 58.

[0082] The fourth cylindrical portion 518 has a thread groove on its outer circumferential surface.

[0083] The bottom portion 60 has a substantially cylindrical shape. As shown in Fig. 4, the bottom portion 60 has a first bottom portion 601 and a second bottom portion 602 provided below the first bottom portion 601. A thread groove is provided on the inner peripheral surface of the first bottom portion 601. The inner diameter of at least a portion of the second bottom portion 602 increases downward.

[0084] The bottom portion 60 is attached to the lower end of the lower main body portion 51D with the second holding portion 59 accommodated in the internal space IS. Specifically, the bottom portion 60 is attached to the lower end of the lower main body portion 51D by screwing a thread groove provided on the inner peripheral surface of the first bottom portion 601 into a thread groove provided on the outer peripheral surface of the fourth cylindrical portion 518 of the lower main body portion 51D.

[0085] Here, the inner diameter ID4 of the upper end of the second bottom portion 602 is smaller than the outer diameter ED4 of the opposing portion 594 that abuts against the lower end of the main body lower portion 51D (fourth cylindrical portion 518). This allows the second bottom portion 602 to restrict movement of the second holding portion 59 from the internal space IS to the external space ES via the opening 516 provided at the lower end of the main body lower portion 51D.

[0086] Furthermore, the inner diameter ID4 of the upper end of the second bottom portion 602 is larger than the inner diameter of the second hole H2 of the through-hole H0 provided in the facing portion 594. This makes it possible to prevent the laser light L1 emitted into the external space ES through the second hole H2 from being blocked by the second bottom portion 602.

[0087] (2.3) Multiple legs 1 and 2, the multiple (e.g., three) legs 3 are members for supporting the laser device 2 on the installation surface G1. The multiple legs 3 are made up of multiple divided bodies obtained by dividing a tubular body (e.g., a cylindrical body) into multiple parts (the same number as the number of legs 3) in the circumferential direction.

[0088] 1, each of the multiple legs 3 has a leg body 31 and a connecting protrusion 32. The leg body 31 has substantially the same shape as one of multiple divided bodies obtained by equally dividing a tubular body (e.g., a cylindrical body) into multiple parts (the same number as the number of legs 3) in the circumferential direction. The connecting protrusion 32 protrudes upward from the center of the upper surface of the leg body 31.

[0089] The multiple legs 3 are rotatably connected to the peripheral edge of the bottom of the base 42. Each of the multiple legs 3 is rotatable around its first end (upper end) between a direction along the center line M1 of the base 42 and a direction along an inclined line M2. The center line M1 is an imaginary line that passes through the center of the base 42. The inclined line M2 is an imaginary line that is inclined toward the outer periphery of the base 42 with respect to the center line M1 of the base 42.

[0090] 1 and 3, a plurality of (e.g., three) connecting recesses 423 are provided on the periphery of the bottom of the base 42, corresponding one-to-one with the plurality of (e.g., three) leg portions 3. The connecting protrusions 32 of the corresponding leg portions 3 are disposed in each of the plurality of connecting recesses 423. A rotation shaft 424 (see FIG. 3) is disposed inside the connecting recess 423. The connecting protrusions 32 of the leg portions 3 are rotatably coupled to the rotation shaft 424. As a result, each of the plurality of legs 3 is coupled to the base 42 in a state in which it can rotate around the connecting protrusion 32 between the direction along the center line M1 and the direction along the inclined line M2.

[0091] One of the plurality of legs 3 is a powered leg 300. The powered leg 300 houses a power source (for example, a dry cell) for emitting and controlling the first laser 52 and the second laser 57.

[0092] (3) Variations The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the embodiment are listed below. The above embodiment and the modifications described below can be applied in appropriate combination.

[0093] Modifications of the above embodiment are listed below. In the modifications described below, components common to the above embodiment are given the same reference numerals, and descriptions thereof will be omitted.

[0094] In the above embodiment, recess 593 is recessed in both directions (second directions) included in the radial directions of first cylindrical portion 591 and second cylindrical portion 592, but the second direction in which recess 593 is recessed is not limited to this. For example, recess 593 may be recessed only along the front-rear direction or only along the left-right direction. Furthermore, recess 593 may be recessed only along the front-rear direction and the left-right direction.

[0095] In the above embodiment, the recesses 593 are recessed along the radial direction of the first cylindrical portion 591 and the second cylindrical portion 592 toward the central axes of the first cylindrical portion 591 and the second cylindrical portion 592, but the recesses 593 may be recessed along the radial direction toward the outside from the central axes of the first cylindrical portion 591 and the second cylindrical portion 592. In this case, the recesses 593 are provided on the inner circumferential surface of the second holding portion 59, for example.

[0096] (4) Summary As described above, the laser marker (1) of the first aspect includes a laser (57) that emits laser light (Ls2), a lens (58) that receives the laser light (Ls2) and emits laser light (L1), and a holder (59) that holds the laser (57) and the lens (58) therein. The holder (59) is provided with a recess (593) that is recessed along a second direction that intersects with a first direction in which the laser (57) and the lens (58) are aligned within the holder (59). At least a portion of the recess (593) is located between the laser (57) and the lens (58) in the first direction.

[0097] According to this embodiment, the holding portion (59) can be easily deformed around the recess (593) by, for example, pressing the holding portion (59). As a result, when the emission direction of the laser light (L1) is slightly deviated from the appropriate direction, the emission direction of the laser light (L1) can be adjusted by deforming the holding portion (59).

[0098] In the laser marking device (1) of the second embodiment, in the first embodiment, the end of the recess (593) on the lens (58) side is located between the laser (57) and the lens (58) in the first direction.

[0099] According to this embodiment, when the holding portion (59) deforms using the recess (593) as a fulcrum, force is less likely to be applied to the output lens (58), thereby reducing the possibility of deformation, damage, etc. occurring to the lens (58).

[0100] In the laser marking device (1) of the third aspect, in the first or second aspect, the thickness of the recess (593) in the second direction is thinner than the thickness of the portion of the holding portion (59) different from the recess (593).

[0101] According to this embodiment, the holding portion (59) can be more easily deformed with the recess (593) as a fulcrum.

[0102] In the laser marking device (1) of the fourth aspect, in any one of the first to third aspects, the holding portion (59) has a first cylindrical portion (591) having a cylindrical shape and a second cylindrical portion (592) also having a cylindrical shape. The first cylindrical portion (591) holds the laser (57) therein. The second cylindrical portion (592) holds the lens (58) therein. The outer diameter (ED1) of the first cylindrical portion (591) is smaller than the outer diameter (ED2) of the second cylindrical portion (592).

[0103] According to this embodiment, the workability of inserting the second holding portion (59) into the internal space (IS) of the main body (51) can be improved.

[0104] The laser marker (1) of the fifth aspect is the same as any of the first to fourth aspects, and further includes a main body (51) and a bottom (60). The main body (51) has an internal space (IS) that houses the holder (59), and an opening (516) that connects the internal space (IS) to the external space (ES). The bottom (60) is attached to the main body (51) when the holder (59) is housed in the internal space (IS), and limits movement of the holder (59) from the internal space (IS) to the external space (ES) via the opening (516).

[0105] According to this embodiment, the stability of the holding portion (59) when housed in the main body (51) can be improved.

[0106] In the laser marking device (1) of the sixth aspect, in any one of the first to fifth aspects, the laser (57) has a cylindrical columnar portion (571). The holding portion (59) has a cylindrical portion (591) that is cylindrical. The cylindrical portion (591) holds the cylindrical portion (571) therein. The inner diameter (ID1) of the cylindrical portion (591) is smaller than the outer diameter (ED3) of the cylindrical portion (571). The inner peripheral surface (S1) of the cylindrical portion (591) and the outer peripheral surface (S2) of the cylindrical portion (571) are in contact with each other.

[0107] According to this embodiment, the cylindrical portion (591) can firmly hold the laser (57).

[0108] In the laser marker (1) of the seventh aspect, in any one of the first to sixth aspects, the holder (59) has a facing portion (594). The facing portion (594) is located on the opposite side of the laser (57) from the lens (58) when the holder (59) holds the laser (57) and the lens (58). The facing portion (594) faces the lens (58) in the first direction. The facing portion (594) is provided with a through-hole (H0) that passes through the facing portion (594) in the first direction.

[0109] According to this aspect, it is possible to attenuate the laser light (L1) emitted into the external space (ES) through the through hole (H0).

[0110] The laser marker (1) of an eighth aspect is any of the first to seventh aspects, and further includes a main body (51) having an internal space (IS) that houses a holding part (59), and screws (Sc1 to Sc4). The main body (51) is provided with screw holes (TH1 to TH4) that penetrate the main body (51) in the second direction and connect the internal space (IS) to the external space (ES). When the screws (Sc1 to Sc4) are screwed from the external space (ES) into the screw holes (TH1 to TH4), the tips of the screws (Sc1 to Sc4) press the holding part (59) housed in the internal space (IS) in the second direction.

[0111] According to this embodiment, the holding portion (59) can be deformed by screwing the screws (Sc1 to Sc4) into the screw holes (TH1 to TH4).

[0112] In the laser marking device (1) of the ninth aspect, in the eighth aspect, the holding portion (59) is pressed in the second direction by the tips of the screws (Sc1 to Sc4), and is thereby plastically deformed with the recess (593) as a fulcrum.

[0113] According to this aspect, the holding portion (59) is plastically deformed with the recess (593) as a fulcrum, thereby making it possible to adjust the emission direction of the laser light (L1).

[0114] In the laser marking device (1) of the tenth aspect, in the eighth or ninth aspect, the holding portion (59) is provided with flat portions (F1 to F4) that come into contact with the tips of the screws (Sc1 to Sc4).

[0115] According to this aspect, the pressing force can be efficiently transmitted to the holding portion (59) from the tip of the screw (Sc1 to Sc4) screwed into the screw hole (TH1 to TH4).

[0116] In the laser marking device (1) of the eleventh aspect, in the first to tenth aspects, the holding portion (59) is made of a metal material.

[0117] According to this embodiment, the strength of the holding portion (59) can be maintained.

[0118] In the laser marking device (1) of the twelfth aspect, in the eighth aspect, the main body (51) is swingable about an axis in a third direction that intersects with the first direction and the second direction.

[0119] According to this embodiment, the inclination of the main body (51) with respect to the first direction can be adjusted by the amount of screwing of the screws (Sc1 to Sc4) into the screw holes (TH1 to TH4).

[0120] The second to twelfth aspects are not essential components of the laser marking device (1) and can be omitted as appropriate. [Explanation of symbols]

[0121] 1 Laser level 51 Main Unit 57 Laser 58 Lens 59 Holding part 60 bottom 516 Aperture 571 Cylinder 591 First cylindrical section 592 Second cylindrical section 593 Recess 594 Opposite part ED1 Outer diameter ED2 outer diameter ED3 outer diameter ES external space F1 flat part F2 flat part F3 flat part F4 flat part H0 through hole ID1 Inner diameter IS interior space Ls2 laser light S1 Inner surface S2 outer surface Sc1 screw Sc2 screw Sc3 screw Sc4 screw TH1 screw hole TH2 screw hole TH3 screw hole TH4 screw hole

Claims

1. a laser that emits laser light; a lens that receives the laser light and emits the laser light; a holder that holds the laser and the lens therein, the holding portion is provided with a recess that is recessed along a second direction that intersects with a first direction in which the laser and the lens are aligned within the holding portion, At least a portion of the recess is located between the laser and the lens in the first direction. Laser level.

2. an end of the recess on the lens side is located between the laser and the lens in the first direction; 2. The laser marker according to claim 1.

3. a thickness of the recess in the second direction is smaller than a thickness of a portion of the holding portion different from the recess; 3. The laser marking device according to claim 1 or 2.

4. The holding portion has a first cylindrical portion and a second cylindrical portion, the first cylindrical portion holds the laser therein; the second cylindrical portion holds the lens therein; The outer diameter of the first cylindrical portion is smaller than the outer diameter of the second cylindrical portion.

3. The laser marking device according to claim 1 or 2.

5. a main body having an internal space for accommodating the holding portion and an opening connecting the internal space with an external space; a bottom portion attached to the main body when the holding portion is housed in the internal space, and restricting movement of the holding portion from the internal space to the external space through the opening, 3. The laser marking device according to claim 1 or 2.

6. The laser has a cylindrical portion having a cylindrical shape, The holding portion has a cylindrical portion having a cylindrical shape, the cylindrical portion holds the columnar portion therein; The inner diameter of the cylindrical portion is smaller than the outer diameter of the columnar portion, The inner circumferential surface of the cylindrical portion and the outer circumferential surface of the columnar portion are in contact with each other.

3. The laser marking device according to claim 1 or 2.

7. The holding portion has an opposing portion, The facing portion is the holding portion is located on the opposite side of the lens from the laser when the holding portion holds the laser and the lens, facing the lens in the first direction, The facing portion is provided with a through hole that penetrates the facing portion in the first direction.

3. The laser marking device according to claim 1 or 2.

8. a main body having an internal space for accommodating the holding portion; a screw; The main body is provided with a screw hole that penetrates the main body in the second direction and connects the internal space and the external space, When the screw is screwed into the screw hole from the external space, the tip of the screw presses the holding portion housed in the internal space in the second direction.

3. The laser marking device according to claim 1 or 2.

9. the retaining portion is pressed in the second direction by the tip of the screw, and is plastically deformed with the recess as a fulcrum. The laser marker according to claim 8.

10. The holding portion is provided with a flat surface with which the tip of the screw comes into contact. The laser marker according to claim 8.

11. The holding portion is formed of a metal material.

3. The laser marking device according to claim 1 or 2.

12. The main body is swingable about an axis in a third direction intersecting the first direction and the second direction. The laser marker according to claim 8.

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