JP5209567B2 - Laser light source device - Google Patents

Description

  The present invention relates to a laser light source device, and more particularly to a laser light source device capable of adjusting the optical axis of laser light.

  It is equipped with a red laser device, a green laser device, and a blue laser device that emit red laser light, green laser light, and blue laser light, respectively, and combines the laser light of each color to generate a single light beam. There is a laser display system that projects a single light beam onto a screen via a laser control system (see, for example, Patent Document 1). In such a laser display system, an optical axis adjustment mechanism for finely adjusting the optical axis of the laser light in the laser light source device is required.

  Conventionally, various optical axis adjustment mechanisms have been proposed for the purpose of efficiently adjusting the optical axis (see, for example, Patent Document 2). Patent Document 2 discloses an X-axis support plate that is an adjustment target in the X-axis direction and an adjustment target in the Y-axis direction in a liquid crystal panel support mechanism that enables optical axis adjustment in the X-axis and Y-axis directions orthogonal to each other. A biasing force is applied to the Y-axis support plate in the X-axis direction and the Y-axis direction by a bar-shaped spring, and the X-axis adjustment plate and the Y-axis adjustment screw are rotated by turning the X-axis adjustment and Y-axis adjustment screws. It is disclosed that the position of the shaft support plate is adjusted.

JP 2007-300009 A Japanese Patent Laid-Open No. 10-133279

  By the way, if the optical axis adjustment mechanism described in Patent Document 2 is applied to the laser light source device of Patent Document 1, the optical axis adjustment in the X-axis and Y-axis directions can be performed simply by turning the screws for X-axis adjustment and Y-axis adjustment. Is possible. However, in the optical axis adjustment mechanism described in Patent Document 2, a biasing member (bar-shaped spring) that applies a biasing force in advance to a member to be adjusted (X-axis support plate, Y-axis support plate) is disposed. There is a problem that the structure is complicated.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a laser light source device capable of adjusting the optical axis without requiring a complicated configuration.

The laser light source device of the present invention includes a light source unit that emits laser light, an optical axis adjustment unit for adjusting the optical axis of the laser light emitted from the light source unit, and an attachment member to which the optical axis adjustment unit is attached. A light source irradiation unit including a prism disposed on an optical path of laser light that has passed through the optical axis adjustment unit, a prism holder that holds the prism, and a drive gear that rotates the prism holder And a drive unit having a drive motor coupled to the drive gear, and the base member to which the light source unit is fixed is attached with the attachment member with the optical axis adjustment unit attached thereto, and the optical axis The adjustment unit allows the lenses arranged on the optical path to be mutually in a plane perpendicular to the optical axis. An adjustment mechanism is provided for adjusting the position in the X and Y axis directions that intersect, the adjustment mechanism being capable of moving in the X axis direction, an X axis movement unit that moves integrally with the X axis movement unit, and Y A Y-axis moving part that is movable in the axial direction and an X-axis moving part are provided on the X-axis moving part, elastically contacting a part of the mounting member and locking the X-axis moving part to position the lens in the X-axis direction. An X-axis adjusting means for adjustment and a Y-axis moving portion provided on the Y-axis moving portion, and elastically contacting a part of the X-axis moving portion to lock the Y-axis moving portion to adjust the position of the lens in the Y-axis direction. possess a Y-axis adjusting unit, that presses the prism holder to the base member side portion of the mounting member to press the driving motor to the base member side another part of the mounting member Features.

According to the laser light source device, the X-axis adjusting unit and the Y-axis can adjust the lens position and can lock the positions of the X-axis moving unit and the Y-axis moving unit in the X-axis moving unit and the Y-axis moving unit. Since the adjusting means is provided, the position of the lens can be adjusted by the X-axis moving unit and the Y-axis moving unit itself and the lens after the position adjustment can be held, so that the optical axis can be obtained without requiring a complicated configuration. Adjustments can be made. Further, since the optical axis adjustment unit is attached to the base member via the attachment member, an operation of directly attaching the optical axis adjustment unit having an adjustment mechanism movable in the X-axis direction and the Y-axis direction to the base member can be performed. Since it becomes unnecessary, it becomes possible to improve the working efficiency when assembling the laser light source device. Furthermore, since the mounting member can have a function of pressing the drive motor in addition to a function of holding the optical axis adjustment unit and a function of pressing the prism holder, the number of parts of the device can be reduced and the manufacturing cost can be reduced. It is possible to reduce the working efficiency when assembling the apparatus.

  In the laser light source device, the X-axis moving part moves along a guide part formed on the mounting member, and the Y-axis moving part moves along a guide part formed on the X-axis moving part. It is preferable to do. In this case, since the movement path of the X-axis moving unit and the Y-axis moving unit can be stabilized, it is easy to specify the elastic contact point by the X-axis adjusting unit and the Y-axis adjusting unit. It is possible to appropriately lock the shaft moving part to the mounting member and the X-axis moving part.

  Further, in the laser light source device, the Y-axis adjusting means includes a contact portion that contacts a part of the X-axis moving portion and a bending member that is provided continuously from the contact portion. Preferably, it is elastically contacted with the protruding piece of the X-axis moving part that is formed to protrude toward the Y-axis moving part. In this case, an elastic member having an abutting portion that abuts a part of the X-axis adjusting portion, a bent portion provided continuously to the abutting portion, and a protrusion provided on the X-axis moving portion. With a simple configuration of a single piece, it is possible to adjust the position of the lens in the Y-axis direction and to lock the Y-axis moving unit with respect to the X-axis moving unit.

  Further, in the laser light source device, after the position adjustment of the lens by the X-axis adjusting unit and the Y-axis adjusting unit, the X-axis moving unit is bonded and fixed to the mounting member, and the X-axis moving unit On the other hand, it is preferable that the Y-axis moving part is bonded and fixed. In this case, after adjusting the position of the lens, the X-axis moving part and the Y-axis moving part are bonded and fixed to the attachment member and the X-axis moving part, respectively, so that the lens position after the position adjustment is securely held. It becomes possible.

  According to the present invention, an X-axis adjusting unit and a Y-axis adjusting unit capable of adjusting the lens position to the X-axis moving unit and the Y-axis moving unit and locking the positions of the X-axis moving unit and the Y-axis moving unit. Since the position of the lens is adjusted by the X-axis moving unit and the Y-axis moving unit itself, and the lens after the position adjustment can be held, the optical axis can be adjusted without requiring a complicated configuration. Can be performed.

It is a disassembled perspective view of the laser light source apparatus which concerns on one embodiment of this invention. It is a perspective view of the assembly state of the laser light source apparatus which concerns on the said embodiment. It is a side view of the assembly state of the laser light source apparatus which concerns on the said embodiment. It is a figure for demonstrating the assembly state of the light source irradiation unit which the laser light source apparatus which concerns on the said embodiment has. It is a figure for demonstrating the structure of the bracket which the laser light source apparatus which concerns on the said embodiment has. It is a figure for demonstrating the structure of the optical axis adjustment unit which the laser light source apparatus which concerns on the said embodiment has. It is a figure for demonstrating the process at the time of assembling the laser light source apparatus which concerns on the said embodiment. It is a figure for demonstrating the process at the time of assembling the laser light source apparatus which concerns on the said embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that the laser light source device according to the present embodiment is applied to, for example, a light source device of a laser display system. FIG. 1 is an exploded perspective view of a laser light source device 1 according to an embodiment of the present invention, and FIGS. 2 and 3 are a perspective view and a side view of the assembled laser light source device 1, respectively. As shown in FIGS. 1 to 3, the laser light source device 1 according to the present embodiment includes a base 2 as a base member, a light source unit 3 and a light source irradiation unit 4 attached to the base 2, and A bracket 5 as an attachment member for fixing the light source unit 3 and the light source irradiation unit 4, an optical axis adjustment unit 6 attached to the bracket 5, and a drive unit 7 for driving the light source irradiation unit 4 are provided as main components. . In the following, for convenience of explanation, the light source irradiation unit 4 side is referred to as the front side of the laser light source device 1, and the light source unit 3 side is referred to as the rear side of the laser light source device 1.

  The base 2 is formed of, for example, an insulating resin material and constitutes a bottom surface portion of the laser light source device 1. A vertical support 201 having a holding hole 201a for holding a lens holder 303 described later is provided at the rear side end of the base 2. A motor holding portion 202 that holds a driving motor 710 of the driving unit 7 described later is provided on the front side of the vertical support 201, and a driving gear 720 of the driving unit 7 described later is provided near the motor holding portion 202. A shaft portion 203 that rotatably supports the shaft portion 203 is provided. Further, a cylindrical portion 204 into which a fixed shaft 404 of the light source irradiation unit 4 described later is inserted is provided on the front side of the motor holding portion 202, and a cylindrical shape is provided in the vicinity of the cylindrical portion 204 at the time of assembly. A locking piece 205 that locks one end of the torsion spring 8 wound around the portion 204 is provided.

  The light source unit 3 includes a laser diode holder (light source support plate) 301 that holds a laser diode as a light source, and a printed circuit board (hereinafter referred to as “circuit board”) that at least functions as a power supply board for supplying power to the laser diode. 302) and a cylindrical lens holder 303 for holding a collimator lens. The laser diode holder 301 is made of a metal having good thermal conductivity so as to have a heat dissipation function, and has a laser beam emission port 301a at the center thereof. The lens holder 303 is fitted in the holding hole 201a of the vertical support 201 with a small diameter portion arranged on the front side. The laser diode holder 301 and the circuit board 302 are fixed by screws 304 to the rear surface side of the vertical support 201 in a state where the lens holder 303 is held. The circuit board 302 is fixed to the bottom surface of the base 2 with a screw 305 in the vicinity of the lower end thereof. Thus, in the present embodiment, the light source units 3 are collectively arranged on the rear side of the vertical support 201 of the base 2.

  The light source irradiation unit 4 includes a rotatable prism 401, a case 402 that holds the lower end of the prism 401, a holding member 403 that covers the prism 401 and is attached to the case 402, and the case 402. And a fixed shaft 404. In the present embodiment, the case 402 and the holding member 403 constitute a prism holder. The prism 401 defines the emission direction of the laser light emitted from the light source unit 3. The case 402 receives the driving force from the driving unit 7 and rotates the prism 401. A locking portion 402 a that locks one end of the torsion spring 8 wound around the cylindrical portion 204 of the base 2 is provided on the lower surface of the case 402. A through hole 402 b through which the fixed shaft 404 passes is formed at the center of the case 402. Furthermore, a plurality of slit portions 402c into which engaging arms 403c of a holding member 403 described later are inserted are formed in the vicinity of the side surface portion of the case 402 (not shown in FIG. 1, see FIG. 4D). . Furthermore, a gear portion 402d that meshes with a drive gear of a drive unit, which will be described later, is provided on the lower surface of the case 402 (not shown in FIG. 1, see FIG. 4D).

  The holding member 403 is formed, for example, by bending a thin metal plate, and includes an upper surface portion 403a that presses the upper surface of the prism 401, a side surface portion 403b that hangs down from the opposite side end portion of the upper surface portion 403a, and a lower end portion of the side surface portion 403b. And an engaging arm portion 403c extending downward. The upper surface portion 403a is provided with an elastic portion 403d formed by slightly bending a part of the upper surface portion 403a slightly upward, and a portion that is provided near the center of the elastic portion 403d and receives pressure from a pressing protrusion 501i of the bracket 5 described later. It has a pressing portion 403e and a holding piece 403f extending downward from its front end portion and rear end portion. The side piece 403b is provided with a holding piece 403g by forming a generally U-shaped slit in a part thereof. The fixed shaft 404 passes through the through hole 402b of the case 402 and protrudes downward, and the protruding portion is fixed to the cylindrical portion 204 of the base 2. By fixing the fixed shaft 404 to the cylindrical portion 204 in this way, the prism holder composed of the case 402 and the holding member 403 is pivotally supported on the base 2.

  FIG. 4 is a diagram for explaining an assembled state of the light source irradiation unit 4 included in the laser light source device 1 according to the present embodiment. When assembling the light source irradiation unit 4, as shown in FIG. 4, the holding shaft 403 is covered with the fixed shaft 404 passing through the through hole 402 b of the case 402 and the prism 401 placed thereon. In this case, the engaging arm portion 403 c of the holding member 403 is inserted into the slit portion 402 c formed in the vicinity of the side surface portion of the case 402, and the prism 401 is fixed to the case 402 by bending the tip portion inward. The holding pieces 403f and 403g of the holding member 403 are in a state in which the front and rear surfaces and side surfaces of the prism 401 are elastically held. Since the holding pieces 403f and 403g elastically hold the side surface of the prism 401 arranged in the case 402 in this way, even if the shape of the prism 401 varies, the variation in the shape can be reduced. The prism 401 can be held while absorbing and can be fixed at a predetermined position in the case 402. In addition, the elastic portion 403d of the holding member 403 is slightly lifted from the upper surface of the prism 401, and the pressed portion 403e is disposed substantially in parallel at a position slightly separated from the upper surface of the prism 401. It has become. The elastic portion 403d and the pressed portion 403e constitute an elastic piece that biases the prism 401 toward the base 2, and the prism 401 is reliably moved toward the base 2 by pressing from a pressing protrusion 501i of the bracket 5 described later. It can be energized.

  The bracket 5 is formed of, for example, an insulating resin material. The bracket 5 is generally fixed to the base 2 and extends from a base portion 501 that accommodates a drive motor 710 of the drive unit 7 described later, and an upper end portion of the base portion 501. It has an extension part 502 that is fixed to the vertical support 201 and holds the upper end part of the circuit board 302. As shown in more detail in FIG. 5, the base portion 501 opens downward and accommodates a housing portion 501 a that houses a drive motor 710 of the drive unit 7 to be described later, and extends from the lower end of the housing portion 501 a to the side. It has a fixed part 501b provided, a wall part 501c provided at the rear end part of the accommodating part 501a, and a pressing part 501d provided extending forward from the front end center of the accommodating part 501a.

  A pressing piece 501e is provided on the side surface of the housing portion 501a so as to be elastically deformable and presses a flange portion 713 of a drive motor 710 described later. The fixing portion 501b is provided to extend in parallel with the bottom surface of the base 2 and is fixed to the fixing hole 206 of the base 2 by a plurality of screws 501f. Guide portions 501g and 501h for slidably guiding an X-axis moving portion 610 described later are formed on the upper end portion and the lower end portion of the wall portion 501c (the guide portion 501h is not shown in FIG. 1, and FIG. c)). In addition, an opening (not shown) is formed in a portion corresponding to the optical axis in the wall portion 501c. The pressing portion 501d is provided continuously from the upper end portion of the housing portion 501a, and a pressing protrusion 501i that presses the pressed portion 403e of the holding member 403 included in the light source irradiation unit 4 is provided on the lower surface thereof. Furthermore, a pressing piece 501j that presses the surface of a motor main body 711 of a drive motor 710, which will be described later, toward the base 2 is provided on the inner wall surface of the housing portion 501a.

  The extension portion 502 extends upward from the vicinity of the rear side end portion in the upper end portion of the base portion 501, and is provided at the rear end portion of the arm portion 502a and the arm portion 502a. And a holding portion 502b for holding the upper end portion of the substrate 302. The arm portion 502a is generally L-shaped in a side view, and is fixed to a fixing hole 207 formed in the upper surface portion of the vertical support 201 by a screw 502c in the vicinity of a connection portion with the holding portion 502b. . The holding portion 502b includes a pair of claw portions 502d extending rearward from the rear end portion of the arm portion 502a and a contact portion 502e that contacts the front surface portion of the circuit board 302. . The holding part 502b holds the circuit board 302 by engaging the rear surface of the upper end part of the circuit board 302 with the claw part 502d in a state where the contact part 502e is in contact with the front part of the circuit board 302.

  The optical axis adjustment unit 6 has a concave lens 600 for adjusting the optical axis of the laser light emitted from the laser diode, and an adjustment mechanism for adjusting the position of the concave lens 600 in the XY axis direction. In the laser light source device 1 according to the present embodiment, the plane perpendicular to the optical axis is the XY plane, and the directions perpendicular to each other in the XY plane are the X-axis direction and the Y-axis direction (see FIG. 2). The adjustment mechanism described above includes an X-axis moving unit 610 that can move in the X-axis direction, and a Y-axis moving unit 620 that moves integrally with the X-axis moving unit 610 and can move in the Y-axis direction. The X-axis moving unit 610 and the Y-axis moving unit 620 adjust the position of the concave lens 600 in the X-axis direction and the Y-axis direction, respectively.

  The X-axis moving unit 610 is formed of, for example, an insulating resin material and is provided in a generally flat plate shape, and a rectangular opening 611 is formed at the center thereof. A pair of engagement pieces 612 projecting forward are provided on the side of the front side of the X-axis moving unit 610 and in the vicinity of the upper end portion. These engaging portions 612 engage with the guide portion 501 g of the bracket 5. A groove portion 612a that opens downward is formed at the lower end portion of the engagement piece 612, and a plurality of protrusion portions 612b are provided on the inner wall of the groove portion 612a (the protrusion 612b is not shown in FIG. 1). FIG. 6 (a)). The groove portion 612a is a portion that is guided by the guide portion 501g of the bracket 5 when the X-axis moving portion 610 slides, and the projection portion 612b is a portion that is in sliding contact with the surface of the guide portion 501g during the slide movement. is there. Further, a knob portion 612c configured to have an uneven shape is provided on the outer surface of the engagement piece 612. The knob portion 612 c is a portion used when the operator moves the X-axis moving portion 610 for adjusting the position of the concave lens 600.

  On the other hand, an engaging wall portion 613 is provided at the lower end portion on the front side of the X-axis moving portion 610 so as to protrude forward. The engaging wall portion 613 engages with the guide portion 501 h of the bracket 5. A side end portion of the engaging wall portion 613 is thicker than the central portion, and a groove portion 613a that opens upward is formed in the thick portion. Similar to the groove 612a, a plurality of protrusions 613b are provided on the inner wall of the groove 613a (the protrusion 613b is not shown in FIG. 1, refer to FIG. 6A). The groove portion 613a is a portion that is guided by the guide portion 501h of the bracket 5 when the X-axis moving portion 610 slides, and the projection portion 613b is a portion that is in sliding contact with the surface of the guide portion 501h during the slide movement. is there. The X-axis moving part 610 is attached to the guide parts 501g and 501h of the bracket 5 by the engaging part 612 and the engaging wall part 613, and is configured to be slidable in the X-axis direction.

  Between the pair of engagement pieces 612, a pair of elastically deformable elastic contact pieces 614 serving as an X-axis adjusting unit is provided. These elastic contact pieces 614 are provided by forming a generally U-shaped slit in the plate-like portion of the X-axis moving portion 610, and the upper end portion is fixed, while the lower end portion is elastically deformable as a free end. It is configured. A protruding piece 614 a that protrudes forward is provided at the lower end of the elastic contact piece 614. The elastic contact piece 614 restricts the movement of the X-axis moving part 610 by causing the protruding piece 614a to elastically contact the rear surface of the wall part 501c when the X-axis moving part 610 is attached to the bracket 5. That is, the elastic contact piece 614 plays a role of adjusting the position of the concave lens 600 in the X-axis direction by elastically contacting a part of the bracket 5 and locking the X-axis moving unit 610.

  Further, a projecting piece 615 that projects rearward is provided on the rear surface side of the X-axis moving unit 610 and on the upper end portion. The projecting piece 615 is provided to extend in the vertical direction at the central portion of the X-axis moving unit 610, and is disposed at a position where an elastic contact piece 624 of the Y-axis moving unit 620 described later can be elastically contacted. A pair of guide portions 616 extending in the vertical direction is provided on the side of the protruding piece 615. These guide portions 616 protrude rearward from the rear surface of the X-axis moving portion 610 and extend laterally at the rear end thereof, and guide the Y-axis moving portion 620 so as to be slidable in the vertical direction.

  The Y-axis moving part 620 is formed of, for example, an insulating resin material, is generally provided in a flat plate shape, and a circular opening 621 is formed at the center thereof. A pair of engaging portions 622 projecting forward are provided on the front side of the Y-axis moving portion 620 and in the side portion near the upper end portion. These engaging portions 622 engage with the guide portion 616 of the X-axis moving portion 610. Grooves 622a that are open to the other side are formed on the opposing inner wall portions of the engaging portions 622, and a plurality of protrusions 622b are provided on the inner wall of the groove portions 622a (see FIG. 1 for the protrusions 622b). (See FIG. 6B). The groove portion 622a is a portion guided by the guide portion 616 of the X-axis moving portion 610 when the Y-axis moving portion 620 slides, and the protrusion 622b slides on the surface of the guide portion 616 during the sliding movement. It is the part that touches. In addition, a knob portion 622c configured in an uneven shape is provided on the outer surface of the engaging portion 622. The knob portion 622c is a portion used when the operator moves the Y-axis moving portion 620 for adjusting the position of the concave lens 600.

  On the other hand, a pair of engaging portions 623 projecting forward are provided on the side of the front side of the Y-axis moving portion 620 and in the vicinity of the lower end portion. These engaging portions 623 engage with the guide portion 616 of the X-axis moving portion 610, similarly to the engaging portion 622. Grooves 623a that are open to the other side are formed on the opposing inner wall portions of the engaging portions 623, and a plurality of protrusions 623b are provided on the inner wall of the groove portions 623a (see FIG. 1 for the protrusions 623b). (Not shown in FIG. 6 (d)). The groove portion 623a is a portion that is guided by the guide portion 616 of the X-axis moving portion 610 when the Y-axis moving portion 620 slides, and the protrusion 623b slides on the surface of the guide portion 616 during the sliding movement. It is the part that touches. The Y-axis moving part 620 is attached to the guide part 616 of the X-axis moving part 610 by these engaging parts 622 and 623, and is configured to be slidable in the Y-axis direction.

  An elastically deformable elastic contact piece 624 is provided between the pair of engaging portions 622 as Y-axis adjusting means. The elastic contact piece 624 is formed in a wave shape along the left-right direction of the Y-axis moving unit 620, and is configured to be elastically contactable with the protruding piece 615 of the X-axis moving unit 610. In other words, the elastic contact piece 624 is composed of an elastic member having a contact portion that comes into contact with a part of the X-axis moving portion 610 (projecting piece 615) and a bent portion provided continuously to the contact portion. In addition, the X-axis moving unit 610 can be elastically contacted. The elastic contact piece 624 elastically contacts the rear end portion of the protruding piece 615 when the Y-axis moving unit 620 is attached to the X-axis moving unit 610 and restricts the movement of the Y-axis moving unit 620. That is, the elastic contact piece 624 plays a role of adjusting the position of the concave lens 600 in the Y-axis direction by elastically contacting a part of the X-axis moving unit 610 and locking the Y-axis moving unit 620. Further, an arc-shaped lens holding portion 625 capable of holding the concave lens 600 is provided on the rear surface side of the Y-axis moving portion 620. For example, the concave lens 600 is press-fitted into the lens holding portion 625 and is bonded and fixed with an adhesive or the like.

  FIG. 6 is a view for explaining an assembled state of the optical axis adjustment unit 6 included in the laser light source device 1 according to the present embodiment. As shown in FIG. 6, the Y-axis moving unit 620 is attached to the guide unit 616 of the X-axis moving unit 610 so as to be slidable. The X-axis moving part 610 is attached to a guide part 501g of the bracket 5 (not shown) so as to be slidable. In this case, the Y-axis moving unit 620 is attached with the elastic contact piece 624 elastically contacting the protruding piece 615 of the X-axis moving unit 610, and the X-axis moving unit 610 is elastically attached to the wall portion 501 c of the bracket 5. The contact piece 614 is attached in a state of elastic contact. Accordingly, the Y-axis moving unit 620 is held in a state stopped at the current position with respect to the X-axis moving unit 610, and the X-axis moving unit 610 is held in a state stopped at the current position with respect to the bracket 5. Is done. Therefore, an operator who adjusts the position of the concave lens 600 can easily adjust the position of the concave lens 600 by sliding the X-axis moving unit 610 and the Y-axis moving unit 620 by hand. .

  As described above, the elastic contact piece 614 that can adjust the position of the concave lens 600 and lock the positions of the X-axis movement unit 610 and the Y-axis movement unit 620 to the X-axis movement unit 610 and the Y-axis movement unit 620, and By providing the elastic contact piece 624, the X-axis moving unit 610 and the Y-axis moving unit 620 themselves can adjust the position of the concave lens 600 and can hold the concave lens 600 after the position adjustment. Further, the X-axis moving unit 610 and the Y-axis moving unit 620 are moved by sliding along the guide unit 501g of the bracket 5 and the guide unit 616 of the X-axis moving unit 610, respectively. Since the movement path of the part 620 can be stabilized, it is easy to specify the elastic contact point by the elastic contact piece 614 and the elastic contact piece 624, and the X-axis moving part 610 and the Y-axis moving part 620 are appropriately connected to the brackets 5 and X. It can be locked to the shaft moving part 610. In particular, the elastic contact piece 624 includes an elastic member having a wave shape, that is, an elastic member having a contact part that contacts a part of the X-axis moving part 610 and a bent part provided continuously to the contact part. The Y-axis moving part 620 can be locked to the X-axis moving part 610 with a simple structure by being constituted by a contact member and elastically contacting the protruding piece 615 of the X-axis moving part 610. The configuration of the elastic contact piece 624 is not limited to such a wave shape.

  The drive unit 7 includes a drive motor 710 that supplies a drive force for rotating the light source irradiation unit 4, and a drive gear 720 that transmits the drive force from the drive motor 710 to the case 402. The drive motor 710 supplies an electric signal to the motor body 711, a drive shaft 712 protruding forward from the motor body 711, a flange portion 713 provided in the vicinity of the drive motor 710 on the drive shaft 712, and the motor body 703. And a flat cable 714 for The drive motor 710 includes a flange portion 713 disposed between a pair of generally U-shaped holding pieces 202a and 202b constituting the motor holding portion 202, and the drive shaft 712 is rotatably held. It is attached to the base 2. A groove portion that meshes with a first gear portion 721 of a drive gear 720 to be described later is formed on the surface of the drive shaft 712. The flat cable 714 is drawn rearward and connected to a terminal portion provided on the rear surface of the circuit board 302.

  The drive gear 720 includes a first gear portion 721 and a second gear portion 722 having a smaller diameter than the first gear portion 721, and is attached to the base 2 while being inserted through the shaft portion 203. In this case, the drive gear 720 is attached at a position where the first gear portion 721 meshes with the drive shaft 712 and the second gear portion 722 meshes with the gear portion 402 d of the case 402. When an electric signal is supplied to the drive motor 710 and the drive shaft 712 is rotated, the first gear portion 721 is rotated accordingly, and according to the rotation of the second gear portion 722 integrated with the first gear portion 721. Then, the case 402 can be rotated to rotate the prism 401.

  Here, the process at the time of assembling the laser light source apparatus 1 which has the said structure is demonstrated. 7 and 8 are perspective views for explaining a process of assembling the laser light source device 1 according to the present embodiment. When assembling the laser light source device 1 according to the present embodiment, first, the lens holder 303 is fitted into the holding hole 201 a of the vertical support 201 of the base 2. Then, the circuit board 302 is fixed by screws 304 and 305 with the laser diode holder 301 disposed between the rear surface of the vertical support 201 with the lens holder 303 fitted thereto.

  Next, the flange portion 713 is disposed between the holding pieces 202a and 202b, and the drive motor 710 is disposed on the motor holding portion 202 of the base 2 while the drive shaft 712 is rotatably held. A flat cable 714 connected to the main body 711 is connected to a terminal portion of the circuit board 302. Then, the drive gear 720 is attached to the shaft portion 203 so that the first gear portion 721 meshes with the gear groove portion of the drive shaft 702. By attaching the light source unit 3 and the drive unit 7 to the base 2 in this way, the laser light source device 1 in the state shown in FIG. 7 is obtained. Note that the order of fixing the circuit board 302 and the like to the base 2 and attaching the drive motor 710 to the base 2 may be reversed.

  Next, the torsion spring 8 is disposed around the cylindrical portion 204 of the base 2, and the light source irradiation unit 4 is attached so that the fixed shaft 404 is inserted into the cylindrical portion 204 from above. The torsion spring 8 plays a role of eliminating play in the rotating direction of the case 402 by locking one end thereof to the locking portion 402a of the case 402 and applying a constant urging force. However, when the operation of attaching the light source irradiation unit 4 and the operation of locking one end of the torsion spring 8 to the locking portion 402a are performed at the same time, the light source irradiation unit 4 with one end of the torsion spring 8 held by hand. A complicated operation such as mounting is required. For this reason, in the laser light source device 1 according to the present embodiment, the light source irradiation unit 4 is attached in a state where one end of the torsion spring 8 is locked to the locking piece 205 of the base 2, and then the torsion spring 8. One end of the case is released to be locked to the locking portion 402a of the case 402. In this case, since the work of attaching the light source irradiation unit 4 and the work of locking one end of the torsion spring 8 to the locking portion 402a can be performed separately, the work efficiency of assembling the light source irradiation unit 4 is improved. It becomes possible. By attaching the light source irradiation unit 4 to the base 2 in this way, the laser light source device 1 in the state shown in FIG. 8 is obtained.

  As shown in FIG. 8, in the laser light source device 1 according to the present embodiment, a case 402 that receives the driving force from the driving unit 7, and one end of the case 402 are locked in the rotational direction of the case 402. A torsion spring 8 that eliminates play is disposed on the lower portion of the prism 401. Thereby, for example, when such a torsion spring 8 is disposed on the opposite side (upper side) of the holding member 403 with the prism 401 interposed therebetween, a stress that can act on the prism 401 (stress that twists the prism 401) is generated. Thus, the rotation of the case 402 can be appropriately controlled.

  Next, the bracket 5 to which the optical axis adjustment unit 6 is attached is attached to the base 2 from above the laser light source device 1 in the state shown in FIG. When the bracket 5 is attached, the drive motor 710 is accommodated in the accommodating portion 501a of the base portion 501, and the fixing portion 501b of the base portion 501 is fixed to the fixing hole 206 of the base 2 with the screw 501f, and the extension portion The holding portion 502b of 502 is fixed to the fixing hole 207 on the vertical support 201 with a screw 502c. By attaching the bracket 5 to which the optical axis adjustment unit 6 is attached to the base 2 in this way, the laser light source device 1 in the state shown in FIG. 2 is obtained. In this embodiment, the optical axis adjustment unit 6 having an adjustment mechanism that is movable in the X-axis direction and the Y-axis direction by attaching the bracket 5 to which the optical axis adjustment unit 6 is attached to the base 2. Therefore, the work efficiency when assembling the laser light source device 1 is improved.

  When the bracket 5 is thus attached to the base 2, the pressed portion 403 e of the holding member 403 of the light source irradiation unit 4 is pressed by the pressing protrusion 501 i of the pressing portion 501 d of the base portion 501. As a result, the prism 401 is urged toward the base 2 by the elastic portion 403d of the holding member 403, so that rattling of the prism 401 that can occur in the thrust direction of the rotation axis of the prism holder can be suppressed. It has become. Further, the rear surface of the upper end portion of the circuit board 302 is held by the pair of claw portions 502d of the holding portion 502b of the extending portion 502. Thereby, the upper end part of the circuit board 3 fixed to the base 2 is held, and the base 2 and the bracket 5 can be integrated. Further, the drive motor 710 is pressed to the base 2 side by the pressing piece 501j provided on the inner wall surface of the housing portion 501a of the base portion 501. Thereby, the drive motor 710 can be pressed only by attaching the bracket 5 to the base 2 without requiring a separate configuration for pressing (positioning) the drive motor 710 toward the base 2. . Thus, by giving the bracket 5 a plurality of functions such as a function of pressing the pressed portion 401 and a function of pressing the drive motor 710, the number of parts of the apparatus can be reduced and the manufacturing cost can be reduced. The work efficiency when assembling can be improved.

  After being assembled as shown in FIG. 2, in the laser light source device 1 according to the present embodiment, the X-axis moving unit 610 and the Y-axis moving unit 620 of the optical axis adjusting unit 6 are slid and moved by hand. While adjusting the position of 600, the angle of the prism 401 is adjusted by rotating the light source irradiation unit 4 by the drive unit 7. Then, the X-axis moving unit 610 and the Y-axis moving unit 620 of the optical axis adjustment unit 6 are fixed with an adhesive or the like. Thereby, the adjusted optical axis can be reliably held, and the laser light source device 1 is completed.

  In the laser light source device 1 assembled in this way, the laser light from the laser diode held by the laser diode holder 301 of the light source unit 3 is emitted from the laser light emission port 301a and held by the lens holder 303. After passing through the lens, it passes through the concave lens 600 of the optical axis adjustment unit 6, proceeds in the direction defined by the prism 401 of the light source irradiation unit 4, and is guided to the display screen of the laser display system, for example.

  As described above, in the laser light source device 1 according to the present embodiment, the X axis moving unit 610 and the Y axis included in the optical axis adjustment unit 6 for adjusting the optical axis of the laser light emitted from the light source unit 3. Since the moving unit 620 is provided with the elastic contact piece 614 and the elastic contact piece 624 that can adjust the position of the concave lens 600 and can lock the positions of the X-axis moving unit 610 and the Y-axis moving unit 620, the X-axis Since the position of the concave lens 620 can be adjusted by the moving unit 610 and the Y-axis moving unit 620 itself, and the concave lens 600 after the position adjustment can be held, the optical axis can be adjusted without requiring a complicated configuration. It becomes.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

DESCRIPTION OF SYMBOLS 1 Laser light source device 2 Base 201 Vertical support body 202 Motor holding part 203 Shaft part 204 Cylindrical part 205 Locking piece 206,207 Fixing hole 3 Light source unit 301 Laser diode holder 301a Laser beam emission port 302 Printed circuit board (circuit board) )
303 Lens holder 304, 305 Screw 4 Light source irradiation unit 401 Prism 402 Case 402a Locking portion 402b Through hole 403 Holding member 403a Upper surface portion 403b Side surface portion 403c Engaging arm portion 403d Elastic portion 403e Pressed portion 403f, 403g Holding piece 404 Fixed Shaft 5 Bracket 501 Base portion 501a Housing portion 501b Fixing portion 501c Wall portion 501d Pressing portion 501e Pressing piece 501g, 501h Guide portion 501i Pressing protrusion 502 Extension portion 502a Arm portion 502b Holding portion 502c Screw portion 502d Claw portion 502e Claw portion 502e Adjustment unit 600 Concave lens 610 X-axis moving part 611 Opening part 612 Engaging part 612a Groove part 612b Protruding part 612c Knob part 613 Engaging wall part 613a Groove part 613b Protruding part 614 Elastic contact piece 614 Projection piece 615 Projection piece 616 Guide part 620 Y-axis moving part 621 Opening part 622 Engagement part 622a Groove part 622b Projection part 622c Knob part 623 Engagement part 623a Groove part 623b Projection part 624 Elastic contact piece 625 Lens holding part 7 Drive unit 7 Drive unit 7 Motor 711 Motor body 712 Drive shaft 713 Flange portion 714 Flat cable 720 Drive gear 721 First gear portion 722 Second gear portion 8 Torsion spring

Claims (4)

A laser light source device comprising a light source unit that emits laser light, an optical axis adjustment unit for adjusting the optical axis of laser light emitted from the light source unit, and an attachment member to which the optical axis adjustment unit is attached,
A light source irradiation unit having a prism disposed on an optical path of laser light that has passed through the optical axis adjustment unit and a prism holder for holding the prism, a drive gear for rotating the prism holder, and a drive gear connected to the drive gear. A drive unit having a drive motor,
Attaching the attachment member in a state where the optical axis adjustment unit is attached to a base member to which the light source unit is fixed,
The optical axis adjustment unit has an adjustment mechanism for adjusting the position of the lens arranged on the optical path in the X and Y axis directions orthogonal to each other in a plane orthogonal to the optical axis,
The adjustment mechanism is provided in the X-axis moving unit that can move in the X-axis direction, the Y-axis moving unit that can move integrally with the X-axis moving unit and move in the Y-axis direction, and the X-axis moving unit. An X-axis adjusting means for adjusting the position of the lens in the X-axis direction by elastically contacting a part of the mounting member and locking the X-axis moving portion; and the Y-axis moving portion, elastic contact part of the axis movement unit is engaged the Y-axis moving unit possess a Y-axis adjusting means for adjusting the position of the Y-axis direction of the lens,
A laser light source device , wherein the prism holder is pressed toward the base member by a part of the mounting member, and the drive motor is pressed toward the base member by another part of the mounting member .   The X-axis moving part moves along a guide part formed on the mounting member, and the Y-axis moving part moves along a guide part formed on the X-axis moving part. The laser light source device according to claim 1.   The Y-axis adjusting means includes an elastic contact member having a contact portion that contacts a part of the X-axis moving portion and a bent portion provided continuously to the contact portion, and the Y-axis movement The laser light source device according to claim 1, wherein the laser light source device is elastically contacted with a protruding piece of the X-axis moving portion that is formed to protrude toward the portion side.   After adjusting the position of the lens by the X-axis adjusting unit and the Y-axis adjusting unit, the X-axis moving unit is bonded and fixed to the mounting member, and the Y-axis moving unit is bonded to the X-axis moving unit. The laser light source device according to any one of claims 1 to 3, wherein the laser light source device is fixed.

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