JP2015225250A - Projector and resin conjugate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of preventing a positional deviation among three or more laminated members and a resin conjugate.SOLUTION: A projector 100 includes a housing 3 which is made of a light-absorbing resin, base members 4a to 4c which are laminated on the outer surface of the housing 3 and made of a light-transmitting resin, LD holders 5a to 5c which are laminated on the outer surfaces of the base members 4a to 4c and made of the light-transmitting resin, and a scan mirror part 24 which projects an image 91 based on laser light from LDs 51a to 51c after passing through the housing 3. The base members 4a to 4c are laser-welded to the housing 3. The housing 3 includes a projection projecting to the sides of the base members 4a to 4c and the LD holders 5a to 5c and the housing 3 are laser-welded in the projection.

Description

  The present invention relates to a projector and a resin joined body, and more particularly to a projector and a resin joined body having a configuration in which three or more members are positioned in a stacked state.

  2. Description of the Related Art Conventionally, there is known an optical path adjustment device that is positioned with respect to each other in a state where three or more members are laminated (see, for example, Patent Document 1).

  In Patent Document 1, a housing into which light from a light source enters, a base member that holds a lens that is laminated on the outer surface of the housing and is irradiated with light from the light source, and are laminated on an outer surface of the base member, An optical path adjusting device including a light source holder that holds a light source is disclosed. The housing and the base member are fixed by bolts while being positioned with respect to each other. Further, the base member and the light source holder are fixed with bolts while being positioned with respect to each other. This optical path adjusting device can also be applied to optical devices such as projectors.

Japanese Patent Laid-Open No. 5-323166

  However, in the projector including the optical path adjusting device described in Patent Document 1, the housing, the base member, and the light source holder may be displaced from each other due to the influence of looseness after the bolt is tightened or torque generated when the bolt is tightened. There is a problem that there is.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a projector capable of preventing misalignment of three or more stacked members, and It is to provide a resin joined body.

  A projector according to a first aspect of the present invention is configured such that light from a light source is incident and a housing made of one of a light-transmitting resin or a light-absorbing resin and a housing laminated on the outer surface of the light source. A base member composed of a light-transmitting resin or light-absorbing resin and a base member made of light-transmitting resin or light-absorbing resin are laminated on the outer surface of the base member to hold the light source and light-transmitting resin or light-absorbing A light source holder composed of the other of the resins, and a projection unit that projects an image based on light from the light source via the housing, the base member being laser welded to the light source holder or the housing, and at least the light source holder or the housing One has a protruding portion protruding toward the base member, and the light source holder and the housing are laser welded at the protruding portion. To have.

  In the projector according to the first aspect of the present invention, as described above, the housing composed of one of the light-transmitting resin or the light-absorbing resin and the outer surface of the housing are laminated, and the light-transmitting resin or the light-absorbing resin is laminated. A base member made of resin and a light source holder laminated on the outer surface of the base member and made of the other of the light transmitting resin or the light absorbing resin are provided, and the base member is laser welded to the light source holder or the housing. At least one of the light source holder and the housing is provided with a protruding portion that protrudes toward the base member, and the light source holder and the housing are laser-welded at the protruding portion. Thereby, the light source holder as the surface layer, the base member as the intermediate layer, and the housing as the deep layer are laminated in order from the side irradiated with the laser beam for laser welding (outside of the housing). Then, in the direction in which the housing, the base member, and the light source holder are stacked (stacking direction), a portion where the deep housing and the surface light source holder are stacked without the intermediate base member is partially formed by the protrusions. Can be provided. That is, it is possible to partially provide the two layers of the light source holder and the housing as viewed from the side where the laser beam for laser welding is irradiated. Thereby, a housing and a light source holder can be laser-welded in the state which laminated | stacked the housing, the base member, and the light source holder on three layers. As a result, since there is no need to provide a base member and a light source holder that are bolted to the housing as in the prior art, misalignment of the stacked housing, base member, and light source holder can be prevented. . In addition, since it is not necessary to provide a member for joining such as a bolt and a mounting hole for the bolt, the configuration can be simplified.

  In the projector according to the first aspect, the base member preferably has an opening into which the protrusion is inserted. If comprised in this way, since the light source holder in the surface layer and the housing in the deep layer can be laser-welded with the base member sandwiched between them by the projecting portion through the opening, the light source holder and the housing are There is no need to laser weld outside the end of the base member. Therefore, it is possible to prevent an overhang from the base member of the light source holder (the light source holder projects from the end of the base member) when viewed from the stacking direction. Accordingly, all the end portions of the base member are exposed outward. As a result, the base member can be reliably chucked (gripped) during positioning.

  In this case, preferably, a plurality of protrusions are provided, and the opening of the base member includes a plurality of through holes into which the plurality of protrusions are respectively inserted. If comprised in this way, since a housing and a light source holder are laser-welded in a some protrusion part, a housing and a light source holder can be joined firmly.

  In the projector according to the first aspect, preferably, the height of the protrusion is larger than the thickness of the base member in the direction in which the housing, the base member, and the light source holder are stacked. If comprised in this way, since the height of a protrusion part will become larger than the thickness of a base member, even if a base member is arrange | positioned between a housing and a light source holder, a housing and a light source holder are reliably laser-welded. be able to.

  In the projector according to the first aspect, preferably, the light source holder includes a protrusion formed on the housing side and a recess formed on the opposite side of the housing so as to correspond to the protrusion. If comprised in this way, since the thickness of the protrusion part of the light source holder which a laser beam passes will become small by a recessed part, the energy loss at the time of laser welding can be reduced by the part which thickness reduces. As a result, laser welding can be performed efficiently.

  In the projector according to the first aspect described above, preferably, the housing is made of a light-absorbing resin, the base member and the light source holder are made of a light-transmitting resin, and the housing protrudes toward the light source holder. The laser beam is welded to the light source holder at the tip of the projecting portion, and is laser welded to the base member in a region where it comes into contact with the base member. If comprised in this way, since the light source holder and the base member can be fixed to a highly rigid housing that serves as a positioning reference by laser welding, the rigidity of the light source holder and the base member can be increased.

  In the projector according to the first aspect, preferably, the housing and the base member are made of a light absorbing resin, the light source holder is made of a light transmissive resin, and the housing protrudes toward the light source holder. And is laser welded to the light source holder at the tip of the protruding portion, and the light source holder is laser welded to the base member in a region where the light source holder comes into contact with the base member. If comprised in this way, the base member of an intermediate | middle layer and the housing of a deep layer can be laser-welded with respect to the light source holder of surface layer.

  In the projector according to the first aspect, the light source holder preferably includes a light source holding part having a first thickness and a welding part having a second thickness smaller than the first thickness. If comprised in this way, since a welding part becomes thin compared with a light source holding part, the energy loss at the time of laser welding can be reduced. As a result, laser welding can be performed efficiently while ensuring the rigidity of the light source holder.

  The resin joined body according to the second aspect of the present invention is laminated on the outer surface of the first resin member composed of one of the light-transmitting resin or the light-absorbing resin and the light-transmitting resin. A second resin member made of a resin or a light-absorbing resin, and a third resin member laminated on the outer surface of the second resin member and made of the other of the light-transmitting resin or the light-absorbing resin. The second resin member is laser welded to the first resin member or the third resin member, and at least one of the first resin member or the third resin member has a protruding portion protruding toward the second resin member, The first resin member and the third resin member are laser welded at the protruding portion.

  In the resin joined body according to the second aspect of the present invention, as described above, the first resin member composed of one of the light-transmitting resin or the light-absorbing resin and the outer surface of the first resin member are laminated. And a second resin member made of a light transmissive resin or a light absorptive resin, and a second resin member laminated on the outer surface of the second resin member and made of the other of the light transmissive resin or the light absorptive resin. 3 resin members, the second resin member is laser welded to the first resin member or the third resin member, and the protruding portion protrudes to the second resin member side at least one of the first resin member or the third resin member And the first resin member and the third resin member are laser-welded at the protruding portion. Thereby, the 3rd resin member as a surface layer, the 2nd resin member as an intermediate | middle layer, and the 1st resin member as a deep layer are laminated | stacked in an order from the side irradiated with the laser beam for laser welding. And in the direction (laminating direction) where the 1st resin member (deep layer), the 2nd resin member (intermediate layer), and the 3rd resin member (surface layer) are laminated, the 1st resin member of the deep layer and the surface layer A portion where the third resin member is stacked without the second resin member of the intermediate layer can be partially provided. That is, when viewed from the side where the laser beam for laser welding is irradiated, a portion that becomes two layers of the first resin member and the third resin member can be partially provided. Thereby, the first resin member, the second resin member, and the third resin member can be laser-welded with the first resin member and the third resin member in a state where the first resin member, the second resin member, and the third resin member are laminated in three layers. As a result, there is no need to provide a configuration in which the second resin member and the third resin member are attached to the first resin member with bolts as in the prior art, so the stacked first resin member, second resin member, and second resin member Misalignment between the three resin members can be prevented. In addition, since it is not necessary to provide a member for joining such as a bolt and a mounting hole for the bolt, the configuration can be simplified.

  According to the present invention, as described above, it is possible to provide a projector and a resin joined body that can prevent the positional deviation of three or more laminated members from each other.

It is the block diagram which showed the whole structure of the projector by 1st-3rd embodiment of this invention. It is the top view which showed the light source device of the projector by 1st Embodiment of this invention. It is a disassembled perspective view of the light source device of the projector by 1st Embodiment of this invention. It is a perspective view of the light source device of the projector by 1st Embodiment of this invention. It is an expanded sectional view of the light source device along the 500-500 line of FIG. It is an expanded sectional view of the light source device along the 600-600 line of FIG. It is a perspective view of the light source device of the projector by 2nd Embodiment of this invention. It is an expanded sectional view of the light source device along 700-700 line of FIG. It is an expanded sectional view of the light source device of the projector by 3rd Embodiment of this invention.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings.

(First embodiment)
The configuration of the projector 100 according to the first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the projector 100 according to the first embodiment of the present invention includes a light source device 1, a control unit 21, a light source driver 22, a mirror driver 23, and a scanning mirror 24. The projector 100 is configured to project an image 91 based on the laser light from the light source device 1 onto the screen 92 by scanning the laser light emitted from the light source device 1 with the scanning mirror 24. The scanning mirror 24 is an example of the “projection unit” in the present invention. Laser light is an example of “light” in the present invention.

  The control unit 21 includes a CPU (Central Processing Unit) and is configured to control each unit of the projector 100. The control unit 21 is configured to perform control so that a predetermined image 91 is projected on the screen 92 based on a video signal input from the outside.

  Specifically, the control unit 21 is configured to perform control for driving the light source device 1 via the light source driver 22 based on a video signal input from the outside. As a result, laser light for forming the image 91 is emitted from the light source device 1. Further, the control unit 21 is configured to perform control for driving (swinging) the scanning mirror 24 via the mirror driver 23. The control unit 21 is configured to perform control to adjust the timing at which the laser light is emitted from the light source device 1 and the timing at which the scanning mirror 24 is driven (oscillated).

  The scanning mirror 24 has a reflecting surface 24a on the surface on which the laser light from the light source device 1 is irradiated. Further, the scanning mirror 24 is configured to scan the laser light by being driven in two horizontal and vertical directions of the image 91. The scanning mirror 24 is configured to scan at high speed in the horizontal direction by resonance driving and to scan at low speed in the vertical direction by DC driving.

  As shown in FIG. 2, the light source device 1 includes a housing 3, base members 4 a to 4 c attached to the housing 3, and laser diode holders (hereinafter referred to as LD holders) 5 a to 5 c attached to the housing 3. ing. Further, the light source device 1 is held by three prisms 31a to 31c arranged inside the housing 3, collimating lenses 42a to 42c held by the base members 4a to 4c, and LD holders 5a to 5c, respectively. Laser diodes (hereinafter referred to as LD) 51a to 51c are provided. In the light source device 1, the base members 4 a to 4 c and the LD holders 5 a to 5 c are positioned with respect to the housing 3 and are fixed by laser welding. As a result, the light source device 1 is configured to combine various laser beams (red, green, and blue laser beams) emitted from the LDs 51 a to 51 c in the prisms 31 a to 31 c and emit them to the scanning mirror 24. ing. Details will be described later. The collimating lenses 42a to 42c are all examples of the “lens” of the present invention. The LD holders 5a to 5c are both examples of the “light source holder” of the present invention.

  The LDs 51a to 51c are configured to emit red, green, and blue laser beams, respectively. The prism 31c is configured to transmit the blue laser light from the LD 51c. The prism 31a is configured to reflect the red laser light from the LD 51a and combine the reflected red laser light and the blue laser light from the LD 51c. The prism 31b is configured to reflect the green laser light from the LD 51b and combine the reflected green laser light, the red laser light from the LD 51a, and the blue laser light from the LD 51c. .

  The housing 3 is configured such that the laser beams from the LDs 51a to 51c are incident on the inside from the outside. In addition, as described above, the housing 3 includes prisms 31a to 31c that synthesize incident laser beams. In addition, the housing 3 is attached with the base members 4a to 4c and the LD holders 5a to 5c so that the positions of the collimating lenses 42a to 42c, the LDs 51a to 51c, and the prisms 31a to 31c can be determined. It is configured. The housing 3 includes four side walls 32a to 32d, and has a box shape (see FIG. 3) whose upper side (Z1 direction) is open.

  On the side wall 32a side (Y2 direction side), the base member 4a and the LD holder 5a are sequentially stacked in the direction from the inner side to the outer side of the housing 3 (Y2 direction). That is, the housing 3, the base member 4a, and the LD holder 5a are disposed so as to be a deep layer, an intermediate layer, and a surface layer, respectively, when laser welding is performed from the outside.

  Further, the base member 4b and the LD holder 5b are sequentially stacked in the direction from the inner side to the outer side (Y1 direction) of the housing 3 on the side wall 32b side (Y1 direction side) facing the side wall 32a. Has been. That is, the housing 3, the base member 4b, and the LD holder 5b are arranged so as to be a deep layer, an intermediate layer, and a surface layer when laser welding is performed from the outside, respectively.

  Further, on the side wall 32c side (X1 direction side) orthogonal to the side walls 32a and 32b, the base member 4c and the LD holder 5c are stacked in this order from the inner side to the outer side (X1 direction) of the housing 3. Is arranged. That is, the housing 3, the base member 4c, and the LD holder 5c are disposed so as to be a deep layer, an intermediate layer, and a surface layer, respectively, when laser welding is performed from the outside.

  As shown in FIG. 3, the side walls 32 a to 32 c have rectangular first holes for allowing the laser beams from the LDs 51 a to 51 c to enter the inside of the housing 3 at positions corresponding to the LDs 51 a to 51 c, respectively. Portions 132a to 132c are formed.

  Further, as shown in FIG. 2, on the side wall 32d side (X2 direction side) facing the side wall 32c, the laser beams emitted from the LDs 51a to 51c and synthesized by the prisms 31a to 31c are disposed outside the housing 3. A second hole 132d (see FIG. 2) for emitting light toward the scanning mirror 24 is formed.

  In the first embodiment, the housing 3 is made of a light absorbing resin, and the base members 4a to 4c and the LD holders 5a to 5c are made of a light transmissive resin. The base members 4a to 4c are formed in a rectangular shape and a flat plate shape. The LD holders 5a to 5c include an LD holding part 53 and welded parts 54a and 54b. The LD holding unit 53 is an example of the “light source holding unit” in the present invention.

  The base members 4a to 4c and the LD holders 5a to 5c attached to the side walls 32a to 32c of the housing 3 have the same configuration. Therefore, in the following, the configuration on the side wall 32a side (Y2 direction side) (the configuration of the base member 4a, the LD holder 5a, etc.) will be described in detail, and the description on the configuration on the side wall 32b side and the side wall 32c side will be omitted. Hereinafter, a direction in which the housing 3, the base member 4a, and the LD holder 5a are stacked in this order is referred to as a stacking direction (Y direction).

  As shown in FIG. 3, the housing 3 has two protruding portions 34 a and 34 b that protrude on the outer surface 33 toward the base member 4 a side (Y2 direction side). Further, the protruding portion 34a is provided on the left side (X2 direction side) and the lower side (Z2 direction side) of the first hole portion 132a. Further, the protrusion 34b is provided on the right side (X1 direction side) and the upper side (Z1 direction side) of the first hole 132a. Further, as shown in FIG. 4, the housing 3 is laser-welded to the LD holder 5a at the protrusions 34a and 34b.

  Specifically, the protrusions 34a and 34b both extend in the stacking direction (Y direction) and are formed in a columnar shape. As shown in FIG. 5, the height H1 of the protrusion 34a is larger than the thickness T3 of the base member 4a in the stacking direction (Y direction). Further, as shown in FIGS. 4 and 5, the protrusions 34a and 34b are inserted into through holes 43a and 43b, which will be described later, of the base member 4a, respectively, and the circular tip surface (region A1) has the LD holder 5a. It contacts the back surface 52 (surface on the Y1 direction side) (see FIG. 5). The housing 3 is laser welded to the back surface 52 of the LD holder 5a at the tips (region A1) of the protrusions 34a and 34b. The laser for laser welding is irradiated from the outside of the housing 3 toward the inside.

  As shown in FIG. 6, the outer surface 33 of the housing 3 abuts against the back surface 41 (the surface on the Y1 direction side) of the base member 4a. As shown in FIGS. 3 and 4, the housing 3 is laser-welded to the base member 4a in a region (region B) in contact with the back surface 41 of the base member 4a. Specifically, the housing 3 includes the base member 4a and the laser in a predetermined area (area B) above the protrusion 34a (Z1 direction) and a predetermined area (area B) below the protrusion 34b (Z2 direction). It is welded.

  The base member 4a is configured to be laminated on the outer surface 33 of the housing 3 (arranged on the Y2 direction side of the outer surface 33). In addition, the base member 4a includes two through holes 43a and 43b having circular shapes, with the protrusions 34a and 34b being inserted at positions corresponding to the protrusions 34a and 34b of the housing 3, respectively. Further, as shown in FIG. 5, a predetermined gap is provided between the through holes 43 a and 43 b of the base member 4 a and the protrusions 34 a and 34 b of the housing 3. Thus, the base member 4a is configured to be movable in a direction orthogonal to the stacking direction (Y direction) by a predetermined gap with respect to the housing 3 before laser welding.

  Further, as described above, the base member 4a includes a predetermined region (region B) above the projecting portion 34a of the housing 3 (region B) and a predetermined region (region B) below the projecting portion 34b of the housing 3 (Z2 direction). ) And laser welded to the housing 3. In other words, the base member 4a has a rectangular diagonal position of the base member 4a where the protrusions 34a and 34b of the housing 3 are not disposed (in the vicinity of the corners on the X2 direction side and the Z1 direction side, and on the X1 direction side and the Z2 direction). Laser welding is performed in the vicinity of the corners on the side). Thus, the base member 4a is laser-welded to the housing 3 in two spaced apart regions (region B). Thereby, the attachment state with respect to the housing 3 is stabilized.

  As shown in FIG. 5, the LD holder 53 of the LD holder 5a has a first thickness T1 in the stacking direction (Y direction). The welded portions 54a and 54b of the LD holder 5a have a second thickness T2 that is smaller than the first thickness T1 in the stacking direction (Y direction). The LD holding part 53 is formed in a rectangular shape and a flat plate shape. Further, the LD holding portion 53 is formed with a hole portion 55 to which the LD 51a is attached at the center.

  As shown in FIGS. 3 and 4, the weld portion 54 a is formed in a rectangular shape and a flat plate shape. Further, the welded portion 54a protrudes in the X2 direction so as to cover the tip (region A1) of the protruding portion 34a of the housing 3 from the lower side and the left end of the LD holding portion 53. Moreover, the welding part 54b is formed in rectangular shape and flat plate shape. Further, the welding portion 54b protrudes in the X1 direction so as to cover the tip (region A1) of the protruding portion 34b of the housing 3 from the upper side and the right end portion of the LD holding portion 53. Further, the width in the vertical direction (Z direction) of the welded portions 54 a and 54 b is substantially half of the width in the vertical direction of the LD holding portion 53.

  Further, the LD holder 5a is laser-welded to the projections 34a and 34b of the housing 3 at the tips of the projections 34a and 54b of the rear surface 52 (region A1), respectively. That is, the LD holder 5a is located near the rectangular diagonal of the LD holder 5a on which the protrusions 34a and 34b of the housing 3 are disposed (in the vicinity of the corners on the X2 direction side and the Z2 direction side, the X1 direction side, and the Z1 direction). Laser welding is performed in the vicinity of the corners on the side). As described above, the LD holder 5a is laser-welded to the housing 3 in two spaced apart regions. Thereby, the attachment state of the LD holder 5a with respect to the housing 3 is stabilized.

  In the first embodiment, the following effects can be obtained.

  In the first embodiment, as described above, the housing 3 made of the light absorbing resin, the base members 4a to 4c laminated on the outer surface 33 of the housing 3 and made of the light transmissive resin, and the base member LD holders 5a to 5c that are laminated on the outer surface 44 of 4a to 4c and are made of a light-transmitting resin are provided, and base members 4a to 4c are laser welded to the LD holders 5a to 5c or the housing 3 to the housing 3 Projections 34a and 34b projecting toward the base members 4a to 4c are provided, and the LD holders 5a to 5c and the housing 3 are laser welded at the projections 34a and 34b. Thereby, the LD holders 5a to 5c as the surface layer, the base members 4a to 4c as the intermediate layer, and the housing 3 as the deep layer are laminated in order from the side irradiated with the laser beam for laser welding (outside the housing 3). Is done. In the direction in which the housing 3, the base members 4a to 4c and the LD holders 5a to 5c are stacked (stacking direction), the deep housing 3 and the surface LD holders 5a to 5c are intermediate layers by the protrusions 34a and 34b. It is possible to partially provide a portion to be laminated without using the base members 4a to 4c. That is, when viewed from the side where the laser beam for laser welding is irradiated, the two portions of the LD holders 5a to 5c and the housing 3 can be partially provided. Thereby, the housing 3 and the LD holders 5a to 5c can be welded in a state where the housing 3, the base members 4a to 4c and the LD holders 5a to 5c are laminated in three layers. As a result, there is no need to provide a structure for attaching the base members 4a to 4c and the LD holders 5a to 5c to the housing 3 with bolts as in the prior art, so the stacked housing 3, the base members 4a to 4c and the LD holder are stacked. It is possible to prevent misalignment of 5a to 5c. In addition, since it is not necessary to provide a member for joining such as a bolt and a mounting hole for the bolt, the configuration can be simplified.

  In the first embodiment, as described above, the base members 4a to 4c are provided with the through holes 43a and 43b into which the protruding portions 34a and 34b are inserted. Thereby, laser welding of the LD holders 5a to 5c on the surface layer and the housing 3 on the deep layer with the base members 4a to 4c sandwiched by the protrusions 34a and 34b through the through holes 43a and 43b is possible. Therefore, there is no need to laser weld the LD holders 5a to 5c and the housing 3 outside the ends of the base members 4a to 4c. Therefore, when viewed from the stacking direction, it is possible to prevent overhang from the base members 4a to 4c of the LD holders 5a to 5c (the LD holders 5a to 5c project from the end portions of the base members 4a to 4c). Accordingly, all of the end portions of the base members 4a to 4c are exposed outward. As a result, the base members 4a to 4c can be reliably chucked (gripped) during positioning.

  In the first embodiment, as described above, a plurality of protrusions 34a and 34b are provided, and a plurality of through holes 43a and 43b into which the plurality of protrusions 34a and 34b are inserted are provided. Thereby, the housing 3 and the LD holders 5a to 5c are laser-welded at the plurality of protrusions 34a and 34b, so that the housing 3 and the LD holders 5a to 5c can be firmly joined.

  In the first embodiment, as described above, in the direction in which the housing 3, the base members 4a to 4c and the LD holders 5a to 5c are stacked, the height H1 of the protrusions 34a and 34b is set to the base members 4a to 4c. It is made larger than the thickness T3. As a result, the height H1 of the protrusions 34a and 34b becomes larger than the thickness T3 of the base members 4a to 4c, so that the base members 4a to 4c can be reliably disposed between the housing 3 and the LD holders 5a to 5c. The housing 3 and the LD holders 5a to 5c can be laser-welded.

  In the first embodiment, as described above, the housing 3 is made of a light-absorbing resin, and the base members 4a to 4c and the LD holders 5a to 5c are made of a light-transmitting resin. Protrusions 34a and 34b projecting toward the LD holders 5a to 5c are provided, and laser welding is performed with the LD holders 5a to 5c at the tips of the projecting parts 34a and 34b, and the base member 4a is in a region where the base members 4a to 4c abut. Laser welding with ~ 4c. Thus, by laser welding, the LD holders 5a to 5c and the base members 4a to 4c can be fixed to the highly rigid housing 3 serving as a positioning reference, so that the LD holders 5a to 5c and the base members 4a to 4c can be fixed. The rigidity of can be increased.

  In the first embodiment, as described above, the LD holders 5a to 5c are provided with the LD holding portion 53 having the first thickness T1 and the weld portion having the second thickness T2 smaller than the first thickness T1. 54a and 54b are provided. As a result, the welded parts 54a and 54b have a smaller thickness than the LD holding part 53, so that energy loss during laser welding can be reduced. As a result, laser welding can be performed efficiently while ensuring the rigidity of the LD holders 5a to 5c.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. 1, FIG. 7, and FIG. In the second embodiment, unlike the first embodiment in which the housing 3 and base members 4a to 4c made of light-transmitting resin are laser-welded, the base member made of the LD holder 205 and the light-absorbing resin. An example of laser welding 204 is described. In addition, the same structure as the said 1st Embodiment attaches | subjects and shows the same code | symbol as 1st Embodiment, and abbreviate | omits description. The LD holder 205 is an example of the “light source holder” in the present invention.

  A projector 200 (see FIG. 1) according to the second embodiment includes a base member 204 and an LD holder 205 as shown in FIG. In the second embodiment, the housing 3 and the base member 204 are made of a light absorbing resin, and the LD holder 205 is made of a light transmissive resin.

  As shown in FIG. 8, the base member 204 is disposed so that the outer surface 44 contacts the LD holder 205. Further, the back surface 41 of the base member 204 is separated from the outer surface 33 of the housing 3.

  As shown in FIG. 7, the LD holder 205 includes a welded portion 254 a that protrudes in the X2 direction so as to cover the tip end (region A <b> 1) of the protruding portion 34 a of the housing 3 from the left end portion of the LD holding portion 53. In addition, the LD holder 205 includes a welded portion 254b that protrudes in the X1 direction so as to cover the tip (region A1) of the protruding portion 34b of the housing 3 from the right end portion of the LD holding portion 53. Further, the width in the vertical direction (Z direction) of the welded portions 254a and 254b is equal to the width in the vertical direction of the LD holding portion 53.

  In addition, the LD holder 205 is laser-welded to the base member 204 in a region (region C) that contacts the base member 204. That is, the welded portion 254a of the LD holder 205 is laser welded to the base member 204 in a predetermined region (region C) above the tip of the protruding portion 34a (Z1 direction). The welded portion 254b of the LD holder 205 is laser welded to the base member 204 in a predetermined region (region C) below the tip of the protruding portion 34b (Z2 direction). As described above, in the second embodiment, the base member 204 is fixed to the housing 3 via the LD holder 205.

  Other configurations of the second embodiment are the same as those of the first embodiment.

  In the second embodiment, the following effects can be obtained.

  In the second embodiment, as in the first embodiment, the housing 3 made of light-absorbing resin, the base member 204 made of light-transmitting resin and laminated on the outer surface 33 of the housing 3, An LD holder 205 that is laminated on the outer surface 44 of the base member 204 and is made of a light transmissive resin is provided. The base member 204 is laser welded to the LD holder 205 or the housing 3, and the base member 204 is attached to the housing 3. Protruding protrusions 34a and 34b are provided, and the LD holder 205 and the housing 3 are laser welded at the protrusions 34a and 34b. Thus, the laser welding can be performed in a state where the housing 3, the base member 204, and the LD holder 205 are laminated in three layers by the protrusions 34a and 34b. As a result, misalignment of the stacked housing 3, base member 204, and LD holder 205 can be prevented.

  In the second embodiment, as described above, the housing 3 and the base member 204 are made of a light absorbing resin, and the LD holder 205 is made of a light transmissive resin. Protruding portions 34 a and 34 b projecting toward the surface are provided, laser welding is performed with the LD holder 205 at the tips of the projecting portions 34 a and 34 b, and the LD holder 205 is laser-welded with the base member 204 in a region where the base member 204 abuts. Accordingly, the intermediate layer base member 204 and the deep housing 3 can be laser-welded to the surface LD holder 205.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. 1 and 9. In the third embodiment, an example will be described in which the LD holder 305 has projecting portions 355a and 355b, unlike the first embodiment in which the housing 3 has projecting portions 34a and 34b. In addition, the same structure as the said 1st Embodiment attaches | subjects and shows the same code | symbol as 1st Embodiment, and abbreviate | omits description. The LD holder 305 is an example of the “light source holder” in the present invention.

  A projector 300 (see FIG. 1) according to the third embodiment includes a housing 303 and an LD holder 305 as shown in FIG. In the third embodiment, the housing 303 is made of a light absorbing resin, and the base members 4a to 4c and the LD holder 305 are made of a light transmissive resin.

  The outer surface 333 of the housing 303 does not have a protrusion as in the first embodiment, and is formed flat.

  The LD holder 305 includes an LD holding part 53 and welding parts 354a and 354b. Further, the LD holder 305 includes projecting portions 355a and 355b formed on the housing 303 side. Specifically, the LD holder 305 has protrusions 355a and 355b that protrude toward the housing 303 on the welded portions 354a and 354b, respectively. The protrusions 355a and 355b are formed to extend in the stacking direction (Y direction). The LD holder 305 is laser welded to the housing 303 at the front end surfaces of the protruding portions 355a and 355b.

  Specifically, the outer surface 333 of the housing 303 and the tips of the protrusions 355a and 355b of the LD holder 305 are in contact with each other. The LD holder 305 is laser welded to the housing 303 in a region (region A2) where the tips of the protrusions 355a and 355b abut against the housing 303.

  The LD holder 305 includes a recess 356 formed on the opposite side (Y2 direction side) from the housing 303 so as to correspond to the protrusions 355a and 355b. Specifically, the recess 356 extends in the stacking direction (extends in the Y1 direction) from the outer surface 305a side (Y2 direction side) of the LD holder 305, and the bottom portion 356a of the recess 356 is a portion other than the bottom portion 356 of the LD holder 305. It extends to a position closer to the outer surface 44 of the base member 4a than the outer surface 305a.

  Other configurations of the third embodiment are the same as those of the first embodiment.

  In the third embodiment, the following effects can be obtained.

  In the third embodiment, similarly to the first embodiment, a housing 303 made of light-absorbing resin and base members 4a to 4c made of light-transmitting resin are laminated on the outer surface 333 of the housing 303. And an LD holder 305 which is laminated on the outer surface 44 of the base members 4 a to 4 c and is made of a light transmissive resin. The base members 4 a to 4 c are laser welded to the LD holder 305 or the housing 303, and are attached to the housing 303. Projections 355a and 355b projecting toward the base members 4a to 4c are provided, and the LD holder 305 and the housing 303 are laser-welded at the projections 355a and 355b. Thereby, laser welding can be performed in a state where the housing 303, the base members 4a to 4c, and the LD holder 305 are laminated in three layers by the protruding portions 355a and 355b. As a result, misalignment of the stacked housing 303, base members 4a to 4c, and LD holder 305 can be prevented.

  In the third embodiment, as described above, the LD holder 305 is provided with the protruding portions 355a and 355b formed on the housing 303 side, and on the opposite side of the housing 303 so as to correspond to the protruding portions 355a and 355b. A formed recess 356 is provided. Thereby, since the thickness of the protrusions 355a and 355b of the LD holder 305 through which the laser light passes is reduced by the recess 356, the energy loss at the time of laser welding can be reduced as the thickness is reduced. As a result, laser welding can be performed efficiently.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first to third embodiments, an example in which the present invention is applied to a projector has been shown, but the present invention is not limited to this. For example, the present invention may be applied to a device other than a projector, such as a disk device.

  In the first to third embodiments, the example in which the housing, the base member that holds the collimator lens, and the LD holder that holds the LD are laser-welded is shown, but the present invention is not limited to this. The present invention may be applied to laser welding of a resin member other than the housing, the base member, and the LD.

  Moreover, although the example which provided two protrusion parts was shown in the said 1st-3rd embodiment, this invention is not limited to this. In the present invention, for example, one or more protrusions may be provided.

  Moreover, in the said 1st-3rd embodiment, although the example in which one of a housing and LD holder has a protrusion part was shown, this invention is not limited to this. In the present invention, both the housing and the LD holder may have the protruding portion. Further, when viewed from the stacking direction (outside of the housing), the housing and the LD holder may each have a protruding portion at a corresponding position. In this case, the tip of the protrusion of the housing and the tip of the protrusion of the LD holder come into contact with each other, and laser welding is performed at this contact portion.

  Moreover, in the said 1st-3rd embodiment, although the example which comprised the housing with the light absorptive member was shown, this invention is not limited to this. In the present invention, the housing may be formed of a light transmissive member. In this case, at least one of the LD holder and the base member is made of a light absorbing member. For example, a protrusion that protrudes from the outer surface of the housing to the LD holder side and abuts on the surface of the base member may be provided. In this case, laser welding of the housing and the base member is performed at the protruding portion.

  Moreover, in the said 1st-3rd embodiment, although the base member showed the example which has a through-hole, this invention is not limited to this. In the present invention, the base member may not have a through hole. In this case, the protrusion is disposed on the outer side (end side) of the base member.

  Moreover, in the said 1st-3rd embodiment, although the example comprised so that the thickness of LD holder might differ by LD holding | maintenance part and a welding part was shown, this invention is not limited to this. In the present invention, for example, the LD holding part and the weld part may be configured to have the same thickness.

  Moreover, in the said 1st-3rd embodiment, although the example which laser-welded the housing, the base member, and LD holder was each shown in two places, this invention is not limited to this. In the present invention, laser welding may be performed at one place or three or more places.

  Moreover, in the said 1st-3rd embodiment, although the example which made the protrusion part the cylinder shape was shown, this invention is not limited to this. In the present invention, for example, the protruding portion may have a quadrangular prism shape.

  Moreover, although the example which provided the recessed part in the light source holder was shown in the said 3rd Embodiment, this invention is not limited to this. In the present invention, the light source holder need not be provided with a recess.

3, 303 Housing 4a-4c, 204 Base member 5a-5c, 205, 305 LD holder (light source holder)
24 Scanning mirror (projection unit)
33, 333 Outer surface 34a, 34b, 355a, 355b Protruding part 42a-42c Collimating lens (lens)
43a, 43b Through-hole 44 Outer surface 51a-51c LD (light source)
53 LD holder (light source holder)
54a, 54b, 254a, 254b, 354a, 354b Welding part 91 Image 100, 200, 300 Projector 305a Outer surface 356 Concave part

Claims (9)

A light incident from a light source and a housing made of one of a light-transmitting resin or a light-absorbing resin;
A base member that is laminated on the outer surface of the housing, holds a lens irradiated with light from the light source, and is made of a light-transmitting resin or a light-absorbing resin;
A light source holder that is laminated on the outer surface of the base member, holds the light source, and is composed of the other of a light-transmitting resin or a light-absorbing resin,
A projection unit that projects an image based on light from the light source via the housing;
The base member is laser welded to the light source holder or the housing,
At least one of the light source holder or the housing has a protrusion that protrudes toward the base member, and the light source holder and the housing are laser-welded at the protrusion.   The projector according to claim 1, wherein the base member has an opening into which the protrusion is inserted. A plurality of the protrusions are provided,
The projector according to claim 2, wherein the opening of the base member includes a plurality of through holes into which the plurality of protrusions are respectively inserted.   The projector according to claim 1, wherein a height of the projecting portion is greater than a thickness of the base member in a direction in which the housing, the base member, and the light source holder are stacked.   The said light source holder contains the said protrusion part formed in the said housing side, and the recessed part formed in the opposite side to the said housing so as to correspond to the said protrusion part. Projector. The housing is made of a light absorbing resin,
The base member and the light source holder are made of a light transmissive resin,
The housing includes the protruding portion that protrudes toward the light source holder, and is laser-welded to the light source holder at the tip of the protruding portion and laser-welded to the base member in a region that contacts the base member. The projector according to any one of claims 1 to 5. The housing and the base member are made of a light absorbing resin,
The light source holder is made of a light transmissive resin,
The housing includes the protruding portion protruding toward the light source holder, and is laser-welded with the light source holder at the tip of the protruding portion,
The projector according to claim 1, wherein the light source holder is laser welded to the base member in a region where the light source holder is in contact with the base member.   The projector according to claim 1, wherein the light source holder includes a light source holding part having a first thickness and a welding part having a second thickness smaller than the first thickness. . A first resin member composed of one of a light-transmitting resin or a light-absorbing resin;
A second resin member that is laminated on the outer surface of the first resin member and is made of a light-transmitting resin or a light-absorbing resin;
A third resin member that is laminated on the outer surface of the second resin member and is composed of the other of the light-transmitting resin or the light-absorbing resin;
The second resin member is laser welded to the first resin member or the third resin member,
At least one of the first resin member or the third resin member has a protrusion that protrudes toward the second resin member, and the first resin member and the third resin member are laser-welded at the protrusion. Resin bonded body.

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