Optical member assembling method and vehicular lighting fixture

Abstract

To provide an optical member assembling method capable of suppressing a deviation from an ideal position of an optical member, and to provide a vehicular lighting fixture.SOLUTION: An optical member assembling method for assembling a shade 30 and a base member B includes: a positioning step for inserting a positioning pin P into a positioning hole part H to bring about a positioning state; a filling step for filling the positioning hole part H with an adhesive AD that hardens by the irradiation of light of a specific wavelength after the positioning step; a screw fastening step for, after the positioning step, inserting a screw SC into openings 33a and B4 of both of a first screw opening part 33 and a second screw opening part, and fastening the screw; a fine adjustment step for performing fine adjustment for the position of the shade 30 in a state where the screw fastening is performed in the screw fastening step; and a hardening step for, after the fine adjustment is performed for the position of the shade 30 in the fine adjustment step, hardening the adhesive AD by irradiating the adhesive AD with light of the specific wavelength.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a method for assembling an optical member and a vehicle lamp.

Background Art

[0002] Conventionally, it has been known that an optical member is displaced in the screw rotation direction by a rotational torque during screw fastening. Therefore, in addition to the screw fastening portion, it has been proposed to provide a protruding pin and a hole portion into which the protruding pin is inserted, and to position the optical member by the protruding pin and the hole portion (for example, Patent Document 1). Thereby, even if displacement in the rotational direction is about to occur, the displacement is restricted by the cooperation of the protruding pin and the hole portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, generally, there are some variations in dimensions among various products. For this reason, due to the dimensional variations, the optical member is likely to deviate from the ideal position. Furthermore, because of such dimensional variations, the size of the hole portion into which the protruding pin is inserted is designed to be slightly larger than the protruding pin. Therefore, during screw fastening, it is impossible to prevent rotational displacement corresponding to this dimensional difference, and for an optical member that requires high positional accuracy, even a dimensional difference may cause a problem of deviation from the ideal position.

[0005] The present disclosure has been made to solve such conventional problems, and an object thereof is to provide a method for assembling an optical member capable of suppressing deviation of the optical member from the ideal position, and a vehicle lamp.

Means for Solving the Problems

[0006] The optical member assembling method according to the present disclosure includes an optical member having a first positioning portion which is one of a positioning pin or a positioning hole portion, and a first screw opening portion into which a screw is inserted, and an object to which the optical member is to be attached, the object having a second positioning portion which is the other of the positioning pin or the positioning hole portion, and a second screw opening portion which is continuous with the first screw opening portion in a positioned state where the positioning pin is inserted into the positioning hole portion. The method is an optical member assembling method for assembling the optical member and the object to be attached, and includes a positioning step of inserting the positioning pin into the positioning hole portion to obtain the positioned state, a filling step of filling the positioning hole portion with an adhesive in which a photoinitiator is dispersed and which is cured by irradiation with light of a specific wavelength after obtaining the positioned state in the positioning step, a screwing step of inserting the screw into both openings of the first screw opening portion and the second screw opening portion and then screwing the screw after obtaining the positioned state in the positioning step, a fine adjustment step of finely adjusting the position of the optical member in a state where screwing is performed by the screwing step, and a curing step of irradiating the adhesive filled in the filling step with light of a specific wavelength to cure the adhesive after the position of the optical member is finely adjusted in the fine adjustment step.

[0007] In addition, a vehicle lamp according to the present disclosure includes an optical member having a first positioning portion which is one of a positioning pin or a positioning hole portion, and a first screw opening portion into which a screw is inserted, an object to which the optical member is to be attached, the object having a second positioning portion which is the other of the positioning pin or the positioning hole portion, and a second screw opening portion which is continuous with the first screw opening portion in a positioned state where the positioning pin is inserted into the positioning hole portion, the screw inserted in a fastened state into both the first screw opening portion and the second screw opening portion which are continuous in the positioned state, and an adhesive in which a photoinitiator is dispersed and which is cured by irradiation with light of a specific wavelength and which is filled in the positioning hole portion in a cured state in the positioned state.

Advantages of the Invention

[0008] According to the present disclosure, it is possible to provide a method for assembling an optical member capable of suppressing deviation from an ideal position of the optical member, and a vehicle lamp.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0010] Hereinafter, a vehicle lamp according to an embodiment of the present disclosure will be described. However, the present disclosure is not limited to the following embodiments and can be appropriately changed without departing from the gist of the present disclosure. Further, in the embodiments, there are some places where the illustration and description of some configurations are omitted. Regarding the details of the omitted technology, it goes without saying that known or well-known technologies are appropriately applied within the range not conflicting with the content described below.

[0011] FIG. 1 is a perspective view showing a vehicle lamp according to the first embodiment, and FIG. 2 is an exploded perspective view of FIG. 1.

[0012] The vehicle lamp 1 shown in Fig. 1 is used, for example, as a headlamp provided in the front of the vehicle. This vehicle lamp 1 is disposed in a lamp chamber formed by a housing and an outer lens (not shown). Such a vehicle lamp 1 is configured to include a light irradiation unit U and a base member (a component to be attached) B, as shown in Figs. 1 and 2. The base member B is a member that serves as a support portion for supporting the light irradiation unit U.

[0013] The light irradiation unit U is, for example, for forming a low beam light distribution, and includes a light source 10, a reflector 20, a shade (optical member) 30, and a lens 40.

[0014] The light source 10 emits light such as an LED (Light-Emitting Diode), and is placed on the upper surface of the base member B in a state of being mounted on a substrate or the like. Due to being placed on the upper surface of the base member B, the light source 10 emits light upward.

[0015] The reflector 20 has a reflecting surface based on a rotational ellipsoidal surface on its inner surface. The reflector 20 covers the upper part of the light source 10 and is arranged such that the open side of the rotational ellipsoidal surface faces the front of the vehicle. Therefore, the light emitted upward from the light source 10 is reflected by the reflector 20 and directed toward the front of the vehicle.

[0016] The shade 30 cuts a part of the light emitted from the light source 10 and reflected by the reflector 20. The upper end side of the shade 30 is bent slightly rearward to form a bent portion 30a. Further, the upper end of the bent portion 30a constitutes a cut portion 31 that cuts a part of the light. By the cut portion 31 cutting a part of the light, a cut-off line for the low beam is formed. Such a shade 30 is attached to the front surface of the base member B by screw fastening.

[0017] The lens 40 partially shields the light reflected by the reflector 20 with the shade 30 and emits it forward of the vehicle as a light distribution pattern with a cut-off line formed.

[0018] Here, as described above, since the shade 30 forms a cut-off line, it is necessary to accurately attach it to the base member B. That is, the shade 30 needs to be attached to the base member B at a predetermined ideal position. The vehicle lamp 1 according to the first embodiment includes an adhesive AD (see FIG. 3) and the like in addition to the screw SC and the spring member SP in order to achieve such attachment at the ideal position. Hereinafter, these configurations and the details of the shade 30 and the base member B will be described.

[0019] The shade 30 according to the first embodiment includes two first positioning portions 32 and one first screw opening 33. The two first positioning portions 32 and the one first screw opening 33 are both formed in a state where the vertical height is unified in the non-bending portion 30b excluding the bending portion 30a.

[0020] The two first positioning portions 32 are constituted by one of a positioning pin P and a positioning hole portion H, and in the first embodiment, they are constituted by the positioning hole portion H. The two positioning hole portions H are provided on both sides of the first screw opening 33 so as to sandwich the one first screw opening 33. The two positioning hole portions H may be two circular holes, or one may be a circular hole and the other may be an elongated hole. Further, if possible, the positioning hole portion H may be a polygonal shape or the like. In the present embodiment, the two positioning hole portions H are both elongated holes extending in the vertical direction.

[0021] One first screw opening 33 is formed at the central portion in the left - right direction, sandwiched between two positioning hole portions H. The first screw opening 33 is for inserting the threaded portion SC1 of the screw SC. The opening 33a of this first screw opening 33 has a diameter slightly larger than that of the threaded portion SC1. In this embodiment, the first screw opening 33 is an opening that is long in the up - down direction, similar to the positioning hole portion H.

[0022] The base member B is an object to which the shade 30 is attached, and includes two second positioning portions B1 and one second screw opening B2. The two second positioning portions B1 and one second screw opening B2 are formed on a pedestal portion B3 provided on the front surface of the base member B and extending in the left - right direction, with their heights in the up - down direction unified.

[0023] Note that the base member B according to the first embodiment is made of metal. Further, a plurality of heat - dissipating fins made of plate materials are formed at the rear of the base member B, and it functions as a heat sink.

[0024] The two second positioning portions B1 are constituted by the other of the positioning pin P and the positioning hole portion H. Since the first positioning portion 32 is the positioning hole portion H in the first embodiment, the second positioning portion B1 is constituted by the positioning pin P. When the first positioning portion 32 is the positioning pin P, the second positioning portion B1 is constituted by the positioning hole portion H. The two positioning pins P are provided on both sides of the second screw opening B2 so as to sandwich one second screw opening B2. The diameter of the positioning pin P is made smaller than that of the positioning hole portion H so that there is a slight gap with respect to the positioning hole portion H. In particular, due to the fact that the positioning hole portion H is a long hole extending in the up - down direction, the diameter of the positioning pin P is made such that there is a slight gap in the left - right direction with respect to the positioning hole portion H. Note that the positioning pin P is assumed to be a substantially conical shape that tapers, but it is not limited to this, and it may be a cylindrical shape that does not taper, or if possible, a polygonal column shape, a polygonal pyramid shape, etc.

[0025] One second screw opening B2 is formed at the center in the left - right direction of the pedestal portion B3. The second screw opening B2 is for inserting the threaded portion SC1 of the screw SC. This second screw opening B2 has a positional relationship that can be continuous with the first screw opening 33 in a positioning state where the positioning pin P is inserted into the positioning hole portion H. The opening B4 of this second screw opening B2 has a diameter slightly smaller than that of the threaded portion SC1.

[0026] The screw SC is rotationally inserted into both openings 33a and B4 in a positioned state where the opening 33a of the first screw opening 33 and the opening B4 of the second screw opening B2 are continuous. By being completely rotationally inserted, the screw SC fastens the first screw opening 33 (shade 30) and the second screw opening B2 (base member B).

[0027] The spring member SP is interposed between the screw head SC2 and the shade 30 when the screw SC is in a fastened state. In the first embodiment, the spring member SP is constituted by an annular wave washer having a curved portion, and exerts an action of pressing the shade 30 against the pedestal portion B3 of the base member B in the fastened state of the screw SC.

[0028] FIG. 3 is a sectional view taken along line A-A shown in FIG. 1. In the example shown in FIG. 3, two positioning pins P are inserted into two positioning holes H so that the shade 30 and the base member B are in a positioned state. The second screw opening B2 (see FIG. 2) of the base member B surrounds the opening B4 and has a circular protrusion B5 that protrudes forward on the side of the screw head SC2 when the screw SC is tightened. The circular protrusion B5 is structured to fit into the opening 33a of the first screw opening 33 in the positioned state, and is located inside the spring member SP and contacts the screw head SC2 when the screw is tightened. In particular, since the screw SC is tightened when the screw head SC2 contacts the circular protrusion B5, the protruding amount of the circular protrusion B5 from the front surface of the shade 30 is made smaller than the thickness (natural length) of the spring member SP in the free state. In this embodiment, the plate thickness of the spring member SP is smaller than at least the protruding amount of the circular protrusion B5 from the base member B in relation to exerting a suitable spring force. Also, the protruding amount of the circular protrusion B5 from the base member B is larger than at least the thickness of the spring member SP (thickness in the compressed state) after fastening.

[0029] Also, an adhesive AD is filled between the positioning pin P and the positioning hole H. This adhesive AD is a photocurable adhesive in which a photoinitiator (photopolymerization initiator) is dispersed and cured by irradiation with light of a specific wavelength. Such an adhesive AD is filled in a cured state between the positioning pin P and the positioning hole H.

[0030] Note that the gap L1 between the positioning pin P and the positioning hole H is preferably made as small as possible to exert a positioning effect. Also, the gap L1 is made smaller than the gap L3 between the circular protrusion B5 and the opening 33a of the first screw opening 33. In particular, when both the positioning hole H and the first screw opening 33 are elongated holes extending in the vertical direction, the vertical gap L1 is made smaller than the vertical gap L3, and the horizontal gap L1 is made smaller than the horizontal gap L3.

[0031] Next, a method for assembling the optical member according to the first embodiment will be described. The method for assembling the optical member is performed in the order of a positioning step, a filling step, a screw tightening step, a fine adjustment step, and a curing step. It should be noted that all of the following steps are assumed to be performed manually by an operator, but possible steps may be performed by a device or the like.

[0032] First, the operator inserts two positioning pins P into the two positioning hole portions H to set the positioning state (positioning step). As a result, the opening 33a of the first screw opening portion 33 and the opening B4 of the second screw opening portion B2 are continuous. In this state, the operator fills the positioning hole portion H into which the positioning pin P is inserted with a photocurable adhesive AD (filling step).

[0033] Next, the operator arranges the spring member SP around the circular protrusion B5 and rotationally inserts the screw SC to set the fastening state (screw tightening step). As a result, the peripheral portion of the circular protrusion B5 of the shade 30 is pressed against the pedestal portion B3 of the base member B by the elastic force of the spring member SP. In this case, in order to enable fine adjustment of the optical member, it is preferable not to completely crush the spring member SP.

[0034] Next, the operator finely adjusts the position of the shade 30 in which the screw SC is tightened to an ideal position (fine adjustment step). Here, in the screw tightening step, the screw SC is rotationally inserted into the openings 33a and B4. Therefore, due to the rotational torque during the insertion of the screw SC, the shade 30 rotates, and at least for the clearance L1, it deviates from the ideal position. In particular, the clearance L1 is preferably small from the viewpoint of positioning accuracy, but depending on the product, the clearance L1 may be designed to be relatively large. Also, when both of the positioning hole portions H are elongated holes as in the present embodiment, the clearance L1 tends to be large in at least one direction. In such a case, the position of the shade 30 may deviate from the ideal position relatively largely due to the rotational torque. In this fine adjustment step, the operator finely adjusts the rotational position and the like of the shade 30 deviated from the ideal position to the ideal position. Note that the operator adjusts the shade 30 to the ideal position against the force by which the shade 30 is pressed against the pedestal portion B3 by the spring member SP.

[0035] Next, the operator irradiates the adhesive AD with light of a specific wavelength to cure the adhesive AD (curing step). By this curing step, the position of the shade 30 set to the ideal position is firmly fixed.

[0036] In the first embodiment, a filling step of filling the adhesive AD is performed immediately after the positioning step. However, particularly, the filling step is not limited to being immediately after the positioning step as long as it is after the positioning step and before the curing step. That is, the filling step may be performed, for example, after the screw tightening step, or may be performed after the fine adjustment step if possible.

[0037] In this way, in the method of assembling the optical member according to the first embodiment, screw tightening is performed by the screw SC after positioning, and then, after the shade 30 is finely adjusted to the ideal position, the adhesive AD filled in the positioning hole portion H is cured. Therefore, a clearance for the positioning pin P to move after the curing of the adhesive AD is not provided, and the ideal position is easily maintained. Accordingly, deviation of the optical member from the ideal position can be suppressed.

[0038] Also, according to the vehicle lamp 1 according to the first embodiment, the adhesive AD that cures by light cures relatively instantaneously and hard by irradiation with light of a specific wavelength as compared with other viscous adhesives. Therefore, the adhesive AD that has been filled in the positioning hole H in a cured state performs strong position fixing so as not to provide a gap for the positioning pin P to move within the positioning hole H. Here, since such strong position fixing is usually performed at the ideal position and not at the wrong position, it is possible to easily hold the ideal position and suppress the deviation of the optical member from the ideal position.

[0039] Furthermore, since the vehicle lamp 1 of the first embodiment includes the circular protrusion B5 that protrudes from the front surface of the shade 30, when tightening the screw, the screw head SC2 contacts the circular protrusion B5 and the completion of fastening becomes clear. Furthermore, the amount of protrusion of the circular protrusion B5 from the front surface of the shade 30 is made smaller than the thickness of the spring member SP in the free state. For this reason, when the fastening is completed, the spring member SP can exert an action of pressing the shade 30 toward the base portion B side, and a suitable fastening completed state can be achieved.

[0040] Also, in the vehicle lamp 1 of the first embodiment, the positioning hole H of the shade 30 is a long hole extending in the vertical direction. Here, the shade 30 needs to form a cut-off line at an accurate position in the light distribution pattern, and the position adjustment in the height direction is the most important. Therefore, by making the positioning hole H a long hole extending in the vertical direction, it is easy to fill the gap in the left-right direction and omit the alignment in the left-right direction and the rotational direction, and the position adjustment in the height direction can be facilitated.

[0041] Next, a second embodiment of the present disclosure will be described. The method of assembling the optical member and the vehicle lamp according to the second embodiment are different in some configurations from those of the first embodiment. Hereinafter, the differences from the first embodiment will be described.

[0042] FIG. 4 is a cross-sectional view showing details of the vehicle lamp 2 according to the second embodiment. As shown in FIG. 4, in the second embodiment, at least one of the two positioning hole portions H has a chamfered portion H1 whose part is chamfered. The chamfered portion H1 is formed by chamfering the surface (front surface) on the tip side of the positioning pin P when the positioning pin P is inserted into the positioning hole portion H.

[0043] Here, chamfering is generally performed on the insertion side surface (rear surface) so that the positioning pin P can be easily inserted into the positioning hole portion H. In the vehicle lamp 2 according to the second embodiment, for the positioning hole portion H, chamfering is performed on the front surface which is the opposite surface of the insertion side surface, and the chamfered portion H1 is formed.

[0044] Note that if the chamfered portion H1 is formed on the surface on the tip side of the positioning pin P in the second embodiment, the insertion side surface may be further chamfered.

[0045] Next, a method for assembling the optical member according to the second embodiment will be described. The method for assembling the optical member is performed in the order of a positioning step, a filling step, a screw tightening step, a fine adjustment step, and a curing step. Note that the following steps are performed by an operator, but it is the same as in the first embodiment that possible steps may be performed by a device or the like.

[0046] First, the operator prepares the shade 30 in which the chamfered portion H1 is formed in the positioning hole portion H. As described above, the chamfered portion H1 is formed on the surface on the tip side of the positioning pin P after the positioning step.

[0047] Thereafter, the positioning step, the filling step, the screw tightening step, and the fine adjustment step are performed in the same manner as in the first embodiment. Next, the operator irradiates the adhesive AD with light of a specific wavelength to cure the adhesive AD (curing step). Here, in the second embodiment, the chamfered portion H1 is formed in the positioning hole portion H. Therefore, when irradiating light of a specific wavelength to the innermost part of the adhesive AD, a wide irradiation range (irradiation angle) can be ensured, and the adhesive AD can be cured more appropriately.

[0048] FIG. 5 is an enlarged cross-sectional view showing the curing process according to the second embodiment, where (a) shows an example without the chamfered portion H1, and (b) shows an example with the chamfered portion H1. As shown in FIG. 5(a), when the positioning hole portion H does not have the chamfered portion H1, it is necessary to irradiate light of a specific wavelength using the narrow gap L1 between the positioning hole portion H and the positioning pin P. Therefore, the range of the appropriate irradiation angle of the light for curing the adhesive AD located at the innermost part is only the angular range θ1 corresponding to the gap L1.

[0049] On the other hand, as shown in FIG. 5(b), when the positioning hole portion H has the chamfered portion H1, the appropriate irradiation angle of the light for curing the adhesive AD located at the innermost part becomes wider by an amount corresponding to the size and chamfer angle of the chamfered portion H1, and is widened to θ2 (>θ1). Therefore, the adhesive AD can be cured more appropriately.

[0050] Thus, according to the method of assembling the optical member according to the second embodiment, similarly to the first embodiment, the deviation from the ideal position of the optical member can be suppressed.

[0051] Also, according to the vehicle lamp 2 according to the second embodiment, similarly to the first embodiment, it is possible to suppress the deviation from the ideal position of the optical member and make it easy to hold the ideal position. In addition, a suitable fastening completed state can be achieved, and the position adjustment in the height direction can be facilitated.

[0052] Furthermore, according to the second embodiment, the surface of the positioning hole portion H on the tip side where the positioning pin P is inserted is chamfered. Therefore, the vehicle lamp 2 can increase the irradiation angle of the light for curing the adhesive AD located at the innermost part, make it easier to irradiate the adhesive AD with light of a specific wavelength, and appropriately cure the adhesive AD.

[0053] Next, a third embodiment of the present disclosure will be described. The method of assembling the optical member and the vehicle lamp according to the third embodiment are partially different from those of the first embodiment. Hereinafter, the differences from the first embodiment will be described.

[0054] FIG. 6 is a cross-sectional view showing details of the vehicle lamp 3 according to the third embodiment. In the example shown in FIG. 6, the shade 30 is formed by performing aluminum vapor deposition on a transparent resin. The transparent resin is not particularly limited in type, and examples thereof include polycarbonate and acrylic. In the third embodiment, the shade 30 is subjected to aluminum vapor deposition at least at the cut portion 31 (see FIG. 2). Further, the shade 30 according to the third embodiment is made into a transparent portion 34 without performing aluminum vapor deposition on at least one of the two positioning hole portions H.

[0055] Next, a method for assembling the optical member according to the third embodiment will be described. The method for assembling the optical member is performed in the order of a manufacturing process, a positioning process, a filling process, a screw tightening process, a fine adjustment process, and a curing process. It should be noted that the following processes are performed by an operator, but it is the same as in the first embodiment that possible processes may be performed by a device or the like.

[0056] First, the operator manufactures the shade 30 (manufacturing process). At this time, the operator makes the transparent portion 34 without performing aluminum vapor deposition on at least one of the two positioning hole portions H.

[0057] Thereafter, the positioning process, the filling process, the screw tightening process, and the fine adjustment process are performed in the same manner as in the first embodiment. Next, the operator irradiates the adhesive AD with light of a specific wavelength to cure the adhesive AD (curing process). Here, in the third embodiment, the positioning hole portion H is the transparent portion 34. Therefore, when irradiating the adhesive AD with light of a specific wavelength up to the deep portion of the adhesive AD, a wide irradiation range (irradiation angle) can be ensured, and the adhesive AD can be cured more appropriately.

[0058] FIG. 7 is an enlarged cross-sectional view showing the curing process according to the third embodiment, where (a) shows an example in which the positioning hole portion H is not the transparent portion 34, and (b) shows an example in which the positioning hole portion H is the transparent portion 34. As shown in FIG. 7(a), when the positioning hole portion H is not the transparent portion 34, it is necessary to irradiate light of a specific wavelength using the narrow gap L1 between the positioning hole portion H and the positioning pin P. Therefore, the range of the proper irradiation angle of the light for curing the adhesive AD located at the innermost part is only the angular range θ1 corresponding to the gap L1.

[0059] On the other hand, as shown in FIG. 7(b), when the positioning hole portion H is the transparent portion 34, the proper irradiation angle of the light for curing the adhesive AD located at the innermost part becomes wider by an amount corresponding to the width of the transparent portion 34, and is widened to θ3 (>θ1). Therefore, the adhesive AD can be cured more appropriately.

[0060] Here, in the third embodiment, when the shade 30 is formed by vapor-depositing aluminum on polycarbonate or acrylic, the irradiated light is visible light, and the adhesive AD is assumed to be cured by the visible light. Polycarbonate and acrylic are likely to absorb UV (Ultraviolet). Therefore, when polycarbonate or acrylic is used as the material of the shade 30, it becomes difficult to cure even if a UV-curable adhesive AD is used. Thus, when polycarbonate or acrylic is used as the material of the shade 30, the operator uses a visible-light-curable adhesive AD and irradiates visible light in the curing process.

[0061] In this way, according to the method of assembling the optical member according to the third embodiment, similar to the first embodiment, the deviation from the ideal position of the optical member can be suppressed.

[0062] Furthermore, according to the third embodiment, since the shade 30 is aluminized while the positioning hole portion H is a transparent portion 34 that is not aluminized, light of a specific wavelength can be irradiated onto the adhesive AD through the positioning hole portion H. Thereby, it becomes easier to irradiate the adhesive AD with light of a specific wavelength, and the adhesive AD can be appropriately cured.

[0063] Also, when polycarbonate or acrylic is used as the material of the shade 30, the adhesive AD that cures by visible light is filled in the positioning hole portion H, and the adhesive AD is cured by irradiation with visible light. Thereby, even if parts are manufactured using a transparent member such as polycarbonate or acrylic that has a property of easily absorbing UV, it is possible to appropriately cure the adhesive AD. Therefore, even if parts are manufactured using a resin with high versatility as a transparent member such as polycarbonate or acrylic, it is possible to appropriately cure the adhesive AD and suppress displacement from the ideal position of the optical member.

[0064] Also, according to the vehicle lamp 3 according to the third embodiment, similar to the first embodiment, it is possible to easily hold the ideal position and suppress displacement from the ideal position of the optical member. Also, a suitable fastening completion state can be achieved, and it is possible to facilitate position adjustment in the height direction. Furthermore, according to the third embodiment, it becomes easier to irradiate the adhesive AD with light of a specific wavelength, and even if parts are manufactured using a resin with high versatility as a transparent member such as polycarbonate or acrylic, it is possible to appropriately cure the adhesive AD.

[0065] As described above, the present disclosure has been described based on the embodiments. However, the present disclosure is not limited to the above embodiments, and modifications may be made or known and well-known technologies may be combined without departing from the spirit of the present disclosure.

[0066] For example, in the above embodiment, there are two positioning pins P and two positioning hole portions H (i.e., the first positioning portion 32 and the second positioning portion B1) respectively, but it is not particularly limited thereto, and there may be one or three or more. Similarly, the first screw opening portion 33 and the second screw opening portion B2 are each one, but it is not particularly limited thereto, and there may be two or more.

[0067] Also, in the above embodiment, the shade 30 has the positioning hole portion H and the base member B has the positioning pin P, but it is not particularly limited thereto, and the shade 30 may have the positioning pin P and the base member B may have the positioning hole portion H.

[0068] Furthermore, the above embodiment shows the shade 30 as an example of an optical member and the base member B as an example of a component to be attached, but the optical member is not particularly limited to the shade 30, and the component to be attached is not limited to the base member B either. In particular, the optical member may be a reflector 20, a lens 40, a substrate on which a light source 10 is mounted, etc., and the present disclosure may be applied to these and the like.

[0069] Also, the third embodiment exemplifies a shade 30 obtained by subjecting a transparent resin to aluminum vapor deposition. Here, the reflector 20 can also be similarly made of a transparent resin, and for example, it is also possible to perform aluminum vapor deposition only on the reflecting surface. Therefore, for example, when the optical member is the reflector 20, the disclosure content in the third embodiment can also be applied.

[0070] Furthermore, the third embodiment indicates that a visible light-curable adhesive AD is used when the transparent resin is polycarbonate or acrylic. This technical content is applicable even when the shade 30 (optical member) is not aluminized. That is, this disclosure content is also applicable when screwing an optical member entirely formed of a transparent resin like a lens. In this case, it is clear that the lens entirely formed of polycarbonate or acrylic has the positioning hole portion H in an exposed state of the transparent resin and is the transparent portion 34. By using the visible light-curable adhesive AD, a wide irradiation angle can be ensured and the adhesive AD can be cured more appropriately.

[0071] In addition, the third embodiment shows an example where the shade 30 (optical member) is manufactured from polycarbonate or acrylic. However, it is not limited to this, and the base member B (the component to be attached) side may be manufactured from polycarbonate or acrylic and have the positioning hole portion H. Also in this case, by using the visible light-curable adhesive AD, a wide irradiation angle can be ensured and the adhesive AD can be cured more appropriately.

[0072] Furthermore, in the above embodiment, the transparent resin may have some turbidity or color within a range that does not affect curing.

[0073] Also, in the above embodiment, the vehicle lamps 1 to 3 are described by taking the headlamp as an example. However, this disclosure is not particularly limited to the headlamp and may be applied to other vehicle lamps.

[0074] In addition, in the above embodiment, the adhesive AD is a light-curable type. However, as long as it has a light-curing function, a combined type having further functions such as heat-curing, anaerobic-curing, and moisture-curing may also be adopted.

[0075] Furthermore, in the above-described embodiment, the spring member SP is constituted by an annular wave washer having a curved portion, but it is not particularly limited thereto, and for example, a leaf spring or a coil spring may be used as long as possible. Further, the spring member SP is not limited to a metal spring, and a rubber material or the like may be used as long as it exhibits an elastic effect.

Explanation of Reference Numerals

[0076] 1 to 3: Vehicle lamps 30: Shade (optical member) 32: First positioning portion 33: First screw opening 33a: Opening 34: Transparent portion AD: Adhesive B: Base member (component to be attached) B1: Second positioning portion B2: Second screw opening B4: Opening B5: Circular protrusion H: Positioning hole portion H1: Chamfered portion P: Positioning pin SC: Screw SC2: Screw head SP: Spring member

Claims

1. An optical member having a first positioning portion which is one of a positioning pin or a positioning hole portion, and a first screw opening into which a screw is inserted, and an object to which the optical member is to be attached, the object having a second positioning portion which is the other of the positioning pin or the positioning hole portion, and a second screw opening which can be continuous with the first screw opening in a positioned state where the positioning pin is inserted into the positioning hole portion, the method for assembling the optical member comprising assembling: A positioning step of inserting the positioning pin into the positioning hole portion to bring it into the positioned state; A filling step of filling the positioning hole portion with an adhesive in which a photoinitiator is dispersed and which cures by irradiation with light of a specific wavelength after bringing it into the positioned state in the positioning step; A screw tightening step of inserting the screw into both openings of the first screw opening and the second screw opening and then tightening the screw after bringing it into the positioned state in the positioning step; A fine adjustment step of finely adjusting the position of the optical member in a state where screw tightening has been performed by the screw tightening step; A curing step of irradiating the adhesive filled in the filling step with light of a specific wavelength to cure the adhesive after the position of the optical member has been finely adjusted in the fine adjustment step; A method for assembling an optical member, characterized by comprising the above steps.

2. Before the positioning step, there is a manufacturing step of manufacturing the optical member by performing aluminum vapor deposition on a transparency resin provided with the positioning hole portion, In the manufacturing step, the positioning hole portion is a transparent portion in an exposed state of the transparency resin without aluminum vapor deposition. The method for assembling an optical member according to claim 1, characterized by the above.

3. Before the positioning step, there is a manufacturing step of manufacturing a component having the positioning hole portion among the optical member and the component to be attached with a transparency resin composed of polycarbonate or acrylic, In the manufacturing step, at least the positioning hole portion is a transparent portion in an exposed state of the transparency resin, In the filling step, an adhesive in which a photoinitiator is dispersed and which cures by irradiation with visible light is filled, In the curing step, visible light is irradiated. The method for assembling an optical member according to claim 1, characterized by the above.

4. An optical member having a first positioning portion which is one of a positioning pin or a positioning hole portion, and a first screw opening into which a screw is inserted, A component to which the optical member is to be attached, having a second positioning portion which is the other of the positioning pin or the positioning hole portion, and a second screw opening portion continuous with the first screw opening portion in a positioned state where the positioning pin is inserted into the positioning hole portion. The screw inserted in a fastened state into both the first screw opening portion and the second screw opening portion that are continuous in the positioned state. An adhesive in which a photoinitiator is dispersed and which cures upon irradiation with light of a specific wavelength and is filled in a cured state in the positioning hole portion in the positioned state. A vehicle lamp characterized by comprising the above.

5. The optical member has the positioning hole portion. In the positioning hole portion, a part of the surface on the tip side of the positioning pin when the positioning pin is inserted is chamfered. The vehicle lamp according to claim 4, characterized by the above.

6. The optical member has the positioning hole portion and is obtained by performing aluminum vapor deposition on a transparent resin. The positioning hole portion is a transparent portion in a state where the transparent resin is exposed without aluminum vapor deposition. The vehicle lamp according to claim 4, characterized by the above.

7. Further comprising a spring member interposed between the screw head of the screw and the optical member. The second screw opening portion has a circular protrusion surrounding the opening and protruding toward the screw head side. The circular protrusion protrudes toward the screw head side more than the optical member, and the protruding amount is smaller than the thickness of the spring member in a free state. The vehicle lamp according to claim 4, characterized by the above.

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