Lens

Abstract

The inner lens (14) has a first lens section (141) and a second lens section (142) divided in the longitudinal direction, and the first lens section (141) and the second lens section (142) are bonded to each other.

Description

Technical Field

[0001] The present disclosure relates to a long lens disposed in a lamp chamber of a vehicle lamp. Background Art

[0002] Patent Document 1 discloses a vehicle lamp including a long turn signal lamp. The turn signal lamp includes a long inner lens.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-5496 Summary of the invention

[0006] Problems to be solved by the invention

[0007] When such a long inner lens is injection-molded, a mold corresponding to the shape of the inner lens is required, which makes the mold large and difficult to mold.

[0008] The present disclosure provides a simple method for forming a long lens disposed in a lamp chamber of a vehicle lamp.

[0009] Means used to solve problems

[0010] A lens according to one embodiment of the present disclosure is a long lens disposed in a lamp chamber of a vehicle lamp.

[0011] The lens includes a first lens portion and a second lens portion divided in a longitudinal direction.

[0012] The first lens portion is bonded to the second lens portion.

[0013] Effects of the Invention

[0014] According to the present disclosure, it is possible to easily form a long lens to be arranged in a lamp chamber of a vehicle lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The configuration of the vehicle lamp according to the present embodiment will be exemplified.

[0016] Figure 2 Observe from the direction of the arrow Figure 1 The configuration of the cross section along line 2-2 in FIG. 2 is exemplified.

[0017] Figure 3 right Figure 1 The structure of the inner lens of the vehicle lamp is exemplified.

[0018] Figure 4 right Figure 1Another example of the structure of the inner lens of the vehicle lamp is shown.

[0019] Figure 5 right Figure 1 Another example of the structure of the inner lens of the vehicle lamp is shown.

[0020] Figure 6 right Figure 1 Another example of the structure of the inner lens of the vehicle lamp is shown.

[0021] Figure 7 right Figure 1 Another example of the structure of the inner lens of the vehicle lamp is shown.

[0022] Figure 8 Another example of the structure of the inner lens is shown.

[0023] Fig. 9 Observe from the direction of the arrow Figure 8 The configuration of the cross section along line 9-9 in FIG. 1 is exemplified.

[0024] Fig.10 Another example of the configuration of the vehicle lamp according to the present embodiment will be described. DETAILED DESCRIPTION

[0025] Hereinafter, the embodiments of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, arrow U indicates the upward direction of the illustrated structure. Arrow D indicates the downward direction of the illustrated structure. Arrow F indicates the front direction of the illustrated structure. Arrow B indicates the rear direction of the illustrated structure. Arrow R indicates the right direction of the illustrated structure. Arrow L indicates the left direction of the illustrated structure. These directions are for Figure 1 The relative directions set for the vehicle lamp 10 shown in the figure are such that the irradiation direction of the light of the vehicle lamp 10 is defined as the front direction.

[0026] Figure 1 and Figure 2 The configuration of a vehicle lamp 10 according to the present embodiment is shown. The vehicle lamp 10 is, for example, a tail lamp or a rear combination lamp mounted on the rear of a vehicle. The vehicle lamp 10 is, for example, arranged along the vehicle width direction (substantially horizontal direction) between a right headlamp and a left headlamp mounted on the rear of a vehicle.

[0027] like Figure 2 As shown, the vehicle lamp 10 includes a lamp body 11 and an outer lens 12. The lamp body 11 has an opening in the front of the lamp. The outer lens 12 is formed to cover the opening of the lamp body 11. The lamp body 11 and the outer lens 12 form a lamp chamber S. The vehicle lamp 10 further includes a light source unit 13 and an inner lens 14. The light source unit 13 and the inner lens 14 are arranged in the lamp chamber S.

[0028] The light source unit 13 includes a plurality of light sources 131 and a plurality of base members 132. The plurality of light sources 131 are arranged at predetermined intervals along the length direction of the inner lens 14. Each light source 131 irradiates light toward the inner lens 14 in a direction orthogonal to the length direction of the inner lens 14. As the light source 131, semiconductor light emitting elements such as LED (Light Emitting Diode), LD (Laser Diode), EL (Electro Luminescence) elements, light bulbs, incandescent lamps (halogen lamps), discharge lamps, etc. can be used. A corresponding light source 131 is mounted on each base member 132. In addition, the plurality of base members 132 may be integrated, and the plurality of light sources 131 may be arranged at predetermined intervals on one base member 132. In addition, although not shown in the figure, a substrate (PCB (printed circuit board), FPC (flexible circuit board), etc.) not shown in the figure is provided on the back side of the light source 131.

[0029] The inner lens 14 is configured to emit light emitted from the plurality of light sources 131 and incident on the incident surface 14a from the emission surface 14b toward the outer lens 12. The inner lens 14 is formed of a light-transmitting material, such as a resin material such as acrylic acid or polycarbonate. For example, the total light transmittance of the inner lens 14 is 90% or more. In addition, the inner lens 14 may include a diffusing agent. Examples of the diffusing agent include silicon dioxide, calcium carbonate, barium sulfate, silicon microparticles, PS microparticles, and the like.

[0030] The inner lens 14 has a protrusion (not shown) and can be supported and fixed to the lamp body 11 via the protrusion. Alternatively, the inner lens 14 can be fixed to the lamp body 11 via a base member (not shown).

[0031] like Figure 1 As shown, the inner lens 14 is a long lens extending in the left-right direction when the vehicle lamp 10 is viewed from the front (the side from which light is emitted). For example, the inner lens 14 has a length of approximately one-third or more of the width of the vehicle on which the vehicle lamp 10 is mounted, and is arranged in the width direction of the vehicle.

[0032] The inner lens 14 includes a first lens portion 141 and a second lens portion 142 which are divided in the length direction. The first lens portion 141 and the second lens portion 142 are assembled and integrated after being formed separately. Figure 3 As shown, an end portion 1411 in the longitudinal direction of the first lens portion 141 and an end portion 1421 in the longitudinal direction of the second lens portion 142 are fitted together and bonded together by the bonding portion 15 .

[0033] In this example, the end 1411 of the first lens portion 141 has a concavo-convex shape, and the end 1421 of the second lens portion 142 has a concavo-convex shape. Specifically, the end 1411 of the first lens portion 141 has a first convex portion 1411A and a first concave portion 1411B. The first convex portion 1411A extends in the length direction toward the second lens portion 142 than the first concave portion 1411B. The end 1421 of the second lens portion 142 has a second convex portion 1421A and a second concave portion 1421B. The second convex portion 1421A extends in the length direction toward the first lens portion 141 than the second concave portion 1421B. The first convex portion 1411A of the first lens portion 141 is fitted with the second concave portion 1421B of the second lens portion 142, and the second convex portion 1421A of the second lens portion 142 is fitted with the first concave portion 1411B of the first lens portion 141.

[0034] When the first lens portion 141 and the second lens portion 142 are fitted, a gap is formed at the fitting portion between the first lens portion 141 and the second lens portion 142. In this example, a gap is formed between the first convex portion 1411A and the second concave portion 1421B, and a gap is formed between the first concave portion 1411B and the second convex portion 1421A.

[0035] Specifically, the surface 1411A1 of the first convex portion 1411A facing the second concave portion 1421B and the surface 1421B1 of the second concave portion 1421B facing the first convex portion 1411A are spaced apart along the length direction by a predetermined distance D. The surface 1411B1 of the first concave portion 1411B facing the second convex portion 1421A and the surface 1421A1 of the second convex portion 1421A facing the first concave portion 1411B are spaced apart along the length direction by a predetermined distance D. The predetermined distance D is, for example, 5 mm or less, preferably 0.5 mm or less.

[0036] Furthermore, the gap formed between first convex portion 1411A and second concave portion 1421B and the gap formed between first concave portion 1411B and second convex portion 1421A are not connected. Specifically, a portion of surface 1411C connecting surface 1411A1 and surface 1411B1 contacts a portion of surface 1421C connecting surface 1421A1 and surface 1421B1.

[0037] As the adhesive portion 15, for example, an adhesive sheet 151 having an adhesive function on both sides is used. For example, before assembling the first lens portion 141 and the second lens portion 142, the adhesive sheet 151 is attached to one of the first lens portion 141 or the second lens portion 142, and then the first lens portion 141 and the second lens portion 142 are interlocked, whereby the adhesive sheet 151 is naturally attached to the other of the first lens portion 141 and the second lens portion 142. The first lens portion 141 and the second lens portion 142 are interlocked, whereby the adhesive sheet 151 is filled in the gap formed in the interlocking portion between the first lens portion 141 and the second lens portion 142. In addition, vacuum bonding or an autoclave may be used for bonding.

[0038] In this example, the adhesive sheet 151 is disposed between the first convex portion 1411A of the first lens portion 141 and the second concave portion 1421B of the second lens portion 142, and fills the gap between the first convex portion 1411A and the second concave portion 1421B. In other words, in the fitting portion between the first lens portion 141 and the second lens portion 142, the gap on a portion of the emitting surface 14b side of the inner lens 14 is filled with the adhesive sheet 151.

[0039] In addition, the adhesive sheet 151 may be disposed between the first concave portion 1411B of the first lens portion 141 and the second convex portion 1421A of the second lens portion 142, and fill the gap between the first concave portion 1411B and the second convex portion 1421A. Alternatively, the adhesive sheet 151 may be disposed only between the first concave portion 1411B of the first lens portion 141 and the second convex portion 1421A of the second lens portion 142, and fill the gap between the first concave portion 1411B and the second convex portion 1421A.

[0040] The adhesive sheet 151 is made of a light-transmitting material such as acrylic, silicone, or epoxy. For example, the total light transmittance of the adhesive sheet 151 is greater than 90%. The adhesive sheet 151 can have the same total light transmittance as the inner lens 14. The expression "the total light transmittances are of the same degree" used in this specification is not limited to the case where the mutual total light transmittances are the same, but also includes the case where the mutual total light transmittances are similar. In addition, when ((total light transmittance of the inner lens 14) - (total light transmittance of the adhesive sheet 151)) / (total light transmittance of the inner lens 14) is within plus or minus 10%, the mutual total light transmittances are said to be similar.

[0041] The adhesive sheet 151 may contain a diffusing agent. Examples of the diffusing agent include silicon dioxide, calcium carbonate, barium sulfate, silicon particles, PS particles, and the like. The haze value (Haze) of the adhesive sheet 151 is preferably the same as that of the inner lens 14. The expression "the haze values ​​are of the same degree" used in this specification is not limited to the case where the total haze values ​​are the same, but also includes the case where the haze values ​​are similar. In addition, when ((haze value of inner lens 14) - (haze value of adhesive sheet 151)) / (haze value of inner lens 14) is within plus or minus 20%, the haze values ​​are said to be similar.

[0042] The refractive index of the adhesive sheet 151 is preferably the same as that of the inner lens 14. The expression "having the same refractive index as that of the inner lens 14" used in this specification is not limited to the case where the refractive index is the same as that of the inner lens 14, but also includes the case where the refractive index is close to that of the inner lens 14. For example, when the refractive index of the adhesive sheet 151 is in the range of "the value of the refractive index of the inner lens 14 minus 0.05" to "the value of the refractive index of the inner lens 14 plus 0.05", it can be said that the adhesive sheet 151 has the same refractive index as that of the inner lens 14.

[0043] According to the inner lens 14 of this embodiment, the first lens portion 141 and the second lens portion 142 are formed separately and then bonded together to form a long inner lens 14. Thus, it is not necessary to prepare a mold of a size corresponding to the overall shape of the inner lens 14.

[0044] When a long member is molded with resin, it is necessary to study the mold shape, the position of the gate, etc. so that the area away from the gate is not completely filled with resin, or the entire area is filled with resin. However, the inner lens 14 involved in this embodiment only needs to form the first lens portion 141 and the second lens portion 142 separately, so such a problem is not likely to occur, and the degree of freedom of the shape of the inner lens 14 can be increased, or the long inner lens 14 can be simply formed.

[0045] In addition, in the present embodiment, the end portion 1411 in the longitudinal direction of the first lens portion 141 and the end portion 1421 in the longitudinal direction of the second lens portion 142 are bonded together, so the first lens portion 141 and the second lens portion 142 can be bonded together easily.

[0046] In addition, in the present embodiment, the first lens portion 141 and the second lens portion 142 are fitted together and bonded together by the adhesive sheet 151. The adhesive sheet 151 is filled in the gap formed in the fitting portion between the first lens portion 141 and the second lens portion 142, so that light leakage from the fitting portion between the first lens portion 141 and the second lens portion 142 can be suppressed.

[0047] In addition, in this embodiment, the end 1411 of the first lens portion 141 has a concavoconvex shape, and the end 1421 of the second lens portion 142 has a concavoconvex shape, and the convex portion of one side is fitted with the concave portion of the other side. Thus, compared with the case where the ends with flat surfaces are fitted with each other, the strength in the direction intersecting the longitudinal direction is improved.

[0048] In addition, in the present embodiment, the adhesive sheet 151 only bonds the first convex portion 1411A of the first lens portion 141 and the second concave portion 1421B of the second lens portion 142. Thus, compared with the case where the end portion 1411 of the first lens portion 141 and the end portion 1421 of the second lens portion 142 are all bonded by the adhesive sheet 151, the amount of adhesive sheet 151 used can be reduced. In addition, in the fitting portion between the first lens portion 141 and the second lens portion 142, the gap on the side of the emitting surface 14b of the inner lens 14 is filled with the adhesive sheet 151, so when the vehicle lamp 10 is observed from the front (the side from which light is emitted), the integrated appearance of the inner lens 14 can be achieved.

[0049] In the present embodiment, when the total light transmittance of the inner lens 14 is about the same as that of the adhesive sheet 151 , light incident on the adhesive sheet 151 is transmitted in the same manner as the inner lens 14 , so that light can be uniformly emitted from the inner lens 14 .

[0050] In the present embodiment, when the inner lens 14 and the adhesive sheet 151 contain a diffusing agent, light incident on the adhesive sheet 151 is diffused in the same manner as the inner lens 14 , so that light can be uniformly emitted from the inner lens 14 .

[0051] In addition, the structure of the end portion 1411 of the first lens portion 141 and the end portion 1421 of the second lens portion 142 is not limited to Figure 3 For example, Figure 3 In the embodiment, the surface 1411A1 of the first lens portion 141 and the surface 1421B1 of the second lens portion 142 extend in a direction perpendicular to the longitudinal direction (in this example, the front-rear direction). In addition, the surface 1411B1 of the first lens portion 141 and the surface 1421A1 of the second lens portion 142 extend in a direction perpendicular to the longitudinal direction. However, for example, Figure 4 As shown in FIG. 1 , the surface 1411A1 of the first lens portion 141 and the surface 1421B1 of the second lens portion 142 may extend in a direction intersecting the length direction. Similarly, the surface 1411B1 of the first lens portion 141 and the surface 1421A1 of the second lens portion 142 may extend in a direction intersecting the length direction. Figure 3 The adhesive sheet 151 is arranged in a large range of the structure, thereby improving the bonding strength.

[0052] Or, if Figure 5 as well as Figure 6 As shown in the example, the end 1411 of the first lens portion 141 and the end 1421 of the second lens portion 142 may each have a flat end surface. Figure 5 As shown, the surface 1411D of the end 1411 of the first lens portion 141 that faces the second lens portion 142 and the surface 1421D of the end 1421 of the second lens portion 142 that faces the first lens portion 141 may extend in directions orthogonal to the length direction. Figure 6 As illustrated, the surface 1411E of the first lens portion 141 and the surface 1421E of the second lens portion 142 may extend in directions intersecting the longitudinal direction.

[0053] In addition, in the present embodiment, an adhesive sheet 151 is used as the adhesive portion 15, but an adhesive 152 may be used instead of the adhesive sheet 151. For example, before assembling the first lens portion 141 and the second lens portion 142, the adhesive 152 is applied to one side of the first lens portion 141 and the second lens portion 142, and then the first lens portion 141 and the second lens portion 142 are engaged, thereby bonding the adhesive 152 to the other side of the first lens portion 141 and the second lens portion 142. Thus, the adhesive 152 is filled in the gap formed in the engaged portion of the first lens portion 141 and the second lens portion 142. Alternatively, the adhesive 152 may be filled in the gap formed between the first lens portion 141 and the second lens portion 142 after the first lens portion 141 and the second lens portion 142 are assembled and engaged.

[0054] The adhesive 152 is made of a light-transmitting material such as an acrylic, silicone, or epoxy material.

[0055] The adhesive 152 is cured by, for example, room temperature curing, UV curing, thermal curing, or the like.

[0056] The adhesive 152 may contain a diffusing agent. Examples of the diffusing agent include silicon dioxide, calcium carbonate, barium sulfate, glass beads, PS fine particles, etc. The haze value of the adhesive 152 is preferably the same as that of the inner lens 14 .

[0057] The refractive index of the adhesive 152 is preferably approximately the same as that of the inner lens 14 .

[0058] Similar to the adhesive sheet 151, the adhesive 152 can be used to Figure 3 to Figure 6 The bonding portion 15 is a bonding portion where the first lens portion 141 and the second lens portion 142 are bonded together. Figure 3As shown, when only the first convex portion 1411A of the first lens portion 141 and the second concave portion 1421B of the second lens portion 142 are bonded together by the adhesive 152, the gap between the first convex portion 1411A and the second concave portion 1421B and the gap between the first concave portion 1411B and the second convex portion 1421A are not connected, so it is possible to suppress the adhesive 152 from leaking out of the gap between the first concave portion 1411B and the second convex portion 1421A and overflowing to the incident surface 14a side of the inner lens 14. In addition, after the adhesive 152 is filled in the gap between the first convex portion 1411A and the second concave portion 1421B, it is not necessary to flip the inner lens 14 and fill the gap between the first concave portion 1411B and the second convex portion 1421A of the second lens portion 142 with the adhesive 152, so the manufacturing process becomes easy.

[0059] Furthermore, the adhesive 152 can be used to Figure 7 The bonding portion 15 is a bonding portion where the first lens portion 141 and the second lens portion 142 are bonded together. Figure 7 As illustrated, it is possible to configure that the surface 1411F of the end 1411 of the first lens portion 141, which faces the second lens portion 142, and the surface 1421F of the end 1421 of the second lens portion 142, which faces the first lens portion 141, extend in a direction intersecting the longitudinal direction, and the distance between the surface 1411F and the surface 1421F in the longitudinal direction increases from the incident surface 14a side of the inner lens 14 toward the emission surface 14b side. In this example, the surface 1411F and the surface 1421F are flat end surfaces, and the distance between the surface 1411F and the surface 1421F gradually increases from the incident surface 14a side of the inner lens 14 toward the emission surface 14b side. According to such a configuration, when the adhesive 152 is filled from the emission surface 14b of the inner lens 14, it is possible to suppress the adhesive 152 from overflowing to the incident surface 14a side of the inner lens 14.

[0060] In addition, in the present embodiment, the inner lens 14 is formed of two lens components, but the inner lens 14 may be formed of three or more lens components.

[0061] For example, Figure 8 As shown in FIG. 1 , the inner lens 14 has a shape extending in the left-right direction when the vehicle lamp 10 is viewed from the front (the side from which light is emitted), and as shown in FIG. Fig. 9 As shown in the example, the inner lens 14 includes a first lens portion 143, a second lens portion 144, and a third lens portion 145. In this example, the inner lens 14 has a convex shape in which the second lens portion 144 protrudes toward the outer lens 12 side more than the first lens portion 143 and the third lens portion 145. Alternatively, the inner lens 14 may have a concave shape in which the first lens portion 143 and the third lens portion 145 protrude toward the outer lens 12 side more than the second lens portion 144.

[0062] The first lens portion 143, the second lens portion 144, and the third lens portion 145 are assembled and integrated after being formed separately. Fig. 9 As shown, the end 1431 of the first lens portion 143 in the longitudinal direction is bonded to the end 1441 of the second lens portion 144 in the longitudinal direction. In addition, the end 1442 of the second lens portion 144 in the longitudinal direction is bonded to the end 1451 of the third lens portion 145 in the longitudinal direction.

[0063] As the bonding method, for example, solvent bonding by dropping an organic solvent, polymerization bonding by dropping a monomer and a polymerization initiator, etc. can be used. By bonding using solvent bonding or polymerization bonding, it is possible to form an inner lens 14 having the same strength and durability as when the inner lens 14 is formed in its entire shape without being divided.

[0064] In this example, a surface 1431A of an end portion 1431 of the first lens portion 143 that is opposite to the second lens portion 144 is bonded to a surface 1441A of an end portion 1441 of the second lens portion 144 that is opposite to the first lens portion 143. In addition, a surface 1442A of an end portion 1442 of the second lens portion 144 that is opposite to the third lens portion 145 is bonded to a surface 1451A of an end portion 1451 of the third lens portion 145 that is opposite to the second lens portion 144.

[0065] The surface 1431A of the first lens portion 143 and the surface 1441A of the second lens portion 144 extend in the longitudinal direction. The surface 1442A of the second lens portion 144 and the surface 1451A of the third lens portion 145 extend in the longitudinal direction. That is, the bonding surfaces of the lens portions (surface 1431A, surface 1441A, surface 1442A, surface 1451A) are configured to be parallel to the emission surface 14b of the inner lens 14.

[0066] The lens portions are bonded to each other by dripping an organic solvent or a solvent such as a monomer and a polymerization initiator on one side of the bonding surface of the opposing lens portions to bond the lens portions to each other. For example, the first lens portion 143 and the third lens portion 145 are set in a fixture, and a solvent is dripped on the surface 1431A of the first lens portion 143 and the surface 1451A of the third lens portion 145. Then, the second lens portion 144 is pressed against the first lens portion 143 and the third lens portion 145 from a direction orthogonal to the longitudinal direction of the inner lens 14, thereby bonding the lens portions to each other.

[0067] In addition, a material that absorbs the solvent, such as a sponge, may be installed on the portion corresponding to the bonding surface of the clamp. The material can absorb the solvent that seeps out due to the crimping. In addition, the dripping of the solvent may be performed mechanically by a dispenser or the like, or may be performed manually by a pipette, a brush, or the like.

[0068] In this way, the bonding surfaces of the lens portions are configured to be parallel to the emission surface 14b of the inner lens 14, and the bonding is performed using an organic solvent or a polymer, so that when the vehicle lamp 10 is viewed from the front (the side from which light is emitted), the inner lens 14 can have an integrated appearance. In addition, the second lens portion 144 is pressed against the first lens portion 143 and the third lens portion 145 in a direction perpendicular to the longitudinal direction of the inner lens 14, so that the bonding operation can be performed in a smaller working space than when the bonding is performed in the longitudinal direction.

[0069] Furthermore, fine grooves may be formed on the bonding surface of each lens portion to counteract liquid dripping.

[0070] The embodiments of the present invention have been described above, but the technical scope of the present invention should not be interpreted restrictively due to the description of the present embodiment. The present embodiment is only an example, and various changes in the embodiments can be made within the scope of the invention recorded in the technical solution, which can be understood by those skilled in the art. The technical scope of the present invention should be determined based on the scope of the invention recorded in the technical solution and its equivalent scope.

[0071] The vehicle lamp 10 is not limited to Figure 1 For example, Fig.10 As shown, the light source unit 13 of the vehicle lamp 10 may include a plurality of light sources 131, a plurality of base members 132, a light guide 133, and a reflector 134. The light guide 133 and the reflector 134 have protrusions not shown in the figure, and can be supported and fixed to the lamp body 11 via the protrusions. Alternatively, the light guide 133 and the reflector 134 can be fixed to the lamp body 11 via a base member not shown in the figure.

[0072] The light guide 133 extends along the length direction of the inner lens 14, and has incident surfaces 1331 at both ends in the length direction. The plurality of light sources 131 are respectively arranged to face the incident surfaces 1331 of the light guide 133. A total reflection step is provided on the surface of the light guide 133 on the side opposite to the surface facing the inner lens 14, and the light incident on the incident surface 1331 is reflected toward the inner lens 14 through the total reflection step. In addition, in the light guide 133, a diffusion material may be used instead of the total reflection step.

[0073] The inner lens 14 of the vehicle lamp 10 can be used not only as a lens disposed in the lamp chamber of a tail lamp or a rear combination lamp mounted at the rear of the vehicle, but also as various lenses disposed in the lamp chamber of other lamps such as a headlamp. In addition, the inner lens 14 can be an inner lens that does not extend in the lateral direction of the vehicle but extends in a long strip in the vertical direction.

[0074] The first lens portion 141 and the second lens portion 142 constituting the inner lens 14 may be fixed by bolts in addition to being bonded by the bonding portion 15. This strengthens the bonding portion of the lens portions.

[0075] exist Figure 3 to Figure 6 In the configuration of the first lens portion 141 and the second lens portion 142, the first lens portion 141 and the second lens portion 142 are bonded by filling the bonding portion 15 in the gap of the fitting portion, but they may also be bonded by solvent bonding or polymerization bonding. Fig. 9 In the configuration, the first lens portion 143, the second lens portion 144, and the third lens portion 145 are bonded by solvent bonding or polymerization bonding, but may be bonded by fitting together and filling the bonding portion 15 in the gap between the fitting portions.

[0076] This application is based on Japanese Patent Application No. 2022-90825 filed on June 3, 2022, the contents of which are incorporated herein by reference.

Claims

1. A lens, which is a long lens arranged in a lamp chamber of a vehicle lamp, wherein: The lens includes a first lens portion and a second lens portion divided in a longitudinal direction. The first lens portion is bonded to the second lens portion.

2. The lens according to claim 1, wherein: An end portion of the first lens portion in the longitudinal direction is bonded to an end portion of the second lens portion in the longitudinal direction.

3. The lens according to claim 1 or 2, wherein: The lens has a bonding portion that bonds the first lens portion and the second lens portion. The first lens portion, the second lens portion, and the bonding portion have transmittances of the same degree.

4. The lens according to claim 1 or 2, wherein: The lens has a bonding portion that bonds the first lens portion and the second lens portion. The first lens portion, the second lens portion, and the adhesive portion each contain a diffusing agent.

5. The lens according to claim 1 or 2, wherein: The lens has a bonding portion that bonds the first lens portion and the second lens portion. The end portion of the first lens portion bonded to the second lens portion has a first convex portion and a first concave portion, The end portion of the second lens portion bonded to the first lens portion has a second convex portion fitted with the first concave portion and a second concave portion fitted with the first convex portion. The bonding portion bonds at least one of the first convex portion and the second concave portion, and the first concave portion and the second convex portion.

6. The lens according to claim 5, wherein: The surface of the first convex portion facing the second concave portion and the surface of the second concave portion facing the first convex portion extend in a direction intersecting the longitudinal direction. A surface of the second convex portion facing the first concave portion and a surface of the first concave portion facing the second convex portion extend in a direction intersecting the longitudinal direction.

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