JP2012054614A - Lens body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens body that has no loss of light.SOLUTION: A lens body for a light emitting device comprises a lens section and a support section that supports the lens section. The support section comprises a top plate section coupled with a bottom surface and/or a side surface of the lens section, and a leg section combined with the top plate section and having a fitting section fitted into a light emitting device substrate. The bottom surface of the lens section opposed to the light emitting device of the lens section and/or the top plate section is provided with a buffer section composed of a low hardness material having light transparency that eliminates loss of the light caused by an air layer between the light emitting device and the bottom surface of the lens section and/or the top plate section.

Description

  The present invention relates to a lens body for a light emitting element, and particularly relates to a lens body suitably used for a light emitting device using a light emitting element such as a light emitting diode.

  In a light emitting element such as a light emitting diode (LED), a condensing lens body for restricting the traveling direction of light emitted on a sealing material may be provided depending on the purpose of use (Patent Document). 1). In such a condenser lens body, an epoxy resin or a cycloolefin copolymer resin (hereinafter sometimes referred to as a COC resin) is used as a material, and transfer molding or injection molding is used as a molding method. It has been. These outer lens bodies used for LEDs are installed and used on LED light sources (Patent Documents 2 to 4).

  In these conventional lens bodies, an air layer is often provided between the lens body and the light source. The reason is that the heat insulation effect of the air layer prevents the resin, which is the lens material such as the epoxy resin and the COC resin, from being deteriorated by heat and ultraviolet rays emitted from the light emitting element, This is to protect the light emitting element itself from physical damage due to contact with the lens body or other members (such as legs). Furthermore, it is possible to attach the lens body to light emitting elements of various sizes by assuming that such a space is maintained.

However, these conventional lens bodies have the following problems. That is, since such an air layer exists, reflection occurs on the incident light side surface of the lens due to the presence of an air interface generated between the LED light source and the lens body, and loss of transmitted light occurs.
Since no appropriate solution has been found for such a problem, in the lens body as described above, it is impossible to produce a lens body that is free from both deterioration of the lens body material and loss of light. Currently.

Japanese Patent Laid-Open No. 3-119769 JP 2003-307663 A JP-A-10-154832 JP 2000-150968 A

It is an object of the present invention to provide a lens body that has no loss of light generated between the lens portion and the light emitting element.
It is a lens body for a light-emitting element that can be installed efficiently without being affected by the size of the light-emitting element or the height of the light-emitting element installed on the substrate, and is stable against mechanical external forces such as vibration. It aims at providing the lens body for light emitting elements which can manufacture the light emitting device which can maintain an installation state.

  As a result of intensive studies in view of the above problems, the present applicants have created an air layer between the light emitting element and the lens body that has been required for the conventional lens body by providing the lens body with a specific member. It was found that the above problem was solved surprisingly, and the present invention was completed as a result of further research.

That is, the present invention relates to the following inventions.
(1) A lens body for a light emitting element comprising a lens portion and a support portion that supports the lens portion, wherein the support portion includes a top plate portion that is joined to a bottom surface and / or a side surface of the lens portion, and A leg portion coupled to the top plate portion and having a fitting portion that fits to the light emitting element substrate. The bottom surface of the lens portion facing the light emitting element of the lens portion and / or the top plate portion includes a light emitting element. The said lens body provided with the buffer part which consists of a low-hardness material which has translucency for eliminating the loss of the light by the air layer between the bottom face of a lens part and / or the said top plate part.
(2) The said lens body whose low-hardness material is 1 type, or 2 or more types from rubbers and gels.
(3) The lens body, wherein the gel is one or more selected from a fluororesin gel or a silicone resin gel.
(4) The lens body, wherein the lens portion is made of any one of epoxy resin, fluororesin, glass, COC resin, and silicone resin.
(5) The lens body, wherein the lens part is made of silicone resin and the buffer part is made of silicone rubber.
(6) A light emitting device comprising the lens body according to any one of the above and a light emitting element.
(7) A method for producing the lens body according to (1), including the following steps:
(A) a step of forming a lens body including a lens portion and a support portion; and (b) a step of providing a buffer portion on the top plate portion of the support portion.

  The present invention makes it possible to eliminate the air layer required for the conventional lens body by reducing the light loss by providing the lens body with a light-transmitting buffer portion made of a low hardness material. It is. In the lens body of the present invention, by providing the light-transmitting buffer portion as described above, the lens portion and the light emitting element are separated from each other even if an air layer that has been conventionally required is eliminated. Therefore, in the lens body of the present invention, it is needless to say that the material of the lens body is prevented from being deteriorated to the same degree or more as the lens body having the conventional air layer.

(1) According to the present invention, there is provided a lens body capable of at least reducing light loss caused by reflection of light emitted from the light emitting element on the lens surface, which is at least smaller than or substantially eliminated from the conventional lens body. .
(2) According to the present invention, the low-hardness material is one or more from rubbers and gels, and the low-hardness material adheres to the surface of the light-emitting element due to repulsive force due to preferable elasticity. Thus, a lens body is provided in which the light loss is further reduced, and at the same time, the light emitting device having a structure stable against vibration is maintained, and the surface of the light emitting element is protected.
(3) According to the present invention, the gel is one or two or more selected from a fluororesin gel or a silicone resin gel. This provides a lens body with improved heat resistance and no deterioration. Is done.
(4) According to the present invention, the lens part is made of any one of epoxy resin, fluororesin, glass, COC resin and silicone resin, which has heat resistance, good lens characteristics, and excellent handling. Is provided.
(5) According to the present invention, when the lens portion is made of silicone resin and the buffer portion is made of silicone rubber, a lens body that is further excellent in handling is provided.
(6) According to the light-emitting device including any one of the lens bodies and the light-emitting element according to the present invention, light emitted from the light-emitting element is reflected by the lens surface between the lens unit and the light-emitting element. Thus, there is provided a light emitting device in which deterioration of the material of the lens portion is suppressed to be equal to or less than the conventional one. In addition, the lens body is efficiently installed on the substrate without being affected by variations in the size of the light emitting device and the height of the light emitting device installed on the substrate, and the installation state is stable against mechanical external forces such as vibration. Can be preferably maintained.
(7) According to the manufacturing method of the lens body of the present invention, it is possible to prevent deterioration of the material of the lens portion, and to make the light loss of the light emitting element smaller or substantially less than that of the conventional lens body. It is possible to efficiently manufacture a lens body that can be stably installed even if there are variations in the placement of elements on the substrate.

It is a figure which shows the conventional lens body. It is a side view which shows the one aspect | mode which has a form which a buffer part contains a curved surface and covers a light emitting element among the lens bodies of this invention. It is a side view which shows the one aspect | mode in which the buffer part contains a curved surface among the lens bodies of this invention, and this buffer part is in contact with the light emitting element. It is a side view which shows the one aspect | mode which has a form which a buffer part contains a plane among the lens bodies of this invention, and covers a light emitting element. It is a side view which shows the one aspect | mode in which the buffer part contains a plane among the lens bodies of this invention, and this buffer part is in contact with the light emitting element. It is a side view which shows the other one aspect | mode which has a form which a buffer part contains a plane among the lens bodies of this invention, and covers a light emitting element. It is a side view which shows the one aspect | mode which this buffer part is in contact with the light emitting element among other one aspects in which the buffer part contains a plane among the lens bodies of this invention. It is sectional drawing by Aa which passes along the center of the ring-shaped thing in which the top plate part has a space in the center part among the lens bodies of this invention, and passes through the center of a lens part. It is a sectional side view which shows the other aspect which is a ring shape in which the top-plate part has space in the center part among the lens bodies of this invention.

  In the present invention, the “lens body” includes, in addition to a generally called lens body itself having a function of changing an optical path, in addition to a lens portion as a lens body, and other portions coupled to the lens portion. Means things. Therefore, the lens body as the main body generally referred to is referred to as a “lens portion” in the present invention.

  In the present invention, “translucent”, “translucent” or “translucent” means that light is not substantially lost due to absorption or reflection. Therefore, what has translucency includes what is transparent and what has translucency only with respect to the light of a specific wavelength.

  In the present invention, the “support portion” is typically one or more members for installing the lens body of the present invention on a light emitting element substrate or the like, and includes a bottom surface and / or a side surface of the lens portion. And a leg portion coupled to the top plate portion, and the leg portion includes a fitting portion for fitting the light emitting element substrate.

  In the present invention, the “low hardness material” means a material having a hardness lower than that of the lens portion. Typically, it means a material containing gels and rubbers. “Gel” and “rubber” mean a material having rubber elasticity that can be restored to its original shape even if it is greatly deformed, and the one with the smallest hardness is called “gel”. The number of network-like crosslinks of the molecule-like molecules is smaller than that of rubber. A material having a hardness greater than “gel” is referred to as “rubber”. Also, “resin” is one that has a hardness higher than rubber and whose structure does not break or its shape does not recover when deformed greatly. That is, in the present specification, “gel”, “rubber” and “resin” are relatively compared with the applied force even if the material is composed of the same component, using the degree of deformation and hardness as an index. It is a material that can realize the operational effects of the present invention by using them.

Hereinafter, the present invention will be described in more detail.
An example of a conventional lens body and a light emitting device using such a lens body is shown in FIG. 1, and examples of light emitting devices manufactured using the lens body of the present invention and the lens body of the present invention are shown in FIGS.
As shown in FIGS. 2 to 9, the lens body 1 of the present invention is a lens body for a light emitting element including a lens unit 2 and a support unit 9 coupled to the lens unit 2, and the support unit 9 is a lens unit. The top plate portion 3 is joined to the bottom surface 10 or the side surface of the lens 2 and the leg portion 8 is joined to the top plate portion 3. Between the lens bottom surface 10 and the light emitting element 5, the buffer part 4 made of a light-transmitting low-hardness material is provided in a state substantially free of an air layer.

  The lens body 1 of the present invention is emitted from the light emitting element 5 by including the buffer portion 4 coupled to the structure, particularly the top plate portion 3 and / or the lens bottom surface 10 and facing the lens surface of the lens portion 2. Light loss can be substantially eliminated. Since the buffer portion 4 is made of a low-hardness material, the buffer body 4 and the light emitting element 5 of the lens body of the present invention can be in close contact with each other, and the structure is stable against external force.

  As shown in FIGS. 2 to 7, the lens body 1 of the present invention is provided with a support portion 9 including a leg portion 8 having a top plate portion 3 and a fitting portion 7 that is fitted to the light emitting element substrate. Since the leg portion 8 has the fitting portion 7, the lens body 1 can be easily installed on the substrate 6 on which the light emitting element 5 is installed. In the case where the fitting portion 7 is provided on the leg portion 8, the fitting portion 7 is engaged with the substrate 6, whereby the positions of the lens portion 2 and the substrate 6 are determined, and the buffer portion 4 and the light emitting element 5 are It is preferable because it adheres and the air layer is more completely eliminated. The number and shape of the leg portions 8 are not limited, but can be changed according to the shapes of the lens portion 2 and the substrate 6. For example, when the shape of the substrate 6 is a rectangular thin plate, the four legs 8 may be provided so as to support the four corners or four sides of the thin plate, respectively. Further, the leg portion 8 may be two or more planar members, or may be a column having an arcuate curved surface or a column as long as the substrate is a disc. Alternatively, they may have a shape in which the legs are integrated to form a space.

As shown in FIGS. 8 and 9, the shape of the top plate portion 3 in the aspect of the present invention is a ring shape having a space in the center so as not to obstruct the light transmission to the lens portion 2. The top plate portion 3 in this aspect has a shape that is joined to a part of the outer peripheral portion of the lens bottom surface 10 and / or the side surface of the lens portion 2. In addition, when the raw material of a top-plate part is translucent, the top-plate part 3 can also be a plate-shaped shape joined to the whole lens bottom face. In such a case, the buffer part 4 takes the form joined to the top plate part 3.
Moreover, the leg part 8 in the lens body 1 of the present invention is such that, by adding an auxiliary agent, the part of the leg part that does not contact the lens body is colored including white or black, and the part that is in contact with the lens body is transparent. This is preferable because the light collection efficiency is increased. In particular, when the portion of the leg that is not in contact with the lens body is white, the light is reflected and returned, which is particularly preferable because the light collection efficiency becomes higher.

In the lens body of the present invention, the buffer portion 4 and the light emitting element 5 are in close contact with each other with a slight pressure or within a range allowed by the light emitting device. The thickness of the buffer portion 4 in such an embodiment is preferably such that there is substantially no gap (air layer) between the lens bottom surface and the light emitting element surface, and is slightly larger than the distance between the lens bottom surface and the light emitting element upper portion. It is preferable that the thickness is large and the buffer portion is compressed so that the air layer is removed by pressure bonding to the lens bottom surface and the light emitting element. In addition, even when the light emitting element is in an incomplete contact state when not in use, the light emitting element that is in close contact by thermal expansion is also included in the present invention. The distance that the buffer portion can be compressed and adjusted is preferably a distance that covers the range of height variation from the substrate of the light emitting element when the light emitting element is installed, because the light emitting diode can be efficiently manufactured. .
Although the maximum thickness of the buffer part 4 is not specifically limited, It is preferable that it is the thickness which can be installed between a lens bottom face and a light emitting element board | substrate in the state compressed moderately.

  With such a configuration, the loss of light emitted from the light emitting element 5 can be further reduced in the lens body of the present invention. In such an embodiment, when the substrate 6 is attached, the buffer portion 4 may be in contact with the light emitting element 5 or may be in a state where the light emitting element 5 is slightly invaded (FIGS. 3, 5 and 7), or The light emitting element 5 may be partially or entirely indented (FIGS. 2, 4 and 6).

  Moreover, the shape of the buffer part 4 is not limited, In addition to the shape including a curved surface as shown in FIGS. 2 and 3, the shape including a flat surface as shown in FIGS. Moreover, the buffer part 4 may use a low-hardness material only for the lens bottom surface or the part in contact with the light emitting element.

  As described above, in the present invention, the portion having the maximum thickness of the buffer portion is typically in close contact with the light emitting element, and therefore, the buffer portion preferably has a low hardness as a material. In such a case, the light emitting element and its substrate can be easily installed, and the structure is stable against external force, and the surface of the light emitting element is easily protected.

In the present invention, the light-transmitting low-hardness material used for the buffer part 4 includes many polymer substances, and rubbers or gels are preferable. Rubbers include natural rubber and synthetic rubber. Synthetic rubber is preferably isoprene rubber, butadiene rubber, acrylic rubber, styrene rubber, ethylene propylene rubber, butyl rubber, urethane rubber, fluoro rubber or silicone rubber, and fluoro rubber and silicone rubber are preferred from the viewpoint of heat resistance and chemical stability. Further, silicone rubber is most preferable from the viewpoint of easy bonding with the lens portion by crosslinking.
In addition, a material having a higher refractive index than the material of the lens portion as the material of the buffer portion 4 can be more efficiently condensed in the direction of the lens portion 2 without reflecting the light emitted from the light emitting element 5. Therefore, it is preferable.

The type of silicone rubber is not particularly limited, and various products commercially available as silicone rubber compounds from silicone manufacturing and sales companies such as dimethylpolysiloxane can be appropriately selected and used. Specifically, for example, KE-951U (product name), KE-550U (product name) manufactured by Shin-Etsu Chemical Co., Ltd., SH-851U (product name) manufactured by Toray Dow Corning Co., Ltd., and SE1740 (product name). , SE1821 (trade name), CY52-205 (trade name), TSE-221-5U (trade name) manufactured by GE Toshiba Silicone Corporation, and the like. Among these, since CY52-205 is a high-viscosity type, it is easy to mold a shape raised by surface tension at the time of potting molding, and it is also suitable for manufacturing a lens body having such a shape.
Silicone gel is preferable as the gel. Examples of silicone gels include SE1880 (product name), SE1886 (product name), and CY52-276 (product name) manufactured by Toray Dow Corning Co., Ltd. Among them, CY52-276 is a low contact failure. It is suitable for use in electronic parts because it is an anti-molecular siloxane product.
When silicone elastomer is used, the above-mentioned silicone rubber compound is blended with a vulcanizing agent specified by a silicone manufacturing and sales company and, if necessary, a colorant or pigment, and after kneading uniformly, the desired shape is obtained. The low-hardness material in the present invention may be obtained by thermoforming so that
A thermoplastic elastomer is also preferably used as the elastic body of the present invention.

These low-hardness materials can be used alone, but two or more of them may be blended at an appropriate ratio, or they may be layered together with a hard material and elastic. You may use as a buffer part.
The low-hardness materials include fillers such as glass fibers and glass beads, inorganic fluorescent pigments such as YAG phosphors, perylene-based organic fluorescent agents, ultraviolet inhibitors, plasticizers, colorants, pigments, etc. Adjuvants can be appropriately added and used within a range that does not impair the low hardness and translucency.

The material of the lens part of the lens body of the present invention is not particularly limited as long as it is a material having translucency among resin, glass, rubber and the like. From the viewpoint of handling, a resin is preferable.
In the present invention, natural resins include rosin and alkaloid resins, and synthetic resins include polystyrene, polyvinyl chloride, transparent polyimide, cycloolefin copolymer resin (COC resin (single Polymerized cycloolefin polymer)), polyethylene, polyethylene terephthalate, acrylic resin, polycarbonate, epoxy resin, fluororesin, silicone resin (silicone resin), ABS resin, PBT resin, epoxy resin, BPT resin, PPS resin The Of these, a synthetic resin is preferable from the viewpoint of ease of processing, and a fluororesin, a silicone resin, or a COC resin is more preferable from the viewpoint of translucency and heat resistance, and points of heat resistance, translucency, and processability. Therefore, a silicone resin is more preferable. In particular, when the low hardness material is silicone rubber or silicone gel, the processability is very good in the combination. Among silicone resins, dimethyl silicone having a high ultraviolet transmittance and little change over time such as yellowing is preferable, followed by phenyl silicone and fluorine silicone having excellent strength.

  In the present invention, a liquid material is suitably used as the resin material. A resin lens part can be obtained by curing the liquid resin material. When a silicone resin is used as the resin material, a liquid addition reaction curable silicone resin composition is particularly preferable. The liquid addition reaction curable silicone resin composition is suitable because it can be uniformly cured both on the surface and inside.

  The addition reaction type silicone resin composition is not particularly limited as long as it forms a transparent silicone resin by thermosetting. For example, organopolysiloxane is used as a base polymer, and organohydrogenpolysiloxane and platinum-based catalyst are used. And those containing heavy metal catalysts such as

The organopolysiloxane includes the following average unit formula: RaSiO _{(4-a) / 2}
Wherein R is an unsubstituted or substituted monovalent hydrocarbon group, preferably having 1 to 10 carbon atoms, particularly 1 to 8. a is a positive number of 0.8 to 2, particularly 1 to 1.8. Number.)
The thing shown by is mentioned. Here, as R, alkyl group such as methyl group, ethyl group, propyl group, butyl group, alkenyl group such as vinyl group and butenyl group, aryl group such as phenyl group and tolyl group, aralkyl group such as benzyl group, Examples include a chloromethyl group, a chloropropyl group, a 3,3,3-trifluoropropyl group, a cyano group-substituted hydrocarbon group in which some or all of the hydrogen atoms bonded to these carbon atoms are substituted with a halogen atom. , R may be the same or different, but those containing a phenyl group as R, particularly those containing 5 to 80 mol% of all R are phenyl groups, are heat resistance and transparency of the optical lens body. From the viewpoint of sex.

  Further, those containing an alkenyl group such as a vinyl group as R, particularly those having 1 to 20 mol% of all R are alkenyl groups are preferred, and those having two or more alkenyl groups in one molecule are preferably used. . Examples of such an organopolysiloxane include terminal alkenyl group-containing diorganopolysiloxanes such as dimethylpolysiloxane having a terminal alkenyl group such as a vinyl group and a dimethylsiloxane / methylphenylsiloxane copolymer.

On the other hand, the organohydrogenpolysiloxane is preferably trifunctional or higher (that is, one having three or more hydrogen atoms (Si-H groups) bonded to a silicon atom in one molecule), for example, methylhydrogenpolysiloxane. , Methylphenyl hydrogen polysiloxane, and the like, and liquids at room temperature are particularly preferable. Examples of the catalyst include platinum, platinum compounds, organometallic compounds such as dibutyltin diacetate and dibutyltin dilaurate, and metal fatty acid salts such as tin octenoate. The types and amounts of these organohydrogenpolysiloxanes and catalysts may be appropriately determined in consideration of the degree of crosslinking and the curing rate. In addition to the above components, fillers, heat-resistant materials, plasticizers and the like may be added to the extent that the strength and transparency of the resulting silicone resin are not impaired. As the silicone resin composition, a silicone resin material disclosed in Japanese Patent Application Laid-Open No. 2004-186168 or 2004-221308 can also be used. Commercial products such as KJR632 (product name), SCR-1004 (product name), SCR-1011 (product name), and X32-2535 / KER-2667B (product name) manufactured by Shin-Etsu Chemical Co., Ltd. can also be used. .
The shape of the lens portion in the present invention is not particularly limited. A convex lens, a concave lens, or a Fresnel lens or a kamaboko lens may be used. When a resin is used as the material, it is preferable in combination with a deformed lens such as a Fresnel lens or a kamaboko lens.

Although the manufacturing method of the lens body of this invention is not specifically limited, It can manufacture suitably by the method containing the following process (a)-(d):
(A) charging the lens part material into a mold and molding the lens part;
(B) charging the leg material into a mold and molding the leg;
(C) a step of bonding the lens portion and the leg portion; and (d) a step of providing a buffer portion.

More specifically, the manufacturing method may be a method including the following steps, for example.
(A) In a two-piece upper and lower mold, a step of charging a lens part material into a lower mold and molding the lens part;
(B) a step of replacing the upper mold with a mold for molding the support section without taking out the lens section from the lower mold;
(C) charging a material for molding the support portion into a mold for molding the support portion, and molding the support portion integrally with the lens portion;
(D) The process of providing a buffer part in the top-plate part of a support part.

  The molding die as the lower die in the present invention comprises a lens portion cavity portion.

  In the manufacturing method of this invention, when manufacturing using the above-mentioned resin, a liquid thing is used suitably. A resin lens part can be obtained by curing the liquid resin material. When a silicone resin is used as the resin material, a liquid addition reaction curable silicone resin composition is particularly preferable. The liquid addition reaction curable silicone resin composition is suitable because it can be uniformly cured both on the surface and inside.

  The addition reaction type silicone resin composition is not particularly limited as long as it forms a transparent silicone resin by thermosetting. For example, organopolysiloxane is used as a base polymer, and organohydrogenpolysiloxane and platinum-based catalyst are used. And those containing heavy metal catalysts such as More specifically, those as described above are also preferably used in the production method of the present invention.

  In the production method of the present invention, the material of the support portion is not limited, and epoxy resin, COC resin, rubbers, thermoplastic elastomer, and the like are used. Rubbers include natural rubber and synthetic rubber. As the synthetic rubber, isoprene rubber, butadiene rubber, acrylic rubber, styrene rubber, ethylene propylene rubber, butyl rubber, urethane rubber, fluorine rubber, and silicone rubber are preferable. From the viewpoint of heat resistance and chemical stability, fluorine rubber and silicone rubber are preferable. Silicone rubber is most preferable from the viewpoint of easy bonding with the lens portion by crosslinking.

In addition, although the material of these leg parts can be used individually by 1 type, you may use a 2 or more types of material in a suitable ratio.
In addition, auxiliary materials such as fillers, plasticizers, colorants, and pigments can be appropriately added to the leg material. Examples of these adjuvants include fillers such as glass fibers and glass beads, plasticizers such as stearic acid, colorants such as carbon black, titanium oxide, and bengara, and fluorescent pigments such as YAG phosphors.

  Examples of the molding method in the production method of the present invention include transfer molding, injection molding, compression molding, (vacuum) casting molding, two-color molding, insert molding, potting molding, and LIM molding. The molding method can be appropriately selected depending on the product shape and material, but compression molding is preferred.

  In the production method of the present invention, the step of adhering the lens part and the support part, the support part and the buffer part, or the lens part and the buffer part may be insert molding. Those including cross-linking adhesion are preferred from the viewpoint of strength. Examples of the cross-linking adhesive include an unvulcanized rubber for adhesion, a primer, a peroxide, a coupling material, and the like, and a silane coupling agent is preferable in view of compatibility with silicone.

  The step of providing the buffer portion is not limited, but is suitable because potting is simple. In addition, the potting can be performed either before or after the lens portion or the lens body is taken out of the mold, but it is preferable to perform the potting before taking out the lens portion or the lens body before taking out the lens portion or the lens body again. .

  EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to the following examples.

Example 1
Of the two upper and lower molds, a silicone resin lens part was molded using a mold having a lens part cavity part in the lower mold. Next, without taking out the lens part from the lower mold, the upper mold was replaced with a mold for molding the support part, silicone rubber was charged into the mold, and molded by compression molding. The silicone resin lens part and the support part were adhered by cross-linking adhesion. Then, the buffer part was provided in the support part by potting.
The above lens body is not only superior in heat resistance and ultraviolet resistance than epoxy resin and COC resin by using silicone resin in the lens part and silicone rubber in the buffer part, but it is more durable by providing the buffer part. The lens body has a small surface reflection loss because it is enhanced and the air layer is eliminated.

According to the present invention, since the air layer between the lens unit and the light emitting element in the optical path is eliminated, a lens body having a small surface reflection loss at the lens unit is provided.
In addition, the fitting portion includes a buffer portion made of a low-hardness material between the light emitting element and the lens portion, and a support portion having a leg portion having a fitting portion joined to the lens portion. The leg portion is fixed to the substrate by being fitted to the light emitting element substrate, the distance between the lens portion and the light emitting element substrate is constant, while the drag is generated between the elasticity of the buffer portion, The lens body for a light-emitting element of the present invention is a lens body that can provide a light-emitting device that is stable against external forces such as vibration.
Further, since the material to be pressure-bonded to the light emitting element is a low hardness material, the light emitting element is not damaged.
In addition, since the light emitting element and the lens portion are separated from each other with the buffer portion therebetween, the deterioration of the lens portion can be prevented to the same extent as that of the conventional light emitting element lens.
Therefore, the present invention greatly contributes to the development of the lens body industry, the lighting device industry, and related industries.

DESCRIPTION OF SYMBOLS 1 Lens body 2 Lens part 3 Top plate part 4 Buffer part 5 Light emitting element 6 Board | substrate 7 Fitting part 8 Leg part 9 Support part 10 Lens bottom face

Claims (7)

  A lens body for a light emitting device comprising a lens unit and a support unit that supports the lens unit, wherein the support unit is joined to a bottom surface and / or a side surface of the lens unit and the top plate unit And a bottom part of the lens part facing the light emitting element of the lens part and / or the top plate part, the light emitting element and the lens part of the lens part. The said lens body provided with the buffer part which consists of a low-hardness material which has translucency for eliminating the loss of the light by the air layer between a bottom face and / or the said top-plate part.   The lens body according to claim 1, wherein the low-hardness material is one or more of rubbers and gels.   The lens body according to claim 2, wherein the gel is one or more selected from a fluororesin gel or a silicone resin gel.   The lens body in any one of Claims 1-3 in which a lens part consists of either an epoxy resin, a fluororesin, glass, a cycloolefin copolymer resin, and a silicone resin.   The lens body according to claim 4, wherein the lens part is made of a silicone resin and the buffer part is made of silicone rubber.   A light-emitting device comprising the lens body according to claim 1 and a light-emitting element. The manufacturing method of the lens body of Claim 1 including the following process.
(A) forming a part of a lens body including a lens part and a support part; and (b) providing a buffer part on the top plate part of the support part.

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