TW201309968A - Light source unit - Google Patents

Abstract

Topic: To provided a light source unit for being assembled in the window allocation part and capable of achieving high water proof property, also provided is a light source unit for being assembled in the window allocation part and capable of achieving high water proof property for a long time. Solving means: The light source unit is characterized by comprising a light source module configured with a plural of LED elements on an LED substrate, it is configured in an integral cylindrical casing at borderless portion, across the window component, to radiate from the LED elements constituting the light source module; the window member is fixedly disposed in such a way that at one opening portion of the cylindrical casing is sealed and exhibits transparency; the entire border's periphery covering the cylindrical casing and the window member is filled with water impermeable sealant to form an annular sealing portion.

Description

Light source unit

The present invention relates to a light source unit having a plurality of LED (Light Emitting Diode) elements. More specifically, an LED element that emits light in an ultraviolet region is used as a light source, and a light source for fixing the ink or a light source can be suitably used. A light source unit such as a light source for curing a resin composition.

Recently, development of an LED element that emits light in an ultraviolet region has been advanced, and an LED element that emits light in such an ultraviolet region has been examined and used in various fields in which a discharge lamp in which mercury is sealed as a light source has been used.

As a light source unit having an LED element that emits light in a region of ultraviolet light, an LED substrate in which a plurality of LED elements are disposed is disposed on a heat sink, and a light source module having a rectangular outer shape is used. The light shielding module is disposed so as to cover the aluminum cover member having an opening in front of the light emission direction, and the light from the LED element constituting the light source module is disposed by closing the opening of the cover member. A structure in which a window member made of glass is radiated (for example, see Patent Document 1). In the light source unit, the cover member is attached to the four side faces of the light source module, and is formed by a plurality of plate members fixed by a screw member.

Specifically, for example, as disclosed in Patent Document 1, it is proposed to use a photocurable inkjet printer device for fixing a photocurable ink to a printing object such as paper. Fixing light source, except In addition, in the light curing device, the light source for curing, which is used to cure the resin composition containing the photocurable resin, is further reviewed.

In the case where the light source unit is used as a light source for fixing the ink or a light source for curing the resin composition, the window member adheres to the stain.

Specifically, in the case where the ink is used as the fixing light source for the ink, when the ink is ejected to the printing target, a part of the ejected ink does not adhere to the printing target and splashes around, and also adheres to the dirt. A window member of a light source unit. In addition, the photocurable ink adhered to the window member is cured by being irradiated with ultraviolet light, and is adhered to the dirt in a state of being cured.

Further, in the case of using a light source for curing as a resin composition, the siloxane or the like contained in the resin composition evaporates, and the window member is turbid (blurred) due to the window member attached to the light source unit.

In this way, the deposit (soil) attached to the window member of the light source unit can be removed by wiping the window member with a cloth having an organic solvent such as ethanol, but by using such a simple wiping operation, It is not possible to remove deposits and the like in a state in which the photocurable ink is hardened, for example. In order to remove the adhering material that cannot be wiped, it is necessary to immerse the surface of the window member and the surface of the window member in the organic solvent for a certain period of time and then wash it.

However, in order to immerse the outer surface of the window member in an organic solvent, it is necessary to impregnate the arrangement portion of the window member of the light source unit, but the immersion portion of the window member of the light source unit is immersed in an organic solvent. For example, there is a gap between the window member and the cover member or a structure of the cover member The gap between the plate-like portions of the cover member and the like causes the organic solvent to enter the inside of the cover member, and the LED element disposed inside the cover member is short-circuited.

Further, in the light source unit having the structure in which the cover member is provided with the window member, the light source unit is invaded by the gap between the window member and the cover member, or the light source unit is used as a fixing source or resin for the ink. In the case of the light source or the like for curing the composition, the dirt is intruded, or the dirt (attachment) removed from the window member in the wiping operation of the adhering matter attached to the window member of the light source unit enters the state, and the like. There is a problem that the gap between the window member and the cover member is invaded by foreign matter or dirt. Further, in addition to the above, particularly in the case of using an adhesive to fix the window member, for example, the splicing portion of the window member is caused by immersing the arrangement portion of the window member of the light source unit in an organic solvent or the like The liquid is immersed, or the light from the LED element (ultraviolet light) is irradiated to the subsequent joint portion of the window member to cause deterioration or the like, and the adhesive property of the adhesive is lowered, and the cylindrical casing and the window member are not sufficiently obtained for a long period of time. The problem of closeness.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2011-103261

The present invention has been made in view of the above circumstances, and its object is to provide A light source unit having high water repellency can be obtained in the arrangement portion of the window member.

Another object of the present invention is to provide a light source unit which can obtain high water repellency in an arrangement portion of a window member.

A light source unit according to the present invention is characterized in that: a light source module including an LED substrate on which a plurality of LED elements are disposed is provided in a cylindrical casing having a structure of an infinite portion, and is radiated from the light source module via a window member The light is disposed in the light of the LED element; the window member is a window member that is fixed to the opening of one of the cylindrical casings and that is transparent to the opening of the opening; The cylindrical casing and the entire circumference of the window member are covered to form an annular seal portion formed of a liquid-impermeable filler material.

In the light source unit of the present invention, the window member supporting convex portion is provided on the inner circumferential surface of the opening of the cylindrical casing, and the LED constituting the light source module is formed on the surface of the window member supporting convex portion. It is preferable that the light is radiated to the front side region of the light in the light-shielding state, and the window member is bonded by the adhesive.

In the light source unit of the present invention, it is preferable to form a caulking groove for filling the caulking material at the margin of the cylindrical casing and the window member.

According to the light source unit of the present invention, the cylindrical casing according to the fixed window member has a body structure having no marginal portion, and the window member and the tubular member The margin of the casing covers the entire circumference of the margin, forming an annular seal formed by a liquid-impermeable filler material, and the outer peripheral surface of the cylindrical casing does not communicate with the outer casing and the cylindrical casing. In the gap between the inside of the window member and the cylindrical casing, the gap formed between the outside of the margin and the inside of the cylindrical casing is sealed by the liquid sealing body by the caulking material constituting the annular sealing portion. Therefore, the frame-shaped body composed of the cylindrical casing and the window member has a high waterproof structure, and high water repellency can be obtained in the arrangement portion of the window member formed by the frame-shaped body.

Therefore, the light source unit of the present invention has high water repellency due to the arrangement portion of the window member, and the liquid does not enter the cylindrical casing even when the arrangement portion of the window member is immersed in the liquid for a long period of time. internal.

Further, in the light source unit of the present invention, the gap formed between the window member and the cylindrical casing is sealed by the caulking material constituting the annular sealing portion, and the foreign matter or the dirt caused by the gap is not generated. The harm of intrusion.

In the light source unit of the present invention, the window member supporting convex portion is provided on the inner circumferential surface of the opening of the cylindrical casing, and the surface of the window member supporting convex portion is derived from the LED element constituting the light source module. The light is blocked in the light-emitting direction of the front side region, and then the structure of the window member is joined, whereby the subsequent joint portion of the window member can be positioned on the inner side of the annular seal portion, and the subsequent joint portion can be prevented from being formed. The adhesive is irradiated with ultraviolet light, so even if the adhesive is not resistant to ultraviolet light and liquid impermeability, there is no ultraviolet light irradiation, or the adhesive is deteriorated by the liquid permeation, so that The performance is lowered, and the adhesion between the cylindrical casing and the window member is maintained, and as a result, the window member is maintained by the annular seal portion. Since the margin of the cylindrical casing is sealed by the liquid, high water repellency can be obtained for a long period of time in the arrangement portion of the window member.

Hereinafter, embodiments of the present invention will be described in detail.

1 is a perspective view for explaining an example of a structure of a light source unit of the present invention, and FIG. 2 is a partially enlarged cross-sectional view for explaining an internal structure of a cylindrical case of the light source unit of FIG. 1, and FIG. 3 is a view showing the configuration of FIG. A perspective view of the light source module of the light source unit is used.

The light source unit 10 is provided with a rectangular LED substrate 23 in which a plurality of LED elements 22 are arranged on the upper surface (upper surface of FIGS. 2 and 3), and is disposed on a heat sink 25 having a rectangular parallelepiped appearance shape. 2 and the top of FIG. 3) the light source module 20 having the structure, and the light source module 20 has a cylindrical casing 30 in a rectangular shape, from one of the cylindrical casings 30 (FIG. 1 and The opening (above, also referred to as "light emission opening") of FIG. 2 is configured to emit light from the plurality of LED elements 22 constituting the light source module 20. Then, the light-emitting opening is sealed in the cylindrical casing 30, and the LED substrate 23 constituting the light source module 20 and the light-transmitting window member 35 for protecting the plurality of LED elements 22 are housed in In the light emitting opening portion, the opening portion (hereinafter also referred to as "light emitting opening portion") having a light emitting opening is fixedly disposed, and the window member 35 and the cylindrical case 30 are formed to be covered. A rectangular annular annular seal portion 40 formed of a liquid-impermeable filler material throughout the circumference.

In the example of the figure, a power supply mechanism for supplying power to the light source module 20 from an external power source is disposed on the lower surface (lower side in FIG. 2) of the heat sink 25 constituting the light source module 20 (not shown). And covering the electric power supply mechanism and covering the other opening of the cylindrical casing 30 (below the FIGS. 1 and 2), the plate-like member 18A made of a plurality of metals is screwed by the screw member 19. The formed housing 18 forms the cover member 15 by the housing 18 and the cylindrical housing 30. Further, a power supply connector 17 for connecting an external power source is provided to the casing 18 constituting the cover member 15. Further, in the present embodiment, the metal plate member 18A is used as the plurality of structural members for forming the casing 18, but the plurality of structural members associated with the casing 18 are not limited to the plate member as the region. Blocks are also available.

As shown in FIG. 3, a plurality of (32 in the illustrated example) LED elements 22 are arranged in two rows at equal intervals on the surface of the LED substrate 23, and are provided on the back surface of the LED substrate 23 to supply the plurality of LED elements 22. Power connector (not shown).

As the LED element 22, a person who emits light in an ultraviolet light region is used, and specifically, for example, peak light emission wavelengths are 365 nm, 385 nm, and 405 nm.

As the base material constituting the LED substrate 23, those suitable for the type of the LED element 22 and the like are used, and for example, aluminum nitride can be used.

As shown in FIG. 3, the heat sink 25 is for cooling the LED element 22 arranged on the LED substrate 23, for example, inside the heat sink body 25A having a cubic shape of a copper shape, for example, forming a useful a circulation flow path through which a cooling medium such as cooling water flows, a supply unit (not shown) for supplying a cooling medium to the circulation flow path, and a discharge unit (not shown) for discharging the cooling medium from the circulation flow path It is constituted by a region other than the region in which the LED substrate 23 on the outer surface of the fin body 25A is located. In the present embodiment, a heat sink having a structure in which a cooling medium is used for cooling is disclosed. However, the heat sink may be configured to be forced air-cooled by, for example, a fan such as a heat sink with a fan.

The cylindrical casing 30 is as shown in Fig. 4, and has a body structure without a marginal portion.

In the present specification, the term "the structure of the body having no marginal portion" means that the obtained structure having no joint portion is integrally formed by cutting or the like, or is constituted by a plurality of members, although it has a structure. The joint portion of the members is formed, but the joint portion is formed such that the joint portion has no gap by welding or the like, and has a hermetic structure with respect to the liquid.

In this example, the cylindrical casing 30 is a rectangular tubular shape and has four side portions. However, the four side portions 30A, 30B, 30C, and 30D have a continuous structure and do not have a joint portion and a margin portion. By. Further, in the outer peripheral surface of the cylindrical casing 30, each end edge angle is chamfered. Further, the cylindrical casing 30 of the present embodiment is integrally formed by cutting a metal block, and does not have a joint portion and a margin between the adjacent side portions of the four side portions. In some cases, however, the cylindrical casing is formed by, for example, welding of four plate-like members by welding or the like, and the four joint portions to which the plate-like members are coupled to each other have no gap formed at the joint portion. Also available.

Further, in the cylindrical casing 30, a light source module 20 is housed, and a window member receiving space for receiving the window member 35 in the opening portion of the light is formed.

In this illustration, the window member receiving space is formed by the inner peripheral surface of the light-emitting opening of the cylindrical casing 30 and the window member supporting convex portion 33 which will be described later, and the window member 35 can be disposed outside. The surface 36 is located at a depth that is lower than the height of the front end surface 31 of the tubular casing 30 on the light emission opening side (lower in FIG. 2). Specifically, the depth of the window member receiving space (the distance between the front end surface 31 of the cylindrical casing 30 and the side surface 33A of the window member supporting convex portion 33) is 2 mm.

The cylindrical case 30 is a structural member to be accommodated therein, and specifically, a suitable shape of the light source module 20 and the window member 35, but the thickness thereof is particularly used in the case where the plurality of light source units 10 are arranged. In order to make the window member 35 of the light source unit 10 adjacent to each other close to each other, it is preferable to suppress the light-emitting discontinuous area from becoming large (for example, 2.5 mm or less).

In this illustration, the cylindrical casing 30 has a larger thickness around the inner peripheral surface-related portion of the receiving space of the window member than the other portions, and the thickness of the relevant portion of the inner peripheral surface surrounding the receiving space of the window member is 3.4 mm. . Further, regarding the thickness of the other portion (the portion other than the portion related to the inner peripheral surface of the receiving space of the window member), the thickness of the side surface (side surface portions 30A, 30C) of the short side is preferably small, but the side of the long side (side surface) The parts 30B, 30D) need to maintain mechanical strength, so the thickness of the side of the long side is thinner than the side of the short side. The thickness is also large. For example, the thickness of the side surface of the long side can be set to 2 mm, and the thickness of the side surface of the short side can be set to 1.5 mm.

As the material of the cylindrical case 30, a metal or a resin having chemical resistance to an organic solvent used for removing adhering matter (soil) adhering to the outer surface 36 of the window member 35 is used. Specifically, for example, aluminum or the like can be mentioned.

In this illustration, the outer peripheral surface of the cylindrical casing 30 is comprehensive, and a black alumite treatment is applied from the viewpoint of preventing scattering of light. Further, on the inner circumferential surface of the cylindrical casing 30, the light path from the LED element 22 constituting the light source module 20 reaches the light path region fixed to the window member 35 of the light emission opening portion (hereinafter also referred to as "light" The path surrounding surface is applied by mirror processing from the viewpoint of radiating light from the LED element 22 constituting the light source module 20 from the window member 35 with high efficiency.

Further, in the cylindrical casing 30, the window member supporting convex portion 33 is provided on the inner peripheral surface of the light radiating opening portion, and the surface of the window member supporting convex portion 33 from the LED element constituting the light source module 20 The light in the light-shielding state of the light-shielding state of 22 is bonded to the window member 35 by the adhesive (hereinafter also referred to as "the adhesive for fixing the window member"), and is supported by the window member 35. The window member 35 is fixed to the light emitting opening.

The window member supporting convex portion 33 is formed by a rectangular annular flange portion extending along the inner peripheral edge 31A of the distal end of the light emitting opening that surrounds the inner circumferential surface of the light emitting opening, and is perpendicular to the cylindrical shape. Inner peripheral surface of the housing 30 The direction of the protrusion is a quadrangular shape.

Then, as shown in FIG. 5, the peripheral portion of the inner surface 37 of the window member 35 is located on the inner peripheral surface of the cylindrical casing 30 perpendicular to the surface of the window member supporting convex portion 33, that is, the window member is supported. The side surface of the convex portion 33 on the front side (the upper side in FIG. 5) of the light emission direction (hereinafter also referred to as "window member mounting surface") 33A is formed on the peripheral portion of the inner surface 37 of the window member 35. The window member fixing adhesive layer 45 formed of the window member fixing adhesive is formed in the gap between the window member mounting surfaces 33A. The window member fixing adhesive layer 45 is formed only in the region on the window member mounting surface 33A in which the light from the LED element 22 constituting the light source module 20 is shielded from light on the surface of the window member supporting convex portion 33. It is not formed in a region other than the window member mounting surface 33A, that is, a region irradiated with light from the LED elements 22 constituting the light source module 20.

In this illustration, the window member supporting projection 33 is integrally provided to the cylindrical casing 30, and the window member supporting projection 33 and the cylindrical casing 30 have an integral structure with no marginal portion. Further, in the present embodiment, the cylindrical member 30 integrally provided by the window member supporting convex portion 33 is formed by cutting the metal block without the joint portion, but the joint is even joined by welding or the like. The plate-like member may have an integral structure in which the window member supporting convex portion and the cylindrical casing form an infinite portion.

In addition, a region other than the window member mounting surface 33A surrounding the window member receiving space of the surface of the window member supporting convex portion 33, specifically, the side surface 33B and the front end on the rear side (the lower side in FIG. 5) in the light emission direction The surface 33C is the same as the light path surrounding surface of the cylindrical casing 30, and is subjected to mirror finishing. .

The dimension perpendicular to the direction of the inner circumferential surface of the cylindrical casing 30 of the window member supporting convex portion 33 (hereinafter also referred to as "projecting height") is such that the window member supporting convex portion 33 can sufficiently support the fixed window The member 35, and, if necessary, the annular seal portion 40 is preferably not sized to be irradiated with light from the plurality of LED elements 22 constituting the light source module 20.

In this illustration, the protruding height of the window member supporting convex portion 33 is 2.1 mm from the inner circumferential surface of the cylindrical casing 30 surrounding the window member receiving space, and the protruding height from the light path surrounding surface is 3 mm.

As the window member fixing adhesive for fixing the window member 35, the material of the window member supporting convex portion 33, the material of the window member 35, and the material of the cylindrical casing 30 are required to be suitable, but The workability of the window member fixing adhesive 33 applied to the window member mounting surface 33A of the window member supporting convex portion 33 is preferable, and a low viscosity is preferable, and for example, a silicone rubber-based adhesive or the like can be used.

As a specific example of the silicone rubber-based adhesive, for example, "KER-2600 (A/B)" and "KER-2500 (A/B)" (any one is manufactured by Shin-Etsu Chemical Co., Ltd.) Such as the heat hardener.

As shown in FIG. 6, the window member 35 is, for example, a flat plate having a thickness of 1.75 mm, and is accommodated in a window member receiving space in the light-emitting opening portion of the cylindrical casing 30, and can block the light emission of the cylindrical casing 30. The form of the opening has a shape suitable for the light emitting opening portion.

In the illustrated example, the window member 35 has a rectangular flat plate having a horizontal and vertical dimension that is only slightly smaller than the horizontal and vertical dimensions of the light-emitting opening of the cylindrical casing 30, as shown in the figure. As shown in Fig. 5, the outer peripheral surface 38 is disposed on the inner side of the inner peripheral surface of the window member receiving space surrounding the cylindrical casing 30 over the entire circumference, and the outer peripheral surface 38 of the window member 35 is surrounded by the cylindrical shape. A gap is formed between the inner peripheral surfaces of the receiving space of the window member of the casing 30, covering the entire circumference thereof. Further, in this gap, the window member fixing adhesive layer 45 is formed in the region (inner side region) on the rear side (the lower side in FIG. 5) in the light emission direction, and is also on the front side in the light emission direction (Fig. In the area on the upper side of the fifth side (the area on the outer side), the caulking material is filled as will be described later. Further, the region of the adhesive member layer 45 for forming the window member in this gap is not irradiated with direct light from the LED element 22 constituting the light source module 20.

As the material of the window member 35, light transmission having light transmissive from the LED element 22 constituting the light source module 20 is used, and has an attachment (dirt) for removing the outer surface 36 attached to the window member 35. A glass or resin that is resistant to chemicals using an organic solvent. Specifically, for example, borosilicate glass or the like can be mentioned.

Further, the window member 35 is chamfered at the edge angle of the front side (upper side in FIG. 6(b)) of the light emission direction, and is formed between the outer surface 36 and the outer peripheral surface 38 so as to cover the entire circumference thereof. The corner surface 39 constitutes a peripheral portion of the window member 35 by the chamfered surface 39 and the outer peripheral surface 38.

In the illustration, the window member 35 is subjected to a 45 degree chamfering process, and the thickness of the relevant portion of the outer peripheral surface 38 (the distance between the inner surface 37 and the chamfered surface 38) is 0.75 mm.

Then, the window member 35 and the cylindrical casing are formed by the peripheral portion of the window member 35 and the inner peripheral surface surrounding the receiving space of the window member of the cylindrical casing 30. At the margin of this 30, a gap formed between the peripheral portion of the window member 35 and the inner peripheral surface of the receiving space of the window member surrounding the cylindrical casing 30 is formed by covering the entire circumference thereof. The caulking groove 42 of the caulking material is filled.

By forming the caulking groove 42 by the margin of the window member 35 and the cylindrical casing 30, the position at which the annular seal portion 40 is formed, its size, and the like can be controlled, and for this purpose, it is possible to prevent the light source mold from being radiated through the window member 35. The light rays of the LED elements 22 of the group 20 are blocked because the annular seal portion 40 is blocked.

The caulking groove 42 is preferably a shape in which the groove width becomes smaller as the groove depth becomes larger, from the viewpoint of the workability of filling the caulking material and the positioning of the window member 35.

Further, the groove depth of the caulking groove 42 is preferably 0.9 to 1.75 mm.

In the illustrated example, the caulking groove 42 is formed by the inner peripheral surface of the receiving space surrounding the window member of the cylindrical casing 30, the chamfered surface 39 of the window member 35, and the light of the outer peripheral surface 38 continuous with the chamfered surface 39. The gap between the areas on the front side of the radial direction is formed. The larger the groove depth is, the smaller the groove width is, and the cross-sectional shape is a slightly right-angled triangle. The maximum groove width is 1 mm, the minimum groove width is 0.1 mm, and the maximum groove depth is (The maximum groove depth from the outer surface 36 of the window member 35) is 1.75 mm.

The annular seal portion 40 is formed at the margin of the cylindrical casing 30 and the window member 35, and is used to cover the margin of the inner peripheral surface of the opening portion and the peripheral portion of the window member 35 by the light of the cylindrical casing 30. The gap between the faces is blocked by the outside of the light source unit 10, that is, the inside of the cylindrical casing 30, and the window member 35 and the cylindrical casing 30 are blocked by the gap. Then in the outer side of the joint portion (the upper side of FIG. 5) to surround the window The peripheral portion of the member 35 is provided.

The annular seal portion 40 is located on the front end surface 31 of the light-emitting opening side of the cylindrical casing 30 from the viewpoint of efficiently using the light from the LED element 22 constituting the light source module 20 radiated through the window member 35. It is preferable that the height of the window member 35 is not covered by the outer peripheral edge 36A in the region of the lower side (the lower side of FIG. 5). Further, from the viewpoint of the unit arrangement, the outer peripheral edge 36A that forms the outer surface 36 of the window member 35 and the inner peripheral edge 31A of the front end surface 31 of the light emitting opening of the cylindrical casing 30 are not covered. It is better.

In the example of the figure, the annular seal portion 40 is formed by filling the caulking material in the caulking groove 42 and located at a lower side than the height of the front end surface 31 of the cylindrical housing 30 on the light emission opening side. In the region, the peripheral edge 41A on the inner side of the annular seal portion 40 is located lower than the height of the outer peripheral edge 36A of the outer surface 36 of the window member 35, and the peripheral edge 41B on the outer side of the annular seal portion 40 is located. The outer peripheral edge 36A of the window member 35 and the inner peripheral edge 31A of the front end of the cylindrical casing 30 cover the entire circumference thereof at a position lower than the height at which the inner peripheral edge 31A of the front end of the light emitting opening of the cylindrical casing 30 is located. status. In such a state, when a surface such as a light-irradiating object is brought into contact with the front end 31A of the front end of the cylindrical casing 30 to perform a hardening treatment or the like, a certain distance can be accurately ensured, and a stable irradiation amount can be secured. The advantages.

As a caulking material for forming the annular seal portion 40, liquid impermeability is used, and has a function for removing the adhesion to the window member 35. When the chemical resistance of the organic solvent used for the deposit (dirt) of the outer surface 36 is changed, the light source unit 10 is configured to illuminate the annular seal portion 40 with the light from the LED element 22 constituting the light source module 20. It is preferred to use liquid impermeability and chemical resistance, and to have light resistance (UV resistance).

As a specific example of the caulking material, for example, a polyfluorene-based caulking material or the like can be used, and as a specific example of the polyfluorene-based caulking material, for example, "S-45W" (Shin-Etsu Chemical Industry Co., Ltd.) "1", such as "TOSSEAL381W" (made by Momentive Performance Materials Japan Co., Ltd.), "TSE3261-G" (made by Momentive Advanced Materials Japan Co., Ltd.) Ingredients that are thermosetting.

According to the light source unit 10 configured as above, the cylindrical casing 30 according to the fixed window member 35 has a body structure having no marginal portion, and the margin of the window member 35 and the cylindrical casing 30 covers the entire circumference of the margin, An annular seal portion 40 formed of a liquid-impermeable filler material is formed on the outer peripheral surface of the cylindrical casing 30, and there is no gap between the outer portion and the inner portion of the cylindrical casing 30, and the window member 35 and the margin of the cylindrical casing 30 are formed on the outer peripheral surface 38 of the marginal window member 35 and the peripheral edge portion formed by the chamfered surface 39, and the inside of the receiving space of the window member surrounding the cylindrical casing 30. Between the circumferential surfaces, and the gap between the external portion and the inside of the cylindrical casing 30 is sealed by the liquid sealing material constituting the annular sealing portion 40, and the frame formed by the cylindrical casing 30 fixing the window member 35 is formed. The shape becomes a structure having a high waterproof structure, and is obtained in a portion of the window member 35 formed by the frame body. High water resistance.

Therefore, since the light source unit 10 has high water repellency due to the arrangement portion of the window member 35, even if the arrangement portion of the window member 35 is immersed in the liquid for a long period of two hours, the liquid does not enter the cylinder. The inside of the casing 30.

Further, the light source unit 10 is in a state in which the gap formed between the window member 35 and the cylindrical casing 30 is sealed by the caulking material constituting the annular seal portion 40, and the gap is not caused by the foreign matter or The harmful effects of dirt intrusion.

In the light source unit 10, the window member 35 is then joined to the window member mounting surface 33A of the window member supporting convex portion 33 provided on the inner circumferential surface of the cylindrical casing 30 by the window member fixing adhesive. In the window member mounting surface 33A, as shown in FIG. 7, the light from the LED element 22 constituting the light source module 20 is shielded by the side surface 33B and the front end surface 33C of the window member supporting convex portion 33, so that the window member is fixed. The window member fixing adhesive for 35 is not irradiated with light (ultraviolet light). Here, in FIG. 7, an example of the light path of the light from the LED element 22 is revealed by an arrow, and the light path L1 is an example of the light path of the light that emits light from the LED element 22 toward the window member 35, the light path L2 The light path L3 is directed from the LED element 22 toward the window member support projection from the LED element 22 toward the front end surface 33C of the window member supporting convex portion 33 in the direction of the light path of the light reflected in the front end surface 33C. An example of the light path of the light reflected in the side surface 33B of the portion 33 of the portion 33 is illuminated.

Moreover, since the subsequent joint portion of the window member 35 is located at the annular seal portion On the inner side of 40, even if the arrangement portion of the window member 35 of the light source unit 10 is immersed in the liquid, the window member fixing adhesive for the fixed window member 35 does not come into contact with the liquid.

Therefore, according to the light source unit 10, even if the adhesive for fixing the window member does not have light resistance to ultraviolet light and liquid impermeability, there is no deterioration of the adhesive for fixing the window member due to irradiation with ultraviolet light or liquid. Therefore, the adhesion between the cylindrical case 30 and the window member 35 can be maintained in a state where the adhesive performance of the adhesive for fixing the window member is lowered, and as a result, the window member 35 and the cylindrical member are maintained by the annular seal portion 40. Since the margin of the casing 30 is sealed by the liquid, high water repellency can be obtained for a long period of time in the arrangement portion of the window member.

The light source unit 10 can be used for a fixing light source for fixing a photocurable ink to a printing object such as paper, or for use in a photocuring device, for a photocurable inkjet printing device. A light source for curing which cures a resin composition containing a photocurable resin.

In other words, even if the light source unit 10 is used as a light source for fixing the ink or a light source for curing the resin composition, the dirt adheres to the window member 35, and the organic solvent does not enter the cylindrical case. For example, the LED element 22 constituting the light source module 20 is short-circuited, etc., and the arranging portion of the window member of the light source unit 10 is immersed in the organic solvent, whereby the outer surface of the window member 35 to which the dirt is attached can be attached. 36 The entire surface is immersed in an organic solvent for a certain period of time to wash the dirt. Further, dirt such as dust does not enter the gap formed between the window member 35 and the margin of the cylindrical casing 30, and is used to wipe the adhesion by using a cloth with an organic solvent. The dirt removed from the window member 35 during the operation of the dirt of the window member 35 does not enter, so that there is no disadvantage that dust or dirt enters the gap.

The light source unit of the present invention is not limited to the above embodiment, and various modifications can be applied.

For example, the window member supporting convex portion is not limited to the entire circumference of the inner peripheral surface of the light emitting opening, as long as it can sufficiently support the fixed window member, and is not integrated with the cylindrical casing. can.

Further, the caulking groove is not limited to being formed by chamfering the edge angle of the front side of the window member in the light emission direction as long as it can fill the gap between the window member and the cylindrical casing. The inner peripheral surface of the window member receiving space surrounding the tubular casing may be formed in a tapered shape, and the inner peripheral surface of the window member surrounding the tubular casing may be provided. It may be formed in a tapered shape and chamfering the edge angle of the front side of the window member in the light emission direction.

10‧‧‧Light source unit

15‧‧‧ Cover members

17‧‧‧Power supply connector

18‧‧‧Shell

18A‧‧‧Plate members

19‧‧‧ Screw components

20‧‧‧Light source module

22‧‧‧LED components

23‧‧‧LED substrate

25‧‧‧ Heat sink

25A‧‧‧ Heat sink body

30‧‧‧Cylindrical shell

30A, 30B, 30C, 30D‧‧‧ side section

31‧‧‧ front end

31A‧‧‧The inner periphery of the front end

33‧‧‧Window member support projection

33A, 33B‧‧‧ side

33C‧‧‧ front face

35‧‧‧Window components

36‧‧‧ outer surface

36A‧‧‧ outer periphery

37‧‧‧ inner surface

38‧‧‧ outer perimeter

39‧‧‧Chamfered surface

40‧‧‧Annual seal

41A, 41B‧‧‧ Periphery

42‧‧‧filling trench

45‧‧‧Binder component fixing adhesive layer

Fig. 1 is a perspective view for explaining an example of a configuration of a light source unit of the present invention.

Fig. 2 is a partially enlarged cross-sectional view for explaining the internal structure of a cylindrical casing of the light source unit of Fig. 1.

FIG. 3 is a perspective view for explaining an explanation of a light source module constituting the light source unit of FIG. 1. FIG.

4] FIG. 4 is a view for explaining a cylindrical casing constituting the light source unit of FIG. 1, (a) a perspective view for explaining a cylindrical casing, and (b) a cylindrical casing. The description uses an enlarged sectional view.

Fig. 5 is an enlarged cross-sectional view showing the structure of the margin of the cylindrical casing and the window member of the light source unit of Fig. 1.

Fig. 6 is an explanatory view showing a window member constituting the light source unit of Fig. 1, (a) a perspective view for explaining a window member, and (b) an enlarged cross-sectional view for explaining a window member.

Fig. 7 is an explanatory view showing a light path of light rays from LED elements constituting the light source module of the light source unit of Fig. 1.

20‧‧‧Light source module

22‧‧‧LED components

23‧‧‧LED substrate

25‧‧‧ Heat sink

30‧‧‧Cylindrical shell

30B, 30D‧‧‧ side section

31‧‧‧ front end

31A‧‧‧The inner periphery of the front end

33‧‧‧Window member support projection

33A, 33B‧‧‧ side

33C‧‧‧ front face

35‧‧‧Window components

36‧‧‧ outer surface

37‧‧‧ inner surface

40‧‧‧Annual seal

Claims (3)

A light source unit characterized in that: a light source module including an LED substrate on which a plurality of LED elements are arranged; and a LED case having a structure of an infinite portion, radiating an LED from the light source module via a window member The light member of the element is disposed in a manner that the window member is fixed to the opening of one of the cylindrical casings and has a translucent window member; The cylindrical casing and the entire circumference of the window member form an annular seal portion formed of a liquid-impermeable filler material. The light source unit according to the first aspect of the invention, wherein the window member supporting convex portion is provided on an inner circumferential surface of the opening of the cylindrical casing; and the surface of the window member supporting convex portion is provided The window member is bonded to the front side region in the light emission direction in a state where the light of the LED element constituting the light source module is shielded from light. The light source unit according to claim 1 or 2, wherein a gap between the cylindrical casing and the window member is formed to fill a caulking material.