TW201537089A - Light irradiation unit and light irradiation device - Google Patents

Abstract

The present invention provides a light irradiation unit featuring easy assembly and installation and emitting linear irradiation light, and a light irradiation device using the same. The light irradiation unit includes a substrate; N light sources arranged at a specific interval in a first direction on the substrate; N lenses respectively arranged on optical paths of the light sources; a lens storage part receiving the N lenses at the same time by supporting a periphery of an edge part at a first surface side of each lens; and a lens pressing part projecting beyond a second surface of each lens and elastically pressing a periphery of an edge part at the second surface side and has N sets of first and second tongue parts enabling each lens to apply a force to the lens storage part. The lens storage part allows each lens to be rotatably supported. A convex surface having a positive refractive power is formed at the second surface side of each lens on a second direction orthogonal to the first direction. A front end of at least one of the first and second tongue parts has a shape corresponding to a surface shape on the first direction of the second surface of each lens.

Description

Light irradiation unit and light irradiation device

The present invention relates to a light irradiation unit that illuminates linear light and a light irradiation device using the same.

Conventionally, as the ink for offset sheet offset printing, an ultraviolet curable ink which is cured by ultraviolet light irradiation is used. Further, as a binder for a periphery of a flat panel display FPD (Flat Panel Display) such as a liquid crystal panel or an organic electroluminescence EL (Electro Luminescence) panel, an ultraviolet curable resin is used. In the curing of such an ultraviolet curable ink or an ultraviolet curable resin, although an ultraviolet light irradiation device that irradiates ultraviolet light is generally used, in particular, in sheetfed offset printing and FPD use, it is required to irradiate a wide irradiation. Since the area is used, an ultraviolet light irradiation device that irradiates linear irradiation light is used.

As an ultraviolet light irradiation device, a lamp type irradiation device using a high-pressure mercury lamp, a mercury xenon lamp, or the like as a light source has been conventionally known, but in recent years, from the viewpoint of reducing power consumption, increasing service life, and compactness of device size, In the conventional discharge lamp, an ultraviolet light irradiation device using a light emitting diode (Light Emitting Diode) as a light source has been developed. Such an ultraviolet light irradiation device is described, for example, in Patent Documents 1 and 2.

The ultraviolet light irradiation device (linear light illumination device) described in Patent Document 1 includes a light-emitting unit in which one LED package is mounted on a strip-shaped printed circuit board, and a long bar provided on an upper portion of the light-emitting unit The lens is configured to linearly condense ultraviolet light emitted from the LED package through a rod lens, thereby obtaining linear illumination light.

The ultraviolet light irradiation device (irradiation module) described in Patent Document 2 includes a plurality of body units having LEDs and a cylindrical lens disposed in the LED light path. Each of the main body units constitutes ultraviolet light emitted from the LED through the linear absorption of the cylindrical lens, and a plurality of main body units are arranged at a predetermined interval, and the long-line illumination light can be emitted from the ultraviolet light irradiation device.

Patent Document 1: Japanese Laid-Open Patent Publication No. 2013-143350. Patent Document 2: JP-A-2013-210422

According to the ultraviolet light irradiation device described in Patent Document 1, linear illumination light corresponding to the number of LED packages and the length of the rod lens can be obtained. However, in sheetfed offset printing, paper of various sizes is used, and various sizes of components exist in the FPD, and therefore, the required illumination light lengths are also different, each time corresponding to the required specifications, When changing the number of LED packages and the length of the rod lens, there is a problem that it is necessary to re-optimize the design.

Further, as in the configuration described in Patent Document 1, when a long rod lens and a cylindrical lens are used, it is necessary to produce a dedicated model corresponding to the required specifications, thereby causing a rod lens and a cylindrical lens. The price is extremely high. Further, the longer the length of the rod lens and the cylindrical lens, the more easily the yarn is broken, and therefore the handling and assembly work processes become complicated.

The ultraviolet irradiation device described in Patent Document 2 can solve the above problems by a structure in which ultraviolet light emitted from a plurality of main unit units is joined in a line. However, as described in Patent Document 2, it is necessary to perform alignment adjustment of each of the main body units so that the ultraviolet light emitted from each of the main unit units is arranged in a line.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a light irradiation unit that emits linear irradiation light that can be easily assembled and installed, and a light irradiation device using the same.

In order to achieve the above object, the light irradiation unit of the present invention is a light irradiation which is extended in a first direction on an irradiation surface and which irradiates linear light having a specific line width in a second direction orthogonal to the first direction. a unit having: a substrate; N (N is an integer of 2 or more) light sources aligning directions of the optical axes in a third direction orthogonal to the first direction and the second direction, and along the substrate The first direction is arranged side by side at a predetermined interval; the N lenses have a circular shape when viewed from the third direction and are disposed in the optical path of each light source; and the lens housing portion supports the edge of the first surface side of each lens N lenses are accommodated around the portion; the lens pressing portion protrudes from the second surface of each lens so as to be sandwiched from the second direction, and the lens pressing portion elastically presses the edge portion of the second surface side of each lens In the periphery, the first and second tongue portions that bias the respective lenses toward the lens housing portion are pressed, and the lens housing portion rotatably supports the lenses in a plane defined by the first direction and the second direction. Lens storage a plurality of lenses are rotatably supported on a plane defined by the first direction and the second direction, and convex surfaces having positive refractive power in at least the second direction are formed on the second surface side of each lens, first and first The front end of at least one of the two tongue portions has a shape corresponding to the surface shape of the first direction of the second surface of each lens.

According to this configuration, the fixing and positioning of the plurality of lenses can be performed at one time, and thus it is possible to provide a light irradiation unit that is easy to assemble and set.

Further, the second surface of each of the lenses is a cylindrical surface, and at least one of the first and second tongue portions may have a straight portion parallel to a first direction in contact with the cylindrical surface. Further, in this case, the straight portions are preferably separated and formed in plural along the first direction. Further, at least the other of the first and second tongue portions are independently and movable in the third direction, and are capable of having a plurality of front end portions in point contact with the cylindrical surface. According to this configuration, it is possible to easily align the focal lines of the cylindrical surface into the same straight line.

Further, the second surface of each lens is a cylindrical surface, and at least one of the first and second tongue portions is integrally movable in a third direction, and has a plurality of front end portions in point contact with the cylindrical surface, and can constitute a connection. The virtual straight lines of the front end portions are parallel to the first direction.

Further, the second surface of each lens is a toroidal surface, and at least one of the first and second tongue portions may have a notched portion in which a toric surface is embedded. According to this configuration, the directions in which the toric surfaces are directed can be easily aligned in the same straight line.

Further, the first face of each lens may be any one of a concave surface, a convex surface, or a flat surface.

Further, the light source may be composed of at least one LED (Light Emitting Diode) element.

Further, the light may be light including a wavelength acting on the ultraviolet curable resin.

Further, from another viewpoint, the light irradiation device of the present invention includes a plurality of the above-described light irradiation units, and the plurality of light irradiation units are arranged in a rectangular frame shape on a specific reference plane.

As described above, according to the present invention, it is possible to realize a light irradiation unit that emits linear irradiation light, which is easy to assemble and install, and a light irradiation device using the same.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, the same reference numerals are given to the same or corresponding parts in the drawings, and the description is not repeated here. (First embodiment)

Fig. 1 is an external perspective view of a UV irradiation unit according to a first embodiment of the present invention. 2 is a plan view of the UV irradiation unit 1 according to the first embodiment of the present invention, and FIG. 3 is a cross-sectional view of the UV irradiation unit 1 according to the first embodiment of the present invention taken along line A-A of FIG. 2 . The UV irradiation unit 1 of the present embodiment is a light source device that is mounted on an ultraviolet curable ink that can be used for offset printing of sheetfed paper and an ultraviolet curable resin that is used as a binder for FPD (Flat Panel Display). In the device, the light source device is disposed above the object to be irradiated, and emits linear ultraviolet light to the object to be irradiated. In the present specification, as indicated by the coordinates in FIG. 1, the direction in which the LED (Light Emitting Diode) element 20 described later emits ultraviolet light is defined as the X-axis direction, and the direction in which the LED elements 20 are arranged is defined as Y. The direction orthogonal to the X-axis direction and the Y-axis direction is defined as the Z-axis direction and will be described.

As shown in FIGS. 1 to 3, the UV irradiation unit 1 of the present embodiment includes two main body units 100, a heat radiation member 300, and a thin box-shaped case 200 that houses the two main body units 100 and the heat radiation member 300. The two main units 100 are units for emitting linear ultraviolet light arranged in parallel in the Y-axis direction in the X-axis direction, and the two main units 100 are arranged in the Y-axis direction and housed in the casing. Further, between the two body units 100, an adjustment member 250 for adjusting the interval between the body units 100 is provided. The heat radiation member 300 is a cooling mechanism (for example, a heat sink) for discharging heat generated in the main body unit 100, and is abutted and disposed on the lower side of each of the main body units 100 (negative direction of the X-axis).

As shown in FIG. 3, each of the main body units 100 includes a rectangular substrate 10 elongated in the Y-axis direction, four LED elements 20 having the same characteristics, and four spherical lenses 30 disposed on the optical axes of the respective LED elements 20. The four cylindrical lenses 40 disposed on the optical axis of each of the spherical lenses 30, the spherical lens housing portion 31 and the spherical lens pressing portion 32 of the fixed spherical lens 30, and the cylindrical lens housing portion 41 and the column of the fixed cylindrical lens 40 The surface lens pressing portion 42.

In a state where the optical axes are aligned in the X-axis direction, a row of four LED elements 20 are arranged on the substrate 10 at a predetermined interval in the Y-axis direction, and are electrically connected to the substrate 10. The substrate 10 is connected to an LED driving circuit (not shown), and each LED element 20 is supplied with a driving current from the LED driving circuit via the substrate 10. When a drive current is supplied to each of the LED elements 20, ultraviolet light corresponding to the amount of light of the drive current is emitted from each of the LED elements 20, and linear ultraviolet light arranged in parallel in the Y-axis direction is emitted from each of the main body units 100. Further, each of the LED elements 20 in the present embodiment adjusts the drive current supplied to each of the LED elements 20 so as to emit ultraviolet light of substantially the same amount of light, and the linear ultraviolet light emitted from each of the main unit units 100 is in the Y-axis direction. It has a substantially uniform distribution of light amount. Further, each of the LED elements 20 in the present embodiment includes an LED chip (not shown) having a substantially square light-emitting surface, and receives supply of a drive current from the LED drive circuit, and emits ultraviolet light having a wavelength of 365 nm.

The spherical lens 30 is a circular plano-convex lens having a planar first surface 30a and a spherical second surface 30b to reduce the divergence angle of the ultraviolet light incident from the LED element 20 into the first surface 30a to form a specific divergence angle ultraviolet Light is emitted from the second surface 30b (Fig. 7). Although the spherical lens 30 is housed in the spherical lens housing portion 31 of the substrate 10 and is pressed to the side of the LED element 20 by the spherical lens pressing portion 32, it is fixed in the spherical lens housing portion 31 ( Figure 7).

The cylindrical lens 40 is a circular plano-convex lens having a planar first surface 40a and a cylindrical second surface 40b (Fig. 7). Further, each of the cylindrical lenses 40 of the present embodiment has the same shape and optical characteristics, and forms a specific gap with the spherical lens 30 so that the focal line faces the Y-axis direction, and is disposed in the corresponding LED element 20 and the spherical lens 30. On the optical axis. Although described in detail later, each of the cylindrical lenses 40 is housed in the cylindrical lens housing portion 41 attached to the substrate 10, and is pressed to the spherical lens 30 side by the cylindrical lens pressing portion 42, and is fixed to the cylindrical lens. Inside the accommodating portion 41 (Fig. 7).

As described above, the cylindrical lens 40 of the present embodiment does not have a refractive power in the focal line direction (that is, the Y-axis direction), and has a refractive power in a direction perpendicular to the focal line (that is, the Z-axis direction). Therefore, the light emitted from the LED element 20 is incident on the first surface 40a of the cylindrical lens 40 by the ultraviolet light of the spherical lens 30, and is collected in the Z-axis direction and emitted from the second surface 40b. Then, the ultraviolet light emitted from each of the cylindrical lenses 40 and the ultraviolet light emitted from the adjacent cylindrical lens 40 overlap in the Y-axis direction, and are emitted from the respective main body units 100 in the Y-axis direction, and have a Z-axis direction. A linear ultraviolet light of a specific line width. Furthermore, in the present embodiment, the interval between the two adjacent LED elements 20 via the adjustment member 250 is set to be the same as the interval between the four LED elements 20 of the respective body units 100. Therefore, each of the linear ultraviolet light emitted from the two body units 100 is connected in a substantially uniform light amount distribution in the Y-axis direction. In addition, as shown in FIG. 2 and FIG. 3, a cover 50 having an opening corresponding to the cylindrical lens 40 is attached to the light irradiation surface (Z-axis positive direction surface) of each main unit 100 of the present embodiment.

Fig. 4 is a plan view showing an example of a UV irradiation device 1000 which is combined and configured by the UV irradiation unit 1 described above. As shown in FIG. 4, the UV irradiation device 1000 is configured by arranging four UV irradiation units 1 in a rectangular frame shape on a specific plane. According to this configuration, for example, it is possible to illuminate the irradiation region on the four sides of the rectangular illumination object located on the liquid crystal panel or the like with rectangular linear ultraviolet light. Further, as described above, the UV irradiation unit 1 of the present embodiment connects the plurality of body units 100 in a straight line. Thus, by increasing or decreasing the number of connected body units 100, or combining the number of the LED elements 20, the spherical lenses 30, and the cylindrical lenses 40 (i.e., different lengths), the body unit 100 can correspond to liquid crystal panels of various sizes.

As described above, in each of the main body units 100 of the present embodiment, the focal lines of the respective cylindrical lenses 40 are positioned so as to face the Y-axis direction. Here, the positioning mechanism of each cylindrical lens 40 which is a characteristic structure of the present invention will be described in detail with reference to FIGS. 5 to 7. Fig. 5 is a plan view of the cylindrical lens housing portion 41, and Fig. 6 is a plan view of the cylindrical lens pressing portion 42. Further, Fig. 7 is a cross-sectional view of the UV irradiation unit 1 taken along the line B-B in Fig. 2 .

The cylindrical lens accommodating portion 41 is a member formed of a metal such as aluminum, and is fixed to the substrate 10 by screwing or the like (Fig. 3). As shown in FIG. 5, in the cylindrical lens housing portion 41, circular recesses 410 for accommodating the cylindrical lenses 40 are formed at four locations at specific intervals. The inner diameter of the concave portion 410 is only slightly larger than the outer diameter of the cylindrical lens 40. Further, a circular opening 415 for passing ultraviolet light emitted from the LED element 20 is formed in the bottom portion 410a of the concave portion 410. Further, as a material of the cylindrical lens housing portion 41, instead of a metal such as aluminum, polyether ether PEEK (Poly-Ether-Ether-Ketone), polyphenylene sulfide PPS (Poly Phenylene Sulfide), polyether ketone ether can be used. Ketoneketone PEKEKK (Poly-Ether-Ketone-Ether-Ketone-Ktone), polyanidimide PAI (Polyanid Imide), polyamidamine PI (Polyimide), polyether oxime PES (Poly Ether Sulfone), etc., heat resistant An organic resin material excellent in properties and ultraviolet resistance.

The four cylindrical lenses 40 are respectively housed in the four concave portions 410 of the cylindrical lens housing portion 41. Then, when each of the cylindrical lenses 40 is housed in the concave portion 410, as shown in FIG. 7, the periphery of the edge portion of the first surface 40a of the cylindrical lens 40 is supported by the bottom portion 410a of the concave portion 410. In the present embodiment, when each of the cylindrical lenses 40 is housed in the concave portion 410, each of the cylindrical lenses 40 is formed in the cylindrical lens housing portion 41 in a specific plane formed by the Y-axis direction and the Z-axis direction. The upper is rotatable.

The cylindrical lens pressing portion 42 is a member that is attached to the upper surface of the cylindrical lens housing portion 41 and is formed of a thin metal plate such as stainless steel. As shown in FIG. 6, in the cylindrical lens pressing portion 42, a substantially circular opening 420 through which ultraviolet light emitted from the cylindrical lens 40 passes is formed at four positions with a predetermined interval therebetween. The diameter of the opening 420 is only slightly larger than the outer shape of the cylindrical lens 40, and a pair of tongue portions 421a and 421b protruding toward the center of the opening 420 are formed on both sides of the opening 420 in the Z-axis direction. The tongue portions 421a and 421b have a substantially rectangular shape having a long side in the Y-axis direction, and are formed to face each other in the Z-axis direction. Further, on both sides of the tongue portions 421a and 421b in the Y-axis direction, a slit 421c that causes the tongue portion 421a and the tongue portion 421b to elastically extend in the Z-axis direction is formed, and the cylindrical lens pressing portion 42 is attached. At this time, the tongue portions 421a and 421b abut against the second surface 40b of the cylindrical lens 40, and are pushed and bent in the positive direction of the X-axis. Further, at the tips of the tongue portions 421a and 421b of the present embodiment, straight portions 421as and 421bs which are respectively parallel to the Y-axis direction are formed.

As shown in FIG. 7, the cylindrical lens pressing portion 42 is attached to the substrate 10 by screwing or the like together with the cylindrical lens housing portion 41 that houses the cylindrical lens 40. When the cylindrical lens pressing portion 42 is attached, the tongue portions 421a and 421b protrude from the second surface 40b of the cylindrical lens 40, and the straight portions 421as and 421bs press the periphery of the edge portion of the second surface 40b. When the second surface 40b of the cylindrical lens 40 (i.e., the cylindrical surface) is pressed by the linear portion 421as of the tongue portion 421a and the linear portion 421bs of the tongue portion 421b, the stress is applied to the second surface of the cylindrical lens 40. The front end portion of the surface 40b (that is, the top portion of the cylindrical surface) is fitted between the straight portion 421as and the straight portion 421bs to rotate the cylindrical lens 40. Then, in a state where the tip end portion of the second surface 40b of the cylindrical lens 40 is fitted between the tongue portions 421a and 421b, the cylindrical lens 40 is pressed to the spherical lens 30 side and fixed in the cylindrical lens housing portion 41. . Further, the biasing force of the tongue portions 421a and 421b can be appropriately set according to the size of the cylindrical lens 40, the surface shape of the second surface 40b of the cylindrical lens 40, the shape and material of the tongue portions 421a and 421b, and the like. The size of the cylindrical lens 40 is set to be equal to or larger than the self-weight of the cylindrical lens 40, and the cylindrical lens 40 is not damaged.

As described above, since the straight portions 421as and 421bs parallel to the Y-axis direction are formed at the tips of the tongue portions 421a and 421b of the present embodiment, the front end portion of the second surface 40b of the cylindrical lens 40 is fitted into the tongue. Between the portions 421a and 421b, the focal line of the cylindrical lens 40 is also parallel to the Y-axis direction. As described above, in the present embodiment, the distal end portions of the tongue portions 421a and 421b are formed with straight portions 421as and 421bs parallel to the Y-axis direction, whereby the four cylindrical lenses are pressed by pressing the second surface 40b of each cylindrical lens 40. The focal lines of 40 are configured to face the Y-axis direction and are aligned in the same straight line.

As described above, in the present embodiment, the cylindrical lens 40 disposed in the cylindrical lens housing portion 410 can be pressed only by the cylindrical lens pressing portion 42 having the tongue portions 421a and 421b, so that a plurality of pieces can be fixed at one time. At the same time as the cylindrical lens 40, positioning is performed (i.e., the focal line is aligned and the positioning in the X direction is performed). Therefore, when a plurality of cylindrical lenses 40 are used, it is not necessary to perform individual positioning and fixing, making it easy to assemble and set them.

The above is the description of the embodiment, but the present invention is not limited to the above configuration, and various modifications can be made without departing from the spirit and scope of the invention. For example, although the UV irradiation device 1 of the present embodiment is a device that irradiates ultraviolet light, an apparatus that irradiates irradiation light (for example, visible light of white light, infrared light, or the like) in another wavelength region can be applied to the present invention.

Further, each of the LED elements 20 of the present embodiment has an LED chip having a substantially square light-emitting surface. However, the LED chip 20 is not limited to such a structure. For example, the LED chip of the LED element 20 may have a light-emitting surface other than a square. Further, the LED element 20 may be provided with a plurality of LED chips.

Next, another embodiment of the cylindrical lens pressing portion 42 will be described with reference to Figs. 8 to 12 . In addition, in the embodiment shown in FIG. 8 to FIG. 12, the structure other than the shape of the tongue portion of the cylindrical lens pressing portion is the same as that of the first embodiment, and thus the description thereof is omitted. In addition, in FIGS. 8 to 12, for the sake of simple explanation, only the structure showing the periphery of one cylindrical lens 40 is enlarged. (Second embodiment)

Fig. 8 is a plan view showing a part of the cylindrical lens pressing portion 42A in the second embodiment. The cylindrical lens pressing portion 42A in the present embodiment is different from the cylindrical lens pressing portion 42 in the first embodiment in that the end portions of the tongue portions 422a and 422b have arc-shaped cutout portions 422af and 422bf, respectively. Further, straight portions 422as and 422bs parallel to the Y-axis direction are formed at both ends (portions without slits) of the cutout portions 422af and 422bf, respectively. In the present embodiment, the second surface 40b of the cylindrical lens 40 is pressed by the straight portions 422as and 422bs of the four portions of the tip end portions of the tongue portions 422a and 422b. In the present embodiment, the cylindrical lens 40 is rotated in such a manner that the front end portion of the second surface 40b of the cylindrical lens 40 is fitted between the two straight portions 422as of the tongue portion 422a and the two straight portions 422bs of the tongue portion 422b. And it is fixed to the cylindrical lens accommodating part 41. Therefore, in the cylindrical lens pressing portion 42A of the present embodiment, as in the first embodiment, the focal line of each cylindrical lens 40 can be parallel to the Y-axis direction. (Third embodiment)

Fig. 9 is a plan view showing a part of the cylindrical lens pressing portion 42B in the third embodiment. The cylindrical lens pressing portion 42B in the present embodiment has a pair of tongue-shaped tongue portions 423a and a negative Z-axis which are formed in a positive direction of the Z-axis with a predetermined interval therebetween and arranged in the Y-axis direction. This is different from the cylindrical lens pressing portion 42 of the first embodiment in that the pair of tongue portions 423b are formed in a strip shape which are arranged at a predetermined interval and arranged in the Y-axis direction. The distal end portions of the pair of tongue portions 423a and the pair of tongue portions 423b respectively have straight portions 423as and 423bs parallel to the Y-axis direction, and the pair of tongue portions 423a and the pair of tongue portions 423b are disposed to be opposed in the Z-axis direction. . When the cylindrical lens pressing portion 42B of the present embodiment is attached, the pair of tongue portions 423a and the pair of tongue portions 423b move independently in the X-axis direction, but pass through the pair of tongue portions 423a and a pair. The linear portions 423as and 423bs of the four portions of the distal end portion of the tongue portion 423b press the second surface 40b of the cylindrical lens 40. Therefore, in the present embodiment, the cylindrical lens 40 is fitted into the two straight portions 423as of the pair of tongue portions 423a and the two straight portions of the pair of tongue portions 423b at the distal end portion of the second surface 40b of the cylindrical lens 40. The mode between 423bs is rotated and fixed to the cylindrical lens housing portion 41. Therefore, in the cylindrical lens pressing portion 42B of the present embodiment, as in the first embodiment, the focal line of each cylindrical lens 40 can be parallel to the Y-axis direction. (Fourth embodiment)

Fig. 10 is a plan view showing a part of the cylindrical lens pressing portion 42C in the fourth embodiment. The cylindrical lens pressing portion 42C in the present embodiment has a pair of strip-shaped tongue portions 424a formed in a positive direction of the Z-axis at a predetermined interval and arranged in the Y-axis direction, and a negative direction in the Z-axis. The formed band-shaped tongue portion 424b is different from the cylindrical lens pressing portion 42 of the first embodiment. The tongue portion 424b of the present embodiment passes through the center of the cylindrical lens 40 and is disposed on a virtual straight line parallel to the Z-axis direction, and the pair of tongue portions 424a are symmetrically arranged across the virtual straight line. Further, the front end portions of the pair of tongue portions 424a and the tongue portions 424b have straight portions 424as and 424bs parallel to the Y-axis direction, respectively. When the cylindrical lens pressing portion 42C of the present embodiment is attached, the pair of tongue portions 424a and the tongue portion 424b move independently in the X-axis direction, but the two straight ends of the pair of tongue portions 424a are straight. The straight portion 424bs of the distal end portion of the tongue portion 424a and the tongue portion 424b presses the second surface 40b of the cylindrical lens 40. Therefore, in the present embodiment, the cylindrical lens 40 is fitted between the two straight portions 424as of the pair of tongue portions 424a and one straight portion 424bs of the tongue portion 424b at the distal end portion of the second surface 40b of the cylindrical lens 40. The method is rotated and fixed to the cylindrical lens housing portion 41. Therefore, in the cylindrical lens pressing portion 42C of the present embodiment, as in the first embodiment, the focal line of each cylindrical lens 40 can be parallel to the Y-axis direction. (Fifth Embodiment)

Fig. 11 is a plan view showing a part of the cylindrical lens pressing portion 42D in the fifth embodiment. The cylindrical lens pressing portion 42D in the present embodiment has a pair of tongue portions 425a that are arranged in the Y-axis direction at a predetermined interval in the positive direction of the Z-axis and protrude in an angular direction, and a negative direction in the Z-axis. This is different from the cylindrical lens pressing portion 42 of the first embodiment in that a pair of tongue portions 425b which are arranged in the Y-axis direction and protrude in the angular direction are spaced apart from each other at a predetermined interval. Each of the pair of tongue portions 425a and the pair of tongue portions 425b has straight portions 425as and 425bs parallel to the Y-axis direction, and the pair of tongue portions 425a and the pair of tongue portions 425b are disposed to face each other in the Z-axis direction. When the cylindrical lens pressing portion 42D of the present embodiment is attached, the pair of tongue portions 425a and the pair of tongue portions 425b move independently in the X-axis direction, but in the present embodiment, a pair of tongues are passed. The straight portions 425a and 425bs of the four portions of the portion 425a and the pair of tongue portions 425b press the second surface 40b of the cylindrical lens 40. Therefore, in the present embodiment, the cylindrical lens 40 is fitted into the two straight portions 425a of the pair of tongue portions 425a and the two straight portions of the pair of tongue portions 425b at the distal end portion of the second surface 40b of the cylindrical lens 40. The mode between 425bs is rotated and fixed to the cylindrical lens housing portion 41. Therefore, with the cylindrical lens pressing portion 42D of the present embodiment, as in the first embodiment, the focal line of each cylindrical lens 40 can be parallel to the Y-axis direction. Further, although the pair of tongue portions 425a and the pair of tongue portions 425b of the present embodiment are described as members protruding in an angular shape, the pair of tongue portions 425a and one may be formed as long as the straight portions 425as and 425bs are formed. The front end portion of the tongue portion 425b does not necessarily have to be pointed. (Sixth embodiment)

Fig. 12 is a plan view showing a part of the cylindrical lens pressing portion 42E in the sixth embodiment. The cylindrical lens pressing portion 42E in the present embodiment has a tongue portion 426a having a rectangular shape formed in the positive direction of the Z axis, and is arranged in the Y-axis direction at a predetermined interval in the negative direction of the Z-axis, and is angular. This is different from the cylindrical lens pressing portion 42 of the first embodiment in that the pair of tongue portions 426b are protruded. The tongue portion 426a has a straight portion 426a parallel to the Y-axis direction. In the present embodiment, the second surface 40b of the cylindrical lens 40 is pressed by the straight portion 426as of the tongue portion 426a and the pair of tongue portions 426b. Therefore, in the present embodiment, the cylindrical lens 40 is rotated in such a manner that the distal end portion of the second surface 40b of the cylindrical lens 40 is fitted between the linear portion 426as of the tongue portion 426a and the pair of tongue portions 426b, and is fixed. The cylindrical lens housing portion 41 is provided. Therefore, with the cylindrical lens pressing portion 42E of the present embodiment, as in the first embodiment, the focal line of each cylindrical lens 40 can be parallel to the Y-axis direction.

As described above, in the first to sixth embodiments, the cylindrical lens pressing portions 42, 42A, 42B, 42C, 42D, and 42E that press the cylindrical surface of the cylindrical lens 40 (that is, the second surface 40b) are pressed. The configuration will be described, but the present invention is not limited to the configuration of pressing the cylindrical lens 40. For example, instead of the cylindrical lens 40, an annular lens having a specific curvature in the Y-axis direction may also be used. (Seventh Embodiment)

Fig. 13 is a plan view showing a part of the lens pressing portion 42F in the seventh embodiment of the present invention. The lens pressing portion 42F is configured to press the annular lens 40M having a specific curvature in the Y-axis direction, and the cylindrical lens pressing portions 42, 42A, 42B, 42C, 42D, and 42E in the first to sixth embodiments. different. As shown in Fig. 13, the lens pressing portion 42F of the present embodiment has a pair of tongue portions 427a and 427b which are disposed to face each other in the Z-axis direction. The tongue portions 427a and 427b have a substantially rectangular shape having a long side in the Y-axis direction, but the front end portion is not a straight line but is formed with a surface shape corresponding to the Y-axis direction of the second surface 40Mb of the annular lens 40M ( That is, the arc-shaped cutout portions 427as and 427bs of the curvature). As described above, when the slit portions 427as and 427bs are provided at the tips of the tongue portions 427a and 427b, the annular lens 40M is formed by the annular lens 40M when the second surface 40Mb of the annular lens 40M is pressed by the tongue portions 427a and 427b. The front end portion (i.e., the top portion) of the second surface 40Mb is rotated and fixed in such a manner as to be inserted between the cutout portions 427as and 427bs. Therefore, the lens pressing portion 42F according to the present embodiment is aligned with the respective cylindrical lenses 40 of the first to sixth embodiments, and the direction in which the respective annular lenses 40M are directed can be aligned in the Y-axis direction. (Eighth embodiment)

Fig. 14 is a plan view showing a part of the lens pressing portion 42G in the eighth embodiment of the present invention. As shown in Fig. 14, the lens pressing portion 42G of the present embodiment is different from the lens pressing portion 42F of the seventh embodiment in that V-shaped notch portions 428as and 428bs are formed at the tips of the tongue portions 428a and 428b. In the present embodiment, the virtual straight line connecting the both ends (that is, the front end) of the notch portion 428as of the tongue portion 428a and the virtual straight line of the both ends (ie, the front end) of the notch portion 428bs of the connecting tongue portion 428b are respectively The configuration is parallel to the Y-axis direction, and is configured to pass through both ends of the cutout portion 428as and both ends of the cutout portion 428bs to press the second surface 40b of the annular lens 40M. When both ends of the notch portion 428as and both ends of the notch portion 428bs press the second surface 40Mb of the ring lens 40M, both ends of the notch portion 428as of the tongue portion 428a and both ends of the notch portion 428bs are respectively in the X-axis direction. Moving (ie, lifting), both ends of the notch portion 428as are integrally moved in such a manner that the virtual straight line connecting the both ends is always parallel to the Y-axis direction, and the both ends of the notched portion 428bs are always connected with the virtual straight line connecting the both ends. The Y-axis direction is parallel and moves integrally. Therefore, when the second surface 40Mb of the annular lens 40M is pressed by the both ends of the notch portion 428as and the four ends of the notch portion 428bs, the annular lens 40M is fitted into the notch portion 428as with the front end portion of the second surface 40Mb of the annular lens 40M and The way between 428bs is rotated and fixed. Therefore, according to the lens holding portion 42G of the present embodiment, as in the seventh embodiment, the direction in which the respective annular lenses 40M are directed can be aligned in the Y-axis direction. Further, the configuration of the present embodiment can be applied to a structure in which the cylindrical lens 40 is pressed and aligned in the direction as described in the first to sixth embodiments.

1‧‧‧UV irradiation unit
100‧‧‧ body unit
10‧‧‧Substrate
20‧‧‧LED components
30‧‧‧Spherical lens
30a‧‧‧ first side
30b‧‧‧ second side
31‧‧‧Spherical lens storage unit
32‧‧‧Spherical lens pressing unit
40‧‧‧ cylindrical lens
40a‧‧‧ first side
40b‧‧‧ second side
40M‧‧‧ ring lens
40Mb‧‧‧ second side
41‧‧‧Cylindrical lens storage unit
42, 42A, 42B, 42C, 42D, 42E‧‧‧ cylindrical lens pressing unit
42F, 42G‧‧‧ lens pressing
410‧‧‧ recess
410a‧‧‧ bottom
415‧‧‧ openings
420‧‧‧ openings
421a, 412b, 422a, 422b, 423a, 423b, 424a, 424b, 425a, 425b, 426a, 426b, 427a, 427b, 428a, 428b‧‧ ‧ tongue parts
421as, 421bs, 422as, 422bs, 423as, 423bs, 424as, 424bs, 425as, 425bs, 426as‧‧
421c ‧‧‧ gap
422af, 422bf, 427as, 427bs, 428as, 428bs‧‧ ‧ cutouts
50‧‧ hood
200‧‧‧ box
250‧‧‧Adjustment parts
300‧‧‧heating parts
1000‧‧‧UV irradiation device

[Fig. 1] Fig. 1 is an external perspective view of a UV irradiation unit according to a first embodiment of the present invention. Fig. 2 is a plan view showing a UV irradiation unit according to a first embodiment of the present invention. [Fig. 3] A cross-sectional view of the UV irradiation unit according to the first embodiment of the present invention taken along line A-A of Fig. 2 . [Fig. 4] is a plan view of a UV irradiation apparatus using the UV irradiation unit of the first embodiment of the present invention. Fig. 5 is a plan view showing a cylindrical lens housing portion of a UV irradiation unit according to the first embodiment of the present invention. Fig. 6 is a plan view showing a cylindrical lens pressing portion of the UV irradiation unit according to the first embodiment of the present invention. [Fig. 7] A partially enlarged view of a cross section taken along the line B-B of Fig. 2 of the UV irradiation unit according to the first embodiment of the present invention. Fig. 8 is a plan view showing a part of a cylindrical lens pressing portion according to a second embodiment of the present invention. Fig. 9 is a plan view showing a part of a cylindrical lens pressing portion according to a third embodiment of the present invention. Fig. 10 is a plan view showing a part of a cylindrical lens pressing portion according to a fourth embodiment of the present invention. Fig. 11 is a plan view showing a part of a cylindrical lens pressing portion according to a fifth embodiment of the present invention. Fig. 12 is a plan view showing a part of a cylindrical lens pressing portion according to a sixth embodiment of the present invention. Fig. 13 is a plan view showing a part of a cylindrical lens pressing portion according to a seventh embodiment of the present invention. Fig. 14 is a plan view showing a part of a cylindrical lens pressing portion according to an eighth embodiment of the present invention.

10‧‧‧Substrate

20‧‧‧LED components

30‧‧‧Spherical lens

30a‧‧‧ first side

30b‧‧‧ second side

31‧‧‧Spherical lens storage unit

32‧‧‧Spherical lens pressing unit

40‧‧‧ cylindrical lens

40a‧‧‧ first side

40b‧‧‧ second side

41‧‧‧Cylindrical lens storage unit

42‧‧‧Cylindrical lens press

410‧‧‧ recess

410a‧‧‧ bottom

415‧‧‧ openings

421a, 412b‧‧‧ tongue parts

50‧‧ hood

Claims (10)

A light irradiation unit that emits a linear light having a specific line width extending in a first direction and a second direction orthogonal to the first direction on an irradiation surface, the light irradiation unit The method includes: a substrate; N light sources, each of the light sources aligning an orientation of the optical axis in a third direction orthogonal to the first direction and the second direction, along the substrate One direction is arranged side by side at a specific interval, wherein N is an integer of 2 or more; N lenses each having a circular shape when viewed from the third direction, and each of the light sources is disposed on an optical path a lens accommodating portion including N concave portions, each of the concave portions accommodating each of the lenses and supporting a peripheral portion of a first surface side of each of the lenses; and a lens pressing portion having N sets of first and second tongue portions, each of the first and second tongue portions protruding on a second surface of each of the lenses in such a manner as to sandwich each of the lenses from the second direction And elastically pressing the edge portion of each of the second faces And pressing each of the lenses to the lens housing portion; wherein the lens housing portion rotatably supports each of the lenses on a plane defined by the first direction and the second direction; a second surface side of each of the lenses is formed with a convex surface having a positive refractive power at least in the second direction; and a front end of at least one of the first and second tongue portions has a lens corresponding to each of the lenses The shape of the surface shape of the first direction of the second side. The light irradiation unit according to claim 1, wherein the second surface of each of the lenses is a cylindrical surface, and a front end of at least one of the first and second tongue portions has a straight portion, and the cylindrical surface line Contact and parallel to the first direction. The light irradiation unit of claim 2, wherein the straight portion is formed to be divided into a plurality of along the first direction. The light irradiation unit of claim 2, wherein at least one other of the first and second tongue portions has a plurality of front end portions, the front end portions being independent and movable in the third direction, respectively The cylindrical surface point contact. The light irradiation unit according to claim 1, wherein the second surface of each of the lenses is a cylindrical surface, and at least one of the first and second tongue portions has a plurality of front end portions, and the front end portion is The third party is movable upwardly and in contact with the cylindrical surface point, and the virtual straight line connecting the plurality of front end portions is parallel to the first direction. The light irradiation unit according to claim 1, wherein the second surface of each of the lenses is a toric surface, and a front end of at least one of the first and second tongue portions has a cutout portion in which the toric surface is fitted. The light irradiation unit according to any one of claims 1 to 6, wherein the first surface of each of the lenses is any one of a concave surface, a convex surface, and a flat surface. The light irradiation unit according to any one of claims 1 to 6, wherein the light source is composed of at least one LED (Light Emitting Diode) element. The light irradiation unit according to any one of claims 1 to 6, wherein the light is light including a wavelength acting on the ultraviolet curable resin. A light irradiation device comprising the light irradiation unit according to any one of claims 1 to 6, wherein the plurality of light irradiation units are arranged in a rectangular frame shape on a specific reference plane.