JP5258715B2 - Irradiation device and light source unit - Google Patents

Irradiation device and light source unit Download PDF

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JP5258715B2
JP5258715B2 JP2009212239A JP2009212239A JP5258715B2 JP 5258715 B2 JP5258715 B2 JP 5258715B2 JP 2009212239 A JP2009212239 A JP 2009212239A JP 2009212239 A JP2009212239 A JP 2009212239A JP 5258715 B2 JP5258715 B2 JP 5258715B2
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light source
source unit
irradiation
fiber bundle
light
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JP2011056481A (en
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武 瀬木
恵司 金田
友紀 横田
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株式会社フジクラ
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Description

  The present invention relates to an irradiation apparatus and a light source unit.

  As a method for curing an adhesive or a coating agent, an ultraviolet curing method is known. In the ultraviolet curing method, ultraviolet curing material is irradiated with ultraviolet rays to cause a photopolymerization reaction, thereby changing a monomer (liquid) into a polymer (solid). In this ultraviolet curing method, an irradiation device for irradiating ultraviolet rays is required.

  As an ultraviolet irradiation device, a lamp type irradiation device using an ultraviolet lamp as a light source is known. However, in the lamp type irradiation apparatus, the amount of power consumption is large because the irradiation amount is controlled by opening and closing the shutter while the ultraviolet lamp is always turned on.

  On the other hand, with the development of a light emitting diode (LED) capable of generating ultraviolet rays, an ultraviolet irradiation device using ultraviolet LEDs instead of ultraviolet lamps has been put into practical use (Patent Document 1). In the case of an ultraviolet irradiation device using an ultraviolet LED as a light source, the power consumption of the ultraviolet LED is lower than that of an ultraviolet lamp, and it is only necessary to turn on the light source when irradiating ultraviolet rays. The

  Patent Document 1 describes an irradiation device (direct irradiation device) in which an ultraviolet LED is incorporated in an irradiation head that emits ultraviolet rays. However, in such a direct type irradiation apparatus, since the ultraviolet LED which is also a heat source is incorporated in the irradiation head, the irradiation head becomes hot. Since the irradiation head is a member that is touched by the operator, and when a mechanism for heat dissipation is added, it is not desirable that the irradiation head is heated because of restrictions on the installation location.

  Therefore, it is considered that the light source is provided on the main body side of the irradiation apparatus, instead of incorporating the light source into the irradiation head. In Patent Documents 2 and 3, an irradiation device (in which ultraviolet rays emitted from ultraviolet LEDs are incident on an optical fiber bundle, ultraviolet rays propagate in the optical fiber bundle, and ultraviolet rays are emitted from an irradiation head on the emission side of the optical fiber bundle ( Fiber bundle type irradiation device) is described. According to such a fiber bundle type irradiation apparatus, the irradiation head does not have to be heated.

JP 2006-281130 A International Publication No. 2008/114869 Pamphlet JP 2008-265304 A

There is a demand for changing the irradiation head and the optical fiber bundle in order to change the range and intensity irradiated with ultraviolet rays, the number of fiber bundles (number of irradiation heads), and the like.
In response to such a request, in the case of the direct type irradiation apparatus as in Patent Document 1, since the light source is incorporated in the irradiation head, the irradiation head can be made detachable from the main body of the irradiation apparatus.
On the other hand, in the case of the fiber bundle type irradiation device as in Patent Documents 2 and 3, if the positional relationship between the ultraviolet LED and the incident end of the optical fiber bundle shifts, the optical coupling efficiency between the ultraviolet LED and the optical fiber bundle decreases. End up. For this reason, in the fiber bundle type irradiation apparatus, it is not possible to replace only the irradiation head or the optical fiber bundle, and it is necessary to prepare another ultraviolet irradiation apparatus (an ultraviolet irradiation apparatus having a different irradiation head or optical fiber bundle). there were.

  This problem is not limited to the ultraviolet irradiation device, and the same problem occurs in the fiber bundle irradiation device that irradiates light other than ultraviolet light.

  An object of the present invention is to provide a configuration in which an irradiation head can be replaced in a fiber bundle type irradiation device (an irradiation device that propagates light emitted from an LED to an optical fiber bundle and irradiates the irradiation head). .

A main invention for achieving the above object is an irradiation apparatus for propagating light emitted from a light source to a fiber bundle and irradiating it from an irradiation head, comprising: a main body part; and a light source unit removable from the main body part. wherein the light source unit includes a light source composed of light emitting diodes, and said fiber bundle, said Ri der an irradiation head that integrally formed, the light source unit, together are dustproof by dustproof case A heat dissipating part for dissipating heat generated from the light source, and a connector for electrically connecting between the main body part, and a part of the heat dissipating part from the inside of the dustproof case It is an irradiation apparatus characterized by projecting outward and projecting outward from the connector .

  Other characteristics of the present invention will be made clear by the description and drawings described later.

  ADVANTAGE OF THE INVENTION According to this invention, in a fiber bundle type irradiation apparatus (irradiation apparatus which propagates the light radiated | emitted from LED to an optical fiber bundle, and irradiates from an irradiation head), it becomes possible to replace | exchange an irradiation head.

It is an external view of an irradiation apparatus. It is a schematic explanatory drawing of the basic composition of an irradiation apparatus. FIG. 3A is an explanatory diagram of an incident end of the upstream optical fiber bundle. FIG. 3B is an explanatory diagram of an optical coupling portion between the light source and the incident end of the upstream optical fiber bundle. It is explanatory drawing of the mode at the time of replacement | exchange of a light source unit. It is a schematic explanatory drawing of the basic composition of a light source unit. 6A and 6B are external views of the light source unit. 7A and 7B are external views of the lower case constituting the dustproof case. FIG. 7A is a perspective view of the rear side of the lower case as seen from an oblique direction, and FIG. 7B is a perspective view of the front side of the lower case as seen from an oblique direction. FIG. 8A is a cross-sectional view of the heat sink attached to the lower case. FIG. 8B is an explanatory diagram of a comparative example of a heat sink attachment method. FIG. 9A is a top view when the connector is attached to the lower case. FIG. 9B is a side view when the connector is attached to the lower case. It is the figure which looked at the state which attached the connector to the lower case from the rear side. FIG. 11A is an explanatory diagram of a method of fixing the upstream optical fiber bundle. FIG. 11B is an explanatory diagram of another fixing method of the upstream optical fiber bundle. 12A and 12B are external views of the upper surface cover constituting the dustproof case. FIG. 12A is a perspective view of the upper surface of the upper surface cover as viewed from an oblique direction, and FIG. 12B is a perspective view of the lower surface of the upper surface cover as viewed from an angle. FIG. 13A is a silhouette when viewed from the front side with the top cover attached to the lower case. FIG. 13B is an explanatory diagram of the rail 14 of the main body 10. FIG. 13C is an explanatory diagram when the rail 14 is viewed from the right side. 14A to 14C are explanatory diagrams of the type of irradiation head. FIG. 14D is an explanatory diagram in which a condenser lens is attached to the irradiation head of FIG. 14A. FIG. 15A is an explanatory diagram of a light source unit having five light sources. FIG. 15B is an explanatory diagram of a light source unit having ten light sources. FIG. 16A is an explanatory diagram of wiring of a light source unit having ten light sources. FIG. 16B is an explanatory diagram of wiring of a light source unit having five light sources. 17A and 17B are explanatory diagrams of another LED mounting board. FIG. 17A is an explanatory diagram of an LED mounting board used in a light source unit having ten light sources. FIG. 17B is an explanatory diagram of an LED mounting board used in a light source unit having five light sources. 18A and 18B are explanatory diagrams of another LED mounting substrate. FIG. 18A is an explanatory diagram of an LED mounting board used in a light source unit having ten light sources. FIG. 18B is an explanatory diagram of an LED mounting board used in a light source unit having five light sources.

  At least the following matters will be apparent from the description and drawings described below.

An irradiation apparatus for propagating light emitted from a light source to a fiber bundle and irradiating from an irradiation head, comprising: a main body portion; and a light source unit removable from the main body portion, wherein the light source unit includes a light emitting diode The irradiation apparatus is characterized in that the light source, the fiber bundle, and the irradiation head are integrally configured.
According to such an irradiation apparatus, it is possible to prevent the positional relationship between the light source and the fiber bundle from being changed when the irradiation head is replaced.

  The light source unit preferably has a heat radiating portion for radiating heat generated from the light source. Thereby, the heat of the light source can be effectively radiated. If the heat radiating part is provided on the main body part side, the heat radiating effect is lowered because the light source and the heat radiating part are separated.

  The main body preferably has a fan for sending air to the heat radiating portion. Thereby, a light source unit can be reduced in weight. If the fan is provided on the light source unit side, the light source unit becomes large and expensive.

  The light source unit is preferably dust-proof by a dust-proof case. Thereby, dust can be prevented between the light source and the incident end of the fiber bundle.

  Preferably, the light source unit has a heat radiating portion for radiating heat generated from the light source, and a part of the heat radiating portion protrudes from the inside to the outside of the dustproof case. Thereby, the heat of the light source can be effectively radiated. If the heat dissipating part is inside the dustproof case, heat is accumulated in the dustproof case, and the heat dissipation effect is reduced.

  It is desirable that contact surfaces of the heat radiating part and the dustproof case are on the same plane. Thereby, a dustproof case can be sealed, making a part of thermal radiation part project outside the dustproof case. If there are, for example, four contact surfaces between the heat dissipating part and the dustproof case, a gap is likely to occur between the heat dissipating part and the dustproof case.

  The light source unit preferably includes a connector for electrical connection with the main body, and a part of the heat radiating portion protrudes outward from the connector. Thereby, it is not necessary to hurt the terminal of the connector.

  The light source unit preferably includes a connector for electrical connection with the main body, and the connector is attached from the outside of the dustproof case. Thereby, since a thermal radiation part and a connector are mutually attached to a dust-proof case from the opposite side, an attachment space can be made small and size reduction of a light source unit can be achieved.

  The main body has a key switch for stopping the operation of the irradiation device, and the dust-proof case of the light source unit is formed with a recess that engages with a metal piece interlocking with the rotation of the key switch. When the key switch is turned on and the irradiation device is operable, it is desirable that the metal piece and the recess engage with each other so that the light source unit cannot be removed from the main body. Thereby, it is possible to prevent the light source unit from being removed when light is emitted from the light source.

  It is desirable that the concave portion is formed by being closed by a concave cap from the back side of the dustproof case. Thereby, a dust-proof case can be sealed more completely.

  It is preferable that the light source unit has a flange, and the main body has a rail for guiding the light source unit while supporting the light source unit by the flange. This facilitates the work of attaching the light source unit.

  In the collar part, it is desirable that a corner on the rail side be chamfered when the light source unit is mounted on the main body part. Thereby, it becomes easy to insert a light source unit in a main-body part.

  It is preferable that the flange portion is a portion where the upper surface cover protrudes from the lower case, and the space between the upper surface cover and the lower case is sealed with a double-sided tape. Thereby, a collar part becomes easy to slide on a rail.

  The light source unit preferably includes a memory for storing a usage time of the light source. Thereby, management of the use time of a light source becomes easy.

  The light source unit includes a first light source unit having M light sources and a second light source unit having N light sources, and the irradiation range of the irradiation head of the first light source unit is the second light source unit. When it is wider than the irradiation range of the irradiation head of the light source unit, it is desirable that M> N. Thereby, the irradiation range can be expanded without reducing the illuminance.

    The light source unit includes a first light source unit having M light sources and a second light source unit having N light sources, where M is an integer multiple of N and flows to the N light sources. A first transistor for controlling current and a second transistor for controlling current flowing in another N light sources, and when the second light source unit is attached to the main body, It is desirable that one of the first transistor and the second transistor be controlled so as to be always off. Thereby, inappropriate operation can be prevented while using the same substrate.

A light source unit that is removable from a main body of an irradiation apparatus that propagates light emitted from a light source to a fiber bundle and irradiates from an irradiation head, the light source including a light emitting diode, the fiber bundle, and the irradiation A light source unit characterized by integrally forming the head is clarified.
According to such an irradiation apparatus, it is possible to prevent the positional relationship between the light source and the fiber bundle from being changed when the irradiation head is replaced.

=== Basic Configuration of Irradiation Apparatus ===
FIG. 1 is an external view of an irradiation apparatus.
The irradiation device 1 is a fiber bundle type irradiation device that irradiates ultraviolet rays from the irradiation head 22. The irradiation head 22 is connected to the casing of the irradiation apparatus 1 via a metal flexible tube 23 that protects the optical fiber bundle. In the housing of the irradiation apparatus 1, there is an ultraviolet LED that is a light source.

  One end (incident end) of the optical fiber bundle in the metal flexible tube 23 faces the light source, and ultraviolet rays emitted from the light source enter from the incident end of the optical fiber bundle. The other end (outgoing end) of the optical fiber bundle is inserted into the irradiation head 22, and the ultraviolet light propagated through the optical fiber bundle is irradiated from the irradiation head 22.

  In the following description, “upper” and “lower” are expressed according to the vertical relationship when the irradiation apparatus 1 is placed in a normal use state as shown in the figure. Further, as shown in the figure, the side of the user who operates the operation panel 11A is expressed as “front”, and the opposite side is expressed as “rear”. Further, the right side as viewed from the user operating the operation panel 11A is expressed as “right”, and the left side as “left”.

  FIG. 2 is a schematic explanatory diagram of the basic configuration of the irradiation apparatus. As shown in the figure, the irradiation apparatus 1 includes a plurality of light sources 21, an optical fiber bundle 24, an irradiation head 22, a controller 11, a heat sink 51, and a cooling fan 12.

  The plurality of light sources 21 are each composed of an ultraviolet LED. Here, it is assumed that there are five light sources 21 (five ultraviolet LEDs). Each light source 21 is mounted on an LED mounting substrate 60, and the LED mounting substrate 60 is joined to a heat sink 51 in order to absorb and dissipate heat generated from the light source 21 during light emission. Since the light source 21 is dispersedly arranged at a plurality of places instead of at one place, the heat source can be dispersed.

  The optical fiber bundle 24 includes a plurality of upstream optical fiber bundles 24A located on the light source 21 side and downstream optical fiber bundles 24B located on the irradiation head 22 side. As shown in the figure, the plurality of upstream optical fiber bundles 24A are configured to be branched from the downstream optical fiber bundle 24B.

  Each upstream optical fiber bundle 24A is configured by densely concentrating hundreds of optical fibers having a diameter of about several hundred μm. Since there are five light sources 21, there are also five upstream optical fiber bundles 24A corresponding to the number of light sources 21. The incident side end (incident end) of each upstream optical fiber bundle 24A is optically coupled to the light source 21 by facing the corresponding light source 21, and the light emitted from the light source 21 is upstream of the upstream optical fiber bundle. The light enters the end of 24A.

The downstream optical fiber bundle 24B is configured by bundling a plurality of upstream optical fiber bundles 24A. For this reason, the downstream optical fiber bundle 24B is configured by closely concentrating a large number of optical fibers. When attention is paid to one of the plurality of upstream optical fiber bundles 24A, several hundred optical fibers constituting the upstream optical fiber bundle 24A are dispersedly arranged in the downstream fiber bundle. That is, hundreds of optical fibers constituting each upstream optical fiber bundle 24A are dispersedly arranged in the downstream optical fiber bundle 24B. As a result, there are variations in the light output of the plurality of light sources 21, there are variations in the optical coupling efficiency between the light sources 21 and the incident ends of the respective upstream optical fiber bundles 24A, and the individual optical fiber bundles 24A. Even if there is a variation in the light output of each of the optical fibers (each one of the optical fibers), the distribution of illuminance (W / cm 2 ) in the irradiation range can be made uniform.

  The irradiation head 22 is inserted with an end (exit end) on the exit side of the downstream optical fiber bundle 24B. And the irradiation head 22 irradiates the ultraviolet-ray radiate | emitted from the output end of the downstream optical fiber bundle 24B. In addition, a condensing lens may be provided in the irradiation head 22, and the ultraviolet rays emitted from the emission end of the downstream optical fiber bundle 24B may be condensed and irradiated.

  According to the irradiation apparatus 1 having the above-described configuration, since the ultraviolet rays emitted from the plurality of light sources 21 are combined by the optical fiber bundle 24, the light source 21 has a light output (W ) Can be increased.

<Light source and incident end of optical fiber bundle>
FIG. 3A is an explanatory diagram of an incident end of the upstream optical fiber bundle.
As already described, the upstream optical fiber bundle 24A is configured by bundling several hundred optical fibers 25. At the end portion of the upstream optical fiber bundle 24A, there is an integrated portion 26 formed by melting and integrating the tip portions of the bundled optical fibers 25. The integrated portion 26 has a partial conical shape whose outer shape becomes smaller as it proceeds toward the distal end side (light source side), and has an incident end 26A polished to a flat surface at the distal end.

  The optical fiber 25 that constitutes the upstream optical fiber bundle 24A includes a core that transmits incident light, a cladding that is provided so as to cover the periphery of the core, and a resin coating that is provided so as to cover the periphery of the cladding. It consists of parts. When the integrated portion 26 is formed, a large number of optical fibers 25 are prepared by removing the covering portion at the end portion. Next, a plurality of the optical fibers 25 that have been led out are bundled and filled into a glass pipe. Next, the glass pipe filled with the optical fiber 25 is heated with a burner to melt and integrate the optical fiber 25 and the glass pipe. Then, the melted and integrated part is cut, and the tip of the cut part is polished. As a result, the integrated portion 26 and the incident end 26A having the shape shown in the figure are formed.

FIG. 3B is an explanatory diagram of an optical coupling portion between the light source and the incident end of the upstream optical fiber bundle.
At least a part of the light emitted from the light source 21 is reflected by the tapered surface 26B of the integrated portion 26 after the propagation direction is bent by Snell's law at the incident end 26A of the integrated portion 26, and the optical fiber 25. Is incident on. Thereby, the incident angle to the optical fiber 25 can be made smaller than the incident angle to the incident end 26A. Here, the angle of incidence on the optical fiber 25 is approximately 0 degrees due to reflection at the tapered surface 26B. That is, the light is incident on the optical fiber 25 by substantially reducing the radiation angle of the light from the light source 21. As a result, the ratio of the light propagating through the optical fiber 25 to the light emitted from the light source 21 increases (the optical coupling efficiency increases).

  In the above description, the incident end 26A of the upstream optical fiber bundle 24A is a plane, but the incident end 26A may be curved so as to obtain a desired optical effect. Moreover, although the longitudinal cross section of the taper surface 26B of the integrated part 26 in a figure is a straight line, you may form a taper surface so that a longitudinal cross section may become a curve.

=== This Embodiment ===
<Overview>
There is a demand to change the shape of the irradiation head 22 in order to change the irradiation range of the ultraviolet rays. In the case of a fiber bundle type irradiation device, it is necessary to replace not only the irradiation head 22 but also the optical fiber bundle 24 in order to meet this requirement for structural reasons.
On the other hand, in the case of a fiber bundle type irradiation apparatus, as shown in FIG. 3B, the positional relationship between the light source 21 and the incident end 26A of the upstream optical fiber bundle 24A needs to be aligned with high accuracy. If this positional relationship is deviated, the proportion of the light emitted from the light source 21 that leaks outside and does not propagate to the optical fiber increases, and the optical coupling efficiency decreases.

  Therefore, in the irradiation apparatus 1 of the present embodiment, not only the irradiation head 22 and the fiber bundle but also the light source 21 is integrated into a light source unit, and this light source unit is configured to be detachable from the main body of the irradiation apparatus 1. Yes. Thereby, when the irradiation head 22 is replaced, the positional relationship between the light source 21 and the incident end 26A of the upstream optical fiber bundle 24A is prevented from changing.

<Main body>
FIG. 4 is an explanatory diagram of a state when the light source unit is replaced. As shown in the figure, in the irradiation apparatus 1 of the present embodiment, the light source unit 2 can be attached to and detached from the main body 10. For this reason, the main body portion 10 is formed with a housing portion for housing the light source unit 2.

  A controller 11 and a cooling fan 12 (not shown in FIG. 4) are mainly provided in the housing of the main body 10. The controller 11 includes an operation panel 11A for operation by an operator and a control board (not shown in FIG. 4). The operation panel 11A includes a display unit and various buttons as shown in the figure. The operator can set ultraviolet irradiation conditions (for example, irradiation on / off, irradiation time, irradiation intensity, etc.) by operating the operation panel 11A.

  A key switch 13 for safety measures is provided on the front surface of the main body 10. If the operator does not turn on the key switch 13, the control board of the controller 11 is configured so that ultraviolet rays are not irradiated from the light source.

<Light source unit>
FIG. 5 is a schematic explanatory diagram of the basic configuration of the light source unit. 6A and 6B are external views of the light source unit.

  The light source unit 2 includes a plurality of light sources 21, an optical fiber bundle 24, and an irradiation head 22. Thus, by integrating the light source 21, the optical fiber bundle 24, and the irradiation head 22 to configure the light source unit 2, the positional relationship between the light source 21 and the incident end of the upstream optical fiber bundle 24A changes when the light source unit is replaced. It is supposed not to.

  In addition, the light source unit 2 includes a dustproof case 30, an inner case 40, a heat sink 51, a connector 52, and a memory 71.

  The dustproof case 30 is a case for preventing dust and dust from entering the inside. The dustproof case 30 includes a lower case 31, an upper surface cover 32, a front cover 33, and the like. The aforementioned flexible tube 23 is attached to the front cover 33, and the downstream optical fiber bundle 24 </ b> B penetrates from the inside of the through hole formed in the front cover 33 toward the inside of the flexible tube 23.

  The inner case 40 is a metal case for protecting the light source 21 and the incident portion of the upstream optical fiber bundle 24A. The inner case 40 is provided inside the dustproof case 30. The inner case 40 has a plurality of through holes 41, and the upstream optical fiber bundle 24 </ b> A passes through the through holes 41. An ultraviolet LED serving as the light source 21 is mounted on the surface (front surface) of the LED mounting substrate 60, and the inner case 40 is configured to cover the surface side of the LED mounting substrate 60. The inner case 40 is screwed to the LED mounting board 60.

  The heat sink 51 absorbs and dissipates heat generated from the light source 21 during light emission. The heat sink 51 is bonded to the back surface (rear surface) of the LED mounting substrate 60, and the light source 21 and the heat sink 51 are thermally bonded. In addition, when the light source unit 2 is mounted on the main body 10, the heat sink of the heat sink 51 is exposed from the dustproof case 30 so that the heat sink of the heat sink 51 hits the wind from the cooling fan 12 of the main body 10. ing.

  The connector 52 is for electrically connecting the main body 10 and the light source unit 2.

  The memory 71 is a storage unit for storing the usage time of the light source 21. Since the memory 71 for storing the usage time of the light source 21 is provided on the light source unit 2 side, the controller of the main body 10 is used even in a situation where one light source unit 2 is reused between the plurality of main bodies 10. 11 can correctly recognize the usage time of the light source 21.

  A jumper pin 72 is provided on the memory board 70 on which the memory 71 is mounted. The jumper pins 72 are used to indicate the number of light sources 21 (five here) of the light source unit 2. A control method using the jumper pin setting will be described later.

  7A and 7B are external views of the lower case constituting the dustproof case. FIG. 7A is a perspective view of the rear side of the lower case as seen from an oblique direction, and FIG. 7B is a perspective view of the front side of the lower case as seen from an oblique direction. On the rear side of the lower case 31, a heat sink window 31 </ b> A for exposing the heat sink of the heat sink 51 and a connector window for drawing electric wiring from the connector 52 into the light source unit 2 are formed.

  FIG. 8A is a cross-sectional view of the heat sink attached to the lower case. Thus, the heat sink 51 is attached to the lower case 31 such that the heat radiating plate protrudes from the inner side to the outer side of the lower case 31. Thereby, since the contact surface with the lower case 31 can be made the same plane, a gap is generated between the lower case 31 and the heat sink 51 even if the dimensional accuracy of the heat sink window 31A of the lower case 31 is somewhat low. It becomes difficult.

  FIG. 8B is an explanatory diagram of a comparative example of a heat sink attachment method. In the comparative example, the heat sink 51 is attached to the lower case 31 from the side surface of the heat sink 51. In the case of this comparative example, there are four contact surfaces between the heat sink 51 and the lower case 31. As a result, when the dimensional accuracy of the heat sink window 31A is low, a gap is likely to be generated between the heat sink window 31A and the heat sink 51. For this reason, in the present embodiment, the structure of FIG. 8A is adopted, and the dustproof case 30 is sealed while exposing the heat sink of the heat sink 51 to the outside.

  FIG. 9A is a top view when the connector is attached to the lower case. FIG. 9B is a side view when the connector is attached to the lower case. Thus, when the connector 52 is attached to the lower case 31, the heat sink of the heat sink 51 protrudes to the rear side of the connector 52. As a result, even if the rear side of the light source unit 2 contacts the front surface of the main body 10 when the light source unit 2 is mounted, the heat sink of the heat sink 51 contacts first rather than the connector 52, so that the terminals of the connector 52 are not damaged. That's it.

FIG. 10 is a view of the state in which the connector is attached to the lower case as viewed from the rear side. As shown in the figure, the connector 52 is attached from the outside of the lower case 31. That is, it is attached from the opposite side to the heat sink 51. The reason for this is as follows.
In the present embodiment, the heat sink 51 includes a protruding area that protrudes in the left-right direction from the heat sink window 31 </ b> A, and the protruding area is in contact with the inside of the lower case 31 without a gap. Furthermore, when screwing the heat sink 51, it is necessary to form a screw hole in the protruding region of the heat sink 51. For this reason, the protruding region of the heat sink 51 protrudes further in the left-right direction at least inside the lower case 31 from the position of the screw hole. On the other hand, in order to attach the connector 52 to the connector window 31B as well, a region protruding in the left-right direction from the connector window 31B is required. Here, if the connector 52 is attached from the inside of the lower case 31 similarly to the heat sink 51, it is necessary to separate the heat sink window 31A and the connector window 31B in order to prevent the heat sink 51 and the connector 52 from colliding with each other. Yes, the lateral width of the light source unit 2 becomes large. Thus, in the present embodiment, the lateral width of the light source unit 2 is reduced by attaching the heat sink 51 and the connector 52 from opposite sides.

  FIG. 11A is an explanatory diagram of a method of fixing the upstream optical fiber bundle. The inner case 40 has a plurality of through holes 41 through which an upstream optical fiber bundle 24A to which a metal pipe 43 is attached passes. The metal pipe 43 is fixed to the upstream optical fiber bundle 24A with an adhesive. A flange tube 42 is provided on the front side of the through hole 41. The flange tube 42 is for fixing the upstream optical fiber bundle 24 </ b> A via the metal pipe 43. The flange pipe 42 and the metal pipe 43 are fixed by a hexagon socket set screw. The flange tube 42 and the inner case 40 are screwed together. By fixing the flange tube 42 to the inner case 40, the upstream optical fiber bundle 24 </ b> A is fixed via the metal pipe 43. Further, the upstream side optical fiber bundle 24 </ b> A is fixed vertically to the inner case 40 by the flange tube 42, and is also fixed vertically to the LED mounting substrate 60. Thus, the positional relationship between the light source 21 and the incident end of the upstream optical fiber bundle 24A is fixed by fixing the upstream optical fiber bundle 24A to the inner case 40.

  FIG. 11B is an explanatory diagram of another fixing method of the upstream optical fiber bundle. In this fixing method, the metal pipe 43 is not used. Here, the upstream optical fiber bundle 24A is fixed to the flange tube 42 with an adhesive. Even in such a fixing method, the upstream side optical fiber bundle 24 </ b> A can be fixed by fixing the flange tube 42 to the inner case 40. Even with such a fixing method, the upstream optical fiber bundle 24 </ b> A can be fixed vertically to the inner case 40 by the flange tube 42, and can also be fixed vertically to the LED mounting substrate 60. Even with such a fixing method, the positional relationship between the light source 21 and the incident end of the upstream optical fiber bundle 24A can be fixed. Moreover, since the number of parts can be reduced as compared with FIG. 11A, the fixing work of the upstream optical fiber bundle 24A can be simplified.

  11A and 11B, the flange pipe 42 is provided only on the front side of the through hole 41. However, the flange tube 42 may be provided not only on the front side of the through hole 41 but also on the rear side.

  12A and 12B are external views of the upper surface cover constituting the dustproof case. FIG. 12A is a perspective view of the upper surface of the upper surface cover as viewed from an oblique direction, and FIG. 12B is a perspective view of the lower surface of the upper surface cover as viewed from an angle. The upper surface cover 32 is attached to the upper side of the lower case 31. At the four corners of the upper surface cover 32, holes used for screwing to the lower case 31 are formed.

On the left side of the front side of the top cover 32, a recess 32A is formed. When the key is turned so that the key switch 13 (see FIG. 4) is turned on, the metal piece in the main body 10 rotates with the rotation of the key, and the metal piece engages with the recess 32A. Thereby, when the key switch 13 is ON (when the irradiation apparatus 1 is operable), the light source unit 2 is prevented from being removed from the main body 10. As long as it only engages with the metal piece of the key switch 13, the recess 32A of the top cover 32 may be a simple rectangular hole. However, in this embodiment, in order to prevent dust from entering the inside of the dustproof case 30, the concave portion 32A is formed by welding and closing a concave cap from the lower side.
Two corners on the rear side of the upper surface cover 32 are chamfered (that is, two corners on the rear side of the flange portion 32B (described later) are chamfered). This is to facilitate insertion of the light source unit 2 into the main body 10.

  FIG. 13A is a silhouette when viewed from the front side with the top cover attached to the lower case. FIG. 13B is an explanatory diagram of the rail 14 of the main body 10. FIG. 13C is an explanatory diagram when the rail 14 is viewed from the right side. As can be seen from FIGS. 13A and 6B, when the upper cover 32 is attached to the lower case 31, the left and right sides of the upper cover 32 protrude from the lower case 31 to form a flange 32 </ b> B. On the other hand, as can be seen from FIG. 13B, a rail 14 is formed on the upper side of the housing portion of the light source unit 2 of the main body 10. When the light source unit 2 is attached to the main body 10, the light source unit 2 is attached to the rail 14 while inserting the flange 32 </ b> B of the light source unit 2 into the rail 14 of the main body 10 and supporting the light source unit 2 on the rail 14 with the flange 32 </ b> B. Insert while sliding. In this embodiment, since the light source unit 2 is inserted while guiding the narrow flange portion 32B to the rail 14, the contact area between the light source unit 2 and the main body portion 10 can be reduced, so that the light source unit 2 is attached. Becomes smooth. Moreover, as shown to FIG. 13C, as for the rail 14 of the main-body part 10, the space | interval of the upper and lower sides has spread toward the front side. This makes it easier for the operator to insert the collar portion 32 </ b> B of the light source unit 2 into the rail 14 of the main body portion 10. As shown in FIG. 13A, the light source unit 2 is vertically asymmetric, and as shown in FIG. 13B, the light source unit 2 housing part of the main body 10 is vertically asymmetric. On the contrary, it is prevented from being mounted.

  The upper surface cover 32 is screwed to the lower case 31, but in order to completely seal the gap between the upper surface cover 32 and the lower case 31, in the present embodiment, between the upper surface cover 32 and the lower case 31. It has double-sided tape. If an adhesive is used instead of the double-sided tape, an excess of the adhesive leaks to the lower side of the flange 32B, and the flange 32B is difficult to slide on the rail 14.

<Light source unit type 1>
14A to 14C are explanatory diagrams of the type of irradiation head. FIG. 14A is an explanatory diagram of an irradiation head of a circular light source unit. FIG. 14B is an explanatory diagram of an irradiation head of a slit type light source unit. FIG. 14C is an explanatory diagram of an irradiation head of a rectangular light source unit.

The exit end of the downstream optical fiber bundle 24B inserted into the irradiation head 22 is configured by closely concentrating a number of optical fibers. For this reason, the irradiation head 22 from which an irradiation range differs can be comprised by changing how to bundle the optical fiber in the output end side of the downstream optical fiber bundle 24B.
And according to the irradiation apparatus 1 of this embodiment, if the light source unit 2 is replaced | exchanged, the shape of an irradiation range can be changed.

  14D is an explanatory diagram in which a condenser lens is attached to the irradiation head of FIG. 14A. Thus, it is also possible to change the irradiation range by the optical lens without replacing the light source unit 2.

<Type 2 of light source unit>
There is a request to expand the irradiation range. However, if the irradiation range is expanded by increasing the distance between the irradiation head and the object to be irradiated, or by attaching an optical lens to the irradiation head 22, the illuminance (the amount of light per unit area) decreases. For example, if the irradiation range is doubled, the illuminance is halved.

  Therefore, you may prepare the light source unit 2 of the type from which the number of the light sources 21 differs. In the present embodiment, two types of light source units 2 having five light sources 21 and ten types of light sources 21 having ten light sources 21 are prepared.

  FIG. 15A is an explanatory diagram of a light source unit having five light sources. FIG. 15B is an explanatory diagram of a light source unit having ten light sources. According to the light source unit 2 in FIG. 15B, the illuminance can be made equal even if the irradiation range is double that of the light source unit 2 in FIG. 15A. That is, when the light source unit 2 having a wide irradiation range is configured, if the number of light sources of the light source unit 2 is increased, it is not necessary to reduce the illuminance.

  In the case of a direct irradiation device (an irradiation device in which a light source is incorporated in an irradiation head), there is a drawback that it is difficult to increase the number of light sources because the irradiation head becomes hot when the number of light sources is doubled. On the other hand, according to the fiber bundle type irradiation apparatus as in the present embodiment, there is no problem that the irradiation head 22 becomes hot even if the number of the light sources 21 is doubled. In addition, in the case of the fiber bundle type irradiation apparatus, the light sources 21 can be dispersedly arranged, so that there is an advantage that the light sources 21 can be easily cooled and the number of light sources 21 can be easily increased. For this reason, in the fiber bundle type irradiation apparatus, it can be said that preparing the light source units 2 of different types of the light sources 21 is a configuration that effectively utilizes the advantages of the fiber bundle type irradiation apparatus.

  FIG. 16A is an explanatory diagram of wiring of a light source unit having ten light sources. The LED mounting board 60 in the figure is provided on the light source unit 2 side, and the controller 11 is provided on the main body 10 side. On the LED mounting substrate 60, ten ultraviolet LEDs that are the light sources 21 are mounted. Five light sources 21 are arranged in series to constitute a light source group 21A, and two light source groups 21A are arranged in parallel. One end of each light source group 21 </ b> A is connected to the power supply potential, and the other end is grounded via the transistor 61 and the resistor 62 of the controller 11. Each transistor 61 is ON / OFF controlled by a control signal output from each comparator 63. The comparator 63 compares the potential at the point between the transistor 61 and the resistor 62 (the voltage across the resistor 62) with the potential of the target signal from the controller 11. With this configuration, the transistor 61 is ON / OFF controlled so that the potential between the transistor 61 and the resistor 62 becomes a predetermined potential. As a result, a current corresponding to the target signal output from the controller 11 flows to each light source 21. .

  Thus, in this embodiment, the LED mounting substrate 60 is configured so that a plurality (here, two) of light source groups 21A can be arranged in parallel. Thereby, as will be described next, the same LED mounting substrate 60 can be mounted on the light source unit 2 to form the light source units 2 having different numbers of light sources.

  FIG. 16B is an explanatory diagram of wiring of a light source unit having five light sources. In the present embodiment, the LED mounting substrate 60 in which the light source 21 is used for ten light source units 2 is also used for the five light source units 2. In order to divert the LED mounting board 60 in this way, the five light sources 21 are mounted on the LED mounting board 60 so as to have the same arrangement as the five light sources 21 of one light source group 21A in FIG. 16A. .

  In FIG. 16B, when the same target signal is input to the two comparators 63, even the transistor 61 where the light source 21 is not provided is turned ON / OFF. On the other hand, since the light source 21 is not provided, the potential of the power supply side terminal of the transistor 61 is indefinite. If the transistor 61 is turned on / off in such a state, the control of the current flowing through the light source 21 may be adversely affected. For this reason, it is desirable that the transistor 61 in which the light source 21 is not provided is always OFF. Therefore, in the present embodiment, when the light source unit 5 having five light sources 21 is mounted on the main body unit 10, the controller 11 sets one target signal to 0 V and the transistor 61 in which the light source 21 is not provided. Is always off.

  In the present embodiment, when the light source unit 2 is mounted on the main body 10, the controller 11 reads the setting of the jumper pin 72 of the memory board 70 (see FIG. 5) of the light source unit 2 and the light source of the light source unit 2. It recognizes the number 21. In the case of the light source unit 2 having five light sources 21, the controller 11 sets the target signal on which the light source 21 is not provided to 0V.

  In the present embodiment, the jumper pins 72 are used for recognizing the number of light sources 21, but the present invention is not limited to this. For example, information indicating the number of light sources 21 may be stored in the memory 71. However, the memory 71 uses a writable memory 71 for sequentially storing information on usage time. On the other hand, the number of light sources 21 of the light source unit 2 does not change after the light source unit 2 is manufactured. In this embodiment, the number of the light sources 21 is set by the jumper pins 72 instead of the memory 71 that may cause erroneous input of information.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be modified and improved without departing from the gist thereof, and it goes without saying that the present invention includes equivalents thereof. In particular, the embodiments described below are also included in the present invention.

<About the light source 21>
In the above-described embodiment, the number of light sources of the light source unit 2 is five or ten. However, the number of light sources is not limited to this. For example, the number of light sources of the light source unit 2 may be two or may be other numbers.

<About heat sink 51>
In the above-described embodiment, the heat sink 51 is used as the heat radiating portion. However, the heat radiating portion is not limited to the heat sink 51. For example, a Peltier element, a heat pump, or the like may be used alone or in combination.

<About the connector 52>
In the above-described embodiment, the connector 52 is provided so as not to protrude from the heat sink of the heat sink 51. However, the present invention is not limited to this. If it is not necessary to consider the damage of the connector 52, the connector 52 may protrude to the same extent as the heat sink of the heat sink 51, or the connector 52 may protrude from the heat sink of the heat sink 51.

<About the collar part 32B and the rail 14>
In the above-described embodiment, the flange portion 32 </ b> B is configured by the upper surface cover 32 protruding left and right with respect to the lower case 31. However, the collar part 32B is not restricted to this. For example, a portion that protrudes to the left and right may be formed in the lower case 31, and this may function as a collar.
Further, if the workability of attaching the light source unit is not taken into consideration, the collar portion 32B and the rail 14 need not be provided.

<Regarding LED mounting board 60 (1)>
17A and 17B are explanatory diagrams of another LED mounting board. FIG. 17A is an explanatory diagram of an LED mounting board used in a light source unit having ten light sources. FIG. 17B is an explanatory diagram of an LED mounting board used in a light source unit having five light sources.

  In the above-described embodiment, the plurality of light source groups 21A are arranged in parallel on the LED mounting board 60 (see FIGS. 16A and 16B), but here, one light source group 21A is arranged on the LED mounting board 60. There is only. However, even if such an LED mounting substrate 60 is used, the number of light sources of the light source unit 2 can be changed by changing the number of LED mounting substrates 60 mounted on the light source unit 2.

  When mounting a plurality of LED mounting boards 60 on the light source unit 2 as shown in FIG. 17A, the same LED mounting boards 60 may be mounted, or different LED mounting boards 60 may be mounted.

<Regarding LED mounting board 60 (2)>
18A and 18B are explanatory diagrams of another LED mounting substrate. FIG. 18A is an explanatory diagram of an LED mounting board used in a light source unit having ten light sources. FIG. 18B is an explanatory diagram of an LED mounting board used in a light source unit having five light sources.

  In the above-described embodiment, the transistor 61 is provided on the controller 11 side (see FIGS. 16A, 16B, 17A, and 17B). Here, the transistor 61 is provided on the LED mounting substrate 60. As described above, an electric circuit such as the transistor 61, the resistor 62, and the comparator 63 may be provided on the LED mounting substrate 60.

  However, considering that the transistor 61 also generates heat and that it is necessary to prevent the transistor 61 from being destroyed by the heat of the ultraviolet LED that is the light source 21, the LED mounting substrate 60 is not formed on the LED mounting substrate 60 as in the above-described embodiment. It is preferable not to provide the transistor 61. Moreover, the LED mounting board 60 can be made smaller and the light source unit 2 can be miniaturized more easily if the transistor 61 or the like is not provided on the LED mounting board 60 as in the above-described embodiment.

<Regarding LED mounting board 60 (3)>
In the embodiment of FIGS. 16A and 16B, the same LED mounting substrate 60 is used for the light source unit 2 having five light sources 21 and the light source unit 2 having ten light sources 21. However, if the LED mounting board 60 is not diverted, the LED mounting boards 60 having different configurations may be used.

  In the above-described embodiment, the LED mounting substrate 60 is configured so that the number of the light source groups 21A is two (see FIG. 16A). However, the present invention is not limited to this, and the LED mounting substrate 60 may be configured so that the number of light source groups 21A is two or more. Thereby, it is not restricted to 2 times, The light source unit 2 from which the number of light sources differs by integer times can be comprised with the same LED mounting board 60. FIG.

<About jumper pin 72>
In the above-described embodiment, the jumper pin 72 is used as a means for recognizing the number of the light sources 21. However, it goes without saying that the number of light sources may be recognized by a method other than the jumper pin 72.

1 irradiation device,
10 main body, 11 controller, 11A operation panel,
12 cooling fans, 13 key switches, 14 rails,
2 light source unit, 21 light source, 21A light source group,
22 irradiation head, 23 flexible tube, 24 optical fiber bundle,
24A upstream optical fiber bundle, 24B downstream optical fiber bundle,
25 optical fiber, 26 integrated part, 26A incident end, 26B taper surface 30 dustproof case, 31 lower case,
31A heat sink window, 31B connector window,
32 upper surface cover, 32A recess, 32B collar, 33 front cover,
40 inner case, 41 through hole, 42 flange tube,
51 heat sink, 52 connector,
60 LED mounting board, 61 transistor, 62 resistance, 63 comparator,
70 memory board, 71 memory, 72 jumper pins

Claims (13)

  1. An irradiation device that propagates light emitted from a light source to a fiber bundle and irradiates from an irradiation head,
    The main body,
    A light source unit removable from the main body,
    The light source unit is
    The light source comprising a light emitting diode;
    The fiber bundle;
    All SANYO was integrally formed with said emitting head,
    The light source unit is dust-proof by a dust-proof case, and has a heat radiating part for radiating heat generated from the light source, and a connector for electrical connection between the main body part,
    An irradiation apparatus , wherein a part of the heat radiating part protrudes from the inside to the outside of the dustproof case and protrudes to the outside of the connector .
  2. The irradiation device according to claim 1,
    The said main-body part has a fan for sending a wind to the said thermal radiation part, The irradiation apparatus characterized by the above-mentioned.
  3. The irradiation apparatus according to claim 1 or 2 ,
    The irradiation device, wherein a contact surface between the heat radiation part and the dustproof case is on the same plane.
  4. The irradiation apparatus according to any one of claims 1 to 3 ,
    Before Symbol connector irradiation apparatus characterized by being mounted from the outside of the dust-proof case.
  5. It is an irradiation apparatus in any one of Claims 1-4 , Comprising :
    The main body has a key switch for stopping the operation of the irradiation device,
    The dustproof case of the light source unit is formed with a recess that engages with a metal piece that interlocks with the rotation of the key switch.
    When the key switch is turned on and the irradiation device is operable, the metal piece and the recess engage with each other, and the light source unit cannot be removed from the main body.
  6. The irradiation device according to claim 5 ,
    The irradiation device, wherein the concave portion is formed by being closed by a concave cap from the back side of the dustproof case.
  7. It is an irradiation apparatus in any one of Claims 1-6 ,
    The light source unit has a flange,
    The said main-body part has a rail for guiding the said light source unit, supporting the said light source unit with the said collar part, The irradiation apparatus characterized by the above-mentioned.
  8. The irradiation device according to claim 7 ,
    In the collar portion, the corner that becomes the rail side when the light source unit is attached to the main body is chamfered.
  9. The irradiation device according to claim 7 or 8 ,
    The collar portion is a portion where the upper surface cover protrudes from the lower case,
    The irradiation device, wherein the upper surface cover and the lower case are sealed with a double-sided tape.
  10. An irradiation apparatus according to claim 1 ,
    The light source unit includes a memory for storing a usage time of the light source.
  11. It is an irradiation apparatus in any one of Claims 1-10 ,
    The light source unit includes a first light source unit having M light sources and a second light source unit having N light sources,
    When the irradiation range of the irradiation head of the first light source unit is wider than the irradiation range of the irradiation head of the second light source unit,
    An irradiation apparatus, wherein M> N.
  12. It is an irradiation apparatus of Claims 1-10 , Comprising :
    The light source unit includes a first light source unit having M light sources and a second light source unit having N light sources,
    M is an integer multiple of N;
    A first transistor for controlling the current flowing in the N light sources and a second transistor for controlling the current flowing in another N light sources;
    The irradiation apparatus, wherein when the second light source unit is attached to the main body, one of the first transistor and the second transistor is controlled to be always off.
  13. A light source unit that is removable from the main body of the irradiation device that propagates the light emitted from the light source to the fiber bundle and irradiates from the irradiation head,
    The light source comprising a light emitting diode;
    The fiber bundle;
    The irradiation head is integrally configured ,
    The light source unit is dust-proof by a dust-proof case, and has a heat radiating part for radiating heat generated from the light source, and a connector for electrical connection between the main body part,
    A part of the heat radiating portion protrudes from the inside to the outside of the dust-proof case and protrudes to the outside of the connector .
JP2009212239A 2009-09-14 2009-09-14 Irradiation device and light source unit Expired - Fee Related JP5258715B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11219608A (en) * 1998-01-30 1999-08-10 Tb Optical Kk Illuminating light source for light guide and lighting system
US6157027A (en) * 1998-12-01 2000-12-05 Nec Usa, Inc. Modular optical fiber color image scanner with all-optical scanner head having side-coupled light guide for providing illumination light to the scanner head
JP2001307523A (en) * 2000-04-19 2001-11-02 Mitsubishi Rayon Co Ltd Illuminating apparatus
JP2002028497A (en) * 2000-07-14 2002-01-29 Hoya-Schott Corp Light transmitter, light irradiation device and photopolymeirization method
JP2002159445A (en) * 2000-11-27 2002-06-04 Asahi Optical Co Ltd Electronic endoscope and scope of electronic endoscope
JP2002228942A (en) * 2001-01-31 2002-08-14 Asahi Optical Co Ltd Light source apparatus and endoscopic system
JP2007515270A (en) * 2003-12-02 2007-06-14 スリーエム イノベイティブ プロパティズ カンパニー Irradiation device
JP4657253B2 (en) * 2007-06-05 2011-03-23 シーシーエス株式会社 LED light source device

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