JP4968184B2 - Ultraviolet irradiation head and ultraviolet irradiation device - Google Patents

Description

  The present invention relates to an ultraviolet irradiation head and an ultraviolet irradiation apparatus for irradiating ultraviolet rays for uses such as curing an ultraviolet curable resin used for adhesion of electronic components and the like.

  Conventionally, an ultraviolet irradiation device has been used for the purpose of curing an ultraviolet curable resin in an assembly operation of an electronic component. UV irradiators that cure UV curable resins are used for UV curable resins that are widely used from the field of resist film formation and printing to the field of bonding and fixing small parts in assembly processes such as optical pickups. Used for the purpose of irradiating ultraviolet rays. This type of ultraviolet irradiation device includes a controller that is a main body of a device incorporating a power supply circuit and the like, a head that radiates ultraviolet rays, and a cable that connects them. The controller incorporates a high-pressure mercury lamp, mercury xenon lamp, metal halide lamp, etc. that are UV sources, and transmits UV light to the head with an optical fiber such as quartz glass built into the cable connecting the controller and the head. Is applied to the applied adhesive portion.

  In such a lamp-type ultraviolet irradiation device using a high-pressure mercury lamp or the like, since a high-pressure mercury lamp or a mercury xenon lamp is used as an ultraviolet ray source, the amount of heat generation and power consumption is large, and a cooling mechanism is necessary and the device is required. In addition to the increase in size and cost, there are drawbacks such as a large energy consumption due to the constantly lit structure, a long time for rising and falling, and a shortened lamp life. In addition, since the adjustment of the ultraviolet output is performed by a mechanical shutter, fine adjustment is difficult. Furthermore, when the lamp deteriorates, the glass may crack, and there is a danger that the glass tube will burst by the high-pressure gas enclosed in the glass tube. For this reason, it is necessary to replace the lamp after a certain period of time, and in addition to the increase in running cost, it is necessary to regularly check the replacement every day and the like.

For this reason, in order to solve such problems, an ultraviolet irradiation device has been developed in which a semiconductor element such as an ultraviolet light emitting diode is used as an ultraviolet ray source, and the ultraviolet ray source is provided on the head side instead of the main body controller. Yes. These ultraviolet irradiation devices use ultraviolet light emitting diodes, which are semiconductor elements, so that they can be finely adjusted for output, operate at high speed, have a long life, have high reliability, and can be used with low power consumption. Features.
JP 2006-116922 A

  By the way, in the above prior art, an ultraviolet irradiation device that uses a semiconductor element such as an ultraviolet light emitting diode as an ultraviolet light source has a configuration in which the ultraviolet light emitting diode is provided on the head side. It is necessary to provide a heat dissipation mechanism for dissipating heat. However, if the head structure member is downsized due to the demand for downsizing of the head portion, there is a problem that the heat dissipation performance deteriorates due to a reduction in the heat dissipation area and the heat dissipation performance of the ultraviolet light emitting diode decreases. When the heat radiation property of the ultraviolet light emitting diode becomes insufficient, there is a problem that the performance of the ultraviolet light emitting diode is lowered by heat, leading to a decrease in output or shortening the life of the element.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an ultraviolet irradiation head and an ultraviolet irradiation apparatus that can improve heat dissipation and improve the performance of a semiconductor element serving as an ultraviolet ray source.

1st invention of this application is an ultraviolet irradiation head provided with the semiconductor element which irradiates the ultraviolet-ray for hardening an ultraviolet curable resin, Comprising: The said ultraviolet irradiation head disperse | distributes the heat | fever generated by irradiation to the said semiconductor element inside And holding the hollow casing portion, and the semiconductor element and the first propeller are disposed in the hollow interior of the casing portion from one axial end to the other axial end. Part, a second propeller part, a shaft, and a drive motor are provided, and the housing part communicates the hollow interior and exterior of the housing part between the semiconductor element and the first propeller part. An inflow hole and an air outflow hole communicating between the hollow interior and the exterior of the housing section are provided between the second propeller section and the drive motor, respectively, and the rotation of the drive motor is performed by the shaft. Through the first Is configured to rotate Pella unit and the second propeller unit, by the rotation of the drive motor, advances along the axial direction and flows from the outside air the air inflow hole into the hollow of the casing The air flow is configured to flow out to the outside through the air outflow hole.

According to the first aspect of the present invention, an air flow is generated by the air flow generation unit in the hollow interior of the housing unit. Thereby, although heat | fever generate | occur | produces inside a housing | casing part because a housing | casing part hold | maintains a semiconductor element, heat can be disperse | distributed inside a housing | casing part. Since an air flow is generated in the hollow inside of the inner housing portion 38, heat generated from the semiconductor element is released to the outside of the housing portion together with the air flow.
Thereby, the heat dissipation of an ultraviolet irradiation head can be improved and the reliability and stability of a semiconductor element can be improved.

  The second invention of the present application is an ultraviolet irradiation device for irradiating ultraviolet rays for curing the ultraviolet curable resin, and is characterized by comprising the ultraviolet irradiation head according to the first invention of the present application.

  According to the second aspect of the present invention, the heat radiation property of the ultraviolet irradiation head provided can be improved, and as a result, the performance of the ultraviolet irradiation apparatus can be improved.

  ADVANTAGE OF THE INVENTION According to this invention, the heat dissipation can be improved, the semiconductor element used as an ultraviolet-ray source can be protected from a heat | fever, and the performance of a semiconductor element can be improved by extension.

  Next, an ultraviolet irradiation head and an ultraviolet irradiation apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the ultraviolet irradiation apparatus 10 is comprised by the controller part 12, the ultraviolet irradiation head 14, and the cable part 16 which electrically connects both. The controller unit 12 is a power source unit (not shown) for driving the ultraviolet ray source of the ultraviolet irradiation head 14, a control unit for controlling light emission of the UVLED 20 described later and driving of the drive motor 26 described later, and a display for displaying setting contents. And a setting unit for setting the ultraviolet irradiation condition and the like, and the drive signal (electric signal) of the ultraviolet light source (UVLED 20) and the drive motor 26 is transmitted to the ultraviolet irradiation head 14 via the cable unit 16.

  As shown in FIGS. 2 and 3, the ultraviolet irradiation head 14 includes a cylindrical outer casing portion 18. An inner casing 38 is provided inside the outer casing 18. Thus, the ultraviolet irradiation head 14 has a double structure composed of two types of casings. In the vicinity of one end portion in the axial direction of the inner housing portion 38, the UVLED 20 that is a semiconductor element is positioned and fixed as an ultraviolet ray source that emits ultraviolet rays for curing the ultraviolet curable resin. Further, as shown in FIG. 4, a lens 22 for condensing and polarizing ultraviolet rays from the UVLED 20 is provided in the vicinity of one end portion in the axial direction of the inner housing portion 38.

  As shown in FIG. 1, the cable portion 16 described above is connected to the inside of the outer housing portion 18 of the ultraviolet irradiation head 14 in the vicinity of the other end portion in the axial direction. As shown in FIGS. 2, 3, and 6, the shaft 24 is provided in at least a part of the inner housing portion 38 between the UVLED 20 and the connection end of the cable portion 16. ing. The shaft 24 is rotatably supported by a bearing 36 inside the inner housing portion 38. A drive motor 26 that rotates the shaft 24 is provided inside the inner housing portion 38. In addition, the axial direction one side edge part of the shaft 24 is located in the vicinity of UVLED20. Further, the other end portion in the axial direction of the shaft 24 is connected to the rotation shaft of the drive motor 26.

  A first propeller portion 28 for generating an air flow is provided in the vicinity of one end portion in the axial direction of the shaft 24. The first propeller portion 28 rotates with the rotation of the shaft 24. As shown in FIG. 5, the first propeller portion 28 is configured by attaching three blade portions 28 </ b> A, 28 </ b> B, and 28 </ b> C over the outer periphery of the shaft 24. As shown in FIGS. 2 and 3, the first propeller portion 28 has a function of flowing air from one axial end of the shaft 24 toward the other axial end. A second propeller portion 30 for generating an air flow is provided on the other end side in the axial direction of the shaft 24. The second propeller unit 30 rotates with the rotation of the shaft 24. Similar to the first propeller portion 28, the second propeller portion 30 is configured by attaching three blade portions (not shown) over the outer periphery of the shaft 24. The second propeller portion 30 has a function of flowing air from one axial end of the shaft 24 toward the other axial end.

  The ultraviolet irradiation head 14 has a built-in memory that stores head type information regarding the type of head, an identification unit that displays identification information for distinguishing the head from other head units, and the like.

  As shown in FIGS. 2 and 3, an outer air suction hole 32 is formed in the vicinity of the first propeller portion 28 of the outer casing 18. Further, an inner air suction hole 40 is formed in the vicinity of the first propeller portion 28 of the inner housing portion 38. The outer air suction hole 32 is provided on the radially outer side of the inner air suction hole 40 so as to overlap the inner air suction hole 40. Further, the outer air suction hole 32 and the inner air suction hole 40 function as one through hole that communicates the inside and the outside of the outer casing 18 and the inner casing 38. In addition, it is preferable that a plurality of the outer air suction holes 32 and the inner air suction holes 40 are formed along the outer peripheral direction of the outer casing portion 18 and the inner casing portion 38.

  Further, an outer air discharge hole 34 is formed in the vicinity of the second propeller portion 30 of the outer casing portion 18. Further, an inner air discharge hole 42 is formed in the vicinity of the second propeller portion 28 of the inner housing portion 38. The outer air discharge hole 34 is provided on the radially outer side of the inner air discharge hole 42 so as to overlap the inner air discharge hole 42. The outer air discharge hole 34 and the inner air discharge hole 42 function as one through hole that communicates the inside and the outside of the outer casing 18 and the inner casing 38. In addition, it is preferable that a plurality of the outer air discharge holes 34 and the inner air discharge holes 42 are formed along the outer peripheral direction of the outer casing 18 and the inner casing 38.

  The operation and effect of the ultraviolet irradiation head and the ultraviolet irradiation apparatus according to an embodiment of the present invention will be described.

  As shown in FIGS. 2 and 3, the UVLED 20 emits light in response to a control signal from the controller of the controller unit 12, and the drive motor 26 is driven. Thereby, an ultraviolet ray is radiated from the UVLED 20 and the ultraviolet ray resin is cured by irradiating the ultraviolet ray curable resin with the ultraviolet ray.

  Further, when the drive motor 26 is driven, the shaft 24 rotates. As the shaft 24 rotates, the first propeller portion 28 and the second propeller portion 30 rotate together with the shaft 24. When the first propeller portion 28 and the second propeller portion 30 rotate together with the shaft 24, air enters the inner housing portion 38 from the outside of the outer housing portion 18 through the outer air suction holes 32 and the inner air suction holes 40. It enters and flows from the first propeller portion 28 toward the second propeller portion 30. The air that has entered the inside of the inner casing portion 38 passes through the second propeller portion 30 and then passes through the inner air discharge hole 42 and the outer air discharge hole 34 from the inside of the inner casing portion 38. It is discharged outside the section 18. As described above, when the first propeller portion 28 and the second propeller portion 30 rotate together with the shaft 24, an air flow that travels along the axial direction of the inner casing portion 38 (shaft 24) is generated. Then, the air taken into the inside from the outside of the outer casing 18 is discharged as an air flow from the inside of the inner casing 38 to the outside of the outer casing 18.

  Here, if the UVLED 20 continues to irradiate ultraviolet rays, the UVLED 20 generates heat, and this heat spreads inside the inner casing portion 38 of the ultraviolet irradiation head 14, but as described above, the inside of the inner casing portion 38. In this case, since the air flow is generated, the heat generated from the UVLED 20 is released to the outside of the outer casing 18 together with the air flow. Thereby, heat is not trapped inside the outer casing 18 and the inner casing 38 (heat dissipation can be improved), and the UVLED 20 can be prevented from being adversely affected by heat. As a result, the reliability and stability of the UVLED 20 that is a semiconductor element can be improved.

It is a block diagram of the ultraviolet irradiation device of one Embodiment of this invention. It is the figure which showed the structure inside the ultraviolet irradiation head of the ultraviolet irradiation device of one Embodiment of this invention. It is the figure which showed the structure of the principal part of the ultraviolet irradiation head of the ultraviolet irradiation device of one Embodiment of this invention. It is a side view between AA of Drawing 2. It is sectional drawing between BB of FIG. It is sectional drawing between CC of FIG.

DESCRIPTION OF SYMBOLS 10 Ultraviolet irradiation apparatus 12 Control part 14 Ultraviolet irradiation head (head part)
16 Cable part 18 Outer case part (case part)
20 UVLED (semiconductor element)
24 Shaft (shaft part, air flow generator)
26 Drive motor (rotation drive, air flow generator)
28 1st propeller part (propeller part, air flow generation part)
30 Second propeller part (propeller part, air flow generator)
32 Outer air suction hole (through hole, air inflow hole)
34 Outer air discharge hole (through hole, air outflow hole)
38 Inside housing (housing)
40 Inside air suction hole (through hole, air inflow hole)
42 Inside air discharge hole (through hole, air outflow hole)

Claims (2)

An ultraviolet irradiation head including a semiconductor element for irradiating ultraviolet rays for curing an ultraviolet curable resin,
The ultraviolet irradiation head includes a hollow housing portion that holds the semiconductor element so as to disperse heat generated by irradiation inside.
In the hollow interior of the housing portion, the semiconductor element, the first propeller portion, the second propeller portion, the shaft, and the drive motor are provided from the one axial end to the other axial end.
The housing portion includes an air inflow hole that communicates the hollow interior and exterior of the housing portion between the semiconductor element and the first propeller portion, and the second propeller portion and the drive motor. Air outflow holes communicating between the inside and the outside of the housing portion are provided between the
The rotation of the drive motor is configured to rotate the first propeller part and the second propeller part via the shaft,
With the rotation of the drive motor, external air flows from the air inflow hole into the hollow interior of the housing portion and becomes an air flow that travels along the axial direction and flows out from the air outflow hole. An ultraviolet irradiation head characterized by An ultraviolet irradiation apparatus comprising the ultraviolet irradiation head according to claim 1.

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