JP2008185816A - Led device for movable flashlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a simple mechanism for moving a lens unit and an LED unit for flashlight of portable equipment with camera longitudinally in a subject direction in association with each other. <P>SOLUTION: A cam 107 is formed by coaxially integrating a pair of a lens unit drive cam 110 and an LED unit drive cam 109 having different outside diameters, and spiral inclined surfaces 109a and 110a are respectively provided on the upper surfaces of the LED unit drive cam 109 and the lens unit drive cam 110 relative to the rotational angle of the cam 107, then the spiral inclined surfaces 109a and 110a and contacts 105a and 118a formed in short handle-like drive parts of the LED unit 103 and the lens unit 111 are brought into contact with each other, thereby forming a moving mechanism in a longitudinal direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a configuration of a movable flashlight LED device that is mounted on a camera-equipped mobile device such as a mobile phone and can change the directivity of irradiation light with respect to a subject.

  Recent technological development of mobile devices such as mobile phones is remarkable, and the number of models equipped with cameras is increasing. Products that have sensors with a pixel count of several millions using CCD and C-MOS, and focusing and zoom mechanisms, are being offered to the market one after another. A product with a flashlight mechanism using LEDs has also appeared, and its function is close to that of a digital camera.

  However, in the current product, the autofocus mechanism and the LED device for the flashlight are linked to the subject, and the directivity can be given to the irradiated light, and the configuration that can be reduced in size and thickness has been realized. Absent. One of the problems is that the LED device for the flashlight is usually fixedly disposed on the mother board near the camera module, so that the flashlight LED is small for a subject in the distance. Although it has the advantage of low power consumption, it not only has a much smaller amount of light than a flashlight using a xenon tube, but it is difficult to obtain sufficient imaging without directing the irradiation light as it is. For this reason, it is necessary to make an effort to improve the shortage of light quantity by the LED by using an apparatus in consideration of directivity. Another problem is that, for example, a structure of a movable flashlight LED device that can be interlocked with a lens mechanism capable of autofocusing has not been proposed with a simple mechanism.

  One example of turning on / off a conventional flash light for a typical camera is JP-A-2003-91036 (hereinafter referred to as Cited Document A). Cited Document A is intended to reduce the size of a drive source for projecting or housing an illumination unit and a camera on which the illumination unit is mounted by the driving force of a lens barrel. The paragraph (0037) is described below with reference to FIGS. “In the main switch 10, a permanent magnet (second magnetic body) 10a is provided at the protruding portion at a position facing the bottom surface portion of the strobe box 4. The magnetic pole on the upper side of the permanent magnet is a strobe. It is the same as the inner magnetic pole in the permanent magnet 4e provided in the box 4 (a magnetic pole different from the magnetic pole of the outer part, for example, the S pole). "Also, the explanation is based on FIGS. 6 (a) and 6 (b). As described above, the permanent magnet 10a provided in the main switch 10 is magnetically attracted and repelled by the magnetic poles N and S of the permanent magnet 4e provided in the strobe box 4 changing the polarity of the opposing magnetic poles by the slide of the main switch 10a. It is a configuration that measures the storage and protrusion of the strobe case in the camera body using the force generated.

Also, Japanese Patent Laid-Open Publication No. 63-2030 discloses the following technique based on FIG. 1 of the specification. The lens block 1 is moved to and from the rack 53b by the gear group 51 and 52 via the pinion 50 that engages with the gear 15 on the lens barrel 1 together with the distance movement of the lens barrel block 1 by the zoom motor 5. The zoom finder optical 8 and the variable flash device 9 are moved by the flash cam groove 57 and the zoom cam groove 55 provided on the cam plate 53.
JP 2003-91036 A JP 63-2030 A

  As is apparent from the above description, the conventional example as shown in FIGS. 1 to 7 of Document A has the following drawbacks when applied to a portable device as it is. (1) The shape is too large for a camera and a mobile device, particularly a mobile phone. (2) The irradiation angle of the irradiation light cannot be made variable because there is no perspective movement of the irradiation device in accordance with a near object. (3) Due to the structure, it is difficult to adapt to mobile phones that are required to be smaller and thinner. Further, the technique disclosed in Document B is configured such that the finder optical system and the strobe optical system are configured as a variable magnification finder optical system and a variable illumination angle strobe device in conjunction with zooming. According to the document B, the zoom mechanism and the flash mechanism are interlocked, but the mechanism is composed of a gear group, a rack, a far-moving cam, a far-moving cam groove, and the like, and it is complicated and has a large shape. It cannot be stored on the phone.

The present invention eliminates the above-mentioned drawbacks and solves the problems. The basic means according to claim 1 of the movable flashlight LED device of the present invention is a lens unit having an autofocus function. In the LED device for flashlights having a LED unit that gives directivity to irradiated light, and a mechanism that can move the lens unit and the LED unit in the direction of the subject at the same time,
A pair of lens unit driving cams and LED unit driving cams having different outer diameters are coaxially integrated to form a cam, and the upper surface of the lens unit driving cam and LED unit driving cam is spiral with respect to the rotation angle of the cam. And a moving mechanism in the perspective direction is configured by contacting the spiral inclined surface with a contact formed on the lens unit and the short handle driving portion of the LED unit. is there.

  The LED unit of the basic means according to claim 2 of the LED device for a movable flashlight of the present invention made to solve the problem, the LED unit comprises an LED chip mounted on a circuit board, The reflection surface irradiated from the LED chip is disposed at the center of the LED unit formed in a cup shape having a parabolic shape, the contact unit and the LED unit support shaft are provided in the driving unit of the LED unit, and the cam A contact formed on the spiral inclined surface of the LED driving cam and the short handle driving portion of the LED unit is brought into contact with the lens unit and moved in the perspective direction in accordance with the rotation of the cam. And a directivity of reflected light of the LED unit is variable.

  The lens unit of the basic means according to claim 3 of the LED device for the movable flashlight of the present invention made to solve the problem, the lens unit is a short handle driving unit of the lens unit. The lens has a contact unit and a lens unit supporting shaft, and contacts the contact formed on the spiral inclined surface of the lens driving cam on the cam and the driving unit of the lens unit, and the lens according to the rotation of the cam. It is characterized in that a mechanism that moves in the perspective direction in conjunction with the unit is formed.

  In order to solve the problems, the cam of the basic means according to claim 4 of the LED device for the movable flashlight of the present invention has a different outer diameter on the same axis of the cam and is high with respect to the rotation angle. The LED driving cam and the lens driving cam having an inclined surface whose length changes linearly are stacked in the thickness direction.

  According to the present invention, using a movable flashlight LED device mounted on a mobile device, particularly a mobile phone, an LED flashlight having a small directivity for close-up photography, and a sharp directivity LED for telephoto photography. Since a flashlight can be obtained, the quality of shooting can be improved.

  In addition, according to the movable flashlight LED device of the present invention, it is possible to achieve excellent cost / performance because the lens unit and the LED unit can be moved toward and away from the subject by interlocking with a simple mechanism.

  The point of the basic configuration of the present invention is that a pair of lens unit drive cams and LED unit drive cams having different outer diameters are coaxially overlapped and integrated to form a cam and spiral with respect to the rotation angle of the cam. And a moving mechanism in a perspective direction is formed by abutting the spiral inclined surface and a contact formed on the lens unit and the short handle driving portion of the LED unit. is there.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view of a camera unit with a movable flashlight LED device according to an embodiment of the present invention. 2 is a schematic view of the configuration of the movable flashlight LED device of the embodiment of the present invention. FIG. 3 is an exploded view of each part of the LED device for the movable flashlight according to the embodiment of the present invention. FIG. 4 is a diagram for explaining the operation of the components shown in FIG. FIG. 5 is a main configuration diagram of the lens unit of the movable flashlight LED device according to the embodiment of the present invention. 6 is a cross-sectional view taken along line AA in FIG. It is principal sectional drawing at the time of close-up photography of the example of the present invention. FIG. 7 is a perspective view of the LED unit of the movable flashlight LED device according to the embodiment of the present invention. FIG. 8 is a perspective view of the cam of the movable flashlight LED device according to the embodiment of the present invention. 9 is a perspective view of an LED unit of the movable flashlight LED device according to the embodiment of the present invention, and FIG. 10 is a sectional view taken along the line BB of FIG. FIG. 11 is an explanatory diagram of reflected light of the LED device for the movable flashlight according to the embodiment of the present invention.

  1, 2, and 3, a camera unit 100 with a movable flashlight LED device according to an embodiment of the present invention includes a lens unit in a cover 120 that is formed in a convex square shape made of a resin or a metal material. 111, the LED unit 103 mounted on the LED unit pedestal 122, the cam 107, the circuit board 102 on which the LED 101 is mounted, and the FPC 119 on which a plurality of connection lines are formed, and laminated on the image sensor unit 115. Configured. A boss-like lens unit rotation stop 114 is mechanically engaged with the lens unit 111 that moves straight in the direction of the lens unit support shaft 112 as the cam 107 rotates. Similarly, a boss-shaped LED unit rotation stop 113 is mechanically engaged with the LED unit 103 that moves straight in the direction of the LED unit support shaft 106 as the cam 107 rotates.

  4, 5, and 6, the lens unit 111 includes a plurality of sets of lenses capable of auto-focusing, and the short-shaped lens unit driving unit 118 provided in the outer extending portion of the lens unit 111 includes a lens. A lens unit support shaft hole 118 a that engages with the unit support shaft 112 is disposed, and a lens unit contactor 118 b is formed at the tip of the lens unit driving unit 118.

  4, 7, 9, 10, and 11, the LED unit 103 is a cup-shaped LED unit having a parabolic reflecting surface 104, and a short handle provided on the outer extension of the LED unit 103. The LED unit drive unit 105 is provided with an LED unit support shaft hole 105b that engages with the LED unit support shaft 106, and an LED unit contact 105a is formed at the tip of the LED unit drive unit 105. . An IC circuit for controlling autofocus of the lens unit 111 is mounted on the circuit board 102. (The figure is omitted)

  4 and 8, the cam 107 is formed by laminating an LED unit driving cam 109 and a lens unit driving cam 110 having different outer diameters in the thickness direction. In this case, the LED unit drive cam 109 has an LED unit drive cam inclined surface 109a whose outer diameter is smaller than that of the lens unit drive cam and the height of the inclined surface changes linearly with respect to the rotation angle. In this case, the cam 110 has a lens unit drive cam inclined surface 110a whose outer diameter is larger than that of the LED unit drive cam 109 and whose height of the inclined surface changes linearly with respect to the rotation angle. When the cam 107 is rotated with respect to the cam support shaft 108 via a drive motor, for example, a stepping motor 121 (detailed illustration is omitted), the lens unit 111 is supported by the lens unit support shaft 112 and moved in the axial direction. It is supported by the LED unit support shaft 106 and moves in the axial direction.

  9 and 10, when imaging a close subject, the cam 107 rotates in the direction extending in the axial direction, the gap a between the circuit board 102 and the LED unit 103 shown in FIG. 10 is widened, and the reflected light 116 is widened. The angle increases.

  In FIG. 11, when imaging a telephoto object, the cam 107 rotates in the axial reduction direction, the gap b between the circuit board 102 and the LED unit 103 is narrowed, the spread angle of the reflected light 117 is reduced, and the irradiation light is reduced. growing. In this case, the curved LED unit reflecting surface 104 of the LED unit 103 is disposed so as to be a parabolic focus with respect to the LED 101 disposed at the center bottom of the LED unit 103.

  Next, the operation of the present invention will be described. When the cam 107 rotates by the rotation angle designated by the motor with which the cam 107 is engaged, the LED unit contact 105a that is in contact with the LED unit drive cam inclined surface 109a and the lens unit drive cam inclined surface 110a are contacted. The lens unit contactor 118a moves far and near along the LED unit support shaft 106 and the lens unit support shaft 112, respectively. At this time, the bifocal control can be performed due to the circle so that the lens unit 111 is aligned with the autofocus. Correspondingly, the directivity of the irradiation light to the subject of the LED unit 103 is changed in two stages. By doing so, it is possible to improve the quality of imaging.

  In the present invention, the lens unit 111 has a two-focus autofocus function in conjunction with the movable flashlight of the LED, but it is obvious that a zoom function may be added in addition to the lens unit. .

  According to the present invention, it can be used for mobile devices in general, and a wide range of usage fields can be expected for PDAs, composite AV devices and the like as well as mobile phones.

It is an external view of the camera unit with the LED device for movable flashlights of the Example of this invention. It is a structure outline figure of the LED apparatus for movable flashlights of an Example of this invention. It is each component expanded view of the LED device for movable flashlights of the Example of this invention. FIG. 3 is an operation explanatory diagram of the component shown in FIG. 2. It is a lens unit main block diagram of the LED device for movable flashlights of the Example of this invention. FIG. 6 is a cross-sectional view taken along line AA in FIG. 5, and is a main cross-sectional view at the time of close-up photographing according to an embodiment of the present invention. It is a LED unit perspective view of the LED device for movable flashlights of the Example of this invention. It is a perspective view of the cam of the LED device for movable flashlights of the Example of this invention. It is a LED unit perspective view of the LED device for movable flashlights of the Example of this invention. It is explanatory drawing of the reflected light of a LED unit in the BB sectional drawing of FIG. It is explanatory drawing of the reflected light of the LED apparatus for movable flashlights of an Example of this invention.

Explanation of symbols

100 Camera unit with LED device for movable flashlight 101 LED
DESCRIPTION OF SYMBOLS 102 Circuit board 103 LED unit 104 LED unit reflecting surface 105 LED unit drive part 105a LED unit contactor 105b LED unit support shaft hole 106 LED unit support shaft 107 Cam 108 Cam support shaft 109 LED unit drive cam 109a LED unit drive cam inclined surface DESCRIPTION OF SYMBOLS 110 Lens unit drive cam 110a Lens unit drive cam inclined surface 111 Lens unit 112 Lens unit support shaft 113 LED unit rotation stop 114 Lens unit rotation stop 115 Image sensor unit 116,117 Reflected light 118 Lens unit drive part 118a Lens unit contactor 118b Lens unit support shaft hole 119 FPC
120 Cover 121 Stepping motor 122 LED unit cradle

Claims (4)

In an LED device for flashlights having a lens unit having an autofocus function, an LED unit that gives directivity to irradiated light, and a mechanism capable of simultaneously moving the lens unit and the LED unit toward and away from a subject,
A pair of lens unit driving cams and LED unit driving cams having different outer diameters are coaxially integrated to form a cam, and the upper surface of the lens unit driving cam and LED unit driving cam is spiral with respect to the rotation angle of the cam. The movable type is characterized in that a moving mechanism in the near and far direction is configured by abutting the spiral inclined surface and a contact formed on the lens unit and the short handle driving portion of the LED unit. LED device for flashlight.   The LED unit has an LED chip mounted on a circuit board disposed in a central portion of the LED unit formed in a cup shape in which a reflecting surface irradiated from the LED chip has a parabolic shape. The drive unit is provided with a contact and an LED unit support shaft, and the cam formed by contacting the spiral inclined surface of the LED drive cam on the cam and the contact formed on the short drive unit of the LED unit. 2. The movable flashlight according to claim 1, wherein a mechanism that moves in a perspective direction in conjunction with the lens unit according to rotation of the lens unit is formed, and the directivity of reflected light of the LED unit is variable. LED device.   The lens unit has a contact and a lens unit support shaft in a short handle-like driving portion of the lens unit, and is formed on a spiral inclined surface of the lens driving cam on the cam and a driving portion of the lens unit. The movable flashlight LED device according to claim 1, wherein a mechanism is formed in which the contactor is brought into contact with the lens unit and moves in a perspective direction in accordance with rotation of the cam. The cam is configured by laminating the LED driving cam and the lens driving cam having an inclined surface whose outer diameter is coaxial with the cam and whose height changes with respect to the rotation angle in the thickness direction. The movable flashlight LED device according to claim 1, wherein the LED device is movable.

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