JP2010181735A - Stroboscopic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stroboscopic device capable of effectively suppressing leakage of trigger discharge in light-emitting operation with a small number of members and with simple constitution. <P>SOLUTION: The stroboscopic device 14 includes a xenon tube which emits light, a reflector which reflects emitted light from the xenon tube, a trigger coil 11d which performs light emission trigger of the xenon tube, an electric substrate 11 which has an island portion 11x on which the trigger coil 11d is mounted, and a covering means 21 which electrically covers the island portion and the trigger coil 11d so as to surround them. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a strobe device, and more particularly to a structure that suppresses non-emission (non-emission, non-emission, non-emission) at the time of light emission in a flash light emitting device that emits auxiliary light when taking a picture or the like .

  2. Description of the Related Art Conventionally, a camera that takes a photograph or the like has a flash light emitting device (hereinafter referred to as a strobe device) that emits auxiliary light to illuminate the subject when the environment around the subject to be photographed is dark. Are widely used.

  In such a conventional camera with a built-in strobe device, an electric circuit related to the strobe device and a main circuit of the camera, etc., are arranged on the same substrate (so-called main substrate) in consideration of the layout of internal components for miniaturization design and the like. ) There are cases where it is implemented above.

  In general, there are electrical components that generate a high voltage, such as a trigger coil, in the electrical components that constitute the electrical circuit of the strobe device. High voltage generated from such electrical components may adversely affect other electrical components inside the camera. For example, when such a high voltage is generated during photographing with a light emitting operation, there is a problem that the strobe device does not emit strobe light, or noise is mixed into the photographed image signal.

  In view of this, various conventional techniques for preventing leakage of high voltage generated from the trigger coil of the strobe circuit have been proposed in Japanese Patent Application Laid-Open No. 2006-98980 and the like.

  The technique disclosed by the said Unexamined-Japanese-Patent No. 2006-98980 etc. is covering a trigger coil with a cover member.

  In other words, the high voltage generated when the strobe device emits light is configured not to be transmitted to other members (light receiving element as an example). Prevents high voltage leakage.

JP 2006-98980 A

  However, the technique disclosed in Japanese Patent Application Laid-Open No. 2006-98980 and the like has a production problem that a cover member as a housing is prepared and the assembling thereof takes time.

  The present invention has been made in view of the above-described points, and the purpose thereof is that trigger discharge leaks when the auxiliary light is emitted using a strobe device. It is an object of the present invention to provide a strobe device that can suppress non-light emission of a generated strobe with a simple configuration using a small number of members.

  To achieve the above object, a strobe device according to the present invention includes a xenon tube that emits light, a reflector that reflects light emitted from the xenon tube, a trigger coil that triggers light emission of the xenon tube, and the trigger coil An electrical substrate having an island portion on which is mounted, and a covering means for performing electrical coating so as to surround the island portion and the trigger coil.

  According to the present invention, the strobe capable of suppressing the non-emission of the strobe generated due to the leakage of the trigger discharge when the auxiliary light is emitted using the strobe device with a simple configuration with few members. An apparatus can be provided.

1 is an external perspective view of a camera including a strobe device according to an embodiment of the present invention. The exploded perspective view which decomposes | disassembles and shows the camera of FIG. FIG. 2 is an external perspective view mainly showing a rear side by taking out the internal main unit of the camera of FIG. 1. The disassembled perspective view which decomposes | disassembles and shows the internal main unit of FIG.

  The present invention will be described below with reference to the illustrated embodiments.

  One embodiment of the present invention is shown by taking as an example a camera to which the present invention is applied and which has a strobe device having the characteristic configuration of the present invention. As an example of this camera, for example, an optical image formed by an optical lens is photoelectrically converted using a photoelectric conversion element such as an imaging element, and digital data representing a still image or a moving image is generated based on an image signal obtained thereby. 2 illustrates a camera which is an electronic imaging device configured to be recorded.

  In the present embodiment, the surface facing the subject when the camera is used is referred to as the front surface of the camera. The surface that the user faces when using the camera is called the back of the camera. The surface of the operation member on which the shutter release button is disposed is referred to as the upper surface. A surface facing the upper surface of the camera is referred to as a bottom surface. Further, the surfaces disposed on both sides in the normal use state of the camera are referred to as the left side surface and the right side surface. In this case, the left / right distinction is made according to the left side or the right side of the camera when the front side of the camera is viewed from the subject side.

  FIG. 1 is an external perspective view of a camera including a strobe device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the camera of FIG. 1 in an exploded manner. FIG. 3 is an external perspective view showing the back side mainly by taking out the internal main unit of the camera of FIG. 4 is an exploded perspective view showing the internal main unit of FIG. 3 in an exploded manner.

  First, prior to describing the details of the strobe device according to an embodiment of the present invention, the configuration of a camera incorporating the strobe device will be briefly described below with reference to FIGS.

  As shown in FIGS. 1 and 2, the camera 1 is mainly composed of a front cover 2, a back cover 3, an internal main unit 4 including a strobe device 14, an imaging unit 5, and the like. .

  The front cover 2 and the back cover 3 are exterior members provided so as to cover the outer surface of the camera 1. The front cover 2 and the back cover 3 are formed, for example, by processing a metal thin plate member.

  The front cover 2 is formed so as to mainly cover the front surface, the left and right side surfaces, the top surface, and the bottom surface of the camera 1. On the front surface of the front cover 2, a hole 2a in which a flash light emitting portion of the strobe housing 14a of the strobe device 14 is disposed and a hole 2b in which the lens barrel portion 5a of the imaging unit 5 is disposed are formed. Yes. On the upper surface of the front cover 2, a power button 15a, a shutter release button 15b, a zoom button 15c, and the like among the various operation members 15 of the camera 1 are disposed.

  The back cover 3 is formed so as to mainly cover the back surface of the camera 1. The back cover 3 is provided with a display device 3a and a plurality of operation members 15 (for example, a mode selection dial 15d). The display device 3a is made of, for example, a liquid crystal display device, and is arranged so that the display screen portion faces the outer surface. The display device 3a functions as a finder that is an image observing means at the time of photographing use by continuously displaying image signals continuously acquired by the image sensor during the photographing operation of the camera 1. . On the other hand, during the playback operation of the camera 1, the camera 1 functions as image playback means for displaying a playback image based on image data recorded on a recording medium or the like in various display forms.

  The imaging unit 5 is a unit formed by a plurality of constituent members that are necessary during the shooting operation of the camera 1. The imaging unit 5 includes a lens barrel portion 5a, an imaging portion (not shown), and the like.

  Although the detailed illustration is omitted in the drawings and is not labeled, the lens barrel 5a is, for example, a photographing optical system and its drive mechanism, a diaphragm mechanism, a shutter mechanism, and the like, and a drive that drives each mechanism. It consists of parts. The imaging unit includes a plurality of electrical components including a photoelectric conversion element including an imaging element such as a CCD (Charge Coupled Device), a CMOS (Complementary Metal Oxide Semiconductor), and the like. The circuit unit or the like forms an electric circuit or the like for performing various signal processing based on the output from the photoelectric conversion element. Note that the lens barrel 5a, the imaging unit, and the like have the same configuration as that of a conventional general camera. Therefore, for example, the imaging unit may include an image blur correction mechanism that shifts the photoelectric conversion element to perform image blur correction in addition to the above configuration.

  Next, the configuration of the internal main unit 4 configured to include the strobe device 14 of the present embodiment will be described below with reference mainly to FIGS.

  The internal main unit 4 includes a main board 11 formed of, for example, a hard electric board, a strobe housing 14a and a strobe capacitor 12 constituting the strobe device 14 of the present embodiment, a frame unit 13, and the like. .

  The main board 11 has various electric circuits for controlling the operation of the camera 1 (for example, a main control circuit for controlling the entire camera 1, a light emission control circuit for the strobe device 14, a power supply circuit, a recording control circuit, a display control circuit). , Operation unit circuit, etc.) are implemented. For this purpose, on the main board 11, for example, a main CPU, a recording medium storage portion 11a, a battery contact 11b, a self-timer lamp 11c, a trigger coil 11d, operation components such as an operation switch, a strobe device 14 and a capacitor 12 Etc., lead wires 11e and the like extending from the terminals are connected to predetermined portions by means of soldering or the like. The main board 11 is provided with connectors for connecting a flexible printed circuit board 3b (see FIG. 2) extending from the display device 3a.

  The frame unit 13 forms a battery chamber 13a for fixing and supporting components (units) such as the main substrate 11 and the strobe device 14 and holding a power supply battery (not shown). A predetermined portion on the front side of the frame portion 13 has a discharge spring 13b for discharging the loaded power source battery to the outside of the battery chamber. The discharge spring 13b is connected to the ground of the main board 11. (See FIGS. 1 and 4). Further, when the internal main unit 4 is in an assembled state (when the main substrate 11 and the frame portion 13 are integrated as shown in FIG. 3), the battery contacts 11 b of the main substrate 11 are connected to the frame portion 13. A hole 13c is formed in the frame portion 13 so as to be exposed to the battery chamber 13a side on the front side (see FIG. 4).

  The strobe device 14 according to the present embodiment includes a strobe housing 14 a fixedly supported on the upper surface side of the frame portion 13, a light emission control circuit on the main substrate 11, the capacitor 12, and the like.

  The strobe housing 14a includes a xenon tube that emits light, a reflective umbrella that reflects part of the light emitted from the xenon tube toward the front of the camera 1, reflected light reflected by the reflective umbrella, and the xenon tube. It is composed of a structural member such as a light-emitting diffusion plate that diffuses light emission so as to irradiate a predetermined range, and a box-shaped housing member that fixes and supports these structural members. The members are not shown.

  As described above, the light emission control circuit is mounted on the main board 11. The light emission control circuit is formed by circuit elements such as a trigger coil 11d that performs a light emission trigger of the xenon tube.

  As shown in FIG. 4, the main board 11 has an island portion 11x formed by cutting out a part of the electric board. Here, the island part 11x means a part sandwiched between the two notches 11y shown in FIG. A trigger coil 11d is mounted on the island 11x.

  An insulating cap 21 is disposed as a covering means for performing electrical covering so as to surround the island portion 11x and the trigger coil 11d.

  The insulating cap 21 is formed in a bag shape having one opening by a non-conductive electrically insulating material such as a silicone material, a rubber member, or an engineering plastic material. And it covers so that the island part 11x and the trigger coil 11d of the main board | substrate 11 may be coat | covered from opening of the insulating cap 21. FIG. That is, the insulating cap 21 is attached to the island part 11x from one direction where the opening is formed. At this time, the lead wire extended from the member (island portion 11x, trigger coil 11d) covered inside the insulating cap 21 is led out from the opening.

  With such a configuration, the insulating cap 21 prevents the non-light emission of the xenon tube that occurs due to leakage of trigger discharge from the trigger coil 11d when the strobe device 14 is operated to emit light.

  The insulating cap 21 is only disposed so as to cover the island portion 11x, and no particular fixing means or the like is used. Therefore, the inner method of the insulating cap 21 and the width dimension of the island portion 11x are set as appropriate. For example, when a material having elasticity due to elasticity, such as a silicone material or a rubber member, is used as the material of the insulating cap 21, the inner method of the insulating cap 21 is substantially the same as or slightly smaller than the width of the island portion 11x. If it sets so that it may form, when the insulating cap 21 is mounted | worn with respect to the island part 11x, it can comprise so that the insulating cap 21 may not remove easily by own elasticity.

  With this configuration, since the insulating cap 21 can be disposed without the need for fixing means, it is easy to ensure good assembling without complicating the manufacturing work.

  As described above, according to the above-described embodiment, the island portion 11x is formed on the main substrate 11 which is the electric substrate on which the light emission control circuit is mounted, and the trigger coil 11d is mounted on the island portion 11x. The island portion 11x and the trigger coil 11d are arranged so as to surround an insulating cap 21 as a covering means.

  Thus, the trigger coil 11d can be electrically covered with a very simple configuration. Therefore, the high voltage generated from the trigger coil 11d during the light emission operation of the strobe device 14 can be easily prevented from being applied to other electric circuits, and the strobe light can be reliably emitted. With this configuration, it is possible to suppress an adverse effect caused by the electromagnetic wave generated from the trigger coil 11d, and thus a good photographing result can be obtained. Further, since the island portion provided on a part of the electric substrate and the insulating cap 21 that electrically covers the island portion are provided, the size of the device itself is not increased, and the device itself is not enlarged. A small configuration can be maintained.

  In the present embodiment, the embodiment in which the light emission control circuit of the strobe device 14 is mounted on the main board 11 of the camera 1 is described as an example. However, the present invention is not limited to such a configuration. For example, the light emission control circuit of the strobe device 14 may be mounted on another substrate independent of the main substrate 11. In this case, an island portion for mounting the trigger coil 11d is formed on the separate substrate, and the island portion and the trigger coil 11d are disposed so as to be surrounded by the insulating cap 21 so as to be electrically covered. Good.

  And as a form of the insulation cap illustrated in the said one Embodiment, as shown in FIG. 4, although it is set as the quadratic prism shape which has an opening in one side, it is not restricted to this shape. In addition to this, the shape of the insulating cap 21 may be, for example, a cylindrical shape, a conical shape, a polygonal column shape, a spherical shape, or the like. That is, the insulating cap 21 may be formed in any shape as long as it covers the trigger coil 11d and extends the lead wire from the opening when attached to the island portion 11x. Absent.

  Furthermore, in the above-described embodiment, the two cutout portions 11y provided to form the island portion 11x of the main board 11 have a linear shape as shown in FIG. 4, and the island portion 11x has a substantially rectangular plane. However, the present invention is not limited to this, and the planar shape of the island portion 11x may be different from that of the above-described embodiment.

  The present invention is not limited to the above-described embodiments, and it is needless to say that various modifications and applications can be implemented without departing from the spirit of the invention. Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the effect described in the effect of the invention Can be obtained as an invention.

DESCRIPTION OF SYMBOLS 1 ... Camera 2 ... Front cover 3 ... Back cover 4 ... Internal main unit 5 ... Imaging unit 11 ... Main board 11d ... Trigger coil 11x ... Island part 11y ... Notch part 12 ... For strobe Capacitor 13 ... Frame 14 ... Strobe device 14a ... Strobe housing 15 ... Operation member 21 ... Insulation cap

Claims (3)

In the strobe device,
A xenon tube that emits light,
A reflector that reflects light emitted from the xenon tube;
A trigger coil for triggering the light emission of the xenon tube;
An electric board having an island portion on which the trigger coil is mounted;
Coating means for performing electrical coating so as to surround the island and the trigger coil;
A strobe device comprising:   2. The strobe device according to claim 1, wherein the covering means is made of an insulating material, is formed in a bag shape having one opening, and covers the island portion and the trigger coil from the opening.   The strobe device according to claim 1 or 2, wherein the covering means is made of a silicone material.

Images