JP2000330173A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a camera thin in thickness and small in size even though a capacitor is made large in its shape for storing the driving electric power required for stroboscope light emission in a camera incorporating a stroboscope light emitting part and the capacitor. SOLUTION: A planar capacitor is used for the capacitor 17 for the stroboscope light emission driving electric power, and the planar capacitor 17 and a printed wiring board 16 at which a control circuit for the various kinds of operation control of the camera is packaged are arranged in parallel inside the armor 11 of the camera, so that an outside noise is shielded by the planar capacitor 17 and also the camera can be made thin in thickness and small in size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a strobe light emitting portion, a printed circuit board having a control means for driving and controlling various operation functions of the camera, and a light emitting drive power generated and supplied to the strobe light emitting portion. The present invention relates to a configuration of a driving power capacitor.

[0002]

2. Description of the Related Art Conventionally, in a compact camera having a strobe light emitting portion and a lens shutter function, the thinning and miniaturization of a strobe light emitting capacitor for generating light emission driving power for the strobe light emitting portion are required to make the camera compact. It is a major factor. Various proposals have been made regarding the shape and arrangement of the strobe light emitting capacitor.

[0003] For example, as disclosed in Japanese Patent Application Laid-Open No. Hei 6-222432, it is necessary to secure the amount of light emission drive power supplied to a strobe light emitting unit and to efficiently arrange the strobe light emitting capacitors arranged in a camera. In order to secure a space, two strobe light emitting capacitors are provided, and these two capacitors are arranged side by side at a predetermined interval in the thickness direction of the camera. It has been proposed that a light emitting circuit board on which the light emitting electric component is mounted is arranged along the capacitor so that the component is located.

[0004]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 6-222 is disclosed.
No. 432 discloses that by using two capacitors,
The power for strobe light emission is secured, and a wasteful space between the two capacitors is provided by disposing a light emitting electric component mounted on a light emitting circuit board,
It effectively utilizes the wasted space.

However, the use of two strobe light emitting capacitors requires securing an arrangement space required for disposing at least two capacitors in the thickness direction of the camera. It becomes a hindrance factor to the reduction in thickness.

In general, a control drive circuit board mounted with various electric components constituting a control circuit for controlling and driving various operation functions such as shutter speed, exposure, and focus adjustment of a camera prevents malfunction due to external noise. For this purpose, the control and drive circuit board is covered with a noise shielding shield and is disposed at a predetermined position inside the camera housing.

The provision of the noise shielding shield of these circuit boards hinders the thinning and miniaturization of the camera due to the setting of the arrangement position and the arrangement space of the circuit board inside the camera housing.

In view of the above-mentioned problems, the present invention provides a printed circuit board on which control means for driving and controlling various operation functions of a camera are mounted, and a driving power capacitor for generating and supplying light emission driving power to the strobe light emitting section. The purpose is to do.

[0009]

SUMMARY OF THE INVENTION A camera according to the present invention is a control means for driving and controlling an optical lens for photographing a subject and a lens frame having a built-in shutter function, and for driving and controlling functions for adjusting shutter speed, exposure and focus. A printed circuit board unit on which an electric circuit is mounted, a strobe light emitting unit for emitting and projecting illumination light to the subject, a light emission drive control unit for the illumination light projected from the strobe light emission unit, and a light emission drive power A strobe drive control unit having a unit, and a drive power capacitor having a planar portion for generating light emission drive power to be supplied to the strobe light emission unit from the light emission drive power unit of the strobe drive control unit, The printed wiring board portion is arranged in parallel with a planar shape portion of a power capacitor, and is arranged in a housing.

Further, the printed wiring board portion of the camera according to the present invention has a bendable portion, and the drive power capacitor is sandwiched between opposing surfaces of the printed wiring board portion bent at the bent portion. It is characterized by holding.

Further, the printed wiring board portion of the camera according to the present invention is formed of a flexible printed wiring board.

Still further, the drive power capacitor of the camera according to the present invention is characterized in that the drive power capacitor is arranged in parallel with a surface or a portion of the printed wiring board on which various control means are not mounted.

In the camera according to the present invention, the condenser used for generating and supplying the driving power for strobe light emission has a planar shape.
In addition, by holding the printed wiring board on which various control means are mounted in parallel with the planar capacitor, the camera can be made thinner in the thickness direction, and is fixed to the capacitor of the printed wiring board. The surface noise shielding shield eliminates the need to provide a special noise shielding shield because the capacitor has a noise shielding effect, and it is possible to further reduce the size and size of the camera.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a front perspective view showing the configuration of a first embodiment of a camera according to the present invention, in which the exterior of the camera is cut.
FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 and FIG. 3 is a cross-sectional view of a capacitor used as a driving power source of a strobe light emitting unit used in the camera according to the present invention. .

In the camera according to the present invention, as shown in FIG. 1, a lens frame 12 having a built-in photographing lens having a shutter function is arranged at the center of the front of an exterior 11 of the camera. Above the mirror frame 12, a finder 13 for the photographer to see the subject, a distance measuring means 14 for measuring the distance to the subject, and a strobe light emitting unit 15 for irradiating the subject with illumination light are arranged. I have.

Controls various operations of the camera, such as drive control of the lens frame 12, distance measurement control by the distance measuring means 14, exposure control by a release switch (not shown), and film winding and rewinding drive control. A main printed wiring board 16 on which a control circuit is mounted is arranged inside the exterior 11 on the left side of the lens frame 12 in the figure. In addition, on the upper part of the main printed wiring board 17, a strobe printed wiring board 18 on which a drive control circuit of the strobe light emitting unit 15 is mounted is arranged.

Further, it comprises a capacitor 17 for storing strobe light emission drive power energy supplied to the strobe light emitting section 15 via the strobe printed wiring board 18.

As shown in FIG. 2, the main printed wiring board 16 is disposed inside the exterior 11 so as to be perpendicular to the height direction when viewed from the front of the camera. The main printed wiring board 16 extends from an internal housing 19 disposed inside the exterior 11.
The upper end of the main printed wiring board 16 is fixed by an engagement piece 19b with which a lower end of the main printed wiring board 16 is engaged.

The engaging piece 19b is, as shown in FIG.
The tip has an inclined surface, and swings in the direction indicated by arrow B in the figure to engage and fix the lower end of the main printed wiring board 16.

The main and strobe printed wiring boards 16 and 18 and various operation control functions of the camera are electrically connected to each other (not shown). The electronic flash unit 15 is electrically connected to the condenser 17.

The capacitor 17 is controlled by a charging / discharging circuit mounted on the printed circuit board 18 for strobe light.
Power energy for strobe light emission is stored, and the stored power energy is supplied to the strobe light emitting unit 15.

The capacitor 17 is disposed on the side of the exterior 11 on the front side of the main printed wiring board 17 when viewed from the front of the camera.

As shown in FIG. 3, the capacitor 17 has a rectangular planar shape in cross section, and a cathode electrode 22 and an anode electrode 23 face each other inside a space of a case 21 formed of aluminum or the like. It is arranged.

The cathode electrode 22 and the anode electrode 23
Although formed of an aluminum material, the anode electrode 23
Uses an electrode in which the surface of the electrode is electrolytically oxidized to form a dielectric film 24. An electrolytic solution 27 is filled in the case 17 in which the cathode electrode 22 and the anode electrode 23 having the oxidized dielectric film 24 are inserted, and the upper surface of the case 21 is provided with an electrolyte sealing cab. Sealed at 28.

A so-called electrolytic capacitor having a configuration in which a cathode terminal 25 and an anode terminal 26 having the sealing cap 28 inserted therein are connected to the anode electrode 23 having the cathode electrode 22 and the oxide dielectric film 24 is used. Can be

Alternatively, although not shown, the capacitor 17 is formed by alternately stacking dielectrics and electrodes.
It is also possible to use a so-called multilayer capacitor or the like.

That is, the capacitor 17 is the above-mentioned electric field capacitor or multilayer capacitor, and has a thin rectangular shape and a planar rectangular capacitor having a large planar area.

The capacitor 17 is bonded and fixed to a surface of the main printed wiring board 16 on which the various electric components 16a to 16c are not mounted. Although not shown, a circuit pattern for connecting the electric components 16a to 16c is formed on the surface of the printed wiring board 16 on which the electric components 16a to 16c are not mounted, and the circuit pattern and the electric component 16a After connecting the capacitors 16 to 16c, an electrical insulation process is performed, and then the capacitor 17 is bonded and fixed.

The main printed wiring board 16 and the capacitor 17 may not be directly adhered and fixed but may be provided together with a slight gap. In this case, in order to fix the capacitor 17 in parallel with the main printed wiring board 16, the board fixing groove 19 a extending from the internal housing 19 and the engaging piece 19 b are similar to the fitting groove 19 a. The fitting groove and the engaging piece for fixing the capacitor are provided and fixed.

The fixing of the main printed wiring board 16 and the capacitor 17 to the inner casing 19 in the exterior 11 is not limited to the above-described board fixing groove 19a and the engaging piece 19b. It is also possible to use a mounting and fixing method using a screw or an adhesive.

As described above, the capacitor 17 is disposed inside the front of the exterior 11 of the camera, perpendicularly to the height direction of the camera, and from the front of the inside of the exterior 11, and on the back side of the capacitor 17. The main printed wiring board 16
Are arranged side by side, the arrangement space of the main printed wiring board 16 and the capacitor 17 of the camera exterior 11 is limited by the thickness of the main printed wiring board 16 on which the electric components 16a to 16c are mounted, and the thickness of the capacitor 17 And a depth dimension of the camera can be reduced.

Further, the capacitor 17 is disposed in front of the main printed wiring board 16 when viewed from the front of the camera,
In addition, since the external case 21 of the capacitor 17 is grounded, external noise incident from the front of the camera can be shielded in a wide range by the capacitor 17, and a shield for external noise shielding of the main printed wiring board 16 is separately provided. You don't have to.

In general, a film winding space having a film spool (not shown) is provided on the inner back side of the exterior 11 on which the capacitor 17 and the main printed wiring board 16 are arranged. The space, the main printed wiring board 16 and the housing portion of the capacitor 17 are separated by a separating member, and a shield foil is attached to the separating member, or the separating member is formed of a separating material mixed with a conductive material. As a result, external noise is shielded from the back of the camera.

In the above-described embodiment of the present invention, the capacitor 17 is disposed on the exterior 11 side of the camera surface. However, the main printed wiring board 16 is disposed on the exterior 11 side of the camera front, and the main printed wiring board 16 It is also possible to arrange the capacitor 17 on the back side, in this case, external noise from the back side of the camera will be shielded by the capacitor 17, inside the exterior 11 on the camera surface,
A shield is attached or formed using an exterior material mixed with a conductive material to shield external noise from the front of the camera.

Next, a second embodiment of the camera according to the present invention will be described with reference to FIG. FIG. 4 is the same as FIG.
1 is a cross-sectional view of the exterior 11 seen from the top of the camera shown in FIG.

A main printed wiring board 16 ′ similar to the main printed wiring board 16 is provided inside the camera exterior 11.
Extends from the inner housing 19 into the fitting groove 19a 'for fixing the board.
And an engagement piece 19b ', which is attached and fixed in a horizontal direction when viewed from the upper surface of the exterior 11 of the camera.

On the lower surface side of the printed wiring board 16 'in the figure, a capacitor 17' having the same planar shape as the capacitor 17 is bonded and fixed to the main printed wiring board 16 '.

Reference numeral 30 disposed on the upper surface side of the main printed wiring board 16 ′ is a display means composed of a liquid crystal element or the like for displaying the number of frames for film shooting, date and time, various shooting modes, and the like. .

As described above, the main printed wiring board 16 '
And the condenser 17 'are arranged on the upper surface of the exterior 11 of the camera, so that the size in the height direction of the camera can be reduced, and a more compact camera can be provided. Furthermore, the capacitor 17 'is also protected against the external noise.
As a result, it is possible to provide a camera with improved noise shielding.

In the second embodiment, the installation position of the capacitor 17 'is different from that of the main printed wiring board 16'.
Although described on the lower surface side, it is apparent that the same effect as described above can be obtained by arranging it on the upper surface side.

Next, regarding a third embodiment of the present invention,
This will be described with reference to FIG. FIG. 5 is an enlarged sectional view of a portion where the main printed wiring board and the capacitor are arranged inside the exterior 11 of the camera, and the same portions as those in FIG.

The difference between the first embodiment shown in FIG. 1 and the third embodiment shown in FIG.
Instead of using a new main printed wiring board 31. This new main printed wiring board 31 integrally forms a first printed wiring board part 31a having a bent part 32 and a second printed wiring board part 31b.

For example, the first printed wiring board section 31a includes the electric components 32a to 32d of the various operation control circuits and the camera as well as the electric components and circuit patterns mounted on the main printed wiring board 16. A connector 32e connected to various operation switches and the distance measuring means 14 and the like is mounted, and a circuit pattern for connecting the electrical components 32a to 32d and the connector 32e is formed on the back surface.

The second printed wiring board section 31b is provided with electric components mounted on the strobe board 18 and a circuit pattern (not shown in the drawing).

The first and second printed wiring board sections 3
The electric components and the circuit patterns mounted on 1a and 31b may be provided by dividing the electric components and the circuit pattern of the main printed wiring board section 16 and the strobe boards 18 may be separately provided.

The bent portion 32 is formed with a connection wiring network for connecting the circuit patterns of the first and second printed wiring portions 31a and 31b.

The main printed wiring board 31 is bent to the back side at the bent portion 32 to form the first printed wiring portion 31.
The capacitor 17 is disposed on the back side of the second printed wiring portion 31b opposite to the capacitor 17a.

That is, the capacitor 17 is connected to the first and second printed wiring board portions 31a of the main printed wiring board 31.
And 31b so as to be sandwiched, and to be disposed in a predetermined inside of the exterior 11 of the camera.

At this time, the back surfaces of the first and second printed wiring board portions 31a and 31b are subjected to insulation treatment, and are adhered and fixed to the capacitor 17.

As a result, the main printed wiring board 31
In addition, it is possible to reduce the thickness of the capacitor 17 and shorten the space for disposing the capacitor 17. Further, the first and second printed wiring board sections 3
The portion between 1a and 31b is shielded by the capacitor 17, so that external noise and electrical interference between the first and second printed wiring portions 31a and 31b can be shielded.

In the third embodiment, even if the capacitor 17 is completely sandwiched by the main printed wiring board 31 or if a part of the capacitor 17 protrudes from the main printed wiring board 31, the noise or the noise is substantially reduced. Alternatively, it is preferable that the arrangement be any shape as long as interference between the printed wiring board portions 31a and 31b can be shielded.

The main printed wiring board 31 and the capacitor 17 are fixed to the inside of the exterior 11 by fixing the main printed wiring board 31 to the camera internal housing 1 shown in FIG.
9, a main board fitting groove 19a and an engaging piece 19b
It is also possible to fix the capacitor 17 to the inner housing 19 with screws or an adhesive. In particular, the arrangement and fixing inside the camera exterior 11 are described above. However, the present invention is not limited to this method.

Further, the first and second printed wiring board sections 3
It is also possible to integrally form 1a, 31b and the bent portion 32 using a flexible printed circuit board.

As described above, according to the present invention, the main printed wiring boards 16 and 31 are arranged in the camera exterior 11 together with the planar capacitor 17 for supplying drive power to the strobe light emitting section 15. Thereby, the camera can be made compact and compact, and the capacitor 17 also has a function of shielding against external noise, so that external noise can be prevented from entering the main printed wiring boards 16 and 31. Become.

In the above embodiment of the present invention,
An example in which electric components 16a to 16c and 32a to 32d are mounted on one surface of the main printed wiring boards 16 and 31, and a circuit pattern for connecting the electric components 16a to 16c and 32a to 32d is provided on the other surface. Was explained using
Obviously, it is also possible to use a printed wiring board provided with a circuit pattern on the same surface as the electric components 16a to 16c and 32a to 32d.

[0056]

According to the present invention, there is provided a printed wiring in which a capacitor having a flat shape is used as a strobe driving power capacitor for storing driving power for strobe light emission, and at least a control circuit function of various operation means of a camera is mounted on the flat capacitor. By arranging the substrates in parallel, the camera can be made thinner and smaller.

Further, by disposing the planar capacitor on the exterior surface side of the camera, external noise is shielded, and malfunction of the various operation control circuit functions mounted on the printed wiring board due to external noise is surely prevented. It has an effect that can be prevented.

Further, by arranging the planar capacitor so as to be sandwiched by the printed wiring board, the space required for arranging the planar capacitor and the printed wiring board arranged inside the camera is reduced, thereby reducing the thickness of the camera. In addition to miniaturization and shielding of external noise, it has an effect that interference between printed wiring boards can be shielded.

[Brief description of the drawings]

FIG. 1 is a front perspective view showing the configuration of an embodiment of a camera according to the present invention, in which an exterior of the camera is cut.

FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1;

FIG. 3 is a cross-sectional view of a capacitor used as a drive power source for a strobe light emitting unit used in the camera according to the present invention.

FIG. 4 is a top sectional view showing the configuration of another embodiment of the camera according to the present invention.

FIG. 5 is a sectional perspective view showing the configuration of another embodiment of the camera according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 ... Exterior 12 ... Mirror frame 13 ... Finder 14 ... Distance measuring means 15 ... Strobe light emitting part 16 ... Main printed circuit board 17 ... Strobe light emission drive source capacitor 18 ... Strobe printed circuit board 19 ... Inner housing

Claims (4)

[Claims] 1. A printed wiring having mounted thereon an electric circuit constituting a control means for controlling the drive of a lens frame having a built-in optical lens for photographing a subject and a shutter function and controlling functions of adjusting a shutter speed, exposure and focus, etc. A substrate unit; a strobe light emitting unit that emits and emits illumination light to the subject; a strobe drive control unit that includes a light emission drive control unit and a light emission drive power unit of the illumination light projected from the strobe light unit; A drive power capacitor having a planar shape portion for generating light emission drive power to be supplied from the strobe drive control portion to the strobe light emitting portion, wherein the printed wiring board portion is provided on the planar shape portion of the drive power capacitor. A camera which is arranged side by side and arranged inside an exterior housing. 2. The printed wiring board section has a foldable bendable section, and the driving power capacitor is sandwiched and held by a surface of the printed wiring board section bent at the bent section. The camera according to claim 1, wherein: 3. The camera according to claim 1, wherein the printed wiring board is formed of a flexible printed wiring board. 4. The camera according to claim 1, wherein the drive power capacitor is provided in parallel with a surface or a portion of the printed wiring board on which various control means are not mounted.