KR101080409B1 - Shutter device for digital camera - Google Patents

Abstract

The present invention includes: an opening through which light passes; and a driving source for generating rotation power; and a driving pin physically connected to the driving source to rotate by a rotational force transmitted from the driving source; and a long hole for guiding the driving pin. And adjusting the light passing through the opening while being rotated about the rotation axis by an angle limited in opposite directions by the rotation force supplied from the driving pins guided along the long hole, and supported by the rotation shaft. A first shutter blade and a second shutter blade; and a digital camera shutter device having an elastic member which is supported by the driving pin and the rotating shaft to generate an elastic force in a direction of preventing rotation of the first and second shutter blades. To provide.

Description

 Shutter device for digital camera

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the cross section of the lens barrel of the digital camera of this invention.

2 is a plan view showing a drive source used in the shutter device of the present invention.

3 is a plan view showing a state in which the rotation range of the driving pin and the shutter blades open only a part of the opening in the shutter device according to the first embodiment of the present invention.

4 is a plan view showing a state in which the shutter blade of the shutter device of the first embodiment of the present invention fully opens the opening.

5 is a plan view showing a state in which the shutter blade of the shutter device of the first embodiment of the present invention completely closes the opening.

6 is a plan view showing a state in which the rotation range of the driving pin and the shutter blades completely close the opening in the shutter device of the second embodiment of the present invention.

7 is a plan view showing a state in which the shutter blade of the shutter device of the second embodiment of the present invention opens only a part of the opening.

8 is a plan view showing a state in which the shutter blades of the shutter device of the second embodiment of the present invention fully open the opening.

Description of the Related Art                 

10: lens barrel 20: opening

30 filter 40 imaging device

L: Optical path 100: Digital camera shutter device

110, 210: first shutter wing 120, 220: second shutter wing

114, 214: long hole formed in the first shutter blade

124, 224: long hole formed in the second shutter blade

140, 240: drive pin guiding part

130: drive source 131: stator

136: rotor 138: drive pin

212, 222: Introduction 132: York

133: coil 137: rotating part

139: drive arm 116: elastic member

118: axis of rotation

The present invention relates to a digital camera shutter device, and more particularly, to a digital camera shutter device that can be driven by a single drive source while simultaneously performing a function of a shutter and a function of an aperture.

In general, a digital camera converts light reflected from a subject into an electrical signal and stores it as an image signal, thereby processing and reproducing the stored image signal. Such a digital camera can directly check an image of a photographed subject without the complicated film printing work performed by a conventional film camera, and in recent years, a conventional film camera has been used due to the advantage of easy editing and processing using a digital medium. It is the next generation camera that is rapidly replacing.

Even in such a digital camera, in order to obtain a photograph by photographing according to the characteristics of the subject, the movement of the shutter blades and the opening degree of the aperture must be appropriately modified. In this case, in order to control the movement of the shutter blades and adjust the opening degree of the aperture, a method of using a plurality of driving sources capable of driving the shutter blades and the aperture, respectively, can be considered.

However, at this time, since a plurality of driving sources capable of driving the shutter blades and the apertures are required, the cost increases due to the addition of the driving sources. In addition, since the above-described digital camera has to separately include the shutter blades and the diaphragm, the device is not only complicated, so that a trouble of the afterglow may occur, and the cost of separately installing the shutter blades and the diaphragm increases. In addition, such an increase in cost is directly reflected in the manufacturing cost of the digital camera, resulting in a weakening of the price competitiveness of the digital camera.

The present invention includes solving the conventional problems as described above, the main technical problem to be achieved by the present invention is as follows.                         

First, it is intended to reduce the complexity of the shutter device and further reduce costs by having the shutter blades perform the functions of the shutter and the aperture simultaneously.

Secondly, it is possible to control the movement of the shutter blades with a single drive source for two-stage driving so that the shutter blades can simultaneously perform the functions of the shutter and the aperture. It is an object to make it possible to use a driving source for driving, thereby reducing the manufacturing cost of a digital camera.

In order to achieve the above object, the present invention provides an opening through which light passes; And, a drive source for generating a rotational power; And a drive pin physically connected to the drive source and rotated by the rotational force transmitted from the drive source; And, It has a long hole for guiding the drive pin, is supported by a rotating shaft, while rotating about the rotation axis by an angle limited in the opposite direction by the rotation force supplied from the drive pin to be guided along the long hole, A first shutter blade and a second shutter blade for adjusting light passing through the opening; and being supported by the driving pin and the rotating shaft to generate an elastic force in a direction of preventing rotation of the first and second shutter blades. Provided is a digital camera shutter device having an elastic member.

Meanwhile, the opening may be completely opened while the first shutter blade and the second shutter blade are rotated by a limited angle by a rotational force that rotates in one direction supplied from the driving pin. The opening may be completely closed while the first shutter blade and the second shutter blade rotate by a limited angle by a rotation force that rotates in the opposite direction to the one direction.

In addition, the rotational force is not supplied from the driving pin, the first and second shutter blades are supported by the elastic member to open only a part of the opening.

Meanwhile, each of the first and second shutter blades may have an introduction port having a smaller size than the opening.

In this case, the opening may be completely opened by the shutter blade while the first shutter blade and the second shutter blade are rotated by a limited angle by a rotational force that rotates in one direction supplied from the driving pin. Introduced portions formed in the first and second shutter blades correspond to each other by a rotational force that rotates in a direction opposite to the one direction supplied from the driving pin, and corresponding introduction portions correspond to the openings. Some of the openings may be covered.

In addition, the rotational force is not supplied from the driving pin, the first shutter blade and the second shutter blade may be supported by the elastic member to completely close the opening.

On the other hand, the driving source provided in the digital camera shutter device is a rotor and a current having a rotating portion formed of a permanent magnet having a plurality of magnetic poles, a driving arm fixedly extending from the rotating portion and a driving pin fixed to the end of the driving arm; And a stator having a supplied coil and a yoke wound on the coil and having a yoke formed at the end by a current flowing through the coil, wherein the polarity of the end of the yoke is changed according to the direction of the current flowing through the coil. The rotation direction of may be determined.

Hereinafter, a digital camera shutter apparatus according to the present invention will be described with reference to the drawings.

First, a digital camera shutter apparatus of the first embodiment according to the present invention will be described with reference to FIGS. 1 to 4 by way of example.

1 shows a lens barrel 10 that is part of a digital camera. As illustrated in FIG. 1, the lens barrel 10 includes an opening 20 through which light passes along an optical path L, which is a path through which light travels. In this opening 20, a plurality of lenses for refracting light passing through the opening 20 are disposed.

On the other hand, the lens barrel 10 is a filter (LPF, Low Pass Filter) 30 to remove the optical noise of the high frequency component of the light adjusted by the shutter blades (110, 120) to be described later through the opening 20 And an image pickup device 40 for generating an electrical signal according to the intensity of the light reached corresponding to the light filtered by the filter 30. The electrical signal generated by the imaging device 40 may be stored in a storage device provided in the digital camera and converted into an image in the display device, or may be transmitted to another electronic device for processing.

On the other hand, the lens barrel 10, the first shutter blades 110 and the second shutter blades rotated by a limited angle in order to control the amount of light and the exposure time of the light that passes through the opening 20, And a driving source 130 for supplying rotational force to the first and second shutter blades in order to rotate the first and second shutter blades 110 and 120 by a limited angle. A shutter device 100 is provided.

On the other hand, the structure of the drive source 130 is illustrated in Korean Patent Publication No. 2003-00921912. Based on this, the drive source will be briefly described. The drive source 130 includes a rotor 136 that rotates and a stator 131 that generates a magnetic force to rotate the rotor 136. At this time, the rotor 136 is a rotating part 137 formed of a permanent magnet having a plurality of magnetic poles, a driving arm 139 fixedly extended from the rotating part 137 and fixed to the end of the driving arm 139 A driving pin 138 is provided.

On the other hand, the stator 131 is preferably formed in a horseshoe shape, and any one of the ends 132a is provided with a yoke 132 wound by a coil 133 made of a conductive material through which a current passes.

In this case, the process of generating the rotational force by the drive source 130 will be briefly described. When a predetermined current flows in one direction to the coil 133 wound around the yoke 132 of the stator 131, N pole magnetic poles are generated at one end 132b of the yoke, and the yoke At the other end 132a of the S pole will be generated. At this time, the attraction and repulsive force generated by the correspondence of the N pole and the S pole between the rotary part 137 formed of the permanent magnet provided by the rotor 136 and the end of the yoke 132, the end of the yoke 132a, 132b) rotates the rotating part while pulling or pushing the outer circumference of the rotating part to generate a rotating force.

At this time, the rotating part 137 is rotated while the driving arm 139 which is fixed to the rotating part 137 and extended. At this time, as the driving arm 139 rotates as shown in FIG. 3, the driving pin 138 fixed to the driving arm 139 rotates. At this time, the driving pin 138 is guided by a driving pin guide part 140 formed on a shutter base (not shown) supporting the shutter blades 110 and 120 at the rear of the shutter blades 110 and 120 to limit the rotation angle. The driving pin 138 rotates between (a, b).

On the other hand, the drive source 130 described above is only one example of a drive source that can be used in the present invention, various drive sources such as a stepping motor may be used. Therefore, the present invention is not limited by the kind of the driving source.

On the other hand, the first shutter blades 110 and the second shutter blades 120 are preferably manufactured in a symmetrical shape with each other, the first shutter blades 110 and the second shutter blades 120 to the drive source ( Long holes 114 and 124 are provided to support and guide the driving pin 138 of the 130.

The first and second shutter blades 110 and 120 are supported by a rotation shaft 118 disposed on a shutter base (not shown). And, the long hole 114, 124 is When the driving pin is supported and the shutter blades 110 and 120 are supported by the rotation shaft 118, the shutter is transmitted when the rotational force due to the rotation of the driving pin 138 is transmitted to the long holes 114 and 124. Each of the vanes 110 and 120 is supported by the rotation shaft 118 disposed on the shutter base (not shown) to rotate in opposite directions.

On the other hand, the rotating shaft 118 is supported by the elastic member 116 to be described later. At this time, the rotating shaft 118 is not completely fixed to the elastic member 116, it is preferable to allow the movement in the longitudinal direction of the elastic member 116.

In addition, the shutter device 100 is supported by the driving pin 138 and is supported by the first shutter blades 110 and the second shutter blades 120 to support the first shutter blades 110 and the second shutter blades. It is provided with an elastic member 116 for generating an elastic force in the direction of preventing the rotation of the shutter blades 120.

In this case, when the driving pin 138 is guided along the long holes 114 and 124, the elastic member 116 is stretched or contracted in response to the movement of the driving pin 138. It is preferable to generate an elastic force in the direction of preventing the movement of the drive pin, while the movement of the drive pin 138 is blocked by the elastic member 116, the first shutter blades 110 and the first by the elastic member Rotation of the shutter blades 120 is prevented.

In this case, in order to generate such elastic force, the elastic member 116 may be formed of various springs, etc., which are elastic materials, and more preferably, a torsion spring.

Hereinafter, the rotation of the shutter blades 110 and 120 and the opening degree of the opening 20 will be described with reference to the movement of the shutter blades and the elastic force of the elastic member.

As shown in FIG. 3, in a state in which rotation force is not supplied from the driving source 130, the elastic member 116 is supported by the driving pin 138 and the rotation shaft 118 so as to support the first shutter blade 110. And limiting the movement of the second shutter blades 120 in the no-load state (equilibrium state).

At this time, in the unloaded state, the first and second shutter blades 110 and 120 form an introduction port 112 covering only a part of the opening 20. In this case, since the size of the introduction port 112 is smaller than that of the opening 20, the amount of light traveling through the opening 20 is limited by the introduction port 112.

Therefore, when the elastic member 116 is maintained in the no-load state, the opening portion 20 is partially covered by the introduction port 112 so that the amount of light is adjusted, so that the shutter blades 110 and 120 stop. Instead, the depth of the shutter blades 110 and 120 may be adjusted when photographing a subject.

Meanwhile, as shown in FIG. 4, when the driving arm 139 of the driving source 130 rotates in one direction b, the driving pin 138 fixed to the driving arm 139 is the driving pin. It is guided by the guiding part 140 to transmit the rotational force to the long holes (114, 124), and the first shutter blade 110 and the second shutter by the angle limited by the drive pin guiding part 140 Rotate the blade 120. The first shutter blades 110 and the second shutter blades 120 are opened by a predetermined angle by the rotation, and the opening portion 20 is completely opened.

In this case, since the elastic member 116 is supported by the rotation shaft 118 and the driving pin 138, the driving pin 138 is guided along the long holes 114 and 124 to rotate the elastic member 116. 116 is contracted to generate an elastic force in the driving pin 138, and this elastic force acts in a direction of preventing rotation of the first and second shutter blades 110 and 120. At this time, the driving source 130 generates a rotational force to overcome the elastic force to rotate the first shutter blades 110 and the second shutter blades 120 by a limited angle.

As described above, when the opening 20 is completely opened by rotating the shutter blades 110 and 120 by a predetermined angle, light traveling through the opening 20 passes through the shutter blades ( 110, 120, so that the amount of light passing through is maximized.

Meanwhile, as shown in FIG. 5, when the driving arm 139 of the driving source 130 rotates in another direction (a), the driving pin 138 fixed to the driving arm is driven by the driving pin guiding part ( The first shutter blade 110 and the second shutter blade 120 are rotated by a limited angle in the opposite direction as when the opening is completely opened by guiding by 140 to transmit rotational force to the long holes 114 and 124. Let's do it. In addition, the opening 20 is completely closed by the first and second shutter blades 110 and 120 by the rotation.

In this case, since the elastic member 116 is supported by the rotation shaft 118 and the driving pin 138, the driving pin 138 is guided along the driving pin guiding part 140 and rotates. The elastic member 116 is tensioned to generate an elastic force, and the driving source 130 generates a rotational force that overcomes the elastic force, thereby allowing the first and second shutter blades 110 and 120 to rotate in the above-described directions. Rotate by a limited angle.

Meanwhile, as described above, the first shutter blade 110 and the second shutter blade 120 rotate with the rotational force supplied from the driving source to completely open or completely close the opening 20. On the other hand, by controlling the rotational speed of the shutter blades (110, 120) by adjusting the rotational speed of the drive source it is possible to adjust the time that the image pickup device 40 is exposed to light, and thus, the shutter blades (110, 120) It becomes possible to perform a function as a shutter.

Meanwhile, as described above, when the rotational force from the driving source 130 is not supplied to the shutter blades 110 and 120, the shutter blades cover only a part of the opening 20, thereby limiting the amount of light. . Accordingly, the shutter blades 110 and 120 may adjust the amount of light passing through the opening depending on whether the opening of the opening 20 starts at the full opening or the partial opening at the time of closing the opening 20. The shutter blades function as an aperture, and thus the depth of the photographed image can be adjusted by adjusting the exposure amount of light.

On the other hand, the driving of the shutter blades as described above, while performing only two-stage movement to rotate in one direction or the opposite direction to the one direction, while the shutter blades (110, 120) and the driving pin 138 is the elastic member 116 It is supported by it can perform a three-stage drive of the full opening of the opening 20, fully closed, partially open. Therefore, since the shutter blades can simultaneously perform the functions of the shutter and the iris using only two driving stages, the cost of the driving source can be reduced.

In addition, since a relatively small drive source can be used, it can contribute to the miniaturization and thinning of the digital camera, and since a simple drive source is used, it is possible to reduce the residual trouble of the digital camera.

Hereinafter, a shutter apparatus 200 of a digital camera according to a second embodiment of the present invention will be described with reference to FIGS. 6 to 8 by way of example, focusing on different matters from the first embodiment according to the present invention.

The shutter device 200 of the digital camera according to the second embodiment of the present invention differs from that of the first embodiment according to the present invention in that the first shutter blade 210 and the second shutter of the shutter device 200 are provided. Each of the vanes 220 is provided with introduction portions 212 and 222 having smaller sizes than the openings 20.

The rotation of the shutter blades 210 and 220 and the opening degree of the opening 20 according to the second embodiment of the present invention will be described with reference to the movement of the shutter blades 210 and 220 and the elastic force of the elastic member 116. .

As shown in FIG. 6, in the state where the rotational force is not supplied from the driving source 130, the elastic member 116 is supported by the driving pin 138 and the rotation shaft 118 so as not to generate an elastic force. State (equilibrium).

At this time, in this unloaded state, the first shutter blade 210 and the second shutter blade 220 completely close the opening 20 to completely block light traveling through the opening 20.

Meanwhile, as shown in FIG. 7, when the driving arm 139 of the driving source 130 rotates in one direction (a), the driving pin 138 fixed to the driving arm 139 is the driving pin. It is guided to the guiding part 240 to transmit the rotational force to the long holes 214, 224, by the rotational force to rotate the first shutter blades 110 and the second shutter blades 120 by a limited angle.

In this case, the introduction spheres 212 and 222 formed in the first and second shutter blades 110 and 120 correspond to each other, and the introduction spheres 212 and 222 corresponding to each other correspond to the opening portion 20 and the opening portion. The introduction portions smaller in size cover a part of the opening 20.

In this case, as in the first embodiment of the present invention, since the elastic member 116 is supported by the rotation shaft 218 and the driving pin 138, the driving pin 138 is the driving pin guiding part. The elastic member 116 is tensioned and rotated along the 240 to generate an elastic force in a direction opposite to the direction in which the driving pin 138 rotates. The elastic force is the first shutter blade 210 and The second shutter blade 220 acts in a direction of preventing rotation.

At this time, as in the first embodiment according to the present invention, the drive source 130 generates a rotational force to overcome the elastic force to the first shutter blades 210 and the second shutter blades 220 by a limited angle Rotate

On the other hand, as described above, when the introduction openings 212, 222 correspond to the openings 20 to cover a part of the openings 20 by rotating by the predetermined angle by the shutter blades (210, 220), the openings Since only a part of the light passing through 20 reaches the imaging device 40 by passing through the introduction port, only the shutter blades 210 and 220 adjust the amount of light to adjust the depth of the captured image. Can play a role.

Meanwhile, as shown in FIG. 8, when the driving arm 139 of the driving source 130 rotates in the other direction a, the driving pin 138 fixed to the driving arm 139 is The driving pin is guided to the guiding part 140 to transmit rotational force to the long holes 214 and 224. The first and second shutter blades 210 and 220 rotate about the rotation shaft 118 by the rotational force. In this case, the first shutter blade 210 and the second shutter blade 220 are rotated and opened by a limited angle in the opposite direction as when the opening portion 20 corresponds to the introduction spheres 212 and 222. The opening 20 is completely opened by the first shutter blade 210 and the second shutter blade 220. The amount of light passing through the opening is maximized by the movement of the shutter blades 210 and 220.

Meanwhile, since the elastic member 116 is supported by the rotation shaft 118 and the driving pin 138, the driving pin 138 is guided along the long hole 214 to rotate the elastic member 116. The member 116 is stretched again to generate an elastic force, and the driving source 130 generates a rotational force that overcomes the elastic force, thereby describing the first and second shutter blades 210 and 220. Rotate by a limited angle in the direction.

On the other hand, when the rotational force is not supplied to the shutter blades 210 and 220 from the driving source 130, the shutter blades 210 and 220 are supported by the elastic member 116 to completely close the opening 20. In this case, the rotational force is not applied to the shutter blades 210 and 220 in the state in which the opening is completely opened. Therefore, the shutter blades 210 and 220 may completely cover the opening 20 in this state. Meanwhile, the small openings 212 and 222 may correspond to the openings 20 by moving the shutter blades 210 and 220. Therefore, the amount of light is adjusted according to the movement of the shutter blades 210 and 220. In addition, since the rotational speed of the shutter blades can be controlled according to the magnitude of the driving source, the shutter blades can simultaneously function as an aperture and a shutter.

In addition, the driving source 130 can control all the movements of the shutter blades (210, 220) in a two-stage drive to supply a rotational force through the rotation in one direction or the other direction, as in the first embodiment of the present invention, The above-mentioned effects, such as cost reduction, thinning of a digital camera, and reduction of trouble, can all be achieved.

The present invention achieves the following effects including the effects described above.

First, the shutter blades perform the functions of the shutter and the aperture at the same time, thereby alleviating the complexity of the shutter device and further reducing the cost.

Secondly, it is possible to control the movement of the shutter blades with a single drive source for two-stage driving so that the shutter blades can simultaneously perform the functions of the shutter and the aperture. It is possible to use a driving source to drive, thereby reducing the manufacturing cost of the digital camera.

Thirdly, the digital camera shutter device is simplified to minimize the trouble and help reduce the thickness of the digital camera.                     

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (9)

Opening through which light passes; A drive source for generating a rotational force; A driving pin that is physically connected to the drive source and rotates by a rotational force transmitted from the drive source; It has a long hole for guiding the drive pin, is supported by a rotating shaft, while rotating about the rotation axis by an angle limited in the opposite direction by the rotation force supplied from the drive pin to be guided along the long hole, A first shutter blade and a second shutter blade for adjusting light passing through the opening; And And an elastic member which is supported by the driving pin and the rotating shaft to generate an elastic force in a direction of preventing rotation of the first and second shutter blades. The method of claim 1, And the opening is completely opened while the first and second shutter blades rotate by a limited angle by a rotational force that rotates in one direction supplied from the driving pin. The method of claim 2, The first shutter blade and the second shutter blade is rotated by a limited angle by a rotational force to rotate in a direction opposite to the one direction supplied from the drive pin, the digital camera shutter device, characterized in that for completely closing. The method of claim 1, The rotation force is not supplied from the drive pin, the first shutter blade and the second shutter blade is supported by the elastic member, characterized in that the digital camera shutter device to open only a part of the opening. The method of claim 1, Each of the first shutter blade and the second shutter blade has an introduction opening having a smaller size than the opening. The method of claim 5, The first shutter blade and the second shutter blade is rotated by a limited angle by the rotational force to rotate in one direction supplied from the drive pin, the digital camera shutter, characterized in that the opening is completely opened by the shutter blades. Device. The method of claim 6, Introduced portions formed in the first and second shutter blades correspond to each other by a rotational force that rotates in a direction opposite to the one direction supplied from the driving pin, and corresponding introduction portions correspond to the openings. A digital camera shutter device, characterized by covering part of the opening. The method of claim 5, The rotation force is not supplied from the driving pin, the first shutter blade and the second shutter blade is supported by the elastic member, characterized in that the digital camera shutter device to completely close the opening. The method of claim 1, The drive source is A rotor having a rotating part formed of a permanent magnet having a plurality of magnetic poles, a driving arm fixedly extending from the rotating part, and a driving pin fixed to an end of the driving arm; And a stator having a coil supplied with a current, and a yoke wound on the coil and having a yoke formed at the end by a current flowing through the coil, And a direction of rotation of the rotor is determined by changing the polarity of the end of the yoke according to the direction of the current flowing through the coil.

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