KR20060118788A - A structure of shutter and iris for mobile-phone - Google Patents

Abstract

A structure of a shutter and an iris for a mobile phone is provided to cut down expenses by adjusting the shutter and the iris with a single actuator, and to precisely take a picture of a subject by regulating the position of the iris according to luminosity. A first shutter and a second shutter(120,130) are installed in an upper part of a base plate(12) and moved linearly and conversely. A fitting projection(20a) of an arm lever(20) is fitted to elongated holes(122,132) of the first and second shutters. A rotor shaft(28a) is combined with a lower part of the base plate to turn the arm lever clockwise or counterclockwise. A bobbin is mounted in an inner periphery of a ring yoke(24), and a 6-pole permanent magnet is turned and inserted to the bobbin. The 6-pole permanent magnet is rotated and inserted to a first drive coil and a second drive coil. The rotor shaft is pressed and fitted to the middle of the permanent magnet and combined with an end of the arm lever.

Description

A structure of shutter and IRIS for Mobile-phone

1 is a perspective view schematically showing a lens barrel of a camcorder to which an aperture is applied according to the prior art;

2 is an exploded perspective view of the aperture shown in FIG. 1;

3A is a plan sectional view showing a conventional driving unit;

Figure 3b is a half sectional view showing a conventional drive unit,

4A and 4B are plan views showing a state in which a shutter is driven by a conventional driving unit;

5 is a perspective view showing a shutter and aperture structure for a mobile phone according to the present invention;

Figure 6a is a plan sectional view showing a drive unit according to an embodiment of the present invention,

Figure 6b is a half sectional view showing a drive unit according to an embodiment of the present invention,

And,

7A, 7B, and 7C are diagrams illustrating operations of a shutter and aperture structure for a mobile phone according to an embodiment of the present invention.

* Description of symbols on the main parts of the drawings *

26: bobbin

30a: first drive coil

30b: second drive coil

38: 6-pole magnetized permanent magnet

The present invention relates to a shutter structure of a mobile phone, and more particularly, to a shutter structure for a mobile phone capable of performing a closing operation of a shutter for adjusting an amount of light incident on an image pickup lens in two steps using a magnetic force.

In general, in a digital camera phone or a digital camcorder, a camera function is a device for converting incident light that reaches an image pickup surface such as a solid state image pickup device through a lens into an electric video signal. Such a device is realized by adjusting the amount of incident light reaching the imaging surface generally by two or more steps between the lens and the lens on which the zoom lens and the focus lens are mounted, or by an aperture provided in front of the fixed focus lens.

1 to 3A and 3B illustrate an aperture structure applied to a conventional camcorder, wherein an aperture 10 is installed between the lens barrel 2 and the barrel master 4, and the aperture 10 is disposed on the bottom surface. The first and second shutters 14 and 16 and the first and second shutters 14 linearly moving in opposite directions from the upper surface of the base plate 12 and the base plate 12 provided with the light projection hole 12a. It is provided as a driving unit for providing a driving force to the (16).

A plurality of guide protrusions 12b protrude from both sides of the base plate 12, and the guide holes 14a and 16a formed on both sides of the first and second shutters 14 and 16 slide on the guide protrusions 12b. A cover 18 having a pair of circular arcs 18a is attached to the base plate 12 to prevent separation of the first and second shutters 14 and 16.

An arm lever 20 is rotatably mounted on an upper surface of the base plate 12, and long holes 14b and 16b provided at both ends of the first and second shutters 14 and 16 are provided at both ends of the arm lever 20. The fitting projections 20a to be fitted protrude from each other, and a stopper 22 for controlling the rotation of the second shutter 16 protrudes from one end of the base plate 12.

The driving unit is provided with a cylindrical ring yoke 24 coupled to the base plate 12, a bobbin 26 attached to an inner circumferential surface thereof, and a permanent magnet 28 rotatably inserted into the bobbin 26. The drive coil 30 is wound around the bobbin 26, and the permanent magnet 28 is magnetized in anisotropy (N, S).

A permanent magnet 28 is installed on the inner circumferential surface of the bobbin 26, a rotor shaft 28a having one end coupled to the arm lever 20 is press-fitted to the center of the permanent magnet 28, and an arm is inserted into the rotor shaft 28a. The lever 20 is assembled.

In the conventional diaphragm structure configured as described above, the guide holes 14a and 16a of the first and second shutters 14 and 16 are fitted to the guide protrusions 12b of the base plate 12, and the first and the first The cover 18 is coupled to the upper portion of the base plate 12 in a state in which the fitting protrusions 20a of the arm lever 20 are respectively fitted into the long holes 14b and 16b provided at both ends of the shutters 14 and 16. At this time, a portion of the fitting protrusion 20a protrudes into the arc hole 18a formed in the cover 18.

Subsequently, when the engagement of the first and second shutters 14 and 16 is performed in the state where the coupling is completed as shown in FIG. 4A, the bobbin ( When power is applied to the drive coil 30 wound on the 26, the permanent magnet 28 rotates counterclockwise by the magnetic field generated by the drive coil 30, and thus the rotor shaft 28a press-fitted therein rotates. While rotating the arm lever 20 as shown in Figure 4b.

In addition, the first and second shutters 14 and 916 fitted to the fitting protrusions 20a by the rotation of the arm lever 20 linearly move in opposite directions to each other, thereby performing the opening operation to light the base plate 12. As the projection hole 12a is opened and closed, incident light passing through the zoom lens reaches the imaging surface. At this time, one end of the arm lever 20 comes into contact with one surface of the stopper 22 protruding from the base plate 12 to stop the opening operation of the first and second shutters 14 and 16 and the rotor shaft 28a. The torsion spring 36 interposed at one end maintains a compressed state.

Then, when the power applied to the drive coil 30 is cut off, the first and second shutters 14 and 16 which perform the opening operation while gradually reducing the current by the damping coil 32 are compressed torsion springs. By the restoring force of 36, the closing operation is performed while sliding along the guide protrusion 12a of the base plate 12.

However, using the aperture function as described above, the shutter function is always installed to enable clear picture quality without distinguishing between dark and bright places and to maintain high quality pictures while maintaining such a state. Three actuators, one for brightness control and one for shutter function.

The present invention is to solve the above problems, to provide a shutter and aperture structure for a mobile phone having two functions with one actuator, that is, the aperture function and the shutter function.

An arm lever for driving the first and second shutters and the first and second shutters to linearly move in the opposite direction from the base plate and the upper surface of the base plate according to the present invention for achieving the above object; The shutter and aperture structure for a mobile phone having a rotor shaft for transmitting a driving force to the arm lever and a ring yoke in which a multi-pole magnetized permanent magnet is inserted to provide a driving force to the rotor shaft are provided on the inner surface of the ring yoke. A bobbin with first and second drive coils for driving the shutter is attached to the bobbin, and the bobbin performs opening and closing operations of the first and second shutters in a plurality of steps by magnetic force with the multi-pole magnetized permanent magnet. Characterized in that the magnetic force generating portion is provided to enable.

The base plate rotates an arm lever for driving the first and second shutters in opposite directions, a multipole magnetized permanent magnet for driving the arm lever in multiple stages, and the multipole magnetized permanent magnet at a predetermined angle. The first drive coil for driving in motion is formed perpendicular to the poles of the multi-magnetized permanent magnet and the neighboring poles, and the second drive coil is located between the poles and the poles of the poles of the multi-pole magnetized permanent magnet. When the current is alternately supplied to the first and second drive coils to alternately supply current to the poles, the multi-pole magnetized permanent magnet is driven at a predetermined angle to open and close the first and second shutters in a plurality of steps. To do this.

In addition, a mobile phone having a base plate and first and second shutters linearly moving in opposite directions on the upper surface of the base plate and a ring yoke with permanent magnets inserted therein to provide driving force to the first and second shutters. The shutter and the diaphragm structure includes a rotor shaft built up in the multi-pole magnetized permanent magnet, an arm lever for providing a driving force to the first and second shutters by rotation of the rotor shaft, and attached to an inner circumferential surface of the ring yoke and rotating the rotor shaft. The first and second drive coils and the bobbin for driving comprise a magnetic force generating unit for performing the opening and closing operation of the first and second shutters in a plurality of stages by a magnetic force with the permanent magnets. By the magnetic force of the multi-pole magnetized permanent magnet and the first and second drive coils to open and close the arm lever in a plurality of steps It can also be configured.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

The present invention allows the rotational movement by the first and second drive coils wound in the vertical direction along the bobbin, and alternately supply current to the first and second drive coils to rotate the rotation by a predetermined angle. Is achieved.

Hereinafter, a preferred embodiment of a mobile phone shutter and aperture structure according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 5 is a view showing the aperture structure according to the present invention, Figure 6a is a plan sectional view showing a drive unit of the present invention and Figure 6b is a half sectional view showing a drive unit of the present invention.

As shown, the first and second shutters 120 and 130 are mounted on the upper surface of the base plate 12 so as to be linearly movable in opposite directions, and both ends of the first and second shutters 120 and 130 are provided. The fitting protrusions 20a of the arm levers 20 are fitted in the long holes 122 and 132 formed in the rotor holes, and the rotors are rotated in the lower portion of the base plate 12 so as to rotate the arm levers 20 clockwise or counterclockwise. The shaft 28a is engaged.

The inner surface of the ring yoke 24 is provided with a bobbin 26 attached to its inner circumferential surface and a six-pole magnetized permanent magnet 28 rotatably inserted into the bobbin 26, and the bobbin 26 has a first drive. The permanent magnet 28 magnetized into six poles is rotatably inserted into the coil 30a and the second drive coil 30b, and a rotor having one end coupled to the arm lever 20 in the center of the permanent magnet 28. The shaft 28a is press fit.

Figure 5 is a view showing the aperture structure according to the present invention, Figure 6a is a plan sectional view showing a drive unit of the present invention and Figure 6b is a half sectional view showing a drive unit of the present invention.

As shown, the first and second shutters 120 and 130 are mounted on the upper surface of the base plate 12 so as to be linearly movable in opposite directions, and at both ends of the first and second shutters 120 and 130. The fitting projections 20a of the arm levers 20 are fitted in the formed long holes 122 and 132, respectively, and the ring yoke is rotated in the lower portion of the base plate 12 so as to rotate the arm levers 20 clockwise or counterclockwise. (24) are combined.

When described in detail with reference to Figure 7a, 7b and 7c for the mobile phone shutter and the aperture structure according to the present invention configured as described above.

Figures 7a, 7b and 7c is a view showing the operation of the shutter and aperture structure for a mobile phone according to the present invention.

FIG. 7A shows the positions of the stops in the closed operation state. In the present invention, the positions when the current is not applied to the coils are configured in the closed operation state.

A process of moving from the bright place to the first aperture position (iris position in the bright place) will be described with reference to FIG. 7B.

When the DC power is applied to the first drive coil 30a wound on the bobbin 26 of the ring yoke 24 to reach the image pickup surface in the closed state as described above, The rotor shaft 28a rotates while the six-pole magnetized permanent magnet 28 rotates counterclockwise to rotate the arm lever 20 coupled to one end thereof counterclockwise. In addition, when the rotation is in the state of FIG. 7B, the forces of the first drive coil and the six-pole magnetized permanent magnet are in equilibrium, and thus stop rotation.

Then, the first and second shutters 120 and 130 to which the fitting protrusion 20a of the arm lever 20 is fitted are linearly moved in opposite directions from the upper surface of the base plate 12 to each other. The opening operation is started at the position to reach the incident light onto the imaging surface.

In the shutter function, when DC power is applied to the second drive coil 30b, the rotor shaft 28a is rotated and coupled to one end thereof while the six-pole magnetized permanent magnet 28 rotates clockwise. The arm lever 20 is rotated clockwise. In addition, the rotation of the second drive coil (30b) and the six-pole magnetized permanent magnet is in equilibrium when the state (closed position) of FIG.

Then, the first and second shutters 120 and 130 in which the fitting protrusions 20a of the arm lever 20 are fitted are linearly moved in opposite directions from the upper surface of the base plate 12, as shown in FIG. 7A. The closing operation is performed in the closing operation state to block the incident light from reaching the imaging surface.

Hereinafter, referring to FIG. 7C, a process of moving to the second aperture position (aperture position in the dark) will be described. A DC voltage for operating the second drive coil 30b from the first aperture position in a closed position. When the DC voltage is applied inversely, the six-pole magnetized permanent magnet 28 rotates counterclockwise while the rotor shaft 28a rotates to counterclockwise the arm lever 20 coupled to one end thereof. Rotate In addition, the rotation of the first drive coil (30b) and the six-pole magnetized permanent magnet is in equilibrium when the state of Figure 7c is no longer rotated to stop.

Then, the first and second shutters 120 and 130 in which the fitting protrusions 20a of the arm lever 20 are fitted are linearly moved in opposite directions from the upper surface of the base plate 12, as shown in FIG. 7C. The opening operation is started at the second aperture position to reach the incident surface to the imaging surface.

In the shut-off function, when the DC power is applied to the first aperture coil position in the closed state with the first drive coil 30b, the six-pole magnetized permanent magnet 28 rotates clockwise while The rotor shaft 28a rotates to rotate the arm lever 20 coupled to one end thereof in a clockwise direction. In addition, the rotation of the second drive coil (30b) and the six-pole magnetized permanent magnet in equilibrium when the state (closed position) of FIG. At this time, when the DC power is applied to the second drive coil again to operate in the same manner as the shutter function in the first aperture position, the closing operation is performed in the closing operation state of FIG. 7A to block incident light from reaching the imaging surface.

In addition, the embodiment of the present invention has been described as having the six-pole magnetized permanent magnet, but when the magnet of the permanent magnet magnetized to 8 poles, 10 poles, or more multi-poles, more plural stages of aperture positions are possible. .

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and variations belong to the appended claims.

As described above, according to the shutter and aperture structure for a mobile phone according to the present invention, since one actuator is possible, cost reduction and miniaturization are possible.

In addition, by adjusting the aperture position in a bright place and a dark place it is possible to capture the subject more precisely.

Claims (4)

In the diaphragm structure provided with the base plate and the upper surface of the base plate, the first and second shutters linearly moving in opposite directions to each other, and a ring yoke with permanent magnets inserted therein to provide driving force to the first and second shutters. In A bobbin to which the first and second drive coils are attached to the ring yoke inner circumferential surface and the bobbin is attached to the bobbin by magnetic force with the multi-pole magnetized permanent magnet. The shutter and the iris structure, characterized in that the magnetic force generating portion is provided to perform the opening and closing operation of the second shutter in a plurality of stages. The shutter and aperture structure according to claim 1, wherein the multi-pole magnetized permanent magnet is magnetized into six poles. The shutter and aperture structure according to claim 1, wherein the multi-pole magnetized permanent magnet is magnetized into 8 poles, 10 poles or more poles. According to claim 1, wherein one drive coil of the permanent magnet of the multi-pole magnetized position of the first and second drive coil is formed perpendicular to the pole adjacent to the pole, and another drive coil is the multi-pole magnetized permanent magnet Shutter and aperture structure, characterized in that formed vertically between the pole and the pole between the pole and the pole.

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