KR20070050534A - Shutters for camera phones mounted on solenoid-driven annular permanent magnets - Google Patents

Abstract

The present invention drives the external solenoid to alternately generate magnetic poles and magnetic fields of the electromagnet to induce rotational movement in the annular permanent magnet, and the solenoid for opening and closing the shutter sector directly connected to the permanent magnet in accordance with the rotational movement of the permanent magnet A camera phone shutter mounted on a drive annular permanent magnet, the camera phone shutter comprising: an annular permanent magnet having a plurality of projections formed thereon; A pair of solenoids provided to face the annular permanent magnet, the pair of solenoids rotating the annular permanent magnet in a predetermined direction; A light passing hole for providing light to the lens group in the barrel device, a groove formed to mount the pair of solenoids, and a stator having a stopper formed at a predetermined position; A plurality of irises having first and second shaft holes formed therein, the fixed protrusions of the annular permanent magnet being coupled to the first shaft holes, and controlling the amount of light incident to the light passing holes; And a protrusion coupled to the second shaft hole, the cover housing having a light passing hole for providing the light.

Camera phone shutter, external solenoid, toroidal, permanent magnet, shutter sector

Description

Shutter for camera phone attached on solenoid-driven concentric permanent magnet}

1 is a view conceptually showing a shutter for a camera phone mounted on a solenoid driven toroidal permanent magnet to which the present invention is applied;

FIG. 2 is a view illustrating a driving principle in which an annular permanent magnet rotates in one direction when a current is supplied to the solenoid of FIG. 1;

3 is a view showing an open state of the shutter when the annular permanent magnet is rotated forward as shown in FIG.

4 is a view illustrating a closed state of the shutter when the annular permanent magnet of FIG. 2 rotates in the opposite direction;

5 is an exploded perspective view of a shutter for a camera phone mounted on a solenoid drive annular permanent magnet according to the present invention.

*** Explanation of symbols on main parts of drawing ***

10: pair of solenoids

12: shutter

14: annular permanent magnet (rotor)

16: current supply unit

18: control unit

20: Stator

22: home

24: stopper

26: Bolt

28: first shaft ball

30: second shaft ball

32: cover housing

34: turning

36, 38: light passing through

The present invention relates to a shutter for a camera phone mounted on a solenoid driven annular permanent magnet.

In particular, by driving an external solenoid to generate magnetic poles and magnetic fields alternately to induce rotational movement in the annular permanent magnet, and the solenoid drive to open and close the shutter sector directly connected to the permanent magnet in accordance with the rotational movement of the permanent magnet A shutter for a camera phone mounted on an annular permanent magnet.

In general, the camera applying the electronic shutter adjusts the exposure amount reaching the photosensitive surface of the image sensor or the film by controlling the aperture size of the aperture and the opening / closing speed of the shutter according to the brightness of the subject.

The technology of a camera to which an electronic shutter for a camera having such a function is applied is described in US Pat. No. 4,918,480 (1998.10.27), US Pat. No. 4,425,425 (1985.6.20), US Pat. No. 5111230 (1990.8.28) And Japanese Patent Laid-Open No. 61-9632, Korean Patent Application No. 1997-0038300, and Korean Patent No. 061600.

Such a conventional shutter device for a camera adopts a structure for driving the shutter by receiving power through a mechanism such as a lever, a gear, and the like coupled to a driving mechanism such as a step motor or a solenoid, and thus has a complicated structure and an excessive number of parts. There is this.

Meanwhile, mobile phones have recently been constrained by space for dedicated components as they integrate functions of various digital devices. In order to minimize the size of the module, a camera phone released in Japan employs stepwise optical zoom using one driving mechanism instead of a plurality of driving mechanisms.

This situation is more serious in modules of 300 million pixels or more, and it is not easy to adopt a conventional digital camera shutter device having a complicated structure and a bulky volume. In other words, if the conventional method is used as it is, the driving mechanisms for driving the barrel and the optical zoom driving for auto focus and the driving mechanism for driving the shutter are separately required, thereby increasing the volume of the entire module.

The present invention has been made to overcome the above problems, the object of the present invention is to drive the external solenoid to generate the magnetic poles and magnetic fields of the electromagnet alternately to induce rotational movement in the annular permanent magnet, the permanent magnet The present invention provides a shutter for a camera phone mounted on a solenoid driven annular permanent magnet for opening and closing a shutter sector directly connected to a permanent magnet according to a rotational movement.

An embodiment of the present invention proposed to solve the above technical problem, the shutter for the camera phone, the annular permanent magnet is formed with a plurality of projections; A pair of solenoids provided to face the annular permanent magnet and rotating the annular permanent magnet in a predetermined direction; A light passing hole for providing light to the lens group in the barrel device, a groove formed to mount the pair of solenoids, and a stator having a stopper formed at a predetermined position; A plurality of irises having first and second shaft holes formed therein, the fixed protrusions of the annular permanent magnet being coupled to the first shaft holes, and controlling the amount of light incident to the light passing holes; And a protrusion coupled to the second shaft hole, the cover housing having a light passing hole for providing the light.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation and preferred embodiment of the shutter for the camera phone mounted on the solenoid drive ring-shaped permanent magnet.

1 is a diagram conceptually showing a shutter for a camera phone mounted on a solenoid driven toroidal permanent magnet to which the present invention is applied.

As shown in FIG. 1, in the shutter for a camera phone, an annular permanent magnet 14 in which a plurality of protrusions 26 are formed is provided so as to face the annular permanent magnet 14. A pair of solenoids 10 for rotating the annular permanent magnet 14 in a predetermined direction, a light passing hole 38 for providing light to the lens group in the barrel device, and the pair of solenoids 10 may be mounted. The stator 20 and the first and second shaft holes 28 and 30 in which the stopper 24 is formed at a predetermined position and the groove 22 formed so as to be formed therein are formed. The projections 26 of the annular permanent magnet 14 are coupled, the plurality of shutters 12 for controlling the amount of light incident to the light passing hole 40, and the projections coupled to the second shaft hole 30. 34 is formed, the cover housing 32 is formed with a light passing hole 36 for providing the light It is composed.

The annular permanent magnet 14 simultaneously performs the function of a rotor.

The number of protrusions 26 formed in the annular permanent magnet 14 corresponds to the number of sectors of the shutter 12.

The pair of solenoids 10 are provided at a position slightly lower than an intermediate position of the annular permanent magnet 14. The reason is that if the solenoid 10 is located exactly in the middle of the annular permanent magnet 14, the magnetic force by the operation of the solenoid 10 is precisely balanced so that there is no actual net torque in the vertical direction. This is because (10) cannot be rotated.

Then, the left magnetic pole (N pole) of the annular permanent magnet 14 is pushed clockwise and the right magnetic pole (S pole) is pulled clockwise.

The protrusion 26 provided on the annular permanent magnet 14 is a bolt.

The shutter for the camera phone further includes a control unit 18 for controlling the output size of the current, and a current supply unit 16 for supplying current to the solenoid under the control of the control unit 18.

Referring to the operation of the shutter for the camera phone mounted on the solenoid drive ring-shaped permanent magnet configured as described above are as follows.

FIG. 2 is a view illustrating a driving principle in which the toroidal permanent magnet rotates in one direction when a current is supplied to the solenoid of FIG. 1, and FIG. 3 is a view of the shutter when the toroidal permanent magnet is rotated forward as shown in FIG. 2. Figure 4 is a view showing the open state, Figure 4 is a view showing a closed state of the shutter when the annular permanent magnet of Figure 2 rotates in the opposite direction, Figure 5 is mounted on a solenoid drive annular permanent magnet according to the present invention Perspective view of a shutter for a conventional camera phone.

First, as illustrated in FIGS. 2 to 5, the solenoid 10 is seated in the groove 22 of the stator 20, and the stator 20 is spaced apart from the solenoid 10 at a predetermined interval. An annular permanent magnet 14 is mounted on the upper portion.

In addition, holes 28 formed in the plurality of shutter sectors 12 are inserted into the bolts 26 of the annular permanent magnet 14, and the shutter sector 12 is seated and coupled to the upper part of the annular permanent magnet 14. . The nut 40 is coupled to the bolt 26 protruding out of the hole 28 so that the shutter sector 12 is fixed to the upper portion of the annular permanent magnet 14.

In addition, the elliptical long hole 30 formed in the shutter sector 12 is coupled to the projection 34 provided at the lower portion of the cover housing 32 so that the cover housing 32 is coupled to the stator 20.

The current supply unit 16 is connected to the solenoid 10 of the shutter for the camera phone mounted on the solenoid driving annular permanent magnet assembled as described above, and the pair of solenoids 10 is supplied with the current supply unit 16. By acting as an electromagnet.

That is, the pair of solenoids 10 acts as an electromagnet that alternately generates magnetic poles and magnetic fields. According to the magnetic pole and the magnetic field of the solenoid 10, the annular permanent magnet 14 is rotated forward or reverse rotation, the shutter sector 12 directly coupled to the annular permanent magnet 14 is opened or It is closed.

Since the magnitude of the magnetic pole and the magnetic field of the solenoid 10 depends on the magnitude and the direction of the current supplied from the current supply unit 16, the current supply unit 16 to adjust the magnitude of the magnetic pole and the magnetic field of the solenoid 10 What is necessary is just to change the magnitude | size and direction of the electric current supplied to the solenoid 10 from a.

As described above, the shutter sector 12 connected to the annular permanent magnet 14 may be rotated and restored according to the magnitude of the magnetic pole and the magnetic field of the solenoid 10. That is, when a current is supplied to the solenoid 10, a rotational motion is induced in the annular permanent magnet 14, and the shutter sector 12 directly connected to the annular permanent magnet 14 is the annular permanent magnet. According to the rotational movement of (14), it is opened to a certain position. On the other hand, when the current supplied to the solenoid 10 is cut off, the annular permanent magnet 14 is restored to its original position and the shutter sector 12 is also returned to its original state and closed. At this time, the stopper 24 enables the home return without overshooting in order to control the correct home position at the return.

At this time, by providing the micro control circuit (micro control circuit) to finely and precisely control the current supply unit 16, it is possible to finely and precisely control the shutter (12).

The present invention having the configuration and operation and the preferred embodiment as described above to generate the magnetic pole and the magnetic field of the electromagnet by alternately driving the external solenoid to induce rotational movement in the annular permanent magnet, permanent according to the rotational movement of the permanent magnet The shutter sector directly connected to the magnet can be opened and closed to achieve miniaturization of the shutter drive mechanism.

In addition, the present invention has the effect of simplifying the structure of the mechanism by connecting the shutter drive source and the shutter directly.

In addition, the present invention has the effect of precisely controlling the opening and closing operation and thrust of the shutter.

Claims (4)

In the shutter for camera phones, An annular permanent magnet in which a plurality of protrusions are formed; A pair of solenoids provided to face the annular permanent magnet and rotating the annular permanent magnet in a predetermined direction; A light passing hole for providing light to the lens group in the barrel device, a groove formed to mount the pair of solenoids, and a stator having a stopper formed at a predetermined position; A plurality of shutter sectors having first and second shaft holes formed therein, the fixed protrusions of the annular permanent magnet being coupled to the first shaft holes, and controlling the amount of light incident to the light passing holes; And A cover housing having a protrusion coupled to the second shaft hole and having a light passing hole for providing the light is formed. A shutter for a camera phone mounted on a solenoid drive annular permanent magnet, characterized in that consisting of. The method of claim 1, wherein the number of protrusions formed on the annular permanent magnet is A shutter for a camera phone mounted on a solenoid-driven annular permanent magnet characterized by matching the number of shutter sectors. The method of claim 1, wherein the pair of solenoids, A shutter for a camera phone mounted on a solenoid-driven annular permanent magnet, characterized in that it is provided at a position slightly lower than the intermediate position of the annular permanent magnet. The shutter for a camera phone according to claim 1, wherein the shutter for the camera phone mounted on the solenoid-driven ring-shaped permanent magnet is A control unit for controlling the output size of the current, And a current supply unit for supplying current to the solenoid in response to the control of the control unit.

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