KR100935533B1 - Shutter apparatus for camera - Google Patents

Abstract

The present invention relates to a shutter device for a camera used in a small digital device, comprising: a base having a first light transmitting hole for transmitting light to a lens unit; A cover having a second light transmission hole detachably coupled to one side of the base and disposed coaxially with the first light transmission hole; First and second electromagnets disposed to face each other on one side of the base, a driving arm pivotally disposed between the first and second electromagnets, and coupled to the driving arms, each of the first and second electromagnets A driving unit having magnetic magnets in which the N and S poles are rotated in response to the magnetic fields of the N and S poles formed at both ends; And first and second shutters connected to the driving units, respectively, for opening and closing the first light transmitting holes while reciprocating in opposite directions along the longitudinal direction of the base by driving of the driving unit. The magnetic is characterized in that the magnetic force between the N and S poles of the magnetic and the first and second electromagnets is discontinuous when turning in one direction and the reverse direction between the first and second electromagnets.

Mobile Phone, Camera, Shutter, Magnetic, Delay Time, Shutter Speed

Description

Shutter apparatus for camera

The present invention relates to a shutter device for a camera, and more particularly, to a shutter device for a camera used in a small digital device.

With the development of digital technology, various digital devices such as mobile communication terminals, handheld game consoles, personal digital assistants (PDAs), personal multimedia players (PMPs), and digital camcorders have been introduced.

The camera unit installed in such a portable digital device includes a shutter device that can take a picture like a normal camera.

In particular, as the camera of a mobile phone, a mobile communication terminal, becomes high quality, the adoption of a mechanical shutter is essential. In order to slim down a mobile phone, miniaturization and slimming of the camera module are also essential, so it is important to simplify the structure of the shutter device. In addition, the camera unit preferably makes the shutter operation speed as fast as possible in order to take good quality pictures.

However, the conventional camera shutter apparatus used in such a portable digital device adopts a power source having a relatively large size for transferring a predetermined driving force to the shutter in order to ensure a fast driving speed of the shutter, and thus the shutter apparatus Of course, there was a problem that the overall size of the lens unit is increased. This problem ultimately affects the size of the entire portable digital device, thereby reducing the portability of the portable digital device.

In addition, the conventional shutter apparatus has a delay time in which the shutter does not operate immediately due to an opening / closing signal due to a structural problem, and causes a decrease in the shutter speed. In particular, in the case of a digital camera in which the shutter is to operate at a high speed, a decrease in the shutter speed causes a problem of deterioration in shooting quality.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a shutter device for a camera employing a digital compact device such as a mobile phone that can maintain the driving performance of the shutter while forming a very small size.

In order to achieve the above object, the present invention includes a base having a first light transmitting hole for transmitting light to the lens unit; A cover having a second light transmission hole detachably coupled to one side of the base and disposed coaxially with the first light transmission hole; First and second electromagnets disposed to face each other on one side of the base, a driving arm pivotally disposed between the first and second electromagnets, and coupled to the driving arms, each of the first and second electromagnets A driving unit having magnetic magnets in which the N and S poles are rotated in response to the magnetic fields of the N and S poles formed at both ends; And first and second shutters connected to the driving units, respectively, for opening and closing the first light transmitting holes while reciprocating in opposite directions along the longitudinal direction of the base by driving of the driving unit. The magnetic shutter is a camera shutter device, characterized in that the magnetic force between the first and second electromagnets of the magnetic pole between the first pole and the second pole and the first electromagnet when the direction is reversed To provide.

The magnetic is formed in an arc shape, in this case, the magnetic plane is formed in a portion of the circumference, a curved surface is formed in the remaining portion of the circumference, the curved surface at a position corresponding to each other based on the center of the magnetic The magnetic poles of the north pole and the south pole may be magnetized.

In addition, the driving arm has a support surface formed in a plane inwardly formed in the extension extending to the lower side, the magnetic is driven to rotate the magnetic together with the drive arm as the plane of the magnetic is placed in close contact with the support surface .

In addition, the magnetic plane is formed on both sides of the circumference corresponding to each other, the curved surface is formed on each of the remaining both sides of the circumference, and the magnetic pole of the N pole and the S pole may be magnetized on the curved surface, respectively. In this case, the driving arm may have a support surface formed of a plane on one side of the extended portion extending downward, and the magnetic may be formed such that any one of two planes of the magnetic is disposed in close contact with the support surface.

The drive arm and the magnetic may be coupled by shafts passing through their respective centers.

In the present invention as described above, as the attraction force or repulsive force acts on both sides of the magnetic installed in the drive arm, the first and second shutters connected to the drive arm are operated at high speed without delay time by more than twice as much force as in the prior art. There is an advantage that can take a high-resolution clear picture.

Furthermore, by intensively arranging the driving unit and the first and second shutters, it is possible to ensure the high speed operation of the shutter and to keep the size of the shutter device compact.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the shutter device for a camera of the present invention.

1 to 3, the shutter device according to the present embodiment includes a base 10, a cover 20, a driver 30, and first and second shutters 50 and 60.

The base 10 has a receiving space 10a in which the driving unit 30 is inserted at one side, and a sliding unit 10b in which the first and second shutters 50 and 60 are driven to slide. In this case, when the first shutter 50 is driven on the upper surface, the sliding part 10b minimizes the contact area between the first shutter 50 and the upper surface of the sliding part 10b to drive the speed of the first shutter 50. A plurality of contact protrusions 11 are formed so as not to deteriorate. In addition, the sliding portion 10b is formed so that the first light transmitting hole 13 has a predetermined diameter in a substantially central portion.

In addition, the base 10 has protruding portions 15a and 15b for guiding the first and second shutters 50 and 60 on both sides of the upper surface of the sliding portion 10b, and the extension portions 15a and 15b. A pair of guide protrusions 16a and 16b are respectively formed on the top surface of the. In this case, the pair of guide protrusions 16a and 16b guide the coupling of the cover 20 so that the user can quickly and accurately couple the cover 20 to the base 10.

On the other hand, the base 10 may be provided with a predetermined PCB (not shown) for applying a current to the first and second coil parts 32 and 34 of the driving unit 30 to be described later.

The cover 20 prevents the driving unit 30 and the first and second shutters 50 and 60 from being separated from the sliding unit 10b, and the driving unit 30 and the first and second shutters 50 and 60. ) Is detachably coupled to the top of the base (10) to be operably supported. In this case, the cover 20 is formed with a plurality of coupling pieces 21 extending at predetermined intervals along the side end, a plurality of coupling pieces 21 each formed at a predetermined interval along the circumference of the base 10 Snap coupling protrusion 17 is snap coupled.

In addition, the cover 20, like the base 10, is formed with a plurality of contact protrusions 22 contacting the second shutter 60 on one surface thereof, and the first light transmitting hole 13 of the base 10 is approximately at the center. ) And a second light transmission hole 23 corresponding to Furthermore, when the cover 20 is coupled to the base 10, a hinge hole 27 is formed at a portion corresponding to the driving unit 30, and the cover 20 is disposed to correspond to the hinge hole 27 and has a predetermined curvature. Second guide holes 25a and 25b are formed. In addition, the cover 20 has insertion holes 26a and insertion grooves 26b, respectively, into which the pair of guide protrusions 16 of the base 10 are inserted, respectively.

The drive unit 30 includes first and second electromagnets 31 and 33, a drive arm 35, and a magnetic 37.

The first and second electromagnets 31 and 33 are formed of the bobbins 31a and 33a and the bobbins 31a and 33a respectively having both ends 31b, 31c; 33b and 33c bent in the same direction and having an inverted U shape. Each of the bobbins 31a and 33a is wound around the bobbins 31a and 33a so that magnetic fields are formed at both ends, and the first and second coils 32 and 34 are respectively provided for applying current to the bobbins 31a and 33a. In this case, the first and second electromagnets 31 and 33 are installed in the receiving space 10a of the base 10 with both ends 31b, 31c; 33b, 33c facing each other.

Both ends of the shaft 34 are rotatably inserted into the hinge hole 10d of the accommodation space 10a and the hinge hole 27 of the cover 20, respectively.

The driving arm 35 is coupled to the shaft 34 through a through hole 35a formed at the center thereof, and the first and second arm parts 35b and 35c protrude from each other symmetrically on both sides, and the first and second arms 35b are protruded. The arm portions 35b and 35c are provided with first and second guide protrusions 35d and 35e protruding at right angles to the first and second arm portions 35b and 35c, respectively. In this case, the first and second guide protrusions 35d and 35e are respectively inserted into the guide holes 25a and 25b of the cover 20, and in this case, the driving arms 35 along the lengths of the guide holes 25a and 25b. It is also possible to control the turning angle of In addition, the guide protrusions 35d and 35e are slidably inserted into the respective long holes 51 and 61 of the first and second shutters 50 and 60, and thus, when the driving arm 35 is turned, the first and second guide protrusions 35d and 35e are slidably inserted. The shutters 50 and 60 are simultaneously driven in opposite directions along the longitudinal directions of the first and second shutters 50 and 60.

In addition, the driving arm 35 has an extension portion 35f formed on one side of the central portion extending in the reverse direction of the guide protrusions 35d and 35e, and the extension portion 35 has a plane supporting the magnetic 37 on one side. The support surface 35g is formed.

Magnetic poles of the magnetic poles of the N pole and the S pole are magnetized on both sides, respectively, as shown in FIG. 3, and have an arc shape, and are coupled to the shaft 34 through a through hole 37c formed at the center thereof. The magnetic 37 has a flat surface 37a in close contact with the support surface 35g of the driving arm 35 on one side thereof, and the circumference of the remaining magnetic 37 has a curved surface 37b. In this case, it is preferable that the N pole and the S pole of the magnetic 37 are faceted at positions corresponding to each other on the curved surface 37b.

In addition, as the magnetic 37 is located between the bottom face 35h of the driving arm 35 and the rib 34a of the shaft 34, the magnetic 37 is prevented from flowing in the longitudinal direction of the shaft 34. As the support surface 35g of the driving arm 35 and the plane 37a of the magnetic 37 come into close contact with each other, the magnetic 37 is prevented from rotating in the circumferential direction of the shaft 34. In addition, when a predetermined adhesive is applied to the support surface 35g and the bottom surface 35h of the drive arm 35 when the magnetic 37 is installed on the drive arm 35, the magnetic 37 is driven to the drive arm 35. It can be fixed more firmly.

In the present embodiment, the shape of the magnetic 37 is illustrated as an example of an arc shape as shown in FIG. 3, but is not limited thereto. As shown in FIG. 4, the magnetic 137 has a cutaway surface in which both sides are symmetrically cut in a garden shape. 137a and 137b, and the curved surfaces 137c and 137d may be formed on the remaining symmetrical portions. In this case, it is preferable that the magnetic poles of the magnetic poles 137c and 137d face the magnetic poles of the N pole and the S pole, respectively. Thus, even in the case of the magnetic 137 according to another embodiment, the same function and effect as the magnetic 37 of the above-described embodiment can be obtained.

As described above, since the magnetic 37 is stably fixed to the driving arm 35, the magnetic 37 rotates integrally with the driving arm 35 by a high-speed swinging operation of the driving arm 35, and thus, the first and second electromagnets 31. After the magnetic 37 is provided between and 33, the installation angles of the N pole and the S pole can be maintained as it is even when the magnetic 37 is turning.

The first shutter 50 has a long hole 51 into which the first guide protrusion 35d of the driving arm 35 is inserted at one side, and a first opening for opening and closing the first light transmitting hole 13 at the other side. Grooves 53 are formed.

The second shutter 60 is slidably overlapped with the first shutter 50, and a second long hole 61 into which the second guide protrusion 35e of the driving arm 35 is inserted is formed at one side, and the driving arm is formed. A second opening recess 63 for opening and closing the first light transmitting hole 13 together with the first opening recess 53 is formed on the side facing the 35.

The operation of the shutter device for a camera according to an embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 5 and 6. Prior to the explanation of operation, the position of the magnetized magnetic pole of the magnetic 37 is, as shown in Figure 5, when the N pole is magnetized to the side adjacent to the first electromagnet 31 when the center of the drive arm 35, 2 S poles are defined as magnetized to the side adjacent to the electromagnet 33, respectively.

Referring to FIG. 5, the shutter device may turn on a camera (not shown) or in case of a mobile phone (not shown) having a built-in camera, to set a shooting mode, and the first light penetrating hole 13 of the base 10 may be used. The first and second shutters 50 and 60 are completely closed to obtain an initial state in which the film or charge-coupled device (CCD) is not exposed to light.

In this initial state (see Fig. 5), press the shutter button (not shown) installed in the camera or mobile phone for taking a picture.

Accordingly, when current is simultaneously applied to the first and second coil parts 32 and 34, as shown in FIG. 6, S and N poles are formed at both ends 31b and 31c of the first bobbin 31a, respectively. Magnetic fields of the S pole and the N pole are also formed at both ends 33b and 33c of the second bobbin 33a. That is, magnetic fields of the same magnetic pole are formed at one end 31b, 33b and the other end 31c, 33c of the first and second bobbins 31a, 33a disposed opposite to each other with respect to the magnetic 37.

When the driving arm 35 is rotated, the repulsive force acts between the N pole of the magnetic 37 and the other end 31c of the first bobbin 31a, and the one end of the S pole of the magnetic 37 and the second bobbin 33a. The repulsive force acts between the 31b, and as the opening of the light transmitting hole approaches, the attraction force acts between the N pole of the magnetic 37 and one end 31b of the first bobbin 31a, and the magnetic 37 The attraction force acts between the S-pole of) and the other end 33c of the second bobbin 33a.

Accordingly, the driving arm 35 slides the first shutter 50 toward the driving unit 30 while turning the predetermined angle in the clockwise direction, and moves the second shutter 60 to the opposite side of the driving unit 30. And the second opening grooves 53 and 63 move to face each other to open the first light penetrating hole 13.

As such, the attraction and repulsive forces alternately in four directions on each of the two ends 31b, 31c, 33b, and 33c between the first and second electromagnets 31 and 33 and the N and S poles of the magnetic 37, respectively. By acting, the driving arm 35 can be rotated at high speed, thereby enabling high speed driving of the first and second shutters 50 and 60, for example, high speed operation of 1/1000 second, thereby providing a high resolution and clear image. Can be obtained.

Furthermore, when the magnetic 37 is formed in a garden as in the prior art, the magnetic 37 is the central pole 31m of the first electromagnet 31 and the N pole of the magnetic 37 in the process of turning clockwise from the initial state. Magnetic attraction between the liver and the magnetic attraction between the central portion 33m of the second electromagnet 33 and the S pole of the magnetic 37 act continuously, and each end of each of the first and second electromagnets 31 and 33 ( The magnetic force exerted between 31b, 31c, 33b, 33c and the N and S poles of the magnetic 37 is also a factor that hinders the turning of the driving arm 35.

On the contrary, in the present invention, as the magnetic 37 is not made of a garden, but is formed in a circular arc shape in which one side or both sides are cut in the garden shape, the N pole of the magnetic 37 when the magnetic 37 is turned and The magnetic force between the S pole and the center portions 31m and 33m of the first and second electromagnets 31 and 33 form a discontinuity, and both ends 31b and 31c of the first and second electromagnets 31 and 33 respectively. The magnetic force between the N pole and the S pole of the magnetic poles 33b and 33c and the magnetic 37 is also discontinuous so that the loss of rotational force due to unnecessary magnetic force is reduced. As a result, the driving arm 35 naturally turns without delay time. 2 It is possible to prevent the driving speed of the shutters 50 and 60 from decreasing.

On the other hand, after exposing the charge-coupled device (CCD) to light through the first light penetrating hole 13 opened for a predetermined time, the first and second coil parts 32 and 34 are again provided. 2 Current is applied in the reverse direction when the shutters 50 and 60 are opened.

Accordingly, as shown in FIG. 5, N and S poles are formed at both ends 31b and 31c of the first bobbin 31a, respectively, and N and S poles are formed at both ends 33b and 33c of the second bobbin 33a. Its magnetic field is formed. That is, magnetic fields of the same magnetic pole are formed at one end 31b, 33b and the other end 31c, 33c of the first and second bobbins 31a, 33a disposed opposite to each other with respect to the magnetic 37.

At this time, the repulsive force acts between the N pole of the magnetic 37 and the one end 31b of the first bobbin 31a, and the repulsive force between the S pole of the magnetic 37 and the other end 33c of the second bobbin 33a. This action, as the closing of the light transmission hole, the attraction force between the N pole of the magnetic 37 and the other end 31c of the first bobbin 31a, the S pole and the magnetic of the magnetic 37 The attraction force also acts between one end 33b of the two bobbins 33a.

Accordingly, the driving arm 35 slides the first shutter 50 to the opposite side of the driving unit 30 while turning the predetermined angle in the counterclockwise direction, and moves the second shutter 60 to the driving unit 30 side. As in the initial state, the first and second opening recesses 53 and 63 are moved in a direction crossing each other to close the first light penetrating hole 13.

In the shutter apparatus of the present invention as described above, as the attraction force and the repulsive force are alternately generated at each of two places in two directions on both sides of the magnetic 37 alternately, the driving arm 35 is rotated at high speed. The second shutters 50 and 60 may drive without a delay time.

1 is a perspective view showing a shutter device for a camera according to an embodiment of the present invention,

2 is an exploded perspective view showing a shutter device for a camera according to an embodiment of the present invention;

FIG. 3 is an enlarged perspective view illustrating the driving arm and the magnet shown in FIG. 2;

4 is an enlarged perspective view showing another embodiment of the magnetic shown in FIG. 3;

5 and 6 are schematic plan views showing an operating state of a shutter device for a camera according to an embodiment of the present invention.

* Description of Signs for Main Parts in Drawings *

10: base 20: cover

30: drive unit 31: first electromagnet

33: second electromagnet 35: driving arm

37,137: Magnetic 50: First Shutter

60: second shutter

Claims (6)

A base having a first light transmission hole for transmitting light to the lens unit; A cover having a second light transmission hole detachably coupled to one side of the base and disposed coaxially with the first light transmission hole; First and second electromagnets disposed to face each other on one side of the base, a driving arm pivotally disposed between the first and second electromagnets, and coupled to the driving arms, each of the first and second electromagnets A driving unit having magnetic magnets in which the N and S poles are rotated in response to the magnetic fields of the N and S poles formed at both ends; And, And first and second shutters respectively connected to the driving units to open and close the first light transmitting holes while reciprocating in opposite directions along the longitudinal direction of the base by driving of the driving unit. When the magnetic is turned in one direction and in the opposite direction between the first and second electromagnet, the magnetic force between the N pole and S pole of the magnetic and the first and second electromagnet is discontinuous, The magnetic is formed in an arc shape and a plane is formed on a part of the circumference, a curved surface is formed on the remaining part of the circumference, the curved surface is the two poles of the N pole and the S pole at positions corresponding to each other based on the center of the magnetic Shutter device for a camera, characterized in that the pole is magnetized. delete The shutter device of claim 1, wherein the driving arm has a support surface formed on a flat surface on one side of the extended portion extending downward, and the magnetic plane is disposed in close contact with the support surface. . A base having a first light transmission hole for transmitting light to the lens unit; A cover having a second light transmission hole detachably coupled to one side of the base and disposed coaxially with the first light transmission hole; First and second electromagnets disposed to face each other on one side of the base, a driving arm pivotally disposed between the first and second electromagnets, and coupled to the driving arms, each of the first and second electromagnets A driving unit having magnetic magnets in which the N and S poles are rotated in response to the magnetic fields of the N and S poles formed at both ends; And, And first and second shutters respectively connected to the driving units to open and close the first light transmitting holes while reciprocating in opposite directions along the longitudinal direction of the base by driving of the driving unit. When the magnetic is turned in one direction and in the opposite direction between the first and second electromagnet, the magnetic force between the N pole and S pole of the magnetic and the first and second electromagnet is discontinuous, The magnetic is formed in an arc shape and a plane is formed on both sides of the circumference corresponding to each other, and curved surfaces are formed on the remaining both sides of the circumference, and two poles of the N pole and the S pole are magnetized on the curved surface, respectively. A shutter device for a camera, characterized in that. The support arm according to claim 4, wherein the driving arm has a support surface formed in a plane inwardly in an extended portion extending downward, and the magnetic is arranged such that any one of two planes of the magnetic is in close contact with the support surface. A shutter device for a camera, characterized in that. The shutter device for a camera according to any one of claims 1 to 3, wherein the driving arm and the magnetic are coupled by shafts penetrating through their respective centers.

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