TWI443445B - Mechanical shutter and mobile phone using the same - Google Patents

Description

Mechanical shutter and mobile phone using the mechanical shutter

The present invention relates to a mechanical shutter and a mobile phone using the same.

The shutter is an important component of the camera, which controls the exposure time of the photosensitive element in the camera to control the sharpness of the image.

The shutter is divided into two types: the inter-mirror shutter and the curtain shutter. The inter-mirror shutter, also known as the center shutter, is composed of 3 to 5 thin steel sheets or other special materials in the middle of the lens. The springs are stretched and leveraged to make the blades simultaneously open, so that the blades can be fastened. Control the exposure time of the photosensitive element. The curtain shutter, also known as the focal plane shutter, is placed in front of the photosensitive element on the back wall of the fuselage, close to the focal plane. This shutter is made of a rubber cloth or a metal sheet. The shutter speed is slow and is adjusted according to the size of the gap between the two leaf curtains. When the shutter is opened, the fabric is swept left and right or up and down, and the light is instantaneously incident on the photosensitive member through the gap between the curtains, so that the photosensitive member is exposed.

However, the conventional shutter structure is complicated, and a structure such as a motor, a lever, and a spring is often required to be used together, which makes the entire shutter difficult to be miniaturized, and due to the complicated structure, the work reliability is low and the malfunction is likely to occur.

In particular, since the structure of the above-described mechanical shutter is difficult to be miniaturized, it cannot meet the needs of a small camera device such as a camera mobile phone, which also becomes a restriction on a small camera. One of the bottlenecks in the shooting effect.

In view of this, it is necessary to provide a mechanical shutter that is compact in structure and is particularly suitable for use in a mobile phone camera.

A mechanical shutter includes a blade, a magnetic element, a coil, a core and a base, the base having a surface, a center of the surface is provided with a first through hole, the coil is wound around the core, and the core surrounds the first pass a hole is disposed on the surface, the iron core has a first end and a second end in the same plane, and a fixed shaft is disposed between the first end and the second end, the fixing shaft is fixed on the surface, the magnetic component And the blade is sleeved on the fixed shaft, and the electromagnetic field formed after the coil is energized drives the magnetic element to rotate and drives the blade to block or expose the first through hole.

Preferably, the number of the blades is one.

Preferably, the buffer portion is a cantilever structure having one end fixed to the surface and the other end adjacent to the through hole, the buffer portion for abutting the blade.

A mobile phone comprising a photographing device comprising a mechanical shutter comprising a blade, a magnetic element, a coil, a core and a base, the base having a surface, the surface of which is provided with a first through hole, the coil is wound In the iron core, the iron core is disposed on the surface around the first through hole, the iron core has a first end and a second end, and a fixed shaft is disposed between the first end and the second end, the fixed shaft Fixed on the surface, the magnetic element and the blade are sleeved on the fixed shaft, and the electromagnetic field formed after the coil is energized drives the magnetic element to rotate and drives the blade to block or expose the first through hole.

Preferably, the number of the blades is one.

Preferably, further comprising a buffer portion, which is a cantilever beam structure, one end of which is solid It is fixed to the surface, and the other end is a free end and is close to the through hole, and the buffer portion is for abutting against the blade.

Compared with the prior art, the mechanical shutter provided by the invention has a compact structure and is suitable for a mobile phone camera device, so as to improve the camera effect of the mobile phone. A blade number of one can effectively reduce the production cost of the mechanical shutter and further simplify the structure of the mechanical shutter. The buffer portion prevents the blade from rebounding due to excessive torque when the blade blocks the first through hole or does not completely cover the first through hole due to improper parking position.

10‧‧‧Mechanical shutter

20‧‧‧ leaves

21‧‧‧ first end

22‧‧‧ second end

30‧‧‧ permanent magnet

40‧‧‧ coil

50‧‧‧ iron core

51‧‧‧ first end

52‧‧‧ second end

60‧‧‧Base

61‧‧‧ surface

62‧‧‧First through hole

63‧‧‧Fixed shaft

64‧‧‧ buffer

65‧‧‧ Positioning table

66‧‧‧Positioning holes

68‧‧‧ gap

641‧‧‧ one end

642‧‧‧The other end

70‧‧‧Upper cover

71‧‧‧Second through hole

72‧‧‧ lower surface

73‧‧‧Positioning column

80‧‧‧Rotary axis

81‧‧‧Care Department

FIG. 1 is a schematic perspective view of a mechanical shutter according to an embodiment of the present invention.

2 is an exploded perspective view of the mechanical shutter shown in FIG. 1.

Figure 3 is a plan view showing the light-passing state of the mechanical shutter shown in Figure 1.

4 is a plan view showing the light shielding state of the mechanical shutter shown in FIG. 1.

Referring to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , a mechanical shutter 10 according to an embodiment of the invention includes a blade 20 , a permanent magnet 30 , a coil 40 , an iron core 50 , and a base 60 .

The base 60 has a surface 61 having a first through hole 62 in the center thereof.

The coil 40 is wound around the core 50, and the coil 40 may be wound around the entire core 50 or only a part of the core 50 may be wound.

The iron core 50 is disposed on the surface 61 around the first through hole 62. In the present embodiment, the base 60 has a square shape. To obtain the maximum range of magnetic fields, the core 50 is also bent into a square substantially equilateral to the base 60 and disposed along four sides of the base 60. 50 has a first end 51 and a second end 52 that are in the same plane. The first end 51 and the second end 52 is located at a top corner of the base 60 and vacates the position of the apex angle, that is, there is a gap between the first end 51 and the second end 52. A fixed shaft 63 having a cylindrical structure is disposed between the first end 51 and the second end 52. The fixed shaft 63 is fixed to the surface 61.

The permanent magnet 30 and the blade 20 are sleeved on the fixed shaft 63. The permanent magnet 30 may be located above the blade 20 or below the blade 20. In the embodiment, the permanent magnet 30 is located at the blade. 20 below. The blade 20 has a flat spiral shape and has a first end 21 and a second end 22. The first end 21 has a through hole for fixing to the fixed shaft 53. The second end 22 has a large area enough to block the first through hole. 62. The first end 21 and the second end 22 are connected by an arc structure.

The permanent magnet 30 is a ring magnet having one side of the diameter of the N pole and the other side of the S pole. For example, one side near the first end 51 is an N pole, and one side near the second end 52 is an S pole. After the coil 40 is energized, if the first end 51 is magnetized to the N pole, the second end 52 is magnetized to the S pole, and since the N pole of the permanent magnet 30 and the first end 51 repel each other, the permanent magnet 30 S The poles and the second end 52 repel each other to drive the permanent magnet 30 to rotate about the fixed shaft 63, thereby driving the blade 20 closely connected with the permanent magnet 30 to rotate, thereby blocking or revealing the first through hole 62.

Of course, the permanent magnets 30 can also be of other shapes, such as elongated magnets, which, regardless of shape, function the same in the mechanical shutter 10 provided by embodiments of the present invention and are used to drive the blades 20 to rotate.

In the present embodiment, the number of the blades 20 is 1, which can effectively reduce the production cost of the mechanical shutter and further simplify the structure of the mechanical shutter.

Of course, a greater number of blades are also possible, such as providing another fixed shaft, another permanent magnet and blades at the other corner of the base 60.

Preferably, the mechanical shutter 10 further includes a rotating shaft 80. The rotating shaft 80 has an annular shape and is sleeved on the fixed shaft 30. The permanent magnet 30 can be internally provided with a thread (not shown), and the rotating shaft 80 is provided. The inside is also provided with a thread (not shown), which can be combined more closely. Moreover, the rotating shaft 80 extends a engaging portion 81 on the side surface thereof, and the engaging portion 81 can be embedded in the blade 20 The first end 21 causes the rotating shaft 80 to rotate due to the rotation of the permanent magnet 30, and can further drive the blade 20 to rotate.

Preferably, the mechanical shutter 10 further includes a buffer portion 64 having a cantilever beam structure, one end 641 of which is fixed to the surface 61 without axial, vertical displacement and rotation, and the other end 642 is a free end and close to the The first through hole 62. Specifically, the buffer portion 64 is substantially a rectangular parallelepiped, and is substantially tangent to the first through hole 62. The tangent point is the second end 642 of the buffer portion 64, and the second end 642 is gradually curved into an arc shape. One end 641 is bent.

When the blade 20 is driven by the rotation of the permanent magnet 30, the blade 20 may be rebounded due to excessive torque. At this time, the buffer portion 64, especially the second end 642 thereof, can effectively prevent the blade 20 from rebounding. If the blade 20 is beyond the area of the first through hole 61 because the torque is too large, the buffer portion 64 can also effectively prevent the blade 64 from excessively rotating. In particular, the buffer portion 64 is a cantilever structure, and the second end 642 is a free end, which can effectively absorb the impact force of the blade 20 for buffering purposes.

In the present embodiment, the height of the buffer portion 64 is substantially the same as the height of the fixed shaft 63. Further, in order to enhance the stability of the mechanical shutter 10, a positioning table 65 may be disposed around the first through hole 62. The positioning table 65 is substantially in the shape of a rounded cube. The center of the positioning table 65 is a through hole having a central axis and a central axis of the first through hole 62. The positioning table 65 has a notch 68 communicating with the through hole. The buffer portion 64 is received in the notch 68. The second end 642 of the buffer portion 64 is substantially tangent to the first through hole 62. . The notch 68 separates a top corner portion of the positioning table 65 from the other portion of the positioning table 65. The height of the separated corner portion coincides with the height of the buffer portion 64, and the blade 20 is slightly higher than the positioning table. 65, slightly lower than the height of the buffer portion 64.

Preferably, the mechanical shutter 10 further includes an upper cover 70, and the upper cover 70 is packaged together with the base 60 for covering the structure of the base 60 except the first through hole 62. The center of the upper cover 70 is provided with a second through hole. 71. After the package, the first through hole 62 and the second through hole 71 have an axis coincident, and the light is incident from the second through hole 71 to the first through hole 62. Preferably, the diameter of the first through hole 62 of the base 60 is larger than the diameter of the second through hole 71 of the upper cover 70.

Further, the mechanical shutter 10 further includes a positioning post 73 having a lower surface 72 opposite to the surface 61 of the base 60. The positioning post 73 is disposed on the lower surface 72 and away from the second through hole 71. The positioning post 73 and the buffer portion 64 function similarly to stop the blade 20 to assist in rapid resetting of the blade 20.

The upper cover 70 and the base 60 can also be fixed by a positioning pin. The lower surface 72 of the upper cover 70 is provided with a pair of positioning pins 73. A pair of positioning holes 66 are defined in the positioning table 65 of the base 60. The pair of positioning pins 73 and the pair of positioning holes 66 are screwed to the upper cover. 70 and the base 60 are sealed.

If there is no positioning table 65, the package can be realized by dispensing between the upper cover 70 and the base 60.

The mechanical shutter 10 provided by the embodiment of the invention has the advantages of small size and simple structure, and is especially suitable for a mobile phone or other portable electronic device having a photographing device, so as to improve the imaging effect of the small-sized photographing device.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. please. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Mechanical shutter

20‧‧‧ leaves

21‧‧‧ first end

22‧‧‧ second end

30‧‧‧ permanent magnet

40‧‧‧ coil

50‧‧‧ iron core

51‧‧‧ first end

52‧‧‧ second end

60‧‧‧Base

61‧‧‧ surface

62‧‧‧First through hole

63‧‧‧Fixed shaft

64‧‧‧ buffer

65‧‧‧ Positioning table

66‧‧‧Positioning holes

641‧‧‧ one end

642‧‧‧The other end

70‧‧‧Upper cover

71‧‧‧Second through hole

72‧‧‧ lower surface

73‧‧‧Positioning column

80‧‧‧Rotary axis

81‧‧‧Care Department

Claims (9)

A mechanical shutter is improved in that it comprises a blade, a magnetic element, a coil, a core and a base, the base having a surface, a center of the surface is provided with a first through hole, the coil is wound around the core, and the core surrounds The first through hole is disposed on the surface, the iron core has a first end and a second end in the same plane, and a fixed shaft is disposed between the first end and the second end, and the fixed shaft is fixed on the surface The magnetic component and the blade are sleeved on the fixed shaft, and the electromagnetic field formed by the coil is driven to drive the magnetic component to rotate and drive the blade to block or expose the first through hole. The surface of the base is provided with a buffer portion. The buffer portion is a cantilever beam structure, one end of which is fixed to the surface, and the other end is a free end and close to the first through hole, and the free end of the buffer portion is higher than the height of the blade relative to the surface for abutting blade. The mechanical shutter of claim 1, wherein: the number of the blades is one. The mechanical shutter of claim 1 , further comprising: a rotating shaft sleeved on the fixed shaft, the rotating shaft being screwed to the magnetic element, the rotating shaft and the blade being mutually engaged. The mechanical shutter of claim 1, wherein: further comprising a second through hole upper cover, the second through hole being coincident with the first through hole central axis. The mechanical shutter of claim 4, further comprising: a positioning post having a lower surface opposite to a surface of the base, the positioning post being disposed on the lower surface and away from the second through hole, the positioning post To resist the blade. The mechanical shutter of claim 1, wherein the magnetic element is an annular permanent magnet having one side of the diameter of the N pole and the other side of the S pole. The mechanical shutter of claim 1, wherein: the base is square, and the fixed shaft is disposed at a corner of the base. The mechanical shutter of claim 7, wherein: the core surrounds a square area. A mobile phone comprising a photographing device, the improvement comprising the mechanical shutter of any one of claims 1-8.