TWI709811B - Image stabilizing device for camera - Google Patents

Abstract

An image stabilizing device for camera includes a fixed base and a movable platform. The fixed base includes at least two fixed guide rods and a body of fixed base, and the fixed guide rods are disposed on the body of fixed base. The movable platform includes two movable guide rods and a body of movable platform, and the fixed guide rods are disposed on the body of movable platform. Wherein the fixed guide rods are contacted with the fixed guide rods, and the movable platform is movably connected to the fixed base. The image stabilizing device further includes a plurality of elastic bodies, one end of the plurality of elastic bodies is connected to the body of movable platform, and the other end of the plurality of elastic bodies is connected to the body of fixed base. Thus, the fixed guide rods are tightly contacted with the movable guide rods.

Description

Image stabilizer of camera

The present invention relates to an image stabilizer, in particular to an image stabilizer used in a shooting device.

Generally, an image stabilizer is installed on the imaging position of the lens in the shooting device, and the image sensor used to receive the lens imaging is installed on the image stabilizer. When the shooting device senses that there is shaking, it passes through the image stabilizer. The image stabilizer can adjust the position of the image sensor to keep the lens image clear and not blurred.

Please refer to Figure 1. Figure 1 is a schematic diagram of the structure of a conventional image sensor used in a shooting device. The image stabilizer 1 includes a base 10, a horizontal sliding frame 31 and a vertical sliding frame 32, and an image The sensor 2 is arranged on the longitudinal sliding frame 32. By changing the positions of the horizontal sliding frame 31 and the vertical sliding frame 32 relative to the base 10, the horizontal and vertical positions of the image sensor 2 relative to the lens can be adjusted.

The image stabilizer 1 further includes two horizontal rails 11 and two longitudinal rails 313. The two horizontal rails 11 are metal round rods and are embedded in the base 10 so that the horizontal sliding frame 31 can move axially along the two horizontal rails 11 The two longitudinal guide rails 313, which are also metal round rods, are embedded in the horizontal sliding frame 31, so that the longitudinal sliding frame 32 can be combined with the horizontal sliding frame in a manner that can move axially along the two longitudinal guides 313. 31 on.

In addition, a lateral reference magnet 20a and a longitudinal reference magnet 20b are respectively provided on the base 10, and a lateral drive coil 40a and a longitudinal drive coil 40b are respectively provided on the longitudinal sliding frame 32 corresponding to the lateral reference magnet 20a and the longitudinal At the position of the reference magnet 20b, when the camera detects that the user's hand is shaking, the circuit inside the camera (not shown) will introduce appropriate currents to the horizontal drive coil 40a and the vertical drive coil 40b to drive the coils horizontally 40a and the vertical drive coil 40b generate corresponding magnetic fields, and the horizontal reference magnet 20a and the vertical reference magnet 20b attract or repel to drive the vertical sliding frame 32 equipped with the image sensor to generate relative The horizontal and vertical movement of 10 adjusts the position of the image sensor 2 to keep the lens imaging clear and not blurred.

However, the friction force generated when the guide rails are in axial sliding contact between the base 10, the horizontal sliding frame 31 and the longitudinal sliding frame 32, and the operating gap between these elements will make the overall operation not smooth. As a result, the compensation sensitivity of the image stabilizer decreases.

In view of this, the image stabilizer of the shooting device of the present invention uses direct contact between a plurality of guide shafts as the contact point for a moving platform to move relative to a fixed base, so as to reduce the difference between the conventional guide rail and the base and the horizontal and vertical The friction force generated when the sliding frame is in axial sliding contact, and the movable platform and the fixed seat are brought into close contact with each other through a plurality of elastic bodies, thereby reducing the operating gap between the movable platform and the fixed seat, thereby improving the image The compensation sensitivity of the stabilizer.

A preferred embodiment of the image stabilizer of the shooting device of the present invention includes a fixed base, a movable platform, and a plurality of elastic bodies. The fixed base includes at least two fixed base guide shafts and a fixed base body. The fixed base guide shafts Is set on the fixed base body, the mobile platform includes two mobile platform guide shafts and a mobile platform body, the mobile platform guide shafts are set on the mobile platform body, wherein the fixed base guide shafts and the mobile platform The guide shafts are in contact with each other, and the movable platform is movably connected to the fixed seat.

In another embodiment, the image stabilizer of the shooting device of the present invention further includes a plurality of elastic bodies. One end of the elastic bodies is connected to the movable platform body, and the other end is connected to the fixed base body, so that the fixed base guide shafts are connected to the fixed base body. When the guide shafts of the movable platform are in close contact, and when the movable platform slides relative to the fixed seat, the guide shafts of the fixed seat and the guide shafts of the movable platform have at least three point-to-point close contact.

In another embodiment, the image stabilizer of the photographing device of the present invention further includes a first driving element and a first magnetic element. The first driving element is disposed on the movable platform body, and the first magnetic element is disposed on the fixed body. The position of the seat body relative to the first driving element.

In another embodiment, the image stabilizer of the photographing device of the present invention further includes a first driving element and a first magnetic element. The first driving element is disposed on the fixing base body, and the first magnetic element is disposed on the moving body. The position of the platform body relative to the first driving element.

In another embodiment, the first driving element can generate a first magnetic field, and the first magnetic field and the first magnetic element can attract or repel each other to drive the moving platform relative to the fixed base. Slide horizontally.

In another embodiment, the first driving element is a driving coil, and the first magnetic element is a magnet.

In another embodiment, the image stabilizer of the photographing device of the present invention further includes a second driving element and a second magnetic element. The second driving element is disposed on the movable platform body, and the second magnetic element is disposed on the fixed body. The position of the seat body relative to the second driving element.

In another embodiment, the image stabilizer of the photographing device of the present invention further includes a second driving element and a second magnetic element. The second driving element is disposed on the fixing base body, and the second magnetic element is disposed on the moving The position of the platform body relative to the second driving element.

In another embodiment, the second driving element can generate a second magnetic field, and the second magnetic field and the second magnetic element can attract or repel to drive the moving platform relative to the fixed base. Sliding longitudinally.

In another embodiment, the second driving element is a driving coil, and the second magnetic element is a magnet.

1‧‧‧Image Stabilizer

2‧‧‧Image sensor

3‧‧‧Image Stabilizer

10‧‧‧Base

11‧‧‧Transverse rail

20‧‧‧Fixed seat

20a‧‧‧Horizontal reference magnet

20b‧‧‧Vertical reference magnet

21‧‧‧Fixed seat body

22‧‧‧Fixed seat guide shaft

23‧‧‧Elastomer

30‧‧‧Mobile Platform

31: Horizontal sliding frame

32: Longitudinal sliding frame

33: Mobile platform body

36: mobile platform guide shaft

40a: transverse drive coil

40b: Longitudinal drive coil

60a: first drive element

60b: second drive element

80a: The first magnetic element

80b: second magnetic element

100a: the first Hall element

100b: second Hall element

313: Longitudinal rail

Figure 1 is a schematic diagram of the structure of a conventional image stabilizer.

Figure 2 is a schematic diagram of one embodiment of the image stabilizer of the camera of the present invention.

Figure 3 is a schematic diagram of the image stabilizer of Figure 2 when combined.

Please refer to Figures 2 and 3. Figures 2 and 3 show an embodiment of the image stabilizer of the camera of the present invention. An image stabilizer 3 can be installed in a camera at a position where a lens image is formed, and the image stabilizer An image sensor (not shown) can be set on 3, and the light emitted by a target can reach the image sensor through the lens. In this embodiment, the image stabilizer 3 of the present invention includes a fixing seat 20 and a mobile platform 30, the fixed base 20 includes four fixed base guide shafts 22 and a fixed base body 21, the mobile platform 30 includes two mobile platform guide shafts 36 and a mobile platform body 33, wherein the fixed base guide shafts 22 The guide shafts 36 of these mobile platforms are in contact with each other, and the mobile platform 30 is movably connected to the fixed base 20.

The image stabilizer 3 further includes three elastic bodies 23. One end of the elastic bodies 23 is respectively connected to the mobile platform body 33, and the other end is respectively connected to the fixing base body 21, using the restoring force of the elastic bodies 23. , So that the mobile platform 30 can still be in close contact when sliding relative to the fixed seat 20. In this embodiment, the elastic bodies 23 are springs.

Among them, the four fixed seat guide shafts 22 are arranged on the fixed seat body 21, and the two mobile platform guide shafts 36 are arranged on the mobile platform body 33 at a vertical position relative to the four fixed seat guide shafts 22. When the fixed seat 20 and the mobile platform 30 When the three elastic bodies 23 are in close contact, the four fixed seat guide shafts 22 and the two mobile platform guide shafts 36 have at least three points of point-to-point contact, and the mobile platform 30 uses the at least three points of point-to-point contact relative to The fixed base 20 slides. In this embodiment, the four fixed base guide shafts 22 and the second movable platform guide shaft 36 are metal guide shafts.

The image stabilizer 3 further includes a first magnetic element 80a, a second magnetic element 80b, a first driving element 60a, a second driving element 60b, a first Hall element 100a, and a second Hall element 100b, The first magnetic element 80a and the second magnetic element 80b are arranged on the fixing base body 21, and the first driving element 60a, the second driving element 60b, the first Hall element 100a and the second Hall element 100b are arranged on the mobile platform body 33 relative to the first magnetic element 80a and a second magnetic element 80b, when the camera senses that there is shaking, the camera controls the first drive element 60a and the second drive element 60b to generate corresponding The magnetic field of the first magnetic element 80a and the second magnetic element 80b attract or repel each other, and the first magnetic element 80a and the second magnetic element 100b are detected through the first hall element 100a and the second hall element 100b. The second magnetic element 80b is moved to drive the mobile platform 30 to slide horizontally or longitudinally relative to the fixed base 20. In this embodiment, the first driving element 60a and the second driving element 60b are driving coils, and the first magnetic element 80a and a second magnetic element 80b are magnets.

Wherein, when the first driving element 60a generates a first magnetic field, it will attract or repel the first magnetic element 80a to drive the mobile platform 30 to slide laterally relative to the fixed base 20, and when the second drive The element 60b generates a second magnetic field, which will attract or repel a second magnetic element 80b to drive the mobile platform 30 to slide longitudinally relative to the fixed base 20.

Although in this embodiment, the first magnetic element 80a and the second magnetic element 80b are arranged on the fixed base body 21, the first driving element 60a and the second driving element 60b are arranged on the moving platform body 33 relative to the first magnetic element. The positions of the element 80a and a second magnetic element 80b, however, it can be understood that, in another embodiment, the first magnetic element 80a and the second magnetic element 80b can also be provided on the mobile platform body 33, and the first driving element 60a And the second driving element 60b is arranged on the fixing base body 21 at a position relative to the first magnetic element 80a and a second magnetic element 80b, and the remaining arrangement is similar to the foregoing description.

The image stabilizer of the shooting device of the present invention uses the point-to-point direct contact between a plurality of metal guide shafts as the contact point when the mobile platform slides relative to the fixed seat, reducing the conventional guide rail and the base and the horizontal and vertical The friction force generated when the sliding frame is in axial sliding contact, and the movable platform and the fixed seat are brought into close contact with each other through a plurality of elastic bodies, and the operating gap between the movable platform and the fixed seat is eliminated to improve the image The purpose of the stabilizer's sensitivity compensation, and because only a single moving platform is used, the mechanism configuration of the image stabilizer is simplified, and its assembly time and cost can be saved at the same time.

3‧‧‧Image Stabilizer

20‧‧‧Fixed seat

21‧‧‧Fixed seat body

22‧‧‧Fixed seat guide shaft

23‧‧‧Elastomer

30‧‧‧Mobile Platform

33‧‧‧Mobile platform body

36‧‧‧Moving platform guide shaft

60a‧‧‧First drive element

60b‧‧‧Second drive element

80a‧‧‧The first magnetic element

80b‧‧‧Second magnetic element

Claims (10)

An image stabilizer for a photographing device, comprising: a fixed base including at least two fixed base guide shafts and a fixed base body, the fixed base guide shafts are arranged on the fixed base body; and a mobile platform including two mobile platforms Guide shafts and a mobile platform body, the mobile platform guide shafts are arranged on the mobile platform body; wherein the fixed seat guide shafts and the mobile platform guide shafts are in contact with each other, and the mobile platform is movably connected to the fixed seat. For example, the image stabilizer of the shooting device described in the first item of the scope of patent application further includes a plurality of elastic bodies. One end of the elastic bodies is connected to the movable platform body, and the other end is connected to the fixing base body, so that the fixing bases guide the shaft The guide shafts of the movable platform are in close contact with the guide shafts of the movable platform, and when the movable platform slides relative to the fixed seat, the guide shafts of the fixed seat and the guide shafts of the movable platform have at least three point-to-point close contact. The image stabilizer of the photographing device described in the first item of the scope of patent application further includes a first driving element and a first magnetic element. The first driving element is arranged on the mobile platform body, and the first magnetic element is arranged on The position of the fixing base body relative to the first driving element. The image stabilizer of the photographing device described in the first item of the scope of patent application further includes a first driving element and a first magnetic element. The first driving element is arranged on the fixing base body, and the first magnetic element is arranged on The position on the mobile platform body relative to the first driving element. The image stabilizer of the photographing device described in item 3 or 4 of the scope of patent application, wherein the first driving element can generate a first magnetic field, and the first magnetic field and the first magnetic element have an attraction or repulsion effect , To drive the mobile platform to slide laterally relative to the fixed seat. For the image stabilizer of the photographing device described in item 3 or 4 of the scope of patent application, the first driving element is a driving coil, and the first magnetic element is a magnet. As described in item 3 or 4 of the scope of patent application, the image stabilizer of the imaging device further includes a second driving element and a second magnetic element. The second driving element is disposed on the moving platform body, and the second magnetic element It is arranged on the fixed base body relative to the position of the second driving element. The image stabilizer of the photographing device described in item 3 or 4 of the scope of patent application further includes a second driving element and a second magnetic element. The second driving element is disposed on the fixing base body, and the second magnetic element It is arranged on the mobile platform body relative to the position of the second driving element. For the image stabilizer of the photographing device described in claim 7, wherein the second driving element can generate a second magnetic field, and the second magnetic field and the second magnetic element can attract or repel each other to The mobile platform is driven to slide longitudinally relative to the fixed seat. According to the image stabilizer of the photographing device described in claim 7, wherein the second driving element is a driving coil, and the second magnetic element is a magnet.

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