TWI408491B - Camera module - Google Patents

Abstract

The present invention relates to a camera module. The camera module includes a electromagnetic shutter including a base; a voice coil motor including a fixing group and a movable group accepted in the fixing group; a magnetic field obstructer between the shutter and the voice coil motor. The magnetic field obstructer is used to obstruct the magnetic field in the shutter and the magnetic field in the voice coil motor to avoid interference and is fixing relative to the shutter and the voice coil motor's fixing group. The camera module is smaller and simpler.

Description

Camera module

The invention relates to a camera module, in particular to a camera module with a focusing function.

With the rapid development of communication technology, digital cameras have been widely used in portable electronic devices such as mobile phones (see Development of compact camera module having auto focus actuator and mechanical shutter system for mobile phone, Control, Automation and Systems, 2007. ICCAS '07. International Conference on 17-20 Oct. 2007 Page(s): 2319-2322). At present, a commonly used camera module with a focusing function generally includes a shutter, a lens barrel, and a stepping motor that drives the lens barrel to move along a central axis thereof. The stepper motor drives the lens barrel for position adjustment, which ultimately achieves the purpose of focusing.

However, the stepping motor has a large volume and a complicated structure, so that the camera module having the stepping motor has a large volume and a complicated structure, and the digital camera having the camera module has a large volume and a complicated structure, and is directly The increase in the size of portable electronic devices such as mobile phones, notebook computers or personal digital assistants with the digital camera has brought many unnecessary troubles to people's work and life. .

In view of the above, it is necessary to provide a distance value measuring device and a distance measuring method that can overcome the above problems.

In view of this, it is necessary to provide a camera module that is small in size and simple in structure.

An electromagnetic shutter having a base; a voice coil motor having a fixed assembly with an open end and a movable assembly that is movably received in the fixed assembly and open at both ends; a magnetic field blocking body made of a magnetic shielding material between the voice coil motors for blocking a magnetic field in the shutter and a magnetic field in the voice coil motor to prevent a magnetic field in the shutter from being in the voice coil motor The magnetic fields interfere with each other and the barrier is fixed relative to the shutter and the fixed assembly of the voice coil motor.

Compared with the prior art, the voice coil motor of the camera module provided by the invention has a small volume and a simple structure, and the shutter is also a small-sized, relatively simple electromagnetic shutter, thereby enabling the digital camera having the camera module. The volume is small, the structure is relatively simple, and the camera module has a blocking body, so that the magnetic field in the voice coil motor in the camera module does not interfere with the magnetic field in the electromagnetic shutter.

10, 10b, 10c‧‧‧ camera module

12, 12a, 12b, 12c‧‧‧ Barrier

142‧‧‧Base

14, 14a, 14b, 14c‧‧‧ electromagnetic shutter

16, 16b, 16c‧‧‧ voice coil motor

124, 182b, 192c‧‧‧ board

126, 1652, 1921c‧‧‧ through holes

1242, 1224a‧‧‧ first surface

1244‧‧‧ second surface

1246, 1226a‧‧‧ first fixed unit

1248‧‧‧Second fixed unit

1422‧‧‧Lighting hole

1424, 142a‧‧‧ third fixed unit

163‧‧‧Fixed group

164‧‧‧Activity Pack

165‧‧‧Shrap

1631‧‧‧Retaining frame

1632‧‧‧ magnet

1633‧‧‧First accommodation chamber

1634‧‧‧

1635, 1635b‧‧‧ fourth fixed unit

1641‧‧‧ activities cartridge

1642‧‧‧ coil

1643‧‧‧Second accommodating chamber

1644‧‧‧First positioning column

1651‧‧‧ tablet

1653‧‧‧Front frame

1654‧‧‧ inside frame

1655‧‧‧Flexing Department

1656‧‧‧Positioning holes

1657‧‧‧ Notch

122a‧‧‧floor

124a, 184b, 194c‧‧‧ first side panel

126a, 186b, 196c‧‧‧ second side panel

128a, 188b, 198c‧‧‧ accommodating space

18b, 18c‧‧‧ first barrier tube

189b, 199c‧‧‧ open end

1824b‧‧‧ third surface

1826b‧‧‧Fixed fixed unit

19c‧‧‧second barrier

1 is a schematic diagram showing the combination of a camera module according to a first embodiment of the present invention.

2 is an exploded perspective view of the camera module of the first embodiment of the present invention.

3 is an exploded perspective view of a camera module according to a second embodiment of the present invention.

4 is a schematic diagram of the combination of the camera modules of the third embodiment of the present invention.

FIG. 5 is an exploded perspective view of a camera module according to a third embodiment of the present invention.

Figure 6 is a schematic diagram showing the combination of the camera modules of the fourth embodiment of the present invention.

FIG. 7 is an exploded perspective view of a camera module according to a fourth embodiment of the present invention.

Please refer to FIG. 1 and FIG. 2 together, which is a camera module 10 according to a first embodiment of the present invention. The camera module 10 includes a barrier body 12, an electromagnetic shutter 14 having a base 142, and a voice coil motor 16. The barrier body 12 is located between the electromagnetic shutter 14 and the voice coil motor 16 and is fixed to the electromagnetic shutter 14 and the voice coil motor 16 .

The barrier body 12 is for preventing the magnetic field in the electromagnetic shutter 14 from interfering with the magnetic field in the voice coil motor 16, and can be made of a magnetic shielding material such as a nickel-iron alloy, a conductive plastic, a surface conductive material, or a conductive glass. The barrier body 12 has a plate body 124. A through hole 126 is defined in the center of the plate body 124. The through hole 126 allows light entering the electromagnetic shutter 14 to pass through the barrier body 12 into the voice coil motor 16. The plate body 124 has a first surface 1242 and a second surface 1244 opposite the first surface 1242. The first surface 1242 is opposite to the base 142 of the electromagnetic shutter 14 and is provided with four first fixing units 1246. The second surface 1244 is opposite the voice coil motor 16 and is provided with four second fixing units 1248. In this embodiment, the first fixing unit 1246 is a cylinder extending in a direction parallel to a central axis of the through hole 126, and the second fixing unit 1248 is parallel to the through hole 126. A groove extending in the direction of the mandrel.

Of course, the first fixing unit 1246 can also be other columns such as a triangular prism, a quadrangular prism or a pentagonal prism. Of course, the first fixing unit 1246 can also be a groove or a through hole.

Of course, the second fixing unit 1248 can also be a column.

The base 142 of the electromagnetic shutter 14 has a light through hole 1422. The light-passing aperture 1422 allows light entering the electromagnetic shutter 14 to pass through the base 142 into the voice coil motor 16. The base 142 is further provided with a third fixing unit 1424 for use with the first fixing unit 1246 to fix the electromagnetic shutter 14 and the blocking body 12 integrally. In this embodiment, the third fixing unit 1424 is a circular groove. Of course, the third fixing unit 1424 can also be a through hole.

Of course, the light can also pass through the voice coil motor 16 first, then through the barrier body 12, and finally through the electromagnetic shutter 14 into the image sensor (not shown).

The voice coil motor 16 can drive a lens barrel (not shown) in the camera module 10 to move along a central axis of the lens barrel. The voice coil motor 16 includes a fixed assembly 163 that is open at both ends, and a movable assembly 164 that is movably received in the fixed assembly 163 and open at both ends, and two are respectively located at the two ends of the movable assembly 164. Flat shrapnel 165.

The fixed assembly 163 has a fixing frame 1631 and four magnets 1632 mounted in the fixing frame 1631. The fixing frame 1631 is a frame body having a rectangular parallelepiped shape. The four square side walls of the fixing frame 1631 define a first accommodating cavity 1633 for receiving the movable assembly 164. The intersection of the two side walls forms An rib 1634 is provided such that the holder 1631 has four ribs 1634. The four ribs 1634 of the fixing frame 1631 extend toward the bottom of the fixing frame 1631 along the central axis direction of the fixing frame 1631 to form four fourth fixing units 1635, and four fourth fixing units 1635 are formed to extend toward the top of the fixing frame 1631. The fourth fixing unit 1635 is used to position and fix the fixing frame 1631 and the flat elastic piece 165. In this embodiment, the fourth fixing unit 1635 is a cylinder.

Of course, the fourth fixing unit 1635 can also be a circular hole, and the number of the fourth fixing unit 1635 can also be two, three or more.

It can be understood that the fourth fixing unit 1635 can also be separately formed, and then fixed to the fixing frame 1631 by other bonding methods such as gluing, screwing, and the like. It is also understood that the fixing frame 1631 may also have no fourth fixing unit 1635.

The activity assembly 164 is movably mounted in the first receiving cavity 1633 of the fixed assembly 163. The activity assembly 164 has a movable barrel 1641 and a coil 1642 that surrounds the outer wall of the movable barrel 1641. The movable barrel 1641 is a square structure having a second circular receiving cavity 1643. The second accommodating cavity 1643 is for accommodating a lens barrel (not shown). The sidewall of the second accommodating cavity 1643 extends in a direction parallel to the central axis of the movable package 1641 to form eight first positioning posts 1644. Four of the eight first positioning posts 1644 are evenly distributed on the top of the movable loading tube 1641, and four are evenly distributed on the bottom of the movable loading tube 1641 for positioning and fixing with the flat elastic piece 165.

It can be understood that the first positioning post 1644 can also be separately formed, and then fixed to the movable loading tube 1641 by other bonding methods such as gluing, screwing, and the like.

The flat elastic piece 165 has a square flat plate 1651. The geometric center of the flat plate 1651 defines a through hole 1652 through which light can pass through the flat elastic piece 165.

The plate 1651 has a frame 1653 away from the through hole 1652, an inner frame 1654 adjacent to the through hole 1652, and four elastic portions 1655 surrounding the through hole 1652 and located between the outer frame 1653 and the inner frame 1654. .

The outer frame 1653 also has four positioning holes 1656 for use with the fourth fixing unit 1635. The positioning hole 1656 cooperates with the fourth fixing unit 1635 to position and fix the flat elastic piece 165 and the fixing frame 1631. In order to make the fixing to the fixing frame 1631 more secure, it is also possible to dispense between the positioning hole 1656 and the fourth fixing unit 1635.

The inner frame 1654 is provided with four recesses 1657 opening toward the through hole 1652. The notch 1657 cooperates with the first positioning post 1644 to position and secure the flat elastic piece 165 and the movable charging tube 1641. In order to make the fixing of the movable barrel 1641 more secure, it is also possible to dispense between the notch 1657 and the first positioning post 1644.

When assembling, the magnet 1632 is first mounted on the fixing frame 1631 to form the fixed assembly 163, and then the movable assembly 164 is placed in the first receiving cavity 1633 of the fixed assembly 163, and the two elastic pieces 165 are framed. 1653 and inner frame 1654 are respectively fixedly integrated with both ends of the fixed assembly 163 and the movable assembly 164 to form a voice coil motor 16 , and the fourth fixing unit 1635 and the barrier body 12 of the voice coil motor 16 The cooperation of the two fixing units 1248 fixes the fixing frame 1631 of the assembled voice coil motor 16 and the blocking body 12 integrally, and finally the first of the blocking body 12 The fixing unit 1246 cooperates with the third fixing unit 1424 of the electromagnetic shutter 14 to fix the barrier body 12 and the electromagnetic shutter 14 integrally.

Of course, the barrier body 12 and the electromagnetic shutter 14 can be fixedly integrated by the cooperation of the first fixing unit 1246 of the blocking body 12 and the third fixing unit 1424 of the electromagnetic shutter 14 , and then The fixing frame 1631 of the assembled voice coil motor 16 is fixedly integrated with the barrier body 12.

The camera module 10 has a barrier body 12, an electromagnetic shutter 14 and a voice coil motor 16, and the electromagnetic shutter 16 and the voice coil motor 16 are small in size and simple in structure, so the volume of the camera module 10 is small. Smaller and simpler in structure. At the same time, the barrier body 12 can prevent the magnetic field in the electromagnetic shutter 14 from interfering with the magnetic field in the voice coil motor 16, so that the camera module 10 can be lifted before the volume is small and the structure is simple, and the performance is better.

Referring to FIG. 3, a blocking body 12a and an electromagnetic shutter 14a of a camera module (not shown) according to a second embodiment of the present invention are provided. The barrier body 12a has a cylindrical structure and has a central opening. a bottom plate 122a of the hole and two first side plates 124a disposed on opposite sides of the bottom plate 122a and two second side plates 126a disposed on opposite sides of the plate body 124a, the bottom plate 122a and the first side plate 124a and the second side plate The 126a defines a receiving space 128a. The bottom plate 122a of the blocking body 12a has a first surface 1224a. The first surface 1224a is provided with a first fixing unit 1226a. The electromagnetic shutter 14a has a first fixing unit 1226a. The third fixing unit 142a is configured such that the electromagnetic shutter 14a is housed in the accommodating space 128a of the barrier body 12a, and is integrally fixed to the barrier body 12a.

Please refer to FIG. 4 and FIG. 5 , which are a camera module 10 b according to a third embodiment of the present invention. The camera module 10 b is substantially the same as the camera module 10 and has a plate-shaped blocking body 12 b , an electromagnetic shutter 14 b and a voice coil motor 16 b . The difference is that the camera module 10b further has a first blocking tube 18b for better preventing the magnetic field in the voice coil motor 16b from interfering with the magnetic field in the electromagnetic shutter 14b, which can be made of nickel-iron alloy The first barrier tube 18b has a cylindrical structure, and has a plate body 182b with a through hole at the center and two oppositely disposed on the plate body 182b. The first side plate 184b on both sides and the second side plate 186b disposed on the opposite sides of the plate body 182b, the plate body 182b and the first side plate 184b and the second side plate 186b form a receiving space 188b and a plate body The plate 182b has a third surface 1824b opposite to the open end 189b, and the third surface 1824b is provided with a fifth fixing unit 1826b. At this time, the fourth fixing unit 1635b of the voice coil motor 16b cooperates with the fifth fixing unit 1826b, so that the voice coil motor 16b is received in the receiving space 188b of the first blocking cylinder 18b, and with the first blocking cylinder 18b. The open end 189b of the first barrier tube 18b in which the voice coil motor 16b is housed is integrally fixed to the barrier body 12b.

Of course, the plate body 182b may also have no through holes.

Referring to FIG. 6 and FIG. 7 , a camera module 10 c according to a fourth embodiment of the present invention is substantially the same as the camera module 10 b , and has a plate-shaped blocking body 12 c , an electromagnetic shutter 14 c , and a voice coil motor 16 c . And a first blocking tube 18c, wherein the camera module 10c further has a second blocking barrel 19c substantially identical to the first blocking barrel 18c for better preventing the electromagnetic shutter 14c from being The magnetic field affects the operation of other components, and can be made of a magnetic mask material such as a nickel-iron alloy, a conductive plastic, a surface conductive material, a conductive glass, etc., and the second barrier cylinder 19c has a cylindrical structure with a central opening for a plate body 192c passing through the through hole 1921c and two first side plates 194c disposed on opposite sides of the plate body 192c and two second side plates 196c disposed on opposite sides of the plate body 192c, the plate body 192c The first side plate 194c and the second side plate 196c form a receiving space 198c and an open end 199c opposite to the plate body 192c. At this time, the electromagnetic shutter 14c is housed in the second barrier cylinder 19c, and the open end 199c of the second barrier cylinder 19c is integrally formed with the barrier body 12c. Of course, the electromagnetic shutter 14c can also be fixedly integrated with the second barrier cylinder 19c.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. 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‧‧‧ camera module

12‧‧‧Barrier

142‧‧‧Base

14‧‧‧Electromagnetic shutter

16‧‧‧ voice coil motor

124‧‧‧ board

126, 1652‧‧‧through holes

1242‧‧‧ first surface

1244‧‧‧ second surface

1246‧‧‧First fixed unit

1248‧‧‧Second fixed unit

1422‧‧‧Lighting hole

1424‧‧‧ third fixed unit

163‧‧‧Fixed group

164‧‧‧Activity Pack

165‧‧‧Shrap

1631‧‧‧Retaining frame

1632‧‧‧ magnet

1633‧‧‧First accommodation chamber

1634‧‧‧

1635‧‧‧Four fixed unit

1641‧‧‧ activities cartridge

1642‧‧‧ coil

1643‧‧‧Second accommodating chamber

1644‧‧‧First positioning column

1651‧‧‧ tablet

1653‧‧‧Front frame

1654‧‧‧ inside frame

1655‧‧‧Flexing Department

1656‧‧‧Positioning holes

1657‧‧‧ Notch

Claims (8)

A camera module includes: an electromagnetic shutter having a base; a voice coil motor having a fixed assembly with open ends and an activity movably received in the fixed assembly and opening at both ends a magnetic field blocking body made of a magnetic mask material between the shutter and the voice coil motor for blocking a magnetic field in the shutter and a magnetic field in the voice coil motor to prevent the shutter from being The magnetic field interferes with the magnetic field in the voice coil motor, and the magnetic field blocking body is fixed with respect to the fixed assembly of the shutter and the voice coil motor; and the first blocking tube has a plate body and two plates disposed on the plate a first side plate on opposite sides of the body and two second side plates disposed on opposite sides of the plate body, the plate body forming a receiving space with the first side plate and the second side plate and a opposite to the plate body An open end of the first blocking tube is configured to receive the voice coil motor, and the fixed assembly of the voice coil motor is fixed relative to the first blocking tube, and the open end of the first blocking tube and the magnetic field blocking body Secured as one. The camera module of claim 1, wherein the barrier body is a plate body having a through hole in the center, the barrier body has a first surface, and the first surface is opposite to the base of the shutter. And the barrier body is fixedly integrated with the base of the shutter. The camera module of claim 2, wherein the first surface is provided with at least two first fixing units, and the base of the shutter is provided with a second fixing sheet And the second fixing unit cooperates with the first fixing unit to fix the blocking body and the shutter. The camera module of claim 3, wherein the first fixing unit is a fixing hole or a fixing pin, and the second fixing unit is a fixing pin or a fixing hole. The camera module of claim 1, wherein the barrier body has a plate body having a through hole in the center and two first side plates of the barrier body disposed on opposite sides of the plate body of the barrier body. And a second side plate of the barrier body disposed on the opposite sides of the plate body of the barrier body, the plate body of the barrier body and the first side plate of the barrier body and the second side plate of the barrier body form a barrier body The accommodating space is received in the accommodating space of the barrier body and is fixedly integrated with the blocking body. The camera module of claim 2, wherein the barrier body further has a second surface opposite to the fixed assembly, the second surface is provided with at least two third fixing units, a fourth fixing unit is disposed on an end surface of the fixing assembly opposite to the second surface of the blocking body, and the fourth fixing unit cooperates with the third fixing unit to fix the fixing assembly and the blocking body into one body . The camera module of claim 6, wherein the third fixing unit is a fixing pin or a fixing groove, and the fourth fixing unit is correspondingly a fixing groove or a fixing pin. The camera module of claim 1, further comprising a second barrier tube having a second blocking tube having a central opening and two spacers disposed on the second blocking barrel Second blocking cylinder on opposite sides of the plate body a first side plate and two second side plates of the second blocking tube disposed on the opposite sides of the second blocking tube, the second blocking tube body and the first side plate of the second blocking tube And the second side plate of the second blocking tube forms a receiving space and an opening end opposite to the plate body of the second blocking tube, the receiving space of the second blocking tube is used for receiving the shutter, and the second blocking tube is The open end is fixedly integrated with the barrier body.