CN101661209A - Camera module and electronic device including the same - Google Patents

Abstract

A camera module 1 of the present invention includes a moving magnet type mechanical shutter 2 and a lens unit 3 (lens drive section) for driving a lens by electromagnetic force. A magnetic field for driving the lens is set so that a light path is closed by a shutter fin while a magnetic field leaked from the lens unit 3 is acting on a drive mechanism of the mechanical shutter 2. With the configuration, the leak magnetic field leaked from the lens unit 3 causes the light path to be closed at a faster speed by the shutter fin of the mechanical shutter 2. Accordingly, generation of a smear can beprevented by the camera module including the lens drive section and the moving magnet type mechanical shutter, which are driven by the electromagnetic force.

Description

Camera model and the electronic equipment that possesses this camera model

Technical field

The present invention relates to a kind of camera model on the electronic equipment such as portable phone and electronic equipment that possesses this camera model of being equipped on, relate in particular to a kind of be equipped with moving-magnetic type mechanical shutter and electromagnetic drive type (VCM mode) lens drive division, can implement to prevent camera model of hangover (smear) measure and the electronic equipment that possesses this camera model.

Background technology

For example, using CCD (charge: in camera model Charge CoupledDevices), a kind of phenomenon of so-called hangover can take place usually as imaging apparatus." hangover " be meant, in target object to be taken, when including high light such as sunshine or light and being incident to imaging apparatus, above-mentioned high light will cause occurring the phenomenon of white band-like portions on photographic images.In CCD, the appearance of this conditions of streaking causes owing to successional electric charge overflows.Particularly, the photo detector of CCD (pixel) is when receiving high light, and a part of photo detector generation electric charge overflows.Its result, when mobile, the electric charge that can cause linksystem overflows electric charge, causes the generation of trailing between photo detector.

For fear of the generation of this conditions of streaking, on the camera model of being everlasting mechanical shutter is installed.Can before trailing, block the high light that causes hangover by mechanical shutter, thereby prevent hangover.

For example, disclosed the structure of the mechanical shutter that is used for camera model in the patent documentation 1～3.Fig. 9 is the sectional view of the camera model that is disclosed in the patent documentation 1.Figure 10 is the sectional view of the mechanical shutter that is disclosed in the patent documentation 2.Figure 11 is the planimetric map of the mechanical shutter that is disclosed in the patent documentation 3.

Particularly, as shown in Figure 9, the camera model 110 that patent documentation 1 disclosed has the light-passing board 112, image pickup optical system 113, imaging apparatus 114, substrate 115, blade 116 and 117 etc. of stacked setting on its optical axis direction.In addition, in the side of image pickup optical system 113, also be provided with the shutter actuator 118 that is used for electromagnetic driving optical shutter blade 116,117.

As shown in figure 10, the camera model that patent documentation 2 is disclosed has the recess 121 that is arranged at its central portion with mechanical shutter 120, and the drive member 126 and 127 of disperseing to be arranged on recess 121 both sides, drive member 126 and 127 is used to drive a plurality of blades 122 and 123, aperture blades 124, auxiliary blade 125.But patent documentation 2 does not offer some clarification on the configuration structure of image pickup optical systems such as imaging lens system.

In addition, the camera model that disclosed of patent documentation 3 is as follows with the principle of work of mechanical shutter.That is, as shown in figure 11, in mechanical shutter 130, rotation is mounted with rotor 133 possibly on the axle 132 of shutter base plate 131.And this rotor 133 is the permanet magnet of the two poles of the earth band magnetic.That is, mechanical shutter 130 is, is the moving-magnetic type mechanical shutter of drive source with rotor (permanet magnet) 133.And mechanical shutter 130 has the bar 134 that roughly is the U word shape, and the leading section of two shank 134a, 134b of bar 134 is a magnetic pole piece.And, be arranged with the reel 136 of winding around 135 on the shank 134b.

In this mechanical shutter 130, when aliving on the coil 135, the magnetic field that coil 135 is produced can affact on the magnetic pole piece ( shank 134a, 134b).Act on the magnetic field of magnetic pole piece, by rotor 133 is used for rotor 133.At this moment, blade (not shown) and rotor 133 rotation interlocks promptly also are rotated, thereby can open and close the peristome 137 that is positioned at central authorities.In addition, according to the direction of current that flows into coil 135, the magnetic direction that affacts on the rotor 133 can reverse.As a result, by affacting the magnetic field on the rotor 133, rotor 133 can be rotated in a clockwise direction or counterclockwise.

In recent years, on portable phone, adopt the example of camera model more and more with automatic focus function.This automatic focus function realizes by carry lens driver on camera model.Lens driver include VCM (voice coil motor: Voice Coil Motor) formula, step motor formula, utilize the types such as drive-type of piezoelectric element, it is of a great variety, and circulates on market.

For example, patent documentation 4 has disclosed a kind of lens driver of VCM formula.Figure 12 is the sectional view of the lens driver that disclosed in the patent documentation 4.Lens driver 200 shown in Figure 12 has the retainer 202 that is mounted with lens 201 in the central, and the upper and lower part of this retainer 202 is provided with leaf spring 203U, 203L respectively.Thus, retainer 202 keeps lens 201, makes lens 201 to move on optical axis direction.

In addition, be fixed with coil 204 on the flange part (flange) of retainer 202, this coil 204 is contained in the bar 205.The medial surface of bar 205 is provided with permanet magnet 206, and this permanet magnet 206 is relative with above-mentioned coil 204 positions and keep certain intervals between the two.According to this structure, lens driver 200 can carry out electromagnetic force and drive.

In addition, be formed with 3 projections 208 on the base (base) 207.Under the state of assembling lens driving device 200, each projection 208 will play the maintenance effect to retainer 202.

Guard shield 209 is set at the top of bar 205.Be formed with opening 210,211 on the central portion of the central portion of guard shield 209 and base 207 respectively.Opening 210,211 forms for light is therefrom seen through.

Yet, in the camera model of the lens driver of mechanical shutter with moving-magnetic type and VCM formula, conditions of streaking be inevitable.

Specifically, as mentioned above, the mechanical shutter 130 of Figure 11 is to form the magnetic field that affacts magnetic pole piece by switching on for coil 135, and comes rotor 133 with this magnetic field.Afterwards, interlock is carried out in the rotation of blade and rotor 133, thereby opens and closes opening (light path) 137.

But, in camera model, except mechanical shutter 130, also being provided with the lens driver 200 of VCM formula, the drive source of mechanical shutter 130 and lens driver 200 is electromagnetic force.Therefore, the magnetic field of leaking from lens driver 200 also can affact on the mechanical shutter 130.As a result, harmful effect is caused to the action of mechanical shutter 130 in the magnetic field of leakage.

Say that more specifically in mechanical shutter shown in Figure 11 130, can work to magnetic pole piece in the magnetic field 138 that the leading section from the leading section of shank 134b to shank 134a forms.Mechanical shutter 130 is used for preventing by the high light of blocking-up initiation conditions of streaking the generation of conditions of streaking.Therefore, set magnetic field 138, make, block the light that causes conditions of streaking with this by in coil 135, flowing into the predetermined electric current amount and operating blade with the speed of regulation.

Yet the magnetic field of leaking from lens driver 200 can influence magnetic field 138.Thus, mechanical shutter 130 can't be realized normal function, and the closing motion of being closed opening 137 by blade also can become slow.Thereby there is the problem that can't prevent conditions of streaking.

Patent documentation 1: international open WO2005/036251 communique, open day: on April 21st, 2005.

Patent documentation 2: the patented claim Publication Laid-Open 2007-316477 of Japan communique, open day: on Dec 6th, 2007.

Patent documentation 3: the patented claim Publication Laid-Open 2007-174795 of Japan communique, open day: on July 5th, 2007.

Patent documentation 4: the patented claim Publication Laid-Open 2006-050693 of Japan communique, open day: on February 16th, 2006.

Summary of the invention

The present invention is in view of the above problems and exploitation, and its purpose is to be provided at that to have with the electromagnetic force be also can prevent camera model that conditions of streaking takes place and the electronic equipment that possesses this camera model under the situation of the lens drive division of drive source and moving-magnetic type mechanical shutter.

To achieve these goals, camera model of the present invention comprises the lens drive division, shutter portion and imaging apparatus, wherein, the said lens drive division is used for driving the inner imaging lens system that keeps by electromagnetic force on optical axis direction, above-mentioned shutter portion controls the light quantity that is incident to above-mentioned imaging lens system by the blade that is used to block or open light path, above-mentioned imaging apparatus will become electric signal by the converting optical signals that above-mentioned imaging lens system received, this camera model is characterised in that: above-mentioned shutter portion has the moving-magnetic type drive member, and this moving-magnetic type drive member is by driving above-mentioned blade with the power-actuated permanet magnet of electromagnetism; Setting is used to drive the magnetic field of above-mentioned imaging lens system, makes the magnetic field of above-mentioned leakage to play the effect that above-mentioned blade is moved to the direction of blocking light path at the action of a magnetic field that is leaked by the said lens drive division under the situation of the drive member of above-mentioned shutter portion.

Camera model of the present invention have with the electromagnetic force be drive source, lens drive division and shutter portion.Therefore, at the permanet magnet of shutter portion, except magnetic field, also it is had an effect from the stray field of lens drive division from drive member.As a result, the action that blade opens and closes light path also will be under some influence, and have the possibility that conditions of streaking takes place.

But according to the present invention, set the magnetic field be used to drive imaging lens system, make that the effect of this stray field helps to make the motion of blade to the direction of blocking-up light path when the stray field from the lens drive division affacts on the drive member of shutter portion.Therefore, for blade, except magnetic field, also it is had an effect from the stray field of lens drive division from drive member.Thus, even from the lens drive division leakage magnetic field is arranged, its stray field also can play and help to make the effect of blade to the direction motion of blocking-up light path.In other words, this stray field plays the effect of quickening to the speed of blade blocking-up light path.Thereby, be the lens drive division and the shutter portion of drive source even camera model possesses with the electromagnetic force, also can prevent the generation of conditions of streaking.

In addition, the direction in direction and the magnetic field of leaking from the lens drive division that is used to drive the magnetic field of imaging lens system can be an equidirectional, also can be different directions.The direction in magnetic field can be used to produce the winding direction of the coil in magnetic field by change, the sense of current that flows through coil is implemented.

It is very clear that other purposes of the present invention, feature and advantage can become in the following description.In addition, come clear and definite advantage of the present invention with reference to accompanying drawing below.

Description of drawings

Fig. 1 is the stereographic map of a camera model of the present invention.

Fig. 2 is the sectional view at camera model shown in Figure 1.

Fig. 3 is mounted in the sectional view of the mechanical shutter in the camera model shown in Figure 1.

Fig. 4 is mounted in the lens unit in the camera model shown in Figure 1 and the sectional view of image unit.

Fig. 5 is mounted in the planimetric map of the mechanical shutter drive member in the camera model shown in Figure 1, and wherein (a) is the direction in the expression epitrochanterian magnetic field that acts on drive member and the planimetric map when identical from the direction of the stray field of lens unit; (b) be the direction of direction and the stray field of lens unit in the expression epitrochanterian magnetic field that the acts on drive member planimetric map when opposite.

Fig. 6 is expression by being installed in mechanical shutter in the camera model shown in Figure 1 at the blocking-up curve map of the shut-in time during light path, and wherein (a) is the direction of direction and the stray field of lens unit in the expression epitrochanterian magnetic field that the acts on drive member curve map when identical; Curve map when (b) to be the expression epitrochanterian magnetic field that acts on drive member opposite with the direction of the stray field of lens unit.

Fig. 7 is the sectional view that is illustrated in the state when lens move to the extreme higher position in the camera model shown in Figure 1.

Fig. 8 is the sectional view of another camera model of the present invention.

Fig. 9 is the sectional view of the camera model of patent documentation 1.

Figure 10 is the sectional view of the mechanical shutter of patent documentation 2.

Figure 11 is the planimetric map of the mechanical shutter of patent documentation 3.

Figure 12 is the sectional view of the lens driver of patent documentation 4.

Figure 13 is the sectional view of other camera models of the present invention.

Figure 14 is the sectional view of other camera models of the present invention.

Embodiment

Below, with reference to accompanying drawing embodiments of the present invention are described.

Fig. 1 is the stereographic map with camera model of lens driver of the present invention.Fig. 2 is the sectional view with camera model of lens driver of the present invention.

As shown in Figure 1, the camera model 1 of present embodiment has the 3-tier architecture that stacks gradually mechanical shutter (shutter portion) 2, lens unit (lens drive division) 3, image unit 4 and form on optical axis direction.In addition, in the camera model 1 of present embodiment, as shown in Figure 2, be provided with magnetic shield panel 5 between mechanical shutter 2 and the lens unit 3.Below, for convenience of explanation, mechanical shutter 2 places one side is made as the top; Image unit 4 places one side is made as the below.

＜mechanical shutter 2 〉

Fig. 3 is the sectional view of expression mechanical shutter 2, and wherein, the state of light path is opened in last figure expression, and figure below represents to block the state of light path.Mechanical shutter 2 carries out ON/OFF control with moving-magnetic type to the incident light in the imaging lens system that incides lens unit 3.That is, mechanical shutter 2 light that causes trailing by blocking-up prevents the generation of conditions of streaking.

Specifically, the central portion at the back side of mechanical shutter 2 (at the face of lens unit 3 one sides) is formed with recess 21.Be provided with a plurality of (among Fig. 3 being 2) blades 22,23 in the both sides of this recess 21 and be used to drive the drive member 24,25 of blade 22,23.

Blade 22,23 and drive member 24,25 are accommodated and are fixed in the basket 26 of hollow.This basket 26 itself has the structure that is formed with recess 21 at its back side central portion.In addition, in order to prevent purposes such as foreign matter intrusion, be provided with lid 26a at the end face of basket 26.

In order to make light transmission and to guarantee its light path (dot-and-dash line among the figure), at the central portion formation opening 27 of basket 26.Similarly, in order to ensure light path, on blade 22,23, also form opening 28,29.When drive member 24,25 was driven, blade 22,23 was an axle with this drive member 24,25, rotated (shaking) on perpendicular to the face of light path.Then, shown in the last figure among Fig. 3, when the opening on opening on the basket 26 27 and the blade 22,23 28,29 was overlapped, light path was open-minded.Thus, Wai Bu light will incide lens unit 3 by mechanical shutter 2.

On the other hand, shown in the figure below among Fig. 3, when opening on opening 27 on the basket 26 and the shutter 22,23 28,29 is not overlapping, outside light will be blocked and can not incide lens unit 3.Like this, mechanical shutter 2 carries out ON/OFF control by driving blade 22,23 to the light that will be incident to lens unit 3.

In addition, blade 22,23 not only is defined in the structure with opening 28,29, also can be following structure.That is, itself be positioned at the position of blocking-up light path or be positioned at the position of opening light path, the light that be incident to lens unit 3 is carried out the structure of ON/OFF control according to blade 22,23.

And (neutral density: optical filter Neutral Density) can obtain the structure to having or not filtering functions to switch by in the blade 22,23 any one is replaced as ND.And blade 22,23 and ND optical filter sum are not limited in 2, also can be more than 1 or 3.

Structure for drive unit 24,25 will describe in detail in the back.In addition, in the present embodiment, on the whole back side of mechanical shutter 2 (basket 26) magnetic shield panel 5 is installed.

＜lens unit 3 〉

Below, lens unit 3 is described.Fig. 4 is the sectional view of expression lens unit 3 and image unit 4.Lens unit 3 is the image pickup optical systems that are used to form the subject body image.That is, lens unit 3 causes outer light guide on the sensitive surface (shooting face) of image unit 4.The drive division that lens unit 3 is included in movable movable part on the optical axis direction, movable part is contained in resettlement section wherein and movable part is moved.

Particularly, as shown in Figure 4, the structure of lens unit 3 is: lens keep the internal fixation of body 33 that lens drum 32 is arranged, the inside of this lens drum 32 maintains a plurality of lens (imaging lens system) 31, and the parts with this position relation are housed in by in base 39, bar 34 and the guard shield 35 formed spaces.In the present embodiment, the lens drum 32 that a plurality of lens 31 are installed being fixed on lens keeps on the body 33.In addition, can keep body 33 wherein one squarely to become external thread, form internal thread, make it possible to adjust lens drum 32 keeps body 33 with respect to lens height the opposing party at lens drum 32 and lens.

Lens drum 32 is the frameworks that are used for the lens 31 of portion's maintenance within it.The lens drum 32 that lens keep body 33 will maintain lens 31 remains on its inside.Lens 31 are positioned at the central portion of lens drum 32 and lens maintenance body 33.Lens drum 32 and lens keep body 33 to be hollow (tubular) parts.

As described below, be formed with teat 31a at the leading section (leading section of lens 31 and lens drum 32) of lens 31, this teat 31a also will give prominence to than the end face (upper surface of guard shield 35) of lens unit 3, and is housed in the recess 21 of above-mentioned mechanical shutter 2.

In addition, as described below, lens 31, lens drum 32 and lens keep body 33 to move on optical axis direction, and constitute movable part.This movable part is housed in the resettlement section.Particularly, this resettlement section is made of base 39, bar 34 and guard shield 35.Base 39 constitutes the bottom of lens unit 3.That is, base 39 is positioned at the light exit side of lens unit 3.

Bar 34 is parts of tubular, constitutes the side surface part of lens unit 3.Bar 34 portion is within it accommodated movable part, and bar 34 is fixed on the base 39.In the present embodiment, above bar 34, be provided with guard shield 35.Guard shield 35 constitutes the top (end face) of lens unit 3.In addition, bar 34 itself also can play the effect of guard shield, therefore also can omit guard shield 35.In the case, the diameter of opening 35a is the internal diameter of bar 34.

The central portion of base 39 is formed with opening 39a.And the central portion of guard shield 35 also is formed with opening 35a.Opening 39a and opening 35a are the openings that forms for energy transmissive, and are formed on the optical axis direction.As mentioned above, in the resettlement section,, form opening 35a and form opening 39a at light exit side at light incident side in order to ensure the light path on the optical axis direction.Therefore, lens 31, lens drum 32 and lens keep the part of body 33 to expose from this peristome 35a.

The drive division of lens unit 3 has coil 36 and the permanet magnet 37 that drives lens 31 with electromagnetic force on optical axis direction.In present embodiment, give coil 36 logical powering on to fail to be convened for lack of a quorum produce magnetic fields, this action of a magnetic field then can be driven lens 31 (lens maintenance body 33) during to permanet magnet 37 on optical axis direction.Coil 36 is fixed on lens and keeps on the flange part of body 33.Coil 36 is extended to light incident side (opening 35a side).And at the magnetic loop that the medial surface setting of bar 34 is made of permanet magnet 37, it is mutually opposed with coil 36.

In the related lens unit 3 of present embodiment, lens keep the above and below (that is, end face and bottom surface) of body 33 to be provided with leaf spring 38a, 38b.Leaf spring 38a, 38b are to press section that light exit side is pushed with movable part.Leaf spring 38a, 38b have spiral-shaped.When being provided with, the end of each leaf spring 38a, 38b is fixed on the movable part, the other end is fixed on the resettlement section and gets final product.In the present embodiment, the end of leaf spring 38a, 38b is fixed on bar 34 or the base 39, and the other end is fixed on lens and keeps on the body 33.Leaf spring 38a, 38b keep lens maintenance body 33 auxiliaryly and it are moved on optical axis direction based on its elasticity.

＜image unit 4 〉

Below, the structure of image unit 4 is described.As shown in Figure 4, being located at the image unit 4 of the bottom surface side of lens unit 3, is the image pickup part that lens unit 3 formed subject body images is transformed into electric signal.That is, image unit 4 is the sensor elements that the light from lens unit 3 incidents carried out light-to-current inversion.

And as shown in Figure 4, the wiring substrate 41 of image unit 4 is provided with solid-state imager 42.Solid-state imager 42 is incorporated in the maintenance seat of being located on the wiring substrate 41 43.Keep the top of seat 43 to be provided with the transparent member 44 that can cover solid-state imager 42.In the present embodiment, in design, the downside that keeps seat 43 is that both contact with wiring substrate 41 and solid-state imager 42.But owing to keep the dimensional tolerence of seat 43, the downside situation about contacting with solid-state imager 42 of seat 43 also may appear keeping in the situation that may occur keeping the downside of seat 43 only contact with wiring substrate 41.

Wiring substrate 41 is the substrates with graphical distribution (not shown).By distribution, wiring substrate 41 and solid-state imager 42 are electrically connected mutually.For example, wiring substrate 41 is printed base plate, ceramic substrate etc.

Solid-state imager 42 will be transformed into electric signal by formed subject body image in lens unit 3.That is, solid-state imager 42 is sensor elements that converting optical signals that the lens 31 with scioptics unit 3 are received becomes electric signal.For example, solid-state imager 42 is CCD or cmos sensor IC.Also have, the surface of solid-state imager 42 (top) is formed with sensitive surface (not shown), and a plurality of pixels are configured to rectangular on this sensitive surface.This sensitive surface is an imaging region, and the light of scioptics unit 3 incidents carries out imaging at this imaging region, so, also be referred to as pixel region.

The subject body image that solid-state imager 42 will image on the sensitive surface (pixel region) is transformed into electric signal, and exports as analog picture signal.That is, on sensitive surface, carry out light-to-current inversion.The action of solid-state imager 42 is by not shown DSP (digital signal processor: digital signal processor) control, and the picture signal that solid-state imager 42 is generated is also handled by DSP.

And the transparent member 44 that constitutes with glass etc. covers the sensitive surface of solid-state imagers 42.In the present embodiment, be formed with infrared ray on the surface of transparent member 44 and remove film (IR removes film).Therefore, transparent member 44 has the ultrared function of blocking-up.

＜magnetic shield panel 5 〉

Below, magnetic shield panel 5 is described.In the camera model 1 of present embodiment,, be provided with magnetic shield panel 5 in order to adjust from the size in the magnetic field that lens unit 3 leaks.Yet magnetic shield panel 5 is not to be parts indispensable in the camera model 1, and whether it is provided with preferred size according to the magnetic field of leaking from lens unit 3 and decides.

In addition, can wait thickness and the area of at random adjusting magnetic shield panel 5 according to the size of the magnetic field resistance of the size of the stray field of lens unit 3 and mechanical shutter 2 sides.Concrete formation to magnetic shield panel 5 will be described hereinafter.

As mentioned above, to have with the electromagnetic force be the mechanical shutter 2 and the lens unit 3 of drive source to the camera model 1 of present embodiment.Therefore, for mechanical shutter 2 (blade 22,23), except magnetic field, also it is had an effect from the stray field of lens unit 3 in addition from drive member 24,25.Its result, the light path on-off action that depends on blade 22,23 will be affected, and the possibility that conditions of streaking takes place is arranged.Particularly, in camera model 1, mechanical shutter 2 and lens unit 3 be stacked to be arranged on the optical axis direction and close mutually, thereby is subjected to the influence in magnetic field each other easily.Therefore, the possibility of generation conditions of streaking is higher.

Specifically, Fig. 5 is the planimetric map of drive member 24, direction that (a) among Fig. 5 expression affacts the magnetic field on the rotor 52 of drive member 24 and the state when identical from the direction of the stray field of lens unit 3, the state when (b) among Fig. 5 represents that the direction in above-mentioned magnetic field is opposite.Drive member 25 also has same structure.In addition, act on magnetic field and stray field on the rotor 52 of drive member 24 and be not limited to parallelly fully, also can have certain angle between the two from lens unit 3.

For drive member 24,25,, then there is not particular determination as long as can drive blade 22,23 with moving-magnetic type.For example, also can use the associated components of the prior art that is disclosed in above-mentioned patent documentation 3 (with reference to Figure 11) etc.

As shown in Figure 5, the drive member 24 of mechanical shutter 2 bar 53 and the coil 54 that by axle 51, with respect to axle 51 rotatable rotor 52, roughly are the U word shape constitutes.Rotor 52 is permanet magnets of the two poles of the earth band magnetic.Mechanical shutter 2 is to be the moving-magnetic type shutter of drive source with rotor (permanet magnet) 52.That is, drive member 24 is by driving blade 22 by the power-actuated rotor of electromagnetism (permanet magnet) 52.The front end of two shank 53a, 53b of bar 53 is a magnetic pole piece, and rotor 52 is folded between shank 53a, the 53b.Coil 54 is wrapped on the shank 53b.

Shown in Fig. 5 (a), in drive member 24, when flowing into the electric current of prescribed direction for coil 54, shown in arrow among the figure, to affact on the rotor 52 to the magnetic field 55 of shank 53a from shank 53b, and make rotor 52 to making blade 22 (with reference to Fig. 3) close the direction rotation of light path.At this moment, the stray field 56 from lens unit 3 is identical with the action direction in magnetic field 55.Thus, stray field 56 superposes and has an effect as bias magnetic field and magnetic field 55 from the magnetic pole piece of mechanical shutter 2 (drive member 24).That is, practical function is bigger than the magnetic field from drive member 24 of original effect to the magnetic field on the rotor 52.As a result, compared to situation about not having from the stray field 56 of lens unit 3, the closing velocity of being closed light path by blade 22 becomes faster.

On the other hand, open by blade 22 under the situation of light path (unlatching shutter), give coil 54 circulation backward currents, then can apply on the rotor 52 and the 55 rightabout magnetic fields, magnetic field shown in Fig. 5 (a).At this moment, from the stray field 56 of lens unit 3 and opposite to the action direction of rotor 52 with the 55 rightabout magnetic fields, magnetic field shown in Fig. 5 (a).Therefore, for from the magnetic pole piece of mechanical shutter 2 (drive member 24), with the 55 rightabout magnetic fields, magnetic field shown in Fig. 5 (a), are reverse bias magnetic fields from the stray field 56 of lens unit 3.That is, practical function is littler than the magnetic field from drive member 24 that should act on to the magnetic field on the rotor 52, from the magnetic field of drive member 24 is and the 55 rightabout magnetic fields, magnetic field shown in Fig. 5 (a).As a result, compared to situation about not having from the stray field 56 of lens unit 3, the closing velocity of being opened light path by blade 22 becomes slow.

Mechanical shutter 2 has blocking-up and causes the function that the high light that trails prevents that conditions of streaking from taking place.Consider this function, compared to the time of blocking-up light path, the importance degree of time of opening light path is low.That is,,, the speed of opening of light path slowly can not become too big problem even becoming if open the words (can open light path at least) that the action of light path itself does not have obstacle yet.

To this, shown in Fig. 5 (b), the direction of stray field 57 and the direction of the stray field 56 shown in Fig. 5 (a) are that compared to the situation that does not have stray field 57, the closing velocity of closing light path according to blade 22 can become slow under the opposite situation.That is, with respect to the magnetic field 55 from mechanical shutter 2 (drive member 24) magnetic pole piece, the stray field 57 of lens unit 3 plays the effect of reverse bias magnetic field.That is, the magnetic field that affacts on the rotor 52 is also littler than the magnetic field from drive member 24 of original effect.As a result, compared to situation about not having from the stray field 57 of lens unit 3, the speed of blocking light paths by blade 22 will become slow.Yet if light path blocking-up speed becomes slowly, mechanical shutter 2 prevents that the function that conditions of streaking takes place from will descend.Thereby, shown in Fig. 5 (b), do not wish to exist dysgenic stray field 57 take place for the light path shut-in time (light path blocking-up time) as one of important performance of mechanical shutter 2.In addition, compare with the situation shown in Fig. 5 (a), the light path service time shown in Fig. 5 (b) under the situation is faster.

In view of the above, in camera model 1, when the action of a magnetic field that leaks from lens unit 3 is on the drive member 24 of mechanical shutter 2, be used to drive the magnetic field of lens 31, make the direction action of blade 22 to the blocking-up light path by setting.That is, drive member 24 has the structure shown in Fig. 5 (a).Fig. 6 is a curve map of the on-off action of blade 22 being confirmed when being illustrated in drive member 24 and having structure shown in Fig. 5 (a) and Fig. 5 (b) resulting result.Wherein, the result the when result when the curve representation drive member 24 among Fig. 6 (a) has structure shown in Fig. 5 (a), the curve representation drive member 24 among Fig. 6 (b) have structure shown in Fig. 5 (b).Curve shown in Fig. 6 (a) and Fig. 6 (b) is respectively, act on the direction of the stray field 56,57 on the rotor 52 of mechanical shutter 2 when opposite each other, be the longitudinal axis, be transverse axis, the curve of expression both sides relation with the light path shut-in time with the size of stray field 56,57.

Shown in Fig. 6 (a), when drive member 24 had structure shown in Fig. 5 (a), along with the enhancing of stray field 56, the shut-in time of light path shortened.That is, the blocking-up speed of light path accelerates.In addition, in Fig. 6 (a) drafting scope, also can carry out the action of opening of light path.

To this, shown in Fig. 6 (b), when drive member 24 had structure shown in Fig. 5 (b), along with the enhancing of stray field 57, the shut-in time of light path was elongated.That is, the blocking-up speed of light path is slack-off.

Thus, drive member 24 have Fig. 5 (a) even shown in structure the time have a stray field 56 from lens unit 3, this stray field 56 can be to not causing harmful effect as the light path shut-in time of one of most important performance of mechanical shutter 2 yet.And, compare with the situation that does not have stray field 56, can accelerate the closing velocity of mechanical shutter 2 on the contrary.Thus, can realize the high performance of mechanical shutter 2 and even camera model 1.

As mentioned above, according to camera model 1, when the stray field from lens unit 3 affacts on the drive member 24,25 of mechanical shutter 2, be used to drive the magnetic field of lens 31 by setting, so that blade 22,23 is to the direction action of blocking-up light path.Therefore, not only be subjected to effect on the blade 22,23, also be subjected to effect from the stray field of lens unit 3 from the magnetic field of drive member 24,25.Therefore, even from lens unit 3 leakage magnetic field takes place, its stray field 56 also can help the blocking-up of light path.In other words, 56 pairs of closing velocities of closing light path by blade 22,23 of stray field play the effect of quickening.Thereby, concerning camera model 1, be the lens unit 3 and the mechanical shutter 2 of drive source even have with the electromagnetic force, conditions of streaking can not take place.

Moreover, because camera model 1 has lens unit 3, therefore, can realize focus adjustment function by mobile lens on optical axis direction 31.

And as shown in Figure 2, the camera model 1 of present embodiment has mechanical shutter 2 and the lens unit 3 stacked structures that are arranged on the optical axis direction.That is, lens unit 3 and mechanical shutter 2 that the position is set is adjacent.Thus, the stray field from lens unit 3 plays a role to mechanical shutter 2 easily.Therefore can prevent the generation of conditions of streaking more reliably.

Also have, in camera model 1, the permanet magnet 37 of lens unit 3 is having magnetic perpendicular to optical axis on direction (horizontal among the figure).Therefore, when having above-mentioned stepped construction, from the stray field of lens unit 3 drive member 24,25 to mechanical shutter 2, also on direction, play a role perpendicular to optical axis, in addition, the magnetic direction that is used for driving device shutter 2 is also identical with direction perpendicular to optical axis, thereby has formed the magnetic field that is easy to generate influence mutually.Thus, in camera model 1,, also can prevent the generation of conditions of streaking reliably even be subjected to the influence in magnetic field.

As mentioned above, in camera model 1, play that from the stray field of lens unit 3 blade 22,23 is had an effect to the direction of blocking-up light path.Therefore, if stray field is excessive, the speed of blade 22,23 blocking-up light paths will accelerate, yet its reverse side is opened comparatively difficulty of light path by blade 22,23.

That is, the direction of the stray field that is produced when lens unit 3 is set to can accelerate to make blade 22,23 when closing the action of light path, and the light path of blade 22,23 is opened action and can be become slow on the contrary.In mechanical shutter 2, the speed that light path is opened action is not very important performance, yet, also can't open the phenomenon of light path during the circulation rated current and not wish also to occur.In a word, though the stray field that lens unit 3 is produced can be accelerated the closing velocity of light path, be not that stray field is the bigger the better.

Under the excessive situation of stray field, preferably, stray field is reduced to suitable size by magnetic shield panel 5 is set.Thus, by magnetic shield panel 5, the part stray field that blocking-up is leaked to mechanical shutter 2 from lens unit 3.Therefore, even from lens unit 3 excessive leakage magnetic field is arranged, wherein a part can be blocked by magnetic shield panel 5.That is, magnetic shield panel 5 can reduce stray field.Thereby,, also can open light path by blade 22,23 even excessive leakage magnetic field is arranged.

As mentioned above, the effect that the purpose of magnetic shield panel 5 is to alleviate stray field is set.And, preferably magnetic shield panel 5 is arranged between mechanical shutter 2 and the lens unit 3.Thus, can alleviate the effect of stray field more reliably.

In addition, in the camera model 1 of present embodiment, the leading section of lens 31 (leading section of lens 31 and lens drum 32) is formed with teat 31a, and this teat 31a also will give prominence to than the end face (upper surface of guard shield 35) of lens unit 3.And this teat 31a is outstanding from the end face (upper surface of guard shield 35) of lens unit 3.In other words, the end face of lens unit 3 (upper surface of guard shield 35) is in the position also lower than the teat 31a of lens 31.In addition, the teat 31a of lens 31 is housed in the recess 21 at the back side that is formed at mechanical shutter 2.Therefore, on the end face of lens unit 3 stacked be provided with thickness (apparent thickness) after the mechanical shutter 2, mechanical shutter 2 and lens unit 3 less than before stacked, both thickness sums of mechanical shutter 2 and lens unit 3, its thickness difference is the difference in height between the teat 31a of the end face of lens unit 3 and lens 31.Thereby, even on lens unit 3 stacked mechanical shutter 2, can not cause camera model 1 blocked up yet.

That is, in camera model 1, the part (leading section) of lens 31 and lens drum 32 is given prominence to and is arranged in the recess 21 of mechanical shutter 2 than the upper surface of lens unit 3.According to this structure, can effectively utilize the blind area of mechanical shutter 2, compared to the situation of simple stacked mechanical shutter 2 and lens unit 3, thickness that can attenuate camera model 1.In addition,, therefore, the structure of the drive member of mechanical shutter 2 is set in the prior art in the side of lens unit 3, can realizes the miniaturization of camera model because mechanical shutter 2 and lens unit 3 are stacked settings.

Thereby the camera model 1 with mechanical shutter 2 and lens unit 3 can be realized miniaturization and slimming simultaneously.

Fig. 2 is the state (steady state (SS) of the camera model 1 of expression drive division when lens unit 3 not being driven; Home Position) sectional view.Relative therewith, Fig. 7 represents that drive division drives lens unit 3 and the sectional view of the state of the camera model 1 of lens 31 (lens keep body 33) when moving to the extreme higher position.

In addition, in the camera model 1 of present embodiment, as shown in Figure 7, when lens unit 3 drives lens 31, lens 31 are not in contact with one another in its whole movable range with mechanical shutter 2.

Drive lens 31 by this way, then in the whole movable range of lens 31, lens 31 do not contact mutually with mechanical shutter 2.That is, between lens 31 and mechanical shutter 2, leave the gap all the time.Thus, though in order to adjust focal length under the situation of mobile lens on the optical axis direction 31, lens 31 can not be in contact with one another with mechanical shutter 2 yet.Thereby, can prevent the dislocation (focus adjustment deviation) of lens 31.

And, in the camera model 1 of present embodiment, when lens unit 3 drives lens 31, lens 31 are not in contact with one another in its whole movable range with magnetic shield panel 5.

Drive lens 31 by this way, then in the whole movable range of lens 31, lens 31 do not contact mutually with magnetic shield panel 5.That is, between lens 31 and magnetic shield panel 5, leave the gap all the time.Thus, lens 31 do not contact with magnetic shield panel 5.Thereby, can prevent the dislocation (focus adjustment deviation) of lens 31.

As mentioned above, in the camera model 1 that present embodiment provided, when the direction (the last direction of figure) of elongating focal length drove lens 31, the stopper element of lens unit 3 made lens 31 move in predetermined stroke range.Particularly, in the example of Fig. 7, the locking function of realizing stopper element by the leaf spring 38a that on lens keep body 33, fixed and the mutual butt between the guard shield 35.Under this state, lens 31 are positioned at the extreme higher position.In addition, in this state, guarantee that certain interval is arranged between lens drum 32 and the mechanical shutter 2 (basket 26) and between lens drum 32 and magnetic shield panel 5.That is, prevent the direct impulsive force of between lens drum 32 applies because of parts, conflicting and being produced.If lens drum 32 is subjected to impulsive force, may cause the focal position of lens 31 to change.But in camera model 1, owing to can not be applied in this type of impulsive force, thereby can prevent the variation of focal position.

In addition, in the camera model 1 of present embodiment, magnetic shield panel 5 is formed with opening 5a on light path, and the diameter of this opening 5a is less than the diameter that is formed on the opening 35a on the lens unit 3 and greater than the diameter of the teat 31a of lens 31.In other words, the diameter of opening 5a is identical or roughly the same with the internal diameter of the recess 21 of mechanical shutter 2.

At this, can consider to dispose by the following method magnetic shield panel 5, that is: on image unit 4, be provided with after the lens unit 3, the method for magnetic shield panel 5 is set on lens unit 3; Bonding magnetic shield panel 5 on lens unit 3 or mechanical shutter 2 in advance then, is provided with the method that magnetic shield panel 5 is set in the mechanical shutter 2 on lens unit 3 on lens unit 3.In order to simplify manufacturing process, preferably adopt the aftermentioned method.

Yet being used to keep the lens drum 32 of lens 31 is after bonding base 39 grades, to be embedded into lens again and to keep in the body 33 on image unit 4.As shown in Figure 7, for the diameter of the opening 5a that makes magnetic shield panel 5 less than the diameter that is formed on the opening 35a on the lens unit 3 and greater than the diameter of the teat 31a of lens 31, the bonding magnetic shield panel 5 at the back side of mechanical shutter 2 in advance, afterwards, magnetic shield panel 5 is set when mechanical shutter 2 is set on lens unit 3 on lens unit 3.

As shown in Figure 7, if the diameter of the opening 5a of magnetic shield panel 5 formed less than the diameter of opening 35a lens unit 3 on and greater than the diameter of the teat 31a of lens 31, just can reduce the diameter of the opening 5a of magnetic shield panel 5 thereafter.That is, can increase the area of magnetic shield panel 5.Thereby, can strengthen the Magnetic Shielding Effectiveness of magnetic shield panel 5.In this case, earlier magnetic shield panel 5 is installed, lens drum 32 is installed on lens unit 3 then and is carried out the adjustment of focus, operation such as fixing in mechanical shutter 2 sides, last, get final product at lens unit 3 loam cakes installation tool shutter 2 and magnetic shield panel 5.

In addition, first bonding magnetic shield panel 5 on the end face of lens unit 3 afterwards, is provided with magnetic shield panel 5 at the back side of mechanical shutter 2 when mechanical shutter 2 is set on lens unit 3, can obtain structure shown in Figure 8 like this.Fig. 8 is the sectional view of the camera model of another embodiment of expression the present invention.The opening 5b of the magnetic shield panel 5 among Fig. 8 is greater than the opening 5a of the magnetic shield panel among Fig. 75.That is, the opening 5b of magnetic shield panel 5 is greater than the external diameter (lens keep the internal diameter of body 33) of lens drum 32.Therefore, the diameter of opening 5b is greater than the diameter of opening 5a shown in Figure 7.That is, the area of magnetic shield panel 5 diminishes.Thereby the magnetic shield panel effect of magnetic shield panel 5 shown in Figure 8 is a little less than the magnetic shield panel effect of magnetic shield panel shown in Figure 75.

In structure shown in Figure 7, the back side of magnetic shield panel 5 has the part of exposing from the end face of lens unit 3, with respect to this, and in structure shown in Figure 8, the part that does not almost expose on the magnetic shield panel 5.That is, in structure shown in Figure 8, whole top (surface) and whole following (back side) of magnetic shield panel 5 connect with the back side of mechanical shutter 2 or the end face of lens unit 3.Therefore, in structure shown in Figure 8,, also can form parasitic light because of the reflected light of magnetic shield panel 5 hardly even magnetic shield panel 5 is the parts with metallic luster.

As mentioned above, have under the situation of structure shown in Figure 8, before lens drum 32 is installed to lens unit 3, need at the end face of lens unit 3 magnetic shield panel 5 to be installed earlier.For lens drum 32 can be installed, on magnetic shield panel 5 form opening 5b, and make the diameter of this opening 5b external diameter greater than lens drum 32 thereafter.

In addition, as shown in Figure 7, in the camera model 1 of present embodiment, the both ends of lens unit 3 on optical axis direction are formed with opening (the opening 35a of light incident side, the opening 39a of light exit side).Therefore, Wai Bu foreign matter might invade in the lens unit 3 by the opening 35a of light incident side.And, also there is the situation that produces foreign matter from the inside of lens unit 3.In addition, above-mentioned foreign matter may be discharged to the outside by the opening 39a of light exit side.

Particularly, foreign matter by be formed at opening 35a on the guard shield 35 and invade or, under the situation that foreign matter comes off from lens unit 3 inside, these foreign matters might be fallen on the base 39 by gap between coil 36 and bar 34 or the permanet magnet 37 and the inter-pattern space of leaf spring 38a and 38b etc.If the foreign matter on the arrival base 39 escapes and enter the light path from the opening 39a of light exit side, will form defectives such as spot.

Therefore, lens unit 3 is carried out following foreign matter and prevented measure.That is, prevent measure, on the lens maintenance body 33 of lens unit 3, form projection 33a as foreign matter.Projection 33a is formed on the bottom surface that lens keep body 33, and in the form of a ring.That is, the internal diameter of this projection 33a is greater than the opening 39a of the light exit side that forms on the base 39.And projection 33a is formed on the whole periphery of opening 39a, makes this projection 33a surround opening 39a.Thus, foreign matter will narrow down to the space that opening 39a moves.That is, projection 33a can stop foreign matter to move to opening 39a side from base 39.Thereby, can reduce the possibility that the foreign matter in the lens unit 3 is deviate from from opening 39a significantly.

In addition, when foreign matter was shed to downside from opening 39a, this foreign matter then can be attached on solid-state imager 42 that is positioned at lens unit 3 downsides or the transparent member (cover glass) 44.Accompanying foreign matter will be identified as image and form spot.And projection 33a can reduce the generation of this type of spot significantly.

As mentioned above, in lens unit 3, projection 33a surrounds the opening 39a of light incident side.And this projection 33a of formation can block foreign matter from path that opening 39a deviates from.Thereby, can reduce the possibility that foreign matter is deviate from from opening 39a.

And the lens unit 3 of present embodiment has the structure by electromagnetic force mobile lens 31 (lens keep body 33) on optical axis direction.As mentioned above, what Fig. 2 represented is that drive division drives and the steady state (SS) (Homeposition) of lens 31 (lens keep body 33) when not being moved.Relative therewith, what Fig. 7 represented is that drive division drives and the state of lens 31 (lens keep body 33) when moving to the extreme higher position.We can say that what Fig. 2 represented is the unused state that does not use lens function, and the user mode that has been to use lens function that Fig. 7 represents.

Under steady state (SS) as shown in Figure 2, if electromagnetic force is had an effect, then lens 31 (lens keep body 33) can move on optical axis direction.Thus, as shown in Figure 7, lens keep body 33 will rise to position approaching or contact guard shield 35.In addition, as shown in Figure 2, be under the steady state (SS) at the unused state that does not use lens function, projection 33a contacts with base 39.That is to say, at the non-driving time of drive division, projection 33a and base 39 mutual butts.Thus, under steady state (SS), projection 33a can block the mobile route of foreign matter.Thereby, can reduce the possibility that foreign matter is deviate from from opening 39a reliably.

And when lens unit 3 was in steady state (SS) shown in Figure 2, projection 33a and base 39 connected, and simultaneously, because the elastic reaction of leaf spring 38a, 38b, lens keep body 33 to be subjected to carrying out applied pressure down.That is, leaf spring 38a, 38b keep body 33 to apply the pressure that it is pushed to light exit side to lens.Therefore, butt projection 33a and base 39 reliably.Thus, projection 33a can block the mobile route of foreign matter reliably.Thereby can reduce effectively from the foreign matter of each opening turnover.Can reduce foreign matter more reliably with this deviates from from opening 39a.

In addition, though under state shown in Figure 7, the mobile route when projection 33a does not move the opening 39a of foreign matter on base 39 plays barrier effect (to the covering effect of opening 39a).But in the camera model 1 of reality, the unused time of lens function is longer than service time (for example, the actuation time of focusing automatically) far away.That is to say, be in unused state at most of time lens functions.Therefore, under steady state (SS), the mobile route that makes projection 33a can block foreign matter gets final product at least.Thus, can reduce the possibility that foreign matter is deviate from from opening 39a fully.And, can also prevent that foreign matter from falling solid-state image pickup unit 42 or transparent member (cover glass) 44 sides.

In addition, in camera model 1, be positioned at the top of base 39 and be positioned at permanet magnet 37 and coil 36 under near position be formed with groove 39b, the sticking dedusting agent 40 of coating in the groove 39b.Particularly, in lens unit 3, base 39 keep being formed with groove 39b on the body 33 opposed bottom surfaces with lens.And, on this opposed bottom surface, also be formed with protuberance, and protuberance is provided with leaf spring 38b.Like this, base 39 is formed concaveconvex shape, then the foreign matter mobile route of the opening 39a from base 39 to light exit side can become complicated.Thereby, can prevent reliably that foreign matter from deviating from from the opening 39a of light exit side.

In addition, can on the whole zone around the opening 39a, form groove 39b and protuberance, also can on the subregion, form groove 39b and protuberance.And concaveconvex shape is complicated more, can prevent the phenomenon that foreign matter is deviate from from opening 39a effectively more.

For formation position and the indefinite of groove 39b, but preferred as lens unit 3, with groove 39b be arranged on coil 36, permanet magnet 37 under.That is, preferably, under formed gap on the optical axis direction, form groove 39b between the flange part of lens maintenance body 33 and the permanet magnet 37 and between coil 36 and the permanet magnet 37.Form groove 39b as described above, when foreign matter is fallen on the base 39 by the gap, can immediately foreign matter be captured among the groove 39b.

In addition, preferably, go up the dedusting agent 40 of coating as cohesive material on the surface of base 39 (with the relative face in bottom surface of lens maintenance body 33).More preferably, identical with lens unit 3, coating dedusting agent 40 in groove 39b.Thus, dedusting agent 40 can capture the foreign matter that moves on base 39.Thereby, can prevent reliably that foreign matter from deviating from from the opening 39a of light exit side.In addition, if at groove 39b coating dedusting agent 40, just can be in groove 39b with foreign body retention.That is, can will fall foreign body retention on the base 39 via above-mentioned gap in groove 39b.

That is, in lens unit 3, on the base 39, be positioned at coil 36 and permanet magnet 37 under near part be coated with dedusting agent 40.Therefore, when foreign matter directly fell by the gap between coil 36 and the permanet magnet 37, foreign matter can be fallen on the dedusting agent 40.Thereby dedusting agent 40 can capture foreign matter.

As mentioned above, apply dedusting agent 40, just can capture foreign matter by on the mobile route of foreign matter, being coated with.And in lens unit 3, the coating position of dedusting agent 40 is positioned at before the position that the foreign matter mobile route blocked by projection 33.Therefore, dedusting agent 40 can capture movably most of nowhere foreign matters.

For dedusting agent 40, be not particularly limited, get final product so long as have the material of viscosity.For example, can use the grease or the resin of the semi-solid state of solid (perhaps near).For example, the suitable railway grease that uses.Railway grease is a kind of semi-solid or near the grease of liquid, can be made of the semi-solid state of solid (perhaps near) or the lubricant of paste.Railway grease for example can adopt molybdenum disulfide series lubricant agent, white group lubricant, silicone lubricant, perfluoropolyether (perfluoro polyether) lubricant etc.In addition, can also use with mineral oil as the mineral oils railway grease of principal ingredient, with poly-a-olefin oil as the polyalphaolefin class railway grease of principal ingredient, with silicone oil as the silicone railway grease of principal ingredient, fluorosilicone class railway grease, be perfluoropolyether railway grease of principal ingredient etc. with PFPE.For these railway grease, can use separately or also can use mixing more than 2 kinds.And, also can contain railway grease additive in the railway grease just like lithium paraffin, calcium paraffin, polytetrafluoroethylene (PTFE) etc.

In addition, in lens unit 3, projection 33a is formed on lens and keeps on the body 33.But, also projection can be formed on the base 39.And, irrelevant (haveing nothing to do), the structure of shifting to the foreign matter mobile route of opening 39a capable of blocking of the user mode that also can form a kind of and lens function with the driving condition of drive division.

The camera model 1 of Fig. 1 also can form other following structures.Figure 13 and Figure 14 represent the sectional view of other camera model (variation of camera model 1 shown in Figure 2).

The structure of camera model 1 shown in Figure 2 is: solid-state imager 42 is incorporated on the bottom surface that keeps seat 43 in the formed recess.Therefore, owing to keep the component tolerance of seat 43, also following situation may appear, that is, and and the situation that keeps seat 43 situations about contacting, keeps seat 43 situations about contacting, keeps seat 43 and solid-state imager 42 to contact with wiring substrate 41 boths with wiring substrate 41 with solid-state imager 42.

In camera model 1a shown in Figure 13, keep seat 43 to be designed to the dimensional structure that closely contacts with solid-state imager 42, keep being formed with the gap between seat 43 and the wiring substrate 41.In keeping the gap that forms between seat 43 and the wiring substrate 41, fill bonding agent (not shown).

In camera model 1a, be the focal position that benchmark is set lens 31 with the shooting face (surface) of solid-state imager 42.For example, in camera model 1a, under the bottom surface of the base 39 of lens unit 3 and the state that keeps connecting above the seat 43, on optical axis direction, drive lens 31 (lens drum 32), shooting face with solid-state imager 42 is a benchmark, adjusts the focal length of unlimited far-end.For the adjustment of focal length, for example, adopt the helicitic texture that keeps body 33 to form by lens drum 32 and lens.Particularly, keep body 33 wherein one squarely to become external thread, form internal thread, make it possible to adjust lens drum 32 keeps body 33 with respect to lens height the opposing party at lens drum 32 and lens.In camera model 1a, keep seat 43 and sensitive surface starting point, solid-state imager 42 that becomes focal length to connect.Under the state that this above maintenance seat 43 and bottom (bottom surface of base 39) of lens unit 3 connects, mobile lens 31 on optical axis direction.So, can reduce the height error (focal length error) of lens 31 with respect to the sensitive surface of solid-state imager 42.

As mentioned above, when the height error that makes lens 31 obtains reducing,, can reduce the amount of being screwed into that lens drum 32 keeps body 33 to be screwed into respect to lens based on above-mentioned helicitic texture.Therefore, can reduce the deviation of the amount of being screwed into.Because the deviation that lens keep the stroke amount of body 33 to be based on this amount of being screwed into sets,, can set the stroke amount that lens keep body 33 more so the deviation of the amount of being screwed into is more little lessly.Thus, can reduce lens unit 3 desired thrusts.If can make lens keep the stroke amount of body 33 to be reduced, can reduce to be used to drive lens 31 and the magnetic force that is arranged on the permanet magnet 37 of lens unit 3.Its result can realize the miniaturization of permanet magnet 37 and the number of windings of cutting down coil 36.Therefore, can realize the low power consumption of lens unit 3.And, under the situation that the magnetic force of permanet magnet 37 is reduced, also can suppress the stray field of leaking to mechanical shutter 2.And then, can reduce the influence of stray field to the characteristic of mechanical shutter 2.

On the other hand, camera model 1b shown in Figure 14 is to the example after the further improvement of camera model 1a shown in Figure 13.The maximum difference of camera model 1b and camera model 1a is: the maintenance seat 43 of the base of lens unit 3 and image unit 4 forms as one.That is to say that base 39 double as form single part for keeping seat 43.Therefore, compare to camera model 1a, can cut down the quantity of parts, realize cost degradation.At base 39 with when keeping seat 43 to form as one, compare to when forming respectively independently parts, can reduce to keep seat 43 at thickness deviation on the optical axis direction and base 39 the two cumulative errors of the thickness deviation on optical axis direction.Thus, can improve the degree of accuracy of thickness between top (and lens keep the projection 33a of body 33 to connect face) and following (and the sensitive surface of solid-state imager 42 connect face) of base 39.So, comparing to camera model 1a, camera model 1b can further reduce the height error (focal length error) of lens 31 with respect to the sensitive surface of solid-state imager 42, and then, can make the height and position of lens 31 realize high precision int.In addition, with camera model 1a in the same manner, can realize the miniaturization and the low power consumption of lens unit 3, can also reduce from the influence of the stray field of lens unit 3 characteristic of mechanical shutter 2.

As mentioned above, in camera model of the present invention,, and the part of imaging lens system or lens drum is arranged on structure in the recess of central portion of mechanical shutter, can reduces the thickness of camera model by stacked mechanical shutter and the lens driver of being provided with.In addition, drive at the scioptics drive unit under the situation of imaging lens system,, setting optimum gap between lens drum and the mechanical shutter or between lens barrel and magnetic shield panel for avoiding directly lens drum being applied impulsive force.And, for reducing the stroke amount of lens unit, on solid-state imager, directly be equipped with the maintenance seat that is used to cover solid-state imager.

In addition, the camera model that embodiments of the present invention provided is applicable on the first-class electronic product of photographing of portable phone, digital camera, monitoring camera with camera function.And the camera model that embodiments of the present invention provided has miniaturization, slimming feature, therefore the most suitable installing and using in portable phone.When being installed to portable phone, also magnetic or permanet magnet might be installed in portable phone inside.These magnetics or permanet magnet can produce certain influence to direction, the size of the stray field of lens unit, but on the whole, these stray fields cause harmful effect can for the closing velocity of mechanical shutter, and are preferably set to the size that can carry out breakdown action.

In sum, can do following statement to the present invention.

(1) a kind of camera model, comprise the lens drive division, shutter portion and imaging apparatus, wherein, the said lens drive division is used for driving the inner imaging lens system that keeps by electromagnetic force on optical axis direction, above-mentioned shutter portion controls the light quantity that is incident to above-mentioned imaging lens system by the blade that is used to block or open light path, above-mentioned imaging apparatus will become electric signal by the converting optical signals that above-mentioned imaging lens system received, this camera model is characterised in that: said lens drive division and above-mentioned shutter portion adopt electromagnetic drive mode, and above-mentioned shutter portion adopts with the moving-magnetic type drive form of permanet magnet as movable part; Play the effect of accelerating shutter close speed by the magnetic field that the said lens drive division leaks.

According to above-mentioned technical characterictic,, thereby can prevent the generation of trailing because this camera model has shutter portion (mechanical shutter).And, owing to have a lens drive division, thus can be on optical axis direction the dollying lens to realize the focusing function.

According to above-mentioned technical characterictic, in this camera model of the lens drive division of shutter portion with moving-magnetic type and VCM mode, can suitably set the band magnetic direction of the employed permanet magnet of lens drive division, thereby make the stray field of leaking play the effect of accelerating shutter close speed from the lens drive division.Therefore, the closing velocity as its most important performance concerning shutter portion (blade) can not be adversely affected, and can effectively utilize the stray field of VCM to accelerate the closing velocity of shutter on the contrary, realizes the high performance of shutter portion.

As mentioned above, camera model of the present invention constitutes, and sets the band magnetic direction of the permanet magnet in the lens drive division, makes the leakage field field energy of lens drive division play the effect of the closing velocity of accelerating shutter portion (mechanical shutter).Thus, in the camera model that possesses mechanical shutter and lens drive division, can realize that the stray field of lens drive division can not produce dysgenic effect to the closing motion of shutter.That is,, also can obtain can not produce dysgenic camera model to the closing motion of shutter even be used in combination under the situation of the shutter of moving-magnetic type and VCM.

(2) according to above-mentioned (1) described camera model, it is tool above-mentioned shutter portion and the stacked architectural feature that is arranged on the optical axis direction of said lens drive division also.

According to above-mentioned technical characterictic, by forming with shutter portion and the stacked structure that is arranged on the optical axis direction of lens drive division, near the position drive division (the 2nd drive division) of shutter portion, the direction of the stray field of leaking from the side surface part of lens drive division is almost vertical with optical axis direction.On the other hand, because also almost vertical with optical axis direction from the magnetic direction of the magnetic pole piece of shutter portion, therefore influence each other is bigger.So, by will being made as the direction of the closing motion that can accelerate blade, thereby can improve the effect of quickening closing velocity from the direction of the stray field of lens drive division.

(3) according to above-mentioned (2) described camera model, it also has the architectural feature that is provided with magnetic shield panel between said lens drive division and above-mentioned shutter portion.

According to above-mentioned camera model, when being set to the direction that can accelerate the blade closing motion from the direction of the stray field of lens drive division, it is slow that the breakdown action of shutter will become.Though the speed of breakdown action is not to be important performance, the phenomenon that still can't open when flowing through rated current does not wish to take place.

According to above-mentioned technical characterictic, by magnetic shield panel is set, can reduce the stray field that enters shutter portion of leaking from the lens drive division, therefore, can prevent that the phenomenon that causes shutter not opened owing to stray field is excessive from taking place.

(4) a kind of electronic equipment is characterized in that possessing according to the described camera model in above-mentioned (1)～(3).

Because the described camera model in above-mentioned (1)～(3) has miniaturization, slimming feature, therefore, the most suitable being used on the electronic equipment such as portable phone.

In sum, camera model of the present invention has adopted shutter portion with moving-magnetic type drive member and has been the lens driver of drive source with the electromagnetic force, and, setting is used to drive the magnetic field of imaging lens system, make that the effect of blade to the direction action of blocking-up light path that make played in the magnetic field of above-mentioned leakage when the stray field of leaking from the lens drive division affacts on the drive member of shutter portion.Thus, be the lens drive division and the shutter portion of drive source even be provided with in the camera model with the electromagnetic force, also can effectively prevent the generation of conditions of streaking.

In camera model of the present invention, preferably, the stacked setting on optical axis direction of said lens drive division and shutter portion.

According to this technical characterictic, the stacked setting on optical axis direction of lens drive division and shutter portion.That is, lens drive division and shutter portion that the position is set is close mutually.Therefore, the stray field of leaking from the lens drive division affacts in the shutter portion easily.Thereby, can prevent the generation of conditions of streaking more reliably.

In addition, so-called " the stacked setting on optical axis direction of lens drive division and shutter portion " do not limit to the state that expression be arranged in parallel with respect to optical axis, can represent the state that is obliquely installed a little with respect to optical axis yet, that is, get final product with respect to the setting of optical axis almost parallel ground.

In camera model of the present invention, preferably, be provided with magnetic shield panel between said lens drive division and the shutter portion, this magnetic shield panel is used to block the part magnetic field of leaking to above-mentioned shutter portion from the said lens drive division.

As mentioned above, the effect of stray field helps to accelerate the responsiveness of blade blocking-up light path.Yet,,, open the light path comparison difficulty that but becomes by blade though can accelerate the speed of blade blocking-up light path if stray field is excessive.

So, can block the part stray field that leaks into shutter portion from the lens drive division by magnetic shield panel according to above-mentioned feature of the present invention.Therefore, even have excessive magnetic field to leak from the lens drive division, a part of stray field of its leakage can be blocked by magnetic shield panel.That is to say that magnetic shield panel can reduce stray field.Thereby,, also can open light path by blade even there is excessive magnetic field to leak.

In addition, so-called " blocking-up leaks into the part stray field of shutter portion from the lens drive division ", the stray field that its expression is leaked from the lens drive division is when the direction of blocking-up light path is had an effect, blocks a part of stray field and makes the degree that can open light path that reaches.

In camera model provided by the invention, preferably, the leading section of imaging lens system is formed with from the outstanding teat of lens drive division end face, and shutter portion is arranged on the end face of lens drive division, and the back side of above-mentioned shutter portion is formed with teat with imaging lens system and is housed in wherein recess.

According to this technical characterictic, shutter portion is arranged on the end face of lens drive division.Therefore, even be provided with the width that shutter portion also can not strengthen the lens drive division.Thereby the setting of shutter portion can not cause the maximization of camera model.

And imaging lens system has teat, and the leading section of imaging lens system is outstanding from the end face of lens drive division.In other words, the end face of lens drive division is on the position of the teat that is lower than imaging lens system.And the teat of imaging lens system is housed on the shutter portion back side in the formed recess.Thus, on the end face of lens drive division stacked be provided with thickness (apparent thickness) after the shutter portion, shutter portion and lens drive division less than before stacked, shutter portion and lens drive division thickness sum separately, the thickness difference of its stacked front and back is the difference in height between the teat of the end face of lens drive division and imaging lens system.Thereby, even on the lens drive division the stacked shutter portion that is provided with, can not cause camera model blocked up yet.

Thus, can realize having the miniaturization and the slimming of the camera model of mechanical shutter and lens drive division simultaneously.

In camera model of the present invention, preferably, when the lens drive division drives imaging lens system in the whole movable range of imaging lens system, imaging lens system is not contacted mutually with shutter portion.

According to this technical characterictic, in the whole movable range of imaging lens system, imaging lens system does not contact mutually with shutter portion.That is, be formed with certain interval all the time between imaging lens system and the shutter portion.Therefore imaging lens system can not touch shutter portion.Can prevent the dislocation (focus adjustment deviation) of imaging lens system like this.

In camera model of the present invention, preferably, when the lens drive division drives imaging lens system in the whole movable range of imaging lens system, imaging lens system is not contacted mutually with magnetic shield panel.

According to this technical characterictic, in the whole movable range of imaging lens system, imaging lens system does not contact mutually with magnetic shield panel.That is, be formed with certain interval between imaging lens system and the magnetic shield panel all the time.Therefore imaging lens system can not touch magnetic shield panel.Can prevent the dislocation (focus adjustment deviation) of imaging lens system like this.

In camera model of the present invention, preferably, magnetic shield panel is formed with opening on light path, the opening diameter of magnetic shield panel (internal diameter) is less than being formed on the diameter (internal diameter) that being used on the lens drive division keeps the opening of imaging lens system, and greater than the diameter (external diameter) of the teat of imaging lens system.

According to this technical characterictic, the opening diameter of magnetic shield panel is less than being formed on the diameter that being used on the lens drive division keeps the opening of imaging lens system, and greater than the diameter of the teat of imaging lens system.The area of magnetic shield panel can be strengthened like this, thereby the Magnetic Shielding Effectiveness of magnetic shield panel can be strengthened.

In camera model of the present invention, preferably, has the seat of maintenance, this keeps seat to cover above-mentioned imaging apparatus, and avoid the light accepting part of above-mentioned imaging apparatus, the sensitive surface of above-mentioned maintenance seat and above-mentioned imaging apparatus connects, and under the state that the said lens drive division connects with the bottom of said lens drive division on make above-mentioned maintenance seat, drives above-mentioned imaging lens system on optical axis direction.

According to this technical characterictic, keep seat to connect with the sensitive surface starting point that becomes focal length, solid-state imager.And, under the state that on make above-mentioned maintenance seat, connects, on optical axis direction, drive above-mentioned imaging lens system with the bottom of said lens drive division.So, can reduce the height error (focal length error) of imaging lens system with respect to the sensitive surface of imaging apparatus.

In camera model of the present invention, preferably, the said lens drive division has base, and this base constitutes the bottom of said lens drive division, and above-mentioned maintenance seat and above-mentioned base form as one.

According to this technical characterictic, keep the seat and the sensitive surface of imaging apparatus to connect, base constitutes the bottom of said lens drive division, and this maintenance seat forms as one with this base.That is to say that the base double as of said lens drive division is above-mentioned maintenance seat.Therefore, can be formed for constituting the above-mentioned base and the maintenance seat of single part simultaneously.So, can reduce above-mentioned maintenance seat at thickness deviation on the optical axis direction and above-mentioned base the two cumulative errors of the thickness deviation on optical axis direction.And then, can further reduce the height error (focal length error) of imaging lens system with respect to the sensitive surface of imaging apparatus.

In addition, in order to solve above-mentioned problem, the present invention also provides a kind of electronic equipment, it is characterized in that possessing any one above-mentioned camera model.Therefore, this electronic equipment is under the situation of mechanical shutter of the lens drive division of drive source and moving-magnetic type possessing with the electromagnetic force, also can effectively prevent the generation of conditions of streaking.

The present invention is particularly useful for being installed on the camera model in the portable terminals such as communication facilities, in the camera model of the lens driver of mechanical shutter that possesses moving-magnetic type and VCM mode, can take to prevent the effective measures of trailing.

The present invention is not limited to the respective embodiments described above, can carry out various changes in the scope shown in its technical scheme, also belongs to technical scope of the present invention by the different embodiment that technological means obtained that embodiment disclosed of suitable combination.

More than, the present invention is had been described in detail, above-mentioned embodiment or embodiment only are the examples that discloses technology contents of the present invention, the present invention is not limited to above-mentioned concrete example, should not carry out the explanation of narrow sense, can in the scope of spirit of the present invention and its technical scheme, carry out various changes and implement the present invention.

Claims (16)

1. camera model, comprise lens drive division, shutter portion and imaging apparatus, wherein, the said lens drive division is used for driving the inner imaging lens system that keeps by electromagnetic force on optical axis direction, above-mentioned shutter portion controls the light quantity that is incident to above-mentioned imaging lens system by blocking-up or the blade of opening light path, above-mentioned imaging apparatus will become electric signal by the converting optical signals that above-mentioned imaging lens system received, and this camera model is characterised in that:

Above-mentioned shutter portion has the drive member of moving-magnetic type, and the drive member of this moving-magnetic type is by driving above-mentioned blade with the power-actuated permanet magnet of electromagnetism;

Setting is used to drive the magnetic field of above-mentioned imaging lens system, make that at the action of a magnetic field that leaks by the said lens drive division effect that above-mentioned blade is moved to the direction of blocking light path is played in the magnetic field of above-mentioned leakage under the situation of the drive member of above-mentioned shutter portion.

2. camera model as claimed in claim 1 is characterized in that:

The stacked setting on optical axis direction of said lens drive division and above-mentioned shutter portion.

3. camera model as claimed in claim 1 is characterized in that:

Be provided with magnetic shield panel between said lens drive division and the above-mentioned shutter portion, this magnetic shield panel is used to block the part magnetic field of leaking to above-mentioned shutter portion from the said lens drive division.

4. camera model as claimed in claim 1 is characterized in that:

The leading section of above-mentioned imaging lens system is formed with from the outstanding teat of said lens drive division end face,

Above-mentioned shutter portion is arranged on the end face of said lens drive division,

The back side of above-mentioned shutter portion is formed with teat with above-mentioned imaging lens system and is housed in wherein recess.

5. camera model as claimed in claim 1 is characterized in that:

In the whole movable range of above-mentioned imaging lens system, the said lens drive division drives above-mentioned imaging lens system, makes above-mentioned imaging lens system not contact mutually with above-mentioned shutter portion.

6. camera model as claimed in claim 3 is characterized in that:

In the whole movable range of above-mentioned imaging lens system, the said lens drive division drives above-mentioned imaging lens system, makes above-mentioned imaging lens system not contact mutually with above-mentioned magnetic shield panel.

7. camera model as claimed in claim 3 is characterized in that:

The leading section of above-mentioned imaging lens system is formed with from the outstanding teat of said lens drive division end face,

Above-mentioned magnetic shield panel is formed with opening on light path,

The opening internal diameter of above-mentioned magnetic shield panel is less than the internal diameter that is formed on the opening said lens drive division, that be used to keep above-mentioned imaging lens system, and greater than the external diameter of the teat of above-mentioned imaging lens system.

8. camera model as claimed in claim 3 is characterized in that:

Above-mentioned magnetic shield panel is arranged on the whole back side of above-mentioned shutter portion.

9. camera model as claimed in claim 1 is characterized in that:

The said lens drive division comprises that lens keep body and base, and these lens keep body to be used to keep above-mentioned imaging lens system, and this base is arranged on the bottom of said lens drive division,

Above-mentioned base is formed with the opening that is used to guarantee light path,

Keep the bottom surface of body to be formed with projection in said lens, this projection is surrounded the whole periphery of formed above-mentioned opening on the above-mentioned base.

10. camera model as claimed in claim 9 is characterized in that:

The relative face in bottom surface with said lens maintenance body of above-mentioned base forms concaveconvex shape.

11. camera model as claimed in claim 10 is characterized in that:

In keeping on the relative face in the bottom surface of body of above-mentioned base, be formed with groove near under the above-mentioned permanet magnet with said lens.

12. camera model as claimed in claim 9 is characterized in that:

On the relative face in the bottom surface with said lens maintenance body of above-mentioned base, be coated with cohesive material.

13. camera model as claimed in claim 2 is characterized in that:

Above-mentioned permanet magnet has magnetic on the direction perpendicular to optical axis.

14. camera model as claimed in claim 1 is characterized in that:

Have the seat of maintenance, this keeps seat to cover above-mentioned imaging apparatus, and avoids the light accepting part of above-mentioned imaging apparatus,

The sensitive surface of above-mentioned maintenance seat and above-mentioned imaging apparatus connects,

Under the state that the said lens drive division connects with the bottom of said lens drive division, on optical axis direction, drive above-mentioned imaging lens system on make above-mentioned maintenance seat.

15. camera model as claimed in claim 14 is characterized in that:

The said lens drive division has base, and this base constitutes the bottom of said lens drive division,

Above-mentioned maintenance seat and above-mentioned base form as one.

16. the electronic equipment with camera model is characterized in that:

Above-mentioned camera model comprises lens drive division, shutter portion and imaging apparatus, the said lens drive division is used for driving the inner imaging lens system that keeps by electromagnetic force on optical axis direction, above-mentioned shutter portion controls the light quantity that is incident to above-mentioned imaging lens system by the blade that is used to block or open light path, above-mentioned imaging apparatus will become electric signal by the converting optical signals that above-mentioned imaging lens system received, wherein

Above-mentioned shutter portion has the drive member of moving-magnetic type, and the drive member of this moving-magnetic type is by driving above-mentioned blade with the power-actuated permanet magnet of electromagnetism;

Setting is used to drive the magnetic field of above-mentioned imaging lens system, make that at the action of a magnetic field that leaks by the said lens drive division effect that above-mentioned blade is moved to the direction of blocking light path is played in the magnetic field of above-mentioned leakage under the situation of the drive member of above-mentioned shutter portion.

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