CN100501479C

CN100501479C - lens module

Info

Publication number: CN100501479C
Application number: CNB2006100332233A
Authority: CN
Inventors: 蔡明江
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2006-01-21
Filing date: 2006-01-21
Publication date: 2009-06-17
Anticipated expiration: 2026-01-21
Also published as: CN101004470A

Abstract

A lens module includes a lens barrel, a lens and a sleeve; wherein the lens barrel includes an adjustment magnet; the lens is installed inside the lens barrel; the sleeve includes a positioning magnet group, and the positioning magnet group includes a first positioning magnet A magnet and a second positioning magnet; the lens barrel is installed inside the sleeve, the lens module has a first focus position and a second focus position, and the first focus position and the second focus position are respectively controlled by the The first positioning magnet and the second positioning magnet attract the lens barrel to keep the balance of the lens barrel in the axial direction; The second positioning magnet and the first positioning magnet interact with the adjusting magnet to maintain the balance of the lens barrel in the radial direction.

Description

Camera lens module

[technical field]

The present invention relates to a kind of camera lens module, the particularly a kind of camera lens module that can in focus process, reduce friction.

[background technology]

Be provided with Focusing mechanism more in the camera lens modules, reach the needs of image at a distance more nearby to satisfy respectively to take.General Focusing mechanism all utilizes each the component locations conversion of mechanical driving device controls lens module to focus.Yet, when adopting mechanical driving device to focus, cause the intensity of Focusing mechanism and degree of regulation to be affected because of frequent friction between each drive disk assembly easily, shorten the serviceable life of camera lens module, and influenced shooting quality.

[summary of the invention]

In view of this, being necessary to provide a kind of can reduce friction in focus process, the camera lens module that increases the service life.

A kind of camera lens module comprises a lens barrel, an eyeglass and a sleeve; Wherein lens barrel further comprises a regulating magnet; Eyeglass is installed in lens barrel inside; Sleeve further comprises a location group of magnets, and this phase magnet group comprises one first phase magnet and one second phase magnet; Described lens barrel is installed in this sleeve inner, this camera lens module has one first focusing position and one second focusing position, attracts lens barrel to keep lens barrel balance in the axial direction by this first phase magnet and second phase magnet respectively at this first focusing position and second focusing position; Described phase magnet group and described regulating magnet interact, and are interacted with regulating magnet and maintenance lens barrel balance diametrically by this second phase magnet and first phase magnet respectively at this first focusing position and second focusing position.

Compared with prior art, described camera lens module can be in contact with one another with sleeve in reducing the lens barrel outside to a great extent in focus process, rub thereby reduce between lens barrel and the sleeve, prolonged the serviceable life of camera lens module, and need not add the complicated mechanical gearing, simple in structure, with low cost.

[description of drawings]

Fig. 1 is that the preferred embodiment of camera lens module of the present invention is used for the synoptic diagram than wide-long shot.

Fig. 2 is used for the synoptic diagram that closer distance is taken for the preferred embodiment of camera lens module of the present invention.

[embodiment]

See also Fig. 1, the preferred embodiment of camera lens module of the present invention comprises a lens barrel 1, an eyeglass 2 and a sleeve 3.Wherein eyeglass 2 is installed in lens barrel 1 inside, and lens barrel 1 is installed in sleeve 3 inside.One image sensing module 4 is installed in sleeve 3 one ends, is used to receive the optical image signal from eyeglass 2.

This lens barrel 1 is a hollow circular cylinder, it comprises an external cylindrical surface 101, an inner cylinder face 102, a shooting end 11 and one sense terminals 12, wherein this shooting end 11 and sense terminals 12 are located at the relative two ends of lens barrel 1 respectively, and this shooting end 11 offers one and takes opening 111, and sense terminals 12 offers a sensing opening 121.Lens barrel 1 also comprises a preceding stop section 13, stop section 14, a back, a regulating magnet 15, one first keeper 16 and one second keeper 17.Wherein preceding stop section 13 is an annulus, and it is set in contiguous end 11 places of taking on the external cylindrical surface 101; Back stop section 14 is an annulus, and it is set in contiguous sense terminals 12 places on the external cylindrical surface 101.Regulating magnet 15 ringwise, it is set on the external cylindrical surface 101 contiguous sense terminals 12 places regularly, and in preceding stop section 13 with afterwards between the stop section 14.The south magnetic pole of this regulating magnet 15 is arranged at and holds 11 places near taking, and the north magnetic pole of this regulating magnet 15 is arranged near sense terminals 12 places.First keeper 16 adopts the ferrimagnet manufacturing ringwise, and its external diameter is slightly less than the external diameter of preceding stop section 13, and this first keeper 16 is installed in 13 edges, preceding stop section; Second keeper 17 adopts the ferrimagnet manufacturing also ringwise, and its external diameter is slightly less than the external diameter of stop section 14, back, is installed in 14 edges, stop section, back.

Eyeglass 2 is a circular eyeglass, and its exterior contour matches with the inner cylinder face 102 of lens barrel 1, and eyeglass 2 is installed on lens barrel 1 inside.Be appreciated that the eyeglass 2 that is installed in lens barrel 1 inside in the preferred embodiment of the present invention can be a plurality of.

Sleeve 3 is a hollow circular cylinder, and the inside of its hollow forms the inside surface 301 of a cylindrical so.This sleeve 3 comprises end 31 and one potted ends 32 of coming in and going out, this discrepancys hold 31 and potted ends 32 be located at the relative two ends of sleeve 3 respectively; The end 31 of wherein coming in and going out offers one and regulates opening 311, and this width of regulating opening 311 is greater than the diameter of the external cylindrical surface 101 of lens barrel 1 and the external diameter of regulating magnet 15, and less than the external diameter of preceding stop section 13.This sleeve 3 also comprises a location group of magnets 33 and an a positioning block 34, wherein phase magnet group 33 comprises one first phase magnet 331, one second phase magnet 332, one first magnetic conductive part 333 and one second magnetic conductive part 334, wherein first phase magnet 331 and second phase magnet 332 are annular, this first phase magnet 331 is installed on contiguous end 31 places of coming in and going out on the inside surface 301, this second phase magnet 332 is installed on contiguous potted ends 32 places on the inside surface 301, and the internal diameter of this first phase magnet 331 and second phase magnet 332 is all greater than the diameter of the external cylindrical surface 101 of lens barrel 1, also all greater than the external diameter of stop section 14, back.The north magnetic pole of first phase magnet 331 and second phase magnet 332 all is arranged near potted ends 32 places, and south magnetic pole all is arranged near end 31 places of coming in and going out.First magnetic conductive part 333 and second magnetic conductive part 334 and all adopt the ferrimagnet manufacturing all ringwise.Locating piece 34 a annular lug for convexing to form on the inside surface 301, it is located between first phase magnet 33 and second phase magnet 34, and the internal diameter of this locating piece 34 is greater than the diameter of the external cylindrical surface 101 of lens barrel 1, and less than the external diameter of stop section 14, back.First magnetic conductive part 333 is installed in end 31 inside of coming in and going out, and these first magnetic conductive part, 333 1 ends contact with first phase magnet 331, and the other end exposes outside the lens barrel 1.Second magnetic conductive part 334 is installed in locating piece 34 inside, and the Outboard Sections of these second magnetic conductive part, 334 1 end faces contacts with second phase magnet 332, and the inside part of this end face then exposes near the edge of potted ends 32 from locating piece 34.

Image sensing module 4 comprises a substrate 41 and an image sensing unit 42.Substrate 41 is made by materials such as plastics, glass fibre, reinforced plastics or potteries.Image sensing unit 42 is fixed in the surface of substrate 41, in order to being the electron image signal with the optical image conversion of signals.

When the preferred embodiment of camera lens module of the present invention is assembled, lens barrel 1 is installed in the sleeve 3, then preceding stop section 13 and stop section 14, back are put external cylindrical surface 101 and fixed from the shooting end 11 of lens barrel 1 and sense terminals 12 respectively, and the preceding stop section 13 that makes lens barrel 1 is positioned at outside the discrepancy end 31 of sleeve 3, come in and go out end 31 and locating piece 34 between preceding stop section 13 and stop section 14, back, and lens barrel 1 can move back and forth in sleeve 3 like this; And preceding stop section 13 cooperates with adjusting opening 311, can limit lens barrel 1 moving to potted ends 32; Back stop section 14 cooperates with locating piece 34, can limit lens barrel 1 moving to the end 31 of coming in and going out.When lens barrel 1 to potted ends 32 move by preceding stop section 13 blocks the time, first keeper 16 can contact with first magnetic conductive part 333 and be attracted by first magnetic conductive part 333 by first phase magnet 331, it is fixing with respect to sleeve 3 that lens barrel 1 is axially gone up in it; When lens barrel 1 to the end 31 of coming in and going out mobile during by stop section, back 14 blocks, second keeper 17 can contact with second magnetic conductive part 334 and be attracted by second magnetic conductive part 334 by second phase magnet 332, it is fixing with respect to sleeve 3 that lens barrel 1 is axially gone up in it.Substrate 41 with image sensing module 4 is fixed on the potted ends 32 of sleeve 3 at last, with the sensing opening 121 of image sensing unit 42 over against lens barrel 1, can will be the electron image signal from the optical image conversion of signals of eyeglass 2.

See also Fig. 2, when the preferred embodiment of camera lens module of the present invention is used to take longer-distance scene, earlier with lens barrel 1 to the potted ends 32 of sleeve 3 be pressed into preceding stop section 13 by block in regulating outside the opening 311, this moment eyeglass 2 with the image sensing unit close together, be in one first focusing position, be fit to take longer-distance scene.This moment, regulating magnet 15 was positioned within second phase magnet 332, and the north magnetic pole position of the position of the north magnetic pole of regulating magnet 15 and second phase magnet 332 is approaching, and the south magnetic pole position of the position of the south magnetic pole of regulating magnet 15 and second phase magnet 332 is approaching; If lens barrel 1 will cause regulating magnet 15 more approaching with second phase magnet 332 on the offset direction in its directly upwards occurrence positions skew, the magnetic repulsion on the offset direction is increased; 332 of the regulating magnet 15 on opposite with this offset direction on the other hand direction and second phase magnets mutually away from, magnetic repulsion on this direction is reduced, therefore will to drive lens barrel 1 mobile on this direction opposite with the offset direction for regulating magnet 15 suffered magnetic repulsions, make lens barrel 1 come back to the middle position of inside surface 301, the lens barrel 1 footpath suffered magnetic repulsion complete equipilibrium of all directions upwards herein, lens barrel 1 will reach steady state (SS) in the central authorities of sleeve 3 inside; Because the effect of magnetic repulsion, the external cylindrical surface 101 of lens barrel 1 can not be in contact with one another with the inside surface 301 of sleeve 3.By above method, can prevent that lens barrel 1 from skew directly upwards occurring in it, avoid the external cylindrical surface 101 of lens barrel 1 in the focus process to be in contact with one another simultaneously and rub with sleeve 3.When lens barrel 1 moving to potted ends 32 by preceding stop section 13 blocks, be that lens barrel 1 is when being in first focusing position, first keeper 16 contacts with first magnetic conductive part 333, the magnetic force of first phase magnet 331 has attracted first keeper 16 by first magnetic conductive part 333, prevent that lens barrel 1 from moving in the axial direction, thereby guarantee that lens barrel 1 is positioned at the position that is suitable for taking.

When the preferred embodiment of camera lens module of the present invention is used to take the scene of closer distance, piece 34 blocks are positioned lens barrel 1 stop section 14 after the discrepancy end 31 of sleeve 3 is drawn out to earlier, this moment, eyeglass 2 was far away with the image sensing unit distance, be in one second focusing position, be fit to take the scene of closer distance.This moment, first phase magnet 331 was placed in outside the regulating magnet 15, and similarly, under the effect of magnetic repulsion, lens barrel 1 will reach steady state (SS) in sleeve 3 central interior, prevented that lens barrel 1 from directly upwards occurring being offset and rubbing with sleeve 3 in it; Second keeper 17 then contacts with second magnetic conductive part 334, and the magnetic force of second phase magnet 332 has attracted second keeper 17 by second magnetic conductive part 334, prevents that lens barrel 1 from moving in the axial direction, guarantees that lens barrel 1 is positioned at second focusing position that is suitable for taking.

Be appreciated that, the magnetic pole setting of regulating magnet 15, first phase magnet 331 and second phase magnet 332 in the preferred embodiment of camera lens module of the present invention can change simultaneously, as long as it is all identical that three's magnetic pole is provided with direction, can guarantee that lens barrel 1 relies on electromagnetic repulsion force to keep balance in the middle position of sleeve 3 inside, and avoid the external cylindrical surface 101 of lens barrel 1 to be in contact with one another and rub with sleeve 3.

Claims

1. A lens module, which includes a lens barrel and a lens, wherein the lens is installed inside the lens barrel, characterized in that: the lens barrel includes an adjustment magnet; the lens module further includes a sleeve, and the sleeve includes A positioning magnet group, the positioning magnet group includes a first positioning magnet and a second positioning magnet; the lens barrel is installed inside the sleeve, the lens module has a first focus position and a second focus position, in the The first focus position and the second focus position are respectively attracted by the first positioning magnet and the second positioning magnet to keep the balance of the lens barrel in the axial direction; the positioning magnet group interacts with the adjustment magnet, and at the first focus position and the second focus position are respectively interacted by the second positioning magnet, the first positioning magnet and the adjusting magnet to keep the balance of the lens barrel in the radial direction.

2. The lens module according to claim 1, wherein the lens barrel is a hollow cylinder, which includes an outer cylindrical surface, an inner cylindrical surface, a shooting end and a sensing end, wherein the shooting end The sensing ends are respectively arranged at opposite ends of the lens barrel, and the photographing end is provided with a photographing opening, and the sensing end is provided with a sensing opening.

3. The lens module according to claim 2, wherein the lens barrel further comprises a front stopper and a rear stopper, wherein the front stopper is a ring, which is sleeved on the The outer cylindrical surface is adjacent to the shooting end; the rear stopper is a ring, which is sheathed on the outer cylindrical surface adjacent to the sensing end.

4. The lens module according to claim 3, wherein the lens barrel further comprises a first positioning member and a second positioning member, wherein the adjusting magnet is ring-shaped and fixedly sleeved on the outer cylinder The surface is adjacent to the sensing end, and is located between the front stopper and the rear stopper; both the first positioning part and the second positioning part are ring-shaped and are made of ferromagnetic materials; the first The positioning piece is installed on the edge of the front stopper, and the second positioning piece is installed on the edge of the rear stopper.

5 . The lens module according to claim 2 , wherein the lens is a circular lens whose outer contour fits with the inner cylindrical surface of the lens barrel to fix the lens inside the lens barrel. 5 .

6. The lens module according to claim 4, wherein the sleeve is a hollow cylinder, which includes an inner surface, an access end and a packaging end, wherein the inner surface is the hollow interior of the sleeve Formed cylindrical surface, the inlet and outlet ends and packaging ends are respectively arranged at the opposite ends of the sleeve; the inlet and outlet ends are provided with an adjustment opening, the width of the adjustment opening is greater than the diameter of the outer cylindrical surface of the lens barrel and the adjustment The outer diameter of the magnet is smaller than the outer diameter of the front stop.

7. The lens module according to claim 6, characterized in that: the first positioning magnet and the second positioning magnet are ring-shaped, and the first positioning magnet is fixedly installed on the inner surface adjacent to the inlet and outlet, The second positioning magnet is fixedly installed on the inner surface adjacent to the package end; the inner diameters of the first positioning magnet and the second positioning magnet are larger than the diameter of the outer cylindrical surface of the lens barrel, and are larger than the backstop The outer diameter of the stop portion; the magnetic poles of the adjusting magnet, the first positioning magnet and the second positioning magnet are arranged in the same direction.

8. The lens module according to claim 7, wherein the sleeve further comprises a positioning block, the positioning block is an annular protrusion formed by protruding from the inner surface, and it is arranged on the first Between a positioning magnet and the second positioning magnet; the inner diameter of the positioning block is larger than the diameter of the outer cylindrical surface of the lens barrel, but smaller than the outer diameter of the rear stopper.

9. The lens module according to claim 8, wherein the lens barrel is installed on the sleeve, and the front stopper is located outside the access end, and the access end and the positioning A block is located between the front stop and said rear stop.

10. The lens module according to claim 9, wherein the positioning magnet group further comprises a first magnetically permeable part and a second magnetically permeable part, and the first magnetically permeable part and a second magnetically permeable part both They are ring-shaped and made of ferromagnetic materials; wherein the first magnetic-conducting member can be installed in the sleeve in contact with the first positioning member, and at the same time be in contact with the first positioning magnet; The second magnetic guide part can be installed in the sleeve in contact with the second positioning part, and at the same time be in contact with the second positioning magnet.