CN1847969B

CN1847969B - Two-sectional focuser

Info

Publication number: CN1847969B
Application number: CN200510034252A
Authority: CN
Inventors: 江宗韦
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: 2005-04-15
Filing date: 2005-04-15
Publication date: 2010-05-26
Anticipated expiration: 2025-04-15
Also published as: CN1847969A

Abstract

The two-sectional focuser includes one lens, one outer sleeve, one pressing plate, one pedestal and one waterproof ring. The lens is sleeved and fixed inside the outer sleeve, the pedestal has one holding space for holding the outer sleeve, the waterproof ring is sleeved in the lower end of the outer sleeve, the pedestal has step formed in the bottom for the wedge block in the pedestal to fit, thepressing plate fixed on the pedestal presses the outer sleeve to the pedestal while making the outer sleeve rotatable relatively to the pedestal. The two-sectional focuser has simple structure, convenient assembling, disassembling and use, and waterproofing function.

Description

The two-part focusing mechanism

[technical field]

The invention relates to a kind of two-part focusing mechanism, particularly about the two-part focusing mechanism of a kind of portable electron device with digital camera.

[background technology]

General portable electron device (as mobile phone, PDA etc.) mostly for focusing kind of design thereby can't realize zoom function, and need change focal length in order to photograph farther object with the optical module of digital camera, thereby the position of needs adjustment camera lens.

A kind of existing camera autofocus mechanism, as announce in No. the 02234511.6th, the Chinese patent on March 5th, 2003, this Focusing mechanism is established an inductive coil in the accommodation chamber upper end of photosensory assembly package, in the upper end of photosensory assembly in conjunction with a magnet assembly, its lower end is in conjunction with an elastic parts, and the other end of this elastic parts is combined in the bottom of accommodation chamber.When camera was focused automatically, microprocessor was controlled suitable electric current by inductive coil, produced the magnetic force that repels each other with magnet assembly and promoted photosensory assembly and move, and the size by Control current is with the amount of movement of sense of control optical assembly, the action of focusing automatically.Finish defocused, stop coil electricity, promptly do not have the effect of magnetic force, photosensory assembly returns to initial position under the effect of elastic parts.

Though the camera of prior art can be realized focus function, yet this mechanism need offer the accommodation space of inductive coil, magnet assembly and elastic parts, has increased the volume of whole camera lens module, and makes this camera autofocus mechanism complex structure, dismounting inconvenience; In addition, when inductive coil outage, the magnetic force of its generation disappears and then when making the elastic parts elongation, elastic parts needs the double vibrations certain hour could stablize, and promptly camera need wait for that the certain reaction time just can take pictures, and causes the camera use inconvenient.In addition, above-mentioned existing autofocus mechanism does not have waterproof construction, easily infiltrates steam and influences image quality.

[summary of the invention]

In view of above content, be necessary to provide a kind of simple in structure, dismounting and easy to use and have a two-part focusing mechanism of water-proof function.

A kind of two-part focusing mechanism, comprise a camera lens, one outer sleeve, one pressing plate, one base and a water proof ring, lens jacket is located in the outer sleeve, camera lens and outer sleeve relative fixed, described base has a matrix, vertically extend a plurality of extensions on this matrix and form an accommodation space, outer sleeve is contained in the accommodation space of base, water proof ring is placed in the outer sleeve lower end, described outer sleeve bottom is formed with step, base is provided with the voussoir that matches with described outer sleeve step, this pressing plate has the one side that is depressed in pressing plate and the projection that protrudes in its another side, affixed and the described projection of this pressing plate and described extension flexibly compresses outer sleeve, and outer sleeve can rotate with respect to base.

Compare prior art, described two-part focusing mechanism makes it drive lens barrel by the rotary sleeve tube to rise or descend a fixed range so that produce range difference between lens barrel and the image sensor, thereby realizes the two-part focus function of camera.In addition, each modular construction is simple, and machine-shaping is easy; During assembling, only need outer sleeve is positioned in the accommodation space of base, pressing plate is placed on base and the outer sleeve then, the screw of screwing on, can finish assembling, and structure is firm, if need dismounting, then unclamp screw and get final product, need not be by any instrument, so this two-part focusing mechanism easy accessibility; During focusing, can take after shifting pushing block onto position, need not the reaction time, make easy to use.In addition, be arranged with water proof ring, can prevent that steam is by infiltrating between outer sleeve and the seat in the outer sleeve lower end.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of two-part focusing mechanism of the present invention preferred embodiment;

Fig. 2 is the stereographic map of the outer sleeve of two-part focusing mechanism of the present invention preferred embodiment;

Fig. 3 is the three-dimensional wiring layout of two-part focusing mechanism of the present invention preferred embodiment.

[embodiment]

See also Fig. 1 and Fig. 2, this two-part focusing mechanism is applicable to portable electron devices such as digital camera and mobile phone, and it comprises a camera lens 10, a pressing plate 20, an outer sleeve 30, a base 40, a plurality of screw 50, a water proof ring 60, reaches an image sensor (figure does not show).

This camera lens 10 comprises an inner sleeve 100 and is located at lens combination (figure does not show) in it, and inner sleeve 100 is the semi-enclosed cylindrical shape of an end, and its semi-enclosed end is to offer a light hole 104 that is used for transmitted light, and inner sleeve 100 outside surfaces are provided with external thread 102.

Pressing plate 20 is square thin plates, offers a circular mounting hole 200 on it, and the center of circle of this mounting hole 200 overlaps with the intersection of diagonal of pressing plate 20.Offer four equally distributed pilot holes 202 on the pressing plate 20, this four pilot hole 202 is positioned at the edge near mounting hole 200, and its center of circle all is positioned on the diagonal line of pressing plate 20.Also be provided with the projection 204 of four symmetrical distributions on the pressing plate 20, projection 204 is depressed in the one side of pressing plate 20 and protrudes in its another side, and it has elasticity, and four projections 204 lay respectively at the middle part on each limit of square pressing plate 20.

Outer sleeve 30 is a cylindrical shape, and its inner cylinder face is provided with internal thread 302, and external cylindrical surface is provided with a pushing block 304, and the outer ring part spaced set of an end of this outer sleeve 30 has step 306.This step 306 has one first smooth place 307, one first inclined-plane 308 and one second smooth place 309, first inclined-plane 308 is between the first smooth place 307 and the second smooth place 309 and connect, the number of step 306 can be two or more, is 3 in the present embodiment.Camera lens 10 is placed in the outer sleeve 30, and described internal thread 302 cooperates with the external thread 102 of camera lens 10.

Base 40 has a matrix 400 and four extensions 405 that are uniformly distributed on the matrix 400 and extend vertically upward.Matrix 400 is roughly regular hexahedron shape, thus surface thereof open wide and on matrix 400, to form a rectangular aperture 409, offer a round hole 402 that connects with opening 409 on this surperficial apparent surface 401.Have the voussoir 404 of arc, this voussoir 404 to be located on the surface 401 of matrix 400 and perpendicular to this surface 401 along the edge spaced set of perforate 402, the number of the threaded hole on its number and the outer sleeve 30 is corresponding, and cooperates with this threaded hole.Voussoir 404 has one second inclined-plane 403 and a tabular surface 407, and this second inclined-plane 403 connects surface 401 and tabular surface 407.Extension 405 forms for the outside surface 401 from matrix 400 extends upward, it lays respectively at the Si Jiaochu of the outside surface 401 of matrix 400, each extension 405 is rectangular parallelepiped, its predominate dihedral inwardly becomes a cylinder 408, and this cylinder 408 just external cylindrical surface with outer sleeve 30 is corresponding, all offers a threaded hole 406 on each extension 405.The space that these four extensions 405 define just can ccontaining outer sleeve 30, and this threaded hole 406 is aimed at the pilot hole 202 on the pressing plate 20.

Screw 50 can be common trip bolt, is four in this enforcement, and it can cooperate by threaded hole 406, and its diameter is slightly less than pilot hole 202.

Water proof ring 60 is the sealing rubber ring, and its diameter is suitable with outer sleeve 30, and it can be sheathed on outer sleeve 30 lower ends, also can be embedded on the surface of contact of base 40 and outer sleeve 30 lower ends.

Image sensor is a photosensory assembly, and it can be photosensitive coupling component (CCD) or complementary matal-oxide semiconductor (CMOS), and this image sensor is arranged in the matrix 400 of base 40.

See also the 3rd figure, during assembling, camera lens 10 is screwed in the outer sleeve 30 also fixes earlier, the internal thread 302 of outer sleeve 30 cooperates with the external thread 102 of camera lens 10; Water proof ring 50 is placed in outer sleeve 30 lower ends; The outer sleeve 30 that again this is equipped with camera lens 10 is positioned on the base 40, and step 306 is cooperated with voussoir 404, and pushing block 304 is between two extensions 405; Then pressing plate 20 is placed on base 40 and the outer sleeve 30, four projections 204 of pressing plate 20 are conflicted with outer sleeve 30 1 end elasticity, and camera lens 10 passes the mounting hole 200 of pressing plate 20, and threaded hole 406 is aimed at pilot hole 202; Make a plurality of screws 50 pass pilot hole 202 respectively at last, and be tightened against in the threaded hole 406, make pressing plate 20 not deviate from and be fixed on the base 40 from threaded hole 406.

When image distance less and need it is transferred to when big, promote pushing block 304, the elastic force of camera lens 10 that is fixed together and outer sleeve 30 opposing pressing plates 20 upper process 204 rotates, and step 306 rises gradually along the inclined-plane 403 of voussoir 404, camera lens 10 and outer sleeve 30 rise together, thereby make camera lens 10 and outer sleeve 30 in the axis direction displacement of rising, and camera lens 10 increases with the distance of image sensor, be that image distance increases, this moment, the first smooth place 307 of step 306 cooperated with the tabular surface 407 of voussoir 404; As the need image distance hour, promote pushing block 304 in the other direction, its course of action is opposite with the process of the big image distance of above-mentioned accent, be that image distance reduces, this moment, step 306 cooperated with voussoir 404, the first smooth place 307 of step 306 cooperates with surface 401, and first inclined-plane 308 cooperates with second inclined-plane 403, and the second smooth place 309 cooperates with tabular surface 407.

The number that is appreciated that this pilot hole 202, threaded hole 406, screw 50 and extension 405 is not limited to 4, can be any amount more than 2; Step 306 and voussoir 404 can only have an inclined-plane respectively and not have smooth place and tabular surface.

Claims

1. two-part focusing mechanism, comprise a camera lens, one outer sleeve, one base, lens jacket is located in the outer sleeve, camera lens and outer sleeve relative fixed, it is characterized in that: described base has a matrix, vertically extend a plurality of extensions on this matrix and form an accommodation space, outer sleeve is contained in the accommodation space of base, this two-part focusing mechanism further comprises a pressing plate and a water proof ring, this water proof ring is placed in the outer sleeve lower end, described outer sleeve bottom is formed with step, base is provided with the voussoir that matches with described outer sleeve step, this pressing plate has the one side that is depressed in pressing plate and the projection that protrudes in its another side, and the affixed and described projection of this pressing plate and described extension flexibly compresses outer sleeve, and outer sleeve can rotate with respect to base.

2. two-part focusing mechanism as claimed in claim 1 is characterized in that: this outer sleeve is a cylindrical shape, and its external cylindrical surface is provided with a pushing block, and described step spaced set is in an end of outer sleeve.

3. two-part focusing mechanism as claimed in claim 2 is characterized in that: this voussoir spaced set is on base, and its number is corresponding with step on the outer sleeve.

4. two-part focusing mechanism as claimed in claim 3 is characterized in that: this step has two smooth places and an inclined-plane, and this inclined-plane connects this two smooth place, and this voussoir has a tabular surface and an inclined-plane.

5. two-part focusing mechanism as claimed in claim 2 is characterized in that: this pressing plate is provided with a mounting hole and four pilot holes, and outer sleeve passes this mounting hole, and this pilot hole is used for fixing pressing plate.

6. two-part focusing mechanism as claimed in claim 5 is characterized in that: this pressing plate is square thin plate, and the center of circle of this mounting hole overlaps with the intersection of diagonal of pressing plate, and this four pilot hole is positioned at the edge near mounting hole.

7. two-part focusing mechanism as claimed in claim 5 is characterized in that: this base is provided with a plurality of threaded holes, and threaded hole can be aimed at described pilot hole.

8. two-part focusing mechanism as claimed in claim 7 is characterized in that: the two-part focusing mechanism further comprises a plurality of screws, and described screw can pass pilot hole and cooperate with threaded hole.

9. two-part focusing mechanism as claimed in claim 7 is characterized in that: described extension is the rectangular structure with cylinder, is distributed in the Si Jiaochu of matrix.

10. two-part focusing mechanism as claimed in claim 1, it is characterized in that: described matrix is roughly hexahedron, thereby surface thereof is opened wide and form an opening on matrix, offer a perforate that connects with opening on this surperficial opposite face, this voussoir extends towards matrix is outside along the vertical direction of the face of offering perforate.

11. two-part focusing mechanism as claimed in claim 1 is characterized in that: this camera lens outside surface is provided with external thread, and the outer sleeve inwall is provided with the internal thread that matches with the camera lens external thread, and this camera lens is spirally connected by the internal thread and the outer sleeve of external thread and outer sleeve.

12. two-part focusing mechanism as claimed in claim 1 is characterized in that: this camera lens is a cylindrical shape, includes the light hole of being located at the lens combination in it and being used for transmitted light.

13. two-part focusing mechanism as claimed in claim 1 is characterized in that: this water proof ring is anti-to be the sealing rubber ring.