CN102445742A

CN102445742A - Zoom lens barrel mechanism

Info

Publication number: CN102445742A
Application number: CN201010517972XA
Authority: CN
Inventors: 黄俊泓
Original assignee: Asia Optical Co Inc
Current assignee: Asia Optical Co Inc
Priority date: 2010-10-12
Filing date: 2010-10-12
Publication date: 2012-05-09

Abstract

The invention relates to a zoom lens barrel mechanism, comprising a first lens barrel and a second lens barrel, wherein the first lens barrel is provided with a bumping and a slide block of a quadrilateral structure; the second lens barrel is arranged at the external side of the first lens barrel and provided with a first track, a second track and a third track which are connected together. When the first lens barrel rotates around the central axis direction, the bumping and the slide block slide in the first and the second tracks respectively, then the first lens barrel is enabled to displace with respect to the second lens barrel along the central axis direction. When the bumping and the slide block slide in the third track, the first lens barrel can only rotate around the central axis without moving along the central axis.

Description

Zoom lens barrel mechanism

Technical field

The present invention relates to a kind of zoom lens barrel mechanism, particularly a kind of telescopic zoom lens barrel mechanism that is arranged on the camera.

Background technology

At first see also Fig. 1; The telescopic zoom lens that is adopted on the existing digital camera 100 mainly is made up of 11,12,13,14 of a plurality of lens barrels; Wherein lens barrel 11～14 is connected in the fuselage 10 of digital camera 100 with telescopic mode; Take the scenery of different distance and when needing the focal length of adjustment digital camera 100, aforementioned lens barrel 11～14 can pass through its inner cam or screw mechanism when desire, make it can be along central shaft C1 direction telescopic moving (shown in the direction of arrow among Fig. 1).

Traditional telescopic zoom lens often receives the external force collision easily and damages, and its main cause is the syndeton undercapacity between each lens barrel.In view of this, how to improve the mechanism design of existing telescopic zoom lens and the bindiny mechanism that strengthens between each lens barrel becomes important problem the beginning.

Summary of the invention

The technical matters that the present invention will solve is, to the defective of the syndeton undercapacity between each lens barrel of telescopic zoom lens in the prior art, a kind of zoom lens barrel mechanism is provided, and can strengthen the connection between each lens barrel.

The technical solution adopted for the present invention to solve the technical problems is, a kind of zoom lens barrel mechanism is provided, and it mainly comprises first lens barrel and second lens barrel, and aforementioned first lens barrel has at least one projection and slide block, and wherein slide block has quadrilateral structure.Aforementioned second lens barrel is sheathed on first lens barrel outside, and has first, second and the 3rd track that is connected.When relative second lens barrel of first lens barrel when central axis direction rotates, projection and slide block respectively at sliding in first, second track so that relative second lens barrel of first lens barrel along the central axis direction displacement.When projection and slide block slipped into the 3rd track by first, second track, first lens barrel only was fixed in the predeterminated position on the central shaft around the central shaft rotation and with respect to this second lens barrel.

In an embodiment, aforementioned slide block has two planes, is positioned at the opposition side of slide block, and when zoom lens barrel mechanism received an external force collision, aforementioned plane contacted with the inwall of the 3rd track both sides respectively, breaks away from second lens barrel to prevent first lens barrel.

In an embodiment, aforementioned slide block has a wedge shape section, and second track has an inclined-plane, wedge shape section and the inclined-plane distance of being separated by.

In an embodiment, aforementioned projection has a pyramidal structure.

In an embodiment, aforementioned quadrilateral structure has an end face, and aforementioned end face is a parallelogram.

In an embodiment, form an obtuse angle between aforementioned second, third track.

In an embodiment, aforementioned first, second track is rectilinear orbit and is parallel to each other.

In an embodiment, aforementioned second lens barrel is fixed on the fuselage of a camera or video camera.

In an embodiment, aforementioned first lens barrel has more plurality of bump and a plurality of slide block, and the inner surface of second lens barrel has more a plurality of first, second and the 3rd tracks, corresponding to aforementioned projection and slide block.

In an embodiment, aforementioned projection and slide block are symmetrical in central shaft.

The zoom lens barrel mechanism of embodiment of the present invention; Have following beneficial effect: moving in track by projection to make the function that reaches flexible zoom between first, second lens barrel; And; By butt each other between the slide block of quadrilateral structure and the aforementioned track, can effectively avoid zoom lens barrel mechanism because of suffering external force collision or very do not drop the damage that is caused, and then can significantly promote the security in the use.

For making above-mentioned purpose of the present invention, characteristic and the advantage can be more obviously understandable, hereinafter is special lifts preferred embodiment and conjunction with figs. elaborates.

Description of drawings

Fig. 1 representes that existing digital camera or video camera are provided with the synoptic diagram of telescopic zoom lens;

Fig. 2 representes the zoom lens barrel structural scheme of mechanism of one embodiment of the invention; And

Fig. 3 representes that the zoom lens barrel mechanism of one embodiment of the invention is in the synoptic diagram of contraction state;

Fig. 4 representes that first lens barrel in the zoom lens barrel mechanism protrudes from the synoptic diagram of second lens barrel;

Fig. 5 A representes the first lens barrel vertical view of one embodiment of the invention;

Fig. 5 B representes the first lens barrel side view of one embodiment of the invention;

Fig. 6 representes that projection and slide block are positioned at the synoptic diagram of groove;

Fig. 7 A representes that projection and slide block lay respectively at the synoptic diagram in first, second track;

Fig. 7 B representes along the part sectioned view of X1-X2 direction among Fig. 7 A;

Fig. 7 C representes along the part sectioned view of X3-X4 direction among Fig. 7 A; And

Fig. 8 representes that projection and slide block are positioned at the synoptic diagram of the 3rd track.

Embodiment

See also Fig. 2; The zoom lens barrel mechanism of one embodiment of the invention can be applicable on camera or the video camera; It mainly comprises first lens barrel 21 and second lens barrel 22 of hollow, and aforementioned second lens barrel 22 for example can be fixed on the fuselage of camera or video camera, and 21 of first lens barrels are to be arranged on second lens barrel, 22 inboards with telescopic mode; When desire is taken the scenery of different distance; Can make first lens barrel 21 around central shaft C2 rotation, and then first lens barrel 21 is moved along central shaft C2 direction relative to second lens barrel 22, use the purpose that reaches the focusing/zooming distance.What need special instruction is; At first lens barrel 21 in the process of central shaft C2 rotation; Projection 211 on first lens barrel, 21 outer surfaces slides along first, second track R1, the R2 of second lens barrel, 22 inner surfaces respectively with slide block 212 meetings; Can force first lens barrel 21 to move along aforementioned central shaft C2 direction relative to second lens barrel 22 by this, wherein the position of first, second track R1, R2 is adjacent and be parallel to each other.

Please consult Fig. 3,4 in the lump, when aforementioned varifocal mirror tube mechanism was in contraction state, first lens barrel 21 was hidden in second lens barrel, 22 inboards (as shown in Figure 3); On the contrary, when first lens barrel 21 rotated an angle around central shaft C2,21 of first lens barrels can move along central shaft C2 direction relative to second lens barrel 22, used making first lens barrel 21 protrude from second lens barrel 22 (shown in the direction of arrow among Fig. 4).

Then see also Fig. 5 A, 5B; Be formed with three groups of projection 211 and slide blocks 212 that are symmetrical in central shaft C2 on first lens barrel, 21 outer surfaces in the present embodiment; Aforementioned projection 211 has pyramidal structure; 212 of slide blocks and projection 211 are adjacent and have quadrilateral structure, wherein an end face parallelogram of this quadrilateral structure (shown in Fig. 5 B).See also Fig. 6 again, when zoom lens barrel mechanism was in contraction state, projection 211 on first lens barrel 21 and slide block 212 were positioned at the recess R 0 of first, second track R1, R2 below; Wherein, When first lens barrel, 21 relative second lens barrels 22 when central shaft C2 rotates; Projection 211 and slide block 212 can get into respectively in first, second track R1, R2 of structure linearly, and slide (shown in the direction of arrow among Fig. 7 A) along first, second track R1, R2, and the guiding that the projection 211 on this moment first lens barrel 21 can receive the first track R1 raises; Make the lens barrel 21 of winning to protrude from second lens barrel 22 gradually, use the purpose that reaches the focusing/zooming distance.

Shown in Fig. 7 B; When aforementioned projection 211 gets in the first track R1; The inclined-plane of projection 211 both sides can with the surperficial driving fit of the first track R1, but by this accuracy of lifter motion track with stability, and since present embodiment in projection 211 have pyramidal structure; So, and help the elasticity in the hoisting gear design applicable to various forms of tracks (for example straight line or warp rail).See also Fig. 7 C again; Aforementioned slide block 212 has a wedge shape section; When slide block 212 gets in the second track R2; Slide block 212 can't with the complete driving fit of the second track R2, wherein be separated by one respectively apart from d between the inclined-plane R21 of the wedge shape section and the second track R2 both sides, interfere and cause mechanism to damage but produce when headspace moves in warp rail to avoid slide block 212 by this.

See also Fig. 8 again; Along with first lens barrel 21 continues to rotate around central shaft C2; Aforementioned projection 211 can be got in the 3rd track R3 by first, second track R1, R2 respectively with slide block 212, and this moment, first lens barrel 21 only can merely can't move along central shaft C2 direction around central shaft C2 rotation; In other words, first lens barrel 21 only is fixed in the predeterminated position of central shaft C2 around central shaft C2 rotation and relative second lens barrel 22.What need special instruction is; Be formed with an obtuse angle θ between aforementioned second, third track R2, the R3; When projection 211 gets in the 3rd track R3 with slide block 212; The position of first lens barrel 21 has protruded from second lens barrel 22 (as shown in Figure 4); This moment is if zoom lens barrel mechanism is subjected to axial force bump, the planar S 1 that then can be parallel to each other through slide block 212 upper and lower both sides, S2 respectively with inwall R31, the R32 of the upper and lower both sides of the 3rd track R3 be in contact with one another against, use preventing that projection 211 from being caused first,

second lens barrel

21,22 to separate with slide block 212 by knocking-on the 3rd track R3.

Be difficult to the structural strength that provides preferable because the projection 211 of cone structure and the contact area between the 3rd track R3 are less; The present invention in addition first lens barrel, 21 outer surfaces set up one have a quadrilateral structure slide block 212; Thus when projection 211 gets in the 3rd track R3 with slide block 212; Can produce bigger contact area through planar S 1, S2 and the 3rd track R3 of slide block 212 both sides; Use effective opposing external force collision, and then can prevent that projection 211 and slide block 212 break away from the 3rd track R3.

In sum; The present invention mainly provides a kind of zoom lens barrel mechanism; First lens barrel and second lens barrel that comprise hollow; Aforementioned first lens barrel is provided with at least one group of projection and slide block, then is provided with a plurality of corresponding tracks on aforementioned second lens barrel, and wherein moving in track by projection to make the function that reaches flexible zoom between first, second lens barrel.In particular, the present invention is by butt each other between the slide block of quadrilateral structure and the aforementioned track, can effectively avoid zoom lens barrel mechanism because of suffering external force collision or very do not drop the damage that is caused, and then can significantly promote the security in the use.

Though the present invention discloses as above with aforesaid embodiment, it is not in order to limit the present invention.Those skilled in the art person is not breaking away from the spirit and scope of the present invention, can do a little change and retouching.Therefore protection scope of the present invention is as the criterion when looking the claim person of defining.

Claims

1. a zoom lens barrel mechanism is characterized in that, comprising:

First lens barrel has at least one projection and slide block, and wherein this slide block has quadrilateral structure; And

Second lens barrel is sheathed on this first lens barrel outside versatilely, and wherein this second lens barrel has first track, second track and the 3rd track, and this first, second track is adjacent and be connected with the 3rd track;

When this first lens barrel when central axis direction rotates, this projection and this slide block be respectively at sliding in this first, second track so that this first lens barrel relatively this second lens barrel along this central axis direction displacement;

When this projection and this slide block slipped into the 3rd track by this first, second track, this first lens barrel only was fixed in the predeterminated position on this central shaft around this central shaft rotation and with respect to this second lens barrel.

2. the described zoom lens barrel of claim 1 mechanism; It is characterized in that; This slide block has two planes, lays respectively at the reciprocal both sides of this slide block, when this zoom lens barrel mechanism receives external force collision; These planes contact with the inwall of the 3rd track both sides respectively, break away from this second lens barrel to prevent this first lens barrel.

3. zoom lens barrel as claimed in claim 1 mechanism is characterized in that this slide block has wedge shape section, and this second track has the inclined-plane, this wedge shape section and this inclined-plane distance of being separated by.

4. the described zoom lens barrel of claim 1 mechanism is characterized in that, this projection has pyramidal structure.

5. the described zoom lens barrel of claim 1 mechanism is characterized in that, this quadrilateral structure has end face, and this end face is a parallelogram.

6. the described zoom lens barrel of claim 1 mechanism is characterized in that, forms the obtuse angle between this second, third track.

7. the described zoom lens barrel of claim 1 mechanism is characterized in that, this first, second track is rectilinear orbit and is parallel to each other.

8. the described zoom lens barrel of claim 1 mechanism is characterized in that, this second lens barrel is fixed on the fuselage of camera or video camera.

9. the described zoom lens barrel of claim 1 mechanism; It is characterized in that; This first lens barrel has more plurality of bump and a plurality of slide block, and the inner surface of this second lens barrel has more a plurality of first, second and the 3rd tracks, corresponding to those projections and those slide blocks.

10. the described zoom lens barrel of claim 1 mechanism is characterized in that, those projections and those slide blocks are symmetrical in this central shaft.