CN217060598U - Lens with core adjusting function - Google Patents

Abstract

The utility model discloses a camera lens that possesses accent core function, including preceding lens cone, back lens cone. The two ends of the front lens cone are respectively provided with an embedding end and an object approaching end, and the outer peripheral wall of the embedding end is convexly provided with a precision compensation part; the back lens cone both ends are provided with notch end and link respectively, and the notch end is provided with inlays the groove, inlays the end and inlays the inslot along the axial embedding of back lens cone, and precision compensation portion and the internal perisporium butt of inlaying the groove inlay the periphery wall of end and the internal perisporium fixed connection who inlays the groove. The front lens barrel and the rear lens barrel are connected through the embedding groove and the embedding end which are mutually nested, so that the lens is more miniaturized, and the precision compensation part compensates for the radius error between the embedding groove and the embedding end; in the nesting process, the front lens cone can be adjusted to move relative to the rear lens cone in the axial direction according to the optical imaging condition, and accurate and quick core adjustment is performed through adjusting equipment on the basis of ensuring that the lens group of the front lens cone relative to the rear lens cone is coaxial, so that the preset standard is reached.

Description

Lens with aligning function

Technical Field

The utility model relates to a camera lens technical field, in particular to camera lens that possesses accent core function.

Background

The imaging effect of an optical lens (such as a projector lens, a camera lens, etc.) is very sensitive to the assembling relationship between the system lenses, and the imaging quality of the whole lens is rapidly reduced due to slight eccentricity between the lenses, so that for such a lens, the lens group at the sensitive part of the optical system needs to be adjusted and corrected relative to other lens groups during production, for example, the axial distance between the lens group at the sensitive part and other lens groups is adjusted, and the lens group at the sensitive part may need to be rotated relative to other lens groups, and the lens or the lens group is relatively fixed after adjustment and correction to complete lens assembly, so that the imaging quality of the whole lens meets the design requirements. The adjustment of the distance and the lateral deviation angle in the lens assembling process is referred to as alignment in the industry.

The traditional lens assembly structure is mostly in a thread type or a cam cylinder type, is limited by the restriction of processing technology and limit precision, and the precision of the components such as form and position tolerance, the surface shape of the lens, surface eccentricity and the like cannot meet the design expected requirement. This has led to the fixed accent core action of assembling back of screw thread formula and cam cylinder lens to receive very big influence, and the angle of assembling at every turn with the center as the axle is different, and the machining precision of screw thread is general relatively poor, has certain not hard up clearance volume after the equipment, has brought more bad factor for optical imaging, and the lens group of the sensitive position of optical system can't carry out eccentric adjustment after assembling along the axial. Generally, in order to rotate the adjustment structure, a fixing structure is required to be added to the whole lens set, for example, a lateral locking screw is used for fixing, which increases the total weight and increases the volume, and a slight error in center of gravity shift between the lenses and the lens barrel causes a large eccentricity, resulting in a decrease in resolution, so that the fit clearance and the overlay tolerance are increased accordingly, and the problems such as image blur, optical axis shift, and image plane tilt are easily caused by the external force.

Therefore, how to reduce the error in assembly and improve the resolution as much as possible becomes a problem to be solved in the production process of the optical lens.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a camera lens that possesses accent core function to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a camera lens with a core adjusting function, which comprises a front lens cone and a rear lens cone. An embedding end and an object approaching end are respectively arranged at two ends of the front lens cone, and a precision compensation part is convexly arranged on the outer peripheral wall of the embedding end; the back lens cone both ends are provided with notch mouth end and link respectively, and the notch end is provided with inlays the groove, inlays the end and inlays the inslot along the axial embedding of back lens cone, precision compensation portion and the internal perisporium butt of inlaying the groove, inlay the periphery wall of end and the internal perisporium fixed connection who inlays the groove.

The beneficial effects of the utility model are that:

when the utility model is assembled, the connecting end is used for being fixed on other structures, the connection between the front lens cone and the rear lens cone is mutually nested through the embedding groove and the embedding end, the effective matching distance of the front lens cone and the rear lens cone is increased, the stress influence caused by gravity center swing of the front lens cone is well dispersed, the requirement on the material strength of the front lens cone is reduced, the lens is more miniaturized, the precision compensation part compensates the radius error between the embedding groove and the embedding end, the assembling precision is higher, and the resolving power is better; in the nesting process, the front lens barrel can be adjusted to move relative to the rear lens barrel in the axial direction according to the optical imaging condition, accurate and quick core adjustment can be performed through the adjusting device on the basis that the coaxiality of the lens group of the front lens barrel relative to the rear lens barrel is guaranteed, the front lens barrel can also be rotated relative to the rear lens barrel, and nesting is performed to enable the resolving power of the lens group on the front lens barrel and the rear lens barrel to be higher, so that the preset standard is achieved. And finally, the outer peripheral wall of the embedded end is fixedly connected with the inner peripheral wall of the embedded groove, so that the front lens barrel is not easy to incline and loosen relative to the rear lens barrel, and the uniform assembly of the lens is finally completed.

As above-mentioned technical scheme's further improvement, inlay through first glue fixed part fixed connection between the periphery wall of end and the internal perisporium of inlaying the groove, it is less with the interval of inlaying between the internal perisporium of groove that the periphery wall of end inlays in the reality, glue can be along the inside interval of interval infiltration, solidifies and forms first glue fixed part, and the mobility of glue makes fixed area big, and fixed effect is better, and is fixed also more convenient.

As a further improvement of the technical scheme, a gap is arranged between the end face of the embedding end and the groove bottom of the embedding groove, the front lens barrel moves in the axial direction relative to the rear lens barrel, therefore, the gap is formed during assembly, and the size of the gap is determined according to the actual axial adjustment result.

As the further improvement of the technical scheme, a plurality of groups of compensation parts are arranged at intervals along the circumferential direction of the peripheral wall of the embedded end, each group of compensation parts comprises a plurality of precision compensation parts, lens groups on the front lens barrel and the rear lens barrel are better positioned on the same optical axis, the error is smaller, and the resolving power is better.

As the further improvement of the technical scheme, the precision compensation part is provided with the arc-shaped contact surface which is abutted against the inner peripheral wall of the embedding groove, so that the contact area is increased, the front lens cone is not easy to incline and loosen relative to the rear lens cone, the assembling precision is higher, and the resolution force is better.

As the further improvement of above-mentioned technical scheme, the tank bottom of inlaying the groove is provided with the light ring fixed part that sets up along the axial extension of back lens cone, inlays the end and is provided with the opening towards the recess of light ring fixed part, and the light ring fixed part stretches into in the recess for the camera lens is more miniaturized, protects the structure on the light ring fixed part simultaneously.

As the further improvement of the technical scheme, the inner peripheral wall of the embedding groove is provided with a plurality of inner steps at annular equal intervals by taking the axial direction of the rear lens cone as the center, the outer peripheral wall of the embedding end is provided with a plurality of clamping blocks which take the central shaft of the front lens cone as the center and are arranged at annular intervals, and the clamping blocks are in one-to-one corresponding sliding clamping with the inner steps.

The clamping block is clamped with the inner step, so that the front lens barrel is further prevented from axially falling off from the rear lens barrel, and the structural stability is improved. In addition, in the production process, after the first lens is adjusted, the resolution is better for the lenses of the same batch, the subsequent lenses of the batch do not need to be adjusted again, the lenses can be assembled at the same angle, and the assembly efficiency is higher.

As the further improvement of the technical scheme, the clamping block is provided with a gluing groove, a second glue fixing part is arranged between the gluing groove and the inner step, and the front lens barrel and the rear lens barrel are further fixed.

As a further improvement of the technical scheme, a plurality of gaps are annularly arranged at the object-approaching end at intervals, so that the mechanical clamping jaw can conveniently grab and position in an automatic process, and the corresponding nesting angle of the front lens cone and the rear lens cone can be better determined.

As a further improvement of the technical scheme, the lens cone compression ring is in threaded connection with the object-near end, so that the effect of protecting the front lens group of the front lens cone is achieved.

Drawings

The invention will be further described with reference to the accompanying drawings and examples;

fig. 1 is a schematic structural view of an embodiment of a lens with a function of adjusting a core according to the present invention;

fig. 2 is an exploded view of an embodiment of a lens with a function of adjusting a lens barrel according to the present invention;

fig. 3 is a schematic view of a front lens barrel according to an embodiment of the present invention, the front lens barrel having a function of adjusting a core;

fig. 4 is a schematic view of an explosion cross-section structure of an embodiment of a lens with a function of adjusting a core according to the present invention;

fig. 5 is a schematic cross-sectional view of a lens with a function of adjusting a core according to an embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, the preferred embodiments of which are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can visually and vividly understand each technical feature and the whole technical solution of the present invention, but it cannot be understood as a limitation to the scope of the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 5, the lens with the function of aligning according to the present invention includes:

in some embodiments, a camera lens that possesses alignment function, camera lens have the optical axis, including front lens cone 100, back lens cone 200, be provided with first group lens in the front lens cone 100, back lens cone 200 is provided with the second group lens, the utility model provides a after front lens cone 100, back lens cone 200 assemble, assembly error is little, the resolving power is higher, and the structure is more miniaturized, applicable in each field such as control, miniature medical monitoring instrument, lightweight unmanned aerial vehicle. The both ends of preceding lens cone 100 are provided with respectively and inlay end and nearly object end, and back lens cone 200 both ends are provided with notch end and link respectively, and the link can set up the external screw thread for fixed whole camera lens, notch end are provided with inlays groove 210, inlay the end and inlay in groove 210 along the axial embedding of back lens cone 200. When assembling the lens, the connecting end is used for fixing on other structures, and the connection between the front lens cone 100 and the rear lens cone 200 is nested with the embedding end through the embedding groove 210, so that the effective distance of the cooperation of the front lens cone 100 and the rear lens cone 200 is increased, the stress influence caused by the gravity center swing of the front lens cone 100 is well dispersed, the requirement on the material strength of the front lens cone 100 is reduced, and the lens is more miniaturized. Therefore, the structure has low requirement on allowable stress of the material of the front barrel 100, the front barrel can be made of materials with certain rigidity, such as PC, PA, PPS, aluminum alloy and the like, and the overall weight is reduced while the effects of vibration resistance and impact resistance are reduced.

In order to improve the precision, a plurality of precision compensation parts 110 are convexly arranged on the outer peripheral wall of the embedding end, the precision compensation parts 110 are abutted against the inner peripheral wall of the embedding groove 210, and the precision compensation parts 110 compensate the radius error between the embedding groove 210 and the embedding end, so that the assembling precision is higher, and the resolving power is better. Specifically, be provided with multiunit compensation portion group along the periphery wall circumference interval of inlaying the end, every compensation portion group all includes a plurality of precision compensation portions 110, and the equipartition interval sets up and makes the interact power between front lens cone 100, the back lens cone 200 more even to lens group on front lens cone 100, the back lens cone 200 is located same optical axis better, and the error is littleer, and then the resolving power is better. Each precision compensation portion 110 is provided with an arc-shaped contact surface 111, the arc-shaped contact surface 111 abuts against the inner peripheral wall of the embedding groove 210, contact area is increased, the front lens barrel is not easy to incline and loosen relative to the rear lens barrel, and therefore assembly precision is higher, and resolving power is better.

In the nesting process, the front lens barrel 100 can be adjusted to move relative to the rear lens barrel 200 in the axial direction according to the optical imaging condition, on the basis of ensuring that the lens group of the front lens barrel 100 relative to the rear lens barrel 200 is coaxial, the front lens barrel 100 can be accurately and quickly aligned through adjusting equipment, the front lens barrel 100 can also be rotated relative to the rear lens barrel 200, and then nesting is carried out, so that the resolving power of the lens group on the front lens barrel 100 and the rear lens barrel 200 is higher, and the preset standard is achieved.

Finally, the outer peripheral wall of the embedded end is fixedly connected with the inner peripheral wall of the embedded groove 210, so that the front lens barrel 100 is not easy to incline and loose relative to the rear lens barrel 200, and the unified assembly of the lenses is finally completed. Wherein inlay the periphery wall of end and inlay the internal perisporium accessible welded fastening of groove 210, also available first glue fixed part is fixed, and the interval between the periphery wall of inlaying the end and the internal perisporium of inlaying the groove is less in the reality, and glue can be along the inside interval of interval infiltration, and glue solidifies and forms first glue fixed part, and the mobility of glue makes fixed area big, and fixed effect is better, and is fixed also more convenient. The glue is preferably a low-expansion and high-strength glue, such as a UV glue, and in practical production, the glue can be dispensed and fixed by a dispenser.

In addition, the front barrel 100 moves axially relative to the lens group of the rear barrel 200, i.e. axial alignment, so that a gap 220 is formed during assembly, the size of the gap 220 is determined according to the actual axial alignment result, and the embedding slot 210 reserves an alignment moving interval specifically according to the optical simulation result.

Further, the inner circumferential wall of the embedding groove 210 is provided with three inner steps 230 at annular intervals around the axial direction of the rear lens barrel 200, the outer circumferential wall of the embedding end is provided with three clamping blocks 130 at annular intervals around the axial direction of the front lens barrel 100, and the clamping blocks 130 are in one-to-one sliding clamping with the inner steps 230. The clamping block 130 is clamped with the inner step 230, so that the front lens barrel 100 is further prevented from axially falling off from the rear lens barrel 200, and the structural stability is improved. In addition, three modes of the three clamping blocks 130 and the three inner steps 230 are in staggered clamping, and during assembly, the best one mode of the resolution force can be selected according to actual conditions for butt joint. Therefore, in the production process, after the first lens is adjusted, the resolution is better for the lenses of the same batch, the subsequent lenses of the batch are butted in the same butting mode, the lenses can be assembled at the same angle, and the assembly efficiency is higher. In addition, in order to facilitate the mechanical clamping jaw to grab and position, a plurality of notches 140 are annularly arranged at intervals at the object-near end, and the number of the notches 140 is preferably set to correspond to the number of the clamping blocks 130, so that the number of the positioning modes is consistent with the number of the staggered assemblies, and the corresponding nesting angles of the front lens barrel 100 and the rear lens barrel 200 are better determined.

Further, in order to fix the front barrel 100 and the rear barrel 200 better, the clamping block 130 is provided with a glue applying groove 131, and a second glue fixing portion is arranged between the glue applying groove 131 and the inner step 230 to further fix the front barrel 100 and the rear barrel 200. The second glue fixing portion is also glue with low expansion rate and high strength, specifically, UV glue can be adopted, in actual production, a glue dispenser can be used for extruding the glue into the glue applying groove 131, and the glue is bonded on the inner wall of the glue applying groove 131 and the inner wall of the inner step 230. In order to eliminate the error between the clamping block 130 and the inner step 230, a precision compensation diameter is further provided, the precision compensation diameter is disposed on two sides of the clamping block 130, the precision compensation diameter is provided with an abutting surface extending along the axial direction of the front lens barrel 100, and the abutting surface abuts against the left and right side walls of the inner step 230, so that the error is reduced.

It should be noted that the more the number of the inner steps 230 and the clamping blocks 130 is set, the more the way of the staggered nested butting is, which is determined by the factors such as the optical simulation result and the actual precision of the produced product.

Finally, in order to protect the front lens group of the front lens barrel 100, a lens barrel compression ring 300 is connected to the object-near end in a threaded manner, an annular step 121 is arranged on the outer peripheral wall of the notch end, and the lens barrel compression ring 300 extends into the annular step 121. In order to further miniaturize the lens, the bottom of the embedding groove 210 is provided with a diaphragm fixing portion 211 extending along the axial direction of the rear lens barrel 200, the embedding end is provided with a groove 120 with an opening facing the diaphragm fixing portion 211, and the diaphragm fixing portion 211 extends into the groove 120, so that the lens is further miniaturized, and the structure on the diaphragm fixing portion 211 is protected.

The lens of this embodiment realizes axial relative movement through the cooperation of inside and outside footpath, on guaranteeing with the concentric basis of optical axis, carries out accurate, quick accent core through adjusting device, both can compensate lens interval difference, can rectify the aberration again, the resolving power is better.

While the preferred embodiments of the present invention have been described in detail, it is to be understood that the invention is not limited thereto, and that various equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and the equivalents thereof are intended to be encompassed by the scope of the appended claims.

Claims (10)

1. A lens having a function of aligning a lens, comprising:

the lens barrel comprises a front lens barrel (100), wherein two ends of the front lens barrel are respectively provided with an embedded end and an object approaching end, and the outer peripheral wall of the embedded end is convexly provided with a precision compensation part (110);

back lens cone (200), its both ends are provided with slotted end and link respectively, the slotted end is provided with inlays groove (210), it follows to inlay the end the axial embedding of back lens cone (200) inlay in groove (210), precision compensation portion (110) with inlay the internal perisporium butt in groove (210), inlay the periphery wall of end with inlay the internal perisporium fixed connection in groove (210).

2. The lens with the function of adjusting the center of the lens according to claim 1, wherein:

the outer peripheral wall of the embedding end is fixedly connected with the inner peripheral wall of the embedding groove (210) through a first glue fixing part.

3. The lens with the function of adjusting the center of the lens according to claim 1, wherein:

a gap (220) is arranged between the end surface of the embedding end and the bottom of the embedding groove (210).

4. The lens with the function of adjusting the center of the lens according to claim 1, wherein:

a plurality of compensation part groups are arranged at intervals along the circumferential direction of the outer circumferential wall of the embedding end, and each compensation part group comprises a plurality of precision compensation parts (110).

5. The lens with the function of adjusting the center of a lens according to claim 1 or 4, wherein:

the precision compensation portion (110) is provided with an arc-shaped contact surface (111), and the arc-shaped contact surface (111) is abutted to the inner peripheral wall of the embedding groove (210).

6. The lens with the function of adjusting the center of the lens according to claim 1, wherein:

the cell bottom of inlaying groove (210) is provided with along the axial extension of back lens cone (200) sets up diaphragm fixed part (211), it is provided with the opening orientation to inlay the end recess (120) of diaphragm fixed part (211), diaphragm fixed part (211) stretch into in recess (120).

7. A lens barrel with a function of adjusting a core according to claim 1 or 6, wherein:

inlay the internal perisporium in groove (210) with the axial of back lens cone (200) is cyclic annular equidistance interval as the center and is provided with a plurality of interior steps (230), the periphery wall of inlaying the end be provided with the center pin of preceding lens cone (100) is center, is a plurality of joint pieces (130) that cyclic annular interval set up, joint piece (130) with interior step (230) one-to-one slip joint.

8. The lens with the function of adjusting the core according to claim 7, wherein:

the clamping block (130) is provided with a glue beating groove (131), and a second glue fixing portion is arranged between the glue beating groove (131) and the inner step (230).

9. The lens with the function of adjusting the core according to claim 7, wherein:

the object approaching end is provided with a plurality of gaps (140) at intervals in a ring shape.

10. The lens with the function of adjusting the core according to claim 1, characterized in that:

the near object end is in threaded connection with a lens cone compression ring (300).

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