CN116299944A

CN116299944A - Automatic focusing lens module

Info

Publication number: CN116299944A
Application number: CN202310263060.1A
Authority: CN
Inventors: 毛才荧; 李巧; 吴建午
Original assignee: Dongguan Yutong Optical Technology Co Ltd
Current assignee: Dongguan Yutong Optical Technology Co Ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-06-23
Anticipated expiration: 2043-03-17

Abstract

The invention belongs to the technical field of optical lenses, and discloses an automatic focusing lens module, which comprises a fixed seat, a lens module and a driving piece. The lens module comprises an adjusting ring and a lens assembly, the adjusting ring is rotationally arranged on the periphery of the lens assembly, the lens assembly is arranged on the fixed seat, the driving piece comprises a driving motor and a reduction gearbox, and the driving piece is movably connected with the fixed seat through the reduction gearbox, so that the output gear can be meshed with or separated from a large gear of the adjusting ring by moving the reduction gearbox. When the automatic focusing lens module is installed, the reduction gearbox is moved to separate the output gear from the large gear, so that the pre-focusing of the lens module can be realized, and after the pre-focusing is finished, the lens assembly after the pre-focusing and the fixing seat can be fixed by the fixing structure; and then the reduction gearbox is moved to enable the output gear to be meshed with the large gear, so that the automatic focusing lens module is automatically focused under the action of the driving motor.

Description

Automatic focusing lens module

Technical Field

The present invention relates to the field of optical lenses, and more particularly, to an automatic focusing lens module.

Background

The automatic focusing lens module is characterized in that the driving motor drives the adjusting ring to rotate through the reduction gearbox, so that the automatic focusing of the automatic focusing lens module is realized, but before automatic focusing, the lens module needs to be subjected to pre-focusing firstly, namely, before the reduction gearbox is meshed with the adjusting ring, the relative position between the integral lens module and the fixing seat is adjusted firstly. In the prior art, the reducing gear box is connected to the fixing seat through the screw so as to realize the meshing of the reducing gear box and the adjusting ring, and the structure ensures that the relative position between the reducing gear box and the fixing seat can not be adjusted after the reducing gear box is installed on the fixing seat, so that the pre-focusing can only be completed before the reducing gear box is installed, and if the pre-focusing can not meet the use requirement after the installation is completed, the reducing gear box is required to be disassembled for completion, and the use is inconvenient.

Disclosure of Invention

The invention aims to provide an automatic focusing lens module, wherein a reduction gearbox is movably connected with a fixed seat, and can be subjected to pre-focusing operation after the whole structure is installed, and the reduction gearbox can be separated from the fixed seat without disassembling a screw.

To achieve the purpose, the invention adopts the following technical scheme:

an autofocus lens module comprising:

a fixing seat;

the lens module comprises an adjusting ring and a lens assembly, wherein the adjusting ring is rotationally arranged on the periphery of the lens assembly, and the lens assembly is arranged on the fixing seat;

the driving piece comprises a driving motor and a reduction gearbox, a large gear is arranged on the outer peripheral surface of the adjusting ring, the reduction gearbox is provided with an output gear, the reduction gearbox is movably connected with the fixing seat, the reduction gearbox can drive the output gear to be meshed with or separated from the large gear, when the output gear is separated from the large gear, the position between the lens assembly and the fixing seat is adjustable in the axial direction of the fixing seat so as to perform prefocusing, the lens assembly after prefocusing and the fixing seat can be fixed by a fixing structure, and when the output gear is meshed with the large gear, the driving motor can drive the output gear to rotate so as to drive the adjusting ring to rotate through the large gear so as to adjust the focal length of the lens assembly.

As an alternative, the rotating end of the reduction gearbox is rotationally connected with the fixing seat, the connecting end of the reduction gearbox is provided with a pin shaft, the fixing seat is provided with a mounting hole, and the pin shaft can be elastically inserted into or separated from the mounting hole.

As an alternative, the link is provided with first hole and the second hole of intercommunication each other, first hole with have the step face between the second hole, the round pin axle include big tip, joint portion and connect in big tip with connecting portion between the joint portion, connecting portion slide set up in the second hole with in the first hole, big tip slide set up in the second hole and can outstanding the second hole, compression spring cover is located connecting portion and both ends butt respectively big tip with the step face, joint portion can be limited in the up end of link.

As an alternative, the fixing base is further provided with a boss, the pin shaft is inserted into the lower end face of the mounting hole, a groove is formed in the lower end face of the mounting hole, and the boss can be limited in the groove so that the reduction gearbox and the fixing base are positioned after being rotationally separated.

As an alternative, the lower end face of the connecting end is further provided with a slide way, and when the reduction gearbox rotates with the fixing seat, the boss is located in the slide way.

As an alternative, the clamping portion is provided with a notch, and the notch extends downward to the connecting portion.

As an alternative scheme, still be provided with the rotation hole on the fixing base, the rotation hole is provided with the opening, the rotation end be provided with rotation hole matched with pivot, the cross-section of pivot is rectangular shape, follows rectangular major axis direction the pivot can pass through the opening gets into the rotation hole, the rotation the reducing gear box, the pivot can the joint in the rotation hole.

As an alternative, the fixing base is provided with two mounting plates along the axial direction interval, two the mounting plates have all been seted up the rotation hole, the up end of rotating the end with lower terminal surface all protruding be equipped with the pivot, works as the reducing gear box with when fixing base swivelling joint, the rotating end inserts two between the mounting plates, be located the pivot rotation of rotating the end up end set up in one the mounting plate in the rotation hole, be located the pivot rotation of rotating the end lower terminal surface sets up in another the rotation hole of mounting plate.

As an alternative, the fixing base is provided with a containing cavity, an internal thread is arranged in the containing cavity, an external thread matched with the internal thread is arranged on the outer peripheral surface of the lens component, the lens component is in threaded connection with the fixing base, and relative displacement between the lens component and the fixing base can be adjusted by rotating the lens component so as to perform prefocusing.

As an alternative, the fixing structure is glue, and the glue can enable the lens component to be adhered and fixed with the fixing seat.

The invention has the beneficial effects that:

according to the automatic focusing lens module, the reduction gearbox is movably connected with the fixed seat, so that the output gear can be meshed with or separated from the large gear of the adjusting ring by moving the reduction gearbox. After the automatic focusing lens module is installed, the reduction gearbox is moved to separate the output gear from the large gear, so that the lens module can be subjected to pre-focusing; after the pre-focusing is completed, the reduction gearbox is moved to enable the output gear to be meshed with the large gear, and automatic focusing of the automatic focusing lens module under the action of the driving motor is achieved.

Drawings

FIG. 1 is an exploded view of an autofocus lens module (without the lens module) according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an assembling structure of an auto-focus lens module according to an embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of an autofocus lens module according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a reduction gearbox according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fixing base according to an embodiment of the present invention.

In the figure:

1. a fixing seat; 11. a mounting hole; 12. a boss; 13. a rotation hole; 131. an opening; 14. a mounting plate; 15. a receiving chamber; 16. a communication port; 17. an upper abutment plate;

2. a lens module; 21. an adjusting ring; 211. a large gear; 22. a lens assembly;

3. a driving member; 31. a driving motor; 32. a reduction gearbox; 321. an output gear; 322. a rotating end; 3221. a rotating shaft; 323. a connection end; 3231. a first hole; 3232. a second hole; 3233. a lower abutment plate; 324. a slideway;

4. a pin shaft; 41. a large end; 411. a groove; 42. a clamping part; 421. a notch; 43. a connection part;

5. compressing the spring.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar parts throughout, or parts having like or similar functions. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be interpreted broadly, as for example, they may be fixedly connected, or may be detachably connected, or may be electrically connected, or may be directly connected, or may be indirectly connected through an intermediary, or may be in communication with one another in two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present invention, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1-5, an embodiment of the present invention provides an auto-focusing lens module, which includes a fixing base 1, a lens module 2, and a driving member 3. The lens module 2 comprises an adjusting ring 21 and a lens assembly 22, the lens assembly 22 comprises a lens barrel, lens frames and groups, the lens frames and the groups are arranged in a one-to-one correspondence manner, a plurality of lens frames can be respectively arranged according to requirements, each group is arranged in one lens frame, the lens frames are arranged in the lens barrel, the adjusting ring 21 is rotatably arranged on the outer peripheral surface of the lens barrel, the relative distance between the lens frames can be adjusted by rotating the adjusting ring 21, and then the distance between the lens frames is driven to change so as to perform focal length adjustment operation; the position between the lens barrel and the fixed seat 1 along the axial direction of the fixed seat 1 is adjustable, when the lens barrel moves on the fixed seat 1 along the axial direction of the fixed seat 1, the whole lens module 2 can be driven to move, and then the automatic focusing lens module is subjected to pre-focusing, and the fixed structure can fix the lens barrel after the pre-focusing with the fixed seat 1 so as to prevent relative displacement between the lens barrel and the fixed seat 1 from influencing the precision when the adjusting ring 21 is rotated; the driving piece 3 comprises a driving motor 31 and a reduction gearbox 32, the reduction gearbox 32 is provided with an output gear 321, the peripheral surface of the adjusting ring 21 is provided with a large gear 211, the reduction gearbox 32 is movably connected with the fixed seat 1, the reduction gearbox 32 can drive the output gear 321 to move so that the output gear 321 can be meshed with or separated from the large gear 211, and when the output gear 321 is separated from the large gear 211, the position between the lens assembly 22 and the fixed seat 1 along the axial direction of the fixed seat 1 can be adjusted so as to realize the pre-focusing of the lens assembly 22; when the output gear 321 is meshed with the large gear 211, the driving motor 31 is arranged on the reduction gearbox 32 and can drive the output gear 321 to rotate, and then the large gear 211 drives the adjusting ring 21 to rotate so as to adjust the distance between a plurality of groups, thereby realizing the automatic adjustment of the focal length of the lens component 22.

This autofocus lens module is through setting up reducing gear box 32 and fixing base 1 into swing joint, can make autofocus lens module carry out the prefocusing after the assembly is accomplished, and the operation is more convenient, has reduced operating personnel's assembly and the degree of difficulty of focusing.

Optionally, the rotating end 322 of the reduction gearbox 32 is rotationally connected with the fixed seat 1, and the relative position between the reduction gearbox 32 and the fixed seat 1 can be changed by rotating the reduction gearbox 32, namely, the engagement or separation of the output gear 321 and the large gear 211 is realized; the connecting end 323 of the reduction gearbox 32 is provided with a pin shaft 4, the pin shaft 4 is elastically connected with the connecting end 323 of the reduction gearbox 32, the fixed seat 1 is provided with a mounting hole 11, and when the reduction gearbox 32 rotates to enable the output gear 321 and the large gear 211 to be meshed, the pin shaft 4 can be elastically inserted into the mounting hole 11; when it is required that the output gear 321 is separated from the large gear 211, the pin shaft 4 is pushed in the reverse direction so as to be out of the mounting hole 11. This structure makes it more convenient for the output gear 321 to mesh with or separate from the large gear 211. Preferably, the mounting hole 11 is a stepped hole, the stepped hole penetrates through the fixing seat 1, and when the pin 4 is elastically inserted into the stepped hole, the pin 4 abuts against a stepped surface of the stepped hole, so that the pin 4 is more stable after being inserted into the stepped hole.

In other embodiments, the reduction gearbox 32 may be further configured to move up or down relative to the fixed base 1, so as to drive the output gear 321 to engage with or disengage from the large gear 211.

Referring to fig. 1 and 3, the connection end 323 of the reduction gearbox 32 is provided with a first hole 3231 and a second hole 3232 which are communicated with each other, the first hole 3231 and the second hole 3232 are arranged along the axial direction of the fixing seat 1, the inner diameter of the first hole 3231 is smaller than that of the second hole 3232, a step surface is arranged between the first hole 3231 and the second hole 3232, the pin shaft 4 comprises a large end 41, a clamping portion 42 and a connection portion 43 connected between the large end 41 and the clamping portion 42, the connection portion 43 is slidably arranged in the first hole 3231 and the second hole 3232, the large end 41 is slidably arranged in the second hole 3232 and can protrude out of the second hole 3232, the clamping portion 42 limits the upper end surface of the connection end 323, and the compression spring 5 is sleeved on the connection portion 43 and two ends of the compression spring are respectively abutted against the large end 41 and the step surface. When the output gear 321 is required to be meshed with the large gear 211, the elastic force of the compression spring 5 is overcome to retract the large end 41 into the second hole 3232, the reduction gearbox 32 is rotated to align the second hole 3232 with the mounting hole 11 of the fixed seat 1, and the large end 41 protrudes out of the second hole 3232 and is inserted into the mounting hole 11 under the elastic force of the compression spring 5, so that the operation is simple and convenient.

The pin 4 is made of metal, in order to make the pin 4 more convenient to install at the connection end 323 of the reduction gearbox 32, the notch 421 is formed in the clamping portion 42, the notch 421 extends downwards to the connection portion 43, the size of the clamping portion 42 is larger than the inner diameter of the first hole 3231 in a natural state, when the pin 4 is installed, the clamping portion 42 is extruded to enable the size of the clamping portion 42 to be smaller than the inner diameter of the first hole 3231, and after the clamping portion 42 passes through the first hole 3231, the clamping portion 42 is restored to the original state again, so that the clamping portion 42 is limited at the connection end 323. Of course, the pin 4 may be processed by other elastic materials without designing the notch 421, and the pin 4 itself made of elastic materials may be elastically deformed.

In this embodiment, referring to fig. 1-2, the fixing base 1 is further provided with an upper abutment plate 17, the connection end 323 of the reduction gearbox 32 is provided with a lower abutment plate 3233, when the output gear 321 is meshed with the bull gear 211, the lower end surface of the connection end 323 abuts against the fixing base 1, and the lower abutment plate 3233 abuts against the upper abutment plate 17 to limit the movement of the reduction gearbox 32 along the axial direction of the fixing base 1.

In order to separate the output gear 321 from the large gear 211, the reduction gearbox 32 can be positioned, the fixing base 1 is further provided with a boss 12, the lower end face of the large end portion 41 of the pin shaft 4 is provided with a groove 411, when the reduction gearbox 32 is rotationally separated from the fixing base 1, the boss 12 can be limited in the groove 411, and the pin shaft 4 is elastically clamped with the boss 12 under the elastic acting force of the compression spring 5, so that the reduction gearbox 32 is fixed.

Further, in order to flexibly rotate the reduction gearbox 32, as shown in fig. 4, a slide way 324 is disposed on the lower end surface of the connecting end 323 of the reduction gearbox 32 along the radial direction thereof, the slide way 324 is communicated with the second hole 3232, and when the reduction gearbox 32 rotates with the fixing base 1, the boss 12 is located in the slide way 324 to prevent the connecting end 323 from interfering with the boss 12, so that the reduction gearbox 32 rotates more flexibly and conveniently.

With continued reference to fig. 1 and 5, still be provided with rotation hole 13 on the fixing base 1, rotation hole 13 is provided with opening 131, rotation end 322 of reducing gear box 32 is provided with rotation hole 13 matched with pivot 3221, the cross-section of pivot 3221 is rectangular shape, in long axis direction pivot 3221 along rectangular shape can get into rotation hole 13 through opening 131, rotation reducing gear box 32 drives pivot 3221 and rotates, pivot 3221 can the joint in rotation hole 13, this structure makes reducing gear box 32 and fixing base 1 installation more convenient, can accomplish the installation without the use of the instrument. In this embodiment, the rotating shaft 3221 is a rotating shaft 3221 matched with the rotating hole 13, two planes parallel to each other are formed on the rotating shaft 3221 along the axial direction of the rotating shaft 3221, so that the section of the rotating shaft 3221 is in a long strip shape, the distance between the two planes is smaller than or equal to the size of the opening 131, the rotating shaft 3221 enters the rotating hole 13 through the opening 131 and rotates for a set angle, and the rotating shaft 3221 is limited in the rotating hole 13 to realize connection.

In order to further limit the reduction gearbox 32 and prevent the reduction gearbox 32 from moving along the axial direction of the fixed seat 1, the fixed seat 1 is provided with two mounting plates 14 along the axial direction at intervals, the two mounting plates 14 are provided with rotating holes 13, the upper end face and the lower end face of the rotating end 322 of the reduction gearbox 32 are both convexly provided with rotating shafts 3221, when the reduction gearbox 32 is rotationally connected with the fixed seat 1, the rotating end 322 is inserted between the two mounting plates 14, the rotating shafts 3221 positioned on the upper end face of the rotating end 322 are rotationally arranged in the rotating holes 13 of one mounting plate 14, and the rotating shafts 3221 positioned on the lower end face of the rotating end 322 are rotationally arranged in the rotating holes 13 of the other mounting plate 14. This structure further restricts the reduction gearbox 32 in the axial direction, and the structure is more stable.

Referring to fig. 1-2 and 5, the fixing base 1 has a receiving cavity 15, an internal thread is provided in the receiving cavity 15, an external thread matching with the internal thread is provided on an outer circumferential surface of a lens barrel of the lens assembly 22, the lens barrel is in threaded connection with the fixing base 1, and a relative position between the lens assembly 22 and the fixing base 1 can be adjusted by rotating the lens barrel to perform pre-focusing. The structure is connected with the fixing seat 1 through the thread of the lens cone, so that the pre-focusing is more convenient.

Optionally, the fixing structure is glue, and the glue can enable the lens barrel after pre-focusing to be adhered and fixed with the fixing base 1, so that the operation is simple. Referring to fig. 5, a communication port 16 communicating with the accommodating cavity 15 is provided on the fixing base 1, and glue can enter the accommodating cavity 15 through the communication port 16, so that the glue pouring is more convenient.

In other embodiments, a jackscrew may be used for fixing, a jackscrew hole communicating with the accommodating cavity 15 is formed in the fixing base 1, and after the pre-focusing is completed, the jackscrew is screwed into the jackscrew hole and screwed, so that the lens barrel is fixed with the fixing base 1.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. Automatic focusing lens module, its characterized in that includes:

a fixed seat (1);

the lens module (2) comprises an adjusting ring (21) and a lens assembly (22), wherein the adjusting ring (21) is rotatably arranged on the periphery of the lens assembly (22), and the lens assembly (22) is arranged on the fixing seat (1);

the driving piece (3), including driving motor (31) and reducing gear box (32), the outer peripheral face of adjusting collar (21) is provided with gear wheel (211), reducing gear box (32) are provided with output gear (321), reducing gear box (32) with fixing base (1) swing joint removes gear wheel (32) can drive output gear (321) with gear wheel (211) meshing or separation, when output gear (321) with gear wheel (211) separation, lens subassembly (22) with position between fixing base (1) are followed the axis direction of fixing base (1) is adjustable in order to carry out the prefocusing, and fixed knot constructs can be with lens subassembly (22) after the prefocusing with fixing base (1) are fixed, works as when output gear (321) with gear wheel (211) meshing, driving motor (31) can drive output gear (321) rotate and then drive through gear wheel (211) the adjusting collar (21) rotates in order to adjust the focus of lens subassembly (22).

2. The automatic focusing lens module according to claim 1, wherein a rotating end (322) of the reduction gearbox (32) is rotatably connected with the fixed base (1), a connecting end (323) of the reduction gearbox (32) is provided with a pin shaft (4), the fixed base (1) is provided with a mounting hole (11), and the pin shaft (4) can be elastically inserted into or separated from the mounting hole (11).

3. The autofocus lens module according to claim 2, wherein the connection end (323) is provided with a first hole (3231) and a second hole (3232) that are in communication with each other, a stepped surface is provided between the first hole (3231) and the second hole (3232), the pin shaft (4) includes a large end portion (41), a clamping portion (42), and a connection portion (43) connected between the large end portion (41) and the clamping portion (42), the connection portion (43) is slidably provided in the second hole (3232) and the first hole (3231), the large end portion (41) is slidably provided in the second hole (3232) and can protrude out of the second hole (3232), the compression spring (5) is sleeved on the connection portion (43) and both ends thereof respectively abut against the large end portion (41) and the stepped surface, and the clamping portion (42) can be limited to an upper end surface of the connection end (323).

4. The automatic focusing lens module according to claim 2, wherein the fixing base (1) is further provided with a boss (12), the lower end face of the pin shaft (4) inserted into the mounting hole (11) is provided with a groove (411), and the boss (12) can be limited in the groove (411) so as to enable the reduction gearbox (32) to be positioned after being rotationally separated from the fixing base (1).

5. The automatic focusing lens module according to claim 4, wherein a slide way (324) is further provided on a lower end surface of the connecting end (323), and the boss (12) is located in the slide way (324) when the reduction gearbox (32) rotates with the fixing base (1).

6. An autofocus lens module according to claim 3, wherein the clamping portion (42) is provided with a notch (421), and the notch (421) extends down to the connecting portion (43).

7. The automatic focusing lens module according to claim 2, wherein the fixing base (1) is further provided with a rotation hole (13), the rotation hole (13) is provided with an opening (131), the rotation end (322) is provided with a rotation shaft (3221) matched with the rotation hole (13), the section of the rotation shaft (3221) is in a long strip shape, the rotation shaft (3221) can enter the rotation hole (13) through the opening (131) along the long axis direction of the long strip shape, the reduction gearbox (32) is rotated, and the rotation shaft (3221) can be clamped in the rotation hole (13).

8. The automatic focusing lens module according to claim 7, wherein the fixing base (1) is provided with two mounting plates (14) at intervals along an axial direction thereof, the two mounting plates (14) are provided with the rotation holes (13), the upper end face and the lower end face of the rotation end (322) are provided with the rotation shaft (3221) in a protruding manner, when the reduction gearbox (32) is rotationally connected with the fixing base (1), the rotation end (322) is inserted between the two mounting plates (14), the rotation shaft (3221) located at the upper end face of the rotation end (322) is rotationally arranged in the rotation hole (13) of one mounting plate (14), and the rotation shaft (3221) located at the lower end face of the rotation end (322) is rotationally arranged in the rotation hole (13) of the other mounting plate (14).

9. The automatic focusing lens module according to claim 1, wherein the fixing base (1) is provided with a containing cavity (15), an internal thread is arranged in the containing cavity (15), an external thread matched with the internal thread is arranged on the outer circumferential surface of the lens component (22), the lens component (22) is in threaded connection with the fixing base (1), and relative displacement between the lens component (22) and the fixing base (1) can be adjusted by rotating the lens component (22) so as to perform prefocusing.

10. An autofocus lens module according to claim 9, wherein the fixing structure is glue, which enables the lens assembly (22) to be adhesively fixed to the holder (1).