CN217739585U

CN217739585U - Multi-head thread focusing structure of lens

Info

Publication number: CN217739585U
Application number: CN202222061805.XU
Authority: CN
Inventors: 王振鹏; 胡洋
Original assignee: Guangzhou Xiaoying Imaging Technology Co ltd
Current assignee: Guangzhou Xiaoying Imaging Technology Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-11-04
Anticipated expiration: 2032-08-04

Abstract

The utility model relates to a camera lens bull screw thread structure of focusing, including the track sleeve, wear to locate the guide housing of track sleeve, wear to locate the preceding lens cone of the one end of guide housing and wear to locate the back lens cone of the other end of guide housing, preceding lens cone and back lens cone threaded connection, guide housing and back lens cone fixed connection, the guide way has been seted up to the lateral wall of track sleeve, the guide way is seted up along the telescopic axis direction of guide rail, wear to be equipped with guide bolt in the guide way, the guide housing is provided with the direction screw with guide bolt looks adaptation, guide bolt passes the guide way to with direction screw threaded connection, back lens cone threaded connection has the focusing ring, be provided with solid fixed ring on the track sleeve, gu fixed ring and track sleeve fixed connection, and gu fixed ring and focusing ring threaded connection. Through the cooperation of track sleeve, uide bushing, focusing ring, preceding lens cone and back lens cone, replaced the tradition and need focus through the helicla flute, reduced the processing degree of difficulty, reduced the processing cost.

Description

Multi-head thread focusing structure of lens

Technical Field

The application relates to the field of optical lenses, in particular to a multi-thread focusing structure of a lens.

Background

Focusing refers to the process of obtaining a sharp image by changing the distance from the optical center of the lens to the plane of the film. Industrial lenses have become more and more widely used, the basic function of which is to implement beam transformation (modulation), and in machine vision systems, the main function of the lens is to image an object on the photosensitive surface of an image sensor.

In the related art, in the industrial lens focusing, a focusing ring on a lens is rotated, so that the focusing ring rotates along a spiral groove, and the lens is driven to realize translational motion to realize a focusing function.

However, the spiral groove needs to be machined by five-axis numerical control CNC, the parameters are complex, the matching requirement is high, the machining precision requirement on the CNC numerical control machine is extremely high, the machining is difficult, and the machining cost is high, so that the focusing structure with low machining cost is urgently needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects that the precision requirement of a traditional industrial lens barrel focusing spiral groove is extremely high in the production process, the processing difficulty is high, and the processing cost is high, the application provides a lens multi-start thread focusing structure.

The application provides a camera lens bull screw thread structure of focusing adopts following technical scheme:

the utility model provides a camera lens bull screw thread structure of focusing, includes the track sleeve, wears to locate the guide housing of track sleeve, wear to locate the preceding lens cone of the one end of guide housing and wear to locate the back lens cone of the other end of guide housing, preceding lens cone with back lens cone threaded connection, the guide housing with back lens cone fixed connection, the guide way has been seted up to the lateral wall of track sleeve, the guide way is followed the telescopic axis direction of guide rail is seted up, wear to be equipped with guide bolt in the guide way, the guide housing be provided with the direction screw of guide bolt looks adaptation, guide bolt passes the guide way to with direction screw threaded connection, back lens cone threaded connection has the focusing ring, be provided with solid fixed ring on the track sleeve, gu fixed ring with track sleeve fixed connection, just gu fixed ring with focusing ring threaded connection.

Through adopting above-mentioned technical scheme, during the focusing, rotate the focusing ring for the focusing ring rotates, at this moment, add and exert an effort to the track sleeve, make the track switch on can not rotate along with the focusing ring. The focusing ring rotates, so that the rear lens cone is stressed, and is limited by the guide groove, the rear lens cone moves along the length direction of the guide groove, and the rear lens cone can drive the front lens cone to move along the axis direction of the guide sleeve, so that focusing is realized. Through the angle of rotatory focusing ring for preceding lens cone moves along the length direction of guide way with the back lens cone jointly, thereby realizes focusing, and the cooperation of track sleeve, uide bushing, focusing ring, preceding lens cone and back lens cone has replaced the tradition and has need focus through the helicla flute, has reduced the processing degree of difficulty, has reduced the processing cost.

Optionally, the fixing ring is provided with a fixing screw hole, a fixing bolt penetrates through the fixing screw hole, and one end of the fixing bolt penetrates through the fixing screw hole and abuts against the focusing ring.

By adopting the technical scheme, when focusing, the fixing bolt is unscrewed, and the focusing ring is rotated for focusing; after focusing, the fixing bolt is screwed to enable the fixing bolt to abut against the focusing ring tightly, so that the focusing ring is not prone to shifting in the photographing process.

Optionally, the inner side of the rear lens barrel is provided with a first internal thread, the outer side of the front lens barrel is provided with a first external thread matched with the first internal thread, the outer wall of the rear lens barrel is provided with a second external thread, and the inner wall of the focusing ring is provided with a second internal thread matched with the second external thread.

By adopting the technical scheme, when the lens is assembled, the inner side of the rear lens cone is in threaded connection with the outer side of the front lens, and the outer wall of the rear lens cone is in threaded connection with the inner wall of the focusing ring.

Optionally, the inner wall of the fixing ring is provided with a focusing internal thread, and the outer wall of the focusing ring is provided with a focusing external thread matched with the focusing internal thread.

Through adopting above-mentioned technical scheme, when the solid fixed ring of assembly and focusing ring, with the inner wall threaded connection of solid fixed ring and the inner wall of focusing ring, because solid fixed ring and track sleeve fixed connection to make solid fixed ring and focusing ring fixed connection.

Optionally, one end of the guide sleeve is sleeved outside the rear lens barrel, the rear lens barrel extends into one end of the guide sleeve and is provided with a diaphragm, a yielding groove is formed in the side wall of the guide sleeve, the diaphragm is provided with an L-shaped shifting piece used for rotating to adjust the size of the diaphragm, and one end of the L-shaped shifting piece extends out of the rear lens barrel from the yielding groove.

Through adopting above-mentioned technical scheme, stir L type plectrum in order to adjust the light ring size of diaphragm.

Optionally, an arc-shaped groove is formed in the side wall of the track sleeve, the arc-shaped groove is formed in the edge of the circumferential direction of the track sleeve, a diaphragm sleeve is arranged on the outer side of the track sleeve, the diaphragm sleeve is arranged on the track sleeve in a sleeved mode, an adjusting bolt penetrates through the side wall of the diaphragm sleeve and is connected with the arc-shaped groove in a sliding mode, an adjusting groove is formed in the side wall of the L-shaped shifting piece, the adjusting groove is formed in the edge of the axis direction of the track sleeve, and the adjusting bolt penetrates through one end of the arc-shaped groove and is connected with the adjusting groove in a sliding mode.

Through adopting above-mentioned technical scheme, when adjusting the diaphragm, rotate the diaphragm cover, the diaphragm cover drives adjusting bolt and rotates along the radian direction of arc wall to drive the diaphragm and rotate, and then change the light ring of diaphragm, at this moment, because diaphragm adjusting bolt is under the spacing of arc wall, diaphragm adjusting bolt removes along the length direction of adjusting the groove.

Optionally, the diaphragm sleeve is provided with a tightening screw hole, a tightening bolt penetrates through the tightening screw hole, and one end of the tightening bolt penetrates through the tightening screw hole and abuts against one side of the track sleeve.

Through adopting above-mentioned technical scheme, after diaphragm adjusting bolt has adjusted the diaphragm, screw up and support the bolt to make and support the bolt and support the telescopic lateral wall of track, and then make the difficult emergence skew of diaphragm at photographic in-process.

Optionally, the track sleeve wears to be equipped with and embraces the ring, it is equipped with the interface ring to embrace the ring cover, just the interface ring with embrace ring fixed connection, the outer wall of interface ring is provided with C interface screw thread.

By adopting the technical scheme, the interface ring can be matched with lens barrels with different specifications, so that the applicability of the lens is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the front lens barrel and the rear lens barrel move together along the length direction of the guide groove by rotating the angle of the focusing ring, so that focusing is realized, and the matching of the track sleeve, the guide sleeve, the focusing ring, the front lens barrel and the rear lens barrel replaces the traditional mode that focusing is carried out through a spiral groove, so that the processing difficulty is reduced, and the processing cost is reduced;

2. the fixed ring is in threaded connection with the focusing ring, the focusing ring is in threaded connection with the rear lens barrel, and the front lens barrel is in threaded connection with the rear lens barrel, so that the lens is convenient to assemble and replace, power is convenient to transmit, and the production process is simplified.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a schematic illustration of an explosive structure of an embodiment of the present application;

FIG. 3 is a schematic assembly diagram of the track sleeve, the front barrel and the diaphragm sleeve in the embodiment of the present application;

FIG. 4 is a schematic view of the arrangement of the diaphragm sleeve and the track sleeve in the embodiment of the present application;

fig. 5 is an exploded view of the adjusting bolt, the tightening bolt and the fixing bolt in the embodiment of the present application.

In the figure, 1, a rail sleeve; 2. a guide sleeve; 3. a front barrel; 4. a rear barrel; 5. a guide groove; 6. a guide bolt; 7. a guide screw hole; 8. a diaphragm; 10. a connecting bolt; 11. a yielding groove; 12. an L-shaped shifting sheet; 13. an arc-shaped slot; 14. a diaphragm sleeve; 15. adjusting the bolt; 16. an adjustment groove; 17. tightly abutting against the screw hole; 18. tightly abutting against the bolt; 19. a focusing ring; 20. a fixing ring; 21. fixing screw holes; 22. fixing the bolt; 23. a clasping ring; 24. an interface ring.

Detailed Description

The present application is described in further detail below with reference to fig. 1-5.

A multi-thread focusing structure of a lens is shown in fig. 1 and fig. 2, and comprises a track sleeve 1, a guide sleeve 2 penetrating the track sleeve 1, a front lens barrel 3 penetrating one end of the guide sleeve 2, and a rear lens barrel 4 penetrating the other end of the guide sleeve 2. A front lens group is arranged in the front lens cone 3. The rear lens barrel 4 is arranged in a hollow mode, a rear lens group is arranged in the rear lens barrel 4, and the rear lens group and the front lens group are located on the same axis.

As shown in fig. 2 and 3, the guide sleeve 2 is fixedly connected with the rear barrel 4, and the guide sleeve 2 is slidably connected with the rail sleeve 1. Specifically, the side wall of the track sleeve 1 is provided with a guide groove 5, and the guide groove 5 is formed along the axial direction of the guide rail sleeve. A guide bolt 6 penetrates through the guide groove 5, the guide sleeve 2 is provided with a guide screw hole 7 matched with the guide bolt 6, the guide bolt 6 penetrates through the guide groove 5 to be in threaded connection with the guide screw hole 7, a nut of the guide bolt 6 is positioned outside the guide screw hole 7, and the nut of the guide bolt 6 is in sliding connection with the guide groove 5, so that the guide sleeve 2 is fixedly connected with the track sleeve 1 in the circumferential direction, and the guide sleeve 2 is in sliding connection with the track sleeve 1 in the axial direction; and, by adjusting the position of the guide bolt 6 in the guide slot 5, the guide sleeve 2 can be translated in the length direction of the guide slot 5, so that the rear barrel 4 can be translated in the length direction of the guide slot 5.

As shown in fig. 2 and 3, one end of the guide sleeve 2 is sleeved outside the rear lens barrel 4, one end of the rear lens barrel 4 extending into the guide sleeve 2 is provided with a diaphragm 8, a connecting screw hole is formed in the side wall of the guide sleeve 2, a connecting bolt 10 penetrates through the connecting screw hole, and a diaphragm screw hole matched with the connecting bolt 10 is formed in the diaphragm 8, so that the diaphragm 8 is fixedly connected with the guide sleeve 2.

As shown in fig. 2 and 3, a yielding groove 11 is formed in the side wall of the guide sleeve 2, the diaphragm 8 is provided with an L-shaped shifting piece 12 for rotating to adjust the aperture size of the diaphragm 8, and one end of the L-shaped shifting piece 12 extends out of the rear lens barrel 4 from the yielding groove 11. The guide sleeve 2 and the rear lens cone 4 are sleeved with the track sleeve 1, an arc-shaped groove 13 is formed in the side wall of the track sleeve 1, and the arc-shaped groove 13 is formed in the circumferential direction of the track sleeve 1.

As shown in fig. 3 and 4, a diaphragm sleeve 14 is disposed outside the track sleeve 1, and the diaphragm sleeve 14 is sleeved on the track sleeve 1, and the diaphragm sleeve 14 can rotate relative to the track sleeve 1. An adjusting bolt 15 penetrates through the side wall of the diaphragm sleeve 14, and the adjusting bolt 15 penetrates through the arc-shaped groove 13 and is connected with the arc-shaped groove 13 in a sliding mode. In this embodiment, the adjusting bolt 15 passes through the arc-shaped slot 13 and then is slidably connected with the L-shaped shifting piece 12. Specifically, an adjusting groove 16 is formed in the side wall of the L-shaped shifting piece 12, the adjusting groove 16 is formed along the axial direction of the track sleeve 1, and the adjusting bolt 15 penetrates through one end of the arc-shaped groove 13 and is connected to the adjusting groove 16 in a sliding manner. When the diaphragm sleeve 14 is rotated, the diaphragm sleeve 14 drives the adjusting bolt 15 to rotate along the radian direction of the arc-shaped groove 13, so as to drive the diaphragm 8 to rotate, thereby changing the aperture of the diaphragm 8.

As shown in fig. 3 and 4, the diaphragm sleeve 14 is further provided with a fastening screw hole 17, a fastening bolt 18 is inserted into the fastening screw hole 17, and one end of the fastening bolt 18 passes through the fastening screw hole 17 and abuts against one side of the track sleeve 1. After the diaphragm 8 is adjusted by the diaphragm 8 adjusting bolt 15, the abutting bolt 18 is screwed down, so that the abutting bolt 18 abuts against the side wall of the track sleeve 1, and the diaphragm 8 is not easy to deviate in the photographing process.

As shown in fig. 3 and 5, the inner side of the rear barrel 4 is provided with a first internal thread, and the outer side of the front barrel 3 is provided with a first external thread adapted to the first internal thread, so that the rear barrel 4 is in threaded connection with the front barrel 3. The outer wall of the rear lens barrel 4 is provided with a second external thread, and the second external thread is connected with a focusing ring 19. Specifically, the inner wall of the focusing ring 19 is provided with a second internal thread adapted to the second external thread, so that the focusing ring 19 is screwed with the rear barrel 4. In the present embodiment, one end of the focus ring 19 having the second internal thread is referred to as a connection portion, and the other end of the focus ring 19 is referred to as a focus portion.

As shown in fig. 4 and 5, a fixing ring 20 is disposed on the track sleeve 1, and the fixing ring 20 is fixedly connected with the track sleeve 1. The inner wall of the fixing ring 20 is provided with a focusing internal thread, and the outer wall of the connecting part of the focusing ring 19 is provided with a focusing external thread matched with the focusing internal thread, so that the fixing ring 20 is in threaded connection with the focusing ring 19, and further the track sleeve 1 is fixedly connected with the focusing ring 19. The fixing ring 20 is provided with a fixing screw hole 21, a fixing bolt 22 is inserted into the fixing screw hole 21, and one end of the fixing bolt 22 passes through one end of the fixing screw hole 21 and abuts against the focusing ring 19.

As shown in fig. 4 and 5, during focusing, the fixing bolt 22 is loosened, and the focusing part of the focusing ring 19 is rotated, so that the focusing ring 19 rotates, the rear barrel 4 moves along the length direction of the guide groove 5 due to the sliding connection of the focusing ring 19 and the rear barrel 4 and the limitation of the guide groove 5 of the rail sleeve 1 on the rear barrel 4, and the rear lens can push the front barrel 3 to move along the axial direction of the guide groove 5 due to the threaded connection of the rear barrel 4 and the front barrel 3, so as to realize focusing. After focusing, the fixing bolt 22 is screwed, so that the fixing bolt 22 abuts against the focusing ring 19 tightly, and the focusing ring 19 is not easy to deviate in the shooting process.

As shown in fig. 4 and fig. 5, the side wall of the track sleeve 1 is provided with a clasping slot, the clasping slot is formed along the circumferential direction of the track sleeve 1, and a clasping ring 23 is clamped and matched at the clasping slot, so that the clasping ring 23 is fixedly connected with the track sleeve 1. Hold and have seted up on the ring 23 and hold screw tightly, in this embodiment, the quantity of holding the screw tightly is three, and three screw of holding tightly is evenly seted up along the circumferential direction of holding ring 23, and three screw department of holding tightly wears to be equipped with and holds the bolt tightly to make hold ring 23 and track sleeve 1 fixed connection.

As shown in fig. 4 and 5, an interface ring 24 for limiting the rear lens group is provided at an end of the rear barrel 4 away from the diaphragm 8 (see fig. 2). The interface ring 24 is inserted into the clasping ring 23, and the interface ring 24 is fixedly connected with the clasping ring 23. The outer wall of the interface ring 24 is provided with C-interface threads, so that the interface ring 24 can be matched with lenses of different specifications.

The implementation principle of the embodiment of the application is as follows: initially, the fixing ring 20 and the focusing ring 19, the focusing ring 19 and the rear barrel 4, and the front barrel 3 and the rear barrel 4 are screwed, and at this time, the rear barrel 4 is inserted into the track sleeve 1. After the rear lens cone 4 is inserted into the track sleeve 1, the guide bolt 6 sequentially penetrates through the guide groove 5 of the track sleeve 1 and is in threaded connection with the guide screw hole 7, so that the guide sleeve 2 and the track sleeve 1 are fixedly connected in the circumferential direction, the guide sleeve 2 and the track sleeve 1 are in sliding connection in the axial direction, and then the fixing bolt 22 penetrates through the fixing screw hole 21 and abuts against the focusing ring 19 tightly.

During focusing, the fixing bolt 22 is loosened, and the focusing part of the focusing ring 19 is rotated, so that the focusing ring 19 rotates, and at the moment, the track sleeve 1 cannot rotate along with the focusing ring 19 under the external acting force. Because the focusing ring 19 is connected with the rear lens barrel 4 in a sliding manner, and because the rear lens barrel 4 is limited by the guide groove 5 of the track sleeve 1, the rear lens barrel 4 moves along the length direction of the guide groove 5, and because the rear lens barrel 4 is connected with the front lens barrel 3 in a threaded manner, the rear lens can push the front lens barrel 3 to move along the axial direction of the guide groove 5, so that focusing is realized. At this time, since the diaphragm 8 adjusting bolt 15 is limited by the arc-shaped groove 13, the diaphragm 8 adjusting bolt 15 moves along the length direction of the adjusting groove 16. After focusing, the fixing bolt 22 is screwed, so that the fixing bolt 22 abuts against the focusing ring 19 tightly, and the focusing ring 19 is not easy to deviate in the shooting process.

When adjusting the diaphragm 8, rotate the diaphragm cover 14, the diaphragm cover 14 drives adjusting bolt 15 and rotates along the radian direction of arc wall 13 to drive diaphragm 8 to rotate, and then change the light ring of diaphragm 8. After the diaphragm 8 is adjusted by the diaphragm 8 adjusting bolt 15, the abutting bolt 18 is screwed down, so that the abutting bolt 18 abuts against the side wall of the track sleeve 1, and the diaphragm 8 is not easy to deviate in the photographing process.

The embodiments of the present disclosure are all preferred embodiments of the present disclosure, and the protection scope of the present disclosure is not limited thereby, wherein like parts are designated by like reference numerals. Therefore: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a camera lens bull screw thread structure of focusing, includes track sleeve (1), wears to locate uide bushing (2) of track sleeve (1), wears to locate preceding lens cone (3) of the one end of uide bushing (2) and wears to locate back lens cone (4) of the other end of uide bushing (2), preceding lens cone (3) with back lens cone (4) threaded connection, uide bushing (2) with back lens cone (4) fixed connection, guide way (5) have been seted up to the lateral wall of track sleeve (1), guide way (5) are followed track sleeve's axis direction is seted up, wear to be equipped with guide bolt (6) in guide way (5), uide bushing (2) be provided with guide screw (7) of guide bolt (6) looks adaptation, guide bolt (6) pass guide way (5) to with guide screw (7) threaded connection, back lens cone (4) threaded connection has focusing ring (19), be provided with solid fixed ring (20) on track sleeve (1), gu guide bolt (20) with track sleeve (1) and track sleeve (1) threaded connection just focusing ring (19) and solid fixed ring (20).

2. The lens multi-start thread focusing structure according to claim 1, wherein the fixing ring (20) is provided with a fixing screw hole (21), a fixing bolt (22) is inserted into the fixing screw hole (21), and one end of the fixing bolt (22) passes through the fixing screw hole (21) and abuts against the focusing ring (19).

3. The lens multi-start thread focusing structure according to claim 1, wherein the inner side of the rear barrel (4) is provided with a first internal thread, the outer side of the front barrel (3) is provided with a first external thread adapted to the first internal thread, the outer wall of the rear barrel (4) is provided with a second external thread, and the inner wall of the focusing ring (19) is provided with a second internal thread adapted to the second external thread.

4. The lens multi-start thread focusing structure according to claim 1, wherein the inner wall of the fixing ring (20) is provided with a focusing inner thread, and the outer wall of the focusing ring (19) is provided with a focusing outer thread matched with the focusing inner thread.

5. The lens multi-start thread focusing structure according to claim 1, wherein one end of the guide sleeve (2) is sleeved outside the rear lens barrel (4), one end of the rear lens barrel (4) extending into the guide sleeve (2) is provided with a diaphragm (8), a yielding groove (11) is formed in the side wall of the guide sleeve (2), the diaphragm (8) is provided with an L-shaped shifting piece (12) used for rotating to adjust the size of the aperture of the diaphragm (8), and one end of the L-shaped shifting piece (12) extends out of the rear lens barrel (4) from the yielding groove (11).

6. The lens multi-start thread focusing structure according to claim 5, wherein an arc-shaped groove (13) is formed in a side wall of the track sleeve (1), the arc-shaped groove (13) is formed in the circumferential direction of the track sleeve (1), a diaphragm sleeve (14) is arranged on the outer side of the track sleeve (1), the diaphragm sleeve (14) is sleeved on the track sleeve (1), an adjusting bolt (15) penetrates through a side wall of the diaphragm sleeve (14), the adjusting bolt (15) penetrates through the arc-shaped groove (13) and is connected with the arc-shaped groove (13) in a sliding manner, an adjusting groove (16) is formed in a side wall of the L-shaped shifting piece (12), the adjusting groove (16) is formed in the axial direction of the track sleeve (1), and one end of the adjusting bolt (15) penetrating through the arc-shaped groove (13) is connected to the adjusting groove (16) in a sliding manner.

7. The lens multi-start thread focusing structure according to claim 6, wherein the diaphragm sleeve (14) is provided with a tightening screw hole (17), a tightening bolt (18) is inserted into the tightening screw hole (17), and one end of the tightening bolt (18) passes through the tightening screw hole (17) and abuts against one side of the track sleeve (1).

8. The lens multi-start thread focusing structure according to claim 1, wherein a clasping ring (23) is arranged in the track sleeve (1) in a penetrating manner, the clasping ring (23) is sleeved with an interface ring (24), the interface ring (24) is fixedly connected with the clasping ring (23), and a C-interface thread is arranged on the outer wall of the interface ring (24).