CN212276069U

CN212276069U - Adjusting mechanism of fixed-focus lens

Info

Publication number: CN212276069U
Application number: CN202020969460.6U
Authority: CN
Inventors: 胡伟
Original assignee: Guangdong OPT Machine Vision Co Ltd
Current assignee: Guangdong OPT Machine Vision Co Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-01-01
Anticipated expiration: 2030-06-01

Abstract

The utility model belongs to the technical field of optical lens, concretely relates to guiding mechanism of tight shot, including optical device and mechanical device, optical device includes the fixed group that sets gradually by the object space to the image space and transfers wide group, mechanical device include the front mirror seat and install in rear mirror seat in the front mirror seat, fixed group install in the front mirror seat, transfer wide group install in the rear mirror seat, the direction nail is installed to the lateral part of rear mirror seat, the lateral part cover of front mirror seat is equipped with the focusing ring, the focusing ring be provided with the curve groove that the direction nail matches, the curve groove passes through the direction nail drives transfer wide group seesaw. The utility model discloses can the motion of the partial mirror group of individual drive, help improving the flexibility of camera lens to improve user experience.

Description

Adjusting mechanism of fixed-focus lens

Technical Field

The utility model belongs to the technical field of optical lens, concretely relates to guiding mechanism of tight shot.

Background

With the development of the strategy of manufacturing 2025 in China, the industrial automation is rapidly developed, and machine vision is widely applied to the fields of production and manufacturing, quality detection, logistics, medicine, scientific research and the like, and is used for measuring, judging, detecting defects and the like of a target part to reduce or eliminate misjudgment during manual operation and improve the measurement precision and stability. The lens occupies an important position as the 'eye' of machine vision, and the requirement on the fixed-focus lens is higher and higher in application scenes of electronic product manufacturing such as liquid crystal display defect detection, mobile phone touch screen circuits and the like.

However, the inventor finds that the existing scheme has at least the following defects: the prior lens can only adjust the focal length of all lens groups simultaneously, and cannot adjust partial lens groups, thereby reducing the flexibility of the lens.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: aiming at the defects of the prior art, the adjusting mechanism of the fixed-focus lens is provided, a part of the lens group can be driven to move independently, the flexibility of the lens is improved, and therefore the user experience is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an guiding mechanism of tight shot, includes optical device and mechanical device, optical device includes the fixed group that sets gradually by the object space to the image space and transfers wide group, mechanical device include the front mirror seat and install in rear mirror seat in the front mirror seat, fixed group install in the front mirror seat, transfer wide group install in the rear mirror seat, the direction nail is installed to the lateral part of rear mirror seat, the lateral part cover of front mirror seat is equipped with the focusing ring, the focusing ring be provided with the curve groove that the direction nail matches, the curve groove passes through the direction nail drives transfer wide group seesaw.

As an improvement of the guiding mechanism of the fixed-focus lens, the front lens base is provided with a guide hole, and the guide hole is followed the moving direction of the guide nail is extended.

As an improvement of the adjusting mechanism of the fixed-focus lens, the curve groove is centered on the side wall of the focusing ring.

As an improvement of the adjusting mechanism of the fixed-focus lens, the end of the front lens base is provided with a cavity, the rear lens base is accommodated in the cavity, and the length of the front lens base is greater than that of the rear lens base.

As an improvement of the adjusting mechanism of the fixed-focus lens, the fixed group and the width-adjusting group are sequentially provided with an iris diaphragm and an iris diaphragm.

As an improvement of an adjusting mechanism of a fixed focus lens, fixed group includes preceding clamping ring, first lens, first space ring, second lens, third lens, first cemented lens, second space ring and the sixth lens that sets gradually along the optical axis.

As an improvement of the adjusting mechanism of the fixed-focus lens, the width adjusting group comprises a seventh lens, a third space ring, a second cemented lens, a fourth space ring, a third cemented lens, a fifth space ring, an eighth lens and a rear pressing ring which are sequentially arranged along the optical axis.

As an improvement of an guiding mechanism of a fixed focus camera lens, the guiding mechanism of fixed focus camera lens still includes solid fixed cylinder and light modulation ring, gu fixed cylinder cover is located the focusing ring, the light modulation ring cover is located gu fixed cylinder, the interface is installed to the tip of light modulation ring.

As an improvement of an adjustment mechanism of a tight shot, the both ends of front mirror seat all are provided with the fitting pin, one of them the fitting pin passes focusing ring butt in front mirror seat, another the fitting pin passes the ring butt of adjusting luminance in a solid fixed cylinder.

As an improvement of guiding mechanism of tight shot, the quantity of guide nail is 2 ~ 6, a plurality of the guide nail centers on the rear mirror seat sets up.

The beneficial effects of the utility model reside in that, the utility model discloses an optical device and mechanical device, optical device includes the fixed group that sets gradually by the object space to the image space and transfers wide group, mechanical device include the front mirror seat and install in rear mirror seat in the front mirror seat, fixed group install in the front mirror seat, transfer wide group install in the rear mirror seat, the guide nail is installed to the lateral part of rear mirror seat, the lateral part cover of front mirror seat is equipped with the focusing ring, the focusing ring be provided with the curve groove that the guide nail matches, the curve groove passes through the guide nail drives transfer wide group seesaw. Because the focal length can only be adjusted by all lens groups of the existing lens, and partial lens groups can not be adjusted, the flexibility of the lens is reduced, therefore, the fixed group is fixed at the front part of the front lens base, the position of the fixed group is ensured not to be changed, meanwhile, the width adjusting group is installed in the rear lens base, the rear lens base is installed in the front lens base, a space for the front and back movement of the rear lens base is provided in the front lens base, the guide nail is installed at the side part of the rear lens base, the side part of the front lens base is sleeved with the focusing ring, the focusing ring is provided with a curve groove matched with the guide nail, the curve groove drives the width adjusting group to move back and forth through the guide nail, namely, the width adjusting group can move back and forth, the imaging visual field is adjusted by changing the position of the width adjusting group, the flexibility of the lens is improved, and. The focusing ring converts the rotary motion into the linear motion of the rear mirror base through the curve groove, namely, the linear motion of the width adjusting group, ensures that the width adjusting group moves along the direction of the optical axis, and realizes the control of the front and back motion of the width adjusting group. The utility model discloses can the motion of the partial mirror group of individual drive, help improving the flexibility of camera lens to improve user experience.

Drawings

Fig. 1 is a schematic sectional view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a schematic exploded sectional view of the present invention.

Fig. 4 is a schematic sectional exploded view of the front lens holder of the present invention.

Fig. 5 is a schematic sectional exploded view of the rear mirror base of the present invention.

Wherein: 1-fixed group; 2-width adjusting group; 3-front lens base; 4-rear mirror seat; 11-front pressing ring; 12-a first lens; 13-a first spacer ring; 14-a second lens; 15-a third lens; 16-a first cemented lens; 17-a second cage; 18-a sixth lens; 21-a seventh lens; 22-a third space ring; 23-a second cemented lens; 24-a fourth space ring; 25-a third cemented lens; 26-a fifth space ring; 27-an eighth lens; 28-rear pressing ring; 41-guide nail; 5-a focusing ring; 51-curved slot; 6-guide holes; 7-a cavity; 8-eliminating the diaphragm; 9-an iris diaphragm; 10-a fixed cylinder; 20-dimming ring; 201-interface; 30-locking nail.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", horizontal "and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The present invention will be described in further detail with reference to fig. 1 to 5, but the present invention is not limited thereto.

Embodiment mode 1

The utility model provides an guiding mechanism of tight shot, including optical device and mechanical device, optical device includes fixed group 1 and the wide group 2 of accent that sets gradually by the object space to the image space, mechanical device includes preceding microscope base 3 and installs rear mirror base 4 in preceding microscope base 3, fixed group 1 is installed in preceding microscope base 3, it installs in rear mirror base 4 to transfer wide group 2, guide nail 41 is installed to the lateral part of rear mirror base 4, the lateral part cover of preceding microscope base 3 is equipped with focusing ring 5, focusing ring 5 is provided with the curve groove 51 who matches with guide nail 41, curve groove 51 drives through guide nail 41 and transfers wide group 2 seesaws. Because the focal length of the existing lens can be adjusted simultaneously only by all lens groups, and partial lens groups cannot be adjusted, the flexibility of the lens is reduced, therefore, the fixed group 1 is fixed at the front part of the front lens base 3, the position of the fixed group 1 is ensured not to be changed, meanwhile, the width-adjusting group 2 is installed in the rear lens base 4, the rear lens base 4 is installed in the front lens base 3, a space for the rear lens base 4 to move back and forth is provided in the front lens base 3, the guide nail 41 is installed at the side part of the rear lens base 4, the focusing ring 5 is sleeved at the side part of the front lens base 3, the focusing ring 5 is provided with a curve groove 51 matched with the guide nail 41, the curve groove 51 drives the width-adjusting group 2 to move back and forth through the guide nail 41, even if the width-adjusting group 2 can move back and forth, the visual field of imaging is adjusted by changing the position of the width-adjusting group 2, the flexibility of.

The focusing ring 5 converts the rotary motion into the linear motion of the rear mirror base 4 through the curve groove 51, namely, the linear motion of the width adjusting group 2, so as to ensure that the width adjusting group 2 moves along the direction of an optical axis, control the front and back motion of the width adjusting group 2 is realized, the width adjusting group 2 is arranged on the rear mirror base 4, and is equivalent to a short-focus lens, and the imaging visual field is adjusted by changing the position of the width adjusting group 2; the tip of guide pin 41 is provided with the guide pin bushing, can avoid guide pin 41 to take place great displacement, helps improving the steadiness of guide pin 41.

Preferably, the front mirror base 3 is provided with a guide hole 6, the guide hole 6 extending in the moving direction of the guide pin 41. Increase guide hole 6, the guide pin 41 of being convenient for passes guide hole 6 and is fixed in rear mirror seat 4, when focusing ring 5 was rotary motion, curve groove 51 drove rear mirror seat 4 seesaw through guide pin 41, guide hole 6 extends along the moving direction of guide pin 41, ensures guide pin 41 seesaw, avoids guide pin 41 to take place to rock about, influences the adjustment precision of camera lens, guarantees to transfer wide group 2 and removes along the optical axis direction, helps improving the precision of camera lens adjustment. In this embodiment, rear mirror seat 4 is provided with guide hole 6 complex mounting hole, direction nail 41 and mounting hole threaded connection, nevertheless the utility model discloses not so limit, direction nail 41 and rear mirror seat 4 can also adopt other fixed connection's mode, and it can to satisfy to be fixed in rear mirror seat 4 with direction nail 41.

Preferably, the end of the front lens base 3 is provided with a cavity 7, and the rear lens base 4 is accommodated in the cavity 7. Increase cavity 7, provide the space of back mirror seat 4 back and forth activity, help realizing that the independent control transfers wide group 2 to carry out the seesaw, the internal diameter of cavity 7 and the external diameter cooperation of back mirror seat 4 reduce back mirror seat 4 and take place to rock in preceding mirror seat 3, guarantee to transfer wide group 2 to remove along the optical axis direction, help improving the precision of camera lens adjustment.

Preferably, an iris diaphragm 9 is arranged between the fixed group 1 and the width-adjusting group 2. The iris diaphragm 9 is used for limiting light beams in an optical system, and a user can adjust the position of the iris diaphragm 9 according to actual imaging requirements so as to achieve a better imaging effect.

Preferably, the fixed group 1 includes a first lens 12, a second lens 14, a third lens 15, a first cemented lens 16, and a sixth lens 18, which are arranged in this order along the optical axis. Increase first cemented lens 16, be favorable to controlling aberration and chromatic aberration in optical system to improve the formation of image effect of tight shot, but utility model does not use this as the limit, can be according to actual formation of image demand, the order of adjustment lens, in order to reach better formation of image effect.

Preferably, the width adjustment group 2 includes a seventh lens 21, a second cemented lens 23, a third cemented lens 25, and an eighth lens 27, which are arranged in this order along the optical axis. Increase second cemented lens 23 and third cemented lens 25, be favorable to controlling aberration and chromatic aberration in optical system to improve the imaging effect of tight shot, but utility model does not regard this as the limit, can be according to actual imaging demand, adjust the order of lens, in order to reach better imaging effect.

Preferably, the adjusting mechanism of the fixed focus lens further includes a fixing tube 10 and a light adjusting ring 20, the fixing tube 10 is sleeved on the focusing ring 5, the light adjusting ring 20 is sleeved on the fixing tube 10, and the end of the light adjusting ring 20 is provided with an interface 201. The fixed cylinder 10 ensures that the focusing ring 5 rotates around the front lens base 3 and cannot move along the direction of the optical axis, and meanwhile, the surface of the fixed cylinder 10 is provided with scales for calibrating the focusing ring 5 and the dimming ring 20, so that the fixed-focus lens is convenient to operate, and the operation error is reduced.

Preferably, the number of the guide pins 41 is 2, and a plurality of the guide pins 41 are provided around the mirror base 4. The number of the guide nails 41 is limited to be the minimum value, so that the situation that the curve groove 51 cannot stably drive the width adjusting group 2 to move back and forth through the guide nails 41 due to the fact that the number of the guide nails 41 is too small is prevented; the plurality of guide nails 41 are arranged around the rear mirror seat 4, so that the guide nails 41 in all directions of the rear mirror seat 4 can simultaneously drive the width adjusting group 2 to move back and forth, the width adjusting group 2 is ensured to move along the optical axis direction, and the adjustment precision of the lens is improved.

The utility model discloses a theory of operation is:

because the prior lens can only adjust the focal length of all lens groups simultaneously and can not adjust partial lens groups, the flexibility of the lens is reduced, therefore, the fixed group 1 is fixed at the front part of the front lens base 3, the position of the fixed group 1 is ensured not to be changed, meanwhile, the width-adjusting group 2 is arranged in the rear lens base 4, the rear lens base 4 is arranged in the front lens base 3, a space for the rear lens base 4 to move back and forth is provided in the front lens base 3, the guide nail 41 is arranged at the side part of the rear lens base 4, the focusing ring 5 is sleeved at the side part of the front lens base 3, the focusing ring 5 is provided with a curve groove 51 matched with the guide nail 41, the curve groove 51 drives the width-adjusting group 2 to move back and forth through the guide nail 41, even if the width-adjusting group 2 can move back and forth, the imaging visual field is adjusted by changing the position of the width-adjusting group 2, the flexibility of the lens is improved,

when the focusing ring 5 rotates, the curved groove 51 is driven to rotate, the rotation motion is converted into the linear motion of the rear lens base 4, namely, the linear motion of the width adjusting group 2, the width adjusting group 2 is ensured to move along the optical axis direction, the front-back motion of the width adjusting group 2 is controlled, the guide hole 6 extends along the moving direction of the guide nail 41, the front-back motion of the guide nail 41 is ensured, the adjusting precision of a lens is influenced, and the width adjusting group 2 is ensured to move along the optical axis direction.

Embodiment mode 2

The difference from embodiment 1 is: the length of the front lens base 3 of the present embodiment is greater than the length of the rear lens base 4, the fixed group 1 includes a front pressing ring 11, a first lens 12, a first spacer 13, a second lens 14, a third lens 15, a first cemented lens 16, a second spacer 17, and a sixth lens 18, which are sequentially disposed along the optical axis, the iris diaphragm 8 and the iris diaphragm 9 are sequentially disposed between the fixed group 1 and the width-adjusting group 2, and the number of the guide pins 41 is 6. The length of the front mirror base 3 is larger than that of the rear mirror base 4, so that a space for the rear mirror base 4 to move back and forth is formed on the front mirror base 3; the front pressing ring 11 plays a role in fixing the lens, and the lens is prevented from being displaced, so that the prime lens is prevented from being invalid; the first space ring 13 and the second space ring 17 can ensure enough distance between the lenses, thereby improving the imaging effect of the optical system; the number of the guide pins 41 is limited to the maximum value, and the excessive number of the guide pins 41 is prevented, which leads to an increase in the production cost of the lens.

The other structures are the same as those of embodiment 1, and are not described here.

Embodiment 3

The difference from embodiment 1 is: the curved groove 51 of the present embodiment is disposed around the sidewall of the focusing ring 5, the width adjusting group 2 includes a seventh lens 21, a third space ring 22, a second cemented lens 23, a fourth space ring 24, a third cemented lens 25, a fifth space ring 26, an eighth lens 27 and a rear pressure ring 28 which are sequentially disposed along the optical axis, locking nails 30 are disposed at both ends of the front lens holder 3, one of the locking nails 30 passes through the focusing ring 5 and abuts against the front lens holder 3, the other locking nail 30 passes through the adjusting ring 20 and abuts against the fixed cylinder 10, and the number of the guide nails 41 is 4. The curve groove 51 is arranged around the side wall of the focusing ring 5 and used for converting the rotary motion of the focusing ring 5 into the linear motion of the guide nail 41, and the guide nail 41 drives the rear mirror base 4 to move back and forth; the rear pressing ring 28 plays a role in fixing the lens, so that the lens is prevented from being displaced, and the fixed-focus lens is prevented from being invalid; the third space ring 22, the fourth space ring 24 and the fifth space ring 26 can ensure enough distance between the lenses, so that the imaging effect of the optical system is improved; the quantity of injecing guide pin 41 is median, satisfies the manufacturing cost who reduces the camera lens, simultaneously, ensures that the stable back and forth motion of transferring wide group 2 of passing through guide pin 41 drive of curve groove 51, reduces the probability that rear mirror seat 4 takes place to rock, guarantees to transfer wide group 2 and removes along the optical axis direction.

Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides an adjustment mechanism of tight shot which characterized in that: including optical device and mechanical device, optical device includes fixed group (1) and the wide group (2) of accent that set gradually by the object space to the image space, mechanical device include preceding microscope base (3) and install in back microscope base (4) in preceding microscope base (3), fixed group (1) install in preceding microscope base (3), transfer wide group (2) install in back microscope base (4), guide nail (41) are installed to the lateral part of back microscope base (4), the lateral part cover of preceding microscope base (3) is equipped with focusing ring (5), focusing ring (5) be provided with curve groove (51) that guide nail (41) match, curve groove (51) pass through guide nail (41) drive transfer wide group (2) seesaw.

2. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: the front lens base (3) is provided with a guide hole (6), and the guide hole (6) extends along the moving direction of the guide nail (41).

3. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: the curved groove (51) is arranged around the side wall of the focusing ring (5).

4. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: the end part of the front mirror seat (3) is provided with a cavity (7), the rear mirror seat (4) is accommodated in the cavity (7), and the length of the front mirror seat (3) is greater than that of the rear mirror seat (4).

5. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: an iris diaphragm (8) and an iris diaphragm (9) are sequentially arranged between the fixed group (1) and the width adjusting group (2).

6. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: the fixed group (1) comprises a front pressing ring (11), a first lens (12), a first spacing ring (13), a second lens (14), a third lens (15), a first cemented lens (16), a second spacing ring (17) and a sixth lens (18) which are sequentially arranged along an optical axis.

7. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: the width adjusting group (2) comprises a seventh lens (21), a third space ring (22), a second cemented lens (23), a fourth space ring (24), a third cemented lens (25), a fifth space ring (26), an eighth lens (27) and a rear pressing ring (28) which are sequentially arranged along an optical axis.

8. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: the adjusting mechanism of the fixed-focus lens further comprises a fixed barrel (10) and a dimming ring (20), the fixed barrel (10) is sleeved on the focusing ring (5), the dimming ring (20) is sleeved on the fixed barrel (10), and an interface (201) is installed at the end part of the dimming ring (20).

9. An adjusting mechanism for a fixed focus lens as claimed in claim 8, wherein: both ends of the front mirror seat (3) are provided with locking nails (30), one of the locking nails (30) penetrates through the focusing ring (5) and is abutted to the front mirror seat (3), and the other locking nail (30) penetrates through the focusing ring (20) and is abutted to the fixed cylinder (10).

10. An adjusting mechanism of a fixed focus lens as claimed in claim 1, characterized in that: the quantity of guide nail (41) is 2 ~ 6, and is a plurality of guide nail (41) surround rear mirror seat (4) set up.