CN112230365A

CN112230365A - Lens radial clearance adjusting mechanism

Info

Publication number: CN112230365A
Application number: CN202011173445.1A
Authority: CN
Inventors: 付效奎; 刘星; 于磊; 鲁泉林
Original assignee: Jinan Hope Wish Photoelectronic Technology Co ltd
Current assignee: Jinan Hope Wish Photoelectronic Technology Co ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2021-01-15
Anticipated expiration: 2040-10-28
Also published as: CN112230365B

Abstract

The invention provides a lens radial clearance adjusting mechanism, which adopts the following scheme: the adjusting device comprises an adjusting device, one end of the adjusting device penetrates through a lens barrel and a sliding sleeve of the lens and then is connected with the lens frame, and the other end of the adjusting device is exposed outside the lens barrel and can drive the lens frame to move along the radial direction of the lens frame after force is applied to the end. Through adjusting device of installation on the lens cone, through externally to this adjusting device application of force, drive the mirror holder and remove, can realize the regulation to the clearance between mirror holder and the sliding sleeve, and then guarantee the imaging effect, adjust through mechanical structure, solved present mirror holder and sliding sleeve fit clearance through the precision that relies on machining and can not guarantee the problem of imaging effect.

Description

Lens radial clearance adjusting mechanism

Technical Field

The invention relates to the technical field of optical lenses, in particular to a lens radial clearance adjusting mechanism.

Background

With the development of modern optical technology, the continuous zoom lens is widely and massively applied in the field of security monitoring. At present, the imaging effect and quality of the lens in the zooming and focusing processes need to be improved, and the key parts need to be realized by mechanical structures.

At present, most of structures of zooming and focusing parts adopt a cam mechanism, a gear on a lens barrel drives a sliding sleeve to rotate through a driving rod arranged on the sliding sleeve, a cam curve groove on the sliding sleeve drives a guide stud on a lens frame to move back and forth along a straight line groove of the lens barrel, the front and back position movement of a lens is realized, and the continuous zoom lens is ensured to realize clear imaging of a target after zooming and focusing. However, if the gap between the lens frame and the sliding sleeve is not well controlled, the image is easy to shake during zooming and focusing, and the imaging quality is affected. And at present, the requirement that the fit clearance meets the imaging effect is ensured only by depending on the precision of machining, and certain difficulty exists.

Therefore, to the problem that the control of the gap between the lens frame and the sliding sleeve is not good in the existing lens, the problem that the development of a lens which can adjust the gap between the lens frame and the sliding sleeve by means of a mechanical structure so as to ensure the imaging effect is urgently needed to be solved.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a lens radial clearance adjusting mechanism to solve the problem that the imaging effect cannot be ensured only by ensuring the fit clearance between a lens frame and a sliding sleeve through the machining precision.

The technical scheme adopted by the invention for solving the technical problems is as follows: a radial clearance adjusting mechanism for a lens comprises an adjusting device, wherein one end of the adjusting device penetrates through a lens barrel and a sliding sleeve of the lens and then is connected with a lens frame, and the other end of the adjusting device is exposed outside the lens barrel and can drive the lens frame to move along the radial direction after force is applied to the end. Through adjusting device of installation on the lens cone, through externally to this adjusting device application of force, drive the mirror holder and remove, can realize the regulation to the clearance between mirror holder and the sliding sleeve, and then guarantee the imaging effect, adjust through mechanical structure, solved present mirror holder and sliding sleeve fit clearance through the precision that relies on machining and can not guarantee the problem of imaging effect.

Furthermore, adjusting device includes regulating lever subassembly, guide block, the guide block is installed in the outside of lens cone and the bottom surface of guide block and the lateral surface laminating of lens cone, the regulation pole subassembly passes the guide block and is connected with the mirror holder, install the subassembly that resets between regulating lever subassembly and the guide block. The adjusting rod is supported and guided through the guide block, the adjusting rod assembly is used for adjusting the mirror bracket, and the adjusting mechanism is simple in structure and convenient to operate.

Furthermore, the adjusting rod assembly comprises an adjusting rod and a nut sleeve, the front end of the adjusting rod is connected with the lens barrel, and the rear end of the adjusting rod is in threaded connection with the nut sleeve. Utilize the screw drive principle, through twisting the nut and drive adjusting lever radial movement, adjust the lever and drive lens cone radial movement, and then adjust the clearance between mirror holder and the sliding sleeve, realize adjusting with mechanical structure's mode, carry out manual regulation according to actual conditions in order to guarantee the imaging.

Furthermore, the reset assembly comprises a first spring and a second spring, the first spring is sleeved on the adjusting rod and located on the inner side of the guide block, and the second spring is sleeved on the adjusting rod and located on the outer side of the guide block.

Furthermore, the adjusting rod comprises a front end thread part, a column body part and a rear end thread part, the front end thread part is in threaded connection with the mirror bracket, and the rear end thread part is in threaded connection with the nut sleeve. The adjusting rod is in threaded connection with the spectacle frame, so that the mounting is facilitated.

Further, a flange is arranged on the column body part, the flange is located on the inner side of the guide block and located on the outer side of the lens barrel, the first spring is located between the flange and the guide block, and the second spring is located between the nut sleeve and the guide block. The elastic force of the spring is matched with the force manually applied to the nut sleeve to drive the adjusting rod to move in two directions along the radial direction, and the nut sleeve is reasonable in design and convenient to operate.

Further, the first spring and the second spring are both opposite-vertex wave springs. The opposite-vertex wave spring is utilized to achieve the purpose of saving occupied space, and compared with a common spiral pressure spring, the opposite-vertex wave spring can save about half of space when bearing similar load.

Furthermore, the guide block comprises two support legs, and the bottom surfaces of the support legs, which are matched with the lens cone, are cambered surfaces. The contact area between the guide block and the lens barrel is increased, and the supporting strength is enhanced.

Furthermore, the column body part sequentially penetrates through the lens barrel and the sliding sleeve, and the rear end thread part penetrates through the guide block.

According to the technical scheme, the invention has the following advantages:

through adjusting the pole, the cooperation between guide block and the opposite vertex wave spring, adjust the pole rear end and connect the nut cover, front end and mirror holder threaded connection, form a simple and easy mechanical regulation structure, through twisting nut cover and realize adjusting the removal of pole along radial two sides under the effect of spring, and then drive the mirror holder and remove, realize the change in clearance between mirror holder and the sliding sleeve between the two, accomplish the regulation in clearance between mirror holder and the sliding sleeve with mechanical structure's mode, manual regulation according to actual conditions, the problem that the precision that the cooperation clearance between present mirror holder and sliding sleeve relies on machining can not guarantee the imaging effect is solved.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the internal structure of fig. 1.

Fig. 3 is a schematic structural view of the adjusting lever in fig. 1.

Fig. 4 is a schematic structural view of the guide block in fig. 1.

In the figure, 1, a lens frame, 2, a sliding sleeve, 3, a lens barrel, 4, an adjusting rod, 5, a first spring, 6, a guide block, 7, a second spring, 8, a nut sleeve, 41, a front end threaded part, 42, a column body part, 43, a rear end threaded part, 44, a flange, 61 and a supporting leg.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of this patent.

As shown in fig. 1-4, the present invention provides a radial gap adjustment mechanism for a lens, which comprises a lens barrel 3, a sliding sleeve 2, and a lens frame 1 from outside to inside in sequence, wherein a lens is mounted on the lens frame 1, and in order to ensure an imaging effect, a gap between the lens frame 1 and the sliding sleeve 2 is adjusted in a mechanical structure manner.

Specifically, as shown in fig. 2, the adjusting device includes an adjusting rod 4 assembly, a guide block 6, the guide block 6 is installed at the outer side of the lens barrel 3, the bottom surface of the guide block 6 is attached to the outer side surface of the lens barrel 3, the adjusting rod 4 assembly passes through the guide block 6 to be connected to the lens frame 1, a reset assembly is installed between the adjusting rod 4 assembly and the guide block 6, the adjusting rod 4 is supported and guided by the guide block 6, the guide block 6 includes two support legs 61, the bottom surface of the support legs 61, which is matched with the lens barrel 3, is an arc surface to increase the contact area between the guide block 6 and the lens barrel 3, and enhance the support strength, wherein the adjusting rod 4 assembly includes an adjusting rod 4 and a nut sleeve 8, the front end of the adjusting rod 4 is connected to the lens frame 1, the rear end of the adjusting rod 4 is in threaded connection with the nut sleeve 8, as shown in fig. 3, the adjusting rod 4 can be divided, the front end threaded part 41 is in threaded connection with the spectacle frame 1, the column body part 42 sequentially penetrates through the lens barrel 3 and the sliding sleeve 2, the rear end threaded part 43 penetrates through the guide block 6, the rear part of the rear end threaded part 43 is in threaded connection with the nut sleeve 8, the nut is screwed to drive the adjusting rod 4 to move radially by utilizing the principle of screw transmission, the adjusting rod 4 drives the spectacle frame 1 to move radially, and then the gap between the spectacle frame 1 and the sliding sleeve 2 is adjusted.

Wherein, the reset assembly includes the first spring 5 and the second spring 7, the first spring 5 is fitted on the regulating lever 4 and located inside the guide block 6, the second spring 7 is fitted on the regulating lever 4 and located outside the guide block 6, specifically, there is a flange 44 on the shaft body part 42, the function of the flange 44 is that the excircle is used for screwing the front end screw thread with the mirror holder, the outer end plane is used for holding the spring 5 in addition, the flange 44 is located inside the guide block 6 and located outside the lens-barrel 3, the first spring 5 is located between flange 44 and the guide block 6, its front and back both ends contact or connect with the upper end of the flange 44 and the lower end of the middle part of the guide block 6 respectively, the second spring 7 is located between nut sleeve 8 and the guide block 6, its front end contacts or connects with the upper end of the middle part of the guide block 6, the back end contacts with the lower part of the nut sleeve 8, the force that applies to the nut sleeve 8 manually by using the spring force cooperates with the realization that drives the regulating lever 4 in two directions along the radial direction The movement of (2) is reasonable in design and convenient to operate.

In addition, the first spring 5 and the second spring 7 are opposite-vertex wave springs, the opposite-vertex wave springs are utilized to achieve the purpose of saving occupied space, and compared with a common spiral pressure spring, the opposite-vertex wave springs can save about half of space when bearing similar loads.

The terms "upper", "lower", "outside", "inside", and the like in the description and claims of the present invention and the above-described drawings (if any) are used for distinguishing relative positions without necessarily being construed qualitatively. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a radial clearance adjustment mechanism of camera lens which characterized in that, includes adjusting device, adjusting device's one end is passed lens cone (3), sliding sleeve (2) of camera lens and is connected with mirror holder (1), adjusting device's the other end exposes in the outside of lens cone (3) and can drive mirror holder (1) along its radial direction removal behind this end application of force.

2. The lens radial gap adjusting mechanism according to claim 1, wherein the adjusting device comprises an adjusting rod assembly and a guide block (6), the guide block (6) is installed outside the lens barrel (3) and the bottom surface of the guide block (6) is attached to the outer side surface of the lens barrel (3), the adjusting rod assembly passes through the guide block (6) to be connected with the lens frame (1), and a reset assembly is installed between the adjusting rod assembly and the guide block (6).

3. The lens radial gap adjustment mechanism according to claim 2, wherein the adjustment lever assembly comprises an adjustment lever (4) and a nut sleeve (8), a front end portion of the adjustment lever (4) is connected with the lens frame (1), and a rear end portion of the adjustment lever (4) is screw-connected with the nut sleeve (8).

4. The lens radial gap adjustment mechanism according to claim 3, wherein the reset assembly comprises a first spring (5) and a second spring (7), the first spring (5) is sleeved on the adjustment lever (4) and located at the inner side of the guide block (6), and the second spring (7) is sleeved on the adjustment lever (4) and located at the outer side of the guide block (6).

5. The lens radial gap adjustment mechanism according to claim 4, wherein the adjustment lever (4) includes a front threaded portion (41), a barrel portion (42), and a rear threaded portion (43), the front threaded portion (41) being threadedly coupled to the lens holder (1), and the rear threaded portion (43) being threadedly coupled to the nut sleeve (8).

6. The lens radial gap adjustment mechanism according to claim 5, wherein a flange (44) is provided on the barrel portion (42), the flange (44) is located inside the guide block (6) and outside the lens barrel (3), the first spring (5) is located between the flange (44) and the guide block (6), and the second spring (7) is located between the nut sleeve (8) and the guide block (6).

7. The lens radial gap adjustment mechanism according to claim 6, wherein the first spring (5) and the second spring (7) are both elastic elements.

8. The lens radial gap adjustment mechanism according to claim 2, wherein the guide block (6) includes two legs (61), and a bottom surface of the leg (61) that engages with the lens barrel (3) is a curved surface.

9. The lens radial gap adjustment mechanism according to claim 5, wherein the cylindrical body portion (42) passes through the lens barrel (3) and the sliding sleeve (2) in this order, and the rear end threaded portion (43) passes through the guide block (6).