CN107991749A - Focusing mechanism and lens suitable for same - Google Patents

Abstract

The present invention discloses a focusing mechanism and a lens applicable thereto. The focusing mechanism is applicable to adjusting a lens assembly, and includes a focusing cylinder and at least one auxiliary positioning assembly. The focusing cylinder is rotatably sleeved on the lens assembly, and the focusing cylinder has at least one groove, and the groove has a side wall. Each auxiliary positioning assembly includes a collar and a fixing member, wherein the collar is disposed on the groove and the lens assembly, and the collar partially matches the side wall of the groove, and the fixing member is passed through the collar and fixedly disposed on the lens assembly. When the focusing cylinder rotates, the auxiliary positioning assembly moves along the groove relative to the focusing cylinder, so that the lens assembly is driven to focus. By providing an auxiliary positioning assembly that matches the side wall of the groove, the wear of the groove is reduced, and at the same time, the precision and stability of the lens focusing are increased, thereby achieving the effect of improving the imaging quality.

Description

Focus mechanism and its applicable lens

technical field

The invention relates to a focus adjustment mechanism, especially a focus adjustment mechanism with an auxiliary positioning component and an applicable lens thereof.

Background technique

In products with lenses such as projectors and cameras, it is often necessary to zoom the lens magnification to adjust the focal length. In the prior art, rollers are installed in the grooves on the lens housing to cooperate with each other to guide and drive the lens to stretch and focus. The grooves have different processing characteristics due to the use of different materials. .

Generally speaking, during the testing phase of the lens, metal grooves are used for testing for precision and stability. When it comes to the mass production stage, plasticized grooves are generally used to reduce the overall weight of the lens and reduce production costs.

However, since the plasticized groove is made of plastic material, its hardness is low, and it is easy to cause wear when the roller moves in the groove. Moreover, when the plastic is injection molded, it needs a film-drawing angle to release the film, and the shape caused by the film-drawing angle in the groove will contact and rub against the roller, making the groove easy to deform due to wear, and The lens is prone to shaking or tilting during focusing, thereby affecting the image quality.

Therefore, how to develop a focusing mechanism that is different from the past and its applicable lens to improve the problems and shortcomings in the prior art, and reduce the wear caused by the roller moving in the groove, and at the same time increase the focusing efficiency. Precision and stability, in order to achieve the effect of improving the image quality, is actually a key issue in the current technical field.

Contents of the invention

The main purpose of the present invention is to provide a focusing mechanism and its applicable lens, so as to solve and improve the above-mentioned problems and shortcomings of the prior art.

Another object of the present invention is to provide a focusing mechanism and its applicable lens. By setting an auxiliary positioning component matching the side wall of the groove, the wear of the groove is reduced, the groove is less likely to be deformed, and the auxiliary The stability of positioning components moving in the groove.

Another object of the present invention is to provide a focusing mechanism and its applicable lens. By forming surface contact between the auxiliary positioning component and the groove of the focusing cylinder, the precision and stability of lens focusing can be increased, thereby achieving an improvement. The effect of image quality.

To achieve the above purpose, a preferred embodiment of the present invention is a focusing mechanism for a lens, which is suitable for adjusting a lens assembly. The focusing mechanism includes: a focusing barrel, which is rotatably sleeved on the lens component, and the focusing cylinder has at least one groove, the groove has a side wall; and at least one auxiliary positioning component, wherein each of the auxiliary positioning components includes: a collar, arranged on the groove and the lens assembly, and the collar is partially matched with the side wall of the groove; and a fixing member is passed through the collar and fixed on the lens assembly; wherein, when the focusing cylinder rotates, The auxiliary positioning assembly moves relative to the focusing cylinder along the groove, so that the lens assembly is driven for focusing.

To achieve the above object, another preferred embodiment of the present invention is a lens, comprising: a lens assembly including a lens and a casing, wherein the casing is sleeved on the lens; and a focusing mechanism, It includes: a focusing barrel, which is rotatably sleeved on the casing, and the focusing barrel has at least one groove, and the groove has a side wall; and at least one auxiliary positioning component, each of which is auxiliary The positioning component includes: a collar, which is arranged on the groove and the housing, and partially matches the side wall of the groove; and a fixing piece, which is passed through the collar and fixed on the lens ; Wherein, when the focusing cylinder rotates, the auxiliary positioning assembly moves relative to the focusing cylinder along the groove, so that the lens assembly is driven for focusing.

Description of drawings

FIG. 1 shows a schematic structural diagram of a focusing mechanism and its applicable lens in a preferred embodiment of the present invention.

FIG. 2 shows a schematic diagram of the detailed structure of the focusing mechanism shown in FIG. 1 .

FIG. 3 shows a cross-sectional view of the focusing mechanism shown in FIG. 2 .

Among them, reference signs

1: Focusing mechanism

2: Lens assembly

20: lens

21: Housing

210: Longitudinal groove

3: Focusing barrel

30: Groove

4: Auxiliary positioning components

40: Collar

400: head

401: Extension

41: Fixing piece

L1: inner diameter groove width

L2: outer diameter groove width

H: perforated

S: Peripheral surface

W: side wall

P1: first anchor point

P2: Second anchor point

Detailed ways

Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention can have various changes in different aspects without departing from the scope of the present invention, and the descriptions and illustrations therein are used as illustrations in nature rather than limiting the present invention .

Please refer to Fig. 1, Fig. 2 and Fig. 3, wherein Fig. 1 shows the structure schematic diagram of the focusing mechanism of the preferred embodiment of the present invention and the applicable lens thereof, and Fig. 2 shows the detailed structural diagram of the focusing mechanism shown in Fig. 1, And FIG. 3 shows a cross-sectional view of the focusing mechanism shown in FIG. 2 . As shown in Figure 1, Figure 2 and Figure 3, the focus adjustment mechanism 1 of the lens of the present invention is suitable for adjusting the lens assembly 2, and the focus adjustment mechanism 1 includes a focus adjustment barrel 3 and at least one auxiliary positioning assembly 4, wherein the lens assembly 2 is, for example, but not limited to, a lens assembly for a projector or a camera, and the auxiliary positioning component is, for example, but not limited to a roller assembly.

According to the concept of the present invention, the focusing barrel 3 is rotatably sleeved on the lens assembly 2 , and the focusing barrel 3 has at least one groove 30 , and the groove 30 has a sidewall W. Moreover, each auxiliary positioning component 4 includes a collar 40 and a fixing member 41, wherein the collar 40 is arranged on the groove 30 and the lens assembly 2, and the collar 40 is partially matched with the side wall W of the groove 30 to be fixed. The member 41 is passed through the collar 40 and fixed on the lens assembly 2 . Thereby, the collar 40 is firmly fixed.

Wherein, when the focusing barrel 3 rotates, the auxiliary positioning assembly 4 moves relative to the focusing barrel 3 along the groove 30, so that the lens assembly 2 is driven for focusing. For example, when the focusing cylinder 3 rotates, the auxiliary positioning assembly 4 reciprocates relative to the focusing cylinder 3 along the groove 30 between the first positioning point P1 and the second positioning point P2, so that the lens assembly 2 is Drive telescoping for focusing. Moreover, since the auxiliary positioning assembly 4 has been fixed on the lens assembly 2 , it moves relative to the focusing barrel 3 along the groove 30 and does not rotate due to the rotation of the focusing barrel 3 .

In some embodiments, the auxiliary positioning component 4 is disposed in the groove 3 and fixed on the lens component 2 , wherein the way of fixing on the lens component 2 is, for example, embedding, embedding or penetrating, but not limited thereto. The collar 40 can be, for example, a roller, and the fixing member 41 can be, for example, a bolt, but they are not limited thereto.

According to the concept of the present invention, the collar 40 further includes a head 400 and an extension 401, wherein the head 400 has an outer peripheral surface S, and the outer peripheral surface S matches the side wall W of the groove 30, and the extension of the collar 40 401 extends from the head 400 , and the extending portion 401 has a through hole H, wherein the fixing member 41 is passed through the through hole H and fixed on the lens assembly 2 .

In some embodiments, the outer peripheral surface S of the head 400 is a tapered surface, that is, a surface that gradually decreases from the head 400 to the extension portion 401 to match and form surface contact with the sidewall W of the groove 30 . Since the focusing barrel 3 is mostly made of plastic material, a draft angle is required during molding to facilitate demoulding. Therefore, the inner diameter groove width L1 of the groove 30 is smaller than the outer diameter groove width L2, and the outer circumference of the head 400 Face S is beveled to match sidewall W of trench 30 having a draft angle. In other words, when the sidewall W of the trench 30 is tapered from the outside to the inside, the head 400 matches the tapered profile of the sidewall W at the same angle. In other embodiments, the upper edge of the head 400 has a first perimeter, and the junction of the head 400 and the extension 401 has a second perimeter, wherein the first perimeter is greater than the second perimeter, so that the outer perimeter S A tapered surface, but not limited to.

In other words, the present invention provides a focusing mechanism, by providing an auxiliary positioning component matched with the side wall of the groove, so that the auxiliary positioning component is in surface contact with the groove of the focusing barrel, so as to reduce the wear of the groove, Moreover, the stability of the auxiliary positioning component when moving relative to the focusing cylinder in the groove is improved, thereby achieving the effect of improving the imaging quality. It should be noted that the present invention is generally applicable to fixed-focus lenses and zoom lenses, and the focus adjustment mechanism can be used to adjust the distance (Zoom in/out) of the lens, adjust the appropriate focal length or other optical aspects of the lens in practice. Properties, such as the switching of the optical filter or the aperture (not shown in the figure), all physical properties are applicable to the adjustment of the lens on the mechanism, which can be associated by those skilled in the art according to the concept of the present invention use.

According to the concept of the present invention, the lens assembly 2 further includes a lens 20 and a housing 21, wherein the housing 21 is sleeved on the lens 20, the focusing tube 3 is rotatably sleeved on the housing 21, and the collar 40 is disposed on the housing. 21, and the fixing part 41 is fixed on the lens 20, so that the focusing mechanism 1 and the lens assembly 2 form a lens for application in devices such as projectors or cameras.

In other words, the present invention provides a lens, including a focusing mechanism 1 and a lens assembly 2 , wherein the lens assembly 2 includes a lens 20 and a housing 21 , and the housing 21 is sleeved on the lens 20 . The focus adjustment mechanism 1 includes a focus adjustment cylinder 3 and an auxiliary positioning assembly 4, wherein the focus adjustment cylinder 3 is rotatably sleeved on the housing 21, and the focus adjustment cylinder 3 has at least one groove 30, and the groove 30 has a side Wall W. Moreover, each auxiliary positioning component 4 includes a collar 40 and a fixing member 41, wherein the collar 40 is arranged on the groove 30 and the housing 21, and the collar 40 is partially matched with the side wall W of the groove 30 to be fixed. The element 41 is passed through the collar 40 and fixed on the lens 20 . Wherein, when the focusing barrel 3 rotates, the auxiliary positioning assembly 4 moves relative to the focusing barrel 3 along the groove 30, so that the lens assembly 2 is driven for focusing.

According to the concept of the present invention, the housing 21 has at least one longitudinal groove 210 corresponding to the groove 30 . For example, the longitudinal groove 210 of the casing 21 is arranged along the direction in which the lens assembly 2 expands and contracts during focusing, and the longitudinal groove 210 is adjacent to the groove 30 of the focusing barrel 3, so that the auxiliary positioning component 4 can move along the groove. 30 moves along the longitudinal groove 210 at the same time to drive the lens assembly 2 and perform focus adjustment, wherein the groove 30, the auxiliary positioning assembly 4 and the longitudinal groove 210 are arranged corresponding to each other, and the number is not limited to one.

In some embodiments, the fixing member 41 is, for example, a bolt, and has a bolt head and a threaded portion, the bolt head engages with the head 400 of the collar 40, and the threaded portion is passed through the hole H and screwed with the lens 20, The auxiliary positioning assembly 4 is integrally fixed on the lens assembly 2, so that the lens assembly 2 is driven to expand and contract during focusing.

In some other embodiments, the groove 30 is, for example, a curved groove, and the curved groove extends along the cylindrical surface of the focusing cylinder 3 . For example, the focusing barrel 3 of the focusing mechanism 1 has three grooves 30, which are evenly distributed on the barrel surface of the focusing barrel 3, for example, are arranged at intervals of 120 degrees on a 360-degree barrel surface, and the focus Mechanism 1 has three auxiliary positioning assemblies 4 respectively arranged in three grooves 30. When the focusing barrel 3 rotates, the three auxiliary positioning assemblies 4 move relative to the focusing barrel 3 along the three grooves 30, so that The lens assembly 2 is driven to adjust the focus, but not limited thereto.

To sum up, the present invention provides a focusing mechanism and its applicable lens. By setting an auxiliary positioning component that matches the side wall of the groove, the wear of the groove is reduced, and the groove is less likely to be deformed, so as to enhance the auxiliary positioning. The stability of positioning components moving in the groove. In addition, by forming surface contact between the auxiliary positioning component and the groove of the focusing cylinder, the precision and stability of lens focusing are increased, thereby achieving the effect of improving image quality.

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and modifications without departing from the spirit and scope of the present invention. But these changes and modifications should all be included in the scope of protection of the appended claims of the present invention.

Claims (10)

1. A focusing mechanism of a lens, which is suitable for adjusting a lens assembly, is characterized in that the focusing mechanism comprises: A focusing cylinder is rotatably sleeved on the lens assembly, and the focusing cylinder has at least one groove, and the groove has a side wall; and At least one auxiliary positioning assembly, each of which includes: a collar disposed over the groove and the lens assembly, the collar partially matching the sidewall of the groove; and A fixing piece is installed on the collar and fixed on the lens assembly; Wherein, when the focusing cylinder rotates, the auxiliary positioning assembly moves relative to the focusing cylinder along the groove, so that the lens assembly is driven for focusing. 2. The focusing mechanism according to claim 1, wherein the collar further comprises: A head has an outer peripheral surface, wherein the outer peripheral surface is matched with the side wall of the groove; and an extension portion has a through hole, wherein the fixing member is passed through the through hole. 3. The focusing mechanism as claimed in claim 2, wherein the outer peripheral surface of the head is a tapered surface. 4. The focusing mechanism as claimed in claim 2, wherein the inner diameter of the groove is smaller than the outer diameter of the groove, and the outer peripheral surface of the head is a slope. 5. The focusing mechanism according to claim 1, wherein the lens assembly comprises a lens and a housing, the housing is sleeved on the lens, and the focusing cylinder is rotatably sleeved on the housing body, the collar is arranged on the casing, and the fixing member is fixed on the lens. 6. The focusing mechanism according to claim 5, wherein the housing has at least one longitudinal groove, which is arranged corresponding to the groove, and when the auxiliary positioning component moves along the groove, it simultaneously moves along the longitudinal groove , so that the lens assembly is driven for focusing. 7. The focusing mechanism according to claim 5, wherein the fixing member is a bolt, the bolt has a bolt head and a threaded portion, wherein the bolt head is engaged with the head of the collar , and the threaded part is passed through the through hole and screwed with the lens. 8. The focusing mechanism according to claim 1, wherein when the focusing cylinder rotates, the auxiliary positioning component reciprocates along the groove between a first positioning point and a second positioning point, to make the lens assembly stretchable. 9. The focusing mechanism according to claim 1, wherein the groove is a curved groove, and the curved groove extends along the cylinder surface of the focusing cylinder. 10. A lens, characterized in that it comprises: A lens assembly, including a lens and a casing, wherein the casing is sleeved on the lens; and A focusing mechanism, including: A focusing cylinder is rotatably sleeved on the casing, and the focusing cylinder has at least one groove, and the groove has a side wall; and At least one auxiliary positioning assembly, each of which includes: a collar disposed between the groove and the housing and partially mating with the sidewall of the groove; and A fixing part is installed on the collar and fixed on the lens; Wherein, when the focusing cylinder rotates, the auxiliary positioning assembly moves relative to the focusing cylinder along the groove, so that the lens assembly is driven for focusing.