CN222280927U - Lens focusing structure and infrared lens - Google Patents

Abstract

The utility model discloses a lens focusing structure and an infrared lens, wherein the lens focusing structure comprises a base, a focusing device, a fixed lens barrel and an adjustable lens barrel, the fixed lens barrel is relatively and fixedly arranged on the base, the adjustable lens barrel is sleeved in the fixed lens barrel, the focusing device is arranged on the fixed lens barrel, the focusing device rotates to drive the adjustable lens barrel to axially move, an elastic piece is arranged between the focusing device and the base, and the elastic piece is used for providing elastic pressing force along the axial direction for the focusing device. According to the utility model, the adjustable lens barrel is driven to axially move through the rotation of the focusing device, so that the lens on the adjustable lens barrel is moved, focusing is performed, and the elastic piece is arranged between the focusing device and the base, and the assembly gap between the focusing device and the base is eliminated through the elastic piece, so that the installation stability between each component of the lens focusing structure is enhanced, and the optical axis of the lens is ensured to be kept stable in the focusing process.

Description

Lens focusing structure and infrared lens

Technical Field

The present utility model relates to the field of optical devices, and in particular, to a lens focusing structure and an infrared lens.

Background

The infrared lens is used as an important component of the thermal imaging product, the performance of the infrared lens directly influences the effect of the thermal imaging product, and the reliability of the lens focusing mechanism greatly influences the aiming performance of the thermal imaging product.

Because the infrared lens is high in requirement on the consistency of the optical axis of the lens due to the application scene of the product, the focusing structure of the lens is complex, parts are more, and the lens is required to focus under different application scenes to realize clear imaging, because the structure is adjustable, the assembly and matching of the parts can have clearance problems, but the clearance can lead to unstable optical axis of the lens to influence the aiming function of a thermal imaging product.

Therefore, how to eliminate the assembly gap of the lens focusing structure and ensure the stability of the optical axis of the lens is a technical problem that needs to be solved by the person skilled in the art.

Disclosure of utility model

The utility model provides a lens focusing structure and an infrared lens, which are used for solving the technical problem that an optical axis of the lens is unstable due to an assembly gap between the existing lens focusing structures.

In order to achieve the above object, in a first aspect, the present utility model provides a lens focusing structure, including a base, a focusing device, a fixed lens barrel, and an adjustable lens barrel, where the fixed lens barrel is relatively and fixedly mounted on the base, the adjustable lens barrel is sleeved in the fixed lens barrel, the focusing device is mounted on the fixed lens barrel, the focusing device rotates to drive the adjustable lens barrel to axially move, and an elastic member is further disposed between the focusing device and the base, and the elastic member is used to provide an elastic supporting force along an axial direction for the focusing device.

As a further improvement of the above technical scheme:

The focusing device comprises a focusing hand wheel, a threaded adapter and a guide structure, wherein the threaded adapter is sleeved on the fixed lens barrel, the focusing hand wheel is sleeved on the threaded adapter and is in threaded connection with the threaded adapter, one end face of the focusing hand wheel is abutted against the elastic piece, the other end face is abutted against the fixed lens barrel, the focusing hand wheel rotates to drive the threaded adapter to move along the axial direction, and the threaded adapter and the adjustable lens barrel are guided and linked in the axial direction through the guide structure.

As a further improvement of the above technical scheme:

The fixing lens barrel is provided with a plurality of strip-shaped through holes, the guide structure comprises guide nails which are arranged corresponding to the through holes, one ends of the guide nails are fixedly connected with the threaded adapter, and the other ends of the guide nails penetrate through the through holes and are fixedly connected with the adjustable lens barrel.

As a further improvement of the above technical scheme:

The adjustable lens cone is provided with a lens cone threaded hole, the threaded adapter is provided with an adapter threaded through hole corresponding to the lens cone threaded hole, and the guide screw passes through the through hole after entering the adapter threaded through hole in a threaded mode and is in threaded connection with the adjustable lens cone.

As a further improvement of the above technical scheme:

The guide nails are provided with positioning steps, and when the guide nails spirally enter the threaded through holes of the adapter, the entering quantity of the guide nails is limited through the positioning steps.

As a further improvement of the above technical scheme:

The focusing hand wheel is provided with a circle of annular bulge, one end face of the annular bulge is abutted against one end face of the elastic piece, the other end face of the elastic piece is arranged on the base, the inner ring of the elastic piece is abutted against the fixed lens barrel, and the elastic piece is used for eliminating gaps among the base, the focusing hand wheel and the fixed lens barrel.

As a further improvement of the above technical scheme:

The elastic piece is a wave spring.

As a further improvement of the above technical scheme:

The wave spring is provided with a plurality of through holes, the base is provided with cylinders corresponding to the through holes on the wave spring one by one, and the cylinders are used for positioning the wave spring and limiting radial movement of the wave spring.

As a further improvement of the above technical scheme:

The fixed lens barrel is fixed on the base through a fastening screw.

In a second aspect, the present utility model further provides an infrared lens, including an infrared lens and the lens focusing structure of the first aspect, where the infrared lens is installed in the adjustable lens barrel.

The utility model has the following beneficial effects:

In the above embodiment, the adjustable lens barrel is driven to axially move by the rotation of the focusing device, so that the lens on the adjustable lens barrel moves, focusing is performed by the movement of the lens barrel, and an elastic piece is further arranged between the focusing device and the base, and provides elastic supporting force along the axial direction for the focusing device by the elastic piece, so that the assembly gap between the focusing device and the base can be eliminated, the installation stability between each component of the lens focusing structure is enhanced, and the stability of the optical axis of the lens in the focusing process is ensured.

In the above embodiments, the infrared lens and the corresponding lens focusing structure embodiment belong to the same concept, so that the infrared lens and the corresponding lens focusing structure embodiment have the same technical effects, and are not described herein again.

In addition to the objects, features and advantages described above, the present utility model has other objects, features and advantages. The utility model will be described in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 is an exploded view of a lens focusing assembly according to one embodiment of the present utility model;

fig. 2 is a cross-sectional view of a lens focusing structure according to an embodiment of the present utility model.

Wherein, the reference numerals are as follows:

1. The device comprises a base, 11 parts of a cylinder, 2 parts of a focusing device, 21 parts of a focusing hand wheel, 211 parts of an annular protrusion, 22 parts of a threaded adapter, 221 parts of an adapter threaded through hole, 23 parts of a guide pin, 3 parts of a fixed lens barrel, 31 parts of a through hole, 4 parts of an adjustable lens barrel, 41 parts of a lens barrel threaded hole, 5 parts of an elastic part, 6 parts of a fastening screw.

Detailed Description

The technical scheme of the utility model is further elaborated below by referring to the drawings in the specification and the specific embodiments. Furthermore, unless defined otherwise, technical or scientific terms used in the description of the utility model should be given the ordinary meaning as understood by one of ordinary skill in the art to which the utility model pertains. The terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," "outer," and the like as used in the description of the present utility model are merely used for indicating relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and that the relative positional relationships may be changed when the absolute position of the object to be described is changed, thus not being construed as limiting the utility model. The terms "first," "second," "third," and the like, as used in the description of the present utility model, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance to the various components. The use of the terms "a," "an," or "the" and similar referents in the description of the utility model are not to be construed as limiting the amount absolutely, but rather as existence of at least one. The use of the terms "comprising" or "includes" and the like in this description of the utility model, are intended to cover an element or article that appears before the term or article and equivalents thereof, but does not exclude other elements or articles.

It should be further noted that, unless explicitly stated or limited otherwise, terms such as "mounted," "connected," and the like, used in the description of the present application should be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, and in communication with each other, as would be understood by one skilled in the art, in the present application, as appropriate.

As shown in fig. 1 and 2, the lens focusing structure of the present embodiment includes a base 1, a focusing device 2, a fixed lens barrel 3 and an adjustable lens barrel 4, the fixed lens barrel 3 is relatively fixedly mounted on the base 1, the adjustable lens barrel 4 is sleeved in the fixed lens barrel 3, the focusing device 2 is mounted on the fixed lens barrel 3, the focusing device 2 rotates to drive the adjustable lens barrel 4 to axially move, an elastic member 5 is further disposed between the focusing device 2 and the base 1, and the elastic member 5 is used for providing an elastic supporting force along an axial direction to the focusing device 2. In the lens focusing structure, the focusing device 2 rotates to drive the adjustable lens barrel 4 to axially move to realize focusing, and the elastic piece 5 is arranged between the focusing device 2 and the base 1, so that the elastic piece 5 can provide elastic pressing force along the axial direction for the focusing device 2 in the axial movement focusing process of the adjustable lens barrel 4, and the assembly gap between the focusing device 2 and the base 1 is eliminated, so that the installation stability between each component of the lens focusing structure can be enhanced, and the stability of the optical axis of the lens in the focusing process is ensured.

The adjustable lens barrel 4 is used for installing lenses, the fixed lens barrel 3 is relatively fixedly installed on the base 1, specifically, in the embodiment, the fixed lens barrel 3 passes through the base 1 through the fastening screw 6 and then is connected with the fixed lens barrel 3 in a threaded manner, so that the fixed lens barrel 3 is fixed on the base 1, the focusing device 2 is installed on the fixed lens barrel 3 and is connected with the adjustable lens barrel 4, the adjustable lens barrel 4 can be driven to axially move through rotating the focusing device 2, the lenses on the adjustable lens barrel 4 are further moved, the lens focusing function is achieved, meanwhile, an elastic piece 5 is arranged between the focusing device 2 and the base 1, the elastic piece 5 is used for providing elastic supporting force along the axial direction for the focusing device 2, and eliminating axial gaps between the focusing device 2 and the base 1, so that the installation stability of a lens focusing structure is enhanced, and the optical axis of a lens is kept stable in the focusing process.

Optionally, the focusing device 2 includes a focusing hand wheel 21, a thread adapter 22 and a guiding structure, the thread adapter 22 is sleeved on the fixed lens barrel 3, the focusing hand wheel 21 is sleeved on the thread adapter 22 and is in threaded connection with the thread adapter 22, one end face of the focusing hand wheel 21 is abutted against the elastic piece 5, the other end face is abutted against the fixed lens barrel 3, the focusing hand wheel 21 rotates to drive the thread adapter 22 to move along the axial direction, and guiding and linkage of the axial direction are realized between the thread adapter 22 and the adjustable lens barrel 4 through the guiding structure.

Wherein, screw thread adaptor 22 cover is located on the fixed lens cone 3, screw thread adaptor 22 and with screw thread adaptor 22 threaded connection are located to the cover of focusing hand wheel 21, the terminal surface butt elastic component 5 of one end of focusing hand wheel 21, the terminal surface butt fixed lens cone 3 of the other end, because focusing hand wheel 21 both ends terminal surface receives the restriction, consequently when rotating focusing hand wheel 21, focusing hand wheel 21 can not produce axial displacement, only make screw thread adaptor 22 along axial direction motion, and realize axial direction's guide and linkage through guide structure between screw thread adaptor 22 and the adjustable lens cone 4 for screw thread adaptor 22 drives adjustable lens cone 4 and moves together when following axial direction motion.

Specifically, in order to drive the adjustable lens barrel 4 to move together when the threaded adapter 22 moves along the axial direction, in this embodiment, a plurality of strip-shaped through holes 31 are provided on the fixed lens barrel 3, the guiding structure includes guide pins 23 corresponding to the through holes 31, one end of the guide pins 23 is fixedly connected with the threaded adapter 22, and the other end of the guide pins 23 passes through the through holes 31 and is fixedly connected with the adjustable lens barrel 4.

In other embodiments, any number of through holes 31 may be selected according to practical needs, and the through holes 31 are holes with long sections, so that the guide pins 23 can move in the through holes 31, one end of the guide pins 23 is fixedly connected with the threaded adapter 22, and the other end of the guide pins 23 passes through the through holes 31 and is fixedly connected with the adjustable lens barrel 4, so that the threaded adapter 22 drives the adjustable lens barrel 4 to move together when moving along the axial direction.

Optionally, the adjustable lens barrel 4 is provided with a lens barrel threaded hole 41, the threaded adaptor 22 is provided with an adaptor threaded through hole 221 corresponding to the lens barrel threaded hole 41, and the guide pin 23 is screwed into the adaptor threaded through hole 221 and then passes through the through hole 31 to enter the lens barrel threaded hole 41, so that two ends of the guide pin 23 are respectively connected with the threaded adaptor 22 and the adjustable lens barrel 4 in a threaded manner.

Optionally, the guide pin 23 is provided with a positioning step, and when the guide pin 23 is screwed into the adaptor threaded through hole 221, the amount of the guide pin 23 is limited by the positioning step.

Specifically, a step corresponding to the positioning step is also provided inside the adaptor threaded through hole 221, when the guide pin 23 is screwed into the adaptor threaded through hole 221, and when the positioning step of the adaptor threaded through hole 221 collides with the step in the adaptor threaded through hole 221, the guide pin 23 cannot enter continuously at this time, so that the entering amount of the guide pin 23 is limited, the guide pin 23 is prevented from completely entering the adaptor threaded through hole 221 to cause subsequent detachment difficulty, and meanwhile, the guide pin 23 is prevented from entering too deeply to cause damage to the adjustable lens barrel 4.

Optionally, a ring-shaped protrusion 211 is disposed on the focusing hand wheel 21, one end face of the ring-shaped protrusion 211 is abutted against one end face of the elastic member 5, the other end face of the elastic member 5 is disposed on the base 1, an inner ring of the elastic member 5 is abutted against the fixed lens barrel 3, the elastic member 5 is used for eliminating a gap between the base 1, the focusing hand wheel 21 and the fixed lens barrel 3, the ring-shaped protrusion 211 is disposed on the focusing hand wheel 21, one end face of the ring-shaped protrusion 211 is located on the elastic member 5, the other end face can limit the axial displacement of the thread adapter 22, and the focusing hand wheel 21 below the ring-shaped protrusion 211 is sleeved on the base 1, so that the focusing hand wheel 21 is sleeved on the base 1 and the fixed lens barrel 3 at the same time, and one end of the fixed lens barrel 3, which is close to the base 1, is closed.

Optionally, the elastic member 5 is a wave spring, and compared with a common elastic member, the wave spring has the characteristics of light weight, small installation space and good elasticity, and is convenient to assemble and meet the requirement of eliminating the gap between the base 1, the focusing hand wheel 21 and the fixed lens barrel 3 when being applied to the embodiment.

Optionally, the wave spring is provided with a plurality of perforations, the base 1 is provided with cylinders 11 corresponding to the perforations on the wave spring one by one, and the cylinders 11 are used for positioning the wave spring and limiting radial movement of the wave spring.

The assembly process of the lens focusing structure of the embodiment comprises the steps of arranging an adjustable lens barrel 4 in a fixed lens barrel 3, sleeving a threaded adapter 22 on the fixed lens barrel 3, aligning a through hole 31 of the fixed lens barrel 3, an adapter threaded through hole 221 on the threaded adapter 22 and a lens barrel threaded hole 41 of the adjustable lens barrel 4, enabling a guide pin 23 to enter the adapter threaded through hole 221 and then pass through the through hole 31 to enter the lens barrel threaded hole 41 until a positioning step of the guide pin 23 is clamped in the through hole 31, sleeving a focusing hand wheel 21 on the threaded adapter 22, enabling internal threads on the inner side of the focusing hand wheel 21 to be in threaded connection with external threads on the outer surface of the threaded adapter 22, arranging a wave spring on a cylinder 11 of a base 1, and finally inserting the fixed lens barrel 3 along the inner side of the wave spring until one end face of an annular protrusion 211 of the focusing hand wheel 21 abuts against the wave spring and then stopping.

The lens focusing structure of the embodiment eliminates the gap between the base 1, the focusing hand wheel 21 and the fixed lens barrel 3, ensures the stability of the optical axis of the product, can improve the processing yield of structural members and reduces the cost.

In another aspect of the present application, an infrared lens including the lens focusing structure of the present application is further provided, where the infrared lens further includes an infrared lens mounted in the adjustable lens barrel 4.

When the adjustable lens barrel 4 moves axially, the infrared lens is driven to move together, so that lens focusing is realized, the infrared lens structure is more stable, and the stability of an optical axis during focusing is ensured.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a camera lens focusing structure, its characterized in that, includes base (1), focusing device (2), fixed lens cone (3) and adjustable lens cone (4), fixed lens cone (3) relatively fixedly install in on base (1), adjustable lens cone (4) cover is located in fixed lens cone (3), focusing device (2) install in on fixed lens cone (3), focusing device (2) rotate in order to drive adjustable lens cone (4) axial motion, focusing device (2) with still be equipped with elastic component (5) between base (1), elastic component (5) are used for focusing device (2) provide along axial direction's elasticity holding pressure.

2. The lens focusing structure according to claim 1, wherein the focusing device (2) comprises a focusing hand wheel (21), a threaded adapter (22) and a guiding structure, the threaded adapter (22) is sleeved on the fixed lens barrel (3), the focusing hand wheel (21) is sleeved on the threaded adapter (22) and is in threaded connection with the threaded adapter (22), one end face of the focusing hand wheel (21) is abutted against the elastic piece (5), the other end face is abutted against the fixed lens barrel (3), the focusing hand wheel (21) rotates to drive the threaded adapter (22) to move along the axial direction, and guiding and linkage of the axial direction are achieved between the threaded adapter (22) and the adjustable lens barrel (4) through the guiding structure.

3. The lens focusing structure according to claim 2, wherein the fixed lens barrel (3) is provided with a plurality of strip-shaped through holes (31), the guide structure comprises guide nails (23) which are arranged corresponding to the through holes (31), one ends of the guide nails (23) are fixedly connected with the threaded adapter (22), and the other ends of the guide nails are fixedly connected with the adjustable lens barrel (4) after penetrating through the through holes (31).

4. A lens focusing structure according to claim 3, wherein the adjustable lens barrel (4) is provided with a lens barrel threaded hole (41), the threaded adaptor (22) is provided with an adaptor threaded through hole (221) corresponding to the lens barrel threaded hole (41), and the guide pin (23) is screwed into the adaptor threaded through hole (221) and then penetrates through the through hole (31) to be in threaded connection with the adjustable lens barrel (4).

5. The lens focusing structure according to claim 4, wherein a positioning step is provided on the guide pin (23), and when the guide pin (23) is screwed into the adaptor threaded through hole (221), the amount of the guide pin (23) is limited by the positioning step.

6. The lens focusing structure according to claim 2, wherein a ring-shaped protrusion (211) is provided on the focusing hand wheel (21), one end face of the ring-shaped protrusion (211) abuts against one end face of the elastic member (5), the other end face of the elastic member (5) is provided on the base (1), an inner ring of the elastic member (5) abuts against the fixed lens barrel (3), and the elastic member (5) is used for eliminating gaps among the base (1), the focusing hand wheel (21) and the fixed lens barrel (3).

7. Lens focusing configuration according to claim 1, characterized in that the elastic element (5) is a wave spring.

8. The lens focusing structure according to claim 7, wherein the wave spring is provided with a plurality of perforations, the base (1) is provided with cylinders (11) corresponding to the perforations on the wave spring one by one, and the cylinders (11) are used for positioning the wave spring and limiting radial movement of the wave spring.

9. The lens focusing structure according to claim 1, wherein the fixed barrel (3) is fixed to the base (1) by a fastening screw (6).

10. An infrared lens characterized by comprising an infrared lens and the lens focusing structure according to any one of claims 1 to 9, said infrared lens being mounted in said adjustable barrel (4).