CN221551044U

CN221551044U - Automatic focusing device

Info

Publication number: CN221551044U
Application number: CN202420099125.3U
Authority: CN
Inventors: 朱亚君; 唐亚; 吴建午
Original assignee: Dongguan Yutong Optical Technology Co Ltd
Current assignee: Dongguan Yutong Optical Technology Co Ltd
Priority date: 2024-01-16
Filing date: 2024-01-16
Publication date: 2024-08-16
Anticipated expiration: 2034-01-16

Abstract

The utility model belongs to the technical field of lens focusing, and discloses an automatic focusing device, which comprises a base, a sleeve, a motor and a transmission assembly, wherein the base is provided with a mounting hole, and the inner wall of the mounting hole is provided with a spiral guide groove; the sleeve is rotatably arranged in the mounting hole, the outer wall of the sleeve is provided with a guide post, the guide post is slidably inserted into the spiral guide groove, and the lens is arranged in the sleeve; the transmission assembly is connected between the output end of the motor and the sleeve in a transmission manner, and when the motor drives the sleeve to rotate around the Z axis through the transmission assembly, the guide post slides in the spiral guide groove and drives the sleeve and the lens to move along the Z axis direction. The utility model optimizes the structure of the automatic focusing device and reduces the cost.

Description

Automatic focusing device

Technical Field

The utility model relates to the technical field of lens focusing, in particular to an automatic focusing device.

Background

Currently, the application field of the MTV lens is very wide, and when the MTV lens is used, in order to ensure shooting definition, after the lens body and the base are installed, the distance between the lens body and the COMS module needs to be adjusted, that is, the focal length needs to be adjusted.

At present, the form of adjusting the focal length is divided into two types, one type is manual focusing, the other type is automatic focusing device focusing, if manual focusing is relied on, the device is easy to be affected by vibration or external environment factors, the adjusting precision is low, the cleanliness is not guaranteed, poor imaging is easily caused, the manual assembly efficiency is low, the cost is high, therefore, the current commonly adopted focusing mode is to focus through the automatic focusing device, the automatic focusing device generally comprises a focusing mechanism and a power mechanism, and the power mechanism is used for driving the focusing mechanism to focus on a lens.

However, the existing automatic focusing device is relatively complex in structure and high in cost.

Disclosure of utility model

One object of the present utility model is to: the automatic focusing device is provided, the structure is optimized, and the cost is reduced.

To achieve the purpose, the utility model adopts the following technical scheme:

An autofocus apparatus for focusing a lens, the autofocus apparatus comprising:

the base is provided with a mounting hole, and the inner wall of the mounting hole is provided with a spiral guide groove;

The sleeve is rotatably installed in the installation hole, a guide post is arranged on the outer wall of the sleeve, the guide post is slidably inserted into the spiral guide groove, and the lens is installed in the sleeve;

The motor is connected between the output end of the motor and the sleeve in a transmission way, and when the motor drives the sleeve to rotate around the Z axis through the transmission component, the guide column slides in the spiral guide groove and drives the sleeve and the lens to move along the Z axis direction.

As an optional technical scheme, the port inner wall of the mounting hole is provided with a sliding groove extending along the Z-axis direction, the sliding groove is communicated with the spiral guide groove, and the guide column slides into the spiral guide groove from the sliding groove.

As an optional technical scheme, the lateral wall of mounting hole radially runs through and has seted up first screw hole, first screw hole with spiral guide way or slide-in groove intercommunication, automatic focusing device still includes the spacing screw, spacing screw thread install in first screw hole and extend to spiral guide way or slide-in groove, the spacing screw be used for with the guide post restriction in spiral guide way.

As an optional technical scheme, the inner wall of the mounting hole is provided with three spiral guide grooves, the outer wall of the sleeve is provided with three guide posts in an equidistant surrounding manner, and the three guide posts are in one-to-one correspondence with the three spiral guide grooves.

As an optional technical scheme, one end of the spiral guide groove far away from the sliding-in groove is provided with a limiting part, and the limiting part is used for limiting the guide column to the spiral guide groove.

As an optional technical scheme, the transmission assembly is a reduction gear set, the outer wall of the sleeve is provided with a gear part, and the reduction gear set is in meshed transmission connection with the gear part.

As an optional technical solution, the autofocus device further includes a protective cover, and the reduction gear set is disposed inside the protective cover.

As an optional technical scheme, a side of the protective cover facing the gear part is provided with an avoidance opening, and the reduction gear set is meshed with the gear part at the avoidance opening.

As an optional technical scheme, the base has been seted up the second screw hole, the connecting hole has been seted up to the safety cover, automatic focusing device still includes the lock attaches the screw, lock attaches the screw pass the connecting hole and threaded connection in the second screw hole, lock attaches the screw be used for with the safety cover lock attach in the base.

As an optional technical scheme, the base and/or the sleeve are/is made of plastic materials.

The utility model has the beneficial effects that:

The automatic focusing device comprises a base, a sleeve, a motor and a transmission assembly, wherein the base is provided with a mounting hole, the inner wall of the mounting hole is provided with a spiral guide groove, the outer wall of the sleeve is provided with a guide column, the guide column is inserted into the spiral guide groove in a sliding mode, and the transmission assembly is connected between the output end of the motor and the sleeve in a transmission mode. When needs focus to the camera lens, install the camera lens in the sleeve, the starter motor, the motor passes through drive assembly and drives the sleeve and rotate around the Z axis, and the camera lens of installing on the sleeve at this moment follows the sleeve and rotates around the Z axis, and sets up the guide post of outer wall in the sleeve and slide in spiral guide way, because the spacing effect and the guide effect of spiral guide way for the guide post can drive sleeve and camera lens and follow Z axial direction and remove, can adjust the focus. The automatic focusing device provided by the utility model has simple structure and low use cost.

Drawings

The utility model is described in further detail below with reference to the drawings and examples;

Fig. 1 is a schematic structural view of a first view angle of an autofocus apparatus according to an embodiment;

FIG. 2 is an exploded view of a first view angle of an autofocus apparatus according to an embodiment;

FIG. 3 is an exploded view of a second view of an autofocus apparatus according to an embodiment;

FIG. 4 is a schematic view of a base according to an embodiment;

fig. 5 is a schematic structural view of a sleeve according to an embodiment.

In the figure:

100. a lens;

1. A base; 11. a mounting hole; 12. a spiral guide groove; 13. sliding into the groove; 14. a first threaded hole; 15. a second threaded hole;

2. a sleeve; 21. a guide post; 22. a gear portion;

3. a motor;

4. A transmission assembly;

5. A limit screw;

6. A protective cover; 61. an avoidance opening;

7. And locking and attaching a screw.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 5, the present embodiment provides an autofocus apparatus for focusing a lens 100, the autofocus apparatus includes a base 1, a sleeve 2, a motor 3, and a transmission assembly 4, the base 1 is provided with a mounting hole 11, and a spiral guide groove 12 is formed in an inner wall of the mounting hole 11; the sleeve 2 is rotatably installed in the installation hole 11, a guide post 21 is arranged on the outer wall of the sleeve 2, the guide post 21 is slidably inserted into the spiral guide groove 12, and the lens 100 is installed in the sleeve 2; the transmission assembly 4 is in transmission connection between the output end of the motor 3 and the sleeve 2, and when the motor 3 drives the sleeve 2 to rotate around the Z axis through the transmission assembly 4, the guide column 21 slides in the spiral guide groove 12 and drives the sleeve 2 and the lens 100 to move along the Z axis direction.

When the lens 100 needs to be focused, the lens 100 is arranged on the sleeve 2, the motor 3 is started, the motor 3 drives the sleeve 2 to rotate around the Z axis through the transmission component 4, at the moment, the lens 100 arranged on the sleeve 2 follows the sleeve 2 to rotate around the Z axis, the guide column 21 arranged on the outer wall of the sleeve 2 slides in the spiral guide groove 12, and the guide column 21 can drive the sleeve 2 and the lens 100 to move along the Z axis direction due to the limiting effect and the guide effect of the spiral guide groove 12, so that the focal length can be adjusted. The automatic focusing device provided by the embodiment has simple structure and low use cost.

The sleeve 2 is in threaded connection with the lens 100, the lens 100 is in threaded connection with the inner cavity of the sleeve 2, when the focal length of the lens 100 with another diameter specification needs to be adjusted, the sleeve 2 is replaced, the outer diameter of the new sleeve 2 is unchanged compared with that of the old sleeve 2, the inner diameter of the new sleeve 2 is changed, and the lens 100 can be rapidly in threaded connection with the inner cavity of the new sleeve 2.

Optionally, a sliding groove 13 extending along the Z-axis direction is formed in the inner wall of the port of the mounting hole 11, the sliding groove 13 is communicated with the spiral guide groove 12, and the guide post 21 slides into the spiral guide groove 12 from the sliding groove 13.

When the sleeve 2 needs to be disassembled, the sleeve 2 is rotated to enable the guide column 21 to be aligned with the spiral guide groove 12 in the Z-axis direction, so that the sleeve 2 and the guide column 21 are separated from the base 1 together; when it is necessary to mount the sleeve 2, the guide post 21 is aligned with the spiral guide groove 12 in the Z-axis direction, so that the guide post 21 slides into the spiral guide groove 12, and the sleeve 2 is inserted into the mounting hole 11 of the base 1. The sleeve 2 of this embodiment is easy to assemble and disassemble, and the speed of replacing the sleeve 2 can be increased.

Optionally, the side wall of the mounting hole 11 is radially perforated with a first threaded hole 14, the first threaded hole 14 is communicated with the spiral guide groove 12 or the sliding-in groove 13, the automatic focusing device further comprises a limit screw 5, the limit screw 5 is mounted on the first threaded hole 14 in a threaded manner and extends to the spiral guide groove 12 or the sliding-in groove 13, and the limit screw 5 is used for limiting the guide column 21 to the spiral guide groove 12.

In the focal length adjustment process, the limit screw 5 can limit the guide post 21 to the spiral guide groove 12, so that the guide post 21 is prevented from sliding out of the base 1 from the sliding-in groove 13, namely, the sleeve 2 and the lens 100 are prevented from being separated from the base 1; when the sleeve 2 needs to be replaced, the limit screw 5 is withdrawn from the spiral guide groove 12 or slid into the groove 13, and the limit screw 5 no longer blocks the guide post 21, so that the guide post 21 can slide out of and into the groove 13.

Optionally, the inner wall of the mounting hole 11 is provided with three spiral guide grooves 12, the outer wall of the sleeve 2 is provided with three guide posts 21 in an equidistant surrounding manner, and the three guide posts 21 are in one-to-one correspondence with the three spiral guide grooves 12. The three guide posts 21 are used for supporting and guiding the sleeve 2, so that the stability of the sleeve 2 in rotation around the Z axis and the stability of the sleeve in movement along the Z axis can be improved.

Optionally, a limiting portion is provided at an end of the spiral guide groove 12 remote from the slide-in groove 13, and the limiting portion is used for limiting the guide post 21 to the spiral guide groove 12. The guide post 21 is prevented from being separated from the spiral guide groove 12 from the end of the spiral guide groove 12 remote from the slide-in groove 13, and in this embodiment, the end of the spiral guide groove 12 remote from the slide-in groove 13 does not extend to the other port of the mounting hole 11, and the guide post 21 cannot slide out from the other port of the mounting hole 11.

In this embodiment, the transmission assembly 4 is a reduction gear set, the outer wall of the sleeve 2 is provided with a gear portion 22, and the reduction gear set is in meshed transmission connection with the gear portion 22. The adoption of the reduction gear set can ensure the transmission precision so as to improve the focal length adjustment precision.

Optionally, the autofocus device further includes a protective cover 6, and the reduction gear set is disposed inside the protective cover 6. Utilize safety cover 6 to keep apart reduction gear set, avoid dust impurity to float to reduction gear set on, guarantee reduction gear set's transmission precision, and can avoid the operator direct contact reduction gear set, avoid appearing the incident.

Optionally, a relief opening 61 is provided on the side of the protective cover 6 facing the gear portion 22, and the reduction gear set is meshed with the gear portion 22 at the relief opening 61.

Optionally, the base 1 is provided with a second threaded hole 15, the protection cover 6 is provided with a connecting hole, the automatic focusing device further comprises a locking screw 7, the locking screw 7 penetrates through the connecting hole and is in threaded connection with the second threaded hole 15, and the locking screw 7 is used for locking the protection cover 6 on the base 1.

Optionally, the base 1 and/or the sleeve 2 are made of plastic materials. The plastic material has relatively low price and can reduce the cost.

Optionally, the transmission assembly 4, the limiting threads, the protecting cover 6 and the locking screw 7 are all made of plastic materials.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. An autofocus for focusing a lens (100), the autofocus comprising:

The device comprises a base (1), wherein the base (1) is provided with a mounting hole (11), and a spiral guide groove (12) is formed in the inner wall of the mounting hole (11);

The sleeve (2) is rotatably installed in the installation hole (11), a guide column (21) is arranged on the outer wall of the sleeve (2), the guide column (21) is slidably inserted into the spiral guide groove (12), and the lens (100) is installed in the sleeve (2);

The lens comprises a motor (3) and a transmission assembly (4), wherein the transmission assembly (4) is in transmission connection with the output end of the motor (3) and the sleeve (2), and when the motor (3) drives the sleeve (2) to rotate around a Z axis through the transmission assembly (4), the guide column (21) slides in the spiral guide groove (12) and drives the sleeve (2) and the lens (100) to move along the Z axis direction.

2. Autofocus arrangement according to claim 1, characterized in that the inner wall of the port of the mounting hole (11) is provided with a slide-in groove (13) extending in the Z-axis direction, the slide-in groove (13) being in communication with the spiral guide groove (12), the guide post (21) being slid from the slide-in groove (13) into the spiral guide groove (12).

3. Autofocus arrangement according to claim 2, characterized in that the side wall of the mounting hole (11) is provided with a first threaded hole (14) extending radially therethrough, the first threaded hole (14) being in communication with the screw guide groove (12) or the slide-in groove (13), the autofocus arrangement further comprising a limit screw (5), the limit screw (5) being threadedly mounted to the first threaded hole (14) and extending to the screw guide groove (12) or the slide-in groove (13), the limit screw (5) being adapted to limit the guide post (21) to the screw guide groove (12).

4. An autofocus arrangement according to claim 3, characterized in that the inner wall of the mounting hole (11) is provided with three spiral guide grooves (12), the outer wall of the sleeve (2) is provided with three guide posts (21) at equal intervals, and the three guide posts (21) are in one-to-one correspondence with the three spiral guide grooves (12).

5. Autofocus arrangement according to claim 2, characterized in that the end of the spiral guide groove (12) remote from the slide-in groove (13) is provided with a limit for limiting the guide post (21) to the spiral guide groove (12).

6. Autofocus arrangement according to claim 1, characterized in that the transmission assembly (4) is a reduction gear set, the outer wall of the sleeve (2) being provided with a gear part (22), the reduction gear set being in meshed transmission connection with the gear part (22).

7. The autofocus device of claim 6, further comprising a protective cover (6), wherein said reduction gear set is disposed inside said protective cover (6).

8. Autofocus arrangement according to claim 7, characterized in that the side of the protective cover (6) facing the gear part (22) is provided with a relief opening (61), the reduction gear set being in engagement with the gear part (22) at the relief opening (61).

9. Autofocus arrangement according to claim 7, characterized in that the base (1) is provided with a second threaded hole (15), the protective cover (6) is provided with a connecting hole, the autofocus arrangement further comprises a locking screw (7), the locking screw (7) passes through the connecting hole and is screwed to the second threaded hole (15), the locking screw (7) is used for locking the protective cover (6) to the base (1).

10. Autofocus arrangement according to claim 1, characterized in that the material of the base (1) and/or the sleeve (2) is a plastic material.