CN216145007U - Focusing device and lens with same - Google Patents

Abstract

The utility model discloses a focusing device, comprising: installation component, camera lens carrier, actuating mechanism and stop gear. The mounting component is provided with a mounting cavity with a mounting opening; the lens carrier is movably arranged in the mounting cavity in a penetrating way through the mounting port and comprises a lens barrel and a first limiting part fixedly connected with the lens barrel; the driving mechanism is used for enabling the lens carrier to move along a preset direction; the limiting mechanism comprises a first limiting part and an adjusting component used for adjusting the position of the first limiting part, the first limiting part comprises a second limiting part which is arranged opposite to the first limiting part along a preset direction, and the second limiting part can abut against the first limiting part which moves along the preset direction. A lens comprises the focusing device and a lens assembly, wherein the lens assembly is fixedly connected with a lens carrier. The focusing device and the lens thereof can finely adjust the maximum focusing distance of the lens through the adjusting assembly, and meanwhile, the lens carrier is more stably connected with the lens assembly.

Description

Focusing device and lens with same

Technical Field

The utility model relates to the field of imaging devices, in particular to a focusing device and a lens with the same.

Background

With the increasingly smaller size of imaging devices such as digital cameras and video cameras, the focusing structure of the lens is increasingly miniaturized. Most of the traditional micro focusing structures are focusing structures formed by mutually matching coils and magnets. The focusing principle is that the electrified coil moves along the preset direction under the action of Lorentz force in a magnetic field generated by the magnet, so that the lens is driven to move back and forth along the preset direction, and the focusing function is realized. These focusing structures often do not allow fine tuning of the maximum focus distance of the lens.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a focusing device and a lens with the same, which can solve the problem that the maximum focusing distance of the lens cannot be finely adjusted when a micro-driving focusing structure is used.

A focusing apparatus according to an embodiment of a first aspect of the present invention includes: the mounting assembly is provided with a mounting cavity with a mounting opening; the lens carrier is movably arranged in the mounting cavity in a penetrating manner through the mounting opening and comprises a lens barrel and a first limiting part arranged on the outer wall of the lens barrel; the driving mechanism is used for driving the lens carrier to move along a preset direction; and the limiting mechanism comprises a first limiting part and an adjusting component in transmission connection with the first limiting part, the first limiting part comprises a second limiting part which is arranged opposite to the preset direction along the first limiting part, the second limiting part can be abutted against the first limiting part moving along the preset direction, and the adjusting component is used for adjusting the position of the first limiting part so as to enable the second limiting part to move along the preset direction.

The focusing device provided by the embodiment of the utility model at least has the following technical effects:

when the focusing device is used for focusing, the driving mechanism is operated to enable the lens carrier to move along the preset direction under the driving force, so that the focusing function is realized. When the first limiting part is abutted against the second limiting part, the lens carrier is at the maximum focusing distance. When the range of the focusing distance needs to be reduced, the adjusting assembly is operated to adjust the position of the first limiting piece, so that the second limiting part moves along the preset direction and approaches to the first limiting part at the initial position; when the range of the focusing distance needs to be enlarged, the adjusting assembly is operated to adjust the position of the first limiting piece, so that the second limiting part moves along the preset direction and is far away from the first limiting part at the initial position. So, through the regulation of adjusting part to the position of first locating part, just can finely tune the biggest focus distance of camera lens.

According to some embodiments of the utility model, the mounting assembly comprises a base and a housing arranged on the base, the base and the housing cooperate to form the mounting cavity, and the mounting opening is formed on the housing.

According to some embodiments of the present invention, the adjusting assembly includes a first adjusting member connected to the base and a second adjusting member in transmission connection with the first adjusting member, and the second adjusting member is fixedly connected to the first limiting member; the first adjusting piece can drive the second adjusting piece and the first limiting piece to move together along the preset direction.

According to some embodiments of the utility model, the first adjusting member is a threaded rod, and the second adjusting member is a nut, the nut being sleeved outside the threaded rod.

According to some embodiments of the present invention, the first position-limiting member further includes a sliding portion slidably sleeved outside the housing, and a connecting portion for connecting the sliding portion and the second position-limiting portion; the sliding part and the second limiting part are arranged along the radial direction of the lens barrel at intervals and oppositely and are fixedly connected with the second adjusting piece.

According to some embodiments of the present invention, the lens carrier further includes a first elastic connecting member and a second elastic connecting member respectively disposed at two ends of the lens barrel, the first elastic connecting member is fixedly connected to the housing, and the second elastic connecting member is fixedly connected to the base; the first elastic connecting piece and the second elastic connecting piece are matched to form a limiting structure which is used for limiting the lens carrier in the installation cavity and can move along a preset direction.

According to some embodiments of the present invention, the driving mechanism includes a magnet assembly disposed in the mounting cavity and a coil fixedly sleeved outside the lens barrel, the magnet assembly includes a first magnet and a second magnet disposed opposite to and spaced from the first magnet, and the coil is disposed between the first magnet and the second magnet.

According to some embodiments of the present invention, a limiting groove is formed between the coil and the outer wall of the lens barrel, and the first limiting portion is movably inserted into the limiting groove.

According to some embodiments of the present invention, the lens carrier further includes a third position-limiting portion disposed on the outer wall of the lens barrel, the third position-limiting portion is in position-limiting fit with the second position-limiting portion, and the third position-limiting portion is configured to prevent the lens carrier from rotating around the axis of the lens barrel.

A lens barrel according to an embodiment of the second aspect of the present invention includes the focusing device as described above and a lens assembly fixedly connected with the lens carrier.

The lens according to the embodiment of the utility model has at least the following technical effects:

the maximum focusing distance of the lens can be finely adjusted, and meanwhile, the lens carrier is connected with the lens assembly more stably.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic cross-sectional view of a focusing device according to an embodiment of the present invention;

FIG. 2 is a top cross-sectional view of a focusing device according to an embodiment of the present invention;

FIG. 3 is a front cross-sectional view of a focusing device in accordance with an embodiment of the present invention;

fig. 4 is a partial schematic view of fig. 3 at graph a.

Reference numerals:

100. mounting the component; 110. a base; 120. a housing; 200. a lens carrier; 210. a lens barrel; 220. a first limiting part; 230. a first elastic connecting member; 240. a second elastic connecting piece; 250. a third limiting part; 300. a drive mechanism; 310. a magnet assembly; 311. a first magnet; 312. a second magnet; 320. a coil; 400. a limiting mechanism; 410. a first limit piece; 411. a second limiting part; 412. a sliding part; 413. a connecting portion; 420. an adjustment assembly; 421. a first adjustment member; 422. a second adjustment member; 500. a limiting groove.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings and are used merely for convenience in describing the utility model and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, 3 and 4, a focusing apparatus according to an embodiment includes: a mount assembly 100, a lens carrier 200, a drive mechanism 300, and a limit mechanism 400.

The mounting assembly 100 is provided with a mounting cavity having a mounting opening; the lens carrier 200 movably penetrates through the mounting cavity through the mounting opening, and the lens carrier 200 comprises a lens barrel 210 and a first limiting part 220 fixedly connected with the lens barrel 210; the driving mechanism 300 is configured to drive the lens carrier 200 to move along a preset direction; the limiting mechanism 400 includes a first limiting member 410 and an adjusting component 420 in transmission connection with the first limiting member 410, the first limiting member 410 includes a second limiting portion 411 opposite to the first limiting portion 220 along a predetermined direction, the second limiting portion 411 can abut against the first limiting portion 220 moving along the predetermined direction, and the adjusting component 420 is used for adjusting the position of the first limiting member 410, so that the second limiting portion 411 moves along the predetermined direction.

When the focusing device focuses, the driving mechanism 300 is operated to make the lens carrier 200 move along the preset direction by the driving force, thereby realizing the focusing function. When the first position-limiting portion 220 abuts against the second position-limiting portion 411, the lens carrier 200 is at the maximum focusing distance. When the range of the focusing distance needs to be reduced, the adjusting assembly 420 is manipulated to adjust the position of the first limiting member 410, so that the second limiting portion 411 moves along the preset direction and approaches the first limiting portion 220 at the initial position; when the range of the focusing distance needs to be increased, the adjusting assembly 420 is manipulated to adjust the position of the first limiting member 410, so that the second limiting portion 411 moves in a predetermined direction and is away from the first limiting portion 220 at the initial position. In this way, the adjustment assembly 420 adjusts the position of the first limiting member 410, so as to finely adjust the maximum focusing distance of the lens.

It should be noted that, in the lens carrier 200 at the initial position, the second limiting portion 411 moves along a preset direction, where the preset direction is a direction from the object to be shot to the main focus of the focusing device, and specifically, in fig. 1, the direction from the object to be shot to the main focus of the focusing device is downward; in the lens carrier 200, the second limiting portion 411 moves away from the initial position along a predetermined direction, where the predetermined direction is a direction from the main focus of the focusing device to the object to be photographed, and specifically, in fig. 1, upward is a direction from the main focus of the focusing device to the object to be photographed.

The initial position of the first position-limiting portion 220 refers to a position of the first position-limiting portion 220 when the focusing distance of the focusing device is zero.

As shown in fig. 1 and 3, in some embodiments, the mounting assembly 100 includes a base 110 and a housing 120 disposed on the base 110, the base 110 and the housing 120 cooperate to form a mounting cavity, and the mounting opening is opened on the housing 120. In this way, the lens carrier 200, the driving mechanism 300 and the limiting mechanism 400 can be provided with mounting surfaces by the cooperation of the housing 120 and the base 110.

As shown in fig. 3, specifically, the adjusting assembly 420 includes a first adjusting member 421 connected to the base 110 and a second adjusting member 422 in transmission connection with the first adjusting member 421, and the second adjusting member 422 is fixedly connected to the first limiting member 410; the first adjusting member 421 can drive the second adjusting member 422 and the first limiting member 410 to move together along a predetermined direction. When the focus distance needs to be reduced, the first adjusting element 421 is operated to drive the second adjusting element 422 to drive the first limiting element 410 to move downward, so that the second limiting portion 411 moves downward to be close to the first limiting portion 220 at the initial position; when the focus distance needs to be increased, the first adjusting element 421 is operated to drive the second adjusting element 422 to drive the first limiting element 410 to move upward together, so that the second limiting portion 411 moves upward and away from the first limiting portion 220 at the initial position. Thus, the position of the first limiting member 410 can be adjusted by operating the first adjusting member 421.

In this embodiment, the first adjusting member 421 is a screw, the second adjusting member 422 is a nut, and the nut is sleeved outside the screw. When the range of the focusing distance needs to be reduced, the screw rod is rotated to drive the nut and the first limiting member 410 to move downwards together, so that the second limiting portion 411 moves downwards to be close to the first limiting portion 220 at the initial position; when the range of the focusing distance needs to be increased, the nut is driven to move upward together with the first limiting member 410 by rotating the screw in the opposite direction, so that the second limiting portion 411 moves away from the first limiting portion 220 at the initial position. Thus, the position of the first limiting member 410 can be adjusted by applying a torque to the screw.

As shown in fig. 3 and fig. 4, specifically, the first limiting member 410 further includes a sliding portion 412 slidably sleeved outside the housing 120, and a connecting portion 413 for connecting the sliding portion 412 and the second limiting portion 411; the sliding portion 412 and the second limiting portion 411 are spaced and disposed opposite to each other along the radial direction of the lens barrel 210, and are fixedly connected to the second adjusting member 422. Specifically, the second limiting portion 411 is movably disposed through the mounting opening. When the position of the first position-limiting member 410 is adjusted, the first adjusting member 421 is operated to drive the second adjusting member 422 to drive the sliding portion 412 to slide upward or downward relative to the housing 120, so as to drive the second position-limiting portion 411 to move upward and away from the first position-limiting portion 220 at the initial position, or move downward and close to the first position-limiting portion 220 at the initial position. Meanwhile, when the sliding portion 412 slides downward, the connecting portion 413 can abut against the housing 120, so as to prevent the second position-limiting portion 411 from abutting against the first position-limiting portion 220 at the initial position when the second position-limiting portion 411 moves downward, and the second position-limiting portion 411 abuts against the first position-limiting portion 220 on the base 110, or the first position-limiting portion 220 is damaged. Thus, the sliding portion 412 is sleeved outside the housing 120, so that the first position-limiting member 410 can be more stably abutted against the first position-limiting portion 220.

As shown in fig. 1 and 4, in particular, the lens carrier 200 further includes a first elastic connector 230 and a second elastic connector 240 respectively disposed at two ends of the lens barrel 210, the first elastic connector 230 is further fixedly connected with the housing 120, and the second elastic connector 240 is further fixedly connected with the base 110; the first elastic connector 230 and the second elastic connector 240 cooperate to form a limiting structure for limiting the lens carrier 200 in the mounting cavity and being capable of displacing along a preset direction. When the lens carrier 200 is moved by the driving force of the driving mechanism 300, the first elastic link 230 and the second elastic link 240 are extended and accumulated, and when the driving force is stopped to be applied to the lens carrier 200, the lens carrier 200 is restored to the initial position by the elastic force of the first elastic link 230 and the second elastic link 240. In this way, in the case where the lens carrier 200 can move, the lens carrier 200 can also be restored to the initial position.

As shown in fig. 1, 3 and 4, in some embodiments, the driving mechanism 300 includes a magnet assembly 310 disposed in the mounting cavity and a coil 320 fixed outside the lens barrel 210, the magnet assembly 310 includes a first magnet 311 and a second magnet 312 disposed opposite and spaced from the first magnet 311, and the coil 320 is disposed between the first magnet 311 and the second magnet 312.

The above-described driving mechanism 300 moves the lens carrier 200 in a preset direction by the lorentz force. Specifically, the energized coil 320 is moved in the magnetic field generated by the magnet assembly 310 by the lorentz force along the predetermined direction, so as to drive the lens carrier 200 to move along the predetermined direction, thereby achieving focusing. Meanwhile, when the magnetic field is not changed, the direction of the lorentz force changes along with the change of the direction of the current, so that the direction of the current in the coil 320 is changed, and the coil 320 is subjected to the upward or downward lorentz force, so that the lens carrier 200 is driven to move upward or downward. In this way, the lens carrier 200 can be moved up and down by merely changing the direction of the current in the coil 320.

The polarity of the first magnet 311 near the coil 320 is the same as the polarity of the second magnet 312 near the coil 320. In this way, the lorentz forces on both sides of the coil 320 are guaranteed to be in the same direction.

As shown in fig. 4, in some embodiments, a limiting groove 500 is formed between the coil 320 and the outer wall of the lens barrel 210, and the second limiting portion 411 is movably inserted into the limiting groove 500. Specifically, in this embodiment, the first position-limiting portion 220 is a collar, the collar is fixedly sleeved outside the lens barrel 210, the coil 320 is sleeved outside the lens barrel 210 and is disposed on the collar, the coil 320 and the lens barrel 210 cooperate to form an annular position-limiting groove 500, a notch of the position-limiting groove 500 is disposed opposite to the collar, and the second position-limiting portion 411 is movably inserted into the position-limiting groove 500 through the notch. Thus, the coil 320 is directly located in the magnetic field generated by the magnet assembly 310, thereby preventing the second position-limiting portion 411 from weakening the magnetic field acting on the coil 320 when located between the coil 320 and the magnet assembly 310.

As shown in fig. 2, further, the lens carrier 200 further includes a third limiting portion 250 disposed on the outer wall of the lens barrel 210, the third limiting portion 250 is in limiting fit with the second limiting portion 411, and the third limiting portion 250 is used for abutting against the second limiting portion 411 to prevent the lens carrier 200 from rotating around the axis of the lens barrel 210. When the lens carrier 200 is rotated around the axis of the lens barrel 210 by an external force, the second position-limiting portion 411 abuts against the third position-limiting portion 250, thereby preventing the lens carrier 200 from rotating.

An embodiment relates to a lens, which includes the focusing device as described above and a lens assembly fixedly connected to the lens barrel 210. Specifically, the lens barrel 210 is provided with an internal thread, the lens assembly is provided with an external thread, and the lens barrel 210 is in threaded connection with the lens assembly. In this manner, the lens assembly is more stable in connection with the lens barrel 210. While also allowing fine adjustment of the maximum focus distance of the lens assembly.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A focusing device, comprising:

the mounting assembly is provided with a mounting cavity with a mounting opening;

the lens carrier is movably arranged in the mounting cavity in a penetrating manner through the mounting opening and comprises a lens barrel and a first limiting part arranged on the outer wall of the lens barrel;

the driving mechanism is used for driving the lens carrier to move along a preset direction; and

the limiting mechanism comprises a first limiting part and an adjusting component in transmission connection with the first limiting part, the first limiting part comprises a second limiting part which is arranged opposite to the preset direction along the first limiting part, the second limiting part can be abutted against the first limiting part moving along the preset direction, and the adjusting component is used for adjusting the position of the first limiting part so that the second limiting part moves along the preset direction.

2. The focusing device of claim 1, wherein the mounting assembly comprises a base and a housing disposed on the base, the base and the housing cooperate to form the mounting cavity, and the mounting opening is opened on the housing.

3. The focusing device of claim 2, wherein the adjusting assembly comprises a first adjusting member connected to the base and a second adjusting member in transmission connection with the first adjusting member, and the second adjusting member is fixedly connected to the first limiting member; the first adjusting piece can drive the second adjusting piece and the first limiting piece to move together along the preset direction.

4. The focusing device of claim 3, wherein the first adjusting member is a threaded rod, and the second adjusting member is a nut, and the nut is sleeved on the threaded rod.

5. The focusing device of claim 3, wherein the first position-limiting member further comprises a sliding portion slidably disposed outside the housing, and a connecting portion for connecting the sliding portion and the second position-limiting portion; the sliding part and the second limiting part are arranged along the radial direction of the lens barrel at intervals and oppositely and are fixedly connected with the second adjusting piece.

6. The focusing device of claim 2, wherein the lens carrier further comprises a first elastic connecting member and a second elastic connecting member respectively disposed at two ends of the lens barrel, the first elastic connecting member is further fixedly connected with the housing, and the second elastic connecting member is further fixedly connected with the base; the first elastic connecting piece and the second elastic connecting piece are matched to form a limiting structure which is used for limiting the lens carrier in the installation cavity and can move along a preset direction.

7. The focusing device as claimed in claim 1, wherein the driving mechanism comprises a magnet assembly disposed in the mounting cavity and a coil fixedly secured outside the lens barrel, the magnet assembly comprises a first magnet and a second magnet spaced apart from and opposing the first magnet, and the coil is disposed between the first magnet and the second magnet.

8. The focusing device of claim 7, wherein a limiting groove is formed between the coil and the outer wall of the lens barrel, and the first limiting portion is movably inserted into the limiting groove.

9. The focusing device as claimed in claim 6, wherein the lens carrier further comprises a third position-limiting portion disposed on the outer wall of the lens barrel, the third position-limiting portion is in position-limiting engagement with the second position-limiting portion, and the third position-limiting portion is configured to prevent the lens carrier from rotating around the axis of the lens barrel.

10. A lens barrel characterized by comprising:

the focusing device of any one of claims 1 to 9; and

and the lens assembly is fixedly connected with the lens barrel.

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