CN220650966U

CN220650966U - Lens driving device

Info

Publication number: CN220650966U
Application number: CN202322349627.5U
Authority: CN
Inventors: 鲍和平; 彭坤; 林聪�; 刘富泉; 吕新科
Original assignee: Henan Hozel Electronics Co Ltd
Current assignee: Henan Hozel Electronics Co Ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-03-22
Anticipated expiration: 2033-08-30

Abstract

The utility model discloses a lens driving device, which comprises a carrier, a base, a frame and a driving mechanism, wherein the frame is arranged on the base, the carrier is arranged in the frame and is used for installing a lens, balls are arranged between the frame and the base and support the frame on the base through the balls, a plurality of first ball mounting grooves are formed in the bottom of the frame, a plurality of second ball mounting grooves are formed in the upper surface of the base, the first ball mounting grooves are mutually matched with the second ball mounting grooves and are used for installing balls, and when the driving mechanism drives the frame to move relative to the base, the balls are provided with two contact points with the first ball mounting grooves, and the balls are provided with one contact point with the second ball mounting grooves. According to the lens driving device, the frame is supported on the base through the balls, and the friction force of the balls in the movement process is smaller and the service life of the balls is prolonged through the ingenious design of the first ball mounting groove and the second ball mounting groove.

Description

Lens driving device

Technical Field

The present utility model relates to the field of optical driving, and in particular, to a lens driving device.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides more options for the user.

Some electronic devices with photographing or video recording function are provided with a lens driving device to drive an Optical component such as a lens to move, so as to achieve the functions of auto focus (auto focus) and Optical vibration prevention (Optical ImageStabilization, OIS). The light can be imaged through the optical assembly onto the photosensitive assembly.

The existing lens driving apparatus generally includes an OIS coil group for preventing lens shake, a magnet group, a zoom coil, and a carrier for mounting a lens. Under the action of the OIS coil group and the magnet group, the carrier moves along the X-axis and Y-axis directions together with the lens, and under the action of the zoom coil and the magnet group, the carrier moves along the Z-axis directions together with the lens, so that the triaxial movement operation of the lens is realized. However, when the carrier moves in the X-axis and Y-axis directions, the conventional lens driving device is difficult to move due to a large friction force with the base, and even a phenomenon of shake during movement or difficult movement occurs, which seriously affects the triaxial movement of the lens.

Disclosure of Invention

The present utility model is directed to a lens driving device for solving the above-mentioned problems of the prior art.

In order to solve the above-described problems, according to one aspect of the present utility model, there is provided a lens driving device including a carrier, a base, a frame mounted on the base, the carrier being mounted in the frame for mounting a lens, balls being provided between the frame and the base and supporting the frame on the base through the balls, wherein a plurality of first ball mounting grooves are provided at a bottom of the frame, a plurality of second ball mounting grooves are provided at an upper surface of the base, the first ball mounting grooves and the second ball mounting grooves are engaged with each other and for mounting balls, and the driving mechanism drives the frame to move relative to the base, the balls having two contact points with the first ball mounting grooves, and the balls having one contact point with the second ball mounting grooves.

In one embodiment, a ball metal sheet is disposed in the second ball mounting groove.

In one embodiment, a first layer of built-in metal sheet of the base and a second layer of built-in metal sheet of the base are arranged in the base, wherein the first layer of built-in metal sheet of the base is connected with an external circuit, and the second layer of built-in metal sheet of the base is used for reinforcing the structural strength of the base.

In one embodiment, the second layer of base built-in metal sheet is disposed at four corners of the base.

In one embodiment, the driving mechanism comprises a magnet fixedly arranged on the side part of the frame and a coil fixedly arranged on the base, wherein the coil is matched with the magnet and drives the frame and the carrier to move relative to the base when the magnet is electrified.

In one embodiment, the lens driving device further includes an upper reed movably connecting the upper surface of the carrier with the upper surface of the frame, and a lower reed movably connecting the lower surface of the carrier with the lower surface of the frame.

In one embodiment, the frame is provided with a built-in metal sheet.

In one embodiment, the lens driving device further comprises a housing, wherein the housing is matched with the base and forms a cavity, and the frame, the carrier and the driving mechanism are arranged in the cavity.

In one embodiment, the four corners of the base are provided with support columns extending towards the direction of the shell, the two corners on two diagonals of the metal sheet arranged in the first layer of base are provided with metal protruding parts, the metal protruding parts are arranged in the support columns on one diagonal of the base, the metal protruding parts are electrically connected with the upper reed, and the upper reed is electrically connected with the focusing coil on the carrier.

In one embodiment, the four corners of the carrier are provided with damping gel to cushion the strength of the movement of the carrier relative to the frame.

In one embodiment, two position sensors are further provided on the base, the two position sensors being disposed at two adjacent sides of the base to detect displacement of the frame.

According to the lens driving device, the frame is supported on the base through the balls, and the friction force of the balls in the movement process is smaller and the service life of the balls is prolonged through the ingenious design of the first ball mounting groove and the second ball mounting groove.

Drawings

Fig. 1 is an exploded perspective view of a lens driving apparatus according to an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of a lens driving apparatus according to an embodiment of the present utility model.

Fig. 3 is an exploded perspective view of a base of one embodiment of the present utility model.

Fig. 4 is a top view of a lens driving apparatus according to an embodiment of the present utility model.

Fig. 5 is a bottom view of a lens driving apparatus according to an embodiment of the present utility model.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings, so that the objects, features and advantages of the present utility model will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

In the following description, for the purposes of explanation of various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of the specific details. In other instances, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present utility model, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

The present utility model relates generally to a lens driving apparatus that can be used in a terminal such as a mobile phone, a tablet computer, a notebook computer, etc., which is combined with a lens for realizing functions such as photographing, video recording, etc.

Fig. 1 is an exploded perspective view of a lens driving apparatus 100 according to an embodiment of the present utility model, and fig. 2 is a cross-sectional view of the lens driving apparatus according to an embodiment of the present utility model. Referring to fig. 1-2, in one embodiment, the lens driving apparatus of the present utility model includes a carrier 10, a base 20, a frame 30, and a driving mechanism, the frame 30 is mounted on the base 20, the carrier 10 is mounted in the frame 30 and is used for mounting a lens (not shown), balls 40 are provided between the frame 30 and the base 20, and the frame is supported on the base by the balls 40. The bottom of the frame 30 is provided with a plurality of first ball mounting grooves 31, the upper surface of the base 20 is provided with a plurality of second ball mounting grooves 21, and the first ball mounting grooves 31 are matched with the second ball mounting grooves 21 and are used for mounting the balls 40. The first and second mounting grooves may be provided as rectangular grooves, and the length and width of the first mounting groove 31 may be slightly larger than the diameter of the ball, i.e. just enough to fit the ball and allow a certain movement of the ball therein, and the length and width of the second mounting groove may be much larger than the diameter of the ball, and when the driving mechanism driving frame moves relative to the base, the ball has two contact points with the first ball mounting groove 31, i.e. the contact point of the bottom of the first ball mounting groove and the side contact point, and the ball has only one contact point with the second ball mounting groove, i.e. the contact point of the bottom of the second ball mounting groove. Since the contact points are subjected to large frictional force, the balls roll due to the difference in frictional force between the upper and lower hemispheres of the balls.

Optionally, the side walls of the first ball groove and the second ball groove are arranged in an inclined form, namely, the side walls form an included angle of more than 90 degrees with the bottom surface of the groove, so that the contact area of the balls and the ball grooves in the rolling process is reduced.

It can be seen that the lens driving device of the utility model supports the frame on the base through the balls, and the friction force of the balls in the moving process is smaller and the service life of the balls is prolonged through the ingenious design of the first ball mounting groove and the second ball mounting groove.

Optionally, a ball metal sheet is provided in the second ball mounting groove 21 of the base 20 to increase the strength of the second ball mounting groove 21, preventing the balls from being worn out when moving in the second ball mounting groove for a long time.

Fig. 3 is an exploded perspective view of a base of one embodiment of the present utility model. As shown in fig. 3, in one embodiment, a first layer of built-in metal sheet 22 and a second layer of built-in metal sheet 23 are provided in the base 20, the first layer of built-in metal sheet 22 is used for connecting an external circuit and transmitting current to the carrier and the coil on the base, and the second layer of built-in metal sheet is used for reinforcing the overall structural strength of the base.

Alternatively, the second-layer chassis-in metal sheet 23 includes four separate metal sheets and is disposed at four corners of the chassis 20, respectively. Because the frame is mainly supported on the base through the balls, and the balls are mainly arranged at the four corners of the base, the four corners of the base are mainly positions for bearing pressure, and the technical effect of improving the overall strength of the base can be achieved by arranging the second base built-in metal sheets at the four corners, so that the service life of the base is prolonged.

In one embodiment, the driving mechanism is an electromagnetic driving mechanism and comprises magnets 70 fixedly arranged on four sides of the frame 30 and anti-shake coils fixedly arranged on the base 20, wherein the anti-shake coils are positioned right below the magnets and are matched with the magnets, and when the anti-shake coils are electrified, the driving frame drives the carrier to move relative to the base, so that the optical anti-shake function is realized.

In one embodiment, the lens driving apparatus 100 further includes an upper reed 50 movably connecting the upper surface of the carrier 10 with the upper surface of the frame 30, and a lower reed 60 movably connecting the lower surface of the carrier 10 with the lower surface of the frame 30. The outer side of the carrier 10 is fixedly provided with a focusing coil which is arranged on the inner side of the magnet on the frame and matched with the magnet, so that the carrier is driven to move along the optical axis direction when the power is on to realize the optical zoom function.

Optionally, a metal sheet 80 with built-in frame is disposed in the frame 20, and the strength of the frame 20 is reinforced by the metal sheet 80 with built-in frame, so that the overall strength of the lens driving device is improved, and the service life of the lens driving device is prolonged.

In one embodiment, the lens driving apparatus 100 further includes a housing 90, wherein the housing 90 cooperates with the base 20 to form a chamber, and the frame 30, the carrier 10, the driving mechanism, etc. are disposed in the chamber.

Optionally, four corners of the base 20 are provided with four support columns 24 extending towards the direction of the shell, two corners on one diagonal of the metal sheet 22 embedded in the first layer of base are provided with metal protruding parts 221, the metal protruding parts 221 are arranged in the support columns 24 on one diagonal of the base 20 and protrude out of the upper end faces of the support columns 24 and are electrically connected with the upper reed 50, the upper reed 50 is electrically connected with the focusing coil on the carrier, and thus external current is transmitted to the upper reed through the metal protruding parts of the metal sheet 22 embedded in the base and is transmitted to the focusing coil on the carrier through the upper reed.

Fig. 4 is a top view of a lens driving apparatus according to an embodiment of the present utility model, in which a housing is not mounted, and four corners of a carrier 10 are provided with damping gel to buffer the strength of movement of the carrier with respect to a frame, as shown in fig. 4.

Fig. 5 is a bottom view of a lens driving apparatus according to an embodiment of the present utility model, and as shown in fig. 5, optionally, two position sensors 16 are further provided on the base 20, and the two position sensors 16 are disposed at two adjacent sides of the base to detect displacement of the frame. As can be seen in fig. 5, alternatively, four portions of the lower surface of the chassis 20 are provided with notches, and the second-layer chassis-in metal sheet is disposed within the notches and has a portion exposed to the outside, i.e., the second-layer chassis-in metal sheet is visible from the outside.

The utility model can be widely applied to various electronic products due to novel conception and creative design, thereby having great commercial application value and wide commercial application prospect.

While the preferred embodiments of the present utility model have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the utility model. Such equivalents are also intended to fall within the scope of the claims appended hereto.

Claims

1. The utility model provides a lens drive arrangement, includes carrier, base, frame and actuating mechanism, the frame install in on the base, the carrier install in the frame and be used for installing the camera lens, its characterized in that, the frame with be equipped with the ball between the base and pass through the ball will the frame support on the base, wherein, the bottom of frame is equipped with a plurality of first ball mounting grooves, the upper surface of base is equipped with a plurality of second ball mounting grooves, first ball mounting groove with second ball mounting groove mutually support and are used for installing the ball, actuating mechanism drives when the frame moves for the base, the ball with first ball mounting groove has two contact points, and the ball with second ball mounting groove has a contact point.

2. The lens driving apparatus of claim 1, wherein a ball metal sheet is provided in the second ball mounting groove.

3. The lens driving apparatus according to claim 1, wherein a first-layer chassis-in metal sheet and a second-layer chassis-in metal sheet are provided in the chassis, wherein the first-layer chassis-in metal sheet is connected with an external circuit, and the second-layer chassis-in metal sheet is used for reinforcing structural strength of the chassis.

4. A lens driving apparatus according to claim 3, wherein the second-layer chassis-in metal sheet is provided at four corners of the chassis.

5. The lens driving apparatus according to claim 1, wherein the driving mechanism includes a magnet fixedly provided at a side portion of the frame and a coil fixedly provided on the base, the coil being engaged with the magnet and driving the frame to move relative to the base when energized.

6. A lens driving apparatus according to claim 3, further comprising an upper reed movably connecting an upper surface of the carrier with an upper surface of the frame, and a lower reed movably connecting a lower surface of the carrier with a lower surface of the frame.

7. The lens driving apparatus according to claim 6, wherein a frame built-in metal sheet is provided in the frame.

8. The lens driving apparatus according to claim 7, further comprising a housing cooperating with the base and forming a chamber, the frame, carrier, and driving mechanism being disposed within the chamber.

9. The lens driving apparatus according to claim 8, wherein four corners of the chassis are provided with support posts extending toward the direction of the housing, two corners of two diagonal lines of the first-layer chassis-in metal sheet are provided with metal projections provided in the support posts on one of the diagonal lines of the chassis, the metal projections are electrically connected with the upper reed, and the upper reed is electrically connected with the focusing coil on the carrier.

10. The lens driving apparatus according to claim 1, wherein four corners of the carrier are provided with damping gel to buffer the intensity of movement of the carrier relative to the frame.