CN114810888B

CN114810888B - 3D spring structure

Info

Publication number: CN114810888B
Application number: CN202210599779.8A
Authority: CN
Inventors: 王林; 吴雨涵
Original assignee: Chengdu Eason Jizheng Technology Co ltd
Current assignee: Chengdu Eason Jizheng Technology Co ltd
Priority date: 2022-05-30
Filing date: 2022-05-30
Publication date: 2024-06-04
Anticipated expiration: 2042-05-30
Also published as: CN114810888A

Abstract

The application relates to the field of optical imaging equipment, and discloses a 3D spring structure, which comprises the following components: the AF spring comprises an outer frame, an inner frame used for connecting the optical element and a connecting part with two ends fixedly connected with the outer frame and the inner frame respectively and elasticity; the OI S spring is perpendicular to the surface of the AF spring and is fixedly inserted on the connecting part. Compared with a bending type 3D structure, the spliced spring structure can enable the spring to withstand high impact and high-frequency impact, and the reliability and the production efficiency of products are improved.

Description

3D spring structure

Technical Field

The application relates to the field of optical imaging equipment, in particular to a 3D spring structure.

Background

The OIS motor is one of VCM motors, and is an important component for camera auto-focusing and optical anti-shake. The existing OIS optical anti-shake motor mainly comprises a ball type structure, a suspension type structure, an SMA structure, a 3D spring structure and the like. The 3D spring type optical anti-shake device has the advantages that the 3D spring type optical anti-shake device is the simplest in structure, the 3D spring is an important carrier for carrying optical elements in a motor to perform anti-shake motion or focusing motion, the OIS optical anti-shake function can be achieved under the existing automatic assembly process, and good reliability is achieved. But the 3D spring structural formula is formed by mechanical extrusion bending, so that the ordering and distribution of the atomic structures in the material are changed to a certain extent, the stress at the bending position of the formed 3D spring is concentrated, the overall strength is damaged to a certain extent than that of the raw material, and under the increasingly severe RA requirement, the risks such as variation exist at the bending position.

Disclosure of Invention

In order to solve the problem that strength of a 3D spring is damaged after bending in the prior art, the application provides an assembled 3D spring structure.

In order to achieve the above purpose, the technical scheme adopted by the application is as follows:

A 3D spring structure, comprising: the AF spring comprises an outer frame, an inner frame used for connecting the optical element and a connecting part with two ends fixedly connected with the outer frame and the inner frame respectively and elasticity; the OIS spring is perpendicular to the surface of the AF spring and is inserted and fixed on the connecting part.

The 3D spring is a part used in cooperation with a carrier on which the optical element is mounted, and is used for providing an elastic restoring force after the optical element moves, and its structure can be divided into an AF spring and an OIs spring according to functions, wherein the AF spring is used for assisting the optical element to complete zooming action, the OIs spring assists the optical element to perform optical anti-shake movement, and the two moving directions are different, namely, the optical element matched with the AF spring performs linear movement or rotation along a Z-axis (axial direction), and the optical element matched with the OIs spring moves on a plane (i.e. radial direction) formed by an X-axis and a Y-axis. The existing 3D spring is produced by a bending process, and a complete raw material is cut and directionally bent to form a three-dimensional 3D structure, so that an AF spring and OIS spring integrated structure is formed. Therefore, in the use process of the existing spring, stress at the bending position is concentrated, and the influence on the atomic structure ordering and distribution in the material possibly existing during bending is combined, so that the spring is easy to fatigue fracture, and the service life and the precision are influenced.

In this scheme, adopt and peg graft the structure that forms 3D spring with OIS spring fixed to AF spring, compare in current integral type structure, do not bend, can show the intensity that improves AF spring and OIS spring junction, RA experiment has very big improvement effect for 3D spring can withstand high impact, high frequency striking, thereby guaranteed the reliability of product, promoted product quality. Meanwhile, in the production process of the spring, the spliced and fixed connection has higher production efficiency compared with a bending process, and can meet the modern mass production requirement.

Further, the OIS spring comprises a plurality of groups of elastic units which are arranged on the AF spring in a dispersing way, and each group of elastic units comprises two elastic sheets which are distributed in a right angle shape. It can be known that the connection part of the AF spring provides elastic restoring force in the Z-axis direction by utilizing self elasticity, and two mutually perpendicular elastic sheets of the OIS spring are respectively used for providing elastic restoring force in the X-axis direction and the Y-axis direction, and the two elastic sheets and the connection part are in a mutually perpendicular relation. In contrast, even if the elastic unit of the integrated type provides an elastic restoring force in only one direction, there is a stress in each direction inside the elastic unit, so that the elastic unit is easily fatigued. Therefore, the elastic unit consists of two independent elastic sheets, and the elastic restoring force of one direction is provided by one elastic sheet, so that the integral fatigue of the elastic unit caused by the relative movement of the two elastic sheets can be effectively avoided, and the stability and the service life of the OIS spring are improved.

Further, the connecting portion comprises four first cantilevers which are symmetrical in pairs and two second cantilevers which are connected with the first cantilevers and the inner frame, one end of each first cantilever is fixedly connected with the outer frame, and the other ends of two adjacent first cantilevers are fixedly connected with the second cantilevers.

Further, the AF spring further comprises spring electricity-running parts which are arranged in one-to-one correspondence with the first cantilevers, one end of each spring electricity-running part is fixedly connected to the joint between the first cantilevers and the outer frame, and the other end of each spring electricity-running part is connected with the outer frame.

Further, the elastic units are arranged in one-to-one correspondence with the spring charging parts, a first connecting hole for connecting a corner block is formed in the bent part of the middle of the spring charging parts, slots matched with one ends of the elastic sheets are formed in the surface of the corner block, and the other ends of the two elastic sheets are connected with the end parts of the spring charging parts respectively.

Further, two end points of the spring walking part are respectively connected with the middle point to form a right-angle line segment, and a multi-section curve is formed between the end points and the middle point.

Further, two ends of the spring electricity feeding part are respectively provided with a second connecting hole and a third connecting hole which are used for connecting an external circuit.

Further, a fourth connecting hole for connecting the carrier or the optical element is formed in the second cantilever at a position where the two first cantilevers are connected.

The beneficial effects of the application are as follows: compared with a bending type 3D structure, the spliced type spring structure can be subjected to high impact and high-frequency impact, and reliability and production efficiency of products are improved.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application and that other drawings may be obtained from them without inventive effort for a person skilled in the art.

FIG. 1 is a top view of the present application;

FIG. 2 is a schematic perspective view of the present application;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

FIG. 4 is a schematic perspective view of another angle of the present application;

FIG. 5 is a schematic view of an exploded construction of the spring of the present application;

FIG. 6 is an enlarged partial schematic view at B in FIG. 5;

FIG. 7 is a schematic view of the corner block structure of the present application.

In the figure: 1-an outer frame; 2-inner frame; 3-an elastic unit; 4-a spring power-off part; 5-a first cantilever; 6-corner blocks; 601-a boss; 602-slots; 7-a second cantilever; 8-a first connection hole; 9-a second connection hole; 10-a third connecting hole; 11-fourth connecting holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which a product of the application is conventionally put in use, it is merely for convenience of describing the present application and simplifying the description, and it is not indicated or implied that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like in the description of the present application, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.

Furthermore, the terms "horizontal," "vertical," and the like in the description of the present application, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Example 1:

A 3D spring structure as shown in fig. 1, comprising: the AF spring comprises an outer frame 1, an inner frame 2 used for connecting optical elements, and a connecting part with two ends fixedly connected with the outer frame 1 and the inner frame 2 respectively and elasticity; the OI S spring is perpendicular to the surface of the AF spring and is fixedly inserted on the connecting part.

The working principle is as follows:

In the scheme, the AF spring is used for assisting the optical element to complete zooming action, the OIS spring is used for assisting the optical element to conduct optical anti-shake movement, the moving directions of the AF spring and the OIS spring are different, namely, the optical element matched with the AF spring conducts linear movement or rotation along the Z axis (axial direction), and the optical element matched with the OIS spring conducts (radial) movement on a plane formed by the X axis and the Y axis. The outer frame 1 is a structure that an AF spring is connected with other fixing components (such as a shell) in the complete camera module, so that stability of the AF spring in the complete camera module is maintained, the inner frame 2 is connected with a carrier (such as a PCB) provided with an optical element, the connecting piece is a source for providing elastic restoring force, and the elastic deformation capability of the connecting piece enables the inner frame 2 to move relative to the outer frame 1.

Example 2:

in this embodiment, on the basis of embodiment 1, the structure of the OIS spring is further optimized and defined.

As shown in fig. 2 and 3, the OIS spring includes a plurality of groups of elastic units 3 that are dispersedly mounted on the AF spring, and each group of elastic units 3 includes two elastic sheets distributed in a right angle shape. In this embodiment, the specific structure of the OIS spring is limited, two independent elastic sheets are used to provide elastic forces in two directions on a radial plane for the optical element, so that multiple groups of elastic units 3 cooperate to provide elastic forces in all directions on the radial plane, and the OIS spring is known to provide elastic restoring force for radial movement of the optical element, so that in order to ensure that movement of the optical element in all directions on the radial plane can be subjected to elastic restoring force, at least two groups of elastic units 3 are included, and as shown in fig. 2, an example of distribution of four groups of elastic units 3 in the OIS spring is provided, and the four groups of elastic units 3 are also distributed at four corners corresponding to the square AF spring frame 1.

Example 3:

The present embodiment further optimizes and defines the structure of the AF spring on the basis of embodiment 2.

As shown in fig. 3 and fig. 4, the connecting portion includes four first cantilevers 5 that are symmetrical in pairs, and two second cantilevers 7 that connect the first cantilevers 5 and the inner frame 2, one end of each first cantilever 5 is fixedly connected with the outer frame 1, and the other ends of two adjacent first cantilevers 5 are fixedly connected with the second cantilevers 7. The connecting part in this embodiment is formed by two parts, and the first cantilever 5 connected with the outer frame 1 and the second cantilever 7 connected with the inner frame 2 are connected with each other to form a complete connecting part, where the first cantilever 5 is mainly used for providing elastic restoring force, and the second cantilever 7 is used for reinforcing the overall structural strength of the connecting part on the basis of ensuring the elasticity of the connecting part. It should be noted that, as shown in the figure, in order to ensure the movable space of the optical element on the radial plane, the distance between the inner frame 2 and the outer frame 1 is greater than the distance that the first cantilever 5 and the second cantilever 7 can be connected, so that a plurality of connection structures for connecting the first cantilever 5 are extended on the outer frame 1 towards the inner frame 2, and a plurality of connection structures for connecting the second cantilever 7 are extended on the inner frame 2 towards the outer frame 1, and the two connection structures need to maintain the rigidity consistent with the outer frame 1 and the inner frame 2 respectively.

In this embodiment, it is preferable to optimize the connection structure of the spring and the external circuit in the present application. The AF spring further comprises spring electricity-passing portions 4 which are arranged in one-to-one correspondence with the first cantilevers 5, one end of each spring electricity-passing portion 4 is fixedly connected to the joint between the first cantilevers 5 and the outer frame 1, and the other end of each spring electricity-passing portion is connected with the outer frame 1. As shown in the figure, the whole shape of the first cantilever 5 is bent, the spring charging part 4 is arranged on the outer side of the first cantilever 5, the whole shape is bent similarly to the first cantilever 5, the spring charging part 4 is combined with one end part of the first cantilever 5 and is connected with the outer frame 1, and the AF spring part can be connected with a carrier and is communicated with an AF coil through a spring conductive part to ensure AF electrification.

Example 4:

This embodiment further optimizes the connection between OIS springs and AF springs based on embodiment 3.

As shown in fig. 6, the elastic units 3 are arranged in one-to-one correspondence with the spring charging parts 4, a first connecting hole 8 for connecting the corner block 6 is formed in the middle bending part of the spring charging part 4, a slot 602 matched with one end of each elastic piece is formed in the surface of the corner block 6, and the other ends of the two elastic pieces are respectively connected with the end parts of the spring charging parts 4.

In this embodiment, the corner block 6 is arranged to complete connection between the OIS spring and the AF spring, specifically, the bottom of the corner block 6 is provided with a protruding structure matched with the first connecting hole 8, so that the corner block is installed at the middle bending part of the spring feeding part 4 and fixed by dispensing, and the first connecting hole 8 is favorable for quick positioning and installation of the corner block 6. The included angle of the side surface of the corner block 6 is matched with the bending angle of the spring charging part 4, one end of the elastic sheet is connected with the end part of the spring charging part 4, and the other end of the elastic sheet is inserted into the corner block 6 to complete the installation of the elastic sheet.

It should be noted that, in this embodiment, the corner block 6 is an insulating injection molding piece, the surface of the corner block 6 shown in fig. 7 is provided with a boss 601, a slot 602 for matching with an elastic sheet is further recessed from the surface, and in the production process, the elastic unit 3 is inserted into the corner block 6 from top to bottom, and the side surface of the boss 601 is attached to the elastic sheet. In addition, the slot 602 on the corner block 6 for mating with the elastic unit 3 may also extend inward from the side, and the elastic unit 3 is inserted into the corner block 6 from the side of the corner block 6. In addition, the slot 602 on the corner block 6 is shown as a right angle, and the two independent elastic units 3 are still not contacted with each other after being inserted into the corner block 6, so that a part of the slot 602 is left. Although the elastic unit 3 and the corner block 6 are fixed by the adhesive in actual production, in order to avoid errors when the elastic unit 3 is inserted into the jig, the slot 602 on the corner block 6 may be configured to be completely adapted to the elastic unit 3 without leaving any gap.

It should be noted that, although the arrangement of the corner block 6 can enhance the stability of connection by increasing the contact area between the elastic sheet and the installation position, the elastic sheet also needs to maintain a certain elasticity, and when testing various parameters of the spring, compared with the bending spring, the spring K value should not change greatly, and the maximum stress that can be borne should be significantly improved.

Example 5:

In this embodiment, in order to increase the structural strength of the spring charging portion 4 on the basis of embodiment 3, as shown in fig. 6, two end points of the spring charging portion 4 form right-angle line segments with a midpoint, and a multi-segment curve is formed between the end points and the midpoint, and the length and the overall width of the spring charging portion 4 are increased by bending the spring charging portion 4, so that the situation of stress fracture is avoided.

Example 6:

the present embodiment further defines the structure of the AF spring on the basis of embodiment 2.

As shown in fig. 6, the two ends of the spring charging part 4 are respectively provided with a second connecting hole 9 and a third connecting hole 10 for connecting an external circuit. In order to enable AF to be electrified, the spring electricity passing part 4 is connected with the conducting wire, and the second connecting hole 9 and the third connecting hole 10 are arranged to not only provide fixed accurate connecting positions, improve processing efficiency, but also facilitate welding and electrifying. Furthermore, as shown in fig. 3, the second suspension arm 7 is provided with a fourth connection hole 11 for connecting the carrier or the optical element at a position where the two first suspension arms 5 are connected.

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

Claims

1. A 3D spring structure, characterized in that: comprising the following steps:

the AF spring comprises an outer frame (1) and an inner frame (2) for connecting optical elements, and further comprises a connecting part, wherein two ends of the connecting part are fixedly connected with the outer frame (1) and the inner frame (2) respectively and have elasticity;

the OIS spring is perpendicular to the surface of the AF spring and is fixedly inserted on the connecting part;

The OIS spring comprises a plurality of groups of elastic units (3) which are arranged on the AF spring in a dispersing way, wherein each group of elastic units (3) comprises two elastic sheets which are distributed in a right angle shape;

The connecting portion comprises four first cantilevers (5) which are symmetrical in pairs and two second cantilevers (7) which are connected with the first cantilevers (5) and the inner frame (2), one end of each first cantilever (5) is fixedly connected with the outer frame (1), and the other ends of two adjacent first cantilevers (5) are fixedly connected with the second cantilevers (7).

2. A 3D spring structure according to claim 1, characterized in that: the AF spring further comprises spring electricity-passing parts (4) which are arranged in one-to-one correspondence with the first cantilevers (5), one end of each spring electricity-passing part (4) is fixedly connected to the joint between the first cantilevers (5) and the outer frame (1), and the other end of each spring electricity-passing part is connected with the outer frame (1).

3. A 3D spring structure according to claim 2, characterized in that: the elastic unit (3) and the spring electricity part (4) are arranged in a one-to-one correspondence manner, a first connecting hole (8) for connecting the corner block (6) is formed in the middle bending part of the spring electricity part (4), a slot (602) matched with one end of the elastic piece is formed in the surface of the corner block (6), and the other ends of the two elastic pieces are respectively connected with the end parts of the spring electricity part (4).

4. A 3D spring structure according to claim 2, characterized in that: two end points of the spring electricity feeding part (4) are respectively connected with the middle point to form right-angle line segments, and a plurality of sections of curves are arranged between the end points and the middle point.

5. A 3D spring structure according to claim 2, characterized in that: two ends of the spring electricity feeding part (4) are respectively provided with a second connecting hole (9) and a third connecting hole (10) which are used for connecting an external circuit.

6. A 3D spring structure according to claim 1, characterized in that: and a fourth connecting hole (11) for connecting the carrier or the optical element is arranged at the position of the second cantilever (7) for connecting the two first cantilevers (5).