阅读说明：本技术 弹片设计方法及弹片、sma组件、镜头模组和电子设备 (Shrapnel design method, shrapnel, SMA assembly, lens module and electronic equipment ) 是由 段然 万海波 梅倩 吕大林 李邓峰 于 2020-05-09 设计创作，主要内容包括：本申请提供了一种弹片设计方法及弹片、SMA组件、镜头模组和电子设备。该SMA组件包括：固定件、弹片和形状记忆合金SMA线,所述SMA线的一端与所述固定件相连接,另一端与所述弹片相连接；所述弹片包括弹片主体和至少一个弹片悬臂；其中,所述弹片悬臂与所述弹片主体相连接,并沿所述弹片主体的外缘延伸；所述弹片悬臂在延伸部分的预定位置与所述固定件相连接；所述至少一个弹片悬臂呈轴对称或90°旋转对称。上述技术方案能够减小或消除SMA组件中的弹片的机械串扰,提高光学防抖性能。(The application provides a shrapnel design method, a shrapnel, an SMA assembly, a lens module and an electronic device. The SMA assembly includes: the shape memory alloy SMA wire comprises a fixing piece, an elastic piece and a shape memory alloy SMA wire, wherein one end of the SMA wire is connected with the fixing piece, and the other end of the SMA wire is connected with the elastic piece; the elastic sheet comprises an elastic sheet main body and at least one elastic sheet cantilever; the elastic sheet cantilever is connected with the elastic sheet main body and extends along the outer edge of the elastic sheet main body; the elastic sheet cantilever is connected with the fixed piece at a preset position of the extending part; the at least one elastic sheet cantilever is axisymmetric or 90-degree rotational symmetric. By the technical scheme, mechanical crosstalk of the elastic sheet in the SMA assembly can be reduced or eliminated, and the optical anti-shake performance is improved.)

A shape memory alloy SMA assembly, comprising: a fixing piece, a spring piece and a shape memory alloy SMA wire,

one end of the SMA wire is connected with the fixing piece, and the other end of the SMA wire is connected with the elastic sheet;

the elastic sheet comprises an elastic sheet main body and at least one elastic sheet cantilever;

the elastic sheet cantilever is connected with the elastic sheet main body and extends along the outer edge of the elastic sheet main body;

the elastic sheet cantilever is connected with the fixed piece at a preset position of the extending part;

the at least one elastic sheet cantilever is axisymmetric or 90-degree rotational symmetric.

The SMA assembly of claim 1, wherein a difference between a value of K of the spring in a first direction and a value of K in a second direction, perpendicular to each other, is less than a predetermined threshold, wherein the value of K is a ratio of a magnitude of an applied force to which the spring is subjected to a magnitude of displacement of the spring in the direction of the applied force.

The SMA assembly of claim 2, wherein when the at least one sprung cantilever is axisymmetric, the first and second directions are symmetric about an axis of symmetry of the at least one sprung cantilever.

The SMA assembly of any one of claims 1 through 3,

the elastic sheet also comprises a movable clamping jaw connected with the elastic sheet main body, and the movable clamping jaw is centrosymmetric;

the fixing piece comprises fixed clamping jaws which are centrosymmetric, and the fixed clamping jaws and the movable clamping jaws are distributed in a staggered manner;

one end of the SMA wire is connected with the movable clamping jaw, and the other end of the SMA wire is connected with the fixed clamping jaw.

An SMA assembly according to any one of claims 1 to 4, wherein the centre of the leaf spring body is provided with a through hole.

The SMA assembly of any one of claims 1-5, wherein when the at least one leaf spring cantilever is axisymmetric,

the at least one spring plate cantilever comprises a spring plate cantilever which is in a closed ring shape,

the connecting line of the position where the elastic sheet cantilever is connected with the elastic sheet main body is the symmetry axis of the elastic sheet cantilever, and/or the position where the elastic sheet cantilever is connected with the elastic sheet main body is symmetrical about the symmetry axis of the elastic sheet cantilever;

the connecting line of the connecting position of the elastic piece cantilever and the fixing piece is the symmetry axis of the elastic piece cantilever, and/or the connecting position of the elastic piece cantilever and the fixing piece is symmetrical about the symmetry axis of the elastic piece cantilever;

or the at least one elastic sheet cantilever comprises two elastic sheet cantilevers, two ends of each elastic sheet cantilever in the two elastic sheet cantilevers are connected with the elastic sheet main body, and the middle position of each elastic sheet cantilever in the two elastic sheet cantilevers is connected with the fixing piece;

or the at least one elastic sheet cantilever comprises two elastic sheet cantilevers, the middle position of each elastic sheet cantilever in the two elastic sheet cantilevers is connected with the elastic sheet main body, and two ends of each elastic sheet cantilever in the two elastic sheet cantilevers are connected with the fixing piece;

or, the at least one elastic sheet cantilever comprises four elastic sheet cantilevers, one end of each elastic sheet cantilever in the four elastic sheet cantilevers is connected with the elastic sheet main body, and the other end of each elastic sheet cantilever is connected with the fixing piece.

The SMA assembly of any one of claims 1 to 5, wherein when the at least one leaf spring cantilever is 90 ° rotationally symmetric,

the at least one elastic sheet cantilever comprises four elastic sheet cantilevers, one end of each elastic sheet cantilever in the four elastic sheet cantilevers is connected with the elastic sheet main body, and the other end of each elastic sheet cantilever is connected with the fixing piece.

The SMA assembly of any one of claims 1 to 7, wherein the outer edge of the spring body is square or circular.

The SMA assembly of any one of claims 1 to 8, wherein the at least one dome cantilever encloses a square or circle around an outer edge of the dome body.

The SMA assembly of any one of claims 1 to 9, wherein the fixture is a metal plate and/or a printed circuit board.

An SMA assembly, comprising: a fixed piece, a spring piece component and an SMA wire,

one end of the SMA wire is connected with the fixing piece, and the other end of the SMA wire is connected with the elastic sheet assembly;

the elastic piece assembly comprises an upper elastic piece and a lower elastic piece, and the lower elastic piece is obtained by turning or rotating the upper elastic piece by 90 degrees;

the upper spring plate comprises a spring plate main body and a spring plate cantilever, one end of the spring plate cantilever is connected with the spring plate main body, and the other end of the spring plate cantilever is connected with the fixing piece.

The SMA assembly of claim 11, wherein a value K of the spring assembly in a first direction is equal to a value K of the spring assembly in a second direction, and is equal to a sum of the value K of the upper spring in the first direction and the value K of the upper spring in the second direction, the first direction and the second direction being perpendicular to each other, wherein the value K is a ratio of a magnitude of an acting force applied to the spring to a magnitude of a displacement of the spring in the acting force direction.

The SMA assembly of claim 11 or 12,

the upper elastic sheet also comprises a movable clamping jaw connected with the elastic sheet main body, and the movable clamping jaw is centrosymmetric;

the fixing piece comprises fixed clamping jaws which are centrosymmetric, and the fixed clamping jaws and the movable clamping jaws are distributed in a staggered manner;

one end of the SMA wire is connected with the movable clamping jaw, and the other end of the SMA wire is connected with the fixed clamping jaw.

An SMA assembly according to any one of claims 11 to 13, wherein the centre of the leaf body is provided with a through hole.

A lens module comprising a lens assembly and an SMA assembly as claimed in any one of claims 1 to 14, the lens assembly being connected to the SMA assembly.

An electronic device comprising an SMA assembly according to any one of claims 1 to 14; or, comprising a lens module as claimed in claim 15.

An elastic sheet, comprising: a spring main body and at least one spring cantilever,

the elastic sheet cantilever is connected with the elastic sheet main body and extends along the outer edge of the elastic sheet main body;

the at least one elastic sheet cantilever is axisymmetric or 90-degree rotational symmetric.

An elastic piece according to claim 17, wherein a difference between a K value of the elastic piece in a first direction and a K value of the elastic piece in a second direction is smaller than a preset threshold, the first direction and the second direction are perpendicular to each other, and the K value is a ratio of a magnitude of an acting force applied to the elastic piece to a magnitude of displacement of the elastic piece in the acting force direction.

The dome of claim 18, wherein the first direction and the second direction are symmetric about an axis of symmetry of the at least one dome arm when the at least one dome arm is axisymmetric.

A spring plate according to any one of claims 17 to 19, further comprising a clamping jaw connected to the spring plate body, wherein the clamping jaw is centrosymmetric.

A striking plate according to any one of claims 17 to 20, wherein a through hole is provided in the centre of the striking plate body.

A shrapnel according to any of the claims 17 to 21, wherein when the at least one shrapnel cantilever is axisymmetric,

the at least one elastic piece cantilever comprises an elastic piece cantilever which is in a closed ring shape, wherein a connecting line of a position where the elastic piece cantilever is connected with the elastic piece main body is a symmetry axis of the elastic piece cantilever, and/or the position where the elastic piece cantilever is connected with the elastic piece main body is symmetrical about the symmetry axis of the elastic piece cantilever;

or the at least one elastic sheet cantilever comprises two elastic sheet cantilevers, and two ends of each elastic sheet cantilever in the two elastic sheet cantilevers are connected with the elastic sheet main body;

or the at least one elastic sheet cantilever comprises two elastic sheet cantilevers, the middle position of each elastic sheet cantilever in the two elastic sheet cantilevers is connected with the elastic sheet main body, and two ends of each elastic sheet cantilever in the at least two elastic sheet cantilevers are free ends;

or, the at least one elastic sheet cantilever comprises four elastic sheet cantilevers, one end of each elastic sheet cantilever in the four elastic sheet cantilevers is connected with the elastic sheet main body, and the other end of each elastic sheet cantilever is a free end.

A shrapnel according to any of the claims 17 to 21, wherein when said at least one shrapnel cantilever has 90 ° rotational symmetry,

the at least one elastic sheet cantilever comprises four elastic sheet cantilevers, one end of each elastic sheet cantilever in the four elastic sheet cantilevers is connected with the elastic sheet main body, and the other end of each elastic sheet cantilever is a free end.

A shrapnel according to any of claims 17 to 23, characterized in that the outer edge of the shrapnel body is square or circular.

A dome according to any one of claims 17-24, characterized in that the at least one dome cantilever encloses a square or circle around the outer edge of the dome body.

A design method of a spring plate is characterized by comprising the following steps:

determining a first direction and a second direction which are perpendicular to each other on a first elastic sheet, wherein the first direction and the second direction are directions in which mechanical crosstalk does not exist;

turning over the first elastic sheet along a symmetry axis of the first direction and the second direction to obtain a second elastic sheet;

and designing a third elastic sheet according to the first elastic sheet and the second elastic sheet, wherein the K value of the third elastic sheet in the first direction is equal to the K value of the third elastic sheet in the second direction, the K value of the third elastic sheet in the first direction is equal to the sum of the K value of the first elastic sheet in the first direction and the K value of the first elastic sheet in the second direction, and the K value is the ratio of the acting force applied to the elastic sheet to the displacement of the elastic sheet in the acting force direction.

The method of claim 26,

the first elastic sheet comprises a first elastic sheet main body and at least one first elastic sheet cantilever, each first elastic sheet cantilever in the at least one first elastic sheet cantilever extends along the outer edge of the first elastic sheet main body, one end of each first elastic sheet cantilever is connected with the first elastic sheet main body, and the other end of each first elastic sheet cantilever is a free end;

the third elastic piece comprises a second elastic piece main body and at least one second elastic piece cantilever, each second elastic piece cantilever in the at least one second elastic piece cantilever is connected with the second elastic piece main body and extends along the outer edge of the second elastic piece main body, and the at least one second elastic piece cantilever is axially symmetrical.

The method of claim 27, wherein determining the first and second directions perpendicular to each other on the first resilient sheet comprises:

fixing the free end of the cantilever of the first elastic sheet, and applying acting forces in different directions to the first elastic sheet;

determining the displacement direction of the first elastic sheet main body under the acting forces in different directions;

and when the displacement direction of the first elastic sheet main body is the same as the acting force direction applied to the first elastic sheet, determining the acting force direction as the first direction and the second direction.

A design method of a spring plate is characterized by comprising the following steps:

rotating the first elastic sheet by 90 degrees to obtain a second elastic sheet;

and designing a third elastic sheet according to the first elastic sheet and the second elastic sheet, wherein the K value of the third elastic sheet in the first direction is equal to the K value of the third elastic sheet in the second direction, the K value of the third elastic sheet in the first direction is equal to the sum of the K value of the first elastic sheet in the first direction and the K value of the first elastic sheet in the second direction, the first direction and the second direction are mutually perpendicular, and the K value is the ratio of the acting force applied to the elastic sheet to the displacement of the elastic sheet in the acting force direction.

The method of claim 29,

the first elastic sheet comprises a first elastic sheet main body and at least one first elastic sheet cantilever, each first elastic sheet cantilever in the at least one first elastic sheet cantilever extends along the outer edge of the first elastic sheet main body, one end of each first elastic sheet cantilever is connected with the first elastic sheet main body, and the other end of each first elastic sheet cantilever is a free end;

the third elastic piece comprises a second elastic piece main body and at least one second elastic piece cantilever, each second elastic piece cantilever in the at least one second elastic piece cantilever is connected with the second elastic piece main body and extends along the outer edge of the second elastic piece main body, and the at least one second elastic piece cantilever is in 90-degree rotational symmetry.