CN211086801U

CN211086801U - Suspension assembly of optical actuator

Info

Publication number: CN211086801U
Application number: CN201922395301.XU
Authority: CN
Inventors: 钟波; 肖适; 尹蕾; 江滔
Original assignee: Chengdu Jimi Technology Co Ltd
Current assignee: Chengdu Jimi Technology Co Ltd; Chengdu XGIMI Technology Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-07-24
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses an optical actuator's subassembly that suspends in midair, including first framework and second framework, first framework includes inside casing and center one, set up at the inside casing middle part with lens complex light trap, the both sides of inside casing are connected so that the inside casing can deflect along the line of two first torque arms through first torque arm and center one respectively, the second framework includes outer fixed part and center two, the both sides of center two are connected so that center two can deflect along the line of two second torque arms through second torque arm and outer fixed part respectively to the line of two first torque arms has the contained angle with the line of two second torque arms, center two constitutes the center with center one rigid coupling. Suspension assembly can deflect along two mutually independent rotation axis that do not disturb the influence, the rotation axis can not take place the skew, improves vibration stability and precision, guarantees the stability of resolution when improving the resolution.

Description

Suspension assembly of optical actuator

Technical Field

The utility model relates to an optical projection system technical field especially relates to an optical actuator's subassembly that suspends in midair.

Background

The optical projection system is developed in the direction of high resolution, small volume and low cost, and the existing optical projection system designs that the image of the microchip panel is projected to the projection screen through the prism, the suspension component of the optical actuator and the lens, wherein the projection light passes through the lens in the actuator during the traveling process, and the suspension component of the optical actuator is used for rapidly and repeatedly vibrating (changing the projection position), so that the resolution is increased by continuously changing the position of the image. The suspension component of the existing optical actuator has poor vibration stability and low precision, the rotation vibration in different directions can generate mutual interference, the vibration error is large, the resolution is unstable, and the requirements of increasing the resolution and the stability of the projection system are difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve and the technical task who provides improve prior art, provide an optical actuator's subassembly that suspends in midair, solve optical actuator's among the prior art the subassembly that suspends in midair vibration stability poor, the error is big, the unstable problem of resolution.

For solving the above technical problem, the technical scheme of the utility model is that:

the utility model provides an optical actuator's suspension assembly, includes first framework and second framework, first framework includes inside casing and center one, inside casing middle part set up with lens complex light trap, two opposite sides of inside casing are connected so that the inside casing can deflect along the line of two first wrenches through first knuckle arm and center one respectively, the second framework include outer fixed part and center two, two opposite sides of center two are connected so that center two can deflect along the line of two second knuckle arms through second knuckle arm and outer fixed part respectively, and the line of two first knuckle arms has the contained angle with the line of two second knuckle arms, center two and center one connect and constitute the center. The suspension component of the optical actuator can deflect by using the connecting line of the two first torsion arms and the connecting line of the two second torsion arms as the rotation axis, finally realize the change of the projection angle of the lens on the suspension component, and the deflection on the two rotation axes is mutually independent and can not interfere with each other, when the inner frame deflects along the connecting line of the two first torsion arms, the inner frame can not drive the middle frame to deflect along the connecting line of the two second torsion arms, and when the middle frame deflects along the connecting line of the two second torsion arms, the middle frame can not drive the inner frame to deflect along the connecting line of the two first torsion arms, and the rotation axis formed by the connecting line of the two first torsion arms and the rotation axis formed by the connecting line of the two second torsion arms can not deflect, thereby effectively improving the vibration stability and the precision, improving the stability of the resolution and simultaneously ensuring the stability of the resolution, the stability of the optical fiber projection position is ensured, and the projection effect is improved. The middle frame II and the middle frame are combined to form the middle frame, so that the structural strength of the middle frame can be improved, the manufacturing difficulty of the suspension assembly is reduced, the middle frame is prevented from deforming in the repeated vibration process, and the vibration stability and precision are guaranteed.

Furthermore, the middle frame II, the middle frame I and the inner frame are respectively provided with a plurality of turned edges for reinforcement, so that the structural strength and stability are improved, deformation is avoided, the vibration stability and precision are improved, and the resolution of a projection picture is optimized.

Furthermore, a plurality of the turned edges are close to the first torsion arms and perpendicular to the connecting line direction of the two first torsion arms, a plurality of the turned edges are close to the second torsion arms and perpendicular to the connecting line direction of the two second torsion arms, the joints of the first torsion arms and the second torsion arms with the middle frame and the inner frame are most easily deformed and damaged, the turned edges are utilized to improve the structural stability of the joints, conditions such as deformation or breakage are avoided, and the vibration stability and precision are improved.

Furthermore, the inner frame be provided with turn-ups first in its outward flange department that leans on second torque arm one side, second middle frame has set up at its inward flange that leans on second torque arm one side and has adjacent and have gapped turn-ups second with turn-ups one, adopts this kind of structure can shorten the inner frame to the distance of outer fixed part, can reduce the length of hanging in midair subassembly in two second torque arm line directions, improves compact structure nature, reduces optical actuator's occupation space, satisfies miniaturized development demand. When the inner frame and the middle frame are of an integrated structure formed by punching a metal sheet, the distance from the inner frame to the outer fixing part is difficult to shorten if the structures of the adjacent turning edge I and the turning edge II are adopted, because when the integrated metal sheet is adopted for manufacturing, the distance between the turning edge I and the turning edge II is the minimum equal to the height of the turning edge I plus the height of the turning edge II, namely the distance from the turning edge I to the turning edge II is wider, so that the whole occupied volume of the suspension assembly cannot be reduced, the utility model adopts the split structure of the middle frame formed by combining the middle frame II and the middle frame, namely the turning edge I and the turning edge II are completely independently formed and do not interfere with each other, the distance between the turning edge I and the turning edge II is irrelevant to the height of the turning edge I and the height of the turning edge II, the turning edge I and the turning edge II are respectively formed and then assembled, so that the distance from the turning edge I to the turning edge II can be manufactured to be very small as required, the distance from the first flanging edge to the second flanging edge is actually smaller than the height of the first flanging edge and the height of the second flanging edge, so that compared with an integrated structure of the inner frame and the middle frame, the adjacent first flanging edge and the adjacent second flanging edge are arranged on the basis that the middle frame is formed by combining the middle frame and the middle frame, the occupied size can be effectively reduced, and the structural compactness is improved.

Furthermore, center one, first torque arm and inside casing for the integrative structure that the sheetmetal blanking formed, center two, second torque arm and outer fixed part for the integrative structure that the sheetmetal blanking formed, compact structure, occupation space are little, processing is convenient, with low costs, the equipment is convenient, efficient.

Furthermore, when the middle frame II is connected with the middle frame I, a superposed overlapping area is formed between the middle frame II and the middle frame I, so that the middle frame has two layers of thicknesses, the structural strength can be improved, the middle frame is prevented from deforming, the vibration stability and the precision are improved, and the projection effect is improved.

Furthermore, the overlapping area of the second middle frame and the first middle frame is welded and connected, so that the connection is convenient and firm, and the structural strength is high.

Furthermore, the connecting line of the two first torque arms is perpendicular to the connecting line of the two second torque arms, so that the interference influence of deflection on each other on two rotation axes can be reduced to the maximum extent, when the inner frame is driven by the action force along the circumferential direction of the connecting line of the two first torque arms, the inner frame deflects by taking the connecting line of the two first torque arms as the rotation axial direction, the deflection action force at the moment is just along the plane where the connecting line of the two second torque arms is located, the second torque arms can be prevented from twisting to the maximum extent, vibration can be ensured to occur only along the circumferential direction of the connecting line of the two first torque arms, the stability and the precision of deflection are improved, and the image position can be accurately changed.

Furthermore, the first torque arm is a linear rib arranged along the connecting line direction of the two first torque arms, and the second torque arm is a linear rib arranged along the connecting line direction of the two second torque arms, so that the structure is simple and compact, the stability is good, the occupied space is small, the processing is convenient, and the cost is low.

Furthermore, a first installation position for installing the coil assembly is arranged on the inner frame, the first installation position is located on the side of the connecting line direction of the first torsion arms, a second installation position for installing the coil assembly is arranged on the middle frame, the second installation position is located on the side of the connecting line direction of the second torsion arms, the on-off switching of the coil assembly is realized to attract or repel a magnetic force piece fixedly arranged on a suspension assembly of the optical actuator, so that a deflection acting force is generated on the suspension assembly, the coil assembly on the first installation position drives the inner frame to deflect along the connecting lines of the two first torsion arms, the coil assembly on the second installation position drives the middle frame to deflect along the connecting lines of the two second torsion arms, and finally, the vibration change of the lens of the inner frame on the three-dimensional direction is realized.

Compared with the prior art, the utility model discloses the advantage lies in:

optical actuator's the subassembly that suspends in midair can deflect along two mutually independent and the rotation axis that does not disturb the influence, the skew can not take place for the rotation axis, can effectively improve vibration stability and precision, guarantee the stability of resolution when improving the resolution, ensure the stability of optic fibre projection position, improve the projection effect.

Drawings

FIG. 1 is a schematic diagram of an assembly structure of a suspension assembly of an optical actuator;

FIG. 2 is an exploded view of a suspension assembly of the optical actuator;

FIG. 3 is an exploded view of the optical actuator;

fig. 4 is a schematic cross-sectional view of the optical actuator after assembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model discloses an optical actuator's subassembly that suspends in midair, compact structure, occupation space are little, and structural stability is good, intensity is high, and the ascending torsional vibration of equidirectional not can not mutual production interference, and vibration stability is good, the accuracy is high, improvement resolution that can be stable.

As shown in fig. 1 and 2, a suspension assembly of an optical actuator mainly includes a first frame b and a second frame c, the first frame b includes an inner frame 13 and a first middle frame 121, a light hole 14 matched with a lens is formed in the middle of the inner frame 13, two opposite sides of the inner frame 13 are respectively connected with the first middle frame 121 through first torsion arms 15 so that the inner frame 13 can deflect along a connecting line of the two first torsion arms 15, the second frame c includes an outer fixing portion 11 and a second middle frame 122, two opposite sides of the second middle frame 122 are respectively connected with the outer fixing portion 11 through second torsion arms 16 so that the second middle frame 122 can deflect along a connecting line of the two second torsion arms 16, a connecting line of the two first torsion arms 15 is perpendicular to a connecting line of the two second torsion arms 16, the second middle frame 122 is fixedly connected with the first middle frame 121 to form a middle frame 12, a connecting line direction of the two first torsion arms 15 and a connecting line direction of the two second torsion arms 16 are two mutually independent rotation axes, the connecting direction of the two first torsion arms 15 is hereinafter referred to as the first rotation axis, the connecting direction of the two second torsion arms 16 is hereinafter referred to as the second rotation axis, and the deflection motion of the inner frame 13 along the first rotation axis and the deflection motion of the middle frame 12 along the second rotation axis are independent of each other without interfering with each other.

The first torsion arm 15 and the second torsion arm 16 are respectively configured to be elastically deformed along the circumferential direction of the first rotation axis and the second rotation axis, so as to implement the deflection vibration along the first rotation axis and the second rotation axis, specifically, the first torsion arm 15 is a linear rib disposed along the connecting line of the two first torsion arms 15, and the second torsion arm 16 is a linear rib disposed along the connecting line of the two second torsion arms 16, which has a simple and compact structure, is convenient to process, and has a low cost, and the first torsion arm 15 and the second torsion arm 16 may also adopt other structures having elastic deformation capability as long as the elastic deformation in the circumferential direction can be implemented, for example, the first torsion arm 15 and the second torsion arm 16 are L-shaped, S-shaped, and the like.

The inner frame 13 is provided with a first mounting location 19 for mounting the coil assembly 3, the first mounting location 19 is located on the side of the connecting direction of the first torsion arm 15, the middle frame 12 is provided with a second mounting location 20 for mounting the coil assembly 3, the second mounting location 20 is located on the side of the connecting direction of the second torsion arm 16, in the embodiment, the inner frame 13 and the middle frame 12 are approximately rectangular, the first torsion arm 15 is located in the middle of the frame sides of two opposite sides of the inner frame 13, the first mounting location 19 is located on the frame side of the inner frame 13 perpendicular to the frame side of the first torsion arm 15, the second torsion arm 16 is located in the middle of the frame sides of two opposite sides of the middle frame 12, and the second mounting location 20 is located on the frame side of the middle frame 12 perpendicular to the frame side of the first torsion arm 15.

Middle frame 121, first torque arm 15 and inside casing 13 are the integrative structure that the sheetmetal blanking formed, middle frame two 122, second torque arm 16 and outer fixed part 11 for the integrative structure that the sheetmetal blanking formed, simple structure, compactness, occupation space is little, processing is convenient. In addition, in the embodiment, when the second middle frame 122 is connected with the first middle frame 121, a superposed area is formed between the two middle frames, and the superposed area of the second middle frame 122 and the first middle frame 121 is welded, so that the middle frame 12 has two layers of thicknesses, the structural strength can be effectively improved, the middle frame 12 is prevented from deforming and breaking when repeatedly vibrating, the vibration stability and precision are guaranteed, and the stability of the resolution is guaranteed while the resolution is improved;

the middle frame II 122, the middle frame I121 and the inner frame 13 are respectively provided with a plurality of flanged edges 17 for reinforcement, so that the structural strength is improved, the deformation is avoided, and the vibration stability and precision are improved;

specifically, a turning edge 17 which is close to the first torsion arm 15 and is perpendicular to the connecting line direction of the two first torsion arms 15 and a turning edge 17 which is close to the second torsion arm 16 and is perpendicular to the connecting line direction of the two second torsion arms 16 are arranged, so that the connection parts of the first torsion arm and the second torsion arm with the middle frame II, the middle frame I and the inner frame are prevented from being deformed and damaged during torsional vibration, the structural stability is improved, and the vibration stability and precision are ensured;

the turned edge 17 on the inner frame 13 comprises a turned edge I21 arranged at the outer edge close to one side of the second torque arm 16, the middle frame I121 does not have a frame in the direction where the turned edge I21 is arranged and is arranged in a notch shape, the turned edge 17 on the middle frame II 122 comprises a turned edge II 22 which is arranged at the inner edge close to one side of the second torque arm 16, is adjacent to the turned edge I21 and has a gap, the structure is adopted, the distance from the inner frame to an outer fixing part can be shortened while the structural strength is improved, the length of the suspension assembly in the connecting line direction of the two second torque arms is reduced, the size of the optical actuator can be reduced, and the requirement for miniaturization development is met.

The outer fixing portion 11 is provided with a mounting hole 18 for fixing, the outer fixing portion 11 is fastened on a main bracket of the optical actuator by passing a bolt through the mounting hole, the two sides of the second torsion arm 16 are respectively provided with one mounting hole, the stability of the second torsion arm 16 is improved, and the situation that the second torsion arm 16 is displaced to cause vibration deviation is avoided.

As shown in fig. 3 and 4, the optical actuator further includes a main support 4, a magnetic member 5 and a coil assembly 3, the main support 4 is provided with a light-transmitting area 41, the suspension assembly a is connected to the main support 4 through an outer fixing portion 11, a light-transmitting hole 14 of a rear inner frame 13 is opposite to the light-transmitting area 41, the lens 2 is connected to the inner frame 13 and is opposite to the light-transmitting hole 14, the magnetic member 5 is fixed to the main support 4 and is opposite to the coil assembly 3, the coil assembly 3 is switched to an operating state so as to attract or repel the magnetic member 5 and drive the suspension assembly to swing, specifically, the magnetic member 5 includes a metal member 51 fixed to the main support 4 and a magnet 52 mounted on the metal member 51, the metal member 51 is provided with an extension portion inserted into a hollow area of the coil assembly 3 and forms a U-shaped magnetic pole, so that the coil assembly 3 is, the repeated movement of the magnetic force can be controlled by current, when the coil component 3 is electrified, the magnetic field of the magnetic force piece 5 can actuate the coil component 3 by utilizing the Faraday's law of electromagnetic induction, so that the coil component 3 moves, and the suspension component is driven to do periodic deflection movement by changing the current direction to realize the function of a galvanometer.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. The suspension component of the optical actuator is characterized by comprising a first frame body (b) and a second frame body (c), wherein the first frame body (b) comprises an inner frame (13) and a first middle frame (121), a light hole (14) matched with a lens is formed in the middle of the inner frame (13), two opposite sides of the inner frame (13) are respectively connected with the first middle frame (121) through first torsion arms (15) so that the inner frame (13) can deflect along the connecting line of the two first torsion arms (15), the second frame body (c) comprises an outer fixing part (11) and a second middle frame (122), two opposite sides of the second middle frame (122) are respectively connected with the outer fixing part (11) through second torsion arms (16) so that the second middle frame (122) can deflect along the connecting line of the two second torsion arms (16), and the connecting line of the two first torsion arms (15) and the connecting line of the two second torsion arms (16) have an included angle, the second middle frame (122) is fixedly connected with the first middle frame (121) to form the middle frame (12).

2. The suspension assembly of claim 1, wherein the second middle frame (122), the first middle frame (121) and the inner frame (13) are respectively provided with a plurality of reinforcing flanging edges (17).

3. Suspension assembly of an optical actuator according to claim 2, wherein several of the flanging edges (17) are adjacent to the first torsion arm (15) and perpendicular to the direction of the line of the two first torsion arms (15), and several of the flanging edges (17) are adjacent to the second torsion arm (16) and perpendicular to the direction of the line of the two second torsion arms (16).

4. Suspension assembly of an optical actuator according to claim 2, characterized in that the inner frame (13) is provided with a first flanging (21) at its outer edge on the side of the second torsion arm (16), and the inner frame (122) is provided with a second flanging (22) adjacent to the first flanging (21) with a gap at its inner edge on the side of the second torsion arm (16).

5. Suspension assembly of an optical actuator according to any of claims 1 to 4, wherein the first middle frame (121), the first torsion arm (15) and the inner frame (13) are of a one-piece structure stamped from sheet metal, and the second middle frame (122), the second torsion arm (16) and the outer fixing portion (11) are of a one-piece structure stamped from sheet metal.

6. A suspension assembly for an optical actuator according to any one of claims 1 to 4, wherein the second intermediate frame (122) and the first intermediate frame (121) are joined with an overlapping overlap region therebetween.

7. The suspension assembly of an optical actuator according to claim 6, wherein the overlapping areas of the second middle frame (122) and the first middle frame (121) are welded.

8. Suspension assembly of an optical actuator according to any of claims 1 to 4, wherein the line of the two first torsion arms (15) is perpendicular to the line of the two second torsion arms (16).

9. A suspension assembly for an optical actuator according to any of claims 1 to 4, wherein the first torsion arms (15) are linear ribs arranged along the line connecting two first torsion arms (15), and the second torsion arms (16) are linear ribs arranged along the line connecting two second torsion arms (16).

10. Suspension assembly of an optical actuator according to any of claims 1 to 4, wherein the inner frame (13) is provided with a first mounting location (19) for mounting the coil assembly (3), said first mounting location (19) being located laterally to the direction of the wiring of the first torsion arm (15), and wherein the inner frame is provided with a second mounting location (20) for mounting the coil assembly (3), said second mounting location (20) being located laterally to the direction of the wiring of the second torsion arm (16).