Cross-shaped flexible supporting mechanism and fast reflecting mirror device

Abstract

The invention discloses a cross-shaped flexible supporting mechanism and a fast reflecting mirror device, and belongs to the technical field of fast reflecting mirrors. The cross-shaped flexible supporting mechanism is characterized by comprising a bottom connecting end, a lens group connecting end and a flexible assembly which are integrally formed, the flexible assembly comprises a first flexible beam and a second flexible beam which are arranged in pairs and are crossed; the first end of the first flexible beam is connected with the bottom connecting end, the second end of the first flexible beam is connected with the first end of the adjacent second flexible beam, and the second end of the second flexible beam is connected with the lens group connecting end; moreover, the first flexible beam only has the degree of freedom of deflection around a first axis, the second flexible beam only has the degree of freedom of deflection around a second axis, and the first axis is orthogonal to the second axis. By means of the integrated structure, the machining time can be shortened, and the manufacturing cost is saved; according to the structure, the assembly difficulty can be reduced, most assembly stress can be eliminated after assembly, and the stability and the positioning precision of products are obviously helped.

Description

Technical Field

[0001] The invention relates to the technical field of fast-reflection mirrors, and in particular to a cross-flexible support mechanism and a fast-reflection mirror device. Background Art

[0002] The full name of the fast reflector is the fast control reflector. It is a device that controls the fast and precise unidirectional or bidirectional deflection movement of the reflector to perform high-precision and high-dynamic control between the light source and the positioning target, so as to constrain the light beam to point quickly and accurately within the required range. It plays a key role in the fields of laser weapons, laser communications, optoelectronic stable tracking and aiming, image motion compensation, optical scanning, etc. The fast reflector is mainly composed of a reflector, a voice coil motor, a reflector bracket, a reflector angle measurement sensor, a flexible support mechanism, a base, a main control module, etc. Among them, the flexible support mechanism, as an important component connecting the base and the reflector, can directly affect the support strength of the reflector and the deflection deflection along the specified direction, thereby affecting the support strength and support stability of the product's reflector, and then affecting the imaging quality, positioning accuracy and repeatability of the reflector.

[0003] There are two main types of existing flexible support mechanisms: one is a hinge mechanism composed of multiple parts; the other is a complex single-part structure with extremely high precision requirements. Their main disadvantages are as follows:

[0004] The main disadvantages of multi-part components are: 1) Because the mechanism needs to be assembled, the processing accuracy and assembly requirements of the component parts are very high, which greatly increases the processing cost and time cost and reduces the qualified rate of parts; 2) Assembly errors and assembly stresses are inevitable during assembly, which is not conducive to the repeated positioning accuracy and stability of the mechanism. At the same time, too many parts can easily increase the difficulty of product troubleshooting, which is not conducive to the later maintenance of the product after mass production.

[0005] The main disadvantages of the existing single-part structure are: 1) complex structure, complicated processing procedures, high process requirements, and low yield rate; 2) high processing precision, high processing requirements, high processing difficulty, and low yield rate.

[0006] In view of this, it is necessary to propose a new technical solution to solve the above technical problems. Summary of the invention

[0007] The purpose of the present invention is to provide a cross-flexible support mechanism and a quick-reflecting mirror device, whose integrated structure can reduce processing time and save manufacturing costs; the structure can reduce the difficulty of assembly, and can eliminate most of the assembly stress after assembly, which is significantly helpful for the stability and positioning accuracy of the product.

[0008] To achieve the above purpose, the present invention adopts the following technical means:

[0009] A first aspect of the present invention provides a cross flexible support mechanism, which includes an integrally formed bottom connection end, a lens group connection end, and a flexible component;

[0010] The flexible assembly includes a first flexible beam and a second flexible beam arranged in pairs and cross-shaped; the first end of the first flexible beam is connected to the bottom connection end, the second end of the first flexible beam is connected to the first end of the adjacent second flexible beam, and the second end of the second flexible beam is connected to the lens group connection end;

[0011] Furthermore, the first flexible beam has only a degree of freedom to deflect about a first axis, and the second flexible beam has only a degree of freedom to deflect about a second axis, and the first axis is orthogonal to the second axis.

[0012] As a further improvement, the cross-shaped flexible support mechanism is cylindrical as a whole.

[0013] As a further improvement, the top end of the first flexible beam extends to both sides to form a first extension section, the bottom end of the second flexible beam extends to both sides to form a second extension section, and the ends of the first extension section and the second extension section are connected by a vertical piece.

[0014] As a further improvement, the two circumferential sides of the flexible beam are symmetrically recessed inward to form arc grooves, square grooves or triangular grooves, so that the circumferential thickness of the middle portion of the flexible beam is smaller than its radial thickness.

[0015] As a further improvement, a preset height is provided between the top end surface of the lens assembly connection end and the top end surface of the first flexible beam; a preset height is provided between the bottom end surface of the second flexible beam and the top end surface of the bottom connection end.

[0016] As a further improvement, the center points of all the deflection beams are located in the same horizontal plane.

[0017] A second aspect of the present invention provides a fast mirror device, which includes a base, a bracket equipped with a reflector, four voice coil motors and the cross-shaped flexible support mechanism as described above;

[0018] The bottom connection end is fixedly connected to the top of the base, and the lens group connection end is fixedly connected to the bottom center of the bracket;

[0019] Four voice coil motors are installed between the base and the bracket, and the voice coil motors are used to drive a part of the bracket to perform lifting movement, thereby realizing the deflection movement of the entire bracket around the first axis and the second axis.

[0020] As a further improvement, a top hole is provided at the center of the lens group connection end, a bottom hole is provided at the center of the bottom connection end, and the bottom hole is coaxial with the top hole; a convex column is provided at the center of the bottom of the bracket, and a boss with a step is provided at the center of the top surface of the base;

[0021] After assembly, the boss is embedded in the top hole, and the top end surface of the lens group connecting end is fitted with the bottom surface of the bracket; the boss is embedded in the bottom hole, and the bottom end surface of the bottom connecting end is fitted with the end surface of the step.

[0022] As a further improvement, a rotation angle sensor is provided between the bracket and each voice coil motor.

[0023] As a further improvement, a ceramic gasket is provided between the rotation angle sensor and the voice coil motor.

[0024] Compared with the prior art, the present invention brings the following technical effects:

[0025] The deflection beam of the present invention has the freedom to deflect around the first axis and the second axis respectively, and the two axes are orthogonal. When the entire support structure is installed on the quick-reflection mirror device, it can cooperate with the voice coil motor to realize the function of the quick-reflection mirror; the bottom connecting end, the mirror group connecting end and the flexible component are made into an integrated structure, which can reduce the processing time and save the manufacturing cost; during installation, it is only necessary to connect the upper and lower connecting ends to the bracket and the base respectively, which can greatly reduce the difficulty of assembly. After assembly, most of the assembly stress can be eliminated, which is obviously helpful for the stability and positioning accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic structural diagram of a fast-reflecting mirror device is shown;

[0028] Figure 2 A bottom view of a fast mirror device of the invention is shown (the base is omitted);

[0029] Figure 3 A top view of a fast mirror device of the invention is shown;

[0030] Figure 4 A perspective view of a cross-flexible support mechanism of the invention is shown;

[0031] Figure 5 A view of a cross flexible support mechanism of the invention facing the Y axis is shown;

[0032] Figure 6 Shows Figure 5 A stereogram rotated a small angle along the Z axis;

[0033] Figure 7 A view of a cross flexible support mechanism of the invention facing the X-axis is shown;

[0034] Figure 8 Shows Figure 7 A stereogram rotated a small angle along the Z axis;

[0035] Fig. 9 A schematic diagram showing the center positions of all the flexible beams of a cross flexible support mechanism of the present invention is shown.

[0036] Description of main component symbols:

[0037] Quick-reflecting mirror device-100; base-10; boss-11; step-111; bracket-20; reflector-21; boss-22; voice coil motor-30; main control module-40; angle sensor-50; ceramic gasket-60; cross flexible support mechanism-90; bottom connecting end-91; bottom hole-911; mirror group connecting end-92; top hole-921; first deflection beam-94; first extension section-941; second deflection beam-95; second extension section-951; vertical sheet-96. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0040] Example

[0041] See also Figure 1-3 This embodiment discloses a fast mirror device 100, which includes a base 10, a bracket 20 equipped with a reflector 21, four voice coil motors 30, a cross flexible support mechanism 90 and a main control module 40. The main control module 40 includes a power supply, a control circuit, etc., and is used to connect the four voice coil motors 30 and control them to perform corresponding actions according to a certain program. The structure and function of the main control module 40 are all existing conventional technologies and will not be repeated in this embodiment.

[0042] The base 10 is a mounting body for connecting the fast mirror device 100 to external equipment. The reflector 21 is fixedly mounted on the bracket 20 and moves therewith. In this embodiment, the bracket 20 is substantially square.

[0043] The bracket 20 is in a suspended state relative to the base 10, and the two are softly connected by four voice coil motors 30. Specifically, the four voice coil motors 30 are installed in an array between the base 10 and the bracket 20, and the four voice coil motors 30 correspond to the four corners of the bracket 20. It is worth mentioning that each voice coil motor 30 has a stator part and a mover part. After the motor is powered on, the mover part can move back and forth within a certain stroke range of the axis of the voice coil motor 30. The stator part and the mover part of the voice coil motor 30 are respectively connected to the base 10 and the bracket 20, so that each voice coil motor 30 can drive a part of the bracket 20 to perform lifting and lowering movements, thereby realizing a small deflection movement of the entire bracket 20. In this embodiment, the four voice coil motors 30 are arranged in groups of two to control the deflection movement of the bracket 20. The structure and function of the voice coil motor 30 belong to common knowledge in the field, and will not be repeated in this embodiment.

[0044] In this embodiment, an angle sensor 50 is provided between the bracket 20 and the voice coil motor 30, and a ceramic gasket 60 is provided between the angle sensor 50 and the voice coil motor 30. The angle sensor 50 is used to measure the deflection angle information of the bracket 20, and then feed it back to the main control module 40, and the main control module 40 controls the voice coil motor 30 to perform corresponding actions, thereby realizing the deflection of the bracket 20. The ceramic gasket 60 is used to make up for the installation gap error between the angle sensor 50 and the voice coil motor 30, so as to ensure that the bracket 20 remains horizontal in the initial state and reduce the installation stress.

[0045] See also Figure 4-8 The cross flexible support mechanism 90 includes an integrally formed bottom connection end 91, a lens group connection end 92 and a flexible component. Specifically in the present embodiment, the structure formed by the bottom connection end 91, the lens group connection end 92 and the flexible component is a cylinder as a whole. More specifically, the lens group connection end 92 is in a pancake shape, and the bottom connection end 91 is in a circular ring shape. The flexible component is connected between the two from the periphery of the cylinder, and the cylinder is hollow. This geometric structure saves trouble for the assembly work of the present invention, can reduce the difficulty of assembly, and improve the assembly efficiency.

[0046] The cross flexible support mechanism 90 is connected between the base 10 and the bracket 20, and is used to limit the deflection movement of the bracket 20. Specifically, a boss 11 is provided at the center of the end surface of the base 10 facing the bracket 20, and a step 111 is further provided in the middle of the boss 11. A boss 22 is provided at the center of the end surface of the bracket 20 facing the base 10; correspondingly, a top hole 921 is provided at the center of the lens group connection end 92, and a bottom hole 911 is provided at the center of the bottom connection end 91, and the bottom hole 911 is coaxial with the top hole 921. After assembly, the boss 22 is embedded in the top hole 921, and the top end surface of the lens group connection end 92 is in contact with the bottom surface of the bracket 20; the step 111 is embedded in the bottom hole 911, and the bottom end surface of the bottom connection end 911 is in contact with the end surface of the step 111, so that the geometric centers of the bracket 20, the lens group connection end 92, and the bottom connection end 91 can be ensured to be coaxial.

[0047] Please refer to Figure 4 In this embodiment, the flexible component includes a first flexible beam 94 and a second flexible beam 95 which are arranged in pairs and cross-shaped; the bottom end of the first flexible beam 94 is connected to the bottom connecting end 91, the top end of the first flexible beam 94 is connected to the bottom end of the adjacent second flexible beam 95, and the top end of the second flexible beam 95 is connected to the mirror group connecting end 92; the number of the first flexible beam 94 and the second flexible beam 95 are both two, which are arranged cross-shaped.

[0048] by Figure 4 The displayed coordinates are for reference. The first deflection beam 94 has only the degree of freedom to deflect around the Y axis, and the second deflection beam 95 has only the degree of freedom to deflect around the X axis. This is specifically achieved as follows: the first deflection beam 94 and the second deflection beam 95 have the same shape, both of which are arc pieces in the Z direction. The two sides of the arc piece are symmetrically recessed inward to form an arc groove, so that the circumferential thickness of the middle part of the flexible beam is smaller than its radial thickness. When subjected to a small force, the deflection beam of this structure is very easy to bend and deform around an axis perpendicular to the arc piece and passing through the center point of the arc piece, but it is difficult to bend and deform in other directions. In addition, the symmetrical structure ensures that the deflection beam is subjected to the same resistance whether it is deflected in the forward direction or the reverse direction.

[0049] In this embodiment, the two first deflection beams 94 are arranged in a spaced relationship along the Y axis, which further strengthens the above deformation characteristics, so that the first deflection beams 94 only have the degree of freedom to deflect around the Y axis. Similarly, the two second deflection beams 95 are arranged in a spaced relationship along the X axis, which also strengthens the above deformation characteristics, so that the second deflection beams 95 only have the degree of freedom to deflect around the X axis. After the cross-flexure support mechanism 90 is installed, the movement of the bracket 20 will be limited to deflection around the two degrees of freedom of the X axis and the Y axis.

[0050] See also Fig. 9More specifically, the center points of all the deflection beams are located in the same horizontal plane. This arrangement has two advantages: first, it can reduce the size of the entire cross flexible support mechanism 90 in the Z direction and reduce the volume; second, this arrangement actually places the two deflection axes of the bracket 20 in the same plane, which can further improve the accuracy of the deflection action.

[0051] More specifically, the top end of the first flexible beam 94 extends to both sides to form a first extension section 941, the bottom end of the second flexible beam 95 extends to both sides to form a second extension section 951, and the ends of the first extension section 941 and the second extension section 951 are connected by a vertical piece 96. Overall, the lens assembly connection end 92 constitutes the top wall of the cylinder, the flexible assembly constitutes the side wall of the cylinder, and the bottom connection end 91 constitutes the bottom of the side wall of the cylinder.

[0052] In this embodiment, when the bracket 20 deflects along the Y-axis, the mirror group connecting end 92 and the second flexible beam 95 form a whole, and the whole deflects relative to the bottom connecting end 91; when the bracket 20 deflects along the X-axis, the first flexible beam 94 and the bottom connecting end 91 form a whole, and the mirror group connecting end 92 deflects relative to the whole.

[0053] It is worth mentioning that there is a preset height between the top surface of the mirror group connection end 92 and the top surface of the first flexible beam 94, so that there is space for the bracket 20 to deflect around the X axis, and the deflection angle of the bracket 20 can be limited to be not too large; there is a preset height between the bottom surface of the second flexible beam 95 and the top surface of the bottom connection end 91, so that there is space for the bracket 20 to deflect around the Y axis, and the deflection angle of the bracket 20 can be limited to be not too large. For example, the deflection angle of the bracket 20 relative to the X axis and the Y axis of the present embodiment is not greater than 2°, and the above preset height can be flexibly set according to the deflection angle range of the quick reflex mirror.

[0054] In summary, the cross flexible support mechanism 90 of the invention is integrally formed, which can reduce processing time and save manufacturing costs; the first deflection beam 94 and the second deflection beam 95 have the freedom to deflect around the Y-axis and the X-axis respectively, so that when the bracket 20 deflects along the Y-axis, the mirror group connecting end 92 and the second flexible beam 95 form a whole, and the whole deflects relative to the bottom connecting end 91; when the bracket 20 deflects along the X-axis, the first flexible beam 94 and the bottom connecting end 91 form a whole, and the mirror group connecting end 92 deflects relative to the whole, thereby well realizing the function of the fast reflex mirror; at the same time, when assembling the fast reflex mirror device 100, it is only necessary to connect the upper and lower connecting ends to the bracket 20 and the base 10 respectively, which can greatly reduce the difficulty of assembly. After assembly, most of the assembly stress can be eliminated, which is of obvious help to the stability and positioning accuracy of the product.

[0055] Other Notes

[0056] The flexible beam of the present embodiment is configured to be symmetrically recessed inward along both sides of the circumference to form an arc groove. In some other embodiments, it can also be configured to be recessed inward to form a square groove or a triangular groove, so that the circumferential thickness of the middle part of the flexible beam is smaller than its radial thickness, which can also achieve the flexible beam having the freedom to deflect only around one axis.

[0057] The cross flexible support mechanism 90 of the present application can be made of metal or plastic material, and the processing technology can be machine tool processing or 3D printing.

[0058] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom still fall within the scope of protection of the present invention.

Claims

1. A cross flexible support mechanism, characterized in that: It includes an integrally formed bottom connection end, a lens group connection end and a flexible component; The flexible assembly includes a first flexible beam and a second flexible beam arranged in pairs and cross-shaped; the first end of the first flexible beam is connected to the bottom connection end, the second end of the first flexible beam is connected to the first end of the adjacent second flexible beam, and the second end of the second flexible beam is connected to the lens group connection end; Furthermore, the first flexible beam has only a degree of freedom to deflect about a first axis, and the second flexible beam has only a degree of freedom to deflect about a second axis, and the first axis is orthogonal to the second axis.

2. The cross flexible support mechanism according to claim 1, characterized in that: The cross-shaped flexible support mechanism is cylindrical in shape as a whole.

3. The cross flexible support mechanism according to claim 2, characterized in that: The top end of the first flexible beam extends to both sides to form a first extension section, the bottom end of the second flexible beam extends to both sides to form a second extension section, and the ends of the first extension section and the second extension section are connected through a vertical piece.

4. The cross flexible support mechanism according to claim 3, characterized in that: The two sides of the flexible beam in the circumferential direction are symmetrically recessed inward to form arc grooves, square grooves or triangular grooves, so that the circumferential thickness of the middle part of the flexible beam is smaller than its radial thickness.

5. The cross flexible support mechanism according to claim 4, characterized in that: There is a preset height between the top end surface of the lens assembly connection end and the top end surface of the first flexible beam; there is a preset height between the bottom end surface of the second flexible beam and the top end surface of the bottom connection end.

6. The cross flexible support mechanism according to claim 1, characterized in that: The center points of all the deflection beams are located in the same horizontal plane.

7. A fast mirror device, characterized in that: It comprises a base, a bracket equipped with a reflector, four voice coil motors and a cross-shaped flexible support mechanism as claimed in any one of claims 1 to 6; The bottom connection end is fixedly connected to the top of the base, and the lens group connection end is fixedly connected to the bottom center of the bracket; Four voice coil motors are installed between the base and the bracket, and the voice coil motors are used to drive a part of the bracket to perform lifting movement, thereby realizing the deflection movement of the entire bracket around the first axis and the second axis.

8. The fast mirror device according to claim 7, characterized in that: A top hole is provided at the center of the lens assembly connection end, a bottom hole is provided at the center of the bottom connection end, and the bottom hole is coaxial with the top hole; a convex column is provided at the center of the bottom of the bracket, and a convex platform with steps is provided at the center of the top surface of the base; After assembly, the boss is embedded in the top hole, and the top end surface of the lens group connecting end is fitted with the bottom surface of the bracket; the boss is embedded in the bottom hole, and the bottom end surface of the bottom connecting end is fitted with the end surface of the step.

9. The fast mirror device according to claim 7, characterized in that: A rotation angle sensor is provided between the bracket and each of the voice coil motors.

10. The fast mirror device according to claim 9, characterized in that: A ceramic gasket is arranged between the rotation angle sensor and the voice coil motor.

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