TWI699556B - Suspension system of single axis optical actuator - Google Patents

Abstract

A suspension system of a single-axis optical actuator, which is mainly provided with a frame-shaped suspension spring piece, and a cantilever is protruded at two opposite ends through a cut edge and a turning part, and one side of the suspension spring piece is provided with a magnetic device At the same time, it is erected by a cantilever above a reinforcing frame, which can carry an optical lens. When the actuator passes current to the magnetic device through the connector, it can produce repeated adsorption or repelling force on one side of the suspended shrapnel. To make the suspended elastic sheet itself become a swinging piece, and at the same time, take the virtual axis between the two turning parts on the frame as the axis, and carry the optical lens to produce rapid limit swing on both sides respectively.

Description

Suspension system of single axis optical actuator

The present invention relates to a suspension system of a single-axis optical actuator, and particularly relates to a suspension system suitable for a micro-optical actuator of a projection device. The suspension system has a single-axis direction swing characteristic and can make the actuator swing More stable and accurate, greatly improving the resolution and stability of the projection.

More advanced optical projection systems are not only required to be compact in size, but also have better projection resolution and lower costs. Under these three prerequisites, the current more advanced optical projection system design, please refer to page 11 12. As shown in Figure 12, the image of the microchip panel 92 (for example: DMD) is projected onto the projection screen (not shown in the figure) through the prism 91, the actuator 80, and the lens 90; the projection light will be Pass through the lens in the actuator 80, and perform rapid repeated vibration (change the projection position) through the actuator 80, and increase the resolution by continuously changing the position of the image.

However, a common structure of the conventional actuator 80, as shown in Figures 13, 14 and 15, has a base 81, and a square assembly slot 801 is provided in the center of the base 81, and the assembly slot 801 is opposite to each other. There is a bearing 82 and a rotating shaft 83 in each position; a swinging member 84 is provided between the two rotating shafts 83; the swinging member 84 is composed of a carrier 841 and a lens 842, so when the actuator is on the receiving side Under the electromagnetic action (not shown in the figure), the swing member 84 can be driven to take the axis L1 between the two bearings 82 and the shaft 83 as The baseline is the most commonly used method to make the two sides of the swing member 84 swing up and down regularly to change the position of the projection.

However, the conventional actuator 80 structure, due to its imperfect design, often has the following shortcomings in actual use:

1. It is customary to use the bearing 82 and the rotating shaft 83 as the fulcrum, but there is a gap between the bearing 82 and the rotating shaft 83, so when it swings up and down on both sides quickly, the position of the fulcrum itself will jump up and down due to the gap, or the rotating shaft 83 The bearing 82 also has an axial offset, which causes the position of the light projection to change from time to time due to the gap and the axial displacement, resulting in unpredictable errors, and the resolution is unstable, which is the main disadvantage of conventional use.

2. A bearing 82 is provided on the base 81 of the actuator 80, and the volume cannot be reduced or thinned. This limits the volume of the product and does not have the prospect of subsequent product improvement, which is another disadvantage.

3. For the bearing 82 and the rotating shaft 83 as the fulcrum, the cost of using the actuator 80 is still high, which increases the manufacturing cost. At the same time, the maintenance and replacement after wear require a higher cost, which is a conventional design. Another disadvantage.

In addition, there is still a conventional way to replace the above-mentioned bearing as a fulcrum. It uses a square shrapnel as the torsion shaft. The cost can be reduced. However, because the simple rectangular shrapnel is twisted from left to right, there is no fixed one. The fulcrum makes the position of the fulcrum on the shrapnel move around every time the oscillating member swings. Although the cost can be reduced, the position of the fulcrum cannot be fixed during the swing, which often changes the rotation axis of the shrapnel, causing the projection position Inability to control is the main disadvantage. In addition, as long as the angles of the two ends are slightly deviated when the shrapnel is assembled, the rotation axis cannot be in the same straight line, and the projection position is still easy to deviate, which is another major disadvantage.

The main purpose of the present invention is to provide a special suspension shrapnel to become the main shaft of the suspension system. The suspension shrapnel is designed as a frame-shaped body, and a cantilever is protruding from two opposite ends through cut edges and turning parts. There is a magnetic device on one side of the suspended shrapnel, and at the same time, it is erected by a cantilever above a reinforcing frame, which can carry an optical lens. When the actuator uses a connector to pass current to the magnetic device, the side of the suspended shrapnel can be Generate repeated adsorption or repulsion forces to make the suspended elastic piece itself form a swinging piece, while taking the virtual axis between the two turning parts on the frame as the axis, since the turning part serves as the deflection fulcrum of the suspended elastic piece, The positioning is very clear and precise. According to this, the optical lens can be mounted on both sides to produce rapid limit swings, to achieve precise positioning of the light and easy to assemble, which are the characteristics of the present invention.

In order to achieve the above objective, the present invention will be achieved by the following first embodiment: at least including: a base with a square light-transmitting hole in the center, and on opposite sides of the diagonal of the light-transmitting hole Each protrusion is provided with a pillar, and a set of magnetic devices is provided beside one long side of the square light-transmitting hole, and a connector is provided at the end of the base; a reinforcing frame is provided under the base and in the center A light-transmitting hole is provided, and a supporting piece and an insert piece protruding from one side of the light-transmitting hole, which pass through the base, are used to fix the magnetic device; a suspension spring piece is a flat metal piece with a frame A light-transmitting hole is formed in the center, and two opposite sides of the diagonal of the frame are respectively provided with a cut edge, and a turning part is formed from the outside of the cut edge, and the frame is protruded toward the outside to form a cantilever; The cantilever has a space between the inner side and the outer side of the cut edge; a swinging piece is a plastic bearing platform with a light-transmitting hole in the center, and a mirror groove is provided on the inner edge of the light-transmitting hole for carrying and embedding Fixing the optical lens; the two fixing parts respectively penetrate through the two ends of the suspension shrapnel to protrude from the outer end of the cantilever, and then are respectively locked on the two pillars of the base, so that the suspension shrapnel and the swinging piece can carry the optical lens. Two-terminal The fixing piece is a fulcrum, and the swinging piece with the optical lens is placed above the light-transmitting hole of the base, and the magnetic device is used to make the two sides of the swinging piece swing quickly.

In order to achieve the above objective, the present invention will be achieved by the following second embodiment: at least provided with: a suspension elastic sheet, which is a flat metal sheet, has a frame with a light-transmitting hole formed in the center, and the frame is opposed to The two opposite sides of the corner line are respectively provided with a cut edge, and a turning part is formed from the outside of the cut edge, and the frame is protruded toward the outside to form a cantilever, and the two cantilevers extend outward to form a two elongated body and the frame. The sides are parallel, and the side of the frame body opposite to one of the cantilever arms is formed with a concave assembly groove, and a magnetic device is provided on the assembly groove, and a connector is connected; the light transmission of the frame body An insert is punched around the hole, so that the frame and the inserts can carry the optical lens to form a swinging piece; a reinforcing frame is arranged above the suspended shrapnel, and a light-transmitting hole is provided in the center. The reinforcement frame is provided with a pillow plate at each end for the cantilever of the suspended shrapnel to be fixed; the reinforcement frame is provided with an insert and a supporting piece on the inner and outer sides of a pillow plate to fix the magnetic device; Therefore, the suspension shrapnel is fixed inside the reinforcement frame with two cantilever ends. When the connector is supplied with current to the magnetic device, the virtual axis between the two turning parts on the frame is taken as the axis, and the two cantilever The side has a rapid limit swing.

〔this invention〕

10: Pedestal

11: light hole

111: jack

12: Pillar

121: positioning mark

122: positioning baffle

13: Pillar

131: Location mark

132: Positioning baffle

14: Magnetic device

141: Coil

142: Magnet

15: Connector

16: fixed parts

20: Reinforcement frame

200: light hole

21: Support piece

22: Insert

30: Suspended shrapnel

31: Frame

310: light hole

31A: trimming

31B: Turning part

31C: Cantilever

31D: Reinforcement Department

31E: Constriction

31F: Figure arc chamfer

32: Nail hole

33: Insert groove

34: positioning part

40: swing parts

401: The upper seat

402: Under Seat

41: light hole

42: mirror groove

50: Optical lens

51: Optical lens

60: Suspended shrapnel

61: Frame

610: light hole

61A: trimming

61B: Turning part

61C: Cantilever

61D: Reinforcement Department

61E: Constriction

61F: Figure arc chamfer

61G: Embedded buckle flap

61H: Embedded buckle flap

61I: Embedded buckle flap

61J: Embedded buckle flap

62: assembly slot

63: swing parts

631: inlaid lens

632: inlaid lens

633: inlaid lens

634: inlaid lens

70: reinforcement frame

701: Pillow

702: Pillow

700: light hole

71: Insert

72: support piece

73: Magnetic device

74: Connector

S: Spacing

L2: Virtual axis

L3: Virtual axis

[Traditional]

80: Actuator

801: assembly slot

81: Pedestal

82: Bearing

83: shaft

84: swing parts

841: Stage

842: lens

90: lens

91: Secret

92: microchip panel

L1: axis

Figure 1 is an exploded view of the first embodiment of the present invention.

Figure 2 is a combined diagram of the first embodiment of the present invention.

Figure 3 is a diagram of the relationship between the suspension shrapnel, the swinging member, and the optical lens of the first embodiment of the present invention.

Figure 4 is a plan view of the suspension shrapnel of the first embodiment of the present invention.

Figure 5-1 is a three-dimensional structural view of the suspension shrapnel of the first embodiment of the present invention.

Figure 5-2 is a schematic diagram of the action of the suspended shrapnel of the first embodiment of the present invention.

Figure 6 is a plan view of the suspension shrapnel of the second embodiment of the present invention.

Figure 7-1 is a three-dimensional structural view of the suspension shrapnel of the second embodiment of the present invention.

Figure 7-2 is a schematic diagram of the action of the suspended shrapnel of the second embodiment of the present invention.

Figure 8 is a combined diagram of the second embodiment of the present invention.

Figure 9 is an exploded view of the second embodiment of the present invention.

Figure 10 is another perspective view of the second embodiment of the present invention.

Fig. 11 is a schematic diagram 1 of the optical actuator application description.

Figure 12 is a schematic diagram 2 of the optical actuator application description.

Figure 13 is a three-dimensional structure diagram of a conventional uniaxial optical actuator.

Figure 14 is a plan view of Figure 11.

Figure 15 is the A-A cross-sectional view of Figure 12.

Please refer to Figures 1 and 2, which is the first embodiment of the application of the suspension system of the single-axis optical actuator of the present invention. It at least includes a base 10 with a light-transmitting hole 11 in the center. The light-transmitting hole 11 roughly forms a square, and on an opposite side of the light-transmitting hole 11, a pillar 12, 13 respectively protrudes, and the two pillars 12, 13 are provided with positioning marks 121, 131 (the present invention is The positioning tenon is an embodiment), and a positioning baffle 122, 132 is provided on the other side, and a set of magnetic devices 14 (composed of coils and magnets) is provided beside a long side of the light-transmitting hole 11. The end is provided with a connector 15.

A reinforcing frame 20, preferably metal, is arranged under the base 10, and is provided with a light-transmitting hole 200 in the center, and a supporting sheet 21 and an inserting sheet 22 protruding from one side of the light-transmitting hole 200 , It passes through the base 10 to fix the magnetic device 14; one of the specific implementations is that a hole 111 is provided at the base 10 where the magnetic device 14 is provided, and the insert 22 of the reinforcing frame 20 passes through , And the supporting sheet 21 is pressed against the side of the base 10, and accordingly the coil 141 and the magnet 142 of the fixed magnetic device 14 are inserted and fixed.

Please refer to Figures 1 and 4, a suspension elastic piece 30, which is a flat metal piece, has a frame 31 with a light-transmitting hole 310 formed in the center. The frame 31 is provided on two opposite sides of the diagonal There is a cut edge 31A, and a turning portion 31B is formed from the outside of the cut edge 31A, and the frame body 31 protrudes toward the outside to form a cantilever 31C. A necked portion 31E is formed at the inner end of the cantilever 31C near the turning portion 31B, A nail hole 32 is pierced at the outer end; in order to enable the turning portion 31B to withstand greater stress, it can be thickened at a place where stress is easy to concentrate to form a reinforcing portion 31D; the cantilever 31C of the protruding frame 31 is inside There is a gap S between the side edge and the outer edge of the cut edge 31A. The embodiment of the present invention shown in the figure is that the inner edge of the cantilever 31C is parallel to the outer edge of the cut edge 31A, and the turning portion 31B is The inner edge is formed as a curved chamfer 31F; in addition, a number of recessed grooves 33 are provided on the periphery of the frame body 31, and a positioning portion 34 is provided on one side of the cantilever 31C, and an embodiment of the positioning portion 34 For a groove.

Please refer to Figures 1, 2 and 3, a swinging member 40 is a plastic bearing platform with a light-transmitting hole 41 in the center, and a lens-receiving groove 42 is provided on the inner edge of the light-transmitting hole 41 to support and embed optics. Lens 50; the swing member 40 can be integrated into the suspension elastic piece 30 in an integrated manner, the suspension elastic piece 30 at the periphery of the frame 31 in the groove 33 can have a better bite force with the swing member 40, and Make the cantilever 31C of the suspension spring 30 protrude out of the swing member 40; but one of the preferred embodiments of the swing member 40 is integrally formed, but it can also be divided into two parts as shown in the third figure, namely One upper 401 and lower 402 Constituted.

In use of the present invention, please refer to Figures 1, 2, and 5-2. Take two fixing members 16 respectively penetrate through the nail holes 32 of the two ends of the suspension spring 30 protruding from the outer end of the cantilever 31C, and then respectively lock them (for example: screw The two pillars 12 and 13 of the base 10 so that the swing member 40 covered on the suspension spring 30 can carry the optical lens 50, and the suspension springs The fixing member 16 at the two ends of 30 is the fulcrum, and the swing member 40 with the optical lens 50 is placed above the light-transmitting hole 11 of the base 10; when the connector 15 is energized, the magnetic device 14 on the base 10 is attracted Or repulsive action, the side end of the swing member 40 is attracted or repelled by the magnetic force of the magnetic device 14, and the swing member 40 is (as shown in Figures 2, 4, and 5-2) on the second turning portion 31B The virtual axis L2 between the deflection points is the axis, which causes the two sides of the swing member 40 to swing rapidly.

The ingenuity of the present invention, as shown in Figures 4, 5-1, and 5-2, the two ends of the suspension elastic piece 30 protruding from the cantilever 31C and the cut edge 31A of the frame body 31 form an acute bend, and when the two cantilevers When 31C and the frame 31 are twisted relative to each other, the turning portion 31B is the fixed fulcrum, and this fulcrum is constrained to a fixed position due to the arc formed by the cantilever 31C and the cut edge 31A of the frame 31 It is not easy to deviate and move, so that the rotation angle of each repetitive swing of the swing member 40 is accurately fixed, so that the position of the light projected by the actuator can be very accurate, so that the resolution and stability of the projection are better.

As shown in Figures 1 and 2, in order to allow the suspension spring 30 and the swing member 40 to be erected between the two pillars 12 and 13 of the base 10 for more accurate light projection positions, the suspension spring 30 is outside the cantilever 31C The side edge is formed as a straight edge, and it just abuts against the positioning baffle 122, 132 for precise positioning. Furthermore, the positioning part 34 (for example: groove) on the cantilever 31C can be suspended by the elastic piece 30, and the base The positioning marks 121 and 131 on the two pillars 12 and 13 of the seat 10 are relatively aligned, which can also obtain better assembly precision. Accuracy.

The above-mentioned first embodiment of the present invention is mainly developed for one of the current common specifications (for example: 0.33mm micro-projection panel, or similar to DMD, etc.), but when assembled in another existing common specification (for example: 0.23 mm micro-projection panel, or similar to DMD, etc.), it can still be achieved with the features of the present invention. Please refer to Figures 6, 7-1, 7-2, 8, and 9, the suspension spring 60 is A flat metal sheet with a frame 61 with a light-transmitting hole 610 formed in the center. The frame 61 is provided with a cut edge 61A on the two opposite sides of the diagonal line, and a turning part is formed from the outside of the cut edge 61A 61B, and protrude the frame 61 toward the outside to form cantilevers 61C, 61C'. The cantilever 61C, 61C' is formed with a necked portion 61E close to the turning portion 61B, but the two cantilevers 61C, 61C' are It extends outward to form two elongated bodies and is parallel to the sides of the frame 61, and at the ends of the two cantilevers 61C, 61C', there are embedding flaps 61G, 61H, 61I, 61J, and the frame 61 and one of the cantilevers 61C The opposite side is formed with a concave assembly groove 62, a magnetic device 73 is provided on the assembly groove 62, and a connector 74 is connected; in order to enable the turning portion 61B to withstand greater stress, Where the stress is easy to concentrate, the thickness and width can be increased to form the reinforcing part 61D; the inner edge of the turning part 61B is formed as a curved chamfer 61F; and an insert 631, 632, 633, 634 is punched around the transparent hole 610 of the frame 61, The frame 61 and the inserts 631, 632, 633, 634 (as shown in FIGS. 7-2, 8 and 9) can carry the optical lens 51 to form a swinging member 63.

Please refer to Figures 8, 9 and 10, a reinforcing frame 70, especially metal, is attached to the top of the suspension shrapnel 60, with a transparent hole 700 in the center, and the reinforcing frame 70 is at the two ends. A pillow plate 701, 702 is respectively provided for suspending the shrapnel 60 and the embedding flaps 61G, 61H, 61I, 61J of the cantilever 61C, 61C' are pressed and fastened; the reinforcing frame 70 is located on the inner and outer sides of a pillow plate 701 Each punch is provided with an inserting piece 71 and a supporting piece 72 for fixing the magnetic device 73; one of the specific embodiments, (please refer to See Figures 9 and 10) The insert 71 is inserted into the coil 731 of the magnetic device 73, and the support piece 72 is pressed against the side of the magnet 732, and the magnetic device 73 is fixed to the reinforcing frame 70 accordingly. And the suspension shrapnel 60 between.

When the second embodiment of the present invention is in use, please refer to Figures 7-2, 9, and 10. As the suspension spring 60 uses two cantilever 61C, 61C' end embedding flaps 61G, 61H, 61I, 61J It is erected inside the reinforcing frame 70. When the connector 74 passes current to the magnetic device 73, the end of the frame 61 of the suspension spring 60 is attracted or repelled by the magnetic force of the magnetic device 73, that is, the frame 61 The virtual axis L3 between the two turning parts 61B on the upper part is the axis, which makes the two sides of the frame 61 produce rapid limit swing, because the frame 61 and the inserts 631, 632, 633, 634 carry the optical lens 51, that is, the light can be Fast swing of positioning.

Since the design of the present invention is ingenious, it has the following advantages in use and manufacturing:

1. Due to the design of the suspension system of the present invention, the suspension shrapnel adopts a large metal frame to carry the optical lens, but there are turning parts on the two diagonals of the frame and then the cantilever is extended. When one end of the suspended shrapnel is adsorbed or repelled, the suspended shrapnel can take the virtual axis between the two turning parts on the frame as the axis, which can make the optical actuator perform a very precise two-angle displacement. The angle is accurate and durable. The main advantages of the present invention.

2. Because the suspension shrapnel of the present invention is punched out of a large piece of metal, it is not only easier to manufacture, but also more reliable and convenient for overall assembly, and the matching and movements between the swinging parts are easier and replacement It can also be accurately positioned, does not occupy space, and facilitates storage control, which is another advantage of the present invention.

However, the above-mentioned structure is only a preferred embodiment of the present invention, and It is not used to limit the scope of the implementation of this creation; therefore, if you are familiar with the equivalent or easy changes made by this technique, make equal changes and modifications without departing from the spirit and scope of the creation, such as roughly changing the shape of components or The size or shape of the suspended shrapnel is slightly changed, or different materials are used, or used in different projection occasions, etc., but those that use the features of the present invention should be covered by the features of the present invention.

51‧‧‧Optical lens

60‧‧‧Suspended shrapnel

61‧‧‧Frame

61I‧‧‧Inlay clasp flap

61J‧‧‧Inlay buckle flap

634‧‧‧Inlaid lens

70‧‧‧Reinforcement frame

701‧‧‧pillow

702‧‧‧pillow

700‧‧‧Light hole

71‧‧‧Insertion

731‧‧‧Coil

74‧‧‧Connector

Claims (10)

A suspension system of a single-axis optical actuator at least includes: a base with a light-transmitting hole in the center, and a pillar protruding from an opposite side of the light-transmitting hole, and One side of the hole is provided with a set of magnetic devices, and a connector is provided at the end of the base; a reinforcing frame is set under the base, and a light-transmitting hole is provided in the center, and one side of the light-transmitting hole A supporting piece and an insert piece are protruding out of the base to fix the magnetic device; a suspension spring piece, a flat metal piece, has a frame with a light-transmitting hole in the center, and the frame is diagonal The two opposite sides are respectively provided with a cut edge, and a turning part is formed from the outside of the cut edge, and the frame is protruded toward the outside to form a cantilever; the cantilever is left between the inside edge and the outside edge of the cut edge There is a gap; a swinging piece, which is a plastic bearing platform with a light-transmitting hole in the center, and a lens groove on the inner edge of the light-transmitting hole for supporting and fixing the optical lens; and the swinging piece and the suspension shrapnel Combined into one body, and make the cantilever of the suspension shrapnel protrude beyond the swinging piece; the two fixing pieces respectively penetrate through the two ends of the suspension shrapnel to protrude the outer end of the cantilever, and then are respectively locked on the two pillars of the base to make the suspension The elastic piece and the swinging piece can carry the optical lens, and the two ends of the suspension elastic piece are respectively supported, and the swinging piece with the optical lens is placed above the transparent hole of the base. Under the action of the magnetic device, the The oscillating member takes the virtual axis between the deflection points on the two turning parts of the suspending shrapnel as an axis, so that the two sides of the oscillating member can swing rapidly. According to the suspension system of the single-axis optical actuator described in item 1 of the scope of patent application, the two pillars on the base are provided with positioning marks and positioning baffles that match the suspension shrapnel. According to the suspension system of the single-axis optical actuator described in item 2 of the scope of patent application, the positioning mark of the two pillars on the base is a positioning tenon, and the suspension spring is provided with a positioning recess opposite to the tenon groove. According to the suspension system of the single-axis optical actuator described in item 1 of the scope of patent application, the cantilever of the suspension spring sheet is formed with a necked part at the inner end close to the turning part, and a nail hole is penetrated at the outer end. According to the suspension system of the single-axis optical actuator described in the first item of the scope of patent application, the inner side of the cantilever of the suspension spring is parallel to the outer side of the cut edge of the light-transmitting hole. According to the suspension system of the single-axis optical actuator described in item 1 of the scope of patent application, the frame of the suspension spring is provided with a number of recessed grooves. A suspension system for a single-axis optical actuator at least includes; a suspension spring sheet, which is a flat metal sheet, has a frame and a light-transmitting hole is formed in the center, and the two diagonal sides of the frame are respectively Each side is provided with a cut edge, and a turning part is formed from the outside of the cut edge, and the frame is protruded toward the outside to form a cantilever, and the two cantilevers extend outward to form a two elongated body and parallel to the sides of the frame, and the frame A concave assembly groove is formed on the side opposite to one of the cantilever arms. A magnetic device is provided on the assembly groove, and a connector is connected; and an insert is punched around the light-transmitting hole of the frame. The frame body and the inserts can carry the optical lens to form a swinging piece; a reinforcing frame is arranged above the suspension shrapnel, and a light-transmitting hole is provided in the center, and the reinforcing frame is provided at each end There is a pillow plate for the cantilever of the suspended shrapnel to be fixed; the reinforcing frame is punched on the inner and outer sides of a pillow plate with an insert and a supporting piece to fix the magnetic device; Thereby, the suspension shrapnel is fixed inside the reinforcement frame with two cantilever ends. Under the action of the magnetic device, the virtual axis between the deflection points on the two turning parts of the suspension shrapnel is the axis, so that the two sides produce rapid The limit swing. According to the suspension system of the single-axis optical actuator described in item 7 of the scope of patent application, the two cantilever arms of the suspension spring sheet extend outward to form two elongated body ends, and are further provided with embedding fins. According to the suspension system of the uniaxial optical actuator described in item 7 of the scope of patent application, the insert piece of the reinforcing frame is inserted into the coil of the magnetic device, and the supporting piece is against the side of the magnet. According to the suspension system of the single-axis optical actuator described in item 7 of the scope of patent application, the cantilever of the suspension spring sheet is formed with a necked part at the inner end near the turning part.

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