TWI656373B - Suspension system for two-axis optical actuator - Google Patents

Abstract

A suspension system for a biaxial optical actuator includes a circuit base and a swinging member, the swinging member is provided with an optical lens in the middle; and a suspended elastic piece is coupled with the swinging member, and the hanging The elastic piece is respectively disposed at four corners and protrudes from the swinging member. The elastic unit cooperates with the pillar to suspend the hanging elastic piece and the swinging member above the base, and a magnetic device is disposed around the swinging member. When the four magnetic devices take the opening and closing of the magnetic force in turns, the oscillating members carrying the optical lenses are respectively the virtual axes of the suspended elastic pieces (this virtual axis corresponds to the pair of opposite magnetic devices as the rotation axis) The swinging member performs a fixed time difference and a precise two-axis swing motion, and the projection light quickly generates light spots at four different positions, so that the resolution of the projection is greatly improved.

Description

Suspension system for two-axis optical actuator

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a suspension system for a biaxial optical actuator, and more particularly to a suspension system suitable for use in an optical actuator of a projection apparatus, having a swing characteristic in a biaxial direction, which enables the actuator to swing more. For stability and accuracy, the resolution and stability of the projection are greatly improved.

The more advanced optical projection system is not only required to be compact, but also the resolution of the projection is good, and the cost is reduced. Under these three pre-requisites, the design of the more advanced optical projection system, please refer to the 11th As shown in FIG. 12, the image of the microchip panel 92 (for example, DMD) is projected through the 稜鏡91, the actuator 80, and the lens 90 to the projection screen (not shown); The lens is passed through the actuator 80 and subjected to rapid repetitive vibration (changing the projection position) via the actuator 80, by constantly changing the position of the image to increase the resolution.

However, a conventional structure of the conventional actuator 80, as shown in Figs. 13, 14, and 15, has a base 81, and a square assembly groove 801 is provided in the center of the base 81, and the assembly groove 801 is opposed to each other. The position is further provided with a bearing 82 and a rotating shaft 83. A swinging member 84 is disposed between the two rotating shafts 83. The swinging member 84 is composed of a loading base 841 and a lens 842, so that the actuator is on the peripheral side. Under the electromagnetic action (not shown), the swinging member 84 can be driven by the axis L1 between the two bearings 82 and the rotating shaft 83 as a base line, and the two sides of the moving swinging member 84 are swinged up and down to change the position of the projection. Yes The most common way to use it.

The shortcomings of the conventional actuator 80 structure are fully described by the inventor of the Japanese Patent Application No. 105135962 (i.e., U.S. Patent Application No. 15/415,891, the entire disclosure of which is hereby incorporated by reference in These structures are still two-point swings with a single axis L1 as the baseline. If you want to improve the resolution, it is necessary to design a multi-point tilting spot to take the resolution of the projection to a higher level. In addition to the ingenuity of the structure, the actuator must maintain the accuracy and stability of the multi-point moving spot. This technique has been difficult in the past, and the industry has been eager to break through. At the office.

The main object of the present invention comprises: providing a circuit base and a swinging member, wherein the swinging member is provided with an optical lens in the middle; and a hanging elastic piece is coupled with the swinging member, and the suspended elastic piece is in four corners. Each of the elastic unit protrudes from the swinging member, the elastic unit cooperates with the pillar to make the suspended elastic piece and the swinging member are erected above the base, and a magnetic device is disposed around the swinging member, and the four magnetic devices are When the magnetic force is turned on and off in turn, the oscillating members carrying the optical lenses are respectively virtual axes formed by the central bisectors of the four side lengths of the suspended elastic pieces (this virtual axis corresponds to the magnetic connection of the two opposite magnetic devices) As the axis of rotation, the oscillating member is fixed for a fixed time difference and precise oscillating motion, and the projected light quickly generates light spots at four different positions, so that the resolution of the projection is greatly improved, and the optical actuation of the two-point light spot is more conventional. The device can greatly increase the resolution.

In order to achieve the above object, the present invention can be achieved in the following manner: a base is provided, the base is provided with a light transmission hole at the center; and a circuit board is provided with a light transmission hole corresponding to the base at the center; a swinging member is an annular structure with a square formed in the middle a middle hole, a stepped mirror groove is formed around the middle hole, and is disposed by an optical lens; a suspended elastic piece has a frame body, and a light transmission hole is formed in a center of the frame body, and the frame body is further Each of the four corners is provided with an elastic unit, and the outermost ring of the elastic unit is provided with a bent outer ring frame, and a support handle is formed at the center thereof, and the outer ring frame extends from the support side along the two sides of the frame body Forming a first cantilever, and forming a bent portion at each end of the first cantilever, and a second cantilever is formed parallel to the first cantilever, and is provided inward at the end of the second cantilever The arm is connected to the frame body; the four magnetic devices are disposed at the central position of the four outer sides of the oscillating member, and the electromagnetic force can closely control the movement of the oscillating member; the sling is swayed The combination is combined with the first locking component to join the suspension elastic piece with the swinging component; the second locking component passes through the outermost end of the suspension elastic piece, and is fixed to the base through the circuit board and a pillar. On the seat, so that the suspended elastic piece can drive the swinging piece, and is loaded with magnetic force Actuation and precise positioning of the multi-point pivot.

〔this invention〕

10‧‧‧ Pedestal

11‧‧‧Light hole

12‧‧‧Magnetic aperture

20‧‧‧ boards

21‧‧‧Light hole

22‧‧‧Magnetic aperture

30‧‧‧Swinging parts

30’‧‧‧Swinger

31‧‧‧上上

311‧‧‧Medium hole

312‧‧‧Magnetic magnetic slot

32‧‧‧The lower seat

321‧‧‧中孔

322‧‧‧Magnetic magnetic slot

33‧‧‧Medium hole

34‧‧‧Inspected mirror slot

35‧‧‧Magnetic tank

40‧‧‧ Suspended shrapnel

40A‧‧‧elastic unit

401‧‧‧ outer ring frame

402‧‧‧Support

4021‧‧‧Fixed holes

403‧‧‧First cantilever

404‧‧‧Bending

405‧‧‧second cantilever

406‧‧‧ 接臂

41‧‧‧Box body

42‧‧‧Light hole

43‧‧‧Magnetic magnetic slot

44‧‧‧Keyhole

50‧‧‧Optical lenses

60‧‧‧ magnetic device

70‧‧‧First locking assembly

71‧‧‧Second locking assembly

711‧‧ ‧ pillar

800‧‧‧Actuator

D1‧‧‧寛

D2‧‧‧寛

D3‧‧‧寛

D4‧‧‧寛

L2‧‧‧ length

L3‧‧‧ length

Lx‧‧‧ axis

Ly‧‧‧ axis

Lt‧‧‧Light

[Use]

80‧‧‧ actuator

801‧‧‧assembly slot

81‧‧‧Base

82‧‧‧ bearing

83‧‧‧ shaft

84‧‧‧Swinging parts

841‧‧‧ stage

842‧‧‧ lenses

90‧‧‧ lens

91‧‧‧稜鏡

92‧‧‧Microchip panel

L1‧‧‧ axis

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

Figure 2 is a combination diagram of an application embodiment of the present invention.

Figure 3 is an exploded view of the suspension system of the present invention.

Fig. 4 is a plan view showing the structure of the suspension shrapnel of the present invention.

Figure 5 is a schematic view showing the operation of the suspension shrapnel of the present invention.

Figure 6-1 is a schematic view of the swinging of the suspension bearing piece of the present invention.

Figure 6-2 is a schematic view of the suspension of the suspension elastic piece driving the carrier of the present invention.

Figure 7-1 is a schematic diagram 1 of the overall operation of the application embodiment of the present invention.

Figure 7-2 is a schematic diagram 2 of the overall operation of the application embodiment of the present invention.

Figure 7-3 is a schematic diagram 3 of the overall operation of the application embodiment of the present invention.

Figure 7-4 is a schematic diagram 4 of the overall operation of the application embodiment of the present invention.

Figure 8 is a view showing another embodiment of the suspension elastic sheet of the present invention combined with the carrier.

Fig. 9 is a view showing an application example of the present invention.

Figure 10 is a diagram of an application embodiment of the present invention.

Figure 11 is a schematic diagram 1 of an optical actuator application.

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

Figure 13 is a perspective view of a conventional uniaxial optical actuator.

Figure 14 is a plan view of the structure of Figure 11.

Figure 15 is a cross-sectional view taken along line A-A of Figure 12.

Referring to FIGS. 1 and 2, an embodiment of the suspension system application of the biaxial optical actuator of the present invention includes at least a base 10 having a square transparent hole 11 at the center. And a magnetic hole 12 is provided in each of the four bisectors of the four periphery of the light transmission hole 11.

A circuit board 20 is provided at the center with a light-transmissive hole 21 having four peripheral portions corresponding to the periphery of the light-transmitting hole 11 of the base 10 and at the periphery of the light-transmitting hole 21 Each of the central bisector points is provided with a magnetic flux hole 22; the circuit board 20 is further provided with a plurality of through holes 23, and the through holes 23 are used to avoid other parts (for example, locking screws). The through hole 23 disclosed in the embodiment is formed by extending along four squares of the light transmission hole 11; The circuit board 20 is placed on the carrying surface of the base 10.

A oscillating member 30, as shown in the first and third figures, is composed of a top seat 31 and a lower seat 32. The upper seat 31 and the lower seat 32 are an annular structure body, and a square hole 311, 321 is formed in the middle. And a magnetic flux groove 312, 322 is disposed at a central bisector of the periphery of the middle hole 311, 321; the middle hole 311 of the upper seat 31 is slightly larger than the middle hole 321 of the lower seat 32, and the two middle holes 311, 321 A stepped mirror groove 34 is formed (as shown in Figs. 1 and 8) and placed in an optical lens 50.

Referring to Figures 3 and 4, a suspension spring 40 has a frame body 41. The frame body 41 is provided with a plurality of keyholes 44, and a magnetic flux groove is disposed on each of the four side bisectors. The frame body 41 is formed with a light-transmissive hole 42 at the center, and an elastic unit 40A is disposed at each of the four corners of the frame body 41, and the outer ring of the elastic unit 40A is provided with a 90-degree outer ring frame 401. A shank 402 is formed in the center, and the shank 402 is provided with a fixing hole 4021, and the outer ring frame 401 extends from the shank 402 along the two sides of the frame body 41 to form a first cantilever 403, and The end of a cantilever 403 is further bent 90 degrees inwardly to provide a bent portion 404, and a second cantilever 405 is formed parallel to the first cantilever 403, and an arm is provided inward at the end of the second cantilever 405. 406, the arm 406 is further connected to the frame body 41.

In the above, the length L2 of the first cantilever 403 is longer than the length L3 of the second cantilever 405 to be more elastic; in the preferred embodiment of the present invention, the first cantilever 403 has a twist D1 and a The twist D2 of the second cantilever 405 is the same, and the twist D1 of the entire first cantilever 403 and the twist D2 of the entire second cantilever 405 are kept the same, that is, the first cantilever 403 and the second cantilever 405 are equal. The cantilever of the diameter, but if it is required by the force, the first cantilever 403 and the second cantilever 405 can also be designed to have different twists or unequal diameters, but the equivalent changes of the force changes are And knot The structure is irrelevant, that is, it will not be described; if the twists D3 and D4 of the bent portion 404 and the arm 406 are more than the twists D1 and D2 of the first cantilever 403 and the second cantilever 405, Better support and fatigue strength is obtained. Conversely, if the twist D3 of the bent portion 404 and the arm 406 is D4, the D4 is narrower than the twists D1 and D2 of the first cantilever 403 and the second cantilever 405. , the best elasticity can be obtained, but it needs to be adjusted according to the characteristics of the material. However, the inevitable changes made by the changes of the force of these materials are irrelevant to the structural features, and will not be described again.

Referring to Figures 1, 2, 3, and 4, four magnetic devices 60 are disposed at the center of the four outer sides of the oscillating member 30, and the magnetic flux grooves 312, 322 of the oscillating member 30 and the base 10 are The magnetic flux hole 12, the magnetic flux hole 22 of the circuit board 20, and the magnetic flux groove 43 of the suspended elastic piece 40 are all oppositely arranged for the four magnetic devices 60 to be accommodated therein for electromagnetic force to control the close-range swinging member. The movement of 30; since the four magnetic devices 60 are disposed at the central position of the four outer sides of the swinging member 30, the relative virtual connection at the center of the outer side of the suspended elastic piece 40 (i.e., the relative magnetic force of the two pairs) The device 60 is equally connected to the two points of rotation, that is, the two virtual axes of rotation Lx, Ly of the oscillating member 30.

Referring to Figures 1, 2 and 3, the suspension elastic piece 40 is placed between the upper seat 31 and the lower seat 32 of the swinging member 30, and the suspension elastic piece 40 is combined with the swinging member 30 by the first locking assembly 70. The second locking component 71 passes through the shank 402 of the outermost end (ie, four corners) of the suspension spring 40, and is then fixed to the pedestal 10 through the through hole 23 of the circuit board 20 and a post 711. In the above, the suspension elastic piece 40 can drive the swinging member 30 to swing.

When the present invention is used, please refer to the figures 1, 5, 6-1, and 7, because the four elastic units 40A of the suspended elastic piece 40 protrude from the swinging member 30, and the outermost end is supported. The handle 402 is a fulcrum, and the suspension elastic piece 40 and the swinging member 30 are mounted on the base 10 and the circuit board 20 in cooperation with the support 711. Therefore, when the four magnetic devices 60 are magnetically attracted by different time differences, For the description of the action of the attracted end, please refer to Figure 6-1 first. If the rotation axis Ly is centered and rotated clockwise, the position (such as the white arrow in Figure 6-1) can be In the two-side elastic unit 40A that the magnetic device 60 is attracted downward, the second cantilever 405 and the arm 406 on the outermost two-end side are displaced downward by the magnetic force, and generate the relative elastic force with the bent portion 404 and the first cantilever 403. At this time, the magnetic device 60 on the opposite side (black arrow) is upwardly attracted, so that the second cantilever 405 and the arm 406 on the outermost two end sides of the elastic unit 40A on both sides are displaced upward by the magnetic force. And the elastic force is generated in relation to the bent portion 404 and the first cantilever 403; on the other hand, if the rotation axis Ly is centered and rotated counterclockwise, the left end of the sixth figure (the white arrow) is made. The second cantilever 405 and the arm 406 on the outermost two end sides of the two sides are attracted downward by the magnetic device 60 and are attracted downward by the magnetic device 60, and the second cantilever 405 and the arm 406 are displaced downward by the magnetic force, and the bent portion 404 And the first cantilever 403 generates a relative elastic force, and at this time, the magnetic force on the opposite side (black arrow) 60, the upward attraction is such that the second cantilever 405 and the arm 406 on the outermost two end sides of the elastic unit 40A on both sides are upwardly displaced by the magnetic force, and are opposite to the bent portion 404 and the first cantilever 403. Elasticity.

Therefore, the embodiment of the overall operation of the present invention can be decomposed into four, that is, (1) when the rotation axis Ly shown in FIG. 7-1 is rotated in the clockwise direction, the swinging member 30 can carry the optical lens 50. The magnetic device 60 on the right side of the rotation axis Ly is deflected and positioned downward; (2) when the rotation axis Lx shown in FIG. 7-2 is rotated in the clockwise direction, the swinging member 30 can be rotated by the optical lens 50. The magnetic device 60 on the right side of the axis Lx is deflected and positioned downward; (3) when the rotation axis Ly shown in FIG. 7-3 is rotated in the counterclockwise direction, the swinging member 30 can carry the optical lens 50 toward the rotation axis Ly The magnetic device 60 on the left side is deflected and positioned downward; (4) when the rotation axis Lx shown in FIG. 7-4 is rotated in the counterclockwise direction, the swinging member 30 can carry the optical lens 50 to the left of the rotation axis Lx. The magnetic device 60 is deflected downwardly; that is, when the four magnetic devices 60 take a change in the rotation interval In the direction of the magnetic force, the suspension elastic piece 40 and the oscillating member 30 can carry the optical lens 50 with the two rotation axes Lx and Ly as axes, and perform specific time difference and fixed displacement at four positions, so that the projection light is caused. Under the control of the actuator, there are four light spots at different positions, which greatly increases the resolution of the projection.

In the embodiment shown in Fig. 3 of the present invention, the swinging member 30 is composed of a top seat 31 and a lower seat 32, and the suspended elastic piece 40 is embedded in the center; however, in an equivalent replacement application, The upper seat 31 and the lower seat 32 of the oscillating member 30 may also be integrally formed, and the suspension elastic piece 40 is embedded on the central plane of the oscillating member 30; again, as shown in Fig. 8, it is a simpler method, that is, For the integrally formed oscillating member 30', a central hole 33 having a mirror groove 34 is disposed at the center to carry the optical lens 50, and a magnetic flux groove 35 is also provided at four periphery, and the suspended elastic piece 40 is first locked. The solid component 70 is locked under the swinging member 30' and is also a relatively simple combination.

The present invention can be widely applied to the case of the first and fourth embodiments. In the case of the ninth embodiment, the actuator 800 of the present invention passes through the cymbal 91 and the microchip panel in the image light ray Lt. After 92 (for example: DMD), the actuator 800 constructed by the present invention rapidly deflects the light at multiple angles and directly projects into the projection screen (not shown) of the lens 90; or as shown in Fig. 10. In this case, after the image light Lt passes through the crucible 91 and the microchip panel 92 (for example, DMD), the actuator 800 constructed by the present invention deflects the light at multiple angles, and then passes through the reflection of the crucible 91. It is then in the projection screen (not shown) of the lens 90; these various forms of projection are well suited for the application of the present invention.

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

1. Since the present invention is applied to a biaxial optical actuator, a conventional single-axis two-point position is used. The shift, which is greatly improved in resolution, is a major advantage of the present invention.

2. Due to the design of the suspension system of the present invention, it is another advantage of the present invention to provide a highly precise four-angle displacement of the optical actuator with a large suspension of the elastic pieces in four corners.

3. Since the suspension shrapnel of the present invention is made of a large piece of metal, it is not only simpler to manufacture, but also the overall assembly is more reliable and convenient, and the matching between the swinging pieces is simpler, and the replacement can also be performed. It is a further advantage of the invention that it is positioned, does not occupy space, and facilitates the management of storage.

The above-mentioned structures are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; therefore, equivalents or modifications may be made without departing from the present invention. Equivalent changes and modifications made under the spirit and scope, such as: roughly changing the shape or size of the components, or slight changes in the shape of the suspended shrapnel, or using different materials, or applied to different projection occasions, etc., but using the present invention All of the features should be covered by the features of the present invention.

Claims (13)

A suspension system for a biaxial optical actuator includes at least a base having a light transmission hole at a center thereof, and a circuit board having a light transmission hole corresponding to the base at the center; The oscillating member is an annular structure body having a square hole formed in the middle, a stepped mirror groove is formed around the middle hole, and an optical lens is placed; a suspended elastic piece has a frame body, and A light-transmitting hole is formed in the center of the frame body, and an elastic unit is disposed at each of the four corners of the frame body, and the outermost ring of the elastic unit is provided with a bent outer ring frame, and a handle is formed at the center thereof. The ring frame extends from the two sides of the frame body to form a first cantilever, and a bent portion is further formed at an end of the first cantilever, and a second cantilever is formed parallel to the first cantilever At the end of the second cantilever, a connecting arm is disposed inwardly, and the connecting arm is further connected to the frame body; four magnetic devices are disposed on four outer sides of the swinging member, and the electromagnetic member controls the swinging member. Movement, and the connection between the two magnetic devices constitutes the rotation of the swinging member An axis; the suspended elastic piece and the swinging member are combined with each other, and the suspension elastic piece is combined with the swinging piece by the first locking component; and the second locking component is passed through the outermost end of the hanging elastic piece, and is worn at the same time. The circuit board and a support post are fixed on the base, so that the suspended elastic piece can drive the swinging member to perform multi-point positioning and swinging by the action of the magnetic device. The suspension system of the biaxial optical actuator of claim 1, wherein the length of the first cantilever of the elastic unit is greater than the length of the second cantilever. According to the suspension system of the biaxial optical actuator of claim 1, the twist of the first cantilever of the elastic unit and the twist of the second cantilever are the same. According to the suspension system of the biaxial optical actuator of claim 1, the first cantilever and the second cantilever of the elastic unit are cantilever of equal diameter. According to the suspension system of the biaxial optical actuator of claim 1, the first cantilever and the second cantilever of the elastic unit are cantilever beams of unequal diameter. According to the suspension system of the biaxial optical actuator of the first aspect of the invention, the bending portion and the arm of the elastic unit have a greater twist than the first cantilever and the second cantilever. According to the suspension system of the biaxial optical actuator of claim 1, the bending portion and the arm of the elastic unit have a twist that is not greater than the twist of the first cantilever and the second cantilever. According to the suspension system of the biaxial optical actuator of claim 1, the swinging member is composed of a top seat and a lower seat, and the suspended elastic piece is just sandwiched between the upper seat and the lower seat. According to the suspension system of the biaxial optical actuator of the first aspect of the invention, the swinging member is integrally formed, and the suspended elastic piece is embedded in a central plane of the swinging member. According to the suspension system of the biaxial optical actuator of the first aspect of the invention, the swinging member is integrally formed, and the suspension elastic piece is fixed below the swinging member. According to the suspension system of the biaxial optical actuator of claim 1, the outer ring frame of the elastic unit is bent at ninety degrees. According to the suspension system of the biaxial optical actuator of claim 1, the first suspension arm, the bent portion, the second cantilever, and the arm extending from the two sides of the outer ring frame are nine Ten degrees bent and connected. According to the suspension system of the biaxial optical actuator of the first aspect of the invention, the four magnetic devices are disposed opposite to the central position of the four outer sides of the oscillating member.