TWM587280U - Ultra miniature biaxial optical actuator - Google Patents

Abstract

The utility model relates to an ultra-miniature biaxial optical actuator. A metal punched suspension spring is mounted on a base, and the suspension spring carries an optical lens. The suspension spring is fixed on one side. On the base, the hanging shrapnel can take the fixed side as the axis, and the other end can swing up and down; and because the hanging shrapnel is provided with two opposite side frames, the hanging shrapnel can be divided by the central virtual axis The axis, but repeated precise rotation, can precisely drive the optical lens to perform two axial swings; it not only reduces the size of the parts, but also has excellent elasticity, saves costs, and is suitable for use on thin and light projectors.

Description

Ultra-miniature dual-axis optical actuator

This creation is about an ultra-miniature dual-axis optical actuator, especially an optical actuator suitable for projection equipment. It is a magnetically-driven dual-axis swing design, which can make the swing of the actuator more stable and accurate. , And greatly improve the resolution and stability of the projection.

More advanced optical projection systems are not only required to be compact, but also have better projection resolution and lower costs. Under these three previous questions, the design of more advanced optical projection systems is at present. Please refer to section 11 for cooperation. As shown in Figures 12 and 12, the image of the microchip panel 92 (for example: DMD) is projected onto a projection screen (not shown) via the 稜鏡 91, the actuator 80, and the lens 90; among them, the projection light travels during the meeting It passes through the lens in the actuator 80 and performs rapid repeated vibration (changing the projection position) through the actuator 80 to continuously change the position of the image to increase the resolution.

However, a common structure of the conventional actuator 80, as shown in Figs. 13, 14, and 15, includes a base 81, and a square assembly groove 801 is provided in the center of the base 81. A bearing 82 and a rotating shaft 83 are respectively provided at the positions; 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 effect (not shown in the figure), the swinging member 84 can be driven to use the axis L1 between the two bearings 82 and the rotating shaft 83 as a baseline, so that both sides of the swinging member 84 can swing up and down regularly to change the projection position. Is the most commonly used method.

The shortcoming of the optical actuator 80 of the conventional projection device is that the bearing 82 and the rotating shaft 83 are used as the fulcrum. However, there is a gap between the bearing 82 and the rotating shaft 83. Therefore, when the bearing 82 and the rotating shaft 83 swing up and down on both sides, The position will jump up and down due to the gap, or the shaft 83 will also shift axially within the bearing 82, which causes the position of the light projection to change from time to time due to the gap and axial displacement, resulting in unpredictable errors. Instability is the main disadvantage of conventional practice.

Secondly, bearings 82 are used on the base 81 of the actuator 80. The volume cannot be reduced or thinned, which limits the volume of the product and the cost of production is high. At the same time, it is repaired and replaced after wear. Both require higher costs.

Furthermore, 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 throbbing light spot to bring the projection resolution to the next level. When the optical actuator improves the swing of multiple light spots, in addition to the ingenuity of the structure, when the volume needs to be reduced, but the accuracy and stability of the multi-point moving light spot still need to be maintained, this technology has been There are difficulties, and the industry has been desperate for breakthroughs.

The main purpose of this creation is to mount a metal punched suspension spring on a base, and the suspension spring carries an optical lens; because the suspension spring is fixed to the base on one side, Therefore, the hanging shrapnel can take the fixed side as the axis, and the other end can swing up and down; and because the hanging shrapnel is provided with two opposite side frames, the hanging shrapnel can be centered on the central bisecting virtual axis as the axis. Precise rotation can just drive the optical lens to perform two axial swings; not only simplify the parts and reduce the volume, but also the elasticity is excellent, which not only saves costs, but also is suitable for use on thin and light projectors.

In order to achieve the above purpose, this case can be achieved in the following ways:

A base is provided, a base is provided with a light-transmitting hole, and two protruding corner blocks are respectively provided at two corners of one side of the light-transmitting hole, and an insertion post is provided above the block; A hanging shrapnel is punched out of a metal sheet, has a central frame, and uses the central frame to carry optical lenses. The frame is provided with a bisecting virtual axis, and on both sides of the bisecting virtual axis, The two sides of the central frame are provided with a side frame, which protrudes outside the central frame, and is connected to the central frame by two ends. A fixing portion is provided in the center of the side frame, and Between the fixed portion and the two end portions, more than one elastic bending portion is provided, and the suspension elastic piece is fixed on the base post by the two fixing portions, and the suspension elastic piece is set on the pad of the base. At least two sets of electromagnetic components, one of which is located on the bisecting virtual axis of the suspension shrapnel, and the other group is located on either side of the bisecting virtual axis; the electromagnetic components are respectively Each has a ring-shaped coil and an inverted loop-shaped magnetically permeable frame. One side plate of the magnetically permeable frame is Into the central space of the toroidal coil, and the other side plate is suspended by the magnet outside and attached to the outside of the toroidal coil. After the electromagnetic component is energized, an electromagnetic force field can be formed, and the suspension is magnetically attracted by different electromagnetic components. The hanging shrapnel makes the hanging shrapnel rotate repeatedly in the two directions, which not only saves space, but also saves costs and greatly improves the resolution and stability of the projection.

[This creation]

10‧‧‧ base

11‧‧‧light transmission hole

12‧‧‧ lock feet

13‧‧‧ spacer

131‧‧‧ Positioning datum

132‧‧‧ Positioning datum

14‧‧‧ Column

151‧‧‧ positioning bump

152‧‧‧Positioning bump

153‧‧‧ positioning bump

16‧‧‧ wire hole

20‧‧‧ Suspended shrapnel

20A‧‧‧Hanging shrapnel

20B‧‧‧ Suspended shrapnel

20L‧‧‧ Bisects the virtual axis

21‧‧‧ central frame

22‧‧‧side frame

22’‧‧‧side frame

221‧‧‧ tip

222‧‧‧End

222’‧‧‧ end

222B‧‧‧End

223‧‧‧Fixed section

224‧‧‧Elastic bending part

224’‧‧‧ Elastic bending part

225‧‧‧Elastic bending part

225’‧‧‧ Elastic bending part

226‧‧‧Elastic bending part

226’‧‧‧ Elastic bending part

227‧‧‧Elastic bending part

227’‧‧‧ Elastic bending part

228‧‧‧Positioning Department

2281‧‧‧Positioning face

2282‧‧‧Positioning face

229‧‧‧Connection Department

30‧‧‧Electromagnetic components

31‧‧‧coil

32‧‧‧ Magnetic frame

33‧‧‧Magnet

40‧‧‧Electromagnetic components

41‧‧‧coil

42‧‧‧ Magnetic frame

43‧‧‧Magnet

50‧‧‧Electromagnetic components

51‧‧‧coil

52‧‧‧ Magnetically permeable frame

53‧‧‧Magnet

60‧‧‧optical lens

70‧‧‧Power signal line

Lx‧‧‧Virtual axis

Ly‧‧‧ virtual axis

Lz‧‧‧Virtual axis

M1‧‧‧rotating torque

M2‧‧‧rotating torque

〔Usually〕

80‧‧‧Actuator

801‧‧‧assembly tank

81‧‧‧ base

82‧‧‧bearing

83‧‧‧ shaft

84‧‧‧Swing

841‧‧‧ carrier

842‧‧‧Lens

90‧‧‧ lens

91‧‧‧ 稜鏡

92‧‧‧Micro Chip Panel

L1‧‧‧ axis

Figure 1 is the appearance of the three-dimensional structure of this creation.

Figure 2 is a three-dimensional structure view of the original lens after the optical lens is pulled up.

Figure 3 is an exploded view of the three-dimensional structure of this creation.

Figure 4-1 is the three-dimensional structure diagram of the hanging shrapnel in this creation.

Figure 4-2 is the plane structure diagram of the hanging shrapnel in this creation.

Fig. 5 is a schematic diagram of the three-dimensional structure of this creation that vibrates up and down on the Z axis.

Figure 6 is a schematic diagram of the side structure of this creation that vibrates up and down on the Z axis.

Figure 7 is a schematic diagram of the three-dimensional structure of this creation that makes relative vibration on the X-Y axis plane.

Figure 8 is a schematic diagram of the side structure of this creation that makes relative vibration on the X-Y axis plane.

Fig. 9 is a structural diagram of a second embodiment of the hanging shrapnel of the present invention.

Fig. 10 is a structural diagram of a third embodiment of the hanging shrapnel of the present invention.

FIG. 11 is a schematic diagram 1 of an application description of a conventional optical actuator.

FIG. 12 is a schematic diagram 2 of an application description of a conventional optical actuator.

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

FIG. 14 is a plan structural view of FIG. 13.

Fig. 15 is a sectional view taken along the line A-A of Fig. 14.

Please refer to Figures 1, 2, and 3, which are a three-dimensional combination of the creation and a progressive three-dimensional exploded view. It can be seen that the creation includes at least: a base 10 provided with a light transmitting hole 11, the light transmitting hole 11 matches the shape of the optical lens 60 to form a substantially square body. Two corners on one side of the light transmitting hole 11 are respectively provided with two positioning reference surfaces 131 and 132 on the outside of the cushion 13 and There are insert posts 14 above the cushion block 13; three side-by-side positioning projections 151, 152, 153 are provided on the opposite side of the cushion block 13 of the light-transmissive hole 11; the base 10 is provided with a wire hole 16 on the side wall Is used for accommodating a power signal line 70; in addition, a plurality of locking feet 12 are provided on the periphery to facilitate fixing on the electronic equipment (not shown). Please refer to Figures 3, 4-1, and 4-2. A suspension spring 20 is stamped from a metal sheet and has a central frame 21. The preferred embodiment of the central frame 21 is a A rounded square body, the central frame 21 carries the optical lens 60; a virtual axis 20L is bisected on the frame 21, and two sides of the virtual axis 20L are bisected on the two edges of the central frame 21 Each side frame 22 is provided. The side frame 22 protrudes beyond the central frame 21 and is connected to the central frame 21 by two end portions 221, 222. A fixing portion 223 is provided in the center of the side frame 22, A preferred embodiment of the fixing portion 223 is a ring body, and between the fixing portion 223 to the two end portions 221,222 of the side frame 22, there are more than one (two in the embodiment of the present case) elastic bending portions 224,225,226,227, One of the preferred embodiments of the elastic bending portion 224, 225, 226, 227 is an arc-shaped structure; a positioning portion 228 is provided on the outer side of the central fixing portion 223 of the side frame 22, and has two adjacent two positioning end faces 2281. , 2282; see Figures 1, 2, 3, and 4-2, the suspension spring 20 is set on the base 10 with two fixing portions 223 And insert the suspension spring 20 on the cushion block 13 of the base 10; at the same time, the two positioning end faces 2281,2282 of the positioning portion 228 of the suspension spring 20 can just match the two of the cushion block 13 Position the reference planes 131 and 132 so that the suspension spring 20 can be accurately positioned. The fixing portion 223 and the positioning portion 228 of the suspension spring 20 abut against the top surface of the cushion block 13 and are glued and fixed, and the suspension spring 20 is mounted on the base. On the cushion 13 of the seat 10.

Please refer to Figs. 1, 2, and 3. The three sets of electromagnetic components 30, 40, and 50 each have a loop coil 31, 41, 51 and are positioned at the positioning projections 151, 152, 153 of the base 10; An inverted magnetically permeable frame 32, 42, 52 is set, in which one plate is inserted into the central space of the loop coil 31, 41, 51, and the other plate is suspended by a magnet 33, 43, 53 Outside the coils 31,41,51, the three sets of electromagnetic components 30,40,50 can form an electromagnetic force field after being energized, and the different spring components 30,40,50 are used to attract the suspension spring 20 magnetically, Makes the suspension spring 20 different The baseline of the light beam is used as a reference, and the rotation is repeated quickly and accurately in a specific direction, and the projected light can be derived from the optical lens 60 through the optical actuator.

One of the axial movements of this creation is shown in Figures 2, 5, and 6. The connection between the two pins 14 of the base 10 is the virtual axis Lx of the X axis, and the side of the base 10 is Y. The virtual axis Ly of the axis, the plane of the base 10 is the plane of the XY axis, and the center line direction of the post 14 is the virtual axis Lz of the Z axis. When the suspension spring 20 uses the fixing part 223 at the end of the post 14 as The fulcrum is suspended slightly above the base 10. After the current is applied to the other electromagnetic component 40, the magnetic force can be changed upward or downward to enable the suspension spring 20 to use the fixing portion 223 and the end portion of the end of the post 14. 222 is a fulcrum, and the suspension elastic sheet 20 is attracted or pushed near the end of the electromagnetic component 40, which drives the optical lens 60 to repeatedly deviate rapidly in the virtual axis Lz direction.

The movement in the other axis of this creation is shown in Figures 2, 4-2, 7, and 8. The suspension spring 20 is between the two frames 22 of the frame 21, which is the rotation of the suspension spring 20. The virtual axis 20L, when the suspension springs 20 on the two sides of the outer end of the electromagnetic components 30, 50 respectively attract and repel the suspension springs 20, can precisely suspend the suspension springs 20 carrying the optical lens 60 The bisecting virtual axis 20L is used as an axis, and a clockwise or counterclockwise rotation torque M1, M2 is formed on the suspension spring piece 20. Since the side frames 22 on both sides of the suspension spring piece 20 have elastic bending forces that accumulate energy, Since the portions 224, 225, 226, and 227 can rotate repeatedly clockwise and counterclockwise around the virtual axis 20L, the optical lens 60 can be driven to repeatedly deviate rapidly on the plane of the base 10.

Please refer to Figures 4, 2, 5, and 7. In the case of three groups of electromagnetic components 30, 40, and 50 controlled by the current, when the electromagnetic component 40 located at the center (the virtual axis 20L line) is energized, The suspension spring 20 uses the end 222 of the two-side frame 22 on the line connecting the two posts 14 as the axis, and the outer end swings up and down, which can drive the optical lens 60 to deflect light in this axial direction; When the electromagnetic components 30 and 50 located on both outer sides are energized and actuated, the suspension dome 20 can be repeatedly rotated and fixed with the virtual axis 20L as an axis, and the optical lens 60 can be driven to deflect light in the other axial direction. Therefore, when the three sets of electromagnetic components 30, 40, and 50 are repeatedly turned on and off continuously, the optical actuator can be continuously operated in two axes, thereby improving the quality of the projection pixels and the projection effect.

Please refer to Figure 1. Although this design is designed with three sets of electromagnetic components 30,40,50, the two outermost sets of electromagnetic components 30,50 are relatively attractive as shown in Figure 7. So that the suspension lens 20 drives the optical lens 60 to rotate at a fixed angle repeatedly with the middle virtual axis 20L as an axis, but in actual use, in fact, only one of the electromagnetic components 30 and 50 can be reached. Effect (that is, one set of electromagnetic components 40 is disposed on the bisecting virtual axis 20L of the suspension dome 20, and only one set of electromagnetic components 30, 50 is required to be disposed on either side of the bisecting virtual axis 20L), Due to the repeated elastic force of the suspension spring 20, as shown in FIG. 7, only the electromagnetic component 30 attracts the suspension spring 20 downward, and the suspension spring 20 drives the optical lens 60 to rotate counterclockwise. Rotational moment M2; but after the electromagnetic component 30 is powered off, the spring force of the two side frames 22 of the suspension spring 20 (as shown in Figure 4-2) can also cause the clockwise rotation in the opposite direction, that is, A rotational moment M1 is generated, which can further save the cost of an electromagnetic component 50.

Please refer to Fig. 4-2 for the first suspension spring 20 structure of this creation, in which two adjacent side frames 22 can be connected to obtain better strength, as shown in Fig. 9 There are 22 connecting frames on the two sides of the suspension spring 20A, and a connecting portion 229 between the two end portions 222 and 222 '; as shown in Fig. 4-2, the first suspension spring 20 structure of this creation, in which the arc The elastic bending portion 224, 225, 226, 227 can also be formed as shown in FIG. 10. (This case uses two as an example) The elastic bending part of a continuous square convex and concave castle-like structure

224 ', 225', 226 ', 227'; please refer to the first suspension spring 20 structure of this creation shown in Figure 4-2, in which the two sides of the frame are located between the base 10 and the two pins 14 The end portion 222 of 22 can be merged into one, as shown in FIG. 10, the suspension spring piece 20B has only one end portion 222B and is connected to the central frame 21. The above minor changes can still achieve similar effects. In the category of creation.

This creation has the following advantages in use:

1. This work uses the base, suspension shrapnel, and at least two electromagnetic components to form two axial swing characteristics. The simplified structure does not take up space, and the swing is more accurate and durable. This is the main advantage of this work.

2. The electromagnetic component of this creation is located on a single side of the suspension shrapnel, and can be more easily accommodated in the base. Therefore, the volume of the entire optical actuator can be minimized, and it is particularly suitable for ultra-small projection machines Use, so that the cost is reduced and does not take up space, is another advantage of this creation.

3. The hanging shrapnel of this creation is provided with side frames on two opposite sides of the central frame, which can achieve two optical actuators with axial movement, which is more delicate than the conventional two-color point, which can improve Quality and improving the projection effect are another advantage of this creation.

However, the structure described above is only a preferred embodiment of this creation, and is not intended to limit the scope of implementation of this creation; therefore, those who are familiar with the equivalent or easy changes made by this technique will not depart from this creation. Equal changes and modifications made under the spirit and scope, such as the use of changes in materials and sizes, or the slight deformation of the hanging shrapnel, but the characteristics are still the same, are still the characteristics of this creation, they should be covered in this creation Within the feature.

Claims (10)

An ultra-miniature biaxial optical actuator includes at least: a base provided with a light-transmissive hole, and two protruding corner blocks on one side and two corners of the light-transmissive hole, respectively. There are insert posts above the block; a hanging shrapnel is stamped from a metal sheet, has a central frame, and uses the central frame to carry optical lenses; a virtual axis is bisected on the frame, The two sides of the virtual axis are equally divided, and a side frame is provided on each edge of the central frame. The side frame protrudes beyond the central frame and is connected to the central frame by two ends. There is a fixing part in the center of the bracket, and between the fixing part and the two end parts, each is provided with more than one elastic bending part, and the suspension elastic piece is fixed on the post of the base with the two fixing parts, and the suspension Hanging shrapnels are mounted on the pads of the base; at least two sets of electromagnetic components, one of which is set on the bisecting virtual axis of the hanging shrapnel, and the other is set on either side of the bisecting virtual axis ; The electromagnetic components each have a loop coil and an inverted mag-shaped magnetically conductive frame, the conductive One side of the frame is inserted into the central space of the toroidal coil, and the other side of the frame is suspended by the magnet and is suspended outside the toroidal coil. After the electromagnetic component is energized, an electromagnetic force field can be formed. The magnetic component of the magnetic attraction attracts the suspension shrapnel magnetically, so that the suspension shrapnel is repeatedly rotated in the two directions respectively. According to the ultra-miniature dual-axis optical actuator described in item 1 of the scope of the patent application, a cushion on the base is provided with two positioning reference planes; and the suspension elastic piece is provided on the outer side of the fixed part of the side frame A positioning portion is provided, and the positioning portion is provided with two positioning end faces. According to the ultra-miniature dual-axis optical actuator described in item 1 of the scope of patent application, the base is provided with positioning bumps at positions relative to the coil. According to the ultra-miniature biaxial optical actuator described in item 1 of the scope of patent application, two elastic bending portions are provided on the side frame of the suspension elastic piece. According to the ultra-miniature biaxial optical actuator described in item 1 of the scope of patent application, the elastic bending portion of the suspension shell has a circular arc structure on the side frame. According to the ultra-miniature biaxial optical actuator described in item 1 of the scope of patent application, the elastic bending portion of the suspension shell has a square structure on the side frame. According to the ultra-miniature dual-axis optical actuator described in item 1 of the scope of the patent application, the elastic bending portion on the suspension dome is more than two and both are square bodies, and the elastic arms form a continuous convex and concave castle shape. structure. According to the ultra-miniature dual-axis optical actuator described in the first patent application scope, the electromagnetic components are three groups, one of which is arranged on the bisecting virtual axis of the suspension spring, and the other two groups are respectively set On both sides of the bisecting virtual axis. According to the ultra-miniature biaxial optical actuator described in item 1 of the scope of the patent application, a connecting portion is further provided on the two end portions of one side between the two side frames of the suspension dome. According to the ultra-miniature dual-axis optical actuator described in item 1 of the scope of the patent application, the suspension shrapnel is at the position between the two insertion posts of the base, and the two ends of the two side frames are merged into one, and The central frames are connected.