TWI753615B - Light path adjustment mechanism and fabrication method thereof - Google Patents

Abstract

A light path adjustment mechanism includes a frame, an optical element, and a connection machine part. The optical element is disposed in the frame and provided with at least one hot-melt protrusion. One end of the connection machine part is thermally bonded to the optical element by the hot-melt protrusion, and other end of the connection machine part is connected to the frame.

Description

Optical path adjustment mechanism and manufacturing method thereof

The present invention relates to an optical path adjustment mechanism.

In recent years, various image display technologies have been widely used in daily life. In an image display device, for example, an optical path adjustment mechanism can be provided to change the traveling optical path of the light in the device, so as to provide various effects such as improving the imaging resolution and improving the picture quality. However, the number of components, weight, and volume of the conventional optical path adjustment mechanism are relatively large, and further miniaturization is difficult. Therefore, there is an urgent need for a design of an optical path adjustment mechanism with a simple structure, high reliability, and a significant reduction in weight and volume.

The "prior art" paragraph is only used to help understand the present disclosure, so the content disclosed in the "prior art" paragraph may contain some that do not constitute the prior art known to those with ordinary skill in the art. The content disclosed in the "Prior Art" paragraph does not represent the content or the problem to be solved by one or more embodiments of the present invention, and has been known or recognized by those with ordinary knowledge in the technical field before the application of the present invention.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the embodiments of the present invention.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame body, an optical element, and a connecting mechanism. The optical element is arranged in the frame and has at least one hot-melt protrusion, one end of the connecting component is thermally fused with the optical element through the hot-melting protrusion, and the other end of the connecting component is thermally fused. One end is connected to the frame.

Another embodiment of the present invention provides an optical path adjustment mechanism, which includes a bearing base, a first connecting member and a second connecting member. The bearing seat is provided with an optical element, and two opposite positions of the bearing seat are provided with a first area and a second area, the first area has a first heat-melting protrusion, and the second area has a second heat-melting protrusion. One end of the first connecting member is provided with a first hole and is connected to the first hot-melt protrusion through the first hole. One end of the second connecting member is provided with a second hole and is connected to the second heat-melting protrusion through the second hole.

With the design of the above-mentioned embodiment, since a stress concentration area is not formed at the connection between the connecting mechanism and the optical element, the optical element can be greatly reduced or eliminated, which is beneficial to improve the imaging resolution and image quality (eliminate dark spots). area, soften image edges), etc.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention. In order to make the above-mentioned and other objects, features and advantages of the present invention more obvious and easy to understand, the following specific embodiments are given in conjunction with the accompanying drawings, and are described in detail as follows.

100: Optical path adjustment mechanism

110: Bracket

112: Optical Components

112a, 112b: fixing holes

113, 113a, 113b: hot melt protrusions

114: Pedestal

120: Actuator assembly

122: Coil set

122a: Coil

124: Magnet

125: Magnetic body

130: Connecting parts

131: Spindle

132, 134: leaf spring

132a, 132b: fixing holes

133: Control parts

134a, 134b: fixing holes

137: Spring

140: Frame

140a, 140b: fixing holes

142, 144, 146: Clamping fasteners

142a: Positioning post

146a: Fastener section

150: Piezoelectric element

170, 170a, 170b: Nut

171a, 171b: holes

172: Recessed hole

180: Screw

200: Optical path adjustment mechanism

210: Linkage

212: Lenses

212a: lens body

212b, 212c: positioning part

214: Lens holder

214a, 214b: fixing holes

215: Bearing seat

220: Actuator Assembly

222: Coil Set

224: Magnet

230, 230a, 230b: connecting parts

232: leaf spring

232a, 232b, 232c, 232d: fixing holes

232e: Ring Section

232f, 232g: Extensions

240: Frame

240a, 240b: fixing holes

242: Outer frame

300: Optics

310: Lighting Systems

312: light source

312R, 312G, 312B: Light Emitting Diodes

314: Beam

314a: Subimage

316: Light Combining Device

317: Column of light

318: Lens group

319: Internal Total Reflection

320: Digital Micromirror Device

330: Projection Lens

340: Optical path adjustment mechanism

350: Screen

A: Rotation axis

H: hole

M: initial position

P, Q: direction of rotation

S, S': the first area

T, T': the second area

θ: angle

FIG. 1 is an exploded view of the components of an optical path adjustment mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the optical path adjustment mechanism of FIG. 1 after assembly.

FIG. 3 is a schematic diagram of an actuating state of a link member according to an embodiment of the present invention.

FIG. 4 is an exploded view of the components of the optical path adjustment mechanism according to another embodiment of the present invention.

FIG. 5 is a schematic diagram of the optical path adjustment mechanism of FIG. 4 after assembly.

FIG. 6 is a schematic diagram of a coil accommodating structure according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of an actuating assembly according to another embodiment of the present invention.

FIG. 8 is a schematic diagram of an optical path adjustment mechanism applied to an optical system according to an embodiment of the present invention.

FIG. 9A and FIG. 9B are according to an embodiment of the present invention, showing the connecting mechanism using the machine The three-dimensional and cross-sectional schematic diagrams of the optical path adjustment mechanism with mechanical fixation.

10 is a schematic cross-sectional view of an optical path adjusting mechanism in which the connecting parts are mechanically fixed according to another embodiment of the present invention.

11A, 11B, 11C are schematic diagrams showing clamping fasteners according to different embodiments of the present invention.

12A is a schematic diagram showing an optical path adjustment mechanism according to another embodiment of the present invention.

12B is a schematic diagram showing an optical path adjustment mechanism according to another embodiment of the present invention.

13A and 13B are schematic diagrams showing an optical path adjustment mechanism according to another embodiment of the present invention.

14A is a stress distribution diagram of self-tapping to connect an optical element and a connecting mechanism, and FIG. 14B is a stress distribution diagram of an optical path adjustment mechanism according to an embodiment of the present invention.

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only for referring to the directions of the attached drawings. Accordingly, the directional terms used are illustrative and not limiting of the present invention.

The disclosure in the following embodiments discloses an optical path adjustment mechanism, which can be applied to different optical systems (such as display devices, projection devices, etc.) to adjust or change the optical path to provide, for example, improving imaging resolution, improving image quality (eliminating dark spots, etc.). The effects of the optical path adjustment mechanism in the optical system are not limited at all. The optical path adjustment mechanism may include, for example, a linking member, an actuating component, a connecting mechanism, and a frame body, some or all of these components. in the following In the various embodiments described above, the linkage or the support frame may include an optical element capable of deflecting light, and the linkage member or the support frame may further include a bearing seat for carrying the optical element. The actuation form of the linkage member or the support frame is for example: It can be rotated, vibrated, moved, etc. without limitation; the actuating component only needs to be able to generate the effect of driving the linkage, and its components are not limited, for example, it can be an electromagnetic induction component including a magnet and a coil group (or coil). ; The connecting parts can have the property of changing in the direction of restoring their original size and shape when the external force is removed after deformation, for example, they can be at least slightly elastic or flexible, and the connecting parts can be used to connect the parts, or can be Various transmission parts that can transmit power, control parts that buffer vibration or control movement are not limited, and the connecting parts can be, for example, bolts, keys, pins, rivets, springs, leaf springs, wire springs, flexible chip machines The frame body only needs to be able to define an accommodating space, which can be a base, a frame or an outer frame with different forms or shapes without limitation.

FIG. 1 is an exploded view of the components of an optical path adjustment mechanism according to an embodiment of the present invention. As shown in FIG. 1 , the optical path adjustment mechanism 100 includes a support frame 110 , an actuating component 120 , a connecting member 130 and a frame body 140 . In this embodiment, the support frame 110 includes an optical element 112 that can deflect light, such as a lens, and the lens only needs to provide the effect of deflecting light. The form and type are not limited. Lens or a Mirror. In another embodiment, a carrier may also be included, and the optical element is disposed on the carrier, or both the carrier and the optical element are integrally formed. In this embodiment, the actuating element 120 can be, for example, an electromagnetic induction element including a coil set 122 and a magnet 124. In another embodiment, for example, another coil set can be used as a magnetic body or a magnetic material instead of the magnet. Another coil set (not shown) in the frame body 140 can also generate electromagnetic force with the coil set wound on the support frame 110 to drive the support frame 110 . In this embodiment, the connecting member 130 can be, for example, two thin metal leaf springs 132 and 134 with restoring force. Both ends of the leaf spring 132 may have pin fixing holes 132a and screw fixing holes 132b, both ends of the leaf spring 134 may have pin fixing holes 134a and screw fixing holes 134b, and both ends of the optical element 112 may be provided for fixing holes 112a and 112b, and fixing holes 140a and 140b may be provided at both ends of the frame body 140 . In an assembly embodiment, the support frame 110 is disposed in the frame body 140 , the magnet 124 can be fixed in the frame body 140 , the coil set 122 can be wound around the optical element 112 and can be wound around the periphery of the optical element 112 , the plate One end of the spring 132 can be fixed to the optical element 112 through the fixing hole 132a corresponding to the position, the fixing hole 112a can be fixed to the optical element 112 by a fixing member such as a screw or a latch, and the other end of the leaf spring 132 can be fixed through the fixing hole 132b and the fixing hole 140a corresponding to the position. To the frame body 140 , the leaf spring 132 is disposed between the optical element 112 and the frame body 140 . The assembled optical path adjustment mechanism 100 is shown in FIG. 2 . Therefore, the leaf springs 132 and 134 disposed at both ends of the optical element 112 can be connected to the optical element 112 , and the connecting directions of the leaf springs 132 and 134 can substantially coincide with the rotation axis A of the support frame 110 , and the optical element 112 can rotate along the axis A. For the reciprocating action of the axis, for example, the axis A can be rotated or swung clockwise or counterclockwise as the axis. As shown in FIG. 3A , in one embodiment, the electromagnetic force between the coil set 122 and the magnet 124 can make the optical element 112 rotate an angle θ from the initial position M along the rotation direction P with the rotation axis A as the center, and the leaf spring 132 The restoring force of 134 can rotate the optical element 112 back to the initial position M along the opposite rotational direction Q; in another embodiment, another electromagnetic force can be applied between the coil set 122 and the magnet 124 to assist the restoration of the leaf springs 132 and 134 The force rotates the optical element 112 back to the initial position M along the opposite rotation direction Q, so the optical element 112 can swing back and forth to different positions to deflect the incident light to different directions, so as to adjust or change the optical path of the light. In one embodiment, the rotation angle θ of the support frame 110 may be in the range of -1 to 1 degree, preferably in the range of +/-0.2 to +/-0.5 degree, and may be, for example, +/-0.32 degree. The optical path adjustment mechanism in the embodiment of the present invention can adjust or change the optical path to produce different effects according to actual needs, such as improving projection resolution, improving image quality (eliminating dark areas, softening image edges), etc. without limitation.

FIG. 4 is an exploded view of the components of the optical path adjustment mechanism according to another embodiment of the present invention, and FIG. 5 is a schematic diagram of the optical path adjustment mechanism of FIG. 4 after assembly. As shown in Figure 4 and Figure 5, In this embodiment, the linkage 210 of the optical path adjustment mechanism 200 may include, for example, a lens 212 and a lens holder 214 for accommodating the lens 212 , and the actuating element 220 may be, for example, an electromagnetic induction element including a coil set 222 and a magnet 224 . The coil set 222 can be wound around the lens holder 214 , for example, can be wound around the periphery of the lens holder 214 , and the magnet 224 can be fixed to the frame body 240 . The connecting mechanism 230 can be, for example, an integrally formed leaf spring 232 spanning from one end of the lens holder 214 to the other end. The shape of the leaf spring 232 is not limited. In this embodiment, the leaf spring 232 has an annular portion 232e and two extending portions 232f and 232g extending from the annular portion 232e toward both ends of the link member 210 . The extension direction of 232g may substantially coincide with the rotation axis A. Two ends of the leaf spring 232 may have fixing holes 232a, 232b, 232c, and 232d, and two ends of the lens holder 214 may be respectively provided with fixing holes 214a (corresponding to the fixing holes 232b) and fixing holes 214b (corresponding to the fixing holes 232c). A fixing hole 240a (corresponding to the fixing hole 232a) and a fixing hole 240b (corresponding to the fixing hole 232d) may be respectively provided at both ends. The integrally formed leaf spring 232 can be provided between the lens holder 214 and the frame body 240 by fixing with fixing members such as screws (not shown) through the corresponding fixing holes. The extension direction of the leaf spring 232 substantially coincides with the rotation axis A of the linking member 210 , the linking member 210 (the lens 212 and the lens holder 214 ) can rotate clockwise or counterclockwise with the rotation axis A as the center, and the restoring force of the leaf spring 232 can make the linking The member 210 rotates back to the original position in the opposite rotation direction. In another embodiment, another electromagnetic force can be applied between the coil set 222 and the magnet 224 to assist the restoring force of the leaf spring 232 to rotate the linkage member 210 back in the opposite rotation direction. Therefore, the linkage member 210 can swing back and forth to different positions, so that the lens 212 can deflect the incident light to different directions, so as to obtain the effect of adjusting or changing the light path of the light.

With the design of the above-mentioned embodiment, since at least part of the structure of the actuating component (such as the coil group or the coil) is directly disposed on the lens holder of the linking member, the overall volume, weight or number of components of the optical path adjustment mechanism can be reduced, which is beneficial to the The optical path adjustment mechanism is miniaturized or thinned to match various microelectronic devices.

The connecting parts of the various embodiments of the present invention are only examples, and the connecting parts provided between the optical element and the frame body can be various transmission parts that can transmit power or control parts used to buffer vibration or control movement, but not Define, for example, a spring, a leaf spring, a wire spring, a flexible leaf or a flexible leaf, and the like. Furthermore, the optical element such as a lens can be provided on other carriers and is not limited to a lens holder, and the frame body can be a frame or an outer frame of different forms or shapes without limitation.

In one embodiment, the wire diameter of the coil assembly may be less than 0.2 mm, for example, may be 0.05 mm, and the method of fixing the coil assembly on the linkage is not limited, for example, gluing (such as UV dispensing or outer enameled wire gluing) can be used. ), thermal welding, socketing, etc. The material of the frame body can be, for example, metal (aluminum alloy, magnesium alloy, etc.) or plastic, which is not limited. The material of the magnet can be a hard magnet or a soft magnet without limitation, for example, it can be a neodymium iron boron magnet (NdFeB). If the magnet is too large, it will occupy more space. If the magnet is too small, the magnetic force will be insufficient. Therefore, a preferred size of the magnet is 14mm×7mm×5mm-0.5mm×0.5mm×0.5mm, for example, it can be 9mm×1.9mm×0.8 mm, in one embodiment, may be, for example, 9 mm×1.9 mm×0.3 mm. The heat-resistant allowable temperature of the magnet may be less than 120 degrees.

In one embodiment, the natural frequency of the linkage can be adjusted by changing the counterweight of the bolt, the counterweight of the screw, adding the mass block, setting the pressure plate, etc., so that the natural frequency of the linkage can be greater than 90 Hz to avoid resonance phenomenon, and the higher the frequency. The natural frequency can improve the response speed of the linkage, and a smaller actuator can be used to make the linkage reach a preset rotation angle.

In one embodiment, at least part of the structure of the optical path adjustment mechanism can be a one-piece structure to achieve effects such as reducing the number of parts, simplifying the overall structure, and shortening assembly man-hours. For example, the connecting member, the lens and the frame can be integrally formed using the same material (such as plastic or metal), or the two components can be integrally formed first, for example, the connecting member, the lens and the frame can be integrally formed first, or the connecting member, The frame body can be integrally formed first and then combined with other components. At this time, the fixing method of the combination can be pin gluing, glue dispensing or fixing with screws. in another In an embodiment, the connecting mechanism, the lens, the lens holder and the frame can be integrally formed with the same material (eg, plastic or metal), or at least two of the components can be integrally formed first and then combined with other components. In another embodiment, as shown in FIG. 3 , for example, a rotating shaft 131 formed by a connecting component can be connected to the optical element 112 , a coil can be wound around the periphery of the optical element 112 , and the optical element 112 and the rotating shaft 131 can be integrally formed to form a single body. A mechanism for adjusting the optical path is formed. In another embodiment, as shown in FIG. 6 , a mechanism for adjusting the optical path may include an outer frame 242 , a magnetic body 125 , a bearing seat 215 , a lens 212 disposed on the bearing seat 215 , a surrounding A coil 122a on the periphery of the bearing seat 215, and a control mechanism 133 disposed between the bearing seat 215 and the outer frame 242, and the control mechanism 133 and the bearing seat 215 can be integrally formed, or the control mechanism 133, the outer frame 242 and the optical element 112 can be integrally formed.

In another embodiment, a mechanism for adjusting an optical path includes a frame, a lens holder, a coil assembly and a transmission mechanism, the lens holder is accommodated in the frame and includes a lens, and the coil assembly is wound around the lens holder. The transmission mechanism is connected between the lens seat and the frame, and among the three components of the frame, the lens seat and the transmission mechanism, at least two of them are integrally formed. Furthermore, a shock absorbing material such as rubber can be filled between the frame body and other internal components to provide shock absorbing effect.

In one embodiment, the weight of the optical path adjustment mechanism may be less than 5g, eg, 1.6g, and the volume may be less than 40mm x 40mm x 10mm, eg, 21mm x 21mm x 3.6mm. The driving frequency of the actuating element can be 24Hz-120Hz, and the electromagnetic induction element can be, for example, a voice coil motor. The type of the actuating assembly is not limited, as long as the effect of driving the link member to swing back and forth can be obtained. In another embodiment, as shown in FIG. 7 , the actuating element may include, for example, a piezoelectric element 150 disposed on the lens 212 , and the piezoelectric element 150 may be compressed or stretched by applying an electric field to the piezoelectric element 150 . Deformation means that electrical energy can be converted into mechanical energy so that the lens 212 can be oscillated back and forth to adjust the optical path.

FIG. 8 is a schematic diagram of an optical path adjustment mechanism applied to an optical system according to an embodiment of the present invention. Referring to FIG. 8 , the optical device 300 includes an illumination system 310 , a digital micromirror device 320 , a projection lens 330 and an optical path adjustment mechanism 340 . The illumination system 310 has a light source 312 suitable for providing a light beam 314 , and the digital micromirror device 320 is disposed on the transmission path of the light beam 314 . The digital micromirror device 320 is adapted to convert the light beam 314 into a plurality of sub-images 314a. In addition, the projection lens 330 is disposed on the transmission path of the sub-images 314 a, and the digital micromirror device 320 is located between the illumination system 310 and the projection lens 330 . In addition, the optical path adjustment mechanism 340 can be configured between the digital micromirror device 320 and the projection lens 330, for example, between the digital micromirror device 320 and the internal total reflection lens 319 or between the internal total reflection lens 319 and the projection lens between the lenses 330 and on the transmission path of these sub-images 314a. In the above-mentioned optical device 300 , the light source 312 may include, for example, a red light emitting diode 312R, a green light emitting diode 312G, and a blue light emitting diode 312B, and the color light emitted by each light emitting diode passes through a light combining device 316 After the light is combined, a light beam 314 is formed, and the light beam 314 passes through a light integration rod 317 , a lens group 318 and a TIR Prism 319 in sequence. Afterwards, the total internal reflection mirror 319 reflects the light beam 314 to the digital micromirror device 320 . At this time, the digital micro-mirror device 320 converts the light beam 314 into a plurality of sub-images 314a, and these sub-images 314a pass through the total internal reflection lamp 319 and the optical path adjustment mechanism 340 in sequence, and the projection lens 330 converts these sub-images 314a Projected on the screen 350 . In this embodiment, when the sub-images 314a pass through the optical path adjustment mechanism 340, the optical path adjustment mechanism 340 will change the transmission paths of some of the sub-images 314a. That is to say, the sub-images 314a passing through the optical path adjustment mechanism 340 will be projected on the first position (not shown) on the screen 350, and the sub-images 314a passing through the optical path adjustment mechanism 340 will be projected in another part of the time. A second position (not shown) projected on the screen 350, wherein the first position and the second position are in the horizontal direction (X axis) or/and the vertical direction (Z axis) different by a fixed distance. In this embodiment, by The optical path adjustment mechanism 340 can move the imaging positions of the sub-images 314a in the horizontal direction or/and the vertical direction by a fixed distance, so that the horizontal resolution and/or the vertical resolution of the images can be improved. Of course, the above embodiments are only examples, the optical path adjustment mechanism of the embodiments of the present invention can be applied to different optical systems to obtain different effects, and the location and configuration of the optical path adjustment mechanism in the optical system are not limited at all.

In one embodiment, the material of the lens can be glass, plastic or glass coated with metal film, plastic (such as silver-coated or aluminum-coated) without limitation, the lens can be, for example, a reflective sheet or a lens, and the connecting parts It can be provided on the lens or lens holder by means of self-tapping, latch, screw cap, heat fusion, gluing or dispensing, etc., but not limited.

9A and 9B are three-dimensional and cross-sectional schematic diagrams showing an optical path adjustment mechanism in which the connecting parts are mechanically fixed according to an embodiment of the present invention. As shown in FIG. 9A and FIG. 9B , the optical element 112 is disposed on the base 114 . The optical element 112 is, for example, a lens (lens or mirror) that can deflect light, and both the optical element 112 and the base 114 are located on the frame body 140 Inside. In this embodiment, the base 114 can be located at the periphery of the optical element 112 and used to hold the optical element 112. The base 114 can be a lens holder formed independently or formed integrally with the optical element 112. The base 114 and the optical element 112 The base 114 may be formed of the same or different materials, and the base 114 is located outside the effective area of the optical element 112 (ie, outside the area where reflection or transmission is substantially generated). The base 114 is provided with a first area S and a second area T at two opposite positions (eg, diagonal positions), and the first area S and the second area T are respectively provided with a first hole 171a and a second hole 171b. A first nut 170a may be provided in the hole 171a in the first region S, and a second nut 170b may be provided in the hole 171b in the second region T. One end of the first connecting member 230a can be locked into the first nut 170a embedded in the base 114 by the screw 180, and the other end of the first connecting member 230a can be connected and fixed to the frame body 140 by the screw 180 . One end of the second connecting member 230b can be locked into the second nut 170b embedded in the base 114 by the screw 180, and the other end of the second connecting member 230b can be locked by the screw 180 is connected and fixed to the frame body 140 . In another embodiment, only one of the holes 171 is provided with the nut 170 according to actual requirements, and it is not necessary to provide the nut 170 in each of the holes 171 .

FIG. 14A is a stress residual distribution diagram of using self-tapping to connect optical elements (such as lenses) and connecting parts (such as springs). In the figure, the dark part of the optical element is the residual stress area, and the darker the color, the higher the residual stress. Large, light-colored blocks represent no residual stress. Fig. 14B is a stress distribution diagram of connecting optical elements (such as lenses) and connecting parts (such as springs) using screws and nuts embedded in the base. In the figure, there are almost no dark areas in the optical elements, indicating that there is no stress concentration phenomenon occurs. Therefore, with the screw 180 being locked into the nut 170 embedded in the base 114, no substantial stress concentration area is formed at the connection between the connecting member 230 and the optical element 112, so it is not necessary to use a self-tapping thread to connect the optical element to the optical element 112. Compared with the way of connecting the parts, the optical components can greatly reduce or eliminate the stress, so it is beneficial to improve the imaging resolution and image quality (eliminate dark areas, soften image edges) and other effects.

FIG. 10 is a schematic cross-sectional view of an optical path adjustment mechanism in which the connecting parts are fixed by means of screw locks according to another embodiment of the present invention. As shown in FIG. 10 , the optical element such as the lens 212 can be installed on the base 214 , the base 214 can be pre-opened with a hole H, and then the nut 170 is inserted into the hole H and fixed in the hole H, such as the connection mechanism of the spring 137 One end of the spring 137 can be locked into the nut 170 embedded in the base 214 by the screw 180 , and the other end of the spring 137 can be fixed to the frame body 240 by the screw 180 . The nut 170 embedded in the base 214 is locked by the screw 180 , so that the connection between the spring 137 and the lens 212 does not form a substantial stress concentration area, which can greatly reduce or eliminate the generation of stress on the optical element. Furthermore, in another embodiment, the hole H of the base 214 can also be provided with an integrally formed thread, so the screw 180 shown in FIG. 10 can be directly locked and the nut 170 can be omitted. The effect of stress relief at the joint.

In the above-mentioned embodiments, a substantially stress-free connection area is formed by means of mechanical fixation. The cooperation between the cylindrical fastener and the hole does not use glue, which can avoid the phenomenon of stress concentration caused by the pressing of the optical element or the substrate itself during fixing. The form or structure of the cylindrical fastener is not limited at all, for example, it can be a screw, a bolt, a nut, a key, a rivet, a latch, a nut or a screw rod, and the like. However, the present invention is not limited to this. In another embodiment, a clamping and fixing method can also be used to form a substantially stress-free area, and the clamping and fixing effect can be achieved by an elastic body or a non-elastic body deformed in the hole. For example, the connecting member may include a clamping fastener 142 as shown in FIG. 11A . The clamping fastener 142 may be, for example, an inelastic body with a positioning post 142a. The post 142a can converge toward the center and generate a force against the wall of the hole to provide a clamping and fixing effect. In another embodiment, as shown in FIG. 11B , the clamping fastener 144 can be an elastic body. When the clamping fastener 144 is inserted into the hole, the clamping fastener 144 can press against the wall surface of the hole by the elastic deformation of the clamping fastener 144 . to provide a clamping and fixing effect. Furthermore, in another embodiment, as shown in FIG. 11C , an area of the base 114 may be provided with a recessed hole 172 , and a portion 146 a (elastomer or non-elastomer) of a clamping fastener 146 may be inserted into the recess. The hole 172 is deformed to clamp and fix the connecting member 230 to this area of the base 114, and the optical element 112 has no substantial stress concentration area.

12A is a schematic cross-sectional view showing another optical path adjustment mechanism according to another embodiment of the present invention. As shown in FIG. 12A , the frame body 140 is provided with a first area S' and a second area T' in diagonal positions, and the lens 212 has a lens body 212a and a second area S' and a second area from the lens body 212a toward the first area S' respectively. The first positioning portion 212b and the second positioning portion 212c are formed by extending the region T′. The first positioning portion 212b is connected to the first region S′ of the frame body 140 and the second positioning portion 212c is connected to the second region T′ of the frame body 140 . The positioning portions 212b and 212c can be connected to the frame body 140 by means of screws 180 or the like, which are not limited. Because the positioning portions 212b and 212c are integrally formed by the lens body 212a, and the connection with the frame body 140 is far away from the lens body 212a, no substantial stress concentration area is formed, which can greatly reduce or reduce the number of optical elements. Eliminate stress generation.

12B is a schematic cross-sectional view showing another optical path adjustment mechanism according to another embodiment of the present invention. As shown in FIG. 12B , the optical element 112 can be integrally formed in the mold together with the connecting member 230 . In this embodiment, the connecting parts 230 include a first connecting part 230a and a second connecting part 230b on two opposite corners of the frame body 140 , and the optical element 112 can be connected to the connecting parts 230a and 230b at the two ends. It is integrally formed in the mold, and the connecting parts 230a and 230b are made of different materials from the optical element 112, but it is not limited. Since the optical element 112 is formed as an integral component with the connecting parts 230a and 230b, the connection between the optical element 112 and the connecting part 230 will not form a substantial stress concentration area, which can greatly reduce or eliminate the stress of the optical element. produce.

13A and 13B are schematic diagrams showing an optical path adjustment mechanism according to another embodiment of the present invention. As shown in FIG. 13A , the optical element 112 can be disposed in the frame body 140 with at least one thermal melting protrusion 113 . In this embodiment, a hole H can be formed at one end of the first connecting member 230a, and the hole H can be inserted into the hot-melt protrusion 113a of the optical element 112, and one end of the second connecting member 230b can also pass through the hole H. The other ends of the connecting parts 230a and 230b can be connected to the frame body 140 respectively connected to the hot-melt protrusion 113b of the optical element 112 . As shown in FIG. 13B , the hot-melt protrusions 113a and 113b can be flattened to fix the first connecting member 230a and the second connecting member 230b, namely, the first connecting member 230a and the second connecting member, respectively. The mechanism 230b may be thermally fusion bonded to the optical element 112 . In another embodiment, one end of the connecting member 230 may be directly attached to the upper surface of the optical element 112 without forming a hole H, and the hot-melt protrusions 113 may be located on both sides of the attaching end of the connecting member 230. The hot-melt protrusion 113 can cover the attachment end of the connecting member 230 from both sides, so that the connecting member 230 and the optical element 112 can be thermally fused together

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art, without departing from the spirit and scope of the present invention, can Some changes and modifications have been made, so the protection scope of the present invention should be determined by the scope of the appended patent application. In addition, any embodiment of the present invention or the scope of the claims is not required to achieve all of the objects or advantages or features disclosed herein. In addition, the abstract section and the title are only used to assist the search of patent documents and are not intended to limit the scope of the present invention.

112: Optical Components

113, 113a, 113b: hot melt protrusions

140: Frame

230, 230a, 230b: connecting parts

H: hole

Claims (10)

An optical path adjustment mechanism, comprising: a frame; an optical element disposed in the frame and having at least one hot-melt protrusion; and A connecting piece, one end of the connecting piece is thermally fused with the optical element through the heat-melting protrusion, and the other end of the connecting piece is connected to the frame body. The optical path adjustment mechanism as described in Item 1 of the scope of the application further includes: A coil surrounds the optical element. An optical path adjustment mechanism, comprising: A bearing seat is provided with an optical element, and two opposite positions of the bearing seat are provided with a first area and a second area, the first area has a first heat-melting protrusion, and the second area has a second heat melting bulge; a first connecting member, one end of the first connecting member is provided with a first hole and is connected to the first hot-melt protrusion through the first hole; and A second connecting member, one end of the second connecting member is provided with a second hole and is connected to the second hot-melt protrusion through the second hole. The optical path adjusting mechanism as described in item 3 of the scope of the patent application further comprises a coil wound around the bearing base, and the material of the optical element is glass. The optical path adjusting mechanism according to claim 1 or 3, wherein the optical element is actuated around a rotation axis, and the rotation axis at least partially overlaps the connecting member. The optical path adjustment mechanism as described in claim 1 or 3 of the claimed scope, wherein the material of the connecting member and the optical element are different. The optical path adjustment mechanism as described in claim 6, wherein the connecting member is a spring, a leaf spring, a flexible leaf-shaped member or a flexible leaf-shaped member. The optical path adjustment mechanism as described in claim 1 or 3, wherein the optical element comprises a reflector or a lens. The optical path adjusting mechanism according to the claim 1 or 3, wherein the optical element is a reflecting mirror, and the reflecting mirror is arranged in the optical path of a projection lens. A manufacturing method of an optical path adjustment mechanism, comprising: provide a frame; An optical element with at least one hot-melt protrusion is arranged in the frame; and A connecting member is provided, one end of the connecting member is thermally fused to the optical element through the hot-melting protrusion, and the other end of the connecting member is connected to the frame body.

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