WO2017162000A1

WO2017162000A1 - Optical element fixing device and optical apparatus

Info

Publication number: WO2017162000A1
Application number: PCT/CN2017/074956
Authority: WO
Inventors: 李锦清; 李屹
Original assignee: 深圳市光峰光电技术有限公司
Priority date: 2016-03-24
Filing date: 2017-02-27
Publication date: 2017-09-28
Also published as: CN205720821U

Abstract

Disclosed is an optical element fixing device, comprising a supporting plate (110) and a fixing piece (200). The supporting plate (110) is provided with a stepped bore penetrating a first face and a second face of the supporting plate opposite each other. The stepped bore comprises a first bore (111) and a second bore (112), with the first bore (111) penetrating the first face and the second bore (112) penetrating the second face. The first bore (111) transits from a stepped face (113) to the second bore (112), and a section of the second bore (112) is larger than a section of the first bore (111). The first bore (111) forms a light beam channel, and the second bore (112) is used for accommodating an optical element (300). A fixing piece (200) comprises a fixing portion and an elastic arm (240), wherein the fixing portion is fixed on the second face, and the elastic arm (240) is connected to the fixing portion and extends towards the stepped face (113) of the stepped bore. The stepped face (113) and the elastic arm (240) respectively press against the optical element (300) from the two faces of the optical element (300) opposite each other. By means of the cooperative arrangement of the elastic arm (240) and the stepped face (113), the optical element (300) is removably fixed between the supporting plate (110) and the fixing piece (200). Also disclosed is an optical apparatus having the optical element fixing device.

Description

Optical component fixtures and optical devices

Technical field

The utility model relates to the field of optics, in particular to an optical component fixing device and an optical device.

Background technique

At present, optical component fixing devices are widely used in optical devices such as projectors, cameras, microscopes, etc.

technical problem

The optical components in the optical component fixing device are generally fixed on the support by a non-detachable fixing manner of glue bonding, and the machining precision of the bearing may be different or error. Once the optical component is fixed, even if the above difference is found or Error, it is also impossible to adjust the position of the non-removable optical component. In addition, when the optical component needs to be replaced due to damage, cracking, etc., since the optical component cannot be disassembled, only the entire optical component fixing device can be replaced, resulting in resources. Waste, in addition, when the optical device is a projector using a laser as a light source and the optical element uses a diffusing sheet, the laser spot is concentrated, the optical power per unit area is high, and the diffusing sheet is directly bonded to the support by glue. Under the circumstance that the glue is exposed to strong light for a long time, the embrittlement of the glue is easy to cause the scattering sheet to fall off; in another case where the laser spot directly illuminates the fixed part of the fixed diffusion sheet, the fixed part is thermally deformed. Failure, causing the diffuser to be reliably fixed; therefore, the above Result from doing a fixed scattering sheet is not reliable, so that the projector does not work.

Technical solution

In order to overcome the deficiencies of the prior art, it is an object of the present invention to provide a detachable, fixed and reliable optical component fixing device for an optical component in an optical component fixing device, and another object of the present invention is to provide a Optical device for optical component fixtures.

As an object of the present invention, an optical component fixing device is provided, comprising: a support plate provided with a stepped hole, the stepped hole penetrating through the opposite first side and the second side of the support plate, the stepped hole including the first hole and the first a second hole, the first hole penetrates the first surface, the second hole penetrates the second surface, the first hole transitions from the step surface to the second hole, the second hole has a larger cross section than the first hole; the first hole forms a beam path, The second hole is for accommodating the optical component; the optical component fixing device further comprises a fixing component, the fixing component comprises a fixing portion and the elastic arm, the fixing portion is fixed on the second surface, and the elastic arm is connected to the fixing portion and faces the stepped surface of the stepped hole The direction extends, and the stepped surface and the resilient arm respectively press the optical element from opposite sides of the optical element.

Further, the step surface is provided with a boss, and the boss and the elastic arm respectively press the optical element from opposite sides of the optical element.

Further, the boss comprises a pair of oppositely disposed first bosses, the fixing member is an integrally formed first fixing member, the first fixing member comprises a body surrounding the second hole, and the stepped hole is provided in a middle portion of the body Correspondingly, the first fixing member has a pair of elastic arms connected to the body and corresponding to the pair of first bosses, and the supporting plate is provided with at least two connecting holes, and the fixing portion of the first fixing member is opened on the body An opening corresponding to the connecting hole, the connecting hole and the opening are fixedly connected by the connecting member, and the first fixing member is detachably fixed to one side of the second surface.

Further, the boss includes a pair of opposite first bosses, and the fixing member is a pair of second fixing members corresponding to the first bosses, each of the second fixing members has a fixing portion and a resilient arm. The support plate is provided with a pair of connecting holes, and the fixing portion is an opening corresponding to the connecting hole. The connecting hole and the opening are fixedly connected by the connecting member, and each of the second fixing members is detachably fixed to one side of the second surface.

Further, the peripheral wall of the second hole is provided with a slot corresponding to the first boss, and the elastic arm includes a connecting portion respectively connected to the fixed portion and the free end, and the slot allows the connecting portion or the free end to enter therebetween.

Further, the peripheral wall of the second hole is provided with at least one limiting protrusion.

Further, the second hole is a substantially rectangular hole, the second hole has a first peripheral wall, a pair of second peripheral walls and a third peripheral wall, and a pair of second peripheral walls of the second hole are respectively provided with a finite protrusion, two The limiting protrusions on the second peripheral wall are for abutting against the opposite sides of the optical element, respectively.

Further, the third peripheral wall of the second hole is provided with a finite protrusion, and the limiting protrusion and the first wall on the third peripheral wall are respectively abutted against the opposite side faces of the optical element.

Further, the first hole is a rectangular hole, the first hole has a first peripheral wall, a pair of second peripheral walls and a third peripheral wall, and the first peripheral wall of the first hole and the first peripheral wall of the second hole are mutually Aligning, a pair of first bosses respectively extend along a pair of second peripheral walls of the first hole, the pair of first protrusions are symmetrically arranged with respect to a central axis of the first hole, and the step surface is formed by the second peripheral wall of the first hole And the third peripheral wall extends toward the second peripheral wall and the third peripheral wall of the second hole.

Further, the free end of the resilient arm is a hook portion having a curved section for pressing the optical element against the first boss, and the elastic arm is located on the rear side of the optical element in the optical path.

Further, the stepped surface is further provided with a second boss. The second boss is located between the third peripheral wall and the second hole of the first hole. Correspondingly, the first fixing member further comprises another elastic arm, and the elastic arm The free end is corresponding to the second boss.

Further, the stepped surface is further provided with a second boss, and the second boss is located between the third peripheral wall and the second hole of the first hole, and correspondingly, the optical component fixing device further comprises a second fixing component. The free end of the elastic arm of the other second fixing member is disposed corresponding to the second boss.

Further, the second boss extends along the third peripheral wall of the first hole, and the second boss and the pair of first bosses are equilateral or isosceles triangles with respect to the step surface.

Further, the optical element comprises a diffusing sheet, a filter or a dichroic sheet.

As still another object of the present invention, there is provided an optical apparatus comprising the above-described optical element fixing device.

Further, the optical device is a projector, the projector comprises a square bar, the optical element is a diffusing piece, and the diffusing piece comprises a first surface and a second surface disposed opposite to each other, the first surface facing the first hole and facing the second surface of the square bar It is the light-emitting surface of the diffusing sheet.

Beneficial effect

Beneficial effects:

The utility model provides an optical component fixing device. The optical component fixing device comprises a support plate and a fixing member. The support plate is provided with a stepped hole including a first hole and a second hole, and the stepped hole penetrates the opposite first of the support plate. The face and the second face have a second hole having a larger cross section than the first hole. The first aperture forms a beam path and the second aperture is for receiving an optical element. By the relatively fixed arrangement of the support plate and the fixing member, the elastic arm of the fixing member and the step facing the opposite sides of the optical element are pressed, so that the optical element can be fixed between the support and the fixing member, thereby avoiding the optical element The position of the optical element brought about by the glue bonding is not adjustable, cannot be replaced alone, and the glue is embrittled by strong light, which causes the optical element to fall off. For the second hole for accommodating the optical element, the peripheral wall of the second hole can limit the optical element, thereby ensuring that the optical element is well received in the second hole, and the peripheral portion of the second hole serves the optical element The protection of the optical component reduces the possibility of collision of the external component and facilitates the mounting of the optical component.

The optical device provided by the present invention can effectively ensure the normal operation of the optical device because the optical component in the optical component fixing device is detachably and reliably fixed.

DRAWINGS

1 is a schematic exploded view of a first embodiment of an optical component fixing device of the present invention;

Figure 2 is a schematic structural view of the support of Figure 1;

Figure 3 is a schematic structural view of the first fixing member of Figure 1;

4 is a schematic exploded view of the second embodiment of the optical component fixing device of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be further described in detail below with reference to the specific embodiments and drawings.

An optical component fixing device provided by the utility model comprises a support plate and a fixing member, wherein the support plate is provided with a stepped hole including a first hole and a second hole, the stepped hole penetrating through the opposite first side and the second side of the support plate The first hole extends through the first surface, and the first hole forms a beam path. a second hole penetrating the second surface, a second hole having a larger cross section than the first hole, the second hole for accommodating the optical element, in particular, the peripheral wall of the second hole and the optical element are preferably gap-fitted, The peripheral wall of the two holes defines the position of the optical element in the second hole, and the peripheral wall of the second hole can provide guidance during the process in which the optical element is mounted into the second hole, facilitating the mounting of the second hole. The stepped hole includes a stepped surface that transitions from the first hole to the second hole, the stepped surface is preferably a plane, and the stepped surface is parallel to the first face and the second face, respectively. The fixing member comprises a fixing portion and a resilient arm, and the fixing portion is fixed on the second surface, that is, preferably, the fixing portion is directly fixed on the second surface, for example, the fixing member and the supporting plate pass through the connecting member (hereinafter, The direct connection of the description is to achieve that the fixing portion is fixed to the second surface. In addition, in order to achieve the same technical effect that the fixing portion is fixed on the second surface, the fixing portion can also be fixed relative to the supporting plate. For example, the fixing portion and the supporting plate are respectively fixedly connected with the intermediate member, so that the fixing member and the supporting plate are respectively Indirectly fixed, the intermediate members may be the same or different two or more, and the relative positions of the fixing portion and the supporting plate are kept unchanged, thereby also fixing the fixing portion to the side of the second surface. purpose. The elastic arm of the fixing member is connected to the fixing portion and extends toward the step surface of the stepped hole, and the elastic arm and the fixing portion are connected to each other in a one-to-one correspondence, or the number of the elastic arm and the fixing portion is different. Correspondingly, as long as the connection between the elastic arm and the fixing portion can realize the action of the fixing member, the fixing portion may be an opening with a smooth inner wall or a threaded inner wall. The elastic arm is elastically deformable to press the optical element for accommodating in the second hole against the step surface by the free end thereof, and the optical element is preferably a biplanar sheet shape. The inclusion of the optical element in the second hole includes both the optical element being housed in the second hole and the optical element being partially received in the second hole. In addition, it is preferable to provide a boss on the step surface, so that the boss and the elastic arm respectively press the optical element from opposite sides of the optical element, and by setting the optical element directly to the step surface, the optical The area of contact between the component and the boss is smaller, and the area of the step surface is larger and it is difficult to be processed flat. In comparison, the processing of the boss is easier to obtain a higher flatness, so the processing precision is lowered and the optical component is improved. Positioning accuracy. In the case where a boss is provided on the step surface, the number of the elastic arms has a certain correspondence with the number of the bosses. For example, when the boss is an integral circular ring or a rectangle, the elastic arms can be set to two or more. And preferably, the elastic arms are arranged such that their free ends are uniformly projected on the bosses. At this time, the number of the elastic arms is larger than the number of the bosses; in addition, the elastic arms can also be set as a whole and elastic The free end of the arm encloses a circular or rectangular shape corresponding to the above-mentioned boss. At this time, the number of the elastic arms is equal to the number of the bosses. When the bosses are two or more and preferably distributed in a certain symmetrical relationship on the step surface, the elastic arms are also set to two or more corresponding to the bosses. In this case, the number of the elastic arms is equal to The number of bosses. Regardless of the number of resilient arms, there is a gap between the free ends of the resilient arms for the passage of light through the optical elements, thereby ensuring that the respective resilient arms, particularly the respective ends, do not obstruct the light generated in the optical device.

According to the above description, the support plate and the fixing member of the optical component fixing device are disposed to be relatively fixed, so that when the elastic arm of the fixing member and the step face the optical member for receiving in the second hole of the support plate, the opposite sides are performed. Compressed, the optical element is detachably fixed between the support plate and the fixing member, so that the position of the optical element can be easily adjusted, the optical element can be replaced separately, and the optical element is fixed by using a mechanical structure. It solves the technical problem that the chemical substance cannot directly fix the optical element due to embrittlement caused by light, especially strong light, when the chemical substance such as glue is directly fixed to the optical element.

The above specific embodiment of the optical element fixing device will be described in more detail below by taking two specific embodiments as an example.

Embodiment 1

Referring to Figures 1 through 3, in the present embodiment, the optical component securing device employs a support 100 that includes a support plate 110. It will be appreciated that the support plate can also be a separate, separate component. The support plate 110 has a stepped hole including a first hole 111 and a second hole 112. The stepped hole penetrates the opposite first and second faces of the support plate 110, wherein the first hole 111 penetrates the first face, and the second hole 112 Through the second side, the first hole 111 forms a beam path, the second hole 112 is for accommodating the optical element 300, and the first hole 111 and the second hole 112 are transitioned by the step surface 113, and the step surface 113 is preferably a plane. The step surface 113, the first surface of the support plate 110, and the second surface of the support plate 110 are parallel to each other. The cross section of the second hole 112 is larger than the cross section of the first hole 111, and the cross section can be understood as a cross sectional area obtained perpendicular to the center line of the hole, so that the step surface 113 between the first hole 111 and the second hole 112 can be accommodated. The optical element 300 in the second aperture 112 is supported and pressed. The optical component fixing device further includes a fixing member, which is an integrally formed first fixing member 200. Preferably, the first fixing member 200 is a sheet metal member, and the first fixing member can be detachably assembled in the second hole. The first fixing member 200 includes a body 210 that can surround the second hole 112 of the support plate 110. For example, the body 210 has a substantially square shape, and a central portion of the body 210 is disposed corresponding to the stepped hole. The opening 220 is for the light to enter or exit with respect to the optical element 300 that is fixed in the optical component fixture. In order to detachably fix the fixing portion and the supporting plate 110, the supporting plate 110 is provided with at least two connecting holes 114. The position of the connecting hole 114 can be set as needed, and is preferably disposed to be the opening 220. In the symmetrical position centered on the center line, the fixing portion of the fixing member is an opening 230 formed in the body 210 and corresponding to the connecting hole 114. In addition, in order to fix the support 100 to the optical device to which it is mounted, the support 100 may further be provided with a bottom plate 120, and a connection hole 114 for fixing to the optical device is opened on the bottom plate 120, and then the two are fixed by the connecting member. The opening 230 may be a light hole or a threaded hole. However, since the sheet metal member is generally thin, when the first fixing member 200 is a sheet metal member, the opening 230 is set as a light hole, and the connecting hole 114 is provided to be continuous. Or a cut-off internal threaded hole. The connecting hole 114 of the support plate 110 and the opening 230 of the first fixing member 200 are directly fixed by a connecting member (not shown), and the connecting member may be a bolt, a screw or the like. In order to position the optical element in the second hole more accurately and reduce the requirement for the processing accuracy of the step surface, a pair of oppositely disposed first bosses 115 are disposed on the step surface 113, correspondingly, the first fixing member The elastic arm 240 of the 200 is disposed as a pair corresponding to the first boss 115, and each of the elastic arms 240 is connected to the body 210. The free end 241 of the elastic arm 240 is connected to the opening 230 as a fixing portion, and the connection may be a resilient arm. The number of the elastic arms is greater than the number of the fixed portions, that is, the number of the elastic arms is greater than the number of the fixed portions, and the elastic arms and the fixed portions are connected by the body. When the first fixing member 200 is directly fixed to the supporting plate 110, the free end 241 extends in the direction of the first boss 115, and the elastic arm 240 is an elongated cantilever having a certain elastic deformation capability, and the elastic arm 240 The free end 241 is located within the range of the opening 220 and extends through at least one corner toward the opening 220, that is, when the fixing member is directly fixed to the support plate 110, without the optical component 300 being fixedly mounted, The free end 241 abuts the first boss 115 or the maximum gap between the free end 241 and the first boss 115 is smaller than the thickness of the optical element 300, that is, the free end 241 is in contact with the first boss 115 or the free end 241 is firstly convex. The table 115 is pressed, and the at least one corner can bring better elastic deformation characteristics to the elastic arm 240. In the process of fixing the optical component 300, the optical component 300 is first disposed in the second hole 112, and the optical component 300 is The second hole 112 is preferably a clearance fit, and the first fixing member 200 and the support plate 110 are fixed together by the connecting member, and each of the elastic arms 240 is further pressed to be elastically deformed after contacting the optical component 300, and each is elastically deformed. The end 241 applies an elastic force to the optical element 300 toward the first boss 115, and presses the optical element 300 against the first boss 115, so that the first boss 115 corresponding to each other and the free end 241 of the elastic arm respectively The optical element 300 is pressed against the opposite sides of the optical element, thus ensuring the fixation of the optical element 300. Since the elastic arm 240 can be elastically deformed, the optical element 300 can be provided with a certain moving space away from the first hole 111, thereby avoiding the action of the non-elastically deformable fixing member when the optical element 300 is subjected to strong light and is thermally expanded. The crush is damaged. A gap is provided between each of the free ends 241 for the light to enter or exit through the optical element 300. It should be noted that since the stepped hole in the embodiment includes the first hole 111 and the second hole 112, one optical element 300 can be fixed in the second hole 112 when two or more optical elements 300 need to be disposed. Correspondingly, three or more holes are sequentially arranged from the first side to the second side of the support plate in an axial direction perpendicular to the first face of the support plate 110, and the cross-section of each hole is gradually increased, and the holes are respectively The projections in the direction of the optical path are not completely coincident, and a boss is disposed on the step surface 113 between the adjacent holes, and each of the bosses is disposed on the non-coincident portion of the projection where the step surface is located, and the first fixing member is disposed. An elastic arm corresponding to the number of bosses. In addition, in order to provide a relatively uniform supporting force to the optical element, when the number of the bosses is set to exceed the number required for the fixed optical elements, the elastic arms may not be disposed in one-to-one correspondence with the bosses.

Further, the peripheral wall of the second hole 112 is provided with a slot 112D corresponding to the first boss 115. The elastic arm 240 includes a connecting portion 242 respectively connected to the fixed portion and the free end 241, and the slot 112D allows the connecting portion 242. Or the \ and the free end 241 enter therebetween, and by providing the slot 112D corresponding to the first boss 115, the non-interference space can be provided for the elastic arm 240 to extend away from the opening 220 and the elastic arm 240 to be elastically deformed.

In order to provide better guiding and positioning for the optical element to be placed in the second hole and after the optical element is fixed to the second hole, the peripheral wall of the second hole is provided with at least one limiting protrusion, the limiting protrusion preferably The end of the limiting protrusion formed integrally with the second hole has a curved surface protruding toward the center of the second hole, and the curvature of the curved surface can be set to be small, thereby facilitating the approach of the optical element to the peripheral wall of the second hole At the point of contact.

As a specific embodiment of the shape of the second hole 112, the second hole 112 in the first embodiment is disposed as a substantially rectangular hole, and the second hole 112 has a first peripheral wall, a pair of second peripheral walls and a third peripheral wall. Two pairs of limiting protrusions 112E are symmetrically disposed on the pair of second peripheral walls 112B of the second hole, and the two pairs of limiting protrusions 112E may be integrally formed with the second holes. Specifically, the two pairs of the limiting protrusions 112E are symmetrically arranged centering on the center line parallel to the short side of the cross section of the second hole 112, and the two pairs of the limiting protrusions 112E are optical elements disposed in the second hole 112. The opposite sides of the 300 provide symmetric positioning close to the point contact, which can limit the movement of the optical element in the direction of any one of the second peripheral walls of the pair of second peripheral walls 112B, thereby being relative to the case where the second peripheral wall is a unitary plane The utility model can effectively prevent the optical component from simultaneously aligning the plane of the pair of second peripheral walls to be limited in the installation efficiency of the second hole, and can reduce the entire peripheral wall of the optical element and the second hole. Contact, to avoid damage to the optical component due to machining error or thermal expansion, and large deformation of the peripheral wall. Moreover, since the machining limit projection is easier to obtain higher machining accuracy than the machining plane, it is reduced. The manufacturing cost also makes the limit of the optical element in the second hole more accurate. It should be noted that the position and the number of the limiting protrusions may be flexibly set according to the shape and size of the second hole and the optical element. For example, it is further known that the limit may be set on the third peripheral wall of the second hole. Positioning protrusions, the limiting protrusions on the third peripheral wall of the second hole and the first wall are respectively abutting with opposite side faces of the optical element, and the limiting protrusions on the third peripheral wall can also serve the second The action of the limiting protrusion on the second peripheral wall of the hole, in addition, the above-mentioned limiting protrusion can be used to limit the position of the optical element in the second hole, not to emphasize that the optical element is in the second hole Always keep in contact with the limit protrusions.

1 and 2, the shape of the first hole 111 is set as a rectangular hole, so that the first hole can be made similarly to the second hole, thereby reducing the manufacturing cost. In addition, the first hole and the above The shape of the second hole may also be a circular hole, a square hole or the like. The first hole 111 has a first peripheral wall, a pair of second peripheral walls and a third peripheral wall corresponding to the second hole 112, and the respective first peripheral walls 111A and 112A of the first hole 111 and the second hole 112 are aligned with each other a pair of first bosses 115 respectively extend along a pair of second peripheral walls 111B of the first hole 111, and the step surface 113 is formed by the second peripheral wall 111B of the first hole 111 and the third peripheral wall toward the second hole The second peripheral wall 112B and the third peripheral wall 112C of the 112 extend, and each of the first bosses 115 protrudes from the stepped surface 113 and is located at a second peripheral wall 111B of the first hole 111 and a second peripheral wall 112B of the corresponding second hole 112. Between the pair of first protrusions 115 being symmetrically arranged with respect to the center line of the first hole 111, preferably, the first boss 115 has a semi-elliptical cross section, and the first boss 115 is for supporting the optical element 300. The surface is a facet that fits the fit of the contact surface of the sheet-shaped optical element. Since the first boss 115 is disposed such that one of its extended faces is flush with the second peripheral wall 111B, it can facilitate the forming of the first boss 115, and since the first boss and the second boss are to be The description is made to be independent and small in size, compared to a whole circular or rectangular boss, which saves material and overcomes that all the surfaces of the above-mentioned convex surfaces are located in the same The more difficult the machining accuracy of the plane is, the correspondingly, the contact area between the optical component 300 and the fixture is reduced, the heat transfer of the optical component to the fixture is reduced, and the degree of heat of the elastic arm is reduced.

As a specific structure of the elastic arm 240, in one embodiment of the elastic arm 240, the free end 241 of the elastic arm 240 is provided as a hook portion 241A having a curved section for pressing the optical element 300 against On a boss 115, the resilient arms 240 are located on the optical path of the optical element 300 on the optical path (as indicated by the arrows in FIG. 1). By contacting the optical element 300 with the curved section of the resilient arm 240 to provide an elastic deformation force, the contact faces of the two can be increased to avoid damage to the optical component 300 by the resilient arm 240, and since the resilient arm 240 is located on the optical component 300 in the optical path. On the rear side, the light incident on the optical element 300 does not directly strike the elastic arm 240, and the elastic arm 240 is prevented from being properly fixed due to thermal deformation failure. In addition, for the elastic arm of the second fixing member (which will be described in detail below), the elastic arm can also be similarly arranged, and the above technical effects can be obtained correspondingly.

In order to provide better fixing of the optical element 300, a second boss 116 is further disposed on the step surface 113, and the second boss 116 is located at the third peripheral wall 111C and the second hole 112 of the first hole 111. Correspondingly, the first fixing member 200 further includes a resilient arm 240 corresponding to the second boss 116. By providing the second boss 116, the first boss 115 and the second boss 116 provide three points of fixation compared to the two points provided by the pair of first bosses 115, thereby fixing the optical component 300. Further, and three points can determine a plane, therefore, after the optical element 300 is fixed to the optical element fixing device, it can be ensured that the optical element 300 is positioned such that the plane position where it is located and the above-mentioned light ray are within the required range. . In addition, as a processing and forming method, the first hole 111 and the second hole 112 are disposed as a substantially rectangular hole. The support 100 may be cast to form a through hole of the same size as the first hole 111, and then The second opening 230, the first boss 115, the second boss 116, the limiting protrusion 112E and the slot 112D are turned by the cutter along the step surface 113, and the second opening 230 is provided for the convenience of the tool cutting. A rounded corner is formed at each of the intersections, and thus the first hole is a rectangular hole, and the second hole is a substantially rectangular hole in which a groove, a limiting protrusion, and a rounded corner are formed.

Preferably, the second boss 116 extends along the third peripheral wall 111C of the first hole 111, which can facilitate the processing of the second boss 116, and the second boss 116 and the pair of first protrusions The stage 115 is equilaterally or isosceles-triangularly distributed with respect to the step surface 113, that is, the line connecting the second protrusion 116 with the center point of the pair of first protrusions 115 projected on the step surface 113 forms an equilateral or the like. The waist triangle, according to the principle that three planes can determine a plane, can not only better position the optical component 300 on a desired plane, but also make the elastic arm 240 have the same force on the optical component 300, the entire optical component. 300 is evenly stressed.

Embodiment 2

The main difference between the second embodiment and the first embodiment is that the fixing member in the second embodiment is a separate component. Therefore, the following mainly describes the fixing member and the variation of the supporting plate structure. The structure of the first embodiment can be similarly applied to the structure of the second embodiment. Reference may be made to the structure of the second embodiment, and the same reference numerals are used in the same structure as in the first embodiment.

Referring to FIG. 4, the fixing member of the optical component fixing device of the present embodiment is a pair of second fixing members 200' disposed corresponding to the pair of first bosses 115, each of the second fixing members 200' having a fixing portion and an elasticity. The arm 240', the support plate 110 is provided with a pair of connecting holes 114', wherein the fixing portion 220' is an opening 230' corresponding to the connecting hole 114', and the connecting hole 114' and the opening 230' are fixedly connected by the connecting member, and the elastic The free end 240' of the arm is connected to the opening 230' as a fixing portion, that is, the elastic arm is connected to the same number of the fixing portion, and the elastic arm and the fixing portion are formed correspondingly on the same part. The number of the first bosses 115 and the second fixing members 200' can be set according to actual needs. The position of the connecting hole 114' can be set as needed, preferably symmetrically centered on the center line of the stepped hole, and the second fixing member 200' is preferably a sheet metal member. Compared with the fixing member in the first embodiment, the second fixing member 200' which is separately manufactured in the embodiment can reduce a certain material, and the elastic arm 240' of the second fixing member 200' is opposite to the optical member. The elastic force applied by 300 can be relatively independent, and the distribution of the first boss 115' and the elastic arm 240' can be flexibly designed according to the position of the different optical elements 300 to be fixed by the elastic arm 240', and is suitable for corresponding to Each portion of the resilient arm 240' has an optical element 300 of a different degree of force.

In order to provide better fixing of the optical component 300, a second boss is also provided on the step surface of the support plate 110' (refer to the second boss 116 in FIG. 2), and the second boss is located in the first hole. Between the third peripheral wall and the third peripheral wall of the second hole, correspondingly, a second fixing member 200' corresponding to the second boss is further disposed, and the second fixing member is further disposed on the supporting plate 110'. 200' opening 230' The connecting hole 114' fixedly connected by the connecting member can be better ensured that the optical member 300 is fixed by the elastic arm 240' of the second fixed member 200' added to the second protruding portion. Expected in-plane.

The optical element 300 of each embodiment of the first embodiment and the second embodiment is a diffusion sheet, a filter or a dichroic color sheet. Therefore, the optical element fixing device can be such a thin film and generally has a rectangular shape. The components provide a detachable, reliable and secure attachment.

The present invention also provides an optical device including a projector, a camera, a microscope, etc., the optical device adopting the optical element fixing device embodiment of any of the above embodiments, with reference to the optical component fixing device described above The advantage is that the position of the optical element of the optical component fixture in the optical device is detachably and reliably fixed, thereby ensuring good performance of the optical device.

More specifically, in one embodiment in which the optical device is a projector, the projector includes a square bar 400, the optical element 300 is a diffusing sheet, and the diffusing sheet includes a first surface and a second surface disposed opposite to each other, the first surface facing the first The second surface of the square bar 400 is a light exiting surface of the diffusing sheet. Therefore, the elastic arms 240, 240' are located on the optical path (refer to the arrows in FIGS. 1 and 4) on the rear side of the square bar 400, and the light incident on the square bar 400 is not directly transmitted to the elastic arms 240, 240. 'Up, thereby avoiding the failure of the elastic arm to be properly fixed to the optical element 300 due to thermal deformation failure.

In the above description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "the axis perpendicular to the support plate" and the "center line" is based on the orientation, position or shape shown in the drawings, only For the convenience of the description of the present invention and the simplified description, rather than indicating or implying that the device or device referred to must have a specific orientation or a specific shape, it is not to be construed as limiting the present invention, when the above-mentioned axis or center line corresponds. In the case of irregularly shaped components, an adaptive understanding of the above-described axes and centerlines should be made in accordance with the inventive concepts of the present invention.

Moreover, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first", "second", and "third" may include one or more of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is three or more unless specifically and specifically defined.

The above is a further detailed description of the present invention in conjunction with the specific embodiments, and the specific implementation of the present invention is not limited to the description. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept.

Claims

An optical component fixing device, comprising:

a support plate, wherein the support plate is provided with a stepped hole, the stepped hole penetrating through the opposite first and second faces of the support plate, the stepped hole comprises a first hole and a second hole, the first a hole penetrating the first surface, the second hole penetrating the second surface, the first hole transitioning from the step surface to the second hole, the second hole having a larger cross section than the first hole a cross section; the first hole forms a beam path, and the second hole is for receiving an optical element;

a fixing member, the fixing member includes a fixing portion fixed to the second surface, the elastic arm connecting the fixing portion and extending toward a step surface of the stepped hole, The step face and the resilient arm respectively press the optical element from opposite sides of the optical element.

2. The optical component fixing device according to claim 1, wherein:

The step surface is provided with a boss, and the boss and the elastic arm respectively press the optical element from opposite sides of the optical element.

3. The optical component fixing device according to claim 2, wherein:

The boss includes a pair of oppositely disposed first bosses, the fixing member is an integrally formed first fixing member, and the first fixing member includes a body surrounding the second hole, and the body is The middle portion is provided with an opening corresponding to the stepped hole, and the first fixing member has a pair of the elastic arms connected to the body and corresponding to the pair of first bosses, the support plate is provided There are at least two connecting holes, and the fixing portion of the first fixing member is an opening formed on the body corresponding to the connecting hole, and the connecting hole and the opening are fixedly connected by a connecting member, The first fixing member is detachably fixed to one side of the second surface.

4. The optical component fixing device according to claim 2, wherein:

The boss includes a pair of oppositely disposed first bosses, the fixing member is a pair of second fixing members corresponding to the first bosses, and each of the second fixing members has one of the fixing portions And a resilient arm, the support plate is provided with a pair of connecting holes, the fixing portion is an opening corresponding to the connecting hole, and the connecting hole and the opening are fixedly connected by a connecting member, Each of the second fixing members is detachably fixed to one side of the second surface.

The optical component fixing device according to claim 3 or 4, wherein:

a groove corresponding to the first boss is disposed on a peripheral wall of the second hole, and the elastic arm includes a connecting portion respectively connected to the fixing portion and the free end, and the slot allows a connecting segment or And the free end enters between them.

The optical component fixing device according to claim 3 or 4, wherein:

The peripheral wall of the second hole is provided with at least one limiting protrusion.

7. The optical component fixing device according to claim 6, wherein:

The second hole is a substantially rectangular hole, the second hole has a first peripheral wall, a pair of second peripheral walls and a third peripheral wall, and the pair of second peripheral walls are respectively provided with a limited protrusion, the two The limiting protrusions on the second peripheral wall are for abutting against the opposite sides of the optical element, respectively.

8. The optical component fixing device according to claim 6, wherein:

A limiting protrusion is disposed on the third peripheral wall of the second hole, and the limiting protrusion on the third peripheral wall and the first wall are for abutting with opposite side faces of the optical element, respectively.

9. The optical component fixing device according to claim 6, wherein:

The first hole is a rectangular hole, the first hole has a first peripheral wall, a pair of second peripheral walls and a third peripheral wall, and the first peripheral wall of the first hole and the second hole The peripheral walls are aligned with each other, and the pair of first bosses respectively extend along a pair of second peripheral walls of the first hole, the pair of first protrusions being symmetrical with respect to a central axis of the first hole Arranged, the step surface extends from the second peripheral wall and the third peripheral wall of the first hole toward the second peripheral wall and the third peripheral wall of the second hole.

The optical component fixing device according to claim 3 or 4, wherein:

The free end of the resilient arm is a hook having a curved section for pressing an optical element against the first boss, the resilient arm being located on the rear side of the optical element in the optical path .

11. The optical component fixing device according to claim 3, wherein:

a second boss is further disposed on the step surface, the second boss is located between the third peripheral wall of the first hole and the second hole, and correspondingly, the first fixing component further includes Yet another of the elastic arms, the free end of the elastic arm is disposed corresponding to the second boss.

12. The optical component fixing device according to claim 4, wherein:

a second boss is further disposed on the step surface, the second boss is located between the third peripheral wall of the first hole and the second hole, and correspondingly, the optical component fixing device further comprises Further, the second fixing member has a free end of the elastic arm of the second fixing member corresponding to the second boss.

The optical element fixing device according to claim 11 or 12, wherein:

The second boss extends along the third peripheral wall of the first hole, and the second boss and the pair of first bosses are equilateral or isosceles triangles with respect to the step surface.

The optical element fixing device according to any one of claims 1 to 4, 11 or 12, wherein:

The optical element comprises a diffusing sheet, a filter or a dichroic sheet.

15. Optical equipment characterized by:

The optical device includes the optical element fixing device according to any one of claims 1-14.

16. The optical device of claim 15 wherein:

The optical device is a projector, the projector includes a square rod, the optical element is a diffusing sheet, and the diffusing sheet includes a first surface and a second surface disposed opposite to each other, the first surface facing the first The hole, the second surface facing the square bar is a light exiting surface of the diffusing sheet.