JP2008096649A - Mount structure for lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely hold a lens used for a magnifying glass lens or a magnifier or the like without dropping with simple structure when assembling the lens in a holding frame through an elastic mount. <P>SOLUTION: Three engaging projecting parts 11c are disposed at equal spaces at the outer periphery part of the elastic mount 11, and a lens housing groove 13 is formed at the inner periphery part of the elastic mount 11. The lens housing groove 13 and the engaging projecting parts 11c are arranged on the same plane C. By elastically engaging the engaging projecting part 11c in a lens attaching hole 10, and applying the compression stress of the engaging projecting part 11c to the inside in a radial direction of the elastic mount 11, so that a part of the elastic mount 11 is swollen and deformed in the lens housing groove 13 as a swollen and deformed part 11d. The outer periphery part of a magnifier lens 7 housed in the lens housing groove 13 is elastically supported by the swollen and deformed part 11d. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lens mounting structure in which a lens is mounted on a holding frame via an elastic mount, such as a magnifying glass stand or a loupe.

In a magnifying glass stand or magnifying glass using a lens, a configuration is known in which a lens is held on a holding frame formed of metal or hard synthetic resin via an elastic mount made of rubber or soft synthetic resin. Yes.
For example, in a magnifying glass stand, a magnifying glass with an illuminating lamp is provided in which an annular illuminating lamp is mounted inside an annular holding frame and a lens is arranged in a lens mounting hole formed in the center of the holding frame to constitute an illuminating lens unit. In a stand, a technique has been proposed in which an outer peripheral portion of the lens is held by an annular elastic mount, and the elastic mount is detachably engaged with the lens mounting hole to attach the lens (for example, Patent Document 1). reference).

  Further, in Patent Document 1, a lens circumferential groove for accommodating the outer periphery of the lens is formed in the inner periphery of the elastic mount, and the elastic mount is suspended by engaging the upper surface of the holding frame on the outer periphery of the elastic mount. The flange portion to be extended, or the upper and lower sides of the lens circumferential groove are opened, and the ring circumferential groove for engaging the locking ring is recessed on the opening side of the lens circumferential groove. A plurality of lenses and spacers are alternately mounted in the lens circumferential groove, and a locking ring is engaged with the ring circumferential groove to prevent the lens from coming off, or a ring is attached to the locking ring. An engaging portion that engages with the circumferential groove, and a lens receiving portion that supports the outer periphery of the lens inside the engaging portion, and the lens receiving portion is arranged with respect to the thickness of the engaging portion. It is described that it is deviated on either side.

Japanese Utility Model Publication No. 5-18729

  In Patent Document 1, such a lens is fixed to the elastic mount by a circumferential groove or a spacer, but it is stated that the elastic mount and the holding frame are merely engaged, and there is no fixed relationship. This is also because, in the examples of the specification of Patent Document 1, it is described that there is little risk of falling off because the usage pattern is in the vertical to horizontal range, and there is no problem in practical use. it is obvious.

However, in the magnifying glass stand as in Patent Document 1, the illumination lens unit remains to be used vertically, and the base of the holding frame is structured to be fastened around the axis of the support arm. If any external force is applied with the fastening force between the holding frame and the support arm weakened, the illumination lens unit will rotate around the axis of the support arm and turn upside down. When the magnifier stand is not used, the work table The illumination lens unit located above the lens may be moved backward, but if the illumination lens unit is flipped up vigorously, the illumination lens unit may be turned upside down. In either case, the lens and elastic mount May fall off the holding frame.
Further, in the loupe that the present invention is one of the objects to be implemented, since there is no limitation on the usage mode, there is a higher possibility that the elastic mount and the lens will fall off the holding frame.

In addition, when a plurality of lenses are used in the configuration of Patent Document 1, a so-called misalignment in which the center positions of the lenses deviate from each other due to manufacturing errors and assembly errors of the component parts. This causes a problem that the image of the viewed object is blurred or distorted.
The present invention has been made in the background of such circumstances, and the object of the present invention is to reliably hold the assembled state of the lens, the elastic mount, and the holding frame with a simple structure, and further to the assembly and disassembly. Therefore, it is desirable to provide a lens mounting structure that can be easily and reliably performed at low cost.

  In order to achieve the above-described object, according to the present invention, an annular elastic mount is attached to the outer peripheral portion of a lens, the elastic mount is accommodated in an annular holding frame by a rigid body, and the lens is interposed via the elastic mount. In the lens mount structure held by the holding frame, three or more engaging protrusions are arranged at equal intervals on the outer peripheral portion of the elastic mount, and a lens receiving groove is formed on the inner peripheral portion of the elastic mount, The lens receiving groove and the engaging protrusion are arranged on the same inner and outer surfaces, and the engaging protrusion is elastically engaged with the lens mounting hole, and the compressive stress of the engaging protrusion is changed to the radius of the elastic mount. A part of the elastic mount is bulged and deformed in the lens housing groove by being applied to the inner side in the direction, and the outer peripheral portion of the lens housed in the lens housing groove is supported by the bulged deformation portion. It is said.

  In the present invention, the thickness t1 of the engagement protrusion in the elastic mount axial direction and the thickness t2 of the lens receiving groove in the elastic mount axial direction can be set to a relationship of t1 ≦ t2. In the present invention, a plurality of lenses may be arranged in multiple stages on the elastic mount using the engaging protrusion and the lens receiving groove, respectively. Further, three or more engaging recesses are formed at equal intervals in the lens mounting hole, the engaging recesses are disposed on the same inner and outer surfaces together with the lens receiving groove and the engaging protrusion, and the engaging protrusion is The engaging recess can be elastically engaged.

  Furthermore, a second lens is disposed on the inner peripheral portion of the elastic mount via a second elastic mount, and three or more second engaging protrusions are provided on the outer peripheral portion of the second elastic mount. A second lens-accommodating groove that is arranged at equal intervals and accommodates the outer peripheral portion of the second lens in the inner peripheral portion of the elastic mount, and is provided on the same plane as the second engaging protrusion. The second engagement protrusion is elastically engaged with the inner peripheral portion of the elastic mount, and the compressive stress of the second engagement protrusion is applied to the inner side in the radial direction of the second elastic mount. A part of the elastic mount is bulged and deformed into the second lens housing groove as a second bulging deformation portion, and the lens accommodated in the lens housing groove at the second bulging deformation portion. You may make it support an outer peripheral part.

According to the present invention, the engagement protrusions are compressed and deformed by elastically engaging three or more engagement protrusions provided at equal intervals on the outer periphery of the elastic mount with a lens mounting hole or an engagement recess which is a rigid body. The elastic mount and the holding frame are securely assembled by the frictional force with the holding frame generated by the compression deformation. Since the engagement protrusion of the elastic mount has only a small area of a part of the elastic mount elastically engaged with the holding frame, it can be easily assembled and disassembled to the holding frame.
In particular, the lens in the elastic mount is mounted for the first time by the bulging deformation part in which the engaging protrusion is compressed by assembling the elastic mount inside the holding frame and a part of the elastic mount protrudes into the lens receiving groove. The lens receiving groove of the elastic mount is set to have a larger diameter than the lens. Therefore, when the lens is assembled to the elastic mount or removed by replacement or the like, these operations can be performed very simply because the lens receiving groove has a large diameter.

  The compressive stress generated in the engaging protrusion due to the elastic engagement with the holding frame causes the elastic mount on the inner side of the engaging protrusion to bulge and deform radially inward, and this bulging deformed portion protrudes into the lens receiving groove. The outer periphery of the lens housed in the lens housing groove is supported. Therefore, the lens is supported by the elastic mount without using a special structure or other members.

  Further, the compressive stress generated in each engaging protrusion acts evenly in the center direction of the lens through the bulging deformation portion of the elastic mount, and centers the lens in the center of the elastic mount. Therefore, when a plurality of lenses are incorporated in the elastic mount, the centers of these lenses are matched, thereby preventing misalignment.

Further, the thickness t1 of the engaging protrusion in the elastic mount axis direction is set to the relationship t1 ≦ t2 with the thickness t2 of the engaging recess in the elastic mount axis direction, that is, the thickness t1 of the engaging protrusion in the elastic mount axis direction. By setting the engagement concave portion to be equal to or smaller than the thickness t2 of the elastic mount in the axial direction, most of the deformed portion generated in the elastic mount due to the compressive stress of the engagement protrusion bulges into the lens receiving groove, and the like. Since it does not disperse in the direction of, it acts reliably as a lens mounting force.
When the thickness t1> thickness t2 is set, the compressive stress from the engaging protrusions is dispersed in portions other than the lens housing groove, and the compressive stress cannot be effectively used for holding the lens. This is not preferable because it causes various deformations.
By using three or more engaging protrusions and engaging recesses, the elastic stress of the engaging protrusions can be applied to the lens with an equal force, and the lens receiving groove surrounds the elastic mount. Or a plurality of recesses.

According to the lens mount structure of the present invention, the assembly and disassembly of the lens, the elastic mount, and the holding frame can be performed more reliably and easily than in the past, and in particular, the lens and the elastic mount are dropped from the holding frame. Can be reliably prevented, and can be widely applied to lens articles such as a magnifying glass stand and a magnifying glass, and a lens mounted on a holding frame via an elastic mount.
In addition, since the lens receiving groove of the elastic mount to which the lens is assembled has a larger diameter than the lens, the lens can be easily attached and detached in a short time. In addition, the connection between the lens and the elastic mount uses the compression deformation of the elastic mount engaging projection, and no special structure or other members are required. It is extremely simple and can be implemented at low cost.

In addition, by elastically engaging the engaging protrusion of the elastic mount with the engaging recess of the holding frame, it is possible to more reliably prevent the elastic mount and the lens from falling off the holding frame. Further, when a plurality of lenses are assembled in multiple stages on the elastic mount, the centers of these lenses are matched to prevent misalignment, so that it is possible to avoid blurring or distortion of the image passing through the lens as much as possible.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments in which the present invention is applied to a magnifier stand with an illumination lamp will be described below with reference to the drawings.
1 to 7 show a first embodiment, FIG. 1 is a sectional front view of essential parts of a magnifying lens, an elastic mount, and a holding frame, and FIGS. 2 and 3 are perspective views of a magnifying glass stand with an illumination lamp, respectively. 4 is a sectional front view of the illumination lens unit, FIG. 5 is a perspective view of the elastic mount, FIG. 6 is a sectional plan view of the magnifying lens and the elastic mount, and FIG. FIG.
8 is a cross-sectional front view of the main part of the magnifying lens, the elastic mount, and the holding frame showing the second embodiment, and FIG. 9 is a front cross-sectional view of the main part of the magnifying lens, the elastic mount, and the holding frame showing the third embodiment. 10 and 11 show a fourth embodiment, FIG. 10 is a cross-sectional front view of the illumination lens unit, and FIG. 11 is a cross-sectional front view of main parts of the magnifying lens, the elastic mount, and the holding frame.

The magnifying glass stand 1 with an illumination lamp shown in the first embodiment of FIGS. 1 to 7 has a support arm 4 projecting from a support column 3 erected on one end of a work table 2 so as to be movable in the vertical direction. An illumination lens unit 5 is attached to the support arm 4.
The illumination lens unit 5 is configured by integrally assembling a magnifying lens 7 and an annular illumination lamp 8 inside and outside an annular holding frame 6 pivotally attached to the tip of the support arm 4. The lamp holder 9 is used to support the shade 6a provided below the holding frame 6 so as to release the lower part. The magnifying lens 7 is detachably attached to the lens mounting hole 10 of the holding frame 6 via an elastic mount 11. It is assembled to.

  The holding frame 6 is formed of a rigid body such as metal or hard synthetic resin, and the elastic mount 11 is formed of an elastic material such as rubber or soft synthetic resin. The holding frame 6 has the inside of the cylindrical body 6b that bears the inner wall of the shade 6a as the lens mounting hole 10 described above, and a step portion 12 that accommodates the flange 11b of the elastic mount 11 is provided above the cylindrical body 6b. . The elastic mount 11 includes a cylindrical portion 11a and a flange 11b continuous to one end of the cylindrical portion 11a. The outer diameter of the cylindrical portion 11a is slightly smaller than the lens mounting hole 10 in the cylindrical body 6b. In addition, three engaging protrusions 11c are provided at equal intervals on the outer periphery of the substantially intermediate portion of the cylindrical portion 11a, and the lens receiving groove 13 is also provided at substantially the intermediate position of the inner peripheral portion of the cylindrical portion 11a.

The engaging protrusion 11c and the lens receiving groove 13 are located on a radial surface C intersecting the central axis O1 of the elastic mount 11, and the engaging protrusion 11c passes through the central axis O1 of the elastic mount 11. Further, the thickness t1 of the engagement projection 11c in the direction of the central axis O1 of the elastic mount 11 is greater than the thickness t2 of the lens receiving groove 13 in the direction of the central axis O1 of the elastic mount 11 disposed on the radial radial line D. Thinly formed.
Further, the engaging protrusion 11c has a length in the circumferential direction of the elastic mount 11, and the cross section in the direction of the central axis O1 of the elastic mount 11 is formed in a substantially semi-oval shape. The lens housing groove 13 is formed to have a slightly larger diameter than the magnifying lens 7, and when the magnifying lens 7 is housed, a gap C <b> 1 is set between the peripheral wall of the lens housing groove 13 and the outer peripheral portion of the magnifying lens 7. Is done.

  The distance from the central axis O1 of the elastic mount 11 to the outer surface of the engaging protrusion 11c is set to be longer than the radius of the lens mounting hole 10, and the elastic mount 11 is mounted in the lens mounting hole 10 and the flange 11b. Is accommodated in the step 12 of the holding frame 6, the engaging protrusion 11 c is elastically engaged with the lens mounting hole 10, and the magnifying lens 7 and the elastic mount 11 are detached from the lens mounting hole 10 of the holding frame 6. To prevent it. The removal of the lens 7 and the elastic mount 11 is performed in the reverse procedure.

  As described above, the holding frame 6 having the lens mounting hole 10 is formed of a rigid body such as metal, and the elastic mount 11 having the engaging protrusion 11c is formed of an elastic material such as rubber, so that the engaging protrusion 11c. The elastic deformation acts on the elastic mount 11 located inside the engaging protrusion 11c as a compressive stress on the radially inner side. As a result, a part of the elastic mount 11 protrudes into the lens housing groove 13 as a bulging deformed portion 11d, and fills the gap C1 to elastically hold the outer peripheral portion of the magnifying lens 7.

  In this way, the magnifying lens 7 is fitted in a so-called interference fit with the elastic force of the elastic mount 11 in the lens mounting hole 10 of the holding frame 6. In the normal usage mode shown in FIGS. 1, 2, and 4, the downward slip is prevented by the engagement between the flange 11b of the elastic mount 11 and the step portion 12 of the holding frame 6, and the lens mounting hole 10 Is prevented by the elastic engagement between the engaging projection 11 c and the lens mounting hole 10.

Further, as shown in FIG. 3, when the magnifying lens 7 is set up in the vertical direction and the object 14 is viewed, the magnifying lens 7 and the elastic mount 11 are dropped from the lens mounting hole 10 of the holding frame 6. Can be reliably prevented.
Further, the illumination lens unit 5 rotates around the axis of the support arm 4 and is turned upside down, or when the magnifying glass stand 1 is not used, the illumination lens unit 5 is pushed up to the rear of the work table 2 to illuminate the illumination lens unit 5. Even when the lens is turned upside down, the magnifying lens 7 and the elastic mount 11 are effectively prevented from falling off the lens mounting hole 10.

Since the compressive stress radially inward from each engaging protrusion 11c acts equally from the three bulging deformation portions 11d toward the central axis O1 of the elastic mount 11, the magnifying lens 7 has its center mounted on the elastic mount. 11 is held in alignment with the central axis O1.
In particular, in this embodiment, the thickness t1 of the engagement protrusion 11c in the elastic mount central axis O1 direction and the thickness t2 of the lens housing groove 13 in the elastic mount central axis O1 direction are set to satisfy the relationship of t1 <t2. Since all of the compressive stress of the engaging protrusion 11c protrudes into the lens receiving groove 13 as the bulging deformation portion 11d and does not disperse in the other direction, the compressive stress of the engaging protrusion 11c is reduced to that of the magnifying lens 7. Make sure it acts as a mounting force.

  Next, second to fourth embodiments of the present invention will be described. Note that, in the second to fourth embodiment examples, the same components as those in the first embodiment example described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment shown in FIG. 8, the flange 11b and the step portion 12 of the first embodiment are eliminated, and the same three engagements as the engagement protrusions 11c of the elastic mount 11 are inserted into the lens mounting hole 10 of the holding frame 6. The recesses 20 are provided at equal intervals, and the engagement protrusions 11c are elastically engaged with the respective engagement recesses 20, and the other configuration is the same as in the first embodiment.

  The elastic engagement between the engagement protrusion 11c and the engagement recess 20 applies a compressive stress of the engagement protrusion 11c to the inner side in the radial direction of the elastic mount 11 as in the first embodiment, and a part of the elastic mount 11 Is protruded into the lens housing groove 13 as a bulging deformation portion 11d, and the bulging deformation portion 11d is set to hold the outer periphery of the magnifying lens 7 housed in the lens housing groove 13.

  In the present embodiment, the magnifying lens is formed by elastically engaging the engaging protrusion 11c of the elastic mount 11 with the engaging recess 20 of the holding frame 6 while eliminating the flange 11b and the step portion 12 of the first embodiment. 7 and the elastic mount 11 are reliably positioned at a predetermined position of the lens mounting hole 10 of the holding frame 6, and the detachment of the magnifying lens 7 and the elastic mount 11 is effectively prevented.

  The third embodiment shown in FIG. 9 shows an example of a magnifying glass stand with a high magnification illumination lamp in which two magnifying lenses 7 and 7 are incorporated in the upper and lower stages inside the elastic mount 11. Similarly to the first embodiment, the lens 7 is assembled to the elastic mount 11 using the lens housing groove 13, and the elastic mount 11 including the magnifying lenses 7 and 7 is positioned on the outer side in the radial direction of each magnifying lens 7. The engaging projection 11c is elastically engaged with the lens mounting hole 10 and mounted on the holding frame 6.

The engagement protrusion 11c is elastically deformed radially inward by elastic engagement with the lens mounting hole 10, and applies a radially inner compressive stress to the elastic mount 11 positioned inside the engagement protrusion 11c. A part of the mount 11 is protruded into the lens receiving groove 13 as a bulging deformed portion 11d, and the outer peripheral portion of each magnifying lens 7 is supported.
Further, the compressive stress acting radially inward from each engaging protrusion 11 c acts from the bulging deformation portion 11 d toward the central axis O 1 of the elastic mount 11, so that both the magnifying lenses 7 and 7 are connected to the elastic mount 11. It supports so that it may align on the central axis O1. As a result, the centers of the magnifying lenses 7 and 7 are aligned with the central axis O1, and there are no problems such as image blurring or distortion due to misalignment.

  In the fourth embodiment shown in FIGS. 10 and 11, the magnifying lens 7 and the elastic mount 11 are used by using the engaging protrusion 11c, the bulging deformed portion 11d, the lens housing groove 13 and the like as in the first embodiment. The elastic mount 11 is further assembled with the second lens mounting hole 30 in the holding frame 6, and the second engagement recesses 31 are arranged at equal intervals above the magnifying lens 7 in the lens mounting hole 30. The second magnifying lens 32 is assembled to the engaging recess 31 via the second elastic mount 33.

The second elastic mount 33 is formed in a short cylindrical shape having no flange, and the same number of second engagement protrusions 33a as the engagement recesses 31 are arranged on the outer periphery thereof at equal intervals. A second lens housing groove 34 is provided around the periphery.
The second engaging protrusion 33a and the second lens receiving groove 34 are located on the radial surface E intersecting the central axis O1 of the first and second elastic mounts 11 and 32, and the second The engagement protrusion 33a is disposed on a radial radial line (not shown) passing through the central axis O1, and the thickness t1 of the second engagement protrusion 33a in the elastic mount central axis direction is The second lens housing groove 34 is formed thinner than the thickness t2 of the elastic mount in the central axis direction.

The second engaging protrusion 33a has a length in the circumferential direction of the second elastic mount 33, and the cross section in the direction of the central axis of the elastic mount is formed in a substantially semi-oval shape. 34 is formed to have a slightly larger diameter than the second magnifying lens 32, and when the second magnifying lens 32 is accommodated, the peripheral wall of the second lens accommodating groove 34 and the second magnifying lens 32 are formed. A gap is set between the outer periphery. The second elastic mount 33 to which the second magnifying lens 32 is attached is assembled to the elastic mount 11 by elastically engaging the second engaging protrusion 33 a with the second engaging recess 31, and the magnifying lens 7. Similarly to the elastic mount 11, even if it is turned upside down, it will not fall off.
The

  The distance from the central axis O1 of the second elastic mount 33 to the outer surface of the second engagement protrusion 33a is set to be longer than the radius of the second lens mounting hole 30, and the second engagement When the protrusion 33 a is elastically engaged with the second engagement recess 31 and the second elastic mount 33 is mounted in the elastic mount 11, the engagement is elastically engaged with the second engagement recess 31. The protrusion 33a applies a radially inner compressive stress to the second elastic mount 33 located inside thereof. As a result, a part of the second elastic mount 33 protrudes into the second lens housing groove 34 as the second bulging deformed portion 33b, and the bulging deformed portion 33b projects into the second lens housing groove 34. The outer peripheral part of the accommodated second magnifying lens 32 is supported.

  Further, the compressive stress acting radially inward from each second engaging protrusion 33a acts from the second bulging deformation portion 33b toward the central axis O1 of the second elastic mount 33, and the lower side Along with the magnifying lens 7, the center of the second magnifying lens 32 is supported so as to be aligned on the central axis O1. As a result, since the centers of both the magnifying lenses 7 and 32 coincide with the central axis O1, problems such as image blur and distortion due to misalignment are eliminated.

It is a principal part sectional front view of the magnifying lens, elastic mount, and holding frame which show the 1st example of the present invention. It is a perspective view of the magnifier stand with an illumination lamp which shows the 1st form example of this invention. It is a perspective view of the magnifier stand with an illumination lamp which shows the 1st form example of this invention. It is a cross-sectional front view of the illumination lens unit which shows the 1st form example of this invention. It is a perspective view of the elastic mount which shows the 1st form example of this invention. It is a section top view of a magnifying lens and an elastic mount which show the 1st example of the present invention. It is a principal part sectional top view of the magnifying lens, elastic mount, and holding frame which show the example of the 1st form of the present invention. The 2nd example of the present invention is the principal part section front view of the magnifying lens, elastic mount, and holding frame which shows the 2nd example. It is a principal part cross-sectional front view of the magnifying lens which shows the 3rd form example of this invention, an elastic mount, and a holding frame. It is a cross-sectional front view of the illumination lens unit which shows the 4th form example of this invention. It is a principal part sectional front view of the magnifying lens, elastic mount, and holding frame which show the 4th example of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Magnifier stand with an illumination light 2 ... Work table 4 ... Support arm 5 ... Illumination lens unit 6 ... Holding frame 7 ... Magnifying lens (lens of this invention)
DESCRIPTION OF SYMBOLS 8 ... Annular illumination lamp 10 ... Lens mounting hole 11 ... Elastic mount 11a ... Cylindrical part 11b ... Flange 11c ... Engagement protrusion 11d ... Projection deformation part 13 ... Lens accommodation groove 20 ... Engagement recess 30 ... Second lens attachment Hole 31 ... second engaging recess 32 ... second magnifying lens (lens of the present invention)
33 ... second elastic mount 33a ... second engagement protrusion 33b ... second bulging deformed portion 34 ... second lens receiving groove O1 ... central axis C, E ... central axis O1 of elastic mount 11 Radial plane C
C1: Clearance between the peripheral wall of the lens housing groove 13 and the outer peripheral portion of the magnifying lens 7 D: Radial line t1: Thickness of the engaging protrusion 11c in the direction of the elastic mount center axis t1: Second engaging protrusion 33a T2... Thickness of the lens housing groove 13 in the direction of the elastic mount center axis t2... Thickness of the second lens housing groove 34 in the direction of the elastic mount center axis

Claims (5)

In a lens mounting structure in which an annular elastic mount is mounted on the outer periphery of the lens, the elastic mount is accommodated in a lens mounting hole of a holding frame made of a rigid body, and the lens is held on the holding frame via the elastic mount. ,
Three or more engaging protrusions are arranged at equal intervals on the outer periphery of the elastic mount,
Forming a lens receiving groove in the inner periphery of the elastic mount;
The lens receiving groove and the engaging protrusion are arranged on the same surface inside and outside,
The engaging protrusion is elastically engaged with the lens mounting hole, and a compressive stress of the engaging protrusion is applied to the inner side in the radial direction of the elastic mount so that a part of the elastic mount bulges into the lens receiving groove. A lens mounting structure characterized by deforming and elastically holding an outer peripheral portion of a lens housed in the lens housing groove at the bulging deformation portion. 2. The lens according to claim 1, wherein a thickness t <b> 1 of the engagement protrusion in the elastic mount axial direction and a thickness t <b> 2 of the lens receiving groove in the elastic mount axial direction are set in a relationship of t <b> 1 ≦ t <b> 2. Mounting structure. The lens mounting structure according to claim 1, wherein the plurality of lenses are arranged in multiple stages on the elastic mount using the engaging protrusions and the lens receiving grooves, respectively. Provide the same number of engagement recesses as the engagement protrusions in the lens mounting hole,
The lens mounting structure according to claim 1, wherein the engagement protrusion is elastically engaged with the engagement recess. While disposing a second lens on the inner periphery of the elastic mount via a second elastic mount,
Three or more second engaging protrusions are arranged at equal intervals on the outer periphery of the second elastic mount;
A second lens receiving groove for receiving the outer peripheral portion of the second lens is provided on the inner peripheral portion of the elastic mount on the same plane as the second engaging protrusion;
The second engagement protrusion is elastically engaged with the inner peripheral portion of the elastic mount, and the compressive stress of the second engagement protrusion is applied to the inner side in the radial direction of the second elastic mount. A part of the elastic mount is bulged and deformed into the second lens housing groove as a second bulging deformation portion, and the lens accommodated in the lens housing groove at the second bulging deformation portion. The lens mount structure according to any one of claims 1 to 4, wherein an outer peripheral portion is supported.

Images