CN104820330B

CN104820330B - The filter glass maintaining body of optical filtering picture frame

Info

Publication number: CN104820330B
Application number: CN201410137023.7A
Authority: CN
Inventors: 高桥薫
Original assignee: Marumi Optical Co Ltd
Current assignee: Marumi Optical Co Ltd
Priority date: 2014-01-31
Filing date: 2014-04-04
Publication date: 2016-08-24
Anticipated expiration: 2034-04-04
Also published as: JP5577474B1; CN104820330A; KR101445525B1; JP2015143767A

Abstract

The present invention provides a kind of thin and that effective diameter is big filter lens maintaining body, it is possible to be fixed in optical filtering picture frame by filter glass in the case of not making filter glass deform.The corresponding back side at the filter glass embedding the rear being maintained at filter glass leading edge frame clamps the riveting tongue of this filter glass and forms circular cylindric ring bodies from supporting edge peripheral part, and, the cylindric ring bodies of this riveting tongue a length of, the chamfered section bearing surface of filter glass can be covered, and the length that the part the machined surface edge to antireflection overlay film at the filter glass back side is covered, wherein, antireflection overlay film is by overlay film processing and is formed at the filter glass back side.

Description

The filter glass maintaining body of optical filtering picture frame

Technical field

The present invention relates to the improvement of filter glass maintaining body in optical filtering picture frame.

The present invention provides the filter glass maintaining body in optical filtering picture frame, it is possible to by the optical axis side of optical filtering picture frame I.e. the filter thickness of picture frame of size upwards is formed thin, and, in the determined optical filtering of filter lens bore In mirror, the effective diameter being built in the filter glass in optical filtering picture frame is made to maximize.And, the present invention carries For a kind of optical filtering picture frame, even if the front side being arranged on telescope or wide-angle lens also not easily leads to vignetting (vignetting).And, the present invention provides a kind of riveting processing method, it is possible to by filter glass Put when being fixed in the case of being held in optical filtering picture frame, it is possible to not produce thing on this filter glass Reason deforms or is maintained in optical filtering picture frame by various filter glasss because heating the state of the deformation caused.

Background technology

The optical filtering picture frame of the present invention particularly relates to lens protection filter lens, circularly polarized light filter lens, light quantity Minimizing filter lens, bring the generating optical fringe effect filter lens of special-effect, can mildly manifest object The various filter glass maintaining bodies of the big digital camera of the value such as soft-focus filter lens.

Popularizing along with digital single lens reflex camera DSLR, it is possible to utilize view finder and liquid crystal panel the most true Recognize the using effect of filter lens while shooting, or various replacing camera lens is installed, at this replacing camera lens Lens barrel top ends the enjoyment having the filter lens of various effect to enjoy photographing unit shooting is installed.

But, for filter lens, built-in in optical filtering picture frame main body maintain the circle with various effect The filter glass of plate-like, is formed with placket frame portion in the incident illumination side of this optical filtering picture frame main body, at this placket On the inside diameter in frame portion, the exterior region from optical filtering picture frame main body is provided with for installing shade etc. towards rear Adnexa (attachment) or install the internal thread part of different filter lens for overlap, it addition, filtering The lens barrel side of picture frame main body is formed with rear cylinder frame portion, the outer diameter part in rear cylinder frame portion be provided with for The external thread part that the internal thread part of the installation set by lens barrel inside diameter is screwed.

Therefore, the size on the optical axis direction of optical filtering picture frame main body, i.e. the thickness of optical filtering picture frame main body is for setting Be equipped with the thickness in placket frame portion of described internal thread part, the thickness of filter glass, filter glass keep The thickness of endless loop and screw togather the thickness sum in rear cylinder frame portion on the inside diameter being arranged on lens barrel, The thickness making optical filtering picture frame of the prior art is thickening, therefore has the disadvantages that, i.e. when by this filter When light picture frame is arranged on the top ends of lens barrel to use, gradual halation phenomena can be produced.

It addition, filter lens needs have holding circle in filter lens bore determined optical filtering picture frame main body The mechanism of the filter glass of plate-like, it is known that this filter glass maintaining body uses following methods, such as, makes With filter lens keep by pressure ring and/or the method for ring spring (Ring Spring), or by right A part for the after-frame of filter glass carries out riveting the method etc. being fixed.And, by described Riveting carries out in the filter lens maintaining body kept, at the inside diameter of the incident illumination side of optical filtering picture frame main body It is provided with annularly prominent ring-type edge, embeds at the rear of this ring-type edge and filter glass is installed, Then utilize riveting mould or riveting heating tool that the rear circumference of this filter glass is riveted Processing, remains fixed at filter glass in optical filtering picture frame main body.

In the fixing means of the filter glass realized above by riveting processing, have the disadvantage in that and set After the ring-type edge of the inside diameter being placed in the incident illumination side of optical filtering picture frame main body is subject to be arranged on filter glass The shape of the riveting tongue in portion is processed, is carried out riveting outside dimension or the riveting of the riveting mould adding man-hour With the restriction of the outside dimension of heating tool, the effective diameter therefore limited by the ring-type edge of filter glass Reduce and generally diminish, even if thus specially optical filtering picture frame body making being obtained thin also due to filter glass Reducing of effective diameter and produce gradual halation phenomena.

Thus, at Japanese Patent Laid-Open 2010-113016 (hereinafter referred to as " patent documentation 1 ") Disclosed in have constitute optical filtering picture frame an example, described optical filtering picture frame have be not easy produce vignetting thin Type shape.In the explanation of the conventional example described in patent documentation 1, fix light about on optical filtering picture frame The method learning filter lens (filter glass), discloses the example using snap ring (by pressure ring), but It is that the shortening for the width dimensions of this snap ring exists the limit, further, it is difficult to as one man skiving is multiple many The gauge of the optical light filter of sample, accordingly, it is difficult to reduce the size of optical filtering picture frame.

And, in the invention of patent documentation 1, in order to solve the problems referred to above, photographing unit filter lens list Unit have tubular optical filtering picture frame, be fixed on the tubular of the inner side of described optical filtering picture frame filter lens retaining ring, It is maintained at the optical light filter of the inner side of described filter lens retaining ring and stops described optical light filter Movable front side stop part and rear side stop part, described front side stop part is formed at described filter lens and protects Holding the front-end edge of ring, described rear side stop part is formed at the end edge of described filter lens retaining ring or described filter The inner peripheral surface of light picture frame, described filter lens retaining ring and described optical light filter be not with from described optical filtering picture frame Before and after hold expose state configuration.

Therefore, in the invention of patent documentation 1, photographing unit with filter lens unit in the inner side of optical filtering picture frame It is fixed with filter lens retaining ring, maintains optical light filter in the inner side of this filter lens retaining ring.That is, use Optics filter it is not disposed in optical light filter being arranged on the parts on optical filtering picture frame i.e. filter lens retaining ring Before and after light microscopic, and it is disposed on the peripheral part of optical light filter.As a result, when not reveal from optical filtering picture frame When the state configuration filter lens retaining ring gone out and optical light filter, configuration optical filtering picture frame, filter lens with one heart Retaining ring and optical light filter, therefore, it is possible to the size on direction before and after reducing optical filtering picture frame.

But, conventional example is with the difference of the invention described in described patent documentation 1, conventional example Use snap ring is as the setting tool of optical light filter, and the invention of patent documentation 1 uses filter lens to keep Ring is as the setting tool of optical light filter, by the riveting utilizing projection and riveting metal die to carry out Optical light filter is fixed in described filter lens retaining ring by processing, and this filter lens retaining ring is fixed on optical filtering The inner side of picture frame.

Therefore, in the structure as described in the invention such as patent documentation 1, circular projection (front side is i.e. utilized Stop part) and annulus on caulking part (rear side stop part) be fixed on filter lens to by filter lens retaining ring In the structure that optical light filter in frame is fixed, only reduce and formed with by described projection and caulking part The equal size of the thickness of parts, it is impossible to enough skiving optical filtering picture frames the most significantly.

It addition, in the invention of patent documentation 1, the not mentioned as described below generation causing gradual halation phenomena Main cause, i.e. in order to incident illumination side keep optical light filter and use filter lens retaining ring, should Filter lens keeps hoop optical axis side prominent thus reduces the effective diameter of filter glass, and protects at filter lens Hold circular prominent to optical axis side of the front-end edge (in an embodiment of the present invention be referred to as exterior region) of ring to dash forward Acting the size of the effective diameter reducing filter glass, even if the most specially providing slim filter lens, having In filter lens bore determined optical filtering picture frame, the effective diameter of filter glass also can reduce, thus causes Gradual halation phenomena.

In accordance with the invention it is possible to obtain do not produce gradual halation phenomena slim optical filtering picture frame shape and The maximized optical filtering of effective diameter of filter glass can be made in filter lens bore determined optical filtering picture frame The shape of picture frame, and, the present invention provides a kind of riveting processing method, it is possible to solid in optical filtering picture frame When determining filter glass, not produce physical deformation or the state of deformation caused by heating on filter glass Lower filter glass is clamped in optical filtering picture frame, to achieve these goals, after being arranged on filter glass Structure and the shape of the riveting tongue of side become important, thus, disclose existing Japan related to this special The invention of profit document JP 2008-191412 publication (hereinafter referred to as " patent documentation 2 ").

That is, patent documentation 2 relates to being fixed by hot riveting in the lens frame main body being made up of synthetic resin The lens frame of lens, patent documentation 2 provides a kind of lens frame, it is possible to will be fixed in lens frame is saturating Mirror is fixed on picture frame in the case of not deforming.

The structure of the invention of patent documentation 2 shows the lens frame being made up of synthetic resin, has three and dashes forward Rise portion and three caulking parts, wherein, described jut in order to optics (lens) at optical axis direction On position, abut with a face of above-mentioned optics, therefore prominent to optical axis direction, Er Qiexiang Configuring with separating certain intervals mutually, described caulking part is to divide mutually with above-mentioned protuberance in the direction of the optical axis From mode configure, and for carrying out hot riveting in the way of clipping above-mentioned optics.

In the lens fixing means realized by hot riveting in the invention of patent documentation 2, in order to carry out Fix and on frame and lens, apply load, therefore, especially when lens are thin, there is problems with, i.e. Remain stress because of the hot riveting load that applied, even and if with when after riveting is fixing its The mode that change also continues to, is fixed in lens frame.Also need to solve problems with: i.e., in order to ensure frame Holding precision, more use and utilize the convex surface part of three positions to bear the holding structure in lens supports face, In this case, the deformation of lens face can be made further to become serious.

But, when the present invention is described, the structure of the patent documentation 2 paid close attention to is in Fig. 1 and Fig. 3 The cross sectional shape of the convex caulking part (1c) illustrated and the riveting mould (3) shown in Fig. 4 and Fig. 6 Cross sectional shape.In Fig. 1 of patent documentation 2, picture frame main body (1) is the cylinder being made up of synthetic resin Shape parts, have lens installation stage portion (1a), at this stage portion (1a) front side is circumferentially arranged On three at position be provided with three convex flat faces as the arc-shaped of location, lens axis direction protuberance Portion (1b), convex flat face (1b) of described three arc-shapeds forms an orthogonal with the optical axis plane, And configure with being separated by certain interval in the circumferential.Additionally, be additionally provided with: inside diameter (1d), it is possible to Seamlessly insert lens (2)；The convex of three arc-shapeds configured with being separated by certain interval in the circumferential Caulking part (1c), is separated along this inside diameter with convex flat face (1b), thick with the periphery of lens (2) Degree extends the most upward for carrying out the necessary sized riveted.(the with reference to patent documentation 2 0023 section)

Additionally, the convex caulking part (1c) corresponding with convex flat face (1b) is facial with convex flat in the circumferential (1b) it is positioned at same position, and the size (width) in circumference is the most roughly the same.But, convex flat Face (1b) circumference on size (width) can also with in the circumference of convex caulking part (1c) Size (width) is different.Additionally, the upper outer of convex caulking part (1c) forms to carry out riveting For micro-conical surface.(the 0024th section of patent documentation 2)

Lens frame (10) is carried out hot riveting by the riveting mould (3) shown in Fig. 4～Fig. 6, from And lens (2) are fixed in picture frame main body (1).This riveting mould (3) has whole in lower face side The plane caulking part (3a) that week is circular, has tapering (3b) in its periphery.Plane caulking part (3a) (Fig. 6) is formed by the circular plane vertical with optical axis.Carry out when utilizing riveting mould (3) During the hot riveting of picture frame (10), lens (2) are inserted into the picture frame master being arranged on assembly bench (4) The inside diameter (1d) of body (1), makes the lower surface (2b) of lens (2) abut to convex flat face (1b) On.In this condition, the front end of convex caulking part (1c) prominent and riveting from the circumferential surface of lens (2) Connect the amount that exposure is equal.The riveting mould (3) making heated condition sinks, thus utilizes plane The tip portion of caulking part (3a) heating convex caulking part (1c) is while pressing this convex caulking part (1c) Tip portion be conformed into claw-like, thus lens (2) are fixed in picture frame main body (1).? When carrying out this hot riveting, riveting plane caulking part (3a) and convex caulking part (1c) of mould (3) Abut.(the 0025th section of patent documentation 2)

In the lens frame (10) being fixed with lens (2), as shown in Fig. 7～Fig. 9, lens (2) Three positions of periphery by convex flat face (1b) and because of convex caulking part (1c) of picture frame main body (1) It is pressed front end (claw) clamping that there occurs thermal deformation.Accordingly, because except above three position Part beyond retained part (convex flat face (1b) and convex caulking part (1c)) will not be to lens (2) Effect plus-pressure, seldom there is the deformation caused by riveting in lens (2).(the 0026th of patent documentation 2 Section) (more than, with reference to the publication of patent documentation 2.Reference in bracket represents in patent documentation 2 Reference.)

Thus, in the invention of above-mentioned patent documentation 2 disadvantageously, three of periphery with regard to lens (2) For position, pressed Hair Fixer by convex flat face (1b) and the convex caulking part (1c) of picture frame main body (1) During heat deformation, add the week of the lens (2) being seamlessly inserted into man-hour in inside diameter (1d) in riveting The corner of edge is riveted tongue pressing, thus makes lens (2) deform because of riveting processing.It addition, The lens frame main body (1) the metal ring circle of aluminum or pyrite etc. being carried out machining and make also produces Identical phenomenon, and, have the disadvantage in that as described in above-mentioned patent documentation (2) by synthesis tree In the lens frame main body (1) that fat is constituted, it is structure saturating having and being fixed lens (2) by hot riveting Picture frame, sinks to utilizing plane caulking part (3a) to enter at the riveting mould (3) making heated condition Row heating is while pressing the lens (2) fixed when being deformed, via convex flat face (1b), convex Caulking part (1c) and inside diameter (1) are directly passed heat, thus lens (2) can occur thermal deformation.

It follows that Fig. 4 and Fig. 5 A, Fig. 5 B in the description of the present invention are for illustrating aluminum or pyrite Deng endless loop carry out cutting and the showing of filter glass maintaining body in the metal optical filtering picture frame that manufactures There is example.

Fig. 4 is the explanatory diagram of optical filtering picture frame main body and the installation site of lens barrel, and Fig. 5 A, Fig. 5 B use Maintaining body after the manufacturing process that existing filter glass maintaining body is described and processing, Fig. 5 A, Fig. 5 B is the A-A enlarged partial cross section of Fig. 4.

In the diagram, 51 represent optical filtering picture frame main body, and 52 represent filter glass, and 53 represent digital photographing Owner's body, 54 represent lens barrel, and centered by described optical filtering picture frame main body 51,55 represent incident illumination Side, 56 represent lens barrel side, and C represents optical filtering picture frame main body and the optical axis of lens barrel, and φ represents filter Light aperture of mirror.

And, about the filter glass 52 being built in described optical filtering picture frame main body 51, use lens to protect Protect with filter glass, circularly polarized light filter glass, light quantity minimizing filter glass, bring special-effect The various filters such as generating optical fringe effect filter glass, the soft-focus filter glass that can mildly manifest object Light eyeglass.

In Fig. 5 A, Fig. 5 B, 51 represent optical filtering picture frame main body, by the gold being made up of aluminum or pyrite The endless loop belonging to system carries out machining and manufactures.It addition, 52 represent filter glass, t represents filter lens The thickness of frame main body 51,55 represent the incident illumination side of optical filtering picture frame main body, and 56 represent optical filtering picture frame main body Lens barrel side, optical filtering picture frame main body 51 is integrally formed, and optical filtering picture frame main body is substantially divided Become two parts, using the part of incident illumination side 55 as placket frame 57, the part of lens barrel side 56 is made For rear cylinder frame 58.

Inside diameter 59 at the placket frame 57 of optical filtering picture frame main body 51 is provided with for installing shade etc. attached The internal thread part 60 of part, the threaded base portion at this internal thread part 60 is provided with escape 61.And, move back The structure of cutter groove 61 is, makes the external screw thread of screwed togather adnexa in the way of having gap and internal thread part 60 are screwed, and abut against with the stop surface 62 being arranged at threaded base portion, it is possible to so that described attached The external screw thread of part will not screw togather and mode that the internal thread part 60 of relative placket frame 57 can freely load and unload by tension Carry out screwing togather operation.

It follows that the peripheral part 63 at the rear cylinder frame 58 of optical filtering picture frame main body 51 arranges oriented lens barrel External thread part 64 during 54 installation, the threaded base portion at this external thread part 64 is provided with escape 65. And, the structure of this escape 65 is, makes external thread part 64 and the interior spiral shell of the lens barrel 54 screwed togather Stricture of vagina is screwed in the way of having gap, and abuts with the stop surface 66 being arranged at threaded base portion, thus can It is enough so that the external thread part 64 of optical filtering picture frame main body 51 will not screw togather and the most described lens barrel 54 by tension The mode that can freely load and unload of top ends carry out screwing togather operation.

It addition, 67 arrange oriented optical axis inside the described placket frame 57 intermediate engagement with rear cylinder frame 58 The ring-type filter glass holding ring portion 68 that C side is prominent, keeps the top of ring portion 68 at this filter glass Edge is provided with the filter glass leading edge frame 69 of filter glass 52.

In the rear portion (lens barrel side 56) of described filter glass leading edge frame 69, as shown in Figure 5A, Forming riveting tongue 70 by forming circular cutting slot 71, this riveting tongue 70 is in periphery top ends There is riveting auxiliary tapering 72, and this riveting tongue 70 is configured to ring-type centered by optical axis C Tubular, it addition, the inside diameter at the riveting tongue 70 of described tubular is formed and can be fitted together to filter glass 52 Filter glass fitting portion 73.

Filter glass by chimeric for filter glass 52 inside diameter being arranged on described filter glass fitting portion 73 Maintaining body is: utilize the tapering 75 of ring-type riveting mould 74 with caulking part 76 to riveting tongue The tapering 72 of 70 carries out pressurization makes it deform, thus as shown in Figure 5 B, the tapering to riveting tongue 70 The top ends of 72 carries out riveting processing, thus before filter glass 52 is clamped in described filter glass by formation Filter glass maintaining body between edge frame 69 and the riveting tongue 70 being riveted processing.

Thus, in the filter glass maintaining body in the existing optical filtering picture frame shown in Fig. 5 A, Fig. 5 B, Man-hour is added, due to riveting when utilizing riveting mould 74 that the top ends of riveting tongue 70 is carried out riveting Direct and the Later Zhou Dynasty, one of the Five Dynasties edge being arranged at filter glass 52 the corner 77(of the part of bending illustrates in figure 5b) Contact, adds man-hour carrying out riveting, and described corner 77 becomes fulcrum, and for carrying out riveting processing Pressurizing and deformation power also puts on filter glass exterior region 69, thus in order to carry out riveting processing, filter glass The filter glass of exterior region 69 and formation filter glass exterior region 69 keeps the thickness of ring portion 68 to be necessary for tool There is the firm shape of big thickness t2.

Therefore, the thickness t of optical filtering picture frame main body 51 be placket frame 57 be capable of internal thread part 60 He The thickness t1 of basic function (the screwing togather function and backstop function of female thread) of escape 61, rear cylinder frame 58 be capable of external thread part 63 and escape 65 basic function (externally threaded thread depth with only Gear function) thickness t3 and be thickened composition filter glass keep ring portion 68 thickness t2 sum, So suffering from the drawback that, i.e. as an entirety, the thickness on the optical axis direction of optical filtering picture frame main body 51 Degree t becomes big, and this becomes the main cause easily producing vignetting in optical filtering picture frame.

It addition, in filter glass maintaining body in existing optical filtering picture frame, use manufacturing whole riveting Riveting tongue 70 time, by formed circular cutting slot 71 formed.Therefore, by along optical axis The C direction ring-type cutting slot of depth cutting circle 71 forms riveting tongue 70, and, to circular cutting Groove 71 inserts riveting mould 74 to carry out pressurizing and deformation processing, so needing this circular cutting slot The internal diameter size φ 2 of 71 is set to greatly.Further, circular cutting slot 71 needs have big internal diameter φ 2, This circular cutting slot 71 needs to be formed as having big width W, therefore, is arranged at described filter lens Sheet keeps the interior radial direction optical axis C direction of the filter glass leading edge frame 69 of the edge, top of ring portion 68 to reduce, Thus produce following shortcoming: i.e., in filter lens bore φ determined optical filtering picture frame main body 51, it has Effect diameter phi 3 is substantially reduced, and becomes the main cause that vignetting produces.

Additionally, in filter glass maintaining body in the existing optical filtering picture frame shown in Fig. 5 A, Fig. 5 B, Utilize riveting mould 74 to make the top ends of riveting tongue 70 bend 90 degree and carry out riveting processing, bending Angle is big.It addition, in described conventional example, the part bent due to riveting is also directly and filter glass The Later Zhou Dynasty, one of the Five Dynasties edge of 52 contacts with corner 77, and corner 77 adds and becomes fulcrum carrying out riveting man-hour, therefore, Act on described filter glass 52 it can be made to deform for riveting the pressurizing and deformation power of processing, this physical deformation Reduce the holding precision of filter glass 52 and/or make filter glass facial disfigurement, therefore keeping for filter glass Mechanism brings harmful effect.

In order to eliminate disadvantages mentioned above, Japanese documentation 2013-146359 is (hereinafter referred to as " patent Document 3 ") invention relate to a kind of filter glass maintaining body, there is following problem:

1) the optical filtering picture frame of a kind of digital camera is provided, the size on the optical axis direction of optical filtering picture frame, The thickness of picture frame of i.e. filtering is formed thin, and provides a kind of optical filtering picture frame, though be arranged on telescope or Also it is not easy on wide-angle lens to produce vignetting.

2) a kind of filter glass maintaining body is provided, in the determined filter lens of filter lens bore, in making The effective diameter putting the filter glass in optical filtering picture frame maximizes, and provides a kind of optical filtering picture frame, i.e. Make to be arranged on and on the front side of telescope or wide-angle lens, also not easily lead to vignetting.

3) one riveting processing method is provided, it is possible in the built-in feelings being held in optical filtering picture frame of filter glass When being fixed under condition, in the state of the deformation that this filter glass will not produce physical deformation or heating causes Lower various filter glasss are maintained in optical filtering picture frame.

The invention of patent documentation 3 and the present invention have identical inventor, identical applicant, at Fig. 4 With in Fig. 6 A, Fig. 6 B, the invention of patent documentation 3 is described.Fig. 4 is optical filtering picture frame main body and camera lens mirror The explanatory diagram of the installation site of cylinder, Fig. 6 A, Fig. 6 B are the A-A enlarged partial cross section of Fig. 4, use Maintaining body after the manufacturing process and processing of explanation filter glass maintaining body.

In Fig. 4 and Fig. 6 A, Fig. 6 B, 51 represent optical filtering picture frame main body, and 52 represent filter glass, 53 represent digital camera main body, and 54 represent lens barrel, centered by described optical filtering picture frame main body 51, 55 represent incident illumination side, and 56 represent lens barrel side, and C represents optical filtering picture frame main body and the light of lens barrel Axle, φ represents filter lens bore.

And, use lens to protect about the filter glass 52 being built in described optical filtering picture frame main body 51 With filter glass, circularly polarized light filter glass, light quantity minimizing filter glass, bring the light of special-effect Stricture of vagina effect filter glass or the soft-focus filter glass that can mildly manifest object etc. are various Filter glass.

For illustrating in Fig. 6 A of patent documentation 3, Fig. 6 B, 51 represent optical filtering picture frame main body, pass through The metal endless loop being made up of aluminum or pyrite is carried out machining manufacture.It addition, 52 represent filter Light eyeglass, t represents the thickness of optical filtering picture frame main body 51, and 55 represent the incident illumination side of optical filtering picture frame main body, The 56 lens barrel sides representing optical filtering picture frame main body, optical filtering picture frame main body 51 is integrally formed, and will Optical filtering picture frame main body 51 is approximately separated into two parts, using the part of incident illumination side 55 as placket frame 57, Using the part of lens barrel side 56 as rear cylinder frame 58.

Inside diameter 59 at the placket frame 57 of optical filtering picture frame main body 51 is provided with for installing shade etc. attached The internal thread part 60 of part, the threaded base portion at this internal thread part 60 is provided with escape 61.And, move back The structure of cutter groove 61 is, makes the external screw thread of screwed togather adnexa in the way of having gap and internal thread part 60 are screwed, and abut with the stop surface 62 being arranged at threaded base portion, it is possible to so that described adnexa External screw thread will not screw togather and mode that the internal thread part 60 of relative placket frame 57 can freely load and unload is entered by tension Row screws togather operation.

It follows that the peripheral part 63 at the rear cylinder frame 58 of optical filtering picture frame main body 51 arranges oriented lens barrel External thread part 64 during installation, the threaded base portion at this external thread part 64 is provided with escape 65.And And, the structure of this escape 65 is, make external thread part 64 with the female thread of the lens barrel screwed togather with The mode with gap is screwed, and abuts with the stop surface 66 being arranged at threaded base portion, it is possible to The external thread part 64 making optical filtering picture frame main body 51 will not screw togather and the top of the most described lens barrel by tension The mode that portion can freely load and unload carries out screwing togather operation.

It addition, the central part private side 67 at described placket frame 57 with rear cylinder frame 58 arranges oriented optical axis C The ring-type filter glass holding ring portion 68 that side is prominent, keeps the top edge of ring portion 68 at this filter glass Portion is provided with the filter glass leading edge frame 69 of filter glass 52, at the rear portion of this filter glass leading edge frame 69 It is provided with rear portion and is fitted together to frame 69a.

In the rear portion of described filter glass leading edge frame 69 frame 69a chimeric with rear portion, as shown in Figure 6A, Form riveting tongue 70 by the ring-type cutting slot of cutting circle 71 and bending deformation circumferential groove 78, pass through shape Become the circular cutting slot 71 towards lens barrel side opening and the circumferential rim towards described filter glass 52 The bending deformation circumferential groove 78 of direction, portion opening, riveting tongue 70 is formed from filter glass leading edge frame 69 Rear be L-shaped along filter glass 52 optical axis C direction extend ring bodies.

It addition, after the filter glass 52 kept embedded by the rear portion of described filter glass leading edge frame 57 End is provided with and at least tilts the chamfering bearing surface 80 of about 45 degree relative to the optical axis C of filter glass 52, This chamfering bearing surface 80 is for the top ends internal side diameter with the riveting tongue 70 being arranged at described L-shaped shape Set riveting abutting part 79 abuts against, and is processed by riveting, the riveting abutting part of riveting tongue 70 79 abut with the chamfering bearing surface 80 of this filter glass, thus filter glass 52 is clamped in described optical filtering Between the riveting abutting part 79 of eyeglass leading edge frame 69 and riveting tongue 70.

Additionally, tapering 75 and caulking part 76 by ring-type riveting mould 74 are to described riveting tongue 70 carry out pressurization makes it deform, and as shown in Figure 6B, carries out making the riveting abutting part 79 of riveting tongue 70 Top ends abut with the chamfering bearing surface 80 of filter glass physics riveting processing.

Therefore, the invention at patent documentation 3 provides the filter glass in a kind of following optical filtering picture frame to keep Mechanism, i.e. the optical filtering picture frame main body 51 installed in lens barrel top ends is by circular optical filtering picture frame Main body be divided into substantially two parts and formed, using the part of incident illumination side 55 as placket frame 57, by mirror The part of head lens barrel side 56 is as rear cylinder frame 58.Described placket frame 57 is formed for from incident illumination side 55 The internal thread part 60 of adnexa, the most in the rear cylinder frame 58 are installed to the inside diameter 59 of placket frame 57 Peripheral part 63 on be formed for being screwed into the external thread part 64 being installed on lens barrel, by this interior spiral shell The central part private side 67 of the optical filtering picture frame main body 51 that stricture of vagina portion 60 and external thread part 64 are formed arranges oriented The filter glass holding ring portion 68 that optical axis C side is prominent, this filter glass keeps the top ends of ring portion 68 to set Being equipped with ring-type filter glass leading edge frame 69, it is embedding that the rear portion of this filter glass leading edge frame 69 is fitted together to frame 69a Enter to keep filter glass 52, carry on the back at the rear being fitted together to the filter glass 52 that frame 69a embeds holding by rear portion The riveting tongue 70 carrying out clamping in the face of this filter glass 52 is formed as from described filter glass leading edge frame 69 The rear ring bodies that to be L-shaped shape extend along the optical axis C direction of filter glass 52, at this L The top ends internal side diameter of the riveting tongue 70 of word shape is provided with for the rear end with described filter glass 52 Portion offsets and fetches the riveting abutting part 79 clamping described filter glass 52, curved at this riveting abutting part 79 Sell off shape position and be provided with the bending deformation of the circumferential edge portions direction opening towards described filter glass 52 With circumferential groove 78, so that the inside diameter of riveting tongue 70 not circumferential edge portions with filter glass 52 connects Touch, when described riveting tongue 70 pressurizing and deformation, riveting tongue 70 variant part not with filter glass 52 Circumferential edge portions and filter glass minute surface contact.

It addition, the invention of patent documentation 3 provides the filter glass in a kind of following optical filtering picture frame to keep machine Structure, i.e. set in the rearward end being embedded the filter glass 52 kept by the rear portion of filter glass leading edge frame 69 Being equipped with chamfering bearing surface 80, chamfering bearing surface 80 is for the top ends with the riveting tongue 70 of L-shaped shape The riveting abutting part 79 set by internal side diameter abut against, at least relative to the optical axis C of filter glass 52 Tilt 45 degree.Processed by riveting, make riveting abutting part 79 and this filter glass of described riveting tongue The chamfering bearing surface 80 of 52 abuts, and filter glass 52 is clamped in described filter glass leading edge frame 69 And between the riveting abutting part 79 of riveting tongue 70.

But, the invention of patent documentation 3, as shown in Figure 6B, before filter glass 52 is by filter glass When riveting tongue 70 set by edge 69 and rear grips, the chamfering bearing surface of filter glass 52 80 and riveting tongue 70 riveting abutting part 79 abut against, and, riveting abutting part 79 only with optical filtering The chamfering bearing surface 80 of eyeglass 52 offsets and fetches clamping filter glass 52, is used for gripping filter glass The engaging bearing surface width of the riveting abutting part 79 of 52 is little, it addition, chamfering bearing surface 80 is relative to optical filtering The optical axis C of eyeglass 52 tilts about 45 degree, carries out the bearing surface of riveting abutting part 79 from tilted direction Riveting processing makes the bearing surface of riveting abutting part 79 abut against with chamfering bearing surface 80, therefore there is filter The stationary state of light eyeglass 52 the most all can not firmly and the shortcoming that is securely fixed.

It addition, the chamfering bearing surface 80 of filter glass 52 is formed as tilting 45 degree of left sides relative to optical axis C Right peripheral circles shape, so after filter glass 52 embedding is maintained at filter glass leading edge frame 69 After portion is fitted together in frame 69a, by riveting processing make riveting abutting part 79 equably with described filter lens The chamfering bearing surface 80 of sheet 52 abuts against, then be difficult to reach requirement in terms of machining accuracy, therefore actual On, chamfering bearing surface 80 cannot be riveted abutting part 79 and be completely covered, and abuts from unlapped chamfering The reflection light of face 80 part produces harmful effect to the performance of filter glass 52, for paying attention to uniformity For production, it is a bigger shortcoming in terms of quality.

Additionally, for the invention of patent documentation 3, in general, when manufacturing filter glass 52, The circumferential edge portions of the filter glass being cut into circular plate shape is formed relative to optical axis C inclination 45 degree The chamfer machining of left and right eliminates sharp keen otch, manufactures safety and the easy to handle without corner angle crackle is filtered Light eyeglass 52, this chamfer machining part is as the chamfering bearing surface 80 of filter glass 52, filter glass 52 After 80s at chamfering bearing surface, the overlay film of preventing light reflection will be covered on the two sides of filter glass 52 81a、81b。

Therefore, in filter glass 52, on the two sides of filter glass 52 after chamfering bearing surface 80 is processed During overlay film processing preventing light reflection overlay film 81a, 81b, the chamfer machining face avoiding tilting is needed to carry out overlay film processing Preventing light reflection overlay film 81a, 81b, from chamfering bearing surface 80, i.e. the edge of chamfering bearing surface 80 is to against sunshine The circumferential edge portions of reflection overlay film 81a, 81b produces the gap of 0.5～about 1.0mm.So, from falling The marginal portion of angle bearing surface 80, to the gap of the circumference edge portion of preventing light reflection overlay film 81a, becomes not Carry out the part of preventing light reflection overlay film processing, therefore there is the gap of reflection light never preventing light reflection overlay film Incident and the performance of filter glass 52 is produced dysgenic problem.

Patent documentation 1: Japanese Patent Laid-Open 2010-113016 publication；

Patent documentation 2: Japanese Patent Laid-Open 2008-191412 publication；

Patent documentation 3: Japanese documentation Patent 2013-146359.

Summary of the invention

Thus, problem to be solved by this invention is to provide the filter glass frame of a kind of digital camera, The size of the optical axis direction of this optical filtering picture frame, the thickness of the picture frame that i.e. filters is formed thin, this filter glass frame Also it is not easy to produce vignetting even if being arranged on telescope or wide-angle lens.

It addition, the present invention provides a kind of filter glass maintaining body, in the determined optical filtering of filter lens bore In mirror, it is possible to make the effective diameter being built in the filter glass in optical filtering picture frame maximize, and can carry For a kind of optical filtering picture frame, also not easily lead to vignetting even if being arranged on the front side of telescope or wide-angle lens.

Additionally, the present invention provides a kind of riveting processing method, it is possible to carrying out built-in guarantor in optical filtering picture frame When being fixed in the case of holding filter glass, so that filter glass will not occur physical deformation or by adding Various filter glasss are maintained in optical filtering picture frame by the state of the deformation that thermal conductance causes.

And, the present invention provides the firm filter glass that the performance of a kind of impact resistance and vibration resistance is good to keep Mechanism, it is possible to eliminate the shortcoming in following existing structure, i.e. the optical filtering in existing optical filtering picture frame Lens retaining struture abuts with chamfering by using the riveting abutting part of riveting tongue at the rear of filter glass Face abutting clamps filter glass thus is fixed.

It addition, the present invention eliminates following shortcoming.Shortcoming one: the filter glass in existing optical filtering picture frame is protected Hold mechanism, owing to using the riveting abutting part using riveting tongue at the rear of filter glass to abut with chamfering Face offsets and fetches the structure of clamping filter glass, it is impossible to utilizes riveting bearing surface that described chamfering is completely covered and supports Junction, the reflection light from the chamfering bearing surface failing to be capped produces bad shadow to the performance of filter glass Ring.Shortcoming two: in filter glass, rear at chamfering bearing surface covers to the two of filter glass faces When film processing is for preventing the antireflection overlay film reflecting light, it is necessary to overlay film is carried out in the chamfer machining face avoiding tilting Processing antireflection overlay film, from the edge of chamfering bearing surface to the circumference edge of antireflection overlay film, produces The gap of 0.5～about 1.0mm, from the edge of this chamfering bearing surface to the circumference edge of antireflection overlay film Till gap, become not carrying out the part of antireflection overlay film processing for preventing from reflecting light, reflect light The never gap of antireflection overlay film is incident and the performance of filter glass is produced harmful effect.

The present invention relates to a kind of filter glass maintaining body filtered in picture frame, be arranged on the top of lens barrel The optical filtering picture frame main body of end is circular optical filtering picture frame main body to be roughly divided into two parts and is formed, Using the part of incident illumination side as placket frame, using the part of lens barrel side as rear cylinder frame, before described Being provided with internal thread part on cylinder frame, this internal thread part is for from the inside diameter of the lateral described placket frame of incident illumination Installing adnexa, the peripheral part of cylinder frame is provided with the outer spiral shell for screwing in installation on lens barrel in the rear Stricture of vagina portion, the central part private side in the optical filtering picture frame main body being made up of this internal thread part and external thread part is arranged The filter glass holding ring portion that oriented optical axis side is prominent, keeps the top ends of ring portion to arrange at this filter glass There is ring-type filter glass leading edge frame, embed at the rear of this filter glass leading edge frame and maintain filter glass, For being embedded the back side at rear of the filter glass kept by this filter glass leading edge frame to this filter glass Carry out the riveting tongue clamped, from supporting edge peripheral part, form circular cylindric ring bodies, this Hold the rear of the edge peripheral part leading edge frame from described filter glass to extend along optical axis C direction, by The root internal side diameter of the circular cylindric ring bodies forming this riveting tongue is formed with bending deformation circle All grooves, are provided with bending deformation inner corner portion, described riveting in the bottom rear portion of this bending deformation circumferential groove Connect a length of of tongue, by carrying out riveting processing, described riveting with this bending deformation inner corner portion for starting point The chamfered section that the cylindric ring bodies of tongue starts to cover described filter glass from bending deformation inner corner portion abuts Face, and the part the machined surface edge to antireflection overlay film on the back side of filter glass is covered Length, described antireflection overlay film is processed to form the back side in filter glass by carrying out overlay film.

It addition, the present invention provides a kind of filter glass maintaining body filtered in picture frame, by so that filtering The effective aperture of eyeglass leading edge frame and filter glass effective being riveted tongue clamping at filter glass rear The length forming the cylindric ring bodies riveting tongue is set by the mode that bore is identical, thus aligns Filter lens leading edge frame and the edge part riveting tongue, it is possible to this edge is processed beautiful.

Additionally, the present invention provides a kind of filter glass maintaining body filtered in picture frame, in bending deformation The internal side diameter in corner is provided with the V shape grooving for assisting bending riveting tongue, in described bending deformation Corner is arranged on the root of the circular cylindrical shape ring bodies forming described riveting tongue.

Additionally, the present invention provides a kind of filter glass maintaining body filtered in picture frame, forming described riveting Connect the top ends of the circular cylindrical shape ring bodies of tongue, at the angle with the chamfering bearing surface of filter glass Corresponding position, portion is provided with the grooving of the V shape for assisting bending front end.

And, the present invention provides a kind of filter glass maintaining body filtered in picture frame, by above-mentioned curved The internal side diameter selling off shape inner corner portion is provided for the V-shaped grooving of auxiliary bending riveting tongue, and in riveting The position corresponding with the chamfering bearing surface corner of filter glass meeting portion is provided for auxiliary bending front end V-shaped grooving, the riveting machined surface of this riveting tongue can be maintained at carry out riveting add do not occur man-hour because of Rupture or because rupturing and the beautiful plating finished surface of variable color.

Thus, the present invention can provide the filter glass frame of a kind of digital camera, this optical filtering picture frame The size of optical axis direction, the thickness of the picture frame that i.e. filters can be formed thin, even if this filter glass frame is arranged on Also it is not easy on telescope or wide-angle lens to produce vignetting.

It addition, the filter glass maintaining body of the present invention, in the determined filter lens of filter lens bore, The effective diameter being built in the filter glass in optical filtering picture frame can be made to maximize, and can provide a kind of Optical filtering picture frame, also not easily leads to vignetting even if being arranged on the front side of telescope or wide-angle lens.

Additionally, this present invention provides a kind of riveting processing method, it is possible to carry out in optical filtering picture frame built-in When being fixed in the case of maintaining filter glass so that filter glass will not occur physical deformation or by Various filter glasss are maintained in optical filtering picture frame by the state of the deformation that heating causes.And a kind of filter is provided Light lens retaining struture, improve the holding precision of filter glass 2 and also filter lens unilateral on will not produce change Shape.

And, in the present invention, it is possible to the optical filtering picture frame being arranged on lens barrel top ends is made to thin, Therefore, it is possible to alleviate the weight of filter lens such that it is able to provide a kind of auto-focusing motor that can alleviate The filter lens of burden.

It addition, the present invention provides the filter glass maintaining body eliminating following shortcoming.Shortcoming one: existing Filter glass maintaining body in optical filtering picture frame, uses riveting tongue owing to using at the rear of filter glass Riveting abutting part and chamfering bearing surface offset and fetch the structure of clamping filter glass, it is impossible to utilize riveting to support Junction is completely covered described chamfering bearing surface, from the reflection light of chamfering bearing surface failing to be capped to filter The performance of light eyeglass produces harmful effect.Shortcoming two: in filter glass, at chamfering bearing surface The two sides overlay film processing of backward filter glass for preventing the antireflection overlay film reflecting light time, it is necessary to avoid Overlay film processing antireflection overlay film is carried out in the chamfer machining face tilted, and covers to antireflection from the edge of chamfering bearing surface Till the circumference edge of film, create the gap of 0.5～about 1.0mm, from the edge of this chamfering bearing surface Gap to the circumference edge of antireflection overlay film, becomes the antireflection not carried out for preventing from reflecting light The part of overlay film processing, the gap of reflection light never antireflection overlay film is incident and performance to filter glass Produce harmful effect.

Additionally, the present invention provides the firm filter glass that the performance of a kind of impact resistance and vibration resistance is good to keep Mechanism, it is possible in the way of the parts of filter lens main body and filter glass are combined, number of components is reduced To considerably less such that it is able to reduce cost and improve efficiency of assembling, the filter lens being processed to form by riveting Sheet maintaining body so that the effective aperture of filter glass leading edge frame be riveted tongue at filter glass rear Mode that the effective aperture of filter glass of clamping is identical sets the cylindric ring bodies forming riveting tongue Length, can be formed attractive in appearance by the face shaping in the maintaining body portion of filter lens.

Additionally, the present invention provides a kind of filter glass maintaining body filtered in picture frame, at filter glass In riveting processing department, riveting tongue is provided with the V-shaped grooving of auxiliary bending, at riveting tongue Corresponding position, the corner of the chamfering bearing surface with filter glass be provided with the V of front end bending auxiliary The grooving of font, thus, riveting machined surface is able to maintain that riveting adds and will not rupture and not have because rupturing man-hour And cause the beautiful plating finished surface of variable color

Accompanying drawing explanation

Fig. 1 is that the vertical profile of the major part of the optical filtering picture frame main body for embodiments of the invention 1 are described regards Figure.

Fig. 2 A is the amplification view of the A-A part of Fig. 1.

Fig. 2 B is the explanatory diagram that riveting machines state shown in the amplification view of Fig. 2 A.

Fig. 3 A is the partial enlargement longitudinal section for embodiments of the invention 2 are described.

Fig. 3 B is the explanatory diagram that riveting machines state shown in the amplification view of Fig. 3 A.

Fig. 4 is the optical filtering picture frame main body installation site with lens barrel of the conventional example for the present invention is described Explanatory diagram.

Fig. 5 A is the explanatory diagram of the conventional example of the present invention, is also the enlarged section of the A-A part of Fig. 4 Figure.

Fig. 5 B is conventional example explanatory diagram, is also to illustrate the explanatory diagram that the riveting of Fig. 5 A machines state.

Fig. 6 A is the explanatory diagram of other conventional examples of the present invention, is also the amplification of the A-A part of Fig. 4 Sectional view.

Fig. 6 B is the explanatory diagram of conventional example, is also to illustrate the explanatory diagram that the riveting of Fig. 6 A machines state.

The explanation of reference

1: optical filtering picture frame main body；

2: filter glass；

3: incident illumination；

4: lens barrel side；

5: placket frame；

6: rear cylinder frame；

7: inside diameter；

8: internal thread part；

9: escape；

10: stop surface；

11: peripheral part；

12: external thread part；

13: escape；

14: stop surface；

15: central part private side；

16: filter glass keeps ring portion；

17: filter glass leading edge frame；

17a: chimeric frame；

18: riveting tongue；

19: circular cutting slot；

20: bending deformation circumferential groove；

21: support edge peripheral part；

22: cylindric ring bodies；

23: bending deformation inner corner portion；

24: chamfered section bearing surface；

25: antireflection overlay film；

26: machined surface edge；

27: riveting abutting part；

28: nose circle circumference；

29: riveting mould；

30: forming part；

31: riveting processing department；

32: bending auxiliary V-shaped grooving；

33: front end bending auxiliary V-shaped grooving；

C: optical axis；

T: the thickness of optical filtering picture frame main body；

T1: the thickness of placket frame；

T2: filter glass keeps the thickness of ring portion；

T3: the thickness of rear cylinder frame；

φ 1: filter lens bore；

φ 2: the internal diameter of circular cutting slot；

The effective diameter of φ 3: filter glass；

The overlay film processing diameter of φ 4: antireflection overlay film；

W: the width of circular cutting slot.

Detailed description of the invention

In the fixing means of the filter glass realized above by riveting processing, have the disadvantage in that and set After the ring-type edge of the inside diameter being placed in the incident illumination side of optical filtering picture frame main body is subject to be arranged on filter glass The shape of the riveting tongue in portion is processed, is carried out riveting outside dimension or the riveting of the riveting mould adding man-hour With the restriction of the outside dimension of heating tool, the effective diameter therefore limited by the ring-type edge of filter glass Reduce and generally diminish, even if thus specially optical filtering picture frame body making being obtained thin also due to filter glass Effective diameter reduce generation gradual halation phenomena.

Additionally, in filter glass maintaining body in existing optical filtering picture frame, utilizing riveting mould The top ends of bending riveting tongue carries out riveting and adds man-hour, the bending part formed by riveting directly with The circumference contact of filter glass, the corner in the circumference of this filter glass becomes fulcrum, adds in riveting In work, described filter glass effect is used for riveting the pressurizing and deformation power of processing and brings it about deformation, from And the deformation of this physics reduces the holding precision of filter glass, and/or make that filter lens is unilateral to deform, from And filter glass maintaining body is brought harmful effect.

Thus, the present invention relates to a kind of filter glass maintaining body filtered in picture frame, it is preferable that install Optical filtering picture frame main body in the top ends of lens barrel is that circular optical filtering picture frame main body is roughly divided into two Part and formed, using the part of incident illumination side as placket frame, using the part of lens barrel side as after Cylinder frame, is provided with internal thread part on described placket frame, and this internal thread part is for laterally described from incident illumination The inside diameter of placket frame installs adnexa, and the peripheral part of cylinder frame is provided with for lens barrel in the rear Screw in the external thread part installed, in the optical filtering picture frame main body being made up of this internal thread part and external thread part Centre portion private side arranges the prominent filter glass in oriented optical axis side and keeps ring portion, in this filter glass retaining ring The top ends in portion is provided with ring-type filter glass leading edge frame, embeds at the rear of this filter glass leading edge frame Maintain filter glass, for the rear at the filter glass being embedded holding by this filter glass leading edge frame The riveting tongue that this filter glass is clamped by the back side, forms circular circle from supporting edge peripheral part Cylindrical annular body, this support edge peripheral part from the rear of the leading edge frame of described filter glass along optical axis C Direction extends, by the root internal side diameter shape at the circular cylindric ring bodies forming this riveting tongue Become to have bending deformation circumferential groove, be provided with bending in the bottom rear portion of this bending deformation circumferential groove and become Shape inner corner portion, described riveting tongue a length of, by carrying out riveting with this bending deformation inner corner portion for starting point Connecing processing, the cylindric ring bodies of described riveting tongue starts to cover described optical filtering from bending deformation inner corner portion The chamfered section bearing surface of eyeglass, and by the machined surface edge to antireflection overlay film on the back side of filter glass The length that part till portion covers, described antireflection overlay film is processed to form in filter lens by carrying out overlay film The back side of sheet.

It addition, the invention still further relates to a kind of filter glass maintaining body filtered in picture frame, so that described filter The effective aperture of light eyeglass leading edge frame and the having of filter glass being riveted tongue clamping at filter glass rear The length forming the cylindric ring bodies riveting tongue is set by the mode that effect bore is equal.

Moreover, it relates to a kind of filter glass maintaining body filtered in picture frame, in bending deformation The internal side diameter of inner corner portion is provided with the V shape grooving for assisting bending riveting tongue, and described bending deforms Inner corner portion is arranged on the root of the circular cylindrical shape ring bodies forming described riveting tongue.

Moreover, it relates to a kind of filter glass maintaining body filtered in picture frame, described being formed The top ends of circular cylindrical shape ring bodies of riveting tongue, with the chamfering bearing surface of filter glass Corresponding position, corner is provided with the grooving of the V shape for assisting bending front end.

And, the present invention provides a kind of filter glass maintaining body filtered in picture frame, at filter glass In riveting processing department, riveting tongue is provided with the V-shaped grooving of auxiliary bending, at riveting tongue Corresponding position, the corner of the chamfering bearing surface with filter glass be provided with the V of front end bending auxiliary The grooving of font, thus, riveting machined surface is able to maintain that riveting adds and will not rupture and not have because rupturing man-hour And cause the beautiful plating finished surface of variable color.

Thus, it is provided that the optical filtering picture frame of a kind of digital camera, the chi on the optical axis direction of optical filtering picture frame Very little, the thickness of the picture frame that i.e. filters is formed thin, and provides a kind of optical filtering picture frame, looks in the distance even if being arranged on Also it is not easy on mirror or wide-angle lens to produce vignetting.

It addition, the present invention provides a kind of filter glass maintaining body, in the determined optical filtering of filter lens bore In mirror, make the effective diameter being built in the filter glass in optical filtering picture frame maximize, and a kind of filter is provided Light picture frame, also not easily leads to vignetting even if being arranged on the front side of telescope or wide-angle lens.

Additionally, the present invention provides a kind of riveting processing method, it is possible to be held in optical filtering filter glass is built-in When being fixed in the case of in picture frame, physical deformation will not be produced or heating causes at this filter glass Under the state of deformation, various filter glasss are maintained in optical filtering picture frame.And provide a kind of filter glass to protect Hold mechanism, improve the holding precision of filter glass and filter lens is unilateral will not be deformed.

It addition, the present invention provides the filter glass maintaining body eliminating following shortcoming.Shortcoming one: existing Optical filtering picture frame in filter glass maintaining body, due to use the rear of filter glass use riveting tongue The riveting abutting part in portion offsets with chamfering bearing surface and fetches the structure of clamping filter glass, it is impossible to utilize riveting Bearing surface is completely covered described chamfering bearing surface, from failing the reflection light pair of the chamfering bearing surface being capped The performance of filter glass produces harmful effect.Shortcoming two: in filter glass, at chamfering bearing surface The two sides overlay film processing of backward filter glass for preventing the antireflection overlay film reflecting light time, it is necessary to keep away Overlay film processing antireflection overlay film is carried out, from the edge of chamfering bearing surface to antireflection in the chamfer machining face opening inclination Till the circumference edge of overlay film, create the gap of 0.5～about 1.0mm, from the limit of this chamfering bearing surface Edge gap to the circumference edge of antireflection overlay film, becomes the counnter attack not carried out for preventing from reflecting light Penetrating the part of overlay film processing, the gap of reflection light never antireflection overlay film is incident and property to filter glass Harmful effect can be produced.

Additionally, the present invention provides a kind of filter glass maintaining body filtered in picture frame, at filter glass In riveting processing department, riveting tongue is provided with the V-shaped grooving of auxiliary bending, at riveting tongue Corresponding position, the corner of the chamfering bearing surface with filter glass be provided with the V of front end bending auxiliary The grooving of font, thus, riveting machined surface is able to maintain that riveting adds and will not rupture and not have because rupturing man-hour And cause the beautiful plating finished surface of variable color.

Embodiment 1

Fig. 1 is the sectional view of the major part of the optical filtering picture frame of the explanation embodiment of the present invention 1, this filter lens Frame is installed on the lens barrel front surface of digital camera and uses.Fig. 2 A is the A-A part of Fig. 1 Amplification view, Fig. 2 B is to show that in the sectional view of Fig. 2 A riveting machines the explanation of state Figure.

In FIG, 1 represents optical filtering picture frame main body, and 2 represent filter glass, with described optical filtering picture frame main body Centered by 1,3 represent incident illumination side, and 4 represent lens barrel side, and C represents the optical axis of optical filtering picture frame main body. It addition, in FIG, t represents optical filtering picture frame body thickness, and φ 1 represents that filter lens bore, φ 3 represent The effective diameter of filter glass.

It addition, the optical filtering that the filter glass 2 being built in described optical filtering picture frame main body 1 uses lens to protect Eyeglass, circularly polarized light filter glass, light quantity minimizing filter glass, there is the generating optical fringe effect of special-effect With filter glass, can the various filter glasss such as soft-focus filter glass of soft performance object.

Embodiment 1 can provide the maintaining body of the filter glass 2 in following optical filtering picture frame main body 1, I.e., it is possible to the size of the optical axis direction C of optical filtering picture frame main body 1 that will be installed on before lens barrel, The i.e. thickness t of optical filtering picture frame main body 1 is formed thin, it addition, in the determined optical filtering of filter lens bore φ 1 In mirror, it is possible to make the effective diameter φ 3 being built in the filter glass in optical filtering picture frame main body 1 maximize. Further, also it is not easy to produce vignetting even if embodiment 1 provides to be installed on before telescope or wide-angle lens Optical filtering picture frame main body 1.It addition, the present invention provides following riveting organisation of working, i.e. will filter Eyeglass 2 is built-in be held in optical filtering picture frame main body 1 in the case of when being fixed, it is possible to will not be made this Under the state that filter glass 2 occurs physical deformation, various filter glasss 2 are held in optical filtering picture frame main body 1 Interior riveting organisation of working.

In Fig. 2 A, Fig. 2 B, 1 is optical filtering picture frame main body, is by metal to aluminum or pyrite etc. Endless loop carries out machining and makes.It addition, 2 represent filter glass, t represents optical filtering picture frame main body The thickness of 1,3 represent the incident illumination side of optical filtering picture frame main body, and 4 represent the lens barrel of optical filtering picture frame main body Side, described optical filtering picture frame main body 1 is integrally formed, and optical filtering picture frame main body 1 is probably divided into two Point, using the part of incident illumination side 3 as placket frame 5, using the part of lens barrel side 4 as rear cylinder frame 6.

The inside diameter 7 of the placket frame 5 of optical filtering picture frame main body 1 is provided with for installing shade etc. attached The internal thread part 8 of part, the threaded base portion of this internal thread part 8 is provided with escape 9.And, escape 9 Structure be to make the external screw thread of screwed togather adnexa be screwed with internal thread part 8 in the way of having gap, And abut against with the stop surface 10 being arranged at threaded base portion, it is possible to so that the external screw thread of described adnexa not Can screw togather and mode that the internal thread part 8 of relative placket frame 5 can freely load and unload carries out screwing togather operation by tension.

Secondly, the peripheral part 11 at the rear cylinder frame 6 of optical filtering picture frame main body 1 arranges the installation of oriented lens barrel Time external thread part 12, the threaded base portion at this external thread part 12 is provided with escape 13.It addition, The structure of this escape 13 is, makes external thread part 12 with the female thread of the lens barrel screwed togather to have The mode in gap is screwed, and abuts against with the stop surface 14 being arranged at threaded base portion, it is possible to so that The external thread part 12 of optical filtering picture frame main body 1 will not screw togather and the top ends energy of the most described lens barrel by tension The mode freely loaded and unloaded carries out screwing togather operation.

It addition, the central part private side 15 of described placket frame 5 and rear cylinder frame 6 is in prominent to optical axis C side The ring-type filter glass of being provided with annularly keep ring portion 16, this filter glass keeps the top of ring portion 16 Edge is provided with the filter glass leading edge frame 17 of filter glass 2 and the chimeric frame 17a of filter glass 2.

It addition, in filter glass leading edge frame 17 and the rear portion of chimeric frame 17a, as shown in Figure 2 A, logical Cross and circular cutting slot 19 and bending deformation circumferential groove 20 formation riveting tongue 18 are set.It is being used for By the back side, rear of this filter glass leading edge frame 17 and the filter glass 2 of the chimeric outer holding of frame 17a to this Filter glass 2 carries out the riveting tongue 18 clamped, and forms ring-type cylinder from support edge peripheral part 21 Shape ring bodies 22, and support edge peripheral part 21 is at described filter glass leading edge frame 17 and chimeric frame 17a Rear portion extends along optical axis C direction, at the ring-type cylindric ring bodies 22 forming this riveting tongue 18 Root internal side diameter is provided with bending deformation circumferential groove 20, thus at this bending deformation end of circumferential groove 20 Rear, portion portion sets bending deformation inner corner portion 23.The length of riveting tongue 18 is formed as, and becomes with this bending Shape inner corner portion 23 carries out the cylindric ring bodies 22 of the described riveting tongue 18 of riveting processing from curved for starting point Sell off shape inner corner portion 23 and start to cover the chamfered section bearing surface 24 of described filter glass, and will be to optical filtering The length that part the machined surface edge 26 to antireflection overlay film 25 at the back side of eyeglass 2 covers. Wherein, described antireflection overlay film 25 is by overlay film processing and is formed on the back side of filter glass 2. It addition, the φ 4 in Fig. 2 A represents the overlay film processing diameter of antireflection overlay film.

It addition, in the inside diameter side of the riveting tongue 18 being formed with described ring-type cylindric ring bodies 22 It is provided with the riveting abutting part 27 that the rear portion with filter glass 2 abuts against, and at this riveting abutting part 27 And grip filter glass 2 between filter glass leading edge frame 17.Further, with described riveting abutting part The dorso-posterior of 27 filter glasss 2 in opposite directions is provided with and tilts 45 degree relative to the optical axis C of filter glass 2 The described chamfering bearing surface 24 of left and right, is processed by riveting, and the riveting abutting part 27 of riveting tongue 18 supports Connect the chamfering bearing surface 24 being covered in this filter glass, in the rear side of filter glass 2 to this riveting tongue The nose circle circumference 28 of 18 carries out riveting processing makes it by the machined surface edge 26 to filter glass 2 be Part only covers, and wherein, described machined surface edge 26 is to carry out overlay film at the back side of filter glass 2 to add Work and the machined surface edge of antireflection overlay film 25 that formed.

It addition, forming part 30 and riveting processing department 31 by ring-type riveting mould 29 are to described riveting Connect tongue 18 to carry out adding and make it deform, as shown in Figure 2 B, carry out the abutting part of riveting tongue 18 The top ends of 27 is connected to the physics riveting processing of the chamfering bearing surface 24 of filter glass.

Therefore, in embodiment 1, the optical filtering picture frame main body being installed on lens barrel top ends is by annulus The optical filtering picture frame main body 1 of shape is divided into substantially two parts, using the part of incident illumination side 3 as placket frame 5, Using the part of lens barrel side 4 as rear cylinder frame 6.Additionally, it is provided that the filter being made up of riveting tongue 18 Filter glass maintaining body in light picture frame, is provided with for from incident illumination side 3 on described placket frame 5 The internal thread part 8 of adnexa is installed to placket frame inside diameter 7, and, the peripheral part of cylinder frame 6 in the rear 11 are provided with the external thread part 12 for screwing togather with lens barrel, by this internal thread part 8 and external thread part The central part private side 15 of the 12 optical filtering picture frame main bodys 1 constituted is to be provided with in the way of optical axis C side is prominent Filter glass keeps ring portion 16, keeps the top ends of ring portion 16 to be provided with ring-type optical filtering at this filter glass Eyeglass leading edge frame 17, embeds at the rear of this filter glass leading edge frame 17 and keeps filter glass 2, be used for The back side, rear of filter glass 2 of holding is embedded to this filter glass 2 by this filter glass leading edge frame 17 Carry out the riveting tongue 18 clamped, from support edge peripheral part 21, form ring-type cylindric ring bodies 22, This support edge peripheral part 21 starts from the rear portion of described filter glass leading edge frame 17 to extend along optical axis C direction, Root internal side diameter at the ring-type cylindric ring bodies 22 forming this riveting tongue 18 is provided with bending deformation With circumferential groove 20, thus the bottom rear portion at this bending deformation circumferential groove 20 is provided with bending deformation Inner corner portion 23.Rivet a length of of tongue 18, rivet for starting point with this bending deformation inner corner portion 23 Processing, the cylindric ring bodies 22 of described riveting tongue 18 starts to cover institute from bending deformation inner corner portion 23 State the chamfered section bearing surface 24 of filter glass, and by the back side of filter glass 2 to antireflection overlay film 25 Machined surface edge 26 till part cover length.Wherein, described antireflection overlay film 25 is by Overlay film is processed to form at the back side of filter glass 2.

Thus, the filter glass maintaining body in the optical filtering picture frame of the embodiment 1 shown in Fig. 2 A, Fig. 2 B, Adding man-hour the top ends of riveting tongue 18 being carried out riveting by riveting mould 29, riveting is formed Bending part is not directly contacted with the parts such as the Later Zhou Dynasty, one of the Five Dynasties edge of filter glass 2, adds man-hour in riveting, not to filter Light eyeglass leading edge frame 17 applies the pressurizing and deformation power for riveting processing, owing to adding man-hour not to filter in riveting Light eyeglass leading edge frame 17 applies power, it is possible to by before filter glass exterior region 17 and formation filter glass The filter glass of edge 17 keeps the thickness t2 of ring portion 16 to be formed thin.

Therefore, the thickness t of optical filtering picture frame main body 1 is, by realizing the internal thread part 8 of basic function and moving back Cutter groove 9 constitute placket frame 5 thickness t1, by external thread part 12 and the escape realizing basic function The thickness t3 of the 13 rear cylinder frames 6 constituted, thinner filter glass can be made to than ever keep ring portion 16 Thickness t2 sum, as entirety, it is possible to the thickness t of the optical axis direction of optical filtering picture frame main body 1 is reduced To Min., using the teaching of the invention it is possible to provide be not easy to produce the filter glass of vignetting compared with existing optical filtering picture frame Maintaining body.

It addition, the filter glass maintaining body in existing optical filtering picture frame, at the riveting tongue manufacturing riveting During portion's entirety, arranging circular cutting slot, this circular cutting slot cuts deeply with shape in optical axis C direction Become riveting tongue, and, described circular cutting slot is used for inserting riveting mould and carries out pressurizing and deformation and add Work, when machining, it is necessary to by internal diameter φ 2 size and the circular cutting slot of this circular cutting slot Width W set ground form greatly this circular cutting slot.Shape with regard to the riveting tongue 18 in the present invention For shape, by being formed towards the circular cutting slot 19 of lens barrel side opening with towards described filter lens It is ring-type that bending deformation circumferential groove 20 formation of direction, the circumference edge opening of sheet 2 has ring-type cylindrical shape The riveting tongue 18 of body 22, described cylindrical shape ring bodies 22 is opened from the rear portion of filter glass leading edge frame 17 Begin to extend along the optical axis C direction of filter glass 2, thus the degree of depth of described circular cutting slot 19 can The most shallow, and can the width W of circular cutting slot 19 be formed little, therefore can increase and set The internal diameter of the filter glass exterior region 17 of the edge, top of ring portion 16 is kept, in filter in described filter glass In light aperture of mirror φ determined optical filtering picture frame main body 1, using the teaching of the invention it is possible to provide significantly increase the effective of filter glass Diameter phi 3 is not easy to produce the filter glass maintaining body of vignetting.

Additionally, in the filter glass maintaining body of the present invention shown in Fig. 2 A, Fig. 2 B, by riveting Carry out riveting by the top ends of mould 29 bending riveting tongue 18 and add man-hour, due to towards filter glass 2 The bending deformation circumferential groove 20 of direction, circumference edge opening form larger space, the bending that riveting produces Part is not directly contacted with the corner etc. of the Later Zhou Dynasty, one of the Five Dynasties edge of filter glass 2, and the most described filter glass 2 is not Exist and put on, for the pressurizing and deformation power riveting processing, the situation that filter glass 2 makes it deform, it is possible to carry For the holding precision of filter glass 2 being made to reduce and/or the filter glass holding of filter glass facial disfigurement Mechanism.

It addition, the present invention provides the filter glass maintaining body eliminating following shortcoming.Shortcoming one: existing Filter glass maintaining body, owing to using at the rear of filter glass by using the riveting of riveting tongue to support The portion that connects offsets with chamfering bearing surface and fetches the structure of clamping filter glass, it is impossible to utilize riveting bearing surface complete Cover described chamfering bearing surface, from the reflection light of the chamfering bearing surface failing to be capped to filter glass Performance produces harmful effect.Shortcoming two: in filter glass, in filter after chamfering bearing surface When the two sides overlay film of light eyeglass processes the antireflection overlay film of light, it is necessary to avoid having acclive chamfer machining face Carry out overlay film processing antireflection overlay film, start the circumference edge to antireflection overlay film from the edge of chamfering bearing surface Till, create the gap of 0.5～about 1.0mm, start to antireflection from the edge of this chamfering bearing surface Gap till the circumference edge of overlay film, becomes not carrying out the part of the antireflection overlay film processing of light, reflection The gap of light never antireflection overlay film is incident and the performance of filter glass is produced harmful effect.It addition, In the present embodiment, the back side, rear at filter glass 2 clamps the riveting tongue 18 of this filter glass 2 Forming ring-type cylindric ring bodies 22 from support edge peripheral part 21, this support edge peripheral part 21 is from institute The rear portion stating filter glass leading edge frame 17 starts to extend from along optical axis C direction, is forming this riveting tongue The root internal side diameter of the ring-type cylindric ring bodies 22 of 18 is provided with bending deformation circumferential groove 20, by This arranges bending deformation inner corner portion 23 in the bottom rear portion of this bending deformation circumferential groove 20.Riveting tongue The length in portion 18 is formed as, and carries out the described riveting of riveting processing with this bending deformation inner corner portion 23 for starting point The cylindric ring bodies 22 connecing tongue 18 starts to cover described filter glass from bending deformation inner corner portion 23 Chamfered section bearing surface 24, and by the machined surface edge to antireflection overlay film 25 at the back side of filter glass 2 The length that part till portion 26 covers.Wherein, antireflection overlay film 25 is by carrying out overlay film processing and shape Become at the back side of filter glass 2.

It addition, the present invention provides the firm filter glass that the performance of a kind of impact resistance and vibration resistance is good to keep Mechanism, it is possible in the way of the parts of filter lens main body and filter glass are combined, number of components is reduced To considerably less such that it is able to reduce cost and improve efficiency of assembling, the filter lens being processed to form by riveting Sheet maintaining body so that the effective aperture φ 3 of filter glass leading edge frame 17 with at filter glass rear by riveting The mode identical for effective aperture φ 3 of the filter glass connecing tongue 18 clamping sets formation riveting tongue 18 The length of cylindric ring bodies 22, can the face shaping in the maintaining body portion of filter lens be formed beautiful See, and for the shape of described riveting tongue 18, the ring-type riveting tongue in cylindric ring bodies Length i.e. big by the riveting exposure that contacts with filter glass 2 of riveting.

Embodiment 2

Embodiments of the invention 2 are illustrated by Fig. 3 A, Fig. 3 B, the accompanying drawing mark identical with described Fig. 2 Note represents same characteristic features key element.In Fig. 3 A, Fig. 3 B, 1 is optical filtering picture frame main body, is by aluminum Or the metal endless loop such as pyrite carries out incised notch processing and manufactures.It addition, 2 represent filter glass, t Representing the thickness of optical filtering picture frame main body 1,3 represent the incident illumination side of optical filtering picture frame main body, and 4 represent filter lens The lens barrel side of frame main body, described optical filtering picture frame main body 1 is integrally formed, and by optical filtering picture frame master Body 1 is probably divided into two parts, using the part of incident illumination side 3 as placket frame 5, by lens barrel side 4 Part as rear cylinder frame 6.

It is provided with for installing the adnexaes such as shade on the inside diameter 7 of the placket frame 5 of optical filtering picture frame main body 1 Internal thread part 8, the threaded base portion of this internal thread part 8 is provided with escape 9.And, escape 9 Structure be to make the external screw thread of screwed togather adnexa be screwed with internal thread part 8 in the way of having gap, And abut against with the stop surface 10 being arranged at threaded base portion, it is possible to so that the external screw thread of described adnexa not Can screw togather and mode that the internal thread part 8 of relative placket frame 5 can freely load and unload carries out screwing togather operation by tension.

Secondly, the peripheral part 11 at the rear cylinder frame 6 of optical filtering picture frame main body 1 arranges the installation of oriented lens barrel Time external thread part 12, the threaded base portion of this external thread part 12 is provided with escape 13.It addition, should The structure of escape 13 is, between making external thread part 12 and the female thread of lens barrel that screwed togather to have The mode of gap is screwed, and abuts against with the stop surface 14 being arranged at threaded base portion, it is possible to so that filtering The external thread part 12 of light picture frame main body 1 will not screw togather and the top ends of the most described lens barrel can be from by tension Carried out screwing togather operation by the mode loaded and unloaded.

It addition, the central part private side 15 of described placket frame 5 and rear cylinder frame 6 arranges oriented optical axis C side Prominent ring-type filter glass keeps ring portion 16, keeps the edge, top of ring portion 16 at this filter glass It is provided with the filter glass leading edge frame 17 of filter glass 2 and the chimeric frame 17a of filter glass 2.

It addition, as shown in Figure 3A, in filter glass leading edge frame 17 and the rear portion of chimeric frame 17a, logical Cross and circular cutting slot 19 and bending deformation circumferential groove 20 are set, be formed with riveting tongue 18, be used for By this filter glass leading edge frame 17 and the back side pair, rear of the filter glass 2 of the chimeric outer holding of frame 17a This filter glass 2 carries out the riveting tongue 18 clamped, from described filter glass leading edge frame 17 and chimeric The support edge peripheral part 21 that the rear portion of frame 17a extends along optical axis C direction forms ring-type cylindric ring Shape body 22, the root internal side diameter at the ring-type cylindric ring bodies 22 forming this riveting tongue 18 is provided with Bending deformation circumferential groove 20, thus sets curved in the bottom rear portion of this bending deformation circumferential groove 20 Sell off shape inner corner portion 23.The length of riveting tongue 18 is formed as, with this bending deformation inner corner portion 23 for rising Point carries out riveting processing, and the cylindric ring bodies 22 of described riveting tongue 18 is from bending deformation inner corner portion 23 Start to cover the chamfered section bearing surface 24 of described filter glass, and by anti-for arriving of the back side of filter glass 2 The length that part till the machined surface edge 26 of reflection overlay film 25 covers.Wherein, described antireflection covers Film 25 is to be formed on the back side of filter glass 2 by carrying out overlay film processing.

Thus, embodiment 2 needs to carry out following operation in the riveting processing of riveting tongue 18, i.e. Set bending deformation inner corner portion 23 in the bending deformation bottom rear portion of circumferential groove 20, become with this bending Shape inner corner portion 23 carries out riveting processing for starting point and deformation inner corner portion 23 is bent into acute angle.It addition, institute State after riveting tongue 18 covers the chamfering bearing surface 24 of filter glass 2, due to must be to filter glass Part till the machined surface edge 26 of the antireflection overlay film 25 that the rear side of 2 is machined from is covered Lid, in the rear side of filter glass 2, is processed again to the nose circle periphery riveting tongue 18 by riveting Portion 28(is as shown in Figure 2 B) carry out bending process.

But, optical filtering picture frame main body 1 carries out electroplating then chemistry at usual metallic material (aluminum) mostly Grind black alumina film and implement the polishing of roughening surface, above-mentioned bending deformation inner corner portion 23 and right Riveting processing department 32 after the chamfering bearing surface 24 of filter glass 2 covers can be at riveting processing table Rupturing and/or because rupturing the processing variable color portion caused, bringing harmful effect to product quality occur in face.

In embodiment 2, as a example by prevent, at riveting finished surface, the processing that ruptures and/or cause because of crackle occurs Variable color portion and the quality of product is had undesirable effect, as shown in Figure 3A, as riveting tongue 18 The bending deformation inner corner portion 23 of riveting machining starting point is formed and bends auxiliary V-shaped grooving 32, and Before corresponding position, the corner of the chamfering bearing surface 24 with filter glass on riveting tongue 18 is formed The grooving 33 of the V-shaped that end bending helps.

Therefore, the bending auxiliary of bending deformation inner corner portion 23 V-shaped grooving 30 part and front end bending Auxiliary V-shaped grooving 33 part, at riveting tongue 18 in the case of being bent by riveting processing The radian at angle that presented of surface diminish such that it is able to provide riveting to add rupturing and/or broken of producing man-hour Split the processing variable color portion the inconspicuous filter lens holding frame with face shaping attractive in appearance caused.

Thus, the size of the optical axis direction that the invention provides optical filtering picture frame i.e. filter picture frame thickness formed Obtain the optical filtering picture frame of thin digital camera, even if this optical filtering picture frame is installed on telescope or wide-angle lens, Also it is not easy to produce vignetting.

It addition, the filter glass maintaining body of the present invention, in the determined filter lens of filter lens bore, Provide the maximized filter glass of the effective diameter making to be built in the filter glass in optical filtering picture frame and keep machine Structure, it is possible to even if providing the front side being installed on telescope or wide-angle lens to be also not easy to produce the filter of vignetting Light picture frame.

Additionally, the present invention provides following riveting processing method, it is being held in optical filtering by built-in for filter glass When being fixed in the case of in picture frame, it is possible to physical deformation or heating will not be produced on this filter glass Under the state of the deformation caused, various filter glasss are maintained in optical filtering picture frame.Further, energy of the present invention Enough holding precision providing raising filter glass 2 and the unilateral filter glass that will not be deformed of filter lens are protected Hold mechanism.

It addition, in the present invention, owing to the optical filtering picture frame being installed on lens barrel top ends can be made to Thin, it is possible to provide the filter lens alleviating filter lens weight, alleviating auto-focusing motor burden.

It addition, the present invention provides the filter glass maintaining body eliminating following shortcoming.Shortcoming one: existing Filter glass maintaining body in optical filtering picture frame, uses riveting tongue owing to using at the rear of filter glass Riveting abutting part and chamfering bearing surface offset and fetch the structure of clamping filter glass, it is impossible to utilize riveting to support Junction is completely covered described chamfering bearing surface, from the reflection light of chamfering bearing surface failing to be capped to filter The performance of light eyeglass produces harmful effect.Shortcoming two: in filter glass, chamfering bearing surface it When two face overlay film processing of backward filter glass are for preventing the antireflection overlay film reflecting light, it is necessary to avoid Overlay film processing antireflection overlay film is carried out in the chamfer machining face tilted, and covers to antireflection from the edge of chamfering bearing surface Till the circumference edge of film, create the gap of 0.5～about 1.0mm, from the edge of this chamfering bearing surface Gap to the circumference edge of antireflection overlay film, becomes the antireflection not carried out for preventing from reflecting light The part of overlay film processing, the gap of reflection light never antireflection overlay film is incident and performance to filter glass Produce harmful effect.

It addition, the present invention provides the firm filter glass that the performance of a kind of impact resistance and vibration resistance is good to keep Mechanism, it is possible in the way of the parts of filter lens main body and filter glass are combined, number of components is reduced To considerably less such that it is able to reduce cost and improve efficiency of assembling, the filter lens being processed to form by riveting Sheet maintaining body so that the effective aperture of filter glass leading edge frame be riveted tongue at filter glass rear Mode that the effective aperture of filter glass of clamping is identical sets the cylindric ring bodies forming riveting tongue Length, can be formed attractive in appearance by the face shaping in the maintaining body portion of filter lens, and with regard to described riveting For the shape of tongue 18, in ring-type cylindric ring bodies riveting tongue length i.e. by riveting with The riveting exposure of filter glass 2 contact is big.

Claims

1. filter the filter glass maintaining body in picture frame,

It is arranged on the circular optical filtering picture frame main body of the top ends of lens barrel, by optical filtering picture frame main body Incident illumination side is as front, using lens barrel side as rear,

Circular optical filtering picture frame main body is roughly divided into two parts, before the incident illumination side of optical filtering picture frame main body Side part as placket frame, the part of the lens barrel rear flank side of optical filtering picture frame main body as rear cylinder frame,

Inside diameter at described placket frame is provided with the internal thread part installing adnexa,

The peripheral part of cylinder frame is provided with the external thread part for screwing in installation on lens barrel in the rear,

By the placket frame with internal thread part and there is the described optical filtering that the rear cylinder frame of external thread part is constituted The central part private side of picture frame main body arranges the filter lens that the optical axis direction of oriented filter lens frame main body highlights Sheet keeps ring portion,

The nose lip keeping ring portion at this filter glass is provided with ring-type filter glass leading edge frame,

Chimeric frame in the incident illumination rear flank side of this filter glass leading edge frame is embedded with filter glass,

This filter glass maintaining body is characterised by,

For the incident illumination side at the filter glass embedding this chimeric frame and kept by filter glass leading edge frame The riveting tongue that this filter glass is clamped by the back side at rear, in the rear side shape supporting edge peripheral part Becoming to have circular cylindric ring bodies, this support edge peripheral part is from the incidence of described filter glass leading edge frame Light side rear extends along the optical axis direction of optical filtering picture frame main body,

Front side at the root of the circular cylindric ring bodies forming this riveting tongue is formed curved Sell off shape circumferential groove,

It is provided with curved in the edge of the incident illumination rear flank side of the bottom of the bending deformation circumferential groove formed Sell off shape inner corner portion,

Adding and forming described riveting tongue man-hour by carrying out riveting with this bending deformation inner corner portion for starting point Cylindric ring bodies a length of, start to cover the chamfering of described filter glass from bending deformation inner corner portion Portion's bearing surface, and the processing of antireflection overlay film that will be processed to form by overlay film in the back side of filter glass The length that part till edge, face covers.

2. the filter glass maintaining body in optical filtering picture frame as claimed in claim 1, it is characterised in that

So that the effective aperture of described filter glass leading edge frame presss from both sides with being riveted tongue at filter glass rear The length of the equal mode of the effective aperture of the filter glass the held cylindric ring bodies to forming riveting tongue Degree is set.

3. the filter glass maintaining body in optical filtering picture frame as claimed in claim 1, it is characterised in that

Radially inner side in bending deformation inner corner portion is provided with the V shape for assisting bending riveting tongue Grooving, described bending deformation inner corner portion is arranged on that to form the circular cylindrical shape of described riveting tongue ring-type The root of body.

4. the filter glass maintaining body in optical filtering picture frame as claimed in claim 2, it is characterised in that

5. the filter glass maintaining body in the optical filtering picture frame as according to any one of Claims 1-4, It is characterized in that,

Forming the top ends of circular cylindrical shape ring bodies of described riveting tongue, with filter glass Corresponding position, the corner of chamfering bearing surface be provided with for assisting cutting of the V shape of bending front end Groove.