CN112051698B

CN112051698B - Insert element with adhesive ring, assembly, lens interface, camera and manufacturing method

Info

Publication number: CN112051698B
Application number: CN202010501147.4A
Authority: CN
Inventors: A·霍洛波夫
Original assignee: Basler AG
Current assignee: Basler AG
Priority date: 2019-06-06
Filing date: 2020-06-04
Publication date: 2022-04-08
Anticipated expiration: 2040-06-04
Also published as: CN112051698A; DE102019115381A1; DE102019115381B4

Abstract

The invention relates to an insert element (10, 10') for detachably inserting into a lens interface (20) of a camera, wherein the insert element comprises: a frame element (11, 11') in which a channel (D, D ') for the provided beam path (L) is formed and which has at least two detachment holes (14a, 14b,14a ', 14b '), and an adhesive ring (15, 15 ') fixed on the frame element (11, 11') for adhering the insert element in the lens mount, wherein the adhesive ring (15, 15 ') surrounds the channel (D). The invention also relates to an assembly comprising the aforementioned insert element and comprising a support disc as a removal tool as well as a camera having the aforementioned lens mount (20) and the aforementioned insert element, a method for manufacturing the aforementioned insert element.

Description

Insert element with adhesive ring, assembly, lens interface, camera and manufacturing method

Technical Field

The present invention relates to an insert element for detachable insertion into a lens mount of a camera and a method for manufacturing such an insert element. The invention also relates to an assembly with an insertion element and a removal tool, a camera lens mount arranged for receiving such an insertion element, and a camera with such a lens mount and such an insertion element.

Background

Cameras with interchangeable lens systems typically offer the following possibilities: one or more insertion elements are placed in the camera housing between the corresponding lens and the photosensitive recording medium (e.g. film or image sensor) in the set beam path, by means of which insertion elements the incident light can be influenced. Such an insert element may for example comprise a picture-frame (past-stop) for masking an area of the photosensitive recording medium and/or comprise a filter, such as in particular a polarization filter, a color filter or a blocking filter. Preferably, the insertion element can be sealingly inserted into the lens mount (of the front part) of the camera and can be removed again, for example, for cleaning or replacement.

For this purpose, the insert element can be clamped firmly in the lens mount or screwed to a surface in the lens mount in a conventional manner, for example by means of a groove, respectively.

In particular, DE 202009014837U 1 discloses a filter holder with a clamping element, by means of which the filter holder can be fixed in a lens mount. By screwing the screw into the holder, the filter holder can be released from the lens mount as needed. DE 102017109179B 3 discloses a holding device for an optical element of a camera, which can be fixed in a lens mount by means of screws.

A disadvantage of this possibility is that assembly and disassembly is laborious and that grinding dust is already generated during assembly, which dust can contaminate the recording medium in particular.

Disclosure of Invention

It is an object of the present invention to provide an improved technique which allows an insertion element to be detachably inserted into a lens interface of a camera.

This object is achieved by an insert element, a lens mount, a camera and a method for producing an insert element according to the invention. Advantageous embodiments are disclosed in the description and the drawings.

The insertion element according to the invention is provided or set up for detachable insertion into a lens mount of a camera, in particular a lens mount according to the invention as described below.

The insertion element comprises a frame element in which a channel for the desired beam path is formed, through which channel the incident light can thus pass. The frame element has at least two holes which are provided in particular for the purpose of effecting disassembly and are therefore referred to hereinafter as "disassembly holes". Furthermore, the insert element comprises an adhesive material which is fixed to the frame element and which serves to adhere the insert element in the lens mount (on the contact surface provided). The bonding material surrounds the channel in an annular manner and is therefore referred to hereinafter as a "bonding ring". In this context, a "ring" or "annular" means a geometric structure which surrounds the inner region along a plane or (abstract) plane and separates it from the outer region, where the outer edge and/or the inner edge may run at least in sections along a circular path, but this is not mandatory.

Therefore, the insert member according to the present invention can be bonded in the lens mount. This also enables the user to fix the insert element in a simple, abrasive-free and debris-free manner. Contamination of the photosensitive recording medium can thus be prevented or at least reduced, and inspection and cleaning efforts can be reduced. The insert element according to the invention is therefore particularly suitable for use in medical and/or microscopic applications.

Furthermore, since fastening means such as screws, clamping elements or O-rings can be dispensed with in the insert element according to the invention, the production of the insert element is simplified and a particularly space-saving design of the insert element is made possible. The latter enables, in particular, the use of the insertion element in cameras having relatively large photosensitive recording media (e.g. 1 "or 1.1" sensors) and at the same time having a compact recording space (e.g. a diameter of less than 24.5 mm) and/or using lenses with a large screw-in depth.

The removal opening, which preferably passes completely through the insertion element in the provided beam path direction, serves for: when the insert element is removed from the lens mount, a screwed-in screw (in particular a headless screw, for example M2, or a cap screw) is received in each case and guided through the frame element against the surface of the lens mount facing the insert element. In this way, if the corresponding screw is rotated further through the frame element, the insert element can be pushed away from the surface facing it, which is also referred to below as the "base surface" of the lens mount, and be detached from the adhesive bond gently but reliably.

Alternatively, the insertion element is detachable after being bonded by means of its support disk: accordingly, the assembly according to the invention comprises, in addition to the insert element according to the invention (according to one of the embodiments disclosed in this document), a support disc arranged for: supported at a fixed positive (i.e. >0) distance from the base surface on the surface of the lens interface, for example on the edge around the cylindrical receiving area for the lens (and preferably in a plane perpendicular to the set beam path). The support plate (which may, for example, be at least partially formed from a sheet material) has at least two openings, which are aligned with the removal openings when the support plate is in place.

The cap screw, which passes through the hole, can then be screwed into the removal hole, wherein the bearing disk serves as a bearing surface for the screw head. By further tightening, the insert element can be pulled towards the support disk.

The assembly may preferably comprise such a cap screw: the cap screw is provided for screwing into the removal opening of the insert element through the opening of the support plate in the inserted state of the insert element and when the support plate is placed on the surface of the lens mount as mentioned. In this case, the cap screws preferably each have a length which prevents the cap screws from contacting the base surface when the respective heads of the screws which are screwed in bear against the support plate. This prevents the occurrence of chips on the base surface when the cap screw is screwed into the removal hole.

In this case, such a cap screw is preferably loose in a corresponding bore of the support disk, so that the cap screw and the support disk are particularly preferably not screwed into one another, so that the cap screw can also be screwed further when its head is placed on the support disk. The holes may be configured without threads and/or the cap screws may be unthreaded in the head region (which is arranged in the corresponding hole when the head abuts against the support disk) and/or the radial diameter of such cap screws may be smaller than the diameter of the corresponding hole in the support disk.

The frame element may for example be at least partly made of plastic. In particular, it can be manufactured by means of injection molding.

The removal opening can be configured without a thread when the insertion element is inserted for the first time: the removal opening is preferably provided for the formation of an internal thread when the screw is first screwed in (for removal), i.e. the thread is tapped by the screw. Thereby, the formation of abrasive dust or debris upon disassembly can be further reduced.

The adhesive ring preferably has a ring width (i.e. the distance from the outer edge to the inner edge) along its annular trajectory around said channel, which ring width is in the range of at most 4mm, at most 3mm or at most 2.5mm and/or at least 0.6mm, at least mm or at least 1.2mm, respectively.

The adhesive ring is preferably configured substantially (in particular with a deviation in the range of +/-1.5mm or +/-1mm at most) axisymmetrically with respect to an axis connecting two detachment holes or two of a plurality of detachment holes to one another. A particularly uniform stripping can thereby be achieved.

The insertion element according to the invention preferably has an outer edge extending along the cylindrical circumference in a plane perpendicular to the provided beam path. This facilitates the positioning of the insertion element in a corresponding cylindrical receiving region of the lens mount, into which the insertion element can preferably be inserted with an exact fit.

According to an advantageous embodiment of the insertion element according to the invention, the adhesive ring has an outer edge facing away from the channel, which outer edge runs partially, preferably over at least 80% of its length, along the outer edge of the frame element, for example at a distance of at most 1mm, at most 0.8mm or at most 0.5 mm. The surface of the frame element is thereby particularly well utilized, which makes the construction of the insert element particularly space-saving, and the adhesive ring also prevents the formation of cavities on its outer edge, in which particles may accumulate. Here, the outer edge of the adhesive ring is preferably at least 0.1mm or even at least 0.15mm from the outer edge of the frame element along which it extends. This prevents the insertion element from accidentally adhering to the corresponding lens mount in the receiving region for the lens during insertion.

The lens interface according to the invention is a (separate, detachable or integrated) part of the camera, in particular the front part of the camera. The lens mount enables the housing of the camera to be inserted into the cylindrical region with the lens mount, for example by screwing the lens into the cylindrical region with a precise fit or by means of a bayonet connection. The lens mount is arranged for (adapted to) receive an insert element according to the invention according to one of the embodiments disclosed in this document. It has a surface (i.e. a base surface) facing the insert element to be inserted. The base surface can be a metal surface, in particular at least in regions.

A three-dimensional structure is formed on the base surface. The structure may for example comprise one or more protrusions facing in the direction of the insert element to be inserted (and thus the lens to be connected) and/or one or more recesses facing in the opposite direction. The structure is provided/set up for abutting against the adhesive ring of the insert element when the insert element according to the invention has been inserted, in order to firmly adhere the insert element to the three-dimensional structure. For simplicity, the attribute "three-dimensional" of this "structure" is sometimes omitted below.

Due to this construction, the bearing surface of the adhesive ring and thus the adhesive surface can be reduced, which ensures a residue-free peeling off when the insertion element is detached.

The structure is preferably configured along at least one curve. According to an advantageous embodiment, such a curve completely surrounds an opening arranged for allowing light to pass through to a photosensitive recording medium such as film or at least one image sensor; in particular, the structure is then preferably designed to surround the opening in an annular manner.

According to an advantageous embodiment, the structure comprises a plurality of depressions and/or pimples arranged along such a curve on the base surface. The plurality of dimples or pimples may have different shapes or all have the same shape. The distance between every two adjacent depressions or pimples is preferably at most twice and/or at least half the average diameter of the depressions or pimples, or as small as the smallest of the diameters which occur.

Alternatively or additionally, the three-dimensional structure may comprise at least one rib projecting towards the insert element to be inserted (and therefore towards the lens to be connected). The extension of such a rib, measured respectively perpendicularly to the curved trajectory, is referred to herein as the "width" of the rib in its corresponding point. Preferably, the width is at most 1.5mm or at most 1mm and/or at least 0.2mm or at least 0.4mm for all points of the rib.

In such an embodiment, the adhesion of the insertion element to the rib enables the rib and the adhesive ring to form an advantageous barrier for particles, by means of which the space (in the direction of the beam path) with the photosensitive recording medium behind the insertion element (for example the sensor chamber) is reliably sealed. Furthermore, the ribs reduce the bearing surface of the adhesive ring and thus the adhesive surface, which ensures a residue-free peeling off when the insertion element is detached.

The base surface of the lens mount according to the invention preferably comprises one or more surface regions which are provided for acting as stop surfaces for screws which are screwed in through corresponding removal holes when the inserted insert element is removed. At least one region of the three-dimensional structure for bearing against the adhesive ring is preferably arranged between one/each of such stop surfaces and an opening (for allowing light to pass onto the photosensitive recording medium) in the base surface: so that it is prevented that particles penetrate through the removal hole into the chamber with the photosensitive recording medium before screwing in the screw, and furthermore, the particles generated during screwing in are kept away from the chamber by the structure and the adhesive ring bonded thereto. In an advantageous embodiment, the stop surface or even the base surface is at least partially made of metal. This can further reduce the wear debris generated by the screw during removal.

The camera according to the invention comprises a lens mount according to the invention and an insertion element according to the invention (each according to one of the embodiments disclosed herein) insertable or insertable therein. Here, the adhesive ring of the insertion element and the structure of the lens mount are provided for abutting against each other when the insertion element is in the inserted state. The contact surface of the adhesive ring with the lens interface will then preferably be limited to this three-dimensional structure (e.g. ribs as described above).

According to an advantageous embodiment of the camera according to the invention, the contact surface of the adhesive ring and the frame element is configured to be larger than the contact surface of the adhesive ring and the lens mount on the base surface thereof, which is present in the inserted state. In this way, it can be ensured that the adhesive ring detaches without leaving a residue from the lens mount when the insert element is removed, rather than, for example, detaching from the insert element frame. The contact surface may be continuous or comprise a plurality of partial regions (the size of which adds up to the size of the corresponding contact surface).

In this case, the adhesion to possibly different materials (for example metal as the material of at least part of the three-dimensional structure on the lens mount base and plastic as the material of at least part of the frame element of the insert element) can also be compensated for by the different sizes of the contact surfaces: due to the significantly higher surface energy of the metal surface (for example, 30 to 50 times), the adhesion effect is significantly greater than on plastic, which can be compensated by a smaller contact surface (in a three-dimensional structure).

According to an advantageous embodiment of the invention, the frame element is configured as a picture frame in the form of a (preferably dimensionally stable) film or plate; such a picture frame may be advantageous, especially for monochrome cameras. The film or plate can be made, for example, of plastic and/or metal, preferably flat on one or both sides, and thus in particular not having a three-dimensional contour on one or both sides. Their channels and/or the at least two detachment holes may in particular be stamped. Such an insert element is particularly easy to manufacture.

Alternatively, the frame element of the insert element according to the invention can be configured as a filter holder, i.e. arranged (adapted) in such a way that the filter or the cover glass is held in the provided beam path. The frame element may have a step in the direction of the arranged beam path, which step is arranged for receiving an edge of a filter or a cover glass. In this way, the frame element can be designed as a holder for a filter or a protective glass.

An insert element with such a frame element can be used as a picture frame without a filter or a cover glass, for example in monochrome cameras. Alternatively, it may additionally comprise filters (for example polarizing filters, color filters or blocking filters, in particular infrared filters) and/or protective glass. The filter or the cover glass is preferably fitted into the step such that it abuts the step at the side (at its edge) preferably in a form-locking manner. In particular, the frame element in this way protects the respective environment of the filter/protective glass against damage by sharp edges of the filter/protective glass and thus at the same time prevents the generation of disadvantageous scratching particles when mounting and/or dismounting the insert element.

In a particularly advantageous embodiment variant, the filter/protective glass fits flush in the step and therefore has a thickness corresponding to the step height of the step. In this way the surface of the filter/protective glass lies in one plane with the surface of the surrounding frame element. The adhesive ring, which preferably extends over the two surfaces, does not have to compensate for the step and therefore adheres particularly firmly to these surfaces, so that there is no residue of the adhesive ring in the lens mount during disassembly.

The filter or the protective glass can be inserted loosely into the step and can be gripped in the region of the adhesive ring, so that it can be fixed in the frame element. In this way, a particularly low-stress fixing of the filter/protective glass can be achieved, which particularly well compensates or absorbs differences in the temperature-dependent expansion of the material.

Alternatively, the filter/cover glass may be firmly bonded in the step. In this way, the filter can be connected to the frame element in a gentle, tolerance-compensating and dust-tight manner and even in a watertight manner with a corresponding adhesive. The adhesive used for a strong bond is preferably elastic after its curing, so that temperature-dependent differences in material expansion can be absorbed again and a low-stress connection can be achieved.

According to an advantageous embodiment, the filter holder has a three-dimensional contour (for example a circumferential flange at the edge of the surface) on the surface facing away from or to face away from the lens interface base surface, which contour is convex in the direction of the provided beam path. A protective distance from the lens can be provided.

Preferably, the insert element according to the invention is a coherent or joined assembly, whereby its individual parts are connected to each other. This makes it easy for the user to mount and dismount (for example when changing or cleaning) and also simplifies the camera production, since the insert element as a whole can be manufactured in a separate process.

The removal hole of the insert element according to the invention (in addition to its function in effecting the peeling-off/removal of the bonded insert element) also enables a simplified accurate positioning of the insert element in the lens mount, in particular by means of special tools available in camera production.

In order to simplify the positioning, for example, even if no such special tool is available (for example, for the user), at least one projection can be formed on the surface of the frame element facing the lens interface base surface (in the direction following the provided beam path). Such a projection may be configured, for example, as a pin or a knob; in the embodiment in which the frame element is manufactured by injection molding, the projection may be injection molded. When such an insert element is inserted into a suitable lens mount, the base surface of the lens forms a frame (for example a recess, a hole or a guiding edge section) for the projection at the corresponding location, which projection serves as a positioning aid in that it can engage in a corresponding recess. The lens mount according to the invention therefore preferably has one, two or more recesses, holes and/or guiding edge sections in or on the base surface.

In such embodiments, the adhesive ring preferably surrounds the at least one protrusion; in some embodiment variants, the projection engages in the inserted state in a hole or a guiding edge section on the base surface, which is also sealed by a surrounding adhesive ring.

Preferably, at least one or at least two or all of the removal openings of the insertion element according to the invention are arranged outside (that is to say in the outer region) of the adhesive ring and are therefore not surrounded by the adhesive ring. The adhesive ring is thus arranged between said channel and such a removal hole in the surface of the frame element. In this way, the adhesive ring seals the chamber (e.g., sensor chamber) having the photosensitive recording medium from the corresponding detachment hole in a state of being adhered into the lens mount, preventing particles from entering the chamber through the detachment hole.

In the region of such a removal opening, the outer edge of the adhesive ring preferably has a corrugated shape. The outer edge may for example constitute a wave trough in which the corresponding removal hole is arranged. In particular, the outer edge of the adhesive ring may preferably extend along at least one third or even at least half of the outer circumference of the removal opening. Thereby minimizing the area of the base surface of the lens interface in areas that do not need to be sealed by means of the adhesive ring; furthermore, the ring width (which is advantageous for the bonding effect) of the bonding ring can be achieved while the design of the insertion element is space-saving.

The adhesive ring may comprise or consist entirely of a cured, previously tacky or pasty material. In particular, it may be configured as a strand of such a material, which strand may be applied, for example injected (i.e. metered) onto the frame element before curing.

According to an advantageous embodiment, the adhesive ring is formed at least partially by a double-sided adhesive film. This makes it possible to produce the insertion element with a precisely definable edge course of the adhesive ring particularly simply and cleanly. The membrane may for example be punched into the shape of the provided adhesive ring. The adhesive ring is preferably of one-piece (coherent) construction.

The adhesive ring is preferably at least partially elastic: in particular, it may comprise a foam material. The elasticity enables a low stress damping connection with the lens interface, and also compensates for temperature dependent differential expansion in the corresponding material.

According to a particular embodiment, the adhesive ring is configured as an annular foam adhesive film.

The advantageous elasticity of the adhesive ring in the direction of the provided beam path also enables the adhesive ring to be pressed into the three-dimensional structure on the base surface of the lens mount according to the invention, so that a particularly reliable connection can be established.

The method according to the invention is used for manufacturing an insert element for detachable insertion into a lens mount of a camera, in particular for manufacturing an insert element according to the invention according to one of the embodiments disclosed herein. The method includes applying an adhesive material to a surface of a substrate.

The substrate can be configured as a frame element with a channel for the provided beam path or as a continuous film which does not yet have a channel.

In the first case, the adhesive material is applied in such a way that it surrounds the channel in an annular manner (thus forming an adhesive ring) while leaving at least two detachment holes in the frame element. The adhesive material may be applied, in particular injected, onto the frame element, for example as a strand of a curable adhesive or pasty substance, before curing. Alternatively, the adhesive material (in the first case) can be configured as an adhesive ring made of a film which is bonded on both sides and is bonded to the frame element by its one adhesive surface.

The method according to the invention may comprise manufacturing such a frame element by means of injection moulding.

The frame element can be designed in particular as a stepped filter holder for receiving the edge of a filter and/or a protective glass. In this case, the method according to the invention may comprise inserting (if necessary firmly adhering) a filter or a cover glass in the step before applying the adhesive material.

In the second case described above (the substrate being configured as a continuous film), the channels can be punched in the substrate after the adhesive material has been applied (from a curable adhesive or pasty substance or configured as a double-sided adhesive film), so that the adhesive material surrounds the punched channels annularly (and thus becomes adhesive rings). The frame element can also preferably be made of a plate or a film by stamping the outer edge.

The adhesive material can be applied to the substrate as strands of material or in the form of a surface, which can be made into an annular shape in the latter case in particular by stamping; this makes it possible to manufacture the insertion element in the form of a picture frame particularly simply. The adhesive material can also be adhered to the substrate, for example as a continuous double-sided adhesive film, and then a channel for the provided beam path and at least two detachment holes are punched through the laminate produced in this way.

The stamping process may be multi-step, for example, the bonding material applied to the substrate may be stamped first, followed by stamping of the substrate itself.

The picture frame punched in this way can then preferably be glued to a sheet of siliconised material; this makes it possible to transport the punched adhesive part before use.

According to an advantageous embodiment of the invention, a removable protective film is arranged on the surface of the adhesive material facing away from the substrate, which protective film prevents premature adhesion of the insertion element. The protective film preferably has an outer contour which at least in some regions corresponds to the outer edge of the substrate, in particular of the frame element. In these areas, the protective film can be stamped together with the adhesive material in one process.

In such an embodiment, the protective film preferably has at least two holes, each of which is provided for being arranged in alignment with a respective corresponding detachment hole in the frame element; to be better distinguishable from other holes, these holes are referred to below as "primary pilot holes". They also simplify the correct positioning of the adhesive ring on the frame element.

In some embodiments, the base is configured as a frame element with one or more protrusions that serve as positioning aids when inserting the insert element into the lens mount, as described above, in which embodiments the protective film preferably has holes at corresponding locations; these holes are hereinafter referred to as "secondary locating holes". They provide an alignment aid to make it easier to apply the adhesive material to the frame element (as a base) and also prevent the protective film from not adhering completely to the adhesive material due to the protrusions. After the adhesive material has been applied to the frame element, the projections preferably project through the protective film or at least into the protective film.

The protective film may extend across the surface of the adhesive ring, in particular it may at least partially cover an inner region surrounded by the adhesive ring (around which the adhesive ring extends). If the frame element is designed as a filter holder with a filter or a protective glass, such a protective film protects the filter/protective glass before the insertion element is used.

Finally, the protective film may include a pull tab that facilitates its removal from the adhesive ring.

Drawings

Preferred embodiments of the present invention are explained in more detail below with reference to the accompanying drawings. Of course, the combination of the various elements and components may also differ from that shown. Reference numbers for mutually corresponding elements are used in different figures and may not be re-described for each figure.

The figures show schematically:

FIG. 1 a: a first exemplary embodiment of a combination of an insert element according to the invention and a lens mount according to the invention is viewed from a first side;

FIG. 1 b: the combination of fig. 1a is viewed from a second phase side opposite the first side;

FIG. 1 c: cross-sectional views of the embodiment shown in fig. 1a, 1b of an insert element according to the invention;

FIG. 1 d: FIGS. 1a, 1b show cross-sectional views of a combination with an insert element inserted into a lens mount;

FIG. 2 a: a second exemplary embodiment of a combination of an insert element according to the invention and a lens mount according to the invention is viewed from a first side;

FIG. 2 b: the combination of fig. 2a is viewed from a second side opposite the first side;

FIGS. 3a-3 c: a sequence of manufacturing steps for manufacturing an insertion element according to the invention according to one embodiment;

FIG. 4 a: another exemplary embodiment of a combination of an insert element according to the present invention and a lens mount according to the present invention is viewed from a first side;

FIG. 4 b: the combination of fig. 4a is viewed from a second side opposite the first side;

fig. 5a, 5 b: alternative embodiments of the lens interface according to the invention are seen from two different viewing directions;

fig. 6a, 6 b: another embodiment of a lens mount according to the present invention is seen from two different viewing directions;

fig. 7a, 7 b: FIG. 1d shows a combination with a first embodiment of a head screw for detaching a bonded insertion element and a support disk (seen in both directions of view);

FIG. 7 c: the support disc and cap screw of figures 7a, 7b are shown separately;

fig. 8a, 8 b: FIG. 1d is a combination with a second embodiment of a head screw for detaching a bonded insertion element and a support disc (seen in both viewing directions);

FIG. 8 c: the support disc and cap screw of figures 8a, 8b are shown separately.

Detailed Description

Fig. 1a shows a perspective view of an exemplary embodiment of an insertion element 10 according to the present invention before insertion into an object connection 20 according to the present invention. The viewing direction is from obliquely forward so that the surface facing the lens is especially visible.

While fig. 1b shows the same combination of lens mount 20 and insert element 10 as seen from diagonally behind before insertion, so that the surface intended to face the photosensitive recording medium is visible in particular.

Fig. 1c and 1d show the insertion element 10 in cross section, in isolation (fig. 1c) or in insertion into the lens mount 20 (fig. 1 d). Fig. 1a, 1b, 1c and 1d are described simultaneously below.

The insertion element 10 comprises a frame element 11, which in the present case is designed as a filter holder and has a passage D for the set beam path L. The frame element has a step 13 on its surface facing the base surface 21 of the lens mount 20 when inserted, in the embodiment shown a filter or cover glass 12 being inserted in the step. In an alternative embodiment variant, which may be advantageous, for example, for monochrome cameras, the frame element can be used without such a filter or protective glass as a picture frame which delimits or delimits an area on the photosensitive recording medium onto which light incident through the corresponding lens can impinge (not shown).

The surface of the frame element 11 which faces the base surface 21 of the lens mount 20 when the insert element 10 is inserted and is visible in fig. 1a can also have a three-dimensional contour, for example a circumferential collar (in particular on its outer edge), which faces a lens projection (not shown) to be inserted.

In the frame element 11 of the insert element 10 shown in fig. 1a to 1d, two diametrically arranged

detachment holes

14a,14b are arranged; in the inserted state, they open onto the base surface 21 of the lens mount, so that the screws (e.g. threaded rods) that are to be passed through during the disassembly process come to bear against the base surface and, when screwed in further, push the insert element 10 away from this base surface (not shown). In this way, the adhesive connection of the insert element 10 and the lens mount 20 can be cleanly released.

The frame element 11 (and with its insert element 10) has an outer edge 17 extending along the circumference of the cylinder; the outer edge is thus circular in a plane perpendicular to the arranged beam path. In this way, the insert element fits precisely into the cylindrical receiving area 24 of the lens interface 20.

An adhesive ring 15 is fastened to the frame element 11 with the

removal openings

14a,14b exposed, said adhesive ring annularly surrounding the passage D. In particular, the adhesive ring extends along a closed curve around the passage D.

The outer edge of the adhesive ring extends along the outer edge 17 of the insertion element over more than 80%, in the present case even over more than 90%, of its length; the outer edge of the adhesive ring is preferably spaced at least 0.1mm or even at least 0.15mm from the outer edge 17 (i.e. offset towards the channel D). Thereby preventing the insert element from accidentally sticking in the lens receiving area of the corresponding lens mount upon insertion. While in the region of the detachment holes 14a,14b, the outer edges of the adhesive rings respectively have a corrugated shape which wraps around about half of the corresponding outer circumference of the detachment holes 14a,14 b. In particular, the adhesive ring 15 extends between the passage D and the detachment holes 14a,14b, so that the detachment holes are arranged outside the adhesive ring.

The loop width B of the adhesive loop varies along its circular trajectory around the channel; the loop width is preferably in the range of at most 4mm, at most 3mm or at most 2.5mm and/or at least 0.6mm, at least 1mm or at least 1.2 mm.

In the inner region surrounded by the adhesive ring, on the surface of the base surface 21 of the frame element which faces the lens mount 20 during insertion, four

projections

16a,16b,16c,16d are formed (in the direction following the provided beam path), which are now shaped as conical pins. These projections are provided for engagement in a corresponding

peripheral frame

23a,23b,23c,23d (in the present case in the form of guiding edge sections) formed on the base surface 21 when the insert element is inserted. The

projections

16a,16b,16c,16d thus serve as positioning aids when the insert element 10 is inserted into the lens mount 20.

The frame element can in particular be made of plastic, for example by means of injection molding; in this case, the

projections

16a,16b,16c,16d may preferably be injection molded. In order to improve the release from the injection molding tool, the projections may in particular have a release angle in the range from 1 ° to 2 °.

The adhesive ring 15 can be designed, for example, as a double-sided adhesive film, one side of which is adhered to the frame element 11. Here, the adhesive ring also extends over the edge region of the filter or protective glass 12, in the present case over its corners (and is thus also firmly bonded to these corners). In the variant in which the filter or the protective glass is not glued into the frame element or its step 13 but merely placed in it, the filter or the protective glass is therefore held in the frame element by the glue ring.

The surface of the adhesive ring 15 facing away from the frame element or the mentioned region is provided for adhesion in the inserted state of the insert element to a three-dimensional structure which is formed on a base surface 21 of the lens mount facing the insert element. In the embodiment shown, the structure comprises a continuous rib 22, which protrudes from said base surface. The rib surrounds the opening

The closed curve of (a) runs annularly, through which opening the beam path L set when using the camera can be irradiated onto a photosensitive recording medium, for example at least one sensor (not shown).

By gluing the insert element 10 in the lens mount 20, a simple, detachable, sealed, wear-free and chip-free fixing of the insert element 10 is made possible, which is particularly suitable for applications in the field of high precision in medical technology and/or microscopes.

The ribs 22 have a width b (which in the present case remains continuously the same) which is preferably at most 1.5mm or at most 1mm and/or at least 0.2mm or at least 0.4 mm. In particular, the rib configuration is narrower than the adhesive ring, i.e. the width B of the rib is smaller than the ring width B of the adhesive ring (in each case along a circular path). This ensures that the adhesive ring adheres more strongly to the frame element 11 than to the rib 22, so that the adhesive ring can be released from the rib 22 without leaving any residue when the insert element is removed (for example, for replacing or cleaning a filter or a protective glass 12).

In the bonded state of the insert element 10, the rib 22 preferably runs along the center line or center curve of the adhesive ring, so that the maximum possible distance from the edge of the rib to the cutting edge (of the outer contour and of the inner contour) of the adhesive ring is achieved: the adhesive action between the filter holder and the adhesive ring can thus work optimally and does not detach from the filter holder when the filter holder assembly is disassembled.

The adhesive ring 15 is preferably made of an elastic material, such as a foam material. The ribs 22 can therefore be partially pressed into the adhesive ring 15 when the insert element 10 is inserted into the lens mount, thus improving the connection, and the adhesive ring, on account of its elasticity, has a compensating effect on the different thermal expansions of the different materials.

Fig. 2a to 2b show a variant of the lens mount 20 according to the invention, which is also shown in fig. 1a, 1b, 1d, and an alternative insert element 10' according to the invention, which is detachably inserted into the lens mount 20. The insert element 10' differs from the insert element 10 described above in that no filter or protective glass is inserted into the frame element 11, which is designed as a filter holder. Thus, the insert element 10' may be used as a picture frame, for example in a monochrome camera.

The surface of the frame element 11 which faces the base surface of the lens mount 20 when the insert element 10' is inserted, which surface is visible in fig. 2a (for example in an alternative variant), can in turn have (in particular on its outer edge) a contour, for example a circumferential bead, which faces a lens projection (not shown) to be inserted.

Fig. 3a to 3c show the steps of the method according to the invention for producing an insertion element, in the present case also the insertion element 10 shown in fig. 1a to 1 d.

As shown in fig. 3a, an adhesive ring 15 is provided as adhesive material for this purpose, on which a removable protective film 18 with a pull tab 181 is arranged. The adhesive ring may be stamped, for example, from a face-type elastomeric material; the method may include such stamping out (not shown).

In addition to the pull tab 181, in the present case the protective film has a circular outer contour with an outer projection relative to the adhesive ring in the region of the two

main positioning holes

182a,182b in the protective film 18. These holes are arranged outside the adhesive ring 15.

Further, the removable protective film 18 has four

minor positioning holes

183a,183b,183c,183d, respectively in regions adjacent to the inner edge of the adhesive ring.

To produce the insert element 10, a filter or a protective glass 12 is first inserted into the corresponding step 13 of the frame element 11. The filter or protective glass 12 can be glued in (preferably by means of an adhesive which is elastic after curing) or it can be merely inserted.

An adhesive material in the form of an adhesive ring 15 is then applied to the frame element, wherein the corner regions of the filter or protective glass 12 are also partially covered. As can be seen from fig. 3b, 3c, the

primary positioning holes

182a,182b are aligned with the dismounting

holes

14a,14b in the frame element 11 during application.

The correct positioning of the adhesive ring 15 on the frame element 11 is simplified in that the four

protrusions

16a,16b,16c,16d on the frame element pass through the

secondary positioning holes

183a,183b,183c,183 d.

In fig. 3c, the completed insert element 10 is shown, on which a removable protective film 18 is also arranged (on its surface facing the base surface of the lens holder). The insert element can thereby be protected against accidental sticking, for example for transport and/or storage. The protective film 18 is removed before the insertion element 10 is inserted into the lens mount.

Fig. 4a, 4b show a perspective view of a further embodiment of an insert element 10 ″ according to the invention together with a lens mount 20 from two different directions. The lens mount is constructed as in fig. 1a, 1b, 1d and fig. 2a, 2 b; of course, other variations are possible. In the present case, the lens mount 20 is advantageously suitable for selective use, in particular with an insert element 10, an insert element 10' or with an insert element 10 ″ as shown in fig. 4a, 4b, respectively, as described above.

The insert element 10 "comprises a frame element 11" which is configured as a picture frame in the form of a flat-sided, preferably form-stable film or plate, which may be made (wholly or partly) of plastic and/or metal, for example. In the frame element 11 "are arranged a channel D" and dismounting holes 14a ", 14 b".

The adhesive rings 15 and 15 ″ shown by way of example in fig. 1b, 2b, 3a and 4b have the same shape; of course, this shape is only one of many possibilities. In particular, the adhesive ring may have, instead of the frame element 11 ", the same shape as the frame element 11" itself; in this case, the adhesive material can be applied as a continuous film to the substrate, which is also configured as a continuous plate or film, during the production of the insert, and the outer edges of the channels, the removal openings and/or the insert can be punched into the laminate thus formed from the adhesive material.

Fig. 5a, 5b show two views of an alternative embodiment of a lens interface 20' according to the present invention. It has a base surface 21' facing the insertion element to be inserted, on which a three-dimensional structure is formed for abutting against the adhesive ring of the insertion element. Currently, the structure comprises a plurality of recesses 22' for making the (effective) bonding surface between the lens mount and the adhesive ring smaller than the bonding surface between the adhesive ring and the insert element. This ensures that the adhesive ring is released without leaving behind from the base surface 21' when the insertion element is removed, and from the frame element of the insertion element. In the exemplary embodiment shown in fig. 5a, 5b, the recesses are each bordered by a polygon, in the present case in particular each having a quadrilateral (i.e. rectangular or trapezoidal) basic shape.

Similarly, fig. 6a, 6b show two views of another embodiment of a lens mount 20 "according to the present invention. It has a base surface 21 "facing the insert element to be inserted, which base surface has a three-dimensional structure, which in this example comprises a plurality of recesses 22", each having a circular base surface.

Fig. 7a, 7b each show, like fig. 1d, an inventive insert element 10 inserted into a lens mount 20 according to the invention. The insert element is removed by means of the support disc 30 and the corresponding cap screw 31. Fig. 7b shows a view axially through the cylindrical receiving area of the lens mount in the direction of the set beam path, and fig. 7a shows a cross-sectional view along the line a-a marked in fig. 7 b. The insert element 10, the support disc 30 and the cap screw 31 form an embodiment of the assembly according to the invention.

The support disk 30 rests on an edge 25 of the lens mount 20, which surrounds a cylindrical receiving area for the lens. The cap screws 31 pass through holes 32 in the support disc, which are aligned with the removal holes 14a,14b in the insert element 10, and are screwed into the removal holes in the illustrated state; the screw thread can already be formed in the removal opening or can be tapped by a cap screw when first screwed into the removal opening.

In the state shown in fig. 7a, the heads of the cap screws bear against the respective support disk 30. They are guided loosely through the holes 32 of the support disk 30 and are thus not screwed in particular to the support disk 30; the bore 32 and/or the cap screw are preferably configured without a thread in the head region (in this state the head region extends within the bore 32). By continuing the screwing, the insert element is pulled towards the bearing disk 30, which thus acts as a support element, and is thus pulled out of the lens mount; thereby especially releasing the adhesive connection between the insert element and the lens mount.

Here, the cap screw is too short to abut against the base surface 21 of the lens mount 20. Contact between the cap screw and the base surface is thus avoided and the generation of abrasive dust particles during the removal of the insert element is thus prevented.

Fig. 7c shows a perspective view of the cap screw and the support disk 30, which may preferably be formed at least partially from sheet metal. In the exemplary embodiment shown, the support plate is configured annularly with a circular outer circumference.

Fig. 8a, 8b each show, similarly to fig. 1d, an insert element 10 according to the invention which is inserted into a lens mount 20 according to the invention. The insert element is removed here by means of a replacement support disk 30 'which rests on the edge 25 of the lens mount 20 and a corresponding cap screw 31'. The perspective view of fig. 8B again passes axially through the receiving area of the lens interface in the direction of the set beam path, fig. 8a showing a cross-sectional view taken along the line B-B marked in fig. 8B.

In this embodiment, the support disk 30 "has an alignment aid 33" in the form of a three-dimensional structure, which alignment aid 33 "is provided for supporting the support disk in its supporting state in its correct position on the edge 25 of the lens mount 20. In particular, the edge may be partially enclosed by the three-dimensional structure. In the present case, the alignment aid 33' is provided by four bolts which are each guided through a hole in the support disc and are fixed with nuts.

Fig. 8c shows a perspective view of the cap screw and the support disk 30', which in turn can preferably be formed at least partially from a metal plate. The support disc 30 ", the cap screw 31' and the insert element 10 form a further embodiment of the assembly according to the invention.

In the embodiment of the support disk shown in fig. 8a to 8c, the principle of disassembly and the situation shown in each case are the same as in the variant shown in fig. 7a, 7b, and therefore no further description is given.

An

insert element

10,10',10 "is disclosed which can be inserted into a lens interface 20 of a camera. The insert element 10,10 'comprises a

frame element

11,11 "and an adhesive ring 15,15' fixed to the frame element for adhering the insert element in the lens mount. A passage for the provided beam path is formed in the frame element, around which passage the adhesive ring surrounds. The insert element also has at least two

successive detachment holes

14a,14b,14a ', 14 b'.

Furthermore, a lens interface 20 of a camera is disclosed for receiving such an insert element 10, 10'. The lens mount has a base surface 21 facing the insert element to be inserted, on which the three-dimensional structure for bearing against the adhesive ring of the insert element projects in the direction of the insert element to be inserted. An assembly with an insert element and a support disc as a removal tool, a camera with an insert element 10,10' and a lens mount 20 and a method for manufacturing an insert element are also disclosed.

List of reference numerals

10,10' insert element

11, 11' frame element

12 filters or protective glasses

13 step

14a,14b,14a ", 14 b" removal holes

15,15' adhesive ring

16a,16b,16c,16d projection

17 outer edge of frame element 11

18 protective film

20,20' lens holder

21,21' base surface

22 ribs of the base surface 11

22', 22' base surfaces 21', 21'

23a,23b,23c,23d surround the frame of the

projections

16a,16b,16c,16d

Receiving area of 24 lens interface

25 edge of lens interface 20

30,30' support disc

31,31' cap screw

32 empty in the supporting tray

33' alignment aid for supporting disks

181 pull tab

182a,182b are primarily pilot holes

183a,183b,183c,183d minor alignment holes

Width of the b-rib 22

B ring width of

adhesive ring

15,15 ″

D, D' diameter

L predetermined beam path

Claims

1. An insert element (10, 10',10 ") for detachable insertion into a lens interface (20) of a camera, wherein the insert element comprises:

-a frame element (11, 11 ") in which channels (D, D") for the set beam paths (L) are formed and which has at least two removal holes (14a, 14b,14a ", 14 b"), and

-an adhesive ring (15, 15 ") fixed to the frame element (11, 11") for adhering the insert element in the lens mount, wherein the adhesive ring (15, 15 ") surrounds the channel (D, D").

2. An insert element according to claim 1, wherein the frame element (11 ") is configured as a picture frame in the form of a film or a plate.

3. An insert element according to claim 1, wherein the frame element (11) is configured as a filter holder with a surface in which a step (13) for receiving an edge of a filter or a cover glass (12) is arranged.

4. An insert element according to claim 3, wherein the filter holder comprises a filter or a cover glass (12) mounted in the step (13).

5. Insert element according to claim 3 or 4, wherein the surface of the filter holder facing the base surface (21) of the lens interface when inserted has one, two or more protrusions (16a, 16b,16c,16 d) as positioning aid for the insert element (10).

6. Insert element according to one of claims 1 to 4, wherein at least one or at least two of the removal holes (14a, 14b,14a ", 14 b") are arranged outside the adhesive ring (15, 15 ").

7. Insert element according to one of claims 1 to 4, wherein the adhesive ring (15, 15 ") is at least partially composed of a double-sided adhesive film.

8. Insert element according to one of claims 1 to 4, wherein the adhesive ring (15, 15 ") is at least partially composed of an elastic material.

9. The insert element of claim 8, wherein the resilient material is a foam material.

10. An assembly comprising an insert element according to any of claims 1 to 9 and a support disc as a disassembly tool, the support disc being arranged for placement on a surface of the lens mount and having at least two holes which align with the disassembly holes when the support disc is properly positioned.

11. Lens mount (20) of a camera, which is provided for receiving an insert element (10, 10',10 ") according to one of claims 1 to 9, wherein the lens mount has a base surface (21, 21', 21") facing the insert element to be inserted, on which base surface a three-dimensional structure is configured for resting on an adhesive ring (15, 15 ") of the insert element, wherein the three-dimensional structure comprises one or more protrusions facing in the direction of the insert element to be inserted and/or one or more recesses (22', 22") facing in the opposite direction.

12. Camera with a lens mount (20) according to claim 11 and an insert element (10, 10',10 ") according to any one of claims 1 to 9 that can be inserted or inserted therein, wherein the adhesive ring (15, 15") of the insert element and the three-dimensional structure of the lens mount are provided for abutting against one another in the inserted state of the insert element.

13. A method of manufacturing an insert element (10, 10',10 ") for detachable insertion into a lens mount (20) of a camera, the insert element having a frame element and an adhesive material arranged thereon, the method comprising applying the adhesive material onto a surface of a mount, wherein

-the base is configured as a frame element (11) with a passage (D) for the provided beam path (L), and the adhesive material is applied in such a way that it annularly surrounds the passage leaving at least two detachment holes (14a, 14b) in the frame element; or

-the base is configured as a continuous film or plate in which, after the application of the adhesive material, a channel (D ") for the provided beam path and at least two removal holes (14 a", 14b ") are punched for forming the frame element (11").

14. Method according to claim 13, wherein a removable protective film (18) is arranged on the adhesive material, which protective film is provided for being removed after the application of the adhesive material, thereby releasing an adhesive face for fixing the insert element (10, 10',10 ") in the lens mount.

15. The method according to claim 14, wherein the mount is provided as a frame element (11) with a passage for the provided beam path, and wherein applying an adhesive material onto the frame element (11) comprises:

-positioning at least two main positioning holes (182a, 182b) in the protective film (18) in alignment with at least two dismounting holes (14a, 14b) in the frame element, and/or

-passing each protrusion (16a, 16b,16c,16 d) on the frame element through at least two minor positioning holes (183a, 183b,183c,183 d) and/or in the protective film

-orienting at least a part of the outer contour of the protective film (18) in alignment with the outer edge (17) of the frame element (11).

16. Method according to any one of claims 13 to 15, wherein the base is configured as a frame element in the form of a filter holder having a step (13) for receiving an edge of a filter and/or a cover glass (12), and the method comprises, before applying the adhesive material, inserting the filter or the cover glass (12) into the step.