Sterile cover for a medical imaging device and sterile medical imaging system

Abstract

The invention relates to a sterile cover (30) for a medical imaging device (10), comprising a frame member (40) configured to cover an imaging front side (10a) of the medical imaging device (10), wherein a side facing side (41) of the frame member (40) serves as a side intended to face the imaging front side (10a) of the medical device (10), and at least one transparent cover portion (50) within the frame member (40), arranged to allow imaging through the medical imaging device (10) at least when the frame member (40) is attached to the medical imaging device (10), wherein the frame member (40) comprises at least two attachment portions (42) configured to provide a form-fit connection with corresponding attachment portions (11) of the medical imaging device (10).

Description

TECHNICAL FIELD

[0001] The present invention relates to a sterile cover for a medical imaging device, in particular a microscope, and a sterile imaging system having such a cover. BACKGROUND

[0002] The use of medical imaging devices in a sterile environment requires a sterile handling of such medical imaging devices. Therefore, medical imaging devices are usually covered by a foil and a sterile cover, wherein the sterile cover is adapted to at least partially enclose the imaging portion of the medical imaging device. Currently, such a sterile cover is pushed onto the imaging portion of the medical imaging device and attached to the imaging portion by a frictional locking caused by a pressing force. The stationary portion of the medical imaging device is provided by parallel surfaces to achieve a firm frictional locking. However, parallel surfaces can not always be desired, for example in view of a medical microscope having a tilted objective, wherein the housing should also provide a tilted surface to reduce the external potentially disturbing profile. In this case, surfaces deviating from a parallel arrangement can not be eligible to provide a firm frictional locking. SUMMARY

[0003] It is therefore an object of the present invention to provide a sterile cover which increases the design freedom of a medical imaging device while still allowing a firm fastening of the sterile cover.

[0004] This object is achieved by a sterile cover for a medical imaging device according to claim 1 and a sterile medical imaging system according to claim 10. Further aspects of the present invention are subject matter of the dependent claims.

[0005] According to one aspect, a sterile cover for a medical imaging device, the sterile cover comprising a frame member configured to cover an imaging front side portion of the medical imaging device, wherein a facing side portion of the frame member serves as a side portion intended to face the imaging front side portion of the medical device, and at least one transparent cover portion within the frame member, the at least one transparent cover portion being arranged to at least allow imaging through the medical imaging device when the frame member is attached to the medical imaging device, wherein the frame member comprises at least two attachment portions configured to provide a positive-fit connection with corresponding attachment portions of the medical imaging device.

[0006] Thus, the sterile cover can be attached to the medical imaging device by a form- or positive-lock connection instead of providing only a frictional lock. However, such a frictional lock can still be provided to support the form-fit connection. The terms "form-fit", "positive-lock" or "form-lock" can be used synonymously. The respective attachment portions of the sterile cover can not only allow for a tilted fixation of the medical imaging device, but can also provide for an increased design freedom of the outer surface, as long as the medical imaging device provides at least a corresponding counter-connection portion for engaging with the connection portion in terms of the form-fit connection. Furthermore, the proposed form-fit connection can be less sensitive to manufacturing tolerances compared to a frictional lock.

[0007] Due to the at least two attachment portions, it is less likely that the frame member is attached loosely to the medical imaging device or is prone to tilting.

[0008] As a further advantage, due to the form-fit connection, the sterile cover can be attached to and detached from the medical imaging device without using any tools.

[0009] Advantageously, the at least two attachment portions are provided on the facing side of the frame member in two opposite positions.

[0010] Thereby, the likelihood of a respective tilting of the frame member or the sterile cover is further reduced. Furthermore, by providing the at least two attachment portions on the facing side of the frame member, a potential interference profile during a sterile treatment of the medical imaging device with the attached sterile cover is further reduced.

[0011] The two opposite attachment portions can also support a parallel attachment of the sterile cover on the medical imaging device. A parallel attachment can reduce the likelihood of a bending or otherwise distorting of the sterile cover and thus reduce the risk of a breakage of the transparent cover portion.

[0012] In some embodiments, the at least two attachment portions are configured as resilient snap-fit members, which preferably protrude from a periphery of the frame member in a direction out of the facing side of the frame member.

[0013] The resilient snap-fit members can be easily implemented and can only require a corresponding recess and / or protrusion provided by the medical imaging device to implement the form-fit connection. In particular, if such snap-fit members protrude from a periphery of the frame member in a direction out of the facing side of the frame member, the medical device can not necessarily be provided with a corresponding form-fit connection member or form-fit connection portion on the imaging front side but on a peripheral surface relative to the imaging front side. Thus, the imaging front side of the medical device can not be affected by the form-fit connection and the medical imaging device can also be more easily retrofitted.

[0014] Alternatively or additionally, the attachment portion can be configured as a bayonet connector, a tongue-and-groove member or the like.

[0015] Advantageously, the snap-fit member is configured such that, when the medical imaging device extends with a positive convergence angle outwards from the imaging front side, a gap is provided between the respective snaps of the snap-fit member and the imaging front side of the medical imaging device parallel to the facing side of the frame member, which gap is preferably less than 4 mm.

[0016] In other words, the distance between the two opposing snaps is greater than the imaging front side of the medical device when the sterile cover is oriented for attachment to the medical imaging device. Thus, the snap-fit member does not elastically deform at the beginning of the attachment process, but elastically deforms during the further movement of the sterile cover in the attachment direction, i.e. during the movement of the respective snaps beyond the imaging front side.

[0017] Due to this gap, the required elastic deformation can be reduced and thus the choice of material and design can be increased.

[0018] However, since the size of the gap and the convergence angle influences the movement distance of the sterile cover to provide sufficient elastic deformation for the snap-fit locking, it can be desirable to limit this movement distance by limiting the gap. Advantageously, the gap is limited to less than 4 mm, in particular the convergence angle is limited to about 84° to 87°.

[0019] In some embodiments, the frame member further comprises at least one guide member protruding from the facing side of the frame member intended to be received by a recess on the imaging front side of the medical imaging device.

[0020] The guide member can support the attachment process by its guiding function at least in indicating the correct orientation. In particular, the guide member is provided with at least one length protruding from the facing side of the frame member which allows the guide member to be received by the corresponding recess of the medical imaging device before or while the attachment portion is engaged with the corresponding attachment portion of the medical imaging device.

[0021] Preferably, the ratio of the protruding length of the at least one guide member to the protruding length of the snap-fit member protruding from the facing side of the frame member to the respective end of the snap opposite to the facing side is less than 1, preferably between 0.41 and 0.74.

[0022] In case the protruding length of the one or more guide members is less than the protruding length of the snap-fit member, the guide member can interfere with imaging components or any other components or profiles of the medical imaging. In particular, a ratio of 0.41 to 0.74 has been determined to reduce the protruding length of the guide member while still allowing sufficient guiding.

[0023] Furthermore, a ratio of a cross section of the at least one guide member perpendicular to the protrusion length to a corresponding cross section of the recess on the imaging front side of the medical imaging device can be less than 1, preferably between 0.15 and 0.9.

[0024] Due to the cross section of the guide member being smaller than the cross section of the corresponding recess on the imaging front side, the guide member can be easily introduced into the recess. In addition, this configuration can be less sensitive to manufacturing tolerances and the like. In order to enhance this effect, a ratio of 0.9 or less can be advantageous. However, a ratio of less than 0.15 can result in insufficient guidance of the guide member within the recess and the likelihood of tilting can increase.

[0025] In some embodiments, at least one of the at least two attachment portions of the frame member and / or the at least one guide member is configured to open or close an electrical circuit of the medical imaging device, preferably to act as a limit switch or an electrical contact.

[0026] It can be necessary to open or close such an electrical circuit in order to operate the medical imaging device or specific functions thereof. Alternatively or additionally, the opening or closing of such an electrical circuit can be provided with an optical and / or acoustic indicator indicating proper attachment of the sterile cover to the medical imaging device. For example, a light is turned on or off when the guide member has closed or opened the respective electrical circuit.

[0027] In case the guide member acts as a limit switch, the closing and / or opening of the electrical circuit is associated with the final attachment position of the sterile cover. Thus, the functionality of the limit switch can support safety aspects. Alternatively or additionally, in case the guide member acts as an electrical contact, the closing of the contact or electrical circuit is less prone to be the result of anything other than the electrical contact. For example, the opening of the electrical circuit can also occur due to a breakage of an electrical wire or the like. In contrast, closing the electrical circuit is less likely to occur unintentionally.

[0028] Advantageously, the transparent cover portion has a thickness in the imaging direction of 0.4 mm to 0.6 mm. Preferably, the transparent cover portion has a refractive index of about 1.49.

[0029] Due to the combination of the thickness in the imaging direction when attached to the medical imaging device and the refractive index of approximately 1.49, the focus of the medical imaging device or imaging component, respectively, can not be significantly shifted when the medical imaging device is operated around the point of interest. In other words, the focus remains essentially constant at the point of interest during the rotation of the medical imaging device. Although control can compensate for the focus shift by adjusting the distance between the medical imaging device and the point of interest depending on the rotation angle, such control can become very complex.

[0030] By using PMMA, i.e. polymethyl methacrylate, as a material for the transparent cover portion, a refractive index of approximately 1.49 can be achieved. Deviations from the defined refractive index and the corresponding thickness of the transparent cover impair the control of the focal point in combination.

[0031] In another aspect, the present application relates to a sterile medical imaging system comprising a medical imaging device and a sterile cover as described above, wherein an outer portion of the medical imaging device extends outwardly from an imaging front side of the medical imaging device with a positive convergence angle, and wherein the outer portion of the medical imaging device extending outwardly from the imaging front side of the medical imaging device comprises at least two attachment portions corresponding to the attachment portions of the sterile cover, which are preferably recessed into said outer portion.

[0032] Thus, the attachment portions of the medical imaging device are configured to engage with the corresponding attachment portions of the sterile cover to form a form-fit connection. Depending on the design of the attachment portions of the medical imaging device and / or the sterile cover, the form-fit connection can be further supported by a press-fit element. For example, a snap of a snap-fit member as an attachment portion of the sterile cover can not only engage in a form-fit connection with a recess of the medical imaging device. If the snap member is still elastically deformed when arranged in the form-fit connection, the snap can also exert a compression force on the recess or the medical imaging device, respectively. Thus, the attachment can be made more secure more effectively.

[0033] Furthermore, when the attachment portions of the medical imaging device are recessed in the outer portion of the medical imaging device, the number of potentially outwardly protruding profiles can be reduced and, thus, the number of disturbing profiles of the medical imaging device can be reduced.

[0034] Preferably, the positive convergence angle is equal to or smaller than 15°.

[0035] The positive convergence angle can correspond to a convergence angle of an optical component of the medical imaging device. Thus, a compact medical imaging device can be provided. Furthermore, the limited convergence angle can also make the design of the attachment portions of the sterile cover easy to engage on the outer portion with the attachment portions of the medical imaging device.

[0036] In some embodiments, a surface of the transparent cover portion facing the at least one imaging component forms an angle of approximately 84° to 87° with an optical axis of said at least one imaging component, wherein a distance between the surface of the transparent cover and a surface of the imaging component facing the transparent cover is preferably equal to or smaller than 25 mm.

[0037] The 84° to 87° angle between the surface of the sterile cover facing the medical imaging device and the optical components of the medical imaging device also supports sufficiently stable focusing, especially considering the thickness of the transparent cover portion of the sterile cover and the approximately 1.49 refractive index of the transparent cover portion.

[0038] Furthermore, if the distance between the surface of the transparent cover and the surface of the imaging component facing the transparent cover is greater than 25 mm, the amount of light scattered from the area of ​​interest due to illumination may impair imaging of the imaging component through the medical imaging device. In other words, the amount of scattered light entering any imaging component can be sufficiently limited by restricting the distance between the surface of the transparent cover and the surface of the imaging component.

[0039] Preferably, the guide member of the sterile cover and / or the at least two attachment portions of the sterile cover are configured to provide only one attachment orientation with the at least two attachment portions of the medical imaging device.

[0040] The attachment portion can be positioned, for example, such that the sterile cover can only be attached along one orientation of the sterile cover relative to the medical imaging device. It may be advantageous if the transparent cover portion allows an unobstructed view of the imaging component through only one orientation of the sterile cover. Alternatively or additionally, a defined orientation of the sterile cover to be attached can also be provided by at least one guide member and / or attachment portion having a protruding length, for example, that fits only in a corresponding recess of the medical imaging device to allow the attachment portion of the sterile cover to move into engagement with the attachment portion of the medical imaging device. In other words, any measures to reduce the possibility of misalignment are intended to allow attachment only along a defined orientation of the sterile cover relative to the medical imaging device, and / or at least limit the functionality of the medical imaging device, and / or indicate misalignment in undesirable positional relationships.

[0041] Advantageously, the medical imaging device includes a circuit (13) capable of being closed by at least one of the at least two attachment portions of the sterile cover (30) and / or at least one of the at least one guiding member of the sterile cover.

[0042] As already described in the context of sterile coverings, this circuitry can be used to indicate the intended attachment of the sterile covering to a medical imaging device. Furthermore, alternatively or in addition to the measures described above, the circuitry can be opened or closed only when the sterile covering is attached to the medical imaging device in the correct orientation.

[0043] In some implementations, the medical imaging device of the sterile medical imaging system is a microscope.

[0044] Other advantages, aspects, and details of this disclosure are subject to the claims, and the following description of preferred embodiments applies the principles and drawings of this disclosure. In the drawings, the same reference numerals denote the same features and functions. Attached Figure Description

[0045] Figure 1 This is a schematic cross-sectional view of a sterile covering and a medical imaging device according to an exemplary embodiment;

[0046] Figure 2 According to the aseptic cover attached to the medical imaging device Figure 1 Schematic cross-sectional view of a sterile covering and a medical imaging system;

[0047] Figure 3 It is based on Figure 1 and Figure 2 A magnified view of the sterile covering and the area of ​​the medical imaging device facing the sterile covering; and

[0048] Figure 4 This is an exemplary view of the design of the guide member and the recess. Detailed Implementation

[0049] Figure 1 This is a schematic cross-sectional view of the medical imaging device 10 and sterile cover 30 of the sterile medical imaging system 1. The medical imaging device 10 includes an imaging front portion 10a facing the sterile cover 30 in an attachment orientation, wherein the sterile cover 30 can be attached to or detached from the medical imaging device 10 by bidirectional movement as indicated by the double arrows. An outer portion 10b of the medical imaging device 10 extends outward from the imaging front portion 10a. The convergence angle α of the outer portion 10b is... Figure 3 The convergence angle is similar to that of the imaging components 20a and 20b of the imaging unit 20. Here, each imaging component 20a and 20b is constructed as an eyepiece, and each imaging component 20a and 20b is positioned at an angle between them to align on a common area of ​​interest. Due to the similar convergence angle, the profile of the medical imaging device 10 can be designed to be compact. In the illustrated embodiment, the outer portion 10b also includes two attachment portions 11 formed by recesses to receive corresponding attachment portions of the sterile cover 30, as described later. In addition, the imaging front portion 10a is provided with two recesses 12, which allow the sterile cover 30 to be guided by moving the corresponding guide member 43 within the recesses 12. It should be noted that the number of attachment portions 11 and / or recesses 12 is not limited to this. Figure 1The number shown in the exemplary embodiments. However, at least two corresponding attachment portions 11 and / or recesses 12 provide at least some stability in reducing the possibility of the sterile cover tilting without an excessive number of connecting parts. However, increasing the number of attachment portions 11 and / or recesses 12 can provide more options for attaching and / or guiding different types of sterile covers 30 to and / or guiding them to the medical imaging device 10.

[0050] The sterile cover 30 includes a frame member 40 and a transparent cover portion 50. The transparent cover portion 50 is attached to the frame 40 and configured to allow the imaging unit 20 of the medical imaging device 10 to image the area of ​​interest through the transparent cover portion 50, which is simultaneously positioned in front of the medical imaging device 10 by attaching the frame member 40 to the medical imaging device 10. The frame member 40 has a facing side 41 intended to face the imaging front side 10a of the medical imaging device 10 along the attachment orientation. The transparent cover portion 50 may be disposed within the frame member 40 such that the surface of the transparent cover portion 50 opposite to the facing side 41 is flush with the frame surface, which is also opposite to the facing side 41 to be sterilized or disinfected, without interfering with the contours. Alternatively, this surface of the transparent cover portion 50 may be recessed within the frame member 40 to enhance protection of the transparent cover portion 50.

[0051] The frame member 40 also includes two attachment portions 42 intended to engage with attachment portions 11 of the medical imaging device 10 to attach the sterile cover 30 to the medical imaging device 10. According to the illustrated embodiment, the attachment portions 42 are configured as snap-fit ​​members projecting from the facing side 41 of the frame member 40 at opposite ends. Here, the snap-fit ​​members project perpendicularly to the facing side 41. However, the attachment portions 42 may project at an angle deviating from 90°, for example, according to design constraints, regardless of their specific design. The attachment portions 42 of the snap-fit ​​members are configured to provide a snap at each corresponding end opposite the facing side 41.

[0052] In addition, frame member 40 includes guide member 43, which also protrudes from facing side 41. Depending on the guiding function, guide member 43 protrudes substantially perpendicular to facing side 41. However, slight deviations may occur depending on specific design options.

[0053] Figure 2 With Figure 1The same cross-section shows the sterile cover 30 attached to the medical imaging device 1. The sterile cover 30 is attached by a relative movement to reduce the distance between the facing side 41 and the imaging front side 10a. Therefore, the attachment portion 42, which is a resilient snap-fit ​​member with snaps 42a, elastically deforms into at least some extensions beyond the outer portion 10b before reaching the corresponding attachment portion 11. When the snaps 42a reach the attachment portion 11, which is formed as a notch in this exemplary embodiment, the snaps 42a are forced into these notches due to the elastic restoring force of the resilient attachment portion 42.

[0054] The optical axes of the imaging components 20a and 20b of the imaging unit 20 or the imaging components 20a and 20b are respectively relative to Figure 2 The vertical axis of the image is tilted by 5°. In other words, the imaging components 20a and 20b are positioned at a convergence angle of 10° relative to each other. Therefore, the optical axis of each imaging component 20a and 20b forms an angle of 85° with the transparent cover portion 50. This angle is preferably between 84° and 87°. To reduce the focal offset in this configuration to an acceptable minimum, the thickness of the transparent cover portion in the direction of the optical axis of the respective imaging component 20a and 20b is 0.5 mm + / - 0.1 mm, that is, between 0.4 mm and 0.6 mm. Furthermore, the refractive index is approximately 1.49 when PMMA is selected as the material used for the transparent cover portion 50. To reduce the amount of scattered light entering the imaging components 20a and 20b, the distance between the transparent cover portion 50 and each imaging component 20a and 20b is less than 25 mm. The size of the transparent cover portion 30 in this embodiment is limited by the size required for imaging. Therefore, the amount of scattered light entering the imaging components can be optimized by combining the distance and size of the transparent cover portion 50.

[0055] Figure 3 It is based on Figure 1 and Figure 2 An enlarged view of the sterile cover 30 and the area of ​​the medical imaging device 10 facing the sterile cover 30. The guide member 43 is provided with a protruding length L1. However, the guide member 43 can also provide different recesses. For example, if a guide member 43 provides a larger length L1 + ΔL, and the medical imaging device 10 includes a corresponding recess, the sterile cover 30 may only be able to be attached if each guide member 43 enters its corresponding recess 12. Assuming the corresponding recesses 12 have depths L1 and L1 + ΔL respectively, the length of the protruding length L2 for engagement should be at least L1 minus the length difference ΔL, i.e., L2 min = L1 - ΔL. Therefore, the sterile cover 30 can be attached only along one attachment orientation. In other words, when the sterile cover, for example, around... Figure 3When the vertical axis is rotated 180°, the attachment portion 42 cannot engage with the attachment portion 11.

[0056] Ignoring the different lengths of the guide member 43 and the depth of the recess 12, Figure 1 In the embodiment, the protruding length L2 of the attachment portion 42 is greater than the protruding length of the guide member 43. Therefore, the ratio between L1 and L2 is less than 1, preferably between 0.41 and 0.74. Furthermore, the ratio of the cross-section A1 of the guide member 43, perpendicular to its protruding length L1 and to be received by the corresponding recess 12, to the cross-section A2 of the recess 11, perpendicular to its depth, is also less than 1, typically preferably between 0.15 and 0.9. According to... Figure 3 In one embodiment, the medical imaging device 10 includes a circuit 13 that is closed when the sterile cover 30 is attached to the medical imaging device 10 due to the engagement of the attachment portions 42, 11. In such an embodiment, the ratio of A1 to A2 should be in the range of 0.9 rather than 0.15 to ensure the closure of the circuit 13. On the other hand, a lower ratio may be less sensitive to manufacturing tolerances that could cause friction or otherwise hinder the insertion of the guide member 43 into the recess 12. To allow the lower ratio of A1 to A2 to combine with the circuit 13, the circuit may form a contact region at the bottom of the recess 12. The contact may be closed by the end surface of the guide member 43. Thus, this configuration is less sensitive to lateral tolerances but is sensitive to corresponding length tolerances. To reduce length tolerances, the end surface of the guide member and / or the bottom of the recess 11 may include resilient surface portions to compensate for potential tolerances. Considering the closing or opening of the circuit, the combination of the guide member 43 and the recess 12 can also be constructed as a mechanical switch, such as a button or actuator disposed in the corresponding recess 12, which can move along the insertion direction of the guide member 43 to close or open the circuit. Even Figure 3 The illustration shows an example where circuit 13 is closed by two guiding members 43. Circuit 13 can also be configured to be closed by at least one of the guiding members 43. The same applies in the case where the circuit needs to be disconnected.

[0057] Furthermore, the attachment portion 42 is configured such that when the medical imaging device 10 extends outward from the imaging front portion 10a at a positive convergence angle α, a gap 'a' is provided between the corresponding snap fastener 42a, which is the snap-fit ​​member of the attachment portion 42, and the imaging front portion 10a of the medical imaging device 10, which is parallel to the facing side 41 of the frame member 40. This gap is less than 4 mm. In the exemplary embodiment, the convergence angle α is 5°. Due to the gap 'a', the elastic attachment member 42 does not elastically deform when initially moving beyond the imaging front portion 10a, but rather elastically deforms during movement towards the corresponding attachment portion 11 of the medical imaging device 10. Therefore, the elastic deformation can be reduced to a minimum value required to ensure that the snap fastener 42a moves into the notch of the attachment portion 11 in the locked position due to elastic restoring force. However, considering the convergence angle α of 5° here, the gap 'a' should still be limited to reduce the protruding length L2 used for engagement.

[0058] Figure 4 This is an exemplary view of the design of the guide member 43 and the corresponding recess 12. The end surface of the guide member 43 facing the bottom surface of the recess 12 is tapered and forms a concave surface with an inclination angle β relative to a plane perpendicular to the longitudinal axis z. Preferably, the inclination angle β is between 20° and 45°, which also provides a centering function. As an alternative to the concave surface, the end surface of the guide member can be conical. However, a concave shape with a radius near the longitudinal axis z can provide manufacturing advantages. The bottom surface of the recess 12 provides a corresponding surface shape depending on the positive or negative configuration. Due to this design, this combination is particularly advantageous if the guide member 43 is intended to act as an actuator to actuate the bottom surface of the recess 12 to close or open, for example, circuit 13. Specifically, the actuator is also actuated by the guide member 43, even if such actuation occurs under bending or tilting actuation.

[0059] It should be noted that the examples given are specific embodiments and are not intended to limit the scope of protection given in the claims. In particular, a single feature of one embodiment may be combined with another embodiment, provided that such combination is not reasonably excluded. As an example, the circuit to be disconnected or closed may be provided alternatively or additionally by a sterile covering.

[0060] Figure Labels

[0061] 1. Sterile Medical Imaging System

[0062] 10 Medical Imaging Devices

[0063] 10a Imaging anterior side

[0064] 10b External Part

[0065] 11 (Attachment part of medical imaging device 10)

[0066] 12 recess

[0067] 13 Circuits

[0068] 20 imaging units

[0069] 20a Imaging Component

[0070] 20b Imaging Component

[0071] 30 Sterile Covers

[0072] 40 Frame components

[0073] 41 Facing the side

[0074] 42 (Attachment portion of sterile covering 30)

[0075] 42a buckle

[0076] 43 Guiding components

[0077] 50 Transparent Cover Part

[0078] a gap

[0079] A1 (cross section of guide member 43)

[0080] A2 (cross section of recess 12)

[0081] L1 (length of guide member 43)

[0082] L2 (attachment part 42) engagement length

[0083] z Longitudinal axis

[0084] α Convergence angle

[0085] β tilt angle

Claims

1. A sterile cover (30) for a medical imaging device (10), said sterile cover (30) comprising: A frame member (40) configured to cover the imaging front side (10a) of the medical imaging device (10), wherein the facing side (41) of the frame member (40) serves as a side intended to face the imaging front side (10a) of the medical imaging device (10), and At least one transparent cover portion (50) located within the frame member (40), the transparent cover portion (50) being arranged to allow imaging through the medical imaging device (10) at least when the frame member (40) is attached to the medical imaging device (10). The frame member (40) includes at least two attachment portions (42), which are configured to provide a shape-fitting connection with a corresponding attachment portion (11) of the medical imaging device (10). The frame member (40) further includes at least one guide member (43) protruding from the facing side (41) of the frame member (40), the at least one guide member (43) being received by a recess (12) on the imaging front side (10a) of the medical imaging device (10) in the direction in which the guide member protrudes from the facing side (41) of the frame member (40).

2. The aseptic cover (30) according to claim 1, wherein, The at least two attachment portions (42) are disposed at two opposite positions on the facing side (41) of the frame member (40).

3. The sterile covering (30) according to claim 1 or 2, wherein, The at least two attachment portions (42) are configured as resilient snap-fit ​​members, which preferably protrude from the periphery of the frame member in a direction extending from the facing side (41) of the frame member (40).

4. The aseptic cover (30) according to claim 3, wherein, The snap-fit ​​component is configured such that when the medical imaging device (10) extends outward from the imaging front side (10a) at a positive convergence angle (α), a gap (a) is provided between each snap (42a) of the snap-fit ​​component and the imaging front side (10a) of the medical imaging device (10) which is parallel to the facing side (41) of the frame member (40), and the gap (a) is preferably less than 4 mm.

5. The sterile covering according to claim 3 or 4, wherein, The ratio of the protruding length (L1) of the at least one guide member (43) to the engaging protruding length (L2) of the snap-fit ​​member is less than 1, preferably between 0.41 and 0.74, wherein the engaging protruding length (L2) of the snap-fit ​​member protrudes from the facing side (41) of the frame member (40) to the corresponding end of the snap (42a) opposite to the facing side.

6. The aseptic cover (30) according to claim 5, wherein, The ratio of the cross section (A1) of the at least one guiding member (43) perpendicular to the protruding length (L1) to the corresponding cross section (A2) of the recess (12) on the imaging front side (10a) of the medical imaging device (10) is less than 1, preferably between 0.15 and 0.

9.

7. The sterile covering (30) according to any one of the preceding claims, wherein, The at least two attachment portions (42) of the frame member (40) and / or at least one of the at least one guide member (43) are configured to disconnect or close the circuit (13) of the medical imaging device (10), preferably configured to function as a limit switch or to establish an electrical contact.

8. The sterile covering according to any one of the preceding claims, wherein, The transparent cover portion (50) has a refractive index of approximately 1.49 and / or a thickness of 0.4 mm to 0.6 mm in the imaging direction.

9. A sterile medical imaging system (1), comprising: Medical imaging device (10), and The sterile covering (30) according to any one of claims 1 to 6, The outer portion (10b) of the medical imaging device (10) extends outward from the imaging front portion (10a) of the medical imaging device (10) at a positive convergence angle (α), and The external portion (10b) of the medical imaging device (10) extending outward from the imaging front side (10a) of the medical imaging device (10) includes at least two attachment portions (11) corresponding to the attachment portion (42) of the sterile cover (30), and the at least two attachment portions (11) are preferably recessed into the external portion (10b).

10. The sterile medical imaging system (1) according to claim 9, wherein, The positive convergence angle (α) is equal to or less than 15°.

11. The sterile medical imaging system (1) according to claim 9 or 10, wherein, The surface of the transparent cover portion (50) facing at least one imaging component (20a, 20b) forms an angle of approximately 84° to 87° with the optical axis of the at least one imaging component (20a, 20b), wherein the distance between the surface of the transparent cover portion (50) and the surface of the imaging component (20a, 20b) facing the transparent cover portion (50) is preferably equal to or less than 25 mm.

12. The sterile medical imaging system (1) according to any one of claims 9 to 11, wherein, The at least two attachment portions (42) of the sterile cover (30) are respectively configured with the at least two attachment portions (11) of the medical imaging device (10) and / or the guide member (43) of the sterile cover (30) to provide only one attachment orientation.

13. The sterile medical imaging system (1) according to any one of claims 9 to 12, wherein, The medical imaging device (10) includes a circuit (13) that can be closed by at least one of the at least two attachment portions (42) of the sterile cover (30) and / or at least one of the at least one guide member (43) of the sterile cover (30).

14. The sterile medical imaging system (1) according to any one of claims 9 to 13, wherein, The medical imaging device (10) is a microscope.

Images