Micro protection bag

Abstract

Provided is a micro-protection bag that makes it easier to assemble a surgical microscope. The micro-protection bag includes: a lens cover unit which can be attached to and detached from a housing of an objective lens of a surgical microscope; a protective lens for protecting the objective lens; and a protective bag body covering the operating microscope. The mirror cover unit includes: a cylinder having an inner diameter larger than the cylindrical shape of the housing; a plurality of protrusions protruding radially inward from the inner peripheral surface of the cylinder body at spaced positions in the circumferential direction of the cylinder body; and a pressing member that, among the protrusions, presses a protrusion that is supported so as to be retractable in the cylinder in a direction protruding from the inner peripheral surface of the cylinder. The protective mirror is supported at the tip of the cylindrical body in a state inclined with respect to the optical axis of the objective lens.

Description

Technical Field

[0001] The invention relates to a micro-protection bag for covering an operating microscope. Background Art

[0002] In neurosurgery, otolaryngology, plastic surgery, or ophthalmology, surgical microscopes are used to expand the surgical field of view while performing surgery. Surgery must be performed in a clean manner. Since it is difficult to sterilize the surgical microscope itself, a disposable micro-protective bag is used to cover the surgical microscope during each surgery to ensure a clean field of view as a normal operation (for example, refer to patent documents 1 to 4).

[0003] A general micro-protective bag is composed of a lens cover unit that is mounted on and removed from an objective lens of a surgical microscope, and a bag-shaped protective bag body that is assembled to the lens cover unit and covers the surgical microscope. In addition, Patent Document 5 discloses various variations of the lens cover unit that can be mounted on objective lenses of different diameters, and a structure that changes the angle of the protective lens with respect to the optical axis in order to prevent reflection or glare of incident light of the surgical microscope.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2012-183449

[0007] Patent Document 2: Japanese Patent Application Publication No. 2014-161504

[0008] Patent Document 3: Japanese Patent Application No. 2010-512851

[0009] Patent Document 4: Japanese Patent Application Publication No. 2017-107210

[0010] Patent Document 5: International Publication No. 2022 / 003806 Summary of the invention

[0011] [Problems to be Solved by the Invention]

[0012] However, the micro-protection bag of Patent Document 5 has a problem that the operation of assembling the lens cover unit to the objective lens is complicated (for example, the assembly procedure is greatly different from that of a general micro-protection bag, and the assembly operation requires a large force, etc.).

[0013] In order to solve the above-mentioned prior art problems, the present invention aims to provide a micro-protection bag that simplifies the assembly work of a surgical microscope.

[0014] [Means for solving the problem]

[0015] In order to solve the above-mentioned problems, the present invention has the following features. A micro-protection bag comprises: a lens cover unit that can be loaded and unloaded on the housing of the objective lens of a surgical microscope; a protective lens that protects the aforementioned objective lens; and a protective bag body that covers the aforementioned surgical microscope; wherein the aforementioned lens cover unit comprises: a cylindrical body with an inner diameter larger than the cylindrical shape of the aforementioned housing; a plurality of protrusions that protrude from the inner circumferential surface of the aforementioned cylindrical body to the inner side in the radial direction at intervals in the circumferential direction of the aforementioned cylindrical body; and a pressure member, wherein among the protrusions, the aforementioned protrusion that is supported and retractable on the aforementioned cylindrical body applies pressure in the direction protruding from the inner circumferential surface of the aforementioned cylindrical body; the aforementioned protective lens is supported at the front end of the aforementioned cylindrical body in a state that is inclined relative to the optical axis of the aforementioned objective lens.

[0016] [Effects of the invention]

[0017] The present invention can provide a micro-protection bag which simplifies the assembly operation of a surgical microscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main parts of the surgical microscope and the micro-protection bag.

[0019] Figure 2A This is an oblique view of the micro-protection bag of the first embodiment viewed from obliquely above.

[0020] Figure 2B This is an oblique view of the micro-protection bag of the first embodiment viewed from obliquely below.

[0021] Figure 3A It is a longitudinal cross-sectional view of the micro-protection bag of the first embodiment.

[0022] Figure 3B This is a plan view of a micro-protection bag according to a first embodiment.

[0023] Figure 4A It is a longitudinal cross-sectional view showing a state before the mirror cover unit of the first embodiment is assembled to the housing.

[0024] Figure 4B It is a longitudinal cross-sectional view showing a state where the mirror cover unit of the first embodiment is assembled to the housing in the middle.

[0025] Figure 4C It is a longitudinal cross-sectional view showing a state where the mirror cover unit according to the first embodiment is assembled to a housing.

[0026] Figure 5A It is a plan view showing a state before the mirror cover unit of the first embodiment is assembled to the housing.

[0027] Figure 5B It is a plan view showing a state where the mirror cover unit according to the first embodiment is assembled to a housing.

[0028] Figure 6 It is an exploded perspective view of the mirror cover unit of the second embodiment viewed from obliquely above.

[0029] Figure 7 It is an exploded perspective view of the mirror cover unit of the second embodiment as viewed obliquely from below.

[0030] Fig. 8A This is an assembly perspective view of the mirror cover unit of the second embodiment viewed from obliquely above.

[0031] Figure 8B This is an assembly perspective view of the mirror cover unit of the second embodiment as viewed obliquely from below.

[0032] Fig. 9A It is a longitudinal cross-sectional view showing a state before the mirror cover unit of the second embodiment is assembled to the housing.

[0033] Fig. 9B It is a longitudinal cross-sectional view showing a state where the mirror cover unit according to the second embodiment is assembled to a housing.

[0034] Fig. 10A It is a plan view showing a state before the mirror cover unit of the second embodiment is assembled to the housing.

[0035] Fig. 10B It is a plan view showing a state where the mirror cover unit according to the second embodiment is assembled to a housing.

[0036] Wherein, the reference numerals are:

[0037] 1: Surgical microscope

[0038] 2, 3, 4, 5: Arm

[0039] 6: Objective lens

[0040] 7: Eyepiece

[0041] 8: Shell

[0042] 10: Micro protective bag

[0043] 20: Protective bag body

[0044] 21, 37a, 46a, 47a, 47b, 47c: through holes

[0045] 30, 40: Mirror cover unit

[0046] 31, 41: Cover body

[0047] 32, 33, 34, 42, 43, 44: protrusion

[0048] 35: Coil spring

[0049] 36, 52: Protective mirror

[0050] 37, 47: cylinder

[0051] 38, 48: Accommodation portion

[0052] 45: Elastomer

[0053] 46:Substrate

[0054] 47d: abutment ring

[0055] 47e: Gap

[0056] 47f: groove

[0057] 48a: Pin

[0058] 50: Protective mirror unit

[0059] 51: Ring

[0060] 53: Cover part

[0061] 54: convex strip DETAILED DESCRIPTION

[0062] Hereinafter, the micro-protection bag 10 of the embodiment will be described according to the drawings. The embodiment of the present invention described below is an example of the embodiment of the present invention, and the scope of the present invention is not limited to the scope of the embodiment. Therefore, the present invention can be implemented by adding various changes to the embodiment.

[0063] Figure 1 FIG. 1 is a schematic diagram of the main parts of the surgical microscope 1 and the micro-protection bag 10. Figure 1 As shown, the surgical microscope 1 mainly includes a plurality of arms 2, 3, 4, 5 rotatably connected to each other, and an objective lens 6 and an eyepiece 7 assembled at the front end of the arm 5. Then, the objective lens 6 can be arranged at a position facing the surgical field through the relative rotation of the joint parts of the arms 2 to 5. Then, the doctor (operator) can observe the expanded surgical field through the eyepiece 7.

[0064] The objective lens 6 is a convex lens. Next, the objective lens 6 is assembled inside the cylindrical housing 8. In other words, Figure 1 The optical axis L0 of the objective lens 6 indicated by a dotted line coincides with the axial direction of the housing 8 .

[0065] Furthermore, the surgical microscope 1 is equipped with an illumination device (e.g., LED (light emitting diode), xenon lamp). The light emitted from the illumination device is transmitted through the optical system (lens, mirror, etc.) contained in the arms 2 to 5, passes through the objective lens 6, and is irradiated toward the surgical field. The light is reflected from the surgical field and incident on the objective lens 6 again, so that the doctor can observe the surgical field. The irradiation direction of the light from the illumination device is, for example, inclined by 3 to 6 degrees relative to the optical axis L0. o degree.

[0066] All instruments that come into contact with or are likely to come into contact with the surgical site during surgery must be sterilized. However, it is difficult to sterilize the surgical microscope 1 itself, so the surgical microscope 1 is wrapped in a disposable micro-protection bag 10 for each surgery. The micro-protection bag 10 is packaged in a sterilized state and is unpacked in the operating room to cover the surgical microscope 1.

[0067] [First Implementation Aspect]

[0068] like Figure 1 As shown, the micro protection bag 10 of the first embodiment mainly includes a protection bag body 20 and a lens cover unit 30 .

[0069] The protective bag body 20 is a sheet-like component formed of a transparent or translucent material (e.g., polyethylene). The protective bag body 20 can be in various known shapes as long as it can cover the main part of the surgical microscope 1. As an example, the protective bag body 20 may be a simple sheet or bag. As another example, the protective bag body 20 may include a first protective bag and a second protective bag in the form of a long strip, as shown in Japanese Patent No. 6749532. Furthermore, as another example, the protective bag body 20 may include a bag-like portion and a strip-like portion, as shown in Japanese Patent No. 7122054.

[0070] The lens cover unit 30 is assembled to the protective bag body 20. Specifically, the micro protective bag 10 is integrated by welding the lens cover unit 30 to the peripheral edge of the through hole 21 that penetrates the protective bag body 20 in the thickness direction. The lens cover unit 30 is assembled to the housing 8. Furthermore, the lens cover unit 30 prevents reflection or glare of incident light of the surgical microscope 1.

[0071] [Configuration of the mirror cover unit 30]

[0072] Figure 2A This is a perspective view of the micro-protection bag 10 of the first embodiment viewed from obliquely above. Figure 2B This is a perspective view of the micro-protection bag 10 of the first embodiment as viewed from obliquely below. Figure 3A It is a longitudinal cross-sectional view of the micro-protection bag 10 according to the first embodiment. Figure 3B FIG. 1 is a plan view of a micro-protection bag 10 according to a first embodiment.

[0073] like Figure 2A to Figure 3B As shown, the mirror cover unit 30 mainly includes a cover body 31 , a plurality of (three in the present embodiment) protrusions 32 , 33 , and 34 , a coil spring 35 (an example of a pressing member), and a protective mirror 36 .

[0074] The cover body 31 supports the protrusions 32 to 34, the coil spring 35, and the protective mirror 36, and is assembled to the housing 8. The cover body 31 is formed of, for example, resin (for example, polypropylene). The cover body 31 is formed with, for example, a cylindrical body 37 and a receiving portion 38 in one piece.

[0075] The cylinder 37 is cylindrical in shape with both ends in the axial direction open. The inner diameter of the cylinder 37 is set larger than the outer dimensions of various housings 8 in which the mirror cover unit 30 is assumed to be mounted. The outer peripheral surface of the cylinder 37 is welded to the peripheral edge of the through hole 21 of the protective bag body 20. Figure 3A As shown in FIG. 1 , the cylinder 37 of the first embodiment has different lengths in the axial direction in the circumferential direction of the cylinder 37. More specifically, the end portion ( Figure 3A For Figure 3A The axial direction of the cylinder 37 indicated by the dotted line is perpendicular to the axial direction of the cylinder 37. On the other hand, the end portion ( Figure 3A The lower end) is inclined with respect to the axial direction of the cylinder 37.

[0076] The accommodating portion 38 is a portion protruding from the outer peripheral surface of the cylinder 37 in a portion of the circumferential direction of the cylinder 37. The accommodating portion 38 of the first embodiment is formed in the portion with the longest length in the axial direction in the circumferential direction of the cylinder 37. The accommodating portion 38 has an internal space for accommodating the coil spring 35. Then, a through hole 37a is formed in the cylinder 37, which penetrates the cylinder 37 in the thickness direction. Then, the internal space of the cylinder 37 and the internal space of the accommodating portion 38 are connected through the through hole 37a.

[0077] The protrusions 32 to 34 are formed of, for example, resin (polyurethane). Furthermore, the protrusions 32 to 34 are arranged at intervals in the circumferential direction of the cylinder 37. Furthermore, the protrusions 32 to 34 protrude from the inner circumferential surface of the cylinder 37 to the inner side in the radial direction. Furthermore, among the protrusions 32 to 34, one protrusion 32 is a "movable protrusion 32", and the remaining two protrusions 33, 34 are "fixed protrusions 33, 34". The number of protrusions 32 to 34 is not limited to three, and more than two may be sufficient. Furthermore, the number of movable protrusions 32 is not limited to one, and more than one may be sufficient. In other words, all of the protrusions 32 to 34 may be movable protrusions 32 to 34.

[0078] The movable protrusion 32 is arranged at the position of the through hole 37a. In addition, the movable protrusion 32 is supported to be retractable (protruding and retracting) in the cylinder 37. In addition, "the movable protrusion 32 is retracted in the cylinder 37" does not require that even the front end of the movable protrusion 32 is completely retracted into the cylinder 37. The movable protrusion 32 can be reduced in the state of being most protruding from the cylinder 37. Furthermore, the movable protrusion 32 is pressed in the direction of protruding from the inner peripheral surface of the cylinder 37 via the coil spring 35. Next, when the movable protrusion 32 is most protruding, the protrusions 32 to 34 from the inner peripheral surface of the cylinder 37 can also be the same.

[0079] The fixed protrusions 33 and 34 are fixed in a state of protruding from the inner circumferential surface of the cylinder 37 to the inner side in the radial direction. In addition, in the circumferential direction of the cylinder 37, the interval L1 between the movable protrusion 32 and the fixed protrusion 33 is the same as the interval L1 between the movable protrusion 32 and the fixed protrusion 34. On the other hand, in the circumferential direction of the cylinder 37, the interval L2 between the fixed protrusions 33 and 34 is narrower than the interval L1 between the movable protrusion 32 and the fixed protrusions 33 and 34. However, the intervals between the three protrusions 32 to 34 may be the same (120 in the case of the first embodiment). o ).

[0080] The protective mirror 36 is a flat plate-shaped lens formed by a light-transmitting material (e.g., glass, polycarbonate, etc.). However, the shape of the protective mirror 36 is not limited to a flat plate shape, and a curved lens with a convex protuberance is also acceptable. The protective mirror 36 is fixed to the end of the other side of the axial direction of the barrel 37 (the end of the side inclined to the axial direction of the barrel 37). Then, the protective mirror 36 is supported on the front end of the barrel 37 in a state inclined to the optical axis L0 of the objective lens 6. In other words, of the two ends of the axial direction of the barrel 37, the end of one side is open, and the end of the other side is closed via the protective mirror 36.

[0081] The protective mirror 36 protects the objective lens 6 of the surgical microscope 1. Specifically, when the lens cover unit 30 is mounted on the housing 8, the protective mirror 36 faces the objective lens 6 on the optical axis L0 of the objective lens 6. Then, the external light passing through the protective mirror 36 is incident on the objective lens 6. In addition, the protective mirror 36 prevents reflection or glare of the incident light of the surgical microscope 1 by being tilted with respect to the optical axis L0.

[0082] [Assembling Method of Mirror Cover Unit 30]

[0083] Fig. 4 is a longitudinal cross-sectional view showing the state before (A), during (B), and after (C) the mirror cover unit 30 of the first embodiment is assembled to the housing 8. Fig. 5 is a plan view showing the state before (A), and after (B) the mirror cover unit 30 of the first embodiment is assembled to the housing 8.

[0084] First, if Figure 4AAs shown in FIG. 1 , the mirror cover unit 30 is arranged below the housing 8 in such a manner that the end of the open side of the cylinder 37 faces the lower surface of the housing 8 (in other words, the end of the open side of the cylinder 37 is facing upward). Figure 4A and Figure 5A As shown, the movable protrusion 32 is in the most protruding state.

[0085] Then, if Figure 4B As shown, the cylinder 37 is tilted so that the side where the movable protrusion 32 is provided is upward, and the side surface of the housing 8 presses against the movable protrusion 32, resisting the force of the coil spring 35 to retract the movable protrusion 32 into the cylinder 37 (in other words, reducing the protrusion amount of the movable protrusion 32). On the other hand, at this point in time, the fixed protrusions 33 and 34 do not contact the side surface of the housing 8.

[0086] Then, if Figure 4C As shown in FIG. 1 , the movable protrusion 32 is maintained in the retracted state, and the inclination of the cylinder 37 is restored to the original state. In this way, the cylinder 37 is covered with the housing 8. Then, by reducing the force in the direction of retracting the movable protrusion 32, the protrusion amount of the movable protrusion 32 increases, and the front ends of the fixed protrusions 33 and 34 contact the side surface of the housing 8. In this way, the mirror cover unit 30 is attached to the housing 8. At this time, the protrusion amount of the movable protrusion 32 corresponds to the change in the diameter of the housing 8.

[0087] Here, an imaginary circle ( Figure 5A ), and an imaginary circle connecting the front ends of the protrusions 32 to 34 when the protrusion amount of the movable protrusion 32 is reduced ( Figure 5B The two-dot dashed line of FIG. 1 shows a sliding movement of only the protruding portion of the movable protrusion 32. Figure 5B The diameter D2 of the imaginary circle represented by the two-point dashed line is greater than Figure 5A In other words, by changing the protrusion amount of the movable protrusion 32, the diameter of the imaginary circle connecting the tips of the protrusions 32 to 34 (ie, the diameter of the housing 8) changes.

[0088] Next, although not shown in the figure, the protective bag body 20 is covered and fixed on the surgical microscope 1. In this way, the surgical microscope 1 can be kept in a clean state.

[0089] [Effects and effects of the first embodiment]

[0090] Through the first implementation, Figure 4A to Figure 5BAs shown in the figure, the movable protrusion 32 is pressed by the side of the housing 8 and retracted into the cylinder 37, and the mirror cover unit 30 can be assembled to the housing 8 by covering the housing 8 with the cylinder 37. In this way, the assembly operation to the surgical microscope 1 is simplified compared with the various mirror cover units exemplified in Patent Document 5. In addition, since the various mirror cover units exemplified in Patent Document 5 do not require large elastic deformation when assembled to the surgical microscope 1, the force required for assembly can be reduced.

[0091] Furthermore, according to the above-mentioned embodiment, by setting the number of protrusions 32 to 34 to three, the mirror cover unit 30 can be stably assembled to the housing 8 compared to the case of two protrusions. Furthermore, by setting the number of protrusions 32 to 34 to the minimum of three, the structure of the mirror cover unit 30 can be simplified.

[0092] Furthermore, through the above-mentioned embodiment, by making the interval L2 between the fixed protrusions 33 and 34 narrower than the interval L1 between the movable protrusion 32 and the fixed protrusions 33 and 34 , the movable protrusion 32 and the fixed protrusions 33 and 34 can stably clamp the housing 8 .

[0093] Furthermore, by assembling the protective mirror 36 at the front end of the barrel 37 in a state inclined with respect to the optical axis L0 of the objective lens 6, reflection or glare of incident light of the surgical microscope 1 can be prevented. As a result, the operator who is looking at the surgical microscope 1 can be prevented from being hindered in the operation due to reflection or glare.

[0094] [Second Implementation Aspect]

[0095] Figure 6 It is an exploded perspective view of the mirror cover unit 40 according to the second embodiment viewed from obliquely above. Figure 7 FIG. 8 is an exploded perspective view of the mirror cover unit 40 of the second embodiment as viewed from obliquely below. FIG. 9 is a longitudinal sectional view of the mirror cover unit 40 of the second embodiment. FIG. 10 is a plan view of the mirror cover unit 40 of the second embodiment. The detailed description of the common points with the first embodiment will not be repeated, and the description will focus on the differences. In addition, in the first and second embodiments, the components with the same basic functions are named the same.

[0096] like Figure 6 to Figure 10B As shown, the mirror cover unit 40 of the second embodiment mainly includes a cover body 41 , a plurality of (three in this embodiment) protrusions 42 , 43 , 44 , an elastic body 42 (an example of a pressure member), and a protective mirror unit 50 .

[0097] The cover body 41 is a resin (e.g., polypropylene) member formed integrally of a base plate 46, a cylinder 47, and a receiving portion 48. The base plate 46 is a flat plate-shaped portion. The peripheral edge of the through hole 21 of the protective bag body 20 is welded to the base plate 46. A through hole 46a is formed in the base plate 46 in the thickness direction. The cylinder 47 protrudes from the lower surface of the base plate 46 in a manner surrounding the through hole 46a. The receiving portion 48 is formed on the lower surface of the base plate 46 in a manner extending from the outer peripheral surface of the cylinder 47.

[0098] The cylinder 47 of the second embodiment is different from the cylinder 37 of the first embodiment in the following points. First, the end of the cylinder 47 on the other side in the axial direction is orthogonal to the axial direction of the cylinder 47. In addition, the cylinder 47 is formed with through holes 47a, 47b, 47c, an abutment ring 47a (abutment portion), a notch 47e, and a groove 47f.

[0099] The through holes 47a to 47c are arranged at intervals in the circumferential direction of the cylinder 47, and penetrate the thickness direction of the cylinder 47. In addition, the through holes 47a to 47c are arranged on the substrate 46 side relative to the abutment ring 47d in the axial direction of the cylinder 47. Next, the protrusions 42 to 44 described below are inserted into the through holes 47a to 47c. In other words, the through hole 47a makes the internal space of the cylinder 47 and the internal space of the accommodating portion 48 communicate. The positions of the through holes 47b and 47c are the same as the layout of the protrusions 32 to 34 described in the first embodiment.

[0100] The abutment ring 47d protrudes radially inward from the inner circumferential surface of the cylinder 47. In addition, the abutment ring 47d of the present embodiment is continuous in the circumferential direction. However, the abutment ring 47d may be provided only on a portion of the circumferential direction of the inner circumferential surface of the cylinder 47. Next, the abutment ring 47d controls the insertion amount of the shell 8 relative to the cylinder 47 by abutting against the front end of the shell 8 inserted into the cylinder 47 from the substrate 46 side.

[0101] The notch 47e is provided at a portion of the circumferential direction of the cylinder 47 (the position where the accommodation portion 48 is provided) in the end portion on the other side of the axial direction of the cylinder 47 (the side opposite to the base plate 46). In other words, the notch 47e is provided on the side opposite to the base plate 46 with the contact ring 47d interposed therebetween. The notch 47e is a space through which the cover portion 53 of the protective mirror unit 50 passes.

[0102] The groove 47f is provided on the inner peripheral surface of the cylinder 47 on the side opposite to the substrate 46 where the contact ring 47d is sandwiched. The groove 47f is continuous in the circumferential direction of the cylinder 47. However, the groove 47f is interrupted at the position of the notch 47e. Then, the groove 47f receives the convex strip 54 provided on the ring portion of the protective mirror unit 50, thereby fixing the protective mirror unit 50 to the cover body 41.

[0103] The accommodation portion 48 is a frame-shaped portion that defines a space for accommodating the elastic body 45. One end of the accommodation portion 48 in the axial direction is closed via the base plate 46. On the other hand, the other end of the accommodation portion 48 in the axial direction is configured to be openable and closable via the cover portion 53 of the protective mirror unit 50. Furthermore, a pin 48a protruding from the lower surface of the base plate 46 is formed inside the accommodation portion 48.

[0104] The basic structure and role of the protrusions 42 to 44 of the second embodiment are the same as those of the protrusions 32 to 34 of the first embodiment. In addition, the protrusion 42 is a "movable protrusion 42", and the protrusions 43 and 44 are "fixed protrusions 43 and 44". Fig. 9A As shown, the protrusion 42 is composed of a neck portion 42a, a head portion 42b, and a contact portion 42c. Since the structures of the protrusions 43 and 44 are also common, the protrusion 42 is described in detail below.

[0105] The neck portion 42a is a portion through which the connection portion 45a of the elastic body 45 passes. The head portion 42b is formed at one end of the neck portion 42a. Moreover, the head portion 42b is larger than the opening area of ​​the connection portion 45a. Furthermore, the head portion 42b has a thinner front end shape that becomes thinner toward the front end. The abutment portion 42c is formed at the other end of the neck portion 42a. Moreover, the abutment portion 42c is larger than the opening area of ​​the connection portion 45a. Furthermore, the abutment portion 42c is a portion that abuts against the outer peripheral surface of the housing 8.

[0106] When the head 42b is pressed into the connecting portion 45a from the inner peripheral surface side of the cylinder 47, the head 42b with a thinner front end is elastically compressed and passes through the connecting portion 45a. Fig. 9A As shown, the neck 42a is located in the connecting portion 45a, and the contact portion 42c protrudes from the inner side of the cylinder 47. Similarly, when the heads 43b and 44b are pressed into the through holes 47b and 47c from the inner circumferential surface side of the cylinder 47, the heads 43b and 44b with thinner front ends are elastically compressed and pass through the through holes 47b and 47c. Then, the necks 43a and 44a are located in the through holes 47b and 47c, the heads 43b and 44b are located outside the cylinder 47, and the contact portions 43c and 44c are located inside the cylinder 47.

[0107] The elastic body 45 is another example of a pressing member that presses the movable protrusion 42 from the inner circumferential surface of the cylinder 47 in the protruding direction. In other words, the pressing member is not limited to the coil spring 35 of the first embodiment, and can be in various shapes. Figure 6 and Figure 7 As shown, the elastic body 45 is a member made of resin (for example, polyacetal) in which, for example, a connecting portion 45a, a fixing portion 45b, and a pair of leaf springs 45c and 45d are integrally molded.

[0108] The connecting portion 45a is a portion having an opening of the head portion 42b of the connecting protrusion 42. The fixing portion 45b is a portion that fixes the elastic body 45 in the accommodating portion 48 by receiving the pin 48a. The leaf springs 45c and 45d are elastically compressed portions that are connected to the connecting portion 45a at one end and to the fixing portion 45b at the other end. Next, by assembling the movable protrusion 42 with the connecting portion 45a, the pin 48a is inserted into the fixing portion 45b, as shown in FIG. Fig. 8A and Fig. 10A As shown, the movable protrusion 42 protrudes radially inward from the inner peripheral surface of the cylinder 47 .

[0109] The protective mirror unit 50 is a member for fixing the protective mirror 52 to the cover body 41 in a tilted state with respect to the optical axis L0. Figure 6 and Figure 7 As shown, the protective mirror unit 50 is a member made of resin (for example, polycarbonate) in which, for example, a ring portion 51 , a protective mirror 52 , and a cover portion 53 are integrally molded.

[0110] The ring portion 51 has a roughly cylindrical shape. The ring portion 51 is a portion inserted into the cylinder 47. In other words, the outer diameter of the ring portion 51 is set to be the same as or slightly smaller than the inner diameter of the cylinder 47. In addition, a ridge 54 is formed on the outer peripheral surface of the ring portion 51. The ridge 54 protrudes outward in the radial direction from the outer peripheral surface of the ring portion 51 and extends in the circumferential direction of the ring portion 51. Then, when the ring portion 51 is inserted into the cylinder 47, the ridge 54 enters the groove 47f, and the protective mirror unit 50 is fixed to the cover body 41. However, the method of fixing the protective mirror unit 50 to the cover body 41 is not limited to this, and it may be connected by bonding, welding, bolts, or a combination of these.

[0111] The basic structure and role of the protective mirror 52 of the second embodiment are the same as those of the protective mirror 36 of the first embodiment. The protective mirror 52 is located inside the ring portion 51. Specifically, when the protective mirror unit 50 is fixed to the cover body 41, the protective mirror 52 is arranged inside the ring portion 51 in a manner inclined with respect to the optical axis L0.

[0112] The cover 53 is a portion protruding radially outward from a portion of the circumferential direction of the ring 51. When the ring 51 is inserted into the cylinder 47, the cover 53 closes the accommodating portion 48. This prevents the elastic body 45 from falling off.

[0113] The second embodiment can also achieve the same effects as the first embodiment. In addition, in the second embodiment, if the barrel 47 is covered on the housing 8 until the front end of the housing 8 abuts against the abutment ring 47d, the objective lens 6 and the protective lens 52 are still set at an appropriate distance. As a result, the assembly operation of the micro-protection bag 10 for the surgical microscope 1 becomes easier.

Claims

1. A micro-protection bag, characterized in that: Include: A lens cover unit, which can be mounted and removed from the housing of the objective lens of the surgical microscope; a protective lens to protect the objective lens; and The protective bag body covers the aforementioned surgical microscope. Wherein, the aforementioned mirror cover unit comprises: A cylinder body, the inner diameter of which is larger than the cylindrical shape of the aforementioned shell; A plurality of protrusions are provided at intervals in the circumferential direction of the cylinder, and protrude from the inner circumferential surface of the cylinder to the inner side in the radial direction; and The pressing member applies pressure to the protrusion supported and retractable on the cylinder in a direction protruding from the inner peripheral surface of the cylinder, The protective lens is supported at the front end of the cylindrical body in a state of being inclined with respect to the optical axis of the objective lens.

2. The micro-protection bag as claimed in claim 1, wherein the protrusions are arranged at three positions spaced apart in the circumferential direction of the cylinder.

3. The micro-protection bag as claimed in claim 2, wherein the three aforementioned protrusions comprise: A movable protrusion supported and retractable on the aforementioned cylinder; and The two fixing protrusions are fixed in a state of protruding from the inner peripheral surface of the aforementioned cylinder. In the circumferential direction of the cylindrical body, the interval between the two fixed protrusions is narrower than the interval between the movable protrusion and the fixed protrusion.

4. The micro-protection bag as claimed in claim 1, wherein the lens cover unit comprises a cover body which is integrally formed by the cylinder and a receiving portion extending from the outer peripheral surface of the cylinder and receiving the pressure member. The cylinder is formed with a through hole communicating with the accommodation portion. The aforementioned micro-protection bag further comprises: A protective mirror unit fixes the protective mirror to the cover body in a state where the protective mirror is tilted relative to the optical axis. The protective mirror unit is integrally formed by a ring portion inserted into the cylinder, the protective mirror located inside the ring portion, and a cover portion that closes the accommodating portion when the ring portion is inserted into the cylinder.

5. The micro-protection bag as claimed in claim 4, wherein the inner circumferential surface of the cylinder is formed with a groove extending in the circumferential direction. The outer peripheral surface of the ring portion is formed with convex strips extending in the circumferential direction and entering the concave grooves.

6. The micro-protection bag as claimed in claim 4, wherein the cover body is formed of polypropylene. The protective mirror unit is formed of polycarbonate.

7. The micro-protection bag according to claim 1, wherein the mirror cover unit includes a contact portion which protrudes from the inner peripheral surface of the cylinder to the inside in the radial direction and contacts the front end of the housing.

Images