Microshield bag

Abstract

A micro-protective bag is provided that can properly hold the objective lens while suppressing an increase in the number of parts. It includes: a lens cap unit that is detachable from the objective lens housing of a surgical microscope, and a protective bag body for covering the surgical microscope. The lens cap unit includes: a cap body that is cylindrical in shape with an inner diameter larger than the housing, and has a first slit in a portion of its circumferential direction; and a protective lens for protecting the objective lens. The cap body includes bulges that connect to both ends of the first slit and bulge inwards radially from the cap body, and are elastically deformable outwards radially.

Description

Technical Field

[0001] This invention relates to a microprotective bag for covering a surgical microscope. Background Technology

[0002] In neurosurgery, otolaryngology, plastic surgery, or ophthalmology, surgery is sometimes performed while using a surgical microscope to expand the surgical field. Surgery must be performed under clean operating conditions, but because surgical microscopes themselves are difficult to sterilize, they are typically covered with a disposable microprotective bag after each surgery to ensure a clean field of view (e.g., see Patent Documents 1-6).

[0003] A typical micro-protective bag consists of a lens cap unit that can be attached to the objective lens of a surgical microscope, and a bag-shaped protective bag body that is mounted on the lens cap unit and covers the surgical microscope. Furthermore, Patent Document 6 discloses a structure that holds the objective lens by means of multiple protrusions extending from the inner surface of the tube.

[0004] (Patent Documents) (Patent Document 1) Japanese Patent Application Publication No. 2012-183449; (Patent Document 2) Japanese Patent Application Publication No. 2014-161504; (Patent Document 3) Japanese Patent Application Publication No. 2010-512851; (Patent Document 4) Japanese Patent Application Publication No. 2017-107210; (Patent Document 5) International Publication No. 022 / 003806; (Patent Document 6) International Publication No. 025 / 099931. Summary of the Invention

[0005] (Problems to be solved by the invention) However, the structure in Patent Document 6 requires a mechanism for extending and retracting a portion of the protrusion, resulting in a large number of parts. Furthermore, since the protrusion only contacts the objective lens point, there is also the problem of weak holding force.

[0006] The present invention was made in view of the above-mentioned reasons, and its object is to provide a micro-protective bag that can properly hold the objective lens while suppressing the increase in the number of parts.

[0007] (Means for Solving the Problem) In order to solve the aforementioned problem, the present invention provides a micro protective bag, comprising: a lens cap unit, which is detachable from the housing of an objective lens of a surgical microscope, and a protective bag body for covering the surgical microscope; the lens cap unit comprises: a cap body, which is a cylindrical shape with an inner diameter larger than that of the housing, and has a first slit in a portion in the circumferential direction; and a protective lens for protecting the objective lens; wherein the cap body includes a bulge that is connected to both ends of the first slit and bulges inward in the radial direction of the cap body, and can elastically deform outward in the radial direction.

[0008] (Effects of the Invention) According to the present invention, a micro-protective bag can be obtained that can properly hold the objective lens while suppressing the increase in the number of parts. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the main components of the surgical microscope and the microprotective bag.

[0010] Figure 2A This is an oblique view of the lens cover unit related to the first embodiment, viewed from an oblique top.

[0011] Figure 2B This is a perspective view of the lens cover unit related to the first embodiment, viewed from a slightly lower angle.

[0012] Figure 3 This is an exploded perspective view of the lens cap unit related to the first embodiment.

[0013] Figure 4A This diagram shows the state in which the protective lens is rotated to one side in the lens cover unit associated with the first embodiment.

[0014] Figure 4B This diagram shows the state in which the protective lens is rotated to the other side in the lens cover unit associated with the first embodiment.

[0015] Figure 5 This is a plan view showing the state in which the lens cap unit related to the first embodiment is installed in front of the housing.

[0016] Figure 6 This is a plan view showing the state after the lens cap unit related to the first embodiment is installed in the small-diameter housing.

[0017] Figure 7 This is a plan view showing the state after the lens cap unit related to the first embodiment is installed in the large-diameter housing.

[0018] Figure 8A This is an oblique view of the lens cover unit related to the second embodiment, viewed from an oblique top.

[0019] Figure 8B This is a perspective view of the lens cover unit related to the second embodiment, viewed from a slightly lower angle.

[0020] Figure 9 This is an exploded perspective view of the lens cap unit related to the second embodiment.

[0021] Figure 10A This diagram shows the state in which the protective lens is rotated to one side in the lens cover unit related to the second embodiment.

[0022] Figure 10BThis diagram shows the state in which the protective lens is rotated to the other side in the lens cover unit related to the second embodiment.

[0023] In the attached figures, the following labels are used:

[0024] 1: Surgical microscope

[0025] 2: Arm

[0026] 3: Arms

[0027] 4: Arms

[0028] 5: Arms

[0029] 6: Objective lens

[0030] 7: Eyepiece

[0031] 8: Shell

[0032] 10: Micro Protective Bag

[0033] 20: Protective bag body

[0034] 21: Through hole

[0035] 30: Lens Cap Unit

[0036] 30A: Lens Cap Unit

[0037] 31: Cover body

[0038] 32: Protective mirror

[0039] 33: Cylinder

[0040] 34: Bulging part

[0041] 35: First end

[0042] 36: Second end

[0043] 37: Central Department

[0044] 38: First incision

[0045] 39: Second incision

[0046] 40: Lens section

[0047] 41: Frame

[0048] 42: Operations Department

[0049] 43: Lens retainer

[0050] 44: Protective mirror

[0051] 45: Slit

[0052] L: Optical axis Detailed Implementation

[0053] The following describes the micro-protective bag 10 related to the embodiments based on the drawings. It should be noted that the embodiments of the present invention described below are examples illustrating the invention and are not intended to limit the scope of the invention to the scope of the embodiments described. Therefore, the present invention can be implemented by adding various modifications to the embodiments.

[0054] Figure 1 This is a schematic diagram of the main components of the surgical microscope 1 and the micro-protective bag 10. (See diagram below.) Figure 1 As shown, the surgical microscope 1 mainly includes multiple arms 2, 3, 4, and 5 that are rotatably connected to each other, and an objective lens 6 and an eyepiece 7 mounted on the front end of arm 5. Furthermore, by rotating the connecting parts of arms 2 to 5 relative to each other, the objective lens 6 can be positioned to face the surgical field of view. Moreover, the surgeon can observe the expanded surgical field of view by looking through the eyepiece 7.

[0055] Furthermore, objective lens 6 is a convex lens. And, objective lens 6 is mounted inside the cylindrical housing 8. That is, as... Figure 1 The optical axis L of objective lens 6, represented by a chain line at a point in the middle, is aligned with the axial direction of housing 8.

[0056] Furthermore, the surgical microscope 1 includes an illumination device (e.g., an LED, a xenon lamp). Light emitted from the illumination device is directed through an optical system (lens, mirror, etc.) housed within the arms 2-5 and onto the surgical field of view via the objective lens 6. This light is reflected within the surgical field of view and then re-enters the objective lens 6, allowing the surgeon to observe the surgical field. The direction of the light emitted by the illumination device is, for example, tilted approximately 3-6° relative to the optical axis L.

[0057] All instruments that come into contact with or may come into contact with the surgical site during surgery need to be sterilized. However, since the surgical microscope 1 itself is difficult to sterilize, it is covered with a disposable microprotective bag 10 after each surgery. The microprotective bag 10 is packaged in a sterilized state and is unpacked and placed over the surgical microscope 1 in the operating room.

[0058] (First Embodiment) As Figure 1 As shown, the micro protective bag 10 related to the first embodiment mainly includes a protective bag body 20 and a lens cap unit 30.

[0059] The protective bag body 20 is a sheet-like component formed from a transparent or translucent material (e.g., polyethylene). The protective bag body 20 can adopt any existing shape as long as it covers the main part of the surgical microscope 1. As an example, the protective bag body 20 can be simply sheet-like or bag-like. As another example, as shown in Japanese Patent No. 6749532, the protective bag body 20 may include a first protective bag and a second protective bag in the form of a long strip. Furthermore, as another example, as shown in Japanese Patent No. 7122054, the protective bag body 20 may include a bag-like portion and a strip-like portion.

[0060] The lens cap unit 30 is mounted on the protective bag body 20. More specifically, the micro protective bag 10 is integrated by fusing the lens cap unit 30 to the periphery of the through hole 21 that penetrates the protective bag body 20 in the thickness direction. Furthermore, the lens cap unit 30 is mounted on the housing 8. Moreover, the lens cap unit 30 serves to prevent reflection and glare of incident light from the surgical microscope 1.

[0061] (Structure of lens cap unit 30) Figure 2A This is an oblique view of the lens cover unit 30 related to the first embodiment, viewed from an oblique top. Figure 2B This is an oblique view of the lens cover unit 30 related to the first embodiment, viewed from a lower angle. Figure 3 This is an exploded perspective view of the lens cap unit 30 related to the first embodiment. Figure 4A This diagram shows the state in which the protective lens 32 is rotated to one side in the lens cover unit 30 associated with the first embodiment. Figure 4B This diagram shows the state in which the protective lens 32 is rotated to the other side in the lens cover unit 30 associated with the first embodiment.

[0062] like Figures 2A to 4B As shown, the lens cap unit 30 mainly includes a cap body 31 and a protective lens 32.

[0063] The cover body 31 is the portion used to support the protective mirror 32 and is mounted on the housing 8. The cover body 31 is formed of resin (e.g., polypropylene). The cover body 31 includes, for example, a cylindrical body 33 and a bulge 34. As an example, the cylindrical body 33 and the bulge 34 may be integrally formed. As another example, the bulge 34 may be subsequently attached to the cylindrical body 33.

[0064] The cylindrical body 33 has a cylindrical shape with openings at both ends in the axial direction. Furthermore, the inner diameter of the cylindrical body 33 is set to be larger than the outer dimensions of the various housings 8 to which the lens cap unit 30 is intended to be mounted. Moreover, the axial end face of the cylindrical body 33 (more specifically, the end face of the first end 35) is fused to the periphery of the through hole 21 of the protective bag body 20.

[0065] The tube body 33 is composed of a first end portion 35, a second end portion 36, and a central portion (annular portion) 37. The first end portion 35 is the portion on one end side of the tube body 33 in the axial direction (the side where the objective lens 6 is mounted). The second end portion 36 is the portion on the other end side of the tube body 33 in the axial direction (the side of the surgical field of view). The central portion 37 is the portion between the first end portion 35 and the second end portion 36 in the axial direction. The first end portion 35 and the second end portion 36 have a generally cylindrical shape. The central portion 37 has a continuous annular shape in the circumferential direction. Furthermore, the central portion 37 protrudes radially inward more than the inner circumferential surfaces of the first end portion 35 and the second end portion 36. However, the central portion 37 does not necessarily have to protrude radially inward; the inner circumferential surface of the tube body 33 can also be flush.

[0066] A first cut 38 is provided at the first end 35. The first cut 38 is formed on a portion of the circumferential direction of the first end 35. A second cut 39 is provided at the second end 36. The second cut 39 is formed on a portion of the circumferential direction of the second end 36. That is, the first end 35 and the second end 36 have a generally C-shaped profile.

[0067] Furthermore, the first cut 38 and the second cut 39 are positioned at the same location in the circumferential direction of the cylinder 33. In other words, when viewed from the axial direction of the cylinder 33, the first cut 38 and the second cut 39 are positioned in an overlapping manner. In other words, the first cut 38 and the second cut 39 are positioned on opposite sides of the axial direction, sandwiching the central portion 37. However, the specific positions of the first cut 38 and the second cut 39 are not limited to the aforementioned example.

[0068] A bulge 34 is provided at the first end 35 of the barrel 33 at the location of the first cut 38. More specifically, the bulge 34 connects to both ends of the C-shaped first end 35 that divides the first cut 38. Furthermore, the bulge 34 is an arcuate shape that bulges inward toward the radial direction of the cover body 31. More specifically, the bulge 34 is arranged such that the convex surface of the arcuate shape faces inward toward the radial direction. Moreover, the bulge 34 is configured to be elastically deformable outward along the radial direction. It should be noted that the bulge 34 is not limited to an arcuate shape as long as it is elastically deformable; it can also be other shapes such as wavy shapes. Furthermore, the bulge 34 has the function of holding the housing 8 of the objective lens 6 inside the first end 35 of the barrel 33.

[0069] The protective lens 32 is an optical lens formed of a light-transmitting material (e.g., glass, polycarbonate, etc.). The protective lens 32 includes, for example, a lens portion 40, a frame portion 41, and an operating portion 42. The lens portion 40, the frame portion 41, and the operating portion 42 can be integrally formed or assembled after being formed separately.

[0070] The protective lens 32 is used to protect the objective lens 6 of the surgical microscope 1. More specifically, when the lens cap unit 30 is installed in the housing 8, the protective lens 32 faces the objective lens 6. Furthermore, external light passes through the protective lens 32 and is incident on the objective lens 6. In addition, the protective lens 32 is tilted relative to the optical axis L to prevent reflection and glare of the incident light from the surgical microscope 1.

[0071] The lens portion 40 is, for example, a plane mirror in the shape of a circular plate. However, the lens portion 40 is not limited to a plane lens, and may also be a curved lens that bulges upward into a convex shape. The frame portion 41 is a frame (more specifically, a cylindrical shape) that supports the lens portion 40 and the operating portion 42. One end of the frame portion 41 in the axial direction (the side of the cover body) is perpendicular to the optical axis L. The other end of the frame portion 41 in the axial direction (the side of the surgical field) is inclined at 3 to 6 degrees relative to the optical axis L. Furthermore, the lens portion 40 is fixed to the inner circumferential surface of the other end of the frame portion 41 while in an inclined state of 3 to 6 degrees relative to the optical axis L.

[0072] The operating part 42 protrudes radially outward from the outer peripheral surface of the frame portion 41 within a portion of the protective mirror 32 in the circumferential direction. The operating part 42 is operated by the user to rotate the protective mirror 32 around the optical axis L. In this rotatable state, the protective mirror 32 is supported on the inner peripheral surface of the second end portion 36 of the cylindrical body 33. At this time, the operating part 42 protrudes outward through the second cutout 39, extending further outward than the outer peripheral surface of the cylindrical body 33. Furthermore, as... Figure 4A and Figure 4B As shown, the user moves the operating part 42 in the circumferential direction within the area of ​​the second incision 39. In this way, the protective lens 32 (more specifically, the lens part 40) can be adjusted to an angle that prevents reflection and glare from the illumination device included in the surgical microscope 1.

[0073] (Installation method of lens cap unit 30) Figure 5 This is a plan view showing the state in which the lens cap unit 30 related to the first embodiment is installed in front of the housing 8. Figure 6 This is a plan view showing the state after the lens cap unit 30 related to the first embodiment is installed in the small-diameter housing 8. Figure 7 This is a plan view showing the state after the lens cap unit 30 related to the first embodiment is installed in the large-diameter housing 8.

[0074] First, such as Figure 5 As shown, the lens cap unit 30 installed in front of the housing 8 has its bulge 34 in its most bulged state (i.e., without elastic deformation). Furthermore, as... Figure 6 and Figure 7As shown, the housing 8 is pressed into the first end 35 of the cylinder 33 to cause the bulge 34 to elastically deform. In this way, the elastically deformed bulge 34 and the inner circumferential surface of the first end 35 of the bulge 34, which is sandwiched between the center of the cylinder 33, come into contact with the housing 8, thereby installing the lens cap unit 30 onto the housing 8.

[0075] Here, as Figure 6 and Figure 7 As shown, the amount of elastic deformation of the bulge 34 varies depending on the diameter of the housing 8. More specifically, the larger the diameter of the housing 8, the greater the amount of elastic deformation of the bulge 34. That is, the lens cap unit 30 associated with the first embodiment is configured to be able to be installed on housings 8 of different diameters. Furthermore, when the lens cap unit 30 is removed from the housing 8, the bulge 34 will elastically return to its original position. Figure 5 The state.

[0076] (Effects of the First Embodiment) According to the first embodiment, by elastically deforming the bulge 34, the number of parts in the lens cap unit 30 can be reduced compared to Patent Document 6, which involves extending and retracting the protrusion. Furthermore, since the elastically deformable bulge 34 is in surface contact with the inner circumferential surface of the barrel 33 in the housing 8, the objective lens 6 (housing 8) can be properly held in place by the lens cap unit 30.

[0077] Furthermore, according to the first embodiment, by configuring the bulge 34 so that the convex surface faces the housing 8, the lens cover unit 30 can be held in the housing 8 more appropriately than the case where the concave surface faces the housing 8.

[0078] Furthermore, according to the first embodiment, by having the protective lens 32 (lens portion 40) supported by the cover body 31 in a state of tilt relative to the optical axis L, it is possible to prevent the reflection of incident light and glare.

[0079] Furthermore, according to the first embodiment, by providing the first cut 38 and the second cut 39 at the same position in the circumferential direction, the operation section 42 can be operated near the bulge 34 of the objective lens 6. This prevents the relative position of the objective lens 6 and the lens cap unit 30 from shifting when operating the operation section 42. As another example, the first cut 38 and the second cut 39 may also be arranged on opposite sides, sandwiching the center of the barrel 33.

[0080] Furthermore, according to the first embodiment, by forming a central portion 37 between the first end 35 and the second end 36, the reduction in rigidity of the cylinder 33 caused by the first cut 38 and the second cut 39 can be compensated. In addition, the central portion 37, which protrudes inward in the radial direction, abuts against the front end of the housing 8 and also functions as a stop to prevent the housing 8 from being over-inserted.

[0081] (Second Embodiment) Refer to Figures 8A to 10BThe lens cap unit 30A related to the second embodiment will be described below. It should be noted that components common to the first embodiment will be given the same reference numerals and detailed descriptions will be omitted; instead, the description will focus on the differences. The lens cap unit 30A related to the second embodiment differs from the first embodiment in that it further includes the shapes of the lens holder 43 and the protective lens 44; otherwise, it is common to the first embodiment.

[0082] Figure 8A This is an oblique view of the lens cap unit 30A related to the second embodiment, viewed from an oblique top. Figure 8B This is an oblique view of the lens cover unit 30A related to the second embodiment, viewed from a lower angle. Figure 9 This is an exploded perspective view of the lens cap unit 30A related to the second embodiment. Figure 10A This diagram shows the state in which the protective lens 44 is rotated to one side in the lens cover unit 30A related to the second embodiment. Figure 10B This diagram shows the state in which the protective lens 44 is rotated to the other side in the lens cover unit 30A related to the second embodiment.

[0083] The lens holder 43 has a cylindrical shape with openings at both ends in the axial direction. Furthermore, a slit 45 is formed on the outer peripheral surface of the lens holder 43 for inserting and removing the protective lens 44. The slit 45 is inclined relative to a plane perpendicular to the optical axis L. The lens holder 43 is detachably held at the second end 36 of the cylindrical body 33. The lens holder 43 holds the protective lens 44 inserted into the slit 45 in a state of inclination relative to the optical axis L. The protective lens 44 in the second embodiment is equivalent to the protective lens 32 in the first embodiment, which omits the frame portion 41 and has the operating portion 42 directly mounted on the outer edge of the flat lens portion 40.

[0084] (Effects of the Second Embodiment) The second embodiment can achieve the same effect as the first embodiment. In addition, by supporting the protective lens 44 on the cover body 31 via the lens holder 43, the existing lens holder 43 and protective lens 44 can be used to form the lens cover unit 30A.

Claims

1. A micro-protective bag, comprising: The lens cap unit, which is attached to and detached from the objective lens of the surgical microscope, and The protective bag body is used to cover the surgical microscope; The lens cap unit includes: The cover body is a cylindrical shape with an inner diameter larger than that of the shell, and has a first slit in a portion of its circumferential direction; and A protective lens, used to protect the objective lens; The cover body includes a bulge that is connected to both ends of the first cut and bulges inward in the radial direction of the cover body, and can elastically deform outward in the radial direction.

2. The micro-protective bag as claimed in claim 1, wherein the bulge is configured such that the arc-shaped convex surface faces inward in the radial direction.

3. The micro protective bag as claimed in claim 1, wherein the protective lens is supported by the cover body in a state of tilt relative to the optical axis of the objective lens.

4. The micro protective bag of claim 3, wherein the protective lens includes an operating part that protrudes radially outward from a portion in the circumferential direction and is operated by a user to rotate the protective lens about the optical axis, and the cover body has a second cut in a portion in the circumferential direction for the operating part to pass through.

5. The micro protective bag as claimed in claim 4, wherein the first cut is provided on one end side of the cover body in the axial direction; the second cut is provided on the other end side of the cover body in the axial direction, and is located at the same position as the first cut in the circumferential direction.

6. The micro-protective bag as claimed in claim 5, wherein the cover body includes an annular portion that protrudes radially inward and is continuous in the circumferential direction between the first cut and the second cut in the axial direction.

7. The micro protective bag as claimed in claim 1, wherein the lens cap unit includes a lens holder that holds the protective lens in a state of tilt relative to the optical axis of the objective lens, the lens holder being configured to be detachable from the cap body.

Images