Lens cover and endoscope protective sleeve using same

Abstract

The utility model discloses a lens cap and an endoscope protective sleeve using the same, and relates to the technical field of medical instruments, the lens cap comprises a lens cap body, one end of the lens cap body close to a lens is provided with a shading ring, the diameter of the shading ring is smaller than that of the lens cap body, and the inner ring of the shading ring is a lens area. A light source area is arranged between the outer ring of the shading ring and the edge of the lens cover, the diameter of the lens area is not smaller than that of the lens, and the shading ring can prevent light emitted by the light source from entering the lens after reflection. Light emitted by the light source is prevented from entering the lens after being reflected through the shading ring, the problems of light spots, halo and the like caused by reflection, refraction and astigmatism in a view field of the lens are prevented, the light emitted by the light source cannot enter the lens from a gap between the shading ring and the lens through tight attachment of the shading ring and the lens, and the lens is prevented from being damaged. Therefore, the problems of light spots, halo and the like caused by reflected light, refracted light and scattered light in the use process of the lens are further avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a lens cover and an endoscope protective sleeve using the lens cover. Background Art

[0002] During use, existing endoscope protective covers will have problems such as "a lot of reflections, whitening, and halos in the operator's field of view", which seriously affects the doctor's observation of lesions and diagnosis of diseases; and although there are lens covers in the prior art that isolate reflected light to avoid the occurrence of halos, the lens covers will still have halos and reflections during use, and do not really prevent the generation of reflections and halos.

[0003] For example, in patent document CN218500684U, a protective cover adds a special light-transmitting coating material to the inside of the lens cover. The thickness of the coating is one-quarter of the wavelength of visible light, and the peaks and troughs just offset each other, thereby shielding the reflected light and preventing the reflected light from gathering around the lens, thus avoiding the appearance of halo. However, since the thickness of the coating is difficult to accurately control to one-quarter of the wavelength of visible light, when operators use the protective cover in the patent document, problems such as reflection and halo will still occur in the field of view.

[0004] Therefore, how to avoid problems such as light spots and halos caused by reflection, refraction and astigmatism during the use of the lens cover has become a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0005] The utility model aims to provide a lens cover and an endoscope protective cover using the lens cover, so as to solve the problems existing in the above-mentioned prior art and avoid the problems of light spots, halos, etc. caused by reflection, refraction and astigmatism of the lens cover during use.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a lens cover, comprising a lens cover body which is used to be assembled on the lens of an endoscope and can transmit light, a light shielding ring is provided at one end of the lens cover body close to the lens, the diameter of the light shielding ring is smaller than the diameter of the lens cover body, the inner circle of the light shielding ring is a lens area for inserting the lens, the area between the outer circle of the light shielding ring and the edge of the lens cover is a light source area for inserting a light source for illuminating the field of view of the lens, and the diameter of the lens area is not smaller than the diameter of the lens, and the light shielding ring can block the light emitted by the light source from entering the lens after reflection.

[0008] Preferably, the lens cover further comprises a cylindrical casing surrounding the edge of the lens cover body, and the cylindrical casing is used to be sleeved on the lens end of the endoscope.

[0009] Preferably, the light shielding ring is embedded in the lens cover body, and one end of the light shielding ring for contacting the lens protrudes out of the lens cover body; and the protruding thickness of the light shielding ring is 0.05mm-0.3mm.

[0010] Preferably, the difference between the thickness of the lens cover body and the thickness of the light-shielding ring embedded in the lens cover body is 0.05mm-2.0mm; the thickness of the lens cover body is 0.1mm-5.0mm; the inner diameter of the light-shielding ring is 0.05mm-3.0mm; the wall thickness of the light-shielding ring is 0.05mm-3.0mm; the inner diameter of the lens cover body is 1mm-10mm.

[0011] Preferably, the light shielding ring and the lens cover body are two-color injection molded, and the melting point of the lens cover body is higher than the melting point of the light shielding ring; the lens cover body is a highly transparent lens cover body; and the light shielding ring is a black elastic light shielding ring.

[0012] The present invention also provides an endoscope protective cover using the above lens cover, the endoscope protective cover comprises a thin film tube connected to the cylindrical shell at a first end, and a joint for clamping on the outer wall of the endoscope is connected to the second end of the thin film tube;

[0013] The joint has a channel for inserting an endoscope insertion portion, and the channel, the film tube and the lens cover body are connected in sequence.

[0014] Preferably, the outer shape of the connector is a stepped structure, and a rib for guiding the endoscope is provided between the inner hole of the small end of the connector and the inner hole of the large end of the connector, and the smallest end of the connector is connected to the film tube;

[0015] The channel includes a plurality of first constant diameter sections and first variable diameter sections alternately arranged along the insertion direction of the endoscope insertion portion, the diameter of the first variable diameter section gradually decreases along the insertion direction of the endoscope insertion portion, and the diameter of the large end of the first variable diameter section is the same as the diameter of the first constant diameter section.

[0016] Preferably, the film tube comprises a reducing section for connecting to the smallest end of the joint, and a constant diameter section for connecting to the cylindrical casing;

[0017] The diameter of the variable diameter section gradually decreases in a direction away from the joint, and the diameter of the variable diameter section at one end away from the joint is the same as the diameter of the constant diameter section;

[0018] One end of the variable diameter section away from the constant diameter section is sleeved on the smallest end of the joint, and one end of the constant diameter section away from the variable diameter section is sleeved on the outside of the cylindrical casing; and the variable diameter section is bonded to the joint, and the constant diameter section is bonded to the cylindrical casing.

[0019] Preferably, a section of the cylindrical casing close to the constant diameter section is provided with a sinking step, and the depth of the sinking step is the same as the thickness of the constant diameter section.

[0020] Preferably, the joint is an injection molded joint, and the hardness of the joint is Shore hardness 60A±10A; the film tube is a natural latex film tube or a thermoplastic polyurethane elastomer rubber film tube, the wall thickness of the film tube is 0.05mm-0.3mm, and the inner and outer surfaces of the film tube are both frosted surfaces.

[0021] Compared with the prior art, the utility model has achieved the following technical effects:

[0022] The utility model blocks the light emitted by the light source from entering the lens after reflection through the shading ring, thereby preventing problems such as light spots and halos caused by reflection, refracted light and astigmatism in the field of view of the lens. The shading ring and the lens are tightly fitted together, so that the light emitted by the light source will not enter the lens through the gap between the shading ring and the lens after reflection, thereby further avoiding problems such as light spots and halos caused by reflection, refracted light and astigmatism during the use of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the combination of an endoscope and a protective cover;

[0025] Figure 2 is a schematic diagram of a horizontal cross-sectional view of a lens cover;

[0026] Figure 3 is a schematic cross-sectional view of a lens cover;

[0027] Figure 4 It is a schematic diagram of the structure of the endoscope protective cover;

[0028] Figure 5 is a schematic diagram of the structure of the joint;

[0029] Figure 6 is a schematic diagram of the structure of the film tube;

[0030] Figure 7 Schematic diagram of the principle of eliminating reflection and halo;

[0031] Among them, 1. connector; 2. film tube; 3. lens cover; 4. endoscope insertion part; 5. left light source; 6. lens; 7. right light source; 101. first reducing section; 102. rib; 103; small head; 301. light shielding ring; 302. lens cover body; 303. sunken step; 501. first light; 502. second light; 501-1. first refracted light; 502-1. second refracted light; 501-2. first reflected light; 502-2. second reflected light. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] like Figure 1-Figure 7 As shown, the utility model discloses a lens cover 3, including a lens cover body 302 for being assembled on the lens 6 of an endoscope and being light-transmissive, a light-shielding ring 301 is provided at one end of the lens cover body 302 close to the lens 6, the diameter of the light-shielding ring 301 is smaller than the diameter of the lens cover body 302, the inner circle of the light-shielding ring 301 is a lens area for inserting the lens 6, the outer circle of the light-shielding ring 301 and the edge of the lens cover 3 are between a light source area for inserting a light source for illuminating the field of view of the lens 6, and the diameter of the lens area is not less than the diameter of the lens 6, and the light-shielding ring 301 can block the light emitted by the light source from entering the lens 6 after reflection.

[0035] The utility model uses the shading ring 301 to block the light emitted by the light source from entering the lens 6 after reflection, thereby preventing problems such as light spots and halos in the field of view of the lens 6 caused by reflection, refracted light and astigmatism. In addition, the shading ring 301 is tightly fitted to the lens 6, so that the light emitted by the light source will not enter the lens 6 through the gap between the shading ring 301 and the lens 6 after reflection, thereby further avoiding problems such as light spots and halos caused by reflection, refracted light and astigmatism during the use of the lens 6.

[0036] Among them, it should be noted that the lens cover body 302 in the utility model can be particularly used for assembly on the lens 6 of a medical endoscope. In the utility model, the light shielding ring 301 and the lens cover body 302 are two-color injection molded, and the melting point of the lens cover body 302 is higher than the melting point of the light shielding ring 301. Specifically, the lens cover body 302 material, such as PC material, is first injected in the first injection molding. The melting point of PC material is between 230 and 240°C, and the injection molding temperature is controlled to be 250-300°C. After the PC injection molding is cooled and molded, the light shielding ring 301 material, such as TPE material, is secondarily injected. The melting point of TPE material is between 150 and 200°C, and the injection molding temperature is controlled to be 180-220°C. When the second injection molding is performed, the PC material will not melt again, thereby realizing that the same lens cover 3 has two materials. The lens 6 and the light source in the utility model are an integral structure, and the lens area and the light source area only refer to the areas in the lens cover 3 corresponding to the lens 6 and the light source respectively.

[0037] In the present invention, the lens cover body 302 and the light shielding ring 301 can be made of a variety of different materials. The lens cover body 302 is made of a highly transparent material, for example, the lens cover body 302 can be made of glass, i.e., a glass lens cover body 302, the lens cover body 302 can be made of polycarbonate (PC), i.e., a polycarbonate (PC) lens cover body 302, or the lens cover body 302 can be made of polymethyl methacrylate (PMMA), i.e., a polymethyl methacrylate (PMMA) lens cover body 302, or the lens cover body 302 can be made of polyethylene terephthalate (PET), i.e., a polyethylene terephthalate (PET) lens cover body 302. The light shielding ring 301 is made of an elastic material with light shielding performance, and the light shielding ring 301 can be made of not only a black elastic material, but also other elastic materials with light shielding functions, for example, elastic materials of dark colors such as gray, brown, and coffee. Specifically, the shading ring 301 can be made of thermoplastic elastomer (TPE), thermoplastic rubber (TPR), thermoplastic polyurethane elastomer rubber (TPU), or silicone, so as to effectively prevent the light emitted by the light source from entering the lens 6 after reflection, prevent problems such as light spots and halos caused by reflection, refraction and astigmatism, and ensure the clarity of image quality.

[0038] Through the above-mentioned two-color injection molding and material selection, the light transmittance of the lens cover body 302 in the utility model is made to be above 90%, so as to ensure that the image quality of the lens 6 is not affected during use, thereby ensuring the normal diagnosis of the doctor.

[0039] like Figure 1-Figure 2 As shown, the lens cover 3 in the present invention further includes a cylindrical casing surrounding the edge of the lens cover body 302, and the cylindrical casing is used to be mounted on the lens end of the endoscope; or, the lens cover 3 in the present invention may not include the cylindrical casing.

[0040] Furthermore, in the utility model, the light shielding ring 301 is embedded in the lens cover body 302, and the end of the light shielding ring 301 that contacts the lens 6 protrudes from the lens cover body 302. With such a configuration, when the lens cover 3 is used in conjunction with the lens 6 of the medical endoscope, the light shielding ring 301 can play a sealing role under the squeezing effect of the lens 6, preventing the light emitted by the light source from entering the lens 6 from the gap between the lens 6 and the light shielding ring 301, and preventing the image from generating light spots, halos, and other problems caused by reflection, refraction, and astigmatism. The protruding thickness of the light shielding ring 301 is 0.05mm-0.3mm, so as to avoid the reflection and scattering of light in the lens 6 and ensure sealing.

[0041] In addition, in the present invention, the difference between the thickness of the lens cover body 302 and the thickness of the light shielding ring 301 embedded in the lens cover body 302 is 0.05mm-2.0mm; the thickness of the lens cover body 302 is 0.1mm-5.0mm; the inner diameter of the light shielding ring 301 is 0.05mm-3.0mm; the wall thickness of the light shielding ring 301 is 0.05mm-3.0mm, and the inner diameter of the lens cover body is 1mm-10mm. Among them, by limiting the inner diameter and wall thickness of the light shielding ring 301, it is ensured that the lens 6 of the medical endoscope has a better field of view quality; by limiting the thickness of the lens cover body 302, the field of view quality of the medical endoscope inspection is further ensured; by limiting the difference between the thickness of the lens cover body 302 and the thickness of the light shielding ring 301 embedded in the lens cover body 302, the sealing and light shielding effect of the lens cover 3 on the medical endoscope are ensured.

[0042] In addition, if Figure 1 , Figure 4-Figure 7 As shown, the present invention also provides an endoscope protective cover using the above lens cover 3, the endoscope protective cover comprises a thin film tube 2 connected to a cylindrical shell at the first end, and a joint 1 for clamping on the outer wall of the endoscope is connected to the second end of the thin film tube 2; the joint 1 has a channel for inserting the endoscope insertion part 4, and the channel, the thin film tube 2 and the lens cover body 302 are connected in sequence. So that the endoscope insertion part 4 can smoothly enter from the joint 1 and pass through the thin film tube 2 to reach the area near the lens cover body 302.

[0043] The endoscope insertion part 4 mentioned in the present invention is provided with a lens 6 and a light source from the inside to the outside, and the lens 6 is a lens 6 of a medical endoscope. The light source has various settings, and the light source can be a ring light source located on the outer ring of the light shielding ring 301, or a plurality of point light sources arranged around the outer ring of the light shielding ring 301 and emitting light toward the end surface of the lens cover body 302.

[0044] Furthermore, if Figure 4-Figure 5As shown, the appearance of the connector 1 in the utility model is a stepped structure, and a rib plate 102 for guiding the endoscope is provided between the inner hole of the small end of the connector 1 and the inner hole of the large end of the connector 1, and the smallest end of the connector 1 is connected to the film tube 2; the channel includes a plurality of first constant diameter sections and first variable diameter sections 101 alternately provided along the insertion direction of the endoscope insertion part 4, and the diameter of the first variable diameter section 101 gradually decreases along the insertion direction of the endoscope insertion part 4, and the diameter of the large end of the first variable diameter section 101 is the same as the diameter of the first constant diameter section. Among them, the taper of the first variable diameter section 101 is 2°, and the setting of the first variable diameter section 101 enables the connector 1 to be better connected with the endoscope, and the rib plate 102 plays a transition role, making the insertion of the endoscope smoother.

[0045] like Figure 4 , Figure 6 As shown, the thin film tube 2 in the utility model includes a reducing section for connecting to the smallest end of the joint 1, and a constant diameter section for connecting to the cylindrical casing; the diameter of the reducing section gradually decreases in the direction away from the joint 1, and the diameter of the end of the reducing section away from the joint 1 is the same as the diameter of the constant diameter section; the end of the reducing section away from the constant diameter section is sleeved on the smallest end of the joint 1, and the end of the constant diameter section away from the reducing section is sleeved on the outside of the cylindrical casing; the reducing section and the joint 1 are bonded together, and the constant diameter section and the cylindrical casing are bonded together.

[0046] The thin film tube 2 is in a variable diameter form mainly to simplify the assembly process. Since the outer diameter of the lens cover 3 is different from the outer diameter of the small head 103 of the connector 1, the thin film tube 2 is expanded in order to more conveniently cover the small head 103 of the connector 1. By bonding the variable diameter section to the connector 1 section and the constant diameter section to the cylindrical casing, the connector 1, the thin film tube 2 and the lens cover 3 can be firmly connected together, thereby ensuring the stability of the endoscope protective cover during use.

[0047] like Figure 1-Figure 2 As shown, a section of the cylindrical shell in the utility model near the constant diameter section is provided with a sinking step 303, and the depth of the sinking step 303 is the same as the thickness of the constant diameter section. In this way, when the lens cover 3 in the utility model enters the lesion site such as the human nose and throat with the medical endoscope for inspection, it can reduce the patient's discomfort caused by foreign objects.

[0048] The joint 1 in the utility model is an injection molded joint 1, which is injection molded by polymer material PVC or similar materials, and the hardness of the joint 1 is Shore hardness 60A±10A; by adopting the soft rubber material with the above hardness, the joint 1 can be better clamped with the endoscope, so that the endoscope will not fall off the endoscope protective cover during use.

[0049] The film tube 2 is a natural latex film tube 2 or a thermoplastic polyurethane elastomer rubber film tube 2, and the wall thickness of the film tube 2 is 0.05mm-0.3mm, which makes the film tube 2 have good tensile properties, and the elongation at break is not less than 500%, and the inner surface and outer surface of the film tube 2 are both frosted surfaces, so that the endoscope can be easily inserted into the film tube 2 or withdrawn from the film tube 2. This also makes it difficult for the endoscope to stick to the film tube 2 during the process of putting on and removing it, which facilitates the removal of the endoscope.

[0050] The principle that the light shielding ring 301 can prevent the light emitted by the light source from entering the lens 6 after being reflected is as follows: Figure 7 As shown, after the light emitted by the light source passes through the lens cover body 302, it will be reflected and refracted at the junction of the lens cover body 302 and the air. When the light source is a plurality of point light sources arranged around the outer ring of the inner light shielding ring 301, the left light source 5 and the right light source 7 are respectively arranged on both sides of the light shielding ring 301. Take the left light source 5 as an example: the entire end surface of the light source will emit light, and the outermost and middle of the left light source 5 will emit the first light 501 and the second light 502, which will be refracted and reflected at the junction of the lens cover body 302 and the air. The first refracted light 501-1 and the second refracted light 502-1 enter the air, illuminating the front field of view, so that the operator can see the front (lesion) through the lens 6; while the first reflected light 501-2 and the second reflected light 502-2 are blocked by the light shielding ring 301 in the lens cover, so the first reflected light 501-2 and the second reflected light 502-2 will not enter the lens 6, thereby avoiding the phenomenon of halo on the image on the display. Therefore, the light emitted from any part of the end face of the light source and reflected back from the interface between the lens cover body 302 and the air will be blocked by the light shielding ring 301 and will not enter the lens 6 to cause the generation of halo.

[0051] In summary, the utility model solves the problems of the existing endoscopes, such as long disinfection time, high sterilization cost, uncertain disinfection and sterilization effect, inability to meet the needs of continuous outpatient operation, and the service life of the endoscope will be affected by repeated immersion, through the endoscope protective cover. It also solves a series of problems such as the difficulty of disinfection, incomplete clinical disinfection, and the risk of cross infection for patients. At the same time, through the setting of the shading ring 301, the endoscope can still maintain clear image quality after the endoscope protective cover is put on, and no reflection phenomenon occurs.

[0052] Furthermore, the lens cover 3 in the present invention is convenient to design and produce, and is made by two-color injection molding, so the production process is simple and suitable for mass production.

[0053] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A lens cover, characterized in that: It comprises a lens cover body which is used to be assembled on the lens of an endoscope and is translucent. A light-shielding ring is provided at one end of the lens cover body close to the lens. The diameter of the light-shielding ring is smaller than the diameter of the lens cover body. The inner circle of the light-shielding ring is a lens area for inserting the lens. Between the outer circle of the light-shielding ring and the edge of the lens cover is a light source area for inserting a light source for illuminating the field of view of the lens. The diameter of the lens area is not smaller than the diameter of the lens. The light-shielding ring can block the light emitted by the light source from entering the lens after reflection.

2. The lens cover according to claim 1, characterized in that: The lens cover also includes a cylindrical casing surrounding the edge of the lens cover body, and the cylindrical casing is used for being sleeved on the lens end of the endoscope.

3. The lens cover according to claim 2, characterized in that: The light shielding ring is embedded in the lens cover body, and one end of the light shielding ring used for contacting the lens protrudes out of the lens cover body; and the protruding thickness of the light shielding ring is 0.05mm-0.3mm.

4. The lens cover according to claim 3, characterized in that: The difference between the thickness of the lens cover body and the thickness of the shading ring embedded in the lens cover body is 0.05mm-2.0mm; the thickness of the lens cover body is 0.1mm-5.0mm; the inner diameter of the shading ring is 0.05mm-3.0mm; the wall thickness of the shading ring is 0.05mm-3.0mm; the inner diameter of the lens cover body is 1mm-10mm.

5. The lens cover according to claim 1, characterized in that: The light shielding ring and the lens cover body are two-color injection molded, and the melting point of the lens cover body is higher than the melting point of the light shielding ring; the lens cover body is a highly transparent lens cover body; and the light shielding ring is a black elastic light shielding ring.

6. An endoscope protective cover using the lens cover according to any one of claims 2 to 4, characterized in that: The endoscope protective cover comprises a thin film tube connected to the cylindrical shell at a first end, and a joint for clamping on the outer wall of the endoscope is connected to the second end of the thin film tube; The joint has a channel for inserting an endoscope insertion portion, and the channel, the film tube and the lens cover body are connected in sequence.

7. The endoscope protective cover according to claim 6, characterized in that: The outer shape of the connector is a stepped structure, and a rib for guiding the endoscope is provided between the inner hole of the small end of the connector and the inner hole of the large end of the connector, and the smallest end of the connector is connected to the film tube; The channel includes a plurality of first constant diameter sections and first variable diameter sections alternately arranged along the insertion direction of the endoscope insertion portion, the diameter of the first variable diameter section gradually decreases along the insertion direction of the endoscope insertion portion, and the diameter of the large end of the first variable diameter section is the same as the diameter of the first constant diameter section.

8. The endoscope protective cover according to claim 6, characterized in that: The film tube comprises a reduced diameter section for connecting to the smallest end of the joint, and a constant diameter section for connecting to the cylindrical casing; The diameter of the variable diameter section gradually decreases in a direction away from the joint, and the diameter of the variable diameter section at one end away from the joint is the same as the diameter of the constant diameter section; One end of the variable diameter section away from the constant diameter section is sleeved on the smallest end of the joint, and one end of the constant diameter section away from the variable diameter section is sleeved on the outside of the cylindrical casing; and the variable diameter section is bonded to the joint, and the constant diameter section is bonded to the cylindrical casing.

9. The endoscope protective cover according to claim 8, characterized in that: A section of the cylindrical casing close to the constant diameter section is provided with a sinking step, and the depth of the sinking step is the same as the thickness of the constant diameter section.

10. The endoscope protective cover according to claim 6, characterized in that: The joint is an injection molded joint, and the hardness of the joint is Shore hardness 60A±10A; the film tube is a natural latex film tube or a thermoplastic polyurethane elastomer rubber film tube, the wall thickness of the film tube is 0.05mm-0.3mm, and the inner and outer surfaces of the film tube are both frosted surfaces.

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