CN220207957U - Lens device and endoscope - Google Patents

Abstract

The application discloses a lens device and endoscope belongs to the technical field of making a video recording. The lens device includes: the lens comprises a first lens, a first lens cone and a sealing ring structure. The first lens is arranged in the lens mounting position of the first lens barrel, the sealing ring structure can be arranged in a gap between the first lens and the inner wall of the first lens barrel, and the sealing ring structure is in interference fit with the first lens and the inner wall of the first lens barrel and is used for sealing the gap, so that impurities in the external environment are prevented from entering the lens device through the gap. And when the sealing ring is in interference fit, the extruded sealing ring structure can be partially positioned in the overflow trough, so that deformation or breakage caused by overlarge extrusion force of the first lens can be avoided, and the sealing effect of the lens device can be improved.

Description

Lens device and endoscope

Technical Field

The present disclosure relates to the field of imaging technologies, and in particular, to a lens device and an endoscope.

Background

Currently, the application fields and the scope of lens devices are becoming wider and wider, such as vehicle-mounted lenses, monitoring lenses, moving camera lenses, endoscope lenses, and the like, which are applied to outdoor environments. The waterproof performance of the lens device is required to be high in the application scenes.

A lens device comprises a lens barrel, a lens and an adhesive layer, wherein the lens can be positioned in the lens barrel, and the lens barrel can be fixed and sealed through the adhesive layer to isolate the entry of external vapor so as to achieve the effects of water resistance and dust resistance.

The above lens device has poor sealing property.

Disclosure of Invention

The embodiment of the application provides a lens device and an endoscope. The technical scheme is as follows:

according to an aspect of the present application, there is provided a lens apparatus including:

the first lens, the first lens cone and the sealing ring structure;

the first lens comprises a light incident surface, a light emergent surface and a side surface, and the side surface is respectively connected with the light incident surface and the light emergent surface;

a lens mounting position is arranged on the inner wall of the first lens barrel, the first lens is positioned in the lens mounting position, and a material overflow groove is arranged in the lens mounting position;

the sealing ring structure is positioned between the first lens and the inner wall of the first lens cone, and is respectively abutted with the side surface of the first lens and the inner wall of the first lens cone, and the sealing ring structure is partially positioned in the flash groove.

Optionally, the first lens barrel includes a first tubular housing having opposite first and second ends, and a first extension connected to the first end of the first tubular housing and extending from the first end of the first tubular housing in a direction approaching an axis of the first tubular housing;

one end of the sealing ring structure is abutted with the first extension part, and the inner diameter of the first tubular shell gradually increases along the direction from the second end of the first tubular shell to the first end of the first tubular shell.

Optionally, an included angle between a bus of the inner wall of the first tubular housing and the axis of the first tubular housing ranges from 2 degrees to 7 degrees.

Optionally, the sealing ring structure comprises an annular first sealing ring and an annular second sealing ring, and the first sealing ring and the second sealing ring are arranged along the axial direction of the first lens cone;

the flash groove comprises an annular first groove and an annular second groove, the first groove and the second groove are distributed along the axial direction of the first lens barrel, and the first groove and the second groove encircle the axial line of the first lens barrel;

the first sealing ring and the second sealing ring are both positioned between the side surface of the first lens and the inner wall of the first lens cone, the first sealing ring part is positioned in the first groove, and the second sealing ring part is positioned in the second groove.

Optionally, the sealing ring structure has a connected inner wall and a first annular surface, and the first annular surface is located at an end of the sealing ring structure away from the first extension portion;

the junction of the inner wall of the sealing ring structure and the first annular surface is provided with a chamfer structure.

Optionally, an included angle between the chamfer structure and the axis of the first lens barrel ranges from 30 degrees to 60 degrees.

Optionally, the first lens barrel has a second extension part connected with the second end of the first tubular housing, and the second extension part extends from the second end of the first tubular housing to a direction close to the axis of the first tubular housing;

one end of the sealing ring structure, which is away from the first extension part, is abutted with the second extension part, and in the radial direction of the first lens barrel, the distance between the edge of the second extension part, which is close to one side of the axis of the first lens barrel, and the inner wall of the first tubular shell is smaller than the distance between the inner wall of the sealing ring structure and the inner wall of the first tubular shell.

Optionally, the lens device further includes a second lens barrel, the second lens barrel includes a second tubular housing and an annular pressure-bonding structure, the annular pressure-bonding structure is located inside the second tubular housing and connected with an inner wall of the second tubular housing;

the second lens cone is fixedly connected with the second end of the first tubular shell, and the compression joint structure is abutted to the edge of the light emergent surface of the first lens.

Optionally, the outer wall of the first tubular housing is attached to the inner wall of the second tubular housing;

the outer wall of the first tubular shell is provided with an annular clamping groove surrounding the first tubular shell;

the lens device further comprises a sealing ring, wherein the sealing ring is located in the annular clamping groove, and the sealing ring is in contact with the inner wall of the second tubular shell.

According to another aspect of the present application, there is provided an endoscope including the lens device described above.

The beneficial effects that technical scheme that this application embodiment provided include at least:

a lens device including a first lens, a first barrel, and a seal ring structure is provided. The first lens is arranged in the lens mounting position of the first lens barrel, the sealing ring structure can be arranged in a gap between the first lens and the inner wall of the first lens barrel, and the sealing ring structure is in interference fit with the first lens and the inner wall of the first lens barrel and is used for sealing the gap, so that impurities in the external environment are prevented from entering the lens device through the gap. And in addition, the extruded sealing ring structure can be partially positioned in the overflow trough during interference fit, so that deformation or breakage caused by overlarge extrusion force applied to the first lens is avoided. The problem of poor sealing performance of the lens device in the related art can be solved, and the sealing effect of the lens device is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a lens device according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of the lens apparatus shown in FIG. 1 at A1-A2 position;

FIG. 3 is an exploded view of the lens assembly of FIG. 2;

fig. 4 is a schematic structural view of a first lens barrel according to an embodiment of the present disclosure;

fig. 5 is a schematic structural view of another first lens barrel according to the embodiment of the present application;

fig. 6 is a schematic structural diagram of a seal ring structure according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another lens apparatus according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of another seal ring structure according to an embodiment of the present disclosure;

fig. 9 is a schematic structural view of another first barrel according to the embodiment of the present application;

fig. 10 is a schematic structural diagram of another lens apparatus according to an embodiment of the present disclosure;

fig. 11 is a schematic structural view of another first barrel according to the embodiment of the present application;

fig. 12 is a schematic structural view of another first lens barrel and seal ring structure according to an embodiment of the present disclosure;

fig. 13 is a schematic structural view of a second lens barrel according to an embodiment of the present disclosure;

fig. 14 is a schematic structural diagram of another lens apparatus according to an embodiment of the present disclosure;

fig. 15 is a schematic structural diagram of another lens apparatus according to an embodiment of the present application.

Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The lens device is an optical member for generating an image. An endoscope is a detection instrument including an illumination system and an imaging system, and is one of the important surgical instruments in minimally invasive surgery. The endoscope includes a light source assembly, an imaging system, and a display assembly, wherein the imaging system includes a lens device and an image sensor. In the use of endoscope, doctor inserts the camera lens device of endoscope into patient's abdominal cavity, makes camera lens device reach the pathological change position to use light source subassembly illumination, reuse camera lens device and image sensor among the imaging system to gather the image, and show on the image transmission that will gather to the display module, so that doctor can observe pathological change condition in real time.

Because the lens device of the endoscope is applied to complex environments, such as liquid environments, if the sealing effect of the lens device is poor, the lens in the lens device can be caused to be fogged to influence the use effect, and if serious, the lens device can be damaged, therefore, the lens device comprises a lens barrel, a lens and an adhesive layer, the lens can be positioned in the lens barrel, and the lens barrel can be fixed and sealed through the adhesive layer to isolate the entry of external water vapor so as to achieve the waterproof and dustproof effects.

In the process of assembling the lens device, glue can be injected into a gap between the lens barrel and the lens to form a glue layer so as to seal the gap between the lens barrel and the lens, however, as the glue is a liquid substance, in the process of injecting the glue, the glue flows unevenly, which results in poor uniformity of the glue layer at a plurality of positions between the lens barrel and the lens, so that the pasting efficacy at part of positions is reduced, when the glue layer ages after long-time use, the sealing performance at the part of positions is ineffective, and the sealing performance of the lens barrel device is poor.

The embodiment of the application provides a lens device and an endoscope, which can solve the problems in the related art.

Fig. 1 is a schematic structural diagram of a lens apparatus 10 according to an embodiment of the present application, fig. 2 is a schematic structural diagram of a cross section of the lens apparatus 10 shown in fig. 1 at A1-A2 position, and fig. 3 is a schematic exploded structural diagram of the lens apparatus 10 shown in fig. 2, please refer to fig. 1, fig. 2 and fig. 3. The lens apparatus 10 may include: the first lens 11, the first lens barrel 12 and the sealing ring structure 13.

The first lens 11 may include a light incident surface 111, a light emergent surface 112, and a side surface 113, and the side surface 113 is connected to the light incident surface 111 and the light emergent surface 112, respectively. The light incident surface 111 and the light emergent surface 112 may be opposite surfaces, and the side surface 113 may surround the light incident surface 111 and the light emergent surface 112. The copying lens may include a plane mirror, or may include other types of lenses, such as lenses, which are not limited in this embodiment.

The first lens barrel 12 may have a lens mount on an inner wall thereof, and the first lens 11 may be located in the lens mount. One end of the first lens barrel 12 may have a first light hole, and the light incident surface 111 of the first lens 11 may face the first light hole.

The lens mounting location may have a chute 14 therein. The flash tank 14 may be an annular groove recessed on the inner wall of the first barrel 12, and the flash tank 14 can surround the axis of the first barrel 12. The sealing ring structure 13 may be located between the first lens 11 and the inner wall of the first lens barrel 12, and the sealing ring structure 13 may be respectively abutted with the side surface 113 of the first lens 11 and the inner wall of the first lens barrel 12, where the sealing ring structure 13 may encircle the first light hole.

In the present embodiment, when only the first lens 11 is mounted in the lens mounting position of the first barrel 12, there is a gap between the first lens 11 and the inner wall of the first barrel 12. The sealing ring structure 13 may be an annular sealing structure, and when the sealing ring structure 13 is only placed in the first barrel 12, the sealing ring structure 13 may contact with the inner wall of the first barrel 12, and further, the sealing ring structure 13 may be attached to the inner wall of the first barrel 12. In this way, the sealing ring structure 13 may be located in the gap between the first lens 11 and the inner wall of the first barrel 12, for sealing the gap, and preventing impurities in the external environment from entering the inside of the lens apparatus 10 through the gap between the first lens 11 and the inner wall of the first barrel 12.

And, sealing washer structure 13 part is arranged in the overflow groove 14, and in the in-process of assembling lens device 10, can place sealing washer structure 13 in the inside of first lens cone 12 earlier, and then press first lens 11 into sealing washer structure 13 and deviate from the inboard of first lens cone 12, at this moment, sealing washer structure 13 will take place deformation to a certain extent to make sealing washer structure 13 can with the side 113 of first lens 11 and the inner wall interference fit of first lens cone 12, can improve sealing washer structure 13's leakproofness. In the process of pressing the sealing ring structure 13 by the first lens 11, the sealing ring structure 13 will apply pressure to the first lens 11 due to the mutual action of the forces, and if the pressure applied by the sealing ring structure 13 to the first lens 11 is too large, the first lens 11 will deform or break. Therefore, in this embodiment of the present application, by setting the overflow trough 14 in the lens mounting position of the first lens barrel 12, a part of the structure of the extruded sealing ring structure 13 may be located in the overflow trough 14, so as to reduce the extrusion force of the sealing ring structure 13 on the first lens 11, so as to avoid deformation or breakage caused by the overlarge extrusion force suffered by the first lens 11.

In summary, the embodiments of the present application provide a lens device including a first lens, a first lens barrel, and a sealing ring structure. The first lens is arranged in the lens mounting position of the first lens barrel, the sealing ring structure can be arranged in a gap between the first lens and the inner wall of the first lens barrel, and the sealing ring structure is in interference fit with the first lens and the inner wall of the first lens barrel and is used for sealing the gap, so that impurities in the external environment are prevented from entering the lens device through the gap. And in addition, the extruded sealing ring structure can be partially positioned in the overflow trough during interference fit, so that deformation or breakage caused by overlarge extrusion force applied to the first lens is avoided. The problem of poor sealing performance of the lens device in the related art can be solved, and the sealing effect of the lens device is improved.

It can be appreciated that in the embodiment of the present application, the inner wall of the first lens barrel 12 may be a part of the structure of the lens mounting position, or the inner wall of the first lens barrel 12 may be the lens mounting position. At least part of the sealing ring structure 13 may be clamped between the first lens 11 and the inner wall of the first barrel 12. The first lens 11 is capable of pressing at least part of the sealing ring structure 13 against the inner wall of the first barrel 12. That is, the first lens 11 may apply pressure toward the inner wall of the first lens barrel 12 to press at least part of the sealing ring structure 13 by the inner walls of the first lens 11 and the first lens barrel 12, so that the inner walls of the first lens barrel 12 can clamp the sealing ring structure 13, and thus the inner walls of the first lens barrel 12 can clamp the first lens 11 located in the lens mounting position by the sealing ring structure 13, so that the sealing ring structure 13 can also fix the first lens 11 in the lens mounting position while forming a seal between the first lens 11 and the inner wall of the first lens barrel 12.

In the related art, the lens and the barrel are bonded by the adhesive layer, but the maintainability of the lens device 10 in the related art is poor. For example, when the adhesive layer is aged or the lens is damaged, the lens needs to be removed from the lens barrel, and the lens barrel are adhered by the adhesive layer, so that the disassembly process of the lens is complicated. Or, the bonding layer has longer service time, the aging phenomenon of the bonding layer occurs, the bonding layer needs to be replaced, and the adhesive stain between the lens and the lens barrel needs to be removed in the process of replacing the bonding layer, so that the difficulty of replacing the bonding layer is increased.

In this embodiment, the adhesive layer is not required to be disposed between the first lens 11, the sealing ring structure 13 and the inner wall of the first lens barrel 12, and the first lens 11 and the sealing ring structure 13 can be fixed together in the lens mounting position of the first lens barrel 12 by clamping at least part of the sealing ring structure 13 between the first lens 11 and the inner wall of the first lens barrel 12. In this way, the difficulty of installing or detaching the sealing ring structure 13 can be reduced, so that the first lens 11 or the sealing ring structure 13 can be detached for replacement or maintenance when the first lens 11 or the sealing ring structure 13 is damaged. For example, when the sealing ring structure 13 is damaged, the first lens 11 and the sealing ring structure 13 may be taken out from the first lens barrel 12 to replace the sealing ring structure 13, and after the replacement is completed, the sealing ring structure 13 and the first lens 11 are placed together in the first lens barrel 12, so that the maintenance process of the sealing ring structure 13 may be completed, and the maintenance or replacement difficulty of the sealing ring structure 13 may be made smaller. The problem of the related art that the difficulty of mounting or dismounting the lens and the adhesive layer in the lens device 10 is large can be solved, and the difficulty of mounting or dismounting the lens device 10 is reduced.

In addition, since the overflow groove 14 is provided in the first lens barrel 12, when the first lens 11 compresses the sealing ring structure 13 along the radial direction of the first lens barrel 12, part of the sealing ring structure 13 can be filled into the overflow groove in the compression process, so that the sealing ring structure 13 can be prevented from protruding to the outside of the first lens barrel, and the aesthetic property of the lens device can be improved.

Fig. 4 is a schematic structural view of a first lens barrel 12 according to an embodiment of the present application, and fig. 5 is a schematic structural view of another first lens barrel 12 according to an embodiment of the present application, referring to fig. 4 and 5, the first lens barrel 12 shown in fig. 5 may be a schematic structural view looking at the first lens barrel 12 shown in fig. 4 along a first direction f1 in fig. 4. In an alternative embodiment, the first barrel 12 may include a first tubular housing 121 and a first extension 122, the first tubular housing 121 may have opposite first and second ends, the first extension 122 may be connected with the first end of the first tubular housing 121, and the first extension 122 may extend from the first end of the first tubular housing 121 in a direction close to an axis of the first tubular housing 121.

As shown in fig. 5, the first extension 122 may have an annular structure, and an inner diameter 122a of the first extension 122 may be smaller than an inner diameter 121a of the first tubular housing 121. The extending direction of the first extension 122 may be perpendicular to the axis of the first tubular housing 121. It will be appreciated that only the first extension 122 is pattern-filled in fig. 5 in order to more clearly distinguish the first extension 122 from the first tubular housing 121.

One end of the seal ring structure 13 may abut against the first extension 122, and the inner diameter 121a of the first tubular housing 121 may gradually increase in a direction toward the first end of the first tubular housing 121 along the second end of the first tubular housing 121.

That is, the first lens 11 may compress the sealing ring structure 13 against the first extension 122 to improve the tightness and stability of the connection between the sealing ring structure 13 and the first extension 122.

The inner diameter 121a of the first tubular housing 121 gradually decreases and increases in the axial direction of the first tubular housing 121 in the direction of the second end of the first tubular housing 121 toward the first extension 122, that is, the inner diameter of the second end of the first tubular housing 121 may be smaller than the inner diameter of the first end. In this way, after the sealing ring structure 13 is pressed on the inner wall of the first lens barrel 12 by the first lens 11, the inner diameter 121a of the first tubular housing 121 that gradually changes can make the sealing ring structure 13 and the first lens 11 located inside the first tubular housing 121 difficult to be separated from the inside of the first tubular housing 121, so that the stability of the connection among the first lens 11, the sealing ring structure 13 and the first lens barrel 12 can be improved.

Referring to fig. 4, in an exemplary embodiment, the included angle α between the generatrix L1 of the inner wall of the first tubular housing 121 and the axis S1 of the first tubular housing 121 may be 2 degrees to 7 degrees. In this range, the connection between the first lens 11, the sealing ring structure 13 and the first lens barrel 12 is stable, and the influence of the smaller inner diameter of the second end of the first tubular housing 121 on the entering of the first lens 11 into the first lens barrel 12 can be avoided, and the phenomenon of the non-tight fitting between the sealing ring and the first lens barrel 12 caused by the larger inner diameter of the first end of the first tubular housing 121 can also be avoided. The generatrix L1 is a line of curvature forming the inner wall of the first tubular housing 121, that is, the curved surface may be regarded as a locus when the line of curvature moves, and the inner wall of the first tubular housing 121 may be regarded as a locus of movement of the generatrix L1. Illustratively, the front view of the inner wall of the first tubular housing 121 is an isosceles trapezoid, the waists of which may be referred to as the generatrix L1 of the inner wall of the first tubular housing 121. Illustratively, the generatrix of the inner wall of the first tubular housing 121 is at an angle of 3 degrees to the axis of the first tubular housing 121.

In fig. 4, for convenience of illustration, an angle α between the generatrix L1 and the axis S1 is illustrated, and the angle α between the generatrix L1 and the straight line S2 is illustrated, wherein the straight line S2 is parallel to the axis S1.

Fig. 6 is a schematic structural diagram of a seal ring structure 13 provided in the embodiment of the present application, and fig. 7 is a schematic structural diagram of another lens apparatus 10 provided in the embodiment of the present application, referring to fig. 6 and fig. 7, in an alternative implementation manner, the seal ring structure 13 may include an annular first seal ring 131 and an annular second seal ring 132, and the first seal ring 131 and the second seal ring 132 may be arranged along an axial direction of the first lens barrel 12. The overflow chute 14 may include an annular first groove 141 and an annular second groove 142, the first groove 141 and the second groove 142 may be arranged along an axial direction of the first barrel 12, and the first groove 141 and the second groove 142 may each encircle an axis of the first barrel 12.

The first sealing ring 131 and the second sealing ring 132 may be both located between the side surface 113 of the first lens 11 and the inner wall of the first barrel 12, and the first sealing ring 131 is partially located in the first groove 141, and the second sealing ring 132 is partially located in the second groove 142.

In the assembly process of the lens apparatus 10, the first sealing ring 131 and the second sealing ring 132 may be placed on the inner side of the first barrel 12, and the first sealing ring 131 may be located on the outer side of the first groove 141, and the second sealing ring 132 may be located on the outer side of the second groove 142. The first lens 11 is pressed into the inner sides of the first sealing ring 131 and the second sealing ring 132, which are away from the first lens barrel 12, at this time, the first lens 11 can apply pressure on the first sealing ring 131 and the second sealing ring 132, so that the first sealing ring 131 and the second sealing ring 132 are in interference fit with the side surface 113 of the first lens 11 and the inner wall of the first lens barrel 12.

In this way, the first sealing ring 131 and the second sealing ring 132 which are arranged along the axial direction of the first lens barrel 12 can be arranged, so that the first sealing ring 131 extruded during interference fit can be partially located in the first groove 141, the second sealing ring 132 extruded can be partially located in the second groove 142, and the uniformity of the pressure applied to the side surface 113 of the first lens 11 and the sealing ring structure 13 can be improved, so that deformation or breakage caused by overlarge extrusion force applied to the first lens 11 can be further avoided.

Fig. 8 is a schematic structural diagram of another seal ring structure 13 according to an embodiment of the present application, referring to fig. 8, alternatively, the seal ring structure 13 has an inner wall 133 and a first annular surface 134, and the first annular surface 134 is located at an end of the seal ring structure 13 away from the first extension portion 122 of the first lens barrel 12. The junction of the inner wall 133 and the first annular surface 134 of the seal ring structure 13 has a chamfer structure 135. In this way, when the first lens 11 is pressed into the first lens barrel 12 equipped with the sealing ring structure 13, the chamfer structure 135 can facilitate the first lens 11 to enter the inner side of the sealing ring structure 13 away from the first lens barrel 12, and the installation difficulty of the lens device can be reduced.

Referring to fig. 8, in an exemplary embodiment, the angle e between the chamfer structure 135 and the axis of the first barrel 12 ranges from 30 degrees to 60 degrees. Within this range, the first lens 11 can be pressed into the inside of the sealing ring structure 13 relatively easily. Illustratively, the chamfer 135 is at an angle of 45 degrees to the axis of the first barrel 12. In fig. 8, for convenience of illustrating an angle e between the chamfer structure 135 and the axis of the first barrel 12, an angle e between an extension line L3 of the chamfer structure 135 and a straight line S2 is illustrated, wherein the straight line S2 is parallel to the axis of the first barrel 12.

Fig. 9 is a schematic structural view of another first lens barrel 12 provided in the embodiment of the present application, fig. 10 is a schematic structural view of another lens apparatus 10 provided in the embodiment of the present application, and fig. 11 is a schematic structural view of another first lens barrel 12 provided in the embodiment of the present application, please refer to fig. 9, fig. 10 and fig. 11, wherein the first lens barrel 12 shown in fig. 11 may be a schematic structural view looking into the first lens barrel 12 shown in fig. 9 along a first direction f1 in fig. 9. In an alternative embodiment, the first barrel 12 may have a second extension 123, the second extension 123 may be connected with the second end of the first tubular housing 121, and the second extension 123 may extend from the second end of the first tubular housing 121 in a direction close to the axis of the first tubular housing 121.

As shown in fig. 11, the second extension 123 may have an annular structure, an inner diameter 123a of the second extension 123 may be smaller than an inner diameter 121a of the first tubular housing 121, and the inner diameter 123a of the second extension 123 may be greater than the inner diameter 122a of the first extension 122. The extending direction of the second extending portion 123 may be perpendicular to the axis of the first tubular housing 121. It will be appreciated that only the second extension 123 is pattern-filled in fig. 11 in order to more clearly distinguish the first extension 122, the second extension 123 and the first tubular housing 121.

Fig. 12 is a schematic structural diagram of another first lens barrel 12 and a sealing ring structure 13 provided in the embodiment of the present application, please refer to fig. 12, wherein the first lens barrel 12 shown in fig. 12 may be a schematic structural diagram of the first lens barrel 12 and the sealing ring structure 13 shown in fig. 10 viewed along a first direction f1 in fig. 10. One end of the sealing ring structure 13 facing away from the first extension portion 122 may abut against the second extension portion 123, and in a radial direction of the first lens barrel 12, a distance b1 between an edge of the second extension portion 123, which is close to the axis line side of the first lens barrel 12, and an inner wall of the first tubular housing 121 may be smaller than a distance b2 between the inner wall of the sealing ring structure 13 and the inner wall of the first tubular housing. It will be appreciated that only the second extension 123 and the sealing ring structure 13 are pattern-filled in fig. 12 in order to more clearly distinguish between the first extension 122, the second extension 123, the first tubular housing 121 and the sealing ring structure 13.

In this way, the second extension 123 may be used to further fix the sealing ring structure 13, so as to improve the stability of the sealing ring structure 13 in the first lens barrel 12, and also avoid the impact of the second extension 123 on the pressing of the first lens 11 into the inner side of the sealing ring structure 13.

In other words, the sealing ring structure 13 and the second extension 123 may both be ring-shaped structures, and the ring width of the second extension 123 in the radial direction of the first barrel 12 may be smaller than the ring width of the sealing ring structure 13 in the radial direction of the first barrel 12.

Fig. 13 is a schematic structural view of a second lens barrel 15 provided in the embodiment of the present application, and fig. 14 is a schematic structural view of another lens apparatus 10 provided in the embodiment of the present application, referring to fig. 13 and 14, in an alternative implementation manner, the lens apparatus 10 may further include the second lens barrel 15, the second lens barrel 15 may include a second tubular housing 151 and an annular pressure-bonding structure 152, and the annular pressure-bonding structure 152 may be located inside the second tubular housing 151 and connected with an inner wall of the second tubular housing 151. The second lens barrel 15 may be fixedly connected to the second end of the first tubular housing 121, and the pressing structure 152 abuts against an edge of the light emitting surface 112 of the first lens 11.

The press-connection structure 152 can be used to fix the first lens 11, so as to prevent the first lens 11 from being separated from the lens mounting position of the first lens barrel 12 after being subjected to external pressure.

Fig. 15 is a schematic structural diagram of another lens apparatus 10 according to an embodiment of the present application, referring to fig. 15, in an alternative embodiment, an outer wall of the first tubular housing 121 may be attached to an inner wall of the second tubular housing 151. The outer wall of the first tubular housing 121 has an annular clamping groove 1211 surrounding the first tubular housing 121. The lens device 10 may further include a sealing ring 16, the sealing ring 16 being located in the annular clamping groove 1211, and the sealing ring 16 may be in contact with an inner wall of the second tubular housing 151. The sealing ring 16 can seal the gap between the outer wall of the first tubular housing 121 and the inner wall of the second tubular housing 151, so that external moisture can be prevented from entering the inside of the lens device from the junction of the outer wall of the first tubular housing 121 and the second tubular housing 151.

In an exemplary embodiment, the material of the seal ring structure may include at least one of nitrile rubber, silica gel, fluorine rubber, ethylene propylene rubber, and plastic. The cross-sectional shape of the overflow trough may comprise at least one of triangular, rectangular and trapezoidal. The lens device may include a plurality of lenses, for example, the plurality of lenses may include a first lens, a second lens and a third lens that are arranged along an axial direction of the first lens barrel, the first lens may be a window lens, the second lens and the third lens may be located in the second lens barrel, and a sealing structure of the second lens and the third lens may refer to a sealing structure of the first lens.

In summary, the embodiments of the present application provide a lens device including a first lens, a first lens barrel, and a sealing ring structure. The first lens is arranged in the lens mounting position of the first lens barrel, the sealing ring structure can be arranged in a gap between the first lens and the inner wall of the first lens barrel, and the sealing ring structure is in interference fit with the first lens and the inner wall of the first lens barrel and is used for sealing the gap, so that impurities in the external environment are prevented from entering the lens device through the gap. And in addition, the extruded sealing ring structure can be partially positioned in the overflow trough during interference fit, so that deformation or breakage caused by overlarge extrusion force applied to the first lens is avoided. The problem of poor sealing performance of the lens device in the related art can be solved, and the sealing effect of the lens device is improved.

In addition, the embodiment of the application also provides an endoscope, which can comprise the lens device in any embodiment. The lens device in the embodiment of the application can also be applied to other image pickup apparatuses such as a video camera.

The term "at least one of a and B" in this application is merely an association relationship describing an association object, and means that three relationships may exist, for example, at least one of a and B may mean: a exists alone, A and B exist together, and B exists alone. Similarly, "at least one of A, B and C" means that there may be seven relationships, which may be represented: there are seven cases where a alone, B alone, C alone, a and B together, a and C together, C and B together, A, B and C together. Similarly, "at least one of A, B, C and D" means that there may be fifteen relationships, which may be represented: there are fifteen cases where a alone, B alone, C alone, D alone, a and B together, a and C together, a and D together, C and B together, D and B together, C and D together, A, B and C together, A, B and D together, A, C and D together, B, C and D together, A, B, C and D together.

In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless explicitly defined otherwise.

The foregoing description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the utility model, since it is intended that all modifications, equivalents, improvements, etc. that fall within the spirit and scope of the utility model.

Claims (10)

1. The lens device is characterized by comprising a first lens, a first lens barrel and a sealing ring structure;

the first lens comprises a light incident surface, a light emergent surface and a side surface, and the side surface is respectively connected with the light incident surface and the light emergent surface;

a lens mounting position is arranged on the inner wall of the first lens barrel, the first lens is positioned in the lens mounting position, and a material overflow groove is arranged in the lens mounting position;

the sealing ring structure is positioned between the first lens and the inner wall of the first lens cone, and is respectively abutted with the side surface of the first lens and the inner wall of the first lens cone, and the sealing ring structure is partially positioned in the flash groove.

2. The lens apparatus according to claim 1, wherein the first barrel includes a first tubular housing having opposite first and second ends, and a first extension connected to the first end of the first tubular housing, and extending from the first end of the first tubular housing in a direction approaching an axis of the first tubular housing;

one end of the sealing ring structure is abutted with the first extension part, and the inner diameter of the first tubular shell gradually increases along the direction from the second end of the first tubular shell to the first end of the first tubular shell.

3. The lens device according to claim 2, wherein an included angle between a bus bar of an inner wall of the first tubular housing and an axis of the first tubular housing is in a range of 2 degrees to 7 degrees.

4. The lens apparatus according to claim 1, wherein the seal ring structure includes a ring-shaped first seal ring and a ring-shaped second seal ring, the first seal ring and the second seal ring being arranged in an axial direction of the first barrel;

the flash groove comprises an annular first groove and an annular second groove, the first groove and the second groove are distributed along the axial direction of the first lens barrel, and the first groove and the second groove encircle the axial line of the first lens barrel;

the first sealing ring and the second sealing ring are both positioned between the side surface of the first lens and the inner wall of the first lens cone, the first sealing ring part is positioned in the first groove, and the second sealing ring part is positioned in the second groove.

5. The lens device of claim 2, wherein the sealing ring structure has a connected inner wall and a first annular surface, the first annular surface being located at an end of the sealing ring structure remote from the first extension;

the junction of the inner wall of the sealing ring structure and the first annular surface is provided with a chamfer structure.

6. The lens apparatus according to claim 5, wherein an included angle between the chamfer structure and an axis of the first barrel ranges from 30 degrees to 60 degrees.

7. The lens apparatus according to claim 2, wherein the first barrel has a second extension portion connected to the second end of the first tubular housing, and the second extension portion extends from the second end of the first tubular housing in a direction approaching an axis of the first tubular housing;

one end of the sealing ring structure, which is away from the first extension part, is abutted with the second extension part, and in the radial direction of the first lens barrel, the distance between the edge of the second extension part, which is close to one side of the axis of the first lens barrel, and the inner wall of the first tubular shell is smaller than the distance between the inner wall of the sealing ring structure and the inner wall of the first tubular shell.

8. The lens device according to claim 2, further comprising a second barrel including a second tubular housing and an annular crimp structure located inside the second tubular housing and connected to an inner wall of the second tubular housing;

the second lens cone is fixedly connected with the second end of the first tubular shell, and the compression joint structure is abutted to the edge of the light emergent surface of the first lens.

9. The lens device according to claim 8, wherein an outer wall of the first tubular housing is fitted with an inner wall of the second tubular housing;

the outer wall of the first tubular shell is provided with an annular clamping groove surrounding the first tubular shell;

the lens device further comprises a sealing ring, wherein the sealing ring is located in the annular clamping groove, and the sealing ring is in contact with the inner wall of the second tubular shell.

10. An endoscope, characterized in that it comprises a lens device according to any one of claims 1-9.