Light source device and endoscope system

Abstract

The utility model relates to a light source device and an endoscope system. The light source device comprises a light cylinder, a light guide ring and a light source module, the light barrel is a shading piece, the first end of the light barrel in the axial direction is used for being connected with an imaging device, and the second end of the light barrel in the axial direction is used for being connected with a sleeve; the light guide ring is arranged in the light cylinder, and the included angle between the axis of the light guide ring and the axis of the light cylinder is zero, acute or obtuse; the inner side face of the light guide ring is covered with a first light shielding layer. The light source module is connected to the light cylinder and used for projecting light rays to the light guide ring, so that the light rays can enter the light guide ring and are emitted out from the end face, away from the first end, of the light guide ring. When the light is emitted from the end face of the light guide ring, an annular light spot can be formed, and when the annular light spot irradiates the target area, the problem of overexposure of the target area at the center position can be avoided, and the situation that a large shadow is generated around can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment and relates to a light source device and an endoscope system. Background Art

[0002] The endoscope system mainly includes a light source device and an imaging device. When in use, the light source device needs to be used to project light onto the target area.

[0003] However, in the prior art, the light emitted by the light source device easily causes overexposure at the center of the target area, thereby adversely affecting the imaging of the imaging device. Utility Model Content

[0004] The technical problem to be solved by the present invention is: in view of the problem in the existing endoscope system that the light emitted by the light source device easily causes overexposure of the target area at the center position, a light source device and an endoscope system are provided.

[0005] In order to solve the above technical problems, an embodiment of the present utility model provides a light source device, including a light tube, a light guide ring and a light source module; the light tube is a light-shielding member, the first axial end of the light tube is used to connect to the imaging device, and the second axial end of the light tube is used to connect to the sleeve; the light guide ring is arranged in the light tube, and the angle between the axis of the light guide ring and the axis of the light tube is zero, an acute angle or an obtuse angle; the inner side surface of the light guide ring is covered with a first light-shielding layer; the light source module is connected to the light tube and is used to project light onto the light guide ring, so that the light can enter the light guide ring and be emitted from the end face of the light guide ring away from the first end.

[0006] Optionally, the outer surface of the light guide ring is covered with a second light shading layer, and the end surface of the light guide ring close to the first end is covered with a third light shading layer; a first light-transmitting area is provided on the second light-transmitting layer and / or the third light-transmitting layer; and the light emitted by the light source module can enter the light guide ring from the first light-transmitting area.

[0007] Optionally, the second light-shielding layer is the side wall of the light tube, and the inner side surface of the light tube is in contact with the outer side surface of the light guide ring; in the axial direction of the light tube, the light guide ring is completely located inside the light tube; the first light-transmitting area is arranged on the light tube and is opposite to the outer side surface of the light guide ring; the light source module is located outside the light tube and can project light from the first light-transmitting area to the light guide ring.

[0008] Optionally, the light source module includes a light-containing part and a light source assembly, and the light-containing part and the light source assembly are both connected to the light tube; the light-containing part has a light-containing cavity, a second light-transmitting area and a third light-transmitting area; the light source assembly is located on the outside of the light-containing part and is opposite to the second light-transmitting area, so that the light emitted by the light source assembly can enter the light-containing cavity from the second light-transmitting area; the third light-transmitting area is opposite to the first light-transmitting area, so that the light in the light-containing cavity can be projected from the third light-transmitting area to the first light-transmitting area, so as to be projected onto the light-guiding ring.

[0009] Optionally, the light source assembly is sealed and connected to the light containing member to block external light from entering the light containing cavity from the second light-transmitting area; and / or, the light containing member is sealed and connected to the light tube and blocks the first light-transmitting area to block external light from entering the light-guiding ring from the first light-transmitting area; and / or, the first light-shielding layer completely covers the inner side surface of the light-guiding ring.

[0010] Optionally, the light source assembly includes a light source, a lens barrel and a lens group; the lens barrel is connected to the light-containing member; the light source is connected to the lens barrel and is used to project light into the lens barrel; the lens group is arranged in the lens barrel and is located between the light source and the light-containing member; the lens group is used to focus the light emitted by the light source and project the focused light onto the second light-transmitting area; the light source device also includes a mounting base, which is connected to the first end and is used to install an imaging device; the mounting base is sealed with an end of the lens barrel facing away from the light-containing member to block external light from entering the lens barrel; the mounting base is detachably connected to the light barrel, and the mounting base is detachably connected to the lens barrel.

[0011] Optionally, the light tube is provided with a first through hole extending from the outer side surface of the light tube to the inner side surface of the light tube, and the first through hole constitutes the first light-transmitting area; the outer side surface of the light-guiding ring closes the opening formed by the first through hole on the inner side surface of the light tube; and / or, the light-containing member is provided with a second through hole extending from the outer surface of the light-containing member to connect with the light-containing cavity, and the second through hole constitutes the second light-transmitting area; and / or, the light-containing member is provided with a third through hole extending from the outer surface of the light-containing member to connect with the light-containing cavity, and the third through hole constitutes the third light-transmitting area.

[0012] Optionally, the light tube has a accommodating hole, which passes through the light tube in the axial direction of the light tube; in the axial direction of the light tube, the accommodating hole includes a first hole and a second hole connected in sequence, and the diameter of the first hole is smaller than the diameter of the second hole, so as to form a step surface between the first hole and the second hole; the light guide ring is arranged in the second hole; the third light-shielding layer is the side wall of the light tube, and the step surface covers the end face of the light guide ring close to the first end; in the axial direction of the accommodating hole, the end face of the light guide ring close to the first end is staggered with the first hole.

[0013] In order to solve the above technical problems, an embodiment of the present invention also provides an endoscope system, characterized in that it includes an imaging device, a sleeve and a light source device described in any one of the above items; the imaging device is connected to the first end, the sleeve is connected to the second end, and the lens of the imaging device is arranged in the sleeve; the sleeve is a light guide member, and the end face of the sleeve connected to the light tube has a first area opposite to the end face of the light guide ring away from the first end, and the first area surrounds the outside of the lens; the inner side surface of the sleeve is covered with a fourth light-shielding layer, and the outer side surface of the sleeve is covered with a fifth light-shielding layer to prevent light from leaking from the side wall of the sleeve.

[0014] Optionally, the brightness of the light emitted by the light source device is adjustable; and / or the fourth shading layer completely covers the inner side of the sleeve; and / or the fifth shading layer completely covers the outer side of the sleeve.

[0015] In the light source device and endoscope system provided by the embodiments of the present invention, when light is emitted from the end face of the light guide ring, an annular light spot can be formed. When the annular light spot is irradiated to the target area, the problem of overexposure of the target area in the center position can be avoided, and the situation of generating large shadows around can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the light source device provided by an embodiment of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the light source device provided by an embodiment of the present invention. Figure 2 ;

[0018] Figure 3 yes Figure 2 Sectional view in the AA direction;

[0019] Figure 4 This is a schematic diagram of the structure of the light source device provided by an embodiment of the present invention. Figure 3 ;

[0020] Figure 5 This is a schematic diagram of the connection between the light tube and the sleeve of the light source device provided by one embodiment of the present invention.

[0021] The reference numerals in the specification are as follows:

[0022] 10. Light source device;

[0023] 1. Light tube; 11. First end; 12. Second end; 13. Second inner side surface; 14. Second outer side surface; 15. Accommodation hole; 151. First hole; 152. Second hole; 153. Step surface;

[0024] 2. Light guide ring; 21. First inner side surface; 22. First end surface; 23. First outer side surface; 24. Second end surface; 25. First ring hole;

[0025] 3. Light source module; 31. Light receiving element; 311. Light receiving cavity; 312. Second light-transmitting area; 313. Third light-transmitting area; 314. Annular sidewall; 315. Second end cap; 32. Light source assembly; 321. Light source; 322. Lens barrel; 323. Lens assembly; 324. Mounting hole; 325. Circuit board; 326. Light-emitting lamp;

[0026] 4. The first light-transmitting area;

[0027] 5. Mounting seat;

[0028] 20. Sleeve; 201. Third inner side surface; 202. Third outer side surface; 203. Third end surface;

[0029] 30. Connectors. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] like Figures 1 to 5As shown, in one embodiment, the light source device 10 includes a light tube 1, a light guide ring 2 and a light source module 3; the light tube 1 is a light-shielding member, the first axial end 11 of the light tube 1 is used to connect to the imaging device, and the second axial end 12 of the light tube 1 is used to connect to the sleeve 20; the light guide ring 2 is arranged in the light tube 1, and the angle between the axis of the light guide ring 2 and the axis of the light tube 1 is zero, an acute angle or an obtuse angle; the inner side surface of the light guide ring 2 (the inner side surface of the light guide ring 2 is defined as the first inner side surface 21) is covered with a first light-shielding layer to prevent light from passing through the first inner side surface 21; the light source module 3 is connected to the light tube 1 and is used to project light to the light guide ring 2, so that the light can enter the light guide ring 2 and be emitted from the end surface of the light guide ring 2 away from the first end 11 (the end surface of the light guide ring 2 is defined as the first end surface 22).

[0032] The first inner side surface 21 and the outer side surface of the light guide ring 2 (defined as the first outer side surface 23) are both radial surfaces of the light guide ring 2. The first end surface 22 and, later described, the second end surface 24 are both axial surfaces of the light guide ring 2. After light from the light source 321 enters the light guide ring 2, it can be dispersed and propagated within the light guide ring 2. Furthermore, the first end 11 and the second end 12 are opposite ends of the light cylinder 1 along its axial direction.

[0033] Because the first inner side surface 21 of the light guide ring 2 is provided with a first light-blocking layer, light cannot enter the annular ring of the light guide ring 2 (the annular ring of the light guide ring 2 is defined as the first annular ring 25). The first annular ring 25 is formed by the first inner side surface 21, which means that light within the light guide ring 2 cannot pass through the first inner side surface 21. Furthermore, as used herein, "light entering the light guide ring 2" refers to light entering the area between the first inner side surface 21 and the first outer side surface 23. Furthermore, the axis of the light guide ring 2 is the axis of the first annular ring 25, and the radial direction of the light guide ring 2 is the radial direction of the first annular ring 25.

[0034] In this embodiment, when light is emitted from the first end surface 22, an annular light spot can be formed. When the annular light spot is irradiated to the target area, the problem of overexposure of the target area at the center of the light spot can be avoided, and the situation of generating large shadows around it can be avoided.

[0035] In addition, the first light-shielding layer can be a coating applied to the first inner side surface 21, such as an ink layer. Of course, the first light-shielding layer can also be an object disposed in the first ring hole 25 and covering the first inner side surface 12, and the object and the first inner side surface 12 can only be in contact but not fixed together.

[0036] In addition, the first light shielding layer may completely cover the first inner side surface 21 , so that all areas of the first inner side surface 21 are not light-transmissive.

[0037] It should be noted that light tube 1 is a light-blocking member, meaning that light cannot pass through its surface and enter the interior of light tube 1. For example, light cannot pass through the inner side surface of light tube 1 (defined as second inner side surface 13), nor through the outer side surface of light tube 1 (defined as second outer side surface 14). Furthermore, light cannot pass through the end surfaces of first end 11 or second end 12. Light tube 1 can be made of an opaque material; alternatively, it can be made of a translucent material but have a light-blocking layer applied to its surface.

[0038] like Figure 3 and Figure 4 As shown, in one embodiment, the light tube 1 has a receiving hole 15 that penetrates the light tube 1 along its axial direction. The second inner side surface 13 of the light tube 1 is the surface that encloses and forms the receiving hole 15. The light guide ring 2 is installed in the receiving hole 15.

[0039] In one embodiment, the receiving hole 15 is a circular hole, and the light guide ring 2 is a circular ring.

[0040] In one embodiment, the light cylinder 1 and the light guide ring 2 may be coaxially arranged.

[0041] In one embodiment, the first outer side surface 23 is covered with a second light-shielding layer, and the end surface of the light-guiding ring 2 close to the first end 11 (this end surface of the light-guiding ring 2 is defined as the second end surface 24) is covered with a third light-shielding layer; a first light-transmitting area 4 is provided on the second light-shielding layer and / or the third light-shielding layer; and light emitted by the light source module 3 can enter the light-guiding ring 2 from the first light-transmitting area 4.

[0042] When the first light-transmitting region 4 is disposed on the second light-shielding layer, all areas of the first outer side surface 23 except the area opposite the first light-transmitting region 4 are covered by the second light-shielding layer, rendering all areas of the first outer side surface 23, except the area opposite the first light-transmitting region 4, light-impermeable. Furthermore, the third light-shielding layer completely covers the second end surface 24, rendering all areas of the second end surface 24 light-impermeable.

[0043] When the first light-transmitting area 4 is disposed on the third light-shielding layer, the third light-shielding layer covers all areas of the second end surface 24 except for the area of ​​the first outer side surface 23 that faces the first light-transmitting area 4, rendering all areas of the first outer side surface 23 opaque except for the area facing the first light-transmitting area 4. Furthermore, the second light-shielding layer completely covers the first outer side surface 23, rendering all areas of the first outer side surface 23 opaque.

[0044] In one embodiment, the second light-shielding layer is the sidewall of the light tube 1, which includes a second inner side surface 13, a second outer side surface 14, and the portion of the structure located between the second inner side surface 13 and the second outer side surface 14. The inner side surface of the light tube 1 (i.e., the second inner side surface 13) is aligned with the first outer side surface 23. The light guide ring 2 is completely located within the light tube 1 in the axial direction of the light tube 1. The first light-transmitting area 4 is provided on the light tube 1, opposite the first outer side surface 23. The light source module 3 is located outside the light tube 1 and is capable of projecting light from the first light-transmitting area 4 to the light guide ring 2. Both the outer side surface and the inner side surface of the light tube 1 refer to radial surfaces thereof.

[0045] That is, the light emitted by the light source module 3 can enter the receiving hole 15 from outside the light cylinder 1 at the first light transmission area 4, and then enter the light guide ring 2 from the area opposite to the first light transmission area 4.

[0046] In addition, the light source module 3 being located outside the light tube 1 may mean that the light source module 3 is located outside the light tube 1 and connected to the second outer side surface 14 .

[0047] In the axial direction of the light tube 1 , the light guide ring 2 is completely located in the light tube 1 , which may mean that in the axial direction of the light tube 1 , both ends of the light guide ring 2 do not protrude from the accommodating hole 15 .

[0048] In one embodiment, the light tube 1 is provided with a first through hole extending from the outer side surface of the light tube 1 to the inner side surface of the light tube 1. The first through hole constitutes a first light-transmitting area. That is, the first light-transmitting area 4 can be a through hole extending through the light tube 1. In addition, the first outer side surface 23 can be exposed through the first through hole.

[0049] The opening formed on the inner side surface of the light tube 1 by the first outer side surface 23 closing the first through hole is defined as the first opening. The first light-transmitting area 4 relative to the first outer side surface 23 can mean that: the edge of the first opening (the edge of the first opening is the circular coil) is in contact with the first outer side surface, and in an orthographic projection of a plane perpendicular to the first through hole, the projection of the first opening coincides with the projection of the first outer side surface 23.

[0050] Furthermore, the first outer surface 23 closes the opening formed by the first through hole on the inner surface of the light tube 1. At this time, the edge areas around the first opening are in contact with the first outer surface 23, which can prevent the light emitted by the light source module 3 from being transmitted from the first through hole to places outside the area where the light guide ring 2 is located.

[0051] like Figure 4As shown, in one embodiment, the light source module 3 includes a light receiving member 31 and a light source assembly 32, both of which are connected to the light tube 1; the light receiving member 31 has a light receiving cavity 311, a second light-transmitting area 312 and a third light-transmitting area 313; the light source assembly 32 is located on the outside of the light receiving member 31 and is opposite to the second light-transmitting area 312, so that the light emitted by the light source assembly 32 can enter the light receiving cavity 311 from the second light-transmitting area 312; the third light-transmitting area 313 is opposite to the first light-transmitting area 4, so that the light in the light receiving cavity 311 can be projected from the third light-transmitting area 313 to the first light-transmitting area 4, so as to be projected to the light guide ring 2.

[0052] In this embodiment, after light emitted by the light source assembly 32 enters the light receiving cavity 311 from the second light-transmitting area 312, it is reflected within the light receiving cavity 311 until it is able to be emitted from the third light-transmitting area 313. This prevents excessive concentration of light, allowing the light to be more dispersed after entering the light guide ring 2, thereby making the brightness of each area of ​​the annular light spot more uniform.

[0053] The second light-transmitting area 312 and the third light-transmitting area 313 are staggered so that light cannot be directly emitted from the third light-transmitting area 313 after entering the light-containing cavity 311 from the second light-transmitting area 312 . This allows light to enter the light-guiding ring 2 in a more dispersed manner.

[0054] In one embodiment, the light source assembly 32 is sealedly connected to the light receiving member 31 to block external light from entering the light receiving cavity 311 via the second light-transmitting region 312; and / or, the light receiving member 31 is sealedly connected to the light tube 1 and blocks the first light-transmitting region 4 to block external light from entering the light guide ring 2 via the first light-transmitting region 4. Specifically, the area where the light receiving member 31 is connected to the light source assembly 32 surrounds the outside of the second light-transmitting region 312, thereby preventing external light from entering the light receiving cavity 311 via the light source assembly 32. Furthermore, the area where the light tube 1 is connected to the light receiving member 31 surrounds the outside of the first light-transmitting region 4, thereby preventing external light from entering the light guide ring 2 via the first light-transmitting region 4.

[0055] The sealed connection between the light source assembly 32 and the light containing member 31 may mean that the light containing member 31 contacts the light source assembly 32 , and the area where the light containing member 31 contacts the light source assembly 32 is a closed loop area, and the closed loop area surrounds the outside of the second light-transmitting area 312 .

[0056] The light containing member 31 is sealedly connected to the light tube 1 and blocks the first light transmitting area 4 , which may mean that the light tube 1 contacts the light containing member 31 , and the area where the light tube 1 contacts the light containing member 31 is a closed loop area, and the closed loop area surrounds the outside of the first light transmitting area 4 .

[0057] In one embodiment, the light receiving member 31 is provided with a second through hole extending from the outer surface of the light receiving member 31 to communicate with the light receiving cavity 311. The second through hole is referred to as the second light-transmitting area 312. Specifically, the second light-transmitting area 312 is a second through hole extending from the outer surface of the light receiving member 31 to the inner surface of the light receiving member 31. The outer surface of the light receiving member 31 is used to enclose the light receiving cavity 311.

[0058] The light receiving member 31 is provided with a third through hole extending from the outer surface of the light receiving member 31 to communicate with the light receiving cavity 311. The third through hole constitutes a third light-transmitting area 313. That is, the third light-transmitting area 313 is a third through hole that extends from the outer surface of the light receiving member 31 to the inner surface of the light receiving member 31.

[0059] At this time, the second light-transmitting area 312 and the third light-transmitting area 313 are staggered, which may refer to an area where the orthographic projection of the second through hole and the orthographic projection of the third through hole do not overlap in the orthographic projection along the plane perpendicular to the axis of the second through hole.

[0060] In one embodiment, the axis of the second through hole and the axis of the third through hole may be arranged perpendicularly.

[0061] like Figure 3 As shown, in one embodiment, the light-containing member 31 includes an annular sidewall 314 surrounding the outer side of the accommodating cavity and end caps connected to both ends of the annular sidewall 314. The two end caps are defined as a first end cap and a second end cap 315. The second light-transmitting area 312 can be provided on the annular sidewall 314, and the third light-transmitting area 313 can be provided on the first end cap. In addition, the first end cap is connected to the second outer side surface 14.

[0062] When the third light-transmitting area 313 is a third through hole, the third through hole extends through the first end cap. In an orthographic projection of a plane perpendicular to the length of the accommodating cavity (i.e., the axial direction of the third through hole), the projection of the light-accommodating cavity 311 and the projection of the first end cap do not overlap. In this case, the light-accommodating element 31 can be considered as not having the first end cap.

[0063] In addition, the light-receiving cavity 311 can be a circular hole or a hole of other shapes. The second through hole and the third through hole can also be circular holes or holes of other shapes.

[0064] When the third light-transmitting area 313 is a third through hole, the third light-transmitting area 313 is opposite to the first light-transmitting area 4, which may mean that: in the orthographic projection of a plane perpendicular to the axial direction of the third through hole, the orthographic projection of the third through hole and the orthographic projection of the first light-transmitting area 4 have an overlapping area.

[0065] Furthermore, in an orthographic projection of a plane perpendicular to the axial direction of the third through hole, the orthographic projection of the third through hole completely covers the orthographic projection of the first light-transmitting area 4, thereby preventing external light from entering the light-guiding ring 2 from the first light-transmitting area 4. In this case, the annular sidewall 314 can surround the outside of the first light-transmitting area 4.

[0066] In addition, when the first light-transmitting region 4 is a first through hole and the third light-transmitting region 313 is a third through hole, the axis of the first through hole and the axis of the third through hole can be arranged parallel to each other. In this case, the diameter of the third through hole can be larger than the diameter of the first through hole. After assembly, the first through hole and the third through hole can be arranged coaxially.

[0067] like Figure 4 As shown, in one embodiment, the light source assembly 32 includes a light source 321, a lens barrel 322, and a lens group 323. The lens barrel 322 is connected to the light receiving member 31. The light source 321 is connected to the lens barrel 322 and is used to project light into the lens barrel 322. The lens group 323 is disposed within the lens barrel 322 and located between the light source 321 and the light receiving member 31. The lens group 323 is used to focus the light emitted by the light source 321 and project the focused light into the second light-transmitting area 312. This allows as much light as possible from the light source 321 to be transmitted from the second light-transmitting area 312 to the light receiving cavity 311.

[0068] Lens assembly 323 may include one or more lenses, which may be convex lenses. When there are multiple lenses, each lens is arranged sequentially along the axial direction of lens barrel 322. "Multiple" means greater than or equal to two, and the term "multiple" has the same meaning in all embodiments. Furthermore, the configuration of lens assembly 323 may be based on existing techniques, and its specific configuration may be selected based on actual needs. This embodiment will not be further described here.

[0069] After assembly, the lens and lens barrel 322 may be coaxially arranged. Specifically, the lens has a mounting hole 324 that extends through the lens barrel 322, and the lens in the lens assembly 323 is mounted within the mounting hole 324. Furthermore, the lens and lens barrel 322 being coaxially arranged may refer to the lens being coaxially arranged with the mounting hole 324. The axis of the mounting hole 324 is the axis of the lens barrel 322.

[0070] In one embodiment, an axial end surface of the lens barrel 322 contacts the light receiving member 31 , and the mounting hole 324 and the second through hole may be coaxially arranged, and the diameter of the mounting hole is larger than that of the second through hole.

[0071] In one embodiment, the radially outer side of the lens is sealed to the inner side of the lens barrel 322 to prevent light from passing through the gap between the two. The inner side of the lens barrel 322 is the surface that encloses the mounting hole 324. In addition, the mounting hole 324 can be a circular hole, and the diameter of the lens can be equal to the diameter of the mounting hole 324. At the same time, the configuration of the lens barrel 322 can be existing technology, and its specific configuration can be selected according to actual needs. This embodiment will not be described in detail here.

[0072] In one embodiment, the light source 321 is connected to the lens barrel 322, and the lens barrel 322 can be sealed to prevent light from passing through the gap between the two. Specifically, the light source 321 can also be arranged in the lens barrel 322, and the light source 321 is sealed to the inner side of the lens barrel 322 to achieve the sealing of the lens barrel 322.

[0073] In one embodiment, light source 321 includes a circuit board 325 and a light emitting lamp 326. Light emitting lamp 326 is connected to circuit board 325, which is connected to a power source and a corresponding control device. The control device can control the power source to supply power to light emitting lamp 326 via circuit board 325, thereby illuminating light emitting lamp 326; at the same time, the control device can control the power source to stop supplying power to light emitting lamp 326, thereby extinguishing light emitting lamp 326. Light emitting lamp 326 can be an LED lamp, for example.

[0074] Light source 321 enclosing lens barrel 322 actually means that circuit board 325 encloses lens barrel 322. Specifically, in the radial direction of mounting hole 324, the outer side of circuit board 325 is sealed to the inner side of lens barrel 322 to prevent light from passing through the gap between them. If mounting hole 324 is circular, circuit board 325 is a disc-shaped structure, and the diameter of circuit board 325 can be equal to the diameter of mounting hole 324.

[0075] In the axial direction of the mounting hole 324 , the light emitting lamp 326 is disposed on one end surface of the circuit board 325 , and the light emitting lamp 326 is located between the lens group 323 and the circuit board 325 . Meanwhile, the lens group 323 is located between the light receiving member 31 and the light source 321 .

[0076] In one embodiment, the control device can be a knob, and twisting the knob can control the connection and disconnection between the circuit board 325 and the power supply. When the circuit board 325 and the power supply are connected, the power supply can supply power to the light emitting lamp 326 through the circuit board 325, and the light emitting lamp 326 is illuminated. When the circuit board 325 and the power supply are disconnected, the power supply cannot supply power to the light emitting lamp 326 through the circuit board 325, and the light emitting lamp 326 is extinguished.

[0077] In one embodiment, the brightness of the light emitted by the light source module 3, specifically the brightness of the light emitted by the light-emitting lamp 326, is adjustable. In this case, a sliding rheostat is provided on the circuit board 325. Turning the knob adjusts the resistance of the sliding rheostat, thereby adjusting the brightness of the light-emitting lamp 326. The sliding rheostat can be part of the knob, in which case the knob is a knob-type rheostat. The connection of the sliding rheostat in the circuit can be conventional and will not be described in detail in this embodiment.

[0078] like Figure 4 As shown, in one embodiment, in the axial direction of the light cylinder 1, the receiving hole 15 includes a first hole 151 and a second hole 152, which are connected in sequence. The diameter of the first hole 151 is smaller than that of the second hole 152, forming a stepped surface 153 between the first hole 151 and the second hole 152. The light guide ring 2 is disposed within the second hole 152. The third light-shielding layer forms the sidewall of the light cylinder 1. The stepped surface 153 covers the end surface of the light guide ring 2 near the first end 11 (this end surface is also the second end surface 24). In this case, the light guide ring 2 abuts against the stepped surface 153. In the axial direction of the receiving hole 15, the end surface of the light guide ring 2 near the first end 11 is offset from the first hole 151. The light guide ring 2 and the second hole 152 can have an interference fit. The first through hole extends from the outer surface of the light cylinder 1 to connect with the second hole 152. In this case, the first opening is located within the second hole 152.

[0079] In the axial direction of the receiving hole 15, the end surface of the light guide ring 2 close to the first end 11 is offset from the first hole 151. This means that in an orthographic projection of a plane perpendicular to the axis of the receiving hole 15, the projection of the first hole 151 and the projection of the second end surface 24 do not overlap, and the projection of the second end surface 24 is completely within the projection of the stepped surface 153. In this way, the second end surface 24 is completely shielded by the stepped surface 153, and light within the light guide ring 2 will not leak from the second end surface 24 into the first hole 151.

[0080] In this embodiment, the accommodating hole 15 is a stepped hole. After assembly, the second end face 24 coincides with the stepped surface, and the width of the stepped surface 153 is greater than or equal to the width of the second end face 24, so that the second end face 24 does not protrude from the stepped surface 153 in the direction from the outside to the inside, so that the stepped surface 153 can cover the second end face 24.

[0081] In addition, the inner side surface of the first hole 151 and the inner side surface of the second hole 152 are both part of the second inner side surface 13 , and the stepped surface 153 is an end surface of the optical tube 1 in the axial direction.

[0082] like Figure 3 and Figure 4As shown, in one embodiment, the light source device 10 further includes a mounting base 5, which is connected to the first end 11 and is used to mount the imaging device, that is, the first end 11 is connected to the imaging device through the mounting base 5; the mounting base 5 is sealed to the end of the lens barrel 322 facing away from the light receiving member 31 to prevent external light from entering the lens barrel 322. In this case, the mounting base 5 can block the lens barrel 322 to prevent light in the lens barrel 322 from leaking from the end of the lens barrel 322 facing away from the light receiving member 31, and can also prevent external light from entering the lens barrel 322 from the end of the lens barrel 322 facing away from the light receiving member 31.

[0083] In addition, the mounting base 5 is detachably connected to the light tube 1, and the mounting base 5 is detachably connected to the lens barrel 322. In this way, different mounting bases 5 can be selected to connect to the light tube 1 and the lens barrel 322 according to different imaging devices, thereby improving the adaptability of the light source device 10.

[0084] The optical tube 1 and the mounting base 5 can be connected by bolts. For example, a threaded hole is provided on the end surface of the first end 11 of the optical tube 1, and an escape hole is provided on the mounting base 5. After the bolt passes through the escape hole and engages with the threaded hole on the optical tube 1, the mounting base 5 can be locked on the optical tube 1 to achieve a detachable connection between the optical tube 1 and the mounting base 5. Of course, the optical tube 1 and the mounting base 5 can also be detachably connected by a snap connection or other means.

[0085] It should be noted that in some scenarios, the mounting base 5 may simply abut against the end surface of the lens barrel 322 away from the optical element 31, and the two are not fixed, in which case a detachable connection is achieved between the lens barrel 322 and the mounting base 5. In some scenarios, the lens barrel 322 and the mounting base 5 may also be detachably connected by a clamping connection or a bolt connection.

[0086] like Figure 5 As shown, an embodiment of the present invention further provides an endoscope system, comprising an imaging device, a sleeve 20, and the light source device 10 described in any one of the above embodiments; the imaging device is connected to the first end 11, the sleeve 20 is connected to the second end 12, and the lens of the imaging device is disposed in the sleeve 20; the second end face 24 of the light guide ring 2 is opposite to the sleeve 20, and the light in the light guide ring 2 can be projected onto the sleeve 20 so as to be guided to the target area through the sleeve 20.

[0087] like Figure 5As shown, in one embodiment, the sleeve 20 is a light guide. A fourth light-shielding layer is provided on the inner side surface of the sleeve 20 (defined as the third inner side surface 201), and a fifth light-shielding layer is provided on the outer side surface of the sleeve 20 (defined as the third outer side surface 202) to prevent light from leaking through the sidewall of the sleeve 20. Specifically, the fourth light-shielding layer completely covers the inner side surface of the sleeve 20, and the fifth light-shielding layer completely covers the outer side surface of the sleeve 20. The sidewall of the sleeve 20 includes the third inner side surface 201, the third outer side surface 202, and the portion of the structure located between the third inner side surface 201 and the third outer side surface 202.

[0088] Alternatively, the sleeve 20 may be a round tube.

[0089] The end surface of the sleeve 20 connected to the light cylinder 1 (defined as the third end surface 203) has a first region that opposes the end surface of the light guide ring 2 facing away from the first end 11 (this end surface is the first end surface 22). The first region is an annular area that surrounds the outside of the lens in the circumferential direction of the sleeve 20. This ensures more uniform light distribution within the sleeve 20, and thus more uniform light emitted from the other end surface of the sleeve 20 and projected onto the target area.

[0090] The third end face 203 is relative to the first end face 22, which means that in an orthographic projection on a plane perpendicular to the axis of the light guide ring 2, the projection of the third end face 203 and the projection of the first end face 22 have an overlapping area; wherein the projection of the first area coincides with the projection of the first end face 22.

[0091] In one embodiment, the third end face 203 and the first end face 22 are completely opposite each other. In this case, in the radial direction of the light guide ring 2, the third end face 203 does not protrude from the first end face 22, and the first end face 22 does not protrude from the third end face 203. After assembly, the third end face 203 and the first end face 22 are affixed together. At this point, the outer diameter of the light guide ring 2 is equal to the outer diameter of the sleeve 20, and the inner diameter of the light guide ring 2 is equal to the inner diameter of the sleeve 20.

[0092] In addition, the fourth light-shielding layer completely covers the third inner side surface 201, so that all areas of the third inner side surface 201 are not light-transmissive; and / or the fifth light-shielding layer completely covers the third outer side surface 202, so that all areas of the third outer side surface 202 are not light-transmissive. Such an arrangement can improve the light leakage prevention effect.

[0093] The fourth light-shielding layer may be a coating, such as an ink layer, applied on the third inner side surface 201. Alternatively, the fourth light-shielding layer may be an object disposed within the sleeve 20 and covering the third inner side surface 201, and the object and the third inner side surface 201 may only be in contact but not fixed together.

[0094] The fifth light-shielding layer may be a coating, such as an ink layer, applied on the third outer side surface 202. Alternatively, the fifth light-shielding layer may be an object provided on the outer side of the sleeve 20 and covering the third outer side surface 202, and the object and the third outer side surface 202 may only be in contact but not fixed together.

[0095] like Figure 5 As shown, in one embodiment, the sleeve 20 is connected to the light tube 1 through a corresponding connector 30. The connector 30 may include a connecting tube; one end of the sleeve 20 is located in the connecting tube and fixed in the connecting tube, and the second end 12 of the light tube 1 also extends into the connecting tube and fixed in the connecting tube. The sleeve 20 and the connecting tube may be connected by interference fit or fixedly connected by bonding, snap-fitting or threading, and the sleeve 20 and the light tube 1 may be connected by interference fit or fixedly connected by bonding, snap-fitting or threading. Of course, the connector 30 used to connect the sleeve 20 and the light tube 1 and the method of connecting the sleeve 20 and the light tube 1 with the connecting tube can be existing technologies.

[0096] It should be understood that the above-mentioned related designs can also be replaced by other methods, such as:

[0097] In other embodiments, the cross section of the accommodating hole 15 may also be other shapes, such as a square, a regular hexagon, etc., and the cross section of the light guide ring 2 may also be other shapes, such as a square ring, a regular hexagonal ring, etc.

[0098] In other embodiments, the third light-shielding layer may also be an ink coating or the like disposed on the second end surface 24 to prevent the light in the light-guiding ring 2 from being emitted from the second end surface 24 .

[0099] In other embodiments, the first light-shielding layer may also cover a portion of the first inner side surface 21 , while another portion of the first inner side surface 21 is not covered by the first light-shielding layer.

[0100] In other embodiments, the second light-shielding layer may also cover a portion of the first outer side surface 23 , while another portion of the first outer side surface 23 is not covered by the second light-shielding layer.

[0101] In other embodiments, the third light-shielding layer may also cover a portion of the first end surface 22 , while another portion of the first end surface 22 is not covered by the third light-shielding layer.

[0102] In other embodiments, the fourth light-shielding layer may also cover a portion of the third inner side surface 201 , and another portion of the third inner side surface 201 may not be covered by the fourth light-shielding layer.

[0103] In other embodiments, the fifth light-shielding layer may also cover a portion of the third outer side surface 202 , while another portion of the third outer side surface 202 is not covered by the fifth light-shielding layer.

[0104] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light source device, characterized in that: Including light tube, light guide ring and light source module; The light cylinder is a light shielding member, a first end of the light cylinder in the axial direction is used to connect to the imaging device, and a second end of the light cylinder in the axial direction is used to connect to the sleeve; The light guide ring is arranged in the light cylinder, and the angle between the axis of the light guide ring and the axis of the light cylinder is zero, an acute angle or an obtuse angle; The inner side surface of the light guide ring is covered with a first light shielding layer; The light source module is connected to the light cylinder and is used to project light toward the light guide ring, so that the light can enter the light guide ring and be emitted from the end surface of the light guide ring away from the first end.

2. The light source device according to claim 1, wherein The outer surface of the light guide ring is covered with a second light shielding layer, and the end surface of the light guide ring close to the first end is covered with a third light shielding layer; A first light-transmitting area is provided on the second light-shielding layer and / or the third light-shielding layer; The light emitted by the light source module can enter the light guide ring from the first light-transmitting area.

3. The light source device according to claim 2, wherein: The second light-shielding layer is a side wall of the light cylinder, and the inner side surface of the light cylinder is in contact with the outer side surface of the light-guiding ring; In the axial direction of the light cylinder, the light guide ring is completely located in the light cylinder; The first light-transmitting area is arranged on the light cylinder and is opposite to the outer side surface of the light-guiding ring; The light source module is located outside the light cylinder and is capable of projecting light from the first light-transmitting area to the light-guiding ring.

4. The light source device according to claim 3, wherein The light source module includes a light container and a light source assembly, and both the light container and the light source assembly are connected to the light cylinder; The light receiving element comprises a light receiving cavity, a second light transmitting area and a third light transmitting area; The light source assembly is located outside the light receiving member and opposite to the second light transmitting area, so that the light emitted by the light source assembly can enter the light receiving cavity from the second light transmitting area; The third light-transmitting area is opposite to the first light-transmitting area, so that the light in the light-containing cavity can be projected from the third light-transmitting area to the first light-transmitting area, so as to be projected to the light-guiding ring.

5. The light source device according to claim 4, wherein: The light source assembly is sealed to the light receiving member to prevent external light from entering the light receiving cavity from the second light-transmitting area; and / or, The light-containing member is sealed and connected to the light cylinder, and blocks the first light-transmitting area to prevent external light from entering the light-guiding ring from the first light-transmitting area; and / or, The first light-shielding layer completely covers the inner side surface of the light-guiding ring.

6. The light source device according to claim 4, wherein: The light source assembly includes a light source, a lens barrel and a lens group; The lens barrel is connected to the light receiving element; The light source is connected to the lens barrel and is used to project light into the lens barrel; The lens group is arranged in the lens barrel and located between the light source and the light receiving member; The lens group is used to focus the light emitted by the light source and project the focused light onto the second light-transmitting area; The light source device further comprises a mounting base, which is connected to the first end and is used for mounting the imaging device; The mounting seat is sealedly connected to an end of the lens barrel facing away from the light-containing member to prevent external light from entering the lens barrel; The mounting seat is detachably connected to the optical tube, and the mounting seat is detachably connected to the lens tube.

7. The light source device according to claim 4, wherein: The light cylinder is provided with a first through hole extending from the outer side surface of the light cylinder to the inner side surface of the light cylinder, the first through hole constituting the first light-transmitting area; the outer side surface of the light guide ring closes the opening formed by the first through hole on the inner side surface of the light cylinder; and / or, The light receiving member is provided with a second through hole extending from the outer surface of the light receiving member to communicate with the light receiving cavity, and the second through hole constitutes the second light-transmitting area; and / or, The light containing member is provided with a third through hole extending from the outer surface of the light containing member to communicate with the light containing cavity, and the third through hole constitutes the third light-transmitting area.

8. The light source device according to claim 2, wherein: The light tube has a receiving hole, and in the axial direction of the light tube, the receiving hole passes through the light tube; In the axial direction of the light cylinder, the accommodating hole includes a first hole and a second hole that are connected in sequence, and the diameter of the first hole is smaller than the diameter of the second hole, so as to form a step surface between the first hole and the second hole; The light guide ring is arranged in the second hole; The third light-shielding layer is a side wall of the light cylinder, and the stepped surface covers the end surface of the light-guiding ring close to the first end; In the axial direction of the accommodating hole, the end surface of the light guide ring close to the first end is staggered with the first hole.

9. An endoscope system, characterized in that: comprising an imaging device, a sleeve, and the light source device according to any one of claims 1 to 8; The imaging device is connected to the first end, the sleeve is connected to the second end, and the lens of the imaging device is arranged in the sleeve; The sleeve is a light guide, and the end surface of the sleeve connected to the light cylinder has a first area opposite to the end surface of the light guide ring away from the first end, and the first area surrounds the outside of the lens; The inner side surface of the sleeve is covered with a fourth light-shielding layer, and the outer side surface of the sleeve is covered with a fifth light-shielding layer to prevent light from leaking from the side wall of the sleeve.

10. The endoscope system according to claim 9, wherein: The brightness of the light emitted by the light source device is adjustable; and / or, The fourth light-shielding layer completely covers the inner side surface of the sleeve; and / or, The fifth light-shielding layer completely covers the outer side surface of the sleeve.

Images