Lighting device

Abstract

A lighting device comprises a light inlet light bar, an optical fiber assembly and a light outlet light bar. The optical fiber assembly is provided with an optical fiber and a shell assembly used for installing the optical fiber. The front end and the rear end of the shell assembly are a light inlet head and a light outlet head respectively. The light inlet light bar and the light outlet light bar have the functions of guiding light and converging light, the light inlet light bar is assembled in the light inlet head, the light outlet light bar is assembled in the light outlet head, and the light inlet light bar and the light outlet light bar are respectively connected with two ends of the optical fiber in a coupling mode. The two ends of the optical fiber are coupled with the optical wand, so that the optical fiber is far away from a heat source, the service life is prolonged, high-temperature resistance is achieved, and the price is low.

Description

Technical Field

[0001] The invention relates to the field of optics, in particular to a lighting device. Background Art

[0002] Light guides are widely used in medical lighting and industrial lighting. Their main function is to transmit visible light from the light source to the endoscope or lighting end. Figure 1 , including a light inlet 4, a light outlet 6, an outer sheath 5 and a bundled optical fiber 7. The bundled optical fiber 7 is generally bundled with optical fiber filaments of 30um / 50um / 70um in diameter, and contains tens of thousands of strands. When in use, the light inlet receives light from the light source and directly enters the optical fiber, which is then transmitted to the light outlet through the optical fiber.

[0003] There are two ways to bundle the optical fibers at the optical input end according to different scenarios: one is to use optical fiber glue to bundle the optical fibers in a normal environment; the other is to use optical fiber hot-melt to bundle the optical fibers in a high-temperature resistant environment.

[0004] The disadvantages of existing common viscose optical fiber bundles are: the price of glass optical fiber bundles is high, the number of optical fiber strands is large, and the weight is large.

[0005] The disadvantages of existing temperature-resistant hot-melt optical fiber guides are: complex processes such as hot-melt, a large number of optical fiber strands, and high prices.

[0006] The common disadvantages of the two types of light beams are that the bundled optical fiber is close to the heat source, is easily damaged, and has a short lifespan. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a lighting device, which couples a light rod at both ends of the optical fiber to keep the optical fiber away from the heat source, thereby increasing the service life, being resistant to high temperatures, and having a lower price.

[0008] In order to achieve the above technical objectives, the technical solution adopted is: a lighting device, including a light input rod, an optical fiber assembly and a light output rod; the optical fiber assembly has an optical fiber and a shell assembly for installing the optical fiber, and the front and rear ends of the shell assembly are respectively a light input head and a light output head; the light input rod and the light output rod have a light guiding function, the light input head is equipped with a light input rod, and the light output head is equipped with a light output rod, so that the light input rod and the light output rod are respectively coupled and connected to the two ends of the optical fiber.

[0009] The outer diameter of the rear end of the light-incoming light rod of the present invention is less than or equal to the outer diameter of the front end of the optical fiber, and the outer diameter of the rear end of the optical fiber is less than or equal to the outer diameter of the front end of the light-emitting light rod.

[0010] The rear end of the light-inlet light rod of the present invention is variable in diameter, and its rear end outer diameter is smaller than the front end outer diameter, so as to reduce the outer diameter of the optical fiber or reduce the number of optical fibers.

[0011] The front end of the light emitting light rod of the present invention is variable in diameter, and its front end outer diameter is smaller than the rear end outer diameter, so as to reduce the outer diameter of the optical fiber or reduce the number of optical fibers.

[0012] The housing assembly of the present invention is provided with plug pins extending forward and backward, and the plug pins are used for inserting optical fibers.

[0013] The housing assembly of the present invention is provided with a connecting sleeve extending forward and backward, one end of the connecting sleeve is used for inserting a light-input light rod or a light-output light rod, and the other end is used for inserting a pin.

[0014] The optical fiber described in the present invention is a single optical fiber or an optical fiber bundle.

[0015] The light input head or light output head described in the present invention is integrally formed.

[0016] The light input head or light output head described in the present invention is composed of a sleeve and a fixed sleeve. The sleeve extends from the front end to the rear end to cover the outer surface of the light input light rod or the light output light rod. The fixed sleeve is arranged at the end of the light input light rod or the light output light rod away from the coupling optical fiber to cover the end of the sleeve. A light-transmitting hole is provided on the end face of the fixed sleeve.

[0017] The optical fiber described in the present invention is a variable diameter structure, wherein the outer diameter of the middle section is smaller than the outer diameters of the two ends.

[0018] The light input head and / or light output head described in the present invention can be detachably mounted on the housing assembly.

[0019] The beneficial effects of the present invention are: 1. The present invention couples the light input light rod and the light output light rod with the optical fiber, so that the light input light rod, the light output light rod and the optical fiber are assembled together in the outer shell assembly. The two ends of the optical fiber are away from the heat sources at both ends, which can smoothly realize light transmission while reducing the heat of the optical fiber and improving the service life of the optical fiber. Moreover, after being away from the light source, the multi-core optical fiber bundle can be processed by gluing, which reduces the cost compared with hot melting and can also be used in high temperature environments.

[0020] 2. Set the diameter of the light-inlet and light-outlet ends of the light-inlet and light-outlet optical fibers, and the diameter of the light-inlet and light-outlet optical fibers to ensure the transmission efficiency of visible light from the light source to the user end.

[0021] 3. Design the light input light rod and the light output light rod into a variable diameter structure. When the light input light rod, the light output light rod and the optical fiber are connected to set the size, the outer diameter of the optical fiber or the number of optical fibers can be reduced without affecting the transmission efficiency of visible light, thereby reducing costs.

[0022] 4. The pins serve to fix the optical fiber, making production and assembly easier.

[0023] 5. The connecting sleeve corrects the coupling accuracy between the optical rod and the pin, thereby improving the coupling efficiency.

[0024] 6. The structure of the present invention no longer limits the type of optical fiber, and a single optical fiber or an optical fiber bundle can be used, which can be selected according to the working conditions.

[0025] 7. The optical input head or optical output head is integrated into one piece, which is convenient and more economical.

[0026] 8. The light inlet or outlet head is composed of a sleeve and a fixed sleeve. The fixed sleeve is covered on the end of the sleeve. This structure is more solid, provides comprehensive protection for the end of the light rod, and is resistant to high temperatures.

[0027] 9. Design the optical fiber into a variable diameter structure, and form a structure with thick ends and thin middle through stretching to reduce the cost of optical fiber use.

[0028] 10. The light input head and / or light output head can be detachably mounted on the housing assembly, which is convenient for maintenance and can change the light rods with different light input and light output powers according to the application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the prior art structure; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 for Figure 2 Cross-sectional structural diagram; Figure 4 A perspective view of the present invention; Figure 5 is a front end cross-sectional view of the present invention; Figure 6 is a rear end cross-sectional view of the present invention; Figure 7 It is a schematic diagram of the appearance of the optical fiber of the present invention; Figure 8 It is a schematic diagram of the structure of the pin of the present invention; Fig. 9 A cross-sectional view of a connecting sleeve of a light inlet end of the present invention; Fig.10 It is a cross-sectional view of the connecting sleeve of the light output end of the present invention; Fig.11 It is a schematic diagram of the variable diameter coupling optical fiber of the light input light rod and the light output light rod of the present invention; Fig.12 It is a schematic diagram of the structure of the light-incoming light rod, the light-outgoing light rod and the optical fiber of the present invention with equal diameters; Fig.13 for Fig.12 A magnified front end view; Fig.14 for Fig.12 A magnified view of the rear end; Fig.15 This is a schematic diagram of the structure of the optical fiber diameter change of the present invention; Fig.16 for Fig.15 A magnified front end view; Fig.17 for Fig.15 A magnified view of the rear end; Fig.18 It is a schematic structural diagram of the integrated optical head of the present invention; Fig.19 It is a schematic structural diagram of the combined optical head of the present invention; Reference numerals: 1. Light rod; 2. optical fiber assembly, 21. optical fiber, 22. housing assembly; 221, optical head inlet, 222, optical head outlet, 223, pin, 224, connecting sleeve; 2211, sleeve, 2212, fixing sleeve, 22121, light transmission hole; 3. Light emitting rod; 4. Light input end, 5. External protection, 6. Light output end, 7. Bundled optical fiber. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that the illustrations provided in this embodiment are only used to illustrate the basic concept of the present invention in a schematic manner. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0032] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0033] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “middle”, “longitudinal”, “lateral”, “horizontal”, “inner”, “outer”, “radial”, and “circumferential” etc. cited in this specification are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, a conflicting connection, or an integral connection. A person of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0035] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] like Figure 2 , Figure 3 , Figure 4As shown, a lighting device includes a light-incoming light rod 1, an optical fiber assembly 2 and a light-emitting light rod 3; the optical fiber assembly 2 has an optical fiber 21 and a shell assembly 22 for installing the optical fiber 21. The structure of the shell assembly 22 is the same as the outer protection 5 in the prior art, and is a hollow long strip structure for protecting and installing the optical fiber 21. Compared with the prior art in which the two ends of the optical fiber are directly aligned with the light source, the two ends of the optical fiber 21 in the present application are far away from the two ends of the shell assembly 22, that is, away from the heat source. The front and rear ends of the shell assembly 22 are respectively a light-incoming head 221 and a light-emitting head 222; the light-incoming light rod 1 and the light-emitting light rod 3 have a light-guiding function, and the light rod structure and type are not limited, for example, a lens, a light-guiding column, an optical fiber light rod, etc. It should be noted that when the light-incoming light rod adopts a lens to enter the light, the light-emitting light rod preferably needs to adopt a combination structure such as a light-homogenizing sheet + lens, a light-homogenizing sheet + light-guiding column, a light-homogenizing sheet + an optical fiber light rod, so that the energy-concentrated light is evenly distributed and the visual field effect is improved. The light inlet head 221 is equipped with a light inlet rod 1 as the light inlet end 4, and the light outlet head 222 is equipped with a light outlet rod 3 as the light outlet end 6, so that the light inlet rod 1 and the light outlet rod 3 are coupled and connected with the two ends of the optical fiber 21 respectively. The coupling connection includes contact docking and non-contact docking. As long as the normal transmission and transmission requirements of light can be guaranteed, when in use, the light inlet rod 1 receives the light source and enters the optical fiber, and is transmitted to the light outlet rod 3 through the optical fiber, and the light is emitted by the light outlet rod 3. The lighting device keeps the optical fiber away from the heat source, and there is no need to limit the optical fiber bundling process. After the light rod is fixed, it can withstand a certain high temperature compared to the optical fiber, and can continuously transmit light at high temperature, that is, it can be used in a high temperature environment, and the cost can also be reduced, because the service life of the optical fiber is improved compared to the existing lighting device after it is away from the heat source.

[0037] To ensure light transmission efficiency, the rear end outer diameter of the light input light rod 1 is required to be ≤ the front end outer diameter of the optical fiber 21 , and the rear end outer diameter of the optical fiber 21 is required to be ≤ the front end outer diameter of the light output light rod 3 .

[0038] Based on the outer diameter dimension defined above, the lighting device of the present application can be designed into three structural forms: (1) The rear end of the light-incoming optical rod 1 is reduced in diameter, and its rear end outer diameter is smaller than the front end outer diameter. The front end of the light-outgoing optical rod 3 is reduced in diameter, and its front end outer diameter is smaller than the rear end outer diameter, so as to reduce the outer diameter of the optical fiber 21 or reduce the number of optical fibers 21. Fig.11 As shown, the light input end 4 changes the diameter of the light input light rod 1 to convert the large beam spot into a small beam spot, and then couples with the optical fiber 21; after the optical fiber 21 transmits the light, it couples with the light output light rod 3 at the light output end 6 to convert the small beam of optical fiber into a large beam spot. Through two conversions, the outer diameter of the optical fiber can be effectively reduced or the number of optical fibers can be reduced without reducing the incident and output light spots, thereby reducing costs.

[0039] (2) If Fig.12 , Fig.13 , Fig.14As shown, the light-incoming optical rod 1, the optical fiber 21, and the light-outgoing optical rod 3 are all of equal-diameter structures, and all three are straight cylindrical. This structure is convenient for installation and docking.

[0040] (3) If Fig.15 , Fig.16 , Fig.17 As shown, the optical fiber 21 is a variable diameter structure, in which the outer diameter of the middle section is smaller than the outer diameter of the two ends. This structure is used in conjunction with the straight cylindrical light input light rod 1 and the light output light rod 3. The optical fiber 21 is made through a conventional stretching process. By stretching and reducing the diameter of the optical fiber 21, the economic cost of the optical fiber 21 is reduced.

[0041] Based on the above examples, Figure 8 As shown, a pin 223 extending forward and backward may be provided in the housing component 22, and the pin 223 is used to insert the optical fiber 21, and further fix the optical fiber 21, so as to facilitate the production of the optical fiber 21, and it is not necessary to consider the assembly and fixation of the optical fiber by the housing component 22. Figure 5 , Figure 6 As shown, it is a state diagram of the pin 223 being applied to connect the light input end and the light output end with the optical fiber 21, which can be installed by adhesive. The end of the pin 223 used for inserting the optical fiber 21 is the large end, and the end corresponding to the light rod fixing the optical fiber 21 is the small end, which is convenient for the insertion and installation of the optical fiber 21.

[0042] On the basis of adding the pin 223, a connecting sleeve 224 extending forward and backward can be provided in the housing component 22. The connecting sleeve 224 plays a role in correcting the coupling accuracy between the light rod and the pin, thereby improving the coupling efficiency. One end of the connecting sleeve 224 is used for inserting the light-input light rod 1 or the light-output light rod 3, and the other end is used for inserting the pin 223. Figure 3 , Figure 5 , Fig. 9 As shown, the front end of the connecting sleeve 224 of the light inlet end 4 is used for inserting the light inlet light rod 1, and the rear end is used for inserting the pin 223. Figure 6 , Fig.10 As shown, the rear end of the connecting sleeve 224 is used for inserting the light rod 3, and the front end is used for inserting the pin 223. The specific structure of the connecting sleeve 224 can be adjusted according to the inner cavity structure of the housing component 22, so that the connecting sleeve 224 and the inner cavity gap match to play a certain supporting role.

[0043] like Figure 7As shown, the optical fiber 21 is a single optical fiber or an optical fiber bundle. The optical fiber bundle is formed by gluing or hot-melting multiple optical fibers into a bundle. The gluing process can be used to reduce costs. A single optical fiber can be a polymer optical fiber, which is light, not easy to break, tensile and durable, and is suitable for scenes with low light source power, low temperature, and low light flux. It can also be a quartz optical fiber, which is resistant to high energy and convenient for lens-type light rods to focus. The optical fiber bundle can be a glass fiber bundle, which has a thin optical fiber bundle, a small number, a low price, and a small overall bending diameter change, and is suitable for scenes with high light source power, high temperature, and high light flux.

[0044] The light inlet head 221 or the light outlet head 222 is integrally formed, and the forming and installation are convenient for the light rod. Fig.18 Taking the light input head 221 at the light input end as an example, the light input head 221 is integrally formed and used to fix the light input light rod 1 .

[0045] like Fig.19 As shown, the light inlet head 221 or the light outlet head 222 is composed of a sleeve 2211 and a fixing sleeve 2212. The sleeve 2211 extends from the front end to the rear end to cover the outer surface of the light inlet light rod 1 or the light outlet light rod 3. The fixing sleeve 2212 is arranged at the end of the light inlet light rod 1 or the light outlet light rod 3 away from the coupling optical fiber 21 to cover the end of the sleeve 2211. A light hole 22121 is provided on the end face of the fixing sleeve 2212. The light hole 22121 is a light inlet hole when it is located at the light inlet end 4 and a light outlet hole when it is located at the light outlet end 6. The shape of the fixing sleeve 2212 is cylindrical or cover-shaped. By adding the fixing sleeve 2212, the stability of the light inlet head 221 or the light outlet head 222 is further improved, the fixed light rod is more stable, and the light rod is isolated from the heat source to improve the service life of the light rod.

[0046] like Figure 5 , Figure 6 As shown, the light input head 221 and / or the light output head 222 are detachably installed on the outer shell assembly 22. Different light input light rods 1 or light output light rods 3 can be selected and replaced according to the required transmission power. It is convenient to connect and install the installed light rods to the outer shell assembly 22, which is convenient for repair and replacement.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit or restrict the present invention. For researchers or technicians in this field, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection declared by the present invention.

Claims

1. A lighting device, Features: The invention comprises a light-incoming light rod (1), an optical fiber assembly (2) and a light-emitting light rod (3); the optical fiber assembly (2) comprises an optical fiber (21) and a shell assembly (22) for mounting the optical fiber (21); the front and rear ends of the shell assembly (22) are respectively a light-incoming head (221) and a light-emitting head (222); the light-incoming light rod (1) and the light-emitting light rod (3) have a light-guiding function; the light-incoming light rod (1) is mounted in the light-incoming head (221), and the light-emitting light rod (3) is mounted in the light-emitting head (222), so that the light-incoming light rod (1) and the light-emitting light rod (3) are respectively coupled and connected to the two ends of the optical fiber (21).

2. A lighting device as claimed in claim 1, Features: The outer diameter of the rear end of the light-incoming light rod (1) is less than or equal to the outer diameter of the front end of the optical fiber (21), and the outer diameter of the rear end of the optical fiber (21) is less than or equal to the outer diameter of the front end of the light-outgoing light rod (3).

3. A lighting device as claimed in claim 2, Features: The rear end of the light-inlet rod (1) is reduced in diameter, and the outer diameter of the rear end is smaller than the outer diameter of the front end, so as to reduce the outer diameter of the optical fiber (21) or the number of optical fibers (21).

4. A lighting device as claimed in claim 2 or 3, Features: The front end of the light emitting light rod (3) is reduced in diameter, and its front end outer diameter is smaller than the rear end outer diameter, so as to reduce the outer diameter of the optical fiber (21) or the number of optical fibers (21).

5. A lighting device as claimed in claim 1, Features: The optical fiber (21) is a variable diameter structure, wherein the outer diameter of the middle section is smaller than the outer diameters of the two ends.

6. A lighting device as claimed in claim 1, Features: The housing component (22) is provided with a plug pin (223) extending forward and backward, and the plug pin (223) is used for inserting the optical fiber (21).

7. A lighting device as claimed in claim 6, Features: A connecting sleeve (224) extending forward and backward is provided in the housing component (22); one end of the connecting sleeve (224) is used for inserting the light inlet light rod (1) or the light outlet light rod (3), and the other end is used for inserting the pin (223).

8. A lighting device as claimed in claim 1, Features: The optical fiber (21) is a single optical fiber or an optical fiber bundle.

9. A lighting device as claimed in claim 1, Features: The light inlet head (221) or the light outlet head (222) is integrally formed.

10. A lighting device as claimed in claim 1, Features: The light inlet head (221) or the light outlet head (222) is composed of a sleeve (2211) and a fixing sleeve (2212); the sleeve (2211) extends from the front end to the rear end to cover the outer surface of the light inlet light rod (1) or the light outlet light rod (3); the fixing sleeve (2212) is arranged at an end of the light inlet light rod (1) or the light outlet light rod (3) away from the coupling optical fiber (21) to cover the end of the sleeve (2211); and a light transmission hole (22121) is provided on the end surface of the fixing sleeve (2212).

11. A lighting device as claimed in claim 1, Features: The light input head (221) and / or the light output head (222) are detachably mounted on the housing assembly (22).

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