Light diffusion cover for explosion-proof lamp

Abstract

The utility model relates to a light diffusion cover for an explosion-proof lamp, which comprises a head part and a main body part, the head part is arranged at the front end of the main body part, the head part is in a spherical segment shape, the main body part is cylindrical, an optical fiber accommodating cavity is arranged in the main body part, and both the head part and the main body part are made of transparent materials and are integrally formed through mould processing. The brightness of the front end of the light guide fiber is effectively improved, so that the light guide fiber can meet the requirement of special scenes for long-distance illumination brightness.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof lamps, in particular to a light expansion cover for explosion-proof lamps. Background Art

[0002] Light-guiding fiber is a chemical fiber made of quartz with a skin-core structure of different refractive indices. It can conduct light by total reflection of the skin. It has many advantages such as high light transmittance, low loss, lightness and softness. Based on this, light-guiding fiber began to be used for lighting in complex scenes, such as mines and underground tunnels.

[0003] However, since the light intensity of the optical fiber will inevitably decay due to the transmission distance during the transmission process, the optical fiber cannot meet the brightness requirements of long-distance lighting in special scenes. Utility Model Content

[0004] The purpose of the utility model is to provide a light expansion cover for an explosion-proof lamp to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A light expander for an explosion-proof lamp comprises a head and a main body, wherein the head is arranged at the front end of the main body, the head is in a spherical shape, the main body is in a cylindrical shape, an optical fiber accommodating cavity is arranged in the main body, and the head and the main body are both made of transparent material and are integrally formed by mold processing.

[0007] Optionally, the optical fiber accommodating cavity comprises a cavity body, an optical fiber inlet and an optical fiber outlet, the cavity body is arranged between the optical fiber inlet and the optical fiber outlet, and the cavity body is cylindrical.

[0008] In a possible implementation manner, the head includes an upper top surface and a lower end surface, the upper top surface is a curved surface, the lower end surface is a circular surface, and the optical fiber outlet is arranged at the center of the lower end surface.

[0009] In a possible implementation manner, a fixing portion is connected to the rear end of the main body, and the optical fiber entrance is provided at an end of the fixing portion away from the main body.

[0010] In a possible implementation manner, a supporting portion is provided between the main body portion and the fixing portion.

[0011] Optionally, the support portion is in a circular ring shape, the inner circle of the support portion is sleeved on the fixing portion, and the outer circle of the support portion is connected to the bottom edge of the main body portion.

[0012] In a possible implementation manner, the fixing portion is provided with a thread for fixing.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] By combining the spherical segment-shaped head with the cylindrical main body, the brightness of the front end of the light-guiding fiber can be effectively improved, so that the light-guiding fiber can adapt to the needs of long-distance lighting brightness in special scenes. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a light expansion cover for an explosion-proof lamp of the utility model;

[0016] Figure 2 The utility model is a diagram of the internal structure of the light expansion cover for explosion-proof lamps.

[0017] In the figure: 10, head, 20, main body, 30, fixing part, 40, supporting part, 50, optical fiber accommodating cavity, 11, upper top surface, 12, lower end surface, 51, optical fiber outlet, 52, cavity, 53, optical fiber inlet. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0019] like Figure 1-2 As shown, a light expander for an explosion-proof lamp includes a head 10 and a main body 20. The head 10 is arranged at the front end of the main body 20. The head 10 is in a spherical shape, and the main body 20 is in a cylindrical shape. An optical fiber accommodating cavity 50 is provided in the main body 20. The head 10 and the main body 20 are both made of transparent materials and are integrally formed through mold processing.

[0020] In the present invention, the light diffusing hood is a combination of a cylindrical main body 20 and a spherical head 10, while the traditional light diffusing hood is in a trumpet shape. If a trumpet-shaped light diffusing hood is also used at the front end of the light-guiding fiber, the light cannot be concentrated and the light diffusing effect cannot be achieved. The spherical head 10 can refract and converge the light emitted by the light-guiding fiber, thereby increasing the brightness, while if the head 10 is in a spherical cap or other shapes, the light will not be concentrated and the purpose of brightness enhancement cannot be achieved. The head 10 and the main body 20 can be made of transparent materials such as quartz glass.

[0021] The optical fiber accommodating cavity 50 includes a cavity 52, an optical fiber entrance 53 and an optical fiber exit 51. The cavity 52 is arranged between the optical fiber entrance 53 and the optical fiber exit 51, and the cavity 52 is cylindrical. The head 10 includes an upper top surface 11 and a lower end surface 12. The upper top surface 11 is an arc surface, and the lower end surface 12 is a circular surface. The optical fiber exit 51 is arranged at the center of the lower end surface 12. The rear end of the main body 20 is connected to the fixing part 30, and the optical fiber entrance 53 is arranged at an end of the fixing part 30 away from the main body 20.

[0022] When in use, insert the front end of the light-guiding optical fiber into the optical fiber accommodating cavity 50, and then use the light source to light the light-guiding optical fiber. The light emitted from the front end of the light-guiding optical fiber can be transmitted through the main body 20 or the head 10. The height of the main body 20 should be greater than the diameter of the lower end surface 12, such as the height of the main body 20 is 25-30 mm, and the diameter of the lower end surface 12 is 10-15 mm. In this way, the desired light expansion effect can be obtained.

[0023] In order to ensure smooth connection between the main body 20 and the fixing part 30, a support part 40 is provided between the main body 20 and the fixing part 30. The support part 40 is annular, the inner circle of the support part 40 is sleeved on the fixing part 30, and the outer circle of the support part 40 is connected to the bottom edge of the main body 20. The support part 40 can play a role of reducing the diameter, so that the main body 20 can be firmly fixed on the fixing part 30.

[0024] The fixing part 30 is provided with a thread for fixing. The fixing part 30 is connected to the joint of the light guide fiber pulled out from the light source through the thread, so as to complete the connection between the light diffuser and the light source.

[0025] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", "left and right", "front and back", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0027] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A light expander for an explosion-proof lamp, characterized in that: The invention comprises a head portion (10) and a main body portion (20), wherein the head portion (10) is arranged at the front end of the main body portion (20), the head portion (10) is in the shape of a spherical segment, the main body portion (20) is in the shape of a cylinder, an optical fiber accommodating cavity (50) is arranged in the main body portion (20), and the head portion (10) and the main body portion (20) are both made of transparent material and are integrally formed by mold processing.

2. The light expander for explosion-proof lamp according to claim 1, characterized in that: The optical fiber accommodating cavity (50) comprises a cavity (52), an optical fiber entrance (53) and an optical fiber exit (51); the cavity (52) is arranged between the optical fiber entrance (53) and the optical fiber exit (51); and the cavity (52) is cylindrical.

3. The light expander for explosion-proof lamp according to claim 2, characterized in that: The head (10) comprises an upper top surface (11) and a lower end surface (12); the upper top surface (11) is a curved surface, the lower end surface (12) is a circular surface, and the optical fiber outlet (51) is arranged at the center of the lower end surface (12).

4. The light expander for explosion-proof lamp according to claim 2, characterized in that: The rear end of the main body (20) is connected to a fixing part (30), and the optical fiber entrance (53) is arranged at an end of the fixing part (30) away from the main body (20).

5. The light expander for explosion-proof lamp according to claim 4, characterized in that: A supporting portion (40) is provided between the main body portion (20) and the fixing portion (30).

6. The light expander for explosion-proof lamp according to claim 5, characterized in that: The support portion (40) is in the shape of a circular ring, the inner circle of the support portion (40) is sleeved on the fixing portion (30), and the outer circle of the support portion (40) is connected to the bottom edge of the main body portion (20).

7. The light expander for explosion-proof lamp according to claim 4, characterized in that: The fixing portion (30) is provided with a thread for fixing.

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