Novel condensation type optical fiber head

Abstract

The utility model discloses a novel condensation type optical fiber head, and relates to the improvement of a photoelectric detection equipment accessory, in particular to the improvement of an optical fiber head. A light guide part is arranged on the left portion of an inner cavity of a threaded outer tube of the optical fiber head, an assembly inner tube is arranged on the left portion of an inner cavity of the light guide part, a lens is arranged on the left portion of an inner cavity of the assembly inner tube, an optical fiber clamping part is arranged on the right side of the lens, and a fastening connecting part is arranged on the right side of the light guide part. The emergent optical fiber penetrates through the fastening connecting piece leftwards, penetrates into the light guide piece and the optical fiber clamping piece and reaches the left end face of the optical fiber clamping piece. The lens is arranged on the emergent light path of the optical fiber, so that the optical fiber head has a focusing function, the emergent optical fiber is clamped, assembled and fastened quickly and conveniently through the optical fiber clamping piece, the optical fiber clamping piece is matched with the light guide piece, the glue filling requirement is reduced, the end face of the optical fiber head does not need to be polished, the maintainability of the optical fiber head is improved, the production period is shortened, and the production cost is reduced. And environmental pollution is reduced.

Description

Technical Field

[0001] The utility model relates to an improvement of a photoelectric detection equipment accessory, in particular to an improvement of an optical fiber head. Background Art

[0002] Photoelectric detection is widely used because of its advantages such as high precision, fast response and non-contact. Optical fiber has expanded the scope of use of photoelectric switches, and because of its advantages such as simple structure and flexible and diverse forms, it is widely used in many application scenarios.

[0003] Existing optical fibers only transmit light. If the light needs to be focused, a focusing lens is required. The use of a focusing lens will increase the size of the optical fiber head and reduce the convenience of use. At the same time, the optical fiber in the existing optical fiber head is fixed by glue filling. Although the detection head made by glue filling has stable connection, it also makes disassembly and maintenance difficult. Some shells are almost impossible to disassemble after glue filling, which will seriously affect the maintainability of the detection head. If the test fails after glue filling during the production process, it cannot be adjusted, which increases the defective rate. At the same time, glue filling requires a long time to wait for the glue to solidify, which increases the production cycle and production cost of the detection head. After glue filling, in order to make the end face of the optical fiber head smooth, it needs to be polished, and polishing will produce dust and sewage, increasing environmental pollution during the production process.

[0004] Based on the utility model patent with patent number ZL 2016 2 0273469.7, entitled "A small sensor head diffuse reflection photoelectric switch", this patent changes the transmitting tube and receiving tube into the output optical fiber and the incident optical fiber, and transforms the photoelectric switch detection head into a fiber head, so that it can be used in conjunction with the fiber amplifier, improving its flexibility of use. At the same time, structural optimization is made to improve production efficiency and reduce production costs. Summary of the invention

[0005] The purpose of the utility model is to provide a novel focusing optical fiber head in view of the defects and shortcomings of the prior art. A lens is arranged on the output light path of the optical fiber, so that the optical fiber head has a focusing function. The output optical fiber is clamped by an optical fiber clamping piece. The assembly and fastening are quick and convenient. In combination with the light guide, the demand for glue filling is reduced, and the end face of the optical fiber head does not need to be polished, thereby improving the maintainability of the optical fiber head, shortening the production cycle, reducing the production cost, and reducing environmental pollution.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: it comprises a threaded outer tube 1, a light guide 2, an assembled inner tube 3, a lens 4, an optical fiber clamping piece 5, a fastening connector 6, an incident optical fiber 7, and an output optical fiber 8. The light guide 2 is arranged on the left part of the inner cavity of the threaded outer tube 1, the assembled inner tube 3 is arranged on the left part of the inner cavity of the light guide 2, the lens 4 is arranged on the left part of the inner cavity of the assembled inner tube 3, the optical fiber clamping piece 5 is arranged on the right side of the lens 4, the fastening connector 6 is arranged on the right side of the light guide 2, the incident optical fiber 7 passes through the fastening connector 6 to the left and is connected with the light guide 2, the output optical fiber 8 passes through the fastening connector 6 to the left, passes through the light guide 2 and the optical fiber clamping piece 5 to reach the left end face of the optical fiber clamping piece 5.

[0007] The left part of the light guide 2 is a round tube 21, and to the right of the round tube 21 is an eccentric hollow cone 22 that is eccentric upward, and to the right of the hollow cone 22 is a small cylinder 23, the diameter of the small cylinder 23 is consistent with the diameter of the incident optical fiber 7, the right end face of the small cylinder 23 is connected to the left end face of the incident optical fiber 7, and a through hole 221 is provided at the lower part of the eccentric hollow cone 22. When assembling the light guide, the end face is aligned with the threaded outer tube 1 by a jig, and no polishing is required.

[0008] The optical fiber clamp 5 is a round tube, and several annular protrusions 51 are arranged inside the tube. An axial opening 52 is arranged on the tube wall of the optical fiber clamp 5, and an axial shallow groove 53 is arranged on the inner tube wall of the optical fiber clamp 5 at a position opposite to the axial opening 52. The diameter of the optical fiber clamp 5 is slightly larger than the inner diameter of the inner tube 3. After the optical fiber clamp 5 is inserted into the inner tube 3, the outer wall of the optical fiber clamp 5 will squeeze the inner wall of the inner tube 3 due to elastic force, and the static friction force provided by the squeezing force makes the optical fiber clamp 5 fastened in the inner tube 3. At the same time, the diameter of the annular protrusion 51 on the inner wall of the optical fiber clamp 5 is smaller than the diameter of the output optical fiber 8. The axial opening 52 is propped open by a tool so that the output optical fiber 8 can be inserted into the optical fiber clamp 5. After the tool is removed, the axial opening 52 becomes smaller, and the annular protrusion 51 will fasten the output optical fiber 8. The axial shallow groove 53 is used to adjust the elastic force of the optical fiber clamp 5 to resist deformation, and the design and adjustment are performed according to the actual elastic force requirements.

[0009] The left part of the fastening connector 6 is an eccentric conical cavity 61 matched with the inner hollow cone 22, and the light entrance hole 62 is to the right of the conical cavity 61, and the light entrance hole 62 is connected to the right end circular surface of the conical cavity 61. A light exit hole 63 is arranged below the light entrance hole 62, and the light exit hole 63 is connected to the through hole 221. The fastening connector 6 can provide support for the connection and fastening of the light guide 2 and the incident optical fiber 7 and the fastening of the output optical fiber 8, reducing the need for glue injection.

[0010] The working principle of the utility model is as follows: it improves the fit between components, increases the pressure between components, provides a certain fastening force for the fixation of components, and is supplemented by a small amount of glue to achieve the final fastening of components.

[0011] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: a lens is arranged on the outgoing light path of the optical fiber, so that the optical fiber head has a focusing function, and the outgoing optical fiber is clamped by an optical fiber clamp, and the assembly and tightening are quick and convenient. In combination with the light guide, the demand for glue filling is reduced, and the end face of the optical fiber head does not need to be polished, which improves the maintainability of the optical fiber head, shortens the production cycle, reduces the production cost, and reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a schematic diagram of the appearance of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0015] Figure 3 yes Figure 2 Schematic diagram of the decomposed structure (optical fiber not included);

[0016] Figure 4 It is a structural schematic diagram of the fastening connector 6 in the utility model.

[0017] Explanation of the reference numerals: threaded outer tube 1, light guide 2, assembly inner tube 3, lens 4, optical fiber clamp 5, fastening connector 6, incident optical fiber 7, output optical fiber 8, circular tube 21, eccentric inner hollow cone 22, small cylinder 23, through hole 221, annular protrusion 51, axial opening 52, axial shallow groove 53, eccentric conical cavity 61, light input through hole 62, light output through hole 63. DETAILED DESCRIPTION

[0018] See also Figure 1-4 As shown, the technical solution adopted in this specific embodiment is: it comprises a threaded outer tube 1, a light guide 2, an assembled inner tube 3, a lens 4, an optical fiber clamp 5, a fastening connector 6, an incident optical fiber 7, and an output optical fiber 8. The light guide 2 is arranged on the left part of the inner cavity of the threaded outer tube 1, the assembled inner tube 3 is arranged on the left part of the inner cavity of the light guide 2, the lens 4 is arranged on the left part of the inner cavity of the assembled inner tube 3, the optical fiber clamp 5 is arranged on the right side of the lens 4, the fastening connector 6 is arranged on the right side of the light guide 2, the incident optical fiber 7 passes through the fastening connector 6 to the left and is connected with the light guide 2, the output optical fiber 8 passes through the fastening connector 6 to the left, passes through the light guide 2 and the optical fiber clamp 5 to reach the left end face of the optical fiber clamp 5.

[0019] The left part of the light guide 2 is a round tube 21, and to the right of the round tube 21 is an eccentric hollow cone 22 that is eccentric upward, and to the right of the hollow cone 22 is a small cylinder 23, the diameter of the small cylinder 23 is consistent with the diameter of the incident optical fiber 7, the right end face of the small cylinder 23 is connected to the left end face of the incident optical fiber 7, and a through hole 221 is provided at the lower part of the eccentric hollow cone 22. Except for the left and right end faces, the other inner and outer surfaces of the light guide are uniformly coated with a reflective film. The light guide is more resilient than the optical fiber, and the end face can be aligned with the threaded outer tube 1 by a jig, so there is no need for grinding.

[0020] The optical fiber fixture 5 is a round tube, and a plurality of annular protrusions 51 are arranged inside the tube. An axial opening 52 is arranged on the tube wall of the optical fiber fixture 5, and an axial shallow groove 53 is arranged on the inner tube wall of the optical fiber fixture 5 at a position opposite to the axial opening 52. The axial opening 52 is propped open with a tool, and the outgoing optical fiber 8 is inserted into the optical fiber fixture 5. After removing the tool, the optical fiber fixture 5 is inserted into the assembly inner tube 3. The left end surface of the optical fiber fixture 5 can be chamfered to facilitate its smooth insertion into the assembly inner tube 3. The axial shallow groove 53 is used to adjust the elastic force of the optical fiber fixture 5 to resist deformation, and the design is adjusted according to the actual elastic force requirements.

[0021] The left part of the fastening connector 6 is an eccentric conical cavity 61 matched with the inner hollow cone 22, and the light entrance hole 62 is to the right of the conical cavity 61, and the light entrance hole 62 is connected to the right end circular surface of the conical cavity 61. A light exit hole 63 is arranged below the light entrance hole 62, and the light exit hole 63 is connected to the through hole 221. The fastening connector 6 can provide support for the connection and fastening of the light guide 2 and the incident optical fiber 7 and the fastening of the output optical fiber 8, reducing the need for glue injection.

[0022] After adopting the above technical solution, the optical fiber head has a focusing function, and the outgoing optical fiber is clamped by the optical fiber clamp. The assembly and tightening are quick and convenient. In combination with the light guide, the demand for glue filling is reduced, and the end face of the optical fiber head does not need to be polished, which improves the maintainability of the optical fiber head, shortens the production cycle, reduces the production cost, and reduces environmental pollution.

[0023] The above description is only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A new type of focusing optical fiber head, characterized by: The optical fiber (7) comprises a threaded outer tube (1), a light guide (2), an assembly inner tube (3), a lens (4), an optical fiber clamping piece (5), a fastening connector (6), an incident optical fiber (7), and an output optical fiber (8). The light guide (2) is arranged at the left part of the inner cavity of the threaded outer tube (1), the assembly inner tube (3) is arranged at the left part of the inner cavity of the light guide (2), the lens (4) is arranged at the left part of the inner cavity of the assembly inner tube (3), the optical fiber clamping piece (5) is arranged at the right side of the lens (4), and the fastening connector (6) is arranged at the right side of the light guide (2). The incident optical fiber (7) passes through the fastening connector (6) to the left and passes through the fastening connector (6) to the left, and passes through the light guide (2) and the optical fiber clamping piece (5) to reach the left end face of the optical fiber clamping piece (5).

2. A novel focusing optical fiber head according to claim 1, characterized in that: The left part of the light guide (2) is a circular tube (21), to the right of the circular tube (21) is an eccentric inner hollow cone (22) that is eccentric upward, to the right of the inner hollow cone (22) is a small cylinder (23), the right end face of the small cylinder (23) is connected to the left end face of the incident optical fiber (7), and a through hole (221) is provided at the lower part of the eccentric inner hollow cone (22).

3. A novel focusing optical fiber head according to claim 1, characterized in that: The optical fiber clamp (5) is a circular tube with a plurality of annular protrusions (51) arranged inside the tube. An axial opening (52) is arranged on the tube wall of the optical fiber clamp (5). An axial shallow groove (53) is arranged on the inner tube wall of the optical fiber clamp (5) at a position opposite to the axial opening (52).

4. A novel focusing optical fiber head according to claim 1, characterized in that: The left part of the fastening connector (6) is an eccentric conical cavity (61) matched with the inner hollow cone (22), and to the right of the conical cavity (61) is a light entrance hole (62), which is connected to the circular surface of the right end of the conical cavity (61), and a light exit hole (63) is arranged below the light entrance hole (62), and the light exit hole (63) is connected to the through hole (221).

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