QBH optical fiber output head connection system

Abstract

The invention relates to a QBH optical fiber output head connecting system which comprises a male head of a QBH optical fiber output head and a male head adapter flange, the male head adapter flange is arranged on the male head in a sleeving mode, a plurality of chutes are formed in the male head, at least one of the chutes is a limiting chute, the length of the limiting chute is larger than that of the other chutes, and the length of the limiting chute is larger than that of the other chutes. The male head is further provided with a first contact ring and a second contact ring, the male head adapter flange comprises an adapter flange body and a locking cone, the locking cone is in threaded connection with the bottom of the adapter flange body, a circuit assembly mounting groove is formed in one side of the adapter flange body, and a limiting hole is formed in the other side of the adapter flange body. The locking cone is in a hollow cylinder shape, an inner conical face converging downwards is arranged on the inner side of the upper end of the locking cone, and a plurality of annular grooves are formed in the locking cone. Through reasonable arrangement, the problems that an existing locking structure is prone to breakage, poor in adaptability, insufficient in sealing and the like are solved, the structure is simple, and the production and machining requirements can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber laser transmitters, and particularly to a QBH fiber output head connection system. Background Art

[0002] The QBH fiber output quick plug-in interface is a connection structure commonly used in laser applications with a power above kilowatt level. The connection structure includes a male head and a female socket. Usually, the laser energy of the laser is conducted out by the fiber output head (male head) and then enters the two-stage locking structure (female socket) for locking and positioning. With the domestic substitution, there are problems such as inconsistent tolerances in the standard dimensions of the male head of the fiber output head and the locking structure manufactured by domestic companies, unreasonable tolerance range setting, poor general adaptability, reduced machining accuracy of parts, and replacement of some part materials with low-strength aluminum alloy, resulting in a significant decline in the seismic and fatigue resistance during long-term use, and the internal pin breaks and cannot be disassembled or assembled, which troubles the majority of users.

[0003] At present, a large number of market applications have found that it has many disadvantages. The clamping method of pressing down the locking pin on the outer cam barrel with the conical surface positioning fit has the key stress points concentrated at the roots of the three cantilever pins, and the cantilever length of the locking pin is too long, which easily causes the root of the pin to break. The broken pin causes the cam barrel to reset and jam, and the fiber output head cannot be disassembled or assembled; the multi-layer nested structure has many pores and gaps, and cannot achieve a good dust-proof sealing effect; the assembly process is complex and has many details, which is not convenient for reducing production costs.

[0004] Therefore, it is urgent to invent a QBH fiber output head connection system. Summary of the Invention

[0005] Based on this, it is necessary to provide a QBH fiber output head connection system for the above problems.

[0006] A QBH fiber output head connection system includes a male head of the QBH fiber output head and a male head adapter flange. The male head adapter flange is sleeved on the male head. The male head is provided with a plurality of inclined grooves, and at least one of the plurality of inclined grooves is a limit inclined groove with a length greater than that of other inclined grooves. The male head is also provided with a first contact ring and a second contact ring.

[0007] The male adapter flange includes an adapter flange body and a locking cone. The locking cone is threadedly connected to the bottom of the adapter flange body. The top of the adapter flange body is provided with a flange installation positioning surface, which includes an axial positioning surface, a first coaxial positioning surface, and an end face sealing surface. An installation cavity is provided inside the adapter flange body, and a circuit component installation groove is provided on one side of the adapter flange body, and a limiting hole is also provided on the other side. The locking cone is a hollow cylindrical shape. The inner side of the upper end of the locking cone is provided with a downward-converging inner conical surface, the outer side of the upper end is provided with a coaxial positioning surface, and a plurality of annular grooves are provided on the locking cone.

[0008] A circuit component is provided on the circuit component installation groove. The circuit component includes a first spring contact point, a second spring contact point, a contact circuit board, and a normally closed temperature switch. Both the first spring contact point and the second spring contact point are welded to the contact circuit board.

[0009] In one embodiment, the circuit component installation groove includes a circuit board installation groove and a switch installation groove. The contact circuit board is installed on the circuit board installation groove, and the normally closed temperature switch is installed in the switch installation groove.

[0010] In one embodiment, the head of the first spring contact point faces the inside of the circuit board installation groove and elastically contacts the first contact ring, and an internal compression spring is provided. The head of the second spring contact point faces the inside of the circuit board installation groove and elastically contacts the second contact ring, and an internal compression spring is provided.

[0011] In one embodiment, the normally closed temperature switch is thermally connected to the flange body through the switch installation groove, and both ends of the top of the normally closed temperature switch are electrically connected to the first spring contact point and the second spring contact point through wires respectively.

[0012] In one embodiment, a limiting screw is provided on the limiting hole, and the limiting screw is limited to the end of the limiting inclined groove through the limiting hole.

[0013] In one embodiment, the installation cavity is matched with the male head, and at least three pin holes are evenly distributed along the circumferential direction on its inner wall, and the pin holes penetrate through the side wall of the flange body.

[0014] In one embodiment, O-ring seals are installed in a plurality of the annular grooves.

[0015] In one embodiment, positioning reference points are provided on the flange installation positioning surface.

[0016] In one embodiment, the triggering threshold of the normally closed temperature switch is 30 - 70 °C.

[0017] In one embodiment, flange screw holes are further provided on the flange mounting positioning surface, and the number of the flange screw holes is 4 - 8, which are evenly distributed along the circumferential direction.

[0018] The above QBH fiber optic output head connection system, through the mutual cooperation of the male adapter flange, the inclined grooves and the contact rings on the male head of the QBH fiber optic output head, has the following beneficial effects:

[0019] Improved mechanical reliability: Utilizing the characteristics of being fixed by locking pins and having a short cantilever, there is no risk of fracture, avoiding jamming faults, and the locking method is simple, the locking state is stable without loosening, and the anti-seismic and anti-fatigue effects are remarkable;

[0020] Adaptability and sealing performance: The single-layer flange structure has few pores, and together with the O-ring, it realizes IP65-level dust-proof sealing;

[0021] Assembly and maintenance efficiency: The number of assembly steps is reduced by 3 - 4 steps, and it supports quick disassembly and assembly within 30 seconds; The temperature monitoring function realizes fault warning and reduces the maintenance cost. It is beneficial to production and processing requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the usage state of the present invention;

[0023] Figure 2 It is a schematic diagram of the male head structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the male adapter flange structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the circuit component installation groove structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the connection between the circuit component and the male head of the present invention;

[0027] Figure 6 It is a schematic diagram of the male adapter flange of the present invention from another angle;

[0028] Figure 7 It is a schematic diagram of the locking cone structure of the present invention;

[0029] Figure 8 It is a cross-sectional view of the male adapter flange of the present invention;

[0030] Figure 9 It is a perspective view of the adapter flange body of the present invention;

[0031] Figure 10 It is a schematic diagram of the connection between the normally closed temperature switch and the spring contact point wire of the present invention.

[0032] 1. Male connector; 11. Oblique groove; 12. Limit oblique groove; 13. First contact ring; 14. Second contact ring; 2. Male connector adapter flange; 21. Adapter flange body; 211. Flange installation positioning surface; 2111. Axial positioning surface; 2112. First coaxial positioning surface; 2113. End face sealing surface; 212. Installation cavity; 213. Circuit component installation groove; 2131. Circuit board installation groove; 2132. Switch installation groove; 214. Limit hole; 22. Locking cone; 221. Annular groove; 222. Second coaxial positioning surface; 3. Circuit component; 31. First spring contact point; 32. Second spring contact point; 33. Contact circuit board; 34. Normally closed temperature switch; 4. Limit screw; 5. Pin hole; 6. O-ring seal; 7. Positioning reference point; 8. Flange screw hole; 9. Inner conical surface. Detailed implementation manners

[0033] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description is made on the specific implementation manners of the present invention. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0034] As used herein, the term "prepared from" is synonymous with "comprising". The terms "comprising", "including", "having", "containing" or any other variation thereof used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or device containing the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article or device.

[0035] When an equivalent, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values and lower preferred values, it should be understood that all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value are specifically disclosed, regardless of whether the ranges are separately disclosed. For example, when the range "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within the range.

[0036] In addition, the indefinite articles "a" and "an" before the elements or components of the present invention do not limit the quantity requirements (i.e., the number of occurrences) of the elements or components. Therefore, "a" or "an" should be construed to include one or at least one, and the singular form of the element or component also includes the plural form, unless the quantity clearly refers to the singular form.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention pertains. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0038] Refer to Figures 1 - 9 ; A QBH fiber optic output head connection system, comprising a male head 1 of the QBH fiber optic output head and a male head adapter flange 2, the male head adapter flange 2 being sleeved on the male head 1, the male head 1 being provided with a plurality of inclined grooves 11, and at least one of the plurality of inclined grooves 11 being a limiting inclined groove 12 having a length greater than that of the other inclined grooves 11, the male head 1 further being provided with a first contact ring 13 and a second contact ring 14, the first contact ring 13 and the second contact ring 14 being electrically connected to two wires inside the optical fiber and transmitted to the laser through the two wires inside, which is beneficial for transmitting temperature alarm signals.

[0039] The male head adapter flange 2 comprises an adapter flange body 21 and a locking cone 22, the locking cone 22 being threadedly connected to the bottom of the adapter flange body 21, the top of the adapter flange body 21 being provided with a flange installation positioning surface 211, the flange installation positioning surface 211 including an axial positioning surface 2111, a first coaxial positioning surface 2112, and an end face sealing surface 2113, the inner side of the adapter flange body 21 being provided with an installation cavity 212, and one side of the adapter flange body 21 being provided with a circuit component installation groove 213, the other side further being provided with a limiting hole 214, the locking cone 22 being a hollow cylindrical shape, the inner side of the upper end of the locking cone 22 being provided with a downward-converging inner conical surface 9, the outer side of the upper end of the locking cone 22 being provided with a second coaxial positioning surface 222, the lower end of the locking cone 22 being provided with a wrench position 223, and the locking cone 22 being provided with a plurality of annular grooves 221. The threaded connection method, the setting of the second coaxial positioning surface 222, the setting of the inner conical surface 9, and the setting of the plurality of annular grooves 221 are all beneficial for improving the installation accuracy, stability, and airtightness of the male head adapter flange 2 and the male head 1 in the subsequent process.

[0040] A circuit component 3 is installed on the circuit component installation groove 213. The circuit component 3 includes a first spring contact point 31, a second spring contact point 32, a contact circuit board 33, and a normally closed temperature switch 34. The first spring contact point 31 and the second spring contact point 32 are both welded to the contact circuit board 33. After installing the circuit component 3 in the circuit component installation groove 213, heat-conducting glue is poured to make the circuit component 3 and the male adapter flange 2 an integral body, ensuring the temperature conduction efficiency.

[0041] Further, the circuit component installation groove 213 includes a circuit board installation groove 2131 and a switch installation groove 2132. The contact circuit board 33 is installed on the circuit board installation groove 2131. There is an oval hole in the circuit board installation groove 2131. The circuit board installation groove 2131 is located above the switch installation groove 2132, and the normally closed temperature switch 34 is installed in the switch installation groove 2132.

[0042] Further, the head of the first spring contact point 31 faces the inner side of the circuit board installation groove 2131, passes through the oval hole in the groove, and elastically contacts the first contact ring 13, and a compression spring is built in. The head of the first spring contact point 31 faces the inner side of the circuit board installation groove 2131, passes through the oval hole in the groove, and elastically contacts the second contact ring 14, and a compression spring is built in.

[0043] Still further, the normally closed temperature switch 34 is thermally connected to the flange body through the switch installation groove 2132, and the wires at the top of the normally closed temperature switch 34 are electrically connected to the first spring contact point 31 and the second spring contact point 32 respectively. By setting the first spring contact point 31 to be electrically connected to the first contact ring 13 on the male head 1 and the second spring contact point 32 to be electrically connected to the second contact ring 14 on the male head 1, it is beneficial to transmit the temperature alarm signal subsequently. The heads of the first spring contact point 31 and the second spring contact point 32 are hemispherical structures, and the compression stroke of the compression spring is 1 - 2 mm, ensuring that the contact pressure with the first contact ring 13 and the second contact ring 14 is 1 - 2 N.

[0044] Further, a limit screw 4 is provided on the limit hole 214. The limit screw 4 is limited to the end of the limit inclined groove 12 through the limit hole 214. After the limit screw 4 is tightened, the threaded length protruding from the inner wall arc surface of the installation cavity 212 of the adapter flange body 21 is less than the depth of the limit inclined groove 12. The end of the limit screw 4 does not contact the bottom surface of the limit inclined groove 12 after being tightened, only preventing the male head 1 from rotating. And when the limit screw 4 is screwed in and locked, its nut sinks into the adapter flange body 21, and the nut of the limit screw 4 is lower than the outer wall arc surface of the adapter flange body 21.

[0045] Furthermore, the installation cavity 212 cooperates with the male head 1, and three pin holes 5 are evenly distributed along the circumferential direction at the same height on its inner wall. The pin holes 5 penetrate through the side wall of the flange body. Three locking pins are installed in the pin holes 5 by interference fit. The outer ends of the locking pins are lower than the outer wall arc surface of the adapter flange body 21, and the inner ends of the locking pins protrude from the inner wall arc surface of the installation cavity 212 of the adapter flange body 21. The length of the protruding part is less than the depth of the inclined groove 11 on the outer wall of the male head 1 for inserting into the inclined groove 11 on the outer wall of the male head 1. The locking pins are made of stainless steel, which can not only meet the strength requirements but also have no hidden danger of oxidation and chip removal.

[0046] The axial distance from the center point of the pin hole 5 to the axial positioning surface 2111 meets the position requirements of the theoretical light-emitting point in the male head 1 on the main optical axis. Taking the axial positioning surface 2111 as the axial position reference, the first coaxial positioning surface 2112 as the coaxial positioning reference, and the end face sealing surface 2113 as the O-ring contact surface, it is fixedly connected to the rear component.

[0047] Furthermore, O-ring seals 6 are installed in multiple annular grooves 221. By setting the O-ring seals 6, it is beneficial to seal the gap between the locking cone 22 and the flange body 21, improve airtightness, and at the same time increase friction to prevent loosening during use in a vibration environment.

[0048] After the locking cone 22 is screwed into the flange body 21, the second coaxial positioning surface 222 and the inner wall positioning surface of the adapter flange body 21 form a clearance fit, and the clearance fit range is kept within 0.02 mm - 0.06 mm. The small clearance fit can greatly reduce the coaxial positioning error of the conical surface 9 of the locking cone.

[0049] Furthermore, positioning reference points 7 are provided on the flange installation positioning surface 211. The positioning reference points 7 are aligned with the pin holes 5 close to the limit screw 4. The positioning reference points 7 are used to indicate the insertion direction of the male head 1 so that the positions of the locking pins correspond to the inclined grooves 12 of the male head 1.

[0050] Furthermore, the trigger threshold of the normally closed temperature switch 34 is 30 - 70 °C. When the temperature exceeds the threshold, the conductive metal sheet inside the normally closed temperature switch 34 deforms, cutting off the conduction circuit between the first spring contact point 31 and the second spring contact point 32 and the first contact ring 13 and the second contact ring 14.

[0051] Furthermore, flange screw holes 8 are also provided on the flange installation positioning surface 211. The number of the flange screw holes 8 is 4 - 8, and they are evenly distributed along the circumferential direction.

[0052] It should be noted that the operation process of the present invention is as follows: First, press three stainless-steel locking pins into the pin holes 5 with interference to ensure that the axis of the pins is perpendicular to the axis of the flange body, and the protrusion tolerance is ±0.1 mm. Subsequently, install O-ring seals 6 in the two annular grooves 221 on the outer cylindrical surface of the locking cone 22. After ensuring that the seals are not twisted, screw the locking cone 22 into the lower end of the adapter flange body 21. Align the male head 1 with the positioning reference point 7 and insert it into the installation cavity 212 of the adapter flange body 21, and then rotate it clockwise by 30°. Make the inner ends of the three locking pins completely enter the inclined grooves 11 of the male head 1. Then screw the limit screw 4 into the end of the limit inclined groove 12 of the male head 1. The end of the limit screw 4 does not tightly abut against the bottom surface of the inclined groove 12. The outer ends of the locking pins are lower than the outer wall arc surface of the adapter flange body 21. At this time, there is still a slightly small gap and a slight looseness between the male head 1 and the male head adapter flange 2. Then use a torque wrench to tighten the cone 22 clockwise by borrowing the wrench position 223 on the locking cone. The locking cone 22 moves upward, and the inner conical surface 9 of the locking cone 22 is in full contact with the conical surface of the male head 1. Tighten the cone 22 at a certain torque until the three inclined groove surfaces on the male head 1 are in full contact with the protruding parts of the three locking pins and are locked to form a stable clamping force, completing the locking of the male head 1. After locking and fixing the male head adapter flange 2 and the male head 1, the entire optical fiber can be connected and fixed to other rear mounting seats through the flange screw holes 8 on the flange mounting positioning surface 211. The male head adapter flange 2 of different sizes and models can also be made according to different situations;

[0053] Trigger alarm: During the use of the optical fiber, when the light output of the optical fiber output head is abnormal and the temperature rises, the heat is transferred to the normally closed temperature switch 34 on the adapter flange body 21. After the internal temperature of the switch reaches above the trigger threshold, the conductive metal in the internal passage will deform. The electrical connection between the wire of the normally closed temperature switch 34 and the first spring contact point 31 and the second spring contact point 32 is disconnected, resulting in the disconnection of the electrical connection between the spring contact points and the first contact ring 13 and the second contact ring 14 on the male head 1. The signal cannot be transmitted to the laser through the wire inside the optical fiber. Finally, due to the disconnection of the passage, the electrical signal cannot be transmitted normally, realizing the trigger of the open-circuit alarm signal by the temperature control switch at high temperature;

[0054] As Figure 10 shown: It is the connection method of the wire of the normally closed temperature switch 34 with the first spring contact point 31 and the second spring contact point 32. In addition, this connection method is not unique;

[0055] The above-mentioned QBH optical fiber output head connection system, through the mutual cooperation of the male head adapter flange 2, the inclined grooves 11 and the contact rings on the male head 1 of the QBH optical fiber output head, has the following beneficial effects:

[0056] Improved mechanical reliability: By using the characteristics of being fixed with locking pins and having a short cantilever, there is no risk of fracture, jamming failure is avoided, the locking method is simple, the locking state is stable without loosening, and the anti-seismic and anti-fatigue effects are remarkable;

[0057] Adaptability and sealing: The single-layer flange structure has fewer pores, and together with the O-ring 6, it achieves IP65-level dust-proof sealing;

[0058] Assembly and maintenance efficiency: The number of assembly steps is reduced by 3 - 4 steps, and it supports quick disassembly and assembly within 30 seconds; The temperature monitoring function enables fault warning and reduces maintenance costs, which is beneficial to production and processing requirements.

[0059] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0060] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A QBH fiber optic output head connection system, comprising a male head of the QBH fiber optic output head and a male head adapter flange, wherein the male head adapter flange is sleeved on the male head, and is characterized in that, The male head is provided with a plurality of inclined grooves, and at least one of the plurality of inclined grooves is a limiting inclined groove with a length greater than that of other inclined grooves. The male head is further provided with a first contact ring and a second contact ring. The male head adapter flange includes an adapter flange body and a locking cone. The locking cone is threadedly connected to the bottom of the adapter flange body. The top of the adapter flange body is provided with a flange installation positioning surface, which includes an axial positioning surface, a first coaxial positioning surface, and an end face sealing surface. An installation cavity is provided inside the adapter flange body, and a circuit component installation groove is provided on one side of the adapter flange body, and a limiting hole is provided on the other side. The locking cone is a hollow cylindrical shape. The inner side of the upper end of the locking cone is provided with a downward-converging inner conical surface, and the lower end is provided with a coaxial positioning surface. A plurality of annular grooves are provided on the locking cone. A circuit component is provided on the circuit component installation groove. The circuit component includes a first spring contact point, a second spring contact point, a contact circuit board, and a normally closed temperature switch. The first spring contact point and the second spring contact point are both welded to the contact circuit board.

2. The QBH fiber optic output head connection system according to claim 1, wherein, The circuit component installation groove includes a circuit board installation groove and a switch installation groove. The contact circuit board is installed on the circuit board installation groove, and the normally closed temperature switch is installed in the switch installation groove.

3. The QBH fiber optic output head connection system according to claim 2, characterized in that, The head of the first spring contact point faces the inside of the circuit board installation groove and elastically contacts the first contact ring, and a built-in compression spring is provided. The head of the second spring contact point faces the inside of the circuit board installation groove and elastically contacts the second contact ring, and a built-in compression spring is provided.

4. A QBH fiber optic output head connection system according to claim 3, characterized in that The normally closed temperature switch is thermally connected to the flange body through the switch installation groove, and both ends of the top of the normally closed temperature switch are electrically connected to the first spring contact point and the second spring contact point through wires respectively.

5. A QBH fiber optic output head connection system according to claim 1, characterized in that, A limiting screw is provided on the limiting hole, and the limiting screw is limited at the end of the limiting inclined groove through the limiting hole.

6. The QBH fiber optic output head connection system according to claim 5, wherein, The installation cavity is matched with the male head, and at least three pin holes are evenly distributed along the circumference on its inner wall, and the pin holes penetrate through the side wall of the flange body.

7. A QBH fiber optic output head connection system according to claim 1, characterized in that, O-ring seals are installed in a plurality of the annular grooves.

8. A QBH fiber optic output head connection system according to claim 1, characterized in that, A positioning reference point is provided on the flange installation positioning surface.

9. A QBH fiber optic output head connection system according to any one of claims 1-8, characterized in that, The triggering threshold of the normally closed temperature switch is 30 - 70 °C.

10. A QBH fiber optic output head connection system according to any one of claims 1-8, characterized in that, Flange screw holes are further provided on the flange installation positioning surface, and the number of the flange screw holes is 4 - 8, and they are evenly distributed along the circumference.

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