Multi-fiber connection device and preparation method thereof

Abstract

The present invention application relates to a multi-fiber connection device and a preparation method thereof, belonging to the technical field of multi-fiber connection, the multi-fiber connection device comprising: an optical fiber unit is located on a support unit, a pressing unit is located above the support unit and presses part of the optical fiber unit onto the support unit; a fixing unit fixes the optical fiber unit on the support unit; a groove portion penetrates the side walls of the support unit and the pressing unit along a first direction and / or a second direction, the end face of the end of the optical fiber unit is away from the side wall of the support unit, a film layer is arranged on the end face of the end of the optical fiber unit, and the first direction and the second direction intersect. The multi-fiber connection device of the present invention application can avoid the risk of cracking and falling off of the end face coating layer of the bare fiber part of the optical fiber unit caused by adhesives such as glue, will not pollute the internal space formed by the multi-fiber connection device and other optical communication components, and also ensures the transmission performance of the optical fiber signal, and improves the communication quality of the entire optical fiber network.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber connection, and in particular to an optical fiber connection device and a preparation method thereof. Background Art

[0002] In the existing multi-fiber connector technology field, a multi-fiber connection device generally includes multiple optical fibers 1, which can generally be installed on a capillary 3 by a common V-groove 4, a cover plate 2, and glue connection method. Multiple optical fibers 1 are arranged in an array on the capillary 3. The optical fiber 1 includes a cladding portion 11 and a bare fiber portion 12. Multiple cladding portions 11 are arranged in an array on the base of the capillary 3 and bonded to the base of the capillary by glue. Multiple bare fiber portions 12 are arranged in an array in the V-groove 4 of the capillary 3. Glue (or other adhesives) is filled between the V-groove 4 and the bare fiber portion 13. The cover plate 1 is pressed and fitted with the V-groove 4 to press and bond the multiple optical fibers 1 in the V-groove 4.

[0003] Generally speaking, under microscope observation, the bare fiber portion 12 of each optical fiber 1 can be placed in the V-groove on the capillary 3. After confirming that the bare fiber portions 12 of the multiple optical fibers 1 are in the V-groove, glue or other adhesives can be applied. Then, the cover plate 1 is placed so that the cover plate 1 and the V-groove 4 are pressed tightly together, and then the multiple optical fibers 1 are stably bonded and arranged in the V-groove 4. The side of the capillary 3 is ground, polished, ultrasonically cleaned, and coated. Then, the grinding, polishing, and coating of the glue end face and the end face of the bare fiber portion 12 are also completed, thereby completing the preparation of the multi-fiber connection device.

[0004] However, after the preparation of the multi-fiber connection device is completed, due to the different materials of the glue and the optical fiber between the V-groove and the cover plate, there may be a difference in the flatness of the glue end face and the end face of the bare optical fiber after grinding, and the expansion coefficients of the glue and the optical fiber are different. After long-term reliability, the coating layer formed after the coating of the glue end face will be at risk of cracking and falling off. The cracked and fallen coating layer will contaminate the internal space formed by the multi-fiber connection device and other optical communication components, and will also affect or even block the transmission performance of the optical fiber signal, thereby affecting the communication quality of the entire optical fiber network. These have become technical problems that urgently need to be solved in the existing field of multi-fiber connector technology. Summary of the invention

[0005] The purpose of the present invention application is to overcome the defects existing in the prior art, to provide a multi-fiber connection device and a preparation method thereof, so as to partially or completely solve the technical problems in the field of the prior art of multi-fiber connectors, that the flatness of the glue end face after grinding and the end face of the bare optical fiber are different, and the coating layer formed after the glue end face is coated will have the risk of cracking and falling off, and the cracked and fallen coating layer will pollute the internal space formed by the multi-fiber connection device and other optical communication components, and will also affect or even block the transmission performance of the optical fiber signal, thereby affecting the communication quality of the entire optical fiber network. In order to achieve the above purpose, the present invention application provides the following technical solutions:

[0006] In a first aspect, the present invention provides a multi-fiber connection device, comprising: a supporting unit, an optical fiber unit, a pressing unit, and a fixing unit, wherein the optical fiber unit is located on the supporting unit, the pressing unit is located above the supporting unit and presses part of the optical fiber unit onto the supporting unit; the fixing unit fixes the optical fiber unit to the supporting unit; a groove portion penetrates the side walls of the supporting unit and the pressing unit along a first direction and / or a third direction, an end face of an end portion of the optical fiber unit is away from the side wall of the supporting unit, and a film layer is arranged on the end face of the end portion of the optical fiber unit.

[0007] Optionally, the optical fiber unit includes a first optical fiber portion and a second optical fiber portion, the first optical fiber portion includes a plurality of first optical fibers, the first optical fiber includes a first cladding portion and a first bare fiber portion, the second optical fiber portion includes a plurality of second optical fibers, the second optical fiber includes a second cladding portion and a second bare fiber portion; the first cladding portion is located above the first cladding portion, the first bare fiber portion and the second bare fiber portion are arranged in sequence on the supporting unit, and the pressing unit presses the first bare fiber portion and the second bare fiber portion on the supporting unit.

[0008] Optionally, the groove portion includes a first groove portion and a second groove portion, the first groove portion and the second groove portion are connected, the first groove portion penetrates the side wall of the support unit along the first direction, and the second groove portion correspondingly penetrates the side wall of the pressing unit along the first direction; the support unit includes a first support portion, a first mounting portion, and a first limiting portion, the first mounting portion is connected to the first support portion, the first limiting portion is connected to the first support portion, the first limiting portion includes a limiting portion 1 and a limiting portion 2, the limiting portion 1 and the limiting portion 2 are located on both sides of the optical fiber unit and limit part of the optical fiber unit, the first mounting portion includes a first mounting groove, the first mounting groove is used to install the first bare fiber portion and the second bare fiber portion, and the membrane layer is arranged on the end surfaces of multiple first bare fiber portions and multiple second bare fiber portions;

[0009] And / or, before the film layer is arranged on the end faces of the plurality of first bare fiber parts and the plurality of second bare fiber parts, the groove part is provided with a first adhesive layer of a certain thickness or a thickness range, and the cross section of the first adhesive layer is a rectangular or trapezoidal structure when projected along the first direction; the groove part is a rectangular parallelepiped structure, and the multi-fiber connection device includes a first height-to-distance ratio HD and a first thickness-to-distance ratio TD, HD=H / D, TD=T / D, wherein H is the height of the groove part along the third direction, T is the thickness or the thickness range of the first adhesive layer along the second direction, and D is the distance or the distance range from the end face of the end of the optical fiber unit to the side wall of the support unit along the second direction, and the first direction, the second direction, and the third direction intersect with each other;

[0010] Optionally, the groove portion includes a first groove portion and a second groove portion, the first groove portion and the second groove portion are connected, the first groove portion penetrates the side wall of the support unit along the first direction, and the second groove portion correspondingly penetrates the side wall of the pressing unit along the third direction; the support unit includes a second support portion, a second mounting portion, and a second limiting portion, the second mounting portion is connected to the second support portion, the second limiting portion is connected to the second support portion, the second limiting portion includes a limiting portion three and a limiting portion four, the limiting portion three and the limiting portion four are located on both sides of the optical fiber unit and limit part of the optical fiber unit, the second mounting portion includes a second mounting groove, the second mounting groove is used to mount the first bare fiber portion and the second bare fiber portion, and the membrane layer is arranged on the end surfaces of the plurality of first bare fiber portions and the plurality of first bare fiber portions;

[0011] And / or, before the film layer is arranged on the end faces of the plurality of first bare fiber parts and the plurality of second bare fiber parts, a second adhesive layer of a certain thickness or a thickness range is arranged on the groove part, and the cross section of the second adhesive layer is a rectangular or trapezoidal structure when projected perpendicular to the second direction; the groove part is a rectangular parallelepiped structure, and the multi-fiber connection device includes a first length-to-distance ratio LD and a second thickness-to-distance ratio PD, LD=L / D, PD=P / D, wherein L is the length of the groove part along the first direction, P is the thickness or the thickness range of the second adhesive layer along the second direction, and D is the distance or the distance range from the end face of the end of the optical fiber unit to the side wall of the support unit along the second direction, and the first direction, the second direction, and the third direction intersect with each other;

[0012] Optionally, the groove portion includes a groove sub-portion 1 and a groove sub-portion 2, the groove sub-portion 1 and the groove sub-portion 2 are connected, the groove sub-portion 1 penetrates the side wall of the support unit and the side wall of the pressing unit along a first direction, and the groove sub-portion 2 correspondingly penetrates the side wall of the support unit and the side wall of the pressing unit along a third direction; the support unit includes a support portion, an installation portion, and a positioning portion, the installation portion is connected to the support portion, the positioning portion is connected to the support portion, the positioning portion includes a positioning portion 1 and a positioning portion 2, the positioning portion 1 and the positioning portion 2 are located on both sides of the optical fiber unit and position part of the optical fiber unit, the installation portion includes an installation groove, the installation groove installs the first bare fiber portion and the second bare fiber portion, and the membrane layer is arranged on the end surfaces of multiple first bare fiber portions and multiple second bare fiber portions;

[0013] And / or, before the membrane layer is arranged on the end faces of multiple first bare fiber parts and multiple second bare fiber parts, an adhesive layer with a certain thickness or thickness range is arranged on the groove part. Projected along the second direction, the cross-section of the adhesive layer is a cross-shaped structure, the groove part is a cross-cube structure, the groove sub-part one is a rectangular structure, the groove sub-part two is a rectangular structure, and the multi-fiber connection device includes a height-to-distance ratio SHD, a length-to-distance ratio SLD, and a thickness-to-distance ratio SSD, SHD=SH / D, SLD=SL / D, SSD=SS / D, wherein SH is the height of the groove sub-part one along the third direction, SL is the length of the groove sub-part two along the first direction, SS is the thickness or thickness range of the adhesive layer along the second direction, and D is the distance or distance range of the end face of the end of the optical fiber unit away from the side wall of the supporting unit along the second direction, and the first direction, the second direction, and the third direction intersect with each other.

[0014] Optionally, the multi-fiber connection device includes a first coefficient HT, the first coefficient HT=HD+TD-H / L1, satisfying: 1.0≤HT≤3.0, wherein L1 is the length of the groove portion along the first direction; or, the multi-fiber connection device includes a second coefficient LP, the second coefficient LP=LD+TD-L / H1, satisfying: 1.0≤LT≤3.0, wherein H1 is the height of the groove portion along the third direction; or, the multi-fiber connection device includes a coefficient HLS, the coefficient HLS=SHD+SLD+2SS / D-SH / L2-SL / H2, satisfying: 1.0≤HLS≤5.0, wherein L2 is the length of the groove sub-portion one along the first direction, and H2 is the height of the groove sub-portion two along the third direction.

[0015] In a second aspect, the present invention provides a method for preparing a multi-fiber connection device, using any of the multi-fiber connection devices described in the first aspect, comprising the following steps:

[0016] S100: installing the optical fiber unit on the supporting unit, with the end of the optical fiber unit being located in the groove;

[0017] S200: The pressing unit presses part of the optical fiber unit onto the supporting unit, and the fixing unit fixes the optical fiber unit onto the supporting unit;

[0018] S300: The end face of the end of the optical fiber unit is at least ground, and the groove portion is formed with a first adhesive layer or a second adhesive layer or an adhesive layer. The end of the optical fiber unit where the first adhesive layer or the second adhesive layer or the adhesive layer is not provided and the first adhesive layer or the second adhesive layer or the adhesive layer are plated to form a film layer.

[0019] S400: After removing the first adhesive layer or the second adhesive layer or the adhesive layer, a film layer is formed on the end surface of the end of the optical fiber unit, and the preparation for the multi-optical optical fiber connection is completed.

[0020] Optionally, the step S100 includes:

[0021] Step S101: installing the optical fiber unit on the supporting unit, with the end of the optical fiber unit located in the groove;

[0022] Step S102: The end of the optical fiber unit and the side wall of the supporting unit close to the end of the optical fiber unit form a first distance or a first distance range.

[0023] And / or, the step S200 includes:

[0024] Step S201: The pressing unit presses part of the optical fiber unit onto the supporting unit;

[0025] Step S202: The fixing unit fixes the optical fiber unit on the supporting unit.

[0026] Optionally, step S300 includes:

[0027] Step S301: performing at least a grinding process on the end surface of the end of the optical fiber unit;

[0028] Step S302: the groove portion is formed with a first adhesive layer or a second adhesive layer or an adhesive layer, and the end of the optical fiber unit not provided with the first adhesive layer or the second adhesive layer or an adhesive layer and the first adhesive layer or the second adhesive layer or an adhesive layer are plated to form a film layer;

[0029] Step S302 includes:

[0030] Step S3021: the groove portion is coated with an adhesive or an adhesive film is adhered to form a first adhesive layer or a second adhesive layer or an adhesive layer, the multiple first bare fiber portion ends and the multiple second bare fiber portion ends are not coated with an adhesive or an adhesive film is adhered, the multiple first bare fiber portion ends and the multiple second bare fiber portion ends will not be provided with the first adhesive layer or the second adhesive layer or an adhesive layer, and the maximum thickness of the first adhesive layer or the second adhesive layer or an adhesive layer is less than the first distance or the first distance range;

[0031] Step S3022: coating the plurality of first bare fiber portions and the plurality of second bare fiber portions without the first adhesive layer or the second adhesive layer or the adhesive layer and the first adhesive layer or the second adhesive layer or the adhesive layer to form a film layer.

[0032] Optionally, when the groove portion is formed with a first adhesive layer, the groove portion is a rectangular parallelepiped structure, and the multi-fiber connection device includes a first height-to-distance ratio HD and a first thickness-to-distance ratio TD, HD=H / D, TD=T / D, wherein H is the height of the groove portion along the third direction, T is the thickness or thickness range of the first adhesive layer along the second direction, and D is the distance or distance range of the end face of the end of the optical fiber unit away from the side wall of the supporting unit along the second direction, and the first direction, the second direction, and the third direction intersect each other;

[0033] Or, when the groove portion is formed with a second adhesive layer, the groove portion is a rectangular parallelepiped structure, and the multi-fiber connection device includes a first length-to-distance ratio LD and a second thickness-to-distance ratio PD, LD=L / D, PD=P / D, wherein L is the length of the groove portion along the first direction, P is the thickness or thickness range of the second adhesive layer along the second direction, and D is the distance or distance range from the end face of the end of the optical fiber unit to the side wall of the support unit along the second direction, and the first direction, the second direction, and the third direction intersect each other;

[0034] Or, when the groove portion is formed with an adhesive layer, the groove portion is a cross cube structure, the groove sub-portion 1 is a rectangular parallelepiped structure, the groove sub-portion 2 is a rectangular parallelepiped structure, and the multi-fiber connection device includes a height ratio SHD, a length ratio SLD, and a thickness ratio SSD, SHD=SH / D, SLD=SL / D, SSD=S / D, wherein SH is the height of the groove sub-portion 1 along the third direction, SL is the length of the groove sub-portion 2 along the first direction, SS is the thickness or thickness range of the adhesive layer along the second direction, and D is the distance or distance range of the end face of the end of the optical fiber unit away from the side wall of the support unit along the second direction, and the first direction, the second direction, and the third direction intersect each other. In summary, the present invention application has the following beneficial technical effects:

[0035] (1) The pressing unit presses the multiple first bare fiber ends and the multiple second bare fiber ends of the optical fiber unit onto the supporting unit, and the fixing unit fixes the multiple first optical fibers and the multiple second optical fibers of the optical fiber unit onto the supporting unit. In this way, the installation of the optical fiber unit can be completed to form a multi-optical fiber connection device for subsequent optical fiber signal transmission and communication.

[0036] (2) The groove portion can be coated with an adhesive or a film can be adhered to form an adhesive layer, and the multiple first bare fiber portion ends are not coated with an adhesive. The multiple first bare fiber portion ends and the multiple second bare fiber portion ends can be subjected to a coating treatment. After the coating is completed, the adhesive layer can be manually removed and the film layer can be set on the multiple first bare fiber portion ends and the multiple second bare fiber portion ends, without affecting the effect of the coating treatment of the multiple first bare fiber portion ends and the multiple second bare fiber portion ends on the supporting unit and the pressing unit.

[0037] (3) There is a certain distance between the end face of adhesives such as glue and the end face of the bare fiber part of the optical fiber unit. The end face of adhesives such as glue and the end face of the bare fiber part of the optical fiber unit will not affect each other. Even if the expansion coefficients of glue and optical fiber are different, there is a certain distance between the coating layers of the glue end face and the bare fiber part of the optical fiber unit. They will not affect each other. Adhesives such as glue will not cause the risk of cracking or falling off of the coating layer on the end face of the bare fiber part of the optical fiber unit, and will not pollute the internal space formed by the multi-fiber connection device and other optical communication components. It also ensures the transmission performance of optical fiber signals and improves the communication quality of the entire optical fiber network. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of a multi-fiber connector in the prior art;

[0039] Figure 2 The structure of a multi-fiber connection device according to an embodiment of the present invention is shown in FIG. Figure 1 ;

[0040] Figure 3 The structure of a multi-fiber connection device according to an embodiment of the present invention is shown in FIG. Figure 2 ;

[0041] Figure 4 The structure of a multi-fiber connection device according to an embodiment of the present invention is shown in FIG. Figure 3 ;

[0042] Figure 5 It is a structural schematic diagram of a support unit according to an embodiment of the present invention;

[0043] Figure 6 is a schematic structural diagram of a first adhesive layer according to an embodiment of the present invention;

[0044] Figure 7 The structure of a multi-fiber connection device according to an embodiment of the present invention is shown in FIG. Figure 4 ;

[0045] Figure 8 The structure of a multi-fiber connection device according to another embodiment of the present invention is shown in FIG. Figure 1 ;

[0046] Fig. 9 The structure of a multi-fiber connection device according to another embodiment of the present invention is shown in FIG. Figure 2 ;

[0047] Fig.10 The structure of a multi-fiber connection device according to another embodiment of the present invention is shown in FIG. Figure 3 ;

[0048] Fig.11 is a structural schematic diagram of a support unit of another embodiment of the present invention;

[0049] Fig.12 is a schematic diagram of the structure of the second adhesive layer of another embodiment of the present invention;

[0050] Fig.13 The structure of a multi-fiber connection device according to another embodiment of the present invention is shown in FIG. Figure 4 ;

[0051] Fig.14is a schematic diagram of the cross-sectional structure of a groove portion of another embodiment of the present invention;

[0052] Reference numerals:

[0053] Support unit-100, 600, optical fiber unit-200, pressing unit-300, 700, fixing unit-500, first supporting part-101, limiting part one-102, limiting part two-103, first mounting part-104, side wall-107 of supporting unit, first groove part-106, 606, second groove part-301, 701, second supporting part-601, limiting part three-602, limiting part four-603, second mounting part-104, first cladding part-201, first bare fiber part-202, second cladding part-203, second bare fiber part 204. DETAILED DESCRIPTION

[0054] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0055] Reference Figure 1-Figure 14 As shown, in the first aspect, the present invention application provides a multi-fiber connection device, including: a supporting unit, an optical fiber unit 200, a pressing unit, and a fixing unit 500, the optical fiber unit 200 is located on the supporting unit, the pressing unit is located above the supporting unit and presses part of the optical fiber unit 200 onto the supporting unit; the fixing unit 500 fixes the optical fiber unit 200 on the supporting unit; the groove portion penetrates the side walls of the supporting unit and the pressing unit along the first direction and / or the third direction, the end face of the end of the optical fiber unit 200 is away from the side wall of the supporting unit, the film layer is arranged on the end face of the end of the optical fiber unit 200, and the first direction and the third direction intersect.

[0056] In the present application, the multi-fiber connection device includes: a supporting unit, an optical fiber unit 200, a pressing unit, and a fixing unit 500. The optical fiber unit 200 is located on the supporting unit. The pressing unit is located above the supporting unit and presses part of the optical fiber unit 200 onto the supporting unit. The fixing unit 500 fixes the optical fiber unit 200 on the supporting unit. Exemplarily, the optical fiber unit 200 is located on the supporting unit, and the pressing unit is located above the supporting unit and presses part of the optical fiber unit 200 onto the supporting unit. Before the pressing unit presses part of the optical fiber unit 200 onto the supporting unit, glue or other adhesives can be set between the pressing unit and the supporting unit. However, the pressing unit presses part of the optical fiber unit 200 onto the supporting unit. These are existing technologies in the field of multi-fiber connector technology, and the present invention application will not be repeated here. At the same time, after the pressing unit presses part of the optical fiber unit 200 onto the supporting unit, the fixing unit 500 can fix the optical fiber unit 200 on the supporting unit, and glue or other adhesives can be used to fix the optical fiber unit 200 on the supporting unit. In this way, the installation of the optical fiber unit 200 can be completed to form a multi-fiber connection device for subsequent optical fiber signal transmission and communication.

[0057] In the present application, the groove portion can penetrate the side wall of the support unit and the pressing unit along the first direction and / or the third direction, the end face of the end of the optical fiber unit 200 is away from the side wall of the support unit, and the film layer is arranged on the end face of the end of the optical fiber unit 200. In this way, there is a certain distance between the end face of the adhesive such as glue and the end face of the optical fiber unit 200, and the end face of the adhesive such as glue and the end face of the optical fiber unit 200 will not affect each other. Even if the expansion coefficients of the glue and the optical fiber are different, there is a certain distance between the end face of the glue and the coating layer of the end face of the optical fiber unit 200 after coating, and they also do not affect each other. The adhesive such as glue will not cause the risk of cracking and falling off of the end face coating layer of the optical fiber unit 200, and will not pollute the internal space formed by the multi-fiber connection device and other optical communication components, and also ensure the transmission performance of the optical fiber signal, and improve the communication quality of the entire optical fiber network.

[0058] Optionally, the optical fiber unit 200 includes a first optical fiber portion 20U and a second optical fiber portion 20D, the first optical fiber portion 20U includes multiple first optical fibers, the first optical fiber includes a first cladding portion 201 and a first bare fiber portion 202, the second optical fiber portion 20D includes multiple second optical fibers, the second optical fiber includes a second cladding portion 203 and a second bare fiber portion 204; the first cladding portion 201 is located above the first cladding portion 203, the first bare fiber portion 202 and the second bare fiber portion 204 are arranged in sequence on the supporting unit, and the pressing unit presses the first bare fiber portion 202 and the second bare fiber portion 204 on the supporting unit.

[0059] Specifically, the optical fiber unit 200 includes a first optical fiber portion 20U and a second optical fiber portion 20D, the first optical fiber portion 20U includes a plurality of first optical fibers, the first optical fiber includes a first cladding portion 201 and a first bare fiber portion 202, the second optical fiber portion 20D includes a plurality of second optical fibers, the second optical fiber includes a second cladding portion 203 and a second bare fiber portion 204; the first cladding portion 201 is located above the second cladding portion 203, the first bare fiber portion 202 and the second bare fiber portion 204 are arranged in sequence on the supporting unit, and the pressing unit presses the plurality of first bare fiber portions 202 and the plurality of second bare fiber portions 204 on the supporting unit, so that the pressing unit can press part of the optical fiber unit 200 on the supporting unit. Furthermore, a plurality of V-grooves may be provided on the support unit, and the plurality of V-grooves may be connected continuously or arranged at intervals, and the first bare fiber portion 202 and the second bare fiber portion 204 are sequentially arranged in the plurality of V-grooves on the support unit, and then the pressing unit presses the first bare fiber portion 202 and the second bare fiber portion 204 onto the support unit, thereby ensuring that the optical fiber unit 200 installs the plurality of first bare fiber portions 202 and the plurality of second bare fiber portions 204 on the support unit.

[0060] Optionally, the groove portion includes a first groove portion and a second groove portion, the first groove portion and the second groove portion are connected, the first groove portion passes through the side wall of the support unit along the first direction, and correspondingly, the second groove portion passes through the side wall of the pressing unit along the first direction; the support unit 100 includes a first support portion 101, a first mounting portion 104, and a first limiting portion, the first mounting portion 104 is connected to the first support portion 101, the first limiting portion is connected to the first support portion 101, the first limiting portion includes a limiting portion 102 and a limiting portion 103, the limiting portion 102 and the limiting portion 103 are located on both sides of the optical fiber unit 200 and limit part of the optical fiber unit 200, the first mounting portion 104 includes a first mounting groove 105, the first mounting groove installs the first bare fiber portion 202 and the second bare fiber portion 204, and the first groove portion 106 passes through the side wall 107 of the support unit 100 near the ends of multiple first bare fiber portions 202 and multiple second bare fiber portions 203 along the first direction.

[0061] Specifically, the support unit 100 includes a first support portion 101, a first installation portion 104, and a first limiting portion. The first installation portion 104 is connected to the first support portion 101, and the first limiting portion is connected to the first support portion 101. The first limiting portion includes a limiting portion 102 and a limiting portion 103. The limiting portion 102 and the limiting portion 103 are located on both sides of the optical fiber unit 200 and limit part of the optical fiber unit 200. This makes it easy to pre-position the optical fiber unit 200 to ensure the subsequent installation of the optical fiber unit 200 on the support unit 100.

[0062] The first mounting portion 104 may include a first mounting groove, in which the first bare fiber portion 202 and the second bare fiber portion 204 are mounted. The first mounting groove 105 may be a V-shaped groove, a circular groove, an elliptical groove, etc. There may be multiple first mounting grooves 105, and multiple first bare fiber portions 202 and multiple second bare fiber portions 204 are sequentially mounted in multiple first mounting grooves 105. The first groove portion 106 penetrates the side wall 107 of the support unit 100 near the ends of the multiple first bare fiber portions 202 and the ends of the multiple second bare fiber portions 204 along the first direction.

[0063] Optionally, the second groove portion 301 penetrates the side wall of the pressing unit 300 near the ends of the multiple first bare fiber portions 202 and the ends of the multiple second bare fiber portions 203 along the first direction, and the membrane layer is arranged on the end surfaces of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203; before the membrane layer is arranged on the end surfaces of the multiple first bare fiber portions and the multiple second bare fiber portions, the groove portion is provided with a first adhesive layer 400 of a certain thickness or thickness range, and the cross-section of the first adhesive layer 400 is a rectangular or trapezoidal structure, and after the membrane layer is arranged on the end surfaces of the multiple first bare fiber portions and the multiple second bare fiber portions, the first adhesive layer is removed.

[0064] Specifically, the first groove portion 106 penetrates the side wall of the support unit 100 near the ends of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 along the first direction, and the second groove portion 301 penetrates the side wall of the pressing unit 300 near the ends of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 along the first direction. The first groove portion 106 and the second groove portion 301 are connected, thereby forming a groove portion, and the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 can be located in the groove portion, and the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 will be away from the side wall 107 of the support unit 100 near the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 to form a distance D or a distance range D, and the groove portion An adhesive may be applied or an adhesive film may be pasted to form a first adhesive layer 400, and no adhesive is applied to the ends of the multiple first bare fiber parts 202. The thickness or thickness range T of the first adhesive layer is smaller than the distance D or the distance range D. After applying the adhesive, the ends of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 may be plated. After the coating is completed, the first adhesive layer may be manually removed and then the film layer may be set on the ends of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 without affecting the effect of the coating treatment of the ends of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 on the support unit 100 and the pressing unit 300. In this way, the end surface coating of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 may be reliably completed.

[0065] In the present application, projected along the first direction, the cross-section of the first adhesive layer 400 is a rectangular or trapezoidal structure. When the cross-section of the first adhesive layer 400 is a trapezoidal structure, the first adhesive layer 400 includes a first upper portion 401, a first lower portion 402, a first side portion 403, and a second side portion 404. The first upper portion 401, the first lower portion 402, the first side portion 403, and the second side portion 404 form a trapezoidal structure 405. In this way, the first adhesive layer 400 has a certain thickness or thickness range T.

[0066] Optionally, the groove portion is a rectangular structure, and the multi-fiber connection device includes a first height-to-distance ratio HD and a first thickness-to-distance ratio TD, HD=H / D, TD=T / D, wherein H is the height of the groove portion along the third direction, T is the thickness or thickness range of the first adhesive layer along the second direction, and D is the distance or distance range from the end face of the end of the optical fiber unit along the second direction away from the side wall of the supporting unit, and the first direction, the second direction, and the third direction intersect with each other.

[0067] Exemplarily, the groove portion is a rectangular parallelepiped structure, and the groove portion includes a length direction, a width direction, and a height direction. The length direction can be the X direction, the width direction can be the Y direction, and the height direction can be the Z direction. The X direction, the Y direction, and the Z direction intersect with each other, for example, the X direction, the Y direction, and the Z direction can be perpendicular to each other. The first direction is the length direction X of the groove portion, the second direction is the width direction Y of the groove portion, and the third direction is the height direction Z of the groove portion; at the same time, the first support portion 101 can be a rectangular parallelepiped, and the first support portion 101 also includes a length direction, a width direction, and a height direction. The length direction of the first support portion 101 can be the above-mentioned Y direction, the width direction of the first support portion 101 can be the above-mentioned X direction, and the height direction of the first support portion 101 can be the above-mentioned X direction. Similarly, the X direction, the Y direction, and the Z direction intersect with each other, for example, the X direction, the Y direction, and the Z direction can be perpendicular to each other. Accordingly, H can be the height of the groove portion along the third direction, and T can be the thickness or thickness range of the first adhesive layer along the second direction.

[0068] In the present application, it can be at least considered that: the end faces of the end portions of the multiple first bare fiber parts 202 and the end faces of the multiple second bare fiber parts 203 are basically flush, and accordingly, the distance or distance range D of the end face of the end portion of the optical fiber unit along the second direction away from the side wall of the supporting unit can be considered to be equal to the distance or distance range of the end faces of the end portions of the multiple first bare fiber parts 202 and the end faces of the multiple second bare fiber parts 203 away from the side wall of the supporting unit.

[0069] Optionally, the multi-fiber connection device includes a first coefficient HT, the first coefficient HT=HD+TD-H / L1, and satisfies: 1.0≤HT≤3.0, wherein L1 is the length of the groove portion along the first direction.

[0070] In the present application, by setting the first coefficient HT and the first height ratio HD, the groove portion can have a certain height limit, and at the same time be associated with H / L1, which can reduce the processing cost of the groove portion and facilitate manual removal of the first adhesive layer 400; the setting of the first thickness ratio TD can limit the thickness or thickness range of the first adhesive layer, which can reduce the production cost of the first adhesive layer 400 and facilitate manual removal of the first adhesive layer 400.

[0071] Optionally, the groove portion includes a first groove portion and a second groove portion, the first groove portion and the second groove portion are connected, the first groove portion passes through the side wall of the support unit along the first direction, and correspondingly the second groove portion passes through the side wall of the pressing unit along the third direction; the support unit 600 includes a second support portion 601, a second mounting portion 604, and a second limiting portion, the second mounting portion 604 is connected to the second support portion 601, the second limiting portion is connected to the second support portion 601, the second limiting portion includes a limiting portion three 602 and a limiting portion four 603, the limiting portion three 602 and the limiting portion four 603 are located on both sides of the optical fiber unit 200 and limit part of the optical fiber unit 200, the second mounting portion 604 includes a second mounting groove 605, the second mounting groove 605 installs the first bare fiber portion 202 and the second bare fiber portion 204, and the first groove portion 606 passes through the side wall of the support unit 100 near the ends of multiple first bare fiber portions 202 and multiple ends of second bare fiber portions 203 along the first direction.

[0072] Specifically, the support unit 600 includes a second support portion 601, a second mounting portion 604, and a second limiting portion. The second mounting portion 604 is connected to the second support portion 601, and the second limiting portion is connected to the second support portion 601. The second limiting portion includes a limiting portion three 602 and a limiting portion four 603. The limiting portion three 602 and the limiting portion four 603 are located on both sides of the optical fiber unit 200 and limit part of the optical fiber unit 200. This makes it easy to pre-position the optical fiber unit 200 to ensure the subsequent installation of the optical fiber unit 200 on the support unit 600.

[0073] In the present application, the second mounting portion 604 may include a second mounting groove 605, and the second mounting groove 605 is used to mount the first bare fiber portion 202 and the second bare fiber portion 204. Similarly, the second mounting groove 605 may be a V-shaped groove, a circular groove, an elliptical groove, etc. There may be multiple second mounting grooves 605, and multiple first bare fiber portions 202 and multiple second bare fiber portions 204 are sequentially mounted in multiple second mounting grooves 605. The first groove portion 606 penetrates the side wall of the support unit 100 near the end of the first bare fiber portion 202 along a first direction, and the second direction forms a second angle with the direction in which the first bare fiber portion 202 extends.

[0074] Optionally, the second groove portion 701 penetrates the side wall of the pressing unit 700 near the ends of the multiple first bare fiber portions 202 and the ends of the multiple second bare fiber portions 203 along the third direction, and the membrane layer is arranged on the end surfaces of the multiple first bare fiber portions 202 and the multiple first bare fiber portions 203; before the membrane layer is arranged on the end surfaces of the multiple first bare fiber portions and the multiple second bare fiber portions, the groove portion is arranged with a second adhesive layer of a certain thickness or thickness range, and the cross-section of the second adhesive layer is a rectangular or trapezoidal structure. After the membrane layer is arranged on the end surfaces of the multiple first bare fiber portions and the multiple second bare fiber portions, the second adhesive layer is removed.

[0075] Specifically, the first groove portion 606 penetrates the side wall of the support unit 600 near the ends of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 along the first direction, and the second groove portion 301 penetrates the side wall of the pressing unit 700 near the ends of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 along the third direction. The first groove portion 306 and the second groove portion 301 are connected, thereby forming a groove portion, and the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 will be located in the groove portion, and the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 will be away from the side wall of the support unit 600 near the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 to form a second distance D or a second distance range D. The groove portion can The second adhesive layer 800 is formed by applying an adhesive or sticking an adhesive film, and the ends of the multiple first bare fiber parts 202 are not coated with adhesive. The thickness or thickness range P of the second adhesive layer 800 is less than the distance D or the distance range D. After applying the adhesive, the ends of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 can be plated. After the coating is completed, the adhesive layer can be manually removed to complete the film layer setting on the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203, without affecting the influence of the coating treatment of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 on the support unit 600 and the pressing unit 700. In this way, the end surface coating of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 can be reliably completed.

[0076] In the present application, when projected along the first direction, i.e., projected perpendicular to the second direction, the cross-section of the second adhesive layer 800 is a rectangular or trapezoidal structure. When the cross-section of the second adhesive layer 800 is a trapezoidal structure, the second adhesive layer 800 includes a second upper portion 801, a second lower portion 802, a third side portion 803, and a fourth side portion 804. The second upper portion 801, the second lower portion 802, the third side portion 803, and the fourth side portion 804 form a trapezoidal structure 805. In this way, the second adhesive layer 800 has a certain thickness or thickness range P.

[0077] Optionally, the groove portion is a rectangular structure, and the multi-fiber connection device includes a first length-to-distance ratio LD and a second thickness-to-distance ratio PD, LD=L / D, PD=P / D, wherein L is the length of the groove portion along the first direction, P is the thickness or thickness range of the second adhesive layer along the second direction, and D is the distance or distance range from the end face of the end of the optical fiber unit along the second direction away from the side wall of the supporting unit, and the first direction, the second direction, and the third direction intersect with each other.

[0078] Similarly, exemplarily, the groove portion is a rectangular parallelepiped structure, and the groove portion includes a length direction, a width direction, and a height direction. The length direction can be the X direction, the width direction can be the Y direction, and the height direction can be the Z direction. The X direction, the Y direction, and the Z direction intersect with each other, for example, the X direction, the Y direction, and the Z direction can be perpendicular to each other. The first direction is the length direction X of the groove portion, the second direction is the width direction Y of the groove portion, and the third direction is the height direction Z of the groove portion; at the same time, the first support portion 101 can be a rectangular parallelepiped, and the first support portion 101 also includes a length direction, a width direction, and a height direction. The length direction of the first support portion 101 can be the above-mentioned Y direction, the width direction of the first support portion 101 can be the above-mentioned X direction, and the height direction of the first support portion 101 can be the above-mentioned X direction. Similarly, the X direction, the Y direction, and the Z direction intersect with each other, for example, the X direction, the Y direction, and the Z direction can be perpendicular to each other. L is the length of the groove portion along the first direction, and P is the thickness or thickness range of the second adhesive layer along the second direction.

[0079] Optionally, the multi-fiber connection device comprises a second coefficient LP, the second coefficient LP=LD+TD-L / H1, satisfying: 1.0≤LT≤3.0, wherein H1 is the height of the groove portion along the third direction.

[0080] In the present application, by setting the second coefficient LP, the setting of the first length ratio LD can make the groove portion have a certain length limit, and at the same time be associated with L / H1, which can reduce the processing cost of the groove portion and facilitate manual tearing and removal of the second adhesive layer 800; the setting of the second thickness ratio PD can make the thickness or thickness range of the second adhesive layer 800 have a thickness limit, which can reduce the production cost of the second adhesive layer 800 and facilitate the second adhesive layer 800 to be manually torn and removed.

[0081] Based on the two types of groove portions in the upper part, in other embodiments, the groove portion 10 includes a groove portion 20 and a groove portion 30, and the groove portion 1 and the groove portion 2 are connected. The groove portion 1 penetrates the side wall of the support unit and the side wall of the pressing unit along a first direction, and the groove portion 2 correspondingly penetrates the side wall of the support unit and the side wall of the pressing unit along a third direction, and the end of the optical fiber unit 200 is located in the groove portion.

[0082] Optionally, the groove portion 10 includes a groove sub-portion 1 20 and a groove sub-portion 2 30, the groove sub-portion 1 and the groove sub-portion 2 are connected, the groove sub-portion 1 penetrates the side wall of the support unit and the pressing unit along the first direction, and the groove sub-portion 2 correspondingly penetrates the side wall of the support unit and the pressing unit along the third direction; the support unit includes a support portion, an installation portion, and a positioning portion, the installation portion is connected to the support portion, the positioning portion is connected to the support portion, the positioning portion includes a positioning portion 1 and a positioning portion 2, the positioning portion 1 and the positioning portion 2 are located on both sides of the optical fiber unit 200 and position part of the optical fiber unit 200, the installation portion includes an installation groove, the installation groove installs the first bare fiber portion 202 and the second bare fiber portion 204, and the membrane layer is arranged on the end faces of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203; before the membrane layer is arranged on the end faces of the multiple first bare fiber portions and the multiple second bare fiber portions, the groove portion is arranged with an adhesive layer of a certain thickness or a thickness range, and after the membrane layer is arranged on the end faces of the multiple first bare fiber portions and the multiple second bare fiber portions, the adhesive layer is removed.

[0083] Similarly, the groove portion 10 can be coated with an adhesive or a film can be adhered to form an adhesive layer. The ends of the multiple first bare fiber portions 202 are not coated with adhesive. The thickness or thickness range S of the adhesive layer is less than the distance D or the distance range D. After applying the adhesive, the thickness or thickness range S of the adhesive layer is less than the distance D or the distance range D. After applying the adhesive, the ends of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 can be plated. After the coating is completed, the adhesive layer can be manually removed and the film layer can be set on the ends of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203, without affecting the effect of the coating treatment of the ends of the multiple first bare fiber portions 202 and the multiple second bare fiber portions 203 on the support unit 100 and the pressing unit 300.

[0084] Optionally, the groove portion 10 is a cross cube structure, the groove sub-portion 1 20 is a rectangular parallelepiped structure, the groove sub-portion 2 30 is a rectangular parallelepiped structure, and the multi-fiber connection device includes a height-to-distance ratio SHD, a length-to-distance ratio SLD, and a thickness-to-distance ratio SSD, SHD=SH / D, SLD=SL / D, SSD=SS / D, wherein SH is the height of the groove sub-portion 1 along the third direction, SL is the length of the groove sub-portion 2 along the first direction, SS is the thickness or thickness range of the adhesive layer along the second direction, and D is the distance or distance range from the end face of the end of the optical fiber unit along the second direction away from the side wall of the supporting unit, and the first direction, the second direction, and the third direction intersect with each other.

[0085] Also exemplarily, the groove portion 10 is a cross cube structure, and the groove sub-portion 1 20 and the groove sub-portion 2 30 both include a length direction, a width direction, and a height direction. The length direction can be an X direction, the width direction can be a Y direction, and the height direction can be a Z direction. The X direction, the Y direction, and the Z direction intersect with each other. For example, the X direction, the Y direction, and the Z direction can be perpendicular to each other and are located in the same XYZ direction system. The first direction is the length direction X of the groove sub-portion one and the groove sub-portion two, the second direction is the width direction Y of the groove sub-portion one and the groove sub-portion two, and the third direction is the height direction Z of the groove sub-portion one and the groove sub-portion two; at the same time, the first support portion 101 can be a rectangular parallelepiped correspondingly, and the first support portion 101 also includes a length direction, a width direction and a height direction. The length direction of the first support portion 101 can be the above-mentioned Y direction, the width direction of the first support portion 101 can be the above-mentioned X direction, and the height direction of the first support portion 101 can be the above-mentioned X direction. Similarly, the X direction, the Y direction, and the Z direction intersect with each other, for example, the X direction, the Y direction, and the Z direction can be perpendicular to each other, SH is the height of the groove sub-portion one along the third direction, SL is the length of the groove sub-portion two along the first direction, and SS is the thickness or thickness range of the adhesive layer along the second direction.

[0086] Optionally, the multi-fiber connection device includes a coefficient HLS, coefficient HLS=SHD+SLD+2SS / D-SH / L2-SL / H2, satisfying: 1.0≤HLS≤5.0, where L2 is the length of groove sub-portion one along the first direction, and H2 is the height of groove sub-portion two along the third direction.

[0087] In the present application, when the first adhesive layer 400 or the second adhesive layer 800 is manually torn off and removed, the first adhesive layer 400 can be removed along the first direction or the second adhesive layer 800 can be removed along the third direction, and there may be positions where the first adhesive layer 400 and the second adhesive layer 800 are disconnected and remain at the ends of multiple first bare fiber parts 202 and multiple ends of second bare fiber parts 203. Therefore, the shape of the adhesive layer can match the shape of the groove part, and the adhesive layer can also be a cross-cube structure. When projected along the second direction, the cross-sectional shape of the adhesive layer can be a cross-shaped structure.

[0088] In the present application, by setting the coefficient HLS, the setting of the height ratio SH can make the groove sub-section one have a certain height limit, and at the same time be associated with SH / L2. At the same time, the setting of the length ratio LD, and at the same time being associated with SL / H2, can make the groove sub-section two have a certain length limit, which can facilitate manual tearing and removal of the adhesive layer; the setting of the thickness ratio SS can make the thickness or thickness range of the adhesive layer have a thickness limit, which can reduce the production cost of the adhesive layer, and can also facilitate the adhesive layer to be manually torn off and removed, so as to complete the film layer setting on the end faces of multiple first bare fiber sections 202 and multiple second bare fiber sections 203.

[0089] Therefore, in the application of the present invention, first, the pressing unit presses the multiple first bare fiber part 202 ends and the multiple second bare fiber part 203 ends of the optical fiber unit 200 onto the supporting unit, and the fixing unit 500 can fix the multiple first optical fibers and the multiple second optical fibers of the optical fiber unit 200 on the supporting unit, so that the installation of the optical fiber unit 200 can be completed to form a multi-fiber connection device for subsequent transmission and communication of optical fiber signals; at the same time, the groove portion can be coated with an adhesive or a film can be pasted to form a first adhesive layer or a second adhesive layer or an adhesive layer, and the multiple first bare fiber part 202 ends and the multiple second bare fiber part 203 ends do not form the first adhesive layer or the second adhesive layer or an adhesive layer, and the multiple first bare fiber part 202 ends and the multiple second bare fiber part 203 ends can be coated, and after the coating is completed, the first adhesive layer or the second adhesive layer or the adhesive layer can be manually removed, thereby completing the film layer setting The coating treatment of the ends of the multiple first bare fiber parts 202 and the multiple second bare fiber parts 203 will not affect the support unit 600 and the pressing unit 700; in addition, there is a certain distance between the end face of the adhesive such as glue and the end face of the bare fiber part of the optical fiber unit 200, and the end face of the adhesive such as glue and the end face of the bare fiber part of the optical fiber unit 200 will not affect each other. Even if the expansion coefficients of the glue and the optical fiber are different, there is a certain distance between the coating layer of the glue end face and the end face of the bare fiber part of the optical fiber unit 200 after coating, and they will not affect each other. The adhesive such as glue will not cause the risk of cracking or falling off of the end face coating layer of the bare fiber part of the optical fiber unit 200, and will not pollute the internal space formed by the multi-fiber connection device and other optical communication components, thereby ensuring the transmission performance of the optical fiber signal and improving the communication quality of the entire optical fiber network.

[0090] In a second aspect, the present invention provides a method for preparing a multi-fiber connection device, which may or may not use any of the multi-fiber connection devices described above, comprising the following steps:

[0091] S100: Install the optical fiber unit 200 on the supporting unit, with the end of the optical fiber unit 200 located in the groove;

[0092] Specifically, step S100 includes:

[0093] Step S101: installing the optical fiber unit 200 on the supporting unit, with the end of the optical fiber unit 200 being located in the groove;

[0094] Specifically, the optical fiber unit 200 includes multiple first bare fiber part 202 ends and multiple second bare fiber part 203 ends, the first bare fiber part 202 and the second bare fiber part 204 are arranged in sequence in the first mounting groove or the second mounting groove or on the mounting groove of the supporting unit, the second cladding part 203 is at least located at the first supporting part or the second supporting part or on the supporting part, and the multiple first bare fiber part 202 ends and the multiple second bare fiber part 203 ends are located in the groove part.

[0095] Step S102: forming a distance D or a distance range D between the end of the optical fiber unit 200 and the side wall of the supporting unit close to the end of the optical fiber unit 200.

[0096] Specifically, multiple first bare fiber portion 202 ends and multiple second bare fiber portion 203 ends are located in the groove portion, and multiple first bare fiber portion 202 ends and multiple second bare fiber portion 203 ends form a distance D or a distance range D with the side wall of the supporting unit close to the multiple first bare fiber portion 202 ends and multiple second bare fiber portion 203 ends.

[0097] S200: The pressing unit presses part of the optical fiber unit 200 onto the supporting unit, and the fixing unit 500 fixes the optical fiber unit 200 onto the supporting unit;

[0098] Specifically, step S200 includes:

[0099] Step S201: The pressing unit presses part of the optical fiber unit 200 onto the supporting unit;

[0100] Specifically, the pressing unit presses multiple first bare fiber parts 202 and multiple second bare fiber parts 204 onto the first mounting groove or the second mounting groove or the mounting groove on the support unit, so that the pressing unit can press part of the optical fiber unit 200 onto the support unit.

[0101] It should be noted that before the pressing unit presses part of the optical fiber unit 200 onto the supporting unit, glue or other adhesives can be set between the pressing unit and the supporting unit. For example, glue or other adhesives can be set on the first mounting groove or the second mounting groove or the mounting groove on the supporting unit, and multiple first bare fiber parts 202 and multiple second bare fiber parts 204 can be bonded to the first mounting groove or the second mounting groove or the mounting groove on the supporting unit. Then, the pressing unit presses part of the optical fiber unit 200 onto the supporting unit. After the glue or other adhesives are cured, the pressing unit can press and bond the multiple first bare fiber parts 202 and the multiple second bare fiber parts 204 of the optical fiber unit 200 onto the supporting unit.

[0102] Step S202: The fixing unit 500 fixes the optical fiber unit 200 on the supporting unit.

[0103] Specifically, after the pressing unit presses part of the optical fiber unit 200 onto the supporting unit, that is, after the pressing unit presses the multiple first bare fiber parts 202 and the multiple second bare fiber parts 204 onto the supporting unit, the fixing unit 500 can fix the optical fiber unit 200 on the supporting unit. The fixing unit can fix the first cladding part, the first bare fiber part, the second cladding part, and the second bare fiber part on the supporting unit. Exemplarily, the optical fiber unit 200 can be fixed to the supporting unit by using adhesives such as glue.

[0104] S300: The end face of the end of the optical fiber unit 200 is at least ground, and the groove portion is formed with a first adhesive layer or a second adhesive layer or an adhesive layer. The end of the optical fiber unit without the first adhesive layer or the second adhesive layer or the adhesive layer and the adhesive layer are plated to form a film layer.

[0105] Specifically, step S300 includes:

[0106] Step S301: performing at least a grinding process on the end surface of the end portion of the optical fiber unit 200;

[0107] Specifically, the end faces of the ends of the multiple first bare fiber parts 202 and the end faces of the multiple second bare fiber parts 204 of the optical fiber unit 200 are at least ground, polished, ultrasonically cleaned, etc. to ensure the flatness of the end faces of the ends of the multiple first bare fiber parts 202 and the end faces of the multiple second bare fiber parts 204 and the quality of the first optical fiber ends and the second optical fiber ends;

[0108] Step S302: The groove portion is formed with a first adhesive layer or a second adhesive layer or an adhesive layer, and the end of the optical fiber unit not provided with the first adhesive layer or the second adhesive layer or an adhesive layer and the adhesive layer are plated to form a film layer.

[0109] Specifically, the plurality of first bare fiber portions 202 and the plurality of second bare fiber portions 204 without adhesive layers and the adhesive layer may be plated to form a film layer.

[0110] Step S3021: the groove portion may be coated with an adhesive or a film may be attached to form a first adhesive layer or a second adhesive layer or an adhesive layer, the ends of the plurality of first bare fiber portions 202 and the ends of the plurality of second bare fiber portions 204 are not coated with an adhesive or a film may be attached, the ends of the plurality of first bare fiber portions 202 and the ends of the plurality of second bare fiber portions 204 will not be provided with a first adhesive layer or a second adhesive layer or an adhesive layer, and the maximum thickness of the first adhesive layer or the second adhesive layer or an adhesive layer is less than the distance D or the distance range D;

[0111] Step S3022: coating the plurality of first bare fiber portions 202 and the plurality of second bare fiber portions 204 without the first adhesive layer or the second adhesive layer or the adhesive layer and the first adhesive layer or the second adhesive layer or the adhesive layer to form a film layer.

[0112] S400: After removing the adhesive layer, a film layer is formed on the end face of the end of the optical fiber unit, and the preparation for the multi-optical optical fiber connection is completed.

[0113] Specifically, the adhesive layer is removed, for example, by manually tearing it off, and a film layer is formed on the end face of the optical fiber unit end, that is, the film layer can be correspondingly set on the ends of multiple first bare fiber parts 202 and multiple second bare fiber parts 203, thereby completing the preparation of the multi-fiber connection device.

[0114] When the groove portion can be provided with a first adhesive layer, the groove portion is a rectangular parallelepiped structure, and the support unit includes a first height ratio HD, a first thickness ratio TD, HD=H / D, TD=T / D, wherein H is the height of the groove portion along the third direction, T is the thickness or thickness range of the first adhesive layer along the second direction, and D is the distance or distance range of the end face of the end of the optical fiber unit away from the side wall of the support unit along the second direction, and the first direction, the second direction, and the third direction intersect each other; the multi-fiber connection device includes a first coefficient HT, the first coefficient HT=HD+TD-H / L1, and satisfies: 1.0≤HT≤3.0, wherein L1 is the length of the groove portion along the first direction. Its technical effect is the same as the embodiment of the multi-fiber connection device described above, and the present invention application will not repeat it.

[0115] Or, when the groove portion can be provided with a second adhesive layer, the groove portion is a rectangular structure, and the support unit includes a first length-to-distance ratio LD and a second thickness-to-distance ratio PD, LD=L / D, PD=P / D, wherein L is the length of the groove portion along the first direction, P is the thickness or thickness range of the second adhesive layer along the second direction, and D is the distance or distance range of the end face of the end of the optical fiber unit away from the side wall of the support unit along the second direction, and the first direction, the second direction, and the third direction intersect with each other; the multi-fiber connection device includes a second coefficient LP, the second coefficient LP=LD+TD-L / H1, satisfying: 1.0≤LT≤3.0, wherein H1 is the height of the groove portion along the third direction; its technical effect is the same as that of the above-mentioned embodiment of the multi-fiber connection device, and the present application will not elaborate on this.

[0116] Or, when the groove portion can be provided with an adhesive layer, the groove portion is a cross cube structure, the groove sub-portion 1 is a rectangular parallelepiped structure, the groove sub-portion 2 is a rectangular parallelepiped structure, and the support unit 100 includes a height ratio SHD, a length ratio SLD, and a thickness ratio SSD, SHD=SH / D, SLD=SL / D, SSD=SS / D, wherein SH is the height of the groove sub-portion 1 along the third direction, SL is the length of the groove sub-portion 2 along the first direction, SS is the thickness or thickness range of the adhesive layer along the second direction, and D is the length of the optical fiber along the second direction. The distance or distance range of the end face of the end of the unit away from the side wall of the supporting unit, the first direction, the second direction, and the third direction intersect each other; the multi-fiber connection device includes a coefficient HLS, the coefficient HLS=SHD+SLD+2SS / D-SH / L2-SL / H2, satisfying: 1.0≤HLS≤5.0, wherein L2 is the length of the groove sub-portion one along the first direction, and H2 is the height of the groove sub-portion two along the third direction. The technical effect is the same as the above-mentioned embodiment of the multi-fiber connection device, and the present application will not repeat it.

[0117] Therefore, in the preparation method of the multi-fiber connection device applied in the present invention, the groove portion can be coated with an adhesive or a glue film can be pasted to form an adhesive layer, and the multiple first bare fiber portion ends are not coated with an adhesive, and the multiple first bare fiber portion ends and the multiple second bare fiber portion ends can be subjected to a coating treatment. After the coating is completed, the adhesive layer can be manually removed to complete the film layer setting on the multiple first bare fiber portion ends and the multiple second bare fiber portion ends, without affecting the effect of the coating treatment of the multiple first bare fiber portion ends and the multiple second bare fiber portion ends on the supporting unit and the pressing unit; at the same time, the end face of the adhesive such as glue and the optical fiber There is a certain distance between the end faces of the bare fiber part of the unit, and the end faces of adhesives such as glue and the bare fiber part of the optical fiber unit will not affect each other. Even if the expansion coefficients of the glue and the optical fiber are different, there is a certain distance between the coating layer of the glue end face and the bare fiber part of the optical fiber unit, and they will not affect each other. Adhesives such as glue will not cause the risk of cracking or falling off of the end face coating layer of the bare fiber part of the optical fiber unit, and will not pollute the internal space formed by the multi-fiber connection device and other optical communication components, which also ensures the transmission performance of optical fiber signals and improves the communication quality of the entire optical fiber network.

[0118] As mentioned above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A multi-fiber connection device, characterized in that: include: A support unit, an optical fiber unit, a pressing unit, and a fixing unit, wherein the optical fiber unit is located on the support unit, the pressing unit is located above the support unit and presses part of the optical fiber unit onto the support unit; the fixing unit fixes the optical fiber unit on the support unit; the end face of the end of the optical fiber unit is away from the side wall of the support unit, and the film layer is arranged on the end face of the end of the optical fiber unit; The optical fiber unit comprises a first optical fiber part and a second optical fiber part, the first optical fiber part comprises a plurality of first optical fibers, the first optical fiber comprises a first cladding part and a first bare fiber part, the second optical fiber part comprises a plurality of second optical fibers, the second optical fiber comprises a second cladding part and a second bare fiber part; the first cladding part is located above the first cladding part, the first bare fiber part and the second bare fiber part are sequentially arranged on the supporting unit, and the pressing unit presses the first bare fiber part and the second bare fiber part on the supporting unit; The groove portion includes a groove sub-portion 1 and a groove sub-portion 2, the groove sub-portion 1 and the groove sub-portion 2 are connected, the groove sub-portion 1 penetrates the side wall of the support unit and the side wall of the pressing unit along a first direction, and the groove sub-portion 2 correspondingly penetrates the side wall of the support unit and the side wall of the pressing unit along a third direction; the support unit includes a support portion, an installation portion, and a positioning portion, the installation portion is connected to the support portion, the positioning portion is connected to the support portion, the positioning portion includes a positioning portion 1 and a positioning portion 2, the positioning portion 1 and the positioning portion 2 are located on both sides of the optical fiber unit and position part of the optical fiber unit, the installation portion includes an installation groove, the installation groove installs the first bare fiber portion and the second bare fiber portion, and the membrane layer is arranged on the end surfaces of multiple first bare fiber portions and multiple second bare fiber portions; Before the film layer is arranged on the end faces of the plurality of first bare fiber parts and the plurality of second bare fiber parts, an adhesive layer of a certain thickness is arranged on the groove part; projected along the second direction, the cross section of the adhesive layer is a cross-shaped structure, the groove part is a cross-cube structure, the groove sub-part one is a rectangular parallelepiped structure, the groove sub-part two is a rectangular parallelepiped structure, and the multi-fiber connection device includes a height-to-distance ratio SHD, a length-to-distance ratio SLD, and a thickness-to-distance ratio SSD, SHD=SH / D, SLD=SL / D, SSD=SS / D, wherein SH is the height of the groove sub-part one along the third direction, SL is the length of the groove sub-part two along the first direction, SS is the thickness of the adhesive layer along the second direction, and D is the distance from the end face of the end of the optical fiber unit to the side wall of the support unit along the second direction, and the first direction, the second direction, and the third direction intersect with each other; The multi-fiber connection device includes a coefficient HLS, the coefficient HLS=SHD+SLD+2SS / D-SH / L2-SL / H2, satisfying: 1.0≤HLS≤5.0, where L2 is the length of the groove sub-portion one along the first direction, and H2 is the height of the groove sub-portion two along the third direction.

2. A method for preparing a multi-fiber connection device, using the multi-fiber connection device according to claim 1, comprising the following steps: S100: installing the optical fiber unit on the supporting unit, with the end of the optical fiber unit being located in the groove; S200: The pressing unit presses part of the optical fiber unit onto the supporting unit, and the fixing unit fixes the optical fiber unit onto the supporting unit; S300: performing at least grinding processing on the end surface of the end of the optical fiber unit, forming an adhesive layer on the groove portion, and coating the end of the optical fiber unit without the adhesive layer and the adhesive layer to form a film layer; S400: After removing the adhesive layer, a film layer is formed on the end surface of the end of the optical fiber unit, and the preparation for the multi-optical optical fiber connection is completed; The step S100 includes: Step S101: installing the optical fiber unit on the supporting unit, with the end of the optical fiber unit located in the groove; Step S102: forming a first distance between the end of the optical fiber unit and the side wall of the support unit close to the end of the optical fiber unit; The step S200 includes: Step S201: The pressing unit presses part of the optical fiber unit onto the supporting unit; Step S202: The fixing unit fixes the optical fiber unit on the supporting unit; Step S300 includes: Step S301: performing at least a grinding process on the end surface of the end of the optical fiber unit; Step S302: an adhesive layer is formed in the groove portion, and a film is formed on the end of the optical fiber unit without the adhesive layer and the adhesive layer; Step S302 includes: Step S3021: the groove portion is coated with an adhesive or a film is adhered to form an adhesive layer, the ends of the plurality of first bare fiber portions and the ends of the plurality of second bare fiber portions are not coated with an adhesive or a film is adhered, the ends of the plurality of first bare fiber portions and the ends of the plurality of second bare fiber portions are not provided with an adhesive layer, and the maximum thickness of the adhesive layer is less than the first distance; Step S3022: coating the plurality of first bare fiber portions without adhesive layers, the plurality of second bare fiber portions, and the adhesive layer to form a film layer; When an adhesive layer is formed on the groove portion, the groove portion is a cross-cube structure, the groove sub-portion one is a rectangular parallelepiped structure, the groove sub-portion two is a rectangular parallelepiped structure, and the multi-fiber connection device includes a height-to-distance ratio SHD, a length-to-distance ratio SLD, and a thickness-to-distance ratio SSD, SHD=SH / D, SLD=SL / D, SSD=SS / D, wherein SH is the height of the groove sub-portion one along the third direction, SL is the length of the groove sub-portion two along the first direction, SS is the thickness of the adhesive layer along the second direction, and D is the distance from the end face of the end of the optical fiber unit along the second direction to the side wall of the supporting unit, and the first direction, the second direction, and the third direction intersect with each other.

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