WO2016070486A1

WO2016070486A1 - An optical fiber connector with improved fastening between the backbone and the cable fixture

Info

Publication number: WO2016070486A1
Application number: PCT/CN2014/095896
Authority: WO
Inventors: Kim Man Wong; Man Kit Wong
Original assignee: Senko Advanced Components (Hk) Ltd
Priority date: 2014-11-06
Filing date: 2014-12-31
Publication date: 2016-05-12
Also published as: CN105629391A; CN105629391B

Abstract

A optical fiber connector with improved fastening between the backbone (10) and the cable fixture (11) which is based on an optical fiber mechanical splice (100) is provided. The optical fiber mechanical splice (100) comprises a main body (1), rotating block (2) and compression block (3). Either end of the main body (1) has an opening (1-12, 1-13) for the passage of the optical fiber to be joined. The main body (1) has the first main plane (1-7) axially parallel to the optical fiber, and the first main plane (1-7) has a V-shaped groove (1-5) extending axially along the optical fiber. The rotating block (2) has the second main plane (2-6). The main body (1) has an accommodating chamber to accommodate the rotating block (2), and the second main plane (2-6) of the rotating block (2) faces the first main plane (1-7) of the main body (1). The compression block (3) is inserted between the rotating block (2) and the main body (1), which presses the rotating block (2) and drives the rotating block (2) to rotate relative to the main body (1). When the rotating block (2) rotates relative to the main body (1), the first main plane (1-7) and the second main plane (2-6) can switch between the open position and the closed position. The field-fabricated optical fiber connectors are divided into embedded connectors and through-type connectors. The optical fiber connector has the advantages of simple structure, high productivity, low cost, reliable performance and high installation success rate.

Description

AN OPTICAL FIBER CONNECTOR WITH IMPROVED FASTENING BETWEEN THE BACKBONE AND THE CABLE FIXTURE

Technical Field：

The present invention relates to a connection device for joining of optical fiber, particularly to an optical fiber mechanical splice. The present invention also relates to an embedded field-fabricated optical fiber connector and a through-type field-fabricated optical fiber connector based on the optical fiber mechanical splice.

Background：

At present, the joining of optical fibers usually adopts three methods for fixation of optical fiber：

One method is to tightly press a folded metal sheet to fix the ends of two pieces of optical fiber to achieve joining. Wherein, a V-shaped groove is provided in the folded metal sheet for joining of optical fiber； the pressing device is used to press the wedge-shaped fixing block to reduce the gap of the folded metal sheet, so as to press the optical fibers and achieve joining of the two pieces of optical fiber. The production process of the metal sheet of this structure is complex, and it is difficult to control the quality； moreover, when the metal sheet is folded to form a V-shaped groove channel, the guide surface is prone to misaligning with the V-shaped groove, so it is difficult to lead the optical fiber into the V-shaped groove, and the end surface of the optical fiber will be in contact with the guide surface, causing damage to the end surface of the optical fiber and a serious decline in joining performance.

Another method is to use a pair of plastic blocks pressed by a U-shaped metal reed to fix the ends of two pieces of optical fiber to achieve joining. Of the two mating plastic blocks, one plastic block is provided with a V-shaped groove for joining of optical fiber, which forms a V-shaped groove channel with the surface of the other plastic block； an auxiliary tool is wedged into the mating plastic blocks to open the V-shaped groove channel, the ends of the two pieces of optical fiber to be joined are passed into the channel, then the auxiliary tool is pulled out, and the U-shaped reed will shrink and close the V-shaped groove channel, thereby pressing the ends of the two pieces of optical fiber to achieve joining. The assembling of the U-shaped reed of this structure and the plastic blocks is unstable, resulting in product instability, difficult passage for optical fiber, decline in joining performance and other joining problems.

A further method is to use a movable cover to hold down the V-grooved metal block and the floating block in the box-type housing to fix the ends of two pieces of optical fiber to achieve joining. Wherein, the V-grooved metal block is embedded in the box-type housing, and the floating block is connected with the box-type housing through a floating rib. The compression device holds down the movable cover to make the floating block attach to the V-grooved metal block, thereby pressing the ends of the optical fiber. It is difficult to guarantee the manufacturing accuracy of the box-type housing of this structure and its floating block, resulting in difficulty to ensure the relative assembling accuracy of the V-shaped groove channel and the floating block, decline in joining performance, product quality instability and other joining problems. In addition, the floating rib deforms easily during compression of movable cover owing to its thin wall, causing joining instability, difficulty for re-joining and other joining problems.

Thus, those skilled in the art are committed to the development of a simple, low-cost and reliable optical fiber splicing solution.

Summary of the Invention：

In view of the above drawbacks of the prior art, the first object of the present invention is to provide an optical fiber mechanical splice featured by simple structure, low cost and reliability.

The second object of the present invention is to provide an embedded field-fabricated optical fiber connector based on the optical fiber mechanical splice.

The third object of the present invention is to provide a through-type field-fabricated optical fiber connector based on the optical fiber mechanical splice.

The fourth object of the present invention is to provide an optical fiber connector, which improves the connection between backbone and optical cable fixture and is based on the optical fiber mechanical splice.

To achieve the first object, the present invention adopts the following technical solution： An optical fiber mechanical splice, comprising a main body, a rotating block and a compression block；

Either end of the main body has an opening for the passage of the optical fiber to be joined；

The main body has a first main plane axially parallel to the optical fiber, and the first main plane has a V-shaped groove extending axially along the optical fiber；

The rotating block has a second main plane；

The main body has an accommodating chamber to accommodate the rotating block, and the second main plane of the rotating block faces the first main plane of the main body；

The compression block is inserted between the rotating block and the main body, which presses the rotating block and drives the rotating block to rotate relative to the main body； when the rotating block rotates relative to the main body, the first main plane and the second main plane can switch between the open position and the closed position, wherein the open position refers to that the first main plane and the second main plane in the open state, and the closed position refers to that the second main plane is as close as possible to the first main plane.

Preferably, in the case of the open position, the first main plane and the second main plane form a first angle； in the case of the closed position, the first main plane and the second main plane form a second angle, and the second angle is less than the first angle.

Preferably, in the case of the open position, the angle between the first main plane of the main body and the direction of pressure applied on the rotating block when the compression block is inserted is within the range of 15°-60°.

Preferably, in the case of the closed position, the optical fiber located in the V-shaped groove is pressed by the second main plane, and the angle between the direction of pressure applied by the second main plane on the optical fiber in the V-shaped groove and the direction of pressure applied on the rotating block when the compression block is inserted is within the range of 40°-75°.

Preferably, the section of the openings on both ends of the main body is U-shaped.

Preferably, the opening at either end of the main body is a hole, the two holes are coaxial, and the minimum diameter of the hole is slightly larger than the outer diameter of the optical fiber； when the optical fiber is located in the V-shaped groove, the axis of the optical fiber coincides with the axis of the two holes.

Preferably, the hole becoming gradually larger from inside to outside is bell-shaped or cone-shaped.

Preferably, the cross-section of the hole is circular, oval or polygonal.

Preferably, the two axial ends of the V-shaped groove also have an inclined guide surface.

Preferably, the second main plane of the rotating block is a complete plane, which, together with the V-shaped groove, constitutes the V-shaped groove channel to accommodate the optical fiber.

Preferably, the two ends of the second main plane also have an inclined guide wall.

Preferably, the second main plane of the rotating block also has a recess which is located above the V-shaped groove and extends axially along the optical fiber, and the recess and the V-shaped groove constitute the accommodating channel to accommodate the optical fiber.

Preferably, the rotating block has a first auxiliary plane and a second auxiliary plane, and a first angle is formed between the first auxiliary plane and the second auxiliary plane； the rotating block also has a stress plane, and the stress plane has the first stress part and the second stress part；

The main body has a third auxiliary plane and a fourth auxiliary plane, and a second angle is formed between the third auxiliary plane and the fourth auxiliary plane；

The first angle is greater than the second angle；

The compression block has a first force application part and a second force application part；

In the case of the open position, the first force application part presses the first stress part, and the second force application part does not contact with the second stress part, so that the first auxiliary plane clings to the third auxiliary plane； in addition, the second auxiliary plane is separated from the fourth auxiliary plane, and the second main plane and the first main plane are in the open state；

In the case of the closed position, the second force application part presses the second stress part, the first force application part is separated from the first stress part, and the first auxiliary plane is separated from the third auxiliary plane； in addition, the second auxiliary plane clings to the fourth auxiliary plane, and the second main plane and the first main plane are in the closed state to press the optical fiber between them.

Preferably, in the case of the open position, the first force application part presses the first stress part, and the first auxiliary plane clings to the third auxiliary plane.

Preferably, in the case of the open position, the fourth auxiliary plane comes into contact with the second auxiliary plane at the root.

Preferably, the compression block has two first force application parts, the two first force application parts are axially located at the two ends of the compression block respectively, the rotating block has two first stress parts, the two stress parts are axially located at the two ends of the rotating block and correspond to the two first force application parts respectively.

Preferably, there is a first clasp and a second clasp between the main body and the compression block；

There is a first convex platform between the main body and the compression block, there is a first concave surface between the main body and the compression block, and the first convex platform and the first concave surface constitute the first clasp； in the case of the open position, the first convex platform and the first concave surface clasp；

There is a second convex platform between the main body and the compression block, there is the second concave surface between the main body and the compression block, and the second convex platform and the second concave surface constitute the second clasp； in the case of the closed position, the second convex platform and the second concave surface clasp.

Preferably, the first convex platform and the second convex platform are located on the main body； the first concave surface and the second concave surface are located on the compression block.

Preferably, the first concave surface and the second concave surface located on the compression block are resilient.

Preferably, the main body has two second convex platforms, the two second convex platforms are axially located at the two ends of the accommodating chamber inside the main body respectively, the compression block has two said second concave surfaces, and the two second concave surfaces are axially located at the two ends of the compression block respectively.

To achieve the second object, the present invention adopts the following technical solution：

An embedded field-fabricated optical fiber connector, comprising：

A housing suitable for connection with the interface of the optical fiber connector adapter；

The optical fiber mechanical splice, which is located in the housing；

The core insert connected with the optical fiber mechanical splice；

A piece of embedded optical fiber installed in the core insert, wherein the end surface of the first end of the embedded optical fiber is nearly parallel to one end surface of the core insert, the second end of the embedded optical fiber is preset in the first half of the V-shaped groove channel of the optical fiber mechanical splice, so as to connect with the core of the second optical fiber in the V-shaped groove；

The backbone which keeps the optical fiber mechanical splice and the core insert inside the housing, wherein the backbone comprises one or more clamping units which fix the cable sheath of the second optical fiber； and

Cable fixture, wherein the cable fixture and the clamping unit of the backbone work together to fix the cable.

To achieve the third object, the present invention adopts the following technical solution：

A through-type field-fabricated optical fiber connector, characterized in that it comprises：

The optical fiber mechanical splice, which is located in the housing；

The core insert connected with the optical fiber mechanical splice；

To achieve the fourth object, the present invention adopts the following technical solution：

The optical fiber connector, wherein

The cable fixture comprises one or more trenches communicating with the opening of the cable fixture, which accommodates one or more projections on the backbone, and the projections are locked into the trenches to fasten the cable fixture onto the backbone.

Preferably, the clamping unit is a baffle, which obstructs the leading-in optical fiber cable from passing through.

Preferably, the backbone comprises one or more projections, which prop against the cable fixture, thereby limiting the length of the backbone covered by the cable fixture.

In comparison with the prior art, the optical fiber connector according to the present invention is featured by simple structure, high productivity, low cost, reliable performance, high installation success rate, etc.

The concept, specific structure and the resulting technical effect of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, features and advantages of the present invention.

Description of the Drawings：

Figure 1 is an exploded view of a preferred embodiment of the optical fiber mechanical splice of the present invention；

Figure 2 is a perspective view of the initial state of the embodiment of Figure 1 after being assembled；

Figure 3 is a view of the optical fiber mechanical splice of Figure 2 with part of its end cut away；

Figure 4 is a view of the optical fiber mechanical splice of Figure 2 after being split along its middle cross-section；

Figures 5 and 6 are perspective views of the main body of the embodiment of Figure 1 in different directions；

Figures 7 and 8 are sectional views of the main body of the embodiment of Figure 1 in different directions；

Figures 9, 10 and 11 are perspective views of the rotating block of the embodiment of Figure 1 in different directions；

Figures 12 and 13 are perspective views of the compression block of the embodiment of Figure 1 in different directions；

Figure 14 is a sectional view of the embodiment of the optical fiber mechanical splice of Figure 1 after being assembled and split along its middle cross-section；

Figure 15 is a sectional view of the embodiment of the optical fiber mechanical splice of Figure 1 after it is assembled and part of its end is cut away；

Figure 16 is a perspective view of the embedded optical fiber connector of the present invention after optical fiber cable joining is completed；

Figure 17 is an exploded view of the optical fiber connector assembly shown in Figure 16；

Figure 18 is a perspective view of the embedded optical fiber connector of the present invention with the embedded optical fiber 6, core insert 7, tail handle body 8, rotating block 2, compression block 3, spring 9 and backbone 10 assembled；

Figure 19 is an axial sectional view of the assembly shown in Figure 18；

Figure 20 is a perspective view of the embedded optical fiber connector of the present invention with the embedded optical fiber 6, core insert 7, tail handle body 8, rotating block 2 and compression block 3 assembled；

Figure 21 is a perspective view of the assembly of Figure 20 with the rotating block 2 and compression block 3 unassembled；

Figure 22 is a perspective view of the embedded optical fiber connector of the present invention with the embedded optical fiber 6 and core insert 7 assembled；

Figure 23 is an axial sectional view of the assembly shown in Figure 22；

Figure 24 is a perspective view of the tail handle body 8 of the embedded optical fiber connector of the present invention；

Figure 25 is an axial sectional view of the tail handle body 8 shown in Figure 24；

Figure 26 is a perspective view of the backbone 10 of the embedded optical fiber connector of the present invention；

Figure 27 is a perspective view of the cable fixture 11 of the embedded optical fiber connector of the present invention；

Figure 28 is a perspective view of the embedded optical fiber connector of the present invention when the cable and its optical fiber have been passed for future pressing；

Figure 29 is a perspective view of the embedded optical fiber connector of the present invention when the joining has been completed and the cable has been fixed；

Figure 30 is a schematic structural view of the optical fiber cable 12, which comprises the cable sheath 12-3, coating 12-2 and core 12-1；

Figure 31 is a sectional view of the backbone 10 of the embodiment of the present invention；

Figure 32 is a sectional view of the internal structure of the through-type field-fabricated optical fiber connector of the present invention；

Figure 33 is an exploded view of the through-type field-fabricated optical fiber connector of the present invention；

Figure 34A is an exploded view of the optical fiber connector of the embodiment of the present invention；

Figure 34B is a perspective view of the optical fiber connector of the embodiment of the present invention；

Figures 35A-35F are different views of the embodiment of the present invention when the cable fixture 11 is installed onto the backbone 10；

Figures 36A-36C are flow charts of the installation of the cable fixture 11 onto the backbone 10 in the embodiment of the present invention；

Figures 37A and 37B are sectional views of different sections of the backbone 10 with the cable fixture 11 installed in the embodiment of the present invention；

Figures 38A-38F are various views of the backbone 10 in the embodiment of the present invention；

Figure 39 is a perspective view of the backbone 10 with the cable fixture 11 installed in the embodiment of the present invention；

Figure 40 is a perspective view of the backbone 10 with the cable fixture 11 installed in the embodiment of the present invention, wherein the cable fixture 11 is cut half-open；

Figures 41A-41D are flow charts of the installation of the optical fiber cable 12 onto the backbone 10 of the optical fiber connector of the present invention, wherein the optical fiber cable 12 is 2 × 3mm leading-in cable；

Figures 42A-42D are flow charts of the installation of the optical fiber cable 12 onto the backbone 10 of the optical fiber connector of the present invention, wherein the optical fiber cable 12 is 1.6 × 2mm leading-in cable；

Figures 43A-43D are flow charts of the installation of the optical fiber cable 12 onto the backbone 10 of the optical fiber connector of the present invention, wherein the optical fiber cable 12 is a circular leading-in cable with a diameter of 3mm.

Detailed Description of the Invention：

Specific embodiment 1： Optical fiber mechanical splice

As shown in Figure 1, a specific embodiment of the present invention is the optical fiber mechanical splice 100, comprising a main body 1, rotating block 2 and compression block 3. The specific structures of these components are shown in Figures 5-13. Wherein, Figures 5-8 shows the structure of the main body 1, Figures 9-11 shows the structure of the rotating block 2, and Figures 12 and 13 show the structure of the compression block 3.

Figure 2 shows the initial state of the optical fiber mechanical splice 100 after being assembled. Figure 3 is a view of the optical fiber mechanical splice 100 of Figure 2 with part of its end cut away. Figure 4 is a view of the optical fiber mechanical splice of Figure 2 after being split along its middle cross-section.

In reference to Figures 7 and 8, the holes 1-12 and 1-13 at both ends of the main body 1 are used to pass the optical fiber to be joined. To facilitate passage and alignment of the optical fiber, holes 1-12 and 1-13 can be made in the shape of bell or cone. The holes are used to lead the optical fiber into the acceptable range of the leading-in hole 4-1 (see Figure 3) formed by the inclined guide surface 1-4 (see Figure 6) of the main body 1 and the inclined guide wall 2-5 (see Figure 10) of the rotating block 2. If the holes 1-12 and 1-13 are square holes or openings of other shapes, such as U-shaped groove, the same function can also be achieved, and the shape becoming gradually larger from inside to outside is also not limited to the bell or cone. Holes 1-12 and 1-13 are coaxial or basically coaxial, the minimum diameter of the hole is slightly larger than the outer diameter of the optical fiber； when the optical fiber is located in the V-shaped groove 1-5 on the plane 1-7 (the first main plane, see Figures 4 and 7) of the main body 1, the axis of the optical fiber basically coincides with the axis of the holes 1-12 and 1-13. Of course, in other embodiments, holes 1-12 and 1-13 may be non-coaxial, as long as their openings allow passage and placement of the optical fiber into the V-shaped groove 1-5.

As shown in Figures 5-8, the main body 1 has an accommodating chamber to accommodate the rotating block 2, and insert the compression block 3 after the rotating block 2 is placed in the main body 1. When the rotating block 2 is placed in the accommodating chamber of the main body 1, the plane 2-6 (the second main plane, see Figures 4 and 10) of the rotating block 2 shall face the plane 1-7 (the first main plane ) of the main body 1； the plane 2-1 (the first auxiliary plane) of the rotating block 2 faces the plane 1-6 (the third auxiliary plane) of the main body 1； the plane 2-3 (the second auxiliary plane) of the rotating block 2 faces the plane 1-11 (the fourth auxiliary plane) of the main body 1.

The first angle is formed between the first auxiliary plane (plane 2-1) and the second auxiliary plane (plane 2-3) of the rotating block 2； the second angle is formed between the third auxiliary plane (plane 1-6) and the fourth auxiliary plane (plane 1-11) of the main body 1； the first angle is greater than the second angle； therefore, the rotating block 2 can rotate in the accommodating chamber of the main body 1, and its maximum angle of rotation relative to the main body 1 is the difference between the first angle and second angle.

The rotating block is placed in the preset accommodating chamber of the main body 1, the compression block 3 is interposed between the rotating block 2 and the main body 1, and the compression block 3 can move up and down by application of an external force to the compression block 3； when the compression block 3 is located at a high level, the plane 1-7 of the main body 1 and the plane 2-6 of the rotating block 2 are in the open state, that is, the open position. In the case of the open position, the optical fiber is in the state of readiness for joining as the initial state； a downward pressure can be applied to the compression block 3 to make the compression block 3 locate at a low level, and then rotate the rotating block 2 by a certain angle, so as to make the plane 2-6 of the rotating block 2 get as close as possible to the plane 1-7 of the main body 1, that is, the closed position. In the case of the closed position, plane 1-7 and plane 2-6 will work together to press the optical fiber located in the V-shaped groove 1-5 to join the optical fiber, and this state is considered as the completion state.

In the open position, the plane 2-6 of the rotating block 2 and the plane 1-7 of the main body 1 form the first angle； in the closed position, the optical fiber is placed in the V-shaped groove； as part of the optical fiber is outside of the V-shaped groove, the plane 2-6 of the rotating block 2 presses against the upper end of the optical fiber in the radial direction, and it should be noted that in this state, the plane 2-6 of the rotating block 2 is not in close contact with the plane 1-7 of the main body 1 state (because ifthe plane 2-6 is in close contact with the plane 1-7, the rotating block 2 will actually apply pressure on the plane 1-7 of the main body 1) , and the second angle is actually formed between them； the second angle is less than the first angle, and the difference between them is the angle rotated by the rotating block 2.

The compression block 3 applies pressure to the rotating block 2 at two stages. The compression block 3 has the first force application part (plane 3-1) and the second force application part (plane 3-3) ； correspondingly, the rotating block has a stress plane, and the stress plane has the first stress part (plane 2-8) and the second stress part (plane 2-9) . The plane 3-1 protrudes from the plane 3-3, so at the first stage of pressure application when the compression block 3 is inserted, the first force application part (plane 3-1) first applies pressure to the first stress part (plane 2-8) . When the compression block 3 is further pressed, the first force application part (plane 3-1) is detached from the first stress part (plane 2-8) , and the second force application part (plane 3-3) applies pressure to the second stress part (plane 2-9) .

At the first stage of pressure application when the optical fiber mechanical splice of the present invention is assembled for use, the splice is in its initial state shown in Figures 2, 3 and 4； at the second stage of pressure application, the splice is in its completion state shown in Figures 14 and 15.

In reference to Figures 3 and 4, in the initial state, as the first force application part (plane 3-1) applies pressure to the first stress part (plane 2-8) , the plane 1-6 is in contact with the plane 2-1, restricting the motion freedom of the rotating block in the horizontal direction； the plane 1-7 is in contact with the plane 2-4, restricting the motion freedom of the rotating block in the downward direction； the plane 1-11 is in contact with the plane 2-2, restricting the motion freedom of the rotating block in the upward direction. Here, plane 2-2 is a short plane at the root of the second auxiliary plane (plane 2-3) , which is used as the support of the fourth auxiliary plane (plane 1-11) , in order for accurate positioning. Of course, if the plane 2-2 is cancelled, the intersection edge between the plane 2-3 and the plane 2-1 can be utilized for the positioning of the plane 1-11, so that the object of the present invention can also be achieved.

In this case, the plane 1-7 (the first main plane) of the main body 1 and the plane 2-6 (the second main plane) of the rotating block 2 are in the open state at an angle, the V-shaped groove channel 4-3 formed by the V-shaped groove 1-5 and the plane 2-7 is open to allow passage of the optical fiber. The inclined guide surface 1-4 and the inclined guide wall 2-5 form the leading-in hole 4-1 of the V-shaped groove channel 4-3, which allows smooth leading of the optical fiber into the V-shaped groove channel. The inner end surfaces 1-1 and 1-10 restrict the axial position of the rotating block 2 and the compression block 3.

It should be noted that, if necessary, the surface 2-7 may be the inner surface of the recess on the plane 2-6 (the second main plane) of the rotating block 2 corresponding to the V-shaped groove 1-5； in some cases, the concave surface 2-7 may not be provided, as the plane 2-6 and the V-shaped groove 1-5 can also form the V-shaped groove channel 4-3 directly.

As shown in Figure 4, the recess 3-4 of the compression block 3 and the convex platform 1-9 of the main body constitute the clasp 4-2, restricting the vertical position of the compression block. The plane 2-8 is in contact with the plane 3-1, and the plane 1-2 is in contact with the plane 3-6, thereby restricting the motion freedom of the compression block in the horizontal direction.

In the initial state, the direction of pressure applied by the compression block 3 to the rotating block 2 is the normal direction of the contact surface between the first stress part 2-8 of the rotating block and the first force application part 3-1 of the compression block. In order to obtain the best match between the stroke of the compression block 3 and the angle of rotation of the rotating block 2, the inclination angle of the first main plane 1-7 of the main body 1 can be selected, so that the angle between the pressure direction and the first main plane 1-7 is within the range of 15°-60°.

When the optical fiber is pressed according to the prior art, the pressure direction of the force application part is basically perpendicular or parallel to the plane where the optical fiber is placed. Whereas, the first main plane of the optical fiber mechanical splice of the present invention is inclined, the V-shaped groove integrates with the main body, and the rotation angle of the rotating block is controlled by the force application plane, thus it has such advantages as high positioning accuracy, simple and reliable structure, suitability for mass production and low cost.

In reference to Figures 14 and 15, the compression block 3 is further pressed down, and the optical fiber mechanical splice is in the joining completion state. In the completion state, the compression block is pressed down until the plane 3-5 is in contact with the plane 1-3, the second force application part (plane 3-3) of the compression block pushes the second stress part (plane 2-9) of the rotating block 2, so as to push the second main plane (plane 2-6) to get close to the first main plane (plane 1-7) until the fourth auxiliary plane (plane 1-11) is in contact with the second auxiliary plane (plane 2-3) , thus pushing the rotating block 2 to rotate, so that the plane 2-7 presses against one or more pieces of optical fiber passed into the V-shaped groove, thus pressing or aligning the optical fiber in the V-shaped groove 1-5. At this time, as the first force application part (plane 3-1) is detached from the first stress part (plane 2-8) , the first auxiliary plane (plane 2-1) and the third auxiliary plane (plane 1-6) are in the open state.

It should be noted that, from the initial state to the completion state, the plane 2-6 (the second main plane) gets close to the plane 1-7 (the first main plane) to press the optical fiber. In the pressing state： the angle of rotation of the second main plane toward the first main plane is equal to the angle of rotation of the second auxiliary plane toward the fourth auxiliary plane； taking into account the elasticity or deformation of the material, the two rotation angles may be basically the same, and the basic concept of the present invention still can be achieved.

In the completion state, the direction of pressure applied by the compression block 3 to the rotating block 2 is the normal direction of the contact surface between the second stress part 2-9 of the rotating block and the second force application part 3-3 of the compression block. The optical fiber located in the V-shaped groove is under the pressure of the concave surface 2-7 on the second main plane 2-6 of the rotating block 2, the pressure direction is the normal direction of the contact surface between the plane 2-7 and the optical fiber. The angle between the two directions of pressure can be selected within the range of 40°-75°.

In the completion state, the clasp 4-4 formed by the convex platform 1-8 and the stepped surface 3-2 clasps the compression block 3. It should be noted that the positions where the recess 3-4 and stepped surface 3-2 of the compression block 3 are located use elastic material, which enables the compression block 3 to spring back when it is pressed to reach the initial state or the completion state, so as to combine with the convex platform 1-9 or the convex platform 1-8 of the main body 1 to form a clasping relationship.

In this embodiment, the convex portion (convex platform 1-8 and convex platform 1-9) constituting part of the clasp is provided on the main body 1, and the concave portion (stepped surface 3-2 and recess 3-4) is provided on the compression block 3. It should be understood that, if the position of the convex portion on the main body 1 and the position of the concave portion on the compression block 3 are exchanged or crossed over, i. e. , the convex portion is provided on the compression block 3, and the concave portion is provided on the main body 1, or a convex portion and a concave portion are provided on the main body 1, and a convex portion and a concave portion are provided on the compression block 3, the object of the present invention can also be achieved.

In this embodiment, a convex platform 1-8 is provided at either end of the accommodating chamber of the main body 1 in the axial direction, and a long convex platform 1-9 is provided in the middle portion； a stepped surface 3-2 is provided at either end of the compression block 3 in the axial direction, and a long recess 3-4 is provided in the middle portion. It should be understood that these convex and concave portions may be provided at other positions, or their number may be changed, so long as the clasping function can be achieved in the two work states (initial state and completion state) , and the compression block 3 can be positioned at two different positions； in this way, the object of the present invention can also be achieved.

Specific embodiment 2： Embedded field-fabricated optical fiber connector

In reference to Figures 16-30, another specific embodiment of the present invention is shown, that is, the embedded quick optical fiber connector 200 based on the optical fiber mechanical splice. The optical fiber connector comprises a housing 5, embedded optical fiber 6, core insert 7, tail handle body 8, rotating block 2, compression block 3, spring 9, backbone 10 and cable fixture 11. Figure 16 shows the state of the optical fiber connector of this embodiment after the cable joining is completed； Figure 17 shows the assembly relationship of its various components. In the Figures 18 and 19, the housing 5 and cable fixture 11 are not installed.

The housing 5 can be connected with the interface of the optical fiber connector adapter. The optical fiber mechanical splice device located in the housing 5 comprises the tail handle body 8, rotating block 2 and compression block 3. The optical fiber mechanical splice device mentioned here is similar to the optical fiber mechanical splice of the embodiment 1, except that the main body 1 is changed into tail handle body 8； specifically, as shown in Figures 24 and 25, the tail handle body 8 is made by providing the projection 8-1 and the recess 8-2 at both ends of the main body 1 respectively. The projection is slightly larger than the hole 10-2 of the backbone 10, when the projection 8-1 is squeezed through the hole 10-2, it will be obstructed by the plane 10-3 from moving back, so that it can be assembled in the backbone 10. The recess 8-2 is integrally connected with the periphery 7-2 of the core insert 7, and the connection can be achieved by gluing, tight fitting, or combination of key and keyway.

Figure 20 show the structure with the embedded optical fiber 6, core insert 7, tail handle body 8, rotating block 2 and compression block 3 assembled. The core insert 7 is connected with the optical fiber mechanical splice device, and a piece of embedded optical fiber 6 is installed in the core insert 7. The end surface of the first end of the embedded optical fiber 6 is nearly parallel to one end surface (surface 7-1, see Figure 23) of the core insert 7, and the second end of the embedded optical fiber is preset in the first half of the V-shaped groove channel 4-3 of the optical fiber mechanical splice device (see Figure 21) , so as to connect with the core 12-1 of the second optical fiber 12 in the V-shaped groove 1-5. The way of optical fiber connection is similar to that of the specific embodiment 1, that is, a rotating block 2 is placed in the accommodating chamber of the tail handle body 8, and a compression block 3 is pressed in at two stages. In the initial state of the first pressure application stage, the core 12-1 of the second fiber 12 can be passed and then placed into the V-shaped groove 1-5, and gets close to the second end of the embedded optical fiber 6. In the completion state of the second pressure application stage, the tail handle body 8 gets close to the two main planes of the rotating block 2 to press the optical fiber.

In this embodiment, V-shaped groove presses the core 12-1 of the second optical fiber 12. Of course, if the size of the V-shaped groove channel is segmented and can accommodate the optical fiber core with a coating layer 12-2, the optical fiber core 12-1 to be pressed may also include a coating layer 12-2, and the object of the present invention can also be achieved.

As shown in Figure 17, the backbone 10 keeps the optical fiber mechanical splice device and the core insert 7 inside the housing 5. In reference to Figure 26, the backbone 10 includes a clamping unit 10-4 which can fix the cable sheath of the second optical fiber. The cable fixture 11 and the clamping unit 10-4 of the backbone 10 work together to fix the cable.

To fix the cable sheath, a flip cover can be used for clamping (the flip cover may be connected with the backbone through the axle hole provided, or may integrate with the backbone 10 and the material where the flip cover integrates with the backbone 10 is thinned, so that the flip cover can be folded and flipped) , or a metal plate can be inserted into the backbone 10 to clasp the cable sheath. Whether the clamping unit 10-4 is connected with the cable fixture 11 through clamp, flip cover, nut or any other form for the purpose of cable fixing, and whether the cable fixture 11 is integral with or separated from the clamping unit 10-4, the object of the present invention can be achieved.

Figures 16-19, 28, and 29 show the assembly relationship between the assembly parts and the backbone：

Put the spring 9 into the chamber 10-1 of the backbone 10, then put the tail handle body assembly not containing the compression block 3 into the chamber 10-1, and press it to the assembly position as shown in Figures 18 and 19； under the joint action of the projection 8-1 of the tail handle body 8 and the spring 9, the pressed assembly is kept in the chamber 10-1 of the backbone 10； then, install the compression block 3 from the opening on the backbone 10. The tail handle body 8 is provided with the key 8-3, a keyway 10-5 is provided inside the backbone 10 (see Figure 31) , and the key 8-3 and the keyway 10-5 work together to restrain the tail handle body assembly from rotating inside the backbone.

Operation of the embedded field-fabricated optical fiber connector of this embodiment：

As shown in Figure 30, strip off part of the cable sheath 12-3 of the second optical fiber cable 12 to expose the optical fiber core 12-1, pass the optical fiber core 12-1 through the V-shaped groove channel until the end surface of the optical fiber core 12-1 and the end surface of the second end of the embedded optical fiber get close, press down the compression block 3 to push the rotating block 2 to press the optical fiber in the channel into the V-shaped grooves 1-5, so as to complete mechanical joining between the embedded optical fiber 6 and the optical fiber core 12-1, then install the cable sheath fixture 11, fix the cable and put on the housing 5 to complete field installation of the connector.

Specific embodiment 3： Through-type field-fabricated optical fiber connector

In reference to Figures 32 and 33, the through-type field-fabricated optical fiber connector 300 of the present invention has no embedded optical fiber 6 in comparison with the embedded field-fabricated optical fiber connector 200 of the specific embodiment 2. At the time of field installation, pass the optical fiber core 12-1 through the V-shaped groove channel 4-3 until the end surface of the optical fiber core 12-1 is nearly parallel to the end surface 7-1 of the core insert 7, press down the compression block 3 to clamp the optical fiber in the V-shaped groove channel 4-3, then install the cable sheath fixture 11, fix the cable and put on the housing 5 to complete field installation of the connector 300. In this embodiment, the fixture 11 is a nut jacket, and the nut is screwed onto the backbone to press the clamping unit against the cable sheath, so as to fix the cable. Of course, a flip cover can be used for clamping (the flip cover may be connected with the backbone through the axle hole provided, or may integrate with the backbone 10 and the material where the flip cover integrates with the backbone 10 is thinned, so that the flip cover can be folded and flipped) , or a metal plate can be inserted into the backbone 10 to clasp the cable sheath. Whether the clamping unit 10-4 is connected with the cable fixture 11 through clamp, flip cover, nut or any other form for the purpose of cable fixing, and whether the cable fixture is integral with or separated from the clamping unit 10-4, the object of the present invention can be achieved.

At the time of field installation, pass the optical fiber core 12-1 through the V-shaped groove channel 4-3 and into the core insert 7 until the end surface of the optical fiber core 12-1 is nearly parallel to the end surface 7-1 of the core insert 7, press down the compression block 3 to push the rotating block 2 to clamp the optical fiber core 12-1 in the V-shaped groove channel 4-3, then install the cable sheath fixture 11 to press the clamping unit 10-4 against the cable sheath to fix the cable, and put on the housing 5 to complete field installation of the through-type field-fabricated optical fiber connector 300.

Specific embodiment 4： An optical fiber connector, wherein the backbone 10 and the cable fixture 11 are fixed together through the combination of the projection 10-8 on both sides of the backbone 10 and the locking part 11-1 of the cable fixture 11.

This specific embodiment uses the combination of the projection 10-8 on both sides of the backbone and the locking part 11-1 of the cable fixture 11 to provide a faster installation, so as to make the field installation of an optical fiber connector more convenient. In addition, the structure of the backbone 10 and the cable fixture 11 is more simple, and thus their manufacturing cost will be lower. Furthermore, the clamping portion 11-7 of the backbone 10 has one or more clamping units, preferably three clamping units, to provide a more secured clamping for the cable. Different combinations of the clamping units provided by this embodiment can be used to fit different types of cables. On one hand, the cable can be fixed more securely； on the other hand, this embodiment is applicable to various types of cables. This improves the performance of the optical fiber connector in this embodiment, making the optical fiber connector more convenient to use and have wider applications.

Figure 34A is an exploded view of the optical fiber connector of the embodiment of the present invention. In this embodiment, the front end of the cable fixture 11 is the locking part 11-1, and the cable fixture 11 is fixed onto the backbone 10 through the combination of the projection 10-8 on both sides of the backbone 10 and the locking part 11-1. This fastening method is applicable to the optical fiber connectors of the present invention, including embedded field-fabricated optical fiber connector and through-type field-fabricated optical fiber connector. The optical fiber connector with the housing 5, backbone 10 and cable fixture 11 assembled can be seen in Figure 34B.

Figures 35A-35F show different views of the embodiment of the present invention when the cable fixture 11 is installed onto the backbone 10. As shown in Figure 35A, the backbone 10 is covered by the cable fixture 11 after the cable 12 is passed into the backbone 10, so as to clamp and fix the cable 12.

Figure 35B shows a left view of the combination after the cable fixture 11 is fixed onto the backbone 10. Corresponding to the left view in Figure 35B, Figures 35C-35F show the following：

Figure 35C is a front view of the combination after the cable fixture 11 is fixed onto the backbone 10；

Figure 35D is a right view of the combination after the cable fixture 11 is fixed onto the backbone 10, wherein the backbone 10 is reversed before it is covered by the cable fixture 11, and this way of combination can also fasten them together, making it easier for installation；

Figure 35E is a top view of the combination after the cable fixture 11 is fixed onto the backbone 10；

Figure 35F is a right view of the combination after the cable fixture 11 is fixed onto the backbone 10.

Figures 36A-36C are flow charts of the installation of the cable fixture 11 onto the backbone 10 in the embodiment of the present invention.

As shown in Figure 36A, the front end of the cable fixture 11 is the locking part 11-1, and the locking part 11-1 also forms the opening of the cable fixture 11. The locking part 11-1 is provided with one or more trenches 11-2, preferably two trenches 11-2； the number and distribution of the trenches are corresponding to that of the projections 10-8 on the backbone 10. For example, there is a projection 10-8 on either side of the backbone 10, and a trench 11-2 is provided on one side and the opposite side of the locking part 11-1 respectively, so as to accommodate the projections 10-8.

The trench 11-2 communicates with the opening of the cable fixture 11, so that the projection 10-8 on the backbone 10 is allowed to enter the trench 11-2 and be accommodated therein while the backbone 10 enters the cable fixture 11. As shown in Figure 36B, one end of the trench 11-2 communicates with the opening of the cable fixture 11 and then traverses gradually, and eventually, the other end of the trench 11-2 and the opening of the cable fixture 11 will be approximately balanced. In other words, the back portion of the trench 11-2 is substantially perpendicular to the opening of the cable fixture 11. Thus, to move toward the end of the cable fixture 11, the projection 10-8 also needs rotation relative to the cable fixture 11 to move along the trench 11-2, so as to cover the backbone 10 with the cable fixture 11. When compared with joining by threads, this embodiment allows the fastening between the backbone 10 and the cable fixture 11 to be done within less than one rotation and hence it is obviously more convenient.

The projection 10-8 keeps moving toward the end of the trench 11-2, and eventually it will engage with the recess 11-3 at the end of the trench 11-2 as shown in Figure 36B； therefore, if you need to release the backbone 10 from the cable fixture 11, you have to first squeeze the backbone 10 into the cable fixture 11, so as to disengage the projection 10-8 from the recess 11-3 at the end of the trench 11-2, and then you need to rotate the cable fixture 11 along its axis, so as to separate the projection 10-8 from the trench 11-2. Thus, the projection 10-8 on the backbone 10 and the trench 11-2 on the locking 11-1 can effectively fix the cable fixture 11 and the backbone 10 together.

Figures 37A and 37B are sectional views of different sections of the backbone 10 with the cable fixture 11 installed in the embodiment of the present invention. Figure 37A is a sectional view along the section 37A, and it can be seen that the chamber of the cable fixture 11 is narrowed from its opening to its tail end, in other words, the chamber space close to the opening of the cable fixture 11 is larger than that close to the tail end of the cable fixture 11. When the cable fixture 11 covers the backbone 10, the inner wall of the cable fixture 11 will squeeze the backbone 10, clamping portion 10-7 of the backbone 10 and the clamping unit 10-4 of the clamping portion 10-7. Under such pressure, the clamping portion 10-7 and the clamping unit 10-4 will deform, and squeeze the cable 12 located inside them, so as to clamp the cable 12 securely.

Figure 37B is a sectional view along the section 37B, wherein the backbone 10 is provided with a convex portion 10-6, and its surface facing the direction of the clamping unit 10-4 has an inclined plane, the convex portion 10-6 props against the cable fixture 11, so as to limit the length of the backbone 10 covered by the cable fixture 11, and prevent the cable fixture 11 from covering the backbone 10 excessively. The backbone 10 may have one or more convex portions 10-6, preferably three convex portions, which are located in different positions around the same circle on the outer wall of the backbone 10, and the convex portion 10-6 may be a flange.

Figures 38A-38F are various views of the backbone 10 in the embodiment of the present invention.

Figure 38A shows perspective views of the backbone 10 at different angles； the backbone 10 has one or more convex portions 10-6 on its outer wall, meanwhile, it is also provided with one or more projections 10-8. At least two plates extend from the tail end of the backbone 10 to form the clamping portion 10-7, the inner wall of each clamping portion 10-7 has one or more clamping units 10-4, preferably including the first clamping unit 10-41, the second clamping unit 10-42 and the third clamping unit 10-4, each clamping unit 10-4 can be used to clamp the cable or used as a baffle to obstruct the leading-in optical fiber cable from passing through, and different combinations of clamping units may be provided to match different types of optical fiber cables.

Figure 38B is a right view of the backbone 10, wherein the backbone 10 has a clamping portion 10-7, and the end of the clamping portion 10-7 is slightly narrowed to facilitate the insertion of the cable fixture 11.

Figure 38C is a front view of the backbone 10； as shown in the figure, the clamping portion 10-7 is provided with the first clamping unit 10-41, the second clamping unit 10-42 and the third clamping unit 10-4, the openness of each clamping unit may vary according to the needs. For example, the first clamping unit 10-41 is only as a baffle to obstruct the leading-in optical fiber cable from passing through, so its openness can be smaller. Different clamping units are located at different positions on the clamping portion 10-7, and each clamping unit has a corresponding clamping unit on the opposite clamping portion 10-7, so as to combine to produce clamping effect.

Figure 38D is a sectional view of the backbone 10 along the section 10A. As shown in the figure, the first clamping unit 10-41 is used as a baffle for the 1.6×2mm leading-in optical fiber cable, so that the first clamping unit 10-41 obstructs the 1.6 × 2mm leading-in optical fiber cable from passing through after the passage of the optical fiber core in the 1.6 × 2mm leading-in optical fiber cable.

Figure 38E is a sectional view of the backbone 10 along the section 10B. As shown in the figure, the second clamping unit 10-42 is used as a baffle for the 2 × 3mm leading-in optical fiber cable or the leading-in optical fiber cable with a diameter of 3mm, so that the second clamping unit 10-42 obstructs the leading-in optical fiber cable from passing through after the passage of the optical fiber core in either of the two types of leading-in optical fiber cables.

Relative to the first clamping unit 10-41, the second clamping unit 10-42 is located in an outer position on the clamping portion 10-7. The 2×3mm leading-in optical fiber cable or the leading-in optical fiber cable with a diameter of 3mm to be obstructed by the second clamping unit 10-42 needs to have a longer exposed optical core, so as to ensure that the optical fiber core has a sufficient length for connection.

It can also be seen in the figure that the clamping surface 10-421 on the second clamping unit 10-42 is used to clamp the 1.6 × 2mm leading-in optical fiber cable.

Figure 38F is a bottom view of the backbone 10. The third clamping unit 10-4 can be seen in the figure. The third clamping unit 10-4 has a clamping surface, which is used to clamp the 2 × 3mm leading-in optical fiber cable or the leading-in optical fiber cable with a diameter of 3mm.

Figure 39 is a perspective view of the backbone 10 with the cable fixture 11 installed in the embodiment of the present invention. As shown in the figure, the backbone 10 can be firmly covered by the cable fixture 11 through locking the projection 10-8 on the backbone 10 into the recess at the end of the trench 11-2 on the locking part 11-1 of the cable fixture 11.

Figure 40 is a perspective view of the backbone 10 with the cable fixture 11 installed in the embodiment of the present invention, wherein the cable fixture 11 is cut half-open. At the time of putting the cable fixture 11 on the backbone 10, in order to prevent the backbone 10 from passing through the cable fixture 11 excessively, or ensure that the cable fixture 11 is kept in the required position other than any other position on the backbone 10, it can be seen in the figure that besides a convex portion 10-6 is provided on the backbone 10 to prop against the cable fixture 11, the inner wall of the tail end opening of the cable fixture 11 has a flange, so that when the backbone cable 10 is fully inserted into the cable fixture 11, the backbone 10 will be obstructed by the flange on the inner wall of the tail end opening of the cable fixture 11； even ifthe backbone 10 deforms due to squeezing, it still can not pass through the flange.

Figures 41A-41D are flow charts of the installation of the optical fiber cable 12 onto the backbone 10 of the optical fiber connector of the present invention, wherein the optical fiber cable 12 is 2 × 3mm leading-in cable. Figures 41A-41D show the embodiment of the present invention using 2×3mm leading-in optical fiber cable as the optical fiber cable 12. Figure 41A shows the first step for the installation of the optical fiber cable 12： Align the optical fiber cable 12 with the hole of the backbone 10 and push forward.

Figure 41B shows the second step for the installation of the optical fiber cable 12： Pass the optical fiber cable 12 through the backbone 10, and the optical fiber core 12-1 may bend when passing through the hole of the backbone 10.

Figure 41C shows the third step for the installation of the optical fiber cable 12： Keep flat and straighten the optical fiber core 12-1 in the V-shaped groove of the backbone 10, clamp it with the clamping unit 10-4 and fix the optical fiber cable 12.

Figure 41D shows the fourth step for the installation of the optical fiber cable 12： Put the cable fixture 11 on the backbone 10, and screw down to fix the cable 12.

Figures 42A-42D are flow charts of the installation of the optical fiber cable 12 onto the backbone 10 of the optical fiber connector of the present invention, wherein the optical fiber cable 12 is 1.6 × 2mm leading-in cable. Figures 42A-42D show the embodiment of the present invention using 1.6×2mm leading-in optical fiber cable as the optical fiber cable 12. Figure 42A shows the first step for the installation of the optical fiber cable 12： Align the optical fiber cable 12 with the hole of the backbone 10 and push forward.

Figure 42B shows the second step for the installation of the optical fiber cable 12： Pass the optical fiber cable 12 through the backbone 10, and the optical fiber core 12-1 may bend when passing through the hole of the backbone 10.

Figure 42C shows the third step for the installation of the optical fiber cable 12： Keep flat and straighten the optical fiber core 12-1 in the V-shaped groove of the backbone 10, clamp it with the clamping unit 10-4 and fix the optical fiber cable 12.

Figure 42D shows the fourth step for the installation of the optical fiber cable 12： Put the cable fixture 11 on the backbone 10, and screw down to fix the cable 12.

Figures 43A-43D are flow charts of the installation of the optical fiber cable 12 onto the backbone 10 of the optical fiber connector of the present invention, wherein the optical fiber cable 12 is a circular leading-in cable with a diameter of 3mm. Figures 43A-43D show the embodiment of the present invention using the circular leading-in optical fiber cable with a diameter of 3mm as the optical fiber cable 12. Figure 43A shows the first step for the installation of the optical fiber cable 12： Strip off part of the cable sheath 12-3 at the end of the optical fiber cable 12 to expose the optical fiber core 12-1, and the optical fiber core 12-1 is covered with a coating layer 12-2. Meanwhile, Figure 43A also shows an enlarged exploded view of the optical fiber core 12-1 enclosed by the cable sheath 12-3.

Figure 43B shows the second step for the installation of the optical fiber cable 12： Pass the optical fiber cable 12 through the backbone 10, and the optical fiber core 12-1 may bend when passing through the hole of the backbone 10.

Figure 43C shows the third step for the installation of the optical fiber cable 12： Keep flat and straighten the optical fiber core 12-1 in the V-shaped groove of the backbone 10, clamp it with the clamping unit 10-4 and fix the optical fiber cable 12.

Figure 43D shows the fourth step for the installation of the optical fiber cable 12： Put the cable fixture 11 on the backbone 10, and screw down to fix the cable 12.

A detailed description of the preferred embodiments of the present invention is given above. It should be understood that those of ordinary skill in the art can make various modifications and changes according to the concept of the present invention without creative work. Therefore, on the basis of prior art, all technical solutions obtained by those skilled in the art through logical analysis, reasoning or limited experiments according to the concept of the present invention shall be within the scope of protection defined by the appended claims.

Claims

An optical fiber connector, comprising:

a housing suitable for connection with the interface of the optical fiber connector adapter；

an optical fiber mechanical splice, comprising:

a main body；

a rotating block； and

a compression block；

wherein either end of the main body has an opening for a passage of the optical fiber to be joined；

wherein the main body has a first main plane axially parallel to the optical fiber, and the first main plane has a V-shaped groove extending axially along the optical fiber；

wherein the rotating block has a second main plane；

wherein the main body has an accommodating chamber to accommodate the rotating block, and the second main plane of the rotating block faces the first main plane of the main body；

wherein the compression block is inserted between the rotating block and the main body, which presses the rotating block and drives the rotating block to rotate relative to the main body；

wherein when the rotating block rotates relative to the main body, the first main plane and the second main plane can switch between the open position and the closed position；

wherein the open position refers to that the first main plane and the second main plane in the open state, and the closed position refers to that the second main plane is as close as possible to the first main plane； and

wherein the optical fiber mechanical splice is located in the housing；

a core insert connected with the optical fiber mechanical splice；

a backbone which keeps the optical fiber mechanical splice and the core insert inside the housing, wherein the backbone comprises one or more clamping units which fix the cable sheath of the second optical fiber； and

a cable fixture, the cable fixture and the clamping unit of the backbone work together to fix the cable, comprising one or more trenches communicating with the opening of the cable fixture, which accommodates one or more projections on the backbone, and the projections are locked into the trenches to fasten the cable fixture onto the backbone.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that in case of the open position, the first main plane and the second main plane form a first angle； in the case of the closed position, the first main plane and the second main plane form a second angle, and the second angle is less than the first angle.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that in the case of the open position, the angle between the first main plane of the main body and the direction of pressure applied on the rotating block when the compression block is inserted is within the range of 15°-60°.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that in the case of the closed position, the optical fiber located in the V-shaped groove is pressed by the second main plane, and the angle between the direction of pressure applied by the second main plane on the optical fiber in the V-shaped groove and the direction of pressure applied on the rotating block when the compression block is inserted is within the range of 40°-75°.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that the section of the openings on both ends of the main body is U-shaped.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that the opening at either end of the main body is a hole, the two holes are coaxial, and the minimum diameter of the hole is slightly larger than the outer diameter of the optical fiber； when the optical fiber is located in the V-shaped groove, the axis of the optical fiber coincides with the axis of the two holes.
The optical fiber connector of claim 6, wherein the optical fiber mechanical splice is characterized in that the hole becoming gradually larger from inside to outside is bell-shaped or cone-shaped.
The optical fiber connector of claim 6, wherein the optical fiber mechanical splice is characterized in that the cross-section of the hole is circular, oval or polygonal.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that the two axial ends of the V-shaped groove also have an inclined guide surface.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that the second main plane of the rotating block is a complete plane, which, together with the V-shaped groove, constitutes the V-shaped groove channel to accommodate the optical fiber.
The optical fiber connector of claim 10, wherein the optical fiber mechanical splice is characterized in that the two ends of the second main plane also have an inclined guide wall.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that the second main plane of the rotating block also has a recess which is located above the V-shaped groove and extends axially along the optical fiber, and the recess and the V-shaped groove constitute the accommodating channel to accommodate the optical fiber.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that:

the rotating block has a first auxiliary plane and a second auxiliary plane, and a first angle is formed between the first auxiliary plane and the second auxiliary plane； the rotating block also has a stress plane, and the stress plane has a first stress part and a second stress part；

the main body has a third auxiliary plane and a fourth auxiliary plane, and a second angle is formed between the third auxiliary plane and the fourth auxiliary plane；

the first angle is greater than the second angle；

the compression block has a first force application part and a second force application part；

in the case of the open position, the first force application part presses the first stress part, and the second force application part does not contact with the second stress part, so that the first auxiliary plane clings to the third auxiliary plane； in addition, the second auxiliary plane is separated from the fourth auxiliary plane, and the second main plane and the first main plane are in the open state；

in the case of the closed position, the second force application part presses the second stress part, the first force application part is separated from the first stress part, and the first auxiliary plane is separated from the third auxiliary plane； in addition, the second auxiliary plane clings to the fourth auxiliary plane, and the second main plane and the first main plane are in the closed state to press the optical fiber between them.
The optical fiber connector of claim 13, wherein the optical fiber mechanical splice is characterized in that in the case of the open position, the first force application part presses the first stress part, and the first auxiliary plane clings to the third auxiliary plane.
The optical fiber connector of claim 14, wherein the optical fiber mechanical splice is characterized in that in the case of the open position, the fourth auxiliary plane comes into contact with the second auxiliary plane at the root.
The optical fiber connector of claim 13, wherein the optical fiber mechanical splice is characterized in that the compression block has two first force application parts, the two first force application parts are axially located at the two ends of the compression block respectively, the rotating block has two first stress parts, the two stress parts are axially located at the two ends of the rotating block and correspond to the two first force application parts respectively.
The optical fiber connector of claim 1, wherein the optical fiber mechanical splice is characterized in that:

there is a first clasp and a second clasp between the main body and the compression block；

there is a first convex platform between the main body and the compression block, there is a first concave surface between the main body and the compression block, and the first convex platform and the first concave surface constitute the first clasp； in the case of the open position, the first convex platform and the first concave surface clasp；

there is a second convex platform between the main body and the compression block, there is the second concave surface between the main body and the compression block, and the second convex platform and the second concave surface constitute the second clasp； in the case of the closed position, the second convex platform and the second concave surface clasp.
The optical fiber connector of claim 17, wherein the optical fiber mechanical splice is characterized in that the first convex platform and the second convex platform are located on the main body； the first concave surface and the second concave surface are located on the compression block.
The optical fiber connector according to claim 18, wherein the optical fiber mechanical splice is characterized in that the first concave surface and the second concave surface located on the compression block are resilient.
The optical fiber connector of claim 18, wherein the optical fiber mechanical splice is characterized in that the main body has two second convex platforms, the two second convex platforms are axially located at the two ends of the accommodating chamber inside the main body respectively, the compression block has two said second concave surfaces, and the two second concave surfaces are axially located at the two ends of the compression block respectively.
The optical fiber connector according to any of claims 1-20, characterized in that: comprising a piece of embedded optical fiber installed in the core insert, wherein the end surface of a first end of the embedded optical fiber is nearly parallel to one end surface of the core insert, a second end of the embedded optical fiber is preset in the first half of the V-shaped groove channel of the optical fiber mechanical splice, so as to connect with the core of the second optical fiber in the V-shaped groove.
The optical fiber connector according to any of claims 1-20, characterized in that the clamping unit is a baffle, which obstructs the leading-in optical fiber cable from passing through.
The optical fiber connector according to any of claims 1-20, characterized in that the backbone comprises one or more projections, which prop against the cable fixture, thereby limiting the length of the backbone covered by the cable fixture.
[Added]
24. An optical fiber connector, comprising:
a housing suitable for connection with the interface of the optical fiber
connector adapter;
an optical fiber mechanical splice;
a core insert connected with the optical fiber mechanical splice;
a backbone which keeps the optical fiber mechanical splice and the
core insert inside the housing, wherein the backbone comprises one or more
clamping units which fix the cable sheath of the second optical fiber; and
a cable fixture, the cable fixture and the clamping unit of the backbone
work together to fix the cable, comprising one or more trenches communicating
with the opening of the cable fixture, which accommodates one or more
projections on the backbone, and the projections are locked into the trenches to
fasten the cable fixture onto the backbone.