TWI733267B - Optical coupler - Google Patents

Abstract

A light-trapping coupler, comprising a housing with a transparent window on the periphery of the window is distributed with centrally symmetrical first fixing parts; and a fixing block, the side of which is provided corresponding to the first fixing The second fixing part of the fixed block is respectively connected with the corresponding first fixing parts through the second fixing parts on the side of the fixing block. The invention twists and clamps the fixing block on the coupler shell through the expansion and extrusion of the hook body, and can be installed quickly and conveniently without fixing parts such as screws and rivets and installation tools, and has high production efficiency.

Description

Optical coupler

The present invention relates to a maintenance technical field involving optical fiber communication systems, in particular to an optical coupler.

With the increasing requirements for high-speed information dissemination, optical fiber has become more and more widely used as a high-speed information carrier, and the monitoring of optical fiber connection points has gradually been put on the agenda. Especially in the 5G era, the application of optical fiber lines has become more and more extensive. The number of optical fiber splice points has also increased rapidly in geometrical levels. The routing management and splice quality control of optical fiber splice points are becoming more and more important. Therefore, the method of detecting overflow light at the optical fiber splice points by the photosensitive element has emerged (patent number: The invention patent of CN104717008B has a detailed description). Most optical fiber couplers are installed in the tray on the ODF (Optical Distribution Frame). There are various installation methods and the installation space is limited. How to install the photosensitive element into the optical fiber coupler conveniently, compactly and reliably to protect the photosensitive element from the outside world Light interference has become a key technical problem that needs to be solved in this field. At the same time, how to install the light guide element into the fiber coupler conveniently, compactly and reliably, and export the detection light leaking from the connection point, indicating that the construction personnel have found the fiber line Routing information has also become a key issue that needs to be resolved in this field. Key technical issues.

The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, the description abstract and the title of the invention in this application to avoid obscuring the purpose of this part, the description abstract and the title of the invention, and such simplifications or omissions cannot be used to limit the scope of the present invention.

In view of the above and/or the problems existing in the existing optical fiber coupler, the present invention is proposed.

Therefore, one of the objectives of the present invention is to provide a light-trapping coupler, which can facilitate the installation of the photosensitive element on the coupler, which is convenient and quick.

In order to solve the above technical problems, the present invention provides the following technical solutions: a light-trapping coupler, which includes a housing with a transparent window thereon, and center-symmetric first fixing members are distributed around the window; and A fixing block is provided with second fixing pieces corresponding to the first fixing pieces on its side, and the fixing block is respectively connected with the corresponding first fixing pieces through the second fixing pieces on the side.

As a preferred solution of the optical coupler of the present invention, wherein: the first fixing parts are a plurality of snap hooks, the second fixing parts are a plurality of buckle plates, and the fixing blocks are respectively connected to the corresponding buckle plates through the buckle plates. The snap hooks are snapped to each other.

As a preferred solution of the light-trapping coupler of the present invention, each of the clamping hooks includes a column fixed on the outer surface of the housing and a hook head fixed on the top of the column.

As a preferred solution of the light-trapping coupler of the present invention, the lower surface of the hook head has a first barb facing inward, and the upper surface of each buckle plate has a first barb corresponding to the first barb. A second barb, the second barb and the first barb have the same structure and complement each other.

As a preferred solution of the light-trapping coupler of the present invention, when the buckle plates are twisted into the engaging hooks, the first barbs and the second barbs hug each other, and the buckle plates The lower surface is in contact with the outer surface of the casing, and an outer end surface of the second barb is attached to the inner surface of the upright column.

As a preferred solution of the light-trapping coupler of the present invention, at least two centrally symmetrical first fixing members are distributed around the window, and the side of the fixing block is provided with the same first fixing members. A corresponding second fixing member.

As a preferred solution of the light-trapping coupler of the present invention, each hook head symmetrical in the center may be oriented counterclockwise or clockwise.

As a preferred solution of the light-trapping coupler of the present invention, a photosensitive element is provided on the lower surface of the fixing block, and the photosensitive element is inserted downwardly into the window and extends into the housing.

As a preferred solution of the optical coupler of the present invention, wherein: The fixing block is made of light-transmitting material, and the lower surface of the fixing block is provided with a downwardly protruding light guide rod, and the light guide rod is inserted downwardly into the window and extends to the inside of the housing.

As a preferred solution of the light-trapping coupler of the present invention, the lower end surface of the light guide rod is a spherical light-collecting surface.

As a preferred solution of the light-trapping coupler of the present invention, the upper surface of the fixing block has a spherical protrusion facing the light guide post.

As a preferred solution of the optical coupler of the present invention, wherein: the two ends of the housing are respectively a first connection end and a second connection end that are adapted to the SC fiber connector, and the inside of the housing is provided with a first connection end and a second connection end. The SC optical fiber connector is inserted into a fixed plate perpendicular to the direction, a second limit sleeve is fixed on the outer surface of the fixed plate, and the plane of the inner side of the fixed plate passes through the central axis of the window.

As a preferred solution of the light-taking coupler of the present invention, it further includes a sliding element, the sliding element includes a sliding block capable of longitudinal sliding inside the first connecting end, and the outer surface of the sliding block is fixed There is a first limit sleeve that is symmetrical to the second limit sleeve and a pair of first hooks located on both sides of the first limit sleeve. A pair of first hooks are fixed on the inner side of the sliding block to be symmetrical to the first hooks. The second pull hook of the fixing plate has two openings corresponding to the second pull hooks on both lateral sides of the fixing plate.

As a preferred solution of the light-trapping coupler of the present invention, when the slider is in contact with the fixing plate, the second pull hooks pass through the through openings and point in the direction of the second connecting end, and the first A hook points to the direction of the first connecting end.

As a preferred solution of the light-trapping coupler of the present invention, two first hooks are provided on both lateral edges of the sliding block, and two first hooks are provided on the inner side wall of the housing. The first mating hook of a hook, the fixing plate is butted with the sliding block, and the first hooks and the first mating hooks are buckled with each other, so that the first limit sleeve and the second The internal passages of the two limit sleeves face each other and communicate to form a combined passage.

As a preferred solution of the light-trapping coupler of the present invention, wherein: the inner side of the slider has a groove fitted to the fixing plate, so that two protrusions are formed on both sides of the groove, The mouth fits the protrusions.

As a preferred solution of the light-trapping coupler of the present invention, two second hooks are provided on the inner side surfaces of the protrusions, and two second hooks are provided on both sides of the fixing plate. The second matching hooks of the two hooks, when the fixing plate is embedded in the groove, the second hooks and the second matching hooks are buckled with each other.

As a preferred solution of the light-trapping coupler of the present invention, the fixing plate is symmetrically provided with two hollow structures corresponding to the second mating hooks in the lateral direction, so that the outer frames of the hollow structures form two Strip elastic ribs, and the second matching hooks are located on the outer edges of the strip elastic ribs.

As a preferred solution of the light-trapping coupler of the present invention, the slider and the fixed plate have semi-cylindrical channels corresponding to each other, and after the two are docked, the semi-cylindrical channels of the two can form a facing window The housing channel, the housing The channel communicates with the combined channel.

As a preferred solution of the light-trapping coupler of the present invention, it further includes a ceramic sleeve, both ends of the ceramic sleeve are inserted into the first limiting sleeve and the second limiting sleeve, respectively.

The beneficial effects of the present invention: the present invention realizes the positioning and packaging of the light extraction component on the optical fiber coupler by twisting the buckle plate on the fixing block and the snap hook on the optical fiber coupler. This connection method uses the elastic expansion and extrusion of the hook body to twist and clamp the fixing block and its light extraction parts on the coupler housing. It can be installed quickly and conveniently without screws, rivets and other fixing parts and installation tools. efficient.

10: Light extraction parts

100: shell

101: Windows

102: Snap hook

1021: lower surface

102a: Column

102b: hook

102b-1: first barb

103: The first connection end

104: second connection end

105: fixed plate

105a: The second limit set

105a-1: The second limit ring

105b: Piercing

105c: second mating hook

105d: hollow structure

105e: Strip elastic tendon

106: first matching hook

200: fixed block

201: gusset

201a: second barb

201a-1: Outer end face

202: fixed slot

203: Wiring hole

204: Light guide

204a: Glossy surface

205: spherical convex

300: photosensitive element

301: Lead

302: Flexible circuit board

400: Sliding element

401: Slider

401a: Groove

401b: raised

401c: first hook

401d: second hook

402: The first limit set

402a: The first limit ring

403: first hook

404: second hook

405: Semi-cylindrical channel

500: ceramic sleeve

501: Seam

A: First side

B: Second side

C: Third side

D: Fourth side

T: Combination channel

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative labor, other drawings can be obtained from these drawings. Among them: Fig. 1 is a structural diagram of the fixing block and the housing in the first embodiment of the present invention; Fig. 2 is a schematic diagram of the twisting direction of the gusset plate in the first embodiment of the present invention; Fig. 3 is the first embodiment of the present invention In the example, a schematic diagram of two implementations of the connection between the gusset plate and the snap hook; Fig. 4 is an assembly diagram of the overall structure and a detailed view of the partial structure when the light-trapping component is a photosensitive element in the second embodiment of the present invention; Figure 5 is an explosion when the light-trapping component is a photosensitive element in the second embodiment of the present invention Figure and its partial structure details; Figure 6 is a schematic diagram of the connection between the gusset plate and the snap hook in the second embodiment of the present invention; Figure 7 is the structure of the fixing block adapted to the photosensitive element in the second embodiment of the present invention Figure 8 is an assembly diagram of the overall structure and its partial structure details when the light extraction component is a light guide column in the second embodiment of the present invention; Figure 9 is the second embodiment of the present invention when the light extraction component is a light guide post Figure 10 is a structural diagram of the light guide column in the second embodiment of the present invention; Figure 11 is an exploded view of the optical coupler in the third embodiment of the present invention; Figure 12 is the present invention The inner side structure view of the fixing plate in the third embodiment; Figure 13 is the outer side structure view of the fixing plate in the third embodiment of the present invention; Figure 14 is the side view of the optical coupler in the third embodiment of the present invention Figure 15 is the internal structure diagram of the first connecting end of the housing in the fourth embodiment of the present invention; Figure 16 is the second connection end of the housing in the fourth embodiment of the present invention Internal structure of the connecting end 17 is a structural diagram of a sliding element in a fourth embodiment of the present invention; and FIG. 18 is a side view and a cross-sectional view of the optical coupler in the fourth embodiment of the present invention and a detailed partial structure view thereof.

In order to make the above-mentioned objectives, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention will be described in detail below with reference to the drawings.

In the following description, many specific details are explained in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

Secondly, the "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or selectively mutually exclusive embodiments with other embodiments.

1 to 3, which is the first embodiment of the present invention. This embodiment provides a light-taking coupler. The light-taking component 10 can be installed on the light-taking coupler for extracting the optical fiber from the inside of the coupler. Spill light at the connection point.

The light extraction coupler includes an external housing 100, which is a light extraction coupling A transparent window 101 is provided on the side of the housing 100 of the outer shell of the device. The window 101 is used to install the light-trapping component 10 and is matched with the structure of the light-trapping component 10. In the present invention, the window 101 is located at the middle position of the outer surface of the casing 100 and communicates with the internal cavity of the casing 100 and the external space.

When the two ends of the housing 100 are respectively plugged with optical fiber connectors, the two optical fiber connectors can be butted at an intermediate position inside the housing 100, and the butting surfaces of the ferrules at both ends are the fiber connection points. Therefore, the optical fiber connection point is exposed directly under the window 101 and directly opposite to it. Since the light extraction component 10 can be installed in the window 101, the light extraction component 10 can receive the overflow light at the fiber connection point (generated by incomplete coupling).

In order to realize the installation and fixation of the light extraction component 10 on the light extraction coupler, the light extraction coupler of the present invention further includes a fixing block 200.

Specifically, at least two centrally symmetric first fixing members are distributed around the periphery of the window 101. Preferably, the first fixing member of this embodiment is a snap hook 102. In this embodiment, two snap hooks 102 with central symmetry are distributed around the periphery of the window 101, both of which are fixed on the outer surface of the housing 100. The snap hook 102 may be in the shape of a hook with a hook head at the upper end.

The side of the fixing block 200 is provided with two second fixing pieces corresponding to the first fixing piece. The second fixing piece in this embodiment is a gusset plate 201, and the fixing block 200 is respectively connected to the corresponding gusset plate 201 through its side gusset plate 201. The snap hook 102 is connected, that is, each buckle plate 201 is twisted into the hook of the snap hook 102 through a rotating action, so as to realize the fixing of the fixing block 200 on the outer surface of the housing 100. The above-mentioned light extraction component 10 can adopt photoelectric Electronic components such as diodes are fixed at the lower part of the fixed block 200, so they can be installed on the housing 100 along with the fixed block 200. At the same time, the lower end of the light extraction component 10 can be inserted into the window 101 to receive the overflow light. .

It should be noted that the first fixing member and the second fixing member of this embodiment are not only engaged by the snap-fitting method in which the snap hook and the buckle plate cooperate with each other, the first fixing member and the second fixing member can also be bonded together. , Screw locking and other joining methods are mutually connected and fixed together.

In this embodiment, the connection between the buckle plate 201 and the snap hook 102 can be implemented as follows: 1. The buckle plate 201 is in the shape of a bar, and its cross-sectional profile fits with the inner structure of the hook 102 of the snap hook 102. Therefore, The gusset plate 201 can be twisted into the hook of the snap hook 102 to realize the combination of the two, and prevent the gusset plate 201 from detaching through the friction of the contact surface; 2. The structure of the gusset plate 201 based on the twisting operation of mode one The form is the same as the inner profile of the hook of the snap hook 102, but the size is slightly larger than the inner profile of the hook of the snap hook 102, and the lower surface 1021 of the snap hook 102 is flat, so interference can be achieved after twisting in Cooperate to prevent loosening; Third, based on the twisting operation of mode 1, the lower surface 1021 of the hook of the snap hook 102 has a concave-convex corrugated shape, and the upper surface of the gusset 201 has a complementary concave-convex structure, so through both The structural occlusion between is to achieve tight binding.

4 to 10, the second embodiment of the present invention, this embodiment is based on In Embodiment 1, the difference from Embodiment 1 is: the specific structure of the "snap hook 102" and the "gusset 201" and the connection between the two are as follows: the snap hook 102 includes a vertical fixed to the housing 100 An upright post 102a on the outer side and a hook 102b fixed to the top end of the upright post 102a. Wherein, the upper surface of the hook head 102b may be a flat surface, the lower surface has a first barb 102b-1 (directed inward), and the lower surface of the first barb 102b-1 has a tendency to gradually bulge from the outside to the inside. A slope is formed ("inside" here refers to the direction in which the outer end of the hook head 102b points to the column 102a), and the inner edge of the slope surface forms a step with the lower surface of the hook head 102b, which is described in the present invention The first barb 102b-1.

The upper surface of the gusset 201 has a second barb 201a corresponding to the first barb 102b-1. Preferably, the second barb 201a and the first barb 102b-1 have the same structure and complement each other. When the buckle plate 201 rotates and twists into the snap hook 102, the first barb 102b-1 and the second barb 201a are locked with each other to form a snap connection, and the lower surface of the buckle plate 201 and the outer surface of the housing 100 The side surfaces are in contact, and at the same time, an outer end surface 201a-1 of the second barb 201a is attached to the inner surface of the upright post 102a. In the present invention, the first barb 102b-1 and the second barb 201a are hooked to each other, which can ensure that the fixing block 200 cannot be loosened, and prevent the locking hook 102 from being deformed and loosened during long-term use. It should be noted that the snap hook 102 is made of a material with a certain elastic deformation ability, and has a lateral elastic deformation space, so it can ensure that the buckle plate 201 can be detachably twisted in and twisted out.

It can be seen from the above that the two snap hooks 102 are centrally symmetrically distributed in the window The periphery of 101, but the orientation of the hook 102b is not specified. In fact, each hook 102b of the present invention may be oriented counterclockwise or clockwise.

In the present invention, the function of the fixing block 200 is to install and fix the light-trapping component. The light-trapping component here can be a photoelectric sensing device or a light-guiding light-transmitting medium, which specifically includes the following two embodiments:

1. The photosensitive element 300 is used as the light-trapping component.

The photosensitive element 300 in this embodiment may use a photodiode, the tail end of which has a lead 301 connected to a connecting wire or a flexible circuit board 302.

The photosensitive element 300 is installed on the lower surface of the fixed block 200, inserted downward into the window 101 and extended to the inside of the housing 100, and can receive the overflow light from the optical fiber splice point, which is used for the later optical fiber routing search and optical fiber line fault search ( This is the prior art and will not be repeated here).

Specifically, the lower surface of the fixing block 200 has a fixing groove 202. The size and contour of the fixing groove 202 are matched with the photosensitive element 300. Therefore, the upper end of the photosensitive element 300 is embedded and fixed in the fixing groove 202, and the upper end of the photosensitive element 300 The lead 301 passes through the fixed block 200 and is connected to an external connection line or flexible circuit board 302. Obviously, the fixing block 200 also has a wiring hole 203 fitted to the lead 301, and the wiring hole 203 is located in the range of the fixing groove 202.

Further, the way in which the photosensitive element 300 is fixed in the fixing groove 202 can be simply by interference fit or fixed by glue. The fixing slot 202 and the window 101 are mutually Opposite, both cross sections are circular, and the center line is on the same straight line.

In the present invention, the fixing block 200 not only has the function of installing and fixing the photosensitive element 300, but also can shield the photosensitive element 300 to ensure that the photosensitive element 300 installed on the housing 100 is not interfered by external light, thereby protecting the photosensitive element. 300 working reliability.

2. The light guide 204 is adopted as the light extraction component.

Specifically, the lower surface of the fixing block 200 has a light guide post 204 protruding downward. The light guide post 204 has a cylindrical structure, which is inserted into the window 101 downward and can extend into the housing 100. The fixing block 200 in this embodiment adopts a light-transmitting material as a whole, such as acrylic and other light-transmitting materials. Therefore, it can be ensured that when the lower end of the light guide post 204 receives the overflow light at the optical fiber connection point, it can be transmitted to the external space, which is convenient Perceived by the human eye.

Furthermore, the lower end surface of the light guide post 204 is a spherical light collecting surface 204 a, and the upper surface of the fixing block 200 has a spherical protrusion 205 facing the light guide post 204. The overflow light from the optical fiber connection point can directly enter the light-collecting surface 204a, be conducted in the light guide column 204, and finally spread out from the spherical protrusion 205 on the top surface of the fixed block 200, which is detected by the human eye, and assists in the optical fiber routing search. The function is convenient and effective. Therefore, the setting of the light guide post 204 is mainly used for the routing search of optical fiber lines, or the search for the faulty connection point (the connection point with strong light leakage), and can also be used for the routing verification in the remediation of the computer room. Its production cost is low, and it is easy to install and popularize. , Which can explain that line attendants improve the efficiency of optical fiber line troubleshooting and machine room remediation, which is conducive to strengthening the maintenance and management of each routing port in the machine room.

Since the photosensitive element 300 or the light guide post 204 can be selectively inserted into the window 101 to receive the overflow light, this method is easy to industrially produce and assemble. In the application site of the computer room, the fixed block containing the light guide post can be directly replaced with a fixed groove The fixed block, thus realizing the direct upgrade of the search method: that is, the manual search method of optical fiber connection point leakage can be upgraded to the intelligent photosensitive element automatic routing search method, without the need to replace the entire optical fiber coupler, and there is no need to disconnect the optical fiber Link, saving upgrade costs and time, has a huge market prospects.

Referring to Figures 11-14, this is the third embodiment of the present invention. This embodiment is based on Embodiment 2, but is different from Embodiment 2 in that the optical coupler is a coupler that can be assembled, and it also includes a The sliding element 400 can be assembled into the housing 100 to realize the packaging of the ceramic sleeve.

Specifically, the two ends of the housing 100 are respectively a first connection end 103 and a second connection end 104. Both the first connection end 103 and the second connection end 104 are ports that are compatible with SC fiber optic connectors, and the SC fiber optic connector can be directly inserted into the port. Preferably, the first connection end 103 and the second connection end 104 are the same as the two ends of the existing SC fiber coupler housing. The SC optical fiber connectors inserted at both ends of the housing 100 can be connected at an intermediate position in the housing 100.

A fixing plate 105 is vertically arranged inside the housing 100, that is, the fixing plate 105 is perpendicular to the insertion direction of the SC optical fiber connector. According to the present invention, the inner surface of the fixing plate 105 is a first surface A, and the outer surface is a second surface B, and the first surface A is directly opposite to the first connecting surface. The connecting end 103 and the second surface B are directly opposite to the second connecting end 104. Wherein, the first surface A is located exactly in the middle of the housing 100, and its plane passes through the central axis of the window 101, and the second surface B is located inside the cavity of the second connecting end 104. A second limiting sleeve 105a facing the outer port of the second connecting end 104 is vertically fixed on the second surface B.

The second limiting sleeve 105 a is a longitudinal hollow sleeve with a longitudinal channel with a circular cross section inside, and the channel penetrates the fixing plate 105.

The sliding element 400 is inserted from the first connecting end 103 as a whole, and includes a sliding block 401 capable of longitudinally sliding inside the first connecting end 103. The outline of the outer edge of the slider 401 is matched with the inner side wall of the first connecting end 103, and the slider 401 can also be in contact with the first surface A of the fixing plate 105 to achieve docking and fixing.

The present invention sets that the inner side surface of the slider 401 is a third surface C, and the outer side surface is a fourth surface D. Wherein, the third surface C faces inward and is used to abut the first surface A of the fixing plate 105; the fourth surface D faces outward, and a first surface symmetrical to the second limiting sleeve 105a is fixed on the fourth surface D. The limiting sleeve 402, the first limiting sleeve 402 and the second limiting element sleeve 105a have the same structure, and will not be repeated here.

A pair of first pulling hooks 403 are symmetrically provided on both lateral sides of the first limiting sleeve 402. After the sliding element 400 is fixed inside the housing 100, the first pulling hooks 403 can carry out the operation of the SC optical fiber connector inserted from the first connecting end 103. Therefore, the structure of the first pull hook 403 is matched with the two side structures of the existing SC optical fiber connector. In addition, a pair of second pull hooks 404 symmetrical to the first pull hook 403 are fixed on the third surface C, and the two structures are similar. Similarly, the second hook 404 can be inserted into the second connection end 104 from the first connection end 103, and can fix the SC fiber connector inserted from the second connection end 104. Therefore, the lateral sides of the fixing plate 105 There are two through holes 105b corresponding to the second hook 404.

When the slider 401 is in contact with the fixing plate 105 and is connected, the second hook 404 passes through the corresponding opening 105b, extends into the cavity of the second connecting end 104, and points toward the outer port of the second connecting end 104; and A hook 403 is located inside the cavity of the first connection end 103 and points toward the outer port of the first connection end 103. At the same time, the butting of the sliding block 401 and the fixed plate 105 can make the internal passages of the first limiting sleeve 402 and the second limiting sleeve 105a face each other and communicate with each other, forming a combined channel T.

The light-trapping coupler of the present invention further includes a ceramic sleeve 500. The ceramic sleeve 500 may be encapsulated in the combined channel T formed by the butting of the first limiting sleeve 402 and the second limiting sleeve 105a, and the outer diameter of the ceramic sleeve 500 is matched with the inner diameter of the combined channel T.

In order to prevent unnecessary longitudinal displacement of the ceramic sleeve 500 in the combined channel T, and even slip out of the outer port of the first limit sleeve 402 or the second limit sleeve 105a, the present invention sets: the first limit sleeve 402 and the first limit sleeve 402 and the second limit sleeve 105a The outer ports of the two limiting sleeves 105a are respectively provided with a first limiting ring 402a and a second limiting ring 105a-1, both of which are ring structures.

The inner diameter of the first limit ring 402a is smaller than the inner diameter of the first limit sleeve 402, and the inner diameter of the second limit ring 105a-1 is smaller than the inner diameter of the second limit sleeve 105a. A limit ring 402a and a second limit ring 105a-1 form limits at both ends of the ceramic sleeve 500 to prevent it from slipping out.

In practice, the SC fiber optic connectors inserted at both ends of the coupler housing 100 can squeeze each other during coupling (caused by the compression of the spring in the SC fiber optic connector), but the first hook 403 and the second hook 404 Can maintain close butt under restraint. According to the reaction of the force, the SC fiber optic connectors at both ends also have a tendency to push each other and pull the first hook 403 and the second hook 404, but since the first hook 403 and the second hook 404 are both fixed on the slider 401, It has an integrated structure, and the housing 100 of the coupler is also an integrated structure. Therefore, there is no problem of the coupler or the internal structure being pulled and cracked. At the same time, the split connection of the housing 100 and the sliding element 400 facilitates the packaging of the ceramic sleeve 500. One end of the ceramic sleeve 500 can be inserted into the second limiting sleeve 105a, and then the sliding element 400 can be slid into the second limit sleeve 105a of the housing 100. Inside a connecting end 103, the other end of the ceramic sleeve 500 can be inserted into the first limiting sleeve 402, and finally the process of encapsulating the ceramic sleeve 500 in the combined channel T is realized.

According to the second embodiment, since the light extraction part is installed in the window 101 of the light extraction coupler, and the lower end of the light extraction part can extend to the inside of the housing 100 to receive the overflow light, it is necessary to ensure that the slider 401 and the fixing plate 105 During the docking, the installation and setting of the light extraction components are not blocked. In the present invention, the slider 401 and the fixed plate 105 are provided with corresponding semi-cylindrical channels 405, and after the two are docked, the semi-cylindrical channels 405 of the two can be formed. The accommodating channel facing the window 101, the accommodating channel communicates with the combined channel T, and The lower end of the optical component can be inserted into the accommodating channel.

Correspondingly, the ceramic sleeve 500 has a longitudinal slit 501 facing the accommodating channel. Therefore, after the light-trapping component passes through the window 101 and the accommodating channel from top to bottom, it can face the ceramic sleeve. At the slit 501 of the tube 500. If the two ends of the housing 100 are respectively plugged with SC fiber connectors, the ferrules of the two SC fiber connectors can be inserted into the ceramic sleeve 500 from both ends of the ceramic sleeve 500, and are at the middle position of the ceramic sleeve 500. Butting, and the butting surface of the ferrule can be exposed to the receiving channel and the window 101 through the slit 501. Therefore, the overflow light leaking from the butting surface of the ceramic ferrule can pass through the slit 501 and be received by the light-trapping component facing the butting surface.

In addition, the present invention realizes the docking and fixing of the slider 401 and the fixing plate 105 through the assemblable housing 100 and the sliding element 400, so as to form an accommodation channel for accommodating the light extraction component. The advantage of this arrangement is: The semi-cylindrical channel 405 on the plate 105 is an integral structure with the housing 100. Therefore, after the light extraction component is installed in the window 101, the semi-cylindrical channel 405 on the fixed plate 105 can limit the light extraction component in this direction. Even if the sliding element 400 is inserted into the first connecting end 103 or the SC optical fiber connector is inserted, the fixed plate 105 will not be displaced. Therefore, it is ensured that the light extraction component attached to it will not be displaced and deviated. To improve the measurement accuracy of its work. In addition, even if the sliding element 400 is forced to move, it will not pull the light extraction component, which ensures the detection accuracy of the light extraction component and ensures the reliability and stability of the installation of the light extraction component.

15 to 18, it is the fourth embodiment of the present invention. This embodiment is based on the previous embodiment, but the difference is that this embodiment solves the problem of fixing the slider 401 and the fixing plate 105 after butting.

Specifically, two first hooks 401c facing in the direction of the fourth surface D are provided on the lateral sides of the slider 401 (the edges transversely perpendicular to the inner side wall of the housing 100), and the first hooks 401c correspond to the first hooks 401c. There is a slope on one side in the direction of the three faces C, and the slope has a tendency to gradually bulge from the third face C to the fourth face D, and forms a step-like or cliff-like shape at the highest point of the bulge (This surface is a step surface or a cliff surface), which forms the first hook 401c of the present invention. In addition, the inner side wall of the housing 100 is provided with two first mating hooks 106 that are fitted to the first hooks 401c. The slope of the first mating hooks 106 is opposite to that of the first hooks 401c. It can be the same. Preferably, the first hook 401c is in the shape of an inclined strip, which has a certain lateral elastic deformation capability.

When assembling, when the sliding element 400 is inserted into the housing 100, the slope of the first hook 401c and the slope of the first mating hook 106 contact and squeeze each other. If you continue to push, the first hook 401c becomes lateral. Bending elastic deformation. Subsequently, when the slider 401 slides inward to "the step surface (or the cliff surface) of the first hook 401c and the first mating hook 106 contact with each other", the sliding element 400 can pass through the first hook 401c and the first hook 401c. A mating hook 106 is buckled with each other to achieve fixed installation, and at this time, the fixing plate 105 is butted with the slider 401 to form a tight fixation and combination. At the same time, the first limit sleeve 402 and the second limit sleeve The internal passages of 105a are facing and communicating with each other at this time, forming a combined passage T.

Further, the third surface C of the slider 401 is recessed with a groove 401a that fits with the fixing plate 105, so that two protrusions 401b can be formed on both sides of the groove 401a, and the inner frame of the through hole 105b fits with The structure of the protrusion 401b. Therefore, when the fixing plate 105 is abutted with the slider 401, the fixing plate 105 can be inserted into the groove 401a, and the protrusions 401b on both sides of the groove 401a can also be inserted into the corresponding opening 105b to form a complementary fit. The above-mentioned first hook 401c can be arranged on the outer surface of the protrusion 401b, and when the fixing plate 105 is embedded in the groove 401a, the first hook 401c and the first mating hook 106 are buckled with each other to realize the slider 401 is fixed and combined with the fixed plate 105 after docking.

In this embodiment, the interlocking of the first hook 401c and the first mating hook 106 makes the SC fiber connector inserted from the second connection end 104 not squeeze during the process of inserting the SC fiber connector. The SC fiber connector of the first connecting end 103 has been inserted, so that the sliding element 400 is separated from the housing 100.

However, if only a pair of first hooks 401c for buckling with the first mating hooks 106 are provided on the outer surface of the protrusion 401b, then the sliding element 400 may be unstable due to uneven lateral force distribution. sex. At the same time, it is often difficult to counteract the thrust of the SC fiber connector from the second connecting end 104 by only the first hook 401c. Therefore, the present invention is provided with two second hooks 401d on the inner surface of the protrusion 401b. Two second hooks 401d are provided on both sides of the fixing plate 105. Two mating hooks 105c, at this time, the inner surface of the protrusion 401b and the two sides of the fixing plate 105 are kept at a distance to allow the space for the second hook 401d and the second mating hook 105c. The orientation of the second hook 401d is the same as that of the first hook 401c, and the two are just distributed on both sides of the protrusion 401b. The second mating hook 105c may have the same structure as the second hook 401d, but the orientation is opposite, which will not be repeated here (refer to the snap fit between the first hook 401c and the first mating hook 106).

Further, the fixing plate 105 is symmetrically provided with two hollow structures 105d corresponding to the second mating hooks 105c in the lateral direction. Each hollow structure 105d is located at the inner position of the corresponding second mating hook 105c, and is separated from it by a certain width. Therefore, this makes the outer frame of the hollow structure 105d form two vertical strip elastic ribs 105e, and the second matching hook 105e 105c is located on the outer edge of the strip elastic rib 105e. The strip elastic rib 105e has a certain lateral elastic deformation ability. Therefore, when the sliding element 400 is inserted into the housing 100, the second hook 401d can squeeze the slope of the second mating hook 105c, and make the strip shape The elastic rib 105e is deformed laterally. When the second hook 401d slides over the second mating hook 105c and forms a buckle, the strip-shaped elastic rib 105e can be elastically reset and form a limit for the second hook 401d.

According to the present invention, when the fixing plate 105 is embedded in the groove 401a, the first hook 401c can be buckled with the first mating hook 106, and the second hook 401d can also be mated with the second mating hook 105c. The buckling, that is, the buckling connection on both sides of the protrusion 401b occurs at the same time.

From the above, it can be seen that since the first surface A is located exactly in the middle position of the housing 100, the butt joint between the slider 401 and the fixed plate 105 is located in the middle position of the housing 100.

In the present invention, one end of the ceramic sleeve 500 can be inserted into the second limiting sleeve 105a first, and then the sliding element 400 is inserted into the housing 100 from the first connecting end 103, so that the slider 401 and the fixed plate 105 are butted, and finally passed The mutual buckling of the first hook 401c and the first mating hook 106 and the buckling of the second hook 401d and the second mating hook 105c with each other encapsulate the ceramic sleeve 500 in the combined channel T.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out. Modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present invention should be covered by the scope of the claims of the present invention.

10: Light extraction parts

100: shell

101: Windows

102: Snap hook

200: fixed block

201: gusset

Claims (19)

A light-trapping coupler, comprising: a housing with a transparent window on the periphery of which is distributed with centrally symmetrical first fixing parts; and a fixing block, the side of which is provided with corresponding to the first fixing parts A second fixing piece of a fixing piece, the fixing block is respectively connected to the corresponding first fixing pieces through the second fixing pieces on its side, the fixing block is made of light-transmitting material, and its lower surface has a downward convex The light guide rod is inserted downwardly into the window and extends to the inside of the housing. The optical coupler according to claim 1, wherein the first fixing parts are a plurality of snap hooks, the second fixing parts are a plurality of gussets, and the fixing blocks are respectively connected to the corresponding gussets through the gussets Wait for the snap hooks to snap to each other. The light-trapping coupler according to claim 2, wherein each of the hooks includes a post fixed on the outer surface of the housing and a hook head fixed on the top of the post. The light-trapping coupler according to claim 3, wherein the lower surface of the hook head has a first barb facing inward, and the upper surface of each buckle plate has a second barb corresponding to the first barb. Barb, the second barb and the first barb have the same structure and complement each other. The light-trapping coupler according to claim 4, wherein when the buckle plates are twisted into the engaging hooks, the first barb and the second barb are entangled with each other, and the lower surface of the buckle plates In contact with the outer surface of the shell, an outer end surface of the second barb is attached to the inner surface of the upright column. The optical coupler according to any one of claims 1 to 5, wherein the window of the At least two centrally symmetrical first fixing parts are distributed around the periphery, and second fixing parts corresponding to the first fixing parts one-to-one are arranged on the side of the fixing block. The light-trapping coupler according to any one of claims 3 to 5, wherein each hook head symmetrical in the center may be oriented counterclockwise or clockwise. The light-taking coupler according to any one of claims 1 to 5, wherein a photosensitive element is provided on the lower surface of the fixing block, and the photosensitive element is inserted downward into the window and extends into the housing. The light-trapping coupler according to claim 1, wherein the lower end surface of the light guide rod is a spherical light-collecting surface. The light-taking coupler according to claim 1, wherein the upper surface of the fixing block has a spherical protrusion facing the light guide rod. The optical coupler according to any one of claims 1 to 5, wherein the two ends of the housing are respectively a first connection end and a second connection end that are adapted to the SC optical fiber connector, and are internally arranged There is a fixing plate perpendicular to the insertion direction of the SC optical fiber connector, a second limiting sleeve is fixed on the outer surface of the fixing plate, and the plane of the inner side of the fixing plate passes through the central axis of the window. The optical coupler according to claim 11, further comprising a sliding element, the sliding element comprising a sliding block capable of longitudinally sliding inside the first connecting end, and an outer surface of the sliding block is fixed with the first A first limit sleeve with two limit sleeves symmetrical and a pair of first pull hooks located on both sides of the first limit sleeve, a pair of second pull hooks symmetrical to the first pull hooks are fixed on the inner side of the slider , The fixed plate has two Corresponding to the openings of the second hooks. The light-trapping coupler according to claim 12, wherein when the slider is in contact with the fixing plate, the second pull hooks pass through the through openings and point in the direction of the second connecting end, and the first pull hooks Point to the direction of the first connection end. The light-trapping coupler according to claim 12, wherein two first hooks are provided on both lateral edges of the slider, and two first hooks are provided on the inner side wall of the housing. The first mating hook of the hook, the fixing plate is butted with the sliding block, and the first hooks and the first mating hooks are buckled with each other, so that the first limit sleeve and the second limiter The internal passages of the bit sleeves face each other and communicate to form a combined passage. The optical coupler according to claim 14, wherein the inner side surface of the slider has a groove that fits the fixing plate, so that two protrusions are formed on both sides of the groove, and the holes are matched In these bumps. The optical coupler according to claim 15, wherein two second hooks are provided on the inner sides of the protrusions, and two second hooks are provided on both sides of the fixing plate. The second mating hooks of the hooks, when the fixing plate is embedded in the groove, the second hooks and the second mating hooks are buckled with each other. The light-trapping coupler according to claim 16, wherein the fixing plate is symmetrically provided with two hollow structures corresponding to the second mating hooks in the lateral direction, so that the outer frames of the hollow structures form two strips -Shaped elastic ribs, the second matching hooks are located on the outer edges of the strip-shaped elastic ribs. The optical coupler according to claim 14, wherein the slider and the solid The fixed plate has semi-cylindrical channels corresponding to each other, and after the two are butted, the semi-cylindrical channels of the two can form an accommodation channel facing the window, and the accommodation channel is in communication with the combined channel. The light-trapping coupler according to claim 12, further comprising a ceramic sleeve, two ends of the ceramic sleeve are respectively inserted into the first limit sleeve and the second limit sleeve.

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