CN101710197B - Optical connector and assembly thereof - Google Patents

Abstract

The invention relates to an optical connector and its components. The optical connector and the contacts of the first and second connectors of the connector component include a flange, and a shaft is arranged on the outer peripheral surface of the flange near the front end. A thin neck structure is arranged on the outer peripheral surface near the rear end surface, and an elastic sleeve is set on the thin neck structure. The outer peripheral surface before the thin neck structure of the disc is slidingly supported, and the end of the central hole of the elastic sleeve has a radial elastic contraction structure. The stepped hole section is matched with the outer peripheral surface of the thin neck structure. Two parallel planes are arranged on the peripheral surface of the retaining ring, and the rear end surface of the retaining ring is engaged with the corresponding structure of the optical connector housing. The contact piece of the optical connector of the present invention replaces the front sleeve in the prior art with an elastic sleeve, which reduces the radial size of the contact piece, thereby reducing the radial size of the front end of the optical connector.

Description

Optical connectors and their components

technical field

The invention relates to an optical connector, and at the same time, the invention also relates to a connector component of the optical connector, which belongs to the field of optical signal transmission.

Background technique

As shown in Figure 1, the current optical connector includes a connector housing 21. There is a stepped hole corresponding to the optical fiber contact in the housing 21. An optical fiber contact 61 is arranged in the stepped hole. The front sleeve of the optical fiber contact 61 The front end surface of 100 matches the stepped surface of the stepped hole of the housing 21, and the rear sleeve 200 of the optical fiber contact piece 61 is provided with a collar, and the rear end surface of the collar is connected with the front end of a pressure plate 41 fixedly arranged on the housing 21. The surface matches, thereby fixing the optical fiber contact piece 61 in the housing 21. The optical fiber contact piece of the optical connector shown in Figure 1 is the rear sleeve fixed optical cable connector contact piece disclosed in the Chinese patent specification with application number 200720003373.X, including pins, pin tail handles, front sleeves, springs and The back cover, wherein the pin and the pin tail handle are fixedly connected and assembled together in the stepped inner hole of the front cover. The inner hole segment with smaller diameter at the front end fits and protrudes from its inner hole. The rear cover is fixedly installed on the rear end of the front cover, and the buckle structure at the front end of the back cover is fixedly matched with the corresponding buckle structure on the inner hole peripheral surface of the elastic retractable structure of the rear section of the front cover, and the spring is set on the small diameter of the tail end of the pin tail handle. On the peripheral surface, the front end is mounted on the stepped surface of the pin tail handle, the rear end is mounted on the front end of the back cover, and the rear end surface of the pin tail handle does not contact the front end of the back cover. The optical cable is fixed on the rear end of the back cover through the heat shrinkable tube, the optical fiber passes through the hole on the back cover and is connected to the pin, the pin tail handle and the back cover are elastically connected by a spring, when the plug and socket of the optical connector are mated, the plug and socket contact The pins of the parts are elastically contacted and stressed, and the contact parts and the tail handles of the pins overcome the spring force and retreat after being stressed, so as to realize the reliable insertion of the optical connector. This invention is simple in structure, easy to process, and reliable in mating. However, since the front cover is arranged on the outside of the contact piece, and the spring is arranged in the front cover, the radial dimension of the contact piece is relatively large, resulting in the radial dimension of the front end of the optical connector. It is too large to meet the miniaturization requirements of optical communication equipment; in addition, the rear cover of the invention is fixed on the elastic retractable structure of the rear section of the front cover through the buckle structure between it and the front cover. Elastic retraction performance, so the fixing stability between the front cover and the rear cover is poor, resulting in poor integrity of the contact parts.

Contents of the invention

The purpose of the present invention is to provide an optical connector to solve the problem in the prior art that the radial dimension of the front end of the optical connector is relatively large due to the front sleeve provided on the outside of the contact piece; at the same time, the purpose of the present invention is to provide a A connector assembly.

In order to achieve the above object, the present invention adopts the following technical solution: an optical connector, including a housing, a stepped hole for setting a contact piece inside the casing, a contact piece is arranged in the stepped hole, and the contact piece includes a flange , the flange has an installation passage extending from the front end to the rear end, the front end of the installation passage is fixedly provided with pins, the outer peripheral surface of the flange near the front end is provided with a collar, and the outer peripheral surface near the rear end There is a thin neck structure, the thin neck structure is fitted with an elastic sleeve, and a spring is fitted between the elastic sleeve and the collar of the flange, and the spring is installed between the flange collar and the corresponding end surface of the elastic sleeve , the front section of the central hole of the elastic sleeve is slidingly supported and matched with the outer peripheral surface before the thin neck structure of the flange, and the tail of the central hole of the elastic sleeve has a radially elastic shrinkage structure and a narrow neck structure. The outer peripheral surface of the elastic sleeve is provided with a retaining ring, the rear end surface of the retaining ring is engaged with the corresponding structure on the housing, and two parallel planes are arranged on the peripheral surface of the retaining ring.

The corresponding structure on the housing is a pressing plate fixed on the housing by screws, and the front end of the pressing plate matches the rear end of the retaining ring.

The radial elastic retractable structure is an elastic claw divided into elastic claws at the rear end of the elastic sleeve, which are uniformly arranged along the outer peripheral surface of the rear end of the elastic sleeve and extended to the rear end surface through axial through grooves.

A sleeve is sleeved on the pin, and the rear end face of the sleeve fits with the front end face of the flange.

A shaft sleeve for protecting the sleeve is sleeved on the outer peripheral surface of the sleeve.

The technical scheme of the optical connector assembly of the present invention is as follows:

An optical connector assembly, including a first optical connector and a second optical connector, the first optical connector includes a first optical connector housing, and the second optical connector includes a second optical connector housing , both the first and second optical connector housings have stepped holes for setting contacts, and the stepped holes of the first and second optical connector housings are respectively provided with contacts of the first and second optical connectors, so The contact piece of any one of the first connector and the second connector includes a flange, and the flange has an installation channel extending from the front end to the rear end, and the front end of the installation channel is fixedly provided with pins. A collar is arranged on the outer peripheral surface of the blue plate near the front end, and a thin neck structure is arranged on the outer peripheral surface near the rear end face. The thin neck structure is fitted with an elastic sleeve, which is fitted between the elastic sleeve and the collar of the flange. There is a spring, the spring top is installed between the flange collar and the corresponding end surface of the elastic sleeve, the front section of the central hole of the elastic sleeve is slidingly supported with the outer peripheral surface before the thin neck structure of the flange, and the elastic sleeve The tail of the center hole has a radially elastic retractable stepped hole section that fits with the outer peripheral surface of the thin neck structure. A retaining ring is arranged on the outer wall of the elastic sleeve, and the rear end face of the retaining ring matches the corresponding first or second The corresponding structures on the housings of the two optical connectors stop and fit, and two parallel planes are arranged on the peripheral surface of the stop ring.

The corresponding structure on the housing of the first or second optical connector is a pressure plate fixed on the housing by screws, and the front end surface of the pressure plate matches the rear end surface of the retaining ring.

The radial elastic retractable structure is an elastic claw divided into elastic claws at the rear end of the elastic sleeve, which are uniformly arranged along the outer peripheral surface of the rear end of the elastic sleeve and extended to the rear end surface through axial through grooves.

A sleeve is sleeved on the contact pin of the second connector, and the rear end face of the sleeve fits with the front end face of the flange.

A shaft sleeve for protecting the sleeve is sleeved on the outer peripheral surface of the sleeve of the contact piece of the second connector.

The front ends of the springs of the first and second connectors of the optical connector of the present invention and its components are mounted on the collar of the flange, and the rear ends are mounted on the front end of the elastic sleeve, and the flange directly Maintain the stability of the spring, replace the front sleeve in the prior art with the elastic sleeve, reduce the radial size of the contact piece, thereby reducing the radial size of the front end of the optical connector, in addition, the elastic sleeve stop ring of the present invention There are two parallel planes on the peripheral surface, which reduces the radial size of the contact. If the optical connector has multiple contacts, when the contacts are installed side by side in the housing, the planes on the adjacent retaining rings Two-by-two mating can reduce the overall size of the optical connector. Furthermore, since the spring of the contact piece of the present invention is set on the outer peripheral surface of the flange, the flange can maintain the stability of the spring, and the spring will not be unstable when the elastic sleeve is installed, and the installation is easier. The assembly efficiency of the device is high.

Description of drawings

Fig. 1 is a cross-sectional view of an existing optical connector;

2 is a cross-sectional view of a schematic structural view of Embodiment 1 of the optical connector of the present invention;

Fig. 3 is the left side view (excluding dust cover) of Fig. 2;

Fig. 4 is a cross-sectional view of the optical connector contact in Fig. 2;

Fig. 5 is a sectional view of the flange in Fig. 4;

Fig. 6 is a sectional view of the elastic sleeve in Fig. 4;

Fig. 7 is the right view of Fig. 6;

8 is a cross-sectional view of a schematic structural view of Embodiment 2 of the optical connector of the present invention;

Fig. 9 is the left side view (excluding dust cover) of Fig. 8;

FIG. 10 is a cross-sectional view of the contact of the optical connector in FIG. 8 .

Detailed ways

Example 1:

In Figures 2 and 3, an optical connector includes a housing 21, and a stepped hole corresponding to a contact 61 is provided in the housing 21, and a contact 61 is provided in the stepped hole, and the contact 61 includes a front end. A flange with pins and a set of elastic sleeves set on the peripheral surface of the flange, the front end of the flange is matched with the corresponding step surface of the stepped hole where the contact piece 61 is set on the housing 21, and the front end of the elastic sleeve is useful In the retaining ring fixed with the housing 21. The tail end of the housing 21 is fixed with a sleeve 71 through the connecting nut 81, and the sleeve 71 realizes anti-rotation with the housing 21 through the anti-rotation pin 91. The rear end surface of the retaining ring 61 cooperates to form a retaining structure, thereby fixing the contact member 61 in the housing 21 . The rear end of the flange of the contact piece 61 is provided with a shaft section for fixing the optical cable 8. The shaft section is a shaft provided with more than one ring groove. Firmly, the aramid fiber outside the section of optical fiber inserted into the flange is press-fitted and fixed on the shaft section for fixing the optical cable at the rear end of the flange through the crimping sleeve, thereby realizing the fixing of the optical cable 8 on the contact piece 61 . The outer protective layer of the optical cable is crimped on the tail end of the sleeve 71 through the heat shrinkable tube 101 . The front end of the optical connector is provided with a dust cover 111, and the dust cover 111 can prevent dust from entering the optical connector during storage and transportation. The contact piece of this embodiment is fixedly installed in the housing through the front end surface of its flange and the rear end surface of its elastic sleeve retaining ring, then the compression error of the spring is related to the processing error of the flange plate and the elastic sleeve, eliminating The front cover in the prior art is improved so as to avoid the error of the compression amount of the spring caused by the processing error of the front cover.

In Fig. 4, Fig. 5, Fig. 6, and Fig. 7, the contact piece corresponding to the optical connector in Fig. 2 and Fig. 3 above includes a flange 4, and the front end of the mounting channel of the flange 4 is provided with a pin 3, There is an interference fit between the pin 3 and the installation channel. The rear end surface of the flange 4 is provided with an inlet for inserting an optical fiber. The optical fiber in the optical cable 8 enters the pin 3 through the installation channel of the flange from the optical fiber inlet. In the central hole of the flange 4, the connection with the pin 3 is realized. The part of the installation channel on the flange 4 where the pin 3 is installed is larger than the part leading to the optical fiber. The two form a stepped surface at the joint, and the end face of the pin 3 and The stepped surface cooperates, and the position of the stepped surface determines the depth at which the pin 3 is inserted into the mounting channel of the flange. The outer peripheral surface of the flange 4 is elastically assembled with an elastic sleeve 6 through a spring 5 set on the outer peripheral surface of the flange. The front end of the spring 5 is stuck on the shoulder of the collar at the front end of the flange 4. The rear end is used to push the front end of the elastic sleeve 6 . The position where the elastic sleeve 6 is installed on the outer peripheral surface of the flange 4 is a thin neck structure 9, and the rear end surface 14 of the elastic sleeve 6 is in contact with the back step of the thin neck structure 9 when the contact piece is not installed in the optical connector housing. Face 10 cooperates to maintain the integrity of the contact. The central hole of the elastic sleeve 6 is a stepped hole with a large radius and a small rear. The diameter of the wide mouth section of the central hole of the elastic sleeve 6 is equal to the diameter of the outer peripheral surface of the flange 6. The necking section of the central hole of the elastic sleeve 6 is the same as The outer peripheral surface of the thin neck structure 9 cooperates, and the wide mouth section of the central hole of the elastic sleeve 6 cooperates with the sliding support of the outer peripheral surface of the flange plate 4 before the thin neck structure 9, and the stepped surface of the central hole of the elastic sleeve 6 and the thin neck structure 9 The front step surface of is a limit fit. The front end of the elastic sleeve 6 is provided with a stop ring 11 , and the rear end surface of the stop ring 11 is used to stop and cooperate with the pressure plate of the sleeve 71 after the contact piece is installed in the optical connector housing. Two mutually parallel planes 16 are provided on the outer peripheral surface of the retaining ring 11 , and the machining of planes on the outer peripheral surface of the retaining ring 11 can reduce the radial dimension of the contact piece, thereby reducing the radial dimension of the connector. The rear end of the elastic sleeve 6 is uniformly provided with four axial through grooves 12 extending to the rear end surface along the outer peripheral surface, and divides the rear end of the elastic sleeve 6 into four symmetrical elastic claws 13 . Elastic claw 13 makes the rear end of elastic sleeve 6 have elasticity, when elastic sleeve 6 is installed on the flange plate 4 from the rear end of flange plate 4, because the diameter of the necking section of the center hole of elastic sleeve 6 is as small as the law The diameter of the outer peripheral surface of the flange plate 4, the elastic claw 13 will be opened during installation, and when the elastic sleeve 6 moves forward to the thin neck structure 9 of the flange plate 4, the elastic claw 13 will return to its original state. In front of the device housing, the rear end surface 14 of the elastic sleeve 6 cooperates with the rear step surface 10 of the thin neck structure 9 to maintain the stability of the contact piece.

In this embodiment, the optical cable is directly crimped on the end section at the end of the flange. When the number of contacts is less than one or two, the optical cable can also be crimped on the optical connector housing. On the structure, in order to better protect the optical cable.

Example 2

In Fig. 8 and Fig. 9, the optical connector includes a housing 312, which has a stepped hole corresponding to the optical fiber contact 412, and the optical fiber contact 412 is arranged in the stepped hole, and the contact 412 includes a front end. The flange of the pin and an elastic sleeve arranged on the peripheral surface of the flange, the front end of the elastic sleeve is provided with a retaining ring for fixing with the optical connector housing, the outer peripheral surface of the pin is sleeved with a sleeve, the sleeve A shaft sleeve for protecting the sleeve is arranged on the outer peripheral surface of the pipe. The front end face of the sleeve matches with the corresponding stepped face of the stepped hole of the optical connector housing 312, and the rear end face of the stop ring of the elastic sleeve cooperates with the front end face of the pressure plate 102, thereby realizing the positioning of the contact piece 412 in the housing 312, The pressure plate 102 is fixed on the housing 312 by screws, the outer peripheral surface of the tail end of the housing 312 is screwed with a sleeve 112, and the inner cavity of the rear end of the sleeve 112 is provided with a crimping sleeve 132 fixed on the sleeve 112. The sleeve 132 and the inner sleeve 122 disposed in its inner hole fix the aramid fiber outside the optical fiber. The tail end of the sleeve 112 is fixed with a sheath 162 provided on the outer peripheral surface of the optical cable 172 to protect the optical cable through a nut 142 . The front end of the optical connector housing is provided with a connection nut 612 for connecting and fixing the adapter connector, and a dust cover is provided in the gap between the connection nut 612 and the housing 312, and the dust cover is used for connecting the connector Prevent dust from entering the connector during transportation and storage.

In Fig. 10, the difference between the contact piece of this embodiment and the contact piece of Example 1 is that: a sleeve 221 is set on the contact pin of the optical connector contact, and the rear end surface of the sleeve 221 is in contact with the contact piece of the optical connector. The front end of the flange 421 is matched, and the outer peripheral surface of the sleeve 221 is provided with the sleeve 121 of the protective sleeve 221, and the front end of the contact is positioned by the front end of the sleeve 221 and the optical connector housing 312; optical connection The rear end of the flange plate of the connector contact is not provided with a structure of aramid fiber for pressing the optical fiber, and the aramid fiber is pressed on the housing of the optical connector.

The first connector of the optical connector assembly of the present invention is the connector in the first embodiment above, and the second connector of the optical connector assembly is the connector in the second embodiment above.

The radial elastic retractable structure of the elastic sleeve in the above embodiments of the present invention is an elastic claw, or it may be a C-shaped sleeve with a radial retractable function. There are four elastic claws in the embodiment of the present invention, and there may also be two, three, five or six elastic claws.

Claims (10)

1. An optical connector, comprising a housing, with a stepped hole for setting a contact in the housing, and a contact is arranged in the stepped hole, characterized in that: the contact includes a flange, and the flange has An installation channel extending from the front end to the rear end, the front end of the installation channel is fixedly provided with pins, the outer peripheral surface of the flange near the front end is provided with a collar, and the outer peripheral surface near the rear end is provided with a thin neck structure, The thin neck structure is fitted with an elastic sleeve, and a spring is set between the elastic sleeve and the collar of the flange, and the spring is mounted between the flange collar and the corresponding end face of the elastic sleeve. The front section of the central hole is slidingly supported and matched with the outer peripheral surface before the thin neck structure of the flange, and the tail of the central hole of the elastic sleeve has a radially elastic retractable stepped hole section that cooperates with the outer peripheral surface of the thin neck structure. A retaining ring is arranged on the outer wall of the elastic sleeve, and the rear end surface of the retaining ring is engaged with the corresponding structure on the casing. Two parallel planes are arranged on the peripheral surface of the retaining ring. 2. The optical connector according to claim 1, characterized in that: the corresponding structure on the housing is a pressure plate fixed on the housing by screws, the front end of the pressure plate matches the rear end of the retaining ring . 3. The optical connector according to claim 1, characterized in that: the radial elastic retractable structure is an axial through groove at the rear end of the elastic sleeve that is uniformly arranged along the outer peripheral surface of the rear end of the elastic sleeve and extends to the rear end surface Split into elastic claws. 4 . The optical connector according to claim 1 , 2 or 3 , wherein a sleeve is sleeved on the contact pin, and the rear end surface of the sleeve fits with the front end surface of the flange. 5 . 5. The optical connector according to claim 4, characterized in that: a shaft sleeve of the protective sleeve is sleeved on the outer peripheral surface of the sleeve. 6. An optical connector assembly, comprising a first optical connector and a second optical connector, the first optical connector includes a first optical connector housing, and the second optical connector includes a second optical connector housing body, the first and second optical connector housings have stepped holes for setting contacts, the first and second optical connector housings are respectively provided with contacts of the first and second optical connectors in the stepped holes, It is characterized in that the contact piece of any one of the first connector and the second connector includes a flange, and the flange has an installation channel extending from the front end to the rear end, and the front end of the installation channel is fixedly arranged There are pins, a collar is arranged on the outer peripheral surface of the flange near the front end, and a thin neck structure is arranged on the outer peripheral surface near the rear end. The thin neck structure is fitted with an elastic sleeve, and the elastic sleeve is connected to the flange. There is a spring set between the collars, and the spring is installed between the collar of the flange and the corresponding end surface of the elastic sleeve. The front section of the central hole of the elastic sleeve is matched with the outer peripheral surface before the thin neck structure of the flange. , the tail of the central hole of the elastic sleeve has a radial elastic contraction structure with a narrowed stepped hole section to cooperate with the outer peripheral surface of the thin neck structure, and a retaining ring is arranged on the outer wall of the elastic sleeve, and the rear end surface of the retaining ring is connected to the outer wall of the elastic sleeve. The corresponding structures on the corresponding first or second optical connector housings are blocked and fitted, and two parallel planes are arranged on the peripheral surface of the blocking ring. 7. The optical connector assembly according to claim 6, wherein the corresponding structure on the first or second optical connector housing is a pressure plate fixed on the housing by screws, and the front end surface of the pressure plate Cooperate with the rear end face of the retaining ring. 8. The optical connector assembly according to claim 6, characterized in that: the radially elastic retractable structure is an axial through-hole at the rear end of the elastic sleeve that is uniformly arranged along the outer peripheral surface of the rear end of the elastic sleeve and extends to the rear end surface The slots are divided into elastic claws. 9. The optical connector assembly according to claim 6, 7 or 8, characterized in that: the pin of the second connector contact is covered with a sleeve, and the rear end surface of the sleeve is in contact with the flange The front face fits. 10 . The optical connector assembly according to claim 9 , wherein a sleeve of the protective sleeve is sleeved on an outer peripheral surface of the sleeve of the second connector contact. 11 .

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