BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to optical connectors, more particularly to optical connectors with a protecting mechanism to protect an optical module thereof from being covered by dust.

2. Description of Related Art

WO. Patent Publication No. 2008/121731 A1 discloses an optical connector designed with a plurality of optical fibers to increase signal transmission speed of a standard USB connector. The optical connector defines a mating port to receive a corresponding plug, and includes an insulative housing, a plurality of contacts retained in the housing to transmit electrical signals, and a plurality of optical fibers to transmit optical signals for increasing signal transmission speed. The housing has a tongue extending forwardly into the mating port. The tongue defines a plurality of slots at a lower side thereof. The contacts include contact portions catileveledly received in the slots. The optical fibers have light receiving elements located below the tongue and forwardly exposed into the mating port to mate with the plug. However, when the optical connector does not mate with the plug, the light receiving elements of the optical fibers are exposed to the exterior, which easily cause the light receiving elements being covered by dust, and then the optical connector can not transmit optical signals stably.

Hence, an improved optical connector is desired to overcome the above problems.

BRIEF SUMMARY OF THE INVENTION

According to one aspect of the present invention, an optical connector defining a receiving space for receiving a corresponding plug, comprises: an insulative housing having a front surface at a rear side of the receiving space; an optical module mounted to the insulative housing, the optical module having a light receiving element located behind the front surface and forwardly exposed to the receiving space; a protecting mechanism assembled in the receiving space, the protecting mechanism having a door lying in a vertical plane in front of the front surface to shield the light receiving element along an insertion direction when the plug is not inserted into the receiving space, and moving downwardly out of the receiving space to unveil said light receiving element in said insertion direction when the plug is inserted into the receiving space.

According to another aspect of the present invention, an optical connector comprises: a metal shell covering the insulative housing and forming a receiving space with the tongue; an optical module retained on the insulative housing and having a light receiving element located at one side of the tongue and forwardly exposed to the receiving space; and a protecting mechanism located at a front side of the light receiving element to protect the light receiving element from being covered by dust; wherein the protecting mechanism comprises a door covering the light receiving element and a slider engaging with the door and protruding into the receiving space upwardly, the slider can be pressed to rotate downwardly along a clockwise direction to drive the door moving downwardly out of the receiving space in an insertion process of a corresponding plug.

The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view of an optical connector according to the present invention;

FIG. 2 is a partly exploded view of the optical connector shown in FIG. 1;

FIG. 3 is an exploded view of the optical connector shown in FIG. 1;

FIG. 4 is a cross sectional view taken along line IV-IV of FIG. 1 showing an internal structure of the optical connector when a corresponding plug is not inserted into the optical connector;

FIG. 5 is a view similar to FIG. 4 showing an internal structure of the optical connector when the plug is inserted into the optical connector;

FIG. 6 is a perspective view of a protecting mechanism and an optical module of the optical connector; and

FIG. 7 is a perspective view of the protecting mechanism, the optical module and a plurality of contacts of the optical connector.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be obvious to those skilled in the art that the present invention may be practiced without such specific details. In other instances, well-known circuits have been shown in block diagram form in order not to obscure the present invention in unnecessary detail. For the most part, details concerning timing considerations and the like have been omitted inasmuch as such details are not necessary to obtain a complete understanding of the present invention and are within the skills of persons of ordinary skill in the relevant art.

Reference will be made to the drawing figures to describe the present invention in detail, wherein depicted elements are not necessarily shown to scale and wherein like or similar elements are designated by same or similar reference numeral through the several views and same or similar terminology.

Referring to FIGS. 1-7, an optical connector 100 for soldering to a circuit board (not shown) according to the present invention is disclosed. The optical connector 100 can mate with an USB 2.0 plug or an optical plug (not shown). The optical connector 100 comprises an insulative housing 1, a plurality of contacts 2 and an optical module 3 retained in the insulative housing 1, a protecting mechanism 4 assembled to the insulative housing 1 to protect the optical module 3, a metal shell 5 and a rear shell 6 covering the insulative housing 1. The optical connector 100 defines a receiving space 7 between the insulative housing 1 and the metal shell 5 for receiving the USB 2.0 plug or the optical plug.

Referring to FIGS. 2 and 3, the insulative housing 1 has a base portion 10 located at a rear side of the receiving space 7, a tongue 11 and a standoff 12 extending forwardly from upper and lower side of a front surface 101 of the base portion 10 respectively. The front surface 101 is located at a rear side of the receiving space 7 and forwardly faces to the receiving space 7. The tongue 11 extends to the receiving space 7. The standoff 12 is located below the receiving space 7. The standoff 12 defines a pair of first and second slots 103, 104 extending backwardly from a front wall 102 thereof, a mounting slot 105 located at a front side of the mating face 101, and a receiving cavity 106 below the mounting slot 105. The receiving cavity 106 is located at a rear end of the standoff 12 and extends through the standoff 12 along the vertical direction. The receiving cavity 106 the mounting slot 105 and the receiving space 7 communicate with each other along a vertical direction.

The base portion 10 defines an opening 107 extending therethrough along an insertion direction of the optical plug to receive the optical module 3. The opening 107 is located below the tongue 11 and neighbored with the receiving space 7 along the insertion direction. The tongue 11 defines a plurality of passageways 111 recessed from a lower surface thereof to receive the contacts 2.

The contacts 2 comprise a pair of differential signal contacts, a grounding contact and a power contact at two sides of the differential signal contacts which are similar to contacts of a standard USB 2.0 receptacle (not shown) and can transmit USB signals. Each contact 2 has a retaining portion 21 positioned in the base portion 10, a contact portion 22 extending forwardly from a front end of the retaining portion 21, and a tail portion 23 extending outwardly and downwardly from a rear end of the retaining portion 21. The contact portions 22 are cantileveldly received in the passageways 111 of the tongue 11 and can move along the vertical direction. An arrangement of the contacts portions 22 on the tongue 11 is same to that of the standard USB 2.0 receptacle (not shown), thereby the optical connector 100 can mate with the standard USB 2.0 plug.

The optical module 3 is retained in the opening 107 to increase signal transmission speed of the standard USB 2.0 receptacle. The optical module 3 has a body portion 31 retained at a rear side of the insulative housing 1 and a mating portion 32 extending forwardly into the opening 107 from a front side of the body portion 31. The mating portion 32 has a pair of positioning posts 35 extending forwardly into the receiving space 7 from two sides of a front end thereof, and a pair of light receiving elements 34 between the positioning posts 35 and forwardly exposed to the receiving space 7. The positioning posts 35 are used to mate with a pair of holes of the optical plug for assuring a stable connection between the optical connector 100 and the optical plug. The light receiving elements 34 does not extend forwardly beyond the front surface 101. The mating portion 32 is located below and behind the tongue 11 to make the contact portions 22 and mating portion 32 transmit signals in two parallel levels along the vertical direction. Of course, the mating portion 32 of the optical module 3 can be positioned at an upper, left or right side of the tongue 11.

Referring to FIGS. 3-7, the protecting mechanism 4 is retained on the insulative housing 1, and is arranged in front of the tail portions 23 along the insertion direction and located between the tail portions 23 along a transverse direction. The protecting mechanism 4 comprises a slider 41 retained in the insulative housing 1 and a door 42 engaging with the slider 41.

The slider 41 is made of metal material and has a pair of first and second coil portions 411, 412 at two sides thereof, a pair of first and second abutting sections 413, 414 extending forwardly from a front end of the first and second coil portions 411, 412 and a resisting portion 415 extending upwardly from a rear end of the first and second coil portions 411, 412. The resisting portion 415 presents as a reversed U-shape to resist a front side of the door 42, thereby the door 42 is sandwiched between the resisting portion 415 and the front surface 101 along the insertion direction. The first abutting section 413 has a first oblique portion 4133 obliquely protruding into the receiving space 7, a first positioning portion 416 horizontally extending backwardly from a front end of the first oblique portion 4133 to be positioned in the first slot 103, and a first connecting portion connecting the first oblique portion 4133 and the first coil portion 411 together. The first connecting portion in the present invention has a first level portion 4131 extending horizontally and forwardly from the first coil portion 413 and a first vertical portion 4132 extending upwardly from a front end of the first level portion 4131. The first oblique portion 4133 obliquely extends forwardly and downwardly from a top end of the first vertical portion 4132. Of course, the first connecting portion can be designed to be an inclined lever directly connecting the first oblique portion 4133 and the first coil portion 411 together along an inclined direction.

The second abutting section 414 has a structure same to that of the first abutting section 413, thereby the first and second abutting sections 413, 414 are symmetrically located at two sides of the slider 4. The second abutting section 414 has a second level portion 4141 extending horizontally and forwardly from the second coil portion 412, a second vertical portion 4142 extending upwardly from a front end of the second level portion 4141, a second oblique portion 4143 obliquely extending forwardly and downwardly from a top end of the second vertical portion 4142, and a second positioning portion 417 horizontally extending backwardly from a front end of the second oblique portion 4143 to be positioned in the second slot 104. The second level portion 4141 and the second vertical portion 4142 are formed as a second connecting portion connecting the second oblique portion 4143 and the second coil portion 412 together. Of course, the second connecting portion also can be designed to be an inclined lever directly connecting the second oblique portion 4143 and the second coil portion 412 together along an inclined direction.

The first and second oblique portions 4133, 4143 are located at a common inclined plane and protrude into the receiving space 7 to abut against the plug. The first and second positioning portions 416, 417 are parallel to the first and second level portions 4131, 4141 and spaced apart from the first and second level portions 4131, 4141 along both the insertion direction and the vertical direction. The first and second abutting sections 413, 414 lie in two vertical planes respectively which are all perpendicular to the front surface 101. The first abutting section 413 is parallel to the second abutting section 104. The first and second positioning portions 416, 417 are received in the first and second slots 103, 104 below the receiving space 7 respectively to position the slider 41 to the insulative housing 1, and prevent the whole slider 41 from moving downwardly when the USB 2.0 plug or the optical plug is inserted into the receiving space 7 and presses the oblique portions 4133, 4143 downwardly.

The door 42 has a shield portion 421 lying in a vertical plane to joint against the front surface 101 along the insertion direction and a pair of first and second pivots 422, 423 extending outwardly from two sides of a lower end of the shield portion 421. In assembly, ringing the first and second coil portion 411, 412 on the first and second pivots 422, 423 respectively; then assembling the whole of the protecting mechanism 4 to the insulative housing 1, the first and second coil portions 411, 412 and the first and second pivots 422,423 are received in the mounting slot 105 and can not move along both the insertion direction and a transverse direction of the insulative housing 1; the first and second positioning portions 416, 417 are received in the first and second slots 103, 104 and resist inner lower walls of the first and second slots 103, 104; the resisting portion 415 resists a front side of the shield portion 421 to make the shield portion 421 lie in a vertical plane and abut against the front surface 101 along the insertion direction, therefore, the light receiving element can be covered and protected from being covered by dust or destroyed by other thing; the first and second abutting sections 413, 414 protrude into the receiving space 7 and are located at a front side of the door 42.

The metal shell 5 has a pair of opposed top wall 51 and bottom wall 52, and a pair of opposed side walls 53, 54 which surround the tongue 11 and formed the receiving space 7 therebetween. The bottom wall 52 defines a cutout 521 at a rear middle side thereof, and a pair of slits 522 extending along the insertion direction to make the oblique portions 4133, 4143 extending therethrough to the receiving space 7. The slits 522 do not extend through the bottom wall 52 backwardly, thereby the vertical portions 4132, 4142 can be ward off by a rear inner wall of the slits 522 to prevent the whole slider 41 from moving backwardly. The top wall 51, bottom wall 52 and side walls 53, 54 each has at least a spring arm 55 extending forwardly into the receiving space 7 to resist or lock with the corresponding plug. The rear shell 6 is located at a rear side of the insulative housing 1 and engages with the metal shell 5.

Referring to FIGS. 4 and 5, in an insertion process of the corresponding plug, the oblique portions 4133, 4143 are pressed to drive the other portions of the slider 4 except the positioning portions 416, 417 moving downwardly along a clockwise direction circle round an intersection of the oblique portions 4133, 4143 and the positioning portions 416, 417, at this time, the shield portion 421 is drove to rotate downwardly along the clockwise direction. In the rotating process of the protecting mechanism 4, the front surface 101 resists the shield portion 421 forwardly to make the resisting portion 415 deform forwardly; besides, when lower ends of the vertical portions 4132, 4142 move downwardly and forwardly contact a front inner side wall 1061 of the receiving cavity 106, the front inner side wall 1061 would resist the vertical portions 4132, 4142 backwardly to make the vertical portions 4132, 4142 deform backwardly. When the corresponding plug is fully inserted into the receiving space 7, the oblique portions 4133, 4143 downwardly move out of the receiving space 7 and are partly received in the slits 522, all the resisting portion 415, shield portion 421, pivots 422, 423 and coil portions 411, 412 move downwardly into the receiving cavity 106 and depart from the receiving space 7 to unveil the light receiving element 34 in said insertion direction, then the light receiving elements 34 are forwardly exposed to the receiving space 7.

When the USB 2.0 plug is fully inserted into the receiving space 7, the protecting mechanism 4 moves downwardly out of the receiving space 7, while the USB 2.0 plug only connects with the contact portions 22 of the contacts 2 electrically to transmit electrical signals therebetween. When the optical plug is fully inserted into the receiving space 7, the protecting mechanism 4 moves downwardly out of the receiving space 7, then the optical plug not only electrically connects with the contact portions 22 of the contacts 2 to transmit electrical signals therebetween, but also optically mates with the optical module 3 to transmit optical signals therebetween without any hindrance.

When the plug is pulled out of the receiving space 7, the first and second oblique portions 4133, 4143 rebound to drive the door 42 moving upwardly along an anticlockwise direction. Finally, the shield portion 421 returns to a preliminary status to shield the light receiving elements 34 and protect the light receiving elements 34 from being covered by dust or destroyed by other thing.

Of course, the protecting mechanism 4 can be alternatively designed to be hanged on the top wall of the metal shell, the protecting mechanism 4 lies in a vertical plane to cover the light receiving element 34 when the optical plug is not inserted into the receiving space 7, and rotates along an anticlockwise direction to horizontally joint against an inner side of the top wall to unveil the light receiving element 34, which also can reach the dustproof purpose.

It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.