JPH059699Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention ensures that when a plug is inserted into the receptacle of an optical connector, the ferrule is electrically and mechanically secured by the lock pin inside the receptacle. The invention relates to an optical receptacle adapted to be retained.

[Prior Art] Generally, the optical receptacle 12 is shown in FIGS. 4 and 7.
As shown in FIG. 8 and FIG. 8, a lock pin 8 and a rubber shutter 7 are fitted into a groove 6 in a housing 4 in which a ferrule insertion hole 13 is bored, and a phototransistor 11 is attached to this housing 4 from the rear. The housing 5 is fitted, and the protrusions 16 of the conductive housing 5 are press-fitted into the square holes 15 on both sides of the housing 4.

The lock pin 8 has a shape as shown in FIGS. 5 and 6, and is fitted into the groove 6 in the middle of the ferrule insertion hole 13. Therefore, when the ferrule 9 is inserted into the ferrule insertion hole 13, the lock pin 8 is inserted into the ferrule insertion hole 13. The lock pin 8 is inserted into the locking groove 14 of the ferrule 9 and faces the phototransistor 11 by pushing it apart and pushing and bending the rubber shutter 7.

In such an optical receptacle, the conventional locking pin 8 is formed by bending it into an Ω-shape using stainless steel wire or the like, as shown in FIGS. 5 and 6, and is engaged with the engagement groove 14 of the ferrule 9. This serves to prevent the ferrule 9 from coming off, and is electrically connected to the ground fitting 10 via the conductive housing 5.

[Problems to be solved by the invention] As mentioned above, the housings 4 and 5 are assembled by press-fitting the protrusion 16 into the square hole 15, but the protrusion 16 goes over the inner wall of the housing 4 and fits into the square hole 15. In order to do this, a gap 17 inevitably occurs after mating, and
Shaking occurs. Furthermore, since the conventional lock pin 8 was formed into a flat shape as shown in FIG. If the lock pin 8 and the conductive housing 5 do not come into close contact with each other, a slight gap will be created, increasing the contact resistance between the lock pin 8 and the conductive housing 5, which may cause noise generation. Due to the wobbling and wobbling within the groove 6 of the ferrule 9, the axis of the phototransistor 11 and the axis of the ferrule 9 do not match accurately, resulting in problems such as interfering with signal transmission between them.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention forms a groove in the middle of the ferrule insertion hole provided in the housing and crosses the ferrule insertion hole in a right angle direction. A lock pin having two contact portions in the same plane is housed in the groove, the contact portion of the lock pin faces the ferrule insertion hole, and a lock pin is placed perpendicular to the insertion direction to engage the contact portion. In an optical receptacle that mechanically holds and electrically connects a ferrule having an engagement groove, the locking pin has an intermediate portion between the contact portion and the contact portion, and the lock pin has an intermediate portion between the contact portion and the contact portion. A bent part bent in a right angle direction is formed in the intermediate part, and both side parts of the bent part are elastically pressed against both opposing inner wall surfaces of the groove while holding the contact part in the same plane. It is.

[Operation] When the lock pin is fitted into the groove in the housing,
Since the lock pin has a bent portion, it comes into close contact with the conductive housing within the groove, resulting in low electrical contact resistance and no rattling when the housing is assembled.

[Example] An example of the present invention will be described based on FIGS. 1 to 3.

In FIGS. 1 and 2, the lock pin 1 has a predetermined diameter at both ends from a straight intermediate portion 2.
After bending 180 degrees, bend it downward to form contact parts 3, 3 in the same plane, and furthermore, this contact part 3,
Further, in the present invention, a bent portion 18 is formed at an angle θ in a direction perpendicular to the plane including the contact portions 3, 3 at approximately the center of the intermediate portion 2. has been done. This bent portion 18 is bent by about 10 to 20 degrees as shown in FIG. When the lock pin 1 formed in this manner is press-fitted into the groove 6 of one of the housings 4, both side surfaces of the lock pin 1 are in pressure contact with both inner wall surfaces of the groove 6, and the contact portions 3, 3 are in the same plane. It will be incorporated as is. Furthermore, the rubber shutter 7 and the other conductive housing 5 are assembled. Then, the surface of the groove 6 of the conductive housing 5 presses the lock pin 8 to ensure electrical contact, and after the protrusion 16 is locked in the square hole 15, the force of the spring of the lock pin 1 makes it conductive. The housing 5 is pushed outwards and installed without any gaps 17. At this time, the lock pin 8 is attached to the rubber shutter 7.
Also presses. Therefore, the entire assembly fits securely without wobbling.

In such a configuration, the ferrule insertion hole 13
When the ferrule 9 is inserted, the lock pin 8 is pushed out and the rubber shutter 7 is pushed and bent as it is inserted. Then, the lock pin 8 is fitted into the engagement groove 14 and locked. In this state, optical signals are transmitted or received between the ferrule 9 and the phototransistor 11.

[Effects of the invention] Since the invention is constructed as described above, the lock pin is securely held in the groove of the housing without creating a gap, and the ferrule does not shake when inserted into the ferrule insertion hole. . In addition, the lock pin and the housing are in close contact with each other, resulting in sufficiently low contact resistance and the ability to prevent noise generation.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the optical receptacle according to the present invention, FIG. 2 is a plan view of the lock pin according to the present invention, FIG. 3 is a front view of FIG. 2, and FIG. 4 is a diagram showing a conventional optical receptacle. A sectional view, FIG. 5 is a plan view of a conventional lock pin, FIG. 6 is a front view of FIG. 5,
Figure 7 is a cross-sectional view of a conventional optical receptacle;
The figure is a perspective view of an optical receptacle. 1, 8... Lock pin, 3... Contact part, 4, 5
... Housing, 6 ... Groove, 7 ... Rubber shutter, 9 ... Ferrule, 11 ... Photo transistor, 12 ... Optical receptacle, 15 ... Square hole,
16...Protrusion, 17...Gap, 18...Bending portion.

Claims (1)

[Claims for Utility Model Registration] (1) A locking pin having a groove that crosses the ferrule insertion hole at right angles in the middle of the ferrule insertion hole provided in the housing, and having at least two contact portions in the same plane. In an optical receptacle that is housed in the groove and has a contact portion of the lock pin facing the ferrule insertion hole, the contact portion mechanically holds the ferrule and electrically connects the ferrule. A bent part having an intermediate part between the contact parts and bent in a direction perpendicular to a plane including the contact part is formed in the intermediate part, and both side parts of the bent part are formed on both opposing inner wall surfaces of the groove. An optical receptacle characterized by elastic pressure contact. (2) The optical receptacle according to claim 1, wherein the locking pin is Ω-shaped and has a bent portion in the center.