JPH043421Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to a pin plug particularly suitable for coupling with a pin jack with an optical element.

``Prior Art'' There is a pin jack with an optical element in which an optical pin plug is inserted and optically coupled, and an electrical pin plug is inserted and electrically coupled. In order to achieve good optical coupling in this pin jack with an optical element, it is preferable that the ferrule of the inserted optical pin plug abuts on the optical element in the pin jack and maintains this abutting state.

This invention provides a pin plug that operates a locking mechanism when inserted into a pin jack.

"Means for Solving the Problem" According to this invention, a pin is held coaxially inside a cylindrical body, the pin protrudes from the cylindrical body, and a ring is attached to the outer periphery of the protruding end of the pin. A locking protrusion having a shape is formed, and the locking protrusion has at least one portion removed within a certain angle range with respect to the axis of the pin.

Because of this structure, when the pin is inserted into the pin jack, the protrusion on the movable contact piece of the pin jack engages with the locking protrusion and becomes locked, and to release the lock, rotate the pin. The locking protrusion can be easily removed by positioning the removed portion within a certain angular range against the protrusion of the movable contact piece.

Embodiment FIG. 1 shows the state of engagement between a pin plug 11 of this invention and a pin jack 12 with an optical element. As the optical element-equipped pin jack 12, for example, the one proposed in Utility Model Application No. 108152/1983 entitled "Pin Jack with Optical Element" can be used. Through hole 1 in main body 13 of insulating material
4 is formed, and an optical element accommodating part 15 is formed at the rear end thereof communicating with the through hole 14.
An optical element 16 is housed in 5. The front surface of the optical element 16 faces the through hole 14 . A movable contact piece 17 is attached to the main body 13 , and the movable contact piece 17 is located in the through hole 14 , and the rear end of the movable contact piece 17 is bent at an almost right angle to serve as a terminal 18 and a back surface of the optical element 16 . A restraining piece 19 is integrally formed. A contact protrusion 2 is provided at the contact portion of the movable contact piece 17.
1 is highlighted. The outside of the main body 13 is covered with metal covers 22 and 23.

A shutter 24 for opening and closing the front end of the through hole is rotatably provided, and the shutter 24 is always biased in the closing direction by a spring 25. As will be explained later, the front surface of the main body 13 has a positioning recess 2.
6 is formed.

In the pin plug 11 according to this invention, a cylindrical body 32 is attached to the fixed part 31 so as to protrude forward from the fixed part 31. A cover 33 covers the fixed part 31 and the cylindrical body 32. A ferrule 34 serving as a pin is held by the fixed portion 31 at the axial center position of the cylindrical body 32 . The ferrule 34 protrudes from the cylindrical body 32, and a ring-shaped locking protrusion 35 is integrally formed on the outer periphery of the protruding end. At least one portion is provided. In this embodiment, as shown in FIG. 2, two cut surfaces 36 parallel to the axis of the ferrule 34 are formed at the end of the ferrule 34 with an angular interval of 180 degrees, and the portion removed by the protrusion 35 is two. This is the case when one is provided.

When the ferrule 34 of the pin plug 11 is inserted into the through hole 14 of the pin jack 12, the tip of the ferrule 34 comes into contact with the optical element 15, and in this state, the protrusion 21 of the movable contact piece 17 climbs over the locking protrusion 35, and the protrusion 21 It engages with the locking protrusion 35 and becomes locked. When the ferrule 34 is rotated from this state so that the cut surface 36 is positioned opposite the protrusion 21, the locked state is released and the ferrule 34 can be easily pulled out from the pin jack 12.

In this embodiment, the ferrule 34 is configured to automatically come out when the cut surface 36 is positioned opposite the protrusion 21. That is, a cylindrical movable bush 37 is provided between the cylindrical body 32 and the ferrule 34 in the pin plug 11 so as to be movable in the axial direction, and the movable bush 37 is biased outward by a coil spring 38. A stopper 39 is formed on the front inner peripheral edge of the cylindrical body 32 to prevent the movable bush 37 from coming off. A positioning projection 41 (FIG. 3) is formed projecting from the front surface of the movable bush 37, and the positioning projection 41 can be fitted into a positioning recess 26 formed on the front surface of the main body of the pin jack 12. When the pin plug 11 is connected to the pin jack 12, when the positioning protrusion 41 is inserted into the positioning recess 26, the angular position of the ferrule 34 is aligned with the locking protrusion 35 and the protrusion of the movable contact piece 17 as shown in FIG. 21 can be engaged with each other. The movable bush 37 is rotatable, but in order to obtain the above relationship, the movable bush 37 is at a predetermined angular position when the movable bush 37 is located at the front end. Therefore, movable bush 3
A pin protrusion 42 is protruded from the outer peripheral surface of the cylindrical body 32 , and a positioning groove 43 is formed in the cylindrical body 32 , and the pin protrusion 42 is inserted into the positioning groove 43 . One groove wall of the positioning groove 43 is enlarged diagonally rearward to form a guide edge 44.

When the movable bush 37 is located forward, the pin protrusion 42 is in the positioning groove 43, and at this time, the movable bush 37 is restricted by the positioning groove 43 and cannot rotate, so that the angular position of the ferrule 34 with respect to the locking protrusion 35 is set at a predetermined value. It is in a state of When the positioning protrusion 41 is inserted into the positioning recess 26 in this state, the protrusion 21 of the movable contact piece 17 engages with the locking protrusion 35, making it possible to lock. When the ferrule 34 is inserted into the pin jack 12, the protrusion 21 climbs over the locking protrusion 35 and becomes locked, and the movable bush 37 is pushed by the pin jack 12 and the coil spring 38
move backwards against the biasing force of

When the pin plug 11 is rotated so that the cut surface 36 of the locking protrusion 35 faces the protrusion 21, the protrusion 21 no longer engages with the locking protrusion 35, and since the movable bush 37 is pushing the pin jack 12,
The ferrule 34 automatically comes out of the pin jack 12. At this time, the pin protrusion 42 is attached to the diagonal guide edge 4.
4 and moves along the guide edge 44, that is, the movable bush 37 moves forward while rotating,
The pin protrusion 42 enters into the positioning groove 43.

One end of the coil spring 38 is fixed to the fixed part 31,
If the other end is fixed to the movable bush 37, the movable bush 37 will move to the ferrule 34 when the lock is released.
As a result, the coil spring 38 is twisted, and its restoring force can return the pin protrusion 42 into the positioning groove 43. In this case, the guide edge 44 may be omitted. The shutter 24 may be omitted. In the above description, a pin jack with an optical element is used as the mating pin jack, but an electric pin jack may also be used.

``Effects of the invention'' As described above, according to this invention, the connection with the pin jack can be locked with the simple structure of providing a locking protrusion on the pin of the pin plug, and the conventional pin jack can be used as is. Bye. When the pin plug of this invention is coupled to the optical pin jack as described above, the coupled state, that is, the state in which the tip of the ferrule is in contact with the optical element, can be maintained, and a good connection can be obtained. Furthermore, if the above-described embodiment is used, the pin plug will automatically be pulled out from the pin jack when the lock is released. Furthermore, positioning during coupling is performed automatically, ensuring reliable locking.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing an example of a pin plug according to this invention and a pin jack with an optical element,
Figure 2 is a cross-sectional view of the ferrule in Figure 1, taken along line AA.
FIG. 3 is a perspective view showing the movable bush 37.

Claims (1)

[Claims for Utility Model Registration] A cylindrical body, a pin coaxially held inside the cylindrical body and protruding from the cylindrical body, and a ring-shaped member formed around the outer periphery of the protruding end of the pin. a locking protrusion, the locking protrusion having at least one portion removed within a certain angular range with respect to the axis of the pin.