JPH0442808Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a body assembly structure of a converter in a light emitting/receiving connector.

(Prior art) When transmitting information using an optical fiber line, on the transmitting side, light emitted from a light emitting element that converts an electrical signal into an optical signal is coupled to the optical fiber line, and on the receiving side, the optical signal is transmitted through the optical fiber. The light is coupled to a light receiving element and converted into an electrical signal. In this case, for example, a light emitting/receiving connector as shown in FIG. 1 is used.

This connector includes a ferrule 2 with a support flange that holds an optical fiber 1 in the center, a coil spring 4 that supports the ferrule in a body 3, and a spring support sleeve 5.
A light emitting/receiving part A consisting of a light emitting or receiving element fixed in the body 6 so that the light emitting surface or the light receiving surface is exposed by the converting part B, that is, the window 6a.
It consists of a conversion section B consisting of an electric conversion element 7. Then, by inserting the ferrule 2 into the sleeve 6b of the body 6 as shown, the exposed end surface 1a of the optical fiber 1 and the light emitting or light receiving end surface 7a of the photoelectric conversion element 7 are maintained at a uniform close distance. The electrical system and optical system are connected by facing each other.

(Problems with the prior art) However, in the conventional structure of the converter B,
Not only is it difficult to fix the body 6 within the housing 8, but insufficient fixation may impede heat dissipation generated in the conversion element 7, and furthermore, the shielding may be insufficient. That is, in this converter B,
A metal housing is constructed by fitting cylindrical metal fixing sleeves 9 and 10 into the outer periphery of the insertion sleeve 6b of the ferrule 2 of the metal body 6 that houses and fixes the conversion element 7, and the conversion element housing sleeve 6c. 8, the end of the fixing sleeve 9 is held by the bent portion 8a of the housing 8, and the other end 8b of the housing is caulked by the holding protrusion 6d of the body 6, thereby fixing the body 6. It is being done.

However, with this structure, the fixing sleeves 9 and 10 tend to rattle within the housing 8 due to the return of the caulked end 8b of the housing 8 during caulking. Therefore, it is difficult to fix the body 6 within the housing 8 so that it does not move. Moreover, along with this, gaps are formed between the fixing sleeves 9 and 10 and the body 6 and furthermore the housing 8. Therefore, even if the photoelectric conversion element 7 is well thermally and electrically connected to the body 6, dissipation of the heat generated in the conversion element 7 to the external atmosphere is inhibited, and the continuity of the ground circuit is unstable or As the resistance grows,
The shielding effect of external noise may be impaired.

The present invention has been made for the purpose of providing a light emitting/receiving connector that eliminates the above-mentioned drawbacks, and the details thereof will be explained below with reference to the drawings.

[Structure of the idea]

(Means and effects for solving the problem) Fig. 2 is a sectional view of essential parts showing an embodiment of the present invention (the same reference numerals as in Fig. 1 indicate the same parts), and Fig. 3 is a fixing spring plate. FIG. 2 is a perspective view of one embodiment of the invention. The present invention is characterized in that, as shown in FIG. A metal spring plate 6 is interposed between the housing 8 and the end surface 6e of the element housing sleeve 6c, and the housing 8 is fixed by caulking one end 8b.

That is, as shown in FIG. 3, a reinforcing portion 11b is provided by bending the outer peripheral edge of the annular plate 11a, and a plurality of (four in the figure) spring force generating tongues are integrally provided on the inner peripheral edge. Insert ferrule 11c into sleeve 6b
The reinforcing portion 1 is inserted so as to form a sleeve insertion hole 11d.
Spring plate 1 formed by bending diagonally in the same direction as 1b
1 to the end surface 6e of the sleeve 6c as shown in FIG.
and the end surface 9a of the fixing sleeve 9. Note that when the tongue piece 11c is bent and its height is lowered by caulking one end of the housing 8, the reinforcing part 11b abuts against the end surface 6e of the sleeve 6b, and the sleeve is made so that the bending of the tongue piece 11c is not inhibited. There is a notch 6 on the shoulder of 6b as shown in Figure 2.
f is provided, or the height of the reinforcing portion 11b is
It is better to set it lower than the height of

In this way, when the one end 8b of the housing 8 is caulked, the fixing sleeve 9 pushes the spring plate 11 as the caulking progresses, causing a spring force to be generated in the tongue piece 11c. As a result, even if the caulked end 8b returns, the resulting backlash in the direction of the central axis of the body 6 of the fixing sleeve 9 is immediately compensated for by the return of the tongue piece 11c.

(Effects of the Invention) As described above, the present invention compensates for the return of the caulking of the housing by the return of the tongue piece 11c of the spring plate. Therefore, the body 6 is securely fixed in the housing 8 via the fixing sleeves 9 and 10 without any play, so when the ferrule 2 of the light emitting/receiving section A is inserted into the sleeve 6a of the converting section B. , body 6 does not move. Also, the fixing sleeves 9, 10
The body 6 and the housing 8 are pressed into contact with each other by the spring force generated on the spring plate 11 by caulking, so that the electrical and thermal connection between the housing 8 and the body 6 is good, and a shielding effect is achieved. The heat dissipation effect of the conversion element 7 can be fully exhibited. The drawbacks of conventional connectors are therefore eliminated.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional connector, and FIGS. 2 and 3 are a sectional view of a main part of an embodiment of the present invention and a perspective view of an embodiment of a spring plate. DESCRIPTION OF SYMBOLS 1... Optical fiber, 1a... End face, 2... Ferrule, 3... Body, 4... Spring, 5... Spring bearing sleeve, A... Light receiving part, B... Conversion part, 6
...Body, 6a...Window, 6b...Ferrule insertion sleeve, 6c...Conversion element housing sleeve,
6d...Retaining protrusion, 6e...Body end surface, 6
f... Notch, 7... Conversion element, 7a... Emitting or light receiving surface, 8... Housing, 8a... Retaining end, 8b... Caulking end, 9, 10... Fixing sleeve, 11... Spring plate, 11a... Annular plate, 11
b... Reinforcement part, 11c... Spring force generating tongue piece, 1
1d...Sleeve insertion hole.

Claims (1)

[Scope of utility model registration request] A ferrule insertion sleeve 6b of the metal body 6 and a conversion element housing sleeve 6c having a larger diameter than the ferrule insertion sleeve 6b are fitted with metal fixing sleeves 9 and 10, and the metal fixing sleeves 9 and 10 are fitted into the metal housing 8. and a retaining protrusion 6 provided on the body 6 so that one end of the fixing sleeve 9 is retained at one end retaining end 8a of the housing 8, and a caulking end 8b of the other end of the housing 8 is provided on the body 6.
At the conversion portion of the light emitting/receiving connector where the body 6 is fixed in the housing 8 by crimping the body 6 into the housing 8, the fixing sleeve 9 fitted onto the end surface 6e of the conversion element accommodating sleeve 6c and the ferrule insertion sleeve 6b is attached. It has an annular shape with a sleeve insertion hole 11d large enough to be inserted onto the ferrule insertion sleeve 6b between it and the end surface 9a of the annular plate 11a, and protrudes by being bent in the same direction from the inner peripheral edge of the annular plate 11a. A spring plate 11 having a plurality of spring force generating tongue pieces 11c is interposed between the spring plate 11 and the spring force generating tongue pieces 11c.
A converter assembly structure of a light emitting/receiving connector, characterized in that the end portion 8b of the housing 8 is caulked in a state in which the housing 8 is compressed.