JPH0440286Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a connector for photoelectric conversion, and particularly to a connector for photoelectric conversion suitable for connecting an optical fiber to a light emitting element, a light receiving element, etc.

Conventional connectors for this type of photoelectric conversion include:
For example, there was one shown in a schematic cross-sectional view in FIG. 1 of the accompanying drawings. This conventional photoelectric conversion connector includes an optical fiber plug coupling part 1 for coupling with an optical fiber plug to which an optical fiber is connected.
1, and the housing 10 includes an optical fiber plug coupling part 1.
A photoelectric conversion element storage recess 12 connected to the photoelectric conversion element storage recess 1 is formed. Then, the photoelectric conversion element storage recess 1
2, a photoelectric conversion element 20 such as a light emitting diode or a photodiode is inserted, and a suitable adhesive 21 is inserted into the hole.
Using this, the photoelectric conversion element 20 is fixed to the inner wall 12A of the recess 12, and is positioned and fixed relative to the center of the coupling part 11.

In the configuration of such a conventional photoelectric conversion connector, the positioning and fixing of the photoelectric conversion element 20 to the housing 10 must be performed using adhesive, which results in very low work efficiency. may adhere to the light-receiving or light-emitting surface 20A of the photoelectric conversion element 20, deteriorating its performance. Moreover, as shown in FIG. 2, in order to mount this conventional photoelectric conversion connector on the printed circuit board 30 of the photoelectric conversion device, the lead wires 22 of the photoelectric conversion element 20 must be bent. The housing 10 had to be inserted into the hole 31 of the board 30 and soldered to the circuit conductor of the board 30 as shown by reference numeral 32, and the housing 10 had to be fixed to the board 30 with screws 40 or the like. Therefore, such conventional photoelectric conversion connectors have disadvantages in that mounting workability is poor and at the same time, the connector is large due to the need for fixing locations using screws or the like.

An object of the present invention is to provide a photoelectric conversion connector that eliminates the drawbacks of the conventional photoelectric conversion connector, has good mounting workability, and can occupy less space.

The photoelectric conversion connector according to the present invention includes a housing having a coupling part for coupling with a mating connector on the front part and a recess for housing and positioning the photoelectric conversion element assembly in the rear part, and a housing that is attached to the housing. The photoelectric conversion element assembly includes a photoelectric conversion element and a rectangular parallelepiped main body as a whole with the photoelectric conversion element disposed on the front surface, and the front surface of the recess is , the photoelectric conversion element of the photoelectric conversion element assembly communicated with the interior of the coupling part and housed in the recess is exposed to the interior of the coupling part; At least three positioning regulating surfaces are provided for regulating positioning by bringing at least a portion of three mutually orthogonal surfaces of the main body into contact with each other, and the leaf spring member projects into the recess. The photoelectric conversion element assembly has a hook-shaped spring piece that elastically engages with the back surface of the main body of the photoelectric conversion element assembly housed in the recess, and the photoelectric conversion element assembly The conversion element is configured such that when the main body is pressed and held by the hook-shaped spring piece that engages with the back surface of the main body in a state where the positioning is regulated by the respective positioning regulating surfaces, the inner part of the coupling part is It is characterized by being aligned with respect to the center.

According to an embodiment of the present invention, the plate spring member is integrally formed with a dip terminal protruding from the housing.

Next, the present invention will be described in more detail with regard to embodiments of the present invention based on FIGS. 3 to 5 of the accompanying drawings.

FIG. 3 is an exploded parts arrangement perspective view showing the photoelectric conversion connector as an embodiment of the present invention viewed diagonally from above, and FIG. 4 is an exploded parts arrangement perspective view showing the photoelectric conversion connector of FIG. FIG. 3 is a perspective view of the exploded parts arrangement as seen.

As shown in FIGS. 3 and 4, the photoelectric conversion connector of this embodiment includes a housing 100 made of plastic material, metal material, etc., and a leaf spring member 11 attached to this housing 100.
0. For example, a mating connector coupling portion 101 for coupling an optical fiber connection plug as described later is provided on the front surface of the housing 100.
are integrally provided. An opening 101A for receiving a ferrule holding an optical fiber of an optical fiber connecting plug is formed in the center of this mating connector coupling part 101, and an opening 101A for receiving a ferrule holding an optical fiber of an optical fiber connecting plug is formed on the outer periphery of this mating connector coupling part 101. Male thread 10 that engages with the female thread of the tightening nut of the plug
1B is formed. Furthermore, the housing 100
As clearly shown in FIG. 4, a recess 102 for receiving, housing, and positioning the photoelectric conversion element assembly 120 is formed from the bottom surface to the top surface. As will be described later, this recess 10 has a mating connector coupling portion 101 at its front surface.
It communicates with the opening 101A.

The leaf spring member 110 is preferably formed integrally by punching and bending a metal material with good spring properties and good solderability, such as brass, perylium, etc., phosphor bronze, etc. The leaf spring member 110 of this embodiment has both legs 112 connected by an upper joint arm 111, and has both legs 112 connected by an upper joint arm 111.
11 has a hook-shaped spring piece 113 extending downward from the center of the back surface. At the lower end of each leg 112,
A pair of dip terminals 112A are formed extending downward.

As best shown in FIG.
0, the upper joint arm 11 of the leaf spring member 110 is
1 is formed in the housing 100, and on both sides of the recess 103, the housing 100 has through-side holes that penetrate from the upper side to the lower surface and into which both legs 112 of the leaf spring member 110 can be press-fitted. 1
04 is formed. Furthermore, the housing 1
00 is formed with an opening 105 that receives the hook-shaped spring piece 113 of the leaf spring member 110 from above. This opening 105 is connected to the recess 102, as best shown in FIG. Therefore, the hook-shaped spring piece 113 of the leaf spring member 110 is inserted into the opening 105, and each leg 112 is press-fitted into each through-side hole 104, and the leaf spring member 110 is inserted into the housing 100.
When the plate spring member 110 is attached to
Can protrude inward.

The photoelectric conversion element assembly 120 is made by molding a photoelectric conversion element 121 such as a light emitting diode or a light receiving diode together with the tips of lead wires 122 from a transparent plastic material 123 or the like. Recess 102 of housing 100
The shape matches the shape of the molded body 123 of this photoelectric conversion element assembly 120. That is, as clearly shown in FIGS. 3 and 4, the molded body 123 has a rectangular parallelepiped shape as a whole, has a top surface 123B, and has notches on both sides of the front surface 123C. It is believed that a groove was formed. Each of these notched grooves has a side wall 123D and a bottom wall 123E. On the other hand, the recess 102 of the housing 100 has a ceiling wall 102A against which the top surface 123B of the molded body 123 comes into contact, as clearly shown in FIG.
Furthermore, as clearly shown in FIG.
3E, and a front side wall 102C which is brought into contact with the front side wall 3E.

An example of the use of such a photoelectric conversion connector will be described below with reference mainly to FIG. 5.

After the leaf spring member 110 is attached to the housing 100 as described above, the photoelectric conversion element assembly 120 is inserted into the recess 102 from below. At this time, the holding protrusion 11 of the key-shaped spring piece 113 of the leaf spring member 110 that had protruded into the recess 102
3A is spring-biased rearward by the back surface 123A of the molded body 123 of the photoelectric conversion element assembly 120, and when the molded body 123 is completely inserted into the predetermined position of the recess 102, the molded body 1
The photoelectric conversion element assembly 120 is fixed in a predetermined position with respect to the housing 100 by pressing the photoelectric conversion element assembly 120 so as to slightly bite into the back surface 123A of the housing 100. The leaf spring member 11 for such a housing 100
0 and the photoelectric conversion element assembly 120 are installed and fixed, the dip terminal 112 of the leaf spring member 110
A and the lead wire 12 of the photoelectric conversion element assembly 120
2 protrudes downward from the lower surface of the housing 100. The photoelectric conversion elements 121 of the photoelectric conversion element assembly 120 are aligned with the center of the opening 101A of the mating connector coupling portion 101 of the housing 100. That is, the housing 100
The molded body 123 of the photoelectric conversion element assembly 120 inserted into the recess 102 of
3B comes into contact with the ceiling wall 102A of the recess 102, thereby opening the opening 10 of the mating connector coupling portion 101.
Positioning is restricted in the vertical direction with respect to the center of the recess 102, and the side wall 123D is aligned with the side wall 10 of the recess 102.
2B, the mating connector coupling portion 101
Positioning is restricted in the lateral direction with respect to the center of the opening 101A of the mating connector coupling portion 101, and by abutting the bottom wall 123E against the front side wall 102C of the recess 102, Positioning regulations are in place. With such positioning restrictions in place, the molded body 123 is fixed in the recess 102 by the spring deflection force of the pressing protrusion 113A of the hook-shaped spring piece 113, so that the molded body 123 The photoelectric conversion element 121 arranged at a predetermined position is inserted into the opening 10 of the mating connector coupling portion 101 of the housing 100.
It is reliably aligned and maintained with respect to the center of 1A.

In order to attach the photoelectric conversion connector to which the photoelectric conversion element assembly 120 is mounted on the printed circuit board of the photoelectric conversion device, as shown in FIG.
The lead wire 122 and the dip terminal 112A may be inserted into the terminals 1 and 42 and soldered as shown by reference numbers 43 and 44, respectively.

As an example of a mating connector coupled to such a photoelectric conversion connector, the structure of the optical fiber connection plug shown on the left side of FIG. 5 will be briefly described. This optical fiber connection plug 200
consists of a ferrule 201 that holds the ends of the fiber core 301 and the fiber sheath 302 of the optical fiber 300 in predetermined positions, a tightening nut 202 provided around the ferrule 201, and a tightening nut 202 provided at the rear end of the ferrule 201 that It mainly includes a hood 203 that holds a fiber 300.
The inner circumference of the tightening nut 202 has a female thread 202A.
is formed.

As shown on the right side of FIG. 5, the tip of the ferrule 201 is inserted into the opening 101A of the mating connector coupling part 101 of the photoelectric conversion connector mounted on the printed circuit board 40, and then tighten the tightening nut. By engaging the female screw 202A of 202 with the male screw 101B on the outer periphery of the mating connector coupling portion 101, the optical fiber connection plug 200
can be coupled to the photoelectric conversion connector. In this connected state, the plug 200
Fiber core wire 3 of optical fiber 300 connected to
The end face of 01 and the photoelectric conversion element 121 are held in alignment facing each other, and are optically coupled to each other.

Since the photoelectric conversion connector of the present invention has the above-mentioned configuration, it can be used without using any adhesive or the like.
The photoelectric conversion element can be mounted and fixed, and therefore the workability of assembling the photoelectric conversion element can be significantly improved. In addition, if a dip terminal is provided on the leaf spring member, it can be mounted on a printed circuit board without using special parts such as screws, so it can be mounted in a relatively space-saving manner. . Furthermore, by using the shape of the leaf spring member as in the above-described embodiment, this leaf spring member also performs an electromagnetic shielding function.
The performance of the photoelectric conversion device can be improved.

[Brief explanation of the drawing]

FIG. 1 of the accompanying drawings is a schematic sectional view showing an example of a conventional photoelectric conversion connector, FIG. 2 is a schematic sectional view showing the photoelectric conversion connector of FIG. 1 mounted on a printed circuit board, and FIG. The figure is an exploded parts arrangement perspective view showing a photoelectric conversion connector as an embodiment of the present invention viewed diagonally from above.
FIG. 5 is an exploded parts arrangement perspective view showing the photoelectric conversion connector shown in the figure as viewed diagonally from below, and FIG. 5 is a schematic diagram illustrating the state in which the photoelectric conversion connector shown in FIG. FIG. DESCRIPTION OF SYMBOLS 100... Housing, 101... Mating connector coupling part, 102... Recessed part, 110... Leaf spring member, 110, 112A... Deep terminal, 113
...Key-shaped spring piece, 113A... Presser protrusion, 12
0... Photoelectric conversion element assembly, 121... Photoelectric conversion element, 122... Lead wire, 123... Molded body, 200... Optical fiber connection plug, 3
00...Optical fiber.

Claims (1)

[Scope of utility model registration request] It is equipped with a housing having a coupling part for coupling with a mating connector on the front part and a recessed part for housing and positioning the photoelectric conversion element assembly in the rear part, and a leaf spring member attached to the housing. The photoelectric conversion element assembly includes a photoelectric conversion element and a rectangular parallelepiped main body with the photoelectric conversion element disposed on the front surface, and the front surface of the concave portion communicates with the inside of the coupling portion. The photoelectric conversion element of the photoelectric conversion element assembly housed in the recess is exposed to the inside of the coupling part, and the inner surface of the recess allows the three mutually orthogonal At least three positioning regulating surfaces are provided for regulating positioning by bringing at least a portion of the surfaces into contact with each other, and the plate spring member projects into the recess and the photoelectric conversion element assembly is housed in the recess. The photoelectric conversion element of the photoelectric conversion element assembly is housed in the recess, and has a hook-shaped spring piece that elastically engages with the back surface of the three-dimensional main body, and the photoelectric conversion element of the photoelectric conversion element assembly is housed in the recessed portion. When pressed and held by the hook-shaped spring piece that engages with the back surface of the main body in a state where the positioning is restricted by the surface, the main body is aligned with the center of the interior of the engaging part. A connector for photoelectric conversion.