JPH0522888Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a socket, and particularly to a socket to which a plug is connected.

BACKGROUND ART There is a plug that has a plurality of contact pins including a grounding contact pin and a metal shielding pipe surrounding the contact pins. A conventional socket to which this plug is connected includes a grounding contact member that contacts the grounding contact pin, a contact member that contacts other contact members, and a grounding terminal member that contacts the pipe.

Problems to be Solved by the Invention The socket is fixed on the printed circuit board by soldering the contact members and the ground terminal member to corresponding patterns on the printed circuit board. Although both the ground contact member and the ground terminal member are soldered to the ground pattern, no consideration has been given to integrating the two.

The object of the present invention is to provide a socket that solves the above problems.

Means for Solving the Problems The present invention integrates a grounding contact member and a grounding terminal member into a single component, and includes a contact portion in which a grounding contact pin contacts the single component; The contact portion with which the pipe comes into contact is disposed with a step corresponding to the upper socket in the insertion direction of the socket.

Embodiment Next, an embodiment of the socket according to the present invention will be described.

First, a connector to which the present invention is applied will be explained. The connector includes a plug 1 having an optical transmitting/receiving module structure shown in FIGS. 1A and B, and this plug 1.
The socket 2 shown in FIGS. 2 to 5, and FIGS. 11 and 12 is connected to the socket 2.

As shown in FIGS. 1A and 1B, the plug 1 has a light emitting diode 3, a photodiode IC 4,
A circuit board assembly 5 for signal processing is incorporated, and a contact pin 6 for reception data, a contact pin 7 for grounding, a contact pin 8 for transmission data, and a contact pin 9, 10 for power supply are made of metal at the tip. It has a protruding structure surrounded by a shielding pipe 11, and is provided at both ends of a two-core fiber cable 12.

In the socket 2, as shown in FIGS. 2 to 5, the receiving data contact member 13, the grounding contact member 14, the sending data contact member 15, and the power supply contact members 16 and 17 are made of synthetic resin. It is built into the socket body 18 and is locked by a cover member 19 attached from the back side to prevent it from coming off.For example, it is fixed to a printed circuit board of the computer body and provided on the back side of the computer body. .

By connecting plug 1 to socket 2,
A two-core fiber cable 12 connects the two computer bodies.

The light emitting diode 3 and photodiode IC 4 are
As shown in Fig. 6A and B, the support stand 2 has a substantially cylindrical shape.
It is fixed at 0. This support base 20 and a substantially cylindrical holding member 21 that penetrates and holds each of the contact pins 6 to 10 are fitted to both ends of the circuit board assembly 5 as shown in FIGS. 7A to C. The contact pins and terminals are soldered and fixed as shown in matte finish, thereby forming an optical transmitting/receiving unit 22. The circuit board assembly 5 is mounted on the circuit board 23.
CMOS type IC chip 24, transistor 25, 2
6. This is a configuration in which chip capacitors 27 and 28 are mounted. The above unit 22 has a circuit configuration as shown in FIG. Photodiode IC4
The received optical signal undergoes waveform shaping and the like in the photodiode IC4, is level-converted to a CMOS level via the interface circuit 29, and is outputted from the contact pin 6 as an electrical signal. The electrical signal input to the contact pin 8 is
It is applied to the light emitting diode drive circuit 30, and the output from this is applied to the light emitting diode 3 via the constant current circuit 31, causing it to emit light.

As shown in FIGS. 7A to 7C, on the peripheral surface of the holding member 21, there are grooves 32a, 32b, 32c with triangular cross sections and grooves 33a, 33b with square cross sections, which both extend in the axial direction of the holding member 21. 33c are formed at non-uniform intervals. As shown in FIGS. 9A to 9C, the pipe 11 has protrusions 34a to 34c with triangular cross sections corresponding to the grooves 32a to 32c, and a groove 33.
Inward cut and raise pieces 35 corresponding to a to 33c
A to 35c are formed. Figure 7C, Figure 9C
Medium β ₁ and δ ₁ are respectively 135°, β ₂ , β ₃ , δ ₂ and δ ₃ are 112.5°
,
γ ₁ , γ ₂ , ε ₁ , ε ₂ are each 150°, γ ₃ , ε ₃ are each 60°
It is. Further, small openings 36a and 36b are formed on the left and right sides near the tip of the pipe 11.

The above unit 22 has a groove 32 in the holding member 21.
a to 32c are fitted with corresponding protrusions 34a to 34c to be positioned in the circumferential direction and restricted from rotating, and grooves 33a to 33 as shown in FIG.
Cut and raise pieces 35a to 35 corresponding to the terminal end of c
c, and its movement in the direction of arrow A is restricted, that is, it is incorporated into the pipe 11 in a state in which its escape from the pipe 11 is restricted.

Note that, on the opposite side of the pipe 11, as shown in FIGS. 1 and 10, the tip of a ferrule 37 is press-fitted and fixed. As a result, the unit 22 is fixed within the pipe 11 with rotation and axial movement restricted.

As shown in FIG.
The fiber cables 12a and 12b at one end of the fiber cables 12a and 12b are respectively tightened and fixed in a holder 38. The holder 38 is press-fitted into the ferrule 37, and the fibers 39a and 39b exposed from each fiber cable 12a and 12b are attached to the ferrule 3.
It is fixed within 7. Each fiber 39a, 39b
The front end faces of the photodiode IC 4 face the light emitting diode 3 and the photodiode IC 4, respectively.

40 is a cable cover, and 41 is a plug holder. The plug holder 41 is fixed to the ferrule 37 by a substantially U-shaped fixing member 42 shown in FIG. 14, and covers the ferrule 37 and the pipe 11.

As shown in FIG. 2, the socket body 18 has a cylindrical portion 50 for accommodating a contact member and an annular space 51 surrounding the cylindrical portion 50. As shown in FIG.

The protrusion 34 of the pipe 11 is provided on the circumferential surface of the cylindrical portion 50.
Grooves 52a with triangular cross sections corresponding to a to 34c,
52b and 52c are formed extending in the axial direction. In Figure 2, θ ₁ is 135°, θ ₂ and θ ₃ are each 112.5
°
It is.

Further, as shown in FIG. 3, the ground contact member 14 includes a first contact portion 14a that contacts the ground contact pin 7, and a second contact portion 14b that contacts the pipe 11. The second contact portion 14b is located at a lower portion of the annular space 51.

Further, as shown in FIGS. 4 and 5, the contact members 17, 16, 13, and 15 have contact portions 17a and 17a, which are in contact with the contact pins 10, 9, 8, and 6, respectively.
16a, 13a, and 15a. Both contact portions have a fork shape.

Further, on the front surface of the columnar part 50, a contact part 13a, a first contact part 14a, and contact parts 15a, 16a, 1
Holes 53 to 57 into which the contact pins are inserted are formed corresponding to holes 7a.

The above-mentioned plug 1 is constructed by aligning the protrusions 34a to 34c to correspond to the grooves 52a to 52c, respectively, and pressing them in the direction of arrow A in FIG. The contact pin 7 is inserted into the space 51 and pushes out the second contact portion 14b to make contact with it, and the contact pin 7 inserts through the hole 54 and pushes out the first contact portion 14a to make contact therewith.
As shown in FIG. 4, the contact pins 9 and 10 are inserted through the holes 56 and 57, respectively, and the contact portions 16a and 17 are inserted into the holes 56 and 57, respectively.
As shown in FIG. 5, the contact pins 6 and 8 pass through the holes 53 and 55, respectively, and spread the contact portions 13a and 15a and come into contact with them, and as shown in FIG. connected to.

When the plug 1 is connected to the socket 2, the computers are connected, and the electrical output signal from the first computer to which the socket 2 is attached is transmitted via the contact member 15 and the contact pin 8 as shown in FIG. added to the circuit 30 shown, the circuit 30
An output current of signal is fiber 3
9a to the second computer.
As shown in FIGS. 6A and 6B, the support base 20 is formed with an annular slope 58 in the shape of an inverted cone so as to surround the light emitting diode 3. A metal film 59 of Ni (which may also be Ag, Cu, Au, Sb, etc.) is adhered to the slope 58, and the slope 58 constitutes a reflective surface. The angle α of the slope 58 is determined to reflect the light emitted from the side surface of the light emitting diode 3 toward the tip surface of the fiber 39a. Therefore, not only the light emitted from the front surface of the light emitting diode 3 but also the light emitted from the side surface is reflected by the slope 58 and enters the fiber 39a, where it is used as part of the optical signal. Therefore, the amount of light emitted from the light emitting diode 3 is used effectively and without waste as an optical signal transmitted within the fiber 39a.

The signal from the second computer is transmitted as an optical signal within the fiber 39b, received by the photodiode IC4, where it is converted into an electrical signal, and further transmitted through the circuit 29 in FIG. 8 to the contact pin 6. , are supplied to the first computer via the contact member 13. Here, since the photodiode IC4 in which the photodiode part and the IC part are integrated is used, the electric signal converted by the photodiode part is immediately amplified and compared in the IC part, and the waveform is shaped and output. Therefore, there is no noise mixing between the photodiode and the IC, which would occur if the photodiode and the IC were provided separately, and the S/N ratio is improved.

Further, when the plug 1 is connected to the socket 2, the protrusions 34a to 34c are connected to the grooves 52a to 52c.
This prevents the plug 1 from rotating in the circumferential direction relative to the socket 2. Therefore, even when a rotational force is applied to the plug 1, this rotational force is received by the protrusions 34a to 34c and the grooves 52a to 52c, thereby preventing the rotational force from acting on the contact pin and the contact member.

In addition, in FIGS. 3 to 5, the distance from the front surface of the socket 2 to the first contact part 14a is a, the distance to the contact parts 17a and 16a is b, and the distance to the contact parts 13a and 15a is also the same. If c, then a
The relationship is <b<c. Also, each contact pin 6
The tips of ~10 are located on the same plane as shown in FIG. Therefore, when the plug 1 is inserted into the socket 2, the ground contact pin 7 first comes into contact with the contact member 14, then the power contact pins 9 and 10 come into contact with the contact members 16 and 17, respectively, and finally The reception data contact pin 6 and the transmission data contact pin 8 come into contact with the contact members 13 and 15, respectively.

Before being grounded and before power is connected,
If the receiving contact pin 6 and the transmitting contact pin 8 come into contact with the corresponding contact members 13 and 15, there is a risk that a part of the CMOS IC chip 24 will be destroyed, but in this embodiment, the contact pin 6, 8 is connected to the corresponding contact member 13, 1 after the grounding and the power supply are connected.
5, so the above when connecting
Destruction of the CMOS type IC chip 24 is reliably prevented.

Further, as mentioned above, the grounding contact pin 7 contacts first, and then the power supply contact pin 9,
It is preferable that 10 touch, but this order is not absolute.

Note that the distance d between the first contact portion 14a and the second contact portion 14b in FIG. 3 is equal to the distance e between the tip of each contact pin and the tip of the pipe 11 in FIG. It is determined. Thereby, the contact pin 7 contacts the first contact portion 14a, and at the same time, the pipe 11 contacts the second contact portion 14b.

Furthermore, when each contact pin contacts the corresponding contact portion and pushes it apart, the plug 1 receives a force that resists insertion. By the way, since the timing at which each contact pin contacts the contact portion is different as mentioned above, the drag force that plug 1 receives from socket 2 when plug 1 is connected to socket 2 is dispersed, and the When inserting the plug 1 into the socket 2, there is no need to apply a large force, and the plug is inserted smoothly.

In addition, each contact member 13 in the socket 2
17 as described above, the same effect can be obtained by arranging the contact pins of the plug in the same manner as the above-mentioned contact members. That is, the plug may have a structure in which the optical transmission unit 22A shown in FIG. 15 is incorporated. In FIG. 15, parts corresponding to those shown in FIG. 7B are designated by the same reference numerals, and their explanations will be omitted. The grounding contact pin 7A is the longest and maximum protruding, and the tips of the power supply contact pins 9A and 10A are set back by a dimension e from the tip of the grounding contact pin 7A.
The tips of the reception data contact pin 6A and the transmission data contact pin 8A are set back by a dimension f (>e) from the tip of the ground contact pin 7A.

The socket to which this plug is connected has a structure in which a plurality of contact members are arranged such that the contact portions at the tips of each contact member are located on the same surface.

When the above-mentioned plug is inserted and connected to this socket, the grounding contact pin 7A first comes into contact with the corresponding contact member, and then the power supply contact pins 9A and 10A come into contact, as in the previous case.
contacts the corresponding contact members, and finally, the reception data contact pin 6A and the transmission data contact pin 8A respectively contact the corresponding contact members. Therefore, the same effect as that of the structure in which the contact members in the socket are arranged with the contact portions at different positions as described above can be obtained.

In addition, when considering productivity, it is preferable to have a step in the contact member of the socket as shown in FIGS. 3 and 4 rather than a structure in which the contact pin of the plug has a step as shown in FIG. It is more advantageous to have a configuration in which this is the case. This is because the shapes of the contact members assembled into the sockets are originally different from each other, and therefore, there is no problem in assembling even if the dimensions are changed. Furthermore, by configuring the socket as shown in FIGS. 3 to 5, contact pins of the same shape and size can be used, which is advantageous in assembling the plug.

Further, as shown in FIGS. 2, 11, and 12, elastic fitting members 60, 61 are provided in the socket 2.
is provided. The elastic fitting members 60 and 61 are each formed by pressing metal pieces,
It has elastic pieces 60b and 61b with hemispherical protrusions 60a and 61a formed at their tips. The elastic fitting members 60, 61 are inserted into grooves 62, 63 inside the left and right side surfaces of the socket main body 18 from the back side, and are incorporated on both the left and right sides while being prevented from coming off by the cover member 19. Convex portions 60a, 61
a project into the annular space 51, respectively.

In the process of inserting the plug 1 into the socket 2, the pipe 11 pushes the protrusions 60a, 61a outward. As shown in FIG. 13, when the plug 1 is inserted to the final position where it is normally connected to the socket 2, the openings 36a, 36b of the pipe 11 are opposed to the protrusions 60a, 61a, respectively, and the protrusions 60a,
61a elastically fits into the openings 36a, 36b. When the protrusions 60a, 61a are fitted into the openings 36a, 36b, a sound is generated and transmitted to the worker's ears, and a click feeling is transmitted to the hand holding the plug 1. It is possible to sense that the connection has been completed, and the so-called connection operation feeling is improved. Further, the convex portions 60a and 61a fitted into the openings 36a and 36b also function to prevent the plug 1 from coming off.

Effects of the invention As mentioned above, according to the socket of the invention,
Since a single grounding contact member is sufficient, the number of parts is reduced, and the assembly work can be simplified accordingly.

Furthermore, since the first contact part and the second contact part are arranged with a step corresponding to the socket, when the socket is connected, the grounding contact pin and the shielding member are connected to the grounding contact member at the same time. This has the advantage that it is preferable than the case where the timing of the connection of the grounding contact pin and the connection of the shield member are different from each other.

[Brief explanation of the drawing]

1A and 1B are a sectional side view and a front view, respectively, of a plug connected to a socket according to the present invention, FIG. 2 is a front view of an embodiment of the socket according to the present invention, and FIGS. 3 and 4. , Figure 5 is the middle line in Figure 2, respectively.
- line, cross-sectional view along the - line, Figure 6A
6B is a cross-sectional view taken along line B-B in FIG. 6A, and FIGS. 7A to C are side views of the optical transmitter/receiver unit, respectively. Figure 8 is a circuit diagram of the optical transmitter/receiver unit, Figure 9 A, B, and C are side views of the shielding pipe, respectively, and a cross-sectional view taken along line B-B in Figure A. ,Front view,
Figure 10 shows the optical transmitter/receiver unit fixed in the pipe, Figures 11 and 12 are a partial cross-sectional plan view and side view of the socket, respectively, and Figure 13 shows the socket with the plug connected. FIG. 14 is a partially cross-sectional plan view showing the socket; FIG. 14 is a perspective view of the fixing member;
FIG. 5 is a plan view of an optical transmitter/receiver unit forming the main part of a modified example of the plug. 1...Plug, 2...Socket, 3...Light emitting diode, 4...Photodiode IC, 5...Circuit board assembly, 6,6A...Contact pin for receiving data, 7,7A...Contact pin for grounding ,
8,8A...Contact pin for transmission data, 9,
9A, 10, 10A...Power supply contact pin,
DESCRIPTION OF SYMBOLS 11... Metal shielding pipe, 12... Two-core fiber cable, 13... Contact member for receiving data, 13a to 17a, 14b... Contact portion, 14... Contact member for grounding, 15... Transmitting data contact member for power supply, 16, 17... contact member for power supply, 18... socket body, 19
...Cover member, 20... Support stand, 21... Holding member, 22, 22A... Optical transceiver unit, 23
... Circuit board, 24 ... IC chip, 25, 26
...Transistor, 27, 28...Chip capacitor, 29...Interface circuit, 30...
Light emitting diode drive circuit, 31...constant current circuit,
32a to 32c... Grooves with triangular cross section, 33a to 32c
33c... Groove with square cross section, 34a to 34c...
...Protrusion, 35a-35c...Cut and raise piece, 36
a, 36b...opening, 37...ferrule, 38
...Holder, 39a, 39b...Fiber, 40
... Cable cover, 41 ... Plug holder, 4
2...Fixing member, 50...Cylindrical portion, 51...Annular space, 52a to 52c...Groove with triangular cross section, 5
3-57... Hole, 58... Slope, 59... Metal film, 60, 61... Elastic fitting member, 60a, 61
a...Convex portion, 60b, 61b...Elastic piece, 62,
63...Groove.

Claims (1)

[Claims for Utility Model Registration] In a socket to which a plug is connected which has a plurality of contact pins including a grounding contact pin and a shield member surrounding these, when the plug is connected, the grounding contact pin It incorporates a single grounding contact pin member having a first contact portion with which the shield member contacts and a second contact portion with which the shield member contacts, and the first contact portion and the second contact portion and a distance corresponding to the distance between the tip of the grounding contact pin and the tip of the shield member in the axial direction of the socket and the axial direction of the plug.