JPH0240873A - Plug-in connector - Google Patents

Abstract

PURPOSE:To enable a highly precise positioning in the installation of a package board to a unit by making the guide port of a package housing guide the guide part of a rear housing to achieve the engagement. CONSTITUTION:In the insertion of a package board 1 to a unit 1, the guide part 333 of the second housing 32 of a rear connector 3 is guided by the guide port 22 of a package housing 21 to achieve the engagement. When the package board 1 is further inserted, the guide taper 23 of a package connector 2 is guided by the guide tape 311 of the first housing 31 while keeping the relative position to the face direction of a rear distributing plate 12. The package connector 2 picks the dimensional tolerance of the unit 1 and is engaged with the first housing 31, and the package connector 2 and the first and second housings 31, 32 are positioned. Hence, a highly precise positioning is made possible.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a plug-in connector that is suitable for bookshelf mounting, and is capable of flexibly responding to a wide variety of connection demands as a composite electrical, optical, or coaxial connector. It was devised to do so.

<Conventional technology> A plug-in connector is a connector that connects a package board with various components mounted on it and a backside wiring board provided on the backside of the unit in unit mounting where the package board is mounted on the unit in a bookshelf format. This is a connector that connects by plug-in operation to insert/remove the package board into/from the unit. Dimensional tolerances for each part of the unit are typically on the order of millimeters. Plug-in connectors require relatively large dimensional tolerances to achieve a good connection with a simple plug-in operation of insertion/removal.

An example of a conventional plug-in type electrical connector is shown in FIG. As shown in the figure, the back connector 81 consists of a housing 82 and female electrical terminals 6. Of these, the housing 82 is fixed to the back wiring board 12 together with the terminals by soldering or the like. The housing 82 also has a guide taper 83.
is provided. The package connector 84 is fixed to the package board 11 with fixing screws 24 and the like, and has a female electrical terminal 7 having a spring property held inside a housing 85.

Thus, the package board 11 is assembled into a unit (not shown).
When the package connector 84 is inserted into the
The package connector 8 is guided by the guide taper 83 of the back connector 81 to check the dimensional tolerance of the unit.
4 is moved and positioned to match the back connector 81. When the package board 11 is further inserted, the electrical terminals 6 of the back connector 81 fit into the electrical terminals of the package connector 84, completing the electrical connection.

In this way, the conventional plug-in electrical connector has a structure in which the package connector 84 is fixed to the package board 11 and the back connector 81 is fixed to the back wiring board 12, and the mutual connectors are positioned by guides between the housings. Met.

In the case of electricity, the connection is made by contacting the metal part of the terminal, whereas in the case of light, the connection is made by bringing the ends of the optical fibers held inside the plug and jack into contact and aligning the central axes of the optical fibers ( (optical axis alignment). This optical axis alignment is performed because the light transmission is carried out in the core part of the optical fiber (about 10IIa for single mode fiber).
The alignment accuracy is required to be on the order of microns, which is higher than the alignment accuracy of electrical connectors. In order to realize such a highly accurate optical connector connection in a plug-in format and obtain good characteristics, it is necessary for the plug-in connector to have a floating structure for the rear connector and to perform accurate positioning.

Also, in the case of coaxial, connection is made using the same method as for optical. That is, the connection is made by bringing the respective center conductors and outer conductors held inside the plug and jack into contact with each other so that their center axes coincide. Therefore, by making the outer diameter shapes of the coaxial plug and jack similar to the optical plug and jack shapes, respectively, the plug-in optical connector can be used as is for coaxial connection. For this reason, in the case where there is no difference between coaxial and optical connections, the explanation regarding the coaxial connection will be explained below with respect to the optical connection.

An example of a conventional plug-in type optical connector is shown in FIG. As shown in the figure, the plug-in optical connector 9 includes a package connector 91 fixed to the package board 11.
and a back connector 92 mounted on the back wiring board 12. Among these, the package connector 91 includes a housing 94 and a jack 5 held within the housing 94.
and a guide hole 95, and is fixed to the package board 11 with fixing screws 24. On the other hand, the back connector 92 includes a back housing 93, a plug 4, a guide pin 96, and a floating screw 97. At this time, the back housing 93
is floatingly fixed to the back wiring board 12 by floating screws 97. That is, the floating screw 97 has a tip σ2 fixed part 971,
It consists of a floating holding part 972 at the center and a holding part 973 at the rear, and the fixing part 971 can be fixed to the back wiring board 12 with a screw or the like.

The back housing 93 is held by the fixing part 971 of the floating screw and the holding part 973, but since a gap is provided between the floating holding part 972 and the hole 98 of the back housing 93, the back housing 93 is held by the holding part 971 of the floating screw. Minute back wiring board 1
It is held floating in the west direction of 2. The plug 4 passes through the back wiring board 12 and has a protruding tip 41, and the inner diameter of the plug through hole 121 is made larger than the outer diameter of the plug 4 so as not to prevent the back housing 93 from being held floating. The guide pin 96 has a guide portion 961 with a chamfered tip, and the seminal end portion is insert molded into the housing (not shown).

In such a plug-in connector, even if the package board 11 is inserted at a position slightly shifted due to the dimensional tolerance of the unit, the guide portion 961 at the tip of the guide pin 96 of the back connector 92 will fit into the guide hole 95 of the package connector 91. When the connector 93 is fitted with the connector 93, the rear connector 93, which is held floating, is guided and moved to be accurately placed in a predetermined position. That is, it moves in the surface direction of the back wiring board 12 so as to fit the package connector 91 and is positioned at a predetermined position relative to the package connector 91. When the guiding is completed, the relative positional deviation in the surface direction between the back connector 92 and the package connector 91 is approximately the same as the clearance between the guide pin 96 and the guide hole 95. By further inserting the package board 11, the tip 51 of the jack 5 of the package connector 91 and the rear connector 92
The tip of the plug 4 is connected to the plug 4 of the back connector 92.
The optical connection is achieved by fitting the tip of the

As explained in detail above, in the electrical connector, the electrical terminal 6 is fixed to the back wiring board 12, and the guide taper 83 of the /-X leg 82 connects the package and the back connector 84.
81 are aligned and then the electrical terminals 6 are contacted to implement the electrical connection. On the other hand, in the optical connector, the back connector 92 has a floating structure, and the package and the back connectors 91 and 92 are accurately aligned by the guiding action of the guide pin 96 and the floating structure of the back housing 93, and then the plug 4 and the jack 5 Optical axis alignment on the micron order is achieved by mating the two.

<Problems to be Solved by the Invention> As mentioned above, since electricity and light have different connection styles, in conventional bookshell mounting, light and electricity are provided with separate plug-in connectors, and plug-in connectors are used as needed. It was configured to use an in-optical connector and a plug-in electrical connector, respectively.

Therefore, when electrical and optical connections are made using conventional plug-in connectors, separate electrical connectors and optical connectors are mounted on a package board to connect signal connectors. For this reason, each connector requires a fixing space and an appropriate space for each connector so that they do not interfere with each other, which narrows the terminal space of the connector and limits the number of electrical terminals and plugs/jacks, making it difficult to implement efficiently. There was a drawback that it was not.

Furthermore, when there is a demand for a wide variety of terminal types and numbers, it is necessary to develop a wide variety of electrical and optical connectors, which has the disadvantage of not being able to respond flexibly to the demands.

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, an object of the present invention is to provide a plug-in connector which is a composite connector of i4Q and optical or coaxial, and which enables a specific type of connection between electricity and light.

Means for Solving the Problems> The configuration of the present invention to achieve the above object consists of a package board on which components are mounted, and a back surface provided on the back surface of a unit on which the package board is mounted in a bookshelf format. In the plug-in connector that connects to the wiring board, there is a package connector fixed to the package board,
a back connector mounted on the back wiring board; the package connector has a housing; an optical or coaxial jack held in the housing; an electrical terminal; a guide hole; and a guide taper; It has a first housing and a second housing that sandwich the wiring board from both sides, and the first housing holds an electrical terminal fixed to the back wiring board and connected to the electrical terminal of the package connector. , the second housing has a guide taper that fits with the guide taper, a guide pin through hole, and a plug through hole, and is fixed to the back wiring board, and the second housing is smaller than the plug through hole (and does not pass through the plug through hole). The fixing part has an optical or coaxial plug and a guide pin that are fitted and connected to the jack, and is fixed to the second housing, the fixing part having a smaller diameter than the ID pin hole and passing through the ID pin through hole. a floating holding part having a cylindrical part and a subsequent stepped part having a diameter larger than the guide pin through hole, and a guide part that fits into the guide hole of the package connector, and the floating holding part of the guide pin allows the first It is characterized in that it is held floating relative to the housing.

Effects> According to the present invention having the above configuration, it is possible to connect light and electricity all at once in a plug-in format in signal connections between the package board and the back wiring board of the unit.

That is, when the package board is installed in the unit, the guide portion at the tip of the guide pin of the l) housing on the floating back surface is guided and fitted into the guide hole of the package housing. As a result, the position of the rear housing is determined accurately with respect to the position of the package board, and positioning can be performed accurately to the extent that it is possible to align the center axes of the optical plug and the jack. Insert the package board and the optical plug and jack will appear, completing the connection.Furthermore, the guide taper on the front housing will fit with the guide taper on the package housing, allowing the package housing to connect to the wiring on the back side. board,
Therefore, it is positioned at an accurate position relative to the electrical terminal fixed to the rear housing. This allows the electrical terminals of the package housing and the electrical terminals of the rear wiring board front housing to be fitted together. Furthermore, by pushing the package, l! The connection is completed.

Practical example Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 shows a perspective view of an embodiment of the present invention, and FIG. 2 shows a partially sectional view. As shown in both figures, a package board 11 on which various components are mounted is mounted on the unit 1 in a bookshelf format and connected to a back wiring board 12 provided on the back side of the unit 1. The plug-in connector consists of a package connector 2 fixed to a package board 11 and a back connector 3 mounted on a back wiring board 12. Of these, the package connector 2 has a housing 21. a jack 5 held within the housing 21;
It has a female electrical terminal 7, a guide hole 22, a guide tape 23, and a guide pin storage part 25, and is fixed to the package board 11 with fixing screws 24. On the other hand, the back connector 3 has a first housing 31 and a second housing 32.
It consists of a first housing 31 and a second housing 3.
The back wiring board 12 is sandwiched between the two. Among these, the first housing 31 has an electric terminal 6, a guide taper 311, a guide pin through hole 312, and a plug through hole 121, and the electric terminal 6 is press-fitted into the first housing 31 and the back wiring board 12. By this, back side wiring board 1
It is frictionally locked to 2. In addition, the second housing 32
has a plug 4 and a guide pin 33. The plug 4 passes through the plug through hole 121 of the back wiring board 12 and the plug through hole 313 of the first housing 31, and has a tip 41 protruding. The guide pin 33 is connected to the second housing 32
It consists of a fixing part 331 fixed to the second housing 32, a floating holding part 332, and a guide part 333, and the fixing part 331 is fixed to the second housing 32. The floating holding portion 332 includes a cylindrical portion 334 having a smaller diameter than the guide pin through hole 312 of the second housing 31 and a step portion 335 having a larger diameter than the guide pin through hole 312 following the cylindrical portion 334 . This stepped portion 335 and the second housing front surface 3'21 sandwich the back wiring board 12 and the bottom surface 314 of the first housing. Since the outer diameter of the floating holding portion 332 of the guide pin 33 is smaller than the inner diameter of the guide pin through hole 312, the guide pin 33
There is a gap between the id pin through hole 312 and the id pin through hole 312. Due to this gap, the second housing 32 is held floating on the first housing 31 with a gap therebetween. Note that the stepped portion 335 has a shape such that the package housing 21 is accommodated in the idle pin storage portion 25 when the connector is fitted.

In such a plug-in connector, when inserting the package board 11 into the unit 1, the guide portion 333 at the tip of the guide pin 33 of the second housing 32 of the back connector 3 first aligns with the guide hole 22 provided in the package housing 21. They will be guided and mated together.

Even if the package board 11 is inserted at a position that is slightly shifted due to the dimensional tolerance of the unit 1, as the package board 11 is inserted, the guide pins 33 and the guide holes 22 will fit together, and the guide pins 33 will be inserted into the guide holes 22. The second housing 32, which is a floating structure whose position is regulated, moves in accordance with the arrangement of the package connector 12 to correct the positional shift. In this way, the position of the second housing 32 is determined relative to the position of the package connector 2 within a positional deviation of about the clearance between the guide pin 33 and the guide hole 22. When the package board 11 is further inserted, the guide pins 33 and the guide holes 22 are fitted, so the relative position in the surface direction of the back wiring board 12 is maintained, and then the front guide of the package connector 2 is inserted. The taper 23 is the guide tape 311 of the first housing 31
guided by.

As a result, the package connector 2 fits into the first housing 31 while adjusting the dimensional tolerance of the unit 1, and the package connector 2 and the first housing 31 are positioned.

In this way, the first housing 31 and the package connector 2 and the second housing 32 and the package connector 2 are positioned.

The plug 4 and the jack 5 are fitted together after the guide pin 33 is fitted into the guide hole 22. That is, after the guide pins 33 and the guide holes 22 are fitted, the positions of the package connector 2 and the second housing 32 are adjusted to a predetermined position (a position where the tip 51 of the jack 5 and the tip 41 of the plug 4 can fit together). ). Therefore, when the package board 11 is inserted, the plug 4 and jack 5 are fitted together, and optical connection is achieved. Further, the electrical connection is performed after the package connector 2 and the first housing 31 are guided by the guide taper 23 and the guide taper 311 and fitted together. That is, the package connector 2 and the first
After the housings 31 of
The electrical terminal 6 is positioned at a position II) such that the electrical terminal 6 can be fitted thereto. Therefore, when the package board 11 is inserted, the electrical terminals 7 of the package connector 2 and the electrical terminals 6 of the first housing 31 fit together, and electrical connection is established.

In this embodiment, the back connector 3 is assembled by using guide pins 3
3 from the front surface of the first housing 31 through the guide pin through holes 312, 122, and into the guide pin fixing hole 322 of the second housing 32, and then fixed with the guide pin fixing screw 35 on the back surface. The fixed part 331 is thinner than the floating holding part 332, and the boundary between these parts forms a stepped part 337. The rear portion of the fixing portion 331 is provided with a female thread that engages with the fixing screw 35. on the other hand,
The guide pin fixing hole 322 of the second housing 32 has an inner diameter that allows the fixing part 331 to fit therein without any gap.After inserting the guide pin 33 into the guide pin fixing hole 322, by attaching the fixing screw 35, The step portion 337 is caught on the guide pin 33 and the guide pin 33 is fixed to the second housing 32. With this structure, work such as maintenance of the second housing 32 can be performed from the back side of the back wiring board 12 without removing the package board 11 (i.e., if necessary for,
By removing the fixing screws 35, the second housing 32 can be removed from the back wiring board 12.

In the above embodiment, the guide pin 33 may be fixed using a bolt/nut type (not shown) instead of a screw type. In addition to this method, it is also possible to fix the guide pin 33 from the front surface of the first housing 31 by using the structure shown in 31g(a), for example.

FIG. 3 (al) shows a structure in which the floating holding portion 332 of the guide pin 33 is made up of a fitting FR 336 provided on the guide pin 33 and a C ring 34 (see FIG. 3 (bl)) that fits into the fitting FR 336. In this case, a guide pin 33 is insert-molded in the second housing 32, and after inserting the second housing 32 from behind the back wiring board 12, the first
Fit the C ring 34 onto the guide pin 33 from the front of the housing 31 so that it fits into the groove 336,
It becomes possible to hold the second housing 32 floating.

In the above embodiment, the fixing means for the first housing 31 is
This is achieved by frictional locking of the electrical terminals 6 press-fitted into the first housing 31 and the back wiring board 12. That is, although not shown, by making the inner diameter of the terminal hole of the first housing 31 into which the electrical terminal 6 is press-fitted and the inner diameter of the terminal hole of the back wiring board 12 slightly smaller than the diameter of the electrical terminal 6, This structure is such that the first housing 31 is fixed to the back wiring board 12 with the electrical terminals 6 press-fitted therein. Instead of press-fitting, the electrical terminals 6 may be fixed by soldering or the like. In addition to the fixing means using the electrical terminals 6, the first housing 31 may be fixed to the back wiring board 12 using screws or other fixing means, for example. FIG. 4 shows an example using another fixing means, in which a locking piece 315 is provided on a part of the first housing 31, and a protrusion 317 at the tip of the locking piece 315 holds the first housing 31. The structure is such that it is fixed to the back wiring board 12. With this structure, even when the number of electrical terminals is small, the first
It is possible to securely fix the housing 31 to the back wiring board 12.

FIG. 5 shows another embodiment of the present invention, and relates to the structure of the guide pin 33 of the second housing 32. FIG. Since the guide pin 33 is used to position the package connector 2 and the second housing 32, high fixing accuracy is required when fixing the guide pin 33 to the second housing 32. In this embodiment, the second housing 3
This figure shows a structure for fixing the guide pin 33 to the guide pin 32 with high precision. That is, the structure of the guide pin 33 is almost the same as that of the first embodiment, but the guide pin fixing hole 322 is The structure is significantly different. In the previous embodiment, the guide pin fixing hole 322 was formed by a hole directly provided in the second housing 32, but in this embodiment, the guide pin fixing hole 322 was formed by a hole directly provided in the second housing 32.
The guide pin fixing hole 322 is formed by insert molding 6 into the second housing 32. That is, the guide pin fixing hole 322 is previously provided in the insert member 36 with good precision, and the insert member 36 is insert-molded into the second housing 32 to form the guide pin fixing hole 322. housing 3
2, it becomes possible to provide the guide pin fixing hole 322 with high precision.

In addition, since the insert member 36 can be made of metal, the strength with which the guide pin 33 is attached to the second housing 32 can be increased.

FIG. 5 also shows an efficient storage structure for the stepped portion 335 of the guide pin 33. That is, the bottom surface 314 of the first housing 31 is wide enough to accommodate the stepped portion 335 of the guide pin 33 and not interfere with the stepped portion 335 due to floating of the guide pin 33, and the guide pin storage portion 318 is removed.
will be established. Floating holding part 332 of the t-kodashi guide pin 33
The length is made shorter by the depth of the guide pin storage portion 318 than the length of the floating holding portion of the first embodiment. By adopting this structure, the step storage section 25 (see FIG. 2) provided in the package housing 21 can be eliminated, and the length of the guide pin 33 can be adjusted to the length of the storage section 33.
Make it shorter by the depth of 8. Note that this structure can also be applied to the first embodiment.

<Effects of the Invention> As specifically explained above in conjunction with the embodiments, according to the present invention, the plug-in connector can be configured as a composite electrical and optical or coaxial connector. For this reason, conventionally, when connecting electrical and optical or coaxial signals on the package board to the backside wiring board, it was necessary to use two types of connectors: an electrical connector and an optical or coaxial connector. In contrast, the present invention requires only one connector.

Therefore, the housing fixing space required for each connector and the appropriate gap between connectors that do not interfere with each other can be reduced to just one connector, which allows for a wider connection space that can be used efficiently. You can increase the number. In addition, since electricity and light can be integrated into one connector, it has excellent effects such as being able to respond more flexibly to a wide variety of connection requests than when using separate connectors for each. be.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention. Figure 1 is a perspective view showing the connector of the present invention attached to a unit, and Figure 2 is a partially sectional plan view. , Figure 3 (f
il is a plan view showing a modified example of the floating TuJ structure of the second housing; FIG. 3 is a side view showing an extracted C ring; FIG. FIG. 5 is a partially sectional plan view of another embodiment illustrating a guide pin fixing structure, and FIG. 6 is a partially sectional plan view showing an example of a conventional electrical plug-in connector. 7 is a partially sectional plan view showing an example of a conventional optical plug-in connector.In the drawings, 1...unit, 11...package board, 12...back side l! i! Wire plate, 121 - Plug through hole, 122 - Guide pin storage part, 2 - Package connector, 21 - Package housing, 22 - Guide hole, 23 - Guide taper, 24 - Fixing Screw, 3. Rear connector, 31... First housing, 31 To guide taper, 312... Guide pin through hole, 313... Plug through hole, 32... Second housing, 33... Guide pin, 331... Fixed part, 332... Floating holding part, 333... Guide part, 334... Cylindrical part, 335 - Step part, 35... Fixing screw, 4... Plug, 41... Plug Tip, 5, Jack, 51, Jack tip, 98, Hole Fig. 2 Fig. 1 Fig. 4 Fig. 5

Claims (1)

[Claims] In a plug-in connector that connects a package board on which various components are mounted and a back wiring board provided on the back of a unit on which this package board is mounted in a bookshelf format, the plug-in connector is fixed to the package board. The package connector has a housing, an optical or coaxial jack held in the housing, an electrical terminal, a guide hole and a guide taper, and the package connector has a housing, an optical or coaxial jack held in the housing, a guide hole and a guide taper, and the package connector has a housing, an optical or coaxial jack held in the housing, a guide hole, and a guide taper, The connector has a first housing and a second housing that sandwich the back wiring board from both sides, and the first housing has an electrical terminal fixed to the back wiring board and connected to the electrical terminal of the package connector. and has a guide taper that fits with the guide taper, a guide pin through hole, and a plug through hole, and is fixed to the back wiring board, and the second housing is smaller than the plug through hole and has a plug through hole. a fixing part having an optical or coaxial plug and a guide pin that are fitted and connected to the jack through the hole, and a fixing part that is fixed to the second housing; A floating holding part for a guide pin, the floating holding part having a cylindrical part passing through the hole and a subsequent stepped part having a diameter larger than the guide pin through hole, and a guide part fitting into the guide hole of the package connector. A plug-in connector, wherein the plug-in connector is held floating relative to the first housing.