JPH0110867Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Background technology and its problems] In general, various electronic devices that handle high frequency signals transmit their input signals and output signals using coaxial cables. A coaxial receptacle to which a coaxial connector is attached is provided as a signal input terminal or output terminal on a housing, chassis, panel, etc. of an electronic device. This coaxial receptacle includes a female contact to which the inner conductor of the coaxial cable is connected, and a cylindrical shell that is coaxially arranged with the female contact through an insulator and connected to the outer conductor of the coaxial cable. It has the following.

For example, as shown in FIG. 1, the coaxial receptacle 1 is attached to a panel 2 of an electronic device with a nut 3. The internal conductor 6 of the coaxial cable 5 is connected to the connection terminal 4 of the female contact of the coaxial receptacle 1 by soldering or the like. Further, a conductive connection plate 8 attached to the shell 7 of the coaxial receptacle 1 is connected to the jacket conductor 9 of the coaxial cable 5. In this way, the coaxial receptacle 1 and the coaxial cable 5 are connected to conduct high frequency signals.

By the way, when the coaxial receptacle 1 and the coaxial cable 5 are connected as described above, the connection terminal 4 of the female contact and the internal conductor 6 of the coaxial cable 5 are exposed to the atmosphere at this connection part. Therefore, this exposed portion spreads unnecessary radio waves and becomes a cause of noise. Therefore, conventionally, the connection portion between the coaxial receptacle 1 and the coaxial cable 5 is covered with a shield case 10, and the exposed portion is electrically shielded by using the shield case 10 as an external conductor. .

However, providing such a shield case 10 separately for each connection between the coaxial receptacle 1 and the coaxial cable 5 requires high manufacturing costs, and its installation is a very time-consuming task. In addition, since the portion covered by the shield case 10 cannot have a complete coaxial structure with respect to the internal conductor 6, the shield case 10
The shielding provided by this method was extremely incomplete and caused a deterioration of the characteristic impedance.

Therefore, instead of using the above-mentioned shield case 10 or the like, a coaxial receptacle in which mounting portions for coaxial connectors are provided at both ends of the coaxial receptacle in the axial direction is used. In this coaxial receptacle, two coaxial connectors are attached from both ends of the coaxial receptacle to connect the coaxial cable.

However, when such a coaxial receptacle is used, two coaxial connectors must be used for each connection of the coaxial cable, so an increase in cost for this connection cannot be avoided. In addition, when connected in this way, there are two contact parts between the female contact of the coaxial receptacle and the female contact of each of the coaxial connectors, which has the disadvantage that the contact resistance due to these contact parts increases. Ta.

[Purpose of invention]

Therefore, the present invention was proposed in view of the above-mentioned circumstances, and it is possible to reliably shield the connection between the internal conductor of the coaxial cable and the female contact, and is a low-cost coaxial cable with good impedance characteristics. The purpose is to provide a receptacle.

[Summary of the idea]

That is, in order to achieve the above-mentioned object, the coaxial receptacle of the present invention includes a cylindrical accommodating part for accommodating a cylindrical insulator with a female contact disposed and fixed at the axial center portion, and a cylindrical housing part for accommodating a cylindrical insulator with a female contact arranged and fixed at one end of the female contact. A cylindrical sleeve through which a coaxial cable connected to an internal conductor is inserted is connected, a caulked part is provided at the insertion opening end of the insulator, and a stepped part is provided on the inner wall part to engage with the insulator. The insulator is housed in the accommodation portion and fixed by caulking at the caulking portion, and the sleeve is caulked to the outer conductor of the coaxial cable.

〔Example〕

Hereinafter, one implementation of the present invention will be described with reference to FIGS. 2 to 5.

In this embodiment, as shown in FIG. 2, the coaxial receptacle 11 is a conductive female contact having contact pieces 12A and 12B into which male contacts of a small-sized coaxial connector (not shown), such as an F type, are fitted and connected. 12, a cylindrical conductive shell 13 having a connection screw portion 16 to which the cylindrical outer conductor of the coaxial connector is screwed and connected, and the female contact 12 penetrated and fixed to the shaft center portion of the female contact. a first insulator 14 for fixing the child 12 within the shell 13 and for insulating between the shell 13 and the female contact 12; a first insulator 14 that fits into the first insulator 14 and the female contact; It has a cylindrical second insulator 15 that accommodates and protects the twelve contact pieces 12A, 12B. The coaxial receptacle 11 is adapted to be attached to an outer casing panel or the like of an electronic device (not shown).

Next, the configuration of each of the above members will be explained in detail.

First, as shown in FIG. 3, inside the shell 13, a housing portion 21 for storing and holding each of the insulators 14 and 15 is formed into a large diameter hole according to the outer diameter of each of the insulators 14 and 15. It is formed. At one end of the shell 13 is the housing section 2.
1 opening is formed. A caulking portion 22 is provided at one end of the shell 13, that is, at the edge of the opening at one end of the accommodating portion 21. This caulking portion 22 is formed into a thin wall shape, and can be bent toward the inside of the housing portion 21 using a caulking tool or the like. Further, an inwardly facing engagement step portion 23 is formed at the other end of the accommodating portion 21 . The accommodating portion 21 accommodates and fixes the insulators 14 and 15 and the female contact 12 inside the shell 13 by bending the caulked portion 22.

Further, at the other end of the shell 13, a cylindrical sleeve 24 is provided to protrude in the axial direction of the shell 13. The through hole 24A of the sleeve 24 communicates with the accommodating portion 21 via the tapered hole portion 25. Further, the sleeve 24 can be plastically deformed in the radial direction by a caulking tool or the like formed into a thin wall. In addition, an outward flange portion 19 is provided in the middle of the outer peripheral wall of the shell 13 for mounting the coaxial receptacle 11 on a panel (not shown) or the like.
is provided.

Further, as shown in FIG. 4, the female contact 12
One end of this, that is, the lead piece 12 of this female contact 12
An internal conductor 27 of a coaxial cable 26 is connected to one end of C by soldering. The coaxial cable 26 has a jacket conductor 28 disposed coaxially with the inner conductor 27 for electrically shielding the inner conductor 27 . An insulator 29 is filled and interposed between the outer conductor 28 and the inner conductor 27, and the outer conductor 28
is covered with a cylindrical tube 30 made of rubber material. Further, a conductive connecting fitting 31 is connected to a portion of the jacket conductor 28 exposed from the tube 30. This connection fitting 31
is attached to the sheathed conductor 28 so as to have a slightly smaller diameter than the tube 30. The connecting fitting 31 and one end of the tube 30 are inserted into the sleeve 24 of the shell 13 as shown in FIG. 2, and are tightened and fixed in the sleeve 24 by caulking the sleeve 24. It's becoming like that.

In this embodiment, the cylindrical sleeve 24 is bent into a hexagonal shape to be caulked to the connection fitting 31 and tube 30. In addition, the coaxial cable 26
The other end is connected to a printed circuit board or the like of an electronic device (not shown).

Further, as shown in FIG. 3, the female contact 12
The other end of the lead piece 12C is a pair of contact pieces 12A, 12 to which the male contact of the coaxial connector is connected.
B is provided. These contact pieces 12A, 1
2B is bent into a U-shape with respect to the lead piece 12C, and is connected to the coaxial receptacle 11.
It extends in the axial direction. Each of the above contact pieces 12
One end of the extended side of A, 12B is bent into a protruding shape toward the inside of the U-shape, and the protruding tip elastically supports the male contact of the coaxial connector. , forming a contact surface with this male contact. Note that since each of the contact pieces 12A and 12B extends an appropriate distance from the lead piece 12C, the extended portion can elastically bend and support the male contact described above. .

Further, the lead piece 12C of the female contactor 12 is fixedly held at the axial center of the first insulator 14. This first insulator 14 has a cylindrical portion 14A having a slightly larger diameter into which the lead piece 12C is press-fitted, and the above-mentioned U-shaped structure between the lead piece 12C of the female contactor 12 and each of the contact pieces 12A and 12B. A cylindrical portion 14B having a slightly smaller diameter and a bent portion disposed therein is coaxially formed integrally with the cylindrical portion 14B. Further, the second insulator 15, which has a cylindrical cap shape and has a cover wall 15A at one end, is fitted into the first insulator 14. This second insulator 15 has the cylindrical portion 14 of the first insulator 14 inside it.
B is inserted and installed, and the other end edge of the second insulator 15 comes into contact with the side wall on the cylindrical side of the cylindrical portion 14A of the first insulator 14, so that the first insulator 1
4 and is fitted and fixed. In this way, each contact piece 12A, 1 of the female contactor 12
2B is accommodated in the second insulator 15. Further, a through hole 15a is formed in the cover wall 15A provided at one end of the second insulator 15, through which a male contact of the coaxial connector can be inserted. The through hole 15a is formed into a dish shape so as to be convenient for inserting the male contact.

Further, the diameter of the columnar portion 14A of the first insulator 14 and the outer diameter of the second insulator 15 are both formed in accordance with the inner diameter of the accommodating portion 21 of the shell 13. Therefore, the insulators 14 and 15, which have been fitted and integrated as described above, are inserted into the housing portion 21 in a tight fit, as shown in FIG. 2. Further, each of the insulators 14 and 15 includes the caulking portion 22 bent inside the housing portion 21 and the engagement step portion 23 formed inside the housing portion 21.
The housing portion 21 is held between the
It is designed to be fixedly held inside.

When storing the insulators 14, 15 and the female contact 12 in the shell 13, first, as shown in FIG. The coaxial cable 26 is inserted into the sleeve 24, and the coaxial cable 26 is inserted into each insulator 1.
4 and 15 are housed in the housing section 21. and,
As shown in FIG. 2, the side wall of the first insulator 14 on the coaxial cable 26 side is brought into contact with the engagement step 23 in the housing section 21. As shown in FIG. Next, the caulking portion 22 is attached to the second insulator 15.
The end of the lid wall 15A is pressed and caulked. In this way, each of the insulators 14 and 15 is supported by the engaging step portion 23 and the caulking portion 22, and is fixedly held within the housing portion 21, that is, the shell 13. Therefore, the first insulator 14
The female contact 12 arranged and fixed at the axial center of the shell 12 is housed within the shell 12.

Next, by caulking the sleeve 24 with a caulking tool or the like, the sleeve 24 tightens the connection fitting 31 and the coaxial cable 26,
The connecting fitting 31 and the coaxial cable 26 are crimped. In this way, the above shell 1
3 connects the sheathed conductor 28 via the connection fitting 31
It is electrically connected to the coaxial cable 26 and firmly connected to the coaxial cable 26.

In this way, the coaxial receptacle 11 of this embodiment
The integrally formed shell 13 can coaxially shield the connecting portion between the female contactor 12 and the internal conductor 27. Therefore, it is not necessary to provide a separate member to shield this connection portion, and moreover, it is possible to obtain a good characteristic impedance at this connection portion. Also,
Just by caulking the sleeve 24, the shell 1
3 and the jacket conductor 30 can be easily made, and the coaxial receptacle 11 and the coaxial cable 26 can be connected simultaneously.

[Effect of idea]

As is clear from the description of the embodiments above,
According to the coaxial receptacle of the present invention, the female contact of the coaxial receptacle and the inner conductor of the coaxial cable are connected by the integrally formed shell. parts can be coaxially shielded. Therefore, there is no need to provide a separate member for this shield, and a good characteristic impedance of the coaxial receptacle can be obtained. Furthermore, by crimping the sleeve of the shell, electrical connection between the shell and the outer conductor of the coaxial cable and mechanical connection between the coaxial receptacle and the coaxial cable can be very easily achieved.

[Brief explanation of the drawing]

Fig. 1 is a side view of essential parts showing an example of a conventional coaxial receptacle mounting structure, Fig. 2 is a partially cutaway sectional view showing an embodiment of the present invention, and Fig. 3 is a longitudinal section showing the shell of the coaxial receptacle. FIG. 4 is an enlarged perspective view showing a female contact, first and second insulators, and coaxial cables, and FIG. 5 is an exploded perspective view of the coaxial receptacle. 11...Coaxial receptacle, 12...Female contact, 13...Ciel, 21...Accommodating part, 14...
First insulator, 15... second insulator, 22... caulking part, 23... engaging step part,
24...Sleeve, 26...Coaxial cable, 28
...sheath conductor, 31 ... connection fitting, 27 ... internal conductor.

Claims (1)

[Scope of utility model registration request] A cylindrical accommodating part for accommodating a cylindrical insulator with a female contact disposed and fixed on an axial center portion, and a cylindrical sleeve into which a coaxial cable having an internal conductor connected to one end of the female contact is inserted. Installed in succession,
The opening end of the insulator for insertion is provided with a caulking portion, and the insulator is provided with a conductive shell having a stepped portion on the inner wall portion that engages with the insulator, and the insulator is accommodated in the housing portion and caulked with the caulking portion. A coaxial receptacle comprising: a coaxial receptacle that is fixed to the outer conductor of the coaxial cable;