DE1258946B - Coaxial connector for coaxial high-frequency cables - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

HOIr

German KL: 21c - 22

Number: 1 258 946

File number: B 68390 VIII d / 21 c

Filing date: August 11, 1962

Opening day: January 18, 1968

The invention relates to a coaxial connector for coaxial high-frequency cables, in particular antenna cables, with one that surrounds the cable end and one with the inner conductor of the on its end face Cable electrically connected connector pin-bearing sleeve, which on its outside with the outer conductor of the cable has electrically connected contacts.

A coaxial connector is used when it comes to the conductors of a high frequency cable releasably to a receiving device, e.g. B. to connect to a radio or television set. During the The plug pin usually has no resilient elements and also easily with the inner conductor of the cable can be connected, the latter because the connector pin and inner conductor are centrally located, prepares there is considerable difficulty in establishing a proper electrical connection between those on the outside the sleeve located contacts and the outer conductor of the cable to produce the z. B. as Braided shielding on the insulation of the inner conductor and mostly through an outer sheath is isolated. Special considerations are required if there is also a requirement to open the contacts the outside of the sleeve for reasons of contact security to be resilient and as small as possible Get the dimensions of the connector.

Coaxial connectors are known with a sleeve made of metal, which make contact at its rear end presses on the outer conductor and on its front face an insulating ring for attaching the Connector pin carries. Here it is very unfavorable that the isolation path between the sleeve and the connector pin is relatively small, since the insulating ring is enclosed on its circumference by the sleeve. aside from that if the sleeve, which is only stuck on the outer conductor by pressure, does not establish reliable contact between Outer conductor and sleeve, since the outer conductor is on the relatively flexible insulation of the Inner conductor rests.

Another known connector is the electrical contact between the outer conductor and the sleeve made of metal produced in that hairpin-shaped contact springs with one leg between the outer conductor and the insulating outer sheath and with her other Legs are inserted between the outer surface of the outer jacket and the inner surface of the sleeve. but this, too, does not mean reliable contact, since the insulation of the Inner conductor gives way.

In order to now also work on the other, only when inserting the coaxial connector into the appropriately designed, Coaxial connector for coaxial high-frequency cables

Applicant:

Robert Bosch electronics and photo cinema
Company with limited liability,
1000 Berlin 33, Forckenbeckstrasse. 9-13

Named as inventor:
Kurt Klinkwitz, 1000 Berlin

The socket attached to the receiving device activates the contact point between the sleeve and the inner wall the socket is in perfect contact with the two previously described, known plugs in the front part of the sleeve a partially annular contact spring is provided axially parallel, which lies against the inner wall of the metal sleeve and its ends bent radially outward protrude through longitudinal slots of the sleeve to the outside and resilient contact with the socket of the receiver result. The production of this partially annular contact spring is very expensive because the Manufacturing tolerances must be kept very tight.

In a plug that has become known, the end of a coaxial cable is injection-molded from plastic Surrounding the sleeve, through the front face of the connector pin connected to the inner conductor goes through it and on the outer surface of which there are two resilient sheet metal strips. The back end this sheet metal strip is bent at right angles to the cable and is attached to the Pressed cable jacket. In doing so, pierce the provided on the end faces of the bent sheet metal strips Teeth the sheath of the cable and get in contact with the one under the sheath Outer conductor. However, the contact between the sheet metal strips and the outer conductor is not reliable, because the contact pressure to prevent damage to the outer conductor must only be low and because the back pressure only comes from the very flexible insulation between the outer conductor and inner conductor is formed. The isolation path between the connector pin and the two is also resilient Sheet metal strips that are connected at their front ends and at a small distance on the connector pin be bypassed, only to be kept high enough at the expense of the length of the connector.

709 719/321

is guided, a stiffening insert can be inserted into the hollow tube surrounding the inner conductor be inserted.

According to further features of the invention, the 5 stiffening insert can be over the rear end of the Reach out plastic body, either in its entire length or in certain longitudinal sections be permanently flexible and angled behind the plastic body, e.g. B. at right angles, bent.

You now have the option of connecting the plug with an insert lying in the axial direction of the plug to be completed and later, in the case of use, the one emerging at the rear end of the plastic body Bend cable in such a direction as it is underneath

without bending the cable exiting from the rear at all at an angle, for example around the To be able to handle the plug more conveniently.

A suitably strong wire made of copper has proven itself as an insert, which is connected to the rear end of the plastic body extending longitudinal section can be more flexible than in the area of the plastic body by z. B. in

A secure contact on the outer conductor and a sufficiently large isolation path at the point of passage of the plug pin at cheap manufacturing costs can be achieved if the coaxial plug after the proposals of the invention is formed. The invention consists in that with the outer conductor (3) connected contacts have the form of leaf springs (5) soldered to the outer conductor, which have a in a manner known per se as an injection-molded or io directly around the cable (1) and the connector pin (7) pressed plastic body (10) penetrate formed sleeve and against its outer surface are bent back in the direction of insertion.

While the previously known plug are constructed so that a connection between the 15 the present conditions is desired. Natural outer conductor and a sleeve made of metal or the Hch, you can also use the plug on the outside of an injection-molded plastic
Contacts located in the sleeve by soldering
is to be produced, according to the proposal of the invention, the contacts designed as leaf springs are on ₂ o
soldered directly to the outer conductor and go through
the plastic body through to the outside. Through this,
that the passage point for the leaf springs in
is a significant distance from the point

on which the plug pin from the plastic body 25 has remained unannealed in the area of the plastic body. emerges, is also the path of isolation between even if one of the possibility of only in

Connector pin and leaf springs large enough. Closing use case the cable in each case in the desired The connector is easy to manufacture. To bend direction, does not want to make use,

To make a particularly secure soldering on the outer conductor but already from the factory coaxial connector with angular, it is proposed that the outgoing on ₃₀ cable will provide a so-called angle plug outer conductor to be soldered leaf springs as approaches, means the proposed construction of an _eme trainees the outer conductor surrounding ring material Make cheaper compared to the previous ones. If the outer conductor is, for example, a braided shield, plugs that have become known and guarantees one, a ring pushed over it can comfortably make more secure contact on the outer conductor. In addition, and solder on properly. The leaf springs can ₃₅ falls an angle connector constructed in this way essentially z. B. emerge from the end face of the flat ring in the direction smaller than the previously known angle of the axis of the ring, then radially staked and generally satisfies the demands on him to be bent in this direction the plastic body.

penetrate and finally with the plastic _For more stable versions of angled plugs

Material body outstanding matches against the exterior _{40 w} i _r d further proposed such Konstrukfläche of the plastic body to be bent back. _t i _{on to} choose that the stiffening insert and the

A mechanical stress from the plastic body an angular, z. B. right-angled Plastic body have protruding parts of the sheet bend. Now the stiffening one is running Feather cannot be transferred to the soldering point, insert also in the area of the plastic body because the leaf springs are fixed in the plastic body with a corresponding bend, which makes the correct one are bedded. Position of the cable within the plastic body

is guaranteed even after the injection process, and is of course not over the rear end of the plastic body extended. The plastic body is extended by the portion of the bend and 50 gives the connector a more stable structure

The connector pin can expediently be anchored in the plastic body by the connector pin near its rear end has a collar around which the plastic body engages.

In order to avoid the high frequency cable, which is very flexible in most cases, during the spraying process and especially in the pressing process occupies an undesirable position by z. B. the outer conductor too tight comes to lie on the outer surface of the injection-molded plastic body 55, can after another Feature of the invention in the cable at least in the area of the plastic body, for example

the angled connector mentioned above, in which the plastic body is only over the front, straight one Section of the liner extends.

According to further features of the invention, the plug pin can be hollow, the stiffening insert up to reach into the cavity of the connector pin and, if necessary, be soldered to the connector pin. Through this the connector pin gets a particularly secure fit

wire or band-shaped, stiffening insert are located. This is easier than, as with another 60 in the plastic body, because the stiffening insert is yes known connector executed, supporting body with in predominantly runs in the cable and this in turn Provide spaced support rings that are firmly embedded in the plastic body. Hold the cable in a central position and inject it so that the inner conductor of the cable is in contact with the will. Receives plug pin, it is further proposed that preferably with low-loss coaxial high-65 the inner conductor into the cavity of the plug pin frequency cables in which the inner conductor extends inside and is soldered there. One saves solder Hollow tube with much greater loan work, if both the stiffening insert and tem cross-section than the cross-section of the inner conductor of the inner conductor to the front end of the hollow

Connector pin runs and there with a single soldering connector pin with stiffening insert as well as inner conductors are soldered.

Another electrical connection between the inner conductor and the plug pin can, for example, be in it exist that the inner conductor on the stiffening insert, preferably near its rear end, is soldered on. The front end of the stiffening liner is then at the front end of the hollow Connector pin soldered on.

To produce a connector according to the invention, according to a further feature of the invention proceed in such a way that a ring with leaf springs is soldered onto an outer conductor of a cable, wherein the leaf springs are approximately perpendicular to the central axis of the ring that a pin with a Inner conductor is electrically connected, e.g. B. is soldered that in an injection mold a the cable end together with the ring and pin enclosing plastic body is injected and that from the Plastic body protruding parts of the leaf springs against the outer surface of the plastic body be bent back against the plug direction.

After the plastic body has been completed, the leaf springs can be pressed against the outer surface of the plastic body Bend back so that they are slightly curved on the outer surface of the plastic body, like the leaf springs of a banana plug. This makes contact particularly secure achieved.

The injection or compression mold can be constructed so that the plug pin with most of its Length, the leaf springs perpendicular to the central axis of the ring and the backward one Cables are taken up by the walls of the mold. If it is a stronger one To provide the cable with a plug, so the cable will only insignificantly from his during spraying let push away the original position, especially since it is safe at its front end by the leaf springs is centered.

In the majority of cases, such as B. in the antenna cable of a vehicle antenna or a television set, a relatively thin, flexible cable must be fitted with a plug. So one of those Cable retains its position during the spraying process, you can expediently a stiffening Insert the insert into the cable and connect it to both the inner conductor and the connector pin solder.

When making the electrical connection between the inner conductor and the plug pin, you can, for example proceed in such a way that the first protruding from the front end of the cable Inner conductor near the rear end of the stiffening insert by means of a soldering point that you can solder on the front end of the insert attaches the hollow connector pin and this with the insert by means of a Solder point soldered so that the insert is pushed so far into the hollow tube surrounding the inner conductor, until the rear end of the connector pin meets the front end of the cable that you can Solder the ring on the outer conductor, that you inject the plastic body and that you finally get the Leaf springs bends back against the outer surface of the plastic body.

You can according to a further feature of the invention, the electrical connection between Also make the inner conductor and pin in such a way that you over the front of the stiffening insert together the inner conductor is the hollow connector pin and at the front end of the connector pin both the Solder the insert as well as the inner conductor.

So-called straight plugs can be produced by means of the methods described so far, in which the cable the rear end of the plastic body in a straight line on the central axis of the

ίο leaves the connector. There are many cases where there is is desirable if the cable the connector at a certain angle, preferably at a right angle leaves. In order to obtain such an angled plug, one can expediently like this method that one makes the stiffening insert from permanently flexible material and a considerable Piece longer than the distance from the front end of the connector pin to the rear The end of the plastic body corresponds to that after the electrical connection has been made Push the insert from the inner conductor to the connector pin into the cable until it has a considerable Piece protrudes beyond the area of the plastic body, and that after injection of the Plastic body the cable exiting at the rear end of the plastic body directly turns behind the plastic body at the desired angle.

According to a further proposal of the invention, you can use another, more stable angled connector Make it in such a way that you insert the initially straight insert into the cable inserts that you bend the insert together with the cable at an angle and that you finally the synthetic material body injected in an injection mold with a correspondingly curved central axis.

Further details of the invention and its mode of operation can be found with reference to the drawings explained in which embodiments of the coaxial connector according to the invention in a somewhat enlarged Scale are shown.

Fig. 1 shows a straight coaxial connector with a stiffening insert in which the plastic body is cut entirely and the cable is partially cut are;

Fig. 2 gives a view of an angled plug Again, make a straight plug by bending the over the rear end of the plastic body protruding stiffening insert is created;

F i g. Fig. 3 is a view of an angled connector formed by overmolding a previously angled Insert is made, cut part of the plastic body.

In a coaxial high-frequency cable 1 of FIG. 1, that consists of an inner conductor 8 running in a wave-like manner within an insulating hollow tube 2 a shielding braid 3 serving as an outer conductor and made up of an insulating sheath 4, a stiffening insert 9 is inserted. The insert is at its left end by means of a solder joint 25 with a hollow plug pin 7 and at its right end by means of the soldering point 18 with the inner conductor 8 electrically connected.

A flat ring 6 is located on the shielding braid 3, which has been stripped from the outer jacket at its left end soldered, the two lines of which were originally perpendicular to the central

axis of the ring standing approaches to leaf springs 5 are formed.

Immediately around the cable 1 and the plug pin 7, a plastic body 10 is injection-molded, which both the Plug pin 7 by means of a collar 16 provided on the latter and the two leaf springs 5 immovable attached to the cable.

According to FIG. 2 is a cable 22 with a initially provided straight insert 12, which together with an inner conductor 17 in one Hollow tube 21 of the cable is located. The insert and the inner conductor are by means of a common Soldering point 11 is soldered to the left end of a hollow connector pin 7. To this straight deposit ^ a plastic body 13 is injected, from which the cable 22 in the shown with dashed lines Lines shown in the direction to the right emerges, and thus a straight plug is formed. The leaf springs S are brought into the position shown in the drawing. Immediately after bending the cable behind the plastic body, the straight insert 12 becomes an angled downward one Insert 19 and the result is a curved cable 26. The one drawn with solid lines Connector of FIG. 2 is an angled plug, bent from a straight plug.

The in F i g. 3 shown angle plug is made so, that in a cable 23 an initially straight insert 14 is inserted and shared with the front end of an inner conductor 20 at the left end of a connector pin 7 by means of a Soldering point 24 is soldered. Then the cable with the insert is bent downwards at right angles, in an injection mold with a correspondingly curved central axis is inserted and a plastic body 15 injected. Leaf springs 5 initially emerging at right angles from the plastic body are shown in the drawing bent.

Claims (18)

Patent claims: 1. Coaxial connector for coaxial high-frequency cables, especially antenna cables, with a das Cable end enclosing and on its end face one electrically connected to the inner conductor of the cable connected pin-carrying sleeve, which on its outside with the outer conductor of the cable having electrically connected contacts, characterized in that the with the Outer conductor (3) connected contacts take the form of leaf springs soldered to the outer conductor (5) have the one in a manner known per se as a directly around the cable (1) and the Plug pin (7) molded or pressed plastic body (10) penetrate formed sleeve and are bent back against the outer surface against the insertion direction. 2. Coaxial connector for coaxial high-frequency cables according to claim 1, characterized in that that the leaf springs (S) soldered to the outer conductor (3) are approaches of a surrounding the outer conductor Ring (6) are. - 3. coaxial connector for coaxial high-frequency cables according to claim 1, characterized in that that the plug pin (7) near its rear end has a collar (16) around which the plastic body (10) reaching around. 4. coaxial connector for coaxial high-frequency cables according to claim 1 to 3, characterized in that that in the cable (1) at least in the area of the plastic body (10) one example wire or band-shaped stiffening insert (9) is located. 5. coaxial connector for coaxial high-frequency cables according to claim 1 to 4, characterized in that that the stiffening insert (12) over the rear end of the plastic body (13) reaches out. 6. coaxial connector for coaxial high-frequency cables according to claim 1 to 5, characterized in that that the stiffening insert (12) either in its entire length or in certain Longitudinal sections is permanently flexible. 7. coaxial connector for coaxial high-frequency cables according to claim 1 to 6, characterized in that that the stiffening insert (19) behind the plastic body (13) at an angle, for. B. right-angled, has turned. 8. coaxial connector for coaxial high-frequency cables according to claim 1 to 4, characterized in that that the stiffening insert (14) and the plastic body (15) have an angled, z. B. have a right-angled bend. 9. coaxial connector for coaxial high-frequency cables according to claim 1 to 8, characterized in that that the plug pin (7) is hollow and the stiffening insert (9) into the cavity of the Plug pin extends into it. 10. coaxial connector for coaxial high-frequency cables according to claim 1 to 9, characterized in that that the stiffening insert (9), which extends into the cavity of the connector pin (7), is optionally soldered to the connector pin. 11. coaxial connector for coaxial high-frequency cables according to claim 1 to 10, characterized in that that the inner conductor (17) is led into the cavity of the connector pin (7) and is soldered there. 12. Coaxial connector for coaxial high-frequency cables according to claim 1 to 10, characterized in that that the inner conductor (8) on the stiffening insert (9), preferably near the rear End that is soldered on. 13. A method for producing a coaxial connector according to claim 1 to 12, characterized in that that a ring (6) with leaf springs (5) is soldered onto an outer conductor (3) of a cable (1) is, the leaf springs are approximately perpendicular to the central axis of the ring that a Connector pin (7) electrically connected to an inner conductor (8), e.g. B. is soldered that in a Injection mold a plastic body enclosing the cable end with ring and plug pin (10) is injected and that the parts of the leaf springs protruding from the plastic body be bent back against the outer surface of the plastic body. 14. A method for producing a coaxial connector according to claim 1 to 13, characterized in that that a stiffening insert (9) is introduced into the cable (1) and both with the Inner conductor (8) as well as with the connector pin (7) is soldered. 15. The method according to claim 13 and 14, in particular for producing a coaxial connector according to claim 12, characterized in that the first from the front End of the cable (1) protruding inner conductor (8) near the rear end of the stiffening Insert (9) by means of a soldering point (18) soldered on that one on the front end of the insert put on the hollow plug pin (7) and solder this to the insert by means of a soldering point (25), that the insert is pushed so far into the hollow tube (2) surrounding the inner conductor, until the rear end of the connector pin hits the front end of the cable that you can use the Solder the ring (6) on the outer conductor (3) so that the plastic body (10) is injected and that finally, the leaf springs (5) are bent back against the outer surface of the plastic body. 16. The method according to claim 13 and 14, in particular for producing a coaxial connector according to claim 11, characterized in that one in the one containing the inner conductor (17) Hollow tube (21) pushes the stiffening insert (12) in, so that the front of the insert with ao together with the inner conductor the hollow connector pin (7) is inserted and at the front end of the connector pin by means of the soldering point (11) both the insert and the inner conductor are soldered on, that one solder the ring (6) on the outer conductor (3) so that the plastic body (13) is injected and that finally the leaf springs (5) are bent back against the outer surface of the plastic body. 17. The method according to claim 13 and 14, in particular for producing a coaxial connector according to claim 7, characterized in that the stiffening insert (12) is made from permanent made of flexible material and makes it considerably longer than the distance from the front end of the connector pin (7) to the rear end of the plastic body (13) corresponds to the fact that you either at the rear end of the insert the inner conductor and at the front At the end of the insert the connector pin or both the insert and the connector pin Solder the inner conductor so that the insert is pushed into the cable (22) until it has a considerable Piece protrudes beyond the area of the plastic body (13) so that the ring (6) Solder on the outer conductor (3), that the plastic body (13) is injected, that the leaf springs are (5) bends back against the outer surface of the plastic body and that you finally get the cables emerging at the rear end of the plastic body directly behind the plastic body turns at an angle. 18. The method according to claim 13 and 14, in particular a method for producing a coaxial connector according to claim 8, characterized in that either at the rear end of the insert (14) the inner conductor (20) and the connector pin (7) at the front end of the insert or both the insert and the connector pin also solder the inner conductor so that the insert (14), which is initially still running, is inserted into the cable (23) pushes in that you bend the insert together with the cable at an angle that you after Solder the ring (6) on the outer conductor (3) with the plastic body (15) in an injection mold injected accordingly curved running central axis and that one finally the leaf springs (5) bends back against the outer surface of the plastic body. Considered publications:
German utility model No. 1 837 970. 1 sheet of drawings 709 719/321 1.68 © Bundesdruckerei Berlin