JPH0112385Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connector having one ground conductor and two signal contacts, and is used, for example, in a connector for stereo audio equipment.

In this type of connector, when inserting the plug,
If the plug can be inserted only at a certain angle with respect to the axis of the plug, the connection operation is inconvenient, and it is desired to be able to connect the plug correctly at any angle with respect to the axis of the plug. In addition, even if these parts are bent at the joint in the joined state, so-called prying, it is mechanically strong against it.
Moreover, there is no risk of a short circuit between the ground and the signal contact, and moreover, when connecting with a plug, it is desirable that the ground contacts first and then the contacts contact.

The object of this invention is to provide a connector that satisfies these requirements.

Hereinafter, embodiments of the connector according to this invention will be described with reference to the drawings. 1 to 5 show an example of a connector according to this invention. In this invention, a cylindrical metal body 11 for grounding is provided, and an insulator 12 is fitted and held within this cylindrical metal body 11. The insertion end side of the cylindrical metal body 11 is bent slightly inward to form a collar 13.
Correspondingly, the outer peripheral edge of the front end of the insulator 12 is cut into a ring shape. At the rear end of the cylindrical metal body 11, a pair of terminals 14a and 14b are integrally extended rearward to face each other. The insulator 12 protrudes beyond the cylindrical metal body 11 at the outer circumference of the rear end, and a collar 15 is integrally formed on the outer circumferential surface of the protruding portion. The brim 15 is the ground terminal 14a, 14
The lead-out portion of b is extended to the outside. For example, four punches 16 are formed on the circumferential surface of the cylindrical metal body 11 against the insulator 12 at equal angular intervals, so that the cylindrical metal body 11 and the insulator 12 are mechanically integrated. A ring-shaped recess 17 is formed on the outer peripheral surface of the cylindrical metal body 11 at an intermediate position in the axial direction, and serves as an engaging portion for a mating plug.

A center hole 18 is formed through the insulator 12 at the axial center position, and communicates with the center hole 18 and is cut in mutually opposite directions with respect to the center axis to form a first contact receiving portion 19 as shown in FIG. It is configured as shown in .
This contact accommodating portion 19 does not reach its front end, that is, its insertion end. Further, this contact housing part 19 and a notch are formed outside the housing part 19 on opposite sides of the center hole 18 at positions 90 degrees apart from the center hole 18 in terms of angle, thereby forming a second contact housing. A section 21 is configured. A ring-shaped hole 22 is formed concentrically with the center hole 18 from the insertion end surface by communicating the second contact accommodating portion 21 and a portion thereof on the outside. A contact of a mating plug is inserted into the ring-shaped hole 22.

The first contact 23 is accommodated in the first contact accommodating portion 19 of the insulator 12 . The first contact 23 has a U-shape as shown in FIG.
Parts of a and 23b are located within the center hole 18. Further, a terminal 24 protrudes from the middle of the portion connecting the legs on the side opposite to the contact portions 23a, 23b, and the contact 23 is made by punching a metal plate, for example.

The second contact 2 is placed in the second contact accommodating portion 21.
6 is accommodated. As shown in FIG. 6, the second contact 26 has a pair of opposing contact pieces 27a,
27b, the outer sides of one end of the contact pieces 27a and 27b are used as contact parts 26a and 26b, and the other ends are connected to each other by a connecting piece 28, and the connecting piece 28 is formed in a semicircular shape. A terminal 29 is integrally formed in the intermediate portion of the connecting piece 28 on the side opposite to the contact pieces 27a, 27b. This second
The contact 26 is also formed by bending a metal plate. The contact pieces 27a and 27b of the second contact 26 are respectively accommodated in a pair of notches of the contact accommodating portion 21, and the contact portion 27
a and 26b are partially disposed within the ring-shaped hole 22. A recess 31 into which the connecting portion 28 of the second contact 26 is fitted is formed on the back surface of the insulator 12 . As shown in FIG. 5, the contact portions 23a, 23b of the first contact and the contact portions 26a, 26b of the second contact are located at the same position in the axial direction with respect to the cylindrical metal body 11.

Examples of plugs to be coupled with this connector will be described with reference to FIGS. 7 to 10. A body 36 made of an insulating material is fitted and held at the rear end of the metal cylinder 35 . A pin contact 37 is set up in the center of the body 36 made of insulating material, that is, the pin contact 37 is located at the axial center position of the metal cylinder 35, and a cylindrical contact 38 is located between the pin contact 37 and the metal cylinder 35. is held coaxially with the body 36. A guide 39 is fixed concentrically on the outside of the metal cylinder 35. Splits 41a and 41b are formed facing each other on the insertion side portion of the metal cylinder 35, and their insertion ends are close to each other so that their inner diameters are close to each other. The guide 39 is for preventing deformation and is made of a metal material, and a small distance is provided between the guide 39 and the metal cylinder 35 at the insertion end side.

A terminal portion 42 integrally projects from the rear end of the body 35 in a substantially semi-cylindrical shape, and a pin contact 37 is extended rearward and led out as a terminal 43 at the center of the cylinder of the terminal portion 42. One half of the cylindrical contact 38 is extended rearward to form a terminal 44, and the protruding length of the terminal 44 is made shorter than that of the terminal 43, and the insulating material of the terminal portion 42 is filled between these terminals 44 and 43. ing. Also, terminal 44
has a semi-cylindrical shape, and a portion of the end thereof is bent inward to form a recess 44a that facilitates soldering.

Similarly, the metal cylinder 35 is also extended rearward in a semi-cylindrical shape, and the earth terminal 4 is joined to the outer peripheral surface of the terminal portion 42.
It is considered to be 5. Parts of the semi-cylindrical inner sides of the ground terminal 45 are cut and raised to form claws 46a, 46b, and the claws 46a, 46b are inserted into the notches of the terminal portion 42 to connect the body 36 and the terminal portion 42. The metal cylinder 35 and the ground terminal 45 are mechanically fixed to each other. Tightening pieces 47a and 47b are further led out to the rear from the rear end of the ground terminal 45, facing each other. For example, as shown in FIG.
The cord 48 is mechanically fixed to the ground terminal 45 by tightening the outer periphery of one end with the tightening pieces 47a and 47b, and the lead wire 4 inside the cord 48 is fixed mechanically to the ground terminal 45.
9 and 51 are soldered to the terminals 43 and 44, respectively, and the ground wire 52 is soldered to the terminal 45.

To connect the connector according to the invention shown in FIGS. 1 to 6 to this plug, the cylindrical metal body 11 is fitted into the metal cylinder 35. At this time, the metal cylinder 35 elastically contacts the cylindrical metal body 11 from its outer peripheral surface, the ground conductors are connected to each other, and the pin contact 37 is connected to the first contact 2.
The cylindrical contact 38 is press-fitted between the contact portions 23a and 23b of the third contact portion 3, that is, it contacts the contact 23 through the center hole 18, and the cylindrical contact 38 is pressed into contact with the second contact portion 23 through the ring-shaped hole 22.
The signal contact is connected by elastically contacting the outside of the contact portions 26a and 26b of the contact 26.

In this case, the metal cylinder 35 of the plug also has contact 3.
The contacts 7 and 38 protrude beyond the body 36, and the contacts 37 and 38 are located at the same position in the axial direction. Therefore, in this connection, the metal cylinder 35 and the cylindrical metal body 11 first come into contact,
That is, the ground contacts first come into contact with each other, and then the first contact 23 and the pin contact 37 and the second contact 26 and the cylindrical contact 38 contact each other simultaneously.

Since the ground conductor is coupled first in this way, no noise is generated in the connection of the contact, which is the signal line. Moreover, in this example, the first and second contacts for the two signal lines contact the contacts of the plug at the same time, and for example, in a connector for stereo earphones, stereo headphone, etc., the left and right signals are connected at the same time.
There is no possibility that only one side will work.

Furthermore, in this coupled state, the insulator 12 is interposed between the contacts 23 and 26, and is also interposed between the cylindrical metal body 11, so there is no risk of short-circuiting between them. This means that there is no risk that the connected circuit will be damaged by such a short circuit.

Furthermore, the plug has a pin-shaped contact 37 at its center.
A cylindrical contact 38 is provided for the
It is only necessary to insert these into the center hole 18 and the ring-shaped hole 22, and they can be connected at any angle of 360° with respect to the axis, without having to fix the insertion angle. It is extremely convenient to handle.

A ring-shaped protrusion 53 is formed on the inner circumferential surface of the metal cylinder 35 of the plug in relation to the recess 17 of the cylindrical metal body 11, and the coupling between the protrusion 53 and the recess 17 allows the plug and connector to The bond is maintained, and it also feels good when inserted. Furthermore, when a force that bends the shaft center is applied in the connected state, the guide 39 protects the shaft and is strong against prying.

11 to 14 show other examples of the connector according to this invention, and in this embodiment, the first
The contact housing portion 19 is inserted into the center hole 18 of the insulator 12.
At the same time, the second
The contact accommodating portion 22 is provided in communication with the center hole 18 on the insertion end side of the first contact accommodating portion 19 . Contact portions 23a, 2 of the first contact 23 accommodated in the first contact accommodating portion 19
3b, the second contact accommodated in the second contact
The contact portions 26a, 26b of the contact 26 are located on the insertion end side, and the radius of the center hole 18 is expanded in the portion where the contact portions 26a, 26b of the second contact are located, resulting in an enlarged center hole 18'. It is said that This enlarged center hole 18' on the insertion end side
Contact portions 26a and 26b of the second contacts are partially disposed inside. Note that, so that the first contact 23 does not come into contact with the connecting portion 28 of the second contact 26, the rear end portion is shifted to the side opposite to the axis with respect to the connecting portion 28.

The plug for this embodiment is shown in FIG. 15 with the same reference numerals attached to the parts corresponding to those of the plug described above, but in this example, the pin contact is in contact with the first contact of the connector on the central axis of the metal cylinder 35. 37 extends close to the insertion end, while the cylindrical contact 38 is formed to be recessed from the insertion end than the pin contact 37, and this cylindrical contact 38 is formed closer to the second contact 2.
It is press-fitted into contact between the contact portions 26a and 26b of No. 6, and has an outer diameter approximately equal to the inner diameter of the enlarged center hole 18' of the connector. An insulating material extending from the body 36 is interposed between these contacts 37 and 38.

Center pin contact 37 and cylindrical contact 3
The distance between the tips in the axial direction with respect to the first contact 23 and the second contact 23 in FIGS. 12 and 13 is
By making the spacing in the axial direction between the contact portions with the contacts 26 substantially equal to each other, when these connectors and plugs are connected to each other, the cylindrical metal body 11 is inserted into the metal cylinder 35 and the cylindrical metal body 11 is first inserted into the metal cylinder 35. are brought into contact, and then the contact portion 23a of the first contact,
23b, and at the same time the cylindrical contact 38 is inserted into the second contact 26.
It is inserted between a and 26b and they are brought into contact almost simultaneously. In this case as well, substantially the same effect as in the previous case can be obtained, and there is no fear that the contacts 37 and 38 will shoot each other due to the insulating material between them in their coupled state.

In the above description, a ring-shaped protrusion may be formed on the outer peripheral surface of the cylindrical metal body 11, and a ring-shaped recess that engages with the metal cylinder 35 of the plug may be formed.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of the connector according to this invention, Fig. 2 is a right side view of Fig. 1, Fig. 3 is a left side view of Fig. 1, and Fig. 4 is A-A of Fig. 3. 5 is a sectional view taken along line B-B in FIG. 3, FIG. 6 is a perspective view showing the second contact 26, and FIG.
FIG.
The bottom view of the figure, Figure 9 is the left side view of Figure 7, and Figure 10 is the left side view of Figure 7.
The figure is a right side view of FIG. 7, FIG. 11 is a front view showing another example of the connector according to this invention, FIG. 12 is a sectional view taken along the line C--C of FIG. 11, and FIG. DD line sectional view, Figure 14 is the same as Figures 11 to 13.
FIG. 15 is a schematic perspective view of the illustrated embodiment, and FIG. 15 is a front view with the upper half sectioned away, showing an example of a plug coupled to the second embodiment. 11...Cylindrical metal body, 12...Cylindrical insulator, 1
8... Center hole, 19... First contact housing part,
21...Second contact accommodating portion, 23...First contact, 26...Second contact.

Claims (1)

[Scope of utility model registration request] A cylindrical conductor for grounding, an insulator fitted and held within the cylindrical conductor, and a first contact housing formed by being cut in the radial direction and connected to the center hole formed in the insulator. a first contact having a pair of contact portions held in the first contact accommodating portion so as to be sandwiched with respect to the center hole; a second contact accommodating portion formed by radial notches spaced apart by 90 degrees from each other; A connector comprising a second contact having a contact portion.