JPH0548384Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to pin plugs and pin jacks used for electrical connections between devices, and particularly to pin plugs and pin jacks that are provided with insert members to increase mechanical strength. be.

(Prior Art) Conventionally, there has been a technology in this field as shown in FIG. The configuration will be explained below using figures.

FIG. 2 is a sectional view showing an example of the configuration of a conventional pin plug.

This pin plug has a conductive center pin 1,
It is composed of a conductive sleeve 2, a resin member 3 to which the center pin 1 and the sleeve 2 are fixed concentrically, and a metal cover 4 fixed to the resin member 3. The sleeve 2 has an annular contact portion 2a that contacts a jack or the like. In such a pin plug, there is a groove 4 on the outer periphery of the cover 4 to indicate the polarity.
A collar ring 4b is fitted into the groove 4a.

The procedure for assembling the pin plug with the above configuration will be explained.

The single core wire 5a of the cord 5 is connected to the center pin 1 by soldering or the like. The other core wire 5b of the cord 5 is connected to the sleeve 2 by soldering or the like. In this state, set it in the specified molding machine and place the center pin 1.
and sleeve 2 are fixed with resin member 3. At this time, the resin member 3 covers the coating portion of the cord 5 and is formed into a columnar shape. A cover 4 is fitted into this resin member 3. In this way, the cover 4 comes into contact with the resin member 3 on its inner surface, and is fixed integrally with the resin member 3 due to the frictional force.

(Problems to be Solved by the Invention) However, the pin plug having the above configuration has the following problems.

(1) When in use, hold the cover 4 and insert it into a pin jack, etc. At this time, since the contact portion 2a of the sleeve 2 is firmly in contact with the base of the jack or the like, a large force is required to pull it out.
However, since the cover 4 is fixed by tightening the resin member 3, if the tightening stress is exceeded, the resin member 3 may rub and the cover 4 may come off.

(2) In order to solve the problem in (1) above, the resin member 3
If a ring-shaped fixing fitting or the like is fitted into the metal cover 4 and the metal cover 4 is fixed thereon, the fixing force can be increased due to the large frictional force between the metals.
However, due to restrictions such as miniaturization of pin plugs, large fixing fittings cannot be obtained, and local distortion tends to occur in the resin member 3. As a result, the resin member 3
deteriorates, and as in the case (1) above, the resin member 3
There is a risk that the cover 4 may come off.

(3) In this type of pin plug, in order to prevent the cord 5 from breaking, it is necessary to sandwich the coated portion of the cord 5 between the resin member 3 or the cover 4. If this is done using the cover 4, the cover 4 will have to be inserted into the cord 5 in advance and assembled, which will be a hindrance to improving work efficiency.

(4) When using the color ring 4b as a polarity indicator, the steps of providing a groove 4a on the outer periphery of the cover 4 and fitting the color ring 4b are added, making it difficult to simplify the assembly work and reduce costs. do not have.

The problems with the pin plugs described above also apply to the pin jacks that are used together with the pin plugs.

The present invention provides a pin plug and a pin jack that solve the problems of the conventional pin plug and pin jack, such as insufficient mechanical strength and inefficient assembly work.

(Means for Solving the Problems) In order to solve the above problems, the first invention includes a conductive center pin to which a cord is connected, and a conductive sleeve having a cylindrical contact portion to which the cord is connected. and a pin plug comprising a resin member that inserts and fixes the center pin into a contact portion of the sleeve, and a metal cover that covers the resin member, the first insert engaging portion being inserted into the contact portion of the resin member. A second insert engaging portion is formed on the inner surface of the cover. moreover,
a first engaging part that engages with the first insert engaging part; a second engaging part that engages with the second insert engaging part; a holding part that holds the cord; and an end of the cover. A cylindrical two-part insert member having a cylindrical structure and a flange portion exposed from the flange portion is attached to the resin member.

The second device includes a conductive jack contact portion to which the cord is connected, a conductive cap having a cylindrical contact portion to which the cord is contacted, and the jack contact portion is placed inside the contact portion of the cap. In a pin jack including a resin member to be fixed and a metal cover covering the resin member, a first insert engaging portion is formed on an outer surface of the resin member, and a second insert engaging portion is formed on an outer surface of the resin member. It is formed on the inner surface of the cover. Furthermore, a first engaging part that engages with the first insert engaging part, a second engaging part that engages with the second insert engaging part, a clamping part that clamps the cord, and the cover. A cylindrical insert member having a two-part structure and having a flange exposed from an end thereof is attached to the resin member.

(Function) According to the first invention, since the pin plug is configured as described above, the first insert engaging portion of the resin member engages with the first engaging portion of the insert member,
An insert engaging portion of the cover engages a second engaging portion of the insert member. In this state, the insert member is externally fitted onto the resin member, and the cover is externally fitted onto the insert member to be fixed and integrated. At this time, no distortion such as deformation occurs in the first engaging portion of the insert member and the first insert engaging portion of the resin member. Furthermore, the second engaging portion of the insert member engages with the insert engaging portion of the cover, and the rigidity of the metal of the cover can be utilized for the mechanical strength of the pin plug. That is, in such a pin plug, during use, the large force applied to the center pin or sleeve when inserted into or removed from the pin jack, etc. is caused by the resin member, insert member,
and the respective engaging portions formed on the cover, thereby increasing its mechanical strength.

According to the pin jack of the second invention, when it is used against a pin plug etc., the large force applied to the jack contact part or the cap when pulling it out from the pin plug etc. Since it is dispersed in the respective engaging portions formed on the insert member and the cover, its mechanical strength is increased.

Therefore, the above problem can be solved.

(Example) Fig. 1 is an exploded perspective view of a pin plug showing a first embodiment of the present invention, Fig. 3 is a side view of the assembly of the resin member and insert member shown in Fig. FIG. 3 is a cross-sectional view of the pin plug shown in the figure.

This pin plug has a conductive center pin 10
, a conductive sleeve 20 , and the center pin 10
and an insulating resin member 30 to which the sleeve 20 is concentrically fixed, a metal cover 40, and a resin insert member 60 having a split structure that fits on the outside of the resin member 30. Ru.

The center pin 10 has a locking protrusion 11 and is rod-shaped. The front part of this locking protrusion 11 is a conductive part 10
a, the rear part is the connecting part 10b.

The sleeve 20 has an annular contact part 20a that contacts a pin plug or the like at one end, and a cord clamping part 20b at the other end, and the contact part 20a and the cord clamping part 20b are connected by a support piece 20c. has been done.

The resin member 30 fixes the base of the center pin 10 and the support piece 20c of the sleeve 20, and is formed into a columnar shape having the same diameter as the contact portion 20a. This resin member 30 is formed with a circular groove 31 and an annular groove 32, which are first insert engaging portions. The circular groove 31 is connected to the connecting portion 10 of the center pin 20.
They are provided on both sides of the resin member 30 so that b is exposed. On the other hand, the annular groove 32 is provided along the outer periphery of the resin member 30 behind the circular groove 31 . Note that one of the circular grooves 31 has a
Four guide grooves 33 that are continuous with the annular groove 32 are formed along the longitudinal direction of the resin member 30.

The cover 40 has a cylindrical shape, and an annular recess 41, which is a second insert engaging portion, is formed along the inner circumference of the through hole.

The insert member 60 is a cylindrical body having a split structure, and is composed of insert members 60a and 60b. Each insert member 60a, 6
0b has a circular inner protrusion 6 which is the first engaging part.
1 and a band-shaped inner protrusion 62 are formed.
The inner protrusion 61 and the inner protrusion 62 fit into the circular groove 31 and the annular groove 32 of the resin member 30, respectively. Further, a rectangular outer protrusion 63, which is a second engaging portion, is formed. This outward projection 6
3 fits into the annular recess 41 of the cover 40.

At the rear of the insert members 60a and 60b, there is a cord clamping part 64 that clamps the covered portion of the cord 50.
and a flange 65 that is exposed when the cover 40 is fitted and displays the molding color. Further, on the divided end surfaces of the insert members 60a and 60b, a pair of convex and concave connectors 66 and 67 are provided.
is formed. This zygote 66 and zygote 67
By fitting the insert member 6
0 are integrally joined.

In FIG. 1, 50 is a cord, this cord 50 is held between the cord holding part 20b of the sleeve 20, one shield wire 50a of the cord 50 is held at this cord holding part 20b, and the other core wire 50b is made of resin. Center pin 10 via guide groove 33 of member 30
They are connected to the sides of each by spot welding, etc.

Assembling the pin plug with the above configuration and code 50
The connection is made as follows.

That is, after inserting the center pin 10 into the contact portion 20a of the sleeve 20 and positioning the locking protrusion 11 of the center pin 10 on the support piece 20c of the sleeve 20, the locking protrusion 11 of the center pin 10 and the support piece 20
c is fixed with resin in a columnar shape with the same diameter as the contact portion 20a of the sleeve 20. During this resin molding,
A circular groove 31, an annular groove 32, and a guide groove 33 are formed at the same time. Next, the cord 50 is inserted into the sleeve 20.
The cord 50 is held by the cord holding part 20b, and one shielded wire 50a of the cord 50 is held by the cord holding part 20b.
The other core wire 50b is connected to the center pin 1 through the guide groove 33 by spot welding or the like.
It is connected to the side surface of the connecting portion 10b of 0 by spot welding or the like.

Next, one insert member 60a is inserted into the resin member 3 with its inner protrusion 61 and inner protrusion 62.
Fits into the circular groove 31 and annular groove 32 of 0, respectively,
The cord 50 is applied to the cord clamping part 64. Then, the other insert member 60b is joined to the insert member 60a already attached to the resin member 30 by aligning the connectors 66 and 67 thereof.

The insert member 6 that has become cylindrical in this way
0, when the cover 50 is pushed up to the flange 65, the rectangular outer protrusion 63 of the insert member 60
The inner recess 41 of the cover 40 is fitted into the cover 40, and the assembly is completed. In this state, the flange portion 65 is exposed and displays the molding color.

Note that this disassembly of the pin plug is performed in the reverse order of the above order.

The pin plug described above has the following functions.

() The insert members 60a and 60b are joined by fitting the inner protrusion 61 and the inner protrusion 62 into the circular groove 31 and the annular groove 32 of the resin member 30, respectively. As a result, the resin member 30,
and the insert 60 has circumferential rotational displacement;
Both axial displacements are suppressed.

() With the insert members 60a, 60b joined, the outer projections 63 of the insert members 60a, 60b fit into the annular recess 41 of the cover 40, and the cover 40 fits onto the insert member 60. At this time, the inner protrusion 61 and the inner protrusion 62, which are the first engaging parts of the insert member, and the circular groove 31 and the annular groove 32, which are the first insert engaging part of the resin member 30, are subject to deformation or the like. No distortion occurs.

This first embodiment has the following advantages.

(A) Mechanical strength is obtained after assembly. Therefore, there is no risk that the cover 40 will come off during use.

(B) Since the cord clamping portion 64 is provided on the insert member 60, the area for clamping the covered portion of the cord 50 can be increased. Therefore, breakage of the cord 50 can be prevented.

(C) Since the insert member 60 is provided with the flange portion 65 that blocks the cover 40, the molding color is displayed when the cover 40 is fitted onto the outside. The molding color of this resin can be confirmed as a polarity indicator. This eliminates the need for coloring to indicate polarity,
The number of parts can be reduced and costs can be reduced.

(D) Since the insert member 60 has a two-part structure, and the connectors 66 and 67 are formed on the end faces of each division, when attached to the resin member 30,
The fitting is performed accurately. By fitting the cover 40 into the insert member 60, assembly is easily performed.

(E) Even if the insert member 60 is made of resin, the mechanical strength will not be impaired. Also,
Even if the insert member 60 has a complicated shape,
Can be manufactured cheaply.

Fig. 5 is an exploded perspective view of the pin jack showing the first embodiment of the present invention, Fig. 6 is a side view of the assembly of the resin member and insert member shown in Fig. 5, and Fig. 7 is an exploded perspective view of the pin jack shown in Fig. 5. FIG. Note that common elements with the first embodiment are given the same reference numerals.

This pin jack includes a conductive jack contact portion 70, a conductive cap 80, and a resin member 9 for fixing the jack contact portion 70 inside the cap 80.
0 and a metal cover 40. Furthermore, a split resin insert member 60 that fits on the outside of the resin member 90 is provided. Note that the insert member 60 and cover 40 are substantially the same as in the case of the pin plug of the first embodiment.

The jack contact portion 70 connects to the base 8 through the collar.
0, and a connecting portion 7 is connected to the rear of the conductive portion 70a.
0b is extended.

The cap 80 has a cylindrical contact portion 80a that contacts a sleeve such as a pin plug at one end, and a cord clamping portion 80b at the other end. They are connected together.

The resin member 90 fixes the base of the jack contact portion 70 and the support piece 80c of the base 80, and is formed into a columnar shape. This resin member 90 is a first insert engaging portion. A circular groove 91 and an annular groove 92 are formed. The circular grooves 91 are provided on both sides of the resin member 90 . On the other hand, the annular groove 92 is provided along the outer periphery of the resin member 90 behind the circular groove 91 .

The cord 50 in FIG. 5 is clamped between the cord clamping part 80b of the base 80, one shield wire 50a of the cord 50 is clamped by the cord clamping part 80b, and the other core wire 50b is clamped by the connecting part 70 of the jack contact part 70.
b, respectively, by spot welding or the like.

The assembly of this pin plug is almost the same as that of the pin plug of the first embodiment.

According to the pin jack described above, it has the following functions.

(1) The insert members 60a and 60b have their inner protrusions 61 and 62 connected to the resin member 90.
They are joined by fitting into the circular groove 91 and the annular groove 92, respectively. As a result, the resin member 90 and the insert member 60 undergo rotational displacement in the circumferential direction,
Both axial displacements are suppressed.

(2) In a state where the insert members 60a, 60b are joined, the outer protrusion 63 of the insert members 60a, 60b fits into the annular recess 41 of the cover 40, and the cover 40 fits onto the insert member 60. At this time, the inner protrusion 61 and the inner protrusion 62 which are the first engagement parts of the insert member and the circular groove 91 and the annular groove 92 which are the first insert engagement part of the resin member 90 are not affected by deformation or the like. No distortion occurs.

This second embodiment has the following advantages.

(a) This embodiment has almost the same advantages as the advantages (A) to (E) of the first embodiment.

(b) By using it together with the pin plug of the first embodiment, the mechanical strength during connection is increased;
Increases durability.

Note that the present invention is not limited to the illustrated embodiment,
Various modifications are possible. As a variation example,
For example:

() The first insert engaging portion is the resin member 3
In place of the zero circular groove 31 and annular groove 32, other shapes may be used, and the first engaging portion of the insert member 60 can be shaped accordingly.

() The number of joints 67 of the insert members 60a and 60b may be two instead of three.

() Cord holding part 64 of insert member 60
The cord 50 can also be held by providing a plurality of annular or other inward protrusions on its inner surface.

(Effects of the invention) As explained in detail above, according to the first invention, since the insert member is attached,
The pin plug was assembled correctly, and
The effect of increasing mechanical strength can be expected.

According to the second invention, it can be further expected that the connection will be made more reliably.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a pin plug showing the first embodiment of the present invention, Fig. 2 is a sectional view showing an example of the configuration of a conventional pin plug, and Fig. 3 shows the resin member and insert member shown in Fig. 1. A side view of the assembly, Figure 4 is the 1st
The cross-sectional view of the pin plug shown in Fig. 5 is the second one of the present invention.
6th exploded perspective view of the pin jack showing the embodiment of
This figure is a side view of the assembly of the resin member and insert member shown in FIG. 5, and FIG. 7 is a sectional view of the pin jack shown in FIG. 5. 10... Center pin, 20... Sleeve, 30
...Resin member, 40...Cover, 31, 32...
First insert engaging part, 41... Second insert engaging part, 61, 62... First engaging part, 63
...Second engaging portion, 64...Cord clamping portion, 65
... Flange portion, 60 ... Insert member, 70 ... Jack contact portion, 80 ... Mouthpiece.

Claims (1)

[Claims for Utility Model Registration] 1. A conductive center pin to which a cord is connected; a conductive sleeve to which the cord is connected and has a cylindrical contact portion; In a pin plug including a resin member to be fixed and a metal cover covering the resin member, a first insert engaging portion is formed on an outer surface of the resin member, and a second insert engaging portion is formed on an outer surface of the resin member. a first plate formed on an inner surface of the cover and engaged with the first insert engagement portion;
a second engaging part that engages with the second insert engaging part, a clamping part that clamps the cord, and a flange exposed from the end of the cover, and has a cylindrical shape. A pin plug characterized in that an insert member having a two-part structure is attached to the resin member. 2: a conductive jack contact portion to which a cord is connected; a conductive base having a cylindrical contact portion to which the cord is connected; a resin member that fixes the jack contact portion to the inside of the contact portion; A pin jack includes a metal cover that covers a resin member, a first insert engaging portion being formed on an outer surface of the resin member, and a second insert engaging portion being formed on an inner surface of the cover. , a first insert engaging portion that engages with the first insert engaging portion;
a second engaging part that engages with the second insert engaging part, a clamping part that clamps the cord, and a flange exposed from the end of the cover, and has a cylindrical shape. A pin jack, characterized in that an insert member having a two-part structure is attached to the resin member.