JP3317683B2 - Coaxial multipole plug and method of assembling and forming coaxial multipole plug - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-headed plug or a coaxial multi-pole type in which a first pole is provided at the tip of a body formed into a shaft and a second pole and a third pole are provided on the peripheral surface of the body. It relates to the improvement of the pole plug.

[0002]

2. Description of the Related Art As shown in FIGS. 1 and 2, a single-headed plug or a coaxial multi-pole plug of the above-mentioned type is usually a rear end of a head 1 made of a metal material at a front end serving as a contact terminal of an inner pole. A center pin 10 extending rearward from a shaft portion of the center pin, a metal outer sleeve 2 serving as a ground pole is coaxially arranged and fitted around the center pin 10, Between the outer sleeve 2 and the center pin 10,
An intermediate sleeve 3 made of a metal material having a diameter smaller than that of the outer cylinder sleeve 2 is coaxially arranged and fitted on the center pin 10, and the front end of the intermediate sleeve 3 has an outer diameter of the outer cylinder sleeve 2. The center pin 10 is formed between the front end of the outer sleeve 2 and the head 1 so as to have substantially the same diameter.
And is integrally or integrally connected to a metal ring 30 serving as a first outer pole, and set in a mold in this state. The first outer electrode and the ground electrode are assembled by connecting them integrally by the resin material p while insulated by the resin material p.

[0003]

The coaxial multipolar plug A of this embodiment is basically a three-pole type shown in FIGS. The metal ring 30 serving as a pole and the intermediate sleeve 3 serving as a connection terminal piece for the pole are removed, and the head 1 of the inner pole and the outer sleeve 2 are removed.
Is a two-pole type that is a contact pole, and the standard that is made is up to three poles in the normally used 2.5φ standard, with four poles and five poles with more poles than this There is no.

This is because, in order to increase the number of poles, an intermediate sleeve made of a metal material is multiplexed and inserted between the center pin and the outer sleeve inserted around the center pin. In this case, in the three-pole coaxial multipole plug shown in FIGS. 1 and 2, an intermediate sleeve 3 serving as a connection terminal piece of a first outer pole and an outer sleeve 2 made of a metal material serving as a ground pole are provided. And another metal sleeve to be used as a connection terminal piece of a metal ring serving as a second outer pole must be inserted between them. Therefore, insert molding with a resin material of an insulating material is required. It is difficult to set the mold in the mold, and the distance between the coaxially multiplexed sleeves becomes narrow, so that the flow of the resin material to be injected becomes worse, making molding with the resin material difficult, and Set in the mold The slight misalignment of the sleeves caused by the pressure and the slight movement of the sleeves caused by the pressure of the resin material during injection causes the thickness of the space layer between the nested sleeves to become uneven. This is because it is said that it is difficult to actually manufacture the resin material because the thickness of the resin material filled into the resin becomes uneven, resulting in a product with poor insulation.

An object of the present invention is to solve the above-mentioned problem which occurs when the coaxial multipole plug is formed into a multipole type having four or more poles, and to make it difficult to set the coaxial plug having four or more poles in a mold. And a new means for assembling and manufacturing the resin material by accurately injecting the resin material under pressure and ensuring the insulation of each electrode by the injected resin material. The purpose is to:

[0006]

Means for Solving the Problems In the present invention, as a means for achieving this object, a first outer peripheral side of a body between a head serving as an inner pole and an outer cylinder sleeve serving as a ground pole is provided.・ Second: A connection terminal piece to be connected to a metal ring arranged in parallel in the front-rear direction as an n-th outer pole is coaxially inserted into the outer peripheral surface of the center pin connected to the head and the outer periphery thereof. An intermediate sleeve that is coaxially arranged with respect to the center pin is formed in the middle of the outer peripheral sleeve that is divided into a plurality of intermediate sleeves in the circumferential direction, and the split intermediate sleeve-shaped connection terminal is formed. At the front end of each of the pieces, a metal ring disposed in parallel with the outer peripheral surface of the body as the first, second,... Crank shape on the side Forming a bent locking portion that bends, these divided intermediate sleeve-shaped connection terminal pieces are formed in a ring shape in an axial view between the outer surface of the center pin and the inner surface of the outer cylinder sleeve at intervals in the circumferential direction. Coordinate to align,
In this state, a means is set in a mold, and molded with a resin material to be injected into the mold to assemble a coaxial multipolar plug.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A coaxial multipolar plug according to the present invention is characterized in that an outer cylinder sleeve serving as a grounding electrode is provided on the outer periphery of a center pin connected to a rear end side of a head serving as an inner pole as a connecting terminal piece thereof. The connection terminal piece is arranged between the inner peripheral surface of the outer sleeve and the outer peripheral surface of the center pin, and the front end side of the connection terminal piece is disposed between the inner peripheral surface of the outer sleeve and the outer peripheral surface of the center pin. Connect to the metal ring as the outer pole of 1 and set it in a mold in this state, mold it integrally by injection of resin material into the mold and assemble it into a coaxial multipole plug Is the same as the conventional three-pole coaxial multipole plug, but the connection terminal piece of the above-described metal ring arranged between the inner peripheral surface of the outer sleeve and the outer peripheral surface of the center pin is Intermediate switch used as the outer pole connection terminal piece in the coaxial plug The chromatography Bed, in the circumferential direction to form a shape divided intermediate sleeve divided into a plurality. The mode of division at this time is based on three poles, and then, according to the number of poles to be increased to quadrupole and quintuple poles, the number of poles to be added is incremented by 1 to divide the number. An intermediate sleeve-shaped connecting terminal piece is formed.

That is, when assembling a four-pole coaxial multipole plug, the three-pole coaxial multipole plug is arranged between the inner peripheral surface of the outer cylinder sleeve and the outer peripheral surface of the center pin. The intermediate sleeve is divided into two parts in the circumferential direction, and the width of the divided intermediate sleeve-shaped connecting terminal piece formed in the circumferential direction is set to half of the outer circumference of the intermediate sleeve. Is formed to be shorter than the length of the three-pole coaxial multipole plug, so that it can be disposed so as to face a pair in the front-rear direction at the position where the intermediate sleeve is disposed, and
At that time, a predetermined interval is formed between them in the circumferential direction.

When assembling into a five-pole coaxial multipole plug, the above-mentioned intermediate sleeve is divided into three parts in the circumferential direction to form three divided intermediate sleeve-shaped connection terminal pieces. The width in the circumferential direction of the connection terminal strip is shorter than one-third of the circumferential length of the peripheral wall of the intermediate sleeve, and is arranged at approximately three equal positions in the position where the intermediate sleeve is disposed when viewed in the front-rear direction. When arranged in such a manner, a predetermined interval is formed between them in the circumferential direction.

[0010] The connection terminal pieces in the form of divided intermediate sleeves formed in this manner are provided on their respective front end sides.
Metal rings provided as first, second, and nth outer poles are connected and connected to the outer peripheral surface of the body of the coaxial multipolar plug to be assembled. This metal ring is a lug piece that extends in the left-right direction at the front end side of the metal plate when the connection terminal piece in the form of a divided intermediate sleeve is formed into a predetermined shape from the metal plate of the material. May be formed, and it may be curved and formed into a ring shape so as to be integrally connected and connected.

The connecting terminal pieces formed in the shape of the divided intermediate sleeve are formed with a bent locking portion which is bent in a crank shape on the base end side of each of them. When this is set in the mold by arranging it in a predetermined position, this bent engagement portion is engaged with a molding groove and an engagement step formed on the inner surface of the lower mold of the mold, and then The outer surface of the upper mold to be assembled is locked at a predetermined position of the mold so as not to move in the circumferential direction and the axial direction, so that molding by pressure injection of the resin material is performed.

[0012] In this molding, the divided intermediate sleeve-shaped connecting terminal pieces are assembled into a set as a set of parts for assembling the die into a single set.

The work of assembling the parts into a set when setting the mold in the mold is performed in the case of assembling a four-pole coaxial multipole plug. From the lower side, inserts the bent engagement portion on the base end side of the divided intermediate sleeve-shaped connection terminal piece on the side formed with a shorter length in the axial direction, and then forms a longer length in the axial direction The metal ring provided on the distal end side of each of the divided intermediate sleeve-shaped connection terminal pieces is inserted vertically through the bent locking portion on the base end side of the divided intermediate sleeve-shaped connection terminal piece on the divided side. And, there, the center pin connected to the head, with the rear end side of it as the tip,
The head connected to the center pin is inserted from the bottom into the parallel metal ring and the outer sleeve to support the parallel metal ring from below, and the rear end of the center pin projects upward from the outer sleeve. By this, by holding the rear end side of the center pin projecting upward from the outer cylinder sleeve, coaxial multipoles such as the outer cylinder sleeve, divided intermediate sleeve-shaped connection terminal pieces, metal ring, center pin, head, etc. can be formed. Each set of parts to be assembled is combined into one set and can be moved in a combined state.

Then, each of the combined components is carried into a mold, set therein, and molded by pressure injection of a resin material.

[0015]

Next, an embodiment will be described in detail with reference to the drawings. Note that the same reference numerals as those of the conventional means are used for the drawings.

FIG. 3 is a side view of the coaxial multipole plug assembled into four poles by the means of the present invention, FIG. 4 is a rear view of the same, FIG. 5 is a front view of the same, FIG. 6 is a longitudinal side view of the same, and FIG. I in FIG.
8 is a sectional view taken along line II-II of FIG.

In the same figure, 1 is a head made of a metal material, 10 is a metal center pin formed at the rear end side of the head 1 so as to extend backward from the same metal material, and 2 is made of a metal material. The outer sleeve 3a is formed of a metal material, and a first split intermediate sleeve-like connecting terminal piece 30 disposed between the outer sleeve 2 and the center pin 10 is integrally connected to the front end thereof. The metal ring 31 serving as the first outer pole formed by the bending is formed by bending the first terminal ring 3a in the form of a crank at the rear end side of the connection terminal piece 3a in the form of a split intermediate sleeve. It is formed of a metal material, and is symmetrical between the inner surface of the outer sleeve 2 and the outer surface of the center pin 10 with the center pin 10 as the axis of symmetry with respect to the first split intermediate sleeve-shaped connection terminal piece 3a. The second part which is arranged and arranged Intermediate sleeve-like connecting terminal piece 32
Is a metal ring serving as a second outer pole integrally and continuously formed on the front end side thereof, and 33 is a crank-shaped bend formed on the rear end side of the second divided intermediate sleeve-shaped connection terminal piece 3b. The bent engagement portion p formed by the above-described method is the head 1, the center pin 10, the outer sleeve 2, the first divided intermediate sleeve-shaped connection terminal piece 3a, the first metal ring 30, and the second divided intermediate sleeve. It is a resin material that is filled between the components such as the connection terminal strip 3b, the second metal ring 32, and the like so as to be insulated and integrally connected.

As shown in FIG. 9, the head 1 and the center pin 10 are formed by cutting a metal material so that the center pin 10 extends rearward from the rear end face of the head 1.

As shown in FIGS. 10 and 11, the outer cylinder sleeve 2 is formed in a cylindrical shape as shown in FIGS. 10 and 11, and has a flange portion 20 on the rear end side and a step portion 21 in the middle of the body portion. Have.

First split intermediate sleeve-shaped connection terminal piece 3
a is a front-rear length substantially corresponding to the intermediate sleeve 3 of the conventional tripolar coaxial plug as shown in FIG. 1
As shown in FIG. 2 to FIG. 14, a metal ring 30 serving as a first outer pole is connected to the front end side, and a crank-shaped bent locking portion 31 is formed at the rear end side. is there.

Second split intermediate sleeve-shaped connection terminal strip 3
b is the first divided intermediate sleeve-shaped connection terminal piece 3
Similarly to a, a metal plate is bent into a predetermined shape, and a metal ring 32 serving as a second outer pole is connected to the front end side by press molding as shown in FIGS. The end portion is formed in a shape having a bent locking portion 33 bent in a crank shape, and the main portion thereof has a front-rear length, as shown in FIG. 6, of the first connection terminal piece 3a. It is formed shorter than the front-rear length of the main body.

[0022] The first terminal forming these connection terminal strips.
Each of the main portions of the second connection terminal pieces 3a and 3b is formed to have a width smaller than a length obtained by dividing the conventional intermediate sleeve 3 in the circumferential direction into two as shown in FIGS. .

FIGS. 18 to 20 show the head 1, the center pin 10, the outer sleeve 2 and the first connection terminal strip 3.
FIG. 7A is a diagram for explaining a process order in which components such as a second connection terminal piece 3b are combined into one set when the components are set in a mold.

These components firstly hold the outer sleeve 2 in a posture in which the front end side is downward, and the outer sleeve 2 is provided with a bending member on the rear end side of the second connection terminal piece 3b having a reduced length of the main body. The stopper 33 is inserted from below as shown in FIG. Next, the bending engagement portion 31 on the rear end side of the second connection terminal piece 3b is inserted through the outer cylinder sleeve 2 from below and hooked on the outer cylinder sleeve 2 as shown in FIG. Next, the center pin 10 is
With the rear end thereof facing upward, the respective metal rings 30. 3 of the first and second connection terminal pieces 3 a and 3 b are placed.
20 from below, and the rear end side of FIG.
As shown in FIG.

Thus, the components are combined into one set, and the rear end side of the center pin 10 projecting upward from the outer sleeve 2 is gripped, so that the desired combination of the components remains in the set. You can move to the place.

Next, FIGS. 21 to 26 show a mold B in which the above-mentioned components are set and molded with a resin material.
It is explanatory drawing of the process of assembling and setting each component.

FIG. 21 is a vertical sectional front view of the lower die 5 of the mold B, FIG. 22 is a plan view of the lower die 5 of the same, and FIG. 23 is a vertical sectional side view of the same. This lower mold 5 has a cylindrical first concave groove 5 having a ring-shaped tapered surface 50 at the upper end.
a, a cylindrical second concave groove 5b having an inner diameter of the inner edge of the ring-shaped tapered surface 50 is formed below the cylindrical groove 5b, and a cylindrical small groove 5b having a slightly smaller diameter is formed below the cylindrical concave groove 5b. The third concave groove 5c is short and continuous, and below it, the cylindrical fourth concave groove 5d having a smaller diameter is long and continuous, and below it,
Further, a cylindrical fifth concave groove 5e having a small diameter is formed so as to be continuous with a bottom surface in a cone shape.

A first step 51 is formed on the inner wall surface between the second groove 5b and the third groove 5c.
A second step 52 is formed between the concave groove 5c and the fourth groove 5d, and a third step 53 is formed between the fourth groove 5d and the fifth groove 5e. I have.

In a range extending from the inner wall surface of the first groove 5a to the inner wall surface of the second groove 5b, as shown in FIG. Are formed so as to face each other with a phase difference of about 180 degrees in the circumferential direction, and the bottoms thereof are formed in the engaging step portions b. I have.

The set of components for the lower mold 5 is processed by the above-described combination process, and the combined components are gripped at the rear end side of the center pin 10 of the set.
The bent engagement portions 31 and 33 formed on the rear end sides of the second divided intermediate sleeves 3a and 3b are located in the pair of opposing hollows z and z. It is performed by dropping it into the lower mold 5.

By the operation of this step, the first and second connection terminal strips 3a as shown by the chain line in FIG.
3b is formed by fitting bent engagement portions 31 and 34 formed on the rear end side thereof into a pair of hollows z and z formed on the inner wall surface of the lower mold 5 so as to be opposed to each other. Engagement step y
y, it is suspended in the lower mold 5 and, in the first connection terminal piece 3a, the tip edge of the first metal ring 30 on the tip side of the first connection terminal piece 3a is in the third step. It comes to hit the part 53.

In the outer sleeve 2, the rear flange 20 and the body step 21 are engaged with the first and second steps 51 and 52, respectively, and Will be retained.

When the rear end of the gripped center pin 10 is released, the head 1 at the end of the center pin 10 falls into the bottom of the fifth concave groove 5e so that each part occupies a predetermined position. Become.

Then, when the upper mold 6 of the mold B is assembled as shown in FIGS. 24 and 25 in this state, each part is placed in the mold as shown in FIG. It is set while being held at the state position, and is molded into a four-pole coaxial multipole plug A by pressurizing injection of a resin material from a gate G of a mold.

Next, FIGS. 27 to 38 show another embodiment. In this example, the number of poles is further increased by one to assemble a five-pole coaxial multipole plug.

In this example, as shown in FIG. 27, the outer peripheral surface of the body a of the coaxial multipolar plug to be assembled is located between the rear end surface of the head 1 and the front end edge of the outer sleeve 2 as shown in FIG. Since the metal rings 30, 32, and 34 serving as the outer poles of the three metal rings 30 and 32 are arranged in parallel in triplicate, these three metal rings 30.
Three connection terminal pieces to be connected to 32 and 34 will be used.

For this reason, when forming each of these three connection terminal pieces in the form of a divided intermediate sleeve in which the intermediate sleeve is divided in the circumferential direction, the intermediate sleeve is divided into three parts in the circumferential direction and the peripheral sleeve is divided into three parts. The width in the direction is formed to be smaller than one third of the entire circumference of the intermediate sleeve.

Each of the three divided intermediate sleeve-shaped connection terminal pieces 3a, 3b and 3c has a length as shown in FIG.
-As shown in Fig. 37 and Fig. 38, they are formed into three types, long, medium and short respectively.

Metal rings 30, 32, and 34 are provided on the front end side of each of the three types of divided intermediate sleeve-shaped connection terminal pieces 3a, 3b, and 3c, and are provided on the rear end side. Is similar to that of the above-described quadrupole embodiment in that the bending locking portions 31, 33, and 35 that bend in an angle shape are formed.

The center pin 10 in this example is
Is formed in a long shaft as shown in FIG. 33, and the outer sleeve 2 is formed as shown in FIGS. 34 and 35.
The length in the axial direction is somewhat shorter than that in the above-described quadrupole embodiment.

These head 1, center pin 10, outer sleeve 2, first, second and third connection terminal pieces 3 a.
The components such as 3b and 3c are combined into one set to be mounted on one coaxial plug in the same process as in the above-described four-pole embodiment.

The mold for setting the set of these combined components extends from the inner wall surface of the first concave groove 5a of the lower die 5 to an intermediate portion above and below the inner wall surface of the second concave groove 5b. Except for the fact that the molding grooves z provided as described above are respectively provided at substantially equally spaced parts in the circumferential direction, they may be formed substantially in the same manner as the mold B for molding the above-described quadrupole coaxial multipole plug. .

[0043]

As described above, in the means of the present invention, the outer pole is arranged on the outer peripheral surface of the body in the front-rear direction by being arranged between the head serving as the inner pole and the outer cylinder sleeve serving as the ground pole. A connection terminal piece to be connected to the metal ring to be provided is provided between the outer peripheral surface of the center pin continuous to the rear end side of the head and the inner peripheral surface of the outer cylindrical sleeve fitted therein. Formed in the shape of a divided sleeve divided into a plurality in the circumferential direction, metal rings are connected to their front ends, and these connection terminal pieces are placed between the outer peripheral surface of the center pin and the inner peripheral surface of the outer sleeve. When viewed in the front-back direction, the connection terminals are arranged so as to be continuous in a ring shape at intervals in the circumferential direction. Therefore, even if the number of outer poles is increased to four poles, five poles,. Make sure that the pieces become multi-layered Without, so pressurized injection of the resin material during molding is carried out to an appropriate probability.

[Brief description of the drawings]

FIG. 1 is a side view of a conventional three-pole coaxial multipole plug.

FIG. 2 is a vertical sectional side view of the same.

FIG. 3 is a side view of a four-pole coaxial multipole plug according to the present invention;

FIG. 4 is a rear view of the above.

FIG. 5 is a front view of the same.

FIG. 6 is a vertical sectional side view of the same.

FIG. 7 is a sectional view taken along line II in FIG. 6 of the above.

FIG. 8 is a sectional view taken along the line II-II in FIG.

FIG. 9 is a side view of the head and the center pin of the above.

FIG. 10 is a side view of the outer sleeve of the above.

FIG. 11 is a longitudinal side view of the outer cylinder sleeve of the above.

FIG. 12 is a plan view of a first connection terminal piece of the above.

FIG. 13 is a side view of the first connection terminal piece of the above.

FIG. 14 is a bottom view of the connection terminal piece of the layered phi 1;

FIG. 15 is a plan view of a second connection terminal piece of the above.

FIG. 16 is a side view of the second connection terminal piece of the above.

FIG. 17 is a bottom view of the connection terminal piece.

FIG. 18 is an explanatory diagram of a first step in a step order of combining the above components.

FIG. 19 is an explanatory diagram of a second step in the order of steps for combining the above components.

FIG. 20 is an explanatory diagram of a third step in the order of steps for combining the above components.

FIG. 21 is a vertical sectional front view of a lower mold of a mold used in the means of the present invention.

FIG. 22 is a plan view of a lower mold of the above-described mold.

FIG. 23 is a vertical sectional side view of a lower die of the same die.

FIG. 24 is a longitudinal sectional front view of a main part of a lower die and an upper die of the same die.

FIG. 25 is a longitudinal sectional side view of a main part of a lower die and an upper die of the same die.

FIG. 26 is a vertical sectional front view showing a state in which an assembly part of a coaxial multipolar plug is set in a lower mold of the same metal mold.

FIG. 27 is a side view of a five-pole coaxial multipole plug according to the present invention;

FIG. 28 is a rear view of the plug.

FIG. 29 is a vertical sectional side view of the plug.

30 is a sectional view of the same plug, taken along the line II in FIG. 29;

FIG. 31 is a sectional view of the same plug taken along line II-II in FIG. 29;

FIG. 32 is a sectional view of the plug, taken along line III-III in FIG. 29;

FIG. 33 is a side view of a head and a center pin of the plug.

FIG. 34 is a side view of an outer sleeve of the plug.

FIG. 35 is a vertical sectional side view of an outer sleeve of the plug.

FIG. 36 is a side view of a first connection terminal piece of the plug.

FIG. 37 is a side view of a second connection terminal piece of the plug.

FIG. 38 is a side view of a third connection terminal piece of the plug.

[Explanation of symbols]

A: coaxial multi-pole plug, B: mold, G: gate, a: body, z: hollow groove, y: engagement step, p: resin material, 1: head, 10: center pin, 2 ... outside Tube sleeve, 20 flange, 21 step, 3 intermediate sleeve, 3a / 3b connection terminal piece, 30 metal ring, 31 bending engagement part, 32 ...
Metal ring, 33: bending locking part, 34: metal ring, 3
5 ... Bending part, 5 ... Lower mold, 5a / 5b / 5c / 5d.
5e: concave groove, 50: tapered surface, 51, 52, 53: step, 6: upper die.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 24/06 H01R 43/00

Claims (3)

(57) [Claims] An outer peripheral side of a body between a head serving as an inner pole and an outer sleeve serving as an earth pole is provided with first, second,.
A connection terminal piece to be connected to a metal ring disposed in parallel in the front and rear as an nth outer pole is coaxially fitted to an outer peripheral surface of a center pin continuous to a rear end side of the head and an outer periphery thereof. An intermediate sleeve disposed coaxially with respect to the center pin between the inner sleeve and the inner peripheral surface of the outer cylindrical sleeve to be formed is formed into a divided intermediate sleeve shape in which the intermediate sleeve is complicatedly divided in the circumferential direction, and the divided intermediate sleeve-shaped connection terminals are formed. At the front end side of each of the pieces, a metal ring disposed in parallel with the outer peripheral surface of the body as the first, second,... On the side, a bent locking portion bent in the shape of a crank is formed, and these divided intermediate sleeve-shaped connection terminal pieces are disposed between the outer surface of the center pin and the inner surface of the outer cylinder sleeve at an interval in the circumferential direction. Ring shaped in direction Coaxial multipole plugs coordinated to, and set in a mold in this state, characterized by being molded by the resin material injected into the mold. 2. A connection which is arranged between a head serving as an inner pole and an outer cylinder sleeve serving as an earth pole, and is connected to and connected to a metal ring serving as an outer pole which is provided on an outer peripheral surface of the body in front and rear in parallel. A terminal piece is coaxially arranged with respect to the center pin between an outer peripheral surface of a center pin that is continuous with the rear end side of the head and an inner peripheral surface of an outer cylindrical sleeve that is coaxially fitted around the center pin. The intermediate sleeve is divided into a plurality of pieces in the circumferential direction to form divided intermediate sleeves, and the metal rings serving as the outer poles are respectively connected to the front ends thereof, and the rear ends are bent and bent in a crank shape. Parts are formed, and each of these connection terminal pieces is fitted in the rear end edge of the outer cylinder sleeve by sequentially inserting the bending engagement portions on their respective rear ends from the front end side of the outer cylinder sleeve into its inner cavity. Lock, then each of these connection terminal pieces A center pin continuous to the rear end of the head is inserted into the metal ring connected to the front end of the head in order from the rear end, and the rear end is projected from the rear end of the outer sleeve. By lifting the rear end of the center pin, the head, center pin, outer sleeve,
Combine each part such as metal ring and connection terminal piece into one set, transfer it to the mold in that state, set each part in the mold, and mold it into a coaxial multipole plug by injecting resin material A method of assembling and forming a coaxial plug. 3. A locking step portion which is axially engaged with a bent locking portion on the rear end side of each connecting terminal piece set on the mold, and is circumferentially engaged with the bent locking portion. With the molding groove to be fitted, the bending step of each connection terminal piece is engaged with the locking step and the molding groove, and the mold is set by pressing the resin material. 3. The method of assembling and forming a coaxial multipolar plug according to claim 2, wherein the method is performed.