JP3155182B2 - Surface mount type coaxial connector and method of manufacturing the surface mount type coaxial connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mount type coaxial connector which is attached to an input / output unit of a high frequency device which handles a relatively high frequency, such as a portable telephone and a navigation device.

[0002]

2. Description of the Related Art Conventional surface mount type coaxial connectors include:
For example, there is a surface mount type coaxial connector as shown in FIGS. FIG. 14 is a perspective view of a conventional surface mount type coaxial connector, and FIG. 15 is a sectional view thereof. FIG.
FIG. 2 shows a soldering state diagram in which the lead terminals of the surface mount type coaxial connector are soldered to a copper foil pattern of a circuit board.

In FIG. 1, reference numeral 12 denotes an external contact, 13 denotes a center contact, and 14 denotes an insulator for fixing and holding the external contact 12 and the center contact 13. 12a is a lead terminal for soldering the external contact 12,
12e shows the end face. Reference numeral 13a denotes a lead terminal for soldering the center contact 13, and 13e shows an end surface thereof. Reference numeral 5 denotes a circuit board, and reference numeral 8 denotes a copper foil pattern formed on the circuit board 5 for soldering.
9 shows a soldering portion.

Then, in order to attach the surface-mounted coaxial connector thus configured to the circuit board 5, lead terminals 12a and 13a for soldering are formed on the circuit board 5 as shown in FIG. On the copper foil pattern 8 to be soldered 9. This soldering 9 is generally performed by soldering with iron, but recently, a method of applying cream solder to a soldering portion and performing soldering 9 through a reflow furnace has been proposed.

[0005]

However, in manufacturing such a conventional surface mount type coaxial connector, resin is generally injected after the external contact 12 and the center contact 13 are fixed to a molding die. In such a manufacturing process, two contacts of the external contact 12 and the center contact 13 are paired and fed into a mold so that the center contact 13 is located at the center of the external contact 12. I had to work while checking if I was doing it. The reason is that the position of the external contact 12 and the position of the center contact 13 vary due to variations in the dimensions of the mold and the like, and the variation causes the center contact 13 to be displaced from the center of the external contact 12. This is because problems such as non-fitting connection occur at the time of fitting connection with the connector. For this reason, a mold having extremely high dimensional accuracy has been required, which has made it difficult to perform insert molding with an automatic insert machine.

[0006] A mold having high dimensional accuracy causes an increase in the cost of the mold, and under the influence of this, the cost of a single surface mount type coaxial connector has also increased. Further, since the external contact 12 and the center contact 13 are generally formed by punching from separate metal plates, the number of materials to be used is wasted. This also increased the cost of a single surface mount coaxial connector.

In general, since this surface-mount type coaxial connector is used for high-density mounting high-frequency equipment and the like, a copper foil pattern 8 formed on a circuit board 5 to which this surface-mount type coaxial connector is attached is provided. Had an extremely narrow pattern. Then, since the surface-mounted coaxial connector is soldered to the extremely narrow copper foil pattern 8, the end faces 12e and 13e of the lead terminals 12a and 13a of the surface-mounted coaxial connector and the copper foil pattern 8 are soldered. I have to do it. However, the end faces 12e and 13
Since e had a non-plated fractured surface exposed when stamped with a die, the end faces 12e and 13e were difficult to be soldered, and much time was required for these soldering operations. There was a problem.

Accordingly, an object of the present invention is to solve these problems.

According to a first aspect of the present invention, there is provided a surface mount type coaxial connector, comprising: an insulating portion;
A cylindrical external contact is formed, in the insulating portion
And formed separately from the external contact.
Drawn to the center contact which is protruding in the center of the external contacts, the external contact lead terminals drawn out from the formed at the bottom of the outer contact external contact, the said central contact is formed at the bottom of the center contact the center contact lead terminal and the ingredients
The central contact is the central contact
The external contact is made by U-shaped bending the terminal.
It protrudes from the center of the gate .

According to a second aspect, the external contact
The end of the lead terminal is floated, and the external
The lower surface of the main body of the tact lead and the lower surface of the end are different.
Things.

[0011] The method of manufacturing the surface mount type coaxial connector of the present invention.
According to the third aspect of the present invention, the insulating portion and the inside of the insulating portion are provided.
Inserted cylindrical external contacts and the insulation
Insert formed in the part, separate from the external contact
And protrudingly formed at the center of the external contact.
And a central contact, (b) before and each of the external contact in a strip of metal plate
Punching process where the center contact is connected at the joint
Apply. (B) Curling the external contact.
Therefore, it is formed. (C) The center contact is drawn or wound.
To form. (D) Inject resin to form the external contact and the central connector.
Perform tact insert molding. (E) The external contact and the center from the joint part in the previous term
It has a step of cutting off the contact .

According to a fourth aspect of the present invention, the center contact is provided.
U-bending of the lead terminals allows the center connector
A step of projecting the tact to the center of the external contact
A shall which have a.

[0013]

The above technical means operates as follows. Two contacts, an external contact and a center contact, are formed on a strip-shaped metal plate, and punched and connected at the joints are inserted into a molding die and subjected to insert molding. By cutting from the portion, it is possible to simplify the checking process of checking whether the center contact 13 is located at the center of the external contact 12 at the time of insert processing, which has been conventionally required.

Further, the fracture surface of the lead terminal cut from the metal plate is processed by bending and floating toward the upper side of the lead terminal to be soldered so that the solder can be attached to the surface of the lead terminal. Things.

[0015]

1 to 13 show an embodiment of the present invention.
Hereinafter, the present invention will be described with reference to these drawings.

FIG. 1 is a perspective view of a frame punched by a progressive press process for continuously forming a portion to be a contact of a connector from a strip-shaped metal plate, and FIG. 2 is a diagram illustrating bending of a portion to be an external contact and drawing of a center contact. FIG. 3 is a view for explaining a method of winding a center contact, FIG. 4 is a perspective view showing a state where a curling process is applied to an external contact from the state of FIG. 2, and FIG. 5 is a state of FIG. From the center contact to the center of the external contact 18
FIG. 6A to FIG. 6D are perspective views showing a state in which the center contact is bent and inserted, and FIG. 6A to FIG. 6D are views for explaining a processing order for inserting the center contact into the external contact. FIG. A perspective view of a semi-finished product of a surface mount type coaxial connector obtained by performing insert molding on the processed product,
FIGS. 8A and 8B are cut-away views of the surface-mounted coaxial connector processed in FIG. 7 in a semi-finished product state to make a finished product. FIGS. 9A to 9D are semi-finished products. It is the figure which showed the cut part in the goods state, and the detail of the sectional view. 10 is a perspective view showing a completed state of the surface-mounted coaxial connector, FIG. 11 is a cross-sectional view of the surface-mounted coaxial connector, and FIG. 12 is a diagram showing the lead terminals 2a and 3a of the surface-mounted coaxial connector. FIG. 14 is an actual view showing a state where soldering 9 is performed on the copper foil pattern 8, and FIGS. 13A and 13B are detailed explanatory views of the soldering 9.

In these figures, the same parts as those of the conventional example and the embodiment of the present invention are denoted by the same reference numerals, respectively, and the description thereof is omitted.

An embodiment of the present invention is significantly different from the prior art in that the method of forming the two contacts, the external contact and the center contact, is different. In other words, in the conventional surface mount type coaxial connector, two contacts, the external contact and the center contact, are formed on separate metal plates, respectively, and are combined in a manufacturing process to perform insert molding to manufacture a surface mount type coaxial connector. I have.

On the other hand, the surface mount type coaxial connector of the present invention is obtained by forming two contacts, an external contact and a center contact, each connected to a strip-shaped metal plate at a joint bar, and directly putting them into a molding die. After the insert molding, the two contacts are cut from the joint bars to produce a surface-mounted coaxial connector.

As described above, according to the present invention, by cutting each of the two contacts from the joint bar after the insert molding, it is determined whether or not the center contact 13 is located at the center of the external contact 12 at the time of the insert machining, which is conventionally required. The confirmation step for confirming can be deleted. Further, the fracture surface of the lead terminal cut from the metal plate was bent and floated toward the upper side of the lead terminal to be soldered, so that the solder could be applied to the surface of the lead terminal. Features.

10 and 11, reference numeral 2 denotes an external contact, 3 denotes a center contact, 4 denotes an insulator for fixing and holding the external contact 2 and the center contact 3.
a is a lead terminal for soldering the external contact 2, 3a
Is a lead terminal for soldering the center contact 3.
The external contact 2 shown in FIG. 10 is formed into a substantially cylindrical shape by curling a metal plate pressed into a substantially rectangular shape, and the center contact 3 is narrowed down to a pressed metal plate as described above. It is a thin, pin-shaped, generally cylindrical shape that has been processed or wound. And, it is made of a resin that becomes an insulator 4 that fixedly holds the two contacts of the external contact 2 and the center contact 3.

Hereinafter, a method of manufacturing the surface mount type coaxial connector shown in FIG. 10 will be described with reference to FIGS.

In FIG. 1, P is a strip-shaped metal plate, 1 a and 1 b are pilot holes used as a guide for the die when processing the die, 1 c and 1 d are an inner punched portion and an outer punched portion punched by the die. Reference numeral 1 denotes an inner punched portion 1c formed by pressing a substantially rectangular flat portion 2 'serving as an external contact 2 and a substantially circular flat portion 3' serving as a center contact 3 on a strip-shaped metal plate P. External punching part 1
d is dropped to connect the flat portion 2 'and the flat portion 3' partially, and 2a and 2b are external contact lead terminals, 2c is the external contact lead terminal 2a and the connection bar 1 2d is a connecting portion between the external contact lead terminal 2a and the joint bar 1 and 3a is a center contact 3.
Is a central contact lead terminal connecting the flat portion 3 'and the joint bar portion 1 to each other. Reference numeral 3b denotes a bent portion for bending a flat portion 3 'described later.

In the step shown in FIG. 1, pilot holes 1a, 1a, 1b, and 1b are formed in a strip-shaped metal plate P, and an internal stamped portion 1c and an external stamped portion 1d are stamped with a mold to form an external contact 2. The flat portion 2 ′ and the flat portion 3 ′ serving as the center contact 3 are formed in a state supported by the joint bar 1. The support of the flat portion 2 'to be the external contact 2 and the joint bar 1 is performed by an external contact lead terminal having a predetermined width from one end of a substantially rectangular long side of the flat portion 2' to be the external contact 2. 2a. External contact lead terminals 2b each extend at a predetermined length in the same direction as the external contact lead terminals 2a on both sides of the external contact lead terminals 2a at predetermined intervals. . However, the external contact lead terminal 2b is not connected to the joint bar 1. The reason for this is, as described above, that the external contact 2
The support between the flat portion 2 'and the joint bar 1 is sufficient if only one portion of the external contact lead terminal 2a is supported.
The connection with the external contact terminal 2b is omitted. Also,
This also improves the efficiency at the time of cutting, which will be described later.

Further, the joint 1 and the flat portion 2 serving as the external contact 2 are connected to the external contact lead terminal 2a and the connecting portion 2 respectively.
The step 2c is connected by d, and a step 2c having a size approximately equivalent to the thickness of the strip-shaped metal plate 1 is formed therebetween when the inner punching portion 1c is punched.

In the step shown in FIG. 2, the external contact 2 left in the step shown in FIG. 1 is formed along one end of the long side where the external contact lead terminals 2a, 2b and 2b are formed. The flat part 2 ′ is bent upward at a substantially right angle to the band-shaped metal plate P, using the place as a fulcrum. Further, drawing is performed downward from the center of the flat portion 3 ′ to become the center contact 3, thereby forming a substantially cylindrical center contact 3.
In this embodiment, the center contact 3 is formed by drawing from the flat portion 3 ', but as shown in FIG. 3, the center contact 3 is extended downward from above the flat portion 3'. Later, the extended flat portion 3 'can be formed into a substantially cylindrical shape.

In the step shown in FIG. 4, the external contact 2 having the flat portion 2 'bent upward at a substantially right angle in the step of FIG. 2 is subjected to curling to form a substantially cylindrical shape. In this step, the external contact lead terminals 2a and 2b are bent at a right angle from near the root and the flat surface 2 'is bent so as to be flush with each other.

In the step shown in FIG. 5, the center contact 3 formed in the step shown in FIG. 2 is placed at the center of the external contact 2 formed in the step shown in FIG. In this method, as shown in FIGS. 6A to 6D, the center contact lead terminal 3a is bent 180 ° downward with the bent portion 3b of the center contact terminal 3a as a fulcrum. As a result, the center contact 3 is set at the center of the external contact 2.

In the step shown in FIG. 7, a resin for forming the insulator 4 is injected into the state in which the center contact 3 is installed on the external contact 2 in the step shown in FIG. 5, and insert molding is performed. In this step, it is better to perform a processing operation by applying a mask or the like to the insulator 4 so that the insulator 4 does not adhere to the inside of the external contact 2 or the center contact 3. Further, it is preferable that the lead terminal used for soldering the external contact lead terminal 3a and the center contact lead terminal 2a be processed so that the insulator 4 does not adhere to the lead terminal.
As described above, the one in FIG. 7 processed in this step is called a semi-finished product.

In the step shown in FIG. 8, the semi-finished product of the surface mount type coaxial connector processed in the step of FIG. That is, since the semi-finished product of the surface mount type coaxial connector is connected by the two lead terminals of the external contact lead terminal 3a to the joint bar 1 and the center contact lead terminal 2a, the two lead terminals are connected to each other. And cut at position c. The cutting method is described below.

First, the center contact lead terminal 3a is cut off at the A-side of the joint bar 1 as shown in FIG.
Cut from A 'and BB' positions. The center contact lead terminal 3a thus processed is as shown in the cross-sectional view of FIG. On the other hand, the external contact lead terminal 2a is cut from the position CC ′ of the joint bar 1 as shown in FIG. 9B. The external contact lead terminal 2a thus processed is as shown in the cross-sectional view of FIG.

As shown in FIG. 12, the surface-mounted coaxial connector completed by the above-described process has an external contact lead terminal 2a and a center contact lead terminal 3a on a copper foil pattern 8 formed on a circuit board 5. Each is fixed by soldering 9. At this time, the solder adheres to the plating surfaces of the lead terminals 2a and 3a and the copper foil pattern 8, so that the solder is adapted and the solder can be reliably formed.

That is, as shown in FIG. 13 (a), the soldering 9 between the center contact lead terminal 3a and the copper foil pattern 8 is made up of the surface of the bent portion 3b of the center contact lead terminal 3a and the copper foil pattern 8. Soldered. In the soldering 9 between the external contact lead terminal 2a and the copper foil pattern 8, as shown in FIG. 13B, the surface of the step 2c of the external contact lead terminal 2a and the copper foil pattern 8 are soldered. .

[0034]

According to the present invention, the external contact and the center contact of the surface mount type coaxial connector are formed on a strip-shaped metal plate, and the external contacts are formed by punching each connected by a joint bar. After the center contact is positioned, the insert itself is inserted into a molding die, and then the two connectors are cut from the joint bars, so that the center contact 13 becomes an external contact at the time of insert processing, which was conventionally required. Since it is possible to omit the confirmation step for confirming whether or not it is located at the center of the twelfth embodiment, it is possible to greatly reduce the manufacturing process and to perform molding with one insert molding die. As for the dimensional accuracy of the mold, since the external contact and the center contact are positioned at the time of punching by the press as described above,
There is no problem with general dimensional accuracy.

Further, since it is not necessary to perform a press working operation for each terminal, there is no waste in the number of materials taken. Accordingly, the automatic molding process can be easily performed as described above, so that a single surface mount type coaxial connector can be manufactured at low cost.

Further, as for the soldering of each lead terminal and the copper foil pattern formed on the circuit board, the surface of each lead terminal and the copper foil pattern surface can be soldered, so that the solder can be easily applied. Soldering work can be done instantly. Further, soldering can be easily performed even with a copper foil pattern having an extremely narrow width. Therefore, the quality of soldering between each lead terminal and the copper foil pattern formed on the circuit board can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a skeleton punched out by a progressive pressing process for continuously forming a portion to be a contact of a connector from a strip-shaped metal plate according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a portion serving as an external contact has been bent and a center contact has been drawn or wound according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a method of winding a center contact in FIG. 2;

FIG. 4 is a perspective view showing a state in which external contacts are subjected to curling processing from the state shown in FIG. 2 according to one embodiment of the present invention.

FIG. 5 is a perspective view illustrating a state where the center contact is bent 180 ° around the center of the external contact from the state of FIG. 4 according to an embodiment of the present invention;

FIG. 6 is a view for explaining a processing order for setting a center contact to an external contact in FIG. 5;

FIG. 7 is a perspective view of a semi-finished surface-mounted coaxial connector obtained by performing insert molding on the workpiece processed to the state of FIG. 5 according to one embodiment of the present invention.

FIG. 8 is a cut-away view of a semi-finished product of the surface-mounted coaxial connector processed in FIG. 7 according to one embodiment of the present invention to make it into a finished product.

FIG. 9 is a cross-sectional view and a sectional view of the lead terminals 3a and 2a of the surface mount type coaxial connector in FIG.

FIG. 10 is a perspective view showing a completed state of the surface mount type coaxial connector according to one embodiment of the present invention.

FIG. 11 is a sectional view of a surface mount type coaxial connector according to an embodiment of the present invention.

FIG. 12 is a schematic view showing a state where lead terminals 2a and 3a of the surface mount type coaxial connector according to one embodiment of the present invention are soldered 9 to a copper foil pattern 8 of a circuit board 5;

FIG. 13 is a detailed explanatory view in which lead terminals 3a and 2a are soldered 9 to a copper foil pattern 8 in FIG.

FIG. 14 is a perspective view of a conventional surface mount type coaxial connector.

FIG. 15 is a sectional view of a conventional surface mount type coaxial connector.

FIG. 16 shows a lead 22 of a conventional surface mount type coaxial connector.
a, 23a to the copper foil pattern 8 of the circuit board 5 by soldering 9
FIG. 3 is a substantive view showing a state in which the state of FIG.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 splicing portion 1a, 1b pilot hole 1c inner punching portion 1d outer punching portion 2 external contact 2a, 2b external contact lead terminal 2c stepped portion 2d connection portion with splicing bar 1e fracture surface of external contact lead terminal 2 ' Rectangular flat portion 3 center contact 3a center contact lead terminal 3b bent portion 3c folded portion of center contact lead terminal 3e fractured surface of center contact lead terminal 3 'substantially circular flat portion 4 insulator 5 circuit board 8 circuit Copper foil pattern on board 9 Soldering P Strip metal plate

Claims (4)

(57) [Claims] And 1. A insulating portion, said insulating a cylindrical external contact insert-formed portion is inserted formed in the insulating portion, the external contactor
A central contact that is separate from the contact and protrudes at the center of the external contact; and the external contact that is formed at the bottom of the external contact.
And the external contact lead terminals drawn out from, said center contact formed on the bottom of the center contact
And a center contact lead terminal extending from
And the center contact is the center contact lead terminal.
By U-bending,
A surface mount type coaxial connector characterized by being protruded from the core . 2. An end of said external contact lead terminal is
The main body of the external contact lead is processed by floating
And a lower surface of the end portion is different.
The surface mount type coaxial connector according to claim 1. 3. An insulating portion, and a cylindrical external contour formed in the insulating portion by insert formation.
A contact and an insert formed in the insulating portion, the external contact
Protruding from the center of the external contact
And a center contact formed, (b), respectively a strip of metal plate the external contact before
Punching process where the center contact is connected at the joint
Apply. (B) Curling the external contact.
Therefore, it is formed. (C) The center contact is drawn or wound.
To form. (D) Inject resin to form the external contact and the central connector.
Perform tact insert molding. (E) The external contact and the center from the joint part in the previous term
Having a step of cutting off the contact.
Manufacturing method of surface mount type coaxial connector. 4. The center contact lead terminal is bent in a U-shape.
By processing , the center contact is connected to the external core.
It is characterized by having a process of projecting to the center of the contact
4. A method for manufacturing a surface mount type coaxial connector according to claim 3.
Law.