JP2000200666A - Connector terminal forming die and method and connector terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forming die for a connector terminal wherein an external connecting terminals are restricted from bending and deformation, when subjected to offset bending, for more productivity. SOLUTION: A forming die for forming a connector terminal blank on which external connecting terminals corresponding to a connecting electrode on a circuit board are tied to a connecting member in a comb form includes a punch 221 for punching between adjacent external connecting terminals, a die 511 provided with a punching hole 211a corresponding to the punch 221 and a stripper plate 222 for thrusting and fixing a hoop material located on the die 511 to the die 511 in the areas of the external connecting terminals, the die 511 having a protrusion 511b on the die surface 511a on which the hoop material is placed, the protrusion 511b being formed to be bitten into the external connecting terminal of the hoop material thrust and fixed with the stripper plate 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a plug terminal manufacturing die of a surface mount type connector (hereinafter simply referred to as a connector) in which connection terminals connected to a circuit board surface are arranged in a line. In particular, in a connector terminal in which an external connection terminal area is offset bent, bending and deformation at the time of the offset bending are suppressed, thereby facilitating manufacture as a connector and improving productivity by improving the productivity of the connector terminal. Method and connector terminals.

[0002]

2. Description of the Related Art As a technical background, a connector according to the present invention is described together with a mating connector. FIG. 9 is a diagram illustrating a configuration as a connector device together with a method of mounting on a circuit board, and FIG. 11 illustrates the second plug terminal of FIG. 9, FIG. 12 illustrates the plug insulator of FIG. 9, and FIG. 13 illustrates an assembling method as a connector. FIG. 14 and FIG.
FIG. 3 is a diagram (part 2) for explaining an assembling method as a connector.

FIG. 15 is a view for explaining a state of forming the external connection terminal of the first plug terminal, FIG. 16 is a partial cross-sectional view showing an external connection terminal forming area of the molding die, and FIG. 17 is an external view of FIG. It is the figure which showed the connection terminal molding state in time series.

FIG. 18 is a view for explaining a problem in a conventional molding die (No. 1), and FIG. 19 is a view for explaining a problem in a conventional molding die (No. 2).

FIG. 1 shows an example in which the connector according to the present invention has two rows of plug contacts.

In FIG. 9, a conventional connector device 1 includes a jack connector 11 connected to an electronic device (not shown) and a plug connector according to the present invention, which is surface-mounted near an end 15a of a circuit board (hereinafter simply referred to as a board) 15. 12 (hereinafter referred to as a connector).

The inner jack connector 11 is a jack insulator 112 for implanting a straight jack terminal 111 and a plurality of jack terminals 111 in a matrix of two rows.
It consists of:

The jack terminal 111 in which a metal plate having a spring property such as a phosphor bronze plate is formed by a normal press punching and bending technique or the like has one end of each of plug contacts 121 and 122 of plug terminals 121 and 122 described later. A jack contact 111a is formed at one end of the jack contact 111a, which is bifurcated so as to press and sandwich the region from both sides, and an insulator fixing portion 111b following the jack contact 111a
The other end is formed on an external connection terminal 111c which is a connection area with a signal line connected to the electronic device (not shown).

The jack insulator 112 is formed such that the periphery of a terminal planting portion 112a in which the jack terminal 111 is arranged and planted in the region of the insulator fixing portion 111b is the length of the jack contact 111a of the jack terminal 111. Is surrounded by a peripheral wall 112b having a height exceeding
Terminal holes 112c large enough to fix the jack terminals 111 by press-fitting of the insulator fixing portions 111b are formed in the terminal planting portions 112a in a two-row matrix with a required pitch. .

The required pitch between the terminal holes adjacent to the terminal holes 112c is, for example, such that the pitch in the terminal row direction is "p ₁ " and the pitch between the terminal rows is "p ₂ ".

Therefore, when the jack terminal 111 having the external connection terminal 111c at the top is pressed into the terminal hole 112c of the jack insulator 112 from the peripheral wall side, the insulator fixing portion 111b bites into the inner wall surface of the terminal hole. The jack connector 11 to which the jack terminal 111 is fixed in a state where the external connection terminal 111c protrudes from the terminal implant portion 112a can be configured as illustrated.

On the other hand, the connector 12 according to the present invention
Are a first plug terminal 121 and a second plug terminal 122
And a plug insulator 123 implanted at a position such that each plug contact area corresponds to each jack terminal 111 of the jack connector 11.

Here, in order to facilitate understanding of the connector 12, the first plug terminal 121 in FIG.
12 and the plug insulator 12 in FIG.
3 will be described first.

Referring to FIG. 10 for explaining the first plug terminal, a first plug terminal blank 121 'is formed so that a required first plug terminal 121 is formed in a comb-like shape at the above-mentioned pitch "p ₁ " on the connecting member 121 ". They are connected.

The required first plug terminal 121 is
One end is a jack contact 1 of the jack terminal 111.
In plug contacts 121a corresponding to 11a, are those reduced width has been the other end in the width direction on one side of an insulator attaching portion 121b continuing to the plug contact 121a is formed on the external connection terminal 121c of a predetermined length a ₁ The end of the external connection terminal 121c is connected to the connection member 121 ″.

The insulator fixing portion 121b can be fixed to a later-described terminal hole 123c of the plug insulator 123 by bulges 121b 'protruding from both sides in the width direction.

Then, the first plug terminal blank 1
21 'is bent at the end of the external connection terminal to form the connecting member 1
Separation from 21 "allows individual first plug terminal blanks 121 'to be obtained.

FIG. 11 for explaining the second plug terminal
Then, the second plug terminal blank 122 ′ is
Are connected to the connecting member 122 ″ at the same pitch “p ₁ ” as in FIG.

In this case, the second plug terminal 12
2 is a plug contact 122a whose one end has the same size as the plug contact 121a of the first plug terminal 121, and a region following the plug contact is the same as the insulator fixing portion 121b of the first plug terminal 121. It formed in the fixed part 122b, from outside the insulating body fixing portion 122b to the first end side which is reduced width projecting in the width direction of the plug pin 121 and opposite of said predetermined length a ₁ length greater than a ₂ It is formed on the connection terminal 122c, and is connected to the connection member 122 ″ at the other end of the external connection terminal 122c.

Note that the length a ₂ substantially corresponds to the length obtained by adding the pitch “p ₂ ” between the terminal rows to the length a ₁ .

Further, the region of the insulator fixing portion 122b and the region of the external connection terminal 122c are _one- pitch of the pitch "p ₁ ".
/ 2 ie "p _1/2" only been formed is shifted in the width direction.

Then, the second plug terminal blank 1
The second plug terminal blanks 122 'can be obtained by bending the 22' at the end of the external connection terminal 122c and separating it from the connecting member 122 ".

FIG. 12 shows the plug insulator 123.
(12-1) is an overall perspective view in which a part is viewed in cross section, and (12-2) is a side view in which (12-1) is viewed from the arrow C direction.

In FIG. 12, the plug insulator 123 is connected to the first
And the height of the plug contacts 121a and 122a slightly exceeding the length of the plug contacts 121a and 122a around the terminal arrangement area 123a where the second plug terminals 121 and 122 are implanted at respective positions corresponding to the jack terminals 11 in the jack connector 11. A peripheral wall 123b is formed, and the inner surface 123b 'of the peripheral wall 123b serves as a guide surface for the outer surface of the peripheral wall of the jack connector 11.

The terminal arrangement region 123a has a terminal hole 123c large enough to allow the insulator fixing portions 121b and 122b of the first and second plug terminals 121 and 122 to be fixed by press-fitting. The arrangement pitch, that is, the pitch between adjacent terminals in the terminal row direction is “p ₁ ”, and the pitch between terminal rows is “p ₂ ”.

Therefore, as shown in FIG.
The substrate mounting surface 123 at 23 'as (shown lower surface) side of the terminal hole 123c columns arrow E ₁ of the first plug terminal blank 12 described above in the state that led to the connecting member 121'
1 'is inserted from the plug contact side in a lump, and the first plug terminal blank 121' is pressed into the terminal hole 123c by the insulator fixing portion 121b.
3 and then the connecting member 121 ″ is broken off so that each of the first
Of the plug terminal blank 121 '.

Next, as shown in FIG. 14, the external connection terminals 121 in each first plug terminal blank 121 'are formed.
The area c is offset bent to a predetermined height toward the substrate mounting surface 123 '. In this case, the offset bending height is such that the lower surface of the tip of the external connection terminal coincides with the substrate mounting surface 123'. And the bending angle “α” on the distal end side of the external connection terminal in the offset bending area is an obtuse angle slightly exceeding 90 ° as shown in FIG. I have.

Further, the plug insulator 123 as columns of arrow E ₂ in the terminal hole 123c which is farther from the substrate mounting surface 123 'of the second plug terminal blank state led to the connecting member 122' 122 'are inserted all at once from the plug contact side, and the second plug terminal blank 122' is fixed to the plug insulator 123 by press-fitting the insulator fixing portion 122b into the terminal hole 123c. The second plug terminal blank 122 'is divided into individual pieces by folding the second plug terminal blank 122'.

FIG. 14 shows the state at this point. The plug insulator 123 has a required first plug terminal 1.
21 and the second plug terminal blank 1 before offset bending
22 'is in a planted state.

Therefore, the area of the external connection terminal 122c of the second plug terminal blank 122 'in FIG. 14 is offset bent to a predetermined height toward the substrate mounting surface 123' in the same manner as described above. The bending height is set such that the lower surface of the distal end of the external connection terminal coincides with the substrate mounting surface 123 ′, and the bending angle “α” on the distal end side of the external connection terminal in the offset bending region is 90 °.
Is slightly the same as that of the first plug terminal 121 described above.

Therefore, the second plug terminal blank 12
By adding the offset bending process according to 2 ′, the first
The connector 12 in which the plug terminals 121 and the second plug terminals 122 are aligned and lined up in each row can be configured as shown in FIG.

In this connector 12, the tip of the external connection terminal of the first plug terminal 121 and the tip of the external connection terminal of the second plug terminal 122 are substantially the same as the substrate mounting surface 123 'of the plug insulator 123. Although the terminals are aligned on the surface while maintaining the pitch “p _1/2 ” between adjacent terminals, since the bending angle on the front end side of each external connection terminal exceeds 90 degrees, the front end of each external connection terminal is mounted on the substrate of the plug insulator 123. It is in a state of slightly protruding from the placing surface 123 '.

On the other hand, the connection electrodes 15b are formed on the substrate 15 at positions corresponding to the external connection terminals 121c and 122c.

Accordingly, the connector 12 is mounted on the substrate 15 using, for example, a vacuum suction head (not shown) or the like, and then both are fixed by a jig (not shown). Although the connector 12 can be mounted on the board 15 by soldering, the tips of the external connection terminals 121c and 122c slightly protrude from the board mounting surface 123 'of the plug insulator 123 as described above. As a result, the connection electrode 15b of the substrate 15 comes into contact from the tip end side, and as a result, there is an advantage that the solder can be connected to the substrate in a reliable and stable state.

Thereafter, by fitting the above-described jack connector 11 to the connector 12 as shown by the arrow H, the connector device 1 capable of connecting the board 15 to an electronic device (not shown) can be formed.

In order to form the first plug terminal 121 and the second plug terminal 122, an ordinary continuous press punching molding technique is often used.

FIG. 15 is a schematic diagram illustrating the state of press stamping and forming in the case of the first plug terminal 121 as an example, together with the main part of the forming die according to the present invention.

That is, in order to form the first plug terminal 121, the region of the external connection terminal 121c is thinner and weaker in strength than the other regions. The region of the plug contact 121a, the region of the insulator fixing portion 121b, and the root region of the external connection terminal 121c which follow are punched and formed as indicated by B, and then the region C indicated by a broken line is dropped to obtain the required external connection terminal 121c. Can be easily formed through a plurality of steps such as forming a region.

In this case, the mold 2 includes a lower mold 21 having a die 211 for holding the C region, and an upper mold 22 that can move up and down in the approaching / separating direction with respect to the lower mold 21. Consists of

In this case, the upper die 22 is provided with a punch 221 for pulling out the C region, and moving in a direction approaching / separating from the upper die 22 to fix the hoop material A to the die 211. And a stripper plate 222.

The die 211 is formed with a punched hole 211a for dropping the C region.

Then, the hoop material A stamped and formed to the region B is placed on the die 211 and then the stripper plate 222 is lowered with respect to the upper die 22 so that the hoop material A is moved to the lower die 21. Can be fixed.

Next, the punch 2 accompanying the lowering of the upper mold 22
By dropping the C region by the descent of 21, the first plug terminal 121 having a required external connection terminal 121c is formed.
Is formed.

FIG. 1 for explaining the overall structure of a molding die
At 6, the molding die 2 moves up and down in the approaching / separating direction with respect to the lower die 21 by using the lower die 21 on the fixed side and the guide pole 21a erected on the base 213 constituting the lower die as a guide. An upper mold 22 is provided.

The lower die 21 includes a die 211 on which the band-shaped hoop material A described with reference to FIG. 15 is mounted while being fixed to the base 213.

The die 211 is provided with a punching hole 211 for dropping the C area at a position corresponding to the C area in the hoop material A positioned and placed.
The fact that a is formed is as described with reference to FIG.

On the other hand, a punch 221 for punching out the C region is provided at a position corresponding to the punching hole 211a on the lower surface of the upper die 22 so as to protrude from the lower surface. Guide post 223
Hoop material A which is moved up and down in the approach / separation direction with respect to the upper
And a stripper plate 222 for fixing the die to the die 211 by pressing in the external connection terminal area.

Therefore, as shown in FIG.
After positioning the hoop material A on the die 211, the drive mechanism (not shown) provided on the upper die 22 lowers the stripper plate 222 to fix the hoop material A and simultaneously lower the punch 221. Then, as shown in FIG. 17B, the C region is punched out, so that only the required external connection terminal 121c can be formed as described with reference to FIG.

[0049] Then, move the stripper plate 222 is raised to the upper die 22 is raised relative to the die 211, the hoop material A exposed the one pitch or in the direction of arrow E in FIG. 15 "p _1" only Let it.

Subsequently, through the step of lowering the upper mold 22 in the same manner as described above, the connecting member 12 is moved as described with reference to FIG.
A plurality of first plug terminal blanks 121 ′ connected in a comb-like shape to 1 ″ can be formed.

By applying the above-described process to the hoop material formed for the second plug terminal, a plurality of second comb-shaped second members connected to the connecting member 122 ″ as described with reference to FIG. The plug terminal blank 122 ′ can be formed in the same manner as the first plug terminal blank 121 ′.

[0052]

FIG. 1 illustrates a problem.
8, (a) shows a state before punching the C region, and (b)
Shows the state in the middle of the C region punching, and (c) shows the state after the C region punching.

That is, in FIG. 9A, the hoop material A is positioned and fixed between the die 211 and the stripper plate 222, and the area C surrounded by the broken line of the hoop material A is a punched area. Further, as described with reference to FIG. 15, the D region remaining after the punching of the C region corresponds to a portion of the required external connection terminal 121 c as viewed in cross section.

Then, when the punch 221 passing through the stripper plate 222 of the upper mold 22 is lowered,
As shown in (b), the tip of the punch 221 is a hoop material A.
Bite into.

In this case, the hoop material A at the tip of the punch
In the D region, that is, the edge of the external connection terminal 121c on the punch biting side,
Simultaneously with the occurrence of c ′, an arrow F ₁ is inserted inside the hoop material A.
The internal stress as indicated by.

Then, when the punch 221 further descends (c)
At this point, the D region, that is, the region of the external connection terminal 121c, is punched out by the punching force and the internal stress as shown in FIG.
Arrow F ₂ direction of stress receiving results as slip on, deformation such as the D region of the external connection terminal 121c is such as shown polygonal example is likely to occur.

When the polygonal external connection terminal region is offset bent as described with reference to FIG. 14, the external connection terminal region is easily bent along the sides of the polygon. 19, it is easy to cause a fall called a flutter. As a result, as shown in the perspective view (a) and the plan view (b) of FIG. 19, the pitch between adjacent terminals is “p ₁ , p ₂ , p ₃ . And the external connection terminal 12 as shown in the side view (c) of FIG.
Variations occur in the position of the external connection terminal tip, such as the tip of 1c rising or sinking by “δ” from the substrate mounting surface 123 ′ of the plug insulator.

The same applies to the step of forming the second plug terminal 122.

Therefore, since each of the plug terminals 121 and 122 needs to be corrected before mounting on the board 15 described above, mounting on the board requires a lot of man-hours, and improvement in productivity is expected. There was a problem that it could not be done.

[0060]

An object of the present invention is to provide a molding die for molding a connector terminal blank in which external connection terminals corresponding to connection electrodes on a circuit board are connected to a connecting member in a comb-like manner. A punch that punches between the connection terminals,
A die having a punched hole corresponding to the punch, and a stripper plate for pressing and fixing the hoop material located on the die to the die in the area of the external connection terminal,
The die has a projection on a surface of the die on which the hoop material is placed, and the projection is formed in a shape capable of cutting into an external connection terminal of the hoop material pressed and fixed by the stripper plate. Is solved by the molding die.

In a method of forming a connector terminal in which external connection terminals corresponding to connection electrodes on a circuit board are connected to a connecting member in a comb-like manner, the step of punching between adjacent external connection terminals includes A method for forming a connector terminal includes a step of forming a recess in the external connection terminal region by cutting a protrusion formed on a die surface corresponding to a punch punching between external connection terminals into the external connection terminal.

Further, a connector terminal in which an external connection terminal corresponding to a connection electrode on a circuit board is connected to the connecting member in a comb shape is formed on a die surface corresponding to a punch punching between adjacent external connection terminals. The problem is solved by a connector terminal provided with a recess formed by the projection in the area of the external connection terminal.

As described with reference to FIG. 15C, the external connection terminals 121c and 122c are formed in the die 211 when the punch 221 punches out the external connection terminals 121c and 122c. Surface 211b
I was able to be confirmed experimentally that due to undergo a stress F _2, such as slide against.

In this case, slippage of the external connection terminal region with respect to the surface 211b of the die 211 due to the stress F ₂ can be suppressed by the engagement between the external connection terminal and the surface 211b of the die 211.

Therefore, in the present invention, the molding die 2 described above is used.
The plug terminal is formed by using a die in which only the die 211 is replaced with a die in which a projection protruding toward the surface 211b, that is, the external connection terminal is additionally formed in the external connection terminal region near the punched hole 211a. Like that.

This means that the projections cut into the external connection terminal area of the hoop material A located on the die 211 when the area C is punched.

Accordingly, since the slip between the external connection terminal and the surface 211b can be eliminated and the polygonalization in the external connection terminal area can be suppressed as a result, the above-described offset in the external connection terminal area can be suppressed. It is possible to suppress collapse and deformation at the time of bending, and to improve productivity as a connector.

[0068]

FIG. 1 is a view for explaining a molding die for a connector terminal according to the present invention. FIG. 2 is an enlarged partial cross-sectional view showing an external connection terminal molding region of the molding die. Is the first
FIG. 4 illustrates the operation of the stripper plate with respect to the lower mold of FIG. 3, and FIG. 5 illustrates the external connection terminal molding state in time series. FIGS. 6 and 7 are diagrams for explaining the operation and effects of the molding die shown in FIG. 1 at the external connection terminals, and FIG. 7 is a diagram for explaining an application example of the die according to the present invention.

FIG. 8 is a view showing a connector terminal blank using the molding die of FIG.

In the figures, the case where the present invention is applied to the connector device described with reference to FIG. 9 is used as an example. Therefore, the same symbols are given to the same target members and parts as those in FIGS. The description of the operation is omitted.

In FIG. 1, the connector terminal forming die 5 according to the present invention includes a lower die 51 having a die 511 for holding the C region, the punch 221 for extracting the C region, and the hoop. The upper die 22 includes the stripper plate 222 for fixing the material A to the die 511.

The reference numeral 223 denotes the stripper plate 22
2 is as described above.

In this case, as shown in FIG. 2 in which the vicinity of the punch 221 is extracted and enlarged, the die 511 has the punched hole 2 in the die 211 described with reference to FIG.
A linear projection 511b protruding toward the die surface 511a is additionally formed on one side of a region along the punched hole 211a in the vicinity of 11a, and the other configuration is the same as that of the die 211.

In this case, the linear projection 511b is
It is formed along the punched hole 211a so as to be located in the area of the external connection terminals 121c and 122c formed when the area C is punched. In this case, the linear projection 511b is formed. The width is set small enough not to affect the width of the external connection terminals 121c and 122c, and the height is set small enough not to affect the thickness of the hoop material A.

Then, as shown in FIG. 3, the above-described region C is punched in the same manner as in FIG. 14 as shown in FIG. 3 by using the molding die 5 having the die 511a having the linear projections 511b. Terminals 121c, 122c
External connection provided with a concave groove 321a 'having a size corresponding to the linear projection 511b as shown in an inner circle (a) of FIG. First plug terminal blank 321 'having terminal 321a
Can be formed.

4A and 4B for explaining the formation of the concave groove 321a 'in this case, FIG. 4A shows a state where the hoop material A is mounted on a die 511, and FIG. 4B shows a state where the stripper plate 222 is mounted. 2 shows a state in which the hoop material A is fixed on the die 511 by pressing on the hoop material A by the lowering of the hoop material.

That is, the hoop material A in FIG.
Since the region D of each external connection terminal before the region is dropped is located on the linear protrusion 511b, the external connection terminal is in a floating state.

Then, when the stripper plate 222 is lowered to fix the hoop material A on the die 511, the linear projections 511b cause the hoop material A to bite into the D region, as shown in FIG. The linear projection 511b
The hoop material A is fixed on the die 511 in a state where a concave groove 321a 'having a size corresponding to the above is formed.

On the other hand, FIGS. 5A and 5B illustrate a state in which the C region of the hoop material A fixed to the die 511 by the stripper plate 222 is punched out in chronological order. FIG. 5A shows a state before punching. Shows the state during punching, and (c) shows the state after punching.

That is, the hoop material A in FIG.
The die 511 and the stripper plate 222 are the same as in the case of
And h is positioned and fixed, but remains after punching in a region C of the hoop material A surrounded by a broken line.
As described with reference to FIG. 4, the linear protrusion 511 b described above cuts into the region.

When the punch 221 penetrating through the stripper plate 222 is lowered together with the upper die 22, the tip of the punch 221 bites into the hoop material A as shown in FIG.

[0082] Then by biting into the hoop material A of the punch tip, and at the same time anyone 121c described above in the punch biting side edges' occurs, the internal stress as shown in the inside of the hoop material A by the arrows F ₁ is generated It is also FIG.
Is the same as

However, since the D region, that is, the external connection terminal region is fixed to the die 511b in a state where the linear projections 511b bite into the D region corresponding to the external connection terminal, the arrow generated by the internal stress is generated. aforementioned "slip" in the F ₁ direction is suppressed.

Then, even when the punch 221 is further lowered, the above-mentioned "slip" is continuously suppressed. As a result, the area C is punched out in the state shown in FIG.
D region provided with 21a ', that is, required external connection terminal 3
21a can be formed as shown in FIG.

FIGS. 6A and 6B are views for explaining the offset bending state of the external connection terminals by the molding die 5, wherein FIG. 6A is a view showing the cross-sectional shape and FIG. 6B is a view showing the offset bending state.

That is, in FIG.
The groove 3 is formed on one surface (lower surface in the drawing) of the region 1a in the sheet pressure direction.
21a 'is formed along the longitudinal direction.

In the figure, the case where the concave groove 321a 'is formed near the center line in the width direction of the external connection terminal 321a is illustrated.

Thus, the required first plug terminal 321 is formed by offset bending the external connection terminal 321a region as described with reference to FIG. 14, but the bent surfaces to be offset bent are both surfaces in the plate thickness direction. H ₁ and H ₂ .

[0089] Then the plate thickness direction of both sides of this case, for example, anyone 121c top H ₁ is described above in the widthwise ends'
Although there Who between is flat and also the lower surface H ₂ is flat without protrusion based on the polygonal formulated as described in Figure 18.

Therefore, even if offset bending is performed on both surfaces H ₁ and H ₂ in the thickness direction as shown in FIG. 19B, the pitch shift between adjacent terminals described with reference to FIG. 19 does not occur.

Further, in the area of the external connection terminal 321a, work hardening due to the formation of the concave groove 321a 'occurs around the groove, so that the offset bending accuracy can be improved. As a result, FIG. There is an advantage that the lifting of the terminal tip described can be suppressed.

Therefore, it is possible to eliminate the pitch shift between adjacent terminals in FIG. 19 without modifying the plug terminals 121 and 122 before mounting on the board 15 described above, thereby realizing an improvement in productivity as a connector. Can be.

[0093] For example, from the phosphor bronze plate material having a thickness of 0.4 mm, the above-mentioned area C is dropped out to a length of 31 mm and a width of 2 mm.
When a concave groove having a depth of about 0.015 mm and a width of about 0.1 mm is formed in the external connection terminal area when the external connection terminal is formed, falling (fluttering) occurring in the external connection terminal area in the offset bending step is prevented. It has been experimentally confirmed that it is reduced to about 1/2.

FIG. 7 shows a die extracted from an application example as a molding die, (a) is an overall view, (b) is a side view,
(C) is a front eye.

In the drawing, the die 512 has the linear projections 511b of the die 511 described with reference to FIG. 3 aligned on the line corresponding to the linear projections with the same width and height as the linear projections. A plurality of projections 512a are provided.

When the area C is pulled out of the hoop material A by a molding die using the die 512 having the projection 512a, the projection 512a bites into the hoop material A and the area D of the hoop material A Since the slip between the dies 512 is suppressed, the same effect as in the case of the linear projection 511b can be obtained.

Accordingly, the assembly as a connector can be facilitated.

FIG. 8 shows the connector terminal blank formed by the molding die of FIG. 1 as viewed from the concave groove side in a blank state.
(A) is an overall perspective view, and (b) is an enlarged view of the external connection terminal area.

In the figure, the first connector terminal blank 121 'is shown.
Is formed over substantially the entire length of the external connection terminal 121c.

[0100] Therefore, for example, an area of the external connection terminal 121c position and the position of the broken line a ₂ in broken lines a ₁ and offset bending position in FIG. 6, the thickness direction of the upper surface as described above is flat, also The lower surface is flat without any convex portions as described above.

Therefore, it is possible to suppress the inclination and the deformation at the time of the offset bending, and it is possible to improve the productivity as a connector.

It is apparent that the same effect can be obtained even if the concave groove 321a 'is partially formed, for example, as the concave groove 321a "provided near the broken lines a ₁ and a _2. It is.

[0103]

As described above, according to the present invention, bending and deformation of a connector terminal in which an external connection terminal region is offset-bent at the time of the offset bending are suppressed, thereby facilitating manufacture as a connector and improving productivity. Accordingly, it is possible to provide a connector terminal molding die, a molding method, and a connector terminal which achieves the above.

In the description of the present invention, the case where the target terminal is a plug terminal is taken as an example, but it is apparent that the same effect can be obtained even if the terminal is a jack terminal.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a molding die for a connector terminal according to the present invention.

FIG. 2 is an enlarged partial cross-sectional view showing an external connection terminal forming region of a forming die.

FIG. 3 is a view for explaining a molding state of an external connection terminal of a first plug terminal together with a mold.

FIG. 4 is a view for explaining the operation of a stripper plate with respect to the lower mold of FIG. 3;

FIG. 5 is a diagram showing a state in which an external connection terminal is formed in chronological order.

FIG. 6 is a view for explaining the operation and effect of the molding die of FIG. 1 at an external connection terminal.

FIG. 7 is a diagram illustrating an application example of a die according to the present invention.

FIG. 8 is a view showing a connector terminal blank using the molding die of FIG. 1;

FIG. 9 is a diagram illustrating a configuration of the connector device together with a method of mounting the connector device on a circuit board.

FIG. 10 is a view for explaining a first plug terminal of FIG. 9;

FIG. 11 is a view for explaining a second plug terminal of FIG. 9;

FIG. 12 is a diagram illustrating the plug insulator of FIG. 9;

FIG. 13 is a view for explaining an assembling method as a connector (part 1);

FIG. 14 is a view for explaining an assembling method as a connector (part 2);

FIG. 15 is a diagram illustrating a state in which the external connection terminal of the first plug terminal is formed.

FIG. 16 is a partial cross-sectional view showing an external connection terminal molding region of a molding die.

FIG. 17 is a diagram showing the external connection terminal forming state of FIG. 15 in chronological order.

FIG. 18 is a view for explaining a problem in a conventional molding die (part 1).

FIG. 19 is a view for explaining a problem in a conventional molding die (part 2). It is.

[Explanation of symbols]

 5 Mold 21a Guide pole 22 Upper mold 51 Lower mold 121 First plug terminal 121c 'Whol 211a Punch hole 221 Punch 222 Stripper plate 223 Guide post 321 First plug terminal (connector terminal) 321' First plug terminal Blank 321a External connection terminal 321a ', 321a "Groove (recess) 511 Die 511a Die surface 511b Linear protrusion 512 Die 512a Protrusion

Claims (9)

[Claims] 1. A molding die for molding a connector terminal blank in which external connection terminals corresponding to connection electrodes on a circuit board are connected to a connecting member in a comb-like manner, and a punch for punching between adjacent external connection terminals. A die provided with a punched hole corresponding to the punch, and a stripper plate for pressing and fixing a hoop material located on the die to the die in a region of the external connection terminal, wherein the die is a member of the hoop material A connector terminal having a projection on a surface of a die on which the hoop material is pressed and fixed by the stripper plate. Molding mold. 2. The molding die for a connector terminal according to claim 1, wherein the projection is a linear projection having a length corresponding to the external connection terminal. 3. A molding die for a connector terminal, wherein the linear projection according to claim 2 comprises an alignment of a plurality of projections. 4. A method of forming a connector terminal in which external connection terminals corresponding to connection electrodes on a circuit board are connected to a connecting member in a comb-like manner, wherein the step of punching between adjacent external connection terminals includes A method for forming a connector terminal, comprising: forming a recess in the external connection terminal region by cutting a protrusion formed on a die surface corresponding to a punch punching between external connection terminals into the external connection terminal. 5. A method for molding a connector terminal, wherein the concave portion according to claim 4 is a concave groove having a length corresponding to the external connection terminal. 6. A method for forming a connector terminal, comprising forming the concave groove according to claim 5 by aligning a plurality of concave parts. 7. A connector terminal in which an external connection terminal corresponding to a connection electrode on a circuit board is connected to a connecting member in a comb shape, and is formed on a die surface corresponding to a punch punching between adjacent external connection terminals. A connector having a recess formed by the projection in a region of the external connection terminal. 8. The connector terminal according to claim 7, wherein the concave portion is a concave groove having a length corresponding to the external connection terminal. 9. The connector terminal according to claim 8, wherein the concave groove is formed by arranging a plurality of concave portions.