JP2003197344A - Terminal press-fitting jig - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To smoothly press and fit a male terminal in a hole part or the like of a connector housing without squashing its tip. <P>SOLUTION: This terminal press-fitting jig is used for pressing the male terminal 6 in the hole part of a mounting member and has a tapered space part 13 for engaging a tapered tip 12 of the terminal 6. A tapered surface 15 of the space part 13 abuts on a tapered surface 17 of the tip 12 of the terminal 6. A space 19 is formed between the bottom-side part of the space part 13 and the tip surface 18 of the terminal with the tip 12 of the terminal 6 engaged with the inside of the space part 13. The space part 13 is a tapered slot part or hole part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal press-fitting jig which is applied, for example, when a male terminal is press-fitted and fixed in a hole of a connector housing.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a board connector in which terminals of the connector are connected to a circuit board by soldering. The board connector 21 includes a connector housing 22 made of a synthetic (insulating) resin, and a pin-shaped male type made of a conductive metal (for example, a copper alloy or an aluminum alloy) press-fitted into a hole portion 24 of a base wall 23 of the connector housing 22. And a terminal 25. The connector housing 22 is of a female type having a connector fitting chamber 26 for a mating connector (not shown). The base wall 23 is located at the bottom of the connector fitting chamber 26,
In the base wall 23, a plurality of holes 24 corresponding to the number of pin-shaped terminals 25 are provided in parallel in upper and lower two stages.

The number of holes 24 may be one depending on the number of poles of the terminal 25, and may be a single stage instead of a plurality of stages. Although the shape of the hole 24 depends on the shape of the pin-shaped terminal 25, it is often a rectangular cross section. The hole 24 is the base wall 23.
Is formed so as to penetrate straight in the thickness direction, and the sectional shape (inner width dimension) of the hole 24 is set to be slightly smaller than the sectional shape (outer width dimension) of the terminal 25. The length of the hole 24, that is, the thickness of the base wall 23 is appropriately set according to the type and size of the connector 21.

The pin-shaped terminal 25 is formed straight before assembly as shown in FIG. Terminal 25
Tapered tip portions 27 are formed at both ends in the longitudinal direction. The tapered tip portion 27 has a substantially trapezoidal surface 27a on all sides, and has a narrow rectangular tip surface 28 that intersects the upper base (tip) of the trapezoidal surface 27a.

At the stage of the board connector 21 shown in FIG.
One end (front side) of 5 is inserted into a female terminal of a mating connector (not shown), and the other end (rear side) of 5 is penetrated into the hole 30 of the circuit board 29 to be soldered (see FIG. (Not shown) is connected and fixed to a circuit (not shown).

As shown in FIG. 6, one end 27 of the pin-shaped terminal 25 is pressed by a metal press-fitting jig 31, while the other end is pressed into the hole 24 of the base wall 23 of the connector housing 22. To be done. The pin-shaped terminal 25 penetrates the base wall 23 as shown in FIG. 7, and the intermediate portion in the longitudinal direction of the terminal 25 is positioned so as to fit into the hole 24 of the base wall 23 without a gap. ) Is positioned so as to project into the connector fitting chamber 26, and the other (rear side portion) is positioned so as to project to the rear of the base wall 23.

In the example of FIG. 7, a long terminal 25 is press-fitted in the upper stage of the connector housing 22, and a short terminal 25 is press-fitted in the lower stage, so that the front portion of each terminal 25 projects into the connector fitting chamber 26 with the same length. The rear portion of the upper terminal 25 is projected rearward longer than the rear portion of the lower terminal 25.

From this state, for example, using the receiving tool 34 and the bending tool 35, the rear portion of each terminal 25 is bent downward at a right angle to the required length with the receiving tool 34 as a fulcrum as shown in FIG. With this, the processing of the board terminals 25 is completed, and the front ends of the rear portions of the terminals 25 are connected and fixed to the circuit board 29 by soldering. The connector housing 22 is fixed to the circuit board 29 by fixing means (not shown) such as bolts or solder.

In the example of FIG. 4, the connecting positions of the upper and lower terminals 25 with respect to the circuit board 29 are shifted in the front and rear directions, but by shifting the upper and lower terminals 25 in the left and right direction, the connecting positions are moved in the front and rear directions. It is also possible to arrange in parallel on the left and right without displacement.

[0010]

However, in the above-described conventional terminal press-fitting jig and the terminal press-fitting method using the same, the terminal press-fitting jig 31 is more preferable than the pin-shaped terminal 25 in order to prevent wear. Since a hard material is used, when the press-fitting of the terminal 25 of FIG. 7 is completed, especially when the press-fitting is large, the tip portion 27 of the terminal 25 is likely to be crushed by compression as shown in FIG. The tip 2 of the terminal 25
8, fine burr-like protrusions 36 may be formed in the plate thickness direction. When the burr-like protrusions 36 are formed, the male connector is mated with the mating male connector as shown in FIG. The burr-shaped projection 36 of the pin-shaped terminal 25 is caught by the elastic contact portion 38 of the female terminal 37 in the connector of the mold, the mutual insertion force of the terminals is increased, and the connector fitting force (connecting the connector) as a whole. There is a concern that problems such as an increase in (force required for) and scratches on the elastic contact portion 38 of the female terminal 37 may occur. Also, the pin-shaped terminal 2
When the tip portion 27 of No. 5 is largely crushed, there is a concern that the entire length of the terminal 25 is shortened by that much and an accurate protruding length of the terminal 25 cannot be obtained.

The pin-shaped terminal 25 is not limited to being press-fitted into the base wall 23 of the female connector housing 22, but is, for example, into the hole of a flat plate plate for connecting the terminal portion of the flat wire harness. Various press-fitting forms are known, such as press-fitting and press-fitting into holes of a circuit board.
The above problems can occur even in these forms. The above problem may occur even when a pin-shaped terminal having a round cross-section or a flat (tab-shaped) male terminal 25 is used in place of the pin-shaped male terminal 25 having a rectangular cross-section. is there.

In view of the above points, the present invention can smoothly and accurately press-fit male terminals into various assembly members such as a connector housing without crushing the tips of the male terminals. An object is to provide a terminal press-fitting jig.

[0013]

In order to achieve the above object, a terminal press-fitting jig according to claim 1 of the present invention is a terminal press-fitting jig for press-fitting a male terminal into a hole of a mounting member. It is characterized in that it has a tapered space portion for engaging the tapered tip portion of the male terminal. With the above configuration, the tapered tip end portion of the terminal is engaged with the tapered space portion of the terminal press-fitting jig, so that the tip end portion of the terminal is stably supported and the collapse of the terminal tip end is prevented, The tip portion of the terminal is accurately positioned, bending of the terminal is prevented, and the accuracy of press-fitting the terminal is improved.

A terminal press-fitting jig according to a second aspect is the first aspect.
In the above described terminal press-fitting jig, the tapered surface of the space portion is in contact with the tapered surface of the tip portion of the terminal. With the above structure, the taper surface of the terminal and the taper surface of the space contact each other in surface contact or at least line contact to support the tip of the terminal, so that the terminal pressure input is received by the taper surface, or the taper surface is tapered. Since the particles are dispersed on the surface and the pressing force in the axial direction does not act on the tip (tip surface) of the terminal, crushing of the terminal tip is surely prevented. At the same time, due to the contact between the tapered surfaces, the tips of the terminals are accurately centered without rattling, and the positioning accuracy is improved.

A terminal press-fitting jig according to a third aspect is the first aspect.
Or the terminal press-fitting jig according to 2, wherein a space is formed between the bottom side portion of the space and the tip surface of the terminal in a state where the tip of the terminal is engaged in the space. Characterize. With the above configuration, since the tip surface of the terminal and the bottom surface of the space portion of the terminal press-fitting jig do not abut, the axial pressing force does not act on the tip surface of the terminal, and the terminal tip is more reliably prevented from being crushed. It

A terminal press-fitting jig according to a fourth aspect is the first aspect.
The terminal press-fitting jig described in any one of 3 to 3, wherein the space portion is a tapered groove portion or a hole portion. With the above structure, the upper and lower or left and right tapered surfaces of the tip portion of the terminal come into contact with the pair of opposed tapered surfaces of the groove portion, and the terminal tip portion is supported and positioned as described above. For example, when the upper and lower taper surfaces of the groove are brought into contact with the upper and lower taper surfaces of the terminal tip, the groove is free in the left and right directions, so the lateral displacement of the terminal press-fitting jig is absorbed and the terminal press-fitting is easy. Make sure. When using a hole, the tapered surface of the hole is in contact with the tapered surface of the terminal tip, and the terminal tip is supported vertically and horizontally, and the pressing force at the time of terminal press-fitting is firmly received by the tapered surfaces. Be dispersed or dispersed to prevent the abutting of the terminal tip, and
The tips of the terminals are positioned more accurately.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows an embodiment of a terminal press-fitting device including a terminal press-fitting jig according to the present invention.

This terminal press-fitting device 1 includes a connector feed table 2
And a terminal mounting jig 4 that can move forward and backward in the terminal insertion direction as indicated by arrow b with respect to the female connector housing 3 fixed on the connector feed base 2, the terminal mounting jig 4 and the connector feeding direction (arrow a Direction), and is provided with a terminal press-fitting jig 5 which can be moved forward and backward with respect to the connector housing 3 in the terminal press-fitting direction as indicated by arrow c.

The connector feed base 2 has a plurality of housing setting portions (not shown) on a transfer means such as a belt, and is a pin-shaped male type by a driving means (not shown) such as a servo motor. The terminals 6 can be moved in the direction in which they are arranged in a pitch for each pitch (dimensions for each pitch in the holes for press-fitting the terminals in the base wall of the connector housing 3).

The connector housing 3 of this embodiment is one in which the male terminals 6 are arranged in a single row in a single row. For the connector housing in which the male terminals 6 are arranged in a plurality of rows (see FIG. 4). It is possible to press fit the terminals 6 of each stage by moving the connector feed table 2 forward and backward in the longitudinal direction (the direction of arrow a and the opposite direction of a) by the driving means. Since the connector housing 3 and the terminal 6 are the same as those described in the related art,
The description is omitted.

The terminal mounting jig 4 and the terminal press-fitting jig 5 can be slidably moved back and forth along the parallel rails 7 and 8. The terminal mounting jig 4 is provided with a terminal holding hole 9 in a rectangular three-dimensional block portion (reference numeral 4 is used instead), and a male terminal 6 is inserted through the terminal holding hole 9 and fixed to the terminal feeding jig 4. The terminal 6 is advanced toward the connector housing 3 on the table 2 and the terminal 6 is initially inserted into the hole (not shown) in the base wall of the connector housing 3.

At the same time when the terminal mounting jig 4 retracts (returns to the original position), the connector feed base 2 advances in the direction of the arrow a, and the connector housing 3 is positioned so as to face the terminal press-fitting jig 5 and the terminal press-fitting is performed. By the forward movement of the tool 5, the terminal 6 in the hole of the base wall of the connector housing 3 is further pushed in and completely fixed by press fitting.

The terminal press-fitting jig 5 is one in which the terminal press-fitting rod 11 is horizontally projected from the front end of the rectangular solid block portion 10. The tip of the terminal 6 is attached to the tip of the terminal press-fitting rod 11.
A substantially V-shaped terminal pressing groove 13 for engaging 2 is formed (see FIG. 2). The block part 10 is for slidingly engaging the rail 8 to move the terminal press-fitting rod 11 forward and backward, and the terminal press-fitting rod 11 is a main constituent part of the terminal press-fitting jig of the present invention.

The terminal press-fitting rod 11 is formed in a rectangular cross section which is slightly larger than the pin-shaped terminal 6 and can be inserted into the connector fitting chamber 14 of the connector housing 3 each time the terminal 6 is press-fitted. As shown in FIG. 2, the groove portion 13 of the press-fitting rod 11 is positioned horizontally, has a pair of vertically facing tapered surfaces 15 in a substantially horizontal V shape, and intersects the pair of tapered surfaces 15 so that the inner portion of the groove portion 13 intersects. It has a narrow bottom surface 16 on the side.

The press-fitting rod 11 may have a round cross section or the like. Further, the direction of the press-fitting rod 11 may be rotated 90 degrees in the circumferential direction so that the groove portion 13 is positioned vertically. The insertion and press-fitting directions of the terminal 6 are not limited to the horizontal direction, but may be the vertical (vertical) direction. In that case, the pair of upper and lower tapered surfaces 15 is a pair of left and right tapered surfaces. Further, instead of the groove portion 13, it is possible to form a hole portion (not shown) having a four-sided tapered surface (15). The taper surface 15 of the groove 13 and the hole is the taper surface 1 of the tip 12 of the terminal 6.
Located corresponding to 7. The groove 13 and the hole function not only for pressing the terminal but also for positioning the terminal.

As a first example of the engaging structure of the groove portion 13 of the press-fitting rod 11 and the terminal tip portion 12, the pair of upper and lower tapered surfaces 15 of the groove portion 13 are inclined at the same angle as the tapered surface 17 of the terminal tip portion 12. The bottom surface 16 of the groove 13 is formed to have the same width as the tapered surface 17 of the terminal tip portion 12, and the same width as the narrow tip surface 18 of the terminal 6.

In the case of this example, each tapered surface 1 of the groove portion 13
5 contacts each tapered surface 17 of the terminal 6, and the bottom surface 16 of the groove portion 13 contacts the tip surface 18 of the terminal 6, and the taper surface 15 and the bottom surface 16 of the groove portion 13 wrap the tip portion 18 of the terminal 6. To support. As a result, the tip portion 12 of the terminal 6
Engages in the groove portion 13 without a gap, and prevents the tip of the terminal from being crushed when the terminal is press-fitted.

As a second example, the pair of upper and lower tapered surfaces 15 of the groove 13 are inclined at the same angle as the tapered surface 17 of the terminal tip portion 12 and are formed longer than the tapered surface 17 of the terminal tip portion 12. With the tip portion 12 engaged with the groove portion 13, a gap (space) 19 (see FIG. 3) is formed between the bottom surface 16 of the groove portion 13 and the tip end surface 18 of the terminal 6.

In the case of this example, the terminal tip portion 12 is the groove portion 1.
3 is supported only by the pair of tapered surfaces 15, and the tip end surface 18 of the terminal 6 does not abut the bottom surface 16 of the groove portion 13.
The tip surface 18 of the terminal 6 does not receive a force in the crushing direction, and the crushing of the terminal tip is more reliably prevented.

As a third example, as shown in FIG. 3, the pair of upper and lower tapered surfaces 15 of the groove 13 are inclined at a gentler angle than the tapered surface 17 of the terminal tip 12, and the taper of the terminal tip 12 is tapered. The groove 13 is formed to be longer than the surface 17, the inlet width (vertical width) H of the groove 13 is set to be approximately the same as the plate thickness T of the terminal 6, smaller than the plate thickness, or larger than the plate thickness. , The base side portion 17a of the tapered surface 17 of the terminal 6 abuts on the inlet side of the groove portion 13,
A gap 19 is formed between the bottom surface 16 of the groove portion 13 and the tip surface 18 of the terminal 6, and a slight gap is formed between the tapered surface 15 of the groove portion 13 and the tip side portion of the tapered surface 17 of the terminal 6. The tapered surface 17 of the terminal 6 is supported only on the inlet side of the groove 13.

According to this example, even if the taper surface 17 of the terminal 6 becomes loose due to variations in the inclination angle (the tip 12 becomes thin and long), the taper surface 15 of the groove portion 13 ensures the taper of the terminal 6. The surface 17 can be received, and the abutment between the tip surface 18 of the terminal 6 and the bottom surface 16 of the groove portion 13 can be eliminated, so that the tip of the terminal is prevented from being crushed. In addition, when the inclination of the tapered surface 17 of the terminal 6 is made tighter than the inclination of the tapered surface 15 of the groove 13 (the tip 12 is thicker), the tip of the tapered surface 17 of the terminal 6 is in any case. The side portion comes into contact with the tapered surface 15 of the groove portion 13 to prevent axial collapse of the terminal tip.

As a fourth example, the pair of upper and lower tapered surfaces 15 of the groove portion 13 are formed at a steeper angle than the tapered surface 17 of the terminal tip portion 12 and are formed longer than the tapered surface 17 of the terminal 6. The inlet width (upper and lower width) H of 13 is set to be equal to or smaller than the plate thickness T of the terminal 6 or larger than the plate thickness, and the terminal tip 12 is engaged with the groove 13 while the groove 13 is formed. The tip end side portion of the tapered surface 17 of the terminal 6 contacts the tapered surface 15 of the terminal 6, and the bottom surface 16 of the groove portion 13 and the terminal 6
A gap 19 is formed between the taper surface 15 of the terminal 6 and the tapered surface 15 of the groove 13 and a slight gap is formed between the taper surface 17 of the terminal 6 and the base side portion 17a of the taper surface 17 of the terminal 6. The tip side portion of 17 is supported by the bottom side portion of the tapered surface 15 of the groove 13.

In the case of this example, as in the case where the taper surface 17 of the terminal 6 is steeply inclined, the taper surface 1 of the terminal 6 is formed.
The tip side portion of 7 comes into contact with the tapered surface 15 of the groove portion 13,
Axial collapse of the terminal tip is prevented.

The tip surface 18 of the terminal 6 as in the first example described above.
Rather than contacting the bottom surface 16 of the groove portion 13, a gap 19 is provided between the tip surface 18 of the terminal 6 and the bottom surface 16 of the groove portion 13 as in the second to fourth examples, and the tapered surface 15 of the groove portion 13 is provided. It can be said that the effect of preventing the terminal tip from being crushed is higher when the terminal 6 is supported by the contact between the terminal 6 and the tapered surface 17 of the terminal 6.

In each of the above-mentioned examples, when the hole portion (not shown) having a four-sided tapered surface is used in place of the groove portion 13, the function and effect are the same as in each of the above-mentioned examples. The hole is a recess that does not penetrate, but even if the bottom side of the hole penetrates like a hole in the longitudinal direction of the terminal press-fit rod (11) and there is no bottom surface 16, that is, even if it is a hole, There is no problem in use. The groove portion 13, the hole portion and the hole portion are broadly defined as a space portion for engaging with the terminal tip portion 12.

Since the above-described configuration examples prevent the tip of the male terminal 6 from being crushed, a female connector having the male terminal 6 and a male connector having the mating female terminal are provided. When mated with (not shown), the insertion and connection operation of both terminals is performed smoothly without catching, which prevents increase of terminal insertion force, that is, increase of connector mating force, and smooth mating of both connectors. At the same time, the damage of the elastic contact portion of the female terminal is prevented, and the reliability of the electrical connection is ensured.

In the above embodiment, the pin-shaped terminal 6 is press-fitted into the female connector housing 3 as an assembling member, but the present invention is not limited to this. For example, an assembly such as a plate or a circuit board is assembled. The present invention can also be applied to a mode in which a pin-shaped terminal 6 or a flat-plate (tab-shaped) terminal (not shown) is press-fitted into a member (not shown).

Further, the terminal press-fitting device 1 of FIG. 1 is only one form using the terminal press-fitting jig 5, and the terminal press-fitting rod 11 itself of FIG. 1 is used as the terminal press-fitting jig, and the terminal press-fitting jig is pressed or the like. The terminal 6 is moved forward and backward by the pressing means (not shown) of
It is also possible to drive into the hole of the connector housing 3 or the like.

Instead of the terminal 6 having a rectangular cross section, a terminal having a round cross section (not shown) can be used.
In this case, the hole portion or the hole portion of the terminal press-fitting jig may have a conical shape along the substantially conical tip tapered surface of the round terminal. Further, each of the above-mentioned configurations is also effective as a terminal press-fitting method.

[0040]

As described above, according to the first aspect of the present invention, the tip of the terminal is stably supported and the crush of the tip of the terminal is prevented. In addition, the insertion and connection with the mating terminal can be performed smoothly without being caught, and the contact area is reduced due to scratches on the terminal resulting in poor contactability and the increase in connector mating force prevents deterioration of connector mating workability. It Further, the tip end portion of the terminal is accurately positioned, and the accuracy of press-fitting the terminal is increased, which also ensures the reliability of the connection.

According to the second aspect of the present invention, the terminal pressure input is received by the tapered surface or dispersed by the tapered surface, and the axial pressing force does not act on the tip (tip surface) of the terminal. Crushing of the tip of the terminal is reliably prevented, and at the same time, the positioning accuracy of the tip of the terminal is improved, and the press-fitting accuracy of the terminal is improved. By these, the effect of the invention according to claim 1 is promoted.

According to the invention of claim 3, the crushing of the tip of the terminal is prevented more reliably, and the effect of the invention of claim 1 is further promoted. According to the invention described in claim 4, for example, the groove allows the terminal tip portion to be free in the one-dimensional direction, facilitates the engagement between the terminal press-fitting jig and the terminal tip end portion, simplifies the terminal press-fitting device, and reduces the cost. Be converted.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a terminal press-fitting device according to the present invention.

FIG. 2 is a side view of essential parts showing a state in which the tip of the terminal is engaged with the terminal press-fitting jig according to the present invention.

FIG. 3 is a side view of essential parts showing a state in which the tip of the terminal is engaged with the terminal press-fitting jig, that is, a state when the terminal is press-fitted.

FIG. 4 is a vertical cross-sectional view showing one embodiment of a board connecting connector.

FIG. 5 is a perspective view showing one form of a pin-shaped male terminal.

FIG. 6 is a side view of essential parts showing a state in which a terminal is pressed by a conventional terminal press-fitting jig.

FIG. 7 is a vertical cross-sectional view showing a step of bending after press-fitting the terminal into the connector housing.

FIG. 8 is a side view of a main part of a terminal showing a problem in a press-fitting method using a conventional terminal press-fitting jig.

FIG. 9 is a sectional view of an essential part showing a state in which a male terminal is similarly inserted and connected to a female terminal.

[Explanation of symbols]

3 Connector housing (assembly member) 5-terminal press-fitting jig 6 Male terminals 11-terminal press-fitting rod 12 Tip 13 Groove (space) 15 Tapered surface 17 Tapered surface 18 Tip surface 19 Gap (space)

Claims (4)

[Claims] 1. A terminal press-fitting jig for press-fitting a male terminal into a hole of an assembling member, wherein a tapered space portion for engaging a tapered tip end portion of the male terminal is provided. A terminal press-fitting jig having. 2. The terminal press-fitting jig according to claim 1, wherein the tapered surface of the space contacts the tapered surface of the tip of the terminal. 3. A space is formed between a bottom side portion of the space and a tip surface of the terminal in a state where the tip of the terminal is engaged in the space. 1 or 2
The described terminal press-fitting jig. 4. The terminal press-fitting jig according to claim 1, wherein the space portion is a tapered groove portion or a hole portion.