JP3441789B2 - Connector terminal joining method and connector terminal structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector terminal joining method and a connector terminal structure for ultrasonically joining a lead wire connected to a substrate or the like arranged in a resin case to a connector terminal. Regarding

[0002]

2. Description of the Related Art A conventional connector terminal joining method and connector terminal structure are such that a lead wire connected to a substrate or the like disposed in a resin case and a connector terminal are soldered or spot-welded at the connection portion. Alternatively, they are connected by ultrasonic bonding.

[0003]

In the conventional connector terminal joining method and connector terminal structure described above, when ultrasonic joining is performed, a resin surface is formed on the back surface of the connecting portion between the lead wire and the connector terminal. Therefore, when ultrasonic bonding is performed at the connecting portion between the lead wire and the connector terminal, the resin surface elastically deforms and absorbs vibration, so that the bonding cannot be performed well and the bonding strength is low. There was.

Therefore, the inventors of the present invention arranged an insulating material harder than resin in a resin case in a portion facing the back surface of the connecting portion between the lead wire and the connector terminal, or on the surface of the connecting portion of the connector terminal. Focusing on the technical idea of the present invention that enables ultrasonic bonding by increasing the surface pressure by providing unevenness, as a result of further research and development, as a result, the connecting portion of the lead wire and the connector terminal The present invention has reached the purpose of enabling ultrasonic bonding and achieving the purpose of increasing the bonding strength of the connecting portion between the lead wire and the connector terminal.

[0005]

The method for joining connector terminals according to the present invention (the first invention according to claim 1) increases the surface pressure at the time of joining on the back surface of the connecting portion of the connector terminal .
The base member of insulating material having a volume with harder than because the resin integrally molded to the resin-made case, the other end of the the upper surface of the connection portion of the connector terminal, the lead wire having one end to the substrate is connected And applying a constant load to a portion of the other end of the lead wire corresponding to the connecting portion of the connector terminal, and applying ultrasonic vibration to the connecting portion of the connector terminal and the other end of the lead wire . Is to join.

According to the connector terminal joining method of the present invention (the second invention according to claim 2), the surface of the connecting portion of the connector terminal is provided with irregularities and the upper surface of the connecting portion of the connector terminal is connected to the substrate. A lead wire is disposed, a constant load is applied to a portion of the lead wire corresponding to the connector terminal connection portion, and ultrasonic vibration is applied to join the connector terminal connection portion and the lead wire. It is a thing.

According to the connector terminal structure of the present invention (the third invention according to claim 3), the base member made of an insulating material harder than resin faces the portion integrally molded with the resin case. Connector terminal where the connection part is arranged,
A lead wire connected to a substrate and ultrasonically bonded to the upper surface of the connecting portion of the connector terminal.

The connector terminal structure of the present invention (the fourth invention according to claim 4) is a connector terminal provided with a connecting portion having an uneven surface, and is connected to a substrate. And a lead wire ultrasonically bonded to the surface on which the unevenness of the portion is formed.

[0009]

[Action] bonding method of the connector terminal of the first invention having the above structure, together with harder than the resin for increasing the surface pressure at the time of joining the rear surface of the connecting portion of the connector terminal
And integrally molding the base member of insulating material having a capacity for the resin case, the upper surface of the connecting portion of the connector terminal, the lead wire having one end connected to the substrate
The other end is arranged, and a constant load is applied to a portion of the other end of the lead wire corresponding to the connecting portion of the connector terminal, and ultrasonic vibration is applied to the connecting portion of the connector terminal and the lead wire. The other end is joined.

In the connector terminal joining method according to the second aspect of the present invention, the surface of the connecting portion of the connector terminal is provided with irregularities, and the surface of the connecting portion of the connector terminal having irregularities is connected to a substrate. The lead wire is arranged, and while applying a constant load to a portion of the lead wire corresponding to the connecting portion of the connector terminal, ultrasonic vibration is applied to the connecting portion of the connector terminal and the lead wire. Is to join.

In the connector terminal structure of the third invention having the above structure, a base member made of an insulating material harder than resin is integrally molded with a resin case on the back surface of the connecting portion of the connector terminal, The lead wire connected to the substrate is ultrasonically bonded to the upper surface of the connection portion integrally molded with the insulating material of the connector terminal.

In the connector terminal structure of the fourth invention having the above structure, the surface of the connecting portion of the connector terminal has irregularities, and the lead wire connected to the substrate has the irregularities of the connector terminal. It is ultrasonically bonded to the upper surface of the formed connecting portion.

[0013]

The method for joining connector terminals according to the first aspect of the present invention, which has the above-described operation, is a method for joining the connector terminal and the lead wire.
Said connection portion bonding to opposite made of the resin case to the other end of
It is harder than resin and has a capacity to increase the surface pressure
Since a base member made of an insulating material is integrally molded and ultrasonically vibration is applied to the rigidly-bonded base member integrally molded, the base member made of resin is bonded. It is possible to ultrasonically bond the connecting portion between the lead wire and the connector terminal in the case.

In the connector terminal joining method of the second aspect of the invention, which has the above-described action, the surface of the connecting portion between the connector terminal and the lead wire is provided with irregularities, and ultrasonic vibration is applied to the convex portion of the connecting portion. Since they are joined together, there is an effect that the ultrasonic joining can be performed by the convex portion having a high surface pressure at the connecting portion between the lead wire and the connector terminal in the resin case.

In the connector terminal structure according to the third aspect of the present invention, the lead wire connected to the substrate is provided on the upper surface of the connection portion integrally molded with the hard base material of the insulating material of the connector terminal. Since ultrasonic bonding is performed with a high surface pressure, there is an effect that the bonding strength of the connecting portion between the lead wire and the connector terminal is high.

In the connector terminal structure according to the fourth aspect of the present invention, the lead wire connected to the substrate is ultrasonically joined by the convex portion with high surface pressure of the connecting portion of the connector terminal in which the irregularities are formed. Therefore, there is an effect that the joint strength of the connecting portion between the lead wire and the connector terminal is high.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) As shown in FIGS. 1 to 4, in the connector terminal structure and the connector terminal joining method of the first embodiment, a ceramic member 4 made of resin is used as a base member of an insulating material harder than resin. Connector terminal 2 in which a connecting portion 21 is arranged so as to face a portion integrally molded with the case 1 and the resin case 1
The lead wire 3 is connected to the substrate 20 disposed inside and is ultrasonically bonded to the upper surface of the connecting portion 21 of the connector terminal 2.

The resin case 1 is composed of a bottomed resin rectangular box body 10, a connector portion 11 is formed at one end, and a thick portion 14 is formed below the connector portion 11. The connector portion 11 is provided on the bottom portion 12 of the box body 10.
The substrate 20 on which a large number of terminals 201 are arranged is arranged at an end portion close to, and a lid member 13 is placed on the upper portion via a seal 131.

As shown in FIGS. 1 and 2, the ceramic member 4 is constituted by a rectangular member 40, and the groove 1 formed at the right end of the thick portion 14 of the resin case 1 is formed.
5 to form a shoulder portion 16 of the thick portion 14.

The connector terminal 2 is composed of a large number of L-shaped connector pins arranged alternately in two rows.
The ceramic member is disposed in the connector portion 11 at one end of the resin case 1, one vertical end thereof is exposed to the connector portion 11, and the other horizontal end thereof is the thick portion 14 of the resin case 1. The shoulder 1 constituted by 4
Exposed to the horizontal surface of 6.

The lead wire 3 corresponds to the connector terminal 2
And a conductor sheet 3 in which a large number of lead wire portions corresponding to the terminals 201 of the substrate 20 are formed on a resin film.
It is composed of 0s.

Next, in the method of joining the connector terminals, as shown in FIG. 3, a ceramic member 4 which is harder than resin is molded integrally with the resin case 1 on the back surface of the connecting portion 21 of the connector terminal 2. Then, on the upper surface of the connection portion 21 of the connector terminal 2, the terminal 201 of the substrate is
Conductor sheet 3 forming the lead wire previously connected to
0 is arranged, the fixing block 50 is brought into contact with the lower portion of the portion where the ceramic member 4 is integrally molded, and the ultrasonic generator 5 is attached to the portion of the conductor sheet 30 corresponding to the connecting portion 21 of the connector terminal 2. The ultrasonic horn 51 is abutted to apply a constant load, and ultrasonic vibration is applied to connect the connector terminal and the conductor sheet 30.
Is to join and.

That is, in the ultrasonic generator 5, 20 k output from the ultrasonic oscillator 53 as shown in FIG.
An ultrasonic signal of Hz is converted into mechanical vibration by an electrostrictive conversion unit 52 fixed to the base of the ultrasonic horn 51, and this mechanical vibration is inserted into the resin case 1 in a longitudinal section. The trapezoidal ultrasonic horn 51 expands the amplitude, and the expanded ultrasonic vibration is applied from the tip of the ultrasonic horn 51 to the conductor sheet 30 sandwiched between the fixed block 50 and the conductor. The sheet 30 is joined to the connecting portion 21 of the connector terminal 2.

The connector terminal structure of the first embodiment is as follows.
The conductor sheet 30 connected to the substrate 20 is ultrasonically bonded to the upper surface of the connection portion 21 integrally molded with the hard ceramics member 4 of the connector terminal 2 with high surface pressure. There is an effect that the joint strength of the connection portion 21 between the connector 30 and the connector terminal 2 is high.

In the connector terminal joining method of the first embodiment, the resin case 1 facing the connecting portion 21 between the connector terminal 2 and the conductor sheet 30 has a connecting portion 21 made of a hard insulating material. Since the ultrasonic vibration generator 5 applies ultrasonic vibration to the joint portion 21 integrally molded and molded in the case 1, the conductor sheet is formed in the resin case 1. This has the effect of enabling simultaneous bonding by ultrasonic waves of the connecting portions 21 between the large number of 30 lead wires and the large number of connector terminals 2.

In the connector terminal joining method of the first embodiment, since the ultrasonic joining is directly performed at the tip of the ultrasonic horn 51, the joining efficiency is high, and the troublesome resonance for mounting the vibrator at the tip of the horn. This has the effect of eliminating the need to take the work.

In the connector terminal joining method of the first embodiment, the connecting portion 21 of the connector terminal 2 in which the ceramic member 4 is integrally molded and the substrate 2 are formed.
The conductor block 30 connected to the fixed block 5
Since ultrasonic bonding is performed in a state of being sandwiched between 0 and the ultrasonic horn 51, ultrasonic energy can be effectively applied to effectively connect the connector terminal 2 and the conductor sheet 30. Produce an effect.

(Second Embodiment) In the connector terminal structure and connector terminal joining method of the second embodiment, as shown in FIG. 5, in the first embodiment, the ceramic member 4 is placed in a case 1 made of resin. While integrally molded so as to be placed in the groove 15, it is entirely formed of a glass member 41 as an insulating material, penetrating a portion of the connector terminal 2 facing the connecting portion 21. Since the capacity of the insulating base member is larger than that of the first embodiment, there is an effect that the joint strength between the connector terminal 2 and the conductor sheet 30 is further increased as compared with the first embodiment.

(Third Embodiment) As shown in FIGS. 6 and 7, the connector terminal structure and the connector terminal joining method of the third embodiment are such that a knurling process is applied to the surface and a large number of linearly intersecting lines are formed. It is connected to a connector terminal 2 provided with a connecting portion 22 having a convex portion and a substrate 20 arranged in the resin case 1, and ultrasonically bonded to the upper surface of the connecting portion 21 of the connector terminal 2. The conductor sheet 30 serves as the formed lead wire 3.

Next, in the method of joining the connector terminals, the surface of the portion corresponding to the connection portion 22 of the connector terminal 2 is knurled to form a large number of linear convex portions obliquely intersecting with each other. On the upper surface of the connection portion 22 of the terminal 2, the conductor sheet 30 that constitutes the lead wire, one end of which is connected to the terminal 201 of the substrate in advance, is arranged, and corresponds to the connection portion 22 of the connector terminal 2 of the conductor sheet 30. The tip of the vibrator 55 fixed to the ultrasonic horn 51 of the ultrasonic generator 5 is brought into contact with the portion to apply a constant load, and ultrasonic vibration is applied to the connecting portion of the connector terminal and the conductor sheet 30. Is to join.

That is, in the ultrasonic wave generator 5, the magnetostrictive strain conversion portion 5 fixed to the base portion of the ultrasonic horn 51 is an ultrasonic electric signal output from the ultrasonic oscillator 53.
The mechanical vibration is converted into mechanical vibration by 2, the amplitude of the mechanical vibration is expanded by the ultrasonic horn 51, and the expanded ultrasonic vibration of the conductor sheet 30 for ultrasonic bonding fixed to the ultrasonic horn 51. The rectangular conductor 55 having a length corresponding to the length is applied to the conductor sheet 30 sandwiched between a fixed block (not shown) and the conductor sheet 30 from the tip end of the rectangular conductor 55, as in the first embodiment. The sheet 30 is connected to the connector terminal 2 by the knurled connection portion 22.
Is to be joined to.

The connector terminal structure of the third embodiment is as follows.
The conductor sheet 30 connected to the substrate 20 is ultrasonically bonded to each convex portion of the connecting portion 22 in which a large number of fine convex portions are formed by the knurling of the connector terminal 2 with high surface pressure. Therefore, the conductor sheet 3
There is an effect that the joint strength of the connection portion 22 between 0 and the connector terminal 2 is high.

Further, in the connector terminal structure of the third embodiment, since a large number of diagonally intersecting convex portions are formed on the connecting portion 22 and the convex portions are joined to the conductor sheet 30, the directional property is improved. Since it does not have any effect, it has the effect of having uniform strength against forces in all directions.

In the connector terminal joining method of the third embodiment, the connection portion 22 between the connector terminal 2 and the conductor sheet 30 is knurled, and the connection portion 22 having such a large number of protrusions is formed. Since the ultrasonic vibration is applied by the ultrasonic vibration generator 5 to join the conductor sheet 3 and the conductor sheet 3 in the resin case 1.
There is an effect that it is possible to simultaneously join the connecting portions 22 of the large number of lead wires of 0 and the large number of connector terminals 2 by ultrasonic waves.

In the connector terminal joining method of the third embodiment, if each connector terminal 2 is knurled in advance, it is sufficient to simply dispose the conductor sheet 30 and perform ultrasonic joining. The effect is that the joining is very easy.

Further, in the connector terminal joining method of the third embodiment, a vibrator 55 having a sufficient length in consideration of the depth of the resin case 1 is arranged at the tip of the ultrasonic horn 51. Therefore, there is an effect that insertion into the resin case 1 and ultrasonic bonding can be easily performed.

(Fourth Embodiment) As shown in FIG. 8, the connector terminal structure and the connector terminal joining method of the fourth embodiment are the same as the connector terminal 2 in the third embodiment.
While a large number of linear projections diagonally intersecting each other are formed in the connecting portion 22 of the connector terminal 2, the connecting portion 22 of the connector terminal 2 has a large number in a direction (lateral direction) perpendicular to the axial direction of the connector terminal 2. It forms a linear protrusion,
In addition to the same operational effect as the third embodiment, a large number of lateral projections are formed, so that the strength with respect to the axial force of the connector terminal 2 is high.

(Fifth Embodiment) As shown in FIG. 9, the connector terminal structure and the connector terminal joining method of the fifth embodiment are the same as those of the connector terminal 2 in the third embodiment.
While a large number of linear projections diagonally intersecting each other are formed in the connection part 22 of the above, the connection part 22 of the connector terminal 2 is formed with a large number of linear projections in the axial direction of the connector terminal 2. In addition to the same operational effect as the third embodiment, a large number of axial projections are formed, so that the connector terminal 2 has high strength against a force perpendicular to the axial direction (lateral direction). Has the effect.

The embodiments described above are merely examples for the purpose of explanation, and the present invention is not limited to them. Those skilled in the art will recognize from the claims, the detailed description of the invention and the description of the drawings. Modifications and additions can be made without departing from the technical idea of the present invention.

Although a conical ultrasonic horn has been described as an example in the above embodiment, the present invention is not limited to this, and for example, a weld horn 56 (20 kHz, RECT type) shown in FIG. 10 or a step type is used. A horn, an exponential type horn, a cathedral type horn, a Fourier type horn and others can be adopted.

In the above-described embodiment, an example in which the concavities and convexities are formed on the connection portion 22 of the connector terminal 2 by knurling has been described as an example, but the present invention is not limited thereto and, for example, the concavities and convexities are previously formed on the mold. It is possible to adopt any method as long as it can be pressure-molded using the mold and can form irregularities on the other surface.

Although the ceramic member and the glass member have been described as the insulating material in the above-mentioned embodiments, the present invention is not limited thereto, and an insulating material harder than a resin case, for example, having a Vickers hardness of 150 Hv or more can be used. Can be adopted.

[Brief description of drawings]

FIG. 1 is a sectional view showing a resin case having a connector terminal structure according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged view showing a connecting portion of the connector terminal structure of the first embodiment.

FIG. 3 is a sectional view for explaining ultrasonic bonding in the connector terminal bonding method of the first embodiment.

FIG. 4 is a plan view showing the connector terminal structure of the first embodiment.

FIG. 5 is a partial enlarged view showing a connecting portion of the connector terminal structure of the second embodiment of the present invention.

FIG. 6 is a partial plan view showing a connecting portion of a connector terminal structure according to a third embodiment of the present invention.

FIG. 7 is a sectional view for explaining ultrasonic bonding in the connector terminal bonding method of the third embodiment.

FIG. 8 is a partial plan view showing a connecting portion of a connector terminal structure according to a fourth embodiment of the present invention.

FIG. 9 is a partial plan view showing a connecting portion of a connector terminal structure according to a fifth embodiment of the present invention.

FIG. 10 is a perspective view showing a modified example of the ultrasonic horn.

[Explanation of symbols]

1 resin case 2 connector terminals 3 lead wire 4 Ceramics member 5 Ultrasonic generator 20 substrates 21,22 Connection 41 glass member 51 ultrasonic horn 55 oscillator

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-4-18697 (JP, A) JP-A-4-212277 (JP, A) JP-A-1-220494 (JP, A) JP-A-2- 170501 (JP, A) JP-A-4-260361 (JP, A) JP-A-54-159683 (JP, A) JP-A-3-502623 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 43/02 H01R 4/02 H01R 12/04

Claims (4)

(57) [Claims] 1. On the rear surface of the connecting portion of the connector terminal
Harder than resin to increase surface pressure at the time of joining and capacity
The base member made of an insulating material is integrally molded in a resin case, and the other end of the lead wire, one end of which is connected to the substrate, is arranged on the upper surface of the connecting portion of the connector terminal. Then, while applying a constant load to a portion of the other end of the lead wire corresponding to the connecting portion of the connector terminal, ultrasonic vibration is applied to the connecting portion of the connector terminal and the lead wire .
A method of joining a connector terminal, which comprises joining the other end . 2. The surface of the connecting portion of the connector terminal is provided with irregularities, and the lead wire connected to the substrate is arranged on the upper surface of the connecting portion of the connector terminal, and the lead wire corresponds to the connecting portion of the connector terminal. A method for joining connector terminals, characterized in that a constant load is applied to the portion to be joined and ultrasonic vibration is applied to join the connecting portion of the connector terminal and the lead wire. 3. A connector terminal, in which a connecting portion is arranged so as to face a portion where an insulating base material that is harder than resin is integrally molded with a resin case, is connected to a substrate, and the connector is provided. A connector terminal structure comprising a lead wire ultrasonically bonded to an upper surface of the connection portion of the terminal. 4. A connector terminal provided with a connection portion having an uneven surface, and a lead wire connected to a substrate and ultrasonically bonded to the uneven surface of the connection portion of the connector terminal. Connector terminal structure characterized by being composed of.