JPH098475A - Pitch control method of electronic component terminal run - Google Patents

Abstract

PURPOSE: To obtain an electronic component terminal run accurate in terminal pitch. CONSTITUTION: Terminals 11 are blanked out of a hoop material like a terminal run as they are linked together with an connector 23. After the terminal run is blanked out, when the connector 23 is warped as shown by a dashed line b, a dent 32 is provided to the connector 23 to correct the connector 23 of warpage. By this setup, the terminals 11 are adjusted in terminal pitch to a prescribed design value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pitch control method for a terminal string for an electronic component such as a ceramic oscillator, a ceramic resonator or a ladder type filter.

[0002]

2. Description of the Related Art Conventionally, in an oscillator, a resonator and a filter operating in the KHz band, a piezoelectric element operating in a thickness vibration mode is sandwiched and held by a pair of terminals. This terminal
In the manufacturing process, as shown in FIGS. 8 (A) and 8 (B), a plurality of terminals 1 are punched out from a hoop material in a state of being connected at a predetermined pitch by connecting portions 2, and then housed in a case together with a piezoelectric element. , The connection part 2 is separated.

[0003]

By the way, in the terminal strip shown in FIG. 8, an error occurs in the pitch of the terminals 1 in the press working on the hoop material, and when the error is accumulated, the housing position in the case is increased. And so on, resulting in trouble in assembly and deterioration of product characteristics. The deviation of the pitch of the terminals 1 may occur due to an error in the accuracy of the press machine, or the connection part 2 may be warped due to variations in the material of the hoop material, as shown by the chain lines a and b in FIG. 8 (A). 8
This is caused by the bending of the connecting portion 2 as shown by the dashed lines c and d in FIG. It is also caused by twisting of the connecting portion.

In order to solve these problems, it is necessary to use a highly accurate mold, use a hoop material of good quality without distortion, and control the environment such as temperature, humidity and cleanliness in the factory. However, the facility cost, material cost, and management cost will increase significantly, which is not practical.

Therefore, an object of the present invention is to provide a pitch control method capable of obtaining a terminal strip having an accurate pitch by using a current press machine or hoop material.

[0006]

In order to solve the above-mentioned object, a pitch control method for a terminal station according to the present invention is directed to a terminal station punched from a hoop material into a predetermined shape by press working. The feature is that the pitch between terminals is adjusted. It is preferable to adjust the inter-terminal pitch by detecting an error in the inter-terminal pitch, warpage, bending, and twist of the connecting portion by an optical sensor or the like, and performing the adjustment according to the detected value.

In order to adjust the pitch between terminals, a dent is made in the connecting portion by press working, a notch is formed, or a heater, hot air, or laser light is applied, or a partial pressure treatment is performed with a roller pair. By means such as performing. The portion subjected to this type of processing slightly extends, and the pitch between terminals is adjusted to a predetermined design value.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a pitch control method for a terminal string according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a terminal 1 obtained by applying the present invention.
1 shows a ceramic resonator assembled using Nos. 1 and 13.
This resonator operates in the KHz band, and the inner case 10
The terminal 11, the ceramic resonant element 12, and the terminal 13 are stacked and accommodated, the opening of the inner case 10 is closed by the inner lid 14, further covered by the outer case 15, and sealed by the sealing resin 16.

By the way, the terminal 11 is manufactured by the following steps (the same applies to the terminal 13). The manufacturing process shown in FIG. 2 adopts a mode in which a pair of terminal stations are punched simultaneously on both sides in order to save material waste, and two terminals 11 are formed in each step. However, the number of terminals 11 molded simultaneously may be two or more.

In FIG. 2, the feed hole 21 is first punched in the hoop material 20 in step (a). Next, in step (b), the convex portion 11a for elastically holding the resonant element 12 is formed. Next, in step (c), the pilot hole 22 is punched out, and in step (d), the other portion is punched out to mold the terminal 11. At this time, each terminal 11
Is integrally connected to the connecting portion 23 by the external connecting portion 11b and is molded as the terminal connecting portion 25.

The terminal station 25 manufactured as described above thereafter optically detects the pitch error of each terminal 11 and the warp, bend, and twist of the connecting portion 23 by using sensors. If the terminals 11a, 11b, 11c have a narrow pitch as shown in FIG.
A dent 31 is formed in the connecting portion 23 corresponding to between b and 11c. The dents 31 are easily formed by punching, and the depth and size thereof are determined according to the error from the design value of the pitch between terminals. In this case, the dents 31 are preferably formed on the front and back surfaces of the connecting portion 23.

As shown in FIGS. 4 and 5, the connecting portion 2
When 3 is warped in the direction indicated by the alternate long and short dash line b,
This means that the pitch of the terminals 11 is narrower than necessary. In this case, if the dent 32 is formed on the upper piece of the connecting portion 23 (see FIG. 4) or the notch 33 is formed (see FIG. 5), the warp is corrected and the pitch of the terminals 11 is set to a predetermined value. It will be adjusted to the design value.

When the connecting portion 23 has a warp in the direction opposite to the one-dot chain line b, forming a dent or a notch on the lower side of the connecting portion 23 corrects the warp, and thus the terminal 11 is formed. The pitch of will be adjusted. Alternatively, instead of the dent 31, the portion may be pressed by a pair of rollers, or a heater, hot air, or laser light may be applied to adjust the pitch between terminals. Further, a similar effect can be obtained by applying a heater, hot air, or laser light instead of the dent 32 and the notch 33 shown in FIGS.

FIG. 6 shows a correction method when the connecting portion 23 is bent in the direction of the alternate long and short dash line d. In this case, the recess 34 or the dent may be formed by punching so that the concave side of the flexure extends.

FIG. 7 shows a case where the connecting portion 23 is twisted. By forming a dent 35 or a recess so that the concave side of the twist extends, the twist can be corrected and the pitch between terminals can be adjusted. Of course, the flexure and twist shown in FIGS. 6 and 7 can also be corrected by applying a heater, hot air, or laser light to the concave surface side.

[0017]

As is apparent from the above description, according to the present invention, the error in the pitch between terminals, the warp, the deflection,
Since the pitch between terminals is adjusted according to the twist, it is possible to correct the pitch between terminals to the design value, which in turn leads to misalignment of terminals during the assembly process and deterioration of product characteristics due to misalignment. There is nothing to do.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a ceramic resonator incorporating a terminal obtained by the present invention.

FIG. 2 is an explanatory view showing a step of punching a terminal string from a hoop material as a previous step using the pitch control method according to the present invention.

FIG. 3 is a front view showing an example of a pitch control method according to the present invention.

FIG. 4 is a front view showing another example of the pitch control method according to the present invention.

FIG. 5 is a front view showing still another example of the pitch control method according to the present invention.

FIG. 6 is a sectional view showing still another example of the pitch control method according to the present invention.

FIG. 7 is a perspective view showing still another example of the pitch control method according to the present invention.

FIG. 8 shows a conventionally used terminal string, (A) is a front view and (B) is a bottom view.

[Explanation of symbols]

 11, 13 ... Terminal 20 ... Hoop material 21 ... Feed hole 23 ... Connection part 25 ... Terminal connection 31, 32, 35 ... Ditch 33 ... Notch 34 ... Recess

Claims (7)

[Claims] 1. A method for manufacturing a terminal string in which terminals for elastically sandwiching and holding an electronic functional element are punched out from a hoop material in a state where they are connected at a predetermined pitch at a connecting portion. After punching, the pitch between terminals is adjusted according to the error in pitch between terminals, warpage, bending, and twisting of the connecting part. 2. The pitch control method for a terminal string for electronic parts according to claim 1, wherein the pitch between terminals is adjusted by subjecting the connecting portion to a mechanical treatment. 3. The pitch control method for a terminal string for electronic parts according to claim 1, wherein the pitch between terminals is adjusted by subjecting the connecting portion to a heat treatment. 4. The pitch control method for a terminal string for electronic parts according to claim 1, wherein the inter-terminal pitch is adjusted by applying a pressure treatment to the connecting portion. 5. A method of manufacturing a terminal string in which terminals for elastically sandwiching and holding an electronic functional element are punched out from a hoop material in a state where they are connected at a predetermined pitch at a connecting portion. A pitch control method for a terminal string for electronic parts, comprising: mechanically treating the connecting portion after punching into a plurality of parts to adjust a pitch between terminals. 6. A method of manufacturing a terminal string in which terminals for elastically sandwiching and holding an electronic functional element are punched out from a hoop material in a state of being connected at a predetermined pitch at a connecting portion, wherein the terminal string is formed into a predetermined shape from the hoop material. After the punching, the pitch between the terminals is adjusted by subjecting the connecting portion to a heat treatment. 7. A method of manufacturing a terminal string in which a terminal for elastically sandwiching and holding an electronic functional element is punched out from a hoop material in a state of being connected at a predetermined pitch at a connecting portion, wherein the terminal string is formed into a predetermined shape from the hoop material. A pitch control method for a terminal string for an electronic component, comprising the step of: after punching out, adjusting the pitch between terminals by applying a pressure treatment to the connecting portion.