JP3412394B2 - Connection unit for continuity withstand voltage test - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection withstand voltage test connection unit, and more particularly to a connection withstand voltage test of a flexible flat cable (FFC) and a flexible printed circuit (FPC) (hereinafter collectively referred to as "flexible wiring body"). The present invention relates to a connection withstand voltage test connection unit for performing the test.

[0002]

2. Description of the Related Art FIG. 8 is a schematic plan view of a conventional flexible wiring body F. As shown in the figure, generally, in this kind of flexible wiring body F, a plurality of conductor patterns P parallel to each other are formed by laying a substantially linear conductor 2 on a base film 1, The cover lay film 3 is laminated on the conductor pattern P to be formed. The base film 1 and the coverlay film 3 have a thickness of 25 μm (75 μm including an adhesive layer), for example.
The polyester film of m) is most widely used, and when heat resistance is not required, a polychlorinated film is used. On the other hand, as the conductor 2, a circular electric wire having a circular cross section or a flat electric wire having a rectangular cross section is adopted depending on its application. For example, in the case of a flat electric wire, a tin-plated annealed copper foil having a width of 0.5 mm and a thickness of 35 μm is used. When laying the conductors 2, the conductors 2 are laid at a constant conductor pitch PW with a margin width M set from a predetermined reference plane F1.

The flexible wiring body F is usually formed in a streamlined shape or a rectangular shape as shown in the drawings, and a part (mainly both ends) thereof has the above-mentioned base film 1.
Alternatively, one of the coverlay films 3 is removed to expose the conductor pattern P. In the process of manufacturing the flexible wiring body F, it is necessary to inspect whether or not the conductors 2 forming the conductor pattern P have good continuity and whether the withstand voltage between the conductors 2 and 2 is good (hereinafter referred to as "conduction withstand voltage inspection"). There is. Therefore, in the past, the conduction withstand voltage inspection device
The flexible wiring body F was subjected to a conduction withstand voltage test.

FIG. 9 is a perspective view showing a schematic structure of a general conduction withstand voltage inspection device. As shown in the figure, the conventional continuity inspection apparatus 100 electrically inspects a flexible wiring body F, which is an inspected product, for electrical continuity.
And a connection unit 120 for electrically connecting the flexible wiring body F to the inspection unit 110. The connection unit 120 includes a clip-shaped main body 12
1 and a probe 122 provided on the main body 121. The probe 122 is a pin-shaped conductive member that comes into point contact with the exposed conductor of the flexible wiring body F. When conducting the withstand voltage test, by sandwiching the exposed portion of the conductor 2 of the flexible wiring body by the main body 121, the probe 122 is brought into point contact with the exposed portion with a force of, for example, 1 kgf, and the inspection unit 110 causes a voltage of, for example, 3V. Voltage is applied for 1 second to conduct continuity test and 1000V
The voltage was applied for 3 seconds to perform a withstand voltage test.

FIG. 10 is a schematic view showing the outline of the inspection state by the conventional conduction withstand voltage inspection unit. As shown in the figure, the probes 122 are equally spaced in accordance with the conductor pitch PW of the flexible wiring body F. In order to position these probes 122 on the exposed portion 2A of the conductor 2 (the hatched portion in the drawing), the reference plane F1 serving as the reference for the margin width M of the wiring pattern P of the flexible wiring body F is set on the main body 121 (see FIG. 9). ) Positioning member 121
It was positioned by A and the probe 122 was in point contact with the conductor 2.

[0006]

However, in the case of conducting the withstand voltage test under the above-mentioned conditions, the relationship between the material and thickness of the films 1 and 3 of the flexible wiring body F,
There is a problem that the exposed portion of the conductor 2 is plastically deformed while being warped. In addition, since the pin-shaped probe 122 is pressed in a state of being in point contact with the conductor 2, there is a problem that the probe 122 is easily scratched on the surface of the conductor 2. For this reason, there is a possibility that the appearance of the flexible wiring body F is impaired and electrical failure (contact resistance increases) may occur, resulting in a defective product. In order to solve such a problem, the contact pressure of the contact may be set low, but in that case, leak discharge is likely to occur during the withstand voltage test, which is not preferable.

Further, when the pin-shaped probe 122 is in point contact when positioning with reference to the margin width M, when the pitch PW between the conductors 2 and 2 is distorted (for example, There is also a problem that the deviation of the pitch PW cannot be detected unless the conductor 2) shown in FIG. 10 is short-circuited. The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a connection withstand voltage inspection connection unit capable of efficiently performing a withstand voltage inspection of a flexible wiring body F without adversely affecting the flexible wiring body F. It is an issue.

[0008]

In order to solve the above-mentioned problems, the present invention provides an insulating resin film and a part of the resin film laminated to form a predetermined conductor pattern by being laminated on the resin film. In a connection unit for conducting withstand voltage test for conducting a withstand voltage test of a flexible wiring body having a plurality of mutually parallel conductors that are provided, it is provided corresponding to each conductor of the flexible wiring body, and at least a line contact is made to the exposed portion of the conductor. have a contact that is constituted by a flat cable with the possible conductive connection portion, the conductor connecting portion of the contact
Base that holds the minute in place and a guide that is fixed to the base.
The exposed conductor part of the flexible wiring body is joined to the body connection part
To position the flexible wiring body so that
The flexible member and the positioned flexible wiring
A pressing plate that can be pressed against the conductor connection part on the base, and a pressing plate.
Manually is conductive breakdown voltage test connection unit, characterized in that a handle mechanism for manipulating.

According to the present invention, in the continuity withstand voltage test, the conductor connecting portion of the flat cable as the contactor comes into contact with the exposed portion of the conductor of the flexible wiring body as the inspection object in at least a line contact state. Here, "at least line contact is possible" means that they are in contact with each other with a certain length, and preferably the concept includes a contact state between flat electric wires. The conductor of the flat cable as the contactor is preferably a rectangular electric wire having a rectangular cross section. Furthermore, it is preferable to use the same kind of conductor as the conductor of the flexible wiring body as the inspected product. Also, this
In the invention, the flexible wiring body is used as a contactor.
Precisely positioned with respect to the conductor connection part of the cable
It becomes possible to arrange. In that state, handle machine
Conductor connection of the contactor in advance by manually operating the structure
Conductor connection part of flexible wiring body positioned in the part
Press the minute, sandwich between the base and the pressure plate, and pressurize
It will be possible.

According to a second aspect of the present invention, in the connection unit for conducting withstand voltage inspection according to the first aspect, the conductor connecting portion of the flat cable has a conductor width wider than that of the conductor of the flexible wiring body to be inspected. It is what In the invention including this specific matter, when the conductor pitch of the flexible wiring body as a product is different from the regular specifications, the conductors whose conductor pitch is deviated are the contactors corresponding to the conductors on the side close to the conductor. This will come into contact with the conductor connecting portion and cause a short circuit.

According to a third aspect of the present invention, in the connection unit for conducting withstand voltage test according to the first or second aspect, the effective contact length of the conductor connecting portion of the flat cable is
The length is set to be longer than the length required to contact the conductor of the flexible wiring body, and the tip end portion is arranged so as to contact the exposed portion of the conductor of the flexible wiring body.

In this structure, the tip of the conductor connecting portion of the flat cable as the contactor is brought into contact with the conductor of the flexible wiring body as the product, and the conduction withstand voltage test is performed.
If it becomes unusable due to external damage, wear, etc. on the contact part with the flexible wiring body due to continued use,
By cutting this, it becomes possible to newly use the remaining conductor connecting portion.

[0013]

[0014]

[0015]

DETAILED DESCRIPTION OF THE INVENTION Referring to the accompanying drawings,
A preferred embodiment of the present invention will be described. In addition,
In the following description, the same members as those of the above-described conventional technique are designated by the same reference numerals, and the description thereof will be omitted. FIG. 1 is a perspective view showing a schematic configuration of a conduction withstand voltage inspection device 10 employing a conduction withstand voltage inspection connection unit according to an embodiment of the present invention.

Referring to FIG. 1, the conduction withstand voltage inspection apparatus 10 shown in the figure is a well-known inspection unit 110 to which a connection withstand voltage inspection connection unit 20, which is the essence of the present invention, is connected. The connection unit 20 includes a base 21 and a base 2.
Positioning mechanism 22 fixed on top of No. 1 and flat cable 23 as a contactor fixed on positioning mechanism 22
And a pressing mechanism 24 for pressing the flexible wiring body F, which is the inspection object, against the flat cable 23.

FIG. 2 is a schematic front view showing a partially cutaway portion of a flexible wiring body as an inspected product which is inspected by the connection unit for conducting withstand voltage inspection of FIG. As shown in FIG. 2, the flexible wiring body F in the illustrated specific example is a so-called intermediate molded product in which a plurality of conductor patterns P of a flat cable as a final product are continuously arranged in parallel,
Finally, it is cut along a substantially streamlined outline indicated by the imaginary line F2. This flexible wiring body F
Is formed in a substantially rectangular shape extending long in the direction in which the conductor patterns P are arranged.

FIG. 3 is a partially cutaway perspective view of the positioning mechanism used in the connection withstand voltage inspection connection unit of FIG. As shown in FIG. 3, the positioning mechanism 22 includes
The base 22 (see FIG. 1) has a mounting base 22A that is replaceably mounted. The mounting base 22A is formed in a substantially rectangular shape in a plan view, and a pair of clamps 22B is provided on the upper surfaces of both ends in the longitudinal direction of the mounting base 22A. Each clamp 22B is for fixing the flat cable 23 as a contactor, and is attached to the mount 22A.
Plate 22 fixed to the mounting base 22A along the long side of the
C and the fixed plate 22C between the flat cable 23
And a sandwiching plate 22D for sandwiching. Fixed plate 22C
A screw hole 22H is screwed into the screw hole 22.
The flat cable 23 is sandwiched between both plates 22C and 22D by inserting a bolt 22E screwed into H into the sandwiching plate 22D, as will be described later in detail in FIG. Positioning members 23E, 2 corresponding to the flexible wiring body F are provided between the clamps 22B, 22B.
3F is provided and fixed to the mounting base 22A. The positioning members 23E and 23F allow the conductor exposed portion 2A of the flexible wiring body F to be attached to the conductor connecting portion 23C of the flat cable 23 which will be described in detail later.
The flexible wiring body F can be positioned so that they are joined together. Each sandwiching plate 22D is provided with a pair of positioning projections 22G so that the flat cable 23 corresponding to the flexible wiring body F to be inspected can be precisely positioned.

As shown in FIGS. 1 and 3, the flat cable 23 is a belt-shaped one in which a substantially linear conductor 23B is laminated between a pair of resin films 23A, and the conductor 23B is exposed at one end thereof. Conductor connection part 23
C is formed, and a connecting connector 23D is attached to the other end, and by connecting this connecting connector 23D to the connector 111 of the inspection unit 110, each pole specified by the conductor 23B. Moreover, the conductor 2 of the flexible wiring body F can be connected to the inspection unit 110. The conductor 23B is a flat electric wire formed of a tin-plated annealed copper foil of the same kind as the flexible wiring body F, whereby the surface contact with the conductor 2 of the flexible wiring body F is ensured. Further, since the same kind of material is used, even if the material of the inspected product is soft, scratches and plastic deformation are less likely to occur.

FIG. 4 shows the relationship between the flexible wiring body to be inspected by the connection unit for conducting withstand voltage inspection of FIG. 1 and the flat cable as a contact. FIG. 4A shows the flat cable and the regular flexible wiring body. FIG. 2B is an enlarged schematic plan view showing an essential part, and FIG. 2B is an enlarged schematic plan view showing an essential part of a flexible cable having a flat cable and defective conductor pitch.

As shown in FIG. 4 (A), each conductor 23B of the flat cable 23 is formed corresponding to each conductor 2 of the flexible wiring body F as the inspected product. Conductor patterns are formed with a pitch interval PH having the same size as the pitch PW. Further, each conductor 23B of the flat cable 23 is formed of a rectangular electric wire, so that each conductor 2 of the flexible wiring body F can be brought into surface contact. However, in the illustrated specific example, the conductor width D of each conductor 23B of the flat cable 23 is set to be wider than the conductor width DW of each conductor 2 of the flexible wiring body F as the inspected product. As a result, as shown in FIG. 4B, when the conductor pitch PW of the flexible wiring body F as a product is different from the regular specifications (for example, as shown in FIG. (Where the conductor 2 is close to the conductor 2 of the pole), even if the margin width M of the conductor pattern P is
Is a regular size, the conductor 2 (the conductor of the pole in the illustrated example) whose conductor pitch PW is displaced corresponds to the conductor on the side close to it (the conductor of the pole in the illustrated example). The flat cable 23 as a contactor comes into contact with the conductor connecting portion (of its pole) 23C, and a short circuit occurs at the conductor connecting portion of the pole. Of course, when the margin width M is different from the regular size, each conductor pitch P
Even if W is normal, since a short circuit occurs, this can be detected.

FIG. 5 is a schematic cross-sectional view of a flexible wiring body to be inspected by the connection unit for conducting withstand voltage inspection of FIG. 1 and a flat cable as a contact. As shown in the figure,
The conductor connecting portion 23C of the flat cable 23 has its tip end sandwiched downward by the clamp 22B and is rewound on the sandwiching plate 22D of the clamp 22B, so that it is exposed upward on the sandwiching plate 22D. In this attached state, the effective contact length LE of the total length L of the conductor connecting portion 23C, less the sandwiching margin L1 required for sandwiching, is greater than the length LW required to contact the conductor 2 of the flexible wiring body F. It is set long. At the same time, the tip end side portion of the conductor connecting portion 23C is arranged so as to come into contact with the exposed portion 2A of the conductor 2 of the flexible wiring body F. In the illustrated example, since the conductor connecting portion 23C of the flat cable 23 is sandwiched, the effective contact length LE is shortened by the sandwiching margin L1. A configuration in which the cable 23 is fixed may be adopted. In that case, although the fixing strength of the flat cable 23 becomes weak, the sandwiching margin L1 becomes 0, so that the effective contact length LE can be set long.

FIG. 6 is a perspective view showing a part of the pressing mechanism 24 adopted in the connection unit for conducting withstand voltage inspection of FIG. As shown in FIG. 1 and FIG. 1, the press mechanism 24 includes a pair of pillars 24 provided upright on the base 21.
Contains A. The upper end of each pillar 24A is bent at a right angle to face directly above the positioning mechanism 22, and
The base ends of a pair of handles 24C, the free ends of which are connected by grips 24B, are connected to both sides by shafts 24D. On the other hand, the mounting member 2 is attached to the upper end of each pillar 24A.
4E is sandwiched and fixed, and this mounting member 2
An elevating rod 24F is attached to 4E so as to be vertically movable. The elevating rod 24F and the handle 24C are connected via a link member 24G. The link member 24G and the handle 24C are connected via a cam surface (not shown), and the handle 24C is indicated by an arrow A in FIG.
When it is rotated as shown by 1, the link member 24G descends downward until a certain stroke to push down the elevating rod 24F, and in a subsequent stroke, it rotates around arrow A2 to push down the elevating rod 24F. . On the other hand,
A pressing plate 24J is detachably fixed to a lower end portion of the elevating rod 24F via a mounting member 24H, and the flexible wiring body F positioned by the positioning mechanism 22 is mounted on the base 21 by the pressing plate 24J. The conductor connecting portion 23C can be pressed. A large-diameter head 24K is formed at the upper end of the lifting rod 24F described above, and a compression coil spring 24L is interposed between the head 24K and the mounting member 24E. . Therefore, in the free state, the compression coil spring 24L maintains the pressing mechanism 24 in the posture shown in FIG.

With the above construction, as shown in FIG. 1, the positioning mechanism 22 is provided with a flexible wiring body F as an inspected product.
The flexible wiring body F can be pressed against the conductor connecting portion 23C (see FIG. 2) of the flat cable 23 serving as a contactor by positioning and operating the press mechanism 24 to perform the intended conduction withstand voltage test. become. At this time, in the above-described embodiment, the conductor connecting portion 23C of the flat cable 23 as the contactor is at least in line contact with the exposed portion 2A of the conductor 2 of the flexible wiring body F as the inspection object (the specific example shown in the drawing). Since they contact each other with flat electric wires, contact each other for conducting withstand voltage inspection.
Even if a high pressure is applied between the contactor 23 and the flexible wiring body F, there is no possibility that the flexible wiring body F as a product will be plastically deformed or damaged.

Therefore, there is a remarkable effect that the conductive breakdown voltage test of the flexible wiring body F can be efficiently performed without adversely affecting the flexible wiring body F.
Further, as shown in FIG. 4 (B), when the conductor pitch PW of the flexible wiring body F as a product is different from the regular specifications, there is an advantage that it can be electrically detected. .

In addition, since it becomes possible to cut the unusable portion and newly use the remaining conductor connecting portion 23C, there is an advantage that the maintenance of the contact 23 becomes easy. In particular, when the positioning mechanism 22 and the press mechanism 24 described above are adopted, the flexible wiring body F as the inspection object can be precisely positioned on the contact 23, so that the flexible wiring body F becomes the final product conductor pattern. Even if it is an intermediate molded product having P continuously, there is an advantage that the conductor patterns P of the flexible wiring body F can be collectively inspected. In addition, a flexible wiring body F is provided by the handle mechanism 24.
Since it is possible to apply pressure to the conductor connecting portion 23C, there is an advantage that sufficient pressure can be applied even when the flexible wiring body F has a large area.

The above-described embodiments are merely preferable specific examples of the present invention, and the present invention is not limited to the above-described embodiments. FIG. 7 is a perspective view showing another embodiment of the present invention. The connection withstand voltage test connection unit 30 shown in FIG.
A rectangular plate-shaped base 31, a pair of hinges 32 (only one is shown) provided on both sides of the base 31, and a hinge 3
A movable plate 33 connected to the base 31 via the two and a torsion coil spring 34 (shown only by a broken line) for urging one end of the movable plate 33 to the one end 31 of the base 31 are provided. It is a clip type in which the above-mentioned clamp 22 is provided on a portion and a pressing plate 35 is pivotally supported on one end of a movable plate 33. This conductor withstand voltage inspection connection unit 30 is shown in FIG.
It is preferably used when inspecting the streamlined flexible wiring body (flat cable) F as described in 1., and the conventional connection unit is the contactor fixed to the clamp 22 shown in FIG. The flat cable 23 is similar to that of the embodiment, and the flexible wiring body F is fixed to the flat cable 23 by the pressing plate 35.
The difference is that they are pressed against. Even in the case of adopting this form, it is possible to efficiently perform the conductive breakdown voltage test of the flexible wiring body F without adversely affecting the flexible wiring body F.

Needless to say, various design changes can be made within the scope of the claims of the present invention.

[0029]

As described above, according to the present invention, since the conductor connecting portion of the flat cable as the contactor comes into contact with the exposed portion of the conductor of the flexible wiring body as the inspection object in a contact state, conduction is achieved. Even if a high pressure is applied between the contactor and the flexible wiring for the pressure resistance test,
There is no fear that the flexible wiring body as a product will be plastically deformed or damaged. Therefore, there is a remarkable effect that the conduction withstand voltage test of the flexible wiring body can be performed without adversely affecting the flexible wiring body. In addition, contact the flexible wiring body as the inspected product.
Can be precisely positioned on the flat cable as a child
The flexible wiring body is the conductor pattern that is the final product.
Even if it is an intermediate molded product that has
Collectively inspect each conductor pattern of the flexible wiring body
It has the advantage of being able to In addition, the hand
The flexible mechanism adds the conductor connection part of the flexible wiring body.
Since it is possible to press the surface of the flexible wiring body
Apply sufficient pressure even when the product is wide
The advantage is that

Further, the invention according to claim 2 has an advantage that it is possible to electrically detect when the conductor pitch of the flexible wiring body as a product is different from the regular specifications. Further, in the invention according to claim 3, since it becomes possible to cut the unusable portion and newly use the remaining conductor connecting portion, it is easy to maintain the flat cable as the contactor. There is.

[0031]

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a conduction withstand voltage inspection device adopting a conduction withstand voltage inspection connection unit according to an embodiment of the present invention.

FIG. 2 is a schematic front view showing a partially cutaway portion of a flexible wiring body as a product to be inspected, which is inspected by the connection withstand voltage inspection connection unit of FIG.

3 is a perspective view showing a partially broken cutaway view of a positioning mechanism used in the connection unit for conducting withstand voltage inspection of FIG. 1. FIG.

FIG. 4 shows a relationship between a flexible wiring body to be inspected by the connection unit for conducting withstand voltage inspection of FIG. 1 and a flat cable as a contactor. (A) is a main portion of the flat cable and the regular flexible wiring body. FIG. 3B is an enlarged schematic plan view showing a main portion of a flat cable and a flexible wiring body having a defective conductor pitch.

5 is a schematic cross-sectional view of a flexible wiring body and a flat cable as a contactor to be inspected by the connection withstand voltage inspection connection unit of FIG.

FIG. 6 is a perspective view showing a cutaway part of a press mechanism employed in the connection withstand voltage inspection connection unit of FIG. 1.

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a schematic plan view of a conventional flexible wiring body.

FIG. 9 is a perspective view showing a schematic configuration of a general conduction withstand voltage inspection device.

FIG. 10 is a schematic diagram showing an outline of an inspection state by a conventional conduction withstand voltage inspection unit.

[Explanation of symbols]

10 Continuity voltage tester 20 Connection unit for continuity voltage test 22 Positioning mechanism 23 Flat cable (contactor) 24 Press mechanism 30 Connection unit for continuity voltage test

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Ito 1-1-14 Nishisuehiro-cho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (56) References JP 61-102565 (JP, A) JP Sho 62-59871 (JP, A) Actual Kaihei 3-28474 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01R 31/02 H01R 9/00-9/09

Claims (3)

(57) [Claims] 1. A conductive withstand voltage of a flexible wiring body having an insulating resin film and a plurality of parallel conductors which are laminated on the resin film with a part exposed to form a predetermined conductor pattern. In the connection unit for conducting withstand voltage test, which is to be inspected, provided corresponding to each conductor of the flexible wiring body,
A contact formed of a flat cable having a conductor connecting portion capable of making at least line contact with the exposed portion of the conductor;
Then , the flexible wiring body is attached to the base that fixes the conductor connection part of the contact in place and the conductor connection part that is fixed to the base.
Flexible wiring body so that the exposed conductors of
The positioning member for positioning the flexible wiring body that is positioned on the base.
Continuity breakdown voltage test connection unit <br/> be characterized with the body connecting portion allows pressing a pressing plate and a handle mechanism for manipulating the pressing plate manually. 2. The connection unit for conducting withstand voltage inspection according to claim 1, wherein the conductor connecting portion of the flat cable has a conductor width wider than that of the conductor of the flexible wiring body to be inspected.
A connection unit for conducting withstand voltage test, which is characterized in that 3. The connection unit for conducting withstand voltage test according to claim 1 or 2, wherein an effective contact length of a conductor connecting portion of the flat cable is longer than a length required for contacting the conductor of the flexible wiring body. The connection for conducting withstand voltage test, which is set and is arranged so that its tip portion contacts the exposed portion of the conductor of the flexible wiring body.
Unit .