JPH0817611A - Chip-shaped variable resistor and its manufacture - Google Patents

Abstract

PURPOSE:To facilitate the operation of suction device, by constituting the cylin drical shaft part of an intermediate terminal as a form wherein the tip part is practically closed, and forming a stretching part which stretches outside the radial direction of the cylindrical shaft part. CONSTITUTION:The peripheral wall of a closed tip part 6a1 of a cylindrical shaft part 6a is stretched outside the radial direction of the cylindrical shaft part 6a, while the peripheral wall is compressed in the axial line direction, and subjected to press deformation to form a stetching part 6c along the contact part 5d of a slider 5. A ring type stretching part 6c which stretches outside the radial direction and is concentric with the cylindrical shaft part 6a, and a closed part 6d which overlaps on the stretching part 6c and closes the tip part of the cylindrical shaft part 6a are formed on the tip part 6a1 of the cylindrical shaft part 6a. Thereby it is made unnecessary to close the end portion of the cylindrical shaft part by using a large lid part member and an individual part member, and the whole part of a frame part 5c of the slider 5 can be easily sucked by a suction device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip variable resistor and its manufacturing method.

[0002]

2. Description of the Related Art A typical chip-shaped variable resistor is an insulating substrate having a substantially circular arc-shaped variable resistor pattern on its surface and a pair of electrode patterns connected to both ends of the variable resistor pattern. , A pair of solderable terminals connected to the pair of electrode patterns, a metal slider having sliding contacts sliding on the variable resistor pattern, and an intermediate terminal electrically connected to the slider. It has and. The slider is formed at a central portion of the collar portion having a contact support arm having a sliding contact that slides on the variable resistor pattern, and a suction surface to which the contact support arm is connected and suctioned by a suction device. And a bottomed driver slot structure having a bowl-shaped portion having a contact portion that comes into contact with the surface portion of the insulating substrate surrounded by the variable resistor pattern, a through hole formed in the center of the bowl-shaped portion, and a collar portion It is provided with a recess. Further, the intermediate terminal integrally includes a through hole formed in the insulating substrate, a cylindrical shaft portion inserted into the through hole of the slider, and a terminal portion connected to an end portion of the cylindrical shaft portion located on the back surface side of the insulating substrate. The distal end portion of the tubular shaft portion protruding from the through hole of the slider is deformed so that the slider rotates about the tubular shaft portion. The cylindrical shaft portion of the conventional intermediate terminal has both ends in the axial direction opened, and the tip end protruding from the through hole of the slider is curled or caulked outward so that the slider is centered on the cylindrical shaft portion. It is designed to rotate.

[0003]

Most of the mounting of chip-shaped electronic components on a circuit board is automated, and in the case of a chip-shaped variable resistor, a slider flange is provided by a suction device using a vacuum. It is carried out by sucking parts. However, since the cylindrical shaft member of the conventional intermediate terminal is open at both ends in the axial direction, in the case of adsorbing the chip-shaped variable resistor using the adsorbing nozzle of the shape that adsorbs the entire flange portion of the slider, Since the air is sucked through the tubular shaft member, the suction force has to be increased. It is possible to use a suction nozzle that sucks only the flange portion while avoiding the bowl-shaped portion of the slider, but there is a problem of lacking versatility. Therefore, a chip-shaped variable resistor has been proposed in which a lid member provided integrally with the bowl-shaped portion of the slider is folded to close the lid member, but a large amount of metal material is required for the slider, Since the man-hours increase, it is difficult to reduce the unit price. Further, it is possible to cover the bowl-shaped portion of the slider with another component, but in this case, there is a problem that the number of components increases and it becomes difficult to further reduce the unit price.

An object of the present invention is to provide at low cost a chip-shaped variable resistor which can be easily sucked by a suction device.

Another object of the present invention is to provide a method of manufacturing a chip-shaped variable resistor which can manufacture a chip-shaped variable resistor which can be easily sucked by a suction device with a small number of assembly steps.

[0006]

A chip-shaped variable resistor to be improved by the present invention comprises an insulating substrate having a variable resistor pattern on its surface so as to surround one end of a through hole penetrating in the thickness direction, and a variable resistor. It has a pair of terminals connected to both ends of the resistor pattern, a conductive slider having sliding contacts that slide on the variable resistor pattern, and an intermediate terminal. The slider has a contact portion that is in contact with the surface portion of the insulating substrate surrounded by the variable resistor pattern and has a through hole corresponding to the through hole. Specifically, the slider is integrally formed of a conductive metal, and a contact support arm having a sliding contact that slides on the variable resistor pattern is connected to the contact support arm and is adsorbed by an adsorption device. A collar portion having a suction surface, a bowl-shaped portion having a contact portion formed in the central portion of the collar portion and in contact with the surface portion of the insulating substrate surrounded by the variable resistor pattern, and formed in the center of the bowl-shaped portion. And a bottomed driver slot forming recess formed in the through hole and the flange portion. Further, the intermediate terminal integrally has a cylindrical shaft portion inserted into the through hole of the insulating substrate and the through hole of the slider and a connecting terminal portion connected to an end portion of the cylindrical shaft portion located on the back surface side of the insulating substrate. The distal end portion of the tubular shaft portion protruding from the through hole of the slider is deformed so that the slider rotates about the tubular shaft portion. The connecting terminal portion may have a terminal portion on the back surface side of the insulating substrate, or may have a terminal portion that rises to the side surface side of the insulating substrate beyond the back surface of the insulating substrate, and is soldered. The position and shape of the terminal portion are arbitrary.

According to the present invention, the cylindrical shaft portion of the intermediate terminal has a shape in which the tip portion is substantially closed. Then, the distal end portion is deformed so as to form an extended portion that extends radially outward of the tubular shaft portion along the contact portion of the slider.

Here, the fact that the tip portion is substantially closed means that it is closed to such an extent that the suction by the suction device is not hindered. Ideally, it is preferable that the tip end portion of the tubular shaft portion be completely closed. However, for example, in order to facilitate workability, as a result of forming a kerf or the like in the tip portion of the closed tubular shaft portion, the tip portion of the tubular shaft portion becomes completely closed after deformation. Even if not, it is acceptable as long as the presence of the kerfs or the like does not hinder the suction by the suction device. Further, in order to avoid the present invention, even if a meaningless small hole is formed in the tip portion, even if the hole remains after the deformation as an extent that does not hinder the suction by the suction device, the present invention Included.

It is preferable that the extending portion has an annular shape that is concentric with the tubular shaft portion. When such a stretched portion is formed, the frictional resistance between the contact portion of the slider and the stretched portion does not vary greatly, so that the slider slides smoothly. In the case of forming such an extended portion, if the peripheral wall portion of the tip end portion of the tubular shaft portion is extended outward in the radial direction of the tubular shaft portion and press-deformed so as to form an extended portion that follows the contact portion. Good. Press deformation or pressing means pressing a press tool or a press die having a predetermined shape on the end face against the tip portion of the cylindrical shaft portion of the intermediate terminal, and compressing and deforming the tip portion by pressing force. It means making a desired shape. In order to extend the peripheral wall portion of the tip end portion of the tubular shaft portion to the outside in the radial direction of the tubular shaft portion, for example, the shape of the end surface of the press tool or the die for pressing, having a convex portion at the center and The shape may be such that a flat portion is provided around the convex portion. To prevent excessive force from being applied to the insulating substrate by pressing, insert a receiving tool or mold into the cylindrical shaft of the intermediate terminal from the back side of the insulating substrate and It suffices to perform the press work by sandwiching the tip end portion of the tubular shaft portion between the tool or die and the press tool or die for pressing.

The shape of the extending portion will be determined by the tool or die used, but is not limited to the annular shape that is concentric with the cylindrical shaft portion.

[0011]

Since the tip end portion of the tubular shaft portion of the intermediate terminal has a substantially closed shape, the end portion of the tubular shaft portion on the tip end side even after the deformation process for forming the extension portion. The part remains substantially closed. Therefore, it is not necessary to cover the end of the cylindrical shaft portion with a large lid member or another member, and the unit price can be reduced. Further, since the processing of the distal end portion of the tubular shaft portion of the intermediate terminal is a processing that is also conventionally required, according to the present invention, the distal end portion of the tubular shaft portion of the intermediate terminal is closed without increasing the number of assembly steps. can do.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1A to 1C are a plan view, a sectional view and a bottom view of an embodiment of a chip variable resistor of the present invention, and FIGS. 2A and 2B are a side view and a front view. 3 is a plan view of the insulating substrate. FIG. In these figures, 1 is an insulating substrate formed by processing a ceramic substrate or the like. As shown in FIG. 3, on the surface 1a of the insulating substrate 1, a substantially arcuate variable resistor pattern 2 and a pair of electrode patterns 3a and 3b connected to both ends of the variable resistor pattern 2 are formed. Has been done. The shape of the substantially arc-shaped resistor pattern 2 does not need to be a perfect arc, and includes all shapes used for the resistor pattern of the rotary variable resistance of a known shape including a horseshoe shape. The electrode patterns 3a and 3b are formed of a conductive material having a low resistance value (for example, silver, copper, etc.), and in this embodiment, the pair of protrusions 1b and 1c provided on the insulating substrate 1 are formed.
Is formed to extend to above. The shapes and dimensions of the electrode patterns 3a and 3b are the same as those of the metal terminals 4a and 4b.
It suffices to determine the shape and dimensions that can be electrically connected to b.
It is not necessary to extend to the ends of the protrusions 1b and 1c.

Metal terminals 4a and 4b having a substantially U-shaped cross section are fitted in the protrusions 1b and 1c. In these metal terminals 4a and 4b, the sandwiching piece located on the front surface 1a side of the insulating substrate 1 is longer than the sandwiching piece located on the back surface side 1d of the insulating substrate. Metal terminal 4 only by contact
When electrically connecting a and 4b to the electrode patterns 3a and 3b, the width dimension in the thickness direction of the fitting recess (4b1) of the metal terminals 4a and 4b is determined by the metal terminals 4a and 4b.
It is necessary to determine so that b does not easily come off the protrusions 1b and 1c. When the metal terminals 4a and 4b are connected to the electrode patterns 3a and 3b using an adhesive or solder cream, the metal terminals 4a and 4b and the protrusions 1b and 1 are formed.
The width dimension in the thickness direction of the fitting recesses (4b1) of the metal terminals 4a and 4b is determined so that a predetermined adhesive layer or solder layer can be formed between the metal terminals 4c and c. In this embodiment, the metal terminals 4a and 4b and the electrode patterns 3a and 3 are formed only by contact.
It is electrically connected to b. The metal terminals 4a and 4b are provided in order to facilitate soldering to the mounting board.
The iron plate is copper-plated and then solder-plated. It should be noted that these platings may be applied to at least the surface to which the solder is attached.

At the center of the insulating substrate 1, a contact support arm 5b having a sliding contact 5a that slides on the variable resistor pattern 2 and a contact support arm 5b are connected and adsorbed by an adsorption device (not shown). 5c having a suction surface
A bowl-shaped portion 5e having a contact portion 5d formed in the central portion of the collar portion 5c and in contact with the surface portion of the insulating substrate 1 surrounded by the variable resistor pattern 2, and formed in the center of the bowl-shaped portion 5e. A metal slider 5 having electroconductivity, which has four bottomed driver slot forming recesses 5g1 to 5g4 formed in the through hole 5f and the collar portion 5c, is mounted. The slider 5 is integrally formed of a metal plate, such as stainless steel, to which solder is unlikely to adhere.

When the slider 5 is formed, a shape having a semicircular portion at both ends of a rectangular portion (so-called oval shape)
Prepare the metal plate of. Then, three kerfs are formed along one of the longitudinal semicircular arc edges of the metal plate. Three
The shape of the innermost kerf among the kerfs of the book is shown in FIG.
It has the same contour shape as the edge of the expanded portion 5c1 of the collar portion 5c shown in (A), and two kerfs on the outer side thereof are provided with two contact portions by dividing the contact support arm 5b into two. The sliding contact 5a is formed. In the conventional chip-shaped variable resistor, the contact supporting arm is formed by forming a plurality of cut grooves in the portion where the extended portion 5c1 is located. Therefore, the extended portion is provided in the flange portion as in this embodiment. Not not. Therefore, the conventional chip-shaped variable resistor has only two driver-slot-forming recesses corresponding to the driver-slot-forming recesses 5g2 and 5g4 of this embodiment.

On the other hand, in this embodiment, the expansion portion 5c1
Due to the provision of the above, it is possible to form four driver slot constituting recesses 5g1 to 5g4 at intervals of 90 degrees in the circumferential direction. 4 driver slot configuration recesses 5g1 to 5g4
Among them, the pair of driver slot forming recesses 5g1 and 5g3 arranged in the direction orthogonal to the direction in which the pair of driver slot forming recesses 5g2 and 5g4, which also include the conventional chip variable resistor, are sliding contacts. It is lined up with 5a. In this way, the sliding contact 5a is located on the extension line of the driver slot formed by the pair of recesses 5g1 and 5g3 for forming the driver slot.
One driver slot configuration recess 5g3 is sliding contact 5a
It becomes a mark of the position of, and the resistance value can be easily adjusted. In particular, with such a configuration, the sliding contact 5a is located below the collar 5c of the slider 5 by forming the bent portions or bent portions 5b11 and 5b21 formed on the pair of arm portions 5b1 and 5b2 of the contact support arm 5b. Even if it is formed as described above, there is no problem in adjusting the resistance value.

As shown in FIG. 2, in this embodiment, bent portions 5b11 and 5b21 are formed by bending a pair of arm portions 5b1 and 5b2 of the contact support arm 5b in a direction away from the sliding contact 5a. . From another point of view, the pair of arm portions 5b1 and 5b2 of the contact support arm 5b are bent so as to project in a direction away from the sliding contact 5a to form bent portions. These bent portions 5b11
The bending shape and the bending angle of 5b21 can shorten the distance between the center of the slider 5 and the sliding contact 5a,
Moreover, it is optional as long as it can generate a spring force capable of pressing the sliding contact 5a against the variable resistor pattern 2 on the insulating substrate 1 with a desired force. Particularly, in this embodiment, the pair of arm portions 5b1 and 5b of the contact support arm 5b are
When the bent portions 5b11 and 5b21 formed in 2 are formed such that the contact support arm 5b and the sliding contact 5a are located below the collar portion 5c (extended portion 5c1) of the slider 5, the radial dimension of the slider 5 ( The collar portion 5c of the slider 5 can be enlarged without significantly increasing the dimension of the slider in the direction orthogonal to the central axis. Further, as in the present embodiment, the pair of arm portions 5b1 and 5b2 of the contact support arm 5b are provided.
When the contact supporting arm 5b and the sliding contact 5a are positioned below the flange 5c of the slider 5, the bent portions 5b11 and 5b21 formed on the contact supporting arm 5b and the sliding contact 5a are formed.
Is protected by the collar portion 5c, the operator hardly erroneously hooks the contact point supporting arm 5b at the tip of the driver, and there is no possibility of deforming the contact point supporting arm 5b. After all, according to the present embodiment, it is possible to reduce the radial extension of the contact support arm 5b as compared with the related art, and it is possible to obtain a desired spring force by the bent portion. Further, since the extension dimension of the contact support arm 5b to the outside in the radial direction can be made small, the flange portion 5c of the slider 5 can be provided with the expansion portion 5c1 to widen the flange portion 5c to the sliding contact 5a side, and a sufficient adsorption area can be obtained. Can be secured.

The intermediate terminal 6, which constitutes a mounting member for rotatably mounting the slider 5 on the insulating substrate 1, is inserted into the through hole 1e provided in the insulating substrate 1 and the through hole 5f provided in the contact portion 5d of the slider 5. It integrally has a tubular shaft portion 6a and a connecting terminal portion 6b connected to an end portion of the tubular shaft portion located on the back surface 1d side of the insulating substrate 1. The tip end portion 6a1 of the tubular shaft portion 6a protruding from the through hole 5f of the slider 5 is arranged so that the slider 5 rotates about the tubular shaft portion 6a.
Has been press deformed. Specifically, as shown in FIG. 4, the cylindrical shaft portion 6a of the intermediate terminal 6 before the press deformation has a shape in which the tip portion 6a1 is closed. The intermediate terminal 6 having such a shape can be easily obtained by molding a single metal plate by pressing. In the conventional chip-shaped variable resistor, the tip portion of the cylindrical shaft portion of the intermediate terminal is opened, and the opening end portion is curled or caulked outward in the radial direction. On the other hand, in this embodiment, the peripheral wall portion of the closed distal end portion 6a1 of the tubular shaft portion 6a is extended outward in the radial direction of the tubular shaft portion 6a while being compressed in the axial direction to reach the contact portion 5d of the slider 5. It is pressed and deformed so as to form the extending portion 6c.

When carrying out press deformation or press working, as shown in FIG. 4, a press tool having a predetermined shape on its end face or a press die 7 is attached to the tip portion of the cylindrical shaft portion 6a of the intermediate terminal 6. It is pressed against 6a1 and the tip portion 6a1 is compressed and deformed by the pressing force to have a desired shape. In order to extend the peripheral wall portion of the tip end portion 6a1 of the tubular shaft portion 6a to the outside in the radial direction of the tubular shaft portion 6a, the shape of the end face of the press tool or the pressing die 7 is set to the central portion as shown in the figure. The shape may have a hemispherical convex portion 7a and an annular flat surface portion 7b around the convex portion 7a. In addition, in order to prevent an excessive force from being applied to the insulating substrate 1 by the press working, the intermediate terminal 6 is provided from the rear surface 1d side of the insulating substrate 1.
The receiving tool or the mold 8 is inserted into the cylindrical shaft portion 6a of the cylindrical shaft portion 6a, and the cylindrical shaft portion 6 is inserted between the receiving tool or the mold 8 and the press tool or the pressing mold 7. Tip part 6a
It suffices to carry out press work so that 1 is sandwiched. In this embodiment, a concave portion 8a corresponding to the convex portion 7a provided on the end surface of the pressing tool or the pressing die 7 is formed on the end surface of the receiving tool or the metallic mold 8.

The distal end portion 6a1 of the cylindrical shaft portion 6a deformed by using the molds 7 and 8 has an annular extending portion extending radially outward and concentric with the cylindrical shaft portion 6a. 6
c and a closing portion 6d that overlaps the extending portion 6c and closes the tip end portion of the tubular shaft portion 6a are formed. Annular extension 6
When c is formed, the contact portion 5e of the slider 5 and the extending portion 6c
Since there is no great variation in the frictional resistance between the slider and the slider, the slider slides smoothly. Conventionally, the cylindrical shaft portion 6a
Since one of the opening ends was crimped, there was a risk that the sharp corners of the opening end would come into contact with the surface of the contact portion of the slider to generate metal powder that causes a short circuit. In this case, since the contact portion 5e and the extending portion 6c are in surface contact with each other, metal powder is hardly generated and reliability is improved. Since the outer diameter of the extending portion 6c is larger than that of the through hole 5f of the slider 5, this prevents the slider 5 from coming off, and the slider 5 rotates around the cylindrical shaft portion 6a. Move.

As in this embodiment, the tip end portion 6a1 of the cylindrical shaft portion 6a of the intermediate terminal 6 is formed into a substantially closed shape,
When the extending portion 6c is formed, the end portion of the tubular shaft portion 6a on the front end side remains closed even after the deformation processing of the tubular shaft portion 6a. Therefore, it is not necessary to cover the end of the cylindrical shaft portion with a large lid member or another member, and the unit price can be reduced. Further, in this embodiment, it becomes possible to suck the entire collar portion 5c of the slider 5 with one suction nozzle of a suction device (not shown). This is especially true for the cylindrical shaft 6a.
This is because the front end portion 6a1 of the above is closed and the flange portion 6c is provided with the expansion portion 6c1.

The connecting terminal portion 6b is provided on the back surface 1d of the insulating substrate 1.
It is provided with a flat plate portion 6b1 which contacts with. Also, the flat plate portion 6b
The end portion 1 is provided with a solderable terminal portion 6b2 extending along the end surface 1 of the insulating substrate 1. Terminal part 6
The b2 is erected parallel to the end surface of the insulating substrate 1 with a predetermined gap. In this embodiment, in order to facilitate the soldering, the portion of the terminal portion 6b2 to which the solder is attached (soldering portion) is copper-plated and solder-plated like the metal terminals 4a and 4b. The gap between the terminal portion 6b2 and the insulating substrate prevents the solder from adhering to the surface 1a side of the insulating substrate 1. By providing this gap, the length of the insulating substrate 1 in the longitudinal direction (the metal terminal 4a
And 4b and the terminal portion 6b2 are arranged side by side).

The constituent features of some of the inventions described in the present specification will be described below.
To facilitate understanding, reference numerals attached to the drawings are also shown.

(1) An insulating substrate 1 having a variable resistor pattern 2 on the surface so as to surround one end of a through hole 1e penetrating in the thickness direction, and a pair of terminals 4a connected to both ends of the variable resistor pattern 2. , 4b and a contact support arm 5 provided with a sliding contact 5a that slides on the variable resistor pattern.
b, a flange portion 5c having a suction surface to which the contact point support arm is connected and sucked by a suction device, a surface portion of the insulating substrate formed in the central portion of the flange portion and surrounded by the variable resistor pattern, A bowl-shaped portion 5e having a contact portion to contact, a through hole 5f formed in the center of the bowl-shaped portion, and a plurality of bottomed driver-slot forming recesses formed in the collar portion outside the bowl-shaped portion are formed. A metallic slider 5 provided, a cylindrical shaft portion 6a inserted into the through hole 1e of the insulating substrate 1 and the through hole 5f of the slider 5, and a cylindrical shaft portion located on the back surface side of the insulating substrate. Has a terminal connecting portion 6b integrally connected to the end portion, and the tip of the tubular shaft portion protruding from the through hole of the slider so that the slider rotates about the tubular shaft portion. Intermediate part is deformed And a pair of arm portions 5b1 and 5b2 extending so as to partially surround the bowl-shaped portion on both sides of the sliding contact 5a. In the chip-shaped variable resistor, the flange portion 5c of the slider has a size such that four or more driver slot constituting recesses 5g1 to 5g4 are formed at predetermined intervals in the circumferential direction. , Four or more driver slot forming recesses are formed in the flange portion of the slider, and the pair of arm portions 5b1 and 5b2 of the contact support arm are bent in a direction away from the sliding contact. Parts 5b11 and 5b21 are respectively formed, and the cylindrical shaft part 6a of the intermediate terminal has a shape in which the tip end part 6a1 is substantially closed.
The tip variable portion is deformed so that an extending portion 6c extending outward in the radial direction of the tubular shaft portion 6a is formed along the contact portion 5d of the slider 5, and the chip variable resistor. .

(2) The bent portion formed on the pair of arm portions of the contact support arm is formed so that the sliding contact 5a is located below the collar portion 6c.
The chip-shaped variable resistor according to 1.

(3) The flange portion 5c of the slider is formed with four driver slot forming recesses at intervals of 90 degrees in the circumferential direction, and a pair of recesses are provided at intervals of 180 degrees. The driver slot forming recess 5g
The chip-shaped variable resistor according to (2), in which 1 and 5g3 and the sliding contact 5a are arranged in a straight line.

[0027]

According to the present invention, since the distal end portion of the cylindrical shaft portion of the intermediate terminal has a substantially closed shape,
Even after the deformation process for forming the stretched portion, the end portion on the tip side of the tubular shaft portion can be maintained in a substantially closed state, and the tubular shaft can be formed by using a large lid member or another member. Since it is not necessary to close the end of the part, there is an advantage that the unit price can be reduced. Further, since the processing of the distal end portion of the tubular shaft portion of the intermediate terminal is a processing that is also conventionally required, according to the present invention, the distal end portion of the tubular shaft portion of the intermediate terminal is closed without increasing the number of assembly steps. There is an advantage that can be done.

[Brief description of drawings]

1A to 1C are plan views of an embodiment of a chip-shaped variable resistor according to the present invention, and IB-I in FIG. 1A.
It is a B line sectional view and a bottom view.

2A and 2B are a side view and a front view of the embodiment of FIG.

FIG. 3 is a plan view of an insulating substrate used in the embodiment of FIG.

FIG. 4 is an explanatory cross-sectional view for explaining the manufacturing method of the embodiment in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulating substrate 1a Surface 1e Through hole 2 Variable resistor pattern 3a, 3b Electrode pattern 4a, 4b Metal terminal 5 Slider 5a Sliding contact 5b Contact support arm 5c Collar part 5d Contact part 5e Bowl-shaped part 5f Through hole 6 Intermediate terminal 6a Cylindrical shaft part 6a1 Tip part 6b Connection terminal part

Claims (4)

[Claims] 1. An insulating substrate having a variable resistor pattern on its surface so as to surround one end of a through hole penetrating in the thickness direction, a pair of terminals connected to both ends of the variable resistor pattern, and the variable resistor. A slider having electroconductivity including a sliding contact sliding on a pattern and a contact portion that is in contact with a surface portion of the insulating substrate surrounded by the variable resistor pattern and has a through hole corresponding to the through hole. A tubular shaft portion inserted into the through hole of the insulating substrate and the through hole of the slider, and a connecting terminal portion connected to an end portion of the tubular shaft portion located on the back surface side of the insulating substrate. An intermediate terminal which is integrally formed and in which the distal end portion of the tubular shaft portion projecting from the through hole of the slider is deformed so that the slider rotates about the tubular shaft portion. With chip-shaped variable resistor Then, the tubular shaft portion of the intermediate terminal has a shape in which the tip portion is substantially closed, and the tip portion is arranged along the contact portion of the slider so as to have a diameter of the tubular shaft portion. A chip-shaped variable resistor, wherein the chip-shaped variable resistor is deformed so that an extending portion extending outward in the direction is formed. 2. An insulating substrate having a variable resistor pattern on its surface so as to surround one end of a through hole penetrating in the thickness direction, a pair of terminals connected to both ends of the variable resistor pattern, and the variable resistor. A contact support arm having a sliding contact that slides on a pattern, a collar portion having a suction surface to which the contact support arm is coupled and suctioned by a suction device, the variable resistor formed in the central portion of the collar portion For forming a bowl-shaped portion having a contact portion that is in contact with a surface portion of the insulating substrate surrounded by a body pattern, a through hole formed in the center of the bowl-shaped portion, and a bottomed driver slot formed in the collar portion A metal slider having a recess, a cylindrical shaft portion inserted into the through hole of the insulating substrate and the through hole of the slider, and an end portion of the cylindrical shaft portion located on the back surface side of the insulating substrate. Connected An intermediate terminal which integrally has a connecting terminal portion, and in which the tip end portion of the tubular shaft portion projecting from the through hole of the slider is deformed so that the slider rotates about the tubular shaft portion. And a tubular shaft portion of the intermediate terminal having a shape in which the tip portion is substantially closed, and the tip portion is the contact portion of the slider. A chip-shaped variable resistor, characterized in that it is deformed so as to form an extended portion extending along with. 3. The chip variable resistor according to claim 1, wherein the extending portion has an annular shape that is concentric with the cylindrical shaft portion. 4. A variable resistor pattern is formed on the surface so as to surround one end of a through hole penetrating in the thickness direction, and a pair of terminals are connected to both ends of the variable resistor pattern on an insulating substrate. Conduction including a sliding contact that slides on the variable resistor pattern and a contact portion that contacts a surface portion of the insulating substrate surrounded by the variable resistor pattern and that has a through hole corresponding to the through hole Is mounted on the slider, and the cylindrical shaft portion of the intermediate terminal having a cylindrical shaft portion and a terminal portion at one end of the cylindrical shaft portion is connected to the through hole of the insulating substrate and the through hole of the slider. And the tip end portion of the tubular shaft portion projecting from the through hole of the slider is deformed so that the slider rotates about the tubular shaft portion to manufacture a chip variable resistor. A method, wherein the intermediate terminal is The distal end portion of the cylindrical shaft portion is substantially closed, and the peripheral wall portion of the distal end portion is extended outward in the radial direction of the cylindrical shaft portion so as to form an extended portion that follows the contact portion. A method of manufacturing a chip-shaped variable resistor, which comprises deforming.