JP2007134362A - Rotating electric component and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotating electric component capable manufacturing an insulation substrate using a wet material employing a sheet-like ceramic material by preventing the generation of breakages or cracks on an insulation substrate in caulking an eyelet axis. <P>SOLUTION: The electric component has: an insulation substrate 1 made of a ceramic material and having a through hole 1c on its center part; a first terminal 4 made of a metallic material and attached on the insulation substrate 1; and a second terminal 5 having a planar section 5a made of a metallic material and superimposed on the bottom surface of the insulation substrate 1, and the eyelet axis 5b erected on the planar section 5a and inserted through the through hole 1a of the insulation substrate 1. On the second terminal 5, a circular recess portion 5d recessed in the plate thickness direction of the planar section 5a is provided on the external circumferential portion of the root of the eyelet axis 5b to be inserted through the through hole 1c of the insulation substrate 1, and a circumferential edge portion 1k of the through hole 1c of the bottom surface side of the insulation substrate 1 is positioned on the recess portion 5d. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rotary electric component such as a semi-fixed variable resistor suitable for use in various electronic devices and a method for manufacturing the same.

  As a structure of a conventional rotary electrical component, a through hole for inserting the eyelet portion of the terminal plate is provided in the insulating substrate to which the terminal is attached, and when the eyelet portion of the terminal plate is formed when the eyelet portion is inserted into the through hole. In order to avoid contact with the thick portion (R portion) that can be formed at the base portion, a relief portion (tapered portion) C is formed on the outer periphery of the bottom surface of the through hole of the insulating substrate to attach the terminal to the insulating substrate. The thing of a structure is known (for example, refer patent document 1).

The structure of this conventional rotating electrical component is shown in FIG. FIG. 10 is a cross-sectional view of a main part of a conventional rotating electrical component.
In the figure, an insulating substrate 31 made of an insulating material such as a ceramic material has a substantially rectangular shape, and is provided with a concave portion 31b provided in the central portion of the surface (upper surface) 31a, and a central portion of the concave portion 31b. It has a through hole 31d provided through the bottom surface (lower surface) 31c and a pair of protrusions 31f provided extending from a pair of opposing side surfaces. An annular tapered portion C is provided on the bottom surface side of the through hole 31d.
An arc-shaped (horse-shoe) resistor made of cermet paste or the like is provided on the outer periphery of the recess 31b on the surface 31a of the insulating substrate 31, and a pair of electrodes made of silver paste or the like is connected to the end of the resistor. In the state, it is formed extending on the protrusion 31f.

The pair of terminals 34 made of a metal plate includes a bottom plate 34a, a side plate bent upward at a right angle from a side end of the bottom plate 34a, a pressing portion 34c extending from the end of the side plate, and a position orthogonal to the side plate. It has a bent piece 34d bent upward at a right angle from the end of the bottom plate 34a, and a pressing part 34e extending from the end of the bent piece 34d.
In the terminal 34, the bottom plate 34a is positioned on the bottom surface 31c of the insulating substrate 31, the side plate is positioned along the side surface, and the bent piece 34d is positioned along the end surface 31j of the insulating substrate 31 orthogonal to the side surface. . At this time, the bent piece 34d is positioned at the end face 31j.

  In this state, the holding portions 34c and 34e are bent toward the surface 31a side of the insulating substrate 31, and the insulating substrate 31 is sandwiched between the bottom plate 34a and the holding portions 34c and 34e, so that the terminals 34 are attached to the insulating substrate 31. Thereafter, the electrodes and the holding portions 34c and 34e are soldered by the solder 35 so that the terminals 34 and the electrodes are electrically connected, and the terminals 34 are attached to the insulating substrate 31.

  The terminal plate 36 made of a metal plate has a bottom plate 36 a and a eyelet portion 36 b provided so as to protrude upward from the bottom plate 36 a, and the bottom plate 36 a of the terminal plate 36 is located on the bottom surface 31 c of the insulating substrate 31. In the state, the eyelet part 36b is inserted into the through hole 31d.

A slider 37 formed by folding a metal plate having a spring property into two includes an upper plate 37b having a cross-shaped hole 37a, a lower plate 37d having a sliding portion 37c, and a swelling provided on the lower plate 37d. It has the protrusion part 37e and the hole 37f provided in the center part of the bulging part 37e.
In this slider 37, the bulging portion 37e is located in the recess 31b, the eyelet portion 36b is inserted into the hole 37f, the tip end portion of the eyelet portion 36b is crimped, and the slider 37 rotates to the insulating substrate 31. It is attached as possible.

When the rotary electric component having such a configuration inserts a screwdriver (not shown) into the cross-shaped hole 37a and rotates the slider 37, the sliding portion 37c slides on the resistor, The resistance value between the terminal board 36 and the terminal 34 is variable.
Further, such a rotating electrical component is mounted on the printed circuit board 38 with the terminals 34 and the terminal board 36 soldered to the printed circuit board 38 with solder 39 by reflow or the like. Surface mounted.

JP 2004-207513 A

  However, in the structure of the conventional rotary electric component, it is necessary to form a relief portion (tapered portion) on the outer periphery of the bottom surface of the concave portion or the through hole in the insulating substrate made of a ceramic material or the like. There is a problem that the productivity is poor and the cost is high because the number of insulating substrates cannot be increased.

  Therefore, the present invention solves the above-described problems, and the rotary electric machine is capable of manufacturing an insulating substrate by a wet material using a sheet-like ceramic material, and is less likely to be cracked or cracked when the eyelet shaft is caulked. The purpose is to provide parts.

  In order to solve the above-described problems, the present invention provides a first solution means that a resistor is formed on the surface of a ceramic material, an insulating substrate having a through hole in the center, and a metal material. The first terminal attached to the insulating substrate in a state of being electrically connected to the end portion, a plate-like portion made of a metal material and overlaid on the bottom surface of the insulating substrate, and standing on the plate-like portion. A second terminal having a eyelet shaft inserted into the through hole; and a slider that is rotatably held by the eyelet shaft when the eyelet shaft is caulked and slides on the resistor. The second terminal is provided with an annular recess recessed in the thickness direction of the plate-like portion on the outer periphery of the base portion of the eyelet shaft inserted through the through-hole of the insulating substrate, A configuration in which the peripheral edge of the through hole on the bottom surface side of the insulating substrate is positioned; It was.

Further, as a second solution, the eyelet shaft is formed by drawing the plate-like portion of the second terminal, and the base portion outer peripheral portion of the eyelet shaft is crushed and processed. It was set as the structure which formed the said cyclic | annular recessed part depressed in the plate | board thickness direction of a shape part.
As a third solution, the insulating substrate is made of a plate-shaped ceramic material, and the surface and bottom surface of the insulating substrate are formed as flat surfaces without unevenness, and the sliding is performed on the surface side of the insulating substrate. A child is rotatably mounted, and the plate-like portion of the second terminal is arranged on the bottom surface side of the insulating substrate.

  As a fourth solution, a resistor is formed on the surface made of a ceramic material, and an insulating substrate having a through-hole in the central portion and a metal plate are connected to the end of the resistor. A first terminal attached to the insulating substrate, a plate-shaped portion made of a metal plate and overlapped with a bottom surface of the insulating substrate, and an eyelet shaft standing on the plate-shaped portion and inserted into the through-hole of the insulating substrate A rotary electric component comprising: a second terminal having: and a slider that is rotatably held by the eyelet shaft by caulking the eyelet shaft and slides on the resistor, The second terminal forms the cylindrical eyelet shaft on the metal plate by drawing the flat metal plate serving as the plate-like portion, and the eyelet shaft is formed during the drawing. Crush the thick-walled part that occurs on the outer periphery of the root It was manufacturing method of forming the annular recess recessed in the thickness direction of the metal plate serving as the plate-shaped portion by a.

  As described above, the rotating electrical component of the present invention is made of a ceramic material, and a resistor is formed on the surface thereof. The insulating substrate having a through hole in the central portion and the metal material are electrically connected to the end of the resistor. In this state, a first terminal attached to the insulating substrate, a plate-like portion made of a metal material and overlapped with the bottom surface of the insulating substrate, and an eyelet shaft standing on the plate-like portion and inserted through the through-hole of the insulating substrate; And a slider that is rotatably held on the eyelet shaft by caulking the eyelet shaft, and that slides on the resistor. The second terminal has a through-hole in the insulating substrate. An annular recess that is recessed in the thickness direction of the plate-like portion is provided on the outer periphery of the base portion of the eyelet shaft that is inserted into the eyelet, and the periphery of the through-hole on the bottom side of the insulating substrate is positioned in the recess. When the eyelet of the eyelet shaft is caulked when holding the slider on the shaft, The recess digit annular, prevents the root portion of the eyelet shaft to abut strongly with the bottom surface of the through hole surrounding insulating substrate, it is possible to prevent occurrence of breakage or cracks in the insulating substrate made of ceramic material. Further, since there is no need to provide a taper on the insulating substrate, the insulating substrate can be formed from a wet material using a sheet-like ceramic material, so that productivity is improved and cost can be reduced.

The eyelet shaft is formed by drawing the plate-like portion of the second terminal, and is an annular recess that is recessed in the thickness direction of the plate-like portion by crushing the outer peripheral portion of the root portion of the eyelet shaft. Therefore, productivity is further improved and costs can be reduced.
Further, the insulating substrate is made of a flat ceramic material, and the surface and bottom surface of the insulating substrate are formed as flat surfaces without unevenness, and a slider is rotatably mounted on the surface side of the insulating substrate. Since the plate-like portion of the second terminal is arranged on the bottom surface side of the substrate, since there are no uneven portions on the front and back surfaces of the insulating substrate, the insulating substrate can be formed by a wet material using a sheet-like ceramic material. Productivity is improved and costs can be reduced.

  In addition, a resistor is formed on the surface made of a ceramic material, and an insulating substrate having a through-hole in the center portion and a metal plate is attached to the insulating substrate in a state of being electrically connected to the end of the resistor. 1 terminal, the 2nd terminal which has a plate-shaped part which consists of a metal plate, and overlaps with the bottom face of an insulated substrate, and the eyelet axis | shaft which stands in the plate-shaped part and is penetrated by the through-hole of an insulated substrate, and an eyelet axis | shaft caulked And a rotary electric component having a slider that is rotatably held on the eyelet shaft and that slides on the resistor, and the second terminal is a flat metal plate serving as a plate-like portion. A cylindrical eyelet shaft is formed on the metal plate by drawing, and a plate-like portion is formed by crushing the thick wall portion generated at the outer periphery of the root portion of the eyelet shaft during drawing. Since the annular recess recessed in the thickness direction of the metal plate is formed, the second end In the same process as forming a cylindrical eyelet shaft on the metal plate that becomes the plate-like portion of the eyelet by the drawing process, the thickening part generated at the outer periphery of the root part of the eyelet shaft is crushed and processed. Labor-saving is achieved, productivity is improved, and costs can be reduced.

  Embodiments of the present invention are shown in FIGS. 1 is a plan view showing a rotating electrical component of the present invention, FIG. 2 is a front view showing the rotating electrical component of the present invention, FIG. 3 is a side view showing the rotating electrical component of the present invention, and FIG. FIG. 5 is a bottom view showing the rotary electric component of the present invention, FIG. 6 is a plan view showing a state where the slider of the rotary electric component of the present invention is removed, and FIG. FIG. 8 is a plan view showing an insulating substrate of the rotary electric component of the present invention, FIG. 8 is a second terminal before crushing of the rotary electric component of the present invention, (a) is a plan view, and (b) is a sectional view. FIG. 9 shows the second terminal after the crushing process of the rotary electric component of the present invention, (a) is a plan view, and (b) is a sectional view.

  In the figure, the insulating substrate 1 is made of a ceramic material which is an insulating material, has a substantially rectangular shape, and has a circular through hole 1c provided through the center from the surface 1a to the bottom surface 1b. A pair of convex locking edges 1e, 1e provided at the ends of one opposing pair of side surfaces 1d, 1d, and a plate of the insulating substrate 1 adjacent to the pair of locking edges 1e, 1e It has a pair of concave-groove parts 1f and 1f penetrating in the thickness direction. In this case, the width dimension between the opposing side surfaces 1d and 1d of the insulating substrate 1 and the dimension between the convex portions of the pair of convex locking edge portions 1e and 1e are the same dimension, that is, the same plane. Is formed. (See Figure 7)

  Further, the other pair of opposite side surfaces (upper and lower surfaces in FIG. 7) 1g and 1h of the insulating substrate 1 are provided with a recess 1i and a recess 1j, respectively, and these recesses 1i and 1j are a pair of side surfaces 1g, It is in a state of being depressed from 1h. Further, on the surface 1a of the insulating substrate 1, an arc-shaped (horse-shoe-shaped) resistor 2 made of a cermet resistor paste or the like is formed on the outer periphery of the through-hole 1c by a method such as printing, and further cermet silver A pair of electrodes 3 made of paste or the like are printed and formed in a state where they are connected to both ends of the resistor.

  Moreover, the insulating substrate 1 of the present invention is formed of a flat ceramic material, and the surface 1a and the bottom surface 1b of the insulating substrate 1 are formed as flat surfaces having no uneven portions. Thus, since there is no uneven part in the surface 1a and the bottom face 1b of the insulating substrate 1, the insulating substrate 1 can be formed of a wet material using a sheet-like ceramic material called a so-called green sheet, so that productivity is improved. As a result, the cost can be reduced.

  Further, on one opposing side surface 1d, 1d of the insulating substrate 1, a convex locking edge portion 1e and a concave groove portion 1f penetrating in the plate thickness direction of the insulating substrate 1 adjacent to the locking edge portion 1e are provided. Since the width dimension between one opposing side surfaces 1d and 1d of the insulating substrate 1 and the dimension between the convex portions of the locking edge portions 1e and 1e are formed to be the same, the locking edge portion 1e is provided. The convex portion can be easily formed by providing a through-hole serving as the concave groove portion 1f in the sheet-shaped ceramic plate serving as the base material at the stage of manufacturing the insulating substrate 1, and the productivity is good. Moreover, since the protruding dimension of the convex portion of the locking edge portion 1e can be increased, the later-described first terminal 4 can be more reliably prevented from coming off.

  The pair of first terminals 4 made of a metal plate includes a flat bottom plate 4a, a slightly wide first leg portion 4b that is bent upward at a substantially right angle from an end of the bottom plate 4a, and the first terminal 4b. And a second leg portion 4c having a slightly narrower width and bent upward from a side end of the bottom plate 4a at a position orthogonal to the leg portion 4b. The first leg 4b extends to the surface 1a side of the insulating substrate 1 along the other side surface 1h located between the one opposing side surfaces 1d and 1d of the insulating substrate 1, and at the tip thereof. The connection pieces 4d and 4d divided into two are provided, and the front end sides of these connection pieces 4d and 4d are formed so as to be greatly expanded with respect to the interval between the base portions of the connection pieces 4d and 4d. Further, the second leg 4c is formed to be shorter than the first leg 4b because the second leg 4c has no connection piece.

  Moreover, the bottom plate 4a of the pair of first terminals 4 is provided with a cutting portion 4e when the first terminal 4 is cut from a connecting portion with a hoop material when the first terminals 4 are continuously formed. And when the 1st terminal 4 is attached to the insulated substrate 1, while the cutting part 4e of the baseplate 4a of the 1st terminal 4 is located between a pair of 1st leg parts 4b and 4b, It arrange | positions so that it may be located in the recessed part 1j provided in the side 1h shown below in FIG.1 and FIG.7 among a pair of other opposing side surfaces.

  As described above, the recess 1j is provided on the other side surface 1h of the insulating substrate 1 which is attached to the insulating substrate 1 and is positioned between the first legs 4b of the pair of first terminals 4, and the first side is provided in the recess 1j. Since the cutting portion 4e that cuts from the connecting portion with the hoop material when the terminals 4 are continuously formed is disposed, the cutting portion 4e from the hoop material of the first terminal 4 is provided inside the insulating substrate 1. Therefore, the cut portion 4e of the first terminal 4 does not protrude outward from the side surface 1h among the opposing side surfaces of the insulating substrate 1, and the rotary electric component using the insulating substrate of the present invention is obtained by image processing or the like. It can be mounted on a printed circuit board with high accuracy.

  The first terminal 4 has a bottom plate 4a positioned on the bottom surface 1b of the insulating substrate 1 and a pair of convex locking edges 1e provided with second leg portions 4c at the ends of the pair of side surfaces 1d. And the first leg portion 4b is positioned along the other side surface (lower surface in FIG. 7) 1h of the insulating substrate 1 perpendicular to the side surface 1d. 4d and 4d are positioned so as to extend from the surface 1a. At this time, since the second leg portion 4c has a short length because it does not have a connecting piece, the second leg portion 4c is linearly arranged within the range of the thickness of the side surface 1d so that the tip thereof is positioned on the side surface 1d of the insulating substrate 1. Has been.

In this state, the connection pieces 4d and 4d, which are divided into two at the tip of the first leg 4b, are bent toward the surface 1a side of the insulation substrate 1, and the insulation substrate 1 is formed by the bottom plate 4a and the connection pieces 4d and 4d. As a result, the first terminal 4 is attached to the insulating substrate 1. At this time, the connection pieces 4d and 4d are positioned on the upper surface of the electrode 3 connected to the end of the resistor 2 provided on the surface 1a of the insulating substrate 1.
Thereafter, the connection pieces 4d and 4d are soldered (not shown) to the electrode 3, whereby the first terminal 4 and the electrode 3 are electrically connected (conducted), and the first terminal 4 is connected to the insulating substrate. 1 is attached.

  As described above, the first leg portion 4b of the first terminal 4 is formed on the insulating substrate 1 along the side surface 1h which is one of the other side surfaces located between the one opposing side surfaces 1d and 1d of the insulating substrate 1. While extending to the surface 1a side, the tip of the first leg 4b is divided into two to provide connection pieces 4d and 4d, and the two connection pieces 4d and 4d are on the surface 1a side of the insulating substrate 1. The connecting pieces 4d and 4d are bent and soldered to the electrode 3, and the tip end of the first leg 4b is divided into a plurality of connecting pieces 4d. It can be bent, and damage to the insulating substrate 1 can be suppressed.

  Further, since the space between the connection pieces 4d and 4d which are expanded and divided into two at the tip end of the first leg 4b becomes a solder pool, the first terminal 4 is mounted on a printed circuit board (not shown) for mounting. When soldering by hand soldering, even if the solder between the connection pieces 4d and 4d is melted, most of the melted solder can be retained there. 3 can be maintained, and the area of the solder pool can be increased, so that the connection reliability is further improved.

  The second terminal 5 made of a metal plate includes a plate-like portion 5a serving as a base, an eyelet shaft 5b erected in a cylindrical shape on the plate-like portion 5a, and a substantially right angle upward from the end of the plate-like portion 5a. The second terminal 5 has a bent piece 5c in a state where the plate-like portion 5a is positioned on the bottom surface 1b of the insulating substrate 1 and the bent piece 5c is on the other side of the insulating substrate 1. 1 and 7, the eyelet shaft 5b is provided in the center of the insulating substrate 1 so as to penetrate from the surface 1a to the bottom surface 1b. It is inserted into a circular through hole 1c.

  The plate-like portion 5a of the second terminal 5 has an annular recess 5d that is recessed in the thickness direction of the plate-like portion 5a on the outer periphery of the root portion of the eyelet shaft 5b inserted through the through hole 1c of the insulating substrate 1. The peripheral edge 1k of the through hole 1c on the bottom surface side of the insulating substrate 1 is located in the recess 5d. In this case, the eyelet shaft 5b is formed by drawing the plate-like portion 5a of the second terminal 5, and the outer periphery of the root portion of the eyelet shaft 5b is crushed by a press or the like to form a plate-like shape. An annular recess 5d that is recessed in the thickness direction of the portion 5a is formed.

As a manufacturing method of the second terminal 5, first, a flat plate-like portion 5a is formed by punching a metal plate with a press or the like, and then a bent piece 5c is formed by bending. Next, the plate-like portion 5a is drawn to form a cylindrical eyelet shaft 5b having a hollow portion on the plate-like portion 5a (see FIG. 8). At this time, the thick portion 5e generated at the outer periphery of the root portion of the eyelet shaft 5b at the time of the drawing operation of the eyelet shaft 5b is crushed with a press or the like at the same time as the eyelet shaft 5b. An annular recess 5d is formed to be recessed (see FIG. 9).
As another manufacturing method of the second terminal 5, first, a flat plate-like metal plate to be the plate-like portion 5a is drawn to form a cylindrical eyelet shaft 5b on the metal plate. At the same time as the drawing process, an annular recess 5d that is recessed in the thickness direction of the metal plate is formed by crushing the thick part 5e generated at the outer periphery of the root part of the eyelet shaft 5b during the drawing process of the eyelet shaft 5b. Form. Thereafter, the metal plate on which the eyelet shaft 5b is formed is punched with a press or the like to form a flat plate-like portion 5a, and then the bent piece 5c is formed by bending. . In any of the manufacturing methods, in the drawing process for forming the eyelet shaft 5b, the thick portion 5e generated on the outer periphery of the root portion of the eyelet shaft 5b is crushed to form the recess 5d. ing.

  In this way, the flat eyelet shaft 5b is formed on the metal plate by drawing the flat metal plate that becomes the plate-like portion 5a of the second terminal 5, and at the same time as the drawing operation, the eyelet shaft 5b. Since the thick-walled portion 5e generated at the outer peripheral portion of the base portion is crushed to form the annular recess 5d that is recessed in the plate thickness direction of the metal plate to be the plate-like portion 5a, the second terminal 5 In order to crush the thick part 5e generated at the outer periphery of the root part of the eyelet shaft 5b in the same process as forming the cylindrical eyelet shaft 5b on the metal plate to be the plate-like part 5a, The machining process is labor-saving, the productivity is improved, and the cost can be reduced.

  The slider 6 is made of a metal plate having a spring property, and includes an upper plate 6b having a cross-shaped hole 6a, a lower plate 6d having a sliding portion 6c, and a bulging portion 6e provided on the lower plate 6d. And a circular hole 6f provided in the center of the bulging portion 6e, and the upper plate 6b and the lower plate 6d are folded in two and formed integrally. The slider 6 has the bulging portion 6e positioned on the surface 1a of the insulating substrate 1, and the circular hole 6f inserted through the eyelet shaft 5b inserted into the through hole 1c of the insulating substrate 1. The slider 6 is rotatably attached to the insulating substrate 1 by crimping the tip of the eyelet shaft 5b with a press or the like.

  Then, by inserting a screwdriver (not shown) into the cross-shaped hole 6 a and rotating the slider 6, the sliding portion 6 c slides on the resistor 2 formed on the surface 1 a of the insulating substrate 1. Accordingly, the resistance value between the first terminal 4 and the second terminal 5 can be varied.

  In the present invention, the insulating substrate 1 is made of a flat ceramic material, and the surface 1a and the bottom surface 1b of the insulating substrate 1 are formed as flat surfaces without unevenness, and the slider 6 is provided on the surface 1a side of the insulating substrate 1. Since the plate-like portion 5a of the second terminal 5 is placed on the bottom surface 1b side of the insulating substrate 1 so as to be rotatable, there is no uneven portion on the front and back surfaces of the insulating substrate 1, so that it is referred to as a green sheet. Since the insulating substrate 1 can be formed from a wet material using a sheet-like ceramic material, productivity is improved and costs can be reduced.

  According to the above embodiment of the present invention, the second terminal 5 has an annular shape that is recessed in the thickness direction of the plate-like portion 5a on the outer peripheral portion of the root portion of the eyelet shaft 5b inserted through the through hole 1c of the insulating substrate 1. Since the peripheral edge 1k of the through hole 1c on the bottom surface 1b side of the insulating substrate 1 is positioned in the concave 5d, the sliding held by the eyelet shaft 5b by caulking the eyelet shaft 5b When the child 6 is attached (when the eyelet shaft 5b is caulked), the base portion of the eyelet shaft 5b is connected to the bottom surface around the through hole 1c of the insulating substrate 1 by the annular recess 5d provided on the outer periphery of the base portion of the eyelet shaft 5b. A strong contact can be prevented, and cracking and cracking of the insulating substrate 1 made of a ceramic material can be prevented. In addition, since it is not necessary to provide the insulating substrate 1 with a taper, the insulating substrate 1 can be formed of a wet material using a sheet-like ceramic material, so that productivity is improved and costs can be reduced. .

It is a top view which shows the rotary electric component of this invention. It is a front view which shows the rotary electrical component of this invention. It is a side view which shows the rotary electrical component of this invention. It is sectional drawing which shows the rotary electric component of this invention. It is a bottom view which shows the rotary electric component of this invention. It is a top view which shows the state which removed the slider of the rotary electric component of this invention. It is a top view which shows the insulated substrate of the rotary electric component of this invention. The 2nd terminal before the crushing process of the rotary electric component of this invention is shown, (a) is a top view, (b) is sectional drawing. The 2nd terminal after the crushing process of the rotary electric component of this invention is shown, (a) is a top view, (b) is sectional drawing. It is principal part sectional drawing which shows the conventional rotary electrical component.

Explanation of symbols

1: Insulating substrate 1a: Front surface 1b: Bottom surface 1c: Through hole 1d: Side surface 1e: Locking edge portion 1f: Groove groove portion 1g: Side surface 1h: Side surface 1i: Recessed portion 1j: Recessed portion 1k: Peripheral portion 2: Resistor 3: Electrode 4: 1st terminal 4a: Bottom plate 4b: 1st leg 4c: 2nd leg 4d: Connection piece 4e: Cutting part 5: 2nd terminal 5a: Plate-like part 5b: Eyelet shaft 5c: Bending piece 5d : Recessed portion 5e: thick portion 6: slider 6a: hole 6b: upper plate 6c: sliding portion 6d: lower plate 6e: bulging portion 6f: hole

Claims (4)

  A resistor is formed on the surface made of a ceramic material, and an insulating substrate having a through-hole in the center, and a metal plate made of a metal material and connected to the end of the resistor is attached to the insulating substrate. A second terminal having one terminal, a plate-like portion made of a metal material and overlapped with a bottom surface of the insulating substrate, and an eyelet shaft standing on the plate-like portion and inserted into the through hole of the insulating substrate; And a slider that is rotatably held by the eyelet shaft when the eyelet shaft is caulked, and that slides on the resistor. The second terminal is inserted into the through hole of the insulating substrate. An annular recess that is recessed in the thickness direction of the plate-like portion is provided in the outer peripheral portion of the root portion of the eyelet shaft, and the periphery of the through hole on the bottom surface side of the insulating substrate is positioned in the recess. Rotating electrical parts characterized by   The eyelet shaft is formed by drawing the plate-like portion of the second terminal, and is recessed in the plate thickness direction of the plate-like portion by crushing the outer peripheral portion of the root portion of the eyelet shaft. 2. The rotating electrical component according to claim 1, wherein the annular recess is formed.   The insulating substrate is made of a flat ceramic material, and the surface and bottom surface of the insulating substrate are formed as flat surfaces without unevenness, and the slider is rotatably mounted on the surface side of the insulating substrate, The rotary electric component according to claim 1, wherein the plate-like portion of the second terminal is disposed on a bottom surface side of the insulating substrate.   A resistor is formed on the surface made of a ceramic material, and an insulating substrate having a through-hole in the central portion, and a metal plate that is connected to the end of the resistor and is attached to the insulating substrate. A second terminal having one terminal, a plate-shaped portion made of a metal plate and overlaid on the bottom surface of the insulating substrate, and an eyelet shaft standing on the plate-shaped portion and inserted into the through hole of the insulating substrate; A rotary electric component having a slider that is rotatably held by the eyelet shaft by caulking the eyelet shaft and that slides on the resistor, wherein the second terminal has the plate shape A cylindrical eyelet shaft is formed on the metal plate by drawing the flat plate-shaped metal plate to be a part, and is generated at the outer peripheral portion of the root portion of the eyelet shaft during the drawing processing. Before becoming a plate-like part by crushing the thick part Rotary electric part manufacturing method characterized by forming an annular recess recessed in the thickness direction of the metal plate.

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