CN100412999C - Surface mounting type variable resistor, and method of producing the same - Google Patents
Surface mounting type variable resistor, and method of producing the same Download PDFInfo
- Publication number
- CN100412999C CN100412999C CNB028172191A CN02817219A CN100412999C CN 100412999 C CN100412999 C CN 100412999C CN B028172191 A CNB028172191 A CN B028172191A CN 02817219 A CN02817219 A CN 02817219A CN 100412999 C CN100412999 C CN 100412999C
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- contact site
- driver slot
- variable resistor
- substrate
- insulated substrate
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- Expired - Fee Related
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/30—Adjustable resistors the contact sliding along resistive element
- H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C10/00—Adjustable resistors
- H01C10/005—Surface mountable, e.g. chip trimmer potentiometer
Abstract
The invention provides a surface mounting type variable resistor in which a driver slot constituting portion and the flange of a contact portion do not easily open. Projecting pieces 9d1, 9d2 extend outward from the outer periphery of a driver slot constituting portion 9e. The projecting pieces 9d1, 9d2 are folded to extend around to the back of the flange 9i of the contact portion, and the driver slot constituting portion 9e and the flange 9i are superposed and joined.
Description
Technical field
The present invention relates to surface mounting type variable resistor and manufacture method thereof.
Background technology
Open disclosed surface mounting type variable resistor in the past in the flat 3-270103 communique etc. the spy and comprise that the surface has the insulated substrate that variable resistor body pattern, this pattern surround substrate through hole one end that connects thickness direction; Metallic slide plate parts, these slide plate parts comprise: the integrally formed self-cleaning contact that can slide on power transformation resistance body pattern, the insulated substrate surface portion contact of surrounding with variable resistor body pattern and the contact site with contact site through hole of corresponding through hole, have driver slot and driver slot formation portion that overlaps and the connecting portion that links contact site and driver slot on contact site; Have tubular axial region that is inserted into substrate through hole and contact site through hole and the end that is positioned at the insulated substrate rear side that is connected the tubular axial region, the splicing ear portion of extending integratedly, will make that the slide plate parts are the intermediate terminal of center rotation with the tubular axial region from the fore-end distortion of the outstanding tubular axial region of contact site through hole along the back side of insulated substrate.The contact site of slide plate parts have the bottom wall portion that forms the contact site through hole, with bottom wall portion continuously and from bottom wall portion erect the surrounding wall portion of coming, with surrounding wall portion continuously and in the structure of the flange part that extends along the surface direction of insulated substrate; Under the folding state once of connecting portion, the part of driver slot formation portion overlaps with the flange part of contact site.
In addition, open in the flat 3-270103 communique etc. disclosed surface mounting type variable resistor in the past the spy and comprise having variable resistor body pattern from the teeth outwards, make it surround the certain insulated substrate of an end, thickness of the substrate through hole that connects thickness direction; Having the self-cleaning contact that slides on variable resistor body pattern contacts with surface portion with the insulated substrate that is surrounded by variable resistor body pattern and has slide plate parts that conductivity is arranged corresponding to the contact site of the contact site through hole of through hole; Have the end that is positioned at the insulated substrate inboard that is inserted into the tubular axial region in substrate through hole and the contact site through hole and is connected the tubular axial region, the splicing ear portion of extending integratedly along the insulated substrate back side, will be from the fore-end distortion of the outstanding tubular axial region of contact site through hole, make that the slide plate parts are the intermediate terminal of center rotation with the tubular axial region.In surface mounting type variable resistor, when being welded on the circuit substrate, solder flux takes place sometimes from invading the situation on the variable resistor body pattern between middle terminal and insulated substrate to the surface mounting type variable resistor soldering.If speckle with solder flux on the variable resistor body pattern, the problem of resistance change will take place.In the conventional art, form insulated substrate, and form the solder flux hole recess of accumulating solder flux, prevent that solder flux from rising on the variable resistor pattern in the rear side of insulated substrate by sintering ceramic powder.
But surface mounting type variable resistor in the past only by connecting portion is folded once to come the part of driver slot formation portion is overlapped with the flange part of contact site, therefore exists the problem of the flange part disengaging of driver slot part and contact site.
In addition, when making the insulated substrate of surface mounting type variable resistor,, the substrate cost is improved, be difficult to reduce the price of surface mounting type variable resistor because the worker ordinal number increases with sintering ceramic powder.
Summary of the invention
The purpose of this invention is to provide the surface mounting type variable resistor that the flange part of a kind of driver slot formation portion and contact site can simply not break away from.
Another object of the present invention provides a kind of surface mounting type variable resistor that improves soldering face mechanical strength.
A further object of the present invention is to reduce the price of the surface mounting type variable resistor that adopts the ceramic insulated substrate that has the solder flux hole on the path that can pass to variable resistor body pattern.
Other purpose of the present invention provides a kind of under the situation of having used ceramic green sheet on the insulated substrate, can form the manufacture method of the surface mounting type variable resistor in solder flux hole on the path that passes to variable resistor body pattern easily.
Another object of the present invention provides the high surface mounting type variable resistor of a kind of mechanical strength.
Improve the surface mounting type variable resistor of object as the present invention, comprising: insulated substrate, surface have the variable resistor body pattern of an end that is enclosed in the substrate through hole that connects on the thickness direction; Metal slide plate parts comprise integratedly: the self-cleaning contact that slides on the variable resistor body pattern, the insulated substrate surface portion contact of surrounding with variable resistor body pattern and the contact site with contact site through hole of corresponding through hole, have driver slot and the driver slot formation portion that overlaps with contact site, and be connected the connecting portion of contact site and driver slot; Intermediate terminal, have integratedly: insert in substrate through hole and the contact site through hole the tubular axial region be connected the splicing ear portion that the tubular axial region is positioned at the end of described insulated substrate rear side and extends in the insulated substrate, and for making the slide plate parts can be the center rotation with the tubular axial region, will give prominence to the fore-end distortion of the described tubular axial region of contact site through hole; The contact site of slide plate parts has the surrounding wall portion that comprises the bottom wall portion that forms the contact site through hole, be connected with bottom wall portion and erect from bottom wall portion, be connected with surrounding wall portion and to the structure of the flange part that extends along the insulated substrate surface direction; With the folding state once of connecting portion, the part of driver slot is overlapped with the flange part of contact site.
In used in the present invention contact site and the driver slot formation portion, on the position relative with connecting portion, by driver slot being constituted portion near the flange part of contact site, formed chimerism, be respectively the chimeric fitting portion of contact site and driver slot formation portion and by fitting portion.On a side of the flange part of contact site and driver slot formation portion, be provided with more than one protrusion tab integratedly, crooked protrusion tab makes the part that the parts of protrusion tab are not set in flange part and the driver slot formation portion, is clipped between the parts and protrusion tab that are provided with protrusion tab.So, because fitting portion and become chimerism by fitting portion closes the crooked protrusion tab of state with false knot, so that buckling work becomes is easy.Owing to can make the reliable combination of flange part and driver slot formation portion by crooked protrusion tab, flange part and driver slot formation portion are difficult for breaking away from addition.In addition, also can suitably stipulate the number and the position of protrusion tab, flange part and driver slot formation portion are difficult for separately.
Preferably protrusion tab is arranged to extend laterally from the peripheral part of driver slot formation portion.At this moment, crooked protrusion tab makes its inboard bending to flange part.From driver slot formation portion side protrusion tab is carried out bending machining like this, easily.
Be preferably in one group of protrusion tab is set in the driver slot formation portion, binding is sandwiched in therebetween by fitting portion with by the chimeric embedded structure portion that forms of fitting portion and the dummy line of connecting portion.Like this, owing to formed two embedded structures that form by two protrusion tabs in the both sides of aforementioned embedded structure portion, can be firmly with three position fixed drive groove formation portions and flange part.
The splicing ear portion of intermediate terminal and the portion of terminal one of standing up of extending along the end face of insulated substrate; The portion of terminal of standing up has the metallic plate that will constitute this portion of terminal and forms overlapping structure at the crooked of its length direction midway.Adopt the crooked structure that overlaps the portion of terminal of standing up, can improve the mechanical strength of opposing external force, the portion of terminal distortion can prevent to stand up when assembling and when being installed to variable resistance on the circuit substrate.
On insulated substrate, form to the both direction of thickness direction with this thickness direction quadrature and court and leave the ditch portion of the direction opening of insulated substrate, and the terminal that will stand up is entrenched in the ditch portion.Thus, owing to the latch of portion of terminal that stand up, can prevent that intermediate terminal from rotating with the slide plate parts as intermediate terminal.
In addition, the variable resistance slide plate parts as the present invention improves object comprise: contact site has the self-cleaning contact that slides and rotates on insulated substrate around pivot on variable resistor body pattern; Driver slot formation portion has driver slot and overlaps on the contact site; And connecting portion, connect contact site and driver slot.Contact site comprises: the bottom wall portion that contacts with insulated substrate and rotate thereon; Link to each other with bottom wall portion and erect the surrounding wall portion of coming from bottom wall portion; Link to each other with surrounding wall portion and along the upwardly extending flange part in the side on insulated substrate surface.With the folding state once of connecting portion the flange part of contact site is overlapped with the part of driver slot formation portion.
In contact site in the present invention and the driver slot formation portion, on the position relative with connecting portion, by driver slot being constituted portion near the flange part of contact site, formed chimerism, be respectively the chimeric fitting portion of contact site and driver slot formation portion and by fitting portion.On a side of the flange part of contact site and driver slot formation portion, be provided with more than one protrusion tab integratedly, crooked protrusion tab makes the part that the parts of protrusion tab are not set in flange part and the driver slot formation portion, is clipped between the parts and protrusion tab that are provided with protrusion tab.Thus, because by protrusion tab overlapping holding flange portion and driver slot formation portion, the flange part of contact site and driver slot formation portion are not easy to break away from.
In addition, improve the surface mounting type variable resistor of object, comprise the insulated substrate of the ceramic that gauge is certain, have the variable resistor body pattern of an end that is enclosed in the substrate through hole that thickness direction connects on the surface as the present invention; Conductivity slide plate parts have the self-cleaning contact that slides on variable resistor body pattern, contact with the surface portion of the described insulated substrate that is surrounded by variable resistor body pattern and have a contact site corresponding to the contact site through hole of through hole; Intermediate terminal, have integratedly: the tubular axial region that inserts substrate through hole and contact site through hole with is connected with end that the tubular axial region is positioned at the insulated substrate inboard and along the splicing ear portion of the inboard extension of insulated substrate, and for making the slide plate parts can be the center rotation with the tubular axial region, the fore-end distortion from the outstanding tubular axial region of contact site through hole.
In the present invention, the shape of cross section of substrate through hole is made polygon.Like this, at the substrate through hole be inserted between the tubular axial region outer surface of intermediate terminal of this substrate through hole and formed the gap.In this gap, retain the solder flux that enters the small gap between the insulated substrate back side and intermediate terminal, thereby can prevent that solder flux from rising on the variable resistor body pattern on the insulated substrate and make variable resistor body pattern attach solder flux.
When the shape of cross section of substrate through hole is roughly quadrangle, the size of regulation shape of cross section, make in the substrate through hole and between four angles of extending on the insulated substrate thickness direction and cylindric axial region formed gap become solder flux and accumulate portion, prevent to rise to the surface of insulated substrate from the solder flux that the substrate inboard enters in the substrate through hole.If the gap between angle and the cylindric axial region is big, then when operation slide plate parts, produce big deviation, so stipulate that preferably the size of the size on four limits of substrate through hole and cylindric axial region is approaching.
The splicing ear portion of the intermediate terminal that can use in the present invention is with the portion of terminal one of standing up of extending along the end face of insulated substrate.And, on the both sides of insulated substrate thickness direction, make and the ditch portion of the chimeric portion of terminal of standing up of the direction opening of insulated substrate is left by thickness direction quadrature and court.And,, when the rotary manipulation driver slot, can prevent that intermediate terminal from rotating together because the portion of terminal of standing up is entrenched in ditch portion.
Method of the present invention is that insulated substrate adopts the sintering raw cook to fire the ceramic substrate that forms.In this case, the raw cook stage before sintering forms the substrate through hole of insulated substrate.Owing on raw cook, form the substrate through hole by punching press easily, can reduce the manufacturing cost of surface mounting type variable resistor.
In addition, if on the raw cook before sintering, the substrate through hole of above-mentioned ditch portion and insulated substrate forms simultaneously, then can further reduce the manufacturing cost of surface mounting type variable resistor.
Description of drawings
Fig. 1 (A)～(C) is respectively the vertical view of vertical view, upward view and partly cut-away of an embodiment of surface mounting type variable resistor of the present invention.
Fig. 2 (A) is the II-IIA line profile of Fig. 1 (A); Fig. 2 (B) is the end view of the variable resistance of Fig. 1.
Fig. 3 is the schematic diagram of the stamped sheet metal when forming the slide plate parts by punching press.
Embodiment
With reference to the accompanying drawings, describe embodiments of the invention in detail.Fig. 1 (A)～(C) is respectively the vertical view of vertical view, upward view and partly cut-away of an embodiment of surface mounting type variable resistor of the present invention; Fig. 2 (A) and (B) be the end view of the variable resistance of the II-IIA line sectional view of Fig. 1 (A) and Fig. 1; Fig. 3 is the schematic diagram of the stamped sheet metal when forming slide plate parts described later by punching press.Fig. 3 is not accurate view in addition, and detail section and other figure are not the same.In these figure, parts shown in the mark 1 are to fire the insulated substrate that ceramic substrate constituted that forms by the sintering raw cook.The gauge of this insulated substrate 1 is certain.
Shown in Fig. 1 (C), on the surperficial 1a of this insulated substrate 1 roughly circular-arc variable resistor body pattern 3 around the end of aftermentioned substrate through hole 1e.In addition, on surperficial 1a, form pair of electrodes sign 5a and the 5b that connects these variable resistor body pattern 3 two ends.Roughly circular-arc resistive element pattern 3 needn't be circular arc completely, can be comprise the shape of a hoof known can be used for variable-resistance all shapes of rotary type.In addition, electrode sign 5a and 5b are made by the low conductive material of resistivity (for example silver, copper etc.).In the present embodiment, electrode sign 5a and 5b are made may extend on the insulated substrate 1 on a pair of outstanding position 1b and 1c.In addition, about the shape and size of electrode pattern 5a and 5b, as long as determine can with metal terminal 7a and 7b constitute be electrically connected just can, and needn't extend to the end of protuberance 1b and 1c.
Chimeric cross sectional shape is roughly the metal terminal 7a and the 7b of コ word shape on protuberance 1b and 1c.Among these metal terminals 7a and the 7b, the length of holding piece of back side 1d side that is positioned at insulated substrate 1 is than the clamping length of a film of the face side 1a that is positioned at insulated substrate.When only being electrically connected metal terminal 7a and 7b and electrode sign 5a and 5b by contact, need to stipulate the width dimensions of thickness direction of the chimeric recess of metal terminal 7a and 7b, make metal terminal 7a and 7b can not break away from protuberance 1b and 1c easily.In addition, using bonding agent or tinol with under metal terminal 7a and 7b and electrode sign 5a and the situation that 5b is connected, must stipulate the width dimensions of the thickness direction of metal terminal 7a and the chimeric recess of 7b, make between metal terminal 7a and 7b and protuberance 1b and 1c, to form bond layer or the soldering-tin layer of stipulating.In the present embodiment, only be electrically connected metal terminal 7a and 7b and electrode sign 5a and 5b by contact.In addition, further zinc-plated after copper facing on the iron plate in order to make the easy soldering of metal terminal 7a and 7b to installation base plate, on the attachment surface of scolding tin, implement copper facing and zinc-plated at least.
Metal slide plate parts 9 with conductivity load in substantial middle portion at insulated substrate 1.As shown in Figure 2, slide plate parts 9 are made of following each parts that form one, and it comprises: the travelling arm 9a with the self-cleaning contact 9a1 that slides on variable resistor body pattern 3; Contact with the surface portion of the insulated substrate 1 that is surrounded by variable resistor body pattern 3 and have a contact site 9c corresponding to the contact site through hole 9b of substrate through hole 1e; Has driver slot 9e and the overlapping driver slot formation 9d of portion on contact site 9c; With the connecting portion 9f that is connected contact site 9c and driver slot 9e.
The contact site 9c of slide plate parts 9 comprises the bottom wall portion 9g that is formed with contact site through hole 9b; The surrounding wall portion 9h that connects bottom wall portion 9g and erect from bottom wall portion 9g; Connect surrounding wall portion 9h and along the upwardly extending flange part 9i in the surperficial 1a side of insulated substrate 1.On surrounding wall portion 9h, integrally formed protuberance 9p on 3 positions at 90 ° of intervals.And 90 ° of compartments that do not form protuberance 9p on surrounding wall portion 9h form otch 9q.And, connecting portion 9f is folding once, make it become the state of the part of the overlapping driver slot formation 9d of portion on the flange part 9i of contact site 9c.In contact site 9c and the driver slot formation 9d of portion, on the position relative with connecting portion 9f, form respectively and make the chimeric fitting portion 9j of contact site 9c and the driver slot formation 9d of portion and, to form chimerism near the flange part 9i of contact site 9c by making the driver slot formation 9d of portion by fitting portion 9k.Edge part by described otch 9q constitutes fitting portion 9j, and cuts to start by the flange part 9d3 that driver slot is constituted the 9d of portion and constitute by fitting portion 9k.In the driver slot formation 9d of portion, be wholely set two protrusion tab 9d1 and 9d2, its peripheral part from the driver slot formation 9d of portion is extended laterally.On the driver slot formation 9d of portion, protrusion tab 9d1 and 9d2 are set, make link the embedded structure portion 91 that constitutes by chimeric fitting portion 9j with by fitting portion 9k and the dotted line CL of connecting portion 9f and be sandwiched in therebetween.In addition, needn't on the driver slot formation 9d of portion this protrusion tab be set, this protrusion tab also can be arranged on the flange part 9i of contact site 9c.In addition, the number of protrusion tab is not defined as two, so long as just can greater than one.And the part of the flange part 9i of contact site 9c is clipped between the driver slot formation 9d of portion and protrusion tab 9d1 and the 9d2.That is, protrusion tab 9d1 and 9d2 bend to the inboard of flange part 9i.Fig. 1 (A) and (C) in mark 9m1～9m4 shown in part be the recess that constitutes driver slot.Cut out under the situation of slide plate parts in stamped sheet metal 10, also can cut off by four parts 11 shown in the dotted line from ring-type shown in Figure 3.In addition, if before cut-out that connecting portion 9f is folding once, then also can crooked protrusion tab 9d1 and 9d2.
On the substantial middle part of the insulated substrate 1 shown in Fig. 1 (C), the shape of cross section that forms the thickness direction that connects insulated substrate 1 is roughly tetragonal substrate through hole 1e.In addition, the shape of cross section of substrate through hole 1e is not limited to quadrangle, also can be polygon.In addition, on insulated substrate 1 two sides,, form the 1f of ditch portion of the portion of terminal 13b1 that stands up of chimeric aftermentioned intermediate terminal 13 perpendicular to the outside opening in side.Punching on the raw cook before sintering and form substrate through hole 1e and the 1f of ditch portion simultaneously.
Constitute the intermediate terminal 13 that slide plate parts 9 is rotatably installed in the installing component on the insulated substrate 1, have the cylindric axial region 13a among the contact site through hole 9b on the contact site 9c that is inserted into the through hole 1e that is arranged on the insulated substrate 1 and is arranged on slide plate parts 9 integratedly; Be connected with the end that this cylindric axial region 13a is positioned at insulated substrate 1 back side 1d side, and along the 13b of splicing ear portion that extends at insulated substrate 1 back side 1d.The 13b of splicing ear portion of intermediate terminal 13 further comprises the portion of terminal 13b1 that stands up that extends along insulated substrate 1 side 1d integratedly.The bending machining that this portion of terminal 13b1 that stands up is folded is to improve mechanical strength.Thus in assembling during surface mounting type variable resistor and when being installed on the circuit substrate, the portion of terminal 13b1 that can prevent to stand up distortion.In addition, because the 1f of ditch portion that forms on insulated substrate 1 is chimeric with the portion of terminal 13b1 that stands up, even the rotary slide sheet parts can prevent that also intermediate terminal 13 from rotating with the slide plate parts.
Fore-end 13a1 from the outstanding cylindric axial region 13 of the contact site through hole 9f of slide plate parts 9 is implemented punching press, make its distortion, make that slide plate parts 9 can be the center rotation with cylindric axial region 13a.Shown in Fig. 2 (a), the cylindric axial region 13a of the intermediate terminal 13 before the punching press distortion, its fore-end 13a1 closure.The intermediate terminal 13 of this shape can be by obtaining with a metallic plate drawing simply.In the surface mounting type variable resistor in the past, be fore-end opening, and this open end is processed to the outside of diameter turnup or riveted joint the cylindric axial region of intermediate terminal.And in the present embodiment, the surrounding wall portion of the fore-end 13a1 of cylindric axial region 13a closure is compressed to axis direction, while extends to the outside of the diameter of cylindric axial region 13a, carries out the punching press distortion, forms along the extension 13c of the contact site 9d of slide plate parts 9.
As mentioned above, the shape of cross section of the substrate through hole 1e that forms on insulated substrate 1 is a quadrangle.Shown in Fig. 1 (C), between the outer surface of four the angle 1g of this substrate through hole 1e (in Fig. 1 (C), only having expressed 2 angles) and cylindric axial region 13a, form gap S.Become by this gap S and to accumulate the solder flux that enters into the solder flux in the substrate through hole 1e from the back side 1d side of insulated substrate 1 and accumulate portion.Solder flux is accumulated acting as of portion and is stoped the solder flux that enters in the substrate through hole 1e to rise on the surperficial 1a of insulated substrate 1.
In the above-described embodiments, adopt the portion of terminal 13b1 that stands up that makes intermediate terminal 13 to be fitted to the structure of the 1f of ditch portion of insulated substrate 1, also can not adopt this embedded structure certainly.
Utilizability on the industry
According to the present invention, because by crooked protrusion tab next flange part and driver slot formation section in conjunction with contact site, so can prevent reliably that both from separating.
In addition, according to the present invention, because have the structure of the portion of terminal of standing up of crooked overlapping intermediate terminal, can improve the mechanical strength of this portion of terminal.
Further, according to the present invention, because be provided with the substrate through hole that connects the insulated substrate thickness direction, and shape of cross section is polygon, so that formed the gap at the cylindric axial region of the intermediate terminal that is inserted into this substrate through hole with between a plurality of bights that the thickness direction of insulated substrate extends, and make this gap become the solder flux hole. Therefore, even the inboard face at insulated substrate does not have formation to accumulate the recess that solder flux is used, enter into solder flux in the substrate through hole from the inboard face of insulated substrate and also can be accumulated in the solder flux that this gap forms and accumulate the hole, thereby can prevent that solder flux from rising on the insulated substrate surface. Therefore, according to the present invention, owing to needn't use at the rear side of the substrate expensive substrate with recess, so compare with conventional art, can reduce the price of surface mounting type variable resistor.
In addition, the method according to this invention, owing to use by formed the ceramic substrate of firing after substrate through hole and/or the ditch section at raw cook, simply also qurer is made surface mounting type variable resistor.
Claims (10)
1. surface mounting type variable resistor comprises:
Insulated substrate has the variable resistor body pattern that is enclosed in substrate through hole one end that connects on the thickness direction on its surface;
Metal slide plate parts comprise integratedly: the self-cleaning contact that slides on described variable resistor body pattern, with the surface portion contact of the described insulated substrate that is surrounded by described variable resistor body pattern and have contact site corresponding to the contact site through hole of described through hole, have driver slot and the driver slot formation portion that overlaps, and be connected the connecting portion of described contact site and described driver slot on described contact site;
Intermediate terminal, have integratedly: be inserted into the end of the tubular axial region of described substrate through hole and described contact site through hole and the rear side that is positioned at described insulated substrate that is connected described tubular axial region and the splicing ear portion of extending along the back side of described insulated substrate, and in order to make described slide plate parts can be the center rotation with described tubular axial region, in the fore-end formation distortion of the outstanding described tubular axial region of described contact site through hole;
The described contact site of described slide plate parts has, and comprises the bottom wall portion that forms described contact site through hole; Erect next surrounding wall portion continuously and from described bottom wall portion with described bottom wall portion; With described surrounding wall portion continuously and in structure along the flange part that extends on the described surface direction of described insulated substrate;
With with the folding state once of described connecting portion, the part of overlapping described driver slot formation portion on the described flange part of described contact site is characterized in that:
In described contact site and described driver slot formation portion, form respectively and make the chimeric fitting portion of described contact site and described driver slot formation portion and by fitting portion, make on the position relative, form chimerism by described flange part with the close described contact site of described driver slot formation portion with described connecting portion;
On a side of the described flange part of described contact site and described driver slot formation portion, more than one protrusion tab is set integratedly;
Crooked described protrusion tab makes the part of the parts that described protrusion tab is not set in described flange part and described driver slot formation portion be sandwiched between the parts and described protrusion tab that are provided with described protrusion tab.
2. surface mounting type variable resistor according to claim 1 is characterized in that: described protrusion tab is set, its peripheral part from described driver slot formation portion is extended laterally; Crooked described protrusion tab makes it bend to the inboard of described flange part.
3. surface mounting type variable resistor according to claim 2, it is characterized in that: in described driver slot formation portion, one group of described protrusion tab is set, binding is sandwiched in therebetween by chimeric described fitting portion and the described embedded structure portion that is constituted by fitting portion and the dummy line of described connecting portion.
4. surface mounting type variable resistor according to claim 1 is characterized in that: the described splicing ear portion of described intermediate terminal comprises the portion of terminal of standing up of extending along the side at the described surface of the connection of described insulated substrate and the back side integratedly;
The metallic plate that the described portion of terminal of standing up has by constituting this portion of terminal forms overlapping structure in the bending midway of its length direction.
5. surface mounting type variable resistor according to claim 4 is characterized in that: form on described insulated substrate to the both direction of described thickness direction with this thickness direction quadrature and towards the ditch portion of leaving the direction opening of described insulated substrate; And the described terminal that stands up is entrenched in the described ditch portion.
6. surface mounting type variable resistor according to claim 1 is characterized in that: be polygon on the shape of cross section of described substrate through hole.
7. surface mounting type variable resistor according to claim 6 is characterized in that: described shape of cross section is a quadrangle; Stipulate the size of described shape of cross section, make between four angles of extending on the thickness direction that form and of the inside of described substrate through hole and described tubular axial region formed gap to become to be used to the lip-deep solder flux that stops the solder flux that in described substrate through hole, enters from the rear side of described substrate to rise to described insulated substrate to accumulate portion at described insulated substrate.
8. variable resistance slide plate parts, comprise integratedly: contact site, have the self-cleaning contact that slides and be that the center rotates on insulated substrate with the pivot on the lip-deep variable resistor body pattern of insulated substrate, described variable resistor body pattern surrounds an end of the through hole that runs through the substrate thickness direction; Driver slot formation portion has driver slot and overlaps on the described contact site; And connecting portion, connect described contact site and described driver slot;
Described contact site comprises: the bottom wall portion that contacts with described insulated substrate and rotate thereon; Erect next surrounding wall portion continuously and from described bottom wall portion with described bottom wall portion; With described surrounding wall portion continuously and at the upwardly extending flange part in side along the described surface of described insulated substrate;
The part of the described driver slot formation of coincidence portion on the folding described flange part of state once of described connecting portion at described contact site; It is characterized in that:
In described contact site and described driver slot formation portion, form respectively and make the chimeric fitting portion of described contact site and described driver slot formation portion and by fitting portion, make on the position relative with described connecting portion, form chimerism by described flange part with the close described contact site of described driver slot formation portion
On a side of the described flange part of described contact site and described driver slot formation portion, more than one protrusion tab is set integratedly;
Crooked described protrusion tab makes the part of the parts that described protrusion tab is not set in described flange part and described driver slot formation portion be sandwiched between the parts and described protrusion tab that are provided with described protrusion tab.
9. the manufacture method of a surface mounting type variable resistor, be used to make claim 6 or 7 described surface mounting type variable resistors, it is characterized in that: described insulated substrate is the ceramic substrate that forms by the sintering raw cook, forms described substrate through hole on the described raw cook before sintering.
10. the manufacture method of a surface mounting type variable resistor, be used to make the described surface mounting type variable resistor of claim 5, it is characterized in that: described insulated substrate is the ceramic substrate that forms by the sintering raw cook, forms described substrate through hole and described ditch portion on the described raw cook before sintering.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001267604A JP2003077713A (en) | 2001-09-04 | 2001-09-04 | Surface-mounted variable resistor and method for manufacturing the same |
| JP267604/2001 | 2001-09-04 | ||
| JP267612/2001 | 2001-09-04 | ||
| JP2001267612A JP2003077714A (en) | 2001-09-04 | 2001-09-04 | Surface-mounted variable resistor and slider |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1552079A CN1552079A (en) | 2004-12-01 |
| CN100412999C true CN100412999C (en) | 2008-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028172191A Expired - Fee Related CN100412999C (en) | 2001-09-04 | 2002-09-03 | Surface mounting type variable resistor, and method of producing the same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100412999C (en) |
| WO (1) | WO2003021609A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4979290B2 (en) | 2006-07-21 | 2012-07-18 | 北陸電気工業株式会社 | Variable resistors for surface mounting |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000323305A (en) * | 1999-05-14 | 2000-11-24 | Hokuriku Electric Ind Co Ltd | Surface mounting variable resistor and method of producing the same |
| CN1286479A (en) * | 1999-09-01 | 2001-03-07 | 阿尔卑斯电气株式会社 | Pellet variable resistor |
-
2002
- 2002-09-03 WO PCT/JP2002/008954 patent/WO2003021609A1/en active Application Filing
- 2002-09-03 CN CNB028172191A patent/CN100412999C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000323305A (en) * | 1999-05-14 | 2000-11-24 | Hokuriku Electric Ind Co Ltd | Surface mounting variable resistor and method of producing the same |
| CN1286479A (en) * | 1999-09-01 | 2001-03-07 | 阿尔卑斯电气株式会社 | Pellet variable resistor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1552079A (en) | 2004-12-01 |
| WO2003021609A1 (en) | 2003-03-13 |
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