CN101821821A - Variable resistor - Google Patents
Variable resistor Download PDFInfo
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- CN101821821A CN101821821A CN200880111288A CN200880111288A CN101821821A CN 101821821 A CN101821821 A CN 101821821A CN 200880111288 A CN200880111288 A CN 200880111288A CN 200880111288 A CN200880111288 A CN 200880111288A CN 101821821 A CN101821821 A CN 101821821A
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- pin terminals
- resin substrate
- variable resistance
- interarea
- resin
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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
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
- H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
- H01R13/41—Securing in non-demountable manner, e.g. moulding, riveting by frictional grip in grommet, panel or base
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Adjustable Resistors (AREA)
- Details Of Resistors (AREA)
Abstract
Provided is a variable resistor having a structure manufactured at reduced cost by reducing assembly man-hours with reduced number of constitution part items. In a variable resistor (1), a resin substrate (4) rotatably holds on a resin outer case (3) a rotating shaft (2) wherein a large diameter section (2a) for attaching a sliding element (2b) is integrally formed of resin. The resin substrate is molded of a resin by inserting a connector section (4a) wherein end surfaces of a plurality of columnar pin terminals (4b1-4b3) are exposed from one main surface and the pin terminals (4b1-4b3) are protruded from the other main surface. On the one main surface, a power collector (42) and a resistor (43) are formed to be electrically connected to the exposed end surfaces of the pin terminals (4b1-4b3). The resin substrate (4) is fitted and fixed in the outer case (3) so that the sliding element (2b) is brought into contact with the power collector (42) and the resistor (43).
Description
Technical field
The present patent application relates to by making rotating shaft rotate the rotary-type variable resistance that makes resistance-variable, the particularly structure of the variable resistance of connector integrated type.
Background technology
In various electric equipments such as television receiver, broadcasting receiver, video tape recorder or vehicle and other electric devices, use rotary-type variable resistance.In addition,, begin to limit to use from the viewpoint of environmental protection and contain plumbous scolder, begin to adopt the structure that these variable resistances are formed connector and by connector external circuits such as variable resistance and circuit substrate are electrically connected as nearest tendency.
As such variable resistance that is formed with connector, the known variable resistance that the such structure of patent documentation 1 is arranged.Below, use Fig. 7 that the structure of the variable resistance of patent documentation 1 is described.
As shown in Figure 7, variable resistance 101 has: rotating shaft 102, outer packaging housing 103, substrate 104, lower cover 105.
At the front end of rotating shaft 102 sliding part mounting panel 102a is installed, sliding part 102b is installed at its lower surface.
Upper surface at substrate 104 is formed with not shown resistive element, and sliding part 102b is set to the position relation of sliding on this resistive element.
The 105a of connector portion has bonder terminal 105b, and bonder terminal 105b is electrically connected with resistive element on the substrate 104 by splicing ear 106.
Yet in the structure of such variable resistance 101, it is more to constitute number of components and parts, and assembling will expend the number in man-hour.
Therefore, as described in patent documentation 2,3, the variable resistance of integrally formed with the lower cover that is formed with connector portion by the substrate that will be formed with resistive element, as to reduce amount of parts structure has been proposed.Fig. 8 is the cutaway view for the variable resistance of the patent documentation 3 of the structure that this patent documentation 2,3 is described.
As shown in Figure 8, variable resistance 201 has: rotating shaft 202, outer packaging housing 203, substrate 204.
At the front end of rotating shaft 202 sliding part mounting panel 202a is installed, sliding part 202b is installed at its lower surface.
Upper surface at substrate 204 is formed with not shown resistive element, and sliding part 202b is set to the position relation of sliding on this resistive element.
In addition, substrate 204 and 203 combinations of outer packaging housing form accommodation space.In addition, form the 204a of connector portion that can be electrically connected at substrate 204 with external circuit.
The 204a of connector portion has bonder terminal 204b, and bonder terminal 204b makes metallic plate crooked and form, and its part is exposed the upper surface at substrate 204, is electrically connected with not shown resistive element.
By forming such structure, compare with the structure of Fig. 7, substrate, these 2 formations of lower cover parts become 1, about the number in man-hour of assembling, can reduce that substrate reception is fixed on the operation of lower cover and the operation that the resistive element of substrate is electrically connected with bonder terminal by splicing ear.
In addition, in the structure of patent documentation 2,3, metallic plate is crooked to be formed owing to bonder terminal 204b makes, so makes its shape that is bent into expectation easily, also utilizes punching press and produces in batches from band etc. easily.
Patent documentation 1: Japanese patent laid-open 8-5309 communique
Patent documentation 2: Japanese patent laid-open 8-153608 communique
Patent documentation 3: Japanese patent laid-open 10-55906 communique
Summary of the invention
The problem to be solved in the present invention
Yet, at bonder terminal 204b is to make metallic plate crooked and form and when desiring to make its part to expose substrate 204 surperficial, need be the degree that can connect to the resistive element of substrate surface etc. owing to expose area, therefore shown in patent documentation 2,3, need make the first type surface bending of metallic plate that it is exposed.Preferred scheme is, this expose face be present in roughly same plane, the surface of substrate 204 on.This be because, expose face be not present in roughly same plane, the surface of substrate 204 on the time, the problem that can produce is: the surface at substrate 204 can produce the protuberance of not expecting, can hinder printing to substrate 204 printed resistor bodies or electrode the time, perhaps can hinder slip when sliding part slides.
Yet, when making the metallic plate bending form bonder terminal 204b, because the intrinsic elasticity of metallic plate is difficult to be bent into 90 degree.In addition, when substrate 204 usefulness resins are formed, with embedding mold (insert mold) when burying bonder terminal 204b underground, needing the parts of support and connection device terminal 204b, make the face that exposes of bonder terminal 204b on surface of substrate 204 become and roughly same plane, the surface of substrate 204.
Therefore, for the variable resistance of Fig. 8, when substrate 204 usefulness embedding molds are buried underground bonder terminal 204b, need press pad in the forming metal mould setting, with support and connection device terminal 204b.The hole 204c of Fig. 8 is the vestige that this is extracted by pad.
Complex-shaped metal pattern like this can hinder the miniaturization of variable resistance, also should be noted that when metal pattern takes out in addition.
In addition, since complex-shaped, therefore can become the main cause of machining deviation, and then worry the characteristic deviation of each variable resistance.
The present patent application is finished in view of above problem, and a kind of variable resistance of the structure that can reduce production costs by reducing formation amount of parts and minimizing assembling number in man-hour is provided.
The method that is used to deal with problems
That is, the variable resistance that the claim 1 of the present patent application is related comprises: rotating shaft; Be formed with the collector body that is connected with the sliding part of the front end that is configured in described rotating shaft and the resin substrate of resistive element; And described rotating shaft rotatably kept and take in described resin substrate and have the outer packaging housing that is used for chimeric fixing opening, described variable resistance is characterised in that, on an interarea of described resin substrate, form described collector body and described resistive element, integrally formed connector portion on another interarea of described resin substrate, described connector portion comprises: run through another interarea and bonder terminal that a plurality of pin terminals of outstanding column constitute by an interarea from described resin substrate; And it is outstanding to surround the framework of described bonder terminal from another interarea of described resin substrate, one end of described a plurality of pin terminals has an end face that interarea exposes at described resin substrate, the described end face of the pin terminals of the part in described a plurality of pin terminals is electrically connected with described collector body, and the described end face of remaining pin terminals in described a plurality of pin terminals is electrically connected with described resistive element.
In addition, the related variable resistance of the claim 2 of the present patent application is characterised in that described pin terminals has the side of from one end to the other side extending, and comprises that in described side the described pin terminals of restriction is in the mobile prevention of axially movable axle portion.
And the related variable resistance of the claim 3 of the present patent application is characterised in that, the mobile prevention of the axle portion of described pin terminals be outstanding from described side, be the continuous protuberance of radiation direction at center at axle with described pin terminals.
In addition, the related variable resistance of the claim 4 of the present patent application is characterised in that described pin terminals has the side of from one end to the other side extending, and comprises that in described side the described pin terminals of restriction is the rotation prevention portion that the center is rotated with the axle.
And, the related variable resistance of the claim 5 of the present patent application is characterised in that, described resin substrate has the edge surface that extends between a described interarea and described another interarea, described edge surface has the prolongation wall that extends to described another interarea side, be formed with the holding section at described prolongation wall surface, engage by block base portion with the opening inwall that is formed at described outer packaging housing, described outer packaging housing and described resin substrate is chimeric fixing.
The effect of invention
The variable resistance of the present patent application, owing to bonder terminal is used the pin terminals of a plurality of columns, therefore easily the end face of this pin terminals is exposed at an interarea of resin substrate, the face that exposes of pin terminals is set for the resin substrate surface and become roughly same plane.In addition, when pin terminals is embedded mold to resin substrate, contact with the end face of the pin terminals of column by the plane that makes a metal pattern, the opening in the hole of another metal pattern with the insertion of end face end opposite of pin terminals of column made its supporting, then pin terminals disposes easily, also can not make metal pattern complicated as patent documentation 3.
In addition, in the related variable resistance of the claim 2 of the present patent application,, therefore can prevent moving axially owing to form the mobile prevention of axle portions such as recess or protuberance in the side of pin terminals.That is, when connector portion was inserted other connectors, at the axial application of force of pin terminals, pin terminals can be not outstanding from an interarea of resin substrate.In view of the above, prevented pin terminals in axially movable result, make the resistive element that is connected with the end face of pin terminals or collector body applied power and peel off or produce problem such as bad connection.In addition, when this mobile prevention portion is protuberance, when pin terminals is embedded mold to resin substrate, this protuberance can be used for the axial location of pin terminals, utilize this location, easier make pin terminals expose face and the resin substrate surface becomes roughly same plane.
And, in the related variable resistance of the application's claim 3, utilize outstanding from the side and be the mobile prevention of the axle portion that the continuous protuberance of radiation direction at center forms pin terminals at axle with pin terminals.In view of the above, when pin terminals is embedded mold to resin substrate, effect when not only having the protuberance that this protuberance can be used for the such claim 2 in the axial location of pin terminals, and become out the lid that keeps the hole of usefulness in the pin terminals of another metal pattern at the continuous protuberance of this radiation direction, can prevent that resin from flowing into the hole that pin terminals keeps usefulness.Consequently, can prevent from not wish the resin wanted coupling part attached to bonder terminal.
In addition, in the related variable resistance of the application's claim 4, be the rotation prevention portion that the center is rotated with the axle owing to form restriction in the side of pin terminals, therefore can prevent with the axle is that the center is rotated.That is, prevented because of pin terminals such be that the center is rotated, makes that the resistive element that is connected with the end face of pin terminals or collector body are applied power peels off or produce problems such as bad connection with the axle.
And, in the related variable resistance of the application's claim 5, resin substrate has the edge surface that extends between an interarea and another interarea, edge surface has the prolongation wall that extends to another interarea side, be formed with the holding section at the prolongation wall surface, engage by block base portion with the opening inwall that is formed at the outer packaging housing, outer packaging housing and resin substrate is chimeric fixing.In view of the above, because resin substrate has the prolongation wall that comprises the holding section, this prolongs wall and can overlap with the opening inwall of outer packaging housing, and the holding section that prolongs wall engages with the block base portion of the opening inwall that is arranged on the outer packaging housing and is chimeric fixing, therefore assembling easily can be fixed reliably.
Description of drawings
Fig. 1 is the figure of the related variable resistance 1 of the execution mode of expression the present patent application, (A) is the cutaway view of variable resistance 1, (B) is the vertical view of observing variable resistance 1 from the 4a of connector portion side.
Fig. 2 is the figure of the related resin substrate 4 of the execution mode of expression the present patent application, is the vertical view of observing from an interarea side of resin substrate 4 (A), (B) is the X-X line cutaway view of (A).
Fig. 3 is the cutaway view of the related outer packaging housing 3 of the execution mode of the present patent application.
Fig. 4 is the figure of the related rotating shaft 2 of execution mode of expression the present patent application, (A) is the front view of rotating shaft 2, (B) is the front view of observing from the lower surface of the large-diameter portion 2a of rotating shaft 2.
Fig. 5 is the figure of the related pin terminals 4b1 of the execution mode of expression the present patent application, (A) is front view and the Y-Y line cutaway view of pin terminals 4b1, (B) is the front view and the Y-Y line cutaway view of the variation of pin terminals to (D).
Fig. 6 is the amplification view of connector portion 4 parts of the execution mode of the present patent application related resin substrate 4 when ester moulding.
Fig. 7 is based on the cutaway view of the variable resistance in the past of patent documentation 1.
Fig. 8 is based on the cutaway view of the variable resistance in the past of patent documentation 3.
Embodiment
Below, the execution mode of the present patent application is described based on Fig. 1 to Fig. 4.Fig. 1 (A) is the cutaway view of variable resistance 1, and Fig. 1 (B) is a vertical view of observing variable resistance 1 from the 4a of connector portion side.In addition, Fig. 2 (A) is the vertical view of observing from an interarea side of resin substrate 4, and Fig. 2 (B) is the X-X line cutaway view of Fig. 2 (A).In addition, Fig. 3 is the cutaway view that rotating shaft 2 and resin substrate 4 outer packaging housing 3 before are installed.And Fig. 4 (A) is the front view of rotating shaft 2, and Fig. 4 (B) is the front view of observing from the lower surface of the large-diameter portion 2a of rotating shaft 2.
Shown in Fig. 1 (A), variable resistance 1 has: rotating shaft 2, outer packaging housing 3, resin substrate 4.Distolateral large-diameter portion 2a that is provided with at rotating shaft 2 is equipped with sliding part 2b at its lower surface.Outer packaging housing 3 can keep rotating shaft 2 with rotating freely.Resin substrate 4 is chimeric with outer packaging housing 3, forms accommodation space.In addition, form the 4a of connector portion that can be electrically connected at resin substrate 4 with external circuit.Shown in Fig. 1 (B), the 4a of connector portion has the bonder terminal that the pin terminals 4b1 to 4b3 by a plurality of columns constitutes.
Shown in Fig. 2 (A), (B), the end face of the pin terminals 4b1 to 4b3 of column exposes on an interarea of resin substrate 4.In addition, shown in Fig. 2 (A), in configured electrodes 44 and the electrical connection on the end face of exposing of pin terminals 4b1, in prolongation 42a that exposes the collector body 42 of configuration ring-type on the end face and the electrical connection of pin terminals 4b2, in configured electrodes 45 and the electrical connection on the end face of exposing of pin terminals 4b3.And an end of configuration resistive element 41 on electrode 44 disposes the other end of resistive element 41, and is electrically connected on electrode 45 respectively.
And, on collector body 42, form lubricating film 43, to cover collector body 42.Lubricating film 43 is used for protection collector body 42 when the sliding part 2b of Fig. 1 (A) slides.
In addition, shown in Fig. 2 (A), (B), on an interarea of resin substrate 4, form recess 4c in the inboard of the collector body 42 of ring-type.This is shown in Fig. 1 (A), for the protuberance 2c of the lower surface central authorities that hold the large-diameter portion 2a that is formed at rotating shaft 2.In view of the above, even if make rotating shaft 2 rotations, can not produce axle yet and depart from.The groove 4d of the bottom surface of recess 4c is used to accumulate lubricant, and this lubricant is used to suppress the wearing and tearing that cause owing to rotation between the recess 4c of the protuberance of rotating shaft 2 and resin substrate 4.
In addition, shown in Fig. 2 (B), resin substrate 4 has the wall of prolongation 4e, and this prolongation wall 4e extends to another interarea side opposite with an interarea that is formed with resistive element 41 or collector body 42.In addition, the outstanding holding section 4f that forms on the surface that prolongs wall 4e.
And as shown in Figure 3, externally packaging shell 3 has retaining hole 3a, and 3a is inserted with rotating shaft 2 to this retaining hole, and it is rotatably kept.
In addition, externally packaging shell 3 has opening 3b, and this opening 3b is used to hold resin substrate 4 and chimeric fixing.Opening 3b has flexibility, holds resin substrate 4 easily, and is formed for utilizing elasticity to keep the groove 3c of resin substrate 4.In addition, the inwall formation block base 3d of portion at opening 3b engages with the holding section 4f on the prolongation wall 4e surface that is formed at resin substrate 4 shown in Fig. 2 (B).In addition, outer packaging housing 3 has rotation prevention portion 3e, is used for being rotated when not shown panel is installed variable resistance 1 location.
And shown in Fig. 4 (A), (B), rotating shaft 2 has a large-diameter portion 2a in that one is distolateral, forms the protuberance 2c of the recess 4c that inserts an interarea that is located at resin substrate 4 in its lower surface central authorities.In addition, be formed with 3 caulking part 2d, utilize it that sliding part 2b is installed in large-diameter portion 2a lower surface at the lower surface of large-diameter portion 2a.In addition, for the lower surface that makes large-diameter portion 2a produces predetermined distance with respect to sliding contact 2b1, the 2b2 of sliding part 2b, form depression 2e at the lower surface of large-diameter portion 2a.
The sliding contact 2b1 of sliding part 2b is configured on the resistive element 41 on the interarea of resin substrate 4 and slides, the sliding contact 2b2 of sliding part 2b is configured on the lubricating film 43 of the covering collector body 42 on the interarea of resin substrate 4 and slides.In addition, sliding contact 2b1,2b2 being divided into a plurality of respectively, is in order to make the contact when sliding reliable.
Next, use Fig. 5 that the pin terminals of the column of the bonder terminal that becomes the present patent application is described.In addition, because the formation of other pin terminals 4b2, the 4b3 of above-mentioned execution mode is identical with pin terminals 4b1, be that example describes therefore with pin terminals 4b1.Fig. 5 (A) is the front view of the pin terminals 4b1 that uses in the above-mentioned execution mode and the cutaway view along the Y-Y line shown in the top thereof.Fig. 5 (B) is the variation of pin terminals 4b1 to (D).
Pin terminals 4b1 can be by the wire rod that will be made by copper alloy, for example brass etc., and the heading processing by cold plasticity processing forms and obtains.As the metal that constitutes wire rod, also can be iron or pack fong etc.Under the situation of copper alloy or iron,, utilize the surface treatment of carrying out such as gold-plated or zinc-plated in order to obtain anti-oxidation or conductivity at wire surface.Under the situation of pack fong, also can not need such surface treatment.In addition, heading add man-hour also can and with cutting, therefore but, therefore preferably as far as possible only carry out with heading processing owing to can produce the blanking loss.
End for pin terminals 4b1, an interarea that is formed on the resin terminal shown in Fig. 2 (A), (B) becomes the end face 4b1a that exposes end face, the other end is provided with taper 4b1b as shown in Figure 5, makes when using as bonder terminal the hole of inserting the connector of offside easily.
In addition, on the side of from one end to the other side extending of pin terminals 4b1, be formed with the mobile prevention 4b1c of portion of axle.Utilize this mobile prevention 4b1c of portion, when the 4a of connector portion shown in Fig. 1 (A) inserts the connector of offside, prevent that pin terminals 4b1 from moving axially, prevent that its interarea at the resin substrate 4 shown in Fig. 1 (A) is side-prominent.In addition, in Fig. 5, the mobile prevention 4b1c of portion of axle be the axle with pin terminals 4b1 be the center, at radiation direction continuous protuberance.About preventing this mobile effect, protuberance also can be discontinuous, even axle moved that prevention portion is made of recess and carries out ester moulding around the resin that this part is inserted resin substrate 4, also can obtain same effect, but consider the intensity of pin terminals, preferably the axle with pin terminals is that the center is at the continuous protuberance of radiation direction.
In addition, shown in Fig. 5 (A),, between end face 4b1a and the mobile prevention 4b1c of portion of axle, form the rotation prevention 4b1d of portion in pin terminals 4b1 side.Like that, the cross section of the rotation prevention 4b1d of portion is a flat shown in the Y-Y line cross section above at Fig. 5 (A), like that, becomes from the outstanding shape in the side of pin terminals 4b1 shown in Fig. 5 (A) front view.By forming such shape, when applying pin terminals 4b1 and with the axle be the power of the direction that is rotated of center, the resin acting in conjunction of this rotation prevention 4b1d of portion and resin substrate 4 can be prevented the rotation of pin terminals 4b1.
Next, use Fig. 5 (B) that the variation of pin terminals 4b1 is described to (D).In addition, the identical mark of part mark identical with the pin terminals 4b1 of Fig. 5 (A) omits detailed explanation.
Pin terminals 5b1 is with the different of pin terminals 4b1 of Fig. 5 (A), the shape difference of the rotation prevention 5b1d of portion.That is, shown in Fig. 5 (B), the rotation prevention 5b1d of portion is shaped as, and makes a plurality of protuberances outstanding in the radiation direction that with the axle is the center.In view of the above, under the situation of the rotation prevention 5b1d of portion,, therefore compare, also can prevent rotation for stronger power with the rotation prevention 4b1d of portion of pin terminals 4b1 because the resin of resin substrate 4 can enter between paddy between protuberance.
Pin terminals 6b1 is shown in Fig. 5 (C), and the rotation prevention 6b1d of portion is shaped as, and makes protuberance outstanding at two places of the side of pin terminals 6b1.This structure is because shape is simpler than the rotation prevention 5b1d of portion of Fig. 5 (B), so handling ease.In addition, compare, can be described as a kind of stronger structure of flexing resistance of bending of the length direction for pin terminals 6b1 with the flat rotation prevention 4b1d of portion of Fig. 5 (A).
Pin terminals 7b1 is the shape difference of end face 7b1a with the different of pin terminals 6b1 of Fig. 5 (C) shown in Fig. 5 (D).End face 7b1a is formed with large-diameter portion, this large-diameter portion have than the major part of pin terminals 7b1 with the axial vertical big area of sectional area.Because becoming at an interarea of the resin terminal shown in Fig. 2 (A), (B), the end face 7b1a of pin terminals 7b1 exposes end face, therefore by forming the shape shown in Fig. 5 (D), can increase and move axially the prevention effect, and can increase and Fig. 2 (A), the collector body 42 of (B) or the contact area of electrode 44,45, can improve the reliability of electrical connection.
Next, use the manufacture method of the related variable resistance 1 of figure explanation the present patent application.
At first, utilize ester moulding, form rotating shaft 2 shown in Figure 4.Large-diameter portion 2a, protuberance 2c, caulking part 2d, recess 2e are integrally formed by this ester moulding.In addition,, except that PPS resin, LCP resin, can also exemplify PBT resin or polyamide etc., but preferably contain the raw-material grades of lubrification such as PTFE as the resin that is used to make.In addition, preferably eliminate or sneak into less as far as possible the material of glass fibre.This be because, when making rotating shaft 2 rotation, and outer packaging housing 3 or resin substrate 4 between have the part that produces friction, therefore reducing glass fibre can alleviate the wearing and tearing that this friction causes.
Then, metal plates and strips such as copper alloy are carried out punch process and form the hole of sliding part 2b, the caulking part 2d of rotating shaft 2 is carried out hot riveting by the hole of this sliding part 2b, thereby sliding part 2b is installed at the lower surface of the large-diameter portion 2a of rotating shaft 2.In addition, the shaping of caulking part 2d can also be used ultrasonic wave riveted joint etc. except that hot riveting.
In addition, also utilize ester moulding to form outer packaging housing 3 shown in Figure 3.Retaining hole 3a, opening 3b, groove 3c, the 3d of block base portion, rotation prevention portion 3e are integrally formed by this ester moulding.In addition, as the resin that is used to make, identical with rotating shaft 2, except that PPS resin, LCP resin, can also exemplify PBT resin or polyamide etc., but the reason for identical with rotating shaft 2 preferably contains the raw-material grades of lubrification such as PTFE, preferably eliminates or sneak into less as far as possible the material of glass fibre.
And, also utilize ester moulding to form resin substrate shown in Figure 24.Connector 4a, recess 4c, groove 4d, to prolong wall 4e, holding section 4f integrally formed by this ester moulding.In addition, as the resin that is used to make, preferred PPS resin, LCP resin.This is because to resin substrate 4, at aspects such as intensity or shaping easiness, thermal endurances requirement is arranged especially.
In addition, when resin substrate 4 carries out ester moulding, utilize the embedding mold to bury pin terminals 4b1 to 4b3 underground.Use Fig. 6 that this operation is described.The amplification view of connector portion 4 parts when Fig. 6 is the ester moulding of resin substrate 4.
As shown in Figure 6, between last metal pattern 80a and following metal pattern 80b, form the consistent space of shape with resin substrate 4, pin terminals 4b1 is inserted in advance the hole of the terminal maintenance usefulness that is formed at down metal pattern 80b, inject resin 90 in the space that makes progress under this state between metal pattern 80a and the following metal pattern 80b, by like this resin substrate 4 being carried out ester moulding.
The end face 4b1a of pin terminals 4b1 contacts with the lower surface of last metal pattern 80a, and resin 90 can not spread on the end face 4b1a when injecting resin 90.Therefore, on an interarea of the resin substrate of finishing 4, end face 4b1a exposes.
The mobile prevention 4b1c of portion of axle of pin terminals 4b1 has stipulated that pin terminals 4b1 keeps the outstanding length in hole of usefulness from the terminal that is formed at down metal pattern 80b.That is, be center and because the mobile prevention 4b1c of portion of axle is a axle with pin terminals 4b1 at radiation direction continuous protuberance, compare and will give prominence to the major part of pin terminals 4b1, therefore exceed the hole that can not insert down the terminal maintenance usefulness of metal pattern 80b with top.Therefore, by the end face 4b1a of suitable setting pin terminals 4b1 and the length between the mobile prevention 4b1c of portion of axle, the effect of the location in the time of can playing as configuration makes the end face 4b1a of pin terminals 4b1 contact with the lower surface of last metal pattern 80a.In addition because the mobile prevention 4b1c of portion of axle is a axle with pin terminals 4b1 is the center, at radiation direction continuous protuberance, therefore can cover down the hole of the terminal maintenance usefulness of metal pattern 80b fully.In view of the above, even keep at the terminal of the side of pin terminals 4b1 and following metal pattern 80b having plurality of gaps between the hole of usefulness, but upwards during the space injection resin 90 between metal pattern 80a and the following metal pattern 80b, also can stop resin 90 these gaps of inflow.Therefore, when pin terminals 4b1 is used as bonder terminal,, can reduce production costs because the resin that can prevent from not wish to want can prevent to make such substandard products, so rate of finished products is higher attached to the part that is used to be electrically connected.
Next, on an interarea of the resin substrate 4 of such ester moulding, conductive paste is printed on the precalculated position with predetermined shape,, forms collector body 42, the electrode 44,45 of ring-type with prolongation 42a by heat-treating.As conductive paste, preferably comprise the electroconductive resin of silver particles.In addition, form collector body 42, electrode 44,45 simultaneously, this is preferred scheme on the meaning that reduces process number, but at collector body 42, when electrode 44,45 is different materials, also printing process can be separated.The printing of this conducting paste, heat treated result be, the prolongation 42a, the pin terminals 4b3 that expose end face and collector body 42 that expose end face and electrode 44, pin terminals 4b2 of pin terminals 4b1 expose end face and electrode 45 is electrically connected respectively.
Next, to the resistor paste that contains carbon print, heat treatment, form circular-arc resistive element 41 with this, make on its coated electrode 44,45, and surround collector body 42.
In addition, on collector body 42, utilize printing, heat treatment to form lubricating film 43.This lubricating film 43 is used for protection collector body 42 when sliding part 2b slides, and need be the material with lubrification and conductivity.In addition, resistance value can slightly improve because of lubricating film 43, but because it constitutes collector body 42 is arranged under it, resistance value only can improve the thickness of lubricating film 43 to be measured accordingly, so the resistance value of the material of lubricating film can not brought too big problem.Therefore, can use the resistor paste that comprise carbon identical, when using same material,, therefore can reduce process number, can reduce production costs owing to can carry out simultaneously with printing formation, the heat treatment of resistive element 41 with resistive element 41.
By so above, prepare rotating shaft 2, outer packaging housing 3, resin substrate 4, and, can obtain the such variable resistance of Fig. 11 its assembling.
At first, insert rotating shaft 2, it can be kept with rotating freely to the retaining hole 3a of outside packaging shell 3.Next, resin substrate 4 is pressed into the opening 3b of outer packaging housing 3.At this moment, the opening 3b of outer packaging housing 3 is pressed into resin substrate 4 owing to the groove 3c of the opening 3b that is located at outer packaging housing 3 broadens easily.After being pressed into, the holding section 4f that is formed at the surface that prolongs wall 4e of resin substrate 4 embeds the 3d of block base portion of outer packaging housing 3.
On the other hand,, therefore have elasticity, apply the power that this elasticity produces to the direction of returning original form because outer packaging housing 3 is a resinousness.Though in groove 3c part, because the part desire that broadens of an end restores, so the result can utilize the chucking of holding section 4f and the 3d of block base portion to the directive effect of extrusion resin substrate 4, resin substrate 4 can not be extruded.Consequently, the chimeric reliably outer packaging housing 3 that is fixed on of resin substrate 4.
As mentioned above, because the variable resistance 1 of the present patent application can be made of rotating shaft 2, outer packaging housing 3, resin substrate 4, therefore constitute amount of parts and reduce, as mentioned above, assembling is also than being easier to.Therefore, miniaturization easily can significantly reduce production cost.
Industrial practicality
As mentioned above, the present invention is useful for variable resistance, particularly owing to reduce the formation amount of parts, reduces the number in man-hour of assembling, therefore can reduce production costs, and is in this respect more excellent.
Claims (5)
1. a variable resistance comprises: rotating shaft; Be formed with the collector body that is connected with the sliding part of the front end that is configured in described rotating shaft and the resin substrate of resistive element; And described rotating shaft rotatably kept and take in described resin substrate and have the outer packaging housing that is used for chimeric fixing opening, described variable resistance is characterised in that,
On an interarea of described resin substrate, form described collector body and described resistive element,
Integrally formed connector portion on another interarea of described resin substrate,
Described connector portion comprises: run through another interarea and bonder terminal that a plurality of pin terminals of outstanding column constitute by an interarea from described resin substrate; And outstanding surrounding the framework of described bonder terminal from another interarea of described resin substrate,
One end of described a plurality of pin terminals has an end face that interarea exposes at described resin substrate,
The described end face of the pin terminals of the part in described a plurality of pin terminals is electrically connected with described collector body,
The described end face of remaining pin terminals in described a plurality of pin terminals is electrically connected with described resistive element.
2. variable resistance as claimed in claim 1 is characterized in that, described pin terminals has the side of from one end to the other side extending, and comprises that in described side the described pin terminals of restriction is in the mobile prevention of axially movable axle portion.
3. variable resistance as claimed in claim 2 is characterized in that,
The mobile prevention of the axle portion of described pin terminals be outstanding from described side, be the continuous protuberance of radiation direction at center at axle with described pin terminals.
4. as each described variable resistance in the claim 1 to 3, it is characterized in that,
Described pin terminals has the side of from one end to the other side extending, and comprises that in described side the described pin terminals of restriction is the rotation prevention portion that the center is rotated with the axle.
5. as each described variable resistance in the claim 1 to 4, it is characterized in that,
Described resin substrate has the edge surface that extends between a described interarea and described another interarea, described edge surface has the prolongation wall that extends to described another interarea side, is formed with the holding section at described prolongation wall surface,
Engage by block base portion with the opening inwall that is formed at described outer packaging housing, described outer packaging housing and described resin substrate is chimeric fixing.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007270413 | 2007-10-17 | ||
| JP2007-270413 | 2007-10-17 | ||
| PCT/JP2008/067070 WO2009050982A1 (en) | 2007-10-17 | 2008-09-22 | Variable resistor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101821821A true CN101821821A (en) | 2010-09-01 |
Family
ID=40567255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880111288A Pending CN101821821A (en) | 2007-10-17 | 2008-09-22 | Variable resistor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2009050982A1 (en) |
| CN (1) | CN101821821A (en) |
| WO (1) | WO2009050982A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115362515A (en) * | 2020-03-30 | 2022-11-18 | 东京Cosmos电机株式会社 | Movable contact, variable resistor, and method for manufacturing movable contact |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5938598B2 (en) * | 2012-03-02 | 2016-06-22 | 株式会社テージーケー | Motor actuator |
| JP6244924B2 (en) * | 2014-01-14 | 2017-12-13 | 三菱電機株式会社 | Base, lighting lamp and lighting device |
| JP7396529B1 (en) | 2023-07-19 | 2023-12-12 | Smk株式会社 | Rear case for in-vehicle camera and case for in-vehicle camera |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643586U (en) * | 1979-08-17 | 1981-04-20 | ||
| JPS6398139A (en) * | 1986-10-15 | 1988-04-28 | Matsushita Electric Works Ltd | Manufacture of pin grid array |
| JPS6439052A (en) * | 1987-08-05 | 1989-02-09 | Matsushita Electric Works Ltd | Pin grid array |
| JPH0572056U (en) * | 1992-02-28 | 1993-09-28 | 日本電気株式会社 | connector |
| JPH0668927A (en) * | 1992-08-21 | 1994-03-11 | Nec Tohoku Ltd | Structure for locking connector terminal |
| JPH08153608A (en) * | 1994-09-30 | 1996-06-11 | Aisin Seiki Co Ltd | Variable resistor |
| JPH0917618A (en) * | 1995-06-29 | 1997-01-17 | Aisin Seiki Co Ltd | Manufacture of resistance film base |
| JP2003109808A (en) * | 2001-09-28 | 2003-04-11 | Murata Mfg Co Ltd | Varistor |
| JP4364135B2 (en) * | 2005-02-07 | 2009-11-11 | 矢崎総業株式会社 | How to assemble a joint connector |
-
2008
- 2008-09-22 CN CN200880111288A patent/CN101821821A/en active Pending
- 2008-09-22 JP JP2009538018A patent/JPWO2009050982A1/en active Pending
- 2008-09-22 WO PCT/JP2008/067070 patent/WO2009050982A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115362515A (en) * | 2020-03-30 | 2022-11-18 | 东京Cosmos电机株式会社 | Movable contact, variable resistor, and method for manufacturing movable contact |
| CN115362515B (en) * | 2020-03-30 | 2024-01-09 | 东京Cosmos电机株式会社 | Movable contact, variable resistor, and method for manufacturing movable contact |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2009050982A1 (en) | 2011-03-03 |
| WO2009050982A1 (en) | 2009-04-23 |
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Application publication date: 20100901 |