CN1120505C - Rotary electric member with grooves for regulating drive - Google Patents

Abstract

The present invention is concerned with a rotary electric component having a groove for adjustment with a screw-driver. In the rotary electric component, a rotor having a screw-driver groove and a through hole, with an electrically conductive pattern being formed on the underside thereof, is mounted rotatably on a support shaft which is inserted into the through hole.

Description

Rotary electric member

The present invention relates to be specially adapted to use rotary electric member in the semi-fixed type variable resistance, that have adjustment driver usefulness groove.

As shown in Figure 6, existing is at insulating substrate 31 places of being made by synthetic resin such as rotary electric members such as variable resistances mostly, is provided with contact chip 32, back shaft 33, by the terminal 34 of these back shaft 33 enforcement installations, and the nappe 35 that is made of metal.

The rotary body 36 that is made of synthetic resin has axial region 36a, and is provided with base portion 36c recess 36b, rounded, and also is formed with resistive element 37 and good conductor of electricity 38 below this base portion 36c.

Recess 36b place on this rotary body 36 is embedded with back shaft 33, and axial region 36a is highlighted by the 35a place, hole on the nappe 35, also disposes leaf spring 39 between base portion 36c and nappe 35.

When rotary body 36 is installed, rotary body 36 will lean on back shaft 33 and nappe 35 and keep rotatable state, contact chip 32 contacts with resistive element 37, and pushes rotary body 36 by leaf spring 39, thereby good conductor of electricity 38 is in and back shaft 33 contacted states.

When the axial region 36a of this rotary electric member in rotary body 36 rotates, rotary body 36 will be by back shaft 33 and nappe 35 guiding rotations, and good conductor of electricity 38 is in and back shaft 33 contacted states, thereby, just can implement to adjust to resistance value by the slip of resistive element 37 on contact chip 32.

Existing rotary electric member need be provided with the back shaft 33, nappe 35 and the leaf spring 39 that keep rotary body 36 usefulness, so have that parts are many, shape is bigger, cost is than problems such as higher and productivity ratio are bad.

And it need use nappe 35 and leaf spring 39, is difficult to make assembling to realize problems such as automation so also have.

And, because rotary body 36 is made by synthetic resin, produce deflection so change meeting with temperature, timeliness, thus can be to being arranged on following resistive element 37, good conductor of electricity 38 generation harmful effects, so also have the problem that is difficult to obtain the good electric component of precision.

In order to address the above problem, the invention provides a kind of electric component, it has locates to have the rotary body that drives groove, has through hole at central portion in the above, be formed on the conductive pattern that this rotary body is located below, and the support component that is supporting back shaft, and, rotatably described rotary body is implemented to install by running through the back shaft that is inserted into the through hole in the aforementioned rotary body.

And, can also be riveted on the mode that the bottom surface on the described driving groove is located by leading section with described back shaft, described rotary body is installed on the described back shaft.

And, quick nut can also be installed in the front end of described back shaft, and the place, bottom surface of this quick nut and described driving groove is connected, thereby described rotary body is installed on the described back shaft.

And, can also be formed with flat surfaces at the outside side face place of the upper side of described rotary body.

And, described support component is made by insulating material, described conductive pattern is made of good conductor of electricity and resistive element, and makes described back shaft and the contact component that slides is embedded into and is installed in described support component place on described conductive pattern.

Below with reference to accompanying drawing, with the semi-fixed type variable resistance is that example illustrates rotary electric member of the present invention, Fig. 1～Fig. 5 all is schematic diagrames of explanation rotary electric member of the present invention, wherein Fig. 1 is the front view of rotary electric member, Fig. 2 is the side view of rotary electric member, Fig. 3 is the profile of rotary electric member, Fig. 4 A is the rearview of the support component in the expression rotary electric member, Fig. 4 B is the front view of the support component in the expression rotary electric member, Fig. 5 A, Fig. 5 B is the schematic diagram of the manufacturing usefulness of explanation rotary electric member, and Fig. 6 is the profile of existing rotary electric member.

Below with reference to the variable resistance of Fig. 1～Fig. 5 explanation as rotary electric member of the present invention, wherein the support component of being made by the insulated synthetic resin material 1 has the recess 1a that is arranged on the central portion place and is arranged on the braking parts 1b that a part is located in its outside perimembranous, and also be embedded at this support component 1 place back shaft 2 that is made of metallic plate and a pair of contact component 3,4 that is made of the rubber-like metallic plate are installed, and form as one with them.

And back shaft 2 can draw processing mode to form by squeezing, and has the axial region 2d that is formed with convex shoulder 2c between large-diameter portion 2a and minor diameter 2b, and portion of terminal 2e.

A pair of contact component 3,4 has base portion 3a, 4a respectively, the contact site 3b, the 4b that are extended out by the end of base portion 3a, 4a, and the portion of terminal 3c, the 4c that are extended out by the other end of base portion 3a, 4a.

And, when back shaft 2 and a pair of contact component 3,4 are mounted to support component 1 place, earlier by state configuration back shaft 2 and contact component 3,4 shown in Fig. 5 A, and then shown in Fig. 5 B, formation is by the support component 1 of molding synthetic resin, is installed in support component 1 place thereby back shaft 2 and contact component 3,4 be embedded into.

After implementing to be embedded into installation, with back shaft 2 by the rectangular warpage of line S1 shown in Fig. 5 A, again contact component 3 is pressed the rectangular warpage of line S2, and then by line S3 be 180 the degree warpages, thereby make contact site 3b be arranged in the recess 1a of support component 1, but also contact component 4 is pressed the rectangular warpage of line S4, and then be 180 degree warpages by line S5, thus make contact site 4b also be arranged in the recess 1a of support component 1.

The rotary body of being made by ceramic material 5 has and is octagonal, the through hole 5a at portion place in the central is set, disposed thereon that locate, be criss-cross driving groove 5b, be formed on the par 5c that locates above in the mode that is holding the perimembranous place, the outside that is criss-cross driving groove 5b, and the braking parts 5d that is arranged on the sidepiece place.

And at place below this rotary body 5 also shown in Fig. 4 A, Fig. 4 B, be formed with by resistive element 6 and the conductive pattern 8 that constitutes such as the good conductor of electricity 7 of silver etc.

Described good conductor of electricity 7 has the good conductor of electricity 7a and the good conductor of electricity 7b that is formed on inboard place that clamping resistive element 6 and is formed on the outside, the good conductor of electricity 7a that is positioned at the outside is connected with an end of resistive element 6, the good conductor of electricity 7b that is positioned at inboard place is connected with the other end of resistive element 6, and makes the inside of through hole 5a and peripheral part mutual conduction of through hole 5a.

And, minor diameter 2b on the back shaft 2 runs through among the through hole 5a that is arranged on this rotary body 5, so that the leading section of the minor diameter 2b of back shaft 2 is riveted on peripheral part of the through hole 5a at the place, bottom surface that drives among the groove 5b, and then makes rotary body 5 be installed in back shaft 2 places in rotatable mode.

Owing to be to keep rotary body 5 with the bottom surface that drives groove 5b, insert the gap so can have enough big driver, be that the leading section of minor diameter 2b is implemented riveted joint in the present embodiment, implement to keep and increased in size so be no longer necessary for, and then make it be specially adapted to the thin type product, certainly, also can not implement riveted joint, but quick nut (not shown) is pressed into minor diameter 2b place, and then rotary body 5 is installed on the back shaft 2.Even in this case,, insert the gap so also can have enough big driver owing to be to keep rotary body 5 with the bottom surface that drives groove 5b.

When this rotary body 5 is in installment state, can push good conductor of electricity 7b and it is contacted with convex shoulder 2c in the back shaft 2, and the good conductor of electricity 7b that is formed in the through hole 5a is contacted with minor diameter 2b, contact site 3b in the contact component 3 is contacted with resistive element 6, the contact site 4b in the contact component 4 is contacted with the good conductor of electricity 7a that is positioned at the outside.

And for this rotary electric member, when the driving groove 5b place in rotary body 5 is inserted with driver and make rotary body 5 rotations, being positioned at inboard good conductor of electricity 7b will contact with back shaft 2, be positioned at the outside good conductor of electricity 7a will with contact component 4 sliding contacts, resistive element 6 will with contact component 3 sliding contacts, thereby can be to implementing to adjust in resistance value between portion of terminal 3c and the portion of terminal 4c and between portion of terminal 3c and portion of terminal 2e.

When the direct butt of braking parts 1b in braking parts 5d in the rotary body 5 and the support component 1, rotary body 5 stops the rotation.

When the rotary body in this rotary electric member 5 is implemented assembling, can utilize the vacuum (not shown) to attract tabular surface 5c in the rotary body 5, rotary body 5 is moved to support component 1 place always, after the back shaft 2 that will be installed in support component 1 place runs through the through hole 5a place that is inserted in the rotary body 5, leading section to back shaft 2 is implemented riveted joint, so just finish this assembling procedure, therefore can implement assembling in an automated fashion.

Rotary electric member of the present invention is to locate to form conductive pattern below, and by through the back shaft 2 that is arranged among the through hole 5a, the rotary body 5 with driving groove 5b and through hole 5a is installed rotatably.So the invention provides a kind of part count, miniaturization, cheap and rotary electric member that productivity ratio is good of reducing.

Owing to also be provided with at rotary body 5 places that form conductive pattern 8 and drive groove 5b, so the invention provides the rotary electric member that the rotation of a kind of insertion operation that can make driver and rotary body 5 is more prone to implement.

And, because the present invention is the bottom surface that the leading section of back shaft 2 is riveted on described driving groove 5b, or quick nut is installed by front end at described back shaft 2, the mode that the bottom surface of quick nut and described driving groove 5b is connected, the present invention rotary body 5 is installed in back shaft 2 places, so can also provide a kind of simple in structure, cheap rotary electric member.

And, because rotary body 5 adopts ceramic material to make,, and then can reduce influence to conductive pattern 8 so the influence that changed by temperature, timeliness is smaller, so can obtain the good electric product of precision, particularly can obtain to use the variable resistance of resistive element 6.

And, be formed with par 5c by the perimembranous place, the outside on rotary body 5, the invention provides a kind of automation rotary electric member assembling, that productivity ratio is good of realizing.

And, because support component 1 is made by insulating material, and back shaft 2 and contact component 3,4 are embedded into and are installed in support component 1 place, and then the good conductor of electricity 7 that is formed on rotary body 5 places is contacted with resistive element 6, so the present invention also provides the rotary electric member as variable resistance that a kind of building block is few, productivity ratio is good.

Claims (6)

1. rotary electric member comprises:

Rotary body has the groove that is used to insert driver above it, the central portion of this rotary body has through hole; Conductive pattern, its be formed on described rotary body below; Back shaft, it can insert in the through hole of described rotary body, rotatably keeps this rotary body; Support component is used to support described back shaft; Skate, it is supported on the described support component, and with described conductive pattern sliding contact;

Described back shaft has big major diameter part of diameter than the through hole of described rotary body and small diameter portion that can be chimeric with described through hole; Described small diameter portion is inserted in the described through hole, periphery bottom at the through hole of the described rotary body of end difference upper support of described major diameter part and small diameter portion, by to implementing riveted joint, described rotary body is installed on the described back shaft by the outstanding described small diameter portion of above-mentioned rotary body.

2. rotary electric member comprises:

Rotary body has the groove that is used to insert driver above it, the central portion of this rotary body has through hole; Conductive pattern, its be formed on described rotary body below; Back shaft, it can insert in the through hole of described rotary body, rotatably keeps this rotary body; Support component is used to support described back shaft; Skate, it is supported on the described support component, and with described conductive pattern sliding contact;

Described back shaft has big major diameter part of diameter than the through hole of described rotary body and small diameter portion that can be chimeric with described through hole; Described small diameter portion is inserted in the described through hole, periphery bottom at the through hole of the described rotary body of end difference upper support of described major diameter part and small diameter portion, by to quick nut being installed, described rotary body is installed on the described back shaft by the outstanding described small diameter portion of above-mentioned rotary body.

3. rotary electric member as claimed in claim 1 or 2 is characterized in that described rotary body is made by ceramic material.

4. rotary electric member as claimed in claim 1 or 2 is characterized in that, the outside side face place of the upper side of described rotary body is formed with flat surfaces.

5. rotary electric member as claimed in claim 1 or 2, it is characterized in that, described support component is made by insulating material, described conductive pattern is made of good conductor of electricity and resistive element, and makes described back shaft and the contact component that slides on described conductive pattern is embedded into and is installed in described support component place.

6. rotary electric member as claimed in claim 1 or 2 is characterized in that described conductive pattern has good conductor, this good conductor have and described major diameter part and small diameter portion between the contacted part of end difference.

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