CN101893450B - Position detection apparatus - Google Patents
Position detection apparatus Download PDFInfo
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- CN101893450B CN101893450B CN 201010223936 CN201010223936A CN101893450B CN 101893450 B CN101893450 B CN 101893450B CN 201010223936 CN201010223936 CN 201010223936 CN 201010223936 A CN201010223936 A CN 201010223936A CN 101893450 B CN101893450 B CN 101893450B
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- sliding
- resistive element
- contact portion
- sliding part
- motion track
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Abstract
The present invention provides a position detection apparatus, capable of restraining position partial difference and worsening contact of a slide position due to wear abrasion of a contact part, and improving position detection precision. The apparatus is provided with a resistor substrate (7) with a resistor pattern (71); a sliding part (57) sliding on the resistor pattern (71) to change the resistance of the resistor pattern (71); a rotary body (6) for holding the sliding part (57) to move relative to an insulated substrate (7), wherein the sliding part (57) may be swingingly supported on the rotary body (6) by using a stand position (82) on one side of the insulated substrate (7) as a fulcrum, and is provided with a contact part (83) contacting with the resistor pattern (71) on a sliding end (81), and the contact part (83) is inclined toward the stand position (82) from a middle part in an extending direction of the contact part relative to a direction vertical to the resistor substrate (7).
Description
Technical field
The present invention relates to position detecting device, relate in particular to the position detecting device that is used for angular transducer and Linear displacement transducer etc.
Background technology
In the prior art, as the middle position detecting devices that use such as angular transducer, the known device (for example with reference to patent documentation 1) that has utilization to detect the anglec of rotation along with the variable output voltage of the rotation of rotary body.This position detecting device has the resistive element substrate that is formed with roughly c-shaped resistive element pattern and is fixed on the end face of rotary body and the sliding part that on the resistive element pattern, slides.Sliding part is a fulcrum with the set-up positions of leaning on the resistive element substrate-side to hold up from rotary body, and sliding end (free end) is depicted circular-arc motion track, and cantilever remains on the rotary body swingably.
At this moment, the contact portion of the distolateral formation of slip of sliding part divides with respect to tilting with the direction of the resistive element substrate quadrature opposition side towards set-up positions from the middle part of bearing of trend, tilts to contact with the resistive element pattern.And according to the sliding position of the sliding end of resistive element pattern and sliding part, the resistance value of resistive element pattern is variable, through obtaining the variable corresponding output voltage with this resistance value, thereby detects the anglec of rotation of rotary body.
Patent documentation 1: TOHKEMY 2002-39789 communique
Yet; In the position detecting device of above-mentioned prior art, there is such problem; Because contact portion is with respect to tilting with the direction of the resistive element substrate quadrature opposition side towards set-up positions, so because of the wearing and tearing of contact portion produce deviation at sliding position, accuracy of detection reduces.Particularly, shown in Fig. 8 (a),, then just produce position deviation at the sliding position of distance L if contact portion 92 produces wearing and tearing.
In addition, in the position detecting device of prior art, also have such problem, because the fine concavo-convex slip of resistive element patterned surfaces, sliding part produces deflection, the contact variation of contact portion and resistive element pattern and cause the accuracy of detection reduction.Particularly, shown in Fig. 8 (b), break away when moving to toppling over of contact portion 92 at sliding part 91, contact portion strengthens along with resistive element patterned surfaces micro concavo-convex and on sliding part 91, produces deflection.
Summary of the invention
The present invention proposes in view of said problem, and its purpose is to provide a kind of can suppress the position deviation of sliding position and the problem that contact worsens, and can improve the position detecting device of position detection accuracy.
Position detecting device of the present invention has: the resistive element substrate that is formed with the resistive element pattern; On said resistive element pattern, slide, make the variable sliding part of resistance value of said resistive element pattern; Keep said sliding part; And the holding member that it can be relatively moved with respect to said resistive element substrate; Said sliding part is that fulcrum can swingingly remain on the said holding member to erect in the set-up positions of said resistive element substrate-side; And in the distolateral contact portion that contacts with said resistive element pattern that has of sliding, this contact portion divides with respect to fall towards said set-up positions inclination with the direction of said resistive element substrate quadrature from the middle part of bearing of trend.
According to this structure, the contact portion of sliding part is sliding distolateral owing to divide with respect to fall towards the set-up positions inclination with the direction of resistive element substrate quadrature from the bearing of trend middle part, so can reduce the position deviation that the wearing and tearing because of contact portion produce at sliding position.For example, the circular-arc roughly motion track that contact portion is depicted along the sliding end through swing forms, thereby can reduce the position deviation of sliding position.Even the toppling over of sliding part portion in the contact breaks away when moving, be enhanced with respect to the fine concavo-convex butt rigidity of resistive element patterned surfaces, the flexible of sliding part reduces, and contact is improved.Thereby the position deviation of sliding position and contact deterioration are inhibited, and position detection accuracy is improved.
In addition, the above rheme detection device of the present invention is the basis, it is characterized in that, the circular-arc motion track that said contact portion depicts along the said sliding end through swing forms.
According to this structure, move on motion track because sliding end is corresponding with the wearing and tearing of contact portion, so can make that the position deviation of sliding position is minimum.
In addition, the above rheme detection device of the present invention is the basis, it is characterized in that, said contact portion forms 2 linearity on the binding circular-arc motion track that said sliding end is depicted through swing.
According to this structure, move on motion track roughly because sliding end is corresponding with the wearing and tearing of contact portion, so can make that the position deviation of sliding position is minimum.In addition, because contact portion shape linearly, so processing becomes easy.
In addition, the above rheme detection device of the present invention is the basis, it is characterized in that said sliding part at least a portion forms with respect to said resistive element substrate abreast.
According to this structure, moving even sliding part breaks away at toppling over of sliding end, owing to the rigidity of sliding part with respect to swaying direction is enhanced, so flexible will further reducing, contact is improved.
The invention effect
According to the present invention, owing to the wearing and tearing of contact portion cause the position deviation of sliding position and the deterioration of contact to be inhibited, thereby position detection accuracy is improved.
Description of drawings
Fig. 1 is the figure that the embodiment of position detecting device of the present invention is shown, and is the stereographic map of rotary-type sensor.
Fig. 2 is the figure that the embodiment of position detecting device of the present invention is shown, for take the stereographic map of cover apart from rotary-type sensor.
Fig. 3 is the figure that the embodiment of position detecting device of the present invention is shown, and is the sectional view of rotary-type sensor.
Fig. 4 is the figure that the embodiment of position detecting device of the present invention is shown, and is the stereographic map of state that slide unit is installed on the rotary body.
Fig. 5 is the figure that the embodiment of position detecting device of the present invention is shown, and is the schematic top plan view of insulated substrate and slide unit.
Fig. 6 is the figure that the embodiment of position detecting device of the present invention is shown, and is the key diagram of the sliding mode of insulated substrate and sliding part.
Fig. 7 is the figure that the embodiment of position detecting device of the present invention is shown, and is the partial enlarged drawing of sliding part.
Fig. 8 is the figure that the prior art example of position detecting device of the present invention is shown.
Description of reference numerals
1 rotary-type sensor (position-measurement device)
4 housings
5 covers
6 rotary bodies (holding member)
7 insulated substrates (resistive element substrate)
35 round plates
37 circular protrusions
45 slide units
51 wire projections
52 circular projections
53 spline protuberances
54 locator protrusionss
56 baseplate parts
57a, 57b sliding part
71 resistive element patterns
72 collector body patterns
81 sliding ends
82 set-up positions
83 contact portions
84 parallel portion
85 contact portions
The T motion track
Embodiment
Below, with reference to accompanying drawing embodiment of the present invention is elaborated.Fig. 1 is the stereographic map of this embodiment rotary-type sensor.Fig. 2 is for pulling down the stereographic map of cover from this embodiment rotary-type sensor.Fig. 3 is the sectional view of this embodiment rotary-type sensor.In addition, below, go up on the turning axle of the throttle valve sensor of carrying to the present invention being installed on automobile for example etc., carry out the situation that rotary-type sensor was suitable for that valve opening detects and describe.Yet, to this embodiment position detecting device applicable object, be not limited only to this, can carry out suitable change.
To shown in Figure 3, rotary-type sensor 1 has framework 2 like Fig. 1, in framework 2, contains the rotary body 6 with turning axle 3 rotations, and detects the insulated substrate 7 of the anglec of rotation of turning axle 3 with rotary body 6.Framework 2 is by the housing 4 that disposes rotary body 6 and insulated substrate 7 and will constitute with the peristome 11 inaccessible covers 5 of the turning axle 3 side opposition sides of housing 4.In addition, drive as the turning axle 3 and the throttling valve interlock of the detected object of rotary-type sensor 1, the insertion portion cross section of inserting rotary body 6 forms oblong-shaped.
In substrate resettlement section 17,, insulated substrate 7 is directed to the installation site through these a plurality of guiding protuberances 19 upwards separating certain intervals week from a plurality of guiding protuberances 19 of the outstanding formation of inner peripheral surface.In addition, in terminal accommodating portion 18, form 3 22,3 mounting grooves 22 of mounting groove that are used to install 3 splicing ears 21 and be positioned at position with respect to the Width almost parallel of cylindrical portion 13.Form fixed orifice 23 respectively on a pair of fixed part 14, pass the binding parts in this fixed orifice 23, rotary-type sensor 1 is fixed in the regulation position of engine.
In the next door 24 that separates surrounding wall portion 12 and cylindrical portion 13, bury 3 outside terminals 25 underground, each outside terminal 25 respectively corresponding 3 splicing ear 21.In addition, each outside terminal 25 1 distolateral pin shape that form, another is distolateral form tabular, distolateral protruding in the cylindrical portion 13, and another is distolateral to expose in mounting groove 22 and be connected with splicing ear 21.
Insulated substrate 7 forms roughly discoid through insulating resin, form the collector body pattern 72 (referring to Fig. 5) that resistive element pattern 71 and good electric conductor form at the lower surface with the peristome 11 side opposition sides of housing 4.In addition, for resistive element pattern 71 and collector body pattern 72, the sliding part 57 of being located at rotary body 6 can slide, and resistance value can corresponding change with the sliding position of sliding part 57.In addition, will narrate in the back about the detailed structure of insulated substrate 7 and sliding part 57.
Each splicing ear 21 forms through crooked rubber-like strip metal plate, and to have the viewed of inserting in the mounting groove 22 be the insertion section 31 of U-shaped, link to each other with an end of insertion section 31 and link to each other with the elastic contact part 32 of another tabular distolateral Elastic Contact of outside terminal 25, with the other end of insertion section 31 and the clamping part 33 of resilient clamp insulated substrate 7.Clamping part 33 contacts with collector body pattern 72 with resistive element pattern 71 on being formed at insulated substrate 7 with the state of clamping insulated substrate 7, but resistive element pattern 71 is connected with each outside terminal 25 with collector body pattern 72 conductings ground.
In circular protrusions 37, form coniform connecting hole 42, this connecting hole 42 from cover 5 be coniform outstanding maintaining part 27 and engage, thus, rotary body 6 is rotatably supported in and covers on 5.44 pairs of covers of check washer, the 5 side application of forces of the stage portion of the lower surface of turning axle 3 sides of round plate 35 through being located at turning axle insertion section 16, through the application of force of this check washer 44, the connecting hole 42 of circular protrusions 37 and the combination of maintaining part 27 are strengthened.In addition, at the insulated substrate 7 side upper surfaces of round plate 35, to be provided with slide unit 45 with the opposed mode of the lower surface of insulated substrate 7.
At this,, the detailed structure of slide unit is described with reference to Fig. 4.Fig. 4 illustrates the stereographic map that the state of slide unit is installed on the embodiment of the present invention rotary body.
As shown in Figure 4; Illustrated the place ahead in circular protrusions 37; The wire projection that is used for hot riveting 51 that is positioned at outer circumferential side be positioned at a pair of circular projection 52 that is used for hot riveting of leaning on circular protrusions 37 sides than wire projection 51, from the upper surface of round plate 35 to insulated substrate 7 side-prominent formation.In addition; Outer peripheral face in circular protrusions 37; At the diagram one side-prominent spline protuberance 53 that is formed with, with respect to this spline protuberance 53 across opposed position place, the center of circular protrusions 37, locator protrusions 54 from the upper surface of round plate 35 to insulated substrate 7 side-prominent formation.
Fixedly be formed with a pair of through hole 67 that the notch that engages with wire projection 51 66 and a pair of circular projection 52 are passed in the board 61.Board 62 is formed with the pilot hole 68 that locator protrusions 54 passes in the location, is formed with the notch 69 that engages with spline protuberance 53 at spline board 63.Baseplate part 56 passes pilot hole 68 through locator protrusions 54; And spline protuberance 53 is sticked in notch 69 and is positioned at the upper surface of round plate 35 all around, is fixed on the upper surface of round plate 35 with the mode of wire projection 51 and a pair of circular projection 52 hot rivetings.
In addition; Be provided with a pair of sliding part that extends from two side direction sides at fixing board 61 and keep board 64; Keep board 64 at a sliding part; The sliding part 57a that cantilever maintenance swingably contacts with resistive element pattern 71 keeps board 64 at another sliding part, the sliding part 57b that cantilever maintenance swingably contacts with collector body pattern 72.Sliding part 57a, 57b are formed by the conductive metal plate, erect in insulated substrate 7 sides, and, in sliding end 81 sides, turn back a little to set-up positions 82 sides.In addition, sliding part 57a, 57b are cut into three strands from the part midway of bearing of trend to sliding end 81 sides, improve the contact of resistive element pattern 71 and collector body pattern 72.
With reference to Fig. 5, the structure of the output voltage of the anglec of rotation of obtaining the corresponding rotation axle is described.Fig. 5 is the schematic top plan view of the insulated substrate and the slide unit of embodiment of the present invention.
The lower surface of rotary body 6 sides of insulated substrate 7 is formed with circular-arc resistive element pattern 71 and with respect to the peristome 77 opposed circular-arc collector body patterns 72 of resistive element pattern 71 across central authorities.On one end and the other end of resistive element pattern 71, extend to be provided with respectively and draw pattern 73,74, draw pattern 73, apply constant voltage between 74 to this.In addition, extend to be provided with at collector body pattern 72 and draw pattern 75, obtain at 71 output voltages of resistive element pattern by slide unit 45 dividing potential drops through drawing pattern 75.
In other words, insulated substrate 7 plays a role as so-called variable resistor body with slide unit 45, utilizes the sliding position of the sliding part 57a on the resistive element pattern 71, makes that intrinsic standoff ratio (resistance value) is variable and output voltage changes.In the variohm that so constitutes, via rotary body 6 sliding part 57a is slided through the rotation of turning axle 3 on resistive element pattern 71, thus, resistance value is variable and obtain the output voltage corresponding with the anglec of rotation of turning axle 3.
With reference to Fig. 6 the insulated substrate of characteristic of the present invention and the sliding mode of sliding part are described.Fig. 6 is the key diagram of sliding mode of insulated substrate and the sliding part of embodiment of the present invention.Fig. 7 is the partial enlarged drawing of the sliding part of embodiment of the present invention.Simultaneously, because pair of sliders has identical structure, only describe to one of them.
Shown in Fig. 6 (a), because sliding part 57 is by the maintenance of baseplate part 56 cantilevers, so under the situation of sliding part 57 swings, it is fulcrum that sliding end 81 constitutes with set-up positions 82, depicts circular-arc motion track T.In addition, sliding end 81 sides of sliding part 57 form from the middle part of bearing of trend divide with respect to the direction of insulated substrate 7 quadratures contact portion 83 towards set-up positions 82 tilt.More specifically, shown in Fig. 7 (a), 2 C such as center line such as branch such as grade that contact portion 83 forms the thickness of slab direction link 2 linearities that point forms on the motion track T of sliding end 81.In addition, be formed with the parallel portion 84 that is parallel to insulated substrate 7 at the center section that links to each other with the contact portion 83 of sliding part 57.
And by the A-stage of the sliding part 57 shown in Fig. 6 (a), contact portion 83 rubs owing to sliding with resistive element pattern 71, and the sliding part 57 shown in Fig. 6 (b) produces wearing and tearing, in insulated substrate 7 side oscillations.At this moment, because contact portion 83 forms the linearity of 2 points that link motion track T, so 81 of sliding ends are roughly moving on the motion track T in the wear range of contact portion 83.So, although contact portion 83 wearing and tearing since from the set-up positions 82 of sliding part 57 to sliding end 81 apart from almost fixed, thereby the position deviation of the sliding position in the resistive element pattern 71 diminishes.
Like this; Compare and use contact portion to form from the part midway of bearing of trend to the rotary-type sensor (with reference to Fig. 8 (a)) with respect to the sliding part of the comparative example that tilts towards the opposition side of set-up positions with the direction of insulated substrate quadrature, the position deviation amount of the rotary-type sensor 1 of this embodiment relatively example descends about below 20%.
In addition, when sliding part 57 slides to the inclined side of contact portion 83, be enhanced the attitude stabilization of sliding part 57 with respect to resistive element pattern 71 surperficial fine concavo-convex butt rigidity.Here; Owing to be formed with the parallel portion 84 that is parallel to insulated substrate 7 in the sliding part 57; Therefore can reduce from set-up positions 82 to parallel portion that 84 arm length shortens and flexible when swinging; Make the arm stable posture between set-up positions 82 and the parallel portion 84, thereby make the stable posture that contacts of contact portion 83 and resistive element pattern 71.
Thus; Rotary-type sensor 1 according to this embodiment; The contact portion 83 of sliding part 57 forms the linearity that connects 2 points on the circular-arc motion track of describing owing to sliding end 81 swings, thus, can reduce the position deviation of contact portion 83 in abrasion condition lower slider position.In addition, when the inclined side of contact portion 83 was slided, owing to be enhanced with respect to the fine concavo-convex butt rigidity on resistive element pattern 71 surfaces, the posture of sliding part 57 was also stablized, and can improve contact at sliding part 57.Thereby, the position deviation of sliding position and the deterioration of contact are inhibited, improve position detection accuracy.
In addition, in this embodiment, 2 center lines such as branch such as grade that contact portion forms the thickness of slab direction link the structure of the linearity of 2 points on the motion track of sliding end, but are not limited to this structure.Contact portion forms and comprises the form that links 2 straight line on the motion track and get final product, and unqualified be the identical structure of straight line of 2 points on the motion track of 2 center lines such as branch such as grade and binding sliding end of thickness of slab direction of contact portion.
In addition, the contact portion in the embodiment of the present invention forms the structure of linearity, but unqualified in this structure.Irrelevant with the wearing and tearing of contact portion; Distance from the set-up positions of sliding part to sliding end can almost fixed structure get final product; For example, shown in Fig. 7 (b), through being the shape of contact portion 85 along motion track T; The displacement of the distance from the set-up positions to the sliding end that wearing and tearing feasible and contact portion 85 have nothing to do is minimum, thereby the position deviation amount of sliding position is minimized.In addition, at this, unqualified is that the motion track T of 2 branch center lines such as grade and sliding end of thickness of slab direction of contact portion 85 is in full accord.
In addition, although in this embodiment, the corresponding formation of motion track of contact portion and sliding end not only is defined in this structure.Contact portion forms from the middle part branch of the bearing of trend of sliding part with respect to getting final product with the direction of the insulated substrate quadrature structure towards the set-up positions tilt.Even adopt this structure,, also can reduce the position deviation of sliding position although contact portion does not form consistently with the motion track of sliding end.
In addition, in this embodiment, the structure that the present invention is applicable to rotary-type sensor is described, but be not limited to this structure.Also can be so long as can detect the structure of the displacement of object, for example also can the present invention be applicable in the linear stroke sensor etc. of the displacement on the detection of straight lines direction with electric mode.
In addition, although in the embodiment of the present invention, the center section that links to each other with contact portion is the structure with the parallel portion that is parallel to insulated substrate, is not limited to this structure.The structure that sliding part does not have parallel portion is also passable, when sliding part has parallel portion, and the also position of unqualified parallel portion and quantity.
In addition, this time disclosed embodiment is exemplary all, and the present invention is not limited only in these embodiments.Scope of the present invention is not limited among the explanation of being undertaken by above-mentioned embodiment, but is represented by claims, and the institute that within aim that is equal to claims and scope, has done changes and all should be contained in wherein.
Commercial viability
As described above; The present invention has that the position deviation that can suppress the sliding position that contact portion wearing and tearing bring worsens with contact, the effect of raising position detection accuracy, and is particularly useful to the position detecting device that is used for angular transducer and linear displacement transducer etc.
Claims (1)
1. position detecting device is characterized in that having:
Be formed with the resistive element substrate of resistive element pattern;
On said resistive element pattern, slide, make the variable sliding part of resistance value of said resistive element pattern;
Keep said sliding part, and make its holding member that can relatively move with respect to said resistive element substrate,
Said sliding part is that fulcrum can swingingly remain on the said holding member to erect in the set-up positions of said resistive element substrate-side; And in the distolateral contact portion that contacts with said resistive element pattern that has of sliding; This contact portion divides with respect to fall towards said set-up positions inclination with the direction of said resistive element substrate quadrature from the middle part of bearing of trend; The circular-arc motion track that said contact portion depicts along the said sliding end through the swing of said sliding part forms; Said sliding end moves on motion track corresponding to the wearing and tearing of said contact portion; Perhaps said contact portion forms 2 linearity on the binding circular-arc motion track that said sliding end is depicted through the swing of said sliding part; Said sliding end roughly moves on motion track corresponding to the wearing and tearing of said contact portion, and under the state, the center section that is connected with the contact portion of said sliding part is formed with the parallel portion that is parallel to the resistive element substrate in the early stage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009105863A JP5230517B2 (en) | 2009-04-24 | 2009-04-24 | Position detection device |
| JP2009-105863 | 2009-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101893450A CN101893450A (en) | 2010-11-24 |
| CN101893450B true CN101893450B (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010223936 Active CN101893450B (en) | 2009-04-24 | 2010-04-22 | Position detection apparatus |
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| Country | Link |
|---|---|
| JP (1) | JP5230517B2 (en) |
| CN (1) | CN101893450B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI671776B (en) * | 2017-06-08 | 2019-09-11 | 日商阿爾卑斯阿爾派股份有限公司 | Switching device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0727805B2 (en) * | 1989-12-13 | 1995-03-29 | 松下電器産業株式会社 | Linear variable resistor |
| JP2000292118A (en) * | 1999-04-12 | 2000-10-20 | Alps Electric Co Ltd | Angle of rotation sensor |
| JP3699887B2 (en) * | 2000-07-25 | 2005-09-28 | アルプス電気株式会社 | Rotation type sensor |
| JP4291014B2 (en) * | 2002-11-14 | 2009-07-08 | アルプス電気株式会社 | Rotation type sensor |
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2009
- 2009-04-24 JP JP2009105863A patent/JP5230517B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5230517B2 (en) | 2013-07-10 |
| CN101893450A (en) | 2010-11-24 |
| JP2010256147A (en) | 2010-11-11 |
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Address after: Tokyo, Japan, Japan Patentee after: Alpine Alpine Company Address before: Tokyo, Japan, Japan Patentee before: Alps Electric Co., Ltd. |