CN1913050A - Rheostat - Google Patents

Abstract

A first resistor (11) and a second resistor (12) are formed in an annular shape on the substrate surface of the first insulating substrate (31) under an insulated state, and a conductor (13) is formed to an opposed surface with a first insulating substrate to a second insulating substrate (32) as separated and oppositely arranged to the first insulating substrate. The first insulating substrate or the second insulating substrate is composed of a flexible member capable of pushing and contacting the first resistor, the second resistor, and the conductor. A voltage applying section (14) is formed at a crossed section of the first resistor with a virtual line (L1) dividing the first resistor into two, and the voltage applying section (16) is formed at the crossed section with the second resistor opposed while holding the voltage applying section and the central section of the first resistor. The power consumption is not generated by applying a voltage between the voltage applying sections (14 and 16) from a voltage output section (21), and bringing the first resistor and the second resistor to a nonconductive state under a non-pushing state as a standby state.

Description

Variable resistance

Technical field

The present invention relates to a kind of being used in can be by the variable resistance of contact to the message input device of electronic-controlled installation input analog information.

Background technology

Have a kind of for contact to the desired analog information of the electronic-controlled installation of various device input, and use the message input device (for example with reference to patent documentation 1) of variable resistance.Use face contact formula variable resistance in this message input device.

Figure 10 is the structure chart of the face contact formula variable resistance described in the above-mentioned patent documentation 1.As shown in the drawing, variable resistance 100 has: the resistive element 101 of specific length, separate with this resistive element 101 and pliability short-circuit component 102 that subtend is provided with, one distolateral terminal 103 of resistive element 101 is connected another distolateral terminal 105 ground connection of resistive element 101 with the positive pole of battery 104.

As shown in figure 10, when at an arbitrary position short-circuit component 102 being surpassed when resistive element 101 is pushed, by the contact point P of corresponding pressing position, with short-circuit component 102 and resistive element 101 conductings.If establishing the total resistance value of resistive element 101 is R, the resistance value of contact point P both sides is that the direct voltage of R1, R2 (R=R1+R2), battery 104 is Vs, and then the output voltage V out of short-circuit component 102 is Vout=(Vs/R) * R2, appears at lead-out terminal 106.In example shown in Figure 10, output voltage V out is transformed into digital signal by A/D converter 107, inputs to CPU109 through input/output interface 108, is used for various controls.

[patent documentation 1] spy opens flat 6-53015 communique

But, because above-mentioned variable resistance 100, adopt between resistive element 101 two ends the formation of on-load voltage (Vs) often, therefore,, also there is this problem of resistive element 101 consumed powers even when not operation.For example, in the equipment of use battery as power supply of portable equipment terminal and so on, because the standby power of variable resistance 100 makes shorten the service time of equipment,, also wish to suppress the standby power of variable resistance 100 therefore in order to prolong the up time of portable equipment terminal.

Summary of the invention

The present invention is in view of above problem, and its purpose is to provide a kind of variable resistance of the consumed power of resistive element can suppress not operation the time.

Variable resistance of the present invention is characterized in that, has: one side becomes the front side that is performed the pressing operation side and has flexual first substrate; The one side another side of this first substrate is relatively left also second substrate of opposite disposed; Be arranged on first resistive element in the form of a ring of any one party in the one side of the another side of above-mentioned first substrate and above-mentioned second substrate; Be arranged on same real estate with above-mentioned first resistive element, and in the ring of above-mentioned first resistive element with the state of this first resistive element insulation under and second resistive element in the form of a ring that is provided with; With the opposing party arbitrarily in the one side of another side that is arranged on above-mentioned first substrate and above-mentioned second substrate, along with the pressing operation of above-mentioned first substrate, make the electric conductor of the correspondence position conducting of above-mentioned first resistive element corresponding and above-mentioned second resistive element with pressing position to front side; The part of above-mentioned first resistive element is connected with the first voltage loading part conducting, the part of above-mentioned second resistive element is connected with the second voltage loading part conducting, formation can be between above-mentioned first voltage loading part and above-mentioned second voltage loading part formation of on-load voltage.

According to above-mentioned formation, owing to constitute the first and second resistive element mutual insulatings of the resistive element of variable resistance, so, under the holding state that the front side of first substrate is not pressed, first, second resistive element keeps nonconducting state, does not produce consumed power in first and second resistive elements.On the other hand, under the user mode that the front side of first substrate is pressed, make first and second resistive elements in position conducting, obtained output voltage corresponding to pressing position corresponding to pressing position by electric conductor.

And, in above-mentioned variable resistance, above-mentioned first resistive element, the cross part in that first imaginary line with two fens these first resistive elements intersects is connected with the above-mentioned first voltage loading part conducting; Above-mentioned second resistive element, the connecting portion of above-mentioned relatively first resistive element and above-mentioned first voltage loading part, with across the central portion of above-mentioned first resistive element and near the cross part of opposed above-mentioned first imaginary line or its, be connected with the above-mentioned second voltage loading part conducting.

Thus, can carry out along the position probing of the direction of first imaginary line.And, in the position probing of the direction of first imaginary line, connecting portion from first resistive element and first voltage loading part, to from this connecting portion across the central portion of first resistive element and the scope of the connecting portion of opposed second resistive element and second voltage loading part, become the scope that can detect contact position, therefore, can guarantee long opereating specification, can change output voltage corresponding to pressing position.

And in above-mentioned variable resistance, above-mentioned first resistive element at the cross part place of second imaginary line that intersects with two fens these first resistive elements and with above-mentioned first imaginary line, is connected with tertiary voltage loading portion conducting; Above-mentioned second resistive element, the connecting portion of above-mentioned relatively first resistive element and above-mentioned tertiary voltage loading portion, with across the central portion of above-mentioned first resistive element and near the cross part of opposed above-mentioned second imaginary line or its, be connected with the 4th voltage loading part conducting; Formed between above-mentioned tertiary voltage loading portion and above-mentioned the 4th voltage loading part can on-load voltage formation.

Thus, can carry out along the position probing of the direction of first imaginary line, and, can carry out along the position probing of the direction of second imaginary line.And, in the position probing of the direction of second imaginary line, because connecting portion from first resistive element and tertiary voltage loading portion, to from this connecting portion across the central portion of first resistive element and the scope of the connecting portion of opposed second resistive element and the 4th voltage loading part, also become the scope that can detect contact position, so, can guarantee long opereating specification.

And preferred above-mentioned first imaginary line and above-mentioned second imaginary line are vertical relation.Thus, can be with corresponding to the output voltage that pressing position occurred, as by using along the direction (Y-axis) of first imaginary line and the coordinate information on the plane of direction (X-axis) regulation of second imaginary line.

And in above-mentioned variable resistance, preferred above-mentioned first and second resistive elements can contact with above-mentioned electric conductor and leave the ground opposite disposed.Thus, because first, second resistive element and the direct opposite disposed of electric conductor, so, can realize the miniaturization of variable resistance.

In addition, in above-mentioned variable resistance, it is all wideer than any one width of above-mentioned first and second resistive elements in the form of a ring that preferred above-mentioned electric conductor is configured to its width.Thus, the electric conductor of wide cut is contacted with first, second resistive element reliably, thereby can make the conducting reliably of first and second resistive elements.

In addition, the invention is characterized in that in above-mentioned variable resistance, above-mentioned first, second resistive element forms by same printing process.

Constitute according to this, can unify the resistivity of first, second resistive element, suppress the deviation of output voltage.

According to the present invention, can eliminate the waste of the consumed power under the holding state, by in portable equipment terminal etc., using, can prolong its up time.

Description of drawings

Fig. 1 is the structure chart that is connected with Electronic Control portion in the related variable resistance of an execution mode.

Fig. 2 (a) is the vertical view that the resistive element of variable resistance shown in Figure 1 forms the insulating properties substrate of side, (b) is the vertical view that the electric conductor of variable resistance shown in Figure 1 forms the insulating properties substrate of side.

Fig. 3 is the figure of the profile construction of expression variable resistance shown in Figure 1.

Fig. 4 (a) is the figure of the operating surface not user mode before of contact variable resistance in the above-mentioned execution mode of expression, (b) being the figure of the user mode of the expression operating surface that contacted variable resistance in the above-mentioned execution mode, (c) is the figure of the user mode after in the above-mentioned execution mode of expression the contact position of the operating surface of variable resistance having been slided.

Fig. 5 (a) is the circuit-mode figure of the variable resistance in the not user mode of corresponding diagram 4 (a), (b) is the circuit-mode figure of the variable resistance in the user mode of corresponding diagram 4 (b).

Fig. 6 is the equivalent circuit diagram of the circuit-mode figure shown in Fig. 5 (b).

Fig. 7 (a) is the vertical view that the resistive element in the configuration relation variation after changing between resistive element and the electric conductor forms side insulating properties substrate, (b) is the vertical view of the electric conductor in this variation.

Fig. 8 (a) is the vertical view that the resistive element of the variable resistance in the variation behind the electric conductor warpage forms side insulating properties substrate, (b) is the vertical view that electric conductor in this variation forms the insulating properties substrate of side.

Fig. 9 (a) is that resistive element is the vertical view that resistive element in the variation of rectangular shape forms the insulating properties substrate of side, (b) is the vertical view that electric conductor in this variation forms the insulating properties substrate of side.

Figure 10 is the structure chart of existing face contact formula variable resistance.

Among the figure: 1-variable resistance, 2-Electronic Control portion, 11,41,62-first resistive element, 12,42,63-second resistive element, 13,43,51, the 65-electric conductor, 14,15,16, the 17-voltage loading part, 18-voltage taking-up portion, 31, the 61-second insulating properties substrate (second substrate), 32, the 64-first insulating properties substrate (first substrate), 33-separator (spacer), 21-voltage efferent, the 22-A/D transformation component, 23-CPU portion, L1, L2-imaginary line.

Embodiment

Below, with reference to accompanying drawing, one embodiment of the present invention is elaborated.

Fig. 1 is the structural representation that is connected with the state of Electronic Control portion in the related variable resistance of expression present embodiment.

Variable resistance 1 is the resistive element that is used to obtain the output voltage corresponding with contact position, is divided into first resistive element 11 and second resistive element 12.First resistive element 11 and second resistive element 12 all form ring-type.Thereby second resistive element 12 is arranged on the annulus inboard of first resistive element 11 under the state that separately insulate from the inner periphery portion of first resistive element 11.Relative this first resistive element 11, second resistive element 12, the 3rd electric conductor 13 of ring-type forms the structure of subtends configuration.First resistive element 11 staggered two positions of about 90 degree be provided with become first, the voltage loading part 14,15 of tertiary voltage loading portion.Second resistive element 12 staggered about 90 degree two positions and with the position that the voltage loading part 14,15 of first resistive element 11 staggers, be provided with the voltage loading part 16,17 that becomes the second, the 4th voltage loading part.In this example, though voltage loading part 14～17 is set directly on the part of resistive element 11,12, voltage loading part 14～17 can also be arranged on the position of leaving resistive element 11,12, is connected through conductivity favorable conductive pattern or lead.

With reference to Fig. 2 (a) and (b) and Fig. 3, the formation of variable resistance 1 is described in more details.Fig. 2 (a) is formed in first resistive element 11 on the substrate and the vertical view of second resistive element 12, and Fig. 2 (b) is formed in the vertical view of the electric conductor 13 on the substrate.

Shown in Fig. 2 (a), on the real estate of the second insulating properties substrate 31 that becomes second substrate, be formed with first resistive element 11 and second resistive element 12.First resistive element 11 and second resistive element 12 are different circular of internal diameter, and the two is near to degree that can not short circuit, become concentric circles with the state configuration of insulation.

First resistive element 11, with linearity imaginary line L1 one side's of two fens these first resistive elements 11 cross part, be connected with voltage loading part 14 conductings.First resistive element 11 also with two fens these first resistive elements 11 and linearity imaginary line L2 one side's vertical cross part with above-mentioned imaginary line L1, be connected with voltage loading part 15 conductings.Can load assigned voltage Y-Vin to voltage loading part 14, voltage loading part 15 is loaded assigned voltage X-Vin.

Second resistive element 12 promptly across the central portion (cross part of imaginary line L1 and L2) of first resistive element 11 and the cross part of above-mentioned voltage loading part 14 opposed sides, is connected with voltage loading part 16 conductings at the cross part that intersects with above-mentioned imaginary line L1.Second resistive element 12 also at the cross part that intersects with above-mentioned imaginary line L2, promptly across the central portion of first resistive element 11 and the cross part of above-mentioned voltage loading part 15 opposed sides, is connected with voltage loading part 17 conductings.Voltage loading part 16 and voltage loading part 17 can load earthed voltage (GROUND).Here, though it is not shown, but in each voltage loading part 14～17 of the electrode part that becomes the second insulating properties substrate 31, be formed with through hole electrode respectively, each voltage loading part 14～17 respectively with a plurality of conductive pattern conductings of the another side that is arranged on the second insulated substrate 31 (not forming the face of resistive element 11,12).In addition, in the present embodiment, above-mentioned imaginary line L1, L2 all are positioned on the diameter of first, second resistive element 11,12 of halving, and the intersection point of imaginary line L1 and imaginary line L2 is positioned at the center of first, second resistive element 11,12 that is circular.

Shown in Fig. 2 (b), on the real estate of the first insulating properties substrate 32 that becomes first substrate, be formed with the circular electric conductor 13 that constitutes by good conductive material (for example silver-colored pattern).One side's of the first insulating properties substrate 32 face, promptly opposite with the face that is formed with electric conductor 13 face becomes front side.The first insulating properties substrate 32 has pliability.Apply at the front side to the first insulating properties substrate 32 under the pressed state of pressing force, electric conductor 13 is deformed to the degree of first, second resistive element 11,12 of abundant contact.In addition, under having removed the non-pressed state behind the pressing force of the front side of the first insulating properties substrate 32, electric conductor 13 can leave first, second resistive element 11,12, returns to original state.The first insulating properties substrate 32 can use flexible base, board.The end conducting of electric conductor 13 is connected with and is used for output voltage V out is fetched into the voltage taking-up portion 18 of outside conductive pattern.

Shown in Fig. 2 (a) and (b), make the external diameter of the external diameter of the electric conductor 13 that is circular and first resistive element 11 roughly the same, the internal diameter of the internal diameter of electric conductor 13 and second electric conductor 12 is roughly the same, with opposed zone, the formation of first, second resistive element 11,12 that is configured to concentric circles zone in, dispose electric conductor 13.The width of electric conductor 13 and the interval width of first, second resistive element 11,12 are made as, even the arbitrary site to the formation zone that is circular electric conductor 13 pushes from front side, in the corresponding position of first, second resistive element 11,12 corresponding with pressing position, electric conductor 13 also can almost contact conducting simultaneously.In the present embodiment, by making electric conductor 13 bigger than the width of first, second resistive element 11,12, the electric conductor 13 of wide cut is contacted reliably with first, second resistive element 11,12, thus first, second resistive element 11,12 of conducting reliably.

In addition,, will be printed with the area pressed pliability printing thin of the various demonstrations that are representative, and install or be attached on the front side of the first insulating properties substrate 32 though do not show among Fig. 3.

Fig. 3 is the figure of the side profile construction of pattern ground expression variable resistance 1.The first insulating properties substrate, the 32 relative second insulating properties substrates 31 are left and opposite disposed, make first, second resistive element 11,12 formation faces of the second insulating properties substrate 31 face mutually with the electric conductor 13 formation faces of the first insulating properties substrate 32.Be folded in the separator 33 between the second insulating properties substrate 31 and the first insulating properties substrate 32, formed and make electric conductor 13 contact the suitable space of leaving (leaving width) by compressive strain with first, second resistive element 11,12 by the first insulating properties substrate 32.The peripheral part of the second insulating properties substrate 31 and the first insulating properties substrate 32 is held parts 34 and keeps.

Here, the manufacturing process to first, second resistive element 11,12 describes.On the real estate of the second insulating properties substrate 31, be provided with and be formed with and the shape of first, second resistive element 11,12 and the web plate (mask to print) that leaves the corresponding pattern of width, screen printing resistive element material (for example carbon ink water) on this web plate, and the resistive element material heated.Thus, because first resistive element 11 and second resistive element 12 form by the resistive element material of identical component, so, can unify the electrical characteristics such as resistivity of first resistive element 11 and second resistive element 12, the deviation of inhibition output voltage V out.

Then, the Electronic Control portion 2 to the message input device side that connects above-mentioned variable resistance 1 describes.Electronic Control portion 2 has voltage efferent 21, its to the voltage loading part 14 that is connected with the part of first resistive element 11 of variable resistance 1 and with voltage loading part 16 that the part of second resistive element 12 is connected between load assigned voltage, simultaneously the voltage loading part 15 that the part with first resistive element 11 is connected in the moment different with it and with voltage loading part 17 that the part of second resistive element 12 is connected between load assigned voltage.The output voltage (Vout) that occurs in voltage taking-up portion 18 places that are connected with electric conductor 13 is transfused to the analog input terminal to A/D transformation component 22.A/D transformation component 22 is transformed into digital value with output voltage (Vout), and inputs to CPU portion 23.CPU portion 23 has the calculation function that value according to output voltage (Vout) calculates the contact position on the front side of the first insulating properties substrate 32.CPU portion 23 also has following function, that is, in order to carry out along the Y direction position probing of the direction of imaginary line L1 with along the X-direction position probing of the direction of imaginary line L2, control voltage efferent 21 carries out following voltage and loads switching controls.

In the position probing of Y direction, control, make that employed voltage loading part 15,17 becomes state of insulation in the position probing of X-direction, simultaneously, on-load voltage between the employed voltage loading part 14,16 in the position probing of Y direction.Particularly, control, the voltage loading part 14 that contacts with first resistive element 11 is loaded assigned voltage Y-Vin, simultaneously on imaginary line L1, voltage loading part 16 ground connection that will be connected with second resistive element 12 on imaginary line L1 become earthed voltage (GROUND).

In the position probing of X-direction, control, make the employed voltage loading part 14,16 of position probing of Y direction become state of insulation, simultaneously, on-load voltage between the employed voltage loading part 15,17 of the position probing of X-direction.Particularly, control, the voltage loading part 15 that contacts with first resistive element 11 is loaded assigned voltage X-Vin, simultaneously on imaginary line L2, voltage loading part 17 ground connection that will be connected with second resistive element 12 on imaginary line L2 become earthed voltage (GROUND).

Then, with reference to Fig. 4～Fig. 6, the action example under the situation of operation variable resistance 1 is described.

Fig. 4 (a) represents not user mode (comprising holding state), and the front side that is illustrated in the first insulating properties substrate 32 is pushed state before.Because the front side of the first insulating properties substrate 32 is not pressed, so electric conductor 13 is keeping the state that leaves from first, second resistive element 11,12.

Fig. 5 (a) is the circuit-mode figure in the not user mode of variable resistance 1.This circuit-mode figure is and ideograph under the corresponding voltage stress state of the position probing of the Y direction of the imaginary line L1 shown in Fig. 2 (a).Be to have: represent that the interior annular resistance of resistance components of exterior annular resistance, expression second resistive element 12 of the resistance components of first resistive element 11 and expression are with both sides' the ring resistance circuit structure in the travelling contact portion of the electric conductor 13 of the position conducting corresponding with pressing position, between conducting connecting portion that voltage loading part 14 is connected with 11 conductings of first resistive element and voltage loading part 16 and conducting connecting portion that 12 conductings of second resistive element are connected, load assigned voltage (Y-Vin-GROUND).At this moment, the position probing of X-direction for there not being on-load voltage, is in the state of electric insulation with voltage loading part 15,17.

At this not under the user mode, electric conductor 13 is in not and first electric conductor 11 and second electric conductor, 12 both sides' state of contact.Because first resistive element 11 and second resistive element 12 leave and insulate, so be in nonconducting state.Therefore, even with the conducting connecting portion of the voltage loading part 14 that becomes Y direction one end of first resistive element 11, and and the conducting connecting portion of the voltage loading part 16 of the other end that becomes Y direction of second resistive element 12 between on-load voltage, under user mode not, also be among first resistive element 11 and resistive element 12 both sides all the not state of circulating current, do not produce power consumption in first resistive element 11 and second resistive element 12.

The user mode of Fig. 4 (b) expression variable resistance 1 is represented the state that the front side of the first insulating properties substrate 32 is pressed.The first insulating properties substrate 32 is out of shape to the second insulating properties substrate, 31 sides at the pressing position place of front side, and the electric conductor 13 that is formed on this first insulating properties substrate 32 contacts with first, second resistive element 11,12 at pressing position.

Fig. 5 (b) is the user mode of variable resistance 1, is the circuit-mode figure under the pressed state that is pressed of area pressed.As the exterior annular resistance of first resistive element 11 and interior annular resistance, in the position corresponding, via travelling contact portion conducting as electric conductor 13 with pressing position as second resistive element 12.If be R1, be R2 to the resistance value of voltage loading part 14 clockwise to the resistance values of pressing position clockwise from this pressing position of first resistive element 11 from the voltage loading part 14 of first resistive element 11.And, establish from the pressing position of second resistive element 12 and be R3, be R4 to the resistance values of pressing position clockwise to the resistance value of voltage loading part 16 clockwise from the voltage loading part 16 of second resistive element 12.Fig. 6 is the equivalent circuit diagram of the variable resistance 1 under the pressed state shown in Fig. 5 (b).As shown in Figure 6, form first parallel circuits that first resistive element 11 (exterior annular resistance) is made of resistance R 1 and resistance R 2, second parallel circuits that second resistive element 12 (interior annular resistance) is made of resistance R 3 and resistance R 4, and formed the series circuit of be connected in series first parallel circuits and second parallel circuits.At first parallel circuits of the voltage taking-up portion 18 that becomes electric conductor 13 and the contact place of second parallel circuits, output voltage V out appears.In equivalent electric circuit shown in Figure 6, the value of output voltage V out is the value that is determined by assigned voltage (Y-Vin-GROUND) and resistance value R1, R2, R3, R4 as on-load voltage, and resistance value R1, R2, R3, R4 change according to pressing position.That is, be pressed, then detect the output voltage V out of expression and this pressing position corresponding voltage value if be the optional position of circular area pressed.Output voltage V out is transformed into digital signal by A/D transformation component 22, exports to CPU23.

Shown in Fig. 4 (c), along with the finger along operating area with circular-arc slip, change pressing position, the conduction position with electric conductor 13 of first resistive element 11 and second resistive element 12 changes.That is, the variation of the pressing position that causes corresponding to the slip of finger, the travelling contact portion 13 shown in Fig. 5 (b) can produce and move.Be accompanied by moving of the conduction position that caused by travelling contact portion 13, resistance value R1, R2, R3, R4 can change, and the output voltage V out that is determined by resistance value R1, R2, R3, R4 changes.If make pressing position load end (voltage loading part 14) to the slip of the voltage loading end (voltage loading part 16) of the Y direction of second resistive element 12 that deviates from 180 degree from the voltage of the Y direction of first resistive element 11, then output voltage V out can vary continuously to GROUND voltage (0 volt) from assigned voltage Y-Vin.

In the present embodiment, because in first resistive element 11 and contact voltage loading part 14 and second resistive element 12 and contact voltage loading part 16, across the central part of first resistive element 11 and opposite disposed, so the opereating specification that can be used in the Y direction position probing is the longest.

Above explanation, be via voltage loading part 14,16, the voltage that loads the Y direction of the end (voltage loading part 14) and second resistive element 12 at the voltage of the Y direction of first resistive element 11 loads between the end (voltage loading part 16) effect during loading assigned voltage (Y-Vin-GROUND).Like this, by with voltage loading part 14,16 that the Y direction both ends conducting of the resistive element (first resistive element 11, second resistive element 12) of variable resistance 1 is connected between, load assigned voltage (Y-Vin-GROUND), can detect pressing position (Y coordinate) by output voltage V out along the Y direction of imaginary line L1.

After voltage efferent 21 has carried out the position probing of Y direction, the position probing direction is switched to X-direction from Y direction.Therefore, stop voltage that voltage to the Y direction of first resistive element 11 loads end (voltage loading part 14) and the Y direction of second resistive element 12 and load voltage loading between the end (voltage loading part 16), the position probing of Y direction is disconnected from mains side and ground connection side with voltage loading part 14,16, be controlled to be the state of electric insulation.Then, between the position probing of X-direction is with voltage loading part 15,17, load assigned voltage (X-Vin-GROUND).Via voltage loading part 15,17, the voltage that loads end (voltage loading part 15) and the X-direction of second resistive element 12 at the voltage of the X-direction of first resistive element 11 loads between the end (voltage loading part 17) loading assigned voltage (X-Vin-GROUND).

Under this voltage stress state, when the optional position of the area pressed of variable resistance 1 is pressed, the first insulating properties substrate 32 is out of shape to the second insulating properties substrate, 31 sides at the pressing position place, electric conductor 13 contacts with first, second resistive element 11,12, makes win resistive element 11 and second resistive element 12 in the position conducting corresponding with pressing position.The result, under the voltage stress state of X-direction, also with Fig. 5 (b), circuit-mode figure and equivalent electric circuit shown in Figure 6 are the same, by voltage loading part 15 clockwise resistance value R1 to pressing position from first resistive element 11, from this pressing position of first resistive element 11 clockwise to the resistance value R2 of voltage loading part 15, from the pressing position of second resistive element 12 clockwise to the resistance value R3 of voltage loading part 17, and from the voltage loading part 17 of second resistive element 12 clockwise to the output voltage V out that resistance value R4 determined of pressing position, can appear at voltage taking-up portion 18 places of electric conductor 13.Obtain output voltage V out by CPU portion 23 via A/D transformation component 22, can detect pressing position (X coordinate) along the X-direction of imaginary line L2.

In the present embodiment, from CPU portion 23 to voltage efferent 21 input timing signals, with the regulation cycle alternately switch the voltage stress state of above-mentioned Y direction and the voltage stress state of X-direction.CPU portion 23 loads constantly at the voltage of Y direction, obtains output voltage V out as the Y coordinate; Voltage in X-direction loads constantly, obtains output voltage V out as the X coordinate.Then, by (X, Y) coordinate is determined the pressing position in the XY plane.When the operation input that is circular-arc track along circular area pressed, can detect circular-arc simulated operation amount and direction of operating by (X, Y) coordinate.

Like this, according to present embodiment, owing in variable resistance 1, contact position is transformed into the resistive element of output voltage, be divided into a plurality of resistive elements and separate the width of regulation and establish, only when operation, make this divided resistive element conducting, output voltage appears, so, can eliminate the consumed power that causes by resistive element under the holding state.Therefore, if will adopt the message input device of such variable resistance 1 to be applied in the portable equipment terminal, then can prolong the service time of portable equipment terminal.

And, according to present embodiment, owing to make second resistive element 12 inner peripheral near first resistive element 11 in the scope that is not short-circuited, and opposite disposed electric conductor 13, make itself and first, second resistive element 11,12 directly opposed, so, compare with first, second resistive element 11,12 discord electric conductors 13 opposed configurations, can make variable resistance 1 miniaturization.

In addition, according to present embodiment, because mutually perpendicular imaginary line L1, imaginary line L2 are provided with the tie point with voltage loading part 14～17, so, but on the output voltage V out former state ground expression XY plane (X, Y) coordinate can make the processing in the CPU portion 23 more or less freely.

The present invention is not limited in an above-mentioned execution mode, can also carry out various changes in the scope that does not break away from purport of the present invention.

For example, in the above-mentioned execution mode, in becoming the first insulating properties substrate 32, formed electric conductor 13 with flexual first substrate, but, also can be in the first insulating properties substrate 32, to form first, second resistive element 11,12, in the second insulating properties substrate 31, form the formation of electric conductor 13.When adopting the situation of this formation, under pressed state, first, second resistive element 11,12 contacts with electric conductor 13 to electric conductor 13 side displacements, and action effect in addition is all identical with above-mentioned execution mode.

And, in the above-mentioned execution mode, on mutually perpendicular imaginary line L1 and imaginary line L2, be provided with the tie point that is connected with voltage loading part 14～17 conductings, but, even will and a side voltage loading part between tie point be arranged on place beyond the imaginary line, also can detect the position of Y direction and X-direction.

If be the position probing of Y direction, then do not need the position probing voltage loading part 15,17 of X-direction; If be the position probing of X-direction, then do not need the position probing voltage loading part 14,16 of Y direction.

In addition, in the above-described embodiment, make first, second resistive element 11,12 and electric conductor 13 directly opposed, but not necessarily will allow both sides opposed, also can make first, second resistive element 11,12 in the pressing position conducting.

Fig. 7 represents the not figure of the variation of opposed formation of first, second resistive element and electric conductor.Shown in Fig. 7 (a), on the real estate of the second insulating properties substrate 31, form the first circular resistive element 41, side is left Rack and is formed the second circular resistive element 42 within it.Though the real estate opposite disposed of the circular electric conductor 43 shown in Fig. 7 (b) and the second insulating properties substrate 31 is made as poor less than between the external diameter of the internal diameter of first resistive element 41 and second resistive element 42 with the width of circular electric conductor 43.That is, resistive element 43 is arranged between first resistive element 41 and second resistive element 42.Shown in Fig. 7 (a), formed the conductivity broach 44 that extends to second resistive element 42 from the inner periphery portion of first resistive element 41, and formed the conductivity broach 45 that extends to first resistive element 41 from the peripheral edge portion of second resistive element 42.Mode with both sides' broach 44,45 mutual interlocks disposes first resistive element 41 and second resistive element 42.Electric conductor 43 can contact with the formation zone of engaged broach 44,45 and leave the ground opposite disposed, and the zone corresponding with the formation zone of electric conductor 43 becomes area pressed.Thus, the broach 44 of first electric conductor 41 and the broach 45 of second electric conductor 42 via electric conductor 43 in the position conducting corresponding, via broach 44,45, the first resistive elements 41 and 42 conductings of second resistive element of this conducting state with pressing position.The connecting portion of the broach 44 of first resistive element 41 and conducting state, become and Fig. 5 (b) shown in travelling contact portion 13 between conduction position, the connecting portion of second resistive element 42 and the broach 45 of conducting state, become and Fig. 5 (b) shown in travelling contact portion 13 between conduction position.With the corresponding output voltage V out of conduction position of first, second resistive element 41,42, from voltage taking-up portion 18 taking-ups of electric conductor 43.

Like this, even first, second resistive element 41,42 not with electric conductor 43 direct opposed configurations, also can access output voltage V out corresponding to pressing position, when existing the both sides can't opposite disposed or preferably not during the restriction of opposite disposed, also can be corresponding.

And the shape of electric conductor 13 is even under first, second resistive element 11,12 is circular situation, also need not be circular.Under the situation that area pressed is pressed,, then how can regardless of the shape of electric conductor 13 as long as can make the position conducting corresponding of first, second resistive element 11,12 with pressing position.In the variation shown in Fig. 8 (a) and (b), first resistive element 11, second resistive element 12 to identical shaped with Fig. 2 (a) are provided with acyclic circular electric conductor 51.In this case, corresponding with the formation zone of first resistive element 11 and second resistive element 12 zone becomes area pressed.Form under the circular situation at electric conductor 51, comprise in the formation zone of electric conductor 51 not and first resistive element 11, second resistive element, 12 opposed zones, by printing area pressed in putting the above-mentioned printing thin (demonstration thin slice) that is stated from the front side, can make the operator discern area pressed.

And, in the above description, used the example of first, second circular resistive element 11,12, but the present invention is except circular as the endless resistive element, so long as the ring bodies of endless then also comprises other shapes.

Fig. 9 (a) and (b) are that the warpage of expression first resistive element, second resistive element is the figure of the variation of rectangular shape.In addition, in Fig. 9 (a) and (b), voltage loading part and voltage taking-up portion have been omitted.On the real estate of the second insulating properties substrate 61 that becomes second substrate, be formed with banded for no reason and whole first resistive element 62 of rectangular shape that is, leave Rack from the inner peripheral portion of this first resistive element 62, be formed with banded for no reason and whole second resistive element 63 of rectangular shape that is.And, on the real estate of the first insulating properties substrate 64 that becomes flexual first substrate, be formed with the electric conductor 65 of the rectangular shape that is corresponding with the formation zone of first resistive element 62 and second resistive element 63.In this case, can contact the formation zone of electric conductor 65 of leaving the ground opposite disposed, also become area pressed with first and second resistive element 62,63.

And the second insulating properties substrate 31 needs not be the different substrate that separates with the first insulating properties substrate 32, for example 1 flexible base plate that is made of polyester film etc. can also be converted into two parts.In this case, preferably adopt and the downside substrate of the substrate opposite disposed of the side that is pressed constituting of supporting by hard support plate such as steel plate.

Industrial utilizability

The present invention is applicable to the message input device that can import by contact analog information.

Claims (7)

1. variable resistance has:

One side becomes the front side that is performed pressing operation one side and has flexual first substrate;

The one side another side of this first substrate is relatively left also second substrate of opposite disposed;

Be arranged on first resistive element in the form of a ring of any one party in the one side of the another side of described first substrate and described second substrate;

Be arranged on same real estate with described first resistive element, second resistive element in the form of a ring to be provided with in the ring of described first resistive element with the state of this first resistive element insulation; With

Be arranged in the one side of the another side of described first substrate and described second substrate the opposing party arbitrarily, along with the pressing operation of described first substrate, make the electric conductor of the correspondence position conducting of described first resistive element corresponding and described second resistive element with pressing position to front side;

The part of described first resistive element is connected with the first voltage loading part conducting, the part of described second resistive element is connected with the second voltage loading part conducting, formed can be between described first voltage loading part and described second voltage loading part formation of on-load voltage.

2. variable resistance as claimed in claim 1 is characterized in that:

Described first resistive element at the cross part place that first imaginary line with two fens these first resistive elements intersects, is connected with the described first voltage loading part conducting; Described second resistive element, the connecting portion of described relatively first resistive element and described first voltage loading part, with across the central portion of described first resistive element and near the cross part of opposed described first imaginary line or its, be connected with the described second voltage loading part conducting.

3. variable resistance as claimed in claim 2 is characterized in that:

Described first resistive element, with two fens these first resistive elements and and the cross part place of second imaginary line that intersects of described first imaginary line, be connected with tertiary voltage loading portion conducting; Described second resistive element, the connecting portion of described relatively first resistive element and described tertiary voltage loading portion, with across the central portion of described first resistive element and near the cross part of opposed described second imaginary line or its, be connected with the 4th voltage loading part conducting; Formed between described tertiary voltage loading portion and described the 4th voltage loading part can on-load voltage formation.

4. variable resistance as claimed in claim 3 is characterized in that:

Described first imaginary line and described second imaginary line are vertical relation.

5. variable resistance as claimed in claim 1 is characterized in that:

Described first and second resistive elements can contact with described electric conductor and leave the ground opposite disposed.

6. variable resistance as claimed in claim 5 is characterized in that:

It is all wideer than the width of any one in described first and second resistive elements in the form of a ring that described electric conductor is configured to width.

7. as any described variable resistance in the claim 1～6, it is characterized in that:

Described first, second resistive element is formed by same printing process.

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