JP2005071875A - Illuminating type analog output push button switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To output an appropriate analog output signal to the outside corresponding to a pressing amount of press-operation for a movable part regardless of a moving time or a stationary time of the movable part. <P>SOLUTION: This illuminating type analog output push button switch has a cylindrical body 1, a movable part 2 movably housed in the body 1 along the axis of the body and press-operated to the one-end side of the axis, an energizing elastic body 3 in which the movable part 2 is energized to the other-end side of the axis, and a detection coil 4 which is installed around the axis in the body 1 and in which a high-frequency current flows. Then, the switch has a conducting means 5 which has conductivity on the one end side of the axis of the movable part 2 and which is inserted into and extracted from the detection coil 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an illuminated analog output pushbutton switch that is used in, for example, an amusement device and outputs an analog output signal corresponding to a pressing amount to the outside.

  Conventionally, various types of illuminated analog output pushbutton switches have been proposed and are commercially available. For example, as shown in FIG. 11, there is a non-contact type push button switch using photointerrupters 90, 90 formed of a light emitting unit and a light receiving unit. When a downward pressing force is applied to the movable portion 91, the movable portion 91 moves downward in the body 93 against the biasing force of the spring 92. At this time, since the detection means 94 provided on the lower side of the movable portion 91 is located between the two photointerrupters 90 and 90 provided on the detection substrate 95, the light from the light emitting portion is transmitted between the photointerrupters 90 and 90. Blocked. An ON or OFF binary signal is output by passing or blocking light between the photo interrupters 90 and 90. Further, a light emitting diode 96 is provided on the detection substrate 95, and the light emitting diode 96 is turned on / off.

As another example, in Patent Document 1, when a tapping force acts on a pad attached to a pressing head, the permanent magnet moves with a predetermined stroke against the biasing force of the coil spring together with the pressing head and passes through the coil. The generated magnetic flux changes, and an electromotive force is generated in the coil by electromagnetic induction. The magnitude of the electromotive force is a temporal change of the magnetic flux and is proportional to the moving speed of the pressing head. Further, the acceleration of the pressing head is detected based on the change in the magnitude of the electromotive force. An illuminated analog output pushbutton switch is described in which the magnitude of the tapping force is detected by extracting the obtained electromotive force and its change to the controller, and an analog signal corresponding to the tapping force is output to the display unit. ing.
Japanese Patent Laid-Open No. 6-103868 (pages 2 to 4 and FIG. 2)

  However, like the conventional illuminated analog output pushbutton switch, the movable part or the detection means and the detector such as a photo interrupter output a signal, the moving speed of the movable part such as the pressure head, The hitting force of the movable part can be output as an analog signal from the acceleration, but there is a problem that an analog signal corresponding to the pressing amount (movement distance) of the pressing operation to the movable part cannot be easily output. It was.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide an appropriate analog output signal corresponding to the pressing amount of the pressing operation to the movable part regardless of whether the movable part is moving or stationary. It is an object to provide an illuminated analog output pushbutton switch that can output to the outside.

  According to the first aspect of the present invention, a cylindrical body, a movable part that is housed in the body so as to be movable along the axis, and that is pushed to one end side of the axis, and the movable part is connected to the axis of the axis. An elastic body that urges toward the other end; and a detection coil that is provided around an axis in the body and through which a high-frequency current flows; and has conductivity on the one end side of the axis of the movable part, and the inside of the detection coil It has a conductive means for insertion / extraction.

  In this structure, when the movable part biased by the elastic body on the other end side of the shaft of the body is pushed to one end side against the biasing force, the conductive means having conductivity is a detection coil through which a high-frequency current flows. Inserted inside. Regardless of when the movable part is moving or stationary, eddy currents having different magnitudes are generated on the surface of the conductive means depending on the pressing amount of the movable part. The impedance of the detection coil changes due to the eddy current. As a result, an analog output signal corresponding to the amount of change in the impedance of the detection coil can be output to the outside, and an appropriate amount corresponding to the amount of pressing operation to the movable part is possible regardless of whether the movable part is moving or stationary. An analog output signal can be output to the outside with high reliability. Further, since a permanent magnet or the like is unnecessary and the number of parts is small and the assembly is easy, it can be manufactured at low cost. Furthermore, since it is a non-contact magnetic detection system in which the movable part and the detection coil do not contact each other, for example, it can withstand repeated use with respect to a pressing operation applied with a large impact stress such as an amusement machine.

  According to a second aspect of the present invention, in the first aspect of the present invention, the movable portion is formed in a bottomed cylindrical shape having an opening at one end side of the shaft, and the bottom portion of the movable portion has translucency. And a light emitting diode driven by an external circuit in the movable part. In this structure, the bottom of the movable part has translucency, and the light emitting diode is arranged in the movable part, so that even when the light emitted from the light emitting diode is small due to power saving, the movable part can be transmitted. The emitted light can be confirmed from the outside.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the conductive means is formed in a conical shape having an apex at one end of the shaft. In this structure, since the conical conductive means is inserted into the detection coil from the apex, an eddy current generated on the surface of the conductive means is increased in the middle of the insertion, and the impedance change of the detection coil is prevented from abruptly increasing. . Thereby, even when the pressing amount of the pressing operation to the movable portion is large, an appropriate analog output signal corresponding to the pressing amount can be output to the outside without being saturated with the upper limit value.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein one end side of the shaft of the movable portion is subjected to metal plating as the conductive means. . In this structure, since the number of windings on the other end side of the detection coil is small, the eddy current generated on the surface of the conductive means increases with respect to the change in the pressing amount to the movable portion 2, and the impedance change of the detection coil increases rapidly. To prevent becoming. Thereby, even when the pressing amount of the pressing operation to the movable portion is large, an appropriate analog output signal corresponding to the pressing amount can be output to the outside without being saturated with the upper limit value.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the conductive means is provided by performing metal plating on one end side of the shaft of the movable portion. In this structure, since the conductive means is provided in a part of the movable part, a separate conductive means is unnecessary. Thereby, it is possible to reduce the number of parts and to assemble easily.

  According to the present invention, it is possible to output an appropriate analog output signal according to the pressing amount of the pressing operation to the movable part regardless of when the movable part is moving or stationary.

(Embodiment 1)
First, a basic configuration of the first embodiment will be described with reference to FIGS.

  As shown in FIG. 1, the illuminated analog output pushbutton switch of the first embodiment is housed in a cylindrical body 1 and is pushed into one end side (lower side in FIG. 1) of the body 1. The movable part 2 includes a movable part 2, a spring 3 that urges the movable part 2 toward the other end side (upper side in FIG. 1) of the body 1, and a cylindrical detection coil 4 housed in the body 1. The conductive means 5 is provided on one end side (lower side). Furthermore, a fixed base 6 that supports the body 1, a detection substrate 7 that includes a light emitting diode 71, and a dedicated IC 8 that processes a signal from the detection coil 4 are provided as shown in FIG. 3.

  The body 1 is made of synthetic resin, and as shown in FIG. 1, a cylindrical base portion 10, an upper end portion 11 that protrudes inward along the circumference on the other end side (upper side in FIG. 1), and an internal It is comprised by the protrusion part 12 which protrudes in a perpendicular direction along the periphery in the approximate center part. The ridge portion 12 prevents the spring 3 from moving to one end side (lower side in FIG. 1).

  The movable part 2 is made of synthetic resin, and, as shown in FIG. 2, a cylindrical pressing part 20 in which a pressing force directly from the outside to one end side (lower side in FIG. 2) works, and one end side (lower side) of the pressing part 20 A locking portion 21 extending on the periphery of the body 1 and locking with the upper end portion 11 of the body 1, and a cylindrical body portion 22 continuous at the approximate center of one end side (lower side) of the pressing portion 20. . As shown in FIG. 1, most of the movable part 2 is housed on the other end side (upper side in FIG. 1) in the body 1, and only a part of the pusher 20 protrudes from the other end side (upper side) of the body 1. It has a configuration. When a pressing force is applied to the protruding pressing portion 20 toward one end (lower side in FIG. 1), the pressing portion 20 is accommodated in the body 1 in accordance with the pressing force.

  As shown in FIG. 2, the spring 3 is formed of a spiral metal wire, and is provided around the body portion 22 of the movable portion 2 in the body 1, and one end side (lower side in FIG. 2) is a protrusion of the body 1. The other end side (upper side in FIG. 2) supported by the strip portion 12 is locked to the locking portion 21 of the movable portion 2. The spring 3 has an elastic force and biases the movable part 2 toward the other end side (upper side) of the body 1. Specifically, when the pressing force to one end side (lower side) is not acting on the movable portion 2, the spring 3 is not connected so that the locking portion 21 of the movable portion 2 contacts the upper end portion 11 of the body 1. Energize to the end side (upper side).

  As shown in FIG. 1, the detection coil 4 is configured by winding a conducting wire around a cylindrical portion 40 a of the detection coil body 40 in a coil shape. The detection coil body 40 includes the cylindrical tubular portion 40a and flange portions 40b formed at both ends of the tubular portion 40a. The detection coil body 40 comes into contact with the lower side surface portion 12 a of the ridge portion 12 inside the body 1. A high-frequency current flows through the detection coil 4, and when the conductive means 5 is inserted into the cylindrical portion 40 a, that is, when the conductive means 5 is inserted into the detection coil 4, the impedance of the detection coil 4 changes. The detection coil 4 is connected to a dedicated IC 8.

  The conductive means 5 is made of a conductive material such as Cu, Ni, and Cr, for example, and as shown in FIG. 2, a member made of the above material is connected to one end side (lower side in FIG. 2) of the movable portion 2. Provided. The conductive means 5 can be inserted into and removed from the detection coil 4. If a high-frequency current flows through the detection coil 4 when the detection coil 4 is inserted, an eddy current is generated on the surface of the conductive means 5.

  The fixed base 6 includes a disk-shaped support base 61 having an electrical terminal 60 in the approximate center, a cylindrical body portion 62 that houses the electrical terminal 60 inside the support base 61, and a peripheral edge of the support base 61. It is comprised with the attaching parts 63 and 63 which protrude from. As shown in FIG. 2, the fixed base 6 supports the body 1 by abutting with one end side (lower side in FIG. 2) of the body 1 on the outer periphery of the support base 61. The attachment portions 63 and 63 have a spring property that urges outward. For example, when attaching to an attachment panel or the like, the attachment portions 63 and 63 are fixed by urging the side surfaces of the attachment panel.

  The electrical terminal 60 includes an applied voltage terminal 60a for applying a voltage to the detection coil 4, an output voltage terminal 60b for outputting an analog output signal obtained by a dedicated IC 8 described later from the impedance change of the detection coil 4, and a later described It comprises a control terminal 60c for controlling the light emitting diode 71 and a ground terminal 60d. The applied voltage terminal 60a, the output voltage terminal 60b, and the ground terminal 60d are connected to a dedicated IC 8 (described later) in order to connect to the detection coil 4. Specifically, the applied voltage terminal 60a is connected to a reference voltage circuit 8a described later, and the output voltage terminal 60b is connected to an output circuit 8e described later. The control terminal 60c and the ground terminal 60d are connected to a light emitting diode 71 described later.

  As shown in FIG. 1, the detection substrate 7 is brought into contact with a support base 61 of the fixed base 6. The detection substrate 7 includes a base 70, a light emitting diode 71, and a connection terminal 72 that connects the base 70 and the light emitting diode 71. The light emitting diode 71 is controlled to be supplied with power, turned on and off by an external circuit (not shown) independently of the pressing operation to the movable portion 2. The connection terminal 72 is connected to the control terminal 60c and the ground terminal 60d.

  As shown in FIG. 3, the dedicated IC 8 includes a reference voltage circuit 8a, an oscillator drive circuit 8b, a detection circuit 8c, a rectifier circuit 8d, and an output circuit 8e. The reference voltage circuit 8a stably supplies the applied voltage (Vcc in FIG. 3) from the applied voltage terminal 60a to each circuit in the dedicated IC 8. Even if the applied voltage (Vcc) from the applied voltage terminal 60a fluctuates, it can be supplied to each circuit stably by the reference voltage circuit 8a. The oscillator drive circuit 8b supplies a high frequency current to the detection coil 4 and outputs a high frequency voltage waveform whose amplitude changes due to the impedance change of the detection coil 4 to the detection circuit 8c. The detection circuit 8c extracts a half wave of the high frequency voltage waveform output from the oscillator drive circuit 8b. The rectifier circuit 8d converts the half wave output from the detection circuit 8c into a DC voltage. However, the magnitude of the DC voltage of the rectifier circuit 8d is saturated with the magnitude of the supply voltage from the reference voltage circuit 8a. The output circuit 8e impedance-converts the DC voltage obtained by the rectifier circuit 8d and outputs it as an analog output signal to the outside through the output voltage terminal 60b.

  In the first embodiment, as shown in FIG. 1, a cylindrical detection coil 4 through which a high-frequency current flows is provided in the body 1, and conductive means having conductivity on one end side (lower side in FIG. 1) of the movable portion 2. 5, and the conductive means 5 is inserted into and removed from the detection coil 4.

  The operation principle of Embodiment 1 will be described with reference to FIG. The first embodiment is an illuminated analog output pushbutton switch that uses a high-frequency magnetic detection method to convert a pressing amount to the movable portion 2 in the axial direction (vertical direction in FIG. 1) of the body 1 into an analog output signal. The high-frequency magnetic detection method is a detection method that utilizes the fact that an eddy current is generated in a nearby conductor by flowing a high-frequency current through the coil and the impedance of the coil changes due to the eddy current, and has high reliability. Thus, an analog output signal can be output. First, when a pressing force from the outside to the one end side (the lower side in FIG. 1) is not applied to the pressing portion 20 of the movable portion 2, the movable portion 2 is moved to the other end side (the upper side in FIG. 1) by the biasing force of the spring 3. However, since the locking portion 21 of the movable portion 2 is hooked on the upper end portion 11 of the body 1, it stops without moving to the other end side (upper side) any more. Next, in this state, when a pressing force is exerted on the pressing portion 20 of the movable portion 2 from the outside to one end side (lower side), the movable portion 2 moves to one end side (lower side). When the movable part 2 moves slightly to one end side (lower side), a part of the conductive means 5 is inserted into the detection coil 4. At this time, a high-frequency current flows through the detection coil 4 from the dedicated IC 8 (see FIG. 3). Since the conductive means 5 has conductivity, when it is inserted into the detection coil 4, an eddy current is generated on the surface of the portion where the conductive means 5 is inserted, and the impedance in the detection coil 4 changes due to this eddy current. The amplitude of the high-frequency voltage waveform received from the detection coil 4 by the oscillation drive circuit 8b (see FIG. 3) of the dedicated IC 8 (see FIG. 3) is changed by this amount of change in impedance, and this waveform is analogized by the dedicated IC 8 (see FIG. 3). It is converted into an output signal and output to the outside via the output voltage terminal 60b. When a force pushing further toward the one end side (lower side) is applied to the movable portion 2, the conductive means 5 is further inserted into the detection coil 4 and the impedance change of the detection coil 4 increases, so that the analog converted from the amount of change in impedance. The output signal also increases. Further, even when the movable part 2 is stationary while the force pressing from the outside to the one end side (downward) is applied, a high-frequency current flows through the detection coil 4, so an eddy current is generated in the conductive means 5. Since the impedance of the detection coil 4 changes, an appropriate analog output signal can be output to the outside according to the pressing amount even when stationary. Next, when the force pushing from the movable part 2 to one end side (lower side) is removed, the movable part 2 moves to the other end side (lower side) by the biasing force of the spring 3, and the locking part 21 is moved to the upper end of the body 1. It is returned to the original position by being caught by the part 11 and being stationary.

  As described above, according to the first embodiment, when the movable part 2 is pushed to one end side (downward), the conductive means 5 is inserted into the detection coil 4 through which a high-frequency current flows, and the movable part 2 is moved or stationary. Regardless of the time, eddy currents having different magnitudes are generated on the surface of the conductive means 5 depending on the amount of pressing to the movable part 2. The impedance of the detection coil 4 changes due to the eddy current, and an analog output signal corresponding to the amount of change is output to the outside. Accordingly, an appropriate analog output signal corresponding to the pressing amount of the pressing operation to the movable part 2 can be output to the outside with high reliability regardless of whether the movable part 2 is moving or stationary. Further, since a permanent magnet or the like is unnecessary and the number of parts is small and assembly is easy, it can be manufactured at low cost. Furthermore, since it is a non-contact magnetic detection system in which the movable part 2 and the detection coil 4 do not contact each other, for example, it can withstand repeated use with respect to a pressing operation applied with a large impact stress such as an amusement machine.

  As a modification of the first embodiment, the body 1 may have a cylindrical shape other than the cylindrical shape. With this structure, the outer shape can be set freely.

  As another modification of the first embodiment, the conductive means 5 may be provided by winding or sticking a conductive member on the surface of the movable portion 2. With this structure, the amount of conductive members used can be reduced.

  Furthermore, as another modification of the first embodiment, rubber is provided inside the body 1 as an elastic body instead of the spring 3, one end of the rubber is the locking portion 21 of the movable portion 2, and the other end is the body 1. The movable portion 2 may be urged to the other end side by an urging force of rubber.

(Embodiment 2)
Differences from the first embodiment regarding the basic configuration of the second embodiment will be described.

  In the second embodiment, as shown in FIG. 4, the movable part 2 is formed in a bottomed cylindrical shape having one end side (lower side in FIG. 4) as an opening, and the other end side (upper side in FIG. 4) of the movable part 2. The light emitting diode 71 driven by an external circuit (not shown) is housed in the cavity 24 in the movable part 2.

  The bottom portion 23 is made of synthetic resin such as polycarbonate or ABS, and the light emitting state can be confirmed from the outside of the movable portion 2 when the light emitting diode 71 provided in the cavity portion 24 emits light.

  The cavity portion 24 is formed from one end side (lower side) to the inside excluding a part of the pressing portion 20 in the movable portion 2. The cavity 24 is set to a size that can accommodate the light emitting diode 71 and the connection terminal 72 connected to the light emitting diode 71.

  The light emitting diode 71 is accommodated in the cavity 24 away from the detection substrate 7 by making the connection terminal 72 longer. If the light emitting diode 71 is placed on the other end side (upper side) in the cavity portion 24, light from the light emitting diode 71 is more strongly spread to the outside of the movable portion 2, so that it can be easily confirmed from the outside. However, a force that pushes the movable portion 2 toward one end (lower side) acts and the movable portion 2 moves to one end side (lower side), so that the gap between the other end side (upper side) of the cavity portion 24 and the light emitting diode 71 is increased. It is necessary to prevent the light emitting diode 71 and the movable portion 2 from colliding with a distance.

  In the above-described illuminated analog output pushbutton switch, the light emitted from the light emitting diode 71 is likely to spread outside the movable portion 2.

  As described above, according to the second embodiment, the bottom portion 23 of the movable portion 2 has translucency, and the light emitting diode 71 is disposed in the movable portion 2, so that the light emitted from the light emitting diode 71 due to power saving is small. Even in this case, the movable part 2 can be transmitted, and the emitted light can be confirmed from the outside.

(Embodiment 3)
Differences from the first embodiment regarding the basic configuration of the third embodiment will be described.

  As shown in FIG. 5, the third embodiment is characterized in that the conductive means 5 having conductivity has a conical shape with one end side (the lower side in FIG. 5) as a vertex.

  The conductive means 5 is provided on one end side (lower side) of the columnar movable part 2. The conical conductive means 5 is dimensioned so that a pressing amount to one end side (lower side) of the movable portion 2 described later and a voltage value of the analog output signal are in a proportional relationship.

  The operation principle of the third embodiment will be described with reference to FIG. First, as shown in FIG. 5 (a), when the pressing force to one end side (lower side) acts on the movable portion 2 and the conductive means 5 is inserted into the detection coil 4 through which a high-frequency current flows, the conductive portion 5 is electrically conductive. Since the insertion portion of the means 5 is separated from the detection coil 4 only in the vicinity of the conical apex, the eddy current generated on the surface of the conductive means 5 is small, and therefore the amount of change in the impedance of the detection coil 4 is also small. Next, as shown in FIG. 5 (b), the force that pushes the movable part 2 toward one end side (lower side) acts, and the conductive means 5 is further inserted into the detection coil 4 than in FIG. 5 (a). Since the insertion portion of the conductive means 5 is included up to the conical bottom surface and the distance from the detection coil 4 is short, the eddy current generated on the surface of the conductive means 5 becomes large, and the amount of change in the impedance of the detection coil 4 is also large. growing. The amplitude of the high-frequency voltage waveform received by the dedicated IC 8 from the detection coil 4 is changed by the amount of change in impedance, and this waveform is converted into an analog output signal and output to the outside. As described above, it is possible to prevent the impedance of the detection coil 4 from abruptly changing with respect to a change in the pressing amount toward the one end side (lower side) of the movable portion 2. Further, even when the movable part 2 is stationary while the force pressing from the outside to the one end side (downward) is applied, a high-frequency current flows through the detection coil 4, so an eddy current is generated in the conductive means 5. Since the impedance of the detection coil 4 changes, an appropriate analog output signal corresponding to the pressing amount can be output to the outside even when the coil is stationary.

  Next, the relationship between the amount of pressing to the one end side (lower side) of the movable part 2 and the voltage value of the analog output signal will be described with reference to FIG. When the conductive means 5 is columnar or cylindrical, the impedance change of the detection coil 4 rapidly increases because the insertion portion of the conductive means 5 is close to the detection coil 4 even when the pressing amount to the movable part 2 is small. For this reason, as shown in FIG. 6A, when the pushing amount to the movable portion 2 increases, the voltage value of the analog output signal reaches the upper limit value (Vcc) and is saturated, so that an appropriate analog output signal is obtained. Can't get. On the other hand, if the conductive means 5 is conical, the insertion portion of the conductive means 5 and the detection coil 4 are separated from each other, and the impedance change of the detection coil 4 is small. Therefore, as shown in FIG. Even when the pressing amount is large, the analog output signal can be obtained without saturation at the upper limit value (Vcc).

  As described above, according to the third embodiment, since the conical conductive means 5 is inserted into the detection coil 4 from the apex, the surface of the conductive means 5 with respect to the change in the pressing amount toward the one end side (lower side) of the movable portion 2. This prevents the eddy current generated in the current from increasing and the impedance change of the detection coil 4 from rapidly increasing. Thereby, even when the pressing amount of the pressing operation to the movable portion 2 is large, an appropriate analog output signal corresponding to the pressing amount can be output to the outside without being saturated at the upper limit value (Vcc).

  As a modification of the third embodiment, the conductive means 5 may be provided by forming one end side of the movable portion 2 in a conical shape and winding or sticking a conductive member on the surface of the movable portion 2. . With this structure, the one end side can be formed into a conical shape at the time of forming the movable portion 2 and the amount of the conductive member used can be reduced.

(Embodiment 4)
Differences from the first embodiment regarding the basic configuration of the fourth embodiment will be described.

  As shown in FIG. 7, the fourth embodiment is characterized in that the number of windings on the other end side (upper side in FIG. 7) of the detection coil 4 is smaller than the number of windings on one end side (lower side in FIG. 7). .

  The detection coil body 40 of the fourth embodiment is provided with a separation portion 40c that protrudes outside the cylindrical portion 40a (see FIG. 1). The separation part 40c has substantially the same shape as the collar part 40b, and protrudes in the vertical direction along the circumference outside the cylinder part 40a (see FIG. 1). The detection coil 4 is provided so that the number of windings on the other end side (upper side) from the separation part 40c is smaller than that on one end side (lower side). The number of windings of the detection coil 4 is set so that the pressing amount toward one end (downward) of the movable portion 2 and the voltage value of the analog output signal are in a proportional relationship.

  The operation principle of the fourth embodiment will be described with reference to FIG. First, as shown in FIG. 8 (a), a pressing force to one end side (lower side in FIG. 8) acts on the movable portion 2, and the conductive means 5 is only on the other end side (upper side in FIG. 8) of the detection coil 4. Inserted into. Since the other end side (upper side) of the detection coil 4 has a small number of windings, the generated magnetic flux is small. Since the magnetic flux is small, the eddy current generated on the surface of the conductive means 5 is small, and therefore the amount of change in the impedance of the detection coil 4 is small. Next, as shown in FIG. 8 (b), the pressing force further acts on the movable portion 2 toward one end side (lower side), and the conductive means 5 is inserted to one end side (lower side) in the detection coil 4. Since one end side (lower side) of the detection coil 4 has a large number of windings, the generated magnetic flux is large. Since the magnetic flux is large, the eddy current generated on the surface of the conductive means 5 is increased, so that the amount of change in the impedance of the detection coil 4 is also increased. The amplitude of the high-frequency voltage waveform received by the dedicated IC 8 from the detection coil 4 is changed by the amount of change in impedance, and this waveform is converted into an analog output signal and output to the outside. As described above, by changing the magnetic flux distribution on one end side (lower side) and the other end side (upper side) of the detection coil 4, the detection coil is adapted to change in the pressing amount toward the one end side (lower side) of the movable part 2. It is possible to prevent the impedance of 4 from changing abruptly. Further, even when the movable part 2 is stationary while the force pressing from the outside to the one end side (downward) is applied, a high-frequency current flows through the detection coil 4, so an eddy current is generated in the conductive means 5. Since the impedance of the detection coil 4 changes, an appropriate analog output signal corresponding to the pressing amount can be output to the outside even when the coil is stationary.

  As described above, according to the fourth embodiment, since the number of windings on the other end side (upper side) of the detection coil 4 is small, the surface of the conductive means 5 against the change in the pressing amount toward the one end side (lower side) of the movable portion 2. This prevents the eddy current generated in the current from increasing and the impedance change of the detection coil 4 from rapidly increasing. Thereby, even when the pressing amount of the pressing operation to the movable portion 2 is large, an appropriate analog output signal corresponding to the pressing amount can be output to the outside without being saturated with the upper limit value.

  As a modification of the fourth embodiment, two or more separation parts 40c may be provided in the detection coil body 40 to divide the number of windings into three or more. In this structure, the impedance of the detection coil 4 can be changed smoothly when the detection means 5 spans between different windings of the detection coil 4.

(Embodiment 5)
Differences from the first embodiment regarding the basic configuration of the fifth embodiment will be described.

  As shown in FIG. 9, the fifth embodiment is characterized in that a metal plating process is performed as the conductive means 5 on one end side (lower side in FIG. 9) of the movable portion 2.

  As shown in FIG. 9B, the conductive means 5 performs metal plating such as Cu plating, Ni plating, and Cr plating on the body 22 of the movable part 2 shown in FIG. 9A. Provided by. Since the trunk portion 22 includes the conductive means 5, the trunk portion 22 has a length sufficient for the conductive means 5 to insert and remove the detection coil 4.

  As described above, according to the fifth embodiment, since the conductive means 5 is provided by performing metal plating on the movable portion 2, there is no need to provide the conductive means 5 as a separate component. Thereby, it is possible to reduce the number of parts and to assemble easily.

(Embodiment 6)
As shown in FIG. 10, the sixth embodiment is configured to include all the characteristic portions of the second to fifth embodiments. The light emitting diode 71 is housed in the cavity 24 in the movable portion 2 as in the second embodiment. The conductive means 5 has a conical shape with one end side (the lower side in FIG. 10) as the apex, as in the third embodiment, and is provided with a metal plating process as in the fifth embodiment. Similarly to the fourth embodiment, the detection coil 4 is provided with a smaller number of windings on the other end side (upper side in FIG. 10) than on one end side (lower side).

  According to the sixth embodiment, even when the light emitted from the light emitting diode 71 is small due to power saving, the light can be transmitted through the movable portion 2 and the emitted light can be confirmed from the outside. Further, the analog output output signal is prevented from being saturated at the upper limit value by the conical detection means 5 and the detection coil 4 having two different numbers of windings, so that the pressing amount of the pressing operation to the movable portion 2 is large. In this case, an appropriate analog output signal corresponding to the pressing amount can be obtained. Furthermore, since the conductive means 5 is provided by metal plating, the number of parts can be reduced and the assembly can be easily performed. Thereby, an appropriate analog output signal corresponding to the pressing amount of the pressing operation to the movable part 2 can be output to the outside regardless of whether the movable part 2 is moving or stationary.

It is product sectional drawing of the illumination type analog output pushbutton switch of Embodiment 1 by this invention. It is a component block diagram same as the above. It is a detection circuit diagram same as the above. It is product sectional drawing of the illumination type analog output pushbutton switch of Embodiment 2 by this invention. It is a figure which shows the operation state of the illumination type analog output pushbutton switch of Embodiment 3 by this invention, Comprising: (a) is a figure in which a part of electroconductive means is inserted in the detection coil, (b) is large of an electroconductive means. It is a figure by which the part is inserted in the detection coil. It is a figure which shows the analog output voltage with respect to the pressing amount of a movable part same as the above, Comprising: (a) is the case where the electroconductive means is formed in the column shape, (b) is the electroconductive means formed in the cone shape. Is the case. It is a detection coil sectional drawing of the illumination type analog output pushbutton switch of Embodiment 4 by this invention. It is a figure which shows an operation state same as the above, (a) is a figure in which a part of electroconductive means is inserted in the detection coil, (b) is a figure in which most electroconductive means is inserted in the detection coil. It is a figure which shows the movable part of the illumination type analog output pushbutton switch of Embodiment 5 by this invention, Comprising: (a) is sectional drawing before providing a conductive means, (b) is sectional drawing after providing a conductive means It is. It is product sectional drawing of the illumination type analog output pushbutton switch of Embodiment 6 by this invention. It is sectional drawing of the conventional pushbutton switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body 2 Movable part 3 Spring 4 Detection coil 5 Conductive means 6 Fixed base 7 Detection board 71 Light emitting diode 8 Dedicated IC

Claims (5)

A tubular body,
A movable part that is housed in the body so as to be movable along the axis and is pushed to one end of the axis;
An elastic body that biases the movable portion toward the other end of the shaft;
A detection coil provided around the axis in the body and through which a high-frequency current flows,
An illuminated analog output pushbutton switch having conductive means on one end side of the shaft of the movable part and having conductive means for inserting and removing the inside of the detection coil. The movable part is formed in a bottomed cylindrical shape having an opening on one end side of the shaft,
The bottom of the movable part has translucency,
2. The illuminated analog output pushbutton switch according to claim 1, further comprising a light emitting diode driven by an external circuit in the movable portion. 3. The illuminated analog output pushbutton switch according to claim 1 or 2, wherein the conductive means is formed in a conical shape having an apex at one end of the shaft. 4. The illuminated analog output pushbutton switch according to claim 1, wherein the number of windings of the conducting wire on the other end side of the shaft in the detection coil is smaller than the number of windings of the conducting wire on the one end side. . The illuminated analog output pushbutton switch according to any one of claims 1 to 4, wherein a metal plating process is applied to the one end side of the shaft of the movable portion as the conductive means.

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