TW201608435A - Electronic pen - Google Patents

Abstract

The purpose of the present invention is to achieve a pen output corresponding to a pen pressure. To change an inductance value (L) of a resonance operation coil (21) in accordance with a pen pressure which a pen tip member (3) receives from an object (Q1) to be pressed, the present invention has a plate-shaped pressure detection metal slider (16) made from a non-magnetic, highly-conductive metal material, the slider being provided at a rear end surface position of a resonance operation coil (21), thereby realizing a highly practical electronic pen (1) for which a structure can easily be devised for preventing members within a casing (2) from being damaged by external impacts to the casing (2).

Description

Electronic pen

The present invention relates to an electronic pen, and in particular to an electronic message that is obtained to correspond to a pen pressure.

As an information processing device having a flat panel display portion, there is a method of forming an information input means for the user to press the electronic pen on the flat display panel portion while performing information between the flat panel portion and the flat panel portion. Exchange.

In the past, it has been proposed that the information input means can perform information in response to the change in the writing pressure when the pen tip member is pressed to the flat panel display portion as the pressing target to exchange information. In the electronic pen, a resonance circuit means for changing the inductance value of the resonance coil by the pen pressure to change the resonance frequency is provided in the electronic pen (see Patent Documents 1, 2 and 3).

In the electronic pen of Patent Document 1, the ferrite wafer provided in the nib member is moved by the writing pressure in the coil of the resonance circuit means, and the inductance value of the resonance coil is changed.

The electronic pen of Patent Document 2 is made of a resonance coil. The ferrite core integrated with the nib member is passed through a pressing ring formed of an elastic member to be butted at the tip end of the ferrite core formed by the winding, and is changed when the ferrite wafer is pressed by the pen press. The inductance value of the resonant coil.

Further, in the electronic pen of Patent Document 3, the ferrite core for detection integrated with the pen tip member is abutted against the tip end of the ferrite core body wound around the resonance coil, and is pressed by the pen pressure. The ferrite core for detection is close to the body of the ferrite core, thereby changing the inductance value of the coil for resonance.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Invention Patent Publication No. 64-53223

[Patent Document 2] Japanese Invention Patent Publication No. 2002-244806

[Patent Document 3] Japanese Invention Patent Publication No. 2006-163798

However, such a conventional electronic pen has a disadvantage in that the ferrite member that integrally moves with the pen point member is provided for the resonance coil to change the inductance value of the resonance coil.

First, the presence of a ferrite member generally has a large variability, which directly affects the variability of the pen pressure characteristics of the electronic pen.

In addition, in the second aspect, the ferrite member is usually a brittle material for the impact given from the outside, so it is indispensable not to give an impact to the electronic pen. There is a problem of structural damage that may occur, and there is a problem that it is difficult to simplify and reduce the weight of the electronic pen.

The present invention has been made in view of the above points, and provides an electronic pen which changes the inductance value of the resonance coil, effectively solves the problem of the variability of the magnetic characteristics, and the problem of structural fragility, thereby improving the practicality.

In order to solve the above problems, the present invention provides an electronic pen 1 in which a nib member 3 provided at a tip end of a pen-type housing 2 made of a non-magnetic material is pressed to a pressing object Q1 that generates an input driving signal magnetic field, thereby obtaining The electronic pen is internally provided with the pressing shaft 12, and when the pen point member 3 is pressed against the pressing object Q1, the pen tip member 3 is in front of the housing 2 on the center axis L1 from the front. The plate-shaped pressure detecting metal slider 16 is disposed on the central axis L1 at a position corresponding to the rear end surface of the pressing shaft 12, and is made of a non-magnetic or conductive metal material; and the resonant operation coil 21 is provided. The front end portion of the casing 2 between the rear end surface of the nib member 3 and the front end surface of the pressing detection metal slider 16 in the front end portion 2A of the casing 2 is formed such that the pressing shaft 12 passes through The resonance operation capacitors 25-1 to 25-m perform resonance operation together with the resonance operation coil 21, and the resonance circuit 40A is provided in the casing 2 as the electron transmission. The information is generated to generate an inductance value according to the resonance operation coil 21 and the resonance operation capacitors 25-1 to 25- a resonance current of a resonance frequency determined by a capacitance value of m, and the resonance current flows into the resonance operation coil 21; and when the nib member 3 is pressed against the pressing target Q1, the press detection metal slider 16 is caused to be based on The pen tip member 3 is moved by the pen pressure to be separated from the rear end surface of the resonance operation coil 21, and the inductance value of the resonance operation coil 21 is changed to change the resonance frequency of the resonance current in accordance with the pen pressure. .

According to the present invention, when the pen tip member is changed from the pen pressure received by the pressing member to change the inductance value of the resonant operation coil, the rear end surface of the resonant operation coil is disposed to be non-magnetic and electrically conductive. A plate-shaped press-detecting metal slider formed of a metallic material makes it possible to realize an electronic pen, and it is easy to produce a structure that does not cause damage to a member inside the casing due to an impact from the outside of the casing, and High practicality.

1‧‧‧Electronic pen

2‧‧‧Shell

3‧‧‧ nib members

11‧‧‧Resonance Circuit Mechanism Department

11A‧‧‧ Pen Pressure Response Department

12‧‧‧Pressing shaft

13‧‧‧Open hole

14‧‧‧Outside shell

14A‧‧‧ next door

15‧‧‧ inside shell

15A‧‧‧Ring-like steps

16‧‧‧Press detection metal slider

16A‧‧‧ fitting holes

17‧‧‧Support shaft

15B‧‧‧Ring-shaped rear step

40‧‧‧Electrical Signal Processing Department

40A‧‧‧Resonance circuit

40B‧‧‧Resonant frequency switching circuit

Q1‧‧‧ flat panel display

Q2‧‧‧Central Processing Department

Q3‧‧‧Exchange information

Q4‧‧‧Information Processing System

Q5‧‧‧ display surface

Q6‧‧‧X-axis control department

Q7‧‧‧Y-axis control department

X1~XN‧‧‧X-axis toroidal coil

Y1~YM‧‧‧Y-axis toroidal coil

[Fig. 1] (A) and (B) are perspective views showing an electronic pen in the first embodiment and a schematic block diagram showing the information processing system.

[Fig. 2] is a partial cross-sectional view showing the detailed configuration of the electronic pen.

[Fig. 3] is an electrical circuit diagram shown in the electrical signal processing unit.

[Fig. 4] (A), (B), and (C) are a plan view, a front view, and a left side view of the pen pressure response portion.

(Fig. 5) (A), (B), and (C) are signal waveform diagrams for explaining characteristics of the resonant circuit mechanism portion.

Fig. 6 is a partial cross-sectional view showing another embodiment of the electronic pen.

Fig. 7 is an electrical circuit diagram showing another embodiment of the electrical signal processing unit.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) First embodiment

In Fig. 1, reference numeral 1 denotes an electronic pen as a whole, and as shown in Fig. 1(A), a tip having a non-magnetic resin material is formed from a tip end of a pen-shaped casing 2 made of, for example, a non-magnetic resin material. The structure of the member 3 is prominent.

As shown in FIG. 1(B), the electronic pen 1 is configured such that the user holds the casing 2 of the electronic pen 1 and presses the pen point member 3 to the display surface Q5 of the flat display panel portion Q1 as a pressing target. Specify the XY coordinate position on display surface Q5.

In other words, the electronic pen 1 is formed in the information processing system Q4 in which the information Q3 is exchanged between the flat panel display unit Q1 and the central processing unit Q2 to perform information processing, and the electronic pen is used by the user. When the display surface Q5 of the flat display panel portion Q1 to be pressed is pressed, the X-axis toroidal coils X1, X2, ..., XN and the Y-axis toroidal coils Y1, Y2 indicating the XY coordinates of the display surface Q5 are formed. The XY coordinate position determined by the position of the intersection of ... and YM is specified so that the user's XY coordinate designation information can be supplied from the X-axis control unit Q6 to the central processing unit Q2 as the exchange information Q3.

The central processing unit Q2 reads the coordinate position designated by the user and the pen pressure information of the electronic pen 1 on the display surface Q5, and executes processing according to the user's designated information.

As shown in FIG. 2, the nib member 3 of the electronic pen 1 is coupled to the resonant circuit mechanism portion 11 disposed inside the distal end portion 2A of the casing 2 via the pressing shaft 12.

In the case of the present embodiment, the pressing shaft 12 is formed of a rod having a circular cross section made of a non-magnetic resin material, and is disposed along the central axis L1 of the casing 2 so as to be disposed through the casing 2. The forward and backward movement of the nib member 3 in the opening hole 13 at the front end is transmitted to the resonance circuit mechanism portion 11.

The casing 2 is configured by a cylindrical outer casing 14 elongated on the central axis L1 and a cylindrical inner casing 15 disposed concentrically on the inner axis L1 at the inner side thereof, and is connected to the outer casing. The partition wall 14A provided in the rear end side of the opening hole 13 of the 14 is slidably held so as to be movable forward and backward in the front-rear direction.

The rear end portion of the pressing shaft 12 is inserted through the fitting hole 16A of the plate-shaped pressure detecting metal slider 16 which is made of a non-magnetic or conductive metal plate material made of aluminum or a brass material, and is bonded to Synthetic resin A support shaft 17 made of material.

The rear end portion of the support shaft 17 is slidably held by a guide hole 18 formed in the inner case 15 along the center axis L1, thus forming the pen point member 3, the pressing shaft 12, the press detecting metal slider 16, The support shaft 17 can be moved back and forth as a unit on the central axis L1 of the electronic pen 1.

Between the rear surface of the partition wall 14A of the outer casing 14 and the annular step portion 15A provided on the front end surface of the inner casing 15, a cylindrical resonance coil 21 is fixed so that the pressing shaft 12 penetrates. At the same time, a pressing spring 22 is provided between the rear end surface of the pressing detection metal slider 16 and the annular rear step portion 15B provided at the rear position of the annular step portion 15A of the inner casing 15.

The pressing spring 22 is configured to perform a compression operation between the pressing detection metal slider 16 and the annular rear step portion 15B, and maintains the front end surface of the pressing detection metal slider 16 when the pressing shaft 12 does not move rearward. The rear end of the resonant action coil 21 faces.

When the nib member 3 is not pressed to the reset state of the flat display panel portion Q1 as the pressing target, the interval between the front end surface of the press detecting metal slider 16 and the rear end surface of the resonance operation coil 21 is maintained at 0. (This is called the reset interval) state.

In the case of the present embodiment, the resonant circuit mechanism portion 11 serves as a pen pressure response portion of the resonant operation coil 21 that is integrally fixed to the case 2 with respect to the outer case 14 and the inner case 15 of the case 2 11A, having a pressing shaft 12 that slides integrally with the nib member 3, and a press test The metal slider 16 and the support shaft 17 are measured, and the pen pressure response portion 11A is formed as a press-detecting metal slider 16 to have a diameter R1 which is substantially the same as the cylindrical inner diameter of the inner case 15 as shown in FIG. The cylindrical surface portion 16A and the same cut surfaces 16B1 and 16B2 (opposite distance R2) when viewed from the side (Fig. 4(C)) and the upper and lower sides of the cylindrical surface 16A are cut off The inductance lead-out wires 21A and 21B ( FIG. 3 ) derived from the resonant operation coil 21 provided to face the front end of the press-detecting metal slider 16 do not interfere with the press-detecting metal slider 16 . The mode is led to the electric signal processing unit 40 at the rear position by cutting the outer positions of the faces 16B1 and 16B2.

In the case where the diameter of the casing 2 is small, the resonance operation coil 21 and the electric signal processing unit on the front side and the rear side of the press detection metal slider 16 can be easily realized. Electrical connection between 40.

Further, the characteristics of the resonant circuit mechanism portion 11 including the pen pressure response portion 11A in the case of the present embodiment are configured as shown in Figs. 5(A) to (C).

As shown in Fig. 5(A), the relationship between the load F (i.e., the pen pressure) and the amount of movement δ of the pen pressure response portion 11A (i.e., the amount of displacement of the pressing spring 22) is selected as follows: load F (i.e., pen pressure) The relationship between the displacement amount δ (that is, the amount of movement of the writing pressure response portion 11A) between 0, 0.1, 0.2, ..., 1 as a value of the standardization is changed by the displacement amount δ 0, 0.4, 0.65, ..., 1.

Further, the amount of movement δ of the pen pressure response portion 11A (ie, pressing) The relationship between the displacement amount of the spring 22 and the inductance value L of the harmonic vibration action coil 21 is as shown in Fig. 5(B), and is selected as follows: the movement amount δ is changed to 0, 0.2, 0.4, ... In the case of 1, the inductance value L of the resonant operation coil 21 is changed to 0.7, 0.84, 0.9, ..., 1.

When such a characteristic is selected, the relationship between the load F (ie, the pen pressure) and the inductance value L is applied to the load F-displacement of FIG. 5(A) by applying the characteristic of the movement amount δ-inductance value L of FIG. 5(B). In the relationship of the amount δ, as shown in FIG. 5(C), it is possible to realize that the inductance value L becomes 0, 0.32 while the load F (ie, the writing pressure) is changed to 0, 0.1, 0.2, ..., 1. Characteristics of 0.546, ..., 1.

Here, as can be seen from the characteristic of the load F/displacement amount δ (Fig. 5(A)), the pressing spring 22 is sharply erected during the period in which the writing pressure F changes from 0 to 0.2. The spring characteristics are chosen in a way.

Here, the characteristic of the inductance value L of the resonance operation coil 21 (Fig. 5(B)) is such that the inductance value L increases as the movement amount δ increases until the pressure detection metal slider 16 is separated from the resonance operation coil 21. In particular, it is assumed that the inductance value L rises sharply during a period in which the amount of movement δ changes from 0 to 0.2.

This result is shown in FIG. 5(C), and the change of the inductance value L caused by the load F (ie, the pen pressure) of the electronic pen 1 is realized, and the load F (ie, the pen pressure) can be changed from 0 to 0.2. During the light load period, the inductance value L rises sharply.

The electronic pen 1 having the sharp rising characteristic as shown in FIG. 5(C) indicates that the electronic pen 1 is initially pressed to the flat as the pressing target. The so-called "pen down characteristic" at the time of the board display panel portion Q1 can have a high sensitivity characteristic, so that the practicality of the electronic pen 1 can be further improved.

In the case of the present embodiment, the resonance operation coil 21 is fixed to the vicinity of the nib member 3 with respect to the nib member 3 only between the partition wall 14A of the outer case 14 of the casing 2 .

When the user presses the electronic pen 1 to the flat display panel portion Q1 as the pressing target, the user receives the input by the magnetic field coupling of the Y-axis toroidal coils Y1, Y2, ..., YM from the flat panel display portion Q1. When the pulse magnetic field is driven to generate resonance energy in the resonance operation coil 21, the resonance energy is magnetically coupled from the resonance operation coil 21 to the X-axis toroidal coils X1, X2, ..., XN to return the pen pressure detection magnetic field. At the same time, the signals can be exchanged as close as possible to the Y-axis toroidal coils Y1, Y2, ..., YM and the X-axis toroidal coils X1, X2, ..., XN (and thus with a very simple configuration).

The pressure detecting metal slider 16, the support shaft 17, and the pressing spring 22 are disposed at a position close to the rear end surface of the resonant operation coil 21, so that the resonant circuit mechanism portion 11 including these is configured to be integrated The front end portion 2A of the electronic pen 1.

In the above-described configuration, in the reset state, the detection metal slider 16 is pressed, and since the displacement pressure is not received from the pressing spring 22, the front end surface of the pressing detection metal slider 16 is brought into contact with the resonance operation coil 21. In the state of the rear end surface, it is positioned in the state of the position of the annular step portion 15A of the inner casing 15.

In the reset state, the user holds the electronic pen 1 while When the nib member 3 is pressed against the display surface Q5 of the flat panel display portion Q1 to be pressed, when the nib member 3 is moved rearward, the pressing detection metal slider 16 is moved rearward by the pressing shaft 12, and the rear end surface is utilized. The pressing spring 22 is compressed so that the position of the front end surface of the pressing detecting metal slider 16 is moved rearward from the reset state positioned in the annular step portion 15A, so that the front end surface of the pressing detecting metal slider 16 is harmoniously vibrated. The interval between the rear end faces of the coil 21 is widened by the amount of movement.

In this case, when the relationship between the resonant operation coil 21 functioning as an electrical circuit element and the pressure detecting metal slider 16 made of a non-magnetic metal material is considered, the cylindrical resonant operation coil 21 is used. The center axis direction of the contact detecting metal slider 16 made of a disk-shaped non-magnetic metal material having substantially the same diameter is in contact with or close to each other, so that the pressure detecting metal slider 16 is provided and arranged for the resonance operation coil 21 In the case of the operation of the secondary coil, the inductance value L and the Q value of the resonance operation coil 21 are changed according to the change state of the proximity distance of the press detection metal slider 16, and as a result, the resonance is generated. The inductance values L and Q inherent to the working coil 21 are lowered due to the proximity or contact of the press detecting metal slider 16.

The amount of change in the inductance values L and Q of the resonance operation coil 21 at this time changes depending on the separation distance between the rear end surface of the resonance operation coil 21 and the front end surface of the pressure detecting metal slider 16.

In the case of the present embodiment, the inductance value L and the Q value of the resonance operation coil 21 are changed as shown in Fig. 3, and the inductance lead-out lines 21A and 21B connected to both ends of the resonance operation coil 21 are connected. The electrical signal processing unit 40 provided to the rear end portion 2B of the casing 2 of the electronic pen 1 is handled as a change in electrical signals.

In the electric signal processing unit 40 of FIG. 3, when the nib member 3 of the electronic pen 1 is pressed to the flat panel display portion Q1 (FIG. 1) to be pressed, the Y-axis control unit Q7 is used based on the input driving period. The input drive pulse signals supplied to the Y-axis toroidal coils Y1, Y2, ..., YM are sequentially supplied, and the magnetic field of the repetition frequency of the input drive pulse signal is transmitted from the flat panel display portion Q1, and the pressed position from the flat display panel portion Q1. The magnetic field of the Y-axis toroidal coils Y1, Y2, ..., YM in the vicinity intersects with the resonant operation coil 21, so that the resonance operation coil 21 obtains resonance energy, and the resonance current flows through the inductance extraction lines 21A and 21B to the capacitor for resonance operation. 25-1, 25-2, ..., 25-m resonant circuit 40A connected in parallel.

At this time, the resonance current flowing to the resonance circuit 40A is stored as the resonance energy having the resonance frequency determined by the inductance value of the resonance operation coil 21 and the resonance capacitance of the capacitors 25-1 to 25-6. This resonance energy is returned from the resonance operation coil 21 as a magnetic field of a resonance frequency to the X-axis toroidal coils X1, X2, ..., XN in the vicinity of the pressing position of the flat panel display portion Q1 to be pressed.

In this manner, the flat display panel portion Q1 sends the resonance energy sent from the electronic pen 1 to the central processing unit Q2 as the exchange information Q3, so that the designation designated by the electronic pen 1 included in the returned resonance energy can be taken out. Location information, and pen pressure information as a change in induced voltage.

In the case of the present embodiment, the resonance operation capacitors 21-1 to 25-m constituting the resonance circuit 40A are determined so that the pen pressure is A plurality of fixed capacitors and variable capacitors are prepared in the resonant frequency of the resonant circuit 40A in the reset state of 0, and capacitance values corresponding to the structural portions of the electrical circuit elements in the casing 2 are set.

In the induced voltage obtained in this manner, the output voltage value becomes the highest when the electronic pen 1 is pressed to the coordinate position of the flat display panel portion Q1 to be pressed, so that the central processing unit Q2 can obtain the interpolation calculation. The pressed coordinate value of the electronic pen 1.

However, at this time, the resonance current generated in the resonance circuit 40A of the electronic pen 1 is fixed with respect to the capacitance values of the resonance operation capacitors 25-1 to 25-6, and the inductance value L of the resonance operation coil 21 is matched. The pen pressure of the nib member 3 of the pressing object is changed so that the resonance frequency changes to a value corresponding to the pen pressure.

The change in the resonant frequency of the resonant circuit 40A is such that the frequency of the input drive pulse signal given from the Y-axis control unit Q7 of the flat panel display unit Q1 is slightly changed, and the central processing unit Q2 is taken in via the X-axis control unit Q6. The phase of the induced voltage is shifted in such a manner that the phase of the resonance frequency of the resonance circuit 40A corresponding to the electronic pen 1 is shifted in response to the variation of the pen pressure for the nib member 3, and this change is taken as the pen pressure detection information. The central processing unit Q2 is entered.

In the case of the present embodiment, the resonance frequency of the resonance circuit 40A of the electronic pen 1 is selected in advance in a reset state in which the nib member 3 is not pressed to the flat panel display portion Q1, and from the Y-axis toroidal coils Y1, Y2. The frequency at which the frequency of the input drive pulse signal given by YM is the same.

Therefore, when the electronic pen 1 is not pressed to the reset state of the flat panel display unit Q1, the central processing unit Q2 detects the use of the electronic pen by obtaining an induced voltage of the frequency of the input drive pulse signal given from the Y-axis control unit Q7. 1 and the designated coordinate position, since the resonance frequency of the resonance circuit 40A of the electronic pen 1 coincides with the frequency of the input drive pulse signal, so that the phase shift does not occur, the central processing unit Q2 can determine that the pen pressure is 0 reset state.

On the other hand, when the nib member 3 of the electronic pen 1 is pressed against the flat panel display portion Q1 and pressed into the casing 2 on the central axis L1 of the electronic pen 1, the pressing detection metal slider 16 is rearward via the pressing shaft 12. Moving so that the distance between the front end surface of the pressing detection metal slider 16 and the rear end surface of the resonance vibration coil 21 is expanded from the reset position of the contact, so that the inductance value L of the resonance operation coil 21 is lowered in the resonance circuit 40A, and as a result, The resonant frequency of the resonant circuit 40A changes.

The change in the resonance frequency of the resonance circuit 40A of the electronic pen 1 is detected by the central processing unit Q2 as a change with respect to the phase of the input drive pulse signal, so that the central processing unit Q2 can obtain a change corresponding to the phase. The pen pressure value.

According to the above configuration, since the inductance value L of the resonance operation coil 21 in the resonance circuit 40A of the electronic pen 1 is changed in response to the pen pressure for the nib member 3, it is possible to detect the electronic pen 1 for the flat panel display. The pen pressure of the plate portion Q1.

In this way, the metal slider 16 for detecting the pressure of the component used to obtain the detection output corresponding to the writing pressure is non-magnetic and good. The plate-shaped material of the conductive metal material is configured to realize an electronic pen which is strong against external impact as a metal material and which is easy to process as a member in a pen-shaped casing.

(2) Pen pressure detecting mechanism using non-magnetic, good conductive metal material

In the case of the first embodiment, the resonant circuit mechanism portion 11 for detecting the writing pressure of the pen point member 3 to the flat display panel portion Q1 to be pressed is made of a non-magnetic or a good aluminum or brass material. The conductive or plate-shaped non-magnetic material is such that the ferrite material is not used as it is conventionally, and the resonance frequency of the electronic pen 1 is changed based on the following confirmation.

(2-1) In the present embodiment, in order to change the inductance value L of the resonant operation coil 21, the material made of a metal material is brought into contact or close to each other, and in principle, the resonance energy is lost, and the resonance operation is determined. The inductance value of the resonance frequency of the coil 21 and the Q value indicating the sensitivity of the resonance system are lowered. Therefore, it can be considered that "the material is generally not suitable as a material for controlling the resonance operation", and the metal pen is not used in the conventional electronic pen. Instead, use a ferrite member.

(2-2) In the above-described embodiment, the rear end surface of the cylindrical resonant operation coil 21 is pressed by a non-magnetic material or a good conductor metal plate having an outer diameter shape of substantially the same size. Detecting that the metal slider 16 is in contact with or close to the direction of the central axis, thereby producing the non- The magnetic metal plate acts as a secondary coil to reduce the inductance value and the Q value of the resonant operation coil and to change the resonance frequency of the resonant operation coil.

In the case where the metal plate is formed of a ferrite wafer of a magnetic material, the manner in which the change in the writing pressure detection characteristics differs depending on the frequency used, and the inductance value may decrease and may increase. Therefore, it is not used in this embodiment.

(2-3) As the press-sensing metal slider 16, for example, aluminum or brass as described above is a non-magnetic material and has a high conductivity.

(2-4) As the outer diameter of the press-detecting metal slider 16 is larger, the change in the inductance value L of the resonant operation coil 21 with respect to the load (ie, the writing pressure) of the nib member 3 is larger, but the practical press detection is performed. The size of the metal slider 16 is preferably from the outer diameter shape of the resonant operation coil 21 to about 80%.

(2-5) The thickness of the press-detecting metal slider 16 is such that the thickness becomes a degree of decrease in conductivity (for example, 0.1 [mm] or less) due to the influence on the change characteristic of the inductance value L with respect to the writing pressure. ) does not occur before, so it can be applied up to 0.1 [mm].

On the other hand, even if the thickness of the press detecting metal slider 16 is increased, the change in the load F (ie, the pen pressure) harmonic vibration applying coil 21 with respect to the inductance value characteristic hardly exists.

(2-6) According to the above conditions (2-1) to (2-5), it is confirmed that the decrease in the inductance value L of the resonant operation coil 21 with respect to the change in the writing pressure is based on the press detection of the metal slider 16 A sufficient change can be obtained in the position and size range, and the decrease in the Q value of the resonance operation coil 21 (and thus the decrease in sensitivity) is limited to the extent of the position and size of the press detection metal slider 16 The reduction.

As a result, in the information processing system Q4, the change in the inductance value L of the resonant operation coil 21 can be practically sufficiently changed within the range of the position and the size of the press detection metal slider 16.

In this way, it is confirmed that the X-axis toroidal coils X1 and X2 from the flat panel display portion Q1 are used as the pressing strength (ie, the writing pressure) of the flat panel display panel portion Q1 as the pressing target by the electronic pen 1 as a whole. In the exchange information Q3 obtained by XN, the fluctuation of the signal level that can be determined by the central processing unit Q2 is reduced to a certain extent, and a practically sufficient pen pressure detection effect can be obtained.

(2-7) Therefore, as the press-sensing metal slider 16, a thin metal material (which may be a plate-shaped product or a solid-shaped product as a cutter) which is generally obtained to a degree of about 0.5 [mm] is used. The resonant circuit mechanism portion 11 of the electronic pen 1 is realized.

(3) Other embodiments

(3-1) Fig. 6 is a diagram showing another embodiment of the electronic pen 1, and the same reference numeral is attached to the corresponding portion of Fig. 2, and the pressing of the pen pressure responding portion 11A constituting the resonant circuit mechanism portion 11 is shown. The spring 22 is constituted by two pressing spring members 22A and 22B whose spring constants are different from each other.

In the case of the present embodiment, the pressing spring member 22A that is in contact with the pressing detection metal slider 16 is configured by a coil spring having a small wire diameter, so that the spring constant is small, so that the tip member 3 is pressed. When the flat panel display plate portion Q1 of the object receives the load rearward, the spring member 22A is mainly pressed in the range of the load F (ie, the pen pressure) to perform the displacement operation so that the load F (pen pressure) can be presented. The spring characteristic (as shown in FIG. 5(A)) in which the displacement amount δ changes abruptly changes, and when the load F (pen pressure) becomes large, the pressing spring member 22B having a large main spring constant is displaced. The action is such that the spring characteristic that the displacement amount δ is slowly changed with respect to the change in the writing pressure is presented.

Thus, according to the configuration of FIG. 6, the change in the inductance value L of the resonant action coil 21 with respect to the change in the load F (ie, the pen pressure) can be easily realized, as described above with respect to FIG. 5(C), for the electronic pen 1 Pen down characteristics.

In the case of the electronic pen 1 in the case of FIG. 6, when the writing pressure is maximum, the resonance frequency of the resonance circuit mechanism unit 11 is minimized (at this time, the inductance L of the resonance operation coil 21 becomes maximum), and at the same time, The Q value of the resonant operation coil 21 also becomes maximum.

It can be confirmed that the pulse signal is driven with respect to the input of the magnetic field generated from the flat panel display portion Q1 with respect to the resonance frequency of the electronic pen 1. The frequency is set such that the pen pressure is maximized at a slightly lower frequency, so that the electronic pen 1 can detect a pen pressure change of an appropriate pen pressure range.

In the case of the embodiment of FIG. 6, the resonant operation coil 21 is wound around a cylindrical coil core 21C made of a non-magnetic synthetic resin material, and the elastic detecting force of the pressing spring 22 is used to cause the pressing detection metal slider 16 to be pressed. The front end surface abuts against the rear end surface of the coil core 21C so that the front end surface of the press detecting metal slider 16 does not have the resonance operation coil 21 when the writing pressure to the nib member 3 is zero. The rear end face is in contact, but is in a state close to the position at which the protruding distance of the coil core 21 is separated.

(3-2) FIG. 7 is a diagram showing another embodiment of the electric signal processing unit 40, and the same symbol is attached to the corresponding portion of FIG. 3, and the resonance frequency switching circuit 40B is connected to the resonance circuit 40A. The end position of the resonant operation capacitors 25-1 to 25-m.

The resonance frequency switching circuit 40B has a configuration in which a parallel circuit of the fixed capacitor 51A and the semi-fixed capacitor 51B is connected to the resonance circuit 40A via the changeover switch 52.

By turning on the changeover switch 52, the resonance frequency of the resonant circuit 40A due to the inductance value L of the resonant operation coil 21 and the capacitance value of the capacitors 25-1 to 25-m can be changed to include a fixed capacitor. The resonance frequency of the capacitance value of the 51A and the semi-fixed capacitor 51B is such that the electronic pen 1 can realize the electronic pen 1 which can select an appropriate resonance frequency depending on the application.

(3-3) In the electronic pen 1 of Fig. 6, the press detecting metal slider 16 is configured to be in contact with the coil core 21C of the resonant operation coil 21, but instead of the rear end face of the coil core 21C and the press detecting metal A film or a foam material of, for example, about 0.1 [mm] is inserted between the sliders 16 so that, as an internal structure of the electronic pen 1, an electronic pen which can effectively absorb the impact even if an impact is given to the electronic pen 1 from the outside can be realized.

(3-4) In the electric signal processing unit 40 of Fig. 3, the resonance frequency of the resonance circuit 40A is set in a state where the resonance frequency of the resonance circuit 40A is 0 in the pen pressure for the nib member 3.

In such a case, when the pen pressure is applied to the electronic pen 1, the inductance value of the resonance operation coil 21 is changed to change the resonance frequency of the resonance circuit 40A, so that the pen pressure can be detected in the central processing unit Q2. However, at this time, the resonance frequency when the pen pressure is 0 is set in the resonance circuit 40A, so that the fluctuation of the signal level transmitted by the central processing unit Q2 is made small, so that the detection accuracy of the pen pressure in the central processing unit Q2 can be maintained at High state.

Further, in the case of using the resonance circuit 40A of the configuration of FIG. 3, the frequency of the input drive pulse signal in the flat panel display portion Q1 is fixed, so that the inductance value L of the resonance operation coil 21 changes depending on the change in the pen pressure. Then, the resonance frequency deviates from the frequency of the input drive pulse signal of the flat panel display portion Q1, so that the level of the detection signal given from the electronic pen 1 to the central processing unit Q2 fluctuates.

However, if the resonance frequency of the resonance circuit 40A is set in a state where the writing pressure is 0, the fluctuation of the signal level when the writing pressure is varied from 0 can be reduced.

(3-5) In the above embodiment, the case where the press-detecting metal slider 16 is made of aluminum or brass material is described, but instead of this, the following material may be used: (3-5-1) as a non- Magnetic metal, using copper, aluminum, gold, silver, zinc, tin, lead, magnesium, titanium; (3-5-2) as a metal alloy, using brass, bronze, solder, nickel-chromium alloy (Nichrome, registered (trademark), a conductive resin synthesized with the above-mentioned fine metal wires (filler), a conductive adhesive; (3-5-3) as a carbon-based conductive material, graphite (plate, sheet); (3-5-4) As a material for coating or coating a conductive material, a conductive resin, a conductive film, a conductive polymer material, or a conductive polymer is used.

[Industrial Applicability]

The electronic pen according to the present invention can be used in the case of detecting the pen pressure when the electronic pen is pressed against the image plane.

1‧‧‧Electronic pen

2‧‧‧Shell

2A‧‧‧ front end

3‧‧‧ nib members

11‧‧‧Resonance Circuit Mechanism Department

11A‧‧‧ Pen Pressure Response Department

12‧‧‧Pressing shaft

13‧‧‧Open hole

14‧‧‧Outside shell

14A‧‧‧ next door

15‧‧‧ inside shell

15A‧‧‧Ring-like steps

15B‧‧‧Ring-shaped rear step

16‧‧‧Press detection metal slider

16A‧‧‧ fitting holes

17‧‧‧Support shaft

18‧‧‧ Guide hole

21‧‧‧Resonance action coil

22‧‧‧ Pressing spring

L1‧‧‧ central axis

Claims (6)

An electronic pen that presses a nib member provided at a tip end of a pen-shaped housing made of a non-magnetic material to a pressing object that generates a magnetic field of an input driving signal, thereby obtaining an electronic transmission information generated inside, characterized in that: a pressing shaft that slides from the front toward the rear on the central axis of the housing together with the nib member when the nib member is pressed against the pressing member; a plate-shaped pressing detecting metal slider is disposed at the center The position of the end surface of the pressing shaft on the axis is made of a non-magnetic, good-conductivity metal material; the resonant operation coil is disposed so that the rear end surface of the nib member in the front end portion of the housing and the pressing detection a front end portion of the casing between the front end faces of the metal sliders, wherein the pressing shaft penetrates to move freely; a resonance operation capacitor performs a resonance operation together with the resonance operation coil; and a resonance circuit is disposed in the casing And generating an inductance value according to the resonant operation coil and the resonant operation power as the electron transfer information a resonance current of a resonance frequency determined by a capacitance value of the device, and causing the resonance current to flow into the resonance operation coil; and when the nib member is pressed to the pressing target, the pressing detection metal slider is caused to be based on the nib member The pen pressure moves from the foregoing The rear end surface of the resonant operation coil is separated rearward, and the inductance value of the resonant operation coil is changed, and the resonance frequency of the resonant current is changed in accordance with the writing pressure. The electronic pen according to the first aspect of the invention, wherein the pen pressure detecting magnetic field generated by the resonant current flowing in the resonant operating coil by the resonant current changed by the writing pressure is returned to the pressing target. The electronic pen according to the first aspect of the invention, wherein the pressing detection metal slider is moved in accordance with the movement of the writing pressure, and an inductance value is generated in response to a change in the writing pressure at an initial stage of the pressing operation. Change dramatically. The electronic pen according to claim 3, wherein the press detecting metal slider is provided with a movement of the pressing shaft on a rear side of the press detecting metal slider in order to cause an abrupt change in the inductance value. A spring-loaded compression spring that is characterized by control. The electronic pen according to claim 1, wherein the resonance frequency of the resonant current generated in the resonant circuit is set to be the largest when the writing pressure is maximum, and the inductance value of the resonant operating coil is set. And the capacitance value of the aforementioned resonant operation capacitor. An electronic pen according to claim 1, wherein the resonance frequency of the resonance current generated in the resonance circuit is set under the condition that the pen pressure is 0.