JP3895648B2 - Pressure sensitive pen - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a kind of pressure-sensitive pen, and more particularly to a structure of a pressure-sensitive wireless pen for a tablet.
[0002]
[Prior art]
Currently, computer input devices widely used include a keyboard and a mouse. With the development of digital science and technology, more and more computer users have used tablets as input devices. The user draws characters and lines on the work area of the tablet, transmits signals to the computer, and the computer decodes them. Specifically, the work area on the tablet provides a writing surface, and captures the relevant information such as the position of the object (pen or mouse), pressure, and keys. A pen-like device was generated for such a digital board. Most existing pen-like devices are either corded or cordless, and the disadvantage of pen-like devices is that they cannot generate lines with different line widths depending on pen pressure differences. is there. In order to overcome this disadvantage, a pressure sensitive pen was finally generated.
[0003]
FIG. 1 is a sectional view of a known pressure-sensitive pen 10. The pressure sensitive pen 10 includes a cylindrical pen shaft 12, a pen core 14, an iron powder core 16, a coil 20, movable magnetic means 18, a spring 22, and a capacitor 24. The pen core 14 is placed in the long axis direction in the pen shaft 12, and the one end portion 13 that comes into contact with the tablet is formed in a conical shape, and it is easy to indicate a specific point position on the tablet. The iron powder core 16 has a perforation at the center, and allows the pen core 14 to slide through. The coil 20 is wound around the iron powder core 16. The movable magnetic means 18 is fixed inside the pen core 14, and it moves with the pen core 14 with respect to the iron powder core 16. The iron powder core 16 is fixed in the pen shaft 12 and does not move. When the pen core 14 end 13 receives the upward pressure of the tablet, the pen core 14 moves upward along the long axis direction of the pen shaft 12 to move the movable magnetic means 18 upward, and the iron powder core 16. And the relative position between the movable magnetic means 18 and thereby the inductance of the coil 20 is modified. The coil 20 and the capacitor 24 of the pressure sensitive pen 10 form a resonance circuit. When there is sensitivity / transmission of the electromagnetic field between the coil 20 and the capacitor 24, this resonance circuit resonates with the coil 20. Thus, when the inductance of the coil 20 is changed, the resonance frequency of the resonance circuit is also changed accordingly, and the change in the resonance pressure can be detected to detect the change in the lower pressure value when writing with the pressure sensitive pen.
[0004]
However, if the pressure sensitive pen 10 is written so as to be inclined with respect to the tablet, the upward pressure direction received by the pen core 14 does not coincide with the major axis direction of the pen shaft 12, thereby 14 is weakened, and the amount of change in the inductance of the coil 20 caused by the movement of the movable magnetic means 18 is reduced accordingly, thereby reducing the pressure sensitive sensitivity of the tablet to the pressure sensitive pen.
[0005]
Under normal circumstances, when a user writes on a tablet using a pressure sensitive pen, a tilt angle is naturally formed between the pressure sensitive pen and the surface of the tablet. In order to solve the drawbacks of the pressure-sensitive pen 10 described above, another type of pressure-sensitive pen having the relatively large area and the movable magnetic means 18 has finally been generated. This is shown in FIG. One end surface of the movable magnetic means 18 faces the fixed iron powder core 16. The predetermined distance between the movable magnetic means 18 and the iron powder core 16 must be accurately controlled in a state where the end 13 of the pen core 14 is not subjected to external force. However, the iron powder core 16 is usually manufactured by a powder metallurgy method, and the tolerance value of the product length cannot be made accurate. Therefore, the predetermined distance between the mobile magnetic means 18 and the iron powder core 16 is It cannot be controlled accurately.
[0006]
For this reason, existing pressure-sensitive pen structures for tablets have been expected to overcome the above-mentioned drawbacks.
[0007]
[Problems to be solved by the invention]
The main object of the present invention is to provide a kind of pressure-sensitive pen, which is a kind of pressure-sensitive electromagnetic pen, and a fixed magnetic body having a coil wound around the outside. ), And a movable magnetic body, and when the pen core of the pressure sensitive pen receives pressure to change the relative position of the fixed magnetic means and the movable magnetic means, the inductance of the coil is changed, Thus, it is assumed that the pressure sensitive pen is configured to change the electromagnetic field frequency emitted by the pressure sensitive pen.
[0008]
Another object of the present invention is to provide a kind of pressure-sensitive pen, which uses an annular spacer in a hollow sleeve to isolate the stationary magnetic means and the movable magnetic means, and the pen core provides external force. Without change, the fixed relative position between the coil wound around the fixed magnetic means and the movable magnetic means can be accurately controlled, and the change in the initial value of the pressure sensitive pen electromagnetic field frequency due to the dimensional tolerance of the magnetic means is formed. It is assumed that the pressure sensitive pen is not to be used.
[0009]
Another object of the present invention is to provide a kind of pressure sensitive pen, which wraps at least one wire directly around a fixed magnetic means to obtain a very good Q value and to provide electromagnetic induction of the coil. In addition, it is assumed that the pressure-sensing pen has a considerably strong capability of electromagnetic emission and thereby makes the tablet below the sensor directly sensitive to the electromagnetic field energy and eliminates the need for extra battery power supply.
[0010]
Yet another object of the present invention is to provide a kind of pressure sensitive pen, which wraps at least one wire directly around a fixed magnetic means so as to obtain a very good Q value, The pen has a considerably strong electromagnetic emission capability, and when the tablet detects a pressure change of the pressure sensitive pen, the signal / noise ratio (S / N ratio) is increased, and the analysis level is increased, thereby the tablet signal It is assumed that this is a pressure-sensitive pen with increased authenticity when converting to pressure.
[0011]
[Means for Solving the Problems]
The invention of claim 1 is a pressure sensitive pen comprising a nib structure, the nib structure being a supporting bone frame, a frame cover is provided at one end, and the frame cover defines one receiving space. The support bone frame;
The elastic means, which is elastic means and is accommodated in the accommodation space;
A hollow sleeve, one end of which is in contact with the frame cover, has an outer surface and an inner surface, an annular spacer is provided in the inner surface, and the hollow sleeve is divided into a first storage chamber and a second storage chamber; and The hollow sleeve, wherein the second storage chamber is formed between the annular spacer and the frame cover;
The first magnetic means, which is a first magnetic means, has a first central bore, and one end of the first magnetic means is fitted and accommodated in the first accommodating chamber and abuts against the annular spacer;
The second magnetic means, which is a second magnetic means, has a second central bore, the second magnetic means is movably accommodated in the second accommodation chamber, and one end abuts against the annular spacer;
A sliding means, movably accommodated in the second storage chamber, comprising a cylindrical main body and an annular means, the annular means enclosing a predetermined position on the outer surface of the cylindrical main body, the sliding means being at the first end; And the second end, the length of the first end is slightly smaller than the length of the second magnetic means, a third storage chamber is formed inside the first end, and the first end is When the sliding means moves in the second housing chamber, the second magnetic means is driven synchronously when the sliding means moves in the second central bore of the magnetic means, and the second end is brought into contact with one end of the elastic means. The sliding means in contact with,
A pen core, penetrating through the first central bore of the first magnetic means and the annular spacer, one end of which is fitted and abutted in the third storage chamber, the pen core;
A coil in which at least one wire is wound, and the coil is fixed at a predetermined position at an end approaching the annular spacer on the outer surface of the first magnetic means;
When the external force acts upward on the pen core, the elastic means is elastic if the slide means and the second magnetic means move upward synchronously and move away from the annular spacer, and the upward external force action on the pen core disappears. Is applied to the slide means, and the slide means and the second magnetic means are in contact with the annular spacer at the same time.
The invention of claim 2 is the pressure sensitive pen according to claim 1, wherein the first magnetic means is a first iron powder core.
The invention of claim 3 is the pressure sensitive pen according to claim 1, wherein the second magnetic means is a second iron powder core.
According to a fourth aspect of the present invention, there is provided the pressure sensitive pen according to the first aspect, wherein the outer surface of the annular means of the slide means is in contact with the inner surface of the hollow sleeve.
The invention of claim 5 is the pressure-sensitive pen according to claim 1,
A pen shaft that houses the nib structure;
A printed circuit board, installed on a support bone frame, comprising an inductance capacitance type resonance circuit, wherein the inductance capacitance type resonance circuit is electrically connected to a coil;
When the external force acts upward on the pen core, the external force passes through the pen core and acts on the slide means, and the slide means and the second magnetic means are moved upward synchronously to compress and deform the elastic means. A pressure-sensitive pen, wherein the relative position of the second magnetic means and the first magnetic means is changed, the inductance of the coil is changed, and thereby the resonance frequency of the inductance capacity resonance circuit is changed. It is said.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a kind of pressure sensitive pen, which comprises a nib structure, which comprises a supporting bone frame, an elastic means, a hollow sleeve, a first magnetic means, a second magnetic means, a sliding means, It includes a pen core and one coil wound with at least one wire. A frame cover is provided at one end of the support bone frame, and this frame cover defines one receiving space. The elastic means is accommodated in this accommodation space. One end of the hollow sleeve abuts the frame cover, which has an outer surface and an inner surface. An annular spacer is provided in the inner surface of the hollow sleeve, the hollow sleeve is divided into a first accommodation chamber and a second accommodation chamber, and a second accommodation chamber is formed between the annular spacer and the frame cover. The first magnetic means has a first central perforation, one end of which is fitted and accommodated in the first accommodating chamber and is in contact with the annular spacer. The second magnetic means comprises a second central bore, which is movably housed in the second housing chamber, and one end abuts the annular spacer. The sliding means is movably accommodated in the second receiving chamber, and comprises a cylindrical main body and an annular means, the annular means enclosing a predetermined position on the outer surface of the cylindrical main body, and the sliding means is connected to the first end. It divides | segments into a 2nd edge part, and the length of a 1st edge part is a little smaller than the length of a 2nd magnetic means. A third storage chamber is formed inside the first end of the slide means, and the first end fits into and penetrates the second central bore of the second magnetic means, and at the same time the slide means moves in the second storage chamber. The second magnetic means is driven. The second end of the slide means is in contact with one end of the elastic means. The pen core passes through the first central bore of the first magnetic means and the annular spacer, and one end of the pen core is fitted into and abuts the third storage chamber. The coil is fixed at a predetermined position at the end of the first magnetic means that approaches the annular spacer on the outer surface. When the external force is applied upward to the pen core, the slide means and the second magnetic means move upward synchronously to be separated from the annular spacer, thereby changing the relative position of the second magnetic means and the first magnetic means, As a result, the electromagnetic field frequency emitted by the pressure sensitive pen is changed. When the upward external force action applied to the pen core disappears, the elastic means applies elasticity to the slide means, and the slide means and the second magnetic means simultaneously contact the annular spacer.
[0013]
【Example】
As shown in FIG. 3, the pressure-sensitive pen 200 of the present invention includes a pen tip structure 201, a pen shaft 202, and a printed board 203. As shown in FIG. 4, the pen shaft 202 comprises a support bone frame 204, elastic means 205, hollow sleeve 206, first magnetic means 207, second magnetic means 208, slide means 209, pen core 210 and at least one wire. 1 coil 211 is provided.
[0014]
As shown in FIGS. 3 to 5, a frame cover 212 is provided at one end of the support bone frame 204. The frame cover 212 defines one accommodation space and accommodates the elastic means 205. The elastic means 205 is a spherical elastic means, for example, a rubber ball. The hollow sleeve 206 has a hollow cylindrical shape, and includes an outer surface 213 and an inner surface 214. One end of the hollow sleeve 206 abuts on the frame cover 212, and a pair of step surfaces 216 is provided at the other end. Are fitted to the pen shaft 202, and the hollow sleeve 206 is held by the pen shaft 202. An annular spacer 215 is provided in the inner surface 214 of the hollow sleeve 206, the hollow sleeve 206 is divided into a first accommodation chamber and a second accommodation chamber, and a second accommodation chamber is formed between the annular spacer 215 and the frame cover 212. Is done. The annular spacer 215 can be formed integrally with the hollow sleeve 206. The first magnetic means 207 has a first central perforation, one end of which is fitted and accommodated in the first accommodation chamber and is in contact with the annular spacer 215. The first magnetic means 207 is fixed in the nib structure 201. The second magnetic means 208 comprises a second central bore, which is movably housed in the second housing chamber, and one end abuts the annular spacer 215. Both the first magnetic means 207 and the second magnetic means 208 are formed of iron powder core, and the length of the first magnetic means 207 is longer than the length of the second magnetic means 208.
[0015]
The sliding means 209 is movably accommodated in the second accommodation chamber. As shown in FIG. 5, the sliding means 209 includes a cylindrical main body and an annular means 217, the annular means 217 surrounds a predetermined position on the outer surface of the cylindrical main body, and the sliding means 209 is connected to the first end. Dividing into a second end. This cylindrical body can be formed integrally with the annular means 217. Preferably, the outer surface of the annular means 217 abuts against the inner surface of the hollow sleeve 206 so that the slide means 209 can slide up and down within the hollow sleeve 206. The length of the first end of the sliding means 209 is slightly smaller than the length of the second magnetic means 208, so that when the first end of the sliding means 209 is inserted into and penetrates the second central bore of the second magnetic means 208. A minute gap is maintained between the first end of the sliding means 209 and the annular spacer 215 of the hollow sleeve 206. This small gap is reserved due to the length tolerance of the second magnetic means 208. That is, the distance between the annular means 217 of the slide means 209 and the annular spacer 215 of the hollow sleeve 206 is slightly larger than the length of the second magnetic means 208, and this distance accommodates the second magnetic means 208 within the allowable length tolerance range. it can. As shown in FIG. 4, a third storage chamber is formed inside the first end of the sliding means 209 and stores one end of the pen core 210. When the sliding means 209 moves in the second storage chamber, the second magnetic means 208 is driven. The second end of the sliding means 209 comes into contact with one end of the elastic means 205.
[0016]
The pen core 210 passes through the first central perforation of the first magnetic means 207 and the annular spacer 215, and one end of the pen core 210 is fitted into and abuts the third storage chamber. The coil 211 is fixed at a predetermined position at the end of the first magnetic means 207 that approaches the annular spacer 215 on the outer surface. In the present invention, a coil 211 formed by winding a plurality of wires is preferably wound on the outer surface of the first magnetic means 207.
[0017]
The printed circuit board 203 is installed on a support bone frame 204, which includes an inductance capacity type resonance circuit, and this inductance capacity type resonance circuit is electrically connected to the coil 211.
[0018]
FIG. 6 is a sectional view of the pressure sensitive pen 200 of the present invention in use. As shown in the drawing, when the pen core 210 writes on the tablet 3, the tablet 3 applies an upward force, and the pen core 210 and the slide means 209 move in synchronization and press the elastic means 205. At this time, the second magnetic means 208 is also moved upward in synchronization with the slide means 209, thereby changing the relative position between the second magnetic means 208 and the first magnetic means 207, thereby reducing the inductance of the coil 211. The greater the upward movement of the second magnetic means 208, the lower the inductance of the coil 211 and the higher the resonant frequency of the resonant circuit. The second magnetic means 208 moves upward, the inductance of the coil 211 is lowered, and the resonance frequency is lowered accordingly. The coil 211 wirelessly emits an electromagnetic field signal of frequency change, causes the tablet 3 to receive, and generates an induced voltage. .
[0019]
When the upward action of the external force on the pen core 210 disappears, the elastic means 205 gives elasticity to the slide means 209, and the slide means 209 and the second magnetic means 208 simultaneously abut against the annular spacer 215. Further, the distance between the first magnetic means 207 and the second magnetic means 208 is determined by the thickness of the annular spacer 215 in a state where the pen core 210 is not subjected to the upward action by the tablet 3, and the first magnetic means 207 is fixed. The product length tolerance values of the means 207 and the second magnetic means 208 do not affect the precise control of the relative position between them. When the pen core 210 receives an upward external force, the frequency output value of the pressure-sensitive pen 200 is fixed.
[0020]
The foregoing is merely a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any modification or alteration in detail that may be made based on the present invention shall belong to the claims of the present invention. To do.
[0021]
【The invention's effect】
The pressure-sensitive pen of the present invention is a kind of pressure-sensitive electromagnetic pen, a fixed magnetic body having a coil wound outside, and a movable magnetic body. When the pressure sensor pen core receives pressure and alters the relative position of the fixed magnetic means and the movable magnetic means, the inductance of the coil is altered, thereby changing the electromagnetic field frequency emitted by the pressure sensitive pen. Change accordingly.
[0022]
The pressure-sensitive pen of the present invention isolates the fixed magnetic means and the movable magnetic means using an annular spacer in the hollow sleeve, and moves with the coil wound around the fixed magnetic means without the pen core receiving external force. The fixed relative position between the magnetic means and the magnetic means can be accurately controlled, and the change in the initial value of the pressure-sensitive pen electromagnetic field frequency due to the dimensional tolerance of the magnetic means is not formed.
[0023]
The pressure-sensitive pen of the present invention winds at least one wire directly around a fixed magnetic means to obtain a very good Q value, so that both the electromagnetic induction and electromagnetic firing capabilities of the coil are considerably increased. This makes the tablet below it directly sensitive to electromagnetic field energy and eliminates the need for extra battery power.
[0024]
The pressure sensitive pen of the present invention has at least one wire wrapped directly around a fixed magnetic means so that a very good Q value can be obtained, the pressure sensitive pen has a considerably strong electromagnetic emission capability, and the tablet is pressure sensitive. When detecting the pressure change of the pen, the signal / noise ratio (S / N ratio) is increased, and the resolution is increased, thereby increasing the truthfulness when the tablet converts the signal into pressure.
[Brief description of the drawings]
FIG. 1 is a cross-sectional structure diagram of a known pressure-sensitive pen.
FIG. 2 is a cross-sectional structure diagram of another known pressure-sensitive pen.
FIG. 3 is a cross-sectional structure diagram of a pressure sensitive pen of the present invention.
4 is a cross-sectional structure diagram of the pressure-sensitive pen of FIG. 3 in a non-use state.
5 is a partially exploded view of the nib structure of FIG.
6 is a cross-sectional structural view of the pressure sensitive pen of FIG. 3 in use.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Pressure sensitive pen 12 Pen axis | shaft 13 Pen core end part 14 Pen core 16 Iron powder core 18 Mobile magnetic means 20 Coil 22 Spring 24 Capacitor 200 Pressure sensitive pen 201 Pen tip structure 202 Pen axis 204 Support bone frame 206 Hollow sleeve 207 First 1 magnetic means 208 second magnetic means 209 slide means 210 pen core 211 coil 212 frame cover 213 outer surface 214 inner surface 215 annular spacer 216 step surface 217 annular means 3 tablet

Claims (5)

In a pressure sensitive pen, it has a nib structure, and the nib structure is
A support bone frame, provided with a frame cover at one end, the frame cover defining one receiving space;
The elastic means, which is elastic means and is accommodated in the accommodation space;
A hollow sleeve, one end of which is in contact with the frame cover, has an outer surface and an inner surface, an annular spacer is provided in the inner surface, and the hollow sleeve is divided into a first storage chamber and a second storage chamber; and The hollow sleeve, wherein the second storage chamber is formed between the annular spacer and the frame cover;
The first magnetic means, which is a first magnetic means, has a first central bore, and one end of the first magnetic means is fitted and accommodated in the first accommodating chamber and abuts against the annular spacer;
The second magnetic means, which is a second magnetic means, has a second central bore, the second magnetic means is movably accommodated in the second accommodation chamber, and one end abuts against the annular spacer;
A sliding means, movably accommodated in the second storage chamber, comprising a cylindrical main body and an annular means, the annular means enclosing a predetermined position on the outer surface of the cylindrical main body, the sliding means being at the first end; And the second end, the length of the first end is slightly smaller than the length of the second magnetic means, a third storage chamber is formed inside the first end, and the first end is When the sliding means moves in the second housing chamber, the second magnetic means is driven synchronously when the sliding means moves in the second central bore of the magnetic means, and the second end is brought into contact with one end of the elastic means. The sliding means in contact with,
A pen core, penetrating through the first central bore of the first magnetic means and the annular spacer, one end of which is fitted and abutted in the third storage chamber, the pen core;
A coil in which at least one wire is wound, and the coil is fixed at a predetermined position at an end approaching the annular spacer on the outer surface of the first magnetic means;
When the external force acts upward on the pen core, the elastic means is elastic if the slide means and the second magnetic means move upward synchronously and move away from the annular spacer, and the upward external force action on the pen core disappears. A pressure-sensitive pen, wherein the slide means and the second magnetic means are in contact with the annular spacer at the same time. 2. The pressure sensitive pen according to claim 1, wherein the first magnetic means is a first iron powder core. 2. The pressure sensitive pen according to claim 1, wherein the second magnetic means is a second iron powder core. 2. The pressure sensitive pen according to claim 1, wherein the outer surface of the annular means of the slide means is in contact with the inner surface of the hollow sleeve. The pressure sensitive pen of claim 1, further comprising:
A pen shaft that houses the nib structure;
A printed circuit board, installed on a support bone frame, comprising an inductance capacitance type resonance circuit, wherein the inductance capacitance type resonance circuit is electrically connected to a coil;
When the external force acts upward on the pen core, the external force passes through the pen core and acts on the slide means, and the slide means and the second magnetic means are moved upward synchronously to compress and deform the elastic means. A pressure-sensitive pen, wherein the relative position of the second magnetic means and the first magnetic means is changed, the inductance of the coil is changed, and thereby the resonance frequency of the inductance capacity resonance circuit is changed. .

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