CN113534984B

CN113534984B - Handwriting pen

Info

Publication number: CN113534984B
Application number: CN202110816740.2A
Authority: CN
Inventors: 汤佶; 徐力钧
Original assignee: Shenzhen Huion Animation Technology Co Ltd
Current assignee: Shenzhen Huewang Trend Technology Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2023-06-13
Anticipated expiration: 2041-07-20
Also published as: CN113534984A

Abstract

The invention provides a handwriting pen which comprises a pen core, a capacitor, a substrate, a conductive support, a conductive spring and an elastic conductor. The capacitance value of the capacitor changes along with the pressure applied by the pen refill, and the capacitor is fixed on the substrate and is mutually conducted. The conductive spring is clamped between the conductive support and the elastic conductor, and the initial distance between the capacitor and the elastic conductor is kept. The elastic conductor transmits the pressure born by the pen core to the conductive spring, the conductive spring reciprocates, the contact area of the elastic conductor and the capacitor is changed, and the capacitance value of the capacitor is changed. The handwriting pen has the advantages of simple structure, convenient manufacture, convenient assembly, convenient maintenance, sensitivity, reliability and good stability.

Description

Handwriting pen

Technical Field

The invention relates to the technical field of computer peripheral equipment, in particular to a handwriting pen.

Background

The digital electronic information device has a track input function, and the implementation of the track input function usually adopts a handwriting input mode. The pressure capacitance handwriting pen as the digital electronic information equipment is widely applied, and can not only input characters through handwriting, but also realize drawing, point control operation and the like.

The ceramic pressure capacitor of the handwriting pen in the prior art needs to lead out the independent leads of the two electrodes to the circuit board for welding and conduction, the leads are thin and long in distance, the manufacture is difficult, the assembly is difficult, the damage is easy, and the reliability is low.

Therefore, it is needed to provide a new pressure capacitance stylus pen to solve the technical problems of difficult manufacturing, difficult assembly, easy damage and low reliability.

Disclosure of Invention

The invention aims to solve the technical problems of complex design and low reliability of the conduction path, and provides the high-voltage power supply circuit which has the advantages of simple structure, convenience in manufacture and assembly, convenience in maintenance, low cost, sensitivity, reliability and good stability.

The utility model provides a handwriting pen, includes refill, electric capacity, base plate, electrically conductive support, electrically conductive spring and elastic conductor, the capacitance value of electric capacity is along with the pressure change that the refill receives, the electric capacity is fixed in the base plate, and switch on each other, electrically conductive spring clamp locates between the electrically conductive support with the elastic conductor keeps the electric capacity with the initial interval of elastic conductor, the elastic conductor will refill receives pressure transfer extremely conductive spring, conductive spring carries out reciprocating motion, change the elastic conductor with the area of contact of electric capacity changes the capacitance value of electric capacity.

Preferably, the capacitor includes a first electrode and a second electrode disposed opposite to each other, and the first electrode is fixed on the substrate.

Preferentially, the conductive support comprises a side wall and a hollow structure, the side wall encloses the hollow structure, one end of the side wall is abutted against one end of the conductive spring, the other end of the side wall is fixedly welded on the substrate, and the capacitor is accommodated in the hollow structure.

Preferentially, the elastic conductor comprises a base and an elastic bulge, the elastic bulge extends from the base towards the capacitor direction, the other end of the conductive spring is in abutting connection with the base and sleeved on the elastic bulge, and the elastic bulge is in intermittent elastic abutting connection with the capacitor.

Preferably, the circuit board is further included, and the substrate is arranged in a manner of abutting against the circuit board and is mutually conducted.

Preferably, the circuit board further comprises a conductive sheet, one end of the conductive sheet is in abutting connection with the circuit board, and the other end of the conductive sheet is in abutting connection with the base.

Preferably, the electric conduction device further comprises a push rod, and the conductive sheet is clamped between the push rod and the base.

Preferably, the device further comprises a fixing support, wherein the fixing support is used for fixedly supporting the substrate and the elastic conductor, the fixing support comprises a first fixing portion, the ejector rod penetrates through the first fixing portion, and the elastic conductor is in butt joint with the first fixing portion.

Preferentially, the fixed support further comprises a second fixed part connected with the first fixed part, the second fixed part comprises an arc-shaped wall and a semi-bottom wall which are connected, the arc-shaped wall is connected with the first fixed part, and the semi-bottom wall is connected with the base plate in a butt mode.

Preferably, the fixing support further comprises a third fixing portion, the third fixing portion is connected with the half bottom wall and the arc-shaped wall, and the third fixing portion is used for fixing the circuit board.

Compared with the prior art, the conductive spring of the handwriting pen integrates three functions, and maintains the initial relative position of the elastic conductor and the first electrode; as a reset element, feeding back the pressure applied by the handwriting pen during writing; has conducting function as a part of conducting lines between the second electrode and the circuit board. Because the conductive spring integrates the three functions, the handwriting pen is simple in structure, convenient to manufacture and assemble and not easy to damage.

Meanwhile, the impedance of a circuit connected to the handwriting pen can be adjusted by selecting springs with different impedances, so that the handwriting pen is high in practicality, convenient to maintain and low in cost.

And the pressure transmitted to the elastic conductor and the conductive spring by the writing end is not transmitted by other middle buffer elements, so that the handwriting pen is more sensitive and reliable.

In addition, the second electrode is conducted to the circuit board through the elastic conductor, the conductive spring and the conductive support, so that the structure is simple, and the conduction reliability is good.

And finally, a conducting circuit of the conducting strip is added, and the double-channel conducting circuit has fault tolerance and further improves the reliability.

Drawings

FIG. 1 is a perspective assembly structure of a stylus according to a first embodiment of the present invention;

FIG. 2 is an exploded perspective view of the stylus of FIG. 1;

FIG. 3 is a cross-sectional view and a partial enlarged view of the stylus of FIG. 1;

FIG. 4 is an exploded cross-sectional view of the core, buffer housing, seat and ejector pin of FIG. 2;

FIG. 5 is an exploded perspective view of the cartridge and ram of FIG. 2;

FIG. 6 is a schematic perspective view and a partially enlarged view of the fixing bracket shown in FIG. 2;

FIG. 7 is an enlarged view of region VII of FIG. 2;

FIG. 8 is an exploded cross-sectional view of the pressure sensing assembly shown in FIG. 2;

fig. 9 is a schematic perspective view of the conductive bracket shown in fig. 2;

fig. 10 is a schematic perspective view of the substrate shown in fig. 2;

FIG. 11 is an exploded perspective view of a stylus according to a second embodiment of the present invention;

fig. 12 is an enlarged view of area XII shown in fig. 11.

Detailed Description

The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

First embodiment

Referring to fig. 1 and fig. 2 in combination, fig. 1 is a perspective assembly structure of a stylus according to a first embodiment of the invention, and fig. 2 is a perspective exploded view of the stylus shown in fig. 1. The stylus 10 comprises a shell 11, a pen core 12, a magnetic core component 13, a fixing component 15, a pressure sensing component 16 and a circuit board 18. The housing 11 has a receiving space (not shown) for receiving the cartridge 12, the magnetic core assembly 13, the fixing assembly 15, the pressure sensing assembly 16 and the circuit board 18.

The housing 11 includes an upper shell 111, a lower shell 113, and a key 115, where the upper shell 111 and the lower shell 113 are fixed together to form the accommodating space, and the key 115 penetrates through a side wall of the lower shell 113 and is disposed in contact with the circuit board 18.

The cartridge 12 includes a writing end 121 and a fixed end 123. The pen core 12 can be replaced by inserting and withdrawing from the writing end 121 of the stylus 10.

Referring to fig. 3 in combination, a cross-sectional view and a partial enlarged view of the stylus of fig. 1 are shown. The refill 12 movably penetrates through the magnetic core assembly 13, and the magnetic core assembly 13 includes a magnetic core 131, an induction coil 133, a buffer ring 135 and a buffer sleeve 137. The refill 12 is movably inserted through the magnetic core 131 and the buffer sheath 137. The induction coil 133 is fixedly wound on the outer surface of the magnetic core 131, and the induction coil 133 is electrically connected with the circuit board 18. The buffer ring 135 is sleeved outside the magnetic core 131 near the writing end 121, and is disposed in contact with the side wall of the lower case 113, and is sandwiched between the magnetic core 131 and the side wall of the lower case 113. The buffer sleeve 137 is sleeved on the magnetic core 131 and is close to the fixed end 123.

In this embodiment, the induction coil 133 is wound to form a double-layer structure. In other embodiments, other winding modes may be provided.

The fixing component 15 is matched with the shell 11 to fix the pen core 12, the magnetic core 131, the pressure sensing component 16 and the circuit board 18. The fixing assembly 15 includes a seat chamber 151, a push rod 153 and a fixing bracket 155. The seat cabin 151 is fixed to the fixing bracket 157, and the ejector rod 153 is clamped between the seat cabin 151 and the fixing bracket 155.

Referring to fig. 3 and 4 in combination, fig. 4 is an exploded cross-sectional view of the core, the buffer housing, the seat and the ejector pin shown in fig. 2. The housing 151 includes a sidewall 1511, an external thread 1512, a partition wall 1513, a fixing groove 1515, and a receiving groove 1517. The external thread 1512 is disposed on an outer surface of the side wall 1511 far from the writing end 121, the partition wall 1513 is formed by extending from the side wall 1511 to a side far from the partition wall 1513, and the partition wall 1513 includes the communication hole 1519. The partition wall 1513 and the side wall 1511 are adjacent to the writing end 121 to form the fixing groove 1515, and the partition wall 1513 and the side wall 1511 are far away from the writing end 121 to form the accommodating groove 1517. The communication hole 1519 communicates with the fixing groove 1515 and the receiving groove 1517.

The magnetic core 131 is sleeved with the buffer sleeve 137, and is fixedly accommodated in the fixing groove 1515. The buffer housing 137 includes a buffer bottom wall 1371, buffer side walls 1373 and a through hole 1375. The buffer bottom wall 1371 is sandwiched between the magnetic core 131 and the partition wall 1513. The buffer sidewall 1373 is sandwiched between the magnetic core 131 and the sidewall 1511. The through hole 1375 penetrates the buffer bottom wall 1371 and corresponds to the communication hole 1519. The fixed end 123 of the cartridge 12 penetrates the through hole 1375.

Referring to fig. 3, 4 and 5, fig. 5 is an exploded perspective view of the seat and the ejector rod shown in fig. 2. The ejector 153 is accommodated in the accommodating groove 1517, and the refill 12 sequentially penetrates the magnetic core 131, the buffer sheath 137, and the communication hole 1519, and is accommodated in the ejector 153. The push rod 153 includes two clamping portions 1531 and a penetrating portion 1535. The fixed end 123 is held by the holding portion 1531. The push rod 153 further includes a limiting ring stage 1533 and a limiting protrusion 1537. The limit collar 1533 is disposed on the side surface of the push rod 153, and the limit protrusion 1537 is formed by extending the side surface of the limit collar 1533 toward the side wall 1511. The sidewall 1511 includes a chute 15111 disposed corresponding to the limit projection 1537. When the stylus 10 is used for writing, the limit protrusion 1535 slides in the sliding groove 15111 along with the pressure applied to the pen core 12, so as to prevent the ejector 153 from rotating.

Referring to fig. 3 and 6 in combination, fig. 6 is a schematic perspective view and a partially enlarged view of the fixing bracket shown in fig. 1. The fixing bracket 155 includes a first fixing portion 1551, a second fixing portion 1553, and a third fixing portion 1555 sequentially connected to each other.

The first securing portion 1551 includes an annular wall 15511, internal threads 15513, a bottom wall 15515, and a lead tube 15517. The internal thread 15513 is disposed on the inner surface of the annular wall 15511 corresponding to the external thread 1512, the internal thread 15513 is screwed with the external thread 1512, and the bottom wall 15515 can prevent the internal thread 15513 from being screwed with the external thread 1512. The lead pipe 15517 extends from the bottom wall 15515 toward the seat box, and the annular wall 15511 is perpendicularly connected to the bottom wall 15515.

The lead pipe 15517 has an inner diameter larger than that of the penetration portion 1535, and the penetration portion 1535 penetrates the lead pipe 15517 and is disposed in contact with the pressure sensitive member 16.

In other embodiments, the lead tube 15517 may be configured as a through hole, and the through portion 1535 extends through the through hole and is disposed in contact with the pressure sensing component 16, as shown.

The second fixing portion 1553 includes an arc wall 15531, a clamping groove 15533, a half bottom wall 15535 and a fixing hole 15537. One end of the arc-shaped wall 15531 is connected with the annular wall 15511, the other end of the arc-shaped wall is connected with the half bottom wall 15535, the clamping grooves 15533 are arranged at the opening end of the arc-shaped wall 15531, the number of the clamping grooves is two, and two sides of the clamping grooves are respectively arranged. The fixing hole 15537 is disposed adjacent to the arc-shaped wall 15531 and the half bottom wall 15535.

The third fixing portion 1555 is used for fixing the circuit board 18, and comprises a semi-annular wall 15551 and a clamping block 15553, the semi-annular wall 15551 is connected with the semi-bottom wall 15535 and the other end of the arc-shaped wall 15531 at the same time, and the clamping block 1553 is arranged at the connection position of the semi-bottom wall 15535 and the semi-annular wall 1551 and is perpendicular to the semi-bottom wall 15535.

Referring to fig. 2, 3 and 7 in combination, fig. 7 is an enlarged view of the area VII shown in fig. 2. The pressure sensing element 16 is sandwiched between the bottom wall 15515 and the half bottom wall 15535. The pressure sensing component 16 includes an elastic conductive body 161, a conductive spring 163, a conductive support 165, a substrate 167, and a capacitor 169. The elastic conductive body 161, the conductive spring 163, the conductive holder 165, and the substrate 167 are sequentially connected.

Referring again to FIG. 8, an exploded cross-sectional view of the pressure sensing assembly of FIG. 2 is shown. The elastic conductive body 161 includes a base 1611 and an elastic protrusion 1613, the elastic protrusion 1613 extends from the base toward the capacitor 169, one side of the base 161 is disposed in contact with the bottom wall 15515 and the penetrating portion 1533 of the push rod 153, and the other side is disposed in contact with the conductive spring 163.

In this embodiment, the elastic conductive body 161 is a silicone conductive body, and in other embodiments, the elastic conductive body 161 may be made of other materials with good elasticity and conductivity.

The conductive spring 163 is sandwiched between the base 1611 and the conductive bracket 165, and sleeved on the elastic protrusion 1613. The conductive spring 163 includes a first end 1631 and a second end 1633. The other side of the base 1611 abuts the first end 1631, and the second end 1633 abuts the conductive support 165.

The conductive bracket 165 includes a sidewall 1651 and a hollow structure 1653, the sidewall 1651 enclosing the hollow structure 1653. The capacitor 169 is received in the hollow structure 1653, and the capacitor 169 and the conductive bracket 165 are insulated from each other.

Referring to fig. 9 in combination, a schematic perspective view of the conductive bracket shown in fig. 2 is shown. The side wall 1651 includes a first connecting wall 16511, a step 16513 and a second connecting wall 16515 that are sequentially connected, the first connecting wall 16511 and the step 16513 are disposed at one end of the side wall 1651, the second connecting wall 16515 is disposed at the other end of the side wall 1651, the first connecting wall 16511 and the second connecting wall 16515 are in transitional connection via the step 16513, the outer diameter of the first connecting wall 16511 is greater than the outer diameter of the second connecting wall 16515, the first connecting wall 16511 is welded and fixed on the substrate 167, the step 16513 and the second end 1633 of the conductive spring 163 are abutted to each other, and meanwhile, the conductive spring 163 is sleeved with the second connecting wall 16515. Thus, the conductive bracket 165 has a supporting and fixing function for the conductive spring 163.

In this embodiment, the conductive support 165 is nickel plated with stainless steel, which has strong electrical conductivity, and in other embodiments, the conductive support 165 is made of a metal material, or other materials with good electrical conductivity and difficult deformation.

Referring to fig. 10 in combination, a schematic perspective view of the substrate shown in fig. 2 is shown. The substrate 167 is disposed in abutment with the bottom half wall 15535, and includes a central pad 1671, a first conductive via (not shown), an annular pad 1673, a second conductive via (not shown), a solder hole 1675, a first fixing protrusion 1677, and a second fixing protrusion 1679. The central pad 1671 and the annular pad 1673 are disposed on the same side surface of the substrate 167 facing the elastic conductor 161 and are insulated from each other, the other surface of the substrate 167 is disposed in contact with the half bottom wall 15535, and the first conducting channel and the second conducting channel are insulated from each other. The capacitor 169 is soldered to the central pad 1673, and the first conductive vias are respectively and simultaneously conductive with the central pad 1673 and a conductive point of the circuit board 18. The first connecting wall 16511 is welded to the annular pad 1673, and the first connecting wall 16511 includes a welding protrusion 165111 corresponding to the welding hole 1675 and extends from the first connecting wall 16511 toward the substrate 167. The second conduction channels are respectively and simultaneously conducted with the annular bonding pad 1673 and another conduction point of the circuit board 18. The first fixing protrusion 1677 is inserted into the fixing hole 15537 of the second fixing part 1553. The second fixing protrusion 1679 is engaged with the fixing bracket 155 to fix the circuit board 18.

The capacitor 169 includes a first electrode 1691 and a second electrode 1693 disposed opposite to each other, the first electrode 1691 is welded and fixed to the central pad 1671, and the second electrode 1693 is intermittently abutted against the elastic protrusion 1613. In this embodiment, the capacitor 169 is a ceramic capacitor.

Referring to fig. 7, the circuit board 18 is in a plate shape, is disposed in abutment with the semi-annular wall 15551, has one end inserted into the two clamping grooves 15533, and includes a first vertical groove 181, a second vertical groove 183, a first conducting point (not shown) and a second conducting point (not shown) that are connected, the first vertical groove 181 is disposed in a direction perpendicular to the second vertical groove 183, the first vertical groove 181 is disposed corresponding to the clamping block 15553, the second vertical groove 183 is disposed corresponding to the substrate 167, the substrate 167 is inserted into the second vertical groove 183, and the circuit board 18 is sandwiched between the semi-annular wall 15551 and the second fixing protrusion 1679. The first conduction point is conducted with the first conduction channel, and the second conduction point is conducted with the second conduction channel.

As another implementation manner of this embodiment, the first connecting wall 16511 is fixed to the annular pad 1631, the welding protrusion 165111 is fixed to the welding hole 1675, and the first electrode 1691 is fixed to the central pad 1673, which may be other fixing manners, for example, fixing manner using conductive silica gel.

When the stylus 10 is used for writing, the writing end 121 is pressed, and the fixing end 123 pushes the push rod 153 to move towards the pressure sensing component 16, and the penetrating part 1535 pushes the elastic conductor 161 to move towards the capacitor 169, and simultaneously compresses the conductive spring 163. When the elastic protrusion 1613 contacts the second electrode 1693, the elastic conductive body 161 is in conduction with the second electrode 1693. The penetrating portion 1535 continues to move toward the pressure sensing element 16, further compresses the conductive spring 163, deforms the elastic protrusion 1613, increases the contact area with the second electrode 1693, and increases the capacitance between the first electrode 1691 and the second electrode 1693 as the contact area increases. When the writing force is reduced, the writing end 121 is subjected to the pressure reduction, the elastic force of the conductive spring 163 is larger than the pressure, the elastic conductive body 161 is pushed to move towards the writing end 121, the contact area between the elastic protrusion 1613 and the second electrode 1693 is reduced until the elastic protrusion 1613 is completely separated, the elastic protrusion 1613 is disconnected from the second electrode 1693, and finally, when the writing end 121 is not subjected to the pressure, the writing end 121 is reset.

The conducting lines between the first electrode 1691 and the circuit board 18 are: the first electrode 1691, the center pad 1671, the first conduction path, and the first conduction point are sequentially turned on.

The conducting lines between the second electrode 1693 and the circuit board 18 are: the second electrode 1693, the elastic conductive body 161, the conductive spring 163, the conductive bracket 165, the annular pad 1673, the second conduction path, and the second conduction point are sequentially conducted.

In comparison with the prior art, the conductive spring 163 of the stylus 10 integrates three functions, maintaining the initial relative positions of the elastic conductive body 161 and the first electrode 1691; as a reset element, feeding back the pressure applied to the writing end 121; has a conducting function as a part of a conducting line between the second electrode 1693 and the circuit board 18. Because the conductive spring 163 integrates the three functions, the handwriting pen 10 has few elements, is convenient to manufacture, has a simple structure, is convenient to assemble and is not easy to damage.

Meanwhile, the impedance of the circuit connected to the stylus 10 can be adjusted by selecting springs with different impedances, so that the stylus is strong in practicality, convenient to maintain and low in cost.

The second electrode 1693 is conducted to the circuit board 18 by the elastic conductive body 161, the conductive spring 163 and the conductive bracket 165, so that the structure is simple and the conduction reliability is good.

In addition, the pressure transmitted from the writing end 121 to the elastic conductive body 161 and the conductive spring 163 is not transmitted through other intermediate buffer elements, and the stylus pen 10 is more sensitive and reliable.

The fixing bracket 155 is integrally formed, the bottom wall 15515 and the half bottom wall 15535 define a maximum distance between the elastic conductive body 161 and the first electrode 1691, and the elastic conductive body 161 and the first electrode 1691 are maintained at an initial relative position by cooperating with the conductive spring, so that the stylus pen 10 has higher reliability and stability.

Again, the magnet material is fragile, the setting of buffer ring 135 with buffer cover 137 prevents that magnetic core 131 from breaking, just buffer ring 135 not set up in magnetic core 131 towards writing end 121's of refill 12 bottom surface makes magnetic core 131 is close to writing end's unsettled setting of tip, and the anti-drop effect is better.

Finally, the circuit board 18 is fixed to the fixing support 155 through the first straight slot 181 and the clamping slot 15533, the substrate 167 is fixed to the fixing support 155 through the second straight slot 183 and the fixing hole 15537, and the fixing support 155, the substrate 167 and the circuit board 18 are mounted and fixed by smart mutual matching relation among the elements, so that the structure is compact and stable.

Second embodiment

Referring to fig. 11 and 12, fig. 11 is an exploded perspective view of a stylus according to a second embodiment of the invention, and fig. 12 is an enlarged view of area XII shown in fig. 11. The present embodiment is substantially the same as the first embodiment, and the stylus 20 includes a housing 21, a pen core 22, a magnetic core assembly 23, a fixing assembly 25, a pressure sensing assembly 26, and a circuit board 28. The pressure sensing component 26 includes an elastic conductive body 261, a conductive spring 263, a conductive bracket 265, a base 267 and a capacitor 269. The only difference is that: the pressure sensing component 26 further includes a conductive sheet 262, and the circuit board 28 further includes a third conducting point 285, where the elastic conductive body 261, the conductive sheet 262, and the third conducting point 285 are sequentially conducted.

The conductive sheet 262 includes a first conductive sheet 2621, a connecting sheet 2623, and a second conductive sheet 2625 sequentially connected to each other, the first conductive sheet 2621 is disposed in contact with the base 2611, and the second conductive sheet 2625 is disposed in contact with the third conductive point 285.

That is, compared to the first embodiment, the second electrode 2693 and the circuit board 28 have a conducting line added as follows: the second electrode 2693, the elastic conductive body 261, the conductive sheet 262, and the third conduction point 285 are sequentially turned on.

Compared with the prior art, the two-channel conducting circuit has fault tolerance, namely, any conducting can be ensured to be successful through the conducting circuit of the conducting spring 263 and the conducting circuit of the conducting strip 262, and the reliability is further improved.

The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.

Claims

1. A stylus pen, comprising:

the pen core is provided with a pen core,

the electric capacity, the electric capacity value is along with the pressure change that the refill receives, its characterized in that, the handwriting pen still includes:

the capacitor is fixed on the substrate and is mutually conducted;

the conductive bracket is fixed on the substrate, is mutually conducted and is fixed on the same side of the substrate as the capacitor, and the capacitor and the conductive bracket are mutually insulated;

the conductive spring is clamped between the conductive support and the elastic conductor, the initial distance between the capacitor and the elastic conductor is kept, the conductive support comprises a side wall and a hollow structure, the side wall encloses the hollow structure, one end of the side wall is abutted against one end of the conductive spring, the other end of the side wall is welded and fixed on the substrate, and the capacitor is accommodated in the hollow structure;

the elastic conductor transmits the pressure born by the pen core to the conductive spring, the conductive spring reciprocates, the contact area of the elastic conductor and the capacitor is changed, and the capacitance value of the capacitor is changed.

2. The stylus of claim 1, wherein the capacitor comprises a first electrode and a second electrode disposed opposite to each other, the first electrode being fixed to the substrate.

3. The stylus of claim 1, wherein the elastic conductive body comprises a base and an elastic protrusion, the elastic protrusion extends from the base towards the capacitor, the other end of the conductive spring is in abutting connection with the base and sleeved on the elastic protrusion, and the elastic protrusion is in intermittent elastic abutting connection with the capacitor.

4. A stylus according to claim 3, further comprising a circuit board, wherein the substrate is disposed in abutment with the circuit board and in conductive communication with each other.

5. The stylus of claim 4, further comprising a conductive sheet disposed in abutting communication with the circuit board at one end and in abutting communication with the base at the other end.

6. The stylus of claim 5, further comprising a stem, the conductive sheet being sandwiched between the stem and the base.

7. The stylus of claim 6, further comprising a fixing bracket for fixedly supporting the substrate and the elastic conductive body, wherein the fixing bracket comprises a first fixing portion, the ejector rod penetrates through the first fixing portion, and the elastic conductive body is abutted to the first fixing portion.

8. The stylus of claim 7, wherein the mounting bracket further comprises a second mounting portion coupled to the first mounting portion, the second mounting portion comprising a curved wall and a semi-bottom wall coupled to the first mounting portion, the curved wall coupled to the first mounting portion, and the semi-bottom wall disposed in abutment with the substrate.

9. The stylus of claim 8, wherein the mounting bracket further comprises a third mounting portion, the third mounting portion being coupled to the bottom half wall and the arcuate wall, the third mounting portion being configured to mount the circuit board.