Touch pen with retractable pen point

Abstract

The utility model provides a stylus with a retractable nib. The stylus comprises a stylus body unit, a stylus core unit and a buffer unit, wherein the stylus body unit defines a stylus opening. The pen body unit comprises a pressure sensor. The pen core unit is provided with a pen point protruding out of the pen opening. The buffering unit comprises a sliding piece connected to the pen core unit, an abutting piece movably arranged on the sliding piece and a buffering elastic piece arranged on the sliding piece. The buffer elastic piece generates an acting force which enables the abutting piece to move towards the pressure sensor. When a user writes on a screen and enables the pen point to bear acting force larger than or equal to the pressure threshold value, the pen core unit and the sliding piece move towards the pressure sensor without being blocked, and part of the pen point retracts into the pen opening. Therefore, a user can clearly perceive the abnormal condition that the touch feedback force disappears instantaneously and stop continuing to apply pressure, so that the screen is prevented from being damaged and is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stylus, in particular to a stylus with retractable pen tip. BACKGROUND

[0002] A conventional stylus comprises a barrel, a pen core arranged in the barrel, a pen tip arranged at one end of the pen core, and a pressure sensing component arranged at the other end of the pen core. The pressure sensing component is used to measure the pressure. When the stylus is used to write on a screen of an electronic device, the stylus will output different signals to the electronic device due to the change of pressure on the pressure sensing component, so as to change the thickness and darkness of ink displayed on the screen.

[0003] Since the pressure sensing component has high precision, it has poor impact resistance. When the stylus falls and the pen tip hits the ground, the impact force on the pen tip is likely to cause damage to the pressure sensing component. Therefore, two stoppers are arranged on the pen core and the barrel respectively. When the pen tip is impacted and the pen core moves towards the barrel, the stoppers will abut against each other, so that the force borne by the pen core will not be transmitted to the pressure sensing component, to avoid damage to the pressure sensing component.

[0004] However, if the stoppers abut against each other due to excessive force during writing, since the pen tip cannot continue to move towards the barrel, the force on the screen will increase rapidly, which is likely to cause damage to the screen. SUMMARY

[0005] The utility model aims at providing a stylus with retractable pen tip, which can improve at least one of the above-mentioned shortcomings.

[0006] The utility model discloses a stylus with retractable pen head, including pen body unit, pen core unit and buffer unit. The pen body unit defines the along axial extension's chamber, and the pen mouth that communicates the chamber and is located the chamber one end, the pen body unit includes setting in the pressure sensor of chamber. The pen core unit movably sets in the chamber and has the pen head that can retractably protrude the pen mouth. The buffer unit includes the slider connected in the pen core unit opposite the pen head one end, movably set in the slider and face the pressure sensor's top resistance piece, and set in the slider and the buffer elastic piece of the top resistance piece elastic resistance. The buffer elastic piece generates the acting force of making the top resistance piece move towards the pressure sensor, the pen head along the axial projection area is less than the pen mouth along the axial projection area, when the pen head bears the acting force less than pressure threshold value, the pen head is located first position and protrudes the pen mouth, the top resistance piece abuts against the pressure sensor and the buffer elastic piece is not further deformed. When the pen head bears the acting force greater than or equal to the pressure threshold value, the pen core unit and the slider are not blocked and move towards the pressure sensor, the pen head's part retracts into the pen mouth and the pen head moves to second position, the buffer elastic piece is forced by the top resistance piece and further compression deformation.

[0007] The utility model discloses a stylus with retractable pen head, the buffer unit still includes first elastic piece and second elastic piece, the first elastic piece elastic resistance in between the slider and the pen body unit and generates the acting force of making the slider move towards the pressure sensor, the second elastic piece elastic resistance in between the slider and the pen body unit and generates the acting force of making the slider move away from the pressure sensor.

[0008] The utility model discloses a stylus with retractable pen head, the pen body unit includes the pen tube module of defining the chamber and the support module in the chamber, the support module defines the chamber between the pen mouth and the pressure sensor, the support module has the first limit piece in the chamber, and the second limit piece in the chamber and between the first limit piece and the pressure sensor, the pen core unit movably sets up in the support module and the slider is in the chamber, the first elastic piece elastic resistance is in between the slider and the first limit piece, and the second elastic piece elastic resistance is in between the slider and the second limit piece.

[0009] The utility model discloses a stylus with retractable pen head, the support module has the head seat and the base that are connected to the head seat and define the chamber, the head seat is located between the base and the pen mouth and forms the through -hole along the axial penetration and the chamber intercommunication, the base has the first limit piece and the second limit piece, and the pen core unit sliding contact passes through the through -hole.

[0010] The utility model discloses a stylus with retractable pen head, first stopper has two along the radial direction of perpendicular the axial direction interval limit block, the slide piece is movably arranged between the limit block.

[0011] The utility model discloses a stylus with retractable pen head, the slide piece has two along the axial direction respectively face the limit block's stop surface.

[0012] The utility model discloses a stylus with retractable pen head, first elastic piece with second elastic piece exerted on the slide piece's force is different, when first elastic piece exerted on the slide piece's force is greater than second elastic piece exerted on the slide piece's force and the pen head is not under pressure, the top resistance piece leans against pressure sensor, when first elastic piece exerted on the slide piece's force is less than second elastic piece exerted on the slide piece's force and the pen head is not under pressure, the slide piece leans against the pen body unit towards the direction of pen mouth.

[0013] The utility model discloses a stylus with retractable pen head, the slide piece has sleeve, the sleeve has the cylinder that defines the cylinder chamber, the convex part that is outwardly convex from the cylinder along the radial direction, and the stop portion that extends from the cylinder along the radial direction to the cylinder chamber, the stop portion defines the opening that is communicated the cylinder chamber, the top resistance piece and the buffer elastic piece are located in the cylinder chamber, first elastic piece is the spring around the cylinder and is bounced between the convex part and the pen body unit, second elastic piece is the spring around the cylinder and is bounced between the convex part and the pen body unit, the top resistance piece has the slider that sets up in the cylinder chamber and is bounced against the stop portion by the buffer elastic piece, and the convex column that extends from the slider to the pressure sensor and protrudes the opening.

[0014] The utility model discloses a stylus with retractable pen head, the slide piece still has the connecting piece, the connecting piece has the first column that is connected in the cylinder chamber and is connected in the cylinder, and the second column that is connected between the first column and the pen core unit, the buffer elastic piece is bounced between the first column and the slider.

[0015] The utility model discloses a stylus with retractable pen head, second stopper defines the perforation that is communicated the chamber and is located between the chamber and the pressure sensor, the slide piece passes through the perforation.

[0016] The utility model discloses a beneficial effect lies in: when the user writes on a screen and makes the pen head bear the force of reaching the pressure threshold by inadvertent overpressure, the pen core unit and the slider can move inward without resistance, make the pen head retract towards the pen mouth, let the user stop continuing to press by the abnormality of the touch pressure feedback force disappearing instantaneously, to avoid the screen being damaged and protect the screen. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the first embodiment of the utility model discloses a retractable pen head's stylus's three-dimensional combination diagram;

[0018] Figure 2 is the first embodiment's incomplete partial three-dimensional exploded view;

[0019] Figure 3 is the first embodiment's incomplete cross-sectional view, shows the first embodiment's a pen head not being pressed and being located at a first position;

[0020] Figure 4 is similar Figure 3 cross-sectional view, shows the pen head being pressed and being located at a second position; and

[0021] Figure 5 is the second embodiment of the utility model discloses a retractable pen head's stylus's cross-sectional view. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings and examples.

[0023] Before the utility model is described in detail, it should be noted that similar components are indicated with the same number in the following description.

[0024] Referring to Figure 1 and Figure 2 , the first embodiment of the utility model discloses a retractable pen head's stylus, including a pen body unit 10, a pen core unit 5, an electrode unit 6 and a buffer unit 7.

[0025] Referring to Figure 2 and Figure 3 , the pen body unit 10 includes a pen tube module 1, a frame 2 arranged in the pen tube module 1, a circuit module 3 located in the pen tube module 1 and arranged in the frame 2, and a support module 4 located in the pen tube module 1 and arranged in the frame 2.

[0026] The pen tube module 1 has a tube body 11 extending along an axial direction X, and a cap 12 defining a chamber 13 extending along the axial direction X together with the tube body 11. The cap 12 defines a mouth 121 communicating with the chamber 13 and located at one end of the chamber 13 along the axial direction X.

[0027] The frame 2 is located in the chamber 13 and has a mounting seat 21, and a ring seat 22 connected to a side of the mounting seat 21 adjacent to the mouth 121 along the axial direction X.

[0028] The circuit module 3 is located in the chamber 13 and includes a circuit board 31 arranged on the mounting seat 21, and a pressure sensor 32 arranged on a side of the circuit board 31 adjacent to the mouth 121 along the axial direction X.

[0029] The support module 4 is arranged in the chamber 13 and located between the pressure sensor 32 and the mouth 121. The support module 4 has a head seat 41 embedded in the ring seat 22, and a base 42 connected to the head seat 41 and penetrating in the ring seat 22.

[0030] The head seat 41 is located between the base 42 and the mouth 121 and forms a through hole 411 extending along the axial direction X.

[0031] The base 42 has a first shell part 421 connected to the head seat 41, a second shell part 422 defining a cavity 43 together with the first shell part 421, and a first limiting part 423 arranged on the first shell part 421 and located in the cavity 43. The cavity 43 communicates with the through hole 411 and is located between the mouth 121 and the pressure sensor 32.

[0032] The first limiting part 423 has two limiting blocks 424 spaced apart along a radial direction perpendicular to the axial direction X and connected to the first shell part 421.

[0033] The first shell part 421 has a first end wall 425 away from the head seat 41 along the axial direction X. The second shell part 422 has a second end wall 426 away from the head seat 41 along the axial direction X. The first end wall 425 and the second end wall 426 together form a second limiting part 427 located between the first limiting part 423 and the pressure sensor 32. The first end wall 425 and the second end wall 426 together define a through hole 44 communicating with the cavity 43 and located between the cavity 43 and the pressure sensor 32. The aperture of the through hole 44 is smaller than the aperture of the cavity 43.

[0034] The pen core unit 5 is movably arranged in the accommodating chamber 13. The pen core unit 5 has a first rod body 51 slidingly contacting through the through hole 411, a second rod body 52 inserted at one end of the first rod body 51, and a pen head 53 arranged at the opposite end of the second rod body 52 from the first rod body 51 and retractably protruding out of the pen mouth 121. The first rod body 51 has a slot 511 formed at one end adjacent to the pen mouth 121 for accommodating the second rod body 52, and an outer threaded section 512 formed on the outer circumferential surface of the end away from the pen mouth 121. The pen head 53 is generally bullet-shaped and has a projection area along the axial direction X smaller than that of the pen mouth 121 along the axial direction X, that is, the pen head 53 can move without being stopped by the pen cover 12.

[0035] The electrode unit 6 is embedded at the side of the head base 41 opposite to the base 42 and surrounds the first rod body 51 and the second rod body 52.

[0036] The buffer unit 7 includes a slider 71 connected at one end of the pen core unit 5 opposite to the pen head 53, a top abutting member 74 movably arranged in the slider 71 and facing the pressure sensor 32, a buffer elastic member 75 arranged in the slider 71 and elastically abutting against the top abutting member 74, a first elastic member 76 elastically abutting between the slider 71 and the pen body unit 10, and a second elastic member 77 elastically abutting between the slider 71 and the pen body unit 10.

[0037] The slider 71 is located in the cavity 43 and has a sleeve 72 and a connecting member 73 connected between the sleeve 72 and the first rod body 51 and movably arranged between the limiting blocks 424.

[0038] The sleeve 72 has a barrel 721 defining a barrel chamber 724, a protrusion 722 protruding outwardly along a radial direction perpendicular to the axial direction X from the barrel 721, and a stopper 723 extending along a radial direction perpendicular to the axial direction X from the barrel 721 towards the barrel chamber 724 and in an annular shape.

[0039] The barrel 721 has a first barrel portion 725 passing through the through hole 44 of the base 42, and a second barrel portion 726 connected between the first barrel portion 725 and the connecting member 73. An inner threaded section 727 is formed on the inner circumferential surface of the second barrel portion 726.

[0040] The protrusion 722 is arranged around the barrel 721 and at the joint of the first barrel portion 725 and the second barrel portion 726. The stop portion 723 is connected to the end of the first barrel portion 725 opposite to the second barrel portion 726 along the axial direction X and defines an opening 728 communicating with the barrel chamber 724. The opening 728 has a smaller diameter than the barrel chamber 724.

[0041] The connecting member 73 has a first column 731 penetrating into the barrel chamber 724 and connected to the second barrel portion 726, and a second column 732 connected between the first column 731 and the first rod 51. Specifically, the first column 731 has an outer threaded section 733 formed on the outer circumferential surface thereof and screwed with the inner threaded section 727 of the second barrel portion 726, the second column 732 has an inner threaded section 734 formed thereon and screwed with the outer threaded section 512 of the first rod 51, and the second column 732 has two stop surfaces 735 formed on the outer circumferential surface thereof and respectively facing the limit blocks 424 along the axial direction X.

[0042] The top abutting member 74 has a slider 741 movably arranged in the barrel chamber 724, and a protruding column 742 extending from the slider 741 towards the pressure sensor 32 and protruding out of the opening 728.

[0043] The buffer elastic member 75 is a spring and is arranged in the barrel chamber 724 and pre-pressed between the first column 731 and the slider 741 to generate a force for moving the top abutting member 74 towards the pressure sensor 32, so that the slider 741 abuts against the stop portion 723 and the protruding column 742 protrudes out of the opening 728.

[0044] The first elastic member 76 is a spring arranged around the barrel 721 and pre-pressed between the slider 71 and the pen body unit 10. Specifically, one end of the first elastic member 76 is pre-pressed against the protrusion 722, and the other end is pre-pressed against the limit blocks 424, so that the first elastic member 76 generates a force for moving the slider 71 towards the pressure sensor 32.

[0045] The second elastic member 77 is a spring arranged around the barrel 721 and pre-pressed between the protrusion 722 and the pen body unit 10. Specifically, one end of the second elastic member 77 is pre-pressed against the protrusion 722, and the other end is pre-pressed against the first end wall 425 and the second end wall 426, so that the second elastic member 77 generates a force for moving the slider 71 away from the pressure sensor 32.

[0046] In the embodiment, the first elastic member 76 and the second elastic member 77 apply different forces to the slider 71. The first elastic member 76 has a larger diameter than the second elastic member 77, and the first elastic member 76 applies a greater force to the slider 71 than the second elastic member 77. Thus, when the pen tip 53 is not pressed, the abutting member 74 abuts against the pressure sensor 32, and the stop surfaces 735 of the connecting member 73 are spaced apart from the limiting blocks 424.

[0047] Specifically, the first elastic member 76 and the second elastic member 77 have a spring force of about 10-80 grams, and the buffer elastic member 75 has a spring force of about 350-400 grams. In the embodiment, the first elastic member 76 has a spring force of 20 grams, and the second elastic member 77 has a spring force of 10 grams. However, the spring force of the buffer elastic member 75, the first elastic member 76, and the second elastic member 77 can be selected according to requirements in other variations of the embodiment to adjust the pre-pressing force of the abutting member 74 against the pressure sensor 32.

[0048] Referring to Figure 3 The configuration of the buffer elastic member 75, the first elastic member 76, and the second elastic member 77 provides a pressure threshold value for preventing the inner movement of the pen barrel unit 5 and the slider 71. When writing is performed and the pen tip 53 bears a force less than the pressure threshold value, the pen tip 53 is located at a first position and protrudes out of the pen opening 121, the abutting member 74 abuts against the pressure sensor 32, and the buffer elastic member 75 is not further deformed.

[0049] Referring to Figure 3 and Figure 4When the tip 53 is subjected to a force greater than or equal to the pressure threshold, the abutting member 74 presses against the pressure sensor 32 and retracts into the barrel chamber 724, the buffer elastic member 75 is further compressed and deformed by the abutting member 74, the barrel unit 5 and the slide 71 can move towards the pressure sensor 32 without being blocked, the first barrel portion 725 further protrudes out of the through hole 44, the protruding portion 722 further compresses the second elastic member 77, the first elastic member 76 is stretched, and part of the tip 53 retracts into the pen opening 121 and the tip 53 moves to a second position. It should be noted that "not blocked" here means that, when the tip 53 is pressed, in addition to the elastic force of the buffer elastic member 75, the first elastic member 76 and the second elastic member 77 applied to the slide 71, the barrel unit 5 and the slide 71 can move towards the pressure sensor 32 without being blocked by other components, thereby retracting the tip 53 towards the pen opening 121.

[0050] Specifically, the pressure threshold is 400 grams, and the general writing pressure is about 150 grams, which is less than the pressure threshold. Therefore, when the user writes on a screen (not shown) of an electronic device (not shown), the tip 53 is located at the first position as shown and the buffer elastic member 75 is not further compressed, and when the user inadvertently applies excessive force to the tip 53 to reach the pressure threshold, the buffer elastic member 75 collapses to retract the tip 53 towards the pen opening 121, so that the user can clearly perceive the abnormality that the touch pressure feedback force instantaneously disappears and stop continuing to press, so as to avoid damaging the screen. Figure 3

[0051] It should be noted that in other variations of the present embodiment, by selecting different specifications of the buffer elastic member 75, the first elastic member 76 and the second elastic member 77, the pressure threshold can also be adjusted to between 350 grams and 400 grams. When the screen is an organic light-emitting diode (OLED), the pressure threshold is preferably 350 grams, and when the screen is a liquid crystal display (LCD), the pressure threshold is preferably 400 grams.

[0052] In the present embodiment, the slide 71 moves towards the pressure sensor 32 after being pre-pressed by the first elastic member 76 and the second elastic member 77, so that the abutting member 74 abuts against the pressure sensor 32. Therefore, when writing causes the tip 53 to be pressed, the pressure detected by the pressure sensor 32 changes immediately, so that the stylus transmits a signal to the electronic device to display ink on the screen, and the touch sensitivity is higher.

[0053] Referring to​Figure 5 The second embodiment of the stylus with retractable nib of the present application. The difference between the second embodiment and the first embodiment is that the first elastic member 76 has a smaller diameter than the second elastic member 77, and the force applied by the first elastic member 76 to the slider 71 is smaller than the force applied by the second elastic member 77 to the slider 71. When the nib 53 is not pressed, the slider 71 abuts against the barrel unit 10 in the direction of the mouth 121, and specifically, the stop surfaces 735 of the connecting member 73 abut against the limit blocks 424, so that a gap d is formed between the convex column 742 of the abutting member 74 and the pressure sensor 32.

[0054] In the present embodiment, when the nib 53 is subjected to a force smaller than a minimum water outlet pressure, the abutting member 74 does not abut against the pressure sensor 32, and thus the pressure detected by the pressure sensor 32 does not change, and no ink is displayed on the screen. When the nib 53 is subjected to a force reaching the minimum water outlet pressure, the abutting member 74 abuts against the pressure sensor 32, and thus ink is displayed on the screen. Specifically, the minimum water outlet pressure is about 10 g to 25 g.

[0055] Therefore, the touch sensitivity of the stylus of the second embodiment is lower than that of the first embodiment, and is suitable for users with lower requirements on touch sensitivity, such as users who draw pictures. Therefore, for different product requirements on touch sensitivity, the present application only needs to select specific specifications of the first elastic member 76 and the second elastic member 77 to control whether the abutting member 74 abuts against the pressure sensor 32, and select a specific specification of the buffer elastic member 75 to control the force with which the abutting member 74 abuts against the pressure sensor 32, so as to adjust the touch sensitivity of the stylus, thereby saving manufacturing procedures and reducing manufacturing cost.

[0056] Since the main difference between the second embodiment and the first embodiment is that the positions of the slider 71 and the abutting member 74 are different when the nib 53 is not pressed, the second embodiment also has the effect that the barrel unit 5 and the slider 71 can move inward without being blocked when the nib 53 is excessively pressed, so that the nib 53 is retracted toward the mouth 121.

[0057] In summary, the utility model discloses a stylus with retractable pen head, the projection area of pen head 53 along the axial X is less than the projection area of pen mouth 121 along the axial X, the buffer elastic part 75 is arranged in the slider 71 and is bounced against the top resistance piece 74, and the pen core unit 5 and the slider 71 can not be blocked and move towards the pressure sensor 32, therefore, when the user inadvertently over-pressurizes and makes the pen head 53 bear the force reaching the pressure threshold, the pen core unit 5 and the slider 71 can not be blocked and move inwards, make the pen head 53 retract towards the pen mouth 121, let the user clearly perceive the abnormality that the touch pressure feedback force disappears instantaneously and stop continuing to press, to avoid the screen being damaged and protect the screen, so it can really achieve the purpose of the utility model.

[0058] The above-mentioned is only the embodiment of the utility model, and cannot limit the range of the utility model, and simple equivalent changes and modifications made according to the utility model claims and the content of the specification still belong to the range covered by the utility model.

Claims

1. A stylus with a retractable tip, characterized in that, include: The pen body unit defines an axially extending chamber and a pen opening communicating with the chamber and located at one end of the chamber. The pen body unit includes a pressure sensor disposed in the chamber. The pen tip unit is movably disposed in the chamber and has a pen tip that can retract and protrude from the pen opening; and The buffer unit includes a slider connected to the end of the pen tip unit opposite to the pen core unit, a pusher movably disposed on the slider and facing the pressure sensor, and a buffer elastic member disposed on the slider and springing against the pusher. The buffer elastic member generates a force that moves the pusher toward the pressure sensor. The projected area of ​​the pen tip along the axial direction is smaller than the projected area of ​​the pen opening along the axial direction. When the pen tip is subjected to a force less than a pressure threshold, the pen tip is in a first position and protrudes from the pen opening. The pusher abuts against the pressure sensor and the buffer elastic member does not deform further. When the pen tip is subjected to a force greater than or equal to the pressure threshold, the pen core unit and the slider move toward the pressure sensor without obstruction. Part of the pen tip retracts into the pen opening and the pen tip moves to a second position. The buffer elastic member is further compressed and deformed by the force exerted by the pusher.

2. The stylus with a retractable tip according to claim 1, characterized in that, The buffer unit further includes a first elastic element and a second elastic element. The first elastic element abuts against the slider and the pen body unit and generates a force that moves the slider toward the pressure sensor. The second elastic element abuts against the slider and the pen body unit and generates a force that moves the slider away from the pressure sensor.

3. The stylus with a retractable tip according to claim 2, characterized in that, The pen body unit includes a pen tube module defining the chamber and a support module located in the chamber. The support module defines a cavity between the pen tip and the pressure sensor. The support module has a first limiting member located in the cavity and a second limiting member located in the cavity and between the first limiting member and the pressure sensor. The pen core unit is movably disposed on the support module and the slider is located in the cavity. The first elastic member springs against the slider and the first limiting member, and the second elastic member springs against the slider and the second limiting member.

4. The stylus with a retractable tip according to claim 3, characterized in that, The support module has a head base and a base connected to the head base and defining the cavity. The head base is located between the base and the pen tip and forms a through hole that runs through the cavity along the axial direction. The base has a first limiting member and a second limiting member. The pen tip unit slides through the through hole.

5. The stylus with a retractable tip according to claim 4, characterized in that, The first limiting member has two limiting blocks that are radially spaced apart along a direction perpendicular to the axis, and the slider is movably disposed between the limiting blocks.

6. The stylus with a retractable tip according to claim 5, characterized in that, The slider has two stopping surfaces that face the limiting block along the axial direction.

7. The stylus with a retractable tip according to claim 2, characterized in that, The forces applied to the slider by the first elastic element and the second elastic element are different. When the force applied to the slider by the first elastic element is greater than the force applied to the slider by the second elastic element and the pen tip is not pressed, the abutment abuts against the pressure sensor. When the force applied to the slider by the first elastic element is less than the force applied to the slider by the second elastic element and the pen tip is not pressed, the slider abuts against the pen body unit in the direction of the pen opening.

8. The stylus with a retractable tip according to claim 2, characterized in that, The slider has a sleeve, the sleeve having a cylindrical body defining a chamber, a protrusion extending radially outward from the cylindrical body, and a stop portion extending radially from the cylindrical body toward the chamber, the stop portion defining an opening communicating with the chamber, the abutment member and the buffer elastic member being located in the chamber, the first elastic member being a spring surrounding the cylindrical body and abutting between the protrusion and the pen body unit, the second elastic member being a spring surrounding the cylindrical body and abutting between the protrusion and the pen body unit, the abutment member having a slider disposed in the chamber and abutting against the stop portion by the buffer elastic member, and a protrusion extending from the slider toward the pressure sensor and protruding out of the opening.

9. The stylus with a retractable tip according to claim 8, characterized in that, The slider also has a connector, which has a first column that passes through the cylinder and is connected to the cylinder body, and a second column that connects the first column and the pen tip unit. The buffer elastic element springs against the first column and the slider.

10. The stylus with a retractable tip according to claim 3, characterized in that, The second limiting member defines a through hole that communicates with the chamber and is located between the chamber and the pressure sensor, through which the slider passes.

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