Stylus pen

Abstract

The present invention relates to a stylus pen and, more specifically, to a stylus pen, which can clearly distinguish between a hover motion, a contact motion and a pen pressure motion, has a simple internal structure, easily detects pen pressure, has relatively little performance change due to assembly deviations, and can reduce manufacturing costs. The stylus pen according to an embodiment of the present invention comprises: an inductor unit; a first elastic member disposed to be spaced from the inductor unit; a core which is disposed to penetrate the inductor unit, and which moves toward the first elastic member by means of an external force acting on one end thereof; and a magnetic body which is disposed between the inductor unit and the first elastic member, and of which the distance from the inductor unit changes in conjunction with that of the core, wherein the first elastic member is compressed by the movement of the core.

Description

stylus pen

[0001] The present invention relates to a stylus pen, and more particularly, to a stylus pen that can clearly distinguish between a hover motion, a contact motion, and a pressure motion, has a simple internal structure, is easy to detect pressure, has relatively little change in performance due to assembly deviation, and can reduce manufacturing costs.

[0002] A stylus pen is a pen-shaped device that allows users to input data by lightly touching the screen, dragging, or clicking. Users use stylus pens for precise touch input.

[0003] Stylus pens can be divided into active stylus pens and passive stylus pens depending on whether they contain batteries and electronic components inside.

[0004] Active stylus pens have the advantage of superior basic performance compared to passive stylus pens and can provide additional functions (pressure, hovering, buttons), but the pen itself is expensive and requires power, so the battery must be charged, so there are not many actual users except for some advanced users.

[0005] Passive styluses offer the advantages of lower cost and battery-free operation compared to active styluses. However, they also suffer from the disadvantage of lacking precise touch recognition. Recently, however, technologies such as inductive resonance (EMR) and capacitive resonance have been proposed to create passive styluses capable of precise touch recognition.

[0006] The EMR method has superior writing / drawing quality, which is the core function of a stylus pen, but it has the disadvantage of being thicker and more expensive because it requires a separate EMR sensor panel and EMR driving IC in addition to the capacitance touch panel.

[0007] The capacitive resonance method uses a general capacitive touch sensor and touch controller IC to improve the performance of the IC without additional cost, thereby supporting pen touch.

[0008] In the EMR method or capacitive resonance method, in order for the touch sensor to more accurately identify the touch by the stylus pen, the amplitude of the resonance signal must be large, so that the frequency of the driving signal transmitted to the stylus pen is almost the same as the resonance frequency of the resonance circuit built into the stylus pen. However, in the conventional EMR method or capacitive resonance method, even if the resonance frequency and the frequency of the driving signal match, the signal transmission attenuation is very large, making signal transmission difficult. As a result, despite the long-term attempts of numerous touch controller IC vendors, no company has yet succeeded in mass production because a sufficient output signal has not been produced.

[0009] Therefore, in order to manufacture an EMR method or capacitive resonance stylus pen that can produce the maximum output signal, the design of the internal resonance circuit and the structure of the pen are very important factors.

[0010] Meanwhile, passive stylus pens using the EMR (Electro-Magnetic Resonance) method transmit electromagnetic signals to a digitizer, which then receives resonant signals from the pen. These digitizers feature densely arranged coils that can induce currents through magnetic signals to receive touch information from the pen. These digitizers, however, are unable to adapt to the miniaturization and thinning of touch input devices, and are therefore not designed flexibly.

[0011] Meanwhile, conventional stylus pens require expensive pressure sensors to detect pen pressure, and it is difficult to measure precise pen pressure.

[0012] The problem to be solved by the present invention is to provide a stylus pen that can clearly distinguish various motions of the stylus pen, such as a hover motion, a contact motion, and a pressure motion.

[0013] Additionally, it provides a stylus pen that can reduce manufacturing costs by reducing the number of internal parts.

[0014] In addition, it provides a stylus pen with relatively little performance variation due to assembly deviation of internal parts.

[0015] A stylus pen according to an embodiment of the present invention comprises: an inductor portion; a first elastic member disposed spaced apart from the inductor portion; a core body disposed through the inductor portion and moving in a lateral direction of the first elastic member by an external force applied to one end thereof; and a magnetic body disposed between the inductor portion and the first elastic member and having a distance between the core body and the inductor portion changed in conjunction with the core body; wherein the first elastic member is compressed by the movement of the core body.

[0016] Here, the first elastic member may be a spring.

[0017] Here, the first elastic member can be placed in a compressed state at least in part.

[0018] Here, a second elastic member is further included that surrounds a portion of the first elastic member and is compressed by movement of the core body, and the second elastic member may be made of a rubber material or a spring.

[0019] Here, the first elastic member may be made of a rubber material.

[0020] Here, a second elastic member is further included that surrounds a portion of the first elastic member and is compressed by movement of the core body, and the second elastic member may be made of a rubber material that is relatively harder than the first elastic member.

[0021] Here, the inductor part, the first elastic member, the magnetic body, and the remaining portion except for one end of the core body are disposed inside the housing; a first fixed member fixedly disposed inside the housing; a second fixed member disposed inside the housing at a predetermined distance from the first fixed member; and a moving member moving in conjunction with the core body between the first fixed member and the second fixed member; wherein the first elastic member is fixedly disposed inside the second fixed member and can be pressed and compressed by the moving member moving in a direction lateral to the second fixed member.

[0022] Here, the first fixing member includes: a first cavity in which the magnetic body is placed; a second cavity in which a part of the inductor portion is placed; and a partition wall disposed between the first cavity and the second cavity and having a through hole through which the core body passes; and the diameter of the through hole of the partition wall may be larger than the diameter of the through hole of the magnetic body.

[0023] Here, the core body has a step formed between the one end and the other end, and based on the step, the thickness of one end side of the core body is thicker than the thickness of the other end side of the core body, and the diameter of the through hole of the inductor part and the through hole of the first fixing member may be larger than the diameter of the through hole of the magnetic body.

[0024] Here, by an external force acting on one side of the core body, the step portion pushes one side of the magnetic body, thereby increasing the distance between the magnetic body and the inductor portion.

[0025] Here, an inner case is further included, which is disposed inside the housing and surrounds the inductor portion, the first fixing member, the movable member, and the second fixing member; wherein the first fixing member and the second fixing member include at least one first protrusion protruding from an outer surface, and the inner case may have a first opening in which the first protrusions of the first fixing member and the second fixing member are disposed.

[0026] Here, the first opening includes a base groove extending along the longitudinal direction of the inner case; and a plurality of extension grooves connected to the base groove and extending in a direction perpendicular to the longitudinal direction of the base groove; and the plurality of extension grooves can be formed at positions corresponding to the first protrusions of the first fixing member and the second fixing member.

[0027] Here, the first fixed member has at least one first groove formed on the outer surface, the movable member has at least one extension portion arranged in the first groove and at least one first groove and a second groove formed on the outer surface, and the second fixed member includes a first extension portion and a second extension portion arranged in the first groove and the second groove of the movable member, respectively, and when the movable member moves, the extension portion of the movable member moves within the first groove of the first fixed member, and the first and second extension portions of the second fixed member can be arranged within the first and second grooves of the movable member.

[0028] Here, the second elastic member may have a groove, the movable member may have a first groove, and the second fixed member may include a first extension portion arranged in the groove of the second elastic member and the first groove of the movable member.

[0029] Here, a capacitor unit including a basic capacitor electrically connected to the inductor unit and a jumping capacitor electrically short-circuited or opened with the basic capacitor; a substrate on which the capacitor unit is mounted; a ring terminal disposed on one side of the movable member between the movable member and the first fixed member and moving in conjunction with the movable member; and a connection terminal disposed on the side surfaces of the movable member and the second fixed member, one end of which is in contact with the ring terminal and the other end of which is connected to a connection pad of the substrate; wherein, when the movable member moves, when the ring terminal is separated from one end of the connection terminal, the basic capacitor and the jumping capacitor can be electrically opened with each other.

[0030] Here, the side surfaces of the movable member and the second fixed member may have a groove in which the connection terminal is arranged.

[0031] Here, the distance between the magnetic body and the inductor part changes due to the movement of the core body, and the inductance value of the inductor part changes according to the change in the distance, and the resonance frequency of a signal emitted to the outside may change according to the change in the inductance value.

[0032] Here, it may include a cover part arranged between the other end of the core body and the movable member; and an elastic body arranged between the cover part and the magnetic body.

[0033] Using a stylus pen according to an embodiment of the present invention has the advantage of being able to clearly distinguish between a hover motion, a contact motion, and a pressure motion.

[0034] Additionally, it has the advantage of reducing manufacturing costs by reducing the number of internal parts.

[0035] Additionally, it has the advantage of relatively little change in performance due to assembly deviation of internal components.

[0036] Additionally, it has the advantage of a simple internal structure.

[0037] In addition, there is an advantage in that the contact motion and pressure motion of the stylus pen can be distinguished by utilizing the change in the distance between the magnetic body and the inductor due to the movement of the core.

[0038] Figure 1 is a perspective view of a stylus pen (100) according to one embodiment of the present invention.

[0039] Fig. 2 is a cross-sectional view of part A of the stylus pen (100) illustrated in Fig. 1.

[0040] Figure 3 (a) is a perspective view for explaining the structure of the inner case (110) and guide part (115) shown in Figure 2, and Figure 3 (b) is a perspective view of only the inner case (110).

[0041] Figure 4 is a perspective view of the case where the inner case (110) shown in (a) of Figure 3 is removed.

[0042] Figures 5 (a) and (b) are perspective views of the first fixing member (130) illustrated in Figures 2 and 4 viewed from various sides.

[0043] Figures 6 (a) and (b) are perspective views of the moving member (170) illustrated in Figures 2 and 4 viewed from various sides.

[0044] Figures 7 (a) and (b) are perspective views of the second fixing member (190) illustrated in Figures 2 and 4 viewed from various sides.

[0045] Figure 8 is a perspective view of some of the configurations shown in Figures 2 and 4 viewed from one side.

[0046] Figures 9 (a) and (b) are perspective views of only some of the configurations shown in Figures 2 and 4.

[0047] Figures 10 (a) to (c) are drawings for explaining the operation of the stylus pen (100) illustrated in Figures 1 to 9.

[0048] Figure 11 (a) is a drawing illustrating an example of a change in the LC value of a resonant circuit according to the operation of Figure 10 (a) to (c).

[0049] Fig. 11 (b) is a graph showing the frequency characteristics in each operating state of Fig. 10 (a) to (c).

[0050] Figures 12 (a) to (c) are drawings for explaining problems caused by assembly deviation of the body (102) during assembly of the stylus pen (100) illustrated in Figures 1 to 10.

[0051] Fig. 13 is a graph showing the change in resonance frequency according to the pressure applied to the core (102) for each of (a) to (c) of Fig. 12.

[0052] Figures 14 (a) to (c) are drawings for explaining problems caused by assembly deviation of the connection terminals (165a, 165b) during assembly of the stylus pen (100) illustrated in Figures 1 to 10.

[0053] Figure 15 is a perspective view of a stylus pen (100') according to another embodiment of the present invention.

[0054] Fig. 16 is a cross-sectional view of part A' of the stylus pen (100') illustrated in Fig. 15.

[0055] Figures 17 (a) and (b) are drawings for explaining the first elastic member (180') illustrated in Figure 16.

[0056] Figures 18 (a) to (c) are drawings for explaining the operation of the stylus pen (100') illustrated in Figures 15 to 17.

[0057] Figures 19 (a) and (b) are drawings showing examples of assembly deviations occurring in the core (102).

[0058] FIG. 20 is a graph showing the change in resonance frequency according to the pressure applied to the core (102) for each of (a) and (b) of FIG. 19.

[0059] The following detailed description of the present invention refers to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention, while different from each other, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention. Furthermore, it should be understood that the positions or arrangements of individual components within each disclosed embodiment may be modified without departing from the spirit and scope of the present invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the present invention is defined only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly described. Like reference numerals in the drawings designate the same or similar functions throughout the several aspects.

[0060] Figure 1 is a perspective view of a stylus pen (100) according to one embodiment of the present invention.

[0061] Referring to FIG. 1, a stylus pen (100) according to one embodiment of the present invention includes a housing (101) and a body (102).

[0062] The housing (101) forms the exterior of the stylus pen (100). The housing (10) has the shape of a pen. The housing (101) may be formed by combining two or more parts, or may be formed integrally as a single part.

[0063] The housing (101) may be made of a non-conductive synthetic resin material.

[0064] The housing (101) may include a first housing (101a) and a second housing (101b). The first housing (101a) and the second housing (101b) may be coupled to each other to form the exterior of the stylus pen (100). Various components are built into the first housing (101a) and the second housing (101b).

[0065] A button portion (109) may be arranged in the housing (101). The button portion (109) may be arranged in the second housing (101b). The button portion (109) may be for performing a specific operation of the stylus pen (100). For example, it may be a button for a cancel operation.

[0066] The core (102) includes one end positioned outside the housing (101), and the remaining part excluding the one end positioned inside the housing (101). A part of the one end position of the core (102) may move inside the housing (101) due to an external force from the outside. As the external force increases, the volume of the part of the one end position of the core (102) that enters the housing (101) may increase. When the applied external force decreases, a part of the one end position of the core (102) comes out of the housing (101) again. When the external force disappears, a part of the one end position of the core (102) returns to its original state.

[0067] Hereinafter, various configurations arranged inside the housing (101) will be described with reference to FIGS. 2 to 8.

[0068] FIG. 2 is a cross-sectional view of part A of the stylus pen (100) illustrated in FIG. 1, (a) of FIG. 3 is a perspective view for explaining the structure of the inner case (110) and the guide part (115) illustrated in FIG. 2, (b) of FIG. 3 is a perspective view of only the inner case (110), FIG. 4 is a perspective view of the case where the inner case (110) illustrated in (a) of FIG. 3 is removed, (a) and (b) of FIG. 5 are perspective views of the first fixing member (130) illustrated in FIG. 2 and FIG. 4 viewed from various sides, (a) and (b) of FIG. 6 are perspective views of the moving member (170) illustrated in FIG. 2 and FIG. 4 viewed from various sides, and (a) and (b) of FIG. 7 are perspective views of the second fixing member (190) illustrated in FIG. 2 and FIG. 4 viewed from various sides, and FIG. 8 is a perspective view of FIG. 2 and FIG. It is a perspective view of some of the configurations shown in Fig. 4 from one side, and (a) and (b) of Fig. 9 are perspective views of only some of the configurations shown in Fig. 2 and Fig. 4.

[0069] Referring to FIG. 2, the stylus pen (100) includes an inner case (110), a guide portion (115), an inductor portion (120), a capacitor portion (not shown), a first fixed member (130), a magnetic body (140), a cover member (150), a ring terminal (161), contact terminals (165a, 165b), a moving member (170), a first elastic member (180), a second elastic member (185), an elastic body (155), a second fixed member (190), and a substrate (210).

[0070] The inner case (110) is made of a non-conductive material and is disposed inside the housing (101). Specifically, the inner case (110) may be disposed inside the first housing (101a) of the housing (101). The inner case (110) may have a shape that surrounds the inductor portion (120), the first fixing member (130), the ferrite chip (140), the cover member (150), the ring terminal (161), the contact terminals (165a, 165b), the movable member (170), the first elastic member (180), the second elastic member (185), the elastic body (155), and the second fixing member (190). The inner case (110) may play a role in protecting various components disposed inside from physical and / or electrical shock.

[0071] Referring to (a) and (b) of FIGS. 2 and 3, the inner case (110) may have a first opening (111) in which a first protrusion (131) of a first fixing member (130) and a first protrusion (192) of a second fixing member (190) are arranged. The first opening (111) may have a base groove (111b) extending in the longitudinal direction of the stylus pen (100), and a plurality of extension grooves (111e) connected to the base groove (111b) and extending in a direction perpendicular to the longitudinal direction of the base groove (111b). The plurality of extension grooves (111e) may be formed at positions corresponding to the plurality of first protrusions (131, 192). As an example, the first opening (111) may have an 'E' shape.

[0072] By rotating the inner case (110) counterclockwise or clockwise about the body (102) as the rotation axis, the plurality of first protrusions (131, 192) can be positioned from the plurality of extension grooves (111e) to the base grooves (111b), or from the base grooves (111b) to the plurality of extension grooves (111e). In particular, by positioning the plurality of first protrusions (131, 192) from the base grooves (111b) to the plurality of extension grooves (111e), the first fixing member (130) and the second fixing member (190) can be fixed in their positions within the inner case (110). Meanwhile, since the movable member (170) is not directly coupled to the inner case (110), it can move in conjunction with the linear reciprocating motion of the body (102) due to an external force between the first fixing member (130) and the second fixing member (190).

[0073] The inner case (110) may have a second opening (113) in which the extension coils (125a, 125b) are arranged and which expose the connection terminals (165a, 165b). The second opening (113) provides a space for arranging the extension coils (125a, 125b) and can protect the extension coils (125a, 125b) from external impact. In addition, the mounting position of the connection terminals (165a, 165b) can be easily confirmed through the second opening (113).

[0074] The guide part (115) can be arranged between the inductor (120) and the housing (101), and between the core (102) and the inner case (110). The guide part (115) has a through hole through which the core (102) passes. The guide part (115) can guide the position of the core (102), stably fix the inductor part (120), and block external electrical or magnetic influences on the inductor part (120). The guide part (115) can be configured separately from the inner case (110), but is not limited thereto, and the guide part (115) can also be configured integrally with the inner case (110).

[0075] Referring to FIGS. 2 and 4, a guide portion (115), an inductor portion (120), a first fixed member (130), a movable member (170), and a second fixed member (190) may be sequentially arranged along the longitudinal direction (hereinafter referred to as “longitudinal direction”) of the stylus pen (100) from one end of the body (102). That is, along the longitudinal direction, the inductor portion (120) may be arranged on the guide portion (115), the first fixed member (130) may be arranged on the inductor portion (120), the movable member (170) may be arranged on the first fixed member (130), and the second fixed member (190) may be arranged on the movable member (170).

[0076] The inductor section (120) includes a ferrite core (121) and a coil section (123) wound around the ferrite core (121). The ferrite core (121) has a through-hole through which a core (102) passes. Through the through-hole, the core (102) can perform a linear reciprocating motion along the longitudinal direction. The coil section (123) may be wound around the ferrite core (123) in at least one layer. Extension coils (125a, 125b) may be connected to both ends of the coil section (123), respectively. The extension coils (125a, 125b) may extend along the longitudinal direction and be connected to coil electrodes (213a, 213b) disposed on the substrate (210), respectively.

[0077] The inductor portion (120) is fixedly installed inside the housing (101). The inductor portion (120) can be fixed between the first fixing member (130) and the guide portion (115) in the longitudinal direction. The inductor portion (120) can be fixed by the inner case (110) in a direction perpendicular to the longitudinal direction (hereinafter referred to as the “vertical direction”).

[0078] The inductor portion (120) may be fixedly arranged on one side of the first fixing member (130). Here, a part of the inductor portion (120) may be arranged in the second cavity (133b) of the first fixing member (130).

[0079] The inductor section (120) can be electrically connected to a capacitor section (not shown) mounted on a substrate (210) to form a resonant circuit section. The resonant frequency can be set by the inductance (L) value of the inductor section (120) and the capacitance (C) value of the capacitor section (not shown). Since the inductance (L) value of the inductor section (120) changes according to the movement of the magnetic body (140), the resonant frequency can be varied.

[0080] A capacitor section (not shown) is placed on a substrate (210). It has a preset capacitance (C) value. The capacitor section (not shown) may include two or more capacitors. At least one of the two or more capacitors may be configured as a circuit in which it is always electrically connected to the inductor section (120) as a basic capacitor.

[0081] The capacitor section (not shown) includes a jumping capacitor (215). The jumping capacitor (215) may be mounted on the substrate (210) and configured in a circuit to be electrically connected to the connection terminals (165a, 165b). For example, the jumping capacitor (215) may be electrically connected to the connection pads (211a, 211b) disposed on the substrate (210) through the conductive patterns (212a, 212b). The jumping capacitor (215) may be electrically connected to or separated from the basic capacitor according to the movement of the core (102). When no external force is applied to the core (102), the ring terminal (161) is in contact with the connection terminals (165a, 165b), so that the jumping capacitor (215) is electrically connected to the basic capacitor. On the other hand, when an external force is applied to the core (102) and the movable member (170) that is linked to the core (102) moves toward the first elastic member (180), the ring terminal (161) is separated from the connection terminal (165a, 165b), and at this time, the jumping capacitor (215) can be electrically separated from the basic capacitor.

[0082] Referring to (a) and (b) of FIGS. 2, 4, and 5, the first fixing member (130) is disposed inside the inner case (110). The first fixing member (130) has an overall cylindrical shape. The first fixing member (130) has a first cavity (133a) and a second cavity (133b). The magnetic body (140) illustrated in FIG. 2 is disposed in the first cavity (133a), and one end of the ferrite core (121) of the inductor portion (120) illustrated in FIG. 2 is disposed in the second cavity (133b). A partition wall (132) is disposed between the first cavity (133a) and the second cavity (133b), and the partition wall (132) has a through hole (132h) through which the core body (102) passes.

[0083] An inductor part (120) is arranged on one side of the first fixing member (130), and a second fixing member (190) is arranged at a predetermined distance from the other side of the first fixing member (130).

[0084] A plurality of the first protrusions (131) described above can be arranged on the outer surface of the first fixed member (130).

[0085] A plurality of first grooves (135) may be formed on the outer surface of the first fixed member (130), in which a plurality of extension portions (171) of the movable member (170) are respectively arranged. In addition, a second groove (137) may be formed on the outer surface of the first fixed member (130) along the longitudinal direction to maintain a certain distance from the extension coils (125a, 125b) illustrated in FIG. 4.

[0086] Referring to (a) and (b) of FIGS. 2, 4, and 6, the movable member (170) is positioned between the first fixed member (130) and the second fixed member (190). The movable member (170) can perform a linear reciprocating motion between the first fixed member (130) and the second fixed member (190) in conjunction with the longitudinal movement of the core (102).

[0087] The movable member (170) is disposed inside the inner case (110). The movable member (170) has an overall cylindrical shape. The movable member (170) has a first cavity (173a) and a second cavity (173b). A part of the first elastic member (180) illustrated in FIG. 2 is disposed in the first cavity (173a), and a part of the cover part (150) illustrated in FIG. 2 is disposed in the second cavity (173b). A partition wall (172) is disposed between the first cavity (173a) and the second cavity (173b), and the partition wall (172) is disposed between the cover part (150) and the first elastic member (180).

[0088] On the outer surface of the movable member (170), a plurality of extension parts (171) are arranged in a plurality of first grooves (135) of the first fixed member (130). The plurality of extension parts (171) have a shape extending along the longitudinal direction and can move along the first grooves (135) of the first fixed member (130).

[0089] A plurality of second grooves (175) may be formed on the outer surface of the movable member (170), in which the second extension portions (193) of the second fixed member (190) illustrated in Fig. 7 are respectively arranged. Since the second grooves (175) also move in conjunction with the linear reciprocating motion of the movable member (170) along the longitudinal direction, the position of the second extension portions (193) of the second fixed member (190) arranged within the second grooves (175) may vary.

[0090] The second groove (175) of the movable member (170) may have a shape corresponding to the second extension (193) of the second fixed member (190). The second groove (175) may have a shape that prevents the second extension (193) of the second fixed member (190) from being completely separated from the second groove (175) when the movable member (170) moves away from the second fixed member (190). To this end, the second groove (175) may have a shape in which the width of the second groove (175) becomes narrower toward the second fixed member (190), and the second extension (193) of the second fixed member (190) may have a shape that protrudes in the width direction of the second groove (175).

[0091] A first groove (177) may be formed on the outer surface of the movable member (170). The first groove (177) is formed to be elongated along the longitudinal direction, and, as illustrated in (b) of FIG. 9, connection terminals (165a, 165b) may be arranged in the first groove (177). The positions of the connection terminals (165a, 165b) may be fixed and guided by the first groove (177). In addition, a first extension (192) of a second fixed member (190) may be arranged together with the connection terminals (165a, 165b) in the first groove (177).

[0092] The movable member (175) is arranged between the first fixed member (130) and the second fixed member (190). Since the extension (171) of the movable member (170) is arranged in the first groove (135) of the first fixed member (130), and the first and second extensions (193, 199) of the second fixed member (190) are arranged in the first and second grooves (175, 177) of the movable member (170), there is an advantage in that the movable member (175) does not come out even when moved frequently.

[0093] The movable member (170) includes one side (179) on which a first cavity (173a) is arranged, and a ring terminal (161) as shown in FIGS. 2 and 8 may be arranged on the one side (179). The shape of the one side (179) may correspond to the shape of the ring terminal (161). The ring terminal (161) arranged on the one side (179) may be guided by the inner surface of one or more extension parts (171) arranged around it.

[0094] Referring to FIGS. 2, 4, and 7, the second fixing member (190) is fixedly positioned inside the housing (101). At least a portion of the second fixing member (190) is fixedly positioned inside the inner case (110).

[0095] The second fixed member (190) includes a cylindrical base portion (191). One side (191a) of the base portion (191) has a cavity (195) in which a portion of the first elastic member (180) illustrated in FIG. 2 is disposed. The second elastic member (185) illustrated in FIG. 2 is disposed on one side (191a) of the base portion (191).

[0096] The second fixed member (190) includes a first extension portion (199) and a second extension portion (193) that extend from one side (191a) of the base portion (191) toward the movable member (170). A plurality of the first extension portions (199) and the second extension portions (193) may be arranged on one side (191a) of the base portion (191). Specifically, two first extension portions (199) may be arranged to face each other, and two second extension portions (193) may be arranged to face each other. The plurality of first and second extension portions (191, 199) may guide the outer surface of the second elastic member (185) illustrated in FIG. 2 from all sides. Therefore, the position of the second elastic member (185) may be fixed by the plurality of first and second extension portions (191, 199).

[0097] The inner surface of the first extension (199) guides the outer surface of the second elastic member (185), and the outer surface of the first extension (199) can support a part of the connection terminal (165a, 165b) illustrated in FIGS. 2 and 4.

[0098] The second extension (193) may have a predetermined shape that prevents it from being detached from the second groove (175) after being coupled to the second groove (175) of the movable member (170). For example, the second extension (193) may have a shape in which at least a portion thereof protrudes, thereby preventing it from being detached from the second groove (175).

[0099] The second fixing member (190) may have a groove (194) formed on the outer surface of the base portion (191). The bottom surface of the groove (194) may be connected to the outer surface of the first extension portion (199) without a separate step. A portion of the connection terminals (165a, 165b) illustrated in FIGS. 2 and 4 may be arranged in the groove (194).

[0100] The second fixing member (190) may include a mounting portion (196) extending along the longitudinal direction from the other surface (not shown) of the base portion (191). The mounting portion (196) may have a cavity (197) in which the substrate (210) illustrated in FIGS. 2 and 4 is placed.

[0101] The second fixing member (190) may have an opening (198) for connecting the connection terminals (165a, 165b) illustrated in FIGS. 2 and 4 to the substrate (210) placed in the cavity (197). The other end of the connection terminals (165a, 165b) may be placed in the opening (198) and connected to the connection pads (211a, 211b) of the substrate (210).

[0102] Referring to (a) and (b) of FIGS. 2, 4, 8, and 9, the core (102) is formed to extend along the longitudinal direction to a predetermined length, and one end may have a pointed shape. Here, the one end is exposed outside the housing (101).

[0103] The core (102) includes a step portion (102T) arranged at a portion of the middle portion between one end and the other end. The thicknesses of one end and the other end of the middle portion may be different based on the step portion (102T). A first thickness (D1) of one end of the middle portion based on the step portion (102T) may be formed thicker than a second thickness (D2) of the other end of the middle portion. Depending on the configuration of the step portion (102T), when the core (102) moves in the longitudinal direction by an external force, the magnetic body (140) may be moved together. That is, when the core (102) moves, the step portion (102T) may push one surface of the magnetic body (140) to move the magnetic body (140) in the longitudinal direction. As the magnetic body (140) moves along the longitudinal direction, the separation distance between the inductor section (120) and the magnetic body (140) changes. The change in the distance changes the inductance (L) value of the inductor section (120), and the change in the inductance value changes the resonant frequency of the stylus pen (100). By detecting the change in the resonant frequency in a stylus pen sensing device that interacts with the stylus pen (100), the writing pressure (pressure) applied to the body (102) can be detected.

[0104] The magnetic body (140) is placed inside the first cavity (133a) of the first fixing member (130) illustrated in FIG. 5 and has a cylindrical shape. In addition, the magnetic body (140) has a through hole through which a portion of the core body (102) passes. The diameter of the through hole may be formed to be equal to or greater than the second thickness (D2) and smaller than the first thickness (D1).

[0105] The magnetic material (140) may be a ferrite chip.

[0106] The magnetic body (140) can move linearly back and forth along the longitudinal direction in conjunction with the core body (102). As the magnetic body (140) moves in conjunction with the core body (102), the inductance (L) value of the inductor section (120) can change.

[0107] A cover part (161) is arranged at the other end of the core (102). The cover part (161) may have a shape that covers the other end of the core (102). For example, the cover part (161) may have a cylindrical shape with different thicknesses at the upper and lower portions.

[0108] An elastic body (155) may be placed between the cover portion (161) and the magnetic body (140). The elastic body (155) may be a spring. One end of the elastic body (155) may be fitted into a part of the cover portion (161), and the other end of the elastic body (155) may be placed so as to contact the magnetic body (140).

[0109] The elastic body (155) may be for correcting the deviation of the magnetic body (140). For example, if the length (or height) of the magnetic body (140) is 0.1 mm shorter than the specification, the elastic body (155) brings the magnetic body (140) into close contact with the partition wall (132) of the first fixing member (130).

[0110] The ring terminal (161) is a hollow circular shape inside and electrically connects two connection terminals (165a, 165b). Here, the shape of the ring terminal (161) is not limited to a circle, and may have a polygonal shape.

[0111] The ring terminal (161) is arranged on one side of the movable member (170) and is linked with the movable member (170). That is, it moves together with the linear reciprocating motion of the movable member (170) in the longitudinal direction.

[0112] The connection terminal (165a, 165b) includes one side that comes into contact with or is separated from the ring terminal (161) and the other side that is connected to the substrate (210). The one side can come into contact with or be separated from the ring terminal (161) by movement of the ring terminal (161) that is linked to the moving member (170). The other side is directly connected to the connection pad (211a, 211b) of the substrate (210) illustrated in FIG. 2 through soldering or the like.

[0113] The connection terminal (165a, 165b) includes a base portion arranged between the one side portion and the other side portion. The base portion may have a shape extending in the longitudinal direction. The base portion is arranged in the first groove (177) of the movable member (170) illustrated in FIG. 6, and in the groove (194) of the second fixed member (190) illustrated in FIG. 7, and may be guided by the first extension portion (199) of the second fixed member (190).

[0114] The first elastic member (180) is positioned within the second fixed member (190). The first elastic member (180) may have an elongated cylindrical shape in the longitudinal direction. The first elastic member (180) may be made of a rubber material.

[0115] The first elastic member (180) may have one end positioned in the cavity (195) of the second fixed member (190) illustrated in FIG. 7, and the other end positioned in the first cavity (173a) of the movable member (170) illustrated in FIG. 6.

[0116] The second elastic member (185) is arranged within the second fixed member (190). The second elastic member (185) may have a flat cylindrical shape. The second elastic member (185) may be made of a rubber material. The second elastic member (185) may be made of a rubber material that is relatively harder than the first elastic member (180). Accordingly, the second elastic member (185) may be made of a hard rubber material, and the first elastic member (180) may be made of a soft rubber material.

[0117] Meanwhile, the second elastic member (185) may be a spring. The second elastic member (185) may be a spring configured to respond to a relatively heavier force than the first elastic member (180).

[0118] The thickness of the second elastic member (185) in the longitudinal direction is thinner than that of the first elastic member (180), and the diameter in the vertical direction is configured to be wider than that of the first elastic member (180).

[0119] The second elastic member (185) is arranged to surround the middle portion of the first elastic member (180). Therefore, the second elastic member (185) has a through hole through which the first elastic member (180) passes.

[0120] The second elastic member (185) may have a groove (185g) that fits into a portion of the first extension (199) of the second fixing member (190), as illustrated in (b) of FIG. 9. Through this, the second elastic member (185) can be stably fixed to the second fixing member (190).

[0121] Hereinafter, the operation of the stylus pen (100) according to one embodiment shown in FIGS. 1 to 9 will be described with reference to FIG. 10.

[0122] FIG. 10 (a) to (c) are drawings for explaining the operation of the stylus pen (100) illustrated in FIGS. 1 to 9. Specifically, FIG. 10 (a) is a drawing showing a hover state (H) of the stylus pen (100), FIG. 10 (b) is a drawing showing a contact state (C) of the stylus pen (100), and FIG. 10 (c) is a drawing showing a pressure (P) state of the stylus pen (100).

[0123] Referring to (a) of Fig. 10, in the hover state (H), no external force is applied to the core (102), so there is no change in the internal configuration. In particular, the ring terminal (161) and the connection terminals (165a, 165b) remain in contact with each other.

[0124] Referring to (b) of Fig. 10, in the contact state (C), a predetermined pressure is applied to one end of the core (102). The core (102) moves inward of the housing (101) due to the applied pressure. As the core (102) moves, the cover (150) pushes the moving member (170) toward the first elastic member (180), so that the ring terminal (161) is separated from the connection terminals (165a, 165b). Accordingly, the jumping capacitor (215) illustrated in Fig. 2 is electrically disconnected from the basic capacitor, so that the overall capacitance of the capacitor portion (not shown) is reduced. Here, since the magnetic body (140) does not move, the inductance value of the inductor portion (120) is maintained as is. Since the overall capacitance value of the capacitor portion (not shown) is reduced, the resonant frequency is changed.

[0125] Referring to (c) of Fig. 10, in the pressure state (P), a greater pressure is applied to one end of the core (102) than in the contact state (C). The greater pressure causes the core (102) to move further inwardly of the housing (101), and accordingly, the magnetic body (140) is pushed by the step portion (102T) of the core (102). As the magnetic body (140) is pushed, the elastic body (155) arranged between the cover portion (150) and the magnetic body (140) is compressed, and the first elastic member (180) and the second elastic member (185) are compressed by the movement of the movable member (170). Here, since the magnetic body (140) moves away from the inductor portion (120), the inductance (L) value of the inductor portion (120) gradually decreases. Here, the capacitance of the capacitor section (not shown) is maintained the same as the contact state (C). Since the inductance value of the inductor section (120) decreases, the resonant frequency changes.

[0126] Fig. 11(a) illustrates, as an example, the change in the LC value of the resonant circuit according to the operations of Fig. 10(a) to (c), the Th section represents the hover state of Fig. 10(a), the Tc point represents the contact state of Fig. 10(b), and the Tp section represents the pressure state of Fig. 10(c). Fig. 11(b) is a graph showing the frequency characteristics in each of the operation states of Fig. 10(a) to (c).

[0127] Referring to (a) of Fig. 11, the LC value of the resonant circuit part composed of the capacitor part (not shown) and the inductor part (120) maintains a constant value until (Th) before the body (102) of the stylus pen (100) comes into contact with the touch surface, and then rapidly decreases immediately (Tc) after the body (102) comes into contact with the touch surface. In addition, in the section (Tp) where pressure is applied to the stylus pen (100) after the stylus pen (100) comes into contact with the touch surface, the LC value of the resonant circuit part further decreases according to the pressure. That is, in this section (Tp), as the pressure applied to the stylus pen (100) increases, the LC value of the resonant circuit part may gradually decrease. Referring to (a) of Fig. 11, the LC value of the resonant circuit part appears in the order of hover state > contact state > pressure state. In addition, immediately after the core body (102) comes into contact with the touch surface, the change in the LC value may be greater than that in a state where the pen pressure gradually increases thereafter.

[0128] When the inductance value of the inductor unit (120) and the capacitance value of the capacitor unit (not shown) are changed, the resonant frequency and Q value of the resonant circuit unit can be changed. The resonant frequency of the resonant circuit unit increases as the inductance of the resonant circuit unit decreases, and the Q value decreases as the inductance decreases. Therefore, as shown in (b) of Fig. 11, the frequency characteristics of the resonant signal (Vpen) output from the resonant circuit unit can have a resonant frequency that increases (hover state < contact state < pressure state) and a Q value that decreases (hover state > contact state > pressure state) as the movement distance of the core (102) increases, that is, as the writing pressure increases.

[0129] When the resonant frequency of the resonant circuit changes, the phase of the electromagnetic signal output from the stylus pen (100) changes. This change in phase is calculated as a change in the LC value of the resonant circuit in the stylus pen sensing device that interacts with the stylus pen (100), and based on this, whether the stylus pen (100) is in contact with the stylus pen sensing device and the writing pressure can be detected.

[0130] As described above, the stylus pen (100) according to one embodiment illustrated in FIGS. 1 to 9 can detect writing pressure in a stylus pen sensing device by changing at least one or both of the inductance value and the capacitance value of the resonant circuit portion. In addition, it also has the advantage of being able to sense precise writing pressure.

[0131] Meanwhile, the stylus pen according to the embodiment illustrated in FIGS. 1 to 9 may experience assembly deviations during the assembly process. Assembly deviations may cause certain problems, which will be described in detail below with reference to FIGS. 12 to 14.

[0132] Figures 12 (a) to (c) are drawings for explaining problems caused by assembly deviation of the body (102) during assembly of the stylus pen (100) illustrated in Figures 1 to 10.

[0133] Specifically, (a) of FIG. 12 shows a case where the core (102) is mounted as designed in advance without assembly deviation, and (b) and (c) of FIG. 12 show a case where the core (102) is not mounted in the pre-designed position due to assembly deviation that occurs during the assembly process.

[0134] In (a) of Fig. 12, the step portion (102T) of the core (102) is positioned in the through hole (132h) formed in the partition wall (132) of the first fixing member (130). The position of this step portion (102T) is properly assembled without deviation. On the other hand, in (b) and (c) of Fig. 12, the step portion (102T) is positioned in a position other than the through hole (132h) of the partition wall (132) due to an assembly deviation. Specifically, in (b) of FIG. 12, the step portion (102T) is placed in the second cavity (133b, see (b) of FIG. 5) of the first fixing member (130) in which the inductor portion (120) is placed, and in (c) of FIG. 12, the step portion (102T) is placed in the first cavity (133a, see (a) of FIG. 5) of the first fixing member (130) in which the magnetic body (140) is placed.

[0135] In the case of (b) of Fig. 12 where an assembly deviation occurs, even if pressure is continuously applied to the core (102) immediately after the contact state of Fig. 10 (b), the inductance value of the inductor part (120) does not immediately change because the distance between the inductor part (120) and the magnetic body (140) is constant. On the other hand, in the case of (c) of Fig. 12, the magnetic body (140) may move by the core (102) between the hover state of Fig. 10 (a) and the contact state of Fig. 10 (b), so that the inductance value of the inductor part (120) may change.

[0136] For each of (a) to (c) of Fig. 12, the change in resonance frequency according to the pressure applied to the core (102) is explained with reference to Fig. 13.

[0137] In the graph of Fig. 13, line ① without assembly deviation corresponds to (a) of Fig. 12, line ② with assembly deviation corresponds to (c) of Fig. 12, and line ③ with assembly deviation corresponds to (b) of Fig. 12.

[0138] Referring to Fig. 13, in the case of line ③, there is no change in the resonant frequency even if the pressure of the core (102) increases immediately after the contact state. The stylus pen sensing device interacting with the stylus pen (100) cannot detect the writing pressure applied to the core (102). In the case of line ②, since the resonant frequency changes even when the core (102) is in a hover state, the stylus pen sensing device can recognize that the core (102) is in a contact state rather than a hover state. In this way, due to the assembly deviations of (b) and (c) of Fig. 12, it may be difficult for the stylus pen sensing device to accurately detect the stylus pen (100).

[0139] Figures 14 (a) to (c) are drawings for explaining problems caused by assembly deviation of the connection terminals (165a, 165b) during assembly of the stylus pen (100) illustrated in Figures 1 to 10.

[0140] Specifically, (a) of FIG. 14 shows a case where the connection terminals (165a, 165b) are mounted as designed in advance without assembly deviation, and (b) and (c) of FIG. 14 show a case where the connection terminals (165a, 165b) are not mounted in the pre-designed position due to assembly deviation that occurs during the assembly process.

[0141] In (a) of Fig. 14, one end (165a1) of the connection terminal (165a) is positioned in contact with the ring terminal (161), and the other end (165a2) is positioned in contact with the connection pad (211a) of the substrate (210). The position of the connection terminal (165a) is properly assembled without deviation. On the other hand, in (b) and (c) of Fig. 14, the connection terminal (165a) is positioned in a position other than the pre-designed position due to an assembly deviation. Specifically, in (b) of Fig. 14, the connection terminal (165a) is offset by a predetermined distance toward the substrate (210), and one end (165a1) presses the ring terminal (161) with considerable force. In (c) of Fig. 14, the connection terminal (165a) is offset by a predetermined distance toward the first fixing member (130), so that one end (165a1) is spaced apart by a predetermined distance from the ring terminal (161).

[0142] In the case of (b) of Fig. 14 where an assembly deviation occurs, since the connection terminal (165a) and the ring terminal (161) are assembled while being pressed against each other, there is a problem that the pressure for recognizing the contact state of Fig. 10 (b) increases. On the other hand, in the case of (c) of Fig. 14, since the ring terminal (161) and the connection terminal (165a) are separated from the hover state of Fig. 10 (a), even if pressure is applied to the core (102), it is impossible for the stylus pen sensing device to sense the contact state of Fig. 10 (b).

[0143] In the following drawings 15 to 20, a stylus pen according to another embodiment is described, which does not significantly affect performance even when assembly deviations described with reference to drawings 12 to 14 occur, and can reduce manufacturing costs by reducing internal components.

[0144] FIG. 15 is a perspective view of a stylus pen (100') according to another embodiment of the present invention, and FIG. 16 is a cross-sectional view of a portion A' of the stylus pen (100') illustrated in FIG. 15.

[0145] The stylus pen (100') illustrated in FIGS. 15 to 16, compared to the stylus pen (100) illustrated in FIGS. 1 to 10, has the following differences: 1) the first elastic member (180') is made of a spring rather than a rubber material, and 2) the ring terminal (161), connection terminals (165a, 165b), jumping capacitor (215) and the components for electrical connection thereof of the stylus pen (100) illustrated in FIGS. 1 to 10 are omitted. Since the remaining components other than these are the same as those of the stylus pen (100) illustrated in FIGS. 1 to 10, a detailed description will be replaced with the previously described one, and the different components will be described in detail below.

[0146] Referring to FIGS. 15 and 16, the first elastic member (180') is configured as a spring. The first elastic member (180') begins to compress at low pressure (e.g., about 10 gf), and can be arranged so that the compressive strength is low and the compression is quickly performed even with a small increase in pressure.

[0147] Figures 17(a) and (b) are drawings for explaining the first elastic member (180') illustrated in Figure 16. Figure 17(a) shows the state when no force is applied to the first elastic member (180'), and Figure 17(b) is a drawing showing that the first elastic member (180') is arranged between the movable member (170) and the second fixed member (190) illustrated in Figure 16.

[0148] The first elastic member (180') may be positioned in a partially compressed (or incompletely compressed) state, as illustrated in (b) of FIG. 17, by being sandwiched between the movable member (170) and the second fixed member (190). If a force (or repulsive force) greater than the amount of compression applied to the first elastic member (180') by the movable member (170) and the second fixed member (190) is not greater than the amount of compression applied to the first elastic member (180'), the first elastic member (180') is not compressed. Here, the force (or repulsive force) may be, for example, about 10 (gf). On the other hand, the second elastic member (190) is compressed if a force greater than the amount of compression applied to the second elastic member (190) is applied through the movable member (170).

[0149] <Mathematical expression 1> below represents the force (or repulsive force, F) of a partially compressed first elastic member (180').

[0150]

[0151] In the above <Mathematical Formula 1>, G represents the transverse elastic modulus of the spring, Na represents the effective number of turns of the spring, D represents the diameter of the spring, d represents the diameter of the wire, and x represents the length of the spring in the compressed (-direction) direction.

[0152] Meanwhile, the first elastic member (180') may be positioned between the movable member (170) and the second fixed member (190) in an uncompressed state. Therefore, the stylus pen (100') according to another embodiment of the present invention is not limited to being positioned between the movable member (170) and the second fixed member (190) with a portion of the first elastic member (180') compressed.

[0153] The first elastic member (180') may be configured to react at a relatively greater weight than the elastic body (155).

[0154] Hereinafter, the operation of the stylus pen (100') according to another embodiment shown in FIGS. 15 to 17 will be described with reference to FIG. 18.

[0155] FIG. 18 (a) to (c) are drawings for explaining the operation of the stylus pen (100') illustrated in FIGS. 15 to 17. Specifically, FIG. 18 (a) is a drawing showing a hover state (H) of the stylus pen (100'), FIG. 18 (b) is a drawing showing a contact state (C) of the stylus pen (100'), and FIG. 18 (c) is a drawing showing a pressure (P) state of the stylus pen (100').

[0156] Referring to (a) of Fig. 18, in the hover state (H), no external force is applied to the core (102), so there is no change in the internal configuration.

[0157] Referring to (b) of Fig. 18, in the contact state (C), a predetermined pressure is applied to one end of the core body (102). The core body (102) moves inward of the housing (101) due to the applied pressure. As the core body (102) moves, the cover part (150) pushes the movable member (170) toward the first elastic member (180'), so that the movable member (170) is pushed to the second elastic member (185). In this situation, the first elastic member (180') is compressed as much as the movable member (170) is pushed. In addition, as the core body (102) moves, the stepped portion (102T) of the core body (102) pushes the magnetic body (140) toward the first elastic member (180'). As the magnetic body (140) is pushed, the distance between the inductor section (120) and the magnetic body (140) changes, and this change in distance changes the inductance value of the inductor section (120), which ultimately changes the resonant frequency.

[0158] Referring to (c) of Fig. 18, in the pressure state (P), a greater pressure is applied to one end of the core (102) than in the contact state (C). The greater pressure causes the core (102) to move further inwardly of the housing (101), and accordingly, the magnetic body (140) moves further away from the inductor portion (120). As the magnetic body (140) is pushed, the elastic body (155) arranged between the cover portion (150) and the magnetic body (140) is compressed, and the first elastic member (180') is further compressed by the movement of the movable member (170), and the second elastic member (185) is also compressed. Here, since the magnetic body (140) moves further away from the inductor portion (120), the inductance (L) value of the inductor portion (120) gradually decreases. Since the inductance value of the inductor section (120) decreases, the resonant frequency changes.

[0159] (a) and (b) of FIG. 19 are drawings showing examples of assembly deviation occurring in the core (102), and FIG. 20 is a graph showing changes in resonance frequency according to pressure applied to the core (102) for each of (a) and (b) of FIG. 19.

[0160] Figure 19 (a) is a drawing showing that the step portion (102T) of the core (102) is offset toward the magnetic body (140) due to an assembly deviation during the assembly process and is positioned almost in contact with one surface of the magnetic body (140), and Figure 19 (b) is a drawing showing that the step portion (102T) of the core (102) is offset toward the inductor portion (120) due to an assembly deviation.

[0161] In the graph of Fig. 20, line ① corresponds to Fig. 16 in the case where no assembly deviation occurs, line ② corresponds to (a) of Fig. 19, and line ③ corresponds to (b) of Fig. 19, respectively.

[0162] Referring to FIG. 20, a stylus pen according to another embodiment of the present invention including a first elastic member (180') exhibits less change in performance compared to a case where there is no assembly deviation, even if there is some assembly deviation in the body (102). Therefore, it has a more advantageous advantage in mass production than the stylus pen (100) illustrated in FIG. 1.

[0163] In addition, the stylus pen (100') illustrated in FIGS. 15 to 18 has the advantage of being able to have a simple internal structure and further reducing manufacturing costs because it does not use components such as the jumping capacitor (215), ring terminal (161), and connection terminal (165a, 165b) of the stylus pen (100) illustrated in FIGS. 1 to 9. Furthermore, in order to arrange the connection terminals (165a, 165b), a part of the groove (194) of the second fixed member (190) illustrated in FIG. 7 and the first groove (177) of the movable member (170) illustrated in FIG. 6 are unnecessary.

[0164] Meanwhile, although not illustrated in a separate drawing, a stylus pen according to another embodiment of the present invention may be one in which the first elastic member (180) in the stylus pen (100) illustrated in FIGS. 1 and 2 is replaced with the first elastic member (180') illustrated in FIGS. 16 and 17.

[0165] The features, structures, effects, etc. described in the embodiments above are included in one embodiment of the present invention and are not necessarily limited to just one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by those skilled in the art to which the embodiments pertain. Therefore, the contents related to such combinations and modifications should be construed as being included within the scope of the present invention.

[0166] In addition, although the above description focuses on embodiments, these are merely examples and do not limit the present invention. Those skilled in the art to which the present invention pertains will appreciate that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present embodiment. For example, each component specifically shown in the embodiments can be modified and implemented. In addition, differences related to such modifications and applications should be interpreted as being included within the scope of the present invention defined in the appended claims.

[0167] [Explanation of symbols]

[0168] 100, 100': Stylus pen

[0169] 101: Housing

[0170] 102: Body

[0171] 110: Inner case

[0172] 115: Guide Department

[0173] 120: Inductor section

[0174] 130: First fixed member

[0175] 190: Second fixed member

[0176] 140: Magnetic body

[0177] 150: Cover

[0178] 155: Elastic body

[0179] 161: Ring terminal

[0180] 165a, 165b: Connection terminals

[0181] 170: Moving part

[0182] 180, 180': First elastic member

[0183] 185: Second elastic member

[0184] 210, 210': substrate

Claims

1. Inductor section; A first elastic member arranged spaced apart from the above inductor section; A core body disposed through the inductor section and moving in the direction of the first elastic member by an external force acting at one end; and A magnetic material is disposed between the inductor portion and the first elastic member, and the distance between the inductor portion and the first elastic member changes in conjunction with the core body; A stylus pen, wherein the first elastic member is compressed by movement of the core body.

2. In paragraph 1, A stylus pen, wherein the first elastic member is a spring.

3. In paragraph 2, A stylus pen, wherein the first elastic member is positioned in a compressed state at least in part.

4. In paragraph 2, Further comprising a second elastic member surrounding a portion of the first elastic member and compressed by movement of the core body, A stylus pen wherein the second elastic member is made of rubber or a spring.

5. In paragraph 1, A stylus pen wherein the first elastic member is made of rubber.

6. In paragraph 5, Further comprising a second elastic member surrounding a portion of the first elastic member and compressed by movement of the core body, A stylus pen, wherein the second elastic member is made of a rubber material that is relatively harder than the first elastic member.

7. In any one of paragraphs 1 to 6, A housing in which the inductor section, the first elastic member, the magnetic body, and the remaining portion except for one end of the core body are placed inside; A first fixing member fixedly arranged inside the housing; A second fixing member positioned at a predetermined distance from the first fixing member inside the housing; and Further comprising a movable member that moves in conjunction with the core between the first fixed member and the second fixed member; A stylus pen, wherein the first elastic member is fixedly arranged inside the second fixed member and is pressed and compressed by the moving member moving in the lateral direction of the second fixed member.

8. In paragraph 7, The above first fixed member is, A first cavity in which the magnetic body is placed; A second cavity in which a portion of the above inductor section is placed; and A bulkhead disposed between the first cavity and the second cavity and having a through hole through which the core penetrates; A stylus pen, wherein the diameter of the through hole of the above bulkhead is larger than the diameter of the through hole of the above magnetic body.

9. In paragraph 7, The above body has a step formed between the one end and the other end, Based on the above-mentioned step, the thickness of one end of the core body is thicker than the thickness of the other end of the core body, A stylus pen, wherein the diameter of the through hole of the above inductor portion and the through hole of the first fixing member are larger than the diameter of the through hole of the magnetic body.

10. In paragraph 9, A stylus pen in which the distance between the magnetic body and the inductor increases by pushing one side of the magnetic body by an external force acting on one side of the body.

11. In paragraph 7, Further comprising an inner case disposed inside the housing and surrounding the inductor section, the first fixed member, the movable member, and the second fixed member; The first fixing member and the second fixing member include at least one first protrusion protruding from the outer surface, A stylus pen, wherein the inner case has a first opening in which the first protrusions of the first fixing member and the second fixing member are arranged.

12. In paragraph 11, The first opening includes a base groove extending along the longitudinal direction of the inner case; and a plurality of extension grooves connected to the base groove and extending in a direction perpendicular to the longitudinal direction of the base groove; A stylus pen, wherein the above-mentioned plurality of extension grooves are formed at positions corresponding to the first protrusions of the first fixing member and the second fixing member.

13. In paragraph 7, The first fixing member has one or more first grooves formed on the outer surface, The above movable member has one or more extensions arranged in the first groove, and one or more first grooves and second grooves formed on the outer surface, The second fixed member includes a first extension part and a second extension part respectively disposed in the first groove and the second groove of the movable member, A stylus pen in which, when the movable member moves, the extension part of the movable member moves within the first groove of the first fixed member, and the first and second extension parts of the second fixed member are arranged within the first and second grooves of the movable member.

14. In paragraph 7, The above second elastic member has a groove, The above movable member has a first groove, A stylus pen, wherein the second fixed member includes a first extension portion arranged in the groove of the second elastic member and the first groove of the movable member.

15. In paragraph 7, A capacitor section including a basic capacitor electrically connected to the inductor section and a jumping capacitor electrically short-circuited or opened with the basic capacitor; A substrate having the above capacitor section mounted thereon; A ring terminal disposed on one side of the movable member between the movable member and the first fixed member and moving in conjunction with the movable member; and A connection terminal is disposed on the side of the above movable member and the second fixed member, one end of which is in contact with the ring terminal, and the other end of which is connected to the connection pad of the substrate; A stylus pen, wherein when the movable member moves, the ring terminal is separated from one end of the connection terminal, and the basic capacitor and the jumping capacitor are electrically opened to each other.

16. In paragraph 15, A stylus pen having a groove in which the connection terminal is arranged on the side of the above-mentioned movable member and the second fixed member.

17. In any one of paragraphs 1 to 6, The distance between the magnetic body and the inductor changes due to the movement of the core body, The inductance value of the inductor section changes according to the change in the above distance, A stylus pen in which the resonant frequency of a signal emitted to the outside changes according to a change in the above inductance value.

18. In paragraph 7, A cover portion arranged between the other end of the body and the moving member; and An elastic body disposed between the cover part and the magnetic body; A stylus pen, including:

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