stylus pen

Abstract

The present invention relates to a stylus pen, and more particularly to a stylus pen that can clearly distinguish between hover action, touch action, and writing pressure action, has a simple internal structure, is easy to sense writing pressure, has relatively little performance change due to assembly deviation, and can reduce manufacturing costs. A stylus pen according to an embodiment of the present invention includes an inductor portion, a first elastic member disposed at a distance from the inductor portion, a core body disposed through the inductor portion and moving toward the first elastic member due to an external force acting on one end thereof, and a magnetic body disposed between the inductor portion and the first elastic member and changing the distance between the inductor portion and the core body in conjunction with the core body, and the first elastic member is compressed by the movement of the core body.

Description

[Technical Field]

[0001] The present invention relates to a stylus pen, and more particularly to a stylus pen that can clearly distinguish between hover action, touch action, and writing pressure action, has a simple internal structure, is easy to sense writing pressure, has relatively little performance change due to assembly deviation, and can reduce manufacturing costs. [Background technology]

[0002] A stylus pen is a pen-shaped device that can input data by lightly touching the screen to drag or click. Users use a stylus pen for precise touch input.

[0003] Stylus pens can be classified into active stylus pens and passive stylus pens depending on whether they contain a battery and electronic components.

[0004] Active stylus pens have the advantage of being superior in basic performance compared to passive stylus pens and being able to provide additional functions (pressure, hovering, buttons), but they have the disadvantage of being expensive and requiring a power source to charge the battery, so they are not widely used except by some advanced users.

[0005] Passive stylus pens have the advantages of being cheaper than active stylus pens and not requiring batteries, but they have the disadvantage of being less capable of precise touch recognition than active stylus pens. However, recently, two technologies have been proposed to realize passive stylus pens that can achieve precise touch recognition: the inductive resonance method, Electro Magnetic Resonance (EMR), and the capacitive resonance method.

[0006] The EMR method has superior quality in writing / drawing, which is the core function of a stylus pen, but has the disadvantage of being thick and costly because a separate EMR sensor panel and EMR driver IC must be added in addition to the capacitance touch panel.

[0007] The capacitive resonance method uses a general capacitance touch sensor and touch controller IC, and supports pen touch by improving the performance of the IC without any additional costs.

[0008] In the EMR or capacitive resonance method, in order for a touch sensor to accurately identify a touch by a stylus pen, the amplitude of the resonance signal must be large, and therefore the frequency of the drive signal transmitted to the stylus pen must be approximately the same as the resonance frequency of the resonant circuit built into the stylus pen. However, with conventional EMR or capacitive resonance methods, even if the resonance frequency and the drive signal frequency match, there is a problem of significant signal attenuation making signal transmission difficult. As a result, despite many years of attempts by many touch controller IC vendors, a sufficient output signal has not been achieved, and no vendor has yet succeeded in mass production.

[0009] Therefore, in order to manufacture an EMR or capacitive resonant stylus pen that can generate the maximum output signal, how to design the internal resonant circuit and the pen structure is a very important factor.

[0010] Meanwhile, in the case of passive stylus pens that use the electro-magnetic resonance (EMR) method, a digitizer transmits an electromagnetic signal to the pen and then receives a resonance signal from the pen. Such digitizers have a fine arrangement of coils in which a current can be induced by a magnetic signal to receive touch information from the pen. However, such digitizers have problems such as being unable to accommodate the miniaturization and thinning of touch input devices and being inflexible in design.

[0011] On the other hand, conventional stylus pens require expensive pressure sensors to detect writing pressure, making it difficult to measure precise writing pressure. Summary of the Invention [Problem to be solved by the invention]

[0012] An object of the present invention is to provide a stylus pen that can clearly distinguish between various stylus pen actions, such as hover actions, touch actions, and pen pressure actions.

[0013] Another object of the present invention is to provide a stylus pen that can reduce manufacturing costs by reducing the number of internal parts.

[0014] Another object of the present invention is to provide a stylus pen that is relatively free from performance variations due to assembly deviations of internal parts. [Means for solving the problem]

[0015] A stylus pen according to an embodiment of the present invention includes an inductor portion, a first elastic member disposed at a distance from the inductor portion, a core body disposed through the inductor portion and moving toward the first elastic member due to an external force acting on one end thereof, and a magnetic body disposed between the inductor portion and the first elastic member and changing the distance between the inductor portion and the core body in conjunction with the core body, and 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 may be disposed in a state in which at least a portion of the first elastic member is compressed.

[0018] Here, the device may further include a second elastic member surrounding a portion of the first elastic member and being compressed by the 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, the elastic member may further include a second elastic member surrounding a portion of the first elastic member and being compressed by the movement of the core body, the second elastic member being made of a rubber material that is relatively harder than the first elastic member.

[0021] Here, the device may further include a housing in which the inductor portion, the first elastic member, the magnetic body, and the remaining portion of the core body except for one end thereof are disposed, a first fixed member fixedly disposed within the housing, a second fixed member disposed within the housing at a predetermined distance from the first fixed member, and a movable member that moves in conjunction with the core body between the first fixed member and the second fixed member, and the first elastic member may be fixedly disposed within the second fixed member and be pushed and compressed by the movable member that moves in the direction toward the second fixed member.

[0022] Here, the first fixing member includes a first cavity in which the magnetic body is arranged, a second cavity in which a portion of the inductor portion is arranged, and a partition wall arranged 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 may have a step portion formed between the one end and the other end, and the thickness of the one end side of the core body based on the step portion may be thicker than the thickness of the other end side of the core body, and the diameters of the through hole of the inductor portion 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, an external force acting on one end of the core body causes the step portion to press one surface of the magnetic body, thereby increasing the distance between the magnetic body and the inductor portion.

[0025] Here, the housing may further include an inner case disposed inside the housing and surrounding the inductor portion, the first fixed member, the moving member, and the second fixed member, wherein the first fixed member and the second fixed member include one or more first protrusions protruding from their outer surfaces, and the inner case may have a first opening in which the first protrusions of the first fixed member and the second fixed member are disposed.

[0026] Here, the first opening may include a base groove formed to extend 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 may be formed at positions corresponding to first protrusions of the first fixing member and the second fixing member.

[0027] Here, the first fixed member may have one or more first grooves formed on its outer surface, the movable member may have one or more extensions disposed in the first grooves and one or more first and second grooves formed on its outer surface, the second fixed member may include first and second extensions disposed in the first and second grooves of the movable member, respectively, and when the movable member moves, the extensions of the movable member may move within the first grooves of the first fixed member, and the first and second extensions of the second fixed member may be disposed in the first and second grooves of the movable member.

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

[0029] Here, the device includes a capacitor unit including a base capacitor electrically connected to the inductor unit and a jumping capacitor that is electrically short-circuited or open with the base capacitor, a substrate on which the capacitor unit is mounted, a ring terminal that is disposed on one side of the movable member between the movable member and the first fixed member and moves in conjunction with the movable member, and a connection terminal that is disposed on a side of the movable member and the second fixed member, one end of which contacts the ring terminal and the other end of which is connected to a connection pad of the substrate, and when the movable member moves, if the ring terminal separates from one end of the connection terminal, the base capacitor and the jumping capacitor can be electrically open with each other.

[0030] Here, the moving member and the second fixed member may have grooves on their side surfaces in which the connection terminals are disposed.

[0031] Here, the movement of the core body changes the distance between the magnetic material and the inductor section, and the change in distance changes the inductance value of the inductor section, and the change in inductance value can change the resonant frequency of the signal emitted to the outside.

[0032] Here, the magnetic bearing may include a cover portion disposed between the other end of the core body and the moving member, and an elastic body disposed between the cover portion and the magnetic body. [Effects of the Invention]

[0033] The use of a stylus pen according to an embodiment of the present invention has the advantage of clearly distinguishing between hover, touch, and pressure actions.

[0034] Another advantage is that the number of internal parts can be reduced, thereby reducing manufacturing costs.

[0035] Another advantage is that performance changes due to internal component assembly deviations are relatively small.

[0036] Another advantage is that the internal structure is simple.

[0037] Another advantage is that the contact action and the writing pressure action of the stylus pen can be distinguished by utilizing the change in the distance between the magnetic material and the inductor portion due to the movement of the core. [Brief explanation of the drawings]

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

[0039] [Figure 2] FIG. 2 is a cross-sectional view of part A of the stylus pen 100 shown in FIG.

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

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

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

[0043] [Figure 6] 6(a) and 6(b) are perspective views of the moving member 170 shown in FIGS. 2 and 4, seen from various sides.

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

[0045] [Figure 8] FIG. 8 is a perspective view of a portion of the configuration shown in FIGS. 2 and 4, seen from one side.

[0046] [Figure 9] 9(a) and 9(b) are perspective views of only the partial configuration shown in FIGS. 2 and 4. FIG.

[0047] [Figure 10] 10(a) to 10(c) are diagrams for explaining the operation of the stylus pen 100 shown in FIGS. 1 to 9. FIG.

[0048] [Figure 11] Figure 11(a) is a diagram showing an example of the change in the LC value of the resonant circuit unit due to the operations of Figure 10(a) to (c), and Figure 11(b) is a graph showing the frequency characteristics in each of the operation states of Figure 10(a) to (c).

[0049] [Figure 12] 12(a) to 12(c) are diagrams for explaining problems that occur due to deviations in assembly of the core body 102 when assembling the stylus pen 100 shown in FIGS. 1 to 10. FIG.

[0050] [Figure 13] FIG. 13 is a graph showing the change in resonance frequency due to the pressure applied to the core body 102 for each of (a) to (c) of FIG.

[0051] [Figure 14] 14(a) to 14(c) are diagrams for explaining problems that occur due to assembly deviations of the connection terminals 165a and 165b when assembling the stylus pen 100 shown in FIGS. 1 to 10. FIG.

[0052] [Figure 15] FIG. 15 is a perspective view of a stylus pen 100' according to another embodiment of the present invention.

[0053] [Figure 16]FIG. 16 is a cross-sectional view of part A' of the stylus pen 100' shown in FIG.

[0054] [Figure 17] 17(a) and 17(b) are views for explaining the first elastic member 180' shown in FIG.

[0055] [Figure 18] 18(a) to 18(c) are diagrams for explaining the operation of the stylus pen 100' shown in FIGS. 15 to 17. FIG.

[0056] [Figure 19] 19(a) and 19(b) are diagrams showing an example in which assembly deviation occurs in the core body 102. In FIG.

[0057] [Figure 20] FIG. 20 is a graph showing the change in resonance frequency due to the pressure applied to the core body 102 for each of (a) and (b) of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0058] The following detailed description of the present invention refers to the accompanying drawings, which show, by way of example, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the present invention, although different from one another, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein in connection with one embodiment may be embodied in other embodiments without departing from the spirit and scope of the invention. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be modified without departing from the spirit and scope of the invention. Therefore, the following detailed description is not intended to be taken in a limiting sense, and the scope of the present invention is limited only by the appended claims, along with the full scope of equivalents to which such claims, if properly interpreted, are entitled. In the drawings, like reference numerals indicate the same or similar functionality throughout the various aspects.

[0059] FIG. 1 is a perspective view of a stylus pen 100 according to one embodiment of the present invention.

[0060] Referring to FIG. 1, a stylus pen 100 according to an embodiment of the present invention includes a housing 101 and a core body 102.

[0061] The housing 101 forms the exterior of the stylus pen 100. The housing 101 may be formed by combining two or more parts together, or may be formed as a single, integral part.

[0062] The housing 101 may be made of a non-conductive synthetic resin material.

[0063] 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 combined with each other to form the exterior of the stylus pen 100. Various components are housed inside the first housing 101a and the second housing 101b.

[0064] A button unit 109 may be arranged on the housing 101. The button unit 109 may be arranged on the second housing 101b. The button unit 109 may be for performing a specific operation of the stylus pen 100. For example, the button unit 109 may be a button for a cancel operation.

[0065] The core body 102 includes one end portion disposed outside the housing 101, and the remaining portion excluding the one end portion is disposed inside the housing 101. A portion of the one end portion of the core body 102 can move inside the housing 101 due to an external force from the outside. As the external force increases, the volume of the portion of the one end portion of the core body 102 that enters the housing 101 can increase. When the applied external force decreases, the portion of the one end portion of the core body 102 moves out of the housing 101 again. When the external force is removed, the portion of the one end portion of the core body 102 returns to its original state.

[0066] Various components arranged inside the housing 101 will now be described with reference to FIGS.

[0067] 2 is a cross-sectional view of part A of the stylus pen 100 shown in FIG. 1, FIG. 3(a) is a perspective view for explaining the structure of the inner case 110 and the guide part 115 shown in FIG. 2, FIG. 3(b) is a perspective view of only the inner case 110, FIG. 4 is a perspective view of the case where the inner case 110 shown in FIG. 3(a) is removed, and FIGS. 5(a) and 5(b) are views showing various cases where the first fixing member 130 shown in FIGS. 2 and 4 is attached to the stylus pen 100. 6A and 6B are perspective views of the movable member 170 shown in FIGS. 2 and 4 from various sides, FIG. 7A and 7B are perspective views of the second fixed member 190 shown in FIGS. 2 and 4 from various sides, FIG. 8 is a perspective view of a portion of the configuration shown in FIGS. 2 and 4 from one side, and FIG. 9A and 9B are perspective views of only a portion of the configuration shown in FIGS. 2 and 4.

[0068] 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, connection terminals 165a, 165b, a movable 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.

[0069] 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 unit 120, the first fixing member 130, the ferrite chip 140, the cover member 150, the ring terminal 161, the connection terminals 165a and 165b, the moving 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 serve to protect various components disposed inside from physical and / or electrical shocks.

[0070] 2 and 3(a) and 3(b), the inner case 110 may have a first opening 111 in which the first protrusion 131 of the first fixing member 130 and the first protrusion 192 of the second fixing member 190 are disposed. The first opening 111 may have a base groove 111b formed to extend 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 and 192. For example, the first opening 111 may have an "E" shape.

[0071] The inner case 110 can be rotated counterclockwise or clockwise around the core 102 as a rotation axis to position the multiple first protrusions 131, 192 from the multiple extension grooves 111e to the base groove 111b, or from the base groove 111b to the multiple extension grooves 111e. In particular, by positioning the multiple first protrusions 131, 192 from the base groove 111b to the multiple extension grooves 111e, the first fixing member 130 and the second fixing member 190 can be fixed in position inside the inner case 110. Meanwhile, because the moving member 170 is not directly coupled to the inner case 110, it can move between the first fixing member 130 and the second fixing member 190 in conjunction with the linear reciprocating motion of the core 102 caused by an external force.

[0072] The inner case 110 may have a second opening 113 in which the extension coils 125a and 125b are disposed and which exposes the connection terminals 165a and 165b. The second opening 113 provides a space for disposing the extension coils 125a and 125b and can protect the extension coils 125a and 125b from external impact. In addition, the attachment positions of the connection terminals 165a and 165b can be easily confirmed through the second opening 113.

[0073] The guide part 115 may be disposed 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 shield the inductor part 120 from external electrical or magnetic influences. The guide part 115 may be configured separately from the inner case 110, but is not limited thereto, and the guide part 115 may be configured integrally with the inner case 110.

[0074] 2 and 4, guide section 115, inductor section 120, first fixed member 130, moving member 170, and second fixed member 190 may be arranged in this order from one end of core body 102 along the longitudinal direction of stylus pen 100 (hereinafter referred to as the "longitudinal direction"). That is, along the longitudinal direction, inductor section 120 may be arranged on guide section 115, first fixed member 130 may be arranged on inductor section 120, moving member 170 may be arranged on first fixed member 130, and second fixed member 190 may be arranged on moving member 170.

[0075] The inductor unit 120 includes a ferrite core 121 and a coil unit 123 wound around the ferrite core 121. The ferrite core 121 has a through-hole therein through which the core 102 passes. The core 102 can move linearly back and forth along the longitudinal direction via the through-hole. The coil unit 123 may be wound around the ferrite core 121 in at least one layer. Extension coils 125a and 125b may be connected to both ends of the coil unit 123, respectively. The extension coils 125a and 125b extend along the longitudinal direction and may be connected to coil electrodes 213a and 213b arranged on the substrate 210, respectively.

[0076] The inductor unit 120 is fixedly installed inside the housing 101. The inductor unit 120 may be fixed between the first fixing member 130 and the guide unit 115 in the longitudinal direction. The inductor unit 120 may be fixed by the inner case 110 in a direction perpendicular to the longitudinal direction (hereinafter referred to as the "vertical direction").

[0077] The inductor part 120 may be fixed to one side of the first fixing member 130. Here, a portion of the inductor part 120 may be disposed in the second cavity 133b of the first fixing member 130.

[0078] The inductor unit 120 may be electrically connected to a capacitor unit (not shown) mounted on the substrate 210 to form a resonant circuit. A resonant frequency may be set depending on the inductance (L) value of the inductor unit 120 and the capacitance (C) value of the capacitor unit (not shown). The resonant frequency may be variable because the inductance (L) value of the inductor unit 120 changes depending on the movement of the magnetic material 140.

[0079] The capacitor unit (not shown) is disposed on the substrate 210 and has a predetermined capacitance (C) value. The capacitor unit (not shown) may include two or more capacitors. At least one of the two or more capacitors may be configured as a basic capacitor in a circuit in a state where it is always electrically connected to the inductor unit 120.

[0080] The capacitor unit (not shown) includes a jumping capacitor 215. The jumping capacitor 215 may be mounted on the substrate 210 and configured to be electrically connected to the connection terminals 165a and 165b. For example, the jumping capacitor 215 may be electrically connected to connection pads 211a and 211b disposed on the substrate 210 via conductive patterns 212a and 212b. The jumping capacitor 215 may be electrically connected to or separated from the base 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 and 165b, and the jumping capacitor 215 is electrically connected to the base capacitor. On the other hand, if an external force is applied to the core body 102 and the movable member 170, which is linked to the core body 102, moves toward the first elastic member 180, the ring terminal 161 separates from the connecting terminals 165a and 165b, and at this time, the jumping capacitor 215 can be electrically separated from the basic capacitor.

[0081] 2, 4, 5(a) and 5(b), 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 shown in FIG. 2 is disposed in the first cavity 133a, and one end of the ferrite core 121 of the inductor unit 120 shown 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 102 passes.

[0082] The inductor part 120 is disposed on one side of the first fixing member 130, and the second fixing member 190 is disposed at a predetermined distance from the other side of the first fixing member 130.

[0083] The first fixing member 130 may have a large number of first protrusions 131 arranged on its outer surface, as described above.

[0084] A plurality of first grooves 135 may be formed on the outer surface of the first fixing member 130, in which the plurality of extension portions 171 of the moving member 170 are respectively disposed. Also, a second groove 137 may be formed on the outer surface of the first fixing member 130 along the longitudinal direction, maintaining a constant distance from the extension coils 125a and 125b shown in FIG.

[0085] 2, 4, and 6(a) and (b), the moving member 170 is disposed between the first fixed member 130 and the second fixed member 190. The moving member 170 can move linearly back and forth between the first fixed member 130 and the second fixed member 190 in conjunction with the movement of the core body 102 in the longitudinal direction.

[0086] 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 portion of the first elastic member 180 shown in FIG. 2 is disposed in the first cavity 173a, and a portion of the cover part 150 shown 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.

[0087] A plurality of extensions 171 are arranged on the outer surface of the movable member 170 to be placed in the plurality of first grooves 135 of the first fixed member 130. The plurality of extensions 171 have a shape extending along the longitudinal direction and can move along the first grooves 135 of the first fixed member 130.

[0088] A plurality of second grooves 175 may be formed on the outer surface of the movable member 170, in which the second extensions 193 of the second fixed members 190 shown in Fig. 7 are respectively disposed. As the movable member 170 linearly reciprocates in the longitudinal direction, the second grooves 175 are also moved together, so that the positions of the second extensions 193 of the second fixed members 190 disposed in the second grooves 175 may change.

[0089] The second groove 175 of the movable member 170 may have a shape corresponding to the second extension portion 193 of the second fixed member 190. The second groove 175 may have a shape that prevents the second extension portion 193 of the second fixed member 190 from completely disengaging 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 narrows as it goes toward the second fixed member 190, and the second extension portion 193 of the second fixed member 190 may have a shape that protrudes in the width direction of the second groove 175.

[0090] A first groove 177 may be formed on the outer surface of the moving member 170. The first groove 177 is formed long along the longitudinal direction, and as shown in FIG. 9(b), the connection terminals 165a and 165b may be disposed in the first groove 177. The first groove 177 may fix and guide the positions of the connection terminals 165a and 165b. In addition, the first extension 192 of the second fixing member 190 may be disposed in the first groove 177 together with the connection terminals 165a and 165b.

[0091] The movable member 170 is disposed between the first fixed member 130 and the second fixed member 190, and the extension 171 of the movable member 170 is disposed 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 disposed in the first and second grooves 175, 177 of the movable member 170, which has the advantage that the movable member 170 does not come off even when it is moved frequently.

[0092] The moving member 170 includes a surface 179 in which the first cavity 173a is disposed, and the ring terminal 161 shown in FIGS. 2 and 8 may be disposed on the surface 179. The shape of the surface 179 may correspond to the shape of the ring terminal 161. The ring terminal 161 disposed on the surface 179 may be guided by inner surfaces of one or more extensions 171 disposed around the periphery.

[0093] 2, 4, and 7, the second fixing member 190 is fixedly disposed inside the housing 101. At least a portion of the second fixing member 190 is fixedly disposed inside the inner case 110.

[0094] The second fixing member 190 includes a cylindrical base portion 191. One surface 191a of the base portion 191 has a cavity 195 in which a part of the first elastic member 180 shown in Fig. 2 is disposed. The second elastic member 185 shown in Fig. 2 is disposed on the one surface 191a of the base portion 191.

[0095] The second fixing member 190 includes a first extension 199 and a second extension 193 extending from one surface 191a of the base 191 toward the movable member 170. A plurality of the first extensions 199 and the second extensions 193 may be arranged on the one surface 191a of the base 191. Specifically, two first extensions 199 may be arranged to face each other, and two second extensions 193 may be arranged to face each other. The plurality of first and second extensions 191, 199 may guide the outer surface of the second elastic member 185 shown 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 extensions 191, 199.

[0096] The inner surface of the first extension portion 199 guides the outer surface of the second elastic member 185, and the outer surface of the first extension portion 199 can support a portion of the connection terminals 165a and 165b shown in FIGS.

[0097] The second extension 193 may have a predetermined shape that prevents it from being disengaged from the second groove 175 after being coupled to the second groove 175 of the moving member 170. For example, the second extension 193 may have a shape in which at least a portion thereof protrudes, and it cannot be disengaged from the second groove 175.

[0098] The second fixing member 190 may have a groove 194 formed on the outer surface of the base portion 191. A bottom surface of the groove 194 may be connected to the outer surface of the first extension portion 199 without any step. Parts of the connection terminals 165a and 165b shown in FIGS. 2 and 4 may be disposed in the groove 194.

[0099] The second fixing member 190 may include a mounting portion 196 extending in the longitudinal direction from another surface (not shown) of the base portion 191. The mounting portion 196 may have a cavity 197 in which the substrate 210 shown in FIGS. 2 and 4 is disposed.

[0100] 2 and 4 to the substrate 210 disposed in the cavity 197. The other ends of the connection terminals 165a and 165b may be disposed in the openings 198 and may be coupled to the connection pads 211a and 211b of the substrate 210.

[0101] 2, 4, 8, 9(a) and 9(b), the core body 102 is formed to extend a predetermined length along the longitudinal direction, and one end may have a pointed shape, where the one end is exposed to the outside of the housing 101.

[0102] The core body 102 includes a step portion 102T disposed in 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 from each other, 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. Due to the configuration of the step portion 102T, when the core body 102 moves in the longitudinal direction due to an external force, the magnetic body 140 can move along with it. That is, when the core body 102 moves, the step portion 102T presses one side of the magnetic body 140, causing the magnetic body 140 to move in the longitudinal direction. As the magnetic body 140 moves in the longitudinal direction, the separation distance between the inductor portion 120 and the magnetic body 140 changes. The change in the separation distance changes the inductance (L) value of the inductor portion 120, and the change in the inductance value changes the resonant frequency of the stylus pen 100. A stylus pen sensing device that interacts with the stylus pen 100 senses the change in the resonance frequency, and can detect the writing pressure (pressure) applied to the core body 102 .

[0103] The magnetic body 140 is disposed inside the first cavity 133a of the first fixing member 130 shown in Fig. 5 and has a cylindrical shape. 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 equal to or larger than the second thickness D2 and smaller than the first thickness D1.

[0104] The magnetic body 140 may be a ferrite chip.

[0105] The magnetic body 140 can move linearly back and forth along the longitudinal direction in conjunction with the core body 102. When the magnetic body 140 moves in conjunction with the core body 102, the inductance (L) value of the inductor section 120 can change.

[0106] A cover portion 161 is disposed at the other end of the core body 102. The cover portion 161 may have a shape that covers the other end of the core body 102. For example, the cover portion 161 may have a cylindrical shape with different thicknesses at the top and bottom.

[0107] An elastic body 155 may be disposed 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 sandwiched between a part of the cover portion 161, and the other end of the elastic body 155 may be disposed so as to abut against the magnetic body 140.

[0108] The elastic body 155 may be for correcting deviations in the magnetic body 140. For example, if the length (or height) of the magnetic body 140 is 0.1 mm smaller than the specification, the elastic body 155 will bring the magnetic body 140 into close contact with the partition wall 132 of the first fixing member 130.

[0109] The ring terminal 161 has a hollow circular shape and electrically connects the two connection terminals 165a and 165b. The shape of the ring terminal 161 is not limited to a circular shape, but may be a polygonal shape.

[0110] The ring terminal 161 is disposed on one surface of the moving member 170 and moves in conjunction with the moving member 170. That is, the ring terminal 161 moves together with the moving member 170 as the moving member 170 makes a linear reciprocating motion in the longitudinal direction.

[0111] The connection terminals 165a and 165b include one side that contacts or separates from the ring terminal 161 and the other side that is connected to the substrate 210. The one side may contact or separate from the ring terminal 161 according to the movement of the ring terminal 161 linked with the moving member 170. The other side is directly connected to the connection pads 211a and 211b of the substrate 210 shown in FIG. 2 by soldering or the like.

[0112] Each of the connection terminals 165a and 165b includes a base portion disposed between the one side portion and the other portion. The base portion may have a shape extending in the longitudinal direction. The base portion may be disposed in the first groove 177 of the movable member 170 shown in FIG. 6 and in the groove 194 of the second fixed member 190 shown in FIG. 7, and may be guided by the first extension portion 199 of the second fixed member 190.

[0113] The first elastic member 180 is disposed within the second fixing member 190. The first elastic member 180 may have a cylindrical shape that is elongated in the longitudinal direction. The first elastic member 180 may be made of a rubber material.

[0114] The first elastic member 180 may have one end disposed in the cavity 195 of the second fixed member 190 shown in FIG. 7, and the other end disposed in the first cavity 173a of the moving member 170 shown in FIG.

[0115] The second elastic member 185 is disposed within the second fixing 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. Therefore, 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.

[0116] Meanwhile, the second elastic member 185 may be a spring configured to react to a relatively heavier force than the first elastic member 180. The second elastic member 185 is configured to have a thinner thickness in the longitudinal direction than the first elastic member 180 and a wider diameter in the vertical direction than the first elastic member 180.

[0117] The second elastic member 185 is disposed so as 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.

[0118] 8, the second elastic member 185 may have a groove 185g that is sandwiched by a portion of the first extension portion 199 of the second fixing member 190. Through this, the second elastic member 185 can be stably fixed to the second fixing member 190.

[0119] Hereinafter, the operation of the stylus pen 100 according to the embodiment shown in FIGS. 1 to 9 will be described with reference to FIG.

[0120] Figures 10(a) to 10(c) are diagrams for explaining the operation of the stylus pen 100 shown in Figures 1 to 9. Specifically, Figure 10(a) is a diagram showing a hover state H of the stylus pen 100, Figure 10(b) is a diagram showing a contact state C of the stylus pen 100, and Figure 10(c) is a diagram showing a writing pressure P state of the stylus pen 100.

[0121] 10(a), in the hover state H, no external force acts on the core body 102, and therefore no change occurs in the internal configuration. In particular, the ring terminal 161 and the connection terminals 165a and 165b remain in contact with each other.

[0122] Referring to (b) of FIG. 10, in contact state C, a predetermined pressure is applied to one end of the core 102. The applied pressure causes the core 102 to move toward the inside of the housing 101. As the core 102 moves, the cover 150 pushes the moving member 170 toward the first elastic member 180, and the ring terminal 161 moves away from the connecting terminals 165a and 165b. Therefore, the jumping capacitor 215 shown in FIG. 9 is electrically disconnected from the base capacitor, and the total capacitance of the capacitor unit (not shown) decreases. Here, because the magnetic body 140 does not move, the inductance value of the inductor unit 120 remains unchanged. As the total capacitance value of the capacitor unit (not shown) decreases, the resonant frequency changes.

[0123] Referring to FIG. 10 (c), in the writing pressure state P, a pressure greater than that in the contact state C is applied to one end of the core 102. The greater pressure causes the core 102 to move further inwardly of the housing 101, causing the magnetic body 140 to be pressed by the stepped portion 102T of the core 102. As the magnetic body 140 is pressed, the elastic body 155 disposed between the cover 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 moving member 170. As the magnetic body 140 moves away from the inductor unit 120, the inductance (L) value of the inductor unit 120 gradually decreases. The capacitance of the capacitor unit (not shown) remains the same as in the contact state C. As the inductance value of the inductor unit 120 decreases, the resonant frequency changes.

[0124] Figure 11(a) shows an example of the change in the LC value of the resonant circuit unit due to the operations of Figure 10(a) to (c), where the Th section shows the hover state of Figure 10(a), the Tc point shows the contact state of Figure 10(b), and the Tp section shows the writing pressure state of Figure 10(c). Figure 11(b) is a graph showing the frequency characteristics in each of the operation states of Figure 10(a) to (c).

[0125] 11(a), the LC value of the resonant circuit unit, which is composed of a capacitor unit (not shown) and an inductor unit 120, maintains a constant value until (Th) before the core 102 of the stylus pen 100 contacts the touch surface, and then rapidly decreases immediately (Tc) after the core 102 contacts the touch surface. Furthermore, in a section (Tp) where writing pressure is applied to the stylus pen 100 after the stylus pen 100 contacts the touch surface, the LC value of the resonant circuit unit further decreases with the writing pressure. That is, in this section (Tp), the LC value of the resonant circuit unit may gradually decrease as the writing pressure applied to the stylus pen 100 increases. Referring to FIG. 11(a), the LC value of the resonant circuit unit indicates a hover state > a contact state > a writing pressure state. Furthermore, immediately after the core 102 contacts the touch surface, the LC value may change more significantly than when the writing pressure gradually increases.

[0126] If 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 Figure 11 (b), the frequency characteristics of the resonant signal Vpen output from the resonant circuit unit may increase (hover state < contact state < writing pressure state) and decrease (hover state > contact state > writing pressure state) as the movement distance of the core 102 increases, i.e., as the writing pressure increases.

[0127] If the resonant frequency of the resonant circuit unit is changed, the phase of the electromagnetic signal output from the stylus pen 100 is changed. This phase change is used to calculate a change in the LC value of the resonant circuit unit in a stylus pen sensing device that interacts with the stylus pen 100, and based on this, it is possible to detect whether the stylus pen 100 is in contact with the stylus pen sensing device and the writing pressure.

[0128] As described above, the stylus pen 100 according to the embodiment shown in Figures 1 to 9 can detect writing pressure using a stylus pen sensing device by varying at least one or both of the inductance and capacitance values ​​of the resonant circuit unit, and also has the advantage of being able to sense writing pressure precisely.

[0129] Meanwhile, in the stylus pen according to the embodiment shown in Figures 1 to 9, assembly deviations may occur during the assembly process. The assembly deviations may cause certain problems, which will be described in detail below with reference to Figures 12 to 14.

[0130] 12(a) to 12(c) are diagrams for explaining problems that occur due to assembly deviation of the core body 102 when assembling the stylus pen 100 shown in FIGS. 1 to 10. FIG.

[0131] Specifically, Figure 12(a) shows a case where the core body 102 is installed as designed without any assembly deviation, while Figure 12(b) and Figure 12(c) show a case where the core body 102 cannot be installed in the designed position due to an assembly deviation that occurs during the assembly process.

[0132] In FIG. 12(a), the step portion 102T of the core body 102 is positioned in the through hole 132h formed in the partition wall 132 of the first fixing member 130. The position of the step portion 102T is properly assembled without deviation. On the other hand, in FIGS. 12(b) and 12(c), 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 FIG. 12(b), the step portion 102T is positioned in the second cavity 133b (see FIG. 5(b)) of the first fixing member 130 in which the inductor portion 120 is disposed, and in FIG. 12(c), the step portion 102T is positioned in the first cavity 133a (see FIG. 5(a)) of the first fixing member 130 in which the magnetic body 140 is disposed.

[0133] 12(b), 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 distance between the inductor unit 120 and the magnetic body 140 is constant, so the inductance value of the inductor unit 120 does not change significantly. On the other hand, in the case of FIG. 12(c), the magnetic body 140 moves due to the core 102 between the hover state of FIG. 10(a) and the contact state of FIG. 10(b), so the inductance value of the inductor unit 120 may change.

[0134] Changes in the resonant frequency due to pressure applied to the core body 102 for each of (a) to (c) of FIG. 12 will be described with reference to FIG.

[0135] In the graph of Figure 13, the line (1) without assembly deviation corresponds to (a) in Figure 12, the line (2) with assembly deviation corresponds to (c) in Figure 12, and the line (3) with assembly deviation corresponds to (b) in Figure 12.

[0136] Referring to FIG. 13, in the case of (3) a line, even if the pressure increases immediately after the core 102 is in a contact state, there is no change in the resonant frequency. A stylus pen sensing device that interacts with the stylus pen 100 cannot sense the writing pressure acting on the core 102. In the case of (2) a line, the resonant frequency changes even when the core 102 is in a hover state, so the stylus pen sensing device can recognize the core 102 in a contact state when it is not in a hover state. As such, due to the assembly deviations in (b) and (c) of FIG. 12, the stylus pen device may have difficulty accurately sensing the stylus pen 100.

[0137] 14(a) to 14(c) are diagrams for explaining problems that occur due to assembly deviations of the connection terminals 165a and 165b when assembling the stylus pen 100 shown in FIGS. 1 to 10. FIG.

[0138] Specifically, FIG. 14(a) shows a case where the connection terminals 165a and 165b are installed as designed without any assembly deviation, and FIG. 14(b) and FIG. 14(c) show a case where the connection terminals 165a and 165b cannot be installed in the designed position due to an assembly deviation that occurs during the assembly process.

[0139] In FIG. 14(a), 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. This position of the connection terminal 165a is the result of proper assembly without deviation. In contrast, in FIGS. 14(b) and 14(c), the connection terminal 165a is positioned in a different position than the pre-designed position due to assembly deviation. Specifically, in FIG. 14(b), the connection terminal 165a is offset a predetermined distance toward the substrate 210, and one end 165a1 presses the ring terminal 161 with considerable force. In FIG. 14(c), the connection terminal 165a is offset a predetermined distance toward the first fixing member 130, and one end 165a1 is spaced a predetermined distance from the ring terminal 161.

[0140] In the case of Fig. 14(b) where an assembly deviation occurs, the connection terminal 165a and the ring terminal 161 are assembled in a state where they are pressed against each other, which increases the pressure required to recognize the contact state of Fig. 10(b). On the other hand, in the case of Fig. 14(c), the ring terminal 161 and the connection terminal 165a are separated from each other in the hover state of Fig. 10(a), so even if pressure is applied to the core 102, the stylus pen sensing device cannot sense the contact state of Fig. 10(b).

[0141] The following Figures 15 to 20 will explain a stylus pen according to another embodiment in which the performance is not significantly affected even if the assembly deviation described with reference to Figures 12 to 14 occurs, and the internal structure is reduced, thereby reducing manufacturing costs.

[0142] 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 part A' of the stylus pen 100' shown in FIG.

[0143] The stylus pen 100' shown in Figures 15 and 16 differs from the stylus pen 100 shown in Figures 1 to 10 in that 1) the first elastic member 180' is made of a spring that is not made of rubber, and 2) the ring terminal 161, connection terminals 165a and 165b, jumping capacitor 215, and the components for electrically connecting these components are omitted from the stylus pen 100 shown in Figures 1 to 10. The remaining components are the same as those of the stylus pen 100 shown in Figures 1 to 10, so a detailed description will be given below of the components that differ from those described above.

[0144] 15 and 16, the first elastic member 180' is configured as a spring. The first elastic member 180' begins to compress at a low pressure (for example, around 10 gf) and can be configured to compress quickly even with a small increase in pressure due to its weak compression strength.

[0145] Figures 17(a) and (b) are views for explaining the first elastic member 180' shown in Figure 16. Figure 17(a) shows a state in which no force is applied to the first elastic member 180', and Figure 17(b) shows that the first elastic member 180' is disposed between the moving member 170 and the second fixed member 190 shown in Figure 16.

[0146] As shown in Figure 17(b), the first elastic member 180' may be sandwiched between the movable member 170 and the second fixed member 190 and placed in a partially compressed (or incompletely compressed) state. The first elastic member 180' will not be compressed unless a force (or repulsive force) greater than the force applied by the movable member 170 and the second fixed member 190 is applied. Here, the force (or repulsive force) may be, for example, around 10 gf. On the other hand, the first elastic member 180' will be compressed if a force greater than the force applied by the movable member 170 is applied.

[0147] The following Equation 1 shows the force (or repulsive force, F) of the partially compressed first elastic member 180'. Equation 1

[0148] In <Equation 1> on TIFF2026501409000002.tif2487, G is the modulus of transverse elasticity of the spring, Na is the number of effective turns of the spring, D is the diameter of the spring, d is the diameter of the wire, and x is the length of the compressed spring (in the negative direction).

[0149] Meanwhile, the first elastic member 180' may be disposed in an uncompressed state between the movable member 170 and the second fixed member 190. Therefore, the stylus pen 100' according to other embodiments of the present invention is not limited to the first elastic member 180' being disposed between the movable member 170 and the second fixed member 190 in a partially compressed state.

[0150] The first elastic member 180 ′ may be configured to react with a relatively greater weight than the elastic body 155 .

[0151] 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.

[0152] Figure 18 (a) to (c) are diagrams for explaining the operation of the stylus pen 100' shown in Figures 15 to 17. Specifically, Figure 18 (a) is a diagram showing a hover state H of the stylus pen 100', Figure 18 (b) is a diagram showing a contact state C of the stylus pen 100', and Figure 18 (c) is a diagram showing a writing pressure state P of the stylus pen 100'.

[0153] Referring to (a) of FIG. 18, in the hover state H, no external force acts on the core body 102, and therefore there is no change in the internal configuration.

[0154] Referring to FIG. 18(b), in contact state C, a predetermined pressure is applied to one end of the core 102. The applied pressure causes the core 102 to move toward the inside of the housing 101. As the core 102 moves, the cover 150 pushes the moving member 170 toward the first elastic member 180′, and the moving member 170 is pushed toward the second elastic member 185. In this state, the first elastic member 180′ is compressed as much as the moving member 170 is pushed. Then, as the core 102 moves, the step portion 102T of the core 102 pushes the magnetic body 140 toward the first elastic member 180′. As the magnetic body 140 is pushed, the distance between the inductor unit 120 and the magnetic body 140 changes. This change in distance changes the inductance value of the inductor unit 120, ultimately changing the resonant frequency.

[0155] 18(c), in the writing pressure state P, a greater pressure than that in the contact state C is applied to one end of the core 102. The greater pressure causes the core 102 to move further inward in the housing 101, thereby moving the magnetic body 140 further away from the inductor unit 120. As the magnetic body 140 is pressed, the elastic body 155 disposed between the cover unit 150 and the magnetic body 140 is compressed. As the moving member 170 moves, the first elastic member 180' is further compressed, and the second elastic member 185 is also compressed. As the magnetic body 140 moves further away from the inductor unit 120, the inductance (L) value of the inductor unit 120 gradually decreases. As the inductance value of the inductor unit 120 decreases, the resonant frequency changes.

[0156] (a) and (b) of Figure 19 are diagrams showing examples of assembly deviations occurring in the core body 102, and Figure 20 is a graph showing the change in resonant frequency depending on the pressure applied to the core body 102 for (a) and (b) of Figure 19, respectively.

[0157] (a) of Figure 19 is a diagram showing that due to an assembly deviation during the assembly process, the step portion 102T of the core body 102 is offset toward the magnetic body 140 and positioned almost attached to one side of the magnetic body 140, and (b) of Figure 19 is a diagram showing that due to an assembly deviation, the step portion 102T of the core body 102 is offset toward the inductor portion 120.

[0158] In the graph of FIG. 20, line (1) corresponds to FIG. 16, which represents the case where no assembly deviation occurs, line (2) corresponds to (a) in FIG. 19, and line (3) corresponds to (b) in FIG. 19.

[0159] 20, the stylus pen according to another embodiment of the present invention including the first elastic member 180′ has less change in performance compared to a case where there is no assembly deviation even if there is some assembly deviation in the core 102. Therefore, it has an advantage over the stylus pen 100 shown in FIG.

[0160] 15 to 18 does not use parts such as jumping capacitor 215, ring terminal 161, and connection terminals 165a and 165b of stylus pen 100 shown in Figures 1 to 9, which has the advantage of simplifying the internal structure and reducing manufacturing costs. Furthermore, groove 194 of second fixed member 190 shown in Figure 7 and part of first groove 177 of moving member 170 shown in Figure 6 are unnecessary in order to accommodate connection terminals 165a and 165b.

[0161] Meanwhile, although not shown in a separate drawing, a stylus pen according to another embodiment of the present invention may have the first elastic member 180 in the stylus pen 100 shown in Figures 1 and 2 replaced with the first elastic member 180' shown in Figures 16 and 17.

[0162] The features, structures, effects, etc. described in the above embodiments are included in one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by a person skilled in the art to which the embodiment belongs. Therefore, content related to such combinations and modifications should be interpreted as being included in the scope of the present invention.

[0163] Furthermore, although the above description has focused on the embodiments, these are merely examples and do not limit the present invention. Those skilled in the art will recognize that various modifications and applications other than those illustrated above are possible within the scope of the essential characteristics of the present invention. For example, each component specifically illustrated in the embodiments can be modified and implemented. Differences related to such modifications and applications should be construed as being included within the scope of the present invention as defined in the appended claims. [Explanation of symbols]

[0164] 100,100':Stylus pen 101: Housing 102: Core body 110: Inner case 115: Guide section 120: Inductor section 130: First fixing member 190: Second fixing member 140: Magnetic material 150: Cover part 155: Elastic body 161: Ring terminal 165a, 165b: Connection terminal 170: Moving parts 180, 180': First elastic member 185: Second elastic member 210, 210': Substrate

Claims

1. an inductor portion; a first elastic member disposed apart from the inductor portion; a core body that is disposed to penetrate the inductor portion and moves toward the first elastic member due to an external force acting on one end of the core body; a magnetic body that is disposed between the inductor portion and the first elastic member, and whose separation distance from the inductor portion changes in conjunction with the core body, The first elastic member is compressed by the movement of the core body.

2. The stylus pen according to claim 1 , wherein the first elastic member is a spring.

3. The stylus pen according to claim 2 , wherein the first elastic member is arranged in a state where at least a portion of the first elastic member is compressed.

4. a second elastic member that surrounds a portion of the first elastic member and is compressed by the movement of the core body; The stylus pen according to claim 2 , wherein the second elastic member is made of a rubber material or a spring.

5. The stylus pen according to claim 1 , wherein the first elastic member is made of a rubber material.

6. a second elastic member that surrounds a portion of the first elastic member and is compressed by the movement of the core body; The stylus pen according to claim 5 , wherein the second elastic member is made of a rubber material that is relatively harder than the first elastic member.

7. a housing in which the inductor portion, the first elastic member, the magnetic body, and the remaining portion of the core body except for one end thereof are disposed; a first fixed member fixedly disposed within the housing; a second fixing member disposed inside the housing at a predetermined distance from the first fixing member; a moving member that moves in conjunction with the core body between the first fixed member and the second fixed member, 7. A stylus pen according to claim 1, 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 direction of the second fixed member.

8. The first fixing member is a first cavity in which the magnetic body is disposed; a second cavity in which a portion of the inductor portion is disposed; a partition wall disposed between the first cavity and the second cavity and having a through hole through which the core body passes, The stylus pen according to claim 7 , wherein the diameter of the through hole of the partition is larger than the diameter of the through hole of the magnetic body.

9. The core body has a step portion formed between the one end and the other end, With respect to the step portion as a reference, the thickness of one end side of the core body is thicker than the thickness of the other end side of the core body, The stylus pen according to claim 7 , wherein the diameters of the through hole of the 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. The stylus pen according to claim 9 , wherein an external force acting on one end of the core body causes the step portion to press one surface of the magnetic body, thereby increasing the distance between the magnetic body and the inductor portion.

11. an inner case disposed inside the housing and surrounding the inductor portion, the first fixed member, the moving member, and the second fixed member; the first fixing member and the second fixing member each include one or more first protrusions protruding from an outer surface thereof; The stylus pen according to claim 7 , wherein the inner case has a first opening in which the first protrusions of the first fixing member and the second fixing member are disposed.

12. the first opening includes a base groove formed to extend along a 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; The stylus pen according to claim 11 , wherein the plurality of extension grooves are formed at positions corresponding to the first protrusions of the first fixing member and the second fixing member.

13. the first fixing member has one or more first grooves formed in an outer surface; The moving member has one or more extensions disposed in the first groove, and one or more first grooves and second grooves formed on an outer surface thereof; the second fixed member includes a first extension and a second extension disposed in the first groove and the second groove of the movable member, respectively; 8. The stylus pen of claim 7, wherein when the movable member moves, the extension of the movable member moves within the first groove of the first fixed member, and the first and second extensions of the second fixed member are positioned within the first and second grooves of the movable member.

14. the second elastic member has a groove; the moving member has a first groove, The stylus pen according to claim 7 when dependent on claim 4 or 6, wherein the second fixed member includes a first extension portion disposed in the groove of the second elastic member and the first groove of the moving member.

15. a capacitor unit including a base capacitor electrically connected to the inductor unit and a jumping capacitor electrically shorted or open to the base capacitor; a substrate on which the capacitor unit is mounted; a ring terminal disposed on one surface of the moving member between the moving member and the first fixed member and moving in conjunction with the moving member; a connection terminal disposed on a side surface of the movable member and the second fixed member, one end of which contacts the ring terminal and the other end of which is coupled to a connection pad of the substrate; The stylus pen of claim 7 , wherein when the moving member is moved, if the ring terminal is separated from one end of the connection terminal, the base capacitor and the jumping capacitor are electrically open to each other.

16. The stylus pen according to claim 15 , wherein the movable member and the second fixed member have grooves on their side surfaces in which the connection terminals are disposed.

17. The movement of the core body changes the distance between the magnetic body and the inductor portion, The inductance value of the inductor section changes depending on the change in the distance, 7. The stylus pen according to claim 1, wherein a resonant frequency of a signal emitted to the outside is changed by changing the inductance value.

18. a cover portion disposed between the other end of the core body and the moving member; an elastic body disposed between the cover portion and the magnetic body; The stylus pen of claim 7 , comprising:

Images