Stylus pen including a sealing member

Abstract

In order to manufacture an EMR type or capacitive resonant stylus pen capable of generating a maximum output signal, how to design an internal resonant circuit and a pen structure is a very important factor.SOLUTION: According to an aspect of the present invention, there is provided a stylus pen including: a housing; and a refill body having one end disposed outside the housing and the other end disposed inside the housing and configured to move in a longitudinal direction by an external force acting on the one end, the refill body being disposed inside the housing, An inductor unit including a ferrite core having a through-hole through which the core body passes and a coil wound around an outer surface of the ferrite core, a capacitor unit electrically connected to the inductor unit to form a resonance circuit, and at least one sealing member configured to block a plurality of moisture inflow paths passing through the core body opening of the housing.SELECTED DRAWING: Figure 54

Description

[Technical Field]

[0001] The present invention relates to a stylus pen, and more particularly to a sealing member capable of blocking one or more moisture inflow paths inside the stylus pen, and a stylus pen including the same. [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] FIGS. 1(a) to 1(c) are diagrams for explaining one requirement of a conventional stylus pen.

[0011] The appearance design of conventional stylus pens, including the stylus pens 10a and 10b shown in FIGS. 1(a) to 1(c), must meet certain requirements in consideration of the user's environment.

[0012] One of the requirements is that the conventional stylus pens 10a and 10b must be capable of drawing when tilted at a predetermined angle (for example, 60°) with respect to a predetermined contact surface 31.

[0013] In particular, with some conventional stylus pens 10a, 10b, when a certain force F is applied after contacting the surface of the display panel 300, the pen tip is pushed and a part of it enters the housing 19. However, even when the pen tip is pushed and tilted at a certain angle (e.g., 60°) in this manner, some stylus pens 10a, 10b should be able to draw without any problems.

[0014] That is, when the conventional stylus pens 10a and 10b are tilted relative to the contact surface 31, the external mechanisms (eg, housing 19) of the stylus pens 10a and 10b must not prevent the stylus pens 10a and 10b from tilting at a predetermined angle (eg, 60°).

[0015] FIG. 2 is a diagram showing a simplified internal structure of a conventional stylus pen.

[0016] The conventional stylus pens 10c and 10d shown in Fig. 2 are composed of a pen tip 11, inductor sections 13 and 13', a capacitor section 15, and a housing 19. In addition to these, there are also other additional components.

[0017] The inductor sections 13, 13' are composed of ferrite cores 131, 131' and a coil 133. The pen tip 11 has a structure in which a part of it is inserted into the through-hole of the ferrite cores 131, 131'.

[0018] The inductor units 13, 13' and the capacitor unit 15 are electrically connected to each other to form an LC resonator unit, which can resonate with a drive signal provided from a transmitter located outside the stylus pens 10c, 10d and is configured to emit a predetermined signal (hereinafter referred to as a pen signal) through resonance.

[0019] The shape of the ferrite core 131' of the inductor unit 13' of the stylus pen 10d shown on the right side of Figure 2 is different from the ferrite core 131 of the inductor unit 13 of the stylus pen 10c shown on the left side. Specifically, the ferrite core 131' of the stylus pen 10d shown on the right side has a shape in which the width becomes narrower as it goes downward (hereinafter referred to as a tapered shape). This tapered shape allows the ferrite core 131' to be positioned closer to the lower end side (or pen tip side) within the housing 19 by a predetermined length H.

[0020] In the conventional stylus pens 10c and 10d shown in Fig. 2, the magnitude of the pen signal received at a receiver located outside the stylus pens 10c and 10d may vary depending on the position of the inductor units 13 and 13' within the housing 19. If possible, it is preferable to determine the position of the inductor units 13 and 13' so that the magnitude of the pen signal is increased.

[0021] 2, the ferrite core 131' of the stylus pen 10d shown on the right side is positioned closer to the end of the pen than the ferrite core 131 of the stylus pen 10c shown on the left side, so the magnitude of the pen signal received by the receiver is relatively larger. However, the tapered shape of the ferrite core 131' of the stylus pen 10d shown on the right side has limitations in maximizing the magnitude of the pen signal received by the receiver.

[0022] Furthermore, it is also important to maximize the magnitude of the pen signal received at the receiver side, while at the same time stably storing the inductor sections 13, 13' inside the housing 19.

[0023] Meanwhile, stylus pens, due to their characteristics, are used in a variety of environments and are therefore susceptible to damage from external factors. In particular, the intrusion of moisture can have a significant impact on the functionality of the stylus pen. Stylus pens contain precision electronic components, and if moisture such as water or humidity gets into them, it can cause corrosion of the components or an electrical short circuit, impairing the functionality of the stylus pen. Such problems shorten the lifespan of the stylus pen and cause inconvenience to users.

[0024] While some stylus pens currently on the market are waterproof, they are not perfect or require expensive special materials, which increases manufacturing costs. Therefore, there is a need to develop a technology that can prevent moisture from entering the inside of a stylus pen in a more efficient and economical way. Summary of the Invention [Problem to be solved by the invention]

[0025] SUMMARY OF THE INVENTION An object of the present invention is to provide a sealing member capable of blocking a plurality of moisture inflow paths of a stylus pen, and a stylus pen including the sealing member.

[0026] Another object of the present invention is to provide a sealing member that can exert an additional effect of blocking a moisture inflow path through the adhesive portion, and a stylus pen including the sealing member.

[0027] Another object of the present invention is to provide a buffer member capable of performing buffering and waterproofing functions, a stylus pen including the same, and a method for minimizing the size of the buffer member. [Means for solving the problem]

[0028] A stylus pen according to an embodiment of the present invention includes a housing, a core having one end disposed outside the housing and the other end disposed inside the housing and configured to move longitudinally in response to an external force acting on the one end, an inductor section disposed inside the housing and including a ferrite core having a through hole through which the core passes and a coil wound on the outer surface of the ferrite core, a capacitor section electrically connected to the inductor section to form a resonant circuit, and at least one sealing member configured to block multiple moisture inflow paths passing through the core opening of the housing.

[0029] Here, the multiple moisture inflow paths may include a first moisture inflow path, which is a path through which moisture passes through the core opening of the housing and flows into the inside of the stylus pen through the space between the housing and the inductor portion, and a second moisture inflow path, which is a path through which moisture passes through the core opening of the housing and flows into the inside of the stylus pen through the through hole of the ferrite core.

[0030] Here, the plurality of sealing members may include a first sealing member configured to block the first moisture inflow path, and a second sealing member configured to block the second moisture inflow path.

[0031] Here, the first sealing member may be disposed to cover at least a portion of an outer surface of the ferrite core and to be in close contact with an inner wall of the housing.

[0032] Here, the housing may further include a fixing bracket fixedly disposed inside the housing and coupled to one end of the ferrite core, and the first sealing member may be disposed to cover at least a portion of an outer surface of the fixing bracket and be in close contact with an inner wall of the housing.

[0033] Here, the housing may further include a fixed bracket fixedly disposed inside the housing and coupled to one end of the ferrite core, the fixed bracket including a partition wall contacting the ferrite core, and the second sealing member may be disposed on the partition wall so that the core fills the outer contour of the through-hole of the partition wall through which the core passes, and may be disposed in close contact with the core at the portion where the core passes through the through-hole of the partition wall.

[0034] A stylus pen according to an embodiment of the present invention includes a housing, a core body having one end disposed outside the housing and the other end disposed inside the housing and configured to move longitudinally due to an external force acting on the one end, an inductor section disposed inside the housing and including a ferrite core having a through hole through which the core body passes and a coil wound on the outer surface of the ferrite core, a capacitor section electrically connected to the inductor section to form a resonant circuit, and a sealing member configured to block the path of moisture passing through the core body opening of the housing and entering the inside of the stylus pen through the through hole of the ferrite core.

[0035] Here, the housing may further include a fixed bracket fixedly disposed inside the housing and coupled to one end of the ferrite core, the fixed bracket including a partition wall contacting the ferrite core, and the sealing member may be disposed on the partition wall so that the core fills the outer contour of the through-hole of the partition wall through which the core passes, and may be disposed so that the sealing member is in close contact with the core at the portion where the core passes through the through-hole of the partition wall.

[0036] Here, the sealing member may include a cylindrical contact portion having a height equal to the length of the core body, and may be disposed so as to be in close contact with the core body at the contact portion.

[0037] Here, the contact portion can maintain at least a portion of the contact portion in contact with the core body when the core body moves in the longitudinal direction.

[0038] A stylus pen according to an embodiment of the present invention includes a housing, a core body having one end disposed outside the housing and the other end disposed inside the housing and configured to move longitudinally due to an external force acting on the one end, an inductor section disposed inside the housing and including a ferrite core having a through hole through which the core body passes and a coil wound around the outer surface of the ferrite core, a capacitor section electrically connected to the inductor section to form a resonant circuit, a buffer member disposed between the inner surface of the housing and the other end of the ferrite core and arranged to cover at least a portion of the other end of the ferrite core, and a sealing member capable of blocking a path through which moisture passes through the core body opening of the housing and enters the interior of the stylus pen through the space between the housing and the inductor section.

[0039] Here, the buffer member may be disposed so as to be in close contact with the housing and the other end of the ferrite core.

[0040] Here, the other end of the ferrite core may have a tapered shape in which the diameter or width decreases toward the end, and may include at least one curved surface portion in which the outer surface is curved inward.

[0041] Here, the buffer member can have a smaller thickness than when the other end of the ferrite core does not include the curved surface portion.

[0042] Here, the sealing member may be disposed to cover an outer surface of the ferrite core and to be in close contact with an inner wall of the housing.

[0043] Here, the housing may further include a fixing bracket fixedly disposed inside the housing and coupled to one end of the ferrite core, and the sealing member may be disposed to cover the fixing bracket and in close contact with the inner wall of the housing.

[0044] In order to solve the problems of the present invention, a stylus pen is provided, comprising: a housing; a core body having one end disposed outside the housing and the remainder disposed inside the housing, configured to move longitudinally in response to an external force acting on the one end; an inductor section disposed inside the housing, including a ferrite core having a through hole through which the core body passes and a coil wound on the outer surface of the ferrite core; a capacitor section electrically connected to the inductor section to form a resonant circuit; and a buffer member disposed between the housing and the other end of the ferrite core, arranged to cover at least a portion of the other end of the ferrite core, and including a fourth sealing member at one end, wherein the sealing member is arranged so that its outer casing is in close contact with the inner wall of the housing.

[0045] According to an embodiment of the present invention, the fourth sealing member may be taped or coated on one surface of the buffer member.

[0046] According to one embodiment of the present invention, the fourth sealing member may be disposed such that an inner periphery thereof is in close contact with the core body or the ferrite core.

[0047] According to an embodiment of the present invention, the inner wall of the fourth sealing member may be spaced apart from the core or ferrite core by a predetermined distance.

[0048] According to an embodiment of the present invention, the magnetic head may further include a third sealing member that covers at least a portion of an outer surface of the ferrite core and is disposed to be in close contact with the housing.

[0049] According to one embodiment of the present invention, the third sealing member may be arranged to abut the coil.

[0050] According to one embodiment of the present invention, the housing may further include a fixing bracket fixedly disposed inside the housing and coupled to one end of the ferrite core, and a first sealing member disposed to cover at least a portion of an outer surface of the fixing bracket and in close contact with the housing.

[0051] According to one embodiment of the present invention, the housing may further include a button portion disposed on the outer surface of the housing, a button bracket fixedly disposed inside the housing and coupled to the button portion, and a packing member coupled to the button bracket and positioned to be in close contact with the button bracket.

[0052] According to one embodiment of the present invention, the device may include: a board bracket fixedly disposed within the housing and covering the capacitor unit; a clicker button configured to move along a longitudinal direction in response to an external force acting on one end thereof; a clicker housing having one end coupled to the housing and disposed within the housing to surround the clicker button; a clicker cover connecting the board bracket and the clicker housing within the housing; and a fifth sealing member disposed to surround a predetermined groove formed in the clicker cover near a portion where the clicker cover and the board bracket are coupled, wherein the fifth sealing member may be disposed to be in close contact with the housing. [Effects of the Invention]

[0053] By using a stylus pen according to an embodiment of the present invention, a waterproof function can be achieved by blocking a plurality of water inflow paths of the stylus pen.

[0054] In addition, the special shape of the sealing member can provide an additional effect of blocking the path of moisture intrusion.

[0055] Also, the size of the shock-absorbing member that performs shock-absorbing and waterproof functions can be minimized. [Brief explanation of the drawings]

[0056] [Figure 1] FIGS. 1(a) to 1(c) are diagrams for explaining one requirement of a conventional stylus pen. [Figure 2] FIG. 2 is a diagram showing a simplified internal structure of a conventional stylus pen. [Figure 3] FIG. 3 is a perspective view of a stylus pen 100 according to one embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view of part A of the stylus pen 100 shown in FIG. [Figure 5] FIG. 5 is a detailed cross-sectional view of the inductor section 120 shown in FIG. [Figure 6] 6(a) and 6(b) are diagrams illustrating the internal configuration of the stylus pen according to an embodiment of the present invention shown in FIGS. 4 and 5 and the effects thereof. [Figure 7] 7A to 7C are diagrams for explaining in more detail the internal structure and effects of the stylus pen according to an embodiment of the present invention shown in FIGS. 4 and 5. FIG. [Figure 8] FIG. 8 is a diagram illustrating the increase in the magnitude of the pen signal according to the predetermined height S shown in (a) to (c) of FIG. [Figure 9] FIG. 9 is a cross-sectional view of a portion of the stylus pen 100 shown in FIG. [Figure 10] FIG. 10(a) is a perspective view for explaining the structure of the inner case 110 and the buffer member 115 shown in FIG. 9, and FIG. 10(b) is a perspective view of only the inner case 110. FIG. [Figure 11] FIG. 11 is a perspective view of the device shown in FIG. 10(a) with the inner case 110 removed. [Figure 12] 12(a) and 12(b) are perspective views of the first fixing member 130 shown in FIGS. 9 and 11, viewed from various sides. [Figure 13]13(a) and 13(b) are perspective views of the moving member 170 shown in FIGS. 9 and 11, viewed from various sides. [Figure 14] 14(a) and 14(b) are perspective views of the second fixing member 190 shown in FIGS. 9 and 11, viewed from various sides. [Figure 15] FIG. 15 is a perspective view of the partial configuration shown in FIGS. 9 and 11, seen from one side. [Figure 16] 16(a) and 16(b) are perspective views of only a portion of the configuration shown in FIGS. 9 and 11. FIG. [Figure 17] 17(a) to 17(c) are diagrams for explaining the operation of the stylus pen 100 shown in FIGS. 9 to 16. FIG. [Figure 18] Fig. 18(a) is a diagram showing an example of the change in the LC value of the resonant circuit unit due to the operations of Fig. 17(a) to (c), and Fig. 18(b) is a graph showing the frequency characteristics in each of the operation states of Fig. 17(a) to (c). [Figure 19] 19(a) to 19(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. 9 to 17. FIG. [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) to (c) of FIG. [Figure 21] 21(a) to 21(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. 9 to 17. FIG. [Figure 22] FIG. 22 is a cross-sectional view of a portion of a stylus pen according to a modified embodiment of the stylus pen 100 shown in FIG. [Figure 23] 23(a) and 23(b) are views for explaining the first elastic member 180' shown in FIG. [Figure 24]24(a) to 24(c) are diagrams for explaining the operation of the stylus pen shown in FIGS. 22 and 23. In FIG. [Figure 25] 25(a) and 25(b) are diagrams showing an example in which assembly deviation occurs in the core body 102. In FIG. [Figure 26] FIG. 26 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. [Figure 27] FIG. 27 is a perspective view of a modified example of the ferrite core 121 shown in FIGS. [Figure 28] 28(a) is an enlarged front view of a portion of the ferrite core 121' shown in FIG. 27, and FIG. 28(b) is a cross-sectional view taken along line A-A' in FIG. 28(a). [Figure 29] FIG. 29 is a cross-sectional view of a stylus pen to which another modified example of the ferrite core 121 shown in FIG. 4 is applied. [Figure 30] FIG. 30 is a cross-sectional view showing only the ferrite core 121'' and the coil portion 123 shown in FIG. [Figure 31] FIG. 31 is a perspective view of the ferrite core 121'' shown in FIGS. [Figure 32] 32(a) is an enlarged front view of a portion of the ferrite core 121'' shown in FIG. 31, and FIG. 32(b) is a cross-sectional view taken along line BB' in FIG. 31(a). [Figure 33] FIG. 33 is a perspective view of a stylus pen 1000 according to another embodiment of the present invention. [Figure 34] FIG. 34 is a cross-sectional view of a portion of the stylus pen 1000 shown in FIG. [Figure 35] FIG. 35 is a perspective view of the stylus pen 1000 shown in FIG. 33 with the housing 1010 removed. [Figure 36] FIG. 36 is a perspective view of only the fixed bracket 1600 shown in FIG. [Figure 37]FIG. 37 is a perspective view of the fixing bracket 1600 shown in FIG. 36, seen from another direction. [Figure 38] FIG. 38 is a partial perspective view of FIG. 35 seen from another direction. [Figure 39] FIG. 39 is a perspective view of the inductor section 1200 and the fixing bracket 1600 shown in FIG. 35 removed. [Figure 40] FIG. 40 is a perspective view of FIG. 39 seen from another direction. [Figure 41] FIG. 41 is a cross-sectional view of FIG. [Figure 42] FIG. 42 is a perspective view of only the elastic member 1800 shown in FIG. [Figure 43] FIG. 43 is a perspective view of the board bracket 1900 and board 2100 shown in FIG. [Figure 44] FIG. 44 is a diagram illustrating the movement of the moving bracket 1300 in accordance with the movement of the core body 1020 shown in FIGS. 35 to 43, and the electrical contact and release between the fixed bracket 1600 and the moving bracket 1300. [Figure 45] Figure 45 is a diagram of (A) and (B) in Figure 44, respectively. [Figure 46] FIG. 46 shows a simplified stylus pen according to another embodiment of the present invention, configured as an equivalent circuit diagram for each of (A) and (B) of FIG. [Figure 47] FIG. 47 is a perspective view of the stylus pen 1000 according to another embodiment of the present invention shown in FIG. 33, viewed from the side of the core body 1020. In FIG. [Figure 48] (A) of Figure 48 is a part of a cross-sectional view taken along line A-A' of the stylus pen 1000 shown in Figure 47. (B) of Figure 48 is a part of a cross-sectional view taken along line B-B' of the stylus pen 1000 shown in Figure 47. [Figure 49] FIG. 49 shows side views A and B and a cross-sectional view of the ferrite core 1210 shown in FIGS. [Figure 50a]FIG. 50a is a view showing a first moisture inflow path and a second moisture inflow path through which moisture flows in through a core opening of a housing in the stylus pen shown in FIG. [Figure 50b] FIG. 50b is a view showing a first moisture inflow path and a second moisture inflow path through which moisture flows in through the core opening of the housing in the stylus pen shown in FIG. [Figure 51a] FIG. 51a is a view showing an embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in FIG. 50a. [Figure 51b] FIG. 51b is a view showing an embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in FIG. 50b. [Figure 52a] FIG. 52a is a view showing another embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in FIG. 50a. [Figure 52b] FIG. 52b is a view showing another embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in FIG. 50b. [Figure 53a] FIG. 53a is a view showing an embodiment of a sealing member for blocking the second moisture inflow path in the stylus pen shown in FIG. 50a. [Figure 53b] FIG. 53b is a view showing an embodiment of a sealing member for blocking the second moisture inflow path in the stylus pen shown in FIG. 50b. [Figure 54] FIG. 54 is a diagram showing the stylus pens shown in FIGS. 50a and 50b to which a first sealing member and a second sealing member are further added. [Figure 55] FIG. 55 is a drawing showing a modification of the sealing member shown in FIGS. 53a and 53b. [Figure 56] FIG. 56 is a view showing yet another embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in FIG. 50b. [Figure 57]FIG. 57 is a view showing an embodiment of a buffer member for blocking the first and second moisture inflow paths in the stylus pen shown in FIG. 50b. [Figure 58] FIG. 58 is a view showing a stylus pen including the sealing member shown in FIG. 56 and the buffer member shown in FIG. [Figure 59] FIG. 59 is a view showing a third moisture inflow path through which moisture flows in via the button portion of the stylus pen shown in FIG. [Figure 60] FIG. 60 is a view showing a fourth moisture inflow path through which moisture enters through the coupling portion between the housing and the rear bracket in the stylus pen shown in FIG. [Figure 61] FIG. 61 is a view showing a packing member for blocking the third moisture inflow path in the stylus pen shown in FIG. [Figure 62] FIG. 62 is a view showing an embodiment of a sealing member for blocking the fourth moisture inflow path in the stylus pen shown in FIG. [Figure 63] FIG. 63 is a diagram showing a plurality of waterproofing means provided in the stylus pen shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0057] 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.

[0058] FIG. 3 is a perspective view of a stylus pen 100 according to one embodiment of the present invention.

[0059] Referring to FIG. 3, a stylus pen 100 according to an embodiment of the present invention includes a housing 101 and a core body 102.

[0060] The housing 101 forms the exterior of the stylus pen 100. The housing 101 has a predetermined space formed inside and is elongated in one direction. The housing 101 may be formed by combining two or more parts together, or may be formed as a single, integrated part.

[0061] The housing 101 may be made of a non-conductive synthetic resin material.

[0062] 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.

[0063] A button unit 109 may be arranged on the housing 101. The button unit 109 may be arranged on the outer surface of the middle of the second housing 101b. The button unit 109 may be for performing a specific operation of the stylus pen 100. For example, it may be a mechanical or contact button for a cancel operation.

[0064] The core 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. Here, the one end portion of the core 102 may also be called a pen tip.

[0065] An external force can move a portion of one end of the core body 102 into the housing 101. As the external force increases, the volume of the portion of the one end of the core body 102 that enters the housing 101 can increase. When the applied external force decreases, the portion of the one end of the core body 102 moves out of the housing 101 again due to the mechanical action of the components inside the housing 101. When the external force is removed, the portion of the one end of the core body 102 returns to its original state.

[0066] The internal structure of the housing 101 will be described below with reference to FIGS.

[0067] 4 is a cross-sectional view of part A of the stylus pen 100 shown in FIG. 3, and FIG. 5 is a detailed cross-sectional view of the inductor section 120 shown in FIG.

[0068] 4 and 5, a stylus pen 100 according to an embodiment of the present invention includes a buffer member 115, an inductor unit 120, and a capacitor unit (not shown) disposed inside a housing 101.

[0069] The buffer member 115 is disposed inside the housing 101, and is disposed between one end of the ferrite core 121 and the inner surface of the housing 101. The buffer member 115 may be disposed inside the tapered portion 101t of the housing 101. Here, the tapered portion 101t of the housing 101 is a portion adjacent to one end of the core body 102 among both ends of the housing 101, and has a shape in which the width and diameter decrease toward the end of the one end of the housing 101.

[0070] The buffer member 115 has a conical or polygonal pyramid shape and has a through hole through which one end of the ferrite core 121 and the body 102a of the core 102 pass. The inner surface defining the through hole may have a shape corresponding to the outer surface of one end of the ferrite core 121 and the outer surface of the body 102a of the core 102. Here, the body 102a of the core 102 refers to the portion of the core 102 that is elongated in one direction and is disposed within the through hole of the ferrite core 121.

[0071] The buffer member 115 may be made of an elastic material such as rubber to act as a buffer between the ferrite core 121 and the housing 101. The buffer member 115 can protect the housing 101, the ferrite core 121, etc., and block external electrical or magnetic influences.

[0072] The buffer member 115 has a shape that covers one end of the ferrite core 121 or the lower end 121 b of the ferrite core 121 .

[0073] An imaginary tangent line L1, which is commonly tangent to the tapered portion 101t of the housing 101 and a portion of the core 102 (or the pen tip) disposed outside the housing 101, forms a predetermined angle θ with the central axis Y of the core 102. Here, the predetermined angle θ is preferably within 30°. If the predetermined angle θ is within 30°, drawing is possible even when the stylus pen according to an embodiment of the present invention is tilted at an angle of 60° with respect to the contact surface.

[0074] The inductor unit 120 may form an LC resonator together with a capacitor unit (not shown). 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 varied depending on the change in the inductance (L) value of the inductor unit 120 and the capacitance (C) value of the capacitor unit (not shown).

[0075] The inductor portion 120 includes a ferrite core 121 and a coil portion 123 wound around the outer surface of the ferrite core 121 .

[0076] The coil portion 123 may be wound around the ferrite core 121 in at least one layer.

[0077] The ferrite core 121 may have an overall cylindrical or polygonal cylindrical shape, and may have a through-hole 121h formed therethrough along the longitudinal direction of the ferrite core 121.

[0078] The ferrite core 121 has a through-hole 121h therein through which the body 102a of the core 102 passes. The body 102a of the core 102 can move linearly back and forth along the longitudinal direction via the through-hole 121h.

[0079] One end of the ferrite core 121 may have a tapered shape in which the diameter or width decreases toward the end. Here, the outer surface of the tapered end may include at least one curved portion 121c that is curved inward.

[0080] The ferrite core 121 may include an upper end portion 121a and a lower end portion 121b disposed below the upper end portion 121a. Here, the upper end portion 121a and the lower end portion 121b may be integrally formed.

[0081] The upper end 121a has a cylindrical, elliptical, or polygonal cylindrical shape. The diameter or width of the cylinder or polygonal cylinder may be constant as shown in the drawings. Alternatively, the diameter or width of the cylinder, elliptical, or polygonal cylinder may not be constant, and may be different from the diameter or width of a portion that has a different diameter or width.

[0082] The upper end portion 121a has a part of a through-hole 121h formed therein, through which the body 102a of the core member 102 passes. A coil portion 123 is disposed on the outer surface of the upper end portion 121a.

[0083] The lower end portion 121b has the remainder of a through-hole 121h formed therein, through which the body 102a of the core member 102 passes.

[0084] The bottom end 121b has a tapered shape that narrows from top to bottom, but at least a portion of the outer surface of the bottom end 121b has a curved portion 121c that curves inward of the bottom end 121b. The number of curved portions 121c may be at least one. The technical effects of a stylus pen according to an embodiment of the present invention, including a ferrite core 121 having such a curved portion 121c, will be described below with reference to the drawings.

[0085] Figures 6(a) and 6(b) are diagrams illustrating the internal configuration and effects of the stylus pen according to an embodiment of the present invention shown in Figures 4 and 5. Specifically, Figure 6(b) is a cross-sectional view of the stylus pen according to an embodiment of the present invention shown in Figures 4 and 5, and Figure 6(a) is a cross-sectional view of the stylus pen when the ferrite core 121 of Figure 6(b) is replaced with the ferrite core 131' shown on the right side of Figure 2.

[0086] Referring to Figures 6(a) and 6(b), the stylus pen according to one embodiment of the present invention shown in Figure 6(b) can position the ferrite core 121 further below the ferrite core 131' shown in Figure 6(a) by a predetermined length S.

[0087] According to this configuration, when the stylus pen according to an embodiment of the present invention is used, the inductor unit 120 including the ferrite core 121 can be brought closer to the receiver (not shown) disposed below the core 102 of the stylus pen. Therefore, there is an advantage in that the magnitude of the pen signal sensed by the receiver is further increased. This is possible because the thickness (between the inner surface and the outer surface) of the buffer member 115 can be reduced due to the shape of the ferrite core 121 of the stylus pen according to an embodiment of the present invention. This will be described in detail with reference to FIG. 7.

[0088] Figures 7(a) to 7(c) are diagrams for explaining in more detail the internal configuration and effects of the stylus pen according to an embodiment of the present invention shown in Figures 4 and 5. Specifically, Figure 7(a) is the same as Figure 6(a), Figure 7(b) is the same as Figure 6(b), and Figure 7(c) is a diagram in which the ferrite core 121 is disposed in the same position as the ferrite core 131' in Figure 7(a).

[0089] 7(a), the buffer member 115' has a certain thickness T2 between its inner and outer surfaces. The more the thickness T2 is minimized, the lower the ferrite core 131' can be positioned as far as possible within the tapered portion 101t of the housing 101. However, there is a limit to the thickness T2 due to the structure of the buffer member 115' and other manufacturing process considerations.

[0090] Here, assuming that the thickness T2 is the minimum thickness that the buffer member 115' can have due to the structure of the buffer member 115' or other manufacturing process reasons, when the conventional ferrite core 131' is positioned at the lowest end within the housing 101, it becomes as shown in Figure 7(a).

[0091] Referring to (c) of FIG. 7, the ferrite core 121 is disposed at the same position as the ferrite core 131' in (a) of FIG. 7. However, since the ferrite core 121 has a curved surface portion 121c, correspondingly, the buffer member 115'' has a structural difference from the buffer member 115' shown in (a) of FIG. 7. Specifically, the inner surface of the buffer member 115'' has a convex curved surface corresponding to the curved surface portion 121c of the ferrite core 121.

[0092] The thickness between the outer surface of the buffer member 115'' and the inner surface formed by a curved surface varies depending on the position. Specifically, the upper and lower ends of the inner surface of the buffer member 115'' have a minimum thickness of T2 from the outer surface, and the middle portion of the inner surface of the buffer member 115'' has a thickness between T2 and T1 (>T2).

[0093] In (c) of FIG. 7, at least a part (the upper and lower ends) of the buffer member 115'' satisfies the minimum thickness of T2, and the thickness of the middle portion of the buffer member 115'' has a thickness T1 greater than the minimum thickness of T2. Thus, since the thickness T1 of the middle portion of the buffer member 115'' is thicker than T2, there is an advantage that it is easier to manufacture the buffer member 115'' than the conventional buffer member 115' in (a) of FIG. 7 when manufacturing the buffer member 115''.

[0094] Referring to (b) of FIG. 7, the inner surface of the buffer member 115 is formed by a curved surface due to the curved surface portion 121c of the ferrite core 121. The upper and lower ends of the inner surface of the buffer member 115 have a thickness of T3 (<T2) with the outer surface of the buffer member 115, and the middle portion of the inner surface of the buffer member 115 has a thickness between T3 and T2 with the outer surface of the buffer member 115.

[0095] In Figure 7(b), although the minimum thickness T2 cannot be met at the top and bottom of the buffer member 115, the minimum thickness T2 is met at the middle of the buffer member 115, so it may be possible to manufacture the buffer member 115. The buffer member 115 manufactured in this manner has a thinner minimum thickness than the buffer members 115' and 115'' shown in Figures 7(a) and 7(c), so the volume of the buffer member 115 can be further reduced. Therefore, the buffer member 115 can be disposed further downward from inside the tapered portion 101t of the housing 101, and therefore the ferrite core 121 can be disposed further downward by a predetermined height S than in Figures 7(a) and 7(c).

[0096] FIG. 8 is a diagram illustrating the increase in the magnitude of the pen signal according to the predetermined height S shown in (a) to (c) of FIG.

[0097] Referring to the table shown in FIG. 8, it can be seen that as the predetermined height S increases, the magnitude of the pen signal received at the receiver increases.

[0098] 4 to 7, the stylus pen 100 according to an embodiment of the present invention has a tapered portion of the ferrite core 121 of the inductor unit 120 that has a different shape from the conventional ferrite core 131', which allows the thickness of the buffer member 115 to be further reduced and the ferrite core 121 to be positioned closer to the end of the core body 102 inside the housing 101. Therefore, a receiver that receives a pen signal emitted from the stylus pen 100 according to an embodiment of the present invention can obtain a larger pen signal, thereby improving the stylus pen detection sensitivity at the receiver.

[0099] Meanwhile, the receiver mentioned above refers to a module or device that receives a pen signal emitted from the stylus pen 100 according to an embodiment of the present invention. The receiver may be a general digitizer or a display panel. The display panel may have at least one loop pattern made of a conductive material. The loop pattern may be coupled to a touch sensor or may be coupled to the display panel separately from the touch sensor.

[0100] Hereinafter, a detailed internal structure of the stylus pen 100 according to an embodiment of the present invention to which the ferrite core 121 and the buffer member 115 shown in FIGS. 4 to 7 are applied will be described with reference to the drawings.

[0101] 9 is a cross-sectional view of a portion of the stylus pen 100 according to an embodiment of the present invention shown in FIG. 3, FIG. 10(a) is a perspective view for explaining the structure of the inner case 110 and the buffer member 115 shown in FIG. 9, FIG. 10(b) is a perspective view of only the inner case 110, FIG. 11 is a perspective view of the case where the inner case 110 shown in FIG. 10(a) is removed, and FIGS. 12(a) and 12(b) are perspective views of the first fixing member 13 shown in FIGS. 9 and 11. 11, (a) and (b) of FIG. 13 are perspective views of the movable member 170 shown in FIGS. 9 and 11, viewed from various sides; (a) and (b) of FIG. 14 are perspective views of the second fixed member 190 shown in FIGS. 9 and 11, viewed from various sides; FIG. 15 is a perspective view of a portion of the configuration shown in FIGS. 9 and 11, viewed from one side; and (a) and (b) of FIG. 16 are perspective views of only a portion of the configuration shown in FIGS. 9 and 11.

[0102] Referring to FIG. 9, the stylus pen 100 includes at least two of an inner case 110, a buffer member 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 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.

[0103] 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 contact 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.

[0104] 9 and 10(a) and (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.

[0105] 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.

[0106] 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.

[0107] The buffer member 115 may be disposed between the inductor 120 and the housing 101, and between the core 102 and the inner case 110. The buffer member 115 has a through-hole through which the core 102 passes. The buffer member 115 can guide the position of the core 102, stably fix the inductor section 120, and shield the inductor section 120 from external electrical or magnetic influences. The buffer member 115 may be configured separately from the inner case 110, but is not limited thereto, and the buffer member 115 may be configured integrally with the inner case 110.

[0108] 9 and 11, buffer member 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 buffer member 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.

[0109] 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.

[0110] 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 buffer member 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").

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 9, 11, 12(a) and 12(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. 9 is disposed in the first cavity 133a, and one end of the ferrite core 121 of the inductor unit 120 shown in FIG. 9 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.

[0116] 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.

[0117] The first fixing member 130 may have a large number of first protrusions 131 arranged on its outer surface, as described above.

[0118] 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.

[0119] 9, 11, and 13(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.

[0120] 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. 9 is disposed in the first cavity 173a, and a portion of the cover part 150 shown in FIG. 9 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.

[0121] 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.

[0122] 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. 14 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.

[0123] 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.

[0124] 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. 16(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.

[0125] 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.

[0126] The moving member 170 includes a surface 179 in which the first cavity 173a is disposed, and the ring terminal 161 shown in FIGS. 9 and 15 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.

[0127] 9, 11, and 14, 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.

[0128] 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. 9 is disposed. The second elastic member 185 shown in Fig. 9 is disposed on the one surface 191a of the base portion 191.

[0129] 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. 9 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.

[0130] 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 Figures 9 and 11.

[0131] 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.

[0132] 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. 9 and 11 may be disposed in the groove 194.

[0133] 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. 9 and 11 is disposed.

[0134] 9 and 11 to be connected to a substrate 210 disposed in a cavity 197. The other ends of the connection terminals 165a and 165b may be disposed in the openings 198 and connected to connection pads 211a and 211b of the substrate 210.

[0135] 9, 11, 15, and 16(a) and (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.

[0136] 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 the core body 102. 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 .

[0137] The magnetic body 140 is disposed inside the first cavity 133a of the first fixing member 130 shown in Fig. 12 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.

[0138] The magnetic body 140 may be a ferrite chip.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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. 9 by soldering or the like.

[0146] 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. 13 and in the groove 194 of the second fixed member 190 shown in FIG. 14, and may be guided by the first extension portion 199 of the second fixed member 190.

[0147] 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.

[0148] The first elastic member 180 may have one end disposed in the cavity 195 of the second fixed member 190 shown in FIG. 14, and the other end disposed in the first cavity 173a of the moving member 170 shown in FIG.

[0149] 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.

[0150] Meanwhile, the second elastic member 185 may be a spring configured to react to a relatively heavier force than the first elastic member 180.

[0151] The second elastic member 185 is configured to have a thickness in the longitudinal direction that is thinner than that of the first elastic member 180 and a diameter in the vertical direction that is wider than that of the first elastic member 180 .

[0152] 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.

[0153] 16(b), the second elastic member 185 may have a groove 185g that is sandwiched between 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.

[0154] Hereinafter, the operation of the stylus pen 100 according to the embodiment shown in FIGS. 9 to 16 will be described with reference to FIG.

[0155] Figure 17 (a) to (c) are diagrams for explaining the operation of the stylus pen 100 shown in Figures 9 to 16. Specifically, Figure 17 (a) is a diagram showing a hover state H of the stylus pen 100, Figure 17 (b) is a diagram showing a contact state C of the stylus pen 100, and Figure 17 (c) is a diagram showing a writing pressure P state of the stylus pen 100.

[0156] 17(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.

[0157] Referring to FIG. 17(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 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.

[0158] Referring to FIG. 17(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 120, the inductance (L) value of the inductor 120 gradually decreases. The capacitance of the capacitor (not shown) remains the same as in the contact state C. As the inductance value of the inductor 120 decreases, the resonant frequency changes.

[0159] Figure 18(a) shows an example of the change in the LC value of the resonant circuit unit due to the operations of Figure 17(a) to (c), where the Th section shows the hover state of Figure 17(a), the Tc point shows the contact state of Figure 17(b), and the Tp section shows the pen pressure state of Figure 17(c). Figure 18(b) is a graph showing the frequency characteristics in each of the operation states of Figure 17(a) to (c).

[0160] Referring to (a) of FIG. 18, 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 (a) of FIG. 18, 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 as the writing pressure gradually increases.

[0161] 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 (b) of FIG. 18, the frequency characteristics of the resonant signal Vpen output from the resonant circuit unit may be such that the resonant frequency increases (hover state < contact state < writing pressure state) and the Q value decreases (hover state > contact state > writing pressure state) as the movement distance of the core 102 increases, i.e., as the writing pressure increases.

[0162] 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.

[0163] As described above, the stylus pen 100 according to the embodiment shown in Figures 9 to 16 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.

[0164] Meanwhile, in the stylus pen according to the embodiment shown in Figures 9 to 16, 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 19 to 21.

[0165] 19(a) to 19(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. 9 to 17. FIG.

[0166] Specifically, Figure 19(a) shows a case where the core body 102 is installed as designed without any assembly deviation, while Figure 19(b) and Figure 19(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.

[0167] In (a) of FIG. 19, 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 (b) and (c) of FIG. 19, 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. 19, the step portion 102T is positioned in the second cavity 133b (see (b) of FIG. 12) of the first fixing member 130 in which the inductor portion 120 is disposed, and in (c) of FIG. 19, the step portion 102T is positioned in the first cavity 133a (see (a) of FIG. 12) of the first fixing member 130 in which the magnetic body 140 is disposed.

[0168] 19(b), where an assembly deviation occurs, even if pressure is applied to the core 102 immediately after the contact state of FIG. 17(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. 19(c), the magnetic body 140 moves due to the core 102 between the hover state of FIG. 17(a) and the contact state of FIG. 17(b), so the inductance value of the inductor unit 120 may change.

[0169] Changes in the resonant frequency due to pressure applied to the core body 102 for each of (a) to (c) of FIG. 19 will be described with reference to FIG.

[0170] In the graph of Figure 20, the line (1) without assembly deviation corresponds to (a) in Figure 19, the line (2) with assembly deviation corresponds to (c) in Figure 19, and the line (3) with assembly deviation corresponds to (b) in Figure 19.

[0171] Referring to FIG. 20, 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 of (b) and (c) in FIG. 19, the stylus pen device may have difficulty accurately sensing the stylus pen 100.

[0172] 21(a) to 21(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. 9 to 17. FIG.

[0173] Specifically, Figure 21(a) shows a case where the connection terminals 165a and 165b are installed as designed without any assembly deviation, while Figure 21(b) and Figure 21(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.

[0174] In FIG. 21(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. 21(b) and 21(c), the connection terminal 165a is positioned in a different position than the pre-designed position due to assembly deviation. Specifically, in FIG. 21(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. 21(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.

[0175] In the case of Fig. 21(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. 17(b). On the other hand, in the case of Fig. 21(c), the ring terminal 161 and the connection terminal 165a are separated from each other in the hover state of Fig. 17(a), so even if pressure is applied to the core 102, the stylus pen sensing device cannot sense the contact state of Fig. 17(b).

[0176] The following Figures 22 to 26 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 19 to 21 occurs, and the internal structure is reduced, thereby reducing manufacturing costs.

[0177] The stylus pen shown in Figure 22 differs from the stylus pen 100 shown in Figures 9 to 17 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 9 to 17. The remaining components are the same as those of the stylus pen 100 shown in Figures 9 to 17, so a detailed description will be given below of the components that differ from those described above.

[0178] 22, 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.

[0179] Figures 23(a) and (b) are views for explaining the first elastic member 180' shown in Figure 22. Figure 23(a) shows a state in which no force is applied to the first elastic member 180', and Figure 23(b) shows that the first elastic member 180' is disposed between the moving member 170 and the second fixed member 190 shown in Figure 22.

[0180] As shown in Figure 23 (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 second elastic member 190 will be compressed if a force greater than the force applied by the movable member 170 is applied.

[0181] The following Equation 1 shows the force (or repulsive force, F) of the partially compressed first elastic member 180'.

[0182] Formula In <Equation 1> on TIFF2026002782000002.tif25158, G is the transverse elastic modulus of the spring, Na is the effective number of windings 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).

[0183] 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 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.

[0184] The first elastic member 180 ′ may be configured to react with a relatively greater weight than the elastic body 155 .

[0185] Hereinafter, the operation of the stylus pen according to the other embodiment shown in FIGS. 22 and 23 will be described with reference to FIG.

[0186] Figure 24 (a) to (c) are diagrams for explaining the operation of the stylus pen shown in Figures 22 and 23. Specifically, Figure 24 (a) is a diagram showing the hover state H of the stylus pen, Figure 24 (b) is a diagram showing the contact state C of the stylus pen, and Figure 24 (c) is a diagram showing the writing pressure state P of the stylus pen.

[0187] Referring to (a) of FIG. 24, in the hover state H, no external force acts on the core body 102, and therefore there is no change in the internal configuration.

[0188] Referring to FIG. 24(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.

[0189] Referring to (c) of FIG. 24, 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 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.

[0190] (a) and (b) of Figure 25 are diagrams showing examples of assembly deviations occurring in the core body 102, and Figure 26 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 25, respectively.

[0191] (a) of Figure 25 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 25 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.

[0192] In the graph of FIG. 26, line (1) corresponds to FIG. 22, which represents the case where no assembly deviation occurs, line (2) corresponds to (a) in FIG. 25, and line (3) corresponds to (b) in FIG. 25.

[0193] 26, 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.

[0194] 22 to 24 does not use parts such as jumping capacitor 215, ring terminal 161, and connection terminals 165a and 165b in stylus pen 100 shown in Figures 9 to 16, which has the advantage of simplifying the internal structure and reducing manufacturing costs. Furthermore, groove 194 of second fixed member 190 shown in Figure 14 and part of first groove 177 of moving member 170 shown in Figure 13 are unnecessary in order to accommodate connection terminals 165a and 165b.

[0195] 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 FIG. 9 replaced with the first elastic member 180' shown in FIGS. 22 and 23.

[0196] Meanwhile, although not shown in a separate drawing, the ferrite core 121 and the buffer member 115 shown in FIG. 4 can be applied as is not only to the stylus pens mentioned in FIGS. 9 to 26 but also to other conventional stylus pens.

[0197] Figure 27 is a perspective view of a modified example of the ferrite core 121 shown in Figures 4 and 5, (a) of Figure 28 is an enlarged front view of a portion of the ferrite core 121' shown in Figure 27, and (b) of Figure 28 is a cross-sectional view taken along line A-A' in (a) of Figure 28.

[0198] 27 and 28, the ferrite core 121' has a cylindrical shape. A flat surface 121d may be disposed on at least a portion of the outer surface of the ferrite core 121'. A flat surface corresponding to the flat surface 121d may also be disposed on another portion of the outer surface of the ferrite core 121'. The flat surface 121d allows the ferrite core 121' to be stably disposed inside the housing.

[0199] The ferrite core 121' has a cylindrical upper end 121a' and a lower end 121b', and the lower end 121b' may have at least two curved portions 121c'. The curved portions 121c' may be curved from the outer surface of the lower end 121b' to a portion adjacent to the through-hole 121h of the ferrite core 121'. The curved portions 121c' may be disposed on both sides of the lower end 121b' facing each other with respect to the through-hole 121h.

[0200] The curved surface portion 121c of the ferrite core 121 shown in Figures 4 and 5 may be arranged on the entire outer surface of the lower end portion 121b', but the curved surface portion 121c' of the ferrite core 121' in Figures 27 and 28 may be arranged on only a portion of the outer surface of the lower end portion 121b'.

[0201] The flat portion 121d may be disposed on each of the upper end portion 121a' and the lower end portion 121b', and may be connected to each other and disposed continuously. Here, the flat portion 121d disposed on the lower end portion 121b' may be disposed between two curved portions 121c' disposed facing each other on the outer surface of the lower end portion 121b'.

[0202] The ferrite core 121′ shown in Figures 27 and 28 may be alternatively applied to the stylus pens shown in Figures 9 to 26. In this case, the buffer member (not shown) may have a shape that can cover a portion of the lower end 121b′ of the ferrite core 121′.

[0203] Figure 29 is a cross-sectional view of a stylus pen to which another modified example of the ferrite core 121 shown in Figure 4 is applied, Figure 30 is a cross-sectional view showing only the ferrite core 121'' and the coil portion 123 shown in Figure 29, Figure 31 is an oblique view of the ferrite core 121'' shown in Figures 29 and 30, (a) of Figure 32 is an enlarged front view of a portion of the ferrite core 121'' shown in Figure 31, and (b) of Figure 32 is a cross-sectional view along B-B' in (a) of Figure 31.

[0204] 29 to 31, a ferrite core 121'' according to another modification includes an upper end 121a'' and a lower end 121b''.

[0205] The lower end 121b'' has a tapered shape, and the outer surface of the lower end 121b'' includes at least one step 121c''.

[0206] The step portion 121c'' may be disposed over the entire outer surface of the lower end portion 121b'', or may be disposed over a portion of the outer surface as shown in FIGS.

[0207] The step portion 121c'' may include a first surface 121c1, a second surface 121c2 connected to the first surface 121c1, and a third surface 121c3 connected to the second surface 121c2. The first surface 121c1 may be a surface perpendicular to the penetration direction of the through hole 121h, and the third surface 121c3 may be a surface parallel to the penetration direction of the through hole 121h. The second surface 121c2 may connect the first surface 121c1 and the third surface 121c3. Here, although not shown in a separate drawing, the second surface 121c2 may be a curved surface curved inward or outward.

[0208] The ferrite core 121'' has a cylindrical shape. A flat surface 121d may be arranged on at least a portion of the outer surface of the ferrite core 121''. A flat surface corresponding to the flat surface 121d may also be arranged on another portion of the outer surface of the ferrite core 121''. The flat surface 121d may allow the ferrite core 121'' to be stably arranged inside the housing.

[0209] The flat portion 121d may be disposed on each of the upper end portion 121a'' and the lower end portion 121b'', and these may be connected to each other and disposed continuously. Here, the flat portion 121d disposed on the lower end portion 121b'' may be disposed between two stepped portions 121c'' disposed facing each other on the outer surface of the lower end portion 121b''.

[0210] The ferrite core 121'' shown in FIGS. 29 to 32 includes the step portion 121c'', and therefore can have substantially the same or similar effects as the ferrite core 121 shown in FIGS.

[0211] The ferrite core 121'' shown in FIGS. 29 to 32 may also be alternatively applied to the stylus pens shown in FIGS. 9 to 26. In this case, the buffer member (not shown) may have a shape that can cover a part of the lower end 121b'' of the ferrite core 121''.

[0212] Figure 33 is an oblique view of a stylus pen 1000 according to another embodiment of the present invention, Figure 34 is a cross-sectional view of a portion of the stylus pen 1000 shown in Figure 33, and Figure 35 is an oblique view of the stylus pen 1000 shown in Figure 33 without the housing 1010.

[0213] 33 to 35, a housing 1010 forms the exterior of the stylus pen 1000. The housing 1010 has a predetermined space formed therein and is elongated in one direction. The housing 1010 may be formed by combining two or more parts together, or may be formed as a single, integrated part.

[0214] The housing 1010 may be made of a non-conductive synthetic resin material.

[0215] A button unit 1090 may be disposed on the housing 1010. The button unit 1090 may be for performing a specific operation of the stylus pen 1000. For example, the button unit 1090 may be a button for a cancel operation or a special function operation.

[0216] The core 1020 includes one end disposed outside the housing 1010, and the remaining portion excluding the one end is disposed inside the housing 1010. Here, the one end of the core 1020 may also be called a pen tip.

[0217] The core 1020 may be made of a non-conductive material.

[0218] The core body 1020 may include a base portion 1021 and an outer shell portion 1025. The base portion 1021 has an elongated shape extending along the longitudinal direction of the stylus pen 1000. The outer shell portion 1025 surrounds the side of the base portion 1021. One side end of the base portion 1021 is not covered by the outer shell portion 1025 and is exposed to the outside. The outer shell portion 1025 is made of a material that is relatively harder than the material of the base portion 1021, and reinforces and protects the base portion 1021.

[0219] An external force can move a portion of one end of the core body 1020 into the housing 1010. As the external force increases, the volume of the portion of the one end of the core body 1020 that enters the housing 1010 can increase. When the applied external force decreases, the portion of the one end of the core body 1020 moves out of the housing 1010 again. When the external force is removed, the portion of the one end of the core body 1020 returns to its original state.

[0220] The buffer member 1150 is disposed inside the housing 1010, and is disposed between one end of the ferrite core 1210 and the inner surface of the housing 1010. The buffer member 1150 may be disposed inside the tapered portion 1010t of the housing 1010. Here, the tapered portion 1010t of the housing 1010 is a portion adjacent to one end of the core body 1020 among both ends of the housing 1010, and has a shape in which the width and diameter become thinner toward the end of the one end of the housing 1010.

[0221] The buffer member 1150 has a conical or polygonal pyramid shape, and has a through hole penetrating one end of the ferrite core 1210 and a body portion between one end and the other end of the core body 1020. The inner surface defining the through hole may have a shape corresponding to the outer surface of one end of the ferrite core 1210 and the outer surface of the body portion of the core body 1020. Here, the body portion of the core body 1020 refers to the portion of the core body 1020 that is elongated in one direction and is disposed within the through hole of the ferrite core 1210.

[0222] The buffer member 1150 may be made of an elastic material such as rubber to act as a buffer between the ferrite core 1210 and the housing 1010. The buffer member 1150 can block external electrical or magnetic influences.

[0223] The buffer member 1150 has a shape that covers one end of the ferrite core 1210 .

[0224] An imaginary tangent line that is commonly tangent to the tapered portion 1010t of the housing 1010 and the portion of the core 1020 (or the pen tip) disposed outside the housing 101 may form a predetermined angle as shown in Fig. 4. Here, the predetermined angle is preferably within 30°. If the predetermined angle is within 30°, there is an advantage that the stylus pen according to another embodiment of the present invention can be used for drawing while tilted at 60° with respect to the contact surface.

[0225] The inductor unit 1200 may form an LC resonator together with a capacitor unit (not shown). A resonant frequency may be set depending on the inductance (L) value of the inductor unit 1200 and the capacitance (C) value of the capacitor unit (not shown). The resonant frequency may be varied by changing the inductance (L) value of the inductor unit 1200 and / or the capacitance (C) value of the capacitor unit (not shown).

[0226] The inductor section 1200 includes a ferrite core 1210 and a coil section 1230 wound around the outer surface of the ferrite core 1210 .

[0227] The ferrite core 1210 may have an overall cylindrical, elliptical, or polygonal cylindrical shape, and may have a through-hole 1210h formed therethrough along the longitudinal direction of the ferrite core 1210.

[0228] The ferrite core 1210 has a through-hole 1210h inside, through which the body of the core 1020 passes. The body of the core 1020 can move linearly back and forth along the longitudinal direction via the through-hole 1210h.

[0229] One end of the ferrite core 1210 may have a tapered shape in which the diameter or width decreases toward the end. Here, the outer surface of the tapered end may include at least one inwardly curved portion 121c, as shown in FIG.

[0230] 5, the ferrite core 1210 may include an upper end 121a and a lower end 121b disposed below the upper end 121a. Here, the upper end 121a and the lower end 121b may be integrally formed.

[0231] The coil portion 1230 may be wound in at least one layer around a ferrite core (1230).

[0232] The coil unit 1230 is electrically connected to the substrate 2100. The coil unit 1230 may include a first connecting unit 1231 and a second connecting unit 1232 for connecting to the substrate 2100. The first connecting unit 1231 is disposed on the fixing bracket 1600, and an end thereof is electrically connected to a first terminal unit 2131 of the substrate 2100. The second connecting unit 1232 is disposed on the fixing bracket 1600, and an end thereof is electrically connected to a second terminal unit 2132 of the substrate 2100. Here, the fixing bracket 1600 may have grooves in which the first connecting unit 1231 and the second connecting unit 1232 are disposed. The grooves may be formed on the outer surface of the fixing bracket 1600 along the longitudinal direction of the stylus pen 1000. The grooves can guide the first connecting portion 1231 and the second connecting portion 1232 of the coil portion 1230, and have the advantage of protecting the first connecting portion 1231 and the second connecting portion 1232 from external impact.

[0233] 36 is a perspective view of only the fixing bracket 1600 shown in FIG. 25, FIG. 37 is a perspective view of the fixing bracket 1600 shown in FIG. 36 from another direction, and FIG. 38 is a partial perspective view of FIG. 35 from another direction.

[0234] 35 to 38 , the fixing bracket 1600 is fixedly disposed inside the housing 1010. The fixing bracket 1600 may be disposed between the inductor portion 1200 and the board bracket 1900 inside the housing 1010. One end of the fixing bracket 1600 may be connected to the inductor portion 1200, and the other end of the fixing bracket 1600 may be connected to the board bracket 1900.

[0235] One end of the fixing bracket 1600 may include an insertion groove 1620 into which the other end of the ferrite core 1210 of the inductor unit 1200 is inserted. The insertion groove 1620 may be defined by a first partition wall 1611 and an inner wall 1622 of the fixing bracket 1600.

[0236] The first partition 1611 can be in contact with the other end of the ferrite core 1210, and the first partition 1611 has a through-hole 1610 through which the core body 1020 passes.

[0237] The inner wall 1622 may include a number of protrusions 1621 protruding into the insertion groove 1620. The number of protrusions 1621 may contact the outer surface of the other end of the ferrite core 1210 and serve to position the ferrite core 1210.

[0238] The other end of the fixing bracket 1600 may include locking holes 1660, 1665 into which the locking portions 1960, 1965 of the board bracket 1900 are inserted. There may be at least one locking hole 1660, 1665, and as shown in the drawings, one may be located on the upper side of the fixing bracket 1600 and one may be located on the lower side. The locking portion 1960 of the board bracket 1900 may be coupled to the fixing bracket 1600, so that the fixing bracket 1600 is coupled to the board bracket 1900.

[0239] The other end of the fixing bracket 1600 may include a guide protrusion 1667. The guide protrusion 1667 may be formed to extend along the longitudinal direction of the fixing bracket 1600. The guide protrusion 1667 may be coupled to a guide portion 1967 of the base bracket 1900. By coupling the guide protrusion 1667 to the guide portion 1967 of the base bracket 1900, the fixing bracket 1600 can be positioned along the longitudinal direction of the stylus pen 1000.

[0240] The other end of the fixing bracket 1600 may include a second partition wall 1680. The second partition wall 1680 fixes the position of the elastic member 1800 together with the board bracket 1900. That is, the elastic member 1800 may be fixedly attached between the second partition wall 1680 and the board bracket 1900.

[0241] Fixed bracket 1600 is disposed to cover moving bracket 1300, elastic body 1700, and elastic member 1800. Fixed bracket 1600 may have an internal storage space 1640 in which moving bracket 1300, elastic body 1700, and elastic member 1800 are disposed. In storage space 1640 of fixed bracket 1600, moving bracket 1300 can move back and forth linearly.

[0242] The fixing bracket 1600 may include two or more electrode patterns 1690. The electrode patterns 1690 may be disposed on both outer surfaces of the fixing bracket 1600. The electrode patterns 1690 may be plated on the outer surface of the fixing bracket 1600 made of a non-conductive material. For example, the electrode patterns 1690 may be formed on the outer surface of the non-conductive fixing bracket 1600 using laser direct structuring (LDS) and laser manufacturing antenna (LMA).

[0243] The electrode pattern 1690 may be disposed around the guide hole 1630 of the fixed bracket 1600 and may have a concave-convex or V-shaped configuration. One end of the electrode pattern 1690 may be in contact with or spaced apart from the electrode pattern 1390 of the movable bracket 1300, and the other end of the electrode pattern 1690 may be electrically connected to terminal portions 2191 and 2192 of the substrate 2100.

[0244] Due to the movement of the moving bracket 1300 synchronized with the movement of the core body 1020, the electrode pattern 1690 may contact the electrode pattern 1390 of the moving bracket 1300 or may be spaced a predetermined distance apart from the electrode pattern 1390 of the moving bracket 1300. This will be described later with reference to a separate drawing.

[0245] 39 is a perspective view of FIG. 35 excluding inductor section 1200 and fixing bracket 1600, FIG. 40 is a perspective view of FIG. 39 viewed from another direction, and FIG. 41 is a cross-sectional view of FIG.

[0246] 34 to 39, the moving bracket 1300 moves synchronously with the core body 1020. When one end of the core body 1020 receives an external force from the outside, the core body 1020 moves toward the inside of the housing 1010, and the moving bracket 1300 moves together with the core body 1020.

[0247] The moving bracket 1300 is configured to house the other end of the core body 1020, the magnetic body 1400, and the protective member 1500. The moving bracket 1300 may have a housing portion that houses the other end of the core body 1020, the magnetic body 1400, and the protective member 1500.

[0248] Inside the storage section, magnetic body 1400 and protective member 1500 are arranged to surround the other end of core body 1020. For this reason, magnetic body 1400 may be cylindrical and have a through-hole inside through which the other end of core body 1020 passes, and protective member 1500 may be cylindrical and have a through-hole inside through which the other end of core body 1020 passes.

[0249] The magnetic body 1400 includes a magnetic substance and moves together with the core body 1020 in synchronization with the movement of the core body 1020. The movement of the magnetic body 1400 changes the distance between the magnetic body 1400 and the inductor unit 1200 fixedly disposed inside the housing 1010. The change in distance changes the inductance of the inductor unit 1200.

[0250] The protective member 1500 includes an elastic material and may be disposed sandwiched between the other end of the core body 1020 and the moving bracket 1300. The other end of the core body 1020 may be protected by the protective member 1500, and since the protective member 1500 is sandwiched between the other end of the core body 1020 and the moving bracket 1300, the movement of the core body 1020 may be synchronized with the moving bracket 1300.

[0251] 38 , the protective member 1500 may include a protrusion 1510 that protrudes outward from the outer surface. The protrusion 1510 may be sandwiched in an insertion groove 1310 formed in the moving bracket 1300. The protective member 1500 may be stably fixed to the moving bracket 1300 by the protrusion 1510 of the protective member 1500 and the insertion groove 1310 of the moving bracket 1300, and thus the other end of the core body 1020 may be fixed to the moving bracket 1300.

[0252] The moving bracket 1300 may include a first protrusion 1330a and a second protrusion 1330b. The first protrusion 1330a and the second protrusion 1330b may protrude outward from the outer surface of the moving bracket 1300 or in a direction perpendicular to the longitudinal direction of the stylus pen 1000. The first protrusion 1330a and the second protrusion 1330b may be disposed in a guide hole 1630 of the fixed bracket 1600 shown in FIG. 35. When the moving bracket 1300 moves in synchronization with the movement of the core body 1020, the first protrusion 1330a and the second protrusion 1330b can move along the guide hole 1630 of the fixed bracket 1600.

[0253] The moving bracket 1300 may include a third protrusion 1350. The third protrusion 1350 may protrude outward from the outer surface of the moving bracket 1300 or in a direction perpendicular to the longitudinal direction of the stylus pen 1000. The third protrusion 1350 may be disposed in a guide hole 1650 of the fixed bracket 1600 shown in FIG. 35 . When the moving bracket 1300 moves in synchronization with the movement of the core body 1020, the third protrusion 1350 can move along the guide hole 1650 of the fixed bracket 1600.

[0254] The moving bracket 1300 may include an extension 1370. The extension 1370 may extend along the longitudinal direction of the stylus pen 1000 on the outer surface of the moving bracket 1300. Alternatively, the extension 1370 may extend along the longitudinal direction of the core body 1020 on the outer surface of the moving bracket 1300. The extension 1370 may have a structure and shape that allows it to be disposed inside the elastic body 1700. An extension 1870 of the elastic member 1800 may be disposed on the end of the extension 1370.

[0255] The moving bracket 1300 may include an electrode pattern 1390. The electrode pattern 1390 may be disposed on the outer surface of the moving bracket 1300 on which the extension portion 1370 is formed and on the first and second protrusions 1330a and 1330b.

[0256] The electrode pattern 1390 may be in contact with and electrically connected to the elastic body 1700 surrounding the extension 1370 of the moving bracket 1300. The electrode pattern 1390 may be in contact with and electrically connected to the electrode pattern 1690 of the fixed bracket 1600 shown in FIG. 35, and may be electrically isolated from the electrode pattern 1690 of the fixed bracket 1600 by movement of the core body 1020.

[0257] The electrode pattern 1390 may be plated on the outer surface of the non-conductive moving bracket 1300. For example, the electrode pattern 1390 may be formed on the outer surface of the non-conductive moving bracket 1300 using laser direct structuring (LDS) and laser manufacturing antenna (LMA).

[0258] The electrode pattern 1390 may include a base electrode pattern 1391 and first and second extension patterns 1393a and 1393b.

[0259] The base electrode pattern 1391 may be disposed on the outer surface of the moving bracket 1300 and may be disposed so as to surround the extension portion 1370 of the moving bracket 1300. The base electrode pattern 1391 contacts one end of the elastic body 1700.

[0260] The first and second extension patterns 1393a and 1393b may extend from both sides of the first electrode pattern 1391, with the first extension pattern 1393a being disposed on the first protrusion 1330a and the second extension pattern 1393b being disposed on the second protrusion 1330b. The first and second extension patterns 1393a and 1393b may contact the electrode pattern 1690 of the fixing bracket 1600 shown in FIG. 35 or may be released from contact with the electrode pattern 1690 due to movement of the core body 1020.

[0261] The elastic body 1700 may be made of a conductive material and have a spring shape. The elastic body 1700 may be disposed between the moving bracket 1300 and the elastic member 1800. Here, the elastic body 1700 may be sandwiched between the moving bracket 1300 and the elastic member 1800 in a partially compressed state, rather than a fully compressed state. If an external force applied to the moving bracket 1300 synchronized with the movement of the core body 1020 is smaller than the elastic force pushing outward from the partially compressed elastic body 1700, the elastic body 1700 will not be compressed, but if the external force is greater than the elastic force, the elastic body 1700 will begin to be compressed.

[0262] The extension 1370 of the moving bracket 1300 and the extension 1870 of the elastic member 1800 may be disposed together inside the elastic body 1700. This allows the internal space of the elastic body 1700 to be utilized, which has the advantage of reducing the internal volume of the stylus pen 1000.

[0263] One end of the elastic body 1700 is electrically connected to the electrode pattern 1390 of the moving bracket 1300, and the other end is electrically connected to the terminal portion 2110 of the substrate 2100. The elastic body 1700 may include a connecting wire 1710 connecting the elastic body 1700 and the terminal portion 2110 of the substrate 2100. One end of the connecting wire 1710 may be connected to the elastic body 1700, and the other end may be connected to the terminal portion 2110 of the substrate 2100. In order to protect and guide the connecting wire 1710, the elastic member 1800 and the substrate bracket 1900 may have a guide groove in which the connecting wire 1710 is disposed.

[0264] The elastic member 1800 is made of a non-conductive material and has a predetermined elasticity. For example, the elastic member 1800 may be rubber.

[0265] The elastic member 1800 may be disposed between the moving bracket 1300 and the base bracket 1900 .

[0266] 42 is a perspective view of only the elastic member 1800 shown in FIG. 39, and FIG. 43 is a perspective view of the board bracket 1900 and the board 2100 shown in FIG.

[0267] 36 to 43 , the elastic member 1800 may include an extension 1870. The extension 1870 may extend in a lateral direction of the moving bracket 1300 on the outer surface of the elastic member 1800. The extension 1870 may be disposed inside the elastic body 1700.

[0268] The elastic member 1800 may include a guide groove 1810. The guide groove 1810 may be formed on the outer surface of the elastic member 1800 along the longitudinal direction of the stylus pen 1000. The connecting line 1710 of the elastic body 1700 may be disposed in the guide groove 1810.

[0269] The elastic member 1800 may include a mounting groove 1850. The mounting groove 1850 may be formed on an outer surface of the elastic member 1800. The mounting groove 1850 may be disposed on a side opposite the extension portion 1870. The mounting portion 1910 of the board bracket 1900 may be inserted into the mounting groove 1850. A locking groove 1851 having a shape corresponding to the protrusion 1915 of the mounting portion 1910 of the board bracket 1900 may be formed inside the mounting groove 1850. The elastic member 1800 may be stably and securely mounted to the board bracket 1900 via this.

[0270] The board bracket 1900 supports the board 2100 inside the housing 1010 and is coupled to the elastic member 1800 to support the elastic member 1800 .

[0271] The substrate bracket 1900 may include sides 1940 that guide and support the sides of the substrate 2100 .

[0272] The board bracket 1900 may include mounting portions 1910 for coupling with the elastic member 1800. The mounting portions 1910 protrude from the board bracket 1900 toward the moving bracket 1300. The mounting portions 1910 may include protrusions 1915 protruding from the outer surface. The protrusions 1915 may protrude in a direction perpendicular to the direction in which the mounting portions 1910 protrude.

[0273] The board bracket 1900 may include a guide groove 1920. The guide groove 1920 can guide and protect the connecting wire 1710 of the elastic body 1700.

[0274] The substrate 2100 is placed on the substrate bracket 1900 .

[0275] The substrate 2100 may include a number of terminal portions 2110, 2131, 2132, 2191, and 2192. Of the number of terminal portions 2110, 2131, and 2132, the terminal portion 2110 is electrically connected to the elastic body 1700, and the first and second terminal portions 2131 and 2132 are electrically connected to the coil portion 1230 of the inductor portion 1200. The third and fourth terminal portions 2191 and 2192 are electrically connected to electrode patterns 1690 disposed on both sides of the outer surface of the fixing bracket 1600.

[0276] The substrate 2100 includes a capacitor unit (not shown). One or more capacitors constituting the capacitor unit (not shown) may be disposed on the substrate 2100.

[0277] The substrate 2100 may include a circuit pattern that electrically connects one or more capacitors in a capacitor unit (not shown) to a number of terminal units 2110, 2131, and 2132.

[0278] FIG. 44 is a diagram illustrating the movement of the moving bracket 1300 due to the movement of the core body 1020 shown in FIGS. 35 to 43, and the electrical contact and disconnection between the fixed bracket 1600 and the moving bracket 1300.

[0279] Figure 44(A) shows the state when no external force is acting on the core body 1020, and Figure 44(B) shows the state when a predetermined external force is acting on the core body 1020 and the moving bracket 1300 moves in one direction.

[0280] 44A, if no external force is applied to the core body 1020, the electrode pattern 1390 of the movable bracket 1300 contacts the electrode pattern 1690 of the fixed bracket 1600. That is, the electrode pattern 1390 of the movable bracket 1300 and the electrode pattern 1690 of the fixed bracket 1600 are electrically connected to each other.

[0281] The elastic body 1700 presses the second protrusion 1330b of the movable bracket 1300 toward the core body 1020, so that the electrode pattern 1390 arranged on the outer surface of the second protrusion 1330b can be maintained in contact with the electrode pattern 1690 of the fixed bracket 1600.

[0282] 44(B), when a predetermined external force acts on the core body 1020 and causes the core body 1020 to move in one direction, the movable bracket 1300 moves in that direction in conjunction with the core body 1020. As the movable bracket 1300 moves in that direction, the second protrusion 1330b also moves in that direction. As the second protrusion 1330b moves, the electrode pattern 1390 of the movable bracket 1300 is released from contact with the electrode pattern 1690 of the fixed bracket 1600. Similarly, the first protrusion 1330a located on the opposite side of the second protrusion 1330b also moves, causing the electrode pattern 1390 of the movable bracket 1300 to be released from contact with the electrode pattern 1690 of the fixed bracket 1600. Then, the movement of the movable bracket 1300 compresses the elastic body 1700.

[0283] 44(B), when a predetermined external force acts on the core body 1020 and the core body 1020 moves in one direction, the contact between the electrode pattern 1390 of the movable bracket 1300 and the electrode pattern 1690 of the fixed bracket 1600 is released. This release of contact changes the capacitance of a capacitor unit (not shown) mounted on the substrate 2100. This change in capacitance changes the frequency of the pen signal emitted from the stylus pen 1000. A receiving side that receives the pen signal can detect the changed frequency and determine that the stylus pen 1000 has contacted the screen.

[0284] Figure 45 is a schematic diagram of (A) and (B) of Figure 44, and Figure 46 is a simplified equivalent circuit diagram of a stylus pen according to another embodiment of the present invention, which corresponds to (A) and (B) of Figure 44.

[0285] 45 and 46A and 46B, a plurality of capacitors C1, C2, C3, and Cs are disposed on a substrate 2100. The plurality of capacitors C1, C2, C3, and Cs may constitute a capacitor unit (not shown). At least one of the plurality of capacitors C1, C2, C3, and Cs is connected in parallel to each other to maintain a constant capacitance value, and an auxiliary capacitor Cs is connected in parallel to the basic capacitor or is not connected to the basic capacitor depending on whether or not the electrode pattern 1690 of the fixed bracket 1600 and the electrode pattern 1390 of the moving bracket 1300 contact or contacts each other.

[0286] 45A and 46A, when no external force is applied to the core 1020, the electrode pattern 1690 of the fixed bracket 1600 and the electrode pattern 1390 of the movable bracket 1300 are in contact with each other, so that the auxiliary capacitor Cs is connected in parallel with the basic capacitors C1, C2, and C3. Therefore, the capacitance of the capacitor unit (not shown) is the sum of the capacitance values ​​of the basic capacitors C1, C2, and C3 and the capacitance of the auxiliary capacitor Cs.

[0287] 45B and 46B, if a predetermined external force is applied to the core body 1020, the movement of the movable bracket 1300 synchronized with the movement of the core body 1020 causes the electrode pattern 1390 of the movable bracket 1300 to be released from contact with the electrode pattern 1690 of the fixed bracket 1600. Therefore, the auxiliary capacitor Cs cannot be electrically connected to the basic capacitors C1, C2, and C3, and the capacitance of the capacitor unit (not shown) is changed to the capacitance value of the basic capacitors C1, C2, and C3.

[0288] 46(B), it can be seen that the electrode pattern 1390 of the movable bracket 1300 and the electrode pattern 1690 of the fixed bracket 1600 are in contact at two locations. This can be understood from the fact that the fixed bracket 1600 has two electrode patterns 1690 and the first and second extension patterns 1393a and 1393b are disposed on the first and second protrusions 1330a and 1330b of the movable bracket 1300, as shown in FIGS.

[0289] If the external force applied to the core body 1020 is not strong enough to separate both the first and second extension patterns 1393a, 1393b from the two electrode patterns 1690 of the fixing bracket 1600, i.e., if the first extension pattern 1393a separates from one electrode pattern 1690 of the fixing bracket 1600 but the second extension pattern 1393b does not separate from the other remaining electrode pattern 1690 of the fixing bracket 1600, the auxiliary capacitor Cs remains connected in parallel with the basic capacitors C1, C2, and C3.

[0290] On the other hand, the auxiliary capacitor Cs is electrically disconnected from the basic capacitors C1, C2, and C3 only when the external force applied to the core 1020 is strong enough to completely separate both the first and second extension patterns 1393a and 1393b from the two electrode patterns 1690 of the fixing bracket 1600. Therefore, when using the stylus pen 1000 according to another embodiment of the present invention, a reference pressure for distinguishing between hover and contact can be clearly set, which is advantageous in that the distinction between hover and contact can be clearly established. In particular, even if one of the first and second extension patterns 1393a and 1393b does not contact one of the two electrode patterns 1690 of the fixing bracket 1600 due to a problem in the manufacturing process or carelessness on the part of the user during the manufacture of the stylus pen, the stylus pen 1000 according to another embodiment of the present invention can still maintain contact with one electrode pattern that is different from the other extension pattern, thereby advantageously allowing a clear distinction between the hover state and the contact state.

[0291] Figure 47 is an oblique view of a stylus pen 1000 according to another embodiment of the present invention shown in Figure 33, viewed from the side of the core body 1020, (A) of Figure 48 is a portion of a cross-sectional view of the stylus pen 1000 shown in Figure 47 taken along line A-A', (B) of Figure 48 is a portion of a cross-sectional view of the stylus pen 1000 shown in Figure 47 taken along line B-B', and Figure 49 is a drawing showing side views A and B and a cross-sectional view of the ferrite core 1210 shown in Figures 47 and 48.

[0292] Referring to Figures 35, 47 to 49, the housing 1010 of the stylus pen 1000 has a rectangular cylindrical shape with rounded corners, and the portion where a portion of the core body 1020 is exposed from the housing 1010 has a shape in which its width becomes narrower as it goes outward.

[0293] The components disposed inside the housing 1010 also correspond to the shape of the housing 1010. Among the internal components, the ferrite core 1210 of the inductor unit 1200 also has an optimized structure corresponding to the shape of the housing 1010.

[0294] As shown in Figures 48A and 48B, the ferrite core 1210 has a first cross-sectional shape cut in a first vertical direction (direction A-A' in Figure 47) perpendicular to the axial direction x of the ferrite core 1210 (or the longitudinal direction of the stylus pen 1000) that is different from a second cross-sectional shape cut in a second vertical direction (direction B-B' in Figure 47). Specifically, the thickness w1 of the ferrite core 1210 in the first vertical direction is different from the thickness w2 in the second direction. More specifically, the thickness w1 in the first vertical direction is smaller than the thickness w2 in the second direction. Here, the thickness w1 in the first vertical direction may be defined as the shortest distance from the through hole 1210h of the ferrite core 1210 to the outer surface of the ferrite core 1210 in the first cross-sectional shape, and the thickness w2 in the second vertical direction may be defined as the shortest distance from the through hole 1210h of the ferrite core 1210 to the outer surface of the ferrite core 1210 in the second cross-sectional shape. Alternatively, different from what is shown in the drawings, the thickness w1 in the first vertical direction may be the entire thickness of the ferrite core 1210 in the first cross-sectional shape, and the thickness w2 in the second vertical direction may be the entire thickness of the ferrite core 1210 in the second cross-sectional shape.

[0295] The ferrite core 1210 has a tubular or cylindrical shape. A flat surface 1210d may be arranged on at least a portion of the outer surface of the ferrite core 1210. A flat surface corresponding to the flat surface 1210d may also be arranged on another portion of the outer surface of the ferrite core 1210. The flat surface 1210d allows the ferrite core 1210 to be stably arranged inside the housing 1010. The flat surface 1210d is formed to extend from one end to the other end of the ferrite core 1210 along the axial direction x of the ferrite core 1210.

[0296] One end of the ferrite core 1210 may include at least two or more curved portions 1210c. At least a portion of the curved portion 1210c appears in the second cross-sectional shape and does not appear in the first cross-sectional shape. The curved portion 1210c may be a curved surface that curves toward the through hole 1210h from one side surface of the one end of the ferrite core 1210 to a portion of the ferrite core 1210 adjacent to the through hole 1210h. Such curved portions 1210c may be arranged on both sides of the through hole 1210h that face each other at one end of the ferrite core 1210.

[0297] As shown in (1), (2), and (3) of Fig. 49, the curved surface portion 1210c changes from an aspherical shape to a spherical shape as it moves in the axial direction x of the ferrite core 1210. (3) of Fig. 49 shows that the curved surface portion 1210c has an aspherical shape, (1) of Fig. 49 shows that the curved surface portion 1210c has a spherical shape, and (2) of Fig. 49 shows that the curved surface portion 1210c has a shape intermediate between the aspherical and spherical shapes.

[0298] At one end of the ferrite core 1210, the flat portion 1210d has a shape in which its width gradually narrows toward the axial direction x of the ferrite core 1210. Here, the width of the flat portion 1210d may decrease nonlinearly.

[0299] 6 to 8, the use of the ferrite core 1210 allows the inductor unit 1200 including the ferrite core 1210 to be positioned closer to the tip of the core 1020 inside the stylus pen 1000. Therefore, the inductor unit 1200 can be positioned closer to the receiver (not shown), which has the advantage of increasing the magnitude of the pen signal received by the receiver.

[0300] 47 to 49 may be applied to the stylus pen shown in Fig. 3 or 22. Furthermore, the ferrite core of the stylus pen shown in Fig. 3 or 22 may be applied to the stylus pen of Fig. 33.

[0301] 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.

[0302] 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.

[0303] Overall structure of a waterproof stylus pen A stylus pen 100 according to an embodiment of the present invention may include a housing 101, a core 102, an inductor portion 120, a capacitor portion (not shown), a first fixing member 130, and sealing members 200a, 200a', and 200b. Details of the housing 101, the core 102, the inductor portion 120, the capacitor portion, and the first fixing member 130 are the same as those described above.

[0304] A stylus pen 1000 according to another embodiment of the present invention may include a housing 1010, a core 1020, an inductor portion 1200, a capacitor portion (not shown), a fixing bracket 1600, and sealing members 2000a, 2000a', and 2000b. The details of the housing 1010, the core 1020, the inductor portion 1200, the capacitor portion, and the fixing bracket 1600 are the same as those described above.

[0305] Meanwhile, the sealing members 200a, 200a', 200b of the stylus pen 100 according to one embodiment of the present invention and the sealing members 2000a, 2000a', 2000b of the stylus pen 1000 according to other embodiments of the present invention may be made of synthetic rubber or thermoplastic elastomer (TPE). For example, the synthetic rubber may be nitrile butadiene rubber (NBR), fluoroelastomer (FKM), ethylene propylene diene monomer (EPDM), or silicone rubber, but is not limited thereto.

[0306] Hereinafter, sealing members 200a, 200a', and 200b of a stylus pen 100 according to an embodiment of the present invention and sealing members 2000a, 2000a', and 2000b of a stylus pen 1000 according to other embodiments of the present invention will be described with reference to the accompanying drawings.

[0307] Water inflow route FIG. 50a is a view showing a first moisture inflow path and a second moisture inflow path through which moisture flows in through a core opening of a housing in the stylus pen shown in FIG.

[0308] FIG. 50b is a view showing a first moisture inflow path and a second moisture inflow path through which moisture flows in through the core opening of the housing in the stylus pen shown in FIG.

[0309] As shown in Fig. 50a, moisture may enter the inside of the stylus pen 100 shown in Fig. 9 through a core opening (not shown) of the housing 101. Here, the core opening may refer to the space between the housing 101 and the core 102.

[0310] 50a(a), moisture may flow into the inside of the stylus pen 100 via a first moisture inflow path P1, which is a path through which moisture passes through the core opening of the housing 101 and flows into the inside of the stylus pen 100 via the space between the housing 101 and the inductor unit 120. Alternatively, as shown in FIG. 50a(b), moisture may flow into the inside of the stylus pen 100 via a second moisture inflow path P2, which is a path through which moisture passes through the core opening of the housing 101 and flows into the inside of the stylus pen 100 via the through-hole of the ferrite core 121.

[0311] As shown in Fig. 50b, moisture may flow into the inside of the stylus pen 1000 shown in Fig. 34 through the core opening of the housing 1010. Specifically, as shown in (a) of Fig. 50b, moisture may flow into the inside of the stylus pen 1000 through a first moisture inflow path P1', which is a path through which moisture passes through the core opening of the housing 1010 and flows into the inside of the stylus pen 1000 via the space between the housing 1010 and the inductor unit 1200. Alternatively, as shown in (b) of Fig. 50b, moisture may flow into the inside of the stylus pen 1000 through a second moisture inflow path P2', which is a path through which moisture passes through the core opening of the housing 1010 and flows into the inside of the stylus pen 1000 via the through-hole of the ferrite core 1210.

[0312] A stylus pen including a sealing member capable of blocking multiple moisture inflow paths 9 may include a plurality of sealing members 200a, 200a', and 200b capable of blocking a plurality of moisture inflow paths P1 and P2 passing through the core opening of the housing 101. Specifically, the plurality of moisture inflow paths P1 and P2 may include a first moisture inflow path P1 and a second moisture inflow path P2. Specifically, the plurality of sealing members 200a, 200a', and 200b may include a first sealing member 200a, 200a' capable of blocking the first moisture inflow path P1 and a second sealing member 200b capable of blocking the second moisture inflow path P2.

[0313] 34 may include a plurality of sealing members 2000a, 2000a', and 2000b capable of blocking a plurality of moisture inflow paths P1' and P2' passing through the core opening of the housing 1010. Specifically, the plurality of moisture inflow paths P1' and P2' may include a first moisture inflow path P1' and a second moisture inflow path P2'. Specifically, the plurality of sealing members 2000a, 2000a', and 2000b may include a first sealing member 2000a, 2000a' capable of blocking the first moisture inflow path P1' and a second sealing member 2000b capable of blocking the second moisture inflow path P2'.

[0314] Arrangement of the first sealing member Figure 51a is a view showing one embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in Figure 50a. Figure 51b is a view showing one embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in Figure 50b. Figure 52a is a view showing another embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in Figure 50a. Figure 52b is a view showing another embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in Figure 50b.

[0315] Arrangement surrounding the outer surface of the ferrite core Figure 51a (a) is a view showing an embodiment of a first sealing member 200a arranged to cover the outer surface of the ferrite core 121 of the stylus pen 100 shown in Figure 50a. Figure 51a (b) is a cross-sectional view of the stylus pen 100 shown in Figure 51a (a) taken along line A-A'.

[0316] 51a, the first sealing member 200a may be disposed to cover at least a portion of the outer surface of the ferrite core 121. The first sealing member 200a may also be disposed to be in close contact with the inner wall of the housing 101. In this way, the first sealing member 200a can prevent moisture from entering the first moisture inflow path P1.

[0317] Meanwhile, as described above, the stylus pen 100 shown in Fig. 50a may further include an inner case 110 disposed inside the housing 101. When the stylus pen 100 further includes the inner case 110, the first sealing member 200a may be disposed to be in close contact with the inner wall of the inner case 110.

[0318] Figure 51b (a) is a diagram showing an embodiment of a first sealing member 2000a arranged to cover the outer surface of the ferrite core 1210 of the stylus pen 1000 shown in Figure 50b. Figure 51b (b) is a cross-sectional view of the stylus pen 1000 shown in Figure 51b (a) taken along line B-B'.

[0319] 51b, the first sealing member 2000a may be disposed to cover at least a portion of the outer surface of the ferrite core 1210. The first sealing member 2000a may also be disposed to be in close contact with the inner wall of the housing 1010. In this way, the first sealing member 2000a can prevent moisture from entering the first moisture inflow path P1'.

[0320] Arrangement surrounding the outer surface of the fixing bracket (or first fixing member) Figure 52a (a) is a view showing an embodiment of a first sealing member 200a' arranged to cover the outer surface of the first fixing member 130 of the stylus pen 100 shown in Figure 50a. Figure 52a (b) is a cross-sectional view taken along CC' of the stylus pen 100 according to an embodiment of the present invention shown in Figure 52a (a).

[0321] 52a, the first sealing member 200a' may be disposed to cover at least a portion of the outer surface of the first fixing member 130. The first sealing member 200a' may also be disposed to be in close contact with the inner wall of the housing 101. In this way, the first sealing member 200a' may prevent moisture from entering the first moisture inflow path P1.

[0322] Meanwhile, as described above, the stylus pen 100 shown in Fig. 50a may further include an inner case 110 disposed inside the housing 101. When the stylus pen 100 further includes the inner case 110, the first sealing member 200a' may be disposed to be in close contact with the inner wall of the inner case 110.

[0323] Figure 52b (a) is a view showing an embodiment of a first sealing member 2000a' arranged to cover the outer surface of the fixing bracket 1600 of the stylus pen 1000 shown in Figure 50b. Figure 52b (b) is a cross-sectional view of the stylus pen 1000 shown in Figure 52b (a) taken along line D-D'.

[0324] 52b, the first sealing member 2000a' may be disposed to cover at least a portion of the outer surface of the fixing bracket 1600. The first sealing member 2000a' may also be disposed to be in close contact with the inner wall of the housing 1010. In this way, the first sealing member 2000a' may prevent moisture from entering the first moisture inflow path P1'.

[0325] Placement of the second sealing member Figure 53a is a view showing a sealing member blocking the second moisture inflow path in the stylus pen shown in Figure 50a, and Figure 53b is a view showing a sealing member blocking the second moisture inflow path in the stylus pen shown in Figure 50b.

[0326] Figure 53a (a) is a view showing an embodiment of the second sealing member 200b disposed on the partition 132 of the first fixing member 130 of the stylus pen 100 shown in Figure 50a. Figure 53a (b) is a perspective view showing the coupling relationship between the first fixing member 130 and the second sealing member 200b.

[0327] 53a, the second sealing member 200b may be disposed on the partition 132 so as to fill the outer periphery of the through-hole 132h of the partition 132 where the core 102 penetrates the partition 132 of the first fixing member 130. The second sealing member 200b may also be disposed to be in close contact with the core 102 where the core 102 penetrates the through-hole 132h of the partition 132. In this way, the second sealing member 200b can prevent moisture from entering the second moisture inflow path P2. Meanwhile, the details of the first fixing member 130, the partition 132, and the through-hole 132h are the same as those described above.

[0328] Figure 53b (a) is a view showing one embodiment of the second sealing member 2000b disposed on the partition 1611 of the fixing bracket 1600 of the stylus pen 1000 shown in Figure 50b. Figure 53b (b) is a perspective view showing the coupling relationship between the fixing bracket 1600 and the second sealing member 2000b.

[0329] 53b, the second sealing member 2000b may be disposed on the partition 1611 so as to fill the outer periphery of the through-hole 1610 of the partition 1611 where the core 1020 penetrates the partition 1611 of the fixing bracket 1600. The second sealing member 2000b may also be disposed so as to be in close contact with the core 1020 where the core 1020 penetrates the through-hole 1610 of the partition 1611. This allows the second sealing member 2000b to prevent moisture from entering the second moisture inflow path P2'. Meanwhile, the details of the fixing bracket 1600, the partition 1611, and the through-hole 1610 are the same as those described above.

[0330] Stylus pen including first and second sealing members FIG. 54 is a diagram showing the stylus pens shown in FIGS. 50a and 50b to which a first sealing member and a second sealing member are further added.

[0331] As shown in FIG. 54(a), the stylus pen 100 shown in FIG. 50a may include a plurality of sealing members 200a, 200a', and 200b capable of blocking a plurality of moisture inflow paths P1 and P2 passing through a core opening (not shown) of the housing 101. Specifically, the plurality of moisture inflow paths P1 and P2 may include a first moisture inflow path P1 and a second moisture inflow path P2. Specifically, the plurality of sealing members 200a, 200a', and 200b may include a first sealing member 200a, 200a' capable of blocking the first moisture inflow path P1 and a second sealing member 200b capable of blocking the second moisture inflow path P2. In other words, the stylus pen 100 can block both the first moisture inflow path P1 and the second moisture inflow path P2 by the first sealing members 200a, 200a' and the second sealing member 200b.

[0332] As shown in Figure 54(b), the stylus pen 1000 shown in Figure 50b may include a plurality of sealing members 2000a, 2000a', and 2000b capable of blocking a plurality of moisture inflow paths P1' and P2' passing through the core opening of the housing 1010. Specifically, the plurality of moisture inflow paths P1' and P2' may include a first moisture inflow path P1' and a second moisture inflow path P2'. Specifically, the plurality of sealing members 2000a, 2000a', and 2000b may include a first sealing member 2000a, 2000a' capable of blocking the first moisture inflow path P1' and a second sealing member 2000b capable of blocking the second moisture inflow path P2. That is, the stylus pen 1000 can block both the first moisture inflow path P1' and the second moisture inflow path P2' by using the first sealing members 2000a, 2000a' and the second sealing member 2000b.

[0333] Stylus pen including sealing member including adhesive portion FIG. 55 is a drawing showing a modification of the sealing member shown in FIGS. 53a and 53b.

[0334] As described above, the second sealing member 200b shown in Fig. 53a may be disposed on the partition 132 so as to fill the outer periphery of the through-hole 132h of the partition 132 where the core 102 penetrates the partition 132 of the first fixing member 130. In addition, the second sealing member 200b may be disposed so as to be in close contact with the core 102 where the core 102 penetrates the through-hole 132h of the partition 132. In this way, the second sealing member 200b can prevent moisture from entering the second moisture inflow path P2. Meanwhile, the details of the first fixing member 130, the partition 132, and the through-hole 132h are the same as those described above.

[0335] 53b may be disposed on the partition wall 1611 so that the core body 1020 fills the outer periphery of the through-hole 1610 of the partition wall 1611 where the core body 1020 penetrates the partition wall 1611 of the fixing bracket 1600. The second sealing member 2000b may be disposed in close contact with the core body 1020 where the core body 1020 penetrates the through-hole 1610 of the partition wall 1611. In this way, the second sealing member 2000b can prevent moisture from entering the second moisture inflow path P2'. Meanwhile, the details of the fixing bracket 1600, the partition wall 1611, and the through-hole 1610 are the same as those described above.

[0336] Meanwhile, as shown in (a) of FIG. 55, the second sealing member 200b of the stylus pen 100 shown in FIG. 50a may include a sealing member main body 203 and a contact portion 201. Specifically, the sealing member main body 203 may be disposed in the partition 132 so as to fill the outer contour of the through-hole 132h of the partition 132. Specifically, the contact portion 201 may have a cylindrical shape having a height equal to the longitudinal height of the core body 102, and the second sealing member 200b may be disposed so as to come into contact with the core body 102 at the contact portion 201. As a result, the contact portion 201 can maintain at least a portion of contact with the core body 102 when the core body 102 moves in the longitudinal direction of the core body 102. That is, when the core body 102 moves in the longitudinal direction of the core body 102, the second sealing member 200b can prevent moisture that has flowed in through the second moisture inflow path P2 from passing through the through hole 132h located in the partition 132 of the first fixing member 130 via the contact portion 201.

[0337] 55(b), the second sealing member 2000b of the stylus pen 1000 shown in FIG. 50b may include a sealing member main body 2003 and a contact portion 2001. Specifically, the sealing member main body 2003 may be disposed in the partition 1611 so as to fill the outer contour of the through-hole 1610 of the partition 1611. Specifically, the contact portion 2001 may have a cylindrical shape having a height equal to the longitudinal height of the core body 1020, and the second sealing member 2000b may be disposed so as to come into contact with the core body 1020 at the contact portion 2001. As a result, the contact portion 2001 can maintain at least a portion of contact with the core body 1020 when the core body 1020 moves in the longitudinal direction of the core body 1020. That is, when the core body 1020 moves in the longitudinal direction of the core body 1020, the second sealing member 2000b can prevent moisture that has flowed in through the second moisture inflow path P2' from passing through the through hole 1610 located in the partition wall 1611 of the fixing bracket 1600 via the contact portion 2001.

[0338] Stylus pen including cushioning material 9, 51a, and 52a, the stylus pen 100 shown in Fig. 50a may include a housing 101, a core 102, an inductor portion 120, a capacitor portion (not shown), a first fixing member 130, a buffer member 115, and first sealing members 200a, 200a'. The details of the housing 101, the core 102, the inductor portion 120, the capacitor portion (not shown), the first fixing member 130, and the first sealing members 200a, 200a' are the same as those described above.

[0339] 50a may further include a buffer member 115 that may be disposed between the inner surface of the housing 101 and the other end of the ferrite core 121. Here, the buffer member 115 may be disposed so as to cover at least a portion of the other end of the ferrite core 121. The buffer member 115 may also be disposed so as to be in close contact with the housing 101 and the other end of the ferrite core 121. As a result, the buffer member 115 may block a path through which moisture may enter the inside of the stylus pen 1000 through a core opening (not shown) of the housing 101.

[0340] 4 to 7, the other end of the ferrite core 121 may have a tapered shape in which the diameter or width decreases toward the end. The other end of the ferrite core 121 may also include at least one curved surface 121c whose outer surface is curved inward. Due to the curved surface 121c included in the other end of the ferrite core 121, the buffer member 115 may have a smaller thickness than when the other end of the ferrite core 121 does not include the curved surface 121c.

[0341] 34, 51b, and 52b, the stylus pen 1000 may include a housing 1010, a core 1020, an inductor portion 1200, a capacitor portion (not shown), a fixing bracket 1600, a buffer member 1150, and first sealing members 2000a, 2000a'. The details of the housing 1010, the core 1020, the inductor portion 1200, the capacitor portion, the fixing bracket 1600, and the first sealing members 2000a, 2000a' are the same as those described above.

[0342] 50b may include a buffer member 1150 that may be disposed between the inner surface of the housing 1010 and the other end of the ferrite core 1210. Here, the buffer member 1150 may be disposed so as to cover at least a portion of the other end of the ferrite core 1210. The buffer member 1150 may also be disposed so as to be in close contact with the housing 1010 and the other end of the ferrite core 1210. As a result, the buffer member 1150 may block a path through which moisture may enter the inside of the stylus pen 1000 through a core opening (not shown) of the housing 1010.

[0343] 4 to 7, the other end of the ferrite core 1210 may have a tapered shape in which the diameter or width decreases toward the end. The other end of the ferrite core 1210 may also include at least one curved surface 121c whose outer surface is curved inward. The curved surface 121c included in the other end of the ferrite core 1210 may allow the buffer member 115 to have a smaller thickness than when the other end of the ferrite core 121 does not include the curved surface 121c.

[0344] Third sealing member Figure 56 is a view showing yet another embodiment of a sealing member for blocking the first moisture inflow path in the stylus pen shown in Figure 50b. Specifically, Figure 56(a) is a partial perspective view of a stylus pen including a third sealing member. Figure 56(b) is a partial cross-sectional view taken along line CC' in Figure 56(a).

[0345] As shown in FIG. 56, the stylus pen 1000 may include a third sealing member 2000c that can block the first moisture inflow path P1' shown in FIG. 50b that passes through a core opening (not shown) of the housing 1010.

[0346] 56(a), the third sealing member 2000c may be disposed to cover at least a portion of the outer surface of the ferrite core 1210. Specifically, the third sealing member 2000c may cover at least a portion of the outer surface of the ferrite core 1210 near the core opening. Furthermore, the third sealing member 2000c may be disposed to face the coil portion 1230, but is not limited thereto.

[0347] As shown in Fig. 56(b), the third sealing member 2000c may be disposed to be in close contact with the inner wall of the housing 1010. In this way, the third sealing member 2000c can prevent moisture from entering the first moisture inflow path P1' shown in Fig. 50b.

[0348] Cushioning member and fourth sealing member Figure 57 is a diagram showing one embodiment of a buffer member that blocks the first and second moisture inflow paths in the stylus pen shown in Figure 50b. Specifically, Figure 57(a) is a partial perspective view of a stylus pen including a buffer member. Figure 57(b) is a partial cross-sectional view taken along line D-D' in Figure 57(a).

[0349] 57, the stylus pen 1000 may include a buffer member 1150. Specifically, the buffer member 1150 may be arranged to cover at least a portion of the outer surface of each of the core body 1020 and the ferrite core 1210 near a core body opening (not shown). More specifically, the buffer member 1150 may have a predetermined hole (not shown) formed therein. The buffer member 1150 can accommodate the core body 1020 and the ferrite core 1210 through the predetermined hole.

[0350] 57(a), the buffer member 1150 may include a fourth sealing member 2000d. Specifically, the fourth sealing member 2000d may be formed in the shape of a ring, but is not limited thereto. The fourth sealing member 2000d may be coupled to one end of the buffer member 1150 on the core opening side.

[0351] More specifically, the fourth sealing member 2000d may be configured to block the first moisture inflow path P1' shown in Fig. 50b. As shown in Fig. 57(b), an outer periphery 2000d-1 of the fourth sealing member 2000d may be disposed to closely contact the inner wall of the housing 1010. In this way, the fourth sealing member 2000d can prevent moisture from entering the first moisture inflow path P1'.

[0352] Meanwhile, the fourth sealing member 2000d may be configured to block the second moisture inflow path P2' shown in Fig. 50b. As shown in Fig. 57(b), an inner wall 2000d'-2 of the fourth sealing member 2000d may be disposed to be in close contact with the core 1020 and / or the ferrite core 1210. This allows the fourth sealing member 2000d to prevent moisture from entering the second moisture inflow path P2'. However, the present invention is not limited thereto, and the present invention may include a fourth sealing member 2000d in which the inner wall 2000d'-2 is spaced a predetermined distance from the core 1020 and / or the ferrite core 1210.

[0353] According to one embodiment of the present invention, the fourth sealing member 2000d may be a separate component that is coupled to one end of the buffer member 1150. Alternatively, the fourth sealing member 2000d may be coupled to one end of the buffer member 1150 to form an integral part with the buffer member 1150. However, the present invention is not limited thereto.

[0354] According to an embodiment of the present invention, the fourth sealing member 2000d may be formed through a predetermined process at one end of the buffer member 1150. For example, the fourth sealing member 2000d may be formed through at least one process selected from the group including, but not limited to, a taping process and a coating process.

[0355] A third sealing member, a buffer member, and a fourth sealing member FIG. 58 is a view showing a stylus pen including the sealing member shown in FIG. 56 and the buffer member shown in FIG.

[0356] 58, the stylus pen 1000 may include a third sealing member 2000c and a buffer member 1150. The buffer member 1150 may include a fourth sealing member 2000d. Specifically, the fourth sealing member 2000d and the buffer member 1150 may be arranged facing each other and covering at least a portion of the outer surface of the core 1020 or the ferrite core 1210 near the core opening (not shown). In this way, the third sealing member 2000c and the fourth sealing member 2000d may cooperate with each other to prevent moisture from entering the first moisture inflow path P1' and the second moisture inflow path P2'.

[0357] Third moisture inflow route Figure 59 is a diagram showing a third moisture inflow path through which moisture enters via the button portion of the stylus pen shown in Figure 34. Specifically, (a) of Figure 59 shows a perspective view of the stylus pen and the third moisture inflow path, while (b) of Figure 59 shows a partial perspective view of Figure 59(a) with the housing removed, along with the third moisture inflow path.

[0358] 59, the stylus pen 1000 shown in FIG. 34 may include a button bracket 1190. Specifically, the button bracket 1190 is disposed in the housing 1010 so as to be coupled to the board bracket 1900 and cover at least a portion of the board 2100. In addition, the button bracket 1190 may have a predetermined groove (not shown) formed therein for coupling with the button portion 1090, thereby accommodating the button portion 1090.

[0359] As shown in Fig. 59(a), moisture may flow into the stylus pen 1000 shown in Fig. 34 via a third moisture inflow path P3'. Specifically, as shown in Fig. 59(b), the third moisture inflow path P3' may include a path P3'-1 that passes through the space between the button part 1090 and the housing 1010 and reaches the substrate 2100 via a hole (not shown) formed in the button bracket 1190. Alternatively, the third moisture inflow path P3' may include a path P3'-2 that passes through the space between the button part 1090 and the housing 1010 and reaches the substrate 2100 along the outer surface of the button bracket 1190.

[0360] Fourth water inflow route Figure 60 is a view showing a fourth moisture inflow path through which moisture enters via the connection portion between the housing and the clicker housing in the stylus pen shown in Figure 34. Specifically, Figure 60(a) shows a perspective view of the stylus pen and the fourth moisture inflow path, and Figure 60(b) shows a partial perspective view of Figure 60(a) with the housing removed, along with the fourth moisture inflow path.

[0361] As shown in FIG. 60, the stylus pen 1000 shown in FIG. 34 may include a clicker housing 2300, a clicker cover 2400, a clicker button 2500, and a clicker elastic member 2510.

[0362] Specifically, the clicker button 2500 is arranged to be inserted into a hole (not shown) formed at the end of the clicker housing 2300 opposite the pen tip. The clicker button 2500 may be used to perform a specific operation of the stylus pen 1000. The clicker button 2500 may be pressed in the direction of a core opening (not shown) by an external force.

[0363] Specifically, one end of the clicker elastic member 2510 may be connected to the clicker button 2500. The other end of the clicker elastic member 2510 may be connected to the clicker housing 2300. When the clicker button 2500 is pressed toward the core opening, the clicker elastic member 2510 is compressed and can store elastic energy. When the force pressing the clicker button 2500 is released, the elastic energy stored in the clicker elastic member 2510 causes the clicker button 2500 to move in the opposite direction to the core opening.

[0364] Specifically, the clicker cover 2400 and the clicker housing 2300 are disposed inside the housing 1010 to surround the clicker button 2500 and the clicker elastic member 2510. The clicker housing 2300 may have a hole formed therein to accommodate the clicker button 2500. The clicker housing 2300 may be coupled to the clicker cover 2400. The clicker cover 2400 may be connected to the clicker housing 2300 via a predetermined fastening portion (not shown) and may be coupled to an end of the board bracket 1900. Meanwhile, as described above, the clicker cover 2400 may have a predetermined groove (not shown) formed in the vicinity of the portion coupled to the board bracket 1900.

[0365] As shown in Fig. 60(a), moisture may flow into the stylus pen 1000 shown in Fig. 34 through a fourth moisture inflow path P4'. Specifically, as shown in Fig. 60(b), the fourth moisture inflow path P4' is a path that passes through the coupling portion between the housing 1010 and the clicker housing 2300, and reaches the substrate 2100 along the outer surfaces of the clicker housing 2300 and the clicker cover 2400.

[0366] Packing material FIG. 61 is a view showing a packing member for blocking the third moisture inflow path in the stylus pen shown in FIG.

[0367] 61, the stylus pen 1000 shown in FIG. 34 may include a packing member 1290. Specifically, the packing member 1290 may be coupled to the button bracket 1190 through a predetermined groove (not shown) formed in the button bracket 1190. In addition, the packing member 1290 may separate a hole (not shown) formed in the button bracket 1190 to block the third moisture inflow path P3′ shown in FIG. 59. The packing member 1290 may be disposed to be in close contact with the button bracket 1190.

[0368] 61, a protrusion 1291 may be formed on the edge of the packing member 1290. Specifically, the protrusion 1291 may be formed to closely contact the inner wall of the housing 1010.

[0369] As a result, the packing member 1290 can prevent moisture from entering through the third moisture inflow path P3', which passes through the space between the button portion 1090 and the housing 1010 and reaches the substrate 2100 via a hole formed in the button bracket 1190 or along the outer surface of the button bracket 1190.

[0370] Fifth sealing element Figure 62 is a diagram showing one embodiment of a sealing member that blocks the fourth moisture inflow path in the stylus pen shown in Figure 60. Specifically, Figure 62(a) shows the sealing member in a portion of a perspective view of the stylus pen when the housing is removed. Also, Figure 62(b) is a portion of a cross-sectional view taken along line E-E' in Figure 62(a).

[0371] As shown in Fig. 62(a), the stylus pen 1000 shown in Fig. 34 may include a fifth sealing member 2000e for blocking the fourth moisture inflow path P4' shown in Fig. 60. Specifically, the fifth sealing member 2000e may be disposed in a groove (not shown) formed in the clicker cover 2400 near the portion where the clicker cover 2400 is coupled to the board bracket 1900. The fifth sealing member 2000e may cover the outer surface of the clicker cover 2400 in the groove formed in the clicker cover 2400.

[0372] As shown in Figure 62(b), the fifth sealing member 2000e may be disposed to closely contact the inner wall of the housing 1010 shown in Figure 34. In this way, the fifth sealing member 2000e can prevent moisture from entering the fourth moisture inflow path P4'.

[0373] One embodiment of a stylus pen including a plurality of sealing members FIG. 63 is a diagram showing a plurality of waterproofing means provided in the stylus pen shown in FIG.

[0374] As shown in Fig. 63, the stylus pen 1000 shown in Fig. 34 may include a plurality of waterproofing means. Specifically, the waterproofing means are intended to block a path through which moisture can enter the inside of the stylus pen 1000.

[0375] For example, the path through which moisture flows may be at least one path selected from the group including the first moisture inflow path P1′, the second moisture inflow path P2′, the third moisture inflow path P3′, and the fourth moisture inflow path P4, but is not limited thereto.

[0376] For example, the waterproofing means may be at least one selected from the group including the buffer member 1150 including the first sealing member 2000a, 2000a', the second sealing member 2000b, the third sealing member 2000c, and the fourth sealing member 2000d, the fifth sealing member 2000e, and the packing member 1290. However, the waterproofing means is not limited thereto.

[0377] 63, the stylus pen 1000 shown in Fig. 34 may include a buffer member 1150 including a first sealing member 2000a', a third sealing member 2000c, and a fourth sealing member 2000d, a packing member 1290, and a fifth sealing member 2000e. This allows the stylus pen 1000 to prevent moisture from entering the interior through the first moisture inflow path P1', the second moisture inflow path P2', the third moisture inflow path P3', and the fourth moisture inflow path P4'.

[0378] As described above with reference to Fig. 52b, the first sealing member 2000a' may be disposed to cover at least a portion of the outer surface of the fixing bracket 1600. The first sealing member 2000a' may also be disposed to be in close contact with the inner wall of the housing 1010. In this way, the first sealing member 2000a' can prevent moisture from entering through the first moisture inflow path P1'.

[0379] 56, the third sealing member 2000c may be disposed to cover at least a portion of the outer surface of the ferrite core 1210. Specifically, the third sealing member 2000c may cover at least a portion of the outer surface of the ferrite core 1210 near a core opening (not shown). Additionally, the third sealing member 2000c may be disposed to face the coil portion 1230, but is not limited thereto.

[0380] Also, the third sealing member 2000c may be disposed to be in close contact with the inner wall of the housing 1010. In this way, the third sealing member 2000c can prevent moisture from entering the first moisture inflow path P1'.

[0381] 57, the stylus pen 1000 may include a buffer member 1150. Specifically, the buffer member 1150 may be arranged to cover at least a portion of the outer surface of each of the core body 1020 and the ferrite core 1210 near the core body opening.

[0382] The buffer member 1150 may also include a fourth sealing member 2000d. Specifically, the fourth sealing member 2000d may be formed in the shape of a ring, but is not limited thereto. The fourth sealing member 2000d may be coupled to one end of the buffer member 1150 on the core opening side.

[0383] More specifically, the fourth sealing member 2000d may be configured to block the first moisture inflow path P1'. As shown in Fig. 57(b), an outer periphery 2000d-1 of the fourth sealing member 2000d may be disposed to be in close contact with the inner wall of the housing 1010. In this way, the fourth sealing member 2000d can prevent moisture from entering the first moisture inflow path P1'.

[0384] Furthermore, the fourth sealing member 2000d may be configured to block the second moisture inflow path P2'. As shown in Fig. 57(b), an inner wall 2000d'-2 of the fourth sealing member 2000d may be disposed to be in close contact with the substrate 1020 and / or the ferrite core 1210. In this way, the fourth sealing member 2000d can prevent moisture from entering the second moisture inflow path P2'.

[0385] According to one embodiment of the present invention, the fourth sealing member 2000d may be a separate component that is coupled to one end of the buffer member 1150. Alternatively, the fourth sealing member 2000d may be coupled to one end of the buffer member 1150 to form an integral part with the buffer member 1150. However, the present invention is not limited thereto.

[0386] According to an embodiment of the present invention, the fourth sealing member 2000d may be formed through a predetermined process at one end of the buffer member 1150. For example, the fourth sealing member 2000d may be formed through at least one process selected from the group including, but not limited to, a taping process and a coating process.

[0387] As described above with reference to Fig. 61, the stylus pen 1000 shown in Fig. 34 may include a packing member 1290. Specifically, the packing member 1290 may be coupled to the button bracket 1190 through a predetermined groove (not shown) formed in the button bracket 1190. In addition, the packing member 1290 may block a hole (not shown) formed in the button bracket 1190 to block the third moisture inflow path P3'. The packing member 1290 may be disposed to be in close contact with the button bracket 1190.

[0388] In addition, the packing member 1290 may have a protrusion 1291 formed on the edge thereof. Specifically, the protrusion 1291 may be formed to come into close contact with the inner wall of the housing 1010.

[0389] As a result, the packing member 1290 can prevent moisture from entering through the third moisture inflow path P3', which passes through the space between the button portion 1090 and the housing 1010 and reaches the substrate 2100 via a hole formed in the button bracket 1190 or along the outer surface of the button bracket 1190.

[0390] 62, the stylus pen 1000 shown in FIG. 34 may include a fifth sealing member 2000e for blocking the fourth moisture inflow path P4'. Specifically, the fifth sealing member 2000e may be disposed in a groove (not shown) formed in the clicker cover 2400 near the portion where the clicker cover 2400 is coupled to the board bracket 1900. The fifth sealing member 2000e may cover the outer surface of the clicker cover 2400 in the groove formed in the clicker cover 2400.

[0391] Also, the fifth sealing member 2000e may be disposed to be in close contact with the inner wall of the housing 1010. In this way, the fifth sealing member 2000e can prevent moisture from entering the fourth moisture inflow path P4'.

[0392] 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.

[0393] 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.

Claims

1. In the stylus pen, Housing and a core body having one end disposed outside the housing and the remainder disposed inside the housing, the core body being configured to move along a longitudinal direction in response to an external force acting on the one end; an inductor portion disposed inside the housing and including a ferrite core having a through hole through which the core passes and a coil wound on an outer surface of the ferrite core; a capacitor unit electrically connected to the inductor unit to form a resonant circuit; at least one sealing member configured to block a plurality of moisture ingress paths through the core opening of the housing; Including, Stylus pen.

2. The plurality of moisture inflow paths are a first moisture inflow path through which moisture passes through the core opening of the housing and flows into the inside of the stylus pen via a space between the housing and the inductor portion; a second moisture inflow path through which moisture passes through the core opening of the housing and flows into the inside of the stylus pen via the through hole of the ferrite core; Including, The stylus pen according to claim 1 .

3. The at least one sealing member is a first sealing member configured to block the first moisture inflow path; a second sealing member configured to block the second moisture inflow path; Including, The stylus pen according to claim 2 .

4. The first sealing member is arranged to cover at least a portion of the outer surface of the ferrite core and is arranged in close contact with the inner wall of the housing. The stylus pen according to claim 3 .

5. a fixing bracket fixedly disposed within the housing and coupled to one end of the ferrite core, The first sealing member is disposed so as to cover at least a portion of the outer surface of the fixing bracket and is disposed in close contact with the inner wall of the housing. The stylus pen according to claim 3 .

6. a fixing bracket fixedly disposed within the housing and coupled to one end of the ferrite core, the fixing bracket includes a partition wall in contact with the ferrite core; the second sealing member is disposed on the partition wall so that the core body fills the outer contour of the through-hole of the partition wall through which the core body penetrates the partition wall, and is disposed in close contact with the core body at a portion where the core body penetrates the through-hole of the partition wall, The stylus pen according to claim 3 .

7. In the stylus pen, Housing and a core body having one end disposed outside the housing and the remainder disposed inside the housing, the core body being configured to move along a longitudinal direction in response to an external force acting on the one end; an inductor portion disposed inside the housing and including a ferrite core having a through hole through which the core passes and a coil wound on an outer surface of the ferrite core; a capacitor unit electrically connected to the inductor unit to form a resonant circuit; a sealing member configured to block a path through which moisture passes through the core opening of the housing and enters the inside of the stylus pen via the through-hole of the ferrite core; Including, Stylus pen.

8. a fixing bracket fixedly disposed within the housing and coupled to one end of the ferrite core, the fixing bracket includes a partition wall in contact with the ferrite core; the sealing member is disposed on the partition wall so as to fill an outer contour of the through-hole of the partition wall through which the core body passes, and is disposed so as to be in close contact with the core body at a portion where the core body passes through the through-hole of the partition wall.

8. The stylus pen according to claim 7.

9. The sealing member includes a cylindrical contact portion having a height equal to the longitudinal height of the core body, and is disposed so as to be in close contact with the core body at the contact portion.

9. The stylus pen according to claim 8.

10. The contact portion maintains a state in which at least a portion of the contact portion is in contact with the core body when the core body moves in the longitudinal direction.

10. The stylus pen according to claim 9.

11. In the stylus pen, Housing and a core body having one end disposed outside the housing and the remainder disposed inside the housing, the core body being configured to move along a longitudinal direction in response to an external force acting on the one end; an inductor portion disposed inside the housing and including a ferrite core having a through hole through which the core passes and a coil wound on an outer surface of the ferrite core; a capacitor unit electrically connected to the inductor unit to form a resonant circuit; a buffer member disposed between the inner surface of the housing and the other end of the ferrite core so as to cover at least a portion of the other end of the ferrite core; a sealing member that can block a path of moisture passing through the core opening of the housing and entering the inside of the stylus pen via a space between the housing and the inductor part; Including, Stylus pen.

12. the buffer member is disposed so as to be in close contact with the housing and the other end of the ferrite core; The stylus pen according to claim 11.

13. The other end of the ferrite core may have a tapered shape in which the diameter or width decreases toward the end, and may include at least one curved surface portion whose outer surface is curved inward. The stylus pen according to claim 12.

14. The buffer member may have a smaller thickness than when the other end of the ferrite core does not include the curved surface portion. The stylus pen according to claim 13.

15. The sealing member is disposed so as to cover an outer surface of the ferrite core and is disposed in close contact with an inner wall of the housing.

15. The stylus pen according to claim 14.

16. a fixing bracket fixedly disposed within the housing and coupled to one end of the ferrite core, The sealing member is disposed so as to cover the fixing bracket and is disposed in close contact with the inner wall of the housing.

15. The stylus pen according to claim 14.

17. In the stylus pen, Housing and a core body having one end disposed outside the housing and the remainder disposed inside the housing, the core body being configured to move along a longitudinal direction in response to an external force acting on the one end; an inductor portion disposed inside the housing and including a ferrite core having a through hole through which the core passes and a coil wound on an outer surface of the ferrite core; a capacitor unit electrically connected to the inductor unit to form a resonant circuit; a buffer member disposed between the housing and the other end of the ferrite core, the buffer member being disposed to cover at least a portion of the other end of the ferrite core, the buffer member including a fourth sealing member at one end; Including, The sealing member is disposed so that the outer periphery thereof is in close contact with the inner wall of the housing. Stylus pen.

18. the fourth sealing member is taped or coated on one surface of the buffer member; 18. The stylus pen according to claim 17.

19. The fourth sealing member is arranged so that its inner shell is in close contact with the core body or the ferrite core.

18. The stylus pen according to claim 17.

20. The fourth sealing member has an inner wall spaced apart from the core body or the ferrite core by a predetermined distance.

18. The stylus pen according to claim 17.

21. a third sealing member that covers at least a portion of the outer surface of the ferrite core and is disposed so as to be in close contact with the housing; further comprising:

18. The stylus pen according to claim 17.

22. the third sealing member is positioned to abut the coil.

22. The stylus pen of claim 21.

23. a fixing bracket fixedly disposed within the housing and coupled to one end of the ferrite core; a first sealing member disposed to cover at least a portion of an outer surface of the fixing bracket and to be in close contact with the housing; further comprising:

18. The stylus pen according to claim 17.

24. a button portion disposed on an outer surface of the housing; a button bracket fixedly disposed within the housing and coupled to the button portion; a packing member coupled to the button bracket and disposed to be in close contact with the button bracket; further comprising:

18. The stylus pen according to claim 17.

25. a substrate bracket fixedly disposed inside the housing and covering the capacitor unit; a clicker button configured to move along a longitudinal direction by an external force acting on one end thereof; a clicker housing, one end of which is coupled to the housing and which is disposed inside the housing to surround the clicker button; a clicker cover that connects the base bracket and the clicker housing inside the housing; a fifth sealing member disposed to surround a predetermined groove formed in the clicker cover near a portion where the clicker cover and the base bracket are connected; and Including, The fifth sealing member is disposed in close contact with the housing.

18. The stylus pen according to claim 17.

Images