Ferrite magnetic core and stylus comprising same

Abstract

The present invention relates to a ferrite core for a stylus and a stylus including the same, and more particularly, to a ferrite core for a stylus and a stylus including the same, which are suitable for a case having a specific shape and capable of increasing the magnitude of a pen signal received at a receiver side. A ferrite core according to an embodiment of the present invention is a ferrite core mounted inside a stylus and having a through-hole formed along a longitudinal direction of the stylus, the ferrite core has a first cross-sectional shape in a first vertical direction perpendicular to the longitudinal direction and a second cross-sectional shape in a second vertical direction perpendicular to the longitudinal direction and the first vertical direction, the first cross-sectional shape is different from the second cross-sectional shape, and the ferrite core includes a curved surface portion disposed at one end of the ferrite core. The curved surface portion includes at least two curved surfaces that are curved in the through-hole side direction from one side surface of one end portion of the ferrite core to a portion adjacent to the through-hole of the ferrite core.

Description

Technical Field

[0001] The present invention relates to a ferrite core and a stylus pen including the same, and more particularly to a ferrite core for a stylus pen capable of increasing the magnitude of a pen signal received by a receiver side and a stylus pen including the same. Background Art

[0002] A stylus is a pen-shaped device that can be used to input data by lightly touching the screen when dragging or clicking on it. Users use a stylus for precise touch input.

[0003] Styluses can be divided into active styluses and passive styluses according to whether they have batteries and electronic components inside.

[0004] Compared with passive styluses, active styluses have the advantages of excellent basic performance and the ability to provide additional functions (pen pressure, hovering, buttons), but the disadvantage is that the pen itself is expensive and requires power, which is a charging method. Therefore, except for some advanced users, there are not many actual users.

[0005] The advantages of a passive stylus are that it is cheaper than an active stylus and does not require batteries, but its disadvantage is that it is difficult to accurately recognize touches compared to an active stylus. However, recently, in order to realize a passive stylus that can accurately recognize touches, the EMR (Electro Magnetic Resonance) method and the capacitive resonance method have been proposed as inductive resonance methods.

[0006] For the EMR method, the writing / drawing quality, which is the core function of the stylus, is advantageous, but in addition to the capacitive touch panel, an additional EMR sensor panel and EMR driver IC are required, so there are disadvantages of being thick and more expensive.

[0007] The capacitive resonance method uses a general capacitive touch sensor and touch controller IC to further support pen touch by improving the performance of the IC without incurring additional costs.

[0008] In the EMR method or the capacitor resonance method, in order for the touch sensor to more accurately recognize the touch of the stylus, the amplitude of the resonance signal must be large, so the frequency of the drive signal transmitted to the stylus is made almost the same as the resonance frequency of the resonance circuit built into the stylus. However, according to the existing EMR method or the capacitor resonance method, even if the resonance frequency and the frequency of the drive signal are consistent, there is a problem of difficulty in signal transmission due to the very large attenuation of signal transmission. As a result, although many touch controller IC suppliers have tried for a long time, they have not been able to obtain sufficient output signals, so no company has succeeded in mass production so far.

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

[0010] Figure 1 (a) to (c) are diagrams for explaining one requirement of a conventional stylus pen.

[0011] include Figure 1 The appearance design of conventional stylus pens including stylus pens 10a and 10b shown in (a) to (c) should take into consideration the user's environment and meet predetermined requirements.

[0012] One of the requirements is that it is necessary to be able to perform drawing in a state where the existing stylus pens 10 a and 10 b are tilted at a predetermined angle (for example, 60°) to a predetermined contact surface 31 .

[0013] In particular, after some existing styluses 10a and 10b come into contact with the surface of the display panel 300, when a certain force F is applied, the pen tip is pressed and a portion of it enters the interior of the housing 19. Even when the pen tip is pressed and tilted at a predetermined angle (for example, 60°), some styluses 10a and 10b should not have problems with drawing.

[0014] As a result, when the conventional stylus pen 10 a , 10 b is tilted relative to the contact surface 31 , the tilting at a predetermined angle (eg, 60°) should not be disturbed by the external appearance of the stylus pen 10 a , 10 b (eg, the housing 19 ).

[0015] Figure 2 FIG. 1 is a diagram schematically showing the internal structure of a conventional stylus pen.

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

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

[0018] Inductor parts 13 and 13 ′ and capacitor part 15 are electrically connected to each other to form an LC resonance part, which is configured to resonate with a driving signal provided from a transmitter side located outside stylus 10 c and 10 d to emit a predetermined signal (hereinafter referred to as a pen signal) through resonance.

[0019] Figure 2 The shape of the ferrite core 131' of the inductor portion 13' of the stylus pen 10d shown on the right side is different from the shape of the ferrite core 131 of the inductor portion 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 (hereinafter referred to as a taper shape) in which the width becomes thinner as the lower end portion moves downward. With the above-mentioned taper shape, the ferrite core 131' can be configured to be closer to the lower end portion side (or the pen tip side) in the housing 19 by a predetermined length H.

[0020] exist Figure 2 In the conventional stylus 10c and 10d shown in the figure, the magnitude of the pen signal received by the receiver side outside the stylus 10c and 10d may be different depending on the configuration position of the inductor part 13 and 13' in the housing 19. If possible, it is preferable to determine the position of the inductor part 13 and 13' so that the magnitude of the pen signal increases.

[0021] because Figure 2 The ferrite core 131' of the stylus pen 10d shown on the right side is arranged closer to the pen tip than the ferrite core 131 of the stylus pen 10c shown on the left side, so the size of the pen signal received by the receiver side is relatively larger. However, in the case of relying solely on the conical shape of the ferrite core 131' of the stylus pen 10d shown on the right side, there is a limitation in maximizing the size of the pen signal received by the receiver side.

[0022] Therefore, it is also important to stably accommodate the inductor parts 13 , 13 ′ inside the housing 19 while maximizing the size of the pen signal received by the receiver side. Summary of the invention

[0023] Issues to be addressed:

[0024] An object of the present invention is to provide a ferrite core suitable for a housing having a specific shape and a stylus pen including the ferrite core.

[0025] In addition, a ferrite core capable of increasing the size of a pen signal received on a receiver side and a stylus pen including the same are provided.

[0026] In addition, a ferrite core capable of clearly distinguishing a hovering state and a contact state of a stylus pen and a stylus pen including the ferrite core are provided.

[0027] In addition, a ferrite core capable of synchronizing the movement of a magnet and a core and a stylus pen including the same are provided.

[0028] In addition, a ferrite core that can electrically connect electrical components without using a wire internally and a stylus pen including the same are provided.

[0029] In addition, a ferrite core capable of miniaturizing a stylus pen and a stylus pen including the ferrite core are provided.

[0030] In addition, a ferrite core capable of stably housing an inductor unit inside a case and a stylus pen including the ferrite core are provided.

[0031] In addition, a ferrite core capable of drawing even when tilted at a predetermined angle and a stylus pen including the ferrite core are provided.

[0032] Solution to the problem:

[0033] According to an embodiment of the present invention, the ferrite core is a ferrite core installed inside a stylus pen and has a through hole formed along the length direction of the stylus pen, the ferrite core has a first cross-sectional shape in a first vertical direction perpendicular to the length direction, and a second cross-sectional shape in a second vertical direction perpendicular to the length direction and the first vertical direction, the first cross-sectional shape is different from the second cross-sectional shape, the ferrite core includes a curved portion arranged at one end of the ferrite core, the curved portion includes at least two or more curved surfaces bent toward the through hole side direction from a side surface of one end of the ferrite core to a portion adjacent to the through hole of the ferrite core.

[0034] The stylus pen according to an embodiment of the present invention comprises: a shell; a core body, which is configured with one end portion arranged outside the shell and the rest arranged inside the shell, and is moved along the length direction by an external force acting on the one end portion; an inductor portion, which is arranged inside the shell and includes a ferrite core having a through hole passing through the core body and a coil wound outside the ferrite core; a fixed bracket, which is fixedly arranged inside the shell and combined with the other end portion of the ferrite core; and a movable bracket, which is arranged inside the fixed bracket and is configured to surround the other end portion of the core body and is connected to the fixed bracket. The core body is linked to be synchronized with the movement of the core body, the ferrite core has a first cross-sectional shape in a first perpendicular direction perpendicular to the length direction, and a second cross-sectional shape in a second perpendicular direction perpendicular to the length direction and the first perpendicular direction, the first cross-sectional shape is different from the second cross-sectional shape, the ferrite core includes a curved portion arranged at one end of the ferrite core, the curved portion includes at least two or more curved surfaces bent toward the through hole side from a side surface of one end of the ferrite core to a portion adjacent to the through hole of the ferrite core.

[0035] Effects of the invention:

[0036] When the ferrite core according to the embodiment of the present invention and the stylus pen including the same are used, it is possible to fit into a housing having a specific shape.

[0037] In addition, there is an advantage in that the size of the pen signal received on the receiver side can be increased.

[0038] In addition, there is an advantage in that the hovering state and the contact state of the stylus pen can be clearly distinguished.

[0039] In addition, there is an advantage in that the movement of the magnet and the core can be synchronized.

[0040] In addition, there is an advantage that electrical components can be electrically connected without using wires inside.

[0041] In addition, there is an advantage that the stylus pen can be miniaturized.

[0042] In addition, there is an advantage that the inductor unit can be stably housed inside the case.

[0043] In addition, there is an advantage that drawing can be performed even when the image is tilted at a predetermined angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 (a) to (c) are diagrams for explaining a requirement of a conventional stylus pen;

[0045] Figure 2 is a diagram briefly showing the internal structure of a conventional stylus pen;

[0046] Figure 3 is a perspective view of a stylus pen 100 according to one embodiment of the present invention;

[0047] Figure 4 yes Figure 3 A cross-sectional view of a portion A of the stylus pen 100 is shown;

[0048] Figure 5 yes Figure 4 A detailed cross-sectional view of the inductor portion 120 is shown;

[0049] Figure 6 (a) to (b) are used to illustrate Figures 4 to 5 A diagram illustrating the internal structure of a stylus pen and its effects according to one embodiment of the present invention;

[0050] Figure 7 (a) to (c) are used to explain in more detail Figures 4 to 5 A diagram illustrating the internal structure of a stylus pen and its effects according to one embodiment of the present invention;

[0051] Figure 8 It is used to explain the Figure 7 (a) to (c) illustrate graphs showing an increase in the magnitude of a pen signal at a predetermined height S;

[0052] Fig. 9 yes Figure 3 A cross-sectional view of a portion of the stylus 100 is shown;

[0053] Fig.10 (a) is used to illustrate Fig. 9 The structure of the inner shell 110 and the buffer component 115 is shown in the perspective view. Fig.10 (b) is a perspective view of only the inner housing 110;

[0054] Fig.11 It has been removed Fig.10 (a) is a perspective view of the case where the inner shell 110 is shown;

[0055] Fig.12 (a) and (b) are observed from multiple sides. Fig. 9 and Fig.11 A perspective view of the first fixing member 130 is shown;

[0056] Fig.13 (a) and (b) are observed from multiple sides. Fig. 9 and Fig.11 A perspective view of the illustrated moving member 170;

[0057] Fig.14 (a) and (b) are observed from multiple sides. Fig. 9 and Fig.11 A perspective view of the second fixing member 190 is shown;

[0058] Fig.15 Observed from one side Fig. 9 and Fig.11 A three-dimensional diagram of the parts shown;

[0059] Fig.16 (a) and (b) are Fig. 9 and Fig.11 A three-dimensional view of only a portion of the composition shown;

[0060] Fig.17 (a) to (c) are used to illustrate Figures 9 to 16 A diagram illustrating the motion of the stylus 100;

[0061] Fig.18 (a) is an example diagram based on Fig.17 A diagram showing the change in the LC value of the resonant circuit portion during the operation from (a) to (c);

[0062] Fig.18 (b) is shown in Fig.17 Graphs of frequency characteristics in each operating state from (a) to (c);

[0063] Fig.19(a) to (c) are used to illustrate Figures 9 to 17 The illustrated diagram shows a problem that occurs when the stylus pen 100 is assembled due to assembly deviation of the core 102 ;

[0064] Fig. 20 Yes Fig.19 Each of (a) to (c) shows a graph showing a change in resonance frequency according to pressure applied to the core 102;

[0065] Fig.21 (a) to (c) are Figures 9 to 17 The illustrated diagram shows a problem that occurs when the stylus pen 100 is assembled due to assembly deviation of the access terminals 165 a and 165 b ;

[0066] Fig. 22 is based on Figure 3 A cross-sectional view of a portion of a stylus according to a modified embodiment of the stylus 100 is shown;

[0067] Fig.23 (a) and (b) are used to illustrate Fig. 22 A diagram of the illustrated first elastic member 180';

[0068] Fig.24 (a) to (c) are used to illustrate Figure 22 to Figure 23 a diagram illustrating the motion of the stylus;

[0069] Fig.25 (a) and (b) are diagrams showing examples of assembly deviation of the core 102;

[0070] Fig.26 Yes Fig.25 Each of (a) and (b) is a graph showing a change in resonance frequency according to pressure applied to the core 102;

[0071] Fig. 27 is based on Figures 4 to 5 A perspective view of a modified example of the ferrite core 121 shown in the figure;

[0072] Fig.28 (a) is Fig. 27 The enlarged front view of a portion of the ferrite core 121' is shown in FIG. Fig.28 (b) is to Fig.28 (a) A-A' cross-sectional view;

[0073] Fig.29 Is adopted Figure 4 A cross-sectional view of a stylus pen according to another variation of the ferrite core 121 shown in the figure;

[0074] Fig.30 Only shows Fig.29A cross-sectional view of the ferrite core 121″ and the coil portion 123 shown;

[0075] Fig.31 yes Figure 29 to Figure 30 A perspective view of the ferrite core 121 ″ shown in the figure;

[0076] Fig.32 (a) is Fig.31 An enlarged front view of a portion of the ferrite core 121" is shown. Fig.32 (b) is to Fig.31 (a) BB' cross-sectional view;

[0077] Fig.33 is a perspective view of a stylus pen 1000 according to another embodiment of the present invention;

[0078] Fig.34 yes Fig.33 A cross-sectional view of a portion of the stylus 1000 is shown;

[0079] Fig.35 It has been removed Fig.33 A perspective view of the housing 1010 of the stylus pen 1000 is shown;

[0080] Fig.36 is only Fig.25 A perspective view of the fixing bracket 1600 is shown;

[0081] Fig.37 Observe from other directions Fig.36 A perspective view of the fixing bracket 1600 is shown;

[0082] Fig.38 Observe from other directions Fig.35 a portion of a stereogram;

[0083] Fig.39 It has been removed Fig.35 A perspective view of the inductor portion 1200 and the fixing bracket 1600 is shown;

[0084] Fig.40 Observe from other directions Fig.39 Stereoscopic image of

[0085] Fig.41 yes Fig.39 sectional view of

[0086] Fig.42 is only Fig.39 A perspective view of the elastic member 1800 is shown;

[0087] Fig.43 yes Fig.39 A perspective view of the substrate support 1900 and the substrate 2100 is shown;

[0088] Fig.44 It is used to explain the Figures 35 to 43 The movement of the core 1020, the movement of the mobile bracket 1300, and the electrical contact and release of the contact between the fixed bracket 1600 and the mobile bracket 1300 are shown;

[0089] Fig.45 The diagrams are respectively Fig.44 (A) and (B);

[0090] Fig.46 is to simplify the stylus according to other embodiments of the present invention. Fig.44 (A) and (B) are respectively constituted as equivalent circuit diagrams;

[0091] Fig.47 is observed from the side of the core 1020 according to Fig.33 A perspective view of a stylus pen 1000 according to another embodiment of the present invention is shown;

[0092] Fig.48 (A) is cut towards A-A' Fig.47 A portion of a cross-sectional view of stylus 1000 is shown;

[0093] Fig.48 (B) is cut towards B-B' Fig.47 A portion of a cross-sectional view of stylus 1000 is shown;

[0094] Fig.49 It is shown Figure 47 to Figure 48 The ferrite core 1210 is shown in side view A, B and cross-sectional view.

[0095] Fig.50 It is used to illustrate Fig.49 A diagram showing a modified example of the ferrite core 1210 is shown;

[0096] Fig.51 yes Fig.50 The illustrated diagram is a perspective view of an inductor unit 1200 ′ in which a coil 1230 ′ is wound around the outer surface of a ferrite core 1210 ′. DETAILED DESCRIPTION

[0097] The following detailed description of the invention refers to the accompanying drawings that illustrate specific embodiments that can implement the invention as examples. These embodiments are described in detail so that a person of ordinary skill in the art can implement the invention. It should be understood that the various embodiments of the invention, although different from each other, are not necessarily mutually exclusive. For example, the specific shape, structure and characteristics of an embodiment described herein can be implemented in other embodiments without departing from the spirit and scope of the invention. In addition, it should be understood that the position or configuration of individual constituent elements within each disclosed embodiment can be changed without departing from the spirit and scope of the invention. Therefore, the following detailed description is not intended to be limiting, and the scope of the invention is limited to all scopes and the appended claims that are the same as the claims of the claim when properly described. Similar figure numbers in the figures refer to the same or similar functions in many aspects.

[0098] Figure 3 is a perspective view of a stylus pen 100 according to an embodiment of the present invention.

[0099] Reference Figure 3 , a stylus pen 100 according to one embodiment of the present invention includes a housing 101 and a core 102 .

[0100] The housing 101 forms the appearance of the stylus pen 100. A predetermined space is formed inside the housing 101, which has a shape elongated in one direction. The housing 101 may be formed by combining two or more parts, or may be formed as one integrated part.

[0101] The housing 101 may be made of a non-conductive synthetic resin material.

[0102] 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 appearance of the stylus pen 100. Various components are accommodated inside the first housing 101a and the second housing 101b.

[0103] The housing 101 may be provided with a button portion 109. The button portion 109 may be provided outside the middle of the second housing 101b. The button portion 109 may be used to execute a specific action of the stylus pen 100. For example, it may be a mechanical or contact button for executing a cancel action.

[0104] The core 102 includes an end portion disposed outside the housing 101, and the rest of the core 102 except the end portion is disposed inside the housing 101. The end portion of the core 102 may also be named as a pentip.

[0105] By an external force from the outside, a part of one end of the core 102 can move into the shell 101. The larger the external force, the larger the volume of the part of one end of the core 102 that enters the shell 101. When the applied external force decreases, the part of one end of the core 102 re-extends out of the shell 101 through the mechanical action of the components inside the shell 101. When the external force disappears, the part of one end of the core 102 returns to the original state.

[0106] The following reference Figures 4 to 5 The structure inside the housing 101 will be described.

[0107] Figure 4 yes Figure 3 The cross-sectional view of the portion A of the stylus pen 100 is shown in FIG. Figure 5 yes Figure 4 A detailed cross-sectional view of the inductor portion 120 is shown.

[0108] Reference Figure 4 and Figure 5 According to one embodiment of the present invention, the stylus pen 100 includes a buffer component 115 , an inductor portion 120 , and a capacitor portion (not shown) disposed inside a housing 101 .

[0109] The buffer member 115 is disposed inside the housing 101, 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. The tapered portion 101t of the housing 101 is a portion of the housing 101 adjacent to one end of the core 102, and has a shape in which the width or width decreases as it approaches the end of one end of the housing 101.

[0110] The buffer component 115 has a conical or polygonal pyramid shape and has a through hole through which one side end of the ferrite core 121 and the body 102a of the core 102 pass. The inner side 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. The body 102a of the core 102 is a portion of the core 102 that is elongated in one direction and is disposed in the through hole of the ferrite core 121.

[0111] In order to play a buffering role between the ferrite core 121 and the housing 101, the buffer component 115 can be made of an elastic material such as rubber. Such a buffer component 115 can protect the housing 101 or the ferrite core 121, etc., or block external electrical or magnetic influences.

[0112] The buffer member 115 has a shape surrounding one end portion of the ferrite core 121 or the lower end portion 121 b of the ferrite core 121 .

[0113] The imaginary tangent line L1 that is tangent to both the tapered portion 101t of the housing 101 and a portion of the core 102 disposed outside the housing 101 (or the pen tip) forms a predetermined angle θ with the central axis Y of the core 102. It is preferred that the predetermined angle θ is within 30°. When the predetermined angle θ is within 30°, the stylus according to one embodiment of the present invention can also draw when tilted 60° relative to the contact surface.

[0114] The inductor unit 120 may form an LC resonance unit with the capacitor unit (not shown). The resonance frequency may be set by the inductance L value of the inductor unit 120 and the capacitance C value of the capacitor unit (not shown). The resonance frequency may change with the change of the inductance L value of the inductor unit 120 or the capacitance C value of the capacitor unit (not shown).

[0115] The inductor portion 120 includes a ferrite core 121 and a coil portion 123 wound around the outer surface of the ferrite core 121 .

[0116] The coil portion 123 may be wound around the ferrite core 123 by at least one layer.

[0117] The ferrite core 121 may have a cylindrical or polygonal cylindrical shape as a whole, and a through hole 121 h penetrating the inside may be formed along the length direction of the ferrite core 121 .

[0118] The ferrite core 121 has a through portion 121h through which the body 102a of the core 102 passes. The body 102a of the core 102 can perform linear reciprocating motion along the length direction through the through portion 121h.

[0119] One end of the ferrite core 121 may have a tapered shape in which the diameter or width decreases toward the end portion, wherein the outer surface of the tapered end may include at least one curved surface portion 121c that is bent inward.

[0120] The ferrite core 121 may include an upper end portion 121a and a lower end portion 121b disposed below the upper end portion 121a. The upper end portion 121a and the lower end portion 121b may be integrally formed.

[0121] The upper end portion 121a has a shape of a cylinder, an elliptical cylinder or a polygonal cylinder. The diameter or width of the cylinder or the polygonal cylinder may be constant as shown in the figure. Alternatively, the diameter or width of the cylinder, the elliptical cylinder or the polygonal cylinder may not be constant, and the diameter or width of one part is different from the diameter or width of other parts.

[0122] A part of a through hole 121h through which the main body 102a of the core 102 passes is formed inside the upper end portion 121a. The coil portion 123 is arranged on the outer surface of the upper end portion 121a.

[0123] The remaining portion of the through hole 121 h through which the main body 102 a of the core 102 passes is formed inside the lower end portion 121 b.

[0124] The lower end portion 121b has a tapered shape whose width gradually tapers from top to bottom, and at least a portion of the outer surface of the lower end portion 121b has a curved surface portion 121c that curves toward the inner side of the lower end portion 121b. There may be at least one curved surface portion 121c. The following describes the technical effects of a stylus according to an embodiment of the present invention including a ferrite core 121 having such a curved surface portion 121c with reference to the accompanying drawings.

[0125] Figure 6 (a) to (b) are used to illustrate Figures 4 to 5 The figure shows the internal structure and effect of the stylus according to one embodiment of the present invention. Specifically, Figure 6 (b) is Figures 4 to 5 The figure shows a cross-sectional view of a stylus according to one embodiment of the present invention, Figure 6 (a) is to Figure 6 The ferrite core 121 of (b) is replaced by Figure 2 The right side of FIG. 1 is a cross-sectional view of a ferrite core 131 ′.

[0126] Reference Figure 6 (a) to (b), in Figure 6 (b) shows that in a stylus according to an embodiment of the present invention, the ferrite core 121 may be configured as Figure 6 The ferrite core 131 ′ shown in (a) is closer to the predetermined length S below.

[0127] According to this structure, when using a stylus pen according to an embodiment of the present invention, the inductor portion 120 including the ferrite core 121 can be brought closer to the receiver side (not shown) disposed below the core body 102 of the stylus pen. Therefore, there is an advantage that the size of the pen signal sensed by the receiver side is further increased. This is achieved by reducing the thickness of the buffer component 115 (between the inner side and the outer side) by the shape of the ferrite core 121 of the stylus pen according to an embodiment of the present invention. Figure 7 Detailed description.

[0128] Figure 7 (a) to (c) are used to explain in more detail Figures 4 to 5The figure shows the internal structure and effect of the stylus according to one embodiment of the present invention. Specifically, Figure 7 (a) is related to Figure 6 The same figure as (a), Figure 7 (b) is related to Figure 6 The same figure as (b), Figure 7 (c) is to place the ferrite core 121 in the Figure 7 (a) is a diagram showing the case where the ferrite core 131 ′ is in the same position.

[0129] Reference Figure 7 (a), the buffer component 115' has a certain thickness T2 between the inner side and the outer side. The more the thickness T2 is minimized, the ferrite core 131' can be arranged lower in the tapered portion 101t of the housing 101. However, due to the structure of the buffer component 115' or other manufacturing engineering reasons, the thickness T2 is limited.

[0130] Assuming that the thickness T2 is the minimum thickness that the buffer component 115' can have due to the structure of the buffer component 115' or other manufacturing process reasons, the existing ferrite core 131' is arranged at the bottom of the housing 101. Figure 7 (a).

[0131] Reference Figure 7 (c), the ferrite core 121 is arranged at Figure 7 The ferrite core 131' of (a) is at the same position. Since the ferrite core 121 has a curved surface 121c, the buffer component 115" corresponds to it. Figure 7 The buffer member 115 ′ shown in (a) of FIG. 1 is different in structure. Specifically, the inner side surface of the buffer member 115 ″ has a curved surface that bulges outward corresponding to the curved surface portion 121 c of the ferrite core 121 .

[0132] The thickness between the outer side surface of the buffer component 115" and the inner side surface formed by the curved surface varies depending on the position. Specifically, the upper and lower ends of the inner side surface of the buffer component 115" have a minimum thickness T2 from the outer side surface, and the middle part of the inner side surface of the buffer component 115" has a thickness between T2 and T1 (>T2).

[0133] exist Figure 7 In (c), at least a portion (upper and lower ends) of the buffer component 115" satisfies the minimum thickness T2, and the thickness of the middle portion of the buffer component 115" has a thickness T1 that is greater than the minimum thickness T2. As described above, the thickness T1 of the middle portion of the buffer component 115" is thicker than T2, so it is more convenient to manufacture the buffer component 115". Figure 7The advantage that the existing buffer member 115' in (a) is easier to manufacture.

[0134] Refer to Figure 7 In (b), due to the curved surface portion 121c of the ferrite core 121, the inner side surface of the buffer member 115 is formed as a curved surface. The upper end and the lower end of the inner side surface of the buffer member 115 have a thickness T3 (<T2) with respect to the outer side surface of the buffer member 115, and the middle portion of the inner side surface of the buffer member 115 has a thickness between T3 and T2 with respect to the outer side surface of the buffer member 115.

[0135] In Figure 7 In (b), although the minimum thickness T2 cannot be satisfied at the upper end and the lower end of the buffer member 115, the minimum thickness T2 is satisfied at the middle portion of the buffer member 115. Therefore, the buffer member 115 can be manufactured. Since the buffer member 115 manufactured in this way has a thinner minimum thickness compared to the buffer members 115' and 115'' shown in (a) and (c) of Figure 7 Therefore, the volume of the buffer member 115 can be further reduced. Thus, the buffer member 115 can be arranged closer to the lower part inside the tapered portion 101t of the housing 101. Therefore, the ferrite core 121 can be arranged at a lower predetermined height S compared to Figure 7 (a) of Figure 7 (c).

[0136] Figure 8 It is a diagram for explaining the amount of increase in the size of the pen signal at the predetermined height S shown in (a) to (c) of Figure 7 Refer to the table shown in

[0137] Refer to Figure 8 It can be confirmed from the illustrated table that the larger the predetermined height S is, the larger the size of the pen signal received on the receiver side becomes.

[0138] As described above, Figures 4 to 7 In the stylus 100 according to an embodiment of the present invention shown in the figure, the shape of the tapered portion of the ferrite core 121 of the inductor unit 120 is different from the configuration of the existing ferrite core 131'. Therefore, the thickness of the buffer member 115 can be further reduced, and thus the ferrite core 121 can be arranged closer to the end of the core body 102 inside the housing 101. Therefore, the receiver side that receives the pen signal emitted from the stylus 100 according to an embodiment of the present invention can obtain a larger said pen signal, and thus the sensing sensitivity of the stylus on the receiver side can be improved.

[0139] On the other hand, the receiver mentioned above several times refers to a module or device that receives a pen signal sent from the stylus 100 according to an embodiment of the present invention. The receiver can be a general digitizer or a display panel. The display panel can have at least one annular pattern of a conductive material. The annular pattern can be combined with a touch sensor or can be combined with the touch sensor independently of the display panel.

[0140] The following describes the use of the accompanying drawings Figures 4 to 7 The ferrite core 121 and the buffer component 115 are shown in detail in the internal structure of the stylus pen 100 according to one embodiment of the present invention.

[0141] Fig. 9 yes Figure 3 FIG. 1 is a cross-sectional view of a portion of a stylus pen 100 according to an embodiment of the present invention. Fig.10 (a) is used to illustrate Fig. 9 The structure of the inner shell 110 and the buffer component 115 is shown in the perspective view. Fig.10 (b) is a three-dimensional view of only the inner shell 110, Fig.11 It has been removed Fig.10 (a) is a perspective view of the case where the inner shell 110 is shown. Fig.12 (a) and (b) are observed from multiple sides. Fig. 9 and Fig.11 The three-dimensional view of the first fixing member 130 is shown in FIG. Fig.13 (a) and (b) are observed from multiple sides. Fig. 9 and Fig.11 The illustrated perspective view of the moving part 170, Fig.14 (a) and (b) are observed from multiple sides. Fig. 9 and Fig.11 The third perspective view of the second fixing member 190 is shown in FIG. Fig.15 Observed from one side Fig. 9 and Fig.11 The three-dimensional diagram of the parts shown in the figure, Fig.16 (a) and (b) are Fig. 9 and Fig.11 The illustrated structure is a perspective view of only a portion of the structure.

[0142] Reference Fig. 9The stylus pen 100 includes an internal shell 110, a buffer component 115, an inductor part 120, a capacitor part (not shown), a first fixing component 130, a magnet 140, a cover component 150, a ring terminal 161, contact terminals 165a, 165b, a moving component 170, a first elastic component 180, a second elastic component 185, an elastomer 155, a second fixing component 190 and at least two of the substrate 210.

[0143] The inner housing 110 is made of a non-conductive material and is disposed inside the outer housing 101. Specifically, the inner housing 110 may be disposed inside the first outer housing 101a of the outer housing 101. The inner housing 110 may have a shape that surrounds the inductor portion 120, the first fixing member 130, the ferrite chip 140, the cover member 150, the ring terminal 161, the contact terminals 165a 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 housing 110 may play a role in protecting each structure disposed inside from physical and / or electrical shock.

[0144] Reference Fig. 9 and Fig.10 In (a) and (b), the internal housing 110 may have a first opening 111 configured by the first protrusion 131 of the first fixing member 130 and the first protrusion 192 of the second fixing member 190. The first opening 111 may have a base groove 111b extending in the length 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 length 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. As an example, the first opening 111 may have an 'E' shape.

[0145] The plurality of first protrusions 131 and 192 can be arranged from the plurality of extension grooves 111e to the base groove 111b, or from the base groove 111b to the plurality of extension grooves 111e by rotating the inner housing 110 counterclockwise or clockwise with the core 102 as the rotation axis. In particular, the positions of the first fixing member 130 and the second fixing member 190 inside the inner housing 110 can be fixed by arranging the plurality of first protrusions 131 and 192 from the base groove 111b to the plurality of extension grooves 111e. On the other hand, the moving member 170 is not directly coupled to the inner housing 110, and thus can move in conjunction with the linear reciprocating motion of the core 102 generated by an external force between the first fixing member 130 and the second fixing member 190.

[0146] The inner housing 110 may have a second opening 113 for arranging the extension coils 125a and 125b and exposing the access terminals 165a and 165b. The second opening 113 provides a space for arranging the extension coils 125a and 125b, and can protect the extension coils 125a and 125b from external impact. In addition, the installation position of the access terminals 165a and 165b can be easily confirmed through the second opening 113.

[0147] The buffer component 115 can be disposed between the inductor 120 and the housing 101 and between the core 102 and the inner housing 110. The buffer component 115 has a through hole through which the core 102 passes. Such a buffer component 115 can guide the position of the core 102, stably fix the inductor part 120, and block the electrical or magnetic influence on the inductor part 120 from the outside. Such a buffer component 115 can be formed independently of the inner housing 110, but is not limited thereto, and the buffer component 115 can also be formed integrally with the inner housing 110.

[0148] Reference Fig. 9 and Fig.11 , the buffer component 115, the inductor unit 120, the first fixing component 130, the moving component 170, and the second fixing component 190 may be sequentially arranged from one end of the core 102 to the length direction of the stylus pen 100 (hereinafter referred to as the 'length direction'). That is, along the length direction, the inductor unit 120 may be arranged on the buffer component 115, the first fixing component 130 may be arranged on the inductor unit 120, the moving component 170 may be arranged on the first fixing component 130, and the second fixing component 190 may be arranged on the moving component 170.

[0149] The inductor part 120 includes a ferrite core 121 and a coil part 123 wound on the ferrite core 121. The ferrite core 121 has a through-portion through which the core 102 passes. Through the through-portion, the core 102 can reciprocate linearly along the length direction. The coil part 123 can be at least one layer wound on the ferrite core 123. The two ends of the coil part 123 can be connected to extension coils 125a and 125b, respectively. The extension coils 125a and 125b can extend along the length direction and be connected to the coil electrodes 213a and 213b arranged on the substrate 210, respectively.

[0150] The inductor part 120 is fixed inside the housing 101. The inductor part 120 may be fixed between the first fixing member 130 and the buffer member 115 in the length direction. The inductor part 120 may be fixed by the inner housing 110 in a direction perpendicular to the length direction (hereinafter referred to as 'vertical direction').

[0151] The inductor part 120 may be fixedly disposed on one side of the first fixing member 130 . Part of the inductor part 120 may be disposed in the second cavity 133 b of the first fixing member 130 .

[0152] The inductor unit 120 may be electrically connected to a capacitor unit (not shown) mounted on the substrate 210 to form a resonant circuit unit. The resonant frequency may be set by the inductance L value of the inductor unit 120 and the capacitance C value of the capacitor unit (not shown). The inductance L value of the inductor unit 120 changes with the movement of the magnet 140, so the resonant frequency is variable.

[0153] The capacitor unit (not shown) is disposed on the substrate 210 and has a preset capacitance C value. The capacitor unit (not shown) may include two or more capacitors. At least one of the two or more capacitors is a basic capacitor and may form a loop in a state of being always electrically connected to the inductor unit 120.

[0154] The capacitor part (not shown) includes a jumping capacitor 215. The jumping capacitor 215 is mounted on the substrate 210 and can form a loop electrically connected to the access terminals 165a and 165b. For example, the jumping capacitor 215 can be electrically connected to the access pads 211a and 211b configured on the substrate 210 through the conductive patterns 212a and 212b. The jumping capacitor 215 can be electrically connected to or separated from the basic capacitor as the core 102 moves. When no external force is applied to the core 102, the ring terminal 161 contacts the access terminals 165a and 165b, so the jumping capacitor 215 is electrically connected to the basic capacitor. On the contrary, when an external force is applied to the core 102 so that the moving part 170 linked to the core 12 moves toward the side direction of the first elastic part 180, the ring terminal 161 is separated from the access terminals 165a and 165b, and at this time, the jumping capacitor 215 can be electrically separated from the basic capacitor.

[0155] Reference Fig. 9 , Fig.11 , Fig.12 In (a) and (b), the first fixing member 130 is disposed inside the inner shell 110. The first fixing member 130 has a cylindrical shape as a whole. The first fixing member 130 has a first cavity 133a and a second cavity 133b. Fig. 9 The magnet 140 shown in the figure is arranged in the second cavity 133b Fig. 9 The illustrated inductor 120 is one end of the ferrite core 121. A partition plate 132 is disposed between the first cavity 133a and the second cavity 133b. The partition plate 132 has a through hole 132h through which the core 102 passes.

[0156] The inductor portion 120 is disposed on one side of the first fixing member 130 , and the second fixing member 190 is disposed at a position spaced a predetermined distance from the other side of the first fixing member 130 .

[0157] A plurality of the first protruding portions 131 described above may be disposed on the outer side surface of the first fixing member 130 .

[0158] The outer side surface of the first fixing member 130 may be formed with a plurality of first grooves 135 for respectively disposing the plurality of extensions 171 of the moving member 170. In addition, the outer side surface of the first fixing member 130 may be formed with a plurality of first grooves 135 formed along the length direction so as to be aligned with the plurality of extensions 171 of the moving member 170. Fig.11 The illustrated extension coils 125a and 125b maintain the second slots 137 at a predetermined interval.

[0159] Reference Fig. 9 , Fig.11 , Fig.13 In (a) and (b), the moving member 170 is disposed between the first fixing member 130 and the second fixing member 190. The moving member 170 can be linked with the movement of the core 102 in the longitudinal direction to linearly reciprocate between the first fixing member 130 and the second fixing member 190.

[0160] The moving member 170 is disposed inside the inner housing 110. The moving member 170 has a cylindrical shape as a whole. The moving member 170 has a first cavity 173a and a second cavity 173b. Fig. 9 A portion of the first elastic member 180 is disposed in the second cavity 173b. Fig. 9 A portion of the cover member 150 is shown. A partition plate 172 is disposed between the first cavity 173 a and the second cavity 173 b , and the partition plate 172 is disposed between the cover member 150 and the first elastic member 180 .

[0161] The plurality of extensions 171 disposed in the plurality of first grooves 135 of the first fixing member 130 are disposed on the outer side of the moving member 170. The plurality of extensions 171 have a shape extending along the longitudinal direction and can move along the first grooves 135 of the first fixing member 130.

[0162] The outer side surface of the moving part 170 may be formed with Fig.14 The second extensions 193 of the second fixing member are respectively provided with a plurality of second grooves 175. As the moving member 170 reciprocates linearly along the longitudinal direction, the second grooves 175 also move together, so the positions of the second extensions 193 of the second fixing member 190 provided in the second grooves 175 can be changed.

[0163] The second groove 175 of the moving part 170 may have a shape corresponding to the second extension 193 of the second fixing part 190. The second groove 175 may have a shape that prevents the second extension 193 of the second fixing part 190 from completely escaping from the second groove 175 when the moving part 170 moves away from the second fixing part 190. To this end, the second groove 175 may have a shape in which the width of the second groove 175 becomes narrower as it approaches the side direction of the second fixing part 190, and the second extension 193 of the second fixing part 190 may have a shape that protrudes in the width direction of the second groove 175.

[0164] A first groove 177 may be formed on the outer side of the moving member 170. The first groove 177 is formed in a long shape along the length direction, such as Fig.16 As shown in (b), the access terminals 165a and 165b may be arranged in the first groove 177. The positions of the access terminals 165a and 165b may be fixed and guided by the first groove 177. In addition, the first extension portion 192 of the second fixing member 190 may be arranged in the first groove 177 together with the access terminals 165a and 165b.

[0165] The movable part 175 is arranged between the first fixed part 130 and the second fixed part 190, the extension part 171 of the movable part 170 is arranged in the first groove 135 of the first fixed part 130, and the first extension part 199 and the second extension part 193 of the second fixed part 190 are arranged in the first groove 175 and the second groove 177 of the movable part 170. Therefore, it has the advantage that the movable part 175 will not fall off outward even when it is frequently moved.

[0166] The moving part 170 includes a surface 179 having a first cavity 173a, and the surface 179 may be provided with Fig. 9 and Fig.15 The shape of the one side 179 of the ring terminal 161 shown in the figure may correspond to the shape of the ring terminal 161. The ring terminal 161 disposed on the one side 179 may be guided by the inner side surface of one or more extension portions 171 disposed on the periphery.

[0167] Reference Fig. 9 , Fig.11 and Fig.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 housing 110 .

[0168] The second fixing member 190 includes a cylindrical base 191. One side 191a of the base 191 has a Fig. 9 The cavity 195 is a part of the first elastic member 180 shown in the figure. Fig. 9 The second elastic member 185 is shown.

[0169] The second fixing member 190 includes a first extension portion 199 and a second extension portion 193 extending from a surface 191a of the base 191 toward the side of the moving member 170. A plurality of first extension portions 199 and a second extension portion 193 may be arranged on a surface 191a of the base 191. Specifically, the two first extension portions 199 may be arranged to face each other, and the two second extension portions 193 may be arranged to face each other. The plurality of first extension portions 199 and the second extension portions 193 may guide the moving member 170 from all directions. Fig. 9 The outer side surface of the second elastic member 185 shown in the figure. Therefore, the position of the second elastic member 185 can be fixed by the plurality of first extension portions 199 and the second extension portions 193.

[0170] The inner side surface of the first extension portion 199 guides the outer side surface of the second elastic member 185, and the outer side surface of the first extension portion 199 can support Fig. 9 and Fig.11 The illustrated access terminals 165a, 165b are partially shown.

[0171] The second extension 193 may have a predetermined shape for preventing it from being separated 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 of the extension is convex, thereby preventing it from being separated from the second groove 175.

[0172] The second fixing member 190 may have a groove 194 formed on the outer side of the base 191. The ground of the groove 194 may be connected to the outer side of the first extension portion 199 without any additional step difference. Fig. 9 and Fig.11 The illustrated access terminals 165a, 165b are partially shown.

[0173] The second fixing member 190 may include a mounting portion 196 extending from the other side (not shown) of the base 191 along the length direction. The mounting portion 196 may have Fig. 9 and Fig.11 The illustrated substrate 210 is provided with a cavity 197 .

[0174] The second fixing member 190 may have a Fig. 9 and Fig.11 The illustrated access terminals 165a and 165b are connected to the opening 198 of the substrate 210 disposed in the cavity 197. The other ends of the access terminals 165a and 165b can be disposed in the opening 198 to be connected to the access pads 211a and 211b of the substrate 210.

[0175] Reference Fig. 9 , Fig.11 , Fig.15 , Fig.16 In (a) and (b), the core 102 extends along the length direction to a predetermined length, and one end portion may have a sharp shape. The one end portion is exposed outside the housing 101.

[0176] The core 102 includes a step portion 102T that is a portion of the middle portion disposed between one end and the other end. The thickness of one end and the other end of the middle portion may be different based on the step portion 102T. The first thickness D1 of one end of the middle portion based on the step portion 102T may be formed to be thicker than the second thickness D2 of the other end of the middle portion. With the configuration of such a step portion 102T, the core 102 can move the magnet 140 together when it is moved in the length direction by an external force. That is, when the core 102 moves, the step portion 102T pushes one side of the magnet 140. The magnet 140 can be moved in the length direction. As the magnet 140 moves along the length direction, the spacing distance between the inductor portion 120 and the magnet 140 changes. The change in the 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 100. The stylus sensing device interacting with the stylus 100 can detect the pen pressure (pressure) acting on the core 102 by sensing the change of the resonance frequency.

[0177] The magnet 140 is disposed at Fig.12 The first cavity 133a of the first fixing member 130 shown in the figure has a cylindrical shape. In addition, the magnet 140 has a through hole through which a part of the core 102 passes. The diameter of the through hole can be formed to be greater than or equal to the second thickness D2 and less than the first thickness D1.

[0178] The magnet 140 may be a ferrite chip.

[0179] The magnet 140 can move linearly back and forth along the length direction in conjunction with the core 102. The magnet 140 moves in conjunction with the core 102, so that the inductance L value of the inductor part 120 can change.

[0180] The cover member 150 is disposed at the other end of the core 102. The cover member 150 may have a shape that covers the other end of the core 102. For example, the cover member 150 may have a cylindrical shape with different thicknesses at the upper and lower parts.

[0181] An elastic body 155 may be disposed between the cover member 150 and the magnet 140 . The elastic body 155 may be a spring. One end of the elastic body 155 may be mounted on a part of the cover member 150 , and the other end of the elastic body 155 may abut against the magnet 140 .

[0182] The elastic body 155 may be a member for compensating for the deviation of the magnet 140. For example, when the length or height of the magnet 140 is smaller than the specification by 0.1 mm, the elastic body 155 makes the magnet 140 close to the spacer 132 of the first fixing member 130.

[0183] The ring terminal 161 is a circular shape with a hollow interior, and electrically connects the two access terminals 165a and 165b. The shape of the ring terminal 161 is not limited to a circular shape, and may also have a polygonal shape.

[0184] 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 it linearly reciprocates in the longitudinal direction.

[0185] The access terminals 165a and 165b include one side portion that contacts or separates from the ring terminal 161 and another side portion that is connected to the substrate 210. The one side portion can contact or separate from the ring terminal 161 by the movement of the ring terminal 161 linked to the moving member 170. The other side portion is directly connected to the substrate 210 by welding or the like. Fig. 9 The illustrated substrate 210 has access pads 211 a and 211 b.

[0186] The access terminals 165a and 165b include a base disposed between the one side and the other side. The base may have a shape extending in the length direction. Fig.13 The first groove 177 of the moving member 170 is configured Fig.14 The second fixing member 190 is shown in the figure and can be guided by the first extension portion 199 of the second fixing member 190 .

[0187] The first elastic member 180 is disposed in 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 rubber.

[0188] The first elastic member 180 may be disposed at one end thereof. Fig.14 The cavity 195 of the second fixing member 190 shown in the figure has the other end portion disposed at Fig.13 The moving member 170 is shown with respect to the first cavity 173 a.

[0189] The second elastic member 185 is disposed in 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 rubber. The second elastic member 185 may be made of a relatively harder rubber material than the first elastic member 180. Therefore, the second elastic member 185 is made of a hard rubber material, and the first elastic member 180 may be made of a soft rubber material.

[0190] On the other hand, the second elastic member 185 may also be a spring. The second elastic member 185 may be a spring configured to react to a relatively heavier force than the first elastic member 180 .

[0191] The second elastic member 185 is configured to be thinner in thickness in the longitudinal direction than the first elastic member 180 , and to be wider in diameter in the perpendicular direction than the first elastic member 180 .

[0192] 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.

[0193] like Fig.16 As shown in FIG. 1 (b), the second elastic member 185 may have a groove 185g that is sleeved to a portion of the first extension portion 199 of the second fixing member 190. The second elastic member 185 may thus be stably fixed to the second fixing member 190.

[0194] The following reference Fig.17 Description Figures 9 to 16 The diagram shows the operation of the stylus pen 100 according to one embodiment.

[0195] Fig.17 (a) to (c) are used to illustrate Figures 9 to 16 The diagram of the action of the stylus pen 100 is shown in FIG. Specifically, Fig.17 (a) is a diagram showing a hovering state H of the stylus pen 100, Fig.17 (b) is a diagram showing a contact state C of the stylus pen 100, Fig.17 (c) is a diagram showing the state of the pen pressure P of the stylus pen 100 .

[0196] Reference Fig.17 (a), in the suspended state H, no external force is applied to the core 102, so there is no change in the internal structure. In particular, the ring terminal 161 and the access terminals 165a, 165b remain in contact with each other.

[0197] Reference Fig.17(b), a predetermined pressure is applied to one end of the core 102 in the contact state C. The core 102 moves toward the inner side of the housing 101 by the applied pressure. As the core 102 moves, the cover member 150 pushes the moving member 170 toward the side of the first elastic member 180, and the ring terminal 161 is separated from the access terminals 165a and 165b. Therefore, Fig. 9 The illustrated jump capacitor 215 is electrically disconnected from the base capacitor, and the total capacitance of the capacitor unit (not shown) is reduced. Since the magnet 140 does not move, the inductance of the inductor unit 120 remains unchanged. Since the total capacitance of the capacitor unit (not shown) is reduced, the resonant frequency changes.

[0198] Reference Fig.17 (c), in the pen pressure state P, a greater pressure is applied to one end of the core 102 than in the contact state C. Through the greater pressure, the core 102 moves further toward the inner side of the housing 101, so the magnet 140 is pushed by the step portion 102T of the core 102. As the magnet 140 is pushed, the elastomer 155 arranged between the cover part 150 and the magnet 140 is compressed, and the first elastic part 180 and the second elastic part 185 are compressed by the movement of the moving part 170. Among them, the magnet 140 is away from the inductor part 120, so the inductance L value of the inductor part 120 gradually decreases. Among them, the capacitance of the capacitor part (not shown) remains the same as in the contact state C. The inductance value of the inductor part 120 decreases, so the resonant frequency changes.

[0199] Fig.18 (a) shows an example according to Fig.17 The LC value of the resonant circuit part changes during the operation from (a) to (c), and the Th interval represents Fig.17 (a) The hovering state, Tc point represents Fig.17 (b) The contact state, Tp interval represents Fig.17 (c) The pen pressure state. Fig.18 (b) shows Fig.17 Graphs of frequency characteristics in each operating state from (a) to (c).

[0200] Reference Fig.18 (a), the LC value of the resonant circuit portion composed of the capacitor portion (not shown) and the inductor portion 120 maintains a certain value before the core 102 of the stylus pen 100 contacts the touch surface (Th), and decreases sharply after the core 102 just contacts the touch surface (Tc). In addition, in the interval Tp where the stylus pen 100 is subjected to pen pressure after the stylus pen 100 contacts the touch surface, the LC value of the resonant circuit portion further decreases with the pen pressure. That is, in this interval Tp, as the pen pressure applied to the stylus pen 100 increases, the LC value of the resonant circuit portion can gradually decrease. Refer to Fig.18In (a), the LC value of the resonant circuit part is shown as hovering state>contact state>pen pressure state. In addition, the change amount of the LC value immediately after the core 102 contacts the touch surface is greater than that in the state where the pen pressure gradually increases.

[0201] When the inductance value of the inductor unit 120 and the capacitance value of the capacitor unit (not shown) are changed, the resonant frequency and Q value of the resonant circuit unit can be changed. The smaller the inductance of the resonant circuit unit, the higher the resonant frequency of the resonant circuit unit, and the smaller the inductance, the lower the Q value. Fig.18 As shown in (b), for the frequency characteristics of the resonant signal Vpen output from the resonant circuit part, the larger the moving distance of the core 102, that is, the larger the pen pressure, the higher the resonant frequency can be (hovering state < contact state < pen pressure state), and the smaller the Q value (hovering state > contact state > pen pressure state).

[0202] When the resonant frequency of the resonant circuit changes, the phase of the electromagnetic signal output from the stylus pen 100 changes. Based on this phase change, the stylus pen sensing device interacting with the stylus pen 100 can calculate the change in the LC value of the resonant circuit, and based on this, detect whether the stylus pen 100 is in contact with the stylus pen sensing device and the pen pressure.

[0203] As mentioned above, according to Figures 9 to 16 The stylus pen 100 of the illustrated embodiment changes at least one or both of the inductance and capacitance of the resonance circuit part, so that the stylus pen sensing device can detect the pen pressure. In addition, it has the advantage of being able to detect accurate pen pressure.

[0204] On the other hand, according to Figures 9 to 16 The stylus pen of one embodiment shown in the figure may have assembly deviation during the assembly process. The assembly deviation may cause predetermined problems, as shown below. Figures 19 to 21 Detailed description.

[0205] Fig.19 (a) to (c) are used to illustrate the assembly Figures 9 to 17 The stylus pen 100 shown in the figure is a diagram showing a problem caused by the assembly deviation of the core 102 .

[0206] Specifically, Fig.19 (a) shows the case where the core 102 is normally installed according to the pre-design without assembly deviation. Fig.19 (b) and Fig.19 (c) shows a situation where the core 102 cannot be installed in the pre-designed position due to assembly deviation occurring during the assembly process.

[0207] exist Fig.19In (a), the step portion 102T of the core body 102 is located at the through hole 132h formed in the partition 132 of the first fixing member 130. The position of the step portion 102T is normally assembled without deviation. Fig.19 The assembly deviation in (b) and (c) causes the step portion 102T to be arranged at another position instead of the through hole 132h of the partition plate 132. Specifically, in Fig.19 (b) The middle step difference portion 102T is disposed in the second cavity 133b of the first fixing member 130 disposed in the inductor portion 120 (see Fig.12 (b)), in Fig.19 (c) The middle section difference portion 102T is disposed in the first cavity 133a of the first fixing member 130 disposed with the magnet 140 (refer to Fig.12 (a)).

[0208] Assembly deviation occurs Fig.19 In the case of (b), even if Fig.17 After the contact state (b), pressure is continuously applied to the core 102. Since the distance between the inductor 120 and the magnet 140 remains constant, the inductance value of the inductor 120 does not change immediately. Fig.19 In the case of (c), the magnet 140 passes through the core 102 in Fig.17 The hover state of (a) and Fig.17 The inductor portion 120 moves between the contact states of (b), and thus the inductance value of the inductor portion 120 may change.

[0209] for Fig.19 Each of (a) to (c) of Fig. 20 A change in the resonance frequency according to the pressure applied to the core 102 will be described.

[0210] exist Fig. 20 In the curve diagram, line ① without assembly deviation corresponds to Fig.19 (a), line ② with assembly deviation corresponds to Fig.19 (c), line ③ with assembly deviation corresponds to Fig.19 (b).

[0211] Reference Fig. 20 In the case of line ③, even if the pressure increases after the core 102 just enters the contact state, there is no change in the resonant frequency. The stylus sensing device that interacts with the stylus 100 cannot sense the pen pressure acting on the core 102. In the case of line ②, the resonant frequency still changes when the core 102 is in the hovering state, so the stylus sensing device will recognize that the core 102 is in the contact state rather than the hovering state. As above, Fig.19 The assembly deviations of (b) and (c) may cause the stylus sensing device to have difficulty in accurately sensing the stylus 100 .

[0212] Fig.21 (a) to (c) are used to illustrate the assembly Figures 9 to 17 The illustrated stylus pen 100 is a diagram showing a problem caused by assembly deviation of the terminals 165 a and 165 b when the stylus pen 100 is connected.

[0213] Specifically, Fig.21 (a) shows the case where the access terminals 165a and 165b are installed according to the pre-design without assembly deviation. Fig.21 (b) and Fig.21 (c) shows a diagram in which the access terminals 165a and 165b cannot be installed at the pre-designed positions due to assembly deviation occurring during the assembly process.

[0214] exist Fig.21 In (a), one end 165a1 of the access terminal 165a is in contact with the ring terminal 161, and the other end 165a2 is in contact with the access pad 211a of the substrate 210. The position of the access terminal 165a is assembled normally without deviation. Fig.21 The assembly deviation of the access terminal 165a in (b) and (c) results in the terminal being arranged at a different position than the pre-designed position. Fig.21 In (b), the access terminal 165a is offset toward the substrate 210 by a predetermined distance, so that the one end 165a1 presses the ring terminal 161 with a considerable force. Fig.21 In (c), the access terminal 165 a is offset toward the first fixing member 130 by a predetermined distance, so that the one end portion 165 a 1 is spaced apart from the ring terminal 161 by a predetermined distance.

[0215] Assembly deviation occurs Fig.21 In the case of (b), the access terminal 165a and the ring terminal 161 are assembled in a state of being pressed against each other, so there is a hole for identification. Fig.17 (b) The problem of increased pressure in the contact state. Fig.21 In the case of (c), from Fig.17 In the hovering state (a), the ring terminal 161 and the access terminal 165a are separated, so even if the core 102 is pressed, the stylus sensing device cannot sense it. Fig.17 (b) Contact state.

[0216] the following Figure 22 to Figure 26 Even if a reference occurs Figures 19 to 21 The described assembly deviation has little effect on the performance, and can improve the stylus according to other embodiments by reducing the internal structure to save manufacturing costs.

[0217] and Figures 9 to 17Compared with the stylus pen 100 shown in the figure, Fig. 22 In the stylus pen shown in the figure, 1) the first elastic member 180' is made of a spring instead of a rubber material, and (2) the Figures 9 to 17 The stylus pen 100 shown in the figure has a ring terminal 161, input terminals 165a, 165b, a skip capacitor 215, and electrical connections thereto. Figures 9 to 17 The structures of the stylus pen 100 shown in the figure are the same, so the specific description is replaced by the above description, and the different structures are described in detail below.

[0218] Reference Fig. 22 The first elastic member 180' is composed of a spring. The first elastic member 180' can be configured to be compressed from a low pressure (eg, about 10 gf), and since the compression strength is weak, it can be compressed quickly even if the pressure increases slightly.

[0219] Fig.23 (a) and (b) are used to illustrate Fig. 22 A diagram of the first elastic member 180 ′ is shown. Fig.23 (a) shows the first elastic member 180' when no force is applied thereto. Fig.23 (b) shows that the first elastic member 180' is arranged at Fig. 22 A diagram between the moving component 170 and the second fixed component 190 is shown.

[0220] like Fig.23 As shown in (b), the first elastic component 180' is assembled between the movable component 170 and the second fixed component 190, and can be configured in a partially compressed (or incompletely compressed) state. In this way, when the first elastic component 180' is not subjected to a force greater than a force (or repulsive force) equivalent to the amount of compression by the movable component 170 and the second fixed component 190, the first elastic component 180' is not compressed. The force (or repulsive force) can be, for example, about 10gf. On the contrary, the second elastic component 190 is compressed when it is subjected to a force greater than the force equivalent to the amount of compression through the movable component 170.

[0221] The force (or repulsive force) F of the partially compressed first elastic member 180 ′ is shown in the following .

[0222]

Mathematical formula 1

[0223]

[0224] In the above , G represents the transverse elastic modulus of the spring, Na represents the effective number of windings of the spring, D represents the diameter of the spring, d represents the diameter of the wire, and x represents the length of the spring when it is compressed (in the - direction).

[0225] On the other hand, the first elastic component 180' can also be arranged in an uncompressed state between the movable component 170 and the second fixed component 190. Therefore, the stylus according to another embodiment of the present invention is not limited to being arranged between the movable component 170 and the second fixed component 190 in a partially compressed state of the first elastic component 180'.

[0226] The first resilient member 180 ′ may be configured to react to a relatively greater weight than the resilient body 155 .

[0227] The following reference Fig.24 illustrate Figure 22 to Figure 23 The diagrams illustrate the actions of a stylus according to other embodiments.

[0228] Fig.24 (a) to (c) are used to illustrate Figure 22 to Figure 23 The diagram shows the action of the stylus. Specifically, Fig.24 (a) is a diagram showing a hovering state H of the stylus pen, Fig.24 (b) is a diagram showing a contact state C of the stylus pen, Fig.24 (c) is a diagram showing the pen pressure P state of the stylus pen.

[0229] Reference Fig.24 (a), in the hovering state H, no external force is applied to the core 102, so the internal structure does not change.

[0230] Reference Fig.24 (b), one end of the core 102 is subjected to a predetermined pressure in the contact state C. Due to the applied pressure, the core 102 moves toward the inner side of the housing 101. As the core 102 moves, the cover part 150 pushes the movable part 170 toward the side of the first elastic part 180', so that the movable part 170 is pushed to the second elastic part 185. In this state, the first elastic part 180' is compressed by an amount equivalent to the amount of the movable part 170 being pushed. In addition, as the core 102 moves, the step part 102T of the core 102 pushes the magnet 140 toward the side of the first elastic part 180'. As the magnet 140 is pushed, the distance between the inductor part 120 and the magnet 140 changes, and this change in distance changes the inductance value of the inductor part 120, and ultimately changes the resonant frequency.

[0231] Reference Fig.24(c), in the pen pressure state P, one end of the core 102 is subjected to a greater pressure than that in the contact state C. Due to the greater pressure, the core 102 moves further toward the inner side of the housing 101, so that the magnet 140 is further away from the inductor part 120. As the magnet 140 is pushed, the elastomer 155 arranged between the cover part 150 and the magnet 140 is compressed, and the movement of the moving part 170 causes the first elastic part 180' to be further compressed, and the second elastic part 185 is also compressed. Among them, the magnet 140 is further away from the inductor part 120, so the inductance L value of the inductor part 120 gradually decreases. Since the inductance value of the inductor part 120 decreases, the resonant frequency changes.

[0232] Fig.25 (a) and (b) are diagrams showing examples of assembly deviation of the core 102. Fig.26 Yes Fig.25 Each of (a) and (b) is a graph showing a change in resonance frequency according to pressure applied to the core 102 .

[0233] Fig.25 (a) is a diagram showing that the step portion 102T of the core 102 is offset toward the magnet 140 side due to assembly deviation during the assembly process, and is almost attached to one side of the magnet 140. Fig.25 (b) is a diagram showing that the step portion 102T of the core 102 is displaced toward the inductor portion 120 due to assembly deviation.

[0234] exist Fig.26 In the curve diagram, line ① is the case where no assembly deviation occurs, corresponding to Fig. 22 , line ② corresponds to Fig.25 (a), line ③ corresponds to Fig.25 (b).

[0235] Reference Fig.26 For the stylus according to other embodiments of the present invention including the first elastic member 180 ′, even if the core 102 is slightly misassembled, the performance change is small when compared with the case where there is no misassembly. Fig. 9 The stylus pen 100 shown in the figure is more conducive to mass production.

[0236] in addition, Figure 22 to Figure 24 The stylus shown is not used Figures 9 to 16 The illustrated stylus pen 100 has a skip capacitor 215, annular terminal 161, and input terminals 165a, 165b, and the like, so that the internal structure can be simple, and further, it has the advantage of reducing the manufacturing cost. Fig.14 The groove 194 and the second fixing member 190 shown in the figure Fig.13 A portion of the first slot 177 of the moving member 170 is shown.

[0237] On the other hand, although not shown in the figure, the stylus according to another embodiment of the present invention may be Fig. 9 The first elastic member 180 in the stylus pen 100 shown in the figure is replaced by Fig. 22 and Fig.23 The first elastic member 180' is shown.

[0238] On the other hand, although no additional diagram is used to illustrate, Figure 4 The ferrite core 121 and the buffer component 115 shown in the figure can be used not only Figures 9 to 26 The stylus pen can also be directly used with other existing stylus pens.

[0239] Fig. 27 is based on Figures 4 to 5 The ferrite core 121 is a three-dimensional view of a modified example. Fig.28 (a) is Fig. 27 The enlarged front view of a portion of the ferrite core 121' is shown in FIG. Fig.28 (b) is Fig.28 (a) is a cross-sectional view taken along the line AA'.

[0240] Reference Figure 27 to Figure 28 The ferrite core 121' has a cylindrical shape. A flat surface portion 121d may be disposed on at least a portion of the outer surface of the ferrite core 121'. A flat surface portion corresponding to the flat surface portion 121d may also be disposed on another portion of the outer surface of the ferrite core 121'. The flat surface portion 121d allows the ferrite core 121' to be stably disposed inside the housing.

[0241] 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 surface portions 121c'. The curved surface portion 121c' may be a portion that is bent from the outer surface of the lower end 121b' to a portion adjacent to the through hole 121h of the ferrite core 121'. Such curved surface portions 121c' may be respectively arranged on both sides of the lower end 121b' that are opposite to each other with respect to the through hole 121h.

[0242] Figures 4 to 5 The curved portion 121c of the ferrite core 121 shown in the figure may be arranged on the entire outer surface of the lower end portion 121b', but Figure 27 to Figure 28 The curved portion 121c' of the ferrite core 121' may be disposed on a portion of the outer surface of the lower end portion 121b'.

[0243] The planar portion 121d may be disposed at the upper end portion 121a' and the lower end portion 121b', respectively, and they may be connected to each other to be continuously disposed. The planar portion 121d disposed at the lower end portion 121b' may be disposed between two curved surface portions 121c' disposed opposite to each other on the outer surface of the lower end portion 121b'.

[0244] Figure 27 to Figure 28 The ferrite core 121' shown in the figure can replace the Figures 9 to 26 In this case, the buffer member (not shown) may have a shape capable of covering a portion of the lower end portion 121b' of the ferrite core 121'.

[0245] Fig.29 Is adopted Figure 4 The cross-sectional view of the stylus pen of another modified example of the ferrite core 121 shown in the figure, Fig.30 Only shows Fig.29 The sectional view of the ferrite core 121" and the coil portion 123 shown in the figure, Fig.31 yes Figure 29 to Figure 30 The ferrite core 121" is shown in the figure in a three-dimensional view. Fig.32 (a) is Fig.31 An enlarged front view of a portion of the ferrite core 121" is shown. Fig.32 (b) is to Fig.31 (a) BB' cross-sectional view.

[0246] Reference Figure 29 to Figure 31 According to another modification, the ferrite core 121" includes an upper end portion 121a" and a lower end portion 121b".

[0247] The lower end portion 121 b ″ has a tapered shape, and the outer surface of the lower end portion 121 b ″ includes at least one stepped portion 121 c ″′.

[0248] The step portion 121c" may be disposed on the entire outer surface of the lower end portion 121b", or may be Figure 31 to Figure 32 A part (or parts) disposed outside.

[0249] 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. Among them, although not shown in another figure, the second surface 121c2 may also be a curved surface that bends inward or outward.

[0250] The ferrite core 121" has a cylindrical shape. A planar portion 121d may be configured on at least a portion of the outside of the ferrite core 121". A planar portion corresponding to the planar portion 121d may also be configured on another portion of the outside of the ferrite core 121". Through the planar portion 121d, the ferrite core 121" can be stably configured inside the shell.

[0251] The planar portion 121d can be respectively arranged at the upper end portion 121a" and the lower end portion 121b", and they can be connected to each other for continuous arrangement. Among them, the planar portion 121d arranged at the lower end portion 121b" can be arranged between two step difference portions 121c" arranged opposite to each other on the outside of the lower end portion 121b".

[0252] Figure 29 to Figure 32 The ferrite core 121" shown in the figure includes a step portion 121c", so it can have the same Figures 4 to 5 The ferrite core 121 shown in the figure has almost the same or similar effect.

[0253] Figure 29 to Figure 32 The ferrite core 121" shown in the figure can also be used instead of Figures 9 to 26 In this case, the buffer member (not shown) may have a shape capable of covering a portion of the lower end portion 121 b ″ of the ferrite core 121 ″.

[0254] Fig.33 is a perspective view of a stylus pen 1000 according to another embodiment of the present invention. Fig.34 yes Fig.33 The cross-sectional view of a portion of the stylus pen 1000 is shown in FIG. Fig.35 It has been removed Fig.33 The illustrated embodiment is a perspective view of the housing 1010 of the stylus pen 1000 .

[0255] Reference Figure 33 to Figure 35 The housing 1010 forms the appearance of the stylus pen 1000. A predetermined space is formed inside the housing 1010, and the housing 1010 has a shape that is elongated in one direction. The housing 1010 may be formed of two or more parts combined with each other, or may be formed as one part.

[0256] The housing 1010 may be made of a non-conductive synthetic resin material.

[0257] The housing 1010 may be provided with a button portion 1090. The button portion 1090 may be used to execute a specific action of the stylus pen 1000. For example, the button may be a button for canceling an action or an action of a special function.

[0258] The core 1020 includes an end portion disposed outside the housing 1010, and the rest of the core 1020 except the end portion is disposed inside the housing 1010. The end portion of the core 1020 may also be named as a pen tip.

[0259] The core 1020 may be made of a non-conductive material.

[0260] The core 1020 may include a base 1021 and an outer shell 1025. The base 1021 has a shape that is elongated and extends along the length direction of the stylus pen 1000. The outer shell 1025 surrounds the side of the base 1021. One end of the base 1021 is exposed to the outside instead of being covered by the outer shell 1025. The material of the outer shell 1025 is composed of a material that is relatively harder than the material of the base 1021, and strengthens and protects the base 1021.

[0261] By the external force from the outside, a part of one end of the core 1020 can move into the shell 1010. The larger the external force, the larger the volume of the part of one end of the core 1020 that enters the shell 1010. When the applied external force decreases, the part of one end of the core 1020 extends out of the shell 1010 again. When the external force disappears, the part of one end of the core 1020 returns to the original state.

[0262] The buffer component 1150 is disposed inside the housing 1010, between one end of the ferrite core 1210 and the inner surface of the housing 1010. The buffer component 1150 may be disposed inside the tapered portion 1010t of the housing 1010. The tapered portion 101t0 of the housing 1010 is a portion of the housing 1010 adjacent to one end of the core 1020, and has a shape in which the closer to the end of one end of the housing 1010, the thinner its width or diameter.

[0263] The buffer component 1150 has a conical or polygonal pyramid shape and has a through hole that passes through one end of the ferrite core 1210 and the main body between one end and the other end of the core body 1020. The inner side 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 main body of the core body 1020. The main body of the core body 1020 is a portion of the core body 1020 that is elongated in one direction and is disposed in the through hole of the ferrite core 1210.

[0264] In order to play a buffering role between the ferrite core 1210 and the housing 1010, the buffer component 1150 can be made of an elastic material such as rubber. Such a buffer component 1150 can block external electrical or magnetic influences.

[0265] The buffer member 1150 has a shape surrounding one end portion of the ferrite core 1210 .

[0266] The imaginary tangent line that is tangent to the conical portion 1010t of the housing 1010 and the portion of the core 1020 disposed outside the housing 101 (or the pen tip) can be expressed as follows: Figure 4 The predetermined angle is preferably within 30°. When the predetermined angle is within 30°, the stylus according to other embodiments of the present invention can draw at a state of being inclined at 60° relative to the contact surface.

[0267] The inductor part 1200 may form an LC resonance part with the capacitor part (not shown). The resonance frequency may be set by the inductance L value of the inductor part 1200 and the capacitance C value of the capacitor part (not shown). The resonance frequency may change with the change of the inductance L value of the inductor part 1200 and / or the capacitance C value of the capacitor part (not shown).

[0268] The inductor part 1200 includes a ferrite core 1210 and a coil part 1230 wound around the outer surface of the ferrite core 1210 .

[0269] The ferrite core 1210 may have a cylindrical, elliptical, or polygonal cylindrical shape as a whole, and may be provided with a through portion 1210 h penetrating the interior along the length direction of the ferrite core 1210 .

[0270] The ferrite core 1210 has a through portion 1210h through which the main body of the core 1020 passes. The through portion 1210h allows the main body of the core 1020 to perform linear reciprocating motion along the longitudinal direction.

[0271] One end of the ferrite core 1210 may have a tapered shape in which the diameter or width decreases as it approaches the end portion. Figure 5 As shown in the figure, at least one curved surface portion 121c curved inwardly may be included.

[0272] Ferrite core 1210 such as Figure 5 As shown in the figure, it may include an upper end portion 121a and a lower end portion 121b disposed below the upper end portion 121a. The upper end portion 121a and the lower end portion 121b may be integrally formed.

[0273] The coil part 1230 may be at least one layer wound around the ferrite core 1230 .

[0274] The coil part 1230 is electrically connected to the substrate 2100. The coil part 1230 may include a first connection part 1231 and a second connection part 1232 for connecting to the substrate 2100. The first connection part 1231 is arranged on the fixing bracket 1600, and the end thereof is electrically connected to the first terminal part 2131 of the substrate 2100. The second connection part 1232 is arranged on the fixing bracket 1600, and the end thereof is electrically connected to the second terminal part 2132 of the substrate 2100. Among them, the fixing bracket 1600 may have grooves in which the first connection part 1231 and the second connection part 1232 are respectively arranged. The groove may be formed outside the fixing bracket 1600 along the length direction of the stylus pen 1000. It has the advantages that the first connection part 1231 and the second connection part 1232 of the coil part 1230 can be guided through the groove, and the first connection part 1231 and the second connection part 1232 can be protected from external impact.

[0275] Fig.36 is only Fig.25 The three-dimensional view of the fixing bracket 1600 is shown in FIG. Fig.37 Observe from other directions Fig.36 The three-dimensional view of the fixing bracket 1600 is shown in FIG. Fig.38 Observe from other directions Fig.35 Part of a stereogram.

[0276] Reference Figures 35 to 38 The fixing bracket 1600 is fixedly disposed inside the housing 1010. The fixing bracket 1600 may be disposed inside the housing 1010 between the inductor part 1200 and the substrate bracket 1900. One end of the fixing bracket 1600 is coupled to the inductor part 1200, and the other end of the fixing bracket 1600 may be coupled to the substrate bracket 1900.

[0277] One end portion of the fixing bracket 1600 may include an insertion groove 1620 into which the other end portion of the ferrite core 1210 of the inductor part 1200 is inserted. The insertion groove 1620 may be defined by a first partition plate 1611 of the fixing bracket 1600 and an inner sidewall 1622 .

[0278] The first separator 1611 may be in contact with the other end of the ferrite core 1210 , and the first separator 1611 may have a through hole 1610 through which the core body 1020 passes.

[0279] The inner side wall 1622 may include a plurality of protrusions 1621 protruding into the insertion groove 1620. The plurality of protrusions 1621 contact the outer surface of the other end of the ferrite core 1210, and can play a role in holding the position of the ferrite core 1210.

[0280] The other end of the fixing bracket 1600 may include a hanging hole 1660, 1665 into which the hanging parts 1960, 1965 of the substrate bracket 1900 are inserted. There may be at least one hanging hole 1660, 1665, and as shown in the figure, one may be configured on the upper side and one on the lower side of the fixing bracket 1600. The hanging part 1960 of the substrate bracket 1900 is coupled to the hanging groove 1660, so that the fixing bracket 1600 can be coupled to the substrate bracket 1900.

[0281] 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 length direction of the fixing bracket 1600. The guide protrusion 1667 may be combined with the guide portion 1967 of the substrate bracket 1900. The guide protrusion 1667 is combined with the guide portion 1967 of the substrate bracket 1900, so that the fixing bracket 1660 can be configured along the length direction of the stylus pen 1000.

[0282] The other end of the fixing bracket 1600 may include a second partition plate 1680. The second partition plate 1680 fixes the position of the elastic member 1800 together with the substrate bracket 1900. That is, the elastic member 1800 may be fixedly installed between the second partition plate 1680 and the substrate bracket 1900.

[0283] The fixed bracket 1600 is configured to surround the moving bracket 1300, the elastic body 1700 and the elastic member 1800. The fixed bracket 1600 may have an internal accommodation space 1640 where the moving bracket 1300, the elastic body 1700 and the elastic member 1800 are arranged. In the accommodation space 1640 of the fixed bracket 1600, the moving bracket 1300 may perform linear reciprocating motion.

[0284] The fixing bracket 1600 may include more than two electrode patterns 1690. At least two electrode patterns 1690 may be arranged outside the fixing bracket 1600. For example, the electrode patterns 1690 may be arranged outside the two sides of the fixing bracket 1600 respectively. The electrode pattern 1690 may be plated on the outside of the fixing bracket 1600 of a non-conductive material. For example, the electrode pattern 1690 may be formed on the outside of the non-conductive fixing bracket 1600 by laser direct structuring (LDS) and laser manufacturing antenna (LMA).

[0285] The outer surface of the fixing bracket 1600 may be formed with a groove (or cavity) corresponding to the shape of the electrode pattern 1690. The electrode pattern 1690 may be plated in the groove (or cavity). Although not shown in the figure, as another embodiment, a protrusion corresponding to the shape of the electrode pattern 1690 may be formed on the outer surface of the fixing bracket 1600, and the electrode pattern 1690 may be plated on the protrusion.

[0286] The electrode pattern 1690 may be disposed around the guide groove 1630 of the fixing bracket 1600 and may have a concave-convex shape or a One end of the electrode pattern 1690 may be in contact with or spaced apart from the electrode pattern 1390 of the mobile bracket 1300 , and the other end of the electrode pattern 1690 may be electrically connected to the terminal portions 2191 and 2192 of the substrate 2100 .

[0287] As the movable support 1300 moves in synchronization with the movement of the core 1020, the electrode pattern 1690 may contact the electrode pattern 1390 of the movable support 1300 or may be arranged at a predetermined interval from the electrode pattern 1390 of the movable support 1300. This will be described later with reference to other drawings.

[0288] Fig.39 It has been removed Fig.35 The inductor unit 1200 and the fixing bracket 1600 are shown in the figure. Fig.40 Observe from other directions Fig.39 A stereogram of Fig.41 yes Fig.39 Cross-sectional view of .

[0289] Reference Figure 34 to Figure 39 , the movable bracket 1300 moves synchronously with the core 1020. When one end of the core 1020 is subjected to external force from the outside, the core 1020 moves toward the inside of the housing 1010, and the movable bracket 1300 moves together with the core 1020.

[0290] The moving bracket 1300 is configured to accommodate the other end of the core 1020, the magnet 1400, and the protective member 1500. The moving bracket 1300 may have an accommodating portion accommodating the other end of the core 1020, the magnet 1400, and the protective member 1500.

[0291] Inside the accommodation portion, the magnet 1400 and the protective member 1500 are configured to surround the other end of the core 1020. To this end, the magnet 1400 is cylindrical and may have a through portion inside through which the other end of the core 1020 passes, and the protective member 1500 is cylindrical and may have a through portion inside through which the other end of the core 1020 passes.

[0292] The magnet 1400 includes a magnetic material and moves with the core 1020 in synchronization with the movement of the core 1020. The movement of the magnet 1400 changes the distance from the inductor unit 1200 fixedly disposed inside the housing 1010. The change in distance changes the inductance of the inductor unit 1200.

[0293] The protective component 1500 includes an elastic material and can be assembled between the other end of the core 1020 and the movable bracket 1300. The other end of the core 1020 can be protected by the protective component 1500. Since the protective component 1500 is assembled between the other end of the core 1020 and the movable bracket 1300, the movable bracket 1300 can be synchronized with the movement of the core 1020.

[0294] like Fig.38 As shown, the protective member 1500 may include a protrusion 1510 protruding from the outside to the outside. The protrusion 1510 may be inserted into the insertion groove 1310 formed in the mobile bracket 1300. Through the protrusion 1510 of the protective member 1500 and the insertion groove 1310 of the mobile bracket 1300, the protective member 1500 can be stably fixed to the mobile bracket 1300, so that the other end of the core 1020 can be fixed to the mobile bracket 1300.

[0295] The mobile 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 outside of the mobile bracket 1300 or in a direction perpendicular to the length direction of the stylus pen 1000. The first protrusion 1330a and the second protrusion 1330b may be disposed at Fig.35 The guide hole 1630 of the fixed bracket 1600 is shown in the figure. When the movable bracket 1300 moves synchronously with the movement of the core 1020, the first protrusion 1330a and the second protrusion 1330b can move along the guide hole 1630 of the fixed bracket 1600.

[0296] The mobile bracket 1300 may include a third protrusion 1350. The third protrusion 1350 may protrude outward from the outside of the mobile bracket 1300 or in a direction perpendicular to the length direction of the stylus pen 1000. The third protrusion 1350 may be disposed at Fig.35 The guide hole 1650 of the fixed bracket 1600 is shown in the figure. When the movable bracket 1300 moves synchronously with the movement of the core 1020, the third protrusion 1350 can move along the guide hole 1650 of the fixed bracket 1600.

[0297] The mobile bracket 1300 may include an extension portion 1370. The extension portion 1370 may extend from the outside of the mobile bracket 1300 along the length direction of the stylus pen 1000. Alternatively, the extension portion 1370 may extend from the outside of the mobile bracket 1300 along the length direction of the core 1020. The extension portion 1370 may have a structure and shape that can be configured inside the elastic body 1700. The extension portion 1870 of the elastic member 1800 may be configured on the distal end of the extension portion 1370.

[0298] The moving bracket 1300 may include an electrode pattern 1390. The electrode pattern 1390 may be disposed on an outer surface of the moving bracket 1300 where the extension portion 1370 is formed and on the first and second protrusions 1330a and 1330b.

[0299] The electrode pattern 1390 may be electrically connected by contacting the elastic body 1700 surrounding the extension portion 1370 of the mobile bracket 1300. Fig.35 The electrode pattern 1690 of the fixing bracket 1600 shown in the figure is in contact and electrically connected, and the contact with the electrode pattern 1690 of the fixing bracket 1600 can be released by the movement of the core 1020 to be electrically separated.

[0300] The electrode pattern 1390 may be plated on the outside of the non-conductive material of the mobile support 1300. For example, the electrode pattern 1390 may be formed on the outside of the non-conductive material of the mobile support 1300 by laser direct structuring (LDS) and laser manufacturing antenna (LMA).

[0301] The electrode pattern 1390 may include a basic electrode pattern 1391 , a first extension pattern 1393 a , and a second extension pattern 1393 b .

[0302] The basic electrode pattern 1391 is disposed on the outer surface of the moving bracket 1300 and may be disposed to surround the extension portion 1370 of the moving bracket 1300. The basic electrode pattern 1391 contacts one end of the elastic body 1700.

[0303] The first extension pattern 1393a and the second extension pattern 1393b extend from both sides of the first electrode pattern 1391, respectively. The first extension pattern 1393a is disposed on the first protrusion 1330a, and the second extension pattern 1393b can be disposed on the second protrusion 1330b. Fig.35 The electrode pattern 1690 of the illustrated fixing bracket 1600 is in contact with or released from contact by the movement of the core 1020 .

[0304] The elastic body 1700 is made of a conductive material and may have a spring shape. The elastic body 1700 may be disposed between the mobile bracket 1300 and the elastic component 1800. The elastic body 1700 may be assembled between the mobile bracket 1300 and the elastic component 1800 in a partially compressed state that is not fully compressed. When the external force applied to the mobile bracket 1300 synchronized with the movement of the core 1020 is less than the elastic force of the partially compressed elastic body 1700 pushing outward, the elastic body 1700 is not compressed, and when the external force is greater than the elastic force, the elastic body 1700 begins to be compressed.

[0305] The extension part 1370 of the movable bracket 1300 and the extension part 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, thereby having the advantage of reducing the volume inside the stylus pen 1000 .

[0306] One end of the elastic body 1700 is electrically connected to the electrode pattern 1390 of the mobile 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 connection line 1710 connecting the elastic body 1700 and the terminal portion 2110 of the substrate 2100. The connection line 1710 may be connected to the elastic body 1700 at one end and connected to the terminal portion 2110 of the substrate 2100 at the other end. In order to protect and guide the connection line 1710, the elastic member 1800 and the substrate bracket 1900 may have a guide groove for configuring the connection line 1710.

[0307] 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.

[0308] The elastic member 1800 may be disposed between the moving support 1300 and the substrate support 1900 .

[0309] Fig.42 is only Fig.39 The three-dimensional view of the elastic member 1800 shown in the figure, Fig.43 yes Fig.39 The illustrated diagram is a perspective view of a substrate support 1900 and a substrate 2100 .

[0310] Reference Figure 36 to Figure 43 The elastic member 1800 may include an extension portion 1870. The extension portion 1870 may extend from the outer surface of the elastic member 1800 toward the side of the mobile bracket 1300. The extension portion 1870 may be disposed inside the elastic body 1700.

[0311] The elastic member 1800 may include a guide groove 1810. The guide groove 1810 may be formed on the outside of the elastic member 1800 along the length direction of the stylus pen 1000. The connecting line 1710 of the elastic body 1700 may be disposed in the guide groove 1810.

[0312] The elastic member 1800 may include a mounting groove 1850. The mounting groove 1850 is formed on the outside of the elastic member 1800. The mounting groove 1850 may be disposed on the side opposite to the extension portion 1870. The mounting portion 1910 of the substrate support 1900 may be inserted into the mounting groove 1850. A hanging groove 1851 having a shape corresponding to the protrusion 1915 of the mounting portion 1910 of the substrate support 1900 may be formed inside the mounting groove 1850. The elastic member 1800 can thereby be stably fixedly mounted on the substrate support 1900.

[0313] The substrate support 1900 supports the substrate 2100 inside the housing 1010 , and supports the elastic member 1800 in combination with the elastic member 1800 .

[0314] The substrate supporter 1900 may include a side portion 1940 that guides and supports a side portion of the substrate 2100 .

[0315] The substrate support 1900 may include a mounting portion 1910 for combining with the elastic member 1800. The mounting portion 1910 protrudes from the substrate support 1900 toward the side of the moving support 1300. The mounting portion 1910 may include protrusions 1915 protruding from the outside. The protrusions 1915 may protrude in a direction perpendicular to the protruding direction of the mounting portion 1910.

[0316] The substrate support 1900 may include a guide groove 1920. The guide groove 1920 may guide and protect the connection wire 1710 of the elastic body 1700.

[0317] The substrate 2100 is disposed on the substrate support 1900 .

[0318] The substrate 2100 may include a plurality of terminal portions 2110, 2131, 2132, 2191, 2192. Among the plurality of terminal portions 2110, 2131, 2132, the terminal portion 2110 is electrically connected to the elastic body 1700, and the first terminal portion 2131 and the second terminal portion 2132 are electrically connected to the coil portion 1230 of the inductor portion 1200. The third terminal portion 2191 and the fourth terminal portion 2192 are electrically connected to the electrode patterns 1690 respectively disposed on both sides of the outer surface of the fixing bracket 1600.

[0319] The substrate 2100 includes a capacitor portion (not shown). The capacitor portion (not shown) of the substrate 2100 constitutes one or more capacitor configurations.

[0320] The substrate 2100 may include a circuit pattern that electrically connects one or more capacitors of a capacitor portion (not shown) and a plurality of terminal portions 2110 , 2131 , 2132 .

[0321] Fig.44 Is used to illustrate that Figures 35 to 43 The illustrated diagram shows the movement of the mobile bracket 1300 caused by the movement of the core 1020 and the electrical contact and disconnection between the fixed bracket 1600 and the mobile bracket 1300.

[0322] Fig.44 (A) shows the core 1020 when no external force is applied. Fig.44 (B) shows a state where a predetermined external force is applied to the core 1020 so that the movable bracket 1300 moves in one direction.

[0323] First, refer to Fig.44 (A), when no external force is applied to the core 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.

[0324] The elastic body 1700 pushes the second protrusion 1330 b of the movable bracket 1300 toward the core 1020 , so that the electrode pattern 1390 disposed outside the second protrusion 1330 b can maintain contact with the electrode pattern 1690 of the fixed bracket 1600 .

[0325] Afterwards, refer to Fig.44 (B), when a predetermined external force is applied to the core 1020 and the core 1020 moves in one direction, the movable bracket 1300 and the core 1020 move in the one direction in conjunction. By the movement of the movable bracket 1300 in the one direction, the second protrusion 1330b also moves in the one direction. By the movement of the second protrusion 1330b, the electrode pattern 1390 of the movable bracket 1300 is released from 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, and the electrode pattern 1390 of the movable bracket 1300 is released from the electrode pattern 1690 of the fixed bracket 1600. In addition, the elastic body 1700 is compressed by the movement of the movable bracket 1300.

[0326] like Fig.44As shown in (B), when a predetermined external force is applied to the core 1020 and the core 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. Due to the release of the contact, the capacitance of the capacitor part (not shown) mounted on the substrate 2100 changes. The change in capacitance changes the frequency of the pen signal emitted from the stylus 1000. The receiving side that receives the pen signal senses the changed frequency to determine that the stylus 1000 has contacted the screen.

[0327] As the movable bracket 1300 moves, the magnet 1400 disposed inside the movable bracket 1300 also moves together. As the magnet 1400 moves, the distance between the inductor part 1200 and the magnet 1400 increases. By changing the distance between the inductor part 1200 and the magnet 1400, the inductance of the inductor part (not shown) changes. The change in inductance occurs together with the change in capacitance described above. Among them, it can be configured so that the change in capacitance changes more dominantly than the change in inductance. It is easier to change capacitance sharply than to change inductance sharply in the limited space inside the housing of the stylus. On the other hand, depending on the situation, it can also be configured so that the change in inductance changes more dominantly than the change in capacitance. Alternatively, it can also be configured so that the change in capacitance and the change in inductance have almost the same appearance. Regardless of which of the above three cases is the case, the capacitance and inductance change together through the movement of the movable bracket 1300, and the change in capacitance and inductance leads to a change in the resonant frequency of the resonant circuit formed by the inductor part 1200 and the capacitor part. The receiving side receiving the pen signal can determine that the stylus pen 1000 has contacted the screen by sensing the change in the resonance frequency.

[0328] Fig.45 Picture shows Fig.44 Each of (A) and (B), Fig.46 The stylus according to other embodiments of the present invention is simplified. Fig.44 Each of (A) and (B) is constituted as an equivalent circuit diagram.

[0329] Reference Fig.45 and Fig.46 (A) and (B), a plurality of capacitors C1, C2, C3, Cs are arranged on the substrate 2100. The plurality of capacitors C1, C2, C3, Cs can constitute a capacitor unit (not shown). At least one of the plurality of capacitors C1, C2, C3, Cs is connected in parallel to maintain a certain capacitance value. Fig.44The electrode pattern 1690 of the fixed support 1600 shown in the figure is in contact or disconnected with the electrode pattern 1390 of the movable support 1300, and the auxiliary capacitor Cs is connected in parallel with the basic capacitor or is not connected with the basic capacitor.

[0330] First, if Fig.45 (A) and Fig.46 As shown in (A), 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 the auxiliary capacitor Cs is connected in parallel with the basic capacitors C1, C2, and C3. Therefore, the capacitance of the capacitor part (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.

[0331] Afterwards, if Fig.45 (B) and Fig.46 As shown in (B), when a predetermined external force is applied to the core 1020, the electrode pattern 1390 of the movable bracket 1300 is released from the electrode pattern 1690 of the fixed bracket 1600 by the movement of the movable bracket 1300 synchronized with the movement of the core 1020. Therefore, the auxiliary capacitor Cs cannot be electrically connected to the basic capacitors C1, C2, and C3, and the capacitance of the capacitor part (not shown) is changed to the capacitance value of the basic capacitors C1, C2, and C3.

[0332] In particular, refer to Fig.46 (b), it can be confirmed that the electrode pattern 1390 of the movable support 1300 and the electrode pattern 1690 of the fixed support 1600 are in contact at two portions. Fig.39 and Fig.40 As shown in the figure, it can be understood that the fixed bracket 1600 has two electrode patterns 1690, and the first protrusion 1330a and the second protrusion 1330b of the movable bracket 1300 are configured with a first extension pattern 1393a and a second extension pattern 1393b.

[0333] When the external force applied to the core 1020 does not reach the extent of separating the first extension pattern 1393a and the second extension pattern 1393b from the two electrode patterns 1690 of the fixed bracket 1600, that is, when the first extension pattern 1393a is separated from one electrode pattern 1690 of the fixed bracket 1600, but the second extension pattern 1393b is not separated from the other electrode pattern 1690 of the fixed bracket 1600, the auxiliary capacitor Cs still remains connected in parallel with the basic capacitors C1, C2, and C3.

[0334] On the contrary, as long as the external force applied to the core 1020 reaches the extent that the first extension pattern 1393a and the second extension pattern 1393b are completely separated from the two electrode patterns 1690 of the fixing bracket 1600, the auxiliary capacitor Cs is disconnected from the electrical connection with the basic capacitors C1, C2, and C3. Therefore, when using the stylus pen 1000 according to other embodiments of the present invention, since a reference pressure for distinguishing between hovering and contact is clearly set, there is an advantage that the distinction between hovering and contact is clear. In particular, even if any one of the first extension pattern 1393a and the second extension pattern 1393b does not contact any one of the two electrode patterns 1690 of the fixing bracket 1600 due to a problem in the manufacturing process when manufacturing the stylus pen or the user does not pay attention to the use, the other extension pattern and the other electrode pattern in the stylus pen 1000 according to other embodiments of the present invention can still maintain a contact state, so there is an advantage that the hovering state and the contact state can be clearly distinguished.

[0335] Fig.47 is observed from the side of the core 1020 according to Fig.33 The illustrated perspective view of a stylus pen 1000 according to another embodiment of the present invention is Fig.48 (A) is cut at A-A' Fig.47 The illustrated stylus pen 1000 is a portion of a cross-sectional view. Fig.48 (B) is cut at B-B' Fig.47 The illustrated stylus pen 1000 is a portion of a cross-sectional view. Fig.49 It is shown Figure 47 to Figure 48 The ferrite core 1210 is shown in side view A, B and cross-sectional view.

[0336] Reference Fig.35 , Figure 47 to Figure 49 The housing 1010 of the stylus pen 1000 has a rectangular tube shape with rounded corners, and a portion of the housing 1010 that exposes a portion of the core 1020 has a shape in which the width becomes narrower toward the outer side.

[0337] According to the outer shape of the housing 1010, the components arranged inside also correspond to the shape of the housing 1010. In the internal structure, the ferrite core 1210 of the inductor part 1200 also has an optimized structure corresponding to the outer shape of the housing 1010.

[0338] like Fig.48 As shown in (A) and (B), the ferrite core 1210 is perpendicular to the axial direction (x, or the length direction of the stylus pen 1000) of the ferrite core 1210 in the first vertical direction ( Fig.47The first cross-sectional shape cut along the A-A' direction) is different from the first cross-sectional shape cut along the second perpendicular direction ( Fig.47 Specifically, the thickness w1 of the ferrite core 120 in the first perpendicular direction is different from the thickness w2 in the second direction. More specifically, the thickness w1 in the first perpendicular direction is smaller than the thickness w2 in the second direction. The thickness w1 in the first perpendicular direction may be defined as the shortest distance from the through hole 1210h of the ferrite core 1210 to the outside of the ferrite core 1210 in the first perpendicular direction, and the thickness w2 in the second perpendicular direction may be defined as the shortest distance from the through hole 1210h of the ferrite core 1210 to the outside of the ferrite core 1210 in the second perpendicular direction. Alternatively, unlike what is shown in the drawings, the thickness w1 in the first perpendicular direction may be the total thickness of the ferrite core 1210 in the first perpendicular direction, and the thickness w2 in the second perpendicular direction may be the total thickness of the ferrite core 1210 in the second perpendicular direction.

[0339] The ferrite core 1210 has a tube or cylindrical shape. A plane portion 1210d may be configured on at least a portion of the outer surface of the ferrite core 1210. A plane portion corresponding to the plane portion 1210d may also be configured on another portion of the outer surface of the ferrite core 1210. The ferrite core 1210 can be stably configured inside the housing 1010 through the plane portion 1210d. The plane portion 1210d is formed to extend from one end of the ferrite core 1210 to the other end along the axial direction x of the ferrite core 1210.

[0340] One end of the ferrite core 1210 may include at least two curved surface portions 1210c. Fig.48 The curved portion 1210c may appear in the second cross-sectional shape but not in the first cross-sectional shape. The curved portion 1210c may be a curved surface that curves toward the through hole 1210h side from one side of one end of the ferrite core 1210 to a portion adjacent to the through hole 1210h of the ferrite core 1210. Such a curved portion 1210c may be arranged on two sides opposite to each other at one end of the ferrite core 1210 with the through hole 1210h as a reference.

[0341] The curved surface 1210c is as follows Fig.49 As shown in the ①②③ diagrams, the closer to the axial direction x of the ferrite core 1210, the more the aspherical shape changes into a spherical shape. Fig.49 ③ shows that the curved surface portion 1210c is an aspherical shape. Fig.49 ① shows that the curved surface portion 1210c is spherical. And, Fig.49② shows that the curved surface portion 1210c is an intermediate shape between an aspherical shape and a spherical shape.

[0342] At one end of the ferrite core 1210, the plane portion 1210d has a shape in which the width thereof becomes narrower as it approaches the axial direction x of the ferrite core 1210. The width of the plane portion 1210d may decrease nonlinearly.

[0343] When using the ferrite core 1210, as described above Figures 6 to 8 As described above, the inductor part 1200 including the ferrite core 1210 can be arranged inside the stylus pen 1000 closer to the tip of the core body 1020. Therefore, since the inductor part 1200 can be relatively closer to the receiver side (not shown), there is an advantage that the size of the pen signal received from the receiver side is further increased.

[0344] on the other hand, Figure 47 to Figure 49 The ferrite core 1210 shown in the figure can be applied to Figure 3 or Fig. 22 Further, Figure 3 or Fig. 22 The ferrite core of the stylus shown in the figure can also be used for Fig.33 stylus.

[0345] Fig.50 It is used to illustrate Fig.49 The diagram of a modified example of the ferrite core 1210 is shown in FIG. Fig.51 yes Fig.50 The illustrated diagram is a perspective view of an inductor unit 1200 ′ in which a coil 1230 ′ is wound around the outer surface of a ferrite core 1210 ′.

[0346] Reference Fig.50 , the ferrite core 1210 ′ has a cylindrical shape.

[0347] One end of the ferrite core 1210' may include a curved surface portion 1210c'. The curved surface portion 1210c' may be a curved surface that curves toward the through hole 1210h from the one end of the ferrite core 1210' to a portion adjacent to the through hole 1210h of the ferrite core 1210'.

[0348] The ferrite core 1210' has a through hole 1210h penetrating along the axial direction x. The through hole 1210h may have a constant diameter from one end to the other end.

[0349] like Fig.50 As shown in the ①②③ diagrams, the closer the curved portion 1210c' is to the axial direction x of the ferrite core 1210', the smaller the outer diameter is, and the inner diameter is constant. The inner diameter defines the through hole 1210h. Or, Fig.50As shown in the ①②③ diagrams, the closer the curved portion 1210c' is to the axial direction x of the ferrite core 1210', the smaller the thickness between the outer diameter and the inner diameter.

[0350] The reduction rate of the outer diameter along the axial direction x of the ferrite core 1210' or the thickness (between the outer diameter and the inner diameter) can be nonlinear. More specifically, when one end of the ferrite core 1210' is divided into an upper end (the portion where ③ is located), a middle end (the portion where ② is located), and a lower end (the portion where ① is located), the reduction rate of the outer diameter or the thickness from the upper end to the middle end can be relatively greater than the reduction rate of the outer diameter or the thickness from the middle end to the lower end. In other words, there can be a relatively sharp reduction rate from the upper end to the middle end, and a relatively slow decrease rate from the middle end to the lower end.

[0351] Reference Fig.51 The coil 1230' may be wound around the outside (or outer peripheral surface) of the ferrite core 1210'.

[0352] The inductor unit 1200' including the ferrite core 1210' and the coil 1230' may be disposed in a cylindrical housing (not shown) instead of Fig.47 The interior of the housing 1000 is shown. Although not shown separately, the ferrite core of the inductor portion may have a shape corresponding to the interior shape of the housing.

[0353] The features, structures, effects, etc. described in the above embodiments are included in one embodiment of the present invention and are not limited to only one embodiment. In addition, a person skilled in the art in the field to which the embodiments belong may also combine the features, structures, effects, etc. exemplified in each embodiment with other embodiments or variations for implementation. Therefore, it should be interpreted that the contents related to these combinations and variations are included in the scope of the present invention.

[0354] In addition, although the above description is centered on the implementation mode, this is only an example and does not limit the present invention. A person skilled in the art of the present invention will know that various modifications and applications not illustrated above can be implemented within the scope of the essential characteristics of the present implementation mode. For example, each component specifically shown in the implementation mode can be implemented in a deformed manner. And it should be interpreted that the differences related to such modifications and applications are included in the scope of the present invention specified in the scope of the attached claims.

Claims

1. A ferrite core, which is installed inside a stylus pen and has a through hole formed along the length direction of the stylus pen, wherein: The ferrite core has a first cross-sectional shape in a first perpendicular direction perpendicular to the longitudinal direction, and a second cross-sectional shape in a second perpendicular direction perpendicular to the longitudinal direction and the first perpendicular direction. the first cross-sectional shape is different from the second cross-sectional shape, The ferrite core includes a curved portion disposed at one end of the ferrite core. The curved surface portion includes at least two or more curved surfaces that curve toward the through-hole side from one side surface of one end portion of the ferrite core to a portion adjacent to the through-hole of the ferrite core.

2. The ferrite core according to claim 1, wherein: In the first cross-sectional shape, the thickness of the ferrite core in the first perpendicular direction is smaller than the thickness of the ferrite core in the second direction in the second cross-sectional shape, At least a portion of the curved surface portion appears only in the second cross-sectional shape.

3. The ferrite core according to claim 1, wherein: The curved surface portion is configured to change from an aspherical shape to a spherical shape as it moves from the other end portion of the ferrite core toward the one end portion.

4. The ferrite core according to claim 1, wherein: The ferrite core includes a planar portion, the planar portion is disposed on a portion of the outer surface of the ferrite core and is formed between two ends of the ferrite core along the length direction. At one end portion of the ferrite core, the planar portion is configured such that a width of the planar portion becomes narrower as it approaches a distal end direction of the ferrite core.

5. A touch pen, comprising: shell; The core is configured such that one end is disposed outside the shell and the rest is disposed inside the shell, and moves along the length direction by an external force acting on the one end; an inductor portion, arranged inside the housing, comprising a ferrite core having a through hole through which the core body passes, and a coil wound around the outside of the ferrite core; A fixing bracket, fixedly disposed inside the housing and combined with the other end of the ferrite core; and The movable bracket is arranged inside the fixed bracket, is configured to surround the other end of the core body, and is linked with the core body to synchronize with the movement of the core body. The ferrite core has a first cross-sectional shape in a first perpendicular direction perpendicular to the longitudinal direction, and a second cross-sectional shape in a second perpendicular direction perpendicular to the longitudinal direction and the first perpendicular direction. the first cross-sectional shape is different from the second cross-sectional shape, The ferrite core includes a curved portion disposed at one end of the ferrite core. The curved surface portion includes at least two or more curved surfaces that curve toward the through-hole side from one side surface of one end portion of the ferrite core to a portion adjacent to the through-hole of the ferrite core.

6. The stylus pen according to claim 5, wherein: Also includes: The magnet is arranged inside the movable bracket, surrounds the other end of the core, and moves together with the movable bracket.

7. The stylus pen according to claim 6, wherein: Also includes: The protection component is arranged inside the movable bracket, surrounds the other end of the core together with the magnet, and presses the core between the core and the movable bracket.

8. The stylus pen according to claim 5, wherein: include: A substrate support, fixedly disposed inside the housing and combined with the other end of the fixed support; and The substrate is provided with a capacitor portion that forms a resonance circuit with the inductor portion, and is mounted on the substrate holder.

9. The stylus pen according to claim 8, wherein: include: An elastic component, arranged inside the fixing bracket and mounted on the substrate bracket; and an elastic body, arranged inside the fixed bracket and between the movable bracket and the elastic component, The elastic body has an empty space inside. At least a portion of the movable bracket and at least a portion of the elastic member are in contact with each other and are arranged in the empty space of the elastic body.

10. The stylus pen according to claim 9, wherein: The fixing bracket includes a pair of electrode patterns arranged outside and facing each other; The moving bracket includes an electrode pattern that contacts or is separated from the pair of electrode patterns as the core moves, The elastic body is a conductive material. One end of the elastic body is connected to the electrode pattern of the movable bracket, The other end of the elastic body is connected to the first terminal of the substrate, A pair of electrode patterns of the fixing bracket are respectively connected to the second terminal and the third terminal of the substrate.

11. The stylus pen according to claim 10, wherein: The capacitor unit includes at least one capacitor and an auxiliary capacitor connected in parallel to one end of the capacitor. The first terminal is connected in series with the auxiliary capacitor, The second terminal and the third terminal are connected in parallel to the other end of the capacitor.

12. The stylus pen according to claim 10, wherein: A pair of electrode patterns of the fixing bracket are plated in grooves formed on the outer surface of the fixing bracket, The electrode pattern of the moving bracket is plated on a groove formed on the outer surface of the moving bracket.

13. The stylus pen according to claim 8, wherein: As the moving bracket moves in sync with the movement of the core, the resonant frequency of the resonant circuit changes.

14. The stylus pen according to claim 13, wherein: At a time point when the hovering state and the contact state of the stylus pen are distinguished, the capacitance of the capacitor portion changes more dominantly than the inductance of the inductor portion.

15. The stylus pen according to claim 5, wherein: The thickness of the ferrite core in the first cross-sectional shape in the first perpendicular direction is smaller than the thickness of the ferrite core in the second cross-sectional shape in the second direction. At least a portion of the curved surface portion appears only in the second cross-sectional shape.

16. The stylus pen according to claim 5, wherein: The curved surface portion of the ferrite core is configured to change from a non-spherical shape to a spherical shape as it moves from the other end portion of the ferrite core toward the one end portion.

17. The stylus pen according to claim 5, wherein: The ferrite core includes a planar portion, the planar portion is disposed on a portion of the outer surface of the ferrite core and is formed between two ends of the ferrite core along the length direction. At one end portion of the ferrite core, the planar portion is configured such that a width of the planar portion becomes narrower as it approaches a distal end direction of the ferrite core.

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