Electronic pen

Abstract

An electronic pen capable of ensuring waterproofness and dustproofness even if an opening portion of a housing into which a core is inserted is exposed to the outside. Provided are: a housing; an opening portion formed in one side of the housing; a core protruding to the outside of the housing through the opening portion; a pen pressure detection portion detecting a pen pressure applied to the core in operation; and a core insertion member provided in the housing and having a hollow space accommodating the core, the hollow space including a hollow portion between the core insertion member and the core when the core insertion member accommodates the core, the hollow portion communicating with a first space outside the electronic pen via the opening portion, and the hollow portion being separated from a second space in which the pen pressure detection portion is provided.

Description

[0001] The present application is a divisional application of the application with the title of "Electronic Pen" filed on June 29, 2017, and application number 201710514295.8. TECHNICAL FIELD

[0002] The present application relates to an electronic pen used with a position detection device and having a function of detecting a pen pressure. BACKGROUND

[0003] In recent years, as an input device of a tablet or a personal computer, etc. which is portable, an input device configured of an electronic pen (stylus) which constitutes a position pointer and a position detection device which has an input surface which receives an indication operation or a character and a figure input by the electronic pen has been utilized.

[0004] As the electronic pen, there are electronic pens of various types such as an electromagnetic induction type or an electrostatic coupling type, and generally, the electronic pen is configured to have a function of detecting a pen pressure. In such an electronic pen, an opening portion is provided on one side in an axial direction of a housing of the electronic pen, a tip of a rod-shaped core body protrudes from the opening portion, and in order to be able to transmit a pen pressure applied to the core body to a pen pressure detection portion provided inside the housing, a structure is provided which has a space in which the core body is able to move in the axial direction.

[0005] In addition, in recent years, the use scenario of a tablet or the like in an outdoor environment has increased. However, in the case of an electronic pen in which an opening portion is provided in a housing in order to protrude a tip of a core body to the outside and which has a function of detecting a pen pressure as described above, in order to be able to move the core body in the axial direction, a structure is provided which has a space which communicates with the opening portion. Therefore, water or dust or the like intrudes into the housing from the opening portion and the space, and has an influence on an electrical component or a connection portion housed in the housing of the electronic pen, and there is a concern that this becomes a cause of a malfunction of the electronic pen.

[0006] Therefore, in recent years, there is a demand for waterproofness and dustproofness of an electronic pen, and various proposals have been made from the past. For example, in Patent Literature 1 (Japanese Patent Application Publication No. 2010-198193), a structure is disclosed in which, for example, a rubber cap of a conical shape in which a through hole which closely fits the core body is formed on a top portion is capped so as to cover an opening portion of a housing of an electronic pen. In this structure, the core body is installed in a state in which the tip protrudes through the through hole of the rubber cap.

[0007] According to this structure, the opening portion of the housing is covered by the rubber cap and does not protrude to the outside, and in addition, a gap does not occur between the core body and the rubber cap by the close fit of the through hole and the side peripheral surface portion of the core body, so it is possible to ensure waterproofness and dustproofness.

[0008] PRIOR ART DOCUMENTS

[0009] PATENT LITERATURE

[0010] Patent Literature 1: Japanese Patent Application Laid-Open (kokai) No. 2010-198193 SUMMARY

[0011] PROBLEMS TO BE SOLVED BY THE INVENTION

[0012] However, in the case of Patent Literature 1, since the rubber cap is capped to the opening portion side of the electronic pen so as not to expose the opening portion of the housing of the electronic pen to the outside, there is a concern that the rubber cap itself is exposed to the outside. Further, since the rubber cap of Patent Literature 1 has a through hole in the top portion, if the adhesion of the portion of the through hole and the core is reduced, there is a concern that the effects of waterproofness and dustproofness are reduced. Especially, in the structure of Patent Literature 1, since the contact portion of the through hole of the top portion and the core elastically displaces according to the movement of the core in the axial direction corresponding to the application of the pen pressure, there is a concern that the adhesion of the through hole of the top portion to the core easily deteriorates due to aging, and the effects of waterproofness and dustproofness are reduced.

[0013] An object of the present application is to solve the above problems, and to provide an electronic pen capable of ensuring waterproofness and dustproofness.

[0014] MEANS FOR SOLVING THE PROBLEMS

[0015] In order to solve the above problems, the present application provides an electronic pen characterized by comprising:

[0016] a cylindrical housing;

[0017] a core in a stick shape provided to project to the outside from a housing opening portion formed on one side in the axial direction of the housing;

[0018] a pen pressure detection portion disposed in the hollow portion of the housing to detect a pen pressure applied to the core;

[0019] a core insertion member disposed between the pen pressure detection portion and the housing opening portion in the hollow portion of the housing to house the core in a manner capable of moving in the axial direction of the housing, and having a hollow space on the side of the pen pressure detection portion which is occluded by a barrier layer configured to elastically displace in the axial direction; and

[0020] a first sealing member for separating the hollow space of the core insertion member and the space of the hollow portion of the housing,

[0021] based on the core moving in the hollow space of the core insertion member in the axial direction according to the pen pressure, the barrier layer of the core insertion member elastically displaces, whereby the pen pressure applied to the core is transmitted to the pen pressure detection portion.

[0022] In the above-described structure of the application, in the hollow portion of the housing, a core insertion member is provided between the pen pressure detection portion and the housing opening portion, in which the core is housed so as to be movable in the axial direction of the housing, and the pen pressure detection portion side (the side opposite to the core insertion opening side) has a hollow space closed by a barrier layer configured to be elastically displaced in the axial direction.

[0023] Further, the hollow space of the core insertion member and the space of the hollow portion of the housing are separated by the first sealing member. That is, the hollow space of the core insertion member becomes a space communicating with the outside of the electronic pen, but is closed by the barrier layer, and becomes a space different from the space of the hollow portion of the housing.

[0024] Therefore, even if the opening portion of the hollow space of the core insertion member (core insertion opening) through which the core passes is exposed to the outside, the hollow space of the core insertion member can be separated from the space of the hollow portion of the housing in which the electronic component or the electrical connection portion is provided, and waterproofness and dustproofness can be ensured.

[0025] Further, in the electronic pen of the application, the core is structured so as to be freely movable in the axial direction in the hollow space of the core insertion member closed by the barrier layer according to the pen pressure applied, and the barrier layer is elastically displaced according to the movement in the axial direction corresponding to the pen pressure, thereby transmitting the pen pressure to the pen pressure detection portion. Therefore, there is no member such as the rubber cap in the case of the above-described Patent Document 1 that is tightly fitted to the portion of the core passing through the through hole and elastically displaced according to the movement of the core in the axial direction, and the ability against aging is also strong enough, and waterproofness and dustproofness can be ensured.

[0026] Effects of the Invention

[0027] According to the application, an electronic pen in which there is no member such as the rubber cap that is tightly fitted to the portion of the core passing through the through hole and elastically displaced according to the movement of the core in the axial direction, and the ability against aging is also strong enough, and waterproofness and dustproofness can be ensured can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a diagram for explaining an example of an electronic device using an embodiment of the electronic pen of the application.

[0029] Figure 2 is an exploded perspective view for explaining an internal structure example of an embodiment of the electronic pen of the application.

[0030] Figure 3 is an exploded perspective view for explaining a structure example of a pen pressure detection module in an embodiment of the electronic pen of the application.

[0031] Figure 4 Fig. 1 is a diagram for explaining a component group of a pressure-sensitive portion used in a pen pressure detection module in an embodiment of the electronic pen of the present application.

[0032] Figure 5 Fig. 2 is a diagram for explaining a main part in an internal structure example of the embodiment of the electronic pen of the present application.

[0033] Figure 6 Fig. 3 is a diagram for explaining a main part in an internal structure example of the embodiment of the electronic pen of the present application.

[0034] Figure 7 Fig. 4 is a diagram for explaining a main part in an internal structure example of the embodiment of the electronic pen of the present application.

[0035] Figure 8 Fig. 5 is a diagram for explaining a main part in an internal structure example of the embodiment of the electronic pen of the present application.

[0036] Figure 9 Fig. 6 is a diagram for explaining a main part in an internal structure example of the embodiment of the electronic pen of the present application.

[0037] Figure 10 Fig. 7 is a diagram showing a circuit structure example of a position detection device used with the embodiment of the electronic pen of the present application.

[0038] Figure 11 Fig. 8 is a diagram for explaining a structure example of another embodiment of the electronic pen of the present application.

[0039] Figure 12 Fig. 9 is a diagram showing a circuit structure example of a position detection device used with another embodiment of the electronic pen of the present application. DETAILED DESCRIPTION

[0040] Hereinafter, an embodiment of the electronic pen of the present application will be explained with reference to the drawings. The electronic pen of the embodiment explained below is a case where the electronic pen of the embodiment transmits a position-indicating type to a position detection device by an electromagnetic induction system.

[0041] Figure 1 Fig. 1 is a diagram showing an example of an electronic device 200 using the electronic pen 1 of the embodiment. In this example, the electronic device 200 is a high-function portable telephone terminal, for example, provided with a display device such as an LCD (Liquid Crystal Display) and a display screen 200D, and is provided with a position detection device 202 of the electromagnetic induction system in the lower portion (back side) of the display screen 200D.

[0042] In this example, the housing of the electronic device 200 has a receiving recess 201 for accommodating the electronic pen 1. The user can remove the electronic pen 1 from the electronic device 200 as needed, and use the display screen 200D as an input surface for position indication operations.

[0043] In the electronic device 200, if the electronic pen 1 performs a position indication operation on the display screen 200D, the position detection device 202 provided on the back side of the display screen 200D detects the position operated by the electronic pen 1 and the pen pressure. The microcomputer of the position detection device 202 of the electronic device 200 performs display processing corresponding to the operation position and pen pressure on the display screen 200D.

[0044] In the electronic pen 1 of this embodiment, multiple components of the electronic pen 1 are arranged and housed within the hollow portion of a cylindrical outer shell (housing) 2 made of, for example, resin, along the axial direction. Furthermore, one end of the cylindrical outer shell is tapered, and an opening is provided at its end. Figure 1 (Illustrations omitted in the text) Through this opening, the front end 32 of the rod-shaped core 3, described later, is exposed as a pen tip. Furthermore, on the side of the outer casing 2 opposite to the pen tip side, the outer casing cap 21 is fitted to ensure that it is sealed in a way that takes into account waterproofing and dustproofing.

[0045] Furthermore, in this example, the electronic pen 1 has a structure with a side switch. That is, a printed circuit board is provided in the hollow part inside the housing 2, as described later, and the side switch is placed on the printed circuit board. Moreover, a through hole (…) is passed through the side of the housing 2 of the electronic pen 1 at a position corresponding to the side switch. Figure 2 (Illustration omitted), in this through-hole portion, the pressing operation element 22 for the side switch is exposed through the through-hole so that the side switch placed on the printed circuit board can be pressed. At this time, the pressing operation of the side switch performed by the pressing operation element 22 is assigned a predetermined function on the electronic device 200 equipped with the position detection device 202. For example, in this example of the electronic device 200, the pressing operation of the side switch performed by the pressing operation element 22 can be assigned as the same operation as the click operation in a pointing device such as a mouse.

[0046] Figure 2 This is an exploded perspective view showing the components housed within the outer casing 2 of the electronic pen 1, arranged by each component. In this embodiment, the external shape (equal to the outline shape of the cross-section of the outer casing 2) in the direction orthogonal to the central axis of the outer casing 2 is a flat shape. Furthermore, the cross-sectional shape of the hollow portion inside the outer casing 2 is also a flat shape corresponding to the external shape of the outer casing 2, and the components housed within the outer casing 2 also have shapes corresponding to the flat shape of the hollow portion.

[0047] likeFigure 2 As shown, in the hollow portion of the housing 2, a cap member 4 constituting a first sealing member, a coil member 5, a coil member holder 6, a pressing member 7, a pen pressure detection module 8, and a substrate holder 9 are arranged in this order along the axial direction of the housing 2 from the pen tip side. In a substrate accommodating portion 91 of the substrate holder 9, a printed circuit substrate 10 is accommodated and clamped. The printed circuit substrate 10 is an example of a circuit substrate.

[0048] The core 3 is constituted by a core body portion 31 and a front end portion 32 that becomes a pen tip, and in a state in which all of the above-described members are accommodated in the hollow portion of the housing 2, the core body portion 31 is inserted from the opening of the housing 2 on the pen tip side, and is mounted by being clamped with the pressing member 7 provided in the pen pressure detection module 8 as described later. The core 3 is constituted by a resin such as polycarbonate, a synthetic resin, or ABS (acrylonitrile-butadiene-styrene) resin, which is an example of a hard non-conductive material, so that a pressure (pen pressure) applied to the front end portion 32 can be transmitted to the pressure-sensitive portion 83 of the pen pressure detection portion 81. This core 3 enables the electronic pen 1 to be inserted and removed.

[0049] The coil member 5 is constituted by a coil 51 and a magnetic core in which the coil 51 is wound, and in this example, the magnetic core is a ferrite magnetic core 52. In this example, in order to insert the core body portion 31 of the rod-shaped core 3 at the center axis position, the ferrite magnetic core 52 of the coil member 5 has a columnar shape having a diameter that is slightly larger than the diameter of the core body portion 31. In this embodiment, the ferrite magnetic core 52 has a flat cross-sectional shape that corresponds to the cross-sectional shape of the hollow portion of the housing 2, and the pen tip side has a structure in which a tapered portion 52b is thin. In addition, in this example, the front end portion 32 of the core 3 has a diameter that is slightly larger than the diameter of the core body portion 31.

[0050] The cap member 4 is provided on the side of the tapered portion 52b that becomes the pen tip side of the electronic pen of the ferrite magnetic core 52. The cap member 4 is constituted by a material having elasticity, such as elastic rubber, has a cap shape that covers the pen tip side of the ferrite magnetic core 52, and has an opening (through hole) 4a for inserting the core body portion 31 of the core 3. In this example, the diameter of the opening 4a is formed to be larger than the diameter of the through hole 52a of the ferrite magnetic core 52. Also, in this example, as shown in the drawing, the appearance of the cap member 4 becomes a flared skirt shape with a lower hem.

[0051] The coil member holder 6 is provided at the end portion side of the ferrite core 52 on the side opposite to the tapered portion 52b that becomes the pen tip side of the electronic pen. The coil member holder 6 is composed of a material having elasticity, such as elastic rubber. The end portion of the ferrite core 52 on the side opposite to the tapered portion 52b that becomes the pen tip side of the electronic pen becomes a coil non-winding portion 52c that does not have the coil 51 wound thereon. The coil member holder 6 has an engagement portion 61 that engages and houses the coil non-winding portion 52c of the ferrite core 52, and has a protrusion portion 62 that press-fits a hollow portion 821a of a pen pressure transmission member 82 of a pen pressure detection module 8 described later.

[0052] In the engagement portion 61 of the coil member holder 6, a recessed hole 61a that corresponds to the outer shape of the coil non-winding portion 52c is provided. Also, in the protrusion portion 62, a through-hole 62a through which the core body portion 31 of the core 3 is inserted is formed (see FIGS. 13 (A) and (B) described later). Figure 5 The through-hole 62a of the protrusion portion 62 communicates with the recessed hole 61a of the engagement portion 61. Therefore, in the coil member holder 6, a hollow space through which the core body portion 31 of the core 3 is inserted is formed by the engagement portion 61 and the protrusion portion 62.

[0053] Also, in a state in which the coil non-winding portion 52c of the ferrite core 52 of the coil member 5 and the engagement portion 61 of the coil member holder 6 are engaged, a through-hole 52a through which the core body portion 31 of the core 3 is inserted is formed in the ferrite core 52, so a hollow space through which the core body portion 31 of the core 3 is inserted is formed by the coil member 5 and the coil member holder 6.

[0054] The pressing member 7 provided at the protrusion portion 62 side of the coil member holder 6 has an engagement recessed hole 7a into which the end portion 31a of the core body portion 31 of the core 3 is press-fitted (see FIG. 13 (A) described later). Figure 5 The outer diameter of the pressing member 7 is selected to be larger than the through-hole 62a of the protrusion portion 62 of the coil member holder 6. Therefore, if the end portion 31a of the core body portion 31 of the core 3 protrudes to the pressing member 7 side in a state in which the core body portion 31 is inserted through the through-hole 52a of the ferrite core 52 of the coil member 5 and the recessed hole 61a of the engagement portion 61 and the through-hole 62a of the protrusion portion 62 of the coil member holder 6, and the end portion 31a is engaged with the pressing member 7, the core 3 becomes a state in which it does not fall out due to the presence of the pressing member 7. However, when the core 3 is strongly pulled to the front end portion 32 side, the engagement of the end portion 31a of the core body portion 31 and the engagement recessed hole 7a of the pressing member 7 is released, and the core 3 can be taken out. That is, the core 3 can be replaced.

[0055] In this embodiment, the pen pressure detection module 8 is configured by the pen pressure detection portion 81 and the pen pressure transmission member 82 being engaged and combined.

[0056] In this embodiment, the pen pressure detecting section 81 is constituted by a pressure sensitive section 83 composed of a plurality of pressure sensitive members and a holder 84 which holds the pressure sensitive section 83 and has a function of electrically connecting. The holder 84 is composed of an insulating material such as resin, has a holding section 841 which holds the pressure sensitive section 83 and a connecting section 842 for electrically connecting two electrodes provided in the pressure sensitive section 83 held by the holding section 841 to the printed circuit board 10 housed in the substrate holder 9 as one body.

[0057] The pen pressure transmitting member 82 is held by the holding section 841 of the holder 84 of the pen pressure detecting section 81 by engagement, so that the holding section 841 of the holder 84 holds the plurality of pressure sensitive members of the pressure sensitive section 83. Further, as described above, the pen pressure transmitting member 82 has the hollow section 821a into which the protruding section 62 of the coil member holder 6 is press-fitted. By press-fitting the protruding section 62 of the coil member holder 6 into the hollow section 821a of the pen pressure transmitting member 82 which is combined by engagement with the pen pressure detecting section 81, the pen pressure detecting module 8 and the coil member 5 are combined.

[0058] Figure 3 is an exploded perspective view for explaining a structure example of the pen pressure detecting module 8 in more detail. Further, Figure 4 is a view for explaining a group of pressure sensitive members which constitute the pressure sensitive section 83. Further, Figure 5 (A) is a sectional view of the vicinity of the pen pressure detecting module 8 in a state of being housed in the housing 2. Also, Figure 5 (B) is an appearance perspective view of the coil member holder 6 as viewed from the side of the protruding section 62 thereof, Figure 5 (C) is an appearance perspective view of the pen pressure transmitting member 82 as viewed from the side of the combining section thereof with the pen pressure detecting section 81.

[0059] In this embodiment, as shown in Figure 3 and Figure 4 , the pressure sensitive section 83 of the pen pressure detecting section 81 is constituted by a dielectric 831, a spacer 832 and a conductive elastic body 833.

[0060] As shown in Figure 4 (A), the dielectric 831 becomes a substantially circular plate shape, for example, has one circular face 831a and another face 831b which oppose each other, and a circular conductor layer 834 is formed on the one face 831a of the dielectric 831. The conductor layer 834 constitutes a first electrode of a variable capacitor which is the pressure sensitive section 83 in this example.

[0061] The spacer 832 is composed of an insulating material, as shown in Figure 4 (B), becomes a thin plate shape structure of a ring shape having the same outer diameter as the diameter of the dielectric 831.

[0062] In this example, the conductive elastomer 833 is composed of an elastic rubber having conductivity. As shown in (C), the conductive elastomer 833 of this example is shaped such that two protruding portions 833b and 833c are formed from edges of a thin plate-shaped body 833a of a circular plate shape having the same diameter as that of the dielectric 831, at 180 degrees from each other. The dielectric 832 bonds the circular plate-shaped body 833a of the conductive elastomer 833, for example. Figure 4 (C), the conductive elastomer 833 of this example is shaped such that two protruding portions 833b and 833c are formed from edges of a thin plate-shaped body 833a of a circular plate shape having the same diameter as that of the dielectric 831, at 180 degrees from each other. The dielectric 832 bonds the circular plate-shaped body 833a of the conductive elastomer 833, for example.

[0063] Further, on the other face 831b side of the dielectric 831, the conductive elastomer 833 is overlapped via the dielectric 832, thereby constituting a variable capacitance capacitor as the pressure-sensitive portion 83 of this example. The variable capacitance capacitor as the pressure-sensitive portion 83 of this example has a first electrode composed of the conductor layer 834 formed on the one face 831a of the dielectric 831 and a second electrode composed of the conductive elastomer 833.

[0064] The holder 84 of the pen pressure detection portion 81 is, for example, an injection molded product using a resin, and is structured to integrally have the holding portion 841 and the connecting portion 842. The connecting portion 842 of the holder 84 of the pen pressure detection portion 81 has a plate-shaped protruding portion 8421 protruding in a direction parallel to the substrate face 10a of the printed circuit board 10 and in the axial direction (the same direction as the direction of application of pen pressure). The protruding portion 8421 has a plane parallel to the substrate face 10a of the printed circuit board 10. The plane of this protruding portion 8421 is disposed so as to just come into contact with the substrate face 10a when the pen pressure detection module 8 is fitted to the substrate holder 9 to be engaged with the printed circuit board 10.

[0065] In this embodiment, in the holder 84, as a three-dimensional fine pattern of conductivity, two terminal members 843 and 844 are formed along the direction of application of pen pressure, that is, along the axial direction of the electronic pen 1, in the entire range from the holding portion 841 to the connecting portion 842 (for easy understanding, in Figure 2 and Figure 3 , shown with oblique lines). As a result, the terminal members 843 and 844 are in a state of being integrally formed on the holder 84.

[0066] Here, as a method of forming the two terminal members 843 and 844 as three-dimensional fine patterns on the surface of the holder 84, for example, MIPTEC (Microscopic Integrated Processing Technology) developed by Panasonic Corporation can be used. On the surface of the terminal members 843 and 844 formed as three-dimensional fine patterns, a nickel plating layer is formed in order to easily perform electrical connection by contact, and further, a gold plating layer is formed thereon.

[0067] AsFigure 2 and Figure 3 As shown in FIG. 8B, in the protruding portion 8421, two terminal members 843 and 844 are formed in a state of being isolated from each other along the long side in the direction in which the pen pressure is applied, at both end edges in the direction orthogonal to the direction in which the pen pressure is applied. Also, the two terminal members 843 and 844 are formed to be exposed at least in both end edges of the protruding portion 8421.

[0068] The holding portion 841 of the holder 84 of the pen pressure detection portion 81 has a recessed portion 841a that accommodates the pressure sensitive portion 83 in which the dielectric 831, the spacer 832, and the conductive elastic body 833 are combined, and has engagement protrusions 841b, 841c, 841d, and 841e that protrude from the recessed portion 841a toward the pen pressure transmission member 82 side (the core 3 side) along the axial direction. At the bottom of the recessed portion 841a, one end portion 844a of the terminal member 844 is exposed to form (refer to the oblique line portion of FIG. 8B). Figure 3 The dielectric 831 is accommodated in a manner that the conductor layer 834 formed on one face 831a abuts against the one end portion 844a of the terminal member 844 at the bottom of the recessed portion 841a. Thus, in a state in which the dielectric 831 is accommodated and held in the recessed portion 841a, the conductor layer 834 that is the first electrode of the pressure sensitive portion 83 and the one end portion 844a of the terminal member 844 are in contact and electrically connected.

[0069] Further, between the engagement protrusions 841b and 841c of the holding portion 841 of the holder 84 of the pen pressure detection portion 81, and between the engagement protrusions 841d and 841e, end faces at which the protruding portions 833b and 833c of the conductive elastic body 833 are butted are formed. Also, in this embodiment, at the end face between the engagement protrusions 841b and 841c, one end portion 843a of the terminal member 843 is exposed to form (refer to the oblique line portion of FIG. 8B). Figure 3 Thus, in a state in which the conductive elastic body 833 is accommodated and held in the recessed portion 841a of the holder 84 together with the dielectric 831 and the spacer 832, the protruding portion 833b of the conductive elastic body 833 butts against the one end portion 843a of the terminal member 843, and thus the conductive elastic body 833 and the terminal member 843 are in contact and electrically connected.

[0070] Thus, in this embodiment, by accommodating and holding the pressure sensitive portion 83 in the holding portion 841 of the holder 84 of the pen pressure detection portion 81, the first electrode and the second electrode of the pressure sensitive portion 83 are in a state of being automatically electrically connected to the two terminal members 843 and 844 of the connecting portion 842.

[0071] Moreover, in this embodiment, the two terminal members 843 and 844 of the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 are electrically connected to the conductive patterns formed on the printed circuit board 10 housed in the substrate holder 9.

[0072] The substrate holder 9 is composed of an insulating material such as resin, and has a substrate housing portion 91 and a fitting portion 92 of the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8.

[0073] The substrate housing portion 91 of the substrate holder 9 is formed in a box shape without a lid, and the printed circuit board 10 of an elongated rectangular shape is housed in the recessed portion 91a of the substrate housing portion 91 with the long side direction thereof as the axial direction of the electronic pen 1. In this case, the depth of the recessed portion 91a of the substrate housing portion 91 is substantially equal to the thickness of the printed circuit board 10.

[0074] Furthermore, in this embodiment, the fitting portion 92 of the substrate holder 9 has a cylindrical shape with a hollow portion into which the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8 is inserted. In the printed circuit board 10, the conductor patterns 101 and 102 are formed to be positioned to be electrically connected to the two terminal members 843 and 844 of the two electrodes of the pressure sensitive portion 83, which are the two terminal members of the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 (see Figure 2 ).

[0075] Moreover, when the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8 is inserted into the fitting portion 92 of the substrate holder 9, it is engaged as shown in Figure 5 (A) to be in contact with the upper surface (substrate surface) 10a of the printed circuit board 10 housed in the substrate housing portion 91 of the substrate holder 9. Thus, the two electrodes of the pressure sensitive portion 83 held in the pen pressure detection portion 81 are electrically connected to the conductor patterns 101 and 102 formed on the substrate surface 10a of the printed circuit board 10 through the two terminal members 843 and 844 of the connecting portion 842. The two terminal members 843 and 844 of the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8 are in contact with the conductor patterns 101 and 102 of the printed circuit board 10 by the fitting of the pen pressure detection portion 81 of the pen pressure detection module 8 with the substrate holder 9 and the printed circuit board 10, and are in a state of being electrically connected, but in this embodiment, they are soldered to further strengthen the electrical connection.

[0076] In addition, the substrate holder 9 is not movable in the direction of application of the pen pressure applied to the stylus 3 by the cover 21. Therefore, when the pen pressure detection module 8 is fitted to the substrate holder 9, the pen pressure detection module 8 is not movable in the axial direction within the housing 2 of the electronic pen 1. Therefore, the pen pressure detection portion 81 can reliably detect the pen pressure applied to the stylus.

[0077] In this embodiment, as shown in Figure 5 (A), a seal member 93 that seals the gap between the inner wall of the hollow portion of the housing 2 when housed in the housing 2 is provided in the fitting portion 92 of the substrate holder 9. That is, Figure 6 is a view showing the appearance of the seal member 93, and is composed of a ring-shaped member made of an elastic body such as rubber. In the fitting portion 92 of the substrate holder 9, as shown in Figure 5 (A), a ring-shaped groove 92a is formed in the circumferential side portion thereof, and the seal member 93 is fixedly housed in the ring-shaped groove 92a. In this embodiment, a protrusion 93a is formed in the seal member 93 so that the seal member 93 does not rotate in the circumferential direction of the fitting portion 92, and a cutout 92b that houses the protrusion 93a of the seal member 93 is formed in a portion of the ring-shaped groove of the fitting portion 92 (see Figure 5 (A)).

[0078] The space in the hollow portion of the housing 2 in which the printed circuit board 10 is disposed is separated from the space on the side of the opening portion 2a in which the stylus 3 in which the pen pressure detection module 8 is present protrudes by the seal member 93. Therefore, the seal member 93 corresponds to a second seal member.

[0079] The electronic pen 1 of this embodiment uses a resonant circuit composed of the coil 51 wound around the ferrite core 52 of the coil member 5 and a capacitor to transmit the pointing position thereof to the position detection device. The capacitor 103 that constitutes the resonant circuit is formed on the board surface 10a of the printed circuit board 10 as shown in Figure 2 In addition, a side switch 104 composed of a push switch that becomes conductive and non-conductive by being pressed is provided in the board surface 10a of the printed circuit board 10. Further, a capacitor 105 or other electronic component is provided in the board surface 10a of the printed circuit board 10 in series with the side switch 104.

[0080] In addition, the series circuit of the side switch and the capacitor 105 is connected in parallel with the resonant circuit composed of the coil 51 and the capacitor 103, and the resonant frequency of the resonant circuit is changed according to the conduction and non-conduction of the side switch 104, thereby transmitting to the position detection device 202 whether the side switch 104 is conductive or non-conductive.

[0081] Furthermore, as described above, the pen pressure detection module 8 of this embodiment uses a variable capacitor that exhibits electrostatic capacitance corresponding to the pen pressure as a pressure-sensitive unit 83 in its pen pressure detection unit 81. The electronic pen 1 connects the variable capacitor of the pressure-sensitive unit 83 of the pen pressure detection unit 81 of the pen pressure detection module 8 to the resonant circuit, thereby setting the resonant frequency of the resonant circuit to a frequency corresponding to the pen pressure.

[0082] The position detection device 202 corresponding to the electronic pen 1 has the function of detecting the pen pressure applied to the pen tip of the electronic pen 1 by detecting the change in the resonant frequency of the electromagnetic coupling signal from the electronic pen 1. The conductor patterns 101 and 102 described above use a variable capacitor, which is composed of the pressure-sensitive part 83 of the pen pressure detection unit 81 of the pen pressure detection module 8, as a terminal part for connecting to the resonant circuit.

[0083] like Figure 5 As shown in (A) and (C), the pen pressure transmission member 82 of the pen pressure detection module 8 is integrally formed by a cylindrical body portion 821 having a hollow portion 821a inside and a blocking layer 822 that closes the hollow space of the hollow portion 821a of the cylindrical body portion 821.

[0084] In this example, the barrier layer 822 is composed of a thin plate-like body, but as Figure 5 As shown in (A) and (C), by forming recesses 822a and 822b in the thin plate-like body, the thickness of the recesses 822a and 822b is reduced, thereby enabling elastic displacement in the thickness direction of the plate. Furthermore, in this embodiment, the barrier layer 822 is made of an elastic member, such as an elastic body, and combined with the thin portions of the recesses 822a and 822b, further enabling elastic displacement in the thickness direction of the plate.

[0085] The cylindrical portion 821 can be made of a non-elastic material such as resin, or it can be made of an elastomer, similar to the barrier layer 822. When the cylindrical portion 821 is made of a non-elastic material and the barrier layer 822 is made of an elastic elastomer, the pen pressure transmission member 82 can be manufactured by a two-color molding method.

[0086] Furthermore, the side of the hollow portion 821a of the cylindrical body portion 821 without the blocking layer 822 becomes an opening, and the protrusion 62 of the coil component support 6 is pressed into the hollow portion 821a from this opening side. In this example, a [feature] is provided on the side circumferential surface of the protrusion 62 of the coil component support 6. Figure 5The two annular protrusions 621, 622 shown in (A) and (B) are protrusions by which the coil member holder 6 is fitted to the pen pressure transmitting member 82 in such a manner that no gap is created between the inner wall of the pen pressure transmitting member 82 and the coil member holder 6. In this example, two annular protrusions 621, 622 are formed in the protrusion 62, but the annular protrusions can be one.

[0087] Before the press-fitting of the coil member holder 6, the pressing member 7 is housed in the hollow portion 821a of the pen pressure transmitting member 82 in such a manner that the fitting recess 7a faces the opening side of the cylindrical body portion 821, and the side of the pressing member 7 opposite the fitting recess 7a abuts against the barrier layer 822 of the pen pressure transmitting member 82. Since the outer diameter of the pressing member 7 is larger than the through-hole 62a of the protrusion 62 of the coil member holder 6, if the coil member holder 6 is press-fitted to the hollow portion 821a of the pen pressure transmitting member 82, the pressing member 7 is housed in the hollow portion 821a in such a manner that it does not fall out of the hollow portion 821a of the pen pressure transmitting member 82.

[0088] Further, if the core body portion 31 of the core 3 is press-fitted through the through-hole 52a of the ferrite core 52 of the coil member 5, the recess 61a of the fitting portion 61 of the coil member holder 6, and the through-hole 62a of the protrusion 62, the end portion 31a of the core body portion 31 of the core 3 is press-fitted to the fitting recess 7a of the pressing member 7 of the hollow portion 821a of the pen pressure transmitting member 82 as shown in (A). Figure 5 (A) as shown.

[0089] Therefore, if pen pressure is applied to the core 3, the pen pressure is transmitted to the pressing member 7, which presses the barrier layer 822 of the pen pressure transmitting member 82, and the barrier layer 822 is elastically displaced in the axial direction in accordance with the applied pen pressure.

[0090] As shown above, when the coil member 5 is fitted to the pen pressure transmitting member 82 via the coil member holder 6, a hollow space in which the core body portion 31 of the core 3 is inserted is formed by the through-hole 52a of the ferrite core 52 of the coil member 5, the recess 61a of the fitting portion 61 of the coil member holder 6, and the through-hole 62a of the protrusion 62 being continuous. This hollow space is closed by the barrier layer 822 of the pen pressure transmitting member 82. That is, in this example, the coil member 5, the coil member holder 6, and the pen pressure transmitting member 82 are combined by fitting, thereby constituting a core insertion member.

[0091] In the cylindrical body portion 821 of the pen pressure transmitting member 82, a fitting protrusion 823a that fits with the fitting protrusions 841b and 841c of the holding portion 841 of the holder 84 of the pen pressure detecting portion 81, and a fitting protrusion 823b that fits with the fitting protrusions 841d and 841e are formed. At the front ends of the fitting protrusions 841b and 841c of the holding portion 841 of the holder 84, fitting claw portions 841bt and 841ct that fit with the fitting protrusion 823a are formed, and at the front ends of the fitting protrusions 841d and 841e, fitting claw portions 841dt and 841et that fit with the fitting protrusion 823b are formed.

[0092] Further, if the pen pressure transmitting member 82 is coupled to the holder 84 in the axial direction in a state in which the pressure sensitive portion 83 is accommodated in the holding portion 841 of the holder 84, as shown in FIG. 8B, the pen pressure transmitting member 82 and the holder 84 are coupled, and as a result, the pressure sensitive portion 83 is held by the holding portion 841 of the holder 84. At this time, the fitting claw portions 841bt and 841ct at the front ends of the fitting protrusions 841b and 841c of the holding portion 841 of the holder 84 fit with the fitting protrusion 823a of the pen pressure transmitting member 82, and the fitting claw portions 841dt and 841et at the front ends of the fitting protrusions 841d and 841e fit with the fitting protrusion 823b, and the pen pressure transmitting member 82 is coupled to the holding portion 841 of the holder 84. As a result, the pen pressure transmitting member 82 is clamped to the holder 84, and a state in which the pen pressure transmitting member 82 and the holder 84 are coupled is achieved. Figure 2

[0093] In this way, in a state in which the pen pressure transmitting member 82 and the holder 84 are coupled as shown in FIG. 8B, as shown in FIG. 8C, the conductor layer 834 (first electrode) of one end surface of the dielectric 831 of the pressure sensitive portion 83 is electrically connected to one end portion 844a of the terminal member 844, and the protruding portion 833b of the electrically conductive elastic body 833 (second electrode) is electrically connected to one end portion 843a of the terminal member 843 in the holding portion 841 of the holder 84 of the pen pressure detecting portion 81. Figure 3

[0094] Further, in a state in which the pen pressure transmitting member 82 and the holder 84 are coupled as shown in FIG. 8B, as shown in FIG. 8D, the barrier layer 822 of the pen pressure transmitting member 82 becomes a state in which the electrically conductive elastic body 833 of the pressure sensitive portion 83 can be pressed. In this embodiment, as shown in FIG. 8D, the barrier layer 822 of the pen pressure transmitting member 82 is in contact with the electrically conductive elastic body 833 of the pressure sensitive portion 83. Figure 5 Figure 5 ​​​(C) shown, the front end 823at of the blocking layer 822 side of the engagement protrusion 823a of the pen pressure transmission member 82 and the front end 823bt of the blocking layer 822 side of the engagement protrusion 823b are formed obliquely in a manner that they protrude slightly more than the face of the blocking layer 822 in the axial direction. Therefore, according to the presence of the front end 823at of the blocking layer 822 side of the engagement protrusion 823a of the pen pressure transmission member 82 and the front end 823bt of the blocking layer 822 side of the engagement protrusion 823b, when no pen pressure is applied, as shown in Figure 5 (A) shown, the blocking layer 822 and the conductive elastomer 833 of the pressure sensitive portion 83 are opposed across a minute space.

[0095] And, as mentioned previously, if pen pressure is applied to the core 3, according to the pen pressure applied, the blocking layer 822 of the pen pressure transmission member 82 is pressed by the pressing member 7, the blocking layer 822 elastically displaces in the axial direction according to the pen pressure applied, and the conductive elastomer 833 of the pressure sensitive portion 83 is pressed by the elastic displacement of the blocking layer 822. Therefore, the conductive elastomer 833 and the dielectric 831 isolated by the spacer 832 come into contact, and the contact area thereof changes according to the pen pressure. An electrostatic capacitance corresponding to the contact area of the conductive elastomer 833 and the dielectric 831 is obtained between the first electrode and the second electrode of the pressure sensitive portion 83. That is, according to the electrostatic capacitance of the capacitance variable capacitor that is the pressure sensitive portion 83, pen pressure can be detected.

[0096] As shown above, the coil member 5 is fitted to the pen pressure transmission member 82 of the pen pressure detection module 8 via the coil member holder 6, and the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8 is coupled to the printed circuit board 10 via the fitting portion 92 of the board holder 9. Thus, the coil member 5 composed of the ferrite core 52 with the coil 51 wound therearound, the pen pressure detection module 8, and the board holder 9 that holds the printed circuit board 10 are coupled to each other, and become a structure of one module (pen module component).

[0097] And, after the pen pressure detection module 8 and the board holder 9 that holds the printed circuit board 10 are fitted and coupled, as shown in Figure 7 As shown in (B) and (C) of FIG. 8, one and the other end portions 51a and 51b of the coil 51 of the coil member 5 are connected to the terminal member 843 and the terminal member 844, for example, by soldering at the portion of the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 that is fitted to the fitting portion 92 of the board holder 9. Figure 7 The portions colored black in (B) and (C) of FIG. 8 indicate the soldered portions.

[0098] And, in this embodiment, as shown in Figure 2 and Figure 7As shown, in the fitting portion 92 of the substrate holder 9, in order to make the one and the other end portions 51a and 51b of the coil 51 not interfere with the fitting with the pen pressure detection module 8, notches 92a and 92b are formed.

[0099] Further, in this embodiment, in the pen pressure transmission member 82 of the pen pressure detection module 8, grooves 824a and 824b in the axial direction are formed, and on the circumferential side surface of the holder 84 of the pen pressure detection portion 81, grooves 845a and 845b in the axial direction that are connected to the grooves 824a and 824b of the pen pressure transmission member 82 are also formed. As shown in Figure 7 As shown, the one and the other end portions 51a and 51b of the coil 51 of the coil member 5 are connected by welding the terminal member 843 and the terminal member 844 of the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 within the grooves 824a and 824b and the grooves 845a and 845b.

[0100] Thus, the one and the other end portions 51a and 51b of the coil 51 of the coil member 5 do not protrude in the direction orthogonal to the axial direction in the pen module member. Further, in this example, as shown in Figure 5 (B), on the outer circumferential portion of the fitting portion 61 of the coil member holder 6, stepped portions 61b and 61c for making the one and the other end portions 51a and 51b of the coil not protrude from the pen module member are formed.

[0101] In addition, in the terminal member 843 and the terminal member 844, instead of simply welding the one and the other end portions 51a and 51b of the coil 51, a V-shaped metal terminal or the like can be formed at the position of the terminal member 843 and the terminal member 844, and the one and the other end portions 51a and 51b of the coil 51 can be engaged with the V-shaped metal terminal. At this time, welding can also be performed in order to more reliably make the electrical connection.

[0102] In this way, by electrically connecting the one and the other end portions 51a and 51b of the coil 51 to the terminal member 843 and the terminal member 844, the terminal member 843 and the terminal member 844 are connected to the capacitor 103 of the printed circuit substrate 10, thereby constituting a resonance circuit, and in parallel with the resonance circuit, a variable capacitor composed of the pressure sensitive portion 83 is connected. Thus, it is not necessary to extend the one and the other end portions 51a and 51b of the coil 51 to the printed circuit substrate 10 and to perform welding in the substrate surface 10a of the printed circuit substrate 10.

[0103] As shown in (A) above, after the pen pressure detection module 8 and the substrate holder 9 that holds the printed circuit board 10 are combined with each other, the terminal members 843 and 844 of the connecting portion 842 of the pen pressure detection portion 81 are soldered to the connecting portions of the conductor patterns 101 and 102 of the board face 10a of the printed circuit board 10 as necessary. After that, as shown in Figure 5 (A) and Figure 9 As shown in (A) above, after the pen pressure detection module 8 and the substrate holder 9 that holds the printed circuit board 10 are combined with each other, the terminal members 843 and 844 of the connecting portion 842 of the pen pressure detection portion 81 are soldered to the connecting portions of the conductor patterns 101 and 102 of the board face 10a of the printed circuit board 10 as necessary. After that, as shown in

[0104] Also, the pen module component, which is a structure in which the above-described coil member 5, pen pressure detection module 8, and substrate holder 9 that holds the printed circuit board 10 are combined with each other, is housed in the hollow portion of the housing 2 of the electronic pen 1. At the time of housing the pen module component in the hollow portion of the housing 2, the press operation member 22 for the press side switch 104 is installed.

[0105] Figure 9 (A) is a cross-sectional view of a portion of the housing 2 in which the substrate holder 9 is housed. Also, Figure 9 (B) is a view of the mounting member 23 of the side switch 104 as seen from the side of the face that opposes the printed circuit board 10. Also, Figure 9 (C) is a view of the press operation member 22 for the side switch 104 as seen from the side of the face that opposes the printed circuit board 10.

[0106] As shown in (A) above, after the pen pressure detection module 8 and the substrate holder 9 that holds the printed circuit board 10 are combined with each other, the terminal members 843 and 844 of the connecting portion 842 of the pen pressure detection portion 81 are soldered to the connecting portions of the conductor patterns 101 and 102 of the board face 10a of the printed circuit board 10 as necessary. After that, as shown in Figure 9 (A) above, in the housing 2, a through hole 2b for disposing the press operation member 22 is formed. The press operation member 22 is composed of, for example, resin, and as shown in Figure 9 (C) above, is formed in a shape that fits into the through hole 2b of the housing 2. In the face of the press operation member 22 that opposes the printed circuit board 10, as shown in Figure 9 (A) and (C) above, a cylindrical protrusion 221 and 222 that engages with the mounting member 23 are formed.

[0107] The mounting member 23 is composed of a material that has elasticity, which in this example is resin, and in the mounting member 23, a through hole 231 and 232 into which the protrusions 221 and 222 of the press operation member 22 engage, and a protrusion 233 for pressing the side switch 104 are formed. The through holes 231 and 232 of the mounting member 23 have a circular portion 231a and 232a that has the same diameter as the diameter of the protrusions 221 and 222 of the press operation member 22, and a straight hole 231b and 232b that has a width that is shorter than the diameter of the protrusions 221 and 222.

[0108] At the root positions of the cylindrical protrusions 221 and 222 of the press operation member 22, notch portions 221a and 222a are formed which engage with the linear holes 231b and 232b of the through holes 231 and 232 of the mounting member 23 so that the press operation member 22 does not come off the mounting member 23 (refer to Figure 9 the broken line of (C)). In addition, the linear holes 231b and 232b of the through holes 231 and 232 of the mounting member 23 are formed to be slightly thinner than the other portions of the mounting member 23 in accordance with the notch portions 221a and 222b of the root positions of the cylindrical protrusions 221 and 222 of the press operation member 22.

[0109] Also, as shown in Figure 9 (A) and Figure 2 , at the end portion of the housing cover 21 side of the substrate holder 9, a recessed hole 91b is provided for the mounting member 23 to be fitted. On the other hand, at the end portion in the longitudinal direction of the mounting member 23, as shown in Figure 9 (A) and (B), a curved protrusion 234 is formed which fits into the recessed hole 91b.

[0110] After the pen module member is housed in the housing 2, as shown in Figure 9 (A), the curved protrusion 234 of the mounting member 23 fits into the recessed hole 91b of the substrate holder 9 so that the protrusion 233 of the mounting member 23 can press the side switch 104, and the mounting member 23 is mounted on the upper surface of the printed circuit board 10 covered by the resin molded member 110 of the substrate holder 9.

[0111] Next, the pen module member on which the mounting member 23 is mounted is housed in the housing 2 from the side opposite the pen tip side opening portion 2a. Also, if the portions of the through holes 231 and 232 of the mounting member 23 mounted on the pen module member are brought into proximity with the through hole 2b of the housing 2, the press operation member 22 is inserted into the through hole 2b of the housing 2, and the protrusions 221 and 222 of the press operation member 22 are inserted into the circular portions 231a and 232a of the through holes 231 and 232 of the mounting member 23 so as to be engaged.

[0112] Also, the pen module member is further pressed into the housing 2. Then, the protrusions 221 and 222 of the press operation member 22 inserted into the circular portions 231a and 232a of the through holes 231 and 232 of the mounting member 23 engage with the linear holes 231b and 232b of the through holes 231 and 232 of the mounting member 23, and the press operation member 22 engages with the mounting member 23 so as not to come off. As shown above, the press operation member 22 is mounted by engaging with the mounting member 23 when the pen module member is housed in the housing 2.

[0113] At this time, in the vicinity of the opening portion of the pen module member on the pen tip side of the hollow portion of the housing 2, the cover member 4 is arranged so as to cover the tapered portion 52b of the ferrite core 52, as described above. As described above, the cover member 4 is composed of elastic rubber, and functions as a first sealing member that seals the gap between the front end side of the ferrite core 52 of the coil member 5 and the inner wall surface of the hollow portion of the housing 2 so as to be eliminated.

[0114] Figure 8 is a sectional view of the opening portion 2a side of the housing 2 of the electronic pen 1 when the pen module member is accommodated in the hollow portion within the housing 2. At this time, the pen module member is in a state of being pressed toward the opening portion 2a side of the housing 2 by the housing cover 21 when the housing cover 21 and the housing 2 are fitted. Therefore, the tapered portion 52b of the ferrite core 52 of the coil member 5 presses the cover member 4 toward the inner wall side of the housing 2, and thereby seals the gap with the inner wall of the housing 2 so as to be eliminated. In this example, since the cover member 4 has a flared skirt shape with a lower hem as described above, the cover member 4 and the inner wall surface of the housing 2 are in close contact at two places, as shown in FIG. 8, and the dustproof effect and the waterproof effect based on the sealing are improved. Figure 8

[0115] Furthermore, by the sealing of the opening portion 2a side of the housing 2 based on the cover member 4, the space of the through-hole 52a of the ferrite core 52 and the space of the hollow portion of the housing 2 that accommodates the pen module member are separated.

[0116] That is, as described above, in this example, the core insertion member is constituted by the fitting and coupling of the coil member 5, the coil member holder 6, and the pen pressure transmission member 82. Furthermore, the hollow space of the core insertion member is constituted by the through-hole 52a of the ferrite core 52 of the coil member 5, the recessed hole 61a and the through-hole 62a of the coil member holder 6, and the hollow portion 821a of the pen pressure transmission member 82, and is closed by the barrier layer 822 of the pen pressure transmission member 82.

[0117] At this time, in the fitting portion of the protruding portion 62 of the coil member holder 6 and the pen pressure transmission member 82, the annular protruding portions 621 and 622 of the coil member holder 6 are in close contact with the inner wall of the hollow portion 821a of the pen pressure transmission member 82 without a gap, and thus the sealing is ensured. Thereby, the hollow space of the core insertion member becomes an independent space that is isolated from the other spaces except for the opening side of the through-hole 52a of the ferrite core 52. Furthermore, since there are no electrical components and no electrical connection portions in the hollow space of the core insertion member, it is not necessary to ensure the waterproofness and the dustproofness in the hollow space of the core insertion member.

[0118] ​Further, on the tapered portion 52b side of the ferrite core 52 which is the end portion of the core insertion member on the side of the core 3, as explained in the above-described Figure 8 by the sealing between the lid member 4 and the inner wall of the housing 2, the hollow space of the core insertion member and the space of the hollow portion of the housing 2 which accommodates the pen module components are separated.

[0119] Therefore, even if dust or moisture intrudes into the hollow space of the core insertion member, the dust or moisture does not intrude into the space of the hollow portion of the housing 2 which accommodates the pen module components inside. Therefore, it is not necessary to seal between the core 3 and the hollow space of the core insertion member, and even if the core 3 is allowed to move freely in the axial direction, it is possible to ensure the waterproofness and the dustproofness of the electronic pen 1.

[0120] Further, in the state where the pen module components are accommodated inside the housing 2, as shown in Figure 5 (A) and Figure 9 (A), the hollow portion of the housing 2 is sealed in a manner that is separated on the side of the tip of the pen from the side of the housing lid 21, with the sealing member 93 of the substrate holder 9 being in close contact with the inner wall surface of the housing 2 at the fitting portion 92 of the pen pressure detection module 8.

[0121] As explained above, on the side of the tip of the pen, the space of the hollow portion of the housing 2 is sealed by the lid member 4 with respect to the outside space. Therefore, the space of the hollow portion of the housing 2 on the side of the tip of the pen from the fitting portion 92 becomes a closed space where the waterproofness and the dustproofness are ensured, by the first sealing based on the lid member 4 and the second sealing based on the sealing member 93 of the fitting portion 92.

[0122] Therefore, the space of the hollow portion of the housing 2 on the side of the tip of the pen from the fitting portion 92 prevents the intrusion of moisture and the intrusion of dust from the outside space on the side of the opening portion 2a of the tip of the electronic pen 1, and prevents the intrusion of moisture and the intrusion of dust through the through hole 2b of the portion where the press operation element 22 is provided of the side switch 104. As explained above, in the space of the hollow portion of the housing 2 on the side of the tip of the pen from the fitting portion 92, the pressure sensitive portion 83 is disposed, and the connection portions of the coil 51 and the pressure sensitive portion 83 and the capacitor 103 or the side switch 104, the capacitor 105 of the printed circuit substrate 10 are disposed, but it is possible to ensure the waterproofness and the dustproofness with respect to them as well.

[0123] Further, since the substrate surface 10a of the printed circuit substrate 10 is covered by the resin molding member 110, even if moisture and dust intrude through the through-hole 2b of the portion provided with the press operation element 22 of the side switch 104, the waterproofness and dustproofness of the electronic components on the substrate surface 10a of the printed circuit substrate 10 can be ensured.

[0124] Further, in this embodiment, by the fitting of the coil member 5 to the stylus pressure transmission member 82 of the stylus pressure detection module 8 via the coil member support 6, the center line position of the axial direction of the stylus pressure detection module 8 and the center line position of the axial direction of the ferrite core 52 of the coil member 5 become coincident. Further, by the fitting of the stylus pressure detection module 8 to the fitting portion 92 of the substrate support 9, the stylus pressure detection module 8 is combined with the printed circuit substrate 10, so that the stylus pressure detection module 8 can be combined with the substrate support 9 and the printed circuit substrate 10 at a predetermined position. Further, in a state where the stylus module components are accommodated in the hollow portion of the housing 2, the substrate support 9 is combined with the housing cover 21 so that the center line position of the axial direction of the stylus pressure detection module 8 and the center line position of the axial direction of the ferrite core 52 become coincident with the center line position of the axial direction of the hollow portion of the housing 2.

[0125] Further, the core body main portion 31 of the core body 3 is inserted through the opening portion 2a of the housing 2 (see Figure 8 the opening 4a of the cover member 4, and the through-hole 52a of the ferrite core 52, and is fitted to the press member 7 in the stylus pressure transmission member 82 of the stylus pressure detection module 8.

[0126] As shown above, according to this embodiment, by merely accommodating the stylus module components in the housing 2, the first sealing and the second sealing for the waterproofness and dustproofness of the electronic stylus 1 can be performed. Further, according to this embodiment, since the hollow space of the core insertion member constituted by the coil member 5, the coil member support 6, and the stylus pressure transmission member 82 of the stylus pressure detection module 8 is not sealed from the outside, the core body 3 can freely move in the axial direction.

[0127] Further, according to the above-described embodiment, by merely fitting the stylus pressure detection module 8 to the fitting portion 92 of the substrate support 9 to which the printed circuit substrate 10 is clamped, the two terminal members 843 and 844 of the stylus pressure detection module 8 are brought into contact with the conductor patterns 101 and 102 formed on the substrate surface 10a of the printed circuit substrate 10 to be electrically connected. That is, by merely fitting the stylus pressure detection module 8 to the fitting portion 92 of the substrate support 9, the alignment of the electrical connection of the two terminal members 843 and 844 of the stylus pressure detection module 8 and the conductor patterns 101 and 102 of the printed circuit substrate 10 is automatically performed.

[0128] [Circuit configuration for position detection and pen pressure detection by electronic pen 1 in position detection device 202]

[0129] Next, referring to Figure 10 An example of a circuit configuration in the position detection device 202 that uses the electronic pen 1 to detect a position and pen pressure will be described. Figure 10 is a block diagram showing an example of a circuit configuration of the position detection device 202.

[0130] The electronic pen 1 is provided with a resonance circuit 1R that is a parallel circuit of a series circuit of the coil 51, the capacitor 103, a variable capacitor 83C that is a capacitor formed by the pressure-sensitive portion 83 of the pen pressure detection portion 81 of the pen pressure detection module 8, the side switch 104, and the capacitor 105. At this time, since the electrostatic capacitance of the variable capacitor 83C that is a capacitor formed by the pressure-sensitive portion 83 of the pen pressure detection portion 81 changes according to the pen pressure applied, the resonance frequency of the resonance circuit 1R changes according to the pen pressure. Further, the resonance frequency of the resonance circuit 1R changes by controlling whether or not the capacitor 105 is connected to the resonance circuit 1R at the time of conduction and at the time of disconnection of the side switch 104.

[0131] In the position detection device 202, the position on the sensor indicated by the electronic pen 1 is detected from the position on the sensor at which the signal received from the resonance circuit 1R of the electronic pen 1 by electromagnetic coupling is detected, and the pen pressure applied to the core 3 of the electronic pen 1 is detected by detecting the change in the resonance frequency from the phase change of the signal received from the resonance circuit 1R of the electronic pen 1 by electromagnetic coupling.

[0132] In the position detection device 202, the X-axis direction loop coil group 241 and the Y-axis direction loop coil group 242 are stacked to form the position detection coil 240. Further, in the position detection device 202, a selection circuit 243 that connects the X-axis direction loop coil group 241 and the Y-axis direction loop coil group 242 is provided. The selection circuit 243 sequentially selects one loop coil of the two loop coil groups 241, 242.

[0133] Further, in the position detection device 202, an oscillator 251, a current driver 252, a switching connection circuit 253, a reception amplifier 254, a detector 255, a low-pass filter 256, a sample-and-hold circuit 257, an A / D conversion circuit 258, a synchronous detector 259, a low-pass filter 260, a sample-and-hold circuit 261, an A / D conversion circuit 262, and a processing control portion 263 are provided. The processing control portion 263 is formed of a microcomputer.

[0134] The oscillator 251 generates an alternating-current signal of a frequency f0. Also, the oscillator 251 supplies the generated alternating-current signal to the current driver 252 and the synchronous detector 259. The current driver 252 converts the alternating-current signal supplied from the oscillator 251 into a current, and sends it out to the switching connection circuit 253. The switching connection circuit 253 switches the connection target (the transmission-side terminal T, the reception-side terminal R) to which the loop coil selected by the selection circuit 243 is connected, according to the control from the processing control section 263. Among the connection targets, the current driver 252 is connected to the transmission-side terminal T, and the reception amplifier 254 is connected to the reception-side terminal R.

[0135] The induced voltage generated in the loop coil selected by the selection circuit 243 is transmitted to the reception amplifier 254 via the selection circuit 243 and the switching connection circuit 253. The reception amplifier 254 amplifies the induced voltage supplied from the loop coil, and sends it out to the detector 255 and the synchronous detector 259.

[0136] The detector 255 detects the induced voltage generated in the loop coil, that is, the reception signal, and sends it out to the low-pass filter 256. The low-pass filter 256 has a cut-off frequency sufficiently lower than the aforementioned frequency f0, converts the output signal of the detector 255 into a direct-current signal, and sends it out to the sample-and-hold circuit 257. The sample-and-hold circuit 257 holds the voltage value of the output signal of the low-pass filter 256 at a predetermined timing, specifically, a predetermined timing in the reception period, and sends it out to the A / D (Analog to Digital) conversion circuit 258. The A / D conversion circuit 258 converts the analog output of the sample-and-hold circuit 257 into a digital signal, and outputs it to the processing control section 263.

[0137] On the other hand, the synchronous detector 259 performs synchronous detection on the output signal of the reception amplifier 254 using the alternating-current signal from the oscillator 251, and sends out a signal of a level corresponding to the phase difference between them to the low-pass filter 260. The low-pass filter 260 has a cut-off frequency sufficiently lower than the frequency f0, converts the output signal of the synchronous detector 259 into a direct-current signal, and sends it out to the sample-and-hold circuit 261. The sample-and-hold circuit 261 holds the voltage value of the output signal of the low-pass filter 260 at a predetermined timing, and sends it out to the A / D (Analog to Digital) conversion circuit 262. The A / D conversion circuit 262 converts the analog output of the sample-and-hold circuit 261 into a digital signal, and sends it out to the processing control section 263.

[0138] The processing control section 263 controls each section of the position detection device 202. That is, the processing control section 263 controls selection of the loop coils in the selection circuit 243, switching of the switch connection circuit 253, timing of the sample-and-hold circuits 257, 261. The processing control section 263 causes the electric wave to be transmitted from the X-axis direction loop coil group 241 and the Y-axis direction loop coil group 242 for a constant transmission duration, based on the input signal from the A / D conversion circuit 258, 262.

[0139] In each loop coil of the X-axis direction loop coil group 241 and the Y-axis direction loop coil group 242, an induced voltage is generated according to the electric wave transmitted from the electronic pen 1. The processing control section 263 calculates the coordinate value of the indicated position of the electronic pen 1 in the X-axis direction and the Y-axis direction, based on the level of the voltage value of the induced voltage generated in each loop coil. Further, the processing control section 263 detects the pen pressure based on the level of the signal corresponding to the phase difference (frequency offset) of the transmitted electric wave and the received electric wave. Further, the processing control section 263 detects whether the side switch 104 is in the on state or the off state, based on the level of the signal corresponding to the phase difference (frequency difference) of the transmitted electric wave and the received electric wave.

[0140] [Other Embodiments]

[0141] The above is the case where the present application is applied to the electronic pen of the electromagnetic induction type. However, the present application can also be applied to an active electrostatic pen which is an example of the electronic pen of the electrostatic capacity type. In the electronic pen of the example of the active electrostatic pen described below, the coil wound around the ferrite core becomes a part of a charging circuit which charges a power source of a signal transmission circuit possessed by the active electrostatic pen.

[0142] Figure 11 is a drawing showing a circuit structure example of the electronic pen IB which represents the structure of the example of the active electrostatic pen. In the electronic pen IB of the structure of the active electrostatic pen, the core 3B becomes a structure of an electrode core composed of a hard resin into which a conductor such as a conductive metal or a conductive powder is mixed. In the description below, the core 3B will be referred to as the electrode core 3B.

[0143] Furthermore, although the illustration is omitted, in this electronic pen 1B, the blocking layer 822 of the pen pressure transmission member 82 is made of a conductive component, and the pressing member 7 is also made of a conductive component. Furthermore, an insulating film for insulating against the pen pressure transmission member 82 is formed on the surface of the conductive elastomer 833 of the pressure-sensitive part 83 corresponding to the blocking layer 822. Also, on the support 84 of the pen pressure detection part 81, a terminal member, similarly configured as a three-dimensional fine pattern, is formed, such that it is electrically connected to the blocking layer 822. The blocking layer 822 is configured to be electrically connected to the terminal member when the pen pressure transmission member 82 and the pen pressure detection part 81 are engaged.

[0144] Furthermore, a signal transmitting circuit (IC) supplying the electrode core 3B is provided on the substrate surface 10a of the printed circuit board 10, and a connecting portion 842 forming the support 84 of the pen pressure detection unit 81 is provided, so that the terminal member electrically connected to the blocking layer 822 and the signal transmitting circuit are electrically connected.

[0145] In this example, such as Figure 11 As shown, the electronic circuit formed on the printed circuit board 10 has a circuit structure including the signal transmitting circuit 301 described above, a double-layer capacitor 302 (as an example of an energy storage element that generates a drive voltage (power supply voltage) for driving the signal transmitting circuit 301), a rectifier diode 303, and a voltage conversion circuit 304. In this example, the signal transmitting circuit 301 is composed of an oscillation circuit.

[0146] Similar to the embodiment described above, the electrode core 3B is inserted through the through hole 52a of the ferrite core 52 of the coil member 5 and fitted into the conductive pressing member 7 within the pen pressure transmission member 82 of the pen pressure detection module 8, thereby pressing the conductive blocking layer 822 via the conductive pressing member 7. Furthermore, as previously described, the electrode core 3B is electrically connected to the signal transmission circuit 301 of the printed circuit board.

[0147] And, as Figure 11 As shown, the two terminal components 843 and 844 of the pen pressure detection module 8 are electrically connected to the signal transmission circuit 301 formed on the printed circuit board. The oscillation circuit constituting the signal transmission circuit 301 generates a signal whose frequency changes according to the capacitance of the variable capacitor 83BC of the pressure-sensitive section 83 of the pen pressure detection unit 81, and supplies this generated signal to the electrode core 3B. Furthermore, the signal transmission circuit 301 generates a signal whose frequency changes according to the on / off state of the side switch 104, and supplies this generated signal to the electrode core 3B.

[0148] The electronic pen 1B of this example, when attached to a charger not shown, generates an induced electromotive force in the coil 51 according to an alternating magnetic field generated by the charger, and charges the electric double layer capacitor 302 via the diode 303. The voltage conversion circuit 304 converts the voltage accumulated in the electric double layer capacitor 302 into a constant voltage, and supplies it as a power source for the signal transmission circuit 301.

[0149] When the electronic pen 1B as the electrostatic type stylus of this example is normally operated (not performing a charging operation), the coil 51 functions as a shield electrode provided around the electrode core 3B because it becomes a fixed potential (in this example, a ground potential (GND)). Note that the fixed potential of the coil 51 when the electrostatic type stylus is normally operated is not limited to the ground potential, and can be a positive potential of a power source, or a potential intermediate between the positive potential of the power source and the ground potential.

[0150] The signal transmission circuit (oscillation circuit) 301 generates a signal whose frequency changes according to the capacitance of the capacitance-variable capacitor 83BC constituted by the pressure-sensitive portion 83 of the pen pressure detection portion 81, or a signal whose frequency changes according to the on / off of the side switch 104, and supplies the generated signal to the electrode core 3B. The signal from the signal transmission circuit 301 is radiated from the electrode core 3B as an electric field based on the signal. The oscillation circuit constituting the signal transmission circuit 301 is constituted by, for example, an LC oscillation circuit using resonance of a coil and a capacitor. In the position detection device that detects the coordinate position of the electrostatic type stylus of the example of the electronic pen 1B of this embodiment, the pen pressure applied to the electrode core 3B can be found according to the frequency of the signal.

[0151] Figure 12 is a block diagram for explaining a position detection device 400 that receives a signal from the electronic pen 1B as a structure of an electrostatic type stylus, detects a position on a sensor, and detects a pen pressure.

[0152] As shown in Figure 12 , the position detection device 400 of this embodiment is constituted by a sensor 410 and a pen detection circuit 420 connected to the sensor 410. The sensor 410, in this example, omits a cross-sectional view, but is formed by stacking a first conductor group 411, an insulating layer (omitted from the drawing), and a second conductor group 412 in this order from the lower layer side. The first conductor group 411, for example, arranges a plurality of first conductors 411Y1, 411Y2,..., 411Y m (m is an integer of 1 or more) in parallel at a predetermined interval in the Y-axis direction.

[0153] Further, the second conductor group 412 arranges a plurality of second conductors 412X1, 412X2,..., 412X ma plurality of second conductors 412X1, 412X2,..., 412X extending in a direction intersecting with the extending direction of the first conductors 411, in this case, a longitudinal direction (Y-axis direction) orthogonal thereto n (n is an integer of 1 or more) are arranged in parallel at a predetermined interval in the X-axis direction.

[0154] Thus, in the sensor 410 of the position detection device 400, a configuration is provided in which the position indicated by the electronic pen 1B is detected using a sensor pattern formed by the first conductor group 411 and the second conductor group 412 intersecting with each other.

[0155] In the following description, with respect to the first conductors 411Y1, 411Y2,..., 411Y m When it is not necessary to distinguish each conductor, the conductor is referred to as the first conductor 411Y. Similarly, with respect to the second conductors 412X1, 412X2,..., 412X n When it is not necessary to distinguish each conductor, the conductor is referred to as the second conductor 412X.

[0156] The pen detection circuit 420 is composed of a selection circuit 421 that becomes an input / output interface with the sensor 410, an amplification circuit 422, a band pass filter 423, a detection circuit 424, a sample-and-hold circuit 425, an AD (Analog to Digital) conversion circuit 426, and a control circuit 427.

[0157] The selection circuit 421 selects one conductor 411Y or 412X from the first conductor group 411 and the second conductor group 412, respectively, based on a control signal from the control circuit 427. The conductor selected by the selection circuit 421 is connected to the amplification circuit 422, and a signal from the electronic pen 1B is detected through the selected conductor and amplified by the amplification circuit 422. The output of the amplification circuit 422 is supplied to the band pass filter 423, and only a component of the frequency of the signal transmitted from the electronic pen 1B is extracted.

[0158] The output signal of the band pass filter 423 is detected by the detection circuit 424. The output signal of the detection circuit 424 is supplied to the sample-and-hold circuit 425, and after sample-and-hold at a predetermined timing according to a sampling signal from the control circuit 427, is converted to a digital value by the AD conversion circuit 426. The digital data from the AD conversion circuit 426 is read by the control circuit 427 and processed.

[0159] The control circuit 427 acts in accordance with a program stored in a ROM inside to send out control signals to the sample-and-hold circuit 425, the AD conversion circuit 426, and the selection circuit 421, respectively. Also, the control circuit 427 calculates the position coordinates on the sensor 410 indicated by the electronic pen 1B from digital data from the AD conversion circuit 426, and detects the pen pressure detected in the pen pressure detection module of the electronic pen 1B.

[0160] As a flow of actions, the control circuit 427 supplies a selection signal to the selection circuit 421 to select the second conductor 412X, respectively, to read data output from the AD conversion circuit 426 as signal levels.

[0161] In a case where a signal of a level of a predetermined value or more is detected from any of the second conductors 412X, the control circuit 427 stores the number of the second conductor 412X that detected the highest signal level and a plurality of second conductors 412X in the vicinity thereof. Also, the control circuit 427 controls the selection circuit 421 to store the number of the first conductor 411Y that detected the largest signal level in the first conductor 411Y and a plurality of first conductors 411Y in the vicinity thereof.

[0162] Also, the control circuit 427 detects the position on the sensor 410 indicated by the electronic pen 1B from the number of the second conductor 412X and the number of the first conductor 411Y stored as above.

[0163] The control circuit 427 also detects the frequency of the signal from the AD conversion circuit 426, and detects the pen pressure value detected in the pen pressure detection section 81 of the electronic pen 1B from the detected frequency. That is, as described above, the oscillation frequency of the oscillation circuit that constitutes the signal transmission circuit 301 of the electronic pen 1B becomes a frequency corresponding to the electrostatic capacity of the variable capacitor 83BC constituted by the pressure-sensitive section 83 of the pen pressure detection section 81. The control circuit 427 has information of a correspondence table of the oscillation frequency of the oscillation circuit that constitutes the signal transmission circuit 301 of the electronic pen 1B and the pen pressure value, for example, and detects the pen pressure value from the information of the correspondence table.

[0164] In addition, in the example described above, the electronic pen 1B converts the pen pressure detected in the pressure-sensitive section 83 of the pen pressure detection section 81 into a frequency to supply to the electrode core 3B, but as a signal attribute to which the pen pressure corresponds, it is not limited to a frequency, and the pen pressure can also correspond to the phase of a signal or the number of times of interruption of a signal, and the like.

[0165] Further, in the active stylus structure electronic pen 1B of the above example, the coil 51 wound around the ferrite core is provided as a charging coil, but a battery (storage battery) can be built in as a power supply for the signal transmission circuit 301. In this case, the ferrite core with the coil wound around it is not needed. Also in this case, instead of the coil member, a hollow cylindrical body that constitutes a shield electrode for the electrode core 3B can be provided, and the cylindrical body is fitted to the pen pressure transmission member 82 via a fixing member for the cylindrical body.

[0166] Further, in the active stylus structure electronic pen 1B of the above example, the signal transmission circuit 301 is configured as an oscillation circuit, and the pen pressure is transmitted to the position detection device as a change in the oscillation frequency, but the signal transmission circuit can be configured by an oscillation circuit and a circuit that performs predetermined modulation on the oscillation signal of the oscillation circuit, and the pen pressure information is transmitted to the position detection device as an ASK signal or the like, for example.

[0167] [Other Embodiments or Variations]

[0168] In the above embodiment, the housing 2 is an external case of the electronic pen, but the above housing 2 can be a housing (case) of an electronic pen cartridge housed in the external case of the electronic pen. In this case, the electronic pen cartridge ensures waterproofness and dustproofness, and a sealing structure related to waterproofness and dustproofness of the external case of the electronic pen is not needed. Also in the case of the structure as an electronic pen cartridge, the electronic pen cartridge can be configured as a knock-type replacement core, and in this case, the end portion of the housing (case) of the electronic pen cartridge on the side opposite to the pen tip side is configured as a fitting portion that is fitted to a knocking mechanism.

[0169] In the above embodiment, the capacitance variable capacitor configured by the pressure-sensitive portion of the pen pressure detection portion is not limited to the capacitor with the configuration structure in which a plurality of components are combined as in the above example, but can be configured by using one component of a semiconductor element that changes an electrostatic capacitance according to pen pressure, disclosed in Japanese Patent Application Publication No. 2013-161307, for example.

[0170] Further, in the above embodiment, the pressure-sensitive portion of the pen pressure detection portion uses a capacitance variable capacitor that changes an electrostatic capacitance according to pen pressure, but it is of course possible to use a capacitor that changes an inductance value or a resistance value as a change element that changes a resonance frequency of a resonance circuit.

[0171] Explanation of Reference Numerals

[0172] 1…electronic pen, 2…housing (case), 21…housing cover, 3…core, 4…cover member, 5…coil member, 51…coil 51…ferrite core, 6…coil member support, 7…pressing member, 8…pen pressure detection module, 9…substrate support, 10…printed circuit substrate, 81…pen pressure detection portion, 82…pen pressure transmission member, 83…pressure sensitive portion, 84…support, 822…barrier layer, 93…sealing member, 110…resin molded member.

Claims

1. An electronic pen, characterized in that, have: case; An opening is formed on one side of the housing; A core that protrudes to the outside of the housing through the opening; A pen pressure detection unit that detects the pen pressure applied to the core during operation; as well as A core insertion member is disposed within the housing and has a hollow space for accommodating the core. The hollow space includes a hollow portion located between the core insertion member and the core when the core is accommodated by the core insertion member. This hollow portion communicates with a first space outside the electronic pen via an opening, and is separated from a second space, in which the pen pressure detection unit is disposed. The sealing member separates the hollow portion from the second space.

2. The electronic pen according to claim 1, wherein, The core insertion member has a blocking layer that separates the hollow portion from the second space, and the blocking layer is adjacent to the pen pressure detection portion.

3. The electronic pen according to claim 2, wherein, During operation, the blocking layer elastically displaces based on the movement of the core according to the pen pressure, thereby transmitting the pen pressure applied to the core to the pen pressure detection unit.

4. The electronic pen according to claim 2, wherein, The barrier layer is formed of an elastic member.

5. The electronic pen according to claim 1, wherein, The pen pressure detection unit is integrated into the core insertion member.

6. The electronic pen according to claim 2, wherein, A pressing member is fitted into one side of the core, and the core presses the blocking layer of the core insertion member via the pressing member according to the applied pen pressure.

7. An electronic pen, characterized in that, have: case; An opening is formed on one side of the housing; A core that protrudes to the outside of the housing through the opening; A pen pressure detection unit that detects the pen pressure applied to the core during operation; as well as A core insertion member is disposed within the housing and has a hollow space for accommodating the core. The hollow space includes a hollow portion located between the core insertion member and the core when the core is accommodated by the core insertion member. This hollow portion communicates with a first space outside the electronic pen via an opening, and is separated from a second space, in which the pen pressure detection unit is disposed. A sealing component is provided between the first space and the second space.

8. An electronic pen, characterized in that, have: case; An opening is formed on one side of the housing; A core that protrudes to the outside of the housing through the opening; A pen pressure detection unit that detects the pen pressure applied to the core during operation; as well as A core insertion member is disposed within the housing and has a hollow space for accommodating the core. The hollow space includes a hollow portion located between the core insertion member and the core when the core is accommodated by the core insertion member. This hollow portion communicates with a first space outside the electronic pen via an opening, and is separated from a second space, in which the pen pressure detection unit is disposed. The magnetic core houses the core body, and a sealing member is disposed on the magnetic core.

9. The electronic pen according to claim 8, wherein, The sealing member is a cap-shaped elastic member.

10. An electronic pen, characterized in that, have: case; An opening is formed on one side of the housing; A core that protrudes to the outside of the housing through the opening; Pen module component; as well as A core insertion member is disposed within the housing and has a hollow space for accommodating the core. The hollow space includes a hollow portion located between the inner circumferential surface of the core insertion member and the outer circumferential surface of the core when the core insertion member accommodates the core. The hollow portion communicates with a first space outside the electronic pen via an opening, and is separated from a second space. The pen module component is disposed within the second space inside the housing. The sealing member separates the hollow portion from the second space.

11. The electronic pen according to claim 10, wherein, The electronic pen also includes a pen pressure detection unit, which detects the pen pressure applied to the core during operation. The core insertion member has a blocking layer that separates the hollow portion from the pen pressure detection portion, and the blocking layer is adjacent to the pen pressure detection portion.

12. The electronic pen according to claim 11, wherein, During operation, the blocking layer elastically displaces based on the movement of the core according to the pen pressure, thereby transmitting the pen pressure applied to the core to the pen pressure detection unit.

13. The electronic pen according to claim 11, wherein, A pressing member is fitted into one side of the core, and the core presses the blocking layer of the core insertion member via the pressing member according to the pen pressure.

14. The electronic pen according to claim 10, wherein, The electronic pen also includes a pen pressure detection unit that detects the pen pressure applied to the core during operation, and the pen pressure detection unit is coupled to the core insertion member.

15. An electronic pen, characterized in that, have: case; An opening is formed on one side of the housing; A core that protrudes to the outside of the housing through the opening; Pen module component; as well as A core insertion member is disposed within the housing and has a hollow space for accommodating the core. The hollow space includes a hollow portion located between the inner circumferential surface of the core insertion member and the outer circumferential surface of the core when the core insertion member accommodates the core. The hollow portion communicates with a first space outside the electronic pen via an opening, and is separated from a second space. The pen module component is disposed within the second space inside the housing. A sealing component is provided between the first space and the second space.

16. An electronic pen, characterized in that, have: case; An opening is formed on one side of the housing; A core that protrudes to the outside of the housing through the opening; Pen module component; as well as A core insertion member is disposed within the housing and has a hollow space for accommodating the core. The hollow space includes a hollow portion located between the inner circumferential surface of the core insertion member and the outer circumferential surface of the core when the core insertion member accommodates the core. The hollow portion communicates with a first space outside the electronic pen via an opening, and is separated from a second space. The pen module component is disposed within the second space inside the housing. The magnetic core houses the core body, and a sealing member is disposed on the magnetic core.

17. The electronic pen according to any one of claims 10, 15, and 16, wherein, The pen module component includes a coil.

18. The electronic pen according to claim 17, wherein, The pen module component also includes a ferrite core, and the coil is wound around the ferrite core.

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