Electronic pen

Abstract

To provide an electronic pen with enhanced strength that is thin but does not bend or break.SOLUTION: An electronic pen comprises a protection member (a rod-shaped housing component) 6 having a side wall formed in a cylinder shape surrounding a circuit board. The electronic pen further comprises a stroke pressure detection portion 31 which is not surrounded by the protection member 6 when the circuit board 4 is surrounded by the protection member 6, the stroke pressure detection portion 31 being electrically connected to the circuit board 4 surrounded by the protection member 6. The circuit board 4, the protection member 6, and the stroke pressure detection portion 31 are housed in a housing 11, thus resulting in the electronic pen.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an electronic pen, which is a pen-type position indicator used together with a position detection device. [Background technology]

[0002] The electronic pen is held by a user and used to indicate a position on a sensor of a position detection device. The position indicated on the sensor by the electronic pen is detected by the position detection device by transmitting and receiving position detection signals between the electronic pen and the sensor by various coupling methods such as electromagnetic induction coupling method and electrostatic capacitance coupling method. An example of an input device composed of an electromagnetic induction type coordinate detection sensor and an electronic pen is disclosed in Patent Document 1 described later, and an example of an input device composed of an electrostatic capacitance type coordinate detection sensor and an electronic pen is disclosed in Patent Document 2 described later. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 07-044304 [Patent Document 2] Japanese Patent Application Publication No. 07-295722 Summary of the Invention [Problem to be solved by the invention]

[0004] Electronic pens used in electromagnetic induction coupling type and electrostatic capacitance coupling type position detection devices are configured with a circuit board, a battery, etc. For this reason, conventional electronic pens have been thicker than general writing implements such as ballpoint pens and fountain pens. However, with the miniaturization and thinning of electronic devices such as so-called tablet PCs (Personal Computers) and high-performance mobile phone terminals called smartphones, which are equipped with position detection devices, there has been a demand for thinner electronic pens.

[0005] In response to this trend, the chipping of capacitors and the like on the circuit board built into the electronic pen, the miniaturization of the pen pressure detection unit, and other such efforts are being promoted, and the electronic pens are also becoming thinner. However, as the electronic pens become thinner, the thickness of the outer casing of the electronic pens also becomes thinner, raising concerns that the strength of the electronic pens may decrease, such as making them more likely to bend or break. Thus, there is a demand for technology to increase the strength of electronic pens as they become thinner.

[0006] In view of the above, an object of the present invention is to provide an electronic pen that has increased strength so that it will not bend or break even if it is made thin. [Means for solving the problem]

[0007] In order to solve the above problems, An electronic pen having a rod-shaped housing, a pen tip located at the tip of the electronic pen; A writing pressure sensor that detects a writing pressure applied to the pen tip; a rod-shaped storage component that is on a first side of the writing pressure sensor on the axis of the rod-shaped housing, the second side of the writing pressure sensor being different from the first side on which the pen tip is located, and that does not store the writing pressure sensor; an electronic component housed in the rod-shaped housing component; The rod-shaped housing houses the rod-shaped housing part that houses the pen pressure sensor and the electronic parts. The present invention provides an electronic pen. Effect of the Invention

[0008] According to the present invention, it is possible to realize an electronic pen having increased strength so that it will not bend or break even if it is made thin. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram for explaining an overview of an embodiment of an electronic pen according to the present invention; [Diagram 2] FIG. 2 is an exploded perspective view illustrating the internal configuration of the embodiment of the electronic pen according to the present invention. [Diagram 3] 1 is a cross-sectional view of a portion of an electronic pen according to an embodiment of the present invention in which a core body, a coil portion, a pressure detection portion, a circuit board, and a board protection pipe are connected together. [Figure 4] 11A and 11B are diagrams for explaining a state in which a circuit board is stored in a board protection pipe in the electronic pen according to the embodiment of the present invention. [Diagram 5] 2 is a block diagram showing an example of a circuit configuration of an electronic pen and a position detection device according to the embodiment; [Figure 6] 1A to 1C are diagrams for explaining an electronic pen cartridge configured using an electronic pen main body of an embodiment. [Figure 7] 11 is a diagram for explaining an example in which an electronic pen cartridge is used in the housing of a multi-color ballpoint pen. FIG. [Figure 8] 13 is a diagram for explaining an example in which a pen pressure detection unit is provided on the opposite side to the core body. FIG. [Figure 9] FIG. 11 is a cross-sectional view for explaining an example in which the present invention is applied to a main body of an electronic pen of a capacitive coupling type. [Figure 10] FIG. 1 is a block diagram for explaining a position detection device in which a capacitive coupling type coordinate detection sensor is used. [Figure 11] 13A and 13B are diagrams for explaining modified examples of the substrate protection pipe. [Figure 12] 11A and 11B are diagrams for explaining an example in which a terminal for a switch is formed on a circuit board. [Figure 13] 1A and 1B are diagrams for explaining a schematic configuration of a sliding member for switching a switch. [Figure 14] 1A and 1B are diagrams illustrating an example of the configuration of a switch that utilizes a knock mechanism of a ballpoint pen. [Figure 15] 13A and 13B are diagrams illustrating other configuration examples of the connection portion. [Figure 16] 16 is a diagram showing an example of an equivalent circuit of the electronic pen when the connection portion of FIG. 15 is used. [Figure 17] 11A to 11C are diagrams for explaining examples of substrate protection pipes having different shapes. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic pen according to the present invention will now be described with reference to the drawings. First, an embodiment in which the present invention is applied to an electromagnetic induction type electronic pen will be described.

[0011] [Electronic pen configuration] Fig. 1 is a diagram for explaining an example of the configuration of an electronic pen according to an embodiment of the present invention, and for explaining an overview of the entire electronic pen 10 of this embodiment. In Fig. 1, a housing (case) 11 of the electronic pen 10 of this embodiment is cut away to show its inside.

[0012] The electronic pen 10 of this embodiment is configured by housing an electronic pen main body 8 in a housing 11. As shown in Fig. 1, the electronic pen main body 8 is a part that includes a core body 1, a coil section 2, a connection section (connection member) 3, and a circuit board 4, a board protection pipe (hard tubular member) 6 provided around the circuit board 4, and further, an end of the board protection pipe 6 opposite to the core body 1 side is closed with a pipe cover 7.

[0013] Fig. 2 is an exploded perspective view for explaining the configuration of the electronic pen main body 8. The coil 2 is formed by winding an insulated electric wire (coated conductor wire) around a cylindrical ferrite 21. As shown in Fig. 2(A), ferrite portions on both sides in the axial direction of the coil 2 are provided where no coated conductor wire is wound.

[0014] As shown in Fig. 1 and Fig. 2(A), the connection part 3 is roughly divided into a writing pressure detection part 31, a fitting part 32, and a connection terminal part 33. The writing pressure detection part 31 is made of resin or the like and is cylindrical, and the outer circumference and shape of the end face on the coil part 2 side are almost the same as the outer circumference and shape of the part of the coil part 2 around which the coil is wound. The end face of the writing pressure detection part 31 facing the coil part 2 is provided with a recess into which the ferrite part of the coil part 2 around which the coated conductor wire is not wound fits. In addition, the inside of the writing pressure detection part 31 is provided with a member for holding the core body 1 and a pressure-sensing part for detecting the writing pressure applied to the core body 1, as described later.

[0015] The fitting portion 32 is a portion that fits with the board protection pipe 6 described later. The fitting portion 32 is formed, for example, in a substantially cylindrical shape using resin or hard rubber, and is firmly fitted to the pen pressure detection portion 31 to form an integrated unit. Although not shown, a recess is provided inside the fitting portion 32 into which a protrusion 4a of the circuit board 4 described later fits. The outer diameter of the fitting portion 32 is slightly longer than the inner diameter of the board protection pipe 6, so that the board protection pipe 6 can be firmly fitted. When the board protection pipe 6 is fitted into the fitting portion 32, the outer circumference of the board protection pipe 6 coincides with the outer circumference of the pen pressure detection portion 31. That is, the outer diameter of the coil portion 2, the outer diameter of the pen pressure detection portion 31, and the outer diameter of the board protection pipe 6 are substantially the same. The end portion of the fitting portion 32 opposite the core body 1 is provided with an inclined portion whose outer circumference is shorter than the inner circumference of the board protection pipe 6 in order to make it easier to insert the board protection pipe 6.

[0016] As shown in Fig. 2(A), the connection terminal portion 33 has two upper and lower plate portions connected to the fitting portion 32. These plate portions are configured to sandwich the circuit board 4 described below. In this case, the distance between the two upper and lower plate portions is slightly narrower than the thickness of the circuit board 4, so that the circuit board 4 can be sandwiched. One of these two plate portions is provided with terminals 33a and 33b to which signal lines from the terminal members of the pressure-sensing components of the pen pressure detection portion 31 are connected, as shown in Figs. 1 and 2(A).

[0017] The circuit board 4 is formed by mounting terminals 41a, 41b and various circuit components on a rectangular insulating board having projections 4a, 4b on both axial ends, and providing wiring to connect them. The various circuit components include an IC (Integrated Circuit) 42 that functions as a control circuit, a side switch 43, and capacitors 44 to 49. The circuit board 4 is housed and protected inside a board protection pipe 6, as shown in Figs. 1 and 2.

[0018] Ideally, as shown in Fig. 2(C), the circuit board 4 is stored in the board protection pipe 6 so that the axis O of the board protection pipe 6 and the axis of the circuit board 4 are substantially aligned. In this case, the circuit board 4 is ideally formed so that the diagonal of a cross section perpendicular to the axis, excluding the protrusions 4a and 4b provided at both ends in the axial direction, is the same as the inner diameter of the board protection pipe 6. However, in order to make it easier to store the circuit board 4 in the board protection pipe 6, the diagonal of a cross section perpendicular to the axial direction, as shown by the dotted line in Fig. 2(C), is made slightly shorter than the inner diameter of the board protection pipe 6.

[0019] The substrate protection pipe 6 is made of metal, carbon material, synthetic resin, etc., and is a hard tubular member that is difficult to break or bend. As shown in FIG. 2(B), the substrate protection pipe 6 has a core body side opening 61 and a rear end side opening 62 at both ends. The core body side opening 61 and the rear end side opening 62 are openings in a direction intersecting the axial direction. A predetermined range of the inner part of the substrate protection pipe 6 from the core body side opening 61 becomes the core body side fitting part 61a into which the fitting part 32 of the connection part 3 is inserted and fitted. Similarly, a predetermined range of the inner part of the substrate protection pipe 6 from the rear end side opening 62 becomes the rear end side fitting part 61b into which the pipe cover 7 described later is inserted and fitted.

[0020] 2(B), in this embodiment, the rear end fitting portion 62a is provided with a protrusion 62b that fits into a recess 7b of the pipe cover 7, which will be described later. As in the case of the rear end fitting portion 62a, the core body side fitting portion 61a may also be provided with a protrusion, and a matching recess may be provided in the fitting portion 32 of the connection portion 3. In this way, the fitting portion 32 of the connection portion 3 and the substrate protection pipe 6 can be fitted together more firmly.

[0021] Furthermore, the board protection pipe 6 has an opening (side opening in the direction along the axial center) 63 formed by cutting out a part of the side wall of the board protection pipe 6 so as to connect the core-side opening 61 and the rear-end side opening 62. In this case, even if the opening 63 is provided, the board protection pipe 6 is designed to have a side wall with an angular range of 180 degrees or more around the axial center. More specifically, as shown in FIG. 2(C), when the circuit board 4 is stored in the board protection pipe 6, the side wall of the board protection pipe 6 is left so that both long sides of the surface of the circuit board 4 facing the opening 63 contact the inner wall of the board protection pipe 6. That is, the width of the opening 63 in the direction perpendicular to the axial center is made narrower than the width of the portion of the circuit board 4 other than the protrusions 4a and 4b in the direction intersecting the axial center.

[0022] 2(B), the substrate protection pipe 6 has a notch 61b in a part of the core body side fitting portion 61a. Although not shown, this notch 61b fits with a protrusion provided on the fitting portion 32 of the connection portion 3, and when the substrate protection pipe 6 is fitted into the fitting portion 32, the position is restricted so that both do not rotate. Also, as shown in FIG. 2(B), the substrate protection pipe 6 has substrate receiving platform mounting holes 64a, 64b as substrate fixing portions for fixing the substrate.

[0023] As shown in Fig. 2(B), a trapezoidal board receiving stand 5 is attached to the board receiving stand mounting holes 64a, 64b of the board protection pipe 6. The surface of the board receiving stand 5 that is attached to the board protection pipe 6 is curved to correspond to the shape of the inner wall of the board protection pipe 6 as shown in Fig. 2(C), and is provided with fixing protrusions 51a, 51b that fit into the board receiving stand mounting holes 64a, 64b as shown in Fig. 2(B). The fixing protrusions 51a, 51b of the board receiving stand are fitted into the board receiving stand mounting holes 64a, 64b of the board protection pipe 6, whereby the board receiving stand 5 is fixed to the board protection pipe 6. The board receiving stand 5 is provided between the board protection pipe 6 and the circuit board 4 as shown in Fig. 2(C).

[0024] The board fixing portion can be used not only to attach the board receiving stand 5 but also to fix the board protection pipe to a workbench or the like. The board fixing portion is not limited to a mounting hole. For example, if a recess is provided in the board receiving stand 5, various modes can be adopted for fixing the board receiving stand 5 to the board protection pipe 6, such as a protrusion shape that fits into the recess or a hook shape that clamps the board receiving stand at the front and rear of the board receiving stand.

[0025] 2(B), a pipe lid 7 is provided to fit into the rear end fitting portion 62a of the board protection pipe 6. The pipe lid 7 has a fitting portion 7a that matches the inner diameter of the rear end fitting portion 62a of the board protection pipe 6, and the fitting portion 7a is provided with a recess 7b that matches the protrusion 62b provided on the rear end fitting portion 62a of the board protection pipe 6. A recess 7c into which the protrusion 4b of the circuit board 4 fits is provided inside the fitting portion 7a of the pipe lid 7. The end portion of the fitting portion 7a of the pipe lid 7 opposite the board protection pipe 6 has a diameter that matches the outer diameter of the board protection pipe 6 and forms a flange having a certain thickness.

[0026] The core 1 then penetrates the ferrite 21 of the coil portion 2, reaches the pen pressure detection portion 31 of the connection portion 3 that fits with the ferrite 21, and is held in the pen pressure detection portion 31. The circuit board 4 is inserted between the two plates of the connection terminal portion 33 of the connection portion 3. As a result, the protrusion 4a on the core side of the circuit board 4 fits into the recess of the fitting portion 32, and the circuit board 4 is sandwiched between the two plates of the connection terminal portion 33. The terminal 33a of the connection terminal portion 33 is connected to the terminal 41a of the circuit board 4, and the terminal 33b of the connection terminal portion 33 is connected to the terminal 41b of the circuit board 4.

[0027] The terminals 41a and 41b of the circuit board 4 are connected to an electronic circuit formed on the circuit board 4, which is composed of an IC 42, a side switch 43, capacitors 44 to 49, etc. This allows the IC 42 to detect the writing pressure and utilize it. Although not shown in FIG. 2, the extensions 23a and 23b from both ends of the coil of the coil unit 2 are also connected to the electronic circuit formed on the circuit board 4. This allows the coil 22 to form a resonance circuit together with the IC 42 and capacitors 44, 45, etc. of the circuit board 4, and allows signals to be exchanged between the electronic pen 10 of this embodiment and the position detection device, as will be described in detail later.

[0028] Fig. 3 is a cross-sectional view of the connection part when the core body 1, the coil part 2, the connection part 3, the circuit board 4, and the board protection pipe 6 are connected. In Fig. 3, the pen pressure detection part 31 of the connection part 3 is formed by providing a pressure-sensing part in, for example, a resin mold 31x. Then, as shown in Fig. 3, the ferrite 21 part where the coil 22 of the coil part 2 is not wound is fitted into the recess of the pen pressure detection part 31 of the connection part 3 and connected.

[0029] As shown in Fig. 3, the pressure-sensing parts of the pen pressure detection unit 31 are composed of a plurality of parts, namely, a dielectric 31a, a terminal member 31b, a holding member 31c, a conductive member 31d, and an elastic member 31e. The terminal member 31b is made of a conductive material and constitutes a first electrode of a variable capacitance capacitor composed of the pressure-sensing parts. The conductive member 31d is made of, for example, conductive rubber, and the elastic member 31e is made of a coil spring made of a conductive material. The conductive member 31d and the elastic member 31e are electrically connected to constitute a second electrode of the variable capacitance capacitor.

[0030] 3, the core 1 penetrates the cylindrical ferrite 21 of the coil portion 2, reaches the holding member 31c of the pen pressure detection portion 31, and is held there. This causes the capacitance of a variable capacitor (pressure-sensing member) formed between the terminal member 31b constituting the first electrode and the conductive member 31d constituting the second electrode to change in response to the pressure applied to the core 1. The change in capacitance of this variable capacitor is connected to the connection terminals 33a and 33b of the connection terminal portion 33 through a signal line.

[0031] Furthermore, as shown in FIG. 3, the protrusion 4a on the core side of the circuit board 4 is fitted into the fitting portion 32, and the circuit board 4 is connected so as to be sandwiched between the two plate portions of the connection terminal portion 33. As a result, as shown in FIG. 3, the connection terminal 33a of the connection terminal portion 33 is connected to the terminal 41a of the circuit board 4. Also, the connection terminal 33b of the connection terminal portion 33 is connected to the terminal 41b of the circuit board 4. As a result, as described above, the signal line from the terminal member of the pressure-sensing part of the pen pressure detection portion 31 is connected to the circuit board 4. Also, as shown in FIG. 3, the extension lines 23a and 23b from both ends of the coil portion 2 are connected to the circuit board 4, and as described above, a resonant circuit is formed with the capacitor 44 of the circuit board 4 and the like.

[0032] The circuit board 4 is then stored in the board protection pipe 6. In this case, the fitting portion 32 of the connection portion 3 and the core body side fitting portion 61a of the board protection pipe 6 are fitted together to prevent the connection portion 3 and the board protection pipe 6 from being separated. This allows the circuit board 4 to be protected by the board protection pipe 6 and prevents it from bending or breaking.

[0033] 4 is a diagram for explaining a state in which the circuit board 4 is housed in the board protection pipe 6. As shown in FIG. 4(A), the overall lengths of the board protection pipe 6 and the circuit board 4 are substantially the same. That is, the entire circuit board 4 can be housed in the board protection pipe 6. Furthermore, with the circuit board 4 housed in the board protection pipe 6, the side switch 43 can be operated through an opening 63 provided in the upper part of the board protection pipe 6 in FIG. 4(A).

[0034] As described above, the coil 22 of the coil unit 2 and the multiple capacitors 44 to 49 of the circuit board 4 are connected to form a resonant circuit, enabling signals to be exchanged with the position detection device. However, in terms of the capacitance of the resonant circuit, there are cases where it is not necessary to connect all of the capacitors. In such cases, a process of cutting (disconnecting) unnecessary capacitors with a laser or the like can be performed on the circuit board 4 through the opening 63.

[0035] Furthermore, when the circuit board 4 is stored in the board protection pipe 6, for example, from the core-side opening 61 of the board protection pipe 6, the underside of the tip of the circuit board 4 hits the inclined surface of the trapezoidal board receiving stand and is pushed up in the direction of the arrow, as shown in Fig. 4(B). As described above, the diagonal line of the cross section of the circuit board 4 in the axial direction is slightly shorter than the inner diameter of the board protection pipe 6. For this reason, the circuit board 4 is lifted up slightly by the board receiving stand 5, and both long sides of the surface of the circuit board 4 facing the opening 63 of the board protection pipe 6 are pressed against the inner wall of the board protection pipe 6.

[0036] As a result, the circuit board 4 is sandwiched between the board receiving stand 5 and the board protection pipe 6 and fixed inside the board protection pipe 6. When storing the circuit board 4 through the rear end opening 62, the circuit board 4 can be similarly sandwiched between the board receiving stand 5 and the board protection pipe 6. Furthermore, the pipe lid 7 is fitted into the rear end opening 62 of the board protection pipe 6, and the recess 7c of the pipe lid 7 fits into the protrusion 4b on the rear end side of the circuit board 4.

[0037] In this manner, the coil section 2 is fitted and fixed in a recess provided in the pen pressure detection section 31 of the connection section 3. The core 1 penetrating the ferrite of the coil section 2 reaches and is held by the holding member 31c of the pen pressure detection section 31. The circuit board 4 is fitted into a recess of the fitting section 32 of the connection section 3, and is further sandwiched and fixed between two plates of the connection terminal section 33. The circuit board 4 is fixed in the board protection pipe 6 by the action of the board receiving base 5 fixed in the board protection pipe 6, and is protected from external pressure. The board protection pipe 6 is fitted and fixed in the fitting section 32 of the connection section 3.

[0038] Furthermore, the pipe lid 7 is fitted into the rear end opening 62 of the board protection pipe 6, and the recess 7c of the pipe lid 7 fits into the protrusion 4b on the rear end side of the circuit board 4, holding the circuit board 4 inside the board protection pipe 6. As a result, the electronic pen main body 8 is formed in which the core body 1, the coil part 2, the connection part 3, the circuit board 4, the board receiving stand 5, the board protection pipe 6, and the pipe lid 7 are integrated. The electronic pen main body 8 thus formed is stored in the housing 11 as shown in FIG. 1, and the housing lid 12 is attached to form the electronic pen 10 used by the user. The pipe lid 7 and the housing lid 12 may be integrated. That is, the pipe lid 7 and the housing lid 12 can be integrated.

[0039] [Outline of the electromagnetic induction type coordinate detection sensor] Next, an example of the circuit configuration of a specific embodiment of a position detection device 200 of the electromagnetic induction transfer type that detects a pointed position and a writing pressure (detection) using the electronic pen 10 of the electromagnetic induction transfer type described with reference to Figures 1 to 4 will be described with reference to Figure 5. Figure 5 is a block diagram showing an example of the circuit configuration of the electronic pen 10 and the position detection device 200. The electronic pen 10 and the position detection device 200 constitute an input device.

[0040] The electronic pen 10 is configured as a resonant circuit consisting of a position indication coil 22, a pen pressure detection unit (including a variable capacitance capacitor as a pressure-sensing component) 31 connected to the position indication coil 22, and a resonant capacitor 44 connected in parallel to the pen pressure detection unit 31.

[0041] On the other hand, in the position detection device 200, an X-axis direction loop coil group 204a and a Y-axis direction loop coil group 204b are stacked to form an electromagnetic induction type coordinate detection sensor 201. Each of the loop coil groups 204a and 204b is composed of, for example, 40 rectangular loop coils. The loop coils constituting each of the loop coil groups 204a and 204b are arranged at equal intervals so as to overlap one another.

[0042] The position detection device 200 is also provided with a selection circuit 206 to which the X-axis direction loop coil group 204a and the Y-axis direction loop coil group 204b are connected. The selection circuit 206 sequentially selects one of the two loop coil groups 204a and 204b.

[0043] Furthermore, the position detection device 200 is provided with an oscillator 203, a current driver 205, a switching connection circuit 207, a receiving amplifier 208, a detector 209, a low-pass filter 210, a sample-and-hold circuit 212, an A / D conversion circuit 213, a synchronous detector 216, a low-pass filter 217, a sample-and-hold circuit 218, an A / D conversion circuit 219, and a processing unit 214.

[0044] Oscillator 203 generates an AC signal of frequency f0 and supplies it to current driver 205 and synchronous detector 216. Current driver 205 converts the AC signal supplied from oscillator 203 into a current and sends it to switching connection circuit 207. Switching connection circuit 207 switches the connection destination (transmission side terminal T, reception side terminal S) to which the loop coil selected by selection circuit 206 is connected under the control of processing unit 214 described later. Of these connection destinations, current driver 205 is connected to transmission side terminal T, and reception amplifier 208 is connected to reception side terminal R.

[0045] The induced voltage generated in the loop coil selected by the selection circuit 206 is sent to a receiving amplifier 208 via the selection circuit 206 and a switching connection circuit 207. The receiving amplifier 208 amplifies the induced voltage supplied from the loop coil and sends it to a detector 209 and a synchronous detector 216.

[0046] Detector 209 detects the induced voltage generated in the loop coil, i.e., the received signal, and sends it to low-pass filter 210. Low-pass filter 210 has a cutoff frequency sufficiently lower than the above-mentioned frequency f0, and converts the output signal of detector 209 into a DC signal and sends it to sample-and-hold circuit 212. Sample-and-hold circuit 212 holds the voltage value at a predetermined timing of the output signal of low-pass filter 210, specifically at a predetermined timing during the reception period, and sends it to A / D (Analog to Digital) conversion circuit 213. A / D conversion circuit 213 converts the analog output of sample-and-hold circuit 212 into a digital signal and outputs it to processing unit 214.

[0047] On the other hand, synchronous detector 216 synchronously detects the output signal of receiving amplifier 208 with the AC signal from oscillator 203, and sends a signal of a level corresponding to the phase difference therebetween to low-pass filter 217. This low-pass filter 217 has a cutoff frequency sufficiently lower than frequency f0, and converts the output signal of synchronous detector 216 to a DC signal and sends it to sample-and-hold circuit 218. This sample-and-hold circuit 218 holds a voltage value of the output signal of low-pass filter 217 at a predetermined timing, and sends it to A / D (Analog to Digital) conversion circuit 219. The A / D conversion circuit 219 converts the analog output of sample-and-hold circuit 218 into a digital signal, and outputs it to processing unit 214.

[0048] The processing unit 214 controls each unit of the position detection device 200. That is, the processing unit 214 controls the selection of the loop coil in the selection circuit 206, the switching of the switching connection circuit 207, and the timing of the sample and hold circuits 212 and 218. Based on input signals from the A / D conversion circuits 213 and 219, the processing unit 214 causes the X-axis loop coil group 204a and the Y-axis loop coil group 204b to transmit radio waves with a fixed transmission duration.

[0049] An induced voltage is generated in each loop coil of the X-axis direction loop coil group 204a and the Y-axis direction loop coil group 204b by the radio waves transmitted from the electronic pen 10. The processing unit 214 calculates the coordinate values ​​of the indicated position in the X-axis direction and the Y-axis direction of the electronic pen 10 based on the voltage value level of the induced voltage generated in each loop coil. The processing unit 214 also detects the writing pressure based on the phase difference between the transmitted radio waves and the received radio waves. In this way, an input device can be configured by the electronic pen 10 of this embodiment using the electromagnetic induction transfer method and the position detection device 200 of the electromagnetic induction transfer method shown in FIG.

[0050] [Cartridge-type electronic pen body] By using the electronic pen body 8 of this embodiment, for example, an electronic pen cartridge having the same shape as a replacement core (refill) of a ballpoint pen can be configured, and this can be attached, for example, to a ballpoint pen housing to configure an electronic pen. Fig. 6 is a diagram for explaining an electronic pen cartridge configured using the electronic pen body 8 of this embodiment.

[0051] Fig. 6(A) shows the electronic pen body 8 configured as described with reference to Figs. 1 to 4. Fig. 6(B) shows a cylindrical cartridge housing 8CT in which the electronic pen body 8 is housed. The cartridge housing 8CT has a small opening at the left end (core body side end) in Fig. 6(B) so that the tip part of the core body of the electronic pen body 8 protrudes. The cartridge housing 8CT also has an opening at the right end (rear end side end) in Fig. 6(B) for inserting the electronic pen body 8.

[0052] Then, as shown by the dotted arrow in Fig. 6, the electronic pen body 8 is stored in the cartridge housing 8CT from the opening at the rear end. Fig. 6(C) shows the appearance of the electronic pen cartridge 9 configured with the electronic pen body 8 stored in the cartridge housing 8CT. Note that Fig. 6(C) shows the case where the cartridge housing 8CT is made of transparent synthetic resin, and the inside can be seen.

[0053] In this example, as shown in FIG. 6(C), only the tip of the core 1 of the electronic pen body 8 protrudes from the opening at the core side end of the cartridge housing 8CT, and the other parts of the electronic pen body 8 are located inside the cartridge housing 8CT. The cartridge housing lid 8BK is fitted into the opening at the rear end of the cartridge housing 8CT to close it. As shown in FIG. 6(C), the cartridge housing lid 8BK in this example is provided with a recess for mounting it inside the ballpoint pen housing in the same manner as a refill for a ballpoint pen. The pipe lid 7 and the cartridge housing lid 8BK may be integrated. That is, the pipe lid 7 and the cartridge housing lid 8BK may be integrated.

[0054] As shown in FIG. 6(C), in this example of the electronic pen cartridge 9, the longitudinal length R1 and the width R2 perpendicular to the longitudinal direction both correspond to the length and width of the refill for the ballpoint pen in which it is attached.

[0055] As a result, an electronic pen to be used by a user can be configured by attaching the electronic pen cartridge 9 of this example formed by housing the electronic pen main body 8 in the cartridge housing 8CT into a housing (first housing) of a given ballpoint pen. That is, an electronic pen can be configured by an existing ballpoint pen housing and the electronic pen cartridge 9. As a result, a user-friendly electronic pen can be easily configured by utilizing the housing of a ballpoint pen that the user is accustomed to using.

[0056] In addition, when the electronic pen cartridge 9 is formed as explained with reference to Fig. 6, it can be used in place of a replacement lead attached to the housing of a multi-color ballpoint pen. Fig. 7 is a diagram for explaining an example of using the electronic pen cartridge in the housing of a multi-color ballpoint pen.

[0057] Fig. 7(A) is a configuration diagram showing the external appearance of electronic pen 10X of this example. In the example of Fig. 7(A), housing (first housing) 11M of electronic pen 10X is also made of transparent synthetic resin, and the inside is shown through the housing.

[0058] The housing 11M of the electronic pen 10X has the same configuration as the housing and knock cam mechanism of a commercially available knock-type multi-color ballpoint pen. The housing and knock cam mechanism of a commercially available knock-type multi-color ballpoint pen may be used as is. In this example, three electronic pen cartridges 9B, 9R, and 9E are stored in the housing 11M.

[0059] An opening 11Ma is formed on one end side in the axial direction of the housing 11M, and when any of the electronic pen cartridges 9B, 9R, 9E is slid in the axial direction by the knock mechanism, the tip of its core body 1 protrudes to the outside through this opening 11Ma.

[0060] When the electronic pen cartridges 9B, 9R, and 9E are not slid in the axial direction by the knock mechanism, as shown in Fig. 7(A), the entirety of each of the electronic pen cartridges 9B, 9R, and 9E, including the tip of each of the core bodies 1, is stored in the hollow portion of the housing 11M and is in a protected state. As described above, the tip of the core body 1 of the electronic pen cartridge that has been slid in the axial direction by the knock mechanism among the electronic pen cartridges 9B, 9R, and 9E is made to protrude to the outside through this opening 11Ma. Therefore, the protection of the electronic pen cartridge in which the tip of the core body 1 is made to protrude to the outside through the opening 11Ma by the knock mechanism is released.

[0061] Except for the fact that the cartridges 9B, 9R, and 9E for electronic pens are configured to have the same dimensions as refills for a multi-color ballpoint pen, the external appearance of the cartridges 9 for electronic pens described with reference to Fig. 6. However, in the cartridges 9B, 9R, and 9E for electronic pens in this example, as described below, cartridge housings 91B, 91R, and 91E (corresponding to the cartridge housing (second housing) 8CT in the figure) are provided with switch members that are turned on and off in response to axial movement by a knock mechanism.

[0062] In the electronic pen 10X of this example, as described later, a knock mechanism detects whether each of the electronic pen cartridges 9B, 9R, and 9E is protected in the electronic pen 10X depending on the state of the switches provided in the electronic pen cartridges 9B, 9R, and 9E. The other configurations of the electronic pen cartridges 9B, 9R, and 9E are the same as those of the electronic pen cartridge 9 described using Figures 1 to 4 and 6.

[0063] The knock mechanism of the electronic pen 10X consists of knock rods 19B, 19R, 19E having mating portions 19Ba, 19Ra, 19Ea into which the electronic pen cartridges 9B, 9R, 9E, respectively, are mated, a spring receiving member 17, and coil springs 18B, 18R, 18E arranged between the mating portions 19Ba, 19Ra, 19Ea of the electronic pen cartridges 9B, 9R, 9E and the spring receiving member 17.

[0064] The spring receiving member 17 is fixed and attached at a predetermined position in the axial direction within the hollow portion of the housing 11M. Through holes 17B, 17R, and 17E are formed in the spring receiving member 17, through which cartridge housings 91B, 91R, and 91E of the electronic pen cartridges 9B, 9R, and 9E are inserted. The electronic pen cartridges 9B, 9R, and 9E are attached to the electronic pen 10X by being inserted through the through holes 17B, 17R, and 17E of the spring receiving member 17 and the coil springs 18B, 18R, and 18E, respectively, and being fitted into fitting portions 19Ba, 19Ra, and 19Ea of the knock rods 19B, 19R, and 19E.

[0065] The housing 11M has a portion in which the knock bars 19B, 19R, and 19E are housed, and a through hole slit (not shown in FIG. 7A) is provided so that a portion of the knock bars 19B, 19R, and 19E is exposed to the outside and each of the knock bars 19B, 19R, and 19E can move in the axial direction.

[0066] Similar to well-known multi-color ballpoint pens, when any one of knock rods 19B, 19R, 19E is slid toward opening 11Ma and the tip of the core 1 of any one of electronic pen cartridges 9B, 9R, 9E fitted into that knock rod protrudes outward from opening 11Ma, the locking portion (not shown) of knock rod 19B, 19R, 19E engages with an engagement portion formed in the hollow portion of housing 11M, and the electronic pen 10X enters a locked state in which it is locked.

[0067] When another knock rod is slid toward opening 11Ma in this locked state, the locked knock rod is released and returns to its original state shown in Fig. 7(A) by one of coil springs 18B, 18R, and 18E. The knock rod that is slid later can be in a locked state with the tip of core 1 of one of electronic pen cartridges 9B, 9R, and 9E that is fitted to that knock rod protruding to the outside from opening 11Ma.

[0068] Similarly, by sliding the knock bars, the electronic pen cartridge whose tip protrudes from opening 11Ma can be changed. When the sliding movement of any of knock bars 19B, 19R, and 19E is stopped halfway to the locked state, the other locked knock bar is unlocked and that knock bar is returned to the protected state of FIG. 7(A) by one of coil springs 18B, 18R, and 18E.

[0069] 7B and 7C are diagrams for explaining the switches provided in the electronic pen cartridges 9B, 9R, and 9E. These figures show the switches provided in the electronic pen cartridge 9B, and the other electronic pen cartridges 9R and 9E have the same configuration.

[0070] That is, when the electronic pen cartridge 9B is engaged with the engaging portion 19Ba of the knock bar 19B in the unlocked state, a through hole (opening) 91Ba is provided on the peripheral surface of the portion of the cartridge housing 91B that is housed in the through hole 17B of the spring receiving member 17, and a switch member 50B is provided within the cartridge housing 91B so that a portion of it is exposed from this through hole 91Ba.

[0071] The switch member 50B is made of a material that is both elastic and conductive, for example, an elastic conductive metal. As shown in Figs. 7B and 7C, the switch member (switch portion) 50B is made of a fixed terminal piece (conductive member) 51 fixed to an inner wall surface in the vicinity of the through hole 91Ba of the cartridge housing 91B, and a movable terminal piece (elastic member) 52 that can elastically contact the fixed terminal piece 51. The movable terminal piece 52 has a bent portion 52a that is configured to be capable of being in elastic contact with the fixed terminal piece 51 and in a non-contact state, and is attached inside the cartridge housing 91B so that a part of the bent portion 52a can protrude from the through hole 91Ba.

[0072] When the electronic pen cartridge 9B is fitted into the fitting portion 19Ba of the knock bar 19B in the unlocked state and the entire electronic pen cartridge 9B is in the hollow portion of the housing 11M, the switch member 50B is located just inside the through hole 17B of the spring receiving member 17, as shown in Fig. 7(B). Therefore, the bent portion 52a of the movable terminal piece 52 is elastically displaced toward the inside of the cartridge housing 91B by the inner wall of the through hole 17B, and the fixed terminal piece 51 and the movable terminal piece 52 are separated from each other without contacting each other. In other words, the switch member 50B is in the OFF state.

[0073] When the knock bar 19B is slid to the locked state and the tip of the core 1 of the electronic pen cartridge 9B is in an unprotected state protruding from the opening 11Ma of the housing 11M, as shown in Fig. 7(C), the switch member 50B is released from the through hole 17B of the spring receiving member 17. Then, a part of the bent portion 52a of the movable terminal piece 52 is elastically displaced so as to protrude from the through hole 91Ba, whereby the movable terminal piece 52 and the fixed terminal piece 51 are in contact with each other. That is, the switch member 50B is in an ON state.

[0074] The fixed terminal piece 51 and the movable terminal piece 52 of this switch member 50B are electrically connected to an IC 42 on a circuit board 4 housed in a cartridge housing 91B. The IC 42 functions as a control circuit, and by monitoring the on / off state of this switch member 50B, detects whether the entire electronic pen cartridge 9B is in a protected state in which it is present in the hollow portion of the housing 11M, or whether the tip of the core body 1 of the electronic pen cartridge 9B is in an unprotected state in which it protrudes from the opening 11Ma of the housing 11M by the knock bar 19B.

[0075] Similarly, in the electronic pen cartridges 9R, 9E, switch members 50R, 50E (not shown) are provided in the cartridge housings 91R, 91E and are connected to the IC 42 of the circuit board 4 housed in the cartridge housings 91R, 91E. In this example, when the switch members 50B, 50R, 50E of the electronic pen cartridges 9B, 9R, 9E are turned on and in an unprotected state, the connections between the electronic components mounted on the circuit board 4 are turned on and function. This enables transmission and reception of signals to and from the position detection device.

[0076] In this embodiment, the position detection device used together with the electronic pen cartridges 9B, 9R, 9E has a function of receiving and distinguishing the identification information transmitted from each of the electronic pen cartridges 9B, 9R, 9E. That is, the position detection device in this embodiment distinguishes between the electronic pen cartridges 9B, 9R, 9E and realizes the functions assigned to each of the electronic pen cartridges 9B, 9R, 9E.

[0077] For example, the electronic pen cartridge 9B is assigned the function of displaying a trajectory (letters or figures) in black according to its designated position, the electronic pen cartridge 9R is assigned the function of displaying a trajectory in red according to its designated position, and the electronic pen cartridge 9E is assigned the function of erasing a trajectory previously input according to its designated position.

[0078] For this reason, the circuit board 4 mounted on each of the electronic pen cartridges 9B, 9R, 9E is equipped with an ID memory that stores the identification information of the electronic pen cartridges 9B, 9R, 9E, as well as information notifying the character color and information notifying the erase function. The IC 42 of the circuit board 4 mounted on each of the electronic pen cartridges 9B, 9R, 9E is capable of transmitting such information to the position detection device as necessary.

[0079] In addition, the functions assigned to the electronic pen cartridge may not only be the display color of the trajectory according to the indicated position as in this example, but may also be the thickness of the trajectory, the type of line to be displayed such as a solid line, a dotted line, or a dashed dotted line, etc.

[0080] In the above-described embodiment, the pen pressure detection unit is provided inside the core body side member, but this is not limited to this. The pen pressure detection unit can also be provided on the opposite side of the core body 1. Fig. 8 is a diagram for explaining an example in which the pen pressure detection unit is provided on the opposite side of the core body 1. Fig. 8(A) shows the overall configuration of the electronic pen main body 8A of this example.

[0081] As shown in Fig. 8(A), the electronic pen body 8A of this example has a core 1, a cylindrical coil portion 2A, and a cylindrical connection portion 34. The connection portion 34 has a fitting portion 34a that fits with the board protection pipe 6, and can also be connected to the circuit board 4 via this fitting portion 34a. The circuit board 4 and the board protection pipe 6 are similar to those of the electronic pen body 8 described with reference to Figs. 1 to 5.

[0082] Fig. 8(B) is a cross-sectional view of the connection between the components of the electronic pen body 8A of this example. As shown in Fig. 8(B), the coil section 2A is configured by winding a coated conductor wire 22B around a ferrite 21A having recesses on both ends in the axial direction. One recess provided in the ferrite 21A is for holding the core 1, and the other recess is for fitting with a protrusion of the connection section 34.

[0083] The connecting portion 34 is made of resin, hard rubber, or the like, and has a convex portion on one side in the axial direction that fits into the other concave portion of the ferrite 21A, and is provided on the other side with a fitting portion 34a that fits into the board protection pipe 6. This fitting portion 34a has an outer diameter that is slightly larger than the inner diameter of the board protection pipe 6, as in the case of the electronic pen main body 8 described above, but is smaller than the outer diameter of the board protection pipe 6.

[0084] When the board protection pipe 6 is fitted into the fitting portion 34a, the tip end face of the board protection pipe 6 is adapted to join with the end face of the connection portion 34 formed on the fitting portion 34a side of the connection portion 34. A recess is provided inside the fitting portion 34a of the connection portion 34, into which the protrusion 4a of the circuit board 4 fits. As shown in Fig. 8(B), this recess has a depth approximately equal to the axial length of the protrusion 4a of the circuit board 4.

[0085] Therefore, as shown in FIG. 8(B), the core 1 is fitted and fixed in one recess of the ferrite 21A, and the convex portion of the connection portion 34 is fitted and fixed in the other recess of the ferrite 21A. Furthermore, the protrusion portion 4a of the circuit board 4 is fitted and fixed in the recess provided in the fitting portion 34a of the connection portion 34. The circuit board 4 is stored in the board protection pipe 6, and the fitting portion 34a of the connection portion 34 is fitted and fixed in the core side opening 61 of the board protection pipe 6. The terminals 23A and 23B at both ends of the coil wound around the ferrite 21A are connected to the circuit board 4, and the capacitor 44 of the circuit board 4 and the like are connected to form a resonant circuit. In addition, the board support 5 is also provided in the board protection pipe 6, as in the case of the electronic pen main body 8 described above.

[0086] In the case of the electronic pen main body 8A of this example, the pen pressure detection unit 14 is provided at the rear end opposite to the core body 1 side. FIG. 8(C) is a cross-sectional view of the pen pressure detection unit 14. As shown in FIG. 8(C), the electronic pen main body 8A of this example is divided into a portion (first portion) on which the circuit board 4 is mounted, and a fixed portion 13 (second portion) to which a connecting rod member 141 is fixed. A pressure-sensing part 15 for detecting pen pressure is provided at the end of the circuit board 4 opposite to the core body 1 side. The pressure-sensing part 15 is pressed by the connecting rod member 141 fixed to the fixed portion 13.

[0087] A coil spring 142 is provided between a portion (first portion) on which the circuit board 4 is mounted and a fixed portion 13 (second portion) to which the connecting rod member 141 is fixed. This causes the first portion and the second portion to be elastically displaced away from each other in the axial direction. However, as shown in FIG. 8(C), a stopper 141b is provided inside the portion of the connecting rod member 141 on which the circuit board 4 is mounted, so that the first portion and the second portion are locked at a predetermined position and are not displaced any further in the axial direction.

[0088] The electronic pen body 8A thus configured is housed in the housing 11 as shown in Fig. 1 and used as an electronic pen, and the surface of the fixing part 13 opposite to the surface to which the connecting rod member 141 is fixed is fixed in contact with a locking wall provided inside the rear end of the housing 11. When writing pressure is applied to the core 1 of the electronic pen body 8A housed in the housing 11, the connected core 1, coil part 2A, connection part 34, circuit board 4, and board protection pipe 6 are all pushed up, and the tip 141a of the connecting rod member 141 presses the pressure-sensitive part 15. This allows the pressure-sensitive part 15 to detect the writing pressure and to supply a signal corresponding to the detected writing pressure to the IC 42 facing the circuit board 4.

[0089] [Application of capacitive coupling to electronic pens] Although the electronic pen body 8, 8A in the above-mentioned embodiment is of the electromagnetic induction transfer type, this invention can also be applied to the case where an electronic pen body of the electrostatic capacitive coupling type is configured. Fig. 9 is a cross-sectional view for explaining an example in which this invention is applied to an electronic pen body of the electrostatic capacitive coupling type, and shows the connection state of each component on the core body side.

[0090] 9, the electronic pen body 8B of this example is composed of a core 1A, a core holder 35, a connection portion 3, a circuit board 4, and a board protection pipe 6. As in the case of the electronic pen body 8 described above, the connection portion 3 is a portion composed of a pen pressure detection portion 31, a fitting portion 32, and a connection terminal portion 33. The pen pressure detection portion 31, the fitting portion 32, the connection terminal portion 33, the circuit board 4, and the board protection pipe 6 are all composed in the same way as in the case of the electronic pen body 8 described above, so detailed description thereof will be omitted.

[0091] In the case of the electronic pen main body 8B of this example, a core body holding part 35 is provided instead of the coil part 2. The core body holding part 35 is composed of a core body holder 35a, a conductive elastic member 35b, and a coil spring 35c as an elastic member. The core body 1A is fitted into the core body holder 35a made of a conductive material via the conductive elastic member 35b, and is connected and held by the core body holder 35a. As shown in FIG. 9, the core body holder 35a is fitted into a holding member 31c of the writing pressure detection part 31, so that the pressure (writing pressure) applied to the core body 1A is transmitted to a pressure-sensing component configured in the writing pressure detection part 31.

[0092] In this case, the core body holder 35a is configured to be constantly biased toward the core body 1A with respect to the writing pressure detection unit 31 by a coil spring 35c, which is an example of an elastic member made of a conductive material such as a conductive metal, provided between the core body holder 35a and the writing pressure detection unit 31. The coil spring 35c is connected to an electronic circuit made of an IC 42, a side switch 43, capacitors 44 to 49, etc., arranged on the circuit board 4 through a conductive terminal member 102. This allows a signal from the IC 42 to be transmitted to the core body 1A and then transmitted from the core body 1A to the position detection device.

[0093] Further, the signal lines from the terminal members of the pressure-sensing parts configured in the writing pressure detection unit 31 are connected to the connection terminals 33a and 33b of the connection terminal portion 33. As described above, the connection terminals 33a and 33b are connected to the terminals 41a and 41b of the circuit board 4 when the circuit board 4 is inserted into the fitting portion 32 and the connection terminal portion 33. The terminals 41a and 41b of the circuit board 4 are connected to an electronic circuit including the IC 42, the side switch 43, the capacitors 44 to 49, etc. of the circuit board 4, and the detection output from the pressure-sensing parts is supplied to the IC 42 of the circuit board 4 through the terminals 33a, 33b and the terminals 41a and 41b. This allows the IC 42 to detect the writing pressure and transmit a signal corresponding to the writing pressure to the position detection device through the core body 1A.

[0094] 9, the connection part 3 is connected to the circuit board 4 and the board protection pipe 6 in the same manner as in the case of the electronic pen body 8 described above. As a result, even in the case of the capacitive connection type electronic pen body 8B, the circuit board 4 can be protected by the board protection pipe 6. Moreover, the core 1A, the core holding part 35, and the connection part 3 can be firmly connected in series, so that a capacitive type electronic pen body 8B with high strength against external pressure can be constructed.

[0095] [Outline of capacitive coupling type position detection device] FIG. 10 is a block diagram for explaining a position detection device 300 that uses a capacitive coupling type coordinate detection sensor that receives a signal from an electronic pen 10Y configured using the electronic pen main body 8B shown in FIG. 9, detects a position on the sensor, and detects the pen pressure and the state of a side switch.

[0096] As shown in Fig. 10, the position detection device 300 of this example includes a capacitive coupling type coordinate detection sensor (hereinafter, abbreviated as sensor) 310 and a pen detection circuit 320 connected to the sensor 310. Although a cross-sectional view is omitted in this example, the sensor 310 is formed by stacking a first conductor group 311, an insulating layer (not shown), and a second conductor group 312 in order from the lower layer side. The first conductor group 311 is, for example, a plurality of first conductors 311Y1, 311Y2, ..., 311Ym (m is a positive integer) extending in the horizontal direction (X-axis direction) and arranged in parallel in the Y-axis direction with a predetermined distance between them. The second conductor group 312 is extended in the vertical direction (Y-axis direction) perpendicular to the first conductor group 311 and arranged in parallel in the X-axis direction with a predetermined distance between them.

[0097] In this way, the sensor 310 of the position detection device 300 is configured to detect a position indicated by an electronic pen using a sensor pattern formed by crossing the first conductor group 311 and the second conductor group 312. In the following description, when it is not necessary to distinguish between the first conductors 311Y1, 311Y2, ..., 311Ym, the conductors will be referred to as the first conductors 211Y. Similarly, when it is not necessary to distinguish between the second conductors 312X1, 312X2, ..., 312Xn, the conductors will be referred to as the second conductors 312X.

[0098] The pen detection circuit 320 includes a selection circuit 321 serving as an input / output interface with the sensor 310 , an amplifier circuit 322 , a bandpass filter 323 , a detection circuit 324 , a sample-and-hold circuit 325 , an AD (Analog to Digital) conversion circuit 326 , and a control circuit 327 .

[0099] The selection circuit 321 selects one conductor 311Y or 312X from the first conductor group 311 and the second conductor group 312 based on a control signal from the control circuit 327. The conductor selected by the selection circuit 321 is connected to an amplifier circuit 322, and a signal from the electronic pen 10Y is detected by the selected conductor and amplified by the amplifier circuit 322. The output of the amplifier circuit 322 is supplied to a band-pass filter 323, which extracts only the frequency component of the signal transmitted from the electronic pen 10Y.

[0100] The output signal of the bandpass filter 323 is detected by a detection circuit 324. The output signal of this detection circuit 324 is supplied to a sample-and-hold circuit 325, where it is sampled and held at a predetermined timing by a sampling signal from a control circuit 327, and then converted into a digital value by an AD conversion circuit 326. The digital data from the AD conversion circuit 326 is read and processed by the control circuit 327.

[0101] The control circuit 327 operates to send control signals to the sample-and-hold circuit 325, the AD conversion circuit 326, and the selection circuit 321, according to a program stored in the internal ROM. Then, the control circuit 327 calculates the position coordinates on the sensor 310 designated by the electronic pen 10Y from the digital data from the AD conversion circuit 326. Furthermore, the control circuit 327 detects the writing pressure detected by the writing pressure detection unit 31 composed of pressure-sensing parts of the electronic pen 10Y and the state of the side switch 43 of the electronic pen 10Y.

[0102] In this example of electronic pen 10Y, signal generating circuit 42X of IC 42 on circuit board 4 is configured only as an oscillator circuit, and transmits writing pressure and on / off of the side switch to the position detection device as changes in the oscillation frequency. However, this is not limited to this. The signal generating circuit may be configured with an oscillator circuit and a circuit that performs a predetermined modulation on the oscillation signal, and information indicating writing pressure and on / off of the side switch may be transmitted to the position detection device as, for example, an ASK signal.

[0103] [Modification of the PCB protection pipe] In the electronic pen main body 8, 8A, and 8B of the above-described embodiment, the substrate protection pipe 6 is provided with an opening 63 formed by cutting out a part of the side wall of the substrate protection pipe 6 so as to connect the core body side opening 61 and the rear end side opening 62, as described with reference to Fig. 2. The opening 63 is a side opening in the direction along the axial center, and can also be called a window or a notch provided on the side of the substrate protection pipe 6. However, the present invention is not limited to this.

[0104] 11A and 11B are diagrams for explaining modified examples of the substrate protection pipe 6. For example, the substrate protection pipe 6A of modified example 1 shown in FIG. 11A has an opening 63A formed by cutting out a part of the side wall of the substrate protection pipe 6 so as to connect the core body side opening 61 and the rear end side opening 62. However, as shown in FIG. 11A, the core body side opening 61 and the rear end side opening 62 may have a portion with a narrower width. This can make the fitting with the fitting portion 32 of the connection portion 3 and the fitting with the pipe cover 7 stronger.

[0105] 11B, the substrate protection pipe 6B of the second modification is provided with a minimum necessary opening 63B at a position where the side switch 43 of the circuit board 4 can be operated and the connection of the capacitor that constitutes the resonant circuit together with the coil can be cut off by a laser. The opening 63B is a so-called window portion, whose opening range is a closed range surrounded by the side of the substrate protection pipe 6B. The core side opening 61 and the rear end side opening 62 are provided with cutout portions 6Ba and 6Bb, which are openings whose opening range is an open range that is not surrounded by the side of the substrate protection pipe 6B. The cutout portions 6Ba and 6Bb are provided to allow the fitting portion 32 of the connection portion 3 and the pipe cover 7 to be easily fitted without reducing the degree of fitting.

[0106] In the case of modification 2 shown in Fig. 11(B), the opening 63B and the cutout portions 6Ba, 6Bb are narrower than the opening 63 of the board protection pipe 6 shown in Fig. 2 and the opening 63A of the board protection pipe 6A shown in Fig. 11(A). Therefore, it is stronger than the board protection pipe 6 shown in Fig. 2 and the board protection pipe 6A shown in Fig. 11(A), and can protect the circuit board 4 more securely.

[0107] Moreover, a substrate protection pipe 6C of Modification 3 shown in Fig. 11(C) is a type that does not have the cutout portions 6Ba, 6Bb that are provided in the substrate protection pipe 6B of Modification 2 shown in Fig. 11(B), but only has an opening 63C as a window portion. In the case of this substrate protection pipe 6C, the strength of the substrate protection pipe 6C itself can be increased by the amount that the cutout portions 6Ba, 6Bb are not provided, compared to the substrate protection pipe 6B shown in Fig. 11(B).

[0108] [Electronic pen with switches other than the side switch] Moreover, the electronic pen main body 8 of the above-described embodiment is provided with a side switch 43. This side switch 43 realizes a function similar to that of a click button provided on a mouse. For example, when the side switch 43 is pressed once (one-clicked), a cursor can be moved to the pressed position, and when the side switch 43 is pressed twice in succession (double-clicked), a specified window can be opened.

[0109] In addition, there are cases where it is desired to use one electronic pen in a variety of different ways, such as for drawing and as a so-called eraser for erasing drawn information. Therefore, in the case of the electronic pen of this embodiment, for example, a switch for switching functions can be easily configured.

[0110] Fig. 12 is a diagram for explaining an example in which a terminal for a switch is formed on a circuit board 4A. The circuit board 4A in this example is basically configured in the same way as the circuit board 4 shown in Fig. 2, but switch terminals 41c and 41d for switching functions are provided at the end portion on the opposite side to the core body 1 side, similar to the terminals 41a and 41b provided at the end portion on the core body 1 side. These switch terminals 41c and 41d are connected to an IC 42 that functions as a control circuit.

[0111] However, in this state, it is difficult to provide a mechanism for turning on / off the switch terminals 41c, 41d. Therefore, in this example, a so-called socket-type switch terminal member 70 is provided, as shown in Fig. 12. This switch terminal member 70 has a shape similar to that of the pipe cover 7 shown in Fig. 2, which has been flattened, and is thicker than the circuit board 4A. One end side of the switch terminal member 70 is provided with a recess that fits into the circuit board 4A, and the other end is provided with terminals 72a, 72b made of a conductive material that constitutes the switch terminals.

[0112] The side of the circuit board 4A on which the terminals 41c and 41d are provided is inserted into the recess of the switch terminal member 70 and fitted. In this case, the terminal 41c of the circuit board 4A and the terminal 72a of the switch terminal member are connected through the conductive connection member 70a, and the terminal 41d of the circuit board 4A and the terminal 72b of the switch terminal member are connected through the conductive connection member 70b. This configuration is similar to the connection configuration between the connection terminal portion 33 and the side on which the terminals 41a and 41b of the core body 1 of the circuit board 4 are provided, as described with reference to FIG. 2. The switch terminal member 70 also fits into the end of the board protection pipe 6, so that the circuit board 4A can be held in the board protection pipe 6 together with the board protection pipe 6.

[0113] In this way, the electronic pen body 8 with a switch terminal can be configured so that, except for the terminals 41c, 41d being provided on the circuit board 4A and the switch terminal member 70, the other configuration is the same as that of the electronic pen body 8 described with reference to Figures 1 to 4. Then, the switch terminals 41c, 41d provided on the circuit board 4A are led to the terminals 72a, 72b provided on the end face of the switch terminal member 70, so that a switch can be configured simply. In other words, a switch can be configured that is turned on when the terminals 72a and 72b are connected and turned off when they are not connected.

[0114] For this reason, the knock mechanism of the ballpoint pen is utilized so that the connection / disconnection between the terminals 72a and 72b can be switched every time the ballpoint pen is knocked. FIG. 13 is a diagram for explaining the configuration of a sliding member 114 that switches the connection / disconnection between the terminals 72a and 72b using the knock mechanism of the ballpoint pen. As shown in FIG. 13(A), the sliding member 114 is composed of a rod-shaped body 114A connected to the knock mechanism and a push member 114B that presses the terminals 72a and 72b. The push member 114B is composed of a main body 401a made of an elastic material such as rubber, and a metal member 401b attached to the surface of the main body 401a facing the terminals 72a and 72b.

[0115] The sliding member 114 thus configured moves up and down in the electronic pen housing in conjunction with a knock-type cam mechanism, and can switch between connection and disconnection between the terminals 72a and 72b. FIG. 14 is a diagram for explaining a knock-type mechanism provided on the rear case part 104 side of the electronic pen 100 of this example, FIG. 14(A) is a diagram showing a state in which the knock bar 110 is not pressed down, and FIG. 14(B) is a diagram showing a state in which the knock bar 110 is pressed down. As described with reference to FIG. 12, the electronic pen 100 of this example has a switch terminal formed by the circuit board 4A on which the switch terminals 41c and 41d are provided and the switch terminal member 70, and has the sliding member 114 described with reference to FIG. 13.

[0116] The knock mechanism of electronic pen 100 of this embodiment has the same configuration as the knock cam mechanism of a knock ballpoint pen of a writing instrument, and is configured by combining knock rod 110, rotor 111, cam body 112, and return coil spring 113, and includes a lock mechanism. The detailed configuration and operation of the knock cam mechanism of a knock ballpoint pen are well known, so a description thereof will be omitted here.

[0117] In this embodiment of electronic pen 100, knock bar 110 has a circular cross-section corresponding to the cross-section of the hollow section of rear case section 104 (the cross-section is a section perpendicular to the axial direction: the same applies below), and is composed of a first rod-shaped section 110a having a cross-section slightly smaller than the cross-section of the hollow section, a second rod-shaped section 110b formed integrally with first rod-shaped section 110a and which serves as a portion that connects to rotor 111, and a flange section 110c formed on the end face of first rod-shaped section 110a opposite the side that is joined to second rod-shaped section 110b. The knock bar 110 is housed in the rear case part 104 with a part of the first rod-shaped part 110a and the flange part 110c protruding to the outside from the opening 104b of the rear case part 104 so that the knock bar 110 can slide in the axial direction within the hollow part of the rear case part 104 in response to a knock operation (pressing operation) by the user. The knock bar 110 constitutes a protruding part.

[0118] The flange portion 110c is formed so as to create a step between it and the first rod-shaped portion 110a, and in this example, the cross-sectional shape and size of the flange portion 110c are identical to the outer peripheral shape and size of the cross-sectional surface of the rear case portion 104.

[0119] The cam body 112 is formed on the inner wall surface of the rear case portion 104, and is configured to mesh with the rotor 111. As the knock bar 110 slides in the axial direction, the rotor 111 moves in the axial direction within the hollow portion of the rear case portion 104 and rotates, changing the state of meshing with the cam body 112. As a result, a knocking action is performed in response to a knocking operation on the knock bar 110.

[0120] In this embodiment, a sliding member 114 is coupled to the rotor 111. The sliding member 114 is composed of a rod-shaped body 114A and a pusher member 114B, and the pusher member 114B is attached to one end side of the sliding member 114, and the other end side of the sliding member 114 is attached by being fitted into a fitting portion (not shown) provided on the rotor 111.

[0121] In this case, as shown in Fig. 14(A), when the knock bar 110 is not pressed down, no axial force is applied to the rod-shaped body 114A and the pusher member 114B, and the metal member 401b of the pusher member 114B does not connect the terminals 72a, 72b of the switch terminal member 70. However, as shown in Fig. 14(B), when the knock bar 110 is pressed down, an axial force is applied, and the metal member 401b of the pusher member 114B is of a length such that it comes into contact with both terminals 72a, 72b of the switch terminal member 70 so as to connect them.

[0122] The return coil spring 113 of the knock cam mechanism is attached in a state in which it is inserted into the rod-shaped body 114A of the sliding member 114, and is capable of expanding and contracting between the axial end face of the rotor 111 and a return coil spring engaging portion 115 provided in the rear case portion 104.

[0123] That is, when the flange portion 110c side of the knock bar 110 is pressed down in the state shown in FIG. 14(A), the knock cam mechanism including the rotor 111 and cam body 112 operates in response to the axial sliding movement of the knock bar 110, causing the flange portion 110c of the knock bar 110 to be in the vicinity of the end of the opening 104b of the rear case portion 104, thereby locking the knock bar 110 in the state shown in FIG. 14(B).

[0124] At this time, the metal member 401b of the pusher member 114B connects the terminals 72a, 72b of the switch terminal member 70, and the switch is turned on. At this time, the fitting hole 110d formed in the first rod-shaped portion 110a of the knock bar 110 engages with the engaging protrusion (not shown) formed on the inner wall of the hollow portion of the rear case portion 104, and the knock bar 110 is locked in the state shown in FIG. 14(B).

[0125] When the flange portion 110c side of the knock bar 110 is pressed down again from the state shown in Fig. 14(B), the locked state is released by the knock cam mechanism including the rotor 111 and the cam body 112, and the knock bar 110 and the rotor 111 slide in the axial direction by the return coil spring 113 so as to return to the state shown in Fig. 14(A), and are locked in the state shown in Fig. 14(A). At this time, the fitting hole 110e formed in the second rod-shaped portion 110a of the knock bar 110 engages with the engagement protrusion (not shown) formed on the inner wall of the hollow portion of the rear case portion 104, and the knock bar 110 is locked in the state shown in Fig. 14(A).

[0126] Then, in response to the return of the knock bar 110 and the rotor 111 to the state shown in FIG. 14(A), the rod-shaped body 114A and the pusher member 114B return to a state in which the metal member 401b of the pusher member 114B is not in contact with the terminals 72a, 72b of the switch terminal member 70, as shown in FIG. 14(A), and the switch is turned on.

[0127] In addition, instead of the metal member 401b of the pusher member 114B shown in FIG. 13(A), a pusher member 114C using a spring-shaped metal member 401c may be formed as shown in FIG. 13(B). The spring-shaped metal member 401c in this example is a wire-shaped metal member processed into a circular spiral shape to have elasticity. As a result, the spring-shaped metal member 401c can be brought into contact with the terminals 72a and 72b of the switch terminal member 70 at the same time to short-circuit both terminals. Furthermore, even if an excessive force is applied to the knock bar 110, the spring-shaped metal member 401c also plays a role of absorbing the force so that the excessive force is not applied to the switch terminal member 70. In addition, various members having electrical conductivity and elasticity may be used instead of the metal members 401b and 401c.

[0128] In this manner, by utilizing the switch terminal member 70 connected to the switch terminals 41c, 41d of the circuit board 4A and the knock mechanism of the writing implement, for example, a switch for switching functions can be easily configured. In this case, by using a so-called socket-type switch terminal member 70, it is possible to provide the desired switch function with a relatively simple configuration on the circuit board 4A without configuring a switch mechanism with a complex configuration.

[0129] [Simplification of electrical connections between the coil, pressure-sensing member, and circuit board] In the case of the electronic pen body 8 of the electromagnetic induction coupling type according to the embodiment described with reference to Figs. 1 to 4, the electrical connection between the coil 22 of the coil unit 2 and the circuit board 4 and the electrical connection between the pressure-sensing component of the pen pressure detection unit 31 and the circuit board 4 are made through separate paths. That is, the electrical connection between the pressure-sensing component of the pen pressure detection unit 31 and the circuit board 4 is made by connecting the connection terminals 33a and 33b of the connection terminal unit 33 to which the signal line from the terminal member of the pressure-sensing component is connected, to the terminals 41a and 41b of the circuit board 4. On the other hand, the electrical connection between the coil 22 of the coil unit 2 and the circuit board 4 has been described as being made by directly connecting the extension lines 23a and 23b from both ends of the coil 22 to the circuit board 4. However, this is not limited to this.

[0130] The electrical connection between the coil 22 of the coil unit 2 and the circuit board 4 and the electrical connection between the pressure-sensing component of the pen pressure detection unit 31 and the circuit board 4 can be made through the same path. Fig. 15 is a diagram for explaining the configuration of a connection unit (connection member) 3A in this example for making the electrical connection between the coil 22 of the coil unit 2 and the circuit board 4 and the electrical connection between the pressure-sensing component of the pen pressure detection unit 31 and the circuit board 4 through the same path. The connection unit 3A is a portion consisting of a pen pressure detection unit 31A, a fitting portion 32A, and a connection terminal portion 33A.

[0131] The pen pressure detection section 31A, the fitting section 32A, and the connection terminal section 33A of the connection section 3A are basically configured in the same manner as the pen pressure detection section 31A, the fitting section 32A, and the connection terminal section 33A of the connection section 3 of the electronic pen body section 8 in the embodiment described with reference to Figures 1 to 4. The electrical connection with the coil 22 is different.

[0132] As shown in Fig. 15, the connection terminal section 33A is composed of two upper and lower plate sections, and the upper plate section is provided with connection terminals 33a and 33b. These connection terminals 33a and 33b are extended toward the pen pressure detection section 31 side and connected to the terminal members of the pressure-sensing components of the pen pressure detection section 31. The connection terminals 33a and 33b are routed to the back side of the plate section on which they are provided, so that when the circuit board 4 is connected to the connection terminal section 33 in a sandwiched manner, they can be automatically connected to the terminals 41a and 41b of the circuit board 4. The configuration in which the connection terminal section 33 is provided with the connection terminals 33a and 33b connected to the terminal members of the pressure-sensing components is the same as the connection section 3 of the electronic pen main body section 8 described above.

[0133] Furthermore, the connection terminal portion 33A of the connection portion 3 in this example is provided with a coil connection portion 33c as shown in Fig. 15. The coil connection portion 33c is provided with connection ends C1 and C2 made of conductors as shown in Fig. 15, with the connection end C1 connected to the connection terminal 33a and the connection end C2 connected to the connection terminal 33b. Both ends of the coil 22 of the coil portion 2 are connected to the coil connection portion 33c. More specifically, as shown in Fig. 15, the conductor portions of the extension wires (coated conductors) 23a and 23b extending from both ends of the coil 22 of the coil portion 2, from which the coating has been removed, are connected to the coil connection portion 33c.

[0134] The coil connection portion 33c may be configured with two terminals having V-shaped locking grooves (notches) arranged side by side. In this case, the V-shaped locking grooves provided in the terminals are, for example, grooves formed in a tapered shape from the top to the bottom. Therefore, the extension wire 22a or the extension wire 22b of the coil 22 can be fixed to the V-shaped locking groove of the terminal by pushing the extension wire 22a or the extension wire 22b of the coil 22 into the V-shaped locking groove of the terminal from the opening at the top to the bottom. Of course, the extension wire 22a or the extension wire 22b of the coil 22 may be configured to be sandwiched in the notch of a terminal having a notch with a V-shaped opening.

[0135] As a result, the conductor of one extension wire 23a of the coil 22 is connected to the connection end C1 of the coil connection portion 33c, and the conductor of one extension wire 23b of the coil 22 is connected to the connection end C2 of the coil connection portion 33c. As described above, the connection end C1 is connected to the connection terminal 33a, and the connection end C2 is connected to the connection terminal 33b, so that one extension wire 23a of the coil 22 is connected to the connection terminal 33a, and the other extension wire 23b of the coil 22 is connected to the connection terminal 33b. That is, the output terminal of the pressure-sensing component of the pen pressure detection unit 31 and both ends of the coil 22 are connected to the connection terminals 33a and 33b of the connection terminal portion 33A.

[0136] As a result, when the circuit board 4 is attached so as to be sandwiched between the two plate portions of the connection terminal portion 33A, the connection terminals 33a, 33b of the connection terminal portion 33A can be automatically connected to the terminals 41a, 42b of the circuit board 4. Since not only the output terminals of the pressure-sensing component but also both ends of the coil 22 are connected to the connection terminals 33a, 33b of the connection terminal portion 33A, the pressure-sensing component of the pen pressure detection portion 31 and the coil 22 of the coil portion 2 can be simultaneously connected to the electronic circuit formed on the circuit board 4.

[0137] Fig. 16 is a diagram showing an example of an equivalent circuit when an electronic pen main body is configured using the connection part 3A shown in Fig. 15. As shown in Fig. 16, an extension line 23a from one end of the coil 22 is connected to a connection end C1 of the coil connection part 33c, and an extension line 23b from the other end of the coil 22 is connected to a connection end C2 of the coil connection part 33c.

[0138] The connection ends C1 and C2 are connected to connection terminals 33a and 33b of a connection terminal section 33A to which the output terminals of the pressure-sensing components of the pen pressure detection section 31 are connected. As a result, when the circuit board 4 shown by the dotted line is connected to the connection terminal section 33A, as shown by the arrows, the connection terminal 33a is connected to the terminal 41a of the circuit board 4, and the connection terminal 33b is connected to the terminal 41b of the circuit board 4. As a result, the coil 22 of the coil section 2 and the pressure-sensing components of the pen pressure detection section 31A can be simultaneously and reliably electrically connected to the electronic circuit formed on the circuit board 4.

[0139] The connection terminals 33a, 33b provided on the fitting portion 32A and the connection terminal portion 33A of the connection portion 3A are formed with a conductive material in a conductive pattern shown in FIG. 15 by using various methods such as crimping, fusing, adhesion, and coating. In this case, on the pen pressure detection unit 31 side, the connection terminals 33a, 33b are formed so that they can be connected to the output terminals of the pressure-sensing component of the pen pressure detection unit 31 simply by fitting the fitting portion 32A and the connection terminal portion 33A to the pen pressure detection unit 31. Then, as shown in FIG. 15, a coil connection portion 33c is provided with connection ends C1, C2 electrically connected to the connection terminals 33a, 33b.

[0140] In this way, it is possible to form the connection part 3A for constituting the electronic pen body 8, which can simply and reliably connect the pressure-sensing components of the pen pressure detection unit 31 and the coil 22 of the coil unit 2 to the circuit of the circuit board 4 without any bonding work such as soldering. By using this connection part 3A, it is possible to realize the electronic pen body 8 that is extremely easy to assemble.

[0141] In FIG. 16, the circuit board 4 is shown to have an electronic circuit consisting of an IC 42, and capacitors 44, 45, etc. However, it goes without saying that the electronic circuit formed on the circuit board 4 can have various configurations, such as by providing a side switch or other capacitors.

[0142] [others] In the above-described embodiment, the substrate protection pipe 6 is assumed to be cylindrical, but is not limited thereto. It may be cylindrical with a side wall having a polygonal cross section. FIG. 17 is a diagram for explaining an example of a substrate protection pipe having a polygonal cross section in a direction intersecting the longitudinal direction. The substrate protection pipe 6D shown in FIG. 17(A) is not cylindrical in shape but is substantially prismatic, and has a core body side opening 61 on the core body side, a rear end opening 62 on the rear end side, and a large opening 63D on the side surface (upper surface side).

[0143] The cross section of the substrate protection pipe 6D in the direction intersecting the longitudinal direction has a flat bottom surface and a rounded side wall on the outside, as shown in Fig. 17(B). The substrate protection pipe 6D having such a shape has an advantage that the circuit substrate can be more stably contained and held inside the substrate protection pipe 6D. Furthermore, the window portions (side openings in the direction along the axial center) provided in the substrate protection pipe can be provided in the required number of windows of the required size at appropriate positions. In other words, the opening on the upper surface side is not limited to the large opening 63D shown in Fig. 17(A), and openings can be provided in various forms, for example, as described with reference to Fig. 11.

[0144] However, it is preferable that there is a portion having a side wall with an angular range of 180 degrees or more around the axis so that the circuit board stored in the board protection pipe can be held. More preferably, it is preferable that both long sides of the side opening and the opposing surface of the circuit board stored inside abut against the inner wall of the board protection pipe and do not protrude to the outside. In other words, it is preferable that the side opening provided in the board protection pipe is smaller than the opposing surface of the circuit board. Note that, in order to maintain the strength of the board protection pipe 6, it is preferable that there is no portion having a side wall with an angular range of less than 180 degrees around the axis.

[0145] Furthermore, it is of course possible to mount various electronic components on the circuit board 4 in addition to the electronic components described above.

[0146] Furthermore, the components constituting the electronic pen body 8 and the like can be of any suitable size, making it possible to configure an electronic pen body of any suitable size.

[0147] In the above embodiment, the pressure-sensing component of the pen pressure detection unit 31 is a variable capacitance capacitor that varies the capacitance by a mechanically movable part according to the pen pressure, but the present invention is not limited to this. A variable capacitance capacitor configured as a MEMS (Micro Electro Mechanical System) chip made of a semiconductor device may be used. Needless to say, the pressure-sensing component may not detect the change in capacitance, but may vary the inductance value or resistance value. [Explanation of symbols]

[0148] 1...core body, 2...coil portion, 3...connection portion, 31...pen pressure detection portion, 32...fitting portion, 33...connection terminal portion, 33a, 33b...connection terminal, 4...circuit board, 41a, 41b...terminal, 42...IC (control circuit), 43...side switch, 44-49...capacitor, 5...board support, 6, 6A, 6B, 6C, 6D...board protection pipe, 61...core body side opening, 61a...core body side fitting portion, 62...rear end side opening, 62a...rear end side Fitting portion, 63, 63A, 63B, 63C, 63D...opening, 7...pipe cover, 8...electronic pen main body, 9...electronic pen cartridge, 10...electronic pen, 11...case, 12...housing cover, 70...switch terminal member, 70a, 70b...connecting member, 41c, 41d...terminal, 114, 114'...sliding member, 114A...rod-shaped body, 114B, 114C...push member, 401a...main body, 401b, 401c...metal member 3A: Connection portion, 31A: Pen pressure detection portion, 32A: Fitting portion, 33A: Connection terminal portion, 33c: Coil connection portion, C1, C2: Connection end portion

Claims

1. An electronic pen having a rod-shaped housing, a pen tip located at the tip of the electronic pen; A writing pressure sensor that detects a writing pressure applied to the pen tip; a rod-shaped storage component that is on a first side of the writing pressure sensor on an axis of the rod-shaped housing, the second side of the writing pressure sensor being different from a first side on which the pen tip is present, and that does not store the writing pressure sensor; an electronic component housed in the rod-shaped housing component; The rod-shaped housing houses the rod-shaped housing part that houses the pen pressure sensor and the electronic parts.

1. An electronic pen comprising:

2. The electronic component is a circuit board, and the circuit board is electrically connected to the pen pressure sensor.

2. The electronic pen according to claim 1 .

3. The housing further includes a connection member having a connection portion connected to the housing component and an electrical connection portion electrically connected to the circuit board housed in the housing component.

3. The electronic pen according to claim 2.

4. The electronic pen cartridge is housed in the rod-shaped housing, and further includes an electronic pen cartridge that houses a rod-shaped housing component that houses the writing pressure sensor and the electronic component.

2. The electronic pen according to claim 1 .

5. 2. The electronic pen according to claim 1, wherein the housing part is made of any one of a metal, a carbon material, and a synthetic resin.

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