Electronic pen

Abstract

It is possible to reduce the pressure on the electrode conductors of the battery mounted on the thin electronic pen. The electronic pen includes: a circuit board disposed in the hollow portion of a cylindrical housing such that the axial direction of the housing is the length direction of the circuit board; an electronic circuit portion disposed on the circuit board; and a battery having a columnar shape and disposed in the hollow portion of the housing on the side opposite to the nib side of the circuit board in the axial direction in a state where the positive electrode conductor and the negative electrode conductor led out from one end face in the center line direction of the columnar shape extend toward the circuit board side. The battery is disposed in a state where there is a separation space between one end face in the center line direction of the columnar shape from which the positive electrode conductor and the negative electrode conductor are led out and the end portion in the length direction of the circuit board, and the front end sides of the positive electrode conductor and the negative electrode conductor are in contact with the circuit board. The electronic pen is configured such that the circuit board is electrically connected to the front end sides of the positive electrode conductor and the negative electrode conductor through an electrical connection fixing portion, and the voltage of the battery is supplied as a power supply voltage to the electronic circuit portion.

Description

Technical Field

[0001] The present invention relates to an electronic pen with a built-in battery. Background Art

[0002] As electronic pens, there are various types of electronic pens such as electromagnetic induction type and electrostatic coupling type. Recently, however, their functionality has been improving, and the number of electronic pens equipped with various electronic circuit parts is increasing. Therefore, in such an electronic pen, it is necessary to incorporate a battery that supplies a power voltage to the electronic circuit part (see, for example, Patent Document 1 (Japanese Patent No. 5762659)).

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Patent No. 5762659 Summary of the Invention

[0006] Problems to be Solved by the Invention

[0007] As a battery for such an electronic pen, a battery having a small and thin shape corresponding to high energy density and the thinning of the electronic pen is required. For example, a lithium-ion battery is suitable. However, such small and thin batteries such as lithium-ion batteries require care in handling, and there is a problem that they require shock resistance and a reduction in pressure on the positive and negative electrode conductors.

[0008] An object of the present invention is to provide an electronic pen that can solve the above problems.

[0009] Means for Solving the Problems

[0010] To solve the above problems, there is provided an electronic pen, characterized in that

[0011] the electronic pen includes:

[0012] a cylindrical housing;

[0013] a circuit board disposed in a hollow portion of the cylindrical housing such that the axial direction of the housing becomes the length direction of the circuit board;

[0014] an electronic circuit part disposed on the circuit board; and

[0015] a battery having a columnar shape and disposed in the hollow portion of the housing on the side opposite to the nib side of the circuit board in the axial direction in a state where a positive electrode conductor and a negative electrode conductor led out from one end face in the center line direction of the columnar shape extend toward the circuit board side.

[0016] The battery is arranged such that there is a separation space between one end face in the center line direction of the columnar shape from which the positive electrode conductor and the negative electrode conductor are led out and the end portion in the length direction of the circuit board, and the front end sides of the positive electrode conductor and the negative electrode conductor are in contact with the circuit board.

[0017] The electronic pen is configured such that the circuit board is electrically connected to the front end sides of the positive electrode conductor and the negative electrode conductor through an electrical connection fixing portion, and the voltage of the battery is supplied as a power supply voltage to the electronic circuit portion.

[0018] In the electronic pen having the above structure, the positive electrode conductor and the negative electrode conductor of the battery extend from one end face in the center line direction of the columnar shape toward the circuit board side and are arranged in a state where the front end sides are in contact with the circuit board. Further, the battery is electrically connected and fixed to the circuit board through the electrical connection fixing portion in a state where there is a separation space between one end face in the center line direction of the columnar shape from which the positive electrode conductor and the negative electrode conductor are led out and the end portion in the length direction of the circuit board.

[0019] Therefore, since the force from the nib side is received in the axial direction of the positive electrode conductor and the negative electrode conductor of the battery and the portion of the above separation space is utilized for receiving, an effect of impact resistance and reduction of pressure on the positive and negative electrode conductors can be obtained with respect to the battery. Description of the Drawings

[0020] Figure 1 is a diagram for explaining an example of an electronic device using an embodiment of the electronic pen of the present invention.

[0021] Figure 2 is an exploded perspective view for explaining an example of the internal structure of an embodiment of the electronic pen of the present invention.

[0022] Figure 3 is an exploded perspective view for explaining an example of the structure of a pen pressure detection module in an embodiment of the electronic pen of the present invention.

[0023] Figure 4 is a diagram for explaining a main part in an example of the internal structure of an embodiment of the electronic pen of the present invention.

[0024] Figure 5 is a diagram for explaining a main part in an example of the internal structure of an embodiment of the electronic pen of the present invention.

[0025] Figure 6 is a diagram for explaining a main part in an example of the internal structure of an embodiment of the electronic pen of the present invention.

[0026] Figure 7It is a diagram showing the main part in an example of the internal structure for explaining an embodiment of the electronic pen of the present invention.

[0027] Figure 8 It is a diagram showing an example of the structure on the tip side of an embodiment of the electronic pen of the present invention.

[0028] Figure 9 It is a diagram showing an example of the structure on the rear end side of an embodiment of the electronic pen of the present invention.

[0029] Figure 10 It is a diagram for explaining an example of another embodiment of the electronic pen of the present invention.

[0030] Figure 11 It is a diagram for explaining another example of another embodiment of the electronic pen of the present invention.

[0031] Figure 12 It is a diagram for explaining another example of another embodiment of the electronic pen of the present invention. Detailed Embodiment

[0032] Hereinafter, while referring to Figure 1 an embodiment of the electronic pen of the present invention will be described. The electronic pen 1 in the embodiment described below is of a type that transmits an indication position to a position detection device by electromagnetic induction.

[0033] Figure 1 An example of an electronic device 200 using the electronic pen 1 of this embodiment is shown. In this example, the electronic device 200 is a high - performance portable phone terminal having a display screen 200D of a display device such as an LCD (Liquid Crystal Display), and a position detection device 202 of electromagnetic induction type is provided below (inside) the display screen 200D.

[0034] The housing of the electronic device 200 in this example has a storage recess 201 for storing the electronic pen 1. The user takes out the electronic pen 1 stored in the storage recess 201 from the electronic device 200 as needed, and uses the display screen 200D as an input surface to perform a position indication operation.

[0035] In the electronic device 200, when a position indication operation is performed on the display screen 200D with the electronic pen 1, the position detection device 202 provided inside the display screen 200D detects the position and pen pressure operated by the electronic pen 1, and the microcomputer included in the position detection device 202 of the electronic device 200 performs display processing corresponding to the operation position and pen pressure on the display screen 200D.

[0036] In the electronic pen 1 of this embodiment, a plurality of components of the electronic pen 1 are accommodated in the hollow portion of a cylindrical outer shell (housing) 2 made of, for example, resin, and are arranged in the axial direction. One end side of the cylindrical outer shell is formed into a tapered shape, and an opening is provided at this end (not shown in Figure 1 ), and the front end portion 32 of the rod-shaped core 3 described later is exposed as the nib through this opening. And, the side opposite to the nib side of the outer shell 2 is fitted with a rear end cap 21, and is closed in a state where waterproofness and dustproofness are ensured by a seal.

[0037] Moreover, in this example, the electronic pen 1 is provided with a side switch. That is, as shown in Figure 2 , a printed circuit board 10 is provided in the hollow portion inside the outer shell 2, and a side switch 104 is mounted on the printed circuit board 10. And, a through hole (not shown) is provided at a position on the side circumferential surface of the outer shell 2 of the electronic pen 1 corresponding to the side switch 104. As shown in Figure 1 , a push operation member 22 for the side switch is arranged at the through hole portion in a state of being exposed through the through hole so as to be able to press the side switch 104 mounted on the printed circuit board. In this case, with respect to the pressing operation of the side switch 104 by the push operation member 22, a prescribed function is allocated and set on the side of the electronic device 200 having the position detection device 202. For example, in the electronic device 200 of this example, the pressing operation of the side switch 104 by the push operation member 22 can be allocated and set as an operation similar to the click operation in an indicating device such as a mouse.

[0038] Moreover, in this example, as shown in Figure 2 , a nib side member, a printed circuit board 10, and a battery 11 are accommodated in the hollow portion inside the cylindrical outer shell 2 of the electronic pen 1 in the axial direction in sequence.

[0039] Figure 2 is an exploded perspective view showing the component groups accommodated in the outer shell 2 of the electronic pen 1 arranged for each component. It should be noted that although not shown in Figure 2 , in this embodiment, the outer shape in the direction orthogonal to the central axis of the outer shell 2 (equal to the contour shape of the cross section of the outer shell 2) is formed into a flat shape. And, the cross-sectional shape of the hollow portion inside the outer shell 2 is also formed into a flat shape corresponding to the outer shape of the outer shell 2, and the components accommodated in the outer shell 2 are also formed into shapes corresponding to the flat shape of the hollow portion.

[0040] As shown in Figure 2As shown, within the hollow portion of the outer shell 2, a core body 3, a front cap 4 forming a sealing member, a coil member 5, a coil member holder 6, a pressing member 7, a pen pressure detection module 8, and a substrate holder 9 are arranged in sequence in the axial direction of the outer shell 2 (hereinafter, simply referred to as the axial direction for simplicity of explanation) starting from the nib side. The core body 3, the front cap 4, the coil member 5, the coil member holder 6, the pressing member 7, and the pen pressure detection module 8 form a nib-side member.

[0041] The substrate holder 9 is made of an insulating material (such as resin), has a boat-like shape, and has a substrate storage portion 91 in the middle portion in its axial direction. Further, the substrate holder 9 has a fitting portion 92 with the nib-side member on the nib side of the substrate storage portion 91 in the axial direction, and a battery storage portion 93 on the side opposite to the nib side of the substrate storage portion 91.

[0042] The substrate storage portion 91 and the battery storage portion 93 have openings 91a and 93a in the axial direction, and are respectively configured to receive and lock a printed circuit board 10 and a battery 11. However, in this embodiment, the substrate storage portion 91 and the battery storage portion 93 are separated by a wall portion 94 in the axial direction.

[0043] The printed circuit board 10 is an example of a circuit board. In this example, electronic circuit components and conductive patterns are formed on both the upper surface 10a and the lower surface 10b of the printed circuit board 10 (refer to Figure 8 ) described later.

[0044] In addition, the fitting portion 92 of the substrate holder 9 is configured as a cylinder, and as described later, is configured to fit the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8 that forms a part of the nib-side member.

[0045] Next, a structural example of the nib-side member will be described. In this example, the core body 3 is made of resin (such as polycarbonate, synthetic resin, ABS (acrylonitrile-butadiene-styrene) resin, etc.), which is an example of a hard non-conductive material, and is composed of a core body main portion 31 and a front end portion 32 that serves as the nib. The core body 3 is installed by inserting the core body main portion 31 from the opening on the nib side of the outer shell 2 in a state where all of the above components are accommodated in the hollow portion of the outer shell 2 and engaging with the pressing member 7 provided on the pen pressure detection module 8 as described later. In this case, the core body 3 can be inserted and removed relative to the electronic pen 1. The core body 3 functions to transmit the pressure (pen pressure) applied to the front end portion 32 to the pressure-sensitive portion 83 of the pen pressure detection portion 81.

[0046] The coil member 5 is composed of a coil 51 and a magnetic core (a ferrite core 52 in this example) around which the coil 51 is wound. In this example, the ferrite core 52 of the coil member 5 has a columnar shape with a through-hole 52a at the central axis position for inserting the core body portion 31 of the rod-shaped core 3. In this embodiment, the ferrite core 52 has a flat cross-sectional shape corresponding to the cross-sectional shape of the hollow portion of the housing 2, and a tapered portion 52b that is tapered and pointed on the nib side is formed.

[0047] The front cap 4 is provided on the tapered portion 52b side of the ferrite core 52 that becomes the nib side of the electronic pen. The front cap 4 is made of an elastic material (such as elastic rubber), has a cap shape covering the nib side of the ferrite core 52, and has an opening (through-hole) 4a for inserting the core body portion 31 of the core 3. And, in this example, as shown in the figure, the outer appearance of the front cap 4 is formed in a short skirt shape with a flared hem.

[0048] The coil member holder 6 is provided on the end portion 52c side of the ferrite core 52 opposite to the tapered portion 52b. The coil member holder 6 is made of an elastic material (such as elastic rubber). The coil member holder 6 has a fitting portion 61 for fitting and accommodating the end portion 52c of the ferrite core 52, and has a protrusion 62 that is press-fitted into the hollow portion 821a of a later-described pen pressure transmission member 82 of the pen pressure detection module 8.

[0049] A concave hole 61a corresponding to the outer shape of the end portion 52c of the ferrite core 52 is provided in the fitting portion 61 of the coil member holder 6. And, a through-hole (not shown in the figure) for inserting the core body portion 31 of the core 3 is formed in the protrusion 62. The through-hole of the protrusion 62 communicates with the concave hole 61a of the fitting portion 61. Therefore, a hollow space for inserting the core body portion 31 of the core 3 is formed in the coil member holder 6 through the fitting portion 61 and the protrusion 62.

[0050] And, in a state where the end portion 52c of the ferrite core 52 of the coil member 5 is fitted into the fitting portion 61 of the coil member holder 6, since a through-hole 52a for inserting the core body portion 31 of the core 3 is formed in the ferrite core 52, a hollow space for inserting the core body portion 31 of the core 3 is formed through the coil member 5 and the coil member holder 6.

[0051] The pressing member 7 provided on the protrusion 62 side of the coil member holder 6 has a fitting concave hole 7a into which the end portion 31a of the core body portion 31 of the core 3 is press-fitted. The core 3 is in a state where it will not fall off due to the presence of the pressing member 7. However, if the core 3 is pulled forcefully toward the front end portion 32 side, the fitting of the end portion 31a of the core body portion 31 with the fitting concave hole 7a of the pressing member 7 is released, and the core 3 can be pulled out and the core 3 can be replaced.

[0052] In this embodiment, the pen pressure detection module 8 is formed by engaging and combining a pen pressure detection unit 81 and a pen pressure transmission member 82. Figure 3 It is an exploded perspective view for explaining in more detail the structural example of the pen pressure detection module 8. In addition, Figure 4 (A) of is a cross-sectional view of the vicinity of the pen pressure detection module 8 in a state of being housed in the housing 2. And, Figure 4 (B) of is an external perspective view when the pen pressure transmission member 82 is viewed from the side of the joint with the pen pressure detection unit 81.

[0053] In this example, the pen pressure detection unit 81 uses a variable capacitance capacitor whose capacitance changes according to the pen pressure applied to the core 3. As shown in Figure 3 and Figure 4 (A) of, in this embodiment, it is composed of a pressure-sensitive part 83 and a holder 84 that holds the pressure-sensitive part 83 and has the function of making an electrical connection. The pressure-sensitive part 83 is composed of a dielectric 831, a spacer 832, and a conductive elastomer 833. The holder 84 is made of an insulating material (such as resin). As shown in Figure 3 , it integrally has a holding part 841 for holding the pressure-sensitive part 83 and a connection part 842 for electrically connecting the two electrodes of the pressure-sensitive part 83 held by the holding part 841 to the printed circuit board 10 housed in the substrate holder 9.

[0054] The pen pressure transmission member 82 holds the pressure-sensitive part 83 in the holding part 841 of the holder 84 of the pen pressure detection unit 81 by engaging with the holding part 841 of the holder 84. In addition, as described above, the pen pressure transmission member 82 has a hollow part 821a into which the protrusion 62 of the coil member holder 6 is press-fitted. By press-fitting the protrusion 62 of the coil member holder 6 into the hollow part 821a of the pen pressure transmission member 82 that is engaged and combined with the pen pressure detection unit 81, the pen pressure detection module 8 and the coil member 5 are combined.

[0055] The pressure-sensitive part 83 of the pen pressure detection unit 81 is composed of a dielectric 831, an annular spacer 832, and a conductive elastomer 833 as a variable capacitance capacitor. A conductor layer is formed on one surface 831a of the dielectric 831 to constitute the first electrode of the variable capacitance capacitor. The pen pressure from the core 3 is applied to the conductive elastomer 833 via the pressing member 7 and further via the pen pressure transmission member 82. As a result, the conductive elastomer 833 is pressed into the other surface 831b side of the dielectric 831 via the annular spacer 832 and deformed. By this deformation, the conductive elastomer 833 comes into contact with the other surface 831b of the dielectric 831. The contact area between the conductive elastomer 833 and the other surface 831b of the dielectric 831 constitutes the second electrode.

[0056] Therefore, according to the magnitude of the pen pressure applied to the core 3, the contact area between the conductive elastomer 833 and the other surface 831b of the dielectric 831, that is, the area of the second electrode of the variable capacitance capacitor formed by clamping the first electrode and the second electrode through the dielectric 831, changes, and the capacitance of the variable capacitance capacitor changes. The pen pressure is detected by detecting the change in the capacitance of the variable capacitance capacitor.

[0057] The holder 84 of the pen pressure detection unit 81 is formed as a structure integrally including a holding portion 841 and a connecting portion 842, such as an injection molded product made of resin. The connecting portion 842 includes a plate-shaped protruding portion 8421 protruding in a direction parallel to the upper surface 10a of the printed circuit board 10 and in the axial direction. The protruding portion 8421 is arranged so as to exactly contact the upper surface 10a of the printed circuit board 10 when the pen pressure detection module 8 is fitted with the substrate holder 9 and engaged with the printed circuit board 10.

[0058] In this embodiment, two terminal members 843 and 844 are formed in the axial direction from the holding portion 841 to the connecting portion 842 of the holder 84 as a conductive three-dimensional fine pattern (shown with slashes for easy understanding in Figure 2 and Figure 3 ). As shown in Figure 2 and Figure 3 , the two terminal members 843 and 844 are formed in a state of being exposed at both end edges in a direction orthogonal to the direction of applying the pen pressure in the protruding portion 8421.

[0059] In this embodiment, by accommodating and holding the pressure-sensitive portion 83 in the holding portion 841 of the holder 84 of the pen pressure detection unit 81, the first electrode and the second electrode of the pressure-sensitive portion 83 are automatically electrically connected to the two terminal members 843 and 844 of the connecting portion 842.

[0060] It should be noted that, as shown with slashes in Figure 3 , one end portion 844a of the terminal member 844 is exposed and formed at the bottom of the concave portion 841a of the holding portion 841 of the holder 84 in contact with and electrically connected to the first electrode (on the side of one surface 831a of the dielectric 831) of the pressure-sensitive portion 83. Similarly, as shown with slashes in Figure 3 , one end portion 843a of the terminal member 843 is exposed and formed in the holding portion 841 of the holder 84, and the protruding portion 833a of the conductive elastomer 833 serving as the second electrode of the pressure-sensitive portion 83 contacts and is electrically connected by butting against one end portion 843a of the terminal member 843.

[0061] Further, in this embodiment, the two terminal members 843 and 844 of the connecting portion 842 of the cage 84 of the pen pressure detection unit 81 are configured to be electrically connected to the conductive pattern formed on the printed circuit board 10 housed in the substrate holder 9.

[0062] As Figure 3 and Figure 4 shown in (B) of FIG., the pen pressure transmission member 82 of the pen pressure detection module 8 is integrally formed by a cylindrical body portion 821 having a hollow portion 821a therein and a barrier 822 that closes the hollow space of the hollow portion 821a of the cylindrical body portion 821.

[0063] In this example, the barrier 822 is formed of a thin plate-like body and is configured to be elastically displaceable in its plate thickness direction, and this plate-like body is formed of an elastic member (such as an elastomer). The cylindrical body portion 821 may also be formed of a non-elastic material (such as resin).

[0064] Further, an opening is formed on the side of the hollow portion 821a of the cylindrical body portion 821 where the barrier 822 is not provided, and the protrusion 62 of the coil member holder 6 is press-fitted into the hollow portion 821a from the opening side.

[0065] If the core body portion 31 of the core 3 is inserted through the through hole 52a of the ferrite core 52 of the coil member 5, the concave hole 61a of the fitting portion 61 of the coil member holder 6, and the through hole 62a of the protrusion 62 and is pressed in, then as Figure 4 shown in (A) of FIG., the end portion 31a of the core body portion 31 of the core 3 is press-fitted into the fitting concave hole 7a of the pressing member 7 in the hollow portion 821a of the pen pressure transmission member 82.

[0066] Therefore, if pen pressure is applied to the core 3, this pen pressure is transmitted to the pressing member 7, and this pressing member 7 presses the barrier 822 of the pen pressure transmission member 82, and the barrier 822 is elastically displaced in the axial direction according to the applied pen pressure.

[0067] Further, in a state where the pressure-sensitive portion 83 is housed in the holding portion 841 of the cage 84, if the pen pressure transmission member 82 is coupled to the cage 84 in the axial direction, then as Figure 5 shown in FIG., the two are coupled, and thereby, the pressure-sensitive portion 83 is held in the holding portion 841 of the cage 84.

[0068] Further, in a state where the pen pressure transmission member 82 is engaged and coupled with the cage 84, as Figure 4 shown in (A) of FIG., the barrier 822 of the pen pressure transmission member 82 becomes a state where it can press the conductive elastic body 833 of the pressure-sensitive portion 83.

[0069] Further, as described above, when a pen pressure is applied to the core 3, the barrier 822 of the pen pressure transmission member 82 is pressed by the pressing member 7 according to the applied pen pressure. The barrier 822 is elastically displaced in the axial direction according to the applied pen pressure, and the conductive elastomer 833 of the pressure-sensitive portion 83 is pressed by this elastic displacement of the barrier 822. Accordingly, the conductive elastomer 833 and the dielectric 831 separated by the spacer 832 come into contact with each other, and the contact area thereof changes according to the pen pressure. The capacitance corresponding to the contact area between the conductive elastomer 833 and the dielectric 831 is obtained between the first electrode and the second electrode of the pressure-sensitive portion 83. That is, the pen pressure can be detected based on the capacitance of the variable capacitor serving as the pressure-sensitive portion 83.

[0070] As described above, the coil member 5 is fitted and joined to the pen pressure detection module 8 via the coil member holder 6 to form the nib-side member. Further, the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8 of the nib-side member is joined to the printed circuit board 10 via the fitting portion 92 of the board holder 9.

[0071] In this embodiment, as Figure 2 shown, the fitting portion 92 of the board holder 9 has a cylindrical shape, and the cylindrical shape has a hollow portion into which the connecting portion 842 of the holder 84 of the pen pressure detection portion 81 of the pen pressure detection module 8 is inserted. Further, as Figure 2 shown, conductor patterns 101 and 102 are formed on the printed circuit board 10 so as to be aligned in such a manner that they are electrically connected to the two terminal members 843 and 844 that connect the two electrodes of the pressure-sensitive portion 83 connected to the connecting portion 842 of the holder 84 of the pen pressure detection portion 81.

[0072] Further, in this embodiment, when the connecting portion 842 of the holder 84 of the pen pressure detection module 8 is inserted into the fitting portion 92 of the board holder 9, it is engaged in such a manner as to contact the upper surface 10a of the printed circuit board 10 housed in the board housing portion 91 of the board holder 9. Thereby, the two electrodes of the pressure-sensitive portion 83 held by the pen pressure detection portion 81 and the conductor patterns 101 and 102 formed on the upper surface 10a of the printed circuit board 10 are electrically connected by the two terminal members 843 and 844 of the connecting portion 842. It should be noted that the conductive patterns 101 and 102 are connected to both ends of a capacitor 103 that forms a resonance circuit together with the coil 51 provided on the upper surface 10a of the printed circuit board 10.

[0073] Further, in this embodiment, as Figure 2 and Figure 5As shown, at the fitting portion 92 of the substrate holder 9, cutouts 92c and 92d are formed to prevent the connecting portions (soldering portions) of one end 51a and the other end 51b of the coil 51 with the terminal members 843 and 844 from interfering with the fitting to the pen pressure detection module 8.

[0074] In addition, in this embodiment, as Figure 3 , Figure 4 in (B) and Figure 5 shown, axial grooves 824a and 824b are formed in the pen pressure transmission member 82 of the pen pressure detection module 8, and axial grooves 845a and 845b that are connected to the grooves 824a and 824b of the pen pressure transmission member 82 are also formed on the circumferential side surface of the holder 84 of the pen pressure detection unit 81.

[0075] Moreover, one end 51a and the other end 51b of the coil 51 of the coil member 5 pass through the grooves 824a, 824b, 845a, and 845b and are soldered and connected to the terminal members 843 and 844 of the connecting portion 842 of the holder 84 of the pen pressure detection unit 81.

[0076] By electrically connecting one end 51a and the other end 51b of the coil 51 to the terminal members 843 and 844 in this way, since the terminal members 843 and 844 are connected to the capacitor 103 of the printed circuit board 10, a resonant circuit composed of the coil 51 and the capacitor 103 is formed, and a variable capacitor composed of the pressure sensing portion 83 is connected in parallel with this resonant circuit. As a result, it is not necessary to extend one end 51a and the other end 51b of the coil 51 to the printed circuit board 10 and perform soldering on the upper surface 10a of the printed circuit board 10.

[0077] In addition, in this embodiment, as Figure 2 and Figure 4 shown in (A), a sealing member 95 is provided at the fitting portion 92 of the substrate holder 9 to block the gap between the inner wall of the hollow portion of the housing 2 when it is housed in the housing 2. Figure 6 The appearance of this sealing member 95 is shown. It is composed of an annular member made of an elastomer (such as rubber). And at the fitting portion 92 of the substrate holder 9, as Figure 4 shown in (A), an annular groove 92a is formed in its circumferential side portion, and the sealing member 95 is fixedly housed in the annular groove 92a. It should be noted that in this embodiment, a protrusion 95a is formed on the sealing member 95 so as to prevent the sealing member 95 from rotating in the circumferential direction of the fitting portion 92, and a cutout 92b for housing the protrusion 95a of the sealing member 95 is formed in a part of the annular groove of the fitting portion 92 (refer to Figure 4(A))。

[0078] Through this sealing member 95, the space for arranging the printed circuit board 10 in the hollow portion inside the outer shell 2 is separated from the space on the side of the opening portion 2a (see Figure 7 ) where the core body 3 protrudes and where the pen pressure detection module 8 is located.

[0079] Moreover, in this embodiment, as Figure 7 shown, as described above, a front cap 4 made of elastic rubber is arranged near the opening portion 2a on the nib side of the hollow portion of the outer shell 2 so as to cover the tapered portion 52b of the ferrite core 52. In this case, when the outer shell cap 21 is fitted to the outer shell 2, the front cap 4 is in a state of being pressed toward the opening portion 2a side of the outer shell 2. Therefore, the front cap 4 serves as a sealing member that seals in such a way as to eliminate the gap between the front end side of the ferrite core 52 of the coil member 5 and the inner wall surface of the hollow portion of the outer shell 2. In this example, as described above, the front cap 4 has a short skirt shape with a flared lower hem. Therefore, as Figure 7 shown, the front cap 4 and the inner wall surface of the outer shell 2 are in close contact at two places, and the dustproof effect and waterproof effect achieved by the seal are improved.

[0080] By the sealing of the opening portion 2a side of the outer shell 2 by this front cap 4, the space connected to the through hole 52a of the ferrite core 52 and the space of the hollow portion inside the outer shell 2 for accommodating the pen module components are separated. The space connected to the through hole 52a of the ferrite core 52 is composed of the concave hole 61a and the through hole 62a of the coil member holder 6 and the hollow portion 821a of the pen pressure transmission member 82, and is closed by the barrier 822 of the pen pressure transmission member 82.

[0081] Moreover, at the fitting portion of the protrusion 62 of the coil member holder 6 and the pen pressure transmission member 82, sealing is ensured by the inner wall surfaces of the hollow portion 821a of the coil member holder 6 and the pen pressure transmission member 82 being in close contact without a gap. Therefore, the space connected to the through hole 52a of the ferrite core 52 becomes an independent space isolated from others except for the opening side of the through hole 52a of the ferrite core 52. It should be noted that in the case of the electromagnetic induction type electronic pen 1 of this embodiment, as Figure 4 (A) shows, only the core body 3 and the pressing member 7 exist in this space, there are no electrical components, and there are no electrical connection parts either.

[0082] Next, with reference to Figure 2 and Figure 8 , the structure on the side opposite to the nib side of the substrate holder 9 (in particular, a structural example of the electrical connection portion between the printed circuit board 10 and the battery 11) will be described. It should be noted that Figure 8 is also a diagram for explaining the process when the battery 11 and the printed circuit board 10 are combined.

[0083] In this embodiment, a lithium-ion battery is used as the battery 11 and it can be charged. As charging methods for the battery 11, there are various methods such as using electromagnetic induction and using electric field coupling, and any method is acceptable.

[0084] The battery 11 in this example has a columnar shape (a cylindrical shape in this example). And, as Figure 2 and Figure 8 shown, the positive electrode conductor 11a and the negative electrode conductor 11b are led out from the end face 11c on one end side in the center line direction of the columnar battery 11, and are housed in the battery housing portion 93 of the substrate holder 9 in a state where the positive electrode conductor 11a and the negative electrode conductor 11b extend toward the printed substrate 10 side.

[0085] In this case, the positive electrode conductor 11a and the negative electrode conductor 11b are led out from the end face 11c of the battery 11 in such a way that their center lines are included in a plane including the center line position of the columnar shape of the battery 11 or a plane parallel to this plane.

[0086] However, in this embodiment, as Figure 2 and Figure 8 shown in (A), (C), and (E) of

[0087] and Figure 2 and Figure 8 shown, the positive electrode conductor 11a and the negative electrode conductor 11b do not extend in a direction orthogonal to the end face 11c of the battery 11, but extend in a state where the distance between the positive electrode conductor 11a and the negative electrode conductor 11b gradually increases as they move away from the end face 11c. That is, the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 are in directions that deviate from each other by a specified acute angle with respect to the center line direction of the columnar battery 11 (i.e., the axis direction of the electronic pen 1).

[0088] On the other hand, as Figure 2 and Figure 8As shown in (A), (C), and (E), the end of the printed circuit board 10 on the battery 11 side in the length direction is formed in a shape having tapered side surfaces 10c and 10d with gradually narrowing widths in accordance with the extending directions of the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11. And, at the end of the upper surface 10a of the printed circuit board 10 on the battery 11 side in this length direction, as Figure 8 shown in (A), a conductor pattern 105 that is one of the power supply terminals is formed along the tapered side surface 10c, and a conductor pattern 106 that is the other of the power supply terminals is formed along the tapered side surface 10d.

[0089] And, in this embodiment, by adopting the above-described structure, as Figure 2 and Figure 8 shown, when the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 are respectively inserted through the through holes 94a and 94b of the wall portion 94 and extend to the substrate accommodation portion 91 side, as Figure 8 shown in (A) to (F), they are in a state of contacting the tapered side surfaces 10c and 10d between the upper surface 10a and the lower surface 10b at the end of the printed circuit board 10 on the battery 11 side in the length direction.

[0090] In this case, in the battery accommodation portion 93 of the substrate holder 9, the battery 11 is not accommodated in such a manner that its end face 11c abuts against the wall portion 94, but is accommodated in such a manner that its end face 11c is in a state of being separated from the wall portion 94 by a predetermined distance d as Figure 8 shown in (A). Therefore, a stepped portion 93b for the end face 11c of the battery 11 to abut against is provided in the battery accommodation portion 93 of the substrate holder 9. Thus, a separation space 96 with an axial distance d is formed between the wall portion 94 and the end face 11c of the battery 11.

[0091] Next, with reference to Figure 8 (A) to (F), the process of combining the battery 11 and the printed circuit board 10 will be described.

[0092] First, as Figure 8 shown in (A), with the printed circuit board 10 accommodated in the substrate accommodation portion 91, the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 are inserted through the through holes 94a and 94b of the wall portion 94, and the battery 11 is accommodated in the battery accommodation portion 93. Then, as described above, the battery 11 is accommodated in the battery accommodation portion 93 in a state of forming a separation space 96 with the wall portion 94, and the front end portions of its positive electrode conductor 11a and negative electrode conductor 11b are in a state of contacting the tapered side surfaces 10c and 10d of the printed circuit board 10.

[0093] Figure 8 (B) is Figure 8The figure when observing the state of (A) from the side direction parallel to the upper surface 10a of the printed circuit board 10 is a side view showing the state in which only a part of the substrate holder 9 is cut away for easy explanation. It should be noted that, as Figure 8 shown in (B) of this embodiment, on the printed circuit board 10, not only on the upper surface 10a but also on the lower surface 10b, electronic components are mounted, such as a control circuit 107 composed of an IC, a wireless communication unit 108 that performs short-range wireless communication according to the Bluetooth (registered trademark) standard, and the like. It should be noted that the wireless communication unit 108, under the control of the control circuit 107, wirelessly communicates with the position detection device 202 to transmit pen pressure information detected by the pen pressure detection unit 81, identification information of the electronic pen 1, etc., and receives an instruction signal from the position detection device 202.

[0094] Next, in a state where the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 are in contact with the conical side surfaces 10c and 10d of the printed circuit board 10 as shown in Figure 8 (C), as an example of an electrical connection fixing means, soldering is performed in this example to electrically connect the conductor patterns 105 and 106 and the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11. The soldering fixing portion formed by soldering is an example of the electrical connection fixing portion.

[0095] Figure 8 The figure of (D) is a figure when observing the state of Figure 8 (C) from the side direction parallel to the upper surface 10a of the printed circuit board 10, and it is a side view showing the state in which only a part of the substrate holder 9 is cut away for easy explanation. It should be noted that in Figure 8 (C) and (D), the soldering fixing portion is shown in black.

[0096] As described above, after the electrical connection between the printed circuit board 10 and the battery 11 is completed, in this embodiment, as shown in Figure 8 (E), resin is filled into the separation space 96 between the end face 11c of the battery 11 and the wall portion 94 in the battery storage portion 93 and cured to form a resin filling portion 97. In addition, resin is also filled on the upper surface 10a and the lower surface 10b of the printed circuit board 10 in the substrate storage portion 91 of the substrate holder 9 to form a resin filling portion 98 and a resin filling portion 99 that cover the upper surface 10a and the lower surface 10b of the printed circuit board 10. In this example, an ultraviolet curable resin is used as the resin.

[0097] Figure 8 The figure of (F) is Figure 8The figure when observing the state of (E) from the side direction parallel to the upper surface 10a of the printed circuit board 10 is a side view showing the state where only a part of the substrate holder 9 is cut for easy explanation. It should be noted that in Figure 8 In (E) and (F), the resin filling portions 98 and 99 are shown with halftones applied.

[0098] It should be noted that in Figure 8 In (E) and (F), it is shown that the upper part of the side switch 104 is also entirely covered with resin. However, in reality, the upper surface of the side switch 104 that is pressed by the pressing operation member 22 of the side switch 104 to perform switch switching is in a state of being exposed without being covered by resin.

[0099] After the pen module in which the nib side member is joined to the fitting portion 92 of the substrate holder 9 that holds the printed circuit board 10 and the battery 11 is formed as described above and is received from the rear end side of the housing 2 into the hollow portion of the housing 2, the rear end side of the housing 2 is closed by the rear end cap 21, and thus, the electronic pen 1 is completed.

[0100] Figure 9 It is a cross-sectional view showing the structure of the rear end side of the housing 2 to which the rear end cap 21 is fitted. However, the battery 11 is not shown in cross-section. As shown in this Figure 9 As shown, the rear end cap 21 has a columnar shape corresponding to the shape of the hollow portion of the housing 2. And in this embodiment, as shown in Figure 9 As shown, an annular sealing member 24 made of an elastic material such as elastic rubber is attached to the columnar shape portion of the rear end cap, and thus, it is sealed in such a way as to eliminate the gap with the inner wall surface of the hollow portion of the housing 2.

[0101] Therefore, in this embodiment, due to the presence of this sealing member 24, it is possible to prevent the intrusion of moisture and dust through the opening on the rear end side of the housing 2, and it is possible to achieve waterproof and dustproof. In addition, as described above, the waterproof and dustproof with respect to the opening on the nib side of the housing 2 can be achieved by the sealing member 95 of the front cap 4 and the fitting portion 92 of the substrate holder 9. And even when there is an opening for the pressing operation member 22 of the side switch 104 in the housing 2, since the upper surface 10a and the lower surface 10b of the printed circuit board 10 are covered with the resin filling portions 98 and 99, and the separation space 96 between the end face 11c of the battery 11 and the wall portion 94 is covered with the resin filling portion 97, it has become a waterproof and dustproof structure respectively.

[0102] And in this embodiment, since it is a structure in which the force from the nib side is received in the axial direction of the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 and the part of the separation space 96 is used for receiving, the battery 11 can achieve the effects of impact resistance and reduction of pressure on the positive and negative electrode conductors.

[0103] Further, in this embodiment, a wall portion 94 is provided between the substrate accommodating portion 91 and the battery accommodating portion 93 of the substrate holder 9. The axial force applied to the printed circuit board 10 by the pen pressure and impact load applied to the core 3 is borne by the wall portion 94 against which the rear end portion of the printed circuit board 10 abuts, and is not directly applied to the battery 11. Further, even if an axial force is applied to the battery 11, it is absorbed by the separation space 96 between the end face 11c of the battery 11 and the wall portion 94, and the applied force is reduced.

[0104] Moreover, since the positive electrode conductor 11a and the negative electrode conductor 11b extend in a direction inclined with respect to the axial direction, their resistance to forces in the axial direction is increased. That is, when the positive electrode conductor 11a and the negative electrode conductor 11b are led out in a direction perpendicular to the end face 11c of the battery 11 and parallel to the axial direction, the axial force is directly received by the positive electrode conductor 11a and the negative electrode conductor 11b. In contrast, when the positive electrode conductor 11a and the negative electrode conductor 11b extend in a direction inclined with respect to the axial direction, the force in the axial direction is divided into a force in the axial direction and a force in a direction orthogonal to the axial direction according to the inclination angle, and thus the received force is smaller than when all of the axial force is received.

[0105] Further, the front end portions of the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 are in contact with the tapered side surfaces 10c and 10d of the rear end portion of the printed circuit board 10, and are soldered and electrically connected and fixed at this portion, so that the front end portions of the positive electrode conductor 11a and the negative electrode conductor 11b are engaged with the tapered side surfaces 10c and 10d. Therefore, the effects of greater shock resistance and reduced pressure on the positive and negative electrode conductors can be obtained with respect to the battery 11.

[0106] Moreover, in this embodiment, since the separation space 96 including the root portions of the positive electrode conductor 11a and the negative electrode conductor 11b between the end face 11c of the battery 11 and the wall portion 94 is solidified by the resin filling portion 97, the battery 11 has greater resistance to forces in the axial direction. Further, as described above, the resin filling portion 97 also has the effect of functioning as dustproof and waterproof for the root portions of the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11.

[0107] [Other embodiments or modification examples]

[0108] It should be noted that in the above-described embodiment, the front end portion sides of the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 are configured to be in contact with the tapered side surfaces 10c and 10d of the rear end portion of the printed circuit board 10, but as Figure 10As shown in (A) and (B), the front end portions of the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 may also be in contact with one of the upper surface 10Aa and the lower surface 10Ab of the printed circuit board 10A (the upper surface 10Aa in the example of Figure 10 ), and are electrically connected and fixed. It should be noted that, as shown in (B) of Figure 10 , in this example of Figure 10 , a tapered side surface is not formed at the rear end portion of the printed circuit board 10A, and the rectangular shape is maintained.

[0109] Figure 10 Figure (A) is the same as Figure 8 Figure (D), which shows the vicinity of the connection and fixing portion of the printed circuit board 10A and the battery 11 in a state where a part of the substrate holder 9 is cut away. In addition, Figure 10 Figure (B) is the same as Figure 8 Figure (C), which is a view of the state of Figure 10 Figure (A) when viewed from the upper surface 10Aa side of the printed circuit board 10A.

[0110] As shown in (A) and (B) of these Figure 10 , in this example, the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 are inserted through the through holes 94Aa and 94Ab of the wall portion 94A and extend toward the substrate receiving portion 91, and are in contact with the upper surface 10Aa of the printed circuit board 10A received in the substrate receiving portion 91. In this case, as shown in (B) of Figure 10 , on the upper surface 10Aa of the printed circuit board 10A, conductor patterns 105A and 106A that constitute one and the other of the power supply terminals are formed at positions in contact with the positive electrode conductor 11a and the negative electrode conductor 11b.

[0111] Then, as shown in (A) and (B) of Figure 10 , the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 that are in contact with the conductor patterns 105A and 106A on the printed circuit board 10A are soldered (shown in black in (A) and (B) of Figure 10 ), and the two are electrically connected and fixed.

[0112] After that, in the same manner as shown in (E) and (F) of Figure 8 , the separation space 96 between the wall portion 94 and the end face 11c of the battery 11 is filled with an ultraviolet curable resin, and the upper surface 10Aa and the lower surface 10Ab of the printed circuit board 10A are covered with resin.

[0113] Through this example of Figure 10 , the same effects as described above can also be obtained.

[0114] In addition, asFigure 11 As shown in (A) and (B), it is also possible to configure one of the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 to be in contact with the upper surface 10Ba of the printed circuit board 10B and the other to be in contact with the lower surface 10Bb of the printed circuit board 10B, and to configure them to be electrically connected and fixed respectively. It should be noted that, as Figure 11 shown in (B) of Figure 11 In this example, a tapered side surface is not formed at the rear end portion of the printed circuit board 10B, and the rectangular shape is maintained, and one conductor pattern 105B and the other conductor pattern 106B constituting the power supply terminals are formed on the upper surface 10Ba and the lower surface 10Bb of the printed circuit board 10B, respectively.

[0115] Figure 11 (A) of Figure 8 is the same as (D) of Figure 11 and is a view showing the vicinity of the connection and fixing portion of the printed circuit board 10B and the battery 11 in a state where a part of the substrate holder 9 is cut away. In addition, Figure 8 is the same as (C) of Figure 11 and is a view when the state of (A) of

[0116] is observed from the upper surface 10Ba side of the printed circuit board 10B. Figure 11 As shown in (A) and (B) of these Figure 11 in this example, the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 also insert through the through holes 94Ba and 94Bb of the wall portion 94B and extend toward the substrate housing portion 91 side. In this case, the through holes 94Ba and 94Bb are not formed in a direction parallel to the upper surface 10Ba of the printed circuit board 10B, but are formed at slightly different positions in the height direction of the wall portion 94B as shown in (A) of

[0117] And, in this case, as Figure 11 shown in (B) of

[0118] a conductor pattern 105B constituting one of the power supply terminals is formed on the upper surface 10Ba of the printed circuit board 10B at a position in contact with the front end portion of the positive electrode conductor 11a, and a conductor pattern 106B constituting the other of the power supply terminals is formed on the lower surface 10Bb of the printed circuit board 10B at a position in contact with the front end portion of the negative electrode conductor 11b. Figure 11As shown in (A) and (B), the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 that are in contact with the conductor patterns 105B and 106B on the printed circuit board 10B are soldered (blackened and shown in (A) and (B)), and the two are electrically connected and fixed. Figure 11 After that, in the same manner as shown in (E) and (F), the separation space 96 between the wall portion 94 and the end face 11c of the battery 11 is filled with an ultraviolet curable resin, and the upper surface 10Ba and the lower surface 10Bb of the printed circuit board 10B are covered with resin.

[0119] After that, similar to Figure 8 As shown in (E) and (F), the separation space 96 between the wall portion 94 and the end face 11c of the battery 11 is filled with an ultraviolet curable resin, and the upper surface 10Ba and the lower surface 10Bb of the printed circuit board 10B are covered with resin.

[0120] Through this Figure 11 example, the same effects as above can also be obtained.

[0121] It should be noted that in the above embodiment, through holes 94a, 94b, 94Ba, and 94Bb are used as the through portions formed in the wall portions 94 and 94B. However, as the through portions formed in the wall portions, they are not limited to through holes, and can also be through grooves as Figure 12 shown.

[0122] That is, Figure 12 shows a cross-section of the battery housing portion 93 of the substrate holder 9. The wall portion 94C in this example includes through grooves 94Ca and 94Cb for allowing the positive electrode conductor 11a and the negative electrode conductor 11b of the battery 11 to penetrate the wall portion 94C and extend toward the substrate housing portion 91 side. In this example, when filling the resin into the separation space 96 or covering the upper surfaces 10a and 10Ba of the printed circuit boards 10 and 10B with resin, the resin also enters the through grooves 94Ca and 94Cb and covers the positive electrode conductor 11a and the negative electrode conductor 11b.

[0123] [Other Embodiments]

[0124] The above embodiments are for the case where the electronic pen is of the electromagnetic induction type, but the present invention can also be applied to the case of an active electrostatic type electronic pen. That is, in the case of an active electrostatic type electronic pen, only "in the tip-side member, it is configured to include a conductive core instead of the ferrite core around which the coil is wound, and the electronic circuit formed on the printed circuit board includes a signal generation circuit that generates a signal sent from the conductive core to the position detection sensor of the position detection device" and the like are different, and other structures can be made the same.

[0125] If referring to Figure 2Taking the example of [description] to illustrate the structure of the active electrostatic stylus, it can be configured as follows: The printed circuit board 10 with the electronic circuit for the active electrostatic stylus is housed in the substrate housing portion 91 of the substrate holder 9, and the battery 11 is housed in the battery housing portion 93 to form the electrical coupling portion as described above. Also, the structure in which the pen pressure detection module 8 is fitted into the fitting portion 92 of the substrate holder 9 can be set the same way.

[0126] Moreover, it can be configured such that the core 3 is a conductive member, and instead of the ferrite core wound with a coil, a shielding member such as a metal tube that penetrates the core and electrostatically shields the core is fitted to the pen pressure detection module. In this case, it can be set to the structure where the front cap 4 is placed on the front end of the shielding member.

[0127] Reference Numeral Explanation

[0128] 1... Electronic Pen, 2... Outer Shell (Housing), 3... Core, 4... Front Cap, 5... Coil Member, 8... Pen Pressure Detection Module, 9... Substrate Holder, 10, 10A, 10B... Printed Circuit Boards, 11... Battery, 11a, 11b... Positive and Negative Electrode Conductors, 11c... End Face of Battery 11, 21... Rear Cap, 24... Sealing Member, 91... Substrate Housing Portion, 92... Fitting Portion, 93... Battery Housing Portion, 94... Wall Portion, 95... Sealing Member.

Claims

1. An electronic pen, characterized in that, the electronic pen comprises: a cylindrical housing; a circuit board disposed in a hollow portion of the cylindrical housing such that an axial direction of the housing becomes a length direction of the circuit board; an electronic circuit portion disposed on the circuit board; and a battery having a columnar shape and disposed in the hollow portion of the housing on a side opposite to a nib side of the circuit board in an axial direction in a state where a positive electrode conductor and a negative electrode conductor led out from one end face in a center line direction of the columnar shape extend toward the circuit board side, the battery is disposed in a state where there is a separation space between one end face in the center line direction of the columnar shape from which the positive electrode conductor and the negative electrode conductor are led out and an end portion in the length direction of the circuit board, and front end sides of the positive electrode conductor and the negative electrode conductor are in contact with the circuit board, the electronic pen is configured such that the circuit board is electrically connected to the front end sides of the positive electrode conductor and the negative electrode conductor through a soldering portion, and a voltage of the battery is supplied as a power supply voltage to the electronic circuit portion.

2. The electronic pen according to claim 1, characterized in that, at least a root side of the positive electrode conductor and a root side of the negative electrode conductor of the separation space are covered with resin.

3. The electronic pen according to claim 1, characterized in that, the positive electrode conductor and the negative electrode conductor of the battery extend toward the circuit board side through a through portion formed in a wall portion provided at an intermediate portion in the axial direction of the housing in the separation space.

4. The electronic pen according to claim 3, characterized in that, a space between at least the wall portion and one end face in the center line direction of the columnar shape from which the positive electrode conductor and the negative electrode conductor of the battery are led out in the separation space is filled with resin.

5. The electronic pen according to claim 4, characterized in that, a surface of the circuit board on which the electronic circuit portion is formed and located on a side closer to the nib than the wall portion includes a soldering portion connected to the front end sides of the positive electrode conductor and the negative electrode conductor of the battery and is covered with resin.

6. The electronic pen according to claim 2, 4 or 5, characterized in that, the resin is an ultraviolet curable resin.

7. The electronic pen according to claim 1, characterized in that, the positive electrode conductor and the negative electrode conductor of the battery extend in a direction parallel to an upper surface of the circuit board, and a distance between the positive electrode conductor and the negative electrode conductor increases as they move away from one end face in the center line direction of the battery.

8. The electronic pen according to claim 1, characterized in that, front end sides of the positive electrode conductor and the negative electrode conductor of the battery are in contact with the circuit board at a side end face between an upper surface and a lower surface of the circuit board.

9. The electronic pen according to claim 8, characterized in that, The positive electrode conductor and the negative electrode conductor of the battery extend in a direction parallel to the upper surface of the circuit board, and the distance between the positive electrode conductor and the negative electrode conductor increases as they move away from one end face in the center line direction of the battery. The end of the circuit board on the side in contact with the positive electrode conductor and the negative electrode conductor of the battery is formed in a shape with a gradually narrowing width so that it contacts the front end portions of the positive electrode conductor and the negative electrode conductor of the battery on the side end face.

10. The electronic pen according to claim 1, characterized in that The surface of the circuit board on which the electronic circuit portion is formed includes a soldering portion connected to the front end side of the positive electrode conductor and the front end side of the negative electrode conductor of the battery and is covered with resin.

11. The electronic pen according to claim 3 or 4, characterized in that The circuit board and the battery are arranged in the axial direction in a state separated by the wall and are housed in a holder having a boat-like shape and provided with the wall portion.

12. The electronic pen according to claim 11, characterized in that A fitting portion for fitting a tip-side member is formed on the tip side of the holder, and the fitting portion is formed in a structure of a cylindrical portion, and a ring-shaped sealing member elastically in contact with the inner wall surface of the housing is mounted on the outer peripheral surface of the cylindrical portion.

13. The electronic pen according to claim 12, characterized in that A rear end member is provided on the side of the housing opposite to the circuit board side of the battery, and the rear end member includes a ring-shaped sealing member elastically in contact with the inner wall surface of the housing.

14. The electronic pen according to claim 1, characterized in that The electronic pen includes a coil wound around a ferrite core on the tip side, and a capacitor connected in parallel with the coil in the electronic circuit portion to form a resonance circuit, and is formed in an electromagnetic induction type structure.

15. The electronic pen according to claim 14, characterized in that A ring-shaped sealing member elastically in contact with the tip side of the ferrite core and the inner wall surface of the housing is installed.

16. The electronic pen according to claim 1, characterized in that The electronic pen includes a conductive core on the tip side, and a signal generation circuit that generates a signal sent through the core in the electronic circuit portion, and is formed in a capacitive touch type structure.

17. The electronic pen according to claim 1, characterized in that The battery is a lithium ion battery.

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