JP2021103457A - Electronic pen - Google Patents

Abstract

To prevent one-sided wear of a pen tip of an electromagnetic induction stylus.SOLUTION: An electronic pen includes an electromagnetic induction stylus (20) as an only refill disposed in a barrel, and a delivery mechanism (40) for moving the stylus forward and backward. The delivery mechanism has a spring (44) for energizing the stylus backward. When the stylus is located at an advance position (a position at which a front end projects from a tip part of the barrel), the front end of the spring is located behind the rearer one between a rear end of a coil (22) constituting a resonance circuit incorporated in the stylus and, if there is a magnetic material attached to the coil, its rear end. The delivery mechanism includes a knock body (48) and a rotation transmission mechanism that has a rotary cam (41) to rotate at a prescribed angle each time the knock body is operated and rotates the stylus by transmitting rotational movement of the rotary cam.SELECTED DRAWING: Figure 1

Description

The present invention relates to a single-core electronic pen with an electromagnetic induction stylus.

In recent years, data has been input to a personal computer, a tablet terminal, or the like by moving an electronic pen as a pointing device on an input panel such as a display provided with a position detection device. An electromagnetic induction type pen is known as an electronic pen.

Patent Document 1 discloses a knock-type electronic pen in which a single electromagnetic induction stylus is housed in a barrel. The pen tip portion of the electromagnetic induction stylus is formed of a protective material made of a resin material that covers the tip portion of the ferrite core in which the coil is not wound. When using an electronic pen, the resin material that constitutes the pen tip wears by sliding on the surface of the input panel. As the wear progresses and the pen tip is worn out, the usability of the electronic pen deteriorates.

International Publication WO2016 / 031329 Pamphlet

An object of the present invention is to provide a single-core electronic pen having a configuration capable of dealing with the problem of uneven reduction of the pen tip portion of an electromagnetic induction stylus.

According to one embodiment of the present invention, a shaft cylinder having a front end at the front end, a unique refill arranged in the shaft cylinder, a forward position where the front end of the refill protrudes from the front mouth, and the front mouth. It is a feeding mechanism that advances and retreats the refill so that it can take a retracted position to the back of the refill, and includes a feeding mechanism having a spring that urges the refill backward, and the refill is an electromagnetic induction type. It consists of a stylus, and when the electromagnetic induction stylus is in the forward position, the front end of the spring is attached to the rear end of a coil constituting the resonance circuit built in the electromagnetic induction stylus, or to the coil. If a magnetic material is present, it is located behind the rear end of the rear end, and the feeding mechanism provides a knock body and a rotary cam that rotates by a predetermined angle each time the knock body is operated. Provided is an electronic pen having a rotation transmission mechanism for rotating the refill by transmitting the rotational movement of the rotation cam.

The electronic pen described above may further include one or a combination of two or more of the following features:
(1) The electronic pen further includes an attachment provided between the rotary cam and the refill in the barrel, the refill is press-fitted into the front end of the attachment, and the spring is attached to the attachment. The attachment and the refill are provided so as to urge the attachment and the refill toward the rear end side of the axle via a spring seat surface provided on the outer peripheral portion, and the rotation transmission mechanism is a meshing portion provided on the rotation cam. And the meshing portion provided on the attachment, and the meshing portion of the rotary cam and the meshing portion of the attachment are meshed so as to be able to transmit rotation.
(2) The electromagnetic induction stylus has a pen core and a mounting portion into which the pen core can be detachably inserted, and when the electromagnetic induction stylus is in the forward position, the said. The pen core can be gripped and pulled out from the mounting portion.
(3) In the above (2), the pull-out load required to pull out the refill from the attachment is larger than the pull-out load required to pull out the pen core from the stylus body.
(4) The electronic pen is provided in the barrel, further includes an attachment that is advanced and retracted by the feeding mechanism, and the refill made of the electromagnetic induction stylus has a first shape dimension, and the attachment. A first holding portion capable of holding the rear end portion of the electromagnetic induction stylus is provided at the front end portion of the attachment, and a rear end portion of another refill having a second shape dimension can be held at the rear end portion of the attachment. A second holding portion is provided, and the attachment can be arranged in the barrel with the front and back reversed so that the attachment can be moved forward and backward by the feeding mechanism, thereby replacing the electromagnetic induction stylus. Therefore, the other refill can be arranged in the stylus.
(5) In the above (4), the attachment is provided between the rotary cam and the refill in the barrel, and the rotary cam is provided with a first meshing portion and a second meshing portion, and the attachment. A front meshing portion capable of engaging with the first meshing portion and transmitting the rotational movement of the rotary cam to the attachment is provided at the front end portion of the attachment, and the second meshing portion is provided at the rear end portion of the attachment. A rear meshing portion is provided which can mesh with and transmit the rotational motion of the rotary cam to the attachment.

According to the above embodiment, the feeding mechanism has a knock body and a rotary cam that rotates by a predetermined angle each time the knock body is operated, and a rotary transmission mechanism that rotates the refill by transmitting the rotational motion of the rotary cam. Therefore, it is possible to prevent or suppress uneven reduction of the tip of the electromagnetic induction type stylus.

It is a vertical cross-sectional view which shows the structure of one Embodiment of the single-core type electronic pen which provided the electromagnetic induction type stylus as a refill. It is a vertical cross-sectional view of an electronic pen which shows the state which replaced the electromagnetic induction stylus of FIG. 1 with a pole pen refill. It is a vertical cross-sectional view of the electronic pen which shows the state which replaced the electromagnetic induction type stylus of FIG. 1 with a pressure sensitive type stylus. It is a vertical cross-sectional view of the electronic pen which shows the state which replaced the electromagnetic induction type stylus of FIG. 1 with a capacitance type stylus. It is a figure which shows the structure of the rotary cam and the attachment, (a) is the vertical sectional view of the rotary cam, (b) is the bottom view of the rotary cam seen from the direction of the arrow (b) of (a), (c) is (D) is a top view of the attachment seen from the direction of the arrow (c), (d) is a vertical sectional view of the attachment, and (e) is a bottom view of the attachment seen from the direction of the arrow (e) of (d). is there. It is the schematic which shows the internal structure of the electromagnetic induction type stylus.

A suitable and non-limiting embodiment of the single-core electronic pen will be described below with reference to the drawings.

As shown in FIG. 1, the electronic pen includes a barrel 10 having a tip 13 at the front end, an electromagnetic induction stylus 20 as a refill, an attachment 30, and a feeding mechanism 40.

Unless otherwise noted in this specification.
− “Axial direction (also called front-back direction)” means the direction in which the central axis of the barrel 10 extends.
− “Radial direction” or “diameter direction” means the direction orthogonal to the central axis of the barrel 10.
− “Circular direction” means the direction of the circumference of a circle centered on an arbitrary point on the central axis.
− “(Axial direction) front side” means the side of the tip 13 in the axial direction.
-"(Axial direction) rear side" means the side opposite to the front opening 13 (the side of the knock body 48).

The axle cylinder 10 has a front axle cylinder portion 11 and a rear axle cylinder portion 12 that is detachably connected to the front axle cylinder portion 11. A front opening 13 is formed at the front end of the front axle tube portion 11. The front barrel portion 11 has a base portion 11A formed of a resin material and a rubber grip portion 11B overlaid on the base portion 11A at the central portion in the length direction of the base portion 11A. The grip portion 11B is a grip portion that is gripped by the handle of the user.

A male screw 14 is formed at the rear end portion of the front axle cylinder portion 11, and the male screw 14 is screwed with the female screw 15 formed at the front end portion of the rear axle cylinder portion 12 to form a male screw 14 with the front axle cylinder portion 11. The rear axle cylinder portion 12 can be connected.

An electromagnetic induction stylus 20 as a refill is arranged on the front side portion in the barrel 10. The rear end portion of the electromagnetic induction stylus 20 is press-fitted into the front end portion (first holding portion 31) of the attachment 30. The rear end portion of the attachment 30 is engaged with the rotary cam 41 of the feeding mechanism 40, and the rotation of the rotary cam 41 is transmitted to the attachment 30. This point will be described in detail later.

The feeding mechanism 40 using the rotary cam 41 used in the present embodiment is a well-known one widely used in a single-core ballpoint pen. Hereinafter, the feeding mechanism 40 will be briefly described. In the following description, the components clearly appearing in FIGS. 1 and 5 are designated by reference numerals, but the other components will be described only by wording. A plurality of guide members extending in the axial direction, which are arranged at equal intervals in the circumferential direction, are provided on the inner peripheral surface of the rear axle cylinder portion 12. Two cam surfaces are formed at the front end of each guide member. A plurality of protrusions 48A are formed on the outer peripheral surface of the front side portion of the knock body 48 at equal intervals in the circumferential direction, and each protrusion 48A of the knock body 48 is engaged with a guide groove 45 formed between adjacent guide members. It fits. As a result, the knock body 48 can move in the axial direction and cannot rotate in the circumferential direction. Cam surfaces are formed at the front end of the knock body 48 at equal intervals in the circumferential direction. The rotary cam 41 is urged rearward by a spring 44 (via an attachment 30 described below). The outer peripheral surface of the rotary cam 41 is provided with protrusions 46 (see FIG. 5) extending in the axial direction at equal intervals in the circumferential direction), and these protrusions 46 also enter the guide groove 45 described above. be able to. A cam surface 46A (see FIG. 5) is formed at the rear end of each protrusion 46 of the rotary cam 41. Each time the knock body 48 is knocked, the cam surface 46A of the rotary cam 41 slides on the cam surface of the knock body 48, and then slides on the cam surface of the guide member, so that the rotary cam 41 rotates by a predetermined angle. .. The first knock locks the cam surface of the rotary cam 41 between two adjacent cam surfaces of each guide member, thereby holding the attachment 30 and the refill (20, 60, 70, 80) in the forward position. To. By the second knock, each protrusion 46 of the rotary cam 41 falls into the guide groove 45, whereby the refill is retracted to the retracted position. When the refill is in the forward position, the tip of the refill protrudes forward from the front opening 13 as shown in FIGS. 1 to 4, and when the refill is in the backward position, the entire refill is stored in the barrel 10 (FIG. 4). Not shown).

As shown in FIGS. 1 to 4 and 5 (d), the attachment 30 has a first holding portion 31 and a second holding portion 32. The first holding portion 31 has a shape and dimension suitable for engaging with the rear end portion of the electromagnetic induction stylus 20. The second holding portion 32 has a shape dimension suitable for engaging with the rear end portion of another refill having a shape dimension different from that of the electromagnetic induction stylus 20. In the present embodiment, as other refills, a pole pen refill 60, a pressure-sensitive stylus 70, and a capacitive stylus 80 can be used. For this reason, the shape dimensions of the rear ends of these refills 60, 70, 80 are set to be substantially the same as each other. Further, the total lengths of the refills 60, 70, and 80 are also set to be substantially the same as each other.

FIG. 1 shows a state in which the electromagnetic induction stylus 20 as a refill is arranged in the barrel 10. In FIG. 1, the attachment 30 is arranged in the barrel 10 so that the first holding portion 31 is located on the front side and the second holding portion 32 is located on the relatively rear side.

As shown in FIG. 1, the first holding portion 31 of the attachment 30 is formed of a cylindrical portion provided at the end in the first axial direction of the attachment 30. The inner diameter of the first holding portion 31 (first diameter φ1 (see FIG. 5)) is slightly smaller than the diameter of the rear end portion of the electromagnetic induction stylus 20. Therefore, by pushing the electromagnetic induction stylus 20 in the axial direction with respect to the first holding portion 31, the rear end portion of the electromagnetic induction stylus 20 is fitted (press-fitted) into the first holding portion 31 of the attachment 30. As a result, the electromagnetic induction stylus 20 is coupled to the attachment 30. At least one of the rear end portion of the electromagnetic induction stylus 20 and the attachment 30 is made of a material having an elastic deformability capable of press-fitting, for example, a resin material.

FIGS. 2 to 4 show states in which the refills 60, 70, and 80 are housed in the barrel 10. At this time, the attachment 30 is arranged in the axle cylinder 10 so that the first holding portion 31 is located on the rear side and the second holding portion 32 is located on the front side.

As shown in FIGS. 2 to 4 and 5 (d), in the present embodiment, the second holding portion 32 of the attachment 30 is composed of a cylindrical portion provided at the second axial end portion of the attachment 30. The inner diameter of the second holding portion 32 (second diameter φ2 (see FIG. 5)) is larger than the above-mentioned first diameter. At the back of the inner peripheral surface of the second holding portion 32 (the side far from the opening end), a plurality of protrusions 32A extending in the axial direction are provided at equal intervals in the circumferential direction. The diameter of the inscribed circle at the inner end of the protrusion 32A is slightly smaller than the outer diameter of the refills 60, 70, 80. Therefore, by pushing the rear end portions of the refills 60, 70, 80 in the axial direction with respect to the second holding portion 32, the rear end portions of the refills 60, 70, 80 are fitted (press-fitted) into the protrusion 32A. As a result, the refills 60, 70, 80 are coupled to the attachment 30. A protrusion similar to the protrusion 32A may be provided on the inner peripheral surface of the first holding portion 31. At least one of the rear ends of the refills 60, 70, 80 and the attachment 30 is made of a material having elastic deformability to the extent that press-fitting is possible, for example, a resin material.

A ring-shaped protrusion 33 is formed at the central portion of the attachment 30 in the axial direction. The diameter of the outer peripheral surface of the ring-shaped protrusion 33 is slightly smaller than the inner diameter of the rear axle cylinder portion 12. Therefore, the ring-shaped protrusion 33 can smoothly slide in the rear axle cylinder portion 12 in the axial direction and does not fall in the axial direction. Both ends of the ring-shaped protrusion 33 in the axial direction are a ring-shaped first spring seating surface 33A and a second spring seating surface 33B facing the axial direction.

The spring 44 constituting the feeding mechanism 40 is provided so as to urge the refills 20, 60, 70, 80 rearward via the attachment 30. Specifically, the front end of the spring 44 can be seated on the axle tube 10 itself or on a surface facing the rear of a member fixed to the axle tube 10, and in the illustrated embodiment, the front axle tube portion 11 It is seated on the rear end surface 11E. The rear end of the spring 44 is seated on the first spring seating surface 33A in FIG. 1 and on the second spring seating surface 33B in FIGS. 2 to 4. In FIGS. 1 to 4, the refills (20, 60, 70, 80) are in the forward positions, and the spring 44 is in a compressed state before the refill is fed out.

As can be understood by comparing FIG. 1 with FIGS. 2 to 4, when the first holding portion 31 of the attachment 30 is on the front side when the refill (20, 60, 70, 80) is in the forward position. The axial position of the first spring seating surface 33A and the axial position of the second spring seating surface 33B when the second holding portion 32 is on the front side are the same. That is, the displacement amount (compression amount) of the spring 44 is the same in the state shown in FIG. 1 and the state shown in FIGS. 2 to 4. The attachment 30 is designed so that such a relationship is established, so that the feeling when pushing the knock body 48 is almost the same regardless of the refill (20, 60, 70, 80) used. it can.

Further, the axial position of the first spring seat surface 33A when the first holding portion 31 of the attachment 30 is on the front side and the axial position of the second spring seat surface 33B when the second holding portion 32 is on the front side. In this case, since the displacement amount (compression amount) of the spring 44 is different, the feeling when pushing the knock body 48 can be changed. With this, it is possible to discriminate the refills that are attached based on the difference in knock feeling, and to adjust so that the optimum knock feeling is obtained according to the type of refill.

As shown in FIGS. 5 (d) and 5 (e), the first axial end surface 34A of the attachment 30 is formed with a recess (meshing portion) 34A1 extending so as to cross the first axial end surface 34A in the radial direction. There is. Further, as shown in FIGS. 5 (c) and 5 (d), a recess 34B1 (meshing portion) extending in the diameter direction is formed on the end surface 34B in the second axial direction.

As shown in FIGS. 5A and 5B, the rotary cam 41 of the feeding mechanism 40 is provided with a small-diameter first ring-shaped end surface 42A and a large-diameter second ring-shaped end surface 42B facing forward in the axial direction. Has been done. The first and second ring-shaped end faces 42A and 42B are concentric with each other. Further, the first and second ring-shaped end faces 42A and 42B are located at different axial positions from each other, whereby a step is formed between the first and second ring-shaped end faces 42A and 42B.

A plurality of (two in the illustrated example) convex portions (meshing portions) 42A1 are formed on the first ring-shaped end surface 42A at equal intervals in the circumferential direction. The plurality of convex portions 42A1 are arranged so as to be able to mesh with the plurality of concave portions 34A1 of the first axial end surface 34A of the attachment 30. The rotational movement of the rotary cam 41 can be transmitted to the attachment 30 via the convex portion 42A1 and the concave portion 34A1 that mesh with each other, and therefore can also be transmitted to the refill (20) press-fitted into the attachment 30. Therefore, each time the knock body 48 is operated, the refill (20) rotates by a predetermined angle.

A plurality of (two in the illustrated example) convex portions 42B1 (meshing portions) are formed on the second ring-shaped end surface 42B at equal intervals in the circumferential direction. The plurality of convex portions 42B1 are arranged so as to be able to mesh with the plurality of concave portions 34B1 of the second axial end surface 34B of the attachment 30. The rotational movement of the rotary cam 41 can be transmitted to the attachment 30 via the convex portion 42B1 and the concave portion 34B1 that mesh with each other, and therefore, also transmitted to the refills (60, 70, 80) press-fitted into the attachment 30. Can be done. Therefore, each time the knock body 48 is operated, the refill (60, 70, 80) rotates by a predetermined angle.

In this way, the refill (20, 60, 70, 80) rotates by a predetermined angle each time the knock body 48 is operated, so that the tip of the refill does not wear unevenly. Therefore, the life of the refill can be extended.

Regardless of which of the first axial end face 34A and the second axial end face 34B of the attachment 30 is located on the front side, and whether the refill (20, 60, 70, 80) is in the forward position or the backward position. Regardless of the presence, the attachment 30 is constantly pressed against the rotary cam 41 by the spring 44. Therefore, the meshing with the convex portion (42A1, 42B1) and the concave portion (34A1, 34B1) is always maintained.

In the illustrated embodiment, the attachment 30 is provided with recesses (34A1, 34B1) as meshing portions, and the rotary cam 41 is provided with meshing portions and convex portions (42A1, 42B1). Which side of 30 and the rotary cam 41 is provided is arbitrary. Further, the shape of the meshing portion is arbitrary as long as the rotational motion can be transmitted between the attachment 30 and the rotary cam 41.

The shape and dimensions of the attachment 30 so that the tip of the refill protrudes from the tip 13 with a protrusion length suitable for use when the refill is in the forward position regardless of the refill (20, 60, 70, 80) used. Is set in consideration of the following points, etc .:
(1) Overall length of refill (20) and refill (60, 70, 80) (refill 60, 70, 80 is longer in the illustrated embodiment);
(2) Appropriate amount of protrusion of each refill (20, 60, 70, 80) from the tip 13 during use;
(3) Axial overlap length (insertion amount) between the rear end portion of the refill (20) and the first holding portion 31 of the attachment 30, and the rear end portion of the refill (60, 70, 80) and the second attachment 30. Axial overlap length with the holding portion 32 (the latter is longer in the illustrated embodiment);
(4) Axial overlap length (insertion amount) between the rotary cam 41 and the first holding portion 31 of the attachment 30 and the axial overlap length (shown) between the rotary cam 41 and the second holding portion 32 of the attachment 30. In the embodiment, the former is larger and the latter is zero).
In addition to the above, the thickness of the refill (20) and the rear end of the refill (60, 70, 80) (in the illustrated embodiment, the refills 60, 70, 80 are thicker) is also the shape of the attachment 30. It is taken into consideration when determining the dimensions.

In the above embodiment, the refill held by the first holding portion 31 of the attachment 30 is the electromagnetic induction stylus 20, and the refill held by the second holding portion 32 is a type of refill other than the electromagnetic induction stylus 20. It was 60, 70, 80), but it is not limited to this. The refill held by the first holding portion 31 and the second holding portion 32 of the attachment 30 may both be an electromagnetic induction stylus (however, the shape and dimensions are different from each other), and both are of a type other than the electromagnetic induction stylus. (However, the shape and dimensions are different from each other). That is, a technique of switching the front and back of the attachment 30 to correspond to refills having different shapes and dimensions is useful regardless of the type of refill.

As schematically shown in FIG. 6, the electromagnetic induction stylus 20 includes an LC resonance circuit including a coil 22 and a capacitor 24. A large number of sensor coils are provided on an input panel (not shown) configured to enable input by the electromagnetic induction stylus 20. The alternating magnetic field formed by the sensor coil causes an induced electromotive force in the coil 22 of the electromagnetic induction stylus 20. The magnetic flux formed by the coil 22 of the electromagnetic induction stylus 20 due to the induced electromotive force is detected by a large number of sensor coils provided on the input panel, and the position of the tip of the electromagnetic induction stylus 20 on the input panel is based on the detection result. Is identified. This operating principle is well known in the field of electromagnetic induction stylus and is described in, for example, Patent Document 1, and further detailed description thereof will be omitted.

If a spring 44 made of a metal material of the feeding mechanism 40 for urging the electromagnetic induction stylus 20 rearward is arranged around the coil 22 of the electromagnetic induction stylus 20, the operation of the electromagnetic induction stylus 20 is adversely affected. As a matter of fact, when a metal spring was arranged around the coil 22 of the electromagnetic induction stylus 20 in one configuration example, the electromagnetic induction stylus did not operate normally. Therefore, the front end of the spring 44 is preferably located behind the rear end of the coil 22 of the electromagnetic induction stylus 20. If the coil 22 has a core material made of a magnetic material such as ferrite and the rear end of the core material is behind the rear end of the coil 22, the front end of the spring 44 is the core material. It is preferably located behind. In the embodiment shown in FIG. 1, the spring 44 is always located behind the rear end of the electromagnetic induction stylus 20 and is far away from the coil 22, which adversely affects the operation of the electromagnetic induction stylus 20. There is no fear.

As schematically shown in FIG. 6, the electromagnetic induction stylus 20 has a pen core 26 penetrating the central cavity of the coil 22. The tip of the pen core 26 corresponds to the above-mentioned pen tip. The rear end portion of the pen core 26 is press-fitted into the mounting portion 28. In one embodiment, the pen core 26 is an elongated cylindrical shape as a whole, and the attachment portion 28 is a member having a cylindrical recess having an inner diameter slightly smaller than the outer diameter of the rear end portion of the pen core 26. The pen core 26 is attached to the attachment portion 28 with the rear end of the pen core 26 abutting against the bottom of the recess of the attachment portion 28. Therefore, the pen core 26 does not move due to the writing pressure.

The load (first pull-out load) required to pull out the pen core 26 press-fitted into the mounting portion 28 from the mounting portion 28 is, for example, about 1 kgf (9.8 N). This is a low load that can be easily pulled out by squeezing the tip of the pen core 26, but the load is high enough that the pen core 26 does not come out of the mounting portion 28 just by shaking the electronic pen. is there. The load required to pull out the electromagnetic induction stylus 20 from the first holding portion 31 of the attachment 30 (second pull-out load) is a load sufficiently larger than the above-mentioned first pull-out load, for example, 3 kgf (2). 29N). Therefore, when the pen core 26 is pulled out from the attachment portion 28, the electromagnetic induction stylus 20 does not come off from the attachment 30.

Further, as shown in FIG. 1, when the electromagnetic induction stylus 20 is in the forward position, the tip portion of the pen core 26 protrudes forward from the tip opening 13 to the extent that the tip portion of the pen core 26 can be squeezed. .. Therefore, the pen core 26 can be replaced without disassembling the barrel 10. Therefore, when the pen core 26 is worn or the like, the pen core 26 can be easily replaced.

When the capacitive stylus 80 is used as the refill, it is included in the user touching the gripping area of the barrel 10 and the input panel formed to fit the capacitive stylus 80 for detection. It is necessary to establish a capacitance coupling with the electrode. For this purpose, it is preferable that the front shaft cylinder portion 11 of the shaft cylinder 10 is formed of a conductive resin. In this case, for example, the base portion 11A of the front axle tube portion 11 is formed of a conductive resin (for example, a polyacetal resin kneaded with carbon-containing particles), and the grip portion 11B is formed of a conductive elastomer (for example, a silicone rubber kneaded with carbon-containing particles). The outer peripheral surface of the tip of the capacitive stylus 80 in the forward position, that is, the pen tip (which is made of a conductive elastomer), is in contact with the inner peripheral surface of the front opening 13 so as to be capacitively coupled. It can be configured as follows. In this case, the portion of the capacitive stylus 80 behind the pen tip portion can be formed of a non-conductive resin material (a conductive resin material may be used).

Examples of the carbon-containing particles contained in the above-mentioned conductive resin or conductive elastomer include graphite, carbon nanotube-containing particles, carbon black, carbon fibers, and graphite. When considering the use of capacitive stylus 80, the electrical resistivity of the conductive resin (volume resistivity) is preferably set to less 1.0 × 10 ⁵ [Omega] m (which is approximately equal to the human body resistivity) , 1.0 × 10 ² Ωm or less, more preferably. Electrical resistivity of the conductive resin is the reaction tends to deteriorate the input panel in use as capacitive stylus becomes higher than 1.0 × 10 ⁵ Ωm.

It is not necessary that all the capacitance coupling paths from the grip portion 11B to the tip of the capacitance type stylus 80 are formed of the conductive material. For example, if the grip portion 11B is sufficiently thin and is in close contact with the base portion 11A, the grip portion 11B does not have to have conductivity. If the capacitive stylus 80 is conductive over its entire length (for example, if the portion behind the pen tip is also made of a conductive resin), then the spring 44 made of a metallic material and the conductive material Capacitive coupling may be established via an attachment 30 made of (for example, a conductive resin material).

When the front shaft cylinder portion 11 of the shaft cylinder 10 is formed of a metal material, it is practically impossible to use the electromagnetic induction stylus 20 as a refill due to the electromagnetic wave shielding property of the metal material. If it is desired to use both the capacitive stylus 80 and the electromagnetic induction stylus 20 as the refill, it is preferable to form the front axle tube portion 11 with the above-mentioned conductive resin so that the conductivity does not become too high. As a matter of fact, when the front shaft cylinder portion 11 is formed of the conductive resin containing carbon-containing particles, even when the electromagnetic induction stylus 20 is housed in the shaft cylinder 10, electromagnetic induction is performed in the shaft cylinder 10. It has been confirmed that even when the formula stylus 20 is housed, the input operation can be normally performed.

If the capacitive stylus 80 is not considered as a refill option to be used, the front shaft tube portion 11 of the shaft cylinder 10 is made of a non-conductive material, for example, a non-conductive resin (powder, fiber, foil made of a conductor). It is preferable to form the stylus 20 with a piece or the like from the viewpoint of not hindering the operation of the electromagnetic induction stylus 20.

10 Shaft cylinder 13 Tip port 20, 60, 70, 80 Refill 20 Electromagnetic induction stylus 22 Coil 22, 24 Resonant circuit (coil and capacitor)
26 Pen core 28 Mounting part 30 Attachment 31 1st holding part 32 2nd holding part 33A, 33B Spring seat surface 34A1 (front side) meshing part of attachment 34B1 (rear side) meshing part of attachment 40 Feeding mechanism 41 Rotating cam 42A1 Rotating cam (1st) meshing part 42B1 (2nd) meshing part of rotating cam 44 spring 48 knock body

Claims (6)

A barrel with a tip at the front end and
The only refill placed in the barrel,
It is a feeding mechanism that advances and retreats the refill so that the front end of the refill can take a forward position protruding from the front opening and a retracting position retracted to the back of the front opening, and urges the refill rearward. With a feeding mechanism with a spring to
The refill consists of an electromagnetic induction stylus, and when the electromagnetic induction stylus is in the forward position, the front end of the spring is the rear end of a coil constituting a resonance circuit built in the electromagnetic induction stylus, or If there is a magnetic material attached to the coil, it is located at the rear end of the coil, which is located behind the rear end.
The feeding mechanism has a knock body and a rotary cam that rotates by a predetermined angle each time the knock body is operated, and is provided with a rotation transmission mechanism that rotates the refill by transmitting the rotational motion of the rotary cam. Yes,
Electronic pen. An attachment provided between the rotary cam and the refill in the barrel is further provided.
The refill is press-fitted into the front end of the attachment, and the spring urges the attachment and the refill toward the rear end of the axle via a spring bearing surface provided on the outer peripheral portion of the attachment. Provided in
The rotation transmission mechanism has a meshing portion provided on the rotary cam and a meshing portion provided on the attachment, and the meshing portion of the rotary cam and the meshing portion of the attachment are meshed so as to be rotatable and transmittable. The electronic pen according to claim 1. The electromagnetic induction stylus has a pen core and a mounting portion into which the pen core can be detachably inserted, and when the electromagnetic induction stylus is in the forward position, the pen core is inserted. The electronic pen according to claim 1 or 2, which can be grasped and pulled out from the mounting portion. The electronic pen according to claim 2, wherein the pull-out load required to pull out the refill from the attachment is larger than the pull-out load required to pull out the pen core from the attachment portion. Further provided with an attachment provided in the barrel and advanced / retracted by the feeding mechanism.
The refill composed of the electromagnetic induction stylus has a first shape dimension and has a first shape dimension.
A first holding portion capable of holding the rear end portion of the electromagnetic induction stylus is provided at the front end portion of the attachment, and a rear end portion of another refill having a second shape dimension is held at the rear end portion of the attachment. A possible second holding is provided,
The attachment can be arranged upside down in the barrel so that it can be moved forward and backward by the feeding mechanism, whereby the other refill can be placed in place of the electromagnetic induction stylus. The electronic pen according to claim 1, which can be arranged in a stylus. The attachment is provided between the rotary cam and the refill in the barrel.
The rotary cam is provided with a first meshing portion and a second meshing portion, and the rotary cam is provided with a first meshing portion and a second meshing portion.
The front end portion of the attachment is provided with a front meshing portion capable of engaging with the first meshing portion and transmitting the rotational motion of the rotary cam to the attachment.
The electronic pen according to claim 5, wherein the rear end portion of the attachment is provided with a rear meshing portion that meshes with the second meshing portion and can transmit the rotational motion of the rotary cam to the attachment. ..

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