JP2021093040A - Electronic pen - Google Patents

Abstract

To provide an electronic pen with a core body which can be easily attached/detached.SOLUTION: An electronic pen 1 includes: a core body holding part 42 allowing a core body 21 to be inserted through an opening 10a of a pen housing 10 and attached with a tip 21a projecting through the opening 10a; and a pen pressure detection part 5 which detects a force to be applied to the tip 21a of the core body 21. The core body holding part 42 includes a push-latch mechanism part 420 configured to hold the core body 21 so that the tip 21a may project by a predetermined length from the opening 10a of the pen housing 10 when the core body 21 is inserted with a force larger than a force of a range which can be detected by the pen pressure detection part 5, and to project the tip 21a of the core body 21 longer than the predetermined length from the opening 10a of the pen housing 10 when a force larger than the force of the range which can be detected by the pen pressure detection part 5 is applied to the held core body 21.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electronic pen used with a position detection sensor.

There are various types of electronic pens such as an electromagnetic induction type and a capacitance type, but the core body is generally replaceable in consideration of wear of the pen tip portion. In this case, since the tip of the core is in a state of protruding from the opening of the housing of the electronic pen, when the core is replaced, the protruding tip of the core is grasped and pulled. By doing so, pull it out from the electronic pen.

However, the length of the protruding tip of the core is relatively short, and it is troublesome to grip and pull the tip. Further, usually, the electronic pen is provided with a pen pressure detecting unit in order to detect the force (pen pressure) applied to the tip of the core body, and the core body is directly connected to the pen pressure detecting unit. It is fitted and attached to the pen or indirectly via a pressure transmitting member with a predetermined elastic force that does not easily come off during use. Therefore, it is necessary to pull out the core body by pulling the tip portion of the core body with a force capable of releasing this mated state, but the length of the tip portion of the core body protruding from the opening of the housing. There was a problem that it was difficult to pull out because the force was not applied to the core body well because it was short.

Therefore, conventionally, a core pulling tool for pulling out a core body from an electronic pen has been proposed. For example, in Patent Document 1 (Utility Model Registration No. 3005303) and Patent Document 2 (Japanese Patent Laid-Open No. 2019-128752). Is provided with the core removing tool provided in the cap portion of the electronic pen.

Utility Model Registration No. 3005303 Japanese Unexamined Patent Publication No. 2019-128752

However, it is troublesome to prepare the centering tool separately from the electronic pen, and there is also a problem that the centering tool is lost. If a centering tool is provided in a part attached to the electronic pen as in Patent Document 1 and Patent Document 2, it is possible to prevent the situation where the centering tool is lost, but it is attached to the electronic pen. There is a problem that the cost is high because the centering tool is provided for the part.

An object of the present invention is to provide an electronic pen capable of solving the above problems.

To solve the above problems
With the core
A core body holding portion in which the core body is inserted through the opening of the pen housing and the tip portion is mounted so as to project from the opening.
A pen pressure detection unit that detects the force applied to the tip of the core body,
With
When the core body is inserted with a force larger than the force within the range that the pen pressure detection unit can detect, the core body holding portion has a predetermined length of the core body and the tip portion of the tip portion from the opening. It is held in a state where it can be projected by the amount, and when a force larger than the force within the range that can be detected by the pen pressure detecting unit is applied to the holding core body, the tip portion of the core body is applied. Provided is an electronic pen comprising a mechanism portion for making the pen protrude from the opening by the predetermined length or more.

According to the electronic pen having the above-described configuration, when the core body is attached to the electronic pen, the user inserts the core body through the opening of the electronic pen housing, and the force is greater than the force within the range that the pen pressure detection unit can detect in the core body. Apply great force. Then, the core body holding portion holds the core body in a state in which the core body can be projected from the opening of the electronic pen housing by a predetermined length.

Then, when the core body is pulled out for replacement, the user can detect the pen pressure detection unit again on the core body while the core body is held by the core body holding portion. Apply a force greater than the force of the range. Then, the core body holding portion makes the tip portion of the core body protrude from the opening of the electronic pen by a predetermined length or more. Therefore, the user can easily remove the core body by grasping the tip portion of the core body protruding from the opening of the electronic pen for a predetermined length or more.

It is a figure for demonstrating the structural example of the main part of embodiment of the electronic pen by this invention. It is an exploded perspective view for demonstrating the structural example of the main part of the Embodiment of the electronic pen by this invention. It is a figure for demonstrating the operation of the main part of embodiment of the electronic pen by this invention. It is a figure for demonstrating another structural example of the main part of embodiment of the electronic pen by this invention. It is a figure for demonstrating the structural example of the main part of the other embodiment of the electronic pen by this invention.

FIG. 1 is a diagram for explaining a configuration example of an embodiment of an electronic pen according to the present invention. The configuration example of the electronic pen 1 of this embodiment is the case of the electronic pen of the active electrostatic coupling type, and FIG. 1A is a vertical sectional view of the electronic pen 1 of this embodiment on the pen tip side. Further, FIG. 1B is a diagram for explaining a configuration of a main part of the electronic pen 1 of this embodiment. Further, FIG. 2 is an exploded perspective view for explaining the configuration of the electronic pen 1 of this embodiment on the pen tip side.

In the pen housing 10 of the capacitance type electronic pen 1 of this embodiment, the first housing portion 11 on the pen tip side and the second housing portion 12 on the rear end side are tubular coupling members. It is configured by being connected via 13. In this embodiment, the first housing portion 11 and the second housing portion 12 are made of a conductive material, for example, metal, and the tubular coupling member 13 is made of an insulating material, for example, resin.

As shown in FIG. 1A, the first housing portion 11 is formed with a cylindrical portion 11a having a constant outer diameter and a tapered shape so as to gradually taper toward the pen tip side. It has a shape having a tapered portion 11b. The second housing portion 12 has a cylindrical shape having an outer diameter equal to the outer diameter of the cylindrical shape portion 11a of the first housing portion 11.

The tubular coupling member 13 is formed with a ring-shaped flange portion 13F protruding from the outer peripheral side surface in a direction orthogonal to the axial direction at a position in the middle of the outer peripheral surface in the axial direction. Then, the first housing portion 11 is inserted and fitted from the pen tip side of the tubular coupling member 13 which is one side in the axial direction from the ring-shaped collar portion 13F, and the ring-shaped collar portion 13 is fitted. The second housing portion 12 is inserted and fitted from the rear end side (opposite to the pen tip side) in the axial direction from the portion 13F. The first housing portion 11 and the second housing portion 12 made of a conductive material are electrically separated (insulated) from each other without contacting each other due to the presence of the ring-shaped flange portion 13F of the tubular coupling member 13. It is in a state of being.

As shown in FIG. 1A, a front cap 14 made of an insulating material, for example, a resin, is provided on the pen tip side of the first housing portion 11. The front cap 14 is formed with an opening 10a having a diameter slightly larger than the diameter of the core body 21. The core body 21 is inserted into the pen housing 10 of the electronic pen 1 through the opening 10a of the front cap 14.

The core body 21 is made of a conductive material, for example, a conductive metal, and is composed of a rod-shaped body as shown in FIGS. 1A and 1B. As shown in FIG. 1A, the core body 21 made of a conductive material and the first housing portion 11 are electrically separated (insulated) by a front cap 14 which is an insulating material. In the electronic pen 1 of this embodiment, as shown in FIG. 1A, the first housing portion 11 is arranged so as to cover the rear end side of the core body 21 with respect to the tip portion 21a. Consists of peripheral electrodes.

In the hollow portion of the second housing portion 12, as shown in FIG. 1A, a substrate holder 30 on which the printed circuit board 31 is mounted on the substrate mounting base portion 301 and a battery as a power source (not shown). ) Is stored.

The substrate holder 30 is made of an insulating resin, and has a pen pressure detecting portion holding portion 302 on the side opposite to the substrate mounting base portion 301 side in the longitudinal direction which is the axial direction of the electronic pen 1. .. As shown in FIG. 1A, when the substrate holder 30 is housed in the hollow portion of the pen housing 10, the substrate holder 30 and the pen pressure detecting portion holding portion 302 are formed in the longitudinal direction which is the axial direction of the electronic pen 1. , The board mounting base 301 is continuous. The pen pressure detection unit holding unit 302 has a cylindrical shape having a hollow portion inside the hollow portion for accommodating the parts constituting the pen pressure detection unit 5. The substrate mounting base 301 has a boat-like shape on which the printed circuit board 31 is placed and held, and has a shape such that the tubular body is cut in substantially half in the axial direction.

In this example, the pen pressure detection unit 5 uses a capacitance variable capacitor whose capacitance changes according to the pen pressure applied to the core 21, and is a dielectric as shown in FIG. 1 (A). It is composed of 51, a terminal member 52, a conductive member 53, a holding member 54 that holds the conductive member 53, and an elastic member 55. The terminal member 52 and the conductive member 53 are arranged so as to face each other via the dielectric 51, the terminal member 52 constitutes the first electrode of the capacitance variable capacitor, and the conductive member 53 is the first electrode of the capacitance variable capacitor. It constitutes 2 electrodes. The conductive member 53 is elastically displaced by the elastic member 55 in a direction away from the dielectric 51 at all times.

When a writing pressure is applied to the core body 21, the writing pressure is transmitted to the holding member 54, and the conductive member 53 held by the holding member 54 resists the eccentric force of the elastic member 55 and is a dielectric material. It comes into contact with 51, and the contact area changes according to the writing pressure. The capacitance variable capacitor of the pen pressure detection unit 5 exhibits a capacitance corresponding to the contact area between the dielectric 51 and the conductive member 53. Therefore, the pen pressure detection unit 5 can detect the pen pressure as the capacitance of the variable capacitance capacitor.

The substrate holder 30 is housed in the pen housing 10 so that the pen pressure detection unit holding portion 302 is on the core body 21 side. Then, in this embodiment, the pen pressure transmission member 40 is coupled to the pen pressure detection unit holding portion 302, and the force (pen pressure) applied to the core body 21 is transmitted through the pen pressure transmission member 40. It is configured to be transmitted to the pen pressure detection unit 5 of the pressure detection unit holding unit 302.

In this embodiment, as shown in FIG. 1A, a part of the pen pressure detection part holding part 302 of the board holder 30 is fitted with a part of the tubular coupling member 13 to form the board holder 30. The pen pressure detection unit holding unit 302 and the tubular coupling member 13 are coupled to each other. As shown in FIG. 1A, the substrate holder 30 has a shaft in the pen housing 10 when the pen pressure detection unit holding portion 302 is fitted and coupled with the tubular coupling member 13 in the axial direction. The position is regulated so that it does not move in the direction of the heart.

In this embodiment, on the printed circuit board 31, an IC (which constitutes a signal generation circuit that generates a signal to be transmitted from the core body 21 and a control circuit that controls transmission of a signal from the signal generation circuit to the core body 21). Integrate Circuit) and its peripheral circuit parts are provided.

In this embodiment, the pen pressure transmitting member 40 is composed of a pen pressure transmitting portion main body 41 and a core body holding portion 42, as shown in FIGS. 1 (A), 1 (B) and FIG. The pen pressure transmission unit main body 41 includes a fitting portion 411 that is fitted into the fitting recess 54a of the holding member 54 of the pen pressure detection unit 5, and a storage recess 412 that houses the core body holding portion 42. As shown in FIGS. 1B and 2, engagement through holes 412a and 412b are formed on the peripheral side surface of the storage recess 412.

As shown in FIGS. 1B and 2, the core body holding portion 42 includes a concave hole 42c into which the side opposite to the tip portion 21a of the core body 21 is inserted, and the pen pressure transmitting portion main body 41 is engaged. It includes protrusions 42a and 42b that engage the through holes 412a and 412b.

Then, in this embodiment, an elastic member for absorbing an impact load, in this example, a coil spring 43, is provided in the storage recess 412 of the pen pressure transmission unit main body 41, and the storage recess 412 is provided. The core body holding portion 42 is inserted into the core body holding portion 42 in the axial direction, and the protruding portions 42a and 42b engage with the engaging through holes 412a and 412b of the pen pressure transmitting portion main body 41, whereby the core body holding portion 42 is formed. It is locked in the storage recess 412 of the pen pressure transmission unit main body 41.

When the coil spring 43 for absorbing an impact load does not expand or contract with a force (pen pressure) within the range in which the pen pressure detection unit 5 can detect the pen pressure, and when the core body 21 is held by the core body holding portion 42. It does not expand or contract even within the range of the force applied to, for example, the force applied when the electronic pen 1 is accidentally dropped and held on the tip 21a of the core 21 and the core 21 is held on the core holding portion 42. It is provided with a configuration that expands and contracts when an impact load equal to or greater than the force in the range of is applied to absorb the impact load.

The core body holding portion 42 includes a holding state control mechanism portion for the core body 21. When the core body 21 is inserted with a force larger than the force within the range in which the pen pressure detection unit 5 can detect the pen pressure, the holding state control mechanism unit inserts the core body 21 and the tip portion 21a thereof into the pen housing. It is held in a state where it can be projected from the opening 10a of 10 by a predetermined length suitable for the usage state of the electronic pen 1, and the pen pressure detection unit is further applied to the holding core body 21. When a force larger than the force in the range in which the writing pressure can be detected by 5 is applied, the tip portion 21a of the core body 21 is brought into a state of protruding from the opening 10a of the pen housing 10 by the predetermined length or more. Work for.

In this embodiment, the holding state control mechanism unit is configured to have a push latch function, and the force on the holding core body 21 is further equal to the force in the range in which the pen pressure detecting unit 5 can detect the pen pressure. When a large force is applied, the holding of the core body 21 is released, the core body 21 is projected from the opening 10a of the pen housing 10, and the tip portion 21a of the core body 21 is extended by a predetermined length or more. It is in a state of protruding from the opening 10a of the body 10. That is, in this embodiment, as shown in FIG. 1B, the push latch mechanism portion 420 is provided in the concave hole 42c of the core body holding portion 42. A configuration example of the push latch mechanism portion 420 and its operation will be described later.

In this embodiment, the pressure transmitting portion main body 41 is made of a conductive material, for example, SUS (Steel Special Use Stainless), and the core body holding portion 42 is mixed with, for example, a conductive material, for example, a conductive metal powder. It is made of stainless steel. Then, as described above, the force applied to the core body 21 by fitting the fitting portion 411 of the pen pressure transmitting portion main body 41 into the fitting recess 54a of the holding member 54 of the pen pressure detecting portion 5 ( The pen pressure) is transmitted to the pen pressure detection unit 5.

Then, as shown in FIGS. 1A and 2, a conductive metal or the like is formed between the pressure transmitting portion main body 41 of the pen pressure transmitting member 40 and the pen pressure detecting portion holding portion 302 of the substrate holder 30. A coil spring 22 is provided as an example of an elastic member made of a conductive material, and the coil spring 22 is configured to always urge the substrate holder 30 toward the core body 21 side. The coil spring 22, together with the conductor terminal member 23 described later, constitutes an electrical connection member for transmitting a signal from the signal transmission circuit of the IC arranged on the printed circuit board 31 to the core body 21. is there.

That is, as shown in FIG. 1A, a conductive coil spring is formed on a rod-shaped portion 413 having a fitting portion 411 of a pen pressure transmission portion main body 41 accommodating a core body holding portion 42 made of a conductive material at its tip. After the 22 is mounted, the rod-shaped portion 413 of the pen pressure transmission unit main body 41 is fitted to the holding member 54 of the pen pressure detection unit 5 in the pen pressure detection unit holding unit 302 of the substrate holder 30.

In this case, in this embodiment, as shown in FIGS. 1A and 2, the rod-shaped portion 413 of the pen pressure transmitting portion main body 41 is inserted into the pen pressure detecting portion holding portion 302 of the substrate holder 30. A conductor terminal member 23 made of a conductive material, for example, SUS, is mounted so as to cover the opening 302a side.

As shown in FIGS. 2A and 2B, the conductor terminal member 23 covers the opening 302a side of the pen pressure detecting portion holding portion 302 of the substrate holder 30 and has a rod shape of the pen pressure transmitting portion main body 41. It includes a contact plate portion 231 having a through hole 231a through which the portion 413 is inserted, and mounting plate portions 232 and 233 that are orthogonal to the contact plate portion 231 and face each other.

Further, the conductor terminal member 23 is provided with an extension portion 234 that straddles the portion of the pen pressure detection portion holding portion 302 of the substrate holder 30 and extends to the portion of the substrate mounting base portion 301. In this example, a terminal portion 234a to be soldered, for example, is formed on the back surface of the printed circuit board 31 at the tip portion of the stretched portion 234.

Then, in a state where the conductor terminal member 23 is mounted on the pen pressure detection portion holding portion 302 of the substrate holder 30, as shown in FIG. 1A, the terminal portion at the tip of the extension portion 234 of the conductor terminal member 2 The 234a comes into contact with the conductor on the back surface side of the printed circuit board 31 mounted on the board mounting base 301 of the board holder 30, and is soldered, for example. As a result, the conductor terminal member 23 and the signal generation circuit formed on the surface of the printed circuit board 31 are electrically connected.

Since the conductor terminal member 23 is electrically connected to the conductive pen pressure transmission member 40 via the conductive coil spring 22, it is held by the core body holding portion 42 of the pen pressure transmission member 40. The core body 21 is electrically connected to the signal transmission circuit of the printed circuit board 31, and the signal from the signal transmission circuit is supplied to the core body 21.

In this embodiment, the IC formed on the printed circuit board 31 and the first housing portion 11 constituting the peripheral electrodes are the second housing portion 12 as shown in FIG. 1 (B). Are electrically connected through a connection terminal conductor 16 made of, for example, a conductor metal, which is arranged in an insulated state. The peripheral electrode composed of the first housing portion 11 receives, for example, a signal from the position detection sensor by electrostatic coupling, controls the transmission timing of the signal transmitted from the core body 21, and controls the transmission timing of the electronic pen 1. It is used for sending a signal for tilt detection to the position detection sensor side.

[Explanation of push latch mechanism as an example of holding state control mechanism of core holding portion 42]
The push latch mechanism portion 420 of this example has a configuration equivalent to that disclosed in publicly known documents (see, for example, JP-A-2003-173844, JP-A-2005-294203, etc.), and in this example, it has a structure equivalent to that disclosed. As shown in FIG. 1 (B), the core body holding portion 42 is provided along the axial direction at a predetermined angular position in the circumferential direction in the concave hole 42c.

The push latch mechanism portion 420 of this example includes a slider 421, a return spring 422 composed of, for example, a coil spring, a lock spring member 423 for locking and holding the core body 21, and a cam mechanism portion 424. It is configured.

The slider 421 is elastically biased by the return spring 422 toward the opening side of the concave hole 42c of the core body holding portion 42 into which the core body 21 is always inserted. The slider 421 includes a step portion 421a that engages with an end portion of the core body 21 that is opposite to the tip end portion 21a side. When the core body 21 is inserted into the concave hole 42c and pushed toward the back of the concave hole 42c by a predetermined force, the end portion of the core body 21 engages with the step portion 421a and the return spring 422 It moves in the axial direction against the elastic force.

The lock spring member 423 is provided on the slider 421 and is a member for holding the core body 21 inserted into the concave hole 42c of the core body holding portion 42. As shown in FIGS. 1B and 2, in this embodiment, a concave groove 21b that engages with the lock spring member 423 is formed at a predetermined position on the side opposite to the tip portion 21a side of the core body 21. Has been done. When the core body 21 is pushed into the concave hole 42c and the slider 421 moves, the lock spring member 423 engages with the concave groove 21b of the core body 21, and at that position, the core body 21 moves the core body holding portion 42. It is held in the concave hole 42c of.

The position of forming the concave groove 21b of the core body 21 is such that when the concave groove 21b engages with the lock spring member 423 and the core body 21 is held in the concave hole 42c of the core body holding portion 42, the electronic pen 1 The protruding length of the tip portion 21a protruding from the opening 10a of the pen housing 10 is set to an appropriate length when the electronic pen 1 is used.

The cam mechanism portion 424 is provided in the slider 421, and the detailed configuration is not shown, but the held core body 21 is pushed into the concave hole 42c again against the elastic force of the return spring 422. When the force is received, the holding state of the core body 21 by the lock spring member 423 and the concave groove 21b is released, and the core body 21 is pushed back to the outside of the concave hole 42c by the elastic force of the return spring 422. It has a function to make it.

In this case, when the elastic force of the return spring 422 is larger than the force (pen pressure) that can be detected by the pen pressure detection unit 5, the return spring 422 elastically contracts to make the slider 421 a concave hole 42c. Something that can be moved to the inner part is used. Therefore, when the core body 21 is held by the core body holding portion 42, the return spring 422 contracts as long as the force applied to the core body 21 is within the range of the force that can be detected by the pen pressure detecting unit 5. Instead, the writing pressure applied to the core body 21 is directly transmitted to the writing pressure detecting unit 5 via the writing pressure transmitting member 40.

Then, when the core body 21 is held by the core body holding portion 42, if a force larger than the magnitude of the force that can be detected by the pen pressure detecting unit 5 is applied to the core body 21, the return spring 422 contracts. The slider 421 moves toward the inner part of the concave hole 42c, the engagement between the lock spring member 423 and the concave groove 21b is released, and the slider 421 is moved by the function of the cam mechanism portion 424 and the elastic force of the return spring 422. It is returned to the opening side of the concave hole 42c. As a result, the core body holding portion 42 operates so as to push the core body 21 back out of the concave hole 42c and make it pop out.

[Explanation of the holding control operation of the core body 21 in the core body holding portion 42 of the pen pressure transmission member 40]
The operation of attaching and detaching the core body 21 in the electronic pen 1 configured as described above will be described. Further, in this embodiment, when the core body 21 is attached to the core body holding portion 42, a protective operation when an impact load is applied to the core body 21 due to a drop of the electronic pen 1 or the like is also described. To do.

The range of the force (pen pressure) that can be detected by the pen pressure detection unit 5 in the electronic pen 1 of this embodiment, the elastic force of the return spring 422 of the core body holding unit 42, and the elastic force of the coil spring 43 for shock absorption. Although the relationship has been described above, it will be further described by showing a numerical value of a specific force range.

That is, as described above, the return spring 422 of the core body holding portion 42 does not contract with a force within a range that can be detected by the pen pressure detecting unit 5, and is larger than a force within a detectable range of the pen pressure detecting unit 5. It is configured so that it can be contracted when a force is applied, and the core body 21 can be attached and detached, that is, the core body 21 can be replaced.

Further, the shock absorbing coil spring 43 does not contract with a force within a range that can be detected by the pen pressure detecting unit 5. Therefore, the force (pen pressure) in the range that can be detected by the pen pressure detection unit 5 is directly transmitted to the pen pressure detection unit 5 via the pen pressure transmission member 40. Further, the shock absorbing coil spring 43 does not contract even in the range of the force applied when the core body 21 is attached and detached by the core body holding portion 42. Therefore, the core body 21 can be attached and detached regardless of the shock absorbing coil spring 43.

The shock absorbing coil spring 43 has a force larger than the force in the range that can be detected by the pen pressure detecting unit 5, and a force larger than the force applied to the core body 21 when the core body 21 is attached and detached by the core body holding unit 42. For example, it is configured to be able to contract when an impact load is applied.

In this example, the pen pressure detection unit 5 can detect a force (pen pressure) in the range of 0 to 500 grams. Then, in the core body holding portion 42, a force in the range of 500 grams to 2000 grams is applied to the core body 21, so that the core body 21 can be attached and detached. Further, when a force of 2000 grams or more is applied, the shock absorbing coil spring 43 contracts to absorb the shock and protect the pen pressure detecting unit 5.

Next, the attachment / detachment of the core body 21 and the protective operation of the pen pressure detecting unit 5 against an impact load will be described. FIG. 3 is a diagram for explaining an operation for attaching and detaching the core body 21 and a protective operation against an impact load in the electronic pen 1 of this embodiment, and is a diagram for explaining a substrate holder 30 and a pen pressure detecting unit 5 in the electronic pen 1. It is a figure which shows typically the pen pressure transmission member 40.

As shown in FIG. 3A, the core body 21 is inserted through the opening 10a of the pen housing 10 of the electronic pen 1, and the tip end portion of the core body 21 is pressed against the surface of the desk, for example, 500 grams. When a force in the range of ~ 2000 grams is applied to the core body 21, the return spring 422 contracts, the push latch mechanism portion 420 operates, and the core body 21 holds the core body as shown in FIG. 3 (B). It is held by the portion 42, and the tip portion 21a of the core body 21 is in a used state in which it projects by a predetermined length.

In this holding state, as shown in FIG. 3C, the tip portion 21a of the core body 21 is pressed against the surface of the desk again, and a force in the range of 500 g to 2000 g is applied to the core body 21. When this happens, the return spring 422 contracts, the push latch mechanism portion 420 operates, and the core body 21 is released from being held by the core body holding portion 42 as shown in FIG. 3 (D). The core body 21 is set so as to protrude greatly from the opening 10a of the pen housing 10 over a length larger than the predetermined length in the used state of B) and (C). Therefore, the user can grasp the tip portion 21a of the core body 21 that protrudes longer than the used state, and easily remove the core body 21 from the electronic pen 1 and replace it.

Further, when the electronic pen 1 is dropped while the core body 21 is held by the core body holding portion 42 as shown in FIG. 3 (B), a large force IM as shown in FIG. 3 (E) is applied. When the core body 21 is applied, the shock absorbing coil spring 43 contracts as shown in FIG. 3 (E) so that the impact load force IM is not absorbed and transmitted to the pen pressure detecting unit 5. Will be done. Therefore, the pen pressure detecting unit 5 is protected from the impact load.

As described above, in the electronic pen 1 of the above-described embodiment, since the core body holding portion 42 includes the push latch mechanism portion 420 as the holding state control mechanism portion for the core body 21, the core body 21 can be attached and detached. , Can be done easily. In particular, it is very convenient because a core removing tool is not required for removing the core body 21.

Further, in the electronic pen 1 of the above-described embodiment, the pen pressure transmitting member 40 is provided with a coil spring 43 for shock absorption between the core body holding portion 42 and the pen pressure transmitting portion main body 41, so that the pen 1 is electronic. Even when an impact load is applied to the core body 21 when the pen 1 is dropped or the like, the pen pressure detecting unit 5 can be protected.

[Modified example of the above-described embodiment]
In the above-described embodiment, the push latch mechanism portion 420 is used as the holding state control mechanism portion of the core body holding portion 42 of the pen pressure transmission member 40, but the holding state control mechanism portion of the core body holding portion 42 is , Not limited to this.

FIG. 4 shows another configuration example of the holding state control mechanism unit of the core body holding unit 42, and this example is an example in which the knock mechanism of a so-called knock type ballpoint pen is applied as the holding state control mechanism unit. In FIG. 4, the same reference numerals as those of the pen pressure transmitting member 40 of the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The pen pressure transmission member 40A of the example of FIG. 4 has a configuration in which the core body holding portion 42A is housed in the storage recess 412 of the pen pressure transmission section main body 41 via a coil spring 43 for shock absorption. It is the same as the embodiment. In the core body holding portion 42A of the pen pressure transmission member 40A of the example of FIG. 4, a knock mechanism portion 44 is provided instead of the push latch mechanism portion of the above example. For the sake of explanation, in FIG. 4, the knock mechanism portion 44 is shown without being broken.

As shown in FIG. 4, in the knock mechanism portion 44 of the core body holding portion 42A of this example, a columnar rotary cam 441 is constantly recessed by a return spring 442 in the concave hole 42Ac of the core body holding portion 42A. It is stored in a state of being elastically biased toward the opening side of the hole 42Ac.

Further, a pressing member 443 that engages with the rotary cam 441 in the axial direction is housed in the concave hole 42Ac of the core body holding portion 42A. When the pressing member 443 is pressed against the elastic force of the return spring 422, the rotary cam 441 is configured to rotate about its axial center line. Since this configuration is known as a configuration of a knock mechanism of a knock-type ballpoint pen, detailed description thereof will be omitted here.

The rotary cam 441 and the pressing member 443 are arranged so as to engage in the axial direction by the elastic force of the return spring 442. A fitting hole 443a is formed on the pen tip side of the pressing member 443, and an end portion of the core body 21 opposite to the tip end portion 21a is fitted into the fitting hole 443a. There is.

In the core body holding portion 42A of this example, a plurality of ridges 444 in the axial direction are formed on the inner wall surface of the concave hole 42Ac in the circumferential direction. In the concave groove between the adjacent ones of the plurality of ridges 444, a protrusion that engages with the protrusion provided on the pressing member 443 is formed so that the pressing member 443 does not fall out from the core body holding portion 42A. Has been made. Then, in the rotary cam 441, a plurality of ridges 441a (shown in black in FIG. 4) that engage with the ridges 444 of the inner wall surface of the concave hole 42Aa are formed in the rotary cam 441 having a columnar shape. It is formed on the peripheral side surface of.

In the case of the example of FIG. 4, the core body 21 serves as a knock rod of the knock mechanism unit 44. The elastic force of the return spring 442 is larger than the force (pen pressure) in the range that can be detected by the pen pressure detection unit 5, similar to the return spring 422 of the push latch mechanism unit 420 of the above-described embodiment. It is configured so that it can contract when it receives it.

In the example of FIG. 4, in the state before the use state in which the core body 21 is not pushed in, as shown in FIG. 4 (B), the ridge 441a of the rotary cam 441 is a recess of the core body holding portion 42A. It is in a state of being inserted into a concave groove between adjacent ridges 444 formed on the inner wall surface of the hole 42Ac, and due to the elastic force of the return spring 442, the pressing member 443 is recessed in the core body holding portion 42A. In the hole 42Ac, it is the position closest to the pen tip side. At this time, although the core body 21 is held in the fitting hole 443a of the pressing member 443, most of the tip portion 21a is in a state of protruding from the opening 10a of the pen housing 10 of the electronic pen 1. That is, the tip portion 21a side of the core body 21 protrudes longer than the usage state shown in FIG. 4 (A).

In this state, the tip 21a side of the core body 21 is pressed against the surface of the desk, and the force (pen pressure) within the range that can be detected by the pen pressure detection unit 5 is applied to the tip 21a side of the core body 21. When a larger force is applied, in the knock mechanism portion 44 of the core body holding portion 42, the pressing member 443 and the rotary cam 441 resist the elastic force of the return spring 442 and enter the concave hole 42Ac of the core body holding portion 42A. It can be moved to the back. Then, the engagement with the concave groove between the ridges 444 in the concave hole 42Ac of the rotary cam 441 is released, the rotary cam 441 rotates, and as shown in FIG. 4 (A), the inside of the concave hole 42Ac. It is locked in a state of being engaged with the ridge 444 of. At this time, since the core body 21 is held by the pressing member 443, as shown in FIG. 4A, the tip portion 21a of the pen housing is provided with a pen housing by an appropriate length in the state of use of the electronic pen 1. It is in a state of protruding from the opening 10a of the body 10.

In the used state shown in FIG. 4 (A), the pressing member 443 is not locked in the concave hole 42Ac. Therefore, as it is, the tip portion 21a side of the core body 21 is shown in FIG. 4 (B). It becomes a state that can be in the state shown. However, in this embodiment, as shown in FIGS. 4A and 4B, the core body 21 is on the surface of the front cap 14 on the opening side of the pen housing 10 of the electronic pen 1 facing the core body 21. An elastic member 45 that elastically supports the tip portion 21a of the core body 21 is provided, and the tip portion 21a of the core body 21 is configured to maintain the state shown in FIG. 4 (A). The elastic member 45 may be any material as long as it can lock the tip portion 21a of the core body 21, such as elastic rubber or urethane resin.

In order to take out the core body 21 for replacement from the usage state shown in FIG. 4 (A), the tip portion 21a side of the core body 21 is pressed against the surface of the desk or the like, and the core body 21 is again. A force larger than the force (pen pressure) in the range that can be detected by the pen pressure detection unit 5 is applied to the tip portion 21a side. Then, the pressing member 443 and the rotary cam 441 are moved to the depth inside the concave hole 42Ac against the elastic force of the return spring 442, and the rotary cam 441 is engaged with the ridge 444 in the concave hole 42Ac. When released, the rotary cam 441 rotates, and as shown in FIG. 4 (B), the ridge 441a of the rotary cam 441 is located between adjacent ridges 444 formed on the inner wall surface of the concave hole 42Ac. It becomes possible to enter the concave groove.

Therefore, the rotary cam 441 moves to the pen tip side due to the elastic force of the return spring 442, and as shown in FIG. 4B, the pressing member 443 is returned to the position closest to the pen tip side in the concave hole 42Ac. To do so. As a result, as shown in FIG. 4B, most of the tip portion 21a of the core body 21 is in a state of protruding from the opening 10a of the pen housing 10 of the electronic pen 1. Therefore, the user can easily remove the core body 21 from the electronic pen 1 by pinching the tip portion 21a of the protruding core body 21 and pulling out the core body 21 from the fitting hole 443a of the pressing member 443.

Also in the example of FIG. 4, when the impact load is applied to the core body 21 by the impact absorbing coil spring 43, the impact load is absorbed and the writing pressure is detected in the same manner as in the above-described embodiment. The part 5 can be protected.

[Other Embodiments]
The above embodiment is a case where the present invention is applied to an active electrostatic coupling type electronic pen, but the present invention can be similarly applied to an electromagnetic induction type electronic pen.

FIG. 5 is a diagram for explaining a configuration of a main part when the present invention is applied to an electromagnetic induction type electronic pen. That is, when applied to an electromagnetic induction type electronic pen, as shown in FIG. 5, the core body 21B has a through hole 62a formed in a magnetic material core around which a coil 61 is wound, for example, a ferrite core 62. Is inserted. In the electromagnetic induction type electronic pen, the core body 21B does not have to have conductivity, and is made of, for example, a hard resin.

Then, in the example of FIG. 5, in the axial direction of the space inside the housing of the electronic pen, the core body holding portion 42 using the push latch mechanism portion 420 described above is provided on the side opposite to the pen tip side of the ferrite core 62. A pen pressure transmitting member 40 housed in the pen pressure transmitting portion main body 41 is provided so that the end portion of the core body 21 through which the through hole 62a of the ferrite core 62 is inserted is held by the core body holding portion 42.

With this configuration, even in the example of the electromagnetic induction type electronic pen of FIG. 5, the same action and effect as those of the above-described embodiment can be obtained. Needless to say, the pen pressure transmission member 40A of the example of FIG. 4 can be used instead of the pen pressure transmission member 40.

[Other Embodiments or Modifications]
In the above-described embodiment of the active electrostatic coupling type electronic pen, a peripheral electrode is provided, but it goes without saying that the peripheral electrode is not essential.

Further, in the above-described embodiment, the core body holding portion 42 is provided on the pen pressure transmitting member, but the pen pressure transmitting member may be omitted and the core body holding portion may be provided on the pen pressure detecting portion. .. That is, the pen pressure detection unit may be configured to include a core body holding unit including a holding state control mechanism unit. For example, the fitting recess 54a of the holding member 54 of the pen pressure detecting section 5 in the above-described embodiment is provided with a holding state control mechanism such as the push latch mechanism and the knocking mechanism of the knock-type ballpoint pen, and the fitting recess 54a is provided. The holding state of the core body 21 may be controlled by the holding state control mechanism unit by inserting the end portion of the core body 21 into 54a.

The pen pressure detection unit is not limited to the one having the above-mentioned configuration, and for example, the capacitance variable capacitor is composed of a semiconductor chip composed of a MEMS (Micro Electro Mechanical Systems) element (for example, Patent Document (Japanese Patent Laid-Open No. 2013). -1613007)) may be used.

Further, the holding state control mechanism portion provided in the core body holding portion is not limited to the one using the push latch mechanism portion and the knock mechanism portion described above, and various other configurations are possible.

1 ... Electronic pen, 5 ... Pen pressure detector, 10 ... Housing, 21 ... Core body, 30 ... Board holder, 31 ... Printed circuit board, 40, 40A ... Pen pressure transmission member, 41 ... Pen pressure transmission unit body, 42 ... Core body holding part, 43 ... Coil spring for shock absorption, 44 ... Knock mechanism part, 420 ... Push latch mechanism part

Claims (11)

With the core
A core body holding portion in which the core body is inserted through the opening of the pen housing and the tip portion is mounted so as to project from the opening.
A pen pressure detection unit that detects the force applied to the tip of the core body,
With
When the core body is inserted with a force larger than the force within the range that the pen pressure detection unit can detect, the core body holding portion has a predetermined length of the core body and the tip portion of the tip portion from the opening. It is held in a state where it can be projected by the amount, and when a force larger than the force within the range that can be detected by the pen pressure detecting unit is applied to the holding core body, the tip portion of the core body is applied. An electronic pen comprising a holding state control mechanism unit that allows the pen to protrude from the opening for a predetermined length or longer. The electronic pen according to claim 1, wherein the core holding portion is included in the pen pressure detecting portion. A pen pressure transmission member for transmitting the force applied to the core body to the pen pressure detection unit is provided.
The electronic pen according to claim 1, wherein the core body holding portion is provided on the pen pressure transmitting member. When the core body is inserted with a force larger than the force within the range that can be detected by the pen pressure detection unit, the holding state control mechanism unit of the core body holding portion causes the core body to be inserted by the tip portion. When the core body is held in a state where it can be projected from the opening by a predetermined length and a force larger than the force within the detectable range of the pen pressure detecting unit is applied to the holding core body. The electronic pen according to claim 1, wherein the holding of the core body is released so that the tip end portion of the core body is projected from the opening by the predetermined length or more. When the core body is inserted with a force larger than the force within the range that can be detected by the pen pressure detection unit, the holding state control mechanism unit of the core body holding portion causes the core body to be inserted by the tip portion. When the core body is held in a state where it can be projected from the opening by a predetermined length and a force larger than the force within the detectable range of the pen pressure detecting unit is applied to the holding core body. The electronic pen according to claim 1, wherein the tip portion of the core body is brought out from the opening by a predetermined length or more while maintaining the holding of the core body. The pen pressure transmission member is composed of the core body holding portion and the pen pressure transmission portion main body arranged side by side along the axial direction of the core body.
The electronic pen according to claim 3, wherein an elastic member is provided between the core body holding portion and the pen pressure transmitting portion main body. In the elastic member, a force larger than a force larger than a force in a range that can be detected by the pen pressure detecting unit on which the holding state control mechanism unit of the core body holding portion works can be applied to the tip end side of the core body. The electronic pen according to claim 6, wherein when the pen is elastically displaced, it operates so as to absorb the larger force. The core body engages with the engaging portion of the holding state control mechanism portion of the core body holding portion when the core body is inserted with a force larger than a force within a range that can be detected by the pen pressure detecting portion. The electronic pen according to claim 1, further comprising an engaging portion for holding the tip portion in a state in which the tip portion can protrude from the opening by a predetermined length. The pen pressure detecting unit detects the force applied to the core body as a change in the capacitance of a capacitor having a configuration in which the first electrode and the second electrode face each other with a dielectric sandwiched between them. The electronic pen according to claim 1. The electronic pen according to claim 1, wherein the core body is made of a conductive material and transmits a signal through the core body. The first aspect of the electromagnetic induction method, wherein the core body is inserted through a through hole formed in a magnetic body core around which a coil is wound and held by the core body holding portion. Electronic pen.

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