JP2024015944A - Electronic pen and electronic pen body part - Google Patents

Abstract

To prevent components that are not desired to come into contact with an inner wall surface of a pen housing on a pen tip side of an electronic pen body part from coming into contact with the inner wall surface of the pen housing.SOLUTION: An electronic pen comprises: a cylindrical pen housing; and an electronic pen body part which has a cylindrical body part housing capable of being stored in a hollow part of the pen housing and in which a core body is attached to one end in an axial direction of the body part housing and the other end in the axial direction of the body part housing is locked in the pen housing. At a predetermined position in the axial direction of an outer peripheral part of the body part housing of the electronic pen body part, a projecting part is formed which projects in a direction intersecting the axial direction of the body part housing. On an inner wall surface of the hollow part of the pen housing, a stopper part is formed which prevents the electronic pen body part from moving toward a pen tip side in the pen housing by engaging with the projecting part of the body part housing in a state where a tip end side of the core body is exposed to the outside through an opening of the pen housing.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electronic pen whose electronic pen body is housed in a pen housing, and to the electronic pen body.

In recent years, electronic pens are becoming more and more cartridge-type due to the diversification (emphasis on design) of overall shapes (outer casings). To achieve this, the main body of the electronic pen, which is equipped with the main functions of the electronic pen, such as a position indication function for the position detection sensor and a writing pressure detection function, is housed in the pen housing as an electronic pen cartridge. Electronic pens have been proposed (see Patent Document 1 (WO2016/158418), etc.).

This type of electronic pen can be constructed by simply storing and incorporating the electronic pen main body into the hollow part of the cylindrical pen housing, so it is possible to construct the electronic pen main body by simply storing and incorporating the electronic pen main body into the hollow part of the cylindrical pen housing. In addition to being easy to replace, the electronic pen can be configured as a knock type, making it extremely convenient.

WO2016/158418

In the electronic pen described above, the rear end of the electronic pen main body, which is opposite to the pen tip side in the axial direction, is fitted into a fitting part provided inside the pen housing, so that the electronic pen body is inserted into the pen housing. The configuration is set to be maintained. For this reason, the pen tip side of the electronic pen body is in a state where it can move freely, and the parts on the pen tip side of the electronic pen body that you do not want to come into contact with the inner wall surface of the pen housing are inside the pen housing. There is a risk of contact with the wall.

Further, a core is attached to the nib side of the electronic pen body, and when the electronic pen is used, the tip of the attached core protrudes from the opening on the nib side of the pen housing. Ru. In that case, in the electronic pen as described above, the length of the part of the electronic pen body with the core attached that protrudes from the opening on the nib side of the pen housing is the rear end of the electronic pen body. This varies depending on the amount of fitting into the fitting part inside the pen housing. Due to this variation as well, there is a risk that a component on the nib side of the electronic pen body that is not desired to come into contact with the inner wall surface of the pen housing may come into contact with the inner wall surface of the pen housing.

Furthermore, in the case of knock-type electronic pens, due to the structure of the conventional knock cam mechanism using a rotating cam, when the pen tip is extended by the knock operation and when the pen tip is returned to the state where it is stored in the pen housing, The pen tip side of the electronic pen main body temporarily protrudes larger than the amount of the pen tip that protrudes from the nib side opening of the pen housing when the electronic pen is used. Because of the movement, there is a risk that parts on the nib side of the electronic pen main body that should not come into contact with the inner wall surface of the pen housing may come into contact with the inner wall surface of the pen housing.

An example of a component that is not desired to come into contact with the inner wall surface of the pen housing on the nib side of the electronic pen main body is a coil wound around a magnetic core in the case of an electromagnetic induction electronic pen. In other words, in the case of an electromagnetic induction type electronic pen, the coil wound around the magnetic core is placed near the pen tip, but when the coil comes into contact with the inner wall surface of the pen housing, the contact portion This places a load on the coil, and the magnetic flux for coupling with the position detection sensor by electromagnetic induction becomes unstable, which may adversely affect the interaction characteristics between the electronic pen and the position detection sensor.

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

In order to solve the above issues,
A cylindrical pen housing with an opening on the pen tip side and a hollow part inside;
The pen housing has a cylindrical main body housing that can be stored in the hollow portion, and a core body is attached to one end side in the axial direction of the main body housing, and the core body is attached to one end side in the axial direction of the main body housing. an electronic pen main body portion whose other end side in the direction is locked within the pen housing;
Equipped with
A projecting portion that extends in a direction intersecting the axial direction of the main body housing is formed at a predetermined position in the axial direction of the outer peripheral portion of the main body housing of the electronic pen body,
The inner wall surface of the hollow portion of the pen housing is engaged with the protruding portion of the main body housing in a state where the tip side of the core body is exposed to the outside from the opening of the pen housing. The present invention provides an electronic pen, characterized in that a stopper portion is formed within the pen housing to prevent movement of the main body housing toward the pen tip.

In the electronic pen configured as described above, the protruding portion provided on the outer circumference of the main body housing of the electronic pen main body engages with the stopper portion provided on the inner wall surface of the pen housing, and the electronic pen main body movement toward the pen tip side is prevented. Therefore, according to the electronic pen having the above-mentioned configuration, the parts on the nib side of the electronic pen main body that should not come into contact with the inner wall surface of the pen housing are in contact with the inner wall surface on the pen nib side of the pen housing of the electronic pen. It is prevented from doing so.

FIG. 1 is a diagram for explaining an embodiment of an electronic pen and an embodiment of an electronic pen main body according to the present invention. FIG. 2 is a diagram for explaining an example of the configuration of the pen tip side of an embodiment of an electronic pen and an embodiment of an electronic pen main body. FIG. 2 is a perspective view for explaining a configuration example of a pen tip side of an embodiment of an electronic pen main body. FIG. 6 is a diagram for explaining the movement of the pen tip side during a knock operation of a conventional knock-type electronic pen as a comparative example of the embodiment of the electronic pen according to the present invention. FIG. 3 is a diagram for explaining the movement of the pen tip side during a knock operation of the embodiment of the electronic pen according to the present invention. FIG. 7 is a cross-sectional view for explaining another embodiment of the electronic pen according to the present invention. FIG. 7 is a diagram for explaining another embodiment of the electronic pen main body according to the present invention.

Hereinafter, embodiments of the electronic pen according to the present invention will be described with reference to the drawings, together with embodiments of the electronic pen main body.

FIG. 1 is a diagram showing a configuration example of an embodiment of an electronic pen according to the present invention, and this example is for an electromagnetic induction type electronic pen. The electronic pen 1 of this embodiment has a cartridge-type configuration, and the main functions of the electronic pen, such as the position instruction function for the position detection sensor and the writing pressure detection function, are carried out in the electronic pen main body 3 as the electronic pen cartridge. The pen tip side of the electronic pen main body part 3 has a knock-type structure in which the pen tip side of the electronic pen main body part 3 is inserted and removed from the opening 2b side at one end in the longitudinal direction of the pen housing 2. In this embodiment, the electronic pen main body 3 is configured to be detachable from the pen housing 2.

FIG. 1(A) shows a state in which the entire electronic pen main body 3 is housed in the hollow part 2a of the pen housing 2, and FIG. A state in which the pen tip side of the portion 3 is extended from the opening 2b of the pen housing 2 is shown. Note that in FIGS. 1A and 1B, the pen housing 2 of the electronic pen 1 is made of transparent synthetic resin, and the inside thereof is shown as being transparent. FIG. 1C is a diagram showing an example of the configuration of the electronic pen main body 3 of this embodiment.

As shown in FIGS. 1A and 1B, the pen housing 2 of the electronic pen 1 of this embodiment has a cylindrical shape, in this example, a cylindrical shape. The pen housing 2 has a hollow portion 2a inside, and one end in the axial direction thereof is a gradually tapered pen tip, and an opening 2b is provided at the tip. In the electronic pen 1 of this embodiment, as shown in FIGS. 1A and 1B, the electronic pen main body 3 is housed in the hollow part 2a of the cylindrical pen housing 2, and The knock cam mechanism section 10 provided at the other end in the axial direction of the housing 2 (hereinafter referred to as the rear end side) allows the pen tip side of the electronic pen main body 3 to be connected to the opening 2b at one end in the longitudinal direction of the pen housing 2. It is designed to be inserted and removed from the side.

In this example, as shown in FIGS. 1A and 1B, the pen housing 2 includes a pen tip side housing part 21 on one end side in the axial direction, and a rear end on the other end side in the axial direction. The side housing section 22 is configured to be coupled at a coupling section 23 . In this example, the coupling portion 23 has a structure in which the pen tip side housing portion 21 is screwed into the rear end side housing portion 22 .

Note that the connection between the pen tip side housing section 21 and the rear end side housing section 22 is not through screwing as in this example; A ring-shaped convex part is formed on one side of the pen tip side housing part 22 and a ring-shaped concave part is formed on the other side, and the other is press-fitted into one of the pen tip side housing part 21 and the rear end side housing part 22. The structure may be such that the ring-shaped convex portion is fitted into the ring-shaped concave portion to be coupled.

In this example, the knock cam mechanism section 10 is provided within the rear end side housing section 22 of the pen housing 2, as shown in FIGS. 1(A) and (B). The knock cam mechanism section 10 has the same configuration as the knock cam function section of a well-known commercially available knock type ballpoint pen. That is, the knock cam mechanism section 10 has a well-known configuration in which a cam body 11, a knock rod 12, and a rotor 13 are combined, as shown in FIGS. 1(A) and 1(B). The cam main body 11 is formed on the inner wall surface of the rear end side housing portion 22. The knock rod 12 has an end 12a located on the rear end side of the pen housing 2, which is an opening on the side opposite to the pen tip side of the rear end side housing part 22, so that the knock rod 12 can receive a knock operation by the user. It is adapted to protrude from the opening 2c.

In FIG. 1, the coil spring 5 changes from the extended state in which the pen tip side of the electronic pen body 3 is protruded as shown in FIG. 1(B) to the non- extended state shown in FIG. This is a return spring (hereinafter referred to as return spring 5) for returning to the state.

The rotor 13 has a fitting recess into which a fitting protrusion 3P (see broken lines in FIGS. 1(A) and 1(B) and FIG. 1(C)) provided on the rear end side of the electronic pen body 3 is fitted. 13J is provided.

In this embodiment, the rear end portion of the electronic pen body portion 3 is fitted into the fitting recess 13J of the electronic pen body portion holding portion 13a of the rotor 13 of the knock cam mechanism portion 10 provided in the rear end side housing portion 22. The fitting protrusion 3P is fitted to lock the electronic pen main body 3 to the rear end housing 22. Then, the electronic pen main body 3 is inserted into the pen tip side housing section 21 from the rear end side of the pen tip side housing section 21, and the pen tip side housing section 3 is inserted into the pen tip side housing section 21 from the rear end side of the pen tip side housing section 21. By combining the portions 21, the electronic pen 1 is configured. Note that the electronic pen main body 3 is detachable from the electronic pen main body holding portion 13a of the rotor 13 of the knock cam mechanism 10.

As shown in FIG. 1C, the electronic pen main body 3 of this embodiment includes a core 30, a signal transmission member 40, a main body housing 50, and in this example, a main body housing 50. It consists of an elastic displacement part 60 provided between the mating protrusion 3P. The main body housing 50 includes a holder part 51 that holds a pen pressure detection part 71 and a circuit board 72 on which an electronic circuit is arranged, and a pen pressure detection part 71 and a circuit board 72 held by the holder part 51. and a protective cover part 52 that has the function of housing and protecting the.

In this example, the core body 30 is made of a relatively hard and elastic resin material, such as POM (Polyoxymethylene), and in this example, the core body 30 has a tip having a larger diameter than the shaft center on the pen tip side of the rod-shaped shaft center. A portion 30a is formed.

The signal transmission member 40 includes a coil 41 that constitutes a resonant circuit for transmitting and receiving signals to and from the position detection device using electromagnetic induction, and a magnetic core around which the coil 41 is wound, in this example a ferrite core 42. It is configured. A through hole 42a is formed in the ferrite core 42 in the axial direction.

The diameter of the through hole 42a of this ferrite core 42 is made larger than the diameter of the axial center part of the core body 30, and the axial center part of the core body 30 is inserted through the through hole 42a to form a pen pressure detection part. 71 is fitted. In this case, the tip 30a of the core 30 is made to protrude beyond the ferrite core 42 as a pen tip, and the end 30b on the rear end side of the shaft center of the core 30 is configured to detect pen pressure. It is fitted into the section 71. As a result, the pressure (pen pressure) applied to the tip 30 a of the core body 30 is applied to the pen pressure detection section 71 . The core body 30 is removably attached to the pen pressure detection section 71.

The pen pressure detection unit 71 uses, for example, a mechanism that changes the capacitance of a variable capacitance capacitor according to the applied pressure (pen pressure) (see, for example, patent document (Japanese Patent Application Laid-Open No. 2011-186803)). configured. Note that the pen pressure detection unit 71 may use a capacitance variable capacitor configured with a semiconductor chip made of a MEMS (Micro Electro Mechanical Systems) element (see, for example, Patent Document (Japanese Patent Laid-Open No. 2013-161307)). Note that the configuration of the pen pressure detection section 71 is not limited to that in this example.

The circuit board 72 is equipped with electronic components such as a capacitor that forms a resonant circuit together with the coil 41, and in this example, a conductive pattern for connecting the pen pressure detection section 71 configured as a variable capacitance capacitor to the resonant circuit. is formed.

The holder part 51 of the main body part housing 50 is made of, for example, a resin material, and is fitted with the ferrite core 42 of the signal transmission member 40, and has a cylindrical part (not shown) that holds the pen pressure detection part 71. In addition, a circuit board mounting table (not shown) for mounting and holding the circuit board 72 is provided.

The protective cover section 52 of the main body housing 50 is made of a pipe-shaped member made of a hard material, in this example, a pipe-shaped member made of metal. A circuit portion protection member that protects the electrical circuit component portion of the board 72 is configured.

That is, the main body housing 50 is in such a state that a part of the cylindrical part that holds the pen pressure detection part 71 of the holder part 51 and the circuit board mounting table part are housed in the hollow part of the protective cover part 52. The holder part 51 and the protective cover part 52 are connected in the axial direction. In this case, as shown in FIG. 1C, the diameter of the cylindrical portion of the holder portion 51 and the diameter of the pipe-shaped member constituting the protective cover portion 52 are set to be the same diameter R0.

As shown in FIG. 1C, in this example, the elastic displacement section 60 includes a rod-shaped member 61 made of resin, for example, which is thinner than the inner diameter of the protective cover section 52 of the main body casing 50, and a coil spring 62 that can be expanded and contracted. In this example, it is provided on the rear end side of the protective cover section 52 of the main body housing 50.

In this case, one end 61a of the rod-shaped member 61 in the axial direction has a diameter slightly larger than that of the intermediate portion 61m of the rod-shaped member 61, into which the coil spring 62 is loosely fitted, and the protective cover portion 52 The inner diameter of the opening 52a on the rear end side is slightly smaller than the diameter of one end 61a of the rod-shaped member 61 in the axial direction. The rod-shaped member 61 has one end 61a located on the rear end opening 52a side in the hollow part of the protective cover part 52 with respect to the protective cover part 52, and the intermediate part 61m and the other end in the axial direction. The protective cover portion 52 is attached so that the end portion 61b is exposed to the outside.

Due to the relationship between one end 61a of the rod-shaped member 61 and the inner diameter of the opening 52a on the rear end side of the protective cover section 52, the rod-shaped member 61 cannot be protected when attached to the rear end side of the protective cover section 52. It is designed not to come off from the opening 52a on the rear end side of the cover part 52. However, since the diameter of the rod-shaped member 61 is smaller than the inner diameter of the protective cover part 52, one end 61a side of the rod-shaped member 61 is located inside the hollow part of the protective cover part 52 on the pen tip side. It is in a movable state.

The other end 61b of the rod-like member 61 in the axial direction is configured to have a larger diameter than the middle portion 61m of the rod-like member 61 into which the coil spring 62 is loosely fitted. The diameter of the portion 61b is selected to be equal to the diameter R0 of the main body housing 50. In this example, a fitting protrusion 3P on the rear end side of the electronic pen body 3 is formed in the center of the circular end surface of the other end 61b of the rod-shaped member 61.

The diameter of the coil spring 62 is selected to be larger than the diameter of the intermediate portion 61m of the rod-shaped member 61 and smaller than the diameter R0 of the protective cover portion 52 and the other end portion 61b of the rod-shaped member 61. Therefore, the coil spring 62 is held at the intermediate portion 61m between the rear end of the protective cover 52 of the main body housing 50 and the other end 61b of the rod-shaped member 61. In this holding state, the coil spring 62 elastically attaches the rear end side of the protective cover section 52 of the main body housing 50 and the other end section 61b of the rod-shaped member 61 due to its elastic return force. It is said to be in a strong state.

In this embodiment, the elastic displacement portion 60 is attached to the rear end side of the main body housing 50 as described above, thereby forming the electronic pen main body 3 as shown in FIG. 1(C). When a load of a predetermined value or more is applied to the electronic pen main body 3 to cause the length in the axial direction to contract against the elastic displacement force of the elastic displacement section 60. , the coil spring 62 of the elastic displacement section 60 elastically contracts, and the one end 61a side of the rod-shaped member 61 is displaced within the protective cover section 52 toward the pen tip side. When such a load disappears, the coil spring 62 returns elastically to expand, and the length of the electronic pen main body 3 in the axial direction returns to the original state shown in FIG. 1(C).

In this case, the elastic characteristics of the coil spring 62 are insensitive to a load in the range of writing pressure applied to the tip 30a of the core 30 when the electronic pen 1 is used. In other words, the elastic characteristics of the coil spring 62 are insensitive to loads within the range of pen pressure values detected by the pen pressure detection section 71. The coil spring 62 is activated when a load is applied to the tip end 30a of the core body 30 due to a knocking operation by the user, or when a load is applied to the tip end 30a of the core body 30 in the range of writing pressure, or when the electronic pen 1 is used. It has elastic properties such that it expands and contracts as described above when an impact load or the like that is larger than the load in the writing pressure range is applied to 1.

Note that the elastic displacement section 60 is removable from the protective cover section 52 of the electronic pen main body section 3.

The elastic characteristics of the return spring 5 in the knock cam mechanism described above are similar to those used in a general knock-type ballpoint pen, and the elastic force is smaller than that of the coil spring 62 of the elastic displacement portion 60.

In the electronic pen main body 3 of this embodiment, as shown in FIGS. 1(A), (B), and (C), one end of the main body housing 50 in the axial direction At a predetermined position between the main body housing 50 and the other end side, a projecting portion 80 is provided that projects from the outer circumferential side of the main body housing 50 in a direction intersecting the axial direction, in this example, a direction perpendicular to the axial direction. The protruding portion 80 has an end face in a direction intersecting the axial direction, in this example, a direction perpendicular to the axial direction, as an end face on the pen tip side of the protruding portion. In this embodiment, the projecting portion 80 is provided on the holder portion 51 on the pen tip side of the main body housing 50. The projecting portion 80 may be configured integrally with the outer casing of the holder portion 51, or may be configured separately from the holder portion 51.

In this case, the projecting portion 80 may be formed to project in a direction perpendicular to the axial direction over the entire outer circumference of the holder portion 51, but in this embodiment, as shown in FIG. As shown, the holder portion 51 is shaped such that portions 180 degrees apart from each other protrude in a direction perpendicular to the axial direction by the width of the diameter of the holder portion 51. The tip of the overhanging portion 80 in the axial direction has an arcuate shape so as to follow the inner wall surface of the pen housing 2 . This structure minimizes the contact area between the axial tip of the overhanging part 80 and the inner wall surface of the pen housing 2, so that the pen can be easily moved during a knock operation or when subjected to an impact load. This is to facilitate the movement of the electronic pen main body 3 in the axial direction within the housing 2.

Furthermore, in this embodiment, the projecting portions 80 are formed to project from angular ranges that differ by 180 degrees from each other on the outer periphery of the main body housing 50. The wire connecting the capacitor can pass through a portion other than the protrusion 80, and will not rub against the inner wall surface of the pen housing 2. Also in this case, problems with the knock-type electronic pen 1 can be reduced.

In this embodiment, the inner wall surface of the pen housing 2, in this embodiment the inner wall surface of the pen tip side housing part 21, has an electronic pen body part as shown in FIGS. 1(A) and (B). The pen housing 2 of the electronic pen body 3 engages with the end surface of the pen tip side of the protrusion 80 provided on the main body housing 50 of the electronic pen body 3, in this example, in the direction orthogonal to the axial direction. In this example, a stepped portion 2d is formed as an example of a stopper portion for preventing the pen from moving toward the pen tip.

In the electronic pen 1, when writing on the input surface of the position detection sensor, the length (specified protrusion length) in the axial direction that the pen tip side of the electronic pen body 3 should protrude to the outside from the opening 2b of the pen housing 2 is determined. , is predetermined in consideration of ease of input operations by the user.

In this embodiment, the projecting portion 80 provided on the main body housing 50 of the electronic pen body 3 and the stepped portion 2d formed on the inner wall surface of the pen housing 2 are It is formed so as to engage when the protrusion length of the pen tip side from the opening 2b of the pen housing 2 reaches the above specified protrusion length Lp.

The relationship between the formation position of the overhanging part 80 provided on the main body part housing 50 of the electronic pen main body part 3 and the formation position of the step part 2d formed on the inner wall surface of the pen housing 2 in this embodiment is as follows. , will be further explained with reference to FIG.

FIG. 3(A) is a sectional view of the pen tip side of the pen tip side housing part 21 of the pen housing 2, and FIG. 3(B) is a diagram showing the pen tip side of the electronic pen body part 3. .

As shown in FIG. 3(B), the electronic pen main body 3 is made of a ferrite core 42 around which a coil 41 is wound around a holder 51 on the pen tip side of a main body housing 50 having an outer diameter of R0. Further, the core body 30 is inserted through the through hole 42a of the ferrite core 42 and fitted into the pen pressure detection section 71 disposed in the holder section 51.

In this example, as shown in FIG. 3(B), the outer diameter R1 of the ferrite core 42 is smaller than the outer diameter R0 of the main body housing 50. The outer diameter R2 of the portion around which the coil 41 is wound around the ferrite core 42 is equal to or smaller than the outer diameter R0 of the main body housing 50. That is, they are configured to have a relationship of R1<R2≦R0.

As shown in FIG. 3A, the diameter R3 of the pen tip side opening 2b of the pen housing 2 (pen tip side housing part 21) is larger than the outer diameter R1 of the ferrite core 42 of the electronic pen body part 3. As shown in FIG. 1 ((B)), when the electronic pen 1 is used, in this example, not only the core body 30 but also a part of the ferrite core 42 are exposed to the outside from the opening 2b. configured to be exposed to.

As shown in FIG. 3(B), in the axial direction, the length from the tip of the tip 30a of the core body 30 to a part of the pen tip side of the ferrite core 42 is the specified protrusion length Lp described above. It is determined that Further, as shown in FIG. 3(B), in the axial direction, from the tip of the tip part 30a of the core body 30 to the pen tip side end surface of the overhanging part 80 of the holder part 51 of the electronic pen body part 3 The length is Lz.

On the other hand, as shown in FIG. 3A, the inner diameter R4 of the hollow part of the pen nib that communicates with the opening 2b of the pen nib side housing part 21 of the pen housing 2 is the outer diameter R0 of the electronic pen main body part 3. The signal transmitting member 40 is configured so as not to come into contact with the inner wall surface of the pen tip side housing section 21 in the hollow portion having an inner diameter R4. In this example, as shown in FIG. 3(A), the hollow part of the pen tip side housing part 21 has a diameter that gradually decreases from the part with the inner diameter R4 to the opening 2b with the diameter R3. It has a taper. Therefore, if the coil 41 of the electronic pen main body 3 comes to be located on the tapered portion, there is a risk that the coil 41 will come into contact with the inner wall surface of the tapered portion.

Therefore, in this example, as shown in FIGS. 3(A) and 3(B), from a position on the rear end side of the tip of the core 30 of the electronic pen body 3 by a specified protrusion length Lp in the axial direction, the coil The length from the tip of the opening 2b of the pen tip side housing part 21 of the pen housing 2 to the pen tip side end of the winding portion of 41 through the tapered part is The length up to the end is equal to the length L2.

Then, as shown in FIGS. 3A and 3B, from the tip of the opening 2b of the pen tip side housing part 21 of the pen housing 2, a length L1 (=Lz-Lp) equal to Lz-Lp is drawn. The inner diameter of the hollow part of the pen tip side housing part 21 on the rear end side from the position is set to be a diameter R5 larger than the inner diameter R4 and the outer diameter R0. As a result, a stepped portion 2d is formed at a position with a length L1 (=Lz-Lp) equal to Lz-Lp from the tip of the opening 2b of the pen tip side housing portion 21 of the pen housing 2.

Therefore, as shown in FIG. 3(A), in the pen housing 2 of the electronic pen 1 of this embodiment, the length of the portion having the diameter R4 on the pen tip side is the length L3 (=L1-L2). becomes. When the pen tip side of the electronic pen main body 3 protrudes by the specified protrusion length Lp, the electronic pen main body 3 shown in FIG. The coil 41 is now located. Therefore, the coil 41 does not come into contact with the inner wall of the hollow portion 2a of the pen housing 2. Therefore, the coil 41 is not subjected to unnecessary load due to contact, and can be coupled to the position detection sensor with stable magnetic flux by the signal transmission member 40.

The diameter of the circular arc portion at the tip in the protruding direction of the overhanging portion 80 formed on the holder portion 51 of the main body housing 50 of the electronic pen body 3 is the same as that of the pen tip side housing portion 21 of the pen housing 2 The diameter R6 is larger than the inner diameter R4 of the hollow portion on the pen tip side than the stepped portion 2d, and is approximately equal to or slightly smaller than the inner diameter R5 of the pen tip side housing portion 21 of the pen housing 2. ing. In other words, they are configured to have the relationship R4<R6≦R5.

With the above configuration, as shown in FIG. By engaging the portion 80, the electronic pen main body portion 3 is in a state where it is prevented from moving toward the pen tip within the hollow portion 2a of the pen housing 2. In this state, a part of the core 30 and ferrite core 42 on the nib side of the electronic pen body 3 protrudes outward from the opening 2b of the pen housing 2 by the specified protrusion length Lp. Can be done.

Therefore, the electronic pen 1 always maintains a state in which the pen tip side protrudes outward from the opening 2b by the specified protrusion length Lp, and the pen tip side of the electronic pen main body 3 The coil 41, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2, can be prevented from coming into contact with the inner wall surface of the pen housing 2.

Moreover, in this embodiment, the diameter of the arc-shaped portion at the tip in the protruding direction of the overhanging portion 80 provided on the electronic pen body 3 is the inner diameter R5 of the pen tip side housing portion 21 of the pen housing 2. Since the diameter R6 is approximately equal to, or slightly smaller than, the displacement of the electronic pen main body 3 in the direction orthogonal to the axial direction is also suppressed. Therefore, this also prevents the coil 41, which is an example of a component that should not come into contact with the inner wall surface of the pen housing 2 on the nib side of the electronic pen body 3, from coming into contact with the inner wall surface of the pen housing 2. You can do it like this.

In the electronic pen 1 of this embodiment, the overhanging part 80 of the electronic pen main body part 3 engages with the stepped part 2d of the inner wall surface of the pen tip side housing part 21 of the pen housing 2. The pen tip side of the electronic pen body 3 is configured so that it does not protrude beyond the specified protrusion length Lp to the outside from the opening 2b of the pen housing 2, so even when the knock operation is performed, the pen tip side does not protrude beyond the specified protrusion length Lp. In this respect, the coil 41, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2 on the pen tip side of the electronic pen body 3, comes into contact with the inner wall surface of the pen housing 2. You can prevent this from happening.

The movement of the pen tip side of the electronic pen 1 of this embodiment during a knock operation will be explained in comparison with the movement of the pen tip side of a conventional knock type electronic pen 1PR.

FIG. 4 is a diagram for explaining the movement of the pen tip side of the electronic pen main body 3PR during a knock operation of the conventional knock-type electronic pen 1PR. FIG. 4A shows a non-extended state in which the pen tip side of the electronic pen body 3PR is housed in the pen housing 2PR. FIG. 4(B) shows that from the state of FIG. 4(A), the user of the electronic pen 1PR presses down the knock bar 12PR of the knock cam mechanism part 10PR to push the pen tip side of the electronic pen body part 3PR. , which shows a state in which the pen housing 2PR protrudes from the opening by a specified protrusion length Lp.

In the conventional knock-type electronic pen 1PR, in the state shown in FIG. 4(B), the operation of drawing out the pen tip of the electronic pen main body 3PR is not completed, and when the push-down operation of the knock rod 12PR is stopped, the knock cam is closed. Due to the elastic displacement force of the return spring (not shown in FIG. 4) of the mechanism portion 10PR, the electronic pen body portion 3PR returns to the non-extended state shown in FIG. 4(A).

From the state shown in FIG. 4(B), the user further pushes in the knock bar 12PR to define the pen tip of the electronic pen body 3PR from the opening of the pen housing 2PR, as shown in FIG. 4(C). The protrusion length Lp or more is made to protrude. Then, the rotor of the knock cam mechanism 10PR rotates, and as shown in FIG. 4(D), the pen tip of the electronic pen body 3PR protrudes from the opening of the pen housing 2A by a specified protrusion length Lp. , the knock cam mechanism 10PR is locked, and the feeding operation is completed.

Then, from the usage state of the electronic pen 1PR in which the pen tip is extended by the specified protrusion length Lp shown in FIG. 4(D), the knock bar 12PR is further pushed and the electronic pen 1PR is moved again as shown in FIG. 4(E). When the pen tip portion of the main body portion 3PR is made to protrude beyond the specified protrusion length Lp from the opening of the pen housing 2PR, the rotor of the knock cam mechanism portion 10PR rotates, the locking state of feeding is released, and the knock cam mechanism Due to the elastic displacement force of the return spring (not shown in FIG. 4) of the portion 10PR, the electronic pen body portion 3PR returns to the position shown in FIG. 4(A), as shown in FIG. 4(F). The pen tip side of the pen returns to the non-extended state stored in the pen housing 2PR.

As described above, in the case of the conventional knock-type electronic pen 1PR, as shown in FIGS. It is necessary to move the electronic pen main body 3PR toward the opening side of the pen housing 2PR so that the tip protrudes. There is a possibility that the coil of the signal transmitting member, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2, may come into contact with the inner wall surface of the pen housing 2.

Next, the movement of the pen tip side of the electronic pen main body 3 during the knock operation of the knock-type electronic pen 1 of this embodiment will be described with reference to FIG. FIG. 5A shows a non-extended state in which the pen tip side of the electronic pen main body 3 is housed in the pen housing 2. In this state, the stepped portion 2d of the pen housing 2 and the protruding portion 80 of the electronic pen body 3 are separated from each other and are not engaged with each other.

Then, from the state shown in FIG. 5(A), the user of the electronic pen 1 presses down the knock bar 12 of the knock cam mechanism 10 against the elastic force of the return spring 5, resulting in the state shown in FIG. 5(B). As shown, when the pen tip side of the electronic pen body 3 is made to protrude from the opening of the pen housing 2 by the specified protrusion length Lp, the tension between the stepped part 2d of the pen housing 2 and the electronic pen body 3 increases. The protruding portion 80 is engaged with the pen tip side of the writing input cartridge 5, and the pen tip side of the writing input cartridge 5 is in a state where it no longer moves in the direction of protruding from the opening 2a within the pen tip side housing portion 21.

However, in the state shown in FIG. 5(B), the operation of drawing out the pen tip of the electronic pen main body 3 is not completed, and when the pressing operation of the knock bar 12 is stopped, the return spring 5 of the knock cam mechanism 10 Due to the elastic displacement force (not shown in FIG. 5), the electronic pen main body 3 returns to the non-extended state shown in FIG. 5(A).

From the state shown in FIG. 5(B), the user applies a pressure (load) that resists the elastic displacement force of the return spring 5, but is smaller than the elastic displacement force of the coil spring 62 of the elastic displacement section 60. ), when the knock operation part is pushed into the pen tip side, the rotor part 13 cannot be moved to the pen tip side.

Then, from the state shown in FIG. 5(B), when the user pushes in the knock rod 12 by applying a large pressure (load) that resists the elastic displacement force of the coil spring 62 of the elastic displacement section 60, the pen housing 2 Since the portion 2d and the protruding portion 80 of the electronic pen body 3 are engaged, the protrusion length of the pen tip side of the electronic pen body 3 remains the specified protrusion length Lp, but as shown in FIG. ), the coil spring 62 of the elastic displacement section 60 of the electronic pen main body 3 contracts, and the elastic displacement section 60 contracts in the axial direction. In response to this, the rotor 13 of the knock cam mechanism 10 moves in the axial direction and rotates, causing the pen tip of the electronic pen body 3 to protrude from the opening of the pen housing 2 by a specified protrusion length Lp. In this state, the knock cam mechanism section 10 is locked. Then, as shown in FIG. 5(D), the coil spring 62 of the elastic displacement section 60 of the electronic pen main body 3 which has contracted returns to its original state, and the contracted elastic displacement section 54 returns to its original length state. Then, the electronic pen 1 enters a use state in which the pen tip portion is extended by the specified protrusion length Lp, and the pen tip portion is completely extended by the knocking operation.

As is clear from the above explanation, the length of the stroke in the axial direction during the knock operation of the knock cam mechanism when the pen tip side of the electronic pen main body 3 protrudes from the opening of the pen housing 2 is The length in the axial direction that the pen tip side of the electronic pen main body 3 moves during the knocking operation becomes smaller. That is, the pen tip side of the electronic pen main body 3 moves by the same amount as the pushing amount of the knock rod 12 until the protruding part 80 collides with the stepped part 2d of the pen housing 2, but it moves no further than that. do not. When pressure (load) resisting the coil spring 62 of the elastic displacement section 60 of the electronic pen main body 3 is applied to the knock rod 12, the elastic displacement section 60 of the electronic pen main body 3 moves along the length in the axial direction. change. This displacement of the length of the elastic displacement portion 54 of the electronic pen main body portion 3 becomes a part of the necessary stroke during the knock operation.

In the usage state shown in FIG. 5(D), when the user applies writing pressure by bringing the tip of the core 30 of the nib of the electronic pen 1 into contact with the input surface of the position detection sensor, the elastic displacement portion 60 Since the writing pressure is insensitive to the writing pressure, the writing pressure detection unit 71 accurately detects the writing pressure applied to the tip of the core body 30.

When the pen tip of the electronic pen main body 3 is extended from the opening of the pen housing 2, if an impact load is applied to the pen tip side, for example, by accidentally dropping the electronic pen 1, etc. The impact load is absorbed by the elastic displacement of the elastic displacement portion 60, and damage to the electronic pen 1 can be avoided. That is, the elastic displacement section 60 functions as a so-called shock absorber. The same applies when an impact load is applied to the knock rod 12 side of the knock cam mechanism section 10.

Next, when the knock rod 12 is further pushed in from the usage state in which the pen tip is extended by the specified protrusion length Lp shown in FIG. 80, the protrusion length of the pen tip side of the electronic pen body 3 remains the specified protrusion length Lp, but as shown in FIG. The elastic displacement portion 60 of the knock cam mechanism 10 contracts in the axial direction, the rotor 13 of the knock cam mechanism 10 rotates, the locking state of the extension is released, and the return spring 5 of the knock cam mechanism 10 (see FIG. As shown in FIG. 5(F), the pen tip side of the electronic pen main body 3 shown in FIG. It returns to the non-extended state stored in 2.

As explained above, in the electronic pen 1 of this embodiment, in the knocking operation of the electronic pen 1, the stepped portion 2d of the pen housing 2 and the overhanging portion 80 of the electronic pen body 3 are engaged. , the pen tip side of the electronic pen main body 3 maintains a state in which it does not protrude beyond the specified protrusion length Lp, and the knock cam mechanism 10 causes the pen tip of the electronic pen main body 3 to move due to the elastic displacement of the elastic displacement section 60. Allows for extending and returning operations.

Therefore, even during the knock operation, the coil 41, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2 on the nib side of the electronic pen body 3, comes into contact with the inner wall surface of the pen housing 2. It is possible to prevent this from happening. As described above, the electronic pen main body 3 that is extended by the knocking operation is prevented from being displaced in the direction perpendicular to the axial direction due to the presence of the overhanging part 80. The coil 41, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2 on the pen tip side of the main body 3, can be prevented from coming into contact with the inner wall surface of the pen housing 2.

[Other embodiments]
Note that although the electronic pen of the above-described embodiment has a knock-type configuration, the electronic pen according to the present invention is not limited to the knock-type configuration. FIG. 6 is a diagram showing a configuration example of an electronic pen 1A having a non-knock type configuration.

In the electronic pen 1A of this embodiment, as shown in FIG. 6, the electronic pen main body 3 of the above-described embodiment is used as is. The electronic pen main body 3 is housed in the hollow part 2Aa of the cylindrical pen housing 2A made of, for example, resin, and the rear end side of the pen housing 2A is made of, for example, resin. By closing with the lid portion 20A, the electronic pen main body portion 3 is configured to be unable to move in the axial direction.

In this case, the pen housing 2A of the electronic pen 1A of this embodiment has an electronic pen on one end side in the axial direction, similar to the pen tip side housing part 21 of the pen housing 2 of the electronic pen 1 described above. The main body part 3 has an opening 2Ab for allowing the tip end 30a of the core 30 on the nib side and a part of the nib side of the ferrite core 42 around which the coil 41 is wound to protrude to the outside. Further, as shown in FIG. 6, the inner wall surface of the pen housing 2A has a stepped portion 2Ad formed at a position a length L1 from the tip of the opening 2Ab on the pen tip side in the axial direction of the pen housing 2A. As shown in FIG. 2, the inner diameter on the pen tip side is selected to be R4, and the inner diameter on the rear end side is selected to be R5.

Therefore, when the electronic pen body part 3 is inserted into the hollow part 2Aa from the opening on the rear end side of the pen housing 2A, as shown in FIG. In the state where it is protruded by Lp, the protruding portion 80 abuts against the stepped portion 2Ad of the pen housing 2A, and is in a state where it does not move any further toward the pen tip side in the axial direction.

In this state, by coupling the lid part 20A to the rear end side of the pen housing 2A and closing the rear end side opening, the electronic pen main body part 3 can be placed inside the hollow part 2Aa of the pen housing 2A. It is stored in the hollow part 2Aa of the pen housing 2A without moving in the axial direction. In this case, the lid 20A includes a fitting recess 20Aa that fits into the fitting protrusion 3P at the rear end of the electronic pen main body 3.

In the electronic pen 1A of this embodiment, the elastic displacement portion 60 of the electronic pen body 3 is slightly contracted to elastically displace the length of the electronic pen body 3 in the axial direction. The portion 20A is coupled to the pen housing 2A. As a result, the lid 20A moves toward the pen housing 2A in such a state that the protrusion 80 of the electronic pen body 3 always elastically urges the step 2Ad on the inner wall surface of the pen housing 2A toward the pen tip. is combined with

Although not shown, the coupling portion 23A between the pen housing 2A and the lid portion 20A is screwed together. Note that the joint portion 23A between the pen housing 2A and the lid portion 20A is not a screw-in connection, but a ring-shaped convex portion is formed on one side of the pen housing 2A and the lid portion 20A, and a ring-shaped convex portion is formed on the other side. A configuration may also be adopted in which a concave portion is formed, one of the pen housing 2A and the lid portion 20A is press-fitted into the other, and the ring-shaped concave portion is fitted into the convex portion of the ring to be coupled.

Also in the electronic pen 1A of this embodiment, the overhanging portion 80 of the electronic pen body 3 engages with the stepped portion 2d of the pen housing 2, so that the pen tip side of the electronic pen body 3 is always The state of protruding by the specified protrusion length Lp is maintained. As a result, in the electronic pen 1A of this embodiment as well, the coil 41, which is an example of a component that should not come into contact with the inner wall surface of the pen housing 2A on the pen tip side of the electronic pen body 3, is inside the pen housing 2A. It can be prevented from coming into contact with the wall surface.

Also, in the electronic pen 1A of this embodiment, the diameter of the arcuate portion at the tip in the protruding direction of the overhanging portion 80 provided on the electronic pen body 3 is approximately equal to the inner diameter R5 of the pen housing 2A. Alternatively, since the diameter R6 is slightly smaller, the electronic pen main body 3 is also suppressed from being displaced in the direction orthogonal to the axial direction. Therefore, this also prevents the coil 41, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2 on the nib side of the electronic pen body 3, from coming into contact with the inner wall surface of the pen housing 2A. You can do it like this.

Also, in the usage state of the electronic pen 1A of this example, similarly to the electronic pen 1 of the above-described embodiment, the user brings the tip of the core body 30 of the pen tip into contact with the input surface of the position detection sensor and presses the writing pressure. When applied, the elastic displacement section 60 is insensitive to the pen pressure, so the pen pressure detection section 71 accurately detects the pen pressure applied to the tip of the core body 30. .

When the electronic pen 1A is accidentally dropped and an impact load is applied to the pen tip side, the impact load is absorbed by the elastic displacement of the elastic displacement section 60, resulting in damage to the electronic pen 1A. can be avoided.

Note that in the electronic pen 1A of the embodiment shown in FIG. 6, the electronic pen main body 3 having the elastic displacement part 60 is used as is; You can. In that case, by configuring the lid portion 20A with a member having elasticity, for example, an elastic resin member such as hard rubber, the projecting portion 80 of the electronic pen body 3 can be formed at a step on the inner wall surface of the pen housing 2A. The lid part 20A is attached to the pen housing so that the electronic pen main body part 3 is always elastically biased toward the pen tip side in the hollow part 2Aa of the pen housing 2A in the state where it is engaged with the part 2Ad. 2A.

[Other embodiments or modifications]
In the above-described embodiment, the stopper part on the inner wall surface of the pen housing 2 that engages with the overhanging part 80 and prevents the electronic pen body part 3 from moving toward the pen tip side is attached to the pen housing 2. Although the stepped portion 2d is formed by changing the diameter of the hollow portion of 2, the structure is not limited to such a stepped portion 2d. Any material may be used as long as it can prevent the pen from moving toward the pen tip. For example, the stopper portion may be configured as a protrusion that engages with all or part of the protruding portion 80 on the inner wall surface of the pen housing 2 to prevent the electronic pen body portion 3 from moving toward the pen tip. good.

In the above-described embodiment, the projecting portion 80 provided on the electronic pen main body 3 projects in a direction perpendicular to the axial direction of the main body housing 50, but is not limited to the direction perpendicular to the axis. , in a direction intersecting the axial direction, and which engages with the stopper portion formed by the step portions 2d, 2Ad, etc., may be used. Considering that case, when determining the formation position of the stopper parts such as the step parts 2d and 2Ad and the formation position of the overhang part 80, it is necessary to Make your selection based on location.

Further, in the above embodiment, the elastic displacement section 60 is provided at the rear end side of the main body housing 50 of the electronic pen main body 3, but it may be provided in the middle of the main body housing 50. For example, the protective cover portion 52 of the main body housing 50 may be divided into two parts, and the protective cover portion 52 may be provided in the middle thereof.

Further, in the above-described embodiment, the projecting portions 80 are formed to project from angular ranges that differ by 180 degrees from each other on the outer periphery of the main body housing 50; It may be formed so as to protrude in three directions from different corner ranges, or it may be formed over the entire circumference of the main body housing 50. Alternatively, one projecting portion may be formed over a predetermined corner range of the outer periphery of the main body housing 50 of the electronic pen main body 3.

FIG. 7 shows an example in which a projecting portion is formed over the entire circumference of the main body casing 50 of the electronic pen main body 3. In this example, the shape of the holder portion 51 of the main body casing 50 is devised. This is an example in which a projecting portion is formed by

FIG. 7A is an enlarged view of the side of the holder portion 51A of the main body housing 50A in this example, which is connected to the signal transmitting member 52 made of the coil 41 wound around the ferrite core 42. Further, FIG. 7(B) is an enlarged perspective view of the signal transmitting member 40 including the coil 41 wound around the ferrite core 42 and the holder portion 51A of the main body housing 50A.

In the example of FIG. 7, the holder portion 51A of the main body housing 50A has an outer diameter equal to the outer diameter R0 of the protective cover portion 52 at the position where it is connected to the end portion of the protective cover portion 52 on the pen tip side. The outer diameter of the holder portion 51A gradually increases from the outer diameter R0 at the joining position with the protective cover portion 52 toward the pen tip, and the maximum outer diameter is equal to the inner diameter R5 of the hollow portion of the pen housing 2. It has an overhanging portion 80A having a diameter R6 that is approximately equal or slightly smaller. The overhanging portion 80A constitutes an overhanging portion. In the example of FIG. 7, a tip portion 51Aa having an outer diameter equal to the outer diameter R0 of the protective cover portion 52 is formed closer to the pen tip than the protruding portion 80A.

Therefore, in this example, as shown in FIGS. 7A and 7B, a step is formed at the boundary between the pen tip side end of the protruding portion 80A and the tip portion 51Aa. An end surface 80Aa of the constituting overhanging portion 80A engages with the stepped portion 21s of the pen housing 2. Note that the holder part 51A is formed so as to have only the protruding shape part 80A without providing the tip part 51Aa, and the end surface 80Aa of the protruding shape part 80A is an example of a stopper part on the inner wall surface of the pen housing 2. It may be configured to engage with a certain step portion 2d.

In this embodiment, as shown in FIGS. 7A and 7B, a recess 80Ab is provided at a predetermined angular position in the circumferential direction of the protruding portion 80A of the holder portion 51A. On the other hand, in the case of this example, a protrusion that engages with the recess 80Ab is formed at a predetermined angular position in the circumferential direction of the inner wall surface near the step 2d of the pen housing 2, and the recess 80Ab The protrusion of the pen housing 2 is engaged with the protrusion of the pen housing 2, so that the electronic pen main body 3 is configured not to rotate about the axial direction. That is, the recessed portion 80Ab is used to prevent the electronic pen body 3 from rotating.

In this example, as shown in FIG. 7(B), on the outer circumferential surface of the protruding portion 80A of the holder portion 51A, a concave groove 80Ac along the axial direction is formed at a predetermined angular position in the circumferential direction. is formed. In this example, as shown in FIG. 7(B), the lead portions 41a and 41b at both ends of the coil 41 are housed in the groove 80Ac and guided into the protective cover portion 52. Inside the protective cover part 52, there is a circuit board held by a holder part 51A, and the lead parts 41a and 41b of the coil 41 are connected to the capacitors arranged on this circuit board, thereby forming a resonant circuit. is formed.

Although the above-mentioned embodiment has been described in the case of an electromagnetic induction type electronic pen, it is not limited to the electromagnetic induction type, and the same applies to the case of a capacitive type electronic pen such as an active capacitance type. Applicable to

1, 1A...electronic pen, 2,2A...pen housing, 2a, 2Aa...hollow part, 2b, 2Ab...opening, 2d, 2Ad...stepped part, 3...electronic pen body, 5...return spring, 10...knock cam Mechanism part, 12... Knock bar, 40... Signal transmission member, 50... Main body housing, 60... Elastic displacement part, 71... Pen pressure detection part, 72... Circuit board, 80... Overhanging part

In order to solve the above issues,
A cylindrical pen housing with an opening on the pen tip side and a hollow part inside;
The pen housing has a cylindrical main body housing that can be stored in the hollow portion, and a core body is attached to one end side in the axial direction of the main body housing, and the core body is attached to one end side in the axial direction of the main body housing. an electronic pen main body portion whose other end side in the direction is locked within the pen housing;
Equipped with
A projecting portion that extends in a direction intersecting the axial direction of the main body housing is formed at a predetermined position in the axial direction of the outer peripheral portion of the main body housing of the electronic pen body,
The inner wall surface of the hollow portion of the pen housing is engaged with the protruding portion of the main body housing in a state where the tip side of the core body is exposed to the outside from the opening of the pen housing. The present invention provides an electronic pen, characterized in that a stopper portion is formed within the pen housing to prevent movement of the electronic pen main body toward the pen tip.

FIG. 1 is a diagram for explaining an embodiment of an electronic pen and an embodiment of an electronic pen main body according to the present invention. FIG. 2 is a diagram for explaining an example of the configuration of the pen tip side of an embodiment of an electronic pen and an embodiment of an electronic pen main body. FIG. 2 is a diagram for explaining a configuration example of a pen tip side of an embodiment of an electronic pen main body. FIG. 6 is a diagram for explaining the movement of the pen tip side during a knock operation of a conventional knock-type electronic pen as a comparative example of the embodiment of the electronic pen according to the present invention. FIG. 3 is a diagram for explaining the movement of the pen tip side during a knock operation of the embodiment of the electronic pen according to the present invention. FIG. 7 is a cross-sectional view for explaining another embodiment of the electronic pen according to the present invention. FIG. 7 is a diagram for explaining another embodiment of the electronic pen main body according to the present invention.

In FIGS. 1A and 1B , the coil spring 5 changes from the extended state in which the pen tip side of the electronic pen body 3 is protruded as shown in FIG. This is a return spring (hereinafter referred to as return spring 5) for returning to the non-extended state shown in (A).

From the state shown in FIG. 4(B), the user further pushes in the knock bar 12PR to define the pen tip of the electronic pen body 3PR from the opening of the pen housing 2PR, as shown in FIG. 4(C). The protrusion length Lp or more is made to protrude. Then, the rotor of the knock cam mechanism part 10PR rotates, and as shown in FIG. 4(D), the pen tip of the electronic pen body part 3PR protrudes from the opening of the pen housing 2PR by a specified protrusion length Lp. , the knock cam mechanism 10PR is locked, and the feeding operation is completed.

As described above, in the case of the conventional knock-type electronic pen 1PR, as shown in FIGS. It is necessary to move the electronic pen body 3PR to the opening side of the pen housing 2PR so that the tip protrudes. There is a possibility that the coil of the signal transmitting member, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2PR , may come into contact with the inner wall surface of the pen housing 2PR .

Then, from the state shown in FIG. 5(A), the user of the electronic pen 1 presses down the knock bar 12 of the knock cam mechanism 10 against the elastic force of the return spring 5, resulting in the state shown in FIG. 5(B). As shown, when the pen tip side of the electronic pen body 3 is made to protrude from the opening of the pen housing 2 by the specified protrusion length Lp, the tension between the stepped part 2d of the pen housing 2 and the electronic pen body 3 increases. The protruding portion 80 is engaged with the pen tip side of the electronic pen main body portion 3 , and the pen tip side of the electronic pen body portion 3 is in a state in which it does not move any further in the direction of protruding from the opening 2b within the pen tip side housing portion 21.

From the state shown in FIG. 5(B), the user applies a pressure (load) that resists the elastic displacement force of the return spring 5, but is smaller than the elastic displacement force of the coil spring 62 of the elastic displacement section 60. ), when the knock rod 12 is pushed into the pen tip side, the rotor part 13 cannot be moved to the pen tip side.

Then, from the state shown in FIG. 5(B), when the user pushes in the knock rod 12 by applying a large pressure (load) that resists the elastic displacement force of the coil spring 62 of the elastic displacement section 60, the pen housing 2 Since the portion 2d and the protruding portion 80 of the electronic pen body 3 are engaged, the protrusion length of the pen tip side of the electronic pen body 3 remains the specified protrusion length Lp, but as shown in FIG. ), the coil spring 62 of the elastic displacement section 60 of the electronic pen main body 3 contracts, and the elastic displacement section 60 contracts in the axial direction. In response to this, the rotor 13 of the knock cam mechanism 10 moves in the axial direction and rotates, causing the pen tip of the electronic pen body 3 to protrude from the opening of the pen housing 2 by a specified protrusion length Lp. In this state, the knock cam mechanism section 10 is locked. Then, as shown in FIG. 5(D), the coil spring 62 of the elastic displacement section 60 of the electronic pen main body 3 that has contracted returns to its original state, and the contracted elastic displacement section 60 returns to its original length. Then, the electronic pen 1 enters a use state in which the pen tip portion is extended by the specified protrusion length Lp, and the pen tip portion is completely extended by the knocking operation.

As is clear from the above explanation, the length of the stroke in the axial direction during the knock operation of the knock cam mechanism when the pen tip side of the electronic pen main body 3 protrudes from the opening of the pen housing 2 is The length in the axial direction that the pen tip side of the electronic pen main body 3 moves during the knocking operation becomes smaller. That is, the pen tip side of the electronic pen main body 3 moves by the same amount as the pushing amount of the knock rod 12 until the protruding part 80 collides with the stepped part 2d of the pen housing 2, but it moves no further than that. do not. When pressure (load) resisting the coil spring 62 of the elastic displacement section 60 of the electronic pen main body 3 is applied to the knock rod 12, the elastic displacement section 60 of the electronic pen main body 3 moves along the length in the axial direction. change. This displacement of the length of the elastic displacement portion 60 of the electronic pen main body portion 3 becomes a part of the necessary stroke during the knock operation.

Also in the electronic pen 1A of this embodiment, the protruding portion 80 of the electronic pen body 3 engages with the stepped portion 2Ad of the pen housing 2A , so that the pen tip side of the electronic pen body 3 always The state of protruding by the specified protrusion length Lp is maintained. As a result, in the electronic pen 1A of this embodiment as well, the coil 41, which is an example of a component that should not come into contact with the inner wall surface of the pen housing 2A on the pen tip side of the electronic pen body 3, is inside the pen housing 2A. It can be prevented from coming into contact with the wall surface.

Also, in the electronic pen 1A of this embodiment, the diameter of the arcuate portion at the tip in the protruding direction of the overhanging portion 80 provided on the electronic pen body 3 is approximately equal to the inner diameter R5 of the pen housing 2A. Alternatively, since the diameter R6 is slightly smaller, the electronic pen main body 3 is also suppressed from being displaced in the direction orthogonal to the axial direction. Therefore, this also prevents the coil 41, which is an example of a component that should not be brought into contact with the inner wall surface of the pen housing 2A on the nib side of the electronic pen body 3, from coming into contact with the inner wall surface of the pen housing 2A. You can do it like this.

FIG. 7A is an enlarged view of the side of the holder portion 51A of the main body housing 50A in this example, which is connected to the signal transmitting member 40 made of the coil 41 wound around the ferrite core 42. Further, FIG. 7(B) is an enlarged perspective view of the signal transmitting member 40 including the coil 41 wound around the ferrite core 42 and the holder portion 51A of the main body housing 50A.

Therefore, in this example, as shown in FIGS. 7A and 7B, a step is formed at the boundary between the pen tip side end of the protruding portion 80A and the tip portion 51Aa. An end surface 80Aa of the constituting projecting shape portion 80A engages with the stepped portion 2d of the pen housing 2. Note that the holder part 51A is formed so as to have only the protruding shape part 80A without providing the tip part 51Aa, and the end surface 80Aa of the protruding shape part 80A is an example of a stopper part on the inner wall surface of the pen housing 2. It may be configured to engage with a certain step portion 2d.

In this embodiment, as shown in FIGS. 7A and 7B, a recess 80Ab is provided at a predetermined angular position in the circumferential direction of the protruding portion 80A of the holder portion 51A. On the other hand, in the case of this example, a protrusion that engages with the recess 80Ab is formed at a predetermined angular position in the circumferential direction of the inner wall surface near the step 2d of the pen housing 2, and the recess 80Ab The protrusion of the pen housing 2 is engaged with the protrusion of the pen housing 2, so that the electronic pen main body 3A is configured not to rotate about the axial direction. In other words, the recess 80Ab is for preventing rotation of the electronic pen main body 3A .

Claims (17)

A cylindrical pen housing with an opening on the pen tip side and a hollow part inside;
The pen housing has a cylindrical main body housing that can be stored in the hollow portion, and a core body is attached to one end side in the axial direction of the main body housing, and the core body is attached to one end side in the axial direction of the main body housing. an electronic pen main body portion whose other end side in the direction is locked within the pen housing;
Equipped with
A projecting portion that extends in a direction intersecting the axial direction of the main body housing is formed at a predetermined position in the axial direction of the outer peripheral portion of the main body housing of the electronic pen body,
The inner wall surface of the hollow portion of the pen housing is engaged with the protruding portion of the main body housing in a state where the tip side of the core body is exposed to the outside from the opening of the pen housing. An electronic pen, characterized in that a stopper portion is formed within the pen housing to prevent movement of the electronic pen main body toward the pen tip. The overhang has a length in the axial direction of the main body casing from the tip of the core attached to the main body casing to a portion of the overhang that engages with the stopper. , the pen tip side of the electronic pen main body portion, to which the core body is attached, extends in the axial direction from the tip position of the pen tip side of the pen housing to the stopper portion when the electronic pen is used. The outer circumferential portion of the main body housing has a length that is the sum of the length in the axial direction of the main body housing that is determined to be exposed to the outside from the opening on the pen tip side of the pen housing. The electronic pen according to claim 1, characterized in that: In a state in which the core attached to the electronic pen main body is exposed to the outside from the opening of the pen housing, and the protruding part of the main body housing is engaged with the stopper part. 2. The electronic pen according to claim 1, wherein the electronic pen main body is elastically biased toward the pen tip within the pen housing. When a load is applied to the electronic pen main body in the axial direction of the main body housing, the electronic pen main body elastically changes the length of the electronic pen main body in the axial direction according to the applied load. The electronic pen according to claim 1, further comprising an elastic displacement portion that is contracted and displaced. The electronic pen main body includes a pen pressure detection section within the main body housing that detects pen pressure applied to the core,
The elastic displacement section is insensitive to a load within the range of the pen pressure value detected by the pen pressure detection section, and is configured to absorb a load larger than the load within the range of the pen pressure value. The electronic pen according to claim 4, wherein the electronic pen is elastically displaced. A claim characterized in that the elastic displacement portion is provided on a side opposite to a side on which the core body is attached in an axial direction of the main body housing with respect to the main body housing. 4. The electronic pen described in 4. In a state in which the core attached to the electronic pen main body is exposed to the outside from the opening of the pen housing, and the protruding part of the main body housing is engaged with the stopper part. The electronic pen according to claim 4, wherein the electronic pen main body is elastically urged toward the pen tip within the pen housing by the elastic displacement section. The other end of the pen housing in the axial direction holds the other end of the main body housing in the axial direction, and the core body is attached to the main body housing of the electronic pen body. The electronic pen according to claim 4, further comprising a knock cam mechanism that causes the cam to protrude and retract from the opening on the pen tip side of the pen housing based on a knocking operation by a user. When the knocking operation is performed, the elastic displacement portion is in a state where the protruding portion of the main body housing of the electronic pen body engages with the stopper portion of the inner wall surface of the pen housing. The electronic pen according to claim 8, wherein the electronic pen is configured to undergo the elastic displacement. The protruding end surface of the protruding portion in a direction intersecting the axial direction of the main body casing abuts against the inner wall surface of the central portion of the pen casing, thereby adjusting the centerline position of the main body casing. The electronic pen according to claim 1, wherein the electronic pen is configured to maintain the same position as the center line position of the hollow portion of the pen housing. A coil wound around a magnetic core is provided on the nib side of the electronic pen body, and when the core protrudes from the opening on the nib side of the pen housing, The formation position of the protruding portion of the electronic pen main body in the axial direction of the main body casing and the pen are arranged so that the end of the coil on the pen tip side does not come into contact with the inner wall surface of the pen casing. The electronic pen according to claim 1, wherein the stopper portion on the inner wall surface of the housing is formed at a predetermined position in the axial direction of the pen housing. The electronic pen according to claim 1, wherein the stopper portion has a stepped portion formed on an inner wall surface of the pen housing. It has a cylindrical main body housing that can be stored in a hollow part of a cylindrical pen housing having an opening on the pen tip side, and a core body is attached to one end side in the axial direction of the main body housing, The other end side in the axial direction is an electronic pen main body portion that is locked in the pen housing,
A projecting portion that protrudes in a direction intersecting the axial direction is formed at a predetermined position in the axial direction of the outer peripheral portion of the main body housing,
When the tip side of the core body is exposed to the outside from the opening of the pen housing, the projecting portion of the main body housing is a stopper provided on an inner wall surface of the hollow portion of the pen housing. An electronic pen main body section, characterized in that the electronic pen main body section is configured to be engaged with the electronic pen main body section to prevent movement of the electronic pen main body section in the axial direction toward the pen tip side. The overhang has a length in the axial direction of the main body casing from the tip of the core attached to the main body casing to a portion of the overhang that engages with the stopper. , the pen tip side of the electronic pen main body portion, to which the core body is attached, extends in the axial direction from the tip position of the pen tip side of the pen housing to the stopper portion when the electronic pen is used. Disposed on the outer periphery of the main body housing such that the length is the sum of the length in the axial direction of the main body housing that is set to protrude from the opening on the pen tip side of the pen housing. The electronic pen main body according to claim 13, characterized in that: an elastic displacement section that elastically contracts and displaces the length of the electronic pen main body in the axial direction in accordance with the applied load when a load in the axial direction of the main body housing is applied; The electronic pen main body according to claim 13, characterized in that: A pen pressure detection unit that detects pen pressure applied to the core body is provided in the main body housing,
The elastic displacement section is insensitive to a load within the range of the pen pressure value detected by the pen pressure detection section, and is configured to absorb a load larger than the load within the range of the pen pressure value. The electronic pen main body according to claim 15, wherein the electronic pen main body is elastically displaced. A claim characterized in that the elastic displacement portion is provided on a side opposite to a side on which the core body is attached in an axial direction of the main body housing with respect to the main body housing. 15. The electronic pen according to 15.

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