JP5890693B2 - Information input pen - Google Patents

Description

The present invention relates to a capacitive coordinate input device connected to an information processing device such as a personal computer or a portable terminal or a capacitive input pad for inputting coordinate information to a display-integrated capacitive input device. It relates to a touch pen.

Conventionally, when inputting information to a capacitive coordinate input device or a display-integrated capacitive input device of a computer, the information is input directly with a finger.
However, the finger is disadvantageous in that the operability is inferior when the contact state with the input panel changes due to force adjustment and the position shifts or the finger slips due to sweat or the like.
Various proposals have already been made for such drawbacks. These are mainly composed of a conductive pen tip and a conductive shaft, and are proposals for enabling stable writing and position detection while ensuring conduction from the input panel to the finger.

First, a pen tip made of a water-absorbing material and a water retaining portion provided inside the shaft body are impregnated with water, and further, a connection from the input panel to the finger is ensured through the conductive shaft body (Patent Literature). 1). In this case, since the handwriting of water remains on the panel, accurate position information may not be input due to the influence of water on the panel surface when used continuously. Furthermore, it was possible to cause a fatal accident in which water is attached to an electronic device that is extremely precise.

Next, the present applicant has proposed that a conductive fiber brush or a conductive felt is used for the pen tip, and further that the conduction from the input panel to the finger is ensured through the conductive shaft (Patent Document). 2). In this case, the tip of the brush or felt is soft, and the touch at the time of input is soft and does not damage the input panel. However, since it is easily deformed, there is a drawback that accurate position information cannot be input.

In addition, the applicant of the present invention has proposed that a conductive rubber is used for the pen tip and that the conduction from the input panel to the finger is ensured through a conductive shaft (Patent Document 3). In this case, there was no problem with the pointing operation, and the feel during input was soft and did not damage the input panel. However, the sliding of the rubber was bad, and the sliding operation was highly resistant and comfortable to slide. could not.

Furthermore, using a fiber bundle in which conductive carbon fiber and resin fiber are blended into the pen tip and bonded by heat welding of a resin binder or resin fiber, and further from the input panel to fingers through the conductive shaft. The applicant of the present invention has proposed to ensure continuity (Patent Document 4). In this case, a nib with moderate sliding was obtained, and suitable operation was possible in both pointing and sliding operations. However, since the resin binder covers the outside of the conductive fiber, the conductivity may be impaired. In addition, since the carbon fibers are hard, the panel surface is damaged, and conversely, the carbon fibers are lost and fall off.

JP-A-8-44484 (Examples) JP-A-10-39989 (Claims etc.) Japanese Patent Laid-Open No. 10-161895 (claims, etc.) Japanese Patent Laid-Open No. 10-161796 (claims, etc.)

The object of the present invention is to eliminate the above-mentioned drawbacks, that is, without adhering a conductive liquid such as water to the input device, there is little displacement of the detection position due to writing pressure, good sliding during sliding operation, and flexible input An object of the present invention is to provide a touch pen for a capacitive input pad having an input tip that can be manufactured without using a material that has a feeling and damages the panel surface.

That is, this invention exists in following (1)-(10).
(1) An input touch pen for inputting information to a capacitive coordinate input device or a display-integrated capacitive input device, the input touch pen including a shaft and a brush that includes conductive fibers; An input touch pen comprising: an input tip having a bending strength higher than that of the hand brush and including a center core disposed at the center of the hand brush.
(2) The input touch pen according to (1), wherein the conductive fiber includes a conductive material.
(3) The touch pen for input according to (1), wherein the hand brush has a base, and an insertion hole through which the core is inserted is provided at the center of the base.
(4) The touch pen for input according to (3), wherein the brush is detachable from the shaft body.
(5) The touch pen for input according to (1), wherein the brush has a base portion, and the core is fixed at the center of the base portion.
(6) The input touch pen according to (3) or (5), wherein the input tip is detachable from the shaft body.
(7) The input touch pen according to (3) or (5), wherein the base is made of a conductive resin.
(8) The touch pen for input according to any one of (1) to (7), wherein the core has conductivity.
(9) The above-described (1) to (8), wherein the grip portion of the shaft body has conductivity, and the grip portion of the shaft body and the conductive fiber are electrically connected. The touch pen for input as described in any one of these.
(10) The input touch pen according to any one of (1) to (9), wherein a part made of a conductive material is built in the shaft body.

As described above, the touch pen of the present invention is composed of the brush tip including the conductive fiber and the core disposed at the center of the brush brush, as described above. Therefore, the capacitive input panel touch pen is less likely to damage the input panel, and has a good sliding property during sliding operation. In addition, by using the conductive fiber as the conductive resin, it is possible to provide a capacitive input panel touch pen that is less likely to damage the input panel.

It is a cross-sectional view of the commercially available conductive fiber used for the brushstroke of the input pen of this invention. It is a cross-sectional schematic diagram of the input pen of the 1st Embodiment of this invention. It is a cross-sectional schematic diagram of the input pen of the 2nd Embodiment of this invention. It is a cross-sectional schematic diagram of the input pen of the 3rd Embodiment of this invention.

The fiber used for the brush in the present invention is a conductive fiber. As shown in the cross-sectional view of FIG. 1A, the conductive fiber is made conductive by covering the fiber (α) based on a polyester resin, polyamide resin, etc. with a conductive material (β). Examples thereof include fibers having properties and fibers including a portion (δ) made of a conductive material inside the base material (γ) as shown in the cross-sectional view of FIG. In addition to these fibers, all the fibers may be made conductive by imparting conductivity, and at least a part of the fibers constituting the scribing brush may be made entirely of conductive resin.

Examples of the material of the conductive material that can be used for the fiber include a resin solution in which a conductive resin such as polypyrrole, polythiophene, polyethylenedioxythiophene, polyisothianaphthene, and polyaniline is dispersed or solubilized. When using these conductive materials, 2,3,7,8-tetracyano-1,4,6,9-tetraazanaphthalene, dodecylbenzenesulfonic acid, p-toluenesulfone are used in order to appropriately adjust the conductivity. A conductive resin to which a dopant such as an acid is added can be used. As described above, the commercially available conductive fibers are those in which a part of the fibers is a conductive material, but the conductive fibers may be constituted only by these conductive materials.

By the way, when a general resin solution in which carbon black, graphite, metal particles, or the like are dispersed as a conductive material or a molten resin is used, there is a problem of damaging the input panel. This is because, when the fiber of the brush brush is worn away by use or the like, there is a possibility that carbon black, graphite, metal particles, etc. may touch the input panel and be damaged.
For this reason, as a conductive fiber in this application, the conductive fiber containing conductive resin is preferable.

In order to make a conductive brushstroke using the fiber as a brush, the fibers containing the conductive resin are aligned and bundled, and the back of the bundle of fibers is heated and bound, or A step of impregnating a bundle of fibers with a resin solution in which the conductive material is dispersed or solubilized is added to the step of heating and binding the back of the bundle, and further solidifying these conductive resins. Alternatively, it can be obtained by heat curing these conductive resins.

In addition to the method of manufacturing a brush as described above, a base can be provided to form a bundle of fibers as a brush. That is, a brushstroke can be formed by a method such as forming a fused portion with a resin solution or the like at the rear end of a bundle of fibers, or bonding and fixing a resin plate or the like with a resin solution or the like at the rear end of a bundle of fibers. it can. The resin solution or the resin plate described above may be a conductive resin in order to ensure conductivity. This base can be flanged.

In addition, a center core is inserted into the center of the brushstroke. By providing this core in the center of the brushstroke, the mechanical strength such as the apparent bending strength of the brushstroke can be greatly improved. Examples of the core include a dense rod-shaped body, a rod-shaped body porous with a fiber bundle, and a rod-shaped body of a sintered product of particles. If it demonstrates from the side of a physical property, if it has the bending strength exceeding a brushstroke and has the flexibility which is less than a brushstroke, it can be used without a problem. Resin, metal, metal oxide, metalloid, metalloid oxide, etc. can be used for this core. Among these, resins are preferable from the viewpoint of moldability, and synthetic resins such as polyethylene, polypropylene, polyacetal, vinyl chloride, acrylic, and polycarbonate can be used. In the case where the product of the present invention prioritizes ensuring conductivity, these resins may be used as conductive resins.

The following can be considered as a method for inserting the core into the center of the brushstroke. First, in the case of a brush with no base at the rear end of the bundle of fibers, the core is inserted as it is from the center of the rear end of the brush. Secondly, in the case of a brush with a base provided at the rear end of a bundle of fibers, a method of inserting a core by providing an insertion hole for inserting a core at the center of the base. Thirdly, in the case where the base is to be provided at the rear end of the bundle of fibers, the base and the core are integrally formed in a shape in which the core is projected at the center inside the base, and the core is left as it is. Is inserted from the rear end of the bundle of fibers to form a brush.

As long as the pen shaft of the conductive fiber is sufficiently conductive, the pen shaft made of a non-conductive material can be input to the capacitive coordinate input device or the display-integrated capacitive input device. Is possible. However, when the conductivity of the brushstroke is small, or when the response of the capacitive coordinate input device or the display-integrated capacitive input device is inferior, a synthetic resin shaft blended with carbon black or metal fine particles, By using a shaft obtained by plating the surface of the synthetic resin shaft or a shaft made of a conductive metal, a shaft body in which the grip portion of the shaft body and the pen tip have conductivity is obtained. Further, the shaft body may be composed of a single component or a plurality of components such as a tip shaft, a shaft tube, and a tail plug as long as the grip portion of the shaft body and the pen tip have conductivity. Alternatively, the synthetic resin containing carbon black or metal fine particles is coated on the outer periphery of the member such as the front shaft or the shaft tube, the plating is applied, the coating made of a conductive metal is applied, or A conductive material coating may be applied. For fixing the core, the core fixing tool may be provided. Furthermore, the volume of the conductor can be reduced by storing a conductor such as a conductive fiber, a conductive sponge, a metal, or a graphite sintered body inside the shaft body so as to be electrically connected to the tip of the pen tip. The response of the capacitive coordinate input device or the display-integrated capacitive input device can be appropriately adjusted.

According to the pen of the present invention, the brush tip of the nib is electrically connected to the user's hand through the shaft. Accordingly, the brush brush is maintained at the same potential as the user's hand holding the shaft body, and is static while the capacitive coordinate input device or the display-integrated capacitive input device is in contact with the pen tip. A capacitance is formed. Even if this electrical conduction is small, the effect is exhibited.

When inputting coordinates to the capacitive coordinate input device or the display-integrated capacitive input device using the pen configured as described above, the user grasps the shaft body and puts the brush on the electrostatic capacitance. Input is performed by pressing against a type coordinate input device or a display-integrated capacitance type input device. Due to the presence of the center core, the brush can be appropriately deformed. As a result, the intended capacitance depending on the accurate contact area is formed between the user's hand and the capacitive coordinate input device or the display-integrated capacitive input device, and accurate input is achieved. Is possible.

And since the core is inserted in the center of the brush, it can prevent excessive deformation when pressed against the input device, and a soft feel similar to a brush and accurate input is possible. . Here, if the core is formed of a soft resin, it becomes a brush pen type input pen that can be used for a relatively sensitive pressure sensitive input pad.

If the core is composed of a fiber bundle or a resin sintered body, the density / porosity of the fiber bundle or sintered body can be adjusted to provide a softer input for the user. It becomes possible to make it feel. In other words, the bending strength and flexibility can be adjusted to desired values by changing the density and porosity of the core, and the soft feel can be set to the appropriate “writing resistance” and “input feeling” for the user who likes it. It becomes easy. At this time, by making the writing brush tip including the brush or the brush and the center core removable, the adjustment of “writing resistance” and “input feeling” by replacing the core becomes easier.

(First Embodiment) A pen according to an embodiment of the present invention will be described below with reference to the drawings.
First, FIG. 2 is a first embodiment, which is composed of a conductive shaft 1 and a brushbrush 2 and a tail plug 3 made of a bundle of fibers imparted with conductivity. The brush 2 has an outer diameter of 3 mm and tapers in a conical shape at the tip, enabling an input operation similar to a brush. The shaft body 1 is composed only of a conductive material. Here, the connecting part 11 of the shaft body 1 and the contact part 21 of the brush 2 are in contact / conduction. From the tip 22 of the brush 2 to the grip portion 12 of the shaft body 1 through the contact portion 21 and the connection portion 11, the conductive material is connected.

In the present embodiment, as described above, the core 4 is provided at the center of the brush 2. The core 4 is fixed by a core fixing part 14 inside the shaft. If the user does not like “writing resistance” or “feeling of input”, the user removes the brush 2 from the shaft 1 and adjusts the protruding dimension of the core, or after replacing the core itself, the brush 2 By re-mounting, you can work with your favorite “writing resistance” and “feeling of input”. In this example, the electrical resistance from the tip 22 to the gripping part 12 was measured, but the measured value fluctuated at a considerably high value and could not show a clear value, but the response to the input operation was not a problem at all. I was able to input the correct brush-like input.

(Second Embodiment) FIG. 3 shows a second embodiment, except that the base 23 is provided at the rear end of the brush 2 and the connecting portion 11 of the shaft body 1 and the outer periphery of the base 23 are in sliding contact. It is almost the same as the first embodiment. The center core 4 is inserted through a center core fixing tool 14 a that is fitted to the shaft body 1, and is further inserted through a through hole at the center of the base 23. In this embodiment, since the base portion 23 is formed of a conductive resin, the connection portion 11 of the shaft body 1 and the contact portion 21 of the scribing brush 2 are not electrically connected, and the connection portion 11 and the base portion 23 are not electrically connected. To ensure continuity. In this embodiment, the brush 23 can be removed and replaced more easily by the base 23. In this example, the electrical resistance from the tip 22 to the gripping part 12 was measured, but the measured value fluctuated at a considerably high value and could not show a clear value, but the response to the input operation was not a problem at all. I was able to input the correct brush-like input.

(Third Embodiment) FIG. 4 shows a third embodiment, which is composed of a conductive shaft body 1 and a bundle of fibers imparted with conductivity, and integrated with a core 4 molded with a conductive resin at the rear end. The brushbrush 2 provided with the flange-shaped base 23, the graphite sintered body 5 for directly connecting the shaft 4 and the core 4 extending further rearward from the base 23, and the tail plug 3. . In this embodiment, it is the structure connected from the tip 22 to the holding part 12 of the shaft body 1 through the base 23, the center core 4, and the graphite sintered body 5 with a conductive material. Conductivity is also secured at the contact portion between the connecting portion 11 and the base portion 23. In this embodiment, since the brush 2, the core 4 and the base 23 are integrated as an input tip, if the user does not like "writing resistance" or "input feeling", the entire input tip. By exchanging, you can make your favorite “writing resistance” and “input feeling”. In this example, the electrical resistance from the tip 22 to the gripping part 12 was measured, but the measured value fluctuated at a considerably high value and could not show a clear value, but the response to the input operation was not a problem at all. I was able to input the correct brush-like input.

(Fourth Embodiment) The fourth embodiment is configured in the same manner as the third embodiment except that the shaft body is a non-conductive shaft body. Also in this embodiment, since the brush 2, the core 4 and the base 23 are integrated as an input tip, if the user does not like "writing resistance" or "input feeling", the entire input tip. By exchanging, you can make your favorite “writing resistance” and “input feeling”. In this example, the electrical resistance from the tip 22 to the gripping part 12 was measured, but it was impossible to measure exceeding the upper limit (10 MΩ) of the measuring instrument, but accurate input similar to a brush could be performed without problems. It was.

As is clear from the above description, according to the electrostatic input touch pen of the present invention, when performing analog input from the input pad, that is, input such as drawing with a brush or paint brush, an appropriate “ Gives "writing resistance" and "feeling of input" and prompts correct input. Even if the user does not like these feelings, the “writing resistance” and “input feeling” can be easily adjusted by replacing the brushstroke or the input tip itself.

(Α), (γ) Fiber base material (β), (δ) Conductive material 1 Shaft body 11 Shaft body connection part 12 Gripping part 13 Tail plug fitting part 14 Core fixing part 14a Core fixing tool 2 Hot brush 21 Hot brush contact 22 Hot tip 23 Base 3 Tail plug 4 Core 5 Graphite sintered body

Claims (6)

An input touch pen for inputting information to a capacitive coordinate input device or a display-integrated capacitive input device, wherein the input touch pen includes a shaft body, a brush including conductive fibers, and the ear high bending strength than brush, a central core disposed in the center of the ear brush, Ri consists input tip containing the trailing edge of the ear brush has a flange-shaped base, the center-core conductive An input touch pen characterized by having a graphite sintered body built in the shaft body . The touch pen for input according to claim 1, wherein an insertion hole through which the core is inserted is provided at the center of the base. The touch pen for input according to claim 2 , wherein the brush is detachable from the shaft body. The touch pen for input according to claim 1, wherein the core is fixed at the center of the base. Input touch pen according to claim 2 or 4 wherein the input tip is characterized by a detachably attached to the shaft body. The base is input pen according to claim 2 or 4, characterized in that it consists of a conductive resin.

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