JP2012168934A - Pen for information input - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch pen for capacitance type input pad having an input tip which reduces the displacement of a detection position due to a pen pressure, has good slip in a slide operation, has a flexible input sense, and enables inputs like brush for calligraphy or painting and felt-tip pen.SOLUTION: In a touch pen for capacitance type input panel, an input tip comprises an elastic body including conductive resin and a center core arranged in the center of the elastic body. Therefore, a flexible input sense can be obtained and moreover, the displacement of a detection position due to a pen pressure is reduced, good slip in a slide operation is achieved, and damage to an input panel is hardly caused.

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.

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, wherein the input touch pen includes a shaft body and a conductive elastic body; An input touch pen comprising: an input tip including a central core disposed at a center of the elastic body having a higher bending strength than that of the conductive elastic body.
(2) The input touch pen according to (1), wherein the conductive elastic body is made of a conductive resin foam.
(3) The elastic body having conductivity has a base portion, and an insertion hole through which the core is inserted is provided at the center of the base portion. Touch pen.
(4) The input touch pen according to (3), wherein the conductive elastic body is detachable from the shaft body.
(5) The input touch pen according to (1), wherein the conductive elastic body has a base, and the core is fixed to the center of the base.
(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 of the conductive elastic body 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 gripping portion of the shaft body is conductive, and the gripping portion of the shaft body and the conductive elastic body are electrically connected to each other (1) The touch pen for input as described in any one of-(8).
(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 comprises an elastic body having a conductive input tip and a central core disposed at the center of the elastic body having the conductive property, so that a flexible input feeling can be obtained. In addition, the capacitive input panel touch pen is less susceptible to slippage during the sliding operation, and is less likely to damage the input panel. Further, by using a conductive resin foam as the conductive elastic body, 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 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 material used for the elastic body in the present invention includes natural rubber, polyacetal resin, acrylic resin, polyester resin, polyamide resin, polyurethane resin, polyolefin resin, polyvinyl resin, polycarbonate resin, and polyether resin. And a low-density molded article made of one or a combination of two or more such as polyphenylene resins. Among these molded products, resin molded products can be made conductive by kneading a conductive resin or carbon material or the like to give conductivity to the molded product itself. Alternatively, the resin molded product itself is made conductive to provide conductivity, or at least part of the low-density molded product constituting the elastic body is made of the conductive resin molded product. In this case, a material close to the target elastic body can be obtained.

Examples of the material of the conductive material that can be used for the elastic body 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.

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 a part of the elastic body is worn 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 an elastic body in this application, the molding of a conductive resin is preferable.

In order to use the molded product as an elastic body and to have a conductive input tip, a step of shaping the resin mixture containing the conductive resin to a low density or foaming the mixture is added. Can be obtained.

In addition to the method for producing an elastic body as described above, a base portion can be provided to make a bundle of fibers as a brushstroke. That is, it is formed at the same time as the elastic body by a method such as forming a fusion part by a resin solution etc. at the rear end of a bundle of short cut fibers, or fixing a resin plate etc. to the rear end of the elastic body by a resin solution etc. Can be made. The resin solution or the resin plate described above may be a conductive resin in order to ensure conductivity. In order to make it easy to contact or fit the connecting portion of the shaft body described later, this base portion is provided with a flange-like shape at the rear end of the elastic body, which is convenient for assembling or replacing the elastic body. Can increase the sex.

Moreover, you may insert a center core in the center part of the said elastic body. By providing this central core at the center of the elastic body, the mechanical strength such as the apparent bending strength of the elastic body 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 is a rod-shaped body which has the bending strength exceeding an elastic body and has the flexibility below an elastic body, 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 is given priority to ensuring conductivity, these resins may be a resin containing a conductive resin or a conductive material.

As a method for inserting the central core into the central portion of the elastic body, the following forms are conceivable. First, when the elastic body is not provided with a base at the rear end of the elastic body, the core is inserted as it is from the center of the rear end of the elastic body. Second, in the case of an elastic body provided with a base at the rear end of the elastic body, an insertion hole for inserting a core is provided at the center of the base to insert the core. Thirdly, it is a case where a base is to be provided at the rear end of the elastic body, but the base and the core are integrally formed in a shape in which the core is protruded from the center inside the base, and the core is used as it is. The elastic body is formed by inserting from the rear end of the elastic body.

If the shaft of the pen is sufficiently conductive, the shaft made of a non-conductive material can be input to the capacitive coordinate input device or the display-integrated capacitive input device. . However, when the conductivity of the elastic body is small, or when the response performance 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 that is plated on the surface of the synthetic resin shaft or a shaft made of metal or conductive resin, if the shaft body is made such that the gripping part of the shaft body and the pen tip have conductivity, the responsiveness is further improved. A good pen. 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 peripheral portion of the member such as the tip shaft or the shaft tube, the plating is applied, the metal coating is applied, or the above-mentioned conductivity A coating of material may be applied. For fixing the core, a core fixing tool may be provided. Furthermore, by storing a conductor such as conductive fiber, conductive sponge, metal, graphite sintered body so as to be electrically connected to the pen tip inside the shaft body, the volume of the conductor is increased, The responsiveness of the capacitive coordinate input device or the display-integrated capacitive input device can be appropriately adjusted.

When inputting coordinates to the capacitive coordinate input device or the display-integrated electrostatic input device using the pen configured as described above, the user holds the shaft body and the elastic body to the capacitive coordinate input device. Input is performed by pressing against the input device or the display-integrated electrostatic input device. When the center core is inserted, it can be deformed so as to obtain a repulsive force desired by the user with a harder feeling than in the case of only the elastic body. As a result, an intended capacitance depending on an accurate contact area is formed between the capacitive coordinate input device or the display-integrated electrostatic input device and the elastic body, thereby enabling an accurate input. .

Further, by inserting the core into the center of the elastic body, it is possible to prevent excessive deformation when pressed against the input device, and a soft touch similar to a brush or a paintbrush and accurate input is possible.
Here, if the core is formed of resin, a felt pen type input pen that can be used for a relatively sensitive pressure-sensitive input pad is obtained.

If the core is composed of a fiber bundle, or if the core is composed of a resin sintered body, the density of the fiber bundle or the sintered body is adjusted to adjust the density, porosity, etc. When inserted and used, it is possible for the user to feel appropriate input. That is, it becomes easy to adjust the bending strength and flexibility to desired values by changing the density, porosity, etc. of the core, and to make the “writing resistance” and “input feeling” appropriate for the user. At this time, by making the input end including the elastic body or the elastic body and the core detachable, adjustment of “writing resistance” and “input feeling” by replacing the core becomes easier.

In addition, the fact that the elastic body is detachable means that it can be easily replaced when the elastic body deteriorates. The deterioration mentioned here includes physical deterioration such as wear or loss of the elastic body due to continuous use, or oxidation or dissolution of the conductive material constituting the elastic body by an organic solvent, swelling, and the like.

(First Embodiment) A pen according to an embodiment of the present invention will be described below with reference to the drawings.
First, FIG. 1 shows a first embodiment, which includes a conductive shaft 1, an elastic body 2 made of a bundle of fibers imparted with conductivity, and a tail plug 3. The elastic body 2 has an outer diameter of 3 mm and has a cylindrical shape, and an input operation similar to a brush or paintbrush is possible. The shaft body 1 is composed only of a conductive material. Here, the connection part 11 of the shaft body 1 and the contact part 21 of the elastic body 2 are in contact and conduction. From the front end 22 of the elastic body 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 elastic body 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 elastic body 2 is pulled out from the shaft body 1 to adjust the protruding dimension of the core, or after replacing the core itself, the elastic body 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 there was no response to the input operation. There was no problem and accurate input was possible.

(Second Embodiment) FIG. 2 shows a second embodiment, except that the base 23 is provided at the rear end of the elastic body 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 elastic body 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 elastic body 2 can be more easily removed and replaced 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 there was no response to the input operation. There was no problem and accurate input was possible.

(Third Embodiment) FIG. 3 shows a third embodiment. The core 4 is formed of a conductive resin and foamed resin, which is provided with conductivity and is molded with a conductive resin at the rear end. And an elastic body 2 provided with an integral flange-like base 23, a graphite sintered body 5 for direct conduction between the shaft 4 and the core 4 extending further rearward from the base 23, and a tail plug 3. ing. In this embodiment, it is the structure which is connected with the electroconductive material from the front-end | tip 22, to the holding part 12 of the shaft body 1 through the base 23, the center core 4, and the graphite sintered compact 5. FIG. Conductivity is also secured at the contact portion between the connecting portion 11 and the base portion 23. In this embodiment, since the elastic body 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 there was no response to the input operation. There was no problem and accurate input was possible.

(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 elastic body 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 beyond the upper limit (10 MΩ) of the measuring device. Could be done.

As is clear from the above description, according to the electrostatic input touch pen of the present invention, when performing an analog input from the input pad, that is, an input drawn with a brush, paintbrush or felt pen, etc. Appropriate input can be promoted by giving appropriate “writing resistance” and “feeling of input”.
Even if the user does not like these feelings, the “writing resistance” and “input feeling” can be easily adjusted by replacing the elastic body or the input tip itself.

DESCRIPTION OF SYMBOLS 1 Shaft body 11 Shaft body connection part 12 Grip part 13 Tail plug fitting part 14 Center core fixing | fixed part 14a Center core fixing tool 2 Elastic body 21 Elastic body contact part 22 Elastic body front end 23 Base 3 Tail plug 4 Center core 5 Sintered graphite

Claims (10)

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, a conductive elastic body, and the conductive An input touch pen comprising: an input tip including a central core disposed at the center of the elastic body having a higher bending strength than the elastic body having a conductive property. The touch pen for input according to claim 1, wherein the conductive elastic body is made of a conductive resin foam. The input touch pen according to claim 1, wherein the conductive elastic body has a base, and 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 3, wherein the elastic body having conductivity is detachable from the shaft body. The touch pen for input according to claim 1, wherein the elastic body having conductivity has a base, and the core is fixed to the center of the base. 6. The input touch pen according to claim 3, wherein the input tip is detachable from the shaft body. 6. The input touch pen according to claim 3, wherein the base of the conductive elastic body is made of a conductive resin. The touch pen for input according to claim 1, wherein the core has conductivity. The grip portion of the shaft body has conductivity, and the grip portion of the shaft body and the elastic body having conductivity are electrically connected to each other. The touch pen for input as described in one. The touch pen for input according to claim 1, wherein a part made of a conductive material is built in the shaft body.

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