JP2014081792A - Pen type input device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pen type input device having high input accuracy without damaging the surface of a touch panel regardless of its thin pen shaft.SOLUTION: A base end side of a metallic rod-like pen core 2 is held with a metallic holding material 3, and a pen shaft 4 made of a hollow metallic cylindrical member is fixed to the holding material 3 while covering the holding material 3. A tip of the pen core 2 protruding from the holding material 3 is covered with a pen tip protective member 5 made of a conductive resin material, and the pen core 2 between the pen tip protective member 5 and the tip of the pen core 2 is covered with a pen tip reinforcement material 6 made of an insulating material. The pen tip protective member 5 is insert-molded by flowing the conductive resin material into a stopper concave part 2a formed at the tip of the pen core 2.

Description

  The present invention relates to a pen-type input device for inputting to a touch panel such as a portable terminal, in particular, a capacitive touch panel.

  Conventionally, a pen-type input device (also referred to as a stylus pen) for a capacitive touch panel is known. For example, as in Patent Document 1, it is known to use a hollow material for a pen shaft in order to incorporate a circuit component such as a capacitor inside. Further, as in Patent Document 2, it is known to use conductive rubber for the pen tip so as not to damage the touch panel surface.

JP 2010-39610 A Japanese Patent Laid-Open No. 10-171579

  However, if the pen shaft is composed of only a hollow material as in a conventional pen-type input device, the strength surface is not sufficient, and conversely, if a solid material is used, the mass becomes heavy.

  In addition, in the capacitive touch panel, it is necessary to ensure electrical continuity between the part with the pen and the tip of the pen, but with a thin pen, when conductive rubber is used, the cross-sectional area of the conductive part is There is a problem that the touch panel becomes defective and the resistance value becomes too large, resulting in malfunction of the touch panel.

  Therefore, it is conceivable that the pen core is made of a metal material. However, when the pen core becomes thin, it becomes difficult to solder the pen core to the pen shaft. In addition, if the pen tip is made of a metal material, there is a problem that the touch panel surface is damaged.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a pen-type input device with high input accuracy without damaging the touch panel surface even if it is a thin pen shaft. There is to do.

  In order to achieve the above object, in the present invention, a metal material, a conductive resin material, and an insulating material are properly used.

Specifically, in the first invention, in the pen-type input device for a touch panel,
A metal rod-shaped pen core,
A metal holding material for holding the base end side of the pen core;
A pen shaft made of a hollow metal cylinder member, which is fixed to the holding material in a state of covering the holding material,
A pen point protection member made of a conductive resin material covering the tip of the pen core protruding from the holding material;
A pen nib reinforcement made of an insulating material that covers the pen core between the nib protection member and the pen shaft tip;
At the tip of the pen core, a retaining recess for preventing the pen tip protecting member from falling off is formed, and insert molding is performed so that at least a part of the pen tip protecting member flows into the retaining recess.

  According to the above configuration, the touch panel surface can be prevented from being scratched while the resistance value is not increased by making the pen core made of metal and covering the tip with the pen tip protection member made of a conductive resin material. . Further, since the pen core is held by a metal holding material and fixed to the metal pen shaft, the strength is ensured while preventing the resistance value from increasing. Furthermore, since the nib reinforcement near the nib is made of an insulating material, malfunction of the touch panel when the nib is tilted is reliably prevented.

  As described above, according to the present invention, the metal holding material for holding the metal pen core is covered with the metal pen shaft, the pen tip is covered with the conductive pen tip protecting member, and then the insulating pen tip is reinforced. Since the material is reinforced with the material, the pen-type input device can have high input accuracy without damaging the surface of the touch panel even if it is a thin pen shaft.

It is sectional drawing which expands and shows the front end side of a stylus pen. The whole stylus pen is shown, (a) is a side view, (b) is a sectional view taken along the line IIb-IIb in (a).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an enlarged cross-sectional view of the tip side of a stylus pen as a pen-type input device. FIG. 2 shows the entire stylus pen, where (a) is a side view and (b) is a cross-sectional view taken along the line IIb-IIb in (a). The stylus pen 1 for a touch panel is a device that inputs by making contact with a capacitive touch panel of a portable terminal (not shown).

  The stylus pen 1 includes a metal rod-shaped pen core 2. The pen core 2 is, for example, a stainless steel round bar to ensure strength. At the tip of the round bar, a retaining recess 2a whose outer periphery is recessed annularly is cut.

  On the proximal end side of the pen core 2, a cylindrical holding material 3 made of, for example, brass having good conductivity is caulked. The holding material 3 is covered with a pen shaft 4 made of a hollow metal cylinder member in a state of covering the proximal end side of the pen core 2 including the holding material 3. The pen shaft 4 is made of, for example, a stainless steel round pipe, and the holding member 3 is caulked to prevent the pen shaft 4 from coming off.

  The tip of the pen core 2 that further protrudes from the holding material 3 is covered with a pen tip protection member 5 made of a conductive resin material. The nib protection member 5 is insert-molded together with, for example, the pen core 2 and is prevented from coming off when the pen nib protection member 5 flows into the retaining recess 2a at the tip of the pen core 2 at the time of insert molding. In the present embodiment, the pen point protection member 5 extends to the central portion of the pen core 2, but does not need to extend to the central portion, and may be long enough to cover at least the retaining recess 2a.

  A space between the pen tip protection member 5 and the tip of the pen shaft 4 is covered with a pen tip reinforcing material 6 made of an insulating material. The nib reinforcing member 6 is made of, for example, ABS resin, and has a truncated cone shape with an outer diameter gradually decreasing toward the tip and having a through hole 6a in the center.

  A pen head 7 made of, for example, an elastomer is fixed to the base end side of the pen shaft 4 by caulking.

  As these assembly procedures, for example, the pen tip protection member 5 is insert-molded into the pen core 2, the base end side of the pen core 2 is inserted into the through hole 6 a of the pen tip reinforcement member 6, and the base of the pen core 2 is inserted. The holding material 3 may be inserted into the end side and caulked, and then the pen shaft 4 may be inserted and the holding material 3 may be caulked. Further, after the pen head 7 is inserted into the proximal end side of the pen shaft 4, it is fixed by caulking.

  In this way, the pen core 2 is made of metal, and the tip thereof is covered with the pen tip protection member 5 made of a conductive resin material, so that the touch panel surface can be prevented from being damaged while the resistance value is not increased. .

  Further, since the pen core 2 is held by the metal holding member 3 and fixed to the metal pen shaft 4, the strength is ensured while preventing the resistance value from increasing.

  Furthermore, by configuring the nib reinforcement 6 in the vicinity of the nib with an insulating material, it is possible to reliably prevent a malfunction of the touch panel in which the touch panel reacts at a position other than the nib when the nib is tilted.

  Therefore, according to the stylus pen 1 according to the present embodiment, even the thin pen shaft 4 can have high input accuracy without damaging the touch panel surface.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use. The technical features described in each embodiment can be combined with each other, and a new technical feature can be formed by combining them.

  As described above, the present invention is particularly useful for a pen-type input device for inputting to a capacitive touch panel.

1 Stylus pen
2 Pen core
2a Recessed recess
3 Holding material
4 Pen axis
5 Nib protection member
6 Nib reinforcement
6a Through hole
7 Pen head

Claims (1)

In a pen-type input device for touch panels,
A metal rod-shaped pen core,
A metal holding material for holding the base end side of the pen core;
A pen shaft made of a hollow metal cylinder member, which is fixed to the holding material in a state of covering the holding material,
A pen point protection member made of a conductive resin material covering the tip of the pen core protruding from the holding material;
A pen nib reinforcement made of an insulating material that covers the pen core between the nib protection member and the pen shaft tip;
The pen core tip is formed with a retaining recess for preventing the pen tip protecting member from falling off, and is insert-molded so that at least a part of the pen tip protecting member flows into the retaining recess. A pen-type input device.

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