JP2013218593A - Electrostatic type input pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrostatic type input pen which can be elastically deformed until a top end chip 2 reaches a contact area showing an input reaction to the operation area of an input device even when an input is performed in a state where a shaft cylinder 5 of the electrostatic type input pen 1 is included.SOLUTION: An electrostatic type input pen 1 includes: a top end chip 2 formed with an almost cylindrical shape, and formed with a hemispherical dome part at the front edge, and made of conductive rubber at the front part of a shaft cylinder 5; and a core 3 whose front part is stored inside the top end chip 2. The top end of the core 3 is protruded from the front edge of the shaft cylinder 5, and a small diameter part 3e is formed at the front part of the core 3, and a gap part K is formed between the outside surface of the core 3 and the inside surface of the top end chip 2.

Description

  The present invention relates to an electrostatic input pen used in a capacitive input device that allows selection or movement of a cursor by touching an operation area with a tip of an input pen.

  2. Description of the Related Art Conventionally, as described in Patent Document 1, there is known an electrostatic input pen in which a tip end made of conductive rubber is provided at a front portion of a shaft cylinder. Also, recently, as described in Patent Document 2, a thin touch panel type input device that is used by hand is gaining popularity in the market, and not only performs input with a fingertip but also a writing instrument. There is also a growing demand for an electrostatic input pen that can be used by holding a shaft tube for input.

  By the way, since most of the touch panel type input devices have an input reaction when the contact area of the tip is 16 square millimeters or more, the electrostatic input pen has a tip made of conductive rubber. A structure in which input is performed by increasing the contact area by elastic deformation is widely adopted. Many electrostatic input pens have a core disposed inside the tip so that the tip does not elastically deform. The tip of the core protrudes from the front end of the shaft tube, and the front end of the core supports the inner surface of the tip when the tip is brought into contact with the operation area of the input device. It has a structure that does not cause elastic deformation to the extent that a load is applied.

Japanese Patent No. 4142276 JP 2011-81825 A

  By the way, those who write on the paper with the writing instrument tilted tend to perform input by tilting the shaft cylinder of the electrostatic input pen with respect to the operation area of the input device. In the structure in which the core is disposed, the tip of the core comes into contact with the tip when the shaft tube is inclined to input, and the tip of the tip reaches a contact area where the input device can show an input reaction. May not be able to elastically deform.

  Therefore, in order to solve the above-described conventional problems, the present invention provides that the tip of the tip of the input pen is located with respect to the operation area of the input device even when the input tube is tilted. An object of the present invention is to provide an electrostatic input pen that can be elastically deformed until a contact area showing an input reaction is reached.

The present invention
“1. An electrostatic input pen used in an input device that operates an operation area with an input pen or a finger and detects a position of an operation portion of the operation area by a capacitance method, wherein the electrostatic input pen is A front end tip made of conductive rubber having a substantially cylindrical shape and a hemispherical dome formed at the front end in front of the shaft tube, and a core whose front portion is accommodated inside the front end tip, A gap is formed between the outer surface of the core and the inner surface of the tip by projecting the tip of the core from the front end of the shaft cylinder and forming a small diameter portion in front of the core. An electrostatic input pen characterized by
2. 2. The electrostatic input pen according to claim 1, wherein a rear end of the small-diameter portion of the core is positioned behind the front end of the shaft cylinder. Is.

  The small-diameter portion formed in front of the core has a gap formed between the outer side surface of the core and the inner side surface of the tip, so that the inner surface of the tip is inclined when the shaft cylinder is tilted for input. The shape of the small diameter part is such that the front part is made thinner overall by providing a step part, or the front part is gradually moved toward the tip. It is possible to make a tapered cone shape. The gap formed between the outer side surface of the core and the inner side surface of the tip may be appropriately set according to the rubber hardness of the tip made of conductive rubber and the diameter of the substantially cylindrical tip. However, when the input tube is tilted and input is performed on the operation region, the tip tip contact area is 16 square millimeters or more even when the shaft tube is inclined 45 degrees with respect to the operation region. It is preferable to set with the dimension which becomes. In addition, when the core performs input to the operation area without tilting the shaft cylinder of the electrostatic input pen, the tip of the tip is damaged when the inner surface of the tip is brought into contact with the tip of the core. In order to prevent this, it is preferable to form the tip of the core in a curved shape. The shaft tube may have a configuration in which a base is mounted in front of the shaft tube main body.

  Further, when the rear end of the small diameter portion of the core is positioned behind the front end of the shaft tube, a configuration in which the small diameter portion is formed in front of the core by providing a step portion is preferable. By positioning it behind the front end of the tube, the rear end of the small diameter portion of the core can be positioned behind the front end of the shaft tube.

  According to the electrostatic input pen of the present invention, even when input is performed in a state where the shaft tube is inclined, the tip tip is elastically deformed until the contact area showing the input reaction with respect to the operation region of the input device is reached. It became possible.

FIG. 1 is a diagram illustrating an electrostatic input pen according to the present embodiment. FIG. 2 is a cross-sectional view showing a main part of FIG. FIG. 3 is a diagram illustrating a state in which input is performed with the shaft cylinder of the electrostatic input pen of the present embodiment standing vertically with respect to the operation area of the input device. FIG. 4 is a diagram schematically showing a contact portion between the tip and the operation area of the input device in the state of FIG. FIG. 5 is a diagram illustrating a state in which the shaft cylinder of the electrostatic input pen according to the present embodiment is input by being inclined 45 degrees with respect to the operation area of the input device. FIG. 6 is a diagram illustrating a state in which the shaft cylinder is laterally moved in the direction of the arrow X in a state where the shaft tube is inclined at 45 degrees. FIG. 7 is a diagram illustrating a state in which input is performed by tilting the shaft cylinder of the electrostatic input pen of the comparative example by 45 degrees with respect to the operation area of the input device. FIG. 8 is a diagram schematically showing a contact portion between the tip and the operation area of the input device in the state of FIG. FIG. 9 is a diagram showing a state in which the shaft cylinder of the electrostatic input pen of the comparative example is tilted by 20 degrees from the vertical state with respect to the operation area of the input device and input is performed.

  Embodiments of an electrostatic input pen according to the present invention will be described below with reference to the drawings. In addition, in order to make explanation easy to understand, the same number is attached | subjected about the same member and the same part in drawing. In the description of this embodiment, the tip end side is expressed as the front side, and the opposite side is expressed as the rear side.

  Hereinafter, the electrostatic input pen of this embodiment will be described with reference to FIGS. 1 and 2. The electrostatic input pen 1 has a front end tip 2 having a hemispherical dome portion 2a formed on the front and a front portion 3a of the core 3 fitted on a cylindrical straight portion 2b formed rearward of the front end tip 2. The tip 4 and the core 3 are inserted into the base 4, and the rear thin portion 4 a of the base 4 is caulked to the concave portion 3 c formed in the rear large diameter portion 3 b of the core 3 and fixed by the crimping portion 4 b formed. It is. Further, a step portion 3d is formed in the front portion 3a of the core 3, and a gap portion is formed between the outer side surface of the core 3 and the inner side surface of the tip 2 with a small diameter portion 3e in front of the step portion 3d. K is generated. Further, in this embodiment, as shown in the figure, the tip of the core 3 is protruded from the front end of the base 4, and the step portion 3 d that is the rear end of the small diameter portion 3 e of the core 3 is rearward from the front end of the base 4. The gap portion K is formed so as to enter the shaft cylinder 5.

  In the present embodiment, the male screw portion 4 c formed on the base 4 is screwed into the female screw portion 5 a formed on the front side of the cylindrical shaft body 50 to form the shaft tube 5, and the shaft tube 5 is disposed behind the shaft tube 5. Has a tail plug 6 made of resin. In this embodiment, the tip 2 is formed of conductive silicon rubber obtained by kneading carbon powder in silicon rubber, and the core 3, the base 4 and the shaft cylinder body 50 are formed of brass. It is possible to conduct to the hand holding the tube 5 and the dome portion 2a in front of the tip 2. The tip 2 is made of conductive silicon rubber having a rubber hardness determined by JIS-K6253: 2006, and the thickness of the hemispherical dome 2a is 0.75 mm.

  Next, with the electrostatic input pen according to the present embodiment with reference to FIGS. 3 to 6, an input device that operates the operation area with an input pen or a finger and detects the position of the operation portion of the operation area by a capacitance method. A state where the operation is performed will be described. In FIG. 3, the shaft cylinder 5 of the electrostatic input pen 1 performs input in a state where the shaft cylinder 5 stands vertically with respect to the operation area 7 of the input device, and the dome portion 2 a of the tip 2 is in contact with the input surface 7 a. Contact is made with a diameter L1 (5.0 mm), and the dome portion 2a (see FIG. 2) of the tip 2 is elastically deformed as shown in FIG. 4 and input with a circular contact area S1 (19.6 square millimeters). The input device could show an input reaction due to contact with the surface 7a.

  Further, in FIG. 5, the input is performed in a state where the shaft cylinder 5 of the electrostatic input pen 1 is inclined by 45 degrees with respect to the operation area 7 of the input device, but the tip 2 is arranged on the outer surface of the core 3. And the inner surface of the tip 2 can be elastically deformed in the lateral direction on the gap K side, so that the dome portion 2a of the tip 2 has a diameter L1 (5. In the same manner as shown in FIG. 4, the dome portion 2a of the tip 2 can contact the input surface 7a with a circular contact area S1 (19.6 square millimeters).

  In FIG. 6, the shaft cylinder is laterally moved in the direction of the arrow X in a state where the shaft cylinder is inclined at 45 degrees, and the tip 2 is further elastically deformed in the lateral direction, but the gap K is inward of the shaft cylinder 5. Since it is formed so as to enter, the amount of deformation of the tip 2 due to lateral movement can be further absorbed, and the dome portion 2a of the tip 2 comes into contact with the input surface 7a with a diameter L1 (5.0 mm). The input reaction could be shown in the input device with the same contact area as in FIG.

  Next, a comparative example will be described with reference to FIGS. As shown in FIG. 7, the electrostatic input pen 10 of the comparative example does not have a small-diameter portion in the front portion 30 a of the core 30, and the outer surface of the core 30 and the inner surface of the tip 2 are Except for the points adjacent to each other, it is the same as the above-described embodiment, and the description of other points is omitted. In FIG. 6, the input is performed in a state where the shaft cylinder 5 of the electrostatic input pen 10 is inclined 45 degrees with respect to the operation area 7 of the input device, but the tip 2 is placed on the front portion 30 a of the core 30. By abutting, the dome portion 2a of the tip 2 comes into contact with the input surface 7a with a diameter L2 (4.0 mm), and the dome 2a (see FIG. 2) of the tip 2 as shown in FIG. The input surface 7a was contacted with a circular contact area S2 (12.6 square millimeters), and the input response of the input device was dull. In addition, in order to stabilize the input reaction of the electrostatic input pen 10 of the comparative example, as shown in FIG. 9, it is possible to cope only with an inclination angle of about 20 degrees from the vertical state. It was.

  The electrostatic input pen of the present invention is suitable for a person who writes on the paper with the writing instrument tilted, and is used by tilting the input device by holding it with a hand, instead of using it horizontally on a desk or the like. It is also suitable for such situations.

1 ... Electrostatic input pen,
2 ... Tip, 2a ... Dome, 2b ... Straight,
3 ... core, 3a ... front part, 3b ... large rear diameter part, 3c ... concave part, 3d ... step part,
3e ... small diameter part,
4 ... base, 4a ... rear thin part, 4b ... caulking part,
5 ... Shaft cylinder, 5a ... Female screw part, 50 ... Shaft member,
6 ... Tail plug,
7: Operation area, 7a: Input surface.

Claims (2)

An electrostatic input pen used in an input device that operates an operation area with an input pen or a finger and detects a position of an operation portion of the operation area by a capacitance method, wherein the electrostatic input pen is a shaft cylinder A front end tip made of conductive rubber having a substantially cylindrical shape and a hemispherical dome portion at the front end, and a core whose front portion is housed inside the front end tip. A gap portion is formed between the outer side surface of the core and the inner side surface of the tip by projecting the tip of the core tube from the front end of the shaft cylinder and forming a small diameter portion in front of the core. Characteristic electrostatic input pen. 2. The electrostatic input pen according to claim 1, wherein a rear end of the small-diameter portion of the core is positioned behind a front end of the shaft cylinder.

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