JP2013248775A - Friction implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction implement configured to heat discolor only a target portion in a wide area of handwriting using a thermochromic ink on a paper face, and to prevent the contamination of a friction part of a friction body.SOLUTION: A friction body 2 is formed into a flat shape allowing a front surface 2a and a backside 2b to approximate each other, a case body 3 is formed so that a front surface wall 3a and a backside wall 3b are continuous to each other by a continuously-connecting part 3e, the friction body 2 is encased in the case 3 by being pivoted by a shaft 2f for continuously-connecting the one-end side 2c of the friction body 2 and the one-end side 3c of the case body 3, and the other end side 2d of the friction body 2 is paid out from the case body 3 by turning the friction body 2 which the shaft 2f as a fulcrum, thus forming a friction part 2h.

Description

  The present invention relates to a friction tool. More specifically, the present invention relates to a friction tool provided with a friction body capable of rubbing a handwriting with a thermochromic ink on a paper surface and thermally changing the handwriting of the thermochromic ink with frictional heat generated at that time.

  Conventionally, there are, for example, Patent Document 1 and Patent Document 2 as elastic friction bodies that change the color of a handwriting formed using reversible thermochromic ink from a first state to a second state by frictional heat.

JP 2004-148744 A JP 2009-126102 A

  In the friction body as described in Patent Document 1, the cross-sectional shape is generally circular or square, and by using the tip, edge, or corner, the thermochromic property on the paper surface. Although it was considered to thermally discolor a narrow area of the handwriting by ink, it was not considered to thermally discolor a wide area of the handwriting, and a small friction body as described in Patent Document 1 was rubbed. However, it was difficult to move gradually and rub a large area. It should be noted that the hot air from the dryer may be used to thermally discolor a large area, but the hot air from the dryer spreads when it hits the paper, making it difficult to discolor only the target location. Met.

  In addition, the friction body is required to have a structure that prevents it from becoming dirty in a state where it is accommodated in a pencil case or the like. The friction body is accommodated in the top of the cap so that the friction body protrudes from the top of the cap when necessary. The structure to be used is disclosed in Patent Document 2. However, since the friction body must be housed in a small part called a cap, the size of the friction body is limited, and it has been difficult to attach a friction body that thermally discolors a large area of handwriting to the cap. If it is possible to rub a large area by simply forming the friction body large, it is conceivable to place the friction body in the case body, but since the friction body is made of an elastic material, the slipperiness is poor. The operability when the friction body in the accommodated state is taken in and out of the case body is regarded as a problem.

  The present invention solves the above-described conventional problems, and can thermally discolor only a target portion in a large area of a handwriting with a thermochromic ink on a paper surface, and a friction portion of a friction body is soiled. It is an object of the present invention to provide a friction tool that can prevent the above-described friction.

The present invention
“1. A frictional body made of an elastic material that can rub the thermochromic handwriting formed on the paper surface with thermochromic ink and that can thermally discolor the thermochromic handwriting by the frictional heat generated in that case. A friction tool held by a body, wherein the friction body is formed in a flat shape in which a front surface portion and a back surface portion are close to each other, and the case body is formed so that the front surface wall and the back surface wall are connected at a connecting portion. The friction body is accommodated in the case body by pivotally supporting a shaft portion connecting one end side of the friction body and one end side of the case body, and the friction body is rotated about the shaft portion. A friction tool having a structure in which the other end side of the friction body is extended from the case body to be a friction portion.
2. 2. The friction tool according to claim 1, wherein the tip of the friction body is formed in a pointed shape so that the friction portion of the friction body gradually becomes thinner toward the other end side.
3. The friction tool according to 1 or 2 above, wherein a notch is formed in the front wall and the back wall of the case body.
4). A circular through hole is formed in the front wall and the back wall on one end side of the case body, and a protrusion that matches the through hole is formed on the front surface portion and the back surface portion on the one end side of the friction body, The friction tool according to any one of claims 1 to 3, wherein the shaft portion is formed by fitting a protrusion of the friction body into a through hole of the case body.
5. 5. The friction tool according to item 4, wherein the protrusion of the friction body is exposed from the through hole of the case body, and the protrusion is rotated to rotate the friction body. Is.

  In the present invention, examples of the elastic material constituting the friction body include elastic resins (rubber and elastomer), such as silicone resin, SBS resin (styrene-butadiene-styrene copolymer), and SEBS resin (styrene-ethylene). -Butadiene-styrene copolymer), fluorine resin, chloroprene resin, nitrile resin, polyester resin, ethylene propylene diene rubber (EPDM) and the like. It is preferable that the elastic material constituting the friction body is not a highly wearable elastic material (for example, an eraser) but a low wear elastic material that does not generate a debris during friction.

  In the present invention, examples of the material constituting the case body include resins and metals. In particular, ABS resin (acrylonitrile-butadiene-styrene copolymer), PP resin (polypropylene), POM resin (polyoxymethylene), PC resin ( By selecting a material with good slipperiness such as polycarbonate), PS resin (polystyrene), PET resin (polyethylene terephthalate), etc., the friction body made of elastic material and the slidability of the case body are improved. Even if the front surface and the back surface of the case body are in contact with each other, it is easy to rotate, and the friction body can be easily taken in and out of the case body.

  The shape of the friction body may be a shape having a longitudinal direction in the direction of one end side and the other end side, such as a rectangular shape, an elliptical shape, an oval shape, or an egg shape in plan view. The shape of the case body may be a shape matched to the shape of the friction body or a different shape, but at least the other end side of the friction body that becomes the friction portion is covered with the case body so that the contamination of the friction portion can be prevented. It is important. Further, the connecting portion that connects the front wall and the back wall of the case body needs to be provided with an opening so that the friction body can be extended from the case body when the friction body is rotated about the shaft portion. More preferably, by providing the open part from the other end side of the case body to the one end side, the friction part of the friction body located on the other end side of the case body in the accommodated state is extended to the one end side of the case body. It is possible to rotate and make the entire friction tool long and easy to grip. Further, the connecting portion can be formed in a wall shape suspended from the outer edges of the front wall and the back wall, or can be formed in a column shape connecting the space between the front wall and the back wall. In addition, the shaft portion that pivotally supports the friction body on the case body is formed with a through hole or a recess formed on the inner surface of the case body, and a protrusion formed on the outer surface of the friction body is inserted, or conversely, on the inner surface of the case body. A protrusion may be formed and inserted into a through-hole or recess formed in the outer surface of the friction body, or another shaft member may be inserted into the case body and the friction body so as not to be detached. It is necessary for the friction body to be able to rotate about the shaft portion as a fulcrum without the portion fixing the case body and the friction body.

  In addition, by forming the friction part of the friction body into a pointed shape that gradually becomes thinner toward the other end side, the tip of the friction part becomes easy to see and the force concentrates on the tip, Friction may be facilitated. In this case, since a gap portion is formed between the outer surface of the friction body and the inner surface of the case body, the sliding resistance between the friction body and the case body is reduced, and the operability during rotation of the friction body is improved. The inclination angle of the pointed shape may be set as appropriate depending on the hardness of the material forming the friction body and the shape and dimensions of the friction part. However, if the tip becomes too thin, the friction part excessively deforms during friction and causes friction. Is difficult to do.

  In addition, when forming a notch on the front and back walls of the case body, a notch is provided at the same position on the front and back walls so that the friction body can be touched with a finger to facilitate gripping the friction body. It is preferable.

  Further, a circular through hole is formed in the front wall and the back wall on one end side of the case body, and a protrusion that matches the through hole is formed on the front surface and the back surface side on the one end side of the friction body. When the protrusion of the friction body is fitted into the through hole to form the shaft portion, it is possible to prevent the friction body from inadvertently rotating with respect to the case body due to the frictional resistance of the friction body. In addition, by providing a structure in which the protruding portion is formed large and closely fitted to the through hole, the holding body can be improved by suppressing the rotation of the friction body with respect to the case body. In this case, it is particularly important to form the elastic body with a low-abrasion elastic material so that the elastic body is not scraped by contact with the through hole.

  In addition, by exposing the protrusion of the friction body from the through hole of the case body and allowing the friction body to turn by rotating the protrusion, the friction body can be easily extended from the case body, and the friction body can be used during use. Since it is possible to grip and rub the protrusions of a finger with a finger, it is possible to apply a force directly to the friction part of the friction body, and when the friction is applied with force, the friction body is fed out from the case body. Can be prevented from rotating carelessly or from being damaged by an excessive load. The protrusion of the friction body needs to be sized so that a force can be applied by touching with a finger. Specifically, the diameter of the protrusion of the friction body and the through hole of the case body should be 20 mm or more. preferable.

  According to the friction tool of the present invention, it is possible to thermally discolor only the target portion in a wide area of the handwriting by the thermochromic ink on the paper surface, and it is possible to prevent the friction portion of the friction body from becoming dirty. .

FIG. 1 shows a friction tool in a state in which a friction body is accommodated in a case body. FIG. 2 is an exploded view of the friction tool. FIG. 3 is a view showing an assembled state of the friction tool. FIG. 4 is a view when the friction tool is put into use. FIG. 5 is a diagram showing a usage state of the friction tool.

  Embodiments of a friction tool 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.

  The structure of the friction tool of the present embodiment will be described with reference to FIGS. The friction tool 1 includes a friction body 2 and a case body 3, and the friction body 2 is formed in a flat shape in which the front surface portion 2a and the back surface portion 2b are close to each other, and the curvature of the one end portion 2c in plan view. The side surface portion 2e is formed in an egg shape whose radius is larger than the curvature radius on the other end portion 2d side, and a circular protrusion 2f and a protrusion 2g are formed on the front surface portion 2a and the back surface portion 2b on the one end portion 2c side. It is formed. The friction body 2 is formed so as to gradually become thinner toward the other end 2d side, and the friction portion 2h is formed in a pointed shape.

  Further, the case body 3 is formed in an egg shape in which the curvature radius of the one end portion 3c is larger than the curvature radius on the other end portion 3d side, similarly to the friction body 2, around the front wall 3a and the back wall 3b. The outer shape is formed larger than the outer shape of the friction body 2. The front wall 3a and the back wall 3b are connected by a connecting wall 3e suspended from the front wall 3a and the back wall 3b. The connecting wall 3e is connected to one end of the case body 3 from the other end 3d side. It is formed toward the 3c side, and the one end 3c side is open. Further, circular through holes 3f and 3g that match the protrusions 2f and 2g of the friction body 2 are provided on the one end 3c side of the case body 3, and the other end portions of the front wall 3a and the back wall 3b. On the opposite side of the connecting wall 3e on the 3d side, semicircular notches 3h and 3i are provided.

  FIG. 3 shows a state in which the friction tool 1 is assembled with the friction body 2 and the case body 3, and the other end 2 c side of the friction body 2 is positioned on the opposite side of the connecting wall 3 e of the case body 3. The state where it mounts | wears from the open part 3j side is shown. The case body 3 of the present embodiment is made of polypropylene resin, and the friction body 2 is made of polyester elastomer. In the assembled state, the front wall 3a and the back wall on the other end 2c side of the friction body 2 are used. Since 3b is formed in the dimension which touches the surface wall 3a and the back surface wall 3b of the case body 3, it is the protrusion 2f and 2g of the friction body 2, and the space | interval of the surface wall 3a of the case body 3 and the back surface wall 3b Install it so that it expands. Further, the protrusions 2f and 2g of the friction body 2 are formed with a diameter of 20 mm, and similarly, the through holes 3f and 3g of the case body 3 are formed with a diameter of 20 mm. The friction body 2 can be accommodated in the case body 3 as shown in FIG. In addition, since the protrusions 2f and 2g, which are elastic bodies, are tightly fitted to the through holes 3f and 3g, the friction body 2 is freely attached to the case body 3 due to vibration or impact when the friction tool 1 is carried. It can prevent rotating.

  Next, with reference to FIGS. 4 and 5, the movement when the friction tool 1 is put into use will be described. In the friction tool 1 of this embodiment, the friction body 2 in a state accommodated in the case body 3 (see FIG. 1) is rotated by rotating the protrusions 2f and 2g of the friction body 2 with fingers as shown in FIG. As shown in FIG. 5, the friction part 2 h of the friction body 2 can be extended from the case body 3. At this time, the friction body 2 is formed so that the front surface portion 2a and the back surface portion 2b gradually become thinner toward the other end portion 2d side, so that the friction body 2 protrudes toward the one end portion 2a side. Only the periphery of the portions 2f and 2g would be in contact with the inner surface of the case body 3, and the friction body 2 could be rotated with little resistance.

  As described above, the friction tool 1 of this embodiment can feed out the friction portion 2h on the other end 2d side by rotating the protrusions 2f and 2g, and the friction body 2 exposed from the notches 3h and 3i. The friction part 2h on the other end 2d side can also be fed out by picking and pulling the front surface part 2a and the back surface part 2b. Since the case body 3 is provided with the open portion 3j from the half position on the other end 3d side to the one end 3c side, the friction body 2 has the other end 2d on the one end 3c of the case body 3. As shown in FIG. 5, the entire length of the friction tool 1 can be lengthened so that it can be easily gripped. Further, since the protrusions 2f and 2g of the friction body 2 are formed with a diameter of 20 mm, the protrusions 2f and 2g can be picked by a finger, and when the paper surface is rubbed strongly, the protrusions of the friction body 2 A force can be directly applied to the friction part 2h in contact with the paper surface by picking 2f and 2g.

  In addition to rubbing thermochromic handwriting formed on the paper surface using the thermochromic ink, the friction tool of the present invention can also be used for rubbing the thermochromic ink that has been printed or painted on the paper surface or the like in advance. Can also be used.

1 ... friction tool,
2 ... friction body,
2a ... front surface portion, 2b ... back surface portion, 2c ... one end portion, 2d ... other end portion,
2e ... side face part, 2f ... projection part, 2g ... projection part, 2h ... friction part,
3 ... Case body,
3a ... front wall, 3b ... back wall,
3c ... one end, 3d ... the other end, 3e ... connecting wall,
3f ... through hole, 3g ... through hole, 3h ... notch, 3i ... notch,
3j: Open part.

Claims (5)

Friction of thermochromic handwriting formed on the paper surface using thermochromic ink, and the friction body made of elastic material that can thermally discolor the thermochromic handwriting by the frictional heat generated at that time is held in the case body The friction body is formed in a flat shape in which a front surface portion and a back surface portion are close to each other, and the case body is formed so that the front surface wall and the back surface wall are connected at a connection portion, A friction body is accommodated in the case body by pivotally supporting it with a shaft portion connecting one end side of the friction body and one end side of the case body, and rotating the friction body around the shaft portion. A friction tool having a structure in which the other end side of the friction body is fed out from the case body and used as a friction portion. The friction tool according to claim 1, wherein the tip of the friction body has a pointed shape so that the friction portion gradually becomes thinner toward the other end side. The friction tool according to claim 1 or 2, wherein a notch is formed in a front wall and a back wall of the case body. A circular through hole is formed in the front wall and the back wall on one end side of the case body, and a protrusion that matches the through hole is formed on the front surface portion and the back surface portion on the one end side of the friction body, The friction tool according to any one of claims 1 to 3, wherein the shaft portion is formed by fitting a protruding portion of the friction body into a through hole of the case body. The friction tool according to claim 4, wherein the protrusion of the friction body is exposed from the through hole of the case body, and the protrusion is rotated to rotate the friction body.

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