JP2010125754A - Writing instrument holder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing instrument holder that can be easily and simply attached to a writing instrument with one operation, that can widen the area relative to the diameter of the axial body of a corresponding pencil, and that can effectively prevent the writing instrument from falling off after the holder is attached. <P>SOLUTION: The holder includes: a holder barrel 4 composed of a fingertip picking cylinder 2 that is open in the front end 2a and that has at least one notched part 8 opening toward the front outside in the axial direction and of an auxiliary cylinder 3 that extends from the fingertip picking cylinder 2 to the rear part in the axial direction; and an exterior barrel 5 provided with an elastic function in a diameter contracting direction. The exterior barrel 5 is externally fitted with pressure onto the fingertip picking cylinder 2 in the holder barrel 4. As a result, by the elastic function of the exterior barrel, the fingertip picking cylinder 2 is contracted in diameter, clamping the axial body of the writing instrument P that is inserted into the fingertip picking cylinder 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a writing instrument holder that is used with a shaft of a writing instrument such as a pencil.

  The writing instrument holder is composed of an axially front fingertip picking cylinder part whose front end is open and an auxiliary cylinder part extending axially rearward from the fingertip picking cylinder part, and the front end opening part in the fingertip picking cylinder part. By sandwiching the shaft body of the pencil interpolated from the pencil, the pencil whose shaft body is shortened can be used effectively.

  Conventionally, in order to attach a shortened pencil shaft to the holder, it is simply inserted in the press-fit state from the front end opening of the fingertip gripping cylinder part, or directed outward in the axial direction of the fingertip gripping cylinder part. Provide at least one notch to be opened, insert a diaphragm ring on the outer peripheral surface of the fingertip knob cylinder section, and slide the diaphragm ring toward the front in the axial direction to reduce the diameter of the fingertip knob cylinder section. Or, as described in Patent Document 1, screw the fastening ring onto the outer peripheral surface of the fingertip picking tube portion, and screw this fastening ring into the fingertip picking tube portion. By reducing the diameter in the direction of diameter reduction, the shaft body of the pencil is held.

However, the conventional writing instrument holder described above is a one-time operation (hereinafter referred to as "the pencil shaft body") in which the pencil shaft body is simply inserted from the front end opening of the fingertip gripping cylinder portion when the pencil shaft body is mounted. It can be easily and easily mounted by one-touch operation), but the change width in the radial direction of the fingertip picking cylinder is small, and the range of correspondence to the diameter of the pencil shaft is not only narrow, but it can be used repeatedly. As a result, the elastic pinching force of the fingertip gripping cylinder portion is weakened, and the pencil is easy to come off.
In addition, if the shaft of a pencil is inserted and then the aperture ring is slid or clamped so as to be screwed in, it requires two operations, so it can be mounted with a one-touch operation. Can not.
JP-A-9-52493

  In view of the above-mentioned present situation, the present invention can be easily and easily mounted by a one-touch operation, can widen the corresponding range with respect to the diameter of the shaft of the pencil, and effectively removes the writing instrument after mounting. An object of the present invention is to provide a writing instrument holder that can be prevented.

  The above-described problems are solved by the invention having the following configuration, as described in each claim in the section “Claims”.

(1) A fingertip knob cylinder portion having an opening at the front end and provided with at least one cut portion that opens toward the front outer side in the axial direction, and an auxiliary cylinder portion extending axially rearward from the fingertip knob cylinder portion And the outer cylindrical body having an elastic function in the direction of diameter reduction. The outer cylindrical body is externally fitted in a press-fit state to the fingertip gripping cylindrical portion of the holder cylindrical body. The diameter of the fingertip knob cylinder is reduced by the elastic function of the cylinder so that the shaft of the writing instrument inserted in the fingertip knob cylinder can be held.

(2) In the above item (1), the outer cylindrical body is formed of an elastic material so as to have an elastic function in the reduced diameter direction.

(3) In the above item (2), the exterior cylinder is provided with one cut portion over the entire length in the axial direction.

(4) In any one of the above items (1) to (3), a circumferential annular groove is formed on the outer peripheral surface of the fingertip gripping cylinder portion of the holder cylinder, and the exterior cylinder is fitted on the annular groove. .

(5) In any one of the above items (1) to (4), the inner peripheral surface of the open end portion of the fingertip knob cylinder portion is chamfered to an inclined surface that expands outward in the axial direction.

(6) In any one of the above items (1) to (5), the buffer cylinder is externally fitted to the outer peripheral surface of the exterior cylinder.

According to the present invention, the following effects can be achieved.
According to the invention of claim 1, by externally fitting an outer cylinder having an elastic function in the reduced diameter direction to the fingertip knob cylinder portion in the holder cylinder with a press-fit state, the elastic function of the outer cylinder Since the diameter of the fingertip knob cylinder is reduced so that the shaft of the writing instrument inserted into the fingertip knob cylinder can be clamped, the writing instrument can be easily and easily operated by just inserting it into the fingertip knob cylinder. Easy to install.
In addition, since the fingertip knob cylinder is elastically reduced in the diameter reduction direction with the outer cylinder, the diameter of the fingertip knob cylinder is reduced according to the diameter of the shaft of the writing instrument. It is possible to easily expand the diameter against the elastic action of the direction, and to increase the variation width in the radial direction of the fingertip picking cylinder portion, thereby widening the corresponding range for the diameter of the corresponding writing instrument. be able to.
Furthermore, since the outer cylinder is fitted on the outer peripheral surface of the fingertip knob cylinder portion with a press-fit state, the shaft body of the writing instrument inserted in the fingertip knob cylinder portion with the clamping force due to the elastic function of the outer cylinder body is provided. It can always be pinched and can effectively prevent the writing instrument from falling off after being mounted.

  According to the second aspect of the present invention, since the outer cylindrical body is formed of an elastic material, the elastic function in the reduced diameter direction is provided, so that the elastic action in the reduced diameter direction is easily imparted to the fingertip knob cylinder portion. can do.

  According to the third aspect of the present invention, since the cutout portion is provided over the entire length in the axial direction in the outer cylinder, the outer cylinder can be easily expanded in the radial direction, and the holder cylinder The body can be easily fitted onto the fingertip picking tube.

  According to the fourth aspect of the present invention, since the circumferential annular groove is formed on the outer peripheral surface of the fingertip picking cylinder portion of the holder cylinder, and the outer cylinder is externally fitted in the annular groove, the elasticity after mounting is provided. The position stability of the outer cylinder can be improved, and the pinching force due to the elastic action of the outer cylinder can always be applied to the shaft of the writing instrument inserted in the fingertip knob cylinder.

  According to the fifth aspect of the present invention, since the inner peripheral surface of the opening end portion of the fingertip gripping cylinder portion is chamfered to the inclined surface that expands toward the outside in the axial direction, the writing instrument can be more easily inserted. Can be done.

  According to the invention described in claim 6, since the buffer cylinder is externally fitted to the outer peripheral surface of the exterior cylinder, the cushion effect of the fingertip knob can be further enhanced, and the occurrence of pen wrinkles is effectively prevented. can do.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a writing state in which a pencil is attached to the writing instrument holder of the first embodiment of the present invention, and FIG. 3 is an enlarged perspective view of the writing instrument holder, FIG. 4 is an enlarged vertical sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is an exploded perspective view of the writing instrument holder.

  As shown in FIG. 1, the writing instrument holder 1 of the present invention is made of metal, hard plastics, or the like, and has a front end 2a that is open and an axially forward portion in which a pencil P with a short shaft is inserted. The fingertip knob cylinder 2 and the auxiliary cylinder 3 that extends integrally from the fingertip knob cylinder 2 toward the rear in the axial direction, and whose rear end is closed or opened (in the illustrated embodiment, a closed state is shown). And the outer cylinder 5 that is externally fitted in a press-fit state on the outer peripheral surface of the fingertip knob cylinder portion 2 of the holder cylinder 4.

  The fingertip gripping cylinder portion 2 is a portion that is mainly gripped by the fingertips of the thumb, index finger, and middle finger in a state where the holder 1 on which the pencil P is mounted is gripped with a finger during writing.

As shown in FIGS. 2 to 5, the outer cylinder 5 is made of an elastic material such as metal or hard plastics, and has a slit-shaped cut portion 6 extending over the entire length in the axial direction. .
Due to the formation of the cut portion 6, when an internal force is applied to the exterior cylinder 5 in the radial direction, it is counteracted in the radial direction against the internal force by elastic deformation due to expansion of the circumferential cut width in the cut portion 6. Power is generated.
Thereby, when the exterior cylinder 5 is externally fitted to the outer peripheral surface of the fingertip knob cylinder 2 in the holder cylinder 4 with a press-fitting state, the fingertip knob cylinder is caused by the elastic function of the outer diameter of the exterior cylinder. 2 is reduced in diameter.

On the outer peripheral surface of the fingertip gripping cylinder portion 2, an annular groove 7 that is recessed in the circumferential direction while leaving a part of the outer peripheral surface 2 b on the front end 2 a side, is opened toward the front outer side in the axial direction, and in the circumferential direction. A plurality of slit-like cut portions 8 cut at a desired interval are formed.
When the external force or the internal force is applied to the fingertip gripping cylinder portion 2 in the radial direction by the formation of the cut portion 8, the external force or the internal force is caused by elastic deformation due to the reduction or expansion of the circumferential cut width in the cut portion 8. A reaction force is generated in the radial direction against this.

The outer cylinder 5 is externally fitted in an annular groove 7 formed in the fingertip knob cylinder portion 2 with a press-fit state, and the outer peripheral surface 5 a is an outer peripheral surface 2 b of the fingertip knob cylinder portion 2 and the auxiliary cylinder portion 3. It is located on the same plane as the outer peripheral surface 3a.
Thereby, there is no level difference on the outer peripheral surface of the holder cylinder 4, the appearance can be improved, and there is no sense of incongruity at the time of picking, and stable writing can be performed.

The inner diameter of the fingertip knob cylinder 2 is substantially the same as the outer diameter of the shaft body of the pencil P, and the inner diameter of the outer cylinder 5 is smaller than the outer diameter of the fingertip knob cylinder 2. When the outer diameter of the annular groove 7 is made larger than the inner diameter of the outer cylinder 5, the outer cylinder 5 is fitted into the outer circumferential surface of the fingertip picking cylinder portion 2, that is, the annular groove 7 in a press-fit state. In addition, the outer cylinder 5 exerts an elastic action in the radial direction, thereby acting as an external force on the fingertip knob cylinder 2 of the holder cylinder 4 in the reduced diameter direction.
Thereby, when the shaft body of the pencil P is inserted into the fingertip knob cylinder portion 2, the elastic deformation in the expanding direction in the cut width of the notch portion 8 due to the internal force in the diameter increasing direction generated in the fingertip knob cylinder portion 2. Against this, it is possible to effectively impart elasticity in the direction of diameter reduction to the fingertip gripping cylinder portion 2 and to elastically hold the shaft body of the pencil P.
In addition, the positional stability of the exterior cylinder 5 after mounting becomes good, and the pinching force due to the elastic action of the exterior cylinder 5 is always applied to the shaft body of the pencil P inserted in the fingertip knob cylinder. It is possible to effectively prevent the pencil P from falling off.

In this case, the inner diameter of the fingertip gripping cylinder portion 2 is set to be substantially the same as the outer diameter of the shaft body of the pencil P, but is larger than the outer diameter of the shaft body of the pencil P, The inner diameter of the fingertip knob cylinder 2 may be made smaller than the outer diameter of the pencil P shaft.

The inner peripheral surface in the vicinity of the front end 2a of the fingertip gripping cylinder portion 2 is formed by chamfering an inclined surface 9 that expands toward the front outer side in the axial direction.
Thereby, insertion of the shaft body of the pencil P at the time of mounting | wearing can be performed still more easily.

  FIG. 6 is a longitudinal sectional view showing the writing instrument holder according to the second embodiment of the present invention.

  In the present embodiment, in the writing instrument holder 1 in the first embodiment, the outer peripheral surface 5a of the outer cylinder 5 that is externally fitted in the annular groove 7 on the outer peripheral surface of the fingertip knob cylinder portion 2 in the holder cylinder 4 is further provided. While externally fitting the buffer cylinder 10 such as rubber, the outer peripheral surface 10a of the buffer cylinder 10 is adjusted by adjusting the depth of the annular groove 7, so that each of the fingertip knob cylinder section 2 and the auxiliary cylinder section 3 is adjusted. It has the structure formed on the same plane as the outer peripheral surfaces 2b and 3a.

It is a perspective view which shows the writing state which mounted | wore the pencil for writing instrument holder of 1st Embodiment in this invention with the pencil. It is an expansion perspective view of a writing instrument holder. Similarly, it is a longitudinal cross-sectional view of a writing instrument holder. FIG. 4 is an enlarged vertical sectional view taken along line IV-IV in FIG. 3. It is a disassembled perspective view of the holder for writing instruments. It is a longitudinal cross-sectional view of the holder for writing instruments of 2nd Embodiment in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Writing instrument holder 2 Fingertip picking cylinder part 2a Front end 2b Outer peripheral surface 3 Auxiliary cylinder part 3a Outer peripheral surface 4 Holder cylindrical body 5 Outer cylindrical body 5a Outer peripheral surface 6 Notch 7 Annular groove 8 Notch 9 Inclined surface 10 Buffer cylinder 10a Outer periphery Surface P Pencil (writing instrument)

Claims (6)

The front end is open and includes a fingertip knob cylinder portion provided with at least one notch portion that opens toward the front outer side in the axial direction, and an auxiliary cylinder portion that extends axially rearward from the fingertip knob cylinder portion. It consists of a holder cylinder and an exterior cylinder with an elastic function in the direction of diameter reduction
By externally fitting the outer cylinder in a press-fit state to the fingertip knob cylinder in the holder cylinder, the fingertip knob cylinder is reduced in diameter by the elastic function of the outer cylinder, so that the inner diameter of the fingertip knob cylinder is reduced. A holder for a writing instrument, characterized by being able to clamp the shaft of the writing instrument to be inserted.   The writing instrument holder according to claim 1, wherein the outer cylindrical body is formed of an elastic material so as to have an elastic function in a diameter reducing direction.   The writing instrument holder according to claim 1 or 2, wherein the outer cylindrical body is provided with one incision portion over the entire length in the axial direction.   The holder for writing instruments in any one of Claims 1-3 which formed the annular groove | channel of the circumferential direction in the outer peripheral surface of the fingertip picking cylinder part of a holder cylinder body, and made the exterior cylinder body fit in this annular groove.   The holder for a writing instrument according to any one of claims 1 to 4, wherein the inner peripheral surface of the opening end portion of the fingertip gripping cylinder portion is chamfered to an inclined surface that expands outward in the axial direction.   The holder for a writing instrument according to any one of claims 1 to 5, wherein a buffer cylinder is fitted on the outer peripheral surface of the outer cylinder.

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