JP4238655B2 - Intrusive writing instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retractable writing instrument that causes a writing body to protrude and retract from a front end of a shaft cylinder by pressing a knock member provided at a rear portion of the shaft cylinder.
[0002]
[Prior art]
As an example, one side has an opening through which a writing part enters and exits, the other side extends from the other open end in the axial direction, a shaft cylinder in which a slit part having a locking part is formed, and ink is stored inside. An ink tank having a writing part on one side and a knock part on the other side, and an elastic body disposed between the shaft cylinder and the ink tank and biasing the ink tank toward the open end, When the base part of the clip part provided on the ink tank via the base part is inserted into the slit part and the knock part is pressed against the elastic body, the base part rotates in one direction and enters the locking part. There is a knock-type writing instrument that stops (see Patent Document 1).
[0003]
[Patent Document 1]
Utility Model Registration No. 2549135 (Claim 1 and FIGS. 2, 5, 6, and 8).
[0004]
[Problems to be solved by the invention]
By the way, in the said conventional structure, when it inserts in a pocket etc. from the time of factory shipment to display at a shop front, or when not in use, knock operation may be performed unintentionally. There was a risk of damaging the writing section and soiling clothes. The writing part protrudes due to a knocking operation caused by a collision between products during transportation or an unexpected knocking operation.
[0005]
[Means for Solving the Problems]
The present invention is a retractable writing instrument that causes a writing body to appear and retract from a front end of a shaft cylinder by pressing a knock member provided at a rear portion of the shaft cylinder, and the guide portion of the knock member is provided in the axial direction of the shaft cylinder In addition, a restriction groove is provided in the circumferential direction of the rear end portion above the guide portion, the knock member is locked in the restriction groove, and the forward movement of the knock member is restricted by the lock, and the writing is performed by the restriction. While preventing the body from projecting and forming a protrusion on the outer peripheral surface of the shaft cylinder, a protrusion is also formed on the lower surface of the knock member, and when the knock member is locked in the restriction groove, the shaft cylinder and the knock member The gist is that the protrusion can be engaged .
[0006]
[Action]
By placing the base portion on the restricting portion, an unexpected protrusion operation is prevented.
[0007]
【Example】
An example of the present invention will be described with reference to FIGS. FIG. 1 is a partial longitudinal sectional view showing a state in which the cursive body 2 is housed. A seal cylinder portion 3 is locked and set to the shaft cylinder 1 through a resilient member 7 so as not to move. On the rear inner surface of the seal tube portion 3, an inner rib is formed on the circumference for maintaining a seal with the outer wall in front of the writing body 2 formed of a resin material. In addition, three fine wire portions 5 are integrally formed in the seal lid 4 at radial positions at equal intervals (120 degree intervals). The rear end of the thin wire portion 5 is fixed to the guide tube 6, and the sealing lid 4 is pressed backward by the urging force of the elastic member 7, so that the sealing lid 4 and the sealing tube portion 3 are kept sealed. .
The front end portion of the shaft cylinder 1 is provided with a front end opening hole through which the front end of the writing body 2 can slide so that the rear end can be slid and the rear end can be slidably disposed on the rear member (knock member) 2b forming the writing body 2. An end opening hole is provided. Further, a guide groove 1a is formed on the side surface of the shaft tube 1 so that the sliding piece 9 can slide in the longitudinal direction and a locking portion 1b is formed in the distal direction. The rear of the guide groove 1 a is not connected to the rear end opening of the shaft cylinder 1, and the guide groove 1 a forms a window portion closed on the side surface of the shaft cylinder 1. That is, the front end and the rear end (rear end portion 1c) of the guide groove 1a are closed. Further, the rear end portion 1 c of the guide groove 1 a can also be a locking portion of the sliding piece 9 when the writing body 2 is accommodated in the shaft tube 1.
[0008]
Further, a regulation groove 1i is formed in the circumferential direction from the rear end 1c of the guide groove 1a. When the product is shipped from the factory or not in use, the sliding piece 9 is rotated in the circumferential direction of the shaft cylinder 1 and the base portion 9b is positioned in the restriction groove 1i. At this time, the sliding piece 9 and the shaft tube 1 can be engaged so that the sliding piece 9 (base portion 9b) does not easily return. Specifically, the protrusion 9h provided on the lower surface of the sliding piece 9 is engaged with the protrusion 1k provided on the outer peripheral surface of the shaft cylinder 1 (see FIGS. 5 and 6). In this example, the base 9b (sliding piece 9) and the rear member (knock member) 2b are formed as separate members, and are engaged and fixed to each other, but means such as injection molding or cutting May be integrally formed.
Here, on the bottom surface of the restriction groove 1i, an inclined surface portion 1l that is inclined toward the protruding direction of the writing body 2 is formed. When an excessive protrusion operation is performed in a state where the base portion 9b is positioned in the restriction groove 1i, the base portion 9b can be advanced through the inclined surface portion 1l. That is, the control groove 1i and the base 9b are prevented from being damaged in an unexpected and excessive projecting operation. By the way, in this example, when a protruding operation force of about 3.0 kg to 5.0 kg is applied, the base portion 9b passes through the inclined surface 11 and is separated from the restriction groove 1i to reach the guide groove 1a. .
A projection 1j is formed on the rear end 1c of the guide groove 1a downward so that a concave inclined portion 9e of a base 9b described later can be engaged. That is, in use, the sliding piece 9 is prevented from rotating carelessly with respect to the shaft tube 1.
[0009]
Next, the seal cylinder part 3 will be described in detail. A seal part 3 a having a semicircular cross section is formed in an annular shape behind the inner surface of the seal cylinder part 3. The seal portion 3a is formed in two upper and lower stages, and is a portion that slides fluidly with the front member 2a of the writing body 2. That is, although it is a part which interrupts | blocks the inner space part 3b and the outer side of the seal | sticker cylinder part 3, it can slide relatively. Specifically, since the seal tube portion 3 is fixed to the shaft tube 1, the writing body 2 (front member 2 a) slides with respect to the seal tube portion 3. Further, the inner space portion 3 b has an inner diameter that is substantially the same as the outer diameter of the writing portion 10 of the writing body 2. By making the inner space portion 3b as small as possible, the drying of the writing unit 10 prevents the ink from the writing unit 10 from drying.
[0010]
The sliding piece 9 includes a button portion 9a on the outer side of the shaft tube 1, a base portion 9b that slides and locks in the guide groove 1a, and an inner portion 9c that holds the writing body 2 on the inner side of the shaft tube 1. . In FIG. 1, the rear part of the base part 9b of the sliding piece 9 is disposed in contact with the rear end part 1c of the guide groove 1a or with a slight gap.
FIG. 2 is a partial longitudinal sectional view showing a state in which the writing body 2 protrudes (writing state). The concave inclined portion 9e formed on the rear side of the base portion 9b of the sliding piece 9 is locked to the acute locking portion (protrusion) 1b of the shaft tube 1 so that the writing state can be maintained. In this state, by appropriately rotating the button portion 9a of the sliding piece 9 about the longitudinal axis, the locking of the base portion 9b of the sliding piece 9 and the guide groove locking portion 1b is released, and the cursive body 2 is stored. Can move on.
[0011]
FIG. 3 is a transverse cross-sectional view of FIG. 1, in which an inner portion 9 c of the sliding piece 9 holds the writing body 2, and the sliding piece 9 is disposed so as to be rotatable about a substantially longitudinal axis. More specifically, the cursive body front member 2a and the cursive body rear member 2b are detachably connected and fixed by screwing, and the inner portion 9c of the sliding piece 9 is loosely attached to the screwed portion. Has been. That is, the inner part 9c is integrated with the cursive body 2 in a state of being sandwiched between the cursive body front member 2a and the cursive body rear member 2b. Moreover, the said cursive front member 2a and the cursive back member 2b are connected by screwing, and the front part of the screwing structure is an airtight structure. Specifically, the circumferential rib formed on the inner surface of the cursive front member 2a is in contact with the flat surface portion 2f formed on the cursive back member 2b, and the airtight structure is in contact with each other by pressure contact and deformation. It has become. As a result, the ink of the ink occlusion body, which will be described later, does not evaporate from the airtight structure part or has a screwed structure that is extremely difficult to evaporate.
[0012]
In addition, an ink occlusion body made of a fiber bundling body is inserted in the cursive front member 2a and the cursive front member 2b connected by the airtight structure, but porous materials such as sponge, urethane, cotton, etc. It may be the body. And the coating body which consists of a thin film-like member is wound around the surface of the ink occlusion body which consists of the said fiber bundling body, You may form several fine through-holes in the coating body.
FIG. 7 is an exploded perspective view of main components. The inner portion 9c of the sliding piece 9 is rotatably disposed on a reduced diameter portion (in the present embodiment, the rear member 2b side) 2c formed by the front member 2a and the rear member 2b, which is fitted to the writing body 2. ing. Reference numeral 2 d is a locking rib formed on the cursive front member 2 a, and the locking rib 2 d is engaged with the guide cylinder 6. That is, the cursive front member 2a and the guide cylinder 6 are relatively incapable of rotating.
[0013]
【The invention's effect】
The present invention is a retractable writing instrument that causes a writing body to appear and retract from a front end of a shaft cylinder by pressing a knock member provided at a rear portion of the shaft cylinder, and the guide portion of the knock member is provided in the axial direction of the shaft cylinder In addition, a restriction groove is provided in the circumferential direction of the rear end portion above the guide portion, the knock member is locked in the restriction groove, and the forward movement of the knock member is restricted by the lock, and the writing is performed by the restriction. While preventing the body from projecting and forming a protrusion on the outer peripheral surface of the shaft cylinder, a protrusion is also formed on the lower surface of the knock member, and when the knock member is locked in the restriction groove, the shaft cylinder and the knock member Since the protrusion can be engaged , an accidental knocking operation can be prevented.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part showing an example of the present invention (cursed body storage state).
FIG. 2 is a longitudinal sectional view of an essential part showing an example of the present invention (cursor projecting state).
FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is an enlarged view of a main part of FIG.
FIG. 5 is a cross-sectional view showing a state in which a base is engaged with a restriction groove.
6 is a front view of FIG. 5. FIG.
FIG. 7 is an exploded perspective view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft cylinder 1a Guide groove 1b Engagement part 1c Rear end part 1e Wide part 1f Chamfer 1g Engagement hole 1h Engagement hole 1i Restriction groove 1j Protrusion 1k Protrusion 1l Inclined surface part 2 Writing body 2a Writing body front member 2b Writing body back Member 2c Reduced diameter portion 2d Locking rib 2f Flat portion 3 Seal tube portion 4 Seal lid 5 Thin diameter portion 6 Guide tube 7 Repellent member 8 Clip 9 Slide piece 9a Button portion 9b Base portion 9c Inner portion 9e Inclined portion 9g Chamfer Part 9h protrusion

Claims (3)

A retractable writing instrument that causes a writing body to protrude and retract from a front end of a shaft cylinder by pressing a knock member provided at a rear portion of the shaft cylinder, wherein the guide portion of the knock member is provided in the axial direction of the shaft cylinder and the guide A restriction groove is provided in the circumferential direction of the rear end portion above the portion, the knock member is locked in the restriction groove, and the forward movement of the knock member is restricted by the lock, and the protruding action of the writing body is restricted by the restriction. In addition to forming a protrusion on the outer peripheral surface of the shaft cylinder, a protrusion is also formed on the lower surface of the knock member. When the knock member is locked in the restriction groove, the protrusion of the shaft cylinder and the knock member are engaged. A haunting type writing instrument characterized by being able to do it.   The retractable writing instrument according to claim 1, wherein the restriction groove is inclined toward the protruding direction of the writing body.   The guide part and the regulation groove are provided continuously on the side wall of the shaft tube, and the guide part and a protrusion that fits into the regulation groove are provided on the knock member. Item 3. An intrusive writing instrument according to item 2.

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