JP6908409B2 - fountain pen - Google Patents

Description

The present invention relates to a fountain pen having a structure in which a cursive is housed inside the barrel and the front of the barrel is sealed with a lid that can be opened and closed.

Conventionally, a fountain pen having a structure that prevents ink from drying and dust from entering by providing a lid in front of the barrel has been known, and the fountain pen can be operated by operating an operating body provided on the barrel. A fountain pen having a structure in which the cursive pen in the barrel is moved forward to push open the lid with the pen tip and the pen tip is projected from the barrel is described in Patent Document 1 (Japanese Patent Publication No. 58-39889) and Patent Document 2. (Japanese Unexamined Patent Publication No. 2007-118347).

Jikkai Sho 58-39889 Japanese Unexamined Patent Publication No. 2007-118347

However, the fountain pens found in Patent Documents 1 and 2 have a structure in which a hard pen point provided at the tip of the pen in order to prevent wear is in sliding contact with the lid to open and close the lid. When the writing body moves forward, the pen point slides against the back surface of the lid body and a force that wears the back surface of the lid body works, and when the writing body moves backward, the pen is attached to the front end of the lid body. Sometimes the points touch.
If the back surface of the lid is scraped by the sliding contact of the hard pen point, the airtightness of the lid may deteriorate, and the pen point may get caught on the lid when the cursive retracts. If this happens, there is a risk that the operation will not be smooth.

An object of the present invention is to obtain a fountain pen with an opening / closing lid having a structure in which the pen point does not slide against the lid.

The present invention
"A cursive that has a pen tip with a pen and a pen core overlapped inside the barrel is accommodated so that it can move back and forth, and the elastic force of the elastic member arranged in the barrel allows the barrel to move. A fountain pen having a lid that closes the front part of the cursive pen and has a structure that pushes and opens the lid body at the front part of the cursive by operating an operation unit provided on the barrel.
The lid is a metal plate formed of stainless steel, and a protruding portion that the pen core comes into contact with when the writing body advances is integrally provided on the back surface of the lid by press molding. A rear inclined surface and a front inclined surface with which the pen core is in sliding contact are provided in the rear and front of the protruding portion, a hollow pipe is attached to the front portion of the barrel, and the front of the hollow pipe has elasticity and is front and rear. An elastic tip that opens is attached, a presser spring made of a torsion coil spring is used as the elastic member, the first arm of the presser spring is locked to the locking portion of the lid, and the coil portion of the presser spring is engaged. A shaft rod fixed to the hollow pipe together with a support portion of the lid body is axially attached, the second arm of the holding spring is abutted against the side surface of the hollow pipe, and the holding spring repels the lid body. The pen is characterized in that the lid is brought into close contact with the inclined front end surface of the elastic tip to seal the barrel. ".

The protruding portion provided on the back side of the lid may be formed so that the pen point does not slide in contact with the lid by sliding the protruding portion and the pen core when the cursive moves forward. Although the material is not limited, a highly airtight lid can be obtained with a simple structure by press-molding a metal plate-shaped lid to integrally form a protruding portion.

According to the present invention, it is possible to obtain a fountain pen with an opening / closing lid having a structure in which the pen point does not slide against the lid.

FIG. 1 is a vertical cross-sectional view showing a fountain pen of this embodiment. FIG. 2 is an enlarged view of a main part. FIG. 3 is a view of the inside of FIG. 2 as viewed from the front. FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a front sectional view showing a state in which the pen tip is immersed. FIG. 6 is a rear sectional view in a state where the pen tip is immersed. FIG. 7 is a rear sectional view in a state where the pen tip is projected. FIG. 8 is a front sectional view showing a first state in which the pen tip protrudes. FIG. 9 is a front sectional view showing a second state in which the pen tip protrudes. FIG. 10 is a front sectional view showing a third state in which the pen tip protrudes. FIG. 11 is a front sectional view showing a state in which the pen tip is projected.

Next, the fountain pen of this embodiment will be described with reference to the figure.
In this embodiment, the side with the pen tip is expressed as the front and the opposite side is expressed as the rear.
FIG. 1 is a vertical cross-sectional view showing a fountain pen of this embodiment, and FIG. 2 is an enlarged view of a main part. FIG. 3 is a front view of the inside of FIG. 2, and FIG. 4 is a cross-sectional view taken along the line AA of FIG. FIG. 5 is a front sectional view in a state where the pen tip is immersed, and FIG. 6 is a rear sectional view in a state where the pen tip is immersed.

The fountain pen 1 has a cursive body 5 arranged at the rear portion of a barrel 4 in which a front shaft 2 and a rear shaft 3 are screwed together, and a cursive body 8 having an ink tank 7 behind the pen tip 6 is housed inside. is doing.
A tip cover 9 having a tip opening 9a is fixedly fixed to the front portion of the front shaft 2 and integrated.
Further, a hollow pipe 10 is attached to the front portion of the front shaft 2 inside the tip cover 9, and an elastic front neck 11 having elasticity and opening in the front and rear is attached to the front of the hollow pipe 10 to be elastic. The front end inclined surface 11a of the front neck 11 is sealed by a lid body 13 elasticized by a holding spring 12.
The cursive 8 is repelled backward by a spring 14 arranged inside the front shaft 2. The spring 14 is arranged between the outer stage 8a of the cursive 8 and the inner stage 2a of the front shaft 2.

As shown in the figure, the fountain pen 1 of this embodiment uses a torsion coil spring as the pressing spring 12. In the pressing spring 12, the first arm 12a is locked to the locking portion 13a of the lid body 13, and the coil portion 12b is attached to the shaft by the shaft rod 15 fixed to the hollow pipe 10 together with the support portion 13b of the lid body 13. The second arm 12c is brought into contact with the side surface of the hollow pipe 10.

The knock body 5 protruding from the rear end opening 3a of the rear shaft 3 has a knock cover 16 made of a bottomed thin metal material adhered to a knock member 17 made of a tubular resin material having both ends open. .. Further, inside the knock member 17, a slider 18 in contact with the rear end of the writing body 8 is slidably arranged, and a spring 19 is arranged between the slider 18 and the knock member 17. Both are elastic in the direction of separation. The slider 18 has a convex portion 18a formed at the rear end thereof and a convex portion 17a formed on the inner surface of the knock member 17 so as to come into contact with the slider 18.

Further, in the knock member 17, the first large diameter portion 17b is formed at the front end portion, and the second large diameter portion 17c is provided at a position inside the rear shaft 3 with the knock body 5 arranged on the axle cylinder 4. A thin third large diameter portion 17d is formed at the rear end portion. As shown in the figure, the knock member 17 and the knock cover 16 are press-fitted into the inner surface 16a of the knock cover 16 so that the second large diameter portion 17c and the third large diameter portion 17d of the knock member 17 are in close contact with each other. The first large diameter portion 17b of the knock member 17 protrudes from the front end of the knock cover 16 with the knock cover 16 attached. Further, a circumferential groove portion 17e is provided on the outer surface of the first large diameter portion 17b of the knock member 17, and an O-ring 20 is fitted in the groove portion 17e. As shown in the figure, the knock body 5 retracts due to the elastic force of the slider 18 and the spring 19 that come into contact with the cursive body 8 repelled by the spring 14, and the O-ring 20 comes into close contact with the rear inner surface 4a of the rear shaft 4. It is in a state of being.

FIG. 7 is an enlarged rear view when the knock body is knocked. As shown in the figure, by pressing the knock body 5 at the rear part of the barrel 4 forward, a rotary cam mechanism (not shown) arranged in the barrel is activated, although not described in detail, to act as a cursive. While the pen tip 6 of 8 moves forward, the lid 13 is opened by rotating the shaft rod 15 around the axis (see FIG. 11).

Explaining the front part of the fountain pen at the time of the operation with reference to FIG. 11, the lid 13 that sealed the front end inclined surface 11a of the elastic tip 11 is opened by the forward movement of the pen tip 6 of the cursive body 8, and the tip is opened. The pen tip 6 projects from the tip opening 9a of the cover 9. At this time, the spring 14 is compressed between the protrusion 2a formed on the inner surface of the front shaft 2 and the step portion 8a of the cursive body 8.

By knocking the knock body 5 again, the pen tip 6 is immersed in the tip opening 9a, and the elastic force of the pressing spring 12 causes the lid body 13 to come into close contact with the inclined front end surface 11a of the elastic tip 11 made of nitrile rubber. Seal the barrel (see FIGS. 2 and 5).

The pen tip 6 of this embodiment is composed of a pen 61 and a pen core 62, and a pen point 61a formed of an osmium-based alloy having a Vickers hardness of 700 HV is provided at the tip of the pen 61 to withstand wear. Is improving. Further, the back surface 13c of the lid 13 is provided with a protruding portion 13d with which the pen core 62 comes into contact when the cursive 8 advances, and when the cursive 8 advances, the pen point 61a is the lid 13. The pen tip 6 can be projected from the tip opening 21a without sliding contact with the back surface 13c of the pen tip 6.
The protrusion 13d of this embodiment is formed by integrally molding a plate-shaped lid 13 formed of stainless steel having a Vickers hardness of 200 HV by press molding, and the pen core 62 is in sliding contact with the rear and front of the protrusion 13d. A rear inclined surface 13e and a front inclined surface 13f are provided for ease of use.

Specifically, the process from the immersive state to the protruding state of the pen tip 6 will be described with reference to FIGS. 5 and 8 to 11. As shown in FIG. 5, the pen tip 6 is completely the shaft cylinder 4. In the state of being immersed inside (the state in which the knock body 5 is in the state of FIG. 6), the pen 61 and the pen core 62 of the pen tip 6 are in a state of being separated from the back surface 13c of the lid body 13, and by advancing the knock body 5. , The pen tip 6 gradually advances, the pen tip shown in FIG. 8 is in the first state of protruding, the pen tip shown in FIG. 9 is in the second state of protruding, and the pen shown in FIG. 10 is in the second state. The third state is in which the tip is projected, and the pen tip in FIG. 11 is in a protruding state (the knock body 5 is in the state shown in FIG. 7).

Further explaining the process in detail, in FIG. 8, the protruding portion 13d of the lid 13 is in contact with the front portion 62a of the pen core 62, and in FIG. 9, the protruding portion 13d and the back surface 13c of the lid 13 are in contact with the pen core 62. In FIG. 10, the folded-back portion 13g formed at the front end portion of the lid 13 is in contact with the front portion of the pen core 62, and in FIG. 11, the front end portion of the lid 13 is in contact. 13 g of the folded-back portion formed in the pen core 62 is in contact with the intermediate portion of the pen core 62.

As described above, when the pen tip 6 advances and protrudes, it advances in the order of FIGS. 5, 8, 9, and 10, but the pen point 61a is in sliding contact with the back surface 13c of the lid 13. Therefore, the back surface 13c of the lid body 13 is not scraped off, and the airtightness between the lid body 13 and the elastic tip 11 is not deteriorated.
Further, when the protruding pen tip 6 retracts and immerses, it retracts in the order of FIGS. 10, 9, 8 and 5, but since the pen point 61a does not touch the lid body 13, the pen is retracted. Since the point 61a is caught on the lid body 13, the operation does not become unsmooth.

1 ... Fountain pen,
2 ... front axle, 2a ... inner stage,
3 ... Rear axle, 3a ... Rear end opening,
4 ... Axle cylinder, 4a ... Rear inner surface,
5 ... Knock body,
6 ... Pen tip, 61 ... Pen, 61a ... Pen point, 62 ... Pen core, 62a ... Front part,
7 ... Ink tank,
8 ... cursive, 8a ... outer,
9 ... Tip cover, 9a ... Tip opening,
10 ... Hollow pipe,
11 ... Elastic tip, 11a ... Front end inclined surface,
12 ... Holding spring, 12a ... First arm, 12b ... Coil part, 12c ... Second arm,
13 ... lid, 13a ... locking part, 13b ... support part, 13c ... back surface, 13d ... protruding part, 13e ... rear inclined surface, 13f ... front inclined surface, 13g ... folded part,
14 ... Spring,
15 ... Shaft bar,
16 ... Knock cover, 16a ... Inner surface,
17 ... Knock member, 17a ... Convex part, 17b ... First large diameter part, 17c ... Second large diameter part, 17d ... Third large diameter part, 17e ... Groove part, 17f ... Maximum diameter part,
18 ... slider, 18a ... convex part,
19 ... Spring,
20 ... O-ring.

Claims (1)

A cursive pen having a pen tip in which a pen and a pen core are overlapped inside the barrel is accommodated so as to be movable back and forth, and the elastic force of the elastic member arranged in the barrel allows the barrel to move. A fountain pen having a lid that closes the front and having a structure in which the lid is pushed and opened by the front portion of the cursive by operating an operation portion provided on the barrel.
The lid is a metal plate formed of stainless steel, and a protruding portion that the pen core comes into contact with when the writing body advances is integrally provided on the back surface of the lid by press molding. A rear inclined surface and a front inclined surface with which the pen core is in sliding contact are provided in the rear and front of the protruding portion, a hollow pipe is attached to the front portion of the barrel, and the front of the hollow pipe has elasticity and is front and rear. An elastic tip that opens is attached, a presser spring made of a torsion coil spring is used as the elastic member, the first arm of the presser spring is locked to the locking portion of the lid, and the coil portion of the presser spring is engaged. A shaft rod fixed to the hollow pipe together with a support portion of the lid body is axially attached, the second arm of the holding spring is abutted against the side surface of the hollow pipe, and the holding spring repels the lid body. The pen is characterized in that the lid is brought into close contact with the inclined front end surface of the elastic tip to seal the barrel.

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