JP2001047789A - Writing utensil with seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing utensil with a seal excellent in its portability and convenience of use. SOLUTION: This writing utensil with a seal has return springs 48a and 48b, one end of each of which is engaged to a center barrel 30 so as to respectively energize each writing body rearwards, sliding pieces 40a and 40b respectively energize rearwards by the return springs 48a and 48b mounted to the rear parts of the writing bodies, a cylindrical cam 34, at the front surface of which a cam inclined surface selectively advancing the writing body by depressing the rear end of either one of the sliding pieces 40a and 40b is provided and which is equipped with an engaging part engaging with the center barrel 30, sliding towards a fore barrel of which an inner tube 43 is provided integrally so as to fix a seal 52 equipped with a printing body 53 having an infinite number of open cells and being impregnable with quick drying ink at the rear end of the inner tube 43 under the condition that a rear barrel 45 with its rear end close covers the seal 52 and is detachable to the outer peripheral part of the inner tube 43 and, at the same time, fixed integrally to the inner tube 43 and the printing body 53 of the seal 52 is perfectly shut off from the out side air by the rear barrel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing implement with a seal, comprising a plurality of writing bodies at the tip of the shaft and a seal impregnated with quick drying ink at the rear end of the shaft.

[0002]

2. Description of the Related Art Conventionally, there has been no need to use a printing material formed of a porous stamping material having an infinite number of continuous pores such as sponge rubber so as to absorb ink, and to attach it to vermilion or the like every time it is used. Seals are known. It is also known that these seals are unitized and detachably attached to the rear end of the shaft cylinder of a writing instrument or the front end of the shaft cylinder of a seal holder. By the way, the conventional seal stores a printing body 53 which can be impregnated with ink inside a cover 55 having a tubular upper end with a hole as shown in FIG. 9 and exposing a printing surface 53a from the hole. At the same time, the ink storage body 81 is disposed on the opposite surface 53b of the printing body 53, and the upper surface 79 of the mounting base 78 is brought into contact with the opposite surface 81b of the ink storage body 81 to fix the cover 55 to the mounting base 78. ing. A vent hole 80 is formed in the upper end 79 of the mounting table. In the thus configured seal 77, the ink is apt to evaporate from the air holes 80, but the ink that is usually used is slow drying and causes few problems. However, conventional inks have problems such as slow drying of the seal and easy bleeding of documents.

[0003] As a retracting mechanism of the writing tip portion of the double-type writing instrument, a knocking type mechanism, a slider-type mechanism which alternately slides a slider protruding from the side of the barrel of the writing instrument,
Various types, such as a cam type rotating a cam cylinder having an inclined surface, are known.

[0004]

An object of the present invention is to provide a stamp which is impregnated with quick-drying ink at the rear end of the shaft to solve the above-mentioned problem, and to select the tip of the writing body at the end of the shaft. An object of the present invention is to provide a writing instrument with a seal that is highly portable and easy to use.

[0005]

The present invention has the following arrangement to solve the above-mentioned problems. The writing implement with a seal according to the invention according to claim 1 is a writing implement with a seal comprising a plurality of writing bodies at the tip of the shaft and a rear shaft (cap) covering the seal at the rear end of the shaft. A middle shaft provided between the shaft and the rear shaft, a return spring having one end locked to the middle shaft and biasing the writing body backward, and a return spring attached to the rear of the writing body and attached rearward by the return spring. The front surface has a sliding piece to be urged and a cam slope which presses any rear end of the sliding piece to selectively advance the writing body, and engages with the above-mentioned center shaft to slide in the direction of the front shaft. A cylindrical cam having an engaging portion that is rotatable and rotatable, and an inner cylinder is integrally provided behind the cylindrical cam, and has an infinite number of continuous pores at the rear end of the inner cylinder. A seal with a printed body that can be impregnated with dry ink is fastened and closed at the rear end. Axis detachable to the outer periphery of the inner cylinder by clothing the seal, with the inner cylinder and integrally fixed and, seal printing member by the rear axle, which are completely cut off the outside air.

[0006] The writing implement with a seal according to the second aspect of the present invention is the writing implement with a seal according to the first aspect, wherein the seal is:
Opening is provided only on the printing surface side, and an air flow passage communicating between the printing surface side and the opposite surface of the printing body or the opposite surface of the ink occluding body is provided.

According to a third aspect of the present invention, there is provided a writing instrument with a seal according to the second aspect, wherein a seal member is provided at a rear end of an inner hole of the rear shaft, and the rear shaft is an inner cylinder. The seal member is closed at the front end of the seal member.

[0008]

1 to 4 show an embodiment of a writing implement with a seal according to the present invention. In FIG. 1, two ballpoint pen writing bodies 1a and 1b are provided. The writing implement with seal of the embodiment is equipped with at least one ballpoint pen writing body filled with an aqueous or low-viscosity oil-based ballpoint pen ink at the tip of the shaft, and a seal at the rear end of the shaft. .

Further, the front shaft 49 and the center shaft 30 for accommodating a part of the writing instrument mechanism located at the front, and the seal 5 located at the rear.
2, an inner cylinder 43 for fixing the seal, a seal and its seal face 53
and a rear shaft 45 which is attached to the inner cylinder 43 so as to be detachable and fixed integrally. A female screw 50 is formed on the inner periphery of the rear part of the front shaft 49, and a male screw 32 is formed on a small diameter portion at the front part of the center shaft 30, and screwed with the female screw 50 of the front shaft 49, Removed as needed to replace cursive. A cylindrical cam 3 (described later) is attached to the rear end of the center shaft 30.
A notch-shaped stopper is formed on the outer periphery of the outer peripheral surface 4 to restrict the rotational position by abutting a rib provided on the outer periphery. A window 33 is formed in the rear side surface of the central shaft 30 and four guide ribs 31 formed in the inner peripheral portion of the central shaft 30 at an interval of 90 degrees in the axial direction. Is formed.

A return spring 4 for urging the ballpoint pen writing bodies 1a, 1b backward is provided at the front of the center shaft 30.
The front ends of 8a and 48b are locked. Then, the receiving shafts 42a, 42b are provided on the sliding pieces 40a, 40b toward the front.
b is fixed through the inner holes of the return springs 48a and 48b, the rear portions of the ballpoint pen writing bodies 1a and 1b are attached to the front ends of the receiving shafts 42a and 42b, and the rear ends of the return springs 48a and 48b are 40a, 40
b and are urged rearward, respectively. The sliding pieces 40a and 40b have a cam surface which advances by pressing a cam slope 35 due to rotation of a cylindrical cam described later, and projections 41a and 41b at the rear end.

The grooves 47a, 47b provided on the side surfaces of the sliding pieces 40a, 40b engage with the guide ribs 31 provided inside the center shaft 30, respectively, so that the sliding pieces 40a, 40b can be smoothly moved. Move back and forth. The cross section of the sliding pieces 40a and 40b is substantially D-shaped. Therefore, there is an advantage that a complicated structure for mounting a guide cylinder having two opposing guide grooves, which is often shown in the conventional example, is not required.

Next, the cylindrical cam 34 is provided with a ring-shaped engaging projection 37 on the outer periphery thereof which is rotatable by engaging with the center shaft 30. Since the center shaft 30 has a pair of thick portions 33a facing the rear portion and the window 33 is bored, when the front end of the cylindrical cam 34 is pressed into the center shaft 30, the ring-shaped engagement protrusion 37 is inserted. At this time, the thick portion 33a is pushed open and fitted into the window portion 33, so that the cylindrical cam 34 is rotatably stopped. When it is necessary to advance the cylindrical cam 34 appropriately (knock operation of one of the writing materials as a mechanical pencil), the window 33 is formed to a length that does not hinder the operation of the engaging projection 37. Is done. Also, cylindrical cam 3
A rear end of the shaft 4 has a step portion 39a and a shaft portion 38 with a slightly reduced diameter formed rearward, and a rear end of the shaft portion 38 has a locking portion 39 having a slightly umbrella-shaped flange. I have.

On the other hand, the inner cylinder 43 has a flange 44 at the tip of the outer cylinder 43a, and a wall 43 is provided between the inner cylinder 43 and the inner periphery behind the outer cylinder 43a.
c to form an inner cylindrical portion 43b integrally joined,
The inner cylindrical portion 43b is fitted to the shaft portion 38 of the cylindrical cam 34 so that the front end of the wall 43c is in contact with the step 39a of the cylindrical cam, and the rear end of the inner cylindrical portion 43b is engaged by the locking portion 39. Then, the inner cylinder 43 is fixed to the cylindrical cam 34. An engaging portion such as a groove or a rib is provided between the inner periphery of the inner cylindrical portion 43b and the outer periphery of the shaft portion 38, and the rotation is stopped. (Not shown)

A seal 52 described later has a front shaft portion 58.
Is inserted between the outer cylinder portion 43a and the inner cylinder portion 43b of the inner cylinder, the flange portion 56 is brought into contact with the rear end of the outer cylinder portion 43a, and the engagement between the outer cylinder portion and the inner cylinder portion is made. And are fixed to the inner cylinder 43.

The rear shaft 45 is a closed-end cylindrical body having a base 45a provided on one side surface on the rear end side, and a rear end of the clip 46 fixed to the base 45a. The rear shaft 45 is fitted to the outer periphery of the inner cylinder 43 in a non-contact state with the outer periphery of the seal 52, and the tip of the rear shaft 45 contacts the flange 44 at the tip of the inner cylinder. An engagement portion such as a groove or a rib is also provided between the inner peripheral surface of the rear shaft 45 and the outer cylinder portion 43a of the inner cylinder, the rotation is stopped, and the engagement between the inner cylinder and the outer cylinder section 43 is performed by an appropriate fitting force. It is made to be stopped. (As one illustrated example, the convex portion 43d and the concave portion 45
b) A sealing member 69 such as resin or rubber is provided at the rear end of the inner hole of the rear shaft 45, and when the rear shaft 45 is fixed to the inner cylinder 43, the front end of the sealing member 69 comes into close contact. The opening of the seal can be sealed.

Next, the writing pen 1a will be described. Note that the ballpoint pen writing bodies 1a and 1b have the same configuration, and have different ink colors, for example. The ink applied to the ballpoint pen writing material is a water-based, low-viscosity oil-based ink having a so-called shear thinning property.

As shown in FIG. 4, the tip 11 is caulked so that the tip ball 12 is rotatably held with the tip ball 12 substantially in contact with a seat having a channel into which ink can flow. . A spring 14 is inserted into the inner hole of the chip 11, and the rear end of the shaft 13 of the chip is appropriately caulked so that the rear end of the spring 14 cannot be pulled out. In addition, it is extremely important that the tip ball 12 is in close contact with the inner surface of the tip holding portion in order to dry the writing tip and to prevent direct current of ink. Therefore, the surface roughness of the tip holding the tip ball and the caulking In order to improve the close contact accuracy, grinding of the inner surface and secondary plastic working to increase the crimping accuracy are considered. In addition, a surface treatment or the like is taken into consideration for the surface in close contact with the tip ball. Further, the tip of the spring 14 becomes an upright bar shaft portion 15, and the front end of the bar shaft portion 15 contacts the rear end of the tip ball 12 in a pressed state. The tip ball 12 is brought into close contact with the inner edge of the ball holding portion (formed by caulking or the like) of the chip 11 by the pressing.

The joint 2 is provided at the tip with the shaft 1 of the tip 11.
A front shaft 3 for pressing the third shaft 3 and a rear shaft 5 to be pressed against the front end of the ink storage tube 17 are formed, and the space between the front shaft 3 and the rear shaft 5 is flexible. It is formed of a resin molded product integrally connected by the part 4 and the like. Further, a valve chamber 7 in which a ball valve 16 is loosely fitted is provided behind the inner hole of the front shaft section 3, and a tapered or spherical ball receiving seat 8 is provided behind the valve chamber 7 and a ball receiving seat 8. Eccentrically provided guide hole 9
The inner holes of the bellows 4 and the rear shaft portion 5 communicate with the inner holes of the ink storage tube 17. A groove is provided on one side of the inner wall of the valve chamber 7 so that ink flows in the axial direction. (Not shown) The loosely fitted ball valve 16 in the valve chamber 7 is in contact with the tip end of the shaft portion 13 in a state where the tip 11 faces downward to form an ink flow path. Then, the ink in the ink storage tube flows into the chip inner hole through the groove, the ink flow path, and the like through the guide hole 9.
On the other hand, in the upward state, the ball valve 16 comes into contact with the ball receiving seat 8 to obtain a function of preventing the ink from flowing backward.

The ink container tube 17 is filled with the ink 18 of the above-mentioned ball-point pen, and the rear end of the ink 18 is a grease-like half which can move following the ink surface as the ink is consumed. A follower 19 made of a transparent non-drying substance is filled. Further, a resin follower rod 20 having a specific gravity substantially equal to that of the follower 19 is immersed in the follower 19 as necessary in order to prevent deformation due to dropping, knock impact or the like. The ink storage tube 17 is made of, for example, a transparent PP resin molded product. Also, select the ink storage tube from a material with excellent clear drain properties. Further, the ink storage tube 17 may be formed integrally with the joint 2.

The ink storage portion of the ink storage tube 17 is of a non-deformed type having a relatively large cross-sectional area. In the embodiment, the ink storage portion has a substantially D-shaped cross-sectional shape that can be inserted into the center shaft 30 without waste. are doing. The portion connecting the tip 11 and the ink storage portion can be easily shifted in the lateral direction with respect to the axial direction. It is also possible to connect a flexible tube between the joint for crimping the rear end of the chip 11 and the ink containing tube.

FIG. 5 shows a first embodiment of a seal.
Also, the seal 52 is described above. The seal 52 has a cylindrical portion 59 integrally provided inside a rear shaft portion 57 of the mounting base 54.
The ink storage body 60 is accommodated therein, and a printing body 53 made of continuous porous rubber or the like is placed on the rear end of the mounting table 54 in a state where the printing body 53 is in contact with the rear end of the ink storage body 60.
The cover 55 is mounted with the a exposed, and the cover 55 is fixed to the outer periphery of the rear shaft portion 57 with its front end in contact with the flange 56 of the mounting base. In addition, the mounting base 54 is
6 has a front shaft portion 58, the front shaft portion 58 is inserted between the outer tube portion 43a and the inner tube portion 43b of the inner tube, and a flange portion 56 is provided at the rear end of the outer tube portion 43a. The seal 52 is fixed to the inner cylinder 43 by being abutted and engaged with any of the outer and inner cylinders. Also, the opposite surface 60b of the ink occluding body 60
And a groove 61 communicating with the opposite surface 53b of the printing body 53 is formed on the outer periphery of the ink occluding body or the inner surface of the cylindrical portion 59,
A groove 62 communicating with the groove 61 is provided on the side surface of the printing body 53 on the outer circumference of the printing body or the inner circumference of the cover 55, and an opening is formed only on the printing surface side of the seal from the opposite surface of the ink occluding body 60. An air flow passage communicating with is formed.

FIG. 6 shows a second embodiment of a seal. The seal 63 is basically the same as the first embodiment. The seal 63 has a groove 64 a formed at the rear end of the mounting table 64 and a groove 66 provided on the side surface of the printing body 53 and the ink occluding body 65 communicating with each other. An air flow passage communicating with an opening provided only on the printing surface side from the opposite surface of the ink occluding body is formed.

FIG. 7 shows a third embodiment of a seal. The seal 67 is the same as that of the second embodiment except that there is no ink occluding body.

FIG. 8 shows a fourth embodiment of the seal. The seal 70 differs from the seals of the first to third embodiments in that the groove 74 a provided on the opposite surface of the ink occluding body 76 is formed between the outer periphery of the rear shaft 72 of the mounting base 71 and the cover 55. The peripheral groove 72a, the vertical groove 72b, and the peripheral groove 72c are sequentially communicated with each other, and open to a ventilation hole 75a formed in the flange portion 75. That is, the seal 70 is provided with two openings, that is, the printing surface side and the ventilation port 75a. When the seal 70 is fixed to the rear end of the inner cylinder 43 described above, it is necessary to provide a seal portion at a required position on the outer periphery of the inner cylinder 43 and the inner periphery of the rear shaft 45. In this case, the above-mentioned convex portion 43d and concave portion 45b may be closely fitted, or the closely fitted portion may be provided separately. In this case, the seal member 69 may not be provided.

[0025]

The writing implement with a seal according to the present invention is configured as described above, and communicates with the opening provided only on the printing surface side from the opposite side of the printing body or the ink occluding body even with the ink that dries quickly. Inner air passage is formed.
When the rear shaft 45 is fixed to the seal 3, the front end of the seal member 69 is in close contact with the corner of the seal cover, the printing surface side is completely sealed, and evaporation of the ink is prevented. Further, when not in use, the groove communicating with the printing surface side and the opposite surface side of the ink occluding body can be tightly fitted in the same chamber, so that the problem of ink being blown out due to an increase in internal pressure is prevented.

When the rear shaft 45 is rotated with respect to the center shaft 30, one of the writing bodies is selected by the cam slope 35 accompanying the rotation of the cylindrical cam 34, and the writing tip of the writing body is projected from the front end of the front shaft 49. It becomes possible. Further, even if the ink storage portion of the ballpoint pen writing body is not deformed, the writing tip portion flexibly shifts, so that the operation is not hindered and the writing tip portion smoothly protrudes from the tip end of the front shaft 49. by the way,
When one cursive type is a mechanical pencil, and the selected cursive type is a mechanical type, the rear axis 45 is used.
Knock on the back end and pull out the core. Further, in the case of stamping, the rear shaft 45 may be removed from the inner cylinder 43.

In the state where the tip 11 is turned upward, the ball valve 16 is positioned on the ball receiving seat 8 of the valve chamber 7 and seals the guide hole 9 in the ballpoint pen writing body 1a. Even if the ink immediately below the tip ball 12 runs out, the ink is caught by the head and does not flow backward. Further, since the tip ball 12 is brought into close contact with the inner edge of the chip holding portion by the pressing of the rod shaft portion 15, direct current of ink is prevented.

[0028]

The construction and operation of the writing instrument with a seal of the present invention are as described above, and a seal with impregnated ink of a quick-drying type can be mounted. Thus, a seal that dries quickly and does not smear can be provided. In addition, it is possible to provide a writing implement with a seal that is excellent in portability and usability, and is equipped with a plurality of writing bodies such as a medium-viscosity water-based or low-viscosity oil-based ballpoint pen writing body having a thick writing line.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entirety of a writing implement with a seal, which is one embodiment of the present invention, and is partially shown in a non-sectional view.

FIG. 2 is a cross-sectional view of a sliding top portion located on a center shaft.

FIG. 3 is a cross-sectional view of an ink accommodating portion of a ballpoint pen writing body located at a center axis.

FIG. 4 is a vertical cross-sectional view of the ballpoint pen writing body according to the embodiment.

FIG. 5 is a sectional view showing Embodiment 1 of the seal.

FIG. 6 is a sectional view showing Embodiment 2 of the seal.

FIG. 7 is a sectional view showing Embodiment 3 of the seal.

FIG. 8 is a sectional view showing a fourth embodiment of a seal.

FIG. 9 is a cross-sectional view showing a conventional form of a seal.

[Explanation of symbols]

 1a Ballpoint pen writing body 1b Ballpoint pen writing body 2 Joint 3 Front shaft part 4 Bellows 5 Rear shaft part 6 Flange part 7 Valve room 8 Ball receiving seat 9 Guide hole 10 Inner hole part 11 Chip 12 Tip ball 13 Shaft part 14 Spring 15 Rod shaft Part 16 Ball valve 17 Ink storage tube 18 Ink 19 Follower 20 Follower rod 30 Center shaft 31 Guide rib 32 Male screw 33 Window 33a Thick part 34 Cylindrical cam 35 Cam slope 36 Notch 37 Engagement projection 38 Shaft 39 Lock Part 39a Step part 40a Sliding piece 40b Sliding piece 41a Projection 41b Projection 42a Receiving shaft 42b Receiving shaft 43 Inner tube 43a Outer tube 43b Inner tube 43c Wall 43d Convex 44 Flange 45 Rear shaft 45a Base 45b Recess 46 47a groove 47b groove 48a return spring 48b return spring 4 9 Front shaft 50 Female screw 51 Rubber grip 52 Seal 53 Printing body 53a Printing surface 53b Opposite surface 54 Mounting stand 55 Cover 55a Corner 56 Flange 57 Rear shaft 58 Front shaft 59 Tube 60 Ink absorber 60a Contact surface 60b Opposite surface 61 groove 62 groove 63 seal 64 mounting base 64a groove 65 ink occluding body 66 groove 67 seal 68 printing body 69 seal member 70 seal 71 mounting base 72 rear shaft 72a circumferential groove 72b vertical groove 72c circumferential groove 73 front shaft 74 Cylinder 74a Groove 74b Groove 75 Flange 75a Vent 76 Ink occluding body 77 Seal 78 Mounting stand 79 Upper end 80 Vent hole 81 Ink occluding body 81b Opposite surface

Claims (3)

[Claims] 1. A writing instrument with a seal which comprises a plurality of writing bodies at the tip of the shaft and a rear shaft (cap) for covering the seal at the rear end of the shaft, provided between the front shaft and the rear shaft. A return shaft, one end of which is locked to the central shaft, for urging the writing body backward, a sliding piece attached to a rear portion of the writing body and biased rearward by the return spring; A cam slope on the front surface for selectively advancing the cursive writing by pressing any rear end of the moving piece, and is engaged with the center shaft to be slid in the front axis direction and rotatable. A cylindrical cam having a mating portion, and an inner cylinder integrally provided behind the cylindrical cam, and having a number of continuous pores at the rear end of the inner cylinder so that the ink can be impregnated with quick-drying ink. The seal with the character is fixed, and the rear shaft with the rear end closed is covered with the seal and outside the inner cylinder. Parts to be detachable, and the inner cylinder and with is integrally fixed, writing instrument with seal to seal the printing member by the rear axle is characterized by comprising completely blocked the outside air. 2. The seal has an opening only on the printing surface side and an air flow passage communicating between the printing surface side and the opposite surface of the printing body or the opposite surface of the ink occluding body. The writing implement with a seal according to 1. 3. The seal member according to claim 2, wherein a seal member is provided at a rear end of the inner hole portion of the rear shaft, and an opening of a seal is closed at a front end of the seal member when the rear shaft is fixed to the inner cylinder. Writing instrument with seal.