JPH06328892A - Writing utensil - Google Patents

Abstract

PURPOSE:To supply to feeding ink in a body to a writing tip continuously without pressing the tip to a surface of a sheet and use all hard/soft writing tips. CONSTITUTION:The writing utensil comprises an ink flow-out control mechanism for mounting a writing tip 2 at an end of a body 3, a tip holder 9 for holding to engage the tip 2 with a rear end axial center, a valve holder 11 having an ink flow-out hole 10 around the holder 9, a valve 13 for switching the hole 10 and having a tip inserting hole 12 through which the tip 2 is inserted, and a spring 14 for energizing the valve 13 in a normal valve opening direction. An external communication window 7 is opened at a barrel wall of the body 3 covered with an end cap 5 in a switching range of the valve 13. When the cap protrudes externally from the window 7 to be mounted on the body 3, a valve closing piece 16 for engaging the cap 5 to move the valve 13 in a valve closing direction is provided in the valve 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument, and more specifically, it supplies ink contained in a main body portion directly or through an ink tank to a writing tip at the tip of the main body portion through an ink outflow control mechanism. TECHNICAL FIELD The present invention relates to an improvement of a writing instrument of a type, particularly a writing instrument having a valve type ink outflow control mechanism for supplying ink in a main body portion to a writing tip by a valve opening operation of a valve.

[0002]

2. Description of the Related Art Conventionally, the ink outflow control mechanism of this type of writing instrument is generally constructed by the structure shown in FIG. Such an ink outflow control mechanism includes a valve main body 32 having an ink inlet 31 on a rear end side peripheral surface of the main body 30 that directly accommodates the ink 1 in contact with the internal ink 1, and a rear end valve support portion of the valve main body 32. The rod-shaped valve 33 is fitted inside the valve body 32 so that the rear end is slidably slidably fitted into the valve body 32a, and the valve 33 is fitted into the tip of the valve body 32. The coil spring 35 is configured to urge the valve valve 34 toward the valve valve 34 with a spring pressure stronger than the writing pressure at the time of writing. However, the above-mentioned ink outflow control mechanism has a coil spring 35 when not in use.
The valve element 33a of the valve 33 by the spring force (biasing force) of
The valve 1 is seated on the valve seat 34a to stop the outflow supply of the ink 1 in the main body 30 to the writing tip 36. Then, at the time of writing, the writing tip 36 is pressed against the writing paper surface with a strong force against the spring pressure of the coil spring 35 to move the valve 33 backward together with the writing tip 36, so that the valve body 33a of the valve 33 is moved to the valve seat 3
The ink 1 in the main body 30 is separated from the 4a and the writing tip 36
It is configured so as to be outflow supplied to.

However, in the conventional ink outflow control mechanism of a writing instrument, a coil spring 35 stronger than the writing pressure at the time of writing is used to seat the valve element 33a of the valve 33 against the valve seat 34a of the valve valve 34. Since the seat 34a is configured to be closed,
During the writing, the supply of the ink 1 in the main body 30 to the writing chip 36 was interrupted, and continuous smooth writing cannot be expected.
Therefore, in the past, writing was interrupted halfway and as described above,
It is necessary to perform a supplying operation of pressing the writing chip 36 against the surface of the writing paper with a comparatively large force against the spring pressure of the coil spring 35 to supply the ink 1 to the writing chip 36. , Has inconvenience in handling. At the same time, the supply operation of pressing the writing tip 36 against the writing paper surface with a comparatively large force against the spring pressure of the coil spring 35 is performed, so that the hardness of the writing tip to be used is restricted. That is, only a writing chip formed of a hard material having strength and pressure resistance that does not crush the original shape of the chip when pressed against the surface of the writing paper is used. In other words, there was a restriction that a writing tip formed of a soft material that enables smooth writing with a soft touch cannot be used.

Further, the valve 33, which constitutes the ink outflow control mechanism of the conventional writing instrument, is the tip of which the rear end of the writing tip 36 abuts from the valve body 33a which is seated on the valve seat 34a of the valve valve 34 by the spring pressure of the coil spring 35. Is long. In other words,
A valve seat to which ink 1 flows out from the rear end of the writing tip 36
Since the distance to 34a is relatively large, it takes time to reach the writing tip 36 of the ink 1 flowing out from the inside of the main body portion 30 when the valve body 33a is separated from the valve seat 34a. There is also an inconvenience that the ink 1 in the main body portion 30 is not easily supplied to the writing chip 36 during use or after a certain period of use.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional situation, and continuously without any troublesome operation such as pressing a writing tip against a writing paper surface during writing. An object of the present invention is to provide a writing instrument having an ink outflow control mechanism that can supply the ink in the main body portion by flowing out to the writing tip and can use all writing tips without any hard or soft question.

[0006]

To achieve the above object, the technical means taken by the present invention is to attach a writing tip to the tip of a main body to which a tip cap is attached via an ink outflow control mechanism. In the writing instrument, the ink outflow control mechanism is fixedly housed inside the front end of the main body part, and is provided with a tip holding part for inserting and holding a writing tip on the rear end axis and an ink outflow hole is provided around the tip holding part. A valve holder having the same, and a tip that is provided in the valve holder so as to be movable in the axial direction to open / close the ink outflow hole and insert a writing tip through the shaft core extending from the front end to the rear end in a penetrating manner. It is composed of a valve having an insertion hole and a spring member that is wound around the valve holder and urges the valve in the valve opening direction at all times. The tip cap is covered in the opening and closing movement range of the valve. A valve that opens an external communication window on the cylindrical wall of the main body and projects it outward from the communication port so that when the tip cap is attached, the valve moves in the valve closing direction against the spring material due to engagement with the cap. The feature is that the closing piece is attached to the valve.

[0007]

According to the above-mentioned technical means of the present invention, when the tip cap is pulled out from the main body, the holding state of the valve closing piece that is engaged and held by the tip cap is released, The valve is moved by a spring material in the valve opening direction to separate from the ink outflow hole of the valve holder, and the ink outflow hole is opened. As a result, the ink in the main body portion is continuously supplied from the ink outflow hole to the writing chip side without interruption. When the tip cap is inserted into the main body after use and attached, the valve is moved in the valve closing direction against the spring material due to the engagement of the valve closing piece with the tip cap. To close the ink outflow hole. As a result, the outflow supply of the ink in the main body portion to the writing chip side is stopped.

[0008]

EXAMPLE An example of an embodiment of the present invention will be described below with reference to the drawings. In the drawing, a writing tip 2 for guiding the ink 1 to a tip transfer portion by a capillary phenomenon through an ink outflow control mechanism accommodates the ink 1. An example of a writing instrument that is connected and attached to the tip of the ink tank 4 in the main body portion 3 is shown. By attaching / detaching the tip cap 5 to / from the main body portion 3, outflow and supply of the ink 1 from the ink tank 4 to the writing tip 2 side, It is configured to stop the supply.

The main body 3 has a thickness that is easy to grasp during writing and has an appropriate length. The front and rear ends of the main body 3 are opened, and the outer end of the outer pipe 3a is formed in a tapered shape with a step.
The outer pipe 3a has a thickness and a length that allow it to be loosely fitted and inserted into the large-diameter cylindrical portion 3a-1 excluding the stepped and tapered distal end side of the outer pipe 3a. The end pipe is fitted with the rear end opening of the outer pipe 3a to close the opening, and the inner pipe 3b becomes a bottomed ink tank 4 with a thick collar lid 6 and is doubled. The inner pipe 3b has a cylindrical structure, and the ink 1 is filled and contained in the inner pipe 3b. An ink outflow control mechanism is connected to the tip opening of the pipe 3b.
After the tip insertion hole 12 of the outer pipe 3a is fitted and inserted in a penetrating manner, the inner pipe 3b is fitted and inserted into the pipe 3a from the rear end opening side of the outer pipe 3a. The writing tip 2 is configured to be mounted with the tip of the writing tip 2 protruding.

Reference numeral 7 in the drawing denotes a tip end cap of a stepped connection portion of a large-diameter tubular portion 3a-1 of the outer pipe 3a and a stepped tubular portion 3a-2 whose thickness is slightly reduced in the opening / closing movement range of the valve 13. 5 is an external communication window opened at several locations (three locations in the illustrated example) on the tubular wall covered by the circumferential direction at equal intervals (see FIG. 2). From this external communication window 7, a valve closing piece 16 described later is connected to the outer pipe. When the tip cap 5 is inserted into and attached to the pipe 3a, the locking step portion 8 formed on the inner surface of the opening edge of the cap 5 is provided with the valve closing piece 16 when the tip cap 5 is protruded to the outside of the pipe 3a.
And the valve 13 is moved in the valve closing direction.

The ink outflow control mechanism is provided with a tip holding section 9 for inserting and holding the writing tip 2 in the rear end axis, and a valve holding body 11 having an ink outflow hole 10 around the tip holding section 9, and this valve. A tip insertion hole 12 is provided in the holder 11 so as to be movable in the axial direction to open and close the ink outflow hole 10 and to insert the writing tip 2 through the shaft core extending from the front end to the rear end in a penetrating manner. Valve 13 and this valve 13
And a spring member 14 for constantly urging the valve holder 11 toward the valve opening direction. When the tip cap 5 is removed from the main body 3 at the time of use, the valve 13 is moved by the elastic force of the spring member 14.
So that the ink 1 in the inner pipe 3b flows out and is supplied to the writing tip 2 side, and the tip cap 5 is inserted into the outer pipe 3a after use. By installing,
The valve 13 is moved in the direction of the ink outflow hole 10 against the spring material 14 to close the outflow hole 10 and stop the outflow of the ink 1 in the inner pipe 3b to the writing tip 2 side.

The valve holder 11 includes a large-diameter cylindrical portion 3a-1 of the outer pipe 3a to which the pipe 3b is loosely fitted and connected to the inner pipe 3b to a stepped cylindrical portion 3a-2. Over the entire length, and the same inner diameter (same shape) over the entire length, and the outer diameter (outer shape) is formed into a hollow cylindrical shape with a stepped shape in which the thickness is changed at the substantially central portion in the cylindrical direction. The outer pipe 3a is configured so as to be fixedly fitted and internally mounted from the large diameter cylindrical portion 3a-1 to the stepped cylindrical portion 3a-2. Then, a connecting portion 15 for airtightly fitting and connecting to the inner pipe 3b is formed at the rear end portion of the valve holder 11, and the rear end of the writing tip 2 is fitted and connected to the bottom axis of the connecting portion 15. A chip holding portion 9 for fixing and holding the chip 2 is provided in the shape of a reverse opening opposite to the connection portion 15, and the chip holding portion 9 is provided.
An ink outflow hole 10 having an appropriate opening shape is provided at several places (three places in the illustrated example) around (see FIG. 3). Also, a valve closing piece is provided on the tip side of the valve holder 11.
Notch 17 that projects 16 toward the inner surface side of the outer pipe 3a so as to project outward from the external communication window 7 of the pipe 3a.
Is provided in the opening width of the window 7 in an appropriate opening length in the cylinder direction from the tip edge.

The valve 13 has such a length that the front end side of the valve 13 is concentrically supported and housed in the valve holder 11 and the front end side of the valve 13 protrudes from the tip opening of the holder 11 by an appropriate length. The outer diameter is approximately the same as the inner diameter of the valve holding body 11, and a hollow cylindrical shape having a chip insertion hole 12 penetrated in a stepped manner with the rear end side having a small diameter in the shaft core extending from the front end to the rear end. And a valve body 18 which is seated on the tip holding portion 9 of the valve holding body 11 to stop the outflow of the ink 1 from the ink outflow hole 10 to the writing tip 2 is attached to the rear end of the valve holding body 11.
In the outer circumferential direction corresponding to each of the notches 17 of the above, a valve closing piece portion 16 is provided so as to project, and the valve closing piece 16 is provided with each notch 17
In a state where it is further projected, the valve holder 11 is fitted and inserted in the valve holder 11 so as to be movable in the axial direction (back and forth), and is supported and provided coaxially.

When the tip end cap 5 is inserted into the outer pipe 3a and attached, the valve closing piece 16 engages with the locking step portion 8 of the cap 5 so that the valve 13 is opposed to the spring member 14 and the valve holder 11 is engaged. Of the valve holder 11 is slidably brought into contact with each of the above-mentioned notches 17 of the valve holder 11 by closely seating it on the tip holder 9 and closing the ink outflow hole 10 opening around the holder 9. The protruding shape is such that it can be freely adapted, and the protruding height is such that it slidably contacts the inner surface side of the outer pipe 3a and a part of the window 7 of the pipe 3a protrudes outward as shown in the drawing. (See Figures 1-2). Then, the spring material 14 is wound and mounted between the valve closing piece 16 and the locking step portion 19 on the outside of the valve holding body 11 to separate the valve 13 from the tip holding portion 9 and write from the ink outflow hole 10. The ink 1 is constantly urged in the valve opening direction to maintain the outflow and supply state of the ink 1 to the chip 2.

The writing tip 2 impregnates and holds the ink 1 inside and guides the ink 1 to the tip by a capillary action and transfers it to the surface of the writing paper. For example, as shown in the drawing, it is hard from a porous material or a fiber material. Made of a material, or a soft material such as a brush pen, having such a length that the tip projects from the tip opening of the outer pipe 3a with the rear end being fitted and held in the tip holder 9 of the valve holder 11. The diameter of the tip insertion hole 12 of the valve 13 is made slightly smaller than that of the tip insertion hole 12 of the valve 13, and the rear end side is slidably inserted through the small diameter hole 20 at the rear end of the valve 13 An overall shape having a thickness capable of being fixedly fitted and fixed to the holding portion 9 is formed into a stepped rod shape.

The spring member 14 for constantly urging the valve 13 in the valve opening direction so as to separate the valve 13 from the tip holding portion 9.
The spring force (urging force) may be such that it can reliably move the valve 13 forward in the valve opening direction when the tip cap 5 is removed from the outer pipe 3a. 21, 22 in the figure
Is a hooking projection formed in a ring shape on the inner peripheral surface of the tip cap 5 and the outer peripheral surface of the stepped cylindrical portion 3a-2 of the outer pipe 3a covered by the cap 5, and both the hooking projections 21, The latching force of 22 is set to a force stronger than the spring force of the spring member 14 for urging the valve 13 in the valve opening direction. The spring force of the spring member 14 allows the tip cap 5 to easily move from the main body 3. The attached state is kept so that it does not come off. Reference numeral 23 is an O-ring mounted on the outside of the valve 13 which is provided inside the stepped cylindrical portion 3a-2 of the outer pipe 3a in a loosely fitted manner.

According to the writing instrument of the present embodiment having the above-described structure, when the tip cap 5 is removed from the outer pipe 3a of the main body 3, the valve closing piece engaged and held by the tip cap 5 is removed. The holding state of the portion 16 is released and the valve 13 is made to have an ink outflow hole of the valve holding body 11 by the spring member 14.
It is moved in the valve opening direction away from 10 to open the ink outflow hole 10 and the ink 1 in the inner pipe 3b flows out to the writing tip 2 side and is supplied to the writing tip 2 (see FIG. 4). At this time, the valve body 18 of the valve 13 is separated from the tip holding portion 9 and at the same time, the ink 1 in the inner pipe 3b is supplied from the ink outflow hole 10 to the writing tip 2 fixedly held in the tip holding portion 9 and interrupted. It is continuously spilled without being supplied. When the tip cap 5 is inserted into the outer pipe 3a and mounted after use,
By engaging the valve closing piece portion 16 with the locking step portion 8 on the inner surface of the opening of the tip cap 5, the valve 13 is made to approach the ink outflow hole 10 against the spring material 14, and the valve body 18 is seated on the tip holding portion 9. The ink outlet hole 10 is moved in the valve closing direction.
Is closed to stop the supply of the ink 1 in the inner pipe 3b to the writing chip 1 side (see FIG. 1).

[0018]

Since the writing instrument of the present invention is provided with the ink outflow control mechanism configured as described above, it has the following operational effects. ． When the tip cap is removed from the body, the holding state of the valve closing piece that was engaged and held by the tip cap is released, and the valve moves by the spring material in the valve opening direction to separate it from the ink outflow hole of the valve holder. The ink outflow hole is opened by being pressed, and the ink in the main body is continuously outflowed from the ink outflow hole to the writing tip side without interruption. Then, after use, when the tip cap is inserted into the main body and mounted, the valve closing piece is engaged with the tip cap to move the valve in the valve closing direction to approach the ink outflow hole against the spring material and the ink outflow. The hole is closed, and the supply of the ink in the main body to the writing tip side is stopped. Therefore, according to the writing instrument of the present invention,
By removing the tip cap from the main body, the ink inside the main body is supplied to the writing tip, which is a hassle to press the writing tip against the writing paper surface during writing like a conventional writing instrument. It is possible to keep the valve open state by the spring material without performing any operation, and to continuously flow out the ink in the main body portion to the writing tip without interruption to supply the ink. Therefore, continuous writing is possible. ． Moreover, since it is not necessary to press the writing tip against the surface of the writing paper during writing, it is possible to use a writing tip made of a hard material as well as a writing tip made of a soft material such as a writing pen. Therefore, it is possible to provide a highly versatile writing instrument that enables the use of all writing chips without questioning whether the writing is hard or soft. ． The writing tip is fixedly fixed and held on the valve holder, and the valve is biased and held in the valve opening direction by a spring material that does not receive the writing pressure at the time of writing, i.e. the valve open state corresponds to the writing pressure at the time of writing. Since it is always kept constant without being affected by it, it is possible to always supply a constant amount (appropriate amount) of ink to the writing tip from the inside of the main body regardless of the writing pressure level that differs depending on the writer (user). . Therefore, a constant amount of ink can be expected to be supplied at all times without stain of the writing paper due to dripping of the ink due to excessive amount of ink during writing, and stable writing can be expected.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an example of implementation of a writing instrument of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line II-II in FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a vertical sectional view with a tip cap removed.

FIG. 5 is a vertical cross-sectional view of a main part showing a conventional example.

[Explanation of symbols]

1 ... Ink 2 ... Writing tip 3 ... Main body 5 ... Tip cap 7 ... External communication window 9 ... Tip holding part (ink outflow control mechanism) 10 ... Ink outflow hole 11 ... Valve holding body (ink outflow control mechanism) 12 ... Chip Insertion hole 13 ... Valve (ink outflow control mechanism) 14 ... Spring material (ink outflow control mechanism) 16 ... Valve closing piece

Claims (1)

[Claims] 1. A writing instrument comprising a writing tip attached to a tip of a main body part to which a tip cap is attached via an ink outflow control mechanism, wherein the ink outflow control mechanism is fixed and stored inside the tip of the main body part. And a valve holding body having a tip holding portion for inserting and holding a writing tip on the rear end shaft core and having an ink outflow hole around the tip holding portion; and a valve holding body internally movably in the axial direction. A valve having a tip insertion hole for penetrating a writing tip in a shaft center extending from the front end to the rear end while opening and closing the ink outflow hole, and being wound and mounted on the outside of the valve holder. The valve is composed of a spring member that normally urges the valve in the opening direction, and an external communication window is opened in the cylinder wall of the main body covered by the tip cap in the opening and closing movement range of the valve, and protrudes outside from the communication port. Let When installing the tip cap,
A writing instrument characterized in that a valve closing piece for moving the valve in the valve closing direction against the spring material by engagement with the cap is provided on the valve.