JPH0735082U - Ink holding device for writing instruments - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an ink holding device for a writing instrument that reliably holds a pen core and makes ink flow out favorably. [Structure] A writing instrument main body 12 having an ink chamber 11, a tip shaft 13 having a holding portion 13a provided at the tip of the writing instrument body 12, an ink holder 30 fitted in the tip shaft 13, and the ink chamber. 11 a valve mechanism portion 14 provided in the opening portion, and a holding portion 13 a and an ink holding body 3 in the leading shaft 13 that protrude outward through the valve mechanism portion 14
Ink holding device 1 for a writing instrument, which has a pen core 20 inserted and held in 0, and holds ink by the ink holding body 30.
No. 0, the ink holder 30 is formed of a tubular body, and at least one or more air circulation holes 32 are provided in the longitudinal direction of the inner peripheral portion of the tubular body.
Is provided with at least one or more holding projections 31.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ink holding device for a writing instrument, which is generally called a paint marker, for example.

[0002]

[Prior art]

 Conventionally, an ink holding device 1 for a writing instrument includes, for example, as shown in FIG. 3, a writing instrument body 3 having an ink chamber 2, a tip shaft 4 having a holding portion 4a provided at the tip of the writing instrument body 3, and An ink holder 5 made of sponge or the like fitted in the front shaft 4, a valve mechanism portion 6 equipped in the opening of the ink chamber 2, and protruding outward through the valve mechanism portion 6, and It is provided with a holding portion 4a in the leading shaft 4 and a pen core 7 inserted and held in the ink holding body 5, and the ink holding body 5 holds the ink flowing out from the ink chamber 2.

However, in the ink holding device 1 of this type of writing instrument, since the ink holding body 5 is a holding device for the ink and the holding device for the pen core 7, the outer shape of the ink holding body 5 and the tip A constant tightening margin is required for the inner diameter of the shaft 4, the inner diameter of the ink holder 5, and the outer shape of the pen core 7. If the tightening margin is large, the ink holder 5 made of sponge or the like is crushed (compressed) and becomes dense. However, there is a problem that the replacement of the air becomes worse and the outflow of the ink becomes worse, or the ink foams at times due to repeated compression and expansion. In addition, if the tightening margin is small, the ink holder 5 will often come out during assembly, and the pen core 7 will often come out during agitation during use, resulting in lower work efficiency and good results. There is a problem in that a good writing state cannot be obtained.

[0004]

[Problems to be solved by the device]

 The purpose of the present invention is to solve the above-mentioned problems of the prior art, to ensure a sufficient tightening margin, to securely hold the pen core, and to make the ink flow out well to improve the working efficiency and good writing. An object of the present invention is to provide an ink holding device for a writing instrument that can obtain a state.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present inventor succeeded in obtaining the ink holding device for the above-mentioned writing instrument by making the ink holding body of the ink holding device a specific structure, and completed the present invention. Was reached.

That is, an ink holding device for a writing instrument according to the present invention comprises a writing instrument main body having an ink chamber, a tip shaft having a holding portion provided at a tip of the writing instrument main body, and an ink holding body fitted in the tip shaft. A valve mechanism portion provided in the ink chamber opening, and a pen core that protrudes outward through the valve mechanism portion and is inserted and held in a holding portion in the leading shaft and an ink holding body. In the ink holding device of a writing instrument, which holds ink by the ink holding body, the ink holding body is composed of a tubular body, and at least one or more air is provided in a longitudinal direction of the inner circumferential portion of the tubular body. It is characterized in that it is provided with at least one holding projection for holding the pen core, as well as having a flow hole.

[0007]

[Action]

 In the ink holding device for a writing instrument according to the present invention, at least one or more holding projections provided in the longitudinal direction of the inner circumference of the ink holding body fitted in the tip shaft and the holding part in the tip shaft hold the pen core, and At least one or more air passage holes provided in the longitudinal direction inside the holding body provide good replacement of air and thus good ink outflow.

[0008]

【Example】

 Embodiments of the present invention will be described with reference to FIGS. 1 and 2, but the present invention is not limited to these embodiments.

1 and 2 show an example of an embodiment of the present invention. As shown in FIG. 1, an ink holding device 10 for a writing instrument of the present embodiment has a writing instrument main body 12 having an ink chamber 11, and a tip shaft having a holding portion 13a provided by screwing at the tip of the writing instrument main body 12. 13, a valve mechanism portion 14 provided in the opening of the ink chamber 11, a pen core 20, and an ink holder 30 fitted in the tip shaft 13.

The valve mechanism portion 14 includes a tubular valve seat body 15 sandwiched between the writing instrument main body 12 and the tip shaft 13, and a valve seat portion 16 provided on the tip side of the valve seat body 15. A valve rod 18 which is held by the holding portion 13a of the tip shaft 13 and is connected to the base end of the pen core 20 which projects outward, and the valve rod 18 is slidably inserted into the valve seat body 15, The base end side that bulges on the peripheral surface of the rod 18 is composed of a large-diameter tapered valve portion 18a and a spring 19 interposed between the base spring receiver 15a of the valve seat body 15, and the spring 19 springs. The valve portion 18a is always in contact with the valve seat portion 16 by the force.

As shown in FIG. 1, the pen core 20 protrudes outward through the valve mechanism portion 14 having the above-described configuration, and also has a holding portion 13 a provided in the leading shaft 13 and an inside of the leading shaft 13. The structure is such that it is inserted and held in the ink holder 30 that is fitted into.

As shown in FIGS. 1B and 2, the ink holder 30 is formed of a tubular body, and holds the pen core 20 at the entire length in the longitudinal direction of the inner peripheral portion of the tubular body. .., and four concave air circulation holes 32, 32 ... Between the respective holding projections 31, 31. The ink holder 30 is made of an elastic material such as sponge, and is a holding device for the ink as well as a holding device for the pen core 20. It also has a function as an occlusion body. Further, by setting the depth of the step portion of the holding projection 31 of the ink holding body 30 arbitrarily, the size of the concave air circulation hole 32, which becomes an influencing factor of the outflow of ink, is determined.

As shown in FIGS. 1B and 2, the ink holding device 10 of the writing instrument according to the present embodiment having the above-described configuration has an ink holding body 30 that is fitted in the front shaft 13 and has a cylindrical shape. , And the holding portion 13a of the tip shaft 13 holds the pen core 20 and is formed between the holding protrusions 31 and 31. Due to the different air circulation holes 32, 32, the replacement of air becomes good, and therefore the outflow of ink becomes good. In the writing instrument of this embodiment, the valve portion 18a moves in the writing pressure direction against the elastic force of the spring 19 depending on the writing pressure, and the ink amount passes from the ink chamber 11 to the valve seat portion 16 in accordance with the gap. The pen core 20 is impregnated through the ink holder 30 to be used for writing.

The outer diameter of the ink holder 30 is slightly larger than the inner diameter of the tip shaft 13 and is set to 1.00 to 1.30 times, preferably 1.00 to 1.15 times. Further, the inner diameter of the ink holder 30 is set slightly smaller than the outer diameter of the pen core 20 and is set to 1.00 to 0.80 times, preferably 1.00 to 0.95 times. Further, when the length of the pen core 20 in the longitudinal direction is m and the length of the ink carrier 30 in the longitudinal direction is n, n is in the range of 0.3 m ≦ n ≦ 0.7 m, and When the length in the longitudinal direction for holding the pen core 20 from the beginning is k, k is preferably set in the range of 0.3n≤k≤n. The retention of the core 20 and the outflow of ink are further improved.

The ink holding device of the writing instrument of the present invention is configured and used as described above, but is not limited to the above-mentioned embodiment, and various types are possible within a range not changing the gist of the present invention. The design can be changed to the above mode. For example, in the above-described embodiment, the ink holding body 30 is formed by forming the holding projections 31, 31, ... And the air circulation holes 32, 32 .. It may be formed by a method. The shape of the pen core 20 is not particularly limited as long as it can securely hold the pen core 20, and may be, for example, wavy projections, and the number thereof may be one or more. . Further, the shape of the air circulation holes 32 is not particularly limited, and may be, for example, a semicircular shape, a three-month shape, or the like, and the number thereof may be one or more. In addition to the paint marker, a writing tool such as a felt-tip pen or a writing pen may be used as long as it is an ink holding device for a writing tool having the above-mentioned configuration.

Further, if the present invention is an ink holding device for a writing instrument having the above-mentioned configuration, what is the structure and shape of the other writing instrument main body, or the structure and shape of the valve mechanism, and the parts and the like incorporated in the writing instrument. It is not limited.

[0017]

[Effect of device]

 According to the present invention, the ink holder fitted in the tip shaft is formed of a tubular body, and the holding protrusion of the longitudinal direction of the tubular body and the holding portion of the tip shaft securely hold the pen core. Therefore, it is possible to prevent the pen core from coming out during assembly, or the pen core from coming out during agitation during use, and the air circulation hole provided in the longitudinal direction of the inner peripheral portion of the cylindrical body. Thus, an ink holding device for a writing instrument is provided, in which the outflow of ink is good, and therefore, the working efficiency is improved and a good writing state is obtained. In addition, the ink holding device of the writing instrument of the present invention has the advantage that the performance can be greatly improved and the assembling work can be performed in the same manner as the conventional one only by making the conventional ink holding body have a specific structure.

[Brief description of drawings]

FIG. 1 shows an example of the implementation of the present invention, (a)
Is a partial sectional view thereof, and (b) is a sectional view taken along the line aa of (a).

FIG. 2 is a perspective view showing an example of an ink holder used in the present invention.

FIG. 3 is a cross-sectional view showing an example of a conventional ink holding device for a writing instrument.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Ink holding device 11 Ink chamber 12 Writing instrument main body 13 Tip shaft 13a Holding part 14 Valve mechanism part 20 Pen core 30 Ink holding body 31 Holding protrusion 32 Air circulation hole

Claims (1)

[Scope of utility model registration request] 1. A writing instrument main body having an ink chamber, a tip shaft having a holding portion provided at a tip of the writing instrument main body, an ink holder fitted in the tip shaft, and the ink chamber opening portion. And a pen core inserted into and held by the holding portion in the leading shaft and the ink holding body while holding the ink by the ink holding body. In the ink holding device for a writing instrument, the ink holding body is composed of a tubular body, and at least one or more air circulation holes are provided in the longitudinal direction of the tubular body inner peripheral portion and hold the pen core. An ink holding device for a writing instrument, comprising at least one or more holding protrusions.