JPH0735081U - 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 1, a tip shaft 13 having a holding portion 13a provided at the tip of the writing instrument body 12, and an ink holder 3 fitted into the tip shaft 13.
0, and a valve mechanism unit 1 installed at the opening of the ink chamber 11
4, and outwardly protruding through the valve mechanism portion 14,
In the ink holding device 10 of a writing instrument, which includes a holding portion 13a in the tip shaft 13 and a pen core 20 inserted and held in the ink holding body 30, the ink holding body 30 holds ink in the ink holding body 30. The pen core 20 is held by the short diameter part inside the elliptical shape and the air flow hole 33 is held between the pen core 20 and the pen core 20 held in the long diameter part. To form.

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 having an elliptical shape inside, and the pen core is formed by a short diameter portion inside the elliptical shape. Is held, and an air circulation hole is formed in the long diameter portion between the pen and the held pen core.

[0007]

[Action]

 In the ink holding device of the writing instrument of the present invention, since the ink holding body to be fitted into the front shaft is composed of a tubular body having an elliptical inner part, the holding part inside the elliptical shape and inside the front shaft is held. Part holds the pen core, and an air circulation hole is formed in the long diameter part between the pen core and the held pen core, so that air replacement is good, and therefore ink outflow is good. .

[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 composed of a tubular body having an elliptical shape inside. The pen core 20 is held by the short diameter part 31 inside the elliptical shape of the ink holding body 30, and the long diameter part 32 is formed with an air circulation hole 33 between the pen core 20 and the held pen core 20. 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. In addition, the lengths of the short diameter portion 31 and the long diameter portion 32 inside the elliptical shape of the ink holder 30 are such that the size of the pen core 20 to be held and the outflow of ink formed between the pen core 20 to be held. The size is set in consideration of the size of the air circulation hole 33, which is an influencing factor of.

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 the ink holding body 30 fitted in the front shaft 13 that is elliptical inside. Since the pen core 20 is formed of a cylindrical body having a shape, the pen core 20 can be held by the short diameter portion 31 and the holding portion 13a of the tip shaft 13 inside the elliptical shape, and the pen core held by the long diameter portion 32. Since the air circulation holes 33, 33 are formed between them, the air replacement is favorable, and thus the ink outflow is favorable. 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. In addition, the inner diameter (the length of the minor axis portion) of the ink holder 30 is slightly smaller than the outer diameter of the pen core 20 and is 1.00 to 0.80 times, preferably 1.00 to 0. When the length of the pen core 20 in the longitudinal direction is m and the length of the ink holder 30 in the longitudinal direction is n, n is 0.3 m ≦ n ≦ 0. When the length in the longitudinal direction for holding the pen core 20 from the beginning is k, k is 0. It is preferable to set in the range of 3n ≦ k ≦ n, and when it is in this range, the holding of the pen core 20 and the outflow of the 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, as shown in FIGS. 1 (b) and 2, the ink holder 30 is not limited in its outer shape as long as it is composed of a tubular body having an elliptical inside. It is preferably cylindrical. In addition to the paint marker, a writing instrument such as a felt-tip pen and a writing pen may be used as long as it is an ink-jet holding device for a writing instrument 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, since the ink holder to be fitted into the tip shaft is composed of a cylindrical body having an elliptical shape inside, the pen core is securely held by the short diameter portion inside the ellipse and the holding portion of the tip shaft. The pen core can be prevented from falling out during assembly, or the pen core can be prevented from falling out during agitation during use. Since the air circulation hole is formed between the core and the lead, the ink holding device for the writing instrument is provided, which allows the ink to flow out favorably, thus improving the working efficiency and obtaining a good writing state. 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 body 13 Tip shaft 13a Holding part 14 Valve mechanism part 20 Pen core 30 Ink holding body 31 Short diameter part 32 Long diameter part 33 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 that protrudes outward through the valve mechanism portion and is inserted and held in the holding portion in the leading shaft and the ink holding body, and holds the ink in the ink holding body. In the ink holding device for a writing instrument, the ink holding body is composed of a tubular body having an elliptical shape inside, and the pen core is held by a short diameter portion inside the elliptical shape and is held by a long diameter portion. An ink holding device for a writing instrument, wherein an air circulation hole is formed between the pen core and the pen core.