JP2017071102A - Valve type liquid material exudation tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve type liquid material exudation tool which can quickly perform exudation of liquid material to a core without frequently performing pushing operation of the core and does not cause writing letters, coating liquid part or the like to get blurred even in the case of use mode such as high-speed writing or high-speed liquid coating.SOLUTION: A core 4 comprising a fine diameter part and a thick diameter part is provided, a core support part 2a which supports the fine diameter part 4a of the core slidably on a tip part of a valve storage cylinder 2 is provided, an annular space between an inner end surface b of the core support part and a head surface of a liquid material storage member 6 is set as an auxiliary liquid reservoir part 23, a liquid passage gap 24 is produced between a circumferential surface of the fine diameter part 4a and an inlet circumferential surface of a core insertion hole 8 in accordance with penetration into the core insertion hole 8 of a part of the fine diameter part 4a when the core is pushed-in and liquid material in the liquid material storage member 6 passes through the liquid passage gap 24 and is stored in the auxiliary liquid reservoir part 23.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a valve-type liquid material exuding tool member, and more specifically, to a writing instrument such as a direct liquid type marker provided with a valve mechanism, a cosmetic tool, a medical tool, or various coating liquid tools. Applicable valve-type liquid material exuding tool that can store a sufficient amount of liquid material such as ink, cosmetic liquid, liquid chemical, paint, etc. It is about.

  Writing tools such as markers are roughly classified into a batting type in which a batting with ink impregnated in the shaft is loaded and a direct liquid type (raw ink type) in which ink is directly injected into the shaft. As a conventional marker, there were many batting type, but in the case of the batting type, once the nib is dry, it takes time for the ink to soak into the writable state again, and when writing quickly, There is a drawback that the written letters are drawn because the ink penetration cannot catch up.

  On the other hand, in the case of the direct liquid type, since the core is in direct contact with the ink stored in the liquid material tank shaft and the ink soaks quickly, the ink does not dry out and the ink is written quickly. In recent years, the direct liquid type has become the mainstream because the soaking of the ink follows this, so that the written characters are not drawn.

  By the way, in the case of the direct liquid type, the ink oozes out excessively to the core and a so-called ink drop phenomenon may occur, so the ink is applied to the core via a valve mechanism that is opened by pushing the core. There are many valve type soaking. However, even in that case, the air in the shaft thermally expands to hold the liquid material tank shaft during writing, or the pressure in the shaft rises due to the gripping pressure or atmospheric pressure, so that the core There is a risk that the ink will ooze out and the ink will drop off. Therefore, conventionally, a method has been employed in which an absorption ring made of a foamed resin is fitted to the inner end of the core, and excess ink is absorbed by the absorption ring to avoid ink drop.

  However, in the case of this conventional valve type mechanism using an absorption ring, since the portion of the core that contacts the ink is only the inner end portion, the core is easily dried and writing curl is likely to occur. For this reason, there is an inconvenience that the valve opening operation by pushing in the lead must be frequently performed. Further, since the lead pushing operation is frequently performed, the tip of the lead is easily damaged, and there is a problem that even if a large amount of ink remains, it cannot be used. Such a problem occurs not only in writing instruments but also in various cosmetic tools and medical tools that are used by leaching a liquid material to the tip of the core, or in liquid coating tools such as liquid paints and liquid adhesives.

  In order to solve this problem, the applicant of the present application has made it possible to prevent the core from drying by allowing many parts of the core to be in constant contact with the stored liquid material. There is no need to perform frequent opening operations, there is no early damage to the nibs due to frequent operations, and liquid can penetrate quickly into the nibs. In the case of usage such as a coating liquid, a valve-type liquid material exuding tool is proposed in which written characters, a coating liquid portion, and the like are not distorted (Japanese Patent Laid-Open No. 2015-42483).

  In the case of the valve-type liquid material exuding tool according to this proposal, the lower half of the core accommodated in the core holding hole directly faces the core holding hole for storing the liquid material, the storage space, and the narrow space directly. Since the liquid material can be absorbed at all times, the lead is reliably prevented from being dried, so that it is not necessary to frequently open the valve by pushing the lead, and the operation is frequently performed. In the use mode such as high-speed writing and high-speed coating liquid, the penetrating of the liquid material into the core is quick, so that the written letter or the coating can be prevented. The effect that no dripping occurs in the liquid part is recognized.

  However, in the case of the valve-type liquid material exuding tool according to this proposal, since the liquid material is oozed into the core only in a portion that is contained in the liquid material storage member of the core, the type of the liquid material, that is, Depending on the liquid materials having different viscosities, the amount of the soaking may not necessarily be sufficient.

JP 2008-6668 A JP 2008-87422 A JP 2008-155484 A Utility Model Registration No. 2594306 JP2015-42483A

  As described above, in the case of the conventionally proposed valve-type liquid material exuding tool, since the liquid material oozes into the core of the liquid material storage member only, the liquid material Depending on the type, there is a problem that the amount of soaking may not be sufficient.

  Therefore, the present invention makes it possible to contact the liquid material with a larger portion of the core than in the case of the conventional valve-type liquid material exuding tool, thereby preventing the core from drying and pushing the core in. It is not necessary to frequently open the valve by the, there is no early damage of the tip due to frequent operation, and the liquid material can quickly penetrate into the core, and it is fast. It is an object of the present invention to provide a valve-type liquid material exuding tool in which written characters, a coating liquid portion, and the like are not drowned even in a usage mode such as writing or high-speed coating liquid.

The invention described in claim 1 for solving the above-mentioned problems is a liquid material tank shaft, a valve housing cylinder attached to the tip of the liquid material tank shaft, and a valve fitted in the valve housing cylinder. It consists of a unit case and a liquid material storage member, and a core having a small diameter part and a large diameter part across a step provided in the intermediate part,
A tip support portion that slidably supports the small-diameter portion of the lead is provided at a tip portion of the valve housing cylinder, and is provided between an inner end surface of the lead support portion and a head surface of the liquid material storage member. The annular space is the auxiliary liquid reservoir,
The liquid material storage member has a cone shape with a top portion removed, and a core insertion hole for slidably inserting the large diameter portion of the core is formed so as to penetrate the center from the head surface. In addition, a large number of slits for storing the liquid material are formed radially from the core insertion hole,
The valve unit case has a head surface abutting against a bottom surface of the liquid material storage member, and a bottom surface opening of the liquid material flow hole through which the liquid material in the liquid material tank shaft is constantly introduced into the valve unit case. Closed by a lid member having
The valve mechanism loaded in the valve unit case opens when the core is pushed in, and causes the liquid material that has flowed into the valve unit case to flow into the respective slits of the liquid material storage member, The liquid material that has flowed into each slit is stored there and can penetrate into the large diameter portion of the core,
Further, when the core is pushed in, as a part of the small diameter portion of the core enters into the core insertion hole, the peripheral surface of the small diameter portion and the inlet peripheral surface of the core insertion hole A liquid passage gap is generated between the liquid material storage member and the liquid material in the liquid material storage member is stored in the auxiliary liquid reservoir through the liquid passage gap and is stored in the auxiliary liquid reservoir. The valve-type liquid material exuding tool is characterized in that the liquid material can permeate into the small diameter part and the large diameter part of the core.

  In one embodiment, the diameter difference between the small diameter portion and the large diameter portion of the core is within a range of 0.4 to 0.6 mm, and the bottom surface of the liquid material storage member is recessed in a tapered shape. Thus, a liquid material storage portion communicating with the core insertion hole and each of the slits is formed between the contact surfaces of the liquid material storage member and the valve unit case. As the liquid material, an ink having a surface tension of 20 to 35 mN · m and a viscosity of 5 to 15 mPa · s is used.

  The valve-type liquid material exuding tool according to the present invention is as described above, and the inner end surface of the core support portion and the liquid material that slidably support the small-diameter portion of the core formed at the distal end portion of the valve housing cylinder An annular space between the head surface of the storage member is used as an auxiliary liquid reservoir, and when the core is pushed in, a part of the small diameter portion of the core enters the core insertion hole. A liquid passage gap is generated between the surface and the inlet peripheral surface of the core insertion hole, and the liquid material in the narrow gap of the liquid material storage member is stored in the auxiliary liquid reservoir through the liquid passage gap.

  Thus, since the liquid material permeates into the small diameter portion and the large diameter portion in contact with the auxiliary liquid reservoir, the liquid material permeates into the core sufficiently and quickly, so that high speed writing and There is an effect that the written characters and the coating liquid portion are prevented from drowning in the case of use such as a high-speed coating liquid.

  In addition, according to the valve-type liquid material exuding tool according to the present invention, since the drying of the lead is reliably prevented, it is not necessary to frequently perform the opening operation of the valve by pushing the lead, and the operation is frequently performed. There is an effect that it is possible to prevent early damage to the lead due to the.

It is a partial fracture front view of one embodiment of a valve type liquid material exuding tool concerning the present invention. It is a principal part longitudinal cross-sectional view of one Embodiment of the valve | bulb type liquid material exuding tool which concerns on this invention (at the time of non-pushing). It is a principal part longitudinal cross-sectional view of one Embodiment of the valve | bulb type liquid material exuding tool which concerns on this invention (at the time of core pushing). It is a principal part cross-sectional enlarged view of one Embodiment of the valve | bulb type liquid material exuding tool which concerns on this invention (at the time of core pushing). FIG. 3 is an enlarged sectional view taken along line AA in FIG. 2. It is a longitudinal cross-sectional view of the liquid material storage member cut | disconnected by the BB line and CC line in FIG.

  DESCRIPTION OF EMBODIMENTS Embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In addition, the following description is a case where the valve-type liquid material exuding tool according to the present invention is applied to a valve-type writing instrument, but in the case where it is applied to a cosmetic tool other than the writing tool, a medical tool, and other various liquid tools. However, its configuration and operational effects are basically unchanged.

  FIG. 1 is a partially cutaway front view of an embodiment of a valve-type liquid material exuding tool according to the present invention, and FIG. 2 is a longitudinal sectional view when the core is not pushed in (except for the cap 3 and the liquid material tank shaft 1). 3 is a longitudinal sectional view (same as above) when the lead is pushed in. As shown in FIG. 3, the valve-type liquid material exuding tool is fitted to the tip of the liquid material tank shaft 1. 2, a liquid material storage member 6 and a valve unit case 7 loaded in the valve housing cylinder 2, a core 4 supported by the liquid material storage member 6 and the tip of the valve housing cylinder 2, and a valve unit case 7 and a cap mechanism 3 that is fitted to the tip of the valve housing cylinder 2.

  The core 4 has a step 5 formed at the center, with the tip side being a small diameter portion 4a and the rear end side being a large diameter portion 4b. The difference in diameter between the small diameter portion 4a and the large diameter portion 4b is preferably in the range of 0.4 to 0.6 mm. By making the diameter difference within this range, the amount of ink impregnation into the small diameter portion 4a can be made moderate. In the following description, the core 4 side (left side in FIG. 1) is the front end side or the upper surface side, and the opposite side is the rear end side or the lower surface side (bottom surface side).

  The liquid material storage member 6 has a cone shape (conical shape) with the top portion removed, and a core insertion hole 8 is formed so as to penetrate the center, and a large number for storing ink radially from the core insertion hole 8. The slit 9 is formed (see FIGS. 5 and 6). The large-diameter portion 4b of the core 4 is slidably inserted into the core insertion hole 8 (see FIGS. 2 and 3). A clearance of about 0.1 mm is secured between the inner peripheral surface of the core insertion hole 8 and the outer peripheral surface of the large diameter portion 4b of the core 4. Usually, the core insertion hole 8 has the same diameter over its entire length, but the inner part to the inner part may have a slightly larger diameter or may be tapered.

  In a preferred embodiment, since the bottom surface of the liquid material storage member 6 is an inwardly tapered surface toward the core insertion hole 8, a storage space 10 for storing ink is formed between the top surface of the valve unit case 7. It is formed. Usually, a plurality of protrusions for centering the core 4 in the core insertion hole 8 are formed on the inner peripheral surface of the inlet portion of the core insertion hole 8.

  The tip end side of the valve housing cylinder 2 is squeezed to form a core support portion 2a that slidably supports the small diameter portion 4a of the core 4. A plurality of ribs 2c are formed radially on the inner peripheral surface of the core support portion 2a, the narrow diameter portion 4a of the core 4 is centered by the rib 2c, and an air passage is formed along the peripheral surface of the small diameter portion 4a. Secured (see FIG. 4). The narrow diameter portion 4a of the core 4 passes through the inner end surface 2b of the core support portion 2a, and a clearance for ventilation is ensured between the inner peripheral surface of the through hole and the outer peripheral surface of the small diameter portion 4a. Moreover, although the large diameter part 4b of the core 4 penetrates the head surface of the liquid material storage member 6, a clearance for ventilation (for example, between the inner peripheral surface of the through hole and the outer peripheral surface of the large diameter part 4b) 0.1 mm) is secured.

  A stepped receiving portion 22 that receives the head surface of the liquid material storage member 6 is formed in a portion slightly behind the core support portion 2 a on the inner peripheral surface of the valve housing cylinder 2. When the head surface of the liquid material storage member 6 is received by the stepped receiving portion 22, an annular auxiliary liquid storage portion 23 is formed between the head surface of the liquid material storage member 6 and the inner end surface 2b of the core support portion 2a. It is formed.

  The valve unit case 7 with the built-in valve mechanism is disposed on the back side so as to contact the liquid material storage member 6. The valve unit case 7 has an upper surface opening 11 and a bottom surface opening 12, and a valve body 14 for opening and closing the upper surface opening 11 and a valve body 14 are always attached to the upper surface opening 11 in the valve unit case 7. A return spring 15 is installed. The valve body 14 has a top shape, the tapered surface 16 serves as a valve seat contact portion, and the upper surface side protruding shaft 17 protruding from the tapered surface 16 protrudes from the upper surface opening 11 during assembly and faces into the core insertion hole 8. It contacts the end surface of the core 4.

  The valve body 14 is always pushed up by the return spring 15 when no load is applied, and the taper surface 16 abuts the valve seat on the inner edge of the upper surface opening 11 to close the upper surface opening 11 (see FIG. 2). When the lead 4 is pushed against the valve 4 and the valve body 14 is pushed by the lead 4, the tapered surface 16 is separated from the valve seat at the inner edge of the upper face opening 11 to open the upper face opening 11 (see FIG. 3). By opening the upper surface opening 11 in this way, the ink stored in the valve unit case 7 flows into the storage space 10 through the upper surface opening 11 and then flows into the slits 9 from there. Each slit 9 is filled.

  The bottom surface opening 12 of the valve unit case 7 is closed by a lid member 18 having a liquid material flow hole 19 for constantly introducing ink in the liquid material tank shaft 1 into the valve unit case 7. Usually, a plurality of liquid material flow holes 19 are formed so as to surround a support cylinder 20 formed at the center of the lid member 18. The return spring 15 is supported with its upper end surface in contact with the back surface of the valve body 14 and its lower end surface in contact with the lid member 18. Further, the lower surface side protruding shaft 21 of the valve body 14 is slidably inserted into the support cylinder 20 of the lid member 18.

  In the case of the valve-type liquid material exuding tool according to the present invention having the above-described configuration, the valve body 14 is pressed by the return spring 15 in a state where the core 4 shown in FIG. While the upper surface opening 11 is closed, the core 4 is pushed by the upper surface side projecting shaft 17, and the step 5 comes into contact with the inner end surface 2 b of the core support portion 21 (see FIG. 2). In this state, the ink filled in the storage space 10 and each slit 9 is located in the liquid material storage member 6 and has a large diameter of the core 4 that is in contact with each slit 9 in a wide range. The core 4 is impregnated with an appropriate ink by being impregnated directly into the portion 4b. At that time, since the upper surface opening 11 of the valve unit case 7 is closed by the valve body 14, excess ink does not flow into the storage space 10 and the respective slits 9, and the core 4 is not excessively impregnated. .

  When the lead 4 shown in FIG. 3 is pushed in, the valve body 14 is pushed in along with the push-in of the lead 4, thereby opening the upper surface opening 11 of the valve unit case 7 and filling the valve unit case 7. The ink that has been supplied flows into the slits 9 from the upper surface opening 11 through the storage spaces 10 and fills the storage spaces 10 and the slits 9.

  Further, when the core 4 is pushed, a part of the small diameter portion 4a enters the core insertion hole 8 through the auxiliary liquid reservoir 23, and the peripheral surface of the small diameter portion 4a and the inlet of the core insertion hole 8 are reached. A liquid passing gap 24 is generated between the peripheral surface and the peripheral surface (see FIG. 4), so that the ink in the narrow gap 9 is stored in the auxiliary liquid reservoir 23 through the liquid passing gap 24. Thus, the ink filling each slit 9 is not only from the large diameter portion 4 b of the core 4 but also from the portion facing the core insertion hole 8 of the small diameter portion 4 a and the portion contacting the auxiliary liquid reservoir 23. Will also soak directly. By acting in this way every time the lead 4 is pushed in, the small diameter portion 4a on the tip side is always in a moderately wet state, so even in the case of usage such as high speed writing and high speed coating liquid, No dripping occurs in the coating liquid part.

  In order to check the suitability of the ink used for the valve-type liquid material exuding tool according to the present invention, various inks having different surface tensions and viscosities were used, and a push number test until the writing became possible (the smaller the number of pushes, the better). went. Table 1 shows the test results. As is apparent from the results, the inks of Samples 8 to 18 having a surface tension of 20 to 35 mN · m and a viscosity of 5 to 15 mPa · s were pushed. It was possible to write in 2 or 3, and there was no dripping and it was judged appropriate. However, when the surface tension is close to 35 mN · m, the viscosity needs to be 10 mPa · s or less, and when the surface tension is close to 20 mN · m, the viscosity needs to be 5 mPa · s or more.

<Table 1>

  As described above, in the valve-type liquid material exuding tool according to the present invention, not only the large diameter portion 4b positioned in the liquid material storage member 6 of the core 4 but also the small diameter portion 4a on the tip side is pushed several times. Since the ink is immediately wetted by the operation, it is not necessary to frequently perform the opening operation of the valve by the push operation, and early damage to the lead due to the frequent operation is prevented. In addition, even when writing at high speed, the ink soaks up to the tip of the core so that writing characters are not easily drawn.

  As described above, the case where the valve-type liquid material exuding tool according to the present invention is applied to a valve-type writing instrument has been described. However, since the structure and the effect are based on the case of a writing instrument, the detailed description about them is abbreviate | omitted.

DESCRIPTION OF SYMBOLS 1 Liquid material tank shaft 2 Valve housing cylinder 2a Core support part 2b Inner end surface 2c Rib 3 Cap 4 Core 4a Thin diameter part 4b Large diameter part 5 Step 6 Liquid material storage member 7 Valve unit case 8 Core insertion hole 9 Narrow gap 10 Storage space 11 Upper surface opening 12 Bottom surface opening 14 Valve body 15 Return spring 17 Upper surface side protruding shaft 18 Lid member 19 Liquid material flow hole 20 Support cylinder 21 Lower surface side protruding shaft 22 Stepped receiving portion 23 Auxiliary liquid storage portion 24 Liquid flow gap

Claims (4)

A liquid material tank shaft, a valve housing cylinder attached to a tip of the liquid material tank shaft, a valve unit case and a liquid material storage member fitted in the valve housing cylinder, and a step provided in an intermediate portion. It consists of a core having a narrow diameter part and a large diameter part sandwiched between,
A tip support portion that slidably supports the small-diameter portion of the lead is provided at a tip portion of the valve housing cylinder, and is provided between an inner end surface of the lead support portion and a head surface of the liquid material storage member. The annular space is the auxiliary liquid reservoir,
The liquid material storage member has a cone shape with a top portion removed, and a core insertion hole for slidably inserting the large diameter portion of the core is formed so as to penetrate the center from the head surface. In addition, a large number of slits for storing the liquid material are formed radially from the core insertion hole,
The valve unit case has a head surface abutting against a bottom surface of the liquid material storage member, and a bottom surface opening of the liquid material flow hole through which the liquid material in the liquid material tank shaft is constantly introduced into the valve unit case. Closed by a lid member having
The valve mechanism loaded in the valve unit case opens when the core is pushed in, and causes the liquid material that has flowed into the valve unit case to flow into the respective slits of the liquid material storage member, The liquid material that has flowed into each slit is stored there and can penetrate into the large diameter portion of the core,
Further, when the core is pushed in, as a part of the small diameter portion of the core enters into the core insertion hole, the peripheral surface of the small diameter portion and the inlet peripheral surface of the core insertion hole A liquid passage gap is generated between the liquid material storage member and the liquid material in the liquid material storage member is stored in the auxiliary liquid reservoir through the liquid passage gap and is stored in the auxiliary liquid reservoir. A valve-type liquid material exuding tool characterized in that the liquid material can permeate into the small diameter part and the large diameter part of the core.   2. The valve-type liquid material exuding device according to claim 1, wherein a difference in diameter between the small diameter portion and the large diameter portion of the core is in a range of 0.4 to 0.6 mm.   By indenting the bottom surface of the liquid material storage member into a tapered shape, a liquid material storage portion that communicates with the core insertion hole and the slits between the contact surfaces of the liquid material storage member and the valve unit case. The valve-type liquid material exuding tool according to claim 1 or 2, wherein is formed.   The valve-type liquid material exuding tool according to any one of claims 1 to 3, wherein an ink having a surface tension of 20 to 35 mN · m and a viscosity of 5 to 15 mPa · s is used as the liquid material.

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