Valve-type liquid extrusion device

Abstract

To provide a valve type marker and other valve type liquid material exuding tools capable of easily and quickly assembling a valve holder to a liquid material tank shaft.SOLUTION: The upper end of a liquid material tank shaft 1 is reduced in diameter and a locking ring 6 is formed on its outer surface, and a locking piece 7 facing inward is formed on the lower end surface of a valve holder 2. As the valve holder 2 is fitted onto the tip of the liquid material tank shaft 1, the locking piece 7 is pushed upward by the locking ring 6 and is further pushed past the locking ring, thereby being locked into the locking ring 6.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a valve-type liquid material exuding device, and more specifically, to a valve-type liquid material exuding device that can be applied to writing instruments such as direct-flow markers equipped with a valve mechanism, or to cosmetic tools, medical tools, and other liquid application tools, and that can store a sufficient amount of liquid material such as ink, cosmetic liquid, liquid chemicals, paint, etc., and allow it to permeate the tip as needed for writing or application. [Background technology]

[0002] Writing implements such as markers can be broadly divided into two types: the batting type, in which the barrel is filled with batting that is saturated with ink, and the direct-fill type (raw ink type), in which the ink is directly injected into the barrel. With the batting type, once the tip of the lead dries out, it takes time for the ink to soak in enough to make it possible to write again, and if you write quickly, the ink cannot soak in quickly enough to keep up, causing the written characters to smudge. In recent years, therefore, the direct-fill type, which does not have these drawbacks, has become mainstream.

[0003] In the case of direct ink types, there is a risk that excessive ink will seep into the core, causing the so-called ink dripping phenomenon, so many markers use a valve type in which the ink soaks into the core via a valve mechanism that is opened by pushing the core in. In the case of these conventional valve type markers, the assembly of the valve holder, which houses the valve mechanism to which the core is attached, and the liquid material tank shaft is generally done by screwing, and adhesive is applied to the threaded parts to prevent disassembly. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2008-6668 A [Patent Document 2] JP 2008-87422 A [Patent Document 3] JP 2005-342950 A Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, in the case of conventional valve-type markers, the valve holder is attached to the liquid material tank shaft by screwing, and an adhesive is applied to the threaded portion to prevent disassembly, which results in a problem of increased manufacturing time and effort. The present invention has been made to solve such problems, and it is an object of the present invention to provide a valve-type marker and other valve-type liquid material exuding devices in which the valve holder can be attached to the liquid material tank shaft easily and quickly. [Means for solving the problem]

[0006] The invention described in claim 1 for solving the above problem comprises a liquid material tank shaft, a valve holder fitted to the tip of the liquid material tank shaft, a valve unit mounted from the tip of the liquid material tank shaft to the valve holder, a core fixed to the valve unit and protruding from the valve holder, and a cap attached to the valve holder, The upper end of the liquid material tank shaft is reduced in diameter and a locking ring is formed on its outer circumferential surface, and a locking piece facing inward is formed on the lower end surface of the valve holder, and as the valve holder is fitted onto the tip of the liquid material tank shaft, the locking piece is pressed upward by the locking ring and is further pressed past the locking ring, thereby being locked by the locking ring. The locking piece has a hinge structure with a thin base. The present invention relates to a valve-type liquid material exuding device.

[0008] In one embodiment, eight of the locking pieces are provided. Effect of the Invention

[0009] Because the valve-type liquid material seepage device of the present invention has the above-mentioned configuration, the valve holder can be easily and quickly assembled onto the liquid material tank shaft by simply pushing it in, without the need for screwing or applying adhesive, thereby reducing the manufacturing effort and cost. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a valve-type liquid material exuding device according to the present invention with a cap removed. [Diagram 2] 1 is a cross-sectional view of a main portion of a valve-type liquid material exuding device according to the present invention. [Diagram 3] 1A to 1C are a partial cross-sectional front view, a side view, a cross-sectional view along line CC, and a detailed view of part D, showing the configuration of a valve holder of a valve-type liquid material seeping device according to the present invention. [Figure 4] 11A to 11C are diagrams showing the operation of assembling the valve-type liquid material exuding device according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The following description will be given in more detail with reference to the accompanying drawings, in which the embodiment of the present invention is described. Note that the following description is mainly based on the assumption that the valve-type liquid material exuding device according to the present invention is a valve-type writing instrument, but the configuration and effects are essentially the same when the valve-type liquid material exuding device is applied to cosmetic instruments, medical instruments, and various other types of liquid application instruments other than writing instruments.

[0012] As shown in Fig. 1, the writing implement according to the present invention is composed of a liquid material tank shaft 1, a valve holder 2 fitted to the tip of the liquid material tank shaft 1, a valve unit 3 mounted from the tip of the liquid material tank shaft 1 to the valve holder 2, a lead 4 fixed to the valve unit 3 and having a tip protruding from the valve holder 2, and a cap 5 attached to the valve holder 2. In the following description, the lead 4 side (left side in Figs. 1 and 2) is referred to as the tip side or upper side, and the opposite side is referred to as the rear end side or lower side (bottom side).

[0013] The upper end of the liquid material tank shaft 1 is reduced in diameter, and a locking ring 6 is formed on its outer circumferential surface. The locking ring 6 is usually continuous, but may be discontinuous. The upper edge of the locking ring 6 is curved. The valve holder 2 is formed in the order of a small diameter section 2a, a medium diameter section 2b, and a large diameter section 2c from the tip side, and a locking piece 7 facing inward is formed at the lower end of the inner circumferential surface of the large diameter section 2c (see FIG. 3). The locking piece 7 is divided into multiple pieces, and each is formed at the lower end of the large diameter section 2c in a hinged state by thinning the base, so that it can be bent from a horizontal state to a vertical state (see FIG. 4). The diameter of the circular space (see FIG. 3(C)) formed by the front end surface 7a of the locking piece 7 is set to be slightly smaller than the outer diameter of the reduced upper end of the liquid material tank shaft 1 (see FIG. 4).

[0014] The valve holder 2 is fitted to the upper end 1a of the liquid material tank shaft 1 with the valve unit assembled as described later. The locking piece 7 faces inward horizontally before assembly (see FIG. 3), but when it is advanced toward the upper end 1a of the liquid material tank shaft 1 during fitting, its front end hits the upper end 1a and is pushed up and tilted, and in that state it slides against the circumferential surface of the upper end 1a (FIG. 4(A)). When it is further pushed in in that state, the base side edge 7b of the locking piece 7 hits the upper curved edge part of the locking ring 6, and the locking piece 7 is further folded back (FIG. 4(B)), and slides against the outer circumferential surface of the locking ring 6, becoming vertical. When it is further pushed in in that state, the locking piece 7 climbs over the locking ring 6 and escapes to the back side of the locking ring 6 due to its restoring force. Thus, the locking piece 7 comes into contact with the rear surface of the locking ring 6 and is locked (FIG. 4(C)), so that the valve holder 2 cannot be removed from the liquid material tank shaft 1 thereafter.

[0015] Thus, in the case of the valve type liquid material exuding device according to the present invention, the valve holder 2 can be attached to the liquid material tank shaft 1 simply by pushing the valve holder 2 into the liquid material tank shaft 1 until its locking piece 7 passes the locking ring 6, making it possible to perform the assembly work easily and quickly, thereby reducing manufacturing costs. Furthermore, the locking piece 7 is locked into the locking ring 6 during assembly, making it impossible to remove the valve holder 2 from the liquid material tank shaft 1, eliminating the need to apply adhesive.

[0016] A number of lead support ribs 8 extending in the axial direction are formed at equal intervals on the inner peripheral surface of the small diameter section 2a of the valve holder 2. The lead 4 is supported so that it can slide along these lead support ribs 8. Within the valve holder 2 are a valve unit and an ink storage member 9 which stores ink supplied from the liquid material tank shaft 1 via the valve unit and impregnates the lead 4. The ink storage member 9 is a cylinder with a lead insertion hole formed through the center, and the lead 4 is slidably inserted into this lead insertion hole.

[0017] The valve unit is housed within a valve unit case 11 and comprises a valve body 12, a return spring 13 which surrounds the lower half of the valve body 12 and constantly urges the valve body 12 upward, and a plug member 14 which is fitted into the upper opening of the valve unit case 11. An ink inlet facing the lower end of the valve body 12 is opened at the lower end of the valve unit case 11, from which ink constantly flows into the valve unit case 11. A tapered surface 16 which serves as a valve seat abutment is formed in a conical shape at the center of the valve body 12, and the return spring 13 abuts against the back surface of this tapered surface, constantly urging the valve body 12 upward.

[0018] The plug member 14 is composed of a cylindrical section with an open bottom that fits into the valve unit case 11, and a flange formed at the upper end of the cylindrical section, and the upper tapered surface 16 of the valve body 12, which has the core 4 fixed to its tip, enters the plug member 14 from the bottom opening. The edge of the bottom opening of the plug member 14 serves as a valve seat and receives the tapered surface 16. The flange of the plug member 14 is held between the flange section formed at the upper end of the valve unit case 11 and the step between the medium diameter section 2b and the large diameter section 2c of the valve holder 2, and receives the ink storage member 9.

[0019] When there is no load, the valve body 12 is constantly pushed up by the return spring 13, and its tapered surface 16 abuts against the edge of the bottom opening of the plug member 14 to keep the bottom opening closed (the state shown in FIG. 2). When the core 4 is pushed in against the upward force of the return spring 13 and the valve body 12 is pushed in through the core 4, the tapered surface 16 moves away from the edge of the bottom opening of the plug member 14, opening this area and allowing the ink stored in the valve unit case 11 to be introduced into the core 4. Thus, the ink storage member 9 becomes sufficiently saturated with ink, allowing the ink to permeate the core 4.

[0020] Furthermore, by pointing the core 4 downward, the ink in the liquid material tank shaft 1 flows under its own weight into the valve unit case 11 through the opening in the bottom of the valve unit case 11, filling it. The ink that flows into the valve unit case 11 remains there until the core 4 is pushed into the valve holder 2 and the valve body 12 opens, and when the core 4 is pushed into the valve holder 2 and the valve body 12 opens, the ink flows into the plug member 14 and moistens the ink storage member 9.

[0021] The above-mentioned valve unit mechanism is merely an example, and is not limited thereto, and other mechanisms may be used. Also, the above description is for the case where the valve-type liquid material exuding device according to the present invention is applied to a valve-type writing instrument, but as described above, even when the device is applied to a cosmetic instrument, medical instrument, or various other liquid application instruments other than a writing instrument, the configuration and effects are similar to those of the writing instrument, so detailed descriptions thereof will be omitted. [Industrial Applicability]

[0022] Because the valve-type liquid material seepage device of the present invention has the above-mentioned configuration, the valve holder can be easily and quickly assembled onto the liquid material tank shaft by simply pushing it in, without the need for screwing or applying adhesive, which has the effect of reducing manufacturing effort and costs and has great industrial applicability. [Explanation of symbols]

[0023] 1 Liquid material tank shaft 2 Valve holder 3 Valve Unit 4-core 6 Locking ring 7 Locking piece

Claims

1. The liquid material tank includes a liquid material tank shaft, a valve holder fitted to a tip of the liquid material tank shaft, a valve unit installed from the tip of the liquid material tank shaft to the valve holder, a core fixed to the valve unit and protruding from the valve holder, and a cap attached to the valve holder, A valve-type liquid material seepage device characterized in that the upper end of the liquid material tank shaft is reduced in diameter and a locking ring is formed on its outer surface, and a locking piece facing inward is formed on the lower end surface of the valve holder, and as the valve holder is fitted onto the tip of the liquid material tank shaft, the locking piece is pushed upward by the locking ring and is further pushed past the locking ring, thereby locking into the locking ring, and the locking piece has a hinge structure with a thinned base.

2. The valve type liquid material exuding device according to claim 1, wherein eight of said locking pieces are provided.

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