JP4676134B2 - Self-sealing retractable writing instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a writing instrument, in particular, a self-sealing retractable writing instrument using a volatile ink such as a felt writing core and a marker.
[0002]
[Prior art]
The present invention relates to writing instruments filled with ink, commonly known as markers. As used herein, the term marker includes all writing instruments that tend to evaporate ink from the writing core. Some of the markers include, but are not limited to, felt writing cores, dry erasers, permanent and non-permanent markers, and children's markers.
[0003]
The marker has at least one end with a writing core for writing on the surface. The writing core is also called a nib. Inks are typically formulated with a dye and a solvent that dissolves the dye. These ink solvents are typically volatile and tend to evaporate when exposed to ambient air. When a sufficient amount of the ink solvent evaporates from the marker's writing core, the writing core dries out and the performance as a marker is significantly reduced.
[0004]
The problem of ink evaporation from the writing core is solved by putting a cap on the writing core when the marker is not used. However, one problem with using a cap is that the user often forgets to put on the cap or loses sight of the cap, such that the cap is not covered by the writing core after use, and the writing core dries out and shortens the life of the marker. That is.
[0005]
In order to overcome the problem of using a cap for the marker, some markers have a self-sealing cap integrated inside the marker writing tube. These markers each have problems with the design of self-sealing caps, are complex in construction, and do not work very well. One problem is that the writing core is isolated in a fairly wide air chamber when the writing instrument is not in use.
[0006]
If the air chamber is wide, a large amount of ink can still evaporate into the air chamber. Another problem is that when the writing core enters and exits the self-sealing cap, friction occurs between the self-sealing cap and the writing core, causing the self-sealing cap to deteriorate in quality regardless of the usage time. Furthermore, the assembly of the self-sealing cap is complicated and unsuitable for large volume manufacturing processes. Therefore, improvements are required for self-sealing writing instruments.
[0007]
[Problems to be solved by the invention]
In view of the above problems, the problem of the present invention is that the writing liquid is drawn from the writing core in the retracted state of the writing core. (evaporation) An object of the present invention is to provide a self-sealing retractable writing instrument.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the configuration of the present invention Is A writing cylinder (101) having a first opening (106) and movable between a retracted state and a drawn state, wherein the writing core (102) protrudes from the first opening (106) and is retracted. In the state, the writing core (102) is inside the writing cylinder (101), the cartridge (312) having an extension (318) to support the writing core (102), and the lip (600 , 1206, 1508) and the interior that seals around the extension (318) of the cartridge and the first end (302, 1202) Shape part A second end (304, 1204) comprising (702, 1300), the first end (302, 1202) being inside the writing cylinder and the first opening (106) of the writing cylinder In the retracted state of the writing core (102), the space between the first end (302) and the second end (304) is sealed from the outside air, and the writing core (102) is filled with the filling member (300) at the extraction position A filling member (300, 1200, 1500) projecting through the lip and the first opening of the writing cylinder, and a clamping end (1004, 1402, 1506), A clip (301, 1400, 1502) having a support rim (1000, 1304), The holding end portion exerts a compressive force on the lip (600, 1206, 1508), and the lip (600, 1206, 1508) in the retracted state. The Sealing and the support rim (1000, 1304) is adapted to support the second end (304) of the filling member (300) Have It is characterized by that.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a retractable writing instrument that prevents evaporation of writing liquid from the writing core when the writing core is in the retracted state. The retractable writing instrument includes a front shaft cylinder having a front opening so that the writing core can enter and leave the front opening. A filling member that seals the writing core from outside air in a retracted state of the writing core is disposed inside the front shaft cylinder adjacent to the front opening. The writing instrument also comprises a rear barrel having a rear opening. A plunger for moving the plunger back and forth in the axial direction is disposed inside the rear opening. When the plunger is clicked, for example, the writing core projects or retracts to the filling member and the front opening. The writing fluid is stored in the feeder. A nib is disposed between the feeder and the writing core, and supplies the writing liquid of the feeder to the writing core. The nib is either integrated with the writing core or a separate part. At least a part of the feeder protrudes into the plunger through the rear opening and stores more writing liquid while reducing the size occupied by the feeder.
[0010]
The filling member includes a first end and a second end, and the first end is opened to cause the writing core to protrude from the first end. To open the first end, the first end is provided with a lip with a slit. In addition, the clip is configured to apply a compressive force to the lip to help seal the lip in the retracted state. The second end portion has an internal shape that seals the second end portion of the filling member, and further allows the top portion to enter and exit in the axial direction as the plunger moves. In the retracted state, the writing core is between the first end and the second end to seal the writing core from the outside air, thereby making the cap unnecessary.
[0011]
Since the filling member is made from a durable material, the lip will not wear out even if the writing core is repeatedly inserted and removed from the filling member. The material of the filling member is also impermeable to vapor and seals the writing core from the outside air. In this regard, the filler member is made from a thermoplastic ebonite (TPV) containing butyl rubber that is cross-linked with polypropylene.
[0012]
Other devices, methods, configurations and advantages of the present invention will become apparent from a review of the accompanying drawings and detailed description. A person skilled in the art Will become clear. The apparatus, methods, configurations and advantages of the present invention are included in the detailed description and are within the scope of the present invention, and should be protected by the following claims.
[0013]
The present invention will be understood with reference to the accompanying drawings. The components in the drawings are for explaining the principle of the present invention, and dimensions and the like are not necessarily important. Furthermore, the same reference numerals in the drawings are used for corresponding members throughout the drawings.
[0014]
【Example】
FIG. 1 shows a writing instrument 100 with the writing core in a drawn state. The writing instrument 100 includes a writing cylinder 101 including a first shaft cylinder 104 and a second shaft cylinder 108. In the pulled-out state, the writing core 102 of the writing instrument 100 is pulled out from the first shaft tube 104. The first shaft cylinder 104 includes a first opening 106 at the front end, and allows the writing core 102 to move between the drawn state and the drawn state. The second shaft cylinder 108 includes a second opening 110 at the rear end, and allows the plunger 112 to protrude between the drawn state and the drawn state. In the pulled-out state, the plunger 112 is pushed down with respect to the second shaft cylinder 108, and the writing core 102 is projected from the first shaft cylinder 104 through the first opening 106. In order to guide the writing core 102 to the first opening 106, the support member 115 covers the side surface or the periphery of the writing core 102. The first shaft cylinder 104 is directed toward the writing core 102 and the outer diameter of the writing cylinder 101 is reduced to form a first opening 106.
[0015]
FIG. 2 shows the writing instrument 100 with the writing core 102 retracted into the first barrel 104. In the retracted state, the plunger 112 further protrudes from the second shaft cylinder 108 and is retracted into the first shaft cylinder 104 by pulling the writing core 102 back to the first opening 106. Thus, when the plunger 112 moves between the retracted state and the pulled out state, the writing core 102 moves accordingly between the retracted state and the pulled out state. The writing cylinder 101 is integrally formed, and the internal mechanism of the writing instrument 100 is inserted into the writing cylinder 101 through the second opening 110, or the writing cylinder 101 is inserted into the writing cylinder 101 through other alternative mechanisms known to those skilled in the art. Is inserted.
[0016]
FIG. 3 shows an exploded view of the internal mechanism of the writing instrument 100. The writing instrument 100 has a filling member 300 engaged with the inside of the first shaft cylinder 104 adjacent to the first opening 106. The filling member 300 includes a first end 302 and a second end 304 that form a vapor chamber 306 inside the filling member 300. The steam chamber 306 is configured to receive the writing core 102 and substantially seal the writing core 102 from the outside air. In the drawn out state, the first end 302 of the filling member 300 is open to allow the writing core 102 to protrude through the first opening 106. In the retracted state, the first end 302 closes to substantially seal the writing core 102 from the outside air. The nib 308 is coupled to the writing core 102 in the longitudinal direction (axis) 310. The writing core 102 may be integrated with the nib 308 or a part separated from the nib 308.
[0017]
The writing instrument 100 includes a clip 301 that serves to close the first end 302 of the filling member 300. Clip 301 is configured to exert an elastic compressive force on first end 302. The filling member 300 has a clip 301 coupled to the outer surface. As described above, the clip 301 is disposed between the filling member 300 and the first shaft cylinder 104 and surrounds the second end portion 304 of the filling member 300. Further, the second end portion 304 of the filling member 300 includes a cutout of the clip 301, and the outer peripheral portion of the filling member 300 and the clip 301 forms a surface that contacts the inner wall of the writing cylinder 101.
[0018]
The writing instrument 100 includes a first cartridge 312 and is coupled to the second cartridge 314. The first and second cartridges 312 and 314 slide on the feeder 316. The feeder 316 stores the writing liquid supplied to the writing core 102 through the nib 308. The capillary relationship between the feeder 316, nib 308, and writing core 102 moves the writing fluid from the feeder 316 to the writing core 102. The first cartridge 312 includes an extension 318 having an opening 320 that is adapted to receive and seal the nib 308. In this configuration, the rear writing core 322 of the nib 308 contacts the feeder 316 and moves the writing liquid to the writing core 102. The first cartridge 312 includes a flange 324 that is combined with the second cartridge 314. The extension 318 of the first cartridge 312 is inserted into the resistance member 326 and supports the resistance member 326 between the second end 304 and the edge 325 of the first cartridge 312.
[0019]
The writing instrument 100 is provided with a meshing mechanism 328 for assembling the plunger 112 with the second shaft 108, and the plunger 112 is locked in a retracted state or a pulled out state. The meshing mechanism 328 is hollow so as to be inserted through the rear end of the second cartridge 314. A cylindrical portion (bore) 114 provided in the plunger 112 is adapted to receive at least one feeder 316 held inside the second cartridge 314. When the feeder 316 is incorporated into the plunger 112, the plunger 112 extends by the length of the feeder 316 and stores more writing liquid.
[0020]
FIG. 4 is a side cross-sectional view of the writing instrument 100 in the retracted state. In the retracted state, the writing core 102 is inside a steam chamber 306 having a first end 302 and is sealed from the outside air, and the second end 304 substantially seals around the extension 318. The writing core 102 protruding from the opening 320 is inside the steam chamber 306 and is substantially sealed from the outside air. The writing core 322 forms a contact state with the feeder 316, and the writing liquid stored in the feeder 316 flows to the writing core 102 through the nib 308. In the retracted state, even if the writing liquid evaporates from the writing core 102, the vapor is sealed in the vapor chamber 306. The volume of the vapor chamber 306 is minimized so as to limit the evaporation of the writing liquid.
[0021]
FIG. 5 is a side cross-sectional view of the writing instrument 100 in the drawn-out state. When the plunger 112 is pushed toward the second barrel 108 for writing, the first and second cartridges 312, 314, the nibs 308, and the writing core 102 move toward the first opening 106. . The resistance member 326 resists the pushing force until the meshing mechanism 328 engages with the plunger 112 and locks in the pulled-out state. When the writing core 102 is pressed against the first end portion 302, the slit of the first end portion 302 is opened to cause the writing core 102 to protrude from the first opening 106. When the writing core 102 is pulled out, the writing core 102 is ready to write on the writing surface.
[0022]
In the pulled-out state, the extension 318 of the first cartridge 312 protrudes from the first opening 106 along the writing core 102. The extension 318 serves to guide the writing core 102 through the first end 302 and the first opening 106 of the filling member 300. The extension 318 includes an air hole 307 that allows air to flow into the feeder 316 when the writing instrument 100 is in use. The air hole 307 includes a passage formed in the wall of the extension 318 or a passage formed between the inner wall of the extension 318 and the nib 308. When the air holes 307 are formed later, the size and shape of the air holes 307 vary depending on the shape of the outer wall of the nib 308.
[0023]
The extension 318 is configured such that the extension 318 is accommodated inside the resistance member 326. As shown in FIG. 4, in the retracted state, the resistance member 326 is in an uncompressed state. As shown in FIG. 5, the resistance member 326 is in a compressed state in the pulled out state. When the plunger 112 is driven between the retracted state and the retracted state, the resistance member 326 exerts an expanding force between the second end 304 of the filling member 300 and the edge 325 of the first cartridge 312. Then, the writing core 102 is moved inward or outward of the filling member 300.
[0024]
The plunger 112 and the resistance member 326 described above can be configured in various ways. For example, a torsion cam mechanism, a push button locking mechanism, a return mechanism known to those skilled in the art, and the like are used.
[0025]
6 and 7 are perspective views showing a first end 302 and a second end 304 of the filling member 300, respectively. The first and second ends 302, 304 may be integrally formed from an elastic material or may be formed as separate parts. The first end portion 302 includes a lip 600 having a slit 602, and when the writing core 102 is extracted from the filling member 300, the slit 602 is closed and opened. The extension 318 guides the writing core 102 to pass through the lip 600. As shown in FIG. 7, the lip 600 hermetically seals the vapor chamber 306 in the retracted state.
[0026]
Second end 304 has an annular outer shape (External shape part) 700. Outside Shape part The outer diameter of 700 is a dimension that contacts the inner wall of the writing cylinder 101 or the inner wall of the first shaft cylinder 104. That is, external Shape part Reference numeral 700 denotes an outer diameter such that the second end 304 seals the inner peripheral wall of the writing cylinder 101, but there may be a gap between the second end 304 and the writing cylinder 101. Inside second end 304 Shape part The inner diameter of 702 is configured such that the extension 318 slides in the longitudinal direction, that is, the front-rear direction. internal Shape part 702 may be dimensioned to hermetically seal around the extension 318 when the extension 318 slides in the longitudinal direction. This configuration serves to seal the vapor chamber 306 formed inside the filling member 300 from the outside air when the lip 600 is closed. Further, the air hole 307 is formed in the vicinity of the writing core 102, and the filling member 300 is configured to substantially seal the air hole 307 and the writing core 102 when the writing instrument 100 is retracted.
[0027]
Filling member 300 is configured to minimize the volume of vapor chamber 306. This configuration allows the second wall 704 to be external Shape part 700 to inside Shape part Achieving by tapering towards 702. To taper the second wall 704, the extension 318 is guided and sealed so that the volume of the vapor chamber 306 is minimized. Shape part 702 is defined.
[0028]
internal Shape part 702 is configured to minimize the resistance of the extension 318 when the extension 318 slides back and forth. internal Shape part 702 includes one or more edges 706, 708 separated by a recess to reduce the wall thickness of the second wall 704. Reducing the wall thickness of the second wall 704 by the edges 706, 708 Shape part Reduce friction between 702 and extension 318.
[0029]
FIG. 6 is a perspective view of the filling member 300 as viewed from the front. The filling member 300 is configured to have a taper whose outer diameter decreases from the second end 304 toward the lip 600. This configuration can minimize the volume of the vapor chamber 306. The taper of the filling member 300 makes the inner wall of the filling member 300 match the shape of the writing core 102 and the extension 318 to such an extent that the inner wall of the filling member 300 is not damaged when the writing instrument is retracted. The filling member 300 is tapered to form a lip 600 having a slit 602 so that the opening 602 opens when the writing core 102 protrudes.
[0030]
FIG. 8 is a cross-sectional view showing the internal mechanism and the periphery of the first shaft cylinder 104. When the extension portion 318 moves toward the pulled-out state, the open end portion 800 of the extension portion 318 first engages with the inner wall 802 of the filling member 300, and the writing core 102 opens the lip 600 and penetrates. Thus, the intact shape of the writing core 102 is maintained. The open end 800 is shaped like a bulge and helps the lip 600 to be further pushed open when the open end 800 engages the inner wall 802.
[0031]
FIG. 9 is a cross-sectional view showing the periphery of the first shaft cylinder 104 of another writing instrument in the retracted state. Here, when the writing core 102 further protrudes from the opening end 900 of the extension 318, the writing core 102 engages with the inner wall 802 of the filling member 300 and opens the lip 600. When the writing core 102 further protrudes in the drawn-out state, the open end 900 of the extension 318 engages with the lip 600 and holds the lip open. In the retracted state, the inside of the lip 600 and the second end 304 Shape part 702 is a small space that minimizes ink evaporation and substantially seals the writing core 102 from the outside air. That is, the steam chamber 306 is configured to seal the writing core 102 with a minimum volume. This is achieved by having a second end 304 adjacent to the end of the writing core 102 and a first end 302 adjacent to the front end of the writing core 102. Further, the second end 304 is internal Shape part It is tapered toward 702 and is dimensioned so that the distance between the first end and the second end is as small as possible. The inner wall 802 tapers from the second end 304 to the first end 302 to form a lip 600 so that the volume of the vapor chamber 306 is minimized.
[0032]
As described above, the filling member 300 is formed from one part or a plurality of parts. For example, outside the second end 304 Shape part 700 is coupled to the inner wall of the writing cylinder, and the first end 302 comprising the lip 600 is coupled to the writing cylinder adjacent to the first opening 106, and in the space between the first and second ends. A vapor chamber 306 is formed.
[0033]
10 and 11 are perspective views of the clip 301 viewed from the front and rear, respectively. The clip 301 includes a support rim 1000 and a pair of clamping arms 1002. Support rim 1000 is configured to receive second end 304 of filler member 300. The sandwiching arm 1002 is tapered toward the end 1004 and accommodates the filling member 300. The end 1004 is arranged to cover the lip 600 of the filling member 300 and exerts a compressive force on the lip 600 to help seal the lip 600. The clamping arm 1002 is made of a material (spring steel) that has fatigue resistance and stores a shape or posture. When the clamping arm 1002 presses the lip 600 in the retracted state, the clamping arm 1002 exerts a sufficient compressive force on the lip 600 to help substantially seal the lip 600. When the extension 318 engages the inner wall of the filling member 300 and opens the lip 600, the clamping arm 1002 at least partially releases the compressive force exerted on the lip 600, and the lip is Minimize friction between 600 and extension 318.
[0034]
FIG. 12 is a perspective view showing another filling member 1200 having a first end 1202 with a lip 1206 and a second end 1204. The filling member 1200 has indentations 1208 on both sides, and is adapted to receive a clip 1400 in the indentation 1208 as shown in FIG.
[0035]
FIG. 13 is a perspective view showing the second end 1204 of the filling member 1200. Second end 1204 is an interior that receives extension 318 through nib 308. Shape part 1300. When the writing core 102 moves between the retracted state and the pulled-out state, the extension 318 corresponds to the inside. Shape part It moves relative to the axial direction of 1300. internal Shape part 1300 substantially seals around the extension 318 during axial movement of the extension 318. internal Shape part 1300 includes an edge 1302 that is beveled to minimize friction between the second end 1204 and the extension 318. Instead of the above configuration, internal Shape part 1300 may include a rounded edge that minimizes friction with extension 318. Furthermore, a plurality of protrusions that engage with the recess 1208 may be provided on the inner wall of the first shaft cylinder 104 so that the filling member 1200 may be aligned with the first shaft cylinder when assembling the writing instrument.
[0036]
FIG. 14 is a perspective view of a clip 1400 for the filling member 1200. The clip 1400 is assembled so as to cover the filling member 1200, and the holding arm 1406 is engaged with a recess 1208 formed in the filling member 1200. The clip 1400 has a pair of end portions 1402 for crushing the lip 1206 and end portions 1404 for supporting the second end portion 1204 on both ends, and the writing core is in a retracted state and a pulled out state. When moving between, the filling member 1200 serves to maintain its posture. That is, the clip 1400 serves as the spine and the extension 318 is internal. Shape part When moving back and forth along the 1300 and the lip 1206, the posture of the filling member 1200 is maintained. The width of the end 1402 covers at least the width of the slit of the lip 1206 in FIG. 12 and seals the vapor generated in the vapor chamber of the filling member 1200 from escaping from the slit of the lip 1206. The clip 1400 includes a clamping arm 1406, and in the retracted state, the clamping arm 1406 exerts a sufficient compressive force on the lip 1206, but the open end of the writing core 102 or the extension 318 is engaged with the inner wall 802 of the filling member 1200. When combined, at least part of the compression force is configured to be released. Thus, the extension 318 and the interior Shape part Friction with the 702 is minimized and the force required to drive the plunger 112 is also reduced.
[0037]
FIG. 15 shows a filling member 1500 in which a clip 1502 is integrally formed. The clip 1502 may be formed from two U-shaped split pieces joined to the end 1504 of the filling member 1500. In the retracted state, the clip 1502 seals the lip 1508 of the filling member 1500 at the end 1506.
[0038]
FIG. 16 shows the writing core 102 that engages the lip 1508 and opens the lip 1508. When the writing core 102 further protrudes in the pulled-out state shown in FIG. 17, the extension 318 engages with the lip 1508 and keeps the lip 1508 open.
[0039]
FIG. 18 is an exploded perspective view showing another writing instrument 1800. In this embodiment, the writing instrument 1800 includes a plunger 1802, a feeder 1804, a writing core 1806, a cartridge 1808 having an extension 1809, a resistance member 1810, a filling member 1812, a clip 1814, and a writing cylinder 1816. To assemble, the writing core 1806 is inserted into the cartridge 1808 by the plunger 1802 and the feeder 1804, and the rear end of the cartridge 1808 is sealed. Next, the extension portion 1809 of the cartridge 1808 is inserted into the writing cylinder 1816 with the BR> 閨 A resistance member 1810, the filling member 1812, and the clip 1814.
[0040]
On the other hand, the clamping arm 1002 is coupled to the first shaft cylinder of the writing cylinder and engages with the lip of the filling member to help the lip seal. In addition, the internal mechanism mentioned above is manufactured in various dimensions suitable for non-writing tools for applying writing tools with different diameters or volatile liquids such as cosmetics and paints.
[0041]
FIG. 19 is an enlarged side sectional view showing the first cartridge 312. A main portion 1900 of the extension 318 includes a first section 1902, a second section 1904, and a third section 1906. The second compartment 1904 is disposed between the first compartment 1902 and the third compartment 1906. In the retracted state, the first compartment 1902 is inside the vapor chamber 306, the second compartment 1904 forms a seal with the first end 302, and the third compartment 1906 is behind the second end 304. It is in. The first compartment 1902 tapers toward the opening 320 along the longitudinal axis, making it easier for the first compartment 1902 to pass through the lip slit of the filling member. The second compartment 1904 is flat along the longitudinal axis and, in the retracted state, the interior of the second end 304 Shape part To form a seal. A second compartment 1904 is provided for each interior of the second end 304 to seal the perimeter. Shape part It is the same as or slightly larger than the inner diameters of 702 and 1300. The third section 1906 is tapered with an outer diameter increasing toward the opening 320 along the longitudinal axis, and when the third section 1906 is pushed into the second end 304, the third section 1906. Is reduced to minimize friction between the third compartment 1906 and the second end 304. In other words, this is the interior of the second end 304 Shape part Minimize wear.
[0042]
FIG. 19 shows a retracted state in which a recess 1908 is formed in the third compartment 1906 behind the first end 302 of the filling member 300 so as to control the release of steam generated in the steam chamber 306. Indicates that When the writing liquid evaporates through the writing core 102 in the retracted state, vapor is generated inside the vapor chamber 306. When the writing core 102 moves from the retracted state to the pulled-out state, the recess 1908 formed in the extension 318 slides into the second end portion 304, and the third section 1906 and the interior Shape part A gap is formed between them. This gap is formed in the second end 304 before the writing core 102 passes through the first end 302. Thus, the vapor inside the vapor chamber 306 is released through the rear gap or second end 304 rather than through the lip slit or first end 302 at the front end of the filling member 300. . This eliminates the problem that the vapor is ejected through the first opening 106 of the writing instrument 100 and creates a blot of ink on the writing surface.
[0043]
FIG. 20 is a front view showing the opening 320 formed in the first section 1902. The inner peripheral surface of the opening 320 is provided with at least one tooth 2000 that engages with the nib 308 so as to hold the writing core 102 in a predetermined state.
[0044]
FIG. 21 is an enlarged side view showing the writing core 102 and the nib 308. The writing core 102 includes an edge portion 2100 having a pitch angle so that the writing core 102 can easily penetrate the slit 602 of the lip 600. The teeth 2000 inside the opening 320 hold the writing core 102 and align the edge 2100 of the writing core 102 with the slit 602 of the lip 600. Since the filling member 300 and the edge 2100 are held so as to coincide with a predetermined position, the writing core 102 can repeatedly point out the slit 602 without damaging the slit 602. This ensures that the edge 2100 of the writing core 102 protrudes to a predetermined position on the first and second shaft cylinders. That is, the edge of the writing core 102 is prevented from rotating with respect to the first and second shaft cylinders. In an embodiment of a writing instrument having a clip in the second barrel, or symmetrical external shape, the writing core 102 that always protrudes into position can hold the writing instrument as intended by the user.
[0045]
Since the filling member 300 can be made of a durable and flexible material, the writing core 102 does not wear even if the slit 602 is pulled out many times. The material has low permeability to vapor and air, and can seal the writing core 102 from the outside air.
[0046]
From this point, the filling member can be formed of various materials such as silicon, ethyl rubber, and thermoplastic elastomer including thermoplastic rubber having low vapor permeability. Injection molding, blow molding, extrusion molding, and other various manufacturing methods known to those skilled in the art can be applied to mold the filling member using silicon. For the alcoholic writing liquid having a high evaporation rate, compression molding of a filling member with ethyl rubber or other methods known to those skilled in the art is used. Alternatively, the filler member may be molded from a thermoplastic elastomer that includes a thermoplastic rubber with low vapor permeability. Such a material is manufactured by Advanced Elastomer Systems SL, 38811 Akron South Main Street, Ohio, USA under the name of the registered trademark Trefsin, and various manufacturing methods such as injection molding, blow molding and extrusion molding. Thus, the filling member 300 can be formed.
[0047]
Although the present invention has been described based on several embodiments, all variations and modifications of the invention including applying or incorporating a seal mechanism to writing instruments having different dimensions and external shapes are limited by the claims and the invention. It belongs to the scope of permeate such as invention.
[0048]
【The invention's effect】
As described above, according to the present invention, the filling member includes the first end and the second end, and the first end is opened to cause the writing core to protrude from the first end. To open the first end, the first end is provided with a lip with a slit. In addition, the clip is configured to apply a compressive force to the lip to help seal the lip in the retracted state. The second end is an internal shape that seals the second end of the filling member (Internal shape part) In addition, the top portion is allowed to enter and exit in the axial direction as the plunger moves. In the retracted state, the writing core is between the first end and the second end to seal the writing core from the outside air, thereby making the cap unnecessary.
[Brief description of the drawings]
FIG. 1 is a side view showing a drawing state of a writing core in a self-sealing retractable writing instrument according to the present invention.
FIG. 2 is a side view showing a drawing-in state of the writing core in the writing instrument.
FIG. 3 is an exploded side view of the writing instrument.
FIG. 4 is a side cross-sectional view of the writing instrument with the writing core in a retracted state.
FIG. 5 is a side cross-sectional view of the writing instrument with the writing core in a drawn-out state.
FIG. 6 is a perspective view of the filling member as seen from the front.
FIG. 7 is a perspective view of the filling member viewed from the rear.
FIG. 8 is a side cross-sectional view of the front end portion of the writing instrument.
FIG. 9 is a side cross-sectional view of the front end portion of another writing instrument.
FIG. 10 is a perspective view of the clip as viewed from the front.
FIG. 11 is a perspective view of the clip viewed from the rear.
FIG. 12 is a perspective view of another filling member as seen from the front.
13 is a perspective view of the filling member of FIG. 12 as viewed from the rear.
14 is a perspective view of a clip for the filling member of FIG. 12 as viewed from the front.
FIG. 15 is a perspective view showing another combination of a filling member and a clip in a retracted state.
16 is a perspective view showing a combination of a filling member and a clip when moving from the retracted state of FIG. 15 to the pulled-out state.
17 is a perspective view showing the combination of the filling member and the clip of FIG. 15 in the drawn-out state.
FIG. 18 is an exploded perspective view showing another writing instrument.
FIG. 19 is an enlarged side sectional view showing the cartridge.
20 is an enlarged front sectional view showing an opening of the cartridge of FIG. 19;
FIG. 21 is a side view of a writing core and a nib.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100: Writing instrument 101: Writing cylinder 102: Writing core 104: 1st axial cylinder 106: 1st opening 108: 2nd axial cylinder 110: 2nd opening 112: Plunger 114: Cylindrical part 115: Support member 300: Filling member 301: Clip 302: First end 304: Second end 306: Steam chamber 307: Air hole 308: Nib 310: Axis 312: First cartridge 314: Second cartridge 316: Feeder 318: Extension part 320: Opening 322: Writing core 324: Flange 325: Edge part 326: Resistance member 328: Meshing mechanism 600: Lip 602: Slit 700: External Shape part 702: Inside Shape part 704: Second wall portion 706: Edge portion 708: Edge portion 800: Open end portion 802: Inner wall 900: Open end portion 1000: Support rim 1002: Holding arm 1004: End portion 1200: Filling member 1202: First end Portion 1204: Second end 1206: Lip 1208: Recess 1300: Inside Shape part 1302: Edge 1304: Support rim 1400: Clip 1402: End 1404: Support end Back 1406: Holding arm 1500: Filling member 1502: Clip 1504: End 1506: End 1508: Lip 1800: Writing instrument 1802: Plunger 1804 : Feeder 1806: Chip Writing core 1808: Cartridge 1809: Extension 1810: Resistance member 1812: Filling member 1814: Clip 1816: Housing Writing cylinder 1900: Main part 1902: First section 1904: Second section 1906: Third 1908: Indentation 2000: Teeth 2100: Edge

Claims (25)

A writing cylinder (101) having a first opening (106);
It is movable between the retracted state and the drawn state, and in the drawn state, the writing core (102) protrudes from the first opening (106), and in the retracted state, the writing core (102) is placed inside the writing cylinder (101). A writing core (102),
A cartridge (312) having an extension (318) to support the writing core (102);
A second end (304, comprising a first end (302, 1202) having a lip (600, 1206, 1508) and an internal shape (702, 1300) that seals around the extension (318) of the cartridge. 1204), the first end (302, 1202) is in the first opening (106) of the writing cylinder, and the writing core (102) is in the retracted state. The end (302) and the second end (304) are sealed from the outside air, and the writing core (102) has the lip of the filling member (300) and the first opening of the writing cylinder at the drawing position. A filling member (300, 1200, 1500) protruding through,
A clip (301, 1400, 1502) having a clamping end (1004, 1402, 1506) and a support rim (1000, 1304),
The sandwiching end portion exerts a compressive force on the lip (600, 1206, 1508) to seal the retracted lip (600, 1206, 1508), and the support rim (1000, 1304) is the first of the filling member (300). Self-sealing retractable writing instrument, characterized in that it is adapted to support two ends (304).   The writing cylinder (101) has a ridge in the vicinity of the first opening (106), and the filling member (300) has a recess (1208) that cooperates with the ridge of the writing cylinder, and the first opening ( 106. A self-sealing retractable writing instrument according to claim 1, wherein the filling member (300) is adapted to match a predetermined position inside the writing cylinder in the vicinity of 106).   The internal shape (702, 1300) has at least one edge (706, 708, 1302) to reduce friction between the internal shape (702, 1300) and the extension (318). A self-sealing retractable writing instrument as described in 1.   The self-sealing retractable writing instrument according to claim 1, wherein the internal features (702, 1300) comprise sloped edges.   An air hole (307) allowing air flow is provided between the writing core (102) and the extension (318) of the cartridge (312), and the air hole (307) is in a retracted state and has first and second filling members. The self-sealing retractable writing instrument according to claim 1 between the second ends.   The extension (318) comprises an open end (800), and when moved from the retracted state to the pulled out state, the open end (800) engages the inner wall (802) of the filling member (300) to open the lip, The self-sealing retractable writing instrument according to claim 1, wherein the writing core freely protrudes from the first opening.   Writing cylinder (101) has a second opening (110) for a plunger (112), and movement of the plunger (112) moves the writing core (102) between a retracted state and a drawn state. The self-sealing retractable writing instrument according to 1. The writing core is movable between a retracted state and a drawn state from the writing cylinder (101), and is a retractable writing instrument that seals the writing core (102) from the outside air,
The writing instrument is
A clip having a clamping end (1004, 1402) and a support rim (1000, 1404);
A filling member (300, 1200, 1500) having a first end (302, 1202) and a second end (304, 1204) defining a vapor chamber (306);
A support rim (1000, 1404) supports the second end of the filling member (300, 1200, 1500), the first end (302, 1202) has a lip (600, 1206, 1508); The second end (304, 1204) has an internal shape (702, 1300) and the writing core (102) is assisted with the clamping end of the clip retracted into the vapor chamber (306). The lip (600, 1206, 1508) is sealed from the outside air, and the lip and the clamping end are opened in the drawn-out state so that the writing core protrudes from the filling member and the writing cylinder. .   The filling member includes a cartridge (312) having an extension (318) for supporting the writing core (102), and when the writing core moves between a retracted position and a drawn position, the extension is an internal shape part. The self-sealing retractable writing instrument according to claim 8, wherein the self-sealing retractable writing instrument moves in a longitudinal direction with respect to (702, 1300), and the internal shape part seals around the extension.   10. The self-sealing retractable of claim 9, wherein the inner shape (702, 1300) has at least one edge (706, 708, 1302) to reduce friction between the inner shape and the extension. Writing instruments.   10. A self-sealing retractable writing instrument according to claim 9, wherein the internal shape comprises a trimmed edge (1302) to reduce friction between the internal shape and the extension.   10. The self of claim 9, further comprising an air hole (307) allowing air flow between the writing core and the cartridge extension, wherein the air hole (307) is located inside the steam chamber in a retracted state. Retractable writing instrument to seal.   The extension (318) has an open end (800) for receiving the writing core. When the extension (318) moves from the retracted state to the pulled out state, the open end engages with the inner wall (802) of the filling member to open the lip. 10. A self-sealing retractable writing instrument according to claim 9, wherein is freely projecting from the first opening.   The extension portion (318) has first (1902), second (1904), and third (1906) sections, and the second section (1904) includes the first section (1902) and the third section. (1906), in the retracted state, the first compartment is inside the steam chamber (306) and the second compartment (1904) forms a seal with the internal features (702, 1300). The third compartment (1906) is external to the steam chamber (306) and the first compartment (1902) tapers without resistance through the lip (600, 1206, 1508) of the filling member. The self-sealing retractable writing instrument according to claim 9.   The self-sealing retractable of claim 14, wherein the second compartment (1904) is flat along the longitudinal axis and forms a seal with the internal shape (702, 1300) of the filler member in the retracted state. Writing instrument.   As the third compartment moves inward of the steam chamber (306), the third compartment is such that the perimeter of the third compartment reduces friction between the third compartment and the internal features to a minimum. The self-sealing retractable writing instrument of claim 14, wherein (1906) tapers upward.   The third compartment (1906) is provided with a recess (1908), which is adapted to release the steam generated in the steam chamber when the writing core moves from the retracted state to the withdrawn state. The self-sealing retractable writing instrument according to claim 14, wherein a gap is formed between the internal shape portion.   The self-sealing retractable writing instrument according to claim 8, comprising a resistance member (326) that exerts a resistance force on the second end (304, 1204) of the filling member.   The cartridge (312) has an edge (325) and an extension (318) with an opening (320), the writing core (102) is inside the opening, and further comprises a resistance member (326). 9. The extension of claim 8, wherein the extension is within the resistance member and the resistance member is disposed between the second end (304, 1204) of the filling member and the edge (325) of the cartridge. Self-sealing retractable writing instrument.   The second end of the filling member includes an external shape portion (700), and the second end portion (304, 1204) tapers from the external shape portion to the internal shape portion (702, 1300) to form a steam chamber. 9. The self-sealing retractable writing instrument of claim 8, wherein the volume of the self-sealing is minimized.   9. The self-sealing according to claim 8, wherein the writing cylinder has a protrusion, and the filling member has a recess (1208) that cooperates with the protrusion of the writing cylinder to match the filling member to a predetermined position inside the writing cylinder. Retractable writing instrument.   9. The self-sealing retractable of claim 8, wherein the writing cylinder comprises a second opening (110) for the plunger, the movement of the plunger moving the writing core between a retracted state and a retracted state. Writing instrument.   9. Self-sealing retractor according to claim 8, wherein the clip (301, 1400, 1502) comprises a clamping arm (1002, 1300) and the filling member has a recess (1208) adapted to receive the clamping arm. Possible writing instruments. A writing instrument comprising a device for moving the writing core of the writing instrument between a retracted state and a drawn state;
An apparatus for moving the writing core of the writing instrument is:
A filling member (300, 1200) having a first end (302, 1202) and a second end (304, 1204), and wherein the second end has an internal shape (702, 1300). 1500)
A cartridge (312) having a compartment (1900) with an opening (320) for receiving a writing core (102);
The compartment is
A first section (1902) that tapers toward the opening (320) along a longitudinal axis;
The first is flat along the longitudinal axis so as to form a seal with the internal shape of the second end (304, 1204) of the filling member (300, 1200, 1500) in the retracted state of the writing core. Two compartments (1904);
When the writing core (102) moves from the retracted position to the extracted position, the taper increases in outer diameter toward the opening (320) so that friction between the second end and the internal shape portion is minimized. And a third section (1906),
When the third section (1906) passes through the second end, the third section includes a recess (1908) that forms a gap between the second end and the third section. Yes,
Writing instrument characterized by that. A retractable writing instrument in which the writing core (102) is movable between a retracted state and a drawn state from the writing cylinder (101), and seals the writing core (102) from outside air,
A filling member having a first end (302, 1202) having a slit of a predetermined width and a second end (304, 1204) defining a vapor chamber (306), wherein the first end Part is a filling member (300, 1200, 1500) that opens the slit in the drawn-out state of the writing core and closes the slit in the retracted position;
A clip (301, 1400) having a clamping end (1004, 1402) that exerts a compressive force acting to close the first end of the filling member;
The self-sealing retractable writing instrument, wherein the clip (301, 1400) includes a clamping end (1004, 1402) having a width at least equal to the width of the slit.

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