Direct-fluid-supply writing implement

Abstract

A direct-fluid-supply writing implement has a pentip, an ink occlusion body connected to a rear end of the pentip, an ink tank that directly stores ink and is arranged at a rear of the ink occlusion body, a plurality of communication tubes that connects the ink tank to the ink occlusion body and a partition wall provided between the ink occlusion body and the ink tank. Forward end portions of the communication tubes are protruded forward from a front face of the partition wall, and are located inside the ink occlusion body. At least one of the communication tubes is provided such that a rear end of the communication tube is protruded backward from a rear face of the partition wall and is located inside the ink tank.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a longitudinal sectional view showing a state in which a pentip is directed downward of the first embodiment of the present invention;

FIG. 2 is a sectional view taken on line II-II in FIG. 1;

FIG. 3 is a longitudinal sectional view showing a state in which a pentip is directed downward of the second embodiment of the present invention;

FIG. 4 is a longitudinal sectional view showing a state in which a pentip is directed downward of the third embodiment of the present invention;

FIG. 5 is a longitudinal sectional view showing a state in which a pentip is directed downward of the fourth embodiment of the present invention;

FIG. 6 is a longitudinal sectional view showing a state in which a pentip is directed downward of the fifth embodiment of the present invention;

FIG. 7 is a sectional view taken on line VII-VII in FIG. 6;

FIG. 8 is a lateral sectional view showing an example of another communication tube;

FIG. 9 is a lateral sectional view showing an example of another communication tube;

FIG. 10 is a longitudinal sectional view showing a state in which a pentip is directed downward of the sixth embodiment of the present invention;

FIG. 11 is a longitudinal sectional view showing a state in which a pentip is directed downward of the seventh embodiment of the present invention;

FIG. 12 is a longitudinal sectional view showing a state in which a pentip is directed downward of the eighth embodiment of the present invention;

FIG. 13 is a longitudinal sectional view showing a state in which a pentip is directed downward of the ninth embodiment of the present invention;

FIG. 14(A) is an enlarged sectional view taken on line XIIIA-XIIIA in FIG. 13;

FIG. 14(B) is an enlarged sectional view taken on line XIIIB-XIIIB in FIG. 13;

FIG. 14(C) is an enlarged sectional view taken on line XIIIC-XIIIC in FIG. 13;

FIG. 15(A) is an enlarged sectional view taken on line XVA-XVA in FIG. 13;

FIG. 15(B) is an enlarged sectional view taken on line XVB-XVB in FIG. 13;

FIG. 16 is a longitudinal sectional view showing a state in which a pentip is directed downward of the tenth embodiment of the present invention;

FIG. 17(A) is an enlarged sectional view taken on line XVIIA-XVIIA in FIG. 16;

FIG. 17(B) is an enlarged sectional view taken on line XVIIB-XVIIB in FIG. 16;

FIG. 17(C) is an enlarged sectional view taken on line XVIIC-XVIIC in FIG. 16;

FIG. 18(A) is an enlarged sectional view taken on line XVIIIA-XVIIIA in FIG. 16;

FIG. 18(B) is an enlarged sectional view taken on line XVIIIB-XVIIIB in FIG. 16;

FIG. 19 is a longitudinal sectional view showing a state in which a pentip is directed downward of the eleventh embodiment of the present invention;

FIG. 20 is a longitudinal sectional view showing a state in which a pentip is directed downward of the twelfth embodiment of the present invention;

FIG. 21 is a longitudinal sectional view showing a state in which a pentip is directed downward of the thirteenth embodiment of the present invention;

FIG. 22 is a longitudinal sectional view showing a state in which a pentip is directed downward of the fourteenth embodiment of the present invention;

FIG. 23(A) is an enlarged sectional view taken on line XXIIIA-XXIIIA in FIG. 22;

FIG. 23(B) is an enlarged sectional view taken on line XXIIIB-XXIIIB in FIG. 22;

FIG. 23(C) is an enlarged sectional view taken on line XXIIIC-XXIIIC in FIG. 22;

FIG. 24 is a longitudinal sectional view showing a state in which a pentip is directed downward of the fifteenth embodiment of the present invention;

FIG. 25(A) is an enlarged sectional view taken on line XXVA-XXVA in FIG. 24;

FIG. 25(B) is an enlarged sectional view taken on line XXVB-XXVB in FIG. 24; and

FIG. 25(C) is an enlarged sectional view taken on line XXVC-XXVC in FIG. 24.

Claims

1. A direct-fluid-supply writing implement comprising: a pentip;an ink occlusion body connected to a rear end of the pentip;an ink tank that directly stores ink and is arranged at a rear of the ink occlusion body;a plurality of communication tubes that connects the ink tank to the ink occlusion body; anda partition wall provided between the ink occlusion body and the ink tank, whereinforward end portions of the communication tubes are protruded forward from a front face of the partition wall, and are located inside the ink occlusion body, andat least one of the communication tubes is provided such that a rear end of the communication tube is protruded backward from a rear face of the partition wall and is located inside the ink tank.

2. The direct-fluid-supply writing implement according to claim 1, wherein positions of the forward end portions of the communication tubes in the axial direction are set equally to each other.

3. The direct-fluid-supply writing implement according to claim 1, wherein the forward end portions of the communication tubes are located at positions close to the rear end portion of the pentip in the ink occlusion body.

4. The direct-fluid-supply writing implement according to claim 1, wherein the forward end portions of the communication tubes are located at positions in the front of the inside of the ink occlusion body, and the rear end portion of the pentip is located in a front side of the inside of the ink occlusion body.

5. The direct-fluid-supply writing implement according to claim 1, wherein a rear end portion of the pentip and the forward end portions of the communication tubes are connected to each other so that the ink flows therebetween through the ink occlusion body.

6. The direct-fluid-supply writing implement according to claim 1, wherein the forward end portions of the communication tubes are inserted from the rear of the ink occlusion body to the front so as to push and compress the inside of the ink occlusion body to the front, so that density of the ink occlusion body in a vicinity of the forward end portions of the communication tubes is set to be higher than density of the ink occlusion body in a portion except for the vicinity of the forward end portions of the communication tubes.

7. The direct-fluid-supply writing implement according to claim 1, wherein a front end opening portion of the ink tank before the opening portion is opened is closed with a plug body,a connection tube is protruded backward from a rear face of the partition wall,the connection tube is attached to the inside of the front end opening portion of the ink tank, the connection tube pushes the plug body so as to open the ink tank,the communication tube protruded backward from the rear face of the partition wall is located inside the connection tube, andthe rear end of the communication tube protruded backward from the rear face of the partition wall is located at a position in a front portion of the rear end of the connection tube, or alternatively, a position in an axial direction of the rear end portion of the communication tube protruded backward from the rear face of the partition wall and a position in the axial direction of the rear end portion of the connection tube substantially coincide with each other.

8. The direct-fluid-supply writing implement according to claim 7, wherein a protruding piece for pushing one side of the plug body at the time of opening the ink tank is arranged on one side at the rear of the connection tube, and an outer face of the communication tube protruded backward from the rear face of the partition wall and an inner face of the protruding piece are made to come close to each other.

9. The direct-fluid-supply writing implement according to claim 1, wherein the ink occlusion body includes a high density portion and a low density portion connected at the rear of the high density portion, and the forward end portions of the communication tubes and the rear end of the pentip are located in the high density portion.

10. The direct-fluid-supply writing implement according to claim 9, wherein the communication tubes penetrate the inside of the low density portion, and the forward end portions of the communication tubes and the rear end portion of the pentip are located in the high density portion.

11. The direct-fluid-supply writing implement according to claim 9, wherein when the forward end portions of the communication tubes are inserted into the ink occlusion body from the rear end, the front end portions of the communication tubes push and compress the inside of the ink occlusion body forward, so that the high density portion is formed inside the ink occlusion body in the vicinity of the front end portions of the communication tubes.

12. The direct-fluid-supply writing implement according to claim 9, wherein the high density portion is formed when an outside of the ink occlusion body is pushed and compressed inward in a radial direction.

13. The direct-fluid-supply writing implement according to claim 9, wherein the high density portion is formed when a front end face of the ink occlusion body is pushed and compressed backward.

14. The direct-fluid-supply writing implement according to claim 9, wherein the ink occlusion body includes a first ink occlusion body, of which density is set at a high value, anda second ink occlusion body, of which density is set at a low value, whereinthe first ink occlusion body forms the high density portion and the second ink occlusion body forms the low density portion.

15. The direct-fluid-supply writing implement according to claim 9, wherein a front end opening portion of the ink tank before the opening portion is opened is closed with a plug body,a connection tube is protruded backward from a rear face of the partition wall,the connection tube is attached to the inside of the front end opening portion of the ink tank, the connection tube pushes the plug body so as to open the ink tank,the communication tube protruded backward from the rear face of the partition wall is located inside the connection tube, andthe rear end of the communication tube protruded backward from the rear face of the partition wall is located at a position in a front portion of the rear end of the connection tube, or alternatively, a position in an axial direction of the rear end portion of the communication tube protruded backward from the rear face of the partition wall and a position in the axial direction of the rear end portion of the connection tube substantially coincide with each other.

16. The direct-fluid-supply writing implement according to claim 15, wherein a protruding piece for pushing one side of the plug body at the time of opening the ink tank is arranged on one side at the rear of the connection tube, and an outer face of the communication tube protruded backward from the rear face of the partition wall and an inner face of the protruding piece are made to come close to each other.

17. A direct-fluid-supply writing implement comprising: a pentip;an ink occlusion body connected to a rear end of the pentip;an ink tank that directly stores ink and is arranged at the rear of the ink occlusion body;a plurality of communication tubes that connects the ink tank to the ink occlusion body; anda partition wall provided between the ink occlusion body and the ink tank, whereinforward end portions of the communication tubes are protruded forward from a front face of the partition wall, and are located inside the ink occlusion body,a connection tube attached to the front end opening portion of the ink tank is protruded backward with respect to the rear face of the partition wall, andflow passages is provided in the communication tubes so as to penetrate the partition wall located in the connection tube.

18. The direct-fluid-supply writing implement according to claim 17, wherein the flow passages of the communication tubes penetrate portions except for an axial center of the partition wall located in the connection tube.

19. The direct-fluid-supply writing implement according to claim 17, wherein the partition wall, the communication tubes and the connection tube are integrated into one body.

20. The direct-fluid-supply writing implement according to claim 17, wherein an attaching cylindrical portion that surrounds a base portion of each communication tube or a base portion of the connection tube is integrally formed on the partition wall, and an outer face of the attaching cylindrical portion is fixed onto an inner face of the barrel.

21. The direct-fluid-supply writing implement according to claim 17, wherein the ink occlusion body includes a high density portion and a low density portion connected to a rear portion of the high density portion, and front end portions of the communication tubes and a rear end portion of the pentip are located in the high density portion.

22. A direct-fluid-supply writing implement comprising: a pentip;an ink occlusion body connected to a rear end of the pentip;an ink tank that directly stores ink, and is arranged at the rear of the ink occlusion body;a plurality of communication tubes that connects the ink tank to the ink occlusion body; anda partition wall provided between the ink occlusion body and the ink tank, whereinforward end portions of the communication tubes are protruded forward from a front face of the partition wall, and are located inside the ink occlusion body,a contact wall portion that comes into contact with a portion of the rear end face of the ink occlusion body is provided on a front face of the partition wall,when the contact wall portion and the rear end face of the ink occlusion body are contacted with each other, a gap that communicates with an ambient air is formed between the rear end face of the ink occlusion body and the front face of the partition wall,the contact wall portion is connected to a base portion of each communication tube and the front face of the partition wall, andthe contact wall portion connects the base portions of the communication tubes to each other.

23. The direct-fluid-supply writing implement according to claim 22, wherein the contact wall portion is made of a plate-shaped rib protruding in an axial direction.

24. The direct-fluid-supply writing implement according to claim 22, wherein the ink occlusion body includes a high density portion and a low density portion connected to a rear portion of the high density portion, and front end portions of the communication tubes and a rear end portion of the pentip are located in the high density portion.

25. The direct-fluid-supply writing implement according to claim 22, wherein a connection tube attached to the front end opening portion of the ink tank is protruded backward from the rear face of the partition wall, and the partition wall, the communication tubes, the contact wall portion and the connection tube are integrated with each other.

26. The direct-fluid-supply writing implement according to claim 22, wherein an attaching cylindrical portion surrounding a base portion of each communication tube or a base portion of the connection tube is provided so as to be integrated with the partition wall, and an outer face of the attaching cylindrical portion is fixed onto an inner face of the barrel.