Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
  • B43K23/08—Protecting means, e.g. caps
  • B43K23/12—Protecting means, e.g. caps for pens
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
  • B43K5/16—Pens with ink reservoirs in holders, e.g. fountain-pens with retractable nibs
  • B43K5/17—Pens with ink reservoirs in holders, e.g. fountain-pens with retractable nibs with closing means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
  • B43K23/08—Protecting means, e.g. caps
  • B43K23/12—Protecting means, e.g. caps for pens
  • B43K23/122—Protecting means, e.g. caps for pens with means for preventing choking
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
  • B43K23/08—Protecting means, e.g. caps
  • B43K23/12—Protecting means, e.g. caps for pens
  • B43K23/128—Protecting means, e.g. caps for pens with spring means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
  • B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
  • B43K24/06—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by turning means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
  • B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
  • B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K7/00—Ball-point pens
  • B43K7/12—Ball-point pens with retractable ball points
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K8/00—Pens with writing-points other than nibs or balls
  • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
  • B43K8/028—Movable closure or gate
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
  • B43K—IMPLEMENTS FOR WRITING OR DRAWING
  • B43K8/00—Pens with writing-points other than nibs or balls
  • B43K8/24—Pens with writing-points other than nibs or balls characterised by the means for retracting writing-points

Definitions

• FIG. 1 is a diagram for explaining an embodiment of the present invention, and is a vertical cross-sectional view showing an example of a writing instrument in an immersed state.
• FIG. 2 is a vertical cross-sectional view showing the writing implement of FIG. 1 in an extended state.
• FIG. 3 is a perspective view showing the sealing mechanism of the writing instrument.
• FIG. 4 is a perspective view showing a guide portion of the sealing mechanism.
• FIG. 5 is a diagram showing the cover member and the guide portion in the immersed state.
• FIG. 6 is a cross-sectional view taken along line VI-VI in FIG.
• FIG. 7 is a diagram for explaining an example of an assembly process of the sealing mechanism.
• FIG. 8 is a diagram for explaining an example of an assembly process of the sealing mechanism.
• FIG. 9 is a perspective view showing the cover member and the guide portion of FIG. 8.
• FIG. 10 is a diagram for explaining an example of an assembly process of the sealing mechanism.
• FIG. 11 is a diagram for explaining an example of an assembly process of the sealing mechanism.
• FIG. 12 is a view showing the cover member and the guide portion during opening and closing.
• FIG. 13 is a diagram showing a modified example of the sealing mechanism, and is a perspective view showing a cover member and a guide portion of the sealing mechanism.
• FIG. 14 is a perspective view showing the guide portion of FIG.
• FIG. 15 is a diagram showing the cover member and the guide portion in the immersed state.
• FIG. 16 is a cross-sectional view taken along line XVI-XVI in FIG.
• the writing instrument 10 of this embodiment includes a writing member 12, a barrel 20, a retractable mechanism 40, and a sealing mechanism 70.
• the writing instrument 10 extends along a central axis A.
• the writing member 12 is a member that forms handwriting on a writing surface such as a paper surface.
• the writing member 12 is housed in the barrel 20. Examples of the writing member 12 include members used in ballpoint pens, fountain pens, markers, etc. In this embodiment, an example in which the writing instrument 10 is a fountain pen will be described.
• the writing member 12 of this embodiment has a pen tip 13 provided at the front end, a storage tube 15 that stores ink, a first receiving portion 17, and a protruding portion 19.
• the storage tube 15 may be, for example, a cartridge type or a converter.
• the first receiving portion 17 is a surface facing forward in a step formed on the outer surface of the writing member 12, and receives the elastic force of a first elastic member 42 described below.
• the protrusion 19 protrudes radi
• the retraction mechanism 40 is a mechanism for switching the writing instrument 10 alternately between a protruding state in which the pen tip 13 protrudes from the front end opening 20a of the barrel 20, and a retracted state in which the pen tip 13 retracts from the front end opening 20a.
• An opening 22a is formed at the tip of the inner shaft 22, through which the pen tip 13 can pass.
• a contact surface 22b is formed around the periphery of the opening 22a.
• the contact surface 22b is the surface that comes into contact with the cover member 71 (described below) in the immersed state.
• the tip member 30 is a member that forms the tip portion of the barrel 20.
• the tip member 30 has the function of protecting the front end of the front barrel 21, the cover member 71, and the resilient member 90.
• the tip member 30 has a generally truncated cone shape, and its outer diameter decreases toward the front.
• a front end opening 20a is formed at the front end of the tip member 30, through which the pen tip 13 appears and disappears.
• the rear end of the tip member 30 is attached to the front end of the front barrel 21, thereby connecting the tip member 30 to the front barrel 21.
• the tip member 30 is connected to the front barrel 21, for example, by press-fitting, gluing, or screwing in the threaded portion.
• the inner shaft 32 and the outer shaft 35 may be formed of a single member.
• the inner shaft 32, the outer shaft 35, and the second connecting member 36 may be formed of a single member.
• the entire rear shaft 31 may be formed integrally.
• a hole 56 extending in the axial direction da is formed inside the knock member 50.
• the hole 56 is open at the front end of the knock member 50 and closed at the rear end of the knock member 50.
• An inward protrusion 58 that protrudes radially inward is formed on the inner surface of the hole 56.
• the cover member 71 closes the front end of the inner shaft 22 in the recessed state to seal the storage space S, and allows the pen tip 13 to protrude in the protruding state.
• the cover member 71 is configured to be rotatable around a pin 79 that serves as a rotation axis.
• the cover member 71 has a closing portion 72 that closes the opening 22a, a leg portion 76 that supports the closing portion 72, and a locking portion 78 that locks the first end 95 of the resilient member 90 (described later).
• the closing portion 72 has a closing surface 73 and a first side surface 74 that face the contact surface 22b and contact the contact surface 22b when the cover member 71 closes the opening 22a.
• the closing surface 73 is a plane that extends parallel to the contact surface 22b when the cover member 71 closes the opening 22a.
• the first side surface 74 is a side surface that extends in a direction that intersects with the closing surface 73. In this embodiment, the first side surface 74 is a plane that extends perpendicular to the closed surface 73.
• FIG. 12 is a diagram showing the cover member 71 and guide portion 80 in the middle of opening and closing.
• a gap having a width W1 is formed between the first side surface 74 and the first guide surface 82. This prevents the first side surface 74 and the guide portion 80 from coming into contact with each other in the middle of opening and closing the cover member 71, as shown in FIG. 12.
• Such a width W1 may be, for example, 0 mm or more and 1.0 mm or less.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=91717454

Family Applications (1)

Country Status (6)

Citations (5)

• 2023
  • 2023-12-19 JP JP2024567652A patent/JPWO2024143064A1/ja active Pending
  • 2023-12-19 WO PCT/JP2023/045445 patent/WO2024143064A1/ja not_active Ceased
  • 2023-12-19 CN CN202380084604.6A patent/CN120344405A/zh active Pending
  • 2023-12-19 KR KR1020257024647A patent/KR20250129718A/ko active Pending
  • 2023-12-19 EP EP23911844.1A patent/EP4644132A1/en active Pending
  • 2023-12-22 TW TW112150314A patent/TW202440351A/zh unknown

Patent Citations (5)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events