JP4242860B2 - Concealment type ballpoint pen - Google Patents

Description

  The present invention relates to a ballpoint pen that conceals the tip of a ballpoint pen when not in use.

Conventional ballpoint pens that conceal the tip when not in use include a knock type and a telescopic type. In the former knock type, the refill can be rewritten forward and backward alternately by repeatedly knocking, and can be written and stored. However, in the case of this knock type, there is a risk that when the refill is retracted and stored in a bag or pocket, the refill is knocked inadvertently and the refill becomes a writing state, thereby contaminating clothes or documents.

In addition, in the case of a retractable ballpoint pen, unlike simply knocking, it is easy to extend and retract with both hands, so it is rarely inadvertently stretched and written, but it is called a two-handed operation. Inconvenience is unavoidable.

  Therefore, the present invention makes it possible to expose and conceal the tip of the ballpoint pen refill by one hand operation with almost no change in the overall length, and to provide a concealment type ballpoint pen that does not inadvertently stain clothes. It is something to be offered.

The body includes a barrel, a crown that can be slidably inserted into the rear of the barrel, and can be pushed in and freely rotated. The barrel has a shaft body with a base at the tip, and the shaft body. A ball-point pen refill that is removably inserted into a core cylinder provided through the core and protrudes from the base, and an internal step of the shaft body and a sliding point described later at an intermediate position of the ball-point pen refill. A sliding tip that can be protruded to a position where the tip of the ballpoint pen refill is concealed via a spring between the gold stopper and a stopper of the sliding tip directly through the barrel core. It consists of a push bar that is indirectly contacted and can be pressed against the spring, and a lock mechanism built in the shaft body. The lock mechanism abuts the other end of the push bar and is slidably fitted to the rear of the shaft body via a holder. Aligned with lock cylinder and rear end of trunk core This restriction piece penetrates into a straight groove provided in the axial direction of the lock cylinder, and the end portion of this straight groove has an inclined guiding surface and a latching concave surface inclined at a position shifted from the axis. It is continuous with the triangular guide hole provided, and it is possible to freely stop the restricting piece on the latching concave surface, and the crown is fixed to the rear end of the lock cylinder and is connected to the trunk core and the shaft main body. It is slidably inserted into a holder that is press-fitted and fixed so that it can rotate within the range of the guide hole, and the tip of the sliding tip is exposed by rotating and pushing the crown. It is a concealment type ballpoint pen that protrudes to the concealment position of the nib of the ballpoint pen refill and can be freely stopped.

  As an effect of the present invention, it is convenient to expose and conceal the tip of the lead by one-handed operation, and it keeps the concealed state of the tip of the tip as it is and does not inadvertently stain documents, clothes and the like.

Referring to FIG. 1 to FIG. 7 in detail, the body 4 is composed of a body 4 and a crown 11 that is slidably inserted into the rear of the body 4 and can be pushed in and freely rotated. A shaft main body 19 provided with a base 14 at the tip, and a core cylinder 3 provided in the shaft main body 19 via a core core 6 are detachably inserted so that a core tip 13 ′ protrudes from the base 14. The tip 13 'of the ballpoint pen refill 13 is interposed between the internal step 20 of the shaft body 19 and a stopper 2 of the sliding tip 1 described later at a middle position between the ballpoint refill 13 and the stopper 2 of the sliding tip 1 described later. A sliding tip 1 that can protrude to a position to be concealed, and a push rod 5 that penetrates the barrel core 6 and directly contacts the stopper 2 of the sliding tip 1 and presses against the spring 12. And a lock mechanism 21 provided in the shaft body 19, The mechanism 21 is in contact with the other end of the push bar 5 and is slidably and rotatably fitted through a barrel core 6 at the rear of the shaft body 19 and a holder 9 press-fitted and fixed to the shaft body 19. The restricting piece 8 protrudes from the rear end of the core 6, and the restricting piece 8 penetrates into a straight groove 22 provided in the axial direction of the lock cylinder 7. It is continuous with a triangular guide hole 25 provided with an inclined guide surface 23 and a latching concave surface 24 inclined at a position shifted from the position, and the stop piece 8 can be freely stopped on the latching concave surface 24. The crown 11 is fixed to the rear end of the lock cylinder 7 and can be rotated within a range of the triangular guide hole 25 by a holder 9 press-fitted and fixed to the trunk core 6 and the shaft body 19. and each other by fitting, to expose the Shinsaki 13 'by the rotation and extrusion crown 11, sliding A Le Pen - projecting the tip of the gold 1 to conceal the position of the nib ballpoint pen refill 13, stop freely and the nib concealed type ball. In the figure, reference numeral 10 denotes a clip. Note that the holder 9 is not necessarily required if it does not hinder assembly work.

The base 14 has a cylindrical portion 14 ′ extending rearward, covers a grip 15 on the surface, and has a joint 16 fixed to the base end. The joint 16 is screwed to the tip of the shaft body 19. It can be removed freely. The sliding tip 1 is composed of a front end fitting portion 26 and a sliding shaft portion 27 provided with a stopper 2 at the rear end, and is fixed to each other.

In the above illustration, the push bar 5 is relatively long and straddles the side space position of the ballpoint pen refill 13. For this reason, a space for arranging the push rod 5 between the shaft main body 19 and the refill 13 is required, so that there is a structural necessity that the shaft main body 19 becomes relatively thick.

FIGS. 8 to 13 relate to another embodiment in which the shaft body 19 is relatively thin and can be loaded with a thick ballpoint pen refill 13. The push cover 5 ′ and the core tube 3 are arranged between the core tube 3 and the trunk core 6. An auxiliary shaft 28 that is fixed and penetrates the push cover 5 ′ is provided so that the pressing force of the push bar 5 can be transmitted indirectly to the push cover 5 ′ and the stopper 2. The tip 13 can be protruded to the concealment position.

Action

The operation will be described below. FIGS. 1 and 8 are longitudinal sectional views in which the tip 13 'is exposed from the tip of the sliding tip 1 in a writing state. To make the tip 13' concealed from this writing state, When the crown 11 is pressed, the lock cylinder 7 is first linearly moved and rotated along the inclined guide surface 23 of the linear groove 22 and the guide hole 25 by the restricting piece 8, and the push bar 5 and the stopper 7 are moved to the spring 12 accordingly. Against this, the sliding tip 1 is pushed forward and concealed with a margin 13 ′. The restriction piece 17 at this time is at the end position of the tilt guide surface 23 as shown in FIGS. 5 and 12, but when the crown 11 is released, the lock cylinder 15 is moved slightly backward by the spring 12, and the restriction piece 17 is restricted. The frame 8 stops on the latching concave surface 24 (FIGS. 6 and 13), and the core tip 13 'is concealed by the distal end metal fitting 26 of the sliding tip 1 so as to be stored.

3 (FIG. 6) and FIG. 10 (FIG. 13) to change from the concealed state of the tip 13 'to the writing state, the crown 11 is rotated downward in the figure, and the restriction piece 8 is rotated by the rotating operation. And the latching concave surface 24 are disengaged, and at the same time, the stopper 2, the push rod 5, and the lock cylinder 7 are moved by the pressing force of the spring 12 to expose the core, and the writing state shown in FIG. 1 (FIG. 8) is obtained.

Cross-sectional explanatory drawing at the time of writing of the concealment type ballpoint pen concerning the present invention Cross-sectional explanatory drawing during concentric tip concealment work Cross-sectional explanatory drawing when concentric tip concealment Explanation of internal mechanism at the time of writing in FIG. 2 is an explanatory diagram of the internal mechanism in the middle of work. 3 is an explanatory diagram of the internal mechanism at the time of concealing the tip of FIG. Expanded cross-sectional illustration of the grip part Cross-sectional explanatory drawing at the time of writing of the concealment type ballpoint pen concerning other examples Cross-sectional explanatory drawing during concentric tip concealment work Cross-sectional explanatory drawing when concentric tip concealment Internal mechanism explanatory drawing at the time of writing of FIG. 9 is an explanatory diagram of the internal mechanism in the middle of work. 10 is an explanatory diagram of an internal mechanism at the time of concealing the tip of FIG.

Explanation of symbols

1: sliding tip 2: stopper 3: core cylinder 4: barrel 5: push rod 5 ': push cover 6: trunk core 7: lock barrel 8: restriction piece 9: holder 10: clip 11: crown 12: Spring 13: Ball-point pen refill 13 ′: Tip 14: Base 14 ′: Cylindrical portion 15: Grip 16: Joint 17: Restricting piece 19: Shaft body 20: Internal step 21: Lock mechanism 22: Linear groove 23: Inclination guide surface 24: Retaining concave surface 25: Guide hole 26: Tip metal part 27: Sliding shaft part 28: Auxiliary shaft

Claims (2)

The body includes a barrel, a crown that can be slidably inserted into the rear of the barrel, and can be pushed in and freely rotated. The barrel has a shaft body with a base at the tip, and the shaft body. A ball-point pen refill that is removably inserted into a core cylinder provided through the core and protrudes from the base, and an internal step of the shaft body and a sliding point described later at an intermediate position of the ball-point pen refill. A sliding tip that can be protruded to a position where the tip of the ballpoint pen refill is concealed via a spring between the gold stopper and a stopper of the sliding tip directly through the barrel core. It consists of a push bar that is indirectly contacted and can be pressed against the spring, and a lock mechanism built in the shaft body. The lock mechanism abuts the other end of the push bar and is slidably fitted to the rear of the shaft body via a holder. Aligned with lock cylinder and rear end of trunk core This restriction piece penetrates into a straight groove provided in the axial direction of the lock cylinder, and the end portion of this straight groove has an inclined guiding surface and a latching concave surface inclined at a position shifted from the axis. It is continuous with the triangular guide hole provided, and it is possible to freely stop the restricting piece on the latching concave surface, and the crown is fixed to the rear end of the lock cylinder and is connected to the trunk core and the shaft main body. It is slidably inserted into a holder that is press-fitted and fixed so that it can rotate within the range of the guide hole, and the tip of the sliding tip is exposed by rotating and pushing the crown. A concealment type ballpoint pen that protrudes to the concealment position of the tip of the ballpoint pen refill and can be freely stopped. A push cover and an auxiliary shaft 28 that is fixed to the core tube 3 and passes through the push cover 5 'are provided between the core tube and the core, and the pressing force of the push rod 5 can be transmitted indirectly to the push cover and the stopper. The lead-tip concealment type ballpoint pen according to claim 1, wherein the tip metal part of the slide tip is freely projectable to a concealment position of the lead-tip .