JPH0719835Y2 - Ballpoint pen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a ballpoint pen in which a rotary cam mechanism is operated by a slide operation by an operating portion so that a pen tip of a refill can be retracted from a tip of an outer cylinder.

[Conventional technology and its problems]

This type of conventional ballpoint pen has a structure in which the rotary cam mechanism is actuated by the rear end knock to cause the tip of the refill to project from and retract into the tip of the outer cylinder. There is a problem that the convenience is lacking because the tip cannot appear and disappear, and the outer cylinder must be changed.

[Means for Solving the Problems]

In order to solve the above problems, the ballpoint pen of the present invention has a refill 2 inserted in an outer cylinder 1 as shown in the drawing, and a first elastic body 4 between the refill 2 and a tip 3 of the outer cylinder 1. The outer cylinder 1 is provided with a sliding hole 5 in the front portion thereof, and an operating portion 6 engaged with the refill 2 is slidably provided in the sliding hole 5 and fitted to the rear end portion of the refill 2. The inserted rotor 7 and the cam body 8 provided on the inner surface of the outer cylinder 1.
And a rotary cam mechanism 10 including a cam bar 9 that moves in the axial direction and engages with the cam of the rotor 7 and moves up and down. The cam bar 9 of the rotary cam mechanism 10 and the stopper portion 11 at the rear of the outer cylinder 1 are attached. The second elastic body 12, which is weaker than the elastic force of the first elastic body 4, is inserted between and.

[Action]

When the operating portion 6 is slid, the refill 2 resists the first elastic body 4 so that the pen tip 14 projects from the tip tool 3, while the rotor 7 moves forward and the cam bar 9 moves the second elastic body 12 toward the second elastic body 12. It moves forward due to the elastic force, and the rotor 7 moves with respect to the cam body 8.
Is rotated by a predetermined angle by the cam bar 9 to bring the cam of the rotary lever 7 and the cam bar 9 into engagement with each other, and the pen tip 14 is maintained to project from the tip tool 3 for writing.

When the pen tip 14 is retracted, the operating portion 6 is slid, and the refill 2 resists the first elastic body 4 and the tip 3
The pen tip 14 moves slightly further than the writing state, and the rotor 7
Is rotated by a predetermined angle by the cam bar 9 and the cam of the rotor 7 and the cam bar 9 are disengaged, and the rotor 7 and the cam bar 9 are moved rearward with respect to the cam body 8 by the elastic force of the first elastic body 4, and the refill The second pen tip 14 is retracted from the tip tool 3.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a simplified sectional view showing the construction of an embodiment of the ball-point pen of the present invention. In FIG. 1, 1 is an outer cylinder, and 2 is a refill inserted in the outer cylinder 1. Receptacle 2 receiving part 15
The first spring 4 is inserted between the step part 16 of the front tool 3 and the front part of the outer tube 1, and the slide hole 5 is provided in the front part of the outer tube 1.

The movable body 13 is locked to the receiving portion 15 of the refill 2 so as to close the sliding hole 5 and fitted into the refill 2.
An operation portion 6 projecting from the slide hole 5 is attached to the movable body 13 by inserting its foot 6a. The operation unit 6 is provided integrally with or separately from the movable body 13.

The rotor 7 is inserted into the rear end portion of the refill 2, and the outer cylinder 1
A cam body 8 is integrally or separately provided on the inner surface of the, and a cam bar 9 engaged with the cam of the rotor 7 is inserted through the center of the rear surface of the cam body 8. Rotor 7, cam body 8
The cam bar 9 constitutes a conventionally known rotary cam mechanism 10.

The second spring, which is weaker than the spring force of the first spring 4, is provided between the receiving portion 9a of the cam bar 9 of the rotary cam mechanism 10 and the stopper portion 11 such as a cap or tail plug screwed to the rear portion of the outer cylinder 1. 12 are inserted. The stopper portion 11 may be fitted to the rear portion of the outer cylinder 1 or may be integrally provided.

In the embodiment having the above-described structure, when the operation portion 6 is slid, the movable body 13 and the refill 2 project the pen tip 14 from the tip 3 against the first spring 4, while the rotor 7 moves forward. And the cam bar 9 is moved forward by the elastic force of the second elastic body 12, and the rotor 7 is moved with respect to the cam body 8.
Is rotated by a predetermined angle by the cam bar 9 to bring the cam of the rotor 7 and the cam bar 9 into engagement with each other, and the pen tip 14 is maintained in a state of protruding from the tip 3 (see FIG. 2) for writing. .

When the pen tip 14 is retracted, the manipulator 6 is slid to move the movable body 13 and the refill 2 against the first spring 4 so that the pen tip 14 moves forward from the tip tool 3 a little further than the writing state. 7 is rotated by a predetermined angle by the cam bar 9, the cam of the rotor 7 and the cam bar 9 are disengaged, and the cam body 8
On the other hand, the rotor 7 and the cam bar 9 are moved rearward by the spring force of the first spring 4, and the pen tip 14 of the refill 2 is retracted from the tip tool 3 (see FIG. 1).

FIG. 3 shows the cam body 8 of the rotary cam mechanism 10 inserted into the outer cylinder 1.
This is an example of fixing with 17 interposed.

When the movable body 13 is provided as in the present embodiment, not only can the operation portion 6 be operated smoothly without fail, but also the interior cannot be seen through the slide hole 5, so that the design is not damaged.

[Effect of device]

As described above, according to the present invention, the refill 2 is provided in the outer cylinder 1.
The first elastic body 4 is inserted between the refill 2 and the tip 3 of the outer cylinder 1, and a slide hole 5 is provided in the front portion of the outer cylinder 1. , A rotor 7 fitted to the rear end of the refill 2, a cam body 8 provided on the inner surface of the outer cylinder 1, and an axial direction A rotating cam mechanism 10 including a cam bar 9 that is moved to the right and is engaged with the cam of the rotor 7.
A second elastic body 12 which is weaker than the elastic force of the first elastic body 4 is inserted between the cam bar 9 of the rotary cam mechanism 10 and the stopper portion 11 at the rear portion of the outer cylinder 1. Since the operation portion 6 is slidably provided in the slide hole 5 provided in the front portion of the outer cylinder 1, the side slide operation of the operation portion 6 allows the outer cylinder 1 to be held in a writing state, The pen tip 14 can be retracted and retracted, it is not necessary to carry the outer cylinder 1 again, and a ballpoint pen with excellent convenience can be provided.

[Brief description of drawings]

FIG. 1 is a simplified sectional view showing the construction of an embodiment of the ballpoint pen of the present invention, FIG. 2 is a simplified sectional view showing the state in which the pen tip is also projected, and FIG. 3 shows the cam body of the rotary cam mechanism of the present invention. It is sectional drawing which shows another example at the time of fixing to an outer cylinder. 1 ... Outer cylinder, 2 ... Refill, 3 ... Tip, 4 ... First elastic body (spring), 5 ... Slide hole, 6 ...
Operation part, 7 ... Rotor, 8 ... Cam body, 9 ... Cam bar, 10 ... Rotating cam mechanism, 11 ... Stopper part, 12 ...
2nd elastic body (spring), 13 ... movable body, 14 ... nib.

Claims (2)

[Scope of utility model registration request] 1. A refill (2) is inserted into an outer cylinder (1), and a first elastic body (4) is provided between the refill (2) and a tip (3) of the outer cylinder (1). By inserting it, a hole (5) for sliding is provided in the front part of the outer cylinder (1), and an operating portion (6) locked by the refill (2) in the hole (5) for sliding.
A rotor (7) slidably mounted on the rear end of the refill (2), a cam body (8) provided on the inner surface of the outer cylinder (1), and moved axially. Rotor (7)
A rotary cam mechanism (10) including a cam bar (9) that moves up and down by engaging with the cam is attached, and the cam bar (9) of the rotary cam mechanism (10) and the stopper portion (at the rear of the outer cylinder (1) ( 1
A ball-point pen formed by inserting a second elastic body (12) weaker than the elastic force of the first elastic body (4) between the first elastic body (1) and the first elastic body (4). 2. A movable body (13) is engaged with the refill (2) by locking the movable body (13) to the refill (2) so as to close the slide hole (5) of the outer cylinder (1). The ball-point pen according to claim 1, wherein the operation section (6) is provided integrally with or separately from the (13).