JPH0245034Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a compound writing instrument in which three writing fonts, at least one of which is a knock-type pencil, are alternately protruded.

Conventionally, structures such as a pendulum type and a full-circumference rotating cam type are known for this type of writing instrument. In the case of the pendulum method, not only does the stroke of the knocking rod become large, which impairs the appearance, but when selecting a cursive writing type, there is a drawback that the operation is cumbersome, as you have to check the display on the barrel and tilt it before hitting. In the case of the rotating cam method, it is unknown which cursive letters the cam is located between, so it is necessary to rotate the cam and make the cursive letters stick out to confirm, and then select the desired cursive letters and make them stick out. There was a drawback that it was time consuming. In addition, conventional double writing instruments have a structure that stores all the cursive writing when carried, so there is no risk of staining clothes, such as a sharp pencil, and even cursive writing that does not need to be stored is necessary because it can be stored when carrying. A structure was required to ensure that the cursive writing protruded, which was a factor in increasing costs. Especially for users who use sharp pencils frequently, there are many opinions that it is actually more convenient to keep the sharp pencil in a protruding state even when carrying the device.

The purpose of the present invention is to provide a compound writing instrument that solves the above-mentioned problems.It houses three writing instruments, at least one of which is a knock-type sharp pencil, and a cylindrical cam is connected to these three writing instruments. The cylindrical cam can be rotated approximately 120 degrees to the left and right around the state in which the cylindrical cam protrudes the lock-type sharp pencil, and the cylindrical cam is rotated to the left and right to its maximum angle. It is characterized by being configured so that the other two cursive pencils can be selectively protruded from each other. Under normal conditions, the lock-type sharp pencil is left in the protruding state, and can be used as it is by clicking the knob, and the other two cursive pencils can be protruded. When using a cursive cam, the cylindrical cam is rotated approximately 120 degrees to the left and right to select and project the desired cursive.

The illustrated embodiment will be described below.

First, the sliding grooves 1, 1', 1'' in the axial direction are
Guide tubes 2 provided every 120 degrees are integrally fixed to the tip shaft (not shown) in the rotation direction, and at least one of the slide grooves 1, 1', and 1'' is provided with a lock type sharp pencil 3, respectively. Sliding piece 4 at the rear end of the
Three writing bodies 3, 5, and 6 with 4' and 4'' inserted therein are fitted so as to be able to slide freely in the axial direction, and a circumferential cam slope is formed on the front surface of the outer periphery of the rear end of this guide tube 2. A cylindrical cam 10 having a cylindrical cam 10 having a cylindrical cam 10 connected to a rear end thereof is rotatably attached to the cap 8 so as to be integral with the cap 8 in the rotational direction and movable in the axial direction. Under normal conditions (when carried), the notch 11 provided at the tip of the cam slope 7 of the cylindrical cam 10 engages with the protrusion 12 of the sliding piece 4 of the sharpening pencil 3, and the sharpening pencil 3 is moved. The tip of the brush is kept in a state in which it protrudes from the tip opening of the tip shaft.At this time, the cylindrical cam 10 moves back and forth to enable the tip to be drawn out by a knob operation. is slidably fitted into an axial longitudinal groove 14 provided on the outer circumferential surface of the rear end of the guide tube 2.The guide tube 2 has an angle of approximately 120 degrees to the left and right on the circumference around the longitudinal groove 14. A circumferential groove 15 perpendicular to the longitudinal groove 14 is formed in communication with the longitudinal groove 14 up to the rotated position, and the cylindrical cam 10 is rotated to move its collar portion 13 along the circumferential groove 15 and rotate approximately 120 degrees. The notch 11 of the cam slope 7 is used for sliding pieces 4' of writing bodies 5, 6 other than the sharp pencil 3.
4'' projections 12', 12''. As a result, when selecting another cursive 5 or 6, it is only necessary to rotate it to the left or right.

In addition, 16, 16', 16'' in the figure are each cursive 3,
5, 6 and sliding pieces 4, 4',
4'' is shown to bring the return spring into contact with the cam slope 7 of the cylindrical cam 10.

In the above embodiment, the flange 13 is provided on the inner surface of the cylindrical cam 10, and the guide cylinder is provided with a circumferential groove 15 into which the flange fits and moves, and the angle of the circumferential groove 15 is approximately
The rotation angle of the cylindrical cam 10 is limited by forming the cylindrical cam at 120 degrees, but the rotation angle of the cylindrical cam is limited by controlling the alternate rotation angle between the cap to which the cylindrical cam is fixed and the tip shaft. Examples are also possible.

The present invention is constructed as described above, and in the normal state, the sharp pencil is in the protruding state and can be used for writing by pressing the knob.When using another writing style, the cylindrical cam can be moved approximately 120 degrees to either the left or right direction. Since the desired cursive font can be projected simply by rotating, the cursive font can be quickly selected and used, making it extremely convenient to use.

Furthermore, since the sharp pencil is maintained in a protruding state during normal times, a structure for selecting a cursive character is not required, thereby simplifying the internal mechanism and making it easier to manufacture.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a vertical cross-sectional view of the main part, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a cross-sectional view taken along line A-A in Fig. 1. FIG. 1, 1', 1''...Sliding groove, 2...Guide tube, 3
...Sharp pencil, 4,4',4''...Sliding piece, 5,6...Other cursive writing, 7...Cam slope, 8
... Cap, 9 ... Knob bar, 10 ... Cylindrical cam, 11 ... Notch, 12 ... Protrusion, 13 ... Flange, 14 ... Vertical groove, 15 ... Circumferential groove, 16,1
6', 16''...Return spring.

Claims (1)

[Scope of utility model registration request] Three writing bodies, at least one of which is a sharpening pencil, are stored, a cylindrical cam is engaged with the three writing bodies, and the shape is centered around the state in which the sharpening pencil is protruded by the cylindrical cam. The cylindrical cam can be rotated approximately 120 degrees left and right, and by rotating the cylindrical cam to the maximum angle in each direction, the other two writing fonts can be selectively projected. A double writing instrument.