JPS6351120B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention makes it possible to shorten the length of the main body of the writing part, thereby making it possible to incorporate accessories such as a digital clock into the barrel of a sharp pencil and ballpoint pen. It relates to dual-use writing instruments.

A dual-purpose writing instrument that can selectively project the writing body of a sharp pencil or a ballpoint pen from the tip of the barrel requires a mechanism for ejecting the writing body and a mechanism for feeding out the lead of the sharp pencil. The lead core is fed out by clicking a button that protrudes from the rear end of the barrel.
Since the protruding mechanism and the feeding mechanism are built in, so to speak, in series, the length of the writing part body becomes long, and it is therefore difficult to incorporate accessories such as a digital clock into the rear end of the barrel.

Therefore, by adopting the structure described in the scope of claims, the present invention arranges the protruding mechanism and the feeding mechanism in parallel, thereby making it possible to shorten the length of the main body of the writing part. This allows accessories to be easily assembled into the rear end of the barrel.

Embodiments of the present invention will be specifically described below with reference to the drawings.

The front shaft 1 is a cylindrical body that houses a sharp pencil refill 2 and a ballpoint refill 3 therein, and has an opening through which the writing parts at the tips of these refills 2 and 3 can selectively protrude during writing. The tip of the cylinder 4 is removably and non-rotatably fitted into the end opening. As shown in FIGS. 3 and 4, the cylinder 4 has two inner holes 41a and 41b penetrated therein, and a wide cut groove 42 spaced 180 degrees apart in the axial direction from the rear end.
A and a small cut groove 42b in width are provided, and each communicates with the inner hole 41a and the inner hole 41b. Furthermore, a rotation stopper 43 for regulating the rotation angle of the cylindrical cam 6, which will be described later, is provided protruding from the outer peripheral surface. The actuator 5a to which the rear end of the sharp pencil refill 2 is connected is connected to the inner hole 41a with which the wide cut groove 42a communicates, and the actuator 5a is connected to the other inner hole 4.
An actuator 5b to which the rear end of the ballpoint pen reflex reel 3 is connected is housed in 1b so as to be movable back and forth, and cam followers 51 of these actuators 5a, 5b protrude outside from the cut grooves 42a, 42b. The actuators 5a and 5b are urged rearward by the spring 12. As shown in FIG. 5, the front portion of the cylindrical cam 6 is cut obliquely to form a mountain shape, and both of these inclined surfaces abut against two cam followers 51 that protrude outside the cylinder 4 as cam surfaces 61. It is placed on the cylinder 4 so as to be rotatable by a predetermined angle. A window hole 62 is provided on the side of the axis including the cam apex 63, into which a slide member 8, which will be described next, is slidably mounted, and a digital watch 1 as an accessory is provided at the rear.
1 mounting portions are provided in series. As shown in FIG. 6, the slide member 8 is provided with a knock slide button 81 in the center of the main body, the base end of which is connected to the main body so as to be swingable in a direction perpendicular to the axis. As shown in FIG. 7, this slide member 8 is engaged with a groove formed by the cylindrical cam 6 and the rear shaft 7, and by pushing the knob slide button 81 protruding from the rear shaft 7 in the axial direction with your fingertip. It seems to slide. Furthermore, the width of the knob slide button 81 is the cut groove 4.
It is smaller than that of the cut groove 2a and larger than that of the cut groove 42b, so that it can only swing into the inner hole 41a when pressed from the side. The actuator 5a connected to the sharpening pencil refill 2 is provided with an inner hole 52, and the actuating pin 9 is inserted through the inner hole 52, and its tip is inserted into the sharpening pencil refill 2 through the lid 91. The rear end of the tool can be pressed. The inside of this reflex pencil 2 has the same structure as a conventionally known knock-type mechanical pencil, and the lead case 2 that constitutes the inner tool
When 2 is pressed and moved forward, a chuck mechanism (not shown) is released and the lead core is fed out. A tail crown 10 is connected to the rear end of the operating pin 9, and the rear end surface 10a is the tip surface 81a of the knob slide button 81 that swings and enters when the writing part of the sharp pencil refill 2 is in the writing position. I'm starting to come face to face with. A cylindrical cam 6 is fixed to the inside of the rear shaft 7 by caulking or the like, and when the rear shaft 7 is rotated with respect to the front shaft 1, the cylindrical cam 6 is rotated with respect to the cylinder 4. As mentioned above, the knob slide button 81 protrudes from the window hole provided on the side of the rear shaft 7, and the digital clock 11 is attached to the rear part.

In the writing instrument for both sharp pencil and ballpoint pen with the above configuration, when the cam followers 51 of both actuators 5a and 5b are in abutment with the midsection of the cam surface 61, the writing portions at the tips of both reflexes 2 and 3 are both retracted into the front shaft 1, but when the rear shaft 7 is rotated, the actuator 5b connected to the ballpoint pen refill 3 is pressed by the cam surface 61 and moves forward, so that it touches the apex 63 of the cylindrical cam 6. When the cam follower 51 collides, the protrusion of the writing part is completed as shown in FIG. At this time, the knob slide button 81, which is disposed on the axis including the apex 63 of the cylindrical cam 6, is located on the cut groove 42b, but because its width is larger than that of the cut groove 42b, it is not inserted into the inner hole 41b. It is impossible to intrude, and the knock slide button 81 cannot be clicked.

Next, in order to write with a sharp pencil, the rear shaft 7 only needs to be rotated in the opposite direction.
b move forward and backward relative to each other, and when the cam follower 51 of the actuator 5a collides with the apex 63, the protrusion of the writing portion of the sharp pencil refill 2 is completed as shown in FIG. At this time, the knock slide button 81 is located on the cut groove 42a, and when you knock the knock slide button 81 with your fingertip and simultaneously apply force to slide it downward, the tip surface appears as shown by the imaginary line in FIG. 81a faces the rear end surface 10a and is pressed forward to feed out the lead core as described above.

In this way, in the present invention, the sliding member is slidably attached to the side surface of the cylindrical cam, and the protruding mechanism of the writing part and the feeding mechanism of the lead lead are arranged in parallel, so that the length of the main body of the writing instrument can be shortened. Even if accessories such as a digital clock are attached to the rear end of the shaft, the overall length can be kept within the range that can be used as a writing instrument. Furthermore, since the size relationship between the widths of the nok slide button and the two cut grooves is set, the nok slide button can be operated only when writing with a sharp pencil with a simple configuration. And since the operating pin directly presses the inner part of the sharp pencil to move it forward, the spring that biases the refill backwards is not involved in the operation of feeding out the lead lead, and the knob slide button can be slid very easily, and even slightly. If the button is swung in this direction, the tip of the knob slide button will face the tail crown, which has the advantage of reducing the amount of protrusion from the rear shaft.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views of embodiments of the present invention;
The figure is a cross-sectional view of the cylinder, and Figure 4 is Figure 3.
5 is a perspective view of the cylindrical cam, and 6 is a sectional view taken along the line.
The figure is a perspective view of the slide member, and FIG. 7 is a partially omitted main part sectional view. 1...Front shaft, 2...Sharp pencil refill, 3...Ballpoint pen refill, 4...Cylinder, 41a, 41b...Inner hole, 42a, 42b
... Cut groove, 5a, 5b ... Operator, 51 ... Cam follower, 6 ... Cylindrical cam, 61 ... Cam surface, 62 ... Window hole, 7 ... Rear shaft, 8 ... Slide member, 81 ... ...Knotslide button, 9...Operating pin, 10...Tail crown, 11...Digital clock, 12
……spring.

Claims (1)

[Claims] 1. A front shaft for storing the writing parts of sharp pencils and ballpoint pens so as to move back and forth alternately between the writing position and the storage position, and the tip of the front shaft is non-rotatably fitted into the rear end opening of the front shaft, and 2 The inner hole of the book is penetrated, and a cylinder is provided with cut grooves having different widths in the axial direction from the rear end facing each other so as to communicate with the inner hole, and a cam follower protrudes outside from each of the cut grooves. two actuators that are slidably built into the cylinder; a knock-type sharp pencil refill that is connected to the actuator that slides in the cut groove with a larger width; A connected ballpoint pen reflex reel,
A spring biased to move the actuator backward with respect to the cylinder, a substantially beveled tip edge forming a cam surface that abuts the cam follower, and a window on the side surface on the axis including the cam apex. a cylindrical cam provided with a hole and rotatable at a predetermined angle with respect to the cylinder; and a knock slide having a width smaller than the larger one of the two cut grooves and larger than the smaller width. a slide member whose base end of the button is integrally attached so as to be swingable in a direction perpendicular to the axis, and whose both ends are slidably attached to the window hole of the cylindrical cam so as to be slidable in the axial direction; an actuating pin that is inserted into the inner hole of the child and whose tip can press the rear end of the inner part of the sharp pencil refill, and a tip end surface of a knock slide button that is fixed to the rear end of the actuating pin and whose rear end surface is notched. A writing instrument for dual use as a sharp pencil and a ballpoint pen, comprising a tail crown facing the cylindrical cam, a rear shaft rotatable with respect to the front shaft, in which the cylindrical cam is fixed, and a knob slide button slideably protrudes from the side. .