JPH0452072Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a writing instrument such as a sharp pencil or ballpoint pen that has a single writing shaft inside an outer cylinder, or a plurality of writing shafts of different colors or types. Relating to a composite writing instrument that is housed in one outer cylinder and allows each writing shaft to be freely selected and used, and in particular maintains the tip of the writing shaft in a state protruding from the tip of the outer cylinder,
The present invention relates to a stopper mechanism for a writing instrument that can retract the tip of the writing shaft by releasing the protruding state.

[Conventional technology]

The stopper mechanism of a conventional writing instrument includes, for example, a writing shaft 2 housed in an outer cylinder 1 as shown in FIG. When the notch part 3 is pressed against the return spring 4 of the writing shaft body 2, the actuating part 5 is brought into contact with the inner surface of the outer cylinder 1 by the actuating spring 16 in the storage hole 15 of the notch part 3. is inserted into the operating hole 11 provided in the outer cylinder 1 to keep the tip of the writing shaft 2 protruding from the tip of the outer cylinder 1.
When the operating portion 8 projected by the operating spring 17 is pushed into the operating hole 7 of the clip 6 facing the holder, the engagement between the operating portion 5 and the operating hole 11 is released, and the tip of the writing shaft 2 is removed. It is constructed so that it can be retracted into the cylinder 1 by the spring force of a return spring 4.

[Problem that the invention attempts to solve]

However, in the above conventional example, the operating portion 5, the operating portion 8, the operating spring 16, and the operating spring 1
There were problems in that it required many parts such as 7, making the configuration complicated and expensive.

[Means for solving problems]

In order to solve the above problems, the present invention integrates the actuating part 5 and the operating part 8, and the clip 6
By using the spring force of the actuating spring 16
The present invention aims to provide a stopper mechanism for a writing instrument that can be implemented at low cost by omitting the operating spring 17, reducing the number of parts, and simplifying the structure.

That is, the mechanism of the present invention accommodates the writing shaft 2 in the outer cylinder 1 as shown in the first figure, and by knocking the notch portion 3 against the return elastic body 4, the tip 2p of the writing shaft 2 is removed. The tip of the writing shaft body 2 is made to protrude from the tip of the outer tube 1, and this protruding state is maintained by the actuating portion 5 that engages between the outer tube 1 and the notch portion 3, and when the tip of the writing shaft body 2 is retracted from the outer tube 1. , a stopper mechanism for a writing instrument in which the tip of the writing shaft 2 can be retracted by pushing the operating portion 8 to release the engagement between the outer cylinder 1 and the knob portion 3 by the operating portion 5; 5 and the operation part 8 are integrated to form an operation operation part 9, and this operation operation part 9 is attached to the outer cylinder 1.
The actuating part 5 of the actuating operation part 9 protrudes from the outer cylinder 1, and the knob part 3 has an engagement hole 12 with which the actuating part 5 engages when the knob is operated.
In addition, the actuation operation part 9 is provided with a pressure receiving part 13 that comes into contact with the clip 6 and engages and disengages the actuation part 5 and the engagement hole 12 by or against the elastic force of the clip 6 when the operation part 8 is operated. This is a configuration in which the following is provided.

[Effect]

When the notch part 3 is clicked, the writing shaft 2 moves forward against the return elastic body 4, and the tip 2p of the writing shaft 2 protrudes from the tip of the outer cylinder 1.
Due to the movement of the knob part 3, the actuating part 5 of the operating part 9 rotates around the pivot shaft 10 against the elastic force of the clip 6 and is retracted from the actuating hole 11, and then the notch part 3 is engaged. The operating portion 5 engages with the hole 12 by rotating in the opposite direction about the pivot shaft 10 due to the elastic force of the clip 6, and the tip portion 2 of the writing shaft 2 is engaged.
p is maintained in a state protruding from the tip of the outer cylinder 1,
If you use a ballpoint pen, you can write in this state. Further, in the case of a mechanical pencil, by further knocking the notch portion 3, a known lead feeding mechanism is operated to perform centering and writing can be performed.

When the operating part 8 of the actuating operation part 9 is pushed in a state where the tip 2p of the writing shaft 2 is protruding, the actuating operating part 9 rotates about the pivot shaft 10 against the elastic force of the clip 6. , the engagement between the actuating portion 5 and the engagement hole 12 is released, and the writing shaft 2 moves rearward due to the elastic force of the return elastic body 4, and the tip 2 of the writing shaft 2 moves backward.
p will be retracted from the tip of the outer cylinder 1.

〔Example〕

Embodiments of the present invention will be described below based on the drawings. FIG. 1 is a sectional view of an embodiment of the mechanism of the present invention applied to a writing instrument.

In FIG. 1, reference numeral 1 denotes an outer cylinder, which is formed by screwing together a front part 1a and a rear part 1b. Outer cylinder 1
A writing shaft body 2 is provided inside. 4 is outer cylinder 1
A return spring 6 is inserted between the spring receiver 18a in the tip end of the writing shaft body 2 and the spring receiver 18b of the writing shaft body 2.
It is a clip that is attached removably.

Reference numeral 9 denotes an actuation operation part (see FIGS. 2a and b) held in the folded part 14 of the clip 6 and constructed by integrating the actuation part 5 and the operation part 8;
This actuation operation part 9 is rotatably supported by a pivot shaft 10 at the rear of the outer cylinder 1, and its operation part 8 protrudes from the operation hole 7 of the clip 6 (see Fig. 2b).
), the actuating portion 5 protrudes from the actuating hole 11 of the outer cylinder 1.

Reference numeral 3 denotes a knob consisting of an eraser holder 19 into which the rear end of the writing shaft 2 is inserted and locked to the rear end locking part 21 of the outer cylinder 1, and a cap 20 for the eraser 22 held by the eraser holder 19. It is. The eraser holder 19 of the knob portion 3 is provided with an engagement hole 12 into which the operating portion 5 engages when the knob is operated. Also, the operation operation section 9
There is a pressure receiving part 13 that comes into contact with the clip 6 and engages and disengages the operating part 5 and the engagement hole 12 by or against the elastic force of the clip 6 when the operating part 8 is operated.
is provided.

In the above configuration, the cap 20 of the knob portion 3
When you click , the writing shaft 2 moves forward (to the left in FIG. 1) via the eraser holder 19 against the return spring 4, and the tip 2p of the writing shaft 2 touches the outer cylinder 1.
The actuating part 5 of the actuating operation part 9 protrudes from the tip of the actuating part 5 of the actuating operation part 9 by moving the eraser holder 19 of the knob part 3.
is rotated clockwise around the pivot shaft 10 against the elastic force of the clip 6 and retracted from the operating hole 11, and then the engaging hole 12 provided in the eraser holder 19 of the knob portion 3 is retracted. Then, the operating portion 5 rotates around the pivot shaft 10 in the counterclockwise direction opposite to that described above due to the elastic force of the clip 6, and engages with the tip portion 2 of the writing shaft 2.
p is maintained in a state protruding from the tip of the outer cylinder 1,
In the case of the ballpoint pen shown in FIG. 1, writing can be done in this state. Furthermore, when a writing shaft for a sharp pencil is used as the writing shaft 2, centering is performed by further knocking the cap 20 of the knocking portion 3 to activate a known lead feeding mechanism.
Can be written down.

When the operating portion 8 of the actuator 9 is pushed in a state where the tip 2p of the writing shaft 2 is protruding, the actuator 9 rotates clockwise about the pivot shaft 10 against the elastic force of the clip 6. moving, the operating part 5 and the engagement hole 1
2 is released, the writing shaft 2 moves rearward (to the right) by the spring force of the return spring 4, and the tip 2p on the writing shaft retracts from the tip of the outer cylinder 1. become.

FIG. 3 is a sectional view when the mechanism of the present invention is applied to a composite writing instrument.

Inside the outer cylinder 1, there are a plurality of writing shafts 2a for a sharp pencil, one in the case of this embodiment, and two writing shafts 2b, 2 for ballpoint pens with different brush colors, red and black.
c (2c is on the other side of 2b), a total of three holding shafts 23a to 23c are provided, respectively.
is connected to.

Each of the holding shafts 23a to 23c is connected to each through hole 25 of the select sleeve 24 that is locked to the inner surface of the outer cylinder 1.
It is inserted in a to 25c. The receiving portion 26 of this select sleeve 24 and each holding shaft 23a to 23c
An elastic body for returning the holding shaft, for example, a coil spring 4a, is fitted between the holding shaft and the receiving portion 27 at the rear end.

A spherical base 30 of a select bar 29 that tilts due to its own weight is connected to a spherical receiving portion 28 at the center of the inner surface of the eraser holder 19 so as to be tiltable.
Between the opening edge of the spherical receiving part 28 and the receiving part 31 at the rear of the select sleeve 24, there is a notch part 3.
An elastic body, for example a coil spring 4b, is interposed to return the eraser holder 19 to the rear (to the right). Each writing shaft 2a is provided on the outer surface of the outer cylinder 1.
In order to facilitate the selection of items 2c to 2c, it is preferable to attach marks such as printing letters, symbols, etc. or engravings. The other configurations are exactly the same as in FIG. 1.

The writing shaft to be selected in the above configuration, for example, the writing shaft for a ballpoint pen whose brush color is black 2
When the outer cylinder 1 is horizontal with b facing downward, the select bar 29 tilts downward using the spherical receiving part 28 as a tilting fulcrum due to its own weight, and the ballpoint pen writing inserted into the through hole 25a on the lower side of the select sleeve 24 moves downward. The tip of the select bar 29 faces the holding shaft 23 of the shaft body 2b.

When the cap 20 of the knob part 3 is knocked in this state, the selection bar 29 will move to the desired writing shaft 2b.
The holding shaft 23b is pushed against the spring force of the holding shaft return coil spring 4a and the knot return coil spring 4b to make the tip of the writing shaft 2b protrude from the tip of the outer cylinder 1, and the eraser of the knob 3 is pushed. pedestal 1
9, the actuating part 5 of the actuating part 9 rotates clockwise about the pivot shaft 10 against the elastic force of the clip 6 and is retracted from the actuating hole 11, and then the actuating part 5 of the actuating part 9 is retracted from the actuating hole 11. The operating portion 5 engages with the engagement hole 12 provided in the eraser holder 19 by rotating around the pivot shaft 10 in the counterclockwise direction opposite to the above due to the elastic force of the clip 6. The tip 2p of the writing shaft 2b is maintained in a state protruding from the tip of the outer cylinder 1, and since the writing shaft 2b selected in this way has a black brush color, it is possible to write in black.

When the operating part 8 of the actuating operation part 9 is pushed in a state in which the tip of the ballpoint pen writing shaft 2b is protruding, the actuating operating part 9 moves clockwise about the pivot shaft 10 against the elastic force of the clip 6. , the engagement between the actuating part 5 and the engagement hole 12 is released, and the notch part 3, that is, the eraser holder 19, the eraser 22 held therein, and the cap 20 are released by the spring of the coil spring 4b for returning the knob part. The force causes the writing shaft 2b to move backward (to the right) and return to its original state, and in response, the writing shaft 2b also moves together with the holding shaft 23b as well as the holding shaft return coil spring 4a.
Due to the spring force, it moves rearward (to the right) and returns to its original state, and the tip of the writing shaft 2b is retracted from the tip of the outer cylinder 1.

The other writing shafts 2a and 2c can be similarly selected and used with their tips protruding from the tip of the outer cylinder 1. When the writing shaft is a sharp pencil, the lead can be drawn out in a known manner by knocking the cap 20 of the knock portion 3 with the tip of the writing shaft 2a for the sharp pencil protruding.

In addition, when the lead and ink of the writing shaft 2a for a sharp pencil and the writing shafts 2b and 2c for black and red ballpoint pens are used up, the outer cylinder 1 is separated into a front portion 1a and a rear portion 1b. If it is a ballpoint pen, replace it with a new one, and replace each holding shaft 23a to 23.
c and then screw the front part 1a and the rear part 1b together again.

According to the compound writing instrument to which the mechanism of the present invention is applied, it is a so-called sliding method in which the writing shaft is selected and used by operating the knob with the writing shaft to be selected facing downward.
The number of writing axes is not limited to two,
It can be applied to a larger number of writing axes, and the brush color,
Not only can different types of writing shafts be used, but also a shaft selection mechanism consisting of a select sleeve 24, a select bar 29, two return elastic bodies 4a and 4b, and an actuating operation section 9 is used, so the number of parts used can be reduced. The structure is relatively simple, there is no interference between the writing shafts, the assembly is easy, and it can be implemented at low cost.

[Effect of idea]

As is clear from the above description, according to the present invention, the actuating portion 5 and the operating portion 8 are integrated into the actuating portion 9, and the spring force of the clip 6 is utilized to separate the actuating spring and the operating portion. Since springs are not needed, the number of parts can be significantly reduced.
This has the effect that the configuration can be implemented simply and at low cost.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of an embodiment of the mechanism of the present invention applied to a writing instrument, and Figures 2a and 2b are perspective views showing an example of the operating section of the present invention, and the operating section is held in a clip. FIG. 3 is a sectional view when the mechanism of the present invention is applied to a composite writing instrument, and FIG. 4 is a sectional view when an example of the conventional mechanism is applied to a writing instrument. 1... Outer tube, 2... Writing shaft, 2a... Writing shaft for sharp pencil, 2b, 2c... Writing shaft for ballpoint pen, 2p... Tip, 3... Knot, 4... Return 4a... Elastic body (coil spring) for returning the holding shaft, 4b... Elastic body (coil spring) for returning the knot portion, 5... Operating portion,
6...Clip, 7...Operation hole, 8...Operation part, 9...Operation operation part, 10...Pivot shaft, 11...
...Operating hole, 12...Engagement hole, 13...Pressure receiving part,
14...Folding section.

Claims (1)

[Claims for Utility Model Registration] (1) Put the writing shaft 2 into the outer cylinder 1, and remove the tip 2p of the writing shaft 2 by knocking the notch 3 against the return elastic body 4. When the writing shaft body 2 is made to protrude from the tip of the barrel 1, this protruding state is maintained by the actuating portion 5 that engages between the outer barrel 1 and the notch portion 3, and the tip of the writing shaft body 2 is retracted from the outer barrel 1. In the stopper mechanism of a writing instrument, the tip of the writing shaft body 2 can be retracted by pushing the operating part 8 to release the engagement between the outer cylinder 1 and the knob part 3 by the operating part 5.
and the operation part 8 are integrated to form the operation operation part 9.
The operating portion 9 is rotatably supported on the outer cylinder 1, the operating portion 5 of the operating portion 9 protrudes from the outer cylinder 1, and the actuating portion 5 is attached to the knob portion 3 when the knob is operated. The operating part 9 is provided with an engaging hole 12 in which the clip 6 is engaged, and when the operating part 8 is operated, the operating part 5 and the engaging hole 12 are provided with the elastic force of the clip 6 or against the elastic force. A stopper mechanism for a writing instrument, which is provided with a pressure receiving part 13 for engaging and disengaging the writing instrument. (2) A stopper mechanism for a writing instrument as set forth in claim 1, which is comprised of a clip 6 having an operating hole 7 and an operating operating portion 9 held inside the clip 6.