JPS6217264Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a writing instrument in which two writing units, at least one of which uses a knurled mechanical pencil, can be used for different purposes.

Conventionally, writing instruments have been proposed in which two writing units are selectively projected into a writing position, or both writing units are retracted into a storage position. Since this conventional writing instrument does not have a means for positioning the writing unit in the writing position and the storage position, it is not possible to confirm these positions by touch or the like, which is inconvenient. Also, if both writing units cannot be positioned in the storage position, both writing units may not be stored securely after use.In this case, when storing the writing unit in a chest pocket, etc. There was a risk that the writing unit would rotate about the shaft and protrude into the writing position, and the lead or the like would stain clothing.

The purpose of the present invention is to selectively protrude two writing units, each of which uses a knock-type sharp pencil on at least one of them, to a writing position, such as a two-color lock-type mechanical pencil or a combination of a lock-type sharp pencil and a ballpoint pen. The writing unit, which is a lock-type mechanical pencil, can be easily opened by locking the rear protrusion of the internal mechanism. The lead can be fed out, and the lead can be positioned at the selective writing position of each writing unit and the storage position of both writing units, and these positioning states can be recognized by tactile sensation, etc., and both writing units can be positioned. By positioning it in the storage position, both writing units can be stored securely after use, and when the writing unit is placed in a chest pocket, etc., it is possible to prevent clothing from being soiled by the core of the writing unit. To provide the best writing utensils.

In order to achieve such an objective, the present invention has two writing units, each of which uses a lock-type sharp pencil at least on one side, located inside an outer case in which the rear shaft is rotatably connected to the front shaft, in a writing position and a storage position. Supported so that it can reciprocate, approximately 180 mm is attached to the rear end of each writing unit.
The sliding pieces are installed at intervals, and the guide that guides the sliding pieces of each writing unit so that they can only slide is fixed inside the outer case to the tip shaft, and the sliding pieces are placed inside the outer case for forward and backward movement. A cylindrical cam having a cam surface is supported relative to the guide so as to be rotatable together with the rear shaft of the outer case and movable in the axial direction relative to the guide and the rear shaft, and is attached to each writing unit. Each sliding piece and writing unit are urged toward the cam surface side of the cylindrical cam by a spring, and a cylindrical body for indexing the rotation angle of the cylindrical cam is attached to the guide. It is provided with recesses corresponding to the selective writing position of each writing unit by rotation and the storage position of both writing units, and projections that can be selectively engaged with these recesses. Each writing unit can be selectively projected to a writing position by moving each sliding piece along the cam surface by rotation of the cam, and can be positioned at that position by knocking the rear of the cylindrical cam. This is characterized in that it is constructed so that the lead of the writing unit, which is a knock-type mechanical pencil, can be drawn out.

Hereinafter, one embodiment of the present invention will be specifically described based on the drawings. As shown in FIGS. 1 to 3, the outer case 1 has a tapered tip, a front shaft 3 having an opening 2 at the tip, a rear shaft 5 with a clip 4 on the rear side, and an inner shaft inside the rear shaft. It consists of a cylinder 6 and a positioning cylinder 7. In this outer case 1, a rear shaft inner cylinder 6 is fitted inside a rear shaft 5, and the rear shaft inner cylinder 6 is fitted into the rear shaft inner cylinder 6 as shown in FIGS.
Notch groove 9 formed along the axial direction as shown in
The base of the clip 4 is inserted into the rear part of the clip 4 to prevent it from rotating, and a cylinder 7 is positioned inside the tip of the rear shaft 5.
is fitted, and the rear side portion of the front shaft 3 is rotatably fitted inside the positioning cylinder 7.

Inside the outer case 1 are two writing units 10 and 1.
1 is supported so as to be able to reciprocate between a writing position and a storage position. These writing units 10 and 11 are each constructed as a knock-type mechanical pencil.
That is, a core case pipe 13 is slidably and removably fitted inside the rear part of the main body 12, and as the core case pipe 13 moves forward or backward, the chuck, fasteners, etc. built into the main body 12 can be drawn out. The mechanism (not shown) is configured to move forward or backward to cause the core l to protrude from the base 14 of the main body 12.

Lead case pipe 1 for each writing unit 10 and 11
A sliding piece 15 is attached to the rear end of 3. The details of this sliding piece 15 are particularly clear from FIGS. 5A to 5C, in which a round bar-shaped fitting part 17 is provided protruding from the front side of the piece main body 16, and a small diameter part 18 is formed at the base of the fitting part 17. has been done. The top surface of the main body 16 is formed into an arcuate surface, and a projection 19 that follows a cam surface 31 of a cylindrical cam 30, which will be described later, is provided at the center of this arcuate surface. As shown in FIG. 1, this sliding piece 15 has a fitting portion 17 connected to the core case pipe 1.
3, and the rear end of the core case pipe 13 is caulked to the small diameter portion 18 and is integrally attached thereto.

A guide 20 is provided inside the rear part of the outer case 1. This guide 20 is molded from a synthetic resin with excellent elasticity, and the details thereof are particularly clear from FIGS. 6A to 6E, in which guide grooves 21 are formed at approximately 180 degrees apart along the axial direction, and a guide groove 21 is formed at the tip. A spring receiver 22 that protrudes slightly into the inside of the spring 21 is provided, a collar 23 is provided on the outer periphery of the front side, and a projection 24 is provided on the outside of the front end. A boss 26 is provided on the outer periphery of the rear end plate 25 to protrude along the axial direction, and the boss 26 is formed so as to extend beyond the notch groove 27 . A locking rib 28 is provided at the base of the boss 26, and a locking protrusion 29 is provided at the outer periphery of the tip of the boss 26. This guide 20 is connected to the collar 23 as shown in FIG.
The front outer periphery of the projection 2 is press-fitted into the inside of the fitting tube 8.
4, a fitting cylinder 8 is press-fitted inside the front shaft 3 and is removably fixed, and a collar 23 is held between the positioning cylinder 7 and the rear shaft inner cylinder 6. A sliding piece 15 attached to each of the writing units 10 and 11 is inserted into each guide groove 21 of the guide 20 so that it can only slide with its driven protrusion 19 separated by approximately 180 degrees. Follower protrusion 19 of each sliding piece 15
protrudes outward from the guide groove 21.

A guide 20 is installed inside the rear shaft inner cylinder 6 of the outer case 1.
A cylindrical cam 30 is fitted on the outside. This cylindrical cam 30 moves the sliding piece 15 forward in an oblique direction on the circumference, as is particularly clear from FIGS. 7A to 7E.
A cam surface 31 for retraction is formed, and a flat surface 32 is formed on the top of the cam surface 31. Cylindrical cam 30
A fan-shaped positioning protrusion 33 is provided in the circumferential direction at the center of one side from the tip 32 of the cam surface 31 to the terminal end 36 on the inner side of the middle part of the cam surface 31, and on the rear side of the center part of the positioning protrusion 33 is provided a positioning protrusion 33 for indexing the rotation angle. A protrusion 34 is provided, and both sides of the protrusion 34 are formed so as to gradually widen from the distal end to the proximal end. Further, a locking projection 35 is provided on the outside of the cylindrical cam 30. Then, the locking protrusion 35 of this cylindrical cam 30 is inserted into the middle part of the notch groove 9 of the rear shaft inner cylinder 6, as shown in FIGS. 1 and 3, and the cylindrical cam 3
0 is supported so that it can rotate together with the rear shaft inner cylinder 6 and the rear shaft 5 with respect to the guide 20, and can move in the axial direction with respect to the guide 20, the rear shaft inner cylinder 6 and the rear shaft 5. There is. The compression spring 37 attached to each writing unit 10, 11 is connected to the spring receiver 22 of the guide 20.
and the main body 16 of the sliding top 15, and the elasticity of this compression spring 37 urges each sliding top 15 and the writing units 10 and 11 rearward. Therefore, the rear shaft 5, the rear shaft inner cylinder 6, and the cylindrical cam 30
By rotating the sliding piece 1 in any direction,
By moving the driven protrusion 19 of No. 5 along the cam surface 31, each writing unit 10 and the writing tip No. 11 can be selectively projected from the opening 2 of the tip shaft 3 to the writing position. The different uses of writing units 10 and 11 can be easily recognized from the outside.
That is, for example, as shown in FIG. 2, a window 46 is formed in the intermediate portion of the rear shaft 5, the rear shaft inner cylinder 6, and the cylindrical cam 30, and a window 46 is formed on the outer circumferential surface of the guide 20 at a selective protruding position of each writing unit 10 and 11. A window 46 displays a display 47 showing the core diameter, color, etc. of the writing unit.

The cylindrical body 38 for determining the rotation angle of the cylindrical cam 30 supported by the guide 20 is particularly shown in FIGS.
As is clearer, a collar 39 is provided on the outer periphery of the rear end, and on the front side of the collar 39 are recesses 40a to 40 for first to third rotational angle indexing at three locations approximately every 90 degrees.
c is formed. These recesses 40a to 4
0c is formed so that both sides gradually widen from the rear end to the front end, so that it can easily and selectively engage with the protrusion 34 of the cylindrical cam 30. A sector-shaped positioning protrusion 41 is provided in the circumferential direction on the opposite end of the recess 40 b, and is located between the recesses 40 a and 40 c at the front end of the cylinder 38 . The rotation angle of the cylindrical cam 30 can be regulated to approximately 180 degrees in cooperation with the positioning protrusion 33 . Further, a notch 42 is formed in the front side of the cylindrical body 38 to be engaged with the locking rib 28 of the guide 20.
This cylindrical body 38 is inserted into the inside of the cylindrical cam 38 as shown in FIGS. The locking protrusion 29 is engaged with the rear end surface to prevent it from coming off, and the notch 42 of the cylinder body 38 is inserted into the boss 26.
is engaged with the locking rib 28 of. That is, the cylindrical body 38
are mounted in fixed relation to the guide 20. Any recess 40a to 4 of this cylinder 38
The protrusion 34 of the cylindrical cam 30 is engaged with 0c,
In the illustrated state, the projection 34 is engaged with the recess 40a. An eraser 44 with a stopper 43 attached is fitted inside the rear protrusion of the cylindrical cam 30,
A knock cover 45 is removably fitted to the outer periphery of the rear side of the cylindrical cam 30.

Next, the mode of use of the present invention will be explained. now,
As shown in FIGS. 1 and 3, the writing unit 10
The driven protrusion 19 of the sliding piece 15 is connected to the cylindrical cam 30.
The projection 34 of the cylindrical cam 30 is engaged with the first recess 40a of the rotation angle indexing cylinder 38, and the one side surface 33a of the positioning projection 33 of the cylindrical cam 30 is brought into contact with the flat end surface 32 of the cylindrical cam 30. The positioning projection 41 of the cylindrical body 38 is brought into contact with one side 41a of the positioning projection 41, and is projected from the opening 2 of the writing tip 3 of the writing unit 10 to the writing position, and the driven projection 19 of the other sliding piece 15 is brought into contact with the cam surface 31. It is assumed that the terminal end 36 is abutted and the writing unit 11 is retracted to the storage position. From this state, press the knob cover 45, and press the cylindrical cam 30.
The sliding piece 15 and writing unit 10 are compressed by a compression spring 3.
Move forward against the elasticity of 7. writing unit 10
When the rear step part 48 of the base 14 comes into contact with the inner edge of the opening 2 of the outer case 1, the core case pipe 13 moves forward as described above, and as a result, the main body 1
The core feeding mechanism in 2 moves forward. On the contrary, by releasing the pressing force of the knock cover 45, the writing unit 10, the sliding piece 15, the cylindrical cam 30, and the knock cover 45 return to their original positions due to the elasticity of the compression spring 37, and the lead feeding mechanism inside the main body 12 also retreats. Therefore, by knocking the knock cover 45, the lead l is successively protruded from the tip of the cap 14, thereby making it possible to perform tasks such as writing. Further, when the rear shaft 5, the rear shaft inner cylinder 6, and the cylindrical cam 30 are forcibly rotated from this state in the clockwise direction in FIG. When the cylindrical cam 30 rotates approximately 90 degrees, the projection 34 is forcibly fitted into the second recess 40b of the cylindrical body 38 due to the elasticity of the compression spring 37. As the cylindrical cam 30 rotates, the driven protrusion 19 of the sliding piece 15 of the writing unit 10 in the writing position is guided by the cam surface 31 and retreats to the storage position, and the writing unit 11 in the storage position moves back to the storage position. Sliding piece 15
The driven protrusion 19 is guided by the cam surface 31 and advances to approximately the same position as the writing unit 10. Therefore, both writing units 10 and 11 can be accommodated.
Further, when the rear shaft 5, the rear shaft inner cylinder 6, and the cylindrical cam 30 are forcibly rotated in the clockwise direction in FIG.
More detached. When the cylindrical cam 30 rotates approximately 90 degrees and the other side surface 33b of the positioning projection 33 of the cylindrical cam comes into contact with the other side surface 41b of the positioning projection 41 of the cylindrical body 38, the projection 34 is forced into the third recess 40c. It is fitted exactly. As the cylindrical cam 30 rotates, the writing unit 11 in the storage position advances to the writing position with the driven protrusion 19 of the sliding piece 15 guided by the cam surface 31. On the other hand, writing unit 10
The driven protrusion 19 of the sliding piece 15 is on the cam surface 3.
1 and retreat further. Therefore, by knocking the knock cover 45 as described above, the lead l can be successively protruded from the cap 14 to perform writing or other operations. In this way, the protrusion 34 of the cylindrical cam 30 is inserted into the first and third recesses 40a and 4 of the cylindrical body 38.
selectively protruding writing unit 10 or 11 into a writing position by selectively engaging 0c;
You can use different cores of different colors, hardness, etc.
By engaging the protrusion 34 of the cylindrical cam 30 with the second recess 40b of the cylindrical body 38, both writing units 10
and 11 can be stored, and at this time, the protrusion 34
and the first to third recesses 40a to 40c can be selectively switched and positioned, and the protruding position and storage position can be recognized by hearing and tactile sensation. Further, the lead l can be replenished by removing the tip shaft 3 from the fitting tube 8 and removing the main body 12 from the lead case pipe 13.

Incidentally, in the above embodiment, both writing units 10,
Although the writing unit 11 is configured as a click-type mechanical pencil, a ballpoint pen may be used for either one of the writing units 10 or 11. In short, a click-type mechanical pencil may be used for at least one of the writing units 10 or 11.

As is clear from the above description, according to the present invention, two writing units each using a locking type sharp pencil on at least one side are placed at the writing position inside an outer case in which the rear shaft is rotatably connected to the front shaft. A guide that supports the writing units so that they can reciprocate in the storage position, and that sliding pieces are attached to the rear end of each writing unit at approximately 180 degrees apart, and that guides the sliding pieces of each writing unit so that they can only slide inside the outer case. is fixed to the front shaft, and a cylindrical cam equipped with a cam surface for advancing and retracting the sliding piece is supported in the outer case so as to be able to rotate integrally with the rear shaft of the outer case. Since each sliding piece and writing unit are biased toward the cam surface side of the cylindrical cam by the spring attached to the writing unit, the two writing units can be selectively moved to the writing position by rotating the rear shaft and the cylindrical cam. It can be protruded and used for different purposes, making it easier to handle paperwork and to carry around. Further, by knocking the rear protrusion of the internal mechanism, the lead of the writing unit, which is a knock-type mechanical pencil, can be easily drawn out. Further, the smooth cam is supported so as to be movable in the axial direction with respect to the guide and the rear shaft, a cylindrical body for indexing the rotation angle of the cylindrical cam is attached to the guide, and the cylindrical cam is attached to the cylindrical body and the cylindrical cam. Since there are recesses corresponding to the selective writing position of each writing unit by rotation and the storage position of both writing units, and projections that can be selectively engaged with these recesses, each writing unit can be It is possible to selectively position the writing unit in the writing position, and also to position both writing units in the storage position, and to recognize these positioning states by tactile sensation, etc., and to use the writing unit by positioning both writing units in the storage position. After that, both writing units can be reliably stored, and there are advantages such as being able to prevent clothes from being soiled by the core of the writing unit when the writing unit is placed in a chest pocket or the like.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the writing instrument of the present invention, Fig. 2 is a side view, Fig. 3 is a sectional view taken along the - arrow in Fig. 1 with the clip removed, and Fig. 4 A is a cross-sectional view of the writing instrument of the present invention. A plan view of the rear shaft inner cylinder used for
Figure C is a sectional view, Figure 5A is a plan view of the sliding piece used in the present invention, Figure B is a side view, Figure C is a rear view, and Figure 6A is a plan view of the guide used in the present invention. ,
Figure B is a sectional view taken along the line B-B in Figure A, and Figure C is
is a sectional view taken along the line C-C in Figure A, Figure D is a front view of Figure C, Figure E is a rear view of Figure C, and Figure 7A is
is a bottom view of the cylindrical cam used in the present invention, B is a front view thereof, C is a cross-sectional view taken along the line C-C of A in the same figure, D is a rear view of C in the same figure, and E is a rear view of the cylindrical cam used in the present invention. 8A is a sectional view of the rotation angle indexing cylinder used in the present invention, FIG. 8B is a front view, and FIG. 8C is a rear view. 1... Outer case, 2... Opening, 3... Tip shaft, 5
... Rear shaft, 6 ... Rear shaft inner cylinder, 10, 11 ... Writing unit, 15 ... Sliding piece, 19 ... Follower projection, 20 ... Guide, 21 ... Guide groove, 30 ...
... Cylindrical cam, 31... Cam surface, 38... Cylindrical body for rotation angle indexing.

Claims (1)

[Scope of utility model registration request] Inside the outer case, the rear shaft is rotatably connected to the front shaft, two writing units each having a lock type sharp pencil on at least one side are supported so as to be movable back and forth between a writing position and a storage position. Sliding pieces are attached to the rear end approximately 180 degrees apart, and a guide that guides the sliding pieces of each writing unit so that they can only slide inside the outer case is fixed to the tip shaft. A cylindrical cam having a cam surface for advancing and retracting the moving piece is supported relative to the guide so that it can rotate together with the rear shaft of the outer case and can move in the axial direction with respect to the guide and the rear shaft. , each sliding piece and writing unit are urged toward the cam surface side of the cylindrical cam by a spring attached to each writing unit, a cylindrical body for indexing the rotation angle of the cylindrical cam is attached to the guide, and this cylindrical body and the cylindrical The cam is provided with recesses corresponding to the selective writing positions of each writing unit by rotation of the cylindrical cam and the storage positions of both writing units, and protrusions that can selectively engage with these recesses. A writing instrument characterized by: