JPS6217265Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a writing instrument that has two writing units, at least one of which uses a Knock-type sharp pencil, and can be used selectively.

Conventionally, writing instruments have been proposed in which two writing units are selectively projected into a writing position along a cam, or both writing units are retracted together into a storage position. This type of writing instrument has a sliding piece attached to the rear end of the writing unit to move the writing instrument forward and backward along the cam, but this sliding piece is attached so as to close the rear end of the writing unit. When the writing unit is a retractable mechanical pencil, replenishing the lead is extremely troublesome.

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. A writing instrument that can be used for different purposes, making it convenient for office work, etc., and convenient for carrying, and the writing unit, which is a lock-type pencil, can be easily reinforced with a lead. is to provide.

In order to achieve such an object, the present invention supports two writing units, each of which uses a lock-type sharp pencil on at least one side, inside an outer case so as to be able to reciprocate between a writing position and a storage position. Sliding pieces are attached to the ends at approximately 180 degrees apart, a guide is fixed inside the outer case to guide the sliding pieces of each writing unit so that they can only slide, and a cam for moving the sliding pieces forward and backward is fixed inside the outer case. is provided rotatably with respect to the guide, and a spring attached to each writing unit urges each sliding piece and writing unit toward the cam side, and a core is attached to the sliding piece of the writing unit using the lock type sharp pencil. A hole for inserting the core is formed, the hole for inserting the core is communicated with a notch for inserting the core formed in the guide, and the notch of the guide is configured to open toward the knob cover side. It is something to do.

Hereinafter, one embodiment of the present invention will be specifically described based on the drawings. In this embodiment, a ballpoint pen is used for one of the writing units, and a click-type sharp pencil is used for the other. As shown in FIGS. 1 to 3, the outer case 1 includes a front shaft 3 with a tapered end and an opening 2 at the front end, a rear shaft 5 with a clip 4 on the rear side, and a positioning cylinder 6. Consists of. In this outer case 1, a positioning cylinder 6 is fitted inside the tip of the rear shaft 5, and the positioning cylinder 6 is rotatably fitted to the rear side of the front shaft 3.

Two writing units 7 and 8 are supported within the outer case 1 so as to be able to reciprocate between a writing position and a retracted position. Among these writing units 7 and 8, one writing unit 7 is constructed as a ballpoint pen, and the other writing unit 8 is constructed as a knob-type sharp pencil. In the writing unit 8, a lead case pipe 10 is slidably and removably fitted inside the rear part of the main body 9, and as the lead case pipe 10 moves forward or backward, the chuck and fasteners incorporated into the main body 9 are removed. It is configured such that the lead I can be made to protrude from the mouthpiece 11 of the main body 9 by advancing or retracting a lead feeding mechanism (not shown) such as the above.

A sliding piece 12 is attached to the rear end of the writing unit 7 and the rear end of the lead case pipe 10 of the writing unit 8. The details of this sliding piece 12 are particularly detailed in the fourth section.
As is clear from FIGS. A to C, a fitting hole 13 is bored from one side in the axial direction, and a core insertion hole 14 is formed following the fitting hole 13. A projection 15 is provided at the center of the upper arcuate surface of the sliding piece 12, and is driven by a cam surface 27 of a cylindrical cam 26, which will be described later.
As shown in FIG. 1, this sliding piece 12 has its fitting hole 13 fitted into the rear end of the writing unit 7 and the outside of the rear end of the core case pipe 10 of the writing unit 8. The lead insertion hole 14 of the sliding piece 12 is communicated with the lead case pipe 10 (the sliding piece 12 has the same structure for both the writing units 7 and 8, but as in this embodiment, the writing unit 7 When a ballpoint pen is used, the lead insertion hole 14 of the sliding piece 12 used in the writing unit 7
Very good. ).

A guide 16 is provided inside the rear part of the outer case 1. This guide 16 is molded from a synthetic resin with excellent elasticity, and as is particularly clear from FIGS. A spring receiver 18 that projects slightly inward is provided, a collar 19 is provided on the outer periphery of the front side, and a projection 20 is provided on the outside of the front end. A locking member is provided on the outside of the central portion of the rear end plate 21 in a protruding manner along the axial direction. As this locking member, a notch groove is formed in the boss and a pair of locking pieces 22 are provided, a locking rib 23 is provided at the base of one of the locking pieces 22, and a tip of each locking piece 22 is provided with a locking rib 23. A locking projection 24 is provided. End plate 21
A notch 25 for inserting the core is formed in the outer peripheral portion of the guide groove 17 so as to communicate with one of the guide grooves 17 . This guide 1
6, as shown in FIG. 1, the front outer periphery of the collar 19 is press-fitted into the inside of the fitting tube 46 and fixed by the protrusion 20, and the fitting tube 46 is press-fitted into the inside of the tip shaft 3 and fixed removably. , a collar 19 is held between the positioning cylinder 6 and the inner stepped portion of the rear shaft 5. A sliding piece 12 attached to each of the writing units 7 and 8 is inserted into each guide groove 17 of the guide 16 so that it can only slide with its driven protrusion 15 separated by approximately 180 degrees.
The driven protrusion 15 of each sliding piece 12 has a guide groove 17.
It is projected outward. The lead insertion hole 14 of the sliding piece 12 attached to the writing unit 8, which is a knock-type mechanical pencil, communicates with a lead insertion notch 25 formed in the end plate 21 of the guide 16.

A cylindrical cam 26 is fitted inside the rear shaft 5 of the outer case 1 on the outside of the guide 16. As is particularly clear from FIGS. 6A to 6E, this cylindrical cam 26 has a cam surface 27 formed diagonally on the circumference for advancing and retracting the sliding piece 12, and a flat surface 28 on the top of the cam surface 27. is formed. A fan-shaped positioning ridge 30 is provided in the circumferential direction on the inner side of the middle part of the cylindrical cam 26 from the top flat surface 28 of the cam surface 27 to the terminal end 29. is provided with a projection 31 for indexing the rotational angle, and both sides of the projection 31 are formed so as to widen from the distal end to the proximal end. One or more anti-rotation grooves 33 are formed along the axial direction in the large diameter portion 32 on the outer periphery of the intermediate portion of the cylindrical cam 26 . Therefore, the rotation prevention groove 3 of this cylindrical cam 26
3 is engaged with a protrusion 34 provided inside the rear shaft 5 as shown in FIGS. 1 and 3, so that the cylindrical cam 26 can rotate integrally with the rear shaft 5 relative to the guide 16. , and is supported so as to be movable in the axial direction with respect to the guide 16 and the rear shaft 5. A compression spring 35 attached to each writing unit 7, 8 is connected to the guide 1.
6 is interposed between the spring receiver 18 and the sliding piece 12, and due to the elasticity of this compression spring 35, the sliding piece 12
and writing units 7 and 8 are biased rearward. Therefore, by rotating the rear shaft 5 and the cylindrical cam 26 in any direction, the driven protrusion 15 of the sliding piece 12 is moved along the cam surface 27, and the writing tip of each writing unit 7 and 8 is selectively moved. It can be made to protrude from the opening 2 of the tip shaft 3 to the writing position.

The cylindrical body 36 for indexing the rotation angle of the cylindrical cam 26 supported by the guide 16 is particularly shown in FIGS.
As is clearer, a collar 37 is provided on the outer periphery of the rear end, and on the front side of the collar 37 are recesses 38a to 38 for first to third rotation angle indexing at three locations approximately every 90 degrees.
c is formed. These recesses 38a to 3
The cylindrical cam 8c 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 31 of the cylindrical cam 26. A positioning ridge 39 is provided at the front end of the cylinder 36 between the recesses 38a and 38c and has a generally fan-shaped positioning ridge 39 in the circumferential direction on the opposite end of the recess 38b. In cooperation with the positioning protrusion 30 of the cylindrical cam 26, the rotation angle of the cylindrical cam 26 can be regulated to approximately 180 degrees. Further, a notch 40 is formed on the front side of the cylindrical body 36 to be engaged with the locking rib 23 of the guide 16.
A notched groove 41 for inserting a core is formed along the axial direction on the outside of the opposite end of the recess 38b. This cylindrical body 36 is connected to the cylindrical cam 2 as shown in FIGS. 1 and 3.
6, the inner hole is fitted into the locking piece 22 of the guide 16 by utilizing its elastic deformation, and the locking protrusion 24 is engaged with the rear end surface of the cylinder body 36 to prevent it from coming out. , the notch 40 of the cylindrical body 36 is engaged with the locking rib 23 of the locking piece 22. That is, the barrel 36 is mounted in fixed relation to the guide 16. Therefore, any of the recesses 38a to 38c of the cylinder body 36
is engaged with the protrusion 31 of the cylindrical cam 26. In the illustrated state, the recess 38a is engaged with the protrusion 31,
As will be described later, the writing unit 7 is extended to the writing position, and the writing unit 8 is retracted to the storage position. In this state, the lead insertion hole 14 of the sliding piece 12 attached to the writing unit 8 and the lead insertion notch 25 of the guide 16 are connected to the lead insertion notch 4 of the cylinder body 36.
1 and are connected to each other. That is, the core insertion hole 1
4 is open toward a knock cover 44, which will be described later. An eraser 43 with a stopper 42 is fitted inside the rear protrusion of the cylindrical cam 26, and a knob cover 4 is fitted around the outer circumference of the rear side of the cylindrical cam 26.
4 are removably fitted.

Next, the mode of use of the present invention will be explained. now,
As shown in FIGS. 1 and 3, the driven protrusion 15 of the sliding piece 12 of the writing unit 7 is brought into contact with the top flat surface 28 of the cylindrical cam 26, and the protrusion 31 of the cylindrical cam 26 is used for indexing the rotation angle. First recess 3 of cylinder 36
8a, one side 30a of the positioning protrusion 30 of the cylindrical cam 26 abuts one side 39a of the positioning protrusion 39 of the cylindrical body 36, and the writing unit 7
The writing tip of is projected from the opening 2 of the tip shaft 3 to the writing position, the driven protrusion 15 of the other sliding piece 12 is in contact with the terminal end 29 of the cam surface 27, and the writing unit 8 is retreated to the storage position. shall be taken as a thing. Thus, writing and other tasks can be performed using the writing unit 7.

When the rear shaft 5 and the cylindrical cam 26 are forcibly rotated in the clockwise direction in FIG. 3 from this state, the protrusion 3
1 is removed from the first recess 38a of the cylinder 36 and the cylindrical cam 26 rotates approximately 90 degrees, the protrusion 31 is forced into the second recess 38b of the cylinder 36 by the elasticity of the compression spring 35. mated. This cylindrical cam 26
As the writing unit 7 in the writing position rotates, the driven protrusion 15 of the sliding piece 12 is moved to the cam surface 27.
The writing unit 8 in the storing position is guided by the cam surface 27 with the driven protrusion 15 of the sliding piece 12 moving forward to approximately the same position as the writing unit 7. Therefore both writing units 7,
8 can be stored. Further, when the rear shaft 5 and the cylindrical cam 26 are forcibly rotated from this state in the clockwise direction in FIG. The cylindrical cam 26 is omitted.
The positioning protrusion 30 of the cylindrical cam 26 is rotated 90 degrees.
The other side surface 30b is a positioning protrusion 39 for the cylindrical body 36.
When the protrusion 31 comes into contact with the other side surface 39b, the protrusion 31 is forcibly fitted into the third recess 38c. As the cylindrical cam 26 rotates, the writing unit 8 in the storage position moves forward to the writing position as shown in FIG. 2 with the driven protrusion 15 of the sliding piece 12 being guided by the cam surface 27. On the other hand, writing unit 7 has its sliding piece 1.
The second driven protrusion 15 is guided by the cam surface 27 and further retreats. From this state, the knob cover 44 is pressed to move the cylindrical cam 26, sliding piece 12, and writing unit 8 forward against the elasticity of the compression spring 35. As the writing unit 8 moves forward, when the rear step 45 of the cap 11 comes into contact with the inner edge of the opening 2 of the outer case, the lead case pipe 10 moves forward as described above, which causes the lead feeding mechanism inside the main body 9 to move forward. do. On the contrary, by releasing the pressing force of the knock cover 44, the writing unit 8, the sliding piece 12, the cylindrical cam 26, and the knock cover 44 return to their original positions due to the elasticity of the compression spring 35, and the lead feeding mechanism inside the main body 9 also retreats. Therefore, by knocking the knock cover 44, the lead l can be successively projected from the cap 11 to perform writing or other tasks.

In this way, the protrusion 31 of the cylindrical cam 26 is attached to the cylindrical body 36.
By selectively engaging the first and third recesses 38a and 38c of the cylindrical cam 26, the writing unit 7 or 8 can be selectively projected to the writing position. Both writing units 7 and 8 can be stored by engaging with the second recess 38b, and at this time, the protrusion 31 and the first to third recesses 38a to 38c are switched with moderation and positioned. The protruding position and storage position of the writing unit can be recognized by hearing and tactile sensation.

Also, by removing the knob cover 44 and the eraser 43 from the cylindrical cam 26, the core l can be inserted into the notch groove 41 of the cylindrical body 38, the notch 25 of the guide 16, and the sliding piece 12.
The lead can be replenished into the lead case pipe 10 of the writing unit 8 through the lead insertion hole 14 . Or tip axis 3
from the fitting tube 46, and remove the main body 9 of the writing unit 8.
By removing the core l from the core case pipe 10,
can also be replenished into the core case pipe 10.

Incidentally, in the above embodiment, the cylinder body 3 for rotation angle indexing is
Since the cylinder body 36 is formed thick, a notch groove 41 for inserting the core is formed in the cylinder body 36.
If the notch groove 41 is formed thinly, the notch groove 41 does not need to be formed. Further, in the embodiment described above, both writing units 7 are configured as ballpoint pens, and writing unit 8 is configured as a click-type mechanical pencil. It is also possible to use different leads, such as, etc., and in short, it is sufficient to use a knot-type sharp pencil for at least one of them. In the above embodiment, the cylindrical cam 26 is provided with a positioning protrusion 31, and the cylindrical body 36 is provided with recesses 38a, 38b, and 38c that selectively engage with the protrusion 31. 38a, 3
8b and 38c can be omitted, so if you use a knock-type pencil pencil for both as described above,
Only the notch 25 for inserting the core of the guide 16 (the cylinder 36
(if the cylinder is thin), or the notch 25 and the notch groove 41 for inserting the core of the cylinder 36 (if the cylinder 36 is thick)
may be provided symmetrically at two locations. Further, the cylindrical cam 26 may be provided integrally with the rear shaft 5 to support the rear shaft 5 slidably with respect to the front shaft 3.
may also be provided so as to be rotatable relative to the rear shaft 5.

As is clear from the above explanation, according to the present invention, two writing units each using a lock-type sharp pencil on at least one side are supported inside the outer case so as to be movable back and forth between the writing position and the storage position. Sliding pieces are attached to the rear ends of the writing units approximately 180 degrees apart, and a guide is fixed inside the outer case to guide the sliding pieces of each writing unit so that they can only slide, and the sliding pieces move forward inside the outer case. A retreating cam is rotatably provided with respect to the guide, and a spring attached to each writing unit urges each sliding piece and writing unit toward the cam. Therefore, the two writing units can be selectively protruded to the writing position along the cam and used for different purposes, making it easier to perform office work and carry the device. In addition, a hole for inserting a lead is formed in the sliding piece of a writing unit using a knock-type mechanical pencil, and this hole for inserting a lead is communicated with a notch for inserting a lead formed in the guide. Since it is open toward the knock cover side, there are advantages such as the ability to easily and quickly carry out core replenishment work.

[Brief explanation of drawings]

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 side view of the sliding piece used for this, Figure B is a rear view,
Figure C is a bottom view, Figure 5A is a plan view of the guide used in the present invention, Figure B is a sectional view taken along the line VB-VB in Figure A, and Figure C is a sectional view taken along the line VC-VC in Figure A. Cross-sectional view, Figure D is a front view of Figure C, Figure E is a rear view of Figure C,
Figure F is a partial bottom view, Figure 6A is a bottom view of the cylindrical cam used in the present invention, Figure B is its front view, Figure C
7A is a sectional view taken along line C-C in Figure A, Figure D is a rear view of Figure C, Figure E is a sectional view taken along line E-E in Figure B, and Figure 7A shows the rotation used in the present invention. A sectional view of the angle indexing cylinder, FIG. 1B is a front view, and FIG. 1C is a rear view. 1... Outer case, 2... Opening, 3... Tip shaft, 5
... Rear axis, 7, 8 ... Writing unit, 12 ......
Sliding piece, 15... Follower projection, 16... Guide, 17... Guide groove, 26... Cylindrical cam, 27
...Cam surface, 36...Cylinder for rotation angle indexing.

Claims (1)

[Scope of utility model registration request] Inside the outer case, two writing units with a lock-type sharp pencil on at least one side are supported so as to be movable back and forth between the writing position and the storage position, and a sliding piece is provided at the rear end of each writing unit approximately 180 degrees apart. a guide for guiding the sliding piece of each writing unit in a slidable manner is fixed in the outer case, and a cam for advancing and retracting the sliding piece is provided in the outer case so as to be rotatable with respect to the guide; A spring attached to each writing unit urges each sliding piece and writing unit toward the cam side, and a hole for inserting the lead is drilled in the sliding piece of the writing unit using the knock-type sharp pencil. A writing instrument characterized in that a hole for inserting a lead is communicated with a notch for inserting a lead formed in the guide, and the notch of the guide opens toward the knob cover side.