JPH0217914Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a dual-action writing instrument with a clock that stores one sharp pencil and another writing body in one shaft, and also has a built-in clock. .

(Prior Art) Conventionally, a guide tube having an axial groove is fixed to a leading shaft, and two writing bodies each having a sliding piece fixed to the rear end, at least one of which is a sharp pencil, are inserted into the groove of the guide tube. A cylindrical cam with a circumferential cam slope displacing in the axial direction is installed inside the cap so that it rotates in the circumferential direction integrally and is movable in the axial direction, and the cap is attached to the front shaft. The cylindrical cam is assembled rotatably, the cylindrical cam is placed on the outer periphery of the guide cylinder, the sliding piece is brought into contact with the cam slope, and the cap is rotated to move the sliding piece back and forth along the cam slope of the cylindrical cam. Accordingly, a compound writing instrument is known in which the tip writing portions of two cursive writing bodies can be selectively retracted and retracted from the tip end opening of the tip shaft. When adding a clock to such a dual-action writing instrument, conventionally the clock was arranged at a position behind the cylindrical cam inside the cap. As a result, the cap became extremely long relative to the front shaft, resulting in poor balance in appearance and difficulty in rotating the cap relative to the front shaft.

(Problem to be solved by the invention) As a means of solving the above-mentioned drawbacks of the conventional example, the length of the cap is reduced by moving most of the cylindrical cam into the front shaft and arranging almost only the clock inside the cap. This configuration was considered. However, when the cylindrical cam is housed in the front shaft, the outside diameter of the front shaft increases, making it difficult to hold and damaging the appearance.In order to avoid an increase in the outside diameter of the front shaft, the wall thickness of the cylindrical cam should be reduced as much as possible. It is required to make it smaller.
In addition to the thickness of the cylindrical cam, it is also necessary to set the amount of radial protrusion of the portion of the sliding piece fitted into the groove of the guide cylinder that contacts the cam slope of the cylindrical cam, that is, the portion that protrudes outside the groove, to be small. , the difference between the outer diameter dimension of the groove in the guide tube in the width direction (circumferential direction) and the outer diameter dimension in the depth direction (radial direction) of the groove becomes small, so that the sliding piece has a nearly circular cross-sectional shape. As shown in Figure 9, the sliding piece 2
When a circumferential force is applied to 2 by the cam slope of the cylindrical cam, the sliding piece 22 rotates smoothly from the state of A to the state of B inside the groove 4 of the guide cylinder 1. This resulted in the inability to move forward.

Therefore, the present invention is extremely useful by incorporating two cursive fonts, at least one of which is a sharp pencil, and a built-in clock, and the cap does not become significantly longer than the tip. It has good balance in appearance and operability, and also avoids problems such as the thicker outer diameter of the tip shaft, which makes it difficult to hold and spoils the appearance. To provide a double writing instrument with a clock which can prevent a guide cylinder from rotating inside a groove even when subjected to a force in the circumferential direction, and thereby has a good ability to feed out a writing instrument.

(Means for Solving the Problems) In order to achieve the above object, the double writing instrument of the present invention has two writing instruments with sliding pieces 22, 22' fixed to the rear ends and at least one of which is a sharp pencil 11. , attached to a guide tube 1 having grooves 4 and 5 for slidably guiding the same cursive in the axial direction,
A circumferential groove 2 is provided in the outer surface of the rear portion of the guide tube 1, and a collar portion 48 protruding from the inner surface of the cylindrical cam 6 is fitted into the circumferential groove 2, so that the cylindrical cam 6 is attached to the guide tube 1. The outer periphery can rotate approximately 180° in the circumferential direction,
Further, a circumferential cam slope 7 that is displaceable in the axial direction is provided on the front end edge of the cylindrical cam 6, and the sliding pieces 22, 22' are brought into contact with the cam slope 7 to rotate the cylindrical cam 6, thereby causing the sliding movement. The movable pieces 22, 22' are moved back and forth to make the tip writing parts of the two cursives located in the tip shaft 20 fixed to the guide tube 1 selectively retractable at the tip tip opening of the tip shaft. With the tip writing portion 11 protruding from the tip opening of the tip shaft, the collar portion 48 of the cylindrical cam 6 is positioned in the vertical groove 3 provided so as to communicate with one end of the circumferential groove 2 of the guide tube 1. In this writing instrument, the lead of the sharp pencil 11 can be drawn out by enabling reciprocating movement in the axial direction of the cap 14, which is rotatable in the circumferential direction with respect to the tip shaft 20 and also movable in the axial direction. A casing 25 with a clock module 24 incorporated therein is housed and fixed,
Further, most of the cylindrical cam 6 including the cam slope 7 is housed within the front shaft 20 on the outer periphery of the guide cylinder 1, and only the rear end portion is protruded to the rear of the front shaft 20 and is integrally attached to the inner surface of the cap 14. In the sliding pieces 22, 22' fitted into the grooves 4, 5 of the guide cylinder 1, grooves 4, 5 are formed in the parts that protrude outside the grooves 4, 5 and come into contact with the cam slope 7 of the cylindrical cam 6. It is characterized by providing a protruding portion 23 that engages with the edge of the opening.

(Example) Examples will be described with reference to the drawings.

First, the guide tube 1 is provided with axial grooves 4 and 5 that are open on both opposite sides, and has a circumferential circumferential groove 2 on the outer surface of the rear end and an axial vertical groove 3 (a groove 3) communicating with one end of the circumferential groove 2. (See Figure 5). The sharpening pencil 11 and the ballpoint pen 13 each have sliding pieces 22 and 22' attached to their rear ends, and are fitted into the respective grooves 4 and 5 of the guide tube 1. The guide tube 1 has its front end inserted into and engaged with the joint tube 16, so that it cannot move in the axial direction and cannot rotate in the circumferential direction.
The front end of the joint cylinder 16 is press-fitted into a relay cylinder 17, and the relay cylinder 17 is press-fitted into the inner surface of the front end of a mounting cylinder 18 arranged on the outer periphery of the joint cylinder 16 and the guide cylinder 1. Rib 1 provided on the outer surface
9 is press-contacted to the inner surface of the tip shaft 20 and is detachably fixed thereto, and the rear end of the tip shaft 20 is brought into contact with the front end of a stopper 21 fixed to the outer surface of the rear end of the mounting tube 18.
Therefore, the guide tube 1 is fixed to the front shaft 20 via the joint tube 16, the relay tube 17, and the mounting tube 18. A cylindrical cam 6 is disposed on the outer periphery of the guide tube 1 and inside the mounting tube 18. The cylindrical cam 6 is provided with a circumferential cam slope 7 along its front edge that is displaceable in the axial direction, and has a collar 48 (see FIG. 1) protruding from its inner surface, and a spring 39 is attached to the cam slope 7. ,3
The sharpening pencil 11 urged rearward by the shaft 9' is brought into contact with the sliding pieces 22, 22' of the ballpoint pen 13, and its collar 48 is fitted into the circumferential groove 2 of the guide tube 1. Most of the cylindrical cam 6, including the cam slope 7, is housed inside the mounting cylinder 18, and only its rear end protrudes to the rear of the mounting cylinder 18, and the protruding part is press-fitted into the inner surface of the front end of the cap 14. ing. Therefore, the cap 14 and the cylindrical cam 6
Both rotation in the circumferential direction and movement in the axial direction are integral. Note that the rear end of the front shaft 20 is also inserted into the cap with some freedom. A stopper 15 is fixed to the inner surface of the rear end of the cylindrical cam 6. The rotation of the cylindrical cam 6 is restricted by the collar portion 48 of the cylindrical cam 6 colliding with the side wall A9 (see FIG. 6) and the side wall B10 at both circumferential ends of the circumferential groove 2 of the guide tube 1. It can be rotated within a range of approximately 180° in the circumferential direction. In a state where the collar portion 48 of the cylindrical cam 6 is in abutment with one side wall A9 of the circumferential groove 2, the collar portion 4
8 is located in the vertical groove 3, and the cylindrical cam 6 is located in the guide cylinder 1.
At this time, the notch 8 provided at the frontmost end of the cam slope 7 of the cylindrical cam 6
engages with the cam protrusion 40 of the sliding piece 22 of the sharp pencil 11, and the tip writing portion of the sharp pencil 11 protrudes from the tip opening of the tip shaft as shown in FIG. Therefore, if the cylindrical cam 6 is knocked forward by operating the cap 14 in this state, the lead will be drawn out by the chuck mechanism built into the sharp pencil 11. The distance that the cylindrical cam 6 can move forward is the distance α between the front end of the stopper 15 and the rear end of the guide tube 1 (see FIG. 1). Cylindrical cam 6
When in the non-knocked state, the collar 48 is in contact with the rear end wall of the vertical groove 3 by the force of the spring 39. Note that the distance α in which the cylindrical cam 6 can move forward is smaller than the distance β from the rear end wall of the vertical groove 3 to the flange introduction groove 49 provided so as to communicate with the front end of the vertical groove 3, as shown in FIG. It is set. Therefore, after the flange 48 is fitted into the vertical groove 3 through the flange introduction groove 49 and the stopper 16 is fixed to the cylindrical cam 6, the flange 48 will not come out of the flange introduction groove 49. When the cylindrical cam 6 is rotated forward and to the left from a state where the collar portion 48 is located in the vertical groove 3, the collar portion 48 is guided by the guide side wall 12 of the circumferential groove 2 as shown in FIG. First, move forward by γ in the axial direction and rotate the required angle to move the sharpening pencil 1.
1 is recessed, and then further rotation is continued until the collar portion 48 abuts against the other side wall B10 of the circumferential groove 2 and then stops. The tip writing portion of the ballpoint pen 13 is engaged with the moving piece 22' and protrudes from the tip opening of the tip shaft. Incidentally, since the above-mentioned distance α in which the cylindrical cam can move forward is set slightly larger than the distance γ in the axial direction of the guide side wall 12 (see FIG. 5), the sharp pencil 11 is retracted and then the ballpoint pen 13 is retracted. In the protruding state, both cylindrical cams 6
It became almost impossible to move forward with the sharp pencil 1.
1 is housed in the tip shaft 20, the lead is prevented from being drawn out due to the knock pressure. From this state, if the cylindrical cam 6 is turned forward and then reversely rotated to the right, it will operate in the opposite manner to the above and return to the state shown in FIG. 1 again. A casing 25 incorporating a clock module 24 is housed and fixed at a rear position of the cylindrical cam 6 inside the cap 12, a bushing 26 is fixed to the rear end of the casing 25, and a clip 27 is attached to the rear end of the bushing 26. The mounting portion is abutted, and the battery case 31, which passes through the mounting portion of the clip 27 and is screwed onto the bush 26, is further abutted at the rear end. Of course, a battery 32 is housed in the battery case 31, and a cover 33 that allows battery replacement is removably screwed onto the rear end.Furthermore, in front of the battery 32 are a contact piece 29, a contact spring 28, and an insulating material 30. is stored. The casing 25 housing the clock module 24 is provided with a window and a transparent frame plate 35 is fitted therein, and the side of the cap 14 is also provided with a window facing the window of the casing 25 as shown in FIG. A window portion 34 is opened so that a time display portion 36 of the clock module 24 can be visually recognized through the window portion 34. In addition, 46 in the figure is a time adjustment button, 4
7 indicates a date/time switching button.

By the way, since the structure is such that the cylindrical cam 6 is housed inside the mounting cylinder 18 inside the front shaft 20, the front shaft 20
In order to prevent this, the wall thickness of the portion of the cylindrical cam 6 located on the outer periphery of the guide tube 1 is set to be extremely small. Correspondingly, in the sliding pieces 22, 22' fitted into the grooves 4, 5 of the guide cylinder 1, a portion protrudes outside the grooves 22, 22' and comes into contact with the cam slope 7 of the cylindrical cam 6 (a cam is attached to the rear end). The amount of protrusion of the cam projection 40 that engages with the notch 8 of the slope 7 is also set small. For this reason, sliding piece 2
The cross-sectional shape of the grooves 2 and 22' is approximately circular, with a small difference between the outer diameter of the grooves 4 and 5 in the width direction, that is, the circumferential direction, and the outer diameter of the grooves 4 and 5, in the depth direction, that is, the radial direction. ing. Therefore, when a circumferential force is applied by the cam slope 7 of the cylindrical cam 6, the sliding pieces 22, 2
2' can easily rotate inside the grooves 4 and 5,
In order to prevent this, a protruding portion 23 that engages with the opening edge of the grooves 4 and 5 is provided at the part of the sliding piece 22, 22' that protrudes to the outside of the grooves 4 and 5 (see Fig. 3), and this is rotated. It is used as a stopper.
In addition, the tensioning part 23 is attached to the sliding piece 2 as shown in the figure.
It is not necessary to provide it on both sides of 2 and 22'.
It may be provided only on the side opposite to the side of the cylindrical cam 6 that contacts the cam slope 7.

FIG. 7 shows another embodiment, in which a flat notch 37 is provided at the opening edge of the groove in which the protruding parts 23 of the sliding pieces 22, 22' engage, and the inner surface of the protruding parts 23 is provided. It is also made flat.

FIG. 8 shows still another embodiment, in which a step groove 38 is provided at the opening edge of the groove in which the protruding parts 23 of the sliding pieces 22, 22' engage, and the inner surface of the protruding parts 23 is provided with a stepped groove 38. is fitted into this step groove 38.

In the above embodiment, the mounting tube 18 is removably fixed inside the front shaft 20.
If the structure is such that the relay tube 17 is directly fixed to the inner surface of the tip barrel 20 and a removable cap is arranged at the front end of the tip barrel 20 without using the mounting tube 18, the length of the tip barrel 20 will be reduced by the amount excluding the mounting tube 18. There is an advantage in that the outer diameter can be further reduced.

In the figure, 41 is a core pipe of the sharpening pencil 11, 42 is a tail plug that fits into the rear end of the core pipe 41,
43 is a receiving pipe for fixing the ballpoint pen 13; 44
45 indicates a tail plug that fits into the rear end of the receiving pipe 43, and 45 indicates an opening at the rear end of the groove 4.

(Operation and Effect) The present invention is as described above. First, most of the cylindrical cam is housed in the front shaft, and the rear end of the cylindrical cam and watch components such as the watch module and casing are housed inside the cap. Since the cap is retracted, the cap does not become significantly longer than the tip shaft, resulting in better balance in appearance and operability. Next, even if the wall thickness of the cylindrical cam housed in the tip shaft is made small and the amount of protrusion of the part of the sliding piece fitted into the groove of the guide cylinder that protrudes to the outside of the groove is set to be small accordingly,
The tension part provided on the sliding piece prevents the sliding piece from rotating when a circumferential force is applied to the sliding piece by the cam slope of the cylindrical cam. can be kept in good condition.
As mentioned above, there is no problem even if the thickness of the cylindrical cam and the amount of protrusion of the groove of the guide tube to the outside of the sliding piece are set small, so it is possible to suppress the increase in the outer diameter of the tip shaft. It is easy to hold and can be set to an appropriate size without spoiling the appearance.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a partial sectional view showing the whole, Fig. 2 is a plan view of the whole, Fig. 3 is a sectional view taken along the line A-A in Fig. 1, and Fig. 4 is a sectional view of the whole. 5 is a side view of the rear end of the guide cylinder, FIG. 6 is a sectional view taken along line B-B in FIG. 5, and FIGS. 7 and 8 are main parts of other embodiments. FIG. Further, FIG. 9 is a sectional view of a main part of a conventional example. 1... Guide cylinder, 2... Circumferential groove, 3... Vertical groove,
4, 5...Groove, 6...Cylindrical cam, 7...Cam slope, 11...Sharp pencil, 13...Ballpoint pen, 14...Cap, 16...Joint cylinder, 18
... Mounting cylinder, 20 ... Front shaft, 22, 22' ... Sliding piece, 23 ... Harnessing part, 24 ... Clock module, 25 ... Casing, 31 ... Battery case, 36 ... Time display Part, 37... Flat notch, 38... Step groove, 39, 39'... Spring,
48...Brim part, 49...Brim part introduction groove.

Claims (1)

[Scope of utility model registration request] A guide cylinder having grooves 4 and 5 for slidingly guiding two writing pieces in the axial direction, each of which has sliding pieces 22 and 22' fixed to its rear end and at least one of which is a sharp pencil 11. 1, a circumferential groove 2 is provided in the outer surface of the rear portion of the guide tube 1, and a collar portion 48 protruding from the inner surface of the cylindrical cam 6 is fitted into the circumferential groove 2, so that the cylindrical cam 6 can be mounted. The guide tube 1 is rotatable approximately 180 degrees in the circumferential direction on the outer periphery of the cylindrical cam 1, and a circumferential cam slope 7 displaceable in the axial direction is provided on the front end edge of the cylindrical cam 6. Frame 22,
22' are brought into contact and the cylindrical cam 6 is rotated to move the sliding pieces 22, 22' back and forth, thereby drawing the tip writing parts of the two writing bodies located within the tip shaft 20 fixed to the guide cylinder 1. The sharp pencil 1 can be selectively retracted and retracted from the tip opening of the tip shaft.
With the tip writing portion of the tip protruding from the tip opening of the tip shaft, the collar portion 48 of the cylindrical cam 6 is positioned in the vertical groove 3 provided so as to communicate with one end of the circumferential groove 2 of the guide tube 1. In this writing instrument, the lead of the sharp pencil 11 can be drawn out by enabling reciprocating movement in the axial direction of the cap 14, which is rotatable in the circumferential direction with respect to the tip shaft 20 and also movable in the axial direction. A casing 25 with a clock module 24 incorporated therein is housed and fixed, and most of the cylindrical cam 6, including the cam slope 7, is housed in the front shaft 20 on the outer periphery of the guide cylinder 1, and only the rear end is housed. It protrudes rearward of the tip shaft 20 and is integrally inserted and fixed into the inner surface of the cap 14, and is inserted into the groove 4 of the guide tube 1,
In the sliding pieces 22, 22' fitted in the grooves 4,
5. A dual-action writing instrument with a clock, characterized in that a bulging portion 23 is provided at a portion of the cylindrical cam 6 that protrudes to the outside and comes into contact with the cam slope 7 of the cylindrical cam 6 to engage with the opening edges of the grooves 4 and 5.