JP3638966B2 - Refill device and writing instrument - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a refill device used as an internal mechanism of a writing instrument such as a sharp pencil, a ballpoint pen, and a sign pen, and the writing instrument.
[0002]
[Prior art]
Conventionally, as this type of device, devices as described in Utility Model Publications Nos. 51-15554 and 51-15555 have been proposed. For example, FIG. 13 is a partially cut-away front view showing an example of a knock type mechanical pencil described in Japanese Utility Model Publication No. 51-15555, which is detachably screwed to the tip of the barrel body 41 of the mechanical pencil. A core protection tube 43 is attached to the attached end tube 42 so as to be able to advance and retreat, a protrusion is formed on a part of the outer periphery of the core protection tube 43, and an inner diameter is provided so that the protrusion is loosely fitted in the end tube 42. The inner cylinder 44 is tightly fitted, and an inner protrusion edge 46 for retaining the outer peripheral protrusion 45 of the core protection tube 43 is provided at the upper end portion of the inner cylinder 44. Such apparatus is the so-called jump type, is fitted inside mechanism of the refill, such as from the rear end opening of the barrel body 41 that includes a drop, the lower end of the shaft tube body 41 from the distal end opening of the barrel body 41 The tube 47 is protruded and the female screw portion of the end tube 42 is screwed into the male screw portion formed in the protruding tube 47 of the internal mechanism, and is assembled as a writing instrument.
[0003]
However, these conventional devices can be operated to feed out a rod-like object such as a core only after the internal mechanism is assembled to the shaft body. In other words, the internal mechanism alone could not be operated by a test of temporary operation before assembly. For this reason, in the case where only the internal mechanism is made in advance and then assembled at a different location from the shaft cylinder body, it is extremely inconvenient because the operation test cannot be performed only with the internal mechanism in advance. Further, in such a type of writing instrument, since the structure is not sufficient, the internal mechanism is rattled after being assembled with the shaft cylinder body. Further, when such an internal mechanism is assembled as a pay-out writing instrument, there is a risk that the detent will not be sufficient and a malfunction will occur.
[0004]
[Problems to be solved by the invention]
So this invention can be carried out completely independently operated only in internal mechanism to eliminate the drawbacks of the conventional apparatus, and the incorporation of the barrel body, structurally sufficient, rattle after incorporation It is an object of the present invention to provide a refill device that does not cause the above and a writing instrument thereof.
[0005]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, the center pole are both rotatable and fitting tube that rattling prevention means provided on an outer peripheral, both being fixed by caulking to the fitting cylinder bearing solid and cam cylinder after rotated with respect to the center pole, and the front cam barrel slidable detent respect chromatic vital center shaft relative to the cam barrel and engages and sleeve receives the front Thereafter, by caulking to the center shaft by A sleeve receiver provided, a return spring provided between the sleeve receiver and the front cam cylinder for urging the front cam cylinder rearward, and slidably provided inside the center shaft and the fitting cylinder. and refill 6, a chuck joint is advanced by being pushed through the flange to the tip portion of the refill have a fixed to and flange, and the forward-abutment of the front cam barrel, the flange of the chuck joint A chuck spring provided between the inner flange of the sleeve receiver, a chuck connected to the refill via the chuck joint, a chuck ring loosely fitted to the chuck, an inner flange at the front end, and the above A refill device comprising a sleeve provided in a sleeve receiver for preventing the chuck from retreating, and a base fixed to the sleeve receiver and having a step portion with which the chuck ring abuts on its inner periphery, and A writing instrument is obtained.
[0006]
Further, according to the present invention, the center pole are both rotatable and fitting tube that rattling prevention means provided on an outer peripheral, after which rotates with respect to the center shaft by both bearings being fixed by caulking to the fitting cylinder a cam barrel, a front cam barrel slidable detent respect chromatic vital center pole with respect to the cam barrel and engages and sleeve receives the front Thereafter, a sleeve received which is fixed by caulking to the center shaft, the A return spring that is provided between the sleeve receiver and the front cam cylinder and urges the front cam cylinder rearward, and a rear portion is inserted and fitted into the front cam cylinder so that the inside of the middle shaft and the fitting cylinder A refill device constituted by a refill provided slidably and its writing instrument are obtained.
[0007]
[Action]
In the refill device, which is the internal mechanism of the rear end knock type and / or rotary type writing instrument, knock the knock member provided at the rear end of the refill or rotate the rear fitting cylinder with the front center shaft Then, the refill moves forward against the urging force of the return spring to the rear, and the lead or the like protrudes from the base provided at the tip of the refill device, thereby enabling writing . Na us, Incorporating the refill device to the appropriate barrel, can be used as a rotary and / or knock-type writing instrument.
[0008]
【Example】
1 to 5 show an embodiment of a mechanical pencil refill device according to the present invention. A twin cam mechanism comprising a front cam cylinder 1 and a rear cam cylinder 2 is provided with a bearing 3 on the outer periphery thereof. The middle shaft 4 is attached to the front and the fitting cylinder 5 is attached to the rear by caulking portions 4a and 5a, respectively. A refill 6 as a core tank is inserted into the twin cam mechanism from the rear end of the fitting cylinder 5. Note that an eraser receiving base 9 for receiving an eraser 8 with a jacket 7 is press-fitted at the rear end of the refill 6. A chuck joint 10 is press-fitted and fixed to the tip of the refill 6, and a chuck 11 is attached to the tip of the chuck joint 10. A chuck ring 12 is loosely fitted outside the chuck portion 11a at the tip of the chuck 11.
[0009]
Further, a cam projection 1 a is formed on the front cam cylinder 1, and a return spring 15 is provided between the cam projection 1 a and a rear end of a sleeve receiver 14 provided inside the intermediate shaft 4 for receiving the sleeve 13. Is wound. Further, the chuck joint 10 includes a flange 10a, and a chuck spring 16 is fitted between the flange 10a and a flange portion 14a projecting inward of the sleeve receiver 14. A base 17 is screwed to the front end of the sleeve receiver 14, and excessive writing pressure is absorbed between the sleeve 13 at the rear end of the base 17 and the flange 13 a projecting inward of the sleeve receiver 14. A cushion spring 18 is wound around. Further, a rubber detent member 19 is fitted on the outer periphery of the sleeve receiver 14. In the base 17, a slider 22 having a tip pipe 20 and having an umbrella-shaped packing 21 is slidably provided.
[0010]
Reference numeral 23 is a so-called caulking portion formed around the fitting cylinder 5 by sticking out to prevent rattling, and 24 is formed by caulking in the axial direction at the rear part of the fitting cylinder 5. There are multiple ridges. In FIG. 2, X indicates a fixed portion, and Y indicates a rotating portion when the refill device is set on the shaft cylinder body as shown in FIGS. Further, Zf and Zb are both sliding portions when the refill device is set on the shaft cylinder body as shown in FIGS.
[0011]
The refill device configured as described above is assembled as follows. First, the umbrella-shaped packing 21 is press-fitted from the back of the slider 22, the tip pipe 20 is press-fitted into the front portion of the slider 22, and these slider assemblies are set in the base 17. On the other hand, the chuck joint 10 is press-fitted and fixed to the tip of the refill 6, and then components such as the chuck 11, chuck ring 12, chuck spring 16, sleeve 13, sleeve receiver 14, and cushion spring 18 are attached. Further, the rear cam cylinder 2 and the bearing 3 are set, the middle shaft 4 and the fitting cylinder 5 are attached thereto, and the front cam cylinder 1 and the return spring 15 are inserted inside the middle shaft 4. Further, the center shaft assembly and the core pipe assembly are combined. Then, an eraser receiver 9 is press-fitted into the rear end of the refill 6. Further, the base 17 is screwed into the inside of the tip of the sleeve receiver 14 and the eraser 8 with the jacket 7 is fitted into the eraser receiver 9, and the detent member 19 is fitted to the outside of the sleeve receiver 14 to complete the refill device.
[0012]
FIG. 5 is a perspective view of a twin cam mechanism required when the lead is fed out from the refill in a rotary manner. FIG. 5A is an exploded view of the front cam cylinder 1 and the rear cam cylinder 2. FIG. 5B is a diagram showing a use state. The operation of the mechanical pencil of the above embodiment will be described with reference to FIG. First, when the fitting cylinder 5 is rotated in one direction while holding the middle shaft 4 and fixed, this rotational force is transmitted to the rear cam cylinder 2 integrated therewith. Incidentally, the shapes of the rear cam cylinder 2 and the front cam cylinder 1 are as shown in FIG. 5A, and the front cam cylinder 1 pressed and engaged with the front end of the rear cam cylinder 2 is a sleeve receiver 14. Since the rotation stopper 1b is applied to the rotation stopper 14c (FIG. 1), it is pushed by the rear cam cylinder 2 so that it can be moved forward against the return spring 15. As the front cam cylinder 1 advances, the front cam cylinder 1 comes into contact with the flange 10 a of the chuck joint 10, whereby the chuck 11 is advanced through the chuck joint 10, the chuck ring 12 is released, and the slider 22 and the core are aligned. Will be sent out and written.
[0013]
In addition, in order to retract and store the core and the tip pipe 20, an operation reverse to the above may be performed. That is, when the fitting cylinder 5 is rotated in the other direction, the front cam cylinder 1 is moved backward by the urging force of the return spring 15 following the front end of the rear cam cylinder 2 rotating integrally therewith. Accordingly, the forward and backward movement of the front cam cylinder 1 due to the rotation of the rear cam cylinder 2 causes the refill device to perform the associated operation to feed out the lead and to retract the lead. That is, in the process of rotating the fitting cylinder 5, the chuck ring 12 comes into contact with the base 17 and comes off the chuck 11, so that the chuck 11 is released. Accordingly, in this state, the fingertip or the like is pressed against the lead and the tip of the tip pipe 20 and pushed in, so that storage is possible.
[0014]
FIG. 6 (A) shows a rotary type mechanical pencil in which the refill device of FIG. 1 is incorporated in the main body of the shaft. The refill device has a front shaft 25 made of plastic and a bush 26 in the rear portion of the front shaft 25. Is fitted. On the other hand, the shaft 29 is crimped together fitted after erected seen assembled by mounting member 27 and the point bis 28 on the fitting tube 5 of the refill device rear. Furthermore, a clip 30 is attached to the attachment member 27 with a point screw 28, and a cap 31 is attached to the tip of the point screw 28. A base 17 having an external thread 17a of the refill device protrudes from the front end opening of the front shaft 25, and a tip 32 is screwed between the outer periphery of the base 17 and the inner periphery of the front end of the front shaft 25. The refill device is fixed.
[0015]
6B is an enlarged cross-sectional view of the tip of the mechanical pencil in FIG. 6A, and FIG. 6C is a cross-sectional view taken along the line CC in FIG. 6A. More specifically with reference to these drawings, a plurality of detent ribs 25a are formed on the inner peripheral portion of the front end portion of the front shaft 25 as shown in FIG. 6B. ), The ribs 25a engage with recesses 14b formed on the outer periphery of the tip of the sleeve receiver 14 so that the refill device is prevented from rotating with respect to the front shaft 25. In addition, a detent member 19 fitted around the sleeve receiver 14 of the refill device is brought into pressure contact with the inner periphery of the front shaft 25 to provide a detent function. Further, as described above, the annular ridge 23 formed by so-called caulking formed on the fitting cylinder 5 at the rear portion of the refill device plays a role of preventing backlash with the front shaft 25 and the rear shaft 29, respectively. In order to assemble the refill device, the refill device is inserted into the front shaft 25 and protruded from the front end of the front shaft 25, and the tip 32 is screwed into the base 17 of the refill device. Thereafter, the rear shaft 29 is fitted to the rear portion of the refill device to complete.
[0016]
7 (A) and 7 (B) show a knock type mechanical pencil in which the refill device of FIG. 1 is incorporated in the main body of the shaft. This refill device is set in one long shaft 33 made of metal. ing. In this case, since the long shaft 33 is made of metal, it is difficult to attach a rib inside the shaft as in the above embodiment. However, in this case as well, it is only necessary to prevent rotation by fitting the anti-rotation member 19 and the inner diameter of the long shaft 33. The refill device can be assembled by inserting the refill device into the long shaft 33 and screwing the tip 32 onto the base 17 of the refill device.
[0017]
FIG. 8 shows a rotary and knock type mechanical pencil in which the refill device of FIG. 1 is incorporated in the main body of the shaft, and the rear end of the refill device is rear shaft as shown in the figure as compared with the rotary type of FIG. The clip 30 is projected from 29 to form a knock portion, and the clip 30 is formed integrally with the outside of the rear shaft 29. The assembly procedure is the same as that of the rotary type in FIG.
[0018]
FIG. 9 shows an embodiment of a refilling device for a rotary ballpoint pen according to the present invention. The twin cam mechanism comprising a front cam cylinder 1 and a rear cam cylinder 2 has a bearing 3 on its outer periphery. A fitting cylinder 5 is attached to the middle shaft 4 and the rear side by caulking portions 4a and 5a, respectively. A refill 35 filled with ball-point pen ink is inserted into the twin cam mechanism from the rear end of the fitting cylinder 5. Further, FIG. 10 is a view showing a rotary-type feeding ballpoint pen by incorporating the refill device of FIG. 9 into a shaft cylinder.
[0019]
FIG. 11 shows an embodiment of a refill device for a knock type ballpoint pen, in which a fitting cylinder 5 is integrally fitted to the rear part of the center shaft 4 by caulking. A refill 35 is inserted from the rear end opening of the fitting cylinder 5, and a return spring 15 is provided between the base 17 screwed to the tip of the central shaft 4 and a pair of locking projections 35 a of the refill 35. It is wound and urges the refill 35 backward. A rotating cam 36 is attached to the rear end of the refill 35, a knock cam 37 is engaged with the upper portion of the rotating cam 36, and a knock member 38 is engaged with the upper portion of the knock cam 37. It has been. Furthermore, FIG. 12 is a view showing a knock type ballpoint pen by incorporating the refill device of FIG. 9 into a shaft cylinder.
[0020]
The refill device configured in this manner can be subjected to an operation test before being incorporated into the shaft cylinder body. That is, when the knock member 38 is knocked, the force is transmitted to the refill 35 via the knock cam 37 and the rotating cam 36. Then, the refill 35 is moved forward against the return spring 15 and protruded from the tip of the base 17 to be in a writing state. When the writing is completed, if the knock member 38 is knocked again, the refill 35 is moved backward by the return spring 15 and retracted. This refill device can be used as a knock-type ballpoint pen by being easily incorporated in the shaft cylinder body.
[0021]
【The invention's effect】
Since the refill device and the writing instrument of the present invention are configured as described above, they can be completely operated independently with only the refill device as an internal mechanism, and are built into the shaft cylinder body. Therefore, there is an effect that the internal mechanism does not rattle and unnecessary rotation occurs after installation.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a mechanical pencil refill device according to an embodiment of the present invention.
FIG. 2 is a front view of a mechanical pencil refill device according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of the fitting cylinder taken along line AA in FIG. 2;
4 is a cross-sectional view of the sleeve receiver taken along the line BB in FIG. 2. FIG.
FIG. 5 is a perspective view in which a part of the operation of the twin cam mechanism of FIG. 1 is omitted.
6 is a cross-sectional view of a rotary mechanical pencil in which the refill device of FIG. 2 is incorporated in a shaft cylinder.
7 is a cross-sectional view of a knock type mechanical pencil in which the refill device of FIG. 2 is incorporated in a shaft cylinder.
8 is a cross-sectional view of a rotary and knock type mechanical pencil in which the refill device of FIG. 2 is incorporated in a shaft cylinder.
FIG. 9 is a cross-sectional view of a refill device for a rotary ballpoint pen according to an embodiment of the present invention.
10 is a cross-sectional view of a rotary ballpoint pen in which the refill device of FIG. 9 is incorporated in a shaft body.
FIG. 11 is a sectional view of a refill device for a knock ballpoint pen according to an embodiment of the present invention.
12 is a cross-sectional view of a knock-type ballpoint pen in which the refill device of FIG. 11 is incorporated into a shaft cylinder body.
FIG. 13 is a partial sectional view showing a conventional apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front cam cylinder 2 Rear cam cylinder 4 Middle shaft 5 Fitting cylinder 6 Refill 13 Sleeve 14 Sleeve receiver 15 Return spring 17 Cap

Claims (6)

A fitting tube 5 rattling prevention means 23 is provided on both rotatable and the outer periphery and the center shaft 4, by both bearings 3 is fixed by caulking to the fitting cylinder and the cam barrel 2 after rotate relative axial rod a front cam barrel 1 slidable with respect to chromatic vital center shaft detent 1b with respect to the cam barrel and engages and sleeve receives the front Thereafter, the sleeve receiving 14 which is fixed by caulking to the center shaft A return spring 15 provided between the sleeve receiver and the front cam cylinder for urging the front cam cylinder backward; a refill 6 slidably provided inside the center shaft and the fitting cylinder; have a fixed to and flange 10a on the front portion of the refill, and the chuck joint 10 is advanced by being pushed through the flange by forward and abutment of the front cam barrel, flange and three of the chuck joint A chuck spring 16 provided between the inner flange 14a of the receiver, a chuck 11 connected to the refill through the chuck joint, a chuck ring 12 loosely fitted on the chuck, and an inner flange at the front end. And a sleeve 13 provided in the sleeve receiver for preventing the chuck from retreating, and a base 17 fixed to the sleeve receiver and having a step portion with which the chuck ring abuts on the inner periphery thereof. The refill apparatus characterized by becoming. A fitting tube 5 rattling prevention means 23 is provided on both rotatable and the outer periphery and the center shaft 4, by both bearings 3 is fixed by caulking to the fitting cylinder and the cam barrel 2 after rotate relative axial rod a front cam barrel 1 slidable with respect to chromatic and and the center shaft of the rotation stopper 1b with respect to the cam barrel and engages and sleeve receives the front Thereafter, the sleeve receiving 14 which is fixed by caulking to the center shaft A return spring 15 provided between the sleeve receiver and the front cam cylinder and urging the front cam cylinder rearward; and a rear portion inserted and fitted into the front cam cylinder; And a refill device 35 slidably provided in the interior of the refill device.   The refill device according to claim 1 or 2, wherein the backlash preventing means is a plurality of protrusions formed on the outer periphery of the fitting cylinder by caulking.   The refill device according to claim 1, wherein knock means is provided at a rear end of the refill.   The refill device according to claim 1, wherein a rotation prevention member or a rotation prevention portion is provided on an outer periphery of the sleeve receiver in front of the middle shaft. A writing instrument comprising the refill device according to claim 1 or 2 as a writing instrument internal mechanism incorporated in a shaft tube .

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