JPS6334951Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a double-ended composite writing instrument in which an accessory writing instrument is attached to the rear of a knock-type sharp pencil.

Conventionally, double-headed composite writing instruments have an attached writing instrument attached to the rear end of the lead tank, which is a part of the mechanical part of the Notsu-type sharp pencil, but the length of the attached writing instrument protruding from the rear end of the barrel, that is, the writing tip, has a design. It cannot be made to protrude too long from the viewpoint of safety or functional ease of use, so the rear end of the core tank is cut off at a point that is an arbitrary distance deeper than the rear end of the shaft cylinder. The outer flange is configured to press-fit and lock the attached writing instrument to the rear end of this lead tank, but if a gap is made between the outer surface of the outer flange and the inner surface of the barrel, when writing with the attached writing instrument, This created a problem in which sideways wobbling occurred, making it difficult to write, causing great discomfort to the scribe.

This design is configured so that the attached writing instrument is pressed into contact with the inner surface of the barrel barrel, so that when using a knock-type sharp pencil, the lead tank and attached writing instrument slide smoothly, and the attached writing instrument is When the writing instrument is used, the attached writing instrument is engaged with the inner surface of the barrel, so that no lateral vibration occurs.

The included writing instruments include a ballpoint pen, felt-tip pen,
Although there are various writing instruments such as markers, the embodiment of this invention uses a ballpoint pen and will be explained based on the drawings. As shown in Figures 1 and 2,
The mechanical part of the knock-type sharp pencil consisting of a chuck, a tightening ring, a coupling device, a chuck spring, and a lead tank is attached to the barrel 1, and a base 3 with a lead holder 2 is attached to the barrel 1 via a connector 4. It's in close contact. The shape of the cap 3 consists of a cylindrical portion consisting of a fitting portion 3A and a conical mouth portion 3B, and the core 5 is configured to protrude from the pointed end of the conical mouth portion 3B. On the other hand, inside the rear part of the barrel 1, a lead tank 6, which is a mechanical part of the knock-type mechanical pencil, is extended, and is cut off at a predetermined distance from the rear end of the barrel 1. The rear shaft portion 7A of the ballpoint pen body 7, which is configured to have an appropriate pressing force, is press-fitted inside the rear end of the lead tank 6. The engaging tool 7B configured in the middle part of the ballpoint pen body 7 is configured to have a diameter slightly larger than the inner diameter of the barrel 1, and is configured to be divided into several parts with cutouts at the front and rear to have elasticity. Therefore, the engaging tool 7B is pressed into engagement with the inner surface 1A of the shaft cylinder 1 with a force weaker than the elastic force of the chuck spring 8. Behind the engagement tool 7B of the ballpoint pen body 7 is a writing shaft consisting of a fitting portion 7C and a conical mouth portion 7D. A ballpoint pen 9 consisting of a tip 9A and a refill portion 9B storing ink is inserted and fixed into the conical mouth portion 7D of the writing shaft of the ballpoint pen body 7 constructed as described above. A knob cover 10 is normally fitted to the writing shaft of the ballpoint pen body 7. The upper end 10A of the knob cover 10 is configured to be flat, and its fitting force is weaker than the fitting force between the rear shaft portion of the ballpoint pen body 7 and the lead tank 6.

When using such a double-headed compound writing instrument, when writing with the lead 5, the lead 5 can be gradually drawn out by repeatedly knocking the knob cover 10, as with a normal knock-type sharp pencil, and then the ballpoint pen 9 is used. If you wish to do so, pull out the knob cover 10 and fit it into the fitting part 3A of the base 3 of the knob type sharpening pencil, and then remove the barrel 1.
By reversing the , it becomes possible to quickly write with the ballpoint pen 9. Moreover, at this time, since the engagement tool 7B of the ballpoint pen body 7 is press-fitted to the inner surface 1A of the barrel barrel 1, the ballpoint pen body 7 is inside the barrel barrel 1. There is no sideways movement.

FIG. 3 shows another embodiment of this invention, in which a groove 107E is formed in the middle part of the ballpoint pen body 107.
is provided, and an engagement tool 11 made of an O-ring is fitted externally into the groove 107E, and the engagement tool 11 is connected to the shaft cylinder 1.
It is configured to be pressed into engagement with the inner surface 101A of 01 with a force weaker than the elastic force of the chuck spring.

In FIG. 4, the engagement tool 111 is constructed with a ring having a C-shaped cross section instead of an O-ring.

FIG. 5 shows another embodiment of this invention, in which a plurality of recesses 207F are provided in the middle part of the ballpoint pen body 207, and an engaging tool 211 is provided in the recesses 207F.
A ball is rotatably attached to the engagement tool 2.
11 is configured to be pressed into engagement with the inner surface 201A of the shaft cylinder 201 with a force weaker than that of the chuck spring.

As explained above, the feature of this invention is that the engagement tool provided on the attached writing instrument is pressed into engagement with the inner surface of the barrel.

As a result, there is no problem in sliding the lead tank in order to feed out the lead, and when writing with the attached writing instrument, there is no lateral wobbling of the attached writing instrument, making it possible to write comfortably. .

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing a double-ended composite writing instrument of this invention, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Figs. 3, 4, and 5 are other drawings of this invention. FIG. 1,101,201...Shaft cylinder, 1A,101
A, 201A...Inner surface of shaft cylinder 1, 101, 201, 2... Core holder, 3... Cap, 3A... Fitting part of cap 3, 3B... Mouth part of cap 3, 4...
Connector, 5... Core, 6... Core tank, 7, 10
7,207...ballpoint pen body, 7A...rear shaft portion of ballpoint pen body 7, 7B...engaging tool of ballpoint pen body 7, 7C...fitting portion of ballpoint pen body 7, 7D...
Mouth part of ballpoint pen body 7, 107E... Concave groove of ballpoint pen body 107, 207F... Ballpoint pen body 2
07 recess, 8...chuck spring, 9...
Ballpoint pen, 9A... tip of ballpoint pen 9, 9B... refill portion of ballpoint pen 9, 10
...Knot cover, 10A...Knot cover 10
Upper end of 11, 111, 211... engaging tool.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a double-ended composite writing instrument in which a knock-type sharp pencil protrudes from one end of the barrel and an attached writing instrument protrudes from the other end, a lead that is a part of the mechanism of the knock-type sharp pencil A double-ended composite writing instrument characterized in that an attached writing instrument is attached to the rear end of the tank, and an engagement tool provided on the attached writing instrument is press-fitted and engaged with the inner surface of the shaft tube. 2. The middle part of the attached writing instrument is made elastic by dividing it into several parts with cutouts at the front and back, and the middle part is press-fitted into the inner surface of the barrel, thereby providing an engaging tool in the attached writing instrument. A double-headed composite writing instrument according to claim 1 of the claimed utility model registration. 3. Registration of a utility model characterized in that the attached writing instrument is provided with an engaging tool by providing a concave groove in the middle part and fitting an O-ring that presses and engages with the inner surface of the shaft cylinder into the groove. A double-ended composite writing instrument according to claim 1. 4. Practical use characterized in that the attached writing instrument is provided with an engaging tool by providing a concave groove in the middle part, and fitting a C-shaped cross-section ring that presses and engages with the inner surface of the barrel cylinder into the concave groove. A double-ended composite writing instrument as set forth in claim 1 of the patent registration claim. 5. A groove is provided in the intermediate part of the writing instrument, and a plurality of balls press-fitted to the inner surface of the barrel are rotatably attached to the groove, and an engaging tool is provided on the writing instrument. A double-ended composite writing instrument according to claim 1 of the utility model registration claim.