JPS6319181Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a knock-type sharp pencil in which a refill case containing a spare lead is removably housed within the shaft.

Conventional Notsu-type sharp pencils have the disadvantage that you have to take out the appropriate number of leads from the refill case and store them in the lead tank, which is very cumbersome to do and also leaves your hands dirty when holding the leads. had. This led to the idea of a removable refill case for a refill type sharp pencil, but all conventional pencils had a chuck attached to the front of the refill by press-fitting it into a tank or connector. Therefore, when attaching the refill case, the chuck moves forward, causing the refill to be unnecessarily drawn out, and making it very difficult to confirm that the refill case is securely attached.

This idea allows the fixing device, which is pushed axially backward by a return spring, to be directly locked to the shaft, and also by inserting the main body into the middle pipe.
Eliminates all of the above-mentioned drawbacks of conventional products,
Another object of the present invention is to provide a lock-type sharp pencil in which the chuck and main body are not bent, thereby preventing the lead from being damaged.

The structure of this invention will be explained based on the drawings. As shown in FIG. Connect to. A knob 4 is fitted onto the rear outer side of the fixture 2 so as to cover the eraser 3. A spare lead 5 is stored in the main body 1, and a lid 6 is fitted to the front of the main body 1 to form a refill case. On the other hand, as shown in FIG. 2, in the knock-type sharp pencil, a chuck 8 with a tightening ring 7 fitted thereon is fixed to the front part of a middle pipe 9, and the middle pipe 9 can be slid longitudinally within a shaft 10. It is built in and configured. Deeply insert the front part of the main body 1 of the refill case with the lid 6 removed into the inner pipe 9, and insert the elastic piece 2 of the fixture 2 into the opening window 10A of the shaft 10.
The protrusion 2C provided on the elastic piece 2B of the fixation tool 2 is moved by the elastic force of the return spring 11 provided between the inner stage 10B of the shaft 10 and the fixture 2. Part 2C is the opening window 1 of the shaft 10
It is configured to be locked to a locking stage 10C of 0A.

When the knob 4 of the lock-type mechanical pencil constructed as shown in FIG. The core 5 is fed out. At this time, since the main body 1 is guided by the middle pipe 9, the middle pipe 9 and the main body 1 will not bend, and there is no risk of breaking the core 5. In addition, since the main body 1 and the fixture 2 are configured to be swingable, the middle pipe 9
And the main body 1 can slide smoothly against each other without resistance. On the other hand, to replace the refill case, the shaft 10
The refill case can be removed by pressing the protrusion 2C of the fixture 2 inward through the opening window 10A to disengage the locking stage 10C of the shaft 10 and the protrusion 2C of the fixture 2.

FIG. 3 shows another embodiment of this invention, in which a middle pipe 1 with a chuck 108 fixed to the front part is shown.
The weight body 12 is loosely fitted to the outside of the body 1 and the fixture 2 is attached in the same manner as in the embodiment shown in FIG.

FIG. 4 shows another embodiment of this invention, in which a groove 110D is formed in the rear part of the shaft 110, and a protrusion 1 is formed in the elastic piece 102B of the ring 102.
Configure 02C. Concave groove 110D of this shaft 110
Loosely fit the protrusion 102C of the fixture 102 into the groove 1.
The protrusion 102C is locked to the locking stage 110C of the groove 110D by the return spring 111 stretched between the inner stage of the front part of the fixture 10D and the front end of the fixture 102. An eraser receiver 13, which is swingably connected to the main body 101 of the refill case, is removably fitted into the fixture 102. The connection between the fixture and the eraser holder is as shown in FIG.
There is no problem even if the two are screwed together in a detachable manner.

Furthermore, in all of the embodiments described above, the fixture or the eraser holder and the main body are connected in a swingable manner, but if the inner pipe and the main body can slide, the main body and the fixture or the eraser holder are integrated. There is no problem in doing so.

As explained above, this invention allows the fixture of the refill case, which is pushed axially backward by the return spring, to be directly locked to the shaft, and the main body, which is integrally or removably connected to the fixture, is attached to the middle pipe. The feature is that it is inserted inside.

As a result, the refill case containing the spare lead can be installed directly into the shaft, and there is no need to unnecessarily draw out the lead when installing the refill case.Furthermore, since the main body is guided by the middle pipe, the middle pipe and main body are This has the advantage that there is no risk of bending and breaking the core.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view showing the refill case of this invention, Figure 2 is a vertical sectional view showing the refill case installed in a lock-type mechanical pencil, and Figures 3 and 4 are respectively of this invention. FIG. 5 is a longitudinal sectional view of main parts showing another embodiment of this invention. 1.101...Main body, 1A...Protrusion of main body 1,
1B...Front end of main body 1, 2, 102, 202...
Fixing tool, 2A...Concave groove of fixing tool 2, 2B・102
B...Elastic piece of fixture 2/102, 2C/102
C... Protrusion of fixture 2/102, 3... Eraser, 4... Knob, 5... Lead, 6... Lid, 7... Tightening ring, 8/108... Chick, 9/109...
...Medium pipe, 9A...Inner stage of medium pipe 9, 10.
110... shaft, 10A... opening window of shaft 10, 10
B...Inner stage of shaft 10, 10C/110C...shaft 1
0.110 locking step, 10D... concave groove of shaft 10,
11・111...Return spring, 12...
Heavy body, 13/113... Eraser holder.

Claims (1)

[Scope of utility model registration request] A main body of a refill case for storing a spare lead in a lock type sharp pencil which has a chuck and a tightening ring that is fitted onto the chuck and opens and closes the chuck, and the lead is drawn out by moving the chuck forward and backward. A fixing device is provided integrally or removably connected to the fixing device, a protrusion is formed on the elastic piece of the fixing device, and the front part of the main body is inserted into the middle pipe with the chuck fixed to the front part, and the shaft is locked. A lock-type sharp pencil in which the protrusion of the fixture is locked to the stage, and a return spring is stretched between the inner stage of the shaft and the fixture.