JPH025996Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a double-headed sharp pencil having a lock type sharp pencil function at both ends of the barrel.

A double-headed sharp pencil with a lock-type sharp pencil function on both ends of the barrel can hold 2 in one.
It has great utility in that it allows the use of cores of different colors and core diameters. To obtain such a sharpening pencil, you can simply connect two notch-type sharpening pencils and attach a knob in the middle that can press both notches, but with this configuration, the entire length The problem is that the amount is twice as large as that of a regular mechanical pencil. Therefore, in order to solve this problem, it would be better to make both lead storage tubes semicircular in cross section and combine these lead storage tubes in the barrel, but in any case, two notch-type sharp pencils It is not possible to avoid the problem that the configuration becomes complicated because all the components are housed in one shaft cylinder.

The present invention was developed in view of the various problems with double-headed sharp pencils mentioned above.The inside of the barrel is divided into two by a partition plate connected to a pressure knob placed on the outer surface of the barrel, and this partition plate is used to connect both pencils. By making it possible to advance selectively, the object is to provide a double-headed sharp pencil whose overall length is not much different from that of a normal knock-type sharp pencil and whose structure is simple.

The present invention will be described in detail below based on embodiments shown in the accompanying drawings.

In FIG. 1, reference numeral 1 is a shaft cylinder, and cylinder bodies 2 and 2' are detachably attached to both ends of the shaft cylinder 1 by screwing or the like. Relay members 3, 3' are fixed to the cylinders 2, 2' by screwing, press-fitting, etc., and chuck rings 4, 4' are loosely fitted into the relay members 3, 3' so as to be movable a certain distance. There is. Incidentally, the relay members 3, 3' may be integral with the cylinders 2, 2'. The chucks 5, 5', which are split into two or three parts, which are fitted inside the chuck rings 4, 4', have a pressing part 7, which is provided with a tapered core guide surface 6, 6'.
7' by screwing, press-fitting, etc., and is attached inward by elastic members 8, 8' such as springs stretched between the relay members 3, 3' and the pressing parts 7, 7'. Forced. Numerals 9 and 9' are tip bodies that are detachably attached to the cylinder bodies 2 and 2' by screwing, etc., and these tip bodies 9 and 9' impart a slight elasticity to the core tubes 10 and 10' as well as the core. Core detents 11, 11' to be provided
is provided. 12 is slidably arranged inside the shaft cylinder 1, and divides the inside of the shaft cylinder 1 into two to form the core storage section 1.
3, 13' is a partition plate made of metal, resin, etc., and has bent portions 14, 14' at both ends. These bent parts 14, 14' are designed to prevent the other lead from entering the chuck on the side from which the lead is fed out when the lead is stored in the two-part lead storage parts 13, 13'. It's not necessarily necessary. Almost in the center of this partition plate 12, there is a second
As shown in FIGS. 3 and 3, a support member 17 having a leg portion 16 located in a longitudinal hole 15 provided in the shaft tube 1 is fixed. The supporting member 17 may be fixed in various forms other than those shown in the drawings. A pressing rib 18 arranged on the outer surface of the shaft cylinder 1 is fixed to the leg portion 16.
8 may be ring-shaped, as shown in FIG. 4, in addition to those shown in FIGS. 2 and 3.

Next, the action will be explained.

If you want the core to protrude from the left core tube 10 in the state shown in FIG. 1, slide the pressing rib 18 to the left, and the partition plate 12 connected to this pressing rib 18 will move to the left. Then, the bent portion 14 comes into contact with the pressing portion 7, and then the chuck 5 is pressed through the pressing member 14.
is pressed and moved forward, causing a core of a certain length to protrude from the core tube 10. In this state, the right chuck 5' maintains its normal position without being subjected to any action.

Moreover, if it is desired to make the core protrude from the right core tube 10', the pressing rib 18 may be slid to the right.

In addition, the bent part 1 of the partition plate 12 when feeding out the core
4, 14' and the pressing parts 7, 7', as shown in FIG.
4' may be made the same as the inclination of the core guide surfaces 6, 6' of the pressing parts 7, 7', or as shown in FIG.
Flat portions 7a, 7 are provided on a part of the core guide surfaces 6, 6' of 7'.
By providing a', the shape of the bent parts 14, 14' of the partition plate 12 and the shape of the core guide surfaces 6, 6' of the pressing parts 7, 7' may be made the same. .

As described above, in the present invention, the interior of the barrel is divided into two by a partition plate connected to a pressure knob disposed on the outer surface of the barrel, and the chucks of both can be selectively advanced by this partition plate. Thus, it is possible to obtain a double-headed mechanical pencil whose overall length is not much different from that of a normal lock-type mechanical pencil and whose structure is simple.

Furthermore, as shown in FIG.
When 2' is made detachable, replenishment and replacement of cores can be carried out simply by removing the cylinders 2 and 2' from the shaft cylinder 1.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view, FIG. 2 is a perspective view of the main part, FIG. 3 is a sectional view taken along line A-A of FIG. A cross-sectional view showing an example, and FIGS. 5 and 6 are longitudinal cross-sectional views of main parts showing modified examples. 1... Shaft cylinder, 2, 2'... Cylindrical body, 4, 4'... Chuck ring, 5, 5'... Chuck, 7, 7'... Pressing part,
8, 8'... Elastic member, 9, 9'... Tip body, 10, 1
0'... Core tube, 11, 11'... Core detent, 12... Partition plate, 13, 13'... Core storage section, 18... Pressing rib.

Claims (1)

[Scope of utility model registration request] The pressing part that connects the chuck ring to the chuck that fits on the outside is biased inward by an elastic member, and the cylinder body, which has a core tube and a tip with a core detent, is attached and detached from both ends of the shaft cylinder. A partition plate connected to a pressing rib disposed on the outer surface of the cylinder is slidably disposed inside the cylinder, dividing the inside of the cylinder into two to form a core storage area, and the partition plate connects the pressing part to the cylinder. A double-headed sharp pencil that allows both chucks to be selectively moved through the .