JPS5925680Y2 - Type 2 writing instrument - Google Patents

Description

[Detailed description of the invention] This invention is equipped with a mechanical pencil and a ballpoint pen on the top and bottom of one barrel.The ballpoint pen is hidden inside the barrel when not in use, and is easily exposed when in use. It concerns heavy writing instruments.

The purpose of the present invention is to provide two types of writing instruments in which double writing instruments are arranged in a straight line and the barrel does not become thick.

Another purpose is for a kind of writing instrument to be hidden inside the barrel when not in use.
The objective is to obtain a writing instrument with a structure that easily protrudes during use.

The present invention to satisfy the above object is constructed as follows.

That is, the present invention is a writing instrument in which a mechanical pencil and a ballpoint pen are provided above and below the barrel 1, and the chuck 4 of the pencil lead extrusion holder 3 installed in the conical tip member 2 fixed to the barrel 1. The operating tube 5, which also serves as a lead case for pressing the chuck 4 and is inserted into the shaft tube 1, has a cylindrical shape in the intermediate position and a conical bottom surface 11 on the mechanical pencil side.
A small passage hole 12 for a pencil lead 15 is formed in the center of the partition tube 7, which has a cylindrical end surface 17 at the rear end on the ballpoint pen side. A short and thin ballpoint pen core 8 which is partitioned and whose pen point faces in the opposite direction to the mechanical pencil, and a tubular weight 9 that is loosely inserted around the ballpoint pen core 8 are housed in the ballpoint pen side of the operating tube 5, and the ballpoint pen A hole 16 is provided in the knock lid 14 which is removably inserted into the side, and a hole 16 is provided in which the neck 8' of the ballpoint pen core 8 is engaged to enable the ballpoint pen to be used. Reception step part 10
This is a type 2 writing instrument made by.

In the figure, reference numeral 6 indicates a spring acting on the operating tube 5, and reference numeral 13 indicates a conical portion formed on the tubular weight 9.

Since the present invention has the structure explained above, by inserting and fixing a short partition tube into the operating tube, it is divided into mechanical pencil side and ballpoint pen side, and since these are lined up in a straight line, it is possible to use a thin shaft tube. can be used as a mechanical pencil without any problems.

At this time, the ballpoint pen core is hidden inside the barrel, and there is no risk of contaminating clothing or the like with the tip of the pen.

To replenish pencil lead, pull out the knock lid, turn the sharp pencil upwards, remove the ballpoint pen lead, and insert the pencil lead through the operation tube on the ballpoint pen side, allowing it to pass through the ballpoint pen side and put it into the lead case.

At this time, the conical bottom surface of the short partition tube ensures that the core falls through the small passage hole to the core case side.

Next, when using a ballpoint pen, by reversing the barrel, the neck 8' of the ballpoint pen core will protrude until it is caught in the hole 16 of the knock lid, and due to the action of the tubular weight, the ballpoint pen core will be shifted in the operation tube, and the rear end As shown in Figure 3 (=), it hits the cylindrical end surface 17 of the short partition tube and stops, allowing free writing.

At this time, the tubular weight is stopped by a receiving step 10 at the rear end of the operating tube, and can be prevented from flying out.

Furthermore, since the knock lid is removably attached to the operating tube, once removed, the ballpoint pen core can be immediately removed and replaced with a new one.

In addition, when this ballpoint pen is in use, the pencil lead inside the lead case gathers around the conical bottom of the short partition tube and does not enter the small passage hole, preventing the pencil lead from accidentally entering the space on the ballpoint pen side or breaking. do not have.

[Brief explanation of the drawing]

The drawings show an embodiment of the second class writing instrument according to the present invention, in which Fig. 1 is a longitudinal sectional front view, Fig. 2 is an enlarged view of the main parts of the same,
FIG. 3 is a sectional view showing the state in which the ballpoint pen is used. DESCRIPTION OF SYMBOLS 1... Shaft cylinder, 2... Tip member, 3... Holder, 4
...Chuck, 5...Operation tube, 6...Spring, 7.
... Partition short tube, 8 ... Ballpoint pen core, 9 ... Tubular weight, 10 ... Receiving collar, 11 ... Conical bottom, 12 ...
... Small passage hole, 14 ... Knock lid, 15 ... Pencil lead, 16 ... Hole, 17 ... Partition short tube cylindrical end surface.

Claims (1)

[Scope of utility model registration request] In a writing instrument in which a mechanical pencil and a ballpoint pen are provided above and below in a barrel 1, a chuck 4 of a pencil lead extrusion holder 3 is installed in a conical tip member 2 fixed to the barrel 1.
Continuing to this, there is a cylindrical biconical bottom surface 11 on the mechanical pencil side, and a pencil lead 15 in the center thereof, which also serves as a lead case for pressing the chuck 4 and is located approximately in the middle of the operating tube 5 inserted into the shaft tube 1. A short partition tube 7 having a small passage hole 12 and a cylindrical end surface 17 at the rear end on the ballpoint pen side is fixed to divide the operating tube 5 into a pencil lead case side and a ballpoint pen side, and the pen tip is sharp. A short and thin ballpoint pen core 8 facing in the opposite direction to the pencil and a tubular weight 9 that is loosely inserted around the ballpoint pen core 8 are housed in the ballpoint pen side of the operation tube 5,
A hole 16 is provided in the knock lid 14 which is removably inserted into the ballpoint pen side, and a hole 16 is provided in which the neck 8' of the ballpoint pen core 8 is engaged to enable the ballpoint pen to be used. A type 2 writing instrument formed of a receiving stepped portion 10 of No.9.