JP2509549Y2 - Telescopic ballpoint pen - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION This invention relates to an improvement of a telescopic ball-point pen.

[0002]

2. Description of the Related Art A conventional telescopic ball pen is disclosed in Japanese Patent Publication No. 2-5.
Like the invention of No. 7040, the ball pen reich is in the form of a thin straight cylinder.
Of the ball pen refill is inserted into the core tube inside the tip spindle body so that it can be inserted and removed freely, and a sliding tip is provided between the caps that can protrude to a position where the tip of the ballpoint pen refill is hidden. It is intended that the sliding tip is pushed to the concealed position of the core tip by pressing the push rod by expanding and contracting the rear shaft portion.

[0003]

Disadvantages of the prior art However, in the case of this telescopic ball pen, it is preferable that the ball pen reach is thin and has a round cylindrical shape, but the tank pen is thicker. In the case of the so-called parker core, it is necessary to thicken the front shaft main body itself and the core cylinder, and there is a drawback that not only the whole body becomes too thick and heavy, but also writing becomes difficult.

[0004]

The present invention is intended to solve the above-mentioned drawbacks of the conventional telescopic ball-point pen.
Thick ball pen ink tank for ink tank (commonly called as a parker)
It is an object of the present invention to provide a retractable ball-point pen using a core, which is easy to write without changing the overall thickness.

[0005]

The present invention will be described in detail with reference to the embodiment shown in the drawings. It comprises a front shaft portion 1 and a rear shaft portion 2 slidably fitted to the front shaft portion 1, and the front shaft portion 1 Is a sliding body that is slidably inserted between a cylindrical front shaft body 3, a base 4 screwed to the tip of the front shaft main body 3, and the base 4 and a rear flange portion 6 through a spring 7. The moving tip 5 and the core tube 9 fixed to the front crown 13 through the fixing rod 8 at the rear part of the front shaft main body 3 and the core tube 9 whose tip is open and can be brought into contact with the sliding tip 5 freely. A front barrel crown 13 having a pressing cylinder 10 which covers the other end and is rotatably inserted into the fixed rod 8 and a fitting concave portion 12 which projects rearward and internally has a fastening portion 11 such as a permanent magnet, and the tip. The push rod 14 has an insertion hole 14 ′ formed so as to pass through the front and rear surfaces of the shaft crown 13 so as to be movable back and forth, and the tip of the push rod 14 can press the pressing cylinder 10 freely.

In the joint portion 15 between the front shaft portion 1 and the rear shaft portion 2, non-magnetic stopper pieces 16, 16 are brought into contact with the rear portion of the front shaft main body 3 and project on the inner surface of the stopper pieces 16, 16. The protrusions 17, 17 provided are fitted in the holes 18 penetrating the front shaft main body 3 and the front shaft crown 13 so as to fix the front shaft crown 13 and strike the core ring 22 described later. This is to prevent it from coming off.

The core cylinder 9 is fixed to a fixed rod 8, and the fixed rod 8 is inserted into a pressing cylinder 10 and fixed to the front crown crow 13. This core cylinder 9 is commonly referred to as a parker core. The thick ballpoint pen refill 19 of the ink tank can be inserted tightly.

The top surface of the fastening portion (permanent magnet) 11 is prevented from protruding from the fitting recess 12 and a gap 21 is provided between the fitting recess 12 and a rear shaft body 20 which will be described later.

The rear shaft portion 2 is fixed to the rear shaft main body 20, a core ring 22 fixed to the front end of the rear shaft main body 20, and the rear end of the rear shaft main body 20 to the permanent magnet (fixing portion) 11. It is composed of a rear shaft crown 24 in which a magnetic body (fastening body) 23 such as iron to be magnetically attached is provided. When the rear shaft body 20 is pushed into the front shaft body 3, the permanent magnet 11 causes the magnetic body 23 to move. At the same time as magnetically adhering to the spring 7, the rear end of the push rod 14 hits the rear shaft crown 24 or the magnetic body 23 to push the push rod 14, and the tip of the push rod 14 moves the rear end of the push cylinder 10. It is designed to be pressed, and the magnetic body 23 hits the edge of the fitting recess 12.

Reference numeral 25 in the drawing denotes a clip.

The distance between the base 4 and the rear flange 6 of the sliding tip 5, the length of the pressing cylinder 10 and the push rod 14, the distance between the permanent magnet 11 and the magnetic body 23, the length of the ball-point pen refill 19, etc. Are determined in relation to each other.

As the fastening means for the front crown 13 and the rear crown 24, the permanent magnet 11 and the magnetic body 23 are used as the fastening means in the figure, but any other fastening means can be used.

[0013]

The present invention is embodied as described above. To use it, the rear shaft main body 20 is pulled backward to change the contracted state of FIG. 1 to the expanded state of FIG. Two
When the magnetic sticking of 3 is released, the pressing of the push rod 14 and the pressing cylinder 10 is released, and the sliding tip 5 is pulled inward by the ridge 7, and at the same time, the tip of the ballpoint pen refill 19 is exposed and the writing state is set.

Further, by pulling the rear shaft main body 20 rearward to the limit, the core ring 22 and the tips of the stopper pieces 16 and 16 are hooked, and the whole is in a long state, and the pressing cylinder 10 and the push rod 1 are provided.
4 is pushed up by the spring 7 and the sliding tip 5.

The inner surface of the rear shaft main body 20 is in sliding contact with the stopper pieces 16, 16 of the front shaft main body 3 so as not to be inadvertently contracted.

In order to bring the expanded state of FIG. 2 to the contracted state of FIG. 1, the rear shaft main body 20 is pushed forward so that the rear shaft crown 24 presses the push rod 14 and the pressing cylinder 10 to move the rear collar portion 6. By pushing and pushing the sliding tip 5 forward against the spring 7, the core tip of the ball-point pen refill 19 is hidden and at the same time the permanent magnet 11
Then, the magnetic body 23 is attracted and magnetically adhered, and the whole is put in a reduced state as shown in FIG.

[0017]

[Effect] The present invention, as described above, comprises a front shaft portion 1 and a rear shaft portion 2 slidably fitted to the front shaft portion 1 and capable of adjusting expansion and contraction.
The tip shaft portion 1 is a ballpoint pen in which a tip shaft body 3 having a cap 4 screwed into it and a lead cylinder 9 provided in the tip shaft body 3 are removably and tightly inserted so that the tip of the tip can freely protrude from the cap 4. A refill 19, a sliding tip 5 that can freely project to a position where the tip of the ballpoint refill is concealed via a spring 7 between the ballpoint refill and the cap, and a tip 5 that covers the core tube 9 and slides the tip. And a core tube 9 which is in contact with the spring 7 and can be pressed against the spring 7.
A fixed rod 8 fixed to the base end of the press barrel 10 and rotatably inserted through the base end of the press barrel 10, and a core pipe 9 fixed to the front crown 13 through the fixed rod 8 at the rear portion of the front shaft main body 3, A pressing cylinder 10 having an open end, which is capable of abutting on the sliding tip 5 and covers the core cylinder 9 and the other end of which is inserted into the fixed rod 8 so as to travel freely, and protrudes to the rear of the tip spindle body 3,
The rear shaft portion 2 is composed of a front shaft crown 13 having a fastening portion at its tip portion, and the rear shaft portion 2 is composed of a rear shaft main body 20 and a rear shaft crown 24 having a fastening body that can be fastened to the fastening portion. , Push rod 14 and push cylinder 1
No. 0 allows the sliding tip 5 to be pushed by pushing the rear shaft body 20 into the front shaft body 3, and the fastening body of the rear shaft crown 24 is stopped at the pushing position to the fastening portion of the front shaft body 3. Since it can be worn freely, it is possible to provide an item that is easy to write without changing the thickness of the conventional telescopic ball-point pen even if the thick ball-pen pen reel (commonly called the core) of the ink tank is used. it can.

[Brief description of drawings]

FIG. 1 is a sectional view of a ball-point pen of the present invention when it is reduced.

FIG. 2 is a sectional view of the ball-point pen when it is extended.

[Explanation of symbols]

 1 is a front shaft part 2 is a rear shaft part 3 is a front shaft body 4 is a base 5 is a sliding tip 7 is a spring 8 is a fixed rod 9 is a core cylinder 10 is a pressing cylinder 11 is a fastening portion 13 is a front shaft crown 14 is a push rod 19 is a ballpoint pen refill 20 is a rear shaft main body 23 is a fixed body 24 is a rear shaft crown

Claims (1)

(57) [Scope of utility model registration request] 1. A front shaft part (1) and a rear shaft part (2) slidably fitted to the front shaft part (1) and adjustable in expansion and contraction, the front shaft part (1) comprising:
A tip shaft main body 3 with a cap 4 screwed thereto, a ball-point pen refill 19 in which the tip of the tip is freely inserted into the core tube 9 provided in the tip shaft main body 3 so that the tip of the tip can freely protrude from the cap 4, and the ball-point pen. A sliding tip 5 that can freely protrude to a position where the core tip of the ballpoint pen refill is concealed via a ridge 7 between the refill and the base, and a tip that is in contact with the sliding tip 5 by covering the core tube 9 against the ridge 7. And a pressing rod 10 that can be pressed freely, and a fixed rod 8 that is fixed to the base end of the core pipe 9 and that is inserted through the base end of the pressing pipe 10 so that it can travel.
A front barrel body core tube 9 fixed to the front barrel crown 13 rear part through the fixed rod 8 of 3, front barrel provided behind the front barrel body 3 protrudes the fastening portion to the rear end crown 13, the rear shaft portion 2 is composed of a rear shaft main body 20 and a rear shaft crown 24 provided with a fastening body that can be fastened to the fastening portion, and the push rod 14 and the pressing cylinder 10 include the rear shaft body 20. Of the sliding tip 5 by pushing the
Is a retractable ball-point pen in which the fastening body 23 of the rear shaft crown 24 can be fastened to the fastening portion 11 of the front shaft main body 3 at the pushing position.