JPH0627433Y2 - Telescopic ballpoint pen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a telescopic ball-point pen.

(Prior art and its problems) Conventionally, in this type of ball-point pen, the front shaft main body was slidably inserted into the rear shaft main body, and the rear shaft main body was moved forward and backward to expand and contract. This means has been studied to improve the drawbacks of the conventional telescopic ballpoint pen, and the rear shaft body is slidably inserted into the front shaft body so that the telescopic operation can be performed. , Is to provide a tasteful ballpoint pen.

The present invention will be described in detail with reference to the illustrated embodiment.
And a rear shaft portion 2 slidably inserted in the front shaft portion 1,
The front shaft portion 1 is a tubular front shaft main body 3, a base 4 screwed to the tip of the front shaft main body 3, a rear part which is fixed to the base 4 and a sliding front base 5, which will be described later, and extends rearward. A sliding tip 5 slidably inserted between the collar 6 and the mouthpiece 4 through a sliding ring 7 that stops at the mouthpiece 4 and a spring 8, and is fixed inside the tip spindle body 3 through a core holder 9. Iron having a core tube 10 having a length to be inserted up to the middle part of the sliding tip 5 and a fitting recess 12 fixed to the rear part of the core tube 10 and internally provided so that the permanent magnet 11 does not project. The front crown 13 made of a magnetic material and an insertion hole 14 formed so as to pass through the front crown 13 in the front and rear direction are inserted so as to be movable back and forth, and the front end is a rear collar portion of the sliding tip 5. It is composed of a push rod 15 which can push 6 freely.

The joint portion 16 between the front shaft portion 1 and the rear shaft portion 2 is formed by the rear shaft body 2 described later.
Non-magnetic stopper pieces 17, 17 are abutted on the front end of 2, and projections 18, 18 projecting from the inner surface of the stopper pieces 17, 17 are fitted into holes 19 penetrating the rear shaft body 22. The stopper pieces 17, 17 are adapted to abut against an abutting portion 24 of a core ring 25, which will be described later, provided at the rear end of the front shaft main body 3 so as to prevent the stopper ring 17 from coming off. .

The core cylinder 10 is fitted and fixed to the insertion portion 13 ′ of the front crown 13, and the ball cylinder refill 2 is attached to the core cylinder 10.
The insertion portion 13 ′ is provided with a cut-out portion 21 so as not to block the mouth of the ball-point pen refill 20. The top surface of the permanent magnet 11 is prevented from protruding from the fitting recess 12, and the fitting recess 12 and the rear shaft main body 22 described later are provided.
A gap 23 is provided between them.

The rear shaft portion 2 is fixed to the rear shaft main body 22, the above-mentioned stopper pieces 17 and 17 abutting on the front end of the rear shaft main body 22, and the inner end of the rear shaft main body 22 so as to be magnetically attached to the permanent magnet 11. It is composed of a rear shaft crown portion 27 in which a magnetic body 26 such as iron is provided. When the rear shaft body 22 is pushed into the front shaft body 3, the permanent magnet 11 resists the magnetic body 26 against the spring 8. Simultaneously with magnetic attachment, the rear end of the push rod 15 hits the rear shaft crown portion 27 or the magnetic body 26 to push the push rod 15, and the magnetic body 26 contacts the edge of the fitting recess 12.

The distance between the sliding ring 7 that stops at the mouthpiece 4 and the rear flange portion 6 of the sliding tip 5, the length of the push rod 15, the distance between the permanent magnet 11 and the magnetic body 26, the length of the ball-point pen refill 20, etc. Are determined in relation to each other.

(Operation) The present invention is embodied as described above. To use this, in order to change from the contracted state to the expanded state, the rear shaft main body 22 is pulled by holding the rear shaft crown portion 27, and the permanent magnet 11 When the magnetic sticking of the magnetic body 26 is released, the pressing of the push rod 15 is released, and the sliding tip 5 is pulled inward by the ridge 8, and at the same time, the tip of the ball-point pen refill 20 is exposed and the writing state is set. At this time, the rear flange portion 6 of the sliding tip 5 is hooked on the tip surface 9 ′ of the lead holder 9. Further, by pulling the rear shaft main body 22 rearward to the limit, the abutting portion 24 of the core ring 25 and the tips of the stopper pieces 17 and 17 are hooked, and the whole state becomes long, and the push rod 15 and the sliding tip 5 It is released from the rear shaft crown portion 27. The inner surface of the front shaft main body 3 has stopper pieces 17, 1 of the rear shaft main body 22.
It is in sliding contact with 7 so that it will not shrink carelessly.

In order to bring it into a contracted state, the rear shaft main body 22 is pushed out forward so that the rear shaft crown portion 27 presses the push rod 15 to make the rear flange portion 6 and the sliding tip 5 against the spring 8 forward. Extrude and hide the tip of the ballpoint pen refill 20 and at the same time make permanent magnet 1
1 and the magnetic body 26 are attracted and magnetically attached, and the whole is contracted as shown in FIG.

(Effect) The present invention comprises the front shaft portion 1 and the rear shaft portion 2 slidably inserted into the front shaft portion 1 and adjustable for expansion and contraction as described above.
Is a ball-point pen refill 2 in which a tip 4 is screwed into a tip shaft main body 3 and a core cylinder 10 fixed inside a tip shaft main body via a core holder 9 so as to be removably inserted and the tip of the tip is projected from the base.
0, a sliding tip 5 that can freely project to a position where the tip of the ballpoint pen refill is concealed via a ridge 8 between the ballpoint pen refill and the base, and a sliding tip that extends to the rear of the tip shaft portion 1. A push rod 15 which can be pressed against the spring 8, an insertion portion 13 'for inserting the core cylinder 10 and a permanent magnet 11 are provided inside the front shaft main body 3 so that the top surface does not project. Front crown 13 made of a magnetic material and provided with the fitting recess 12
The rear shaft portion 2 is composed of the rear shaft main body 22 and the rear shaft crown portion 27 in which the magnetic body 26 is provided. The push rod 15 is formed by pushing the rear shaft main body 22 into the front shaft main body 3. Sliding tip 5
Since the magnetic body 26 of the rear shaft crown portion 27 can be magnetically attached to the permanent magnet 11 of the front shaft main body 3 at the push-in position, only the push-in / pull-out operation of the rear shaft main body 22 of the ball-point pen refill 20 can be performed. The tip of the ballpoint pen refill does not inadvertently protrude from the tip of the sliding tip 5 when the tip of the ballpoint pen refill is inadvertently retracted and the writing or storing operation is smooth. There is no risk of soiling.

Further, since the tip of the ball-point pen refill projects before the rear shaft portion 2 extends to the limit, it can be conveniently shortened or lengthened for use in writing, which is convenient.

Further, a core ring 25 is provided at the rear end of the front shaft body 3, and the core ring 25 and the stopper pieces 17, 17 provided on the outer periphery of the front end of the rear shaft body 22 are made to strike each other, so that a strong expansion and contraction operation is possible. Even if the rear end of the front shaft main body 3 does not expand, a smooth expansion and contraction operation can always be performed, a gap is provided between the front shaft crown 13 and the rear shaft main body 22, and the permanent magnet 1
Since 1 is provided internally so as not to project from the fitting recess 12, the magnetism of the permanent magnet 11 is concentrated and circulated in the front crown 13, the magnetic body 26, and the gap 23 at the time of reduction, so that Leakage is minimized and the magnetic card etc. is not damaged.

By making the shape of the sliding tip 5 and the shape of the rear shaft crown portion 27 of the rear shaft body 22 the same or similar, a compact ballpoint pen can be provided.

[Brief description of drawings]

 The drawing is a sectional view of the ball-point pen of the present invention when it is reduced. 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 6 is a rear flange part 7 is a sliding ring 8 is a spring 9 is a core holder 10 is a core cylinder 11 is a permanent magnet 12 Is a fitting recess 13 is a front shaft crown 15 is a push rod 17, 17 is a stopper piece 20 is a ballpoint pen refill 23 is a gap 24 is an impact part 25 is a core ring 26 is a magnetic body 27 is a rear shaft crown

Claims (1)

[Scope of utility model registration request] 1. A front shaft portion 1 and a rear shaft portion 2 slidably inserted into the front shaft portion 1 and adjustable in expansion and contraction. The front shaft portion 1 has a front shaft main body 3 to which a cap 4 is screwed. And a ball-point pen refill 20 in which the tip of the tip is projected from the base 4 by being removably and tightly inserted into a lead tube 10 fixed in the tip spindle body 3 via a lead holder 9.
A sliding tip 5 that is freely projectable to a position where the core of the ball-point pen refill is concealed via a spring 8 between the ball-point pen refill and the base, and a sliding tip 5 that extends to the rear of the front shaft portion 1. A push rod 15 that can be pressed against the spring 8, an insertion portion 13 ′ for inserting the core tube 10 and a permanent magnet 11 inside the front spindle body 3 so as not to project outside. The front shaft crown 13 made of a magnetic material provided with the fitting recess 12 and a core ring 25 having an abutting portion 24 fixed to the rear end of the front shaft body 3 are provided. 22 and magnetic body 2
6 is composed of the rear shaft crown portion 27 in which the push rod 1 is attached.
Reference numeral 5 allows the sliding tip 5 to be freely pushed by pushing the rear shaft body 22 into the front shaft body 3, and the magnetic body 26 of the rear shaft crown portion 27 and the permanent magnet 11 of the front shaft body 3 at the pushing position. The front shaft portion 1 and the rear shaft portion 2 are made to be magnetically attachable, and the joint portion 16 of the front shaft portion 2 is composed of non-magnetic stopper pieces 17, 17 that are attached in contact with the front end of the rear shaft main body 22. 17
Is an extendable ball-point pen that is capable of abutting against an abutting portion 24 of a core ring 25 and has a gap 23 between the fitting recess 12 and the rear shaft body 22.