CN202021960U

CN202021960U - Ball-point pen

Info

Publication number: CN202021960U
Application number: CN2011200796056U
Authority: CN
Inventors: 张晟廷
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-03-16
Filing date: 2011-03-16
Publication date: 2011-11-02
Anticipated expiration: 2021-03-16

Abstract

A ball-point pen comprises a ball-point pen head, a ball-point pen refill consisting of a ball-point pen refill rod, a pen sleeve and a rear cover, and is characterized in that the rear cover internal threads are matched with pen sleeve external threads, the rear cover internal cover of the rear cover is tightly attached to the end surface of the ball-point pen refill rod, the total length of the rear cover ranges between 10mm and 20mm, the diameter of the external circle of the rear cover ranges between 8mm and 15mm, the external end of the rear cover takes on a semispherical shape, and the density of the rear cover is greater than 7 gram per cubic centimeter. By adopting the technical scheme, the probability that the pen tip is upwards is greatly increased when the ball-point pen falls onto the ground from high altitude unexpectedly, so that the ball-point pen avoids damage, and the service life of the ball-point pen is effectively prolonged; and the ball-point pen has the beneficial effects that the conception is novel, the manufacture is simple, the pen has no complicated operations, the higher where the pen falls off, the higher the probability that the pen tip is upward, and the ball-point pen is easy to manufacture and promote.

Description

A kind of ball pen

Affiliated technical field

The utility model relates to the stationery ball pen, allows up a kind of ball pen of nib when particularly falling on the ground easily.

Background technology

There is investigation to show, the maximum likelihood that ball pen the ballpoint pen oil that do not wait the inside to use up with regard to can not writing word is: fallen on the ground often due to the sphere polishing that has destroyed the written ball of ball pen, therefore there is the people to manufacture the pen core of ball pen very short to save ballpoint pen oil, but facts have proved impracticablely, and the written cost of ball pen will be higher than the ballpoint pen oil cost.China's patent No.: 201020000331.2 adopt spring buffers alleviating the impact to ball pen head, but spring buffer also is accompanied by to have write and starts to write not simply, and ball pen head remains nib stressed damage earlier when landing earlier, so protects effect limited.Our student has subconsciously ball pen the is played custom of rotation among finger of people often in study, ball pen falls on the ground unavoidable.

Summary of the invention

The purpose of this utility model provides a kind of ball pen, can guarantee to allow easily when it falls on the ground nib avoid damaging to the full extent up, the technical solution that adopts is: a kind of ball pen, comprise refill for ball-point pen and the pen cap and bonnet that ball pen head and ball pen core bar are formed, its special feature is that the bonnet internal thread of bonnet cooperates with pen cap external screw thread and covers pen cap external screw thread, the end face that the bonnet inner core is close to the ball pen core bar fixes refill for ball-point pen, the total length of bonnet is between 10 millimeters to 20 millimeters, the outside diameter of bonnet is between 8 millimeters to 15 millimeters, and the density of bonnet is greater than 7 gram/cubic centimetres.The bonnet outer end is shaped as hemisphere face can reduce the aerial resistance of motion of bonnet, and the space of staying between the ball pen core bar and the pen cap also reduces global density of the present utility model.So the structure selection can guarantee that the local density at bonnet position of living in is more than 5 times of the utility model ensemble average density.This technical scheme can make the utility model nib probability up when high-order accident falls on the ground improve greatly, thereby avoids damaging, and effectively prolongs ball pen head service life.

The beneficial effects of the utility model are: novel, make simply, there is not the troublesome operation step, and to land from eminence, nib probability up is high more when falling on the ground, and is convenient to make and promote.

Description of drawings

Accompanying drawing is a section situation of the present utility model.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawings: ball pen head 1 and ball pen core bar 3 combined integrated formation refill for ball-point pens, refill for ball-point pen selects for use ball pen core bar 3 external diameters less than common refill for ball-point pen on 4 millimeters the market; The bonnet internal thread 41 of bonnet 4 is M12X1, and bonnet inner core 42 is slightly less than 8 millimeters for external diameter, and the total length of bonnet 4 is 15 millimeters, and 12 millimeters of the outside diameters of bonnet 4, the material of bonnet 4 are the metallic copper of density 8.7 gram/cubic centimetres; The pen cap 2 is the nonmetal plastics of 1 millimeter of 8 millimeters of internal diameters and thickness, and pen cap external screw thread 21 is M12X1.Refill for ball-point pen is put in the pen cap 2, the bonnet internal thread 41 of bonnet 4 cooperates with pen cap external screw thread 21 and covers pen cap external screw thread 21, the end face that bonnet inner core 42 is close to ball pen core bar 3 fixes refill for ball-point pen, forms 10 millimeters of diameters, a kind of ball pen of long 14 millimeters.After measured, this structure selection has accomplished that the local density at bonnet 4 positions of living in is more than 5 times of the utility model ensemble average density, and bonnet 4 outer ends are shaped as hemisphere face 43 can reduce the bonnet 4 aerial resistances of motion.

In general, land from lower, because of the acceleration of gravity limited time, impulsive force is also little, and is also little to the injury of ball pen head; Land from eminence, because of the acceleration of gravity time lengthening, impulsive force is also big, and is also big to the injury of ball pen head.Through evidence: when the utility model fell on the ground at random 0.4 meter eminence, the probability that its nib lands dropped to below 1/10th; When 0.7 meter eminence fell on the ground, the probability that its nib lands dropped to below a thirtieth; The probability that nib lands when 1 meter eminence falls on the ground drops to be had only below 1/50th.Practice explanation falls on the ground at random from a high position, and the counterweight effect of bonnet 4 is brought into play obviously more, thereby effectively prolongs ball pen head service life.

Claims

1. ball pen, comprise refill for ball-point pen and the pen cap (2) and bonnet (4) that ball pen head (1) and ball pen core bar (3) are formed, the bonnet internal thread (41) that it is characterized in that bonnet (4) cooperates with pen cap external screw thread (21), the bonnet inner core (42) of bonnet (4) is close to the end face of ball pen core bar (3), and the total length of bonnet (4) is between 10 millimeters to 20 millimeters, the outside diameter of bonnet (4) is between 8 millimeters to 15 millimeters, the outer end (43) of bonnet (4) is the hemisphere face shape, and the density of bonnet (4) is greater than 7 gram/cubic centimetres.