CN216507603U - Ball-point pen head - Google Patents

Abstract

The utility model provides a ball-point pen head belongs to writing tool part technical field. The ball-point pen head can comprise a ball, an elastic part and a ball seat body. Wherein, the elastic part can include elastic component and the ejector pin that is located elastic component one end, and the one end of ejector pin can support the surface of ball. The elastic part can comprise a first parallel ring, an elastic part body and a second parallel ring which are sequentially connected with each other. The ball seat body may include a ball seat body and a receiving cavity located inside the ball seat body. The ball seat body can include first face of cylinder and first conical surface, can also be provided with first arc surface between first face of cylinder and the first conical surface. The receiving chamber may include a first receiving chamber for receiving the elastic part and a second receiving chamber for receiving the ball. The ball can be pushed against the opening of the second accommodating cavity by the ejector rod so that the opening of the second accommodating cavity is closed. Thereby the ball can not discharge ink, the effect of sealing the ball to discharge ink is achieved, and the anti-drip ink-accumulating performance and the intermittent writing performance of the ball pen point are further improved.

Description

Ball-point pen head

Technical Field

The present disclosure relates to the field of writing instrument parts, and more particularly, to a ball point pen.

Background

The traditional neutral pen point is respectively in the shape of a bullet head, a gourd head, a full needle tube and a half needle tube. The gourd-shaped pen point is formed by cutting and processing wires, has the characteristics of good consistency, good pen point quality and good wear resistance of the cutting pen point, and has the characteristics of thin pen point, thin stitch and suitability for small ball diameter of a full needle tube pen point and a half needle tube pen point due to the thin front excircle. However, due to the limitation of the shape of the gourd head, the front excircle is too long, the spring cannot be stably arranged, the pen point cannot be sealed, the intermittent writing is poor, the gourd head cannot be matched with a pressing type, and the application field is relatively small.

The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide a ballpoint pen head capable of improving the anti-drip ink-accumulating performance and the intermittent writing performance of the ballpoint pen head.

In order to achieve the purpose, the technical scheme adopted by the disclosure is as follows:

according to a first aspect of the present disclosure, there is provided a ballpoint pen head comprising:

a ball;

the elastic part comprises an elastic piece and an ejector rod positioned at one end of the elastic piece, and one end of the ejector rod can prop against the surface of the ball; the elastic part comprises a first parallel ring, an elastic part body and a second parallel ring which are sequentially connected with one another, the number of the first parallel ring and the second parallel ring is multiple, and the diameter of each first parallel ring is not smaller than that of the second parallel ring;

the ball seat body comprises a ball seat body and an accommodating cavity positioned in the ball seat body; the ball seat body comprises a first cylindrical surface and a first conical surface, and a first arc surface is arranged between the first cylindrical surface and the first conical surface; the accommodating cavity comprises a first accommodating cavity for accommodating the elastic part and a second accommodating cavity for installing the ball;

when the elastic piece body extends, the ball can be propped against the opening of the second accommodating cavity by the ejector rod so that the opening of the second accommodating cavity is closed; when the elastic piece body contracts, the ball can drive the ejector rod to open the opening of the second accommodating cavity.

In an exemplary embodiment of the present disclosure, the first cylindrical surface includes a first sub-cylindrical surface and a second sub-cylindrical surface connected to each other, and a diameter of the first sub-cylindrical surface is smaller than a diameter of the second sub-cylindrical surface.

In an exemplary embodiment of the present disclosure, one end of the first sub-cylindrical surface is further provided with a first chamfer; and a second chamfer is arranged between the second sub-cylindrical surface and the first arc surface.

In an exemplary embodiment of the present disclosure, the first accommodating chamber includes a first sub-accommodating chamber, a second sub-accommodating chamber, a third sub-accommodating chamber, a fourth sub-accommodating chamber, a fifth sub-accommodating chamber, a sixth sub-accommodating chamber, a seventh sub-accommodating chamber, and an eighth sub-accommodating chamber that are sequentially connected to each other and descend step by step.

In an exemplary embodiment of the present disclosure, the second sub-receiving cavity is provided with a protrusion for fixing the first union ring.

In an exemplary embodiment of the present disclosure, the fifth sub-receiving cavity is shaped as a circular truncated cone, and one end of the fifth sub-receiving cavity close to the fourth sub-receiving cavity is used for fixing the second combining ring.

In an exemplary embodiment of the present disclosure, the material of the ball is tungsten carbide cemented carbide or zirconia ceramic.

In an exemplary embodiment of the disclosure, the ejector rod is located on a central axis of the first accommodating cavity and the second accommodating cavity.

In an exemplary embodiment of the present disclosure, a diameter of a cross section of the first conical surface ranges from 1.1mm to 0.75 mm.

In an exemplary embodiment of the present disclosure, a size of the first receiving chamber in a radial direction ranges from 1.5mm to 0.55 mm.

When the elastic piece body extends, the ball can be propped against the opening of the second accommodating cavity by the ejector rod so that the opening of the second accommodating cavity is closed. When the elastic piece body contracts, the ball can drive the opening of the second accommodating cavity to be opened under the driving of the ejector rod. So set up, just can be under the state of non-writing, through the opening in elastic component closed second holding chamber to make the ball can not go out the china ink, reach the effect of sealed ball, and then improve the anti drip ink accumulation performance and the intermittent type writing performance of ball-point pen point. In addition, the first cylindrical surface and the first conical surface are in transition through the arc surface, so that the whole ball-point pen head has streamline vision, and the vision during writing is not easy to be shielded. And the design of the arc surface can ensure that the ball-point pen point is not easy to clamp materials during processing, thereby improving the processing efficiency.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a cross section of a ballpoint pen tip according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a ballpoint pen tip according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural view of an elastic portion according to an embodiment of the present disclosure.

The reference numerals of the main elements in the figures are explained as follows:

100. a ball; 200. an elastic portion; 210. an elastic member; 211. a first doubling circle; 212. an elastic member body; 213. second doubling; 220. a top rod; 300. a ball seat body; 320. a first accommodating cavity; 3211. a first sub-accommodation cavity; 3212. a second sub-accommodation cavity; 3213. a third accommodating cavity; 3214. a fourth sub-accommodation cavity; 3215. a fifth sub-containing cavity; 3216. a sixth sub-accommodation cavity; 3217. a seventh sub-accommodation cavity; 3218. an eighth sub-accommodating cavity; 322. a second accommodating cavity; 323. and (5) dotting by using a spring.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the primary technical ideas of the disclosure.

When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.

The traditional neutral pen point is respectively in the shape of a bullet head, a gourd head, a full needle tube and a half needle tube. The gourd-shaped pen point is formed by cutting and processing wires, has the characteristics of good consistency, good pen point quality and good wear resistance of the cutting pen point, and has the characteristics of thin pen point, thin stitch and suitability for small ball diameter of a full needle tube pen point and a half needle tube pen point due to the thin front excircle. However, due to the limitation of the shape of the gourd head, the front excircle is too long, the spring cannot be stably arranged, the pen point cannot be sealed, the intermittent writing is poor, the gourd head cannot be matched with a pressing type, and the application field is relatively small.

In the present disclosure, referring to fig. 1 to 3, a ball-point pen tip may include a ball 100, a resilient portion 200, and a ball seat 300. The elastic part 200 may include an elastic member 210 and a plunger 220 located at one end of the elastic member 210, wherein one end of the plunger 220 can abut against the surface of the ball 100. The elastic member 210 may include a first parallel ring 211, an elastic member body 212, and a second parallel ring 213, which are sequentially connected to each other. The number of the first parallel turns 211 and the second parallel turns 213 is plural, and the diameter of each first parallel turn 211 is not smaller than the diameter of the second parallel turn 213. The ball seat body 300 may include a ball seat body and a receiving cavity inside the ball seat body. The ball seat body can include first face of cylinder and first conical surface, can also be provided with first arc surface between first face of cylinder and the first conical surface. The receiving cavities may include a first receiving cavity 320 for receiving the elastic part 200 and a second receiving cavity 322 for mounting the ball 100.

When the elastic body 212 is stretched, the ball 100 can be pushed against the opening of the second receiving cavity 322 by the push rod 220 so that the opening of the second receiving cavity 322 is closed. When the elastic body 212 contracts, the ball 100 can open the opening of the second accommodating cavity 322 under the driving of the rod 220. With such an arrangement, the opening of the second accommodating cavity 322 can be sealed by the elastic element 210 in a non-writing state, so that the ball 100 cannot discharge ink, the effect of sealing the ball 100 is achieved, and the anti-dripping ink-accumulating performance and the intermittent writing performance of the ball pen head are improved. In addition, the first cylindrical surface and the first conical surface are in transition through the arc surface, so that the whole ball-point pen head has streamline vision, and the vision during writing is not easy to be shielded. And the design of the arc surface can ensure that the ball-point pen point is not easy to clamp materials during processing, thereby improving the processing efficiency.

The following describes each component of the ballpoint pen head provided in the embodiments of the present disclosure in detail with reference to the accompanying drawings:

in one embodiment of the present disclosure, the first cylindrical surface may include a first sub-cylindrical surface and a second sub-cylindrical surface connected to each other, and a diameter of the first sub-cylindrical surface is smaller than a diameter of the second sub-cylindrical surface. Specifically, interconnect means that one end of first sub-cylindrical surface can link up with one end of second sub-cylindrical surface, passes through continuous transition between first sub-cylindrical surface and the second sub-cylindrical surface promptly and connects. The diameter of the first sub-cylindrical surface refers to the dimension of the first sub-cylindrical surface in the radial direction of the ballpoint pen head, and the radial direction of the ballpoint pen head is perpendicular to the central axis of the ballpoint pen head. Correspondingly, the diameter of the second sub-cylindrical surface refers to the dimension of the second sub-cylindrical surface in the radial direction of the ballpoint pen head. Because the diameter of the first sub-cylindrical surface is smaller than that of the second sub-cylindrical surface, the first sub-cylindrical surface and the second sub-cylindrical surface can be transited through the transition section, and therefore the first sub-cylindrical surface and the second sub-cylindrical surface can be conveniently machined.

Optionally, the first sub-cylindrical surface may further be provided with a spring dotting 323 for adjusting the position of the elastic portion 200, so as to perform a limiting function.

Optionally, the transition section may be a rounded corner or a chamfer, that is, the first sub-cylindrical surface and the second sub-cylindrical surface may be transited by a chamfer or a rounded corner. When the transition section is chamfered, the inclination angle is 45 °. Specifically, the included angle formed by the plane of the chamfer and the central axis surface of the ball-point pen head is 45 degrees.

In one embodiment of the present disclosure, one end of the first sub-cylindrical surface is further provided with a first chamfer; a second chamfer angle can be arranged between the second sub-cylindrical surface and the first arc surface. Specifically, the first chamfer may be disposed on a side of the first sub-cylindrical surface away from the elastic portion 200, and the second chamfer may be disposed between the second sub-cylindrical surface and the first arc surface as a transition.

Optionally, an included angle formed between the first chamfer and the central axis of the ball-point pen head may be 20 to 40 degrees. Preferably, the included angle formed by the first chamfer and the central axis of the ball point pen head can be 20 degrees, 25 degrees, 28 degrees, 30 degrees and 32 degrees. Correspondingly, the included angle formed by the second chamfer and the central axis of the ball-point pen head can be 15-30 degrees. Preferably, the included angle formed by the second chamfer and the central axis of the ball-point pen head can be 15 degrees, 20 degrees, 22 degrees and 24 degrees. The included angle formed by the first chamfer and the second chamfer and the central axis of the ballpoint pen head is not particularly limited, and the included angle is mainly used for enabling the ballpoint pen head to form a streamline vision on the whole.

In another embodiment of the present disclosure, one end of the first sub-cylindrical surface may be further provided with a first fillet; a second fillet can be arranged between the second sub-cylindrical surface and the first arc surface. Specifically, the first fillet can set up in the one side that elastic component 200 was kept away from to first cylinder face, and the second fillet can set up as the transition between second sub-cylinder face and first arc surface. Through setting up first fillet and second fillet, can be so that first face of cylinder becomes more slick and sly and mellow and full, also can make the transition between first face of cylinder and the first face of cylinder more smooth to further increased the streamlined vision of ball-point pen head, and then made the vision of user when writing can not receive the sheltering from.

Optionally, the size of the first rounded corner and the second rounded corner is not specifically limited in this disclosure. For example, the diameter of the first rounded corner may be 1mm, 1.2mm, 1.4 mm. Correspondingly, the diameter of the second rounded corner may be 2mm, 2.2mm, 2.5 mm.

In one embodiment of the present disclosure, the first receiving chamber 320 may also include a plurality of sub-receiving chambers having decreasing sizes toward the ball 100. That is, the smaller the size of the sub-pockets in the direction closer to the ball 100, the larger the size of the sub-pockets in the direction farther from the ball 100. The size and shape of each sub-containing cavity are not specially limited in the disclosure, so as to meet the circulation requirement of the ink. The shapes of the sub-containing cavities are the same or different.

Optionally, the first accommodating cavity 320 may include a plurality of mutually connected first sub-accommodating cavities 3211, a second sub-accommodating cavity 3212, a third sub-accommodating cavity 3213, a fourth sub-accommodating cavity 3214, a fifth sub-accommodating cavity 3215, a sixth sub-accommodating cavity 3216, a seventh sub-accommodating cavity 3217, and an eighth sub-accommodating cavity 3218 that are gradually lowered. Specifically, the first receiving cavity 320 and the second receiving cavity 322 may penetrate through the receiving cavity of the entire ball seat body 300. The first receiving chamber 320 and the second receiving chamber 322 are used for flowing ink, so that the ball 100 can be used for writing on a paper surface after being soaked by the ink. It will be appreciated that the sub-chambers are gradually lowered, i.e. the sub-chambers are reduced in size in the radial direction of the ballpoint pen head, and the size is reduced in the direction close to the ball 100, so that the first chamber 320 can be formed into a funnel-like shape. When writing, first holding chamber 320 is in the state of relative vertically for the writing surface like this, because first holding chamber 320 is the shape of funnel, can make the ink more easily circulate to ball 100 position and go out for ball 100 goes out the ink more easily, and then makes to write more smoothly.

Optionally, the size of the first accommodating cavity 320 along the radial direction of the ballpoint pen head ranges from 1.5mm to 0.55 mm. Specifically, the maximum dimension of the first receiving cavity 320 in the radial direction of the ballpoint pen head is 1.5mm, and the minimum dimension of the first receiving cavity 320 in the radial direction of the ballpoint pen head is 0.55 mm.

Optionally, the diameter of the cross section of the first conical surface ranges from 1.1mm to 0.75 mm. Specifically, the largest dimension of the first conical surface in the radial direction of the ballpoint pen head is 1.1mm, and the smallest dimension of the first conical surface in the radial direction of the ballpoint pen head is 0.75 mm. Compare thicker ball-point pen head among the prior art, through the design of first circular conical surface in this application for the ball-point pen head has "superfine" visual impact force, more is fit for the writing habit in the east. In addition, the thinner ball-point pen head can also ensure that the sight of a user is not easy to be shielded when the user writes, thereby being more convenient to write.

Alternatively, the second sub-receiving cavity 3212 may be provided with a protrusion for fixing the first ring 211 of the elastic part 200. Specifically, the protrusion may be located on an inner wall of the second sub-receiving cavity 3212 and surround an inner wall of the second receiving cavity 322. The first parallel ring 211 may be composed of a plurality of concentric circles with the same diameter and arranged tightly, or the first parallel ring 211 may be composed of a plurality of concentric circles with different diameters and arranged tightly. For example, the first combining ring 211 may include a plurality of concentric circles with diameters gradually decreasing toward the ball 100, so as to further increase the funnel-shaped visual sense of the first receiving cavity 320, thereby further increasing the flowing speed of the ink.

Optionally, the number of the concentric circles of the first ring 211 may be 3, 4, 5, 6, and the diameter thereof may range from 3.2mm to 3.6mm, and may be, for example, 3.2mm, 3.3mm, 3.4 mm. The number and size of the concentric circles are not particularly limited in this disclosure.

Optionally, the first ring 211 may have a certain weight, so that the ejector rod 220 is always located at the central axis of the ball point pen head, thereby preventing the ball 100 from deviating from the ball or from the groove.

Optionally, the fifth sub-accommodating cavity 3215 is shaped like a circular truncated cone, and one end of the fifth sub-accommodating cavity 3215, which is close to the fourth sub-accommodating cavity 3214, is used to fix the second parallel ring 213. Specifically, the projection of the fifth sub-receiving cavity 3215 on the central axis of the ballpoint pen head may be in the shape of a circular truncated cone. The circular truncated cone can comprise a first plane and a second plane which are oppositely arranged, and the diameter of the first plane is smaller than that of the second plane. The second parallel ring 213 can be clamped between the second plane and the inner wall of the fourth sub-receiving cavity 3214, so that the second parallel ring 213 can be fixed.

In an embodiment of the disclosure, the rod 220 may be disposed at one end of the second parallel ring 213, and the rod 220 can respectively pass through the fifth sub-accommodating cavity 3215, the sixth sub-accommodating cavity 3216, the seventh sub-accommodating cavity 3217, the eighth sub-accommodating cavity 3218, and the second accommodating cavity 322 to abut against the ball 100. It is noted that the rod 220 can be located on the central axis of the first and second cavities 320 and 322. That is, the central axis of the top rod 220 coincides with the central axes of the first accommodating cavity 320 and the second accommodating cavity 322. Therefore, the ejector rod 220 can be ensured to be always positioned on the central axis of the ball-point pen head, and the phenomenon that the ball 100 is inclined to the ball or clamped in the groove is avoided.

Alternatively, the shape of the top bar 220 may be a structure having a solid of revolution, and the top bar 220 may be, for example, a cylinder, a cone, or the like.

In an embodiment of the present disclosure, the elastic member body 212 may be a spring, and both ends of the spring may be connected to the first parallel ring 211 and the second parallel ring 213, respectively. When being in the non-state of writing, the spring is in the extension state, can make ejector pin 220 can push up all the time with ball 100 like this for ball 100 can seal the opening of second holding chamber 322, thereby plays sealed effect to the ink of holding intracavity, thereby can improve the anti-drip ink accumulation performance and the intermittent type writing performance of ball nib.

Alternatively, the spring may be a spring made of a metal material, or may also be a spring made of a non-metal material. For example, the material of the spring in the present disclosure may be carbon steel, alloy steel, stainless steel, copper alloy, nickel alloy, titanium alloy, or a combination thereof. In another embodiment of the present disclosure, the material of the spring may be natural rubber, plastic, fiber reinforced plastic, inorganic compound spring (ceramic).

In one embodiment of the present disclosure, the material of the ball seat body 300 may be lead brass, nickel cupronickel, and stainless steel. In the present disclosure, the ball seat body 300 is made of stainless steel wire coil with a vickers hardness of 240-280HV, the ball seat body 300 can be cut into short blanks with a suitable length by a blanking machine, the length of the cut blanks can be 11.20-11.80mm, and finally the ball-point pen head is processed by a full-automatic multi-station pen head machine.

In an embodiment of the present disclosure, a ballpoint pen tip is designed by using the technical solution disclosed in the present disclosure, and the specific dimensions of each component are as follows:

optionally, the ball seat body 300 is formed by cutting and processing a free-cutting stainless steel wire with Vickers hardness of 240-260HV and wire diameter of phi 2.3 mm. The total length of the ball-point pen head (containing the ball 100) is 11.55 +/-0.15 mm; the length of the first chamfer is 0.4mm, and the included angle of the first chamfer is 30 +/-2 degrees; the spring dotting point 323 is located at a position 1.7 +/-0.1 mm away from the tail end of the first sub-containing cavity 3211, and the maximum dotting diameter is 1.2 +/-0.2 mm.

Optionally, the size of the first sub-cylindrical surface in the axial direction of the ball-point pen head is 3.5 ± 0.1mm, and the diameter is phi 2.00 ± 0.05 mm. The size of the second sub-cylindrical surface in the axial direction of the ball-point pen head is 4.0 +/-0.2 mm, and the diameter is phi 2.3 +/-0.1 m.

Optionally, the size of the second chamfer is 0.65 ± 0.05mm, and the included angle of the second chamfer is 22 ± 2 °. The radius of the first arc surface is 1.0 +/-0.1 mm.

Optionally, the diameter of the first sub-accommodation cavity 3211 is 1.50 ± 0.05mm, the diameter of the second sub-accommodation cavity 3212 is 40 ± 0.05mm, the diameter of the third sub-accommodation cavity 3213 is 1.25 ± 0.05mm, the diameter of the fourth sub-accommodation cavity 3214 is 1.10 ± 0.05mm, and the angle of the taper angle of the fifth sub-accommodation cavity 3215 is 42 ± 2 °; the diameter of the sixth sub-accommodation cavity 3216 is phi 0.65 ± 0.05mm, the diameter of the seventh sub-accommodation cavity 3217 is 0.60 ± 0.05mm, and the diameter of the eighth sub-accommodation cavity 3218 is 0.55 ± 0.05 mm; the diameter of the second accommodating cavity 322 is 0.30 mm plus or minus 0.03 mm.

Alternatively, the spring of the elastic part 200 may be formed by machining a stainless steel wire having a diameter of 0.13 mm. The first coil 211 is a 4-6 coil spring with gradually reduced diameter, and the maximum diameter is 1.36 +/-0.04 mm. The elastic element body 212 is 30-35 effective springs, the outer diameter is 1.05 +/-0.05 mm, the spring pitch is 0.18-0.24mm, and the spring coils are designed to be equidistant. The second parallel ring 213 is a 3-5-turn and tight spring ring with the outer diameter of 1.05 +/-0.05 mm. The top rod 220 is a very slender cylinder with a total dimension length of 3.4 + -0.2 mm.

According to the disclosed ball-point pen head of this application, this disclosed embodiment still provides a match test that is used for ball-point pen head and multiple gel ink for verify the actual performance of the disclosed ball-point pen head of this application.

The first embodiment is as follows:

according to the application, a ball-point pen point and A type neutral black ink are subjected to a matching test. The instrument used in the matching test is a German HUTT writing instrument, the writing angle is 70 degrees, the writing speed is 4.5m/min, the writing pressure is 1N, the stitch spacing is 1mm, and the writing interface is 70g of writing paper specified in ISO 14145. The neutral black ink in type A had a viscosity of 20331/652 pas (6r/60r), a surface tension of 39.2mN/m, a pH of 8.87 and an ink particle size D50 of 133 nm.

The ball-point pen point is arranged on a writing instrument, and the test result of the writing performance is as follows: the pen core with the ink filling amount of 1.05g has good initial writing performance, the average ink output is 98mg/m, the marking length reaches 900-plus-1100 m, the total abrasion amount of the bottom of the ball seat hole of the pen head is 0.012mm, the writing trace is normal, no ink accumulation exists in the pen head and the trace, and the writing performance meets the national standard requirement of the neutral pen core.

The ballpoint pen tips provided by the present disclosure were then tested for drip-proof ink build-up performance, intermittent writing performance limit, and other application performance tests.

Firstly, the anti-dripping and ink-accumulating performance of the ball-point pen point is subjected to relevant tests and compared with the existing common neutral gourd head pen point. After matching is finished, all pen cores are uncapped, the pen points are placed and suspended in a standing mode, the ball-point pen point disclosed by the invention is not found to have any ink dripping accumulation within 24 hours, and the ordinary gel ink bottle gourd head pen point under the same test condition has 8% of serious ink accumulation. The ball-point pen point and the type A neutral black ink matched pen core have good anti-drip ink accumulation performance which is superior to that of a compared common neutral gourd head pen point;

next, a relevant test was conducted on the intermittent writing performance limit of the ballpoint pen tip of the present disclosure, and compared with the existing ordinary gel ink bottle gourd pen tip, all pen tips after the initial writing were taken off the cap and laid flat in a constant temperature and humidity test room at 23 ℃ and 50% RH, and the initial writing was performed again after 1, 3, 7, 15, 30, 60, and 90 days. The test result is that the ball-point pen head of the present disclosure writes for the first time after 90 days of uncapping, the pen is opened normally, and the limit intermittent writing result is more than 90 days; and the compared common neutral gourd nib has broken line and single side within 100mm after 15 days, and the limit intermittent writing result is 7-15 days. The ball-point pen point and the neutral black ink A matched pen core have good intermittent writing performance which is superior to that of a compared common neutral gourd head pen point;

finally, in other application performance tests, the high-temperature storage property, the low-temperature resistance, the drying resistance, the writing smoothness and the like all accord with the industrial or enterprise standards. Therefore, the ball-point pen point provided by the disclosure is matched with the A type neutral black ink, the writing performance and the general application performance are qualified, the anti-drip ink accumulation performance and the intermittent writing performance are superior to those of the conventional neutral gourd pen point, and the ball-point pen point can be applied to a pressing type pen core.

Example two:

according to the application, a ball-point pen point and B type neutral quick-drying ink are subjected to a matching test. The instrument used in the matching test is a German HUTT writing instrument, the writing angle is 70 degrees, the writing speed is 4.5m/min, the writing pressure is 1N, the stitch spacing is 1mm, and the writing interface is 70g of writing paper specified in ISO 14145. In addition, the viscosity of the neutral quick-drying ink in B type is 344/90 mPas (6r/60r), the surface tension is 34.4mN/m, the pH value is 8.56, and the ink particle size D50 is 60 nm.

The ball-point pen point is arranged on a writing instrument, and the test result of the writing performance is as follows: the pen core with the ink filling amount of 1.05g has good initial writing performance, the trace drying time is 2-3s, the average ink output is 136mg/m, the scribing length reaches 700-900m, the total abrasion amount of the bottom of the ball seat hole of the pen head is 0.015mm, the writing trace is normal, no ink accumulation exists in the pen head and the trace, and the writing performance meets the marking requirement of the gel pen core.

The ballpoint pen tips provided by the present disclosure were then tested for drip-proof ink build-up performance, intermittent writing performance limit, and other application performance tests.

Firstly, the anti-dripping and ink-accumulating performance of the ball-point pen point is subjected to relevant tests and compared with the existing common neutral gourd head pen point. After matching is finished, all pen cores are uncapped, the pen points are placed and suspended in a standing mode, the ball-point pen point disclosed by the invention is not found to have any ink dripping accumulation within 24 hours, and the ordinary gel ink bottle gourd head pen point under the same test condition has 20% of serious ink accumulation. The ball-point pen point and the B type neutral quick-drying ink matched pen core have good anti-drip ink-accumulation performance, and are superior to the compared common neutral gourd head pen point.

Next, a relevant test was conducted on the intermittent writing performance limit of the ballpoint pen tip of the present disclosure, and compared with the existing ordinary gel ink bottle gourd pen tip, all pen tips after the initial writing were taken off the cap and laid flat in a constant temperature and humidity test room at 23 ℃ and 50% RH, and the initial writing was performed again after 1, 3, 7, 15, 30, 60, and 90 days. The test result is that the ball-point pen head of the present disclosure writes for the first time again after 90 days of uncapping, the pen is opened normally, and the limit intermittent writing result is >90 days. And the compared common neutral gourd nib has broken line and single side within 100mm after 30 days, and the limit intermittent writing result is 15-30 days. The ball-point pen point and the B type neutral quick-drying ink have good intermittent writing performance matched with the pen core, and are superior to the compared common neutral gourd head pen point;

finally, in other application performance tests, the high-temperature storage property, the low-temperature resistance, the drying resistance, the writing smoothness and the like all accord with the industrial or enterprise standards. Therefore, the ball-point pen head provided by the disclosure is matched with the B type neutral quick-drying ink, the writing performance and the general application performance are qualified, the anti-dripping ink-accumulating performance and the intermittent writing performance are superior to those of the conventional neutral gourd pen head, and the ball-point pen head can be applied to a pressing type pen core.

Example three:

according to the application, the ball-point pen head is matched with the C-class environment-friendly emulsified medium-blue ink for testing. The instrument used in the matching test is a German HUTT writing instrument, the writing angle is 70 degrees, the writing speed is 4.5m/min, the writing pressure is 1N, the stitch spacing is 1mm, and the writing interface is 70g of writing paper specified in ISO 14145. In addition, the viscosity of the oil-blue ink in the C-class environment-friendly emulsion is 344/90mPa s (6r/60r), the surface tension is 34.4mN/m, the pH value is 8.56, and the ink particle size D50 is 60 nm.

The ball-point pen point provided by the disclosure is arranged on a writing instrument, and the test result of the writing performance is as follows: the pen core with the ink filling amount of 0.20g has good initial writing performance, the average ink output is 32mg/m, the marking length reaches 600-750m, the total abrasion amount of the bottom of the ball seat hole of the pen head is 0.002mm, the writing trace is normal, no ink accumulation exists in the pen head and the trace, the writing performance meets the enterprise and mark requirements of the emulsified medium oil pen core, and the ink accumulation condition of the trace is superior to that of the common medium oil gourd head pen head.

The ballpoint pen tips provided by the present disclosure were then tested for drip-proof ink build-up performance, intermittent writing performance limit, and other application performance tests.

Firstly, the anti-dripping and ink-accumulating performance of the ball-point pen head disclosed by the invention is subjected to relevant tests and compared with the existing common neutral gourd head pen head. After matching is finished, all pen cores are uncapped, the pen points are placed and suspended in a standing mode, the ball-point pen point disclosed by the invention is not found to have any ink dripping accumulation within 24 hours, and the common gel ink bottle gourd head pen point under the same test condition has 24% of serious ink accumulation. The ball-point pen head and the C-type environment-friendly emulsified Chinese cabbage ink matched pen core have good anti-dripping and ink-accumulating performance, and are superior to the compared common neutral gourd head pen head.

Next, a relevant test was conducted on the intermittent writing performance limit of the ballpoint pen tip of the present disclosure, and compared with the existing ordinary gel ink bottle gourd pen tip, all pen tips after the initial writing were taken off the cap and laid flat in a constant temperature and humidity test room at 23 ℃ and 50% RH, and the initial writing was performed again after 1, 3, 7, 15, 30, 60, and 90 days. The test result is that the ball-point pen head of the present disclosure writes for the first time after 90 days of uncapping, the pen is opened normally, and the limit intermittent writing result is >90 days. The ball-point pen head and the C-type environment-friendly emulsified Chinese ink matched pen core have good intermittent writing performance, and are superior to the compared common neutral gourd head pen head.

Finally, in other application performance tests, the high-temperature storage property, the low-temperature resistance, the drying resistance, the writing smoothness and the like all accord with the industrial or enterprise standards. Therefore, the ball-point pen tip provided by the disclosure is matched with the C-type environment-friendly emulsified Chinese ink, the writing performance and the general application performance are qualified, the anti-dripping ink-accumulating performance and the intermittent writing performance are superior to those of the conventional neutral gourd-shaped pen tip, and the ball-point pen tip can be applied to a pressing type pen core.

Example four:

according to the application, a ball-point pen head and D type medium oil red ink are subjected to matching test. The instrument used in the matching test is a German HUTT writing instrument, the writing angle is 70 degrees, the writing speed is 4.5m/min, the writing pressure is 1N, the stitch spacing is 2mm, and the writing interface is 70g of writing paper specified in ISO 14145. In addition, the oil red ink in the D type has the viscosity of 1428/1405 mPas (6r/60r), the surface tension of 34.5mN/m and the pH value of 7.52.

The ball-point pen point provided by the disclosure is arranged on a writing instrument, and the test result of the writing performance is as follows: the pen core with the ink filling amount of 0.20g has good initial writing performance, the average ink output is 15mg/m, the scribing length reaches 1200-1500m, the total abrasion amount of the bottom of the ball seat hole of the pen head is 0.003mm, the writing trace is normal, no ink accumulation exists in the pen head and the trace, the writing performance meets the requirement of the pen mark of the medium oil ball pen core, and the ink accumulation condition of the trace is superior to that of the common medium oil gourd head pen head.

The ballpoint pen tips provided by the present disclosure were then tested for drip-proof ink build-up performance, intermittent writing performance limit, and other application performance tests.

Firstly, the anti-dripping and ink-accumulating performance of the ball-point pen point is subjected to relevant tests and compared with the existing common neutral gourd head pen point. After matching is finished, all pen cores are uncapped, the pen points are placed and suspended in a standing mode, any ink dripping and accumulating phenomenon is not found in the ball-point pen point in the 24-hour period, and 6% of serious ink accumulating phenomenon exists in the ordinary gel-ink bottle gourd head pen point under the same test condition. The ball-point pen point and the type D oil-red ink matched pen core have good anti-drip ink-accumulation performance, and are superior to the compared common gel-ink bottle gourd head pen point.

Next, a relevant test was conducted on the intermittent writing performance limit of the ballpoint pen tip of the present disclosure, and compared with the existing ordinary gel ink bottle gourd pen tip, all pen tips after the initial writing were taken off the cap and laid flat in a constant temperature and humidity test room at 23 ℃ and 50% RH, and the initial writing was performed again after 1, 3, 7, 15, 30, 60, and 90 days. The test result is that the ball-point pen head of the present disclosure writes for the first time after 90 days of uncapping, the pen is opened normally, and the limit intermittent writing result is >90 days. The ball-point pen point has good intermittent writing performance with the type-D oil-red ink matched pen core, and is superior to the compared common gel gourd head pen point.

Finally, in other application performance tests, the high-temperature storage property, the low-temperature resistance, the drying resistance, the writing smoothness and the like all accord with the industrial or enterprise standards. Therefore, the ball-point pen head provided by the disclosure is matched with the type-D oil red ink, the writing performance and the general application performance are qualified, the anti-drip ink-accumulation performance and the intermittent writing performance are superior to those of the conventional gel ink gourd pen head, and the ball-point pen head can be applied to a pressing type pen core.

It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the present specification. The present disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present disclosure. The embodiments of this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.

Claims (10)

1. A ballpoint pen head, comprising:

a ball;

the elastic part comprises an elastic piece and an ejector rod positioned at one end of the elastic piece, and one end of the ejector rod can prop against the surface of the ball; the elastic part comprises a first parallel ring, an elastic part body and a second parallel ring which are sequentially connected with one another, the number of the first parallel ring and the second parallel ring is multiple, and the diameter of each first parallel ring is not smaller than that of the second parallel ring;

the ball seat body comprises a ball seat body and an accommodating cavity positioned in the ball seat body; the ball seat body comprises a first cylindrical surface and a first conical surface, and a first arc surface is arranged between the first cylindrical surface and the first conical surface; the accommodating cavity comprises a first accommodating cavity for accommodating the elastic part and a second accommodating cavity for installing the ball;

when the elastic piece body extends, the ball can be propped against the opening of the second accommodating cavity by the ejector rod so that the opening of the second accommodating cavity is closed; when the elastic piece body contracts, the ball can drive the ejector rod to open the opening of the second accommodating cavity.

2. The ballpoint pen tip as recited in claim 1, wherein the first cylindrical surface comprises a first sub-cylindrical surface and a second sub-cylindrical surface connected to one another, the first sub-cylindrical surface having a diameter less than a diameter of the second sub-cylindrical surface.

3. The ballpoint pen tip as described in claim 2, wherein one end of said first sub-cylindrical surface is further provided with a first chamfer; and a second chamfer is arranged between the second sub-cylindrical surface and the first arc surface.

4. The ballpoint pen head as described in claim 2, wherein the first receiving chamber comprises a first sub receiving chamber, a second sub receiving chamber, a third sub receiving chamber, a fourth sub receiving chamber, a fifth sub receiving chamber, a sixth sub receiving chamber, a seventh sub receiving chamber, and an eighth sub receiving chamber which are sequentially connected with each other and descend step by step.

5. The ballpoint pen head as in claim 4, wherein said second sub-housing chamber is provided with a projection for fixing said first side ring.

6. The ballpoint pen head as recited in claim 4, wherein the fifth sub-receiving chamber is shaped as a circular truncated cone, and one end of the fifth sub-receiving chamber, which is close to the fourth sub-receiving chamber, is used for fixing the second parallel ring.

7. The ballpoint pen tip as claimed in claim 1, wherein the material of the ball is tungsten carbide cemented carbide or zirconia ceramic.

8. The ballpoint pen tip as recited in claim 1, wherein said plunger is located on a central axis of said first receiving chamber and said second receiving chamber.

9. The ballpoint pen tip as described in claim 1, wherein the diameter of the cross section of said first conical surface ranges from 1.1mm to 0.75 mm.

10. The ballpoint pen tip as recited in claim 1, wherein the first receiving chamber has a dimension in the radial direction in the range of 1.5mm to 0.55 mm.

Images