A cylindrical pen

Abstract

The application discloses a cylindrical pen and relates to the technical field of stationery supplies, which comprises a shell, a supporting layer fixedly connected in the shell, the supporting layer being adapted to a forefinger structure and used for covering the forefinger, two bevel-shaped structures of the supporting layer being adapted to the forefinger tips, a fixing assembly arranged at the top of the shell and used for fixing a pen barrel or a pen core. Therefore, the cylindrical pen can effectively prevent myopia of students, solves the social pain point problem, and has the advantages of improving writing quality and speed and making writing easier.

Description

TECHNICAL FIELD

[0001] The present application relates to stationery technical field, especially a kind of cylindrical pen. BACKGROUND

[0002] The neutral pen, pen, pencil and the like used in people's daily life and work are collectively referred to as hard pen. Writing with hard pen not only has a high requirement for the flexibility of pen operation, but also has a high requirement for the accuracy of writing. In the case of correct pen holding posture, after long-term training, the user can write smoothly and fluently. If the pen holding posture is not correct, the writing becomes intermittent, light and heavy, and extremely difficult, and the sitting posture is also forced to deform.

[0003] Writing with hard pen is a difficult thing for ordinary people, so where is the difficulty and how to solve the problem? Let's try to analyze it.

[0004] In writing, the paper surface will give the pen tip a vertical paper surface upward elastic force T and a parallel paper surface sliding friction force t. No matter what the angle between the pen barrel and the paper surface is, the directions of T and t will not change. The middle three fingers of the thumb and the index finger will each give the pen a vertical elastic force to the pen barrel (the three forces are combined as Fn), and the root of the index finger will give the pen an elastic force (F4). The directions of the four elastic forces (collectively referred to as F) are different, but they are all perpendicular to the contact surface of the finger and the pen, and parallel to each other. Now, assume that the pen is perpendicular to the paper surface and the direction of the elastic force received by the root of the index finger is the x-axis, and the upward direction of the pen barrel is the z-axis, and the direction perpendicular to the two axes is the y-axis, and a three-dimensional rectangular coordinate system is established. At this time, the three fingers give the pen a static friction force f parallel to the pen barrel downward (perpendicular to the paper surface inward, equivalent to the opposite direction of the z-axis) on the basis of F, and the pen can smoothly write 'one' along the x-axis. At this time, the combined force and the combined moment are balanced.

[0005] To maintain these two balances at all times, the writing can be smooth.

[0006] F4 can only meet the moment balance condition when writing along the x-axis. Since F can provide a static friction force f4 in the y-axis direction as needed, the combination of F4 and f4 can meet the moment balance requirement of any stroke on the paper surface. When we write a 'one' along the x-axis, f4 does not appear, and the pen follows the will of the person, and the 'one' is written smoothly. When we want to write a 'one' at an angle, f4 appears, and the pen tip does not move along the direction of Fn, but moves in the direction of the combined force of Fn and f4. This deviation often activates the emergency mechanism of the human body, and the related muscle tissues will highly coordinate, and the vision will be doubled and focused, but the pen tip still does not move along the direction of Fn, which makes people, especially children, puzzled.

[0007] A serious person, the brain will continue to issue instructions to correct Fn force direction, handwriting is still not consistent with the track of the mind, finger muscles and eye periphery muscle in constant adjustment under the very tired and uncomfortable. Over time, the vision of children is easily damaged, become myopia, the number of electronic screen in the eight, nine decades of last century, the student myopia rate is a sharp increase is an example.

[0008] People often say, use hard pen, master the correct pen holding posture is the key, do not know that overcome the interference of static friction f4 and f is more difficult. The size of the static friction in writing constantly, the finger can not feel its existence, more will not think to deal with it. People blindly adopt a variety of pen holding posture writing, in order to reduce the pen does not appear more difficult problems.

[0009] Therefore, the application provides a cylindrical pen which uses a unique way of applying force from the inside of the lever to tap the potential ability of the fingers to hold and write, and a set of opposing forces between the thumb and the tip of the index finger, which completely eliminates the era of writing by means of finger friction, and realizes accurate control of the size of the force applied by the fingers, the size of the force applied by the fingers, and the accurate control of the running track of the pen tip on the paper. SUMMARY

[0010] The application aims to solve the defects in the prior art and provides a cylindrical pen.

[0011] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0012] A cylindrical pen comprises a shell, a support layer fixedly connected in the shell, the support layer being adapted to the index finger structure for covering the index finger, a fixed component provided at the top of the shell for fixing a pen barrel or a pen core.

[0013] Further, the support layer is bonded to the inner wall of the shell, and the surface layer near the index finger is smooth.

[0014] Further, both ends of the shell are open structure, the first opening is near the tip of the index finger, and the second opening is away from the tip of the index finger, the diameter of the first opening is smaller than that of the second opening, the diameter of the first opening is larger than that of the tip of the index finger, and the cross section of the second opening is in the shape of an inverted pear.

[0015] Further, the part of the support layer near the first opening has two inclined surfaces, the inclined surfaces are adapted to the tip of the index finger, and the outer part of the inclined surfaces is adapted to the first knuckle of the thumb.

[0016] Further, the end surface of the support layer away from the shell is provided with a protrusion, and the protrusion is adapted to the middle part of the second knuckle of the index finger.

[0017] Further, the top of the shell is provided with a support seat, the support seat is provided with a support groove, the support groove is matched with the outer diameter of the pen barrel or the pen core, and the support groove is connected with the pen barrel or the pen core through buckling or adhesion.

[0018] Advantages

[0019] Compared with the prior art, the beneficial effects of the present application are that the present application provides a cylindrical pen, which greatly reduces the difficulty of using the pen, and the user can immediately write with correct pen holding posture and correct sitting posture, thereby effectively preventing myopia of students and solving the social problem. Moreover, the present application has the advantages of improving writing quality and speed, and making writing easier. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application, and are used to explain the present application together with the embodiments of the present application, and do not constitute a limitation on the present application.

[0021] Fig. 1 It is an overall structure diagram of the cylindrical pen;

[0022] Fig. 2 It is an internal structure diagram of the cylindrical pen and a force exertion diagram of the thumb and the index finger;

[0023] Fig. 3 It is a force exertion diagram of the index finger and the middle finger.

[0024] In the drawings: 1, support layer; 3, shell; 4, support seat; 5, pen barrel. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] Reference Figs. 1-3The application discloses a cylindrical pen, which comprises a shell 3, a supporting layer 1 fixedly connected in the shell 3, the supporting layer 1 being matched with a forefinger structure and used for covering the forefinger, and two inclined supporting layers being matched with the forefinger tip. The top of the shell 3 is provided with a fixing assembly used for fixing a pen barrel 5 or a pen core. The forefinger can be smoothly controlled to the pen by the supporting layer 1, and the shell 3 is made of a hard material to ensure the strength of the whole structure.

[0028] In other preferred embodiments, the supporting layer 1 is adhered to the inner wall of the shell 3, and the surface layer close to the forefinger is a smooth surface.

[0029] In other preferred embodiments, the shell 3 is of an open structure at both ends, a first opening is close to the forefinger tip, a second opening is away from the forefinger tip, the diameter of the first opening is smaller than that of the second opening, so that the forefinger can enter, the diameter of the first opening is larger than the forefinger tip, the opening is shielded by the two inclined supporting layers, so that the forefinger tip and the thumb end can apply force to each other at the first opening, and the cross section of the second opening is in a hanging pear shape.

[0030] Specifically, the part of the supporting layer 1 close to the first opening has two inclined surfaces matched with the forefinger end, the thumb first knuckle and the back of the forefinger, so that the thumb end and the forefinger tip can smoothly apply force.

[0031] Specifically, the end surface of the supporting layer 1 away from the shell 3 is provided with a protrusion matched with the middle part of the back of the second knuckle of the forefinger, so that the back can apply force.

[0032] In other preferred embodiments, the top of the shell 3 is provided with a supporting seat 4, the supporting seat 4 is provided with a supporting groove, the supporting groove is matched with the outer diameter of the pen barrel 5 or the pen core, and the supporting groove and the pen barrel 5 are connected in a buckle connection mode or an adhesive connection mode.

[0033] Specifically, the forefinger can apply seven elastic forces to the shell in the shell, including an elastic force p1 applied by the forefinger tip, one elastic force applied by the first knuckle, the third knuckle and the back of the second knuckle respectively, and three elastic forces (p5, p6, p7) applied by the side of the forefinger close to the middle finger. The thumb applies an elastic force p8, and the middle finger applies three elastic forces (p9, p10, p11) to the outside of the shell. The forces are collectively referred to as p.

[0034] Because the elastic force is large in quantity and widely distributed, a set of counteracting force P1 is formed in the direction p1 and p8 parallel to the pen, and multiple sets of counteracting force Pn are formed in the plane perpendicular to the pen body. The synthesis of P1 and Pn is equivalent to that the pen can form a balanced force and a balanced moment in any direction in the three-dimensional space. After the force T and t of the paper surface on the pen tip is added, only the corresponding direction p is automatically reduced, but the overall pen still maintains the balance of the resultant force and the balance of the resultant moment. Writing becomes flexible and stable. In particular, the addition of P1 ensures the accuracy and stability of the pressure of the pen tip on the paper surface, which in turn stabilizes the size of the force T and t of the paper surface on the pen tip, so that the stability of writing is improved.

[0035] In hard pen writing, in order to ensure that the friction force f is large enough, the finger needs to exert a force F on the pen barrel which is several times larger than f, which greatly increases the degree of force exerted by the finger and reduces flexibility and stability. The number of elastic forces p of the cylindrical pen is large, so there is no need for friction force. The elastic force P exerted by the finger can be greatly reduced, the finger is relaxed, and writing is more flexible and stable.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacement or change according to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A cylindrical pen, characterized in that, The device includes an outer shell, inside which a support layer is fixedly connected. The support layer is adapted to the structure of the index finger and is used to cover the index finger. A fixing component is provided on the top of the outer shell for fixing the pen barrel or pen refill. The end face of the support layer away from the outer shell is provided with a protrusion, which is adapted to the middle part of the back of the second phalanx of the index finger; Both ends of the outer shell are open structures. The first opening is close to the fingertip of the index finger, and the second opening is far away from the fingertip of the index finger. The diameter of the first opening is smaller than the diameter of the second opening. The diameter of the first opening is larger than the fingertip of the index finger. The cross-section of the second opening is an inverted pear shape. The support layer has two inclined surfaces near the first opening, the inclined surfaces being adapted to the tip of the index finger and the outer surface of the inclined surfaces being adapted to the pad of the first joint of the thumb; The inclined surface is adapted to the fingertip and back of the index finger, and the outer side of the inclined surface is adapted to the fingertip of the first phalanx of the thumb, ensuring the smooth application of force between the thumb tip and the index fingertip; The index finger can apply seven elastic forces to the shell inside the shell, including: an elastic force p1 applied by the fingertip, an elastic force p2 and p3 applied by the pads of the first and third phalanges, a elastic force p4 applied by the back of the second phalange, and three elastic forces p5, p6, and p7 applied by the index finger side near the middle finger; an elastic force p8 applied by the thumb; and three elastic forces p9, p10, and p11 applied by the middle finger on the outside of the shell.

2. A cylindrical pen according to claim 1, characterized in that, The support layer is bonded to the inner wall of the outer shell, and the surface near the index finger is smooth.

3. A cylindrical pen according to claim 1, characterized in that, The top of the outer shell is provided with a support base, and the support base has an opening with a support groove. The support groove is adapted to the outer diameter of the pen barrel or pen refill, and the support groove is connected to the pen barrel or pen refill by a snap fastener or adhesive.

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