Pen with finger pulp groove

Abstract

The utility model discloses a pen with finger pulp grooves, which comprises a pen holder and a pen core, the pen core is fixed at the central position of the pen holder, the central line of the pen core coincides with the central line of the pen holder, the pen holder is provided with three groups of grooves, the grooves can be attached to the finger pulp of a finger when a user holds the pen, and the grooves are annularly distributed at uniform intervals. The finger pulps of the thumb, the forefinger and the middle finger are respectively attached to the finger pulps of the thumb, the forefinger and the middle finger, the pen is a pencil, and the groove of the pen is a combination of a point-shaped groove and a strip-shaped groove. According to the pen with the finger pulp grooves, the contact area between the thumb pulp, the index finger pulp and the middle finger pulp and the pen body can be increased through the three sets of grooves, the pressure intensity borne by the finger pulp in unit area is reduced when the pen holding force of a user is the same, and therefore the pen using time of the user is prolonged, the attaching degree of the contact area between the pen and the hand is improved, and the user experience is improved. In addition, the technical scheme that the groove is formed in the pen holder is adopted, raw materials are simple, the manufacturing process is simple, and the production cost is low.

Description

Technical Field

[0001] The utility model relates to a pen, especially a pen for writing, painting, or both writing and painting. Background Art

[0002] As a common tool, pens are widely used in people's daily lives. The comfort of holding a pen during use can affect the user's working or learning state.

[0003] There are multiple factors affecting the comfort of holding a pen, such as the quality of the pen, the roughness of the outer surface of the pen, the thickness of the pen, and the degree of fit between the pen and the contact surface of the hand. Among them, the better the degree of fit between the pen and the contact surface of the hand, the better the comfort of the user when using the pen.

[0004] In order to improve the degree of fit between the pen and the contact surface of the hand, the following technical means are adopted:

[0005] Replace the material of the contact surface between the pen and the hand, and wrap a soft rubber material cushion at the contact surface between the pen and the hand. However, simply wrapping the material will cause the originally appropriately thick pen shaft to become too thick. Therefore, a part of the shaft at the contact surface between the pen and the hand needs to be removed so that after the rubber material cushion is wrapped around the pen shaft, the thickness of the pen shaft remains appropriate.

[0006] The above technical means will increase the manufacturing cost of the pen and make the manufacturing process complex, resulting in an increase in the unit price of the pen as a daily-use tool and making it difficult to sell.

[0007] Therefore, there is a need to propose a pen that can improve the degree of fit between the pen and the contact surface of the hand through a simple manufacturing process and a low manufacturing cost. Summary of the Invention

[0008] The purpose of the utility model is to construct a pen with finger pulp grooves that has a simple manufacturing process and a low manufacturing cost based on the existing pen and the need to improve the degree of fit between the pen and the contact surface of the hand.

[0009] A pen with finger pulp grooves includes a pen shaft and a pen core. The pen core is fixed at the central position of the pen shaft, and the central axis of the pen core coincides with the central axis of the pen shaft. It is characterized in that the pen shaft is provided with grooves that can fit with the finger pulp of the user when holding the pen.

[0010] Furthermore, there are three groups of the grooves, and the three groups of grooves are respectively in contact with the thumb pulp, index finger pulp, and middle finger pulp when the user holds the pen. The three groups of grooves are annularly distributed with the center line of the refill as the reference and are evenly spaced. The setting of the grooves can increase the contact area between the finger pulp and the pen body. Then, under the condition of unchanged pressure, the pressure per unit area on the finger pulp decreases, making the use more comfortable. The setting of the three groups of grooves can not only correspond to the thumb pulp, index finger pulp, and middle finger pulp when the user holds the pen one by one, but also remind the user to maintain the correct pen-holding posture with the shape of the grooves.

[0011] In actual use, there are many types of pens, including pencils, gel pens, fountain pens, etc. Among them, a pencil is generally composed of a wooden pen barrel and a graphite refill. The manufacturing steps are as follows: in a wooden strip engraved with a refill groove, insert a refill, then splice and bond two wooden strips together, and finally trim the shape of the wooden strip to form a pen barrel with appropriate thickness.

[0012] Furthermore, the above-mentioned pen is a pencil.

[0013] If only strip-shaped grooves are provided, then there are more hollowed parts on the pen barrel, which will cause the strength of the pencil to decrease and it is easy to be broken; if only dot-shaped grooves are provided, then the positioning points for holding the pen barrel are relatively fixed, which will cause the position where the hand holds to be too far or too tight from the tip of the pen when in use.

[0014] Specifically, the grooves on the pencil are preferably a combination of dot-shaped grooves and strip-shaped grooves.

[0015] Furthermore, the pen barrel has two ends, one end is a pointed end, and the other end is a flat end. The refill has two ends, one end is a writing end, and the other end is a terminal end. The terminal end of the refill corresponds to the flat end of the pen barrel, and the terminal end does not exceed the flat end. The writing end of the refill corresponds to the pointed end of the pen barrel, and the writing end during use is located outside the pointed end.

[0016] During the daily use of the refill, it will be subjected to a reaction force generated by the working surface. In order to prevent the refill from shaking or deforming due to the force during use, a fixing part needs to be provided to increase the connection stability of the refill.

[0017] Specifically, the flat end of the pen barrel is provided with a pressing member, and the pressing member presses against the terminal end of the refill.

[0018] Furthermore, the flat end of the pen barrel is flush with the terminal end of the refill.

[0019] Furthermore, each group of the grooves is composed of several individual grooves. Take the midpoints of each groove and connect them, and the straight line where the midpoint connection is located is parallel to the center line of the pencil.

[0020] Furthermore, the patterns of each group of the grooves include combinations of multiple dot-shaped grooves, single or multiple strip-shaped grooves, combinations of dot-shaped grooves and strip-shaped grooves, etc.

[0021] The beneficial effects of the present utility model are as follows: A pen with finger pulp grooves disclosed in this application can increase the contact area between the thumb pulp, index finger pulp, middle finger pulp and the pen body through three groups of grooves. When the user holds the pen with the same force, the pressure received by the finger pulp per unit area is reduced, thereby prolonging the user's writing time, improving the fitting degree of the contact surface between the pen and the hand, enhancing the user's comfort. Moreover, the technical solution of setting grooves on the pen barrel not only has simple raw materials, but also has a simple manufacturing process and low production cost.

[0022] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given, and in conjunction with the drawings, the details are described as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0024] Figure 1 It is a schematic diagram of the overall structure of a specific example of a type I round pencil of the present utility model;

[0025] Figure 2 It is a schematic diagram of the overall structure of a specific example of a type II round pencil of the present utility model;

[0026] Figure 3 It is a schematic diagram of the overall structure of a specific example of a type III round pencil of the present utility model;

[0027] Figure 4 It is a schematic diagram of the overall structure of a specific example of a type IV round pencil of the present utility model;

[0028] Figure 5 It is a schematic diagram of the overall structure of a specific example of a type V round pencil of the present utility model;

[0029] Figure 6 is Figures 1-5 the schematic cross-sectional structure diagram;

[0030] Figure 7It is a schematic diagram of the overall structure of a specific example of a triangular pencil of the present utility model;

[0031] Figure 8 It is a schematic diagram of the overall structure of a specific example of a second-type triangular pencil of the present utility model;

[0032] Figure 9 It is a schematic diagram of the overall structure of a specific example of a third-type triangular pencil of the present utility model;

[0033] Figure 10 It is a schematic diagram of the overall structure of a specific example of a fourth-type triangular pencil of the present utility model;

[0034] Figure 11 It is a schematic diagram of the overall structure of a specific example of a fifth-type triangular pencil of the present utility model;

[0035] Figure 12 is Figures 7-11 a schematic diagram of the cross-sectional structure;

[0036] In the figure: 101, the first-type round pencil; 102, the second-type round pencil; 103, the third-type round pencil; 104, the fourth-type round pencil; 105, the fifth-type round pencil; 106, the first-type triangular pencil; 107, the second-type triangular pencil; 108, the third-type triangular pencil; 109, the fourth-type triangular pencil; 110, the fifth-type triangular pencil; 122, the round pen barrel; 123, the first refill; 125, the triangular pen barrel; 126, the second refill; 131, the first-type groove; 132, the second-type groove; 133, the third-type groove; 134, the fourth-type groove; 135, the fifth-type groove; 136, the first-class groove; 137, the second-class groove; 138, the third-class groove; 139, the fourth-class groove; 140, the fifth-class groove. Detailed implementation manners

[0037] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0038] The pen with a finger belly groove of the present utility model will be further described with reference to the accompanying drawings.

[0039] Such as Figure 1 and Figure 6As shown, in this embodiment, the pen is a type-I round pencil 101. The type-I round pencil 101 includes a round pen barrel 122 and a first refill 123. The cross-section of the round pen barrel 122 is a circle. The first refill 123 is fixed at the central position of the round pen barrel 122, and the central lines of the first refill 123 and the round pen barrel 122 coincide. One end of the round pen barrel 122 is a pointed end, and the other end is a flat end. One end of the first refill 123 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end, which can protect the first refill 123 located in the round pen barrel 122 and reduce the possibility of the first refill 123 being broken due to external force. When using the type-I round pencil 101, the pointed end and the writing end of the pencil will be cut, so that the writing end is located outside the pointed end.

[0040] A pressing member is provided at the flat end of the round pen barrel 122.

[0041] Three groups of type-I grooves 131 are provided on the round pen barrel 122. Each group of type-I grooves 131 is composed of two strip-shaped grooves and a circular groove. The strip-shaped groove and the circular groove in the same group are located in the same plane, and this plane is parallel to the central lines of the round pen barrel 122 and the first refill 123.

[0042] Taking the line formed by connecting the points closest to the central line of the type-I round pencil 101 in a group of type-I grooves 131 as the reference line L, there are three reference lines for the three groups of type-I grooves 131, which are reference line L1, reference line L2, and reference line L3 respectively. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of the reference line L1 is the point Q1, the projection of the reference line L2 is the point Q2, and the projection of the reference line L3 is the point Q3. The projection of the central line of the type-I round pencil 101 is the point P. Connecting the point P and the point Q1, the point P and the point Q2, and the point P and the point Q3, there will be line segments PQ1, PQ2, and PQ3. The included angle between any two line segments is 120°.

[0043] Both ends of the strip-shaped groove are provided with chamfers. The shape and size of the strip-shaped grooves are the same in pairs, and the shape and size of the circular grooves are the same in pairs.

[0044] From the pointed end to the flat end, the first strip-shaped groove, the second strip-shaped groove, and the circular groove are distributed in sequence.

[0045] As Figure 2 and Figure 6As shown, in this embodiment, the pen is a type-II round pencil 102. The type-II round pencil 102 includes a round pen barrel 122 and a first refill 123. The first refill 123 is fixed at the central position of the round pen barrel 122, and the central lines of the first refill 123 and the round pen barrel 122 coincide. One end of the round pen barrel 122 is a pointed end, and the other end is a flat end. One end of the first refill 123 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the first refill 123 located in the round pen barrel 122 and reduce the possibility of the first refill 123 being broken due to external force. When using the type-II round pencil 102, the pointed end and the writing end of the pencil will be cut so that the writing end is located outside the pointed end.

[0046] A pressing member is provided at the flat end of the round pen barrel 122.

[0047] Three groups of type-II grooves 132 are provided on the round pen barrel 122. Each group of type-II grooves 132 consists of a strip-shaped groove and two round grooves. The strip-shaped groove and the round groove in the same group are located in the same plane, and this plane is parallel to the central lines of the round pen barrel 122 and the first refill 123.

[0048] Taking the line formed by connecting the points closest to the central line of the type-II round pencil 102 in a group of type-II grooves 132 as the reference line L, there are three reference lines for the three groups of type-II grooves 132, namely reference line L1, reference line L2, and reference line L3. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, and the projection of reference line L3 is point Q3. The projection of the central line of the type-II round pencil 102 is point P. Connecting point P and point Q1, point P and point Q2, and point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The angle between any two line segments is 120°.

[0049] Chamfers are provided at both ends of the strip-shaped groove. The shape and size of the strip-shaped grooves are the same in pairs, and the shape and size of the round grooves are the same in pairs.

[0050] From the pointed end to the flat end, the strip-shaped groove, the first round groove, and the second round groove are distributed in sequence.

[0051] As Figure 3 and Figure 6As shown, in this embodiment, the pen is a type-three round pencil 103. The type-three round pencil 103 includes a round pen barrel 122 and a first lead 123. The first lead 123 is fixed at the central position of the round pen barrel 122, and the center lines of the first lead 123 and the round pen barrel 122 coincide. One end of the round pen barrel 122 is a pointed end, and the other end is a flat end. One end of the first lead 123 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the first lead 123 located in the round pen barrel 122 and reduce the possibility of the first lead 123 being broken by external force. When using the type-three round pencil 103, the pointed end and the writing end of the pencil will be cut so that the writing end is located outside the pointed end.

[0052] A pressing member is provided at the flat end of the round pen barrel 122.

[0053] Three groups of type-three grooves 133 are provided on the round pen barrel 122. Each group of type-three grooves 133 is composed of a strip-shaped groove and a round groove. The strip-shaped groove and the round groove in the same group are located in the same plane, and this plane is parallel to the center lines of the round pen barrel 122 and the first lead 123.

[0054] Taking the line formed by connecting the points closest to the center line of the type-three round pencil 103 in a group of type-three grooves 133 as the reference line L, there are three reference lines for the three groups of type-three grooves 133, which are reference line L1, reference line L2, and reference line L3 respectively. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, and the projection of reference line L3 is point Q3. The projection of the center line of the type-three round pencil 103 is point P. Connecting point P and point Q1, point P and point Q2, and point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The included angle between any two line segments is 120°.

[0055] Both ends of the strip-shaped groove are provided with chamfers, and the shape and size of the strip-shaped grooves are the same in pairs. The shape and size of the round grooves are the same in pairs.

[0056] From the pointed end to the flat end, the round grooves and the strip-shaped grooves are distributed in sequence.

[0057] Such as Figure 4 and Figure 6As shown, in this embodiment, the pen is a Type-IV round pencil 104. The Type-IV round pencil 104 includes a round pen barrel 122 and a first refill 123. The first refill 123 is fixed at the central position of the round pen barrel 122, and the central lines of the first refill 123 and the round pen barrel 122 coincide. One end of the round pen barrel 122 is a pointed end, and the other end is a flat end. One end of the first refill 123 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the first refill 123 located inside the round pen barrel 122 and reduce the possibility of the first refill 123 being broken due to external force. When using the Type-IV round pencil 104, the pointed end and the writing end of the pencil will be sharpened so that the writing end is located outside the pointed end.

[0058] A pressing member is provided at the flat end of the round pen barrel 122.

[0059] Three groups of Type-IV grooves 134 are provided on the round pen barrel 122. Each group of Type-IV grooves 134 is composed of a strip-shaped groove and a circular groove. The strip-shaped groove and the circular groove in the same group are located in the same plane, and this plane is parallel to the central lines of the round pen barrel 122 and the first refill 123.

[0060] Taking the line formed by connecting the points closest to the central line of the Type-IV round pencil 104 in one group of Type-IV grooves 134 as the reference line L, there are three reference lines for the three groups of Type-IV grooves 134, namely reference line L1, reference line L2, and reference line L3. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, and the projection of reference line L3 is point Q3. The projection of the central line of the Type-IV round pencil 104 is point P. Connecting point P and point Q1, point P and point Q2, and point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The included angle between any two line segments is 120°.

[0061] Chamfers are provided at both ends of the strip-shaped groove. The shape and size of the strip-shaped grooves are the same in pairs, and the shape and size of the circular grooves are the same in pairs.

[0062] From the pointed end to the flat end, the strip-shaped groove and the circular groove are distributed in sequence.

[0063] Such as Figure 5 and Figure 6As shown, in this embodiment, the pen is a type-five round pencil 105. The type-five round pencil 105 includes a round pen barrel 122 and a first refill 123. The first refill 123 is fixed at the central position of the round pen barrel 122, and the central lines of the first refill 123 and the round pen barrel 122 coincide. One end of the round pen barrel 122 is a pointed end, and the other end is a flat end. One end of the first refill 123 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the first refill 123 located in the round pen barrel 122 and reduce the possibility of the first refill 123 being broken due to external force. When using the type-five round pencil 105, the pointed end and the writing end of the pencil will be cut, so that the writing end is located outside the pointed end.

[0064] A pressing member is provided at the flat end of the round pen barrel 122.

[0065] Three groups of type-five grooves 135 are provided on the round pen barrel 122. Each group of type-five grooves 135 is composed of a strip-shaped groove and two round grooves. The strip-shaped groove and the round grooves in the same group are located in the same plane, and this plane is parallel to the central lines of the round pen barrel 122 and the first refill 123.

[0066] Taking the line formed by connecting the points closest to the center line of the type-five round pencil 105 in a group of type-five grooves 135 as the reference line L, there are three reference lines for the three groups of type-five grooves 135, namely reference line L1, reference line L2, and reference line L3. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, and the projection of reference line L3 is point Q3. The projection of the center line of the type-five round pencil 105 is point P. Connecting point P and point Q1, point P and point Q2, and point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The angle between any two line segments is 120°.

[0067] Both ends of the strip-shaped groove are provided with chamfers. The shape and size of the strip-shaped grooves are the same in pairs, and the shape and size of the round grooves are the same in pairs.

[0068] From the pointed end to the flat end, the first round groove, the second round groove, and the strip-shaped groove are distributed in sequence.

[0069] Such as Figure 7 and Figure 12As shown, in this embodiment, the pen is a type-I triangular pencil 106. The type-I triangular pencil 106 includes a triangular pen barrel 125 and a second refill 126. The cross-section of the triangular pen barrel 125 is quasi-triangular. The second refill 126 is fixed at the central position of the triangular pen barrel 125, and the central lines of the second refill 126 and the triangular pen barrel 125 coincide. One end of the triangular pen barrel 125 is a pointed end, and the other end is a flat end. One end of the second refill 126 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the second refill 126 located in the triangular pen barrel 125 and reduce the possibility of the second refill 126 being broken due to external force. When using the type-I triangular pencil 106, the pointed end and the writing end of the pencil will be cut, so that the writing end is located outside the pointed end.

[0070] A pressing member is provided at the flat end of the triangular pen barrel 125.

[0071] Three groups of first-type grooves 136 are provided on the triangular pen barrel 125. Each group of first-type grooves 136 is composed of two strip-shaped grooves and one circular groove. The strip-shaped groove and the circular groove in the same group are located in the same plane, and this plane is parallel to the central lines of the triangular pen barrel 125 and the second refill 126.

[0072] Taking the line formed by connecting the points closest to the central line of the type-I triangular pencil 106 in a group of first-type grooves 136 as the reference line L, there are three reference lines for the three groups of first-type grooves 136, namely reference line L1, reference line L2, and reference line L3. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, and the projection of reference line L3 is point Q3. The projection of the central line of the type-I triangular pencil 106 is point P. Connecting point P and point Q1, point P and point Q2, and point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The included angle between any two line segments is 120°.

[0073] Chamfers are provided at both ends of the strip-shaped groove. The shape and size of the strip-shaped grooves are the same in pairs, and the shape and size of the circular grooves are the same in pairs.

[0074] From the pointed end to the flat end, the first strip-shaped groove, the second strip-shaped groove, and the circular groove are distributed in sequence.

[0075] As Figure 8 and Figure 12As shown, in this embodiment, the pen described is a Type II triangular pencil 107. The Type II triangular pencil 107 includes a triangular pen barrel 125 and a second refill 126. The cross-section of the triangular pen barrel 125 is quasi-triangular. The second refill 126 is fixed at the central position of the triangular pen barrel 125, and the central lines of the second refill 126 and the triangular pen barrel 125 coincide. One end of the triangular pen barrel 125 is a pointed end, and the other end is a flat end. One end of the second refill 126 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the second refill 126 located inside the triangular pen barrel 125 and reduce the possibility of the second refill 126 being broken due to external forces. When using the Type II triangular pencil 107, the pointed end and the writing end of the pencil will be cut so that the writing end is located outside the pointed end.

[0076] A pressing member is provided at the flat end of the triangular pen barrel 125.

[0077] Three groups of second-type grooves 137 are provided on the triangular pen barrel 125. Each group of second-type grooves 137 is composed of a strip-shaped groove and two circular grooves. The strip-shaped groove and the circular grooves in the same group are located in the same plane, and this plane is parallel to the central lines of the triangular pen barrel 125 and the second refill 126.

[0078] Taking the line formed by connecting the points closest to the center line of the Type II triangular pencil 107 in a group of second-type grooves 137 as the reference line L, there are three reference lines for the three groups of second-type grooves 137, namely reference line L1, reference line L2, and reference line L3. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, the projection of reference line L3 is point Q3, and the projection of the center line of the Type II triangular pencil 107 is point P. Connecting point P and point Q1, point P and point Q2, and point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The angle between any two line segments is 120°.

[0079] Chamfers are provided at both ends of the strip-shaped groove. The shape and size of the strip-shaped grooves are the same in pairs, and the shape and size of the circular grooves are the same in pairs.

[0080] From the pointed end to the flat end, the strip-shaped groove, the first circular groove, and the second circular groove are distributed in sequence.

[0081] As Figure 9 and Figure 12As shown, in this embodiment, the pen is a type-three triangular pencil 108. The type-three triangular pencil 108 includes a triangular pen barrel 125 and a second refill 126. The cross-section of the triangular pen barrel 125 is quasi-triangular. The second refill 126 is fixed at the central position of the triangular pen barrel 125, and the central lines of the second refill 126 and the triangular pen barrel 125 coincide. One end of the triangular pen barrel 125 is a pointed end, and the other end is a flat end. One end of the second refill 126 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the second refill 126 located in the triangular pen barrel 125 and reduce the possibility of the second refill 126 being broken by external force. When using the type-three triangular pencil 108, the pointed end and the writing end of the pencil will be cut, so that the writing end is located outside the pointed end.

[0082] A pressing member is provided at the flat end of the triangular pen barrel 125.

[0083] There are three groups of three types of grooves 138 provided on the triangular pen barrel 125. Each group of three types of grooves 138 is composed of a strip-shaped groove and a circular groove. The strip-shaped groove and the circular groove in the same group are located in the same plane, and this plane is parallel to the central lines of the triangular pen barrel 125 and the second refill 126.

[0084] Taking the line formed by connecting the points closest to the central line of the type-three triangular pencil 108 in a group of three types of grooves 138 as the reference line L, there are three reference lines for the three groups of three types of grooves 138, which are reference line L1, reference line L2, and reference line L3 respectively. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of the reference line L1 is the point Q1, the projection of the reference line L2 is the point Q2, and the projection of the reference line L3 is the point Q3. The projection of the central line of the type-three triangular pencil 108 is the point P. Connecting the point P and the point Q1, the point P and the point Q2, and the point P and the point Q3, there will be line segments PQ1, PQ2, and PQ3. The included angle between any two line segments is 120°.

[0085] Both ends of the strip-shaped groove are provided with chamfers, and the shape and size of the strip-shaped grooves are the same in pairs. The shape and size of the circular grooves are the same in pairs.

[0086] From the pointed end to the flat end, the circular grooves and the strip-shaped grooves are distributed in sequence.

[0087] As Figure 10 and Figure 12As shown, in this embodiment, the pen is a four - type triangular pencil 109. The four - type triangular pencil 109 includes a triangular pen barrel 125 and a second refill 126. The cross - section of the triangular pen barrel 125 is quasi - triangular. The second refill 126 is fixed at the central position of the triangular pen barrel 125, and the central lines of the second refill 126 and the triangular pen barrel 125 coincide. One end of the triangular pen barrel 125 is a pointed end, and the other end is a flat end. One end of the second refill 126 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the second refill 126 located inside the triangular pen barrel 125 and reduce the possibility of the second refill 126 being broken due to external force. When using the four - type triangular pencil 109, the pointed end and the writing end of the pencil will be cut, so that the writing end is located outside the pointed end.

[0088] A pressing member is provided at the flat end of the triangular pen barrel 125.

[0089] There are three groups of four - type grooves 139 on the triangular pen barrel 125. Each group of four - type grooves 139 is composed of a strip - shaped groove and a circular groove. The strip - shaped groove and the circular groove in the same group are in the same plane, and this plane is parallel to the central lines of the triangular pen barrel 125 and the second refill 126.

[0090] Taking the line formed by connecting the points closest to the central line of the four - type triangular pencil 109 in a group of four - type grooves 139 as the reference line L, there are three reference lines for the three groups of four - type grooves 139, namely reference line L1, reference line L2, and reference line L3. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, the projection of reference line L3 is point Q3, and the projection of the central line of the four - type triangular pencil 109 is point P. Connecting point P and point Q1, point P and point Q2, point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The included angle between any two line segments is 120°.

[0091] Both ends of the strip - shaped groove are provided with chamfers, and the shape and size of the strip - shaped grooves are the same in pairs. The shape and size of the circular grooves are the same in pairs.

[0092] From the pointed end to the flat end, the strip - shaped grooves and the circular grooves are distributed in sequence.

[0093] Such as Figure 11 and Figure 12As shown, in this embodiment, the pen is a type-five triangular pencil 110. The type-five triangular pencil 110 includes a triangular pen barrel 125 and a second refill 126. The cross-section of the triangular pen barrel 125 is quasi-triangular. The second refill 126 is fixed at the central position of the triangular pen barrel 125, and the central lines of the second refill 126 and the triangular pen barrel 125 coincide. One end of the triangular pen barrel 125 is a pointed end, and the other end is a flat end. One end of the second refill 126 is a writing end, and the other end is a terminal end. The terminal end corresponds to the flat end and is flush with the flat end. The writing end corresponds to the pointed end and is flush with the pointed end. It can protect the second refill 126 located in the triangular pen barrel 125 and reduce the possibility of the second refill 126 being broken due to external force. When using the type-five triangular pencil 110, the pointed end and the writing end of the pencil will be cut, so that the writing end is located outside the pointed end.

[0094] A pressing member is provided at the flat end of the triangular pen barrel 125.

[0095] Three groups of five types of grooves 140 are provided on the triangular pen barrel 125. Each group of five types of grooves 140 is composed of a strip-shaped groove and two circular grooves. The strip-shaped groove and the circular groove in the same group are located in the same plane, and this plane is parallel to the central lines of the triangular pen barrel 125 and the second refill 126.

[0096] Taking the line formed by connecting the points closest to the center line of the type-five triangular pencil 110 in a group of five types of grooves 140 as the reference line L, there are three reference lines for the three groups of five types of grooves 140, namely reference line L1, reference line L2, and reference line L3. Taking the plane perpendicular to L1, L2, and L3 as the projection plane, the projection of reference line L1 is point Q1, the projection of reference line L2 is point Q2, and the projection of reference line L3 is point Q3. The projection of the center line of the type-five triangular pencil 110 is point P. Connecting point P and point Q1, point P and point Q2, and point P and point Q3, there will be line segments PQ1, PQ2, and PQ3. The included angle between any two line segments is 120°.

[0097] Chamfers are provided at both ends of the strip-shaped groove. The shape and size of the strip-shaped grooves are the same in pairs, and the shape and size of the circular grooves are the same in pairs.

[0098] From the pointed end to the flat end, the first circular groove, the second circular groove, and the strip-shaped groove are distributed in sequence.

[0099] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A pen with a finger belly groove, comprising a pen barrel and a refill, wherein the refill is fixed at the central position of the pen barrel, and the central axis of the refill coincides with the central axis of the pen barrel, and is characterized in that, The pen shaft is provided with grooves which can fit with the finger pulp when the user holds the pen. There are three groups of grooves, and the three groups of grooves respectively fit with the thumb pulp, index finger pulp and middle finger pulp when the user holds the pen. The three groups of grooves are annularly distributed with the center line of the pen core as the reference and are evenly spaced; The pen described above is a pencil, and the grooves on the pencil are a combination of dot-shaped grooves and strip-shaped grooves.

2. The pen with a finger pulp groove according to claim 1, wherein The pen shaft has two ends, one end is a pointed end and the other end is a flat end. The pen core has two ends, one end is a writing end and the other end is a terminal end. The terminal end of the pen core corresponds to the flat end of the pen shaft, and the terminal end does not exceed the flat end. The writing end of the pen core corresponds to the pointed end of the pen shaft, and the writing end during use is located outside the pointed end.

3. The pen with a finger pad groove according to claim 2, wherein, The flat end of the pen shaft is provided with a pressing member which presses against the terminal end of the pen core.

4. The pen with a finger pad groove according to claim 3, characterized in that The flat end of the pen shaft is flush with the terminal end of the pen core.

5. The pen with a finger pulp groove according to claim 4, characterized in that, Each group of the grooves is composed of several individual grooves. Take the midpoints of each groove and connect them, and the straight line where the midpoint connection is located is parallel to the center line of the pencil.

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