Elastic writing pen

Abstract

The application discloses a flexible writing pen, which comprises a pen core and a pen shell, the pen core comprises an ink outlet core, an ink storage tube and a connecting seat, the pen shell comprises a pen barrel and a supporting seat, a containing cavity is formed between the pen barrel and the supporting seat, the pen core is arranged in the containing cavity, the connecting seat comprises a supporting column, the supporting column comprises a plurality of column bodies which are connected in an axial direction, according to the different wall thickness, the plurality of column bodies can be divided into at least two parts, the wall thickness of one part of the column bodies is larger than that of the other part of the column bodies, the column bodies which are adjacent in the axial direction are connected through a plate, a plurality of plates which are located between the adjacent column bodies are arranged in an interval along the axial direction of the supporting column, the ink outlet core is arranged on the supporting column and is connected with the ink storage tube through an inner hole of the supporting column, the front end of the supporting seat comprises at least two elastic claw arms, and all the elastic claw arms are arranged in an interval along the circumferential direction of the pen and around the connecting seat. The flexible writing pen can improve the elastic deformation effect of the front end of the pen core.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of elastic writing pen. BACKGROUND

[0002] At present, the existing ball pen, neutral pen, signing pen and the like type pen generally includes pen shell, pen core arranged in pen shell, pen core includes the writing part at the front end, ink storage tube connected to the rear end of writing part, writing part generally includes ink outlet core, connecting seat, ink outlet core and ink storage tube are connected by connecting seat, connecting seat plays the role of supporting ink outlet core and ink delivery. The texture of connecting seat is usually hard, and it is not easy to deform during writing, and it is relatively stiff to write. The pen shell usually includes a cavity for accommodating the pen core, and the front end of the pen shell includes a conical support seat, the front end of the support seat is provided with a through hole for the front end of the connecting seat and the ink outlet core to protrude forward, and the support seat has the effect of supporting and limiting the connecting seat of the pen core.

[0003] Chinese invention patent discloses a kind of elastic pen core (CN201195441Y), including ball, ball seat body, ink tube and the connecting pipe (i.e. connecting seat) of connecting ball seat body and ink tube, the connecting pipe has elasticity, and the connecting pipe can be made of rubber, cowhide and various elastic materials.

[0004] In this way, the pen core is used with the elastic pen shaft, and the pen head ball can deviate from the central axis of the pen core with a certain amplitude and elasticity during writing, the contact friction between the pen head ball and the paper becomes soft, so that the writing feeling is more comfortable, the water is more smooth, the writing fatigue is reduced, and the structure is simple.

[0005] The above-mentioned patent provides a pen core with a connecting seat made of elastic material, which deforms correspondingly based on the writing pressure during writing, and can improve the writing effect of the pen. However, the material of the connecting pipe of the pen core is quite different from that of the traditional connecting pipe, which makes the production process of the pen core more complex and increases the production cost of the pen core.

[0006] In addition, the above-mentioned pen core needs to be installed in the pen shell for use, and the support seat of the traditional pen shell has a great limitation on the deformation of the front end of the pen core, and cannot well reflect the deformation effect of the pen core, especially the small space between the through hole of the front end of the pen shell and the connecting seat, the front end connecting seat of the pen core can only deform within the range of the through hole, which greatly limits the use effect of the above-mentioned pen core. SUMMARY

[0007] The present application provides an elastic writing pen, which has good elasticity at the front end, can deform correspondingly according to the change of writing force, and can improve the writing effect.

[0008] The application discloses a flexible writing pen, which comprises a pen core and a pen shell, the pen core comprises an ink outlet core, an ink storage tube and a connecting seat connected between the ink storage tube and the ink outlet core, the ink outlet core is used for writing by being in contact with a paper surface, the ink storage tube is used for storing ink, the connecting seat is used for supporting the ink outlet core and conveying the ink, the pen shell comprises a pen barrel and a supporting seat connected to the front end of the pen barrel, a cavity is formed between the pen barrel and the supporting seat, the pen barrel is mainly used for holding a hand and accommodating the ink storage tube part of the pen core, and the supporting seat is mainly used for supporting the connecting seat located at the front end of the pen core. The pen core is arranged in the cavity, the connecting seat comprises a supporting column, the supporting column is a hollow tubular structure, the supporting column comprises a plurality of axially connected column bodies, according to different wall thicknesses, the plurality of axially connected column bodies can be divided into at least two parts, the wall thickness of one part of the column bodies is greater than that of the other part of the column bodies, each part of the column bodies comprises at least one column body, the axially adjacent column bodies are connected through flat plate pieces, the periphery edges of the plate pieces are protruding relative to the outer periphery of the supporting column, the plate pieces located between the adjacent column bodies are arranged in an interval distribution mode along the axial direction of the supporting column, the ink outlet core is arranged on the supporting column and is connected with the ink storage tube through the inner hole of the supporting column to form an ink conveying connection, the inner hole can be used as an ink conveying channel and also can be used for installing the ink outlet core, the front end of the supporting seat comprises at least two elastic claw arms arranged in a forward extending mode, all the elastic claw arms are arranged in a circumferential interval distribution mode around the connecting seat and are in lateral supporting cooperation with the connecting seat, a gap is arranged between the circumferentially adjacent two elastic claw arms, so that the circumferentially adjacent two elastic claw arms do not interfere with each other when deforming, and the deformation effect of the elastic claw arms is improved.

[0009] The connecting seat adopts the combined structure of the supporting column and the plurality of plate pieces, is more easily deformed under stress during writing, and has the supporting effect on the ink outlet core during writing. The supporting column is composed of the plurality of axially connected column bodies, the column body with the relatively smaller wall thickness is more easily deformed than the column body with the relatively larger wall thickness under stress during writing, the connecting seat of the pen core is flexible, and can be deformed correspondingly according to the change of the writing force. When the supporting column is deformed and bent to a certain degree, the adjacent plate pieces are in abutting cooperation together, so that the further deformation of the supporting column is limited, and the breakage and damage of the connecting seat or the ink outlet core caused by excessive deformation and bending can be avoided. The connecting seat and the elastic claw arm are in lateral supporting cooperation, the elastic claw arm in supporting cooperation with the connecting seat can also be deformed when the connecting seat is deformed under the writing pressure, the design can improve the deformation effect of the whole front end of the pen, the elastic claw arm has the protection effect on the connecting seat, can prevent the excessive deformation and bending of the connecting seat, and can improve the deformation reset effect of the connecting seat.

[0010] Further, the elastic claw arms are divided into two groups, the two groups of elastic claw arms are arranged along a first radial direction of the axis of the pen, and are arranged in a spaced manner between the two sides corresponding in the circumferential direction, so that the deformation of the two groups of elastic claw arms does not interfere with each other, and the two groups of elastic claw arms have different lengths, and when writing in two different directions along the first radial direction, the two groups of elastic claw arms can provide different support effects for the front end of the refill, and each group of elastic claw arms includes two elastic claw arms with the same length, and the two elastic claw arms of each group of elastic claw arms are arranged along a second radial direction of the axis of the pen, and the first radial direction and the second radial direction are perpendicular, and the same deformation effect can be provided when writing in two different directions along the second radial direction.

[0011] The plate member includes two end portions arranged corresponding to the length direction and two side portions arranged corresponding to the width direction, the support column is connected at the center of the plate member, and the end portions or the side portions of the plurality of plate members are arranged corresponding to the same side of the support column, the width direction of the plate member corresponds to the first radial direction, and the length direction of the plate member corresponds to the second radial direction.

[0012] The coupling seat with the above structure is easier to contact between adjacent plate members due to deformation when writing along the length direction of the corresponding plate member, compared with writing along the width direction of the corresponding plate member, so that the deformation effect of the coupling seat when writing along the length direction of the corresponding plate member is weaker than the deformation effect when writing along the width direction of the corresponding plate member. Through corresponding cooperation with the above pen shell support seat structure, different deformation effects can be produced when the front end of the pen is written in two different directions along the first radial direction, the same deformation effect can be produced when writing in two different directions along the second radial direction, and a writing effect similar to a pen can be produced, so that the lines are more diverse and rich, and are particularly suitable for writing characters.

[0013] Since a traditional pen usually includes a pen point formed by a metal sheet, the metal sheet includes a slit extending to the front end of the pen point, the slit divides the front end of the pen point into two halves, and capillary action is used to guide ink, so that the pen tip normally works. The pen point of the pen has different writing feelings and writing effects when writing in different directions, and the pen point of the pen is relatively soft when writing in the direction corresponding to the front and back of the metal sheet, is easy to deform, and the lines are thicker. When writing in the direction corresponding to the side of the metal sheet, the pen point of the pen is relatively hard, is not easy to deform, and the lines are thinner. Based on the characteristics of the pen, the lines written by the pen are more diverse and rich in posture compared with other types of pens, are particularly suitable for writing characters, and the written characters have the beauty of ups and downs. The refill in the prior art has the same deformation effect when writing in different directions, and cannot produce a writing effect similar to a pen.

[0014] In the present application, the relatively longer set of elastic claw arms has a front end closer to the front end of the refill, which can provide better support effect, and the front end of the pen is less likely to deform when the pen is written in the direction of support force of the set of elastic claw arms. The relatively shorter set of elastic claw arms has a front end farther from the front end of the refill, which provides relatively weak support effect, and the front end of the pen is relatively more likely to deform when the pen is written in the direction of support force of the set of elastic claw arms. This makes the pen of the present application be able to produce a writing effect similar to that of a steel pen when writing, and be able to write lines similar to those written by a steel pen. In addition, the user can clearly observe that the two sets of elastic claw arms are different in length, which facilitates the user to identify the writing direction.

[0015] Further, the pen shell and the refill are provided with positioning structures that form a circumferential positioning fit. The positioning structures make the pen shell and the refill form a circumferential positioning fit, so that the orientations of the pen shell and the refill can be in corresponding positions, avoiding relative rotation between the pen shell and the refill during writing, and making the writing effect of the pen more stable.

[0016] Further, the positioning structure includes an annular convex wall arranged inside the support seat, the annular convex wall includes an inner hole for fitting the refill and an annular end face arranged corresponding to the rear of the pen barrel, the annular convex wall is provided with a positioning sliding groove connected with the inner hole, the positioning sliding groove extends along the axial direction of the pen barrel, the front end of the positioning sliding groove is closed, the annular end face of the annular convex wall is provided with an insertion opening connected with the rear end of the positioning sliding groove, the connecting seat includes a stop ring connected with the rear end of the support column and an insertion part connected with the rear end of the stop ring, the insertion part is inserted with the ink storage tube, the stop ring is limited with the front end of the ink storage tube, and the stop ring is provided with a positioning protrusion inserted with the positioning sliding groove. When the refill is inserted into the pen shell along the axial direction, the positioning protrusion on the refill can be inserted into the positioning sliding groove through the insertion opening, and the positioning protrusion is limited by the inner walls on both sides of the positioning sliding groove, so that the refill is prevented from rotating relative to the pen shell. The positioning structure is simple and convenient to install.

[0017] Further, the annular end face of the annular convex wall is arranged obliquely, and the insertion opening is located at the position closest to the front of the pen shell. The obliquely arranged annular end face can guide the positioning protrusion on the refill to be inserted into the insertion opening when the refill is inserted into the pen shell along the axial direction, facilitating installation.

[0018] Further, the elastic claw arms are arranged obliquely, and the distance between the front end of the elastic claw arm and the axis of the pen is less than the distance between the rear end of the elastic claw arm and the axis of the pen. The front end of the elastic claw arm is close to the connecting seat, which can improve the support effect of the elastic claw arm on the front end of the refill. In addition, the obliquely arranged elastic claw arm can also improve the writing inclination angle of the pen, and the pen is less likely to interfere with the paper during writing.

[0019] Further, according to the axial position and length of the support column where the plate is located, the external contours of the plurality of plates are tapered. The tapered design can improve the support matching effect with the support seat and improve the matching installation effect of the coupling seat and the support seat.

[0020] Further, according to the axial position of the support column where the plate is located, the plurality of plates are divided into front and rear parts, the inner side of the front end of the elastic claw arm is provided with a groove matched with the front part of the plurality of plates, the lengths of the front part plates are the same, and the lengths of the rear part plates are arranged in a decreasing distribution towards the front end of the lead core.

[0021] In another alternative, the lengths of the front part plates and the rear part plates are arranged in a decreasing distribution towards the front end of the lead core, but the decreasing degree of the length of the front part plates is smaller than that of the rear part plates.

[0022] The front part plates are narrower than the rear part plates, which can improve the support matching effect with the elastic claw arm, and also enable the front part of the coupling seat to deform more greatly relative to the rear part, so that the thickness of the writing line can change more obviously when the writing force changes.

[0023] Further, the wall thickness of the column on the two sides of the first radial direction along the axis thereof is smaller than that on the two sides of the second radial direction along the axis, and the first radial direction and the second radial direction are perpendicular to each other. This makes the column more likely to deform when subjected to writing pressure from the first radial direction than when subjected to writing pressure from the second radial direction. This makes the coupling seat deform more when subjected to writing force in the direction corresponding to the first radial direction than when subjected to writing force in the direction corresponding to the second radial direction. This enables the lead core to produce different deformation effects when subjected to writing force in different directions corresponding to the coupling seat, producing a writing effect similar to that of a fountain pen, making the writing lines more diverse and rich, especially suitable for writing characters. And through the support matching with the above two groups of elastic claw arms, the above effect can be further improved.

[0024] Further, the wall thickness of the column of different parts is arranged in a gradually decreasing distribution along the axial direction of the support column. This enables the front part of the support column to deform more greatly relative to the rear part, so that the thickness of the writing line can change more obviously when the writing force changes.

[0025] The beneficial effects of the present application are that the pen of the present application can produce good elastic deformation effect when writing force is applied, the connecting seat is not easy to break and damage during writing, has good writing feeling, can improve the beauty of writing lines, and has lower requirements for the material of the connecting seat, can use the same material and manufacturing process (injection molding process) as the connecting seat of the traditional refill, can reduce the manufacturing cost, the elastic claw arm arranged at the front end of the supporting seat cooperates with the connecting seat at the front end of the refill to support, the refill can drive the elastic claw arm supported and cooperated to produce corresponding deformation when the refill is deformed during writing, the elastic claw arm also gives elastic force to assist the deformation reset of the connecting seat of the refill, can better reflect the elastic deformation effect of the connecting seat of the refill, improve the writing feeling, and make the thickness of the writing lines change obviously with the change of writing force. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a partial structure diagram of the embodiment of the present application;

[0027] Figure 2 is a front view of the embodiment of the present application;

[0028] Figure 3 is a sectional view along Figure 2 A-A line;

[0029] Figure 4 is a partial side view of the embodiment of the present application;

[0030] Figure 5 is a sectional view along Figure 4 B-B line;

[0031] Figure 6 is a sectional view of the pen shell along Figure 4 B-B line of the embodiment of the present application;

[0032] Figure 7 is a partial structure diagram of the refill of the embodiment of the present application;

[0033] Figure 8 is a front view of the refill of the embodiment of the present application;

[0034] Figure 9 is a top view of the refill of the embodiment of the present application;

[0035] Figure 10 is a top view of the embodiment of the present application;

[0036] Figure 11 is a partial structure diagram of the refill of another embodiment of the present application;

[0037] Figure 12A sectional view of a refill according to another embodiment of the present application. DETAILED DESCRIPTION

[0038] An embodiment of the elastic writing pen according to the present application is shown in the drawings. Figures 1-10 As shown, the specific structure comprises a refill and a pen shell. The refill comprises an ink outlet core 11, an ink storage tube 12, and a connecting seat 13 connected between the ink storage tube 12 and the ink outlet core 11. The ink outlet core 11 is used for writing by cooperating with a paper surface. The ink storage tube 12 is used for storing ink. The connecting seat 13 serves to support the ink outlet core 11 and deliver ink. The pen shell comprises a pen barrel 21 and a support seat 22 connected to the front end of the pen barrel 21. A cavity 23 is formed between the pen barrel 21 and the support seat 22. The pen barrel 21 is mainly used for holding by a hand and accommodating the ink storage tube 12 of the refill. The support seat 22 is mainly used for cooperating with the connecting seat 13 at the front end of the refill to provide support. The refill is arranged in the cavity 23. The connecting seat 13 comprises a support column 131. The support column 131 is a hollow tubular structure. The support column 131 comprises a plurality of axially connected column bodies 1311. According to different wall thicknesses, the plurality of axially connected column bodies 1311 can be divided into at least two parts. Each part of the column bodies 1311 comprises at least one column body 1311. The wall thickness of one part of the column bodies 1311 is greater than that of another part of the column bodies 1311. The support column 131 has a supporting effect on the ink outlet core 11 during writing. The support column 131 composed of the plurality of axially connected column bodies 1311 is more likely to deform when subjected to a writing force in a direction with a relatively small wall thickness than in a direction with a relatively large wall thickness. The connecting seat 13 of the refill has a certain writing elasticity and can deform correspondingly according to changes in writing force.

[0039] The wall thickness of the column bodies 1311 on both sides of a first radial direction along the axis of the pen is smaller than that on both sides of a second radial direction along the axis. The first radial direction and the second radial direction are perpendicular to each other. This makes the column bodies 1311 more likely to deform when subjected to a writing force in the first radial direction than in the second radial direction. This makes the connecting seat 13 have a weaker deformation effect when subjected to a writing force in the first radial direction than in the second radial direction. The refill can produce different deformation effects when subjected to a writing force in different directions corresponding to the connecting seat 13, can produce a writing effect similar to a fountain pen, and can make the lines more diverse and rich, especially suitable for writing characters. The outer contour of the column bodies 1311 is preferably elliptical. The two ends of the elliptical shape correspond to the second radial direction. The inner hole contour of the column bodies 1311 is circular.

[0040] The wall thickness of the different parts of the column body 1311 is arranged in a distribution that gradually decreases along the axial direction of the support column 131. This enables the front part of the support column 131 to deform to a greater extent relative to the rear part, so that the thickness of the writing line can change more obviously when the writing force changes. In other embodiments, the column body 1311 with a relatively small thickness can also be arranged in a distribution at the rear or middle part of the support column 131, and the column body 1311 with a relatively large thickness can be arranged in a distribution in front of or on both sides of the column body 1311 with a relatively small thickness, so that the specific part of the support column 131 is more likely to deform when writing.

[0041] The column bodies 1311 that are axially adjacent are connected by flat plate members 132, the edges of the plate members 132 are arranged in a convex manner relative to the outer circumferential surface of the support column 131, and a plurality of plate members arranged in a distribution in the axial direction of the support column 131 between the adjacent column bodies 1311. The ink outlet core 11 is arranged on the support column 131 and establishes an ink conveying connection with the ink storage tube 12 through the inner hole of the support column 131, which can serve as an ink conveying channel and can also be used for the installation of the ink outlet core 11. The front end of the support seat 22 includes at least two elastic claw arms 221 arranged in a forward extending manner, and all the elastic claw arms 221 are arranged in a circumferential distribution around the coupling seat 13 and form a lateral support cooperation with the coupling seat 13. A gap 222 is provided between two circumferentially adjacent elastic claw arms 221, so that the two circumferentially adjacent elastic claw arms 221 do not interfere with each other when deformed, improving the deformation effect of the elastic claw arms 221.

[0042] The coupling seat 13 adopts the structure of the support column 131 and a plurality of plate members 132, which is more likely to deform under stress during writing. The gaps between the plurality of plate members 132 arranged in a distribution can improve the deformation effect of the coupling seat 13, improve the feel during writing, and when the coupling seat 13 is deformed and bent to a certain extent, the adjacent plate members 132 will abut and cooperate together, thereby limiting the further deformation of the coupling seat 13, which can avoid the breakage and damage of the coupling seat 13 or the ink outlet core 11 caused by excessive deformation and bending. The coupling seat 13 and the elastic claw arm 221 form a lateral support cooperation, and when the coupling seat 13 deforms under the writing pressure, the elastic claw arm 221 that supports the coupling seat 13 can also deform. This design can improve the deformation effect of the whole front end of the pen, the elastic claw arm 221 has a protective effect on the coupling seat 13, which can prevent the coupling seat 13 from deforming and bending excessively, and can also improve the deformation reset effect of the coupling seat 13.

[0043] As Figures 3 to 6 and Figure 10As shown, the elastic claw arms 221 are four, and are divided into two groups, each group of elastic claw arms 221 includes two elastic claw arms 221, two groups of elastic claw arms (221a, 221b) are arranged along the first radial direction of the axis of the pen, two groups of elastic claw arms (221a, 221b) are arranged in a spaced manner between the two sides corresponding in the circumferential direction, that is, two groups of elastic claw arms (221a, 221b) also have a gap 222 between the two sides corresponding in the circumferential direction, so that the deformation of the two groups of elastic claw arms 221 does not interfere with each other, the two groups of elastic claw arms 221 have different lengths, the elastic claw arm with the mark 221a is longer than the elastic claw arm with the mark 221b, the front end of the elastic claw arm 221a is more protruding forward than the front end of the elastic claw arm 221b, when the pen is written in two different directions along the first radial direction, based on the different lengths of the elastic claw arms 221, two groups of elastic claw arms (221a, 221b) can provide different support effects for the front end of the cartridge. Each group of two elastic claw arms 221 includes two elastic claw arms of the same length, and the two elastic claw arms of the two groups of elastic claw arms are arranged along the second radial direction of the axis of the pen, the first radial direction and the second radial direction are perpendicular, and the same deformation effect can be provided when writing in two different directions along the second radial direction.

[0044] The plate member 132 includes two end portions arranged in the length direction and two side portions arranged in the width direction, the support column 131 is connected at the center of the plate member 132, and the end portions 1321 or the side portions 1322 of the plurality of plate members 132 are arranged on the same side of the support column 131, the width direction of the plate member 132 corresponds to the first radial direction, and the length direction of the plate member 132 corresponds to the second radial direction.

[0045] The coupling seat 13 with the above structure is more likely to contact between adjacent plate members 132 due to deformation when writing in the length direction of the plate member 132, which makes the deformation effect of the coupling seat 13 when writing in the length direction of the plate member 132 weaker than the deformation effect when writing in the width direction of the plate member 132. Through the corresponding cooperation with the above pen shell support seat 22 structure, the front end of the pen can produce different deformation effects when writing in two different directions corresponding to the first radial direction, and can produce the same deformation effect when writing in two different directions corresponding to the second radial direction, which can produce a writing effect similar to a pen, making the lines more diverse and rich, especially suitable for writing characters.

[0046] The relatively long set of elastic claw arms 221a has a front end closer to the front end of the refill, and can provide better support effect. When the pen is written in the direction of the support force of the set of elastic claw arms 221a, the front end of the set of elastic claw arms 221a is relatively difficult to deform. The relatively short set of elastic claw arms 221b has a front end farther from the front end of the refill, and provides relatively weak support effect. When the pen is written in the direction of the support force of the set of elastic claw arms 221b, the front end of the set of elastic claw arms 221b is relatively easy to deform. This makes the pen of the present application have a writing effect similar to that of a steel pen, and can write lines similar to those written by a steel pen. In addition, the user can clearly observe that the two sets of elastic claw arms 221 have different lengths, which facilitates the user to identify the writing direction.

[0047] The pen shell and the refill are provided with positioning structures that form a circumferential positioning fit. The positioning structures make the pen shell and the refill form a circumferential positioning fit, so that the orientations of the pen shell and the refill can be in corresponding positions, avoiding relative rotation between the pen shell and the refill during writing, and making the writing effect of the pen more stable.

[0048] The positioning structure includes an annular convex wall 211 integrally formed on the inner side of the support seat 22. The annular convex wall 211 includes an inner hole 212 that is fitted with the refill, and an annular end face 213 provided at the rear of the pen barrel 21. The annular convex wall 211 is provided with a positioning sliding groove 214 connected with the inner hole. The positioning sliding groove 214 extends along the axial direction of the pen barrel 21, and the front end of the positioning sliding groove 214 is closed. The annular end face 213 of the annular convex wall 211 is provided with an insertion opening connected with the rear end of the positioning sliding groove 214. The coupling seat 13 includes a stop ring 133 connected with the rear end of the support column 131, and an insertion part 134 connected with the rear end of the stop ring 133. The insertion part 134 is fitted with the ink storage tube 12. The stop ring 133 is limited with the front end of the ink storage tube 12. The stop ring 133 is provided with a positioning protrusion 1331 fitted with the positioning sliding groove 214. When the refill is inserted into the pen shell along the axial direction, the positioning protrusion 1331 on the refill can be inserted into the positioning sliding groove 214 through the insertion opening. The positioning sliding groove 214 is limited with the positioning protrusion 1331 through the inner walls on both sides of the positioning sliding groove 214, to prevent the refill from rotating relative to the pen shell. The positioning structure is simple and easy to install.

[0049] The annular end face 213 of the annular convex wall 211 is inclined. The insertion opening is located at the position closest to the front of the pen shell. When the refill is inserted into the pen shell along the axial direction, the annular end face 213 can guide the positioning protrusion 1331 on the refill to be inserted into the insertion opening, facilitating installation.

[0050] The elastic claw arm 221 is arranged in an inclined manner, the distance between the front end of the elastic claw arm 221 and the axis of the pen is smaller than the distance between the rear end of the elastic claw arm 221 and the axis of the pen. The front end of the elastic claw arm 221 is close to the connecting seat 13, which can improve the supporting effect of the elastic claw arm 221 on the front end of the pen core. In addition, the inclined arrangement of the elastic claw arm 221 can also improve the writing inclination angle of the pen, and the pen is not easy to interfere with the paper during writing.

[0051] As shown in Figures 7 to 10 , according to the axial position and length of the support column 131 where the plate member 132 is located, the external contours of the plurality of plate members 132 are designed in a tapered structure. The design of the tapered structure can improve the supporting effect of the support seat 22, and improve the installation effect of the connecting seat 13 and the support seat 22. The end 1321 of the plate member 132 has an arc-shaped end face, and the end face of the plate member 132 has a taper.

[0052] According to the axial position of the support column 131 where the plate member 132 is located, the plurality of plate members 132 are divided into front parts 132a and rear parts 132b, the front end of the elastic claw arm 221 is provided with a groove 2211 in contact with the front parts 132a of the plurality of plate members 132, the lengths of the front parts 132a are the same, and the lengths of the rear parts 132b are arranged in a decreasing distribution towards the front end of the pen core.

[0053] In other embodiments, the lengths of the front parts 132a and the rear parts 132b can also be arranged in a decreasing distribution towards the front end of the pen core, but the decreasing degree of the length of the front parts 132a is smaller than the decreasing degree of the length of the rear parts 132b.

[0054] The front parts 132a are narrower than the rear parts 132b, which can improve the supporting effect of the elastic claw arm 221, and also enable the front part of the connecting seat 13 to deform more greatly relative to the rear part, so that the thickness of the writing line can change more obviously when the writing force changes.

[0055] By using the above scheme, the front part of the connecting seat 13 can deform more greatly relative to the rear part, so that the thickness of the writing line can change more obviously when the writing force changes.

[0056] In this embodiment, as shown in Figure 3 , 5As shown, the ink outlet core 11 is a microporous core made of plastic material, the front end of the microporous core extends forward from the front end of the connecting seat 13 and is used to cooperate with the paper surface to write, the rear end of the connecting seat 13 is provided with a rear plug-in hole 135, the ink storage tube 12 is provided with an ink delivery core 14, the front end of the ink delivery core 14 is inserted into the rear plug-in hole 135, the rear end of the microporous core is inserted into the rear plug-in hole 135 and is plugged and cooperated with the ink delivery core 14, the microporous core made of plastic material has a certain elasticity, and can also deform together with the connecting seat 13 when writing is stressed, so that the deformation effect of the front end of the pen core can be improved.

[0057] In another embodiment of the present application, the pen core structure is as shown in Figure 11 、 12 As shown, the front end of the connecting seat 13 is provided with a front plug-in hole 136, the ink outlet core 11 includes a ball 111 and a mounting seat 112, the mounting seat 112 is plugged and fixed in the front plug-in hole 136, and the ball 111 is rollingly arranged on the mounting seat 112. In order to ensure the reliable operation of the ball, the mounting seat 112 is usually made of hard metal material and is plugged and fixed at the front end of the connecting seat 13, so as not to easily affect the deformation of the connecting seat 13. The mounting seat 112 includes an ink delivery channel connected with the inner hole of the supporting column 131, the rear end of the inner hole of the supporting column 131 is connected with the ink storage tube 12, and when writing, the ink in the ink storage tube 12 is sequentially delivered to the ball 111 through the inner hole of the supporting column 131 and the ink delivery channel of the mounting seat 112. The ball 111 is rollingly arranged on the mounting seat 112 and can roll during writing, thereby outputting the ink to the paper surface to form a writing trace.

[0058] In addition, in another embodiment of the present application, a supporting rib 137 is arranged between the end portions of the plurality of adjacent plate members 132 located at the rear of the supporting column 131, and the supporting rib 137 is arranged in the gap between the adjacent plate members 132. The arrangement of the supporting rib 137 can limit the deformation of the plurality of plate members 132 at the corresponding position to move closer when writing is stressed, weaken the deformation effect of the rear part of the connecting seat 13 in the length direction of the corresponding plate member 132, and improve the writing feeling.

[0059] The above embodiments are only one of the preferred specific embodiments of the present application, and the usual changes and replacements made by those skilled in the art within the scope of the technical solutions of the present application are also included in the protection scope of the present application.

Claims

1. A flexible writing pen, comprising a pen refill and a pen casing, the pen refill including an ink core, an ink reservoir, and a connecting seat connecting the ink reservoir and the ink core, the pen casing including a pen barrel and a support seat connected to the front end of the pen barrel, a cavity being formed between the pen barrel and the support seat, the pen refill being disposed in the cavity, characterized in that: The coupling seat comprises a support column which is a hollow tubular structure, the support column comprises a plurality of axially connected column bodies, according to the different wall thickness, the plurality of axially connected column bodies can be divided into at least two parts, one part of the column bodies has a larger wall thickness than the other part of the column bodies, the axially adjacent column bodies are connected by flat plate members, the four peripheral edges of the plate members are protruding relative to the outer peripheral surface of the support column, a plurality of plate members located between adjacent column bodies are arranged in an axially spaced manner along the support column, the ink outlet core is arranged on the support column and establishes an ink conveying connection with the ink storage tube through the inner hole of the support column, the front end of the support seat comprises at least two forwardly extending elastic claw arms, all the elastic claw arms are arranged in a circumferentially spaced manner around the coupling seat and form a lateral support with the coupling seat.

2. The elastomeric writing instrument of claim 1, wherein: The elastic claw arms are divided into two groups, the two groups of elastic claw arms are arranged in a first radial direction of the pen axis, the two groups of elastic claw arms have different lengths, each group of elastic claw arms comprises two elastic claw arms with the same length, the two elastic claw arms of each group of elastic claw arms are arranged in a second radial direction of the pen axis, the first radial direction and the second radial direction are perpendicular, the plate member comprises two end portions arranged in a corresponding length direction and two side portions arranged in a corresponding width direction, the support column is connected at the center of the plate member, the end portions or the side portions of the plurality of plate members are arranged on the same side of the support column, the width direction of the plate member corresponds to the first radial direction, and the length direction of the plate member corresponds to the second radial direction.

3. The elastomeric writing instrument of claim 2, wherein: The pen shell and the pen core are provided with a positioning structure for forming a circumferential positioning cooperation.

4. The elastomeric writing instrument of claim 3, wherein: The positioning structure comprises an annular convex wall arranged on the inner side of the support seat, the annular convex wall comprises an inner hole for cooperating with the pen core, an annular end face arranged corresponding to the rear of the pen barrel, a positioning sliding groove connected with the inner hole is formed in the annular convex wall, the positioning sliding groove is arranged in an axially extending manner along the pen barrel, the front end of the positioning sliding groove is closed, an insertion opening connected with the rear end of the positioning sliding groove is arranged on the annular end face of the annular convex wall, the coupling seat comprises a stop ring connected to the rear end of the support column and a plug-in portion connected to the rear end of the stop ring, the plug-in portion is plugged with the ink storage tube, the stop ring is limited with the front end of the ink storage tube, and a positioning protrusion plugged with the positioning sliding groove is arranged on the stop ring.

5. The elastomeric writing instrument of claim 4, wherein: The annular end face of the annular convex wall is arranged in an inclined manner, and the insertion opening is located at the position closest to the front of the pen shell.

6. The elastomeric writing instrument of claim 1, wherein: The elastic claw arms are arranged in an inclined manner, the distance between the front end of the elastic claw arm and the axis of the pen is smaller than the distance between the rear end of the elastic claw arm and the axis of the pen.

7. The elastomeric writing instrument of claim 6, wherein: According to the axial position and the length of the plate member on the support column, the external contour of the plurality of plate members cooperates in a tapered structure.

8. The elastomeric writing instrument of claim 7, wherein: According to the axial position of the support column where the plate is located, the plurality of plates is divided into a front part and a rear part, the inner side of the front end of the elastic claw arm is provided with a groove in contact with the front part of the plurality of plates, the lengths of the front part plates are the same, and the lengths of the rear part plates are arranged in a decreasing distribution towards the front end of the lead core; or the lengths of the front part plates and the rear part plates are both arranged in a decreasing distribution towards the front end of the lead core, but the decreasing degree of the length of the front part plates is smaller than that of the length of the rear part plates.

9. The elastic writing pen according to claim 1 or 2, characterized by: The wall thickness of the column on both sides of a first radial direction along the axis of the pen is smaller than that on both sides of a second radial direction along the axis of the pen, and the first radial direction and the second radial direction are perpendicular to each other.

10. The elastomeric writing instrument of claim 9, wherein: The wall thickness of the column of different parts is arranged in a decreasing distribution along the axial direction of the support column.

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