Direct liquid type pen

Abstract

The utility model discloses a direct liquid type pen which comprises a pen holder, a water storage device, a sharp sleeve, a pen point and a water guide core, wherein an ink storage cavity is formed in the pen holder, one end of the pen holder is open, the water storage device is arranged in the open end of the pen holder, the sharp sleeve is installed at the open end of the pen holder and presses the water storage device, the pen point is fixedly inserted into the sharp sleeve, and the water guide core is used for guiding ink. A center hole penetrating through the two ends of the ink storage device is formed in the middle of the ink storage device, the ink guide core is inserted into the center hole, the lower end of the ink guide core elastically abuts against the pen point, and the upper end extends into the ink storage cavity. A plurality of convex ribs which are distributed at intervals in the circumferential direction are arranged on the inner wall, located in the center hole, of the water storage device, extend in the axis direction of the center hole and are in interference fit with the water diversion core. According to the utility model, the convex ribs are utilized to increase the fit interference with the ink refill, and the convex ribs extrude and clamp the ink refill, so that the ink refill is not easy to slide upwards, the reliable contact between the pen point and the ink refill is ensured, the ink refill can be conveniently assembled, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pen technical field, especially a direct liquid type pen. BACKGROUND

[0002] The direct liquid type pen generally comprises a pen barrel, a pen head, a water reservoir and a water guide core, the water guide core is installed in the water reservoir and is connected with the pen head, in the writing or drawing process, the ink in the pen head is consumed, the water guide core absorbs the ink from the ink storage cavity through the capillary action and replenishes the pen head, and the water reservoir balances the air pressure in the pen barrel with the outside environment, so that the ink can flow out smoothly.

[0003] At present, the assembly mode of the water guide core and the water reservoir of the existing direct liquid type pen generally has the following two kinds: one is to directly assemble the water guide core and the water reservoir with interference, the interference amount of this mode is difficult to control, if the interference amount is too large, it will lead to difficult installation, even cannot be installed, if the interference amount is too small, the water guide core is prone to axial displacement, leading to unreliable contact with the pen head, and the ink breakage phenomenon is prone to occur during writing, and in order to control the interference amount, more complex production process and more strict quality detection may be needed, thereby increasing the production cost; the other is to reduce the hole diameter of the upper section of the inner hole of the water reservoir, so as to form a step, and correspondingly reduce the diameter of the upper section of the water guide core, so as to also form a step, so as to cooperate with the inner hole step of the water reservoir, this mode can effectively prevent the axial displacement of the water guide core, but will lead to complex production process of the water guide core, also will increase the production cost, and since the diameter of the upper section of the water guide core is smaller than that of the lower section, during assembly, the upper section of the water guide core is difficult to align with the upper section of the inner hole of the water reservoir, and the assembly difficulty is large. Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems, the utility model provides a direct liquid type pen, which can ensure that the water guide core will not displace axially, ensure that the pen head and the water guide core are in reliable contact, facilitate the assembly of the water guide core and reduce the production cost.

[0005] The utility model discloses a direct liquid type pen, which comprises a pen barrel with an ink storage cavity in the interior and an open end, a water storage device built in the open end of the pen barrel, a tip sleeve installed on the open end of the pen barrel and pressing the water storage device, a pen head fixedly inserted into the tip sleeve, and a water guide core for guiding ink, wherein the water storage device is provided with a central hole penetrating through both ends thereof in the middle part, the water guide core is inserted into the central hole, and the lower end of the water guide core elastically abuts against the pen head and the upper end extends into the ink storage cavity; the water storage device is provided with a plurality of convex ribs on the inner wall of the central hole, which are spaced apart in the circumferential direction, the plurality of convex ribs extend along the axis direction of the central hole, and the plurality of convex ribs are in interference fit with the water guide core.

[0006] As a further improvement of the utility model, the lower end of each of the plurality of convex ribs is provided with an edge, which is used for clamping the water guide core when interference fit.

[0007] As a further improvement of the utility model, the upper end of each of the plurality of convex ribs extends to the upper end surface of the water storage device, and the lower end of each of the plurality of convex ribs extends to the middle part of the central hole.

[0008] As a further improvement of the utility model, the thickness of each of the plurality of convex ribs along the radial direction of the central hole is 0.1mm-0.8mm, and the length of each of the plurality of convex ribs along the axial direction of the central hole is 1mm-20mm.

[0009] As a further improvement of the utility model, the number of the convex ribs is 2-20.

[0010] As a further improvement of the utility model, the inner diameter of the central hole gradually decreases from the lower end to the upper end, and the diameter of the water guide core is between the inner diameter of the lower end and the inner diameter of the upper end of the central hole.

[0011] As a further improvement of the utility model, the upper and lower ends of the water guide core are both provided with a conical shape and are symmetrically distributed.

[0012] As a further improvement of the utility model, a stirring bead freely movable is installed in the ink storage cavity.

[0013] As a further improvement of the utility model, the upper end of the water storage device is provided with two stop platforms spaced apart, the distance between the two stop platforms is smaller than the diameter of the stirring bead, the upper end of the water guide core is between the two stop platforms, and the top of the water guide core is lower than the top surface of the two stop platforms.

[0014] As a further improvement of the utility model, the sharp sleeve is internally provided with a jack, the jack is provided with a plurality of buckles along the peripheral wall, the outer peripheral surface of the pen head is provided with an annular groove, and the pen head is inserted into the jack and the plurality of buckles are all clamped in the annular groove.

[0015] The utility model discloses a direct liquid type pen, a plurality of convex ribs are arranged on the inner wall of the central hole of the water storage device and are spaced apart in the circumferential direction, when the water guide core is assembled, the plurality of convex ribs are used to increase the interference amount of cooperation with the water guide core, the plurality of convex ribs extruding the water guide core can increase the friction, and the convex rib can also be clamped into the water guide core, so that the water guide core is not easy to slide upward, the pen head and the water guide core can be reliably contacted, the original structure of the water guide core does not need to be changed, the production process of the water guide core is not increased, the water guide core can be conveniently assembled, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the direct liquid type pen of the utility model;

[0017] Figure 2 It is a sectional view of the utility model along Figure 1 A-A direction;

[0018] Figure 3 It is an explosion view of the direct liquid type pen of the utility model;

[0019] Figure 4 It is an enlarged view of B part in the utility model; Figure 2

[0020] Figure 5 It is a perspective view of the water storage device in the utility model;

[0021] Figure 6 It is an enlarged view of C part in the utility model. Figure 2

[0022] The following description is made in connection with the accompanying drawings:

[0023] 1, pen barrel;101, ink storage cavity;2, water storage device;201, central hole;202, convex rib;2021, corner;203, stop table;204, back gas groove;3, sharp sleeve;301, buckle;4, pen head;401, annular groove;5, water guide core;6, stirring bead;7, pen cap. DETAILED DESCRIPTION

[0024] The preferred embodiment of the utility model is described in detail in connection with the accompanying drawings.

[0025] Referring to Figures 1 to 6 , the utility model provides a direct liquid type pen, which comprises a pen barrel 1, a water storage device 2, a sharp sleeve 3, a pen head 4, a water guide core 5 and a pen cap 7.​​

[0026] The pen barrel 1 can be a cylindrical shape with a closed upper end and an open lower end, and the hollow interior of the pen barrel 1 serves as an ink storage chamber 101 for storing powdered ink. The inner wall of the water reservoir 2 is provided with a stop step at a position a certain length away from the open end, the water reservoir 2 is built into the open end of the pen barrel 1, and the upper end of the water reservoir 2 abuts against the stop step. The nib sleeve 3 is installed in an interference fit at the open end of the pen barrel 1 and presses the water reservoir 2. The pen point 4 is fixedly inserted into the nib sleeve 3, and the cap 7 is fitted on the pen barrel 1 and seals the pen point 4 in cooperation with the nib sleeve 3 to prevent the ink from evaporating and drying out.

[0027] Further, the water reservoir 2 is provided with a central hole 201 extending through the upper and lower ends thereof, and the water guide core 5 is inserted into the central hole 201 and elastically abuts against the pen point 4 at the lower end and extends into the ink storage chamber 101 at the upper end, for guiding the ink in the ink storage chamber 101 to the pen point 4 by capillary action.

[0028] As one of the important improvements of the present application, the inner wall of the water reservoir 2 at the central hole 201 is provided with a plurality of convex ribs 202 spaced apart in the circumferential direction, the plurality of convex ribs 202 all extend along the axis direction of the central hole 201, and the plurality of convex ribs 202 all interfere with the water guide core 5.

[0029] During assembly, the water guide core 5 is clamped by an external mechanical device and is pushed into the central hole 201 of the water reservoir 2, after assembly, the plurality of convex ribs 202 on the inner wall of the central hole 201 are used to increase the interference fit with the water guide core 5, the plurality of convex ribs 202 extruding the water guide core 5 will increase the friction, at the same time, the convex ribs 202 will be clamped into the water guide core 5, so that the water guide core 5 is not easy to slide upward, ensuring reliable contact between the pen point 4 and the water guide core 5, without changing the original structure of the water guide core 5, without increasing the production process of the water guide core 5, facilitating the assembly of the water guide core 5, and reducing the production cost.

[0030] In the present application, the water guide core 5 can be made of polyester fiber, acrylic fiber or POM microporous plastic, and the pen point 4 can be made of nylon fiber, polyester fiber, acrylic fiber or PE sintered material. In the present embodiment, the water guide core 5 is specifically made of polyester fiber, and the pen point 4 is specifically made of nylon fiber, and the water guide core 5 and the pen point 4 elastically abut against each other.

[0031] Referring to Figure 2 and Figure 3The upper ends of the multiple ribs 202 extend to be flush with the upper end surface of the water reservoir 2, and the lower ends of the multiple ribs 202 extend to the middle of the center hole 201, and the lower ends of the multiple ribs 202 are all provided with sharp corners 2021. The sharp corners 2021 in this embodiment are all right angles. The sharp corners 2021 are used to get into the fibers of the water guide core 5 during interference fit, which can more effectively prevent the water guide core 5 from moving upward, so that the contact between the pen tip 4 and the water guide core 5 is more guaranteed.

[0032] In the present invention, the thickness of the plurality of ribs 202 along the radial direction of the center hole 201 is 0.1 mm to 0.8 mm, the length of the plurality of ribs 202 along the axial direction of the center hole 201 is 1 mm to 20 mm, and the width of the plurality of ribs 202 is 0.1 mm to 0.8 mm. Preferably, in this embodiment, the length, width, and thickness of the ribs 202 are 7 mm, 0.25 mm, and 0.25 mm, respectively.

[0033] In the present invention, the number of ribs 202 is 2-20. Figure 5 As shown, in this embodiment, there are three ribs 202. The water reservoir 2 is provided with an air return groove 204. The three ribs 202 are all positioned away from the air return groove 204 of the water reservoir 2, thereby minimizing the impact on the air return groove 204 during injection molding. Furthermore, the ribs 202 can also be arranged in equal parts or in other arrangements.

[0034] In the present invention, the inner diameter of the center hole 201 gradually decreases from bottom to top, and the diameter of the water diversion core 5 is between the lower and upper inner diameters of the center hole 201. Preferably, in this embodiment, the inner diameter of the lower edge of the center hole 201 is 2.2 mm, the inner diameter of the upper edge is 1.92 mm, and the diameter of the water diversion core 5 is 2 mm. This structural design not only facilitates demolding of the water reservoir 2 during the injection molding process, but also facilitates inserting the water diversion core 5 from bottom to top into the center hole 201, facilitating installation. It also creates an interference fit between the upper half of the center hole 201 and the water diversion core 5.

[0035] In a preferred embodiment of the present invention, the upper and lower ends of the water-guiding core 5 are both set to a conical shape and are symmetrically distributed. By setting the two ends of the water-guiding core 5 to the same structure, there is no need to distinguish the direction when assembling the water-guiding core 5, which is more convenient to assemble. At the same time, the use of a conical end is likely to produce more elastic deformation, which can reduce the assembly accuracy requirements of the water-guiding core 5, ensuring that the water-guiding core 5 can reliably elastically abut against the pen tip 4, thereby ensuring that the water-guiding core 5 can continuously guide the ink to flow to the pen tip 4.

[0036] See Figure 2 and Figure 4The ink storage cavity 101 is provided with a freely movable stirring bead 6, which freely moves irregularly in the ink storage cavity 101 during use or shaking of the direct liquid type pen, so as to stir the powder ink, keep the ink components uniformly mixed, and prevent uneven color and ink breakage caused by powder deposition during writing or drawing.

[0037] Referring to Figure 3 and Figure 5 It is worth mentioning that the upper end of the water reservoir 2 is provided with two spaced-apart stop tables 203, the spacing between the two stop tables 203 is smaller than the diameter of the stirring bead 6, the upper end of the water guide core 5 is between the two stop tables 203, and the top of the water guide core 5 is lower than the top surface of the two stop tables 203. In this way, when the stirring bead 6 moves irregularly in the ink storage cavity 101 during use or shaking of the direct liquid type pen, the two stop tables 203 stop the stirring bead 6, preventing the stirring bead 6 from impacting the water guide core 5, thereby effectively protecting the water guide core 5 from damage or displacement, stabilizing the ink output, and ensuring the service life of the direct liquid type pen.

[0038] Referring to Figure 6 The sharp sleeve 3 is provided with a plug hole, the plug hole is provided with a plurality of buckles 301 along the peripheral wall, the outer peripheral surface of the pen head 4 is provided with an annular groove 401, the pen head 4 is inserted into the plug hole, and the plurality of buckles 301 are clamped in the annular groove 401, so as to realize the fixed installation of the pen head 4.

[0039] The assembly process of the direct liquid type pen is as follows:

[0040] The ink is poured into the ink storage cavity 101 of the pen barrel 1, the water reservoir 2 is placed in the open end of the pen barrel 1, then the water guide core 5 is clamped by an external mechanical device and pushed into the center hole 201 of the water reservoir 2; after assembly to the predetermined position, the sharp sleeve 3 is installed at the open end of the pen barrel 1 in an interference fit and presses the water reservoir 2, and finally the pen head 4 is inserted into the plug hole of the sharp sleeve 3, so that the plurality of buckles 301 are clamped in the annular groove 401, and the pen head 4 further pushes the water guide core 5 to the position, at this time, the upper end of the pen head 4 and the lower end of the water guide core 5 elastically abut each other, and the water guide core 5 is clamped by the protruding ribs 202 of the water reservoir 2, so as to fix the water guide core 5, and complete the assembly.

[0041] It can be seen that the liquid direct type pen has the multiple convex ribs 202 which are spaced in the circumferential direction on the inner wall of the central hole 201 of the water reservoir 2, when the water leading core 5 is assembled, the multiple convex ribs 202 are used to increase the interference amount of the water leading core 5, the multiple convex ribs 202 extruding the water leading core 5 can increase the friction, meanwhile the convex ribs 202 can be clamped into the water leading core 5, the water leading core 5 is not easy to slide upward, the pen head 4 and the water leading core 5 can be reliably contacted, the original structure of the water leading core 5 is not needed to be changed, the production process of the water leading core 5 is not increased, the water leading core 5 can be conveniently assembled, and the production cost is reduced.

[0042] In the above description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the above description is merely a preferred embodiment of the present application, and the present application can be carried out in many different ways not specifically described herein, and therefore the present application is not limited by the above disclosed specific implementation. Meanwhile, any person skilled in the art can make many possible changes and modifications to the technical scheme of the present application, or modify it into equivalent embodiments, by using the disclosed methods and technical contents, without departing from the scope of the technical scheme of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical scheme of the present application, still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A direct liquid writing pen, comprising a pen barrel (1) with an ink storage cavity (101) inside and an open end, a water reservoir (2) built into the open end of the pen barrel (1), a tip sleeve (3) mounted on the open end of the pen barrel (1) and pressing the water reservoir (2), a pen tip (4) fixedly inserted into the tip sleeve (3), and a water guide core (5) for guiding ink, a central hole (201) is provided in the middle of the water reservoir (2) and penetrates both ends of the water reservoir (2), the water guide core (5) is inserted into the central hole (201), and the lower end of the water guide core (5) elastically abuts against the pen tip (4) and the upper end of the water guide core (5) extends into the ink storage cavity (101); characterized in that: The water reservoir (2) is provided with a plurality of convex ribs (202) distributed in the circumferential direction on the inner wall of the central hole (201), the plurality of convex ribs (202) extend along the axis direction of the central hole (201), and the plurality of convex ribs (202) are in interference fit with the water guide core (5).

2. The direct liquid writing pen according to claim 1, characterized in that: The lower end of the plurality of convex ribs (202) is provided with an angle (2021), and the angle (2021) is used to block the water guide core (5) when interference fit.

3. The direct liquid writing pen according to claim 1, wherein: The upper end of the plurality of convex ribs (202) extends to the upper end surface of the water reservoir (2), and the lower end of the plurality of convex ribs (202) extends to the middle part of the central hole (201).

4. The direct liquid writing pen according to any one of claims 1 to 3, characterized in that: The thickness of the plurality of convex ribs (202) in the radial direction of the central hole (201) is 0.1mm-0.8mm, and the length of the plurality of convex ribs (202) in the axial direction of the central hole (201) is 1mm-20mm.

5. The direct liquid writing pen according to claim 1, wherein: The number of the convex ribs (202) is 2-20.

6. The direct liquid writing pen according to claim 1, wherein: The inner diameter of the central hole (201) gradually decreases from bottom to top, and the diameter of the water guide core (5) is between the inner diameter of the lower end and the inner diameter of the upper end of the central hole (201).

7. The liquid ink pen of claim 1 wherein: The upper and lower ends of the water guide core (5) are both conical and symmetrically distributed.

8. The direct liquid writing pen according to claim 1, wherein: A freely movable stirring bead (6) is installed in the ink storage cavity (101).

9. The direct liquid writing pen according to claim 8, characterized in that: The upper end of the water reservoir (2) is provided with two stop platforms (203) distributed at intervals, the distance between the two stop platforms (203) is less than the diameter of the stirring bead (6), the upper end of the water guide core (5) is between the two stop platforms (203), and the top of the water guide core (5) is lower than the top surface of the two stop platforms (203).

10. The direct liquid writing pen according to claim 1, wherein: The sharp sleeve (3) is provided with a socket, the socket is provided with a plurality of buckles (301) on the peripheral wall, the outer peripheral surface of the pen head (4) is provided with an annular groove (401), the pen head (4) is inserted into the socket, and the plurality of buckles (301) are clamped in the annular groove (401).

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