2-color pen

Abstract

To provide a two-color pen.SOLUTION: The two-color pen comprises a pen body 1, a roller 2 and an ink supply part. The roller 2 is rotatably provided in a head of the pen body 1. The number of ink supply parts is at least one pair. The pen body 1 is provided with a reset device 5 that presses the ink supply part into contact with the roller 2. The roller 2 is provided with a transmission part that sequentially presses a pair of two ink supply parts alternately in a direction separate from the roller 2. The reset device 5 in the two-color pen can press the ink supply parts of different colors toward the roller 2. During rolling of the roller 2, the transmission part provided in the roller 2 can sequentially press the a pair of two ink supply parts alternately in the direction separate from the roller 2. The ink discharge ends of a pair of two ink supply parts are sequentially brought into contact with the roller 2 alternately under the operation of the reset device 5, and the roller 2 can draw a line or a pattern of two colors.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to the art of paintbrushes, and in particular to two-color pens. [Background technology]

[0002] At present, there is a paintbrush on the market that can directly draw a pattern, which includes a penholder and a pattern roller, the pattern roller is rotatably mounted on the tip of the penholder, the rotation axis of the pattern roller is perpendicular to the axis of the penholder, and a core and a fiber head for providing a pigment are provided inside the penholder, the tail end of the fiber head is inserted into the core to suck up the pigment in the core, and the head end of the fiber head is in sliding contact with the pattern roller, and when the pattern roller rolls on the paper, the fiber head can continuously rub the pigment against the pattern roller, so that the pattern roller can continuously draw the pigment on the paper in the form of a pattern, thereby completing the drawing of the pattern.

[0003] For example, in the Chinese utility model patent for a “continuous line drawing pen” (Patent No. 202222326757.2), during the process of drawing a line, the ink drawing device is always in contact with the pattern roller, and the pattern roller can draw a line or pattern on the paper.

[0004] However, the ink drawing device in the above-mentioned line drawing pen can only output one color of pigment to the pattern roller, so the color of the line or pattern drawn by the pattern roller is relatively monochromatic, and beautiful lines or patterns cannot be drawn, which cannot meet the needs of users. Therefore, the invention of a two-color pen that can draw lines or patterns with two colors is a technical problem that must be solved by those skilled in the art as soon as possible. Summary of the Invention

[0005] In order to solve the above problems in the prior art, the present invention provides a two-color pen to solve the technical problem that the ink drawing device in the line drawing pen can only output one color of pigment to the pattern roller, so the color of the line or pattern drawn by the pattern roller is relatively monochromatic and cannot meet the usage needs of users.

[0006] The present invention is realized by the following technical solutions:

[0007] The two-color pen is composed of a pen body, a rolling element, and an ink supply member. the rolling element is rotatably provided on the head of the pen body, The number of the ink supply members is at least one pair, and a reset device is provided on the pen body for pressing the ink supply members into contact with the rolling body, and a transmission unit is provided on the rolling body for sequentially and alternately pressing the two ink supply members of the pair in a direction away from the rolling body.

[0008] In order to better realize the present invention, as a further optimization of the above structure, the number of the ink supply members is two, the two ink supply members are all provided in the pen body, the transmission part includes two transmission parts A, the two transmission parts A are respectively provided at both ends of the rolling body, and the two transmission parts A are respectively transmissibly connected to the two ink supply members.

[0009] In order to better realize the present invention, as a further optimization of the above structure, the rolling element includes a plurality of drawing rollers, the transmission unit includes two transmission parts A and a plurality of transmission parts B, the plurality of drawing rollers are coaxially connected in sequence via the transmission part B to form an image area, the number of the drawing rollers is equal to the number of pairs of the ink supply members, and the two transmission parts A are provided at both ends of the image area, respectively, The multiple pairs of ink supply members correspond one-to-one to the positions of the multiple wire drawing rollers, and the transmission part B and the transmission part B or the transmission part A on both sides of the wire drawing roller are communicatively connected to the two ink supply members of the corresponding pairs.

[0010] In order to better realize the present invention, as a further optimization of the above structure, the ink supply member includes a water storage device and a water drainage device, the water storage device is fixedly arranged within the pen body, the water drainage device is slidably arranged between the water storage device and the rolling body, and the drainage end of the water drainage device is constantly connected to the ink discharge end of the water storage device.

[0011] In order to better realize the present invention, as a further optimization of the above structure, the drainage device includes a drainage seat and a drainage core, the drainage seat is slidably arranged between the water storage device and the rolling body, the drainage core is arranged on the drainage seat, and a pressure bump that acts in conjunction with the transmission part is provided on one end of the drainage seat facing the rolling body.

[0012] In order to better realize the present invention, the cross-sectional shape of the transmission part is a sector shape, and the arc surface of the transmission part is a pressing surface that abuts and cooperates with the pressing bump.

[0013] In order to better realize the present invention, as a further optimization of the above structure, the reset device is a coil spring, a limiting protrusion is provided on the peripheral side wall of the drain seat, the limiting protrusion is located at the end of the drain seat close to the rolling body, the reset device is fitted into the drain seat, one end of the reset device abuts against the head of the pen body, and the other end of the reset device abuts against the limiting protrusion, and the reset device is always in a compressed state.

[0014] In order to better realize the present invention, as a further optimization of the above structure, it further includes a limiting base, which is inserted into the head of the pen body, and a through hole is provided at a position corresponding to the water draining device of the limiting base, the water draining end of the water draining device passes through the through hole and is connected to the water storage device, one end of the resetting device away from the rolling body is abutted against the limiting base, and the rolling body is located at one end of the limiting base away from the pen body.

[0015] In order to better realize the present invention, the present invention further includes a fixed seat, which is inserted into one end of the limit base remote from the pen body, and two brackets are provided at one end of the fixed seat remote from the limit base, both ends of the rolling body are rotatably mounted on the two brackets respectively, and the water drainage device is slidably mounted between the limit base and the fixed seat.

[0016] In order to better realize the present invention, a sliding groove is provided on the inner wall of the fixed seat, the longitudinal direction of the sliding groove is parallel to the longitudinal direction of the pen body, and a protrusion that matches the sliding groove is provided on the side wall of the water drainage device, and the water drainage device is slidably mounted on the fixed seat by cooperation of the protrusion and the sliding groove.

[0017] In order to better realize the present invention, as a further optimization of the above structure, the rolling element has a cylindrical structure, a rotation shaft is provided at each end of the rolling element, the rolling element is rotatably mounted on the head of the pen body via the rotation shaft, and the axis of the rotation shaft is perpendicular to the longitudinal direction of the pen body.

[0018] In order to better realize the present invention, the above structure is further optimized by including a pen cover for protecting the rolling elements, the pen cover being detachably fitted on the head of the pen body.

[0019] In order to better realize the present invention, the above structure is further optimized by providing a pen tip at one end of the pen body remote from the rolling element, providing a water storage section in the pen body, and connecting the water draining end of the pen tip to the water storage section.

[0020] As described above, the two-color pen provided by the present invention has the following technical effects.

[0021] The reset device in the two-color pen can press ink supply members of different colors toward the rolling body, and during the rolling process of the rolling body, the transmission part provided on the rolling body sequentially and alternately presses the two ink supply members of the pair in the direction away from the rolling body, so that the ink discharge ends of the two ink supply members of the pair are abutted against the rolling body sequentially and alternately under the action of the reset device, allowing the rolling body to draw two-color lines or patterns, which can further meet the usage needs of users. [Brief description of the drawings]

[0022] In order to more clearly describe the technical solutions in the embodiments of the present invention or the prior art, the following briefly describes the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these accompanying drawings without creative labor. [Figure 1] FIG. 2 is a schematic diagram of the structure of the two-color pen of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view of a two-color pen of the present invention. [Diagram 3] FIG. 13 is a diagram showing the cooperative state of the rolling elements of the two-color pen and the water drainage device described in Example 1. [Figure 4] FIG. 2 is a structural schematic diagram of the water drainage device in the two-color pen of the present invention. [Diagram 5] FIG. 2 is a cross-sectional view of a fixed part in a two-color pen of the present invention. [Figure 6] FIG. 11 is a diagram showing the cooperative state of the rolling elements of the two-color pen and the water drainage device described in Example 2. [Figure 7] FIG. 11 is a front view of the two-color pen roller and the water draining device in cooperation with each other, as described in the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] In order to more clearly explain the objectives, technical solutions and advantages of the present invention, the technical solutions of the present invention are described in detail below. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative labor are all included in the protection scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "plurality" means two or more, and the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "top", "rear", "head", "tail", etc. are orientations or positional relationships based on the drawings and are used solely for purposes of illustrating and simplifying the description of the present invention, and are not intended to indicate or imply that such apparatus or devices necessarily have a particular orientation or must be constructed and operated in a particular orientation, and are not intended to limit the present invention. In addition, terms such as "first", "second", "third", etc. are used solely for purposes of explanation, and do not indicate or imply relative importance.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "attached", "coupled" and "connected" are understood in a broad sense, for example, they may be fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intermediate medium. Those skilled in the art can appropriately understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0026] <Example 1> As shown in Figs. A two-color pen, specifically a single-line two-color pen, is composed of a pen body 1, a rolling element 2, and an ink supply member, A cavity is provided inside the pen body 1, an opening communicating with the cavity is provided in the head of the pen body 1, and the rolling element 2 is rotatably provided in the head of the pen body 1, i.e., in the opening of the pen body 1; The number of ink supply members is at least one pair, and a reset device 5 is provided on the pen body 1 for pressing the ink supply member into contact with the rolling body 2, and a transmission section is provided on the rolling body 2 for sequentially and alternately pressing the two ink supply members of the pair in a direction away from the rolling body 2.

[0027] The two ink supply members of a pair have pigments of different colors, and the reset device 5 in the two-color pen presses the ink supply members of different colors toward the rolling body 2. During the rolling process of the rolling body 2, the transmission unit provided on the rolling body 2 presses the two ink supply members of the pair alternately and sequentially in a direction away from the rolling body 2, and one of the water drainage devices 4 is pressed in a direction away from the rolling body 2 by the transmission unit, so that the ink discharge ends of the two ink supply members of the pair are abutted against the rolling body 2 alternately and sequentially under the action of the reset device 5, and the rolling body 2 draws two-color lines or patterns (the two colors are distributed intermittently on the lines or patterns), which can further meet the user's usage needs.

[0028] Specifically, the number of the ink supply members is two, the two ink supply members are slidably mounted on the pen body 1, and the sliding direction of the ink supply members is parallel to the longitudinal direction of the pen body 1; The above-mentioned transmission unit includes two transmission parts A23, which are respectively provided at both ends of the rolling body 2, and each of the two transmission parts A23 is respectively communicably connected to two ink supply members. Through the two transmission parts A23, the two ink supply members are sequentially and alternately pressed in a direction away from the rolling body 2, so that the rolling body 2 can draw a two-color line or pattern.

[0029] Preferably, the ink supply member includes a water storage device 3 and a water drainage device 4; The water storage device 3 is fixedly provided within the pen body 1, and the water drainage device 4 is slidably provided between the water storage device 3 and the rolling body 2. The drainage end of the water drainage device 4 is always connected to the ink discharge end of the water storage device 3, and the pigment in the water storage device 3 is transferred to the surface of the rolling body 2 through the water drainage device 4 and is drawn at the desired position through the rolling body 2.

[0030] Preferably, the water draining device 4 includes a water drain seat 41 and a water draining core 42, The drain seat 41 is slidably provided between the water storage device 3 and the rolling body 2, the drain core 42 is provided in the drain seat 41, and a pressure bump 411 is provided on one end of the drain seat 41 facing the rolling body 2, When the protruding surface of the transmission part abuts against the pressure bump 411, the drain seat 41 is pressed in a direction away from the rolling body 2 by the transmission part, the drain seat 41 moves in a direction away from the rolling body 2, the ink discharge end of the drain core 42 moves away from the rolling body 2, and it becomes impossible to supply pigment to the surface of the rolling body 2.

[0031] Preferably, the cross-sectional shape of the transmission part is a sector shape, and the arc surface of the transmission part is a pressing surface that abuts and cooperates with the pressing bump 411 .

[0032] In addition, the number of transmission parts at both ends of the above-mentioned rolling body 2 may be multiple, and the multiple transmission parts at the same end may be arranged at equal intervals around the rolling center of the rolling body 2, changing the frequency of contact between the two water drainage devices 4 and the rolling body 2, and changing the spacing frequency of the two colors in the line or pattern drawn with the two-color pen.

[0033] The combined shape of the projected surfaces of the multiple transmission parts at both ends of the rolling element 2 is a perfect circle.

[0034] Preferably, the reset device 5 is a coil spring, and a limiting protrusion 412 is provided on the peripheral side wall of the drain seat 41, the limiting protrusion 412 is located at the end of the drain seat 41 close to the rolling element 2, the reset device 5 is fitted into the drain seat 41, the reset device 5 is securely attached by the drain seat 41, one end of the reset device 5 abuts against the opening, and the other end of the reset device 5 abuts against the limiting protrusion 412, the reset device 5 is always in a compressed state, and the restoring force generated by the reset device 5 presses the drain seat 41 in a direction away from the cavity, If the protruding surface of the transmission part does not abut against the pressure bump 411 , the restoring force generated by the reset device 5 presses the water drainage device 4 toward the rolling element 2 , and the ink discharge end of the water drainage core 42 abuts against the circumferential side wall of the rolling element 2 .

[0035] Preferably, the two-color pen further comprises a limiting base 11, The limiting base 11 is inserted into the head of the pen body 1, and a through hole is provided in the limiting base 11 at a position corresponding to the drainage device 4. The drainage end of the drainage device 4 has a rod-shaped structure, and the drainage end of the drainage device 4 passes through the through hole and is slidably provided in the water storage device 3. During the sliding process of the water drainage device 4, the drainage end of the water drainage device 4 is constantly in communication with the water storage device 3, and the pigment in the water storage device 3 is drawn into the rolling body 2 through the water drainage device 4. One end of the reset device 5 remote from the rolling element 2 is abutted against the limit base 11 .

[0036] Preferably, the two-tone pen further comprises a fixed seat 12, The fixed base 12 is inserted into one end of the limiting base 11 remote from the pen body 1, and two brackets 121 are provided at one end of the fixed base 12 remote from the limiting base 11. Both ends of the rolling body 2 are rotatably mounted on the two brackets 121 respectively, which makes it more convenient to install the rolling body 2. The above-mentioned water drainage device 4 is slidably mounted between the limiting base 11 and the fixed base 12.

[0037] Preferably, two sliding grooves 122 are provided on the inner wall of the fixed base 12, the longitudinal direction of the sliding grooves 122 is parallel to the longitudinal direction of the pen body 1, and a protrusion matching the sliding groove 122 is provided on the side wall of the water draining device 4, the two water draining devices 4 are slidably mounted on the fixed base 12 by cooperation of the protrusion and the sliding groove, and are used to restrict the sliding direction of the water draining device 4; when the water draining core 42 abuts against the rolling body 2, the repulsive force of the rolling body 2 against the water draining core 42 presses the water draining core 42 toward the water draining base 41, thereby avoiding the situation of the water draining core 42 being misaligned, and the structure of the two-color pen is more stable.

[0038] Preferably, the rolling element 2 has a cylindrical structure, a rotating shaft 22 is provided at both ends of the rolling element 2, the rolling element 2 is rotatably mounted on the bracket 121 via the rotating shaft 22, and the axis of the rotating shaft 22 is perpendicular to the longitudinal direction of the pen body 1; A pattern ridge is provided on the circumferential side wall of the rolling element 2, and the pattern ridge is provided around the circumferential direction of the rolling element 2, and the ink discharge ends of the two water draining devices 4 are successively and alternately brought into contact with the pattern ridges.

[0039] In addition, the above-mentioned pattern ridges may be linear or wavy. When the pattern ridges are linear, the two-color pen can draw two colors alternately in a linear manner. When the pattern ridges are wavy, the two-color pen can draw two colors alternately in a wavy manner. The pattern ridges are provided with a design or pattern so that the two-color pen can write an alternating two-color pattern.

[0040] Preferably, the two-color pen further includes a pen cover 6, which is detachably fitted onto one end of the pen body 1 where the rolling element 2 is provided, so as to better protect the rolling element 2 and avoid the situation where the rolling element 2 is damaged and the drawn line or pattern is incomplete.

[0041] Preferably, a pen tip 7 is provided at one end of the pen body 1 remote from the rolling element 2, a water storage section 8 is provided inside the pen body 1, and a water draining end of the pen tip 7 is connected to the water storage section 8; When a user needs to use a normal paintbrush, the user can turn the pen body 1 over and use the pen tip 7 at one end of the pen body 1 away from the rolling element 2 to draw a pattern or line, making the two-color pen more convenient to use.

[0042] <Example 2> As shown in Figs. 1, 2 and 4 to 7, A two-color pen, specifically a multi-line two-color pen, is composed of a pen body 1, a rolling element 2, and an ink supply member, A cavity is provided inside the pen body 1, an opening communicating with the cavity is provided in the head of the pen body 1, and the rolling element 2 is rotatably provided in the head of the pen body 1, The number of ink supply members is at least one pair, and a reset device 5 is provided on the pen body 1 for pressing the ink supply member into contact with the rolling body 2, and a transmission section is provided on the rolling body 2 for sequentially and alternately pressing the two ink supply members of the pair in a direction away from the rolling body 2.

[0043] The rolling element 2 includes a plurality of drawing rollers 21, the transmission section includes two transmission parts A23 and a plurality of transmission parts B24, the plurality of drawing rollers 21 are sequentially connected coaxially via the transmission parts B24 to form an image section, the number of drawing rollers 21 is equal to the number of pairs of ink supply members, and the two transmission parts A23 are provided at both ends of the image section, respectively, The multiple pairs of ink supply members correspond one-to-one to the positions of the multiple drawing rollers 21, and the transmission parts B24 and B24 or A23 on both sides of the drawing roller 21 sequentially and alternately press the two ink supply members of the pair corresponding to the rolling body 2 in a direction away from the rolling body 2, so that the ink discharge ends of the two ink supply members of the pair corresponding to the drawing roller 21 are abutted against the drawing roller 21 sequentially and alternately under the action of the reset device 5.

[0044] It should be noted that the number of pairs does not mean the inverse of a mathematical power, but means the number of pairs of ink supply members.

[0045] When the image area rolls, the transmission parts B24 and B24 or A23 on both sides of the drawing roller 21 sequentially and alternately press the two ink supply members corresponding to the drawing roller 21 in a direction away from the drawing roller 21, and the ink discharge ends of the two ink supply members are sequentially and alternately abutted against the drawing roller 21 under the action of the reset device 5, transferring the pigment in the ink supply members to the drawing roller 21, drawing the desired position via the drawing roller 21, and completing the drawing of multiple lines.

[0046] In addition, the above-mentioned line drawing roller 21 can draw two-color lines or patterns (the two colors are distributed intermittently on the line or pattern), and an image area consisting of multiple line drawing rollers 21 can draw multiple lines, with the number of lines being equal to the number of line drawing rollers 21.

[0047] In addition, the other structures of the two-color pen described in this embodiment are completely similar to the other structures of the two-color pen described in Example 1, and specific reference may be made to the contents of Example 1, and detailed explanations will be omitted here.

[0048] Although the specific embodiments of the present invention have been described above, the scope of protection of the present invention is not limited thereto, and any modifications or replacements that a person skilled in the art can easily think of within the technical scope of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims. [Explanation of symbols]

[0049] 1 pen body 11 Restricted Base 12 Fixed seat 121 Bracket 122 Slide groove 2 Rolling elements 21 Wire drawing roller 22 Rotation axis 23 Transmission Part A 24 Transmission Part B 3. Water storage device 4. Water drainage device 41 Water drain seat 411 Press Bump 412 Limiting protrusion 42 Water draining core 5 Reset device 6 Pen Cover 7. Pen Tip 8. Water storage section

Claims

1. The pen comprises a pen body (1), a rolling element (2), and an ink supply member; The rolling element (2) is rotatably provided on the head of the pen body (1), A two-color pen characterized in that the number of the ink supply members is at least one pair, the pen body (1) is provided with a reset device (5) that presses the ink supply member into contact with the rolling body (2), and the rolling body (2) is provided with a transmission unit that presses the two ink supply members of the pair alternately in a direction away from the rolling body (2) in sequence.

2. The two-color pen according to claim 1, characterized in that the number of the ink supply members is two, the two ink supply members are all provided in the pen body (1), the transmission section includes two transmission parts A (23), the two transmission parts A (23) are respectively provided at both ends of the rolling body (2), and the two transmission parts A (23) are each connected to the two ink supply members in a communicable manner.

3. the rolling body (2) includes a plurality of drawing rollers (21), the transmission section includes two transmission parts A (23) and a plurality of transmission parts B (24), the plurality of drawing rollers (21) are sequentially connected coaxially via the transmission part B (24) to form an image area, the number of drawing rollers (21) is equal to the number of pairs of the ink supply members, and the two transmission parts A (23) are provided at both ends of the image area, The two-color pen according to claim 1, characterized in that the pairs of ink supply members correspond one-to-one to the positions of the multiple drawing rollers (21), and the transmission part B (24) and the transmission part B (24) or the transmission part A (23) on both sides of the drawing roller (21) are communicatively connected to the two ink supply members of the corresponding pairs.

4. The two-color pen according to claim 2 or 3, characterized in that the ink supply member includes a water storage device (3) and a water drainage device (4), the water storage device (3) is fixedly provided within the pen body (1), the water drainage device (4) is slidably provided between the water storage device (3) and the rolling body (2), and the water drainage end of the water drainage device (4) is constantly connected to the ink discharge end of the water storage device (3).

5. The two-color pen according to claim 4, characterized in that the water drainage device (4) includes a water drainage seat (41) and a water drainage core (42), the water drainage seat (41) is slidably arranged between the water storage device (3) and the rolling body (2), the water drainage core (42) is arranged on the water drainage seat (41), and a pressure bump (411) that acts in conjunction with the transmission part is provided on one end of the water drainage seat (41) facing the rolling body (2).

6. 6. The two-color pen according to claim 5, wherein the cross-sectional shape of the transmission part is a sector shape, and the arc surface of the transmission part is a pressing surface that abuts and cooperates with the pressing bump (411).

7. The two-color pen according to claim 6, characterized in that the reset device (5) is a coil spring, a limiting protrusion (412) is provided on the peripheral side wall of the drain seat (41), the limiting protrusion (412) is located at the end of the drain seat (41) close to the rolling element (2), the reset device (5) is fitted into the drain seat (41), one end of the reset device (5) is abutted against the head of the pen body (1), the other end of the reset device (5) is abutted against the limiting protrusion (412), and the reset device (5) is always in a compressed state.

8. The two-color pen according to claim 7, further comprising a limiting base (11), the limiting base (11) being inserted into the head of the pen body (1), the limiting base (11) having a through hole at a position corresponding to the water draining device (4), the water draining end of the water draining device (4) passing through the through hole and connected to the water storage device (3), one end of the reset device (5) remote from the rolling body (2) abutting against the limiting base (11), and the rolling body (2) being located at one end of the limiting base (11) remote from the pen body (1).

9. The two-color pen according to claim 8, further comprising a fixed seat (12), the fixed seat (12) being inserted into one end of the limiting base (11) remote from the pen body (1), two brackets (121) being provided at one end of the fixed seat (12) remote from the limiting base (11), both ends of the rolling body (2) being rotatably mounted on the two brackets (121), respectively, and the water draining device (4) being slidably mounted between the limiting base (11) and the fixed seat (12).

10. The two-color pen according to claim 9, characterized in that a sliding groove (122) is provided on an inner wall of the fixed seat (12), the longitudinal direction of the sliding groove (122) is parallel to the longitudinal direction of the pen body (1), a protrusion matching the sliding groove is provided on a side wall of the water drainage device (4), and the water drainage device (4) is slidably mounted on the fixed seat (12) by cooperation between the protrusion and the sliding groove.

11. The two-color pen according to claim 10, characterized in that the rolling element (2) has a cylindrical structure, a rotation shaft (22) is provided at each end of the rolling element (2), the rolling element (2) is rotatably mounted on the head of the pen body (1) via the rotation shaft (22), and the axis of the rotation shaft (22) is perpendicular to the longitudinal direction of the pen body (1).

12. The two-color pen according to claim 11, further comprising a pen cover (6) for protecting the rolling elements (2), the pen cover (6) being detachably fitted to the head of the pen body (1).

13. The two-color pen according to claim 12, characterized in that a pen tip (7) is provided at one end of the pen body (1) remote from the rolling element (2), a water storage section (8) is provided in the pen body (1), and a water drainage end of the pen tip (7) is connected to the water storage section (8).

Images