Rotary color-changing double-rod double-head marking pen

Abstract

The utility model discloses a rotary color-changing double-rod double-head marking pen which comprises two marking pen bodies with different colors and an ink mixer, and the ink mixer is in a hollow tubular shape and is provided with a deformation portion capable of generating elastic deformation. The rotary color-changing double-rod double-head marking pen has two states, namely an original assembly state and an ink mixing state, in the original assembly state, the two marking pens are inserted from the two ends of the ink mixer respectively, and pen heads of the two marking pens are opposite to each other and do not make contact with each other; when torsion in opposite directions is applied to the two marking pens to enable the two marking pens to drive the two ends of the ink mixer to rotate in the opposite directions, the deformation part can be forced to be distorted and deformed, so that the length of the ink mixer is shortened, and the two pen points abut against each other for mutual ink channeling and color mixing. At the moment, the rotary color-changing double-rod double-head marking pen is in an ink mixing state. The ink of the two marking pens can mutually permeate into the pen points of the two marking pens, ink channeling and color changing are completed, and selection of a user on the number of colors is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of pens, in particular to a rotary color-changing double-rod double-headed marker pen. Background Art

[0002] At present, common markers used in traditional art painting, student illustration, comic design, and writing tools, such as watercolor pens, whiteboard pens, acrylic markers, etc., especially watercolor pens for painting enthusiasts and children's educational development, are all designed to be single-color. Each pen can only be filled with one color of watercolor ink and can be used alone when painting. Generally, manufacturers can only make dozens of colors. Especially for painting enthusiasts, there is not much room for choosing painting colors, which makes the colors on the picture appear monotonous, not very bright and eye-catching, lacking artistic atmosphere, affecting the sense of picture and appreciation.

[0003] In order to achieve more diverse painting and writing effects, although some double-headed or even multi-headed markers have appeared on the market, most of these markers simply combine pen tips of different colors together, and cannot achieve color mixing and changing, and thus cannot meet the needs of multiple colors or mixed colors in specific situations.

[0004] Therefore, in order to meet the pursuit of more colors and mixed color gradients by painting enthusiasts, to bring users unlimited space for imagination and creative ability improvement, and to enrich and satisfy people's cultural life, it is necessary to make bold innovations and breakthroughs in existing markers and develop a color-changing double-rod double-headed marker. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a rotary color-changing double-rod double-headed marker pen to overcome the defect that the existing marker pen cannot change color.

[0006] In order to solve the technical problems, the present invention adopts the following technical solution: a rotary color-changing double-rod double-headed marker pen, comprising: two markers of different colors and an ink mixer, the ink mixer being a hollow tube and provided with a deformation portion that can generate elastic deformation; the rotary color-changing double-rod double-headed marker pen has two states, namely an original assembly state and an ink mixing state, in which the two markers are respectively inserted from the two ends of the ink mixer, and the pen tips of the two markers are opposite to each other and do not contact each other; when a torsional force in opposite directions is applied to the two markers so that the two markers drive the two ends of the ink mixer to rotate in opposite directions, the deformation portion can be forced to twist and deform to shorten the length of the ink mixer, so that the two pen tips abut against each other to mix ink and color, and at this time the rotary color-changing double-rod double-headed marker pen is in the ink mixing state.

[0007] As a further improvement of the present invention, both ends of the ink mixer are provided with plug-in cylinders for inserting the marker pen, and at least one of the plug-in cylinders is provided with multiple windows along the circumferential direction, and the connecting ribs between two adjacent windows form the deformation part.

[0008] As a further improvement of the present invention, the plug-in tube is provided with a limit column extending axially in the window, the limit column is provided with a notch, and two stop surfaces opposite to each other are formed at the notch, and the two stop surfaces are used to stop each other in the ink mixing state to limit the axial movement of the marker.

[0009] As a further improvement of the present invention, circumferential positioning features are provided on the inner walls of the marking pen and the plug-in tube. In the original assembly state and the ink mixing state, the marking pen is circumferentially positioned by the circumferential positioning features to limit the relative rotation of the plug-in tube and the marking pen inserted therein in the circumferential direction.

[0010] As a further improvement of the present invention, a connecting tube is provided in the middle of the ink mixer, and the connecting tube is fixedly connected between the two plug-in tubes. In the ink mixing state, the two pen tips abut against each other in the connecting tube to mix ink and color.

[0011] As a further improvement of the present invention, the rotary color-changing double-rod double-headed marker also includes a pen cover, which is tubular and is mounted on the ink mixer; a first annular step is provided on the ends of the two connecting tubes that are close to each other, and a first annular rib is provided on the inner surface of the pen cover, and the first step and the first annular rib are transitionally matched to achieve axial positioning of the ink mixer and the pen cover.

[0012] As a further improvement of the present invention, the other ends of the two connecting tubes that are away from each other are each provided with a plurality of ribs uniformly distributed along the circumference on the outer surface thereof, and the plurality of ribs are all in clearance fit with the inner surface of the pen cover.

[0013] As a further improvement of the present invention, both of the marking pens include a tail plug, a pen barrel, a rolled core and a pen tip. The pen barrel is a hollow and stepped cylinder with a certain wall thickness. The rolled core is built into the pen barrel. The pen tip is installed at one end of the pen barrel and inserted into the rolled core. The tail plug is installed at the other end of the pen barrel and presses the rolled core. A second step is provided on the pen barrel. In the original assembly state, the second step rests against the end face of the ink mixer.

[0014] As a further improvement of the present invention, the ink mixer is integrally injection-molded from a plastic material; and the pen tip is processed and molded from a fiber material.

[0015] As a further improvement of the present invention, in the original assembly state, the distance between the two pen tips is 0.7mm-1mm.

[0016] The beneficial effects of the present invention are as follows: the present invention provides a rotating color-changing double-rod double-headed marker, which is provided with two markers of different colors and an ink mixer, and a deformation part is provided on the ink mixer. When two hands hold the single markers of different colors on both sides and rotate them in opposite directions for a certain angle at the same time, the deformation part is twisted and elastically deformed along the axial direction under the action of torque, so that the length of the ink mixer is shortened, and the two markers of different colors approach each other along the axial direction, forcing the heads of the two pen tips to elastically contact each other and close together. At this time, since the fibers between the two pen tips have the function of absorbing and guiding ink, the ink in each pen tip penetrates into the other pen tip, and the ink changes color with each other, thereby making it possible to draw mixed and gradient gorgeous colors beyond the two pens, thereby increasing the user's choice in the number of colors. At the same time, the utility model also provides a limit column with a notch on the ink mixer. During the action of torque, the two stop surfaces located on the notch fit together and stop each other, thereby limiting the marker from rotating further, ensuring that the two pen tips are elastically deformed and in contact with each other, without causing the heads of the two pen tips to be squeezed and damaged by each other due to excessive deformation, thereby playing the role of axial limitation and protection of the pen tips. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the utility model's rotating color-changing double-rod double-headed marker;

[0018] Figure 2 This is a cross-sectional view of the rotary color-changing double-rod double-headed marker pen of the utility model;

[0019] Figure 3 This is an exploded view of the rotary color-changing double-rod double-headed marker pen of the utility model;

[0020] Figure 4 A three-dimensional diagram of the marker pen of the present invention;

[0021] Figure 5 This is an exploded view of the marker pen in the present invention;

[0022] Figure 6 It is a cross-sectional view of the pen holder in the present utility model;

[0023] Figure 7 It is a three-dimensional diagram of the ink mixer in the present invention;

[0024] Figure 8 This is a front view of the ink mixer in the present invention;

[0025] Figure 9 For this utility model Figure 8Cross-sectional view in the AA direction;

[0026] Figure 10 For this utility model Figure 8 Cross-sectional view in the middle BB direction;

[0027] Figure 11 For this utility model Figure 8 Cross-sectional view in CC direction;

[0028] Figure 12 A three-dimensional diagram of the pen cover of the present invention;

[0029] Figure 13 It is a cross-sectional perspective view of the pen cover in the present invention.

[0030] The following description is made with reference to the accompanying drawings:

[0031] 1. Tail plug; 11. Third ring rib; 12. Third step; 2. Pen body; 21. Second ring rib; 22. Lower section; 23. Middle section; 24. Upper section; 25. Fourth ring rib; 26. Inner rib; 27. Second step; 28. Positioning rib; 3. Wrap core; 4. Pen tip; 41. Head; 42. Fourth step; 43. Middle part; 44. Tail; 5. Ink mixer; 50. Deformation part; 51. Convex rib; 52. Notch; 521. Stop surface; 53. Fifth ring rib; 54. Chamfer; 55. First step; 56. Window; 57. Connecting tube; 58. Connecting tube; 59. Limiting column; 6. Pen cap; 61. First ring rib. DETAILED DESCRIPTION

[0032] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0033] The following specific embodiment details the structure of the rotary color-changing dual-stem, dual-tipped marker described in this application. The description is based on two states: holding two markers in each hand and rotating them simultaneously in opposite directions until the tips (4) of the two markers collide and mix, and then removing the torque to allow the two markers to be assembled with a normal clearance.

[0034] See Figures 1 to 13 The utility model provides a rotary color-changing double-rod double-headed marker, comprising: two markers of different colors and an ink mixer 5, the ink mixer 5 is a hollow tube, and is provided with a deformation portion 50 that can produce elastic deformation.

[0035] The rotary color-changing double-stem, double-ended marker pen of the present invention has two states: an initial assembly state and an ink mixing state. In the initial assembly state, two markers are inserted from opposite ends of the ink mixer 5, with the nibs 4 of the two markers facing each other and not touching each other. When torque is applied to the two markers in opposite directions, causing the two markers to rotate the two ends of the ink mixer 5 in opposite directions, the deformable portion 50 is forced to twist and deform, shortening the length of the ink mixer 5, causing the two nibs 4 to abut against each other and mix ink. At this time, the rotary color-changing double-stem, double-ended marker pen is in the ink mixing state.

[0036] In the ink mixing state, the ink in the nibs 4 of the two markers penetrates into the nibs 4 of the other party. After a period of mixing, since the ink in each nib 4 is a mixture of two different colors of ink, it will be blurred for a few seconds. At this time, take out the two markers and use them to draw or write mixed and gradient colors.

[0037] This new rotating color-changing double-rod, double-ended marker breaks through the traditional thinking and structural methods of traditional markers, overturning the historical combination structure of markers. It elevates the technical level and innovation capabilities of this field, greatly extending and expanding the marker's functionality. It allows for more flexible use of color in creative works, helping painting enthusiasts explore the world of color. It allows users to effectively and fully unleash their imagination when painting, producing unexpected effects, making the picture more realistic, the colors richer, and the colors more full and bright, providing a guarantee for creators to create outstanding works. Furthermore, its simple and compact structure, easy assembly, and ease of processing, combined with its low cost, make it suitable for mass production. When used, it is extremely convenient, practical, natural, comfortable, and user-friendly, giving people a sense of novelty and beauty.

[0038] It should be noted that the marker pen can adopt a variety of structural forms, as long as it can be positioned in both the axial and circumferential directions after being plugged into the ink mixer 5. Figures 3 to 6 The structure of the marker pen shown in the figure is explained in detail.

[0039] In this embodiment, both marking pens include a tail plug 1 , a pen body 2 , a winding core 3 and a pen tip 4 .

[0040] The penholder 2 is a cylindrical body with a certain wall thickness, a hollow interior, and a stepped shape. The outer diameter transitions from small to large from bottom to top. The penholder 2 comprises a lower section 22, a middle section 23, and an upper section 24, connected sequentially from bottom to top. On the front end surface of the lower section 22, a second annular rib 21 is formed by radially rotating a small arc with a certain chord length, i.e., width, that protrudes slightly from the middle surface. This second annular rib 21 transitions with the fifth annular rib 53 within the ink mixer 5, serving as one of the axial positioning mechanisms for the penholder 2. Simultaneously, on the inner surface of the lower section 22, an inner rib 26 is formed by stretching a small arc of a certain length and width that protrudes a certain height from the inner surface in the axial direction. The inner ribs 26 are evenly distributed along the circumference of the inner surface of the lower section 22. The inner surface of these inner ribs 26 forms an interference fit with the outer surface of the middle part 43 of the pen tip 4, and reaches the specified axial fitting force. Then, the fourth step 42 of the pen tip 4 itself contacts the end face of the lower section 22, so that the pen tip 4 is axially positioned at the front end of the pen shaft 2.

[0041] Furthermore, the middle section 23 of the pen shaft 2 is used to be plugged into and matched with the plug-in tube 58 of the ink mixer 5, and the middle section 23 of the marker pen and the inner wall of the plug-in tube 58 are provided with circumferential positioning features. In the original assembly state and the ink mixing state, the marker pen is circumferentially positioned by the circumferential positioning features to limit the relative rotation of the plug-in tube 58 and the marker pen inserted therein in the circumferential direction, and then when torque is applied to the marker pen, the plug-in tube 58 of the ink mixer 5 can be synchronously driven to rotate.

[0042] In this embodiment, the circumferential positioning features include a regular polygonal outer surface provided on the middle section 23 and a regular polygonal inner surface provided on the plug-in tube 58, that is, the outer shape of the middle section 23 is a regular polygon and the interior is hollow. The number of sides of the regular polygonal outer surface and the number of sides of the regular polygonal inner surface of the plug-in tube 58 are maintained at the same number, which is conducive to mutual matching and torque transmission, so that the ink mixer 5 can smoothly perform twisting elastic deformation, forcing the two pen tips 4 to fully elastically contact and be in an ink mixing state, completing the functions of ink channeling, diffusion, and dyeing between each other.

[0043] Of course, in other embodiments of the present invention, the circumferential positioning feature may also include a protrusion provided on the middle section 23 and a limiting groove provided inside the plug-in tube 58. The protrusion and the limiting groove can also play a circumferential positioning role.

[0044] Furthermore, the upper section 24 is a hollow rotating body with a certain wall thickness, into which the winding core 3 is inserted, with a clearance fit between the two. Several positioning ribs 28 are evenly distributed along the circumferential direction on the internal step surface at the junction of the middle section 23 and the upper section 24, and one end face of the winding core 3 contacts the positioning rib 28. The upper section 24 is provided with a fourth annular rib 25 on its inner surface at a certain distance from its upper end face. The cross-section of the fourth annular rib 25 is still a closed shape formed by a small arc and a certain width. It is formed by rotating one circle along the inner surface of the upper section 24. This fourth annular rib 25 forms an interference fit with the third annular rib 11 of the tail plug 1. At the same time, the third step 12 of the tail plug 1 contacts the upper end face of the upper section 24, forming an axial limit, so that the tail plug 1 and the pen body 2 are assembled and fixed together, and the specified axial fit force is achieved.

[0045] In this embodiment, the wrapping core 3 is cylindrical and consists of an outer sheath and an inner fiber bundle. The inner layer contains a certain number of bundled fiber filaments, which have a soft, spongy feel. Microscopic gaps are maintained between the fibers, allowing ink to be stored and absorbed within them. The outer sheath is a thin-walled tubular structure typically made of polypropylene (PP). A dedicated forming machine heats, pressurizes, and injection molds the PP raw material into a barrel, applying heat and pressure to the outermost surface of the bundled fiber filaments of a certain diameter, forming a thin plastic film-like outer sheath. After cooling and cutting, the wrapping core 3 is formed into a single piece. The outer sheath protects the ink from leaking out and drying out. Furthermore, the other end face of the wrapping core 3 has a certain axial interference fit with the cylindrical end face of the tail plug 1, which helps to position the wrapping core 3 axially.

[0046] See Figure 5 The pen tip 4 in this embodiment has a stepped solid rotating body structure, which is formed by a certain number of fiber bundles such as nylon or polyester fibers through special equipment. It has a specified surface hardness and becomes soft and has a certain elasticity after absorbing ink. The pen tip 4 includes a head 41, a middle part 43 and a tail 44 connected in sequence from bottom to top, and the diameter changes from large to small from the head 41 to the tail 44. The head 41 and the middle part 43 of the pen tip 4 are stepped, and a fourth step 42 is formed therebetween. The fourth step 42 contacts the end face of the lower section 22 of the pen shaft 2 to position it axially. The middle part 43 of the pen tip 4 is inserted into the interior of the lower section 22, and at the same time has an interference fit with the inner rib 26, and reaches a certain fitting force, so that the pen tip 4 is radially positioned. Since there is a fourth step 42 between the outer surfaces of the head portion 41 and the middle portion 43, which presses against the end surface of the lower section 22, although there is an axial force component when the user draws, the fourth step 42 on the pen tip 4 will not retract into the pen shaft 2, thereby positioning the pen tip 4 both axially and radially.

[0047] In addition, the tail portion 44 is inserted into the fiber bundle at one end of the winding core 3 and has a certain matching length, which allows the ink in the fiber bundle to pass smoothly through the pen tip 4 and be drawn out to the head portion 41 of the pen tip for use by painters and others.

[0048] See Figures 7 to 11 In this embodiment, the ink mixer 5 is shaped like a hollow dumbbell, with large diameter sections at both ends and a small diameter section in the middle. It is typically integrally injection-molded from a plastic material, specifically transparent PP plastic in this embodiment. The large-diameter sections at each end of the ink mixer 5 serve as plug-in barrels 58, each for inserting two markers. The small-diameter section in the middle of the ink mixer 5 serves as a connecting tube 57, which is fixedly connected between the two plug-in barrels 58 and forms two first steps 55 at the connection. When mixing ink, the two pen tips 4 rest against each other within the connecting tube 57, allowing the ink to flow and mix.

[0049] like Figure 10 As shown, the inner surfaces of the two plug-in tubes 58 are regular polygons, and the number of sides and size match the outer surface of the regular polygon on the middle section 23 of the pen body 2. The two are matched with a small gap, so that the two pen bodies 2 are both circumferentially positioned.

[0050] It is worth mentioning that, on the wall thickness of the two plug-in tubes 58 , starting from a certain distance from the first step 55 , a plurality of rectangular windows 56 with a certain length and width are provided along the axial direction. The plurality of windows 56 are evenly distributed in the circumferential direction of the plug-in tube 58 , and the connecting ribs between two adjacent windows 56 form a deformation part 50 .

[0051] In addition, the plug-in cylinder 58 is provided with a limit post 59 extending in the axial direction in the window 56, and the two ends of the limit post 59 are respectively connected to the two corresponding inner walls of the window 56. The limit post 59 is provided with a notch 52. The notch 52 can be set in the middle of the limit post 59 to divide the limit post 59 into two, thereby forming two stop surfaces 521 spaced apart from each other at the notch 52; or the notch 52 can be set at the end of the limit post 59, and two stop surfaces 521 spaced apart from each other are also formed at the notch 52 (one stop surface 521 is on the limit post 59, and the other stop surface 521 is on an inner wall of the window 56 opposite to the limit post 59). The two stop surfaces 521 are used to stop each other in the ink mixing state to limit the axial movement of the marker.

[0052] The present invention provides evenly distributed windows 56 on the ink mixer 5 to form a deformation area 50 between adjacent windows 56. Furthermore, a limiting post 59 with a notch 52 is provided within the window 56. The functions and effects of the ink mixer 5 are as follows: when the ink mixer 5 is in the mixing state, i.e., subjected to a certain torque, it can be elastically deformed, forcing the two pen tips 4 to contact each other. The length and width of the windows 56 and the axial height of the notch 52 can be determined based on experience and practice to ensure an appropriate feel and axially limit the pen tips 4, thereby meeting the specified functional requirements. When the torque is removed, the ink mixer 5 can elastically return to its original assembly state, ensuring a certain gap between the two pen tips 4. Preferably, in the original assembly state, the spacing between the two pen tips 4 is 0.7 mm to 1 mm. Furthermore, when subjected to a certain torque, the total length of the ink mixer 5 is forced to shorten, causing the pen tips 4 of the two markers mounted on the connector 58 to contact each other, completing the task of ink mixing and color mixing. Furthermore, by properly designing the axial width of the notch 52 to limit the axial travel of the markers during ink mixing, the two pen tips 4 can be controlled to avoid infinite proximity, but rather to maintain a certain amount of elastic deformation between them. For example, if the axial width of the notch 52 is too large, the axial travel of the two symmetrically distributed markers will increase under the action of torsional forces. This can easily cause the heads 41 of the two pen tips 4 to be compressed and deformed to a greater extent, potentially exceeding the elastic deformation range and causing damage, thus affecting the drawing and writing effects.

[0053] Of course, in some embodiments of the present invention, a window 56 may be provided on only one of the plug-in tubes 58 to form the deformation portion 50, and the other plug-in tube 58 may not have a window 56 design. By reasonably designing the deformation amount of the deformation portion 50, that is, the expansion and contraction amount of the ink mixer 5, the ink mixing and color changing function can also be achieved.

[0054] Furthermore, the ink mixer 5 is provided with a fifth annular rib 53 on its inner surface near the first step 55. In the original assembled state, the fifth annular rib 53 forms a transitional fit with the second annular rib 21 at the front end of the pen barrel 2. Simultaneously, the second step 27 formed at the intersection of the middle section 23 and the upper section 24 of the pen barrel 2 precisely abuts the end surface of the ink mixer 5. Furthermore, the regular polygonal middle section 23 of the pen barrel 2 and the insertion tube 58 of the ink mixer 5 coincide with each other, with a slight clearance, forcing both markers to be positioned axially and radially.

[0055] In addition, the openings at both ends of the ink mixer 5 are chamfered 54 to facilitate the insertion of a marker pen.

[0056] See Figure 2 、 Figure 12 and Figure 13The present rotary color-changing, double-barrel, double-ended marker also includes a pen cap 6 , which is hollow and open at both ends. It is typically made of transparent PP injection molding. The pen cap 6 fits over the ink mixer 5 . The inner wall of the pen cap 6 is designed with two first annular ribs 61 . A first step 55 located at the adjacent ends of the two connecting tubes 58 extends radially outward to protrude from the outer surface of the connecting tubes 58 . The two first annular ribs 61 form a one-to-one transitional fit with the two first steps 55 to achieve axial positioning of the ink mixer 5 and the pen cap 6 .

[0057] See Figure 7 The ends of the two connectors 58, facing away from each other, are each provided with a plurality of ribs 51 evenly distributed along the circumference of their outer surfaces. These ribs 51 are spaced apart from the inner surface of the pen cap 6, facilitating elastic axial deformation of the ink mixer 5 when subjected to torque and reducing frictional resistance in all directions, resulting in a more comfortable feel. The pen cap 6 enhances the aesthetics of the rotary color-changing double-stem, double-ended marker and also serves as a guide for the elastic axial deformation of the ink mixer 5.

[0058] The working principle of the rotary color-changing double-rod double-headed marker pen of the utility model is as follows.

[0059] When the rotary color-changing double-barrel double-headed marker is in its original assembled state and is being used or re-mixed, both hands hold the single pen barrels 2 of different colors on both sides, and at the same time rotate them in opposite directions, i.e., one clockwise and the other counterclockwise, by a certain angle. The deformed portion 50 of the ink mixer 5 is twisted and elastically deformed along the axial direction under the action of the torque, so that the length of the ink mixer 5 is shortened, and the two markers of different colors approach each other along the axial direction, forcing the heads 41 of the two pen tips 4 to elastically contact each other and close together. At this time, since the fibers between the two pen tips 4 have the function of absorbing and guiding ink, it can be observed from the transparent windows of the ink mixer 5 and the pen cover 6 that the ink in each pen tip 4 penetrates into the other pen tip 4. After a period of mixing, since the ink in each pen tip 4 is formed by the mixture and diffusion of two inks, the torque is removed after a few seconds, and the two markers are taken out and used separately, so that mixed and gradient colors can be drawn or written, making the picture sense and color richer.

[0060] At this time, during the action of torque, the deformation part 50 is twisted and elastically deformed, so that the axial width of the window 56 is shortened, and the two sections of the limiting column 59 on both sides of the notch 52 slowly approach each other until the two stop surfaces 521 fit together and stop each other, thereby limiting the marker from rotating further, ensuring that the two pen tips 4 are elastically deformed and contacted with each other, and the heads 41 of the two pen tips 4 are not squeezed and damaged by each other due to excessive deformation, thereby playing the role of axial limitation and protection of the pen tips 4.

[0061] The rotary color-changing double-rod double-head marker is switched from a state of mixing ink with no gap between the two pen heads to an original assembly state with a gap between them, that is, after the two pen heads 4 mix the colors, the marker is taken out and used for painting or the like.

[0062] When the external torque is removed, the ink mixer 5 has no torque effect, and the deformed part 50 returns to the original assembly state under its own elastic force. The two nibs 4 retreat with the retreat of the pen shaft 2 until they return to the original assembly state with a gap when switching from the ink mixing state with no gap, completing a working cycle.

[0063] As long as torque is repeatedly applied to and removed from the two pen barrels 2 at the same time, the above-mentioned movements continuously complete the cycle of the two pen tips 4 moving from elastic contact with each other with a gap and without a gap along the axial direction, thereby meeting the functional requirements of the rotary color-changing double-barrel double-headed marker applied in the utility model, that is, completing the cycle of re-mixing the colors after the inks in the two pen tips 4 are used up.

[0064] It can be seen that the rotary color-changing double-rod double-headed marker of the present invention has made structural innovations to the traditional marker. By setting up two markers of different colors and an ink mixer 5, and providing a deformation part 50 on the ink mixer 5, when both hands hold the single markers of different colors on both sides and rotate them in opposite directions for a certain angle at the same time, the deformation part 50 is twisted and elastically deformed along the axial direction under the action of torque, so that the length of the ink mixer 5 is shortened, and the two markers of different colors approach each other along the axial direction, forcing the heads 41 of the two pen tips 4 to elastically contact each other and close together. At this time, since the fibers between the two pen tips 4 have the function of absorbing and guiding ink, the ink in each pen tip 4 penetrates into the other pen tip 4, and the ink changes color with each other, thereby making it possible to draw mixed and gradient gorgeous colors beyond the two pens, increasing the user's choice in the number of colors. At the same time, the present invention also provides a limiting column 59 with a notch 52 on the ink mixer 5. During the action of torque, the two stop surfaces 521 located on the notch 52 fit together and stop each other, thereby limiting the marker from rotating further, ensuring that the two pen tips 4 are elastically deformed and contacted with each other, and the heads 41 of the two pen tips 4 are not squeezed and damaged by each other due to excessive deformation, thereby playing the role of axial limitation and protection of the pen tips 4.

[0065] Compared with existing technologies, this utility model breaks through the traditional pattern, thinking mode, and structure of traditional markers, subverts the structural design of markers in the stationery industry, enhances the technical level and innovation capability of the industry, adds a sense of novelty to the marker mechanism, and provides people with a forward-looking and aesthetic enjoyment. It has the advantages of reasonable design, compact structure, novel and unique concept, easy processing and low cost, and convenient mass production. In particular, it greatly increases the demand of painting enthusiasts for the number and color of colors.

[0066] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A rotary color-changing double-rod double-headed marker pen, characterized in that: include: Two markers of different colors and an ink mixer (5), wherein the ink mixer (5) is in the shape of a hollow tube and is provided with a deformation portion (50) capable of generating elastic deformation; the rotary color-changing double-rod double-headed marker has two states, namely an original assembly state and an ink mixing state; in the original assembly state, the two markers are respectively inserted from the two ends of the ink mixer (5), and the pen tips (4) of the two markers are opposite to each other and do not contact each other; when a torsional force is applied to the two markers in opposite directions so that the two markers drive the two ends of the ink mixer (5) to rotate in opposite directions, the deformation portion (50) can be forced to twist and deform, thereby shortening the length of the ink mixer (5), so that the two pen tips (4) abut against each other to mix ink and color, and at this time, the rotary color-changing double-rod double-headed marker is in the ink mixing state.

2. The rotary color-changing double-rod double-ended marker according to claim 1, characterized in that: Both ends of the ink mixer (5) are provided with plug-in cylinders (58) for inserting the marker pen, and at least one of the plug-in cylinders (58) is provided with a plurality of windows (56) along a circumferential direction, and a connecting rib between two adjacent windows (56) forms the deformation portion (50).

3. The rotary color-changing double-rod double-headed marker according to claim 2, characterized in that: The plug-in cylinder (58) is located in the window (56) and is provided with a limit column (59) extending in the axial direction. The limit column (59) is provided with a notch (52), and two stop surfaces (521) spaced apart and opposite to each other are formed at the notch (52). The two stop surfaces (521) are used to stop each other in the ink mixing state to limit the stroke of the marker pen in the axial direction.

4. The rotary color-changing double-rod double-ended marker pen according to claim 2, characterized in that: The marking pen and the inner wall of the plug-in tube (58) are provided with circumferential positioning features. In the original assembly state and the ink mixing state, the marking pen is circumferentially positioned by the circumferential positioning features to limit the relative rotation of the plug-in tube (58) and the marking pen inserted therein in the circumferential direction.

5. The rotary color-changing double-barrel double-ended marker pen according to claim 2, characterized in that: A connecting tube (57) is provided in the middle of the ink mixer (5), and the connecting tube (57) is fixedly connected between the two plug-in tubes (58). In the ink mixing state, the two pen tips (4) abut against each other in the connecting tube (57) to mix ink and color.

6. The rotary color-changing double-rod double-headed marker pen according to claim 2, characterized in that: The invention also includes a pen cover (6), which is tubular and is mounted on the ink mixer (5); an annular first step (55) is provided on one end of the two connecting tubes (58) close to each other, and a first annular rib (61) is provided on the inner surface of the pen cover (6); the first step (55) and the first annular rib (61) are transitionally matched to achieve axial positioning of the ink mixer (5) and the pen cover (6).

7. The rotary color-changing double-rod double-ended marker according to claim 6, characterized in that: The other ends of the two plug-in tubes (58) that are away from each other are both provided with a plurality of convex ribs (51) uniformly distributed along the circumference on the outer surface thereof, and the plurality of convex ribs (51) are all in clearance fit with the inner surface of the pen cover (6).

8. The rotary color-changing double-rod double-ended marker pen according to claim 1, characterized in that: The two marking pens each comprise a tail plug (1), a pen body (2), a coiled core (3) and a pen tip (4); the pen body (2) is a cylindrical body with a certain wall thickness, which is hollow inside and has a stepped shape; the coiled core (3) is built into the pen body (2); the pen tip (4) is mounted on one end of the pen body (2) and inserted into the coiled core (3); the tail plug (1) is mounted on the other end of the pen body (2) and presses the coiled core (3); a second step (27) is provided on the pen body (2); in the original assembled state, the second step (27) abuts against the end face of the ink mixer (5).

9. The rotary color-changing double-rod double-ended marker pen according to claim 1, characterized in that: The ink mixer (5) is integrally injection-molded from a plastic material; and the pen tip (4) is processed and molded from a fiber material.

10. The rotary color-changing double-rod double-headed marker pen according to claim 1, characterized in that: In the original assembly state, the distance between the two pen tips (4) is 0.7 mm to 1 mm.

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