Writing instrument
By introducing a strut and an internally raised support design into the writing instrument, combined with the cooperation of rotating and guiding elements, the problem of ink deposition when the felt tip changes color is solved, achieving a compact structure and pure color in the writing instrument.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 马培德
- Filing Date
- 2025-05-15
- Publication Date
- 2026-06-12
AI Technical Summary
When the color of a three- or four-color felt-tip pen changes, the felt tip may press against the inner wall of the pen body and deposit ink, causing the colors to alter each other. This is especially risky in compact writing instruments or wide-core pens.
A writing device is designed in which the support of the writing core has a strut and an internal bulge. When the strut is in the retracted position, it rubs against the inner wall of the main body to keep the tip and the main body apart and prevent ink deposition. At the same time, a rotating element and a complementary guiding element cooperate to ensure that the writing cores are pushed forward and retracted one by one to avoid contact with each other.
It effectively prevents ink deposition on the inner wall of the writing instrument and color migration between adjacent cores, maintaining the compact structure and pure color of the writing instrument.
Smart Images
Figure CN224348644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a writing device, which includes at least two writing cores, which can be in the writing position or the retracted position respectively. Background Technology
[0002] A three- or four-color felt-tip pen is known, which includes a rotatable element mounted at the rear end of the body. Rotation of this element can cause each felt tip to advance or retract within its body, in order to select a color output for writing or coloring, or to retract all felt tips.
[0003] One drawback is that when the color changes, as the felt tip is advanced and then retracted into the body, it may press against the inner wall of the body and deposit ink along it. Then, as the color continues to change, the deposited color may transfer to the top of other felt tips. Therefore, the colors of the felt tips of a writing instrument can potentially alter each other. This risk is increased in compact writing instruments where the writing leads are very close together, or in writing instruments that house pens with wide-lead pens. Utility Model Content
[0004] One of the objectives of this invention is to provide a writing instrument that at least partially solves the shortcomings of the prior art and has a compact structure.
[0005] Therefore, the subject of this utility model is a writing instrument, which includes:
[0006] -Main body (trunk, barrel), which has an outlet hole at the front end.
[0007] - At least two, for example four, writing leads are housed within the main body. Each writing lead has an ink reservoir, a tip at the front end, and a support (support) including a porte-mine for holding the tip. The support is also configured to receive the ink reservoir.
[0008] - A rotating element mounted on the rear end of the main body, the rotating element and the writing core including complementary guide elements, the guide elements being configured such that rotation of the rotating element can advance each writing core in the main body one by one into the writing position, characterized in that the movable core frame of the support has at least one corresponding strut (cross brace, spacer) that protrudes laterally (sideways) from the front end of the movable core frame, thereby maintaining the spacing between the tip of the writing core and the main body when the writing core is in the retracted position and during the transition of the writing core from the retracted position to the writing position.
[0009] When moving from the retracted position to the writing position to select a color, the at least one support rubs against the inner wall of the body, keeping the tip away from the body. This prevents the tip of the writing refill from contacting or minimally contacting the wall of the body. Thus, when the user changes the color, it prevents the inner side of the body from being stained and migrating into the tip of adjacent writing refills.
[0010] Writing instruments may also have one or more of the following features, which may be applied individually or in combination.
[0011] The movable core frame of the support has, for example, two corresponding struts formed by parallel longitudinal ribs.
[0012] The support members of the at least two writing cores each include at least one internal bulge configured to keep the writing cores spaced apart from each other in the retracted position.
[0013] The internal bulge can be obliquely cut in the longitudinal direction.
[0014] The outlet hole has, for example, four mutually perpendicular planar edges.
[0015] Writing instruments include, for example, four writing cores.
[0016] The edge of the outlet hole may have its own longitudinal ribs, which are arranged in pairs facing each other. Each longitudinal rib is configured to be inserted between the struts of the support of one of the four writing cores that has been pushed into the writing position.
[0017] The two longitudinal ribs adjacent to the longitudinal ribs of the outlet hole and the strut of the support member of the writing core being pushed to the writing position can form a guide rail for at least one internal bulge of the support member.
[0018] For example, the support includes a plug (end cap) at its rear end, which includes a guide tail (tail guide) that is offset relative to the axis of the writing core and engages with a corresponding guide rod of the body to guide the movement of the writing core between the writing position and the retracted position.
[0019] The writing instrument may include a spring for each writing core, which is arranged on the guide rod between the guide tail and the body and drives the writing core toward the retracted position.
[0020] According to one embodiment, the rotating element includes a selector and a column assembled together, and the writing instrument includes a first sealing device inserted between the column and the selector and a second sealing device inserted between the column and the body, the first and second sealing devices being longitudinally spaced apart from each other.
[0021] The first sealing device is, for example, an annular protrusion integral with the column or selector.
[0022] The second sealing device is achieved, for example, by an O-ring inserted between the annular wedge surface of the column and the shoulder of the rear end portion of the body.
[0023] According to an exemplary embodiment, the complementary guiding element includes a cam-shaped member carried by a rotating element, which cooperates with a complementary positioning finger (indexing finger, finger-shaped positioning member, finger-shaped indexing member), which is carried by corresponding supports of the at least two writing cores.
[0024] According to one embodiment, the cam forming component includes:
[0025] - An extension ramp (slope) engages with the positioning finger during the rotation of the rotating element, thereby causing the writing core to gradually extend from the retracted position to the writing position.
[0026] - The shoulders and ridges that connect with the extension ramp, which cooperate with the positioning fingers to stop and hold the writing core in the writing position, and
[0027] - A disengagement portion (misalignment portion) that connects to the raised section engages with the positioning finger when the rotating element rotates, thereby causing the writing core to be released from the writing position and returned to the retracted position.
[0028] The cam forming component may also include an upper annular stop, which, when the rotating element rotates, engages with a positioning finger to hold the writing core in the retracted position. Attached Figure Description
[0029] Other advantages and features will become clear from the following description of a specific embodiment of the present invention, which is non-limiting and is made in conjunction with the accompanying drawings. In the drawings:
[0030] Figure 1 A perspective view of the writing instrument is shown;
[0031] Figure 2 It shows Figure 1 A cross-sectional view of a writing instrument, with the writing core in the retracted position;
[0032] Figure 3A It shows Figure 2 A side perspective view of the writing core of a writing instrument;
[0033] Figure 3B It shows Figure 3A The writing core is basically a frontal perspective view;
[0034] Figure 4 It shows Figure 3A and Figure 3B An enlarged view of the front end of the writing core;
[0035] Figure 5 Showing what is seen from the backend Figure 2 Components of writing instruments;
[0036] Figure 6 It shows Figure 2 A longitudinal cross-sectional view of the main body of the writing instrument;
[0037] Figure 7 It shows Figure 2 A perspective view of the selector of the rotating element of a writing instrument;
[0038] Figure 8 It shows Figure 2 A partial cross-sectional view of a writing instrument, with the writing core in the writing position;
[0039] Figure 9 It shows Figure 8 A magnified view of a portion of the image;
[0040] Figure 10 It shows Figure 2 The front end of a writing instrument, in which the writing core is in the writing position;
[0041] Figure 11 It shows the removal of the main body, Figure 10 Writing instruments;
[0042] Figure 12 A cross-sectional view of the front end of the writing instrument is shown, with all writing cores in the retracted position;
[0043] Figure 13 It shows the relationship with Figure 12 A similar view, in which the writing core is moving from the retracted position to the writing position;
[0044] Figure 14 The writing position is shown. Figure 13 Writing instruments;
[0045] Figure 15 It shows the relationship with Figure 3A A similar view is used to show another embodiment of the writing core.
[0046] In these figures, the same elements have the same reference numerals. Detailed Implementation
[0047] The following are some embodiments. Although the description relates to one or more embodiments, this does not necessarily mean that every reference numeral refers to the same embodiment, or that a feature applies only to one embodiment. Simple features of different embodiments may also be combined or interchanged to provide other embodiments without departing from the scope of the invention as defined by the claims.
[0048] Writing instruments can be used for writing, drawing, painting, or coloring on any writing support. The term "writing" refers to the process of creating marks by depositing ink, particularly for writing, drawing, painting, or coloring.
[0049] The front end of a writing instrument is defined as the tip side (used for writing). The rear end is the end opposite to the tip.
[0050] The longitudinal direction is defined as the main direction in which the writing instrument extends.
[0051] Figure 1 and Figure 2 An example of writing instrument 1 is shown.
[0052] The writing instrument 1 includes a body 2, at least two—for example, three or four—writing cores 4 housed in the body 2, and a rotating element 5 mounted on the rear end of the body 2.
[0053] The writing instrument 1 may include a removable cap 8, which can be clipped onto the front end of the body 2 to close the outlet hole 6.
[0054] The main body 2 of the writing instrument 1 includes a cylindrical body, the front end of which opens outward through an outlet hole 6, through which the lead core of the tip 7 of the writing core 4 can pass.
[0055] The writing core 4 of the writing instrument 1 is arranged longitudinally within the body 2 and is parallel to the body when in the retracted position. The writing core 4 can be a highlighter, a broad-tipped pen, or a fine-tipped felt pen. They can all be of the same structure but can be different colors.
[0056] As from Figure 3A As can be seen better in the example, each writing core 4 has an ink reservoir 9, a tip 7 on the front end side, and a support 10 that supports the tip 7 and is configured to receive the ink reservoir 9.
[0057] The support member 10 includes a movable core frame 11 for holding the tip 7, and a filter holder 12 for holding the ink reservoir 9 formed by the ink filling filter. The support member 10 also includes a plug 13 located at the rear end of the support member 10. The support member 10 is, for example, a single piece made of a plastic material.
[0058] The movable core holder 11 is cylindrical and houses the tip 7, which protrudes at the front to form a lead core and at the rear to be inserted into the filter of the ink reservoir 9. The filter of the ink reservoir 9 is axially held between the rear of the tip 7 and the tip of the plug 13 of the support member 10.
[0059] In this example, the filter holder 12 has an arcuate portion that partially surrounds the filter of the ink reservoir 9, and the filter holder 12 extends along the filter of the ink reservoir 9 from the movable core frame 11 to the stopper 13. Due to the diameter of the filter and the tip 7 of the ink reservoir 9, the diameter of the arcuate section of the filter holder 12 is larger than the diameter of the movable core frame 11.
[0060] According to an exemplary embodiment, the plug 13 of the support 10 includes a guide tail 14. The guide tail 14 is offset relative to the axis of the writing core 4. The guide tail 14 has a longitudinally extending through-hole and interacts with a corresponding guide rod 15 of the body 2. Figure 5 and Figure 6 Guide rods 15 extend longitudinally along the body of the main body 2, substantially parallel to the axis of the writing core 4, to guide the writing core 4 between the writing position and the retracted position. The number of guide rods 15 is the same as the number of writing cores 4.
[0061] The writing device 1 may include a spring 16 for each writing core 4 to return the writing core 4 to a retracted position. The spring 16 is, for example, arranged on a guide rod 15, inserted and abutting between the guide tail 14 of the support member 10 and a stop of the body 2, the stop being formed, for example, by the end of a rib connecting the guide rod 15 to the body 2. The spring 16 pushes the writing core 4 to the retracted position, offset relative to the axis of the writing core 4, thereby making the writing device 1 more compact.
[0062] The rotating element 5 and the writing core 4 include complementary guiding elements configured such that rotation of the rotating element 5 alternately pushes each writing core 4 toward the writing position.
[0063] According to an exemplary embodiment, the complementary guiding element is constituted by a cam-forming member 17 supported by a rotating element 5, the cam-forming member cooperating with a complementary positioning finger 18, the positioning finger being supported by corresponding supports 10 of at least two writing cores 4. The cam-forming member 17 is, for example, supported by a selector 19 of the rotating element 5. Figure 7 The positioning finger 18 is supported, for example, by the plug 13 of the support member 10. Figure 3A ).
[0064] Alternatively, the positioning finger 18 can be designed to protrude radially outward from the body 2 through the longitudinal groove 20 passing through the body 2, specifically for maintaining the writing core 4 in its longitudinal position within the body 2 when the rotating element 5 rotates. Figure 5 ).
[0065] As in Figure 7 As can be seen, the cam-shaped component 17 includes, for example:
[0066] - The extension ramp 17a, which engages with the positioning finger 18 during the rotation of the rotating element 5, so that the writing core 4 gradually unfolds from the retracted position to the writing position.
[0067] - Shoulders 17b and ridges 17c, which connect with the extending bevel 17a, and which, in conjunction with the positioning finger 18, stop and hold the writing core 4 in the writing position, thus forming a hard point for the user, and
[0068] - The disengagement part 17d is connected to the protrusion 17c and engages with the positioning finger 18 when the rotating element 5 rotates so that the writing core 4 is released from the writing position to the retracted position.
[0069] The cam forming part 17 also includes an upper annular stop 17e, which, when the rotating element 5 rotates, engages with the positioning finger 18 to keep the writing core 4 in the retracted position.
[0070] The cam-shaped element 17 allows the writing core 4 to unfold in a single rotational direction. The cam-shaped element 17 occupies less space than the V-shaped element, that is, it includes a gradually unfolding ramp followed by a gradually retracting ramp, thereby allowing the rotating element 5 to unfold and retract in two rotational directions.
[0071] According to one embodiment, the rotating element 5 is formed of two parts. It includes a selector 19 and a column 25, which are assembled to each other, for example, in a detachable manner—for example, by snap-fit—at the clip 26 of the selector 19.
[0072] The writing instrument 1 may also include a first sealing device 27 inserted between the post 25 and the selector 19. Figure 8 and 9 The first sealing device 27 may be formed by an annular flange integrally formed with the column 25 or the selector 19, and allows for edge-to-edge sealing.
[0073] The writing instrument 1 may include a second sealing device 28 inserted between a post 25 and a body 2. The first and second sealing devices 27, 28 are longitudinally spaced apart from each other. The second sealing device 28 may be implemented by an O-ring disposed below a shoulder at the rear end of the body 2, the post 25 having an annular wedge surface (chamfered) to allow compression of the O-ring. During installation, the O-ring is first compressed by sliding along the body 2 from the front end until the post 25 abuts against the O-ring, and then fitting a selector 19 onto the post 25 by inserting it at the rear end.
[0074] This sealing of the rotating element 5 is important for preventing the filter of the ink reservoir 9 of the writing refill 4 from drying out. Furthermore, the assembly system prevents the rotating element 5 from being pulled off from the rear, especially by young children. Therefore, it allows for simple yet robust assembly while limiting the number of parts.
[0075] According to one embodiment, the rotating element 5—more specifically, the selector 19—includes a central pillar 29 extending longitudinally between the writing reels 4 to prevent them from contacting each other. Figure 2 and 7 The plugs 13 may also each have a boss 30, which is configured as the central support 29 of the frictional rotating element. Figure 5 The boss 30 allows for limited contact between the support member 10 and the rotating element 5.
[0076] The plug 13 may also include a corresponding radial filling forming portion, here a tip protrusion 31, so that it can occupy radial space in the retracted position. Figure 5 )
[0077] like Figure 3B and Figure 4 As shown, the movable core frame 11 of the support member 10 has at least one corresponding strut 21a, 21B that extends laterally at the front end of the movable core frame 11. In this embodiment, the strut is formed by small longitudinal ribs. Laterally refers to the longitudinal direction of the movable core frame 11.
[0078] The at least one support rod 21a, 21b extends a short distance along the movable core frame 11 from the end of the support member 10—in this case, the end of the movable core frame 11. The at least one support rod 21a, 21b is configured to maintain the gap between the tip 7 of the writing core 4 and the body 2 when the writing core 4 is in the retracted position and during its movement from the retracted position to the writing position.
[0079] The leading edges of at least one support rod 21a, 21b are preferably rounded so that the at least one support rod 21a, 21b can contact the inner wall of the main body 2 during the movement from the retracted position to the writing position.
[0080] The movable core frame 11 of the support member 10 has, for example, two struts 21a and 21b formed by parallel longitudinal ribs, the longitudinal ends of which are flat and define the same plane. These flat longitudinal ends point outward from the movable core frame 11. Figure 11 ), so that it can contact the wall (especially the flat wall) of the main body 2 in the retracted position. Figure 12 ), and during the process of moving from the retracted position to the writing position ( Figure 13 ) and in the writing position ( Figure 10 and Figure 14The wall of the outlet hole 6 is in contact with the outlet hole.
[0081] When changing from the retracted position to the writing position ( Figure 12 , 13 (14) During the process of selecting a color, the at least one support rod 21a, 21b rubs against the inner wall of the body 2 to keep the tip 7 away from the body 2, so that the tip 7 of the writing core 4 does not contact or has very little contact with the wall of the body 2. This prevents the interior of the body 2 from being stained by the pen core and from migrating into the tip 7 of adjacent writing cores 4 when the user changes the color.
[0082] According to one embodiment, the movable core frame 11 of the support member 10 of at least two writing cores 4 further includes at least one internal bulge 22, which is configured to keep the writing cores 4 away from each other in the retracted position.
[0083] The internal bulge 22 is arranged, for example, opposite to the at least one support rod 21a, 21b. In the case where the writing instrument 1 has four writing cores 4, the internal bulge 22 is formed, for example, by two small flaps extending on both sides of the movable core frame 11 and capable of triangular engagement. The lateral ends of the internal bulge 22 form stops for the lateral ends of adjacent internal bulges 22. Multiple—particularly four—writing cores 4 can thus be held side-by-side in the retracted position with a small volume, without the tips 7 contacting each other.
[0084] The internal ridge 22 can be chamfered in the longitudinal direction so that it does not engage with the ridges 22 of other writing cores 4 when it changes from the writing position to the retracted position, thus improving the smoothness of operation.
[0085] according to Figure 10 In the exemplary embodiment visible in the image, the outlet hole 6 has four planar edges perpendicular to each other. The square cross-section of the outlet hole 6 provides more space for the pen refill 4, especially for highlighters. The risk of collision with the planar boundary of the highlighter refill is reduced, thereby preventing damage to the tip 7 and staining of the outlet hole 6, and thus preventing color migration between the pen refills 4.
[0086] According to one embodiment, when the writing instrument 1 includes four writing cores 4, each planar edge of the outlet hole 6 has longitudinal ribs 23a, 23b, 23c, and 23d. These longitudinal ribs 23a, 23b, 23c, and 23d are arranged in pairs opposite to each other. These longitudinal ribs 23a, 23b, 23c, and 23d are, for example, arranged at the center of each edge. Therefore, the cross-section of the outlet hole 6 is, for example, a square shape with rounded corners, wherein the longitudinal ribs 23a, 23b, 23c, and 23d are arranged at the center of each edge.
[0087] Longitudinal ribs 23a, 23b, 23c, and 23d are each configured to be inserted between struts 21a and 21b of the support member 10, which is advanced to the writing position. Two longitudinal ribs adjacent to the longitudinal ribs of the outlet hole located between the struts 21a and 21b of the support member 10, which is advanced to the writing position, can form a guide rail for at least one internal ridge 22 of the support member 10 for advancing the writing core 4 to the writing position.
[0088] These longitudinal ribs 23a, 23b, 23c, and 23d thus guide, center, and retain the writing core 4 in the writing position.
[0089] Therefore, the struts 21a, 21b and the internal bulge 22 enable the writing core 4 to be centered in the retracted position, guide and fix the writing core 4 in the writing position, and fix and maintain the writing position.
[0090] The diameter of the writing core 4 is limited by providing guidance at the rear end of the support member 10 using the guide tail 14 and guide rod 15, and at the front end using the struts 21a, 21b and the internal bulge 22.
[0091] Therefore, the writing core 4 can be relatively thin, almost as wide as the filter of the ink reservoir 9, thus resulting in a compact writing instrument 1, even in the case of a highlighter.
[0092] Figure 15 Another embodiment of the writing core 4 is shown.
[0093] In this embodiment, the ink reservoir 9 is composed of liquid ink in direct contact with the tip 7 (without a filter). The support member 10 forms a container for the ink reservoir 9. The diameter of the cylindrical section of the support member 10 between the movable core 11 and the stopper 13 can be enlarged relative to the diameter of the movable core 11 to receive ink.
[0094] The other features of this embodiment are the same as those of the foregoing embodiments.
Claims
1. A writing instrument (1), comprising: - Body (2), which has an outlet hole (6) at the front end. - At least two writing cores (4) are housed in the body (2), each writing core (4) having an ink reservoir (9), a tip (7) located at the front end, and a support (10) including a movable core holder (11) for holding the tip (7), the support (10) also being configured to hold the ink reservoir (9). - A rotating element (5) mounted on the rear end of the body (2), the rotating element (5) and the writing core (4) including complementary guiding elements configured such that rotation of the rotating element (5) can sequentially advance each writing core (4) in the body (2) to the writing position, characterized in that the movable core frame (11) of the support member (10) has at least one corresponding strut (21a, 21b) that protrudes laterally at the front end of the movable core frame (11) to maintain the spacing between the tip (7) of the writing core (4) and the body (2) when the writing core (4) is in the retracted position and during the transition of the writing core from the retracted position to the writing position.
2. The writing instrument (1) according to claim 1, characterized in that, The movable core frame (11) of the support member (10) has two corresponding struts (21a, 21b) formed by parallel longitudinal ribs.
3. The writing instrument (1) according to claim 2, characterized in that, The movable core frame (11) of the support member (10) of the at least two writing cores (4) each includes at least one internal bulge (22) configured to keep the writing cores (4) at a distance from each other in the retracted position.
4. The writing instrument (1) according to claim 3, characterized in that, The internal bulge (22) is obliquely cut in the longitudinal direction.
5. The writing instrument (1) according to any one of claims 3 to 4, characterized in that, The outlet hole (6) has four mutually perpendicular planar edges.
6. The writing instrument (1) according to claim 5, characterized in that, The writing instrument (1) includes four writing cores (4), the edge of the outlet hole (6) having its own longitudinal ribs (23a, 23b, 23c, 23d), these longitudinal ribs (23a, 23b, 23c, 23d) arranged in pairs facing each other, each longitudinal rib (23a, 23b, 23c, 23d) being configured to be inserted between the struts (21a, 21b) of the support member (10) of one of the four writing cores (4) that has been advanced to the writing position, the two longitudinal ribs adjacent to the longitudinal ribs of the outlet hole (6) and the struts (21a, 21b) of the support member (10) of the writing core (4) that has been advanced to the writing position form a guide track for the at least one internal bulge (22) of the support member (10).
7. The writing instrument (1) according to any one of claims 1 to 4, characterized in that, The support (10) includes a plug (13) at its rear end, which includes a guide tail (14) that is offset relative to the axis of the writing core (4) and engages with a corresponding guide rod (15) of the body (2) to guide the movement of the writing core (4) between the writing position and the retracted position.
8. The writing instrument (1) according to claim 7, characterized in that, The writing instrument includes a spring (16) for each writing core (4), which is arranged on the guide rod (15) between the guide tail (14) and the body (2) and pushes the writing core (4) toward the retracted position.
9. The writing instrument (1) according to any one of claims 1 to 4, characterized in that, The rotating element (5) includes a selector (19) and a column (25) assembled together. The writing instrument (1) includes a first sealing device (27) and a second sealing device (28). The first sealing device is inserted between the column (25) and the selector (19) and is formed by an annular protrusion integral with the column (25) or the selector (19). The second sealing device is formed by an O-ring inserted between an annular wedge surface of the column (25) and a shoulder at the rear end of the body (2). The first sealing device (27) and the second sealing device (28) are spaced apart from each other in the longitudinal direction.
10. The writing instrument (1) according to any one of claims 1 to 4, characterized in that, The complementary guiding element includes a cam-shaped member (17) carried by a rotating element (5), which engages with complementary positioning fingers (18) carried by the respective supports (10) of the at least two writing refills (4). The cam-shaped member (17) includes an extension ramp (17a), a shoulder (17b) and a ridge (17c) connected to the extension ramp (17a), and a disengagement portion (17d) connected to the ridge (17c). The extension ramp engages with the positioning fingers (18) during rotation of the rotating element (5) to gradually extend the writing refill (4) from the retracted position to the writing position. The shoulder and the ridge engage with the positioning fingers (18) to stop and hold the writing refill (4) in the writing position. The disengagement portion engages with the positioning fingers (18) during rotation of the rotating element (5) to release the writing refill (4) from the writing position back to the retracted position.