Structure of moving bodies in liquid
The liquid-moving body structure addresses the instability of background plates in conventional writing instruments by using locking parts to secure the background plate, ensuring stable and controlled float body movements, enhancing user experience through precise positioning and movement control.
Patent Information
- Application Number
- JP2026000206U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-01-25
- Publication Date
- 2026-03-23
- Estimated Expiration
- 2036-01-25
AI Technical Summary
Conventional writing instruments with internal liquid-moving bodies suffer from an unstable background plate position due to dimensional mismatches between the background plate and the main body, leading to potential misalignment and user discomfort.
A liquid-moving body structure with a transparent main body containing locking parts that secure a strip-shaped background plate and a float body, ensuring the background plate is fixed and positioned correctly, allowing for controlled movement of the float body within the transparent portion, with a movement time of 3 to 15 seconds.
The solution stabilizes the background plate's position, enabling visually appealing and enjoyable movements of the float body, enhancing user experience by maintaining the float's movement within a predetermined time frame and preventing rotation or misalignment.
Smart Images
Figure 0003255179000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a writing instrument, a key holder, a charm, and other structures with a moving decoration inside a liquid, in which a liquid is enclosed inside a transparent body.
Background Art
[0002] FIG. 16 is a configuration diagram showing an example of a conventional writing instrument. In this writing instrument 500, about half of the rear end side 51b of the main body 51 is transparent. Oil is enclosed inside this transparent portion 53, and a float body 7 with a picture or the like displayed inside the transparent interior 53 is placed. The oil is transparent and has a predetermined viscosity, and the float body 7 can move by gravity. A core such as a ballpoint pen is provided inside the tip side of the writing instrument 500.
[0003] A background plate 55 is provided in the longitudinal direction inside the transparent portion of the main body 51. The background plate 55 is disposed substantially at the center in the direction of the orthogonal cross section with respect to the longitudinal direction. Therefore, the inside of the cylindrical main body is divided into two sections in the longitudinal direction by the background plate 55. The float body 7 is a plate-like piece, and an arbitrary picture or the like is displayed on its surface. The float body 7 moves by its own weight along the longitudinal direction of the main body 51 in the oil. When the writing instrument 500 is stood upright, it descends along the background plate 55 by its own weight, and when it is turned in the opposite direction and stood upright, it descends in the opposite direction. Thus, by the movement of the float body 7, an arbitrary movement or story is expressed in correlation with the background plate 55.
[0004] For example, when a picture of the sea is displayed on the background plate 55 and a picture of a fish is displayed on the float body 7, by inverting the writing instrument 500 in the vertical direction, the float body 7 moves relatively slowly inside the main body due to the fluid resistance of the oil, thereby expressing a movement as if the fish is moving in the sea.
Prior Art Documents
Non-Patent Documents
[0005] [Non-Patent Document 1] AssistOn, [online], September 20, 2019, Internet <URL: https: / / www.assiston.co.jp / 3139> [Overview of the Initiative] [Problems that the invention aims to solve]
[0006] However, in the conventional writing instrument 500 described above, the background plate 55 is not fixed internally, so if there is a difference between the dimensions of the background plate 55 and the inner diameter of the main body 51, the position of the background plate 55 cannot be determined. This invention was made to solve this problem. [Means for solving the problem]
[0007] The liquid-moving body structure according to the present invention comprises a main body having a pen tip at its front end and a hollow cylindrical transparent portion with oil sealed inside at its rear end; a plurality of locking parts provided longitudinally on the inner surface of the transparent portion of the main body; a strip-shaped background plate positioned inside the transparent portion of the main body by the locking parts; and a float body disposed in the space formed between the background plate and the transparent portion of the main body. Preferably, the weight and shape of the float body are set in relation to the liquid inside so that the movement time from end to end within the transparent portion is 3 seconds or more and 15 seconds or less.
[0008] Furthermore, the background plate may be positioned at the locking portion and placed inside the transparent portion, and may be curved in the direction of the shorter side. [Brief explanation of the drawing]
[0009] [Figure 1] This is a front view showing a writing instrument according to Embodiment 1 of the present invention. [Figure 2] Figure 1 is a rear view of the writing instrument shown. [Figure 3] Figure 1 is a right side view of the writing instrument shown. [Figure 4]Figure 1 is a plan view of the writing instrument shown. [Figure 5] Figure 1 is a bottom view of the writing instrument shown. [Figure 6] Figure 1 is a partially broken diagram of a writing instrument. [Figure 7] Figure 1 is an assembly diagram of the writing instrument shown. [Figure 8] Figure 1 is a cross-sectional view of the writing instrument shown. [Figure 9] Figure 1 is an explanatory diagram illustrating the operation of the writing instrument shown. [Figure 10] This is an explanatory diagram showing a writing instrument according to Embodiment 2 of the present invention. [Figure 11] This is an explanatory diagram showing a writing instrument according to Embodiment 3 of the present invention. [Figure 12] This is an explanatory diagram showing a charm according to Embodiment 4 of the present invention. [Figure 13] Figure 13 shows the assembly diagram of the charm. [Figure 14] This is an explanatory diagram showing examples of a background plate and a float used in a liquid-moving body structure according to Embodiment 5. [Figure 15] This is a cross-sectional view showing a liquid-moving body structure according to Embodiment 6. [Figure 16] This is a diagram showing an example of a conventional writing instrument. [Modes for carrying out the invention]
[0010] FIG. 1 is a front view showing a writing instrument according to Embodiment 1 of the present invention. FIG. 2 is a rear view, FIG. 3 is a right side view, FIG. 4 is a plan view, and FIG. 5 is a bottom view. This writing instrument 100 is an example of a liquid internal moving body structure, and includes a main body 1 in which the rear end side 1a is transparent and a ball pen core is provided inside the front end side 1b, and a clip 2 provided at the rear end of the main body 1. The rear end side 1a of the main body 1 is a hollow cylindrical body, and the radial cross section is circular. The transparent portion 3 has substantially the same diameter. The front end side 1b is a hollow cylindrical body, and the diameter decreases toward the front end. Near the front end, spline-like processing is performed, and by rotating the front end, the tip of the internal ball pen protrudes (not shown). Since the structure of the front end side 1b is not the gist of the present invention, details are omitted.
[0011] The transparent portion 3 on the rear end side la of the main body 1 has a uniform diameter and is made of a clear resin. The internal space of the rear end side 1a is filled with oil, which is a liquid. The oil used is transparent and has a predetermined viscosity. Also, water may be used instead of the oil. On the inner surface of the transparent portion 3, small convex portions 4 serving as locking portions are provided in the longitudinal direction. As shown in FIG. 6, these convex portions 4 are provided at four locations alternately with a wide pitch and a narrow pitch. Although the cross section of the convex portion 4 is mountain-shaped, it is not limited to the same shape as long as the long side edge 5a of the background plate 5 can be positioned. For example, the cross section may be rectangular or concave.
[0012] FIG. 7 is an assembly view of this writing instrument. The background plate 5 is in the shape of a strip of a thin resin plate, and a predetermined picture is displayed on the surface. In the example of this figure, a picture of the sea is displayed. Next, the background plate 5 is inserted into the transparent portion 3. At this time, the long side edge 5a of the background plate 5 is positioned circumferentially between a pair of the convex portions 4 having a narrow pitch, and the position is approximately fixed inside the transparent portion 3. In this state, the background plate 5 is flat and has very little refraction, so it is easy to visually recognize the opposite side when it is transparent. Also, the background plate 5 does not rotate circumferentially. The width of the background plate y is smaller than the inner diameter of the transparent portion and larger than the opposing distance of the convex portions 4. [[ID=]10]
[0013] As shown in FIG. 8, the internal space of the transparent portion 3 is divided into two compartments by the background plate 5. Specifically, it is divided into a first space S1 and a second space S2 between the background plate 5 and the main body 1. Each compartment is filled with oil as described above.
[0014] A float body 7 is placed in the first space S1 of the transparent portion 3. The float body 7 is a small piece plate smaller than the background plate 5, and a picture is displayed on its surface. For example, a picture of a fish is displayed on the surface of the float body 7. The weight and shape of the float body 7 are set in relation to the internal liquid so that the moving time from end to end within the transparent portion is 3 seconds or more and 15 seconds or less. Preferably, it is 5 seconds or more and 10 seconds or less. For example, the inside is oil with a predetermined viscosity, and the shape of the float body 7 moving therein is rectangular with a predetermined thickness. Then, the moving time inside the oil is measured from the weight of the float body 7. Then, the shape and weight are determined so that the movement of the float body 7 takes a time that allows the user to enjoy the operation.
[0015] Next, a second float body 57 can also be placed in the second space S2 (the portion surrounded by the dotted line in the figure is a modification of the first embodiment). Since the volume of the second space S2 is also stable for the second float body 57, it has the same effect as the float body 7. That is, since the background plate 5 is fixed by the convex portion 4, it does not rotate or move inside, so the volumes of the first space S1 and the second space S2 are constant and the positional relationship with respect to the main body 1 is fixed. When a predetermined design is applied to the transparent portion of the main body 1, the position of the background plate 5 does not shift, so there is no sense of discomfort during use. If the weight of the second float body is different from that of the float body 7, the moving speed when the main body 1 is placed upright in the vertical direction changes, so a wide range of expressions can be achieved in relation to the background plate 5 and the float body 7.
[0016] When the background plate 5 is arranged in the internal space of the transparent portion 3 without being curved and the background plate 5 is transparent, the float body 7 and the second float body 57 can be visually recognized without being enlarged or reduced through the background plate 5.
[0017] Figure 9 is an explanatory diagram showing the operation of the writing instrument of the present invention. As shown in Figure 9(a), when the rear end 1a is facing upwards, the float body 7 inside the transparent part 3 slowly descends due to its own weight while being subjected to the fluid resistance of the oil. At this time, since the float body 7 is in the first space S1, it moves approximately parallel to the background plate 5. Next, as shown in Figure 9(b), when the pen is inverted so that the front end 1b is facing upwards, the float body 7 inside the transparent part 3 slowly descends due to its own weight in the direction of the rear end 1b while being subjected to the fluid resistance of the oil. At this time as well, since the float body 7 is in the first space S1, it moves approximately parallel to the background plate 5. Since the background plate 5 is positioned by the protrusion 4, there is no change in the first space S1 even when it moves inside the main body 1, so stable movement of the float body 7 can be achieved.
[0018] Furthermore, since the float 7 is set to move over a predetermined period of time, users can enjoy visually observing its movement. If the movement time is too slow or too fast, users will not be able to enjoy the movement of the float 7. Therefore, as described above, the movement time from one end of the transparent section to the other is set to be between 3 seconds and 15 seconds. For example, if there are constraints on the shape and size of the float 7, the movement time can be set by adjusting its thickness, or by changing its material or weight.
[0019] (Embodiment 2) Figure 10 is an explanatory diagram showing a writing instrument according to Embodiment 2 of the present invention. This writing instrument 200 has substantially the same configuration as Embodiment 1, but the mounting configuration of the background plate 25 is different. The other configurations are the same as Embodiment 1, so their explanation will be omitted. The background plate 25 is placed between the wide-pitched protrusions 4. At this time, the dimensions of the short side of the background plate 25 are set to curve gently, and it is inserted into the internal space.
[0020] The long edge 25a engages with the protrusion 4, thereby fixing the background plate 25. Due to its slight curvature, the scenery behind the float 7 appears unique, creating a distinct space. In the fixing configuration shown in Figure (a), the volume of the first space S1 increases, allowing the float 7 to move freely not only in the longitudinal direction but also in the radial direction, thus enabling the float 7 to be configured to have such movement.
[0021] Furthermore, as shown in Figure (b), the background plate 25 is locked between the narrow pitches of the protrusions 4, the dimensions of the short side of the background plate 25 are set to curve gently, and it is inserted into the internal space. In this case, the first space S1 becomes narrower, which restricts the movement of the float body 7, and this configuration is suitable when restricted movement is required.
[0022] As shown in Figure (c), if the first space S1 is curved in the opposite direction to that in case (b), the movement of the float 7 can be further restricted.
[0023] (Embodiment 3) Figure 11 is an explanatory diagram showing a writing instrument according to Embodiment 3 of the present invention. This writing instrument 200 has substantially the same configuration as Embodiment 1, but as shown in Figure (a), it has two protrusions 4. The protrusions 4 are provided at 180-degree intervals in the circumferential direction of the cross-section. The background plate 35 is inserted and positioned inside so as to engage with these protrusions 4. As shown in the figure, the long edge 35a of the background plate 35 is engaged with the protrusions 4, fixing the position of the background plate 35. This stabilizes the first space S1 in which the float body 7 is placed, eliminating any misalignment with the design of the transparent portion 3.
[0024] Furthermore, as shown in Figure (b), the protrusions 4 may be positioned to one side. That is, the spacing of the protrusions 4 on the first space S1 side and the spacing of the protrusions 4 on the second section S2 side are configured to be different. By inserting the background plate 5 into the side with the narrower spacing of the protrusions 4, both of its edges 5a are restricted and positioned by the protrusions 4. By placing the float body 7 into the first space S1, which has a narrower cross-sectional area, it becomes possible to move in a stable position. Visually, the float body 7 is positioned closer to the surface of the transparent part 3, making it easier to see.
[0025] Similarly, a second float 57 can be placed in the second space S2 (the area enclosed by the dotted line in the figure is a modified version of Embodiment 1). In this case, since the volume of the second space S2 increases, a larger float can be placed inside. Changing the size changes the movement speed of the float, allowing the user to enjoy two different types of movement.
[0026] Furthermore, as shown in Figure (c), the protrusion 4 can be limited to one. In this case, the background plate 5 can be prevented from rotating in the circumferential direction. Also, because there are fewer protrusions 4, it appears as a uniform cylindrical shape when viewed through, resulting in a better appearance. The float body 7 is placed in the first space S1. As described above, a second float body 57 may also be placed.
[0027] (Embodiment 4) Figure 12 is a plan view showing a charm according to Embodiment 4 of the present invention. Figure 13 is an explanatory diagram of the assembly of the charm shown in Figure 12. This charm is an example of a liquid-moving body structure, in which the transparent portion according to Embodiments 1 to 3 above is configured as a charm. A charm is a small, decorative attachment used by being attached to keychains, accessories, bags, etc.
[0028] The figure shows an example of a charm, in which a transparent portion 203 is provided on one end of the main body 201, and oil or other liquid is sealed inside this transparent portion 203, along with a background plate 5 and a float body 7. The background plate 5 is positioned by a protrusion 4. The internal structure of the transparent portion 203 is the same as in embodiments 1 to 3 described above, so a description is omitted.
[0029] The main body is equipped with a keychain. Although it is a keychain, its usage is the same as that of the writing instrument shown in Figure 9. Furthermore, its function and effect are the same as those of Embodiments 1 to 3.
[0030] (Embodiment 5) The float body 7 is not limited to a strip shape. Figure 14 is an explanatory diagram showing an example of a background plate and a float body used in a liquid-moving body structure according to Embodiment 5. As shown in Figure 14(a), the central part of the background plate 5 may be constricted. The float body 7 may also be a rectangular transparent or translucent plate with a desired pattern printed on it. Furthermore, as shown in Figure 14(b), the background plate 5 may be strip-shaped with a punched-out space 9 formed in a part of it. In the example shown in Figure 14(b), a circular hole is provided in the background plate 5. In this configuration, even if the background plate 5 is opaque, the opposite side can be seen through the space 9. Furthermore, as shown in Figure 14(c), a space 9 large enough for the float body 7 to pass through may be provided in the center of the background plate 5. In this way, the user can move the float body 7 from the first space S1 to the second space S2 and enjoy it in both. In all cases, positioning is achieved by the long edge 5a contacting the convex portion 4.
[0031] (Embodiment 6) Figure 15 is a cross-sectional view showing a liquid-moving body structure according to Embodiment 6. In this configuration, the background plate is omitted, and guide rails are formed by protrusions 4. A float body 7 is inserted between these guide rails and moves along the guide rails. The float body 7 is preferably in the shape of a strip, with its long edge 5a fitting between the protrusions 4, which act as guides for movement. The protrusions 4 are formed to be relatively large, but since they are transparent like the transparent portion 3, a decrease in visibility is suppressed.
[0032] In this configuration, the edges on both sides of the float body 7 are sized so that they do not come into contact with the inner wall of the transparent portion 3. Since the protrusion 4 has a V-shaped cross-section, it is difficult for it to face the float body 7 directly, and therefore fluid resistance in this portion is low. Also, since it moves using the protrusion 4 as a guide, the length of the strip-shaped portion is ensured to prevent it from coming off the guide rail. It is preferable to round the corners of the float body 7 to prevent snagging (see the same figure). This also contributes to reducing fluid resistance. With this configuration, the overall structure becomes simpler. [Explanation of symbols]
[0033] 100 writing instruments 1 Main unit 2 clips 3 Transparent part 5 Background board 7 Float 200 Charms
Claims
1. A body that is hollow and cylindrical, with a transparent section containing oil, water, or other liquids, A locking portion is provided longitudinally on the inner surface of the transparent part of the main body, A background plate is positioned circumferentially by the locking portion and placed inside the transparent portion of the main body. A float body is disposed in the space formed between the background plate and the transparent portion of the main body and is movable within the liquid, A liquid-moving body structure equipped with the following features.
2. The liquid-moving body structure according to claim 1, wherein the float body has a structure in which its weight and shape are set in relation to the liquid inside such that the time it takes to move from one end to the other within the transparent portion is 3 seconds or more and 15 seconds or less.
3. Furthermore, the liquid-moving body structure according to claim 1, wherein the background plate is positioned at the locking portion and is curved in the short-side direction while being placed inside the transparent portion.