Rod-shaped extension holder

Abstract

This invention provides a rod-shaped extension holder that allows for easy attachment and detachment of miniaturized rod-shaped objects such as brushes. [Solution] The rod-shaped extension holder 1 consists of a cylindrical shaft 2 with one end open and an attachment 4 that connects a rod-shaped object, such as a brush 3, to the shaft 2. The attachment 4 consists of a plurality of rod-shaped fixing members 11 and an O-ring 21 that integrally combines these plurality of rod-shaped fixing members 11. The O-ring 21 provides elastic force between the plurality of rod-shaped fixing members 11 and the brush 3, and between the plurality of rod-shaped fixing members 11 and the shaft 3. A rod-shaped mounting hole 20, which is formed by a combination of the plurality of rod-shaped fixing members 11, is provided in the center of the attachment.

Description

Technical Field

[0001] The present invention relates to a rod-shaped body extension holder that removably attaches a rod-shaped body such as a writing instrument with a small shaft diameter and shaft length, making the use of this type of rod-shaped body comfortable.

Background Art

[0002] The production of plastic models requires a variety of pens for applying paints for painting and adhesives for assembly. Also, when producing plastic models, since it is necessary to wash the paints and adhesives attached to the pens with organic solvents, the pens are easily damaged and need to be frequently replaced with new ones. If a pen with a suitable shaft diameter and shaft length that is easy to hold is used, the production of plastic models can be made easier. However, on the other hand, since pens with a suitable shaft diameter and shaft length are expensive, the production cost of plastic models that have to use a large number of pens becomes high.

[0003] Therefore, in order to easily and inexpensively produce plastic models, it is necessary to prepare inexpensive pens with a miniaturized shaft portion and a rod-shaped body extension holder for attaching the miniaturized pens and making the use of this type of pen easier.

[0004] In addition, various stationery that incorporates a rod-shaped writing implement body such as an extender for making it easier to hold a shortened pencil and a pencil lead so that it can be extended are conventionally known (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, conventionally known stationery items of this type all consist of a first member with a slit and a male screw, and a second member with a female screw that can be screwed onto the male screw. By screwing the female screw onto the male screw and tightening it, the slit portion is elastically deformed inward, thereby fixing a writing instrument such as a pencil to the first member. For the various reasons described below, these are not suitable for use as a rod-shaped extension holder for detachably holding brushes necessary for making plastic models.

[0007] In other words, conventional stationery requires rotating a second component with a female thread onto a first component with a male thread each time a writing instrument is attached or detached. This takes a long time to attach and detach the writing instrument, making it completely unsuitable for the production of plastic models, where many brushes need to be frequently changed. Furthermore, conventional stationery is structured in such a way that the writing instrument is fixed to the first component with the slit by elastically deforming the slit-forming portion inward. This makes it structurally difficult to attach various brushes with significantly different shaft diameters, which also makes it unsuitable for the production of plastic models.

[0008] This problem arises not only when building plastic models, but in all situations where miniaturized, diverse writing instruments are used.

[0009] Therefore, the present invention aims to provide a rod-shaped extension holder that allows for easy attachment and detachment of various miniaturized rod-shaped objects such as brushes. [Means for solving the problem]

[0010] The rod-shaped extension holder of the present invention solves the above problem by comprising a cylindrical shaft with one end open and an attachment for connecting a rod-shaped body to the shaft, wherein the attachment is composed of a plurality of rod-shaped body fixing members and an elastic member that integrally combines the plurality of rod-shaped body fixing members and provides elastic force between the plurality of rod-shaped body fixing members and the rod-shaped body and between the plurality of rod-shaped body fixing members and the shaft, and a rod-shaped body mounting hole is formed in the center of the attachment by the combination of the plurality of rod-shaped body fixing members. [Effects of the Invention]

[0011] According to the present invention, a rod-shaped object can be attached to a shaft simply by inserting it between multiple rod-shaped object fixing members, each of which is provided with elasticity by an elastic member, thus facilitating the attachment and detachment of the rod-shaped object from the shaft. Furthermore, according to the present invention, since the rod-shaped object is held using rod-shaped object fixing members that are provided with elasticity by an elastic member, various writing instruments with different shaft diameters can be attached to the shaft, as long as the elastic member is within the range of elastic deformation. Therefore, the efficiency of tasks that involve appropriately changing a large number of diverse rod-shaped objects can be improved. [Brief explanation of the drawing]

[0012] [Figure 1] This is an exploded perspective view of the rod-shaped extension holder according to the embodiment. [Figure 2] This is a perspective view of the rod-shaped body fixing member according to the embodiment. [Figure 3] This is a front view of a rod-shaped body fixing member according to an embodiment. [Figure 4] This is a side view of a rod-shaped body fixing member according to an embodiment. [Figure 5] This is a rear view of the rod-shaped fixing member according to the embodiment. [Figure 6] This is a side view of the attachment according to the embodiment when a rod-shaped body is attached. [Figure 7] This is a cross-sectional view of the main part of the rod-shaped extension holder according to the embodiment, showing the state before the rod-shaped body is attached. [Figure 8]It is a cross-sectional view of the main part showing the state where the rod-shaped body of the rod-shaped body extension holder according to the embodiment is abutted against the inclined surface. [Figure 9] It is a cross-sectional view of the main part showing the state at the time of attaching the rod-shaped body of the rod-shaped body extension holder according to the embodiment. [Figure 10] It is a view showing the state where the rod-shaped body extension holder according to the embodiment is placed on the desk. [Figure 11] It is a front view of the attachment according to another embodiment.

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the rod-shaped body extension holder according to the present invention will be described based on the drawings. The scope of the present invention is not limited to the scope of the embodiments described below, and of course includes those implemented with various design changes without departing from the gist of the present invention.

[0014] As shown in FIG. 1, the rod-shaped body extension holder 1 according to the embodiment includes a cylindrical shaft body 2 having one end opened, and an attachment 4 that is detachably attached to the opening of the shaft body 2 and connects the shaft body 2 and the rod-shaped body 3. Examples of the rod-shaped body 3 include writing utensils such as pens, pencil cores, ballpoint pen cores, crayons, chalk, erasers, and cutter blades, but are not limited thereto. Hereinafter, the case where a pen is used as the rod-shaped body 3 will be described as an example. Therefore, in the following description, the "rod-shaped body 3" will be described as the "pen 3".

[0015] The pen 3 is composed of a brush part 3a and a shaft part 3b. As shown in FIG. 1, the rod-shaped body extension holder 1 according to the embodiment is configured to be able to attach both a pen 3 having a small shaft diameter D and a short shaft length L of the shaft part 3b and a pen 3 having a large shaft diameter D and a long shaft length L of the shaft part 3b.

[0016] The shaft body 2 is formed of an appropriate material selected from metal, plastic, paper, wood, and bamboo into an appropriate size that is easy to hold. Specifically, a shaft body 2 with a diameter of about 10 mm is assumed. Note that the outer shape of the shaft body 2 can be a cylindrical shape or, for example, a square tube shape having a hexagonal cross-sectional shape in addition to the cylindrical shape.

[0017] For the shaft body 2 formed of a metal material, knurling can be performed for anti-slip and decoration. Also, for the shaft body 2 formed of paper, wood, or bamboo, painting can be performed for surface protection and decoration.

[0018] The attachment 4 is composed of two rod-shaped fixing members 11 formed to be the same shape and size, and an O-ring (elastic member) 21 that integrally combines these two rod-shaped fixing members 11.

[0019] As shown in FIGS. 2 to 5, the rod-shaped fixing member 11 has a butting surface 12 for combining the rod-shaped fixing members 11 with each other in a predetermined arrangement. In the central portion in the width direction of the butting surface 12, a V-groove 13 formed by a combination of two flat surfaces 13a and 13b is formed in the length direction. Also, an inclined surface 14 that slopes outward is formed at one end of the V-groove 13 (the end on the insertion port side of the pen 3).

[0020] A locking surface 15 that abuts against the open end of the shaft body 2 is formed in the middle portion in the length direction of the rod-shaped fixing member 11. One side of the locking surface 15 (the side where the inclined surface 14 is formed) is a protruding portion 16 disposed outside the shaft body 2, and the opposite side is an insertion portion 17 inserted into the shaft body 2. The protruding portion 16 is formed to be tapered in order to make it easy to see the tip of the pen 3 attached to the attachment 4. On the other hand, the insertion portion 17 is formed in a straight shape having a size that can be inserted into the shaft body 2, and a fitting groove 18 for the O-ring 21 is formed on its outer surface.

[0021] A rectangular plate-shaped flange portion 19 is formed on the locking surface 15 of the rod-shaped body fixing member 11, extending outward from the outer surface of the rod-shaped body fixing member 11. In this embodiment, one side of the flange portion 19 is formed flush with the locking surface 15. The flange portion 19 is formed to an appropriate size that does not impair the usability of the rod-shaped body extension holder 1. The flange portion 19 can also be formed in a circular plate shape.

[0022] The rod-shaped fixing member 11 is integrally formed using a plastic material or a metal material such as aluminum.

[0023] Attachment 4 is assembled by aligning the longitudinal ends of two rod-shaped fixing members 11, bringing their abutting surfaces 12 together, and fitting the O-ring 21 into the fitting groove 18. This results in a cylindrical attachment 4 having a roughly rhomboid rod-shaped mounting hole 20 (see Figure 6) made up of a combination of V-grooves 13, a series of locking surfaces 15, a roughly spindle-shaped projection 16, a cylindrical insertion part 17, and a ring-shaped fitting groove 18.

[0024] As shown in Figures 7 to 9, the integrally assembled attachment 4 is detachably attached to the shaft 2 by inserting the insertion portion 17, which includes the O-ring 21, into the shaft 2 and abutting the locking surface 15 against the open end of the shaft 2.

[0025] When the insertion portion 17 is inserted into the shaft 2 and the brush 3 is not attached to the rod-shaped mounting hole 20 (see Figure 7), the O-ring 21 provides elastic force between the two rod-shaped fixing members 11 and the shaft 2, preventing the attachment 4 from falling off the shaft 2. Furthermore, when the insertion portion 17 is inserted into the shaft 2 and the brush 3 is attached to the rod-shaped mounting hole 20 (see Figure 9), the O-ring 21 provides elastic force between the two rod-shaped fixing members 11 and the shaft 2, and between the two rod-shaped fixing members 11 and the writing instrument 3, preventing the brush 3 from falling off the attachment 4.

[0026] Next, the method for attaching and detaching the brush 3 to the rod-shaped extension holder 1 according to the embodiment will be explained with reference to Figures 8 and 9.

[0027] When attaching the brush 3 to the rod-shaped extension holder 1 according to this embodiment, first, as shown in Figure 8, the end of the shaft portion 3b constituting the brush 3 is pressed against the inclined surface 14 formed on the attachment 4, and the brush 3 is pressed towards the attachment 4. This guides the brush 3 to the inclined surface 14 and positions it at the center of the rod-shaped mounting hole 20. When the brush 3 is further pressed towards the attachment 4 from this state, the two rod-shaped fixing members 11 constituting the attachment 4 are pushed apart against the elastic force of the O-ring 21, and the shaft portion 3b is inserted into the rod-shaped mounting hole 20. As shown in Figure 6, the shaft portion 3b of the brush 3 is stably held by the four planes 13a, 13b constituting the rod-shaped mounting hole 20. Then, when the pushing of the brush 3 is stopped at the desired position, as shown in Figure 9, the brush 3 is attached to the rod-shaped extension holder 1 and the brush 3 becomes ready for use. To remove the brush 3 from the rod-shaped extension holder 1, force is applied to the brush 3 in the pulling direction.

[0028] The rod-shaped extension holder 1 according to this embodiment allows the brush 3 to be attached to and detached from the shaft 2 simply by biasing the brush 3 in one direction. This makes it easier to attach and detach the brush 3 to the shaft 2 compared to cases where some part is rotated to do so. Therefore, it is possible to efficiently produce plastic models, which often involve frequently changing many brushes, and to produce plastic models at a low cost by using inexpensive brushes 3 with small shaft diameters D and shaft lengths L.

[0029] The rod-shaped extension holder 1 according to this embodiment is configured to hold the brush 3 inserted into the attachment 4 by the elastic force of the O-ring 21. Therefore, various brushes 3 with different shaft diameters D can be attached to the shaft 2 within the range in which the O-ring 21 can elastically deform, making it a highly versatile rod-shaped extension holder. Specifically, it is expected that brushes 3 with shaft diameters D from 2.8 mm to 4.3 mm can be used.

[0030] In the embodiment, the rod-shaped extension holder 1 has a rod-shaped mounting hole 20 formed between two rod-shaped fixing members 11 that are combined in a predetermined arrangement, so that the brush 3 inserted into the attachment 4 can be held stably. Furthermore, in the embodiment, the rod-shaped extension holder 1 has a rod-shaped mounting hole 20 composed of four flat surfaces 13a and 13b, so that various brushes 3 with different shaft diameters D of the shaft portion 3b can be held stably.

[0031] In the embodiment, the rod-shaped extension holder 1 has an inclined surface 14 formed at the rod-shaped insertion opening of the rod-shaped mounting hole 20, which guides the brush 3 to the center of the rod-shaped mounting hole 20, making it easy and reliable to insert the brush 3 into the attachment 4.

[0032] The rod-shaped extension holder 1 according to this embodiment uses an O-ring 21 as an elastic member, thus providing excellent durability and reliability. Furthermore, since commercially available O-rings can be used, the manufacturing cost of the rod-shaped extension holder 1 can be kept low.

[0033] In the rod-shaped extension holder 1 according to this embodiment, a locking surface 15 is formed in the middle of the rod-shaped fixing member 11, and this locking surface 15 abuts against the open end of the shaft 2, so that the attachment 4 is not pushed into the shaft 2 when the brush 3 is attached. Furthermore, in the rod-shaped extension holder 1 according to this embodiment, the attachment 4 is stably held on the shaft 2 by the elastic force of the O-ring 21, so that the attachment 4 does not fall off the shaft 2 when the brush 3 is removed.

[0034] In the embodiment, the rod-shaped extension holder 1 has a plate-shaped flange portion 19 formed in the middle of the rod-shaped fixing member 11. As shown in Figure 10, when the rod-shaped extension holder 1 with the brush 3 attached is placed on a workbench T, only the tip of the flange portion 19 and the upper end of the shaft 2 make contact with the workbench T, and the brush 3 does not make contact with the workbench T, thus preventing the workbench T from getting dirty. Also, since the middle portion of the rod-shaped extension holder 1 is raised above the top surface of the workbench T, it is easy to pick up the rod-shaped extension holder 1 from the workbench T. Furthermore, in the embodiment, since the flange portion 19 is formed in a rectangular plate shape, the rod-shaped extension holder 1 does not roll on the workbench T, preventing the brush 3 from falling from the workbench T.

[0035] In the embodiment, the rod-shaped extension holder 1 has one side of the flange portion 19 and the locking surface 15 formed flush with each other. This simplifies the structure of the mold used to manufacture the rod-shaped fixing member 11, thereby reducing the manufacturing cost of the rod-shaped fixing member 11 and, consequently, the rod-shaped extension holder 1. Furthermore, the rod-shaped fixing member 11 can have a simple appearance, resulting in a rod-shaped extension holder 1 with superior aesthetics.

[0036] Furthermore, the rod-shaped extension holder 1 to which the brush 3 is attached is not only applicable to the production of plastic models, but can also be used for other purposes such as applying makeup.

[0037] Furthermore, although an O-ring 21 was used as the elastic member in the above embodiment, the gist of the present invention is not limited thereto, and as shown in Figure 11, a rubber tube 22 can be used as the elastic member.

[0038] Furthermore, although two writing instrument fixing members 11 were used as components of the attachment 4 in the above embodiment, the attachment 4 can also be constructed using three or more writing instrument fixing members 11. [Explanation of Symbols]

[0039] 1... Rod-shaped extension holder, 2... Shaft, 3... Brush (rod-shaped), 3a... Brush part, 3b... Shaft part, 4... Attachment, 11... Rod-shaped fixing member, 12... Butt surface, 13... V-groove, 13a, 13b... Flat surface, 14... Inclined surface, 15... Locking surface, 16... Protruding part, 17... Insertion part, 18... Fitting groove, 19... Flange part, 20... Rod-shaped mounting hole, 21... O-ring (elastic member), 22... Rubber tube (elastic member).

Claims

1. It consists of a cylindrical shaft with one end open and an attachment that connects a rod-shaped body to the shaft. The attachment comprises a plurality of rod-shaped fixing members, an elastic member that integrally combines the plurality of rod-shaped fixing members and provides elastic force between the plurality of rod-shaped fixing members and the rod-shaped body, and between the plurality of rod-shaped fixing members and the shaft. The combination of the multiple rod-shaped fixing members creates a rod-shaped mounting hole in the center of the attachment. A rod-shaped extension holder characterized by the following features.

2. The rod-shaped body mounting hole is formed by a combination of planes formed on the plurality of rod-shaped body fixing members, as described in claim 1.

3. The rod-shaped body extension holder according to claim 1, characterized in that the rod-shaped body insertion opening of the rod-shaped body mounting hole has an inclined surface formed therein that guides the rod-shaped body to the center of the rod-shaped body mounting hole.

4. The rod-shaped extension holder according to claim 1, characterized in that an O-ring or a rubber tube is used as the elastic member.

5. The rod-shaped body fixing member is characterized in that a locking surface is formed in the middle portion in the longitudinal direction, which abuts against the open end of the shaft, as described in claim 1.

6. The rod-shaped body fixing member is characterized in that a plate-shaped flange portion that protrudes outward is formed in the middle of its length, as described in claim 1.

7. The rod-shaped extension holder according to claim 6, characterized in that one side of the flange portion is formed flush with the locking surface.

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