WO2020246278A1

WO2020246278A1 - Pen-type compass

Info

Publication number: WO2020246278A1
Application number: PCT/JP2020/020424
Authority: WO
Inventors: 智子高木
Original assignee: 株式会社レイメイ藤井
Priority date: 2019-06-05
Filing date: 2020-05-22
Publication date: 2020-12-10
Also published as: CN113993714B; JPWO2020246278A1; JP7454077B2; JP7234360B2; CN113993714A; KR102631703B1; JP2023054261A; KR20220005086A

Abstract

[Problem] To provide a pen-type compass that makes the lead of a typical mechanical pencil usable and facilitates a knocking operation to enable an improvement in usability. [Solution] A pen-type compass is provided with a needle-side body 12 and a sharp-side body 11. The sharp-side body 11 is provided with a sharp-side body upper part 11a, a sharp-side body lower part 11b that accommodates a sharp mechanical part 21, and a connection part 13 that detachably connects the sharp-side body upper part 11a and a sharp-side body lower part 11b to each other. The connection part 13 is provided with a through-hole in a axial direction thereof, a lead protection part 133 that retains an upper part of a lead having a typical length (60 mm) inserted into the sharp mechanical part 21, formed to have such a length as to be capable of accommodating an upper end portion of the lead, and provided with a cone-shaped protrusion part 145 at a surface of a knock part 14.

Description

Pen-shaped compass

The present invention relates to a pen-type compass having excellent portability, and makes it possible to use a lead of a mechanical pencil having a particularly general length, facilitates a knock operation for pulling out the lead, and improves usability. Regarding the compass.

[Explanation of prior art]
Conventionally, as a compass that is convenient to carry, there is a pen-type compass that is pen-shaped and has a cap.
The pen-type compass has a substantially cylindrical shape like a writing instrument when the legs of the main body are closed, and is provided with a cap that protects the tip of the needle or core with the exposed tip.
By attaching the cap, the needle and core are not exposed, so it can be handled safely, it will not damage other items when stored in the pen case, and the tip of the compass can be protected. , It is convenient to carry.
Since the closed state is a pen type, it can be stored in a pen case like other pens.

In addition, some pen-type compasses are equipped with a small mechanical pencil instead of a lead. The mechanical pencil type pen-type compass is provided with a mechanical pencil mechanism (sharp mechanism) that stores the lead and pulls out the lead at a specific pitch by knocking from the outside.
In the conventional mechanical pencil type pen-type compass, a dedicated lead having a shorter length than a lead for a general mechanical pencil has been used.

In addition, in the conventional mechanical pencil type pen type compass, the knock part for knocking is a side knock type provided on the side surface of the main body, and the knock part is slid down to knock and extend the core. It has become.

[Related technology]
As the prior art related to the compass, utility model registration No. 3178069 "Compass" (Patent Document 1), utility model registration No. 3179264 "Compass" (Patent Document 2), Jitsukaisho 60-141289 publication " There is a "compass with a visible pencil lead" (Patent Document 3).

Patent Document 1 describes a pen-type compass provided with a core feeding device.
Patent Document 2 describes a compass in which a needle is formed in black and a pencil can be attached.
Patent Document 3 describes a compass capable of incorporating a replacement core.

Utility Model Registration No. 3178069 Utility Model Registration No. 3179264 Jikkai Sho 60-141289 Gazette

However, it is inconvenient to use a pen-type compass that uses a conventional mechanical pencil because it is not possible to use a lead of a mechanical pencil of a general length, and because it is a side knock type, especially for children, from the fingertips. There was a problem that it may be difficult to perform a knocking operation because the force of the pencil cannot be transmitted well.

Note that Patent Documents 1 to 3 do not describe a mechanical pencil type pen-type compass that can use a general mechanical pencil lead and facilitate knocking operation.

The present invention has been made in view of the above circumstances, and a pen-type compass capable of improving convenience by making a general mechanical pencil lead usable, facilitating knocking operation, and improving usability. The purpose is to provide.

The present invention for solving the above-mentioned problems of the conventional example includes a needle-side main body as a leg provided with a needle, a sharp-side main body as a leg for accommodating a mechanical pencil mechanism, and a needle-side main body. It has a central part that stores and holds the upper end of the main body on the sharp side, and when the main body on the needle side and the main body on the sharp side are closed together, it becomes a pen-shaped compass, and the main body on the sharp side is sharp. It is provided with a connecting portion that connects the upper part of the main body on the side, the lower part of the main body on the sharp side, and the upper part of the main body on the sharp side and the lower part of the main body on the sharp side. A knock part that has a substantially cylindrical core protection part that protects the upper part of the core and is formed to a length that can store the upper end part of the core, and knocks the core out on the side surface of the lower part of the main body on the sharp side. Is provided, and the surface of the knock portion is provided with a protrusion protruding in a chevron shape.

Further, according to the present invention, in the pen-type compass, the knock portion is provided with an uneven portion, and the protrusion is provided on the lower side of the uneven portion.

Further, in the above-mentioned pen type compass, in the state where the mechanical pencil mechanism portion is housed in the lower part of the main body on the sharp side and the connecting portion is connected to the lower part of the main body on the sharp side, a core of about 60 mm from the upper end of the core protection portion is formed. When inserted, the upper part of the core does not protrude from the upper end of the connecting portion.

Further, the present invention is provided with a cap that is attached to the tip of the pen-type compass in a closed state in which the needle-side main body and the sharp-side main body are combined and closed to protect the tip.

According to the present invention, the needle-side main body, which is the leg on which the needle is provided, the sharp-side main body, which is the leg on which the mechanical pencil mechanism is housed, and the upper ends of the needle-side main body and the sharp-side main body are stored. It is a pen-shaped compass that has a central part to hold and when the needle side main body and the sharp side main body are closed together, it becomes a pen-shaped compass, and the sharp side main body is the sharp side main body upper part and the sharp side main body lower part. And a connecting part that connects the upper part of the main body on the sharp side and the lower part of the main body on the sharp side, and the connecting part has a substantially cylindrical shape that protects the upper part of the core of the mechanical pencil having a length of about 60 mm inserted into the mechanical pencil mechanism. It is provided with a core protection part and is formed to a length that can store the upper end part of the core, and a knock part that performs a knock operation to pull out the core is provided on the side surface of the lower part of the main body on the sharp side, and on the surface of the knock part. Is a pen-type compass with a protrusion that protrudes in a chevron shape, so you can use a lead for a sharp pencil of a general length without preparing a special lead, which is convenient. In addition to improving the knocking, the finger is caught on the protrusion at the time of knocking, so that it is hard to slip, the knocking operation can be easily performed, and the usability can be improved.

It is a perspective view which shows the schematic structure of this compass. It is a perspective view in the state which the cap is closed. It is an external view of the inside of the sharp side main body 11. It is an exploded explanatory view which shows the structure of the Sharp side main body 11. It is explanatory drawing which shows the structure (1) of the scale part. It is explanatory drawing which shows the structure (2) of the scale part.

Embodiments of the present invention will be described with reference to the drawings.
[Outline of Embodiment]
The pen-type compass (the present compass) according to the embodiment of the present invention includes a needle-side main body provided with a needle and a mechanical pencil-side main body (sharp-side main body) provided with a mechanical pencil mechanism. When the mechanical pencil and the mechanical pencil are closed together, it becomes a pen shape with a substantially cylindrical shape.
The sharp side main body includes a sharp side main body upper portion, a sharp side main body lower portion, and a connecting portion connecting the sharp side main body upper portion and the sharp side main body lower portion, and the connecting portion has a through hole in the axial direction. , A substantially cylindrical core protection portion that protects the upper portion of a general 60 mm long core inserted into the mechanical pencil mechanism portion is provided, and the upper end portion of the core is formed to a length that can be stored. This is a mechanical pencil that can improve convenience by forming a sufficient space above the mechanical pencil mechanism and using a general mechanical pencil lead without using a dedicated lead. Is.

In addition, this compass is provided with a knock portion for knocking the mechanical pencil mechanism on the side surface of the lower part of the main body on the sharp side, and a plurality of non-slip streaks (concavo-convex portions) are formed on the surface of the knock portion and the uneven portion. A protrusion is provided closer to the tip of the pen, and the fingertip is caught when knocking to facilitate the knocking operation and improve usability.

[Rough configuration of the pen-type compass according to the embodiment: FIGS. 1 and 2]
The schematic configuration of this compass will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing a schematic configuration of the compass, and FIG. 2 is a perspective view in a state where the cap is closed.
As shown in FIG. 1, the compass includes a main body 1 and a cap 2 that covers (attaches) the tip of the main body 1. As shown in FIG. 2, in a state where the cap is closed, a ballpoint pen or the like is used. It has a shape very similar to a writing instrument.
This compass is a mechanical pencil type configuration in which a mechanical pencil is provided on the leg of the main body 1.

The main body 1 includes a central portion 10, a sharp side main body 11 which is one leg of the compass, a needle side main body 12 which is the other leg, and a main body connecting portion 15.
Further, the sharp side main body 11 includes a sharp side main body upper portion 11a, a sharp side main body lower portion 11b, a connecting portion 13, and a knock portion 14.
The upper part 11a of the main body on the sharp side, the lower part 11b of the main body on the sharp side, and the main body 12 on the needle side are formed of zinc die-cast or the like, and the central portion 10, the connecting portion 13, and the knock portion 14 are made of plastic or the like.

The sharp side main body 11 is provided with a mechanical pencil mechanism (sharp mechanism) inside, and the pen tip 31 of the mechanical pencil is exposed at the tip.
When the knock portion 14 is knocked, the core 32 is extended from the pen tip 31. Here, the core 32 is not a short core dedicated to the compass, but a core having a length of 60 mm used for a general mechanical pencil. With the availability of cores of common length, users can use the lead of a mechanical pencil that they normally use or choose a lead of their preferred hardness.
Further, the needle side main body 12 is provided with a needle 33 at the tip.

The needle 33 of this compass is a black needle.
By making it black, the tip of the needle 33 becomes easier to see (improves visibility) when the compass is used on a notebook or the like, which is often a white background, and usability can be improved. ..

The central portion 10 is provided with a knob at the upper end and a central device for fixing the knob to the center of the compass inside, and houses and holds the upper end 11a of the sharp side main body and the upper end of the needle side main body 12.
The main body connection portion 15 includes screws and nuts, and the sharp side main body upper portion 11a and the needle side main body 12 are housed in a state where the sharp side main body upper portion 11a and the upper end portion of the needle side main body 12 are housed inside the central portion 10. Fix it so that it can be slidable. The nut of the main body connecting portion 15 is provided on the back side of FIGS. 1 and 2.

The sharp side main body 11 and the needle side main body 12 can be opened and closed centering on the point connected by the main body connecting portion 15.
The sharp side main body 11 and the needle side main body 12 are opened by the central device by the same angle, so that the knob of the central portion 10 is always located at the center of the compass.

The cap 2 is made of polypropylene (PP), ABS (acrylonitrile-butadiene-styrene; Acrylonitrile-Butadiene-Styrene) resin, or the like, and covers the tip portion of the cap 2 with the sharp side main body 11 and the needle side main body 12 in contact with each other. It is fixed so that it will not come off.

The connecting portion 13 is a characteristic portion of the compass, connects the upper portion 11a of the sharp side main body and the lower portion 11b of the sharp side main body, and also functions as a stopper on the upper end side of the knock portion 14.
The connecting portion 13 is detachably connected to the sharp side main body upper portion 11a and the sharp side main body lower portion 11b.

The knock portion 14 is a side knock type knock button, and by pushing down toward the lower end direction of the main body 1, the spring of the sharp mechanism portion described later is compressed and the core is sent out. When the finger is released to release the push-down, the knock portion 14 returns to the original position.
The surface of the knock portion 14 is provided with a plurality of streaky uneven portions and protrusions 145 so that a finger can easily catch it.

The protrusion 145 is a mountain-shaped protrusion that is provided closer to the lower end of the knock portion 14 than the uneven portion and protrudes outward from the side surface of the main body 1. The height of the protruding portion 145 is formed higher than the height of the convex portion of the uneven portion, and is high enough to catch the belly of the thumb.

Since the knock portion 14 is provided with not only the uneven portion but also the protrusion 145, when the knock portion 14 is pushed downward (in the direction of the pen tip 31), the fingertip is caught by the protrusion 145 and becomes hard to slip. , It is easy to transmit force and facilitate knocking operation. As a result, even a child can easily perform a knocking motion.
The internal configuration of the connecting portion 13 and the knock portion 14 will be described later.

Further, a recess 16 is provided in a portion where the sharp side main body 11 and the needle side main body 12 come into contact with each other so that it can be easily operated when both main bodies are opened from the closed state. Specifically, the sharp side main body is provided with a recessed portion 16a, and the needle side main body 12 is provided with a recessed portion 16b. The recessed portion 16a of the sharp side main body 11 is provided in the connecting portion 13.
The recessed

portions

16a and 16b are similarly formed on the back sides of FIGS. 1 and 2.

[Inside of main body 11 on the sharp side: Fig. 3]
Next, the configuration inside the sharp side main body 11 will be described with reference to FIG. FIG. 3 is an external view of the inside of the sharp side main body 11.
As shown in FIG. 3, the inside of the sharp side main body 11 (the side that comes into contact with the needle side main body 12) is composed of a sharp side main body upper portion 11a, a connecting portion 132 of the connecting portion 13, and a sharp side main body lower portion 11b. ing.
The inside of the lower portion 11b of the main body on the sharp side is hollow, and the sharp mechanism portion is housed in the hollow portion. Specifically, the internal cavity of the lower part 11b of the main body on the sharp side has two levels of thickness, the upper part is thick (large diameter) and the lower part is thin (small diameter).
The connecting portion 132 of the connecting portion 13 will be described later.

[Structure of the main body 11 on the sharp side: FIG. 4]
Next, the configuration of the sharp side main body 11 will be described with reference to FIG. FIG. 4 is an exploded explanatory view showing the configuration of the sharp side main body 11.
As shown in FIG. 4, the sharp side main body 11 of this compass includes a sharp side main body lower portion 11b, a sharpening mechanism portion 21, a knock portion 14, a connecting portion 13, and a sharp side main body upper portion 11a.

The sharp mechanism unit 21 is a general-purpose product, and houses the core 32 inside a cylindrical shaft.
A spring portion 24 and a pressing portion 23 provided on the upper portion of the spring portion 24 are provided on the outside of the shaft, and the pressing portion 23 is further provided with an engaging portion 231 that engages with the protruding portion 142 of the knock portion 14. It is provided.

As described above, the inside of the lower portion 11b of the sharpening side main body is hollow, the sharpening mechanism portion 21 is housed, and the pen tip 31 of the sharpening mechanism portion 21 projects from the lower end portion of the lower portion 11b of the sharpening side main body. The upper portion of the sharp mechanism portion 21 is housed without protruding from the upper end portion of the lower portion 11b of the main body on the sharp side.
The length of each part is as follows: Sharp side main body lower part 11b> Connecting part 13> Sharp side main body upper part 11a> Knock part 14.
Further, a slit 111 with which the knock portion 14 is slidably engaged is formed on the outer side surface (back side in FIG. 4) of the lower portion 11b on the sharp side.
The knock portion 14 holds the upper portion of the sharp mechanism portion 21.

Further, a fixing portion 40 for fixing the sharp mechanism portion 21 is attached to the inside of the lower portion 11b of the main body on the sharp side. The fixing portion 40 has a substantially cylindrical shape having a through hole inside, and is formed of an elastic resin or the like.
FIG. 4 shows a state in which the fixing portion 40 is attached to the side of the sharpening mechanism portion 21 for the sake of clarity, but in reality, the fixing portion 40 is fixed in advance inside the cylinder of the lower part 11b of the sharpening side main body. It is provided.

Specifically, the outer diameter of the fixed portion 40 is formed to be smaller than the inner diameter of the upper part of the sharp side main body 11b and slightly larger than the inner diameter of the lower part. Then, the fixing portion 40 is strongly pushed from the upper cavity of the sharp side main body 11b into the lower cavity and fixed.

Further, the inner diameter of the fixing portion 40 (diameter of the through hole) is formed to be slightly smaller than the outer diameter of the sharp mechanism portion 21, so that the sharp mechanism portion 21 is strongly inserted into the through hole of the fixing portion 40 and fixed by friction. It has become.
Since the fixing portion 40 is a deformable material, it is deformed when a force is applied, and the sharp mechanism portion 21 can be inserted at the time of manufacturing the compass.

Further, the core 32 used in this compass is a core for a general mechanical pencil, and at the beginning of use, it protrudes upward from the upper end of the sharp mechanism portion 21.
In this compass, the lead of a general mechanical pencil can be used by providing a space for accommodating the protruding portion in the sharp side main body 11. It should be noted that a conventional short core dedicated to the compass can also be used.

The knock portion 14 includes a knock portion side surface 141 that is a part of the outer side surface of the sharp side main body 11, and a protruding portion 142 that projects inward. The uneven portion and the protrusion 145 described above are formed on the outside of the knock portion side surface 141.
The knock portion side surface 141 comes into contact with the connecting portion side surface 131.
The protruding portion 142 has a disk shape and is provided with a hole through which the upper portion of the sharp mechanism portion 21 penetrates near the center.
The portion connecting the side surface 141 of the knock portion and the protruding portion 142 engages with the recess 111 of the lower portion 11b of the sharp side main body, and the knock portion 14 slides up and down.

Further, the protruding portion 142 of the knock portion 14 engages with the engaging portion 231 of the sharp mechanism portion 21.
Then, when the knock portion 14 is pressed, the pressing portion 23 is pushed downward by the protruding portion 142, the pressing portion 23 presses and contracts the spring portion 24, and the core 32 is extended from the pen tip 31.

The connecting portion 13 is connected to a connecting portion side surface 131 that is a part of the outer side surface of the sharp side main body 11 and a connecting portion 132 that is connected to the connecting portion side surface 131 and is a part of the inner side surface of the sharp side main body 11. It is provided with a cylindrical core protection portion 133 provided.
The core protection portion 133 protects the upper portion of the core protruding from the sharp mechanism portion 21.
Further, the hole penetrating the inside of the core protection portion 133 is formed so that the axis coincides with the hole of the sharp mechanism portion 21, and is a space for accommodating the upper portion of the core 32.

That is, in this compass, since a space through which the lead can penetrate is provided from the sharp mechanism portion 21 to the core protection portion 133 of the connecting portion 13, a general mechanical pencil that is longer than the conventional short dedicated lead. It is possible to use a mechanical pencil.
That is, the space formed over the lead protection portion 133 of the sharp mechanism portion 21 and the connecting portion 13 is longer than the length (60 mm) of the lead for a general mechanical pencil, and is sufficiently stored up to the upper end portion of the lead 32. It is a thing.

As a result, the sharpening mechanism portion 21 is housed in the lower portion 11b of the main body on the sharpening side, and the upper end of the new core 32 does not protrude in a state where the knock portion 14 and the connecting portion 13 are connected.
Therefore, the user can use the core used for an ordinary mechanical pencil for this compass without having to prepare a dedicated core for the compass.

In terms of holding the core, the core protection portion 133 does not have to be formed over the entire length direction of the connecting portion 13, and may be, for example, about the same length as the connecting portion 132. However, as shown in FIG. 4, by forming the core protection portion 133 over almost the entire length direction of the connecting portion 13, the core is stably held in the cavity, and when the core 32 is inserted. It protects the core from being displaced and the tip from hitting the edge of the sharpening mechanism 21 and breaking.

Then, the upper end portion of the connecting portion 132 abuts on the lower end portion of the sharp side main body upper portion 11a, and the lower end portion of the connecting portion 132 abuts on the upper end portion of the sharp side main body lower portion 11b and engages with each other. The sharp side main body 11 of the compass is assembled.
When inserting the core 32, the sharp side main body 11 is removed from the sharp side main body upper portion 11a, and the core is inserted through the opening at the upper end of the core protection portion 133.

[Application example: Dimension matching of circle]
In the conventional compass, when drawing a circle, the sharp side main body 11 and the needle side main body 12 are opened, and the distance between the lead 32 and the needle 33 of the mechanical pencil is measured with a ruler or the like to adjust the opening to a desired radius. Was adjusting.
In addition, the radius may shift while drawing a circle, and the correct circle may not be drawn.
In the application example of this compass, a simple scale part is provided as an accessory part separately from the main body, and the scale part can be attached to the main body so that a circle of a specific size can be drawn without measuring with a ruler. Furthermore, the distance (angle) between the sharp side main body 11 and the needle side main body 12 can be fixed so that the dimensions do not shift during drawing.
An application example will be described.

[Structure of scale (1): Fig. 5]
The structure (1) of the scale portion will be described with reference to FIG. 5A and 5B are explanatory views showing the configuration (1) of the scale portion, FIG. 5A shows a protrusion provided on the main body side, and FIG. 5B shows a state in which the scale portion 4 is attached to the compass. There is.
The scale portion 4 may be attached to either the sharp side main body 11'or the needle side main body 12', but here, a configuration for attaching to the needle side main body 12'will be described.

As shown in FIG. 5A, the compass to which the scale portion 4 can be attached is provided with two

protrusions

21a and 21b on the needle side main body 12'and a protrusion 21c on the sharp side main body 11'. .. With these

protrusions

21a, 21b, 21c, the scale portion 4 is attached to the compass and further fixed to a desired radius.
The positions where the

protrusions

21a, 21b and 21c are provided are arbitrary as long as they do not hinder the movement of the knock portion 14, but may be provided in the

recesses

16a and 16b, for example.

Further, as shown in FIG. 5B, the scale portion 4 is used by being attached to the needle side main body 12'of the compass, and is a removable member.
The scale portion 4 is formed of a thin plate such as plastic in a bow shape (arc shape), holes 41a and 41b are formed at one end, and a plurality of holes 42 are formed toward the other end. It is arranged on an arc.
The holes 42 correspond to radii 2.0 cm, 2.5 cm, 3.0 cm, 3.5 cm, and the like, and the corresponding radial dimension values are described near each hole 42. That is, by engaging each hole 42 with the protrusion 21c, the distance between the needle 33 and the tip of the lead 32 of the mechanical pencil becomes a corresponding radial dimension.

Specifically, as shown in FIG. 5B, the

protrusions

21a and 21b of the needle side main body 12'and the

holes

41a and 41b provided at the ends of the scale 4 are engaged with each other. The scale portion 4 is fixed to the needle side main body 12'. By providing two protrusions, the scale portion 4 can be firmly fixed without rotating.
Further, the protrusion 21c provided on the sharp side main body 11'engages with any of the hole portions 42 of the scale portion 4 so that the needle side main body 12'and the sharp side main body 11'have a specific radial dimension. Fix the interval (angle).

The diameters of the

protrusions

21a, 21b, 21c are formed to be equal to or slightly larger than the diameters of the

holes

41a, 41b, 42, and the

holes

41a, 41b, 42 are deformed when the scale 4 is attached or detached. It spreads out and can be inserted or removed, and in the mounted state, it does not come off unintentionally.

When the scale portion 4 is used, it cannot be fixed to dimensions other than the hole portion 42, but it can be easily set to a radius dimension that is often used by a simple mechanism, and the dimension can be set while drawing a circle. It is possible to prevent the deviation and improve the convenience.

[Structure of scale (2): Fig. 6]
In the above-mentioned structure of the scale portion (1), it is necessary to form a protrusion on the compass body, but in the configuration of the scale portion (2), it is not necessary to change the compass body and it can be easily realized. It is a thing.
The structure (2) of the scale portion will be described with reference to FIG. 6A and 6B are explanatory views showing the configuration (2) of the scale portion, FIG. 6A is a state in which the scale portion 5 is attached to the compass, FIG. 6B is an attachment portion on the needle side main body 12, and FIG. The engaging portion in the sharp side main body 11 is shown.
The scale portion 5 is a component that is detachably fixed to either the needle-side main body 12 or the sharp-side main body 11 of the compass, and here, the case where it is attached to the needle-side main body 12 is shown.

As shown in FIG. 6A, the scale portion 5 is formed of plastic or the like in a bow shape, includes a plurality of scale lines 51, and is detachably fixed to the needle side main body 12 by the fixing portion 52. Similar to the scale portion 5, the value of the radial dimension is described in the vicinity of the scale line 51, but the illustration is omitted.

Further, a holding portion 54, which is a removable part, is attached to the sharp side main body 11.
The pressing portion 54 is a component that lightly presses the scale portion 5 on the sharp side main body 11, and a through hole 56 (see FIG. 6 (c)) penetrating in the left-right direction is formed in FIG. 6 (a). The scale portion 5 penetrates the 56, and the pressing portion 54 slides on the scale portion 5 as the sharp side main body 11 opens and closes.

Further, the pressing portion 54 is formed of a transparent member, and a scale matching portion 55 serving as a guideline for a desired radius is formed on the surface thereof. The line of the scale portion 55 is drawn long so as not to be confused with the scale line 51 of the scale portion 5. The scale matching portion 55 and the scale line 51 may have different colors.
Then, while opening and closing the mechanical pencil side main body 11 and looking at the scale line 51 of the scale portion 5 through the transparent pressing portion 54, the user adjusts the length of the desired radius to the scale portion 55 with the scale line 51 as a guide. As a result, the distance between the needle 32 of the compass and the lead of the mechanical pencil becomes the length of the radius.

Further, as shown in FIG. 6B, an L-shaped fixing portion 52 is provided at the left end portion of the scale portion 5.
The fixing portion 52 is formed, for example, in a size and length that fits snugly into the recessed portion 16b of the needle-side main body 12. As a result, the scale portion 5 is always attached to the same position, and the variation in the radial dimension is prevented.

Further, as shown in FIG. 6C, a pressing portion 54 is attached to the recessed portion 16a of the sharp side main body 11. The pressing portion 54 includes a fixing portion 53 formed in an L shape, and is fitted and fixed to the recessed portion 16b. As described above, the pressing portion 54 is provided with a through hole 56, and the scale portion 5 penetrates therethrough.

[Another application example]
As another application example, the sharp mechanism portion 21 may be removable, various sharp mechanism portions may be prepared as accessory parts, and any sharp mechanism portion may be attached and used.
For example, a sharp mechanism portion of a type in which the core automatically comes out without knocking may be attached.
Further, the thickness of the core is not limited to the general 0.5 mm, and a sharp mechanism portion corresponding to a core of 0.3 mm or 0.7 mm may be attached.
As a result, the user can select the operation method and the thickness of the core according to his / her taste and application.

[Effect of Embodiment]
According to this compass, the sharp side main body 11 includes a sharp side main body upper portion 11a, a sharp side main body lower portion 11b, and a connecting portion 13, and the connecting portion 13 has a through hole in the axial direction, and the sharpening mechanism portion 21. Since it is a pen-type compass that has a core protection part 133 that protects the upper part of the core of the general length (60 mm) inserted in, and also has a space that can store up to the upper end of the core, it is a core dedicated to the compass. Even if you do not prepare a lead, you can use a core for a general mechanical pencil, which has the effect of improving convenience.

Further, according to the present invention, since the protrusion 145 is provided on the surface of the side knock type knock portion 14, the finger is caught by the protrusion 145 during the knock operation, and the knock portion 14 can be easily pressed. It has the effect of improving usability.

Further, according to this compass, since the main body is provided with a removable scale portion 4, the compass can be easily opened according to the radial dimension without a ruler or the like, and the hole of the scale portion 4 can be opened. By engaging the protruding portion 21c of the main body with the portion 42, the open state can be fixed, the radial dimension cannot be displaced during drawing, and the convenience can be improved.

The present invention relates to a pen-type compass that is excellent in portability, enables the use of a general mechanical pencil lead, facilitates a knock operation for pulling out the lead, and improves usability.

1 ... Main body, 2 ... Cap, 4, 5 ... Scale part, 10 ... Central part, 11, 11'... Sharp side main body, 11a ... Sharp side main body upper part, 11b ... Sharp side main body lower part, 12, 12' ... Needle side Main body, 13 ... connecting part, 14 ... knocking part, 15 ... main body connecting part, 16a, 16b ... recessed part, 21 ... sharp mechanism part, 21a, 21b, 21c ... protruding part, 23 ... pressing part, 24 ... spring part, 31 ... Pen tip, 32 ... Core, 33 ... Needle, 40 ... Fixed part, 41a, 41b, 42 ... Hole part, 51 ... Scale line, 52, 53 ... Fixed part, 54 ... Holding part, 55 ... Scale matching part, 56 ... Through hole, 111 ... Slit, 131 ... Connecting part side surface, 132 ... Connecting part, 133 ... Core protection part, 141 ... Knocking part side surface, 142 ... Protruding part, 145 ... Protruding part, 231 ... Engaging part

Claims

A needle-side main body that serves as a leg on which a needle is provided, a sharp-side main body that serves as a leg that houses a mechanical pencil mechanism, and a central portion that houses and holds the upper ends of the needle-side main body and the sharp-side main body. It is a pen-shaped compass that becomes a pen-shaped shape when the needle-side main body and the sharp-side main body are put together and closed.
The sharp side main body includes a sharp side main body upper part, a sharp side main body lower part, and a connecting portion connecting the sharp side main body upper part and the sharp side main body lower part.
The connecting portion includes a substantially cylindrical core protecting portion that protects the upper portion of the lead of a mechanical pencil having a length of about 60 mm inserted into the mechanical pencil mechanism portion, and has a length capable of accommodating the upper end portion of the lead. Is formed in
On the side surface of the lower part of the main body on the sharp side, a knock portion for knocking out the core is provided.
A pen-type compass having a protrusion protruding outward on the surface of the knock portion.
The knock part has an uneven part,
The pen-type compass according to claim 1, wherein the protrusion is provided below the uneven portion.
With the mechanical pencil mechanism housed in the lower part of the main body on the sharp side and the connecting part connected to the lower part of the main body on the sharp side,
The pen-type compass according to claim 1 or 2, wherein when a core of about 60 mm is inserted from the upper end of the core protection portion, the upper portion of the core does not protrude from the upper end of the connecting portion.
The pen-type compass according to any one of claims 1 to 3, which is attached to the tip portion in a closed state in which the needle side main body and the sharp side main body are combined and provided with a cap for protecting the tip portion.