WO2020213565A1 - Pen-type compass - Google Patents

Abstract

[Problem] To provide a pen-type compass that has excellent portability, facilitates storing and carrying a replacement core and replacing the core, and prevents loss of the replacement core or a component. [Solution] A pen-type compass comprises a needle-side body 12 and a core-side body 11, wherein a core holder 19 for accommodating a core (replacement core) 31 is provided inside one among the needle-side body 12 and the core-side body 11, and a door part 34 for opening and closing the core holder 19 is formed on a surface facing the other body in which the core holder 19 is not provided. Furthermore, the pen-type compass has a core stopper 15 for holding the core and a core stopper nut 14 for fixing the core stopper 15, a recess part 17 for accommodating the core stopper 15 and a through-hole 171 extending from the recess part 17 through the side surface of the core-side body 11 are formed inside the core side body 11. The core stopper 15 includes a protrusion part 153 that protrudes outward from the through-hole 171 and engages with the core stopper nut 14 while being accommodated in the recess part 17.

Description

Pen-shaped compass

The present invention relates to a pen-type compass having excellent portability, and particularly relates to a pen-type compass capable of facilitating operations such as storage and carrying of a replacement core and replacement of a core, and making it difficult to lose the replacement core and parts. ..

[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 to which a needle or a core is attached.
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.

[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, in many conventional pen-type compasses, the replacement core is stored in a small case (container) separate from the main body, which makes it complicated to carry with the compass body, and the core cannot be replaced immediately when necessary. In addition, there was a problem that the replacement core was easily lost.

Furthermore, since the parts for fixing the core to the main body are fine and the number of parts is large, there is a problem that the operation of attaching / detaching the core and determining the position (height) is complicated and difficult to operate, and the parts are easily lost. ..

In Patent Documents 1 to 3, the replacement core can be held inside the main body, the shape of the part that fixes the core is changed, the number of parts is reduced, the operation of attaching and detaching the core is facilitated, and the replacement core and parts are lost. It is not stated to prevent.

The present invention has been made in view of the above-mentioned actual conditions, and the replacement core can be held inside the main body and the core can be replaced immediately when necessary, and the number of parts for fixing the core to the main body can be reduced for operation. The purpose is to provide a pen-type compass that facilitates and prevents loss of replacement cores and parts.

The present invention for solving the above-mentioned problems of the conventional example includes a needle-side main body serving as a leg provided with a needle and a core-side main body serving as a leg to which a core is attached, and the needle-side main body and the core side. It is a pen-type compass that becomes a pen-shaped pen with a substantially cylindrical shape when it is closed together with the main body. The door portion that opens and closes is formed on the surface facing the other main body that is not provided with the wick holder.

Further, in the above-mentioned pen type compass, the wick holder is substantially capsule-shaped, and is provided so as to project from the inside of one main body provided with the wick holder toward the other main body not provided with the wick holder. On the inside of the other main body, a space that can store the protruding portion is formed.

Further, according to the present invention, in the above pen-type compass, the door portion of the wick holder slides along the circumference of the capsule-shaped cylindrical portion to open and close.

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 and a core-side main body as a leg to which a core is attached, and the needle-side main body and the core side are provided. It is a pen-type compass that becomes a pen type with a substantially cylindrical shape when it is closed together with the main body, and has a core fixing part that holds the core and a core fixing nut that fixes the core fixing part to the core side main body. , A recess for accommodating the core stopper and a through hole extending from the recess through the side surface of the core side body are formed inside the core side main body, and the core stopper is housed in the recess. It protrudes outward from the through hole and has a protrusion that engages with the centering nut.

Further, according to the present invention, in the pen-type compass, the core stopper is provided with a slit substantially parallel to the core insertion hole into which the core is inserted.

Further, according to the present invention, in the pen-type compass, the recess is formed so as to narrow toward the through hole, the centering portion is formed so as to narrow toward the protruding portion, and the centering portion is formed in the recess. When the nut for centering is engaged with the protruding part and tightened while the protruding part is projected from the through hole, the side surface of the portion thicker than the end where the protruding part of the centering portion is provided becomes a recess. It is pressed against the inner wall and tightened, closing the slit.

Further, in the present invention, in the above pen type compass, the centering portion and the centering nut are made of elastic resin.

Further, according to the present invention, in the above pen type compass, a wick holder for storing a wick is provided inside the needle side main body, and when the needle side main body and the wick side main body are closed, the door portion of the wick holder has a wick. It is stored in the space formed inside the side body.

According to the present invention, a needle-side main body serving as a leg provided with a needle and a core-side main body serving as a leg to which a core is attached are provided, and when the needle-side main body and the core-side main body are closed together, it is omitted. It is a pen-shaped compass that becomes a cylindrical pen type, and has a wick holder inside one of the main body on the needle side or the wick side main body, and the wick holder is the door part that opens and closes the wick holder. Since it is a pen-type compass formed on the surface facing the other main body that is not provided, a wick holder is provided inside the main body, so the replacement wick can be stored inside the main body and carried with the main body. It has the effect of being able to be used immediately when needed and preventing the loss of the replacement wick.

Further, according to the present invention, the wick holder has a substantially capsule shape, and is provided so as to project from the inside of one main body provided with the wick holder toward the other main body not provided with the wick holder, and the other main body is provided. Since the pen-type compass has a space for storing the protruding part inside, the storage volume can be increased to store multiple wicks, and the needle-side body and wick-side body are closed. It has the effect of holding the pen shape and not impairing portability.

Further, according to the present invention, the door portion of the wick holder is the pen-type compass that slides along the circumference of the capsule-shaped cylindrical portion to open and close, so that the opening and closing operation can be easily performed with a simple configuration. Has the effect of being able to.

According to the present invention, a needle-side main body serving as a leg provided with a needle and a core-side main body serving as a leg to which a core is attached are provided, and when the needle-side main body and the core-side main body are closed together, it is omitted. It is a pen-type compass that becomes a cylindrical pen type, and has a core stopper for holding the core and a core stopper nut for fixing the core stopper to the core side main body. A recess for accommodating the stopper and a through hole extending from the recess through the side surface of the core side main body are formed, and the core retainer is housed in the recess and protrudes outward from the through hole. Since it is a pen-type compass with a protruding part that engages with the centering nut, if the protruding part is inserted into the through hole, it will not come off from the main body even if the centering part is not pressed, and the core can be replaced. It has the effect of greatly facilitating operations such as length adjustment and reducing the number of parts to prevent loss of parts.

Further, according to the present invention, the core stopper portion is the pen-type compass having a slit substantially parallel to the core insertion hole into which the core is inserted, so that the core can be taken in and out when the core stopper nut is loosened. It can be done easily, and when the core fixing nut is closed, the slit is closed and the core can be securely fixed.

Further, according to the present invention, the recess is formed so as to be narrowed toward the through hole, the centering portion is formed so as to be narrowed toward the protruding portion, and the centering portion is housed in the recess and protrudes. When the centering nut engages with the protruding part and is tightened while the part protrudes from the through hole, the side surface of the portion thicker than the end where the protruding part of the centering portion is provided is pressed against the inner wall of the recess. Since the pen-type compass is tightened and the slit is closed, the core can be securely fixed.

Further, according to the present invention, since the centering portion and the centering nut are made of the above-mentioned pen-type compass made of elastic resin, there is an effect that the compass is familiar to fingers, is not slippery, and is easy to operate. ..

It is a perspective view which shows the schematic structure of this compass. It is a partial explanatory view which shows the structure of the tip part of this compass. It is explanatory drawing which shows the inner structure of the core side main body 11. It is explanatory drawing which shows the inner structure of the needle side main body 12. It is explanatory drawing which shows the structure of the tip part of the core side main body 11. It is sectional drawing which shows the state which loosened the nut for centering. It is sectional drawing in the state which tightened the nut for centering. It is explanatory drawing which shows the structure of the wick holder 19. 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 core-side main body to which a core is attached, and the needle-side main body and the core-side main body are closed together. It is a pen type with a substantially cylindrical shape, and has a core holder inside one of the main body on the needle side or the main body on the core side, and the door part that opens and closes the core holder is the core holder. It is formed on the surface facing the other main body that is not provided with, and the replacement wick can be held inside the compass main body, the wick can be replaced immediately when necessary, and the replacement wick can be prevented from being lost. It can be done.

Further, in this compass, a recess for accommodating a core stopper for holding the core and a through hole for penetrating the side surface of the core side body from the recess and communicating with the outside are formed inside the tip portion of the core side main body. The centering portion is housed in the recess, and a part of the centering portion protrudes outward from the through hole, and the protruding portion engages with the centering nut and is tightened, so that the centering portion is recessed. The core is fixed by crimping to the inner wall, and the core stopper is configured as one component to reduce the number of components, facilitate operation, and prevent loss of the component.

In addition, this compass has a slit formed in the axial direction of the centering part, and when the centering nut is loosened, the slit opens to facilitate the insertion and removal of the core, and the centering nut is tightened. Then, the slit is closed and the core can be fixed, and the operation can be facilitated as a simple configuration.

Further, in this compass, the cross-sectional shape of the concave portion is formed so as to be narrowed toward the through hole, and the cross-sectional shape of the centering portion is formed so as to be narrowed toward the protruding portion. By tightening, the core stopper is strongly pressed from the inner wall of the recess to close the slit, and the core can be securely fixed.

[Rough configuration of the pen-type compass according to the embodiment: FIG. 1]
The schematic configuration of this compass will be described with reference to FIG. FIG. 1 is a perspective view showing a schematic configuration of the compass.
As shown in FIG. 1, the compass includes a main body 1 and a cap 2 that covers the tip of the main body 1, and has a shape very similar to a writing instrument such as a ballpoint pen when the legs are closed.
It should be noted that this compass does not have a structure in which a mechanical pencil or a pencil is fixed to the legs of the main body 1, but a structure (core type) in which a lead for the compass is held.

The main body 1 is formed by zinc die casting or the like, and includes a central portion 10, a core side main body 11, a needle side main body 12, a main body connecting portion 13, and a core fixing nut 14.
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, and houses and holds the upper ends of the core side main body 11 and the needle side main body 12.
The core side main body 11 is one leg of the compass, and the core is detachably fixed to the tip.
The needle-side main body 12 is the other leg of the compass, and a needle is provided at the tip thereof.

The main body connection portion 13 includes a screw and a nut, and slides the core side main body 11 and the needle side main body 12 in a state where the core side main body 11 and the upper end portion of the needle side main body 12 are housed inside the central portion 10. Fix as much as possible. The nut of the main body connecting portion 13 is provided on the back side of FIG.
The core-side main body 11 and the needle-side main body 12 can be opened and closed around a point connected by the main body connection portion 13.
The core 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 centering nut 14 has a thread groove formed inside, and engages with the protruding portion of the centering portion as described later. Further, the core fixing nut 14 is made of elastic POM (polyacetal) resin, and is easy to fit in the hand and easy to operate.

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 core 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.

[Structure of the tip of this compass: Fig. 2]
The configuration of the tip of the compass will be described with reference to FIG. FIG. 2 is a partial explanatory view showing the configuration of the tip portion of the compass.
As shown in FIG. 2, in the tip of the compass, the core 31 protrudes from the tip of the core-side main body 11, and the needle 32 protrudes from the tip of the needle-side main body 12. The core 31 is removable so that it can be replaced when it is worn out, but the needle 32 is fixed to the needle side main body 12.

Then, a part of the core fixing portion 15 for fixing the core 31 protrudes from the through hole provided on the side surface of the core side main body 11, and the core fixing nut 14 engages with the protruding portion of the core fixing portion 15. In addition, the core 31 is fixed.
The configuration of the centering portion 15 and the centering nut 14 will be described later.

Further, a recess 16 is provided in a portion where the core 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 core side main body 11 is provided with a recessed portion 16a, and the needle side main body 12 is provided with a recessed portion 16b.
The recessed portions 16a and 16b are similarly formed on the back side of FIG.

[Inside of the core side main body 11: FIG. 3]
Next, the configuration inside the core side main body 11 will be described with reference to FIG. FIG. 3 is an explanatory view showing an inner configuration of the core side main body 11.
As shown in FIG. 3, the inside of the core-side main body 11 has a hollow upper portion, and a recess in the lower portion for accommodating a core stopper 15 for holding the core 31 is formed.
Further, although not shown in FIG. 3, a through hole is provided on the side surface of the core side main body 11 so that a part of the core fixing portion 15 projects. The through hole is formed so as to be substantially orthogonal to the surface (contact surface) that abuts on the needle side main body 12.

[Inside of main body 12 on needle side: FIG. 4]
Next, the structure inside the needle-side main body 12 will be described with reference to FIG. FIG. 4 is an explanatory view showing the inner configuration of the needle side main body 12.
As shown in FIG. 4, a wick holder 19 for accommodating a replacement wick is provided inside the needle-side main body 12. The wick holder 19 can store 3 to 4 replacement wicks.
By providing the wick holder 19, it is possible to carry the replacement wick with the main body, and the wick 31 can be replaced at any time, and the replacement wick does not need to be held in a container separate from the compass main body. It is possible to prevent the loss of the wick.
The configuration of the wick holder 19 will be described later.

[Structure of the tip portion of the core side main body 11: FIG. 5]
Next, the configuration of the tip portion of the core side main body 11 will be described with reference to FIG. FIG. 5 is an explanatory view showing the configuration of the tip portion of the core side main body 11.
As shown in FIG. 5, a recess 17 in which the core stopper 15 is housed is formed inside the tip portion of the core side main body 11, and further, a through hole 171 penetrating the side surface of the core side main body 11 from the recess 17 , A core storage portion 172 is formed in which the core 31 held by the core stopper 15 is stored.
The core 31 can move up and down in the core storage portion 172, and the length of the core 31 (the length of the portion protruding from the core side main body) can be adjusted.
The shape of the recess 17 will be described later.

The core fixing portion 15 for holding the core 31 includes a main body portion of a polygonal prism having a cavity for holding the core 31 inside, and a protruding portion fitted into the through hole 171.
The configuration of the centering portion 15 will be described later, but the surface that comes into contact with the needle-side main body 12 in the state of being housed in the recess 17 is formed flat, and an axial slit is formed in the surface. That is, the slit is provided substantially parallel to the hole into which the core is inserted.

A configuration in which the core 31 is attached and detached and fixedly held in this compass will be described with reference to FIGS. 6 and 7.
[With the core fixing nut loosened: Fig. 6]
First, a state in which the core fixing nut 14 is loosened will be described with reference to FIG. FIG. 6 is a cross-sectional explanatory view showing a state in which the core fixing nut is loosened.
FIG. 6 shows a cross section obtained by cutting a portion of the core side main body 11 of the compass provided with the through hole 171 in the lateral direction, and the lower surface of FIG. 6 abuts on the needle side main body 12. It is a surface, and the upper semicircular surface is the side surface of the core side main body 11.
Then, FIG. 6 shows a cross section in a state where the core fixing portion 15 is inserted into the core side main body 11 and the core fixing nut 14 is loosened.
The core side main body 11 is formed with a recess 17 and a through hole 171 penetrating the side surface.

As shown in FIG. 6, a recess 17 is formed inside the core-side main body 11, and a core stopper 15 is housed therein.
The centering portion 15 is provided with a core insertion hole 151 into which the core 31 is inserted, and a slit 152 is formed from the core insertion hole 151 toward the contact surface (lower surface in FIG. 6).
When the core fixing nut 14 is loosened, the slit 152 is open, which makes it easy to insert and remove the core 31.
The core 31 is inserted into the core insertion hole 151, and when it penetrates, it is stored in the core storage portion 172 of the core side main body 11.

Further, the core fixing portion 15 is provided with a protruding portion 153 that protrudes in the through hole 171 direction of the core side main body 11 on the side opposite to the slit 152.
A thread is formed on the protrusion 153 and engages with the thread groove of the centering nut 14.
The centering portion 15 is also made of the same elastomer resin as the centering nut 14, and is easy to handle with good finger familiarity.

In this compass, the cross-sectional shape of the centering portion 15 is a polygon with a contact surface as one side, and the upper side is narrow and the lower side (contact surface) is wide. That is, the width becomes narrower toward the protrusion 153, and the shape is formed thinner.
Although FIG. 6 shows an example of a hexagon, it may be a trapezoid or an octagon having a contact surface as one side.

The recess 17 of the core-side main body 11 is formed to be one size larger along the cross-sectional shape of the core stopper 15, and is formed so as to narrow toward the through hole 171.
Further, the through hole 171 is formed so as to penetrate the side surface from the recess 17 in a direction substantially orthogonal to the contact surface.
The protruding portion 153 of the centering portion 15 is inserted into the through hole 171.

Conventionally, the configuration for attaching the core is divided into parts that hold the core, screw parts that connect it to the compass body, and nut parts that fix them so that the parts that hold the core do not fall out of the compass body. While holding it down, I had to operate the screw and nut parts well to fix the core.

In this compass, the centering portion 15 is provided with a protruding portion 153, and the portion for holding the core (the main body of the core fixing portion 15) and the portion connected to the compass main body are integrally formed. If the protruding portion 153 is inserted into the through hole 11 of the core side main body 11, the core fixing portion 15 does not come off from the main body even if it is not strongly held by hand, and the operation of attaching and detaching the core can be remarkably facilitated. It is a thing.

Then, as shown in FIG. 6, when the centering nut 14 is loosened, there is a gap between the centering portion 15 and the inner wall of the recess 17, and the slit 152 is also open.
In this state, the core 31 can be attached to and detached from the core insertion hole 151, and the position (height) can be adjusted.

[Tightened nut for centering: Fig. 7]
Next, a state in which the core fixing nut 14 is tightened will be described with reference to FIG. 7. FIG. 7 is a cross-sectional explanatory view of a state in which the centering nut is tightened.
As shown in FIG. 7, when the centering nut 14 is tightened, the centering nut 14 is lowered and comes into contact with the side surface of the core side main body 11, and when further tightened, the centering portion 15 is lifted. ..

At this time, the main body of the core fixing portion 15 is lifted toward the through hole 171 so that the surface of the intermediate portion, which is wider than the upper side, is pressed against the inner wall of the recess 17 of the core side main body 11.
In the example of FIG. 7, the two hypotenuses of the centering portion 15 are pressed against the inner wall of the recess 17, and the slit 152 is closed by being deformed by applying an inward force.
As a result, the core 31 is fixed without coming off from the core insertion hole 152.

By forming the cross-sectional shapes of the centering portion 15 and the recess 17 so that the width becomes narrower toward the through hole 171 so that the surface of the centering portion 15 is efficiently pressed against the inner wall of the recess 17, the core 31 is formed. Can be easily fixed.

[Structure of wick holder 19: FIG. 8]
Next, the configuration of the wick holder 19 will be described with reference to FIG. FIG. 8 is an explanatory diagram showing the configuration of the wick holder 19.
As shown in FIG. 8, the wick holder 19 is provided in the space inside the needle side main body 12 or the wick side main body 11 and holds the wick (replacement wick) 31.
Here, an example in which the wick holder 19 is provided on the needle side main body 12 will be described, but the basic configuration is the same when the wick holder 19 is provided on the core side main body 11, and the illustration and description will be omitted.

As shown in FIG. 8, the wick holder 19 is provided in the space inside the needle-side main body 12 (the side facing the wick-side main body 11), and holds the door portion 34 and the fixed portions 33a and 33b for holding the door portion 34. It has. The outer shape of the wick holder 19 is a capsule shape as a whole, and the dimensions in the longitudinal direction are about 35 to 40 mm, and the dimensions in the lateral direction are about 7 to 8 mm. The length of the space for storing the core 31 is about 23 mm, and a core having a length of about 20 mm can be stored.

Then, about half (vertical half) of the capsule shape of the wick holder 19 is housed inside the needle side main body 12, and the other half protrudes from the needle side main body 12 toward the core side main body 11. As a result, the storage volume of the wick holder 19 can be increased, and a plurality of replacement wicks can be stored.

In addition to the replacement core, a needle that can be inserted into the core stopper 15 can be prepared as a separate part and stored in the core holder 19. By using a needle instead of the core 31 , This compass can be used as a divider.

The fixing portions 33a and 33b are provided at the upper and lower portions of the protruding portions, are fixed to the inside of the needle-side main body 12, and hold the door portion 34 rotatably. Specifically, grooves are provided on the lower side surface of the fixing portion 33a and the upper side surface of 33b, and the protruding portion of the door portion 34 is engaged with these grooves.

The door portion 34 has a semi-cylindrical shape, and the protrusion at the upper end engages with the groove of the fixing portion 33a, the protrusion at the lower end engages with the groove of the fixing portion 33b, and rotates in the direction of the arrow in FIG. Then, the core holder 19 is opened and closed. That is, the door portion 34 rotates along the circumference of the cylindrical portion of the capsule-shaped wick holder 19 to open and close the wick holder 19.
When the door portion 34 is rotated, the door portion 34 is stored along the inner wall of the portion stored in the needle-side main body 12 of the core holder 19, and the core holder 19 is opened.

The protruding semi-capsule-shaped portion (including the door portion 34) of the wick holder 19 is housed in the inner cavity of the wick-side main body 11 when the compass is closed. As a result, even if the wick holder 19 is provided, the pen shape can be maintained in the state where the compass is closed, and the replacement wick can be neatly stored.

In other words, this compass is provided so that the wick holder 19 is stored inside the main body in the closed state and remains pen-shaped, but the wick holder 19 appears when opened, providing a slim shape and operability. It is possible to hold the replacement core together with the main body without damaging it.

Compared to the configuration in which the replacement core is held in a container different from the main body and the configuration in which the storage portion for the replacement core is provided on the outside of the main body, this compass is provided with the core holder 19, so that the replacement core is the main body of the compass. It can be carried together with the wick, and the wick can be replaced immediately when needed, and the replacement wick can be prevented from being lost.
Further, the fixing portions 33a and 33b and the door portion 34 are made of POM (polyacetal) resin to prevent slipping when the user performs an operation of rotating the door portion 34.

Although the wick holder 19 is formed so as to protrude from the needle-side main body 12 toward the core-side main body 11, it is also possible to make the wick holder 19 not so as to protrude from the needle-side main body 12.
In this case, the door portion 34 is formed in a flat shape that does not bend, and the wick holder 19 is opened and closed by sliding the needle-side main body 12 in the length direction (upward or downward direction) or in the lateral direction.

[Application example: Dimension matching of circle]
In the conventional compass, when drawing a circle, the core side main body 11 and the needle side main body 12 are opened, and the distance between the core 31 and the needle 32 is measured with a ruler or the like to adjust the opening degree so as to match the desired radius. Was there.
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 core 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)]
The structure (1) of the scale portion will be described with reference to FIG. 9A and 9B are explanatory views showing the configuration (1) of the scale portion, FIG. 9A shows a protrusion provided on the main body side, and FIG. 9B 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 core 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. 9A, 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 core 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, but may be provided, for example, in the recesses 16a and 16b.

Further, as shown in FIG. 9B, 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 portion 42 with the protrusion portion 21c, the distance between the needle 32 and the core 31 has a corresponding radial dimension.

Specifically, as shown in FIG. 9B, 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 core 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 core 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)]
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. 10A and 10B are explanatory views showing the configuration (2) of the scale portion, FIG. 10A is a state in which the scale portion 5 is attached to the compass, FIG. 10B is an attachment portion on the needle side main body 12, and FIG. The engaging portion in the core 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 core-side main body 11 of the compass, and is shown here when it is attached to the needle-side main body 12.

As shown in FIG. 10A, 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 4, 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 core side main body 11.
The pressing portion 54 is a component that lightly presses the scale portion 5 on the core side main body 11, and a through hole 56 (see FIG. 10 (c)) penetrating in the left-right direction is formed in FIG. 10 (a). The scale portion 5 penetrates the 56, and the pressing portion 54 slides on the scale portion 5 as the core 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, the user adjusts the length of the desired radius to the scale alignment portion 55 with the scale line 51 as a guide while opening and closing the core side main body 11 and looking at the scale line 51 of the scale portion 5 through the transparent pressing portion 54. As a result, the distance between the needle 32 and the core 31 of the compass becomes the length of the radius.

Further, as shown in FIG. 10B, 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. 10 (c), a holding portion 54 is attached to the recessed portion 16a of the core 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.

[Effect of Embodiment]
According to this compass, it is a pen-type compass, and a wick holder 19 for storing a wick (replacement wick) 31 is provided inside one of the main body 12 on the needle side or the main body 11 on the core side, and the wick holder 19 is opened and closed. The door portion 34 is formed on the surface facing the other main body to which the wick holder 19 is not provided, and the replacement wick can be held inside the compass main body, and the wick can be replaced immediately when necessary. , It has the effect of preventing the loss of the replacement core.

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.

Further, according to this compass, inside the tip portion of the core side main body 11, there is a concave 17 portion in which the core fixing portion 15 for holding the core 31 is housed, and an external portion is penetrated from the concave portion 17 to the side surface of the core side main body 11. A through hole 171 leading to the center is formed, and the centering portion 15 is provided with a protruding portion 153 that projects outward from the through hole and engages with the centering nut 14 in a state of being housed in the recess 17. Therefore, if the centering portion 15 is stored in the recess 17 and the protruding portion 153 is inserted into the through hole 171 of the core side main body 11, the centering portion 15 can be removed from the main body even if the operator does not hold it by hand. It can be held so that it does not come off, and by tightening the centering nut 14 to the protruding 153 part, the centering part 15 is crimped to the inner wall of the recess 17 to fix the core 31, and the core can be attached and detached. The entire adjustment operation can be made much easier, and the number of parts can be reduced to prevent the parts from being lost.

Further, according to this compass, since the slit 152 is formed in the core fixing portion 15 along the core insertion hole 151, the slit 152 is opened in the state where the core fixing nut 14 is loosened, and the core 31 is opened. In addition to facilitating loading and unloading, when the core fixing nut 14 is tightened, the slit 152 is closed, which has the effect of securely fixing the core 31.

Further, according to the present compass, the width of the cross-sectional shape of the recess 17 is formed so as to be narrowed toward the through hole 171 and the width of the cross-sectional shape of the centering portion 15 is narrowed toward the protruding portion 153. By tightening the core fixing nut 14, a portion wider than the upper part is pressed against the inner wall of the recess 17, which has the effect of reliably fixing the core 31. ..

Further, according to this compass, since the centering portion 15 and the centering nut 14 are made of elastic POM (polyacetal) resin, they are not slippery and have an effect of being easy to operate.

Further, according to this compass, since the wick holder 19 is provided inside the needle side main body 12, it is not necessary to manage the wick in a separate case, and there is an effect that the wick can be prevented from being lost.

The present invention is suitable for a pen-type compass that has excellent portability, facilitates operations such as core replacement, and makes it difficult for parts to be lost.

1 ... Main body, 2 ... Cap, 4, 5 ... Scale part, 10 ... Central part, 11, 11'... Core side main body, 12, 12' ... Needle side main body, 13 ... Main body connection part, 14 ... Center fixing nut , 15 ... core stopper, 16 (16a, 16b) ... recess, 17 ... recess, 19 ... core holder, 21a, 21b, 21c ... protrusion, 31 ... core, 32 ... needle, 33 (33a, 33b) ... Fixed part, 34 ... Door part, 41a, 41b, 42 ... Hole part, 51 ... Scale line, 52, 53 ... Fixed part, 54 ... Holding part, 55 ... Scale matching part, 56,171 ... Through hole, 151 ... Core Insertion hole, 152 ... Slit, 153 ... Protruding part, 172 ... Core storage part

Claims (7)

1. A needle-side main body that serves as a leg to which a needle is provided and a core-side main body that serves as a leg to which a core is attached are provided, and when the needle-side main body and the core-side main body are closed together, a pen having a substantially cylindrical shape is provided. It ’s a pen-shaped compass that serves as a mold.
   A wick holder for storing the wick is provided inside one of the needle-side main body or the wick-side main body.
   A pen-type compass in which a door portion for opening and closing the wick holder is formed on a surface facing the other main body to which the wick holder is not provided.
2. The wick holder has a substantially capsule shape, and is provided so as to project from the inside of one main body provided with the wick holder toward the other main body not provided with the wick holder.
   The pen-type compass according to claim 1, wherein a space capable of accommodating the protruding portion is formed inside the other main body.
3. The pen-type compass according to claim 1 or 2, wherein the door portion of the wick holder slides along the circumference of the capsule-shaped cylindrical portion to open and close.
4. A core stopper that holds the core and
   It has a core fixing nut for fixing the core fixing portion to the core side main body.
   A recess for accommodating the core stopper and a through hole extending from the recess through the side surface of the core body are formed inside the core body.
   The pen according to any one of claims 1 to 3, wherein the centering portion is housed in the recess and protrudes outward from the through hole and has a protruding portion that engages with the centering nut. Type compass.
5. The pen-type compass according to claim 4, wherein the core stopper has a slit substantially parallel to the core insertion hole into which the core is inserted.
6. The recess is formed so that it narrows toward the through hole.
   The centering portion is formed so as to taper toward the protruding portion.
   When the centering nut is engaged with the protruding portion and tightened in a state where the centering portion is housed in the recess and the protruding portion protrudes from the through hole, the protruding portion of the centering portion is provided. The pen-type compass according to claim 4 or 5, wherein the side surface of a portion thicker than the end portion is pressed against the inner wall of the recess and tightened, and the slit is closed.
7. The pen-type compass according to any one of claims 4 to 6, wherein the centering portion and the centering nut are made of an elastic resin.

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