JPH07257091A - Ruler - Google Patents

Abstract

PURPOSE:To provide a ruler with the capability of being rotatable with the origin as its center. CONSTITUTION:Legs 6 are provided at each portion on the lower side surface 12 of a ruler. In addition, a fixing pin 4 is provided on a position corresponding to the origin of the lower side surface 12. Lower end portions of the fixing pin 4 and legs 6 are positioned at almost the same surface. The fixing pin 4 and legs 6 are formed integrally with the main body of the ruler by the use of transparent resin. In this way, secure positioning of the origin can be done with reduced likelihood of the increase of manufacturing costs. Furthermore, paper is not to be stained by grazing or the like of ink.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ruler capable of fixing a rotation center.

[0002]

2. Description of the Related Art When drawing a plurality of radial lines,
If the ruler can be rotated around a predetermined position (for example, the origin), the workability will be improved. Therefore, various structures have been conventionally proposed in order to enable the rotation of such a ruler. For example, there is a technique in which an overhanging portion having pores is provided at the origin. This means that the ruler can be rotated while the position of the origin is fixed by rotating the ruler with the pen tip inserted in the pore.

There is also a technique in which a concave portion (or step portion) is provided at the origin position of the edge used for drawing a line. This is because by rotating the ruler while pressing the ruler against the side of the pen tip in a state where the pen tip is located in the concave portion (or the step portion), it is possible to rotate without causing displacement of the origin. . Further, various examples have been proposed in which a ruler is provided with a compass function and a structure similar to that of the above technique is provided. In this case, there is an example in which a dedicated metal pin for fixing the origin is prepared separately from the ruler body.

[0004]

However, in the above-mentioned conventional technique, it is preferable that the size of the pores and the nib be substantially equal to each other in order to minimize the positional deviation. However, since the pen tips of commercially available pens have various thicknesses, it is necessary to make the pores large to some extent. As a result, very accurate positioning could not be expected.

Furthermore, since the pen tip is used as a "pin" for fixing the center of rotation, the pen tip remains in the original position of the paper for a long time. Therefore, there is a problem that a large amount of ink is ejected at the center position of rotation, bleeding easily occurs, and the line becomes thick. In the technology in which a dedicated pin is separately prepared, there are problems such as an increase in manufacturing cost and loss of the pin.

Further, conventionally, there has been a demand for a more versatile and convenient ruler. An object of the present invention is to provide a rotation center fixing structure for a ruler that can rotate the ruler without causing displacement of the rotation center, and a ruler including the same. The present invention provides a rotation center fixing structure of a ruler and a ruler including the rotation center fixing structure capable of continuously drawing a plurality of radial line segments without causing displacement of a rotation center, rubbing of ink, and the like. To aim.

An object of the present invention is to provide a ruler capable of drawing a circle or a circular arc. An object of the present invention is to provide a ruler capable of drawing a broken line or the like.

[0008]

The present invention has been made to achieve the above object, and a first aspect thereof is as follows.
A ruler characterized by having a main body having a ruler side used for drawing a line, and a fixing pin provided at a position along the ruler side on the surface of the main body facing the paper when used. Will be provided.

According to a second aspect of the present invention, the main body, a scale indicating the length provided on the main body, and the surface of the main body facing the paper at the time of use are located at a position corresponding to the origin of the scale. There is provided a ruler characterized by having a fixing pin provided. As a third aspect of the present invention, a main body, a scale indicating an angle drawn on the main body, and a surface of the main body facing the paper at the time of use are provided at positions corresponding to the angular centers of the scale. A ruler is provided that includes a fixing pin.

In each of the first to third aspects, it is preferable to further have a foot provided on the surface. Further, it is more preferable that the lower end portion of the fixing pin and the lower end portion of the foot are substantially on the same plane. As a fourth aspect of the present invention, a main body, a hole provided in the main body into which a pen tip can be inserted, and a surface of the main body that faces the paper when in use are provided at a predetermined distance from the hole. And a fixed pin provided therein.

According to a fifth aspect of the present invention, a main body and a fixing pin are provided, and the main body is placed on the paper at a surface facing the paper when the paper is placed on the paper for use. A grounding part that touches the paper in a closed state and a non-grounding part that does not contact the paper when placed on the paper, and the fixing pin is arranged in the non-grounding part. A ruler to do so is provided.

It is preferable that the lower end of the fixing pin is substantially flush with the paper when the main body is placed on the paper. Further, it is more preferable that the height position of the lower end portion of the fixing pin is substantially on the same plane as the ground contact portion. Further, it is preferable that the main body includes a ruler side used to draw a line, and the non-ground portion includes a region along the ruler side. In this case, it is more preferable that the fixing pin is provided below the ruler side. The height position of the lower end of the fixing pin is
It is more preferable that the position is higher than the ground contact portion. Further, it is more preferable that the non-grounded portion includes a region that is convex outside a straight line connecting the boundary position between the grounded portion and the non-grounded portion and the ruler side.

Further, the region including the fixing pin in the non-grounded portion may be bent downward independently of the surrounding region. The fixing pin may be provided on a lower surface of the main body at a position along the ruler side. The scale may be provided on the main body to indicate the length, and the fixing pin may be provided at a position corresponding to the origin of the scale.

It is possible to provide a scale showing an angle drawn on the main body, and the fixing pin may be provided at a position corresponding to an angular center of the scale on the lower surface of the main body. The pen may have a hole into which the pen tip can be inserted, which is provided at a predetermined distance from the fixing pin. In this case, it is more preferable that a plurality of the holes be provided, and the holes be arranged in rows according to a specific repeating pattern. The repeating pattern may include any of a dotted line, a broken line, a one-dot chain line, and a two-dot chain line. It is preferable to further have a scale indicating a radius of an arc that can be drawn by inserting a pen into the hole and rotating the fixing pin as a center.

In the first to fifth aspects, the fixing pin is preferably transparent. The fixing pin is preferably made of resin. The fixing pin is preferably formed integrally with the main body. Further, it is preferable to have a concave portion provided at a position corresponding to the fixing pin on the upper surface of the main body.

According to a sixth aspect of the present invention, there is provided a main body having a ruler side used for drawing a line, and a sheet member provided on the main body so as to protrude from the ruler side. A ruler characterized by is provided. In this case, it is preferable that a scale indicating the length is provided on the main body, and the sheet member is provided at a position corresponding to the origin of the scale.

According to a seventh aspect of the present invention, there is provided a main body, a scale provided on the main body for indicating an angle, and a sheet member provided at a position corresponding to an angular center of the scale. A featured ruler is provided. The sixth,
In the seventh aspect, it is preferable to have a housing portion that can house at least a part of the sheet member.

As an eighth aspect of the present invention, a thin plate member having one or more holes into which a pen tip can be inserted, and a reference position display showing a position on the thin plate member as a rotation center. There is provided a ruler characterized by including a radius display scale indicating a distance from the rotation center position and the hole. It is preferable that the reference position display and the radius display scale are provided on the thin plate member.

The term "main body" referred to in claims 1 to 6 is a concept not including the foot 6 in the embodiments described later. On the other hand, the term "main body" as used in claims 7 to 21 is a concept including the foot 6 in the embodiments described later.

[0020]

The operation of the first to fifth aspects will be described. Place the ruler on the paper at the desired location. When the upper position of the fixing pin is pushed downward with a finger or pen, the fixing pin comes into contact with the paper. Therefore, in this state, the ruler can be rotated around the fixed pin. The ruler can be appropriately rotated to draw a line, measure an angle, or the like. By using holes arranged at a predetermined distance from the fixing pin, a circle, a dotted line or the like can be drawn. It should be noted that if the position to be pressed by the pen or the like is concave, the pen or the like will not slip.

If the fixing pin and the main body are integrally molded using a transparent resin, the manufacturing is easy. In addition, since the lines and points located below the fixing pin can be seen, positioning is easy. The operation of the sixth and seventh aspects will be described. Hold the desired position of the sheet member with a pen. Then, the pressed portion is deformed so as to project downward. As a result, it becomes possible to rotate the ruler around the projecting deformation portion.

The operation of the eighth aspect will be described. While holding the center of rotation indicated by the reference position display of the thin plate member with the pen tip, insert another pen into the hole and draw a circular arc so as to rotate the ruler. Since the radius indication scale is drawn on the thin plate member, it is not necessary to strictly define the attachment position even if the thin plate member is attached to the main body of the ruler or the like.

[0023]

Embodiments of the present invention will be described with reference to the drawings. A first embodiment will be described with reference to FIGS. The ruler 1 of this embodiment includes a main body having a ruler side 2, a fixing pin 4,
The pressing portion 5 and the foot 6 are provided.

The ruler 1 is made by molding a transparent resin (eg acrylic). Therefore, the entire ruler 1 is transparent, and the lines, points, etc. under the ruler can be seen through the ruler 1. This point is basically the same for the other embodiments. Ruler side 2
Is an edge portion for drawing a straight line. The ruler side 2 includes
A scale 20 and a scale number 22 are provided. The scale 20 is drawn in three types of 1 mm intervals, 5 mm intervals, and 1 cm intervals (however, 1 mm intervals are not drawn in the drawing).

The fixing pin (or fixing protrusion) 4 is for fixing the center of rotation when the ruler 1 is rotated to the paper. An enlarged view of the peripheral portion of the fixing pin 4 is shown in FIG. Further, a sectional end view taken along the line AA is shown in FIG.
The fixing pin 4 is configured as a substantially semispherical protrusion. The protrusion amount (height of the protrusion) W1 from the lower side surface 12 is almost the same as that of the foot 6 described later. However, the specific shape and protrusion amount of the fixing pin 4 are not limited to this. The fixing pin 4 is transparent like the other parts of the ruler 1. Therefore, even if the fixing pin 4 is located on the line or point drawn on the paper, the line or point can be seen through the fixing pin 4. Therefore, the fixed pin 4 can be accurately aligned with a desired position on the paper.

In this embodiment, the fixing pin 4 is located at the origin position of the scale 20 on the lower side surface 12 of the ruler 1 (hereinafter referred to as "origin 24"), strictly speaking, slightly outside the ruler side 2 (in FIG. 2). (Downward direction) It is placed in a position where it approaches. The protrusion amount ΔW is determined in consideration of the thickness of the pen. Considering that the thickness of a pen that is normally used is in the range of 0.1 to 1.0 mm, it is preferable to set the protruding amount ΔW in the range of about 0.05 to about 0.5 mm. Furthermore, the thickness of the pen that is most frequently used is
Since it is 0.5 mm, the amount of protrusion ΔW is about 0.25 m
It is preferably m. However, the whole fixing pin 4 does not need to be in such a position. It suffices that at least the portion (here, the lower end portion of the fixing pin 4) that comes into contact with the paper when fixing the rotation center is in such a position. In this way, by placing the fixed pin at a position protruding from the line drawing edge (here, the ruler side 2), the center of rotation is placed on the line actually drawn (or on an extension of the line). be able to. However, even if the protrusion amount ΔW is set to 0, if the pen is tilted slightly to draw a line, the accuracy and workability are somewhat reduced, but the position at which the pen passes the rotation center (in this case, the ruler side 2 You can draw a line at the position directly below. Furthermore, even if it is slightly negative (that is, the ruler side 2
Similarly, it is not impossible to draw a line that passes through the center of rotation.

When the fixing pins 4 are provided at a plurality of places, the protruding amount ΔW for each fixing pin 4 is set.
May be changed. In this way, the user
The ruler can be fixed by using the fixing pin 4 which is optimum according to the thickness of the pen used. The pressing portion 5 is a ruler 1
This is a portion to be pressed by a finger, a pen or the like in order to press the fixing pin 4 against the paper when rotating the. The pressing portion 5 of this embodiment is the fixing pin 4 on the upper surface 10 of the ruler.
Is formed as a mortar-shaped recess at a position just opposite to the position (this corresponds to the "recess" referred to in claim 25). However, the shape of the pressing portion 5 is
The present invention is not limited to this, and for example, a columnar protrusion may be held by the pad of the finger. Further, its position does not have to be a position right above the fixed pin 4. It does not matter even if the position is slightly deviated from just above the fixing pin 4.

In this embodiment, a portion (overhanging portion 26) overhanging from the ruler side 2 is provided, and at least a part of the fixing pin 4 and the pressing portion 5 are arranged here. A reference line 21 indicating the position of the fixing pin 4 is drawn on the projecting portion 26. As a result, the center position of rotation can be confirmed and determined more accurately. The feet 6 are for preventing the lower side surface 12 of the ruler from directly touching the surface of the paper to prevent ink fading. The foot 6 is formed as a substantially semispherical convex portion on the lower side surface 12 of the ruler (see FIG. 4). In order to prevent the ruler 1 from being tilted, the feet 6 are arranged at various places on the ruler lower side surface 12. This location is determined in consideration of the position of the fixing pin 4. That is, when the pressing portion 5 is pressed downward,
The ruler 1 is arranged so as to prevent a part of the ruler 1 from being lifted (Note: However, in the embodiment described later, the lift of the ruler 1 is positively used). As described above, the protrusion amount W of the foot 6
2 is substantially the same as the protruding amount W1 of the fixing pin 4. In addition, the foot 6 also serves to prevent wear of the fixing pin 4.

In this embodiment, when the ruler is placed on the paper for use, the foot 6 touches the paper (ground portion). The lower end portion of the foot 6 and the lower end portion of the fixing pin 4 are at substantially the same height position (or substantially on the same plane) (FIG. 5 (b)).
reference). When the height position of the surface on which the foot 6 is provided is different from the height position of the surface on which the fixing pin 4 is provided, naturally, the height positions of the lower end portions of both are on substantially the same plane. The lower surface 12 does not touch the paper (non-grounded portion).

The method of use will be described with reference to FIG. Ruler 1
On the paper and position the fixing pin 4 at the desired location. In this case, the presence of the fixing pin 4 does not cause the ruler to tilt. This is because the feet 6 are provided at various places. Further, since the fixing pin 4 and the periphery thereof are transparent, it is possible to perform accurate positioning while observing the lines and points under the ruler 1. Furthermore, reference line 2
1 helps this.

The pressing portion 5 is pressed with a finger or a pen, and the ruler 1 is rotated as it is until the ruler side 2 reaches a desired angular position. In this case, since the pressing portion 5 is pressed, the fixing pin 4 is strongly pressed against the paper. Therefore, the rotation of the ruler 1 is performed around the position of the fixing pin 4. In this embodiment, since the pressing portion 5 is a mortar-shaped recess, the ruler 1 can be easily rotated by pressing it with the nail instead of the ball of the finger. Further, by forming the mortar-shaped concave portion in this manner, the position where the nail or the pen tip is slid and pressed does not shift. Fixing pin 4
Although the lower end of the foot and the lower end of the foot 6 are at substantially the same height position, since the fixing pin 4 is particularly strongly pressed against the paper, the existence of the foot 6 becomes an obstacle when the ruler 1 is rotated. There is no such thing. On the other hand, since the posture of the ruler 1 is stable due to the presence of the foot 6, there is no positional deviation in the middle.

After the ruler 1 reaches the desired angular position, a line is drawn along the ruler side 2 with a pen while holding the ruler 1 by hand so as not to move carelessly. After this, by repeating the rotation of ruler 1 and the drawing of lines,
Radially positioned lines can be accurately drawn as shown in FIG. As described above, the fixed pin 4 is arranged at a position protruding from the ruler side 2 by a predetermined amount ΔW. Therefore, when all these lines are extended, they intersect at the center position of the rotation (the position where the fixing pin 4 was in contact with the paper). In addition, even if lines are drawn continuously, the lower side 12 of the ruler is kept floating from the paper by the foot 6,
The ink will not spread.

The specific shape of the fixing pin 4 is not limited to that shown in FIG. For example, as shown in FIG. 7B, it may be formed in a substantially conical shape with a sharp tip (lower end). By doing so, the tip of the fixing pin 4 bites into the paper as if it pierces, so that the center of rotation can be more reliably fixed. Moreover, since the trace of the tip of the fixing pin 4 remaining on the paper remains, it is easy to confirm the position of the rotation center after drawing a line. In this case, in order to prevent the paper from being damaged more than necessary, the fixing pin 4 may be configured to be slightly lower than the foot 6 (the protrusion amount W1 ′ is smaller than the protrusion amount W2). Even in this case, there is no problem in use because the entire ruler 1 is bent when the pressing portion 5 is pressed and the tip of the fixing pin 4 can reach the paper. When the tip of the fixing pin 4 is sharp and dangerous, as shown in FIG. 8, the fixing pin 4 is made of a highly elastic material (for example, rubber or silicon resin).
May be covered (indicated by reference numeral 42 in the drawing, hereinafter referred to as "cover member")). In this way, it is possible to prevent the fixing pin from breaking. The material is also preferably transparent. Even in this way, the pressing portion 5
When is pressed, as shown in FIG. 9, the cover member 42 is deformed to expose the tips of the fixing pins 4 and reach the paper.

As shown in FIG. 7A, the fixing pin 4
If the shape is a combination of the truncated cone 400 and a small and pointed projection 402 provided in the center of the bottom surface, the paper will not be damaged more than necessary. Further, since the bottom surface 401 of the truncated cone 400 is parallel to the paper, the fixing pin 4
It is easy to check the position of the line on the lower side. The hole 41 may be provided at the center position (see FIG. 10) of the fixing pin 4 so that a mark indicating the center position of rotation can be attached with a pen. If the deepest part of the pressing portion 5 is displaced from the position of the hole 41, it is possible to press the pressing portion 5 with the pen tip even in this case (see FIG. 10). Alternatively, the holes 41 (a total of four) may be provided at the position of the cross that surrounds the fixing pin 4.

The positional relationship between the pressing portion 5 and the fixing pin 4 will be described. As described above, the pressing portion 5 does not need to be located directly above the fixing pin 4. When pressing the pressing part 5,
The positions of the fixing pin 4 and the fixing pin 4 may be slightly deviated from each other as long as they are pressed against the paper more strongly than the foot 6. (Note: However, this also relates to the position of the foot 6. It is necessary to prevent the foot 6 from being provided too close to the fixing pin 4. The pressing portion 5 may be provided so as to be displaced inward of the ruler side 2 (see FIG. 11). With the configuration shown in FIG. 11, the area (overhanging portion 26) overhanging from the ruler side 2 is minimized and the area that cannot be used to draw a line (the existence of the overhanging is an obstacle) ( (Indicated by the symbol Wd in FIG. 11) can be made as small as possible.

In this embodiment, the foot 6 is used to stabilize the posture of the ruler and to prevent the ink from being rubbed.
Was provided. Even if the actual protrusion amount W1 of the fixing pin 4 is small (for example, about 1 mm or less), the above function can be exerted. Therefore, even if the foot 6 is not provided, the ruler is stable to some extent. As described above, in this embodiment, the ruler can be rotated around the position of the fixing pin 4. Therefore, it is possible to draw a plurality of radially positioned line segments quickly and accurately. Further, the fixing operation of the rotation center is also easy. Further, since the fixing pin 4 is integrated with the ruler 1, it will not be lost. Also, unlike metal needles, it is safe. Further, since a special mechanism for moving the fixing pin 4 up and down is unnecessary, the reliability is high and the manufacturing cost is low. Since the fixing pin 4 is transparent, it is easy to confirm the position of the rotation center.

In this embodiment, the entire ruler 1 is transparent. However, the entire ruler 1 does not necessarily have to be transparent. If at least the fixing pin 4 and its peripheral portion are transparent, it is possible to facilitate the position confirmation. In this embodiment, the entire ruler 1 is integrally formed by resin molding or the like. However, the entire ruler 1 need not be integrally molded. The fixing pin 4 (and its peripheral portion) may be separately prepared and joined to the main body of the ruler 1. If the fixing pin 4 is made sufficiently thin, the fixing pin 4
It does not have to be transparent. For example, the fixed pin 4 may be made of metal. Even in this case, if the cover member 42 shown in FIG. 8 is provided, safety is not impaired. However, considering the manufacturing cost and the like, it is preferable to integrally mold the entire ruler using a transparent material as in this embodiment.

As described above, the fixing pin 4 can be integrally formed with the other part of the ruler 1. Therefore, the manufacturing cost does not increase when the fixing pin 4 is provided. The position where the fixing pin 4 is provided may not be the position corresponding to the origin 24. When a plurality of fixing pins 4 are provided, the fixing pins 4 function as legs 6 with each other.

The second embodiment will be described with reference to FIG.
The ruler of this embodiment is a protractor. In the ruler, a reference line 31 is drawn at a position inside the edge portion 3 by a predetermined amount. Then, one point on the reference line 31 (hereinafter, "angle center 34")
Angle scale 30 and an angle scale number 32 are provided. The fixing pin 4 is provided at the position of the angle center 34 on the ruler lower side surface 12.

The protractor of this embodiment can also be rotated about the position of the fixed pin 4, that is, the angle center 34. Therefore, it is convenient when measuring an angle exceeding 180 degrees. In this embodiment, since the foot 6 is not provided, the entire ruler is slightly tilted. Any part of the lower side of the arc-shaped edge where the scale 30 is provided hits the paper (grounding part). Therefore, the angle scale 30
If the direction of the fixing pin 4 and the like are designed in consideration of this inclination, more accurate measurement can be performed. It goes without saying that the foot 6 may be provided for the same purpose as in the first embodiment.

In the present embodiment, it is possible to quickly measure a larger angle that exceeds the range of the provided angle scale (180 degrees in this embodiment). The effects in terms of manufacturing cost and the like are similar to those of the first embodiment. A third embodiment will be described with reference to FIGS. The present embodiment is a ruler having both a protractor and a straight line ruler.

In the ruler of this embodiment, similarly to the first embodiment, the fixing pin 4 is provided at the position of the origin 24 of the ruler side 2 and slightly protruding from the ruler side 2 ( (See FIG. 13). Similar to the above embodiment, the amount of protrusion Δ
W is determined in consideration of the thickness of the pen (see FIG. 14). The angle scale 30 has the angle center 34 at the position of the fixing pin 4 as in the second embodiment. In this embodiment, the lowermost end of the fixing pin 4 is located directly below the edge 3 '(this means that the reference line 31 of the angle scale 30 is aligned with the position of the edge 3'. (See FIG. 14). The fixing pin 4 is arranged so as not to project outside the edge 3 '. This is to minimize the area where a line cannot be drawn.

The pressing portion 5, the foot 6, etc. are basically the same as those in the above embodiment. In this embodiment, the foot 6 touches the paper in the use state (grounding portion). The lower side surface 12 does not touch the paper (non-grounded portion). In the present embodiment, the center of rotation of the ruler (position of the fixing pin 4) coincides with the angle center 34, so that the angle can be accurately aimed. Also, if a line is drawn using the ruler side 2, the lines located radially can be drawn at an accurate position. The present embodiment is convenient because it is possible to draw straight lines that are radially located continuously while making an angle.

In the present embodiment, the angle θ between the edge 3'and the ruler side 2 is 90 degrees. Therefore, it is possible to draw the orthogonal line that is most frequently used without rotating the ruler. The angle θ is not limited to this. For example, it may be 30 degrees, 60 degrees, or the like (see FIG. 15). In this way, the reference line 31 can be drawn on the side of the edge 3 ', so that the positioning of the ruler, the measurement of the angle, etc. can be facilitated. However, even in this case,
The shape around the fixing pin 4 is preferably determined from the same viewpoint as in FIG. This is to reduce the area in which the line cannot be drawn as much as possible, as described above. Conversely, the angle θ may be larger than 90 degrees. Further, as shown in FIG. 16, the region on the right side of the fixing pin 4 may be cut off. By doing so, the width of the entire ruler (width in the left-right direction in FIG. 16) can be reduced, which is convenient for carrying. It is also easy to use. Furthermore, it looks good if the shape of the entire ruler is as shown in FIG. In the example of FIG. 17, the bottom view is symmetrical with the plan view.

This embodiment can obtain the same effect as the above embodiment. Furthermore, when drawing the radial line segments, the angular position of each line segment can be determined and the actual drawing can be performed at once, resulting in high work efficiency. Also, you can draw more accurately. A fourth embodiment of the present invention is shown in FIG.
This will be described using 8. In this embodiment, a portion (height) 13 having a height position different from that of the lower surface 12 is provided on the back side of the ruler, that is, a region (non-grounded portion) that does not contact the paper when placed on the paper. The fixing pin 4 is arranged here. In this embodiment, the lower surface 12 touches the paper in use (grounding portion). The height position of the tip (lowermost end) of the fixing pin 4 is almost the same as that of the lower side surface 12 (that is,
It is on the same plane as the lower side surface 12) (FIG. 18 (a),
(See (c)). The positional relationship with the ruler side 2 when the ruler is viewed from above is determined from the same viewpoint as in the above-described embodiments (see FIG. 18A). In the present embodiment, the pressing portion 5 has a cylindrical shape protruding upward from the upper side surface 10. Needless to say, a mortar-shaped recess may be formed as in the other embodiments.

The method of use is the same as in the above-mentioned embodiment.
In this embodiment, since the area of the ground contact portion is large, the ruler is more stable. Since most of the back side of the ruler side 2 contacts the paper, it is possible to measure the length more accurately. The configuration of the present embodiment is useful when applied to the case where the lower surface 12 is brought into close contact with the paper when drawing a line (for example, an example of a ruler having both a dotted line function and a compass function described later).

The upper side surface 10 and the lower side surface 12 of the ruler need not be parallel to each other. This applies not only to this embodiment but also to other embodiments. The lowermost end of the fixing pin 4 may be located higher than the lower side surface 12 as long as the function of fixing the rotation center is not impaired. In this regard, the same applies to the relationship between the foot 6 and the fixing pin 4 in the above-described embodiment.

A fifth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 19, the ruler of the present embodiment has the back side processed into a taper shape (inclination) along the ruler side 2 (indicated by reference numeral 14 in the figure. Hereinafter, simply referred to as “tapered surface 14”. ). Normally, when the ruler is placed on the paper for use, only the lower side surface 12 touches the paper (ground portion), while the tapered surface 14 does not touch the paper (non-ground portion).

The taper surface 14 is provided with a fixing pin 4 below the origin 24 of the ruler scale 20. The fixing pin 4 does not project outside the ruler side 2 when the ruler is placed on the paper. Further, in this state, the lowermost end portion of the fixing pin 4 is located higher than the lower side surface 12 and does not touch the paper (claim 12).
Corresponding to the section). The fixed pin 4 is oriented so as to be substantially perpendicular to the tapered surface 14. The structure and manufacturing method of the fixing pin 4 itself are the same as those in the above-mentioned embodiment.

The method of use will be described. When the ruler is simply placed on the paper, the tapered surface 14 does not touch the paper (this state is drawn by a solid line in FIG. 20). To rotate the ruler, push downward near the upper part of the fixing pin 4 of the ruler. Then, the ruler is tilted with the boundary portion between the tapered surface 14 and the lower side surface 12 (hereinafter referred to as "fulcrum position p1") as a fulcrum, and the fixing pin 4 contacts the paper. (In FIG. 20, this state is shown by a two-dot chain line). Therefore, the ruler can be rotated about the fixing pin 4 in the plane of the drawing while maintaining this state. After rotating by a desired angle, the force pressing downward around the fixing pin 4 is removed. Then, the ruler returns to the state drawn by the solid line in FIG. 20 again, and the line can be drawn in this state.

Length W from fulcrum position p1 to fixing pin 4
3 is longer than the length W4 from the fulcrum position p1 to the position p2 just below the ruler side 2. Therefore, the fixing pin 4 comes into contact with the paper at a position p3 outside the position p2 (on the right side in FIG. 20). Therefore, this length W3 and the length W4
By setting the difference (Δw34) to be just half the thickness of the pen tip, the center of rotation of the ruler (that is, the position p3 where the fixing pin 4 was in contact) is passed. You can draw a line.

This embodiment can obtain the same effect as the above embodiment. Further, in the present embodiment, the fixing pin 4 does not extend outside the ruler side 2 in a normal use state (state depicted by a straight line in FIG. 20). Therefore, the existence of the fixing pin 4 does not become an obstacle when drawing a straight line. That is, the ruler of this embodiment is useful for accurately drawing a plurality of lines that are radially located and intersect each other, as shown in FIG. 6B.

Further, in this embodiment, since the fixing pin 4 does not normally touch the paper, there is almost no risk of abrasion. In the present embodiment, the entire region along the ruler side 2 on the back side of the ruler is configured so as not to touch the paper (the above-mentioned tapered surface 14), and the fixing pin 4 is arranged here. . However, the shape of the area that does not touch the paper does not necessarily have to be a tapered surface. For example, in FIG.
As described above, the lower surface 12 and the surface on which the fixing pin is provided may have a step 14 at the boundary and a different height position. Further, as shown in FIG. 22, by providing the feet 6, the entire lower side surface 12 may be prevented from touching the paper. In the example of FIG. 22, the contact position between the foot 6x and the paper is the fulcrum p.
It becomes 1.

Further, as shown in FIG. 23, the portion corresponding to the tapered surface 14 may be formed into a curved surface 14 "which is convex outward (this is an example corresponding to claim 13). In this case, as shown in Fig. 24, as the ruler is tilted, the position on the paper serving as the fulcrum and the part of the ruler are changed. The non-tilted state is drawn by a dashed-dotted line, and Δw34 ′ in this case is w4,
w3 '(= distance along the curved surface 14 "between the initial fulcrum position p1 and the fixed pin 4), so a sufficient size of Δw34' is secured without making the ruler extremely thick. Also, when the ruler is tilted, the position is less likely to be displaced.
4 ”, but some“ not songs ”
It goes without saying that it may be configured as a set of flat surfaces.

In the present embodiment, the positional relationship between the region (ground portion or ground region) on the back surface of the ruler that touches the paper and the fixing pin,
The height position of the lowermost end of the fixing pin is particularly important. Therefore, these will be explained again here. The fixing pin 4 needs to be provided outside the one region that surrounds the entire grounding portion and has a contour that protrudes outward.
For example, let us consider a case where the portion that contacts the paper has a contour as shown in FIG. 25A when the ruler is viewed from above.
The contour has an inwardly convex portion 250. Therefore, as shown in FIG. 25B, the fixing pin 4 cannot be arranged in the inner region of the grounding portion and the shaded region in the figure. For example, even if a fixing pin is provided in the hatched area shown in FIG.
The presence of the outwardly convex region 252 adjacent to 0 (or forming the inwardly convex portion 250) hinders the ruler from being tilted sufficiently as shown in FIG. As a result, the fixing pin 4 cannot reach the paper. Therefore, the fixing pins 4 are allowed to be arranged only in the regions other than the regions shown by solid lines and diagonal lines in FIG. 25B, that is, the regions shown by diagonal lines in FIG. 25C.

The same applies when the ground portion is composed of one or two or more feet. For example, the placement of the feet is shown in FIG.
Consider a case such as (a). The one area surrounding the entire grounding portion (in this case, the foot 6) is the area indicated by the dotted line in FIG. However, the area has an inwardly convex contour portion 260. Therefore, the fixing pin cannot be provided in the region surrounded by the dotted line and the region shown by the diagonal line in FIG. In FIG. 26 (b), the condition that the contour is convex outward is also outside the region shown by the dotted line and the region shown by the diagonal line, that is, shown by the diagonal line in FIG. 26 (c). Area. Therefore, the fixing pin must be provided in the shaded region in FIG. 26 (c).

However, the discussion described here is merely a principle, and when the fixing pin 4 can reach the paper (for example, when the ruler itself can be easily bent), It goes without saying that they may be arranged in the regions shown in FIGS. 25 (b) and 26 (b).
Next, the position of the lowermost end of the fixing pin 4 will be described with reference to FIG. In order to locate the center of the ruler rotation on the line actually drawn, as described above, at least the distance w3 between the position p1 which is the fulcrum when the ruler is tilted and the lower end of the fixing pin 4 is It must be longer than the distance w4 between the fulcrum p1 and the position p2 directly below the ruler side 2. Further, in order to sufficiently achieve the purpose of this embodiment,
Of course, it is preferable that the fixing pin 4 does not extend beyond the ruler side 2.

A sixth embodiment of the present invention will be described with reference to FIGS. 27 and 28. The sixth embodiment is basically based on the same concept as the fifth embodiment, but in this embodiment, the entire ruler is not tilted, but a portion provided with a fixing pin. It is characterized in that it only bends. The present embodiment is an example corresponding to claim 14 of the claims.

As shown in FIG. 27, in this embodiment, an area not grounded (non-grounded portion) is provided below the origin 24 of the ruler side 2 and the fixing pin 4 is arranged there. In addition,
In use, the lower surface 12 touches the paper (grounding portion). In the non-grounded portion, cuts 150 are provided on both sides of the fixed pin 4. As a result, only the portion between the cuts 150 (hereinafter referred to as the "flexible portion 15") can operate independently of the other portions of the ruler side 2. FIG. 28 is an enlarged perspective view of the flexible portion 15.

The flexible portion 15 is formed in a thin plate shape to facilitate deformation. Also, as you go from the inside to the outside of the ruler, lick upward (in the upper right direction in Fig. 28).
Extends to. Then, the fixed pin 4 is the origin 24 of the ruler.
It is located near the tip of the flexure at the position.
How to use is explained.

The basic usage is the same as in the fifth embodiment. However, in this embodiment, when the upper part of the fixing pin 4 is pushed downward, the entire ruler is not tilted, but only the flexible portion 15 is deformed and the fixing pin 4 comes into contact with the paper. This state is shown by the dotted line in FIG. Also in this case, as in the fifth embodiment, the fixing pin 4 is provided with the ruler edge 2
The sheet abuts on the paper at a position p3 that is outside the position p2 directly below. Therefore, also in this embodiment, the center when the ruler is rotated can be placed on the line actually drawn. Further, since the fixing pin 4 does not protrude outside the ruler side 2,
It is possible to draw a line also by using the vicinity of the fixed pin 4 on the ruler side 2.

This embodiment can obtain the same effect as each of the above embodiments. Further, in this embodiment, since it is not necessary to incline the entire ruler, positional deviation is unlikely to occur during use. This embodiment can also be applied to a ruler having a shape as shown in FIG. A seventh embodiment of the present invention will be described with reference to FIGS. 29 to 32. In this embodiment, one sheet-shaped (or thin plate-shaped or film-shaped) member 7 fulfills the role of the fixing pin 4, the pressing portion 5, and the protruding portion 26 in the first embodiment. It is characterized by. The present embodiment is an example corresponding to claims 26 to 29 of the claims.

As shown in FIG. 30, the ruler 1 is notched on the lower side of the origin position 24 (hereinafter, "notched portion 1").
6 "). The sheet member 7 is attached here in a state of protruding outside the ruler side 2 (see FIG. 29). In addition, in FIG. No hatching is added to 7.

The sheet member 7 is made of a transparent and durable material (for example, polypropylene or polyurethane) and is not easily broken even if it is pushed with a pen tip. The thickness of the sheet member 7 can be appropriately selected within a range that does not impair the functions and purposes described below. The ruler 1 has an accommodating portion 160 adjacent to the cutout portion 16 for accommodating the sheet member 7. In this embodiment, the accommodating portion 160 is configured as a groove (or hole) provided on the wall surface of the cutout portion 16. When the sheet member 7 is not used, at least a part of the sheet member 7 can be accommodated therein. In FIG. 30, the seat member 7 in the accommodated state is
It is shown by a dotted chain line.

The method of use will be described. When the ruler is rotated, the sheet member 7 is previously pulled out from the accommodating portion 160 (in FIG. 30, the sheet member 7 in this state is drawn by a solid line). Then, a ruler is placed so that the origin 24 comes to a desired position. After that, the origin 24 portion (strictly speaking, the portion adjacent to the origin 24) of the ruler side 2 of the sheet member 7 is pressed by the pen tip. Then, as shown in FIG. 31, the sheet member 7 is deformed so that the pressed portion projects downward (reference numeral 70 in the drawing, hereinafter referred to as "protruding deformation portion 70"). In the projecting deformed portion 70, the force applied to the paper is stronger than the other areas.
Therefore, if a force is applied to rotate the ruler as it is, the ruler rotates about the protruding deformed portion 70. That is, the protruding deformed portion 70 plays the same role as the fixing pin 4 in the above-mentioned embodiment. The true center of the ruler rotation is not the position of the origin 24 of the ruler but the protruding deformed portion 70. The size of the projecting deformed portion 70 and the center position of the deformed portion 70 (shown by the one-dot chain line in FIG. 31) are determined according to the thickness of the pen tip.
Therefore, regardless of the thickness of the pen used, etc., the center of rotation always exists on the line actually drawn, so that the line can be drawn at an accurate position.

A line cannot be drawn as it is in the region located below the sheet member 7. However, if the sheet member 7 is bent so as to be flipped upward (indicated by an alternate long and short dash line in FIG. 30), a line can be drawn in this area as well. In this case, the sheet member 7 is sandwiched between the ruler side 2 and the pen, and a slight step is formed at the boundary with the portion without the sheet member 7. However, if a sufficiently thin sheet member 7 is used, there is no practical problem. Alternatively, in the portion where the sheet member 7 is provided, the ruler side 2 may be slightly retracted (retracted). This makes it possible to reduce the step difference at the boundary between the portion with the sheet member 7 and the portion without the sheet member 7. If the sheet member 7 is attached to the upper surface of the ruler as shown in FIG. 32, the sheet member 7 does not exist between the ruler side 2 and the pen even when the sheet member 7 is flipped up. Therefore, it is not necessary to take such a structure.

When it is not necessary to rotate the ruler, the sheet member 7 is bent and the leading end side thereof is inserted into the accommodating portion 160. As a result, the sheet member 7 is 2 in FIG.
The accommodation state shown by the dotted chain line can be taken. In this state, the sheet member 7 does not get in the way. Ruler side 2
It is also possible to draw a line using the origin 24 part of.

In this embodiment, the foot 6 need not be provided (it may be provided). Further, the storage section 160 is not always necessary. If the sheet member 7 is sufficiently thin, the sheet member 7 may be simply attached to the lower side surface 12 without providing the notch 16 in the ruler. This embodiment can also obtain substantially the same effects as the other embodiments. Further, the structure is simple and the manufacturing cost can be suppressed. Further, when it is not necessary to rotate the ruler, it can be folded, so that the sheet member 7 can be folded.
Does not get in the way.

Although only the example in which the origin of the straight line ruler is fixed is shown here, it can be applied to a protractor as in the other embodiments. An eighth embodiment of the present invention will be described with reference to FIGS. 33 to 36. The present embodiment is characterized in that a function as a compass is added to a ruler by using a rotation center fixing structure. Furthermore, it is characterized by combining this with a broken line drawing function. This embodiment is an example corresponding to the claims 18 to 21.

The fixation of the center of rotation of this embodiment is basically based on the same principle as that of the sixth embodiment. That is, the fixing pin 4 is arranged in the non-grounded portion provided on the back side of the ruler. The lowermost end of the fixing pin 4 is located higher than the lower side surface 12, and normally does not contact the paper.
Further, in the non-ground portion, a cut (or groove-shaped hole) 15 is formed so as to surround the periphery of the fixing pin 4 except for a part thereof.
0'is provided in a U shape. And the break 15
Part surrounded by 0 '(hereinafter referred to as flexure part 15')
Has been thinned. Therefore, when the flexible portion 15 'is pushed from the upper side to the lower portion, the flexible portion 15' is flexed and the fixing pin 4 reaches the paper.

As shown in FIGS. 33 and 36, the ruler of this embodiment has a pen insertion hole 8 at a predetermined distance from the fixed pin 4.
Are provided in plural. Further, the pen insertion holes 8 are arranged in rows, and the area 80 between each insertion hole 8 is formed thin enough to allow the pen to easily get over (FIG. 35). , FIG. 36). On the other hand, the lateral side of the row is raised to form a wall 81 along the row (see FIG. 35).

In this embodiment, the pen insertion holes 8 have a shape elongated in the row direction for the purpose of drawing a broken line. Further, it is possible to draw a circle whose radius is the distance W5, W6 between the positions of the edges 82, 83 of the pen insertion holes 8 in the column direction and the position where the fixing pin 4 contacts the paper. However, regarding the distances W5 and W6, considering the thickness of the pen,
It is preferable that the distance between the line actually drawn and the position of the fixing pin 4 is set to a predetermined value. In this embodiment, pen insertion holes having a length of about 2 mm are provided at intervals of about 2 mm. Therefore, it is possible to draw circles having different radii by 2 mm. Further, graduations 85 are provided at intervals of 1 cm to make it easy to check the distances w5 and w6. Although only the scale 85 is drawn in the figure, if the number indicating the distance is also drawn, the radius of the circle or arc that can be drawn using the pen insertion hole 85 (or its edges 82, 83) is further increased. It becomes easy to understand.

Although not shown in the figure, the ruler side 2 is provided with a scale. How to use is explained. When used as a compass, the pressing portion 5 is pressed to press the fixing pin 4 against the paper. This state is shown by a two-dot chain line in FIG. Then, in this state, the pen is inserted into the pen insertion hole 8 at a desired position and the pen is moved so as to rotate the ruler. This makes it possible to draw a circle with a desired radius. In this case, when the radius is defined by using the edge 82 of the pen insertion hole 8 on the side closer to the fixed pin 4, the pen is pressed against the edge 82 to draw a circle. On the other hand, when the radius is defined by using the edge 83 of the pen insertion hole 8 that is far from the fixed pin 4, the pen is pressed against the edge 83 to draw a circle. With this configuration, no error occurs even if the pen insertion holes 8 are long in the column direction. Further, since the center of rotation of the ruler is securely fixed by the fixing pin 4, an error does not occur due to a difference in the direction in which the pen is pressed.

On the other hand, when the broken line is drawn, the pen insertion hole 8
The pen is moved to draw a line so as to connect the and the pen insertion hole 8 in the column direction. In this case, each pen insertion hole 8 and the pen insertion hole 8
The area 80 between and is thin enough that the pen can easily get over it. In addition, the wall 81 formed along the row of the pen insertion holes 8 can surely move the pen linearly. Since the lower surface 12 of the ruler is in close contact with the paper, the pen can draw a broken line faithfully to the shape (length) of the pen insertion hole 8.

It is also possible to draw a dotted line, a one-dot chain line, a two-dot chain line, etc. by changing the size and interval of the pen insertion hole 8. In this embodiment, a circle drawing function and a drawing function such as a dotted line can be provided. Moreover, since the same structural part has both functions, the entire ruler can be made small and smart. The origin does not get dirty when drawing a circle.

Basically, this embodiment can also be manufactured collectively by resin molding, so that the manufacturing cost can be suppressed. However, since the pen insertion hole 8 and the periphery of the row formed by the pen insertion hole 8 need to be thinned, they may be separately prepared using a thin plate material, a sheet material or the like and attached to the ruler body. It is also possible to apply the structure for fixing the rotation center shown in other embodiments. However, when the foot 6 is provided, the lower side surface 12 floats from the paper, and it becomes difficult to draw a broken line having a shape (length) faithful to the pen insertion hole 8. Therefore, it is preferable to make the height (protrusion amount w1) as small as possible.

The ninth embodiment of the present invention will be described with reference to FIGS. This embodiment is similar to the eighth embodiment described above.
It has a circle drawing function and a broken line drawing function. In the ninth embodiment, a transparent thin plate member 9 having a pen insertion hole 90 is separately prepared, and this is combined with a ruler body 92 having a slit-shaped slot 91 to form a ruler. It is a feature (see FIG. 37). The pen insertion hole 90 in this embodiment and the pen insertion hole 8 in the above embodiment
Is referred to in claims 6 and 18 "
It corresponds to the "hole into which the pen tip can be inserted".

As the rotation center fixing structure in this embodiment, the same structure as in the fourth embodiment is used. That is, the surface 15 (non-grounded portion) located higher than the lower side surface 12 is provided, and the fixing pin 4 is provided there. The tip of the fixing pin 4 is substantially flush with the lower surface 12 (at the same height position) (see FIGS. 37 and 39). In this case, since the ruler does not have a portion that is deformed during operation, durability and reliability are improved. Further, the accuracy of the radius of the drawn circle or arc can be improved.

The inclination suppressing portion 95 prevents the other end side (right side in FIG. 39) of the ruler from rising even when the outside of the fixing pin 4 (left side in FIG. 39) is pressed with a finger or the like. belongs to. In order to make the fixing pin 4 easily contact the paper, the height Δh1 of the inclination suppressing portion 95 is increased.
Is slightly smaller than the difference Δh2 between the surface 15 and the lower side surface 12. By providing the tilt suppressing portion 95,
It is possible to increase Δh2, that is, the fixing pin 4 to be large (high) while preventing the ruler from being excessively lifted. If the fixing pin 4 is made larger, the surface 15 will not touch the paper when the ruler is rotated, etc., and further improvement in operability is expected. In addition, it is possible to prevent the ruler from being lifted by mistake when drawing a broken line. If Δh2 is sufficiently small, the inclination suppressing portion 9
5 is not necessary.

As shown in FIGS. 37 and 38, the main body 92 of the ruler is provided with slit-shaped slots 91 that penetrate the front and back of the main body 92. Further, on the back side, a concave portion 93 for fitting the thin plate member 9 therein is provided corresponding to the groove hole 91. The depth of the recess 93 is substantially the same as the thickness of the thin plate member 9. Therefore, in the state where the thin plate member 9 is attached to the recess 93, the lower side face of the thin plate member 9 and the lower side face 1 of the ruler body 92.
2 is almost at the same height position. Further, the recess 9
Positioning protrusions 94 for accurately defining the mounting position of the thin plate member 9 are provided at two positions on the plate 3. In this embodiment, the pen insertion hole 90 itself is used as a positioning hole into which the positioning protrusion 94 is fitted. Therefore, the positioning protrusion 94 is arranged on the extension line of the slot 91 and has a shape corresponding to the pen insertion hole 90. The mounting position and orientation of the thin plate member 9 may be defined by matching the shape of the thin plate member 9 with the shape of the recess 93. When accurately drawing a circle, it is necessary that the position of each pen insertion hole 90 and the distance between the fixing pin 4 be accurately defined. For that purpose, not only the position of the thin plate member 9 but also the direction (or angle) can be accurately defined.

On the other hand, the thin plate member 9 is provided with pen insertion holes 90 arranged in rows at predetermined intervals. As described above, the pen insertion hole 90 is also used as a positioning hole.
It is not necessary to separately provide a dedicated positioning hole, and the width of the thin plate member 9 can be made as narrow as possible. Therefore, less raw materials are required for manufacturing. Further, it is possible to add more kinds of broken line drawing functions to one ruler. Furthermore, when the thin plate member 9 is manufactured by appropriately cutting a long material provided with the pen insertion hole 90 with a predetermined length, the degree of freedom in selecting the cutting position is increased and the production efficiency is improved. Increase. Furthermore, the workability is high because the attachment can be performed without distinguishing between the front and back.

On the other hand, when a dedicated positioning hole is provided, it is not necessary to change the positioning projection 94 (that is, the ruler body 92) for each type of thin plate member 9 (type of broken line), and the general purpose of the ruler body 92 is achieved. It is highly likely. This leads to a reduction in manufacturing cost. When the thin plate member 9 is manufactured by appropriately cutting a long material, if a large number of positioning holes 96 are provided at predetermined intervals as shown in FIG. 40, the degree of freedom in selecting cutting positions is increased and the production efficiency is increased. it can. Further, if the positioning holes 96 are symmetrically arranged on both sides of the row of the pen insertion holes 90, the attachment work can be performed without distinguishing the front and back of the thin plate member 9, and the production efficiency is improved. In the manufacturing process, the positioning hole 96 can be used for winding and sending out a long material. For example, the teeth of the sending sprocket gear may be fitted.

In the state where the thin plate member 9 is attached to the ruler body 92, the gap between the position of the edge of the pen insertion hole 90 in the row direction and the position of the fixing pin 4 is a circle or the like in consideration of drawing a circle or the like. It goes without saying that it is determined from the same viewpoint as the distances w5, w6, etc. of the eighth embodiment. In the example of FIG. 37, the same structure as that of the fourth embodiment is used to fix the rotation center. However, instead of this, the method of the seventh embodiment can be applied. The thin plate member 9 provided with the pen insertion hole 90 can also function as the sheet member 7 in the seventh embodiment. In this case, as shown in FIG. 41, it is preferable to provide the thin plate member 9 with a display 99 indicating the position of the rotation center 100, a scale 97 indicating the distance from the rotation center, and a numeral 98. In this way, the structural portion for fixing the center of rotation, the pen insertion hole 90, the scale 97, etc. are present on the same member (thin plate member 9), so that the positioning hole 96, etc. Not particularly necessary. Therefore, the width of the sheet material required for one broken line can be reduced,
More types of pen insertion holes for broken lines can be provided. Alternatively, conversely, the width of the sheet material can be narrowed to reduce the cost. Further, productivity is increased because strict positioning is unnecessary.

In the example of FIG. 41, the center of rotation 100 is set at two places, and two types of scales 97 and numbers 98 are provided accordingly. By doing so, the radius of the circle that can be drawn can be increased. In the example of FIG. 41, if the rotation center 100a is used, the radii of 2, 4,
A circle of 6, 8, ..., 28 mm can be drawn. On the other hand, if the rotation center 100b is used,
A circle having a radius of 3, 5, 7, ..., 29 mm can be drawn. Note that this point is the same when other structural examples are applied as the fixed structure of the rotation center. The colors may be changed for each combination so as not to confuse the combination of the display 99, the scale 97, and the numeral 98. For example, display 99a, scale 97a, number 98a
Is black, while display 99b, scale 97b, number 98
b may be drawn in green.

Further, in the example of FIG. 41, if the thin plate member 9 is made of a material that leaves a mark (protruding deformed portion 70) pressed by the pen, the work from the next time can be facilitated.
The projecting deformable portion 70 and the concave portion formed on the upper side thereof may be formed in advance during manufacturing. Figure 41
The ruler including the thin plate member 9 shown in (1) corresponds to claims 30 and 31 of the claims.

A plurality of rows of pen insertion holes 8 and 90 may be provided to correspond to a plurality of types of broken lines. In this case, if each row is radially arranged, the structure for fixing the rotation center (fixing pin 4 etc.) can be shared by each row (FIG. 4).
2). Further, if the radii that can be drawn using the pen insertion holes 8 and 90 in each row are slightly shifted, more types of circles can be drawn. This is convenient when drawing concentric circles with a very small difference in radius.

According to each of the above-described embodiments, the ruler can be rotated around the origin or the like. Therefore, the displacement does not occur under the influence of the thickness of the pen tip. In addition, the ink does not stain the paper (particularly near the center of rotation). Since a needle or the like provided separately from the ruler is not used, there is no fear of losing them. It is also highly safe. It rarely scratches the paper.
In the first embodiment and the like, the structural portion (fixing pin 4) for fixing the center of rotation also functions as a foot for preventing the ink from being rubbed.

The structure is simple and the manufacturing cost is low. Since the conventional ruler type needs to be slightly changed, there is almost no increase in manufacturing cost in carrying out the present invention.
Furthermore, cost performance is high in the example in which the function of the compass and the function of drawing the dotted line are combined in one structural portion. Also, a circle can be drawn accurately and easily.

The present invention is not limited to the above embodiment. It is needless to say that necessary configurations may be appropriately selected and combined from the configurations shown in the above embodiments.

[0090]

As described above, according to the present invention, the ruler can be rotated accurately about the origin or the like. Therefore, the radial line segments can be drawn easily and quickly. At this time, the ink does not stain the paper (particularly near the center of rotation). In addition, the measurement of the angle becomes easy.

Since the needle and the like provided separately from the ruler are not used, there is no fear of losing them. It is also highly safe and reliable. In a mode in which the structure part 1 has a function as a compass and a function for drawing a dotted line,
High cost performance. Also, a circle can be drawn accurately and easily.

Further, the structure is simple and the manufacturing cost is low. In particular, since it suffices to slightly change a conventional die for manufacturing a ruler or the like, a new investment is hardly necessary for implementing the present invention.

[Brief description of drawings]

FIG. 1A is a plan view showing a first embodiment of the present invention,
It is a front view and (c) side view.

FIG. 2 is an enlarged view of the vicinity of a fixing pin 4.

3 is a sectional end view taken along the line AA of FIG.

FIG. 4 (a) is a partially enlarged plan view showing a foot 6, and
(B) It is a side view.

5A is a view of the ruler being rotated, viewed from the upper side, and FIG. 5B is a view of the state of being placed on a paper viewed from the front side.

FIG. 6 is a diagram showing an example of drawing a line.

FIG. 7 is a view showing another example of the fixing pin 4.

FIG. 8 is a view showing another example of the fixing pin 4.

9 is a diagram showing the fixing pin 4 and the cover member 42 shown in FIG.
It is a figure which shows the effect | action of.

FIG. 10 is a view showing a fixed pin 4 having a hole 41.

FIG. 11 is a partial plan view (a) and a partial side view (b) showing an example in which the positions of the pressing portion 5 and the fixing pin 4 are displaced from each other.

FIG. 12 shows a protractor according to a second embodiment of the present invention,
It is a (a) top view, a (b) front view, and a (c) side view.

FIG. 13 is a side view (a), a plan view (b) and a front view (c) showing a third embodiment of the present invention.

14 is a partially enlarged plan view of FIG.

FIG. 15 is a partially enlarged plan view showing a modification of the third embodiment.

FIG. 16 is a partially enlarged plan view showing a modification of the third embodiment.

17 (a) is a rear view, FIG. 17 (b) is a left side view, FIG. 17 (c) is a plan view, and FIG.
(E) It is a front view.

FIG. 18 is a side view (a), a partial plan view (b) and a partial front view (c) showing a fourth embodiment of the present invention.

FIG. 19 is a side view (a), a partial plan view (b) and a partial front view (c) showing a fifth embodiment of the present invention.

FIG. 20 is a diagram showing the operation of the present embodiment.

FIG. 21 is a partial side view showing a modification of the fifth embodiment.

FIG. 22 is a (a) side view, (b) plan view, and (c) front view showing a modification of the fifth embodiment.

FIG. 23 is a side view showing a modification of the fifth embodiment.

FIG. 24 is a diagram showing the operation of the example shown in FIG. 23.

FIG. 25 is a view for explaining a position where the fixing pin 4 can be provided in the fifth embodiment.

FIG. 26 is a view for explaining a position where the fixing pin 4 can be provided in the fifth embodiment.

FIG. 27 is a plan view (a), a side view (b), and a front view (c) showing a sixth embodiment of the present invention.

FIG. 28 is a schematic diagram showing the operation of the sixth embodiment.

FIG. 29 is a plan view showing a seventh embodiment of the present invention.

30 is a cross-sectional view taken along the line BB of FIG.

FIG. 31 is a diagram showing an operation of the seventh embodiment.

FIG. 32 is a diagram showing a modification of the seventh embodiment.

FIG. 33 is a plan view (a), a front view (b), and a side view (c) showing an eighth embodiment of the present invention.

34 is a cross-sectional view taken along the line CC of FIG.

35 is a cross-sectional view taken along the line DD of FIG. 33.

36 is a sectional view taken along line EE in FIG. 33.

FIG. 37 is an exploded perspective view showing a ninth embodiment of the present invention.

FIG. 38 shows a ruler body 92 in the ninth embodiment,
(A) Bottom view, (b) Plan view, (c) Front view, (d) Side view.

FIG. 39 is an enlarged front view of the essential parts of the ninth embodiment.

FIG. 40 is a view showing an example of a thin plate member 9 provided with a positioning hole 96.

FIG. 41 (a) is a plan view showing another example of the thin plate member 9;
(B) It is a front view.

FIG. 42 is a diagram showing an example in which a plurality of rows of pen insertion holes 8 and 90 are provided.

[Explanation of symbols]

1: ruler, 2: ruler side, 3: edge, 4: fixed pin,
5: pressing portion, 6: foot, 7: sheet member, 8: pen insertion hole, 9: thin plate member, 10: upper surface of ruler, 12: lower surface of ruler, 13: non-ground surface, 14: tapered surface, 15: Deflection part, 16: Notch part, 20: Scale, 21: Reference line, 22: Scale number, 24: Origin, 26: Overhang part, 30: Angle scale, 31: Reference line, 32: Scale number, 34 : Angle center, 42: cover member, 70: projecting deformation portion, 80: area between pen insertion holes, 81: wall along row of pen insertion holes, 82: edge of pen insertion hole, 83: pen insertion hole Edge, 85: Scale, 90: Pen insertion hole, 91: Groove hole, 92: Ruler body, 93: Recess for mounting thin plate member 9, 94: Positioning protrusion, 95: Tilt suppressing part, 96: Positioning hole, 97: Scale, 98: Scale number, 99: Center display, 100: Center of rotation Location, 150: cut, 16
0: accommodation part, 400: truncated cone, 401: bottom part, 40
2: Protrusion

Claims (31)

[Claims] 1. A main body having a ruler side used for drawing a line, and a fixing pin provided at a position along the ruler side on a surface of the main body facing the paper when used. Ruler characterized by. 2. A main body, a scale indicating a length provided on the main body, and a fixing pin provided at a position corresponding to an origin of the scale on a surface of the main body facing the paper at the time of use. A ruler characterized by having. 3. A main body, a scale indicating an angle drawn on the main body, and a fixing pin provided at a position corresponding to an angular center of the scale on a surface of the main body facing the paper when in use. A ruler characterized by that. 4. The ruler according to claim 1, further comprising a foot provided on the surface. 5. The ruler according to claim 4, wherein the lower end of the fixing pin and the lower end of the foot are substantially on the same plane. 6. A main body, a hole provided in the main body, into which a pen tip can be inserted, and a fixing pin provided at a predetermined distance from the hole on the surface of the main body facing the paper when in use, A ruler characterized by having. 7. A grounding part having a main body and a fixing pin, wherein the main body has a surface on the side facing the paper when it is placed on the paper for use, and a grounding part that comes into contact with the paper when placed on the paper. A ruler, comprising: a non-grounded portion that does not come into contact with the paper when placed on the paper, and the fixing pin is disposed in the non-grounded portion. 8. The ruler according to claim 7, wherein a lower end portion of the fixing pin is substantially flush with the paper when the main body is placed on the paper. 9. The ruler according to claim 7, wherein the height position of the lower end portion of the fixing pin is substantially on the same plane as the ground contact portion. 10. The main body comprises a ruler side used for drawing a line, and the non-grounded portion is provided so as to include a region along the ruler side. Ruler described in 7. 11. The ruler according to claim 10, wherein the fixing pin is provided below the ruler side. 12. The ruler according to claim 11, wherein the height position of the lower end portion of the fixing pin is higher than the ground contact portion. 13. The non-grounded portion is configured to include a region that is convex outside a straight line connecting a boundary position between the grounded portion and the non-grounded portion and the ruler side. The ruler according to claim 12, which is characterized in that. 14. The ruler according to claim 7, wherein an area including the fixing pin in the non-grounded portion can be bent downward independently of an area around the fixing pin. 15. The ruler according to claim 7, wherein the fixing pin is provided at a position along the ruler side on the lower surface of the main body. 16. The ruler according to claim 7, further comprising a scale indicating a length drawn on the main body, wherein the fixing pin is provided at a position corresponding to an origin of the scale. . 17. A scale having an angle drawn on the body is provided, and the fixing pin is provided on a lower surface of the body at a position corresponding to an angle center of the scale. The ruler according to claim 7. 18. The ruler according to claim 7, further comprising a hole which is provided at a predetermined distance from the fixing pin and into which a pen tip can be inserted. 19. The ruler according to claim 18, wherein a plurality of the holes are provided, and the holes are arranged in rows according to a specific repeating pattern. 20. The ruler according to claim 19, wherein the repeating pattern includes any one of a dotted line, a broken line, a one-dot chain line, and a two-dot chain line. 21. The scale according to claim 18, further comprising a scale indicating a radius of an arc which can be drawn by inserting a pen into the hole and rotating the fixed pin as a center. ruler. 22. The fixing pin is transparent, and the fixing pin is transparent.
9, 10, 11, 12, 13, 14, 15, 16, 1
Ruler according to 7, 18, 19, 20 or 21. 23. The fixing pin is made of resin, and the fixing pin is formed of resin.
9, 10, 11, 12, 13, 14, 15, 16, 1
Ruler according to 7, 18, 19, 20, 21 or 22. 24. The fixing pin is formed integrally with the main body, and the fixing pin is integrally formed with the main body.
9, 10, 11, 12, 13, 14, 15, 16, 1
Ruler described in 7, 18, 19, 20, 21, 22 or 23. 25. A concave portion provided at a position corresponding to the fixing pin on the upper surface of the main body, wherein the concave portion is provided in the main body.
9, 10, 11, 12, 13, 14, 15, 16, 1
Ruler described in 7, 18, 19, 20, 21, 22, 23 or 24. 26. A ruler, comprising: a main body having a ruler side used for drawing a line; and a sheet member provided on the main body so as to protrude from the ruler side. 27. A ruler according to claim 26, further comprising a scale indicating a length provided on the main body, wherein the sheet member is provided at a position corresponding to an origin of the scale. . 28. A ruler comprising a main body, a scale indicating an angle provided on the main body, and a sheet member provided at a position corresponding to an angle center of the scale. 29. The ruler according to claim 26, further comprising an accommodating portion capable of accommodating at least a part of the sheet member. 30. A thin plate member having one or more holes into which a pen tip can be inserted, a reference position display showing a position of a rotation center on the thin plate member, the rotation center position, and the hole. A ruler characterized by including a radius display scale indicating the distance to and. 31. The ruler according to claim 30, wherein the reference position display and the radius display scale are provided on the thin plate member.