JP2012162020A - Compass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compass that can be easily picked up with an operation part, even while both legs are inclined, and can more easily draw a circle, etc.SOLUTION: The operation part 5 is set in a standing condition in an attachment body 4 where both legs 2 and 3 are turnably attached. The operation part 5 is elastically deformable to a surface a that is orthogonal to a turning axis.

Description

  The present invention relates to a compass.

  A general compass includes, for example, a central leg provided with a needle, a rotating leg provided with a pencil, and an attachment body on which both legs are rotatably attached as disclosed in Patent Document 1. In addition, an operation unit that is picked up with a finger when drawing a circle or the like is vertically provided on the attachment body.

JP-A-10-193877

  By the way, in order to smoothly draw a circle or the like using the above-mentioned compass, instead of turning both legs upright with respect to the paper surface 18, both legs are rotated in the direction in which the rotating legs are rotated as shown in FIG. It is preferable to rotate in a state inclined in the direction indicated by arrow c in the figure. The reason is considered to be that the pencil lead can be smoothly slid with respect to the paper surface 18 by inclining the pencil lead provided on the rotary leg to the paper surface 18 and making contact with the paper surface 18. In addition, the code | symbol 2, 4, 5, 17 in FIG. 6 has each shown the center leg, the attachment body, the operation part, and the needle | hook.

  However, when drawing a circle or the like by tilting both legs as described above, the operation unit 5 is also tilted together with the both legs, so that it is difficult to pick the operation unit 5 that is picked from substantially above, and as a result, the work of drawing a circle or the like by tilting both legs. It becomes difficult to do.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a compass that can easily pick an operation part even when both legs are tilted and can easily draw a circle or the like. To do.

  In order to solve the above-mentioned problem, the compass of the present invention has an operating portion 5 erected on an attachment body 4 to which both legs 2 and 3 are rotatably attached, and the operating portion 5 is rotated by the legs 2 and 3. It is characterized in that it can be elastically deformed so as to be inclined with respect to a plane a perpendicular to the axis. With this configuration, when drawing a circle or the like with both legs 2 and 3 tilted, the operation unit 5 can be elastically deformed to be substantially parallel to the vertical direction. For this reason, the operation unit 5 can be easily picked when the legs 2 and 3 are tilted to draw a circle or the like.

  In another compass of the present invention, an operation portion 5 is erected on a mounting body 4 to which both legs 2 and 3 are rotatably attached, and the operation portion 5 is orthogonal to the rotation axis of the legs 2 and 3. It attaches to the said attachment body 4 so that rotation with respect to the surface a to rotate is possible. With this configuration, when drawing a circle or the like with both legs 2 and 3 tilted, the operation unit 5 can be rotated to be substantially parallel to the vertical direction. For this reason, the operation unit 5 can be easily picked when the legs 2 and 3 are tilted to draw a circle or the like.

  Further, according to another compass of the present invention, an operation portion 5 is erected on an attachment body 4 to which both legs 2 and 3 are rotatably attached, and the operation portion 5 is used as a rotation shaft of the legs 2 and 3. It is characterized in that it is tilted with respect to an orthogonal virtual plane a. With this configuration, when drawing a circle or the like with both legs 2 and 3 tilted, the operation unit 5 can be made substantially parallel to the vertical direction. For this reason, the operation unit 5 can be easily picked when the legs 2 and 3 are tilted to draw a circle or the like.

  In the compass according to the present invention, when the both legs are tilted to draw a circle or the like, the operation unit can be easily picked, and a circle or the like can be easily drawn.

It is a front view which shows the compass of 1st embodiment of this invention. It is a longitudinal cross-sectional view which shows a mode at the time of drawing a circle with a compass same as the above. It is a longitudinal cross-sectional view of the compass of 2nd embodiment. It is a longitudinal cross-sectional view of the compass of 3rd embodiment. It is a longitudinal cross-sectional view of the compass of 4th embodiment. It is a longitudinal cross-sectional view of the compass of 5th embodiment. It is a side view which shows the mode at the time of drawing a circle with the conventional compass.

  Hereinafter, the present invention will be described with reference to the accompanying drawings. A compass 1 of the first embodiment is shown in FIGS.

  As shown in FIG. 1, the compass 1 is a rotating leg provided with a center leg 2 for determining the center of a circle or arc (hereinafter referred to as a circle) drawn on the paper surface 18 and a writing instrument (pencil 7 in the illustrated example). 3 and an attachment body 4 in which the ends of both legs 2 and 3 are pivotally attached so that both legs 2 and 3 can be opened and closed. The attachment body 4 has an operation portion 5 standing as a knob. Has been.

  In the following description, the components of the compass 1 will be described with reference to the state in which both legs 2 and 3 are closed, unless otherwise specified. In the following description, directions indicated by arrows A, B, C, and D in FIG. 1 will be described as upward, downward, leftward, and rightward, respectively.

  Both legs 2 and 3 are formed in the shape of a substantially straight bar which is long in the vertical direction, and a needle 17 protruding downward is provided at the lower end of the center leg 2. A writing instrument mounting portion 6 is provided at the lower end of the rotary leg 3, and a pencil 7 is detachably mounted on the writing instrument mounting portion 6 through the writing tool mounting portion 6. Further, attached portions 8 and 9 are formed at the upper ends of the legs 2 and 3, respectively.

  The attachment body 4 is an integrally molded product made of hard resin, and the attachment body 4 is formed with a substantially U-shaped leg attachment portion 10 opened downward in a side view as shown in FIG. Between the front and rear wall portions 11 and 12 of the leg mounting portion 10, the mounted portions 8 and 9 of both legs 2 and 3 are inserted. The front wall portion 11 of the leg mounting portion 10, the mounted portion 8 of the center leg 2, the mounted portion 9 of the rotating leg 3, and the rear wall portion 12 of the leg mounting portion 10 are screwed from the front in this order. 13 is passed. A nut 14 is screwed onto a tip portion protruding rearward from the rear wall portion 12 of the screw 13, whereby both legs 2 and 3 are rotatably attached to the attachment body 4, and the axial direction is the front-rear direction. And can be rotated around a screw 13 in parallel.

  The operation portion 5 is erected on the upper end portion located above the attached portions 8 and 9 of the leg attachment portion 10. The operation part 5 is formed integrally with the leg attachment part 10 and is made of hard resin. The operation part 5 is formed in a substantially cylindrical shape whose diameter gradually decreases from the protruding base end to the upper side in the axial direction, and a knurled slip stopper is formed on the outer peripheral surface thereof as shown in FIG. Yes.

  As shown in FIG. 2, the operation portion 5 protrudes obliquely upward and forward from the upper end portion of the leg mounting portion 10, with respect to a surface a perpendicular to the pivot shaft (the shaft portion of the screw 13) of both legs 2 and 3. Leaning. The angle α formed by the central axis b and the surface a of the operation unit 5 is set to 10 to 45 degrees.

  When a circle or the like is drawn using the compass 1, the legs 2 and 3 are rotated to adjust the opening / closing angle β of both the legs 2 and 3, and then the tip of the needle 17 and the pencil 7 are drawn. Is placed on the paper surface 18. Next, the operation unit 5 is picked with a finger, and the operation unit 5 is operated with this finger to rotate the rotating leg 3 around the needle 17 in plan view. At this time, as shown in FIG. 2, when the legs 2 and 3 are tilted in the rotation direction of the rotary leg 3 shown in FIG. 2, a circle or the like can be drawn smoothly.

  Here, since the operation part 5 of this embodiment is inclined with respect to the surface a, when drawing a circle etc. in the state which inclined both the legs 2 and 3 as mentioned above, the operation part 5 is the leg attachment part 10. And substantially parallel to the direction orthogonal to the paper surface 18. For this reason, when drawing a circle etc. in a state where both legs 2 and 3 are tilted, the operation unit 5 can be easily picked, and a circle etc. can be drawn easily. In addition, although the operation part 5 of this embodiment is not inclined in the left-right direction, it may be inclined.

  Next, a second embodiment will be described. In the following explanation, the same number is given about the same composition as a first embodiment, and the duplicate explanation is omitted.

  In the compass 1 of the second embodiment shown in FIG. 3, the operation portion 5 is separate from the attachment body 4 and is formed of a soft resin or synthetic rubber that is softer than the attachment body 4.

  The attachment body 4 is divided into two parts in the front and rear, and is composed of a front part 20 constituting the front half and a rear part 21 constituting the rear half. The front part 20 and the rear part 21 are fastened by the screw 13 and the nut 14. The leg mounting portion 10 composed of the front part 20 and the rear part 21 has a fitting recess 22 opened upward at the upper end thereof.

  The operation portion 5 includes a fitted portion 23 formed at the lower end portion, a constricted portion 25 whose lower end is connected to the fitted portion 23, and a knob portion 24 whose lower end is connected to the upper end of the constricted portion 25. I have.

  The fitted part 23 is fitted in the fitting concave part 22 of the attachment body 4 and is sandwiched and fixed between the front part 20 and the rear part 21. Thereby, the operation part 5 is attached to the attachment body 4. Although the knob | pick part 24 is the same shape as the operation part 5 of 1st embodiment, the axial direction is not inclined with respect to the surface a, and is parallel to the surface a.

  The constricted portion 25 that connects the knob portion 24 and the fitted portion 23 is thinner than the knob portion 24 and the fitted portion 23, and is a portion that is particularly easily bent in the soft operation portion 5. For this reason, the axial direction of the knob | pick part 24 can be inclined with respect to the surface a by elastically deforming and bending the constriction part 25 as shown with the dashed-two dotted line of FIG. The upper limit of the inclination angle α with respect to the surface a of the operation unit 5 is determined by adjusting the position where the operation unit 5 hits the upper edge of the fitting recess 22 as shown in FIG. Is set to 10 to 45 °.

  When compass 1 of this embodiment draws a circle etc. in the state where both legs 2 and 3 are inclined, constriction part 25 of operation part 5 is elastically deformed, and knob part 24 of rotary leg 3 is made to surface a. By tilting in the direction opposite to the rotation direction, the knob 24 can be made substantially parallel to the direction orthogonal to the paper surface 18. For this reason, when drawing a circle etc. in a state where both legs 2 and 3 are tilted, the operation unit 5 can be easily picked, and a circle etc. can be drawn easily. In addition, even when the rotation direction of the rotary leg 3 is reversed, the knob 24 is correspondingly elastically deformed so as to be inclined in the direction opposite to the rotation direction of the rotary leg 3 with respect to the surface a. It is easy to use.

  Next, a third embodiment will be described. In addition, about the same structure as 1st embodiment, the same number is provided and the overlapping description is abbreviate | omitted.

  In the compass 1 of the third embodiment shown in FIG. 4, the operation unit 5 is separate from the attachment body 4 and is formed of a soft resin or synthetic rubber that is softer than the attachment body 4. The operation unit 5 may be molded together with the mounting body 4 by two-color molding, or may be molded separately from the mounting body 4. The attachment body 4 has a fixing portion 27 that integrally protrudes upward from the upper end portion of the leg attachment portion 10, and an enormous portion 28 that is thicker than the lower portion is formed at the upper end portion of the fixing portion 27. .

  A recess 29 having a T-shaped cross section that opens downward and matches the fixed portion 27 is formed at the lower end portion of the operation portion 5. The operation portion 5 is attached in a state in which the fixing portion 27 is fitted into the recess 29 so that the leg attachment portion 10 of the attachment body 4 is prevented from coming off. This operation part 5 protrudes directly from the attachment body 4, and the axial direction is parallel to the surface a.

  In this way, the soft operation part 5 attached to the attachment body 4 is difficult to deform only at the lower end part fixed to the fixing part 27, but its axial direction is a surface as shown by a two-dot chain line in FIG. It can be elastically deformed so as to be inclined with respect to a.

  When compass 1 of this embodiment draws a circle etc. in the state which inclined both legs 2 and 3, operation part 5 is elastically deformed and the operation part 5 is opposite to the rotation direction of rotation leg 3 with respect to surface a. By tilting in the direction, the operation unit 5 can be made substantially parallel to the direction orthogonal to the paper surface 18. For this reason, when drawing a circle etc. in a state where both legs 2 and 3 are tilted, the operation unit 5 can be easily picked, and a circle etc. can be drawn easily. Further, even when the rotation direction of the rotary leg 3 is reversed, the operation unit 5 can be elastically deformed so as to be inclined in the direction opposite to the rotation direction of the rotary leg 3 with respect to the surface a. It is easy to use.

  Next, a fourth embodiment will be described. In addition, about the same structure as 1st embodiment, the same number is provided and the overlapping description is abbreviate | omitted.

  The compass 1 according to the fourth embodiment shown in FIG. 5 has a knob 24 having the same shape as the operation unit 5 of the first embodiment, and a columnar shape that integrally connects the knob 24 and the upper end of the leg mounting part 10. Or it is comprised by the flake-like bending part 31 which makes a thickness direction parallel to the front-back direction, and the operation part 5 is a product made from hard resin. The bent portion 31 has a smaller front-rear dimension than the knob portion 24 and the leg mounting portion 10, and is easily bent in the front-rear direction. Therefore, as shown by a two-dot chain line in FIG. 5, the bending portion 31 is elastically deformed and bent, whereby the axial direction of the knob portion 24 can be inclined with respect to the surface a.

  When compass 1 of this embodiment draws a circle etc. in the state where both legs 2 and 3 were inclined, operation part 5 is elastically deformed and knob part 24 is made into the direction of rotation of rotary leg 3 with respect to surface a. By tilting in the opposite direction, the knob 24 can be made substantially parallel to the direction orthogonal to the paper surface 18. For this reason, when drawing a circle etc. in a state where both legs 2 and 3 are tilted, the operation unit 5 can be easily picked, and a circle etc. can be drawn easily. In addition, even when the rotation direction of the rotary leg 3 is reversed, the knob 24 is correspondingly elastically deformed so as to be inclined in the direction opposite to the rotation direction of the rotary leg 3 with respect to the surface a. It is easy to use.

  Next, a fifth embodiment will be described. In addition, about the same structure as 1st embodiment, the same number is provided and the overlapping description is abbreviate | omitted.

  In the compass 1 of the present embodiment shown in FIG. 6, the operation unit 5 is made of a hard resin separate from the attachment body 4 and is attached to the attachment body 4 so as to be rotatable.

  The mounting body 4 is divided into two parts in the front and rear, and is composed of a front part 20 constituting the front half and a rear part 21 constituting the rear half. The front part 20 and the rear part 21 are fastened by the screw 13 and the nut 14. Has been. A hole 33 opening upward is formed in the upper end portion of the leg mounting portion 10 composed of the front part 20 and the rear part 21. A fitting portion 36 having a spherical inner surface is formed in the lower portion of the hole 33. Further, at the upper end portion of the leg mounting portion 10, a long hole 37 that is long in the vertical direction and is located at the front and the rear of the fitting portion 36 and communicates with the fitting portion 36 is formed.

  The operation unit 5 includes a spherical connecting part 35 formed at the lower end, a connecting part 39 having a lower end connected to the connecting part 35, and a knob 24 having a lower end connected to the upper end of the connecting part 35. The knob portion 24 has the same shape as the operation portion 5 of the first embodiment.

  The connecting portion 35 is rotatably fitted in the fitting portion 36 of the attachment body 4, whereby the operation portion 5 is rotatably connected to the attachment body 4. In addition, the operation unit 5 includes a rotation restricting protrusion 38 protruding from the connecting part 35 to the front side and the rear side. Each protrusion 38 is accommodated in the corresponding long hole 37 of the mounting body 4 so as to be slidable in the vertical direction, and thereby the connecting portion 35 is restricted from rotating in the horizontal direction. That is, the operation unit 5 is restricted from rotating in the left-right direction with respect to the attachment body 4 and is rotatable in the front-rear direction and the up-down direction.

  The rotation range of the operation unit 5 in the front-rear direction and the up-down direction is determined by adjusting the position where the operation unit 5 hits the upper edge of the hole 33 as shown in FIG. The upper limit of the inclination angle α with respect to a is set to 10 to 45 °.

  When compass 1 of this embodiment draws a circle etc. in the state where both legs 2 and 3 are inclined, operation part 5 rotates with respect to attachment body 4, and knob part 24 rotates with respect to surface a. By tilting in the direction opposite to the rotation direction of the legs 3, the knob 24 can be made substantially parallel to the direction orthogonal to the paper surface 18. For this reason, when drawing a circle etc. in a state where both legs 2 and 3 are tilted, the operation unit 5 can be easily picked, and a circle etc. can be drawn easily. Further, when the rotation direction of the rotary leg 3 is reversed, the knob 24 is correspondingly rotated with respect to the surface a so as to be inclined in the direction opposite to the rotation direction of the rotary leg 3. It is easy to use.

  In addition, in place of the pencil 7, another writing tool such as a mechanical pencil, a lead core, or the like may be provided on the rotary leg 3 in each of the embodiments described above. In addition, the design can be changed as appropriate without departing from the gist of the present invention.

a surface 1 compass 2 center leg 3 rotating leg 4 mounting body 5

Claims (3)

  A compass characterized in that an operating portion is erected on an attachment body in which both legs are rotatably attached, and the operating portion can be elastically deformed so as to be inclined with respect to a surface perpendicular to the rotational axis of the leg. .   An operating portion is erected on a mounting body in which both legs are rotatably mounted, and the operating section is rotatably mounted on the mounting body so as to be inclined with respect to a surface orthogonal to the rotation axis of the leg. Compass characterized by.   A compass characterized in that an operation portion is erected on an attachment body to which both legs are rotatably attached, and the operation portion is inclined with respect to a plane orthogonal to the rotation axis of the leg.

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