CN216804965U - Compasses - Google Patents

Compasses Download PDF

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Publication number
CN216804965U
CN216804965U CN202220246092.1U CN202220246092U CN216804965U CN 216804965 U CN216804965 U CN 216804965U CN 202220246092 U CN202220246092 U CN 202220246092U CN 216804965 U CN216804965 U CN 216804965U
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China
Prior art keywords
connecting rod
compass
compasses
head
rotatably connected
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CN202220246092.1U
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Chinese (zh)
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施吉芬
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Yuyao Sikumai Stationery Co ltd
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Yuyao Sikumai Stationery Co ltd
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Priority to CN202220246092.1U priority Critical patent/CN216804965U/en
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Abstract

The utility model relates to a compasses, which comprises a compasses head; the lower end of the first supporting leg is provided with a compass tip; the lower end of the second supporting leg is provided with a compass pen; the method is characterized in that: the compasses head is rotatably connected with the compasses head, the other end of the compasses head is rotatably connected with the first support leg, and the compasses tip can keep a basically vertical state through the rotation of the A connecting rod assembly relative to the compasses head; one end of the B connecting rod assembly is rotatably connected with the compass head, the other end of the B connecting rod assembly is rotatably connected with the second supporting leg, and the compasses pen can keep a basically vertical state through the rotation of the B connecting rod assembly relative to the compass head; the locking structure is arranged on the compass head and can lock the relative angle between the first support leg and the second support leg, so that the compass point of the compass is more accurate, the drawn circular arc precision is higher, and the compass point and the compass pen are not easy to move relatively in the drawing process.

Description

Compasses
Technical Field
The utility model relates to a drawing tool, in particular to compasses.
Background
Compasses (Compasses) are tools used to draw circles or arcs in mathematics and drawings, and are commonly used in ruler drawing. In general, compasses comprise two legs, one of which has a needle tip at its end for centering and the other of which has a pencil lead for drawing circles or arcs.
Chinese utility model patent as patent number ZL201821370508.0 (grant No. CN208801781U) discloses a compasses, including compasses handle, compasses neck, location foot, drawing foot, the lower part of compasses handle with the upper portion of compasses neck is connected, the upper portion of location foot with the upper portion pivotal connection and the rotation axis of drawing the foot extend along the horizontal direction, the lower extreme of location foot is the compasses point, the lower extreme of drawing the foot is the painting brush, the lower part of compasses neck sets firmly on the drawing foot, the upper end of compasses neck is the bulb, compasses handle lower part have with bulb matched with spherical inner chamber, the bulb can universal rotation ground inlay and establish in the spherical inner chamber.
The compasses have the following defects: because compasses pen and compasses point all incline mutually with the paper when drawing, not only lead to the circular arc line of drawing thick, there is the difference with the circular arc diameter of actual demand, draw the circular arc precision lower, still make the compasses point inaccurate at the in-process centering of drawing, take place the aversion easily, cause and draw the circular arc failure. In addition, the included angle between the positioning foot and the drawing foot is kept only by means of friction force between the positioning foot and the drawing foot, so that the positioning foot and the drawing foot are easy to rotate relatively in the drawing process, the distance between the compass point and the compass pen is changed, namely the diameter of a drawn arc is changed, and failure in drawing the arc is also caused.
SUMMERY OF THE UTILITY MODEL
The first technical problem to be solved by the present invention is to provide a compass with a more accurate compass point positioning and a higher accuracy of drawn circular arc, in view of the above technical situation.
The second technical problem to be solved by the present invention is to provide a compass in which the compass tip and the compass pen are not easy to move relatively during the drawing process, in view of the above technical situation.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a compasses, comprising
A compass head;
the lower end of the first supporting leg is provided with a compass tip;
the lower end of the second supporting leg is provided with a compass pen;
the method is characterized in that: also comprises
One end of the A connecting rod assembly is rotatably connected with the compass head, the other end of the A connecting rod assembly is rotatably connected with the first support leg, and the compass tip can be kept in a basically vertical state through the rotation of the A connecting rod assembly relative to the compass head;
one end of the B connecting rod assembly is rotatably connected with the compass head, the other end of the B connecting rod assembly is rotatably connected with the second supporting leg, and the compasses pen can keep a basically vertical state through the rotation of the B connecting rod assembly relative to the compass head;
and the locking structure is arranged on the compass head and can lock the relative angle between the first support leg and the second support leg.
The compass point can adopt any compass point in the prior art, is not limited to a sharp needle point, and can also be a pressing block, a sucking disc and the like which have a surface contacted with a drawing base and can be positioned; the compass pen can also adopt any compass pen in the prior art, not only is limited to a pencil lead and a refill, but also can be a painting brush in various forms, such as a chalk, a pencil, a gel-ink pen or a dip pen.
In order to enable the structures of the A connecting rod assembly and the right connecting rod mechanism to be simpler, the A connecting rod assembly comprises a first connecting rod and a second connecting rod positioned below the first connecting rod, one end of the first connecting rod and one end of the second connecting rod are both rotatably connected with the compass head, and the other end of the first connecting rod and the other end of the second connecting rod are both rotatably connected with the first supporting leg; the B connecting rod assembly comprises a third connecting rod and a fourth connecting rod located below the third connecting rod assembly, one end of the third connecting rod and one end of the fourth connecting rod are both rotatably connected with the compass head, and the other end of the third connecting rod and the other end of the fourth connecting rod are both rotatably connected with the second supporting leg.
In order to facilitate the locking of the four links simultaneously and to improve the locking effect, and at the same time, in order to make the locking structure simpler, the head of the compass comprises a front part and a rear part, the a-link assembly and the B-link assembly are both located between the front part and the rear part, and the locking structure is a locking cover which is at least partially located on the front side of the front part and detachably connected with the rear part.
In order to make the detachable connection of the locking cover and the rear part simpler, and at the same time, in order to facilitate the adjustment of the degree of locking, the locking cover is screwed to the rear part.
In order to simplify the structure of the compasses, a first rotating shaft part is arranged on the front side of the rear part, one end of the first connecting rod and one end of the third connecting rod are both rotatably arranged on the first rotating shaft part, so that the rotating axis of the first connecting rod relative to the compasses head is overlapped with the rotating axis of the third connecting rod relative to the compasses head; the first rotating shaft part is provided with a screw hole, and the rear side of the locking cover is provided with a screw rod part connected with the screw hole.
In order to facilitate the assembly of the compasses, the upper part of the front part extends backwards to form a clamping hook, and the rear part is provided with a clamping hole in clamping fit with the clamping hook.
In order to be able to only need the unilateral application of force when adjusting the distance between compasses point and the compasses pen to be convenient for change the circular arc diameter that the compasses were drawn, simultaneously, in order to make A link assembly and B link assembly be difficult to produce relative rotation, A link assembly and B link assembly linkage set up.
In order to make the linkage structure between the A connecting rod assembly and the B connecting rod assembly simpler, a second rotating shaft part and a third rotating shaft part are arranged on the compass head at intervals, one end of the second connecting rod is rotatably arranged on the second rotating shaft part, and one end of the fourth connecting rod is rotatably arranged on the third rotating shaft part; one end of the second connecting rod is provided with a first tooth part, and one end of the fourth connecting rod is provided with a second tooth part meshed with the first tooth part.
Compared with the prior art, the utility model has the advantages that: the compasses pen keeps a basically vertical state through the A connecting rod assembly, so that the compasses pen is more accurate in centering in the drawing process and is not easy to shift.
Drawings
FIG. 1 is a perspective view of the embodiment of the present invention (in a state where compasses are folded);
FIG. 2 is a schematic view of the structure of the hook and the hole;
FIG. 3 is a front view of the embodiment of the present invention (in the extended state of the compass);
FIG. 4 is a perspective view of the embodiment of the present invention (with the compass extended) with the locking cover and the front member removed;
fig. 5 is an exploded perspective view of an embodiment of the present invention.
Detailed Description
The utility model is described in further detail below with reference to the following examples of the drawings.
As shown in FIGS. 1 to 5, the preferred embodiment of the present invention is shown.
The compass in the present embodiment, as shown in fig. 1, includes a compass head 1, a first leg 2, a second leg 3, an a link assembly 6, a B link assembly 7, and other main components.
The head 1 comprises a front part 11 and a rear part 12, the front part 11 and the rear part 12 being connected to each other. Specifically, the left and right sides of the upper portion of the front part 11 are extended backward with hooks 111, and the left and right sides of the rear part 12 are opened with locking holes 124 (see fig. 2) which are in locking fit with the hooks 111 on the corresponding sides, thereby facilitating the assembly of the compass head 1. The head 1 has a front member 11 and a rear member 12 spaced apart from each other at a lower-middle portion, and an A-link assembly 6 and a B-link assembly 7 are interposed between the front member 11 and the rear member 12 (see FIG. 4).
As shown in fig. 3, in particular, one end of the a-link assembly 6 is rotatably connected with the compass head 1, the other end is rotatably connected with the first leg 2, and the lower end of the second leg 2 is provided with the compass tip 4, so that the rotation of the a-link assembly 6 relative to the compass head 1 can keep the compass tip 4 in a substantially upright state, thereby enabling the compass tip 4 to be centered more accurately during the drawing process and not to be easily displaced; one end of the B connecting rod assembly 7 is rotatably connected with the compass head 1, the other end of the B connecting rod assembly 7 is rotatably connected with the second supporting leg 3, and the lower end of the second supporting leg 3 is provided with the compass pen 5, so that the B connecting rod assembly 7 can enable the compass pen 5 to keep a basically vertical state relative to the rotation of the compass head 1, thereby avoiding the over-thickness of an arc line drawn by the compass pen 5, further enabling the diameter of the drawn arc to be closer to a target arc, and further enabling the precision of the drawn arc to be higher. The compass pen 5 in this embodiment is a lead core, and in other embodiments, the compass pen 5 may also be a painting brush in various forms, such as a chalk, a pencil, a gel-ink pen, or a dip pen. The compasses head 1 is provided with a locking structure which can lock the relative angle between the first supporting leg 2 and the second supporting leg 3, can lock the distance between the compasses point 4 and the compasses pen 5, and further can avoid the change of the drawn circular arc diameter in the drawing process, thereby successfully drawing the circular arc.
As shown in fig. 3, the a-link assembly 6 includes a first link 61 and a second link 62 located below the first link 61, one end of the first link 61 and one end of the second link 62 are both rotatably connected to the compass head 1, the other end of the first link 61 and the other end of the second link 62 are both rotatably connected to the first leg 2, and the cooperative engagement of the first link 61 and the second link 62 enables the first leg 2 to always keep a substantially upright trend when the compass is opened, so that the compass tip 4 can always keep a substantially upright trend when the compass is opened. The B connecting rod assembly 7 comprises a third connecting rod 71 and a fourth connecting rod 72 positioned below the third connecting rod 71 assembly, one end of the third connecting rod 71 and one end of the fourth connecting rod 72 are both rotatably connected with the compasses head 1, the other end of the third connecting rod 71 and the other end of the fourth connecting rod 72 are both rotatably connected with the second support leg 3, and the cooperative fit of the third connecting rod 71 and the fourth connecting rod 72 can enable the second support leg 3 to always keep a basically vertical trend when the compasses are opened, so that the compasses 5 can always keep basically vertical when the compasses are opened. The tendency of the first leg 2 and the second leg 3 to remain substantially upright means that the center lines of the first leg 2 and the second leg 3 do not remain upright, but means that the entirety of the first leg 2 and the entirety of the second leg 3 are in an upright state, allowing the center lines of the first leg 2 and the second leg 3 to deviate from the vertical direction by a certain angle.
Specifically, as shown in fig. 4, a first rotation shaft portion 121 is provided on the front side of the rear member 12, and one end of the first link 61 and one end of the third link 71 are both rotatably provided on the first rotation shaft portion 121 such that the rotation axis of the first link 61 with respect to the head 1 coincides with the rotation axis of the third link 71 with respect to the head 1. The front side of the rear member 12 is further provided with a second rotating shaft portion 122 and a third rotating shaft portion 123 at an interval, and the second rotating shaft portion 122 and the third rotating shaft portion 123 are both located below the first rotating shaft portion 121. One end of the second link 62 is rotatably provided on the second rotating shaft portion 122, and one end of the fourth link 72 is rotatably provided on the third rotating shaft portion 123, so that the rotation axis of the second link 62 with respect to the head 1 and the rotation axis of the fourth link 72 with respect to the head 1 are parallel.
As shown in fig. 4, the a connecting rod assembly 6 and the B connecting rod assembly 7 are arranged in a linkage manner, so that a user can save more labor in the process of unfolding or folding the compasses, the a connecting rod assembly 6 and the B connecting rod assembly 7 can not easily rotate relatively due to mutual constraint in the circular arc drawing process, and the compass tip 4 and the compass pen 5 are not easy to move relatively in the circular arc drawing process. Specifically, one end of the second link 62 is provided with a first toothed portion 621, and one end of the fourth link 72 is provided with a second toothed portion 721 meshed with the first toothed portion 621, so that the fourth link 72 can rotate the second link 62 in a direction away from the fourth link 72 when the B link assembly 7 rotates in a direction away from the a link assembly 6 with respect to the compass head 1, and the fourth link 72 can rotate the second link 62 in a direction close to the fourth link 72 when the B link assembly 7 rotates in a direction close to the a link assembly 6 with respect to the compass head 1.
The locking structure is a locking cover 8 (see fig. 3) which is at least partially located on the front side of the front part 11 and is detachably connected to the rear part 12. The locking cover 8 is threadedly coupled to the rear member 12 to facilitate detachable coupling of the locking cover 8 to the rear member 12 and to facilitate adjustment of the degree of locking by rotation of the locking cover 8. Specifically, the first rotating shaft portion 121 is provided with a screw hole 121a (see fig. 4), and the rear side of the lock cover 8 is provided with a screw portion 81 (see fig. 5) connected to the screw hole 121a, so that the structure of the compass can be simplified.
Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (8)

1. A compasses, comprising
A compass head (1);
the lower end of the first supporting leg (2) is provided with a compass tip (4);
the lower end of the second supporting leg (3) is provided with a compasses pen (5);
the method is characterized in that: also comprises
An A connecting rod assembly (6) with one end rotatably connected with the compasses head (1) and the other end rotatably connected with the first supporting leg (2), and the rotation of the A connecting rod assembly (6) relative to the compasses head (1) can keep the compasses tip (4) in a basically upright state;
a B connecting rod assembly (7) with one end rotatably connected with the compass head (1) and the other end rotatably connected with the second leg (3), wherein the rotation of the B connecting rod assembly (7) relative to the compass head (1) can keep the compass pen (5) in a basically vertical state;
the locking structure is arranged on the compasses head (1) and can lock the relative angle between the first support leg (2) and the second support leg (3).
2. The compass of claim 1, wherein: the A connecting rod assembly (6) comprises a first connecting rod (61) and a second connecting rod (62) located below the first connecting rod (61), one end of the first connecting rod (61) and one end of the second connecting rod (62) are rotatably connected with the compass head (1), and the other end of the first connecting rod (61) and the other end of the second connecting rod (62) are rotatably connected with the first supporting leg (2); the B connecting rod assembly (7) comprises a third connecting rod (71) and a fourth connecting rod (72) located below the third connecting rod (71), one end of the third connecting rod (71) and one end of the fourth connecting rod (72) are rotatably connected with the compass head (1), and the other end of the third connecting rod (71) and the other end of the fourth connecting rod (72) are rotatably connected with the second supporting leg (3).
3. The compass of claim 2, wherein: the compasses head (1) comprises a front part (11) and a rear part (12), the A connecting rod assembly (6) and the B connecting rod assembly (7) are both positioned between the front part (11) and the rear part (12), and the locking structure is a locking cover (8) which is at least partially positioned on the front side of the front part (11) and is detachably connected with the rear part (12).
4. The compass of claim 3, wherein: the locking cover (8) is in threaded connection with the rear part (12).
5. The compass of claim 4, wherein: a first rotating shaft part (121) is arranged on the front side of the rear part (12), one end of the first connecting rod (61) and one end of the third connecting rod (71) are both rotatably arranged on the first rotating shaft part (121), so that the rotating axis of the first connecting rod (61) relative to the compasses head (1) is superposed with the rotating axis of the third connecting rod (71) relative to the compasses head (1); the first rotating shaft part (121) is provided with a screw hole (121a), and the rear side of the locking cover (8) is provided with a screw rod part (81) connected with the screw hole (121 a).
6. The compass of claim 3, wherein: the upper portion of preceding part (11) extends backward has pothook (111), open on back part (12) have with pothook (111) joint complex card hole (124).
7. The compass according to any one of claims 2 to 6, wherein: and the A connecting rod assembly (6) and the B connecting rod assembly (7) are arranged in a linkage manner.
8. The compass of claim 7, wherein: a second rotating shaft part (122) and a third rotating shaft part (123) are arranged on the compass head (1) at intervals, one end of the second connecting rod (62) is rotatably arranged on the second rotating shaft part (122), and one end of the fourth connecting rod (72) is rotatably arranged on the third rotating shaft part (123); one end of the second link (62) is provided with a first tooth portion (621), and one end of the fourth link (72) is provided with a second tooth portion (721) engaged with the first tooth portion (621).
CN202220246092.1U 2022-01-29 2022-01-29 Compasses Active CN216804965U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220246092.1U CN216804965U (en) 2022-01-29 2022-01-29 Compasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220246092.1U CN216804965U (en) 2022-01-29 2022-01-29 Compasses

Publications (1)

Publication Number Publication Date
CN216804965U true CN216804965U (en) 2022-06-24

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ID=82064970

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220246092.1U Active CN216804965U (en) 2022-01-29 2022-01-29 Compasses

Country Status (1)

Country Link
CN (1) CN216804965U (en)

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