Compasses

Abstract

The utility model relates to the technical field of drawing tools, in particular to compasses which comprise a first supporting leg, a second supporting leg and a pen assembly, and the first supporting leg is provided with a compasses needle; the second supporting leg is rotationally connected with the first supporting leg so as to adjust the angle between the second supporting leg and the first supporting leg; the second supporting leg is provided with a first inserting groove, and an avoiding hole is formed in the groove wall of the first inserting groove. The pen assembly comprises a pen and a mounting part, the pen is mounted on the mounting part, the mounting part is provided with a first surface and an elastic arm, the elastic arm is located on one side of the first surface, and a gap is formed between the first surface and the thickness surface of the elastic arm to form a second slot; the elastic arm is provided with a lug boss; the elastic arm is detachably inserted into the first inserting groove, the groove bottom of the first inserting groove is inserted into the second inserting groove, and the protruding part penetrates through the receding hole so that the circumferential side wall of the protruding part can be matched with the hole wall of the receding hole, and it is guaranteed that the pen assembly is stably installed and convenient to disassemble and assemble.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drawing tools, and more particularly to a pair of compasses. Background Art

[0002] A pair of compasses is a commonly used drawing tool. Existing compasses generally include two legs that are movably connected. One leg is equipped with a compass needle, and the other leg is equipped with a pen for drawing. The angle between the two arms can be adjusted as needed for drawing circles.

[0003] In related technologies, to meet the needs of users to draw with different pens (such as pencils, mechanical pencils, ballpoint pens, etc.), some products detachably mount different types of pen assemblies on the other leg by magnetic attraction. However, this magnetic attraction method has at least the following problems: If the magnetic attraction is strong, it is difficult to disassemble, and forced plugging and unplugging may cause the pencil tip to break; if the magnetic attraction is small, it will cause looseness, and the position of the pen tip is likely to change during drawing, resulting in an incomplete and irregular circle being drawn. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a pair of compasses to facilitate the installation and disassembly of the pen assembly and improve the installation stability of the pen assembly at the same time.

[0005] Based on the above purpose, the present disclosure provides a pair of compasses, including:

[0006] A first leg, the first leg is provided with a compass needle;

[0007] A second leg, the second leg is rotatably connected to the first leg to adjust the angle between the second leg and the first leg; the second leg is provided with a first slot, and the slot wall of the first slot is provided with an avoidance hole; and

[0008] A pen assembly, the pen assembly includes a pen and a mounting portion, the pen is mounted on the mounting portion, the mounting portion has a first surface, the mounting portion is provided with an elastic arm, the elastic arm is located on one side of the first surface, and there is a gap between the first surface and the thickness surface of the elastic arm to form a second slot; the elastic arm is provided with a protruding portion; the elastic arm is detachably inserted into the first slot, the bottom of the first slot is inserted into the second slot, and the protruding portion passes through the avoidance hole so that the circumferential side wall of the protruding portion cooperates with the hole wall of the avoidance hole.

[0009] In an embodiment of the present disclosure, the slot wall of the first slot is provided with a limiting plate, and the distance between the limiting plate and the bottom of the first slot is adapted to the width of the elastic arm.

[0010] In one embodiment of the present disclosure, a limiting groove is provided on the outer surface of the bottom of the first slot, and the first surface is in contact with the bottom of the limiting groove.

[0011] In one embodiment of the present disclosure, the limiting groove has a first groove wall, a second groove wall, and a third groove wall. The first groove wall and the second groove wall are parallel, and the third groove wall is connected between the first groove wall and the second groove wall.

[0012] In one embodiment of the present disclosure, the mounting portion further has a second surface, which is smoothly transitioned with the first surface, and the second surface is in contact with the third groove wall;

[0013] Or, an extension plate is provided on the mounting portion. The surface of the extension plate facing the elastic arm is coplanar with the first surface, and the end surface of the free end of the extension plate is in contact with the third groove wall.

[0014] In one embodiment of the present disclosure, a guiding inclined surface is provided on the surface of the protruding portion away from the elastic arm. Along the direction from the notch to the bottom of the second slot, the distance between the guiding inclined surface and the elastic arm gradually decreases.

[0015] In one embodiment of the present disclosure, the avoidance holes are provided on both groove walls of the first slot; the number of the elastic arms is two, and the two elastic arms are spaced along the width direction of the first slot.

[0016] In one embodiment of the present disclosure, guiding surfaces are formed on the sides of the two elastic arms away from each other. The guiding surfaces are provided near the free ends of the elastic arms, so that the distance between the free ends of the two elastic arms is less than the distance between the two groove walls of the first slot.

[0017] In one embodiment of the present disclosure, the shape of the avoidance hole is trapezoidal.

[0018] In one embodiment of the present disclosure, anti-slip lines are provided on the outer surface of the protruding portion.

[0019] The beneficial effects of the present disclosure mainly lie in:

[0020] When the compass provided by the present disclosure is in use, the elastic arm is inserted into the first slot, and at the same time, the bottom of the first slot is inserted into the second slot. During the insertion process, the elastic arm undergoes elastic deformation, causing the protrusion to enter the first slot. When the insertion is in place, the protrusion is aligned with the avoidance hole. Under the elastic force of the elastic arm, the protrusion can pass through the avoidance hole to be located outside the first slot. At this time, the circumferential side wall of the protrusion cooperates with the hole wall of the avoidance hole to prevent the pen assembly from detaching from the first slot. When the pen assembly needs to be disassembled, the user can press the protrusion in the direction of the first slot, causing the elastic arm to undergo elastic deformation, so that the protrusion disengages from the avoidance hole, releasing the limiting effect of the hole wall of the avoidance hole on the protrusion, and then the pen assembly can be conveniently disassembled from the second leg. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural schematic diagram of the compass provided by the embodiment of the present disclosure;

[0023] Figure 2 Front view of the compass provided by the embodiment of the present disclosure (the first leg is not shown);

[0024] Figure 3 is Figure 2 Cross-sectional view along line A-A of

[0025] Figure 4 is Figure 2 Cross-sectional view along line B-B of

[0026] Figure 5 Structural schematic diagram of the pen assembly in the compass provided by the embodiment of the present disclosure;

[0027] Figure 6 Another perspective structural schematic diagram of the pen assembly in the compass provided by the embodiment of the present disclosure;

[0028] Figure 7 Structural schematic diagram of the second leg in the compass provided by the embodiment of the present disclosure;

[0029] Figure 8 Another structural schematic diagram of the pen assembly in the compass provided by the embodiment of the present disclosure;

[0030] Figure 9Another structural schematic diagram of the compass provided by the embodiments of the present disclosure.

[0031] The reference numerals are explained as follows:

[0032] 10 - First leg; 11 - Compass needle; 20 - Second leg; 21 - First slot; 210 - Bottom of the slot; 211 - Avoidance hole; 212 - Limiting plate; 213 - Limiting groove; 2131 - First groove wall; 2132 - Second groove wall; 2133 - Third groove wall; 2134 - Inclined side wall; 2135 - First arc transition surface; 30 - Pen assembly; 31 - Pen; 32 - Mounting portion; 321 - First surface; 322 - Elastic arm; 3221 - Protrusion; 3221a - Guide inclined surface; 3222 - Guide surface; 323 - Second slot; 324 - Second surface; 325 - Second arc transition surface; 326 - Extension plate; 327 - Third arc transition surface; 40 - Needle tip protection cap; 50 - Rotating handle. Detailed implementation manners

[0033] The technical solutions of the present disclosure will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0034] In the description of the present disclosure, it should be noted that terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure. In addition, terms such as "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0036] See Figures 1 to 9As shown in the figure, this embodiment provides a pair of compasses, which includes a first leg 10, a second leg 20 and a pen assembly 30. The first leg 10 is provided with a compass needle 11; the second leg 20 is rotatably connected to the first leg 10 to adjust the angle between the second leg 20 and the first leg 10; the second leg 20 is provided with a first slot 21, and the slot wall of the first slot 21 is provided with an avoidance hole 211; the pen assembly 30 includes a pen 31 and a mounting portion 32. The pen 31 is mounted on the mounting portion 32. The mounting portion 32 has a first surface 321. The mounting portion 32 is provided with an elastic arm 322. The elastic arm 322 is located on one side of the first surface 321. There is a gap between the first surface 321 and the thickness surface of the elastic arm 322 to form a second slot 323; the elastic arm 322 is provided with a protrusion 3221; the elastic arm 322 is detachably inserted into the first slot 21, the bottom 210 of the first slot 21 is inserted into the second slot 323, and the protrusion 3221 passes through the avoidance hole 211 so that the circumferential side wall of the protrusion 3221 cooperates with the hole wall of the avoidance hole 211.

[0037] For the pair of compasses provided in this embodiment, when in use, the elastic arm 322 is inserted into the first slot 21, and at the same time, the bottom 210 of the first slot 21 is inserted into the second slot 323. During the insertion process, the elastic arm 322 undergoes elastic deformation, so that the protrusion 3221 enters the first slot 21. When the insertion is in place, the protrusion 3221 is aligned with the avoidance hole 211. Under the elastic force of the elastic arm 322, the protrusion 3221 can pass through the avoidance hole 211 to be located outside the first slot 21. At this time, the circumferential side wall of the protrusion 3221 cooperates with the hole wall of the avoidance hole 211 to prevent the pen assembly 30 from detaching from the first slot 21. When it is necessary to disassemble the pen assembly 30, the user can press the protrusion 3221 in the direction of the first slot 21, so that the elastic arm 322 undergoes elastic deformation, so that the protrusion 3221 disengages from the avoidance hole 211, releasing the limiting effect of the hole wall of the avoidance hole 211 on the protrusion 3221, and then the pen assembly 30 can be conveniently disassembled from the second leg 20.

[0038] It should be understood that the width direction of the first slot 21 is substantially perpendicular to the width direction of the second slot 323. After the mounting portion 32 and the second leg 20 are mounted, the mounting portion 32 and the second leg 20 are actually limited and matched in two substantially perpendicular directions. At the same time, the limiting cooperation between the circumferential side wall of the protrusion 3221 and the hole wall of the avoidance hole 211 can prevent the mounting portion 32 from falling out of the slot opening of the first slot 21. Therefore, the pair of compasses provided in this embodiment can limit the pen assembly 30 in three directions at the same time, thereby improving the installation stability of the pen assembly 30.

[0039] Exemplarily, the pen can include a wooden pencil, a mechanical pencil or a ballpoint pen.

[0040] In this embodiment, the pen assembly 30 can be one or multiple. Exemplarily, when the pen assembly 30 is one, the installation part 32 can be adapted to install pens of different types and pens with different outer diameters. When the pen assembly 30 is multiple, each pen assembly 30 can include pens of different types, and the pens in each pen assembly 30 are matched with the installation part 32. When it is necessary to replace pens of different types, the pen assembly 30 can be directly replaced.

[0041] It should be understood that the installation method between the pen in the pen assembly 30 and the installation part 32 should be understandable to those skilled in the art and is well-known and easy to implement for those skilled in the art. Therefore, this embodiment will not be described in detail.

[0042] In this embodiment, the compass further includes a tip protection cap 40 and a rotating handle 50.

[0043] In one embodiment, as shown in Figure 4 the groove wall of the first slot 21 is provided with a limiting plate 212, and the distance between the limiting plate 212 and the bottom 210 of the first slot 21 is adapted to the width of the elastic arm 322.

[0044] The first slot 21 has two groove walls, and limiting plates 212 are provided on both groove walls. The limiting plates 212 are in the shape of narrow strips, and there is a gap between the two limiting plates 212. This is convenient for processing, and at the same time, it can also save the material consumption, thereby reducing the cost.

[0045] By providing the limiting plate 212, the limiting plate 212 cooperates with the bottom 210 of the first slot 21. When the pen assembly 30 is inserted or the installation part 32 is inserted alone, the space between the limiting plate 212 and the bottom 210 of the first slot 21 forms a guiding channel, which can guide the elastic arm 322 into the first slot 21. At the same time, when the installation is in place, it can also ensure that the protrusion 3221 is aligned with the avoidance hole 211, realizing the quick pop-up of the protrusion 3221, improving the installation convenience and installation efficiency.

[0046] Of course, the limiting plate 212 can be one, and the two groove walls are respectively fixedly connected to both sides of the limiting plate 212.

[0047] Exemplarily, the installation part 32 is an integrally formed structure. The material of the installation part 32 can be plastic and is formed by an injection molding method.

[0048] In one embodiment, as shown in Figure 7 the outer surface of the bottom 210 of the first slot 21 is provided with a limiting groove 213, and the first surface 321 is attached to the bottom of the limiting groove 213.

[0049] Exemplarily, the limiting groove 213 has a first groove wall 2131, a second groove wall 2132, and a third groove wall 2133. The first groove wall 2131 and the second groove wall 2132 are parallel, and the third groove wall 2133 is connected between the first groove wall 2131 and the second groove wall 2132.

[0050] In this embodiment, an inclined side wall 2134 is formed between the first groove wall 2131 and the third groove wall 2133, and an inclined side wall 2134 is also formed between the second groove wall 2132 and the third groove wall 2133.

[0051] The bottom of the limiting groove 213 is smoothly transitioned with the third groove wall 2133 to form a first arc transition surface 2135.

[0052] In one embodiment, as shown in Figure 5 the mounting portion 32 further has a second surface 324. The second surface 324 can be the top surface of the mounting portion 32, and a second arc transition surface 325 is formed between the second surface 324 and the first surface 321.

[0053] Exemplarily, the mounting portion 32 can be presented in the form of a housing, and a through hole is provided on the first surface 321, and the through hole communicates with the inner cavity of the housing. Such a method can save the material consumption and reduce the production cost.

[0054] When installed in place, the first surface 321 is in contact with the bottom of the limiting groove 213. At the same time, the second surface 324 abuts against the third groove wall 2133, and the second arc transition surface 325 is in contact with the first arc transition surface 2135.

[0055] In another embodiment, as shown in Figure 8 and Figure 9 the mounting portion 32 is provided with an extension plate 326. The surface of the extension plate 326 facing the elastic arm 322 is coplanar with the first surface 321, and the end surface of the free end of the extension plate 326 abuts against the third groove wall 2133. The extension plate 326 and the mounting portion 32 are integrally formed, and a third arc transition surface 327 is formed between the end surface of the free end of the extension plate 326 and the first surface 321.

[0056] When installed in place, the first surface 321 is in contact with the bottom of the limiting groove 213. At the same time, the end surface of the free end of the extension plate 326 abuts against the third groove wall 2133, and the third arc transition surface 327 is in contact with the first arc transition surface 2135.

[0057] In one embodiment, as shown in Figure 3 and Figure 5As shown, a guiding inclined surface 3221a is provided on the surface of the convex portion 3221 away from the elastic arm 322. Along the direction from the notch to the bottom of the second slot 323, the distance between the guiding inclined surface 3221a and the elastic arm 322 gradually decreases. In this way, it is convenient to easily disengage the convex portion 3221 from the avoidance hole 211 during disassembly.

[0058] Specifically, since the distance between the end of the guiding inclined surface 3221a close to the bottom of the second slot 323 and the elastic arm 322 is small, when pressing the convex portion 3221, it is not necessary to use a large force to push the part of the convex portion 3221 provided with the guiding inclined surface 3221a away from the avoidance hole 211. Then, by pulling the pen assembly 30, an extrusion force is applied to the guiding inclined surface 3221a through the slot wall of the first slot 21, causing the elastic arm 322 to elastically deform into the first slot 21, thereby separating the pen assembly 30 from the second leg 20.

[0059] In one embodiment, as shown in Figure 7 As shown, avoidance holes 211 are provided on both slot walls of the first slot 21; the number of elastic arms 322 is two, and the two elastic arms 322 are spaced along the width direction of the first slot 21. This can form a buffer space between the two elastic arms 322, which is beneficial to the elastic deformation of the elastic arms 322.

[0060] In this embodiment, guiding surfaces 3222 are formed on the sides of the two elastic arms 322 away from each other. The guiding surfaces 3222 are arranged close to the free ends of the elastic arms 322, so that the distance between the free ends of the two elastic arms 322 is less than the distance between the two slot walls of the first slot 21. When inserting the pen assembly 30, the free ends of the elastic arms 322 can easily enter between the two slot walls of the first slot 21, which is beneficial to quickly install the pen assembly 30.

[0061] Exemplarily, the guiding surface 3222 can be an inclined surface or a curved surface, as long as it can achieve the guiding function.

[0062] In some embodiments, as shown in Figure 7 As shown, the shape of the avoidance hole 211 is trapezoidal. The shapes and sizes of the avoidance holes 211 provided on the two slot walls of the first slot 21 are the same, which is convenient for production and processing and has a relatively beautiful appearance.

[0063] In some embodiments, anti-slip patterns are provided on the outer surface of the convex portion 3221. When it is necessary to disassemble the pen assembly 30 from the second leg 20, when the user holds the convex portion 3221 and pushes the installation portion 32 in the direction close to the notch of the first slot 21, the anti-slip patterns can play an anti-slip role, increasing the friction between the finger and the convex portion 3221, and thus facilitating the disassembly of the pen assembly 30.

[0064] Exemplarily, the anti-slip pattern and the protrusion 3221 can also be integrally formed by injection molding.

[0065] In some embodiments, an identification portion is provided on the outer surface of the groove wall of the first slot 21 for indicating to press the protrusion 3221 so that the pen assembly 30 is separated from the second leg 20.

[0066] Exemplarily, the identification portion can be, but is not limited to, "PRESS".

[0067] Of course, in other embodiments, the identification portion may not be provided.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A compass, characterized in that: include: A first leg, wherein the first leg is provided with a compass needle; A second leg, wherein the second leg is rotatably connected to the first leg to adjust the angle between the second leg and the first leg; the second leg is provided with a first slot, and a slot wall of the first slot is provided with an avoidance hole; as well as A pen assembly, the pen assembly comprising a pen and a mounting portion, the pen being mounted on the mounting portion, the mounting portion having a first surface, the mounting portion being provided with an elastic arm, the elastic arm being located on one side of the first surface, a gap being provided between the first surface and a thickness surface of the elastic arm to form a second slot; the elastic arm being provided with a protruding portion; the elastic arm being detachably plugged into the first slot, the bottom of the first slot being plugged into the second slot, the protruding portion being penetrated through the avoidance hole so that the circumferential side wall of the protruding portion matches with the hole wall of the avoidance hole.

2. The compass according to claim 1, characterized in that: A limit plate is provided on the groove wall of the first groove, and the distance between the limit plate and the groove bottom of the first groove is matched with the width of the elastic arm.

3. The compass according to claim 1, characterized in that: A limiting groove is arranged on the outer surface of the groove bottom of the first slot, and the first surface is in contact with the groove bottom of the limiting groove.

4. The compass according to claim 3, characterized in that: The limiting groove has a first groove wall, a second groove wall and a third groove wall, the first groove wall is parallel to the second groove wall, and the third groove wall is connected between the first groove wall and the second groove wall.

5. The compass according to claim 4, characterized in that: The mounting portion further comprises a second surface, the second surface and the first surface have a smooth transition, and the second surface abuts against the third groove wall; Alternatively, the mounting portion is provided with an extension plate, a surface of the extension plate facing the elastic arm is coplanar with the first surface, and an end surface of a free end of the extension plate abuts against the third groove wall.

6. The compass according to claim 1, characterized in that: A guide slope is arranged on a surface of the protrusion away from the elastic arm, and a distance between the guide slope and the elastic arm gradually decreases along a direction from a notch opening to a bottom of the second slot.

7. The compass according to claim 1, characterized in that: The two slot walls of the first slot are both provided with the avoidance hole; the number of the elastic arms is two, and the two elastic arms are arranged at intervals along the width direction of the first slot.

8. The compass according to claim 5, characterized in that: A guide surface is formed on one side of the two elastic arms away from each other, and the guide surface is arranged close to the free ends of the elastic arms so that the distance between the free ends of the two elastic arms is smaller than the distance between the two slot walls of the first slot.

9. The compass according to any one of claims 1 to 8, characterized in that The avoidance hole is in a trapezoidal shape.

10. The compass according to any one of claims 1 to 8, characterized in that The outer surface of the raised portion is provided with anti-slip grooves.

Images