A compass

Abstract

The present invention provides a compass, comprising a pen foot body and a needle foot body which are hingedly connected to each other, the pen foot body is connected to a pen cover, the inner side wall of the pen cover is movably sleeved with a sleeve lock buckle suitable for installing a pen, and the sleeve lock buckle is deformed by relative movement with the pen cover to achieve locking or unlocking of the pen; the needle foot body is connected to a needle shell, and a needle body and a guide head are installed in the needle shell, the needle body includes a needle head, and the guide head is provided with a guide hole for installing the needle head, and part of the needle head extends out of the guide hole when drawing. The present invention arranges a sleeve lock buckle capable of installing a pen in the pen cover of the pen foot body, so that when locking the pen, the contact surface between the sleeve lock buckle and the pen is large, and the pen is prevented from shifting or shaking when drawing, and a guide head is arranged between the needle body and the needle shell of the needle foot body, and the guide head covers the needle head when drawing, which can prevent the needle body from shaking when drawing, and the pin and pen foot of this structure can jointly increase the stability when drawing and improve the accuracy of drawing.

Description

Technical Field

[0001] The invention relates to the technical field of stationery products, and in particular to a compass. Background Art

[0002] A compass generally includes a pen foot for drawing circles or arcs and a pin for positioning on paper. Existing compasses on the market are used for drawing by installing a pen on the pen foot. The pen foot is generally locked in the pen foot by tightening a screw. When locking, the screw is in contact with a local position of the pen, and the pen is prone to shifting or shaking when drawing. In addition, the needle head of the pin of the compass on the market is generally also locked by a screw, and it is also prone to shaking when drawing. Summary of the invention

[0003] To solve at least one aspect of the above problems, the present invention provides a compass, comprising a pen foot body and a needle foot body hingedly connected to each other, the pen foot body being connected to a pen cover, the inner side wall of the pen cover being movably sleeved with a sleeve lock buckle suitable for installing a pen, the sleeve lock buckle being deformed by relative movement with the pen cover to achieve locking or unlocking of the pen, and when locked, the outer wall of the pen abuts against the inner wall of the sleeve lock buckle; the needle foot body being connected to a needle shell, a needle body and a guide head being installed in the needle shell, the needle body including a needle head, the guide head being provided with a guide hole for installing the needle head, the needle shell being provided with an outlet for part of the guide head and part of the needle head to extend out of the needle shell, and when drawing, part of the needle head extends out of the guide hole.

[0004] Optionally, the guide head is movably connected to the needle shell in the up and down directions. When drawing, the guide head contacts the paper surface and moves upward relative to the needle shell to make the needle extend from the guide hole. The guide head has an extreme position when moving upward relative to the needle shell to limit the depth of the needle inserted into the paper surface.

[0005] Optionally, the needle body further comprises a needle tail connected to the upper end of the needle head, and the needle tail is connected to the needle shell.

[0006] Optionally, it further comprises a return spring sleeved outside the needle head, and the upper and lower ends of the return spring are respectively in contact with the needle tail and the guide head.

[0007] Optionally, first clamping blocks are provided on both sides of the outer wall of the needle tail, and the needle shell is provided with clamping holes that cooperate with the first clamping blocks.

[0008] Optionally, it further comprises a clamping block connected to the needle housing, the needle tail is provided with a groove cooperating with the clamping block, the inner wall of the groove is provided with a second clamping block, and the needle tail is provided with a clamping groove cooperating with the second clamping block.

[0009] Optionally, the sleeve lock is rotatably connected to the pen cover, and the outer side wall of the sleeve lock is abutted against the inner side wall of the pen cover.

[0010] Optionally, the radius of the inner wall of the pen cover gradually decreases in the rotational locking direction of the sleeve lock.

[0011] Optionally, the inner hole size of the sleeve lock buckle ranges from 7.3 mm to 8.3 mm.

[0012] Optionally, an outer wall of the sleeve lock is provided with a paddle for driving the sleeve lock to rotate relative to the pen cover, and a side wall of the pen cover is provided with a window for the paddle to move.

[0013] Compared with the prior art, the compass of the present invention has a sleeve lock for mounting the pen inside the pen cover of the pen foot body, so that when the pen is locked, the contact area between the sleeve lock and the pen is large, preventing the pen from shifting or shaking during drawing. A guide head is provided between the needle body and the needle shell of the needle foot body. When drawing, the guide head covers the needle head, which can prevent the needle body from shaking during drawing. The pin and pen foot of this structure can jointly increase the stability during drawing and improve the accuracy of drawing. The sleeve lock fixes the pen and can also prevent local scratches on the pen. It can also solve the problem that the conventional compass is locked with a screw structure, which causes hand pain when the user locks with force. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural diagram of a compass according to an embodiment of the present invention;

[0015] Figure 2 This is a structural diagram of the compass pins of an embodiment of the present invention when not in use;

[0016] Figure 3 is a cross-sectional view of a compass pin according to an embodiment of the present invention;

[0017] Figure 4 A structural diagram of a compass pin in an embodiment of the present invention when drawing;

[0018] Figure 5 The structure of the compass pen foot of the embodiment of the present invention Figure 1 ;

[0019] Figure 6 The structure of the compass pen foot of the embodiment of the present invention Figure 2 .

[0020] Description of reference numerals:

[0021] 1. Needle foot body; 2. Needle shell; 21. Exit; 22. Clamping hole; 23. Positioning platform; 3. Needle body; 31. Needle head; 32. Needle tail; 321. First clamping block; 322. Groove; 323. Second clamping block; 4. Guide head; 41. Guide hole; 5. Reset spring; 6. Clamping block; 61. Clamping slot; 62. Positioning piece; 7. Pen foot body; 8. Pen cover; 81. First limit platform; 82. Window; 9. Sleeve lock; 91. Second limit platform; 92. Pick; 93. Opening. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower" and the like indicate positions or location relationships that are based on the positions or location relationships when the product is normally used.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0025] The embodiment of the present invention provides a compass, combined with Figures 1 to 6 As shown, it includes a pen foot body 7 and a needle foot body 1 which are hingedly connected to each other, the pen foot body 7 is connected to a pen cover 8, the inner side wall of the pen cover 8 is movably sleeved with a sleeve lock buckle 9 suitable for installing the pen, the sleeve lock buckle 9 is deformed by relative movement with the pen cover 8 to achieve locking or unlocking of the pen, and when locked, the outer wall of the pen abuts against the inner wall of the sleeve lock buckle 9; the needle foot body 1 is connected to a needle shell 2, a needle body 3 and a guide head 4 are installed in the needle shell 2, the needle body 3 includes a needle head 31, the guide head 4 is provided with a guide hole 41 for installing the needle head 31, the needle shell 2 is provided with an outlet 21 for part of the guide head 4 and part of the needle head 31 to extend out of the needle shell 2, and when drawing, part of the needle head 31 extends out of the guide hole 41.

[0026] Among them, the sleeve lock buckle 9 can be locked by rotating and deforming, or by moving up and down in the pen cover 8 and deforming and locking; when the sleeve lock buckle 9 is locked, the pen can be locked on the pen foot, and when the sleeve lock buckle 9 is unlocked, the pen and the pen foot can be disengaged, so that the pen can be taken out; the sleeve lock buckle 9 can be deformed by external force, and when the relative position with the pen cover 8 changes, the pen cover 8 can squeeze the sleeve lock buckle 9 to make the inner diameter of the sleeve lock buckle 9 smaller, thereby clamping the pen; the sleeve lock buckle 9 has an opening 93 in the ring direction, when unlocked, the size of the opening 93 is larger, and the inner diameter of the sleeve lock buckle 9 is larger, when locked, the size of the opening 93 is smaller, and the inner diameter of the sleeve lock buckle 9 is smaller; the inner wall of the sleeve lock buckle 9 is an arc surface, and when locked, the inner wall of the sleeve lock buckle 9 has a large contact area with the outer wall of the pen, and it is not easy to crush the pen; the sleeve lock buckle 9 is connected from top to bottom to facilitate the installation of pens of various lengths and ensure universality.

[0027] When drawing, the outer wall of the guide head 4 abuts against the inner wall of the outlet 21 or the gap between them is very small, and the outer wall of the needle head 31 abuts against the inner wall of the guide hole 41 or the gap between them is very small, which can effectively prevent the needle body 3 from shaking.

[0028] The compass in this embodiment is provided with a sleeve lock 9 for mounting the pen in the pen cover 8 of the pen foot body 7, so that when the pen is locked, the contact area between the sleeve lock 9 and the pen is large, preventing the pen from shifting or shaking during drawing. A guide head 4 is provided between the needle body 3 and the needle shell 2 of the needle foot body 1. When drawing, the guide head 4 covers the needle head 31, which can prevent the needle body 3 from shaking during drawing. The needle feet and pen feet of this structure can jointly increase the stability during drawing and improve the accuracy of drawing. The sleeve lock 9 fixes the pen and prevents local scratches on the pen. It can also solve the problem that the conventional compass is locked with a screw structure, which causes hand pain when the user locks with force.

[0029] Optionally, the pen cover 8 and the pen foot body 7 are integrally formed, and the pen cover 8 and the pen foot body 7 are integrally injection molded by plastic parts or integrally die-casted by metal parts. The integrally formed design enables the pen cover 8 to be firmly connected to the pen foot body 7, saves installation steps, and improves production efficiency; the needle shell 2 and the needle foot body 1 are integrally formed, and the needle shell 2 and the needle foot body 1 are integrally injection molded by plastic parts or integrally die-casted by metal parts. The integrally formed design enables the needle shell 2 to be firmly connected to the needle foot body 1, saves installation steps, and improves production efficiency.

[0030] Optionally, combined Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the guide head 4 is movably connected to the needle shell 2 in the up and down directions. When drawing, the guide head 4 contacts the paper surface and moves upward relative to the needle shell 2 to allow the needle 31 to extend from the guide hole 41. The guide head 4 has an extreme position relative to the needle shell 2 to limit the depth of the needle 31 inserted into the paper surface.

[0031] Among them, the up and down direction refers to the direction consistent with the length direction of the needle body 3; the limit position of the guide head 4 relative to the needle shell 2 can be achieved by setting a limit platform in the needle shell 2 to limit the maximum upward position of the guide head 4, or setting a limit platform on the needle body 3 to limit the maximum upward position of the guide head 4, or setting an independent limit block between the guide head 4 and the needle shell 2 or the needle body 3 to limit the maximum upward position of the guide head 4; during the drawing process, the guide head 4 is always in contact with the paper surface; the needle shell 2, the guide head 4 and the needle body 3 are all coaxially arranged to facilitate the guide head 4 to move straight up and down smoothly.

[0032] When not in use, the guide head 4 moves downward under the action of external force or its own gravity, so that the needle body 3 can be hidden in the guide head 4 to prevent the sharp corners of the needle 31 from hurting the user; when drawing, the guide head 4 first contacts the paper surface, and then moves upward under the force. The greater the force with which the user presses the compass downward, the greater the distance the guide head 4 moves upward, that is, different pressures determine different distances the guide head 4 moves upward, which also determines the length of the needle 31 that is extended. In this structure, the maximum length that the needle 31 can extend out of the guide head 4 is when the guide head 4 moves to the topmost extreme position.

[0033] The compass in this embodiment controls the distance that the needle 31 of the needle body 3 extends out of the guide head 4 by moving the guide head 4 up and down, and sets the limit position of the upward movement of the guide head 4, which can effectively control the extension length of the needle 31. When drawing, no matter how much pressure the user uses to operate the compass, since the extension length of the needle 31 is limited, the diameter of the hole rubbed on the paper by the needle 31 can be controlled within a certain size to prevent the hole from being too large. In addition, the operation of extending the needle 31 is achieved by changing the position between the guide head 4 and the needle shell 2. The whole process is completely silent, which helps to improve concentration.

[0034] Optionally, combined Figure 2 , Figure 3 As shown, when not in use, the needle 31 is hidden in the guide hole 41 .

[0035] The guide head 4 can be pushed down and reset by the force of the spring, or can be reset by its own gravity. When not in use, the guide head 4 moves down and resets, and the needle 31 can be completely hidden in the guide hole 41. The hidden needle 31 will not stab the user, and has the function of protecting the hand, with high safety performance.

[0036] Optionally, combined Figure 4 As shown, the maximum depth of the needle 31 inserted into the paper surface is 0.5mm, that is, the maximum length of the needle 31 extending out of the guide head 4 is 0.5mm. Setting this length can not only ensure that the hole rubbed by the needle 31 on the paper surface is very small, so as not to damage the paper, but also ensure that the needle 31 can be firmly positioned on the paper surface, thereby ensuring stable drawing; no matter how much force the user uses, the needle 31 can only extend a maximum of 0.5mm, so the diameter of the hole pierced on the paper surface is very small, the hole is not easy to be seen, and is very small, so as not to damage the paper, and the test paper can be kept neat when used in an exam.

[0037] Optionally, combined Figure 1 , Figure 2 , Figure 3 As shown, the needle body 3 also includes a needle tail 32 connected to the upper end of the needle head 31, and the needle tail 32 is connected to the needle shell 2; the needle body 3 is connected to the needle shell 2 through the needle tail 32, so that the guide head 4 has a movable gap between the needle head 31 and the needle shell 2.

[0038] Optionally, combined Figure 3 As shown, it also includes a return spring 5 sleeved outside the needle head 31, and the upper and lower ends of the return spring 5 are respectively in contact with the needle tail 32 and the guide head 4.

[0039] Among them, the reset spring 5 can push the guide head 4 to reset, ensuring that the guide head 4 can automatically reset, which is safer; when not in use, the guide head 4 moves downward under the spring force of the reset spring 5, so that the needle body 3 is hidden in the guide head 4; when drawing, the guide head 4 first contacts the paper surface, and then the guide head 4 moves up, and the needle 31 is exposed from the guide head 4 and inserted into the paper surface for positioning.

[0040] Optionally, combined Figure 3 As shown, first clamping blocks 321 are provided on both sides of the outer wall of the needle tail 32 , and the needle housing 2 is provided with a clamping hole 22 matched with the first clamping block 321 .

[0041] Among them, the needle body 3 and the needle shell 2 are firmly connected by the cooperation of the first clamping block 321 and the clamping hole 22, and the clamping hole 22 that passes through the wall of the needle shell 2 can facilitate the disassembly of the needle body 3, so that external force acts on the first clamping block 321, so that the first clamping block 321 can be detached from the clamping hole 22, thereby facilitating the replacement of the needle body 3.

[0042] Optionally, combined Figure 2 , Figure 3As shown, it also includes a clamping block 6 connected to the needle housing 2, the needle tail 32 is provided with a groove 322 that cooperates with the clamping block 6, the inner wall of the groove 322 is provided with a second clamping block 323, and the needle tail 32 is provided with a clamping groove 61 that cooperates with the second clamping block 323.

[0043] Among them, the groove 322 is set in the middle position of the needle tail 32, the groove 322 cooperates with the clamping block 6, and through the mutual cooperation of the second clamping block 323 and the clamping groove 61, to ensure the verticality of the needle body 3 in the needle shell 2, and further fix the needle body 3 to prevent the needle body 3 from deviating during the drawing process, thereby ensuring the stability and accuracy of the drawing.

[0044] Optionally, combined Figure 3 As shown, a positioning piece 62 is provided on the top of the clamping block 6 , and a positioning platform 23 abutting against the positioning piece 62 is provided on the needle housing 2 .

[0045] Among them, the positioning piece 62 is in the shape of a disc, and the positioning platform 23 is in the shape of a circular ring. When the positioning piece 62 is embedded in the needle shell 2 from the upper end, it can abut against the positioning platform 23 arranged on the inner wall of the needle shell 2, preventing the clamping block 6 from moving down too much and sinking into the needle shell 2 during assembly. It can also further ensure that the needle body 3 is firmly connected to the needle shell 2, and can also limit the position of the needle body 3 in the needle shell 2; the needle body 3 has space to move in the up and down directions relative to the needle shell 2 to prevent the pin structure from getting stuck.

[0046] Optionally, combined Figure 1 , Figure 5 , Figure 6 As shown, the sleeve lock 9 is rotatably connected to the pen cover 8, and the outer wall of the sleeve lock 9 is abutted against the inner wall of the pen cover 8; the size of the overall inner hole of the sleeve lock 9 is changed by rotating the sleeve lock 9, and the inner wall of the pen cover 8 always contacts the outer wall of the sleeve lock 9, ensuring that the clamping surface acting on the pen is as large as possible, and the structure is more compact, and the pen can be stably clamped without making the pen cover 8 very long.

[0047] Optionally, combined Figure 5 As shown, the radius of the inner wall of the pen cover 8 gradually decreases in the rotational locking direction of the sleeve lock 9; the inner hole of the pen cover 8 is not a perfect circle, and the arc of the inner hole is in the shape of an involute. During the rotation of the sleeve lock 9 in the rotational locking direction, the inner hole size of the sleeve lock 9 gradually decreases under the extrusion of the pen cover 8 until the pen is locked; when the sleeve lock 9 is rotated in the reverse direction, the inner hole size of the sleeve lock 9 gradually increases until it is unlocked, and the pen can be taken out of the sleeve lock 9.

[0048] Optionally, combined Figure 5As shown, the inner wall of the pen cover 8 is provided with a first limit platform 81, and the outer wall of the sleeve lock buckle 9 is provided with a second limit platform 91. When the second limit platform 91 cooperates with the first limit platform 81, the inner hole size of the sleeve lock buckle 9 is maximized; the first limit platform 81 and the second limit platform 91 that cooperate with each other are provided, so that the locking direction of the sleeve lock buckle 9 is unique, preventing the sleeve lock buckle 9 from rotating too much, and ensuring the stability of the locking and unlocking operations.

[0049] Optionally, the inner hole size range of the sleeve lock 9 is 7.3mm to 8.3mm, that is, the maximum outer diameter of the pen that can be placed is 8.3mm, and the minimum outer diameter of the pen that can be placed is 7.3mm. There is no restriction on the shape of the pen, that is, the shape of the pen can be cylindrical or hexagonal, and the pen foot has strong versatility.

[0050] Optionally, combined Figure 1 , Figure 5 , Figure 6 As shown, the outer wall of the sleeve lock 9 is provided with a paddle 92 for driving the sleeve lock 9 to rotate relative to the pen cover 8, and the side wall of the pen cover 8 is provided with a window 82 for the paddle 92 to move.

[0051] Among them, the length direction of the paddle 9 is consistent with the axial direction of the sleeve lock buckle 9, which is convenient for the user to apply force on the sleeve lock buckle 9 to drive the sleeve lock buckle 9 to rotate; the paddle 92 abuts against the edge walls of the upper and lower windows 82 in the axial direction, which plays a role in positioning the sleeve lock buckle 9 and the pen cover 8 in the axial direction, and prevents the sleeve lock buckle 9 from falling out of the pen cover 8; the paddle 92 makes it convenient for the user to easily drive the sleeve lock buckle 9 to rotate, so as to easily lock or unlock the pen; specifically, after the paddle 92 is moved along the locking direction, the two side walls of the opening 93 of the sleeve lock buckle 9 approach each other in the rotation direction, so that the overall inner hole diameter of the sleeve lock buckle 9 becomes smaller, and then the pen is clamped, which solves the problem that the conventional compass is locked with a screw structure, and the user feels pain in the hand when locking.

[0052] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A compass, characterized in that: The invention comprises a pen foot body (7) and a needle foot body (1) which are hingedly connected to each other, wherein the pen foot body (7) is connected to a pen cover (8), and the inner side wall of the pen cover (8) is movably sleeved with a sleeve lock buckle (9) suitable for installing the pen, and the sleeve lock buckle (9) is deformed by relative movement with the pen cover (8) to achieve locking or unlocking of the pen, and when locked, the outer wall of the pen abuts against the inner wall of the sleeve lock buckle (9); the needle foot body (1) is connected to A needle housing (2) is provided, wherein a needle body (3) and a guide head (4) are installed in the needle housing (2), wherein the needle body (3) includes a needle head (31), and the guide head (4) is provided with a guide hole (41) for installing the needle head (31), and the needle housing (2) is provided with an outlet (21) for part of the guide head (4) and part of the needle head (31) to extend out of the needle housing (2), and when drawing, part of the needle head (31) extends out of the guide hole (41); The guide head (4) is movably connected to the needle housing (2) in the up-down direction. When drawing, the guide head (4) contacts the paper surface and moves upward relative to the needle housing (2) so that the needle (31) extends out from the guide hole (41). The guide head (4) first contacts the paper surface and then moves upward after being subjected to force. During the drawing process, the guide head (4) always contacts the paper surface. The guide head (4) has an extreme position when moving upward relative to the needle housing (2) to limit the depth of the needle (31) inserted into the paper surface. The sleeve lock (9) is rotatably connected to the pen cover (8), the outer side wall of the sleeve lock (9) is abutted against the inner side wall of the pen cover (8), the outer side wall of the sleeve lock (9) is provided with a paddle (92) for driving the sleeve lock (9) to rotate relative to the pen cover (8), and the side wall of the pen cover (8) is provided with a window (82) for the movement of the paddle (92), and the size of the overall inner hole of the sleeve lock (9) is changed by rotating the sleeve lock (9), and the inner side wall of the pen cover (8) always contacts the outer side wall of the sleeve lock (9); the inner side wall of the pen cover (8) The radius of the wall curvature gradually decreases in the rotational locking direction of the sleeve lock (9); the arc of the inner hole of the pen cover (8) is in the shape of an involute; during the rotation of the sleeve lock (9) in the rotational locking direction, the inner hole size of the sleeve lock (9) gradually decreases under the extrusion of the pen cover (8) until the pen is locked; the length direction of the paddle (92) is consistent with the axial direction of the sleeve lock (9); the upper and lower surfaces of the paddle (92) in the axial direction abut against the edge wall of the window (82); the sleeve lock (9) is driven to rotate by the paddle (92) to lock or unlock the pen.

2. The compass according to claim 1, characterized in that: The needle body (3) further comprises a needle tail (32) connected to the upper end of the needle head (31), and the needle tail (32) is connected to the needle housing (2).

3. The compass according to claim 2, characterized in that: It also comprises a return spring (5) sleeved on the outside of the needle head (31), and the upper and lower ends of the return spring (5) are respectively in contact with the needle tail (32) and the guide head (4).

4. The compass according to claim 2, characterized in that: First clamping blocks (321) are provided on both sides of the outer wall of the needle tail (32), and the needle housing (2) is provided with a clamping hole (22) that cooperates with the first clamping block (321).

5. The compass according to claim 4, characterized in that: It also includes a clamping block (6) connected to the needle housing (2), the needle tail (32) is provided with a groove (322) that cooperates with the clamping block (6), the inner wall of the groove (322) is provided with a second clamping block (323), and the needle tail (32) is provided with a clamping groove (61) that cooperates with the second clamping block (323).

6. The compass according to claim 1, characterized in that: The inner hole size of the sleeve lock buckle (9) ranges from 7.3 mm to 8.3 mm.

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