Compasses with locking mechanism

Abstract

The utility model discloses a compass with a locking mechanism, which comprises a compass head, a first support leg and a second support leg, the first support leg and the second support leg are both rotatably mounted on the compass head, the compass further comprises the locking mechanism, the locking mechanism comprises a lock knob and a locking piece, the compass head comprises a first side wall and a second side wall, and the lock knob is rotatably mounted on the first side wall. The lock knob is rotationally installed on the first side wall, one end of the locking piece is installed on the second side wall, the other end of the locking piece is in transmission connection with the lock knob, a user only needs to apply force to the lock knob, the distance between the first supporting foot and the second supporting foot can be locked and unlocked, and use is labor-saving and convenient. And the two sides of the first supporting leg and the two sides of the second supporting leg can bear locking acting force, stress is balanced, the locking effect is good, and the locking mechanism is simple and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of stationery products, and more specifically to a compass with a locking mechanism. Background Art

[0002] A conventional compass comprises a compass head and two legs, wherein the end of one of the two legs is provided with a needle tip for locating the center of a circle, and the other leg is provided with a lead core for drawing a circle or an arc, and both legs are rotatably mounted on the compass head. When in use, the two legs need to be rotated and opened to a suitable distance first, and the distance is the radius of the circle to be drawn. If the connecting force between the two legs is too large, it will be difficult to rotate and open and close; if the connecting force between the two legs is too small, it will cause the legs to be easily displaced, affecting the accuracy of the drawn circle or arc. Therefore, a compass is needed that can lock the distance between the two legs while not affecting the rotation and opening and closing of the two legs.

[0003] In response to the above problems, a utility model patent with publication number: CN218577370U discloses a compass with a locking device, including a compass head, a positioning foot and a rotating foot, the top ends of the positioning foot and the rotating foot are relatively hinged and embedded in the compass head, and the characteristic is that a locking device is provided on the side of the compass head parallel to the opening and closing direction of the positioning foot and the rotating foot, and the locking device includes a lock that can be flipped relative to the compass head, and the lock is provided with an extrusion part, which can squeeze the side of the compass head to deform it inward and then lock the positioning foot and the rotating foot, thereby preventing the two from rotating relative to each other. In this technical solution, a flippable lock buckle is directly provided on the side of the compass head. When the lock buckle is flipped, the extrusion portion of the lock buckle directly squeezes the side of the compass head, causing it to deform inward and quickly lock the positioning foot and the rotating foot to prevent the two from rotating relative to each other. By quickly pressing down the lock buckle and quickly lifting the lock buckle, the positioning foot and the rotating foot are fixed and rotated respectively, thereby achieving the locking purpose. However, in this solution, the extrusion portion of the lock buckle directly acts on the side of the compass head, and the positioning foot and the rotating foot are locked by the deformation force generated on the side of the compass head. The force generated by the extrusion portion mostly acts on the side of the compass head. Therefore, the locking force on the positioning foot and the rotating foot is small, and only one side of the positioning foot and the rotating foot is subjected to the locking force. The positioning foot and the rotating foot still have rotation gaps through the side of the other side of the compass head, and the locking effect is poor. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a compass with a locking mechanism, which has the advantages of reliable locking, convenient assembly, simple structure, labor-saving use, etc.

[0005] The utility model provides a compass with a locking mechanism, comprising a compass head, a first leg and a second leg, the first leg and the second leg are both rotatably mounted on the compass head, and also comprising a locking mechanism, the locking mechanism comprising a locking button and a locking member, the compass head comprising a first side wall and a second side wall, the locking button is rotatably mounted on the first side wall, one end of the locking member is mounted on the second side wall, the other end of the locking member is transmission-connected with the locking button, the locking member cooperates with the locking button to tighten the first side wall and the second side wall so that the first leg and the second leg are rotationally locked or to loosen the first side wall and the second side wall so that the first leg and the second leg are rotationally unlocked.

[0006] In the technical solution, the first leg and the second leg are adjusted in distance from each other by rotating to open or close relative to each other, thereby adjusting the radius of the circle to be drawn. The locking mechanism is provided with a locking button and a locking member in transmission connection. The locking button is used to drive the locking member to tighten or loosen. The locking button is rotatably mounted on the first side wall of the compass head, and one end of the locking member is mounted on the second side wall of the compass head. The locking button cooperates with the locking member to tighten the first side wall and the second side wall, so that the first side wall and the second side wall cooperate to compress the head of the first leg and the head of the second leg, so that the gap between the head of the first leg and the head of the second leg is The first leg and the second leg are squeezed and locked tightly, and the first leg and the second leg are in a rotationally locked state and cannot be rotated to open and close, so as to lock the distance between the first leg and the second leg. The locking button is rotated under force to loosen the locking member, and the first side wall and the second side wall are not subjected to the tightening force, so that there is a gap between the head of the first leg and the head of the second leg, and the first leg and the second leg can rotate freely. The locking button drives the locking member to tighten or loosen by rotating, so as to realize the rotation locking or unlocking of the first leg and the second leg; when the first leg and the second leg are relatively rotated to a suitable distance, the user applies force to the locking button so that the locking button is relative to the compass The compass head rotates, and the locking button abuts against the first side wall by rotating. The locking button drives the locking member to move in the direction away from the compass head by rotating, and the locking member is forced to squeeze the second side wall. The first side wall and the second side wall are pressed inward by the squeezing force, so that the head of the first leg and the head of the second leg are rotated and locked, and the distance between the first leg and the second leg is locked, thereby ensuring the accuracy of drawing a circle or arc. When the distance between the first leg and the second leg needs to be readjusted, the user applies force to the locking button to make the locking button rotate in the opposite direction relative to the compass head, and the locking button drives the locking member to move in the direction of the compass head by rotating in the opposite direction. The first leg and the second leg are automatically reset, and the locking member no longer presses the second side wall inwardly, and the first side wall and the second side wall are not subject to the squeezing force and are reset, so that the head of the first leg and the head of the second leg are rotated and unlocked, and the distance between the first leg and the second leg can be readjusted. The user only needs to apply force to the lock button to lock and unlock the distance between the first leg and the second leg, which is labor-saving and convenient to use. The locking of the first leg and the second leg is achieved by pressing the first side wall and the second side wall inwardly, and both sides of the first leg and the second leg can be subjected to the locking force, the force is balanced and the locking effect is good, and the locking mechanism is simple and reliable.

[0007] As an improvement, the locking button is provided with a first flat surface and a second flat surface adapted to the first side wall. When the locking button cooperates with the locking member to tighten the first side wall and the second side wall, the locking button is positioned by abutting against the first side wall through the first flat surface so that the first leg and the second leg remain in a rotationally locked state. When the locking button cooperates with the locking member to loosen the first side wall and the second side wall, the locking button is positioned by abutting against the first side wall through the second flat surface so that the first leg and the second leg remain in a rotationally unlocked state. The locking knob is configured to be adapted to engage the first and second side walls of the locking knob and to engage with the first and second side walls of the locking knob so that the locking knob can be locked. The first side wall is in abutment with the locking button to stop the rotation, so that the head of the first leg and the head of the second leg remain in a rotationally locked state, thereby ensuring the accuracy of drawing a circle or arc. When the distance between the first leg and the second leg needs to be readjusted, the user applies force to the locking button to make the locking button rotate in the opposite direction relative to the compass head. The locking button disengages the first flat surface from the first side wall and abuts the second flat surface against the first side wall through reverse rotation. The locking button drives the locking member to move in the direction of the compass head and reset to release the second side wall through reverse rotation, so that the head of the first leg and the head of the second leg are rotated and unlocked, and the second flat surface is in abutment with the first side wall to stop the locking button from rotating, so that the head of the first leg and the head of the second leg remain in a rotationally unlocked state. By providing the first flat surface and the second flat surface, the user does not need to keep applying force to the locking button to stop the locking button from rotating, which is more labor-saving to use.

[0008] As an improvement, the locking member is in an L-shaped structure, and the locking member includes a first connecting rod and a second connecting rod, the first connecting rod is fitted with the second side wall, and the second connecting rod is in transmission connection with the locking button. In this technical solution, one end of the locking member is installed on the second side wall, and the other end of the locking member is in transmission connection with the locking button installed on the first side wall. The locking member is provided with an L-shaped structure formed by the first connecting rod and the second connecting rod, and the first connecting rod is fitted with the second side wall, and the second connecting rod is in transmission connection with the locking button. The second connecting rod is driven by the force of the locking button to move in a direction away from the compass head, and the first connecting rod is forced to squeeze the second side wall, thereby locking the first leg and the second leg. The L-shaped locking member has a better fitting effect with the compass head, and the first connecting rod fits with the surface of the second side wall, which has little effect on the volume of the compass.

[0009] As an improvement, the second side wall is provided with a first receiving groove adapted to the first connecting rod, the first connecting rod is installed in the first receiving groove, and the surface of the first connecting rod is flush with the surface of the second side wall. In this technical solution, the first connecting rod is fitted with the surface of the second side wall to abut against the second side wall, and the first receiving groove is provided on the second side wall to accommodate the first connecting rod, so that the surface of the first connecting rod is flush with the surface of the second side wall, and the first connecting rod is hidden in the first receiving groove, which is conducive to reducing the volume of the compass and reasonably distributing the space.

[0010] As an improvement, a channel for the locking member to pass through is provided between the first leg and the second leg, a first groove is provided on the side of the first leg close to the second leg, and a second groove is provided on the second leg to communicate with the first groove, and the first groove and the second groove are combined to form a channel. In this technical solution, a channel is provided between the first leg and the second leg for the locking member to pass through, and the locking member passes through the channel through the second connecting rod to be transmission-connected with the locking button, and the second connecting rod passes through the channel to connect the locking button without interfering with the rotation of the first leg and the second leg, and does not affect the rotation efficiency, a first groove is provided on the side of the first leg close to the second leg, and a second groove is provided on the side of the second leg close to the first leg, and the first groove is communicated with the second groove to form a channel, and the locking member does not interfere with the rotation of the first leg and the second leg through the channel, and the first groove and the second groove have simple structures.

[0011] As an improvement, the second connecting rod is provided with a linkage shaft, the locking button is provided with a guide groove adapted to the linkage shaft, and the linkage shaft is slidably installed in the guide groove. In this technical solution, by providing a linkage shaft on the second connecting rod and a guide groove on the locking button, the linkage shaft and the guide groove are slidably matched to realize the transmission connection between the locking member and the locking button, the locking button is rotated by force and cooperates with the linkage shaft through the guide groove to drive the locking member to tighten or loosen, the reliability of the locking member through the linkage shaft and the locking button is higher, the guide groove is arranged in an arc shape, and the guide groove has a sliding guiding effect on the linkage shaft, so that the locking mechanism is smoother and more labor-saving to use, and the linkage shaft and the guide groove have a simple structure and reliable matching.

[0012] As an improvement, an inclined section is provided between the second connecting rod and the linkage shaft, and the inclined section is inclined toward the lock button. In this technical solution, the second connecting rod passes through the channel between the first leg and the second leg to connect the lock button through the linkage shaft. By providing an inclined section between the second connecting rod and the linkage shaft, the second connecting rod engages the linkage shaft through the inclined section, and the inclined section is inclined toward the lock button, so that the linkage shaft is closer to the lock button, the linkage shaft and the lock button are more compact, and the transmission efficiency is higher. Preferably, the inclined section is arc-shaped, so that the lock button and the locking member are not easy to interfere with each other during movement, and the transmission efficiency is higher.

[0013] As an improvement, a mounting seat adapted to the locking button is provided on the first side wall, and the locking button is provided with a first connecting shaft adapted to the mounting seat, and the end of the first connecting shaft is rotatably connected to the mounting seat so that the locking button is rotatably connected to the first side wall. In this technical solution, by providing a mounting seat on the compass head and installing the first connecting shaft on the end of the locking button, both ends of the first connecting shaft are rotatably mounted on the mounting seat, so that the locking button is rotatably mounted on the first side wall, the assembly is simple and reliable, the locking button is forced to rotate around the first connecting shaft, and the rotation efficiency is higher.

[0014] As an improvement, a second connecting shaft is installed on the compass head, a first through hole is provided on the head of the first leg, a second through hole is provided on the head of the second leg, a third through hole is provided on one end of the locking member, and the second connecting shaft passes through the first through hole, the second through hole and the third through hole to be connected with a fastener. In this technical solution, by installing the second connecting shaft on the compass head, a first through hole for the second connecting shaft to pass through is provided on the head of the first leg, a second through hole for the second connecting shaft to pass through is provided on the head of the second leg, a third through hole for the second connecting shaft to pass through is provided at the end of the locking member, the second connecting shaft passes through the first through hole, the second through hole and the third through hole to connect the compass head, and the second connecting shaft is limited on the compass head by the fastener, so that the first leg, the second leg and the locking member are all limited on the compass head, the first leg and the second leg locking members cannot be separated from the compass head, the first leg and the second leg can rotate around the second connecting shaft to open and close, the assembly and rotation efficiency is improved, and the overall structure is more compact.

[0015] As an improvement, the lock button is provided with an operating part, the operating part is inclined toward the side away from the compass head, and the operating part is subjected to force to drive the lock button to rotate. In this technical solution, the user locks and unlocks the distance between the first leg and the second leg by applying force to the lock button. By setting the operating part on the lock button, the operating part is inclined toward the side away from the compass head, that is, the operating part is inclined outward, the distance between the operating part and the compass head is greater than the distance between the lock button body and the compass head, and the operating part is more prominent, so that it is convenient for the user to apply force. The user can rotate the lock button by applying force to the operating part. The operating part conforms to the ergonomic design, and the operation is more labor-saving and comfortable.

[0016] As an improvement, a splitting plate is installed between the head of the first leg and the head of the second leg, the splitting plate is provided with a second receiving groove, the head of the first leg is provided with a first rotating protrusion adapted to the second receiving groove, the head of the second leg is provided with a second rotating protrusion adapted to the second receiving groove, the first rotating protrusion and the second rotating protrusion are both rotatably inserted in the second receiving groove, and the first leg and the second leg are linked by the splitting plate. In this technical solution, a splitting plate is installed between the first leg and the second leg, and the first leg and the second leg are linked by the splitting plate, so that the rotation efficiency of the first leg and the second leg is higher, by providing the second receiving groove on the splitting plate, providing the first rotating protrusion on the head of the first leg, and providing the second rotating protrusion on the head of the second leg, the first rotating protrusion and the second rotating protrusion are respectively inserted at both ends of the second receiving groove, and the first leg and the second leg are linked by the cooperation of the first rotating protrusion, the second rotating protrusion and the second receiving groove, thereby improving the rotation and locking efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of a compass with a locking mechanism according to the present application.

[0018] Figure 2 This is a schematic diagram of the exploded structure of a compass with a locking mechanism according to the present application.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the locking member in this application.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the first leg and the second leg in this application.

[0021] Figure 5 It is a cross-sectional schematic diagram of the compass of the present application in a rotationally locked state.

[0022] Figure 6 This is a schematic cross-sectional view of the compass of the present application in a rotationally unlocked state.

[0023] Figure 7 This is an exploded schematic diagram of the first leg, the dividing plate and the second leg in this application.

[0024] Figure 8 It is a schematic diagram of the three-dimensional structure of the compass in this application.

[0025] As shown in the figure: 1. compass head; 11. first side wall; 111. mounting seat; 12. second side wall; 121. first accommodating groove; 13. second connecting shaft; 2. first support leg; 21. first groove; 22. first through hole; 23. first rotating protrusion; 3. second support leg; 31. second groove; 32. second through hole; 33. second rotating protrusion; 4. locking button; 41. guide groove; 42. first connecting shaft; 43. operating part; 44. first flat surface; 45. second flat surface; 5. locking member; 51. first connecting rod; 52. second connecting rod; 521. linkage shaft; 522. inclined section; 53. third through hole; 6. passage; 7. fastener; 8. dividing plate; 81. second accommodating groove. DETAILED DESCRIPTION

[0026] In order to better understand the present application, a more detailed description of various aspects of the present application will be made with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0027] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0028] It should also be understood that the terms “comprises,” “including,” “has,” “contains,” and “comprising,” when used in this specification, indicate the presence of the described features, integers, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, and / or combinations thereof.

[0029] like Figures 1 to 8As shown, the present application discloses a compass with a locking mechanism, comprising a compass head 1, a first leg 2 and a second leg 3, the first leg 2 and the second leg 3 are both rotatably mounted on the compass head 1, the first leg 2 and the second leg 3 are adjusted in distance from each other by rotating to open or close relative to each other, thereby adjusting the radius of the circle to be drawn; further comprising a locking mechanism, the locking mechanism comprising a locking button 4 and a locking member 5, the compass head 1 comprises a first side wall 11 and a second side wall 12, the locking button 4 is rotatably mounted on the first side wall 11, one end of the locking member 5 is mounted on the second side wall 12, the other end of the locking member 5 is transmission-connected to the locking button 4, the locking mechanism is provided with a locking button 4 and a locking member 5 transmission-connected, the locking button 4 is used to drive the locking member 5 to tighten or loosen, the locking button 4 is rotatably mounted on the first side wall 11 of the compass head 1, and one end of the locking member 5 is mounted on the compass head 1 The locking button 4 is on the second side wall 12, and the locking member 5 cooperates with the locking member 5 to tighten the first side wall 11 and the second side wall 12, so that the first side wall 11 and the second side wall 12 cooperate to compress the head of the first leg 2 and the head of the second leg 3, so that the gap between the head of the first leg 2 and the head of the second leg 3 is squeezed to be tightly locked, and the first leg 2 and the second leg 3 are in a rotationally locked state and cannot be rotated to open and close, so as to lock the distance between the first leg 2 and the second leg 3, and the locking button 4 is rotated under force to loosen the locking member 5, and the first side wall 11 and the second side wall 12 are not subject to the tightening force, so that there is a gap between the head of the first leg 2 and the head of the second leg 3, and the first leg 2 and the second leg 3 can rotate freely, and the locking button 4 drives the locking member 5 to tighten or loosen by rotating, thereby realizing the rotation locking or unlocking of the first leg 2 and the second leg 3;

[0030] When the first leg 2 and the second leg 3 rotate relative to each other to a suitable distance, Figure 5 As shown, the user applies force to the locking button 4 to make the locking button 4 rotate relative to the compass head 1, and the locking button 4 abuts against the first side wall 11 by rotating, and the locking button 4 drives the locking member 5 to move in the direction away from the compass head 1 by rotating, and the locking member 5 is forced to squeeze the second side wall 12, and the first side wall 11 and the second side wall 12 are pressed inward by the squeezing force, so that the head of the first leg 2 and the head of the second leg 3 are locked in rotation, and the distance between the first leg 2 and the second leg 3 is locked, so as to ensure the accuracy of drawing a circle or an arc. When the distance between the first leg 2 and the second leg 3 needs to be readjusted, as shown in FIG. Figure 6As shown, the user applies force to the locking button 4 to make the locking button 4 rotate in the opposite direction relative to the compass head 1, and the locking button 4 drives the locking member 5 to move and reset in the direction of the compass head 1 by rotating in the opposite direction, and the locking member 5 no longer squeezes the second side wall 12 inwardly, and the first side wall 11 and the second side wall 12 are not reset without being squeezed, so that the head of the first leg 2 and the head of the second leg 3 are rotated and unlocked, and the distance between the first leg 2 and the second leg 3 can be readjusted. The user only needs to apply force to the locking button 4 to lock and unlock the distance between the first leg 2 and the second leg 3, which is labor-saving and convenient to use, and the locking of the first leg 2 and the second leg 3 is achieved by pressing the first side wall 11 and the second side wall 12 inwardly, and both sides of the first leg 2 and the second leg 3 can be subjected to the locking force, the force is balanced and the locking effect is good, and the locking mechanism is simple and reliable.

[0031] More specifically, Figure 5 and Figure 6 As shown, the lock button 4 is provided with a first flat surface 44 and a second flat surface 45 adapted to the first side wall 11. When the lock button 4 cooperates with the locking member 5 to tighten the first side wall 11 and the second side wall 12, the lock button 4 is positioned by abutting against the first side wall 11 through the first flat surface 44 so that the first leg 2 and the second leg 3 remain in a rotationally locked state. When the lock button 4 cooperates with the locking member 5 to loosen the first side wall 11 and the second side wall 12, the lock button 4 is positioned by abutting against the first side wall 11 through the second flat surface 45 so that the first leg 2 and the second leg 3 remain in a rotationally unlocked state. In the state, the lock button 4 drives the locking member 5 to tighten or loosen the first side wall 11 and the second side wall 12 by rotating under force. The lock button 4 is provided with a first flat surface 44 and a second flat surface 45. Both the first flat surface 44 and the second flat surface 45 are planes so as to be able to fit with the surface of the first side wall 11. The lock button 4 is rotated to switch the first flat surface 44 to fit with the first side wall 11 or the second flat surface 45 to fit with the first side wall 11, so as to achieve the purpose of stopping rotation. The first flat surface 44 and the second flat surface 45 can be provided to prevent the lock button 4 from rotating and resetting by itself.

[0032] When the first leg 2 and the second leg 3 are relatively rotated to a suitable distance, the user applies force to the locking button 4 to rotate the locking button 4 relative to the compass head 1, and the locking button 4 rotates so that the first flat surface 44 abuts against the first side wall 11, and the locking button 4 drives the locking member 5 to move away from the compass head 1 to squeeze the second side wall 12 by rotating. The first side wall 11 and the second side wall 12 are subjected to force so that the head of the first leg 2 and the head of the second leg 3 are rotationally locked, and the first flat surface 44 abuts against the first side wall 11 to stop the locking button 4 from rotating, so that the head of the first leg 2 and the head of the second leg 3 remain in a rotationally locked state, thereby ensuring the accuracy of drawing a circle or arc. When the distance between the first leg 2 and the second leg 3 needs to be readjusted When the lock button 4 is in the state of rotation, the user applies force to the lock button 4 to make the lock button 4 rotate in the opposite direction relative to the compass head 1. The lock button 4 disengages the first flat surface 44 from the first side wall 11 and abuts the second flat surface 45 against the first side wall 11 by the reverse rotation. The lock button 4 drives the locking member 5 to move in the direction of the compass head 1 to reset to loosen the second side wall 12, so that the head of the first leg 2 and the head of the second leg 3 are rotated and unlocked, and the second flat surface 45 abuts against the first side wall 11 to stop the lock button 4 from rotating, thereby keeping the head of the first leg 2 and the head of the second leg 3 in a rotationally unlocked state. By setting the first flat surface 44 and the second flat surface 45, the user does not need to keep applying force to the lock button 4 to stop the lock button 4 from rotating, which is more labor-saving to use.

[0033] More specifically, Figure 1 , Figure 3 and Figure 4 As shown, the locking member 5 is in an L-shaped structure, and the locking member 5 includes a first connecting rod 51 and a second connecting rod 52. The first connecting rod 51 is fitted with the second side wall 12, and the second connecting rod 52 is transmission-connected with the locking button 4. One end of the locking member 5 is installed on the second side wall 12, and the other end of the locking member 5 is transmission-connected with the locking button 4 installed on the first side wall 11. The locking member 5 is provided with an L-shaped structure composed of the first connecting rod 51 and the second connecting rod 52. The first connecting rod 51 is fitted with the second side wall 12, and the second connecting rod 52 passes through the channel 6 and is transmission-connected with the locking button 4. The second connecting rod 52 is driven by the force of the locking button 4 to move in a direction away from the compass head 1, and the first connecting rod 51 is forced to squeeze the second side wall 12, thereby locking the first leg 2 and the second leg 3. The locking member 5 with an L-shaped structure has a better fitting effect with the compass head 1, and the first connecting rod 51 is fitted with the surface of the second side wall 12, which has little effect on the volume of the compass.

[0034] More specifically, Figure 8As shown, the second side wall 12 is provided with a first accommodating groove 121 adapted to the first connecting rod 51, and the first connecting rod 51 is installed in the first accommodating groove 121. The surface of the first connecting rod 51 is flush with the surface of the second side wall 12, and the first connecting rod 51 is fitted with the surface of the second side wall 12 to abut against the second side wall 12. The first connecting rod 51 is accommodated by providing the first accommodating groove 121 on the second side wall 12, so that the surface of the first connecting rod 51 is flush with the surface of the second side wall 12, and the first connecting rod 51 is hidden in the first accommodating groove 121, which is beneficial to reducing the volume of the compass and reasonably distributing the space.

[0035] More specifically, Figure 4 As shown, a channel 6 for the locking member 5 to pass through is provided between the first leg 2 and the second leg 3, and the locking member 5 passes through the channel 6 to connect to the lock button 4 via the second connecting rod 52, which will not interfere with the rotation of the first leg 2 and the second leg 3 and will not affect the rotation efficiency; a first groove 21 is provided on the side of the first leg 2 close to the second leg 3, and a second groove 31 is provided on the second leg 3 to communicate with the first groove 21, and the first groove 21 and the second groove 31 are combined to form the channel 6, and the channel 6 is provided between the first leg 2 and the second leg 3 for the locking member 5 to pass through, the first groove 21 is provided on the side of the first leg 2 close to the second leg 3, and the second groove 31 is provided on the side of the second leg 3 close to the first leg 2, and the first groove 21 is communicated with the second groove 31 to form the channel 6, and the locking member 5 will not interfere with the rotation of the first leg 2 and the second leg 3 through the channel 6, and the first groove 21 and the second groove 31 have simple structures.

[0036] More specifically, Figures 1 to 3 As shown, the second connecting rod 52 is provided with a linkage shaft 521, and the locking button 4 is provided with a guide groove 41 adapted to the linkage shaft 521. The linkage shaft 521 is slidably installed in the guide groove 41. By arranging the linkage shaft 521 on the second connecting rod 52 and the guide groove 41 on the locking button 4, the linkage shaft 521 and the guide groove 41 are slidably matched to realize the transmission connection between the locking member 5 and the locking button 4. The locking button 4 is rotated under force and cooperates with the linkage shaft 521 through the guide groove 41 to drive the locking member 5 to tighten or loosen. The reliability of the locking member 5 engaging with the locking button 4 through the linkage shaft 521 is higher. The guide groove 41 is arranged in an arc shape. The guide groove 41 has a sliding guiding effect on the linkage shaft 521, so that the locking mechanism is smoother and more labor-saving to use. The linkage shaft 521 and the guide groove 41 have a simple structure and reliable matching.

[0037] More specifically, Figure 1 and Figure 3As shown, an inclined section 522 is provided between the second connecting rod 52 and the linkage shaft 521, and the inclined section 522 is inclined toward the locking button 4. The second connecting rod 52 passes through the channel 6 between the first support leg 2 and the second support leg 3 to connect to the locking button 4 through the linkage shaft 521. By providing the inclined section 522 between the second connecting rod 52 and the linkage shaft 521, the second connecting rod 52 is engaged with the linkage shaft 521 through the inclined section 522, and the inclined section 522 is inclined toward the locking button 4, so that the linkage shaft 521 is closer to the locking button 4, and the linkage shaft 521 and the locking button 4 are more compactly matched and the transmission efficiency is higher. Preferably, the inclined section 522 is arc-shaped, so that the locking button 4 and the locking member 5 are not easily interfered with each other during movement, and the transmission efficiency is higher.

[0038] More specifically, Figure 2 As shown, a mounting seat 111 adapted to the lock button 4 is provided on the first side wall 11, and the lock button 4 is provided with a first connecting shaft 42 adapted to the mounting seat 111. The end of the first connecting shaft 42 is rotatably connected to the mounting seat 111 so that the lock button 4 is rotatably connected to the first side wall 11. By providing the mounting seat 111 on the first side wall 11 and installing the first connecting shaft 42 on the end of the lock button 4, both ends of the first connecting shaft 42 are rotatably installed on the mounting seat 111, so that the lock button 4 is rotatably installed on the first side wall 11. The assembly is simple and reliable, the lock button 4 is forced to rotate around the first connecting shaft 42, and the rotation efficiency is higher.

[0039] More specifically, Figure 2 and Figure 3 As shown, a second connecting shaft 13 is installed on the compass head 1, a first through hole 22 is provided at the head of the first leg 2, a second through hole 32 is provided at the head of the second leg 3, a third through hole 53 is provided at one end of the locking member 5, and the second connecting shaft 13 passes through the first through hole 22, the second through hole 32 and the third through hole 53 and is connected with a fastener 7. By installing the second connecting shaft 13 on the compass head 1, a first through hole 22 for the second connecting shaft 13 to pass through is provided on the head of the first leg 2, a second through hole 32 for the second connecting shaft 13 to pass through is provided on the head of the second leg 3, and the locking member 5 is provided with a third through hole 53. A third through hole 53 is provided at the end of the fastener 5 for the second connecting shaft 13 to pass through. The second connecting shaft 13 passes through the first through hole 22, the second through hole 32 and the third through hole 53 to connect to the compass head 1, and the second connecting shaft 13 is limited on the compass head 1 by the fastener 7, so that the first leg 2, the second leg 3 and the locking member 5 are all limited on the compass head 1, the first leg 2, the second leg 3 and the locking member 5 cannot be separated from the compass head 1, and the first leg 2 and the second leg 3 can be rotated around the second connecting shaft 13 to open and close, thereby improving the assembly and rotation efficiency and making the overall structure more compact.

[0040] More specifically, Figure 2 , Figure 5 and Figure 6As shown, the lock button 4 is provided with an operating part 43, and the operating part 43 is inclined toward the side away from the compass head 1. The operating part 43 is subjected to force to drive the lock button 4 to rotate. The user locks and unlocks the distance between the first leg 2 and the second leg 3 by applying force to the lock button 4. By arranging the operating part 43 on the lock button 4, the operating part 43 is inclined toward the side away from the compass head 1, that is, the operating part 43 is inclined outward, and the distance between the operating part 43 and the compass head 1 is greater than the distance between the lock button 4 body and the compass head 1. The operating part 43 is more prominent, which is convenient for the user to apply force. The user can rotate the lock button 4 by applying force on the operating part 43. The operating part 43 conforms to the ergonomic design, and the operation is more labor-saving and comfortable.

[0041] More specifically, Figure 2 and Figure 7 As shown, a dividing plate 8 is installed between the head of the first leg 2 and the head of the second leg 3, and the dividing plate 8 is provided with a second accommodating groove 81. The head of the first leg 2 is provided with a first rotating protrusion 23 adapted to the second accommodating groove 81, and the head of the second leg 3 is provided with a second rotating protrusion 33 adapted to the second accommodating groove 81. The first rotating protrusion 23 and the second rotating protrusion 33 are both rotatably inserted in the second accommodating groove 81. The first leg 2 and the second leg 3 are linked and matched through the dividing plate 8. The dividing plate 8 is installed between the first leg 2 and the second leg 3. The dividing plate 8 is used to link the first leg 2 and the second leg 3, so that the rotation efficiency of the first leg 2 and the second leg 3 is higher. By setting the second accommodating groove 81 on the dividing plate 8, setting the first rotating protrusion 23 at the head of the first leg 2, and setting the second rotating protrusion 33 at the head of the second leg 3, the first rotating protrusion 23 and the second rotating protrusion 33 are respectively inserted at the two ends of the second accommodating groove 81, and the first rotating protrusion 23, the second rotating protrusion 33 and the second accommodating groove 81 cooperate to realize the linkage of the first leg 2 and the second leg 3, thereby improving the rotation and locking efficiency.

[0042] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A compass with a locking mechanism, comprising a compass head (1), a first leg (2) and a second leg (3), wherein the first leg (2) and the second leg (3) are both rotatably mounted on the compass head (1), characterized in that: The compass head (1) further comprises a locking mechanism, the locking mechanism comprising a locking button (4) and a locking member (5); the compass head (1) comprises a first side wall (11) and a second side wall (12); the locking button (4) is rotatably mounted on the first side wall (11); one end of the locking member (5) is mounted on the second side wall (12); the other end of the locking member (5) is transmission-connected to the locking button (4); the locking member (5) cooperates with the locking button (4) to tighten the first side wall (11) and the second side wall (12) so that the first leg (2) and the second leg (3) are rotationally locked or to loosen the first side wall (11) and the second side wall (12) so that the first leg (2) and the second leg (3) are rotationally unlocked.

2. A compass with a locking mechanism according to claim 1, characterized in that: The lock button (4) is provided with a first flat surface and a second flat surface adapted to the first side wall (11); when the lock button (4) cooperates with the locking member (5) to tighten the first side wall (11) and the second side wall (12), the lock button (4) is positioned in contact with the first side wall (11) through the first flat surface (44) so ​​that the first leg (2) and the second leg (3) are kept in a rotationally locked state; when the lock button (4) cooperates with the locking member (5) to loosen the first side wall (11) and the second side wall (12), the lock button (4) is positioned in contact with the first side wall (11) through the second flat surface (45) so that the first leg (2) and the second leg (3) are kept in a rotationally unlocked state.

3. A compass with a locking mechanism according to claim 1 or 2, characterized in that: The locking member (5) is of an L-shaped structure and comprises a first connecting rod (51) and a second connecting rod (52). The first connecting rod (51) is in contact with the second side wall (12), and the second connecting rod (52) is in transmission connection with the locking button (4).

4. A compass with a locking mechanism according to claim 3, characterized in that: The second side wall (12) is provided with a first accommodating groove (121) adapted to the first connecting rod (51), the first connecting rod (51) is installed in the first accommodating groove (121), and the surface of the first connecting rod (51) is flush with the surface of the second side wall (12).

5. A compass with a locking mechanism according to claim 1, characterized in that: A passage (6) for the locking member (5) to pass through is provided between the first leg (2) and the second leg (3); a first groove (21) is provided on a side of the first leg (2) close to the second leg (3); the second leg (3) is provided with a second groove (31) connected to the first groove (21); the first groove (21) and the second groove (31) are combined to form the passage (6).

6. A compass with a locking mechanism according to claim 3, characterized in that: The second connecting rod (52) is provided with a linkage shaft (521), the locking button (4) is provided with a guide groove (41) adapted to the linkage shaft (521), and the linkage shaft (521) is slidably installed in the guide groove (41).

7. A compass with a locking mechanism according to claim 6, characterized in that: An inclined section (522) is provided between the second connecting rod (52) and the linkage shaft (521), and the inclined section (522) is inclined toward the locking button (4).

8. A compass with a locking mechanism according to claim 1, characterized in that: The first side wall (11) is provided with a mounting seat (111) adapted to the locking button (4), and the locking button (4) is provided with a first connecting shaft (42) adapted to the mounting seat (111), and an end of the first connecting shaft (42) is rotatably connected to the mounting seat (111) so that the locking button (4) is rotatably connected to the first side wall (11).

9. A compass with a locking mechanism according to claim 1, characterized in that: A second connecting shaft (13) is installed on the compass head (1); a first through hole (22) is provided at the head of the first support leg (2); a second through hole (32) is provided at the head of the second support leg (3); a third through hole (53) is provided at one end of the locking member (5); and the second connecting shaft (13) passes through the first through hole (22), the second through hole (32) and the third through hole (53) and is connected to a fastener (7).

10. A compass with a locking mechanism according to claim 1, characterized in that: The locking button (4) is provided with an operating portion (43), the operating portion (43) is inclined toward a side away from the compass head (1), and the operating portion (43) is subjected to force to drive the locking button (4) to rotate.

11. A compass with a locking mechanism according to claim 1, characterized in that: A dividing plate (8) is installed between the head of the first supporting leg (2) and the head of the second supporting leg (3); the dividing plate (8) is provided with a second accommodating groove (81); the head of the first supporting leg (2) is provided with a first rotating protrusion (23) adapted to the second accommodating groove (81); the head of the second supporting leg (3) is provided with a second rotating protrusion (33) adapted to the second accommodating groove (81); the first rotating protrusion (23) and the second rotating protrusion (33) are both rotatably inserted in the second accommodating groove (81); the first supporting leg (2) and the second supporting leg (3) are linked and matched through the dividing plate (8).

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