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 head of the first support leg and the head of the second support leg are rotatably matched to form a hinge part, the compass further comprises a locking mechanism, the locking mechanism comprises a lock knob and a pressing part, and the locking part is arranged on the lock knob. The pressing piece is installed on the compass head in a sliding mode, the lock knob is installed on the compass head and is in transmission connection with the pressing piece, the lock knob is stressed to rotate so as to drive the pressing piece to slide relative to the compass head, and one end of the pressing piece is provided with a protruding portion matched with the hinge portion. The pressing piece slides to enable the protruding portion to abut against or be separated from the hinge portion, a user only needs to apply force to the lock knob to achieve locking and unlocking of the distance between the first supporting foot and the second supporting foot, use is labor-saving and convenient, the locking mechanism is only composed of the lock knob and the pressing piece, the structure is simple, and installation is labor-saving and convenient.

Description

Technical Field

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

[0002] A compass is a tool used to draw circles and arcs. It generally includes two legs and a compass head. The two legs are rotatably mounted on the compass head. A needle tip is provided at the end of one of the legs for locating the center of the circle, and a lead is provided on the other leg for drawing circles or arcs. When using a compass, the two legs need to be opened to the required distance, which is the radius of the circle. Since both legs are rotatably connected to the compass head, the legs are easily displaced by finger touch or other factors during the drawing process, changing the distance between the two legs, affecting the accuracy of the drawn circle or arc, and thus causing drawing failure.

[0003] In response to the above problems, a utility model patent with publication number: CN213920457U discloses a push-type locking compass, including a compass head, a pin, a lead foot, a positioning member installed in the compass head, a locking mechanism and a telescopic spring, the positioning member includes a straight section that slides up and down and a large head connected to the straight section, the first ends of the pin and the lead foot are respectively equipped with rotating members, and the two rotating members are respectively rotatably installed on the large head, the locking mechanism includes a pushing member and a deforming member that is tightened and deformed inwardly under the extrusion fit of the pushing member, the pushing member is connected to a pressing member, the pressing member and the pushing member are respectively slidably installed outside the straight section, the deforming member is sleeved outside the large head, and the two rotating members are both located inside the deforming member; the telescopic spring is sleeved outside the straight section, the telescopic spring is tensioned between the pressing member and the deforming member, and the pushing member is positioned at the compass head through a clamping structure. In this technical solution, when the pin and the lead foot are opened to the desired angles respectively by the rotation of the corresponding rotating parts, the pressing part is pressed downward to drive the pushing part to press the deforming part downward so that the deforming part is tightened inward and deformed inward, so that the telescopic spring is compressed, and at the same time, the deforming part holds the two rotating parts tightly so that the two rotating parts cannot rotate, thereby limiting the movement of the pin and the lead foot. Then, the pushing part is positioned by a clamping structure to avoid the compressed telescopic spring from resetting, thereby achieving the purpose of locking the distance between the pin and the lead foot. However, this compass has problems such as complex structure of the locking mechanism, high production precision requirements, and complicated assembly. 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 simple locking mechanism structure, labor-saving and convenient assembly, 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, the head of the first leg and the head of the second leg are rotatably matched to form a hinged portion, and also includes a locking mechanism, the locking mechanism comprises a locking button and a clamping piece, the clamping piece is slidably mounted on the compass head, the locking button is mounted on the compass head and the locking button is transmission-connected to the clamping piece, the locking button is forced to drive the clamping piece to slide relative to the compass head, one end of the clamping piece is provided with a convex portion adapted to the hinged portion, the clamping piece slides back and forth so that the convex portion abuts against the hinged portion to lock the hinged portion rotationally or disengage and unlock the hinged portion rotationally.

[0006] In the technical scheme, the head of the first leg and the head of the second leg are arranged to rotatably cooperate to form a hinged portion, and the hinged portion is rotatably mounted on the compass head, and the first leg and the second leg are relatively opened or closed by rotating, and the first leg and the second leg are adjusted to have a distance between each other by rotating to open and close, thereby adjusting the radius of the circle to be drawn, and a locking mechanism is arranged to cooperate with the inner wall of the mounting seat through a pressing piece to press the hinged portion, so that the gap between the head of the first leg and the head of the second leg is squeezed to be tightly locked, 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 achieve the purpose of locking the distance between the first leg and the second leg, and a pressing piece is arranged to press the hinged portion through a convex portion, and the convex portion has a simple structure and a better pressing effect, and a pressing piece is arranged to make the convex portion abut against or disengage from the hinged portion by sliding, and the sliding locking and unlocking method is simple and labor-saving, and a locking button is arranged in the locking mechanism to be transmission-connected with the pressing piece, and the locking button is subjected to force to drive the pressing piece to slide, thereby realizing the rotational locking or When the first leg and the second leg are relatively rotated to a suitable distance, the user applies force to the lock button to make the lock button drive the pressing piece to slide, and the pressing piece makes the convex part abut against the hinge part by sliding, and the head of the first leg and the head of the second leg are rotated and locked by the pressing force between the convex part and the inner wall of the compass head, 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 lock button to make the lock button drive the pressing piece to slide in the opposite direction, and the pressing piece makes the convex part disengage from the hinge part by sliding in the opposite direction, and the head of the first leg and the head of the second leg are not subject to the pressing force between the convex part and the inner wall of the compass head and 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. It is labor-saving and convenient to use, and the locking mechanism is only composed of the lock button and the pressing piece. The locking mechanism of this scheme has a simple structure and is labor-saving and convenient to install.

[0007] As an improvement, a first rotating shaft is installed on the compass head, a first through hole is provided on the head of the first leg for the first rotating shaft to pass through, a second through hole is provided on the head of the second leg for the first rotating shaft to pass through, and the first leg and the second leg are both limited on the compass head by the first rotating shaft. In this technical solution, the head of the first leg and the head of the second leg are both rotatably installed on the compass head, by installing the first rotating shaft on the compass head, a first through hole is provided on the head of the first leg, and a second through hole is provided on the head of the second leg, the first rotating shaft passes through the first through hole and the second through hole to connect the compass head, so that the first leg and the second leg can be limited on the compass head, the first leg and the second leg cannot be separated from the compass head, and the first leg and the second leg can be opened and closed around the first rotating shaft, thereby improving the assembly and rotation efficiency.

[0008] As an improvement, the clamping member is provided with a first slide groove adapted to the first rotating shaft, and the first rotating shaft passes through the first slide groove and slidably cooperates with the first slide groove. In this technical solution, the clamping member is slidably installed on the compass head, and the first leg and the second leg are limited on the compass head by the first rotating shaft. The clamping member will interfere with the first rotating shaft during the sliding process. By providing a first slide groove on the clamping member for the first rotating shaft to pass through, the first rotating shaft passes through the first slide groove, the first through hole and the second through hole to connect the compass head, thereby limiting the clamping member, the first leg and the second leg to the compass head. The installation is simple and reliable. The clamping member avoids the first rotating shaft through the first slide groove during the sliding process. The first slide groove and the first rotating shaft slidably cooperate to have a sliding guide effect on the clamping member, thereby improving the sliding efficiency.

[0009] As an improvement, the locking button is rotatably mounted on the compass head; the locking button is provided with a transmission rod, the clamping member is provided with a first receiving groove adapted to the transmission rod, the end of the transmission rod is rotationally matched with the first receiving groove, the locking button is subjected to force to drive the transmission rod to rotate, and the transmission rod drives the clamping member to slide by rotating in the first receiving groove. In this technical solution, the locking button is rotatably mounted on the compass head, and the locking button is subjected to force to drive the clamping member to slide by rotating, thereby realizing the rotation locking or unlocking of the first leg and the second leg; the locking button is connected to the clamping member by transmission, by arranging the transmission rod on the locking button and the first receiving groove on the clamping member, the end of the transmission rod is inserted into the first receiving groove, the end of the transmission rod can rotate in the first receiving groove, the end of the transmission rod is set as an arc surface, and the transmission rod abuts against the first receiving groove through the arc surface during the rotation process, thereby improving the rotation efficiency, the locking button is subjected to force to drive the transmission rod to rotate, and the transmission rod abuts against the first receiving groove through its end to drive the clamping member to slide, the transmission structure is simple and reliable, and the transmission efficiency is high.

[0010] 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 applies force to the lock button to achieve locking and unlocking of the distance between the first leg and the second leg. By setting the operating part at the end of the lock button away from the transmission rod, 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 to operate. 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.

[0011] As an improvement, the compass head is provided with a mounting seat adapted to the locking button, and the locking button is provided with a second rotating shaft adapted to the mounting seat, and the end of the second rotating shaft is rotatably connected to the mounting seat so that the locking button is rotatably connected to the mounting seat. In this technical solution, by providing a mounting seat on the compass head and installing the second rotating shaft on the end of the locking button, the two ends of the second rotating shaft are installed on the mounting seat, so that the locking button is rotatably installed on the compass head, the assembly is simple and reliable, the locking button is forced to rotate around the second rotating shaft, and the rotation efficiency is higher, and the second rotating shaft is installed on the end of the locking button close to the transmission rod, the second rotating shaft and the transmission rod are on the same plane, the second rotating shaft is a lever fulcrum, the transmission loss is small, the transmission efficiency is higher, and the user is more labor-saving.

[0012] 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 first rotating protrusion, the second rotating protrusion and the second receiving groove, so as to improve the rotation and locking efficiency.

[0013] As an improvement, the clamping member is installed on the side where the head of the first leg is located, and the outer edge of the head of the first leg is provided with a first guide surface adapted to the convex portion. In this technical solution, the head of the first leg and the head of the second leg are rotatably matched to form a hinged portion, and the clamping member realizes rotational locking of the first leg and the second leg by abutting the hinged portion with the convex portion, and realizes rotational unlocking of the first leg and the second leg by disengaging the convex portion from the hinged portion. The clamping member is installed on the side where the head of the first leg is located, that is, the convex portion abuts or disengages from the head of the first leg by sliding, and a first guide surface is provided on the outer edge of the head of the first leg. The first guide surface has a sliding guiding effect on the convex portion, thereby improving the sliding efficiency. When the first leg and the second leg are relatively rotated to a suitable distance, the user applies force to the lock button to make the lock button rotate relative to the compass head, and the lock button drives the clamping member to slide by rotating, and the clamping member drives the convex portion to slide to the first The guide surface is in contact with the head of the first leg, and the head of the first leg and the head of the second leg are rotated and locked by the compression force between the convex portion and the inner wall of the compass head. 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 rotate the locking button in the opposite direction relative to the compass head. The locking button drives the clamping piece to slide in the opposite direction by rotating in the opposite direction. The clamping piece drives the convex portion to slide in the opposite direction along the first guide surface until it is separated from the head of the first leg, so that the head of the first leg and the head of the second leg are not subject to the compression force of the convex portion, and the first leg and the second leg can both rotate. The sliding efficiency can be improved by the first guide surface, and the structure is more compact.

[0014] As an improvement, the clamping piece is installed on the side where the head of the second leg is located, and the outer edge of the head of the second leg is provided with a second guide surface that is adapted to the convex portion. The technical solution can also provide another installation position of the clamping piece, and the clamping piece is installed on the side where the head of the second leg is located, that is, the convex portion abuts against or disengages from the head of the second leg by sliding, and a second guide surface is provided on the outer edge of the head of the second leg, and the second guide surface has a sliding guiding effect on the convex portion, thereby improving the sliding efficiency. When the first leg and the second leg are relatively rotated to a suitable distance, the user applies force to the locking button to rotate the locking button relative to the compass head, and the locking button drives the clamping piece to slide by rotating, and the clamping piece drives the convex portion to slide to the second guide surface to abut against the head of the second leg, and the heads of the first leg and the second leg are guided by the convex portion and the compass head. The compass head is locked by the pressing force between the inner walls of the compass head, and the distance between the first leg and the second leg is locked, thereby ensuring the accuracy of drawing a circle or an 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 pressing piece to slide in the opposite direction by rotating in the opposite direction, and the pressing piece drives the convex portion to slide in the opposite direction along the second guide surface until it is separated from the head of the second leg, so that the head of the first leg and the head of the second leg are not affected by the pressing force of the convex portion, and both the first leg and the second leg can rotate. The sliding efficiency can be improved by the second guide surface, and the structure is more compact.

[0015] As an improvement, the compass head is provided with a second slide groove adapted to the clamping piece, the clamping piece is slidably installed in the second slide groove, and the surface of the convex part protrudes relative to the inner wall of the compass head. In this technical solution, the clamping piece is slidably installed in the compass head, and a second slide groove capable of accommodating the clamping piece is provided on the inner wall of the compass head. The clamping piece is forced to slide back and forth in the second slide groove, and the second slide groove has a sliding guide function, which not only makes the assembly of the clamping piece simple and reliable, but also helps to improve the sliding efficiency of the clamping piece. When the clamping piece is installed in the second slide groove, the surface of the clamping piece body is lower than the surface of the inner wall of the compass head or is flush with the surface of the inner wall of the compass head. The convex part of the clamping piece protrudes compared to the surface of the inner wall of the compass head, and the convex part can directly act on the hinge part, so the overall structure is more compact and the space utilization rate is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a compass with a locking mechanism according to the present application.

[0017] Figure 2 This is a schematic diagram of the exploded structure of a compass with a locking mechanism according to the present application.

[0018] Figure 3 It is a schematic diagram of the partial structure of the compass in the present application in the rotationally locked state.

[0019] Figure 4This is a schematic diagram of the partial structure of the compass in the present application when it is rotated and unlocked.

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the compass in the present application when it is in a rotationally locked state.

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the compass in the present application when it is rotated and unlocked.

[0022] Figure 7 This is an exploded schematic diagram of the first leg, the dividing plate and the second leg in this application.

[0023] Figure 8 This is an exploded schematic diagram of the first leg, the dividing plate and the second leg in this application from another angle.

[0024] Fig. 9 It is a schematic diagram of the three-dimensional structure of the compass head in this application.

[0025] As shown in the figure: 1. compass head; 11. first rotating shaft; 12. mounting seat; 13. second slide groove; 2. first support leg; 21. first through hole; 22. first rotating protrusion; 23. first guide surface; 3. second support leg; 31. second through hole; 32. second rotating protrusion; 33. second guide surface; 4. hinge part; 5. locking mechanism; 51. locking button; 511. transmission rod; 512. operating part; 52. pressing member; 521. protrusion; 522. first slide groove; 523. first accommodating groove; 53. second rotating shaft; 6. dividing plate; 61. 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] Example 1

[0030] like Figures 1 to 9As shown, the present application discloses a compass with a locking mechanism, including 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 head of the first leg 2 and the head of the second leg 3 are rotatably matched to form a hinged portion 4, and the hinged portion 4 is rotatably mounted on the compass head 1. The first leg 2 and the second leg 3 are relatively opened or closed by rotation, and the first leg 2 and the second leg 3 are adjusted in distance from each other by rotating to open and close, thereby adjusting the radius of the circle to be drawn; it also includes a locking mechanism 5, the locking mechanism 5 includes a locking button 51 and a pressing member 52, the pressing member 52 is slidably mounted on the compass head 1, the locking button 51 is mounted on the compass head 1 and the locking button 51 is transmission-connected to the pressing member 52, the locking button 51 is forced to drive the pressing member 52 to slide relative to the compass head 1, one end of the pressing member 52 is provided with a convex portion 521 adapted to the hinged portion 4, and the pressing member 52 is pressed by sliding back and forth The protrusion 521 is in contact with the hinge part 4 to lock the hinge part 4 in rotation or the protrusion 521 is disengaged from the hinge part 4 to unlock the hinge part 4 in rotation. The locking mechanism 5 cooperates with the inner wall of the mounting seat 12 through the pressing piece 52 to press the hinge part 4, 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 achieve locking the distance between the first leg 2 and the second leg 3. The pressing piece 52 is set to press the hinge part 4 through the protrusion 521. The protrusion 521 has a simple structure and a better pressing effect. The pressing piece 52 is set to make the protrusion 521 abut against or disengage from the hinge part 4 by sliding. The sliding locking and unlocking method is simple and labor-saving. The locking mechanism 5 is provided with a lock button 51 and the pressing piece 52 are transmission-connected. The lock button 51 is driven by the force to drive the pressing piece 52 to slide, thereby achieving the first leg 2 and the second leg 3 rotation locking or unlocking;

[0031] When the first leg 2 and the second leg 3 are relatively rotated to a suitable distance, the user applies force to the lock button 51 so that the lock button 51 drives the pressing member 52 to slide, and the pressing member 52 slides to make the protrusion 521 abut against the hinged portion 4, and the head of the first leg 2 and the head of the second leg 3 are rotated and locked by the pressing force between the protrusion 521 and the inner wall of the compass head 1, and the distance between the first leg 2 and the second leg 3 is locked, 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, the user applies force to the lock button 51 so that the lock button 51 drives the pressing member 52 to slide. The dynamic clamping member 52 slides in the opposite direction, and the clamping member 52 disengages the protrusion 521 from the hinged portion 4 by sliding in the opposite direction. The head of the first leg 2 and the head of the second leg 3 are not subject to the clamping force between the protrusion 521 and the inner wall of the compass head 1 and are rotated and unlocked. 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 51 to lock and unlock the distance between the first leg 2 and the second leg 3. It is labor-saving and convenient to use. The locking mechanism 5 is only composed of the locking button 51 and the clamping member 52. The locking mechanism 5 of this scheme has a simple structure and is labor-saving and convenient to install.

[0032] More specifically, Figures 5 to 7 As shown, a first rotating shaft 11 is installed on the compass head 1, a first through hole 21 for the first rotating shaft 11 to pass through is provided at the head of the first leg 2, and a second through hole 31 for the first rotating shaft 11 to pass through is provided at the head of the second leg 3, the first leg 2 and the second leg 3 are both limited on the compass head 1 by the first rotating shaft 11, and the heads of the first leg 2 and the second leg 3 are both rotatably installed on the compass head 1, by installing the first rotating shaft 11 on the compass head 1, a first through hole 21 is provided on the head of the first leg 2, and a second through hole 31 is provided on the head of the second leg 3, the first rotating shaft 11 passes through the first through hole 21 and the second through hole 31 to connect the compass head 1, so that the first leg 2 and the second leg 3 can be limited on the compass head 1, the first leg 2 and the second leg 3 cannot be separated from the compass head 1, and the first leg 2 and the second leg 3 can be opened and closed around the first rotating shaft 11, thereby improving the assembly and rotation efficiency.

[0033] More specifically, Figures 3 to 6As shown, the clamping piece 52 is provided with a first slide groove 522 adapted to the first rotating shaft 11, the first rotating shaft 11 passes through the first slide groove 522 and slidably cooperates with the first slide groove 522, the clamping piece 52 is slidably installed on the compass head 1, the first leg 2 and the second leg 3 are limited on the compass head 1 by the first rotating shaft 11, and the clamping piece 52 will interfere with the first rotating shaft 11 during the sliding process. By providing the first slide groove 522 on the clamping piece 52 for the first rotating shaft 11 to pass through, the first rotating shaft 11 passes through the first slide groove 522, the first through hole 21 and the second through hole 31 to connect the compass head 1, so that the clamping piece 52, the first leg 2 and the second leg 3 are all limited on the compass head 1, the installation is simple and reliable, the clamping piece 52 avoids the first rotating shaft 11 through the first slide groove 522 during the sliding process, and the first slide groove 522 and the first rotating shaft 11 slidably cooperate to have a sliding guiding effect on the clamping piece 52, thereby improving the sliding efficiency.

[0034] More specifically, Figure 2 , Figures 4 to 6 As shown, the lock button 51 is rotatably mounted on the compass head 1, and the lock button 51 is rotatably mounted on the compass head 1. The lock button 51 is subjected to force to drive the pressing member 52 to slide by rotation, thereby realizing the rotation locking or unlocking of the first leg 2 and the second leg 3; the lock button 51 is provided with a transmission rod 511, and the pressing member 52 is provided with a first accommodating groove 523 adapted to the transmission rod 511. The end of the transmission rod 511 is rotatably matched with the first accommodating groove 523. The lock button 51 is subjected to force to drive the transmission rod 511 to rotate, and the transmission rod 511 drives the pressing member 52 to slide by rotating in the first accommodating groove 523. The lock button 51 and the pressing member 52 are transmitted The connection is achieved by arranging a transmission rod 511 on the lock button 51 and a first receiving groove 523 on the clamping member 52. The end of the transmission rod 511 is inserted into the first receiving groove 523. The end of the transmission rod 511 is rotatable in the first receiving groove 523. The end of the transmission rod 511 is arranged as an arc surface. During the rotation of the transmission rod 511, the arc surface abuts against the first receiving groove 523 to improve the rotation efficiency. The lock button 51 is subjected to force to drive the transmission rod 511 to rotate. The transmission rod 511 abuts against the first receiving groove 523 through its end to drive the clamping member 52 to slide. The transmission structure is simple and reliable, and the transmission efficiency is high.

[0035] More specifically, Figure 5 and Figure 6As shown, the lock button 51 is provided with an operating part 512, and the operating part 512 is inclined toward the side away from the compass head 1. The operating part 512 is subjected to force to drive the lock button 51 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 51. The operating part 512 is set at the end of the lock button 51 away from the transmission rod 511, and the operating part 512 is inclined toward the side away from the compass head 1, that is, the operating part 512 is inclined outwardly. The distance between the operating part 512 and the compass head 1 is greater than the distance between the lock button 51 body and the compass head 1. The operating part 512 is more prominent, which is convenient for the user to apply force. The user can rotate the lock button 51 by applying force to the operating part 512. The operating part 512 conforms to ergonomic design, and is more labor-saving and comfortable to operate.

[0036] More specifically, Figure 2 As shown, the compass head 1 is provided with a mounting seat 12 adapted to the locking button 51, and the locking button 51 is provided with a second rotating shaft 53 adapted to the mounting seat 12. The end of the second rotating shaft 53 is rotatably connected to the mounting seat 12 so that the locking button 51 is rotatably connected to the mounting seat 12. By arranging the mounting seat 12 on the compass head 1 and installing the second rotating shaft 53 on the end of the locking button 51, both ends of the second rotating shaft 53 are installed on the mounting seat 12, so that the locking button 51 is rotatably installed on the compass head 1, and the assembly is simple and reliable. The locking button 51 is forced to rotate around the second rotating shaft 53, and the rotation efficiency is higher. The second rotating shaft 53 is arranged to be installed on the end of the locking button 51 close to the transmission rod 511, and the second rotating shaft 53 and the transmission rod 511 are on the same plane. The second rotating shaft 53 is a lever fulcrum, and the transmission loss is small, the transmission efficiency is higher, and the user is more labor-saving to use.

[0037] More specifically, Figure 7 and Figure 8 As shown, a dividing plate 6 is installed between the head of the first leg 2 and the head of the second leg 3, and the dividing plate 6 is provided with a second accommodating groove 61. The head of the first leg 2 is provided with a first rotating protrusion 22 adapted to the second accommodating groove 61, and the head of the second leg 3 is provided with a second rotating protrusion 32 adapted to the second accommodating groove 61. The first rotating protrusion 22 and the second rotating protrusion 32 are both rotatably inserted in the second accommodating groove 61. The first leg 2 and the second leg 3 are linked and matched through the dividing plate 6. The dividing plate 6 is installed between the first leg 2 and the second leg 3. The dividing plate 6 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 61 on the dividing plate 6, setting the first rotating protrusion 22 on the head of the first leg 2, and setting the second rotating protrusion 32 on the head of the second leg 3, the first rotating protrusion 22 and the second rotating protrusion 32 are respectively inserted at the two ends of the second accommodating groove 61, and the first rotating protrusion 22, the second rotating protrusion 32 and the second accommodating groove 61 cooperate to realize the linkage of the first leg 2 and the second leg 3, thereby improving the rotation and locking efficiency.

[0038] More specifically, Fig. 9 As shown, the compass head 1 is provided with a second slide groove 13 adapted to the clamping piece 52, and the clamping piece 52 is slidably installed in the second slide groove 13, and the surface of the convex portion 521 protrudes relative to the inner wall of the compass head 1, and the clamping piece 52 is slidably installed in the compass head 1. By arranging the second slide groove 13 that can accommodate the clamping piece 52 on the inner wall of the compass head 1, the clamping piece 52 is forced to slide back and forth in the second slide groove 13, and the second slide groove 13 has a sliding guide function, which not only makes the assembly of the clamping piece 52 simple and reliable, but also helps to improve the sliding efficiency of the clamping piece 52. When the clamping piece 52 is installed in the second slide groove 13, the surface of the clamping piece 52 body is lower than the surface of the inner wall of the compass head 1 or is flush with the surface of the inner wall of the compass head 1, and the convex portion 521 of the clamping piece 52 protrudes compared with the surface of the inner wall of the compass head 1, and the convex portion 521 can directly act on the hinged portion 4, and the overall structure is more compact and the space utilization rate is higher.

[0039] It should be noted that in this embodiment, the first leg 2 is a leg provided with a lead core, and the second leg 3 is a leg provided with a needle tip, or the first leg 2 can also be a leg provided with a needle tip, and the second leg 3 is a leg provided with a lead core, and this embodiment is not limited to this.

[0040] Example 2

[0041] like Figures 1 to 9 As shown, this embodiment provides a compass with a locking mechanism based on the embodiment 1, and the compass structure is the same as that of the embodiment 1, wherein the pressing member 52 is installed on the side where the head of the first leg 2 is located, and the outer edge of the head of the first leg 2 is provided with a first guide surface 23 adapted to the convex portion 521. When the pressing member 52 is forced to slide and unlock, the convex portion 521 slides along the first guide surface 23 to disengage from the hinge portion 4, and the head of the first leg 2 and the head of the second leg 3 rotate to cooperate to form the hinge portion 4, and the pressing member 52 abuts against the hinge portion 4 through the convex portion 521 to achieve rotational locking of the first leg 2 and the second leg 3, and the pressing member 52 disengages from the hinge portion 4 through the convex portion 521 to achieve rotational unlocking of the first leg 2 and the second leg 3, and the pressing member 52 is installed on the side where the head of the first leg 2 is located, that is, the convex portion 521 abuts against or disengages from the head of the first leg 2 by sliding, and the first guide surface 23 is provided on the outer edge of the head of the first leg 2;

[0042] 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 51 to make the locking button 51 rotate relative to the compass head 1, and the locking button 51 drives the pressing member 52 to slide by rotating, and the pressing member 52 drives the protrusion 521 to slide to the first guide surface 23 to abut against the head of the first leg 2, and the head of the first leg 2 and the head of the second leg 3 are rotated and locked by the pressing force between the protrusion 521 and the inner wall of the compass head 1, and the distance between the first leg 2 and the second leg 3 is locked, thereby ensuring the accuracy of drawing a circle or an arc. When the distance between the support leg 2 and the second support leg 3 needs to be readjusted, the user applies force to the locking button 51 to make the locking button 51 rotate in the opposite direction relative to the compass head 1. The locking button 51 drives the clamping member 52 to slide in the opposite direction by rotating in the opposite direction. The clamping member 52 drives the protrusion 521 to slide in the opposite direction along the first guide surface 23 until it is separated from the head of the first support leg 2, so that the head of the first support leg 2 and the head of the second support leg 3 are not affected by the clamping force of the protrusion 521. The first support leg 2 and the second support leg 3 can both rotate. The sliding efficiency can be improved through the first guide surface 23, and the structure is more compact.

[0043] Example 3

[0044] like Figures 1 to 9 As shown, this embodiment provides a compass with a locking mechanism based on Embodiment 1, and the compass structure is the same as that of Embodiment 1, wherein the pressing member 52 is installed on the side where the head of the second leg 3 is located, and the outer edge of the head of the second leg 3 is provided with a second guide surface 33 adapted to the convex portion 521. When the pressing member 52 is forced to slide and unlock, the convex portion 521 slides along the second guide surface 33 to disengage from the hinge portion 4, and the head of the first leg 2 and the head of the second leg 3 rotate and cooperate to form the hinge portion 4, and the pressing member 52 abuts against the hinge portion 4 through the convex portion 521 to achieve rotational locking of the first leg 2 and the second leg 3, and the pressing member 52 disengages from the hinge portion 4 through the convex portion 521 to achieve rotational unlocking of the first leg 2 and the second leg 3, and the pressing member 52 is installed on the side where the head of the second leg 3 is located, that is, the convex portion 521 abuts against or disengages from the head of the second leg 3 by sliding, and a second guide surface 33 capable of avoiding the convex portion 521 is provided on the outer edge of the head of the second leg 3;

[0045] 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 51 to make the locking button 51 rotate relative to the compass head 1, and the locking button 51 drives the pressing member 52 to slide by rotating, and the pressing member 52 drives the protrusion 521 to slide to the second guide surface 33 to abut against the head of the second leg 3. The head of the first leg 2 and the head of the second leg 3 are rotated and locked by the pressing force between the protrusion 521 and the inner wall of the compass head 1, and the distance between the first leg 2 and the second leg 3 is locked, thereby ensuring the accuracy of drawing a circle or an arc. When the distance between the support leg 2 and the second support leg 3 needs to be readjusted, the user applies force to the locking button 51 to make the locking button 51 rotate in the opposite direction relative to the compass head 1. The locking button 51 drives the clamping member 52 to slide in the opposite direction by rotating in the opposite direction. The clamping member 52 drives the protrusion 521 to slide in the opposite direction along the second guide surface 33 until it is separated from the head of the second support leg 3, so that the head of the first support leg 2 and the head of the second support leg 3 are not affected by the clamping force of the protrusion 521. The first support leg 2 and the second support leg 3 can both rotate. The sliding efficiency can be improved through the second guide surface 33, and the structure is more compact.

[0046] 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), and the head of the first leg (2) and the head of the second leg (3) are rotatably matched to form a hinged portion (4), characterized in that: The invention also comprises a locking mechanism (5), the locking mechanism (5) comprising a locking button (51) and a pressing piece (52), the pressing piece (52) being slidably mounted on the compass head (1), the locking button (51) being mounted on the compass head (1) and being transmission-connected with the pressing piece (52), the locking button (51) being driven by a force to drive the pressing piece (52) to slide relative to the compass head (1), one end of the pressing piece (52) being provided with a convex portion (521) adapted to the hinged portion (4), the pressing piece (52) sliding back and forth causes the convex portion (521) to abut against the hinged portion (4) to lock the hinged portion (4) rotationally, or disengages from the convex portion (521) to unlock the hinged portion (4) rotationally.

2. A compass with a locking mechanism according to claim 1, characterized in that: A first rotating shaft (11) is mounted on the compass head (1); a first through hole (21) is provided at the head of the first support leg (2) for the first rotating shaft (11) to pass through; a second through hole (31) is provided at the head of the second support leg (3) for the first rotating shaft (11) to pass through; and both the first support leg (2) and the second support leg (3) are limited on the compass head (1) by the first rotating shaft (11).

3. A compass with a locking mechanism according to claim 2, characterized in that: The pressing member (52) is provided with a first sliding groove (522) adapted to the first rotating shaft (11); the first rotating shaft (11) passes through the first sliding groove (522) and is slidably matched with the first sliding groove (522).

4. A compass with a locking mechanism according to claim 1, characterized in that: The locking button (51) is rotatably mounted on the compass head (1); the locking button (51) is provided with a transmission rod (511); the pressing piece (52) is provided with a first receiving groove (523) adapted to the transmission rod (511); the end of the transmission rod (511) is rotatably matched with the first receiving groove (523); the locking button (51) is subjected to force to drive the transmission rod (511) to rotate; the transmission rod (511) rotates in the first receiving groove (523) to drive the pressing piece (52) to slide.

5. A compass with a locking mechanism according to claim 4, characterized in that: The locking button (51) is provided with an operating portion (512), the operating portion (512) is inclined toward a side away from the compass head (1), and the operating portion (512) is subjected to force to drive the locking button (51) to rotate.

6. A compass with a locking mechanism according to claim 4 or 5, characterized in that: The compass head (1) is provided with a mounting seat (12) adapted to the locking button (51), and the locking button (51) is provided with a second rotating shaft (53) adapted to the mounting seat (12), and an end of the second rotating shaft (53) is rotatably connected to the mounting seat (12) so that the locking button (51) is rotatably connected to the mounting seat (12).

7. A compass with a locking mechanism according to claim 1, characterized in that: A dividing plate (6) is installed between the head of the first supporting leg (2) and the head of the second supporting leg (3); the dividing plate (6) is provided with a second accommodating groove (61); the head of the first supporting leg (2) is provided with a first rotating protrusion (22) adapted to the second accommodating groove (61); the head of the second supporting leg (3) is provided with a second rotating protrusion (32) adapted to the second accommodating groove (61); the first rotating protrusion (22) and the second rotating protrusion (32) are both rotatably inserted in the second accommodating groove (61); the first supporting leg (2) and the second supporting leg (3) are linked and matched through the dividing plate (6).

8. A compass with a locking mechanism according to claim 1, characterized in that: The pressing member (52) is installed on the side where the head of the first supporting leg (2) is located, and the outer edge of the head of the first supporting leg (2) is provided with a first guide surface (23) adapted to the convex portion (521).

9. A compass with a locking mechanism according to claim 1, characterized in that: The pressing member (52) is installed on the side where the head of the second leg (3) is located, and the outer edge of the head of the second leg (3) is provided with a second guide surface (33) adapted to the convex portion (521).

10. A compass with a locking mechanism according to claim 1, characterized in that: The compass head (1) is provided with a second slide groove (13) adapted to the pressing piece (52), the pressing piece (52) is slidably installed in the second slide groove (13), and the surface of the protrusion (521) protrudes relative to the inner wall of the compass head (1).

Images