A compass with a pointer dial

Abstract

This utility model relates to the field of compasses and provides a compass with a pointer dial. It includes a compass head, pins and lead feet rotatably mounted on the compass head, connected by a transmission mechanism that allows the pins and lead feet to open and close opposite to each other. Each pin or lead foot has a connecting portion with a first tooth. The compass head has a first rotating shaft with a second tooth, which meshes with each other. The compass head also has a pointer dial with graduations and a first notch. A pointer slide is mounted on the first rotating shaft, with its tip extending through the first notch to the outer surface of the pointer dial. The tip of the pointer slide points to the graduation value of the compass opening. The compass can read the graduations through the pointer dial and pointer slide without the need for a ruler, improving the efficiency of drawing circles and solving the technical problem of low efficiency in drawing circles with a compass.

Description

Technical Field

[0001] This utility model relates to the field of compasses, and more particularly to a compass with a pointer dial. Background Technology

[0002] In the field of geometric drawing tools, the compass is the core tool for drawing circles or arcs, and its functionality and ease of use directly affect drawing efficiency and accuracy. Traditional compasses typically consist of a pin (fixed end), a lead foot (drawing end), and an adjustable hinge structure. The radius of the circle is controlled by manually adjusting the distance between the two feet. Most traditional compasses do not have graduations. When drawing a circle of a specific size, users must rely on an external ruler to pre-measure the radius and then repeatedly adjust the distance between the compass feet to match the target size. This process is not only cumbersome, but also prone to displacement of the pin and lead foot due to external forces (such as paper slippage or operational errors) during drawing, leading to radius errors and requiring remeasurement and recalibration, severely reducing drawing efficiency. Utility Model Content

[0003] Therefore, to address the aforementioned problems, this invention proposes a compass with a pointer dial. This solves the technical problem of low efficiency in drawing circles with a compass.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A compass with a pointer dial includes a compass head, a needle and a lead foot rotatably disposed on the compass head, the needle and the lead foot being connected by a transmission mechanism that enables the needle and the lead foot to open and close opposite to each other; the needle or the lead foot is provided with a connecting part, the connecting part having a first tooth; the compass head is provided with a first rotating shaft, the first rotating shaft having a second tooth, the first tooth and the second tooth being engaged; the compass head is provided with a pointer dial, the pointer dial having a scale, the pointer dial having a first notch, the first rotating shaft having a pointer piece, the front end of the pointer piece being able to extend through the first notch to the outer surface of the pointer dial, the scale indicated by the front end of the pointer piece being the value of the compass opening.

[0006] Further:

[0007] The pointer piece has a three-dimensional structure, and the front and rear ends of the pointer piece are not on the same plane.

[0008] The pointer piece has a circular or ring-shaped structure, and a second notch is provided on the pointer piece. The two ends of the second notch are the front end and the rear end of the pointer piece, respectively. The first rotating shaft is fixed to the center of the pointer piece.

[0009] The transmission mechanism includes a third tooth on the pin and a fourth tooth on the lead foot, the third tooth and the fourth tooth being engaged in a meshing connection.

[0010] The third tooth is located at the upper end of the pin, and the fourth tooth is located at the upper end of the lead pin. The first tooth and the fourth tooth are gear structures.

[0011] The connecting part has a triangular, quadrilateral, or elliptical structure, and the first tooth has an arc-shaped structure.

[0012] The first notch is located in the upper center of the pointer dial. The pointer piece is a different color from the pointer dial and is made of PVC material.

[0013] The compass head is provided with a mounting base, and the pointer dial is fixed to the mounting base.

[0014] The compass head includes a rear seat and a front cover detachably disposed on the rear seat. The rear seat and the front cover are fixed together by two locking members. The locking members have a second pivot. The pin and the lead pin are rotatably connected to the second pivot.

[0015] The rear seat and the front cover are provided with at least one pair of cooperating positioning grooves and positioning protrusions.

[0016] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0017] This utility model's compass features a pointer dial. During the opening and closing of the needle and lead feet, the end of the pointer plate points to the scale indicating the length and / or angle of the compass's opening, eliminating the need for a ruler and improving the efficiency of drawing circles. The pointer plate's sheet-like structure covers the outer surface of the pointer dial, providing a large area that allows users to quickly and intuitively read the scale, benefiting those with presbyopia, myopia, or color vision deficiencies. During circle drawing, any movement of the needle and lead feet under significant force is also readily apparent. The sheet-like structure of the pointer plate enhances stability and prevents deformation over extended use. The needle and lead feet directly incorporate a transmission mechanism, with the first and second teeth meshing together, further improving stability during opening and closing. Furthermore, the pointer... The pointer has a three-dimensional structure, with its front and rear ends not on the same plane, improving the rotation effect and preventing jamming. Furthermore, the transmission mechanism consists of a third and fourth toothed section meshing together, providing good stability. The connecting part has a triangular or quadrilateral structure, offering high strength and resistance to deformation. The first notch is located in the upper center of the pointer dial, similar to a clock face, facilitating reading. The pointer and dial are different colors, providing high contrast and easy visibility; the two colors are aesthetically pleasing and enhance readability. The compass head back seat and front cover are detachable for easy assembly, and the locking mechanism functions as both a locking mechanism and a pivot, saving parts and reducing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the compass of this utility model.

[0019] Figure 2 This is a structural diagram of a compass from another angle.

[0020] Figure 3 This is the front view of the compass.

[0021] Figure 4 This is a schematic diagram of the compass in its open state.

[0022] Figure 5 This is a partial structural diagram of a compass.

[0023] Figure 6 yes Figure 5 The exploded diagram.

[0024] Figure 7 It is a structural diagram of the pointer dial, pointer plate and first rotating shaft.

[0025] Figure 8 This is a schematic diagram of the pointer dial and the first rotating shaft.

[0026] Figure 9This is a schematic diagram of the pointer plate and the first rotating shaft.

[0027] Figure 10 It is a schematic diagram of the structure of an analog clock face with scales and numbers.

[0028] Figure label:

[0029] 1. Compass head; 11. First pivot; 110. Second tooth; 12. Mounting base; 13. Rear seat; 14. Front cover; 15. Locking element; 150. Second pivot; 16. Positioning groove; 17. Positioning protrusion; 2. Pin; 3. Lead foot; 4. Transmission mechanism; 41. Third tooth; 42. Fourth tooth; 5. Connecting part; 50. First tooth; 6. Pointer dial; 61. Scale; 62. First notch; 7. Pointer piece; 71. Second notch. Detailed Implementation

[0030] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to Figures 1 to 10 This embodiment provides a compass with a pointer dial, including a compass head 1, pins 2 and lead feet 3 rotatably disposed on the compass head 1, pins 2 and lead feet 3 are connected by a transmission mechanism 4, the transmission mechanism 4 can cause pins 2 and lead feet 3 to open and close opposite to each other; the lead feet 3 are provided with a connecting part 5, the connecting part 5 is provided with a first tooth 50, the compass head 1 is provided with a first rotating shaft 11, the first rotating shaft 11 is provided with a second tooth 110, the first tooth 50 and the second tooth 110 are meshed together, the compass head 1 is provided with a pointer dial 6, the pointer dial 6 is provided with a scale 61, the pointer dial 6 is provided with a first notch 62, the first rotating shaft 11 is provided with a pointer piece 7, the front end of the pointer piece 7 can extend through the first notch 62 to the outer surface of the pointer dial 6, the scale 61 pointed to by the front end of the pointer piece 7 is the value of the compass opening.

[0032] The aforementioned mark 61 can be similar to the markings on a watch, or it can be simply a number, or it can display an angle, or it can be any other structure capable of displaying numerical values, depending on the specific situation; for example... Figure 10 The number is marked on the 61 mark.

[0033] The front end of the aforementioned pointer piece 7 is usually the edge of the front end of the pointer piece 7; a mark can also be set on the front end of the pointer piece 7, which is close to the edge of the front end of the pointer piece 7, but not set at the very front edge. The mark points to the scale 61, which is the value of the compass opening. The specific setting depends on the situation.

[0034] The above values ​​can be the length and angle of the pointer piece, the length and angle, or other values, depending on the specific situation.

[0035] The connecting part 5 mentioned above can also be set on the pin 2, depending on the specific situation.

[0036] refer to Figure 7 and Figure 9 In one embodiment, the pointer piece 7 has a three-dimensional structure, and the front end and the rear end of the pointer piece 7 are not on the same plane.

[0037] The aforementioned pointer piece 7 can also be a planar structure, depending on the specific circumstances.

[0038] The aforementioned pointer dial 6 can be planar or three-dimensional, meaning that the front and rear ends of the pointer dial 6 are not on the same plane.

[0039] refer to Figure 9 In one embodiment, the pointer piece 7 is a circular structure, and a second notch 71 is provided on the pointer piece 7. The two ends of the second notch 71 are the front end and the rear end of the pointer piece 7, respectively, and the first rotating shaft 11 is fixed to the center of the pointer piece 7.

[0040] The pointer piece 7 mentioned above can also be a ring structure, or a bar, fan, semi-circle, spiral or other shape structure.

[0041] The size of the second notch 71 can also be one-quarter, one-fifth, or other sizes of the circular or annular pointer piece 7, or it can be formed by cutting only on the circular or annular pointer piece 7, depending on the specific situation.

[0042] When the compass is closed, most of the pointer piece 7 is located at the rear of the pointer dial 6, with one end of the pointer piece 7 located at the first notch 62 of the pointer dial 6. A small portion of this end rests against the front of the pointer dial 6. This structure facilitates the rotation of the pointer piece 7 and prevents the pointer piece 7 from getting stuck with the pointer dial 6. In another embodiment, when the compass is closed, the pointer piece 7 can also be entirely located at the rear of the pointer dial 6, depending on the specific situation.

[0043] refer to Figure 5 and Figure 6 In one embodiment, the transmission mechanism 4 includes a third tooth 41 disposed on the pin 2 and a fourth tooth 42 disposed on the lead foot 3, wherein the third tooth 41 and the fourth tooth 42 are engaged.

[0044] The aforementioned transmission mechanism 4 can also be any other mechanism that enables relative movement between the pin 2 and the lead pin 3 when they open and close, depending on the specific circumstances.

[0045] refer to Figure 5 and Figure 6 In one embodiment, the third tooth 41 is located at the upper end of the pin 2, and the fourth tooth 42 is located at the upper end of the lead pin 3. The first tooth 50 and the fourth tooth 42 are gear structures.

[0046] The third tooth 41 can also be located near the upper end of the pin 2, and the fourth tooth 42 can also be located near the upper end of the lead pin 3, depending on the specific situation.

[0047] refer to Figure 5 and Figure 6 In one embodiment, the connecting part 5 has a triangular structure, and the first tooth part 50 has an arc-shaped structure.

[0048] The connecting part 5 mentioned above can also be a quadrilateral, pentagonal, elliptical structure or other shapes, or an arc-shaped strip structure, depending on the specific situation.

[0049] In one embodiment, the first notch 62 is located in the upper center of the pointer dial 6, and the pointer piece 7 is a different color from the pointer dial 6.

[0050] The first notch 62 mentioned above may not be located in the upper center of the pointer dial 6. However, this structure makes reading the dial less convenient.

[0051] The colors of the pointer 7 and the pointer dial 6 are usually set to two colors with high contrast, such as white and red, or white and green, to facilitate reading; the colors of the pointer 7 and the pointer dial 6 can also be the same, but this structure makes reading less convenient.

[0052] The pointer piece 7 mentioned above is made of PVC or other materials, depending on the specific situation.

[0053] In one embodiment, the compass head 1 is provided with a mounting base 12, and the pointer dial 6 is fixed to the mounting base 12.

[0054] The mounting base 12 can be detachably connected to the compass head 1 by screws. This structure facilitates assembly and maintenance. Alternatively, the mounting base 12 can be integrally formed with the compass head 1, depending on the specific situation.

[0055] In one embodiment, the compass head 1 includes a rear seat 13 and a front cover 14 detachably disposed on the rear seat 13. The rear seat 13 and the front cover 14 are fixed together by two locking members 15. The locking members 15 have a second rotating shaft 150, and the pin 2 and lead 3 are rotatably connected to the second rotating shaft 150.

[0056] The second pivot 150 mentioned above may not be installed on the locking member 15. This structure requires more parts, is more complicated to assemble, and has a higher cost.

[0057] The compass head 1 mentioned above can also be configured with other structures to achieve assembly, depending on the specific circumstances.

[0058] In one embodiment, the rear seat 13 and the front cover 14 are provided with two pairs of cooperating positioning grooves 16 and positioning protrusions 17.

[0059] The number of the aforementioned positioning grooves 16 and positioning protrusions 17 can be one, two, three, or even more, depending on the specific circumstances.

[0060] The aforementioned positioning groove 16 and positioning protrusion 17 may be omitted, depending on the specific circumstances.

[0061] The working principle of this utility model is as follows:

[0062] When using the compass, the user opens the pin 2 and the lead foot 3. The third tooth 41 and the fourth tooth 42 drive the pin 2 and the lead foot 3 to move in opposite directions. The connecting part 5 moves through the first tooth 50 and the second tooth 110 to drive the first rotating shaft 11, thereby driving the pointer 7 to rotate. One end of the pointer 7 can pass through the first notch 62 and extend to the outer surface of the pointer dial 6. The end of the pointer 7 points to the scale 61, which is the length of the compass when it is open. The user can quickly and easily read the scale 61.

[0063] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A compass with a pointer disc, characterized in that: The compass includes a compass head, a needle and a lead foot rotatably mounted on the compass head, the needle and the lead foot being connected by a transmission mechanism that allows the needle and the lead foot to open and close opposite to each other; the needle or the lead foot is provided with a connecting part, the connecting part having a first tooth; the compass head is provided with a first rotating shaft, the first rotating shaft having a second tooth, the first tooth and the second tooth being meshed together; the compass head is provided with a pointer dial, the pointer dial having a scale, the pointer dial having a first notch, the first rotating shaft having a pointer plate, the front end of the pointer plate being able to extend through the first notch to the outer surface of the pointer dial, the scale indicated by the front end of the pointer plate being the compass opening value.

2. A compass set according to claim 1, wherein: The pointer piece has a three-dimensional structure, and the front and rear ends of the pointer piece are not on the same plane.

3. A compass set according to claim 1 or 2, characterised in that: The pointer piece has a circular or ring-shaped structure, and a second notch is provided on the pointer piece. The two ends of the second notch are the front end and the rear end of the pointer piece, respectively. The first rotating shaft is fixed to the center of the pointer piece.

4. A compass set according to claim 1, wherein: The transmission mechanism includes a third tooth on the pin and a fourth tooth on the lead foot, the third tooth and the fourth tooth being engaged in a meshing connection.

5. A compass set according to claim 4, wherein: The third tooth is located at the upper end of the pin, and the fourth tooth is located at the upper end of the lead pin. The first tooth and the fourth tooth are gear structures.

6. A compass set according to claim 1, wherein: The connecting part has a triangular, quadrilateral, or elliptical structure, and the first tooth has an arc-shaped structure.

7. A compass set according to claim 1, wherein: The first notch is located in the upper center of the pointer dial. The pointer piece is a different color from the pointer dial and is made of PVC material.

8. A compass set according to claim 1, wherein: The compass head is provided with a mounting base, and the pointer dial is fixed to the mounting base.

9. A compass set according to claim 1, wherein: The compass head includes a rear seat and a front cover detachably disposed on the rear seat. The rear seat and the front cover are fixed together by two locking members. The locking members have a second pivot, and the pin and the lead pin are rotatably connected to the second pivot.

10. A compass set according to claim 9, wherein: The rear seat and the front cover are provided with at least one pair of cooperating positioning grooves and positioning protrusions.

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