一种图纸造价标注用的可擦写定位尺结构
By designing a combination of an L-shaped positioning reference component, a main ruler, a protractor, and a connecting rod assembly, the problems of inaccurate positioning of existing positioning rulers and the need for frequent tool changes for angle and length measurements are solved. This achieves precise positioning and flexible marking, improving the positioning accuracy and usability of the positioning ruler.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 赵莹
- Filing Date
- 2025-10-15
- Publication Date
- 2026-07-17
AI Technical Summary
The existing cost annotation tools used for drawing positioning are inaccurate, require frequent tool changes for angle and length measurements, are prone to pen tip deviation, and have poor structural adjustment flexibility, making them difficult to adapt to different annotation scenarios.
An erasable positioning ruler structure was designed, comprising an L-shaped positioning reference component, a main ruler, a protractor, a connecting rod assembly, and an adjustment knob. The L-shaped positioning reference component provides precise right-angle positioning, the main ruler and protractor combine to achieve integrated measurement of angle and length, the connecting rod assembly and adjustment knob cooperate to achieve flexible adjustment of position and angle, and the groove of the main ruler and the rubber strip guide groove provide dual guidance and limitation for the erasable pen tip.
It improves positioning accuracy and usage flexibility, simplifies the operation process, adapts to the needs of different marking scenarios, avoids line skewing caused by pen tip deviation, and enhances the adaptability and ease of operation of the positioning ruler.
Smart Images
Figure CN224517590U_ABST
Abstract
Claims
1. A structure of a writable position ruler for a cost note of a drawing, characterized by, The system includes an L-shaped positioning reference (1), a main ruler (2), a protractor (3), a connecting rod assembly (4), and at least three adjusting knobs (5). The L-shaped positioning reference (1) is integrally formed from mutually perpendicular horizontal and vertical plates, with a first connecting seat at the end of the horizontal plate away from the vertical plate. The main ruler (2) has a second connecting seat at one end and millimeter-level graduations at the other end along its length. The connecting rod assembly (4) includes a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to the first connecting seat via a first adjusting knob (5), and the other end is rotatably connected to one end of the second connecting rod via a second adjusting knob (5). The other end of the second connecting rod is rotatably connected to the second connecting seat via a third adjusting knob (5). The protractor (3) has a semi-circular structure, with its straight side fixed to the end of the main ruler (2) near the second connecting seat by bolts. The arc edge of the protractor (3) has 0-180° angle graduations, and the center of the protractor (3) coincides with the rotation axis of the second connecting seat.
2. The structure of claim 1, wherein The inner edges of the horizontal and vertical plates are provided with right-angled reference lines with a width of 0.5 mm, and the intersection of the two reference lines coincides with the corner vertex of the L-shaped positioning reference piece (1).
3. The structure of claim 1, wherein The main ruler (2) is a transparent acrylic plate with a thickness of 2-3mm. Its front side has a centrally located groove along the length direction. The millimeter-level scale is engraved on the inner side wall of the groove. The width of the groove is adapted to the diameter of the erasable pen tip.
4. The structure of claim 1, wherein Both the first connecting seat and the second connecting seat are U-shaped groove structures. The ends of the first connecting rod and the second connecting rod are provided with connecting ears that are adapted to the U-shaped groove. The adjustment knob (5) passes through the side wall of the U-shaped groove and is rotatably connected to the connecting ear. The end of the adjustment knob (5) is provided with anti-slip texture.
5. The structure of claim 1, wherein The protractor (3) has a strip-shaped through hole on its straight edge. The bolt passes through the strip-shaped through hole and is threaded to the main ruler (2). The length direction of the strip-shaped through hole is consistent with the length direction of the main ruler (2).
6. The structure of claim 1, wherein Both the first and second connecting rods are rectangular metal rods with a length of 10-15cm, and the surface of the rods is marked with length.
7. The structure of claim 1, wherein The L-shaped positioning reference component (1) has a horizontal plate and a vertical plate length of 8-10cm, a plate thickness of 3-4mm, and rounded corners at the ends away from the corners.
8. The structure of claim 3, wherein A rubber strip is detachably embedded in the groove. The surface of the rubber strip is flush with the surface of the main ruler (2), and the rubber strip has a guide groove along its length that is compatible with the erasable pen.