CN211740212U - Curve caster - Google Patents

Abstract

The technical problem to be solved by the utility model is how to project a high-precision curve. The curve caster includes a host and a bracket. The host is located on the bracket. The host includes a point light source, a spherical shell, and a bar. The point light source is located in the center of the spherical shell. The spherical shell is transparent, and the bar is attached to the ball. On the outer surface of the shell, the strip body is a convex lens, and its focal length is the radius of the sphere. The light emitted by the point light source becomes parallel light after passing through the strip body. The strip body extends and bends on the outer surface of the spherical shell to form a series of circles with different radii and curvatures. Ellipses and other curves, the light from point lights passes through these bars and casts the desired curve shape. Since the light emitted by the point light source becomes parallel light after passing through the bar, no matter how far the distance is, the projected lines will not diverge, and the projection accuracy is high; at the same time, the projected projection can be continuously changed by changing the projection distance. size, not limited by the size of the curve shape.

Description

Curve caster

technical field

The utility model relates to the technical field of measurement, in particular to the measurement and payout during building construction.

Background technique

With the change of people's aesthetics, there are more and more curved building structures such as arcs. When the main body of the building or the decoration project is constructed, in addition to the horizontal and vertical lines, it is also necessary to project the corresponding shape of the curve. Existing laser projectors are generally used to project horizontal or vertical lines, and there is no line projector capable of projecting curves. At present, during construction, most of the release curves are measured manually on site with tools such as steel rulers. The manual operation has large errors, resulting in low accuracy of measurement curves, high labor costs and low efficiency. Therefore, it is very necessary and urgent to develop a line casting instrument that can project a curve.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is how to project a high-precision curve.

Curve caster, including host and bracket, the host is located on the bracket, the host includes a point light source, a spherical shell, and a bar, the point light source is located in the center of the spherical shell, the spherical shell is transparent, and the bar is attached to the ball On the outer surface of the shell, the strip body is a convex lens, and its focal length is the radius of the sphere. The light emitted by the point light source becomes parallel light after passing through the strip body. The strip body extends and bends on the outer surface of the spherical shell to form a series of circles with different radii and curvatures, Ellipses and other curves, the light from point lights passes through these bars and casts the desired curve shape.

Preferably, a support rod is also included, the support rod supports the host on the bracket, the support rod is formed by connecting multiple sections in series, and the height can be adjusted telescopically.

Preferably, it also includes a rotating frame, the rotating frame is a U-shaped structure, the upper end of the rotating frame is connected to the spherical shell through a rotating shaft, there is an angle plate at the rotating shaft, and the rotation angle of the spherical casing can be read, and the lower end of the rotating frame is fixedly connected with the support rod .

Preferably, it also includes a light source fixing rod, a power supply, a wire, and a switch. One end of the light source fixing rod is connected to the rotating shaft, and the other end fixes the point light source at the center of the sphere. The light source fixing rod and the rotating shaft are hollow, and the wire passes through the light source fixing rod and the rotating shaft. The rotating shaft connects the point light source with the power source, the power source is located on the rotating frame, and the switch is located on the loop formed by the power source, the wire and the point light source.

Preferably, the upper end of the bracket is a base, the base is provided with an automatic leveler, the base can be automatically leveled, the base is fixedly connected with the support rod, and the lower end of the bracket is a tripod.

Preferably, the bar-shaped body forms circles in horizontal and vertical directions on the outer surface of the spherical shell, forming a horizontal line and a vertical line, and the intersection point of the horizontal line and the vertical line is in the center of the ellipse.

Preferably, the point light source is a white LED light, the spherical shell is opaque except for the area to which the strip is attached, the curvature of the side to which the strip is attached is the same as the curvature of the spherical shell, and the width of the strip is 1- between 5mm.

Preferably, both the circle and the ellipse are colored, and adjacent two have different colors.

Preferably, there are multiple spherical shells, the strips on the spherical shells form curves including various shapes and curvatures required for building construction, and the spherical shells can be replaced.

Since the light emitted by the point light source becomes parallel light after passing through the bar, no matter how far the distance is, the projected lines will not diverge, and the projection accuracy is high; at the same time, the projection distance can be continuously changed by changing the projection distance. The size is not limited by the shape and size of the curve; the host can be rotated, the projection angle can be continuously changed, and the curvature of the projection curve can be changed as a whole to a certain extent, which expands the applicability.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the curve line casting instrument;

Figure 2 is a schematic diagram of a partially enlarged structure of the host;

Figure 3 is a right side view of the host;

Figure 4 is a left side view of the host;

Fig. 5 is the projection principle diagram of the present invention.

In the picture: 1. Main unit, 2. Bracket, 3. Point light source, 4. Spherical shell, 5. Bar body, 6. Circle, 7. Ellipse, 8. Support rod, 9. Scale, 10. Rotary frame, 11 . Shaft, 12. Light source fixing rod, 13. Power supply, 14. Lead wire, 15. Base, 16. Tripod, 17. Horizontal line, 18. Vertical line, 19. Parallel light.

Detailed ways

Example 1

As shown in Figure 1-4, the Curve Casting Instrument includes a main unit and a bracket. The main unit is located on the bracket. The main unit includes a point light source, a spherical shell, and a strip body. The point light source is located at the center of the spherical shell, and the spherical shell is transparent. The strip is attached to the outer surface of the spherical shell, the strip is a convex lens, and its focal length is the radius of the sphere. The light emitted by the point light source becomes parallel light after passing through the strip, and the strip extends and bends on the outer surface of the spherical shell to form a A series of circles, ellipses, and other curves with different radii and curvatures through which the light emitted by the point light source passes through these bars to project the desired curved shape.

It also includes a support rod, the support rod supports the host on the bracket, the support rod is connected in series with multiple sections, and the height can be adjusted telescopically.

It also includes a rotating frame. The rotating frame is a U-shaped structure. The upper end of the rotating frame is connected to the spherical shell through a rotating shaft. There is an angle plate at the rotating shaft, which can read the rotation angle of the spherical shell. The lower end of the rotating frame is fixedly connected to the support rod.

It also includes a light source fixing rod, a power supply, a wire, and a switch. One end of the light source fixing rod is connected to the rotating shaft, and the other end fixes the point light source at the center of the ball. The light source fixing rod and the rotating shaft are hollow, and the wire passes through the light source fixing rod and the rotating shaft. The point light source is connected with the power source, the power source is located on the rotating frame, and the switch is located on the loop formed by the power source, the wire and the point light source.

The upper end of the bracket is a base, the base is provided with an automatic leveler, the base can be automatically leveled, the base is fixedly connected with the support rod, and the lower end of the bracket is a tripod.

The bar-shaped body forms circles in horizontal and vertical directions on the outer surface of the spherical shell, forming a horizontal line and a vertical line, and the intersection point of the horizontal line and the vertical line is in the center of the ellipse.

The point light source is a white LED light. Except for the area where the strip is attached, other areas on the spherical shell are opaque. The curvature of the side where the strip is attached is the same as the curvature of the spherical shell. The width of the strip is between 1-5mm. . Other areas are opaque, which can enhance the relative visibility of the bar projection and adapt to construction sites with high light intensity.

Circles and ellipses are colored, and adjacent two have different colors. This is convenient for distinguishing the images projected by each bar, which is beneficial to projection and construction.

There are a plurality of spherical shells, the strips on the spherical shells form curves including various shapes and curvatures required for building construction, and the spherical shells can be replaced. This enables the curve caster to adapt to most curved building structures and has strong usability.

The usage method is as follows: a. According to the shape and size of the projected curve, select the corresponding circle, ellipse and other curves on the spherical shell for projection, and set the curve projection instrument at an appropriate distance; b. Turn on the point light source , if you need to project a standard circle or ellipse, align the projected center line of the circle or ellipse on the spherical shell with the center point of the circle or ellipse to be projected; if you need to project other curves, place the projected centerline of the circle or ellipse on the spherical shell The corresponding other curves are aligned with other curves that need to be projected; c. Fine-tune, when the curvature is different, rotate the host to adjust; when the projection size is different, move the curve caster back and forth to adjust.

As shown in FIG. 5 , the principle of the present utility model is: the bar is a convex lens, its focal length is the radius of the sphere, and the light emitted by the point light source becomes parallel light after passing through the bar. Therefore, no matter how far the distance is, the projected lines will not diverge, and the line projection accuracy is high.

Claims (9)

1. Curve line casting instrument, including a mainframe and a bracket, the mainframe is located on the bracket, and it is characterized in that the mainframe includes a point light source, a spherical shell, and a strip body, the point light source is located at the center of the spherical shell, the spherical shell is transparent, and the strips The body is attached to the outer surface of the spherical shell, the strip is a convex lens, and its focal length is the radius of the ball. The light emitted by the point light source becomes parallel light after passing through the strip, and the strip extends and bends on the outer surface of the spherical shell to form a series of radii, Circles, ellipses, and other curves with different curvatures. The light from point light sources passes through these bars to project the desired curved shape. 2. The curve line casting instrument according to claim 1, characterized by further comprising a support rod, the support rod supports the host on the bracket, the support rod is formed by connecting multiple sections in series, and the height can be telescopically adjusted. Has a scale to read the height adjustment. 3. The curve caster according to claim 2, characterized by further comprising a rotating frame, the rotating frame is a U-shaped structure, and the upper end of the rotating frame is connected with the spherical shell through a rotating shaft, and there is an angle plate at the rotating shaft, which can read the ball. The rotation angle of the shell, the lower end of the rotating frame is fixedly connected with the support rod. 4. The curve line casting instrument according to claim 3, characterized in that it further comprises a light source fixing rod, a power supply, a wire and a switch, one end of the light source fixing rod is connected with the rotating shaft, and the other end fixes the point light source at the center of the sphere, and the light source is fixed. The rod and the rotating shaft are hollow, and the wire passes through the light source fixing rod and the rotating shaft to connect the point light source with the power source. 5. The curve casting instrument according to claim 2, characterized in that the upper end of the support is a base, the base is provided with an automatic leveler, the base can be leveled automatically, the base is fixedly connected to the support rod, and the lower end of the support is a tripod. 6. The curve caster according to claim 1, wherein the bar-shaped body forms circles in horizontal and vertical directions on the outer surface of the spherical shell, forming horizontal lines and vertical lines, and the intersection of the horizontal lines and the vertical lines is in the ellipse. center. 7. The curve caster according to claim 1, characterized in that the point light source is a white led light, and the spherical shell is opaque except for the area to which the bar is attached, and the curvature of the side to which the bar is attached is the same as the The curvature of the spherical shell is the same, and the width of the strip is between 1-5mm. 8. The curve caster according to claim 1, characterized in that both the circle and the ellipse are colored, and adjacent two have different colors. 9. The curve caster according to claim 1, characterized in that there are a plurality of spherical shells, and the bars on the spherical shells form curves including various shapes and curvatures required for construction, and the spherical shells Can be used interchangeably.

Images