An angle-adjustable laser tape measure

Abstract

The utility model belongs to the technical field of measuring equipment, concretely relates to a laser tape measure with angle adjustment, which comprises a tape measure box, the tape measure box is connected by an upper shell and a lower shell, the upper shell is further rotationally connected with a rotary disc at the upper end, the rotary disc is further provided with a tape wheel fixing plate at the lower end, the space between the tape wheel fixing plate and the lower shell is used for installing a tape spring, a tape wheel, a tape and a tape groove, a laser assembly is further arranged between the rotary disc and the tape wheel fixing plate, and the laser assembly comprises a laser module, a PCB, a button cell and a micro switch, the laser module is fixed at the inner top of the rotary disc, the button cell is connected to the upper end of the PCB, and the two are clamped at the middle part of the rotary disc, the tape wheel fixing plate is further provided with an annular protrusion for triggering the micro switch, and the position of the annular protrusion corresponds to the micro switch. The utility model discloses a laser tape measure with angle adjustment, which is characterized in that the laser head is rotationally connected to the outer side of the tape measure, and the size and angle can be quickly measured and calibrated in combination with the tape.

Description

Technical Field

[0001] This utility model belongs to the field of measuring equipment technology, specifically relating to an angle-adjustable laser measuring tape. Background Technology

[0002] Measuring tapes are common measuring tools in daily life, especially steel measuring tapes, which are widely used in construction and decoration and are also essential household tools. When measuring, the tape is pulled out and the groove is aligned with the starting point; the reading at the alignment with the ending point is considered the measured distance. When pulled out for a longer distance, the tape deforms, easily causing measurement errors. A common solution is to install a laser head at the front of the tape measure, using the laser point to align with the measurement point to reduce errors. Currently, in tape measures with laser heads, the laser head is fixed above the groove and is generally used as an auxiliary tool for fixed angle calibration; it cannot measure or calibrate arbitrary angles. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the background technology mentioned above, and to provide an angle-adjustable laser measuring tape, in which the laser head is rotatably connected to the outside of the measuring tape, and combined with the measuring tape, it can quickly measure and calibrate dimensions and angles.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an angle-adjustable laser measuring tape, comprising a measuring tape box, wherein the measuring tape box is composed of an upper shell and a lower shell connected together, a rotating disk is rotatably connected to the upper end of the upper shell, and a measuring wheel fixing plate is provided at the lower end of the rotating disk. The space between the measuring wheel fixing plate and the lower shell is used to install a measuring spring, measuring wheel, measuring belt and measuring groove. A laser assembly is also provided between the rotating disk and the measuring wheel fixing plate, including a laser module, a PCB board, a button battery and a micro switch. The laser module is fixed to the inner top of the rotating disk, the upper end of the PCB board is connected to the button battery, and the two are snapped into the middle of the rotating disk. A battery cover is also rotatably snapped into the middle of the upper part of the rotating disk for replacing and installing the button battery. The micro switch is fixedly connected to the inner bottom surface of the rotating disk. An annular protrusion for triggering the micro switch is also provided on the measuring wheel fixing plate, the position of which corresponds to the micro switch.

[0005] Furthermore, the annular protrusion is provided with an avoidance notch located at the horizontal position corresponding to the rotating disk, so that the micro switch is located at the avoidance notch when in the horizontal position to disconnect the micro switch.

[0006] Furthermore, the micro switch is also provided with limiting posts fixed to the bottom surface of the rotating disk around its perimeter. The height of the limiting posts is greater than the height of the micro switch, and the annular protrusion does not interfere with the limiting posts.

[0007] Furthermore, a horizontal bubble is provided on the top of the rotating disk, and a vertical bubble is provided on the side of the measuring tape box.

[0008] Furthermore, the surface of the upper shell is also etched with scale lines.

[0009] The beneficial effects of this utility model are: 1) This utility model is equipped with a rotating disk, and the laser component is snapped onto the rotating disk and located on the outer side of the measuring tape box. When rotating, the micro switch contacts the annular protrusion to trigger the laser module to mark points. When the measuring tape box is aligned with the horizontal and vertical, the angle information can be directly read through the rotating scale. Combined with the measurement data of the tape, the angle and distance information at any position can be calculated. Conversely, the position of the point to be marked can be located according to the horizontal or vertical distance of the construction drawing combined with the angle information, reducing the measurement and calculation process. The structure is simple and the calibration is convenient. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 for Figure 1 A half-section view.

[0012] Figure 3 Explosive decomposition of laser components Figure 1 .

[0013] Figure 4 Explosive decomposition of laser components Figure 2 .

[0014] Figure 5 This is a schematic diagram showing the connection between the micro switch and the rotating disk.

[0015] In the diagram: 1. Measuring tape box; 2. Upper shell; 3. Lower shell; 4. Rotating disk; 5. Measuring wheel fixing plate; 6. Laser assembly; 7. Laser module; 8. PCB board; 9. Button battery; 10. Micro switch; 11. Battery cover; 12. Annular protrusion; 13. Limiting post; 14. Clearance notch; 15. Horizontal bubble; 16. Vertical bubble; 17. Scale line. Detailed Implementation

[0016] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0017] Example: As shown in the figure, the adjustable laser measuring tape of this utility model includes a measuring tape box 1, which is composed of an upper shell 2 and a lower shell 3. A rotating disk 4 is rotatably connected to the upper end of the upper shell 2. A measuring wheel fixing plate 5 is also provided at the lower end of the rotating disk 4. The space between the measuring wheel fixing plate 5 and the lower shell 3 is used to install a measuring spring, measuring wheel, measuring belt and measuring groove. A laser assembly 6 is also provided between the rotating disk 4 and the measuring wheel fixing plate 5, including a laser module 7, a PCB board 8, a button battery 9 and a micro switch 10. The laser module 7 is fixed to the inner top of the rotating disk 4. The upper end of the PCB board 8 is connected to the button battery 9. The two are snapped into the middle of the rotating disk 4. A battery cover 11 is also rotatably snapped into the middle of the rotating disk 4 for replacing and installing the button battery 9. The micro switch 10 is fixedly connected to the inner bottom surface of the rotating disk 4. An annular protrusion 12 for triggering the micro switch 10 is also provided on the measuring wheel fixing plate 5, and its position corresponds to the micro switch 10.

[0018] The rotating disk 4 is fixed to the upper shell 2 by a flange. The lower shell 3 uses a gear fixing plate to press the ruler spring, ruler wheel, ruler belt and ruler groove together. The top of the rotating disk 4 is provided with two horizontal rotating protrusions, which are convenient for fingers to hold and drive the rotating disk 4 to rotate inside the upper shell 2. The rotating disk 4 has a through hole at its center. The PCB board 8 and button battery 9 are installed in the through hole. The upper part is fastened with a battery cover 11 for easy replacement of button battery 9. The rotating protrusions have through holes in the direction of ruler belt stretching to facilitate the laser module 7 to emit calibration lines. The installation structure and connection relationship of the ruler wheel, ruler belt and ruler groove in the measuring tape box 1 are existing technologies and will not be described in detail here.

[0019] An abutment 12 is also provided with a clearance notch 13, located at the horizontal position corresponding to the rotating disk 4. This allows the micro switch 10 to be positioned at the clearance notch 13 when in the horizontal position, thus disconnecting the micro switch 10. When in the horizontal position, the micro switch 10 is suspended, keeping the circuit of the laser module 7 in the off state. During routine horizontal or vertical measurement and marking, the use of the laser component 6 is unnecessary, saving battery power and extending its service life. When the rotation passes the horizontal position, the abutment 12 will press against the micro switch 10 to connect the circuit. The laser can be turned on without additional switching operation during use. Similarly, the circuit can be disconnected after the rotating disk 4 is reset. The abutment 12 is pressed against the micro switch 10 to connect the circuit, and the circuit is disconnected when passing the clearance notch 13. This achieves marking after rotation and disconnection after reset, eliminating the need for manual start and stop operation. It can automatically control the on and off state, simplifying the switching structure and making it particularly suitable for multiple working scenarios of marking and measurement.

[0020] The micro switch 10 is surrounded by limiting posts 14 fixed to the bottom surface of the rotating disk 4. The height of the limiting posts 14 is greater than the height of the micro switch 10, and the annular protrusion 12 does not interfere with the limiting posts 14. The limiting posts 14 are supported between the rotating disk 4 and the measuring wheel fixing plate 5. When the disk is at a horizontal angle, the circuit is broken. Even if the rotating disk 4 is pressed by external force, it will be supported by the limiting posts 14, protecting the micro switch 10 and preventing accidental triggering of the laser module 7 during transport, thus improving safety.

[0021] A horizontal bubble 15 is also provided on the top of the rotating disk 4, and a vertical bubble 16 is also provided on the side of the measuring tape box 1. The horizontal bubble 15 is located on the same horizontal line as the laser module 7 and is parallel to the stretching direction of the measuring groove. The vertical bubble 16 is installed on the side of the measuring tape box 1 and is fixed by the upper shell 2 and the lower shell 3.

[0022] The surface of the upper shell 2 is also etched with scale lines 17, with the horizontal direction (the stretching direction of the groove) as the zero point. The rotation angle between the rotating disk 4 and the upper shell 2 can be directly read through the scale lines 17. The horizontal bubble 15 on the rotating disk 4 is also aligned with the horizontal direction, so that the laser module 7 is aligned with the horizontal direction. The value read directly is actually the angle between the laser module 7 and the stretching tape. When performing the marking and positioning operation, the spatial point can be directly laser positioned according to the angle and horizontal / vertical information of the drawing, without the need for calculation or repeated measurement.

[0023] In practical use, the measuring tape box 1 is placed horizontally / vertically using the horizontal bubble 15 or vertical bubble 16. Using the horizontal / vertical distances given in the drawing, the measuring tape box 1 is moved to measure its horizontal and vertical positions, positioning it at the first point. Then, the position of the measuring tape box 1 is adjusted, and according to the angle information in the drawing, the rotating disk 4 is rotated so that its angle corresponds to the information in the drawing. The point marked by the laser module 7 is the second point to be marked. The principle is that the second point in space has two angles with the first point, one horizontal and one vertical. After the first point is located, the position of the second point can be calculated only based on the vertical height and vertical angle. In actual calibration, only the vertical height needs to be used as an auxiliary line, and the rotating disk... Rotate disc 4 to the specified angle (vertical direction), then rotate measuring tape box 1 itself (horizontal direction) to make the laser line intersect with the auxiliary line. The intersection point is the second point to be calibrated, eliminating the need for repeated measurements and calculations. Conversely, when two points are known, place measuring tape box 1 at the first point, rotate disc 4 and measuring tape box 1 to align the laser line with the second point, and the reading is the vertical angle. The horizontal angle can be directly calculated by measuring the vertical and horizontal distances to the second point, or the horizontal projection point of the second point can be used as an auxiliary point. With the measuring tape perpendicular to the wall, align the laser line with the auxiliary point, and the reading is the horizontal angle. This reduces the number of calculations and measurements, and combined with the measuring tape, allows for rapid measurement and calibration of dimensions and angles.

[0024] This invention features a rotating disk on which a laser component is attached. Located on the outer side of the measuring tape box, the laser module is triggered to mark points by a microswitch contacting an annular protrusion during rotation. When the measuring tape box is aligned horizontally and vertically, the angle information can be directly read from the rotating scale. Combined with the measurement data of the tape, the angle and distance information at any position can be calculated. Conversely, the position of the point to be marked can be directly located based on the horizontal or vertical distance from the construction drawings, combined with the angle information, without the need for further measurement and calculation. The structure is simple and the calibration is convenient.

[0025] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. An angle-adjustable laser measuring tape, characterized in that: The device includes a measuring tape box, which consists of an upper shell and a lower shell connected together. A rotating disk is rotatably connected to the upper end of the upper shell, and a measuring wheel fixing plate is provided at the lower end of the rotating disk. The space between the measuring wheel fixing plate and the lower shell is used to install a measuring spring, measuring wheel, measuring tape, and measuring groove. A laser assembly is also provided between the rotating disk and the measuring wheel fixing plate, including a laser module, a PCB board, a button battery, and a micro switch. The laser module is fixed to the inner top of the rotating disk, and the button battery is connected to the upper end of the PCB board. The two are snapped into the middle of the rotating disk. A battery cover is also rotatably snapped into the middle of the rotating disk for replacing and installing the button battery. The micro switch is fixedly connected to the inner bottom surface of the rotating disk. An annular protrusion for triggering the micro switch is also provided on the measuring wheel fixing plate, and its position corresponds to the micro switch.

2. The adjustable laser measuring tape according to claim 1, characterized in that: The annular protrusion is also provided with an avoidance notch, which is located at the horizontal position corresponding to the rotating disk, so that the micro switch is located at the avoidance notch when in the horizontal position to disconnect the micro switch.

3. The adjustable laser measuring tape according to claim 2, characterized in that: The micro switch is also surrounded by limiting posts fixed to the bottom surface of the rotating disk. The height of the limiting posts is greater than the height of the micro switch, and the annular protrusion does not interfere with the limiting posts.

4. The adjustable laser measuring tape according to claim 1, characterized in that: The top of the rotating disk is also equipped with a horizontal bubble, and the side of the measuring tape box is also equipped with a vertical bubble.

5. The adjustable laser measuring tape according to claim 1, characterized in that: The surface of the upper shell is also etched with scale lines.

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