Handheld range finder

Abstract

The handheld range finder comprises a working box, a lifting plate is arranged at the top of the working box, a fixing frame is fixedly connected to the middle of the top of the lifting plate, a fixing shaft is fixedly connected to the middle of the top of the inner side of the fixing frame, and a rotating ring is rotationally connected to the end, away from the fixing frame, of the fixing shaft; a distance measuring instrument is fixedly connected to the side, away from the fixing shaft, of the rotating ring, a lifting mechanism is arranged in the working box, and a fixing mechanism and an aligning mechanism are arranged at the top of the lifting plate. According to the range finder, when the inclination angle of the range finder is too large, a first floating plate is suddenly pressed down, a first magnetic ring arranged at the bottom of the first floating plate is close to a third magnetic ring, and due to the fact that the magnetic poles of the right sides of the first magnetic ring and the third magnetic ring are the same, the third magnetic ring and the first magnetic ring repel each other, and then the first magnetic ring is pushed; and the situation that the connecting frame cannot return due to excessive downward movement can be prevented.

Description

Technical Field

[0001] This invention relates to the field of engineering surveying equipment technology, specifically a handheld rangefinder. Background Technology

[0002] A handheld laser rangefinder is an instrument that uses laser light to accurately measure the distance to a target. When working, the laser rangefinder emits a very thin laser beam towards the target. A photoelectric element receives the reflected laser beam, and a timer measures the time it takes for the laser beam to travel from emission to reception, calculating the distance from the observer to the target. It can measure distance, area, and volume, and can be used both indoors and outdoors.

[0003] When taking measurements, one side needs to be aligned with the wall before pressing the button to take the measurement. However, in some special terrains, such as uneven walls, manual adjustment of the handheld rangefinder is required, making the distance measurement work inconvenient. This issue needs to be addressed.

[0004] Therefore, it is necessary to design a handheld rangefinder that is highly practical and can automatically adjust the level of the rangefinder. Summary of the Invention

[0005] The purpose of this invention is to provide a handheld rangefinder to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a handheld rangefinder, including a working box, a lifting plate is provided on the top of the working box, a fixed frame is fixedly connected to the middle of the top of the lifting plate, a fixed shaft is fixedly connected to the middle of the top of the inner side of the fixed frame, a rotating ring is rotatably connected to the end of the fixed shaft away from the fixed frame, a rangefinder is fixedly connected to the side of the rotating ring away from the fixed shaft, a lifting mechanism is provided inside the working box, and a fixed mechanism and a return mechanism are provided on the top of the lifting plate.

[0007] The fixing mechanism includes:

[0008] The positioning frame has a positioning rotating shaft fixedly connected to the bottom center of its inner side. A return base is rotatably connected to the center of the positioning rotating shaft. A spring is fixedly connected to the bottom of the return base. A U-shaped tube is fixedly connected to the bottom of the spring. A support frame is fixedly connected to the center of the outer side of the U-shaped tube.

[0009] According to the above technical solution, the lifting mechanism includes a motor, a first pulley, a belt, a second pulley, a rotating rod, a rotating cylinder, a ball bearing nut assembly, and a lifting threaded rod. The motor is fixedly connected to the bottom center of the working box and has an output shaft. The first pulley is fixedly connected to the motor output shaft. The right end of the belt is driven and connected to the first pulley. The second pulley is fixedly connected to the left end of the belt. The rotating rod is fixedly connected to the middle of the second pulley. The rotating cylinder is fixedly connected to the top of the rotating rod. The ball bearing nut assembly is fixedly connected to the top of the rotating cylinder. The lifting threaded rod is threadedly connected to the middle of the ball bearing nut assembly.

[0010] According to the above technical solution, the return mechanism includes a connecting frame, a float plate one, a connecting line, a magnetic ring one, and a magnetic ring three. The connecting frame is fixedly connected to the bottom middle of the return base, the float plate one is fixedly connected to the bottom end of the connecting frame, the connecting line is fixedly connected to the bottom middle of the float plate one, the magnetic ring one is fixedly connected to the bottom of the float plate one on the outer ring of the connecting line, and the magnetic ring three is fixedly connected to the bottom middle of the U-shaped tube.

[0011] According to the above technical solution, the connecting line is fixedly connected to the second float at the end away from the first float. The U-shaped tube is filled with salt water between the bottom of the second float and the first float. The salt water has a high density, which increases the buoyancy of the second float and the first float.

[0012] According to the above technical solution, the bottom of the first magnetic ring is the same as the right magnetic pole of the third magnetic ring, and the bottom of the second float plate is fixedly connected to the second magnetic ring. The bottom of the second magnetic ring is the same as the left magnetic pole of the third magnetic ring. When the first float plate and the second float plate approach the third magnetic ring, they will repel each other and push the second float plate and the first float plate when they approach each other.

[0013] According to the above technical solution, there are two of each of the positioning frame, positioning rotating shaft, return base and spring. The two positioning frames, positioning rotating shaft, return base and spring are symmetrically distributed on the left and right sides of the top of the U-shaped tube, so that the left and right sides of the rangefinder can be supported at the same time.

[0014] According to the above technical solution, the bottom end of the rotating rod is rotatably connected to the inner wall of the bottom of the work box, the bottom end of the lifting threaded rod is provided with a limit ring, and a handle is fixedly connected to the middle of the bottom of the work box for easy carrying.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: When it is necessary to measure the distance on an uneven wall surface, the right side of the work box is placed close to the wall surface. At this time, the center of the rangefinder changes with the tilt angle, causing the rangefinder to tilt. At this time, gravity compresses the spring, and the force on the spring can no longer support the rangefinder to lift. At the same time, the positioning rotation shaft moves downward, which in turn causes the connecting frame to push the float plate down. Since the magnetic ring three is filled with salt water, the float plate one floats up in the U-shaped tube, and at the same time, it generates an upward thrust on the return base, which can relieve the pressure on the spring. At the same time, the spring can support the rangefinder again, and the rangefinder can rotate on the fixed shaft through the rotating ring, thus performing horizontal operation.

[0016] When the rangefinder tilts too much, float plate one is suddenly pressed down. At this time, magnetic ring one and magnetic ring three set at the bottom of float plate one are close to each other. Since magnetic ring one and magnetic ring three have the same right magnetic pole, magnetic ring three and magnetic ring one repel each other, thus pushing magnetic ring one. At the same time, since float plate one is connected to float plate two through a connecting line, it can prevent the connecting frame from moving down too much and failing to return to the correct position.

[0017] When height adjustment is required, the motor is turned on, causing pulley one to rotate. At this time, pulley one drives pulley two to rotate via a belt. Simultaneously, pulley two rotates the internal rotating rod, causing the rotating cylinder to rotate. Consequently, the ball nut assembly rotates, and the lifting threaded rod rises within the ball nut assembly. This allows the device to be adjusted in height as needed during use. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the interior of the working box of the present invention;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the rotating ring cut-off point of the present invention;

[0023] Figure 5 This is an exploded schematic diagram of the ball nut assembly of the present invention;

[0024] Figure 6 This is a schematic diagram of the spring section of the present invention;

[0025] Figure 7 This is a schematic diagram of the interior of the U-shaped tube of the present invention.

[0026] In the diagram: 1. Working box; 2. Lifting plate; 3. Fixed frame; 4. Fixed shaft; 5. Rotating ring; 6. Rangefinder; 7. Lifting mechanism; 701. Motor; 702. Belt pulley one; 703. Belt; 704. Belt pulley two; 705. Rotating rod; 706. Rotating cylinder; 707. Ball bearing nut pair; 708. Lifting threaded rod; 8. Fixed mechanism; 801. Positioning frame; 802. Positioning rotating shaft; 803. Return base; 804. Spring; 805. U-tube; 806. Support frame; 9. Return mechanism; 901. Connecting frame; 902. Float plate one; 903. Connecting line; 904. Magnetic ring one; 905. Magnetic ring three. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-6 The present invention provides a technical solution: a handheld rangefinder, including a working box 1, a lifting plate 2 on the top of the working box 1, a fixed frame 3 fixedly connected to the middle of the top of the lifting plate 2, a fixed shaft 4 fixedly connected to the middle of the top of the inner side of the fixed frame 3, a rotating ring 5 rotatably connected to the end of the fixed shaft 4 away from the fixed frame 3, and a rangefinder 6 fixedly connected to the side of the rotating ring 5 away from the fixed shaft 4. A lifting mechanism 7 is provided inside the working box 1, and a fixed mechanism 8 and a return mechanism 9 are provided on the top of the lifting plate 2.

[0029] Fixed mechanism 8 includes:

[0030] The positioning frame 801 has a positioning rotating shaft 802 fixedly connected to the middle of the bottom inner side of the positioning frame 801. The positioning rotating shaft 802 is rotatably connected to the middle of the centering base 803. The bottom of the centering base 803 is fixedly connected to a spring 804. The bottom end of the spring 804 is fixedly connected to a U-shaped tube 805. The middle of the outer side of the U-shaped tube 805 is fixedly connected to a support frame 806.

[0031] The lifting mechanism 7 includes a motor 701, a first pulley 702, a belt 703, a second pulley 704, a rotating rod 705, a rotating cylinder 706, a ball bearing nut pair 707, and a lifting threaded rod 708. The motor 701 is fixedly connected to the bottom center of the working box 1. The motor 701 has an output shaft. The first pulley 702 is fixedly connected to the output shaft of the motor 701. The right end of the belt 703 is driven and connected to the first pulley 702. The second pulley 704 is fixedly connected to the left end of the belt 703. The rotating rod 705 is fixedly connected to the middle of the second pulley 704. The rotating cylinder 706 is fixedly connected to the top of the rotating rod 705. The ball bearing nut pair 707 is fixedly connected to the top of the rotating cylinder 706. The lifting threaded rod 708 is threadedly connected to the middle of the ball bearing nut pair 707.

[0032] The bottom end of the rotating rod 705 is rotatably connected to the inner wall of the bottom of the work box 1. The bottom end of the lifting threaded rod 708 is provided with a limit ring. A handle is fixedly connected to the middle of the bottom of the work box 1 for easy carrying.

[0033] When measuring distances on uneven walls, the right side of the work box 1 is placed close to the wall. The center of the rangefinder 6 changes with the tilt angle, causing it to tilt. Gravity compresses the spring 804, making it unable to support the rangefinder 6. Simultaneously, the positioning rotating shaft 802 moves downwards, causing the connecting frame 901 to push the float 902 downwards. Since the magnetic ring 905 is filled with salt water, the float 902 floats upwards within the U-shaped tube 805, simultaneously exerting an upward thrust on the return base 803. This relieves the pressure on the spring 804, allowing it to support the rangefinder 6 again. The rangefinder 6 then rotates on the fixed shaft 4 via the rotating ring 5, enabling it to work horizontally.

[0034] When height adjustment is required, the motor 701 is turned on, causing the motor 701 to drive the pulley 702 to rotate. At this time, the pulley 702 drives the pulley 704 to rotate via the belt 703. Simultaneously, the rotation of the pulley 704 drives the internal rotating rod 705 to rotate, causing the rotating cylinder 706 to rotate. Consequently, the ball nut assembly 707 rotates, and the lifting threaded rod 708 rises within the ball nut assembly 707. This allows the device to be adjusted in height as needed during use.

[0035] Please see Figure 7The present invention provides a technical solution: the return mechanism 9 includes a connecting frame 901, a float plate 902, a connecting line 903, a magnetic ring 904, and a magnetic ring 905. The connecting frame 901 is fixedly connected to the bottom middle of the return base 803, the float plate 902 is fixedly connected to the bottom end of the connecting frame 901, the connecting line 903 is fixedly connected to the bottom middle of the float plate 902, the magnetic ring 904 is fixedly connected to the bottom of the float plate 902 on the outer ring of the connecting line 903, and the magnetic ring 905 is fixedly connected to the bottom middle of the U-shaped tube 805.

[0036] The end of the connecting line 903 away from float 902 is fixedly connected to float 2. The U-shaped tube 805 is filled with salt water between the bottom of float 2 and float 902. The salt water has a high density, which increases the buoyancy of float 2 and float 902.

[0037] The bottom of magnetic ring 904 is the same as the right magnetic pole of magnetic ring 905. Magnetic ring 2 is fixedly connected to the bottom of float plate 2. The bottom of magnetic ring 2 is the same as the left magnetic pole of magnetic ring 905. When float plate 902 and float plate 2 approach magnetic ring 905, they will repel each other and push float plate 2 and float plate 902 when they approach each other.

[0038] When the rangefinder 6 tilts at too large an angle, float plate 902 is suddenly pressed down. At this time, the magnetic ring 904 and magnetic ring 905 at the bottom of float plate 902 come close to each other. Since the right magnetic poles of magnetic ring 904 and magnetic ring 905 are the same, magnetic ring 905 and magnetic ring 904 repel each other, thus pushing magnetic ring 904. At the same time, since float plate 902 is connected to float plate 2 through connecting line 903, it can prevent the connecting frame 901 from moving down too much and failing to return to the correct position.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hand-held range finder comprising a working case (1), characterized in that: The work box (1) is provided with a lifting plate (2) on the top. A fixed frame (3) is fixedly connected to the middle of the top of the lifting plate (2). A fixed shaft (4) is fixedly connected to the middle of the top of the inner side of the fixed frame (3). A rotating ring (5) is rotatably connected to the end of the fixed shaft (4) away from the fixed frame (3). A rangefinder (6) is fixedly connected to the side of the rotating ring (5) away from the fixed shaft (4). A lifting mechanism (7) is provided inside the work box (1). A fixed mechanism (8) and a return mechanism (9) are provided on the top of the lifting plate (2). The fixing mechanism (8) includes: A positioning frame (801) is fixedly connected to a positioning rotating shaft (802) at the bottom center of the inner side of the positioning frame (801). A return base (803) is rotatably connected to the middle of the positioning rotating shaft (802). A spring (804) is fixedly connected to the bottom of the return base (803). A U-shaped tube (805) is fixedly connected to the bottom end of the spring (804). A support frame (806) is fixedly connected to the middle of the outer side of the U-shaped tube (805).

2. A hand-held range finder according to claim 1, wherein: The lifting mechanism (7) includes a motor (701), a first pulley (702), a belt (703), a second pulley (704), a rotating rod (705), a rotating cylinder (706), a ball bearing nut pair (707), and a lifting threaded rod (708). The motor (701) is fixedly connected to the bottom center of the work box (1). The motor (701) has an output shaft. The first pulley (702) is fixedly connected to the output shaft of the motor (701). (703) The right end is connected to the first pulley (702), the second pulley (704) is fixedly connected to the left end of the belt (703), the rotating rod (705) is fixedly connected to the middle of the second pulley (704), the rotating cylinder (706) is fixedly connected to the top of the rotating rod (705), the ball nut pair (707) is fixedly connected to the top inside the rotating cylinder (706), and the lifting threaded rod (708) is threadedly connected to the middle of the ball nut pair (707).

3. A hand-held range finder according to claim 2, wherein: The return mechanism (9) includes a connecting frame (901), a float plate (902), a connecting line (903), a magnetic ring (904), and a magnetic ring (905). The connecting frame (901) is fixedly connected to the middle of the bottom of the return base (803). The float plate (902) is fixedly connected to the bottom of the connecting frame (901). The connecting line (903) is fixedly connected to the middle of the bottom of the float plate (902). The magnetic ring (904) is fixedly connected to the bottom of the float plate (902) on the outer ring of the connecting line (903). The magnetic ring (905) is fixedly connected to the middle of the bottom of the U-shaped tube (805).

4. A hand-held range finder according to claim 3, wherein: The connecting line (903) is fixedly connected to the second float at the end away from the first float (902), and the U-shaped tube (805) is filled with salt water between the bottom of the second float and the first float (902).

5. A hand-held range finder according to claim 4, wherein: The bottom of the first magnetic ring (904) is the same as the right magnetic pole of the third magnetic ring (905), and the bottom of the second float plate is fixedly connected to the second magnetic ring, the bottom of the second magnetic ring is the same as the left magnetic pole of the third magnetic ring (905).

6. A handheld rangefinder according to claim 5, characterized in that: The number of the positioning frame (801), positioning rotation shaft (802), return base (803) and spring (804) are all two, and the two positioning frames (801), positioning rotation shaft (802), return base (803) and spring (804) are symmetrically distributed on the left and right sides of the top of the U-shaped tube (805).

7. A hand-held range finder according to claim 6, wherein: The bottom end of the rotating rod (705) is rotatably connected to the inner wall of the bottom of the work box (1), the bottom end of the lifting threaded rod (708) is provided with a limit ring, and a handle is fixedly connected to the middle of the bottom of the work box (1).

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