Laser distance measuring device with line casting function

Abstract

A laser distance measuring device with a line casting function comprises a distance measuring module and a switching mechanism. The distance measuring module comprises a transmitting unit and a receiving unit, the transmitting unit is configured to be capable of transmitting a laser point, and the receiving unit is configured to be capable of receiving reflected laser, reflected by a distance measuring object, of the laser point; the switching mechanism comprises a light ray modulation unit, and the light ray modulation unit is configured to be capable of switching between a first position and a second position and is configured to be capable of modulating the laser points emitted by the emitting unit into laser rays; when the light modulation unit is at the first position, the transmitting unit can transmit the laser point to the distance measurement object, and the receiving unit can receive the reflected laser reflected by the distance measurement object; and when the light ray modulation unit is at the second position, the light ray modulation unit can modulate the laser points emitted by the emission unit into the laser rays, and the laser rays are projected to a projection object.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring tools, in particular to a laser ranging device with a line projection function. Background Art

[0002] In the fields of modern building construction and decoration, the improvement of measurement accuracy and work efficiency is an important trend in the industry development. At present, there are mainly two types of measuring tools in the market: laser line projectors and laser rangefinders. Although these two types of products have different functions, in actual applications, they are often used simultaneously to meet different measurement requirements.

[0003] In many cases, users need to quickly switch between line projection and distance measurement. In the prior art, products with both line projection and distance measurement functions usually adopt a modular design for these two functions, that is, two independent modules of a rangefinder and a line projector are combined and assembled together. Although this combination can achieve the two functions, it faces a series of problems in actual use. First of all, the two modules are usually located at both ends of the product, and users must adjust these two modules during use to ensure that their working states can be switched normally. This relatively separated design may not only cause inconvenience in use, but also make the assembly process complex due to the high requirements for the space and accuracy of the device.

[0004] In addition, there are also significant differences in technical requirements between these two tools. The rangefinder mainly relies on point-projected laser for distance measurement, while the line projector usually needs to achieve line projection. This difference in function makes it difficult to coordinate their application requirements in a single laser emission module, especially in terms of the requirements for light source intensity. The demand for light source intensity of the line projector is generally higher than that of the rangefinder, which may lead to the problem of mismatched light source intensity when using the distance measurement function under the condition of high-intensity light source, thus affecting the measurement accuracy.

[0005] It should also be noted that there is an interference problem between the line projection function and the distance measurement function. In some cases, for example, if the distance measurement function is turned on in the line projection function state, it may lead to inaccurate distance measurement results. Therefore, how to effectively avoid the mutual interference of the two functions during use and ensure the accuracy of measurement data has become an important challenge in the current technology.

[0006] To sum up, the independent modular design of the existing line projectors and rangefinders in the market has a series of problems such as large space requirements, complex assembly, mismatched light source intensity and function interference, which significantly affect the user operation experience and measurement accuracy. Therefore, there is an urgent need for a new type of measuring tool that can effectively integrate these two functions, simplify user operation, and improve measurement efficiency and accuracy. Summary of the Utility Model

[0007] The object of the present utility model is to provide an efficient, simple and accurate measuring tool integrating line projection and ranging functions, so as to solve the deficiencies of existing products in terms of operation convenience, space utilization, light source management and function interference, and provide users with a better measuring experience and reliability.

[0008] To achieve the above object, the present utility model provides a laser ranging device with line projection, including a ranging module and a switching mechanism;

[0009] The ranging module includes a transmitting unit and a receiving unit. The transmitting unit is configured to be able to emit a laser point, and the receiving unit is configured to be able to receive the reflected laser of the laser point reflected by the ranging object;

[0010] The switching mechanism includes a light modulation unit. The light modulation unit is configured to be able to switch between a first position and a second position, and is configured to be able to modulate the laser point emitted by the transmitting unit into a laser line;

[0011] When the light modulation unit is at the first position, the transmitting unit can emit the laser point to the ranging object, and the receiving unit can receive the reflected laser reflected by the ranging object;

[0012] When the light modulation unit is at the second position, the light modulation unit can modulate the laser point emitted by the transmitting unit into the laser line and project it onto the line projection object.

[0013] Further, it further includes a light intensifying device, and the light intensifying device is configured to be able to increase the power of the laser point emitted by the transmitting unit.

[0014] Further, the light intensifying device increases the power of the laser point emitted by the transmitting unit through pulse width modulation.

[0015] Further, the light intensifying device is started or closed through a trigger switch.

[0016] Further, the trigger switch includes a switch operated mechanically or a switch operated non-mechanically.

[0017] Further, the switch operated non-mechanically includes a Hall switch.

[0018] Further, when the light modulation unit is at the first position or the second position, the switching mechanism makes the trigger switch act.

[0019] Further, when the light modulation unit is in the first position, the laser ranging device is configured to implement a ranging function, and the power of the laser spot emitted by the emitting unit is a first power; when the light modulation unit is in the second position, the laser ranging device is configured to implement a line projection function, and the power of the laser spot emitted by the emitting unit is a second power; the second power is greater than the first power.

[0020] Further, when the light modulation unit is in the second position, the laser line projected through the light modulation unit includes a first reference line, and the first reference line is parallel to the transverse direction of the laser ranging device or perpendicular to the transverse direction of the laser ranging device.

[0021] Further, when the light modulation unit is in the second position, the laser line projected through the light modulation unit includes a first reference line and a second reference line that are perpendicular to each other, and the first reference line is parallel to the transverse direction of the laser ranging device or perpendicular to the transverse direction of the laser ranging device.

[0022] Further, the light modulation unit includes a cylindrical lens or a grating sheet.

[0023] Further, it further includes a human-machine interaction interface, the human-machine interaction interface includes a button, and the light enhancement device is started or closed through the button.

[0024] Further, the human-machine interaction interface further includes a display screen.

[0025] Further, it further includes a position sensor, the position sensor is arranged at the laser emission port, and the position sensor is configured to detect whether the light modulation unit is in the second position.

[0026] Further, the position sensor includes a travel switch or an inductive switch.

[0027] Further, the switching mechanism further includes an additional housing that cooperates with the housing of the ranging module, the switching mechanism further includes an additional housing that cooperates with the housing at the end of the ranging module, the light modulation unit is installed on the additional housing, and the additional housing is configured to be removable from the housing at the end of the laser ranging device and attachable to the housing at the end of the laser ranging device.

[0028] Further, the switching mechanism further includes a bracket, the light modulation unit is installed on the bracket, and the bracket is configured to be able to drive the light modulation unit to switch between the first position and the second position.

[0029] Further, a slot is provided on the side wall of the housing of the ranging module; the bracket is configured to be removable from the slot and insertable into the slot.

[0030] Further, the bracket is connected to the end of the ranging module through a hinge shaft; the bracket is configured to be able to unfold and fold around the hinge shaft towards the end of the ranging module.

[0031] Further, the bracket is further configured to be able to retract into the interior of the ranging module after unfolding around the hinge shaft towards the end of the ranging module.

[0032] Further, the switching mechanism further includes a knob, one end of the knob is connected to the bracket, and the other end of the knob exposes the bottom surface of the housing of the ranging module.

[0033] Further, the knob is configured to be able to drive the bracket to translate, so that the light modulation unit deviates from the laser emission port of the transmitting unit and the laser receiving port of the receiving unit, or so that the light modulation unit corresponds to the laser emission port of the transmitting unit in position.

[0034] Further, one end of the bracket is sleeved on a rotating shaft, the rotating shaft is perpendicular to the end of the ranging module, one end of the knob is connected to one end of the bracket, and the light modulation unit is installed on the other end of the bracket.

[0035] Further, the knob is configured to be able to drive the bracket to rotate, so that the light modulation unit deviates from the laser emission port of the transmitting unit and the laser receiving port of the receiving unit, or so that the light modulation unit corresponds to the laser emission port of the transmitting unit in position.

[0036] Further, at least three convex portions are provided on the bottom surface of the housing of the laser ranging device.

[0037] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0038] With the single laser emission module integrating the ranging function and the line projection function in the present utility model, the volume requirement of the original equipment is significantly reduced, the assembly process is simplified, the operation is more convenient, and the space utilization rate and accuracy of the product are improved. By using the switching mechanism, the rapid switching between the point projection and line projection functions is realized, the operation process is simple and convenient, and at the same time, the light source intensity can be manually or adjusted through linkage to meet the different light intensity requirements of ranging and line projection. By setting the mutual shielding mechanism in two functional states, data errors caused by measurement in the wrong state are prevented, the accuracy of the measurement data is ensured, and energy conservation and user experience improvement are achieved. Description of the Drawings

[0039] Figure 1 is a schematic structural diagram of a laser distance measuring device with a plumb line according to an embodiment of the present utility model;

[0040] Figure 2 is Figure 1 the bottom view of the shown laser distance measuring device with a plumb line;

[0041] Figure 3 is Figure 1 the side view of the shown laser distance measuring device with a plumb line;

[0042] Figure 4 is Figure 3 the sectional view taken along the line A - A in

[0043] Figure 5 is Figure 3 the sectional view taken along the line B - B in

[0044] Figure 6 is Figure 1 the schematic structural diagram of the shown laser distance measuring device with a plumb line with part of the housing removed;

[0045] Figure 7 is a schematic structural diagram of a laser distance measuring device with a plumb line according to an embodiment of the present utility model;

[0046] Figure 8 is a schematic structural diagram of a laser distance measuring device with a plumb line according to an embodiment of the present utility model;

[0047] Figure 9 is a schematic structural diagram of a laser distance measuring device with a plumb line according to an embodiment of the present utility model;

[0048] Figure 10 is the flowchart of the control method of a laser distance measuring device with a plumb line according to an embodiment of the present utility model;

[0049] Figure 11 is the schematic structural diagram of a laser distance measuring device with a plumb line in the distance measuring state with part of the housing removed according to an embodiment of the present utility model;

[0050] Figure 12 is Figure 11 the schematic structural diagram of the shown laser distance measuring device with a plumb line in the plumb line state with part of the housing removed.

[0051] In the figure:

[0052] 10. Distance measuring module; 11. Transmitting unit; 12. Receiving unit; 13. Light outlet; 14. Laser emitting port; 15. Laser receiving port; 16. Housing; 17. Slot; 18. Convex part;

[0053] 20. Switching mechanism; 21. Light modulation unit; 22. Trigger switch; 23. Additional housing; 24. Bracket; 25. Hinge shaft; 26. Knob; 27. Rotating shaft;

[0054] 31. Light intensifying device; 32. Button; 33. Display screen. Detailed implementation mode

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the scope of protection of the present utility model.

[0056] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0057] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0058] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0059] Referring Figures 1-6 , the present utility model provides a laser distance measuring device with a line projection function, which includes a distance measuring module 10 and a switching mechanism 20.

[0060] The distance measuring module 10 includes a transmitting unit 11, a receiving unit 12 and a housing 16. In the distance measuring mode, the transmitting unit 11 emits a laser point, and the receiving unit 12 receives the reflected laser reflected by the distance measuring object from the laser point. The distance measuring module 10 can measure the phase delay generated by the laser for a round trip, and then convert the distance represented by the phase delay according to the wavelength of the laser.

[0061] An optical outlet 13 is provided at the end of the distance measuring module 10, and the optical outlet 13 corresponds to the laser emitting port 14 of the transmitting unit 11 and the laser receiving port 15 of the receiving unit 12 in position. Herein, the "end" refers to one side surface of the distance measuring module 10 in the length direction X.

[0062] The switching mechanism 20 includes a light modulation unit 21, and the light modulation unit 21 may include a cylindrical lens or a grating sheet. The light modulation unit 21 can switch between a first position and a second position, and can modulate the laser point emitted by the transmitting unit 11 into a laser line. In the distance measuring mode, when the light modulation unit 21 is in the first position, the transmitting unit 11 can emit a laser point to the distance measuring object, and the receiving unit 12 can receive the reflected laser reflected by the distance measuring object. In the line projection mode, when the light modulation unit 21 is in the second position, the light modulation unit 21 can modulate the laser point emitted by the transmitting unit 11 into a laser line and project it onto the line projection object.

[0063] In some embodiments, the laser line includes a first reference line, and the first reference line is parallel to the transverse direction of the distance measuring module 10 or perpendicular to the transverse direction of the distance measuring module 10. Herein, the "transverse direction" refers to the width direction Y of the distance measuring module 10.

[0064] In other embodiments, the laser line includes a first reference line and a second reference line that are perpendicular to each other, the first reference line is parallel to the transverse direction of the distance measuring module 10, and the second reference line is perpendicular to the transverse direction of the distance measuring module 10.

[0065] In the ranging mode, the power requirement for the laser spot emitted by the transmitting unit 11 is not high. When switching to the line projection mode, the light intensity of the line projection is relatively weak, so it is necessary to enhance the light intensity. In some embodiments, the laser ranging device may further include a light intensity enhancement device 31, and the light intensity enhancement device 31 can increase the power of the laser spot emitted by the transmitting unit 11 to enhance the light intensity of the line projection.

[0066] The light intensity enhancement device 31 can control the charging current by adjusting the pulse period and duty cycle through pulse width modulation (PWM) to increase the current in the circuit, thereby increasing the power of the laser spot emitted by the transmitting unit 11.

[0067] The laser device needs to comply with the IEC 60825 safety requirements, that is, the laser output power < 1mW. In the ranging mode, the power of the laser spot emitted by the transmitting unit 11 must be adjusted to meet the safety requirements. However, when the laser power in this state is used to switch to the projection mode for line projection, the light will be greatly scattered, and the power of the laser line projected through the light modulation unit 21 will also be significantly reduced, resulting in insufficient brightness of the line projection. In this case, it is still necessary to maintain not exceeding the IEC 60825 safety requirements, that is, the laser output power < 1mW, but the laser power can be further increased to improve the line projection brightness.

[0068] The output powers of both the laser spot and the laser line need to be kept < 1mW. The requirement for the laser spot is relatively high because the IEC 60825 optical power test method involves simulating the human eye reception in the laboratory. In the laboratory test, a converging lens with a diameter of 7mm is used for measurement within a 7mm converging range. Since the energy concentration of the laser spot within 7mm is much higher than that of the laser line, and most of the energy of the laser line will spread outside the 7mm range, the actual test only evaluates the light energy within the 7mm diameter range.

[0069] In some embodiments, the light intensity enhancement device 31 can be started or turned off by the trigger switch 22. The trigger switch includes a switch operated mechanically or a switch operated non-mechanically. The switch operated non-mechanically includes a Hall switch.

[0070] In some embodiments, the trigger switch 22 can be linked with the switching mechanism 20, and when the light modulation unit 21 is in the first position or the second position, the switching mechanism 20 causes the trigger switch 22 to act.

[0071] In some embodiments, when the light modulation unit 21 is in the first position, the laser ranging device realizes the ranging function, and the power of the laser spot emitted by the transmitting unit 11 is the first power. When the light modulation unit 21 is in the second position, the laser ranging device realizes the line projection function, and the power of the laser spot emitted by the transmitting unit 12 is the second power. The second power is greater than the first power.

[0072] In some embodiments, the ranging module 10 further includes a human-machine interaction interface, which includes a button 32 and a display screen 33. The button 32 and the display screen 33 are arranged on the top surface of the housing 16 of the ranging module 10. Herein, the "top surface" and the "bottom surface" refer to two opposite sides of the housing 16 of the ranging module 10 in the height direction Z, where the "top surface" is located in the direction indicated by the arrow in the height direction Z.

[0073] In some embodiments, the light enhancement device 21 can be started or turned off through the button 32. However, if the ranging function is turned on in the line projection function state, it may cause inaccurate ranging results. Therefore, we have set a mutual shielding mechanism between the two modes to prevent data errors caused by measurement in the wrong state and ensure the accuracy of the measurement data.

[0074] In some embodiments, the laser ranging device further includes a position sensor, which is arranged at the laser emission port 14. The position sensor can detect whether the light modulation unit 21 is in the second position. The position sensor can include a travel switch or an inductive switch. When the position sensor detects that the light modulation unit 21 is in the second position, the light enhancement device 21 is allowed to be started through the button 32, so that the power of the laser spot emitted by the emission unit 12 is the second power.

[0075] Reference Figure 7 , in some embodiments, a laser ranging device with line projection includes a ranging module 10 and a switching mechanism 20. The ranging module 10 includes an emission unit, a reception unit, and a housing 16. In the ranging mode, the emission unit emits a laser spot, and the reception unit receives the reflected laser of the laser spot reflected by the ranging object. The switching mechanism 20 includes a light modulation unit 21, and the light modulation unit 21 can include a cylindrical lens or a grating sheet. The light modulation unit 21 can modulate the laser spot emitted by the emission unit into a laser line. The switching mechanism 20 further includes an additional housing 23 that cooperates with the housing 16 at the end of the ranging module 10. The light modulation unit 21 is installed on the additional housing 23, and the additional housing 23 can be removed from the housing 16 at the end of the ranging module 10 and can be attached to the housing 16 at the end of the ranging module 10.

[0076] The additional housing 23 can be removed from the housing 16, and the light modulation unit 21 is also removed from the housing 16, so that the emitting unit can emit a laser spot to the ranging object, and the receiving unit can receive the reflected laser reflected by the ranging object, so that the laser ranging device realizes the ranging function. At this time, the light modulation unit 21 is at the first position. The additional housing 23 can also be attached to the housing 16, and the light modulation unit 21 is also attached to the housing 16, so that the light modulation unit 21 corresponds to the laser emission port of the emitting unit, so that the light modulation unit 21 can modulate the laser spot emitted by the emitting unit into a laser line and project it onto the line-projecting object, so that the laser ranging device realizes the line-projecting function. At this time, the light modulation unit 21 is at the second position.

[0077] Reference Figure 8 , In some embodiments, a laser ranging device with line projection includes a ranging module 10 and a switching mechanism 20. The ranging module 10 includes an emitting unit, a receiving unit, and a housing 16. In the ranging mode, the emitting unit emits a laser spot, and the receiving unit receives the reflected laser reflected by the ranging object through the laser spot. The switching mechanism 20 includes a light modulation unit 21, and the light modulation unit 21 may include a cylindrical lens or a grating sheet. The light modulation unit 21 can modulate the laser spot emitted by the emitting unit into a laser line. A slot 17 is formed on the side wall of the housing 16 of the ranging module 10. The switching mechanism 20 further includes a bracket 24, and the light modulation unit 21 is installed on the bracket 24. The bracket 24 can be taken out of the slot and can be inserted into the slot to drive the light modulation unit 24 to switch between the first position and the second position. The bracket 24 can be taken out of the slot 17, and the light modulation unit 21 is also taken out of the slot 17, so that the emitting unit can emit a laser spot to the ranging object, and the receiving unit can receive the reflected laser reflected by the ranging object, so that the laser ranging device realizes the ranging function. At this time, the light modulation unit 21 is at the first position. The bracket 24 can also be inserted into the slot 17, and the light modulation unit 21 is also inserted into the slot 17, so that the light modulation unit 21 corresponds to the laser emission port of the emitting unit, so that the light modulation unit 21 can modulate the laser spot emitted by the emitting unit into a laser line and project it onto the line-projecting object, so that the laser ranging device realizes the line-projecting function. At this time, the light modulation unit 21 is at the second position.

[0078] Reference Figure 9, in some embodiments, a laser distance measuring device with a line projection function includes a distance measuring module 10 and a switching mechanism 20. The distance measuring module 10 includes a transmitting unit, a receiving unit, and a housing 16. In the distance measuring mode, the transmitting unit emits a laser spot, and the receiving unit receives the reflected laser spot reflected by the distance measuring object. The switching mechanism 20 includes a light modulation unit 21, and the light modulation unit 21 may include a cylindrical lens or a grating sheet. The light modulation unit 21 can modulate the laser spot emitted by the transmitting unit into a laser line. The switching mechanism 20 further includes a bracket 24. The light modulation unit 21 is mounted on the bracket 24. The bracket 24 is connected to the end of the distance measuring module 10 through a hinge shaft 25 and can be unfolded and folded around the hinge shaft 25 towards the end of the distance measuring module 10 to drive the light modulation unit 21 to switch between a first position and a second position. The bracket 24 can be unfolded away from the end of the distance measuring module 10 around the hinge shaft 25, and the light modulation unit 21 also rotates away from the end of the distance measuring module 10 around the hinge shaft 25, so that the transmitting unit can emit a laser spot to the distance measuring object, and the receiving unit can receive the reflected laser reflected by the distance measuring object. Thus, the laser distance measuring device realizes the distance measuring function. At this time, the light modulation unit 21 is in the first position. The bracket 24 can also be folded towards the end of the distance measuring module 10 around the hinge shaft 25, and the light modulation unit 21 also rotates towards the end of the distance measuring module 10 around the hinge shaft 25, so that the light modulation unit 21 corresponds to the laser emitting port position of the transmitting unit. Thus, the laser distance measuring device realizes the line projection function. At this time, the light modulation unit 21 is in the second position.

[0079] Preferably, the bracket 24 can be retracted and stored inside the distance measuring module 10 after being unfolded towards the end of the distance measuring module 10 around the hinge shaft 25 to avoid damage and wear of the light modulation unit 21.

[0080] Reference Figures 1-6 , in some embodiments, a laser distance measuring device with a line projection function includes a distance measuring module 10 and a switching mechanism 20.

[0081] The distance measuring module 10 includes a transmitting unit 11, a receiving unit 12, and a housing 16. In the distance measuring mode, the transmitting unit 11 emits a laser spot, and the receiving unit 12 receives the reflected laser spot reflected by the distance measuring object. The distance measuring module 10 can measure the phase delay generated by the laser for a round trip and then calculate the distance represented by the phase delay according to the wavelength of the laser.

[0082] An optical outlet 13 is provided at the end of the distance measuring module 10, and the optical outlet 13 corresponds to the laser emitting port 14 of the transmitting unit 11 and the laser receiving port 15 of the receiving unit 12 in position.

[0083] The switching mechanism 20 includes a light modulation unit 21, and the light modulation unit 21 may include a cylindrical lens or a grating sheet. The light modulation unit 21 is capable of switching between a first position and a second position, and can modulate the laser spot emitted by the emitting unit 11 into a laser line. In the ranging mode, when the light modulation unit 21 is at the first position, the emitting unit 11 can emit a laser spot towards the ranging object, and the receiving unit 12 can receive the reflected laser reflected by the ranging object. In the line projection mode, when the light modulation unit 21 is at the second position, the light modulation unit 21 can modulate the laser spot emitted by the emitting unit 11 into a laser line and project it towards the line projection object.

[0084] In this embodiment, the projected laser line is a "cross line", including a first reference line and a second reference line that are perpendicular to each other. The first reference line is parallel to the transverse direction of the ranging module 10, and the second reference line is perpendicular to the transverse direction of the ranging module 10.

[0085] In other embodiments, the projected laser line can also be a "one-line", including a first reference line that is parallel to the transverse direction of the ranging module 10 or perpendicular to the transverse direction of the ranging module 10.

[0086] The switching mechanism 20 further includes a bracket 24, and the light modulation unit 21 is mounted on the bracket 24. The bracket 24 drives the light modulation unit 21 to translate and switch between the first position and the second position.

[0087] The switching mechanism 20 further includes a knob 26. One end of the knob 26 is connected to the bracket 24, and the other end of the knob 26 exposes the bottom surface of the housing 16 of the ranging module 10. The knob 26 can drive the bracket 24 to translate.

[0088] Now refer to Figure 2 and Figure 4 , the knob 26 can be turned to the right to indicate the "DIST (Distance)" mode. The knob 26 drives the bracket 24 to translate so that the light modulation unit 21 deviates from the laser emission port 14 of the emitting unit and the laser reception port 15 of the receiving unit, thereby enabling the laser ranging device to achieve the ranging function. At this time, the light modulation unit 21 is at the first position.

[0089] The knob 26 can also be turned to the left to indicate the "CROSS (Cross Line)" mode. The knob 26 drives the bracket 24 to translate so that the light modulation unit 21 corresponds to the position of the laser emission port 14 of the emitting unit, thereby enabling the laser ranging device to achieve the line projection function. At this time, the light modulation unit 21 is at the second position.

[0090] Refer to Figure 4, a trigger switch 22 is provided inside the left side surface of the housing 16 of the distance measurement module 10. When the dial 26 is turned to the left to indicate the "Cross" mode, the dial 26 drives the bracket 24 to translate leftward in place, causing the trigger switch 22 to actuate and turn on. When the dial 26 is turned to the right to indicate the "Dist" mode, the dial 26 drives the bracket 24 to translate rightward, and the trigger switch 22 is switched to the off state accordingly. Therefore, the trigger switch 22 can be linked with the switching mechanism.

[0091] When the light modulation unit 21 is in the first position, the laser distance measurement device realizes the distance measurement function, and the power of the laser spot emitted by the emitting unit 11 is the first power. When the light modulation unit 21 is in the second position, the laser distance measurement device realizes the line projection function, and the power of the laser spot emitted by the emitting unit 12 is the second power. Among them, the second power is greater than the first power.

[0092] When the trigger switch 22 is turned on, the laser distance measurement device enters the line projection mode, and the light intensifying device can be started by turning on the trigger switch 22. At this time, the power of the laser spot emitted by the emitting unit 12 is the second power. Preferably, refer to Figures 2-4 , at least three convex portions 18 are provided on the bottom surface of the housing 16 of the distance measurement module 10. The convex portions 18 protrude from the bottom surface of the housing 16 of the distance measurement module 10, and the size of the convex portions 18 in the height direction Z is lower than the size of the dial 26. Thus, the convex portions 18 enable the laser distance measurement device to be placed flat as a whole.

[0093] Refer to Figure 10 , in this embodiment, a control method for a laser distance measurement device with line projection includes:

[0094] Click the start button "ON" to start the laser distance measurement device;

[0095] The laser distance measurement device performs a status check;

[0096] Judge the state of the trigger switch:

[0097] If the trigger switch is in the off state, the laser distance measurement device enters the distance measurement mode, and the power of the laser spot emitted by the emitting unit is the first power;

[0098] Through the switching of the switching mechanism, the trigger switch is actuated to turn on, the laser distance measurement device switches to the line projection mode, and the power of the laser spot emitted by the emitting unit is the second power; click the shutdown button "OFF" to shut down, or hold down the start button "ON" for 5 seconds to shut down;

[0099] If the trigger switch is in the on state, the laser distance measurement device enters the line projection mode, and the power of the laser spot emitted by the emitting unit is the second power;

[0100] Through the switching mechanism, the trigger switch is actuated to disconnect, and the laser ranging device switches to the ranging mode. The power of the laser spot emitted by the transmitting unit is the first power. If there is no operation for 30 seconds, the laser output is turned off. If there is no operation for 120 seconds, the device shuts down, or it can be shut down by clicking the off button "OFF", or by long-pressing the on button "ON" for 5 seconds.

[0101] In some other embodiments, the light intensifying device 21 can also be started or turned off through the button 32.

[0102] The laser ranging device may further include a position sensor. The position sensor is arranged at the laser emission port 14. The position sensor can detect whether the light modulation unit 21 is in the second position. The position sensor can include a travel switch or an inductive switch. When the position sensor detects that the light modulation unit 21 is in the second position, it is allowed to start the light intensifying device 21 through the button 32, so that the power of the laser spot emitted by the transmitting unit 12 is the second power.

[0103] In this embodiment, a control method for a laser ranging device with a plumb line includes:

[0104] When initially powered on, the laser ranging device enters the ranging mode, and the power of the laser spot emitted by the transmitting unit is the first power. Only when the position sensor detects that the light modulation unit is in the second position can it be switched to the plumb line mode by pressing a button. At this time, the power of the laser spot emitted by the transmitting unit is the second power.

[0105] Reference Figure 1 、 Figure 5 、 Figure 11 and Figure 12 , in some embodiments, a laser ranging device with a plumb line includes a ranging module 10 and a switching mechanism 20.

[0106] The ranging module 10 includes a transmitting unit 11, a receiving unit 12 and a housing 16. In the ranging mode, the transmitting unit 11 emits a laser spot, and the receiving unit 12 receives the reflected laser reflected by the ranging object. The ranging module 10 can measure the phase delay generated by the laser for a round trip, and then convert the distance represented by the phase delay according to the wavelength of the laser.

[0107] An optical output port 13 is arranged at the end of the ranging module 10. The optical output port 13 corresponds to the laser emission port 14 of the transmitting unit 11 and the laser receiving port 15 of the receiving unit 12 in position.

[0108] The switching mechanism 20 includes a light modulation unit 21, and the light modulation unit 21 may include a cylindrical lens or a grating sheet. The light modulation unit 21 is capable of switching between a first position and a second position, and can modulate the laser spot emitted by the emitting unit 11 into a laser line. In the ranging mode, when the light modulation unit 21 is at the first position, the emitting unit 11 can emit a laser spot towards the ranging object, and the receiving unit 12 can receive the reflected laser reflected by the ranging object. In the line projection mode, when the light modulation unit 21 is at the second position, the light modulation unit 21 can modulate the laser spot emitted by the emitting unit 11 into a laser line and project it towards the line projection object.

[0109] In this embodiment, the projected laser line is a "cross line", including a first reference line and a second reference line that are perpendicular to each other. The first reference line is parallel to the transverse direction of the ranging module 10, and the second reference line is perpendicular to the transverse direction of the ranging module 10.

[0110] In other embodiments, the projected laser line can also be a "one-line", including a first reference line that is parallel to the transverse direction of the ranging module 10 or perpendicular to the transverse direction of the ranging module 10.

[0111] The switching mechanism 20 further includes a bracket 24, and the light modulation unit 21 is mounted on the bracket 24. The bracket 24 drives the light modulation unit 21 to rotate and switch between the first position and the second position.

[0112] The switching mechanism 20 further includes a knob 26. One end of the knob 26 is connected to the bracket 24, and the other end of the knob 26 exposes the bottom surface of the housing 16 of the ranging module 10. The knob 26 can drive the bracket 24 to rotate.

[0113] One end of the bracket 24 is sleeved on the rotating shaft 27. The rotating shaft 27 is perpendicular to the end of the ranging module 10. One end of the knob 26 is connected to one end of the bracket 24, and the light modulation unit 21 is mounted on the other end of the bracket 24.

[0114] The knob 26 can be turned to the left to indicate the "DIST" mode. The knob 26 drives the bracket 24 to rotate around the rotating shaft 27 so that the light modulation unit 21 deviates from the laser emission port 14 of the emitting unit 11 and the laser receiving port 15 of the receiving unit 12. Thus, the laser ranging device realizes the ranging function. At this time, the light modulation unit 21 is at the first position, as Figure 11 shown.

[0115] The knob 26 can also be turned to the right to indicate the "CROSS" mode. The knob 26 drives the bracket 24 to rotate around the rotating shaft 27 so that the light modulation unit 21 corresponds to the position of the laser emission port 14 of the emitting unit 11. Thus, the laser ranging device realizes the line projection function. At this time, the light modulation unit 21 is at the second position, as Figure 12as shown

[0116] On the inner side of the right side surface of the housing 16 of the ranging module 10, a trigger switch 22 is provided. When the dial 26 is turned to the left to indicate the "ranging (DIST)" mode, the dial 26 drives the bracket 24 to rotate clockwise to the in-place position, causing the trigger switch 22 to actuate and turn on. When the dial 26 is turned to the right to indicate the "cross-line (CROSS)" mode, the dial 26 drives the bracket 24 to rotate counterclockwise, and the trigger switch 22 is switched to the off state accordingly. Therefore, the trigger switch 22 can be linked with the switching mechanism 20.

[0117] When the light modulation unit 21 is in the first position, the laser ranging device realizes the ranging function, and the power of the laser spot emitted by the emitting unit 11 is the first power. When the light modulation unit 21 is in the second position, the laser ranging device realizes the cross-line function, and the power of the laser spot emitted by the emitting unit 12 is the second power. Among them, the second power is greater than the first power.

[0118] When the trigger switch 22 is turned on, the laser ranging device enters the ranging mode, and the light intensifying device 31 can be turned off by the turn-on of the trigger switch 22. At this time, the power of the laser spot emitted by the emitting unit 12 is the first power.

[0119] In some other embodiments, the light intensifying device 21 can also be started or turned off by a key 32.

[0120] The laser ranging device can also include a position sensor. The position sensor is arranged at the laser emission port 14, and the position sensor can detect whether the light modulation unit 21 is in the second position. The position sensor can include a travel switch or an inductive switch. When the position sensor detects that the light modulation unit 21 is in the second position, the light intensifying device 21 is allowed to be started by the key 32, so that the power of the laser spot emitted by the emitting unit 12 is the second power.

[0121] The innovation points of the present utility model mainly lie in:

[0122] 1. The present utility model integrates the ranging function and the cross-line function in the same laser ranging device, sharing the laser emitting unit. Through the switching mechanism or key input, the quick switching between the two functions is realized. Compared with the combination of two independent modules on the existing market, the present utility model significantly reduces the product volume, simplifies the operation, and improves the use convenience.

[0123] 2. Through the switching mechanism, including ways such as translation, rotation, and folding, the conversion of the laser from point projection to line projection is realized. This design enables the user to quickly and simply adjust the projection mode according to different application requirements, greatly improving the flexibility of the device.

[0124] 3. The ranging function and the line projection function have different requirements for the light source intensity. The present utility model sets the first and second laser powers and adapts to the requirements of different functional modules through manual switching or linkage switching of a switching mechanism. In addition, a trigger switch or a position sensor that can be linked is provided to automatically adjust the light source intensity to save energy and ensure the light source intensity that meets the standard requirements.

[0125] 4. The present utility model avoids the mutual interference between the ranging function and the line projection function by setting a mutual shielding mechanism between the ranging mode and the line projection mode. For example, turning on the ranging function in the line projection mode may result in inaccurate data. Therefore, a position sensor is designed to prohibit switching to another mode in a certain mode, thereby preventing the user from making measurements in a wrong state and ensuring the accuracy of the data.

[0126] 5. All adjustment and switching operations are designed to be simple and easy to perform. The user can complete various function conversions and light source adjustments through simple manual operations or automatic adjustments. This design not only improves the usability of the device but also enhances the user experience of the product.

[0127] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model and are not intended to limit the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the claims of the present utility model.

Claims

1. A laser ranging device with a plumb line, characterized in that, It includes a ranging module and a switching mechanism; The ranging module includes a transmitting unit and a receiving unit. The transmitting unit is configured to be able to emit a laser spot, and the receiving unit is configured to be able to receive the reflected laser of the laser spot reflected by the ranging object; The switching mechanism includes a light modulation unit. The light modulation unit is configured to be able to switch between a first position and a second position, and is configured to be able to modulate the laser spot emitted by the transmitting unit into a laser line; When the light modulation unit is at the first position, the transmitting unit can emit the laser spot towards the ranging object, and the receiving unit can receive the reflected laser reflected by the ranging object; When the light modulation unit is at the second position, the light modulation unit can modulate the laser spot emitted by the transmitting unit into the laser line and project it towards the line-projecting object.

2. The laser distance measuring device with a plumb line according to claim 1, characterized in that It further includes a light intensifying device. The light intensifying device is configured to be able to increase the power of the laser spot emitted by the transmitting unit.

3. The laser distance measuring device with a plumb line according to claim 2, characterized in that, The light intensifying device increases the power of the laser spot emitted by the transmitting unit by means of pulse width modulation.

4. The laser distance measuring device with a plumb line according to claim 2, characterized in that, The light intensifying device is started or turned off by a trigger switch.

5. The laser distance measuring device with a plumb line according to claim 4, characterized in that, The trigger switch includes a switch operated mechanically or a switch operated non-mechanically.

6. The laser distance measuring device with a plumb line according to claim 5, characterized in that, The switch operated non-mechanically includes a Hall switch.

7. The laser distance measuring device with a plumb line according to claim 4, characterized in that, When the light modulation unit is at the first position or the second position, the switching mechanism actuates the trigger switch.

8. The laser distance measuring device with a plumb line according to claim 1, characterized in that, The light modulation unit includes a cylindrical lens or a grating sheet.

9. The laser distance measuring device with a plumb line according to claim 2, characterized in that, It further includes a human-machine interaction interface. The human-machine interaction interface includes a button, and the light intensifying device is started or turned off through the button.

10. The laser distance measuring device with a plumb line according to claim 9, characterized in that, It further includes a position sensor. The position sensor is arranged at the laser emission port and is configured to detect whether the light modulation unit is at the second position.

11. The laser distance measuring device with a plumb line according to claim 1, characterized in that, The switching mechanism further includes an additional housing that cooperates with the housing at the end of the ranging module. The light modulation unit is installed on the additional housing, and the additional housing is configured to be able to be removed from the housing at the end of the laser ranging device and be able to be attached to the housing at the end of the laser ranging device.

12. The laser distance measuring device with a plumb line according to claim 1, characterized in that, The switching mechanism further includes a bracket. The light modulation unit is installed on the bracket, and the bracket is configured to be able to drive the light modulation unit to switch between the first position and the second position.

13. The laser distance measuring device with a plumb line according to claim 12, characterized in that A slot is opened on the side wall of the housing of the ranging module; the bracket is configured to be able to be taken out of the slot and be able to be inserted into the slot.

14. The laser distance measuring device with a plumb line according to claim 12, characterized in that, The bracket is connected to the end of the ranging module through a hinge shaft; the bracket is configured to be able to unfold and fold around the hinge shaft towards the end of the ranging module.

15. The laser distance measuring device with a plumb line according to claim 14, characterized in that, The bracket is further configured to be able to retract into the interior of the ranging module after unfolding around the hinge shaft towards the end of the ranging module.

16. The laser distance measuring device with a plumb line according to claim 12, characterized in that, The switching mechanism further includes a knob. One end of the knob is connected to the bracket, and the other end of the knob exposes the bottom surface of the housing of the ranging module.

17. The laser distance measuring device with a plumb line according to claim 16, characterized in that, The knob is configured to be able to drive the bracket to translate, so that the light modulation unit deviates from the laser emission port of the emission unit and the laser reception port of the reception unit, or so that the light modulation unit corresponds to the position of the laser emission port of the emission unit.

18. The laser distance measuring device with a plumb line as claimed in claim 16, wherein One end of the bracket is sleeved on a rotating shaft, the rotating shaft is perpendicular to the end of the distance measuring module, one end of the knob is connected to one end of the bracket, and the light modulation unit is installed on the other end of the bracket.

19. The laser distance measuring device with a plumb line according to claim 16, characterized in that, The knob is configured to be able to drive the bracket to rotate, so that the light modulation unit deviates from the laser emission port of the emission unit and the laser reception port of the reception unit, or so that the light modulation unit corresponds to the position of the laser emission port of the emission unit.

20. The laser distance measuring device with a plumb line according to claim 16, characterized in that, At least three convex parts are provided on the bottom surface of the housing of the laser distance measuring device.

Images