Laser ranging apparatus with line projection

Abstract

A laser ranging apparatus with line projection. The laser ranging apparatus comprises a ranging module and a switching mechanism, wherein the ranging module comprises an emitting unit and a receiving unit, the emitting unit is configured to be capable of emitting a laser spot, and the receiving unit is configured to be capable of receiving reflected laser of the laser spot that is reflected by a ranging object; the switching mechanism comprises a light modulation unit, and the light 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 spot, which is emitted by the emitting unit, into a laser line; when the light modulation unit is at the first position, the emitting unit is capable of emitting the laser spot to the ranging object, and the receiving unit is capable of receiving the reflected laser that is reflected by the ranging object; and when the light modulation unit is at the second position, the light modulation unit is capable of modulating the laser spot, which is emitted by the emitting unit, into the laser line, and projecting the laser line to a line projection object.

Description

Laser ranging device with line projection TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring tools, and in particular to a laser ranging device with line projection. BACKGROUND

[0002] In the field of modern construction and decoration, the improvement of measurement accuracy and the promotion of work efficiency are important trends in the industry. Currently, there are mainly two types of measuring tools on the market: laser line projectors and laser range finders. Although these two types of products differ in function, in actual application, they are often used together to meet different measurement needs.

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

[0004] In addition, there are significant differences in technical requirements between the two tools. The range finder mainly relies on point projection 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 light source intensity. The demand for light source intensity of the line projector is generally higher than that of the range finder, which leads to the problem of mismatching of light source intensity when using the range finding function under the condition of high intensity light source, thereby affecting the accuracy of measurement.

[0005] It should also be noted that there is mutual interference 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 the measurement data has become an important challenge in current technology.

[0006] In summary, the independent modular design of the line projector and the range finder on the market has a series of problems such as large space requirement, complex assembly, mismatching of light source intensity, and functional interference, which significantly affect the user's 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

[0007] The present application aims to provide an efficient, simple and accurate measuring tool integrating the functions of line projection and distance measurement, to solve the problems of the prior art in terms of operation convenience, space utilization, light source management and functional interference, and to provide users with better measuring experience and reliability.

[0008] To achieve the above-mentioned purpose, the present application provides a laser distance measuring device with line projection, comprising a distance measuring module and a switching mechanism.

[0009] The distance measuring module comprises a transmitting unit and a receiving unit, the transmitting unit is configured to emit a laser point, and the receiving unit is configured to receive reflected laser reflected by a distance measuring object.

[0010] The switching mechanism comprises a light modulation unit, which is configured to switch between a first position and a second position, and is configured 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 distance measuring object, and the receiving unit can receive the reflected laser reflected by the distance measuring 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 to a line projection object.

[0013] Further, it further comprises a light enhancement device, which is configured to increase the power of the laser point emitted by the transmitting unit.

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

[0015] Further, the light enhancement device is started or stopped by a trigger switch.

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

[0017] Further, the non-mechanically operated switch comprises 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 at the first position, the laser ranging device is configured to implement a ranging function, the power of the laser point emitted by the emitting unit is a first power; when the light modulation unit is at the second position, the laser ranging device is configured to implement a line projection function, the power of the laser point 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 at the second position, the laser line projected by the light modulation unit includes a first reference line, the first reference line is parallel to the lateral direction of the laser ranging device or perpendicular to the lateral direction of the laser ranging device.

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

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

[0023] Further, a human-computer interaction interface is further included, the human-computer interaction interface includes a key, and the light line enhancement device is started or turned off through the key.

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

[0025] Further, a position sensor is further included, the position sensor is arranged at the laser emitting port, and the position sensor is configured to detect whether the light modulation unit is at 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 matched with the housing of the ranging module, the switching mechanism further includes an additional housing matched with the housing of the end of the ranging module, the light modulation unit is mounted on the additional housing, and the additional housing is configured to be removable from and attachable to the housing of the end of the laser ranging device.

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

[0029] Further, a slot is formed on the side wall of the housing of the distance measuring module; the support is configured to be taken out of and inserted into the slot.

[0030] Further, the support is connected to the end of the distance measuring module through a hinge shaft; the support is configured to be unfolded and folded around the hinge shaft towards the end of the distance measuring module

[0031] Further, the support is further configured to be retracted into the interior of the distance measuring module after being unfolded around the hinge shaft towards the end of the distance measuring module.

[0032] Further, the switching mechanism further comprises a knob, one end of the knob is connected with the support, and the other end of the knob is exposed on the bottom surface of the housing of the distance measuring module.

[0033] Further, the knob is configured to drive the support to translate, so that the light modulation unit deviates from the laser emitting port of the emitting unit and the laser receiving port of the receiving unit, or so that the light modulation unit corresponds to the position of the laser emitting port of the emitting unit.

[0034] Further, one end of the support is sleeved on a rotating shaft which is perpendicular to the end of the distance measuring module, one end of the knob is connected with one end of the support, and the light modulation unit is installed on the other end of the support. Further, the knob is configured to drive the support to rotate, so that the light modulation unit deviates from the laser emitting port of the emitting unit and the laser receiving port of the receiving unit, or so that the light modulation unit corresponds to the position of the laser emitting port of the emitting unit.

[0035] Further, the bottom surface of the housing of the laser distance measuring device is provided with at least three convex parts.

[0036] Compared with the prior art, the present application has the following beneficial effects:

[0037] The present application significantly reduces the volume requirement of the original equipment, simplifies the assembly process, and improves the space utilization and precision of the product. By using the switching mechanism, the point projection and line projection functions are quickly switched, the operation process is simple and convenient, and the light source intensity can be manually or automatically adjusted, meeting the different light intensity requirements of distance measurement and line projection. By setting the mutual shielding mechanism in the two functional states, the data error caused by measurement in the wrong state is prevented, the accuracy of the measurement data is ensured, energy saving is achieved, and the user experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0038] Fig. 1 is a structural schematic diagram of a laser ranging device with a projected line according to an embodiment of the present application;

[0039] Fig. 2 is a bottom view of the laser ranging device with a projected line shown in Fig. 1;

[0040] Fig. 3 is a side view of the laser ranging device with a projected line shown in Fig. 1;

[0041] Fig. 4 is a sectional view along A-A in Fig. 1;

[0042] Fig. 5 is a sectional view along B-B in Fig. 1;

[0043] Fig. 6 is a structural schematic diagram of the laser ranging device with a projected line shown in Fig. 1 with a part of the shell removed;

[0044] Fig. 7 is a structural schematic diagram of a laser ranging device with a projected line according to an embodiment of the present application;

[0045] Fig. 8 is a structural schematic diagram of a laser ranging device with a projected line according to an embodiment of the present application;

[0046] Fig. 9 is a structural schematic diagram of a laser ranging device with a projected line according to an embodiment of the present application;

[0047] Fig. 10 is a flow chart of a control method of a laser ranging device with a projected line according to an embodiment of the present application;

[0048] Fig. 11 is a structural schematic diagram of a laser ranging device with a projected line according to an embodiment of the present application with a part of the shell removed in a ranging state;

[0049] Fig. 12 is a structural schematic diagram of a laser ranging device with a projected line according to an embodiment of the present application with a part of the shell removed in a projected line state.

[0050] In the drawings: 10, ranging module; 11, emitting unit; 12, receiving unit; 13, light outlet; 14, laser emitting port; 15, laser receiving port; 16, shell; 17, slot; 18, protrusion; 20, switching mechanism; 21, light ray modulation unit; 22, trigger switch; 23, additional shell; 24, support; 25, hinged shaft; 26, knob; 27, rotating shaft; 31, light ray enhancing device; 32, button; 33, display screen. DETAILED DESCRIPTION

[0051] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0052] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature above and obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The "below", "below" and "below" of the first feature on the second feature include the first feature below and obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0053] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application.

[0055] Referring to FIGS. 1-6, the present application provides a laser ranging device with a plumb line, comprising a ranging module 10 and a switching mechanism 20.

[0056] The ranging module 10 comprises a transmitting unit 11, a receiving unit 12 and a housing 16. In the ranging mode, the transmitting unit 11 transmits a laser point, and the receiving unit 12 receives the reflected laser reflected by the ranging object, and the ranging module 10 can determine the phase delay generated by the laser once back and forth, and then convert the distance represented by the phase delay according to the wavelength of the laser.

[0057] The end of the distance measuring module 10 is provided with a light outlet 13 corresponding to the laser emitting port 14 of the emitting unit 11 and the laser receiving port 15 of the receiving unit 12. In this paper, the "end" refers to one side of the distance measuring module 10 in the length direction X.

[0058] The switching mechanism 20 includes a light modulation unit 21, which can include a cylindrical lens or a grating sheet. The light modulation unit 21 can be switched between a first position and a second position, and can modulate the laser point emitted by the emitting unit 11 into a laser line. In the distance measuring mode, when the light modulation unit 21 is at the first position, the emitting 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 at the second position, the light modulation unit 21 can modulate the laser point emitted by the emitting unit 11 into a laser line and project it to the line projection object.

[0059] In some embodiments, the laser line includes a first reference line parallel to the transverse direction of the distance measuring module 10 or perpendicular to the transverse direction of the distance measuring module 10. In this paper, the "transverse direction" refers to the width direction Y of the distance measuring module 10.

[0060] In other embodiments, the laser line includes a first reference line and a second reference line perpendicular to each other, the first reference line being parallel to the transverse direction of the distance measuring module 10, and the second reference line being perpendicular to the transverse direction of the distance measuring module 10.

[0061] In the distance measuring mode, the power requirement of the laser point emitted by the emitting unit 11 is not high. When switched 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 distance measuring device can further include a light enhancement device 31, which can increase the power of the laser point emitted by the emitting unit 11 to enhance the light intensity of the line projection.

[0062] The light enhancement device 31 can control the charging current by adjusting the pulse period and duty cycle in a pulse width modulation (PWM) manner to increase the current in the circuit, thereby increasing the power of the laser point emitted by the emitting unit 11.

[0063] The laser device needs to meet the IEC 60825 safety requirements, i.e. the laser export power < 1 mW. In the ranging mode, the laser point power emitted by the emitting 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 rays will be greatly dispersed, and the laser line power projected by the light ray modulation unit 21 will also be significantly reduced, resulting in insufficient brightness of the line projection. In this case, it is still necessary to keep the laser export power < 1 mW, which meets the IEC 60825 safety requirements, but the laser power can be further increased to improve the brightness of the line projection.

[0064] The export power of the laser point and the laser line both need to be kept < 1 mW. The requirement for the laser point is higher because the IEC 60825 light power test method involves laboratory simulation of human eye reception. In the laboratory test, a converging lens with a diameter of 7 mm is used to measure within a 7 mm convergence range. Since the energy concentration of the laser point within 7 mm is much higher than that of the laser line, and most of the energy of the laser line will be dispersed outside the 7 mm range, the actual test only evaluates the light energy within the 7 mm diameter range.

[0065] In some embodiments, the light ray enhancement device 31 can be started or turned off by triggering the switch 22. The trigger switch includes a mechanically operated switch or a non-mechanically operated switch. The non-mechanically operated switch includes a Hall switch.

[0066] In some embodiments, the trigger switch 22 can be linked with the switching mechanism 20, and when the light ray modulation unit 21 is at the first position or the second position, the switching mechanism 20 makes the trigger switch 22 act.

[0067] In some embodiments, when the light ray modulation unit 21 is at the first position, the laser ranging device realizes the ranging function, and the power of the laser point emitted by the emitting unit 11 is the first power. When the light ray modulation unit 21 is at the second position, the laser ranging device realizes the line projection function, and the power of the laser point emitted by the emitting unit 12 is the second power. The second power is greater than the first power.

[0068] In some embodiments, the ranging module 10 further includes a human-computer 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. In this paper, the "top surface" and "bottom surface" refer to the two opposite sides of the housing 16 of the ranging module 10 in the height direction Z, wherein the "top surface" is located in the direction indicated by the height direction Z arrow.

[0069] In some embodiments, the light enhancement device 21 can be activated or deactivated by the button 32. However, if the ranging function is activated in the light projection function state, it can cause inaccurate ranging results. Therefore, we set a mutual shielding mechanism between the two modes to prevent measurement in the wrong state from causing data errors and ensure the accuracy of the measurement data.

[0070] In some embodiments, the laser ranging device further comprises a position sensor arranged at the laser emitting port 14, which can detect whether the light modulation unit 21 is at 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 at the second position, the light enhancement device 21 is allowed to be activated by the button 32, so that the laser spot emitted by the emitting unit 12 has the second power.

[0071] Referring to FIG. 7, in some embodiments, a laser ranging device with light 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 reflected laser light reflected by a ranging object. The switching mechanism 20 includes a light modulation unit 21, which can 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. 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 mounted on the additional housing 23, which can be removed from and attached to the housing 16 at the end of the ranging module 10.

[0072] 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 a ranging object, and the receiving unit can receive reflected laser light 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 emitting port of the emitting unit. The light modulation unit 21 can modulate the laser spot emitted by the emitting unit into a laser line and project it to a light projection object, so that the laser ranging device realizes the light projection function. At this time, the light modulation unit 21 is at the second position.

[0073] Referring to FIG. 8, in some embodiments, a laser ranging device with a laser projection function includes a ranging module 10 and a switching mechanism 20. The ranging module 10 includes a transmitting unit, a receiving unit and a housing 16. In the ranging mode, the transmitting unit emits a laser point, and the receiving unit receives reflected laser light reflected by a ranging object. The switching mechanism 20 includes a light line modulation unit 21, which can include a cylindrical lens or a grating sheet. The light line modulation unit 21 can modulate the laser point emitted by the transmitting 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 line modulation unit 21 is installed on the bracket 24. The bracket 24 can be taken out of and inserted into the slot to drive the light line modulation unit 24 to switch between a first position and a second position. The bracket 24 can be taken out of the slot 17, and the light line modulation unit 21 is also taken out of the slot 17, so that the transmitting unit can emit a laser point to a ranging object, and the receiving unit can receive reflected laser light reflected by the ranging object, so that the laser ranging device realizes the ranging function. At this time, the light line modulation unit 21 is at the first position. The bracket 24 can also be inserted into the slot 17, and the light line modulation unit 21 is also inserted into the slot 17, so that the light line modulation unit 21 corresponds to the laser emission port position of the transmitting unit, so that the light line modulation unit 21 can modulate the laser point emitted by the transmitting unit into a laser line and project it to a projection object, so that the laser ranging device realizes the projection function. At this time, the light line modulation unit 21 is at the second position.

[0074] Referring to FIG. 9, in some embodiments, a laser ranging device with a laser line projection function comprises a ranging module 10 and a switching mechanism 20. The ranging module 10 comprises a transmitting unit, a receiving unit and a housing 16. In a ranging mode, the transmitting unit transmits a laser point, and the receiving unit receives a reflected laser reflected by a ranging object. The switching mechanism 20 comprises a light line modulation unit 21, which can comprise a cylindrical lens or a grating sheet. The light line modulation unit 21 can modulate the laser point transmitted by the transmitting unit into a laser line. The switching mechanism 20 further comprises a bracket 24, the light line modulation unit 21 is installed on the bracket 24, the bracket 24 is connected to an end of the ranging module 10 through a hinge shaft 25, and can be unfolded and folded around the hinge shaft 25 towards the end of the ranging module 10 to drive the light line modulation unit 21 to switch between a first position and a second position. The bracket 24 can be unfolded around the hinge shaft 25 away from the end of the ranging module 10, and the light line modulation unit 21 also rotates around the hinge shaft 25 away from the end of the ranging module 10, so that the transmitting unit can transmit a laser point to a ranging object, and the receiving unit can receive a reflected laser reflected by the ranging object, thereby the laser ranging device realizes a ranging function, and at this time, the light line modulation unit 21 is at the first position. The bracket 24 can also be folded around the hinge shaft 25 towards the end of the ranging module 10, and the light line modulation unit 21 also rotates around the hinge shaft 25 towards the end of the ranging module 10, so that the light line modulation unit 21 corresponds to the position of the laser emission port of the transmitting unit, thereby the laser ranging device realizes a laser line projection function, and at this time, the light line modulation unit 21 is at the second position.

[0075] Preferably, the bracket 24 can be retracted and stored in the interior of the ranging module 10 after being unfolded around the hinge shaft 25 towards the end of the ranging module 10, so as to avoid damage and wear of the light line modulation unit 21.

[0076] Referring to FIGS. 1-6, in some embodiments, a laser ranging device with a laser line projection function comprises a ranging module 10 and a switching mechanism 20.

[0077] The ranging module 10 comprises a transmitting unit 11, a receiving unit 12 and a housing 16. In a ranging mode, the transmitting unit 11 transmits a laser point, and the receiving unit 12 receives a reflected laser reflected by a ranging object. The ranging module 10 can determine a phase delay generated by a laser round trip once, and then convert the distance represented by the phase delay according to the wavelength of the laser.

[0078] An emission port 13 is arranged at the end of the ranging module 10, and the emission port 13 corresponds to the position of a laser emission port 14 of the transmitting unit 11 and a laser receiving port 15 of the receiving unit 12.

[0079] The switching mechanism 20 comprises a light ray modulation unit 21, which can comprise a cylindrical lens or a grating sheet. The light ray 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 distance measuring mode, when the light ray modulation unit 21 is at the first position, the emitting unit 11 is capable of emitting a laser spot to a distance measuring object, and the receiving unit 12 is capable of receiving the reflected laser reflected by the distance measuring object. In the line projection mode, when the light ray modulation unit 21 is at the second position, the light ray modulation unit 21 is capable of modulating the laser spot emitted by the emitting unit 11 into a laser line, and projecting to a line projection object.

[0080] In the present embodiment, the projected laser line is a "cross line", comprising a first reference line and a second reference line perpendicular to each other, the first reference line being parallel to the lateral direction of the distance measuring module 10, and the second reference line being perpendicular to the lateral direction of the distance measuring module 10.

[0081] In other embodiments, the projected laser line can also be a "horizontal line", comprising a first reference line, the first reference line being parallel to the lateral direction of the distance measuring module 10 or perpendicular to the lateral direction of the distance measuring module 10.

[0082] The switching mechanism 20 further comprises a bracket 24, the light ray modulation unit 21 is mounted on the bracket 24, and the bracket 24 drives the light ray modulation unit 21 to switch between the first position and the second position by translation.

[0083] The switching mechanism 20 further comprises a knob 26, one end of the knob 26 is connected to the bracket 24, and the other end of the knob 26 is exposed to the bottom surface of the shell 16 of the distance measuring module 10. The knob 26 can drive the bracket 24 to translate.

[0084] Now referring to FIG. 2 and FIG. 4, the knob 26 can be pulled to the right side to indicate the "distance measuring (DIST)" mode, the knob 26 drives the bracket 24 to translate so that the light ray modulation unit 21 deviates from the laser emitting port 14 of the emitting unit and the laser receiving port 15 of the receiving unit, so that the laser distance measuring device realizes the distance measuring function, at this time, the light ray modulation unit 21 is at the first position.

[0085] The knob 26 can also be pulled to the left side to indicate the "line projection (CROSS)" mode, the knob 26 drives the bracket 24 to translate so that the light ray modulation unit 21 corresponds to the position of the laser emitting port 14 of the emitting unit, so that the laser distance measuring device realizes the line projection function, at this time, the light ray modulation unit 21 is at the second position.

[0086] Referring to FIG. 4, the left side of the housing 16 of the ranging module 10 is provided with a trigger switch 22. When the knob 26 is dialled to the left side, indicating the "cross" mode, the knob 26 drives the bracket 24 to move left to the position, so that the trigger switch 22 is actuated to be turned on. When the knob 26 is dialled to the right side, indicating the "distance" mode, the knob 26 drives the bracket 24 to move right, and the trigger switch 22 is switched to be turned off. Therefore, the trigger switch 22 can be linked with the switching mechanism.

[0087] When the light modulation unit 21 is at the first position, the laser ranging device implements 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 at the second position, the laser ranging device implements the cross function, and the power of the laser spot emitted by the emitting unit 12 is the second power. The second power is greater than the first power.

[0088] When the trigger switch 22 is turned on, the laser ranging device enters the cross mode, and the light enhancement device can be started by the trigger switch 22 being turned on. At this time, the power of the laser spot emitted by the emitting unit 12 is the second power. Preferably, referring to FIGS. 2-4, the bottom surface of the housing 16 of the ranging module 10 is provided with at least three protrusions 18 protruding from the bottom surface of the housing 16 of the ranging module 10. The size of the protrusions 18 in the height direction Z is lower than the size of the knob 26, so that the laser ranging device as a whole can be placed flat.

[0089] Referring to FIG. 10, in this embodiment, a control method of a laser ranging device with a cross function includes:

[0090] Clicking the start button "ON" starts the laser ranging device;

[0091] The laser ranging device performs state detection;

[0092] Judging the state of the trigger switch:

[0093] If the trigger switch is in the off state, the laser ranging device enters the ranging mode, and the power of the laser spot emitted by the emitting unit is the first power;

[0094] Switching through the switching mechanism to actuate the trigger switch to be turned on, the laser ranging device is switched to the cross mode, and the power of the laser spot emitted by the emitting unit is the second power; clicking the shutdown button "OFF" to shut down, or pressing the start button "ON" for 5 seconds to shut down;

[0095] If the trigger switch is in the on state, the laser ranging device enters the cross mode, and the power of the laser spot emitted by the emitting unit is the second power;

[0096] The trigger switch is switched off by the switching mechanism, the laser ranging device is switched to the ranging mode, the power of the laser point emitted by the emitting unit is the first power; the laser output is turned off after 30 seconds of inaction, the device is turned off after 120 seconds of inaction, or the device is turned off by clicking the "OFF" button, or the device is turned off after 5 seconds of long-pressing the "ON" button.

[0097] In some other embodiments, the light-enhancing device 21 can also be started or turned off by the button 32.

[0098] The laser ranging device can also include a position sensor arranged at the laser emitting port 14, which can detect whether the light-enhancing device 21 is at the second position. The position sensor can include a travel switch or an inductive switch. When the position sensor detects that the light-enhancing device 21 is at the second position, the light-enhancing device 21 can be started by the button 32, so that the power of the laser point emitted by the emitting unit 12 is the second power.

[0099] In this embodiment, a control method of a laser ranging device with a projected line includes:

[0100] When initially turned on, the laser ranging device enters the ranging mode, the power of the laser point emitted by the emitting unit is the first power; only when the position sensor detects that the light-enhancing device is at the second position, the button can be switched to the projected line mode, at this time, the power of the laser point emitted by the emitting unit is the second power.

[0101] Referring to FIGS. 1, 5, 11 and 12, in some embodiments, a laser ranging device with a projected line includes a ranging module 10 and a switching mechanism 20.

[0102] The ranging module 10 includes an emitting unit 11, a receiving unit 12 and a housing 16. In the ranging mode, the emitting unit 11 emits a laser point, the receiving unit 12 receives reflected laser reflected by the ranging object, the ranging module 10 can determine the phase delay generated by the laser once back and forth, and then convert the distance represented by the phase delay according to the wavelength of the laser.

[0103] An end of the ranging module 10 is provided with a light emitting port 13, which corresponds to the laser emitting port 14 of the emitting unit 11 and the laser receiving port 15 of the receiving unit 12.

[0104] The switching mechanism 20 comprises a light line modulation unit 21, which can comprise a cylindrical lens or a grating sheet. The light line 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 distance measuring mode, when the light line modulation unit 21 is at the first position, the emitting unit 11 is capable of emitting a laser spot to a distance measuring object, and the receiving unit 12 is capable of receiving the reflected laser reflected by the distance measuring object. In the cross line projecting mode, when the light line modulation unit 21 is at the second position, the light line modulation unit 21 is capable of modulating the laser spot emitted by the emitting unit 11 into a laser line, and projecting to a cross line projecting object.

[0105] In the present embodiment, the projected laser line is a "cross line", which comprises a first reference line and a second reference line perpendicular to each other, the first reference line being parallel to the lateral direction of the distance measuring module 10, and the second reference line being perpendicular to the lateral direction of the distance measuring module 10.

[0106] In other embodiments, the projected laser line can also be a "horizontal line", which comprises a first reference line, the first reference line being parallel to the lateral direction of the distance measuring module 10 or perpendicular to the lateral direction of the distance measuring module 10.

[0107] The switching mechanism 20 further comprises a bracket 24, the light line modulation unit 21 is mounted on the bracket 24, and the bracket 24 drives the light line modulation unit 21 to rotate and switch between the first position and the second position.

[0108] The switching mechanism 20 further comprises a knob 26, one end of the knob 26 is connected with the bracket 24, and the other end of the knob 26 is exposed on the bottom surface of the shell 16 of the distance measuring module 10. The knob 26 can drive the bracket 24 to rotate.

[0109] One end of the bracket 24 is sleeved on a rotating shaft 27, the rotating shaft 27 is perpendicular to the end of the distance measuring module 10, one end of the knob 26 is connected with one end of the bracket 24, and the light line modulation unit 21 is mounted on the other end of the bracket 24.

[0110] The knob 26 can be pulled to the left side to indicate the "distance measuring (DIST)" mode, the knob 26 drives the bracket 24 to rotate around the rotating shaft 27 so that the light line modulation unit 21 deviates from the laser emitting port 14 of the emitting unit 11 and the laser receiving port 15 of the receiving unit 12, so that the laser distance measuring device realizes the distance measuring function, at this time, the light line modulation unit 21 is at the first position, as shown in FIG. 11.

[0111] The knob 26 can also be pulled to the right side to indicate the "cross line (CROSS)" mode, the knob 26 drives the bracket 24 to rotate around the rotating shaft 27 so that the light line modulation unit 21 corresponds to the position of the laser emitting port 14 of the emitting unit 11, so that the laser distance measuring device realizes the cross line projecting function, at this time, the light line modulation unit 21 is at the second position, as shown in FIG. 12.

[0112] A trigger switch 22 is arranged inside the right side of the housing 16 of the distance measuring module 10. When the knob 26 is turned to the left to indicate the "distance measuring (DIST)" mode, the knob 26 drives the support 24 to rotate clockwise to the position, so that the trigger switch 22 is actuated to be turned on. When the knob 26 is turned to the right to indicate the "cross line (CROSS)" mode, the knob 26 drives the support 24 to rotate counterclockwise, and the trigger switch 22 is switched to be turned off. Therefore, the trigger switch 22 can be linked with the switching mechanism 20.

[0113] When the light modulation unit 21 is at the first position, the laser distance measuring device realizes the distance measuring function, and the power of the laser point emitted by the emitting unit 11 is the first power. When the light modulation unit 21 is at the second position, the laser distance measuring device realizes the cross line function, and the power of the laser point emitted by the emitting unit 12 is the second power. The second power is greater than the first power.

[0114] When the trigger switch 22 is turned on, the laser distance measuring device enters the distance measuring mode, and the light enhancement device 31 can be turned off by the trigger switch 22 being turned on. At this time, the power of the laser point emitted by the emitting unit 12 is the first power.

[0115] In other embodiments, the light enhancement device 21 can also be started or turned off by the button 32.

[0116] The laser distance measuring device can further include a position sensor arranged at the laser emitting port 14. The position sensor can detect whether the light modulation unit 21 is at 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 at the second position, the light enhancement device 21 is allowed to be started by the button 32, so that the power of the laser point emitted by the emitting unit 12 is the second power.

[0117] The innovation of the present application mainly lies in:

[0118] 1. The present application integrates the distance measuring function and the cross line function in the same laser distance measuring device, and shares the laser emitting unit. Through the switching mechanism or the button input, the quick switching of the two functions is realized. Compared with the two independent module combinations on the market, the present application significantly reduces the product size, simplifies the operation, and improves the use convenience.

[0119] 2. Through the switching mechanism, including translation, rotation and folding, the conversion of the laser from point projection to line projection is realized. This design enables users to quickly and easily adjust the projection mode according to different application requirements, greatly improving the flexibility of the device.

[0120] 3、The distance measuring function and the line projection function have different requirements for the intensity of the light source, and the application sets the first and second laser powers and switches them through manual switching or linkage switching mechanism to adapt to the requirements of different function modules. In addition, the trigger switch or position sensor that can be linked is set, which can automatically adjust the intensity of the light source to save energy and ensure that the light source intensity meets the standard requirements.

[0121] 4、The application sets the mutual shielding mechanism between the distance measuring mode and the line projection mode to avoid the mutual interference between the distance measuring function and the line projection function. For example, turning on the distance measuring function in the line projection mode may cause inaccurate data, and for this reason, the position sensor is designed to prohibit switching to another mode in a certain mode, thereby preventing the user from measuring in the wrong state and ensuring the accuracy of the data.

[0122] 5、All adjustment and switching operations are designed to be simple and easy to operate, and the user can complete various function conversion and light source adjustment through simple manual operation or automatic adjustment. This design not only improves the ease of use of the equipment, but also enhances the user experience of the product.

[0123] Obviously, the above embodiments of the application are only examples for the purpose of clear illustration, and are not intended to limit the embodiments of the application. Based on the above description, those skilled in the art can make other different forms of changes or variations. It is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the claims of the application.

Claims

1. A laser range finder with a tape projection, characterized by, The laser ranging device comprises a ranging module and a switching mechanism. The ranging module comprises a transmitting unit and a receiving unit, the transmitting unit is configured to emit a laser point, and the receiving unit is configured to receive reflected laser reflected by a ranging object. The switching mechanism comprises a light line modulation unit, the light line modulation unit is configured to switch between a first position and a second position, and is configured to modulate the laser point emitted by the transmitting unit into a laser line. When the light line 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. When the light line modulation unit is at the second position, the light line modulation unit can modulate the laser point emitted by the transmitting unit into the laser line and project to a light projection object.

2. The laser range finder with a cast-in line according to claim 1, wherein, The laser ranging device further comprises a light line enhancement device, the light line enhancement device is configured to increase the power of the laser point emitted by the transmitting unit.

3. The laser range finder with a cast-in line according to claim 2, wherein, The light line enhancement device increases the power of the laser point emitted by the transmitting unit through pulse width modulation.

4. The laser range finder with a cast-in line according to claim 2, wherein, The light line enhancement device is started or stopped through a trigger switch.

5. The laser range finder with a cast-in line according to claim 4, wherein, The trigger switch comprises a mechanically operated switch or a non-mechanically operated switch.

6. The laser range finder with a cast-in line according to claim 5, wherein, The non-mechanically operated switch comprises a Hall switch.

7. The laser range finder with a cast-in line according to claim 4, wherein, When the light line modulation unit is at the first position or the second position, the switching mechanism actuates the trigger switch.

8. The laser range finder with a cast-in line according to claim 1, wherein, The light line modulation unit comprises a cylindrical lens or a grating sheet.

9. The laser range finder with a cast-in line according to claim 2, wherein, The laser ranging device further comprises a human-computer interaction interface, the human-computer interaction interface comprises a key, and the light line enhancement device is started or stopped through the key.

10. The laser range finder with a cast-in line according to claim 9, wherein, The laser ranging device further comprises a position sensor, the position sensor is arranged at the laser emitting port, and the position sensor is configured to detect whether the light line modulation unit is at the second position.

11. The laser range finder with a cast-in line according to claim 1, wherein, The switching mechanism further comprises an additional housing matched with a housing at the end of the ranging module, the light line modulation unit is mounted on the additional housing, and the additional housing is configured to be removed from and attached to the housing at the end of the laser ranging device.

12. The laser range finder with a cast-in line according to claim 1, wherein, The switching mechanism further comprises a bracket, the light line modulation unit is mounted on the bracket, and the bracket is configured to drive the light line modulation unit to switch between the first position and the second position.

13. The laser range finder with a cast-in line according to claim 12, wherein, A slot is formed on the side wall of the housing of the ranging module; the bracket is configured to be taken out of and inserted into the slot.

14. The laser range finder with a cast-in line according to claim 12, wherein, The bracket is connected to the end of the ranging module through a hinge shaft; the bracket is configured to be unfolded and folded around the hinge shaft towards the end of the ranging module.

15. The laser range finder with a cast-in line according to claim 14, wherein, The bracket is further configured to retract into the interior of the ranging module after being unfolded around the hinge shaft towards the end of the ranging module.

16. The laser range finder with a cast-in line according to claim 12, wherein, The switching mechanism further comprises a knob, one end of the knob is connected with the bracket, and the other end of the knob is exposed from the bottom surface of the housing of the ranging module.

17. The laser range finder with a cast-in line according to claim 16, wherein, The knob is configured to drive the support to translate, so that the light modulation unit deviates from the laser emission port of the emitting unit and the laser receiving port of the receiving unit, or so that the light modulation unit corresponds to the position of the laser emission port of the emitting unit.

18. The laser range finder with a cast-in line according to claim 16, wherein, One end of the support is sleeved on a rotating shaft which is perpendicular to the end of the distance measuring module, one end of the knob is connected with one end of the support, and the light modulation unit is installed on the other end of the support.

19. The laser range finder with a cast-in line according to claim 16, wherein, The knob is configured to drive the support to rotate, so that the light modulation unit deviates from the laser emission port of the emitting unit and the laser receiving port of the receiving unit, or so that the light modulation unit corresponds to the position of the laser emission port of the emitting unit.

20. The laser range finder with a cast-in line according to claim 16, wherein, The bottom surface of the shell of the laser distance measuring device is provided with at least three convex parts.

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