Laser ranging device

Abstract

The present application relates to a laser ranging device, comprising a housing portion, a first laser emitting portion, a laser receiving portion, a second laser emitting portion, and a control portion, wherein a first light output port and a second light output port are formed in the housing portion; the first laser emitting portion is configured to emit, in a first direction, first laser light to an object to be measured; the laser receiving portion is configured to receive, in the first direction, the reflected laser light reflected by said object; the second laser emitting portion is configured to emit second laser light in a second direction to form a fan-shaped laser light curtain through a second optical lens and the second light output port in sequence, the fan-shaped laser light curtain being projected to a marked object so as to form a zero line on the marked object; and the control portion is located in the housing portion, and the control portion is electrically connected to the first laser emitting portion, the laser receiving portion, and the second laser emitting portion. By means of the present application, when faced with a marked construction object that is difficult to approach, the distance between the zero position of the laser ranging device and the marked construction object that is difficult to bridge can be bridged, thereby allowing for application to more usage scenarios.

Description

Laser ranging device Technical Field

[0001] The present application relates to the field of laser ranging technology, and in particular to a laser ranging device. Background Art

[0002] A laser rangefinder is an instrument that uses a laser beam to measure distance. When distance measurement is required, press the measurement button once. The laser rangefinder will then emit a beam of laser visible to the naked eye. Use your hands or a mechanical device to control the precise pointing of the laser rangefinder until the laser spot is moved to the exact position you want to measure. Press the measurement button again. The laser rangefinder will then receive part of the laser reflected back from the object being measured, analyze the distance between the object being measured and the laser rangefinder based on the reflected laser, and display the distance digitally on the display for people to read.

[0003] However, laser distance measuring devices still present numerous inconveniences when marking. Currently, the most common marking method involves placing the laser distance measuring device as close as possible to the construction object to be marked, and then marking the area close to the laser distance measuring device's zero position. However, this method can be inconvenient in areas with complex and varied terrain and objects. For example, if the laser distance measuring device is close to the object being marked, it cannot illuminate the object, while if it can illuminate the object, it cannot be brought close to the object being marked, creating a dilemma for this marking method.

[0004] Summary of the Invention

[0005] Based on this, it is necessary to provide a laser ranging device to address the problem that the laser ranging device is inconvenient to mark.

[0006] The present application provides a laser ranging device, comprising:

[0007] A shell portion, wherein a first light outlet and a second light outlet are formed on the shell portion;

[0008] a first laser emitting unit configured to emit a first laser along a first direction toward the object to be measured; the first laser emitting unit is located within the housing, and an emitting end of the first laser emitting unit is arranged opposite to the first light outlet;

[0009] a first optical lens, mounted on the first light outlet in the housing;

[0010] a laser receiving unit configured to receive, along the first direction, a reflected laser reflected by the object to be measured; the laser receiving unit is located within the housing, and a receiving end of the laser receiving unit is disposed opposite to the first optical lens;

[0011] a second optical lens, mounted on the second light outlet in the housing;

[0012] a second laser emitting unit configured to emit a second laser in a second direction, sequentially passing through the second optical lens and the second light outlet to form a fan-shaped laser light curtain, wherein the fan-shaped laser light curtain is projected onto the object to be painted and forms a zero line on the object to be painted; the second laser emitting unit is located in the housing, and an emitting end of the second laser emitting unit is arranged opposite to the second optical lens; wherein the second direction is configured to be perpendicular to the first direction; and

[0013] The control unit is located in the shell and is electrically connected to the first laser emitting unit, the laser receiving unit, and the second laser emitting unit.

[0014] In one embodiment, two second laser emitting portions are arranged on both sides of the first laser emitting portion along the second direction.

[0015] In one embodiment, the two fan-shaped laser light curtains formed by the two second laser emitting portions are parallel.

[0016] In one embodiment, the two fan-shaped laser light curtains formed by the two second laser emitting portions are coplanar.

[0017] In one embodiment, the angular arc of the fan-shaped laser light curtain is ɑ, where 0°<ɑ<180°.

[0018] In one embodiment, the fan-shaped laser light curtain has an unfolded thickness d, wherein d is less than 5 mm.

[0019] In one embodiment, the first optical lens is an aspherical laser lens; and / or the second optical lens is a cylindrical lens.

[0020] In one embodiment, the control unit includes:

[0021] a first circuit board, wherein the first laser emitting unit, the laser receiving unit, and the second laser emitting unit are located on a first side of the first circuit board, and the first laser emitting unit, the laser receiving unit, and the second laser emitting unit are electrically connected to the first circuit board, respectively;

[0022] a second circuit board electrically connected to the first circuit board; and

[0023] A power supply is electrically connected to the first circuit board and / or the second circuit board.

[0024] In one embodiment, it further includes:

[0025] The screen display panel is electrically connected to the second side of the first circuit board, wherein the second side of the first circuit board is opposite to the first side of the first circuit board.

[0026] In one embodiment, it further includes:

[0027] A charging interface is electrically connected to the second circuit board.

[0028] In one embodiment, the housing portion comprises:

[0029] an inner frame member, wherein an outer frame of the inner frame member is connected to the first circuit board and the second circuit board respectively, and the first laser emitting unit, the laser receiving unit, the second laser emitting unit, and the power supply are all placed in the inner frame member; and

[0030] The shell component is covered outside the inner frame.

[0031] In one embodiment, the housing assembly includes:

[0032] The first shell is installed in the inner frame along the second direction.

[0033] In one embodiment, the housing assembly further comprises:

[0034] The second shell is inserted and installed in the first shell along the first direction.

[0035] In one embodiment, it further includes:

[0036] The magnetic member is installed on a wall surface of at least one of the inner frame member, the first shell and the second shell.

[0037] In one embodiment, it further includes:

[0038] The third circuit board is mounted on the side wall of the inner frame, and the third circuit board is electrically connected to the second circuit board.

[0039] In one embodiment, it further includes:

[0040] a lighting component electrically connected to the second circuit board; and

[0041] A lighting switch is electrically connected to the third circuit board.

[0042] The laser ranging device provided in the present application can determine the zero position of the laser ranging device without being close to the marked construction object. When it is difficult to get close to the marked construction object, the difficult-to-bridge distance between the zero position of the laser ranging device and the marked object can be bridged. The zero position of the laser ranging device can be determined without being close to the marked construction object, and it can be applied to more usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 shows a schematic diagram of an angular structure of a laser ranging device provided in an embodiment of the present application.

[0044] FIG2 shows another perspective structural diagram of a laser ranging device provided in an embodiment of the present application.

[0045] FIG3 shows a schematic diagram of an exploded structure of a laser ranging device provided in an embodiment of the present application at one angle.

[0046] FIG4 shows a schematic diagram of the exploded structure of the laser ranging device provided in one embodiment of the present application from another angle.

[0047] Figure numbers: 100-first laser emitting unit; 101-laser receiving unit; 102-second laser emitting unit; 103-first circuit board; 104-screen display panel; 105-second circuit board; 106-power supply component; 107-lighting component; 108-lighting switch; 109-charging interface; 110-outer shell; 1101-inner frame; 1102-first shell; 1103-second shell; 111-magnetic component; 114-third circuit board; 115-button. DETAILED DESCRIPTION

[0048] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0049] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0050] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0051] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0052] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0053] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0054] Referring to FIG. 1 , FIG. 1 illustrates a schematic diagram of the structure of a laser ranging device provided in one embodiment of the present application. A housing 110 defines a first light outlet and a second light outlet. A first laser emitting unit 100 and a laser receiving unit 101 are both located within the housing 110 and disposed at the front end of the housing 110. When the laser ranging device provided in this embodiment is used, upon first pressing button 115, the emitting end of the first laser emitting unit 100 emits a visible laser beam in a first direction. The direction of the laser ranging device can be controlled manually or mechanically. The laser beam emitted by the first laser emitting unit 100 is projected through the first light outlet onto the target location of the object to be measured. A portion of the laser beam reflected from the target location in the first direction returns to the laser receiving unit 101 through the first light outlet. Upon pressing button 115 a second time, the laser receiving unit 101 receives this portion of the reflected light and analyzes the distance between the laser ranging device and the target location of the object to be measured based on the reflected portion of the laser beam. The screen display panel 104 displays the measurement results of the first laser emitting unit 100 and the laser receiving unit 101 in the laser distance measuring device, which is convenient for users to read.

[0055] Users often not only want to obtain the measurement results of the first laser emitting unit 100 and the laser receiving unit 101, but also need to guide subsequent work by marking at a specified distance. At this time, button 115 is pressed for the third time to determine the zero position by bringing the tail of the laser ranging device close to the construction object to be marked. However, in a measurement environment with complex and changing terrain and objects, determining the zero position by bringing the tail of the laser ranging device close to the construction object to be marked requires a high degree of flatness of the construction object to be marked. If the construction object to be marked has potholes or other conditions, the determination of the zero position will be affected.

[0056] FIG2 shows another perspective structural diagram of the laser ranging device provided in one embodiment of the present application. In conjunction with FIG1 and FIG2 , FIG2 shows the rear portion of the laser ranging device. By pressing button 115 a fourth time or directly through screen display panel 104, second laser emitting unit 102 is triggered. Second laser emitting unit 102 emits a second laser in a second direction, sequentially passing through the second optical lens and the second light outlet to form a fan-shaped laser light curtain. The fan-shaped laser light curtain is projected onto the object to be marked, forming a zero line on the object. In this embodiment, the laser ranging device does not need to be as close as possible to the construction object to be marked. When the laser ranging device is difficult to approach the construction object to be marked, the originally difficult-to-bridge gap between the zero position of the laser ranging device and the construction object to be marked is bridged. Marking can be performed conveniently without being limited by terrain restrictions, making it more convenient to use.

[0057] Referring to Figures 3 and 4 , Figure 3 shows an exploded structural diagram of a laser ranging device provided in one embodiment of the present application from one angle, and Figure 4 shows an exploded structural diagram of a laser ranging device provided in one embodiment of the present application from another angle. The structure of the laser ranging device provided in this embodiment is described in detail below. The laser ranging device provided in this embodiment includes: a housing 110, a first laser emitting unit 100, a laser receiving unit 101, a second laser emitting unit 102, and a control unit. Each component is described in detail below.

[0058] The outer shell 110 is provided with a first light outlet and a second light outlet. The first light outlet is primarily used for the emission and reception of ranging laser light. The first light outlet shown in the figure, which is arranged opposite the first laser emitting unit 100, is connected to the first light outlet arranged opposite the laser receiving unit 101, serving as a single light outlet at the front end of the outer shell 110. Alternatively, the first light outlet arranged opposite the first laser emitting unit 100 and the first light outlet arranged opposite the laser receiving unit 101 may serve as two independent light outlets at the front end of the outer shell 110. The second light outlet is primarily used for the emission and reception of marking laser light. The second light outlet is arranged opposite the emitting end of the second laser emitting unit 102. The second light outlet may be provided on only one side of the outer shell 110 or on both sides. Adjustments may be made to the corresponding configuration of the second laser emitting unit 102, and no specific limitation is imposed.

[0059] The first laser emitting unit 100 is configured to emit a first laser beam toward the object to be measured along a first direction (the front-to-back direction as shown in FIG1 ); the first laser emitting unit 100 is located within the housing 110 , with the emitting end of the first laser emitting unit 100 positioned opposite the first light outlet. The specific structure of the first laser emitting unit 100 as an integrated module will not be elaborated here, but the output end of the first laser emitting unit 100 is generally equipped with an optical lens for laser emission, which may be an aspherical laser lens.

[0060] The laser receiving unit 101 is configured to receive reflected laser light from the object to be measured along the first direction. The laser receiving unit 101 is located within the housing 110, with the receiving end of the laser receiving unit 101 positioned opposite the first optical lens mounted at the first light outlet. The first optical lens may be an aspherical laser lens. Optionally, the laser receiving unit 101 and the first optical lens may be integrated into a single module via a mounting bracket.

[0061] The second laser emitting unit 102 is configured to emit a second laser along a second direction (the left-right direction as shown in FIG1 ) to sequentially pass through the second optical lens and the second light outlet to form a fan-shaped laser light curtain, and the fan-shaped laser light curtain is projected onto the object to be drawn, and forms a zero line on the object to be drawn; the second laser emitting unit 102 is located in the outer shell 110, and the emitting end of the second laser emitting unit 102 is arranged opposite to the second optical lens; wherein the second direction is configured to be a direction perpendicular to the first direction. Here, the second optical lens can be a cylindrical lens. Optionally, the second laser emitting unit 102 and the second optical lens can be integrated into an integrated module by a mounting bracket.

[0062] The control unit is located in the housing 110 and is electrically connected to the first laser emitting unit 100 , the laser receiving unit 101 , and the second laser emitting unit 102 .

[0063] In one embodiment of the present application, the second laser emitting unit 102 is located at the rear side of the first laser emitting unit 100 (or laser receiving unit 101). One of the second laser emitting units 102 can be arranged on the left or right side of the first laser emitting unit 100 (or laser receiving unit 101). The second laser emitting unit 102 can project a fan-shaped laser light curtain, which generates a visible zero line on the object being marked after being projected onto the object being marked. When the laser ranging device is difficult to get close to the construction object being marked, the originally difficult-to-bridge gap between the zero position of the laser ranging device and the construction object being marked is bridged, and marking can be conveniently performed without being limited by terrain restrictions, making it more convenient to use.

[0064] In one embodiment of the present application, two second laser emitting units 102 are located behind the first laser emitting unit 100 (or laser receiving unit 101). The two second laser emitting units 102 can be arranged simultaneously on the left and right sides of the first laser emitting unit 100 (or laser receiving unit 101). The two second laser emitting units 102 can form two fan-shaped laser light curtains to the left and right along the second direction, respectively. This embodiment can mark objects to be marked on both sides of the laser ranging device at the same time, or can choose to mark only the left or right side of the objects to be marked as needed. This embodiment is not only applicable to more complex ranging environments, but also improves marking efficiency.

[0065] Optionally, the two fan-shaped laser light curtains formed by the two second laser emitting units 102 are parallel to each other, and the two second light outlets are offset from each other and opened on the left and right sides of the outer shell 110 .

[0066] Optionally, the two fan-shaped laser light curtains formed by the two second laser emitting units 102 are coplanar, and the two second light outlets are oppositely positioned on the left and right sides of the outer shell 110 .

[0067] The following briefly describes the fan-shaped laser light curtain. The fan-shaped laser light curtain can have an angular arc of ɑ, where 0° < ɑ < 180°. The fan-shaped laser light curtain can have an unfolded thickness of d, where d < 5 mm.

[0068] In an optional embodiment, the control unit includes: a first circuit board 103, a second circuit board 105, and a power supply 106. The first circuit board 103, the second circuit board 105, and the power supply 106 are described in detail below.

[0069] The first circuit board 103 is used for distance measurement operations and screen display control. In an optional embodiment, the first circuit board 103 includes a photoelectric conversion module and a control module. The photoelectric conversion module can be used to capture the optical signal of a portion of the laser beam reflected from the target position of the object to be measured, or to capture the optical signal of the entire laser beam reflected, and convert the captured optical signal of the reflected beam into at least one feedback electrical signal. The control module is used to obtain the feedback electrical signal and determine the distance between the laser receiving unit 101 and the target position of the object to be measured. The control module is electrically connected to the screen display panel 104, which can display the distance between the laser receiving unit 101 and the target position of the object to be measured, that is, the distance measurement results of the laser ranging device can be displayed on the screen display panel 104. The screen display panel 104 is located above the first circuit board 103 and is electrically connected to the first circuit board 103. The first laser emitting unit 100 , the laser receiving unit 101 and the second laser emitting unit 102 are located below the first circuit board 103 , and the first laser emitting unit 100 , the laser receiving unit 101 and the second laser emitting unit 102 are electrically connected to the first circuit board 103 , respectively.

[0070] The second circuit board 105 is electrically connected to the first circuit board 103. The second circuit board serves as a sub-board and is mainly used to integrate other functional components except ranging, such as button 115, power supply 106, lighting component 107, etc.

[0071] The power supply 106 is installed at the lower part of the second circuit board 105. The power supply 106 can be electrically connected to the first circuit board 103, the power supply 106 can also be electrically connected to the second circuit board 105, or the power supply 106 can be electrically connected to the first circuit board 103 and the second circuit board 105 at the same time.

[0072] It should be noted here that the first circuit board 103, the second circuit board 103 and the third circuit board 103 can maintain a direct or indirect connection relationship according to the device setting requirements, and are not limited to the above-mentioned connection method. Other circuit board layout methods that can be known to technical personnel in this field can be applied, and they will not be listed one by one here.

[0073] In an alternative embodiment, the button 115 is electrically connected to the second circuit board 105. To facilitate assembly, the button 115 is electrically connected to the upper side of the second circuit board 105. During use, the laser distance measuring device can switch between different measurement modes by pressing a button, which helps to simplify the overall structure.

[0074] In an optional embodiment, the laser ranging device further includes a third circuit board 114. Third circuit board 114 is primarily configured as a keypad with a relatively simple function. Third circuit board 114 is mounted on a side wall of inner frame 1101 and is electrically connected to second circuit board 105.

[0075] In an optional embodiment, an illuminating element 107 is located at the rear end of the laser ranging device. This facilitates accurate understanding of the actual environment of the construction object to be marked when determining the zero position by placing the rear end of the laser ranging device close to the construction object to be marked. It also allows the user to record and process distance measurement results at any time. The illuminating element 107 is electrically connected to the second circuit board 105, and the illuminating switch 108 is electrically connected to the third circuit board 114. The illuminating element 107 and the illuminating switch 108 are located on the left and right sides of the laser ranging device. The illuminating element 107 is turned on and off by pressing the illuminating switch 108. Illuminating the environment surrounding the laser ranging device, particularly the environment surrounding the rear end of the laser ranging device, helps ensure measurement accuracy and the accuracy of the results.

[0076] In an optional embodiment, the laser distance measuring device further includes a charging interface 109. The charging interface 109 is electrically connected to the charging circuit on the second circuit board 105, and is used to provide a charging function for the laser distance measuring device.

[0077] In an optional embodiment, the laser distance measuring device further includes an external device interface, wherein the external device interface is electrically connected to the charging circuit on the second circuit board 105 .

[0078] In an optional embodiment, the outer shell 110 includes an inner frame 1101 and a shell assembly.

[0079] The outer frame of the inner frame 1101 is connected to the first circuit board 103 and the second circuit board 105, respectively, and the first laser emitting unit 100, the laser receiving unit 101, the second laser emitting unit 102, and the power supply 106 are all placed within the inner frame 1101. The inner frame 1101 is primarily used to support the integrated device consisting of the first circuit board 103, the second circuit board 105, the first laser emitting unit 100, the laser receiving unit 101, the second laser emitting unit 102, and the power supply 106. Specifically, the power supply 106 enters the inner cavity of the inner frame 1101 through the top opening of the inner frame 1101. Generally, a special pit can be reserved in the inner cavity of the inner frame 1101 for placing the power supply, where the power supply can be fixed to the inner frame 1101 using adhesive.

[0080] The shell assembly cover is arranged outside the inner frame 1101, and the third circuit board is installed on the shell assembly. The shell assembly is provided with a plurality of forming holes, and the position of each forming hole corresponds to the position of the button on the third circuit board, the emitting end of the second laser emitting unit 102 and the charging interface 109.

[0081] In one embodiment, the housing assembly includes a first housing 1102. An inner frame member 1101 is pushed into the first housing 1102 along a second direction from a sidewall of the first housing 1102. A third circuit board 103 is mounted on a sidewall of the first housing 1102. A button 115 extends outside the first housing 1102. A screen display panel 104 is mounted on the upper wall of the first housing 1102.

[0082] In one embodiment, the shell assembly includes a first shell 1102 and a second shell 1103. The inner frame 1101 is pushed into the first shell 1102 along the second direction from the side wall of the first shell 1102, and the first shell 1102 is pushed into the second shell 1103 along the first direction from the rear side of the second shell 1103. The third circuit board 103 is mounted on the side wall of the first shell 1102. The button 115 extends out of the first shell 1102. The screen display panel 104 is mounted on the upper wall of the first shell 1102. As can be seen from the reference figure, a plurality of formed holes are opened on the second shell 1103, and the position of each formed hole corresponds to the position of the button on the third circuit board, the emitting end of the second laser emitting unit 102 and the charging interface 109.

[0083] The assembly method between the inner frame 1101, the first shell 1102 and the second shell 1103 is not limited to the above-mentioned installation method. For example, the inner frame 1101 and the first shell 1102, and the first shell 1102 and the second shell 1103 are assembled by a side push-in method; for another example, the inner frame 1101 and the first shell 1102, and the first shell 1102 and the second shell 1103 are assembled by a front-back push-in method. These examples are not listed here one by one.

[0084] In one embodiment, the laser distance measuring device further includes a magnetic member 111 . The magnetic member 111 is installed on a wall surface of at least one of the inner frame 1101 , the first housing 1102 , and the second housing 1103 .

[0085] In an optional embodiment, the magnetic component 111 is installed on the inner cavity side wall of the inner frame component 1101, and the laser ranging device is adsorbed to a fixed position (such as an iron frame, etc.) by magnetic attraction, eliminating the need to rely on a handheld laser ranging device or a mechanical control device to support the laser ranging device.

[0086] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A laser distance measuring device, characterized in that: include: A shell portion (110), wherein a first light outlet and a second light outlet are provided on the shell portion (110); A first laser emitting unit (100) is configured to emit a first laser to an object to be measured along a first direction; the first laser emitting unit (100) is located in the housing (110), and an emitting end of the first laser emitting unit (100) is arranged opposite to the first light outlet; A first optical lens, mounted on the first light outlet in the outer shell (110); A laser receiving unit (101) is configured to receive reflected laser light reflected by the object to be measured along the first direction; the laser receiving unit (101) is located in the housing (110), and a receiving end of the laser receiving unit (101) is arranged opposite to the first optical lens; A second optical lens, mounted on the second light outlet in the outer shell (110); The second laser emitting unit (102) is configured to emit a second laser in a second direction to sequentially pass through the second optical lens and the second light outlet to form a fan-shaped laser light curtain, and the fan-shaped laser light curtain is projected onto the object to be drawn and forms a zero line on the object to be drawn; the second laser emitting unit (102) is located in the housing (110), and the emitting end of the second laser emitting unit (102) is arranged opposite to the second optical lens; wherein the second direction is configured to be a direction perpendicular to the first direction; and A control unit is located in the housing (110), and the control unit is electrically connected to the first laser emitting unit (100), the laser receiving unit (101), and the second laser emitting unit (102).

2. The laser distance measuring device according to claim 1, characterized in that: The two second laser emitting parts (102) are arranged on both sides of the first laser emitting part (100) along the second direction.

3. The laser distance measuring device according to claim 2, characterized in that: The two fan-shaped laser light curtains formed by the two second laser emitting units (102) are parallel.

4. The laser distance measuring device according to claim 2, characterized in that: The two fan-shaped laser light curtains formed by the two second laser emitting parts (102) are coplanar.

5. The laser distance measuring device according to claim 1, characterized in that: The angular arc of the fan-shaped laser light curtain is ɑ, wherein 0°<ɑ<180°.

6. The laser distance measuring device according to claim 1, characterized in that: The unfolded thickness d of the fan-shaped laser light curtain is, wherein d<5 mm.

7. The laser distance measuring device according to claim 1, characterized in that: The first optical lens is an aspherical laser lens; and / or the second optical lens is a cylindrical lens.

8. The laser distance measuring device according to claim 1, characterized in that: The control unit includes: A first circuit board (103), wherein the first laser emitting unit (100), the laser receiving unit (101) and the second laser emitting unit (102) are located on a first side of the first circuit board (103), and the first laser emitting unit (100), the laser receiving unit (101) and the second laser emitting unit (102) are electrically connected to the first circuit board (103) respectively; a second circuit board (105), electrically connected to the first circuit board (103); and A power supply (106) is electrically connected to the first circuit board (103) and / or the second circuit board (105).

9. The laser distance measuring device according to claim 8, characterized in that: Also includes: The screen display panel (104) is electrically connected to the second side of the first circuit board (103), wherein the second side of the first circuit board (103) is opposite to the first side of the first circuit board (103).

10. The laser distance measuring device according to claim 8, characterized in that: Also includes: A charging interface (109) is electrically connected to the second circuit board (105).

11. The laser distance measuring device according to claim 8, characterized in that: The housing (110) comprises: an inner frame member (1101), wherein an outer frame of the inner frame member (1101) is respectively connected to the first circuit board (103) and the second circuit board (105), and the first laser emitting unit (100), the laser receiving unit (101), the second laser emitting unit (102) and the power supply unit (106) are all placed in the inner frame member (1101); and The shell component is covered outside the inner frame (1101).

12. The laser distance measuring device according to claim 11, characterized in that: The housing assembly comprises: A first shell (1102), wherein the inner frame member (1101) is inserted and installed in the first shell (1102) along the second direction.

13. The laser distance measuring device according to claim 12, characterized in that: The housing assembly further comprises: The second shell (1103), the first shell (1102) is inserted and installed in the second shell (1103) along the first direction.

14. The laser distance measuring device according to claim 13, characterized in that: Also includes: The magnetic member (111) is installed on the wall surface of at least one of the inner frame member (1101), the first shell (1102) and the second shell (1103).

15. The laser distance measuring device according to claim 11, characterized in that: Also includes: A third circuit board (114) is mounted on the side wall of the inner frame (1101), and the third circuit board (114) is electrically connected to the second circuit board (105).

16. The laser distance measuring device according to claim 15, characterized in that: Also includes: A lighting element (107) electrically connected to the second circuit board (105); as well as The lighting switch (108) is electrically connected to the third circuit board (114).

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