Laser cross instrument

Abstract

The utility model discloses a laser cross instrument which comprises a machine shell and a laser module, the laser module is arranged in the machine shell, a light outlet is formed in the outer side wall of the machine shell, light-transmitting glass is fixed in the light outlet, and the light-transmitting glass and the laser module are oppositely arranged; a laser module lens is arranged on the transmitting end face of the laser module, and reflected light formed by laser emitted by the laser module at the light-transmitting glass falls outside the area of the laser module lens. According to the utility model, the reflected light generated by the light-transmitting glass can be prevented from falling in the area range of the laser module lens and being reflected again to form a ghost image, so that the laser lines become clear, the positions of the lines can be accurately judged, and the measurement result is more accurate.

Description

Technical Field

[0001] The utility model relates to a laser cross instrument. Background Art

[0002] The laser crosshair is a tool that uses lasers to correct straightness and plays an important role in steel manufacturing, wood processing and construction.

[0003] The laser crosshair emits laser light through a laser module. Translucent glass is placed along the laser emission path to prevent dust, moisture, and other impurities from entering the instrument. The laser light is reflected as it passes through the translucent glass. In theory, the end face of the laser module and the outer translucent glass should be completely parallel. After the laser module emits the laser beam, the light is perpendicular to the translucent glass. This means that the shadow created by the reflection of the laser beam from the translucent glass will overlap with the laser beam, eliminating the shadow.

[0004] In actual assembly, the translucent glass is first installed in the mounting groove made of rubber, and then installed on the casing. However, the mounting groove will shrink during injection molding. In addition, considering the efficiency of production line installation, a gap of about 0.1-0.2mm will be left between the parts. After the translucent glass is installed on the casing and the laser module is installed on the rocker, it cannot be guaranteed that the end face of the laser module is completely parallel to the translucent glass, and a slight angle offset will occur. Since the deflection angle of the translucent glass is small, the reflected laser is very close to the emitted laser, and the reflected light will hit the cylindrical mirror at the front end of the laser module, forming a reflection again, forming the virtual image we see (see Figure 7 ), the shadow formed by the reflection will make the laser line blurred, making it difficult to accurately determine the position of the line and affecting the measurement results. Utility Model Content

[0005] The purpose of the present invention is to provide a laser crosshair to solve the technical problems mentioned in the above background technology.

[0006] The technical solution for achieving the purpose of the utility model is: a laser cross instrument, including a housing and a laser module, the laser module is arranged inside the housing, and a light outlet is opened on the outer side wall of the housing, and a transparent glass is fixed in the light outlet, and the transparent glass is arranged opposite to the laser module; the emitting end face of the laser module is provided with a laser module lens, and the reflected light formed by the laser emitted by the laser module at the transparent glass falls outside the area of ​​the laser module lens.

[0007] Furthermore, the light-transmitting glass is arranged to be inclined relative to the emission end face of the laser module.

[0008] Furthermore, the emitting end face of the laser module is provided with an emitting hole, the emitting hole is circular, and the laser module lens is provided in the emitting hole; assuming that the angle between the light-transmitting glass and the emitting end face of the laser module is a, the radius of the emitting hole is x, and the distance from the center of the emitting hole to the light-transmitting glass along the axis of the emitting hole is y,

[0009] Furthermore, it also includes a mounting groove, which is fixed at the light outlet, and the light-transmitting glass is fixed in the mounting groove.

[0010] Furthermore, the mounting groove includes a transverse groove and a vertical groove, and both the transverse groove and the vertical groove are inclined relative to the emission end surface of the laser module to form an angle.

[0011] Furthermore, the light-transmitting glass is one of crown glass, BK7 glass, B270 glass, SF2 glass, and ultra-white glass.

[0012] Furthermore, a hanger for supporting the laser module is provided in the housing, a cross axis is provided above the hanger, and the laser module is arranged in the hanger via the cross axis.

[0013] Furthermore, a counterweight is fixed below the laser module.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] (1) The utility model can prevent the reflected light generated by the transparent glass from falling into the area of ​​the laser module lens and then being reflected again to form a virtual shadow, thereby making the laser line clearer, accurately judging the position of the line, and making the measurement result more accurate.

[0016] (2) The utility model tilts the light-transmitting glass relative to the emission end face of the laser module to prevent the laser emitted by the laser module from being reflected by the light-transmitting glass and falling into the area of ​​the laser module lens, thereby forming a virtual shadow.

[0017] (3) In the present invention, the angle between the light-transmitting glass and the emitting end face of the laser module is a, the radius of the emitting hole is x, and the distance from the center of the emitting hole to the light-transmitting glass along the axis of the emitting hole is y. This ensures that the laser falls outside the area of ​​the laser module lens after being reflected by the transparent glass, and no ghost image is formed due to reflection.

[0018] (4) The transverse groove and the vertical groove of the mounting groove of the utility model are both inclined relative to the emission end face of the laser module to form an angle, so that the horizontal laser and the vertical laser emitted by the laser module fall outside the area of ​​the laser module lens after being reflected by the transparent glass.

[0019] (5) The utility model adopts glass with a lower refractive index as light-transmitting glass to improve the quality of laser imaging.

[0020] (6) A counterweight is fixed under the laser module of the present invention, which can help the laser module maintain balance and prevent the instrument from tilting or shaking due to unstable center of gravity during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0022] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0023] Figure 2 This is a schematic structural diagram of the laser module of the present invention.

[0024] Figure 3 This is a structural diagram of the installation groove and light-transmitting glass of the utility model.

[0025] Figure 4 This is a schematic structural diagram of the installation slot of the present utility model.

[0026] Figure 5 This is a structural diagram of the installation slot of the utility model from another angle.

[0027] Figure 6 This is a schematic diagram of the matching structure of the laser module and the light-transmitting glass of the present utility model.

[0028] Figure 7 This is a schematic diagram of the virtual shadow formed by the laser falling on the laser module lens area after being reflected by the transparent glass.

[0029] The numbers in the accompanying drawings are: housing 1, laser module 2, emission hole 2-1, mounting slot 3, horizontal slot 3-1, vertical slot 3-2, light-transmitting glass 4, laser module lens 5. DETAILED DESCRIPTION

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0034] In the description of the embodiments of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0036] (Example 1)

[0037] See Figure 1-6 A laser crosshair includes a housing 1 and a laser module 2. The laser module 2 is arranged inside the housing 1. A light outlet is opened on the outer wall of the housing 1. A mounting groove 3 is fixed at the light outlet. A light-transmitting glass 4 is fixed in the mounting groove 3. The light-transmitting glass 4 is arranged opposite to the laser module 2; a laser module lens 5 is provided on the emitting end face of the laser module 2. The reflected light formed by the laser emitted by the laser module 2 at the light-transmitting glass 4 falls outside the area of ​​the laser module lens 5.

[0038] For details, see Figure 1, a hanger supporting the laser module 2 is provided in the housing 1, a cross axis is provided above the hanger, and the laser module 2 is provided in the hanger through the cross axis. The laser module 2 is provided in the housing 1 through the cross axis on the hanger, and the laser module 2 itself is not fixed to the housing 1. When in use, the laser cross is placed in the designated position. If the placement point is uneven, the laser module 2 drives the cross axis to rotate through gravity, and the laser module 2 is in a vertical state when stable. As a preferred solution of this embodiment, a counterweight is fixed under the laser module 2, which can help the laser module 2 maintain balance and prevent the instrument from tilting or shaking due to unstable center of gravity during use. The laser module 2 is arranged in the housing 1 through a cross axis, which is a relatively mature technology in the industry and will not be elaborated on here.

[0039] In this embodiment, the light-transmitting glass 4 is tilted relative to the emission end face of the laser module 2 so that the laser light emitted by the laser module 2 is reflected by the light-transmitting glass 4 and falls outside the area of ​​the laser module lens 5 .

[0040] See Figure 2 The emitting end face of the laser module 2 is provided with an emitting hole 2-1, which is circular, and the laser module lens 5 is provided in the emitting hole 2-1; assuming that the angle between the light-transmitting glass 4 and the emitting end face of the laser module 2 is a, the radius of the emitting hole 2-1 is x, and the distance from the center of the emitting hole 2-1 to the light-transmitting glass 4 along the axis of the emitting hole is y, then as long as Then the reflected light formed by the laser emitted by the laser module passing through the transparent glass will fall outside the area of ​​the laser module lens, so no ghost image will be generated due to the reflected light.

[0041] See Figure 3-5 Of course, since the laser emitted by the laser cross is in a cross shape, in order to make the entire cross-shaped laser fall outside the area of ​​the laser module lens 5 after being reflected by the transparent glass 4, the entire mounting groove 3 is roughly rectangular, and the four sides of the mounting groove 3 include two horizontal grooves 3-1 and two vertical grooves 3-2. The horizontal grooves 3-1 and the vertical grooves 3-2 are both inclined relative to the emitting end face of the laser module 2 to form an angle. After the transparent glass 4 is installed, the horizontal laser and the vertical laser emitted by the laser module 2 are reflected by the transparent glass 4 and fall outside the area of ​​the laser module lens 5.

[0042] The light-transmitting glass 4 is made of any one of crown glass, BK7 glass, B270 glass, SF2 glass, etc. The light-transmitting glass 4 uses glass with a lower refractive index to improve the quality of laser imaging, or uses ultra-white glass to have better light transmission performance.

[0043] The utility model tilts the light-transmitting glass 4 relative to the emission end face of the laser module 2 to prevent the reflected light generated by the light-transmitting glass 4 from falling within the area of ​​the laser module lens 5 and then reflecting again to form a ghost image, thereby making the laser line clearer, the position of the line can be accurately determined, and the measurement result more accurate.

[0044] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A laser crosshair, characterized in that: The invention comprises a housing (1) and a laser module (2), wherein the laser module (2) is arranged inside the housing (1), a light outlet is provided on the outer wall of the housing (1), a light-transmitting glass (4) is fixed in the light outlet, and the light-transmitting glass (4) is arranged opposite to the laser module (2); a laser module lens (5) is provided on the emission end face of the laser module (2), and reflected light formed at the light-transmitting glass (4) by the laser emitted by the laser module (2) falls outside the area of ​​the laser module lens (5).

2. The laser cross according to claim 1, characterized in that: The light-transmitting glass (4) is arranged obliquely relative to the emission end face of the laser module (2).

3. The laser cross according to claim 2, characterized in that: The emitting end face of the laser module (2) is provided with an emitting hole (2-1), the emitting hole (2-1) is circular, and the laser module lens (5) is provided in the emitting hole (2-1); assuming that the angle between the light-transmitting glass (4) and the emitting end face of the laser module (2) is a, the radius of the emitting hole (2-1) is x, and the distance from the center of the emitting hole (2-1) to the light-transmitting glass (4) along the axis of the emitting hole is y, 4. The laser cross according to claim 3, characterized in that: It also includes a mounting groove (3), the mounting groove (3) is fixed at the light outlet, and the light-transmitting glass (4) is fixed in the mounting groove (3).

5. The laser cross according to claim 4, characterized in that: The mounting groove (3) comprises a transverse groove (3-1) and a vertical groove (3-2), and both the transverse groove (3-1) and the vertical groove (3-2) are arranged to be inclined relative to the emission end face of the laser module (2) to form an angle.

6. The laser crosshair according to claim 1, characterized in that: The light-transmitting glass (4) is one of crown glass, BK7 glass, B270 glass, SF2 glass and ultra-clear glass.

7. The laser cross according to claim 1, characterized in that: A hanger supporting the laser module (2) is provided in the housing (1), a cross shaft is provided above the hanger, and the laser module (2) is arranged in the hanger via the cross shaft.

8. The laser cross according to claim 7, characterized in that: A counterweight is fixed below the laser module (2).

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