Laser line module structure

Abstract

The invention relates to the technical field of laser measurement, and particularly provides a laser line module structure which comprises a shell, the interior of the shell is hollow, a lens base, a collimating lens group and a laser tube group are sequentially mounted in the shell from head to tail, a first mounting hole is formed in the inner side of the upper head of the shell, and the lens base is in interference fit in the first mounting hole; and the periphery of the tail part of the lens seat is provided with a spherical surface, so that the lens seat can rotate in the first mounting hole by taking the circle center of the spherical surface at the periphery of the lens seat as a rotating center, and the axial angle of the lens seat can be adjusted only by applying an adjusting force on the lens seat, thereby ensuring that the axis of the cylindrical lens in the lens seat is vertical to a collimated laser beam emitted by the collimating lens group. And when the angle of the mirror base is adjusted, the interference fit enables the mirror base to have expansion friction force in the rotating process, so that the stability of the adjustment precision of the mirror base can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of laser measurement, and in particular to a laser line module structure. Background Art

[0002] A laser line projector is a measuring instrument commonly used in construction and house decoration. It generally refers to a device that can emit vertical or horizontal visible lasers and is used to mark horizontal or vertical lines on the target surface. The laser module is the core component of the laser line projector. It is generally composed of a laser generator, optical elements, mechanical structure, and drive circuit.

[0003] The existing laser line module is provided with a laser point light source assembly, a shell, a cylindrical mirror, and two or four linear precision adjustment screws. The point light source assembly is arranged in the central mounting hole at the rear of the shell, and the cylindrical mirror is installed in the radial hole of the cylinder at the front end of the shell. A pair of saw slots are arranged behind the cylindrical mirror mounting hole of the shell, and the saw slots are connected with two or four adjustment threaded holes for precision adjustment.

[0004] However, the adjustment structure of a pair of saw grooves plus two or four top screws is used to adjust the position relationship of the cylindrical mirror installed on the module head relative to the optical axis. The structure is complicated. In addition, due to the small size of the screws and the high size requirements of the hexagonal holes that match the adjusting screwdriver, insertion and extraction will affect the accuracy. Automatic equipment cannot achieve precise adjustment. In addition, the equipment for automatic adjustment of traditional module structures is complex, requires large investment, and has a low pass rate. Summary of the invention

[0005] Based on this, it is necessary to provide a laser line module structure to address the problem that the current laser line module has low accuracy and is not easy to adjust when adjusting the cylindrical mirror.

[0006] The above purpose is achieved through the following technical solutions: A laser line module structure comprises a shell, the interior of the shell is hollow, and a mirror seat, a collimating lens group and a laser tube group are sequentially installed inside the shell from beginning to end; The laser tube group is arranged at the rear of the housing, and the laser tube group can generate divergent lasers in the housing; The collimating lens group is installed in the middle of the housing, and an aperture hole is provided in the housing. The aperture hole is located between the collimating lens group and the laser tube group. The divergent laser passes through the aperture hole and directly irradiates the collimating lens group. The collimating lens group can form a collimated laser beam from the divergent laser. The mirror seat has a cylindrical mirror arranged along its radial direction, and the collimated laser beam is irradiated on the cylindrical mirror to form a laser plane light curtain. The outer periphery of the tail of the mirror seat has a spherical surface, and the spherical surface is interference fit with the inner side of the shell head. The mirror seat can rotate axially with the center of the spherical surface as the rotation center to adjust the cylindrical mirror to be perpendicular to the optical axis of the collimated laser beam.

[0007] Furthermore, the outer periphery of the rear portion of the mirror holder has a first surface and a second surface along its axial direction, the first surface is located in front of the second surface, the first surface is cylindrical, the second surface is spherical, the diameter of the first surface is smaller than the diameter of the second surface, and a first mounting hole is provided on the inner side of the shell head, the front inner wall diameter of the first mounting hole is larger than the rear inner wall diameter, and the diameters of the first surface and the second surface are both smaller than the front inner wall diameter of the first mounting hole.

[0008] Furthermore, a second mounting hole is opened in the mirror base along its radial direction, and the cylindrical mirror is inserted into the second mounting hole.

[0009] Furthermore, a U-shaped groove corresponding to the axial ends of the second mounting hole is provided on the side wall of the first mounting hole, and the size of the U-shaped groove is larger than the second mounting hole. A glue spot hole is opened on the side wall of the first mounting hole at a position perpendicular to the axis of the second mounting hole. Glue is filled in the glue spot hole and at the junction of the U-shaped groove and the mirror seat to fix the mirror seat in the first mounting hole.

[0010] Furthermore, the rotation center of the mirror base is concentric with the center of the first mounting hole and exceeds the cross section of the shell where the bottom of the U-shaped groove is located.

[0011] Furthermore, a lens group mounting groove is provided in the shell, one end of the collimating lens group abuts against the bottom of the lens group mounting groove, and a pressing assembly is provided at the end of the lens group mounting groove, and the pressing assembly can abut against the collimating lens group to position the collimating lens group in the lens group mounting groove.

[0012] Furthermore, the pressing assembly is an elastic rubber ring, which is elastic, abuts against the rear of the lens holder, and the other end of the elastic rubber ring abuts against the collimating lens group.

[0013] Furthermore, the second surface of the mirror seat includes a first split body and a second split body, the first split body and the second split body are coaxial and can move axially relative to each other, an elastic ring is arranged between the first split body and the second split body, and two end faces of the elastic ring respectively abut the first split body and the second split body.

[0014] Furthermore, the elastic ring is hollow inside, and can reduce its deformation when the air pressure outside the elastic ring is greater than the air pressure inside the elastic ring, and the first split body and the second split body are close to each other; The elastic ring expands and deforms when the air pressure outside is lower than the air pressure inside. The elastic ring pushes the first split body and the second split body away from each other, and the outer peripheries of the first split body and the second split body abut against the inner side of the shell head.

[0015] Furthermore, the laser tube assembly is interference-fittedly arranged on the inner side of the rear portion of the housing.

[0016] The beneficial effects of the present invention are: The present invention achieves interference fit between the mirror seat and the first mounting hole, and the outer periphery of the rear portion of the mirror seat has a spherical surface, so that the mirror seat can rotate in the first mounting hole with the center of the spherical surface of the outer periphery of the mirror seat as the center. The axial angle of the mirror seat can be adjusted by applying an adjustment force on the mirror seat, thereby ensuring that the axis of the cylindrical mirror in the mirror seat is perpendicular to the optical axis of the collimated laser beam emitted by the collimating lens group. When adjusting the axial angle of the mirror seat, the interference fit makes it necessary to overcome the expansion friction force during the rotation of the mirror seat. After the precision adjustment is completed, the expansion friction force causes the cylindrical mirror group to be initially positioned.

[0017] The present invention provides a lens group mounting groove in a shell, and provides a pressing assembly on the lens group mounting groove. The pressing assembly can position the collimating lens group in the lens group mounting groove. When the pressing assembly is an elastic rubber ring, the elastic rubber ring is close to one end of the first mounting hole. When the lens holder is installed, the elastic rubber ring can be pushed, so that the elastic rubber ring can be pushed onto the collimating lens group and the collimating lens group can be positioned in the lens group mounting groove.

[0018] The present invention arranges the first sub-body, the second sub-body and the elastic ring at the second surface position of the rear part of the mirror seat, so that the elastic ring can be deformed to push the first sub-body and the second sub-body towards or away from each other, and when the mirror seat is installed, it is in a high-pressure environment so that the elastic ring shrinks inward, so that the first sub-body and the second sub-body are close to each other, thereby making it easier for the mirror seat to be interference fit, and can reduce the friction force applied when adjusting the mirror seat, so that a smaller adjustment force can be used. When the mirror seat is adjusted and fixed and is in a normal pressure state, the elastic ring resets to push the first sub-body and the second sub-body, thereby further enhancing the connection strength between the mirror seat and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a laser line module provided in the first embodiment of the present invention; Figure 2 for Figure 1 An exploded view of the laser line module structure provided in the first embodiment; Figure 3 for Figure 1A front view of the laser line module structure provided in the first embodiment; Figure 4 for Figure 3 A cross-sectional view of the laser line module structure along AA provided in the first embodiment; Figure 5 for Figure 1 A top view of the laser line module structure provided in the first embodiment; Figure 6 for Figure 5 A cross-sectional view of the laser line module structure along BB provided in the first embodiment; Figure 7 A schematic diagram of the internal structure of a laser line module structure provided in a second embodiment of the present invention; Figure 8 A schematic diagram of a laser line module structure provided by a third embodiment of the present invention; Fig. 9 for Figure 8 A cross-sectional view of the laser line module structure along CC provided in the third embodiment; Fig.10 A schematic structural diagram of a laser line module structure from another angle provided in the third embodiment of the present invention; Fig.11 for Fig.10 A cross-sectional view of the laser line module structure along DD provided in the third embodiment; Fig.12 A cross-sectional view of a laser line module structure provided in the third embodiment of the present invention.

[0020] in: 100, mirror base; 110, cylindrical mirror; 120, elastic rubber ring; 130, collimating lens group; 140, housing; 150, laser tube group; 151, laser tube fittings; 152, laser tube base; 153, PCB drive circuit; 154, wire; 160, pressing ring; 200, first mounting hole; 210, lens assembly mounting groove; 220, aperture hole; 230, second mounting hole; 240, U-shaped groove; 250, glue dispensing hole; 260, third mounting hole; 270, module positioning force surface; 300, first surface; 310, second surface; 320, first sub-body; 321, groove; 330, second sub-body; 331, convex ring; 340, elastic ring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] Refer to the following Figure 1-Figure 12 To describe a laser line module structure provided by the present invention.

[0025] A laser line module structure includes a housing 140, wherein the housing 140 is hollow, and a lens holder 100, a collimating lens group 130 and a laser tube group 150 are sequentially installed inside the housing 140 from beginning to end. Figure 1 , Figure 2 and Figure 3As shown, the laser tube assembly 150 is installed at the rear of the housing 140. The laser tube assembly 150 can generate divergent laser light in the housing 140. The collimating lens assembly 130 is installed in the middle of the housing 140. An aperture hole 220 is provided inside the housing 140. The aperture hole 220 is specifically located between the collimating lens assembly 130 and the laser tube assembly 150. Therefore, the divergent laser light emitted by the laser tube assembly 150 can pass through the aperture hole 220. After passing through the aperture hole 220, the divergent laser light can be projected. The collimated laser beam is directed onto the collimating lens group 130, and the divergent laser beam can be formed into a collimated laser beam by focusing the collimating lens group 130. The collimated laser beam is directed toward the head of the shell 140. The mirror base 100 is located in the head of the shell 140. The mirror base 100 is cylindrical, and has a cylindrical mirror 110 radially arranged therein. The collimated laser beam is directed toward the outer periphery of the cylindrical mirror 110. The collimated laser beam is transmitted, refracted and reflected by the cylindrical mirror 110 to form a laser plane light curtain, that is, a laser line.

[0026] It should be noted that the mirror base 100 of the present invention is interference fit on the shell 140, and the outer periphery of the tail of the mirror base 100 has a spherical surface, the center of the spherical surface is located on the axis of the mirror base 100, and the outer periphery of the spherical surface is interference fit with the inner wall of the head of the shell 140. Through the setting of the spherical surface, the mirror base 100 can also be slightly axially rotated with the center of the spherical surface as the rotation center when it is interference fit in the shell 140, so as to adjust the axial angle of the mirror base 100. Since the cylindrical mirror 110 is installed on the mirror base 100, adjusting the angle of the mirror base 100 is to adjust the angle of the cylindrical mirror 110, so as to ensure that the axis of the cylindrical mirror 110 can be perpendicular to the axis of the shell 140, that is, to make the collimated laser beam emitted from the collimating lens group 130 perpendicular to the axis of the cylindrical mirror 110, thereby ensuring that the cylindrical mirror 110 can generate high-precision laser lines.

[0027] The present invention adopts the interference fit of the mirror base 100 in the housing 140, so that the mirror base 100 can be stably positioned in the housing 140, thereby improving the stability of the mirror base 100, and the cylindrical mirror 110 is installed in the mirror base 100, and the angle of the cylindrical mirror 110 is indirectly adjusted by adjusting the axial angle of the mirror base 100. Due to the interference fit, the adjustment process has high accuracy, and the position can be stably positioned after the adjustment is completed. For example, if two or four top screws in the prior art are used to adjust the angle of the cylindrical mirror 110, the adjustment accuracy is low, and the operator needs to adjust repeatedly, and the adjustment efficiency is not high. However, the present invention The present invention only needs to apply an adjustment force on the mirror base 100, that is, on both sides of the installation position of the cylindrical mirror 110, to adjust the axial angle of the mirror base 100, and then adjust the angle of the cylindrical mirror 110, which is convenient and quick. At the same time, the use of interference fit can enable the laser line module structure to be automatically assembled and debugged, that is, the assembly of the collimating lens group 130 can be automated, the optical focusing can be automated, and the installation and adjustment of the cylindrical mirror 110 can be automated. Compared with the four screws and a pair of saw seams of the traditional laser line module, the present invention does not use a screw for adjustment, thereby avoiding the generation of screw adjustment stress.

[0028] It should be noted that the laser line module structure needs to be positioned when used. The middle and rear part of the shell 140 is the clamping part of the laser line module structure, and a module positioning force surface 270 is provided on the shell 140. The module positioning force surface 270 is the force surface of the adjustment screw when adjusting the positioning laser line position when the laser line module structure is applied to the laser line projector. Generally, there are 2, 4 or 8 screws. There are many structural shapes of the module clamping part, which are not specifically limited here.

[0029] Specifically, Figure 4As shown, the outer periphery of the mirror holder 100 in the embodiment of the present invention has a first surface 300 and a second surface 310, the first surface 300 is a cylindrical surface and is the front half of the mirror holder 100, and the second surface 310 is a spherical surface, the diameter of the first surface 300 is smaller than the diameter of the second surface 310, and the first surface 300 is located at the front side of the second surface 310, and a first mounting hole 200 is arranged on the inner side of the head of the shell 140, the front inner wall diameter of the first mounting hole 200 is larger than the rear inner wall diameter of the first mounting hole 200, and the diameter of the first surface 300 and the diameter of the second surface 310 are both smaller than the front inner wall diameter of the first mounting hole 200, during the installation of the mirror holder 100, the mirror holder The second surface 310 of 100 first passes through the front side of the first mounting hole 200, and then passes through the rear side of the first mounting hole 200, while the first surface 300 only passes through the inner wall of the front side of the first mounting hole 200, and the diameter of the first surface 300 is smaller than the diameter of the inner wall of the front side of the first mounting hole 200, so that there is a gap between the front side of the first mounting hole 200 and the first surface 300, providing space for the axial rotation of the mirror holder 100, and the second surface 310 of the mirror holder 100 can be preliminarily positioned at the front side of the first mounting hole 200. After the mirror holder 100 is subjected to a thrust, the second surface 310 is pressed onto the rear side of the first mounting hole 200, and the second surface 310 is tightly matched with the inner wall of the rear side of the first mounting hole 200.

[0030] More specifically, the mirror base 100 in this embodiment is provided with a second mounting hole 230, and the second mounting hole 230 penetrates along the radial direction of the mirror base 100. Figure 6 As shown, the mirror holder 100 is provided with a light exit hole and a light entrance hole in the axial direction, that is, the right side of the second mounting hole 230 is the light entrance hole, and the left side is the light exit hole, and the cylindrical mirror 110 is slidably inserted in the second mounting hole 230, and the collimated laser beam emitted from the collimating lens group 130 is emitted toward the cylindrical mirror 110 through the light entrance hole, and the collimated laser beam is transmitted, reflected and refracted by the cylindrical mirror 110 to generate a high-precision laser line, and the laser line is emitted from the light exit hole on the left. After the cylindrical mirror 110 is installed in the second mounting hole 230, glue needs to be applied at the axial ends of the second mounting hole 230 to fix the cylindrical mirror 110 in the second mounting hole 230.

[0031] To facilitate adjustment of the axial angle of the mirror holder 100, a U-shaped groove 240 corresponding to the axial ends of the second mounting hole 230 is provided at the head position of the shell 140, that is, on the side wall of the first mounting hole 200. The size of the U-shaped groove 240 is larger than the second mounting hole 230, thereby facilitating the installation of the cylindrical mirror 110. When the mirror holder 100 is installed in the first mounting hole 200, a part of the mirror holder 100 can be observed through the U-shaped groove 240. At this time, the cylindrical mirror 110 is inserted into the second mounting hole 230 through the U-shaped groove 240 and fixed with glue. Then the operator can control the robot arm or other structure to pass through the U-shaped groove 240 to abut against the edge of the two side holes of the second mounting hole 230 of the mirror holder 100. When the mirror holder 100 is subjected to a force, it can start axial rotation with the spherical center of the second surface 310 as the rotation center, thereby adjusting the axis of the cylindrical mirror 110 to be perpendicular to the collimated laser beam. To facilitate the fixation of the mirror base 100, a glue hole 250 is opened on the side wall of the first mounting hole 200 at a position perpendicular to the axis of the second mounting hole 230. After glue is dispensed in the glue hole 250, the mirror base 100 can be fixed in the first mounting hole 200. Therefore, it is necessary to adjust the angle of the mirror base 100 before glue is dispensed, and finally glue is dispensed in the glue hole 250 to fix the position of the mirror base 100.

[0032] It should be noted that glue can also be dispensed at the position of the U-shaped groove 240 to further connect the lens holder 100 to the housing 140. The glue in the glue dispensing hole 250 and the glue at the position of the U-shaped groove 240 in the present invention can be quick-drying glue, anaerobic glue or epoxy glue, so that the lens holder 100 can be fixed in the first mounting hole 200. Of course, other glues can also be used, which are not specifically limited here.

[0033] It can be understood that the U-shaped groove 240 in the present invention not only facilitates the positioning and installation of the mirror base 100, the precision adjustment of the mirror base 100 and the installation of the cylindrical mirror 110, but also facilitates the rework of defective products. The cylindrical mirror 110 can be taken out through the U-shaped groove 240, and after the cylindrical mirror 110 is taken out, a through rod (not shown in the figure) can be inserted into the second mounting hole 230, so that the mirror base 100 can be pulled out through the through rod, which facilitates disassembly and reduces the rework cost.

[0034] In this embodiment, the rotation center of the mirror base 100 of the present invention is concentric with the center of the first mounting hole 200, the rotation center of the mirror base 100 is close to the middle position of the shell 140, and the rotation center passes through the cross section where the bottom of the U-shaped groove 240 is located, that is, the spherical center of the second surface 310 on the mirror base 100 is close to the middle position of the shell 140 and passes through the bottom of the U-shaped groove 240. Figure 3 and Figure 4As shown, the rotation center of the mirror base 100 is located on the right side of the bottom cross section of the U-shaped groove 240. The purpose of this arrangement is to enable the mirror base 100 to rotate in the first mounting hole 200 with the spherical center of the second surface 310 as the fulcrum, and to have a force arm between the force points on both sides of the second mounting hole 230 of the mirror base 100, so that the axial angle of the mirror base 100 can be adjusted. If the rotation center of the mirror base 100 does not exceed the cross section where the bottom of the U-shaped groove 240 is located, the second surface 310 of the mirror base 100 will not be able to be interference fit in the first mounting hole 200, and the mirror base 100 cannot be initially positioned. Therefore, the present invention sets the rotation center of the mirror base 100 to exceed the cross section where the bottom of the U-shaped groove 240 is located.

[0035] In this embodiment, a lens group mounting groove 210 is provided in the shell 140, and the lens group mounting groove 210 is used to install the collimating lens group 130. One end of the collimating lens group 130 abuts against the bottom of the lens group mounting groove 210, and a pressing assembly is provided at the end of the lens group mounting groove 210. The pressing assembly can abut against the collimating lens group 130 so that the collimating lens group 130 is positioned in the lens group mounting groove 210.

[0036] In this embodiment, the laser tube assembly 150 is interference fit with the inner wall of the rear end of the shell 140. The rear end of the laser tube assembly 150 needs to be pushed into the rear end of the shell 140 by external force, and the distance between the laser tube assembly 150 and the collimating lens assembly 130 is adjusted to complete focusing. The expansion force of the interference fit positions the laser tube assembly 150 at the rear end of the shell 140.

[0037] Specifically, Figure 3 and Figure 4 As shown, the laser tube assembly 150 includes a laser tube holder 152, a laser tube component 151, a PCB drive circuit 153 and a wire 154. The laser tube component 151 is installed at one end of the laser tube holder 152 by interference fit, and the other end of the laser tube holder 152 is interference fit inside the rear end of the shell 140. Specifically, a third mounting hole 260 is provided at the rear end of the shell 140, and the laser tube holder 152 is interference fit in the third mounting hole 260. The PCB drive circuit 153 is connected to the rear end of the laser tube component 151, and the wire 154 is connected to the PCB drive circuit 153. The other end of the wire 154 is connected to a power supply (not shown in the figure). After the PCB drive circuit 153 is powered on, the laser tube component 151 can generate divergent lasers.

[0038] More specifically, the collimating lens assembly 130 in this embodiment can be a single aspheric lens or two cemented lenses, or a component with a spacer ring between two lenses, which is not specifically limited here.

[0039] Specifically, in the first embodiment of the present invention, the pressing assembly includes an elastic rubber ring 120, such as Figure 4As shown, the bottom of the lens group mounting groove 210 is close to the laser tube group 150, and the aperture hole 220 is opened at the bottom of the lens group mounting groove 210, so that the divergent laser of the laser tube group 150 can pass through the aperture hole 220 and be emitted to the collimating lens group 130, and the elastic rubber ring 120 is arranged at one end of the lens group mounting groove 210 close to the first mounting hole 200. After the collimating lens group 130 is installed in the lens group mounting groove 210, the elastic rubber ring 120 is abutted against the collimating lens group 130, and then when the lens holder 100 is interference fit in the first mounting hole 200, the rear end of the lens holder 100 can abut against the elastic rubber ring 120, so that the elastic rubber ring 120 is pressed, and the elastic rubber ring 120 can press the collimating lens group 130 tightly to position the collimating lens group 130 in the lens group mounting groove 210.

[0040] The specific installation process of a laser line module structure provided by the present invention is described in combination with the first embodiment above: First, install the collimating lens group 130 in the lens group installation groove 210, then abut the elastic rubber ring 120 against one end of the collimating lens group 130, and then the lens holder 100 is interference-fitted in the first installation hole 200. At this time, the rear end of the lens holder 100 abuts against the elastic rubber ring 120, and the elastic rubber ring 120 is deformed by force so as to position the collimating lens group 130 in the lens group installation groove 210. Then, the laser tube group 150 is interference-fitted and installed in the third installation hole 260, and a power source (not shown in the figure) is connected. The laser tube 151 of the laser tube group 150 emits a divergent laser, and the divergent laser passes through the aperture hole 220 and then shoots toward the collimating lens group 130. The distance between the laser tube group 150 and the collimating lens group 130 is adjusted to complete focusing. The collimating lens group 130 converts the divergent laser into a collimated laser beam, and the laser tube group 150 is positioned at the rear of the shell 140 under the action of the tightening force of the interference fit, and then the cylindrical mirror 110 is inserted into the second mounting hole 230 of the mirror base 100 and fixed by glue. An adjustment force is applied to the mirror base 100 through the U-shaped groove 240. The adjustment force can push the mirror base 100 to rotate axially around the spherical center of the second surface 310 of the mirror base 100 as the rotation center, thereby adjusting the axial angle of the mirror base 100, so that the axis of the second mounting hole 230 in the mirror base 100 is perpendicular to the axis of the shell 140, and the collimated laser beam is emitted to the cylindrical mirror 110. A laser plane light curtain is formed through transmission, reflection and refraction of the cylindrical mirror 110. After the adjustment is completed, glue is applied at the junction of the U-shaped groove 240 and the mirror base 100 and in the two glue holes 250 to fix the positions of the mirror base 100 and the cylindrical mirror 110, thereby completing the installation of the laser line module structure.

[0041] In the second embodiment of the present invention, the pressing assembly may also be a pressing ring 160, such as Figure 7As shown, the bottom of the lens group mounting groove 210 is close to the lens holder 100, the aperture hole 220 is arranged on the pressure ring 160, the collimating lens group 130 is located inside the lens group mounting groove 210, and the pressure ring 160 is located at one end close to the laser tube group 150. The pressure ring 160 can abut against the collimating lens group 130, so that the collimating lens group 130 can be positioned in the lens group mounting groove 210 by the pressure ring 160, and the outer periphery of the pressure ring 160 has an external thread, and the pressure ring 160 cooperates with the internal thread of the housing 140 to facilitate the installation of the pressure ring 160, and when the thread is matched, the pressure ring 160 can be prevented from axially moving in the housing 140, thereby preventing the pressure ring 160 from detaching from the housing 140.

[0042] The structure of the second embodiment is similar to that of the first embodiment, except that the orientation of the lens group mounting groove 210 in the second embodiment is different, and a pressure ring 160 is used to position the collimating lens group 130. The bottom of the lens group mounting groove 210 in the second embodiment faces the first mounting hole 200, the pressure ring 160 is located at the end of the lens group mounting groove 210, and the aperture hole 220 is opened on the pressure ring 160.

[0043] The specific installation sequence is, first install the collimating lens group 130 in the lens group installation groove 210, then install the pressure ring 160 inside the shell 140, the pressure ring 160 presses the collimating lens group 130 so as to position the collimating lens group 130 in the lens group installation groove 210, then the laser tube group 150 is interference fit in the third installation hole 260, the focusing is completed after adjusting the distance, and the laser tube group 150 is positioned at the tail of the shell 140 under the action of the tightening force of the interference fit, then install the mirror base 100, and then install the cylindrical mirror 110 in the second installation hole 230, then adjust the axial angle of the mirror base 100 and fix it, finally glue is applied at the junction of the U-shaped groove 240 and the mirror base 100 and in the two glue holes 250 to fix the cylindrical mirror 110 and the mirror base 100.

[0044] In the third embodiment of the present invention, the second surface 310 of the mirror holder 100 includes a first split body 320 and a second split body 330. Fig. 9 and Fig.11 As shown, the first split body 320 and the second split body 330 are coaxial and can move axially relative to each other. An elastic ring 340 is arranged between the first split body 320 and the second split body 330. The elastic ring 340 is elastic and the two end faces of the elastic ring 340 respectively abut against the ends of the first split body 320 and the second split body 330 that are close to each other. The elastic ring 340 makes the first split body 320 and the second split body 330 tend to move away from each other, so that the outer periphery of the first split body 320 and the outer periphery of the second split body 330 can tightly abut against the inner wall of the first mounting hole 200.

[0045] It should be noted that the first split body 320 and the second split body 330 specifically cut off the higher part of the second surface 310 of the mirror holder 100, and replace the part with an elastic ring 340, so that the first split body 320 and the second split body 330 can move axially so as to adjust the distance between the first split body 320 and the second split body 330. In this embodiment, the inner wall of the rear side of the first mounting hole 200 is arc-shaped, so as to adapt to the outer periphery of the first split body 320 and the outer periphery of the second split body 330, and the diameter of the arc-shaped surface of the inner wall of the first mounting hole 200 is slightly smaller than the diameter of the spherical surface of the outer periphery of the first split body 320 and the second split body 330, so that the first split body 320 and the second split body 330 can be interference fit with the inner wall of the first mounting hole 200. When the first split body 320 and the second split body 330 are interference fit in the first mounting hole 200, the elastic ring 340 between the first split body 320 and the second split body 330 will be automatically compressed, so that the overall spherical diameter formed by the first split body 320 and the second split body 330 is reduced, thereby reducing the interference amount with the first mounting hole 200. In other words, assuming that the interference amount with the first mounting hole 200 is 10 standard units when the first split body 320 and the second split body 330 are not close to each other, the interference amount can be reduced to 9 standard units through the compression of the elastic ring 340, thereby reducing the interference amount, which makes it easier for the first split body 320 and the second split body 330 to be installed in the first mounting hole 200, and during adjustment When the axial angle of the mirror base 100 is adjusted, the elastic ring 340 is still in a compressed state, so that the friction caused by the interference fit can be reduced when the axial angle of the mirror base 100 is adjusted (the adjustment accuracy of the mirror base 100 is not affected when the friction is reduced), so that it is easier and more labor-saving to adjust the axial angle of the mirror base 100, and after adjusting the angle, glue is dispensed in the glue hole 250 to fix the mirror base 100, and finally the elastic ring 340 begins to expand to tighten the first sub-body 320 and the second sub-body 330. Since the first sub-body 320 is fixed on the shell 140 through the glue hole 250, the elastic ring 340 can release the elastic force when it expands, thereby tightly abutting the outer peripheral surface of the second sub-body 330 against the inner wall of the first mounting hole 200.

[0046] By dividing the second surface 310 of the mirror base 100 into a first sub-body 320 and a second sub-body 330, and arranging an elastic ring 340 between the first sub-body 320 and the second sub-body 330, the elastic ring 340 shrinks inward during the installation of the mirror base 100, so that the interference fit between the mirror base 100 and the first mounting hole 200 is reduced, and when the axial angle of the mirror base 100 is adjusted, the friction force is reduced, and the adjustment force is also reduced accordingly. The elastic ring 340 starts to expand after the axial angle of the mirror base 100 is adjusted, so that the elastic ring 340 can fully press the two ends of the first sub-body 320 and the second sub-body 330, so that the first sub-body 320 and the second sub-body 330 can be tightly abutted against the inner wall of the first mounting hole 200, thereby improving the connection strength of the mirror base 100.

[0047] Specifically, in order to facilitate the connection between the first split body 320 and the second split body 330, a groove 321 is opened on the end of the first split body 320 close to the second split body 330, and the second split body 330 has a convex ring 331 on the end close to the first split body 320. The convex ring 331 is slidably connected in the groove 321. The convex ring 331 can slide axially in the groove 321, thereby connecting the first split body 320 and the second split body 330.

[0048] More specifically, in order to realize the function of the elastic ring 340 being able to shrink and expand, the elastic ring 340 is set to be hollow inside in this embodiment, and when the first sub-body 320 and the second sub-body 330 are installed in the installation groove of the mirror holder 100, the air pressure of the environment needs to be increased, for example, installation, adjustment and glue dispensing are performed in a high-pressure chamber (not shown in the figure), and the glue is removed from the high-pressure chamber after the glue dispensing is completed and the glue solidifies. It can be understood that when the elastic ring 340 is in a high-pressure environment, the gas pressure outside the elastic ring 340 is greater than the internal gas pressure, so the elastic ring 340 is compressed by the external air pressure and shrinks. When the elastic ring 340 is removed from the high-pressure chamber, the air pressure outside the elastic ring 340 decreases, and the elastic ring 340 recovers under the action of its own elasticity, so that it can abut against the first sub-body 320 and the second sub-body 330.

[0049] It should be noted that an elastic sheet is also provided in the hollow interior of the elastic ring 340, which can increase or decrease the deformation force of the elastic ring 340, thereby further increasing the degree of interference fit between the first split body 320 and the second split body 330 and the inner wall of the first mounting hole 200, thereby enhancing the connection strength between the mirror holder 100 and the first mounting hole 200.

[0050] The specific installation process of a laser line module structure provided by the present invention is described in combination with the third embodiment above: The structure of the third embodiment is similar to that of the first embodiment and the second embodiment, except that the second surface 310 of the mirror base 100 in the third embodiment is composed of a first sub-body 320, a second sub-body 330 and an elastic ring 340. The elastic ring 340 is elastic and can shrink and expand, so that the first sub-body 320 and the second sub-body 330 can move axially relative to each other. During the installation of the mirror base 100, a high-pressure environment is required, such as a high-pressure chamber (not shown in the figure). When the mirror base 100 is installed, the elastic ring 340 shrinks, so that the distance between the first sub-body 320 and the second sub-body 330 is closer, so that the mirror base 100 can be pressed into the first mounting hole 200 with a smaller force when the mirror base 100 is installed, and the mirror base 100 can be pressed into the first mounting hole 200 with a smaller force, and the mirror base 100 can be pressed into the first mounting hole 200 with a smaller force. The seat 100 can reduce the friction of the interference fit during adjustment, so that the angle of the mirror seat 100 can be adjusted even when the adjustment force is small. After the adjustment is completed and glue is dispensed in the glue hole 250, the mirror seat 100 is fixed in the first mounting hole 200, and then it can be taken out from the high-pressure chamber. After taking it out, the air pressure outside the elastic ring 340 is reduced, and the elastic ring 340 gradually restores its deformation to push the first sub-body 320 and the second sub-body 330. Since the first sub-body 320 is fixed in the first mounting hole 200 by glue, the elastic ring 340 pushes the second sub-body 330 to tightly abut against the inner wall of the first mounting hole 200, thereby further improving the connection strength of the mirror seat 100. The other installation processes are the same as those of Example 1 and Example 2, and will not be described in detail here.

[0051] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0052] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A laser line module structure, characterized in that: It comprises a shell, the interior of the shell is hollow, and a lens seat, a collimating lens group and a laser tube group are sequentially installed inside the shell from the beginning to the end; The laser tube group is arranged at the rear of the housing, and the laser tube group can generate divergent lasers in the housing; The collimating lens group is installed in the middle of the housing, and an aperture hole is provided in the housing. The aperture hole is located between the collimating lens group and the laser tube group. The divergent laser passes through the aperture hole and directly irradiates the collimating lens group. The collimating lens group can form a collimated laser beam from the divergent laser. The mirror seat has a cylindrical mirror arranged along its radial direction, and the collimated laser beam is irradiated on the cylindrical mirror to form a laser plane light curtain. The outer periphery of the tail of the mirror seat has a spherical surface, and the spherical surface is interference fit with the inner side of the shell head. The mirror seat can rotate axially with the center of the spherical surface as the rotation center to adjust the cylindrical mirror to be perpendicular to the optical axis of the collimated laser beam.

2. The laser line module structure according to claim 1, characterized in that: The outer periphery of the rear portion of the mirror holder has a first surface and a second surface along its axial direction, the first surface is located in front of the second surface, the first surface is cylindrical, the second surface is spherical, the diameter of the first surface is smaller than the diameter of the second surface, and a first mounting hole is provided on the inner side of the shell head, the diameter of the front inner wall of the first mounting hole is larger than the diameter of the rear inner wall, and the diameters of the first surface and the second surface are both smaller than the diameter of the front inner wall of the first mounting hole.

3. The laser line module structure according to claim 2, characterized in that: A second mounting hole is provided in the mirror base along its radial direction, and the cylindrical mirror is inserted into the second mounting hole.

4. The laser line module structure according to claim 3, characterized in that: A U-shaped groove corresponding to the axial ends of the second mounting hole is provided on the side wall of the first mounting hole, and the size of the U-shaped groove is larger than the second mounting hole. A glue spot hole is opened on the side wall of the first mounting hole at a position perpendicular to the axis of the second mounting hole. Glue is filled in the glue spot hole and at the junction of the U-shaped groove and the mirror seat to fix the mirror seat in the first mounting hole.

5. The laser line module structure according to claim 4, characterized in that: The rotation center of the mirror base is concentric with the center of the first mounting hole and exceeds the cross section of the shell where the bottom of the U-shaped groove is located.

6. The laser line module structure according to claim 1, characterized in that: A lens group mounting groove is arranged in the shell, one end of the collimating lens group abuts against the bottom of the lens group mounting groove, and a pressing assembly is arranged at the end of the lens group mounting groove, which can abut against the collimating lens group to position the collimating lens group in the lens group mounting groove.

7. The laser line module structure according to claim 6, characterized in that: The pressing assembly is an elastic rubber ring, which is elastic. The elastic rubber ring abuts against the rear of the lens holder, and the other end of the elastic rubber ring abuts against the collimating lens group.

8. The laser line module structure according to claim 1, characterized in that: The second surface of the mirror base includes a first split body and a second split body, the first split body and the second split body are coaxial and can move axially relative to each other, an elastic ring is arranged between the first split body and the second split body, and two end faces of the elastic ring abut against the first split body and the second split body respectively.

9. The laser line module structure according to claim 8, characterized in that: The elastic ring is hollow inside, and can shrink and deform when the air pressure outside the elastic ring is greater than the air pressure inside the elastic ring, and the first split body and the second split body are close to each other; The elastic ring expands and deforms when the external air pressure is lower than the internal air pressure, and the elastic ring pushes the first split body and the second split body away from each other, and the outer peripheries of the first split body and the second split body abut against the inner side of the shell head.

10. The laser line module structure according to claim 1, characterized in that: The laser tube assembly is arranged at the inner side of the rear portion of the housing by interference fit.

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