Linear laser module

Abstract

The utility model provides a linear laser module, and belongs to the technical field of lasers. The linear laser module comprises a shell, a light source, a collimating mirror assembly, a pressing cylinder and a cylindrical mirror, wherein the collimating lens assembly and the light source are installed at the two ends of the shell respectively, the one-way depth is shallow, the front end is provided with the collimating lens assembly in the forward direction, the space is more sufficient, the assembly accuracy is remarkably improved, and accurate and automatic installation and adjustment of the optical lens are facilitated; the pressing cylinder can serve as a cylindrical mirror supporting frame at the same time, so that the relative parallelism of the cylindrical mirror supporting end face and the double lenses is better, meanwhile, the assembling and adjusting procedure is simplified, the automatic assembling and adjusting accuracy and flexibility of the cylindrical mirror are higher, and convenience is provided for automatic assembling and adjusting; a tube base of the light source is omitted, the heat transfer efficiency of the light source and the shell is improved, the fitting degree of the light source and the shell is higher, and the concentricity is better; in addition, the spherical shell is adopted, so that convenience is provided for installation and adjustment on the pendulum body.

Description

Technical Field

[0001] This utility model belongs to the field of laser technology and relates to a single-line laser module for use in laser marking instruments. Background Technology

[0002] Currently, the traditional line marking laser module consists of a shell, a laser diode (LD light source), a socket, a collimating lens assembly, a cylindrical lens, a lens barrel, screws, and spacers. The outer wall of the shell has eight crescent-shaped grooves for assembly and fixing. The lens barrel for mounting the cylindrical lens is located at one end of the shell and is machined integrally with the shell. The lens barrel has screws for adjusting the position of the cylindrical lens. The collimating lens assembly and the laser diode are installed sequentially at the other end of the shell, and the laser diode is installed inside the shell through the socket. The laser emitted by the laser diode is collimated and focused by the collimating lens assembly. After the line laser curvature is adjusted, the screws are fixed, and finally, glue is applied to form the finished product.

[0003] In the laser focusing process of the aforementioned traditional linear laser module, the laser is required to be focused at a distance of 7 meters. To achieve this, a plane mirror needs to be placed at a distance of 3.5 meters. The worker places the linear laser module to be tested on a table, illuminates the laser beam so that it shines onto the mirror, and the mirror then reflects the laser back to the worker. A target with markings is provided at the workstation. The worker must carefully rivet the laser diode into the outer shell of the linear laser module, observing the changes in the laser spot on the target while pressing it in, and stopping the riveting operation when the spot reaches its minimum size.

[0004] When adjusting the curvature of the line laser in the aforementioned traditional linear laser module, three collimators are required. After the laser beam enters the collimator, part of the line laser beam passes through the collimator and exits, while the rest does not. The worker needs to repeatedly check the line laser beam on the receiving surface, adjusting the screws on the lens barrel while observing, until the light beam that has passed through the collimator and the light beam that has not passed through the collimator form a straight line.

[0005] As a result, traditional linear laser modules have a complex structure, long cylindrical mirror calibration time, and complicated manual installation steps that cannot be automated. They also rely on worker experience, and the quality of laser modules produced by different people under different conditions varies, leading to low production efficiency and low precision. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, this utility model provides a linear laser module. Through a brand-new structural design, the assembly sequence is optimized, eliminating structural components such as the LD light source socket and lens barrel, which facilitates the robot to push the LD light source for focusing. At the same time, the cylindrical lens mounting screw is eliminated, which facilitates the assembly of cylindrical lenses by a robotic arm with the aid of vision. This effectively solves the problem of relying on human experience for assembling cylindrical lenses and achieves the standardization of product quality.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A linear laser module includes a housing, a light source, a collimating lens assembly, a pressure cylinder, and a cylindrical mirror;

[0009] The outer shell is a shell structure with a through hole in the center, and the light source is installed in the cavity at the end of the outer shell;

[0010] The front end of the outer shell has a stepped hole, and the outer diameter of the stepped hole is larger than the inner diameter; the pressure cylinder has a cylindrical structure, and the center of the cylinder has a through hole for laser emission. The pressure cylinder is installed in the outer hole at the front end of the outer shell and the collimating lens assembly is fixed in the inner hole.

[0011] The cylindrical mirror is mounted on the pressure cylinder.

[0012] Furthermore, the collimating lens assembly includes a plano-convex lens, a shim, and a plano-concave lens arranged sequentially from front to back.

[0013] Furthermore, the linear laser module also includes a driver board, which is mounted at the end of the housing and connected to the light source.

[0014] Furthermore, the pressure cylinder is installed at the front end of the housing using an interference fit or a threaded fit; the light source is installed at the end of the housing using an interference fit or a threaded fit.

[0015] Furthermore, the inner wall of the housing located between the collimating lens assembly and the light source is provided with matting threads.

[0016] Furthermore, the front end of the outer shell has a cylindrical outer surface, and the end of the outer shell has an arc-shaped outer surface. The arc-shaped structure at the end of the outer shell is used to cooperate with the pendulum body of the line marker to achieve universal adjustment.

[0017] Furthermore, the cylindrical mirror is attached to the outer end face of the pressure cylinder by adhesive bonding.

[0018] Furthermore, the outer end face of the pressure cylinder is provided with a groove for mounting a cylindrical mirror, and the cylindrical mirror is connected to the groove by adhesive.

[0019] Furthermore, the cylindrical mirror is mounted on the pressure cylinder via a base and a slider. The base is a cylindrical structure with a central through hole, mounted above the pressure cylinder and fixed to the outer shell. The through hole on the base is concentric with the through hole on the pressure cylinder. A groove is provided in the middle of the upper surface of the base, and the bottom surface of the groove is an arc-shaped surface. The slider is a cylindrical structure with a central through hole. The bottom of the slider has a protrusion that matches the groove of the base, and the top of the slider has a mounting groove for mounting the cylindrical mirror. The cylindrical mirror is adjusted by sliding the slider in the groove of the base, and then fixed with adhesive after adjustment.

[0020] Furthermore, the cylindrical mirror is mounted on the pressure cylinder via a mounting base; the mounting base is a cylindrical structure with a mounting hole at its bottom, which is used to mount the cylindrical mirror above the pressure cylinder and fix it to the outer shell. The center of the top surface of the mounting base has a through hole for laser emission and a groove for mounting the cylindrical mirror. Multiple screws are provided on the outside of the through hole for adjusting the cylindrical mirror.

[0021] The beneficial effects of this utility model are:

[0022] 1) This utility model installs the collimating lens assembly and the light source at opposite ends of the housing, facilitating precise and automated adjustment of the optical lenses. If the collimating lens assembly and the light source are simultaneously assembled from the rear of the housing, the assembly depth becomes greater, making automated assembly difficult, inefficient, and hindering rework. This utility model, through bidirectional assembly, has a shallower unidirectional depth, significantly enhancing assembly accuracy and thus improving efficiency and quality. Furthermore, the front-facing mounting of the dual lenses (plano-convex and plano-concave lenses) provides more space, and the pressure cylinder can simultaneously serve as a cylindrical lens support, resulting in better parallelism between the cylindrical lens support end face and the dual lenses. This also enhances the precision and flexibility of the automated cylindrical lens adjustment.

[0023] 2) This invention eliminates traditional components such as the tube base, lens barrel, and screws, optimizing heat dissipation and improving product reliability. In the original structure, the tube base served to fix the laser diode and conduct heat. Because the lens barrel and housing were machined as a single unit, the front-end space was limited, requiring the dual lenses to be installed from the rear. Furthermore, the diameter of the dual lenses was larger than the diameter of the laser diode, resulting in a large assembly space at the rear of the laser diode, necessitating the tube base to support the connection between the laser diode and the housing. This invention, by improving the cylindrical lens assembly and adjustment method, not only simplifies the assembly and adjustment process, avoiding the low efficiency and accuracy issues of manual screw adjustment, thus facilitating automated assembly and adjustment, but also eliminates the tube base, increasing the heat transfer efficiency between the laser diode and the housing, resulting in a better fit and concentricity. It also reduces material costs, increases production efficiency, improves product reliability, and makes the product more competitive.

[0024] 3) The outer end of the outer shell of this utility model has an arc-shaped outer surface, which facilitates assembly and adjustment on the pendulum body. Traditional linear laser modules require adjustment screws to be used for assembly when mounted on the rear pendulum body. In order to achieve more convenient automated assembly and adjustment, the arc-shaped outer shell can be directly assembled and adjusted as a whole on the pendulum body. Attached Figure Description

[0025] Figure 1 This is an exploded view of the components of the linear laser module in Example 1.

[0026] Figure 2 This is a schematic diagram of the longitudinal section of the linear laser module in Example 1.

[0027] Figure 3 This is an assembly diagram of the linear laser module in Example 2.

[0028] Figure 4 This is an assembly diagram of the linear laser module in Example 2.

[0029] Figure 5 This is a schematic diagram of the structure of the line laser module in Example 3; where (a) is the overall structure and (b) is a cross-sectional view.

[0030] Figure 6 This is a schematic diagram of the base and slider in Embodiment 3; where (a) is the base and (b) is the slider.

[0031] Figure 7 This is a schematic diagram of the structure of the line laser module in Example 4; where (a) is the overall structure and (b) is a cross-sectional view.

[0032] In the diagram: 1. Outer shell; 2. Laser diode; 3. Plano-concave mirror; 4. Gasket; 5. Plano-convex mirror; 6. Pressure cylinder; 7. Cylindrical mirror. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] Example 1: As Figures 1-2 As shown, this embodiment provides a single-line laser module, including a housing 1, a laser diode 2, a collimating lens assembly, a pressure cylinder 6, a cylindrical lens 7, and a driving board.

[0035] The outer surface of the end of the outer shell 1 is an arc-shaped surface with a through hole in the center; the laser diode 2 is riveted into the cavity at the end of the outer shell 1, and the light source emitted by the laser diode 2 is upward, that is, away from the bottom of the outer shell 1.

[0036] The outer surface of the front end of the outer casing 1 is a cylindrical surface, with stepped holes inside, and the outer diameter of the stepped holes is larger than the inner diameter; for example Figure 2 As shown, the plano-concave mirror 3, the gasket 4, and the plano-convex mirror 5 are assembled in sequence to form a collimating mirror assembly; the pressure cylinder 6 is riveted and installed in the outer hole at the front end of the housing 1 and fixes the collimating mirror assembly in the inner hole. The collimating mirror assembly focuses the light emitted by the laser diode 2 and continues to emit it upward.

[0037] The inner wall of the housing 1 located between the collimating lens assembly and the laser diode 2 is provided with an anti-glare thread.

[0038] The pressure cylinder 6 has a cylindrical structure with a through hole in the center. After the cylindrical mirror 7 is adjusted, it is fixed to the top of the pressure cylinder 6 by dispensing glue. The cylindrical mirror 7 is used to process the light so that it becomes light within a certain range.

[0039] The drive board is installed at the end of the housing 1 and is electrically connected to the laser diode 2. The drive board is a circuit drive board used to control the laser diode. A wire is also installed below the drive board to facilitate conduction.

[0040] Example 2: As Figures 3-4 As shown, this embodiment provides a linear laser module. The difference from embodiment 1 is that the outer end face of the pressure cylinder 6 is provided with a groove, and the cylindrical mirror 7 is connected to the groove by adhesive so as to release stress.

[0041] Example 3: As Figure 5 As shown, this embodiment provides a linear laser module, which differs from Embodiment 1 in that the cylindrical mirror 7 is mounted on the pressure cylinder 6 via a base and slider mechanism; as shown Figure 6 (a) and Figure 5 (b) The base is a cylindrical structure with a central through hole, which is installed above the pressure cylinder 6 and fixed to the outer shell 1. The through hole on the base is concentric with the through hole on the pressure cylinder 6. A groove is provided in the middle of the upper surface of the base, and the bottom surface of the groove is an arc-shaped surface; Figure 6 (b) and Figure 5 The slider has a cylindrical structure with a central hole. The bottom of the slider has a protrusion that matches the base groove, and the top of the slider has a mounting groove. The cylindrical mirror 7 is installed in the groove, and the cylindrical mirror 7 is adjusted by sliding the slider in the base groove. After adjustment, it is fixed with glue.

[0042] Example 4: Figure 7 As shown, this embodiment provides a linear laser module. The difference from embodiment 1 is that the cylindrical mirror 7 is mounted on the pressure cylinder 6 via a mounting base. The mounting base is a cylindrical structure with a mounting hole at its bottom. It is mounted above the pressure cylinder 6 and fixed to the outer shell 1 through the mounting hole. The center of the top surface of the mounting base has a through hole for laser emission and a groove for mounting the cylindrical mirror. Multiple screws are provided on the outside of the through hole for adjusting the cylindrical mirror.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A laser module for one word line, characterized in that, The application relates to a linear laser module. The shell is a shell structure with a through hole in the center, and the light source is arranged in the cavity at the end of the shell. The front end of the shell is a stepped hole, and the aperture of the outer hole is larger than that of the inner hole; the pressing cylinder is arranged in the outer hole at the front end of the shell and fixes the collimating mirror assembly in the inner hole. The cylindrical lens is arranged on the pressing cylinder.

2. The laser module according to claim 1, wherein The collimating mirror assembly comprises a plano-convex lens, a gasket and a plano-concave lens arranged in sequence from front to back.

3. The laser module of claim 1, wherein the laser module is a one-line laser module. The linear laser module further comprises a driving board arranged at the end of the shell and connected with the light source.

4. The laser module of claim 1, wherein the laser module is a one-line laser module. The pressing cylinder is arranged at the front end of the shell in a manner of interference fit or threaded fit; and the light source is arranged at the end of the shell in a manner of interference fit or threaded fit.

5. The laser module of claim 1, wherein the laser module is a one-line laser module. An extinction thread is arranged on the inner wall of the shell between the collimating mirror assembly and the light source.

6. The laser module of claim 1, wherein the laser module is a one-line laser module. The front end of the shell is a cylindrical outer surface, and the end of the shell is an arc-shaped outer surface.

7. The laser module of claim 1, wherein the laser module is a one-line laser module. The cylindrical lens is connected to the outer side end surface of the pressing cylinder in a manner of gluing.

8. The laser module of claim 1, wherein the laser module is a one-line laser module. A groove for arranging the cylindrical lens is arranged on the outer side end surface of the pressing cylinder.

9. The laser module of claim 1, wherein the laser module is a one-line laser module. The cylindrical lens is arranged on the pressing cylinder in a manner of base and sliding block cooperation; the base is a cylindrical structure with a through hole in the center, and is arranged above the pressing cylinder and fixed on the shell; the through hole of the base is concentric with the through hole of the pressing cylinder; a sliding groove is arranged on the middle part of the top surface of the base, and the bottom surface of the sliding groove is an arc surface; the sliding block is a cylindrical structure with a through hole in the center, and is provided with a convex part matched with the sliding groove of the base on the bottom part and a mounting groove for arranging the cylindrical lens on the top part; the cylindrical lens is adjusted by sliding the sliding block in the sliding groove, and is fixed after adjustment.

10. The laser module of claim 1, wherein the laser module is a one-line laser module. The cylindrical lens is arranged on the pressing cylinder in a manner of mounting seat; the mounting seat is a cylindrical structure, and is provided with a mounting hole on the bottom part for arranging above the pressing cylinder and fixed on the shell; a through hole for laser emission and a groove for arranging the cylindrical lens are arranged on the top surface of the mounting seat; a plurality of screws for adjusting the cylindrical lens are arranged outside the through hole.

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