Laser module

Abstract

The utility model belongs to the technical field of gradienters, and particularly relates to a laser module which comprises a mounting seat, a mounting cavity is arranged in the mounting seat, a focusing lens is arranged in the mounting cavity, a light source and a reflecting mirror are respectively arranged at two ends of the mounting cavity, and a conical reflecting side surface and a plurality of reflecting planes are arranged on the reflecting mirror. The reflecting planes extend along the length direction of the generatrix of the reflecting side surface and are arranged in a circumferential array by taking the central axis of the reflecting side surface as a circle center; the mounting base comprises a shell and a fixing piece, the mounting cavity is formed in the shell, the fixing piece is of an integrated structure and is arranged at the end of the shell, an irradiation hole is formed in the fixing piece, the reflection plane and the reflection side face are arranged in the irradiation hole in a penetrating mode, and a plurality of reflection holes corresponding to the reflection plane are formed in the side wall of the irradiation hole; the utility model aims to provide the laser module which is simple in structure and convenient to produce and process.

Description

Technical Field

[0001] The utility model belongs to the technical field of spirit levels, and particularly relates to a laser module. Background Art

[0002] A laser spirit level is a household hardware decoration tool, which is widely used in the construction industry.

[0003] The laser spirit level includes a laser diode and a reflector. During use, the laser generated by the laser diode is reflected by the reflector towards the wall, and visible horizontal lines, vertical lines, and strong light points are projected on the wall. For example, a laser module of a spirit level disclosed in Chinese Utility Model Patent Application CN 202323400797.8 includes a housing. An installation cavity is provided in the housing. A focusing lens is provided in the installation cavity. A light source and a reflector are respectively provided at both ends of the installation cavity. A conical reflecting portion is provided on the reflector. The reflecting portion includes a conical first reflecting portion and a second reflecting portion provided at the top of the first reflecting portion. A reflecting side surface is provided on the outer periphery of the first reflecting portion. A plurality of reflecting planes are provided on the side surface of the second reflecting portion. The reflecting planes extend along the length direction of the generatrix of the reflecting side surface; the housing includes a light-transmitting mask with a square cross-section. The middle part of the light-transmitting mask is the light-emitting area. The reflecting portion of the reflector is located within the light-emitting area.

[0004] However, in this structure, the reflector is installed on the light-transmitting mask. Most of the light-transmitting masks are made of glass. The light reflected by the reflector passes through the light-transmitting mask and is projected on the wall. In the production process, the surface processing accuracy requirements of the light-transmitting mask are relatively high, and the glass light-transmitting mask is easily scratched during the production and transportation processes, resulting in blurred light projected on the wall, affecting the normal work of workers. Moreover, the side edge thickness of the light-transmitting mask is relatively large, which will act as a convex lens, resulting in the dispersion of the strong light points and the reference lines, or causing the outer sides of the strong light points and the reference lines to be serrated, affecting the operation of workers. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of the utility model is to provide a laser module with a simple structure and convenient production and processing.

[0006] The purpose of the utility model is achieved as follows:

[0007] A laser module includes a mounting base. An installation cavity is provided in the mounting base. A focusing lens is provided in the installation cavity. A light source and a reflector are respectively provided at both ends of the installation cavity. A conical reflecting side surface and a plurality of reflecting planes are provided on the reflector. The reflecting planes extend along the length direction of the generatrix of the reflecting side surface. The reflecting planes are arranged in a circumferential array with the central axis of the reflecting side surface as the center of the circle;

[0008] The mounting base includes a housing and a fixing member. An installation cavity is arranged in the housing. The fixing member is of an integral structure and is arranged at the end of the housing. An irradiation hole is provided on the fixing member. The reflecting plane and the reflecting side surface are inserted into the irradiation hole. A plurality of reflecting holes corresponding to the reflecting plane are provided on the side wall of the irradiation hole;

[0009] When the laser emitted by the light source irradiates the reflecting side surface, the laser reflected by the reflecting side surface forms an annular laser surface, and a reference line is projected on the wall through the reflecting hole; the laser reflected by the reflecting plane forms a laser beam, and a strong light spot is projected on the wall through the reflecting hole.

[0010] The present utility model is further configured as: a positioning portion is provided on the reflecting mirror, a pressing wall is provided on one side of the positioning portion, the positioning portion is adapted to the irradiation hole, and the pressing wall presses against the end of the irradiation hole, so that the reflecting mirror is axially positioned and installed along the irradiation hole.

[0011] The present utility model is further configured as: a reduced opening is provided at one end of the irradiation hole away from the light source. The positioning portion cooperates with the reduced opening to position and install the reflecting mirror and the fixing member. An annular groove is provided on the outer periphery of the positioning portion, and glue is stored in the groove to glue the reflecting mirror and the fixing member.

[0012] The present utility model is further configured as: the fixing member includes a first fixing ring and a second fixing ring arranged at intervals. The first fixing ring and the second fixing ring are respectively connected to the housing and the reflecting mirror. At least two connecting rods are arranged at intervals between the first fixing ring and the second fixing ring. The reflecting holes are formed between the first fixing ring, the second fixing ring and the adjacent two ends of the connecting rods. The irradiation hole penetrates through the first fixing ring and extends between the connecting rods.

[0013] The present utility model is further configured as: a positioning groove is provided at the end of the housing. The first fixing ring is adapted to the positioning groove, and an adjustment gap is formed between the first fixing ring and the side wall of the positioning groove. The relative position between the light source and the reflecting mirror can be adjusted through the adjustment gap, so that the center of the laser emitted by the light source irradiates the center of the conical reflecting side surface.

[0014] The present utility model is further configured as: the reflecting holes on the fixing member correspond to the reflecting planes on the reflecting mirror one by one.

[0015] The present utility model is further configured as: a first indication mark and a second indication mark are respectively provided on the fixing member and the reflecting mirror. The first indication mark and the second indication mark correspond to each other to prevent the reflecting plane from being misaligned with the reflecting hole.

[0016] The present utility model is further configured as: the fixing member is an integral metal part.

[0017] The present utility model is further configured as follows: a conical reflecting portion is provided on the reflecting mirror. The reflecting portion includes a frustum-shaped first reflecting portion and a second reflecting portion provided at the top of the first reflecting portion. The reflecting side is the side wall of the outer peripheral cone of the reflecting portion, and the reflecting plane is provided on the side of the first reflecting portion.

[0018] The present utility model is further configured as follows: one end of the reflecting plane extends to the bottom of the second reflecting portion, the other end of the reflecting plane extends to the lower part of the first reflecting portion, and a connecting surface is provided between the reflecting plane and the reflecting side. The connecting surface is arranged parallel to the central axis of the reflecting portion, or the connecting surface forms a negative angle with the central axis of the reflecting portion.

[0019] The advantages of the present utility model compared with the prior art are as follows:

[0020] 1. In the present utility model, the fixing member and the irradiation hole will not cause laser scattering or refraction, so the surfaces of the fixing member and the irradiation hole do not require high precision, which is convenient for processing and production. Moreover, since the fixing member does not need to be made of glass, it has high strength and is not easily damaged, which is beneficial to extending the service life of the laser module; due to the integral structure of the fixing member, it has higher strength and higher processing precision, which is beneficial to the positioning and installation of the reflecting mirror and the light source.

[0021] 2. The setting of the positioning portion and the abutting wall in the present utility model is beneficial to the rapid positioning and installation of the reflecting mirror along the axial direction of the irradiation hole, avoiding the misalignment of the reflecting side and the reflecting plane with the irradiation hole caused by the misalignment of the reflecting mirror, which is convenient for the assembly and production of the laser module; the constriction setting is beneficial to reducing the precision machining surface on the fixing member, while the groove setting is convenient for storing more glue, which is convenient for the gluing and fixing of the reflecting mirror and the fixing member.

[0022] 3. In the present utility model, the first fixing ring and the second fixing ring are convenient for the fixing member to be connected to the outer shell and the reflecting mirror respectively. Connecting the first fixing ring and the second fixing ring through the connecting rod is beneficial to increasing the length of the reflecting hole, facilitating the projection of the annular laser surface formed by the reflection of the reflecting side on the working surface, reducing the break on the reference line during use, and facilitating the improvement of the working efficiency of workers; the positioning groove setting is convenient for the irradiation direction of the laser emitted by the light source to be parallel to the axis of the reflecting side, while the adjustment gap setting is convenient for the producer to control the center of the laser to irradiate on the center of the reflecting side, so that the reflecting mirror can uniformly reflect the laser to the periphery of the reflecting mirror.

[0023] 4. The corresponding reflecting holes and reflecting planes in the present utility model are convenient for the laser reflected by the reflecting plane to pass through the irradiation holes respectively to form strong light spots, avoiding the deflection of the reflecting plane and the irradiation hole and affecting the brightness of the strong light spots, which is convenient for users to use; the setting of the first indication mark and the second indication mark is convenient for workers to determine the relative position of the reflecting plane and the reflecting hole during installation, avoiding the connecting rod blocking the reflecting plane and affecting the brightness of the strong light spot or causing the strong light spot to not be projected on the working surface.

[0024] 5. In the present utility model, the conical reflection side surface can project the laser to form an annular reference line, avoiding the break of the reference line during use, facilitating the improvement of the working efficiency of workers, and the structure is simple, convenient for production and processing; the reflection plane arranged parallel to the generatrix is conducive to forming a strong light spot on the wall surface opposite to the reflection plane, facilitating the use of the user, and since the connection surface is arranged parallel to or at a negative angle with the central axis of the reflection part, it avoids the laser being reflected by the connection surface and forming a laser spot during use, thereby interfering with the user's use of the laser module and facilitating the user's use; the reflection plane formed by cutting into the reflection part is conducive to reducing the volume of the reflecting mirror and the raw materials required for processing the reflecting mirror, thereby saving costs and reducing the influence of the mass of the reflecting mirror on the installation of the reflecting mirror. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present utility model;

[0026] Figure 2 is a cross-sectional view of the present utility model;

[0027] Figure 3 is an exploded schematic diagram of the present utility model;

[0028] Figure 4 is a schematic structural diagram of the fixing member in the present utility model;

[0029] Figure 5 is a schematic structural diagram of the reflecting mirror in the present utility model;

[0030] Figure 6 is a partially enlarged view of the reflecting mirror in the present utility model;

[0031] Figure 7 is a partial cross-sectional view of the reflecting mirror in the present utility model.

[0032] The meanings of the reference numerals in the drawings: 1 - mounting base; 11 - housing; 12 - fixing member; 13 - irradiation hole; 14 - reflection hole; 15 - connecting rod; 16 - first indication mark; 17 - necking; 18 - first fixing ring; 19 - second fixing ring; | 111 - mounting cavity; 112 - positioning groove; 113 - adjustment gap; 2 - light source; 3 - reflecting mirror; 31 - reflection part; 32 - second reflection part; 33 - first reflection part; 34 - positioning part; 35 - abutting wall; 36 - second indication mark; 331 - reflection plane; 332 - connection surface; 333 - reflection side surface; 341 - groove; 4 - fixing base;

[0033] 5 - focusing lens. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present utility model will be further described below with reference to the drawings in specific embodiments:

[0035] See Figures 1 to 7 As shown, a laser module includes a mounting base 1. A mounting cavity 111 is provided in the mounting base 1. A focusing lens 5 is provided in the mounting cavity 111. A light source 2 and a reflecting mirror 3 are respectively provided at both ends of the mounting cavity 111. The reflecting mirror 3 is provided with a conical reflecting side surface 333 and a plurality of reflecting planes 331. The reflecting planes 331 extend along the generatrix length direction of the reflecting side surface 333. The reflecting planes 331 are arranged in a circumferential array with the central axis of the reflecting side surface 333 as the center of the circle. The mounting base 1 includes a housing 11 and a fixing member 12. The mounting cavity 111 is provided in the housing 11. The fixing member 12 is provided at the end of the housing 11. An irradiation hole 13 is provided on the fixing member 12. The reflecting plane 331 and the reflecting side surface 333 penetrate through the irradiation hole 13. A plurality of reflecting holes 14 corresponding to the reflecting planes 331 are provided on the side wall of the irradiation hole 13.

[0036] When the laser emitted by the light source 2 irradiates the reflecting side surface 333, the laser reflected by the reflecting side surface 333 forms an annular laser surface, and a reference line is projected on the wall through the reflecting hole 14. The laser reflected by the reflecting plane 331 forms a laser beam, and a strong light spot is projected on the wall through the reflecting hole 14.

[0037] In the above structure, a reference line is formed by reflection of the reflecting side surface 333, and a strong light spot is formed by reflection of the reflecting plane 331. During use, the fixing member 12 and the irradiation hole 13 will not cause laser scattering or refraction. Therefore, the surfaces of the fixing member 12 and the irradiation hole 13 do not require high precision, which is convenient for processing and production. Moreover, since the fixing member 12 does not need to be made of glass, it has high strength and is not easily damaged, which is beneficial to extending the service life of the laser module.

[0038] A positioning groove 112 is provided at the end of the housing 11. The fixing member 12 is fixed in the positioning groove 112 by a fastener or glue. A fixing seat 4 is provided in the mounting cavity 111. The focusing lens 5 is fixedly arranged in the mounting cavity 111 through the fixing seat 4.

[0039] In this embodiment, the fixing member 12 is of an integral structure. The integral structure has higher strength and higher machining precision, which is beneficial to the positioning and installation of the reflecting mirror 3 and the light source 2. The fixing member 12 can be made of metal, plastic or other materials with stable structure and less deformation. Preferably, the fixing member 12 is an integral metal part. Compared with plastic parts, the fixing member 12 made of metal material has higher strength, higher machining precision, and is not easily deformed or damaged during use.

[0040] In the present utility model, a positioning portion 34 is provided on the reflecting mirror 3. A pressing wall 35 is provided on one side of the positioning portion 34. The positioning portion 34 is adapted to the irradiation hole 13, and the pressing wall 35 presses against the end of the irradiation hole 13, so that the reflecting mirror 3 is axially positioned and installed along the irradiation hole 13. The arrangement of the positioning portion 34 and the pressing wall 35 is conducive to the quick axial positioning and installation of the reflecting mirror 3 along the irradiation hole 13, avoiding the dislocation of the reflecting mirror 3, which may cause the reflecting side surface 333 and the reflecting plane 331 to be misaligned with the irradiation hole 13, and facilitating the assembly and production of the laser module.

[0041] The irradiation hole 13 can directly penetrate the fixing member 12, and the positioning portion 34 is directly adapted to the side wall of the irradiation hole 13. However, this requires a relatively high machining accuracy for the entire side wall of the irradiation hole 13. Otherwise, it will affect the positioning and installation of the reflecting mirror 3 and the fixing member 12. In this embodiment, a reduced diameter portion 17 is provided at the end of the irradiation hole 13 away from the light source 2. The positioning portion 34 cooperates with the reduced diameter portion 17 to position and install the reflecting mirror 3 and the fixing member 12. The arrangement of the reduced diameter portion 17 is conducive to reducing the precision machining surface on the fixing member 12. The producer does not need to finely machine the entire side wall of the irradiation hole 13, and it can also reduce the influence of the reflection hole 14 on the machining of the reduced diameter portion 17 during the production process.

[0042] An annular groove 341 is provided on the outer periphery of the positioning portion 34. Glue is stored in the groove 341 to glue the reflecting mirror 3 and the fixing member 12. The arrangement of the groove 341 is convenient for storing more glue and facilitating the gluing and fixing of the reflecting mirror 3 and the fixing member 12.

[0043] The fixing member 12 includes a first fixing ring 18 and a second fixing ring 19 which are spaced apart. The first fixing ring 18 and the second fixing ring 19 are respectively connected to the housing 11 and the reflecting mirror 3. At least two connecting rods 15 are spaced between the first fixing ring 18 and the second fixing ring 19. The reflecting hole 14 is formed between the first fixing ring 18, the second fixing ring 19 and the adjacent ends of the connecting rods 15. The irradiation hole 13 penetrates the first fixing ring 18 and extends between the connecting rods 15. The first fixing ring 18 and the second fixing ring 19 are convenient for the fixing member 12 to be connected to the housing 11 and the reflecting mirror 3 respectively. Connecting the first fixing ring 18 and the second fixing ring 19 through the connecting rods 15 is conducive to increasing the length of the reflecting hole 14, facilitating the projection of the annular laser surface formed by the reflection of the reflecting side surface 333 on the working surface, reducing the break at the reference line during use, and facilitating the improvement of the working efficiency of workers.

[0044] Preferably, a positioning groove 112 is provided at the end of the shell 11, the first fixing ring 18 is adapted to the positioning groove 112, and an adjustment gap 113 is formed between the first fixing ring 18 and the side wall of the positioning groove 112. The relative position of the light source 2 and the reflector 3 can be adjusted by adjusting the gap 113, so that the center of the laser emitted by the light source 2 is irradiated on the center of the conical reflective side surface 333. During the production process of this structure, it is necessary to ensure the verticality of the bottom surface of the positioning groove 112 and the axial direction of the mounting seat 1. The setting of the positioning groove 112 facilitates the irradiation direction of the laser emitted by the light source 2 to be parallel to the axis of the reflective side surface 333, and the setting of the adjustment gap 113 facilitates the producer to control the center of the laser to irradiate on the center of the reflective side surface 333, so that the reflector 3 can evenly reflect the laser to the side around the reflector 3.

[0045] During the production process of the present invention, the reflecting plane 331 needs to be staggered with the connecting rod 15 to prevent the connecting rod 15 from affecting the reflection plane 331 from projecting on the wall to form a strong light spot. During the production process, the number of reflecting holes 14 and reflecting planes 331 may not be equal. One reflecting hole 14 may correspond to multiple reflecting planes 331, or the number of reflecting holes 14 may be greater than the number of reflecting planes 331. However, this may easily lead to different relative positions of each reflecting plane 331 and the connecting rods 15 on both sides of the reflecting hole 14, thereby affecting the brightness and shape of the strong light spot. Therefore, it is preferred that the reflecting holes 14 on the fixing member 12 correspond one-to-one to the reflecting plane 331 on the reflector 3. The one-to-one corresponding reflecting holes 14 and reflecting planes 331 facilitate the laser reflected by the reflecting plane 331 to pass through the irradiation hole 13 respectively to form a strong light spot, thereby avoiding the reflection plane 331 and the irradiation hole 13 from being skewed and affecting the brightness of the strong light spot, which is convenient for users to use.

[0046] Preferably, a first indicator mark 16 and a second indicator mark 36 are respectively provided on the fixing member 12 and the reflector 3. The first indicator mark 16 and the second indicator mark 36 correspond to each other to avoid misalignment between the reflecting plane 331 and the reflecting hole 14. The setting of the first indicator mark 16 and the second indicator mark 36 facilitates workers to determine the relative position of the reflecting plane 331 and the reflecting hole 14 during the installation process, thereby avoiding the connecting rod 15 blocking the reflecting plane 331 and affecting the brightness of the strong light spot or causing the strong light spot to be unable to be projected onto the work surface.

[0047] The above-mentioned first indicator mark 16 and second indicator mark 36 correspond to each other, which means that the first indicator mark 16 and second indicator mark 36 are connected to each other, parallel to each other or perpendicular to each other. Workers only need to judge the relative position of the reflective plane 331 and the reflective hole 14 based on the first indicator mark 16 and second indicator mark 36.

[0048] A conical reflecting portion 31 is provided on the reflecting mirror 3. The reflecting portion 31 includes a frustum-shaped first reflecting portion 33 and a second reflecting portion 32 provided at the top of the first reflecting portion 33. The reflecting side surface 333 is the side wall of the outer peripheral cone of the reflecting portion 31. The reflecting plane 331 is provided on the side surface of the first reflecting portion 33. The conical reflecting side surface 333 can project the laser to form an annular reference line, avoiding the break of the reference line during use, facilitating the improvement of the working efficiency of workers, and the structure is simple and convenient for production and processing.

[0049] In the present utility model, one end of the reflecting plane 331 extends to the bottom of the second reflecting portion 32, and the other end of the reflecting plane 331 extends to the lower part of the first reflecting portion 33. A connecting surface 332 is provided between the reflecting plane 331 and the reflecting side surface 333. The connecting surface 332 is arranged parallel to the central axis of the reflecting portion 31, or the connecting surface 332 is arranged at a negative angle with respect to the central axis of the reflecting portion 31 and is arranged parallel to the generatrix. The reflecting plane 33, which is parallel to the generatrix, is beneficial to forming a strong light spot on the wall opposite to the reflecting plane 331, facilitating the use of the user. And because the connecting surface 332 is arranged parallel to or at a negative angle with respect to the central axis of the reflecting portion 31, it is avoided that the laser is reflected by the connecting surface 332 and forms a laser spot during use, thereby interfering with the user's use of the laser module and facilitating the user's use.

[0050] In this embodiment, the connecting surface 332 is arranged parallel to the central axis of the reflecting portion 31. The connecting surface 332 is arranged at a negative angle with respect to the central axis of the reflecting portion 31, that is, the lower part of the connecting surface 332 inclines towards the central axis of the reflecting portion 31. When in use, the laser shining on the connecting surface 332 will be first reflected by the second reflecting portion 32, and the second reflecting portion 32 will block the connecting surface 332. Therefore, the connecting surface 332 will not reflect the laser to form a light spot on the wall surface.

[0051] Preferably, the first reflecting portion 33 is cut inward to form the reflecting plane 331. The reflecting plane 331 is arranged parallel to a generatrix of the first reflecting portion 33, and the distance c between the reflecting plane 331 and the generatrix is between 0.03 and 0.1 mm. The reflecting plane 331 formed by cutting the reflecting portion 31 inward is beneficial to reducing the volume of the reflecting mirror 3 and the raw materials required for processing the reflecting mirror 3, thereby saving costs and reducing the influence of the mass of the reflecting mirror 3 on the installation of the reflecting mirror 3. In the present utility model, the distance c between the reflecting plane 331 and the generatrix is 0.05 mm.

[0052] The projected height L1 of the reflecting plane 331 on the central axis of the reflecting portion 31 is 1 / 5 - 1 / 3 of the height L2 of the reflecting portion 31.

[0053] In the present utility model, 2 - 8 reflection planes 331 are provided on the reflection part 313. In this embodiment, the apex angle of the reflection part 31 is 90 degrees. There are four reflection planes 331 on the first reflection part 33, and the included angle d between two relatively arranged reflection planes 331 is 90 degrees. This structure facilitates the vertical reflection of the laser to the outer periphery of the reflection part 31, which is beneficial for the annular reference line formed by the laser projection to be on the same plane.

[0054] The above embodiments are only the preferred embodiments of the present utility model, and do not limit the protection scope of the present utility model accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A laser module, comprising a mounting base (1), a mounting cavity (111) is arranged in the mounting base (1), a focusing lens (5) is arranged in the mounting cavity (111), a light source (2) and a reflecting mirror (3) are respectively arranged at two ends of the mounting cavity (111), and it is characterized in that: The mirror (3) is provided with a conical reflecting side surface (333) and a plurality of reflecting planes (331). The reflecting planes (331) extend along the generatrix length direction of the reflecting side surface (333), and the reflecting planes (331) are arranged in a circumferential array with the central axis of the reflecting side surface (333) as the center of the circle; The mounting base (1) includes a housing (11) and a fixing member (12). A mounting cavity (111) is arranged in the housing (11). The fixing member (12) is of an integral structure and is arranged at the end of the housing (11). An irradiation hole (13) is provided on the fixing member (12). The reflecting plane (331) and the reflecting side surface (333) pass through the irradiation hole (13), and a plurality of reflecting holes (14) corresponding to the reflecting planes (331) are provided on the side wall of the irradiation hole (13); When the laser emitted by the light source (2) irradiates the reflecting side surface (333), the laser reflected by the reflecting side surface (333) forms an annular laser surface, and a reference line is projected on the wall through the reflecting hole (14); the laser reflected by the reflecting plane (331) forms a laser beam, and a strong light spot is projected on the wall through the reflecting hole (14).

2. The laser module according to claim 1, characterized in that: The mirror (3) is provided with a positioning portion (34). A pressing wall (35) is arranged on one side of the positioning portion (34). The positioning portion (34) is adapted to the irradiation hole (13), and the pressing wall (35) presses against the end of the irradiation hole (13), so that the mirror (3) is axially positioned and installed along the irradiation hole (13).

3. A laser module according to claim 2, characterized in that: A necking (17) is arranged at one end of the irradiation hole (13) away from the light source (2). The positioning portion (34) cooperates with the necking (17) to position and install the mirror (3) and the fixing member (12). An annular groove (341) is arranged on the outer periphery of the positioning portion (34), and glue is stored in the groove (341) to glue the mirror (3) and the fixing member (12).

4. A laser module according to claim 1, characterized in that: The fixing member (12) includes a first fixing ring (18) and a second fixing ring (1)9) arranged at intervals. The first fixing ring (18) and the second fixing ring (19) are respectively connected to the housing (11) and the mirror (3). At least two connecting rods (15) are arranged at intervals between the first fixing ring (18) and the second fixing ring (19). The reflecting holes (14) are formed between the first fixing ring (18), the second fixing ring (19) and the adjacent two ends of the connecting rods (15). The irradiation hole (13) penetrates through the first fixing ring (18) and extends between the connecting rods (15).

5. The laser module according to claim 4, wherein: A positioning groove (a) is arranged at the end of the housing (11). The first fixing ring (18) is adapted to the positioning groove (112), and an adjusting gap (113) is formed between the first fixing ring (18) and the side wall of the positioning groove (112). The relative position of the light source (2) and the mirror (3) can be adjusted through the adjusting gap (113), so that the center of the laser emitted by the light source (2) irradiates the center of the conical reflecting side surface (333).

6. The laser module according to claim 4, wherein: The reflecting holes (14) on the fixing member (12) correspond to the reflecting planes (331) on the mirror (3) one by one.

7. A laser module according to claim 1, wherein: The fixing member (12) and the mirror (3) are respectively provided with a first indicating mark (16) and a second indicating mark (36), and the first indicating mark (16) and the second indicating mark (36) correspond to each other to prevent the reflection plane (331) from being misaligned with the reflection hole (14).

8. A laser module according to claim 1, wherein: The fixing member (12) is an integral metal part.

9. A laser module according to claim 1 or 2 or 3 or 4 or 6 or 7 or 8, characterized in that: The mirror (3) is provided with a conical reflection part (31), and the reflection part (31) includes a frustum-shaped first reflection part (33) and a second reflection part (32) arranged at the top of the first reflection part (33). The reflection side wall (333) is the side wall of the outer peripheral cone of the reflection part (31), and the reflection plane (331) is arranged on the side of the first reflection part (33).

10. A laser module according to claim 9, characterized in that: One end of the reflection plane (331) extends to the bottom of the second reflection part (32), and the other end of the reflection plane (331) extends to the lower part of the first reflection part (33). A connecting surface (332) is arranged between the reflection plane (331) and the reflection side wall (333), and the connecting surface (332) is arranged parallel to the central axis of the reflection part (31), or the connecting surface (332) is arranged at a negative angle with the central axis of the reflection part (31).

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