A laser

Abstract

The utility model relates to the technical field of laser, specifically relates to a kind of laser.The utility model provides a laser, including shell, light emitting mechanism, first lens and adjusting mechanism;The utility model provides a laser, first lens is located in the light path by adjusting mechanism, and adjusting mechanism can adjust the distance of first lens in the light path relative to the light emitting mechanism, and then adjust the size of the light spot emitted by laser, without according to the edge area size of each electrode sheet, specially customized corresponding auxiliary heating laser, can satisfy the demand of different electrode sheet edge area auxiliary heating, better universality, reduce the preparation cost of lithium battery.

Description

Technical Field

[0001] This utility model relates to the field of laser technology, and specifically to a laser. Background Technology

[0002] Coating is a crucial step in lithium battery production. It involves applying a slurry to the surface of the electrode sheet. After coating, the slurry needs to be heated for rapid dehydration. Currently, electrode drying typically employs a "hot air + infrared" oven mode or a laser drying mode. The core idea of ​​laser drying is to use a high-energy-density, narrow-spectrum absorption laser to directly heat the coating in a "volume-based" manner, causing the solvent to evaporate in a very short time. Simultaneously, through zoned closed-loop control of the laser power, the temperature gradients in the lateral and longitudinal directions of the electrode sheet are minimized, thereby reducing cracking, wrinkling, and solvent residue.

[0003] In the laser drying heating area of ​​lithium battery coating, the heat from the light is transferred to the surrounding areas, with the temperature concentrated in the central region. The edge areas, however, experience rapid heat dissipation and low heating efficiency due to the material itself, resulting in a problem of low temperature at the edges during laser drying. Existing technologies can use auxiliary heating to address this issue. However, during electrode coating, only a few millimeters of the edge area experience this low temperature problem, meaning the area requiring heating is relatively small. Furthermore, the size of the electrode edge requiring heating fluctuates within a certain range across different coating processes. Current lasers typically have custom-designed, fixed, and relatively large spot sizes, making them unsuitable for the diverse auxiliary heating needs of different electrode edges. Utility Model Content

[0004] (a) The purpose of this utility model is to provide a laser that can meet the auxiliary heating requirements of edge areas of different sizes of electrode sheets, so as to solve the problem of fast heat dissipation and low temperature at the edge in the laser drying heating area of ​​lithium battery coating.

[0005] (II) Technical Solution To address the aforementioned technical problems, one embodiment of this utility model provides a laser, which includes a housing, a light-emitting mechanism, a first lens, and an adjustment mechanism. A cavity is formed inside the housing, and a light outlet communicating with the cavity is provided on the housing. The light-emitting mechanism is disposed inside the cavity. A light-emitting optical path is formed between the light-emitting side of the light-emitting mechanism and the light-emitting port, and the first lens is disposed in the light-emitting optical path through an adjustment mechanism; The adjustment mechanism is used to adjust the distance of the first lens relative to the light-emitting mechanism in the light-emitting path direction.

[0006] According to one embodiment of the present invention, the adjustment mechanism includes a fixed base and a connecting screw, and the first lens is disposed on the fixed base; The inner wall of the housing is provided with a plurality of threaded holes, which are spaced apart along the direction from the light-emitting side to the light-emitting port of the light-emitting mechanism; The connecting screw passes through the fixing seat and is threaded into the threaded hole to fix the fixing seat to the housing.

[0007] According to one embodiment of the present invention, the fixing base is provided with an elongated hole extending along the light output path direction, and the first lens is provided with a notch that can cover the elongated hole; The first lens is connected to one side of the fixed base, and the focusing lens, the fixed base, and the housing with the threaded hole are arranged in sequence; The connecting screw passes through the notch and the elongated hole and is threaded into the threaded hole.

[0008] According to one embodiment of the present invention, the first lens includes a focusing lens, the edge of the focusing lens near the light-emitting mechanism is flush with the edge of the fixing base, and the focusing lens forms an arc-shaped notch on the side facing the light outlet.

[0009] According to one embodiment of the present invention, the housing includes a bottom plate, a side plate, and a base plate. The edges of the base plate are connected to the edges of the bottom plate through the side plates to form the cavity between the bottom plate, the side plates, and the base plate. The threaded hole is provided on the inner wall of the base plate.

[0010] According to one embodiment of the present invention, the cavity includes a first cavity, a second cavity, and a third cavity that are sequentially connected from the light-emitting side of the light-emitting mechanism to the light-emitting port. The width of the first cavity is consistent from the light-emitting side of the light-emitting mechanism to the direction near the second cavity, and the width of the third cavity is consistent from the direction near the second cavity to the light-emitting port. The width of the second cavity gradually increases from the direction near the first cavity to the direction near the third cavity. The light-emitting mechanism is located in the first cavity, and the light-emitting port is formed in the third cavity.

[0011] According to one embodiment of the present invention, the laser further includes a light-emitting component, which is disposed at the light-emitting port, and a light-transmitting port communicating with the cavity and the outside is formed on the light-emitting component.

[0012] According to one embodiment of the present invention, the light-emitting component includes a fixed frame, a second lens, and a light-transmitting sheet. The fixed frame is embedded in the light-emitting port, the light-transmitting sheet is fixed at the light-transmitting port, and the second lens is disposed on the light-transmitting sheet and located inside the second lens.

[0013] According to one embodiment of the present invention, the light-emitting mechanism includes a light-emitting module and a mounting base; The mounting base is disposed in the cavity, and the light-emitting module is detachably connected to the mounting base. The light-emitting module is used to emit a light beam.

[0014] According to one embodiment of the present invention, the light-emitting module includes a heat sink, a laser unit, and electrodes; Multiple laser units are spaced apart on one side surface of the heat sink and arranged in an array, while the other side of the heat sink is detachably connected to the mounting base. The heat sink has a cooling channel, and multiple laser units are connected in series via connectors. The electrode is detachably connected to the heat sink and is used to power the multiple laser units.

[0015] The beneficial effects of this utility model are as follows: The laser provided by this utility model includes a housing, a light-emitting mechanism, a first lens, and an adjustment mechanism. A cavity is formed inside the housing, and a light-emitting port communicating with the cavity is provided on the housing. The light-emitting mechanism is disposed within the cavity. A light-emitting optical path is formed between the light-emitting mechanism and the light-emitting port. The first lens is disposed within the light-emitting optical path, and the adjustment mechanism is used to adjust the distance of the first lens relative to the light-emitting mechanism in the light-emitting optical path direction. In the laser provided by this utility model, the distance of the first lens relative to the light-emitting mechanism in the light-emitting optical path direction can be adjusted by the adjustment structure, thereby adjusting the size of the laser spot emitted. Furthermore, the first lens in this application is replaceable, and different working distances can be adjusted by replacing different first lenses. It eliminates the need to specially customize corresponding auxiliary heating lasers based on the edge area size of each electrode sheet, thus meeting the needs of auxiliary heating of different electrode sheet edge areas, improving versatility, and reducing the manufacturing cost of lithium batteries. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1A perspective view of a laser provided in one embodiment of the present invention; Figure 2 An exploded view of the laser; Figure 3 A perspective view of a laser provided as an embodiment of the present invention; Figure 4 for Figure 3 A sectional view; Figure 5 This is an exploded view of the shell. Figure 6 This is a 3D view of the light-emitting component; Figure 7 A three-dimensional view of the light-emitting mechanism; Figure 8 for Figure 7 Enlarged view of part A; Figure 9 This is a schematic diagram of the structure in which the mounting base and the first lens are fitted together.

[0018] icon: 1-Laser; 11-House; 111-Base plate; 112-Side; 1121-Flanged edge; 113-Substrate; 1131-Threaded hole; 114-Cavity; 115-Light outlet; 12-Fixing base; 121-Elongated hole; 13-First lens; 131-Notch; 14-Light emission assembly; 141-Fixing frame; 1411-Light transmission port; 142-Second lens; 143-Light transmission sheet; 15-Light-emitting mechanism; 151-Mounting base; 152-Laser unit; 1521-Laser chip; 153-Heat sink; 154-Heat dissipation teeth; 155-Ceramic sheet; 156-Connector. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] like Figures 1 to 9 As shown, the laser 1 includes a housing 11, a light-emitting mechanism 15, a first lens 13, and an adjustment mechanism.

[0021] A cavity 114 is formed inside the housing 11, and a light outlet 115 communicating with the cavity 114 is provided on the housing 11. The light-emitting mechanism 15 is disposed inside the cavity 114.

[0022] A light-emitting path is formed between the light-emitting side of the light-emitting mechanism 15 and the light-emitting port 115, and the first lens 13 is disposed in the light-emitting path through an adjustment mechanism.

[0023] The adjustment mechanism is used to adjust the distance of the first lens 13 relative to the light-emitting mechanism 15 in the light-emitting optical path direction.

[0024] The laser 1 provided by this utility model includes a housing 11, a light-emitting mechanism 15, a first lens 13, and an adjustment mechanism.

[0025] A cavity 114 is formed within the housing 11, and a light-emitting port 115 communicating with the cavity 114 is provided on the housing 11. A light-emitting optical path is formed between the light-emitting side of the light-emitting mechanism 15 and the light-emitting port 115. The first lens 13 is disposed within the light-emitting optical path via an adjustment mechanism. The light-emitting mechanism 15 is disposed within the cavity 114 to emit a light beam. The light beam is transmitted along the optical path, passes through the first lens 13, and exits from the light-emitting port 115. The first lens 13 can focus and compress the light beam. The first lens 13 is disposed within the light-emitting optical path via an adjustment structure, and the distance of the first lens 13 relative to the light-emitting mechanism 15 in the light-emitting optical path direction can be adjusted by the adjustment mechanism, thereby adjusting the size of the emitted light spot. In addition, the first lens 13 in this application is replaceable, and different working distances can be adjusted by replacing different first lenses 13; therefore, the laser 1 provided in this application can be applied to the needs of auxiliary heating of different electrode edge areas, has better versatility, and can reduce equipment investment costs.

[0026] According to one embodiment of the present invention, such as Figures 1 to 4 As shown, openings and light-emitting ports 115 are formed on opposite sides of the housing 11, that is, the openings and light-emitting ports 115 are arranged opposite to each other.

[0027] It is understood that the opening and the light-emitting port 115 described in this application may not be arranged opposite each other. For example, the opening and the light-emitting port 115 may be perpendicular to each other. Then, the light beam emitted by the light-emitting mechanism 15 at the opening is reflected by the reflector to the light-emitting port 115 and transmitted outward through the light-emitting port 115.

[0028] In this embodiment, the opening and the light outlet 115 are arranged opposite to each other. The light beam emitted by the light-emitting mechanism 15 is transmitted towards the light outlet 115. The light beam passes through the first lens 13, which is a focusing lens. The focusing lens can focus and compress the light beam and adjust the width and height of the light spot. Therefore, by adjusting the distance between the first lens 13 and the light-emitting mechanism 15, the size of the light spot can be adjusted so that the size of the light spot meets the requirements of the edge area of ​​the electrode sheet for heating compensation.

[0029] Preferably, the light-emitting port 115 is parallel to the light-emitting surface of the light-emitting mechanism 15, and the area of ​​the light-emitting port 115 is larger than the area of ​​the opening. In this embodiment, the width of the light-emitting port 115 is larger than the width of the opening.

[0030] According to one embodiment of the present invention, such as Figure 2 and Figure 4 As shown, the adjustment mechanism includes a fixing base 12 and connecting screws. The first lens 13 is mounted on the fixing base 12; the inner wall of the housing 11 has multiple threaded holes 1131, which are spaced apart along the direction from the light-emitting side of the light-emitting mechanism 15 to the light-emitting port 115; the connecting screw passes through the fixing base 12 and is threadedly connected to the threaded holes 1131 to fix the fixing base 12 to the housing 11. In this embodiment, the first lens 13 is bonded to one side of the fixing base 12, and the inner wall of one side of the housing 11 has multiple threaded holes 1131 spaced apart along the direction of the light-emitting path. The connecting screw passes through the fixing base 12 and is threadedly connected to the threaded holes 1131 to fix the fixing base 12 to the inner wall of the housing 11. Since the fixing base 12 and the housing 11 are detachably connected by connecting screws, the fixing base 12 and the first lens 13 can be easily disassembled and replaced, and different working distances can be adjusted for different designs of the first lens 13.

[0031] like Figure 2 and Figure 9 As shown, both the mounting base 12 and the focusing lens are rectangular blocks, and the first lens 13 is fitted to the long and wide edges of the mounting base 12. The edge of the focusing lens near the light-emitting mechanism 15 is flush with the edge of the mounting base 12, and the side of the focusing lens facing the light outlet 115 forms an arc-shaped notch 131. The first lens 13 is connected to one side of the mounting base 12, and the focusing lens, the mounting base 12, and the housing 11 with the threaded hole 1131 are arranged sequentially. The connecting screw passes through the notch 131 and the elongated hole 121 and is threaded into the threaded hole 1131.

[0032] In this embodiment, the fixing base 12 is provided with an elongated hole 121, and the elongated hole 121 corresponds to the notch 131. That is, the projection of the notch 131 on the fixing base 12 can cover the elongated hole 121.

[0033] When installing the mounting base 12, the connecting screw is passed through the notch 131 and the elongated hole 121 from the side connected to the first lens 13 and connected to the threaded hole 1131. At this time, the nut of the connecting screw presses the mounting base 12 tightly onto the housing 11, thus realizing the installation and fixation of the mounting base 12. When it is necessary to adjust the working distance of the first lens 13, it is only necessary to adjust the connection of the connecting screw to the threaded hole 1131 at different distances from the light outlet 115 to adjust the distance of the first lens 13 from the light-emitting mechanism 15 in the light-emitting optical path, making the operation more convenient.

[0034] According to one embodiment of the present invention, such as Figures 1 to 4 The housing 11 includes a base plate 111, side edges 112, and a base plate 113. The edges of the base plate 111 are connected to the edges of the base plate 113 via the side edges 112, forming a cavity 114 between the base plate 111, the side edges 112, and the base plate 113. The cavity 114 is an open-ended cavity; the light-emitting mechanism 15 is installed in one end, and the other end is the light-emitting port 115. In this embodiment, the base plate 111 and the side edges 112 can be integrally formed, which is more convenient to manufacture and provides better strength. The base plate 113 is fixed to the side edges 112 by screws.

[0035] like Figures 1 to 3 As shown, the edge of the side 112 is bent outward to form a right-angle flange 1121. A through hole is provided on the flange 1121, and a corresponding through hole is also provided on the base plate 113. The base plate 113 and the side 112 are then connected by screws. A groove is provided on the side of the base plate 113 away from the side 112 at the through hole. The groove is used to place and hide the nut, thereby improving the appearance of the housing 11.

[0036] In the above embodiments of this application, the cavity 114 includes a first cavity, a second cavity, and a third cavity that are sequentially connected from the light-emitting side of the self-emitting mechanism 15 to the light-emitting port 115. The first cavity has a uniform width from the light-emitting side of the light-emitting mechanism to the direction near the second cavity, and the third cavity has a uniform width from the direction near the second cavity to the light-emitting port 115. The width of the second cavity gradually increases from the direction near the first cavity to the direction near the third cavity. The light-emitting mechanism 15 is disposed in the first cavity, and the light-emitting port 115 is formed in the third cavity.

[0037] In this embodiment, the two side edges 112 corresponding to the first cavity are parallel to each other, and the two side edges 112 corresponding to the third cavity are also parallel to each other. The width of the first cavity is smaller than the width of the third cavity. The width of the second cavity gradually increases from the end connected to the first cavity to the end connected to the second cavity. The light-emitting mechanism 15 is disposed within the first cavity, and the light beam emitted by the light-emitting mechanism 15 passes sequentially through the first cavity, the second cavity, and the third cavity. In this application, the beam emitted by the light-emitting mechanism 15 forms a light spot with gradually increasing width after passing through the first lens 13. The width of the second cavity gradually increases from near the first cavity to near the third cavity to adapt to the change in light spot size.

[0038] In this embodiment, the light-emitting optical path is further provided with a fast-axis collimating lens and a slow-axis collimating lens. The light beam emitted by the light-emitting mechanism 15 is collimated by the fast-axis collimating lens, the first lens 13, and the slow-axis collimating lens to form a line spot. The fast-axis collimating lens is located between the light-emitting side of the light-emitting mechanism 15 and the first lens 13, and is positioned close to the light-emitting side of the light-emitting mechanism 15. The laser provided in this application can be shaped by selecting different lenses and prisms in the fast-axis direction according to actual needs. The formed light spot can be Gaussian or trapezoidal, which can meet the heating requirements of different shapes and sizes. The fast-axis width and slow-axis width of the line spot can be adjusted according to actual applications. Optionally, in this embodiment, the width of the light spot can be adjusted within the range of 30mm-400mm, and the height of the light spot can be adjusted within the range of 3mm-10mm.

[0039] According to one embodiment of the present invention, such as Figure 2 and Figure 6 As shown, the laser 1 further includes a light-emitting component 14, which is disposed at the light-emitting port 115. The light-emitting component 14 has a light-transmitting port 1411 that connects the cavity 114 and the outside. In the embodiment of the main body, the light beam emitted by the light-emitting mechanism 15 passes through the first lens 13 and then enters the light-emitting component 14 of the light-emitting port 115 before being emitted.

[0040] like Figure 6 As shown, the light-emitting assembly 14 includes a fixing frame 141, a second lens 142, and a light-transmitting sheet 143. The fixing frame 141 is embedded in the light-emitting port 115, the light-transmitting sheet 143 is fixed at the light-transmitting port 1411, and the second lens 142 is disposed on the light-transmitting sheet 143 and located inside the second lens 142. The light-emitting port 115 is rectangular, and the fixing frame 141 has a rectangular light-transmitting port 1411 in the middle. The light-transmitting sheet 143 is disposed within the light-transmitting port 1411. In this embodiment, the light-transmitting sheet 143 is transparent glass, and the second lens 142 is fixed on the light-transmitting sheet 143.

[0041] According to one embodiment of the present invention, such as Figure 2 and Figure 7 As shown, the light-emitting mechanism 15 includes a light-emitting module and a mounting base 151. The mounting base 151 is disposed within the opening, and the light-emitting module is detachably connected to the mounting base 151. A suitable light-emitting module can be selected according to the required power of the laser 1, making installation and disassembly of the light-emitting module more convenient. In this embodiment, the light-emitting module is used to emit a light beam, and the mounting base 151 is fixed within the opening. Specifically, the mounting base 151 is connected to the housing 11 by screws.

[0042] like Figure 7 and Figure 8 As shown, the light-emitting module includes a heat sink 153, laser units 152, and electrodes. Multiple laser units 152 are spaced apart on one side surface of the heat sink 153 and arranged in an array. The other side of the heat sink 153 is detachably connected to the mounting base 151. The heat sink 153 has cooling channels. The mounting base 151 has inlet and outlet holes. Cooling water flows through the cooling channels via the inlet and outlet holes to cool the heat sink 153, thereby cooling the laser units 152 mounted on the heat sink 153. Figure 7 and Figure 8 As shown, the heat sink 153 is provided with heat dissipation teeth 154 and ceramic sheet 155 in sequence. The laser unit 152 is disposed on the ceramic sheet 155. The heat dissipation teeth 154 can increase the heat dissipation area and improve the heat dissipation efficiency. At the same time, the ceramic sheet 155 can realize the separation and insulation of the electrodes, and the ceramic sheet 155 can also further improve the heat dissipation performance.

[0043] like Figure 8 As shown, multiple laser units 152 are connected in series via connectors 156. Preferably, the laser unit 152 is a bar, and the wavelength of the bar can be selected from 808-1064nm. By confirming the absorption of wavelength by the heating material, the bar with the highest utilization rate is selected for encapsulation. A single bar can be selected from 100-700W to meet the high power density output.

[0044] The electrode includes a positive electrode and a negative electrode, which power all laser units 152. The electrode is detachably connected to the heat sink 153. The other side of the heat sink 153 is detachably connected to the mounting base 151. The light-emitting module is detachably connected to the mounting base 151. Therefore, the heat sink 153, the electrode and the light-emitting mechanism 15 in this application can be easily disassembled and replaced. Thus, a suitable electrode and light-emitting mechanism 15 can be selected according to the requirements of different power and wavelength output lasers, and then a suitable heat sink 153 can be selected. The laser unit 152 has a sandwich structure, that is, a laser chip 1521 is sandwiched between two heat sink plates.

[0045] The principle of the laser 1 provided by this utility model for compensating the edge region of the heating electrode sheet will be explained in detail below.

[0046] First, determine the size of the edge area of ​​the heating electrode sheet that needs compensation, for example, determine that the width of the edge area to be heated is 3 mm-10 mm; then adjust the position of the connecting screw connected to the threaded hole 1131 on the inner wall of the housing 11, so that the connecting screw passes through the notch 131 of the first lens 13, the elongated hole 121 on the fixing seat 12 and the threaded hole 1131 on the inner wall of the housing 11, and fix the fixing seat 12 to the housing 11. At this time, the laser unit 152 of the light-emitting mechanism 15 emits a beam of light, which passes through the first lens 13 and then passes through the second lens 142 and the light-transmitting plate 143 along the light path and exits from the light-transmitting port 1411. The size of the light spot emitted by the laser 1 can correspond to the size of the edge area of ​​the electrode sheet that needs to be heated, which can compensate for the heat of the edge area of ​​the heating electrode sheet with less heat. When it is necessary to adjust the size of the light spot, the distance between the first lens 13 and the light-emitting mechanism 15 in the light-emitting path can be adjusted by adjusting the position of the connecting screw and the threaded hole 1131 on the inner wall of the housing 11.

[0047] In the description of this utility model, it should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser, characterized in that, The laser (1) includes a housing (11), a light-emitting mechanism (15), a first lens (13), and an adjustment mechanism; A cavity (114) is formed inside the housing (11), and a light outlet (115) communicating with the cavity (114) is provided on the housing (11). The light-emitting mechanism (15) is disposed inside the cavity (114). A light-emitting path is formed between the light-emitting side of the light-emitting mechanism (15) and the light-emitting port (115), and the first lens (13) is disposed in the light-emitting path through an adjustment mechanism; The adjustment mechanism is used to adjust the distance of the first lens (13) relative to the light-emitting mechanism (15) in the light-emitting path direction.

2. The laser according to claim 1, characterized in that, The adjustment mechanism includes a fixed base (12) and connecting screws, and the first lens (13) is disposed on the fixed base (12); The inner wall of the housing (11) is provided with a plurality of threaded holes (1131), and the plurality of threaded holes (1131) are distributed at intervals along the direction from the light-emitting side of the light-emitting mechanism (15) to the light-emitting port (115); The connecting screw passes through the fixing seat (12) and is threaded into the threaded hole (1131) to fix the fixing seat (12) to the housing (11).

3. The laser according to claim 2, characterized in that, The mounting base (12) is provided with an elongated hole (121) extending along the light path direction, and the first lens (13) is provided with a notch (131) that can cover the elongated hole (121). The first lens (13) is connected to one side of the fixed base (12), and the first lens (13), the fixed base (12) and the housing (11) with the threaded hole (1131) are arranged in sequence; The connecting screw passes through the notch (131) and the elongated hole (121) and is threaded into the threaded hole (1131).

4. The laser according to claim 3, characterized in that, The first lens (13) includes a focusing lens, the edge of which near the light-emitting mechanism (15) is flush with the edge of the fixing base (12), and the focusing lens forms an arc-shaped notch (131) on the side facing the light outlet (115).

5. The laser according to claim 2, characterized in that, The housing (11) includes a base plate (111), a side (112) and a base plate (113). The edge of the base plate (113) is connected to the edge of the base plate (111) through the side (112) to form a cavity (114) between the base plate (111), the side (112) and the base plate (113). The threaded hole (1131) is provided on the inner wall of the base plate (113).

6. The laser according to claim 5, characterized in that, The cavity (114) includes a first cavity, a second cavity, and a third cavity that are sequentially connected from the light-emitting side of the light-emitting mechanism (15) to the light-emitting port (115); The width of the first cavity is consistent from the light-emitting side of the light-emitting mechanism (15) to the direction close to the second cavity, and the width of the third cavity is consistent from the direction close to the second cavity to the light-emitting port (115). The width of the second cavity gradually increases from the direction close to the first cavity to the direction close to the third cavity. The light-emitting mechanism (15) is disposed in the first cavity, and the light-emitting port (115) is formed in the third cavity.

7. The laser according to any one of claims 1 to 6, characterized in that, The laser (1) further includes a light-emitting component (14), which is located at the light-emitting port (115). A light-transmitting port (1411) is formed on the light-emitting component (14) to connect the cavity (114) and the outside.

8. The laser according to claim 7, characterized in that, The light-emitting assembly (14) includes a fixed frame (141), a second lens (142), and a light-transmitting sheet (143). The fixed frame (141) is embedded in the light-emitting port (115), the light-transmitting sheet (143) is fixed at the light-transmitting port (1411), and the second lens (142) is disposed on the light-transmitting sheet (143) and located inside the second lens (142).

9. The laser according to any one of claims 1 to 6, characterized in that, The light-emitting mechanism (15) includes a light-emitting module and a mounting base (151); The mounting base (151) is located inside the cavity (114), and the light-emitting module is detachably connected to the mounting base (151). The light-emitting module is used to emit a light beam.

10. The laser according to claim 9, characterized in that, The light-emitting module includes a heat sink (153), a laser unit (152), and electrodes; Multiple laser units (152) are spaced apart on one side surface of the heat sink (153) and arranged in an array. The other side of the heat sink (153) is detachably connected to the mounting base (151). The heat sink (153) is provided with a cooling channel, and multiple laser units (152) are connected in series through connectors (156). The electrode is detachably connected to the heat sink (153) and is used to supply power to the multiple laser units (152).

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