A fixed focus fiber laser

Abstract

This application relates to a fixed-focal-length fiber laser, comprising: an upper cover plate, a lower cover plate, a front cover plate, a rear cover plate, a fixing block, a heat sink, a cooling fan, fasteners, and an isolator. The lower cover plate is disposed opposite to the upper cover plate to form a receiving cavity with openings at both ends. The front cover plate is connected to both the lower cover plate and the upper cover plate. The rear cover plate is disposed parallel to and spaced apart from the front cover plate. Both the front and rear cover plates are provided with connecting parts, which abut against the inner sides of the upper and lower cover plates, respectively. The fixing block is located on the outer side of the receiving cavity and is connected to the upper cover plate. The heat sink is provided with multiple fastening holes arranged around the periphery of the heat sink. The cooling fan is fixed to the heat sink. Fasteners pass through the fastening holes to fix the upper cover plate, lower cover plate, front cover plate, and rear cover plate to the heat sink. The isolator, heat sink, and cooling fan are all located within the receiving cavity, thereby reducing the overall volume of the fiber laser. It is fixed to an external mechanism by the fixing block to meet the requirements for fixed-focal-length operation.

Description

Technical Field

[0001] This application relates to the field of lasers, and more specifically, to a fixed-focal-length fiber laser. Background Technology

[0002] Fiber lasers are lasers that use rare-earth-doped glass fibers as the medium. Compared with traditional lasers, fiber lasers have advantages such as high efficiency, good beam quality, compact size, easy integration, strong anti-interference ability, and good heat dissipation. In recent years, the output power of fiber lasers has been greatly improved, and they have found important applications in many fields such as materials processing, medicine, and laser ranging.

[0003] Existing fiber lasers often require the use of an "embedded" focusing rod for focusing, resulting in a large fiber laser size and a complex focal length fixing process. Utility Model Content

[0004] The purpose of this application is to provide a fixed-focal-length fiber laser to solve the problems of large size and complex fixed-focal-length in existing fiber lasers.

[0005] To solve the above problems, this application adopts the following technical solution:

[0006] This application provides a fixed-focal-length fiber laser, comprising:

[0007] Top cover;

[0008] The lower cover plate is disposed opposite to the upper cover plate to form a receiving cavity with openings at both ends;

[0009] A front cover plate connects the lower cover plate and the upper cover plate respectively to block one end opening of the receiving cavity;

[0010] A rear cover plate is provided parallel to and spaced apart from the front cover plate. The rear cover plate blocks the other end opening of the receiving cavity. Both the front cover plate and the rear cover plate are provided with connecting parts, which abut against the inner sides of the upper cover plate and the lower cover plate, respectively.

[0011] A fixing block is located outside the receiving cavity, and the fixing block is connected to the upper cover plate;

[0012] The heat sink is provided with a plurality of fastening holes, which are arranged around the periphery of the heat sink.

[0013] A cooling fan is fixed to the heat sink.

[0014] Fasteners, passing through the fastening holes, secure the upper cover plate, the lower cover plate, the front cover plate, and the rear cover plate to the heat sink plate; and

[0015] The isolator, the heat sink, and the cooling fan are all located within the receiving cavity.

[0016] By uniformly fixing the upper cover, lower cover, front cover, and rear cover to the heat sink with fasteners, a highly integrated and compact whole is formed. This allows for a more rational layout of internal components, reduces the overall size of the laser, and makes it easier to integrate into space-constrained devices. The fixing blocks, which secure the fiber laser to external mechanisms, enable it to meet the requirements for fixed focal length applications.

[0017] Furthermore, the heat sink is provided with multiple heat dissipation channels, which are equally spaced. By providing multiple heat dissipation channels, the effective surface area of ​​the heat sink in contact with the air is greatly increased, improving heat dissipation efficiency and thus controlling the temperature of the internal components of the fiber laser within the operating range.

[0018] Furthermore, the heat sink is provided with perforations located below the cooling fan and communicating with the heat dissipation channels. Since the cooling fan is located above the perforations, when the fan operates, it generates a strong suction force on the perforated area of ​​the heat sink below, which is transmitted through the perforations to the various heat dissipation channels connected to them, further improving the heat exchange effect of the fiber laser.

[0019] Furthermore, the connecting part, the upper cover plate, and the lower cover plate are all provided with connecting holes, and the fixed focal length fiber laser includes a connector, which passes through the connecting hole.

[0020] The upper cover plate, lower cover plate, front cover plate, and rear cover plate are tightly connected into a whole by connectors, which improves the reliability and stability of the fiber laser.

[0021] Furthermore, the connecting part is provided with a boss, and the connecting hole located in the connecting part passes through the boss, thereby making the connection between the connecting part and the connector tighter and reducing the risk of the connector loosening.

[0022] Furthermore, the vertical cross-section of the fixing block is dovetail-shaped. When the fixing block engages with other structural components through its dovetail-shaped portion, a "locking" relationship is formed, so that after the focus is adjusted, the focus is fixed by tightening the fixing block.

[0023] Furthermore, there are two fixing blocks, which are arranged in a straight line and spaced apart along the laser direction of the fixed focal length fiber laser. By arranging two fixing blocks in a straight line and spaced apart along the laser optical path, the optical axis alignment accuracy during fiber laser focusing and movement is ensured, thereby improving the optical path focusing effect and processing accuracy.

[0024] Furthermore, the power of the fixed-focal-length fiber laser is 6W.

[0025] Furthermore, the lower cover plate is provided with heat-conducting holes, which are positioned opposite to the cooling fan. By adding heat-conducting holes opposite to the cooling fan to the lower cover plate, the heat dissipation efficiency is improved, and the internal heat of the fiber laser can be quickly removed.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By uniformly fixing the upper cover, lower cover, front cover, and rear cover to the heat sink with fasteners, a highly integrated and compact structure is formed, resulting in a more rational layout of internal components and maximizing space utilization, thereby significantly reducing the overall size of the fiber laser. Fixing it to the external mechanism with a fixing block allows the fiber laser to meet the requirements for fixed focal length applications.

[0028] 2. Since the heat sink is fixedly connected to the cooling fan, the heat dissipation efficiency of the fiber laser is improved, thereby improving the performance stability and service life of the fiber laser. Attached Figure Description

[0029] Figure 1 A schematic diagram of a fixed-focal-length fiber laser provided for an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of a fixed-focal-length fiber laser provided for an embodiment of this application, wherein the fixing block is hidden;

[0031] Figure 3 for Figure 2 An exploded view of a fixed-focal-length fiber laser.

[0032] Figure 4 An exploded view of a heat sink and a cooling fan provided in an embodiment of this application;

[0033] Figure 5 A schematic diagram of the structure of a rear cover plate provided in an embodiment of this application; and

[0034] Figure 6 for Figure 2 An exploded view of a fixed-focal-length fiber laser from another perspective.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Top cover plate; 2. Bottom cover plate; 21. Heat conduction holes; 3. Front cover plate; 4. Rear cover plate;

[0037] 5. Fixing block; 51. Fixing hole; 6. Heat sink; 61. Fastening hole; 62. Heat dissipation channel; 63. Perforation;

[0038] 7. Cooling fan; 8. Fasteners; 9. Isolator; 10. Connectors;

[0039] P, receiving cavity; Q, connecting part; M, connecting hole; N, boss. Detailed Implementation

[0040] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0041] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific implementation should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0042] It should be understood that the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. These orientation terms are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application.

[0043] Figure 1 A schematic diagram of a fixed-focal-length fiber laser provided for an embodiment of this application; Figure 2 This is a schematic diagram of a fixed-focal-length fiber laser provided for an embodiment of this application, wherein the fixing block is hidden; Figure 3 for Figure 2 An exploded view of a fixed-focal-length fiber laser. Figure 4 An exploded view of a heat sink and a cooling fan provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a rear cover plate provided in an embodiment of this application; Figure 6 for Figure 2 An exploded view of a fixed-focal-length fiber laser from another perspective.

[0044] like Figures 1-6As shown, this application provides a fixed-focal-length fiber laser, including: an upper cover plate 1, a lower cover plate 2, a front cover plate 3, a rear cover plate 4, a fixing block 5, a heat sink 6, a cooling fan 7, fasteners 8, and an isolator 9. The lower cover plate 2 is disposed opposite to the upper cover plate 1 to form a receiving cavity P with openings at both ends. The front cover plate 3 connects the lower cover plate 2 and the upper cover plate 1 respectively to block one end opening of the receiving cavity P. The rear cover plate 4 is disposed parallel to and spaced apart from the front cover plate 3. The rear cover plate 4 blocks the other end opening of the receiving cavity P. Both the front cover plate 3 and the rear cover plate 4 are provided with connecting portions Q, which abut against the inner sides of the upper cover plate 1 and the lower cover plate 2 respectively. The fixing block 5 is located on the outer side of the receiving cavity P and is connected to the upper cover plate 1. The heat sink 6 is provided with multiple fastening holes 61, which are arranged around the periphery of the heat sink 6. The cooling fan 7 is fixed to the heat sink 6, and the fastener 8 passes through the fastening hole 61 to fix the upper cover plate 1, lower cover plate 2, front cover plate 3 and rear cover plate 4 to the heat sink 6; the isolator 9, the heat sink 6 and the cooling fan 7 are all located in the receiving cavity P.

[0045] Specifically, the middle edges of the front cover plate 3 and the rear cover plate 4 are bent inward to form a connecting part Q. During assembly, the connecting parts Q of the front cover plate 3 and the rear cover plate 4 are tightly abutted against the inner sidewalls of the upper cover plate 1 and the lower cover plate 2, respectively. The heat sink 6 is disposed in the receiving cavity P, and multiple fastening holes 61 are provided around the periphery of the heat sink 6. The cooling fan 7 is fixed to the heat sink 6 with screws. The isolator 9, as a passive device, is also mounted on the upper cover plate 1. For example, the heat sink 6 is a flat rectangular block, and fastening holes 61 are provided around the periphery of the heat sink 6. The fasteners 8 are screws, and the front cover plate 3 and the rear cover plate 4 are fixed to both ends of the heat sink 6 with screws. Both the upper cover plate 1 and the lower cover plate 2 are U-shaped, abutting against each other to form a receiving cavity P open at both ends. Multiple fastening holes 61 are also provided on the other two sides of the heat sink 6. Screws pass through the fastening holes 61, ensuring that both the upper cover plate 1 and the lower cover plate 2 are fixedly connected to the heat sink 6. It should be noted that both the front cover plate 3 and the rear cover plate 4 have connecting parts Q, which are bent into the receiving cavity P. The top surface of the bent part contacts the inner wall of the lower cover plate 2 and the upper cover plate 1, thereby increasing the connection between the front cover plate 3, the rear cover plate 4 and the lower cover plate 2, and the upper cover plate 1, improving reliability. Forced air cooling of the heat sink 6 by the cooling fan 7 forms an efficient heat dissipation path, ensuring stable operation of the laser at high power.

[0046] For example, when focusing a fixed-focus fiber laser, a corresponding guide groove is provided on the mounting bracket of the fiber laser, and a fixing block 5 is accommodated in the guide groove. By moving the fixing block 5, the fiber laser moves along the optical axis, thereby achieving the focusing effect. After the focus is adjusted, the fixing block 5 is fixed, thus limiting the movement of the fiber laser and fixing the focus. Specifically, the power of the fixed-focus fiber laser is 6W.

[0047] For example, the lower cover plate 2 is provided with heat conduction holes 21, which are arranged opposite to the cooling fan 7. The outline of the heat conduction holes 21 is a circular grid. By adding heat conduction holes on the lower cover plate 2 that are opposite to the cooling fan 7, the heat dissipation efficiency is improved.

[0048] It should be understood that by uniformly fixing the upper cover plate 1, lower cover plate 2, front cover plate 3, and rear cover plate 4 to the heat sink 6 using fasteners 8, a highly integrated and compact whole is formed, resulting in a more rational layout of internal components and maximizing space utilization, thereby significantly reducing the overall size of the fiber laser. The fixing block 5 ensures that the fiber laser meets the requirements for fixed focal length applications. Since the heat sink 6 is fixedly connected to the cooling fan 7, the heat dissipation efficiency of the fiber laser is improved, thereby enhancing the performance stability and lifespan of the fiber laser.

[0049] In some embodiments, the heat sink 6 is provided with a plurality of heat dissipation channels 62, which are equally spaced. Specifically, the heat sink 6 is generally rectangular, and a plurality of heat dissipation channels 62 are formed along its length direction (i.e., the laser optical axis direction), with the plurality of parallel heat dissipation channels 62 equally spaced. When the cooling fan 7 is started, the cooling fan 7 forces air to flow through the heat dissipation channels 62. By providing a plurality of heat dissipation channels 62, the heat dissipation area of ​​the heat sink 6 is increased, the heat dissipation efficiency is improved, thereby controlling the temperature of the internal components of the fiber laser within the operating range.

[0050] In some embodiments, the heat sink 6 has a through hole 63 located below the cooling fan 7 and communicating with the heat dissipation channel 62. Specifically, a circular through hole 63 is formed on the heat sink 6 in the area corresponding to the mounting position of the cooling fan 7, and the size of the through hole 63 is adapted to the hub of the cooling fan 7. For example, the cooling fan 7 is fixed to the upper surface of the heat sink 6 with screws, and the center of the cooling fan 7 is directly opposite the through hole 63, so that the cooling fan 7 is firmly installed around the through hole 63. The through hole 63 communicates directly with the heat dissipation channel 62. When the cooling fan 7 starts to work, the external cold air acts on each heat dissipation channel 62 through the through hole 63, thereby realizing heat exchange.

[0051] Since the cooling fan 7 is located above the perforation 63, when the cooling fan 7 is working, it generates a strong suction force on the perforated area of ​​the heat sink 6 below, which is transmitted through the perforation 63 to the various heat dissipation channels 62 connected to the perforation 63, further improving the heat exchange effect of the fiber laser.

[0052] In some embodiments, the connecting portion Q, the upper cover plate 1, and the lower cover plate 2 are all provided with connecting holes M. The fixed-focus fiber laser includes a connector 10, which passes through the connecting hole M. Specifically, the front cover plate 3 and the rear cover plate 4 are both bent inward to form a generally L-shaped connecting portion Q. The connecting portion Q is pre-machined with connecting holes M, and the upper cover plate 1 and the lower cover plate 2 are also provided with connecting holes M at corresponding positions. During assembly, the connecting portions Q of the front cover plate 3 and the rear cover plate 4 are first aligned and fitted onto the inner sidewall of the lower cover plate 2. Then, the connecting holes M are aligned, and the connector 10 is inserted and fixed. For example, the connector 10 is a screw, which passes through the connecting holes M in sequence and is finally screwed into the upper cover plate 1 and the lower cover plate 2, so that the front cover plate 3 is locked with the upper cover plate 1 and the lower cover plate 2 to form a whole. The rear cover plate 4 is assembled by referring to the assembly process of the front cover plate 3.

[0053] The upper cover plate 1, lower cover plate 2, front cover plate 3, and rear cover plate 4 are tightly connected into a whole by the connector 10, thereby improving the reliability and stability of the fiber laser.

[0054] In some embodiments, the connecting portion Q is provided with a boss N, and the connecting hole M in the connecting portion Q passes through the boss N. Specifically, the connecting portion Q of the front cover plate 3 and the rear cover plate 4 is formed by stamping and bending. An inwardly facing boss N is provided on the connecting portion Q. The boss N is approximately circular, and the connecting hole M in the connecting portion Q passes through the boss N, thereby making the connection between the connecting portion Q and the connector 10 more secure and reducing the risk of the connector 10 loosening. For example, the thickness of the boss N is greater than the thickness of the connecting portion Q. The connector 10 is inserted from the outside of the lower cover plate 2, passes through the connecting hole M of the lower cover plate 2 in sequence, then passes through the connecting hole M of the upper cover plate 1, and finally screws into and passes through the boss N on the connecting portion Q of the front cover plate 3, and finally locks the boss N.

[0055] In some embodiments, the vertical cross-section of the fixing block 5 is dovetail-shaped. Specifically, the fixing block 5 is elongated with a dovetail-shaped vertical cross-section, forming a dovetail tenon structure. To mate with the dovetail-shaped fixing block 5, a matching dovetail groove is provided on the mounting bracket of the fiber laser. For example, there are two fixing blocks 5, each mounted on the upper cover plate 1. The fixing blocks 5 can slide smoothly along the length of the dovetail groove, but are firmly locked in the direction perpendicular to the groove, preventing loosening or dislodgement. After the fixing block 5 is slid to the predetermined position, focusing is completed. The fixing block 5 is then locked with screws through the fixing hole 51 on its top to fix the focal length. In particular, the two fixing blocks 5 are arranged in a straight line along the laser direction of the fiber laser with the fixed focal length. The laser beam is emitted from the preset hole in the front cover plate 3, and the two fixing blocks 5 together form a linear mounting base along the laser direction. By setting two fixed blocks 5 at linear intervals along the laser beam path, the optical axis alignment accuracy during fiber laser focusing and movement is ensured, improving the focusing effect and processing precision. When the fixed blocks 5 engage with other structural components through their dovetail-shaped parts, a "locking" relationship is formed, allowing the focus to be fixed by tightening the fixed blocks 5 after the focus is adjusted.

[0056] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed in this application.

Claims

1. A fixed-focal-length fiber laser, characterized in that, include: Top cover; The lower cover plate is disposed opposite to the upper cover plate to form a receiving cavity with openings at both ends; A front cover plate connects the lower cover plate and the upper cover plate respectively to block one end opening of the receiving cavity; A rear cover plate is provided parallel to and spaced apart from the front cover plate. The rear cover plate blocks the other end opening of the receiving cavity. Both the front cover plate and the rear cover plate are provided with connecting parts, which abut against the inner sides of the upper cover plate and the lower cover plate, respectively. A fixing block is located outside the receiving cavity, and the fixing block is connected to the upper cover plate; The heat sink is provided with a plurality of fastening holes, which are arranged around the periphery of the heat sink. A cooling fan is fixed to the heat sink. Fasteners, passing through the fastening holes, secure the upper cover plate, the lower cover plate, the front cover plate, and the rear cover plate to the heat sink plate; and The isolator, the heat sink, and the cooling fan are all located within the receiving cavity.

2. A fixed-focal-length fiber laser according to claim 1, characterized in that, The heat sink is provided with multiple heat dissipation channels, which are arranged at equal intervals.

3. A fixed-focal-length fiber laser according to claim 2, characterized in that, The heat sink is provided with perforations, which are located below the cooling fan and are connected to the heat dissipation channel.

4. A fixed-focal-length fiber laser according to claim 1, characterized in that, The connecting part, the upper cover plate, and the lower cover plate are all provided with connecting holes. The fixed focal length fiber laser includes a connector, which passes through the connecting hole.

5. A fixed-focal-length fiber laser according to claim 4, characterized in that, The connecting part is provided with a boss, and the connecting hole located in the connecting part passes through the boss.

6. A fixed-focal-length fiber laser according to claim 1, characterized in that, The vertical cross-section of the fixing block is dovetail-shaped.

7. A fixed-focal-length fiber laser according to claim 1, characterized in that, The number of fixed blocks is two, and the two fixed blocks are arranged in a straight line at intervals along the laser direction of the fixed focal length fiber laser.

8. A fixed-focal-length fiber laser according to claim 1, characterized in that, The fixed-focal-length fiber laser has a power of 6W.

9. A fixed-focal-length fiber laser according to claim 1, characterized in that, The lower cover plate is provided with heat conduction holes, which are arranged opposite to the cooling fan.

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