Laser processing head and assembling method thereof

Abstract

The invention discloses a laser processing head and an assembling method thereof. The laser machining head comprises a shell, a control panel assembly and a fastener. A mounting cavity is formed in the shell; the control panel assembly is arranged in the mounting cavity, and the control panel assembly comprises a main circuit board and at least one limiting piece; the main circuit board comprises a plurality of hard circuit boards and flexible connecting sections for connecting the adjacent hard circuit boards; the plurality of hard circuit boards are arranged at intervals in a laminated manner; the at least one limiting piece is clamped on the side edges of the stacked hard circuit boards so as to keep the relative positions of the hard circuit boards; and the fastener penetrates through the control panel assembly to fix the control panel assembly in the mounting cavity. According to the technical scheme, the miniaturization and light-weight design of the laser machining head is achieved under the condition that assembling is easy and convenient, and the structure is stable.

Description

Technical Field

[0001] This application relates to the field of circuit board technology, and in particular to a laser processing head and its assembly method. Background Technology

[0002] Laser welding is a highly efficient welding method that uses a high-energy-density laser beam as a heat source to precisely process workpieces. For welding small batches of irregular weld seams, a handheld laser processing gun is typically used. To achieve precise control of the welding process, the processing gun usually integrates a control board for regulating laser energy output, optical path control, auxiliary gas supply, and responding to user commands. The performance stability and structural rationality of the control board directly affect the welding quality and user experience of the processing gun.

[0003] Currently, laser processing heads commonly use traditional single-piece rigid printed circuit boards as control boards. These circuit boards typically use rigid substrates such as FR-4, with all electronic components soldered onto a single planar board. While this design is technologically mature, it has gradually revealed the following inherent drawbacks when addressing the increasing demands for miniaturization and lightweight processing equipment: 1. Large space occupation, hindering equipment miniaturization: The rigid circuit board cannot be folded, and its planar dimensions determine the minimum installation space required inside the processing gun. To accommodate the control board, the processing gun housing must be designed with a cavity of a corresponding size, which directly limits further reduction in the overall size of the processing gun, contradicting users' expectations for compact and portable equipment.

[0004] 2. Poor internal layout and assembly flexibility: The fixed shape of rigid circuit boards makes it difficult to adapt to the complex and irregular space inside the machining gun. Their installation typically relies on multiple fixed points around the circuit, requiring the alignment and insertion of multiple screws during assembly, making the process cumbersome. When arranging multi-layered circuit functions in a confined space, it can only be achieved by increasing the board area or using multiple independent boards connected by cables, which further increases the complexity and weight of the structure, as well as the risk of unreliable connections.

[0005] 3. Potential issues with vibration resistance and reliability: In handheld operation scenarios, large-area rigid circuit boards may resonate due to their inherent frequency, potentially affecting the reliability of solder joints and components in the long term. While this can be mitigated by adding fixing points, this further increases assembly complexity and weight.

[0006] To address these issues, some manufacturers have attempted to use flexible printed circuit boards (FPCs) to achieve greater wiring flexibility. However, the mechanical strength of a simple FPC is insufficient to directly and stably support and secure heavier components. Furthermore, combining multiple small rigid boards with connectors or cables introduces additional connection points, increasing costs, reducing reliability, and failing to fundamentally optimize the utilization efficiency of three-dimensional space.

[0007] Therefore, there is a lack of existing technologies for a laser processing head control board installation solution that can effectively reduce the size of the control module to meet the needs of equipment miniaturization, while ensuring structural stability, easy assembly, and high reliability. Summary of the Invention

[0008] This application provides a laser processing head and its assembly method, aiming to solve the problem in the prior art of lacking a laser processing head control board installation solution that can effectively reduce the size of the control module to meet the miniaturization requirements of equipment, while ensuring structural stability, simple assembly, and high reliability. To achieve the above objectives, this application proposes a laser processing head. The laser processing head includes: A housing, wherein a mounting cavity is provided within the housing; A control board assembly is disposed within the mounting cavity. The control board assembly includes a main circuit board and at least one limiting member. The main circuit board includes multiple rigid circuit boards and flexible connecting segments connecting adjacent rigid circuit boards. The multiple rigid circuit boards are arranged in a stacked and spaced manner. The at least one limiting member is engaged with the side of the stacked rigid circuit boards to maintain the relative position between each rigid circuit board. Fasteners pass through the control panel assembly to secure the control panel assembly within the mounting cavity; The internal space of the mounting cavity is adapted to the three-dimensional shape of the control board assembly.

[0009] In some embodiments, the number of limiting members is two, which are symmetrically arranged on both sides of the stacked rigid circuit board.

[0010] In some embodiments, each of the rigid circuit boards has at least one limiting hole on its side edge. When the rigid circuit boards are stacked, the limiting holes of each layer are aligned longitudinally to form a longitudinal limiting hole group. The limiting component is a snap-fit ​​strip, which is interference-fitted with the longitudinal limiting hole group.

[0011] In some embodiments, the bottom wall of the mounting cavity is provided with a positioning structure for abutting against the end of the snap-fit ​​strip to restrict the axial movement of the control board assembly within the mounting cavity.

[0012] In some embodiments, the positioning structure is a groove or boss provided on the bottom wall of the mounting cavity, and the end shape of the snap-fit ​​strip matches the shape of the groove or boss.

[0013] In some embodiments, each of the rigid circuit boards is provided with fixing holes, and when the rigid circuit boards are stacked, the fixing holes of each layer are aligned longitudinally; the fastener passes through the aligned fixing holes to fix the control board assembly in the mounting cavity.

[0014] This application also provides a method for assembling a laser processing head, which includes the following steps: S1. A main circuit board including multiple rigid circuit boards and flexible connecting sections is provided. The rigid circuit boards are folded so that they are arranged in a stacked and spaced manner, and at least one limiting member is snapped onto the side of the stacked rigid circuit boards to maintain the relative position between each rigid circuit board, forming a control board assembly. S2. Place the entire control board assembly into the mounting cavity of the housing.

[0015] S3. Secure the control board assembly into the mounting cavity using fasteners.

[0016] In some embodiments, S1 further includes: two limiting members are configured to be aligned with limiting holes that are longitudinally aligned on both sides of each rigid circuit board; pressing the limiting members to make them interference fit with the limiting holes.

[0017] In some embodiments, S2 includes: pushing the control panel assembly into the mounting cavity and causing the end of the limiting member to abut against the positioning structure of the bottom wall of the mounting cavity.

[0018] In some embodiments, S3 includes: The fasteners are passed through longitudinally aligned fixing holes on each layer of rigid circuit board and locked to the bottom or side wall of the mounting cavity.

[0019] This application proposes a laser processing head and its assembly method. The laser processing head includes a housing, a control board assembly, and fasteners. The housing has a mounting cavity. The control board assembly is disposed within the mounting cavity and includes a main circuit board and at least one limiting member. The main circuit board includes multiple rigid circuit boards and flexible connecting segments connecting adjacent rigid circuit boards. The multiple rigid circuit boards are arranged in a stacked, spaced-apart configuration. At least one limiting member engages with the side of the stacked rigid circuit boards to maintain the relative position between them. Fasteners pass through the control board assembly to fix it within the mounting cavity. The internal space of the mounting cavity is adapted to the three-dimensional shape of the control board assembly. This application has the following beneficial effects: (1) By adopting a main circuit board with flexible connecting sections, the rigid circuit board that originally had to be laid flat can be folded into a stacked arrangement along the flexible sections, transforming the traditional two-dimensional planar layout into a three-dimensional utilization, greatly reducing the planar projection area of ​​the control board assembly inside the gun body, thereby making the welding gun smaller and lighter overall. (2) By setting at least one limiting piece to be snapped onto the side of the stacked rigid circuit board, the multi-layer circuit board can be pre-assembled into a structurally regular and relatively stable overall module before being installed into the housing; overcoming the shortcomings of insufficient rigidity of the flexible connection section and difficulty in direct positioning, while transforming the complex internal multi-layer alignment problem into a simple external overall module installation operation, greatly improving assembly efficiency and accuracy.

[0020] (3) The module is finally fixed by fasteners, forming a triple guarantee system of flexible folding to achieve space compression, limiting parts to achieve structural pre-stability, and fasteners to achieve overall strength. While achieving a compact layout, the overall structural rigidity and connection reliability of the control board assembly under handheld vibration conditions are ensured. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the structure of a control board assembly according to an embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the main circuit board when it is not folded; Figure 3 This is a schematic diagram of the structure of a laser processing head according to an embodiment of this application; Figure 4 for Figure 3 Schematic diagram of the mounting cavity in the middle shell; Figure 5 A flowchart illustrating the assembly method of a laser processing head; Wherein: 100-control board assembly; 10-main circuit board; 11-rigid circuit board; 12-flexible connecting section; 20-limiting component; 111-fixing hole; 200-laser processing head; 210-gun body; 220-mounting cavity; 230-positioning structure; 240-fastener. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that, unless otherwise stated or limited, all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] It should also be noted that, unless otherwise stated or limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be an intervening element present. When an element is referred to as "connected to" another element, it may be directly connected to the other element or there may be an intervening element present.

[0025] Furthermore, unless otherwise stated or limited, the descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0026] See Figure 1 and Figure 2 As shown, this application proposes a control board assembly 100. The control board assembly 100 includes a main circuit board 10 and a limiting member 20.

[0027] The main circuit board 10 includes multiple rigid circuit boards 11 and flexible connecting sections 12 connecting adjacent rigid circuit boards 11. The rigid circuit boards 11 serve as the main load-bearing structure, on which electronic components, such as resistors, capacitors, control chips, and interface plugs, are soldered to form a complete control circuit, undertaking core electronic control functions. The core functions of the flexible connecting sections 12 are twofold: first, to provide structural flexibility, allowing the relative positions of the multiple rigid circuit boards 11 to change from planar to three-dimensional, i.e., enabling the multiple rigid circuit boards 11 to be folded and arranged in a stacked, spaced-apart manner; second, through its built-in circuitry, to maintain reliable electrical signal connectivity between the rigid circuit boards 11 even under physical bending. In this application, "multiple" refers to two or more; for example, the number of rigid circuit boards 11 can be two, three, four, or more, with adjacent rigid circuit boards 11 connected by the flexible connecting sections 12.

[0028] At least one limiting member 20 is provided, which engages with the side of the stacked rigid circuit boards 11, applying physical constraints to each layer of the circuit boards and fixing the folded main circuit board 10 into a structurally stable integral module. This ensures the regularity and consistency of the stacked shape and prevents misalignment, sliding, or separation due to vibration or external force during use. Furthermore, by maintaining the relative positions of each rigid circuit board 11, the predetermined spacing between each layer of rigid circuit boards 11 can be precisely maintained, providing a stable accommodating space for the flexible connecting section 12 that naturally bends in the gap. This prevents the flexible connecting section 12 from being damaged by compression, excessive bending, or stress concentration, thus providing protection.

[0029] In summary, the technical solution of this application significantly reduces the projected area occupied by the control board inside the device by folding the planar circuit board into a three-dimensional stacked structure. Furthermore, the limiting member 20 rigidly fixes the folded stacked structure, effectively resisting stress during assembly and use while preventing fatigue damage to the flexible connection section 12 caused by repeated bending or stress concentration, thus improving the product's durability.

[0030] Optionally, two limiting members 20 are provided, symmetrically arranged on both sides of the stacked rigid circuit board 11. This applies a constraint force to the two symmetrical sides, effectively balancing the torque and preventing the stacked rigid circuit board 11 from twisting, tilting, or warping on one side, thus ensuring the stability of the entire control board assembly 100 in three-dimensional space.

[0031] In some embodiments, the limiting member has multiple locking slots along its length, and the side edges of each rigid circuit board 11 are respectively embedded in the corresponding locking slots on the limiting member. It can be understood that when the edge of each rigid circuit board 11 is embedded into the corresponding locking slot, each locking slot can act as a stop for the edge of the embedded rigid circuit board, thereby preventing slight displacement of each layer of rigid circuit board along the stacking direction, thus ensuring that the spacing between all rigid circuit boards 11 is fixed.

[0032] In other embodiments, at least one limiting groove is provided on the side edge of each rigid circuit board 11. When the rigid circuit boards 11 are stacked, the limiting grooves of each layer are aligned longitudinally to form a longitudinal limiting groove group; the limiting member 20 is interference-fitted with the longitudinal limiting groove group. The limiting groove provides a precise and consistent physical alignment reference for all rigid circuit boards 11. When the rigid circuit boards 11 are stacked, the limiting grooves of each layer are aligned longitudinally to form a longitudinal limiting groove group. This longitudinal limiting groove group forms a guiding and constraining channel, allowing the limiting member 20 to pass through it, thereby achieving precise positioning and stable fixation of each layer of circuit boards.

[0033] In some embodiments, the limiting member 20 is a snap-on strip, which has a simple structure and low cost.

[0034] For example, when the retaining strip engages with the limiting groove at the side edge of the rigid circuit board 11, the assembly process is simple and quick; the retaining strip simply needs to be aligned with the limiting groove assembly and pressed in. Specifically, the outer diameter of the retaining strip is slightly larger than the inner diameter of the limiting groove. When the retaining strip is pressed into the limiting groove assembly, it generates continuous radial pressure. This radial pressure creates a tight interference fit between the retaining strip and the inner wall of the limiting groove assembly, thereby eliminating any minor gaps or looseness that may exist between layers and achieving a firm interlayer fixation. In some other embodiments, the limiting member 20 can also be a rigid component such as a pin.

[0035] Among them, the locking strip has at least one locking groove in the middle, which is in the form of a locking groove. With this setting, the middle locking groove directly locks the middle layer of the rigid circuit board 11 in the stacked structure, while the limiting grooves at both ends can cooperate with the upper and lower end housings of the assembly equipment to axially limit the uppermost and lowermost rigid circuit boards 11 and prevent them from moving.

[0036] See Figure 1As shown, optionally, each rigid circuit board 11 is also provided with at least one fixing hole 111, providing an interface for the entire control board assembly 100 to be finally fixed to an external structure (such as the mounting cavity 220 of a handheld welding gun). When the rigid circuit boards 11 are stacked, the fixing holes 111 of each layer are aligned longitudinally, forming a longitudinal channel running through the entire stacked assembly. This allows a single fastener 240 to pass through all the aligned fixing holes 111 at once, directly securing the entire stacked control board assembly 100 as a complete, rigid functional module into the mounting cavity 220 of the external structure, achieving rapid assembly and reliable connection. This completely avoids the cumbersome operation of fixing multiple small circuit boards separately in traditional solutions, greatly simplifying the final assembly process. Preferably, the fixing holes 111 are symmetrically arranged on both sides of the rigid circuit board 11 to ensure balanced force distribution.

[0037] Furthermore, the locking force applied by the through-type fasteners 240 tightly connects all rigid circuit boards 11 to the equipment structure into a whole, providing the strongest vibration and shock resistance and ensuring the absolute reliability of the internal circuit connections. This, along with the internal locking strips, forms a double layer of protection: the internal locking elements 20 prevent interlayer misalignment, while the external fasteners 240 provide overall rigidity and resist external loads.

[0038] In other embodiments, the fixation between the control board assembly 100 and the mounting cavity, such as the processing head, may not rely on the fasteners 240 described above. For example, other methods such as snap-fit, adhesive bonding, interference fit, or heat fusion fixation can be used to fix the control board assembly 100, which has been limited by the limiting member 20, into the mounting cavity 220.

[0039] This application also provides a laser processing head, including a housing and a control board assembly, wherein the housing has an internal mounting cavity, the control board assembly is disposed within the mounting cavity, and the control board assembly includes a main circuit board and at least one limiting member; the main circuit board includes multiple rigid circuit boards and flexible connecting segments connecting adjacent rigid circuit boards; the multiple rigid circuit boards are arranged in a stacked and spaced manner; at least one limiting member is engaged with the side of the stacked rigid circuit boards to maintain the relative position between each rigid circuit board.

[0040] To facilitate clear understanding, the technical solution of this application will be described in detail below using a specific example of a handheld laser welding gun as the processing head. It should be specifically noted that this is merely an illustrative description and is not intended to limit the scope of protection of this application. The laser processing head provided in this application is not limited to a handheld type; it can also cover and be applied to laser cutting heads, welding heads, or other forms of integrated processing modules that are fixedly installed on the end of a machine tool or robotic arm.

[0041] For example, see Figure 3 and Figure 4 As shown, the handheld welding torch 200 includes a torch body 210 (i.e., the housing of the laser processing head), with a mounting cavity 220 inside the torch body 210, and also includes the control board assembly 100 as described above, which is disposed within the mounting cavity 220; wherein, the internal space of the mounting cavity 220 is adapted to the three-dimensional shape of the control board assembly 100. This adapted design means that the mounting cavity 220 has almost no unnecessary redundant space reserved for the control board assembly 100, allowing the control board assembly 100 to fit closely to the mounting cavity 220 of the torch body 210, achieving the most efficient use of the internal space of the torch body 210.

[0042] Since the handheld welding torch 200 adopts all the technical solutions of all embodiments of the control board assembly 100, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0043] Furthermore, the gun body 210 of the handheld welding gun 200 does not need to be designed to be too large in order to accommodate a large circuit board. The volume of the gun body 210 and the size of the internal cavity can be directly reduced, which meets the market's urgent demand for a compact and portable handheld welding gun, and also helps to reduce the overall weight.

[0044] See Figure 4 As shown, optionally, the bottom wall of the mounting cavity 220 is provided with a positioning structure 230 for abutting against the end of the limiting member 20 to restrict the axial movement of the control board assembly 100 within the mounting cavity 220. This positioning structure 230 clearly defines the endpoint of the axial movement of the control board assembly 100 within the mounting cavity 220. During installation, simply push the control board assembly 100 until the end of the limiting member 20 abuts against the positioning structure 230 to indicate that it is in place. Simultaneously, this structure effectively prevents the assembly from retracting or becoming detached due to vibration during equipment use, ensuring a durable and reliable connection.

[0045] Furthermore, the positioning structure 230 is a groove or boss provided on the bottom wall of the mounting cavity 220, and the end shape of the limiting member 20 matches the shape of the groove or boss. The groove can be a groove, notch, or countersunk hole opened on the bottom wall of the mounting cavity 220 to construct a "receiving" positioning structure 230. The boss is a rib, block, or pillar protruding on the bottom wall of the mounting cavity 220 to construct an "insertion" positioning structure 230, and the end of the limiting member 20 is designed with a specific shape to achieve a complementary fit with the groove or boss. For example, if the positioning structure 230 is a rectangular groove, the end of the latching strip may be a corresponding rectangular cross section to achieve anti-rotation; if it is a circular boss, the end may be a sleeve with a circular hole to achieve self-centering.

[0046] This groove / boob + shape matching design, in addition to constraining longitudinal movement, further restricts the movement and rotation of the end of the limiting member 20 in the horizontal plane. This achieves joint constraint on multiple degrees of freedom of the control board assembly 100 within the mounting cavity 220, improving positioning accuracy and stability.

[0047] Additionally, the handheld welding torch 200 includes fasteners 240 that pass through fixing holes 111 on the stacked rigid circuit boards 11 to secure the control board assembly 100 within the mounting cavity 220. Optionally, the fasteners 240 can be standard mechanical connectors such as long screws, bolts, or studs, applying axial clamping force to secure the control board assembly 100 within the mounting cavity 220.

[0048] Through the above pairs Figure 3 and Figure 4 The description of the control board assembly in the handheld welding torch clearly explains the installation and locking methods of the mounting cavity and control board assembly in the processing head.

[0049] It should be emphasized that the technical concept proposed in this application is not limited to the specific form of a handheld welding torch. Its essence is to stably integrate a small-volume control board assembly into the housing of various laser processing heads. Therefore, whether it is a handheld welding torch, a cutting torch, or a processing head fixedly installed on automated equipment, as long as this integration concept is adopted, it should be considered to fall within the protection scope of this application.

[0050] The laser processing head described in this application can be used in various laser processing scenarios such as welding, cutting, and marking. It is compatible with laser sources of different power and has excellent thermal management and electrical isolation performance. The gun body structure incorporates ergonomic design, improving operating comfort and control precision, and meeting the dual requirements of high reliability and high efficiency in industrial settings.

[0051] This application also provides a method for assembling a laser processing head, the method comprising the following steps: Step S1, component pre-assembly step: Provide a main circuit board including multiple rigid circuit boards and flexible connecting sections, fold the rigid circuit boards so that they are arranged in a stacked and spaced manner, and snap at least one limiting member onto the side of the stacked rigid circuit boards to maintain the relative position between each rigid circuit board, forming a control board assembly.

[0052] This step defines the transformation process from a flexible main circuit board to a rigid functional module. It includes reconstructing the form from two-dimensional to three-dimensional through folding; and then locking the unstable folded form into a stable rigid structure through snap-fit ​​limiting components.

[0053] The rigid circuit boards can be two, three, four, or more, and adjacent rigid circuit boards are connected by flexible connecting sections. Specifically, two limiting members are configured, each aligned with a limiting hole along the longitudinal alignment of the two sides of each rigid circuit board. Pressing the limiting members to achieve an interference fit with the limiting holes eliminates any minor gaps or looseness that may exist between layers, achieving a firm interlayer fixation.

[0054] Step S2, component installation step: The control board assembly is placed into the mounting cavity of the housing, and the internal space of the mounting cavity is adapted to the three-dimensional shape of the control board assembly.

[0055] In this step, the pre-assembled, regularly shaped control panel assembly is quickly and precisely docked with the specially designed mounting cavity. The control panel assembly fits snugly into the housing mounting cavity, maximizing the use of the gun's internal space.

[0056] This can be achieved by pushing the control board assembly into the mounting cavity and abutting the end of the latching strip against the positioning structure on the bottom wall of the mounting cavity. This prevents the control board assembly from retracting or loosening due to vibration during equipment use, ensuring a durable and reliable connection. Specifically, the positioning structure can be a groove or boss on the bottom wall of the mounting cavity, with the end shape of the limiting member matching the shape of the groove or boss. This achieves combined constraint of multiple degrees of freedom for the control board assembly within the mounting cavity, improving positioning accuracy and stability.

[0057] Step S3, Fastening step: Secure the control board assembly into the mounting cavity using fasteners.

[0058] In this step, a reliable connection between the control panel assembly and the gun body is achieved through a simple tightening operation.

[0059] Specifically, it can involve passing fasteners through longitudinally aligned mounting holes on each layer of rigid circuit board and locking them to the bottom or side walls of the mounting cavity. The fasteners can be standard mechanical connectors such as long screws, bolts, or studs, applying axial clamping force to secure the control board assembly within the mounting cavity.

[0060] In summary, this application adopts a scheme of pre-assembling a compact three-dimensional module using a foldable rigid-flex circuit board and limiting components, and then installing and fixing it as a whole. This significantly reduces the space occupied by the control board while ensuring ease of assembly and structural stability, thereby effectively realizing the miniaturization, weight reduction and high reliability of the laser processing head.

[0061] It should be noted that the laser processing head and its assembly method described in this application are closely related and complementary in terms of technical solutions. They both originate from the same inventive concept and are complete expositions of the same technical solution from different perspectives. Any implementation that combines the structural features of the control board assembly 100 with the step features of the assembly method should be considered to fall within the scope of the same inventive concept sought to be protected in this application.

[0062] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A laser processing head, characterized in that, include: A housing, wherein a mounting cavity is provided within the housing; A control board assembly is disposed within the mounting cavity. The control board assembly includes a main circuit board and at least one limiting member. The main circuit board includes multiple rigid circuit boards and flexible connecting segments connecting adjacent rigid circuit boards. The multiple rigid circuit boards are arranged in a stacked and spaced manner. The at least one limiting member is engaged with the side of the stacked rigid circuit boards to maintain the relative position between the rigid circuit boards.

2. The laser processing head according to claim 1, characterized in that, The number of limiting members is two, which are symmetrically arranged on both sides of the stacked rigid circuit board.

3. The laser processing head according to claim 1, characterized in that, The limiting member has multiple locking slots along its length, and the side of each rigid circuit board is respectively embedded in the corresponding locking slot on the limiting member.

4. The laser processing head according to claim 2 or 3, characterized in that, The bottom wall of the mounting cavity is provided with a positioning structure for abutting against the end of the buckle strip to restrict the axial movement of the control board assembly within the mounting cavity.

5. The laser processing head according to claim 4, characterized in that, The positioning structure is a groove or boss provided on the bottom wall of the mounting cavity, and the end shape of the limiting member matches the shape of the groove or boss.

6. The laser processing head according to claim 1, characterized in that, Each of the rigid circuit boards is provided with fixing holes. When the rigid circuit boards are stacked, the fixing holes of each layer are aligned longitudinally. The fastener passes through the aligned fixing holes to fix the control board assembly in the mounting cavity.

7. A method for assembling a laser processing head, characterized in that, Includes the following steps: S1. A main circuit board including multiple rigid circuit boards and flexible connecting sections is provided. The rigid circuit boards are folded so that they are arranged in a stacked and spaced manner, and at least one limiting member is snapped onto the side of the stacked rigid circuit boards to maintain the relative position between each rigid circuit board, forming a control board assembly. S2. Place the entire control board assembly into the mounting cavity of the housing; S3. Secure the control board assembly into the mounting cavity using fasteners.

8. The assembly method according to claim 7, characterized in that, The S1 further includes: two limiting members are configured, respectively aligned with the longitudinal edges on both sides of each rigid circuit board; pressing the limiting members to make them interference fit with the edges on both sides of the rigid circuit board.

9. The assembly method according to claim 7, characterized in that, S2 includes: pushing the control panel assembly into the mounting cavity and causing the end of the limiting member to abut against the positioning structure of the bottom wall of the mounting cavity.

10. The assembly method according to claim 7, characterized in that, S3 includes: The fasteners are passed through longitudinally aligned fixing holes on each layer of rigid circuit board and locked to the bottom or side wall of the mounting cavity.

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