Automatic offset feedback laser soldering head for camera processing

Abstract

The invention relates to the technical field of laser tin soldering, in particular to an automatic offset feedback laser tin soldering head for camera machining, which comprises an anti-burning cover mechanism, the anti-burning cover mechanism comprises a cover cylinder and a movable cover assembly, the cover cylinder is fixedly arranged, and the movable cover assembly is rotatably connected to the bottom of the cover cylinder and used for sealing or opening a bottom opening of the cover cylinder. And the anti-burning cover mechanism is used for sealing the end part of the laser welding head body in a non-working state, and is automatically opened when an operator does not open the laser welding head body and directly starts the laser. The anti-burning cover mechanism is automatically unlocked through thermal deformation of the double metal elastic pieces, the safety risk of laser false starting is effectively avoided, the linkage driving assembly is opened through the cover body to conduct the air path, and dynamic air curtain protection in the working state and physical sealing in the non-working state are formed.

Description

Technical Field

[0001] This invention relates to the field of laser soldering technology, specifically to a laser soldering head for camera processing with automatic offset feedback. Background Technology

[0002] Laser soldering technology, a key process in precision electronic assembly, is widely used in the packaging and connection of precision components such as camera modules and microelectronic components due to its advantages of concentrated energy, small heat-affected zone, and high processing precision. The laser welding head, as the core component of this technology, has an end-mounted lens (or protective lens) responsible for the final transmission and focusing of the laser beam. Its cleanliness and integrity directly determine the stability of the welding quality and the lifespan of the equipment.

[0003] In practical industrial applications, existing laser welding heads mainly face the following technical problems: First, the fumes and spatter generated during welding contaminate the surface of the end-eye mirror. This contamination leads to laser energy attenuation and beam distortion, thus affecting the welding quality. Although existing technologies generally employ shielding gas purging schemes, gas path control often relies on external control systems, which carries the risk of response delays or timing mismatches, affecting the protective effect.

[0004] Secondly, when the equipment is not in operation, the end-lens lacks an effective automatic protection mechanism. Currently, it mainly relies on manual installation of dust covers, which is prone to oversight, exposing precision optical components to the workshop environment and increasing the risk of contamination. More importantly, if operators forget to remove the dust covers and start the equipment directly, the laser operating in a confined space will pose a serious safety hazard. Most existing protective devices lack a safety interlock mechanism with the laser system, and cannot effectively prevent the risk of equipment damage caused by such misoperation. Summary of the Invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of this invention is to provide a laser soldering head for camera processing with automatic offset feedback, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A laser soldering head for camera processing with automatic offset feedback includes a laser soldering head body with an end lens mounted on its end. It further includes: a burn-proof cover mechanism comprising a cover cylinder and a movable cover assembly; the cover cylinder is fixedly mounted, and the movable cover assembly is rotatably connected to the bottom of the cover cylinder for sealing or opening the bottom opening of the cover cylinder; the burn-proof cover mechanism is used to close the end of the laser soldering head body in a non-working state and automatically opens when the laser is started directly without being opened by the operator; and an airtight mechanism for ejecting gas during laser soldering head operation to repel external impurities from contacting the end lens; wherein the burn-proof cover mechanism cooperates with the airtight mechanism, and the opening action of the burn-proof cover mechanism triggers the operation of the airtight mechanism.

[0007] Preferably, the anti-burn cap mechanism further includes a locking element and a spring, the locking element being rotatably connected to the cap cylinder, and the spring being used to apply a continuous torsional force to the locking element, causing it to tend to rotate in a first direction.

[0008] Preferably, the locking element is provided with protruding locking teeth, and the movable cover assembly is provided with an end bracket. When the movable cover assembly is in the closed position, the protruding locking teeth are engaged in the locking groove of the end bracket under the action of the spring to achieve locking.

[0009] Preferably, the movable cover assembly includes a cover body and a bimetallic spring plate mounted thereon. The bimetallic spring plate is provided with a spring rod. When the laser irradiates the bimetallic spring plate in the closed state, the bimetallic spring plate deforms due to heat and pushes the spring rod. The spring rod is used to push the locking piece to rotate in the opposite direction against the force of the spring, so that the convex locking tooth disengages from the locking groove of the end frame, thereby realizing the automatic opening of the movable cover assembly.

[0010] Preferably, the cover cylinder is provided with a magnetic protrusion, and the movable cover assembly is provided with a cooperating magnet. When the movable cover assembly is rotated to the open position, it is locked by the attraction between the magnetic protrusion and the cooperating magnet.

[0011] Preferably, the airtight mechanism includes a middle cylinder, an inner jet box, an internal pipe, and a drive assembly. The inner jet box is disposed inside the middle cylinder and has a gas nozzle on its surface for ejecting gas. One end of the internal pipe is connected to the inner jet box, and the other end is used to connect to an external gas source.

[0012] Preferably, the drive assembly includes a long rod and a blocking plate. The blocking plate is slidably disposed in the middle cylinder and has a through hole for controlling the opening and closing of the internal air passage. A spring is connected between the long rod and the middle cylinder for giving the blocking plate a tendency to disconnect the internal air passage.

[0013] Preferably, when the anti-burn cover mechanism is opened, its movable cover assembly pushes the long rod to move, thereby causing the blocking plate to slide to the position where its through hole communicates with the built-in pipe, so that the gas from the external gas source can be ejected through the built-in pipe and the inner jet box.

[0014] Preferably, when the movable cover assembly of the anti-burn cover mechanism is locked in the open position by magnetic attraction, it continuously presses the long rod of the drive assembly to maintain the air passage.

[0015] Preferably, the gas nozzles on the surface of the inner jet box are in multiple sets and arranged in a ring, for spraying a uniform air curtain into the middle cylinder.

[0016] Preferably, when the movable cover assembly is in the closed state, the drive assembly is reset under the action of the spring, blocking the air passage of the built-in tube, and the airtight mechanism stops working.

[0017] Preferably, during the process of the movable cover assembly being automatically opened due to misoperation triggered by the bimetallic spring, the opening action of the movable cover assembly synchronously triggers the drive component, causing the airtight mechanism to start and eject gas.

[0018] Compared with the prior art, the beneficial effects of the present invention are: The mechanical unlocking mechanism is driven by the thermal deformation of the bimetallic spring. When the laser is accidentally started in the off state, the anti-burn cover mechanism can be opened automatically, avoiding the risk of equipment damage or fire that may be caused by the laser working in a confined space. The opening action of the anti-burn cover mechanism directly controls the air passage of the airtight mechanism through the drive component, ensuring that the protective gas is supplied only when the welding head is working, thus simplifying the operation process. The anti-burn cover mechanism provides a physical seal when not in operation to prevent dust contamination, while the airtight mechanism forms an air curtain when in operation to effectively block welding fumes and spatter, together ensuring the cleanliness of the end lens and the stability of the beam quality. The core locking, sensing, and linkage mechanisms are all implemented by mechanical components such as cards, springs, bimetallic springs, and long rods. The structure is robust, has strong anti-interference capabilities, and is suitable for long-term stable operation in industrial environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a cross-sectional structural schematic diagram of the laser welding head body, end mirror, anti-burn cap mechanism and airtight mechanism of the present invention; Figure 4This is a schematic diagram of the internal structure of the anti-burning cover mechanism and the airtight mechanism of the present invention; Figure 5 This is a schematic diagram of the side structure of the anti-burning cap mechanism and the airtight mechanism of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the structure of the anti-burn cap mechanism of the present invention; Figure 7 This is a schematic diagram of the side structure of the anti-burning cap mechanism and the airtight mechanism of the present invention. Figure 2 .

[0020] In the diagram: 11. Laser welding head body; 12. End end mirror; 2. Anti-burn cap mechanism; 21. Cap cylinder; 211. Ear bracket one; 212. Ear bracket two; 213. Magnetic convex block; 22. Movable cap assembly; 221. Cap body; 222. Bimetallic spring; 223. Clamping ring; 224. End end frame; 225. Spring rod; 23. Clamping piece; 231. Protruding clamping tooth; 24. Crank spring; 3. Airtight mechanism; 31. Middle cylinder; 32. Inner air jet box; 33. Internal tube; 34. Drive assembly; 341. Long rod; 342. Blocking plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] One embodiment provided by the present invention: refer to Figure 1 and Figure 2 As shown, a laser soldering head for camera processing with automatic offset feedback includes a laser soldering head body 11, and an end lens 12 is installed at the end of the laser soldering head body 11.

[0023] The laser welding head 11 integrates a vision sensor and a position feedback module, which are used to capture workpiece features in real time during the welding process. When a deviation is detected between the weld point position and the preset path, the module can drive the internal fine-tuning mechanism to automatically correct the position of the laser beam focus relative to the workpiece, thereby achieving automatic offset feedback and compensation for welding accuracy.

[0024] This also includes: refer to Figure 3 - Figure 7 As shown, the anti-burn cover mechanism 2 and the airtight mechanism 3 cooperate with each other; The airtight mechanism 3 is installed at the end of the laser welding head 11. The airtight mechanism 3 is used to discharge gas and exclude external impurity gas from entering the laser welding head 11 contact end mirror 12 when the laser welding head 11 is in use. The airtight mechanism 3 includes a middle cylinder 31, an inner air jet box 32 is installed inside the middle cylinder 31, and a gas nozzle is provided on the surface of the inner air jet box 32. An internal tube 33 is provided inside the middle cylinder 31, and a drive assembly 34 is provided on the side of the middle cylinder 31.

[0025] The inner jet box 32 has multiple sets of gas nozzles on its surface, and these multiple sets of gas nozzles are installed in a ring with the inner jet box 32. One end of the built-in tube 33 is connected to the inner jet box 32, and the other end of the built-in tube 33 is located on the surface of the middle cylinder 31 for connecting to an external gas pipe.

[0026] The drive assembly 34 includes a long rod 341 and a blocking plate 342. The blocking plate 342 is slidably connected to the middle cylinder 31 via a groove. The blocking plate 342 has a hole. A spring is connected between the long rod 341 and the middle cylinder 31. When the long rod 341 and the blocking plate 342 move toward the middle cylinder 31 to their extreme positions, the hole in the blocking plate 342 communicates with the internal tube 33, allowing gas to pass through the internal tube 33 and enter the inner jet box 32. When the long rod 341 and the blocking plate 342 do not move, the hole in the blocking plate 342 and the internal tube 33 are misaligned, thereby blocking the flow of gas.

[0027] When the drive component 34 is connected to the built-in tube 33, the gas in the gas tank is discharged into the built-in tube 33 through the pressure valve and the gas pipe, and then enters the inner jet box 32 through the built-in tube 33. The gas is then sprayed into the middle cylinder 31 through the gas nozzle on the inner jet box 32. The sprayed gas will prevent the fumes generated in the solder from contacting the end mirror 12 inside the laser welding head 11.

[0028] The anti-burn cover mechanism 2 is installed at the bottom of the airtight mechanism 3. The anti-burn cover mechanism 2 is used to close the laser welding head 11 when it is not in use, and can be opened when it is in use. It will also automatically open to prevent fire if the laser welding head 11 is not opened before operation.

[0029] The anti-burning cap mechanism 2 includes a cap cylinder 21. The left side of the cap cylinder 21 is provided with a second ear bracket 212, and the right side of the cap cylinder 21 is provided with a first ear bracket 211. The bottom of the cap cylinder 21 is rotatably connected to a movable cap assembly 22. The movable cap assembly 22 is used to seal the cap cylinder 21. The movable cap assembly 22 includes a cap body 221. One side of the cap body 221 is rotatably connected to the second ear bracket 212. A clamping ring 223 is bolted to the cap body 221, and a bimetallic spring 222 is pressed in the clamping ring 223.

[0030] It should be noted that the bimetallic spring 222 is a technology used in the prior art. The most similar technology is the bimetallic strip in an electric kettle, which is mainly composed of two different metals. When heated, the middle part will curl up. This structure can be purchased directly in practice.

[0031] The bimetallic spring 222 is provided with a spring rod 225, which slides in contact with an end bracket 224. The end bracket 224 is fixedly connected to the cover body 221. A locking member 23 is provided on one side of the ear bracket 211. The locking member 23 is rotatably connected to the ear bracket 211. A spring 24 is connected between the locking member 23 and the ear bracket 211. The spring 24 continuously releases force to rotate the locking member 23 clockwise. The ear bracket 211 is provided with a limit stop corresponding to the locking member 23. A protruding locking tooth 231 is fixedly connected to the side of the locking member 23. The protruding locking tooth 231 and the end bracket 224 are in contact through a locking groove.

[0032] The cover cylinder 21 has a magnetic protrusion 213 on the side near the ear bracket 212, and the cover body 221 has a matching magnet corresponding to the magnetic protrusion 213.

[0033] When the laser welding head 11 is not used for an extended period, the movable cover assembly 22 is rotated to cover the bottom of the cover cylinder 21, preventing dust and impurities from entering. During the rotation of the cover body 221, the end bracket 224 contacts the protruding teeth 231. As the cover body 221 continues to rotate, the end bracket 224 pushes open the protruding teeth 231, causing the protruding teeth 231 to rotate counterclockwise. This is because the side of the protruding teeth 231 is beveled. When the movable cover assembly 22 is completely placed on the bottom of the cover cylinder 21, the spring 24 between the locking piece 23 and the ear bracket 211 releases its stored force, causing the locking piece 23 to rotate clockwise. This allows the protruding teeth 231 to insert into the slot of the end bracket 224. Under the continuous action of the spring 24, the movable cover assembly 22 is closed at the bottom of the cover cylinder 21, preventing external gas from entering the laser welding head 11 through the anti-burn cover mechanism 2 and the airtight mechanism 3.

[0034] It should be noted that the rotation direction described in this instruction manual is for reference only. Figure 3 As shown.

[0035] When the laser welding head 11 needs to be used, the locking piece 23 is turned counterclockwise by bending it. At this time, the spring 24 is deformed by storing force, and the protruding locking tooth 231 is disengaged from the slot of the end frame 224. Then, the movable cover assembly 22 will automatically open under the action of gravity. After the movable cover assembly 22 rotates ninety degrees, the movable cover assembly 22 will be locked by magnetic attraction with the magnetic protrusion 213.

[0036] In practical use, operators sometimes forget to open the movable cover assembly 22 and directly start the laser welding head 11. The laser welding head 11 irradiates the bimetallic spring 222, causing it to heat up. The middle of the bimetallic spring 222 tilts upwards, pushing the spring rod 225 to slide within the end frame 224. One end of the spring rod 225 then passes through the end frame 224, pushing the locking piece 23 to rotate counterclockwise. During this counterclockwise rotation, the protruding locking teeth 231 disengage from the end frame 224, allowing the movable cover assembly 22 to rotate and open under its own weight. Finally, it is locked in place by the magnetic protrusion 213. This design avoids the risk that starting the laser welding head 11 could cause the unopened anti-burn cover mechanism 2 to catch fire, potentially leading to an overall fire.

[0037] Each time the magnetic protrusion 213 and the movable cover assembly 22 are magnetically attracted, the movable cover assembly 22 will push the long rod 341 in the drive assembly 34 to move towards the middle cylinder 31. In turn, the long rod 341 will drive the blocking plate 342 to move, so that the built-in tube 33 is open, and the gas in the gas storage tank can be ejected to prevent external gas from entering.

[0038] Working principle: In the non-operating state, the movable cover assembly 22, under the action of the spring 24 on the locking piece 23 and the convex locking teeth 231, tightly covers the bottom of the cover cylinder 21, forming a physical seal and effectively preventing dust and other impurities from entering and contaminating the end lens 12 inside the laser welding head body 11. At this time, the drive assembly 34 is not triggered, and the long rod 341, under the action of the spring, causes the hole on the blocking plate 342 to be misaligned with the built-in tube 33, and the air passage is in a closed state.

[0039] When normal operation is required, the operator manually pries the locking piece 23, causing the protruding locking teeth 231 to disengage from the slots of the end frame 224. The movable cover assembly 22 then automatically rotates downwards and opens under gravity. When it rotates approximately ninety degrees, the magnets on the cover body 221 and the magnetic protrusions 213 on the cover cylinder 21 attract each other, achieving a stable locking state. During the full opening of the movable cover assembly 22, the cover body 221 pushes the long rod 341 of the drive assembly 34, overcoming the spring force and moving towards the middle cylinder 31. This causes the blocking plate 342 to slide, connecting its hole with the internal tube 33. The air passage is then opened, and the protective gas from the external gas tank passes sequentially through the internal tube 33 and the internal air jet box 32, finally being evenly sprayed from its annular gas nozzle, forming a gas barrier below the end mirror 12. This effectively repels fumes and spatter generated during welding, ensuring the cleanliness of the end mirror 12.

[0040] To address the possibility of operator error in activating the laser without opening the movable cover assembly 22, this invention incorporates an automatic safety opening mechanism. The heat emitted by the laser raises the temperature of the irradiated bimetallic spring 222. Due to the difference in thermal expansion coefficients, the middle of the bimetallic layer warps, pushing the spring rod 225 to slide within the end frame 224. The end of the spring rod 225 then pushes against the locking member 23, causing it to rotate counterclockwise against the force of the spring 24, forcing the protruding locking tooth 231 to disengage from the slot in the end frame 224. Once disengaged, the movable cover assembly 22 automatically opens under its own weight and is positioned by the magnetic protrusion 213, simultaneously opening the air passage of the airtight mechanism 3. This process effectively avoids the fire risk that may arise from the laser operating in a confined space, achieving passive safety protection.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A laser soldering head for camera processing with automatic offset feedback, comprising a laser soldering head body, wherein an end mirror is mounted on the end of the laser soldering head body, characterized in that, Also includes: The anti-burn cover mechanism includes a cover cylinder and a movable cover assembly. The cover cylinder is fixedly installed, and the movable cover assembly is rotatably connected to the bottom of the cover cylinder for sealing or opening the bottom opening of the cover cylinder. The anti-burn cover mechanism is used to close the end of the laser welding head body in the non-working state and automatically open when the laser is started directly without being opened by the operator. An airtight mechanism is provided for ejecting gas during laser welding head operation to repel external impurities from contacting the end lens. The anti-burn cover mechanism works in conjunction with the airtight mechanism, so that the opening action of the anti-burn cover mechanism triggers the operation of the airtight mechanism.

2. The laser soldering head for camera processing with automatic offset feedback according to claim 1, characterized in that: The anti-burn cap mechanism also includes a locking element and a spring. The locking element is rotatably connected to the cap cylinder, and the spring is used to apply a continuous torsional force to the locking element, causing it to tend to rotate in a first direction.

3. The laser soldering head for camera processing with automatic offset feedback according to claim 2, characterized in that: The card is provided with protruding teeth, and the movable cover assembly is provided with an end bracket. When the movable cover assembly is in the closed position, the protruding teeth are engaged in the slot of the end bracket under the action of the spring to achieve locking.

4. The laser soldering head for camera processing with automatic offset feedback according to claim 1, characterized in that: The movable cover assembly includes a cover body and a bimetallic spring plate mounted thereon. The bimetallic spring plate is provided with a spring rod. When the laser irradiates the bimetallic spring plate in the closed state, the bimetallic spring plate deforms due to heat and pushes the spring rod. The spring rod is used to push the locking piece to rotate in the opposite direction against the force of the spring, so that the convex locking tooth disengages from the locking groove of the end frame, thereby realizing the automatic opening of the movable cover assembly.

5. The laser soldering head for camera processing with automatic offset feedback according to claim 1, characterized in that: The cover cylinder is provided with a magnetic protrusion, and the movable cover assembly is provided with a matching magnet. When the movable cover assembly is rotated to the open position, it is locked by the attraction between the magnetic protrusion and the matching magnet.

6. The laser soldering head for camera processing with automatic offset feedback according to claim 1, characterized in that: The airtight mechanism includes a middle cylinder, an inner jet box, an internal pipe, and a drive assembly. The inner jet box is disposed inside the middle cylinder and has a gas nozzle on its surface for ejecting gas. One end of the internal pipe is connected to the inner jet box, and the other end is used to connect to an external gas source.

7. The laser soldering head for camera processing with automatic offset feedback according to claim 6, characterized in that: The drive assembly includes a long rod and a blocking plate. The blocking plate is slidably disposed in the middle cylinder and has a through hole for controlling the opening and closing of the internal air passage. A spring is connected between the long rod and the middle cylinder to make the blocking plate tend to disconnect the internal air passage.

8. The laser soldering head for camera processing with automatic offset feedback according to claim 7, characterized in that: When the anti-burn cover mechanism is opened, its movable cover assembly pushes the long rod to move, thereby causing the blocking plate to slide to the position where its through hole connects with the built-in pipe, so that the gas from the external gas source can be ejected through the built-in pipe and the inner jet box.

9. A laser soldering head for camera processing with automatic offset feedback according to claim 8, characterized in that: When the movable cover assembly of the anti-burn cover mechanism is locked in the open position by magnetic attraction, it continuously presses the long rod of the drive assembly to maintain the conduction of the air passage.

10. A laser soldering head for camera processing with automatic offset feedback according to claim 6, characterized in that: The gas nozzles on the surface of the inner jet box are in multiple sets and arranged in a ring, used to spray a uniform air curtain into the middle cylinder.

11. The laser soldering head for camera processing with automatic offset feedback according to claim 7, characterized in that: When the movable cover assembly is in the closed state, the drive assembly is reset under the action of the spring, blocking the air passage of the built-in tube, and the airtight mechanism stops working.

12. The laser soldering head for camera processing with automatic offset feedback according to claim 4, characterized in that: During the process of the movable cover assembly being automatically opened due to misoperation triggered by the bimetallic spring, the opening action of the movable cover assembly synchronously triggers the drive component, causing the airtight mechanism to start and eject gas.

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