Hot air brush for removing tin beads on PCB (Printed Circuit Board)

Abstract

The utility model discloses a hot air brush for removing tin beads on a PCB, and relates to the field of hot air brushes, the hot air brush comprises a case, a brush, a fixing assembly, a rotating shaft and a heating assembly, the fixing assembly comprises a connecting base, a connecting plate, a second plug pin, a connecting disc and a spring, and the heating assembly comprises a connecting frame, an inserting block, a connecting block and a heating element; and when the hot air brush needs to be replaced, the second plug pin is pulled to compress the spring, so that the second plug pin is separated from the connecting plate, the hot air brush can be pulled out of the connecting seat, and the hot air brush is convenient to replace. After the heating element is driven to be pulled out from the interior of the case by pulling out the connecting frame, the damaged heating element can be replaced, a new heating element is inserted into the inserting groove in the outer surface of the inserting block to complete replacement of the heating element, and the heating element is convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the field of hot air brush technology, and in particular to a hot air brush for removing solder balls from PCB boards. Background Technology

[0002] PCB, or printed circuit board, is one of the most important components in the electronics industry. Almost every electronic device, from small electronic watches and calculators to large computers, communication electronic devices, and military weapon systems, uses PCBs to make electrical connections between various electronic components such as integrated circuits. When designing circuits on the surface of the PCB, solder bars are needed to solder the connection points.

[0003] After the PCB board is produced, it needs to be tested. If it fails the test or cannot be used due to circuit problems, it needs to be reworked. At this time, a hot air brush is needed to remove the solder balls. The hot air and the rotation of the brush melt the solder balls on the surface of the circuit board and then brush them off, so as to facilitate subsequent re-production.

[0004] When hot air brushes remove solder balls, the molten solder balls adhere to the brush surface, thus removing the solder balls from the PCB board surface. The removed solder balls remain on the brush surface, requiring regular cleaning and replacement of the brush. However, the existing hot air brushes have the brush part fixed to the top of the chassis, requiring the entire top of the chassis to be disassembled for replacement, which is quite troublesome. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a hot air brush for removing solder balls from PCB boards.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a hot air brush for removing solder beads from PCB boards, including a chassis, a brush on the top of the chassis, a fixing component at the bottom of the brush, a rotating shaft inserted inside the chassis, and two heating components inserted inside the chassis.

[0009] The fixed assembly includes a connector movably connected to the top of the chassis. The lower surface of the connector is fixedly connected to the top end of the rotating shaft. A connecting plate is slidably connected to the upper surface of the connector. The upper surface of the connecting plate is fixedly connected to the bottom of the brush. Several second pins are inserted inside the connector. A connecting plate is fixedly connected to the outer surface of the second pins. A spring is fixedly connected to the upper surface of the connecting plate. The top end of the spring is fixedly connected to the inner wall of the connector. The upper surface of the connecting plate has a socket that mates with the second pins.

[0010] The heating assembly includes a connecting frame that is slidably connected inside the chassis. Several plug-in blocks are fixedly connected to the inner wall of the connecting frame. Connecting blocks are movably connected to the outer surface of the plug-in blocks. A heating element is fixedly connected to the side of the connecting block away from the plug-in block.

[0011] As a preferred embodiment of the hot air brush for removing solder balls from PCB boards according to this utility model, a geared motor is fixedly connected to the bottom of the inner cavity of the chassis, the output end of the geared motor is fixedly connected to the bottom end of the rotating shaft, a partition is fixedly connected to the inner wall of the chassis, a fan is provided on the upper surface of the partition, and ventilation holes are provided on the back of the chassis.

[0012] As a preferred embodiment of the hot air brush for removing solder balls from PCB boards according to this utility model, the upper surface of the connecting base is slidably connected with a baffle, the radius of the baffle is the same as the radius of the connecting plate, both ends of the baffle are provided with notches to facilitate the insertion of the connecting plate, and the bottom end of the second pin is provided with a rounded corner.

[0013] As a preferred embodiment of the hot air brush for removing solder balls from PCB boards according to this utility model, two first pins are interlaced on the outer surface of the connecting base, and magnets are fixedly connected to the outer surface of the first pins. The outer surface of the enclosure has a round hole that mates with the first pins. The upper surface of the connecting base is provided with three limiting strips, and the connecting plate slides on the outer surface of the limiting strips.

[0014] As a preferred embodiment of the hot air brush for removing solder balls from PCB boards according to this utility model, the outer surface of the chassis is provided with a rectangular through hole for the sliding of the heating component, the outer surface of the connecting frame is provided with a sliding groove, the inner wall of the chassis is fixedly connected with a slide rail that cooperates with the sliding groove, and the rotating shaft passes through the interior of the slide rail.

[0015] As a preferred embodiment of the hot air brush for removing solder beads from PCB boards according to this utility model, the plug block is provided with a slot that mates with the connecting block on the side near the connecting block, and two connecting rods are fixedly connected to the outer surface of the connecting frame, with a pull rod fixedly connected to the end of the two connecting rods away from the connecting frame.

[0016] (III) Beneficial Effects

[0017] This invention provides a hot air brush for removing solder balls from PCB boards. It has the following beneficial effects:

[0018] 1. The hot air brush is installed by inserting the connecting plate into the connecting seat through the limiting strip, and then fixing the connecting plate inside the connecting seat through the cooperation of the second pin and the spring. When the hot air brush needs to be replaced, the second pin is pulled to compress the spring, thereby disengaging the second pin from the connecting plate, and the hot air brush can be pulled out from the connecting seat for easy replacement.

[0019] 2. The outer surface of the chassis is provided with rectangular through holes, which allow the connecting frame to be pulled out through the rectangular through holes. After the heating element is pulled out from inside the chassis by the connecting frame, the damaged heating element can be replaced. The new heating element is inserted into the slot on the outer surface of the plug block to complete the replacement of the heating element, which is convenient for the maintenance of the heating element. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the internal structure of the chassis of this utility model.

[0023] Figure 3 This is an exploded structural diagram of the fixing component of this utility model.

[0024] Figure 4 This is a cross-sectional structural diagram of the fixing component of this utility model.

[0025] Figure 5 This is a schematic diagram of the heating component of this utility model.

[0026] Figure 6 This is an exploded structural diagram of the plug-in block of this utility model.

[0027] In the diagram, 1. Chassis; 2. Heating assembly; 201. Connecting frame; 202. Slide groove; 203. Connecting rod; 204. Pull rod; 205. Heating element; 206. Insertion block; 207. Slot; 208. Connecting block; 3. Gear motor; 4. Fixing assembly; 401. Connecting plate; 402. Connecting seat; 403. First pin; 404. Limiting strip; 405. Enclosure; 406. Magnet; 407. Connecting plate; 408. Spring; 409. Second pin; 5. Brush; 6. Partition; 7. Rotating shaft. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] Example 1

[0030] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the first embodiment of the present invention. This embodiment provides a hot air brush for removing solder balls from a PCB board, including a chassis 1. A brush 5 is provided on the top of the chassis 1, and a fixing component 4 is provided on the bottom of the brush 5. A rotating shaft 7 is inserted inside the chassis 1. Two heating components 2 are inserted inside the chassis 1. The fixing component 4 includes a connecting seat 402 movably connected to the top of the chassis 1. The lower surface of the connecting seat 402 is fixedly connected to the top of the rotating shaft 7. A connecting plate 401 is slidably connected to the upper surface of the connecting seat 402. The upper surface of the connecting plate 401 is fixedly connected to the bottom of the brush 5. A plurality of second pins 409 are inserted inside the connecting seat 402. A connecting plate 407 is fixedly connected to the outer surface of the second pins 409. A spring 408 is fixedly connected to the upper surface of the connecting plate 407. The top of the spring 408 is fixedly connected to the inner wall of the connecting seat 402. The upper surface of the connecting plate 401 has a socket that cooperates with the second pins 409.

[0031] Specifically, a geared motor 3 is fixedly connected to the bottom of the inner cavity of the chassis 1. The output end of the geared motor 3 is fixedly connected to the bottom end of the rotating shaft 7. A partition 6 is fixedly connected to the inner wall of the chassis 1. A fan is provided on the upper surface of the partition 6. A ventilation hole is provided on the back of the chassis 1. A barrier 405 is slidably connected to the upper surface of the connecting seat 402. The radius of the barrier 405 is the same as the radius of the connecting plate 401. Notches are provided at both ends of the barrier 405 to facilitate the insertion of the connecting plate 401. The bottom end of the second pin (409) is rounded. Two first pins 403 are inserted through the outer surface of the connecting seat 402. A magnet 406 is fixedly connected to the outer surface of the first pins 403. A round hole that mates with the first pins 403 is provided on the outer surface of the barrier 405. Three limiting strips 404 are provided on the upper surface of the connecting seat 402. The connecting plate 401 slides on the outer surface of the limiting strips 404.

[0032] Furthermore, after the connecting plate 407 is inserted into the connecting seat 402 via the limiting strip 404 on the upper surface of the connecting seat 402, as the connecting plate 407 slides on the surface of the limiting strip 404, the rounded corner at the bottom of the second pin 409 causes the second pin 409 to lift upwards. The second pin 409 drives the connecting plate 407 to compress the spring 408, thereby causing the second pin 409 to retract into the connecting seat 402, allowing the connecting plate 401 to pass through. Under the action of the spring 408, the second pin 409 is inserted into the insertion hole on the upper surface of the connecting plate 407, thereby achieving a fixed connection. The connecting plate 407 is connected, and then the enclosure 405 is rotated to the outside to fix the outside of the connecting plate 407. After the enclosure 405 is rotated to the outside, the first pin 403 is inserted into the insertion hole on the outer surface of the connecting seat 402, so that the first pin 403 cooperates with the round hole on the outer surface of the enclosure 405. The material of the connecting seat 402 can attract the magnet 406. Through the cooperation between the magnet 406 on the outer surface of the first pin 403 and the connecting seat 402, the enclosure 405 is fixed. Then, the geared motor 3 drives the rotating shaft 7 to rotate, thereby driving the connecting seat 402 to rotate, realizing the rotation of the brush 5.

[0033] Example 2

[0034] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The heating component 2 includes a connecting frame 201 that is slidably connected inside the casing 1. A plurality of plug-in blocks 206 are fixedly connected to the inner wall of the connecting frame 201. A connecting block 208 is movably connected to the outer surface of the plug-in block 206. A heating element 205 is fixedly connected to the side of the connecting block 208 away from the plug-in block 206.

[0035] Specifically, the outer surface of the chassis 1 has a rectangular through hole for the sliding of the heating component 2, the outer surface of the connecting frame 201 has a sliding groove 202, the inner wall of the chassis 1 is fixedly connected to a slide rail that mates with the sliding groove 202, the rotating shaft 7 passes through the inside of the slide rail, the plug block 206 is provided with a slot 207 that mates with the connecting block 208 on the side near the connecting block 208, and two connecting rods 203 are fixedly connected to the outer surface of the connecting frame 201, and a pull rod 204 is fixedly connected to the end of the two connecting rods 203 away from the connecting frame 201.

[0036] Furthermore, by pulling the lever 204, the connecting rod 203 is driven to pull the connecting frame 201 out of the housing 1. The housing 1 is equipped with a slide rail, and the outer surface of the connecting rod 203 is provided with a groove 202, which finally allows the connecting rod 203 to be pulled out. After pulling it out, the damaged heating element 205 can be replaced. The new heating element 205 is inserted into the slot 207 on the outer surface of the plug block 206, thereby completing the replacement of the heating element 205. After the replacement is completed, the connecting frame 201 is inserted back into the housing 1. A fan is provided on the upper surface of the baffle, and ventilation holes are provided on the back of the housing 1. The connection relationship, working principle, and workflow between the heating element 205 and other components are existing technologies and are common knowledge that should be possessed by those skilled in the art, and will not be elaborated on here.

[0037] Working principle: When using a hot air brush to remove solder balls from the PCB board, a new brush 5 is inserted into the connector 402 via the connecting plate 401. The connecting plate 401 is limited by the limiting strip 404. As the connecting plate 401 slides on the surface of the limiting strip 404, the rounded corner at the bottom of the second pin 409 causes the second pin 409 to lift upwards. The second pin 409 drives the connecting plate 407 to compress the spring 408, thereby causing the second pin 409 to retract into the connector 402, allowing the connecting plate 401 to pass through. After the connecting plate 401 slides to the position where the round hole on the outer surface of the connecting plate 401 mates with the bottom end of the second pin 409, the connecting plate 407 is pressed by the spring 408, thereby driving the second pin 409 to insert into the insertion hole on the upper surface of the connecting plate 401, thus fixing the connecting plate 401. Then, the enclosure 405 is rotated to the outside, thereby fixing the outside of the connecting plate 401. After the enclosure 405 is rotated to the outside, the first pin 403 is inserted into the insertion hole on the outer surface of the connecting seat 402, and then the second pin 409 is inserted into the insertion hole on the outer surface of the connecting seat 402. The magnet 406 on the outer surface of the pin 403 cooperates with the connecting seat 402 to fix the guardrail 405, thereby completing the replacement and installation of the brush 5. Then, pull the lever 204, which, through the action of the connecting rod 203, causes the connecting frame 201 to slide out through the inside of the housing 1, allowing the damaged heating element 205 to be removed. Then, the new heating element 205 is inserted into the slot 207 on the outer surface of the plug block 206, thus completing the replacement of the heating element 205. After the replacement is completed, the connecting frame 201 is inserted back into the housing 1, and the guardrail 405 is fixed in place. A fan mounted on the upper surface of the board blows heated air, heated by the heating element 205, to the top brush 5. The fan then drives the rotating shaft 7 to rotate via the geared motor 3, which in turn drives the connecting seat 402 to rotate. When the connecting seat 402 rotates, it drives the limiting strip 404 to rotate, which in turn drives the connecting plate 401 to rotate. This causes the brush 5 to rotate along with the connecting plate 401. The PCB board with solder balls to be removed is held and placed on the rotating brush 5. The solder balls, melted by the hot air, are then removed by the brush 5, thus completing the solder ball removal process on the PCB board.

[0038] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A hot air brush for removing solder balls from a PCB board, comprising a chassis (1), characterized in that: A brush (5) is provided on the top of the chassis (1), a fixing component (4) is provided at the bottom of the brush (5), a rotating shaft (7) is inserted inside the chassis (1), and two heating components (2) are inserted inside the chassis (1). The fixing component (4) includes a connecting seat (402) movably connected to the top of the chassis (1). The lower surface of the connecting seat (402) is fixedly connected to the top end of the rotating shaft (7). A connecting plate (401) is slidably connected to the upper surface of the connecting seat (402). The upper surface of the connecting plate (401) is fixedly connected to the bottom of the brush (5). A plurality of second pins (409) are inserted inside the connecting seat (402). A connecting plate (407) is fixedly connected to the outer surface of the second pins (409). A spring (408) is fixedly connected to the upper surface of the connecting plate (407). The top end of the spring (408) is fixedly connected to the inner wall of the connecting seat (402). The upper surface of the connecting plate (401) is provided with a socket that cooperates with the second pins (409). The heating assembly (2) includes a connecting frame (201) that is slidably connected inside the chassis (1). A plurality of plug-in blocks (206) are fixedly connected to the inner wall of the connecting frame (201). A connecting block (208) is movably connected to the outer surface of the plug-in block (206). A heating element (205) is fixedly connected to the side of the connecting block (208) away from the plug-in block (206).

2. The hot air brush for removing solder balls from a PCB board according to claim 1, characterized in that: A geared motor (3) is fixedly connected to the bottom of the inner cavity of the chassis (1). The output end of the geared motor (3) is fixedly connected to the bottom end of the rotating shaft (7). A partition (6) is fixedly connected to the inner wall of the chassis (1). A fan is provided on the upper surface of the partition (6). A ventilation hole is provided on the back of the chassis (1).

3. A hot air brush for removing solder balls from a PCB board according to claim 2, characterized in that: The upper surface of the connecting seat (402) is slidably connected to a barrier (405), the radius of the barrier (405) is the same as the radius of the connecting plate (401), and the two ends of the barrier (405) are provided with notches to facilitate the insertion of the connecting plate (401). The bottom end of the second pin (409) is provided with a rounded corner.

4. A hot air brush for removing solder balls from a PCB board according to claim 3, characterized in that: Two first pins (403) are interposed on the outer surface of the connecting seat (402). A magnet (406) is fixedly connected to the outer surface of the first pin (403). A round hole that mates with the first pin (403) is opened on the outer surface of the enclosure (405). Three limiting strips (404) are provided on the upper surface of the connecting seat (402). The connecting plate (401) slides on the outer surface of the limiting strips (404).

5. A hot air brush for removing solder balls from a PCB board according to claim 4, characterized in that: The outer surface of the chassis (1) is provided with a rectangular through hole for the sliding of the heating component (2), the outer surface of the connecting frame (201) is provided with a sliding groove (202), the inner wall of the chassis (1) is fixedly connected with a slide rail that cooperates with the sliding groove (202), and the rotating shaft (7) passes through the inside of the slide rail.

6. A hot air brush for removing solder balls from a PCB board according to claim 5, characterized in that: The plug block (206) has a slot (207) that mates with the connecting block (208) on the side near the connecting block (208). Two connecting rods (203) are fixedly connected to the outer surface of the connecting frame (201), and a pull rod (204) is fixedly connected to the end of the two connecting rods (203) away from the connecting frame (201).

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