Reflow soldering jig for PCB (Printed Circuit Board)

Abstract

The utility model relates to a PCB (Printed Circuit Board) reflow soldering jig, and discloses a PCB reflow soldering jig, which is characterized in that the jig is installed and positioned by inserting a positioning bolt column and a positioning hole seat in a hole position, and the upper jig and the lower jig are installed and limited by embedding and clamping a connecting limiting block and a limiting groove seat. The connection limiting block is matched with the first spring through the shaft column for installation connection, the limiting connection between the connection limiting block and the limiting groove base can be completed through simple rotary clamping after embedding butt joint, and stable elastic supporting force can be provided for an installed element through elastic abutting of the first spring. The stable supporting of the element can be guaranteed, meanwhile, the too loose and too tight stress condition can be avoided, the jig carrier plate is of a split type installation structure, the jig carrier plate is fixed and limited through embedding and positioning of the notch and fastening of a bolt column at the end, disassembly, assembly and replacement are convenient, jig carrier plates of different specifications can be replaced according to the model of a material plate in the working process, and the working efficiency is improved. And the device can meet the welding, positioning and mounting requirements of different types of material plates.

Description

Technical Field

[0001] This utility model relates to a PCB board reflow soldering fixture, specifically a PCB board reflow soldering fixture. Background Technology

[0002] With the miniaturization, diversification, and rapid development of the electronics market, and to meet the needs of different customers and application scenarios, reflow soldering is a common technology in the electronics manufacturing industry. Reflow soldering involves heating air or nitrogen to a sufficiently high temperature and blowing it onto a circuit board with components already mounted, causing the solder on both sides of the components to melt and bond to the circuit board. The advantages of this process are that the temperature is easy to control, oxidation can be avoided during the soldering process, and manufacturing costs are easier to control. During the soldering process, specialized fixtures are needed to position and support the components and PCB substrate.

[0003] During operation, the fixture relies on the clamping support of the upper and lower parts to support and position the components and PCB substrate. For the docking and installation of the upper and lower parts of the fixture, the existing fixtures mostly adopt the bolt fastening docking and installation structure, which is not only very inconvenient to disassemble and assemble, but also has high requirements for the tightness of the bolts during installation. Too loose or too tight will easily cause deviation in the positioning accuracy of the components, making it very inconvenient to use. Therefore, a reflow soldering fixture for PCB boards is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a reflow soldering fixture for PCB boards to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reflow soldering fixture for a PCB board, comprising a carrier plate mechanism and a top plate mechanism for PCB board soldering positioning. The carrier plate mechanism includes a base frame, a fixture carrier plate, and a pressure edge limiting block. The fixture carrier plate is detachably installed in the middle of the base frame through a slot fitting. A board positioning groove is provided in the middle of the fixture carrier plate. The pressure edge limiting block is rotatably installed on the outer side of the board positioning groove.

[0006] The top plate mechanism includes a fixture top plate, a positioning bolt, a connecting limit block, a first spring, a mounting stud, and a second spring. The fixture top plate is installed on the upper part of the fixture carrier plate by the insertion and positioning of the positioning bolt and the snap-fit ​​of the connecting limit block. The first spring is installed on the upper mounting side of the connecting limit block, and the second spring is installed on the lower part of the fixture top plate by the mounting stud.

[0007] Preferably, the base frame is provided with a mounting groove in the middle, the fixture carrier plate is fitted into the inner side of the mounting groove, and a fastening bolt is provided on the rear end side of the fixture carrier plate. The end of the fastening bolt passes through the rear end side of the fixture carrier plate and is threadedly connected to the screw hole on the side of the base frame.

[0008] Preferably, the plate positioning groove is located in the middle of the fixture carrier plate, and the pressing edge limiting block is rotatably mounted on the upper part of the fixture carrier plate by means of a rotating shaft. The pressing edge limiting blocks are evenly distributed on the outer side of the groove opening of the plate positioning groove.

[0009] Preferably, the aforementioned positioning bolts are symmetrically fixedly installed at the lower four corners of the top plate of the fixture, and a positioning hole seat is fixedly installed on the upper part of the fixture carrier plate. After installation, the lower end of the positioning bolt is aligned and inserted into the insertion hole in the middle of the positioning hole seat.

[0010] Preferably, the connecting limit blocks are arranged in pairs, and a mounting shaft is fixedly installed between the two sets of connecting limit blocks. The mounting shaft is movably inserted into the shaft hole in the middle of the top side of the fixture.

[0011] Preferably, the first spring is fitted onto the upper part of the mounting column, and the first spring is pushed against the lower part of the upper connecting limiting block. The upper part of the fixture carrier plate is fixedly installed with a limiting groove seat. After installation, the lower connecting limiting block is engaged and snapped into the limiting groove in the middle of the limiting groove seat.

[0012] Preferably, multiple mounting studs are provided, and the mounting studs are threadedly connected to the screw holes on the upper part of the fixture top plate. The lower part of the mounting studs penetrates through the fixture top plate, and the second spring is fixedly installed on the lower part of the mounting studs.

[0013] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects:

[0014] This fixture employs a docking and limiting structure for insertion and positioning with end block snap-fit. The fixture is positioned by inserting the positioning bolt into the positioning hole seat, and the installation limitation between the upper and lower fixtures is achieved through the interlocking and snap-fit ​​between the connecting limiting block and the limiting slot seat. The connecting limiting block is installed and connected via a shaft and a first spring. After interlocking, a simple rotation snap-fit ​​completes the limiting connection with the limiting slot seat. The structure is simple and easy to assemble and disassemble. The elastic push of the first spring provides stable elastic support for the installed components, ensuring stable support while avoiding excessive looseness or tightness, thus improving component positioning accuracy. Furthermore, the fixture carrier plate adopts a split installation structure. The fixture carrier plate is fixed and limited by the slot interlocking and positioning with the end bolt. Disassembly and replacement are convenient. During operation, different specifications of fixture carrier plates can be installed according to the material plate model, allowing the device to meet the welding positioning and installation requirements of different types of material plates. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the overall installation upper three-dimensional structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the lower side of the overall installation of this utility model;

[0018] Figure 3 This is a schematic diagram of the working and installation structure of the carrier plate mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the working disassembly structure of the carrier plate mechanism of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the upper side of the top plate mechanism of this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of the lower side of the top plate mechanism of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Base frame; 2. Fixture carrier plate; 3. Edge clamping limit block; 4. Fixture top plate; 5. Positioning bolt; 6. Connecting limit block; 7. First spring; 8. Mounting stud; 9. Second spring; 10. Plate positioning groove; 11. Positioning hole seat; 12. Limiting groove seat; 13. Fastening bolt. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0025] Example

[0026] Please see Figure 1-6 This utility model provides a technical solution: a reflow soldering fixture for a PCB board, including a carrier plate mechanism and a top plate mechanism for PCB board soldering positioning. The carrier plate mechanism is used for mounting and positioning the PCB board. The carrier plate mechanism includes a base frame 1, a fixture carrier plate 2, and a pressure edge limiting block 3. The fixture carrier plate 2 is detachably mounted to the middle of the base frame 1 through a slot. Specifically, see attached figure. Figure 4 As shown, to facilitate the connection and installation of the fixture carrier plate 2, an installation groove is provided in the middle of the base frame 1. The fixture carrier plate 2 is fitted into the inner side of the installation groove. In order to lock and limit the installation of the fixture carrier plate 2, a fastening bolt 13 is provided on the rear end side of the fixture carrier plate 2. The end of the fastening bolt 13 passes through the rear end side of the fixture carrier plate 2 and is threadedly connected to the screw hole on the side of the base frame 1. The fixture carrier plate 2 adopts a split installation structure. The fixture carrier plate 2 is fixed and limited by the slot fitting and positioning and the end bolt fastening. It is easy to disassemble and replace. During operation, different specifications of fixture carrier plates 2 can be replaced according to the material plate model, so that the device can meet the welding positioning and installation requirements of different types of material plates.

[0027] The fixture carrier board 2 serves as the mounting structure for the PCB board, as shown in the attached figure. Figure 3 As shown, in order to facilitate the positioning and installation of the PCB board, a board positioning groove 10 is provided in the middle of the fixture carrier plate 2. The board positioning groove 10 is opened in the middle of the fixture carrier plate 2. The pressing edge limiting block 3 is rotatably installed on the outer side of the board positioning groove 10 for limiting support of the PCB board after installation. Specifically, the pressing edge limiting block 3 is rotatably installed on the upper part of the fixture carrier plate 2 through the support of the rotating shaft. The pressing edge limiting blocks 3 are evenly distributed on the outer side of the groove opening of the board positioning groove 10. After installation, the pressing edge limiting block 3 is rotated to use the pressing edge limiting block 3 end head to press and support the edge of the PCB board to complete its installation limitation.

[0028] The top plate mechanism is used for downward support and limiting of the components after installation. The top plate mechanism includes a fixture top plate 4, positioning bolts 5, connecting limiting blocks 6, a first spring 7, mounting studs 8, and a second spring 9. The fixture top plate 4 is installed on the upper part of the fixture carrier plate 2 through the insertion and positioning of the positioning bolts 5 and the snap-fit ​​limiting of the connecting limiting blocks 6. Specifically, see attached... Figure 2As shown, the positioning pins 5 are symmetrically fixed at the four lower corners of the fixture top plate 4. Positioning hole seats 11 are fixedly installed on the upper part of the fixture carrier plate 2. After installation, the lower end of the positioning pin 5 is aligned and inserted into the insertion hole in the middle of the positioning hole seat 11 to achieve the installation and positioning of the fixture top plate 4. The connecting limit blocks 6 are arranged in pairs, and an installation shaft is fixedly installed between the two sets of connecting limit blocks 6. The installation shaft is movably inserted into the shaft hole in the middle of the end side of the fixture top plate 4. The first spring 7 is fitted onto the upper part of the installation shaft, and the first spring 7 is pushed against the lower part of the upper connecting limit block 6. A limit groove seat 12 is fixedly installed on the upper part of the fixture carrier plate 2. Limit groove openings are provided on the upper part and side of the limit groove seat 12. During installation, the connecting limit block 6 is fitted into the limit groove opening from the upper opening. The lower rear connecting limit block 6 is installed by rotating and engaging with the limiting slot in the middle of the limiting slot seat 12. It adopts a docking limiting structure with the end block locking when using the insertion hole positioning. The fixture is installed and positioned by the insertion of the positioning bolt 5 and the positioning hole seat 11. The installation limit between the upper and lower fixtures is achieved by the engagement between the connecting limit block 6 and the limiting slot seat 12. The connecting limit block 6 is installed and connected by the shaft column and the first spring 7. After the engagement, the limiting connection with the limiting slot seat 12 can be completed by simple rotation locking. The structure is simple and easy to disassemble and assemble. The elastic push of the first spring 7 can provide a stable elastic support force for the installed component, ensuring stable support of the component and avoiding the occurrence of excessive looseness or tightness of the force, which is conducive to improving the positioning accuracy of the component.

[0029] The second spring 9 is mounted on the lower part of the fixture top plate 4 by means of mounting studs 8, as shown in the attached figure. Figure 6 As shown, multiple mounting studs 8 are provided. The mounting studs 8 are threadedly connected to the screw holes on the upper part of the fixture top plate 4. The lower part of the mounting studs 8 penetrates through the fixture top plate 4. The second spring 9 is fixedly installed on the lower part of the mounting studs 8. After installation, the second spring 9 provides elastic pressure support to the upper part of the component, which can ensure accurate positioning of the component during welding.

[0030] Working principle or structural principle: During use, select the corresponding fixture carrier plate 2 and fixture top plate 4 according to the PCB substrate specifications. Then, connect and install the fixture carrier plate 2 to the base frame 1 through slot fitting. Next, install the fastening bolts 13 into the screw holes on the end side of the fixture carrier plate 2. The fastening bolts 13 complete the installation limit between the base frame 1 and the fixture carrier plate 2. Pre-install the components on the upper part of the PCB substrate. Then, align and fit the entire PCB substrate into the inner side of the board positioning groove 10 on the upper part of the fixture carrier plate 2 to complete the installation and positioning of the PCB substrate. Then, use the rotating and pushing edge limiting block 3 to press and limit the edge of the PCB substrate to complete the positioning and installation of the PCB substrate. After completion, check and adjust the position of the components on the upper part of the PCB substrate. Finally, remove the fixture. Lift the top plate 4, align and insert the positioning pin 5 with the positioning hole seat 11 on the upper part of the fixture carrier plate 2, then slowly lower the fixture top plate 4 so that the second spring 9 contacts and supports the upper part of the component. Then press down the fixture top plate 4 from the middle and rotate the connecting limit blocks 6 on both sides in sequence so that they fit into the groove in the middle of the limit slot seat 12, thereby realizing the installation limit of the fixture top plate 4 after installation. After installation, the push support of the first spring 7 can provide a stable elastic support force for the installed component, ensuring stable support of the component while avoiding the occurrence of excessive looseness or tightness. Then, install the entire fixture on the upper part of the soldering station and complete the soldering process of the component by reflow soldering. Afterwards, simply rotate the connecting limit block 6 to disassemble it from the groove of the limit slot seat 12, and the fixture top plate 4 can be removed and the work completed.

[0031] In summary, this fixture employs a docking and limiting structure for insertion and positioning with end block snap-fit. The fixture is installed and positioned using the insertion of the positioning bolt 5 and the positioning hole seat 11. The installation limitation between the upper and lower fixtures is achieved through the interlocking and snap-fit ​​between the connecting limiting block 6 and the limiting groove seat 12. The connecting limiting block 6 is installed and connected via a shaft and a first spring 7. After interlocking, a simple rotation snap-fit ​​completes the limiting connection with the limiting groove seat 12. The structure is simple and easy to assemble and disassemble. Furthermore, the elastic push of the first spring 7 provides stable elastic support for the installed components, ensuring stable support while avoiding excessive looseness or tightness, thus improving component positioning accuracy. The fixture carrier plate 2 adopts a split installation structure. The fixture carrier plate 2 is fixed and limited by the slot interlocking and positioning with the end bolts, making disassembly and replacement convenient. During operation, different specifications of fixture carrier plates 2 can be installed according to the material plate model, allowing the device to meet the welding positioning and installation requirements of different types of material plates.

[0032] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A reflow soldering fixture for a PCB board, comprising a carrier mechanism and a top plate mechanism for positioning the PCB board during soldering, characterized in that: The carrier plate mechanism includes a base frame (1), a jig carrier plate (2), and a pressing edge limiting block (3). The jig carrier plate (2) is detachably installed in the middle of the base frame (1) through a slot fitting. A plate positioning groove (10) is provided in the middle of the jig carrier plate (2). The pressing edge limiting block (3) is rotatably installed on the outer side of the plate positioning groove (10). The top plate mechanism includes a fixture top plate (4), a positioning bolt (5), a connecting limit block (6), a first spring (7), a mounting stud (8), and a second spring (9). The fixture top plate (4) is installed on the upper part of the fixture carrier plate (2) by the insertion and positioning of the positioning bolt (5) and the snap-fit ​​of the connecting limit block (6). The first spring (7) is installed on the upper mounting side of the connecting limit block (6) by pushing against it. The second spring (9) is installed on the lower part of the fixture top plate (4) by the mounting stud (8).

2. The reflow soldering fixture for a PCB board according to claim 1, characterized in that: The base frame (1) has a mounting groove in the middle. The fixture carrier plate (2) is fitted into the inner side of the mounting groove. The rear end of the fixture carrier plate (2) is provided with a fastening bolt (13). The end of the fastening bolt (13) passes through the rear end of the fixture carrier plate (2) and is threadedly connected to the screw hole on the side of the base frame (1).

3. The reflow soldering fixture for a PCB board according to claim 2, characterized in that: The plate positioning groove (10) is located in the middle of the fixture carrier plate (2). The pressing edge limiting block (3) is rotatably mounted on the upper part of the fixture carrier plate (2) by means of a rotating shaft. The pressing edge limiting block (3) is evenly distributed on the outer side of the groove opening of the plate positioning groove (10).

4. The reflow soldering fixture for a PCB board according to claim 1, characterized in that: The positioning bolts (5) are symmetrically fixed at the four lower corners of the top plate (4) of the fixture. The upper part of the fixture carrier plate (2) is fixedly installed with a positioning hole seat (11). After installation, the lower end of the positioning bolts (5) is aligned and inserted into the middle hole of the positioning hole seat (11).

5. A reflow soldering fixture for a PCB board according to claim 4, characterized in that: The connecting limit blocks (6) are set in pairs, and a mounting shaft is fixedly installed between the two sets of connecting limit blocks (6). The mounting shaft is movably inserted into the shaft hole in the middle of the end side of the top plate (4) of the fixture.

6. A reflow soldering fixture for a PCB board according to claim 5, characterized in that: The first spring (7) is fitted onto the upper part of the mounting column. The first spring (7) is pushed against the lower part of the upper connecting limit block (6). The upper part of the fixture carrier plate (2) is fixedly installed with a limit slot seat (12). After installation, the lower connecting limit block (6) and the limit slot in the middle of the limit slot seat (12) are fitted and snapped together.

7. A reflow soldering fixture for a PCB board according to claim 6, characterized in that: Multiple mounting studs (8) are provided. The mounting studs (8) are threadedly connected to the screw holes on the upper part of the fixture top plate (4). The lower part of the mounting studs (8) penetrates the fixture top plate (4). The second spring (9) is fixedly installed on the lower part of the mounting studs (8).

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