SMT (surface mount technology) furnace jig applied to PCB (printed circuit board)

Abstract

The utility model relates to the technical field of SMT (Surface Mount Technology) furnace passing, in particular to an SMT furnace passing jig applied to a PCB (Printed Circuit Board), which comprises a square jig frame, and a strip-shaped first sliding device and a strip-shaped second sliding device are arranged in the jig frame; the two ends of the first sliding device and the two ends of the second sliding device are connected with the corresponding edges of the jig frame in a sliding mode respectively, and the two ends of the first sliding device and the two ends of the second sliding device can be locked to the corresponding edges of the jig frame through the first locking device and the second locking device respectively. The size of the containing groove formed by the first sliding device and the second sliding device can be adjusted according to the size of a PCB needing to be fixed so that the PCB can be placed, the first sliding device and the second sliding device can be locked and fixed after the size is adjusted, and it is guaranteed that the PCB placed in the containing groove is stably clamped; and the position can be adjusted through the arrangement of the first placing piece and the second placing piece, the PCB can be placed and clamped more evenly and stably, the flexibility is high, adjustment is convenient, and the utilization rate is high.

Description

Technical Field

[0001] This utility model relates to the field of SMT reflow technology, specifically to an SMT reflow fixture applied to PCB boards. Background Technology

[0002] SMT reflow fixtures are specialized circuit board (mainly PCB) fixtures used for SMT processing. They are suitable for various PCBs with SMD components on the solder side of the through-hole components. Their main purpose is to prevent PCB deformation during reflow or wave soldering, protect SMD components from damage, and improve production efficiency and product quality. SMT reflow technology plays a core role in modern electronics manufacturing. SMT production lines use precise placement equipment to accurately and quickly place electronic components onto circuit boards, greatly improving production efficiency and product quality. It is not only suitable for the production of high-density, small-volume electronic products but can also adapt to electronic components of different specifications and models, meeting complex and diverse production needs, and belongs to advanced manufacturing technology.

[0003] PCBs come in different sizes due to different usage scenarios or functions. If the SMT reflow fixture can only fix PCBs of the same size, the utilization rate will be low and it will not be flexible enough. Therefore, this utility model provides a fixture that can adapt to fixing PCBs of different sizes. Utility Model Content

[0004] This invention provides an SMT reflow fixture for PCB boards to achieve flexible fixation of PCB boards of different sizes.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: An SMT reflow fixture for PCB boards is provided, the innovation of which lies in: including a square fixture frame, wherein the fixture frame is provided with a first sliding device and a second sliding device, both of which are elongated strips, perpendicular to each other within the fixture frame; the two ends of the first and second sliding devices are slidably connected to the corresponding edges of the fixture frame, and the two ends of the first and second sliding devices are respectively locked to the corresponding edges of the fixture frame by a first locking device and a second locking device; a square groove formed by the first and second sliding devices and the fixture frame is arbitrarily selected as a placement groove; first placement components are evenly provided on both the first sliding device portion and the fixture frame portion forming the placement groove, and second placement components are evenly provided on the second sliding device portion forming the placement groove; the first placement components are slidably connected to the corresponding first sliding device or fixture frame, and can be fixed to the corresponding first sliding device or fixture frame by a third locking device; the second placement components are slidably connected to the corresponding second sliding device, and can be fixed to the corresponding second sliding device by a fourth locking device.

[0006] Furthermore, the fixture frame is provided with first sliding grooves on both sides of the first sliding device. The bottom of the first sliding groove is also provided with a connecting groove on the side near the inside of the fixture frame, which communicates with the inside of the fixture frame. The two ends of the first sliding device are provided with connecting plates corresponding to the connecting grooves. The connecting plates are placed in the first sliding groove through the connecting grooves and can slide in the first sliding groove through the connecting grooves.

[0007] Furthermore, the first locking device is a first bolt, the connecting plate is provided with bolt holes, the diameter of the first bolt nut is greater than the width of the first slide groove, and the first bolt is threaded downward in the first slide groove and connected to the connecting plate until the nut of the first bolt is pressed downward against the upper surface of the fixture frame.

[0008] Furthermore, the fixture frame is provided with connecting seats on both sides of the second sliding device, and the connecting seats are provided with a connecting sliding groove and a vertical fixing groove. The two ends of the second sliding device pass through the connecting seats through the sliding groove and can slide within the connecting seats. The second sliding device is located above the first sliding device.

[0009] Furthermore, the second locking device is a second bolt, and the two ends of the second sliding device are provided with bolt holes corresponding to the positions of the vertical fixing groove and the second bolt. The diameter of the nut of the second bolt is larger than the width of the vertical fixing groove. The second bolt is threaded downward in the vertical fixing groove and connected to the second sliding device until the nut of the second bolt is pressed downward against the upper surface of the connecting seat.

[0010] Furthermore, the first placement member is Z-shaped, and the connected parts of the first placement member are perpendicular to each other. The upper horizontal part of the first placement member rests on the corresponding fixture frame or the first sliding device and can slide on the upper surface of the fixture frame or the first sliding device. The remaining parts are located in the placement groove, and the lower horizontal parts are all on the same horizontal plane.

[0011] Furthermore, the third locking device is a third bolt, and the first sliding device is provided with a downward placement groove. The bottom of the placement groove, the vertical fixing groove, and the first groove are all uniformly provided with third threaded holes corresponding to the third bolt. The diameter of the nut of the third bolt is greater than the width of the placement groove, the vertical fixing groove, and the first groove. The third bolt is threaded downward to the bottom of the corresponding placement groove, the vertical fixing groove, or the first groove until the nut of the third bolt is pressed downward against the upper surface of the fixture frame, the first sliding device, or the connecting seat.

[0012] Furthermore, the second placement member is Z-shaped, and the connecting parts of the second placement member are perpendicular to each other. The upper horizontal part of the second placement member is a connecting sleeve, which is slidably fitted onto the second sliding device. The lower horizontal part of the second placement member and the lower horizontal part of the first placement member are on the same horizontal plane.

[0013] Furthermore, the fourth locking device is a fourth bolt, and both the second sliding device and the connecting sleeve are provided with a fourth threaded hole corresponding to the fourth bolt. The fourth bolt fixes the connecting sleeve to the second sliding device through a threaded connection.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This utility model provides an SMT reflow fixture for PCB boards. By slidably connecting the first sliding device and the second sliding device to the fixture frame, the size of the placement slot formed by the first and second sliding devices can be adjusted according to the size of the PCB board to be fixed. After the size is adjusted, the first and second sliding devices can be locked and fixed by the first and second locking devices respectively, ensuring stable clamping of the PCB board placed in the placement slot. The setting of the first and second placement components can be adjusted in position, allowing for more balanced and stable placement and clamping of the PCB board. It is highly flexible, easy to adjust, and has a high utilization rate. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of an SMT reflow fixture for PCB boards according to the present invention.

[0018] Figure 2 For the present utility model Figure 1 Enlarged view of point A in the image.

[0019] Figure 3 This is a cross-sectional view showing the connection between the first sliding device and the fixture frame in this utility model.

[0020] Figure 4 This is a top view of the placement groove or vertical fixing groove or the first groove of the present invention having a third threaded hole.

[0021] Figure 5This is a cross-sectional view showing the connection between the first placement component and the first sliding device of this utility model.

[0022] Figure 6 This is a cross-sectional view of the first placement component and the edge connection of the fixture frame without a connecting seat in this utility model.

[0023] Figure 7 This is a cross-sectional view of the first placement component and the jig frame with connecting seat of this utility model.

[0024] Figure 8 For the present utility model Figure 1 A schematic diagram of the structure in which a PCB board is placed.

[0025] Among them, 1- jig frame, 2- first sliding device, 21- first slide groove, 22- connecting groove, 23- connecting plate, 3- second sliding device, 31- connecting seat, 32- sliding through groove, 33- vertical fixing groove, 4- first locking device, 5- second locking device, 6- placement groove, 7- first placement piece, 8- second placement piece, 9- third locking device, 91- third threaded hole, 10- fourth locking device, 101- fourth threaded hole, 11- PCB board, 12- placement slide groove, 13- connecting sleeve. Detailed Implementation

[0026] 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.

[0027] Example 1

[0028] This embodiment provides an SMT reflow fixture for PCB boards, including a square fixture frame 1, the specific structure of which is as follows: Figure 1As shown, the fixture frame 1 is provided with a first sliding device 2 and a second sliding device 3, both of which are elongated strips. The first sliding device 2 and the second sliding device 3 are perpendicular to each other within the fixture frame 1. The two ends of the first sliding device 2 and the second sliding device 3 are slidably connected to the corresponding edges of the fixture frame 1. The two ends of the first sliding device 2 and the two ends of the second sliding device 3 can be locked to the corresponding edges of the fixture frame 1 by the first locking device 4 and the second locking device 5, respectively. A square groove formed by the first sliding device 2, the second sliding device 3, and the fixture frame 1 can be selected as a placement groove 6. The first placement member 7 is evenly provided on both the first sliding device 2 and the fixture frame 1 forming the placement groove 6. The second placement member 8 is evenly provided on the second sliding device 3 forming the placement groove 6. The first placement member 7 is slidably connected to the corresponding first sliding device 2 or the fixture frame 1, and can be fixed to the corresponding first sliding device 2 or the fixture frame 1 by the third locking device 9. The second placement member 8 is slidably connected to the corresponding second sliding device 3, and can be fixed to the corresponding second sliding device 3 by the fourth locking device 10.

[0029] In this embodiment, by sliding the first sliding device 2 and the first sliding device 3 onto the fixture frame 1, the size of the placement groove 6 formed by the first sliding device 2 and the second sliding device 3 can be adjusted according to the size of the PCB board 11 to be fixed, so that the PCB board 11 can be placed. After the size is adjusted, the first sliding device 2 and the first sliding device 3 can be locked and fixed by the first locking device 4 and the second locking device 5 respectively, so as to ensure the stable clamping of the PCB board 11 placed in the placement groove 6. The first placement component 7 and the second placement component 8 can be adjusted in position, so as to place and clamp the PCB board 11 in a more balanced and stable manner, which is highly flexible, easy to adjust, and has a high utilization rate.

[0030] Example 2

[0031] In this embodiment, the jig frame 1 is connected to the first sliding device 2 and has a first sliding groove 21 on both sides. The bottom of the first sliding groove 21 is also provided with a connecting groove 22 on the side near the inside of the jig frame 1, which communicates with the inside of the jig frame 1. The first sliding device 2 has a connecting plate 23 at both ends corresponding to the connecting groove 22. The connecting plate 23 is placed in the first sliding groove 21 through the connecting groove 22 and can slide in the first sliding groove 21 through the connecting groove 22.

[0032] In this embodiment, the first locking device 4 is a first bolt, and the connecting plate 23 is provided with bolt holes, such as... Figure 2 and 3 As shown, the diameter of the nut of the first bolt is greater than the width of the first groove 21. The first bolt is threaded downward in the first groove 21 and connected to the connecting plate 23 until the nut of the first bolt is pressed downward against the upper surface of the fixture frame 1.

[0033] The rest is the same as in Example 1.

[0034] This embodiment specifically describes the connection structure between the first sliding device 2 and the fixture frame 1. In use, the position of the first sliding device 2 on the fixture frame 1 is adjusted according to the size of the PCB board 11 to be placed, that is, the length of the corresponding side of the placement slot 6 is adjusted to accommodate the PCB board 11. Then, it is locked and fixed by the first locking device 4 and the connecting plate 23. It is flexible to use and stable to fix.

[0035] Example 3

[0036] In this embodiment, the jig frame 1 is connected to the second sliding device 3, and the two sides are provided with connecting seats 31. The connecting seats 31 are provided with a sliding through groove 32 and a vertical fixing groove 33. The two ends of the second sliding device 3 pass through the connecting seats 31 through the sliding through groove 32 and can slide in the connecting seats 31. The second sliding device 3 is located above the first sliding device 2.

[0037] In this embodiment, the second locking device 5 is a second bolt. The two ends of the second sliding device 5 are provided with bolt holes corresponding to the positions of the vertical fixing groove 33 and the second bolt. The diameter of the nut of the second bolt is larger than the width of the vertical fixing groove 33. The second bolt is threaded downward in the vertical fixing groove 33 and connected to the second sliding device 3 until the nut of the second bolt is pressed downward against the upper surface of the connecting seat 31.

[0038] The rest is the same as in Example 2.

[0039] This embodiment specifically describes the connection structure between the second sliding device 3 and the fixture frame 1. In use, the position of the second sliding device 3 on the fixture frame 1 is adjusted according to the size of the PCB board 11 to be placed, that is, the length of the corresponding side of the placement slot 6 is adjusted to accommodate the PCB board 11. Then, it is locked and fixed by the second locking device 5 and the second sliding device 3. It is flexible to use and stable to fix.

[0040] Example 4

[0041] In this embodiment, the first placement member 7 is Z-shaped, and the connected parts of the first placement member 7 are perpendicular to each other. The upper horizontal part of the first placement member 7 is placed on the corresponding fixture frame 1 or the first sliding device 2, and can slide on the upper surface of the fixture frame 1 or the first sliding device 2. The remaining parts are all located in the placement groove 6, and the lower horizontal parts are all on the same horizontal plane.

[0042] The rest is the same as in Example 3.

[0043] The position of the first placement component 7 can be adjusted according to the specific size of the PCB board 11, so that the first placement component 7 is evenly set. When placing, the PCB board 11 is placed on the plane formed by the horizontal lower part of the first placement component 7, ensuring that the PCB board 11 is placed in a balanced and stable manner.

[0044] Example 5

[0045] In this embodiment, the third locking device 9 is a third bolt. The first sliding device 2 has a downward-facing placement groove 12. The bottom of the placement groove 12, the vertical fixing groove 33, and the first groove 21 are all uniformly provided with third threaded holes 91 corresponding to the third bolt. Figure 4 As shown, the diameter of the nut of the third bolt is larger than the width of the placement groove 12, the vertical fixing groove 33, and the first groove 21. The third bolt is threaded downwards and connected to the bottom of the corresponding placement groove 12, vertical fixing groove 33, or first groove 21 until the nut of the third bolt is pressed downwards against the upper surface of the fixture frame 1, the first sliding device 2, or the connecting seat 31. Figure 5-7 As shown.

[0046] The rest is the same as in Example 4.

[0047] After adjusting the position of each first placement component 7 according to the PCB board 11, the third locking device 9 locks each first placement component 7 onto the corresponding fixture frame 1, first sliding device 2, or connecting seat 31.

[0048] Example 6

[0049] In this embodiment, the second placement member 8 is Z-shaped, and the connecting parts of the second placement member 8 are perpendicular to each other. The upper horizontal part of the second placement member 8 is a connecting sleeve 13, which is slidably fitted onto the second sliding device 3. The lower horizontal part of the second placement member 8 and the lower horizontal part of the first placement member 7 are on the same horizontal plane. Figure 8 As shown, when using it, the PCB board 11 is placed in the placement slot 6.

[0050] The rest is the same as in Example 5.

[0051] The second placement component 8 can be slidably adjusted on the second sliding device 3 according to the specific size of the PCB board 11, such as... Figure 1 As shown, the two second placement pieces 8 are evenly arranged. When placing the PCB board 11, it is placed on the plane formed by the second placement piece 8 and the first placement piece 7 at their lower horizontal positions, ensuring that the PCB board 11 is placed in a balanced and stable manner.

[0052] Example 7

[0053] In this embodiment, the fourth locking device 10 is a fourth bolt. The second sliding device 3 and the connecting sleeve are both provided with a fourth threaded hole 101 corresponding to the fourth bolt. The fourth bolt fixes the connecting sleeve on the second sliding device 3 through a threaded connection.

[0054] After adjusting the positions of each first placement component 7 and second placement component 8 according to the PCB board 11, the first placement component 7 and second placement component 8 are locked and fixed by the third locking device 9 and the fourth locking device 10 respectively.

[0055] The rest is the same as in Example 6.

[0056] In use, the PCB board 11 can be placed in the placement groove 6 first, and then the positions of the first sliding device 2, the second sliding device 3, the first placement member 7, and the second placement member 8 can be adjusted according to its size, making it easier to clamp and fix the PCB board 11. Preferably, the placement groove 6 of this invention is provided with two first placement members 7 or two second placement members 8 on each of its four sides (the second sliding device 3 is provided with two second placement members 8, and the other three sides are provided with two first placement members 7 on each side).

[0057] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully recorded in the technical requirements.

Claims

1. An SMT reflow fixture for PCB boards, characterized in that: The fixture includes a square jig frame, within which are elongated first and second sliding devices, perpendicular to each other. The two ends of each sliding device are slidably connected to corresponding edges of the jig frame, and can be locked to the corresponding edges using first and second locking devices. A square groove formed by the first and second sliding devices and the jig frame can be selected as a placement groove. First placement members are evenly distributed on both the first sliding device portion and the jig frame portion forming the placement groove, and second placement members are evenly distributed on the second sliding device portion forming the placement groove. The first placement members are slidably connected to the corresponding first sliding device or jig frame and can be fixed to the corresponding first sliding device or jig frame using a third locking device. The second placement members are slidably connected to the corresponding second sliding device and can be fixed to the corresponding second sliding device using a fourth locking device.

2. The SMT reflow fixture for PCB boards according to claim 1, characterized in that: The fixture frame is connected to the first sliding device and has a first sliding groove on both sides. The bottom of the first sliding groove is also provided with a connecting groove on the side near the inside of the fixture frame, which communicates with the inside of the fixture frame. The first sliding device has connecting plates at both ends corresponding to the connecting grooves. The connecting plates are placed in the first sliding groove through the connecting grooves and can slide in the first sliding groove through the connecting grooves.

3. The SMT reflow fixture for PCB boards according to claim 2, characterized in that: The first locking device is a first bolt. The connecting plate is provided with bolt holes. The diameter of the nut of the first bolt is greater than the width of the first groove. The first bolt is threaded downward in the first groove and connected to the connecting plate until the nut of the first bolt is pressed downward against the upper surface of the fixture frame.

4. The SMT reflow fixture for PCB boards according to claim 2, characterized in that: The fixture frame is connected to the second sliding device with connecting seats on both sides facing upwards. The connecting seats are provided with a sliding through groove and a vertical fixing groove. The two ends of the second sliding device pass through the connecting seats through the sliding through groove and can slide within the connecting seats. The second sliding device is located above the first sliding device.

5. The SMT reflow fixture for PCB boards according to claim 4, characterized in that: The second locking device is a second bolt. The two ends of the second sliding device are provided with bolt holes corresponding to the positions of the vertical fixing groove and the second bolt. The diameter of the nut of the second bolt is larger than the width of the vertical fixing groove. The second bolt is threaded downward in the vertical fixing groove and connected to the second sliding device until the nut of the second bolt is pressed downward against the upper surface of the connecting seat.

6. The SMT reflow fixture for PCB boards according to claim 5, characterized in that: The first placement component is Z-shaped, and the connected parts of the first placement component are perpendicular to each other. The upper horizontal part of the first placement component rests on the corresponding fixture frame or the first sliding device and can slide on the upper surface of the fixture frame or the first sliding device. The remaining parts are located in the placement groove, and the lower horizontal parts are all on the same horizontal plane.

7. The SMT reflow fixture for PCB boards according to claim 6, characterized in that: The third locking device is a third bolt. The first sliding device is provided with a downward placement groove. The bottom of the placement groove, the vertical fixing groove, and the first groove are all uniformly provided with third threaded holes corresponding to the third bolt. The diameter of the nut of the third bolt is greater than the width of the placement groove, the vertical fixing groove, and the first groove. The third bolt is threaded downward to the bottom of the corresponding placement groove, the vertical fixing groove, or the first groove until the nut of the third bolt is pressed downward against the upper surface of the fixture frame, the first sliding device, or the connecting seat.

8. The SMT reflow fixture for PCB boards according to claim 5, characterized in that: The second placement member is Z-shaped, and the connecting parts of the second placement member are perpendicular to each other. The upper horizontal part of the second placement member is a connecting sleeve, which is slidably fitted onto the second sliding device. The lower horizontal part of the second placement member and the lower horizontal part of the first placement member are on the same horizontal plane.

9. The SMT reflow fixture for PCB boards according to claim 8, characterized in that: The fourth locking device is a fourth bolt. The second sliding device and the connecting sleeve are both provided with a fourth threaded hole corresponding to the fourth bolt. The fourth bolt fixes the connecting sleeve to the second sliding device through a threaded connection.

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