PCB jig resistant to high-temperature deformation

Abstract

The utility model relates to the field of jigs, and discloses a PCB jig resistant to high-temperature deformation, which comprises two jig vertical plates, the inner sides of the upper ends of the two jig vertical plates are respectively provided with a connecting sliding chute, and a transverse sliding rail is connected between the two connecting sliding chutes in a sliding manner. Through the arrangement of an anti-deformation pressing mechanism, when a PCB is placed on the jig, two pressing screws move downwards by rotating the two pressing screws till piston buckling columns at the lower ends of the two pressing screws are buckled to the front and back positions of the middle of the PCB in a pressing mode, and buffer springs are arranged between buckling discs and the piston buckling columns, so that the PCB can be clamped in the front and back positions of the middle of the PCB. The pressing mechanism is used for buffering and evenly distributing pressure applied to the PCB, even pressure is applied to the PCB through the pressing mechanism, PCB deformation caused by high temperature can be effectively resisted, and in the wave soldering process, the pressing mechanism keeps even pressure on the PCB and prevents the PCB from deforming at the high temperature.

Description

Technical Field

[0001] The utility model relates to the field of jigs, and in particular to a PCB jig that is resistant to high-temperature deformation. Background Art

[0002] A PCB (Printed Circuit Board) fixture is a specialized tool used in the electronics manufacturing industry to fix, support, and position PCB boards for various processing operations.

[0003] Wave soldering is a batch soldering process commonly used in the electronics manufacturing industry, in which PCBs are soldered using a wave of molten solder. During this process, the PCBs may deform due to the high temperature. This deformation not only affects the quality of the solder joints but may also cause damage to the circuit board itself. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a PCB fixture that is resistant to high-temperature deformation, which solves the problem that PCB boards may be deformed due to high temperatures during the wave soldering process.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a PCB jig that resists high-temperature deformation, including a jig vertical plate, the number of which is set to two, the inner sides of the upper ends of the two jig vertical plates are each provided with a connecting slide groove, the middle of the two connecting slide grooves is slidably connected with a transverse slide rail, the front and rear sides of the transverse slide rail are slidably connected with a transverse adjustment block, and the outer sides of the two transverse adjustment blocks are each provided with an anti-deformation pressing mechanism, the anti-deformation pressing mechanism includes a pressing arm, an upper positioning plate, a lower positioning plate, a pressing screw and a buckling plate, the upper end of the pressing arm is fixedly connected to the outer side of the transverse adjustment block, and the upper and lower ends of the side of the lower moving arm away from the transverse adjustment block are respectively fixedly connected to the upper positioning plate and the lower positioning plate, a pressing screw is provided through the middle of the upper positioning plate and the lower positioning plate, and the pressing screws are threadedly connected to the upper positioning plate and the lower positioning plate, and the lower end of the pressing screw is fixedly connected to the buckling plate.

[0006] Preferably, a piston pressing column is provided below the pressing plate, and a buffer spring is provided between the piston pressing column and the pressing plate.

[0007] Preferably, the front and rear sides below the two jig vertical plates are fixedly connected with jig horizontal plates, and the outer sides of the two jig horizontal plates are provided with anti-deformation support mechanisms, and the anti-deformation support mechanisms include a bidirectional screw, a fixed plate, a drive motor, a counter-moving slider, a sliding bearing arm and an anti-slip strip, and the bidirectional screw is provided on the outer side of the jig horizontal plate.

[0008] Preferably, the left and right ends of the bidirectional screw are rotatably connected to the inner sides of two fixed plates, and the two fixed plates are respectively fixedly connected to the left and right sides of the jig horizontal plate.

[0009] Preferably, a driving motor is provided on the outside of the fixing plate, and the output end of the driving motor is connected to the bidirectional lead screw transmission.

[0010] Preferably, both left and right sides of the bidirectional lead screw are threadedly connected with opposing sliding blocks, and the upper surfaces of the two opposing sliding blocks are fixedly connected with sliding bearing arms.

[0011] Preferably, an anti-slip strip is provided on the upper surface of the sliding bearing arm.

[0012] Preferably, the anti-slip strip is made of rubber.

[0013] Preferably, a ventilator is provided between the two fixture uprights.

[0014] Preferably, the left and right sides of the bidirectional lead screw are provided with thread structures in opposite directions.

[0015] Beneficial effects

[0016] The utility model provides a PCB fixture that resists high-temperature deformation. Compared with the existing technology, it has the following advantages:

[0017] 1. In the present invention, an anti-deformation pressing mechanism is provided. When a PCB is placed on a jig, the two pressing screws are respectively rotated to move downward until the piston pressing columns at their lower ends are pressed against the front and rear positions of the middle of the PCB. A buffer spring is provided between the pressing plate and the piston pressing column to buffer and evenly distribute the pressure applied to the PCB. The pressing mechanism applies uniform pressure to the PCB, effectively resisting deformation of the PCB caused by high temperature. During the wave soldering process, the pressing mechanism maintains uniform pressure on the PCB to prevent deformation at high temperatures.

[0018] 2. In the present invention, an anti-deformation support mechanism is provided to prevent the PCB from being deformed during wave soldering. Before the PCB board is placed on the jig, two bidirectional screws are driven to rotate simultaneously by two driving motors. After the two bidirectional screws rotate, the opposing sliding blocks on both sides of the two bidirectional screws can be moved together with the sliding bearing arms toward the inner side, so that the two sliding bearing arms are close to the two side areas of the lower surface of the PCB board. Thereafter, the PCB board is placed on the upper surface of the two sliding bearing arms and then pressed tightly with the anti-deformation pressing mechanism. The sliding bearing arms provide stable support for the PCB board, effectively preventing the PCB board from being deformed during the wave soldering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a PCB fixture that resists high-temperature deformation proposed by the present invention;

[0020] Figure 2 This is a schematic structural diagram of a PCB fixture that resists high-temperature deformation proposed by the present invention, viewed from an oblique upper angle;

[0021] Figure 3 This is a schematic diagram of the structure of the anti-deformation pressing mechanism in the internal structure diagram of a PCB fixture that resists high-temperature deformation proposed by the present invention;

[0022] Figure 4 This utility model proposes a PCB fixture that resists high temperature deformation Figure 1 A magnified view of middle A;

[0023] Figure 5 This utility model proposes a PCB fixture that resists high temperature deformation Figure 1 Magnified view of B.

[0024] Legend:

[0025] 1. Jig vertical plate; 2. Jig horizontal plate; 3. Anti-deformation pressing mechanism; 301. Pressing arm; 302. Upper positioning plate; 303. Lower positioning plate; 304. Pressing screw; 305. Buckling plate; 306. Buffer spring; 307. Piston buckling column; 4. Anti-deformation supporting mechanism; 401. Bidirectional screw; 402. Fixed plate; 403. Driving motor; 404. Opposite sliding block; 405. Sliding bearing arm; 406. Anti-slip strip; 5. Fan guide; 6. Connecting slide; 7. Horizontal slide rail; 8. Horizontal adjustment block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 5 , the utility model provides two technical solutions, specifically including the following embodiments:

[0028] Example 1:

[0029] A PCB fixture that resists high-temperature deformation includes a fixture vertical plate 1. The number of fixture vertical plates 1 is set to two. A connecting slide 6 is opened on the inner side of the upper end of the two fixture vertical plates 1. A horizontal slide rail 7 is slidably connected between the two connecting slide rails 6. The horizontal slide rails 7 are slidably connected to the horizontal adjustment blocks 8 on both the front and rear sides. An anti-deformation pressing mechanism 3 is provided on the outer side of the two horizontal adjustment blocks 8. The anti-deformation pressing mechanism 3 includes a pressing arm 301, an upper positioning plate 302, a lower positioning plate 303, a pressing screw 304 and a pressing plate 305. The upper end of the pressing arm 301 is fixedly connected to the horizontal adjustment block On the outside of 8, the upper and lower ends of the side of the downward moving arm away from the lateral adjustment block 8 are fixedly connected with the upper positioning plate 302 and the lower positioning plate 303 respectively, and a downward pressing screw 304 is arranged between the upper positioning plate 302 and the lower positioning plate 303, and the downward pressing screw 304 is threadedly connected to the upper positioning plate 302 and the lower positioning plate 303, and the lower end of the downward pressing screw 304 is fixedly connected with a buckling plate 305, and a piston buckling column 307 is arranged below the buckling plate 305, and a buffer spring 306 is arranged between the piston buckling column 307 and the buckling plate 305, and the spring constant of the buffer spring 306 is: 5 N / mm, preload force: 10 N, and maximum working force: 50 N.

[0030] During operation, when the PCB board is placed on the jig, the two pressing screws 304 are rotated respectively to move downward until the piston pressing columns 307 at the lower ends of the two are pressed at the front and rear positions in the middle of the PCB board, and a buffer spring 306 is provided between the pressing plate 305 and the piston pressing column 307 to buffer and evenly distribute the pressure applied to the PCB board. By applying uniform pressure to the PCB board through the pressing mechanism, the deformation of the PCB board caused by high temperature can be effectively resisted. During the wave soldering process, the pressing mechanism maintains uniform pressure on the PCB board to prevent it from deformation at high temperature.

[0031] Example 2:

[0032] On the basis of Example 1, the two jig vertical plates 1 are fixedly connected to the jig horizontal plate 2 on both the front and rear sides below, and the two jig horizontal plates 2 are provided with an anti-deformation support mechanism 4 on the outside. The anti-deformation support mechanism 4 includes a bidirectional screw 401, a fixed plate 402, a drive motor 403, a sliding slider 404, a sliding bearing arm 405 and an anti-slip strip 406. The bidirectional screw 401 is arranged on the outside of the jig horizontal plate 2, and the left and right ends of the bidirectional screw 401 are rotatably connected to the inner sides of the two fixed plates 402. The two fixed plates 402 are respectively The two sides of the two-way screw 401 are threadedly connected to the left and right sides of the jig horizontal plate 2, and the two upper surfaces of the two-way sliders 404 are fixedly connected to the sliding bearing arms 405. The upper surface of the sliding bearing arms 405 is provided with anti-slip strips 406, and the anti-slip strips 406 are made of rubber. A guide fan 5 is provided in the middle of each plate 1. The exhaust direction of the right guide fan 5 is toward the inner side of the right jig vertical plate 1, and the exhaust direction of the left guide fan 5 is toward the outer side of the left jig vertical plate 1, so that a one-way wind can be formed, thereby reducing the temperature of the PCB board during the welding process and further reducing thermal deformation. The left and right sides of the bidirectional screw 401 are provided with thread structures in opposite directions. To prevent the PCB from deforming during wave soldering, before the PCB board is placed on the jig, the two bidirectional screws 401 are driven to rotate simultaneously by two driving motors 403. After the two bidirectional screws 401 rotate, the opposing sliders 404 on both sides of the two bidirectional screws 401 can be moved together with the sliding bearing arms 405 toward the inner side, so that the two sliding bearing arms 405 are close to the two side areas of the lower surface of the PCB board. Then the PCB board is placed on the upper surface of the two sliding bearing arms 405, and then pressed tightly with the anti-deformation pressing mechanism 3. The sliding bearing arms 405 provide stable support for the PCB board, effectively preventing the PCB board from deforming during wave soldering.

[0033] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application should be included in the scope of protection of the present application.

Claims

1. A PCB fixture resistant to high temperature deformation, comprising a fixture stand (1), characterized in that: The number of the jig stand (1) is set to two, and the inner sides of the upper ends of the two jig stand (1) are provided with connecting grooves (6), the middle of the two connecting grooves (6) are slidably connected with a transverse slide rail (7), the front and rear sides of the transverse slide rail (7) are slidably connected with a transverse adjustment block (8), and the outer sides of the two transverse adjustment blocks (8) are provided with an anti-deformation pressing mechanism (3), and the anti-deformation pressing mechanism (3) includes a pressing arm (301), an upper positioning plate (302), a lower positioning plate (303), a pressing screw (304) and a buckling plate (306). 05), the upper end of the downward pressing support arm (301) is fixedly connected to the outside of the transverse adjustment block (8), and the upper and lower ends of the downward moving support arm away from the transverse adjustment block (8) are respectively fixedly connected to the upper positioning plate (302) and the lower positioning plate (303), and a downward pressing screw (304) is provided through the middle of the upper positioning plate (302) and the lower positioning plate (303), and the downward pressing screw (304) is threadedly connected to the upper positioning plate (302) and the lower positioning plate (303), and the lower end of the downward pressing screw (304) is fixedly connected to the buckling plate (305).

2. The high-temperature deformation-resistant PCB fixture according to claim 1, characterized in that: A piston pressing column (307) is provided below the pressing plate (305), and a buffer spring (306) is provided between the piston pressing column (307) and the pressing plate (305).

3. The high-temperature deformation-resistant PCB fixture according to claim 1, characterized in that: A jig transverse plate (2) is fixedly connected to the front and rear sides below the two jig vertical plates (1), and an anti-deformation support mechanism (4) is provided on the outside of the two jig transverse plates (2). The anti-deformation support mechanism (4) includes a bidirectional lead screw (401), a fixed plate (402), a drive motor (403), a counter-moving slider (404), a sliding bearing arm (405) and an anti-slip strip (406). The bidirectional lead screw (401) is provided on the outside of the jig transverse plate (2).

4. The high-temperature deformation-resistant PCB fixture according to claim 3, characterized in that: The left and right ends of the bidirectional lead screw (401) are rotatably connected to the inner sides of two fixed plates (402), and the two fixed plates (402) are respectively fixedly connected to the left and right sides of the fixture horizontal plate (2).

5. The high-temperature deformation-resistant PCB fixture according to claim 4, characterized in that: A driving motor (403) is provided outside the fixing plate (402), and an output end of the driving motor (403) is transmission-connected to the bidirectional lead screw (401).

6. The high-temperature deformation-resistant PCB fixture according to claim 5, characterized in that: The left and right sides of the bidirectional lead screw (401) are both threadedly connected to opposing sliding blocks (404), and the upper surfaces of the two opposing sliding blocks (404) are both fixedly connected to sliding bearing arms (405).

7. The high-temperature deformation-resistant PCB fixture according to claim 6, characterized in that: An anti-slip strip (406) is provided on the upper surface of the sliding bearing arm (405).

8. The high-temperature deformation-resistant PCB fixture according to claim 7, characterized in that: The anti-slip strip (406) is made of rubber.

9. The high-temperature deformation-resistant PCB fixture according to claim 1, characterized in that: A ventilator (5) is provided in the middle of the two fixture upright plates (1).

10. The high-temperature deformation-resistant PCB fixture according to claim 3, characterized in that: The left and right sides of the bidirectional lead screw (401) are provided with thread structures in opposite directions.

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