A fixture for PCBA board calibration

Abstract

This utility model relates to the field of PCBA board technology, specifically a PCBA board calibration fixture, including a base. A placement platform is fixedly connected to the top of the base. A calibration and testing device is provided on the rear side of the top of the base. Movable strips are movably connected to both sides of the top of the base. The bottoms of the two movable strips are connected by a movable structure. A first clamping plate is fixedly connected to the top of the movable strips. A mounting plate is fixedly connected to each of the two first clamping plates opposite to each other. A first rotating rod is movably connected to the front and rear sides of the first clamping plate through a rotating shaft. This solution allows a specially shaped PCBA board to be placed on the placement platform first. Then, the two movable strips move towards the placement platform via the movable structure. When they reach the designated position, the first clamping plate clamps both sides of the PCBA board, and simultaneously, an auxiliary clamping mechanism clamps the special inclined surfaces on both sides of the PCBA board, thus fixing the specially shaped PCBA board.

Description

Technical Field

[0001] This utility model relates to the field of PCBA board technology, specifically a fixture for PCBA board calibration. Background Technology

[0002] PCBA, or Printed Circuit Board Assembly, is a complete functional module formed by soldering electronic components onto a printed circuit board (PCB). It plays a core role in electronic devices.

[0003] Conventional PCBA boards are mostly cuboids or cubes. There are mature products available for corresponding calibration fixtures for these workpieces. However, for some workpieces with high precision requirements and special shapes, such as those that are trapezoidal or rhomboid in shape, traditional PCBA board fixtures are difficult to fix them properly, which affects the measurement accuracy of the PCBA board during subsequent calibration measurements. Therefore, a fixture that can fix PCBA boards of different shapes was developed. Utility Model Content

[0004] The purpose of this invention is to provide a PCBA board calibration fixture to solve the problem mentioned in the background art that traditional calibration fixtures are difficult to fix PCBA boards with special shapes.

[0005] To achieve the above objectives, this utility model provides the following technical solution, including a base, a placement platform fixedly connected to the top of the base, a calibration and testing device provided on the rear side of the top of the base, movable strips movably connected to both sides of the top of the base, the bottoms of the two movable strips being connected by a movable structure, a first clamping plate fixedly connected to the top of the movable strips, mounting plates fixedly connected to the two first clamping plates opposite to each other, a first rotating rod movably connected to the front and rear sides of the first clamping plates via a rotating shaft, the upper and lower sides of the first rotating rod being movably connected to the mounting plate and the movable strip respectively, and an auxiliary clamping mechanism mounted on the surface of the first rotating rod.

[0006] Preferably, the auxiliary clamping mechanism includes a first gear and a second clamping plate. The inner cavities of the first gear and the second clamping plate are fixedly connected to one of the first rotating rods. The bottom of the second clamping plate contacts the movable strip. The front side of the first gear meshes with a second gear. The inner cavity of the second gear is fixedly connected to a second rotating rod. The upper and lower sides of the second rotating rod are movably connected to the first clamping plate and the mounting plate, respectively. The second rotating rod is connected to one of the first rotating rods through a transmission structure. The front side of the mounting plate is fixedly connected to a first motor. The output shaft of the first motor is fixedly connected to one of the first rotating rods.

[0007] Preferably, the movable structure includes a second motor, the output end of which is fixedly connected to a bidirectional threaded rod. The left side of the bidirectional threaded rod is movably connected to the base, and a movable plate is placed on the surface of the bidirectional threaded rod. The top of the movable plate is fixedly connected to the movable bar.

[0008] Preferably, limit rods are fixedly connected to both the front and rear sides of the bottom of the base, and two limit blocks are movably connected to the surface of the limit rods. The limit blocks are fixedly connected to the movable plate.

[0009] Preferably, the transmission structure includes a driving wheel and a driven wheel, which are movably connected by a belt, and the inner cavities of the driving wheel and the driven wheel are fixedly connected to the first rotating rod and the second rotating rod, respectively.

[0010] Preferably, the top of the second rotating rod and the top of the mounting plate are both provided with annular through holes, the two annular through holes are connected to each other, and a positioning rod is placed in the inner cavity of the annular through holes.

[0011] Preferably, the four corners of the top of the base are provided with grooves, and the front and rear sides of the bottom of the movable strip are movably connected to rollers through a pivot, and the bottom of the rollers fits tightly in the grooves.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This solution allows you to first place a specially shaped PCBA board on a placement platform. Then, two movable bars move towards the placement platform via a movable structure. When they reach the designated position, the first clamping plate clamps both sides of the PCBA board, while the auxiliary clamping mechanism clamps the special inclined surfaces on both sides of the PCBA board, thus fixing the specially shaped PCBA board. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional view from the right side of this utility model;

[0016] Figure 3 This is a bottom view of a partial structure of this utility model;

[0017] Figure 4 This is a partial structural side view of the present invention;

[0018] Figure 5 This is a magnified view of a portion of the structure at point A of this utility model.

[0019] In the diagram: 1. Base; 2. Placement platform; 3. Calibration and testing device; 4. Movable bar; 5. First clamping plate; 6. Mounting plate; 7. First rotating rod; 8. Auxiliary clamping mechanism; 801. First gear; 802. Second clamping plate; 803. Second gear; 804. Second rotating rod; 805. First motor; 806. Driving wheel; 807. Driven wheel; 808. Positioning rod; 9. Second motor; 10. Bidirectional threaded rod; 11. Movable plate; 12. Limiting rod; 13. Limiting block; 14. Roller. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Example 1:

[0023] Please see Figure 1-5 This utility model provides a technical solution: a PCBA board calibration fixture, including a base 1, a placement platform 2 fixedly connected to the top of the base 1, a calibration and detection device 3 provided on the rear side of the top of the base 1, movable strips 4 movably connected to both sides of the top of the base 1, the bottoms of the two movable strips 4 are connected by a movable structure, a first clamping plate 5 fixedly connected to the top of the movable strip 4, and a mounting plate 6 fixedly connected to each of the two first clamping plates 5 in opposite directions, a first rotating rod 7 movably connected to the front and rear sides of the first clamping plate 5 via a rotating shaft, the upper and lower sides of the first rotating rod 7 being movably connected to the mounting plate 6 and the movable strip 4 respectively, and an auxiliary clamping mechanism 8 being installed on the surface of the first rotating rod 7.

[0024] Analysis of the above content: During use, the inspector first places the specially shaped PCBA board on the placement platform 2. Then, the two movable bars 4 move towards the placement platform 2 through the movable structure. When they move to the designated position, the first clamping plate 5 clamps the two sides of the PCBA board. Then, the inspector activates the auxiliary clamping mechanism 8 to clamp the special inclined surfaces on both sides of the PCBA board, thus fixing the specially shaped PCBA board. After fixing, the inspector activates the calibration and testing device 3 to calibrate and test the PCBA board. The calibration and testing device 3 is an existing structure that uses a cylinder to drive the calibration plate to press and test the PCBA board.

[0025] Example 2:

[0026] Please see Figure 1-5 This utility model provides a technical solution based on Embodiment 1: The auxiliary clamping mechanism 8 includes a first gear 801 and a second clamping plate 802. The inner cavities of the first gear 801 and the second clamping plate 802 are fixedly connected to one of the first rotating rods 7. The bottom of the second clamping plate 802 contacts the movable strip 4. The front side of the first gear 801 is meshed with a second gear 803. The inner cavity of the second gear 803 is fixedly connected to a second rotating rod 804. The upper and lower sides of the second rotating rod 804 are movably connected to the first clamping plate 5 and the mounting plate 6, respectively. The second rotating rod 804 is connected to one of the first rotating rods 7 through a transmission structure. The front side of the mounting plate 6 is fixedly connected to a first motor 805. The output shaft of the first motor 805 is fixedly connected to one of the first rotating rods 7.

[0027] Analysis of the above: After the first clamping plate 5 fixes both sides of the trapezoidal PCBA board, the inspector starts the first motor 805. The output shaft of the first motor 805 drives the first rotating rod 7 to connect. The first rotating rod 7 drives the second rotating rod 804 to rotate in the same direction through the transmission structure. The second rotating rod 804 drives the second gear 803 to rotate. The second gear 803 meshes with the first gear 801 to rotate in the opposite direction. The first gear 801 drives the other first rotating rod 7 to rotate. Through the above operation, the two first rotating rods 7 rotate in opposite directions, indirectly driving the second clamping plate 802. When the second clamping plate 802 is tightly attached to the inclined surface of the trapezoidal PCBA board, it can fix the PCBA board by cooperating with the first clamping plate 5, thereby achieving the purpose of fixing the PCBA board with a special shape.

[0028] Example 3:

[0029] Please see Figure 1-5The present invention provides a technical solution based on Embodiment 1: the movable structure includes a second motor 9, the output end of the second motor 9 is fixedly connected to a bidirectional threaded rod 10, the left side of the bidirectional threaded rod 10 is movably connected to the base 1, a movable plate 11 is placed on the surface of the bidirectional threaded rod 10, and the top of the movable plate 11 is fixedly connected to the movable bar 4.

[0030] Analysis of the above content: The output shaft of the second motor 9 drives the bidirectional threaded rod 10 to rotate. While rotating, the bidirectional threaded rod 10 drives the two movable plates 11 to move towards the center of the bottom of the base 1, which indirectly drives the movable bar 4 to move. When it moves to the designated position, the first clamping plate 5 and the auxiliary clamping mechanism 8 at the top of the movable bar 4 can fix the PCBA board.

[0031] Example 4:

[0032] Please see Figure 1-5 Based on Embodiment 1, this utility model provides a technical solution: the front and rear sides of the bottom of the base 1 are fixedly connected to limit rods 12, and two limit blocks 13 are movably connected to the surface of the limit rods 12. The limit blocks 13 are fixedly connected to the movable plate 11.

[0033] Analysis of the above content: By setting the limit rod 12 and the limit block 13 in cooperation, the movable plate 11 moves and drives the limit block 13 to move on the surface of the limit rod 12, so that the movable plate 11 is limited to the movement trajectory of the limit rod 12 and prevents it from being misaligned.

[0034] Example 5:

[0035] Please see Figure 1-5 The present invention provides a technical solution based on Embodiment 1: the transmission structure includes a driving wheel 806 and a driven wheel 807, which are movably connected by a belt, and the inner cavities of the driving wheel 806 and the driven wheel 807 are fixedly connected to the first rotating rod 7 and the second rotating rod 804, respectively.

[0036] Analysis of the above content: By setting up a driving wheel 806 and a driven wheel 807, when the first rotating rod 7 rotates through the output shaft of the first motor 805, the first rotating rod 7 drives the driving wheel 806 to rotate. The driving wheel 806 drives another driven wheel 807 to rotate through a belt. The driven wheel 807 drives the second rotating rod 804 to rotate in the same direction, thereby completing the transmission.

[0037] Example 6:

[0038] Please see Figure 1-5Based on Embodiment 1, this utility model provides a technical solution: the top of the second rotating rod 804 and the top of the mounting plate 6 are both provided with annular through holes, the two annular through holes are connected to each other, and the inner cavity of the annular through holes is used to place a positioning rod 808.

[0039] Analysis of the above content: After the first clamping plate 5 and the auxiliary clamping mechanism 8 clamp the PCBA board, one of the first rotating rods 7 is fixed by the self-locking structure inside the first motor 805. At the same time, the inspector puts multiple positioning rods 808 into the annular through hole on the second rotating rod 804 and the mounting plate 6 to fix the second rotating rod 804 and prevent it from rotating on its own, thus fixing it.

[0040] Example 7:

[0041] Please see Figure 1-5 Based on Embodiment 1, this utility model provides a technical solution: the four corners of the top of the base 1 are provided with grooves, and the front and rear sides of the bottom of the movable strip 4 are movably connected to rollers 14 through rotating shafts, and the bottom of the rollers 14 are tightly fitted with the grooves.

[0042] Analysis of the above content: By setting the roller 14 to move in the groove, the movable strip 4 can be limited, and the friction at the connection between the movable strip 4 and the base 1 can be reduced to prevent wear during long-term use. Note: The roller 14 makes the movable strip 4 slightly lift up, so that the bottom and the base 1 are no longer tightly attached.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for PCBA board calibration, characterized in that, include: A base (1) is provided with a placement platform (2) fixedly connected to the top of the base (1). A calibration and testing device (3) is provided on the rear side of the top of the base (1). Movable strips (4) are movably connected to both sides of the top of the base (1). The bottoms of the two movable strips (4) are connected by a movable structure. A first clamping plate (5) is fixedly connected to the top of the movable strip (4). A mounting plate (6) is fixedly connected to both sides of the two first clamping plates (5). A first rotating rod (7) is movably connected to the front and rear sides of the first clamping plate (5) through a rotating shaft. The upper and lower sides of the first rotating rod (7) are movably connected to the mounting plate (6) and the movable strip (4) respectively. An auxiliary clamping mechanism (8) is installed on the surface of the first rotating rod (7).

2. The PCBA board calibration fixture according to claim 1, characterized in that: The auxiliary clamping mechanism (8) includes a first gear (801) and a second clamping plate (802). The inner cavities of the first gear (801) and the second clamping plate (802) are fixedly connected to one of the first rotating rods (7). The bottom of the second clamping plate (802) contacts the movable bar (4). The front side of the first gear (801) is meshed with a second gear (803). The inner cavity of the second gear (803) is fixedly connected to a second rotating rod (804). The upper and lower sides of the second rotating rod (804) are movably connected to the first clamping plate (5) and the mounting plate (6) respectively. The second rotating rod (804) is connected to one of the first rotating rods (7) through a transmission structure. The front side of the mounting plate (6) is fixedly connected to a first motor (805). The output shaft of the first motor (805) is fixedly connected to one of the first rotating rods (7).

3. The PCBA board calibration fixture according to claim 1, characterized in that: The movable structure includes a second motor (9), the output end of which is fixedly connected to a bidirectional threaded rod (10). The left side of the bidirectional threaded rod (10) is movably connected to the base (1). A movable plate (11) is placed on the surface of the bidirectional threaded rod (10), and the top of the movable plate (11) is fixedly connected to the movable bar (4).

4. A PCBA board calibration fixture according to claim 3, characterized in that: Limiting rods (12) are fixedly connected to the front and rear sides of the bottom of the base (1). Two limiting blocks (13) are movably connected to the surface of the limiting rods (12). The limiting blocks (13) are fixedly connected to the movable plate (11).

5. A PCBA board calibration fixture according to claim 2, characterized in that: The transmission structure includes a driving wheel (806) and a driven wheel (807), which are movably connected by a belt. The inner cavities of the driving wheel (806) and the driven wheel (807) are fixedly connected to the first rotating rod (7) and the second rotating rod (804), respectively.

6. A PCBA board calibration fixture according to claim 2, characterized in that: The top of the second rotating rod (804) and the top of the mounting plate (6) are both provided with annular through holes, the two annular through holes are connected to each other, and the inner cavity of the annular through holes is used to place a positioning insert (808).

7. A PCBA board calibration fixture according to claim 1, characterized in that: The four corners of the top of the base (1) are provided with grooves, and the front and rear sides of the bottom of the movable strip (4) are movably connected to rollers (14) through a rotating shaft. The bottom of the rollers (14) fits tightly with the grooves.

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