Patch jig

Abstract

The utility model provides a chip mounting jig. The chip mounting jig comprises a positioning plate, a fixed column, a permanent magnet, an electromagnet, a movable cavity and a protruding block, the electromagnet is arranged at the bottom of the positioning plate; the positioning plate is provided with a plurality of movable cavities communicated with the space for placing the electromagnets; through holes are formed in the two ends of the movable cavity respectively, and the protruding block is arranged at one end of the fixing column. The end, provided with the protruding block, of the fixing column is arranged in the movable cavity, and the other end of the fixing column penetrates through a hole close to the surface of the positioning plate and extends out by a preset distance. The permanent magnet is arranged at the end, provided with the protruding block, of the fixing column. The problem of inaccurate positioning is effectively solved, a plurality of fixing columns are arranged, and the PCB is fixed by the surrounding fixing columns under the action of magnetic force, so that the positioning accuracy is improved, and the surface mounting quality in the subsequent process is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board processing, in particular to a chip mounting fixture. Background Art

[0002] When processing a circuit board, the PCB board needs to be connected by soldering. Solder paste is set at a preset position on the PCB board, and the PCB board is placed on a mounter for soldering.

[0003] When an SMT mounter performs chip mounting on a circuit board, a chip mounting fixture is required to limit and position the circuit board to prevent damage caused by shaking during chip mounting.

[0004] The existing technology generally performs front and rear positioning and clamping on circuit boards of different sizes. The front and rear positioning is inaccurate, and the circuit board will shift during actual use. Summary of the Utility Model

[0005] In view of the above problems, the present utility model is proposed to provide a chip mounting fixture that overcomes or at least partially solves the above problems.

[0006] To solve the above problems, the present utility model discloses a chip mounting fixture, including: a positioning plate, fixed columns, permanent magnets, electromagnets, movable cavities, and protruding blocks; the electromagnet is arranged at the bottom of the positioning plate; the positioning plate is provided with a plurality of movable cavities communicating with the space for placing the electromagnet; through holes are respectively arranged at both ends of the movable cavity, and one end of the fixed column is provided with the protruding block; the end of the fixed column provided with the protruding block is arranged in the movable cavity, and the other end passes through a hole near the surface of the positioning plate and extends a preset distance; a permanent magnet is arranged at the end of the fixed column provided with the protruding block.

[0007] Further, the movable cavities are arranged in a row and column array on the positioning plate; through holes are respectively arranged at both ends of the movable cavity.

[0008] Further, the diameter of the hole is 2.5 mm.

[0009] Further, the chip mounting fixture further includes a control center; the control center is electrically connected to the electromagnet.

[0010] Further, the chip mounting fixture further includes a display screen module; the display screen module is electrically connected to the control center.

[0011] Further, connection holes for installation are arranged at the side end of the positioning plate.

[0012] The present utility model has the following advantages:

[0013] By arranging a number of fixed posts on the positioning plate, due to the magnetic force, when placing the PCB board, the fixed posts in contact with the bottom of the PCB board move downward under the action of gravity, and the other fixed posts around the PCB remain unchanged and provide a contact force to the PCB, enabling the PCB to be fixed, improving the positioning accuracy, and also improving the chip mounting quality in the subsequent processes. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of an embodiment of a chip mounting fixture of the present invention;

[0015] Figure 2 is a top view of an embodiment of a chip mounting fixture of the present invention.

[0016] In the figure: 1, positioning plate; 2, fixed post; 3, permanent magnet; 4, electromagnet; 5, movable cavity; 6, protruding block. Detailed Embodiment

[0017] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Embodiment 1

[0019] Refer to Figure 1 , which shows a schematic structural diagram of a chip mounting fixture of the present invention. Specifically, it may include: a positioning plate 1, a fixed post 2, a permanent magnet 3, an electromagnet 4, a movable cavity 5 and a protruding block 6; the electromagnet 4 is arranged at the bottom of the positioning plate 1; the positioning plate 1 is provided with a plurality of movable cavities 5 communicating with the space where the electromagnet 4 is placed; through holes are respectively arranged at both ends of the movable cavity 5, and a protruding block 6 is arranged at one end of the fixed post 2; one end of the fixed post 2 where the protruding block 6 is arranged is arranged in the movable cavity 5, and the other end passes through a hole near the surface of the positioning plate 1 and extends a preset distance; a permanent magnet 3 is arranged at one end of the fixed post 2 where the protruding block 6 is arranged.

[0020] It should be noted that the working principle of the present utility model is realized through the interaction between the permanent magnet and the electromagnet. In the initial state, the electromagnet 4 is not energized. Under the action of gravity and the protrusion block 6, the fixed column 2 is just stuck at a position close to the electromagnet 4. When the electromagnet 4 is energized, its magnetic pole is the same as the magnetic pole of the permanent magnet 3 provided on the fixed column 2. If the end of the permanent magnet 3 close to the electromagnet 4 is the N pole, then the electromagnet 4 is controlled to emit a magnetic field of the N pole. Similarly, if the end of the permanent magnet 3 close to the electromagnet 4 is the S pole, then the electromagnet 4 is controlled to emit a magnetic field of the S pole. Thus, the fixed column 2 is subjected to a repulsive force, which is greater than the gravity of the fixed column 2, causing it to move upward along the movable cavity 5 and finally be stuck in the hole near the surface of the positioning plate 1. The remaining part of the fixed column 2 without the protrusion block 6 passes through the hole near the surface of the positioning plate 1 and extends a preset distance.

[0021] Further, place the PCB board on the positioning plate 1. The fixed column 2 in contact with the bottom surface of the PCB board is subjected to its gravity. Analyzing the forces on the fixed column 2, the gravity of the PCB is greater than the sum of the magnetic force and the gravity of the fixed column 2, causing the fixed column 2 in contact with the bottom surface of the PCB board to return to the initial state and still be subjected to the magnetic force. The PCB board placed on the positioning plate 1 is subjected to the forces of the remaining fixed columns 2 around it, fixing the PCB board.

[0022] Embodiment 2

[0023] Referring to Figure 1 , a structural schematic diagram of a chip mounter of the present utility model is shown, which specifically may include: a positioning plate 1, a fixed column 2, a permanent magnet 3, an electromagnet 4, a movable cavity 5, and a protrusion block 6; the electromagnet 4 is provided at the bottom of the positioning plate 1; the positioning plate 1 is provided with a plurality of movable cavities 5 communicating with the space where the electromagnet 4 is placed; through holes are respectively provided at both ends of the movable cavity 5; a protrusion block 6 is provided at one end of the fixed column 2; the end of the fixed column 2 provided with the protrusion block 6 is arranged in the movable cavity 5, and the other end passes through the hole near the surface of the positioning plate 1 and extends a preset distance; a permanent magnet 3 is provided at the end of the fixed column 2 provided with the protrusion block 6.

[0024] It should be noted that the working principle of the present utility model is realized through the interaction between a permanent magnet and an electromagnet. In the initial state, the electromagnet 4 is not energized, and the fixed column 2 is exactly stuck at a position close to the electromagnet 4 under the action of gravity and the protrusion block 6. When the electromagnet 4 is energized, its magnetic pole is the same as the magnetic pole of the permanent magnet 3 provided on the fixed column 2. If the end of the permanent magnet 3 close to the electromagnet 4 is the N pole, then the electromagnet 4 is controlled to emit a magnetic field of the N pole. Similarly, if the end of the permanent magnet 3 close to the electromagnet 4 is the S pole, then the electromagnet 4 is controlled to emit a magnetic field of the S pole. Thus, the fixed column 2 is subjected to a repulsive force, which is greater than the gravity of the fixed column 2, causing it to move upward along the movable cavity 5 and finally get stuck in the hole close to the surface of the positioning plate 1. The remaining part of the fixed column 2 without the protrusion block 6 passes through the hole close to the surface of the positioning plate 1 and extends a preset distance.

[0025] Further, place the PCB board on the positioning plate 1. The fixed column 2 in contact with the bottom surface of the PCB board is subjected to its gravity. Analyzing the forces on the fixed column 2, the gravity of the PCB is greater than the sum of the magnetic force and the gravity of the fixed column 2, causing the fixed column 2 in contact with the bottom surface of the PCB board to return to the initial state and still be subjected to the magnetic force. The PCB board placed on the positioning plate 1 is subjected to the forces of the remaining fixed columns 2 around it, fixing the PCB board.

[0026] Combined Figure 2 , a top view of an embodiment of a chip mounter of the present utility model is shown. The movable cavities 5 are arranged in a row and column array on the positioning plate 1; through holes are respectively arranged at both ends of the movable cavity 5; the diameter of the hole is 2.5 mm. It should be noted that the row and column array setting divides the grid on the positioning plate 1, and each unit corresponds to a fixed column 2, which is more conducive to fine control. Further, the electromagnet 4 and the fixed column 2 are arranged in one-to-one correspondence. Further, sensors are arranged in the holes of each movable cavity 5 close to the electromagnet 4. The sensors can detect whether the fixed column is subjected to the pressure of the PCB board, or used to detect the size information of the PCB, and then the work of the electromagnet 4 corresponding to the fixed column 2 in contact with the bottom of the PCB board can be stopped, which can further save energy.

[0027] Further, the chip mounter further includes a control center; the control center is electrically connected to the electromagnet 4. It should be noted that the control center can control whether the electromagnet 4 works. Further, the control center is electrically connected to the sensor. When the sensor detects the signal of the fixed column 2 in contact with the bottom of the PCB board and transmits it to the control center, the control center controls the corresponding electromagnet 4 to stop working, saving energy.

[0028] Further, the patch fixture is also provided with a switch button, which is electrically connected to the control center. The switch button controls the power on and off of the circuit. When the "on" button of the switch button is pressed, the patch fixture is powered on. Conversely, when the "off" button of the switch button is pressed, the patch fixture is powered off.

[0029] Further, the patch fixture further includes a display module; the display module is electrically connected to the control center. It should be noted that the display module displays the size of the PCB board and the magnetic force of the electromagnet 4. Additionally, by knowing data such as the current of the electromagnet 4, the magnetic force can be roughly calculated, and buttons can be set to adjust the magnetic force.

[0030] Further, connection holes for installation are provided on the side end of the positioning plate 1. It should be noted that the patch fixture is often used in conjunction with a detection device. By providing connection holes, it is convenient to install the patch fixture on the detection device.

[0031] Finally, it should also be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0032] The above provides a detailed introduction to a patch fixture provided by the present invention. Specific examples are used in this text to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for helping to understand the method and core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A patch fixture, characterized in that: include: A positioning plate, a fixing column, a permanent magnet, an electromagnet, a movable cavity and a protruding block; The electromagnet is arranged at the bottom of the positioning plate; The positioning plate is provided with a plurality of movable cavities communicating with the space where the electromagnet is placed; Through holes are respectively arranged at both ends of the movable cavity, and the protrusion block is arranged at one end of the fixed column; The fixing column is provided with the protrusion block, one end of which is arranged in the movable cavity, and the other end of which passes through the hole close to the surface of the positioning plate and extends out a preset distance; The permanent magnet is arranged at one end of the fixing column where the protruding block is arranged.

2. The patch fixture according to claim 1, characterized in that: The active cavity row and column array is arranged on the positioning plate; Through holes are respectively arranged at two ends of the active cavity.

3. The patch fixture according to claim 2, characterized in that: The diameter of the hole is 2.5 mm.

4. The patch fixture according to claim 1, characterized in that: The patch fixture also includes a control center; The control center is electrically connected to the electromagnet.

5. The patch fixture according to claim 4, characterized in that: The patch fixture also includes a display screen module; The display screen module is electrically connected to the control center.

6. The patch fixture according to claim 1, characterized in that: The side end of the positioning plate is provided with a connection hole for installation.

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