Integrated flexible jacking tool and flexible jacking tool combination

Abstract

The invention relates to an integrated flexible ejector and a flexible ejector combination, the ejector comprises a base and ejector pins arranged on the base, the ejector pins are flexible ejector pins, and all the flexible ejector pins are arranged to form an array; the base is in a cuboid shape, the flexible ejector pins are made of mould pressing silica gel soft materials, and the sum of the cross sectional areas of all the flexible ejector pins exceeds 50% of the cross sectional area of the base. Compared with the prior art, the flexible ejector pins are adopted and arranged into the array, the sum of the cross sectional areas of all the flexible ejector pins exceeds 50% of the cross sectional area of the base, supported components can be protected, avoiding is not needed, the supporting area is effectively increased, supporting force is more uniform, and the yield of the welding technology can be increased.

Description

Technical Field

[0001] The present invention relates to a flexible ejector, and in particular to an integrated flexible ejector and a flexible ejector combination. Background Art

[0002] Screen printing is a process in which solder paste or patch glue is extruded onto the printed position of a printed circuit board through a stencil with a printed pattern by a squeegee. In the above screen printing process flow, the accuracy of the printing ejector has an important impact on the printing effect and the soldering effect.

[0003] Surface Mount Technology (SMT) mainly includes: solder paste printing, precise chip placement, and reflow soldering. Among them, the quality of solder paste printing has a great impact on the quality of surface mount products. According to industry evaluations and analyses, about 60% of the repaired circuit boards are caused by poor solder paste printing.

[0004] In traditional ejectors, since the ejector pins are made of hard materials, in order to avoid damaging the components on the circuit board, avoidance treatment is required. In the double-sided reflow process, there is uneven support force, resulting in too low a yield rate. Summary of the Invention

[0005] The purpose of the present invention is to provide an integrated flexible ejector and a flexible ejector combination. Flexible ejector pins are used and arranged in an array, and the sum of the cross-sectional areas of all flexible ejector pins exceeds 50% of the cross-sectional area of the base. This can protect the supported components, thus eliminating the need for avoidance, effectively increasing the support area, making the support force more uniform, and improving the yield rate of the soldering process.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] An integrated flexible ejector includes a base and ejector pins provided on the base. The ejector pins are flexible ejector pins, and all flexible ejector pins are arranged to form an array;

[0008] The base is in the shape of a cuboid. The flexible ejector pins are made of a molded silicone soft material, and the sum of the cross-sectional areas of all flexible ejector pins exceeds 50% of the cross-sectional area of the base.

[0009] The base is provided with jacks for detachably connecting the flexible ejector pins. The flexible ejector pins are inserted into the jacks, and the height of the part of the flexible ejector pins outside the base is one-fourth to one-fifth of the height of the base.

[0010] The array formed by the arrangement of the flexible ejector pins is a matrix array.

[0011] The base includes electromagnets, a power supply, and a conduction control circuit for controlling the conduction of the electromagnets provided inside two sides of the base.

[0012] The conduction control circuit includes a switch and a current-limiting resistor. One end of the switch is connected to the positive pole of the power supply, and the other end is connected to one end of the coil of the electromagnet via the current-limiting resistor. The other end of the coil of the electromagnet is connected to the negative pole of the power supply.

[0013] A partition is provided inside the base. The partition divides the inner cavity of the base into a first chamber and a second chamber arranged up and down. The electromagnet and the conduction control circuit are located in the second chamber.

[0014] The partition is a heat-insulating plate.

[0015] The switch is a push-button switch.

[0016] The first chamber is also provided with a cement counterweight.

[0017] A flexible top tool combination is composed of a plurality of top tools as described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By using flexible top pins, which are arranged side by side in an array, and the sum of the cross-sectional areas of all the flexible top pins exceeds 50% of the cross-sectional area of the base, the components to be supported can be protected, so there is no need to avoid, and thus the support area can be effectively increased, and the supporting force is more uniform, which can improve the yield rate of the welding process.

[0020] 2. By using a molded silicone soft material, it has better thermal stability, radiation resistance and weather resistance than other polymer materials. The service life of silicone in the natural environment can reach several decades, which improves reliability and reduces consumables. At the same time, it has good electrical insulation performance, and its dielectric loss, withstand voltage, arc resistance, corona resistance, volume resistivity and surface resistivity are all excellent among insulating materials, and their electrical properties are little affected by temperature and frequency. Therefore, they are a stable electrical insulation material and are widely used in the electronics and electrical industries. In addition to having excellent heat resistance, they also have excellent water repellency, which is a guarantee for the high reliability of electrical equipment used under wet conditions.

[0021] 3. By adopting a matrix array design, a relatively reliable support can be formed for a circuit board with regular distribution.

[0022] 4. By using an electromagnet to realize the splicing of multiple top tools, the splicing effect is more firm, which can improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention;

[0024] Figure 2Top view schematic diagram of the present invention;

[0025] Figure 3 Longitudinal cross-sectional schematic diagram of the present invention;

[0026] Figure 4 Circuit schematic diagram of the electric control part of the present invention;

[0027] Wherein: 1. Base, 2 Flexible thimble, 1-1 Partition, 1-2 Jack, 1-3 First electromagnet, 1-4 Second electromagnet, E1 Power supply, both R1 and R2 are current-limiting resistors, both S1 and S2 are switches, and both K1 and K2 are coils of the electromagnet. Specific embodiments

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and gives detailed implementation manners and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0029] An integrated flexible top tool, as Figure 1 shown, includes a base 1 and a thimble provided on the base 1. The thimble is a flexible thimble 2, and all the flexible thimbles 2 are arranged in an array;

[0030] The base 1 is in the shape of a cuboid. The flexible thimble 2 is made of molded silicone soft material, and the sum of the cross-sectional areas of all the flexible thimbles 2 exceeds 50% of the cross-sectional area of the base 1.

[0031] By using the flexible thimble 2 and arranging it in an array as Figure 2 shown, and the sum of the cross-sectional areas of all the flexible thimbles 2 exceeds 50% of the cross-sectional area of the base 1, the components to be supported can be protected, so there is no need to avoid, and thus the support area can be effectively increased, and the supporting force is more uniform, which can improve the yield rate of the welding process.

[0032] Moreover, by using the molded silicone soft material, it has better thermal stability, radiation resistance and weather resistance than other polymer materials. The service life of silicone in the natural environment can reach several decades, which improves reliability and reduces consumables. At the same time, it has good electrical insulation performance, and its dielectric loss, withstand voltage, arc resistance, corona resistance, volume resistivity and surface resistivity are all excellent among insulating materials, and their electrical properties are little affected by temperature and frequency. Therefore, they are a kind of stable electrical insulation materials and are widely used in the electronics and electrical industries. In addition to having excellent heat resistance, it also has excellent water repellency, which is a guarantee for the high reliability of electrical equipment when used under wet conditions.

[0033] In this embodiment, as Figure 3As shown, the base 1 is provided with a jack 1-2 for detachably connecting the flexible thimble 2. The flexible thimble 2 is inserted into the jack 1-2, and the height of the part of the flexible thimble 2 outside the base 1 is one-fourth to one-fifth of the height of the base 1. Of course, in other embodiments, other forms can also be adopted. For example, the flexible thimble 2 can be fixed on the upper surface of the base 1.

[0034] As Figure 2 shown, in this embodiment, the array formed by arranging the flexible thimbles 2 is a matrix array. By adopting the matrix array design, a relatively reliable support can be formed for the regularly distributed circuit board.

[0035] In some embodiments, the base 1 includes electromagnets, a power supply, and a conduction control circuit for controlling the conduction of the electromagnets inside the two sides of the base 1. The electromagnets are used to realize the splicing of multiple top tools, and the splicing effect is more firm, which can improve the stability. Generally, they can be arranged at the bottom position inside two adjacent sides, that is Figure 3 the first electromagnet 1-3 and the second electromagnet 1-4 in Figure 4 shown, the conduction control circuit includes a switch and a current-limiting resistor, namely switch S1, switch S2, current-limiting resistor R1, and current-limiting resistor R2. One end of switch S1 is connected to the positive pole of power supply E1, and the other end is connected to one end of the coil of the electromagnet via current-limiting resistor R1. The other end of the coil of the electromagnet is connected to the negative pole of power supply E1. Figure 4 K1 in

[0036] is the coil of the first electromagnet 1-3, and K2 is the coil of the second electromagnet 1-4. Similarly, one end of switch S2 is connected to the positive pole of power supply E1, and the other end is connected to one end of the coil of the electromagnet via current-limiting resistor R2. The other end of the coil of the electromagnet is connected to the negative pole of power supply E1. Switch S1 and switch S2 can be selected as push-button switches.

[0037] In some embodiments, as Figure 3 shown, a partition 1-1 is provided inside the base 1. The partition 1-1 divides the inner cavity of the base 1 into a first chamber and a second chamber arranged up and down. The electromagnet and the conduction control circuit are located in the second chamber. Generally, the partition 1-1 is a heat-insulating board.

[0038] In some embodiments, the first chamber is also provided with a cement counterweight to further improve the stability.

[0039] In addition, the present application also provides a flexible top tool combination, which is composed of multiple top tools as described above.

[0040] The above integrated flexible ejector increases the number of ejector pins per unit area and improves the ejector density to ensure better support performance. The overall ejector is designed modularly, made in the shape of a rectangle with standard dimensions, and spliced as needed according to the size requirements of different products to maximize the utilization of the ejector and save production resources.

[0041] Moreover, when the flexible ejector pin rebounds downward, it provides a certain amount of support force to achieve the purpose of uniform support.

Claims

1. An integrated flexible ejector, comprising a base and an ejector pin disposed on the base, characterized in that, the ejector pin is a flexible ejector pin, and all the flexible ejector pins are arranged to form an array; the base is in the shape of a cuboid, the flexible ejector pin is made of a molded silicone soft material, and the sum of the cross-sectional areas of all the flexible ejector pins exceeds 50% of the cross-sectional area of the base.

2. The integrated flexible ejector according to claim 1, characterized in that, the base is provided with a jack for detachably connecting the flexible ejector pin, the flexible ejector pin is inserted into the jack, and the height of the part of the flexible ejector pin outside the base is one-fourth to one-fifth of the height of the base.

3. The integrated flexible ejector according to claim 1, characterized in that, the array formed by arranging the flexible ejector pins is a matrix array.

4. The integrated flexible ejector according to claim 1, characterized in that, the base includes electromagnets, a power supply and a conduction control circuit for controlling the conduction of the electromagnets inside the two side surfaces of the base.

5. The integrated flexible ejector according to claim 4, characterized in that, the conduction control circuit includes a switch and a current-limiting resistor. One end of the switch is connected to the positive pole of the power supply, and the other end is connected to one end of the coil of the electromagnet via the current-limiting resistor. The other end of the coil of the electromagnet is connected to the negative pole of the power supply.

6. The integrated flexible ejector according to claim 4, characterized in that, a partition is provided inside the base, and the partition divides the inner cavity of the base into a first chamber and a second chamber arranged up and down. The electromagnet and the conduction control circuit are located in the second chamber.

7. The integrated flexible ejector according to claim 6, characterized in that, the partition is a heat-insulating plate.

8. The integrated flexible ejector according to claim 4, characterized in that, the switch is a push-button switch.

9. The integrated flexible ejector according to claim 6, characterized in that, the first chamber is also provided with a cement counterweight.

10. A flexible ejector combination, characterized in that, it is composed of a plurality of ejectors as described in any one of claims 1-9.

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